kind of kernel debugging operations.
When in doubt, say "N".
-config BFIN_JTAG_COMM
- tristate "Blackfin JTAG Communication"
- depends on BLACKFIN
- help
- Add support for emulating a TTY device over the Blackfin JTAG.
-
- To compile this driver as a module, choose M here: the
- module will be called bfin_jtag_comm.
-
-config BFIN_JTAG_COMM_CONSOLE
- bool "Console on Blackfin JTAG"
- depends on BFIN_JTAG_COMM=y
-
-config SERIAL_NONSTANDARD
- bool "Non-standard serial port support"
- depends on HAS_IOMEM
- ---help---
- Say Y here if you have any non-standard serial boards -- boards
- which aren't supported using the standard "dumb" serial driver.
- This includes intelligent serial boards such as Cyclades,
- Digiboards, etc. These are usually used for systems that need many
- serial ports because they serve many terminals or dial-in
- connections.
-
- Note that the answer to this question won't directly affect the
- kernel: saying N will just cause the configurator to skip all
- the questions about non-standard serial boards.
-
- Most people can say N here.
-
config COMPUTONE
tristate "Computone IntelliPort Plus serial support"
depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
To compile this driver as module, choose M here: the
module will be called ip2.
-config ROCKETPORT
- tristate "Comtrol RocketPort support"
- depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
- help
- This driver supports Comtrol RocketPort and RocketModem PCI boards.
- These boards provide 2, 4, 8, 16, or 32 high-speed serial ports or
- modems. For information about the RocketPort/RocketModem boards
- and this driver read <file:Documentation/serial/rocket.txt>.
-
- To compile this driver as a module, choose M here: the
- module will be called rocket.
-
- If you want to compile this driver into the kernel, say Y here. If
- you don't have a Comtrol RocketPort/RocketModem card installed, say N.
-
-config CYCLADES
- tristate "Cyclades async mux support"
- depends on SERIAL_NONSTANDARD && (PCI || ISA)
- select FW_LOADER
- ---help---
- This driver supports Cyclades Z and Y multiserial boards.
- You would need something like this to connect more than two modems to
- your Linux box, for instance in order to become a dial-in server.
-
- For information about the Cyclades-Z card, read
- <file:Documentation/serial/README.cycladesZ>.
-
- To compile this driver as a module, choose M here: the
- module will be called cyclades.
-
- If you haven't heard about it, it's safe to say N.
-
-config CYZ_INTR
- bool "Cyclades-Z interrupt mode operation (EXPERIMENTAL)"
- depends on EXPERIMENTAL && CYCLADES
- help
- The Cyclades-Z family of multiport cards allows 2 (two) driver op
- modes: polling and interrupt. In polling mode, the driver will check
- the status of the Cyclades-Z ports every certain amount of time
- (which is called polling cycle and is configurable). In interrupt
- mode, it will use an interrupt line (IRQ) in order to check the
- status of the Cyclades-Z ports. The default op mode is polling. If
- unsure, say N.
-
config DIGIEPCA
tristate "Digiboard Intelligent Async Support"
depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
To compile this driver as a module, choose M here: the
module will be called epca.
-config MOXA_INTELLIO
- tristate "Moxa Intellio support"
- depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
- select FW_LOADER
- help
- Say Y here if you have a Moxa Intellio multiport serial card.
-
- To compile this driver as a module, choose M here: the
- module will be called moxa.
-
-config MOXA_SMARTIO
- tristate "Moxa SmartIO support v. 2.0"
- depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA)
- help
- Say Y here if you have a Moxa SmartIO multiport serial card and/or
- want to help develop a new version of this driver.
-
- This is upgraded (1.9.1) driver from original Moxa drivers with
- changes finally resulting in PCI probing.
-
- This driver can also be built as a module. The module will be called
- mxser. If you want to do that, say M here.
-
-config ISI
- tristate "Multi-Tech multiport card support (EXPERIMENTAL)"
- depends on SERIAL_NONSTANDARD && PCI
- select FW_LOADER
- help
- This is a driver for the Multi-Tech cards which provide several
- serial ports. The driver is experimental and can currently only be
- built as a module. The module will be called isicom.
- If you want to do that, choose M here.
-
-config SYNCLINK
- tristate "Microgate SyncLink card support"
- depends on SERIAL_NONSTANDARD && PCI && ISA_DMA_API
- help
- Provides support for the SyncLink ISA and PCI multiprotocol serial
- adapters. These adapters support asynchronous and HDLC bit
- synchronous communication up to 10Mbps (PCI adapter).
-
- This driver can only be built as a module ( = code which can be
- inserted in and removed from the running kernel whenever you want).
- The module will be called synclink. If you want to do that, say M
- here.
-
-config SYNCLINKMP
- tristate "SyncLink Multiport support"
- depends on SERIAL_NONSTANDARD && PCI
- help
- Enable support for the SyncLink Multiport (2 or 4 ports)
- serial adapter, running asynchronous and HDLC communications up
- to 2.048Mbps. Each ports is independently selectable for
- RS-232, V.35, RS-449, RS-530, and X.21
-
- This driver may be built as a module ( = code which can be
- inserted in and removed from the running kernel whenever you want).
- The module will be called synclinkmp. If you want to do that, say M
- here.
-
-config SYNCLINK_GT
- tristate "SyncLink GT/AC support"
- depends on SERIAL_NONSTANDARD && PCI
- help
- Support for SyncLink GT and SyncLink AC families of
- synchronous and asynchronous serial adapters
- manufactured by Microgate Systems, Ltd. (www.microgate.com)
-
-config N_HDLC
- tristate "HDLC line discipline support"
- depends on SERIAL_NONSTANDARD
- help
- Allows synchronous HDLC communications with tty device drivers that
- support synchronous HDLC such as the Microgate SyncLink adapter.
-
- This driver can be built as a module ( = code which can be
- inserted in and removed from the running kernel whenever you want).
- The module will be called n_hdlc. If you want to do that, say M
- here.
-
-config N_GSM
- tristate "GSM MUX line discipline support (EXPERIMENTAL)"
- depends on EXPERIMENTAL
- depends on NET
- help
- This line discipline provides support for the GSM MUX protocol and
- presents the mux as a set of 61 individual tty devices.
-
config RISCOM8
tristate "SDL RISCom/8 card support"
depends on SERIAL_NONSTANDARD
To compile this driver as a module, choose M here: the
module will be called istallion.
-config NOZOMI
- tristate "HSDPA Broadband Wireless Data Card - Globe Trotter"
- depends on PCI && EXPERIMENTAL
- help
- If you have a HSDPA driver Broadband Wireless Data Card -
- Globe Trotter PCMCIA card, say Y here.
-
- To compile this driver as a module, choose M here, the module
- will be called nozomi.
-
config A2232
tristate "Commodore A2232 serial support (EXPERIMENTAL)"
depends on EXPERIMENTAL && ZORRO && BROKEN
obj-y += mem.o random.o
obj-$(CONFIG_TTY_PRINTK) += ttyprintk.o
obj-y += misc.o
-obj-$(CONFIG_BFIN_JTAG_COMM) += bfin_jtag_comm.o
obj-$(CONFIG_MVME147_SCC) += generic_serial.o vme_scc.o
obj-$(CONFIG_MVME162_SCC) += generic_serial.o vme_scc.o
obj-$(CONFIG_BVME6000_SCC) += generic_serial.o vme_scc.o
-obj-$(CONFIG_ROCKETPORT) += rocket.o
obj-$(CONFIG_SERIAL167) += serial167.o
-obj-$(CONFIG_CYCLADES) += cyclades.o
obj-$(CONFIG_STALLION) += stallion.o
obj-$(CONFIG_ISTALLION) += istallion.o
-obj-$(CONFIG_NOZOMI) += nozomi.o
obj-$(CONFIG_DIGIEPCA) += epca.o
obj-$(CONFIG_SPECIALIX) += specialix.o
-obj-$(CONFIG_MOXA_INTELLIO) += moxa.o
obj-$(CONFIG_A2232) += ser_a2232.o generic_serial.o
obj-$(CONFIG_ATARI_DSP56K) += dsp56k.o
-obj-$(CONFIG_MOXA_SMARTIO) += mxser.o
obj-$(CONFIG_COMPUTONE) += ip2/
obj-$(CONFIG_RISCOM8) += riscom8.o
-obj-$(CONFIG_ISI) += isicom.o
-obj-$(CONFIG_SYNCLINK) += synclink.o
-obj-$(CONFIG_SYNCLINKMP) += synclinkmp.o
-obj-$(CONFIG_SYNCLINK_GT) += synclink_gt.o
-obj-$(CONFIG_AMIGA_BUILTIN_SERIAL) += amiserial.o
obj-$(CONFIG_SX) += sx.o generic_serial.o
obj-$(CONFIG_RIO) += rio/ generic_serial.o
obj-$(CONFIG_RAW_DRIVER) += raw.o
+++ /dev/null
-/*
- * linux/drivers/char/amiserial.c
- *
- * Serial driver for the amiga builtin port.
- *
- * This code was created by taking serial.c version 4.30 from kernel
- * release 2.3.22, replacing all hardware related stuff with the
- * corresponding amiga hardware actions, and removing all irrelevant
- * code. As a consequence, it uses many of the constants and names
- * associated with the registers and bits of 16550 compatible UARTS -
- * but only to keep track of status, etc in the state variables. It
- * was done this was to make it easier to keep the code in line with
- * (non hardware specific) changes to serial.c.
- *
- * The port is registered with the tty driver as minor device 64, and
- * therefore other ports should should only use 65 upwards.
- *
- * Richard Lucock 28/12/99
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- * Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997,
- * 1998, 1999 Theodore Ts'o
- *
- */
-
-/*
- * Serial driver configuration section. Here are the various options:
- *
- * SERIAL_PARANOIA_CHECK
- * Check the magic number for the async_structure where
- * ever possible.
- */
-
-#include <linux/delay.h>
-
-#undef SERIAL_PARANOIA_CHECK
-#define SERIAL_DO_RESTART
-
-/* Set of debugging defines */
-
-#undef SERIAL_DEBUG_INTR
-#undef SERIAL_DEBUG_OPEN
-#undef SERIAL_DEBUG_FLOW
-#undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-
-/* Sanity checks */
-
-#if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
-#define DBG_CNT(s) printk("(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
- tty->name, (info->flags), serial_driver->refcount,info->count,tty->count,s)
-#else
-#define DBG_CNT(s)
-#endif
-
-/*
- * End of serial driver configuration section.
- */
-
-#include <linux/module.h>
-
-#include <linux/types.h>
-#include <linux/serial.h>
-#include <linux/serialP.h>
-#include <linux/serial_reg.h>
-static char *serial_version = "4.30";
-
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/console.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/mm.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-#include <linux/platform_device.h>
-
-#include <asm/setup.h>
-
-#include <asm/system.h>
-
-#include <asm/irq.h>
-
-#include <asm/amigahw.h>
-#include <asm/amigaints.h>
-
-#define custom amiga_custom
-static char *serial_name = "Amiga-builtin serial driver";
-
-static struct tty_driver *serial_driver;
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS 256
-
-static struct async_struct *IRQ_ports;
-
-static unsigned char current_ctl_bits;
-
-static void change_speed(struct async_struct *info, struct ktermios *old);
-static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
-
-
-static struct serial_state rs_table[1];
-
-#define NR_PORTS ARRAY_SIZE(rs_table)
-
-#include <asm/uaccess.h>
-
-#define serial_isroot() (capable(CAP_SYS_ADMIN))
-
-
-static inline int serial_paranoia_check(struct async_struct *info,
- char *name, const char *routine)
-{
-#ifdef SERIAL_PARANOIA_CHECK
- static const char *badmagic =
- "Warning: bad magic number for serial struct (%s) in %s\n";
- static const char *badinfo =
- "Warning: null async_struct for (%s) in %s\n";
-
- if (!info) {
- printk(badinfo, name, routine);
- return 1;
- }
- if (info->magic != SERIAL_MAGIC) {
- printk(badmagic, name, routine);
- return 1;
- }
-#endif
- return 0;
-}
-
-/* some serial hardware definitions */
-#define SDR_OVRUN (1<<15)
-#define SDR_RBF (1<<14)
-#define SDR_TBE (1<<13)
-#define SDR_TSRE (1<<12)
-
-#define SERPER_PARENB (1<<15)
-
-#define AC_SETCLR (1<<15)
-#define AC_UARTBRK (1<<11)
-
-#define SER_DTR (1<<7)
-#define SER_RTS (1<<6)
-#define SER_DCD (1<<5)
-#define SER_CTS (1<<4)
-#define SER_DSR (1<<3)
-
-static __inline__ void rtsdtr_ctrl(int bits)
-{
- ciab.pra = ((bits & (SER_RTS | SER_DTR)) ^ (SER_RTS | SER_DTR)) | (ciab.pra & ~(SER_RTS | SER_DTR));
-}
-
-/*
- * ------------------------------------------------------------
- * rs_stop() and rs_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- * ------------------------------------------------------------
- */
-static void rs_stop(struct tty_struct *tty)
-{
- struct async_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->name, "rs_stop"))
- return;
-
- local_irq_save(flags);
- if (info->IER & UART_IER_THRI) {
- info->IER &= ~UART_IER_THRI;
- /* disable Tx interrupt and remove any pending interrupts */
- custom.intena = IF_TBE;
- mb();
- custom.intreq = IF_TBE;
- mb();
- }
- local_irq_restore(flags);
-}
-
-static void rs_start(struct tty_struct *tty)
-{
- struct async_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->name, "rs_start"))
- return;
-
- local_irq_save(flags);
- if (info->xmit.head != info->xmit.tail
- && info->xmit.buf
- && !(info->IER & UART_IER_THRI)) {
- info->IER |= UART_IER_THRI;
- custom.intena = IF_SETCLR | IF_TBE;
- mb();
- /* set a pending Tx Interrupt, transmitter should restart now */
- custom.intreq = IF_SETCLR | IF_TBE;
- mb();
- }
- local_irq_restore(flags);
-}
-
-/*
- * ----------------------------------------------------------------------
- *
- * Here starts the interrupt handling routines. All of the following
- * subroutines are declared as inline and are folded into
- * rs_interrupt(). They were separated out for readability's sake.
- *
- * Note: rs_interrupt() is a "fast" interrupt, which means that it
- * runs with interrupts turned off. People who may want to modify
- * rs_interrupt() should try to keep the interrupt handler as fast as
- * possible. After you are done making modifications, it is not a bad
- * idea to do:
- *
- * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
- *
- * and look at the resulting assemble code in serial.s.
- *
- * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
- * -----------------------------------------------------------------------
- */
-
-/*
- * This routine is used by the interrupt handler to schedule
- * processing in the software interrupt portion of the driver.
- */
-static void rs_sched_event(struct async_struct *info,
- int event)
-{
- info->event |= 1 << event;
- tasklet_schedule(&info->tlet);
-}
-
-static void receive_chars(struct async_struct *info)
-{
- int status;
- int serdatr;
- struct tty_struct *tty = info->tty;
- unsigned char ch, flag;
- struct async_icount *icount;
- int oe = 0;
-
- icount = &info->state->icount;
-
- status = UART_LSR_DR; /* We obviously have a character! */
- serdatr = custom.serdatr;
- mb();
- custom.intreq = IF_RBF;
- mb();
-
- if((serdatr & 0x1ff) == 0)
- status |= UART_LSR_BI;
- if(serdatr & SDR_OVRUN)
- status |= UART_LSR_OE;
-
- ch = serdatr & 0xff;
- icount->rx++;
-
-#ifdef SERIAL_DEBUG_INTR
- printk("DR%02x:%02x...", ch, status);
-#endif
- flag = TTY_NORMAL;
-
- /*
- * We don't handle parity or frame errors - but I have left
- * the code in, since I'm not sure that the errors can't be
- * detected.
- */
-
- if (status & (UART_LSR_BI | UART_LSR_PE |
- UART_LSR_FE | UART_LSR_OE)) {
- /*
- * For statistics only
- */
- if (status & UART_LSR_BI) {
- status &= ~(UART_LSR_FE | UART_LSR_PE);
- icount->brk++;
- } else if (status & UART_LSR_PE)
- icount->parity++;
- else if (status & UART_LSR_FE)
- icount->frame++;
- if (status & UART_LSR_OE)
- icount->overrun++;
-
- /*
- * Now check to see if character should be
- * ignored, and mask off conditions which
- * should be ignored.
- */
- if (status & info->ignore_status_mask)
- goto out;
-
- status &= info->read_status_mask;
-
- if (status & (UART_LSR_BI)) {
-#ifdef SERIAL_DEBUG_INTR
- printk("handling break....");
-#endif
- flag = TTY_BREAK;
- if (info->flags & ASYNC_SAK)
- do_SAK(tty);
- } else if (status & UART_LSR_PE)
- flag = TTY_PARITY;
- else if (status & UART_LSR_FE)
- flag = TTY_FRAME;
- if (status & UART_LSR_OE) {
- /*
- * Overrun is special, since it's
- * reported immediately, and doesn't
- * affect the current character
- */
- oe = 1;
- }
- }
- tty_insert_flip_char(tty, ch, flag);
- if (oe == 1)
- tty_insert_flip_char(tty, 0, TTY_OVERRUN);
- tty_flip_buffer_push(tty);
-out:
- return;
-}
-
-static void transmit_chars(struct async_struct *info)
-{
- custom.intreq = IF_TBE;
- mb();
- if (info->x_char) {
- custom.serdat = info->x_char | 0x100;
- mb();
- info->state->icount.tx++;
- info->x_char = 0;
- return;
- }
- if (info->xmit.head == info->xmit.tail
- || info->tty->stopped
- || info->tty->hw_stopped) {
- info->IER &= ~UART_IER_THRI;
- custom.intena = IF_TBE;
- mb();
- return;
- }
-
- custom.serdat = info->xmit.buf[info->xmit.tail++] | 0x100;
- mb();
- info->xmit.tail = info->xmit.tail & (SERIAL_XMIT_SIZE-1);
- info->state->icount.tx++;
-
- if (CIRC_CNT(info->xmit.head,
- info->xmit.tail,
- SERIAL_XMIT_SIZE) < WAKEUP_CHARS)
- rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
-
-#ifdef SERIAL_DEBUG_INTR
- printk("THRE...");
-#endif
- if (info->xmit.head == info->xmit.tail) {
- custom.intena = IF_TBE;
- mb();
- info->IER &= ~UART_IER_THRI;
- }
-}
-
-static void check_modem_status(struct async_struct *info)
-{
- unsigned char status = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
- unsigned char dstatus;
- struct async_icount *icount;
-
- /* Determine bits that have changed */
- dstatus = status ^ current_ctl_bits;
- current_ctl_bits = status;
-
- if (dstatus) {
- icount = &info->state->icount;
- /* update input line counters */
- if (dstatus & SER_DSR)
- icount->dsr++;
- if (dstatus & SER_DCD) {
- icount->dcd++;
-#ifdef CONFIG_HARD_PPS
- if ((info->flags & ASYNC_HARDPPS_CD) &&
- !(status & SER_DCD))
- hardpps();
-#endif
- }
- if (dstatus & SER_CTS)
- icount->cts++;
- wake_up_interruptible(&info->delta_msr_wait);
- }
-
- if ((info->flags & ASYNC_CHECK_CD) && (dstatus & SER_DCD)) {
-#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
- printk("ttyS%d CD now %s...", info->line,
- (!(status & SER_DCD)) ? "on" : "off");
-#endif
- if (!(status & SER_DCD))
- wake_up_interruptible(&info->open_wait);
- else {
-#ifdef SERIAL_DEBUG_OPEN
- printk("doing serial hangup...");
-#endif
- if (info->tty)
- tty_hangup(info->tty);
- }
- }
- if (info->flags & ASYNC_CTS_FLOW) {
- if (info->tty->hw_stopped) {
- if (!(status & SER_CTS)) {
-#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
- printk("CTS tx start...");
-#endif
- info->tty->hw_stopped = 0;
- info->IER |= UART_IER_THRI;
- custom.intena = IF_SETCLR | IF_TBE;
- mb();
- /* set a pending Tx Interrupt, transmitter should restart now */
- custom.intreq = IF_SETCLR | IF_TBE;
- mb();
- rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
- return;
- }
- } else {
- if ((status & SER_CTS)) {
-#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
- printk("CTS tx stop...");
-#endif
- info->tty->hw_stopped = 1;
- info->IER &= ~UART_IER_THRI;
- /* disable Tx interrupt and remove any pending interrupts */
- custom.intena = IF_TBE;
- mb();
- custom.intreq = IF_TBE;
- mb();
- }
- }
- }
-}
-
-static irqreturn_t ser_vbl_int( int irq, void *data)
-{
- /* vbl is just a periodic interrupt we tie into to update modem status */
- struct async_struct * info = IRQ_ports;
- /*
- * TBD - is it better to unregister from this interrupt or to
- * ignore it if MSI is clear ?
- */
- if(info->IER & UART_IER_MSI)
- check_modem_status(info);
- return IRQ_HANDLED;
-}
-
-static irqreturn_t ser_rx_int(int irq, void *dev_id)
-{
- struct async_struct * info;
-
-#ifdef SERIAL_DEBUG_INTR
- printk("ser_rx_int...");
-#endif
-
- info = IRQ_ports;
- if (!info || !info->tty)
- return IRQ_NONE;
-
- receive_chars(info);
- info->last_active = jiffies;
-#ifdef SERIAL_DEBUG_INTR
- printk("end.\n");
-#endif
- return IRQ_HANDLED;
-}
-
-static irqreturn_t ser_tx_int(int irq, void *dev_id)
-{
- struct async_struct * info;
-
- if (custom.serdatr & SDR_TBE) {
-#ifdef SERIAL_DEBUG_INTR
- printk("ser_tx_int...");
-#endif
-
- info = IRQ_ports;
- if (!info || !info->tty)
- return IRQ_NONE;
-
- transmit_chars(info);
- info->last_active = jiffies;
-#ifdef SERIAL_DEBUG_INTR
- printk("end.\n");
-#endif
- }
- return IRQ_HANDLED;
-}
-
-/*
- * -------------------------------------------------------------------
- * Here ends the serial interrupt routines.
- * -------------------------------------------------------------------
- */
-
-/*
- * This routine is used to handle the "bottom half" processing for the
- * serial driver, known also the "software interrupt" processing.
- * This processing is done at the kernel interrupt level, after the
- * rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
- * is where time-consuming activities which can not be done in the
- * interrupt driver proper are done; the interrupt driver schedules
- * them using rs_sched_event(), and they get done here.
- */
-
-static void do_softint(unsigned long private_)
-{
- struct async_struct *info = (struct async_struct *) private_;
- struct tty_struct *tty;
-
- tty = info->tty;
- if (!tty)
- return;
-
- if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event))
- tty_wakeup(tty);
-}
-
-/*
- * ---------------------------------------------------------------
- * Low level utility subroutines for the serial driver: routines to
- * figure out the appropriate timeout for an interrupt chain, routines
- * to initialize and startup a serial port, and routines to shutdown a
- * serial port. Useful stuff like that.
- * ---------------------------------------------------------------
- */
-
-static int startup(struct async_struct * info)
-{
- unsigned long flags;
- int retval=0;
- unsigned long page;
-
- page = get_zeroed_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
-
- local_irq_save(flags);
-
- if (info->flags & ASYNC_INITIALIZED) {
- free_page(page);
- goto errout;
- }
-
- if (info->xmit.buf)
- free_page(page);
- else
- info->xmit.buf = (unsigned char *) page;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("starting up ttys%d ...", info->line);
-#endif
-
- /* Clear anything in the input buffer */
-
- custom.intreq = IF_RBF;
- mb();
-
- retval = request_irq(IRQ_AMIGA_VERTB, ser_vbl_int, 0, "serial status", info);
- if (retval) {
- if (serial_isroot()) {
- if (info->tty)
- set_bit(TTY_IO_ERROR,
- &info->tty->flags);
- retval = 0;
- }
- goto errout;
- }
-
- /* enable both Rx and Tx interrupts */
- custom.intena = IF_SETCLR | IF_RBF | IF_TBE;
- mb();
- info->IER = UART_IER_MSI;
-
- /* remember current state of the DCD and CTS bits */
- current_ctl_bits = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
-
- IRQ_ports = info;
-
- info->MCR = 0;
- if (info->tty->termios->c_cflag & CBAUD)
- info->MCR = SER_DTR | SER_RTS;
- rtsdtr_ctrl(info->MCR);
-
- if (info->tty)
- clear_bit(TTY_IO_ERROR, &info->tty->flags);
- info->xmit.head = info->xmit.tail = 0;
-
- /*
- * Set up the tty->alt_speed kludge
- */
- if (info->tty) {
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
- info->tty->alt_speed = 57600;
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
- info->tty->alt_speed = 115200;
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
- info->tty->alt_speed = 230400;
- if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
- info->tty->alt_speed = 460800;
- }
-
- /*
- * and set the speed of the serial port
- */
- change_speed(info, NULL);
-
- info->flags |= ASYNC_INITIALIZED;
- local_irq_restore(flags);
- return 0;
-
-errout:
- local_irq_restore(flags);
- return retval;
-}
-
-/*
- * This routine will shutdown a serial port; interrupts are disabled, and
- * DTR is dropped if the hangup on close termio flag is on.
- */
-static void shutdown(struct async_struct * info)
-{
- unsigned long flags;
- struct serial_state *state;
-
- if (!(info->flags & ASYNC_INITIALIZED))
- return;
-
- state = info->state;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("Shutting down serial port %d ....\n", info->line);
-#endif
-
- local_irq_save(flags); /* Disable interrupts */
-
- /*
- * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
- * here so the queue might never be waken up
- */
- wake_up_interruptible(&info->delta_msr_wait);
-
- IRQ_ports = NULL;
-
- /*
- * Free the IRQ, if necessary
- */
- free_irq(IRQ_AMIGA_VERTB, info);
-
- if (info->xmit.buf) {
- free_page((unsigned long) info->xmit.buf);
- info->xmit.buf = NULL;
- }
-
- info->IER = 0;
- custom.intena = IF_RBF | IF_TBE;
- mb();
-
- /* disable break condition */
- custom.adkcon = AC_UARTBRK;
- mb();
-
- if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
- info->MCR &= ~(SER_DTR|SER_RTS);
- rtsdtr_ctrl(info->MCR);
-
- if (info->tty)
- set_bit(TTY_IO_ERROR, &info->tty->flags);
-
- info->flags &= ~ASYNC_INITIALIZED;
- local_irq_restore(flags);
-}
-
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static void change_speed(struct async_struct *info,
- struct ktermios *old_termios)
-{
- int quot = 0, baud_base, baud;
- unsigned cflag, cval = 0;
- int bits;
- unsigned long flags;
-
- if (!info->tty || !info->tty->termios)
- return;
- cflag = info->tty->termios->c_cflag;
-
- /* Byte size is always 8 bits plus parity bit if requested */
-
- cval = 3; bits = 10;
- if (cflag & CSTOPB) {
- cval |= 0x04;
- bits++;
- }
- if (cflag & PARENB) {
- cval |= UART_LCR_PARITY;
- bits++;
- }
- if (!(cflag & PARODD))
- cval |= UART_LCR_EPAR;
-#ifdef CMSPAR
- if (cflag & CMSPAR)
- cval |= UART_LCR_SPAR;
-#endif
-
- /* Determine divisor based on baud rate */
- baud = tty_get_baud_rate(info->tty);
- if (!baud)
- baud = 9600; /* B0 transition handled in rs_set_termios */
- baud_base = info->state->baud_base;
- if (baud == 38400 &&
- ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST))
- quot = info->state->custom_divisor;
- else {
- if (baud == 134)
- /* Special case since 134 is really 134.5 */
- quot = (2*baud_base / 269);
- else if (baud)
- quot = baud_base / baud;
- }
- /* If the quotient is zero refuse the change */
- if (!quot && old_termios) {
- /* FIXME: Will need updating for new tty in the end */
- info->tty->termios->c_cflag &= ~CBAUD;
- info->tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD);
- baud = tty_get_baud_rate(info->tty);
- if (!baud)
- baud = 9600;
- if (baud == 38400 &&
- ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST))
- quot = info->state->custom_divisor;
- else {
- if (baud == 134)
- /* Special case since 134 is really 134.5 */
- quot = (2*baud_base / 269);
- else if (baud)
- quot = baud_base / baud;
- }
- }
- /* As a last resort, if the quotient is zero, default to 9600 bps */
- if (!quot)
- quot = baud_base / 9600;
- info->quot = quot;
- info->timeout = ((info->xmit_fifo_size*HZ*bits*quot) / baud_base);
- info->timeout += HZ/50; /* Add .02 seconds of slop */
-
- /* CTS flow control flag and modem status interrupts */
- info->IER &= ~UART_IER_MSI;
- if (info->flags & ASYNC_HARDPPS_CD)
- info->IER |= UART_IER_MSI;
- if (cflag & CRTSCTS) {
- info->flags |= ASYNC_CTS_FLOW;
- info->IER |= UART_IER_MSI;
- } else
- info->flags &= ~ASYNC_CTS_FLOW;
- if (cflag & CLOCAL)
- info->flags &= ~ASYNC_CHECK_CD;
- else {
- info->flags |= ASYNC_CHECK_CD;
- info->IER |= UART_IER_MSI;
- }
- /* TBD:
- * Does clearing IER_MSI imply that we should disable the VBL interrupt ?
- */
-
- /*
- * Set up parity check flag
- */
-
- info->read_status_mask = UART_LSR_OE | UART_LSR_DR;
- if (I_INPCK(info->tty))
- info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
- if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
- info->read_status_mask |= UART_LSR_BI;
-
- /*
- * Characters to ignore
- */
- info->ignore_status_mask = 0;
- if (I_IGNPAR(info->tty))
- info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
- if (I_IGNBRK(info->tty)) {
- info->ignore_status_mask |= UART_LSR_BI;
- /*
- * If we're ignore parity and break indicators, ignore
- * overruns too. (For real raw support).
- */
- if (I_IGNPAR(info->tty))
- info->ignore_status_mask |= UART_LSR_OE;
- }
- /*
- * !!! ignore all characters if CREAD is not set
- */
- if ((cflag & CREAD) == 0)
- info->ignore_status_mask |= UART_LSR_DR;
- local_irq_save(flags);
-
- {
- short serper;
-
- /* Set up the baud rate */
- serper = quot - 1;
-
- /* Enable or disable parity bit */
-
- if(cval & UART_LCR_PARITY)
- serper |= (SERPER_PARENB);
-
- custom.serper = serper;
- mb();
- }
-
- info->LCR = cval; /* Save LCR */
- local_irq_restore(flags);
-}
-
-static int rs_put_char(struct tty_struct *tty, unsigned char ch)
-{
- struct async_struct *info;
- unsigned long flags;
-
- info = tty->driver_data;
-
- if (serial_paranoia_check(info, tty->name, "rs_put_char"))
- return 0;
-
- if (!info->xmit.buf)
- return 0;
-
- local_irq_save(flags);
- if (CIRC_SPACE(info->xmit.head,
- info->xmit.tail,
- SERIAL_XMIT_SIZE) == 0) {
- local_irq_restore(flags);
- return 0;
- }
-
- info->xmit.buf[info->xmit.head++] = ch;
- info->xmit.head &= SERIAL_XMIT_SIZE-1;
- local_irq_restore(flags);
- return 1;
-}
-
-static void rs_flush_chars(struct tty_struct *tty)
-{
- struct async_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->name, "rs_flush_chars"))
- return;
-
- if (info->xmit.head == info->xmit.tail
- || tty->stopped
- || tty->hw_stopped
- || !info->xmit.buf)
- return;
-
- local_irq_save(flags);
- info->IER |= UART_IER_THRI;
- custom.intena = IF_SETCLR | IF_TBE;
- mb();
- /* set a pending Tx Interrupt, transmitter should restart now */
- custom.intreq = IF_SETCLR | IF_TBE;
- mb();
- local_irq_restore(flags);
-}
-
-static int rs_write(struct tty_struct * tty, const unsigned char *buf, int count)
-{
- int c, ret = 0;
- struct async_struct *info;
- unsigned long flags;
-
- info = tty->driver_data;
-
- if (serial_paranoia_check(info, tty->name, "rs_write"))
- return 0;
-
- if (!info->xmit.buf)
- return 0;
-
- local_irq_save(flags);
- while (1) {
- c = CIRC_SPACE_TO_END(info->xmit.head,
- info->xmit.tail,
- SERIAL_XMIT_SIZE);
- if (count < c)
- c = count;
- if (c <= 0) {
- break;
- }
- memcpy(info->xmit.buf + info->xmit.head, buf, c);
- info->xmit.head = ((info->xmit.head + c) &
- (SERIAL_XMIT_SIZE-1));
- buf += c;
- count -= c;
- ret += c;
- }
- local_irq_restore(flags);
-
- if (info->xmit.head != info->xmit.tail
- && !tty->stopped
- && !tty->hw_stopped
- && !(info->IER & UART_IER_THRI)) {
- info->IER |= UART_IER_THRI;
- local_irq_disable();
- custom.intena = IF_SETCLR | IF_TBE;
- mb();
- /* set a pending Tx Interrupt, transmitter should restart now */
- custom.intreq = IF_SETCLR | IF_TBE;
- mb();
- local_irq_restore(flags);
- }
- return ret;
-}
-
-static int rs_write_room(struct tty_struct *tty)
-{
- struct async_struct *info = tty->driver_data;
-
- if (serial_paranoia_check(info, tty->name, "rs_write_room"))
- return 0;
- return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
-}
-
-static int rs_chars_in_buffer(struct tty_struct *tty)
-{
- struct async_struct *info = tty->driver_data;
-
- if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
- return 0;
- return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
-}
-
-static void rs_flush_buffer(struct tty_struct *tty)
-{
- struct async_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
- return;
- local_irq_save(flags);
- info->xmit.head = info->xmit.tail = 0;
- local_irq_restore(flags);
- tty_wakeup(tty);
-}
-
-/*
- * This function is used to send a high-priority XON/XOFF character to
- * the device
- */
-static void rs_send_xchar(struct tty_struct *tty, char ch)
-{
- struct async_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->name, "rs_send_char"))
- return;
-
- info->x_char = ch;
- if (ch) {
- /* Make sure transmit interrupts are on */
-
- /* Check this ! */
- local_irq_save(flags);
- if(!(custom.intenar & IF_TBE)) {
- custom.intena = IF_SETCLR | IF_TBE;
- mb();
- /* set a pending Tx Interrupt, transmitter should restart now */
- custom.intreq = IF_SETCLR | IF_TBE;
- mb();
- }
- local_irq_restore(flags);
-
- info->IER |= UART_IER_THRI;
- }
-}
-
-/*
- * ------------------------------------------------------------
- * rs_throttle()
- *
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- * ------------------------------------------------------------
- */
-static void rs_throttle(struct tty_struct * tty)
-{
- struct async_struct *info = tty->driver_data;
- unsigned long flags;
-#ifdef SERIAL_DEBUG_THROTTLE
- char buf[64];
-
- printk("throttle %s: %d....\n", tty_name(tty, buf),
- tty->ldisc.chars_in_buffer(tty));
-#endif
-
- if (serial_paranoia_check(info, tty->name, "rs_throttle"))
- return;
-
- if (I_IXOFF(tty))
- rs_send_xchar(tty, STOP_CHAR(tty));
-
- if (tty->termios->c_cflag & CRTSCTS)
- info->MCR &= ~SER_RTS;
-
- local_irq_save(flags);
- rtsdtr_ctrl(info->MCR);
- local_irq_restore(flags);
-}
-
-static void rs_unthrottle(struct tty_struct * tty)
-{
- struct async_struct *info = tty->driver_data;
- unsigned long flags;
-#ifdef SERIAL_DEBUG_THROTTLE
- char buf[64];
-
- printk("unthrottle %s: %d....\n", tty_name(tty, buf),
- tty->ldisc.chars_in_buffer(tty));
-#endif
-
- if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
- return;
-
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else
- rs_send_xchar(tty, START_CHAR(tty));
- }
- if (tty->termios->c_cflag & CRTSCTS)
- info->MCR |= SER_RTS;
- local_irq_save(flags);
- rtsdtr_ctrl(info->MCR);
- local_irq_restore(flags);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-static int get_serial_info(struct async_struct * info,
- struct serial_struct __user * retinfo)
-{
- struct serial_struct tmp;
- struct serial_state *state = info->state;
-
- if (!retinfo)
- return -EFAULT;
- memset(&tmp, 0, sizeof(tmp));
- tty_lock();
- tmp.type = state->type;
- tmp.line = state->line;
- tmp.port = state->port;
- tmp.irq = state->irq;
- tmp.flags = state->flags;
- tmp.xmit_fifo_size = state->xmit_fifo_size;
- tmp.baud_base = state->baud_base;
- tmp.close_delay = state->close_delay;
- tmp.closing_wait = state->closing_wait;
- tmp.custom_divisor = state->custom_divisor;
- tty_unlock();
- if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
- return -EFAULT;
- return 0;
-}
-
-static int set_serial_info(struct async_struct * info,
- struct serial_struct __user * new_info)
-{
- struct serial_struct new_serial;
- struct serial_state old_state, *state;
- unsigned int change_irq,change_port;
- int retval = 0;
-
- if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
- return -EFAULT;
-
- tty_lock();
- state = info->state;
- old_state = *state;
-
- change_irq = new_serial.irq != state->irq;
- change_port = (new_serial.port != state->port);
- if(change_irq || change_port || (new_serial.xmit_fifo_size != state->xmit_fifo_size)) {
- tty_unlock();
- return -EINVAL;
- }
-
- if (!serial_isroot()) {
- if ((new_serial.baud_base != state->baud_base) ||
- (new_serial.close_delay != state->close_delay) ||
- (new_serial.xmit_fifo_size != state->xmit_fifo_size) ||
- ((new_serial.flags & ~ASYNC_USR_MASK) !=
- (state->flags & ~ASYNC_USR_MASK)))
- return -EPERM;
- state->flags = ((state->flags & ~ASYNC_USR_MASK) |
- (new_serial.flags & ASYNC_USR_MASK));
- info->flags = ((info->flags & ~ASYNC_USR_MASK) |
- (new_serial.flags & ASYNC_USR_MASK));
- state->custom_divisor = new_serial.custom_divisor;
- goto check_and_exit;
- }
-
- if (new_serial.baud_base < 9600) {
- tty_unlock();
- return -EINVAL;
- }
-
- /*
- * OK, past this point, all the error checking has been done.
- * At this point, we start making changes.....
- */
-
- state->baud_base = new_serial.baud_base;
- state->flags = ((state->flags & ~ASYNC_FLAGS) |
- (new_serial.flags & ASYNC_FLAGS));
- info->flags = ((state->flags & ~ASYNC_INTERNAL_FLAGS) |
- (info->flags & ASYNC_INTERNAL_FLAGS));
- state->custom_divisor = new_serial.custom_divisor;
- state->close_delay = new_serial.close_delay * HZ/100;
- state->closing_wait = new_serial.closing_wait * HZ/100;
- info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
-check_and_exit:
- if (info->flags & ASYNC_INITIALIZED) {
- if (((old_state.flags & ASYNC_SPD_MASK) !=
- (state->flags & ASYNC_SPD_MASK)) ||
- (old_state.custom_divisor != state->custom_divisor)) {
- if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
- info->tty->alt_speed = 57600;
- if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
- info->tty->alt_speed = 115200;
- if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
- info->tty->alt_speed = 230400;
- if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
- info->tty->alt_speed = 460800;
- change_speed(info, NULL);
- }
- } else
- retval = startup(info);
- tty_unlock();
- return retval;
-}
-
-
-/*
- * get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * is emptied. On bus types like RS485, the transmitter must
- * release the bus after transmitting. This must be done when
- * the transmit shift register is empty, not be done when the
- * transmit holding register is empty. This functionality
- * allows an RS485 driver to be written in user space.
- */
-static int get_lsr_info(struct async_struct * info, unsigned int __user *value)
-{
- unsigned char status;
- unsigned int result;
- unsigned long flags;
-
- local_irq_save(flags);
- status = custom.serdatr;
- mb();
- local_irq_restore(flags);
- result = ((status & SDR_TSRE) ? TIOCSER_TEMT : 0);
- if (copy_to_user(value, &result, sizeof(int)))
- return -EFAULT;
- return 0;
-}
-
-
-static int rs_tiocmget(struct tty_struct *tty)
-{
- struct async_struct * info = tty->driver_data;
- unsigned char control, status;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
- return -ENODEV;
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
-
- control = info->MCR;
- local_irq_save(flags);
- status = ciab.pra;
- local_irq_restore(flags);
- return ((control & SER_RTS) ? TIOCM_RTS : 0)
- | ((control & SER_DTR) ? TIOCM_DTR : 0)
- | (!(status & SER_DCD) ? TIOCM_CAR : 0)
- | (!(status & SER_DSR) ? TIOCM_DSR : 0)
- | (!(status & SER_CTS) ? TIOCM_CTS : 0);
-}
-
-static int rs_tiocmset(struct tty_struct *tty, unsigned int set,
- unsigned int clear)
-{
- struct async_struct * info = tty->driver_data;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
- return -ENODEV;
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
-
- local_irq_save(flags);
- if (set & TIOCM_RTS)
- info->MCR |= SER_RTS;
- if (set & TIOCM_DTR)
- info->MCR |= SER_DTR;
- if (clear & TIOCM_RTS)
- info->MCR &= ~SER_RTS;
- if (clear & TIOCM_DTR)
- info->MCR &= ~SER_DTR;
- rtsdtr_ctrl(info->MCR);
- local_irq_restore(flags);
- return 0;
-}
-
-/*
- * rs_break() --- routine which turns the break handling on or off
- */
-static int rs_break(struct tty_struct *tty, int break_state)
-{
- struct async_struct * info = tty->driver_data;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->name, "rs_break"))
- return -EINVAL;
-
- local_irq_save(flags);
- if (break_state == -1)
- custom.adkcon = AC_SETCLR | AC_UARTBRK;
- else
- custom.adkcon = AC_UARTBRK;
- mb();
- local_irq_restore(flags);
- return 0;
-}
-
-/*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
-static int rs_get_icount(struct tty_struct *tty,
- struct serial_icounter_struct *icount)
-{
- struct async_struct *info = tty->driver_data;
- struct async_icount cnow;
- unsigned long flags;
-
- local_irq_save(flags);
- cnow = info->state->icount;
- local_irq_restore(flags);
- icount->cts = cnow.cts;
- icount->dsr = cnow.dsr;
- icount->rng = cnow.rng;
- icount->dcd = cnow.dcd;
- icount->rx = cnow.rx;
- icount->tx = cnow.tx;
- icount->frame = cnow.frame;
- icount->overrun = cnow.overrun;
- icount->parity = cnow.parity;
- icount->brk = cnow.brk;
- icount->buf_overrun = cnow.buf_overrun;
-
- return 0;
-}
-
-static int rs_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct async_struct * info = tty->driver_data;
- struct async_icount cprev, cnow; /* kernel counter temps */
- void __user *argp = (void __user *)arg;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
- return -ENODEV;
-
- if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
- (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
- }
-
- switch (cmd) {
- case TIOCGSERIAL:
- return get_serial_info(info, argp);
- case TIOCSSERIAL:
- return set_serial_info(info, argp);
- case TIOCSERCONFIG:
- return 0;
-
- case TIOCSERGETLSR: /* Get line status register */
- return get_lsr_info(info, argp);
-
- case TIOCSERGSTRUCT:
- if (copy_to_user(argp,
- info, sizeof(struct async_struct)))
- return -EFAULT;
- return 0;
-
- /*
- * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
- * - mask passed in arg for lines of interest
- * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
- * Caller should use TIOCGICOUNT to see which one it was
- */
- case TIOCMIWAIT:
- local_irq_save(flags);
- /* note the counters on entry */
- cprev = info->state->icount;
- local_irq_restore(flags);
- while (1) {
- interruptible_sleep_on(&info->delta_msr_wait);
- /* see if a signal did it */
- if (signal_pending(current))
- return -ERESTARTSYS;
- local_irq_save(flags);
- cnow = info->state->icount; /* atomic copy */
- local_irq_restore(flags);
- if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
- cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
- return -EIO; /* no change => error */
- if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
- ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
- ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
- ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
- return 0;
- }
- cprev = cnow;
- }
- /* NOTREACHED */
-
- case TIOCSERGWILD:
- case TIOCSERSWILD:
- /* "setserial -W" is called in Debian boot */
- printk ("TIOCSER?WILD ioctl obsolete, ignored.\n");
- return 0;
-
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
-static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
-{
- struct async_struct *info = tty->driver_data;
- unsigned long flags;
- unsigned int cflag = tty->termios->c_cflag;
-
- change_speed(info, old_termios);
-
- /* Handle transition to B0 status */
- if ((old_termios->c_cflag & CBAUD) &&
- !(cflag & CBAUD)) {
- info->MCR &= ~(SER_DTR|SER_RTS);
- local_irq_save(flags);
- rtsdtr_ctrl(info->MCR);
- local_irq_restore(flags);
- }
-
- /* Handle transition away from B0 status */
- if (!(old_termios->c_cflag & CBAUD) &&
- (cflag & CBAUD)) {
- info->MCR |= SER_DTR;
- if (!(tty->termios->c_cflag & CRTSCTS) ||
- !test_bit(TTY_THROTTLED, &tty->flags)) {
- info->MCR |= SER_RTS;
- }
- local_irq_save(flags);
- rtsdtr_ctrl(info->MCR);
- local_irq_restore(flags);
- }
-
- /* Handle turning off CRTSCTS */
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- rs_start(tty);
- }
-
-#if 0
- /*
- * No need to wake up processes in open wait, since they
- * sample the CLOCAL flag once, and don't recheck it.
- * XXX It's not clear whether the current behavior is correct
- * or not. Hence, this may change.....
- */
- if (!(old_termios->c_cflag & CLOCAL) &&
- (tty->termios->c_cflag & CLOCAL))
- wake_up_interruptible(&info->open_wait);
-#endif
-}
-
-/*
- * ------------------------------------------------------------
- * rs_close()
- *
- * This routine is called when the serial port gets closed. First, we
- * wait for the last remaining data to be sent. Then, we unlink its
- * async structure from the interrupt chain if necessary, and we free
- * that IRQ if nothing is left in the chain.
- * ------------------------------------------------------------
- */
-static void rs_close(struct tty_struct *tty, struct file * filp)
-{
- struct async_struct * info = tty->driver_data;
- struct serial_state *state;
- unsigned long flags;
-
- if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
- return;
-
- state = info->state;
-
- local_irq_save(flags);
-
- if (tty_hung_up_p(filp)) {
- DBG_CNT("before DEC-hung");
- local_irq_restore(flags);
- return;
- }
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_close ttys%d, count = %d\n", info->line, state->count);
-#endif
- if ((tty->count == 1) && (state->count != 1)) {
- /*
- * Uh, oh. tty->count is 1, which means that the tty
- * structure will be freed. state->count should always
- * be one in these conditions. If it's greater than
- * one, we've got real problems, since it means the
- * serial port won't be shutdown.
- */
- printk("rs_close: bad serial port count; tty->count is 1, "
- "state->count is %d\n", state->count);
- state->count = 1;
- }
- if (--state->count < 0) {
- printk("rs_close: bad serial port count for ttys%d: %d\n",
- info->line, state->count);
- state->count = 0;
- }
- if (state->count) {
- DBG_CNT("before DEC-2");
- local_irq_restore(flags);
- return;
- }
- info->flags |= ASYNC_CLOSING;
- /*
- * Now we wait for the transmit buffer to clear; and we notify
- * the line discipline to only process XON/XOFF characters.
- */
- tty->closing = 1;
- if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent(tty, info->closing_wait);
- /*
- * At this point we stop accepting input. To do this, we
- * disable the receive line status interrupts, and tell the
- * interrupt driver to stop checking the data ready bit in the
- * line status register.
- */
- info->read_status_mask &= ~UART_LSR_DR;
- if (info->flags & ASYNC_INITIALIZED) {
- /* disable receive interrupts */
- custom.intena = IF_RBF;
- mb();
- /* clear any pending receive interrupt */
- custom.intreq = IF_RBF;
- mb();
-
- /*
- * Before we drop DTR, make sure the UART transmitter
- * has completely drained; this is especially
- * important if there is a transmit FIFO!
- */
- rs_wait_until_sent(tty, info->timeout);
- }
- shutdown(info);
- rs_flush_buffer(tty);
-
- tty_ldisc_flush(tty);
- tty->closing = 0;
- info->event = 0;
- info->tty = NULL;
- if (info->blocked_open) {
- if (info->close_delay) {
- msleep_interruptible(jiffies_to_msecs(info->close_delay));
- }
- wake_up_interruptible(&info->open_wait);
- }
- info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
- wake_up_interruptible(&info->close_wait);
- local_irq_restore(flags);
-}
-
-/*
- * rs_wait_until_sent() --- wait until the transmitter is empty
- */
-static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
-{
- struct async_struct * info = tty->driver_data;
- unsigned long orig_jiffies, char_time;
- int tty_was_locked = tty_locked();
- int lsr;
-
- if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
- return;
-
- if (info->xmit_fifo_size == 0)
- return; /* Just in case.... */
-
- orig_jiffies = jiffies;
-
- /*
- * tty_wait_until_sent is called from lots of places,
- * with or without the BTM.
- */
- if (!tty_was_locked)
- tty_lock();
- /*
- * Set the check interval to be 1/5 of the estimated time to
- * send a single character, and make it at least 1. The check
- * interval should also be less than the timeout.
- *
- * Note: we have to use pretty tight timings here to satisfy
- * the NIST-PCTS.
- */
- char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
- char_time = char_time / 5;
- if (char_time == 0)
- char_time = 1;
- if (timeout)
- char_time = min_t(unsigned long, char_time, timeout);
- /*
- * If the transmitter hasn't cleared in twice the approximate
- * amount of time to send the entire FIFO, it probably won't
- * ever clear. This assumes the UART isn't doing flow
- * control, which is currently the case. Hence, if it ever
- * takes longer than info->timeout, this is probably due to a
- * UART bug of some kind. So, we clamp the timeout parameter at
- * 2*info->timeout.
- */
- if (!timeout || timeout > 2*info->timeout)
- timeout = 2*info->timeout;
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
- printk("jiff=%lu...", jiffies);
-#endif
- while(!((lsr = custom.serdatr) & SDR_TSRE)) {
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("serdatr = %d (jiff=%lu)...", lsr, jiffies);
-#endif
- msleep_interruptible(jiffies_to_msecs(char_time));
- if (signal_pending(current))
- break;
- if (timeout && time_after(jiffies, orig_jiffies + timeout))
- break;
- }
- __set_current_state(TASK_RUNNING);
- if (!tty_was_locked)
- tty_unlock();
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
-#endif
-}
-
-/*
- * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
-static void rs_hangup(struct tty_struct *tty)
-{
- struct async_struct * info = tty->driver_data;
- struct serial_state *state = info->state;
-
- if (serial_paranoia_check(info, tty->name, "rs_hangup"))
- return;
-
- state = info->state;
-
- rs_flush_buffer(tty);
- shutdown(info);
- info->event = 0;
- state->count = 0;
- info->flags &= ~ASYNC_NORMAL_ACTIVE;
- info->tty = NULL;
- wake_up_interruptible(&info->open_wait);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_open() and friends
- * ------------------------------------------------------------
- */
-static int block_til_ready(struct tty_struct *tty, struct file * filp,
- struct async_struct *info)
-{
-#ifdef DECLARE_WAITQUEUE
- DECLARE_WAITQUEUE(wait, current);
-#else
- struct wait_queue wait = { current, NULL };
-#endif
- struct serial_state *state = info->state;
- int retval;
- int do_clocal = 0, extra_count = 0;
- unsigned long flags;
-
- /*
- * If the device is in the middle of being closed, then block
- * until it's done, and then try again.
- */
- if (tty_hung_up_p(filp) ||
- (info->flags & ASYNC_CLOSING)) {
- if (info->flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->close_wait);
-#ifdef SERIAL_DO_RESTART
- return ((info->flags & ASYNC_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS);
-#else
- return -EAGAIN;
-#endif
- }
-
- /*
- * If non-blocking mode is set, or the port is not enabled,
- * then make the check up front and then exit.
- */
- if ((filp->f_flags & O_NONBLOCK) ||
- (tty->flags & (1 << TTY_IO_ERROR))) {
- info->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
- }
-
- if (tty->termios->c_cflag & CLOCAL)
- do_clocal = 1;
-
- /*
- * Block waiting for the carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, state->count is dropped by one, so that
- * rs_close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
- retval = 0;
- add_wait_queue(&info->open_wait, &wait);
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready before block: ttys%d, count = %d\n",
- state->line, state->count);
-#endif
- local_irq_save(flags);
- if (!tty_hung_up_p(filp)) {
- extra_count = 1;
- state->count--;
- }
- local_irq_restore(flags);
- info->blocked_open++;
- while (1) {
- local_irq_save(flags);
- if (tty->termios->c_cflag & CBAUD)
- rtsdtr_ctrl(SER_DTR|SER_RTS);
- local_irq_restore(flags);
- set_current_state(TASK_INTERRUPTIBLE);
- if (tty_hung_up_p(filp) ||
- !(info->flags & ASYNC_INITIALIZED)) {
-#ifdef SERIAL_DO_RESTART
- if (info->flags & ASYNC_HUP_NOTIFY)
- retval = -EAGAIN;
- else
- retval = -ERESTARTSYS;
-#else
- retval = -EAGAIN;
-#endif
- break;
- }
- if (!(info->flags & ASYNC_CLOSING) &&
- (do_clocal || (!(ciab.pra & SER_DCD)) ))
- break;
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready blocking: ttys%d, count = %d\n",
- info->line, state->count);
-#endif
- tty_unlock();
- schedule();
- tty_lock();
- }
- __set_current_state(TASK_RUNNING);
- remove_wait_queue(&info->open_wait, &wait);
- if (extra_count)
- state->count++;
- info->blocked_open--;
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready after blocking: ttys%d, count = %d\n",
- info->line, state->count);
-#endif
- if (retval)
- return retval;
- info->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
-}
-
-static int get_async_struct(int line, struct async_struct **ret_info)
-{
- struct async_struct *info;
- struct serial_state *sstate;
-
- sstate = rs_table + line;
- sstate->count++;
- if (sstate->info) {
- *ret_info = sstate->info;
- return 0;
- }
- info = kzalloc(sizeof(struct async_struct), GFP_KERNEL);
- if (!info) {
- sstate->count--;
- return -ENOMEM;
- }
-#ifdef DECLARE_WAITQUEUE
- init_waitqueue_head(&info->open_wait);
- init_waitqueue_head(&info->close_wait);
- init_waitqueue_head(&info->delta_msr_wait);
-#endif
- info->magic = SERIAL_MAGIC;
- info->port = sstate->port;
- info->flags = sstate->flags;
- info->xmit_fifo_size = sstate->xmit_fifo_size;
- info->line = line;
- tasklet_init(&info->tlet, do_softint, (unsigned long)info);
- info->state = sstate;
- if (sstate->info) {
- kfree(info);
- *ret_info = sstate->info;
- return 0;
- }
- *ret_info = sstate->info = info;
- return 0;
-}
-
-/*
- * This routine is called whenever a serial port is opened. It
- * enables interrupts for a serial port, linking in its async structure into
- * the IRQ chain. It also performs the serial-specific
- * initialization for the tty structure.
- */
-static int rs_open(struct tty_struct *tty, struct file * filp)
-{
- struct async_struct *info;
- int retval, line;
-
- line = tty->index;
- if ((line < 0) || (line >= NR_PORTS)) {
- return -ENODEV;
- }
- retval = get_async_struct(line, &info);
- if (retval) {
- return retval;
- }
- tty->driver_data = info;
- info->tty = tty;
- if (serial_paranoia_check(info, tty->name, "rs_open"))
- return -ENODEV;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open %s, count = %d\n", tty->name, info->state->count);
-#endif
- info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
- /*
- * If the port is the middle of closing, bail out now
- */
- if (tty_hung_up_p(filp) ||
- (info->flags & ASYNC_CLOSING)) {
- if (info->flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->close_wait);
-#ifdef SERIAL_DO_RESTART
- return ((info->flags & ASYNC_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS);
-#else
- return -EAGAIN;
-#endif
- }
-
- /*
- * Start up serial port
- */
- retval = startup(info);
- if (retval) {
- return retval;
- }
-
- retval = block_til_ready(tty, filp, info);
- if (retval) {
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open returning after block_til_ready with %d\n",
- retval);
-#endif
- return retval;
- }
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open %s successful...", tty->name);
-#endif
- return 0;
-}
-
-/*
- * /proc fs routines....
- */
-
-static inline void line_info(struct seq_file *m, struct serial_state *state)
-{
- struct async_struct *info = state->info, scr_info;
- char stat_buf[30], control, status;
- unsigned long flags;
-
- seq_printf(m, "%d: uart:amiga_builtin",state->line);
-
- /*
- * Figure out the current RS-232 lines
- */
- if (!info) {
- info = &scr_info; /* This is just for serial_{in,out} */
-
- info->magic = SERIAL_MAGIC;
- info->flags = state->flags;
- info->quot = 0;
- info->tty = NULL;
- }
- local_irq_save(flags);
- status = ciab.pra;
- control = info ? info->MCR : status;
- local_irq_restore(flags);
-
- stat_buf[0] = 0;
- stat_buf[1] = 0;
- if(!(control & SER_RTS))
- strcat(stat_buf, "|RTS");
- if(!(status & SER_CTS))
- strcat(stat_buf, "|CTS");
- if(!(control & SER_DTR))
- strcat(stat_buf, "|DTR");
- if(!(status & SER_DSR))
- strcat(stat_buf, "|DSR");
- if(!(status & SER_DCD))
- strcat(stat_buf, "|CD");
-
- if (info->quot) {
- seq_printf(m, " baud:%d", state->baud_base / info->quot);
- }
-
- seq_printf(m, " tx:%d rx:%d", state->icount.tx, state->icount.rx);
-
- if (state->icount.frame)
- seq_printf(m, " fe:%d", state->icount.frame);
-
- if (state->icount.parity)
- seq_printf(m, " pe:%d", state->icount.parity);
-
- if (state->icount.brk)
- seq_printf(m, " brk:%d", state->icount.brk);
-
- if (state->icount.overrun)
- seq_printf(m, " oe:%d", state->icount.overrun);
-
- /*
- * Last thing is the RS-232 status lines
- */
- seq_printf(m, " %s\n", stat_buf+1);
-}
-
-static int rs_proc_show(struct seq_file *m, void *v)
-{
- seq_printf(m, "serinfo:1.0 driver:%s\n", serial_version);
- line_info(m, &rs_table[0]);
- return 0;
-}
-
-static int rs_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, rs_proc_show, NULL);
-}
-
-static const struct file_operations rs_proc_fops = {
- .owner = THIS_MODULE,
- .open = rs_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-/*
- * ---------------------------------------------------------------------
- * rs_init() and friends
- *
- * rs_init() is called at boot-time to initialize the serial driver.
- * ---------------------------------------------------------------------
- */
-
-/*
- * This routine prints out the appropriate serial driver version
- * number, and identifies which options were configured into this
- * driver.
- */
-static void show_serial_version(void)
-{
- printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
-}
-
-
-static const struct tty_operations serial_ops = {
- .open = rs_open,
- .close = rs_close,
- .write = rs_write,
- .put_char = rs_put_char,
- .flush_chars = rs_flush_chars,
- .write_room = rs_write_room,
- .chars_in_buffer = rs_chars_in_buffer,
- .flush_buffer = rs_flush_buffer,
- .ioctl = rs_ioctl,
- .throttle = rs_throttle,
- .unthrottle = rs_unthrottle,
- .set_termios = rs_set_termios,
- .stop = rs_stop,
- .start = rs_start,
- .hangup = rs_hangup,
- .break_ctl = rs_break,
- .send_xchar = rs_send_xchar,
- .wait_until_sent = rs_wait_until_sent,
- .tiocmget = rs_tiocmget,
- .tiocmset = rs_tiocmset,
- .get_icount = rs_get_icount,
- .proc_fops = &rs_proc_fops,
-};
-
-/*
- * The serial driver boot-time initialization code!
- */
-static int __init amiga_serial_probe(struct platform_device *pdev)
-{
- unsigned long flags;
- struct serial_state * state;
- int error;
-
- serial_driver = alloc_tty_driver(1);
- if (!serial_driver)
- return -ENOMEM;
-
- IRQ_ports = NULL;
-
- show_serial_version();
-
- /* Initialize the tty_driver structure */
-
- serial_driver->owner = THIS_MODULE;
- serial_driver->driver_name = "amiserial";
- serial_driver->name = "ttyS";
- serial_driver->major = TTY_MAJOR;
- serial_driver->minor_start = 64;
- serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
- serial_driver->subtype = SERIAL_TYPE_NORMAL;
- serial_driver->init_termios = tty_std_termios;
- serial_driver->init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- serial_driver->flags = TTY_DRIVER_REAL_RAW;
- tty_set_operations(serial_driver, &serial_ops);
-
- error = tty_register_driver(serial_driver);
- if (error)
- goto fail_put_tty_driver;
-
- state = rs_table;
- state->magic = SSTATE_MAGIC;
- state->port = (int)&custom.serdatr; /* Just to give it a value */
- state->line = 0;
- state->custom_divisor = 0;
- state->close_delay = 5*HZ/10;
- state->closing_wait = 30*HZ;
- state->icount.cts = state->icount.dsr =
- state->icount.rng = state->icount.dcd = 0;
- state->icount.rx = state->icount.tx = 0;
- state->icount.frame = state->icount.parity = 0;
- state->icount.overrun = state->icount.brk = 0;
-
- printk(KERN_INFO "ttyS%d is the amiga builtin serial port\n",
- state->line);
-
- /* Hardware set up */
-
- state->baud_base = amiga_colorclock;
- state->xmit_fifo_size = 1;
-
- /* set ISRs, and then disable the rx interrupts */
- error = request_irq(IRQ_AMIGA_TBE, ser_tx_int, 0, "serial TX", state);
- if (error)
- goto fail_unregister;
-
- error = request_irq(IRQ_AMIGA_RBF, ser_rx_int, IRQF_DISABLED,
- "serial RX", state);
- if (error)
- goto fail_free_irq;
-
- local_irq_save(flags);
-
- /* turn off Rx and Tx interrupts */
- custom.intena = IF_RBF | IF_TBE;
- mb();
-
- /* clear any pending interrupt */
- custom.intreq = IF_RBF | IF_TBE;
- mb();
-
- local_irq_restore(flags);
-
- /*
- * set the appropriate directions for the modem control flags,
- * and clear RTS and DTR
- */
- ciab.ddra |= (SER_DTR | SER_RTS); /* outputs */
- ciab.ddra &= ~(SER_DCD | SER_CTS | SER_DSR); /* inputs */
-
- platform_set_drvdata(pdev, state);
-
- return 0;
-
-fail_free_irq:
- free_irq(IRQ_AMIGA_TBE, state);
-fail_unregister:
- tty_unregister_driver(serial_driver);
-fail_put_tty_driver:
- put_tty_driver(serial_driver);
- return error;
-}
-
-static int __exit amiga_serial_remove(struct platform_device *pdev)
-{
- int error;
- struct serial_state *state = platform_get_drvdata(pdev);
- struct async_struct *info = state->info;
-
- /* printk("Unloading %s: version %s\n", serial_name, serial_version); */
- tasklet_kill(&info->tlet);
- if ((error = tty_unregister_driver(serial_driver)))
- printk("SERIAL: failed to unregister serial driver (%d)\n",
- error);
- put_tty_driver(serial_driver);
-
- rs_table[0].info = NULL;
- kfree(info);
-
- free_irq(IRQ_AMIGA_TBE, rs_table);
- free_irq(IRQ_AMIGA_RBF, rs_table);
-
- platform_set_drvdata(pdev, NULL);
-
- return error;
-}
-
-static struct platform_driver amiga_serial_driver = {
- .remove = __exit_p(amiga_serial_remove),
- .driver = {
- .name = "amiga-serial",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init amiga_serial_init(void)
-{
- return platform_driver_probe(&amiga_serial_driver, amiga_serial_probe);
-}
-
-module_init(amiga_serial_init);
-
-static void __exit amiga_serial_exit(void)
-{
- platform_driver_unregister(&amiga_serial_driver);
-}
-
-module_exit(amiga_serial_exit);
-
-
-#if defined(CONFIG_SERIAL_CONSOLE) && !defined(MODULE)
-
-/*
- * ------------------------------------------------------------
- * Serial console driver
- * ------------------------------------------------------------
- */
-
-static void amiga_serial_putc(char c)
-{
- custom.serdat = (unsigned char)c | 0x100;
- while (!(custom.serdatr & 0x2000))
- barrier();
-}
-
-/*
- * Print a string to the serial port trying not to disturb
- * any possible real use of the port...
- *
- * The console must be locked when we get here.
- */
-static void serial_console_write(struct console *co, const char *s,
- unsigned count)
-{
- unsigned short intena = custom.intenar;
-
- custom.intena = IF_TBE;
-
- while (count--) {
- if (*s == '\n')
- amiga_serial_putc('\r');
- amiga_serial_putc(*s++);
- }
-
- custom.intena = IF_SETCLR | (intena & IF_TBE);
-}
-
-static struct tty_driver *serial_console_device(struct console *c, int *index)
-{
- *index = 0;
- return serial_driver;
-}
-
-static struct console sercons = {
- .name = "ttyS",
- .write = serial_console_write,
- .device = serial_console_device,
- .flags = CON_PRINTBUFFER,
- .index = -1,
-};
-
-/*
- * Register console.
- */
-static int __init amiserial_console_init(void)
-{
- register_console(&sercons);
- return 0;
-}
-console_initcall(amiserial_console_init);
-
-#endif /* CONFIG_SERIAL_CONSOLE && !MODULE */
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:amiga-serial");
+++ /dev/null
-/*
- * TTY over Blackfin JTAG Communication
- *
- * Copyright 2008-2009 Analog Devices Inc.
- *
- * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
- */
-
-#define DRV_NAME "bfin-jtag-comm"
-#define DEV_NAME "ttyBFJC"
-#define pr_fmt(fmt) DRV_NAME ": " fmt
-
-#include <linux/circ_buf.h>
-#include <linux/console.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/kthread.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/tty.h>
-#include <linux/tty_driver.h>
-#include <linux/tty_flip.h>
-#include <asm/atomic.h>
-
-#define pr_init(fmt, args...) ({ static const __initconst char __fmt[] = fmt; printk(__fmt, ## args); })
-
-/* See the Debug/Emulation chapter in the HRM */
-#define EMUDOF 0x00000001 /* EMUDAT_OUT full & valid */
-#define EMUDIF 0x00000002 /* EMUDAT_IN full & valid */
-#define EMUDOOVF 0x00000004 /* EMUDAT_OUT overflow */
-#define EMUDIOVF 0x00000008 /* EMUDAT_IN overflow */
-
-static inline uint32_t bfin_write_emudat(uint32_t emudat)
-{
- __asm__ __volatile__("emudat = %0;" : : "d"(emudat));
- return emudat;
-}
-
-static inline uint32_t bfin_read_emudat(void)
-{
- uint32_t emudat;
- __asm__ __volatile__("%0 = emudat;" : "=d"(emudat));
- return emudat;
-}
-
-static inline uint32_t bfin_write_emudat_chars(char a, char b, char c, char d)
-{
- return bfin_write_emudat((a << 0) | (b << 8) | (c << 16) | (d << 24));
-}
-
-#define CIRC_SIZE 2048 /* see comment in tty_io.c:do_tty_write() */
-#define CIRC_MASK (CIRC_SIZE - 1)
-#define circ_empty(circ) ((circ)->head == (circ)->tail)
-#define circ_free(circ) CIRC_SPACE((circ)->head, (circ)->tail, CIRC_SIZE)
-#define circ_cnt(circ) CIRC_CNT((circ)->head, (circ)->tail, CIRC_SIZE)
-#define circ_byte(circ, idx) ((circ)->buf[(idx) & CIRC_MASK])
-
-static struct tty_driver *bfin_jc_driver;
-static struct task_struct *bfin_jc_kthread;
-static struct tty_struct * volatile bfin_jc_tty;
-static unsigned long bfin_jc_count;
-static DEFINE_MUTEX(bfin_jc_tty_mutex);
-static volatile struct circ_buf bfin_jc_write_buf;
-
-static int
-bfin_jc_emudat_manager(void *arg)
-{
- uint32_t inbound_len = 0, outbound_len = 0;
-
- while (!kthread_should_stop()) {
- /* no one left to give data to, so sleep */
- if (bfin_jc_tty == NULL && circ_empty(&bfin_jc_write_buf)) {
- pr_debug("waiting for readers\n");
- __set_current_state(TASK_UNINTERRUPTIBLE);
- schedule();
- __set_current_state(TASK_RUNNING);
- }
-
- /* no data available, so just chill */
- if (!(bfin_read_DBGSTAT() & EMUDIF) && circ_empty(&bfin_jc_write_buf)) {
- pr_debug("waiting for data (in_len = %i) (circ: %i %i)\n",
- inbound_len, bfin_jc_write_buf.tail, bfin_jc_write_buf.head);
- if (inbound_len)
- schedule();
- else
- schedule_timeout_interruptible(HZ);
- continue;
- }
-
- /* if incoming data is ready, eat it */
- if (bfin_read_DBGSTAT() & EMUDIF) {
- struct tty_struct *tty;
- mutex_lock(&bfin_jc_tty_mutex);
- tty = (struct tty_struct *)bfin_jc_tty;
- if (tty != NULL) {
- uint32_t emudat = bfin_read_emudat();
- if (inbound_len == 0) {
- pr_debug("incoming length: 0x%08x\n", emudat);
- inbound_len = emudat;
- } else {
- size_t num_chars = (4 <= inbound_len ? 4 : inbound_len);
- pr_debug(" incoming data: 0x%08x (pushing %zu)\n", emudat, num_chars);
- inbound_len -= num_chars;
- tty_insert_flip_string(tty, (unsigned char *)&emudat, num_chars);
- tty_flip_buffer_push(tty);
- }
- }
- mutex_unlock(&bfin_jc_tty_mutex);
- }
-
- /* if outgoing data is ready, post it */
- if (!(bfin_read_DBGSTAT() & EMUDOF) && !circ_empty(&bfin_jc_write_buf)) {
- if (outbound_len == 0) {
- outbound_len = circ_cnt(&bfin_jc_write_buf);
- bfin_write_emudat(outbound_len);
- pr_debug("outgoing length: 0x%08x\n", outbound_len);
- } else {
- struct tty_struct *tty;
- int tail = bfin_jc_write_buf.tail;
- size_t ate = (4 <= outbound_len ? 4 : outbound_len);
- uint32_t emudat =
- bfin_write_emudat_chars(
- circ_byte(&bfin_jc_write_buf, tail + 0),
- circ_byte(&bfin_jc_write_buf, tail + 1),
- circ_byte(&bfin_jc_write_buf, tail + 2),
- circ_byte(&bfin_jc_write_buf, tail + 3)
- );
- bfin_jc_write_buf.tail += ate;
- outbound_len -= ate;
- mutex_lock(&bfin_jc_tty_mutex);
- tty = (struct tty_struct *)bfin_jc_tty;
- if (tty)
- tty_wakeup(tty);
- mutex_unlock(&bfin_jc_tty_mutex);
- pr_debug(" outgoing data: 0x%08x (pushing %zu)\n", emudat, ate);
- }
- }
- }
-
- __set_current_state(TASK_RUNNING);
- return 0;
-}
-
-static int
-bfin_jc_open(struct tty_struct *tty, struct file *filp)
-{
- mutex_lock(&bfin_jc_tty_mutex);
- pr_debug("open %lu\n", bfin_jc_count);
- ++bfin_jc_count;
- bfin_jc_tty = tty;
- wake_up_process(bfin_jc_kthread);
- mutex_unlock(&bfin_jc_tty_mutex);
- return 0;
-}
-
-static void
-bfin_jc_close(struct tty_struct *tty, struct file *filp)
-{
- mutex_lock(&bfin_jc_tty_mutex);
- pr_debug("close %lu\n", bfin_jc_count);
- if (--bfin_jc_count == 0)
- bfin_jc_tty = NULL;
- wake_up_process(bfin_jc_kthread);
- mutex_unlock(&bfin_jc_tty_mutex);
-}
-
-/* XXX: we dont handle the put_char() case where we must handle count = 1 */
-static int
-bfin_jc_circ_write(const unsigned char *buf, int count)
-{
- int i;
- count = min(count, circ_free(&bfin_jc_write_buf));
- pr_debug("going to write chunk of %i bytes\n", count);
- for (i = 0; i < count; ++i)
- circ_byte(&bfin_jc_write_buf, bfin_jc_write_buf.head + i) = buf[i];
- bfin_jc_write_buf.head += i;
- return i;
-}
-
-#ifndef CONFIG_BFIN_JTAG_COMM_CONSOLE
-# define console_lock()
-# define console_unlock()
-#endif
-static int
-bfin_jc_write(struct tty_struct *tty, const unsigned char *buf, int count)
-{
- int i;
- console_lock();
- i = bfin_jc_circ_write(buf, count);
- console_unlock();
- wake_up_process(bfin_jc_kthread);
- return i;
-}
-
-static void
-bfin_jc_flush_chars(struct tty_struct *tty)
-{
- wake_up_process(bfin_jc_kthread);
-}
-
-static int
-bfin_jc_write_room(struct tty_struct *tty)
-{
- return circ_free(&bfin_jc_write_buf);
-}
-
-static int
-bfin_jc_chars_in_buffer(struct tty_struct *tty)
-{
- return circ_cnt(&bfin_jc_write_buf);
-}
-
-static void
-bfin_jc_wait_until_sent(struct tty_struct *tty, int timeout)
-{
- unsigned long expire = jiffies + timeout;
- while (!circ_empty(&bfin_jc_write_buf)) {
- if (signal_pending(current))
- break;
- if (time_after(jiffies, expire))
- break;
- }
-}
-
-static const struct tty_operations bfin_jc_ops = {
- .open = bfin_jc_open,
- .close = bfin_jc_close,
- .write = bfin_jc_write,
- /*.put_char = bfin_jc_put_char,*/
- .flush_chars = bfin_jc_flush_chars,
- .write_room = bfin_jc_write_room,
- .chars_in_buffer = bfin_jc_chars_in_buffer,
- .wait_until_sent = bfin_jc_wait_until_sent,
-};
-
-static int __init bfin_jc_init(void)
-{
- int ret;
-
- bfin_jc_kthread = kthread_create(bfin_jc_emudat_manager, NULL, DRV_NAME);
- if (IS_ERR(bfin_jc_kthread))
- return PTR_ERR(bfin_jc_kthread);
-
- ret = -ENOMEM;
-
- bfin_jc_write_buf.head = bfin_jc_write_buf.tail = 0;
- bfin_jc_write_buf.buf = kmalloc(CIRC_SIZE, GFP_KERNEL);
- if (!bfin_jc_write_buf.buf)
- goto err;
-
- bfin_jc_driver = alloc_tty_driver(1);
- if (!bfin_jc_driver)
- goto err;
-
- bfin_jc_driver->owner = THIS_MODULE;
- bfin_jc_driver->driver_name = DRV_NAME;
- bfin_jc_driver->name = DEV_NAME;
- bfin_jc_driver->type = TTY_DRIVER_TYPE_SERIAL;
- bfin_jc_driver->subtype = SERIAL_TYPE_NORMAL;
- bfin_jc_driver->init_termios = tty_std_termios;
- tty_set_operations(bfin_jc_driver, &bfin_jc_ops);
-
- ret = tty_register_driver(bfin_jc_driver);
- if (ret)
- goto err;
-
- pr_init(KERN_INFO DRV_NAME ": initialized\n");
-
- return 0;
-
- err:
- put_tty_driver(bfin_jc_driver);
- kfree(bfin_jc_write_buf.buf);
- kthread_stop(bfin_jc_kthread);
- return ret;
-}
-module_init(bfin_jc_init);
-
-static void __exit bfin_jc_exit(void)
-{
- kthread_stop(bfin_jc_kthread);
- kfree(bfin_jc_write_buf.buf);
- tty_unregister_driver(bfin_jc_driver);
- put_tty_driver(bfin_jc_driver);
-}
-module_exit(bfin_jc_exit);
-
-#if defined(CONFIG_BFIN_JTAG_COMM_CONSOLE) || defined(CONFIG_EARLY_PRINTK)
-static void
-bfin_jc_straight_buffer_write(const char *buf, unsigned count)
-{
- unsigned ate = 0;
- while (bfin_read_DBGSTAT() & EMUDOF)
- continue;
- bfin_write_emudat(count);
- while (ate < count) {
- while (bfin_read_DBGSTAT() & EMUDOF)
- continue;
- bfin_write_emudat_chars(buf[ate], buf[ate+1], buf[ate+2], buf[ate+3]);
- ate += 4;
- }
-}
-#endif
-
-#ifdef CONFIG_BFIN_JTAG_COMM_CONSOLE
-static void
-bfin_jc_console_write(struct console *co, const char *buf, unsigned count)
-{
- if (bfin_jc_kthread == NULL)
- bfin_jc_straight_buffer_write(buf, count);
- else
- bfin_jc_circ_write(buf, count);
-}
-
-static struct tty_driver *
-bfin_jc_console_device(struct console *co, int *index)
-{
- *index = co->index;
- return bfin_jc_driver;
-}
-
-static struct console bfin_jc_console = {
- .name = DEV_NAME,
- .write = bfin_jc_console_write,
- .device = bfin_jc_console_device,
- .flags = CON_ANYTIME | CON_PRINTBUFFER,
- .index = -1,
-};
-
-static int __init bfin_jc_console_init(void)
-{
- register_console(&bfin_jc_console);
- return 0;
-}
-console_initcall(bfin_jc_console_init);
-#endif
-
-#ifdef CONFIG_EARLY_PRINTK
-static void __init
-bfin_jc_early_write(struct console *co, const char *buf, unsigned int count)
-{
- bfin_jc_straight_buffer_write(buf, count);
-}
-
-static struct __initdata console bfin_jc_early_console = {
- .name = "early_BFJC",
- .write = bfin_jc_early_write,
- .flags = CON_ANYTIME | CON_PRINTBUFFER,
- .index = -1,
-};
-
-struct console * __init
-bfin_jc_early_init(unsigned int port, unsigned int cflag)
-{
- return &bfin_jc_early_console;
-}
-#endif
-
-MODULE_AUTHOR("Mike Frysinger <vapier@gentoo.org>");
-MODULE_DESCRIPTION("TTY over Blackfin JTAG Communication");
-MODULE_LICENSE("GPL");
+++ /dev/null
-#undef BLOCKMOVE
-#define Z_WAKE
-#undef Z_EXT_CHARS_IN_BUFFER
-
-/*
- * linux/drivers/char/cyclades.c
- *
- * This file contains the driver for the Cyclades async multiport
- * serial boards.
- *
- * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
- * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
- *
- * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
- *
- * Much of the design and some of the code came from serial.c
- * which was copyright (C) 1991, 1992 Linus Torvalds. It was
- * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
- * and then fixed as suggested by Michael K. Johnson 12/12/92.
- * Converted to pci probing and cleaned up by Jiri Slaby.
- *
- */
-
-#define CY_VERSION "2.6"
-
-/* If you need to install more boards than NR_CARDS, change the constant
- in the definition below. No other change is necessary to support up to
- eight boards. Beyond that you'll have to extend cy_isa_addresses. */
-
-#define NR_CARDS 4
-
-/*
- If the total number of ports is larger than NR_PORTS, change this
- constant in the definition below. No other change is necessary to
- support more boards/ports. */
-
-#define NR_PORTS 256
-
-#define ZO_V1 0
-#define ZO_V2 1
-#define ZE_V1 2
-
-#define SERIAL_PARANOIA_CHECK
-#undef CY_DEBUG_OPEN
-#undef CY_DEBUG_THROTTLE
-#undef CY_DEBUG_OTHER
-#undef CY_DEBUG_IO
-#undef CY_DEBUG_COUNT
-#undef CY_DEBUG_DTR
-#undef CY_DEBUG_WAIT_UNTIL_SENT
-#undef CY_DEBUG_INTERRUPTS
-#undef CY_16Y_HACK
-#undef CY_ENABLE_MONITORING
-#undef CY_PCI_DEBUG
-
-/*
- * Include section
- */
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/cyclades.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/spinlock.h>
-#include <linux/bitops.h>
-#include <linux/firmware.h>
-#include <linux/device.h>
-#include <linux/slab.h>
-
-#include <linux/io.h>
-#include <linux/uaccess.h>
-
-#include <linux/kernel.h>
-#include <linux/pci.h>
-
-#include <linux/stat.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-
-static void cy_send_xchar(struct tty_struct *tty, char ch);
-
-#ifndef SERIAL_XMIT_SIZE
-#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
-#endif
-
-#define STD_COM_FLAGS (0)
-
-/* firmware stuff */
-#define ZL_MAX_BLOCKS 16
-#define DRIVER_VERSION 0x02010203
-#define RAM_SIZE 0x80000
-
-enum zblock_type {
- ZBLOCK_PRG = 0,
- ZBLOCK_FPGA = 1
-};
-
-struct zfile_header {
- char name[64];
- char date[32];
- char aux[32];
- u32 n_config;
- u32 config_offset;
- u32 n_blocks;
- u32 block_offset;
- u32 reserved[9];
-} __attribute__ ((packed));
-
-struct zfile_config {
- char name[64];
- u32 mailbox;
- u32 function;
- u32 n_blocks;
- u32 block_list[ZL_MAX_BLOCKS];
-} __attribute__ ((packed));
-
-struct zfile_block {
- u32 type;
- u32 file_offset;
- u32 ram_offset;
- u32 size;
-} __attribute__ ((packed));
-
-static struct tty_driver *cy_serial_driver;
-
-#ifdef CONFIG_ISA
-/* This is the address lookup table. The driver will probe for
- Cyclom-Y/ISA boards at all addresses in here. If you want the
- driver to probe addresses at a different address, add it to
- this table. If the driver is probing some other board and
- causing problems, remove the offending address from this table.
-*/
-
-static unsigned int cy_isa_addresses[] = {
- 0xD0000,
- 0xD2000,
- 0xD4000,
- 0xD6000,
- 0xD8000,
- 0xDA000,
- 0xDC000,
- 0xDE000,
- 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
-
-static long maddr[NR_CARDS];
-static int irq[NR_CARDS];
-
-module_param_array(maddr, long, NULL, 0);
-module_param_array(irq, int, NULL, 0);
-
-#endif /* CONFIG_ISA */
-
-/* This is the per-card data structure containing address, irq, number of
- channels, etc. This driver supports a maximum of NR_CARDS cards.
-*/
-static struct cyclades_card cy_card[NR_CARDS];
-
-static int cy_next_channel; /* next minor available */
-
-/*
- * This is used to look up the divisor speeds and the timeouts
- * We're normally limited to 15 distinct baud rates. The extra
- * are accessed via settings in info->port.flags.
- * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
- * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
- * HI VHI
- * 20
- */
-static const int baud_table[] = {
- 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
- 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
- 230400, 0
-};
-
-static const char baud_co_25[] = { /* 25 MHz clock option table */
- /* value => 00 01 02 03 04 */
- /* divide by 8 32 128 512 2048 */
- 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
- 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-};
-
-static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */
- 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
- 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
-};
-
-static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
- /* value => 00 01 02 03 04 */
- /* divide by 8 32 128 512 2048 */
- 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
- 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00
-};
-
-static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
- 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
- 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
- 0x21
-};
-
-static const char baud_cor3[] = { /* receive threshold */
- 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
- 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
- 0x07
-};
-
-/*
- * The Cyclades driver implements HW flow control as any serial driver.
- * The cyclades_port structure member rflow and the vector rflow_thr
- * allows us to take advantage of a special feature in the CD1400 to avoid
- * data loss even when the system interrupt latency is too high. These flags
- * are to be used only with very special applications. Setting these flags
- * requires the use of a special cable (DTR and RTS reversed). In the new
- * CD1400-based boards (rev. 6.00 or later), there is no need for special
- * cables.
- */
-
-static const char rflow_thr[] = { /* rflow threshold */
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
- 0x0a
-};
-
-/* The Cyclom-Ye has placed the sequential chips in non-sequential
- * address order. This look-up table overcomes that problem.
- */
-static const unsigned int cy_chip_offset[] = { 0x0000,
- 0x0400,
- 0x0800,
- 0x0C00,
- 0x0200,
- 0x0600,
- 0x0A00,
- 0x0E00
-};
-
-/* PCI related definitions */
-
-#ifdef CONFIG_PCI
-static const struct pci_device_id cy_pci_dev_id[] = {
- /* PCI < 1Mb */
- { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
- /* PCI > 1Mb */
- { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
- /* 4Y PCI < 1Mb */
- { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
- /* 4Y PCI > 1Mb */
- { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
- /* 8Y PCI < 1Mb */
- { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
- /* 8Y PCI > 1Mb */
- { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
- /* Z PCI < 1Mb */
- { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
- /* Z PCI > 1Mb */
- { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
- { } /* end of table */
-};
-MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
-#endif
-
-static void cy_start(struct tty_struct *);
-static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
-static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
-#ifdef CONFIG_ISA
-static unsigned detect_isa_irq(void __iomem *);
-#endif /* CONFIG_ISA */
-
-#ifndef CONFIG_CYZ_INTR
-static void cyz_poll(unsigned long);
-
-/* The Cyclades-Z polling cycle is defined by this variable */
-static long cyz_polling_cycle = CZ_DEF_POLL;
-
-static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
-
-#else /* CONFIG_CYZ_INTR */
-static void cyz_rx_restart(unsigned long);
-static struct timer_list cyz_rx_full_timer[NR_PORTS];
-#endif /* CONFIG_CYZ_INTR */
-
-static inline void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
-{
- struct cyclades_card *card = port->card;
-
- cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val);
-}
-
-static inline u8 cyy_readb(struct cyclades_port *port, u32 reg)
-{
- struct cyclades_card *card = port->card;
-
- return readb(port->u.cyy.base_addr + (reg << card->bus_index));
-}
-
-static inline bool cy_is_Z(struct cyclades_card *card)
-{
- return card->num_chips == (unsigned int)-1;
-}
-
-static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
-{
- return readl(&ctl_addr->init_ctrl) & (1 << 17);
-}
-
-static inline bool cyz_fpga_loaded(struct cyclades_card *card)
-{
- return __cyz_fpga_loaded(card->ctl_addr.p9060);
-}
-
-static inline bool cyz_is_loaded(struct cyclades_card *card)
-{
- struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
-
- return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
- readl(&fw_id->signature) == ZFIRM_ID;
-}
-
-static inline int serial_paranoia_check(struct cyclades_port *info,
- const char *name, const char *routine)
-{
-#ifdef SERIAL_PARANOIA_CHECK
- if (!info) {
- printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
- "in %s\n", name, routine);
- return 1;
- }
-
- if (info->magic != CYCLADES_MAGIC) {
- printk(KERN_WARNING "cyc Warning: bad magic number for serial "
- "struct (%s) in %s\n", name, routine);
- return 1;
- }
-#endif
- return 0;
-}
-
-/***********************************************************/
-/********* Start of block of Cyclom-Y specific code ********/
-
-/* This routine waits up to 1000 micro-seconds for the previous
- command to the Cirrus chip to complete and then issues the
- new command. An error is returned if the previous command
- didn't finish within the time limit.
-
- This function is only called from inside spinlock-protected code.
- */
-static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index)
-{
- void __iomem *ccr = base_addr + (CyCCR << index);
- unsigned int i;
-
- /* Check to see that the previous command has completed */
- for (i = 0; i < 100; i++) {
- if (readb(ccr) == 0)
- break;
- udelay(10L);
- }
- /* if the CCR never cleared, the previous command
- didn't finish within the "reasonable time" */
- if (i == 100)
- return -1;
-
- /* Issue the new command */
- cy_writeb(ccr, cmd);
-
- return 0;
-}
-
-static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd)
-{
- return __cyy_issue_cmd(port->u.cyy.base_addr, cmd,
- port->card->bus_index);
-}
-
-#ifdef CONFIG_ISA
-/* ISA interrupt detection code */
-static unsigned detect_isa_irq(void __iomem *address)
-{
- int irq;
- unsigned long irqs, flags;
- int save_xir, save_car;
- int index = 0; /* IRQ probing is only for ISA */
-
- /* forget possible initially masked and pending IRQ */
- irq = probe_irq_off(probe_irq_on());
-
- /* Clear interrupts on the board first */
- cy_writeb(address + (Cy_ClrIntr << index), 0);
- /* Cy_ClrIntr is 0x1800 */
-
- irqs = probe_irq_on();
- /* Wait ... */
- msleep(5);
-
- /* Enable the Tx interrupts on the CD1400 */
- local_irq_save(flags);
- cy_writeb(address + (CyCAR << index), 0);
- __cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
-
- cy_writeb(address + (CyCAR << index), 0);
- cy_writeb(address + (CySRER << index),
- readb(address + (CySRER << index)) | CyTxRdy);
- local_irq_restore(flags);
-
- /* Wait ... */
- msleep(5);
-
- /* Check which interrupt is in use */
- irq = probe_irq_off(irqs);
-
- /* Clean up */
- save_xir = (u_char) readb(address + (CyTIR << index));
- save_car = readb(address + (CyCAR << index));
- cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
- cy_writeb(address + (CySRER << index),
- readb(address + (CySRER << index)) & ~CyTxRdy);
- cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
- cy_writeb(address + (CyCAR << index), (save_car));
- cy_writeb(address + (Cy_ClrIntr << index), 0);
- /* Cy_ClrIntr is 0x1800 */
-
- return (irq > 0) ? irq : 0;
-}
-#endif /* CONFIG_ISA */
-
-static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
- void __iomem *base_addr)
-{
- struct cyclades_port *info;
- struct tty_struct *tty;
- int len, index = cinfo->bus_index;
- u8 ivr, save_xir, channel, save_car, data, char_count;
-
-#ifdef CY_DEBUG_INTERRUPTS
- printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
-#endif
- /* determine the channel & change to that context */
- save_xir = readb(base_addr + (CyRIR << index));
- channel = save_xir & CyIRChannel;
- info = &cinfo->ports[channel + chip * 4];
- save_car = cyy_readb(info, CyCAR);
- cyy_writeb(info, CyCAR, save_xir);
- ivr = cyy_readb(info, CyRIVR) & CyIVRMask;
-
- tty = tty_port_tty_get(&info->port);
- /* if there is nowhere to put the data, discard it */
- if (tty == NULL) {
- if (ivr == CyIVRRxEx) { /* exception */
- data = cyy_readb(info, CyRDSR);
- } else { /* normal character reception */
- char_count = cyy_readb(info, CyRDCR);
- while (char_count--)
- data = cyy_readb(info, CyRDSR);
- }
- goto end;
- }
- /* there is an open port for this data */
- if (ivr == CyIVRRxEx) { /* exception */
- data = cyy_readb(info, CyRDSR);
-
- /* For statistics only */
- if (data & CyBREAK)
- info->icount.brk++;
- else if (data & CyFRAME)
- info->icount.frame++;
- else if (data & CyPARITY)
- info->icount.parity++;
- else if (data & CyOVERRUN)
- info->icount.overrun++;
-
- if (data & info->ignore_status_mask) {
- info->icount.rx++;
- tty_kref_put(tty);
- return;
- }
- if (tty_buffer_request_room(tty, 1)) {
- if (data & info->read_status_mask) {
- if (data & CyBREAK) {
- tty_insert_flip_char(tty,
- cyy_readb(info, CyRDSR),
- TTY_BREAK);
- info->icount.rx++;
- if (info->port.flags & ASYNC_SAK)
- do_SAK(tty);
- } else if (data & CyFRAME) {
- tty_insert_flip_char(tty,
- cyy_readb(info, CyRDSR),
- TTY_FRAME);
- info->icount.rx++;
- info->idle_stats.frame_errs++;
- } else if (data & CyPARITY) {
- /* Pieces of seven... */
- tty_insert_flip_char(tty,
- cyy_readb(info, CyRDSR),
- TTY_PARITY);
- info->icount.rx++;
- info->idle_stats.parity_errs++;
- } else if (data & CyOVERRUN) {
- tty_insert_flip_char(tty, 0,
- TTY_OVERRUN);
- info->icount.rx++;
- /* If the flip buffer itself is
- overflowing, we still lose
- the next incoming character.
- */
- tty_insert_flip_char(tty,
- cyy_readb(info, CyRDSR),
- TTY_FRAME);
- info->icount.rx++;
- info->idle_stats.overruns++;
- /* These two conditions may imply */
- /* a normal read should be done. */
- /* } else if(data & CyTIMEOUT) { */
- /* } else if(data & CySPECHAR) { */
- } else {
- tty_insert_flip_char(tty, 0,
- TTY_NORMAL);
- info->icount.rx++;
- }
- } else {
- tty_insert_flip_char(tty, 0, TTY_NORMAL);
- info->icount.rx++;
- }
- } else {
- /* there was a software buffer overrun and nothing
- * could be done about it!!! */
- info->icount.buf_overrun++;
- info->idle_stats.overruns++;
- }
- } else { /* normal character reception */
- /* load # chars available from the chip */
- char_count = cyy_readb(info, CyRDCR);
-
-#ifdef CY_ENABLE_MONITORING
- ++info->mon.int_count;
- info->mon.char_count += char_count;
- if (char_count > info->mon.char_max)
- info->mon.char_max = char_count;
- info->mon.char_last = char_count;
-#endif
- len = tty_buffer_request_room(tty, char_count);
- while (len--) {
- data = cyy_readb(info, CyRDSR);
- tty_insert_flip_char(tty, data, TTY_NORMAL);
- info->idle_stats.recv_bytes++;
- info->icount.rx++;
-#ifdef CY_16Y_HACK
- udelay(10L);
-#endif
- }
- info->idle_stats.recv_idle = jiffies;
- }
- tty_schedule_flip(tty);
- tty_kref_put(tty);
-end:
- /* end of service */
- cyy_writeb(info, CyRIR, save_xir & 0x3f);
- cyy_writeb(info, CyCAR, save_car);
-}
-
-static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
- void __iomem *base_addr)
-{
- struct cyclades_port *info;
- struct tty_struct *tty;
- int char_count, index = cinfo->bus_index;
- u8 save_xir, channel, save_car, outch;
-
- /* Since we only get here when the transmit buffer
- is empty, we know we can always stuff a dozen
- characters. */
-#ifdef CY_DEBUG_INTERRUPTS
- printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
-#endif
-
- /* determine the channel & change to that context */
- save_xir = readb(base_addr + (CyTIR << index));
- channel = save_xir & CyIRChannel;
- save_car = readb(base_addr + (CyCAR << index));
- cy_writeb(base_addr + (CyCAR << index), save_xir);
-
- info = &cinfo->ports[channel + chip * 4];
- tty = tty_port_tty_get(&info->port);
- if (tty == NULL) {
- cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
- goto end;
- }
-
- /* load the on-chip space for outbound data */
- char_count = info->xmit_fifo_size;
-
- if (info->x_char) { /* send special char */
- outch = info->x_char;
- cyy_writeb(info, CyTDR, outch);
- char_count--;
- info->icount.tx++;
- info->x_char = 0;
- }
-
- if (info->breakon || info->breakoff) {
- if (info->breakon) {
- cyy_writeb(info, CyTDR, 0);
- cyy_writeb(info, CyTDR, 0x81);
- info->breakon = 0;
- char_count -= 2;
- }
- if (info->breakoff) {
- cyy_writeb(info, CyTDR, 0);
- cyy_writeb(info, CyTDR, 0x83);
- info->breakoff = 0;
- char_count -= 2;
- }
- }
-
- while (char_count-- > 0) {
- if (!info->xmit_cnt) {
- if (cyy_readb(info, CySRER) & CyTxMpty) {
- cyy_writeb(info, CySRER,
- cyy_readb(info, CySRER) & ~CyTxMpty);
- } else {
- cyy_writeb(info, CySRER, CyTxMpty |
- (cyy_readb(info, CySRER) & ~CyTxRdy));
- }
- goto done;
- }
- if (info->port.xmit_buf == NULL) {
- cyy_writeb(info, CySRER,
- cyy_readb(info, CySRER) & ~CyTxRdy);
- goto done;
- }
- if (tty->stopped || tty->hw_stopped) {
- cyy_writeb(info, CySRER,
- cyy_readb(info, CySRER) & ~CyTxRdy);
- goto done;
- }
- /* Because the Embedded Transmit Commands have been enabled,
- * we must check to see if the escape character, NULL, is being
- * sent. If it is, we must ensure that there is room for it to
- * be doubled in the output stream. Therefore we no longer
- * advance the pointer when the character is fetched, but
- * rather wait until after the check for a NULL output
- * character. This is necessary because there may not be room
- * for the two chars needed to send a NULL.)
- */
- outch = info->port.xmit_buf[info->xmit_tail];
- if (outch) {
- info->xmit_cnt--;
- info->xmit_tail = (info->xmit_tail + 1) &
- (SERIAL_XMIT_SIZE - 1);
- cyy_writeb(info, CyTDR, outch);
- info->icount.tx++;
- } else {
- if (char_count > 1) {
- info->xmit_cnt--;
- info->xmit_tail = (info->xmit_tail + 1) &
- (SERIAL_XMIT_SIZE - 1);
- cyy_writeb(info, CyTDR, outch);
- cyy_writeb(info, CyTDR, 0);
- info->icount.tx++;
- char_count--;
- }
- }
- }
-
-done:
- tty_wakeup(tty);
- tty_kref_put(tty);
-end:
- /* end of service */
- cyy_writeb(info, CyTIR, save_xir & 0x3f);
- cyy_writeb(info, CyCAR, save_car);
-}
-
-static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
- void __iomem *base_addr)
-{
- struct cyclades_port *info;
- struct tty_struct *tty;
- int index = cinfo->bus_index;
- u8 save_xir, channel, save_car, mdm_change, mdm_status;
-
- /* determine the channel & change to that context */
- save_xir = readb(base_addr + (CyMIR << index));
- channel = save_xir & CyIRChannel;
- info = &cinfo->ports[channel + chip * 4];
- save_car = cyy_readb(info, CyCAR);
- cyy_writeb(info, CyCAR, save_xir);
-
- mdm_change = cyy_readb(info, CyMISR);
- mdm_status = cyy_readb(info, CyMSVR1);
-
- tty = tty_port_tty_get(&info->port);
- if (!tty)
- goto end;
-
- if (mdm_change & CyANY_DELTA) {
- /* For statistics only */
- if (mdm_change & CyDCD)
- info->icount.dcd++;
- if (mdm_change & CyCTS)
- info->icount.cts++;
- if (mdm_change & CyDSR)
- info->icount.dsr++;
- if (mdm_change & CyRI)
- info->icount.rng++;
-
- wake_up_interruptible(&info->port.delta_msr_wait);
- }
-
- if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
- if (mdm_status & CyDCD)
- wake_up_interruptible(&info->port.open_wait);
- else
- tty_hangup(tty);
- }
- if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
- if (tty->hw_stopped) {
- if (mdm_status & CyCTS) {
- /* cy_start isn't used
- because... !!! */
- tty->hw_stopped = 0;
- cyy_writeb(info, CySRER,
- cyy_readb(info, CySRER) | CyTxRdy);
- tty_wakeup(tty);
- }
- } else {
- if (!(mdm_status & CyCTS)) {
- /* cy_stop isn't used
- because ... !!! */
- tty->hw_stopped = 1;
- cyy_writeb(info, CySRER,
- cyy_readb(info, CySRER) & ~CyTxRdy);
- }
- }
- }
-/* if (mdm_change & CyDSR) {
- }
- if (mdm_change & CyRI) {
- }*/
- tty_kref_put(tty);
-end:
- /* end of service */
- cyy_writeb(info, CyMIR, save_xir & 0x3f);
- cyy_writeb(info, CyCAR, save_car);
-}
-
-/* The real interrupt service routine is called
- whenever the card wants its hand held--chars
- received, out buffer empty, modem change, etc.
- */
-static irqreturn_t cyy_interrupt(int irq, void *dev_id)
-{
- int status;
- struct cyclades_card *cinfo = dev_id;
- void __iomem *base_addr, *card_base_addr;
- unsigned int chip, too_many, had_work;
- int index;
-
- if (unlikely(cinfo == NULL)) {
-#ifdef CY_DEBUG_INTERRUPTS
- printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
- irq);
-#endif
- return IRQ_NONE; /* spurious interrupt */
- }
-
- card_base_addr = cinfo->base_addr;
- index = cinfo->bus_index;
-
- /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
- if (unlikely(card_base_addr == NULL))
- return IRQ_HANDLED;
-
- /* This loop checks all chips in the card. Make a note whenever
- _any_ chip had some work to do, as this is considered an
- indication that there will be more to do. Only when no chip
- has any work does this outermost loop exit.
- */
- do {
- had_work = 0;
- for (chip = 0; chip < cinfo->num_chips; chip++) {
- base_addr = cinfo->base_addr +
- (cy_chip_offset[chip] << index);
- too_many = 0;
- while ((status = readb(base_addr +
- (CySVRR << index))) != 0x00) {
- had_work++;
- /* The purpose of the following test is to ensure that
- no chip can monopolize the driver. This forces the
- chips to be checked in a round-robin fashion (after
- draining each of a bunch (1000) of characters).
- */
- if (1000 < too_many++)
- break;
- spin_lock(&cinfo->card_lock);
- if (status & CySRReceive) /* rx intr */
- cyy_chip_rx(cinfo, chip, base_addr);
- if (status & CySRTransmit) /* tx intr */
- cyy_chip_tx(cinfo, chip, base_addr);
- if (status & CySRModem) /* modem intr */
- cyy_chip_modem(cinfo, chip, base_addr);
- spin_unlock(&cinfo->card_lock);
- }
- }
- } while (had_work);
-
- /* clear interrupts */
- spin_lock(&cinfo->card_lock);
- cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
- /* Cy_ClrIntr is 0x1800 */
- spin_unlock(&cinfo->card_lock);
- return IRQ_HANDLED;
-} /* cyy_interrupt */
-
-static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
- unsigned int clear)
-{
- struct cyclades_card *card = info->card;
- int channel = info->line - card->first_line;
- u32 rts, dtr, msvrr, msvrd;
-
- channel &= 0x03;
-
- if (info->rtsdtr_inv) {
- msvrr = CyMSVR2;
- msvrd = CyMSVR1;
- rts = CyDTR;
- dtr = CyRTS;
- } else {
- msvrr = CyMSVR1;
- msvrd = CyMSVR2;
- rts = CyRTS;
- dtr = CyDTR;
- }
- if (set & TIOCM_RTS) {
- cyy_writeb(info, CyCAR, channel);
- cyy_writeb(info, msvrr, rts);
- }
- if (clear & TIOCM_RTS) {
- cyy_writeb(info, CyCAR, channel);
- cyy_writeb(info, msvrr, ~rts);
- }
- if (set & TIOCM_DTR) {
- cyy_writeb(info, CyCAR, channel);
- cyy_writeb(info, msvrd, dtr);
-#ifdef CY_DEBUG_DTR
- printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
- printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
- cyy_readb(info, CyMSVR1),
- cyy_readb(info, CyMSVR2));
-#endif
- }
- if (clear & TIOCM_DTR) {
- cyy_writeb(info, CyCAR, channel);
- cyy_writeb(info, msvrd, ~dtr);
-#ifdef CY_DEBUG_DTR
- printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
- printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
- cyy_readb(info, CyMSVR1),
- cyy_readb(info, CyMSVR2));
-#endif
- }
-}
-
-/***********************************************************/
-/********* End of block of Cyclom-Y specific code **********/
-/******** Start of block of Cyclades-Z specific code *******/
-/***********************************************************/
-
-static int
-cyz_fetch_msg(struct cyclades_card *cinfo,
- __u32 *channel, __u8 *cmd, __u32 *param)
-{
- struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
- unsigned long loc_doorbell;
-
- loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
- if (loc_doorbell) {
- *cmd = (char)(0xff & loc_doorbell);
- *channel = readl(&board_ctrl->fwcmd_channel);
- *param = (__u32) readl(&board_ctrl->fwcmd_param);
- cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
- return 1;
- }
- return 0;
-} /* cyz_fetch_msg */
-
-static int
-cyz_issue_cmd(struct cyclades_card *cinfo,
- __u32 channel, __u8 cmd, __u32 param)
-{
- struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
- __u32 __iomem *pci_doorbell;
- unsigned int index;
-
- if (!cyz_is_loaded(cinfo))
- return -1;
-
- index = 0;
- pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
- while ((readl(pci_doorbell) & 0xff) != 0) {
- if (index++ == 1000)
- return (int)(readl(pci_doorbell) & 0xff);
- udelay(50L);
- }
- cy_writel(&board_ctrl->hcmd_channel, channel);
- cy_writel(&board_ctrl->hcmd_param, param);
- cy_writel(pci_doorbell, (long)cmd);
-
- return 0;
-} /* cyz_issue_cmd */
-
-static void cyz_handle_rx(struct cyclades_port *info, struct tty_struct *tty)
-{
- struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
- struct cyclades_card *cinfo = info->card;
- unsigned int char_count;
- int len;
-#ifdef BLOCKMOVE
- unsigned char *buf;
-#else
- char data;
-#endif
- __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
-
- rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
- rx_put = readl(&buf_ctrl->rx_put);
- rx_bufsize = readl(&buf_ctrl->rx_bufsize);
- rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
- if (rx_put >= rx_get)
- char_count = rx_put - rx_get;
- else
- char_count = rx_put - rx_get + rx_bufsize;
-
- if (char_count) {
-#ifdef CY_ENABLE_MONITORING
- info->mon.int_count++;
- info->mon.char_count += char_count;
- if (char_count > info->mon.char_max)
- info->mon.char_max = char_count;
- info->mon.char_last = char_count;
-#endif
- if (tty == NULL) {
- /* flush received characters */
- new_rx_get = (new_rx_get + char_count) &
- (rx_bufsize - 1);
- info->rflush_count++;
- } else {
-#ifdef BLOCKMOVE
- /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
- for performance, but because of buffer boundaries, there
- may be several steps to the operation */
- while (1) {
- len = tty_prepare_flip_string(tty, &buf,
- char_count);
- if (!len)
- break;
-
- len = min_t(unsigned int, min(len, char_count),
- rx_bufsize - new_rx_get);
-
- memcpy_fromio(buf, cinfo->base_addr +
- rx_bufaddr + new_rx_get, len);
-
- new_rx_get = (new_rx_get + len) &
- (rx_bufsize - 1);
- char_count -= len;
- info->icount.rx += len;
- info->idle_stats.recv_bytes += len;
- }
-#else
- len = tty_buffer_request_room(tty, char_count);
- while (len--) {
- data = readb(cinfo->base_addr + rx_bufaddr +
- new_rx_get);
- new_rx_get = (new_rx_get + 1) &
- (rx_bufsize - 1);
- tty_insert_flip_char(tty, data, TTY_NORMAL);
- info->idle_stats.recv_bytes++;
- info->icount.rx++;
- }
-#endif
-#ifdef CONFIG_CYZ_INTR
- /* Recalculate the number of chars in the RX buffer and issue
- a cmd in case it's higher than the RX high water mark */
- rx_put = readl(&buf_ctrl->rx_put);
- if (rx_put >= rx_get)
- char_count = rx_put - rx_get;
- else
- char_count = rx_put - rx_get + rx_bufsize;
- if (char_count >= readl(&buf_ctrl->rx_threshold) &&
- !timer_pending(&cyz_rx_full_timer[
- info->line]))
- mod_timer(&cyz_rx_full_timer[info->line],
- jiffies + 1);
-#endif
- info->idle_stats.recv_idle = jiffies;
- tty_schedule_flip(tty);
- }
- /* Update rx_get */
- cy_writel(&buf_ctrl->rx_get, new_rx_get);
- }
-}
-
-static void cyz_handle_tx(struct cyclades_port *info, struct tty_struct *tty)
-{
- struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
- struct cyclades_card *cinfo = info->card;
- u8 data;
- unsigned int char_count;
-#ifdef BLOCKMOVE
- int small_count;
-#endif
- __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
-
- if (info->xmit_cnt <= 0) /* Nothing to transmit */
- return;
-
- tx_get = readl(&buf_ctrl->tx_get);
- tx_put = readl(&buf_ctrl->tx_put);
- tx_bufsize = readl(&buf_ctrl->tx_bufsize);
- tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
- if (tx_put >= tx_get)
- char_count = tx_get - tx_put - 1 + tx_bufsize;
- else
- char_count = tx_get - tx_put - 1;
-
- if (char_count) {
-
- if (tty == NULL)
- goto ztxdone;
-
- if (info->x_char) { /* send special char */
- data = info->x_char;
-
- cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
- tx_put = (tx_put + 1) & (tx_bufsize - 1);
- info->x_char = 0;
- char_count--;
- info->icount.tx++;
- }
-#ifdef BLOCKMOVE
- while (0 < (small_count = min_t(unsigned int,
- tx_bufsize - tx_put, min_t(unsigned int,
- (SERIAL_XMIT_SIZE - info->xmit_tail),
- min_t(unsigned int, info->xmit_cnt,
- char_count))))) {
-
- memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
- tx_put),
- &info->port.xmit_buf[info->xmit_tail],
- small_count);
-
- tx_put = (tx_put + small_count) & (tx_bufsize - 1);
- char_count -= small_count;
- info->icount.tx += small_count;
- info->xmit_cnt -= small_count;
- info->xmit_tail = (info->xmit_tail + small_count) &
- (SERIAL_XMIT_SIZE - 1);
- }
-#else
- while (info->xmit_cnt && char_count) {
- data = info->port.xmit_buf[info->xmit_tail];
- info->xmit_cnt--;
- info->xmit_tail = (info->xmit_tail + 1) &
- (SERIAL_XMIT_SIZE - 1);
-
- cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
- tx_put = (tx_put + 1) & (tx_bufsize - 1);
- char_count--;
- info->icount.tx++;
- }
-#endif
- tty_wakeup(tty);
-ztxdone:
- /* Update tx_put */
- cy_writel(&buf_ctrl->tx_put, tx_put);
- }
-}
-
-static void cyz_handle_cmd(struct cyclades_card *cinfo)
-{
- struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
- struct tty_struct *tty;
- struct cyclades_port *info;
- __u32 channel, param, fw_ver;
- __u8 cmd;
- int special_count;
- int delta_count;
-
- fw_ver = readl(&board_ctrl->fw_version);
-
- while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
- special_count = 0;
- delta_count = 0;
- info = &cinfo->ports[channel];
- tty = tty_port_tty_get(&info->port);
- if (tty == NULL)
- continue;
-
- switch (cmd) {
- case C_CM_PR_ERROR:
- tty_insert_flip_char(tty, 0, TTY_PARITY);
- info->icount.rx++;
- special_count++;
- break;
- case C_CM_FR_ERROR:
- tty_insert_flip_char(tty, 0, TTY_FRAME);
- info->icount.rx++;
- special_count++;
- break;
- case C_CM_RXBRK:
- tty_insert_flip_char(tty, 0, TTY_BREAK);
- info->icount.rx++;
- special_count++;
- break;
- case C_CM_MDCD:
- info->icount.dcd++;
- delta_count++;
- if (info->port.flags & ASYNC_CHECK_CD) {
- u32 dcd = fw_ver > 241 ? param :
- readl(&info->u.cyz.ch_ctrl->rs_status);
- if (dcd & C_RS_DCD)
- wake_up_interruptible(&info->port.open_wait);
- else
- tty_hangup(tty);
- }
- break;
- case C_CM_MCTS:
- info->icount.cts++;
- delta_count++;
- break;
- case C_CM_MRI:
- info->icount.rng++;
- delta_count++;
- break;
- case C_CM_MDSR:
- info->icount.dsr++;
- delta_count++;
- break;
-#ifdef Z_WAKE
- case C_CM_IOCTLW:
- complete(&info->shutdown_wait);
- break;
-#endif
-#ifdef CONFIG_CYZ_INTR
- case C_CM_RXHIWM:
- case C_CM_RXNNDT:
- case C_CM_INTBACK2:
- /* Reception Interrupt */
-#ifdef CY_DEBUG_INTERRUPTS
- printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
- "port %ld\n", info->card, channel);
-#endif
- cyz_handle_rx(info, tty);
- break;
- case C_CM_TXBEMPTY:
- case C_CM_TXLOWWM:
- case C_CM_INTBACK:
- /* Transmission Interrupt */
-#ifdef CY_DEBUG_INTERRUPTS
- printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
- "port %ld\n", info->card, channel);
-#endif
- cyz_handle_tx(info, tty);
- break;
-#endif /* CONFIG_CYZ_INTR */
- case C_CM_FATAL:
- /* should do something with this !!! */
- break;
- default:
- break;
- }
- if (delta_count)
- wake_up_interruptible(&info->port.delta_msr_wait);
- if (special_count)
- tty_schedule_flip(tty);
- tty_kref_put(tty);
- }
-}
-
-#ifdef CONFIG_CYZ_INTR
-static irqreturn_t cyz_interrupt(int irq, void *dev_id)
-{
- struct cyclades_card *cinfo = dev_id;
-
- if (unlikely(!cyz_is_loaded(cinfo))) {
-#ifdef CY_DEBUG_INTERRUPTS
- printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
- "(IRQ%d).\n", irq);
-#endif
- return IRQ_NONE;
- }
-
- /* Handle the interrupts */
- cyz_handle_cmd(cinfo);
-
- return IRQ_HANDLED;
-} /* cyz_interrupt */
-
-static void cyz_rx_restart(unsigned long arg)
-{
- struct cyclades_port *info = (struct cyclades_port *)arg;
- struct cyclades_card *card = info->card;
- int retval;
- __u32 channel = info->line - card->first_line;
- unsigned long flags;
-
- spin_lock_irqsave(&card->card_lock, flags);
- retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
- if (retval != 0) {
- printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
- info->line, retval);
- }
- spin_unlock_irqrestore(&card->card_lock, flags);
-}
-
-#else /* CONFIG_CYZ_INTR */
-
-static void cyz_poll(unsigned long arg)
-{
- struct cyclades_card *cinfo;
- struct cyclades_port *info;
- unsigned long expires = jiffies + HZ;
- unsigned int port, card;
-
- for (card = 0; card < NR_CARDS; card++) {
- cinfo = &cy_card[card];
-
- if (!cy_is_Z(cinfo))
- continue;
- if (!cyz_is_loaded(cinfo))
- continue;
-
- /* Skip first polling cycle to avoid racing conditions with the FW */
- if (!cinfo->intr_enabled) {
- cinfo->intr_enabled = 1;
- continue;
- }
-
- cyz_handle_cmd(cinfo);
-
- for (port = 0; port < cinfo->nports; port++) {
- struct tty_struct *tty;
-
- info = &cinfo->ports[port];
- tty = tty_port_tty_get(&info->port);
- /* OK to pass NULL to the handle functions below.
- They need to drop the data in that case. */
-
- if (!info->throttle)
- cyz_handle_rx(info, tty);
- cyz_handle_tx(info, tty);
- tty_kref_put(tty);
- }
- /* poll every 'cyz_polling_cycle' period */
- expires = jiffies + cyz_polling_cycle;
- }
- mod_timer(&cyz_timerlist, expires);
-} /* cyz_poll */
-
-#endif /* CONFIG_CYZ_INTR */
-
-/********** End of block of Cyclades-Z specific code *********/
-/***********************************************************/
-
-/* This is called whenever a port becomes active;
- interrupts are enabled and DTR & RTS are turned on.
- */
-static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
-{
- struct cyclades_card *card;
- unsigned long flags;
- int retval = 0;
- int channel;
- unsigned long page;
-
- card = info->card;
- channel = info->line - card->first_line;
-
- page = get_zeroed_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
-
- spin_lock_irqsave(&card->card_lock, flags);
-
- if (info->port.flags & ASYNC_INITIALIZED)
- goto errout;
-
- if (!info->type) {
- set_bit(TTY_IO_ERROR, &tty->flags);
- goto errout;
- }
-
- if (info->port.xmit_buf)
- free_page(page);
- else
- info->port.xmit_buf = (unsigned char *)page;
-
- spin_unlock_irqrestore(&card->card_lock, flags);
-
- cy_set_line_char(info, tty);
-
- if (!cy_is_Z(card)) {
- channel &= 0x03;
-
- spin_lock_irqsave(&card->card_lock, flags);
-
- cyy_writeb(info, CyCAR, channel);
-
- cyy_writeb(info, CyRTPR,
- (info->default_timeout ? info->default_timeout : 0x02));
- /* 10ms rx timeout */
-
- cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR);
-
- cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
-
- cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData);
- } else {
- struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
-
- if (!cyz_is_loaded(card))
- return -ENODEV;
-
-#ifdef CY_DEBUG_OPEN
- printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
- "base_addr %p\n", card, channel, card->base_addr);
-#endif
- spin_lock_irqsave(&card->card_lock, flags);
-
- cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE);
-#ifdef Z_WAKE
-#ifdef CONFIG_CYZ_INTR
- cy_writel(&ch_ctrl->intr_enable,
- C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
- C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
-#else
- cy_writel(&ch_ctrl->intr_enable,
- C_IN_IOCTLW | C_IN_MDCD);
-#endif /* CONFIG_CYZ_INTR */
-#else
-#ifdef CONFIG_CYZ_INTR
- cy_writel(&ch_ctrl->intr_enable,
- C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
- C_IN_RXNNDT | C_IN_MDCD);
-#else
- cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD);
-#endif /* CONFIG_CYZ_INTR */
-#endif /* Z_WAKE */
-
- retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
- if (retval != 0) {
- printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
- "%x\n", info->line, retval);
- }
-
- /* Flush RX buffers before raising DTR and RTS */
- retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
- if (retval != 0) {
- printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
- "%x\n", info->line, retval);
- }
-
- /* set timeout !!! */
- /* set RTS and DTR !!! */
- tty_port_raise_dtr_rts(&info->port);
-
- /* enable send, recv, modem !!! */
- }
-
- info->port.flags |= ASYNC_INITIALIZED;
-
- clear_bit(TTY_IO_ERROR, &tty->flags);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
- info->breakon = info->breakoff = 0;
- memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
- info->idle_stats.in_use =
- info->idle_stats.recv_idle =
- info->idle_stats.xmit_idle = jiffies;
-
- spin_unlock_irqrestore(&card->card_lock, flags);
-
-#ifdef CY_DEBUG_OPEN
- printk(KERN_DEBUG "cyc startup done\n");
-#endif
- return 0;
-
-errout:
- spin_unlock_irqrestore(&card->card_lock, flags);
- free_page(page);
- return retval;
-} /* startup */
-
-static void start_xmit(struct cyclades_port *info)
-{
- struct cyclades_card *card = info->card;
- unsigned long flags;
- int channel = info->line - card->first_line;
-
- if (!cy_is_Z(card)) {
- spin_lock_irqsave(&card->card_lock, flags);
- cyy_writeb(info, CyCAR, channel & 0x03);
- cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
- spin_unlock_irqrestore(&card->card_lock, flags);
- } else {
-#ifdef CONFIG_CYZ_INTR
- int retval;
-
- spin_lock_irqsave(&card->card_lock, flags);
- retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
- if (retval != 0) {
- printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
- "%x\n", info->line, retval);
- }
- spin_unlock_irqrestore(&card->card_lock, flags);
-#else /* CONFIG_CYZ_INTR */
- /* Don't have to do anything at this time */
-#endif /* CONFIG_CYZ_INTR */
- }
-} /* start_xmit */
-
-/*
- * This routine shuts down a serial port; interrupts are disabled,
- * and DTR is dropped if the hangup on close termio flag is on.
- */
-static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
-{
- struct cyclades_card *card;
- unsigned long flags;
- int channel;
-
- if (!(info->port.flags & ASYNC_INITIALIZED))
- return;
-
- card = info->card;
- channel = info->line - card->first_line;
- if (!cy_is_Z(card)) {
- spin_lock_irqsave(&card->card_lock, flags);
-
- /* Clear delta_msr_wait queue to avoid mem leaks. */
- wake_up_interruptible(&info->port.delta_msr_wait);
-
- if (info->port.xmit_buf) {
- unsigned char *temp;
- temp = info->port.xmit_buf;
- info->port.xmit_buf = NULL;
- free_page((unsigned long)temp);
- }
- if (tty->termios->c_cflag & HUPCL)
- cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
-
- cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR);
- /* it may be appropriate to clear _XMIT at
- some later date (after testing)!!! */
-
- set_bit(TTY_IO_ERROR, &tty->flags);
- info->port.flags &= ~ASYNC_INITIALIZED;
- spin_unlock_irqrestore(&card->card_lock, flags);
- } else {
-#ifdef CY_DEBUG_OPEN
- printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
- "base_addr %p\n", card, channel, card->base_addr);
-#endif
-
- if (!cyz_is_loaded(card))
- return;
-
- spin_lock_irqsave(&card->card_lock, flags);
-
- if (info->port.xmit_buf) {
- unsigned char *temp;
- temp = info->port.xmit_buf;
- info->port.xmit_buf = NULL;
- free_page((unsigned long)temp);
- }
-
- if (tty->termios->c_cflag & HUPCL)
- tty_port_lower_dtr_rts(&info->port);
-
- set_bit(TTY_IO_ERROR, &tty->flags);
- info->port.flags &= ~ASYNC_INITIALIZED;
-
- spin_unlock_irqrestore(&card->card_lock, flags);
- }
-
-#ifdef CY_DEBUG_OPEN
- printk(KERN_DEBUG "cyc shutdown done\n");
-#endif
-} /* shutdown */
-
-/*
- * ------------------------------------------------------------
- * cy_open() and friends
- * ------------------------------------------------------------
- */
-
-/*
- * This routine is called whenever a serial port is opened. It
- * performs the serial-specific initialization for the tty structure.
- */
-static int cy_open(struct tty_struct *tty, struct file *filp)
-{
- struct cyclades_port *info;
- unsigned int i, line;
- int retval;
-
- line = tty->index;
- if (tty->index < 0 || NR_PORTS <= line)
- return -ENODEV;
-
- for (i = 0; i < NR_CARDS; i++)
- if (line < cy_card[i].first_line + cy_card[i].nports &&
- line >= cy_card[i].first_line)
- break;
- if (i >= NR_CARDS)
- return -ENODEV;
- info = &cy_card[i].ports[line - cy_card[i].first_line];
- if (info->line < 0)
- return -ENODEV;
-
- /* If the card's firmware hasn't been loaded,
- treat it as absent from the system. This
- will make the user pay attention.
- */
- if (cy_is_Z(info->card)) {
- struct cyclades_card *cinfo = info->card;
- struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
-
- if (!cyz_is_loaded(cinfo)) {
- if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
- readl(&firm_id->signature) ==
- ZFIRM_HLT) {
- printk(KERN_ERR "cyc:Cyclades-Z Error: you "
- "need an external power supply for "
- "this number of ports.\nFirmware "
- "halted.\n");
- } else {
- printk(KERN_ERR "cyc:Cyclades-Z firmware not "
- "yet loaded\n");
- }
- return -ENODEV;
- }
-#ifdef CONFIG_CYZ_INTR
- else {
- /* In case this Z board is operating in interrupt mode, its
- interrupts should be enabled as soon as the first open
- happens to one of its ports. */
- if (!cinfo->intr_enabled) {
- u16 intr;
-
- /* Enable interrupts on the PLX chip */
- intr = readw(&cinfo->ctl_addr.p9060->
- intr_ctrl_stat) | 0x0900;
- cy_writew(&cinfo->ctl_addr.p9060->
- intr_ctrl_stat, intr);
- /* Enable interrupts on the FW */
- retval = cyz_issue_cmd(cinfo, 0,
- C_CM_IRQ_ENBL, 0L);
- if (retval != 0) {
- printk(KERN_ERR "cyc:IRQ enable retval "
- "was %x\n", retval);
- }
- cinfo->intr_enabled = 1;
- }
- }
-#endif /* CONFIG_CYZ_INTR */
- /* Make sure this Z port really exists in hardware */
- if (info->line > (cinfo->first_line + cinfo->nports - 1))
- return -ENODEV;
- }
-#ifdef CY_DEBUG_OTHER
- printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
-#endif
- tty->driver_data = info;
- if (serial_paranoia_check(info, tty->name, "cy_open"))
- return -ENODEV;
-
-#ifdef CY_DEBUG_OPEN
- printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
- info->port.count);
-#endif
- info->port.count++;
-#ifdef CY_DEBUG_COUNT
- printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
- current->pid, info->port.count);
-#endif
-
- /*
- * If the port is the middle of closing, bail out now
- */
- if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
- wait_event_interruptible_tty(info->port.close_wait,
- !(info->port.flags & ASYNC_CLOSING));
- return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
- }
-
- /*
- * Start up serial port
- */
- retval = cy_startup(info, tty);
- if (retval)
- return retval;
-
- retval = tty_port_block_til_ready(&info->port, tty, filp);
- if (retval) {
-#ifdef CY_DEBUG_OPEN
- printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
- "with %d\n", retval);
-#endif
- return retval;
- }
-
- info->throttle = 0;
- tty_port_tty_set(&info->port, tty);
-
-#ifdef CY_DEBUG_OPEN
- printk(KERN_DEBUG "cyc:cy_open done\n");
-#endif
- return 0;
-} /* cy_open */
-
-/*
- * cy_wait_until_sent() --- wait until the transmitter is empty
- */
-static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
-{
- struct cyclades_card *card;
- struct cyclades_port *info = tty->driver_data;
- unsigned long orig_jiffies;
- int char_time;
-
- if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
- return;
-
- if (info->xmit_fifo_size == 0)
- return; /* Just in case.... */
-
- orig_jiffies = jiffies;
- /*
- * Set the check interval to be 1/5 of the estimated time to
- * send a single character, and make it at least 1. The check
- * interval should also be less than the timeout.
- *
- * Note: we have to use pretty tight timings here to satisfy
- * the NIST-PCTS.
- */
- char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
- char_time = char_time / 5;
- if (char_time <= 0)
- char_time = 1;
- if (timeout < 0)
- timeout = 0;
- if (timeout)
- char_time = min(char_time, timeout);
- /*
- * If the transmitter hasn't cleared in twice the approximate
- * amount of time to send the entire FIFO, it probably won't
- * ever clear. This assumes the UART isn't doing flow
- * control, which is currently the case. Hence, if it ever
- * takes longer than info->timeout, this is probably due to a
- * UART bug of some kind. So, we clamp the timeout parameter at
- * 2*info->timeout.
- */
- if (!timeout || timeout > 2 * info->timeout)
- timeout = 2 * info->timeout;
-#ifdef CY_DEBUG_WAIT_UNTIL_SENT
- printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
- timeout, char_time, jiffies);
-#endif
- card = info->card;
- if (!cy_is_Z(card)) {
- while (cyy_readb(info, CySRER) & CyTxRdy) {
-#ifdef CY_DEBUG_WAIT_UNTIL_SENT
- printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
-#endif
- if (msleep_interruptible(jiffies_to_msecs(char_time)))
- break;
- if (timeout && time_after(jiffies, orig_jiffies +
- timeout))
- break;
- }
- }
- /* Run one more char cycle */
- msleep_interruptible(jiffies_to_msecs(char_time * 5));
-#ifdef CY_DEBUG_WAIT_UNTIL_SENT
- printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
-#endif
-}
-
-static void cy_flush_buffer(struct tty_struct *tty)
-{
- struct cyclades_port *info = tty->driver_data;
- struct cyclades_card *card;
- int channel, retval;
- unsigned long flags;
-
-#ifdef CY_DEBUG_IO
- printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
-#endif
-
- if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
- return;
-
- card = info->card;
- channel = info->line - card->first_line;
-
- spin_lock_irqsave(&card->card_lock, flags);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
- spin_unlock_irqrestore(&card->card_lock, flags);
-
- if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
- buffers as well */
- spin_lock_irqsave(&card->card_lock, flags);
- retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
- if (retval != 0) {
- printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
- "was %x\n", info->line, retval);
- }
- spin_unlock_irqrestore(&card->card_lock, flags);
- }
- tty_wakeup(tty);
-} /* cy_flush_buffer */
-
-
-static void cy_do_close(struct tty_port *port)
-{
- struct cyclades_port *info = container_of(port, struct cyclades_port,
- port);
- struct cyclades_card *card;
- unsigned long flags;
- int channel;
-
- card = info->card;
- channel = info->line - card->first_line;
- spin_lock_irqsave(&card->card_lock, flags);
-
- if (!cy_is_Z(card)) {
- /* Stop accepting input */
- cyy_writeb(info, CyCAR, channel & 0x03);
- cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
- if (info->port.flags & ASYNC_INITIALIZED) {
- /* Waiting for on-board buffers to be empty before
- closing the port */
- spin_unlock_irqrestore(&card->card_lock, flags);
- cy_wait_until_sent(port->tty, info->timeout);
- spin_lock_irqsave(&card->card_lock, flags);
- }
- } else {
-#ifdef Z_WAKE
- /* Waiting for on-board buffers to be empty before closing
- the port */
- struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
- int retval;
-
- if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) {
- retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
- if (retval != 0) {
- printk(KERN_DEBUG "cyc:cy_close retval on "
- "ttyC%d was %x\n", info->line, retval);
- }
- spin_unlock_irqrestore(&card->card_lock, flags);
- wait_for_completion_interruptible(&info->shutdown_wait);
- spin_lock_irqsave(&card->card_lock, flags);
- }
-#endif
- }
- spin_unlock_irqrestore(&card->card_lock, flags);
- cy_shutdown(info, port->tty);
-}
-
-/*
- * This routine is called when a particular tty device is closed.
- */
-static void cy_close(struct tty_struct *tty, struct file *filp)
-{
- struct cyclades_port *info = tty->driver_data;
- if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
- return;
- tty_port_close(&info->port, tty, filp);
-} /* cy_close */
-
-/* This routine gets called when tty_write has put something into
- * the write_queue. The characters may come from user space or
- * kernel space.
- *
- * This routine will return the number of characters actually
- * accepted for writing.
- *
- * If the port is not already transmitting stuff, start it off by
- * enabling interrupts. The interrupt service routine will then
- * ensure that the characters are sent.
- * If the port is already active, there is no need to kick it.
- *
- */
-static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
-{
- struct cyclades_port *info = tty->driver_data;
- unsigned long flags;
- int c, ret = 0;
-
-#ifdef CY_DEBUG_IO
- printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
-#endif
-
- if (serial_paranoia_check(info, tty->name, "cy_write"))
- return 0;
-
- if (!info->port.xmit_buf)
- return 0;
-
- spin_lock_irqsave(&info->card->card_lock, flags);
- while (1) {
- c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
- c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
-
- if (c <= 0)
- break;
-
- memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
- info->xmit_head = (info->xmit_head + c) &
- (SERIAL_XMIT_SIZE - 1);
- info->xmit_cnt += c;
- buf += c;
- count -= c;
- ret += c;
- }
- spin_unlock_irqrestore(&info->card->card_lock, flags);
-
- info->idle_stats.xmit_bytes += ret;
- info->idle_stats.xmit_idle = jiffies;
-
- if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
- start_xmit(info);
-
- return ret;
-} /* cy_write */
-
-/*
- * This routine is called by the kernel to write a single
- * character to the tty device. If the kernel uses this routine,
- * it must call the flush_chars() routine (if defined) when it is
- * done stuffing characters into the driver. If there is no room
- * in the queue, the character is ignored.
- */
-static int cy_put_char(struct tty_struct *tty, unsigned char ch)
-{
- struct cyclades_port *info = tty->driver_data;
- unsigned long flags;
-
-#ifdef CY_DEBUG_IO
- printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
-#endif
-
- if (serial_paranoia_check(info, tty->name, "cy_put_char"))
- return 0;
-
- if (!info->port.xmit_buf)
- return 0;
-
- spin_lock_irqsave(&info->card->card_lock, flags);
- if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
- spin_unlock_irqrestore(&info->card->card_lock, flags);
- return 0;
- }
-
- info->port.xmit_buf[info->xmit_head++] = ch;
- info->xmit_head &= SERIAL_XMIT_SIZE - 1;
- info->xmit_cnt++;
- info->idle_stats.xmit_bytes++;
- info->idle_stats.xmit_idle = jiffies;
- spin_unlock_irqrestore(&info->card->card_lock, flags);
- return 1;
-} /* cy_put_char */
-
-/*
- * This routine is called by the kernel after it has written a
- * series of characters to the tty device using put_char().
- */
-static void cy_flush_chars(struct tty_struct *tty)
-{
- struct cyclades_port *info = tty->driver_data;
-
-#ifdef CY_DEBUG_IO
- printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
-#endif
-
- if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
- return;
-
- if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
- !info->port.xmit_buf)
- return;
-
- start_xmit(info);
-} /* cy_flush_chars */
-
-/*
- * This routine returns the numbers of characters the tty driver
- * will accept for queuing to be written. This number is subject
- * to change as output buffers get emptied, or if the output flow
- * control is activated.
- */
-static int cy_write_room(struct tty_struct *tty)
-{
- struct cyclades_port *info = tty->driver_data;
- int ret;
-
-#ifdef CY_DEBUG_IO
- printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
-#endif
-
- if (serial_paranoia_check(info, tty->name, "cy_write_room"))
- return 0;
- ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
- if (ret < 0)
- ret = 0;
- return ret;
-} /* cy_write_room */
-
-static int cy_chars_in_buffer(struct tty_struct *tty)
-{
- struct cyclades_port *info = tty->driver_data;
-
- if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
- return 0;
-
-#ifdef Z_EXT_CHARS_IN_BUFFER
- if (!cy_is_Z(info->card)) {
-#endif /* Z_EXT_CHARS_IN_BUFFER */
-#ifdef CY_DEBUG_IO
- printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
- info->line, info->xmit_cnt);
-#endif
- return info->xmit_cnt;
-#ifdef Z_EXT_CHARS_IN_BUFFER
- } else {
- struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
- int char_count;
- __u32 tx_put, tx_get, tx_bufsize;
-
- tx_get = readl(&buf_ctrl->tx_get);
- tx_put = readl(&buf_ctrl->tx_put);
- tx_bufsize = readl(&buf_ctrl->tx_bufsize);
- if (tx_put >= tx_get)
- char_count = tx_put - tx_get;
- else
- char_count = tx_put - tx_get + tx_bufsize;
-#ifdef CY_DEBUG_IO
- printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
- info->line, info->xmit_cnt + char_count);
-#endif
- return info->xmit_cnt + char_count;
- }
-#endif /* Z_EXT_CHARS_IN_BUFFER */
-} /* cy_chars_in_buffer */
-
-/*
- * ------------------------------------------------------------
- * cy_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
-{
- int co, co_val, bpr;
- __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
- 25000000);
-
- if (baud == 0) {
- info->tbpr = info->tco = info->rbpr = info->rco = 0;
- return;
- }
-
- /* determine which prescaler to use */
- for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
- if (cy_clock / co_val / baud > 63)
- break;
- }
-
- bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
- if (bpr > 255)
- bpr = 255;
-
- info->tbpr = info->rbpr = bpr;
- info->tco = info->rco = co;
-}
-
-/*
- * This routine finds or computes the various line characteristics.
- * It used to be called config_setup
- */
-static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
-{
- struct cyclades_card *card;
- unsigned long flags;
- int channel;
- unsigned cflag, iflag;
- int baud, baud_rate = 0;
- int i;
-
- if (!tty->termios) /* XXX can this happen at all? */
- return;
-
- if (info->line == -1)
- return;
-
- cflag = tty->termios->c_cflag;
- iflag = tty->termios->c_iflag;
-
- /*
- * Set up the tty->alt_speed kludge
- */
- if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
- tty->alt_speed = 57600;
- if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
- tty->alt_speed = 115200;
- if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
- tty->alt_speed = 230400;
- if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
- tty->alt_speed = 460800;
-
- card = info->card;
- channel = info->line - card->first_line;
-
- if (!cy_is_Z(card)) {
- u32 cflags;
-
- /* baud rate */
- baud = tty_get_baud_rate(tty);
- if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
- ASYNC_SPD_CUST) {
- if (info->custom_divisor)
- baud_rate = info->baud / info->custom_divisor;
- else
- baud_rate = info->baud;
- } else if (baud > CD1400_MAX_SPEED) {
- baud = CD1400_MAX_SPEED;
- }
- /* find the baud index */
- for (i = 0; i < 20; i++) {
- if (baud == baud_table[i])
- break;
- }
- if (i == 20)
- i = 19; /* CD1400_MAX_SPEED */
-
- if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
- ASYNC_SPD_CUST) {
- cyy_baud_calc(info, baud_rate);
- } else {
- if (info->chip_rev >= CD1400_REV_J) {
- /* It is a CD1400 rev. J or later */
- info->tbpr = baud_bpr_60[i]; /* Tx BPR */
- info->tco = baud_co_60[i]; /* Tx CO */
- info->rbpr = baud_bpr_60[i]; /* Rx BPR */
- info->rco = baud_co_60[i]; /* Rx CO */
- } else {
- info->tbpr = baud_bpr_25[i]; /* Tx BPR */
- info->tco = baud_co_25[i]; /* Tx CO */
- info->rbpr = baud_bpr_25[i]; /* Rx BPR */
- info->rco = baud_co_25[i]; /* Rx CO */
- }
- }
- if (baud_table[i] == 134) {
- /* get it right for 134.5 baud */
- info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
- 2;
- } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
- ASYNC_SPD_CUST) {
- info->timeout = (info->xmit_fifo_size * HZ * 15 /
- baud_rate) + 2;
- } else if (baud_table[i]) {
- info->timeout = (info->xmit_fifo_size * HZ * 15 /
- baud_table[i]) + 2;
- /* this needs to be propagated into the card info */
- } else {
- info->timeout = 0;
- }
- /* By tradition (is it a standard?) a baud rate of zero
- implies the line should be/has been closed. A bit
- later in this routine such a test is performed. */
-
- /* byte size and parity */
- info->cor5 = 0;
- info->cor4 = 0;
- /* receive threshold */
- info->cor3 = (info->default_threshold ?
- info->default_threshold : baud_cor3[i]);
- info->cor2 = CyETC;
- switch (cflag & CSIZE) {
- case CS5:
- info->cor1 = Cy_5_BITS;
- break;
- case CS6:
- info->cor1 = Cy_6_BITS;
- break;
- case CS7:
- info->cor1 = Cy_7_BITS;
- break;
- case CS8:
- info->cor1 = Cy_8_BITS;
- break;
- }
- if (cflag & CSTOPB)
- info->cor1 |= Cy_2_STOP;
-
- if (cflag & PARENB) {
- if (cflag & PARODD)
- info->cor1 |= CyPARITY_O;
- else
- info->cor1 |= CyPARITY_E;
- } else
- info->cor1 |= CyPARITY_NONE;
-
- /* CTS flow control flag */
- if (cflag & CRTSCTS) {
- info->port.flags |= ASYNC_CTS_FLOW;
- info->cor2 |= CyCtsAE;
- } else {
- info->port.flags &= ~ASYNC_CTS_FLOW;
- info->cor2 &= ~CyCtsAE;
- }
- if (cflag & CLOCAL)
- info->port.flags &= ~ASYNC_CHECK_CD;
- else
- info->port.flags |= ASYNC_CHECK_CD;
-
- /***********************************************
- The hardware option, CyRtsAO, presents RTS when
- the chip has characters to send. Since most modems
- use RTS as reverse (inbound) flow control, this
- option is not used. If inbound flow control is
- necessary, DTR can be programmed to provide the
- appropriate signals for use with a non-standard
- cable. Contact Marcio Saito for details.
- ***********************************************/
-
- channel &= 0x03;
-
- spin_lock_irqsave(&card->card_lock, flags);
- cyy_writeb(info, CyCAR, channel);
-
- /* tx and rx baud rate */
-
- cyy_writeb(info, CyTCOR, info->tco);
- cyy_writeb(info, CyTBPR, info->tbpr);
- cyy_writeb(info, CyRCOR, info->rco);
- cyy_writeb(info, CyRBPR, info->rbpr);
-
- /* set line characteristics according configuration */
-
- cyy_writeb(info, CySCHR1, START_CHAR(tty));
- cyy_writeb(info, CySCHR2, STOP_CHAR(tty));
- cyy_writeb(info, CyCOR1, info->cor1);
- cyy_writeb(info, CyCOR2, info->cor2);
- cyy_writeb(info, CyCOR3, info->cor3);
- cyy_writeb(info, CyCOR4, info->cor4);
- cyy_writeb(info, CyCOR5, info->cor5);
-
- cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
- CyCOR3ch);
-
- /* !!! Is this needed? */
- cyy_writeb(info, CyCAR, channel);
- cyy_writeb(info, CyRTPR,
- (info->default_timeout ? info->default_timeout : 0x02));
- /* 10ms rx timeout */
-
- cflags = CyCTS;
- if (!C_CLOCAL(tty))
- cflags |= CyDSR | CyRI | CyDCD;
- /* without modem intr */
- cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh);
- /* act on 1->0 modem transitions */
- if ((cflag & CRTSCTS) && info->rflow)
- cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]);
- else
- cyy_writeb(info, CyMCOR1, cflags);
- /* act on 0->1 modem transitions */
- cyy_writeb(info, CyMCOR2, cflags);
-
- if (i == 0) /* baud rate is zero, turn off line */
- cyy_change_rts_dtr(info, 0, TIOCM_DTR);
- else
- cyy_change_rts_dtr(info, TIOCM_DTR, 0);
-
- clear_bit(TTY_IO_ERROR, &tty->flags);
- spin_unlock_irqrestore(&card->card_lock, flags);
-
- } else {
- struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
- __u32 sw_flow;
- int retval;
-
- if (!cyz_is_loaded(card))
- return;
-
- /* baud rate */
- baud = tty_get_baud_rate(tty);
- if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
- ASYNC_SPD_CUST) {
- if (info->custom_divisor)
- baud_rate = info->baud / info->custom_divisor;
- else
- baud_rate = info->baud;
- } else if (baud > CYZ_MAX_SPEED) {
- baud = CYZ_MAX_SPEED;
- }
- cy_writel(&ch_ctrl->comm_baud, baud);
-
- if (baud == 134) {
- /* get it right for 134.5 baud */
- info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
- 2;
- } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
- ASYNC_SPD_CUST) {
- info->timeout = (info->xmit_fifo_size * HZ * 15 /
- baud_rate) + 2;
- } else if (baud) {
- info->timeout = (info->xmit_fifo_size * HZ * 15 /
- baud) + 2;
- /* this needs to be propagated into the card info */
- } else {
- info->timeout = 0;
- }
-
- /* byte size and parity */
- switch (cflag & CSIZE) {
- case CS5:
- cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
- break;
- case CS6:
- cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
- break;
- case CS7:
- cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
- break;
- case CS8:
- cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
- break;
- }
- if (cflag & CSTOPB) {
- cy_writel(&ch_ctrl->comm_data_l,
- readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
- } else {
- cy_writel(&ch_ctrl->comm_data_l,
- readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
- }
- if (cflag & PARENB) {
- if (cflag & PARODD)
- cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
- else
- cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
- } else
- cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
-
- /* CTS flow control flag */
- if (cflag & CRTSCTS) {
- cy_writel(&ch_ctrl->hw_flow,
- readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
- } else {
- cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
- ~(C_RS_CTS | C_RS_RTS));
- }
- /* As the HW flow control is done in firmware, the driver
- doesn't need to care about it */
- info->port.flags &= ~ASYNC_CTS_FLOW;
-
- /* XON/XOFF/XANY flow control flags */
- sw_flow = 0;
- if (iflag & IXON) {
- sw_flow |= C_FL_OXX;
- if (iflag & IXANY)
- sw_flow |= C_FL_OIXANY;
- }
- cy_writel(&ch_ctrl->sw_flow, sw_flow);
-
- retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
- if (retval != 0) {
- printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
- "was %x\n", info->line, retval);
- }
-
- /* CD sensitivity */
- if (cflag & CLOCAL)
- info->port.flags &= ~ASYNC_CHECK_CD;
- else
- info->port.flags |= ASYNC_CHECK_CD;
-
- if (baud == 0) { /* baud rate is zero, turn off line */
- cy_writel(&ch_ctrl->rs_control,
- readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
-#ifdef CY_DEBUG_DTR
- printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
-#endif
- } else {
- cy_writel(&ch_ctrl->rs_control,
- readl(&ch_ctrl->rs_control) | C_RS_DTR);
-#ifdef CY_DEBUG_DTR
- printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
-#endif
- }
-
- retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
- if (retval != 0) {
- printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
- "was %x\n", info->line, retval);
- }
-
- clear_bit(TTY_IO_ERROR, &tty->flags);
- }
-} /* set_line_char */
-
-static int cy_get_serial_info(struct cyclades_port *info,
- struct serial_struct __user *retinfo)
-{
- struct cyclades_card *cinfo = info->card;
- struct serial_struct tmp = {
- .type = info->type,
- .line = info->line,
- .port = (info->card - cy_card) * 0x100 + info->line -
- cinfo->first_line,
- .irq = cinfo->irq,
- .flags = info->port.flags,
- .close_delay = info->port.close_delay,
- .closing_wait = info->port.closing_wait,
- .baud_base = info->baud,
- .custom_divisor = info->custom_divisor,
- .hub6 = 0, /*!!! */
- };
- return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
-}
-
-static int
-cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
- struct serial_struct __user *new_info)
-{
- struct serial_struct new_serial;
- int ret;
-
- if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
- return -EFAULT;
-
- mutex_lock(&info->port.mutex);
- if (!capable(CAP_SYS_ADMIN)) {
- if (new_serial.close_delay != info->port.close_delay ||
- new_serial.baud_base != info->baud ||
- (new_serial.flags & ASYNC_FLAGS &
- ~ASYNC_USR_MASK) !=
- (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
- {
- mutex_unlock(&info->port.mutex);
- return -EPERM;
- }
- info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
- (new_serial.flags & ASYNC_USR_MASK);
- info->baud = new_serial.baud_base;
- info->custom_divisor = new_serial.custom_divisor;
- goto check_and_exit;
- }
-
- /*
- * OK, past this point, all the error checking has been done.
- * At this point, we start making changes.....
- */
-
- info->baud = new_serial.baud_base;
- info->custom_divisor = new_serial.custom_divisor;
- info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
- (new_serial.flags & ASYNC_FLAGS);
- info->port.close_delay = new_serial.close_delay * HZ / 100;
- info->port.closing_wait = new_serial.closing_wait * HZ / 100;
-
-check_and_exit:
- if (info->port.flags & ASYNC_INITIALIZED) {
- cy_set_line_char(info, tty);
- ret = 0;
- } else {
- ret = cy_startup(info, tty);
- }
- mutex_unlock(&info->port.mutex);
- return ret;
-} /* set_serial_info */
-
-/*
- * get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * is emptied. On bus types like RS485, the transmitter must
- * release the bus after transmitting. This must be done when
- * the transmit shift register is empty, not be done when the
- * transmit holding register is empty. This functionality
- * allows an RS485 driver to be written in user space.
- */
-static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
-{
- struct cyclades_card *card = info->card;
- unsigned int result;
- unsigned long flags;
- u8 status;
-
- if (!cy_is_Z(card)) {
- spin_lock_irqsave(&card->card_lock, flags);
- status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty);
- spin_unlock_irqrestore(&card->card_lock, flags);
- result = (status ? 0 : TIOCSER_TEMT);
- } else {
- /* Not supported yet */
- return -EINVAL;
- }
- return put_user(result, (unsigned long __user *)value);
-}
-
-static int cy_tiocmget(struct tty_struct *tty)
-{
- struct cyclades_port *info = tty->driver_data;
- struct cyclades_card *card;
- int result;
-
- if (serial_paranoia_check(info, tty->name, __func__))
- return -ENODEV;
-
- card = info->card;
-
- if (!cy_is_Z(card)) {
- unsigned long flags;
- int channel = info->line - card->first_line;
- u8 status;
-
- spin_lock_irqsave(&card->card_lock, flags);
- cyy_writeb(info, CyCAR, channel & 0x03);
- status = cyy_readb(info, CyMSVR1);
- status |= cyy_readb(info, CyMSVR2);
- spin_unlock_irqrestore(&card->card_lock, flags);
-
- if (info->rtsdtr_inv) {
- result = ((status & CyRTS) ? TIOCM_DTR : 0) |
- ((status & CyDTR) ? TIOCM_RTS : 0);
- } else {
- result = ((status & CyRTS) ? TIOCM_RTS : 0) |
- ((status & CyDTR) ? TIOCM_DTR : 0);
- }
- result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
- ((status & CyRI) ? TIOCM_RNG : 0) |
- ((status & CyDSR) ? TIOCM_DSR : 0) |
- ((status & CyCTS) ? TIOCM_CTS : 0);
- } else {
- u32 lstatus;
-
- if (!cyz_is_loaded(card)) {
- result = -ENODEV;
- goto end;
- }
-
- lstatus = readl(&info->u.cyz.ch_ctrl->rs_status);
- result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
- ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
- ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
- ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
- ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
- ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
- }
-end:
- return result;
-} /* cy_tiomget */
-
-static int
-cy_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- struct cyclades_port *info = tty->driver_data;
- struct cyclades_card *card;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->name, __func__))
- return -ENODEV;
-
- card = info->card;
- if (!cy_is_Z(card)) {
- spin_lock_irqsave(&card->card_lock, flags);
- cyy_change_rts_dtr(info, set, clear);
- spin_unlock_irqrestore(&card->card_lock, flags);
- } else {
- struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
- int retval, channel = info->line - card->first_line;
- u32 rs;
-
- if (!cyz_is_loaded(card))
- return -ENODEV;
-
- spin_lock_irqsave(&card->card_lock, flags);
- rs = readl(&ch_ctrl->rs_control);
- if (set & TIOCM_RTS)
- rs |= C_RS_RTS;
- if (clear & TIOCM_RTS)
- rs &= ~C_RS_RTS;
- if (set & TIOCM_DTR) {
- rs |= C_RS_DTR;
-#ifdef CY_DEBUG_DTR
- printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n");
-#endif
- }
- if (clear & TIOCM_DTR) {
- rs &= ~C_RS_DTR;
-#ifdef CY_DEBUG_DTR
- printk(KERN_DEBUG "cyc:set_modem_info clearing "
- "Z DTR\n");
-#endif
- }
- cy_writel(&ch_ctrl->rs_control, rs);
- retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
- spin_unlock_irqrestore(&card->card_lock, flags);
- if (retval != 0) {
- printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
- "was %x\n", info->line, retval);
- }
- }
- return 0;
-}
-
-/*
- * cy_break() --- routine which turns the break handling on or off
- */
-static int cy_break(struct tty_struct *tty, int break_state)
-{
- struct cyclades_port *info = tty->driver_data;
- struct cyclades_card *card;
- unsigned long flags;
- int retval = 0;
-
- if (serial_paranoia_check(info, tty->name, "cy_break"))
- return -EINVAL;
-
- card = info->card;
-
- spin_lock_irqsave(&card->card_lock, flags);
- if (!cy_is_Z(card)) {
- /* Let the transmit ISR take care of this (since it
- requires stuffing characters into the output stream).
- */
- if (break_state == -1) {
- if (!info->breakon) {
- info->breakon = 1;
- if (!info->xmit_cnt) {
- spin_unlock_irqrestore(&card->card_lock, flags);
- start_xmit(info);
- spin_lock_irqsave(&card->card_lock, flags);
- }
- }
- } else {
- if (!info->breakoff) {
- info->breakoff = 1;
- if (!info->xmit_cnt) {
- spin_unlock_irqrestore(&card->card_lock, flags);
- start_xmit(info);
- spin_lock_irqsave(&card->card_lock, flags);
- }
- }
- }
- } else {
- if (break_state == -1) {
- retval = cyz_issue_cmd(card,
- info->line - card->first_line,
- C_CM_SET_BREAK, 0L);
- if (retval != 0) {
- printk(KERN_ERR "cyc:cy_break (set) retval on "
- "ttyC%d was %x\n", info->line, retval);
- }
- } else {
- retval = cyz_issue_cmd(card,
- info->line - card->first_line,
- C_CM_CLR_BREAK, 0L);
- if (retval != 0) {
- printk(KERN_DEBUG "cyc:cy_break (clr) retval "
- "on ttyC%d was %x\n", info->line,
- retval);
- }
- }
- }
- spin_unlock_irqrestore(&card->card_lock, flags);
- return retval;
-} /* cy_break */
-
-static int set_threshold(struct cyclades_port *info, unsigned long value)
-{
- struct cyclades_card *card = info->card;
- unsigned long flags;
-
- if (!cy_is_Z(card)) {
- info->cor3 &= ~CyREC_FIFO;
- info->cor3 |= value & CyREC_FIFO;
-
- spin_lock_irqsave(&card->card_lock, flags);
- cyy_writeb(info, CyCOR3, info->cor3);
- cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch);
- spin_unlock_irqrestore(&card->card_lock, flags);
- }
- return 0;
-} /* set_threshold */
-
-static int get_threshold(struct cyclades_port *info,
- unsigned long __user *value)
-{
- struct cyclades_card *card = info->card;
-
- if (!cy_is_Z(card)) {
- u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO;
- return put_user(tmp, value);
- }
- return 0;
-} /* get_threshold */
-
-static int set_timeout(struct cyclades_port *info, unsigned long value)
-{
- struct cyclades_card *card = info->card;
- unsigned long flags;
-
- if (!cy_is_Z(card)) {
- spin_lock_irqsave(&card->card_lock, flags);
- cyy_writeb(info, CyRTPR, value & 0xff);
- spin_unlock_irqrestore(&card->card_lock, flags);
- }
- return 0;
-} /* set_timeout */
-
-static int get_timeout(struct cyclades_port *info,
- unsigned long __user *value)
-{
- struct cyclades_card *card = info->card;
-
- if (!cy_is_Z(card)) {
- u8 tmp = cyy_readb(info, CyRTPR);
- return put_user(tmp, value);
- }
- return 0;
-} /* get_timeout */
-
-static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg,
- struct cyclades_icount *cprev)
-{
- struct cyclades_icount cnow;
- unsigned long flags;
- int ret;
-
- spin_lock_irqsave(&info->card->card_lock, flags);
- cnow = info->icount; /* atomic copy */
- spin_unlock_irqrestore(&info->card->card_lock, flags);
-
- ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
- ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
- ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
- ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
-
- *cprev = cnow;
-
- return ret;
-}
-
-/*
- * This routine allows the tty driver to implement device-
- * specific ioctl's. If the ioctl number passed in cmd is
- * not recognized by the driver, it should return ENOIOCTLCMD.
- */
-static int
-cy_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct cyclades_port *info = tty->driver_data;
- struct cyclades_icount cnow; /* kernel counter temps */
- int ret_val = 0;
- unsigned long flags;
- void __user *argp = (void __user *)arg;
-
- if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
- return -ENODEV;
-
-#ifdef CY_DEBUG_OTHER
- printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
- info->line, cmd, arg);
-#endif
-
- switch (cmd) {
- case CYGETMON:
- if (copy_to_user(argp, &info->mon, sizeof(info->mon))) {
- ret_val = -EFAULT;
- break;
- }
- memset(&info->mon, 0, sizeof(info->mon));
- break;
- case CYGETTHRESH:
- ret_val = get_threshold(info, argp);
- break;
- case CYSETTHRESH:
- ret_val = set_threshold(info, arg);
- break;
- case CYGETDEFTHRESH:
- ret_val = put_user(info->default_threshold,
- (unsigned long __user *)argp);
- break;
- case CYSETDEFTHRESH:
- info->default_threshold = arg & 0x0f;
- break;
- case CYGETTIMEOUT:
- ret_val = get_timeout(info, argp);
- break;
- case CYSETTIMEOUT:
- ret_val = set_timeout(info, arg);
- break;
- case CYGETDEFTIMEOUT:
- ret_val = put_user(info->default_timeout,
- (unsigned long __user *)argp);
- break;
- case CYSETDEFTIMEOUT:
- info->default_timeout = arg & 0xff;
- break;
- case CYSETRFLOW:
- info->rflow = (int)arg;
- break;
- case CYGETRFLOW:
- ret_val = info->rflow;
- break;
- case CYSETRTSDTR_INV:
- info->rtsdtr_inv = (int)arg;
- break;
- case CYGETRTSDTR_INV:
- ret_val = info->rtsdtr_inv;
- break;
- case CYGETCD1400VER:
- ret_val = info->chip_rev;
- break;
-#ifndef CONFIG_CYZ_INTR
- case CYZSETPOLLCYCLE:
- cyz_polling_cycle = (arg * HZ) / 1000;
- break;
- case CYZGETPOLLCYCLE:
- ret_val = (cyz_polling_cycle * 1000) / HZ;
- break;
-#endif /* CONFIG_CYZ_INTR */
- case CYSETWAIT:
- info->port.closing_wait = (unsigned short)arg * HZ / 100;
- break;
- case CYGETWAIT:
- ret_val = info->port.closing_wait / (HZ / 100);
- break;
- case TIOCGSERIAL:
- ret_val = cy_get_serial_info(info, argp);
- break;
- case TIOCSSERIAL:
- ret_val = cy_set_serial_info(info, tty, argp);
- break;
- case TIOCSERGETLSR: /* Get line status register */
- ret_val = get_lsr_info(info, argp);
- break;
- /*
- * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
- * - mask passed in arg for lines of interest
- * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
- * Caller should use TIOCGICOUNT to see which one it was
- */
- case TIOCMIWAIT:
- spin_lock_irqsave(&info->card->card_lock, flags);
- /* note the counters on entry */
- cnow = info->icount;
- spin_unlock_irqrestore(&info->card->card_lock, flags);
- ret_val = wait_event_interruptible(info->port.delta_msr_wait,
- cy_cflags_changed(info, arg, &cnow));
- break;
-
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
- default:
- ret_val = -ENOIOCTLCMD;
- }
-
-#ifdef CY_DEBUG_OTHER
- printk(KERN_DEBUG "cyc:cy_ioctl done\n");
-#endif
- return ret_val;
-} /* cy_ioctl */
-
-static int cy_get_icount(struct tty_struct *tty,
- struct serial_icounter_struct *sic)
-{
- struct cyclades_port *info = tty->driver_data;
- struct cyclades_icount cnow; /* Used to snapshot */
- unsigned long flags;
-
- spin_lock_irqsave(&info->card->card_lock, flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->card->card_lock, flags);
-
- sic->cts = cnow.cts;
- sic->dsr = cnow.dsr;
- sic->rng = cnow.rng;
- sic->dcd = cnow.dcd;
- sic->rx = cnow.rx;
- sic->tx = cnow.tx;
- sic->frame = cnow.frame;
- sic->overrun = cnow.overrun;
- sic->parity = cnow.parity;
- sic->brk = cnow.brk;
- sic->buf_overrun = cnow.buf_overrun;
- return 0;
-}
-
-/*
- * This routine allows the tty driver to be notified when
- * device's termios settings have changed. Note that a
- * well-designed tty driver should be prepared to accept the case
- * where old == NULL, and try to do something rational.
- */
-static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
-{
- struct cyclades_port *info = tty->driver_data;
-
-#ifdef CY_DEBUG_OTHER
- printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
-#endif
-
- cy_set_line_char(info, tty);
-
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- cy_start(tty);
- }
-#if 0
- /*
- * No need to wake up processes in open wait, since they
- * sample the CLOCAL flag once, and don't recheck it.
- * XXX It's not clear whether the current behavior is correct
- * or not. Hence, this may change.....
- */
- if (!(old_termios->c_cflag & CLOCAL) &&
- (tty->termios->c_cflag & CLOCAL))
- wake_up_interruptible(&info->port.open_wait);
-#endif
-} /* cy_set_termios */
-
-/* This function is used to send a high-priority XON/XOFF character to
- the device.
-*/
-static void cy_send_xchar(struct tty_struct *tty, char ch)
-{
- struct cyclades_port *info = tty->driver_data;
- struct cyclades_card *card;
- int channel;
-
- if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
- return;
-
- info->x_char = ch;
-
- if (ch)
- cy_start(tty);
-
- card = info->card;
- channel = info->line - card->first_line;
-
- if (cy_is_Z(card)) {
- if (ch == STOP_CHAR(tty))
- cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
- else if (ch == START_CHAR(tty))
- cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
- }
-}
-
-/* This routine is called by the upper-layer tty layer to signal
- that incoming characters should be throttled because the input
- buffers are close to full.
- */
-static void cy_throttle(struct tty_struct *tty)
-{
- struct cyclades_port *info = tty->driver_data;
- struct cyclades_card *card;
- unsigned long flags;
-
-#ifdef CY_DEBUG_THROTTLE
- char buf[64];
-
- printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
- tty->ldisc.chars_in_buffer(tty), info->line);
-#endif
-
- if (serial_paranoia_check(info, tty->name, "cy_throttle"))
- return;
-
- card = info->card;
-
- if (I_IXOFF(tty)) {
- if (!cy_is_Z(card))
- cy_send_xchar(tty, STOP_CHAR(tty));
- else
- info->throttle = 1;
- }
-
- if (tty->termios->c_cflag & CRTSCTS) {
- if (!cy_is_Z(card)) {
- spin_lock_irqsave(&card->card_lock, flags);
- cyy_change_rts_dtr(info, 0, TIOCM_RTS);
- spin_unlock_irqrestore(&card->card_lock, flags);
- } else {
- info->throttle = 1;
- }
- }
-} /* cy_throttle */
-
-/*
- * This routine notifies the tty driver that it should signal
- * that characters can now be sent to the tty without fear of
- * overrunning the input buffers of the line disciplines.
- */
-static void cy_unthrottle(struct tty_struct *tty)
-{
- struct cyclades_port *info = tty->driver_data;
- struct cyclades_card *card;
- unsigned long flags;
-
-#ifdef CY_DEBUG_THROTTLE
- char buf[64];
-
- printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
- tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
-#endif
-
- if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
- return;
-
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else
- cy_send_xchar(tty, START_CHAR(tty));
- }
-
- if (tty->termios->c_cflag & CRTSCTS) {
- card = info->card;
- if (!cy_is_Z(card)) {
- spin_lock_irqsave(&card->card_lock, flags);
- cyy_change_rts_dtr(info, TIOCM_RTS, 0);
- spin_unlock_irqrestore(&card->card_lock, flags);
- } else {
- info->throttle = 0;
- }
- }
-} /* cy_unthrottle */
-
-/* cy_start and cy_stop provide software output flow control as a
- function of XON/XOFF, software CTS, and other such stuff.
-*/
-static void cy_stop(struct tty_struct *tty)
-{
- struct cyclades_card *cinfo;
- struct cyclades_port *info = tty->driver_data;
- int channel;
- unsigned long flags;
-
-#ifdef CY_DEBUG_OTHER
- printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
-#endif
-
- if (serial_paranoia_check(info, tty->name, "cy_stop"))
- return;
-
- cinfo = info->card;
- channel = info->line - cinfo->first_line;
- if (!cy_is_Z(cinfo)) {
- spin_lock_irqsave(&cinfo->card_lock, flags);
- cyy_writeb(info, CyCAR, channel & 0x03);
- cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
- spin_unlock_irqrestore(&cinfo->card_lock, flags);
- }
-} /* cy_stop */
-
-static void cy_start(struct tty_struct *tty)
-{
- struct cyclades_card *cinfo;
- struct cyclades_port *info = tty->driver_data;
- int channel;
- unsigned long flags;
-
-#ifdef CY_DEBUG_OTHER
- printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
-#endif
-
- if (serial_paranoia_check(info, tty->name, "cy_start"))
- return;
-
- cinfo = info->card;
- channel = info->line - cinfo->first_line;
- if (!cy_is_Z(cinfo)) {
- spin_lock_irqsave(&cinfo->card_lock, flags);
- cyy_writeb(info, CyCAR, channel & 0x03);
- cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
- spin_unlock_irqrestore(&cinfo->card_lock, flags);
- }
-} /* cy_start */
-
-/*
- * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
-static void cy_hangup(struct tty_struct *tty)
-{
- struct cyclades_port *info = tty->driver_data;
-
-#ifdef CY_DEBUG_OTHER
- printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
-#endif
-
- if (serial_paranoia_check(info, tty->name, "cy_hangup"))
- return;
-
- cy_flush_buffer(tty);
- cy_shutdown(info, tty);
- tty_port_hangup(&info->port);
-} /* cy_hangup */
-
-static int cyy_carrier_raised(struct tty_port *port)
-{
- struct cyclades_port *info = container_of(port, struct cyclades_port,
- port);
- struct cyclades_card *cinfo = info->card;
- unsigned long flags;
- int channel = info->line - cinfo->first_line;
- u32 cd;
-
- spin_lock_irqsave(&cinfo->card_lock, flags);
- cyy_writeb(info, CyCAR, channel & 0x03);
- cd = cyy_readb(info, CyMSVR1) & CyDCD;
- spin_unlock_irqrestore(&cinfo->card_lock, flags);
-
- return cd;
-}
-
-static void cyy_dtr_rts(struct tty_port *port, int raise)
-{
- struct cyclades_port *info = container_of(port, struct cyclades_port,
- port);
- struct cyclades_card *cinfo = info->card;
- unsigned long flags;
-
- spin_lock_irqsave(&cinfo->card_lock, flags);
- cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
- raise ? 0 : TIOCM_RTS | TIOCM_DTR);
- spin_unlock_irqrestore(&cinfo->card_lock, flags);
-}
-
-static int cyz_carrier_raised(struct tty_port *port)
-{
- struct cyclades_port *info = container_of(port, struct cyclades_port,
- port);
-
- return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD;
-}
-
-static void cyz_dtr_rts(struct tty_port *port, int raise)
-{
- struct cyclades_port *info = container_of(port, struct cyclades_port,
- port);
- struct cyclades_card *cinfo = info->card;
- struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
- int ret, channel = info->line - cinfo->first_line;
- u32 rs;
-
- rs = readl(&ch_ctrl->rs_control);
- if (raise)
- rs |= C_RS_RTS | C_RS_DTR;
- else
- rs &= ~(C_RS_RTS | C_RS_DTR);
- cy_writel(&ch_ctrl->rs_control, rs);
- ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
- if (ret != 0)
- printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
- __func__, info->line, ret);
-#ifdef CY_DEBUG_DTR
- printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
-#endif
-}
-
-static const struct tty_port_operations cyy_port_ops = {
- .carrier_raised = cyy_carrier_raised,
- .dtr_rts = cyy_dtr_rts,
- .shutdown = cy_do_close,
-};
-
-static const struct tty_port_operations cyz_port_ops = {
- .carrier_raised = cyz_carrier_raised,
- .dtr_rts = cyz_dtr_rts,
- .shutdown = cy_do_close,
-};
-
-/*
- * ---------------------------------------------------------------------
- * cy_init() and friends
- *
- * cy_init() is called at boot-time to initialize the serial driver.
- * ---------------------------------------------------------------------
- */
-
-static int __devinit cy_init_card(struct cyclades_card *cinfo)
-{
- struct cyclades_port *info;
- unsigned int channel, port;
-
- spin_lock_init(&cinfo->card_lock);
- cinfo->intr_enabled = 0;
-
- cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
- GFP_KERNEL);
- if (cinfo->ports == NULL) {
- printk(KERN_ERR "Cyclades: cannot allocate ports\n");
- return -ENOMEM;
- }
-
- for (channel = 0, port = cinfo->first_line; channel < cinfo->nports;
- channel++, port++) {
- info = &cinfo->ports[channel];
- tty_port_init(&info->port);
- info->magic = CYCLADES_MAGIC;
- info->card = cinfo;
- info->line = port;
-
- info->port.closing_wait = CLOSING_WAIT_DELAY;
- info->port.close_delay = 5 * HZ / 10;
- info->port.flags = STD_COM_FLAGS;
- init_completion(&info->shutdown_wait);
-
- if (cy_is_Z(cinfo)) {
- struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS;
- struct ZFW_CTRL *zfw_ctrl;
-
- info->port.ops = &cyz_port_ops;
- info->type = PORT_STARTECH;
-
- zfw_ctrl = cinfo->base_addr +
- (readl(&firm_id->zfwctrl_addr) & 0xfffff);
- info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel];
- info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
-
- if (cinfo->hw_ver == ZO_V1)
- info->xmit_fifo_size = CYZ_FIFO_SIZE;
- else
- info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
-#ifdef CONFIG_CYZ_INTR
- setup_timer(&cyz_rx_full_timer[port],
- cyz_rx_restart, (unsigned long)info);
-#endif
- } else {
- unsigned short chip_number;
- int index = cinfo->bus_index;
-
- info->port.ops = &cyy_port_ops;
- info->type = PORT_CIRRUS;
- info->xmit_fifo_size = CyMAX_CHAR_FIFO;
- info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
- info->cor2 = CyETC;
- info->cor3 = 0x08; /* _very_ small rcv threshold */
-
- chip_number = channel / CyPORTS_PER_CHIP;
- info->u.cyy.base_addr = cinfo->base_addr +
- (cy_chip_offset[chip_number] << index);
- info->chip_rev = cyy_readb(info, CyGFRCR);
-
- if (info->chip_rev >= CD1400_REV_J) {
- /* It is a CD1400 rev. J or later */
- info->tbpr = baud_bpr_60[13]; /* Tx BPR */
- info->tco = baud_co_60[13]; /* Tx CO */
- info->rbpr = baud_bpr_60[13]; /* Rx BPR */
- info->rco = baud_co_60[13]; /* Rx CO */
- info->rtsdtr_inv = 1;
- } else {
- info->tbpr = baud_bpr_25[13]; /* Tx BPR */
- info->tco = baud_co_25[13]; /* Tx CO */
- info->rbpr = baud_bpr_25[13]; /* Rx BPR */
- info->rco = baud_co_25[13]; /* Rx CO */
- info->rtsdtr_inv = 0;
- }
- info->read_status_mask = CyTIMEOUT | CySPECHAR |
- CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
- }
-
- }
-
-#ifndef CONFIG_CYZ_INTR
- if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
- mod_timer(&cyz_timerlist, jiffies + 1);
-#ifdef CY_PCI_DEBUG
- printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
-#endif
- }
-#endif
- return 0;
-}
-
-/* initialize chips on Cyclom-Y card -- return number of valid
- chips (which is number of ports/4) */
-static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
- int index)
-{
- unsigned int chip_number;
- void __iomem *base_addr;
-
- cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
- /* Cy_HwReset is 0x1400 */
- cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
- /* Cy_ClrIntr is 0x1800 */
- udelay(500L);
-
- for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
- chip_number++) {
- base_addr =
- true_base_addr + (cy_chip_offset[chip_number] << index);
- mdelay(1);
- if (readb(base_addr + (CyCCR << index)) != 0x00) {
- /*************
- printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
- chip_number, (unsigned long)base_addr);
- *************/
- return chip_number;
- }
-
- cy_writeb(base_addr + (CyGFRCR << index), 0);
- udelay(10L);
-
- /* The Cyclom-16Y does not decode address bit 9 and therefore
- cannot distinguish between references to chip 0 and a non-
- existent chip 4. If the preceding clearing of the supposed
- chip 4 GFRCR register appears at chip 0, there is no chip 4
- and this must be a Cyclom-16Y, not a Cyclom-32Ye.
- */
- if (chip_number == 4 && readb(true_base_addr +
- (cy_chip_offset[0] << index) +
- (CyGFRCR << index)) == 0) {
- return chip_number;
- }
-
- cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
- mdelay(1);
-
- if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
- /*
- printk(" chip #%d at %#6lx is not responding ",
- chip_number, (unsigned long)base_addr);
- printk("(GFRCR stayed 0)\n",
- */
- return chip_number;
- }
- if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
- 0x40) {
- /*
- printk(" chip #%d at %#6lx is not valid (GFRCR == "
- "%#2x)\n",
- chip_number, (unsigned long)base_addr,
- base_addr[CyGFRCR<<index]);
- */
- return chip_number;
- }
- cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
- if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
- /* It is a CD1400 rev. J or later */
- /* Impossible to reach 5ms with this chip.
- Changed to 2ms instead (f = 500 Hz). */
- cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
- } else {
- /* f = 200 Hz */
- cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
- }
-
- /*
- printk(" chip #%d at %#6lx is rev 0x%2x\n",
- chip_number, (unsigned long)base_addr,
- readb(base_addr+(CyGFRCR<<index)));
- */
- }
- return chip_number;
-} /* cyy_init_card */
-
-/*
- * ---------------------------------------------------------------------
- * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
- * sets global variables and return the number of ISA boards found.
- * ---------------------------------------------------------------------
- */
-static int __init cy_detect_isa(void)
-{
-#ifdef CONFIG_ISA
- unsigned short cy_isa_irq, nboard;
- void __iomem *cy_isa_address;
- unsigned short i, j, cy_isa_nchan;
- int isparam = 0;
-
- nboard = 0;
-
- /* Check for module parameters */
- for (i = 0; i < NR_CARDS; i++) {
- if (maddr[i] || i) {
- isparam = 1;
- cy_isa_addresses[i] = maddr[i];
- }
- if (!maddr[i])
- break;
- }
-
- /* scan the address table probing for Cyclom-Y/ISA boards */
- for (i = 0; i < NR_ISA_ADDRS; i++) {
- unsigned int isa_address = cy_isa_addresses[i];
- if (isa_address == 0x0000)
- return nboard;
-
- /* probe for CD1400... */
- cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
- if (cy_isa_address == NULL) {
- printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
- "address\n");
- continue;
- }
- cy_isa_nchan = CyPORTS_PER_CHIP *
- cyy_init_card(cy_isa_address, 0);
- if (cy_isa_nchan == 0) {
- iounmap(cy_isa_address);
- continue;
- }
-
- if (isparam && i < NR_CARDS && irq[i])
- cy_isa_irq = irq[i];
- else
- /* find out the board's irq by probing */
- cy_isa_irq = detect_isa_irq(cy_isa_address);
- if (cy_isa_irq == 0) {
- printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
- "IRQ could not be detected.\n",
- (unsigned long)cy_isa_address);
- iounmap(cy_isa_address);
- continue;
- }
-
- if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
- printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
- "more channels are available. Change NR_PORTS "
- "in cyclades.c and recompile kernel.\n",
- (unsigned long)cy_isa_address);
- iounmap(cy_isa_address);
- return nboard;
- }
- /* fill the next cy_card structure available */
- for (j = 0; j < NR_CARDS; j++) {
- if (cy_card[j].base_addr == NULL)
- break;
- }
- if (j == NR_CARDS) { /* no more cy_cards available */
- printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
- "more cards can be used. Change NR_CARDS in "
- "cyclades.c and recompile kernel.\n",
- (unsigned long)cy_isa_address);
- iounmap(cy_isa_address);
- return nboard;
- }
-
- /* allocate IRQ */
- if (request_irq(cy_isa_irq, cyy_interrupt,
- IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
- printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
- "could not allocate IRQ#%d.\n",
- (unsigned long)cy_isa_address, cy_isa_irq);
- iounmap(cy_isa_address);
- return nboard;
- }
-
- /* set cy_card */
- cy_card[j].base_addr = cy_isa_address;
- cy_card[j].ctl_addr.p9050 = NULL;
- cy_card[j].irq = (int)cy_isa_irq;
- cy_card[j].bus_index = 0;
- cy_card[j].first_line = cy_next_channel;
- cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
- cy_card[j].nports = cy_isa_nchan;
- if (cy_init_card(&cy_card[j])) {
- cy_card[j].base_addr = NULL;
- free_irq(cy_isa_irq, &cy_card[j]);
- iounmap(cy_isa_address);
- continue;
- }
- nboard++;
-
- printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
- "%d channels starting from port %d\n",
- j + 1, (unsigned long)cy_isa_address,
- (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
- cy_isa_irq, cy_isa_nchan, cy_next_channel);
-
- for (j = cy_next_channel;
- j < cy_next_channel + cy_isa_nchan; j++)
- tty_register_device(cy_serial_driver, j, NULL);
- cy_next_channel += cy_isa_nchan;
- }
- return nboard;
-#else
- return 0;
-#endif /* CONFIG_ISA */
-} /* cy_detect_isa */
-
-#ifdef CONFIG_PCI
-static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
-{
- unsigned int a;
-
- for (a = 0; a < size && *str; a++, str++)
- if (*str & 0x80)
- return -EINVAL;
-
- for (; a < size; a++, str++)
- if (*str)
- return -EINVAL;
-
- return 0;
-}
-
-static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
- unsigned int size)
-{
- for (; size > 0; size--) {
- cy_writel(fpga, *data++);
- udelay(10);
- }
-}
-
-static void __devinit plx_init(struct pci_dev *pdev, int irq,
- struct RUNTIME_9060 __iomem *addr)
-{
- /* Reset PLX */
- cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
- udelay(100L);
- cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
-
- /* Reload Config. Registers from EEPROM */
- cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
- udelay(100L);
- cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
-
- /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
- * the IRQ is lost and, thus, we have to re-write it to the PCI config.
- * registers. This will remain here until we find a permanent fix.
- */
- pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
-}
-
-static int __devinit __cyz_load_fw(const struct firmware *fw,
- const char *name, const u32 mailbox, void __iomem *base,
- void __iomem *fpga)
-{
- const void *ptr = fw->data;
- const struct zfile_header *h = ptr;
- const struct zfile_config *c, *cs;
- const struct zfile_block *b, *bs;
- unsigned int a, tmp, len = fw->size;
-#define BAD_FW KERN_ERR "Bad firmware: "
- if (len < sizeof(*h)) {
- printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
- return -EINVAL;
- }
-
- cs = ptr + h->config_offset;
- bs = ptr + h->block_offset;
-
- if ((void *)(cs + h->n_config) > ptr + len ||
- (void *)(bs + h->n_blocks) > ptr + len) {
- printk(BAD_FW "too short");
- return -EINVAL;
- }
-
- if (cyc_isfwstr(h->name, sizeof(h->name)) ||
- cyc_isfwstr(h->date, sizeof(h->date))) {
- printk(BAD_FW "bad formatted header string\n");
- return -EINVAL;
- }
-
- if (strncmp(name, h->name, sizeof(h->name))) {
- printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
- return -EINVAL;
- }
-
- tmp = 0;
- for (c = cs; c < cs + h->n_config; c++) {
- for (a = 0; a < c->n_blocks; a++)
- if (c->block_list[a] > h->n_blocks) {
- printk(BAD_FW "bad block ref number in cfgs\n");
- return -EINVAL;
- }
- if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
- tmp++;
- }
- if (!tmp) {
- printk(BAD_FW "nothing appropriate\n");
- return -EINVAL;
- }
-
- for (b = bs; b < bs + h->n_blocks; b++)
- if (b->file_offset + b->size > len) {
- printk(BAD_FW "bad block data offset\n");
- return -EINVAL;
- }
-
- /* everything is OK, let's seek'n'load it */
- for (c = cs; c < cs + h->n_config; c++)
- if (c->mailbox == mailbox && c->function == 0)
- break;
-
- for (a = 0; a < c->n_blocks; a++) {
- b = &bs[c->block_list[a]];
- if (b->type == ZBLOCK_FPGA) {
- if (fpga != NULL)
- cyz_fpga_copy(fpga, ptr + b->file_offset,
- b->size);
- } else {
- if (base != NULL)
- memcpy_toio(base + b->ram_offset,
- ptr + b->file_offset, b->size);
- }
- }
-#undef BAD_FW
- return 0;
-}
-
-static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
- struct RUNTIME_9060 __iomem *ctl_addr, int irq)
-{
- const struct firmware *fw;
- struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
- struct CUSTOM_REG __iomem *cust = base_addr;
- struct ZFW_CTRL __iomem *pt_zfwctrl;
- void __iomem *tmp;
- u32 mailbox, status, nchan;
- unsigned int i;
- int retval;
-
- retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
- if (retval) {
- dev_err(&pdev->dev, "can't get firmware\n");
- goto err;
- }
-
- /* Check whether the firmware is already loaded and running. If
- positive, skip this board */
- if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
- u32 cntval = readl(base_addr + 0x190);
-
- udelay(100);
- if (cntval != readl(base_addr + 0x190)) {
- /* FW counter is working, FW is running */
- dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
- "Skipping board.\n");
- retval = 0;
- goto err_rel;
- }
- }
-
- /* start boot */
- cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
- ~0x00030800UL);
-
- mailbox = readl(&ctl_addr->mail_box_0);
-
- if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
- /* stops CPU and set window to beginning of RAM */
- cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
- cy_writel(&cust->cpu_stop, 0);
- cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
- udelay(100);
- }
-
- plx_init(pdev, irq, ctl_addr);
-
- if (mailbox != 0) {
- /* load FPGA */
- retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
- base_addr);
- if (retval)
- goto err_rel;
- if (!__cyz_fpga_loaded(ctl_addr)) {
- dev_err(&pdev->dev, "fw upload successful, but fw is "
- "not loaded\n");
- goto err_rel;
- }
- }
-
- /* stops CPU and set window to beginning of RAM */
- cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
- cy_writel(&cust->cpu_stop, 0);
- cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
- udelay(100);
-
- /* clear memory */
- for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
- cy_writeb(tmp, 255);
- if (mailbox != 0) {
- /* set window to last 512K of RAM */
- cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
- for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
- cy_writeb(tmp, 255);
- /* set window to beginning of RAM */
- cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
- }
-
- retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
- release_firmware(fw);
- if (retval)
- goto err;
-
- /* finish boot and start boards */
- cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
- cy_writel(&cust->cpu_start, 0);
- cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
- i = 0;
- while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
- msleep(100);
- if (status != ZFIRM_ID) {
- if (status == ZFIRM_HLT) {
- dev_err(&pdev->dev, "you need an external power supply "
- "for this number of ports. Firmware halted and "
- "board reset.\n");
- retval = -EIO;
- goto err;
- }
- dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
- "some more time\n", status);
- while ((status = readl(&fid->signature)) != ZFIRM_ID &&
- i++ < 200)
- msleep(100);
- if (status != ZFIRM_ID) {
- dev_err(&pdev->dev, "Board not started in 20 seconds! "
- "Giving up. (fid->signature = 0x%x)\n",
- status);
- dev_info(&pdev->dev, "*** Warning ***: if you are "
- "upgrading the FW, please power cycle the "
- "system before loading the new FW to the "
- "Cyclades-Z.\n");
-
- if (__cyz_fpga_loaded(ctl_addr))
- plx_init(pdev, irq, ctl_addr);
-
- retval = -EIO;
- goto err;
- }
- dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
- i / 10);
- }
- pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
-
- dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
- base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
- base_addr + readl(&fid->zfwctrl_addr));
-
- nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
- dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
- readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
-
- if (nchan == 0) {
- dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
- "check the connection between the Z host card and the "
- "serial expanders.\n");
-
- if (__cyz_fpga_loaded(ctl_addr))
- plx_init(pdev, irq, ctl_addr);
-
- dev_info(&pdev->dev, "Null number of ports detected. Board "
- "reset.\n");
- retval = 0;
- goto err;
- }
-
- cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
- cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
-
- /*
- Early firmware failed to start looking for commands.
- This enables firmware interrupts for those commands.
- */
- cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
- (1 << 17));
- cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
- 0x00030800UL);
-
- return nchan;
-err_rel:
- release_firmware(fw);
-err:
- return retval;
-}
-
-static int __devinit cy_pci_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
- void __iomem *addr0 = NULL, *addr2 = NULL;
- char *card_name = NULL;
- u32 uninitialized_var(mailbox);
- unsigned int device_id, nchan = 0, card_no, i;
- unsigned char plx_ver;
- int retval, irq;
-
- retval = pci_enable_device(pdev);
- if (retval) {
- dev_err(&pdev->dev, "cannot enable device\n");
- goto err;
- }
-
- /* read PCI configuration area */
- irq = pdev->irq;
- device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
-
-#if defined(__alpha__)
- if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
- dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
- "addresses on Alpha systems.\n");
- retval = -EIO;
- goto err_dis;
- }
-#endif
- if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
- dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
- "addresses\n");
- retval = -EIO;
- goto err_dis;
- }
-
- if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
- dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
- "it...\n");
- pdev->resource[2].flags &= ~IORESOURCE_IO;
- }
-
- retval = pci_request_regions(pdev, "cyclades");
- if (retval) {
- dev_err(&pdev->dev, "failed to reserve resources\n");
- goto err_dis;
- }
-
- retval = -EIO;
- if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
- device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
- card_name = "Cyclom-Y";
-
- addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
- CyPCI_Yctl);
- if (addr0 == NULL) {
- dev_err(&pdev->dev, "can't remap ctl region\n");
- goto err_reg;
- }
- addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
- CyPCI_Ywin);
- if (addr2 == NULL) {
- dev_err(&pdev->dev, "can't remap base region\n");
- goto err_unmap;
- }
-
- nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
- if (nchan == 0) {
- dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
- "Serial-Modules\n");
- goto err_unmap;
- }
- } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
- struct RUNTIME_9060 __iomem *ctl_addr;
-
- ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
- CyPCI_Zctl);
- if (addr0 == NULL) {
- dev_err(&pdev->dev, "can't remap ctl region\n");
- goto err_reg;
- }
-
- /* Disable interrupts on the PLX before resetting it */
- cy_writew(&ctl_addr->intr_ctrl_stat,
- readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
-
- plx_init(pdev, irq, addr0);
-
- mailbox = readl(&ctl_addr->mail_box_0);
-
- addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
- mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
- if (addr2 == NULL) {
- dev_err(&pdev->dev, "can't remap base region\n");
- goto err_unmap;
- }
-
- if (mailbox == ZE_V1) {
- card_name = "Cyclades-Ze";
- } else {
- card_name = "Cyclades-8Zo";
-#ifdef CY_PCI_DEBUG
- if (mailbox == ZO_V1) {
- cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
- dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
- "id %lx, ver %lx\n", (ulong)(0xff &
- readl(&((struct CUSTOM_REG *)addr2)->
- fpga_id)), (ulong)(0xff &
- readl(&((struct CUSTOM_REG *)addr2)->
- fpga_version)));
- cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
- } else {
- dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
- "Cyclades-Z board. FPGA not loaded\n");
- }
-#endif
- /* The following clears the firmware id word. This
- ensures that the driver will not attempt to talk to
- the board until it has been properly initialized.
- */
- if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
- cy_writel(addr2 + ID_ADDRESS, 0L);
- }
-
- retval = cyz_load_fw(pdev, addr2, addr0, irq);
- if (retval <= 0)
- goto err_unmap;
- nchan = retval;
- }
-
- if ((cy_next_channel + nchan) > NR_PORTS) {
- dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
- "channels are available. Change NR_PORTS in "
- "cyclades.c and recompile kernel.\n");
- goto err_unmap;
- }
- /* fill the next cy_card structure available */
- for (card_no = 0; card_no < NR_CARDS; card_no++) {
- if (cy_card[card_no].base_addr == NULL)
- break;
- }
- if (card_no == NR_CARDS) { /* no more cy_cards available */
- dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
- "more cards can be used. Change NR_CARDS in "
- "cyclades.c and recompile kernel.\n");
- goto err_unmap;
- }
-
- if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
- device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
- /* allocate IRQ */
- retval = request_irq(irq, cyy_interrupt,
- IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
- if (retval) {
- dev_err(&pdev->dev, "could not allocate IRQ\n");
- goto err_unmap;
- }
- cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP;
- } else {
- struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS;
- struct ZFW_CTRL __iomem *zfw_ctrl;
-
- zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
-
- cy_card[card_no].hw_ver = mailbox;
- cy_card[card_no].num_chips = (unsigned int)-1;
- cy_card[card_no].board_ctrl = &zfw_ctrl->board_ctrl;
-#ifdef CONFIG_CYZ_INTR
- /* allocate IRQ only if board has an IRQ */
- if (irq != 0 && irq != 255) {
- retval = request_irq(irq, cyz_interrupt,
- IRQF_SHARED, "Cyclades-Z",
- &cy_card[card_no]);
- if (retval) {
- dev_err(&pdev->dev, "could not allocate IRQ\n");
- goto err_unmap;
- }
- }
-#endif /* CONFIG_CYZ_INTR */
- }
-
- /* set cy_card */
- cy_card[card_no].base_addr = addr2;
- cy_card[card_no].ctl_addr.p9050 = addr0;
- cy_card[card_no].irq = irq;
- cy_card[card_no].bus_index = 1;
- cy_card[card_no].first_line = cy_next_channel;
- cy_card[card_no].nports = nchan;
- retval = cy_init_card(&cy_card[card_no]);
- if (retval)
- goto err_null;
-
- pci_set_drvdata(pdev, &cy_card[card_no]);
-
- if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
- device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
- /* enable interrupts in the PCI interface */
- plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
- switch (plx_ver) {
- case PLX_9050:
- cy_writeb(addr0 + 0x4c, 0x43);
- break;
-
- case PLX_9060:
- case PLX_9080:
- default: /* Old boards, use PLX_9060 */
- {
- struct RUNTIME_9060 __iomem *ctl_addr = addr0;
- plx_init(pdev, irq, ctl_addr);
- cy_writew(&ctl_addr->intr_ctrl_stat,
- readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
- break;
- }
- }
- }
-
- dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
- "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
- for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
- tty_register_device(cy_serial_driver, i, &pdev->dev);
- cy_next_channel += nchan;
-
- return 0;
-err_null:
- cy_card[card_no].base_addr = NULL;
- free_irq(irq, &cy_card[card_no]);
-err_unmap:
- iounmap(addr0);
- if (addr2)
- iounmap(addr2);
-err_reg:
- pci_release_regions(pdev);
-err_dis:
- pci_disable_device(pdev);
-err:
- return retval;
-}
-
-static void __devexit cy_pci_remove(struct pci_dev *pdev)
-{
- struct cyclades_card *cinfo = pci_get_drvdata(pdev);
- unsigned int i;
-
- /* non-Z with old PLX */
- if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
- PLX_9050)
- cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
- else
-#ifndef CONFIG_CYZ_INTR
- if (!cy_is_Z(cinfo))
-#endif
- cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
- readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
- ~0x0900);
-
- iounmap(cinfo->base_addr);
- if (cinfo->ctl_addr.p9050)
- iounmap(cinfo->ctl_addr.p9050);
- if (cinfo->irq
-#ifndef CONFIG_CYZ_INTR
- && !cy_is_Z(cinfo)
-#endif /* CONFIG_CYZ_INTR */
- )
- free_irq(cinfo->irq, cinfo);
- pci_release_regions(pdev);
-
- cinfo->base_addr = NULL;
- for (i = cinfo->first_line; i < cinfo->first_line +
- cinfo->nports; i++)
- tty_unregister_device(cy_serial_driver, i);
- cinfo->nports = 0;
- kfree(cinfo->ports);
-}
-
-static struct pci_driver cy_pci_driver = {
- .name = "cyclades",
- .id_table = cy_pci_dev_id,
- .probe = cy_pci_probe,
- .remove = __devexit_p(cy_pci_remove)
-};
-#endif
-
-static int cyclades_proc_show(struct seq_file *m, void *v)
-{
- struct cyclades_port *info;
- unsigned int i, j;
- __u32 cur_jifs = jiffies;
-
- seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
- "IdleIn Overruns Ldisc\n");
-
- /* Output one line for each known port */
- for (i = 0; i < NR_CARDS; i++)
- for (j = 0; j < cy_card[i].nports; j++) {
- info = &cy_card[i].ports[j];
-
- if (info->port.count) {
- /* XXX is the ldisc num worth this? */
- struct tty_struct *tty;
- struct tty_ldisc *ld;
- int num = 0;
- tty = tty_port_tty_get(&info->port);
- if (tty) {
- ld = tty_ldisc_ref(tty);
- if (ld) {
- num = ld->ops->num;
- tty_ldisc_deref(ld);
- }
- tty_kref_put(tty);
- }
- seq_printf(m, "%3d %8lu %10lu %8lu "
- "%10lu %8lu %9lu %6d\n", info->line,
- (cur_jifs - info->idle_stats.in_use) /
- HZ, info->idle_stats.xmit_bytes,
- (cur_jifs - info->idle_stats.xmit_idle)/
- HZ, info->idle_stats.recv_bytes,
- (cur_jifs - info->idle_stats.recv_idle)/
- HZ, info->idle_stats.overruns,
- num);
- } else
- seq_printf(m, "%3d %8lu %10lu %8lu "
- "%10lu %8lu %9lu %6ld\n",
- info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
- }
- return 0;
-}
-
-static int cyclades_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, cyclades_proc_show, NULL);
-}
-
-static const struct file_operations cyclades_proc_fops = {
- .owner = THIS_MODULE,
- .open = cyclades_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-/* The serial driver boot-time initialization code!
- Hardware I/O ports are mapped to character special devices on a
- first found, first allocated manner. That is, this code searches
- for Cyclom cards in the system. As each is found, it is probed
- to discover how many chips (and thus how many ports) are present.
- These ports are mapped to the tty ports 32 and upward in monotonic
- fashion. If an 8-port card is replaced with a 16-port card, the
- port mapping on a following card will shift.
-
- This approach is different from what is used in the other serial
- device driver because the Cyclom is more properly a multiplexer,
- not just an aggregation of serial ports on one card.
-
- If there are more cards with more ports than have been
- statically allocated above, a warning is printed and the
- extra ports are ignored.
- */
-
-static const struct tty_operations cy_ops = {
- .open = cy_open,
- .close = cy_close,
- .write = cy_write,
- .put_char = cy_put_char,
- .flush_chars = cy_flush_chars,
- .write_room = cy_write_room,
- .chars_in_buffer = cy_chars_in_buffer,
- .flush_buffer = cy_flush_buffer,
- .ioctl = cy_ioctl,
- .throttle = cy_throttle,
- .unthrottle = cy_unthrottle,
- .set_termios = cy_set_termios,
- .stop = cy_stop,
- .start = cy_start,
- .hangup = cy_hangup,
- .break_ctl = cy_break,
- .wait_until_sent = cy_wait_until_sent,
- .tiocmget = cy_tiocmget,
- .tiocmset = cy_tiocmset,
- .get_icount = cy_get_icount,
- .proc_fops = &cyclades_proc_fops,
-};
-
-static int __init cy_init(void)
-{
- unsigned int nboards;
- int retval = -ENOMEM;
-
- cy_serial_driver = alloc_tty_driver(NR_PORTS);
- if (!cy_serial_driver)
- goto err;
-
- printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
- __DATE__, __TIME__);
-
- /* Initialize the tty_driver structure */
-
- cy_serial_driver->owner = THIS_MODULE;
- cy_serial_driver->driver_name = "cyclades";
- cy_serial_driver->name = "ttyC";
- cy_serial_driver->major = CYCLADES_MAJOR;
- cy_serial_driver->minor_start = 0;
- cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
- cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
- cy_serial_driver->init_termios = tty_std_termios;
- cy_serial_driver->init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
- tty_set_operations(cy_serial_driver, &cy_ops);
-
- retval = tty_register_driver(cy_serial_driver);
- if (retval) {
- printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
- goto err_frtty;
- }
-
- /* the code below is responsible to find the boards. Each different
- type of board has its own detection routine. If a board is found,
- the next cy_card structure available is set by the detection
- routine. These functions are responsible for checking the
- availability of cy_card and cy_port data structures and updating
- the cy_next_channel. */
-
- /* look for isa boards */
- nboards = cy_detect_isa();
-
-#ifdef CONFIG_PCI
- /* look for pci boards */
- retval = pci_register_driver(&cy_pci_driver);
- if (retval && !nboards) {
- tty_unregister_driver(cy_serial_driver);
- goto err_frtty;
- }
-#endif
-
- return 0;
-err_frtty:
- put_tty_driver(cy_serial_driver);
-err:
- return retval;
-} /* cy_init */
-
-static void __exit cy_cleanup_module(void)
-{
- struct cyclades_card *card;
- unsigned int i, e1;
-
-#ifndef CONFIG_CYZ_INTR
- del_timer_sync(&cyz_timerlist);
-#endif /* CONFIG_CYZ_INTR */
-
- e1 = tty_unregister_driver(cy_serial_driver);
- if (e1)
- printk(KERN_ERR "failed to unregister Cyclades serial "
- "driver(%d)\n", e1);
-
-#ifdef CONFIG_PCI
- pci_unregister_driver(&cy_pci_driver);
-#endif
-
- for (i = 0; i < NR_CARDS; i++) {
- card = &cy_card[i];
- if (card->base_addr) {
- /* clear interrupt */
- cy_writeb(card->base_addr + Cy_ClrIntr, 0);
- iounmap(card->base_addr);
- if (card->ctl_addr.p9050)
- iounmap(card->ctl_addr.p9050);
- if (card->irq
-#ifndef CONFIG_CYZ_INTR
- && !cy_is_Z(card)
-#endif /* CONFIG_CYZ_INTR */
- )
- free_irq(card->irq, card);
- for (e1 = card->first_line; e1 < card->first_line +
- card->nports; e1++)
- tty_unregister_device(cy_serial_driver, e1);
- kfree(card->ports);
- }
- }
-
- put_tty_driver(cy_serial_driver);
-} /* cy_cleanup_module */
-
-module_init(cy_init);
-module_exit(cy_cleanup_module);
-
-MODULE_LICENSE("GPL");
-MODULE_VERSION(CY_VERSION);
-MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
-MODULE_FIRMWARE("cyzfirm.bin");
+++ /dev/null
-/*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Original driver code supplied by Multi-Tech
- *
- * Changes
- * 1/9/98 alan@lxorguk.ukuu.org.uk
- * Merge to 2.0.x kernel tree
- * Obtain and use official major/minors
- * Loader switched to a misc device
- * (fixed range check bug as a side effect)
- * Printk clean up
- * 9/12/98 alan@lxorguk.ukuu.org.uk
- * Rough port to 2.1.x
- *
- * 10/6/99 sameer Merged the ISA and PCI drivers to
- * a new unified driver.
- *
- * 3/9/99 sameer Added support for ISI4616 cards.
- *
- * 16/9/99 sameer We do not force RTS low anymore.
- * This is to prevent the firmware
- * from getting confused.
- *
- * 26/10/99 sameer Cosmetic changes:The driver now
- * dumps the Port Count information
- * along with I/O address and IRQ.
- *
- * 13/12/99 sameer Fixed the problem with IRQ sharing.
- *
- * 10/5/00 sameer Fixed isicom_shutdown_board()
- * to not lower DTR on all the ports
- * when the last port on the card is
- * closed.
- *
- * 10/5/00 sameer Signal mask setup command added
- * to isicom_setup_port and
- * isicom_shutdown_port.
- *
- * 24/5/00 sameer The driver is now SMP aware.
- *
- *
- * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
- *
- *
- * 03/01/01 anil .s Added support for resetting the
- * internal modems on ISI cards.
- *
- * 08/02/01 anil .s Upgraded the driver for kernel
- * 2.4.x
- *
- * 11/04/01 Kevin Fixed firmware load problem with
- * ISIHP-4X card
- *
- * 30/04/01 anil .s Fixed the remote login through
- * ISI port problem. Now the link
- * does not go down before password
- * prompt.
- *
- * 03/05/01 anil .s Fixed the problem with IRQ sharing
- * among ISI-PCI cards.
- *
- * 03/05/01 anil .s Added support to display the version
- * info during insmod as well as module
- * listing by lsmod.
- *
- * 10/05/01 anil .s Done the modifications to the source
- * file and Install script so that the
- * same installation can be used for
- * 2.2.x and 2.4.x kernel.
- *
- * 06/06/01 anil .s Now we drop both dtr and rts during
- * shutdown_port as well as raise them
- * during isicom_config_port.
- *
- * 09/06/01 acme@conectiva.com.br use capable, not suser, do
- * restore_flags on failure in
- * isicom_send_break, verify put_user
- * result
- *
- * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
- * Baud index extended to 21
- *
- * 20/03/03 ranjeeth Made to work for Linux Advanced server.
- * Taken care of license warning.
- *
- * 10/12/03 Ravindra Made to work for Fedora Core 1 of
- * Red Hat Distribution
- *
- * 06/01/05 Alan Cox Merged the ISI and base kernel strands
- * into a single 2.6 driver
- *
- * ***********************************************************
- *
- * To use this driver you also need the support package. You
- * can find this in RPM format on
- * ftp://ftp.linux.org.uk/pub/linux/alan
- *
- * You can find the original tools for this direct from Multitech
- * ftp://ftp.multitech.com/ISI-Cards/
- *
- * Having installed the cards the module options (/etc/modprobe.conf)
- *
- * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
- *
- * Omit those entries for boards you don't have installed.
- *
- * TODO
- * Merge testing
- * 64-bit verification
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/firmware.h>
-#include <linux/kernel.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/termios.h>
-#include <linux/fs.h>
-#include <linux/sched.h>
-#include <linux/serial.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/timer.h>
-#include <linux/delay.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-
-#include <linux/uaccess.h>
-#include <linux/io.h>
-#include <asm/system.h>
-
-#include <linux/pci.h>
-
-#include <linux/isicom.h>
-
-#define InterruptTheCard(base) outw(0, (base) + 0xc)
-#define ClearInterrupt(base) inw((base) + 0x0a)
-
-#ifdef DEBUG
-#define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
-#else
-#define isicom_paranoia_check(a, b, c) 0
-#endif
-
-static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
-static void __devexit isicom_remove(struct pci_dev *);
-
-static struct pci_device_id isicom_pci_tbl[] = {
- { PCI_DEVICE(VENDOR_ID, 0x2028) },
- { PCI_DEVICE(VENDOR_ID, 0x2051) },
- { PCI_DEVICE(VENDOR_ID, 0x2052) },
- { PCI_DEVICE(VENDOR_ID, 0x2053) },
- { PCI_DEVICE(VENDOR_ID, 0x2054) },
- { PCI_DEVICE(VENDOR_ID, 0x2055) },
- { PCI_DEVICE(VENDOR_ID, 0x2056) },
- { PCI_DEVICE(VENDOR_ID, 0x2057) },
- { PCI_DEVICE(VENDOR_ID, 0x2058) },
- { 0 }
-};
-MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
-
-static struct pci_driver isicom_driver = {
- .name = "isicom",
- .id_table = isicom_pci_tbl,
- .probe = isicom_probe,
- .remove = __devexit_p(isicom_remove)
-};
-
-static int prev_card = 3; /* start servicing isi_card[0] */
-static struct tty_driver *isicom_normal;
-
-static void isicom_tx(unsigned long _data);
-static void isicom_start(struct tty_struct *tty);
-
-static DEFINE_TIMER(tx, isicom_tx, 0, 0);
-
-/* baud index mappings from linux defns to isi */
-
-static signed char linuxb_to_isib[] = {
- -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
-};
-
-struct isi_board {
- unsigned long base;
- int irq;
- unsigned char port_count;
- unsigned short status;
- unsigned short port_status; /* each bit for each port */
- unsigned short shift_count;
- struct isi_port *ports;
- signed char count;
- spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
- unsigned long flags;
- unsigned int index;
-};
-
-struct isi_port {
- unsigned short magic;
- struct tty_port port;
- u16 channel;
- u16 status;
- struct isi_board *card;
- unsigned char *xmit_buf;
- int xmit_head;
- int xmit_tail;
- int xmit_cnt;
-};
-
-static struct isi_board isi_card[BOARD_COUNT];
-static struct isi_port isi_ports[PORT_COUNT];
-
-/*
- * Locking functions for card level locking. We need to own both
- * the kernel lock for the card and have the card in a position that
- * it wants to talk.
- */
-
-static inline int WaitTillCardIsFree(unsigned long base)
-{
- unsigned int count = 0;
- unsigned int a = in_atomic(); /* do we run under spinlock? */
-
- while (!(inw(base + 0xe) & 0x1) && count++ < 100)
- if (a)
- mdelay(1);
- else
- msleep(1);
-
- return !(inw(base + 0xe) & 0x1);
-}
-
-static int lock_card(struct isi_board *card)
-{
- unsigned long base = card->base;
- unsigned int retries, a;
-
- for (retries = 0; retries < 10; retries++) {
- spin_lock_irqsave(&card->card_lock, card->flags);
- for (a = 0; a < 10; a++) {
- if (inw(base + 0xe) & 0x1)
- return 1;
- udelay(10);
- }
- spin_unlock_irqrestore(&card->card_lock, card->flags);
- msleep(10);
- }
- pr_warning("Failed to lock Card (0x%lx)\n", card->base);
-
- return 0; /* Failed to acquire the card! */
-}
-
-static void unlock_card(struct isi_board *card)
-{
- spin_unlock_irqrestore(&card->card_lock, card->flags);
-}
-
-/*
- * ISI Card specific ops ...
- */
-
-/* card->lock HAS to be held */
-static void raise_dtr(struct isi_port *port)
-{
- struct isi_board *card = port->card;
- unsigned long base = card->base;
- u16 channel = port->channel;
-
- if (WaitTillCardIsFree(base))
- return;
-
- outw(0x8000 | (channel << card->shift_count) | 0x02, base);
- outw(0x0504, base);
- InterruptTheCard(base);
- port->status |= ISI_DTR;
-}
-
-/* card->lock HAS to be held */
-static inline void drop_dtr(struct isi_port *port)
-{
- struct isi_board *card = port->card;
- unsigned long base = card->base;
- u16 channel = port->channel;
-
- if (WaitTillCardIsFree(base))
- return;
-
- outw(0x8000 | (channel << card->shift_count) | 0x02, base);
- outw(0x0404, base);
- InterruptTheCard(base);
- port->status &= ~ISI_DTR;
-}
-
-/* card->lock HAS to be held */
-static inline void raise_rts(struct isi_port *port)
-{
- struct isi_board *card = port->card;
- unsigned long base = card->base;
- u16 channel = port->channel;
-
- if (WaitTillCardIsFree(base))
- return;
-
- outw(0x8000 | (channel << card->shift_count) | 0x02, base);
- outw(0x0a04, base);
- InterruptTheCard(base);
- port->status |= ISI_RTS;
-}
-
-/* card->lock HAS to be held */
-static inline void drop_rts(struct isi_port *port)
-{
- struct isi_board *card = port->card;
- unsigned long base = card->base;
- u16 channel = port->channel;
-
- if (WaitTillCardIsFree(base))
- return;
-
- outw(0x8000 | (channel << card->shift_count) | 0x02, base);
- outw(0x0804, base);
- InterruptTheCard(base);
- port->status &= ~ISI_RTS;
-}
-
-/* card->lock MUST NOT be held */
-
-static void isicom_dtr_rts(struct tty_port *port, int on)
-{
- struct isi_port *ip = container_of(port, struct isi_port, port);
- struct isi_board *card = ip->card;
- unsigned long base = card->base;
- u16 channel = ip->channel;
-
- if (!lock_card(card))
- return;
-
- if (on) {
- outw(0x8000 | (channel << card->shift_count) | 0x02, base);
- outw(0x0f04, base);
- InterruptTheCard(base);
- ip->status |= (ISI_DTR | ISI_RTS);
- } else {
- outw(0x8000 | (channel << card->shift_count) | 0x02, base);
- outw(0x0C04, base);
- InterruptTheCard(base);
- ip->status &= ~(ISI_DTR | ISI_RTS);
- }
- unlock_card(card);
-}
-
-/* card->lock HAS to be held */
-static void drop_dtr_rts(struct isi_port *port)
-{
- struct isi_board *card = port->card;
- unsigned long base = card->base;
- u16 channel = port->channel;
-
- if (WaitTillCardIsFree(base))
- return;
-
- outw(0x8000 | (channel << card->shift_count) | 0x02, base);
- outw(0x0c04, base);
- InterruptTheCard(base);
- port->status &= ~(ISI_RTS | ISI_DTR);
-}
-
-/*
- * ISICOM Driver specific routines ...
- *
- */
-
-static inline int __isicom_paranoia_check(struct isi_port const *port,
- char *name, const char *routine)
-{
- if (!port) {
- pr_warning("Warning: bad isicom magic for dev %s in %s.\n",
- name, routine);
- return 1;
- }
- if (port->magic != ISICOM_MAGIC) {
- pr_warning("Warning: NULL isicom port for dev %s in %s.\n",
- name, routine);
- return 1;
- }
-
- return 0;
-}
-
-/*
- * Transmitter.
- *
- * We shovel data into the card buffers on a regular basis. The card
- * will do the rest of the work for us.
- */
-
-static void isicom_tx(unsigned long _data)
-{
- unsigned long flags, base;
- unsigned int retries;
- short count = (BOARD_COUNT-1), card;
- short txcount, wrd, residue, word_count, cnt;
- struct isi_port *port;
- struct tty_struct *tty;
-
- /* find next active board */
- card = (prev_card + 1) & 0x0003;
- while (count-- > 0) {
- if (isi_card[card].status & BOARD_ACTIVE)
- break;
- card = (card + 1) & 0x0003;
- }
- if (!(isi_card[card].status & BOARD_ACTIVE))
- goto sched_again;
-
- prev_card = card;
-
- count = isi_card[card].port_count;
- port = isi_card[card].ports;
- base = isi_card[card].base;
-
- spin_lock_irqsave(&isi_card[card].card_lock, flags);
- for (retries = 0; retries < 100; retries++) {
- if (inw(base + 0xe) & 0x1)
- break;
- udelay(2);
- }
- if (retries >= 100)
- goto unlock;
-
- tty = tty_port_tty_get(&port->port);
- if (tty == NULL)
- goto put_unlock;
-
- for (; count > 0; count--, port++) {
- /* port not active or tx disabled to force flow control */
- if (!(port->port.flags & ASYNC_INITIALIZED) ||
- !(port->status & ISI_TXOK))
- continue;
-
- txcount = min_t(short, TX_SIZE, port->xmit_cnt);
- if (txcount <= 0 || tty->stopped || tty->hw_stopped)
- continue;
-
- if (!(inw(base + 0x02) & (1 << port->channel)))
- continue;
-
- pr_debug("txing %d bytes, port%d.\n",
- txcount, port->channel + 1);
- outw((port->channel << isi_card[card].shift_count) | txcount,
- base);
- residue = NO;
- wrd = 0;
- while (1) {
- cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
- - port->xmit_tail));
- if (residue == YES) {
- residue = NO;
- if (cnt > 0) {
- wrd |= (port->port.xmit_buf[port->xmit_tail]
- << 8);
- port->xmit_tail = (port->xmit_tail + 1)
- & (SERIAL_XMIT_SIZE - 1);
- port->xmit_cnt--;
- txcount--;
- cnt--;
- outw(wrd, base);
- } else {
- outw(wrd, base);
- break;
- }
- }
- if (cnt <= 0)
- break;
- word_count = cnt >> 1;
- outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
- port->xmit_tail = (port->xmit_tail
- + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
- txcount -= (word_count << 1);
- port->xmit_cnt -= (word_count << 1);
- if (cnt & 0x0001) {
- residue = YES;
- wrd = port->port.xmit_buf[port->xmit_tail];
- port->xmit_tail = (port->xmit_tail + 1)
- & (SERIAL_XMIT_SIZE - 1);
- port->xmit_cnt--;
- txcount--;
- }
- }
-
- InterruptTheCard(base);
- if (port->xmit_cnt <= 0)
- port->status &= ~ISI_TXOK;
- if (port->xmit_cnt <= WAKEUP_CHARS)
- tty_wakeup(tty);
- }
-
-put_unlock:
- tty_kref_put(tty);
-unlock:
- spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
- /* schedule another tx for hopefully in about 10ms */
-sched_again:
- mod_timer(&tx, jiffies + msecs_to_jiffies(10));
-}
-
-/*
- * Main interrupt handler routine
- */
-
-static irqreturn_t isicom_interrupt(int irq, void *dev_id)
-{
- struct isi_board *card = dev_id;
- struct isi_port *port;
- struct tty_struct *tty;
- unsigned long base;
- u16 header, word_count, count, channel;
- short byte_count;
- unsigned char *rp;
-
- if (!card || !(card->status & FIRMWARE_LOADED))
- return IRQ_NONE;
-
- base = card->base;
-
- /* did the card interrupt us? */
- if (!(inw(base + 0x0e) & 0x02))
- return IRQ_NONE;
-
- spin_lock(&card->card_lock);
-
- /*
- * disable any interrupts from the PCI card and lower the
- * interrupt line
- */
- outw(0x8000, base+0x04);
- ClearInterrupt(base);
-
- inw(base); /* get the dummy word out */
- header = inw(base);
- channel = (header & 0x7800) >> card->shift_count;
- byte_count = header & 0xff;
-
- if (channel + 1 > card->port_count) {
- pr_warning("%s(0x%lx): %d(channel) > port_count.\n",
- __func__, base, channel+1);
- outw(0x0000, base+0x04); /* enable interrupts */
- spin_unlock(&card->card_lock);
- return IRQ_HANDLED;
- }
- port = card->ports + channel;
- if (!(port->port.flags & ASYNC_INITIALIZED)) {
- outw(0x0000, base+0x04); /* enable interrupts */
- spin_unlock(&card->card_lock);
- return IRQ_HANDLED;
- }
-
- tty = tty_port_tty_get(&port->port);
- if (tty == NULL) {
- word_count = byte_count >> 1;
- while (byte_count > 1) {
- inw(base);
- byte_count -= 2;
- }
- if (byte_count & 0x01)
- inw(base);
- outw(0x0000, base+0x04); /* enable interrupts */
- spin_unlock(&card->card_lock);
- return IRQ_HANDLED;
- }
-
- if (header & 0x8000) { /* Status Packet */
- header = inw(base);
- switch (header & 0xff) {
- case 0: /* Change in EIA signals */
- if (port->port.flags & ASYNC_CHECK_CD) {
- if (port->status & ISI_DCD) {
- if (!(header & ISI_DCD)) {
- /* Carrier has been lost */
- pr_debug("%s: DCD->low.\n",
- __func__);
- port->status &= ~ISI_DCD;
- tty_hangup(tty);
- }
- } else if (header & ISI_DCD) {
- /* Carrier has been detected */
- pr_debug("%s: DCD->high.\n",
- __func__);
- port->status |= ISI_DCD;
- wake_up_interruptible(&port->port.open_wait);
- }
- } else {
- if (header & ISI_DCD)
- port->status |= ISI_DCD;
- else
- port->status &= ~ISI_DCD;
- }
-
- if (port->port.flags & ASYNC_CTS_FLOW) {
- if (tty->hw_stopped) {
- if (header & ISI_CTS) {
- port->port.tty->hw_stopped = 0;
- /* start tx ing */
- port->status |= (ISI_TXOK
- | ISI_CTS);
- tty_wakeup(tty);
- }
- } else if (!(header & ISI_CTS)) {
- tty->hw_stopped = 1;
- /* stop tx ing */
- port->status &= ~(ISI_TXOK | ISI_CTS);
- }
- } else {
- if (header & ISI_CTS)
- port->status |= ISI_CTS;
- else
- port->status &= ~ISI_CTS;
- }
-
- if (header & ISI_DSR)
- port->status |= ISI_DSR;
- else
- port->status &= ~ISI_DSR;
-
- if (header & ISI_RI)
- port->status |= ISI_RI;
- else
- port->status &= ~ISI_RI;
-
- break;
-
- case 1: /* Received Break !!! */
- tty_insert_flip_char(tty, 0, TTY_BREAK);
- if (port->port.flags & ASYNC_SAK)
- do_SAK(tty);
- tty_flip_buffer_push(tty);
- break;
-
- case 2: /* Statistics */
- pr_debug("%s: stats!!!\n", __func__);
- break;
-
- default:
- pr_debug("%s: Unknown code in status packet.\n",
- __func__);
- break;
- }
- } else { /* Data Packet */
-
- count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
- pr_debug("%s: Can rx %d of %d bytes.\n",
- __func__, count, byte_count);
- word_count = count >> 1;
- insw(base, rp, word_count);
- byte_count -= (word_count << 1);
- if (count & 0x0001) {
- tty_insert_flip_char(tty, inw(base) & 0xff,
- TTY_NORMAL);
- byte_count -= 2;
- }
- if (byte_count > 0) {
- pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
- __func__, base, channel + 1);
- /* drain out unread xtra data */
- while (byte_count > 0) {
- inw(base);
- byte_count -= 2;
- }
- }
- tty_flip_buffer_push(tty);
- }
- outw(0x0000, base+0x04); /* enable interrupts */
- spin_unlock(&card->card_lock);
- tty_kref_put(tty);
-
- return IRQ_HANDLED;
-}
-
-static void isicom_config_port(struct tty_struct *tty)
-{
- struct isi_port *port = tty->driver_data;
- struct isi_board *card = port->card;
- unsigned long baud;
- unsigned long base = card->base;
- u16 channel_setup, channel = port->channel,
- shift_count = card->shift_count;
- unsigned char flow_ctrl;
-
- /* FIXME: Switch to new tty baud API */
- baud = C_BAUD(tty);
- if (baud & CBAUDEX) {
- baud &= ~CBAUDEX;
-
- /* if CBAUDEX bit is on and the baud is set to either 50 or 75
- * then the card is programmed for 57.6Kbps or 115Kbps
- * respectively.
- */
-
- /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
- if (baud < 1 || baud > 4)
- tty->termios->c_cflag &= ~CBAUDEX;
- else
- baud += 15;
- }
- if (baud == 15) {
-
- /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
- * by the set_serial_info ioctl ... this is done by
- * the 'setserial' utility.
- */
-
- if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
- baud++; /* 57.6 Kbps */
- if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
- baud += 2; /* 115 Kbps */
- if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
- baud += 3; /* 230 kbps*/
- if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
- baud += 4; /* 460 kbps*/
- }
- if (linuxb_to_isib[baud] == -1) {
- /* hang up */
- drop_dtr(port);
- return;
- } else
- raise_dtr(port);
-
- if (WaitTillCardIsFree(base) == 0) {
- outw(0x8000 | (channel << shift_count) | 0x03, base);
- outw(linuxb_to_isib[baud] << 8 | 0x03, base);
- channel_setup = 0;
- switch (C_CSIZE(tty)) {
- case CS5:
- channel_setup |= ISICOM_CS5;
- break;
- case CS6:
- channel_setup |= ISICOM_CS6;
- break;
- case CS7:
- channel_setup |= ISICOM_CS7;
- break;
- case CS8:
- channel_setup |= ISICOM_CS8;
- break;
- }
-
- if (C_CSTOPB(tty))
- channel_setup |= ISICOM_2SB;
- if (C_PARENB(tty)) {
- channel_setup |= ISICOM_EVPAR;
- if (C_PARODD(tty))
- channel_setup |= ISICOM_ODPAR;
- }
- outw(channel_setup, base);
- InterruptTheCard(base);
- }
- if (C_CLOCAL(tty))
- port->port.flags &= ~ASYNC_CHECK_CD;
- else
- port->port.flags |= ASYNC_CHECK_CD;
-
- /* flow control settings ...*/
- flow_ctrl = 0;
- port->port.flags &= ~ASYNC_CTS_FLOW;
- if (C_CRTSCTS(tty)) {
- port->port.flags |= ASYNC_CTS_FLOW;
- flow_ctrl |= ISICOM_CTSRTS;
- }
- if (I_IXON(tty))
- flow_ctrl |= ISICOM_RESPOND_XONXOFF;
- if (I_IXOFF(tty))
- flow_ctrl |= ISICOM_INITIATE_XONXOFF;
-
- if (WaitTillCardIsFree(base) == 0) {
- outw(0x8000 | (channel << shift_count) | 0x04, base);
- outw(flow_ctrl << 8 | 0x05, base);
- outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
- InterruptTheCard(base);
- }
-
- /* rx enabled -> enable port for rx on the card */
- if (C_CREAD(tty)) {
- card->port_status |= (1 << channel);
- outw(card->port_status, base + 0x02);
- }
-}
-
-/* open et all */
-
-static inline void isicom_setup_board(struct isi_board *bp)
-{
- int channel;
- struct isi_port *port;
-
- bp->count++;
- if (!(bp->status & BOARD_INIT)) {
- port = bp->ports;
- for (channel = 0; channel < bp->port_count; channel++, port++)
- drop_dtr_rts(port);
- }
- bp->status |= BOARD_ACTIVE | BOARD_INIT;
-}
-
-/* Activate and thus setup board are protected from races against shutdown
- by the tty_port mutex */
-
-static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
-{
- struct isi_port *port = container_of(tport, struct isi_port, port);
- struct isi_board *card = port->card;
- unsigned long flags;
-
- if (tty_port_alloc_xmit_buf(tport) < 0)
- return -ENOMEM;
-
- spin_lock_irqsave(&card->card_lock, flags);
- isicom_setup_board(card);
-
- port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
-
- /* discard any residual data */
- if (WaitTillCardIsFree(card->base) == 0) {
- outw(0x8000 | (port->channel << card->shift_count) | 0x02,
- card->base);
- outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
- InterruptTheCard(card->base);
- }
- isicom_config_port(tty);
- spin_unlock_irqrestore(&card->card_lock, flags);
-
- return 0;
-}
-
-static int isicom_carrier_raised(struct tty_port *port)
-{
- struct isi_port *ip = container_of(port, struct isi_port, port);
- return (ip->status & ISI_DCD)?1 : 0;
-}
-
-static struct tty_port *isicom_find_port(struct tty_struct *tty)
-{
- struct isi_port *port;
- struct isi_board *card;
- unsigned int board;
- int line = tty->index;
-
- if (line < 0 || line > PORT_COUNT-1)
- return NULL;
- board = BOARD(line);
- card = &isi_card[board];
-
- if (!(card->status & FIRMWARE_LOADED))
- return NULL;
-
- /* open on a port greater than the port count for the card !!! */
- if (line > ((board * 16) + card->port_count - 1))
- return NULL;
-
- port = &isi_ports[line];
- if (isicom_paranoia_check(port, tty->name, "isicom_open"))
- return NULL;
-
- return &port->port;
-}
-
-static int isicom_open(struct tty_struct *tty, struct file *filp)
-{
- struct isi_port *port;
- struct tty_port *tport;
-
- tport = isicom_find_port(tty);
- if (tport == NULL)
- return -ENODEV;
- port = container_of(tport, struct isi_port, port);
-
- tty->driver_data = port;
- return tty_port_open(tport, tty, filp);
-}
-
-/* close et all */
-
-/* card->lock HAS to be held */
-static void isicom_shutdown_port(struct isi_port *port)
-{
- struct isi_board *card = port->card;
-
- if (--card->count < 0) {
- pr_debug("%s: bad board(0x%lx) count %d.\n",
- __func__, card->base, card->count);
- card->count = 0;
- }
- /* last port was closed, shutdown that board too */
- if (!card->count)
- card->status &= BOARD_ACTIVE;
-}
-
-static void isicom_flush_buffer(struct tty_struct *tty)
-{
- struct isi_port *port = tty->driver_data;
- struct isi_board *card = port->card;
- unsigned long flags;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
- return;
-
- spin_lock_irqsave(&card->card_lock, flags);
- port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
- spin_unlock_irqrestore(&card->card_lock, flags);
-
- tty_wakeup(tty);
-}
-
-static void isicom_shutdown(struct tty_port *port)
-{
- struct isi_port *ip = container_of(port, struct isi_port, port);
- struct isi_board *card = ip->card;
- unsigned long flags;
-
- /* indicate to the card that no more data can be received
- on this port */
- spin_lock_irqsave(&card->card_lock, flags);
- card->port_status &= ~(1 << ip->channel);
- outw(card->port_status, card->base + 0x02);
- isicom_shutdown_port(ip);
- spin_unlock_irqrestore(&card->card_lock, flags);
- tty_port_free_xmit_buf(port);
-}
-
-static void isicom_close(struct tty_struct *tty, struct file *filp)
-{
- struct isi_port *ip = tty->driver_data;
- struct tty_port *port;
-
- if (ip == NULL)
- return;
-
- port = &ip->port;
- if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
- return;
- tty_port_close(port, tty, filp);
-}
-
-/* write et all */
-static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
- int count)
-{
- struct isi_port *port = tty->driver_data;
- struct isi_board *card = port->card;
- unsigned long flags;
- int cnt, total = 0;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_write"))
- return 0;
-
- spin_lock_irqsave(&card->card_lock, flags);
-
- while (1) {
- cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
- - 1, SERIAL_XMIT_SIZE - port->xmit_head));
- if (cnt <= 0)
- break;
-
- memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
- port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
- - 1);
- port->xmit_cnt += cnt;
- buf += cnt;
- count -= cnt;
- total += cnt;
- }
- if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
- port->status |= ISI_TXOK;
- spin_unlock_irqrestore(&card->card_lock, flags);
- return total;
-}
-
-/* put_char et all */
-static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
-{
- struct isi_port *port = tty->driver_data;
- struct isi_board *card = port->card;
- unsigned long flags;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
- return 0;
-
- spin_lock_irqsave(&card->card_lock, flags);
- if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
- spin_unlock_irqrestore(&card->card_lock, flags);
- return 0;
- }
-
- port->port.xmit_buf[port->xmit_head++] = ch;
- port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
- port->xmit_cnt++;
- spin_unlock_irqrestore(&card->card_lock, flags);
- return 1;
-}
-
-/* flush_chars et all */
-static void isicom_flush_chars(struct tty_struct *tty)
-{
- struct isi_port *port = tty->driver_data;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
- return;
-
- if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
- !port->port.xmit_buf)
- return;
-
- /* this tells the transmitter to consider this port for
- data output to the card ... that's the best we can do. */
- port->status |= ISI_TXOK;
-}
-
-/* write_room et all */
-static int isicom_write_room(struct tty_struct *tty)
-{
- struct isi_port *port = tty->driver_data;
- int free;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
- return 0;
-
- free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
- if (free < 0)
- free = 0;
- return free;
-}
-
-/* chars_in_buffer et all */
-static int isicom_chars_in_buffer(struct tty_struct *tty)
-{
- struct isi_port *port = tty->driver_data;
- if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
- return 0;
- return port->xmit_cnt;
-}
-
-/* ioctl et all */
-static int isicom_send_break(struct tty_struct *tty, int length)
-{
- struct isi_port *port = tty->driver_data;
- struct isi_board *card = port->card;
- unsigned long base = card->base;
-
- if (length == -1)
- return -EOPNOTSUPP;
-
- if (!lock_card(card))
- return -EINVAL;
-
- outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
- outw((length & 0xff) << 8 | 0x00, base);
- outw((length & 0xff00), base);
- InterruptTheCard(base);
-
- unlock_card(card);
- return 0;
-}
-
-static int isicom_tiocmget(struct tty_struct *tty)
-{
- struct isi_port *port = tty->driver_data;
- /* just send the port status */
- u16 status = port->status;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
- return -ENODEV;
-
- return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
- ((status & ISI_DTR) ? TIOCM_DTR : 0) |
- ((status & ISI_DCD) ? TIOCM_CAR : 0) |
- ((status & ISI_DSR) ? TIOCM_DSR : 0) |
- ((status & ISI_CTS) ? TIOCM_CTS : 0) |
- ((status & ISI_RI ) ? TIOCM_RI : 0);
-}
-
-static int isicom_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- struct isi_port *port = tty->driver_data;
- unsigned long flags;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
- return -ENODEV;
-
- spin_lock_irqsave(&port->card->card_lock, flags);
- if (set & TIOCM_RTS)
- raise_rts(port);
- if (set & TIOCM_DTR)
- raise_dtr(port);
-
- if (clear & TIOCM_RTS)
- drop_rts(port);
- if (clear & TIOCM_DTR)
- drop_dtr(port);
- spin_unlock_irqrestore(&port->card->card_lock, flags);
-
- return 0;
-}
-
-static int isicom_set_serial_info(struct tty_struct *tty,
- struct serial_struct __user *info)
-{
- struct isi_port *port = tty->driver_data;
- struct serial_struct newinfo;
- int reconfig_port;
-
- if (copy_from_user(&newinfo, info, sizeof(newinfo)))
- return -EFAULT;
-
- mutex_lock(&port->port.mutex);
- reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
- (newinfo.flags & ASYNC_SPD_MASK));
-
- if (!capable(CAP_SYS_ADMIN)) {
- if ((newinfo.close_delay != port->port.close_delay) ||
- (newinfo.closing_wait != port->port.closing_wait) ||
- ((newinfo.flags & ~ASYNC_USR_MASK) !=
- (port->port.flags & ~ASYNC_USR_MASK))) {
- mutex_unlock(&port->port.mutex);
- return -EPERM;
- }
- port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
- (newinfo.flags & ASYNC_USR_MASK));
- } else {
- port->port.close_delay = newinfo.close_delay;
- port->port.closing_wait = newinfo.closing_wait;
- port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
- (newinfo.flags & ASYNC_FLAGS));
- }
- if (reconfig_port) {
- unsigned long flags;
- spin_lock_irqsave(&port->card->card_lock, flags);
- isicom_config_port(tty);
- spin_unlock_irqrestore(&port->card->card_lock, flags);
- }
- mutex_unlock(&port->port.mutex);
- return 0;
-}
-
-static int isicom_get_serial_info(struct isi_port *port,
- struct serial_struct __user *info)
-{
- struct serial_struct out_info;
-
- mutex_lock(&port->port.mutex);
- memset(&out_info, 0, sizeof(out_info));
-/* out_info.type = ? */
- out_info.line = port - isi_ports;
- out_info.port = port->card->base;
- out_info.irq = port->card->irq;
- out_info.flags = port->port.flags;
-/* out_info.baud_base = ? */
- out_info.close_delay = port->port.close_delay;
- out_info.closing_wait = port->port.closing_wait;
- mutex_unlock(&port->port.mutex);
- if (copy_to_user(info, &out_info, sizeof(out_info)))
- return -EFAULT;
- return 0;
-}
-
-static int isicom_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct isi_port *port = tty->driver_data;
- void __user *argp = (void __user *)arg;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
- return -ENODEV;
-
- switch (cmd) {
- case TIOCGSERIAL:
- return isicom_get_serial_info(port, argp);
-
- case TIOCSSERIAL:
- return isicom_set_serial_info(tty, argp);
-
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
-/* set_termios et all */
-static void isicom_set_termios(struct tty_struct *tty,
- struct ktermios *old_termios)
-{
- struct isi_port *port = tty->driver_data;
- unsigned long flags;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
- return;
-
- if (tty->termios->c_cflag == old_termios->c_cflag &&
- tty->termios->c_iflag == old_termios->c_iflag)
- return;
-
- spin_lock_irqsave(&port->card->card_lock, flags);
- isicom_config_port(tty);
- spin_unlock_irqrestore(&port->card->card_lock, flags);
-
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- isicom_start(tty);
- }
-}
-
-/* throttle et all */
-static void isicom_throttle(struct tty_struct *tty)
-{
- struct isi_port *port = tty->driver_data;
- struct isi_board *card = port->card;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
- return;
-
- /* tell the card that this port cannot handle any more data for now */
- card->port_status &= ~(1 << port->channel);
- outw(card->port_status, card->base + 0x02);
-}
-
-/* unthrottle et all */
-static void isicom_unthrottle(struct tty_struct *tty)
-{
- struct isi_port *port = tty->driver_data;
- struct isi_board *card = port->card;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
- return;
-
- /* tell the card that this port is ready to accept more data */
- card->port_status |= (1 << port->channel);
- outw(card->port_status, card->base + 0x02);
-}
-
-/* stop et all */
-static void isicom_stop(struct tty_struct *tty)
-{
- struct isi_port *port = tty->driver_data;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
- return;
-
- /* this tells the transmitter not to consider this port for
- data output to the card. */
- port->status &= ~ISI_TXOK;
-}
-
-/* start et all */
-static void isicom_start(struct tty_struct *tty)
-{
- struct isi_port *port = tty->driver_data;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_start"))
- return;
-
- /* this tells the transmitter to consider this port for
- data output to the card. */
- port->status |= ISI_TXOK;
-}
-
-static void isicom_hangup(struct tty_struct *tty)
-{
- struct isi_port *port = tty->driver_data;
-
- if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
- return;
- tty_port_hangup(&port->port);
-}
-
-
-/*
- * Driver init and deinit functions
- */
-
-static const struct tty_operations isicom_ops = {
- .open = isicom_open,
- .close = isicom_close,
- .write = isicom_write,
- .put_char = isicom_put_char,
- .flush_chars = isicom_flush_chars,
- .write_room = isicom_write_room,
- .chars_in_buffer = isicom_chars_in_buffer,
- .ioctl = isicom_ioctl,
- .set_termios = isicom_set_termios,
- .throttle = isicom_throttle,
- .unthrottle = isicom_unthrottle,
- .stop = isicom_stop,
- .start = isicom_start,
- .hangup = isicom_hangup,
- .flush_buffer = isicom_flush_buffer,
- .tiocmget = isicom_tiocmget,
- .tiocmset = isicom_tiocmset,
- .break_ctl = isicom_send_break,
-};
-
-static const struct tty_port_operations isicom_port_ops = {
- .carrier_raised = isicom_carrier_raised,
- .dtr_rts = isicom_dtr_rts,
- .activate = isicom_activate,
- .shutdown = isicom_shutdown,
-};
-
-static int __devinit reset_card(struct pci_dev *pdev,
- const unsigned int card, unsigned int *signature)
-{
- struct isi_board *board = pci_get_drvdata(pdev);
- unsigned long base = board->base;
- unsigned int sig, portcount = 0;
- int retval = 0;
-
- dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
- base);
-
- inw(base + 0x8);
-
- msleep(10);
-
- outw(0, base + 0x8); /* Reset */
-
- msleep(1000);
-
- sig = inw(base + 0x4) & 0xff;
-
- if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
- sig != 0xee) {
- dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
- "bad I/O Port Address 0x%lx).\n", card + 1, base);
- dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
- retval = -EIO;
- goto end;
- }
-
- msleep(10);
-
- portcount = inw(base + 0x2);
- if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
- portcount != 8 && portcount != 16)) {
- dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
- card + 1);
- retval = -EIO;
- goto end;
- }
-
- switch (sig) {
- case 0xa5:
- case 0xbb:
- case 0xdd:
- board->port_count = (portcount == 4) ? 4 : 8;
- board->shift_count = 12;
- break;
- case 0xcc:
- case 0xee:
- board->port_count = 16;
- board->shift_count = 11;
- break;
- }
- dev_info(&pdev->dev, "-Done\n");
- *signature = sig;
-
-end:
- return retval;
-}
-
-static int __devinit load_firmware(struct pci_dev *pdev,
- const unsigned int index, const unsigned int signature)
-{
- struct isi_board *board = pci_get_drvdata(pdev);
- const struct firmware *fw;
- unsigned long base = board->base;
- unsigned int a;
- u16 word_count, status;
- int retval = -EIO;
- char *name;
- u8 *data;
-
- struct stframe {
- u16 addr;
- u16 count;
- u8 data[0];
- } *frame;
-
- switch (signature) {
- case 0xa5:
- name = "isi608.bin";
- break;
- case 0xbb:
- name = "isi608em.bin";
- break;
- case 0xcc:
- name = "isi616em.bin";
- break;
- case 0xdd:
- name = "isi4608.bin";
- break;
- case 0xee:
- name = "isi4616.bin";
- break;
- default:
- dev_err(&pdev->dev, "Unknown signature.\n");
- goto end;
- }
-
- retval = request_firmware(&fw, name, &pdev->dev);
- if (retval)
- goto end;
-
- retval = -EIO;
-
- for (frame = (struct stframe *)fw->data;
- frame < (struct stframe *)(fw->data + fw->size);
- frame = (struct stframe *)((u8 *)(frame + 1) +
- frame->count)) {
- if (WaitTillCardIsFree(base))
- goto errrelfw;
-
- outw(0xf0, base); /* start upload sequence */
- outw(0x00, base);
- outw(frame->addr, base); /* lsb of address */
-
- word_count = frame->count / 2 + frame->count % 2;
- outw(word_count, base);
- InterruptTheCard(base);
-
- udelay(100); /* 0x2f */
-
- if (WaitTillCardIsFree(base))
- goto errrelfw;
-
- status = inw(base + 0x4);
- if (status != 0) {
- dev_warn(&pdev->dev, "Card%d rejected load header:\n"
- "Address:0x%x\n"
- "Count:0x%x\n"
- "Status:0x%x\n",
- index + 1, frame->addr, frame->count, status);
- goto errrelfw;
- }
- outsw(base, frame->data, word_count);
-
- InterruptTheCard(base);
-
- udelay(50); /* 0x0f */
-
- if (WaitTillCardIsFree(base))
- goto errrelfw;
-
- status = inw(base + 0x4);
- if (status != 0) {
- dev_err(&pdev->dev, "Card%d got out of sync.Card "
- "Status:0x%x\n", index + 1, status);
- goto errrelfw;
- }
- }
-
-/* XXX: should we test it by reading it back and comparing with original like
- * in load firmware package? */
- for (frame = (struct stframe *)fw->data;
- frame < (struct stframe *)(fw->data + fw->size);
- frame = (struct stframe *)((u8 *)(frame + 1) +
- frame->count)) {
- if (WaitTillCardIsFree(base))
- goto errrelfw;
-
- outw(0xf1, base); /* start download sequence */
- outw(0x00, base);
- outw(frame->addr, base); /* lsb of address */
-
- word_count = (frame->count >> 1) + frame->count % 2;
- outw(word_count + 1, base);
- InterruptTheCard(base);
-
- udelay(50); /* 0xf */
-
- if (WaitTillCardIsFree(base))
- goto errrelfw;
-
- status = inw(base + 0x4);
- if (status != 0) {
- dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
- "Address:0x%x\n"
- "Count:0x%x\n"
- "Status: 0x%x\n",
- index + 1, frame->addr, frame->count, status);
- goto errrelfw;
- }
-
- data = kmalloc(word_count * 2, GFP_KERNEL);
- if (data == NULL) {
- dev_err(&pdev->dev, "Card%d, firmware upload "
- "failed, not enough memory\n", index + 1);
- goto errrelfw;
- }
- inw(base);
- insw(base, data, word_count);
- InterruptTheCard(base);
-
- for (a = 0; a < frame->count; a++)
- if (data[a] != frame->data[a]) {
- kfree(data);
- dev_err(&pdev->dev, "Card%d, firmware upload "
- "failed\n", index + 1);
- goto errrelfw;
- }
- kfree(data);
-
- udelay(50); /* 0xf */
-
- if (WaitTillCardIsFree(base))
- goto errrelfw;
-
- status = inw(base + 0x4);
- if (status != 0) {
- dev_err(&pdev->dev, "Card%d verify got out of sync. "
- "Card Status:0x%x\n", index + 1, status);
- goto errrelfw;
- }
- }
-
- /* xfer ctrl */
- if (WaitTillCardIsFree(base))
- goto errrelfw;
-
- outw(0xf2, base);
- outw(0x800, base);
- outw(0x0, base);
- outw(0x0, base);
- InterruptTheCard(base);
- outw(0x0, base + 0x4); /* for ISI4608 cards */
-
- board->status |= FIRMWARE_LOADED;
- retval = 0;
-
-errrelfw:
- release_firmware(fw);
-end:
- return retval;
-}
-
-/*
- * Insmod can set static symbols so keep these static
- */
-static unsigned int card_count;
-
-static int __devinit isicom_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
- unsigned int uninitialized_var(signature), index;
- int retval = -EPERM;
- struct isi_board *board = NULL;
-
- if (card_count >= BOARD_COUNT)
- goto err;
-
- retval = pci_enable_device(pdev);
- if (retval) {
- dev_err(&pdev->dev, "failed to enable\n");
- goto err;
- }
-
- dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
-
- /* allot the first empty slot in the array */
- for (index = 0; index < BOARD_COUNT; index++) {
- if (isi_card[index].base == 0) {
- board = &isi_card[index];
- break;
- }
- }
- if (index == BOARD_COUNT) {
- retval = -ENODEV;
- goto err_disable;
- }
-
- board->index = index;
- board->base = pci_resource_start(pdev, 3);
- board->irq = pdev->irq;
- card_count++;
-
- pci_set_drvdata(pdev, board);
-
- retval = pci_request_region(pdev, 3, ISICOM_NAME);
- if (retval) {
- dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
- "will be disabled.\n", board->base, board->base + 15,
- index + 1);
- retval = -EBUSY;
- goto errdec;
- }
-
- retval = request_irq(board->irq, isicom_interrupt,
- IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
- if (retval < 0) {
- dev_err(&pdev->dev, "Could not install handler at Irq %d. "
- "Card%d will be disabled.\n", board->irq, index + 1);
- goto errunrr;
- }
-
- retval = reset_card(pdev, index, &signature);
- if (retval < 0)
- goto errunri;
-
- retval = load_firmware(pdev, index, signature);
- if (retval < 0)
- goto errunri;
-
- for (index = 0; index < board->port_count; index++)
- tty_register_device(isicom_normal, board->index * 16 + index,
- &pdev->dev);
-
- return 0;
-
-errunri:
- free_irq(board->irq, board);
-errunrr:
- pci_release_region(pdev, 3);
-errdec:
- board->base = 0;
- card_count--;
-err_disable:
- pci_disable_device(pdev);
-err:
- return retval;
-}
-
-static void __devexit isicom_remove(struct pci_dev *pdev)
-{
- struct isi_board *board = pci_get_drvdata(pdev);
- unsigned int i;
-
- for (i = 0; i < board->port_count; i++)
- tty_unregister_device(isicom_normal, board->index * 16 + i);
-
- free_irq(board->irq, board);
- pci_release_region(pdev, 3);
- board->base = 0;
- card_count--;
- pci_disable_device(pdev);
-}
-
-static int __init isicom_init(void)
-{
- int retval, idx, channel;
- struct isi_port *port;
-
- for (idx = 0; idx < BOARD_COUNT; idx++) {
- port = &isi_ports[idx * 16];
- isi_card[idx].ports = port;
- spin_lock_init(&isi_card[idx].card_lock);
- for (channel = 0; channel < 16; channel++, port++) {
- tty_port_init(&port->port);
- port->port.ops = &isicom_port_ops;
- port->magic = ISICOM_MAGIC;
- port->card = &isi_card[idx];
- port->channel = channel;
- port->port.close_delay = 50 * HZ/100;
- port->port.closing_wait = 3000 * HZ/100;
- port->status = 0;
- /* . . . */
- }
- isi_card[idx].base = 0;
- isi_card[idx].irq = 0;
- }
-
- /* tty driver structure initialization */
- isicom_normal = alloc_tty_driver(PORT_COUNT);
- if (!isicom_normal) {
- retval = -ENOMEM;
- goto error;
- }
-
- isicom_normal->owner = THIS_MODULE;
- isicom_normal->name = "ttyM";
- isicom_normal->major = ISICOM_NMAJOR;
- isicom_normal->minor_start = 0;
- isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
- isicom_normal->subtype = SERIAL_TYPE_NORMAL;
- isicom_normal->init_termios = tty_std_termios;
- isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
- CLOCAL;
- isicom_normal->flags = TTY_DRIVER_REAL_RAW |
- TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
- tty_set_operations(isicom_normal, &isicom_ops);
-
- retval = tty_register_driver(isicom_normal);
- if (retval) {
- pr_debug("Couldn't register the dialin driver\n");
- goto err_puttty;
- }
-
- retval = pci_register_driver(&isicom_driver);
- if (retval < 0) {
- pr_err("Unable to register pci driver.\n");
- goto err_unrtty;
- }
-
- mod_timer(&tx, jiffies + 1);
-
- return 0;
-err_unrtty:
- tty_unregister_driver(isicom_normal);
-err_puttty:
- put_tty_driver(isicom_normal);
-error:
- return retval;
-}
-
-static void __exit isicom_exit(void)
-{
- del_timer_sync(&tx);
-
- pci_unregister_driver(&isicom_driver);
- tty_unregister_driver(isicom_normal);
- put_tty_driver(isicom_normal);
-}
-
-module_init(isicom_init);
-module_exit(isicom_exit);
-
-MODULE_AUTHOR("MultiTech");
-MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
-MODULE_LICENSE("GPL");
-MODULE_FIRMWARE("isi608.bin");
-MODULE_FIRMWARE("isi608em.bin");
-MODULE_FIRMWARE("isi616em.bin");
-MODULE_FIRMWARE("isi4608.bin");
-MODULE_FIRMWARE("isi4616.bin");
+++ /dev/null
-/*****************************************************************************/
-/*
- * moxa.c -- MOXA Intellio family multiport serial driver.
- *
- * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
- * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
- *
- * This code is loosely based on the Linux serial driver, written by
- * Linus Torvalds, Theodore T'so and others.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/*
- * MOXA Intellio Series Driver
- * for : LINUX
- * date : 1999/1/7
- * version : 5.1
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/errno.h>
-#include <linux/firmware.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/serial.h>
-#include <linux/tty_driver.h>
-#include <linux/delay.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-#include <linux/slab.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-#include "moxa.h"
-
-#define MOXA_VERSION "6.0k"
-
-#define MOXA_FW_HDRLEN 32
-
-#define MOXAMAJOR 172
-
-#define MAX_BOARDS 4 /* Don't change this value */
-#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
-#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
-
-#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
- (brd)->boardType == MOXA_BOARD_C320_PCI)
-
-/*
- * Define the Moxa PCI vendor and device IDs.
- */
-#define MOXA_BUS_TYPE_ISA 0
-#define MOXA_BUS_TYPE_PCI 1
-
-enum {
- MOXA_BOARD_C218_PCI = 1,
- MOXA_BOARD_C218_ISA,
- MOXA_BOARD_C320_PCI,
- MOXA_BOARD_C320_ISA,
- MOXA_BOARD_CP204J,
-};
-
-static char *moxa_brdname[] =
-{
- "C218 Turbo PCI series",
- "C218 Turbo ISA series",
- "C320 Turbo PCI series",
- "C320 Turbo ISA series",
- "CP-204J series",
-};
-
-#ifdef CONFIG_PCI
-static struct pci_device_id moxa_pcibrds[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
- .driver_data = MOXA_BOARD_C218_PCI },
- { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
- .driver_data = MOXA_BOARD_C320_PCI },
- { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
- .driver_data = MOXA_BOARD_CP204J },
- { 0 }
-};
-MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
-#endif /* CONFIG_PCI */
-
-struct moxa_port;
-
-static struct moxa_board_conf {
- int boardType;
- int numPorts;
- int busType;
-
- unsigned int ready;
-
- struct moxa_port *ports;
-
- void __iomem *basemem;
- void __iomem *intNdx;
- void __iomem *intPend;
- void __iomem *intTable;
-} moxa_boards[MAX_BOARDS];
-
-struct mxser_mstatus {
- tcflag_t cflag;
- int cts;
- int dsr;
- int ri;
- int dcd;
-};
-
-struct moxaq_str {
- int inq;
- int outq;
-};
-
-struct moxa_port {
- struct tty_port port;
- struct moxa_board_conf *board;
- void __iomem *tableAddr;
-
- int type;
- int cflag;
- unsigned long statusflags;
-
- u8 DCDState; /* Protected by the port lock */
- u8 lineCtrl;
- u8 lowChkFlag;
-};
-
-struct mon_str {
- int tick;
- int rxcnt[MAX_PORTS];
- int txcnt[MAX_PORTS];
-};
-
-/* statusflags */
-#define TXSTOPPED 1
-#define LOWWAIT 2
-#define EMPTYWAIT 3
-
-#define SERIAL_DO_RESTART
-
-#define WAKEUP_CHARS 256
-
-static int ttymajor = MOXAMAJOR;
-static struct mon_str moxaLog;
-static unsigned int moxaFuncTout = HZ / 2;
-static unsigned int moxaLowWaterChk;
-static DEFINE_MUTEX(moxa_openlock);
-static DEFINE_SPINLOCK(moxa_lock);
-
-static unsigned long baseaddr[MAX_BOARDS];
-static unsigned int type[MAX_BOARDS];
-static unsigned int numports[MAX_BOARDS];
-
-MODULE_AUTHOR("William Chen");
-MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
-MODULE_LICENSE("GPL");
-MODULE_FIRMWARE("c218tunx.cod");
-MODULE_FIRMWARE("cp204unx.cod");
-MODULE_FIRMWARE("c320tunx.cod");
-
-module_param_array(type, uint, NULL, 0);
-MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
-module_param_array(baseaddr, ulong, NULL, 0);
-MODULE_PARM_DESC(baseaddr, "base address");
-module_param_array(numports, uint, NULL, 0);
-MODULE_PARM_DESC(numports, "numports (ignored for C218)");
-
-module_param(ttymajor, int, 0);
-
-/*
- * static functions:
- */
-static int moxa_open(struct tty_struct *, struct file *);
-static void moxa_close(struct tty_struct *, struct file *);
-static int moxa_write(struct tty_struct *, const unsigned char *, int);
-static int moxa_write_room(struct tty_struct *);
-static void moxa_flush_buffer(struct tty_struct *);
-static int moxa_chars_in_buffer(struct tty_struct *);
-static void moxa_set_termios(struct tty_struct *, struct ktermios *);
-static void moxa_stop(struct tty_struct *);
-static void moxa_start(struct tty_struct *);
-static void moxa_hangup(struct tty_struct *);
-static int moxa_tiocmget(struct tty_struct *tty);
-static int moxa_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear);
-static void moxa_poll(unsigned long);
-static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
-static void moxa_shutdown(struct tty_port *);
-static int moxa_carrier_raised(struct tty_port *);
-static void moxa_dtr_rts(struct tty_port *, int);
-/*
- * moxa board interface functions:
- */
-static void MoxaPortEnable(struct moxa_port *);
-static void MoxaPortDisable(struct moxa_port *);
-static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
-static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
-static void MoxaPortLineCtrl(struct moxa_port *, int, int);
-static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
-static int MoxaPortLineStatus(struct moxa_port *);
-static void MoxaPortFlushData(struct moxa_port *, int);
-static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
-static int MoxaPortReadData(struct moxa_port *);
-static int MoxaPortTxQueue(struct moxa_port *);
-static int MoxaPortRxQueue(struct moxa_port *);
-static int MoxaPortTxFree(struct moxa_port *);
-static void MoxaPortTxDisable(struct moxa_port *);
-static void MoxaPortTxEnable(struct moxa_port *);
-static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
-static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
-static void MoxaSetFifo(struct moxa_port *port, int enable);
-
-/*
- * I/O functions
- */
-
-static DEFINE_SPINLOCK(moxafunc_lock);
-
-static void moxa_wait_finish(void __iomem *ofsAddr)
-{
- unsigned long end = jiffies + moxaFuncTout;
-
- while (readw(ofsAddr + FuncCode) != 0)
- if (time_after(jiffies, end))
- return;
- if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
- printk(KERN_WARNING "moxa function expired\n");
-}
-
-static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
-{
- unsigned long flags;
- spin_lock_irqsave(&moxafunc_lock, flags);
- writew(arg, ofsAddr + FuncArg);
- writew(cmd, ofsAddr + FuncCode);
- moxa_wait_finish(ofsAddr);
- spin_unlock_irqrestore(&moxafunc_lock, flags);
-}
-
-static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
-{
- unsigned long flags;
- u16 ret;
- spin_lock_irqsave(&moxafunc_lock, flags);
- writew(arg, ofsAddr + FuncArg);
- writew(cmd, ofsAddr + FuncCode);
- moxa_wait_finish(ofsAddr);
- ret = readw(ofsAddr + FuncArg);
- spin_unlock_irqrestore(&moxafunc_lock, flags);
- return ret;
-}
-
-static void moxa_low_water_check(void __iomem *ofsAddr)
-{
- u16 rptr, wptr, mask, len;
-
- if (readb(ofsAddr + FlagStat) & Xoff_state) {
- rptr = readw(ofsAddr + RXrptr);
- wptr = readw(ofsAddr + RXwptr);
- mask = readw(ofsAddr + RX_mask);
- len = (wptr - rptr) & mask;
- if (len <= Low_water)
- moxafunc(ofsAddr, FC_SendXon, 0);
- }
-}
-
-/*
- * TTY operations
- */
-
-static int moxa_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct moxa_port *ch = tty->driver_data;
- void __user *argp = (void __user *)arg;
- int status, ret = 0;
-
- if (tty->index == MAX_PORTS) {
- if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
- cmd != MOXA_GETMSTATUS)
- return -EINVAL;
- } else if (!ch)
- return -ENODEV;
-
- switch (cmd) {
- case MOXA_GETDATACOUNT:
- moxaLog.tick = jiffies;
- if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
- ret = -EFAULT;
- break;
- case MOXA_FLUSH_QUEUE:
- MoxaPortFlushData(ch, arg);
- break;
- case MOXA_GET_IOQUEUE: {
- struct moxaq_str __user *argm = argp;
- struct moxaq_str tmp;
- struct moxa_port *p;
- unsigned int i, j;
-
- for (i = 0; i < MAX_BOARDS; i++) {
- p = moxa_boards[i].ports;
- for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
- memset(&tmp, 0, sizeof(tmp));
- spin_lock_bh(&moxa_lock);
- if (moxa_boards[i].ready) {
- tmp.inq = MoxaPortRxQueue(p);
- tmp.outq = MoxaPortTxQueue(p);
- }
- spin_unlock_bh(&moxa_lock);
- if (copy_to_user(argm, &tmp, sizeof(tmp)))
- return -EFAULT;
- }
- }
- break;
- } case MOXA_GET_OQUEUE:
- status = MoxaPortTxQueue(ch);
- ret = put_user(status, (unsigned long __user *)argp);
- break;
- case MOXA_GET_IQUEUE:
- status = MoxaPortRxQueue(ch);
- ret = put_user(status, (unsigned long __user *)argp);
- break;
- case MOXA_GETMSTATUS: {
- struct mxser_mstatus __user *argm = argp;
- struct mxser_mstatus tmp;
- struct moxa_port *p;
- unsigned int i, j;
-
- for (i = 0; i < MAX_BOARDS; i++) {
- p = moxa_boards[i].ports;
- for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
- struct tty_struct *ttyp;
- memset(&tmp, 0, sizeof(tmp));
- spin_lock_bh(&moxa_lock);
- if (!moxa_boards[i].ready) {
- spin_unlock_bh(&moxa_lock);
- goto copy;
- }
-
- status = MoxaPortLineStatus(p);
- spin_unlock_bh(&moxa_lock);
-
- if (status & 1)
- tmp.cts = 1;
- if (status & 2)
- tmp.dsr = 1;
- if (status & 4)
- tmp.dcd = 1;
-
- ttyp = tty_port_tty_get(&p->port);
- if (!ttyp || !ttyp->termios)
- tmp.cflag = p->cflag;
- else
- tmp.cflag = ttyp->termios->c_cflag;
- tty_kref_put(tty);
-copy:
- if (copy_to_user(argm, &tmp, sizeof(tmp)))
- return -EFAULT;
- }
- }
- break;
- }
- case TIOCGSERIAL:
- mutex_lock(&ch->port.mutex);
- ret = moxa_get_serial_info(ch, argp);
- mutex_unlock(&ch->port.mutex);
- break;
- case TIOCSSERIAL:
- mutex_lock(&ch->port.mutex);
- ret = moxa_set_serial_info(ch, argp);
- mutex_unlock(&ch->port.mutex);
- break;
- default:
- ret = -ENOIOCTLCMD;
- }
- return ret;
-}
-
-static int moxa_break_ctl(struct tty_struct *tty, int state)
-{
- struct moxa_port *port = tty->driver_data;
-
- moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
- Magic_code);
- return 0;
-}
-
-static const struct tty_operations moxa_ops = {
- .open = moxa_open,
- .close = moxa_close,
- .write = moxa_write,
- .write_room = moxa_write_room,
- .flush_buffer = moxa_flush_buffer,
- .chars_in_buffer = moxa_chars_in_buffer,
- .ioctl = moxa_ioctl,
- .set_termios = moxa_set_termios,
- .stop = moxa_stop,
- .start = moxa_start,
- .hangup = moxa_hangup,
- .break_ctl = moxa_break_ctl,
- .tiocmget = moxa_tiocmget,
- .tiocmset = moxa_tiocmset,
-};
-
-static const struct tty_port_operations moxa_port_ops = {
- .carrier_raised = moxa_carrier_raised,
- .dtr_rts = moxa_dtr_rts,
- .shutdown = moxa_shutdown,
-};
-
-static struct tty_driver *moxaDriver;
-static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
-
-/*
- * HW init
- */
-
-static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
-{
- switch (brd->boardType) {
- case MOXA_BOARD_C218_ISA:
- case MOXA_BOARD_C218_PCI:
- if (model != 1)
- goto err;
- break;
- case MOXA_BOARD_CP204J:
- if (model != 3)
- goto err;
- break;
- default:
- if (model != 2)
- goto err;
- break;
- }
- return 0;
-err:
- return -EINVAL;
-}
-
-static int moxa_check_fw(const void *ptr)
-{
- const __le16 *lptr = ptr;
-
- if (*lptr != cpu_to_le16(0x7980))
- return -EINVAL;
-
- return 0;
-}
-
-static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
- size_t len)
-{
- void __iomem *baseAddr = brd->basemem;
- u16 tmp;
-
- writeb(HW_reset, baseAddr + Control_reg); /* reset */
- msleep(10);
- memset_io(baseAddr, 0, 4096);
- memcpy_toio(baseAddr, buf, len); /* download BIOS */
- writeb(0, baseAddr + Control_reg); /* restart */
-
- msleep(2000);
-
- switch (brd->boardType) {
- case MOXA_BOARD_C218_ISA:
- case MOXA_BOARD_C218_PCI:
- tmp = readw(baseAddr + C218_key);
- if (tmp != C218_KeyCode)
- goto err;
- break;
- case MOXA_BOARD_CP204J:
- tmp = readw(baseAddr + C218_key);
- if (tmp != CP204J_KeyCode)
- goto err;
- break;
- default:
- tmp = readw(baseAddr + C320_key);
- if (tmp != C320_KeyCode)
- goto err;
- tmp = readw(baseAddr + C320_status);
- if (tmp != STS_init) {
- printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
- "module not found\n");
- return -EIO;
- }
- break;
- }
-
- return 0;
-err:
- printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
- return -EIO;
-}
-
-static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
- size_t len)
-{
- void __iomem *baseAddr = brd->basemem;
-
- if (len < 7168) {
- printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
- return -EINVAL;
- }
-
- writew(len - 7168 - 2, baseAddr + C320bapi_len);
- writeb(1, baseAddr + Control_reg); /* Select Page 1 */
- memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
- writeb(2, baseAddr + Control_reg); /* Select Page 2 */
- memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
-
- return 0;
-}
-
-static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
- size_t len)
-{
- void __iomem *baseAddr = brd->basemem;
- const __le16 *uptr = ptr;
- size_t wlen, len2, j;
- unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
- unsigned int i, retry;
- u16 usum, keycode;
-
- keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
- C218_KeyCode;
-
- switch (brd->boardType) {
- case MOXA_BOARD_CP204J:
- case MOXA_BOARD_C218_ISA:
- case MOXA_BOARD_C218_PCI:
- key = C218_key;
- loadbuf = C218_LoadBuf;
- loadlen = C218DLoad_len;
- checksum = C218check_sum;
- checksum_ok = C218chksum_ok;
- break;
- default:
- key = C320_key;
- keycode = C320_KeyCode;
- loadbuf = C320_LoadBuf;
- loadlen = C320DLoad_len;
- checksum = C320check_sum;
- checksum_ok = C320chksum_ok;
- break;
- }
-
- usum = 0;
- wlen = len >> 1;
- for (i = 0; i < wlen; i++)
- usum += le16_to_cpu(uptr[i]);
- retry = 0;
- do {
- wlen = len >> 1;
- j = 0;
- while (wlen) {
- len2 = (wlen > 2048) ? 2048 : wlen;
- wlen -= len2;
- memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
- j += len2 << 1;
-
- writew(len2, baseAddr + loadlen);
- writew(0, baseAddr + key);
- for (i = 0; i < 100; i++) {
- if (readw(baseAddr + key) == keycode)
- break;
- msleep(10);
- }
- if (readw(baseAddr + key) != keycode)
- return -EIO;
- }
- writew(0, baseAddr + loadlen);
- writew(usum, baseAddr + checksum);
- writew(0, baseAddr + key);
- for (i = 0; i < 100; i++) {
- if (readw(baseAddr + key) == keycode)
- break;
- msleep(10);
- }
- retry++;
- } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
- if (readb(baseAddr + checksum_ok) != 1)
- return -EIO;
-
- writew(0, baseAddr + key);
- for (i = 0; i < 600; i++) {
- if (readw(baseAddr + Magic_no) == Magic_code)
- break;
- msleep(10);
- }
- if (readw(baseAddr + Magic_no) != Magic_code)
- return -EIO;
-
- if (MOXA_IS_320(brd)) {
- if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
- writew(0x3800, baseAddr + TMS320_PORT1);
- writew(0x3900, baseAddr + TMS320_PORT2);
- writew(28499, baseAddr + TMS320_CLOCK);
- } else {
- writew(0x3200, baseAddr + TMS320_PORT1);
- writew(0x3400, baseAddr + TMS320_PORT2);
- writew(19999, baseAddr + TMS320_CLOCK);
- }
- }
- writew(1, baseAddr + Disable_IRQ);
- writew(0, baseAddr + Magic_no);
- for (i = 0; i < 500; i++) {
- if (readw(baseAddr + Magic_no) == Magic_code)
- break;
- msleep(10);
- }
- if (readw(baseAddr + Magic_no) != Magic_code)
- return -EIO;
-
- if (MOXA_IS_320(brd)) {
- j = readw(baseAddr + Module_cnt);
- if (j <= 0)
- return -EIO;
- brd->numPorts = j * 8;
- writew(j, baseAddr + Module_no);
- writew(0, baseAddr + Magic_no);
- for (i = 0; i < 600; i++) {
- if (readw(baseAddr + Magic_no) == Magic_code)
- break;
- msleep(10);
- }
- if (readw(baseAddr + Magic_no) != Magic_code)
- return -EIO;
- }
- brd->intNdx = baseAddr + IRQindex;
- brd->intPend = baseAddr + IRQpending;
- brd->intTable = baseAddr + IRQtable;
-
- return 0;
-}
-
-static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
- size_t len)
-{
- void __iomem *ofsAddr, *baseAddr = brd->basemem;
- struct moxa_port *port;
- int retval, i;
-
- if (len % 2) {
- printk(KERN_ERR "MOXA: bios length is not even\n");
- return -EINVAL;
- }
-
- retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
- if (retval)
- return retval;
-
- switch (brd->boardType) {
- case MOXA_BOARD_C218_ISA:
- case MOXA_BOARD_C218_PCI:
- case MOXA_BOARD_CP204J:
- port = brd->ports;
- for (i = 0; i < brd->numPorts; i++, port++) {
- port->board = brd;
- port->DCDState = 0;
- port->tableAddr = baseAddr + Extern_table +
- Extern_size * i;
- ofsAddr = port->tableAddr;
- writew(C218rx_mask, ofsAddr + RX_mask);
- writew(C218tx_mask, ofsAddr + TX_mask);
- writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
- writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
-
- writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
- writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
-
- }
- break;
- default:
- port = brd->ports;
- for (i = 0; i < brd->numPorts; i++, port++) {
- port->board = brd;
- port->DCDState = 0;
- port->tableAddr = baseAddr + Extern_table +
- Extern_size * i;
- ofsAddr = port->tableAddr;
- switch (brd->numPorts) {
- case 8:
- writew(C320p8rx_mask, ofsAddr + RX_mask);
- writew(C320p8tx_mask, ofsAddr + TX_mask);
- writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
- writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
- writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
- writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
-
- break;
- case 16:
- writew(C320p16rx_mask, ofsAddr + RX_mask);
- writew(C320p16tx_mask, ofsAddr + TX_mask);
- writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
- writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
- writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
- writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
- break;
-
- case 24:
- writew(C320p24rx_mask, ofsAddr + RX_mask);
- writew(C320p24tx_mask, ofsAddr + TX_mask);
- writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
- writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
- writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
- writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
- break;
- case 32:
- writew(C320p32rx_mask, ofsAddr + RX_mask);
- writew(C320p32tx_mask, ofsAddr + TX_mask);
- writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
- writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
- writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
- writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
- writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
- break;
- }
- }
- break;
- }
- return 0;
-}
-
-static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
-{
- const void *ptr = fw->data;
- char rsn[64];
- u16 lens[5];
- size_t len;
- unsigned int a, lenp, lencnt;
- int ret = -EINVAL;
- struct {
- __le32 magic; /* 0x34303430 */
- u8 reserved1[2];
- u8 type; /* UNIX = 3 */
- u8 model; /* C218T=1, C320T=2, CP204=3 */
- u8 reserved2[8];
- __le16 len[5];
- } const *hdr = ptr;
-
- BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
-
- if (fw->size < MOXA_FW_HDRLEN) {
- strcpy(rsn, "too short (even header won't fit)");
- goto err;
- }
- if (hdr->magic != cpu_to_le32(0x30343034)) {
- sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
- goto err;
- }
- if (hdr->type != 3) {
- sprintf(rsn, "not for linux, type is %u", hdr->type);
- goto err;
- }
- if (moxa_check_fw_model(brd, hdr->model)) {
- sprintf(rsn, "not for this card, model is %u", hdr->model);
- goto err;
- }
-
- len = MOXA_FW_HDRLEN;
- lencnt = hdr->model == 2 ? 5 : 3;
- for (a = 0; a < ARRAY_SIZE(lens); a++) {
- lens[a] = le16_to_cpu(hdr->len[a]);
- if (lens[a] && len + lens[a] <= fw->size &&
- moxa_check_fw(&fw->data[len]))
- printk(KERN_WARNING "MOXA firmware: unexpected input "
- "at offset %u, but going on\n", (u32)len);
- if (!lens[a] && a < lencnt) {
- sprintf(rsn, "too few entries in fw file");
- goto err;
- }
- len += lens[a];
- }
-
- if (len != fw->size) {
- sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
- (u32)len);
- goto err;
- }
-
- ptr += MOXA_FW_HDRLEN;
- lenp = 0; /* bios */
-
- strcpy(rsn, "read above");
-
- ret = moxa_load_bios(brd, ptr, lens[lenp]);
- if (ret)
- goto err;
-
- /* we skip the tty section (lens[1]), since we don't need it */
- ptr += lens[lenp] + lens[lenp + 1];
- lenp += 2; /* comm */
-
- if (hdr->model == 2) {
- ret = moxa_load_320b(brd, ptr, lens[lenp]);
- if (ret)
- goto err;
- /* skip another tty */
- ptr += lens[lenp] + lens[lenp + 1];
- lenp += 2;
- }
-
- ret = moxa_load_code(brd, ptr, lens[lenp]);
- if (ret)
- goto err;
-
- return 0;
-err:
- printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
- return ret;
-}
-
-static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
-{
- const struct firmware *fw;
- const char *file;
- struct moxa_port *p;
- unsigned int i;
- int ret;
-
- brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
- GFP_KERNEL);
- if (brd->ports == NULL) {
- printk(KERN_ERR "cannot allocate memory for ports\n");
- ret = -ENOMEM;
- goto err;
- }
-
- for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
- tty_port_init(&p->port);
- p->port.ops = &moxa_port_ops;
- p->type = PORT_16550A;
- p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
- }
-
- switch (brd->boardType) {
- case MOXA_BOARD_C218_ISA:
- case MOXA_BOARD_C218_PCI:
- file = "c218tunx.cod";
- break;
- case MOXA_BOARD_CP204J:
- file = "cp204unx.cod";
- break;
- default:
- file = "c320tunx.cod";
- break;
- }
-
- ret = request_firmware(&fw, file, dev);
- if (ret) {
- printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
- "you've placed '%s' file into your firmware "
- "loader directory (e.g. /lib/firmware)\n",
- file);
- goto err_free;
- }
-
- ret = moxa_load_fw(brd, fw);
-
- release_firmware(fw);
-
- if (ret)
- goto err_free;
-
- spin_lock_bh(&moxa_lock);
- brd->ready = 1;
- if (!timer_pending(&moxaTimer))
- mod_timer(&moxaTimer, jiffies + HZ / 50);
- spin_unlock_bh(&moxa_lock);
-
- return 0;
-err_free:
- kfree(brd->ports);
-err:
- return ret;
-}
-
-static void moxa_board_deinit(struct moxa_board_conf *brd)
-{
- unsigned int a, opened;
-
- mutex_lock(&moxa_openlock);
- spin_lock_bh(&moxa_lock);
- brd->ready = 0;
- spin_unlock_bh(&moxa_lock);
-
- /* pci hot-un-plug support */
- for (a = 0; a < brd->numPorts; a++)
- if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
- struct tty_struct *tty = tty_port_tty_get(
- &brd->ports[a].port);
- if (tty) {
- tty_hangup(tty);
- tty_kref_put(tty);
- }
- }
- while (1) {
- opened = 0;
- for (a = 0; a < brd->numPorts; a++)
- if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
- opened++;
- mutex_unlock(&moxa_openlock);
- if (!opened)
- break;
- msleep(50);
- mutex_lock(&moxa_openlock);
- }
-
- iounmap(brd->basemem);
- brd->basemem = NULL;
- kfree(brd->ports);
-}
-
-#ifdef CONFIG_PCI
-static int __devinit moxa_pci_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
- struct moxa_board_conf *board;
- unsigned int i;
- int board_type = ent->driver_data;
- int retval;
-
- retval = pci_enable_device(pdev);
- if (retval) {
- dev_err(&pdev->dev, "can't enable pci device\n");
- goto err;
- }
-
- for (i = 0; i < MAX_BOARDS; i++)
- if (moxa_boards[i].basemem == NULL)
- break;
-
- retval = -ENODEV;
- if (i >= MAX_BOARDS) {
- dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
- "found. Board is ignored.\n", MAX_BOARDS);
- goto err;
- }
-
- board = &moxa_boards[i];
-
- retval = pci_request_region(pdev, 2, "moxa-base");
- if (retval) {
- dev_err(&pdev->dev, "can't request pci region 2\n");
- goto err;
- }
-
- board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
- if (board->basemem == NULL) {
- dev_err(&pdev->dev, "can't remap io space 2\n");
- goto err_reg;
- }
-
- board->boardType = board_type;
- switch (board_type) {
- case MOXA_BOARD_C218_ISA:
- case MOXA_BOARD_C218_PCI:
- board->numPorts = 8;
- break;
-
- case MOXA_BOARD_CP204J:
- board->numPorts = 4;
- break;
- default:
- board->numPorts = 0;
- break;
- }
- board->busType = MOXA_BUS_TYPE_PCI;
-
- retval = moxa_init_board(board, &pdev->dev);
- if (retval)
- goto err_base;
-
- pci_set_drvdata(pdev, board);
-
- dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
- moxa_brdname[board_type - 1], board->numPorts);
-
- return 0;
-err_base:
- iounmap(board->basemem);
- board->basemem = NULL;
-err_reg:
- pci_release_region(pdev, 2);
-err:
- return retval;
-}
-
-static void __devexit moxa_pci_remove(struct pci_dev *pdev)
-{
- struct moxa_board_conf *brd = pci_get_drvdata(pdev);
-
- moxa_board_deinit(brd);
-
- pci_release_region(pdev, 2);
-}
-
-static struct pci_driver moxa_pci_driver = {
- .name = "moxa",
- .id_table = moxa_pcibrds,
- .probe = moxa_pci_probe,
- .remove = __devexit_p(moxa_pci_remove)
-};
-#endif /* CONFIG_PCI */
-
-static int __init moxa_init(void)
-{
- unsigned int isabrds = 0;
- int retval = 0;
- struct moxa_board_conf *brd = moxa_boards;
- unsigned int i;
-
- printk(KERN_INFO "MOXA Intellio family driver version %s\n",
- MOXA_VERSION);
- moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
- if (!moxaDriver)
- return -ENOMEM;
-
- moxaDriver->owner = THIS_MODULE;
- moxaDriver->name = "ttyMX";
- moxaDriver->major = ttymajor;
- moxaDriver->minor_start = 0;
- moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
- moxaDriver->subtype = SERIAL_TYPE_NORMAL;
- moxaDriver->init_termios = tty_std_termios;
- moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
- moxaDriver->init_termios.c_ispeed = 9600;
- moxaDriver->init_termios.c_ospeed = 9600;
- moxaDriver->flags = TTY_DRIVER_REAL_RAW;
- tty_set_operations(moxaDriver, &moxa_ops);
-
- if (tty_register_driver(moxaDriver)) {
- printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
- put_tty_driver(moxaDriver);
- return -1;
- }
-
- /* Find the boards defined from module args. */
-
- for (i = 0; i < MAX_BOARDS; i++) {
- if (!baseaddr[i])
- break;
- if (type[i] == MOXA_BOARD_C218_ISA ||
- type[i] == MOXA_BOARD_C320_ISA) {
- pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
- isabrds + 1, moxa_brdname[type[i] - 1],
- baseaddr[i]);
- brd->boardType = type[i];
- brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
- numports[i];
- brd->busType = MOXA_BUS_TYPE_ISA;
- brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
- if (!brd->basemem) {
- printk(KERN_ERR "MOXA: can't remap %lx\n",
- baseaddr[i]);
- continue;
- }
- if (moxa_init_board(brd, NULL)) {
- iounmap(brd->basemem);
- brd->basemem = NULL;
- continue;
- }
-
- printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
- "ready (%u ports, firmware loaded)\n",
- baseaddr[i], brd->numPorts);
-
- brd++;
- isabrds++;
- }
- }
-
-#ifdef CONFIG_PCI
- retval = pci_register_driver(&moxa_pci_driver);
- if (retval) {
- printk(KERN_ERR "Can't register MOXA pci driver!\n");
- if (isabrds)
- retval = 0;
- }
-#endif
-
- return retval;
-}
-
-static void __exit moxa_exit(void)
-{
- unsigned int i;
-
-#ifdef CONFIG_PCI
- pci_unregister_driver(&moxa_pci_driver);
-#endif
-
- for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
- if (moxa_boards[i].ready)
- moxa_board_deinit(&moxa_boards[i]);
-
- del_timer_sync(&moxaTimer);
-
- if (tty_unregister_driver(moxaDriver))
- printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
- "serial driver\n");
- put_tty_driver(moxaDriver);
-}
-
-module_init(moxa_init);
-module_exit(moxa_exit);
-
-static void moxa_shutdown(struct tty_port *port)
-{
- struct moxa_port *ch = container_of(port, struct moxa_port, port);
- MoxaPortDisable(ch);
- MoxaPortFlushData(ch, 2);
- clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
-}
-
-static int moxa_carrier_raised(struct tty_port *port)
-{
- struct moxa_port *ch = container_of(port, struct moxa_port, port);
- int dcd;
-
- spin_lock_irq(&port->lock);
- dcd = ch->DCDState;
- spin_unlock_irq(&port->lock);
- return dcd;
-}
-
-static void moxa_dtr_rts(struct tty_port *port, int onoff)
-{
- struct moxa_port *ch = container_of(port, struct moxa_port, port);
- MoxaPortLineCtrl(ch, onoff, onoff);
-}
-
-
-static int moxa_open(struct tty_struct *tty, struct file *filp)
-{
- struct moxa_board_conf *brd;
- struct moxa_port *ch;
- int port;
- int retval;
-
- port = tty->index;
- if (port == MAX_PORTS) {
- return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
- }
- if (mutex_lock_interruptible(&moxa_openlock))
- return -ERESTARTSYS;
- brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
- if (!brd->ready) {
- mutex_unlock(&moxa_openlock);
- return -ENODEV;
- }
-
- if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
- mutex_unlock(&moxa_openlock);
- return -ENODEV;
- }
-
- ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
- ch->port.count++;
- tty->driver_data = ch;
- tty_port_tty_set(&ch->port, tty);
- mutex_lock(&ch->port.mutex);
- if (!(ch->port.flags & ASYNC_INITIALIZED)) {
- ch->statusflags = 0;
- moxa_set_tty_param(tty, tty->termios);
- MoxaPortLineCtrl(ch, 1, 1);
- MoxaPortEnable(ch);
- MoxaSetFifo(ch, ch->type == PORT_16550A);
- ch->port.flags |= ASYNC_INITIALIZED;
- }
- mutex_unlock(&ch->port.mutex);
- mutex_unlock(&moxa_openlock);
-
- retval = tty_port_block_til_ready(&ch->port, tty, filp);
- if (retval == 0)
- set_bit(ASYNCB_NORMAL_ACTIVE, &ch->port.flags);
- return retval;
-}
-
-static void moxa_close(struct tty_struct *tty, struct file *filp)
-{
- struct moxa_port *ch = tty->driver_data;
- ch->cflag = tty->termios->c_cflag;
- tty_port_close(&ch->port, tty, filp);
-}
-
-static int moxa_write(struct tty_struct *tty,
- const unsigned char *buf, int count)
-{
- struct moxa_port *ch = tty->driver_data;
- int len;
-
- if (ch == NULL)
- return 0;
-
- spin_lock_bh(&moxa_lock);
- len = MoxaPortWriteData(tty, buf, count);
- spin_unlock_bh(&moxa_lock);
-
- set_bit(LOWWAIT, &ch->statusflags);
- return len;
-}
-
-static int moxa_write_room(struct tty_struct *tty)
-{
- struct moxa_port *ch;
-
- if (tty->stopped)
- return 0;
- ch = tty->driver_data;
- if (ch == NULL)
- return 0;
- return MoxaPortTxFree(ch);
-}
-
-static void moxa_flush_buffer(struct tty_struct *tty)
-{
- struct moxa_port *ch = tty->driver_data;
-
- if (ch == NULL)
- return;
- MoxaPortFlushData(ch, 1);
- tty_wakeup(tty);
-}
-
-static int moxa_chars_in_buffer(struct tty_struct *tty)
-{
- struct moxa_port *ch = tty->driver_data;
- int chars;
-
- chars = MoxaPortTxQueue(ch);
- if (chars)
- /*
- * Make it possible to wakeup anything waiting for output
- * in tty_ioctl.c, etc.
- */
- set_bit(EMPTYWAIT, &ch->statusflags);
- return chars;
-}
-
-static int moxa_tiocmget(struct tty_struct *tty)
-{
- struct moxa_port *ch = tty->driver_data;
- int flag = 0, dtr, rts;
-
- MoxaPortGetLineOut(ch, &dtr, &rts);
- if (dtr)
- flag |= TIOCM_DTR;
- if (rts)
- flag |= TIOCM_RTS;
- dtr = MoxaPortLineStatus(ch);
- if (dtr & 1)
- flag |= TIOCM_CTS;
- if (dtr & 2)
- flag |= TIOCM_DSR;
- if (dtr & 4)
- flag |= TIOCM_CD;
- return flag;
-}
-
-static int moxa_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- struct moxa_port *ch;
- int port;
- int dtr, rts;
-
- port = tty->index;
- mutex_lock(&moxa_openlock);
- ch = tty->driver_data;
- if (!ch) {
- mutex_unlock(&moxa_openlock);
- return -EINVAL;
- }
-
- MoxaPortGetLineOut(ch, &dtr, &rts);
- if (set & TIOCM_RTS)
- rts = 1;
- if (set & TIOCM_DTR)
- dtr = 1;
- if (clear & TIOCM_RTS)
- rts = 0;
- if (clear & TIOCM_DTR)
- dtr = 0;
- MoxaPortLineCtrl(ch, dtr, rts);
- mutex_unlock(&moxa_openlock);
- return 0;
-}
-
-static void moxa_set_termios(struct tty_struct *tty,
- struct ktermios *old_termios)
-{
- struct moxa_port *ch = tty->driver_data;
-
- if (ch == NULL)
- return;
- moxa_set_tty_param(tty, old_termios);
- if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
- wake_up_interruptible(&ch->port.open_wait);
-}
-
-static void moxa_stop(struct tty_struct *tty)
-{
- struct moxa_port *ch = tty->driver_data;
-
- if (ch == NULL)
- return;
- MoxaPortTxDisable(ch);
- set_bit(TXSTOPPED, &ch->statusflags);
-}
-
-
-static void moxa_start(struct tty_struct *tty)
-{
- struct moxa_port *ch = tty->driver_data;
-
- if (ch == NULL)
- return;
-
- if (!(ch->statusflags & TXSTOPPED))
- return;
-
- MoxaPortTxEnable(ch);
- clear_bit(TXSTOPPED, &ch->statusflags);
-}
-
-static void moxa_hangup(struct tty_struct *tty)
-{
- struct moxa_port *ch = tty->driver_data;
- tty_port_hangup(&ch->port);
-}
-
-static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
-{
- struct tty_struct *tty;
- unsigned long flags;
- dcd = !!dcd;
-
- spin_lock_irqsave(&p->port.lock, flags);
- if (dcd != p->DCDState) {
- p->DCDState = dcd;
- spin_unlock_irqrestore(&p->port.lock, flags);
- tty = tty_port_tty_get(&p->port);
- if (tty && C_CLOCAL(tty) && !dcd)
- tty_hangup(tty);
- tty_kref_put(tty);
- }
- else
- spin_unlock_irqrestore(&p->port.lock, flags);
-}
-
-static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
- u16 __iomem *ip)
-{
- struct tty_struct *tty = tty_port_tty_get(&p->port);
- void __iomem *ofsAddr;
- unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
- u16 intr;
-
- if (tty) {
- if (test_bit(EMPTYWAIT, &p->statusflags) &&
- MoxaPortTxQueue(p) == 0) {
- clear_bit(EMPTYWAIT, &p->statusflags);
- tty_wakeup(tty);
- }
- if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped &&
- MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
- clear_bit(LOWWAIT, &p->statusflags);
- tty_wakeup(tty);
- }
-
- if (inited && !test_bit(TTY_THROTTLED, &tty->flags) &&
- MoxaPortRxQueue(p) > 0) { /* RX */
- MoxaPortReadData(p);
- tty_schedule_flip(tty);
- }
- } else {
- clear_bit(EMPTYWAIT, &p->statusflags);
- MoxaPortFlushData(p, 0); /* flush RX */
- }
-
- if (!handle) /* nothing else to do */
- goto put;
-
- intr = readw(ip); /* port irq status */
- if (intr == 0)
- goto put;
-
- writew(0, ip); /* ACK port */
- ofsAddr = p->tableAddr;
- if (intr & IntrTx) /* disable tx intr */
- writew(readw(ofsAddr + HostStat) & ~WakeupTx,
- ofsAddr + HostStat);
-
- if (!inited)
- goto put;
-
- if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
- tty_insert_flip_char(tty, 0, TTY_BREAK);
- tty_schedule_flip(tty);
- }
-
- if (intr & IntrLine)
- moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
-put:
- tty_kref_put(tty);
-
- return 0;
-}
-
-static void moxa_poll(unsigned long ignored)
-{
- struct moxa_board_conf *brd;
- u16 __iomem *ip;
- unsigned int card, port, served = 0;
-
- spin_lock(&moxa_lock);
- for (card = 0; card < MAX_BOARDS; card++) {
- brd = &moxa_boards[card];
- if (!brd->ready)
- continue;
-
- served++;
-
- ip = NULL;
- if (readb(brd->intPend) == 0xff)
- ip = brd->intTable + readb(brd->intNdx);
-
- for (port = 0; port < brd->numPorts; port++)
- moxa_poll_port(&brd->ports[port], !!ip, ip + port);
-
- if (ip)
- writeb(0, brd->intPend); /* ACK */
-
- if (moxaLowWaterChk) {
- struct moxa_port *p = brd->ports;
- for (port = 0; port < brd->numPorts; port++, p++)
- if (p->lowChkFlag) {
- p->lowChkFlag = 0;
- moxa_low_water_check(p->tableAddr);
- }
- }
- }
- moxaLowWaterChk = 0;
-
- if (served)
- mod_timer(&moxaTimer, jiffies + HZ / 50);
- spin_unlock(&moxa_lock);
-}
-
-/******************************************************************************/
-
-static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
-{
- register struct ktermios *ts = tty->termios;
- struct moxa_port *ch = tty->driver_data;
- int rts, cts, txflow, rxflow, xany, baud;
-
- rts = cts = txflow = rxflow = xany = 0;
- if (ts->c_cflag & CRTSCTS)
- rts = cts = 1;
- if (ts->c_iflag & IXON)
- txflow = 1;
- if (ts->c_iflag & IXOFF)
- rxflow = 1;
- if (ts->c_iflag & IXANY)
- xany = 1;
-
- /* Clear the features we don't support */
- ts->c_cflag &= ~CMSPAR;
- MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
- baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
- if (baud == -1)
- baud = tty_termios_baud_rate(old_termios);
- /* Not put the baud rate into the termios data */
- tty_encode_baud_rate(tty, baud, baud);
-}
-
-/*****************************************************************************
- * Driver level functions: *
- *****************************************************************************/
-
-static void MoxaPortFlushData(struct moxa_port *port, int mode)
-{
- void __iomem *ofsAddr;
- if (mode < 0 || mode > 2)
- return;
- ofsAddr = port->tableAddr;
- moxafunc(ofsAddr, FC_FlushQueue, mode);
- if (mode != 1) {
- port->lowChkFlag = 0;
- moxa_low_water_check(ofsAddr);
- }
-}
-
-/*
- * Moxa Port Number Description:
- *
- * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
- * the port number using in MOXA driver functions will be 0 to 31 for
- * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
- * to 127 for fourth. For example, if you setup three MOXA boards,
- * first board is C218, second board is C320-16 and third board is
- * C320-32. The port number of first board (C218 - 8 ports) is from
- * 0 to 7. The port number of second board (C320 - 16 ports) is form
- * 32 to 47. The port number of third board (C320 - 32 ports) is from
- * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
- * 127 will be invalid.
- *
- *
- * Moxa Functions Description:
- *
- * Function 1: Driver initialization routine, this routine must be
- * called when initialized driver.
- * Syntax:
- * void MoxaDriverInit();
- *
- *
- * Function 2: Moxa driver private IOCTL command processing.
- * Syntax:
- * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
- *
- * unsigned int cmd : IOCTL command
- * unsigned long arg : IOCTL argument
- * int port : port number (0 - 127)
- *
- * return: 0 (OK)
- * -EINVAL
- * -ENOIOCTLCMD
- *
- *
- * Function 6: Enable this port to start Tx/Rx data.
- * Syntax:
- * void MoxaPortEnable(int port);
- * int port : port number (0 - 127)
- *
- *
- * Function 7: Disable this port
- * Syntax:
- * void MoxaPortDisable(int port);
- * int port : port number (0 - 127)
- *
- *
- * Function 10: Setting baud rate of this port.
- * Syntax:
- * speed_t MoxaPortSetBaud(int port, speed_t baud);
- * int port : port number (0 - 127)
- * long baud : baud rate (50 - 115200)
- *
- * return: 0 : this port is invalid or baud < 50
- * 50 - 115200 : the real baud rate set to the port, if
- * the argument baud is large than maximun
- * available baud rate, the real setting
- * baud rate will be the maximun baud rate.
- *
- *
- * Function 12: Configure the port.
- * Syntax:
- * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
- * int port : port number (0 - 127)
- * struct ktermios * termio : termio structure pointer
- * speed_t baud : baud rate
- *
- * return: -1 : this port is invalid or termio == NULL
- * 0 : setting O.K.
- *
- *
- * Function 13: Get the DTR/RTS state of this port.
- * Syntax:
- * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
- * int port : port number (0 - 127)
- * int * dtrState : pointer to INT to receive the current DTR
- * state. (if NULL, this function will not
- * write to this address)
- * int * rtsState : pointer to INT to receive the current RTS
- * state. (if NULL, this function will not
- * write to this address)
- *
- * return: -1 : this port is invalid
- * 0 : O.K.
- *
- *
- * Function 14: Setting the DTR/RTS output state of this port.
- * Syntax:
- * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
- * int port : port number (0 - 127)
- * int dtrState : DTR output state (0: off, 1: on)
- * int rtsState : RTS output state (0: off, 1: on)
- *
- *
- * Function 15: Setting the flow control of this port.
- * Syntax:
- * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
- * int txFlow,int xany);
- * int port : port number (0 - 127)
- * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
- * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
- * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
- * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
- * int xany : S/W XANY flow control (0: no, 1: yes)
- *
- *
- * Function 16: Get ths line status of this port
- * Syntax:
- * int MoxaPortLineStatus(int port);
- * int port : port number (0 - 127)
- *
- * return: Bit 0 - CTS state (0: off, 1: on)
- * Bit 1 - DSR state (0: off, 1: on)
- * Bit 2 - DCD state (0: off, 1: on)
- *
- *
- * Function 19: Flush the Rx/Tx buffer data of this port.
- * Syntax:
- * void MoxaPortFlushData(int port, int mode);
- * int port : port number (0 - 127)
- * int mode
- * 0 : flush the Rx buffer
- * 1 : flush the Tx buffer
- * 2 : flush the Rx and Tx buffer
- *
- *
- * Function 20: Write data.
- * Syntax:
- * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
- * int port : port number (0 - 127)
- * unsigned char * buffer : pointer to write data buffer.
- * int length : write data length
- *
- * return: 0 - length : real write data length
- *
- *
- * Function 21: Read data.
- * Syntax:
- * int MoxaPortReadData(int port, struct tty_struct *tty);
- * int port : port number (0 - 127)
- * struct tty_struct *tty : tty for data
- *
- * return: 0 - length : real read data length
- *
- *
- * Function 24: Get the Tx buffer current queued data bytes
- * Syntax:
- * int MoxaPortTxQueue(int port);
- * int port : port number (0 - 127)
- *
- * return: .. : Tx buffer current queued data bytes
- *
- *
- * Function 25: Get the Tx buffer current free space
- * Syntax:
- * int MoxaPortTxFree(int port);
- * int port : port number (0 - 127)
- *
- * return: .. : Tx buffer current free space
- *
- *
- * Function 26: Get the Rx buffer current queued data bytes
- * Syntax:
- * int MoxaPortRxQueue(int port);
- * int port : port number (0 - 127)
- *
- * return: .. : Rx buffer current queued data bytes
- *
- *
- * Function 28: Disable port data transmission.
- * Syntax:
- * void MoxaPortTxDisable(int port);
- * int port : port number (0 - 127)
- *
- *
- * Function 29: Enable port data transmission.
- * Syntax:
- * void MoxaPortTxEnable(int port);
- * int port : port number (0 - 127)
- *
- *
- * Function 31: Get the received BREAK signal count and reset it.
- * Syntax:
- * int MoxaPortResetBrkCnt(int port);
- * int port : port number (0 - 127)
- *
- * return: 0 - .. : BREAK signal count
- *
- *
- */
-
-static void MoxaPortEnable(struct moxa_port *port)
-{
- void __iomem *ofsAddr;
- u16 lowwater = 512;
-
- ofsAddr = port->tableAddr;
- writew(lowwater, ofsAddr + Low_water);
- if (MOXA_IS_320(port->board))
- moxafunc(ofsAddr, FC_SetBreakIrq, 0);
- else
- writew(readw(ofsAddr + HostStat) | WakeupBreak,
- ofsAddr + HostStat);
-
- moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
- moxafunc(ofsAddr, FC_FlushQueue, 2);
-
- moxafunc(ofsAddr, FC_EnableCH, Magic_code);
- MoxaPortLineStatus(port);
-}
-
-static void MoxaPortDisable(struct moxa_port *port)
-{
- void __iomem *ofsAddr = port->tableAddr;
-
- moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
- moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
- writew(0, ofsAddr + HostStat);
- moxafunc(ofsAddr, FC_DisableCH, Magic_code);
-}
-
-static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
-{
- void __iomem *ofsAddr = port->tableAddr;
- unsigned int clock, val;
- speed_t max;
-
- max = MOXA_IS_320(port->board) ? 460800 : 921600;
- if (baud < 50)
- return 0;
- if (baud > max)
- baud = max;
- clock = 921600;
- val = clock / baud;
- moxafunc(ofsAddr, FC_SetBaud, val);
- baud = clock / val;
- return baud;
-}
-
-static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
- speed_t baud)
-{
- void __iomem *ofsAddr;
- tcflag_t cflag;
- tcflag_t mode = 0;
-
- ofsAddr = port->tableAddr;
- cflag = termio->c_cflag; /* termio->c_cflag */
-
- mode = termio->c_cflag & CSIZE;
- if (mode == CS5)
- mode = MX_CS5;
- else if (mode == CS6)
- mode = MX_CS6;
- else if (mode == CS7)
- mode = MX_CS7;
- else if (mode == CS8)
- mode = MX_CS8;
-
- if (termio->c_cflag & CSTOPB) {
- if (mode == MX_CS5)
- mode |= MX_STOP15;
- else
- mode |= MX_STOP2;
- } else
- mode |= MX_STOP1;
-
- if (termio->c_cflag & PARENB) {
- if (termio->c_cflag & PARODD)
- mode |= MX_PARODD;
- else
- mode |= MX_PAREVEN;
- } else
- mode |= MX_PARNONE;
-
- moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
-
- if (MOXA_IS_320(port->board) && baud >= 921600)
- return -1;
-
- baud = MoxaPortSetBaud(port, baud);
-
- if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
- spin_lock_irq(&moxafunc_lock);
- writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
- writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
- writeb(FC_SetXonXoff, ofsAddr + FuncCode);
- moxa_wait_finish(ofsAddr);
- spin_unlock_irq(&moxafunc_lock);
-
- }
- return baud;
-}
-
-static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
- int *rtsState)
-{
- if (dtrState)
- *dtrState = !!(port->lineCtrl & DTR_ON);
- if (rtsState)
- *rtsState = !!(port->lineCtrl & RTS_ON);
-
- return 0;
-}
-
-static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
-{
- u8 mode = 0;
-
- if (dtr)
- mode |= DTR_ON;
- if (rts)
- mode |= RTS_ON;
- port->lineCtrl = mode;
- moxafunc(port->tableAddr, FC_LineControl, mode);
-}
-
-static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
- int txflow, int rxflow, int txany)
-{
- int mode = 0;
-
- if (rts)
- mode |= RTS_FlowCtl;
- if (cts)
- mode |= CTS_FlowCtl;
- if (txflow)
- mode |= Tx_FlowCtl;
- if (rxflow)
- mode |= Rx_FlowCtl;
- if (txany)
- mode |= IXM_IXANY;
- moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
-}
-
-static int MoxaPortLineStatus(struct moxa_port *port)
-{
- void __iomem *ofsAddr;
- int val;
-
- ofsAddr = port->tableAddr;
- if (MOXA_IS_320(port->board))
- val = moxafuncret(ofsAddr, FC_LineStatus, 0);
- else
- val = readw(ofsAddr + FlagStat) >> 4;
- val &= 0x0B;
- if (val & 8)
- val |= 4;
- moxa_new_dcdstate(port, val & 8);
- val &= 7;
- return val;
-}
-
-static int MoxaPortWriteData(struct tty_struct *tty,
- const unsigned char *buffer, int len)
-{
- struct moxa_port *port = tty->driver_data;
- void __iomem *baseAddr, *ofsAddr, *ofs;
- unsigned int c, total;
- u16 head, tail, tx_mask, spage, epage;
- u16 pageno, pageofs, bufhead;
-
- ofsAddr = port->tableAddr;
- baseAddr = port->board->basemem;
- tx_mask = readw(ofsAddr + TX_mask);
- spage = readw(ofsAddr + Page_txb);
- epage = readw(ofsAddr + EndPage_txb);
- tail = readw(ofsAddr + TXwptr);
- head = readw(ofsAddr + TXrptr);
- c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
- if (c > len)
- c = len;
- moxaLog.txcnt[port->port.tty->index] += c;
- total = c;
- if (spage == epage) {
- bufhead = readw(ofsAddr + Ofs_txb);
- writew(spage, baseAddr + Control_reg);
- while (c > 0) {
- if (head > tail)
- len = head - tail - 1;
- else
- len = tx_mask + 1 - tail;
- len = (c > len) ? len : c;
- ofs = baseAddr + DynPage_addr + bufhead + tail;
- memcpy_toio(ofs, buffer, len);
- buffer += len;
- tail = (tail + len) & tx_mask;
- c -= len;
- }
- } else {
- pageno = spage + (tail >> 13);
- pageofs = tail & Page_mask;
- while (c > 0) {
- len = Page_size - pageofs;
- if (len > c)
- len = c;
- writeb(pageno, baseAddr + Control_reg);
- ofs = baseAddr + DynPage_addr + pageofs;
- memcpy_toio(ofs, buffer, len);
- buffer += len;
- if (++pageno == epage)
- pageno = spage;
- pageofs = 0;
- c -= len;
- }
- tail = (tail + total) & tx_mask;
- }
- writew(tail, ofsAddr + TXwptr);
- writeb(1, ofsAddr + CD180TXirq); /* start to send */
- return total;
-}
-
-static int MoxaPortReadData(struct moxa_port *port)
-{
- struct tty_struct *tty = port->port.tty;
- unsigned char *dst;
- void __iomem *baseAddr, *ofsAddr, *ofs;
- unsigned int count, len, total;
- u16 tail, rx_mask, spage, epage;
- u16 pageno, pageofs, bufhead, head;
-
- ofsAddr = port->tableAddr;
- baseAddr = port->board->basemem;
- head = readw(ofsAddr + RXrptr);
- tail = readw(ofsAddr + RXwptr);
- rx_mask = readw(ofsAddr + RX_mask);
- spage = readw(ofsAddr + Page_rxb);
- epage = readw(ofsAddr + EndPage_rxb);
- count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
- if (count == 0)
- return 0;
-
- total = count;
- moxaLog.rxcnt[tty->index] += total;
- if (spage == epage) {
- bufhead = readw(ofsAddr + Ofs_rxb);
- writew(spage, baseAddr + Control_reg);
- while (count > 0) {
- ofs = baseAddr + DynPage_addr + bufhead + head;
- len = (tail >= head) ? (tail - head) :
- (rx_mask + 1 - head);
- len = tty_prepare_flip_string(tty, &dst,
- min(len, count));
- memcpy_fromio(dst, ofs, len);
- head = (head + len) & rx_mask;
- count -= len;
- }
- } else {
- pageno = spage + (head >> 13);
- pageofs = head & Page_mask;
- while (count > 0) {
- writew(pageno, baseAddr + Control_reg);
- ofs = baseAddr + DynPage_addr + pageofs;
- len = tty_prepare_flip_string(tty, &dst,
- min(Page_size - pageofs, count));
- memcpy_fromio(dst, ofs, len);
-
- count -= len;
- pageofs = (pageofs + len) & Page_mask;
- if (pageofs == 0 && ++pageno == epage)
- pageno = spage;
- }
- head = (head + total) & rx_mask;
- }
- writew(head, ofsAddr + RXrptr);
- if (readb(ofsAddr + FlagStat) & Xoff_state) {
- moxaLowWaterChk = 1;
- port->lowChkFlag = 1;
- }
- return total;
-}
-
-
-static int MoxaPortTxQueue(struct moxa_port *port)
-{
- void __iomem *ofsAddr = port->tableAddr;
- u16 rptr, wptr, mask;
-
- rptr = readw(ofsAddr + TXrptr);
- wptr = readw(ofsAddr + TXwptr);
- mask = readw(ofsAddr + TX_mask);
- return (wptr - rptr) & mask;
-}
-
-static int MoxaPortTxFree(struct moxa_port *port)
-{
- void __iomem *ofsAddr = port->tableAddr;
- u16 rptr, wptr, mask;
-
- rptr = readw(ofsAddr + TXrptr);
- wptr = readw(ofsAddr + TXwptr);
- mask = readw(ofsAddr + TX_mask);
- return mask - ((wptr - rptr) & mask);
-}
-
-static int MoxaPortRxQueue(struct moxa_port *port)
-{
- void __iomem *ofsAddr = port->tableAddr;
- u16 rptr, wptr, mask;
-
- rptr = readw(ofsAddr + RXrptr);
- wptr = readw(ofsAddr + RXwptr);
- mask = readw(ofsAddr + RX_mask);
- return (wptr - rptr) & mask;
-}
-
-static void MoxaPortTxDisable(struct moxa_port *port)
-{
- moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
-}
-
-static void MoxaPortTxEnable(struct moxa_port *port)
-{
- moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
-}
-
-static int moxa_get_serial_info(struct moxa_port *info,
- struct serial_struct __user *retinfo)
-{
- struct serial_struct tmp = {
- .type = info->type,
- .line = info->port.tty->index,
- .flags = info->port.flags,
- .baud_base = 921600,
- .close_delay = info->port.close_delay
- };
- return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
-}
-
-
-static int moxa_set_serial_info(struct moxa_port *info,
- struct serial_struct __user *new_info)
-{
- struct serial_struct new_serial;
-
- if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
- return -EFAULT;
-
- if (new_serial.irq != 0 || new_serial.port != 0 ||
- new_serial.custom_divisor != 0 ||
- new_serial.baud_base != 921600)
- return -EPERM;
-
- if (!capable(CAP_SYS_ADMIN)) {
- if (((new_serial.flags & ~ASYNC_USR_MASK) !=
- (info->port.flags & ~ASYNC_USR_MASK)))
- return -EPERM;
- } else
- info->port.close_delay = new_serial.close_delay * HZ / 100;
-
- new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
- new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
-
- MoxaSetFifo(info, new_serial.type == PORT_16550A);
-
- info->type = new_serial.type;
- return 0;
-}
-
-
-
-/*****************************************************************************
- * Static local functions: *
- *****************************************************************************/
-
-static void MoxaSetFifo(struct moxa_port *port, int enable)
-{
- void __iomem *ofsAddr = port->tableAddr;
-
- if (!enable) {
- moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
- moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
- } else {
- moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
- moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
- }
-}
+++ /dev/null
-#ifndef MOXA_H_FILE
-#define MOXA_H_FILE
-
-#define MOXA 0x400
-#define MOXA_GET_IQUEUE (MOXA + 1) /* get input buffered count */
-#define MOXA_GET_OQUEUE (MOXA + 2) /* get output buffered count */
-#define MOXA_GETDATACOUNT (MOXA + 23)
-#define MOXA_GET_IOQUEUE (MOXA + 27)
-#define MOXA_FLUSH_QUEUE (MOXA + 28)
-#define MOXA_GETMSTATUS (MOXA + 65)
-
-/*
- * System Configuration
- */
-
-#define Magic_code 0x404
-
-/*
- * for C218 BIOS initialization
- */
-#define C218_ConfBase 0x800
-#define C218_status (C218_ConfBase + 0) /* BIOS running status */
-#define C218_diag (C218_ConfBase + 2) /* diagnostic status */
-#define C218_key (C218_ConfBase + 4) /* WORD (0x218 for C218) */
-#define C218DLoad_len (C218_ConfBase + 6) /* WORD */
-#define C218check_sum (C218_ConfBase + 8) /* BYTE */
-#define C218chksum_ok (C218_ConfBase + 0x0a) /* BYTE (1:ok) */
-#define C218_TestRx (C218_ConfBase + 0x10) /* 8 bytes for 8 ports */
-#define C218_TestTx (C218_ConfBase + 0x18) /* 8 bytes for 8 ports */
-#define C218_RXerr (C218_ConfBase + 0x20) /* 8 bytes for 8 ports */
-#define C218_ErrFlag (C218_ConfBase + 0x28) /* 8 bytes for 8 ports */
-
-#define C218_LoadBuf 0x0F00
-#define C218_KeyCode 0x218
-#define CP204J_KeyCode 0x204
-
-/*
- * for C320 BIOS initialization
- */
-#define C320_ConfBase 0x800
-#define C320_LoadBuf 0x0f00
-#define STS_init 0x05 /* for C320_status */
-
-#define C320_status C320_ConfBase + 0 /* BIOS running status */
-#define C320_diag C320_ConfBase + 2 /* diagnostic status */
-#define C320_key C320_ConfBase + 4 /* WORD (0320H for C320) */
-#define C320DLoad_len C320_ConfBase + 6 /* WORD */
-#define C320check_sum C320_ConfBase + 8 /* WORD */
-#define C320chksum_ok C320_ConfBase + 0x0a /* WORD (1:ok) */
-#define C320bapi_len C320_ConfBase + 0x0c /* WORD */
-#define C320UART_no C320_ConfBase + 0x0e /* WORD */
-
-#define C320_KeyCode 0x320
-
-#define FixPage_addr 0x0000 /* starting addr of static page */
-#define DynPage_addr 0x2000 /* starting addr of dynamic page */
-#define C218_start 0x3000 /* starting addr of C218 BIOS prg */
-#define Control_reg 0x1ff0 /* select page and reset control */
-#define HW_reset 0x80
-
-/*
- * Function Codes
- */
-#define FC_CardReset 0x80
-#define FC_ChannelReset 1 /* C320 firmware not supported */
-#define FC_EnableCH 2
-#define FC_DisableCH 3
-#define FC_SetParam 4
-#define FC_SetMode 5
-#define FC_SetRate 6
-#define FC_LineControl 7
-#define FC_LineStatus 8
-#define FC_XmitControl 9
-#define FC_FlushQueue 10
-#define FC_SendBreak 11
-#define FC_StopBreak 12
-#define FC_LoopbackON 13
-#define FC_LoopbackOFF 14
-#define FC_ClrIrqTable 15
-#define FC_SendXon 16
-#define FC_SetTermIrq 17 /* C320 firmware not supported */
-#define FC_SetCntIrq 18 /* C320 firmware not supported */
-#define FC_SetBreakIrq 19
-#define FC_SetLineIrq 20
-#define FC_SetFlowCtl 21
-#define FC_GenIrq 22
-#define FC_InCD180 23
-#define FC_OutCD180 24
-#define FC_InUARTreg 23
-#define FC_OutUARTreg 24
-#define FC_SetXonXoff 25
-#define FC_OutCD180CCR 26
-#define FC_ExtIQueue 27
-#define FC_ExtOQueue 28
-#define FC_ClrLineIrq 29
-#define FC_HWFlowCtl 30
-#define FC_GetClockRate 35
-#define FC_SetBaud 36
-#define FC_SetDataMode 41
-#define FC_GetCCSR 43
-#define FC_GetDataError 45
-#define FC_RxControl 50
-#define FC_ImmSend 51
-#define FC_SetXonState 52
-#define FC_SetXoffState 53
-#define FC_SetRxFIFOTrig 54
-#define FC_SetTxFIFOCnt 55
-#define FC_UnixRate 56
-#define FC_UnixResetTimer 57
-
-#define RxFIFOTrig1 0
-#define RxFIFOTrig4 1
-#define RxFIFOTrig8 2
-#define RxFIFOTrig14 3
-
-/*
- * Dual-Ported RAM
- */
-#define DRAM_global 0
-#define INT_data (DRAM_global + 0)
-#define Config_base (DRAM_global + 0x108)
-
-#define IRQindex (INT_data + 0)
-#define IRQpending (INT_data + 4)
-#define IRQtable (INT_data + 8)
-
-/*
- * Interrupt Status
- */
-#define IntrRx 0x01 /* receiver data O.K. */
-#define IntrTx 0x02 /* transmit buffer empty */
-#define IntrFunc 0x04 /* function complete */
-#define IntrBreak 0x08 /* received break */
-#define IntrLine 0x10 /* line status change
- for transmitter */
-#define IntrIntr 0x20 /* received INTR code */
-#define IntrQuit 0x40 /* received QUIT code */
-#define IntrEOF 0x80 /* received EOF code */
-
-#define IntrRxTrigger 0x100 /* rx data count reach tigger value */
-#define IntrTxTrigger 0x200 /* tx data count below trigger value */
-
-#define Magic_no (Config_base + 0)
-#define Card_model_no (Config_base + 2)
-#define Total_ports (Config_base + 4)
-#define Module_cnt (Config_base + 8)
-#define Module_no (Config_base + 10)
-#define Timer_10ms (Config_base + 14)
-#define Disable_IRQ (Config_base + 20)
-#define TMS320_PORT1 (Config_base + 22)
-#define TMS320_PORT2 (Config_base + 24)
-#define TMS320_CLOCK (Config_base + 26)
-
-/*
- * DATA BUFFER in DRAM
- */
-#define Extern_table 0x400 /* Base address of the external table
- (24 words * 64) total 3K bytes
- (24 words * 128) total 6K bytes */
-#define Extern_size 0x60 /* 96 bytes */
-#define RXrptr 0x00 /* read pointer for RX buffer */
-#define RXwptr 0x02 /* write pointer for RX buffer */
-#define TXrptr 0x04 /* read pointer for TX buffer */
-#define TXwptr 0x06 /* write pointer for TX buffer */
-#define HostStat 0x08 /* IRQ flag and general flag */
-#define FlagStat 0x0A
-#define FlowControl 0x0C /* B7 B6 B5 B4 B3 B2 B1 B0 */
- /* x x x x | | | | */
- /* | | | + CTS flow */
- /* | | +--- RTS flow */
- /* | +------ TX Xon/Xoff */
- /* +--------- RX Xon/Xoff */
-#define Break_cnt 0x0E /* received break count */
-#define CD180TXirq 0x10 /* if non-0: enable TX irq */
-#define RX_mask 0x12
-#define TX_mask 0x14
-#define Ofs_rxb 0x16
-#define Ofs_txb 0x18
-#define Page_rxb 0x1A
-#define Page_txb 0x1C
-#define EndPage_rxb 0x1E
-#define EndPage_txb 0x20
-#define Data_error 0x22
-#define RxTrigger 0x28
-#define TxTrigger 0x2a
-
-#define rRXwptr 0x34
-#define Low_water 0x36
-
-#define FuncCode 0x40
-#define FuncArg 0x42
-#define FuncArg1 0x44
-
-#define C218rx_size 0x2000 /* 8K bytes */
-#define C218tx_size 0x8000 /* 32K bytes */
-
-#define C218rx_mask (C218rx_size - 1)
-#define C218tx_mask (C218tx_size - 1)
-
-#define C320p8rx_size 0x2000
-#define C320p8tx_size 0x8000
-#define C320p8rx_mask (C320p8rx_size - 1)
-#define C320p8tx_mask (C320p8tx_size - 1)
-
-#define C320p16rx_size 0x2000
-#define C320p16tx_size 0x4000
-#define C320p16rx_mask (C320p16rx_size - 1)
-#define C320p16tx_mask (C320p16tx_size - 1)
-
-#define C320p24rx_size 0x2000
-#define C320p24tx_size 0x2000
-#define C320p24rx_mask (C320p24rx_size - 1)
-#define C320p24tx_mask (C320p24tx_size - 1)
-
-#define C320p32rx_size 0x1000
-#define C320p32tx_size 0x1000
-#define C320p32rx_mask (C320p32rx_size - 1)
-#define C320p32tx_mask (C320p32tx_size - 1)
-
-#define Page_size 0x2000U
-#define Page_mask (Page_size - 1)
-#define C218rx_spage 3
-#define C218tx_spage 4
-#define C218rx_pageno 1
-#define C218tx_pageno 4
-#define C218buf_pageno 5
-
-#define C320p8rx_spage 3
-#define C320p8tx_spage 4
-#define C320p8rx_pgno 1
-#define C320p8tx_pgno 4
-#define C320p8buf_pgno 5
-
-#define C320p16rx_spage 3
-#define C320p16tx_spage 4
-#define C320p16rx_pgno 1
-#define C320p16tx_pgno 2
-#define C320p16buf_pgno 3
-
-#define C320p24rx_spage 3
-#define C320p24tx_spage 4
-#define C320p24rx_pgno 1
-#define C320p24tx_pgno 1
-#define C320p24buf_pgno 2
-
-#define C320p32rx_spage 3
-#define C320p32tx_ofs C320p32rx_size
-#define C320p32tx_spage 3
-#define C320p32buf_pgno 1
-
-/*
- * Host Status
- */
-#define WakeupRx 0x01
-#define WakeupTx 0x02
-#define WakeupBreak 0x08
-#define WakeupLine 0x10
-#define WakeupIntr 0x20
-#define WakeupQuit 0x40
-#define WakeupEOF 0x80 /* used in VTIME control */
-#define WakeupRxTrigger 0x100
-#define WakeupTxTrigger 0x200
-/*
- * Flag status
- */
-#define Rx_over 0x01
-#define Xoff_state 0x02
-#define Tx_flowOff 0x04
-#define Tx_enable 0x08
-#define CTS_state 0x10
-#define DSR_state 0x20
-#define DCD_state 0x80
-/*
- * FlowControl
- */
-#define CTS_FlowCtl 1
-#define RTS_FlowCtl 2
-#define Tx_FlowCtl 4
-#define Rx_FlowCtl 8
-#define IXM_IXANY 0x10
-
-#define LowWater 128
-
-#define DTR_ON 1
-#define RTS_ON 2
-#define CTS_ON 1
-#define DSR_ON 2
-#define DCD_ON 8
-
-/* mode definition */
-#define MX_CS8 0x03
-#define MX_CS7 0x02
-#define MX_CS6 0x01
-#define MX_CS5 0x00
-
-#define MX_STOP1 0x00
-#define MX_STOP15 0x04
-#define MX_STOP2 0x08
-
-#define MX_PARNONE 0x00
-#define MX_PAREVEN 0x40
-#define MX_PARODD 0xC0
-
-#endif
+++ /dev/null
-/*
- * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
- *
- * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com).
- * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com>
- *
- * This code is loosely based on the 1.8 moxa driver which is based on
- * Linux serial driver, written by Linus Torvalds, Theodore T'so and
- * others.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
- * <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
- * www.moxa.com.
- * - Fixed x86_64 cleanness
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/serial_reg.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/mm.h>
-#include <linux/delay.h>
-#include <linux/pci.h>
-#include <linux/bitops.h>
-#include <linux/slab.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-
-#include "mxser.h"
-
-#define MXSER_VERSION "2.0.5" /* 1.14 */
-#define MXSERMAJOR 174
-
-#define MXSER_BOARDS 4 /* Max. boards */
-#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
-#define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
-#define MXSER_ISR_PASS_LIMIT 100
-
-/*CheckIsMoxaMust return value*/
-#define MOXA_OTHER_UART 0x00
-#define MOXA_MUST_MU150_HWID 0x01
-#define MOXA_MUST_MU860_HWID 0x02
-
-#define WAKEUP_CHARS 256
-
-#define UART_MCR_AFE 0x20
-#define UART_LSR_SPECIAL 0x1E
-
-#define PCI_DEVICE_ID_POS104UL 0x1044
-#define PCI_DEVICE_ID_CB108 0x1080
-#define PCI_DEVICE_ID_CP102UF 0x1023
-#define PCI_DEVICE_ID_CP112UL 0x1120
-#define PCI_DEVICE_ID_CB114 0x1142
-#define PCI_DEVICE_ID_CP114UL 0x1143
-#define PCI_DEVICE_ID_CB134I 0x1341
-#define PCI_DEVICE_ID_CP138U 0x1380
-
-
-#define C168_ASIC_ID 1
-#define C104_ASIC_ID 2
-#define C102_ASIC_ID 0xB
-#define CI132_ASIC_ID 4
-#define CI134_ASIC_ID 3
-#define CI104J_ASIC_ID 5
-
-#define MXSER_HIGHBAUD 1
-#define MXSER_HAS2 2
-
-/* This is only for PCI */
-static const struct {
- int type;
- int tx_fifo;
- int rx_fifo;
- int xmit_fifo_size;
- int rx_high_water;
- int rx_trigger;
- int rx_low_water;
- long max_baud;
-} Gpci_uart_info[] = {
- {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
- {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
- {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
-};
-#define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
-
-struct mxser_cardinfo {
- char *name;
- unsigned int nports;
- unsigned int flags;
-};
-
-static const struct mxser_cardinfo mxser_cards[] = {
-/* 0*/ { "C168 series", 8, },
- { "C104 series", 4, },
- { "CI-104J series", 4, },
- { "C168H/PCI series", 8, },
- { "C104H/PCI series", 4, },
-/* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
- { "CI-132 series", 4, MXSER_HAS2 },
- { "CI-134 series", 4, },
- { "CP-132 series", 2, },
- { "CP-114 series", 4, },
-/*10*/ { "CT-114 series", 4, },
- { "CP-102 series", 2, MXSER_HIGHBAUD },
- { "CP-104U series", 4, },
- { "CP-168U series", 8, },
- { "CP-132U series", 2, },
-/*15*/ { "CP-134U series", 4, },
- { "CP-104JU series", 4, },
- { "Moxa UC7000 Serial", 8, }, /* RC7000 */
- { "CP-118U series", 8, },
- { "CP-102UL series", 2, },
-/*20*/ { "CP-102U series", 2, },
- { "CP-118EL series", 8, },
- { "CP-168EL series", 8, },
- { "CP-104EL series", 4, },
- { "CB-108 series", 8, },
-/*25*/ { "CB-114 series", 4, },
- { "CB-134I series", 4, },
- { "CP-138U series", 8, },
- { "POS-104UL series", 4, },
- { "CP-114UL series", 4, },
-/*30*/ { "CP-102UF series", 2, },
- { "CP-112UL series", 2, },
-};
-
-/* driver_data correspond to the lines in the structure above
- see also ISA probe function before you change something */
-static struct pci_device_id mxser_pcibrds[] = {
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 },
- { }
-};
-MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
-
-static unsigned long ioaddr[MXSER_BOARDS];
-static int ttymajor = MXSERMAJOR;
-
-/* Variables for insmod */
-
-MODULE_AUTHOR("Casper Yang");
-MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
-module_param_array(ioaddr, ulong, NULL, 0);
-MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
-module_param(ttymajor, int, 0);
-MODULE_LICENSE("GPL");
-
-struct mxser_log {
- int tick;
- unsigned long rxcnt[MXSER_PORTS];
- unsigned long txcnt[MXSER_PORTS];
-};
-
-struct mxser_mon {
- unsigned long rxcnt;
- unsigned long txcnt;
- unsigned long up_rxcnt;
- unsigned long up_txcnt;
- int modem_status;
- unsigned char hold_reason;
-};
-
-struct mxser_mon_ext {
- unsigned long rx_cnt[32];
- unsigned long tx_cnt[32];
- unsigned long up_rxcnt[32];
- unsigned long up_txcnt[32];
- int modem_status[32];
-
- long baudrate[32];
- int databits[32];
- int stopbits[32];
- int parity[32];
- int flowctrl[32];
- int fifo[32];
- int iftype[32];
-};
-
-struct mxser_board;
-
-struct mxser_port {
- struct tty_port port;
- struct mxser_board *board;
-
- unsigned long ioaddr;
- unsigned long opmode_ioaddr;
- int max_baud;
-
- int rx_high_water;
- int rx_trigger; /* Rx fifo trigger level */
- int rx_low_water;
- int baud_base; /* max. speed */
- int type; /* UART type */
-
- int x_char; /* xon/xoff character */
- int IER; /* Interrupt Enable Register */
- int MCR; /* Modem control register */
-
- unsigned char stop_rx;
- unsigned char ldisc_stop_rx;
-
- int custom_divisor;
- unsigned char err_shadow;
-
- struct async_icount icount; /* kernel counters for 4 input interrupts */
- int timeout;
-
- int read_status_mask;
- int ignore_status_mask;
- int xmit_fifo_size;
- int xmit_head;
- int xmit_tail;
- int xmit_cnt;
-
- struct ktermios normal_termios;
-
- struct mxser_mon mon_data;
-
- spinlock_t slock;
-};
-
-struct mxser_board {
- unsigned int idx;
- int irq;
- const struct mxser_cardinfo *info;
- unsigned long vector;
- unsigned long vector_mask;
-
- int chip_flag;
- int uart_type;
-
- struct mxser_port ports[MXSER_PORTS_PER_BOARD];
-};
-
-struct mxser_mstatus {
- tcflag_t cflag;
- int cts;
- int dsr;
- int ri;
- int dcd;
-};
-
-static struct mxser_board mxser_boards[MXSER_BOARDS];
-static struct tty_driver *mxvar_sdriver;
-static struct mxser_log mxvar_log;
-static int mxser_set_baud_method[MXSER_PORTS + 1];
-
-static void mxser_enable_must_enchance_mode(unsigned long baseio)
-{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr |= MOXA_MUST_EFR_EFRB_ENABLE;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-
-#ifdef CONFIG_PCI
-static void mxser_disable_must_enchance_mode(unsigned long baseio)
-{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-#endif
-
-static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
-{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_BANK_MASK;
- efr |= MOXA_MUST_EFR_BANK0;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(value, baseio + MOXA_MUST_XON1_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-
-static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
-{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_BANK_MASK;
- efr |= MOXA_MUST_EFR_BANK0;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-
-static void mxser_set_must_fifo_value(struct mxser_port *info)
-{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(info->ioaddr + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
-
- efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_BANK_MASK;
- efr |= MOXA_MUST_EFR_BANK1;
-
- outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
- outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
- outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
- outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
- outb(oldlcr, info->ioaddr + UART_LCR);
-}
-
-static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
-{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_BANK_MASK;
- efr |= MOXA_MUST_EFR_BANK2;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-
-#ifdef CONFIG_PCI
-static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
-{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_BANK_MASK;
- efr |= MOXA_MUST_EFR_BANK2;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-#endif
-
-static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
-{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_SF_MASK;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-
-static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
-{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
- efr |= MOXA_MUST_EFR_SF_TX1;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-
-static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
-{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-
-static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
-{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
- efr |= MOXA_MUST_EFR_SF_RX1;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-
-static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
-{
- u8 oldlcr;
- u8 efr;
-
- oldlcr = inb(baseio + UART_LCR);
- outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
-
- efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
- efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
-
- outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
- outb(oldlcr, baseio + UART_LCR);
-}
-
-#ifdef CONFIG_PCI
-static int __devinit CheckIsMoxaMust(unsigned long io)
-{
- u8 oldmcr, hwid;
- int i;
-
- outb(0, io + UART_LCR);
- mxser_disable_must_enchance_mode(io);
- oldmcr = inb(io + UART_MCR);
- outb(0, io + UART_MCR);
- mxser_set_must_xon1_value(io, 0x11);
- if ((hwid = inb(io + UART_MCR)) != 0) {
- outb(oldmcr, io + UART_MCR);
- return MOXA_OTHER_UART;
- }
-
- mxser_get_must_hardware_id(io, &hwid);
- for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
- if (hwid == Gpci_uart_info[i].type)
- return (int)hwid;
- }
- return MOXA_OTHER_UART;
-}
-#endif
-
-static void process_txrx_fifo(struct mxser_port *info)
-{
- int i;
-
- if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
- info->rx_trigger = 1;
- info->rx_high_water = 1;
- info->rx_low_water = 1;
- info->xmit_fifo_size = 1;
- } else
- for (i = 0; i < UART_INFO_NUM; i++)
- if (info->board->chip_flag == Gpci_uart_info[i].type) {
- info->rx_trigger = Gpci_uart_info[i].rx_trigger;
- info->rx_low_water = Gpci_uart_info[i].rx_low_water;
- info->rx_high_water = Gpci_uart_info[i].rx_high_water;
- info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
- break;
- }
-}
-
-static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
-{
- static unsigned char mxser_msr[MXSER_PORTS + 1];
- unsigned char status = 0;
-
- status = inb(baseaddr + UART_MSR);
-
- mxser_msr[port] &= 0x0F;
- mxser_msr[port] |= status;
- status = mxser_msr[port];
- if (mode)
- mxser_msr[port] = 0;
-
- return status;
-}
-
-static int mxser_carrier_raised(struct tty_port *port)
-{
- struct mxser_port *mp = container_of(port, struct mxser_port, port);
- return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
-}
-
-static void mxser_dtr_rts(struct tty_port *port, int on)
-{
- struct mxser_port *mp = container_of(port, struct mxser_port, port);
- unsigned long flags;
-
- spin_lock_irqsave(&mp->slock, flags);
- if (on)
- outb(inb(mp->ioaddr + UART_MCR) |
- UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
- else
- outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
- mp->ioaddr + UART_MCR);
- spin_unlock_irqrestore(&mp->slock, flags);
-}
-
-static int mxser_set_baud(struct tty_struct *tty, long newspd)
-{
- struct mxser_port *info = tty->driver_data;
- int quot = 0, baud;
- unsigned char cval;
-
- if (!info->ioaddr)
- return -1;
-
- if (newspd > info->max_baud)
- return -1;
-
- if (newspd == 134) {
- quot = 2 * info->baud_base / 269;
- tty_encode_baud_rate(tty, 134, 134);
- } else if (newspd) {
- quot = info->baud_base / newspd;
- if (quot == 0)
- quot = 1;
- baud = info->baud_base/quot;
- tty_encode_baud_rate(tty, baud, baud);
- } else {
- quot = 0;
- }
-
- info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
- info->timeout += HZ / 50; /* Add .02 seconds of slop */
-
- if (quot) {
- info->MCR |= UART_MCR_DTR;
- outb(info->MCR, info->ioaddr + UART_MCR);
- } else {
- info->MCR &= ~UART_MCR_DTR;
- outb(info->MCR, info->ioaddr + UART_MCR);
- return 0;
- }
-
- cval = inb(info->ioaddr + UART_LCR);
-
- outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
-
- outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
- outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
- outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
-
-#ifdef BOTHER
- if (C_BAUD(tty) == BOTHER) {
- quot = info->baud_base % newspd;
- quot *= 8;
- if (quot % newspd > newspd / 2) {
- quot /= newspd;
- quot++;
- } else
- quot /= newspd;
-
- mxser_set_must_enum_value(info->ioaddr, quot);
- } else
-#endif
- mxser_set_must_enum_value(info->ioaddr, 0);
-
- return 0;
-}
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static int mxser_change_speed(struct tty_struct *tty,
- struct ktermios *old_termios)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned cflag, cval, fcr;
- int ret = 0;
- unsigned char status;
-
- cflag = tty->termios->c_cflag;
- if (!info->ioaddr)
- return ret;
-
- if (mxser_set_baud_method[tty->index] == 0)
- mxser_set_baud(tty, tty_get_baud_rate(tty));
-
- /* byte size and parity */
- switch (cflag & CSIZE) {
- case CS5:
- cval = 0x00;
- break;
- case CS6:
- cval = 0x01;
- break;
- case CS7:
- cval = 0x02;
- break;
- case CS8:
- cval = 0x03;
- break;
- default:
- cval = 0x00;
- break; /* too keep GCC shut... */
- }
- if (cflag & CSTOPB)
- cval |= 0x04;
- if (cflag & PARENB)
- cval |= UART_LCR_PARITY;
- if (!(cflag & PARODD))
- cval |= UART_LCR_EPAR;
- if (cflag & CMSPAR)
- cval |= UART_LCR_SPAR;
-
- if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
- if (info->board->chip_flag) {
- fcr = UART_FCR_ENABLE_FIFO;
- fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
- mxser_set_must_fifo_value(info);
- } else
- fcr = 0;
- } else {
- fcr = UART_FCR_ENABLE_FIFO;
- if (info->board->chip_flag) {
- fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
- mxser_set_must_fifo_value(info);
- } else {
- switch (info->rx_trigger) {
- case 1:
- fcr |= UART_FCR_TRIGGER_1;
- break;
- case 4:
- fcr |= UART_FCR_TRIGGER_4;
- break;
- case 8:
- fcr |= UART_FCR_TRIGGER_8;
- break;
- default:
- fcr |= UART_FCR_TRIGGER_14;
- break;
- }
- }
- }
-
- /* CTS flow control flag and modem status interrupts */
- info->IER &= ~UART_IER_MSI;
- info->MCR &= ~UART_MCR_AFE;
- if (cflag & CRTSCTS) {
- info->port.flags |= ASYNC_CTS_FLOW;
- info->IER |= UART_IER_MSI;
- if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
- info->MCR |= UART_MCR_AFE;
- } else {
- status = inb(info->ioaddr + UART_MSR);
- if (tty->hw_stopped) {
- if (status & UART_MSR_CTS) {
- tty->hw_stopped = 0;
- if (info->type != PORT_16550A &&
- !info->board->chip_flag) {
- outb(info->IER & ~UART_IER_THRI,
- info->ioaddr +
- UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr +
- UART_IER);
- }
- tty_wakeup(tty);
- }
- } else {
- if (!(status & UART_MSR_CTS)) {
- tty->hw_stopped = 1;
- if ((info->type != PORT_16550A) &&
- (!info->board->chip_flag)) {
- info->IER &= ~UART_IER_THRI;
- outb(info->IER, info->ioaddr +
- UART_IER);
- }
- }
- }
- }
- } else {
- info->port.flags &= ~ASYNC_CTS_FLOW;
- }
- outb(info->MCR, info->ioaddr + UART_MCR);
- if (cflag & CLOCAL) {
- info->port.flags &= ~ASYNC_CHECK_CD;
- } else {
- info->port.flags |= ASYNC_CHECK_CD;
- info->IER |= UART_IER_MSI;
- }
- outb(info->IER, info->ioaddr + UART_IER);
-
- /*
- * Set up parity check flag
- */
- info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
- if (I_INPCK(tty))
- info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
- if (I_BRKINT(tty) || I_PARMRK(tty))
- info->read_status_mask |= UART_LSR_BI;
-
- info->ignore_status_mask = 0;
-
- if (I_IGNBRK(tty)) {
- info->ignore_status_mask |= UART_LSR_BI;
- info->read_status_mask |= UART_LSR_BI;
- /*
- * If we're ignore parity and break indicators, ignore
- * overruns too. (For real raw support).
- */
- if (I_IGNPAR(tty)) {
- info->ignore_status_mask |=
- UART_LSR_OE |
- UART_LSR_PE |
- UART_LSR_FE;
- info->read_status_mask |=
- UART_LSR_OE |
- UART_LSR_PE |
- UART_LSR_FE;
- }
- }
- if (info->board->chip_flag) {
- mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
- mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
- if (I_IXON(tty)) {
- mxser_enable_must_rx_software_flow_control(
- info->ioaddr);
- } else {
- mxser_disable_must_rx_software_flow_control(
- info->ioaddr);
- }
- if (I_IXOFF(tty)) {
- mxser_enable_must_tx_software_flow_control(
- info->ioaddr);
- } else {
- mxser_disable_must_tx_software_flow_control(
- info->ioaddr);
- }
- }
-
-
- outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
- outb(cval, info->ioaddr + UART_LCR);
-
- return ret;
-}
-
-static void mxser_check_modem_status(struct tty_struct *tty,
- struct mxser_port *port, int status)
-{
- /* update input line counters */
- if (status & UART_MSR_TERI)
- port->icount.rng++;
- if (status & UART_MSR_DDSR)
- port->icount.dsr++;
- if (status & UART_MSR_DDCD)
- port->icount.dcd++;
- if (status & UART_MSR_DCTS)
- port->icount.cts++;
- port->mon_data.modem_status = status;
- wake_up_interruptible(&port->port.delta_msr_wait);
-
- if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
- if (status & UART_MSR_DCD)
- wake_up_interruptible(&port->port.open_wait);
- }
-
- if (port->port.flags & ASYNC_CTS_FLOW) {
- if (tty->hw_stopped) {
- if (status & UART_MSR_CTS) {
- tty->hw_stopped = 0;
-
- if ((port->type != PORT_16550A) &&
- (!port->board->chip_flag)) {
- outb(port->IER & ~UART_IER_THRI,
- port->ioaddr + UART_IER);
- port->IER |= UART_IER_THRI;
- outb(port->IER, port->ioaddr +
- UART_IER);
- }
- tty_wakeup(tty);
- }
- } else {
- if (!(status & UART_MSR_CTS)) {
- tty->hw_stopped = 1;
- if (port->type != PORT_16550A &&
- !port->board->chip_flag) {
- port->IER &= ~UART_IER_THRI;
- outb(port->IER, port->ioaddr +
- UART_IER);
- }
- }
- }
- }
-}
-
-static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
-{
- struct mxser_port *info = container_of(port, struct mxser_port, port);
- unsigned long page;
- unsigned long flags;
-
- page = __get_free_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
-
- spin_lock_irqsave(&info->slock, flags);
-
- if (!info->ioaddr || !info->type) {
- set_bit(TTY_IO_ERROR, &tty->flags);
- free_page(page);
- spin_unlock_irqrestore(&info->slock, flags);
- return 0;
- }
- info->port.xmit_buf = (unsigned char *) page;
-
- /*
- * Clear the FIFO buffers and disable them
- * (they will be reenabled in mxser_change_speed())
- */
- if (info->board->chip_flag)
- outb((UART_FCR_CLEAR_RCVR |
- UART_FCR_CLEAR_XMIT |
- MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
- else
- outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
- info->ioaddr + UART_FCR);
-
- /*
- * At this point there's no way the LSR could still be 0xFF;
- * if it is, then bail out, because there's likely no UART
- * here.
- */
- if (inb(info->ioaddr + UART_LSR) == 0xff) {
- spin_unlock_irqrestore(&info->slock, flags);
- if (capable(CAP_SYS_ADMIN)) {
- set_bit(TTY_IO_ERROR, &tty->flags);
- return 0;
- } else
- return -ENODEV;
- }
-
- /*
- * Clear the interrupt registers.
- */
- (void) inb(info->ioaddr + UART_LSR);
- (void) inb(info->ioaddr + UART_RX);
- (void) inb(info->ioaddr + UART_IIR);
- (void) inb(info->ioaddr + UART_MSR);
-
- /*
- * Now, initialize the UART
- */
- outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
- info->MCR = UART_MCR_DTR | UART_MCR_RTS;
- outb(info->MCR, info->ioaddr + UART_MCR);
-
- /*
- * Finally, enable interrupts
- */
- info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
-
- if (info->board->chip_flag)
- info->IER |= MOXA_MUST_IER_EGDAI;
- outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
-
- /*
- * And clear the interrupt registers again for luck.
- */
- (void) inb(info->ioaddr + UART_LSR);
- (void) inb(info->ioaddr + UART_RX);
- (void) inb(info->ioaddr + UART_IIR);
- (void) inb(info->ioaddr + UART_MSR);
-
- clear_bit(TTY_IO_ERROR, &tty->flags);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-
- /*
- * and set the speed of the serial port
- */
- mxser_change_speed(tty, NULL);
- spin_unlock_irqrestore(&info->slock, flags);
-
- return 0;
-}
-
-/*
- * This routine will shutdown a serial port
- */
-static void mxser_shutdown_port(struct tty_port *port)
-{
- struct mxser_port *info = container_of(port, struct mxser_port, port);
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
-
- /*
- * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
- * here so the queue might never be waken up
- */
- wake_up_interruptible(&info->port.delta_msr_wait);
-
- /*
- * Free the xmit buffer, if necessary
- */
- if (info->port.xmit_buf) {
- free_page((unsigned long) info->port.xmit_buf);
- info->port.xmit_buf = NULL;
- }
-
- info->IER = 0;
- outb(0x00, info->ioaddr + UART_IER);
-
- /* clear Rx/Tx FIFO's */
- if (info->board->chip_flag)
- outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
- MOXA_MUST_FCR_GDA_MODE_ENABLE,
- info->ioaddr + UART_FCR);
- else
- outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
- info->ioaddr + UART_FCR);
-
- /* read data port to reset things */
- (void) inb(info->ioaddr + UART_RX);
-
-
- if (info->board->chip_flag)
- SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
-
- spin_unlock_irqrestore(&info->slock, flags);
-}
-
-/*
- * This routine is called whenever a serial port is opened. It
- * enables interrupts for a serial port, linking in its async structure into
- * the IRQ chain. It also performs the serial-specific
- * initialization for the tty structure.
- */
-static int mxser_open(struct tty_struct *tty, struct file *filp)
-{
- struct mxser_port *info;
- int line;
-
- line = tty->index;
- if (line == MXSER_PORTS)
- return 0;
- if (line < 0 || line > MXSER_PORTS)
- return -ENODEV;
- info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
- if (!info->ioaddr)
- return -ENODEV;
-
- tty->driver_data = info;
- return tty_port_open(&info->port, tty, filp);
-}
-
-static void mxser_flush_buffer(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- char fcr;
- unsigned long flags;
-
-
- spin_lock_irqsave(&info->slock, flags);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-
- fcr = inb(info->ioaddr + UART_FCR);
- outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
- info->ioaddr + UART_FCR);
- outb(fcr, info->ioaddr + UART_FCR);
-
- spin_unlock_irqrestore(&info->slock, flags);
-
- tty_wakeup(tty);
-}
-
-
-static void mxser_close_port(struct tty_port *port)
-{
- struct mxser_port *info = container_of(port, struct mxser_port, port);
- unsigned long timeout;
- /*
- * At this point we stop accepting input. To do this, we
- * disable the receive line status interrupts, and tell the
- * interrupt driver to stop checking the data ready bit in the
- * line status register.
- */
- info->IER &= ~UART_IER_RLSI;
- if (info->board->chip_flag)
- info->IER &= ~MOXA_MUST_RECV_ISR;
-
- outb(info->IER, info->ioaddr + UART_IER);
- /*
- * Before we drop DTR, make sure the UART transmitter
- * has completely drained; this is especially
- * important if there is a transmit FIFO!
- */
- timeout = jiffies + HZ;
- while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
- schedule_timeout_interruptible(5);
- if (time_after(jiffies, timeout))
- break;
- }
-}
-
-/*
- * This routine is called when the serial port gets closed. First, we
- * wait for the last remaining data to be sent. Then, we unlink its
- * async structure from the interrupt chain if necessary, and we free
- * that IRQ if nothing is left in the chain.
- */
-static void mxser_close(struct tty_struct *tty, struct file *filp)
-{
- struct mxser_port *info = tty->driver_data;
- struct tty_port *port = &info->port;
-
- if (tty->index == MXSER_PORTS || info == NULL)
- return;
- if (tty_port_close_start(port, tty, filp) == 0)
- return;
- mutex_lock(&port->mutex);
- mxser_close_port(port);
- mxser_flush_buffer(tty);
- mxser_shutdown_port(port);
- clear_bit(ASYNCB_INITIALIZED, &port->flags);
- mutex_unlock(&port->mutex);
- /* Right now the tty_port set is done outside of the close_end helper
- as we don't yet have everyone using refcounts */
- tty_port_close_end(port, tty);
- tty_port_tty_set(port, NULL);
-}
-
-static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
-{
- int c, total = 0;
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- if (!info->port.xmit_buf)
- return 0;
-
- while (1) {
- c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
- SERIAL_XMIT_SIZE - info->xmit_head));
- if (c <= 0)
- break;
-
- memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
- spin_lock_irqsave(&info->slock, flags);
- info->xmit_head = (info->xmit_head + c) &
- (SERIAL_XMIT_SIZE - 1);
- info->xmit_cnt += c;
- spin_unlock_irqrestore(&info->slock, flags);
-
- buf += c;
- count -= c;
- total += c;
- }
-
- if (info->xmit_cnt && !tty->stopped) {
- if (!tty->hw_stopped ||
- (info->type == PORT_16550A) ||
- (info->board->chip_flag)) {
- spin_lock_irqsave(&info->slock, flags);
- outb(info->IER & ~UART_IER_THRI, info->ioaddr +
- UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- spin_unlock_irqrestore(&info->slock, flags);
- }
- }
- return total;
-}
-
-static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- if (!info->port.xmit_buf)
- return 0;
-
- if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
- return 0;
-
- spin_lock_irqsave(&info->slock, flags);
- info->port.xmit_buf[info->xmit_head++] = ch;
- info->xmit_head &= SERIAL_XMIT_SIZE - 1;
- info->xmit_cnt++;
- spin_unlock_irqrestore(&info->slock, flags);
- if (!tty->stopped) {
- if (!tty->hw_stopped ||
- (info->type == PORT_16550A) ||
- info->board->chip_flag) {
- spin_lock_irqsave(&info->slock, flags);
- outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- spin_unlock_irqrestore(&info->slock, flags);
- }
- }
- return 1;
-}
-
-
-static void mxser_flush_chars(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
- (tty->hw_stopped && info->type != PORT_16550A &&
- !info->board->chip_flag))
- return;
-
- spin_lock_irqsave(&info->slock, flags);
-
- outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
-
- spin_unlock_irqrestore(&info->slock, flags);
-}
-
-static int mxser_write_room(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- int ret;
-
- ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
- return ret < 0 ? 0 : ret;
-}
-
-static int mxser_chars_in_buffer(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- return info->xmit_cnt;
-}
-
-/*
- * ------------------------------------------------------------
- * friends of mxser_ioctl()
- * ------------------------------------------------------------
- */
-static int mxser_get_serial_info(struct tty_struct *tty,
- struct serial_struct __user *retinfo)
-{
- struct mxser_port *info = tty->driver_data;
- struct serial_struct tmp = {
- .type = info->type,
- .line = tty->index,
- .port = info->ioaddr,
- .irq = info->board->irq,
- .flags = info->port.flags,
- .baud_base = info->baud_base,
- .close_delay = info->port.close_delay,
- .closing_wait = info->port.closing_wait,
- .custom_divisor = info->custom_divisor,
- .hub6 = 0
- };
- if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
- return -EFAULT;
- return 0;
-}
-
-static int mxser_set_serial_info(struct tty_struct *tty,
- struct serial_struct __user *new_info)
-{
- struct mxser_port *info = tty->driver_data;
- struct tty_port *port = &info->port;
- struct serial_struct new_serial;
- speed_t baud;
- unsigned long sl_flags;
- unsigned int flags;
- int retval = 0;
-
- if (!new_info || !info->ioaddr)
- return -ENODEV;
- if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
- return -EFAULT;
-
- if (new_serial.irq != info->board->irq ||
- new_serial.port != info->ioaddr)
- return -EINVAL;
-
- flags = port->flags & ASYNC_SPD_MASK;
-
- if (!capable(CAP_SYS_ADMIN)) {
- if ((new_serial.baud_base != info->baud_base) ||
- (new_serial.close_delay != info->port.close_delay) ||
- ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
- return -EPERM;
- info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
- (new_serial.flags & ASYNC_USR_MASK));
- } else {
- /*
- * OK, past this point, all the error checking has been done.
- * At this point, we start making changes.....
- */
- port->flags = ((port->flags & ~ASYNC_FLAGS) |
- (new_serial.flags & ASYNC_FLAGS));
- port->close_delay = new_serial.close_delay * HZ / 100;
- port->closing_wait = new_serial.closing_wait * HZ / 100;
- tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
- if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
- (new_serial.baud_base != info->baud_base ||
- new_serial.custom_divisor !=
- info->custom_divisor)) {
- if (new_serial.custom_divisor == 0)
- return -EINVAL;
- baud = new_serial.baud_base / new_serial.custom_divisor;
- tty_encode_baud_rate(tty, baud, baud);
- }
- }
-
- info->type = new_serial.type;
-
- process_txrx_fifo(info);
-
- if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
- if (flags != (port->flags & ASYNC_SPD_MASK)) {
- spin_lock_irqsave(&info->slock, sl_flags);
- mxser_change_speed(tty, NULL);
- spin_unlock_irqrestore(&info->slock, sl_flags);
- }
- } else {
- retval = mxser_activate(port, tty);
- if (retval == 0)
- set_bit(ASYNCB_INITIALIZED, &port->flags);
- }
- return retval;
-}
-
-/*
- * mxser_get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * is emptied. On bus types like RS485, the transmitter must
- * release the bus after transmitting. This must be done when
- * the transmit shift register is empty, not be done when the
- * transmit holding register is empty. This functionality
- * allows an RS485 driver to be written in user space.
- */
-static int mxser_get_lsr_info(struct mxser_port *info,
- unsigned int __user *value)
-{
- unsigned char status;
- unsigned int result;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- status = inb(info->ioaddr + UART_LSR);
- spin_unlock_irqrestore(&info->slock, flags);
- result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
- return put_user(result, value);
-}
-
-static int mxser_tiocmget(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned char control, status;
- unsigned long flags;
-
-
- if (tty->index == MXSER_PORTS)
- return -ENOIOCTLCMD;
- if (test_bit(TTY_IO_ERROR, &tty->flags))
- return -EIO;
-
- control = info->MCR;
-
- spin_lock_irqsave(&info->slock, flags);
- status = inb(info->ioaddr + UART_MSR);
- if (status & UART_MSR_ANY_DELTA)
- mxser_check_modem_status(tty, info, status);
- spin_unlock_irqrestore(&info->slock, flags);
- return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
- ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
- ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
- ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
- ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
- ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
-}
-
-static int mxser_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
-
- if (tty->index == MXSER_PORTS)
- return -ENOIOCTLCMD;
- if (test_bit(TTY_IO_ERROR, &tty->flags))
- return -EIO;
-
- spin_lock_irqsave(&info->slock, flags);
-
- if (set & TIOCM_RTS)
- info->MCR |= UART_MCR_RTS;
- if (set & TIOCM_DTR)
- info->MCR |= UART_MCR_DTR;
-
- if (clear & TIOCM_RTS)
- info->MCR &= ~UART_MCR_RTS;
- if (clear & TIOCM_DTR)
- info->MCR &= ~UART_MCR_DTR;
-
- outb(info->MCR, info->ioaddr + UART_MCR);
- spin_unlock_irqrestore(&info->slock, flags);
- return 0;
-}
-
-static int __init mxser_program_mode(int port)
-{
- int id, i, j, n;
-
- outb(0, port);
- outb(0, port);
- outb(0, port);
- (void)inb(port);
- (void)inb(port);
- outb(0, port);
- (void)inb(port);
-
- id = inb(port + 1) & 0x1F;
- if ((id != C168_ASIC_ID) &&
- (id != C104_ASIC_ID) &&
- (id != C102_ASIC_ID) &&
- (id != CI132_ASIC_ID) &&
- (id != CI134_ASIC_ID) &&
- (id != CI104J_ASIC_ID))
- return -1;
- for (i = 0, j = 0; i < 4; i++) {
- n = inb(port + 2);
- if (n == 'M') {
- j = 1;
- } else if ((j == 1) && (n == 1)) {
- j = 2;
- break;
- } else
- j = 0;
- }
- if (j != 2)
- id = -2;
- return id;
-}
-
-static void __init mxser_normal_mode(int port)
-{
- int i, n;
-
- outb(0xA5, port + 1);
- outb(0x80, port + 3);
- outb(12, port + 0); /* 9600 bps */
- outb(0, port + 1);
- outb(0x03, port + 3); /* 8 data bits */
- outb(0x13, port + 4); /* loop back mode */
- for (i = 0; i < 16; i++) {
- n = inb(port + 5);
- if ((n & 0x61) == 0x60)
- break;
- if ((n & 1) == 1)
- (void)inb(port);
- }
- outb(0x00, port + 4);
-}
-
-#define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
-#define CHIP_DO 0x02 /* Serial Data Output in Eprom */
-#define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
-#define CHIP_DI 0x08 /* Serial Data Input in Eprom */
-#define EN_CCMD 0x000 /* Chip's command register */
-#define EN0_RSARLO 0x008 /* Remote start address reg 0 */
-#define EN0_RSARHI 0x009 /* Remote start address reg 1 */
-#define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
-#define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
-#define EN0_DCFG 0x00E /* Data configuration reg WR */
-#define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
-#define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
-#define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
-static int __init mxser_read_register(int port, unsigned short *regs)
-{
- int i, k, value, id;
- unsigned int j;
-
- id = mxser_program_mode(port);
- if (id < 0)
- return id;
- for (i = 0; i < 14; i++) {
- k = (i & 0x3F) | 0x180;
- for (j = 0x100; j > 0; j >>= 1) {
- outb(CHIP_CS, port);
- if (k & j) {
- outb(CHIP_CS | CHIP_DO, port);
- outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
- } else {
- outb(CHIP_CS, port);
- outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
- }
- }
- (void)inb(port);
- value = 0;
- for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
- outb(CHIP_CS, port);
- outb(CHIP_CS | CHIP_SK, port);
- if (inb(port) & CHIP_DI)
- value |= j;
- }
- regs[i] = value;
- outb(0, port);
- }
- mxser_normal_mode(port);
- return id;
-}
-
-static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
-{
- struct mxser_port *ip;
- struct tty_port *port;
- struct tty_struct *tty;
- int result, status;
- unsigned int i, j;
- int ret = 0;
-
- switch (cmd) {
- case MOXA_GET_MAJOR:
- if (printk_ratelimit())
- printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
- "%x (GET_MAJOR), fix your userspace\n",
- current->comm, cmd);
- return put_user(ttymajor, (int __user *)argp);
-
- case MOXA_CHKPORTENABLE:
- result = 0;
- for (i = 0; i < MXSER_BOARDS; i++)
- for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
- if (mxser_boards[i].ports[j].ioaddr)
- result |= (1 << i);
- return put_user(result, (unsigned long __user *)argp);
- case MOXA_GETDATACOUNT:
- /* The receive side is locked by port->slock but it isn't
- clear that an exact snapshot is worth copying here */
- if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
- ret = -EFAULT;
- return ret;
- case MOXA_GETMSTATUS: {
- struct mxser_mstatus ms, __user *msu = argp;
- for (i = 0; i < MXSER_BOARDS; i++)
- for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
- ip = &mxser_boards[i].ports[j];
- port = &ip->port;
- memset(&ms, 0, sizeof(ms));
-
- mutex_lock(&port->mutex);
- if (!ip->ioaddr)
- goto copy;
-
- tty = tty_port_tty_get(port);
-
- if (!tty || !tty->termios)
- ms.cflag = ip->normal_termios.c_cflag;
- else
- ms.cflag = tty->termios->c_cflag;
- tty_kref_put(tty);
- spin_lock_irq(&ip->slock);
- status = inb(ip->ioaddr + UART_MSR);
- spin_unlock_irq(&ip->slock);
- if (status & UART_MSR_DCD)
- ms.dcd = 1;
- if (status & UART_MSR_DSR)
- ms.dsr = 1;
- if (status & UART_MSR_CTS)
- ms.cts = 1;
- copy:
- mutex_unlock(&port->mutex);
- if (copy_to_user(msu, &ms, sizeof(ms)))
- return -EFAULT;
- msu++;
- }
- return 0;
- }
- case MOXA_ASPP_MON_EXT: {
- struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
- unsigned int cflag, iflag, p;
- u8 opmode;
-
- me = kzalloc(sizeof(*me), GFP_KERNEL);
- if (!me)
- return -ENOMEM;
-
- for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
- for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
- if (p >= ARRAY_SIZE(me->rx_cnt)) {
- i = MXSER_BOARDS;
- break;
- }
- ip = &mxser_boards[i].ports[j];
- port = &ip->port;
-
- mutex_lock(&port->mutex);
- if (!ip->ioaddr) {
- mutex_unlock(&port->mutex);
- continue;
- }
-
- spin_lock_irq(&ip->slock);
- status = mxser_get_msr(ip->ioaddr, 0, p);
-
- if (status & UART_MSR_TERI)
- ip->icount.rng++;
- if (status & UART_MSR_DDSR)
- ip->icount.dsr++;
- if (status & UART_MSR_DDCD)
- ip->icount.dcd++;
- if (status & UART_MSR_DCTS)
- ip->icount.cts++;
-
- ip->mon_data.modem_status = status;
- me->rx_cnt[p] = ip->mon_data.rxcnt;
- me->tx_cnt[p] = ip->mon_data.txcnt;
- me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
- me->up_txcnt[p] = ip->mon_data.up_txcnt;
- me->modem_status[p] =
- ip->mon_data.modem_status;
- spin_unlock_irq(&ip->slock);
-
- tty = tty_port_tty_get(&ip->port);
-
- if (!tty || !tty->termios) {
- cflag = ip->normal_termios.c_cflag;
- iflag = ip->normal_termios.c_iflag;
- me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
- } else {
- cflag = tty->termios->c_cflag;
- iflag = tty->termios->c_iflag;
- me->baudrate[p] = tty_get_baud_rate(tty);
- }
- tty_kref_put(tty);
-
- me->databits[p] = cflag & CSIZE;
- me->stopbits[p] = cflag & CSTOPB;
- me->parity[p] = cflag & (PARENB | PARODD |
- CMSPAR);
-
- if (cflag & CRTSCTS)
- me->flowctrl[p] |= 0x03;
-
- if (iflag & (IXON | IXOFF))
- me->flowctrl[p] |= 0x0C;
-
- if (ip->type == PORT_16550A)
- me->fifo[p] = 1;
-
- opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
- opmode &= OP_MODE_MASK;
- me->iftype[p] = opmode;
- mutex_unlock(&port->mutex);
- }
- }
- if (copy_to_user(argp, me, sizeof(*me)))
- ret = -EFAULT;
- kfree(me);
- return ret;
- }
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
-static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
- struct async_icount *cprev)
-{
- struct async_icount cnow;
- unsigned long flags;
- int ret;
-
- spin_lock_irqsave(&info->slock, flags);
- cnow = info->icount; /* atomic copy */
- spin_unlock_irqrestore(&info->slock, flags);
-
- ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
- ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
- ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
- ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
-
- *cprev = cnow;
-
- return ret;
-}
-
-static int mxser_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct mxser_port *info = tty->driver_data;
- struct tty_port *port = &info->port;
- struct async_icount cnow;
- unsigned long flags;
- void __user *argp = (void __user *)arg;
- int retval;
-
- if (tty->index == MXSER_PORTS)
- return mxser_ioctl_special(cmd, argp);
-
- if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
- int p;
- unsigned long opmode;
- static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
- int shiftbit;
- unsigned char val, mask;
-
- p = tty->index % 4;
- if (cmd == MOXA_SET_OP_MODE) {
- if (get_user(opmode, (int __user *) argp))
- return -EFAULT;
- if (opmode != RS232_MODE &&
- opmode != RS485_2WIRE_MODE &&
- opmode != RS422_MODE &&
- opmode != RS485_4WIRE_MODE)
- return -EFAULT;
- mask = ModeMask[p];
- shiftbit = p * 2;
- spin_lock_irq(&info->slock);
- val = inb(info->opmode_ioaddr);
- val &= mask;
- val |= (opmode << shiftbit);
- outb(val, info->opmode_ioaddr);
- spin_unlock_irq(&info->slock);
- } else {
- shiftbit = p * 2;
- spin_lock_irq(&info->slock);
- opmode = inb(info->opmode_ioaddr) >> shiftbit;
- spin_unlock_irq(&info->slock);
- opmode &= OP_MODE_MASK;
- if (put_user(opmode, (int __user *)argp))
- return -EFAULT;
- }
- return 0;
- }
-
- if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT &&
- test_bit(TTY_IO_ERROR, &tty->flags))
- return -EIO;
-
- switch (cmd) {
- case TIOCGSERIAL:
- mutex_lock(&port->mutex);
- retval = mxser_get_serial_info(tty, argp);
- mutex_unlock(&port->mutex);
- return retval;
- case TIOCSSERIAL:
- mutex_lock(&port->mutex);
- retval = mxser_set_serial_info(tty, argp);
- mutex_unlock(&port->mutex);
- return retval;
- case TIOCSERGETLSR: /* Get line status register */
- return mxser_get_lsr_info(info, argp);
- /*
- * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
- * - mask passed in arg for lines of interest
- * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
- * Caller should use TIOCGICOUNT to see which one it was
- */
- case TIOCMIWAIT:
- spin_lock_irqsave(&info->slock, flags);
- cnow = info->icount; /* note the counters on entry */
- spin_unlock_irqrestore(&info->slock, flags);
-
- return wait_event_interruptible(info->port.delta_msr_wait,
- mxser_cflags_changed(info, arg, &cnow));
- case MOXA_HighSpeedOn:
- return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
- case MOXA_SDS_RSTICOUNTER:
- spin_lock_irq(&info->slock);
- info->mon_data.rxcnt = 0;
- info->mon_data.txcnt = 0;
- spin_unlock_irq(&info->slock);
- return 0;
-
- case MOXA_ASPP_OQUEUE:{
- int len, lsr;
-
- len = mxser_chars_in_buffer(tty);
- spin_lock_irq(&info->slock);
- lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
- spin_unlock_irq(&info->slock);
- len += (lsr ? 0 : 1);
-
- return put_user(len, (int __user *)argp);
- }
- case MOXA_ASPP_MON: {
- int mcr, status;
-
- spin_lock_irq(&info->slock);
- status = mxser_get_msr(info->ioaddr, 1, tty->index);
- mxser_check_modem_status(tty, info, status);
-
- mcr = inb(info->ioaddr + UART_MCR);
- spin_unlock_irq(&info->slock);
-
- if (mcr & MOXA_MUST_MCR_XON_FLAG)
- info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
- else
- info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
-
- if (mcr & MOXA_MUST_MCR_TX_XON)
- info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
- else
- info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
-
- if (tty->hw_stopped)
- info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
- else
- info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
-
- if (copy_to_user(argp, &info->mon_data,
- sizeof(struct mxser_mon)))
- return -EFAULT;
-
- return 0;
- }
- case MOXA_ASPP_LSTATUS: {
- if (put_user(info->err_shadow, (unsigned char __user *)argp))
- return -EFAULT;
-
- info->err_shadow = 0;
- return 0;
- }
- case MOXA_SET_BAUD_METHOD: {
- int method;
-
- if (get_user(method, (int __user *)argp))
- return -EFAULT;
- mxser_set_baud_method[tty->index] = method;
- return put_user(method, (int __user *)argp);
- }
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
-
-static int mxser_get_icount(struct tty_struct *tty,
- struct serial_icounter_struct *icount)
-
-{
- struct mxser_port *info = tty->driver_data;
- struct async_icount cnow;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->slock, flags);
-
- icount->frame = cnow.frame;
- icount->brk = cnow.brk;
- icount->overrun = cnow.overrun;
- icount->buf_overrun = cnow.buf_overrun;
- icount->parity = cnow.parity;
- icount->rx = cnow.rx;
- icount->tx = cnow.tx;
- icount->cts = cnow.cts;
- icount->dsr = cnow.dsr;
- icount->rng = cnow.rng;
- icount->dcd = cnow.dcd;
- return 0;
-}
-
-static void mxser_stoprx(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
-
- info->ldisc_stop_rx = 1;
- if (I_IXOFF(tty)) {
- if (info->board->chip_flag) {
- info->IER &= ~MOXA_MUST_RECV_ISR;
- outb(info->IER, info->ioaddr + UART_IER);
- } else {
- info->x_char = STOP_CHAR(tty);
- outb(0, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- }
- }
-
- if (tty->termios->c_cflag & CRTSCTS) {
- info->MCR &= ~UART_MCR_RTS;
- outb(info->MCR, info->ioaddr + UART_MCR);
- }
-}
-
-/*
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- */
-static void mxser_throttle(struct tty_struct *tty)
-{
- mxser_stoprx(tty);
-}
-
-static void mxser_unthrottle(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
-
- /* startrx */
- info->ldisc_stop_rx = 0;
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else {
- if (info->board->chip_flag) {
- info->IER |= MOXA_MUST_RECV_ISR;
- outb(info->IER, info->ioaddr + UART_IER);
- } else {
- info->x_char = START_CHAR(tty);
- outb(0, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- }
- }
- }
-
- if (tty->termios->c_cflag & CRTSCTS) {
- info->MCR |= UART_MCR_RTS;
- outb(info->MCR, info->ioaddr + UART_MCR);
- }
-}
-
-/*
- * mxser_stop() and mxser_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- */
-static void mxser_stop(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- if (info->IER & UART_IER_THRI) {
- info->IER &= ~UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- }
- spin_unlock_irqrestore(&info->slock, flags);
-}
-
-static void mxser_start(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- if (info->xmit_cnt && info->port.xmit_buf) {
- outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- }
- spin_unlock_irqrestore(&info->slock, flags);
-}
-
-static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- mxser_change_speed(tty, old_termios);
- spin_unlock_irqrestore(&info->slock, flags);
-
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- mxser_start(tty);
- }
-
- /* Handle sw stopped */
- if ((old_termios->c_iflag & IXON) &&
- !(tty->termios->c_iflag & IXON)) {
- tty->stopped = 0;
-
- if (info->board->chip_flag) {
- spin_lock_irqsave(&info->slock, flags);
- mxser_disable_must_rx_software_flow_control(
- info->ioaddr);
- spin_unlock_irqrestore(&info->slock, flags);
- }
-
- mxser_start(tty);
- }
-}
-
-/*
- * mxser_wait_until_sent() --- wait until the transmitter is empty
- */
-static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long orig_jiffies, char_time;
- unsigned long flags;
- int lsr;
-
- if (info->type == PORT_UNKNOWN)
- return;
-
- if (info->xmit_fifo_size == 0)
- return; /* Just in case.... */
-
- orig_jiffies = jiffies;
- /*
- * Set the check interval to be 1/5 of the estimated time to
- * send a single character, and make it at least 1. The check
- * interval should also be less than the timeout.
- *
- * Note: we have to use pretty tight timings here to satisfy
- * the NIST-PCTS.
- */
- char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
- char_time = char_time / 5;
- if (char_time == 0)
- char_time = 1;
- if (timeout && timeout < char_time)
- char_time = timeout;
- /*
- * If the transmitter hasn't cleared in twice the approximate
- * amount of time to send the entire FIFO, it probably won't
- * ever clear. This assumes the UART isn't doing flow
- * control, which is currently the case. Hence, if it ever
- * takes longer than info->timeout, this is probably due to a
- * UART bug of some kind. So, we clamp the timeout parameter at
- * 2*info->timeout.
- */
- if (!timeout || timeout > 2 * info->timeout)
- timeout = 2 * info->timeout;
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
- timeout, char_time);
- printk("jiff=%lu...", jiffies);
-#endif
- spin_lock_irqsave(&info->slock, flags);
- while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
-#endif
- spin_unlock_irqrestore(&info->slock, flags);
- schedule_timeout_interruptible(char_time);
- spin_lock_irqsave(&info->slock, flags);
- if (signal_pending(current))
- break;
- if (timeout && time_after(jiffies, orig_jiffies + timeout))
- break;
- }
- spin_unlock_irqrestore(&info->slock, flags);
- set_current_state(TASK_RUNNING);
-
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
-#endif
-}
-
-/*
- * This routine is called by tty_hangup() when a hangup is signaled.
- */
-static void mxser_hangup(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
-
- mxser_flush_buffer(tty);
- tty_port_hangup(&info->port);
-}
-
-/*
- * mxser_rs_break() --- routine which turns the break handling on or off
- */
-static int mxser_rs_break(struct tty_struct *tty, int break_state)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- if (break_state == -1)
- outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
- info->ioaddr + UART_LCR);
- else
- outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
- info->ioaddr + UART_LCR);
- spin_unlock_irqrestore(&info->slock, flags);
- return 0;
-}
-
-static void mxser_receive_chars(struct tty_struct *tty,
- struct mxser_port *port, int *status)
-{
- unsigned char ch, gdl;
- int ignored = 0;
- int cnt = 0;
- int recv_room;
- int max = 256;
-
- recv_room = tty->receive_room;
- if (recv_room == 0 && !port->ldisc_stop_rx)
- mxser_stoprx(tty);
- if (port->board->chip_flag != MOXA_OTHER_UART) {
-
- if (*status & UART_LSR_SPECIAL)
- goto intr_old;
- if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
- (*status & MOXA_MUST_LSR_RERR))
- goto intr_old;
- if (*status & MOXA_MUST_LSR_RERR)
- goto intr_old;
-
- gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
-
- if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
- gdl &= MOXA_MUST_GDL_MASK;
- if (gdl >= recv_room) {
- if (!port->ldisc_stop_rx)
- mxser_stoprx(tty);
- }
- while (gdl--) {
- ch = inb(port->ioaddr + UART_RX);
- tty_insert_flip_char(tty, ch, 0);
- cnt++;
- }
- goto end_intr;
- }
-intr_old:
-
- do {
- if (max-- < 0)
- break;
-
- ch = inb(port->ioaddr + UART_RX);
- if (port->board->chip_flag && (*status & UART_LSR_OE))
- outb(0x23, port->ioaddr + UART_FCR);
- *status &= port->read_status_mask;
- if (*status & port->ignore_status_mask) {
- if (++ignored > 100)
- break;
- } else {
- char flag = 0;
- if (*status & UART_LSR_SPECIAL) {
- if (*status & UART_LSR_BI) {
- flag = TTY_BREAK;
- port->icount.brk++;
-
- if (port->port.flags & ASYNC_SAK)
- do_SAK(tty);
- } else if (*status & UART_LSR_PE) {
- flag = TTY_PARITY;
- port->icount.parity++;
- } else if (*status & UART_LSR_FE) {
- flag = TTY_FRAME;
- port->icount.frame++;
- } else if (*status & UART_LSR_OE) {
- flag = TTY_OVERRUN;
- port->icount.overrun++;
- } else
- flag = TTY_BREAK;
- }
- tty_insert_flip_char(tty, ch, flag);
- cnt++;
- if (cnt >= recv_room) {
- if (!port->ldisc_stop_rx)
- mxser_stoprx(tty);
- break;
- }
-
- }
-
- if (port->board->chip_flag)
- break;
-
- *status = inb(port->ioaddr + UART_LSR);
- } while (*status & UART_LSR_DR);
-
-end_intr:
- mxvar_log.rxcnt[tty->index] += cnt;
- port->mon_data.rxcnt += cnt;
- port->mon_data.up_rxcnt += cnt;
-
- /*
- * We are called from an interrupt context with &port->slock
- * being held. Drop it temporarily in order to prevent
- * recursive locking.
- */
- spin_unlock(&port->slock);
- tty_flip_buffer_push(tty);
- spin_lock(&port->slock);
-}
-
-static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
-{
- int count, cnt;
-
- if (port->x_char) {
- outb(port->x_char, port->ioaddr + UART_TX);
- port->x_char = 0;
- mxvar_log.txcnt[tty->index]++;
- port->mon_data.txcnt++;
- port->mon_data.up_txcnt++;
- port->icount.tx++;
- return;
- }
-
- if (port->port.xmit_buf == NULL)
- return;
-
- if (port->xmit_cnt <= 0 || tty->stopped ||
- (tty->hw_stopped &&
- (port->type != PORT_16550A) &&
- (!port->board->chip_flag))) {
- port->IER &= ~UART_IER_THRI;
- outb(port->IER, port->ioaddr + UART_IER);
- return;
- }
-
- cnt = port->xmit_cnt;
- count = port->xmit_fifo_size;
- do {
- outb(port->port.xmit_buf[port->xmit_tail++],
- port->ioaddr + UART_TX);
- port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
- if (--port->xmit_cnt <= 0)
- break;
- } while (--count > 0);
- mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
-
- port->mon_data.txcnt += (cnt - port->xmit_cnt);
- port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
- port->icount.tx += (cnt - port->xmit_cnt);
-
- if (port->xmit_cnt < WAKEUP_CHARS)
- tty_wakeup(tty);
-
- if (port->xmit_cnt <= 0) {
- port->IER &= ~UART_IER_THRI;
- outb(port->IER, port->ioaddr + UART_IER);
- }
-}
-
-/*
- * This is the serial driver's generic interrupt routine
- */
-static irqreturn_t mxser_interrupt(int irq, void *dev_id)
-{
- int status, iir, i;
- struct mxser_board *brd = NULL;
- struct mxser_port *port;
- int max, irqbits, bits, msr;
- unsigned int int_cnt, pass_counter = 0;
- int handled = IRQ_NONE;
- struct tty_struct *tty;
-
- for (i = 0; i < MXSER_BOARDS; i++)
- if (dev_id == &mxser_boards[i]) {
- brd = dev_id;
- break;
- }
-
- if (i == MXSER_BOARDS)
- goto irq_stop;
- if (brd == NULL)
- goto irq_stop;
- max = brd->info->nports;
- while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
- irqbits = inb(brd->vector) & brd->vector_mask;
- if (irqbits == brd->vector_mask)
- break;
-
- handled = IRQ_HANDLED;
- for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
- if (irqbits == brd->vector_mask)
- break;
- if (bits & irqbits)
- continue;
- port = &brd->ports[i];
-
- int_cnt = 0;
- spin_lock(&port->slock);
- do {
- iir = inb(port->ioaddr + UART_IIR);
- if (iir & UART_IIR_NO_INT)
- break;
- iir &= MOXA_MUST_IIR_MASK;
- tty = tty_port_tty_get(&port->port);
- if (!tty ||
- (port->port.flags & ASYNC_CLOSING) ||
- !(port->port.flags &
- ASYNC_INITIALIZED)) {
- status = inb(port->ioaddr + UART_LSR);
- outb(0x27, port->ioaddr + UART_FCR);
- inb(port->ioaddr + UART_MSR);
- tty_kref_put(tty);
- break;
- }
-
- status = inb(port->ioaddr + UART_LSR);
-
- if (status & UART_LSR_PE)
- port->err_shadow |= NPPI_NOTIFY_PARITY;
- if (status & UART_LSR_FE)
- port->err_shadow |= NPPI_NOTIFY_FRAMING;
- if (status & UART_LSR_OE)
- port->err_shadow |=
- NPPI_NOTIFY_HW_OVERRUN;
- if (status & UART_LSR_BI)
- port->err_shadow |= NPPI_NOTIFY_BREAK;
-
- if (port->board->chip_flag) {
- if (iir == MOXA_MUST_IIR_GDA ||
- iir == MOXA_MUST_IIR_RDA ||
- iir == MOXA_MUST_IIR_RTO ||
- iir == MOXA_MUST_IIR_LSR)
- mxser_receive_chars(tty, port,
- &status);
-
- } else {
- status &= port->read_status_mask;
- if (status & UART_LSR_DR)
- mxser_receive_chars(tty, port,
- &status);
- }
- msr = inb(port->ioaddr + UART_MSR);
- if (msr & UART_MSR_ANY_DELTA)
- mxser_check_modem_status(tty, port, msr);
-
- if (port->board->chip_flag) {
- if (iir == 0x02 && (status &
- UART_LSR_THRE))
- mxser_transmit_chars(tty, port);
- } else {
- if (status & UART_LSR_THRE)
- mxser_transmit_chars(tty, port);
- }
- tty_kref_put(tty);
- } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
- spin_unlock(&port->slock);
- }
- }
-
-irq_stop:
- return handled;
-}
-
-static const struct tty_operations mxser_ops = {
- .open = mxser_open,
- .close = mxser_close,
- .write = mxser_write,
- .put_char = mxser_put_char,
- .flush_chars = mxser_flush_chars,
- .write_room = mxser_write_room,
- .chars_in_buffer = mxser_chars_in_buffer,
- .flush_buffer = mxser_flush_buffer,
- .ioctl = mxser_ioctl,
- .throttle = mxser_throttle,
- .unthrottle = mxser_unthrottle,
- .set_termios = mxser_set_termios,
- .stop = mxser_stop,
- .start = mxser_start,
- .hangup = mxser_hangup,
- .break_ctl = mxser_rs_break,
- .wait_until_sent = mxser_wait_until_sent,
- .tiocmget = mxser_tiocmget,
- .tiocmset = mxser_tiocmset,
- .get_icount = mxser_get_icount,
-};
-
-struct tty_port_operations mxser_port_ops = {
- .carrier_raised = mxser_carrier_raised,
- .dtr_rts = mxser_dtr_rts,
- .activate = mxser_activate,
- .shutdown = mxser_shutdown_port,
-};
-
-/*
- * The MOXA Smartio/Industio serial driver boot-time initialization code!
- */
-
-static void mxser_release_ISA_res(struct mxser_board *brd)
-{
- free_irq(brd->irq, brd);
- release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
- release_region(brd->vector, 1);
-}
-
-static int __devinit mxser_initbrd(struct mxser_board *brd,
- struct pci_dev *pdev)
-{
- struct mxser_port *info;
- unsigned int i;
- int retval;
-
- printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
- brd->ports[0].max_baud);
-
- for (i = 0; i < brd->info->nports; i++) {
- info = &brd->ports[i];
- tty_port_init(&info->port);
- info->port.ops = &mxser_port_ops;
- info->board = brd;
- info->stop_rx = 0;
- info->ldisc_stop_rx = 0;
-
- /* Enhance mode enabled here */
- if (brd->chip_flag != MOXA_OTHER_UART)
- mxser_enable_must_enchance_mode(info->ioaddr);
-
- info->port.flags = ASYNC_SHARE_IRQ;
- info->type = brd->uart_type;
-
- process_txrx_fifo(info);
-
- info->custom_divisor = info->baud_base * 16;
- info->port.close_delay = 5 * HZ / 10;
- info->port.closing_wait = 30 * HZ;
- info->normal_termios = mxvar_sdriver->init_termios;
- memset(&info->mon_data, 0, sizeof(struct mxser_mon));
- info->err_shadow = 0;
- spin_lock_init(&info->slock);
-
- /* before set INT ISR, disable all int */
- outb(inb(info->ioaddr + UART_IER) & 0xf0,
- info->ioaddr + UART_IER);
- }
-
- retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
- brd);
- if (retval)
- printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
- "conflict with another device.\n",
- brd->info->name, brd->irq);
-
- return retval;
-}
-
-static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
-{
- int id, i, bits;
- unsigned short regs[16], irq;
- unsigned char scratch, scratch2;
-
- brd->chip_flag = MOXA_OTHER_UART;
-
- id = mxser_read_register(cap, regs);
- switch (id) {
- case C168_ASIC_ID:
- brd->info = &mxser_cards[0];
- break;
- case C104_ASIC_ID:
- brd->info = &mxser_cards[1];
- break;
- case CI104J_ASIC_ID:
- brd->info = &mxser_cards[2];
- break;
- case C102_ASIC_ID:
- brd->info = &mxser_cards[5];
- break;
- case CI132_ASIC_ID:
- brd->info = &mxser_cards[6];
- break;
- case CI134_ASIC_ID:
- brd->info = &mxser_cards[7];
- break;
- default:
- return 0;
- }
-
- irq = 0;
- /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
- Flag-hack checks if configuration should be read as 2-port here. */
- if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
- irq = regs[9] & 0xF000;
- irq = irq | (irq >> 4);
- if (irq != (regs[9] & 0xFF00))
- goto err_irqconflict;
- } else if (brd->info->nports == 4) {
- irq = regs[9] & 0xF000;
- irq = irq | (irq >> 4);
- irq = irq | (irq >> 8);
- if (irq != regs[9])
- goto err_irqconflict;
- } else if (brd->info->nports == 8) {
- irq = regs[9] & 0xF000;
- irq = irq | (irq >> 4);
- irq = irq | (irq >> 8);
- if ((irq != regs[9]) || (irq != regs[10]))
- goto err_irqconflict;
- }
-
- if (!irq) {
- printk(KERN_ERR "mxser: interrupt number unset\n");
- return -EIO;
- }
- brd->irq = ((int)(irq & 0xF000) >> 12);
- for (i = 0; i < 8; i++)
- brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
- if ((regs[12] & 0x80) == 0) {
- printk(KERN_ERR "mxser: invalid interrupt vector\n");
- return -EIO;
- }
- brd->vector = (int)regs[11]; /* interrupt vector */
- if (id == 1)
- brd->vector_mask = 0x00FF;
- else
- brd->vector_mask = 0x000F;
- for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
- if (regs[12] & bits) {
- brd->ports[i].baud_base = 921600;
- brd->ports[i].max_baud = 921600;
- } else {
- brd->ports[i].baud_base = 115200;
- brd->ports[i].max_baud = 115200;
- }
- }
- scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
- outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
- outb(0, cap + UART_EFR); /* EFR is the same as FCR */
- outb(scratch2, cap + UART_LCR);
- outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
- scratch = inb(cap + UART_IIR);
-
- if (scratch & 0xC0)
- brd->uart_type = PORT_16550A;
- else
- brd->uart_type = PORT_16450;
- if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
- "mxser(IO)")) {
- printk(KERN_ERR "mxser: can't request ports I/O region: "
- "0x%.8lx-0x%.8lx\n",
- brd->ports[0].ioaddr, brd->ports[0].ioaddr +
- 8 * brd->info->nports - 1);
- return -EIO;
- }
- if (!request_region(brd->vector, 1, "mxser(vector)")) {
- release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
- printk(KERN_ERR "mxser: can't request interrupt vector region: "
- "0x%.8lx-0x%.8lx\n",
- brd->ports[0].ioaddr, brd->ports[0].ioaddr +
- 8 * brd->info->nports - 1);
- return -EIO;
- }
- return brd->info->nports;
-
-err_irqconflict:
- printk(KERN_ERR "mxser: invalid interrupt number\n");
- return -EIO;
-}
-
-static int __devinit mxser_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
-#ifdef CONFIG_PCI
- struct mxser_board *brd;
- unsigned int i, j;
- unsigned long ioaddress;
- int retval = -EINVAL;
-
- for (i = 0; i < MXSER_BOARDS; i++)
- if (mxser_boards[i].info == NULL)
- break;
-
- if (i >= MXSER_BOARDS) {
- dev_err(&pdev->dev, "too many boards found (maximum %d), board "
- "not configured\n", MXSER_BOARDS);
- goto err;
- }
-
- brd = &mxser_boards[i];
- brd->idx = i * MXSER_PORTS_PER_BOARD;
- dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
- mxser_cards[ent->driver_data].name,
- pdev->bus->number, PCI_SLOT(pdev->devfn));
-
- retval = pci_enable_device(pdev);
- if (retval) {
- dev_err(&pdev->dev, "PCI enable failed\n");
- goto err;
- }
-
- /* io address */
- ioaddress = pci_resource_start(pdev, 2);
- retval = pci_request_region(pdev, 2, "mxser(IO)");
- if (retval)
- goto err_dis;
-
- brd->info = &mxser_cards[ent->driver_data];
- for (i = 0; i < brd->info->nports; i++)
- brd->ports[i].ioaddr = ioaddress + 8 * i;
-
- /* vector */
- ioaddress = pci_resource_start(pdev, 3);
- retval = pci_request_region(pdev, 3, "mxser(vector)");
- if (retval)
- goto err_zero;
- brd->vector = ioaddress;
-
- /* irq */
- brd->irq = pdev->irq;
-
- brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
- brd->uart_type = PORT_16550A;
- brd->vector_mask = 0;
-
- for (i = 0; i < brd->info->nports; i++) {
- for (j = 0; j < UART_INFO_NUM; j++) {
- if (Gpci_uart_info[j].type == brd->chip_flag) {
- brd->ports[i].max_baud =
- Gpci_uart_info[j].max_baud;
-
- /* exception....CP-102 */
- if (brd->info->flags & MXSER_HIGHBAUD)
- brd->ports[i].max_baud = 921600;
- break;
- }
- }
- }
-
- if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
- for (i = 0; i < brd->info->nports; i++) {
- if (i < 4)
- brd->ports[i].opmode_ioaddr = ioaddress + 4;
- else
- brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
- }
- outb(0, ioaddress + 4); /* default set to RS232 mode */
- outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
- }
-
- for (i = 0; i < brd->info->nports; i++) {
- brd->vector_mask |= (1 << i);
- brd->ports[i].baud_base = 921600;
- }
-
- /* mxser_initbrd will hook ISR. */
- retval = mxser_initbrd(brd, pdev);
- if (retval)
- goto err_rel3;
-
- for (i = 0; i < brd->info->nports; i++)
- tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
-
- pci_set_drvdata(pdev, brd);
-
- return 0;
-err_rel3:
- pci_release_region(pdev, 3);
-err_zero:
- brd->info = NULL;
- pci_release_region(pdev, 2);
-err_dis:
- pci_disable_device(pdev);
-err:
- return retval;
-#else
- return -ENODEV;
-#endif
-}
-
-static void __devexit mxser_remove(struct pci_dev *pdev)
-{
-#ifdef CONFIG_PCI
- struct mxser_board *brd = pci_get_drvdata(pdev);
- unsigned int i;
-
- for (i = 0; i < brd->info->nports; i++)
- tty_unregister_device(mxvar_sdriver, brd->idx + i);
-
- free_irq(pdev->irq, brd);
- pci_release_region(pdev, 2);
- pci_release_region(pdev, 3);
- pci_disable_device(pdev);
- brd->info = NULL;
-#endif
-}
-
-static struct pci_driver mxser_driver = {
- .name = "mxser",
- .id_table = mxser_pcibrds,
- .probe = mxser_probe,
- .remove = __devexit_p(mxser_remove)
-};
-
-static int __init mxser_module_init(void)
-{
- struct mxser_board *brd;
- unsigned int b, i, m;
- int retval;
-
- mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
- if (!mxvar_sdriver)
- return -ENOMEM;
-
- printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
- MXSER_VERSION);
-
- /* Initialize the tty_driver structure */
- mxvar_sdriver->owner = THIS_MODULE;
- mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
- mxvar_sdriver->name = "ttyMI";
- mxvar_sdriver->major = ttymajor;
- mxvar_sdriver->minor_start = 0;
- mxvar_sdriver->num = MXSER_PORTS + 1;
- mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
- mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
- mxvar_sdriver->init_termios = tty_std_termios;
- mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
- mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
- tty_set_operations(mxvar_sdriver, &mxser_ops);
-
- retval = tty_register_driver(mxvar_sdriver);
- if (retval) {
- printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
- "tty driver !\n");
- goto err_put;
- }
-
- /* Start finding ISA boards here */
- for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
- if (!ioaddr[b])
- continue;
-
- brd = &mxser_boards[m];
- retval = mxser_get_ISA_conf(ioaddr[b], brd);
- if (retval <= 0) {
- brd->info = NULL;
- continue;
- }
-
- printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
- brd->info->name, ioaddr[b]);
-
- /* mxser_initbrd will hook ISR. */
- if (mxser_initbrd(brd, NULL) < 0) {
- brd->info = NULL;
- continue;
- }
-
- brd->idx = m * MXSER_PORTS_PER_BOARD;
- for (i = 0; i < brd->info->nports; i++)
- tty_register_device(mxvar_sdriver, brd->idx + i, NULL);
-
- m++;
- }
-
- retval = pci_register_driver(&mxser_driver);
- if (retval) {
- printk(KERN_ERR "mxser: can't register pci driver\n");
- if (!m) {
- retval = -ENODEV;
- goto err_unr;
- } /* else: we have some ISA cards under control */
- }
-
- return 0;
-err_unr:
- tty_unregister_driver(mxvar_sdriver);
-err_put:
- put_tty_driver(mxvar_sdriver);
- return retval;
-}
-
-static void __exit mxser_module_exit(void)
-{
- unsigned int i, j;
-
- pci_unregister_driver(&mxser_driver);
-
- for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
- if (mxser_boards[i].info != NULL)
- for (j = 0; j < mxser_boards[i].info->nports; j++)
- tty_unregister_device(mxvar_sdriver,
- mxser_boards[i].idx + j);
- tty_unregister_driver(mxvar_sdriver);
- put_tty_driver(mxvar_sdriver);
-
- for (i = 0; i < MXSER_BOARDS; i++)
- if (mxser_boards[i].info != NULL)
- mxser_release_ISA_res(&mxser_boards[i]);
-}
-
-module_init(mxser_module_init);
-module_exit(mxser_module_exit);
+++ /dev/null
-#ifndef _MXSER_H
-#define _MXSER_H
-
-/*
- * Semi-public control interfaces
- */
-
-/*
- * MOXA ioctls
- */
-
-#define MOXA 0x400
-#define MOXA_GETDATACOUNT (MOXA + 23)
-#define MOXA_DIAGNOSE (MOXA + 50)
-#define MOXA_CHKPORTENABLE (MOXA + 60)
-#define MOXA_HighSpeedOn (MOXA + 61)
-#define MOXA_GET_MAJOR (MOXA + 63)
-#define MOXA_GETMSTATUS (MOXA + 65)
-#define MOXA_SET_OP_MODE (MOXA + 66)
-#define MOXA_GET_OP_MODE (MOXA + 67)
-
-#define RS232_MODE 0
-#define RS485_2WIRE_MODE 1
-#define RS422_MODE 2
-#define RS485_4WIRE_MODE 3
-#define OP_MODE_MASK 3
-
-#define MOXA_SDS_RSTICOUNTER (MOXA + 69)
-#define MOXA_ASPP_OQUEUE (MOXA + 70)
-#define MOXA_ASPP_MON (MOXA + 73)
-#define MOXA_ASPP_LSTATUS (MOXA + 74)
-#define MOXA_ASPP_MON_EXT (MOXA + 75)
-#define MOXA_SET_BAUD_METHOD (MOXA + 76)
-
-/* --------------------------------------------------- */
-
-#define NPPI_NOTIFY_PARITY 0x01
-#define NPPI_NOTIFY_FRAMING 0x02
-#define NPPI_NOTIFY_HW_OVERRUN 0x04
-#define NPPI_NOTIFY_SW_OVERRUN 0x08
-#define NPPI_NOTIFY_BREAK 0x10
-
-#define NPPI_NOTIFY_CTSHOLD 0x01 /* Tx hold by CTS low */
-#define NPPI_NOTIFY_DSRHOLD 0x02 /* Tx hold by DSR low */
-#define NPPI_NOTIFY_XOFFHOLD 0x08 /* Tx hold by Xoff received */
-#define NPPI_NOTIFY_XOFFXENT 0x10 /* Xoff Sent */
-
-/* follow just for Moxa Must chip define. */
-/* */
-/* when LCR register (offset 0x03) write following value, */
-/* the Must chip will enter enchance mode. And write value */
-/* on EFR (offset 0x02) bit 6,7 to change bank. */
-#define MOXA_MUST_ENTER_ENCHANCE 0xBF
-
-/* when enhance mode enable, access on general bank register */
-#define MOXA_MUST_GDL_REGISTER 0x07
-#define MOXA_MUST_GDL_MASK 0x7F
-#define MOXA_MUST_GDL_HAS_BAD_DATA 0x80
-
-#define MOXA_MUST_LSR_RERR 0x80 /* error in receive FIFO */
-/* enchance register bank select and enchance mode setting register */
-/* when LCR register equal to 0xBF */
-#define MOXA_MUST_EFR_REGISTER 0x02
-/* enchance mode enable */
-#define MOXA_MUST_EFR_EFRB_ENABLE 0x10
-/* enchance reister bank set 0, 1, 2 */
-#define MOXA_MUST_EFR_BANK0 0x00
-#define MOXA_MUST_EFR_BANK1 0x40
-#define MOXA_MUST_EFR_BANK2 0x80
-#define MOXA_MUST_EFR_BANK3 0xC0
-#define MOXA_MUST_EFR_BANK_MASK 0xC0
-
-/* set XON1 value register, when LCR=0xBF and change to bank0 */
-#define MOXA_MUST_XON1_REGISTER 0x04
-
-/* set XON2 value register, when LCR=0xBF and change to bank0 */
-#define MOXA_MUST_XON2_REGISTER 0x05
-
-/* set XOFF1 value register, when LCR=0xBF and change to bank0 */
-#define MOXA_MUST_XOFF1_REGISTER 0x06
-
-/* set XOFF2 value register, when LCR=0xBF and change to bank0 */
-#define MOXA_MUST_XOFF2_REGISTER 0x07
-
-#define MOXA_MUST_RBRTL_REGISTER 0x04
-#define MOXA_MUST_RBRTH_REGISTER 0x05
-#define MOXA_MUST_RBRTI_REGISTER 0x06
-#define MOXA_MUST_THRTL_REGISTER 0x07
-#define MOXA_MUST_ENUM_REGISTER 0x04
-#define MOXA_MUST_HWID_REGISTER 0x05
-#define MOXA_MUST_ECR_REGISTER 0x06
-#define MOXA_MUST_CSR_REGISTER 0x07
-
-/* good data mode enable */
-#define MOXA_MUST_FCR_GDA_MODE_ENABLE 0x20
-/* only good data put into RxFIFO */
-#define MOXA_MUST_FCR_GDA_ONLY_ENABLE 0x10
-
-/* enable CTS interrupt */
-#define MOXA_MUST_IER_ECTSI 0x80
-/* enable RTS interrupt */
-#define MOXA_MUST_IER_ERTSI 0x40
-/* enable Xon/Xoff interrupt */
-#define MOXA_MUST_IER_XINT 0x20
-/* enable GDA interrupt */
-#define MOXA_MUST_IER_EGDAI 0x10
-
-#define MOXA_MUST_RECV_ISR (UART_IER_RDI | MOXA_MUST_IER_EGDAI)
-
-/* GDA interrupt pending */
-#define MOXA_MUST_IIR_GDA 0x1C
-#define MOXA_MUST_IIR_RDA 0x04
-#define MOXA_MUST_IIR_RTO 0x0C
-#define MOXA_MUST_IIR_LSR 0x06
-
-/* recieved Xon/Xoff or specical interrupt pending */
-#define MOXA_MUST_IIR_XSC 0x10
-
-/* RTS/CTS change state interrupt pending */
-#define MOXA_MUST_IIR_RTSCTS 0x20
-#define MOXA_MUST_IIR_MASK 0x3E
-
-#define MOXA_MUST_MCR_XON_FLAG 0x40
-#define MOXA_MUST_MCR_XON_ANY 0x80
-#define MOXA_MUST_MCR_TX_XON 0x08
-
-/* software flow control on chip mask value */
-#define MOXA_MUST_EFR_SF_MASK 0x0F
-/* send Xon1/Xoff1 */
-#define MOXA_MUST_EFR_SF_TX1 0x08
-/* send Xon2/Xoff2 */
-#define MOXA_MUST_EFR_SF_TX2 0x04
-/* send Xon1,Xon2/Xoff1,Xoff2 */
-#define MOXA_MUST_EFR_SF_TX12 0x0C
-/* don't send Xon/Xoff */
-#define MOXA_MUST_EFR_SF_TX_NO 0x00
-/* Tx software flow control mask */
-#define MOXA_MUST_EFR_SF_TX_MASK 0x0C
-/* don't receive Xon/Xoff */
-#define MOXA_MUST_EFR_SF_RX_NO 0x00
-/* receive Xon1/Xoff1 */
-#define MOXA_MUST_EFR_SF_RX1 0x02
-/* receive Xon2/Xoff2 */
-#define MOXA_MUST_EFR_SF_RX2 0x01
-/* receive Xon1,Xon2/Xoff1,Xoff2 */
-#define MOXA_MUST_EFR_SF_RX12 0x03
-/* Rx software flow control mask */
-#define MOXA_MUST_EFR_SF_RX_MASK 0x03
-
-#endif
+++ /dev/null
-/*
- * nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter
- *
- * Written by: Ulf Jakobsson,
- * Jan Åkerfeldt,
- * Stefan Thomasson,
- *
- * Maintained by: Paul Hardwick (p.hardwick@option.com)
- *
- * Patches:
- * Locking code changes for Vodafone by Sphere Systems Ltd,
- * Andrew Bird (ajb@spheresystems.co.uk )
- * & Phil Sanderson
- *
- * Source has been ported from an implementation made by Filip Aben @ Option
- *
- * --------------------------------------------------------------------------
- *
- * Copyright (c) 2005,2006 Option Wireless Sweden AB
- * Copyright (c) 2006 Sphere Systems Ltd
- * Copyright (c) 2006 Option Wireless n/v
- * All rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * --------------------------------------------------------------------------
- */
-
-/* Enable this to have a lot of debug printouts */
-#define DEBUG
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/ioport.h>
-#include <linux/tty.h>
-#include <linux/tty_driver.h>
-#include <linux/tty_flip.h>
-#include <linux/sched.h>
-#include <linux/serial.h>
-#include <linux/interrupt.h>
-#include <linux/kmod.h>
-#include <linux/init.h>
-#include <linux/kfifo.h>
-#include <linux/uaccess.h>
-#include <linux/slab.h>
-#include <asm/byteorder.h>
-
-#include <linux/delay.h>
-
-
-#define VERSION_STRING DRIVER_DESC " 2.1d (build date: " \
- __DATE__ " " __TIME__ ")"
-
-/* Macros definitions */
-
-/* Default debug printout level */
-#define NOZOMI_DEBUG_LEVEL 0x00
-
-#define P_BUF_SIZE 128
-#define NFO(_err_flag_, args...) \
-do { \
- char tmp[P_BUF_SIZE]; \
- snprintf(tmp, sizeof(tmp), ##args); \
- printk(_err_flag_ "[%d] %s(): %s\n", __LINE__, \
- __func__, tmp); \
-} while (0)
-
-#define DBG1(args...) D_(0x01, ##args)
-#define DBG2(args...) D_(0x02, ##args)
-#define DBG3(args...) D_(0x04, ##args)
-#define DBG4(args...) D_(0x08, ##args)
-#define DBG5(args...) D_(0x10, ##args)
-#define DBG6(args...) D_(0x20, ##args)
-#define DBG7(args...) D_(0x40, ##args)
-#define DBG8(args...) D_(0x80, ##args)
-
-#ifdef DEBUG
-/* Do we need this settable at runtime? */
-static int debug = NOZOMI_DEBUG_LEVEL;
-
-#define D(lvl, args...) do \
- {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \
- while (0)
-#define D_(lvl, args...) D(lvl, ##args)
-
-/* These printouts are always printed */
-
-#else
-static int debug;
-#define D_(lvl, args...)
-#endif
-
-/* TODO: rewrite to optimize macros... */
-
-#define TMP_BUF_MAX 256
-
-#define DUMP(buf__,len__) \
- do { \
- char tbuf[TMP_BUF_MAX] = {0};\
- if (len__ > 1) {\
- snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\
- if (tbuf[len__-2] == '\r') {\
- tbuf[len__-2] = 'r';\
- } \
- DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\
- } else {\
- DBG1("SENDING: '%s' (%d)", tbuf, len__);\
- } \
-} while (0)
-
-/* Defines */
-#define NOZOMI_NAME "nozomi"
-#define NOZOMI_NAME_TTY "nozomi_tty"
-#define DRIVER_DESC "Nozomi driver"
-
-#define NTTY_TTY_MAXMINORS 256
-#define NTTY_FIFO_BUFFER_SIZE 8192
-
-/* Must be power of 2 */
-#define FIFO_BUFFER_SIZE_UL 8192
-
-/* Size of tmp send buffer to card */
-#define SEND_BUF_MAX 1024
-#define RECEIVE_BUF_MAX 4
-
-
-#define R_IIR 0x0000 /* Interrupt Identity Register */
-#define R_FCR 0x0000 /* Flow Control Register */
-#define R_IER 0x0004 /* Interrupt Enable Register */
-
-#define CONFIG_MAGIC 0xEFEFFEFE
-#define TOGGLE_VALID 0x0000
-
-/* Definition of interrupt tokens */
-#define MDM_DL1 0x0001
-#define MDM_UL1 0x0002
-#define MDM_DL2 0x0004
-#define MDM_UL2 0x0008
-#define DIAG_DL1 0x0010
-#define DIAG_DL2 0x0020
-#define DIAG_UL 0x0040
-#define APP1_DL 0x0080
-#define APP1_UL 0x0100
-#define APP2_DL 0x0200
-#define APP2_UL 0x0400
-#define CTRL_DL 0x0800
-#define CTRL_UL 0x1000
-#define RESET 0x8000
-
-#define MDM_DL (MDM_DL1 | MDM_DL2)
-#define MDM_UL (MDM_UL1 | MDM_UL2)
-#define DIAG_DL (DIAG_DL1 | DIAG_DL2)
-
-/* modem signal definition */
-#define CTRL_DSR 0x0001
-#define CTRL_DCD 0x0002
-#define CTRL_RI 0x0004
-#define CTRL_CTS 0x0008
-
-#define CTRL_DTR 0x0001
-#define CTRL_RTS 0x0002
-
-#define MAX_PORT 4
-#define NOZOMI_MAX_PORTS 5
-#define NOZOMI_MAX_CARDS (NTTY_TTY_MAXMINORS / MAX_PORT)
-
-/* Type definitions */
-
-/*
- * There are two types of nozomi cards,
- * one with 2048 memory and with 8192 memory
- */
-enum card_type {
- F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */
- F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */
-};
-
-/* Initialization states a card can be in */
-enum card_state {
- NOZOMI_STATE_UKNOWN = 0,
- NOZOMI_STATE_ENABLED = 1, /* pci device enabled */
- NOZOMI_STATE_ALLOCATED = 2, /* config setup done */
- NOZOMI_STATE_READY = 3, /* flowcontrols received */
-};
-
-/* Two different toggle channels exist */
-enum channel_type {
- CH_A = 0,
- CH_B = 1,
-};
-
-/* Port definition for the card regarding flow control */
-enum ctrl_port_type {
- CTRL_CMD = 0,
- CTRL_MDM = 1,
- CTRL_DIAG = 2,
- CTRL_APP1 = 3,
- CTRL_APP2 = 4,
- CTRL_ERROR = -1,
-};
-
-/* Ports that the nozomi has */
-enum port_type {
- PORT_MDM = 0,
- PORT_DIAG = 1,
- PORT_APP1 = 2,
- PORT_APP2 = 3,
- PORT_CTRL = 4,
- PORT_ERROR = -1,
-};
-
-#ifdef __BIG_ENDIAN
-/* Big endian */
-
-struct toggles {
- unsigned int enabled:5; /*
- * Toggle fields are valid if enabled is 0,
- * else A-channels must always be used.
- */
- unsigned int diag_dl:1;
- unsigned int mdm_dl:1;
- unsigned int mdm_ul:1;
-} __attribute__ ((packed));
-
-/* Configuration table to read at startup of card */
-/* Is for now only needed during initialization phase */
-struct config_table {
- u32 signature;
- u16 product_information;
- u16 version;
- u8 pad3[3];
- struct toggles toggle;
- u8 pad1[4];
- u16 dl_mdm_len1; /*
- * If this is 64, it can hold
- * 60 bytes + 4 that is length field
- */
- u16 dl_start;
-
- u16 dl_diag_len1;
- u16 dl_mdm_len2; /*
- * If this is 64, it can hold
- * 60 bytes + 4 that is length field
- */
- u16 dl_app1_len;
-
- u16 dl_diag_len2;
- u16 dl_ctrl_len;
- u16 dl_app2_len;
- u8 pad2[16];
- u16 ul_mdm_len1;
- u16 ul_start;
- u16 ul_diag_len;
- u16 ul_mdm_len2;
- u16 ul_app1_len;
- u16 ul_app2_len;
- u16 ul_ctrl_len;
-} __attribute__ ((packed));
-
-/* This stores all control downlink flags */
-struct ctrl_dl {
- u8 port;
- unsigned int reserved:4;
- unsigned int CTS:1;
- unsigned int RI:1;
- unsigned int DCD:1;
- unsigned int DSR:1;
-} __attribute__ ((packed));
-
-/* This stores all control uplink flags */
-struct ctrl_ul {
- u8 port;
- unsigned int reserved:6;
- unsigned int RTS:1;
- unsigned int DTR:1;
-} __attribute__ ((packed));
-
-#else
-/* Little endian */
-
-/* This represents the toggle information */
-struct toggles {
- unsigned int mdm_ul:1;
- unsigned int mdm_dl:1;
- unsigned int diag_dl:1;
- unsigned int enabled:5; /*
- * Toggle fields are valid if enabled is 0,
- * else A-channels must always be used.
- */
-} __attribute__ ((packed));
-
-/* Configuration table to read at startup of card */
-struct config_table {
- u32 signature;
- u16 version;
- u16 product_information;
- struct toggles toggle;
- u8 pad1[7];
- u16 dl_start;
- u16 dl_mdm_len1; /*
- * If this is 64, it can hold
- * 60 bytes + 4 that is length field
- */
- u16 dl_mdm_len2;
- u16 dl_diag_len1;
- u16 dl_diag_len2;
- u16 dl_app1_len;
- u16 dl_app2_len;
- u16 dl_ctrl_len;
- u8 pad2[16];
- u16 ul_start;
- u16 ul_mdm_len2;
- u16 ul_mdm_len1;
- u16 ul_diag_len;
- u16 ul_app1_len;
- u16 ul_app2_len;
- u16 ul_ctrl_len;
-} __attribute__ ((packed));
-
-/* This stores all control downlink flags */
-struct ctrl_dl {
- unsigned int DSR:1;
- unsigned int DCD:1;
- unsigned int RI:1;
- unsigned int CTS:1;
- unsigned int reserverd:4;
- u8 port;
-} __attribute__ ((packed));
-
-/* This stores all control uplink flags */
-struct ctrl_ul {
- unsigned int DTR:1;
- unsigned int RTS:1;
- unsigned int reserved:6;
- u8 port;
-} __attribute__ ((packed));
-#endif
-
-/* This holds all information that is needed regarding a port */
-struct port {
- struct tty_port port;
- u8 update_flow_control;
- struct ctrl_ul ctrl_ul;
- struct ctrl_dl ctrl_dl;
- struct kfifo fifo_ul;
- void __iomem *dl_addr[2];
- u32 dl_size[2];
- u8 toggle_dl;
- void __iomem *ul_addr[2];
- u32 ul_size[2];
- u8 toggle_ul;
- u16 token_dl;
-
- /* mutex to ensure one access patch to this port */
- struct mutex tty_sem;
- wait_queue_head_t tty_wait;
- struct async_icount tty_icount;
-
- struct nozomi *dc;
-};
-
-/* Private data one for each card in the system */
-struct nozomi {
- void __iomem *base_addr;
- unsigned long flip;
-
- /* Pointers to registers */
- void __iomem *reg_iir;
- void __iomem *reg_fcr;
- void __iomem *reg_ier;
-
- u16 last_ier;
- enum card_type card_type;
- struct config_table config_table; /* Configuration table */
- struct pci_dev *pdev;
- struct port port[NOZOMI_MAX_PORTS];
- u8 *send_buf;
-
- spinlock_t spin_mutex; /* secures access to registers and tty */
-
- unsigned int index_start;
- enum card_state state;
- u32 open_ttys;
-};
-
-/* This is a data packet that is read or written to/from card */
-struct buffer {
- u32 size; /* size is the length of the data buffer */
- u8 *data;
-} __attribute__ ((packed));
-
-/* Global variables */
-static const struct pci_device_id nozomi_pci_tbl[] __devinitconst = {
- {PCI_DEVICE(0x1931, 0x000c)}, /* Nozomi HSDPA */
- {},
-};
-
-MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl);
-
-static struct nozomi *ndevs[NOZOMI_MAX_CARDS];
-static struct tty_driver *ntty_driver;
-
-static const struct tty_port_operations noz_tty_port_ops;
-
-/*
- * find card by tty_index
- */
-static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty)
-{
- return tty ? ndevs[tty->index / MAX_PORT] : NULL;
-}
-
-static inline struct port *get_port_by_tty(const struct tty_struct *tty)
-{
- struct nozomi *ndev = get_dc_by_tty(tty);
- return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL;
-}
-
-/*
- * TODO:
- * -Optimize
- * -Rewrite cleaner
- */
-
-static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
- u32 size_bytes)
-{
- u32 i = 0;
- const u32 __iomem *ptr = mem_addr_start;
- u16 *buf16;
-
- if (unlikely(!ptr || !buf))
- goto out;
-
- /* shortcut for extremely often used cases */
- switch (size_bytes) {
- case 2: /* 2 bytes */
- buf16 = (u16 *) buf;
- *buf16 = __le16_to_cpu(readw(ptr));
- goto out;
- break;
- case 4: /* 4 bytes */
- *(buf) = __le32_to_cpu(readl(ptr));
- goto out;
- break;
- }
-
- while (i < size_bytes) {
- if (size_bytes - i == 2) {
- /* Handle 2 bytes in the end */
- buf16 = (u16 *) buf;
- *(buf16) = __le16_to_cpu(readw(ptr));
- i += 2;
- } else {
- /* Read 4 bytes */
- *(buf) = __le32_to_cpu(readl(ptr));
- i += 4;
- }
- buf++;
- ptr++;
- }
-out:
- return;
-}
-
-/*
- * TODO:
- * -Optimize
- * -Rewrite cleaner
- */
-static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
- u32 size_bytes)
-{
- u32 i = 0;
- u32 __iomem *ptr = mem_addr_start;
- const u16 *buf16;
-
- if (unlikely(!ptr || !buf))
- return 0;
-
- /* shortcut for extremely often used cases */
- switch (size_bytes) {
- case 2: /* 2 bytes */
- buf16 = (const u16 *)buf;
- writew(__cpu_to_le16(*buf16), ptr);
- return 2;
- break;
- case 1: /*
- * also needs to write 4 bytes in this case
- * so falling through..
- */
- case 4: /* 4 bytes */
- writel(__cpu_to_le32(*buf), ptr);
- return 4;
- break;
- }
-
- while (i < size_bytes) {
- if (size_bytes - i == 2) {
- /* 2 bytes */
- buf16 = (const u16 *)buf;
- writew(__cpu_to_le16(*buf16), ptr);
- i += 2;
- } else {
- /* 4 bytes */
- writel(__cpu_to_le32(*buf), ptr);
- i += 4;
- }
- buf++;
- ptr++;
- }
- return i;
-}
-
-/* Setup pointers to different channels and also setup buffer sizes. */
-static void setup_memory(struct nozomi *dc)
-{
- void __iomem *offset = dc->base_addr + dc->config_table.dl_start;
- /* The length reported is including the length field of 4 bytes,
- * hence subtract with 4.
- */
- const u16 buff_offset = 4;
-
- /* Modem port dl configuration */
- dc->port[PORT_MDM].dl_addr[CH_A] = offset;
- dc->port[PORT_MDM].dl_addr[CH_B] =
- (offset += dc->config_table.dl_mdm_len1);
- dc->port[PORT_MDM].dl_size[CH_A] =
- dc->config_table.dl_mdm_len1 - buff_offset;
- dc->port[PORT_MDM].dl_size[CH_B] =
- dc->config_table.dl_mdm_len2 - buff_offset;
-
- /* Diag port dl configuration */
- dc->port[PORT_DIAG].dl_addr[CH_A] =
- (offset += dc->config_table.dl_mdm_len2);
- dc->port[PORT_DIAG].dl_size[CH_A] =
- dc->config_table.dl_diag_len1 - buff_offset;
- dc->port[PORT_DIAG].dl_addr[CH_B] =
- (offset += dc->config_table.dl_diag_len1);
- dc->port[PORT_DIAG].dl_size[CH_B] =
- dc->config_table.dl_diag_len2 - buff_offset;
-
- /* App1 port dl configuration */
- dc->port[PORT_APP1].dl_addr[CH_A] =
- (offset += dc->config_table.dl_diag_len2);
- dc->port[PORT_APP1].dl_size[CH_A] =
- dc->config_table.dl_app1_len - buff_offset;
-
- /* App2 port dl configuration */
- dc->port[PORT_APP2].dl_addr[CH_A] =
- (offset += dc->config_table.dl_app1_len);
- dc->port[PORT_APP2].dl_size[CH_A] =
- dc->config_table.dl_app2_len - buff_offset;
-
- /* Ctrl dl configuration */
- dc->port[PORT_CTRL].dl_addr[CH_A] =
- (offset += dc->config_table.dl_app2_len);
- dc->port[PORT_CTRL].dl_size[CH_A] =
- dc->config_table.dl_ctrl_len - buff_offset;
-
- offset = dc->base_addr + dc->config_table.ul_start;
-
- /* Modem Port ul configuration */
- dc->port[PORT_MDM].ul_addr[CH_A] = offset;
- dc->port[PORT_MDM].ul_size[CH_A] =
- dc->config_table.ul_mdm_len1 - buff_offset;
- dc->port[PORT_MDM].ul_addr[CH_B] =
- (offset += dc->config_table.ul_mdm_len1);
- dc->port[PORT_MDM].ul_size[CH_B] =
- dc->config_table.ul_mdm_len2 - buff_offset;
-
- /* Diag port ul configuration */
- dc->port[PORT_DIAG].ul_addr[CH_A] =
- (offset += dc->config_table.ul_mdm_len2);
- dc->port[PORT_DIAG].ul_size[CH_A] =
- dc->config_table.ul_diag_len - buff_offset;
-
- /* App1 port ul configuration */
- dc->port[PORT_APP1].ul_addr[CH_A] =
- (offset += dc->config_table.ul_diag_len);
- dc->port[PORT_APP1].ul_size[CH_A] =
- dc->config_table.ul_app1_len - buff_offset;
-
- /* App2 port ul configuration */
- dc->port[PORT_APP2].ul_addr[CH_A] =
- (offset += dc->config_table.ul_app1_len);
- dc->port[PORT_APP2].ul_size[CH_A] =
- dc->config_table.ul_app2_len - buff_offset;
-
- /* Ctrl ul configuration */
- dc->port[PORT_CTRL].ul_addr[CH_A] =
- (offset += dc->config_table.ul_app2_len);
- dc->port[PORT_CTRL].ul_size[CH_A] =
- dc->config_table.ul_ctrl_len - buff_offset;
-}
-
-/* Dump config table under initalization phase */
-#ifdef DEBUG
-static void dump_table(const struct nozomi *dc)
-{
- DBG3("signature: 0x%08X", dc->config_table.signature);
- DBG3("version: 0x%04X", dc->config_table.version);
- DBG3("product_information: 0x%04X", \
- dc->config_table.product_information);
- DBG3("toggle enabled: %d", dc->config_table.toggle.enabled);
- DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul);
- DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl);
- DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl);
-
- DBG3("dl_start: 0x%04X", dc->config_table.dl_start);
- DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1,
- dc->config_table.dl_mdm_len1);
- DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2,
- dc->config_table.dl_mdm_len2);
- DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1,
- dc->config_table.dl_diag_len1);
- DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2,
- dc->config_table.dl_diag_len2);
- DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len,
- dc->config_table.dl_app1_len);
- DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len,
- dc->config_table.dl_app2_len);
- DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len,
- dc->config_table.dl_ctrl_len);
- DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start,
- dc->config_table.ul_start);
- DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1,
- dc->config_table.ul_mdm_len1);
- DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2,
- dc->config_table.ul_mdm_len2);
- DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len,
- dc->config_table.ul_diag_len);
- DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len,
- dc->config_table.ul_app1_len);
- DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len,
- dc->config_table.ul_app2_len);
- DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len,
- dc->config_table.ul_ctrl_len);
-}
-#else
-static inline void dump_table(const struct nozomi *dc) { }
-#endif
-
-/*
- * Read configuration table from card under intalization phase
- * Returns 1 if ok, else 0
- */
-static int nozomi_read_config_table(struct nozomi *dc)
-{
- read_mem32((u32 *) &dc->config_table, dc->base_addr + 0,
- sizeof(struct config_table));
-
- if (dc->config_table.signature != CONFIG_MAGIC) {
- dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n",
- dc->config_table.signature, CONFIG_MAGIC);
- return 0;
- }
-
- if ((dc->config_table.version == 0)
- || (dc->config_table.toggle.enabled == TOGGLE_VALID)) {
- int i;
- DBG1("Second phase, configuring card");
-
- setup_memory(dc);
-
- dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul;
- dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl;
- dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl;
- DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d",
- dc->port[PORT_MDM].toggle_ul,
- dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl);
-
- dump_table(dc);
-
- for (i = PORT_MDM; i < MAX_PORT; i++) {
- memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
- memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
- }
-
- /* Enable control channel */
- dc->last_ier = dc->last_ier | CTRL_DL;
- writew(dc->last_ier, dc->reg_ier);
-
- dc->state = NOZOMI_STATE_ALLOCATED;
- dev_info(&dc->pdev->dev, "Initialization OK!\n");
- return 1;
- }
-
- if ((dc->config_table.version > 0)
- && (dc->config_table.toggle.enabled != TOGGLE_VALID)) {
- u32 offset = 0;
- DBG1("First phase: pushing upload buffers, clearing download");
-
- dev_info(&dc->pdev->dev, "Version of card: %d\n",
- dc->config_table.version);
-
- /* Here we should disable all I/O over F32. */
- setup_memory(dc);
-
- /*
- * We should send ALL channel pair tokens back along
- * with reset token
- */
-
- /* push upload modem buffers */
- write_mem32(dc->port[PORT_MDM].ul_addr[CH_A],
- (u32 *) &offset, 4);
- write_mem32(dc->port[PORT_MDM].ul_addr[CH_B],
- (u32 *) &offset, 4);
-
- writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr);
-
- DBG1("First phase done");
- }
-
- return 1;
-}
-
-/* Enable uplink interrupts */
-static void enable_transmit_ul(enum port_type port, struct nozomi *dc)
-{
- static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL};
-
- if (port < NOZOMI_MAX_PORTS) {
- dc->last_ier |= mask[port];
- writew(dc->last_ier, dc->reg_ier);
- } else {
- dev_err(&dc->pdev->dev, "Called with wrong port?\n");
- }
-}
-
-/* Disable uplink interrupts */
-static void disable_transmit_ul(enum port_type port, struct nozomi *dc)
-{
- static const u16 mask[] =
- {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL};
-
- if (port < NOZOMI_MAX_PORTS) {
- dc->last_ier &= mask[port];
- writew(dc->last_ier, dc->reg_ier);
- } else {
- dev_err(&dc->pdev->dev, "Called with wrong port?\n");
- }
-}
-
-/* Enable downlink interrupts */
-static void enable_transmit_dl(enum port_type port, struct nozomi *dc)
-{
- static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL};
-
- if (port < NOZOMI_MAX_PORTS) {
- dc->last_ier |= mask[port];
- writew(dc->last_ier, dc->reg_ier);
- } else {
- dev_err(&dc->pdev->dev, "Called with wrong port?\n");
- }
-}
-
-/* Disable downlink interrupts */
-static void disable_transmit_dl(enum port_type port, struct nozomi *dc)
-{
- static const u16 mask[] =
- {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL};
-
- if (port < NOZOMI_MAX_PORTS) {
- dc->last_ier &= mask[port];
- writew(dc->last_ier, dc->reg_ier);
- } else {
- dev_err(&dc->pdev->dev, "Called with wrong port?\n");
- }
-}
-
-/*
- * Return 1 - send buffer to card and ack.
- * Return 0 - don't ack, don't send buffer to card.
- */
-static int send_data(enum port_type index, struct nozomi *dc)
-{
- u32 size = 0;
- struct port *port = &dc->port[index];
- const u8 toggle = port->toggle_ul;
- void __iomem *addr = port->ul_addr[toggle];
- const u32 ul_size = port->ul_size[toggle];
- struct tty_struct *tty = tty_port_tty_get(&port->port);
-
- /* Get data from tty and place in buf for now */
- size = kfifo_out(&port->fifo_ul, dc->send_buf,
- ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX);
-
- if (size == 0) {
- DBG4("No more data to send, disable link:");
- tty_kref_put(tty);
- return 0;
- }
-
- /* DUMP(buf, size); */
-
- /* Write length + data */
- write_mem32(addr, (u32 *) &size, 4);
- write_mem32(addr + 4, (u32 *) dc->send_buf, size);
-
- if (tty)
- tty_wakeup(tty);
-
- tty_kref_put(tty);
- return 1;
-}
-
-/* If all data has been read, return 1, else 0 */
-static int receive_data(enum port_type index, struct nozomi *dc)
-{
- u8 buf[RECEIVE_BUF_MAX] = { 0 };
- int size;
- u32 offset = 4;
- struct port *port = &dc->port[index];
- void __iomem *addr = port->dl_addr[port->toggle_dl];
- struct tty_struct *tty = tty_port_tty_get(&port->port);
- int i, ret;
-
- if (unlikely(!tty)) {
- DBG1("tty not open for port: %d?", index);
- return 1;
- }
-
- read_mem32((u32 *) &size, addr, 4);
- /* DBG1( "%d bytes port: %d", size, index); */
-
- if (test_bit(TTY_THROTTLED, &tty->flags)) {
- DBG1("No room in tty, don't read data, don't ack interrupt, "
- "disable interrupt");
-
- /* disable interrupt in downlink... */
- disable_transmit_dl(index, dc);
- ret = 0;
- goto put;
- }
-
- if (unlikely(size == 0)) {
- dev_err(&dc->pdev->dev, "size == 0?\n");
- ret = 1;
- goto put;
- }
-
- while (size > 0) {
- read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
-
- if (size == 1) {
- tty_insert_flip_char(tty, buf[0], TTY_NORMAL);
- size = 0;
- } else if (size < RECEIVE_BUF_MAX) {
- size -= tty_insert_flip_string(tty, (char *) buf, size);
- } else {
- i = tty_insert_flip_string(tty, \
- (char *) buf, RECEIVE_BUF_MAX);
- size -= i;
- offset += i;
- }
- }
-
- set_bit(index, &dc->flip);
- ret = 1;
-put:
- tty_kref_put(tty);
- return ret;
-}
-
-/* Debug for interrupts */
-#ifdef DEBUG
-static char *interrupt2str(u16 interrupt)
-{
- static char buf[TMP_BUF_MAX];
- char *p = buf;
-
- interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
- interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "MDM_DL2 ") : NULL;
-
- interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "MDM_UL1 ") : NULL;
- interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "MDM_UL2 ") : NULL;
-
- interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "DIAG_DL1 ") : NULL;
- interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "DIAG_DL2 ") : NULL;
-
- interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "DIAG_UL ") : NULL;
-
- interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "APP1_DL ") : NULL;
- interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "APP2_DL ") : NULL;
-
- interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "APP1_UL ") : NULL;
- interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "APP2_UL ") : NULL;
-
- interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "CTRL_DL ") : NULL;
- interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "CTRL_UL ") : NULL;
-
- interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
- "RESET ") : NULL;
-
- return buf;
-}
-#endif
-
-/*
- * Receive flow control
- * Return 1 - If ok, else 0
- */
-static int receive_flow_control(struct nozomi *dc)
-{
- enum port_type port = PORT_MDM;
- struct ctrl_dl ctrl_dl;
- struct ctrl_dl old_ctrl;
- u16 enable_ier = 0;
-
- read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
-
- switch (ctrl_dl.port) {
- case CTRL_CMD:
- DBG1("The Base Band sends this value as a response to a "
- "request for IMSI detach sent over the control "
- "channel uplink (see section 7.6.1).");
- break;
- case CTRL_MDM:
- port = PORT_MDM;
- enable_ier = MDM_DL;
- break;
- case CTRL_DIAG:
- port = PORT_DIAG;
- enable_ier = DIAG_DL;
- break;
- case CTRL_APP1:
- port = PORT_APP1;
- enable_ier = APP1_DL;
- break;
- case CTRL_APP2:
- port = PORT_APP2;
- enable_ier = APP2_DL;
- if (dc->state == NOZOMI_STATE_ALLOCATED) {
- /*
- * After card initialization the flow control
- * received for APP2 is always the last
- */
- dc->state = NOZOMI_STATE_READY;
- dev_info(&dc->pdev->dev, "Device READY!\n");
- }
- break;
- default:
- dev_err(&dc->pdev->dev,
- "ERROR: flow control received for non-existing port\n");
- return 0;
- };
-
- DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
- *((u16 *)&ctrl_dl));
-
- old_ctrl = dc->port[port].ctrl_dl;
- dc->port[port].ctrl_dl = ctrl_dl;
-
- if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
- DBG1("Disable interrupt (0x%04X) on port: %d",
- enable_ier, port);
- disable_transmit_ul(port, dc);
-
- } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
-
- if (kfifo_len(&dc->port[port].fifo_ul)) {
- DBG1("Enable interrupt (0x%04X) on port: %d",
- enable_ier, port);
- DBG1("Data in buffer [%d], enable transmit! ",
- kfifo_len(&dc->port[port].fifo_ul));
- enable_transmit_ul(port, dc);
- } else {
- DBG1("No data in buffer...");
- }
- }
-
- if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
- DBG1(" No change in mctrl");
- return 1;
- }
- /* Update statistics */
- if (old_ctrl.CTS != ctrl_dl.CTS)
- dc->port[port].tty_icount.cts++;
- if (old_ctrl.DSR != ctrl_dl.DSR)
- dc->port[port].tty_icount.dsr++;
- if (old_ctrl.RI != ctrl_dl.RI)
- dc->port[port].tty_icount.rng++;
- if (old_ctrl.DCD != ctrl_dl.DCD)
- dc->port[port].tty_icount.dcd++;
-
- wake_up_interruptible(&dc->port[port].tty_wait);
-
- DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
- port,
- dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
- dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
-
- return 1;
-}
-
-static enum ctrl_port_type port2ctrl(enum port_type port,
- const struct nozomi *dc)
-{
- switch (port) {
- case PORT_MDM:
- return CTRL_MDM;
- case PORT_DIAG:
- return CTRL_DIAG;
- case PORT_APP1:
- return CTRL_APP1;
- case PORT_APP2:
- return CTRL_APP2;
- default:
- dev_err(&dc->pdev->dev,
- "ERROR: send flow control " \
- "received for non-existing port\n");
- };
- return CTRL_ERROR;
-}
-
-/*
- * Send flow control, can only update one channel at a time
- * Return 0 - If we have updated all flow control
- * Return 1 - If we need to update more flow control, ack current enable more
- */
-static int send_flow_control(struct nozomi *dc)
-{
- u32 i, more_flow_control_to_be_updated = 0;
- u16 *ctrl;
-
- for (i = PORT_MDM; i < MAX_PORT; i++) {
- if (dc->port[i].update_flow_control) {
- if (more_flow_control_to_be_updated) {
- /* We have more flow control to be updated */
- return 1;
- }
- dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
- ctrl = (u16 *)&dc->port[i].ctrl_ul;
- write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
- (u32 *) ctrl, 2);
- dc->port[i].update_flow_control = 0;
- more_flow_control_to_be_updated = 1;
- }
- }
- return 0;
-}
-
-/*
- * Handle downlink data, ports that are handled are modem and diagnostics
- * Return 1 - ok
- * Return 0 - toggle fields are out of sync
- */
-static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle,
- u16 read_iir, u16 mask1, u16 mask2)
-{
- if (*toggle == 0 && read_iir & mask1) {
- if (receive_data(port, dc)) {
- writew(mask1, dc->reg_fcr);
- *toggle = !(*toggle);
- }
-
- if (read_iir & mask2) {
- if (receive_data(port, dc)) {
- writew(mask2, dc->reg_fcr);
- *toggle = !(*toggle);
- }
- }
- } else if (*toggle == 1 && read_iir & mask2) {
- if (receive_data(port, dc)) {
- writew(mask2, dc->reg_fcr);
- *toggle = !(*toggle);
- }
-
- if (read_iir & mask1) {
- if (receive_data(port, dc)) {
- writew(mask1, dc->reg_fcr);
- *toggle = !(*toggle);
- }
- }
- } else {
- dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
- *toggle);
- return 0;
- }
- return 1;
-}
-
-/*
- * Handle uplink data, this is currently for the modem port
- * Return 1 - ok
- * Return 0 - toggle field are out of sync
- */
-static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir)
-{
- u8 *toggle = &(dc->port[port].toggle_ul);
-
- if (*toggle == 0 && read_iir & MDM_UL1) {
- dc->last_ier &= ~MDM_UL;
- writew(dc->last_ier, dc->reg_ier);
- if (send_data(port, dc)) {
- writew(MDM_UL1, dc->reg_fcr);
- dc->last_ier = dc->last_ier | MDM_UL;
- writew(dc->last_ier, dc->reg_ier);
- *toggle = !*toggle;
- }
-
- if (read_iir & MDM_UL2) {
- dc->last_ier &= ~MDM_UL;
- writew(dc->last_ier, dc->reg_ier);
- if (send_data(port, dc)) {
- writew(MDM_UL2, dc->reg_fcr);
- dc->last_ier = dc->last_ier | MDM_UL;
- writew(dc->last_ier, dc->reg_ier);
- *toggle = !*toggle;
- }
- }
-
- } else if (*toggle == 1 && read_iir & MDM_UL2) {
- dc->last_ier &= ~MDM_UL;
- writew(dc->last_ier, dc->reg_ier);
- if (send_data(port, dc)) {
- writew(MDM_UL2, dc->reg_fcr);
- dc->last_ier = dc->last_ier | MDM_UL;
- writew(dc->last_ier, dc->reg_ier);
- *toggle = !*toggle;
- }
-
- if (read_iir & MDM_UL1) {
- dc->last_ier &= ~MDM_UL;
- writew(dc->last_ier, dc->reg_ier);
- if (send_data(port, dc)) {
- writew(MDM_UL1, dc->reg_fcr);
- dc->last_ier = dc->last_ier | MDM_UL;
- writew(dc->last_ier, dc->reg_ier);
- *toggle = !*toggle;
- }
- }
- } else {
- writew(read_iir & MDM_UL, dc->reg_fcr);
- dev_err(&dc->pdev->dev, "port out of sync!\n");
- return 0;
- }
- return 1;
-}
-
-static irqreturn_t interrupt_handler(int irq, void *dev_id)
-{
- struct nozomi *dc = dev_id;
- unsigned int a;
- u16 read_iir;
-
- if (!dc)
- return IRQ_NONE;
-
- spin_lock(&dc->spin_mutex);
- read_iir = readw(dc->reg_iir);
-
- /* Card removed */
- if (read_iir == (u16)-1)
- goto none;
- /*
- * Just handle interrupt enabled in IER
- * (by masking with dc->last_ier)
- */
- read_iir &= dc->last_ier;
-
- if (read_iir == 0)
- goto none;
-
-
- DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir,
- dc->last_ier);
-
- if (read_iir & RESET) {
- if (unlikely(!nozomi_read_config_table(dc))) {
- dc->last_ier = 0x0;
- writew(dc->last_ier, dc->reg_ier);
- dev_err(&dc->pdev->dev, "Could not read status from "
- "card, we should disable interface\n");
- } else {
- writew(RESET, dc->reg_fcr);
- }
- /* No more useful info if this was the reset interrupt. */
- goto exit_handler;
- }
- if (read_iir & CTRL_UL) {
- DBG1("CTRL_UL");
- dc->last_ier &= ~CTRL_UL;
- writew(dc->last_ier, dc->reg_ier);
- if (send_flow_control(dc)) {
- writew(CTRL_UL, dc->reg_fcr);
- dc->last_ier = dc->last_ier | CTRL_UL;
- writew(dc->last_ier, dc->reg_ier);
- }
- }
- if (read_iir & CTRL_DL) {
- receive_flow_control(dc);
- writew(CTRL_DL, dc->reg_fcr);
- }
- if (read_iir & MDM_DL) {
- if (!handle_data_dl(dc, PORT_MDM,
- &(dc->port[PORT_MDM].toggle_dl), read_iir,
- MDM_DL1, MDM_DL2)) {
- dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
- goto exit_handler;
- }
- }
- if (read_iir & MDM_UL) {
- if (!handle_data_ul(dc, PORT_MDM, read_iir)) {
- dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
- goto exit_handler;
- }
- }
- if (read_iir & DIAG_DL) {
- if (!handle_data_dl(dc, PORT_DIAG,
- &(dc->port[PORT_DIAG].toggle_dl), read_iir,
- DIAG_DL1, DIAG_DL2)) {
- dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
- goto exit_handler;
- }
- }
- if (read_iir & DIAG_UL) {
- dc->last_ier &= ~DIAG_UL;
- writew(dc->last_ier, dc->reg_ier);
- if (send_data(PORT_DIAG, dc)) {
- writew(DIAG_UL, dc->reg_fcr);
- dc->last_ier = dc->last_ier | DIAG_UL;
- writew(dc->last_ier, dc->reg_ier);
- }
- }
- if (read_iir & APP1_DL) {
- if (receive_data(PORT_APP1, dc))
- writew(APP1_DL, dc->reg_fcr);
- }
- if (read_iir & APP1_UL) {
- dc->last_ier &= ~APP1_UL;
- writew(dc->last_ier, dc->reg_ier);
- if (send_data(PORT_APP1, dc)) {
- writew(APP1_UL, dc->reg_fcr);
- dc->last_ier = dc->last_ier | APP1_UL;
- writew(dc->last_ier, dc->reg_ier);
- }
- }
- if (read_iir & APP2_DL) {
- if (receive_data(PORT_APP2, dc))
- writew(APP2_DL, dc->reg_fcr);
- }
- if (read_iir & APP2_UL) {
- dc->last_ier &= ~APP2_UL;
- writew(dc->last_ier, dc->reg_ier);
- if (send_data(PORT_APP2, dc)) {
- writew(APP2_UL, dc->reg_fcr);
- dc->last_ier = dc->last_ier | APP2_UL;
- writew(dc->last_ier, dc->reg_ier);
- }
- }
-
-exit_handler:
- spin_unlock(&dc->spin_mutex);
- for (a = 0; a < NOZOMI_MAX_PORTS; a++) {
- struct tty_struct *tty;
- if (test_and_clear_bit(a, &dc->flip)) {
- tty = tty_port_tty_get(&dc->port[a].port);
- if (tty)
- tty_flip_buffer_push(tty);
- tty_kref_put(tty);
- }
- }
- return IRQ_HANDLED;
-none:
- spin_unlock(&dc->spin_mutex);
- return IRQ_NONE;
-}
-
-static void nozomi_get_card_type(struct nozomi *dc)
-{
- int i;
- u32 size = 0;
-
- for (i = 0; i < 6; i++)
- size += pci_resource_len(dc->pdev, i);
-
- /* Assume card type F32_8 if no match */
- dc->card_type = size == 2048 ? F32_2 : F32_8;
-
- dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
-}
-
-static void nozomi_setup_private_data(struct nozomi *dc)
-{
- void __iomem *offset = dc->base_addr + dc->card_type / 2;
- unsigned int i;
-
- dc->reg_fcr = (void __iomem *)(offset + R_FCR);
- dc->reg_iir = (void __iomem *)(offset + R_IIR);
- dc->reg_ier = (void __iomem *)(offset + R_IER);
- dc->last_ier = 0;
- dc->flip = 0;
-
- dc->port[PORT_MDM].token_dl = MDM_DL;
- dc->port[PORT_DIAG].token_dl = DIAG_DL;
- dc->port[PORT_APP1].token_dl = APP1_DL;
- dc->port[PORT_APP2].token_dl = APP2_DL;
-
- for (i = 0; i < MAX_PORT; i++)
- init_waitqueue_head(&dc->port[i].tty_wait);
-}
-
-static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
-
- return sprintf(buf, "%d\n", dc->card_type);
-}
-static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL);
-
-static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
-
- return sprintf(buf, "%u\n", dc->open_ttys);
-}
-static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL);
-
-static void make_sysfs_files(struct nozomi *dc)
-{
- if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
- dev_err(&dc->pdev->dev,
- "Could not create sysfs file for card_type\n");
- if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
- dev_err(&dc->pdev->dev,
- "Could not create sysfs file for open_ttys\n");
-}
-
-static void remove_sysfs_files(struct nozomi *dc)
-{
- device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
- device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
-}
-
-/* Allocate memory for one device */
-static int __devinit nozomi_card_init(struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
- resource_size_t start;
- int ret;
- struct nozomi *dc = NULL;
- int ndev_idx;
- int i;
-
- dev_dbg(&pdev->dev, "Init, new card found\n");
-
- for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++)
- if (!ndevs[ndev_idx])
- break;
-
- if (ndev_idx >= ARRAY_SIZE(ndevs)) {
- dev_err(&pdev->dev, "no free tty range for this card left\n");
- ret = -EIO;
- goto err;
- }
-
- dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
- if (unlikely(!dc)) {
- dev_err(&pdev->dev, "Could not allocate memory\n");
- ret = -ENOMEM;
- goto err_free;
- }
-
- dc->pdev = pdev;
-
- ret = pci_enable_device(dc->pdev);
- if (ret) {
- dev_err(&pdev->dev, "Failed to enable PCI Device\n");
- goto err_free;
- }
-
- ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
- if (ret) {
- dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
- (int) /* nozomi_private.io_addr */ 0);
- goto err_disable_device;
- }
-
- start = pci_resource_start(dc->pdev, 0);
- if (start == 0) {
- dev_err(&pdev->dev, "No I/O address for card detected\n");
- ret = -ENODEV;
- goto err_rel_regs;
- }
-
- /* Find out what card type it is */
- nozomi_get_card_type(dc);
-
- dc->base_addr = ioremap_nocache(start, dc->card_type);
- if (!dc->base_addr) {
- dev_err(&pdev->dev, "Unable to map card MMIO\n");
- ret = -ENODEV;
- goto err_rel_regs;
- }
-
- dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
- if (!dc->send_buf) {
- dev_err(&pdev->dev, "Could not allocate send buffer?\n");
- ret = -ENOMEM;
- goto err_free_sbuf;
- }
-
- for (i = PORT_MDM; i < MAX_PORT; i++) {
- if (kfifo_alloc(&dc->port[i].fifo_ul,
- FIFO_BUFFER_SIZE_UL, GFP_ATOMIC)) {
- dev_err(&pdev->dev,
- "Could not allocate kfifo buffer\n");
- ret = -ENOMEM;
- goto err_free_kfifo;
- }
- }
-
- spin_lock_init(&dc->spin_mutex);
-
- nozomi_setup_private_data(dc);
-
- /* Disable all interrupts */
- dc->last_ier = 0;
- writew(dc->last_ier, dc->reg_ier);
-
- ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED,
- NOZOMI_NAME, dc);
- if (unlikely(ret)) {
- dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
- goto err_free_kfifo;
- }
-
- DBG1("base_addr: %p", dc->base_addr);
-
- make_sysfs_files(dc);
-
- dc->index_start = ndev_idx * MAX_PORT;
- ndevs[ndev_idx] = dc;
-
- pci_set_drvdata(pdev, dc);
-
- /* Enable RESET interrupt */
- dc->last_ier = RESET;
- iowrite16(dc->last_ier, dc->reg_ier);
-
- dc->state = NOZOMI_STATE_ENABLED;
-
- for (i = 0; i < MAX_PORT; i++) {
- struct device *tty_dev;
- struct port *port = &dc->port[i];
- port->dc = dc;
- mutex_init(&port->tty_sem);
- tty_port_init(&port->port);
- port->port.ops = &noz_tty_port_ops;
- tty_dev = tty_register_device(ntty_driver, dc->index_start + i,
- &pdev->dev);
-
- if (IS_ERR(tty_dev)) {
- ret = PTR_ERR(tty_dev);
- dev_err(&pdev->dev, "Could not allocate tty?\n");
- goto err_free_tty;
- }
- }
-
- return 0;
-
-err_free_tty:
- for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
- tty_unregister_device(ntty_driver, i);
-err_free_kfifo:
- for (i = 0; i < MAX_PORT; i++)
- kfifo_free(&dc->port[i].fifo_ul);
-err_free_sbuf:
- kfree(dc->send_buf);
- iounmap(dc->base_addr);
-err_rel_regs:
- pci_release_regions(pdev);
-err_disable_device:
- pci_disable_device(pdev);
-err_free:
- kfree(dc);
-err:
- return ret;
-}
-
-static void __devexit tty_exit(struct nozomi *dc)
-{
- unsigned int i;
-
- DBG1(" ");
-
- flush_scheduled_work();
-
- for (i = 0; i < MAX_PORT; ++i) {
- struct tty_struct *tty = tty_port_tty_get(&dc->port[i].port);
- if (tty && list_empty(&tty->hangup_work.entry))
- tty_hangup(tty);
- tty_kref_put(tty);
- }
- /* Racy below - surely should wait for scheduled work to be done or
- complete off a hangup method ? */
- while (dc->open_ttys)
- msleep(1);
- for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
- tty_unregister_device(ntty_driver, i);
-}
-
-/* Deallocate memory for one device */
-static void __devexit nozomi_card_exit(struct pci_dev *pdev)
-{
- int i;
- struct ctrl_ul ctrl;
- struct nozomi *dc = pci_get_drvdata(pdev);
-
- /* Disable all interrupts */
- dc->last_ier = 0;
- writew(dc->last_ier, dc->reg_ier);
-
- tty_exit(dc);
-
- /* Send 0x0001, command card to resend the reset token. */
- /* This is to get the reset when the module is reloaded. */
- ctrl.port = 0x00;
- ctrl.reserved = 0;
- ctrl.RTS = 0;
- ctrl.DTR = 1;
- DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
-
- /* Setup dc->reg addresses to we can use defines here */
- write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
- writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */
-
- remove_sysfs_files(dc);
-
- free_irq(pdev->irq, dc);
-
- for (i = 0; i < MAX_PORT; i++)
- kfifo_free(&dc->port[i].fifo_ul);
-
- kfree(dc->send_buf);
-
- iounmap(dc->base_addr);
-
- pci_release_regions(pdev);
-
- pci_disable_device(pdev);
-
- ndevs[dc->index_start / MAX_PORT] = NULL;
-
- kfree(dc);
-}
-
-static void set_rts(const struct tty_struct *tty, int rts)
-{
- struct port *port = get_port_by_tty(tty);
-
- port->ctrl_ul.RTS = rts;
- port->update_flow_control = 1;
- enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
-}
-
-static void set_dtr(const struct tty_struct *tty, int dtr)
-{
- struct port *port = get_port_by_tty(tty);
-
- DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr);
-
- port->ctrl_ul.DTR = dtr;
- port->update_flow_control = 1;
- enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
-}
-
-/*
- * ----------------------------------------------------------------------------
- * TTY code
- * ----------------------------------------------------------------------------
- */
-
-static int ntty_install(struct tty_driver *driver, struct tty_struct *tty)
-{
- struct port *port = get_port_by_tty(tty);
- struct nozomi *dc = get_dc_by_tty(tty);
- int ret;
- if (!port || !dc || dc->state != NOZOMI_STATE_READY)
- return -ENODEV;
- ret = tty_init_termios(tty);
- if (ret == 0) {
- tty_driver_kref_get(driver);
- tty->count++;
- tty->driver_data = port;
- driver->ttys[tty->index] = tty;
- }
- return ret;
-}
-
-static void ntty_cleanup(struct tty_struct *tty)
-{
- tty->driver_data = NULL;
-}
-
-static int ntty_activate(struct tty_port *tport, struct tty_struct *tty)
-{
- struct port *port = container_of(tport, struct port, port);
- struct nozomi *dc = port->dc;
- unsigned long flags;
-
- DBG1("open: %d", port->token_dl);
- spin_lock_irqsave(&dc->spin_mutex, flags);
- dc->last_ier = dc->last_ier | port->token_dl;
- writew(dc->last_ier, dc->reg_ier);
- dc->open_ttys++;
- spin_unlock_irqrestore(&dc->spin_mutex, flags);
- printk("noz: activated %d: %p\n", tty->index, tport);
- return 0;
-}
-
-static int ntty_open(struct tty_struct *tty, struct file *filp)
-{
- struct port *port = tty->driver_data;
- return tty_port_open(&port->port, tty, filp);
-}
-
-static void ntty_shutdown(struct tty_port *tport)
-{
- struct port *port = container_of(tport, struct port, port);
- struct nozomi *dc = port->dc;
- unsigned long flags;
-
- DBG1("close: %d", port->token_dl);
- spin_lock_irqsave(&dc->spin_mutex, flags);
- dc->last_ier &= ~(port->token_dl);
- writew(dc->last_ier, dc->reg_ier);
- dc->open_ttys--;
- spin_unlock_irqrestore(&dc->spin_mutex, flags);
- printk("noz: shutdown %p\n", tport);
-}
-
-static void ntty_close(struct tty_struct *tty, struct file *filp)
-{
- struct port *port = tty->driver_data;
- if (port)
- tty_port_close(&port->port, tty, filp);
-}
-
-static void ntty_hangup(struct tty_struct *tty)
-{
- struct port *port = tty->driver_data;
- tty_port_hangup(&port->port);
-}
-
-/*
- * called when the userspace process writes to the tty (/dev/noz*).
- * Data is inserted into a fifo, which is then read and transfered to the modem.
- */
-static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
- int count)
-{
- int rval = -EINVAL;
- struct nozomi *dc = get_dc_by_tty(tty);
- struct port *port = tty->driver_data;
- unsigned long flags;
-
- /* DBG1( "WRITEx: %d, index = %d", count, index); */
-
- if (!dc || !port)
- return -ENODEV;
-
- mutex_lock(&port->tty_sem);
-
- if (unlikely(!port->port.count)) {
- DBG1(" ");
- goto exit;
- }
-
- rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count);
-
- /* notify card */
- if (unlikely(dc == NULL)) {
- DBG1("No device context?");
- goto exit;
- }
-
- spin_lock_irqsave(&dc->spin_mutex, flags);
- /* CTS is only valid on the modem channel */
- if (port == &(dc->port[PORT_MDM])) {
- if (port->ctrl_dl.CTS) {
- DBG4("Enable interrupt");
- enable_transmit_ul(tty->index % MAX_PORT, dc);
- } else {
- dev_err(&dc->pdev->dev,
- "CTS not active on modem port?\n");
- }
- } else {
- enable_transmit_ul(tty->index % MAX_PORT, dc);
- }
- spin_unlock_irqrestore(&dc->spin_mutex, flags);
-
-exit:
- mutex_unlock(&port->tty_sem);
- return rval;
-}
-
-/*
- * Calculate how much is left in device
- * This method is called by the upper tty layer.
- * #according to sources N_TTY.c it expects a value >= 0 and
- * does not check for negative values.
- *
- * If the port is unplugged report lots of room and let the bits
- * dribble away so we don't block anything.
- */
-static int ntty_write_room(struct tty_struct *tty)
-{
- struct port *port = tty->driver_data;
- int room = 4096;
- const struct nozomi *dc = get_dc_by_tty(tty);
-
- if (dc) {
- mutex_lock(&port->tty_sem);
- if (port->port.count)
- room = kfifo_avail(&port->fifo_ul);
- mutex_unlock(&port->tty_sem);
- }
- return room;
-}
-
-/* Gets io control parameters */
-static int ntty_tiocmget(struct tty_struct *tty)
-{
- const struct port *port = tty->driver_data;
- const struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
- const struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
-
- /* Note: these could change under us but it is not clear this
- matters if so */
- return (ctrl_ul->RTS ? TIOCM_RTS : 0) |
- (ctrl_ul->DTR ? TIOCM_DTR : 0) |
- (ctrl_dl->DCD ? TIOCM_CAR : 0) |
- (ctrl_dl->RI ? TIOCM_RNG : 0) |
- (ctrl_dl->DSR ? TIOCM_DSR : 0) |
- (ctrl_dl->CTS ? TIOCM_CTS : 0);
-}
-
-/* Sets io controls parameters */
-static int ntty_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- struct nozomi *dc = get_dc_by_tty(tty);
- unsigned long flags;
-
- spin_lock_irqsave(&dc->spin_mutex, flags);
- if (set & TIOCM_RTS)
- set_rts(tty, 1);
- else if (clear & TIOCM_RTS)
- set_rts(tty, 0);
-
- if (set & TIOCM_DTR)
- set_dtr(tty, 1);
- else if (clear & TIOCM_DTR)
- set_dtr(tty, 0);
- spin_unlock_irqrestore(&dc->spin_mutex, flags);
-
- return 0;
-}
-
-static int ntty_cflags_changed(struct port *port, unsigned long flags,
- struct async_icount *cprev)
-{
- const struct async_icount cnow = port->tty_icount;
- int ret;
-
- ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
- ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
- ((flags & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
- ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts));
-
- *cprev = cnow;
-
- return ret;
-}
-
-static int ntty_tiocgicount(struct tty_struct *tty,
- struct serial_icounter_struct *icount)
-{
- struct port *port = tty->driver_data;
- const struct async_icount cnow = port->tty_icount;
-
- icount->cts = cnow.cts;
- icount->dsr = cnow.dsr;
- icount->rng = cnow.rng;
- icount->dcd = cnow.dcd;
- icount->rx = cnow.rx;
- icount->tx = cnow.tx;
- icount->frame = cnow.frame;
- icount->overrun = cnow.overrun;
- icount->parity = cnow.parity;
- icount->brk = cnow.brk;
- icount->buf_overrun = cnow.buf_overrun;
- return 0;
-}
-
-static int ntty_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct port *port = tty->driver_data;
- int rval = -ENOIOCTLCMD;
-
- DBG1("******** IOCTL, cmd: %d", cmd);
-
- switch (cmd) {
- case TIOCMIWAIT: {
- struct async_icount cprev = port->tty_icount;
-
- rval = wait_event_interruptible(port->tty_wait,
- ntty_cflags_changed(port, arg, &cprev));
- break;
- }
- default:
- DBG1("ERR: 0x%08X, %d", cmd, cmd);
- break;
- };
-
- return rval;
-}
-
-/*
- * Called by the upper tty layer when tty buffers are ready
- * to receive data again after a call to throttle.
- */
-static void ntty_unthrottle(struct tty_struct *tty)
-{
- struct nozomi *dc = get_dc_by_tty(tty);
- unsigned long flags;
-
- DBG1("UNTHROTTLE");
- spin_lock_irqsave(&dc->spin_mutex, flags);
- enable_transmit_dl(tty->index % MAX_PORT, dc);
- set_rts(tty, 1);
-
- spin_unlock_irqrestore(&dc->spin_mutex, flags);
-}
-
-/*
- * Called by the upper tty layer when the tty buffers are almost full.
- * The driver should stop send more data.
- */
-static void ntty_throttle(struct tty_struct *tty)
-{
- struct nozomi *dc = get_dc_by_tty(tty);
- unsigned long flags;
-
- DBG1("THROTTLE");
- spin_lock_irqsave(&dc->spin_mutex, flags);
- set_rts(tty, 0);
- spin_unlock_irqrestore(&dc->spin_mutex, flags);
-}
-
-/* Returns number of chars in buffer, called by tty layer */
-static s32 ntty_chars_in_buffer(struct tty_struct *tty)
-{
- struct port *port = tty->driver_data;
- struct nozomi *dc = get_dc_by_tty(tty);
- s32 rval = 0;
-
- if (unlikely(!dc || !port)) {
- goto exit_in_buffer;
- }
-
- if (unlikely(!port->port.count)) {
- dev_err(&dc->pdev->dev, "No tty open?\n");
- goto exit_in_buffer;
- }
-
- rval = kfifo_len(&port->fifo_ul);
-
-exit_in_buffer:
- return rval;
-}
-
-static const struct tty_port_operations noz_tty_port_ops = {
- .activate = ntty_activate,
- .shutdown = ntty_shutdown,
-};
-
-static const struct tty_operations tty_ops = {
- .ioctl = ntty_ioctl,
- .open = ntty_open,
- .close = ntty_close,
- .hangup = ntty_hangup,
- .write = ntty_write,
- .write_room = ntty_write_room,
- .unthrottle = ntty_unthrottle,
- .throttle = ntty_throttle,
- .chars_in_buffer = ntty_chars_in_buffer,
- .tiocmget = ntty_tiocmget,
- .tiocmset = ntty_tiocmset,
- .get_icount = ntty_tiocgicount,
- .install = ntty_install,
- .cleanup = ntty_cleanup,
-};
-
-/* Module initialization */
-static struct pci_driver nozomi_driver = {
- .name = NOZOMI_NAME,
- .id_table = nozomi_pci_tbl,
- .probe = nozomi_card_init,
- .remove = __devexit_p(nozomi_card_exit),
-};
-
-static __init int nozomi_init(void)
-{
- int ret;
-
- printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
-
- ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
- if (!ntty_driver)
- return -ENOMEM;
-
- ntty_driver->owner = THIS_MODULE;
- ntty_driver->driver_name = NOZOMI_NAME_TTY;
- ntty_driver->name = "noz";
- ntty_driver->major = 0;
- ntty_driver->type = TTY_DRIVER_TYPE_SERIAL;
- ntty_driver->subtype = SERIAL_TYPE_NORMAL;
- ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
- ntty_driver->init_termios = tty_std_termios;
- ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \
- HUPCL | CLOCAL;
- ntty_driver->init_termios.c_ispeed = 115200;
- ntty_driver->init_termios.c_ospeed = 115200;
- tty_set_operations(ntty_driver, &tty_ops);
-
- ret = tty_register_driver(ntty_driver);
- if (ret) {
- printk(KERN_ERR "Nozomi: failed to register ntty driver\n");
- goto free_tty;
- }
-
- ret = pci_register_driver(&nozomi_driver);
- if (ret) {
- printk(KERN_ERR "Nozomi: can't register pci driver\n");
- goto unr_tty;
- }
-
- return 0;
-unr_tty:
- tty_unregister_driver(ntty_driver);
-free_tty:
- put_tty_driver(ntty_driver);
- return ret;
-}
-
-static __exit void nozomi_exit(void)
-{
- printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
- pci_unregister_driver(&nozomi_driver);
- tty_unregister_driver(ntty_driver);
- put_tty_driver(ntty_driver);
-}
-
-module_init(nozomi_init);
-module_exit(nozomi_exit);
-
-module_param(debug, int, S_IRUGO | S_IWUSR);
-
-MODULE_LICENSE("Dual BSD/GPL");
-MODULE_DESCRIPTION(DRIVER_DESC);
+++ /dev/null
-/*
- * RocketPort device driver for Linux
- *
- * Written by Theodore Ts'o, 1995, 1996, 1997, 1998, 1999, 2000.
- *
- * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2003 by Comtrol, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-/*
- * Kernel Synchronization:
- *
- * This driver has 2 kernel control paths - exception handlers (calls into the driver
- * from user mode) and the timer bottom half (tasklet). This is a polled driver, interrupts
- * are not used.
- *
- * Critical data:
- * - rp_table[], accessed through passed "info" pointers, is a global (static) array of
- * serial port state information and the xmit_buf circular buffer. Protected by
- * a per port spinlock.
- * - xmit_flags[], an array of ints indexed by line (port) number, indicating that there
- * is data to be transmitted. Protected by atomic bit operations.
- * - rp_num_ports, int indicating number of open ports, protected by atomic operations.
- *
- * rp_write() and rp_write_char() functions use a per port semaphore to protect against
- * simultaneous access to the same port by more than one process.
- */
-
-/****** Defines ******/
-#define ROCKET_PARANOIA_CHECK
-#define ROCKET_DISABLE_SIMUSAGE
-
-#undef ROCKET_SOFT_FLOW
-#undef ROCKET_DEBUG_OPEN
-#undef ROCKET_DEBUG_INTR
-#undef ROCKET_DEBUG_WRITE
-#undef ROCKET_DEBUG_FLOW
-#undef ROCKET_DEBUG_THROTTLE
-#undef ROCKET_DEBUG_WAIT_UNTIL_SENT
-#undef ROCKET_DEBUG_RECEIVE
-#undef ROCKET_DEBUG_HANGUP
-#undef REV_PCI_ORDER
-#undef ROCKET_DEBUG_IO
-
-#define POLL_PERIOD HZ/100 /* Polling period .01 seconds (10ms) */
-
-/****** Kernel includes ******/
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/major.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_driver.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/mutex.h>
-#include <linux/ioport.h>
-#include <linux/delay.h>
-#include <linux/completion.h>
-#include <linux/wait.h>
-#include <linux/pci.h>
-#include <linux/uaccess.h>
-#include <asm/atomic.h>
-#include <asm/unaligned.h>
-#include <linux/bitops.h>
-#include <linux/spinlock.h>
-#include <linux/init.h>
-
-/****** RocketPort includes ******/
-
-#include "rocket_int.h"
-#include "rocket.h"
-
-#define ROCKET_VERSION "2.09"
-#define ROCKET_DATE "12-June-2003"
-
-/****** RocketPort Local Variables ******/
-
-static void rp_do_poll(unsigned long dummy);
-
-static struct tty_driver *rocket_driver;
-
-static struct rocket_version driver_version = {
- ROCKET_VERSION, ROCKET_DATE
-};
-
-static struct r_port *rp_table[MAX_RP_PORTS]; /* The main repository of serial port state information. */
-static unsigned int xmit_flags[NUM_BOARDS]; /* Bit significant, indicates port had data to transmit. */
- /* eg. Bit 0 indicates port 0 has xmit data, ... */
-static atomic_t rp_num_ports_open; /* Number of serial ports open */
-static DEFINE_TIMER(rocket_timer, rp_do_poll, 0, 0);
-
-static unsigned long board1; /* ISA addresses, retrieved from rocketport.conf */
-static unsigned long board2;
-static unsigned long board3;
-static unsigned long board4;
-static unsigned long controller;
-static int support_low_speed;
-static unsigned long modem1;
-static unsigned long modem2;
-static unsigned long modem3;
-static unsigned long modem4;
-static unsigned long pc104_1[8];
-static unsigned long pc104_2[8];
-static unsigned long pc104_3[8];
-static unsigned long pc104_4[8];
-static unsigned long *pc104[4] = { pc104_1, pc104_2, pc104_3, pc104_4 };
-
-static int rp_baud_base[NUM_BOARDS]; /* Board config info (Someday make a per-board structure) */
-static unsigned long rcktpt_io_addr[NUM_BOARDS];
-static int rcktpt_type[NUM_BOARDS];
-static int is_PCI[NUM_BOARDS];
-static rocketModel_t rocketModel[NUM_BOARDS];
-static int max_board;
-static const struct tty_port_operations rocket_port_ops;
-
-/*
- * The following arrays define the interrupt bits corresponding to each AIOP.
- * These bits are different between the ISA and regular PCI boards and the
- * Universal PCI boards.
- */
-
-static Word_t aiop_intr_bits[AIOP_CTL_SIZE] = {
- AIOP_INTR_BIT_0,
- AIOP_INTR_BIT_1,
- AIOP_INTR_BIT_2,
- AIOP_INTR_BIT_3
-};
-
-static Word_t upci_aiop_intr_bits[AIOP_CTL_SIZE] = {
- UPCI_AIOP_INTR_BIT_0,
- UPCI_AIOP_INTR_BIT_1,
- UPCI_AIOP_INTR_BIT_2,
- UPCI_AIOP_INTR_BIT_3
-};
-
-static Byte_t RData[RDATASIZE] = {
- 0x00, 0x09, 0xf6, 0x82,
- 0x02, 0x09, 0x86, 0xfb,
- 0x04, 0x09, 0x00, 0x0a,
- 0x06, 0x09, 0x01, 0x0a,
- 0x08, 0x09, 0x8a, 0x13,
- 0x0a, 0x09, 0xc5, 0x11,
- 0x0c, 0x09, 0x86, 0x85,
- 0x0e, 0x09, 0x20, 0x0a,
- 0x10, 0x09, 0x21, 0x0a,
- 0x12, 0x09, 0x41, 0xff,
- 0x14, 0x09, 0x82, 0x00,
- 0x16, 0x09, 0x82, 0x7b,
- 0x18, 0x09, 0x8a, 0x7d,
- 0x1a, 0x09, 0x88, 0x81,
- 0x1c, 0x09, 0x86, 0x7a,
- 0x1e, 0x09, 0x84, 0x81,
- 0x20, 0x09, 0x82, 0x7c,
- 0x22, 0x09, 0x0a, 0x0a
-};
-
-static Byte_t RRegData[RREGDATASIZE] = {
- 0x00, 0x09, 0xf6, 0x82, /* 00: Stop Rx processor */
- 0x08, 0x09, 0x8a, 0x13, /* 04: Tx software flow control */
- 0x0a, 0x09, 0xc5, 0x11, /* 08: XON char */
- 0x0c, 0x09, 0x86, 0x85, /* 0c: XANY */
- 0x12, 0x09, 0x41, 0xff, /* 10: Rx mask char */
- 0x14, 0x09, 0x82, 0x00, /* 14: Compare/Ignore #0 */
- 0x16, 0x09, 0x82, 0x7b, /* 18: Compare #1 */
- 0x18, 0x09, 0x8a, 0x7d, /* 1c: Compare #2 */
- 0x1a, 0x09, 0x88, 0x81, /* 20: Interrupt #1 */
- 0x1c, 0x09, 0x86, 0x7a, /* 24: Ignore/Replace #1 */
- 0x1e, 0x09, 0x84, 0x81, /* 28: Interrupt #2 */
- 0x20, 0x09, 0x82, 0x7c, /* 2c: Ignore/Replace #2 */
- 0x22, 0x09, 0x0a, 0x0a /* 30: Rx FIFO Enable */
-};
-
-static CONTROLLER_T sController[CTL_SIZE] = {
- {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0},
- {0, 0, 0, 0}, {-1, -1, -1, -1}, {0, 0, 0, 0}},
- {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0},
- {0, 0, 0, 0}, {-1, -1, -1, -1}, {0, 0, 0, 0}},
- {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0},
- {0, 0, 0, 0}, {-1, -1, -1, -1}, {0, 0, 0, 0}},
- {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0},
- {0, 0, 0, 0}, {-1, -1, -1, -1}, {0, 0, 0, 0}}
-};
-
-static Byte_t sBitMapClrTbl[8] = {
- 0xfe, 0xfd, 0xfb, 0xf7, 0xef, 0xdf, 0xbf, 0x7f
-};
-
-static Byte_t sBitMapSetTbl[8] = {
- 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80
-};
-
-static int sClockPrescale = 0x14;
-
-/*
- * Line number is the ttySIx number (x), the Minor number. We
- * assign them sequentially, starting at zero. The following
- * array keeps track of the line number assigned to a given board/aiop/channel.
- */
-static unsigned char lineNumbers[MAX_RP_PORTS];
-static unsigned long nextLineNumber;
-
-/***** RocketPort Static Prototypes *********/
-static int __init init_ISA(int i);
-static void rp_wait_until_sent(struct tty_struct *tty, int timeout);
-static void rp_flush_buffer(struct tty_struct *tty);
-static void rmSpeakerReset(CONTROLLER_T * CtlP, unsigned long model);
-static unsigned char GetLineNumber(int ctrl, int aiop, int ch);
-static unsigned char SetLineNumber(int ctrl, int aiop, int ch);
-static void rp_start(struct tty_struct *tty);
-static int sInitChan(CONTROLLER_T * CtlP, CHANNEL_T * ChP, int AiopNum,
- int ChanNum);
-static void sSetInterfaceMode(CHANNEL_T * ChP, Byte_t mode);
-static void sFlushRxFIFO(CHANNEL_T * ChP);
-static void sFlushTxFIFO(CHANNEL_T * ChP);
-static void sEnInterrupts(CHANNEL_T * ChP, Word_t Flags);
-static void sDisInterrupts(CHANNEL_T * ChP, Word_t Flags);
-static void sModemReset(CONTROLLER_T * CtlP, int chan, int on);
-static void sPCIModemReset(CONTROLLER_T * CtlP, int chan, int on);
-static int sWriteTxPrioByte(CHANNEL_T * ChP, Byte_t Data);
-static int sPCIInitController(CONTROLLER_T * CtlP, int CtlNum,
- ByteIO_t * AiopIOList, int AiopIOListSize,
- WordIO_t ConfigIO, int IRQNum, Byte_t Frequency,
- int PeriodicOnly, int altChanRingIndicator,
- int UPCIRingInd);
-static int sInitController(CONTROLLER_T * CtlP, int CtlNum, ByteIO_t MudbacIO,
- ByteIO_t * AiopIOList, int AiopIOListSize,
- int IRQNum, Byte_t Frequency, int PeriodicOnly);
-static int sReadAiopID(ByteIO_t io);
-static int sReadAiopNumChan(WordIO_t io);
-
-MODULE_AUTHOR("Theodore Ts'o");
-MODULE_DESCRIPTION("Comtrol RocketPort driver");
-module_param(board1, ulong, 0);
-MODULE_PARM_DESC(board1, "I/O port for (ISA) board #1");
-module_param(board2, ulong, 0);
-MODULE_PARM_DESC(board2, "I/O port for (ISA) board #2");
-module_param(board3, ulong, 0);
-MODULE_PARM_DESC(board3, "I/O port for (ISA) board #3");
-module_param(board4, ulong, 0);
-MODULE_PARM_DESC(board4, "I/O port for (ISA) board #4");
-module_param(controller, ulong, 0);
-MODULE_PARM_DESC(controller, "I/O port for (ISA) rocketport controller");
-module_param(support_low_speed, bool, 0);
-MODULE_PARM_DESC(support_low_speed, "1 means support 50 baud, 0 means support 460400 baud");
-module_param(modem1, ulong, 0);
-MODULE_PARM_DESC(modem1, "1 means (ISA) board #1 is a RocketModem");
-module_param(modem2, ulong, 0);
-MODULE_PARM_DESC(modem2, "1 means (ISA) board #2 is a RocketModem");
-module_param(modem3, ulong, 0);
-MODULE_PARM_DESC(modem3, "1 means (ISA) board #3 is a RocketModem");
-module_param(modem4, ulong, 0);
-MODULE_PARM_DESC(modem4, "1 means (ISA) board #4 is a RocketModem");
-module_param_array(pc104_1, ulong, NULL, 0);
-MODULE_PARM_DESC(pc104_1, "set interface types for ISA(PC104) board #1 (e.g. pc104_1=232,232,485,485,...");
-module_param_array(pc104_2, ulong, NULL, 0);
-MODULE_PARM_DESC(pc104_2, "set interface types for ISA(PC104) board #2 (e.g. pc104_2=232,232,485,485,...");
-module_param_array(pc104_3, ulong, NULL, 0);
-MODULE_PARM_DESC(pc104_3, "set interface types for ISA(PC104) board #3 (e.g. pc104_3=232,232,485,485,...");
-module_param_array(pc104_4, ulong, NULL, 0);
-MODULE_PARM_DESC(pc104_4, "set interface types for ISA(PC104) board #4 (e.g. pc104_4=232,232,485,485,...");
-
-static int rp_init(void);
-static void rp_cleanup_module(void);
-
-module_init(rp_init);
-module_exit(rp_cleanup_module);
-
-
-MODULE_LICENSE("Dual BSD/GPL");
-
-/*************************************************************************/
-/* Module code starts here */
-
-static inline int rocket_paranoia_check(struct r_port *info,
- const char *routine)
-{
-#ifdef ROCKET_PARANOIA_CHECK
- if (!info)
- return 1;
- if (info->magic != RPORT_MAGIC) {
- printk(KERN_WARNING "Warning: bad magic number for rocketport "
- "struct in %s\n", routine);
- return 1;
- }
-#endif
- return 0;
-}
-
-
-/* Serial port receive data function. Called (from timer poll) when an AIOPIC signals
- * that receive data is present on a serial port. Pulls data from FIFO, moves it into the
- * tty layer.
- */
-static void rp_do_receive(struct r_port *info,
- struct tty_struct *tty,
- CHANNEL_t * cp, unsigned int ChanStatus)
-{
- unsigned int CharNStat;
- int ToRecv, wRecv, space;
- unsigned char *cbuf;
-
- ToRecv = sGetRxCnt(cp);
-#ifdef ROCKET_DEBUG_INTR
- printk(KERN_INFO "rp_do_receive(%d)...\n", ToRecv);
-#endif
- if (ToRecv == 0)
- return;
-
- /*
- * if status indicates there are errored characters in the
- * FIFO, then enter status mode (a word in FIFO holds
- * character and status).
- */
- if (ChanStatus & (RXFOVERFL | RXBREAK | RXFRAME | RXPARITY)) {
- if (!(ChanStatus & STATMODE)) {
-#ifdef ROCKET_DEBUG_RECEIVE
- printk(KERN_INFO "Entering STATMODE...\n");
-#endif
- ChanStatus |= STATMODE;
- sEnRxStatusMode(cp);
- }
- }
-
- /*
- * if we previously entered status mode, then read down the
- * FIFO one word at a time, pulling apart the character and
- * the status. Update error counters depending on status
- */
- if (ChanStatus & STATMODE) {
-#ifdef ROCKET_DEBUG_RECEIVE
- printk(KERN_INFO "Ignore %x, read %x...\n",
- info->ignore_status_mask, info->read_status_mask);
-#endif
- while (ToRecv) {
- char flag;
-
- CharNStat = sInW(sGetTxRxDataIO(cp));
-#ifdef ROCKET_DEBUG_RECEIVE
- printk(KERN_INFO "%x...\n", CharNStat);
-#endif
- if (CharNStat & STMBREAKH)
- CharNStat &= ~(STMFRAMEH | STMPARITYH);
- if (CharNStat & info->ignore_status_mask) {
- ToRecv--;
- continue;
- }
- CharNStat &= info->read_status_mask;
- if (CharNStat & STMBREAKH)
- flag = TTY_BREAK;
- else if (CharNStat & STMPARITYH)
- flag = TTY_PARITY;
- else if (CharNStat & STMFRAMEH)
- flag = TTY_FRAME;
- else if (CharNStat & STMRCVROVRH)
- flag = TTY_OVERRUN;
- else
- flag = TTY_NORMAL;
- tty_insert_flip_char(tty, CharNStat & 0xff, flag);
- ToRecv--;
- }
-
- /*
- * after we've emptied the FIFO in status mode, turn
- * status mode back off
- */
- if (sGetRxCnt(cp) == 0) {
-#ifdef ROCKET_DEBUG_RECEIVE
- printk(KERN_INFO "Status mode off.\n");
-#endif
- sDisRxStatusMode(cp);
- }
- } else {
- /*
- * we aren't in status mode, so read down the FIFO two
- * characters at time by doing repeated word IO
- * transfer.
- */
- space = tty_prepare_flip_string(tty, &cbuf, ToRecv);
- if (space < ToRecv) {
-#ifdef ROCKET_DEBUG_RECEIVE
- printk(KERN_INFO "rp_do_receive:insufficient space ToRecv=%d space=%d\n", ToRecv, space);
-#endif
- if (space <= 0)
- return;
- ToRecv = space;
- }
- wRecv = ToRecv >> 1;
- if (wRecv)
- sInStrW(sGetTxRxDataIO(cp), (unsigned short *) cbuf, wRecv);
- if (ToRecv & 1)
- cbuf[ToRecv - 1] = sInB(sGetTxRxDataIO(cp));
- }
- /* Push the data up to the tty layer */
- tty_flip_buffer_push(tty);
-}
-
-/*
- * Serial port transmit data function. Called from the timer polling loop as a
- * result of a bit set in xmit_flags[], indicating data (from the tty layer) is ready
- * to be sent out the serial port. Data is buffered in rp_table[line].xmit_buf, it is
- * moved to the port's xmit FIFO. *info is critical data, protected by spinlocks.
- */
-static void rp_do_transmit(struct r_port *info)
-{
- int c;
- CHANNEL_t *cp = &info->channel;
- struct tty_struct *tty;
- unsigned long flags;
-
-#ifdef ROCKET_DEBUG_INTR
- printk(KERN_DEBUG "%s\n", __func__);
-#endif
- if (!info)
- return;
- tty = tty_port_tty_get(&info->port);
-
- if (tty == NULL) {
- printk(KERN_WARNING "rp: WARNING %s called with tty==NULL\n", __func__);
- clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
- return;
- }
-
- spin_lock_irqsave(&info->slock, flags);
- info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
-
- /* Loop sending data to FIFO until done or FIFO full */
- while (1) {
- if (tty->stopped || tty->hw_stopped)
- break;
- c = min(info->xmit_fifo_room, info->xmit_cnt);
- c = min(c, XMIT_BUF_SIZE - info->xmit_tail);
- if (c <= 0 || info->xmit_fifo_room <= 0)
- break;
- sOutStrW(sGetTxRxDataIO(cp), (unsigned short *) (info->xmit_buf + info->xmit_tail), c / 2);
- if (c & 1)
- sOutB(sGetTxRxDataIO(cp), info->xmit_buf[info->xmit_tail + c - 1]);
- info->xmit_tail += c;
- info->xmit_tail &= XMIT_BUF_SIZE - 1;
- info->xmit_cnt -= c;
- info->xmit_fifo_room -= c;
-#ifdef ROCKET_DEBUG_INTR
- printk(KERN_INFO "tx %d chars...\n", c);
-#endif
- }
-
- if (info->xmit_cnt == 0)
- clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
-
- if (info->xmit_cnt < WAKEUP_CHARS) {
- tty_wakeup(tty);
-#ifdef ROCKETPORT_HAVE_POLL_WAIT
- wake_up_interruptible(&tty->poll_wait);
-#endif
- }
-
- spin_unlock_irqrestore(&info->slock, flags);
- tty_kref_put(tty);
-
-#ifdef ROCKET_DEBUG_INTR
- printk(KERN_DEBUG "(%d,%d,%d,%d)...\n", info->xmit_cnt, info->xmit_head,
- info->xmit_tail, info->xmit_fifo_room);
-#endif
-}
-
-/*
- * Called when a serial port signals it has read data in it's RX FIFO.
- * It checks what interrupts are pending and services them, including
- * receiving serial data.
- */
-static void rp_handle_port(struct r_port *info)
-{
- CHANNEL_t *cp;
- struct tty_struct *tty;
- unsigned int IntMask, ChanStatus;
-
- if (!info)
- return;
-
- if ((info->port.flags & ASYNC_INITIALIZED) == 0) {
- printk(KERN_WARNING "rp: WARNING: rp_handle_port called with "
- "info->flags & NOT_INIT\n");
- return;
- }
- tty = tty_port_tty_get(&info->port);
- if (!tty) {
- printk(KERN_WARNING "rp: WARNING: rp_handle_port called with "
- "tty==NULL\n");
- return;
- }
- cp = &info->channel;
-
- IntMask = sGetChanIntID(cp) & info->intmask;
-#ifdef ROCKET_DEBUG_INTR
- printk(KERN_INFO "rp_interrupt %02x...\n", IntMask);
-#endif
- ChanStatus = sGetChanStatus(cp);
- if (IntMask & RXF_TRIG) { /* Rx FIFO trigger level */
- rp_do_receive(info, tty, cp, ChanStatus);
- }
- if (IntMask & DELTA_CD) { /* CD change */
-#if (defined(ROCKET_DEBUG_OPEN) || defined(ROCKET_DEBUG_INTR) || defined(ROCKET_DEBUG_HANGUP))
- printk(KERN_INFO "ttyR%d CD now %s...\n", info->line,
- (ChanStatus & CD_ACT) ? "on" : "off");
-#endif
- if (!(ChanStatus & CD_ACT) && info->cd_status) {
-#ifdef ROCKET_DEBUG_HANGUP
- printk(KERN_INFO "CD drop, calling hangup.\n");
-#endif
- tty_hangup(tty);
- }
- info->cd_status = (ChanStatus & CD_ACT) ? 1 : 0;
- wake_up_interruptible(&info->port.open_wait);
- }
-#ifdef ROCKET_DEBUG_INTR
- if (IntMask & DELTA_CTS) { /* CTS change */
- printk(KERN_INFO "CTS change...\n");
- }
- if (IntMask & DELTA_DSR) { /* DSR change */
- printk(KERN_INFO "DSR change...\n");
- }
-#endif
- tty_kref_put(tty);
-}
-
-/*
- * The top level polling routine. Repeats every 1/100 HZ (10ms).
- */
-static void rp_do_poll(unsigned long dummy)
-{
- CONTROLLER_t *ctlp;
- int ctrl, aiop, ch, line;
- unsigned int xmitmask, i;
- unsigned int CtlMask;
- unsigned char AiopMask;
- Word_t bit;
-
- /* Walk through all the boards (ctrl's) */
- for (ctrl = 0; ctrl < max_board; ctrl++) {
- if (rcktpt_io_addr[ctrl] <= 0)
- continue;
-
- /* Get a ptr to the board's control struct */
- ctlp = sCtlNumToCtlPtr(ctrl);
-
- /* Get the interrupt status from the board */
-#ifdef CONFIG_PCI
- if (ctlp->BusType == isPCI)
- CtlMask = sPCIGetControllerIntStatus(ctlp);
- else
-#endif
- CtlMask = sGetControllerIntStatus(ctlp);
-
- /* Check if any AIOP read bits are set */
- for (aiop = 0; CtlMask; aiop++) {
- bit = ctlp->AiopIntrBits[aiop];
- if (CtlMask & bit) {
- CtlMask &= ~bit;
- AiopMask = sGetAiopIntStatus(ctlp, aiop);
-
- /* Check if any port read bits are set */
- for (ch = 0; AiopMask; AiopMask >>= 1, ch++) {
- if (AiopMask & 1) {
-
- /* Get the line number (/dev/ttyRx number). */
- /* Read the data from the port. */
- line = GetLineNumber(ctrl, aiop, ch);
- rp_handle_port(rp_table[line]);
- }
- }
- }
- }
-
- xmitmask = xmit_flags[ctrl];
-
- /*
- * xmit_flags contains bit-significant flags, indicating there is data
- * to xmit on the port. Bit 0 is port 0 on this board, bit 1 is port
- * 1, ... (32 total possible). The variable i has the aiop and ch
- * numbers encoded in it (port 0-7 are aiop0, 8-15 are aiop1, etc).
- */
- if (xmitmask) {
- for (i = 0; i < rocketModel[ctrl].numPorts; i++) {
- if (xmitmask & (1 << i)) {
- aiop = (i & 0x18) >> 3;
- ch = i & 0x07;
- line = GetLineNumber(ctrl, aiop, ch);
- rp_do_transmit(rp_table[line]);
- }
- }
- }
- }
-
- /*
- * Reset the timer so we get called at the next clock tick (10ms).
- */
- if (atomic_read(&rp_num_ports_open))
- mod_timer(&rocket_timer, jiffies + POLL_PERIOD);
-}
-
-/*
- * Initializes the r_port structure for a port, as well as enabling the port on
- * the board.
- * Inputs: board, aiop, chan numbers
- */
-static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev)
-{
- unsigned rocketMode;
- struct r_port *info;
- int line;
- CONTROLLER_T *ctlp;
-
- /* Get the next available line number */
- line = SetLineNumber(board, aiop, chan);
-
- ctlp = sCtlNumToCtlPtr(board);
-
- /* Get a r_port struct for the port, fill it in and save it globally, indexed by line number */
- info = kzalloc(sizeof (struct r_port), GFP_KERNEL);
- if (!info) {
- printk(KERN_ERR "Couldn't allocate info struct for line #%d\n",
- line);
- return;
- }
-
- info->magic = RPORT_MAGIC;
- info->line = line;
- info->ctlp = ctlp;
- info->board = board;
- info->aiop = aiop;
- info->chan = chan;
- tty_port_init(&info->port);
- info->port.ops = &rocket_port_ops;
- init_completion(&info->close_wait);
- info->flags &= ~ROCKET_MODE_MASK;
- switch (pc104[board][line]) {
- case 422:
- info->flags |= ROCKET_MODE_RS422;
- break;
- case 485:
- info->flags |= ROCKET_MODE_RS485;
- break;
- case 232:
- default:
- info->flags |= ROCKET_MODE_RS232;
- break;
- }
-
- info->intmask = RXF_TRIG | TXFIFO_MT | SRC_INT | DELTA_CD | DELTA_CTS | DELTA_DSR;
- if (sInitChan(ctlp, &info->channel, aiop, chan) == 0) {
- printk(KERN_ERR "RocketPort sInitChan(%d, %d, %d) failed!\n",
- board, aiop, chan);
- kfree(info);
- return;
- }
-
- rocketMode = info->flags & ROCKET_MODE_MASK;
-
- if ((info->flags & ROCKET_RTS_TOGGLE) || (rocketMode == ROCKET_MODE_RS485))
- sEnRTSToggle(&info->channel);
- else
- sDisRTSToggle(&info->channel);
-
- if (ctlp->boardType == ROCKET_TYPE_PC104) {
- switch (rocketMode) {
- case ROCKET_MODE_RS485:
- sSetInterfaceMode(&info->channel, InterfaceModeRS485);
- break;
- case ROCKET_MODE_RS422:
- sSetInterfaceMode(&info->channel, InterfaceModeRS422);
- break;
- case ROCKET_MODE_RS232:
- default:
- if (info->flags & ROCKET_RTS_TOGGLE)
- sSetInterfaceMode(&info->channel, InterfaceModeRS232T);
- else
- sSetInterfaceMode(&info->channel, InterfaceModeRS232);
- break;
- }
- }
- spin_lock_init(&info->slock);
- mutex_init(&info->write_mtx);
- rp_table[line] = info;
- tty_register_device(rocket_driver, line, pci_dev ? &pci_dev->dev :
- NULL);
-}
-
-/*
- * Configures a rocketport port according to its termio settings. Called from
- * user mode into the driver (exception handler). *info CD manipulation is spinlock protected.
- */
-static void configure_r_port(struct tty_struct *tty, struct r_port *info,
- struct ktermios *old_termios)
-{
- unsigned cflag;
- unsigned long flags;
- unsigned rocketMode;
- int bits, baud, divisor;
- CHANNEL_t *cp;
- struct ktermios *t = tty->termios;
-
- cp = &info->channel;
- cflag = t->c_cflag;
-
- /* Byte size and parity */
- if ((cflag & CSIZE) == CS8) {
- sSetData8(cp);
- bits = 10;
- } else {
- sSetData7(cp);
- bits = 9;
- }
- if (cflag & CSTOPB) {
- sSetStop2(cp);
- bits++;
- } else {
- sSetStop1(cp);
- }
-
- if (cflag & PARENB) {
- sEnParity(cp);
- bits++;
- if (cflag & PARODD) {
- sSetOddParity(cp);
- } else {
- sSetEvenParity(cp);
- }
- } else {
- sDisParity(cp);
- }
-
- /* baud rate */
- baud = tty_get_baud_rate(tty);
- if (!baud)
- baud = 9600;
- divisor = ((rp_baud_base[info->board] + (baud >> 1)) / baud) - 1;
- if ((divisor >= 8192 || divisor < 0) && old_termios) {
- baud = tty_termios_baud_rate(old_termios);
- if (!baud)
- baud = 9600;
- divisor = (rp_baud_base[info->board] / baud) - 1;
- }
- if (divisor >= 8192 || divisor < 0) {
- baud = 9600;
- divisor = (rp_baud_base[info->board] / baud) - 1;
- }
- info->cps = baud / bits;
- sSetBaud(cp, divisor);
-
- /* FIXME: Should really back compute a baud rate from the divisor */
- tty_encode_baud_rate(tty, baud, baud);
-
- if (cflag & CRTSCTS) {
- info->intmask |= DELTA_CTS;
- sEnCTSFlowCtl(cp);
- } else {
- info->intmask &= ~DELTA_CTS;
- sDisCTSFlowCtl(cp);
- }
- if (cflag & CLOCAL) {
- info->intmask &= ~DELTA_CD;
- } else {
- spin_lock_irqsave(&info->slock, flags);
- if (sGetChanStatus(cp) & CD_ACT)
- info->cd_status = 1;
- else
- info->cd_status = 0;
- info->intmask |= DELTA_CD;
- spin_unlock_irqrestore(&info->slock, flags);
- }
-
- /*
- * Handle software flow control in the board
- */
-#ifdef ROCKET_SOFT_FLOW
- if (I_IXON(tty)) {
- sEnTxSoftFlowCtl(cp);
- if (I_IXANY(tty)) {
- sEnIXANY(cp);
- } else {
- sDisIXANY(cp);
- }
- sSetTxXONChar(cp, START_CHAR(tty));
- sSetTxXOFFChar(cp, STOP_CHAR(tty));
- } else {
- sDisTxSoftFlowCtl(cp);
- sDisIXANY(cp);
- sClrTxXOFF(cp);
- }
-#endif
-
- /*
- * Set up ignore/read mask words
- */
- info->read_status_mask = STMRCVROVRH | 0xFF;
- if (I_INPCK(tty))
- info->read_status_mask |= STMFRAMEH | STMPARITYH;
- if (I_BRKINT(tty) || I_PARMRK(tty))
- info->read_status_mask |= STMBREAKH;
-
- /*
- * Characters to ignore
- */
- info->ignore_status_mask = 0;
- if (I_IGNPAR(tty))
- info->ignore_status_mask |= STMFRAMEH | STMPARITYH;
- if (I_IGNBRK(tty)) {
- info->ignore_status_mask |= STMBREAKH;
- /*
- * If we're ignoring parity and break indicators,
- * ignore overruns too. (For real raw support).
- */
- if (I_IGNPAR(tty))
- info->ignore_status_mask |= STMRCVROVRH;
- }
-
- rocketMode = info->flags & ROCKET_MODE_MASK;
-
- if ((info->flags & ROCKET_RTS_TOGGLE)
- || (rocketMode == ROCKET_MODE_RS485))
- sEnRTSToggle(cp);
- else
- sDisRTSToggle(cp);
-
- sSetRTS(&info->channel);
-
- if (cp->CtlP->boardType == ROCKET_TYPE_PC104) {
- switch (rocketMode) {
- case ROCKET_MODE_RS485:
- sSetInterfaceMode(cp, InterfaceModeRS485);
- break;
- case ROCKET_MODE_RS422:
- sSetInterfaceMode(cp, InterfaceModeRS422);
- break;
- case ROCKET_MODE_RS232:
- default:
- if (info->flags & ROCKET_RTS_TOGGLE)
- sSetInterfaceMode(cp, InterfaceModeRS232T);
- else
- sSetInterfaceMode(cp, InterfaceModeRS232);
- break;
- }
- }
-}
-
-static int carrier_raised(struct tty_port *port)
-{
- struct r_port *info = container_of(port, struct r_port, port);
- return (sGetChanStatusLo(&info->channel) & CD_ACT) ? 1 : 0;
-}
-
-static void dtr_rts(struct tty_port *port, int on)
-{
- struct r_port *info = container_of(port, struct r_port, port);
- if (on) {
- sSetDTR(&info->channel);
- sSetRTS(&info->channel);
- } else {
- sClrDTR(&info->channel);
- sClrRTS(&info->channel);
- }
-}
-
-/*
- * Exception handler that opens a serial port. Creates xmit_buf storage, fills in
- * port's r_port struct. Initializes the port hardware.
- */
-static int rp_open(struct tty_struct *tty, struct file *filp)
-{
- struct r_port *info;
- struct tty_port *port;
- int line = 0, retval;
- CHANNEL_t *cp;
- unsigned long page;
-
- line = tty->index;
- if (line < 0 || line >= MAX_RP_PORTS || ((info = rp_table[line]) == NULL))
- return -ENXIO;
- port = &info->port;
-
- page = __get_free_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
-
- if (port->flags & ASYNC_CLOSING) {
- retval = wait_for_completion_interruptible(&info->close_wait);
- free_page(page);
- if (retval)
- return retval;
- return ((port->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
- }
-
- /*
- * We must not sleep from here until the port is marked fully in use.
- */
- if (info->xmit_buf)
- free_page(page);
- else
- info->xmit_buf = (unsigned char *) page;
-
- tty->driver_data = info;
- tty_port_tty_set(port, tty);
-
- if (port->count++ == 0) {
- atomic_inc(&rp_num_ports_open);
-
-#ifdef ROCKET_DEBUG_OPEN
- printk(KERN_INFO "rocket mod++ = %d...\n",
- atomic_read(&rp_num_ports_open));
-#endif
- }
-#ifdef ROCKET_DEBUG_OPEN
- printk(KERN_INFO "rp_open ttyR%d, count=%d\n", info->line, info->port.count);
-#endif
-
- /*
- * Info->count is now 1; so it's safe to sleep now.
- */
- if (!test_bit(ASYNCB_INITIALIZED, &port->flags)) {
- cp = &info->channel;
- sSetRxTrigger(cp, TRIG_1);
- if (sGetChanStatus(cp) & CD_ACT)
- info->cd_status = 1;
- else
- info->cd_status = 0;
- sDisRxStatusMode(cp);
- sFlushRxFIFO(cp);
- sFlushTxFIFO(cp);
-
- sEnInterrupts(cp, (TXINT_EN | MCINT_EN | RXINT_EN | SRCINT_EN | CHANINT_EN));
- sSetRxTrigger(cp, TRIG_1);
-
- sGetChanStatus(cp);
- sDisRxStatusMode(cp);
- sClrTxXOFF(cp);
-
- sDisCTSFlowCtl(cp);
- sDisTxSoftFlowCtl(cp);
-
- sEnRxFIFO(cp);
- sEnTransmit(cp);
-
- set_bit(ASYNCB_INITIALIZED, &info->port.flags);
-
- /*
- * Set up the tty->alt_speed kludge
- */
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
- tty->alt_speed = 57600;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
- tty->alt_speed = 115200;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
- tty->alt_speed = 230400;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
- tty->alt_speed = 460800;
-
- configure_r_port(tty, info, NULL);
- if (tty->termios->c_cflag & CBAUD) {
- sSetDTR(cp);
- sSetRTS(cp);
- }
- }
- /* Starts (or resets) the maint polling loop */
- mod_timer(&rocket_timer, jiffies + POLL_PERIOD);
-
- retval = tty_port_block_til_ready(port, tty, filp);
- if (retval) {
-#ifdef ROCKET_DEBUG_OPEN
- printk(KERN_INFO "rp_open returning after block_til_ready with %d\n", retval);
-#endif
- return retval;
- }
- return 0;
-}
-
-/*
- * Exception handler that closes a serial port. info->port.count is considered critical.
- */
-static void rp_close(struct tty_struct *tty, struct file *filp)
-{
- struct r_port *info = tty->driver_data;
- struct tty_port *port = &info->port;
- int timeout;
- CHANNEL_t *cp;
-
- if (rocket_paranoia_check(info, "rp_close"))
- return;
-
-#ifdef ROCKET_DEBUG_OPEN
- printk(KERN_INFO "rp_close ttyR%d, count = %d\n", info->line, info->port.count);
-#endif
-
- if (tty_port_close_start(port, tty, filp) == 0)
- return;
-
- mutex_lock(&port->mutex);
- cp = &info->channel;
- /*
- * Before we drop DTR, make sure the UART transmitter
- * has completely drained; this is especially
- * important if there is a transmit FIFO!
- */
- timeout = (sGetTxCnt(cp) + 1) * HZ / info->cps;
- if (timeout == 0)
- timeout = 1;
- rp_wait_until_sent(tty, timeout);
- clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
-
- sDisTransmit(cp);
- sDisInterrupts(cp, (TXINT_EN | MCINT_EN | RXINT_EN | SRCINT_EN | CHANINT_EN));
- sDisCTSFlowCtl(cp);
- sDisTxSoftFlowCtl(cp);
- sClrTxXOFF(cp);
- sFlushRxFIFO(cp);
- sFlushTxFIFO(cp);
- sClrRTS(cp);
- if (C_HUPCL(tty))
- sClrDTR(cp);
-
- rp_flush_buffer(tty);
-
- tty_ldisc_flush(tty);
-
- clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
-
- /* We can't yet use tty_port_close_end as the buffer handling in this
- driver is a bit different to the usual */
-
- if (port->blocked_open) {
- if (port->close_delay) {
- msleep_interruptible(jiffies_to_msecs(port->close_delay));
- }
- wake_up_interruptible(&port->open_wait);
- } else {
- if (info->xmit_buf) {
- free_page((unsigned long) info->xmit_buf);
- info->xmit_buf = NULL;
- }
- }
- spin_lock_irq(&port->lock);
- info->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_CLOSING | ASYNC_NORMAL_ACTIVE);
- tty->closing = 0;
- spin_unlock_irq(&port->lock);
- mutex_unlock(&port->mutex);
- tty_port_tty_set(port, NULL);
-
- wake_up_interruptible(&port->close_wait);
- complete_all(&info->close_wait);
- atomic_dec(&rp_num_ports_open);
-
-#ifdef ROCKET_DEBUG_OPEN
- printk(KERN_INFO "rocket mod-- = %d...\n",
- atomic_read(&rp_num_ports_open));
- printk(KERN_INFO "rp_close ttyR%d complete shutdown\n", info->line);
-#endif
-
-}
-
-static void rp_set_termios(struct tty_struct *tty,
- struct ktermios *old_termios)
-{
- struct r_port *info = tty->driver_data;
- CHANNEL_t *cp;
- unsigned cflag;
-
- if (rocket_paranoia_check(info, "rp_set_termios"))
- return;
-
- cflag = tty->termios->c_cflag;
-
- /*
- * This driver doesn't support CS5 or CS6
- */
- if (((cflag & CSIZE) == CS5) || ((cflag & CSIZE) == CS6))
- tty->termios->c_cflag =
- ((cflag & ~CSIZE) | (old_termios->c_cflag & CSIZE));
- /* Or CMSPAR */
- tty->termios->c_cflag &= ~CMSPAR;
-
- configure_r_port(tty, info, old_termios);
-
- cp = &info->channel;
-
- /* Handle transition to B0 status */
- if ((old_termios->c_cflag & CBAUD) && !(tty->termios->c_cflag & CBAUD)) {
- sClrDTR(cp);
- sClrRTS(cp);
- }
-
- /* Handle transition away from B0 status */
- if (!(old_termios->c_cflag & CBAUD) && (tty->termios->c_cflag & CBAUD)) {
- if (!tty->hw_stopped || !(tty->termios->c_cflag & CRTSCTS))
- sSetRTS(cp);
- sSetDTR(cp);
- }
-
- if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- rp_start(tty);
- }
-}
-
-static int rp_break(struct tty_struct *tty, int break_state)
-{
- struct r_port *info = tty->driver_data;
- unsigned long flags;
-
- if (rocket_paranoia_check(info, "rp_break"))
- return -EINVAL;
-
- spin_lock_irqsave(&info->slock, flags);
- if (break_state == -1)
- sSendBreak(&info->channel);
- else
- sClrBreak(&info->channel);
- spin_unlock_irqrestore(&info->slock, flags);
- return 0;
-}
-
-/*
- * sGetChanRI used to be a macro in rocket_int.h. When the functionality for
- * the UPCI boards was added, it was decided to make this a function because
- * the macro was getting too complicated. All cases except the first one
- * (UPCIRingInd) are taken directly from the original macro.
- */
-static int sGetChanRI(CHANNEL_T * ChP)
-{
- CONTROLLER_t *CtlP = ChP->CtlP;
- int ChanNum = ChP->ChanNum;
- int RingInd = 0;
-
- if (CtlP->UPCIRingInd)
- RingInd = !(sInB(CtlP->UPCIRingInd) & sBitMapSetTbl[ChanNum]);
- else if (CtlP->AltChanRingIndicator)
- RingInd = sInB((ByteIO_t) (ChP->ChanStat + 8)) & DSR_ACT;
- else if (CtlP->boardType == ROCKET_TYPE_PC104)
- RingInd = !(sInB(CtlP->AiopIO[3]) & sBitMapSetTbl[ChanNum]);
-
- return RingInd;
-}
-
-/********************************************************************************************/
-/* Here are the routines used by rp_ioctl. These are all called from exception handlers. */
-
-/*
- * Returns the state of the serial modem control lines. These next 2 functions
- * are the way kernel versions > 2.5 handle modem control lines rather than IOCTLs.
- */
-static int rp_tiocmget(struct tty_struct *tty)
-{
- struct r_port *info = tty->driver_data;
- unsigned int control, result, ChanStatus;
-
- ChanStatus = sGetChanStatusLo(&info->channel);
- control = info->channel.TxControl[3];
- result = ((control & SET_RTS) ? TIOCM_RTS : 0) |
- ((control & SET_DTR) ? TIOCM_DTR : 0) |
- ((ChanStatus & CD_ACT) ? TIOCM_CAR : 0) |
- (sGetChanRI(&info->channel) ? TIOCM_RNG : 0) |
- ((ChanStatus & DSR_ACT) ? TIOCM_DSR : 0) |
- ((ChanStatus & CTS_ACT) ? TIOCM_CTS : 0);
-
- return result;
-}
-
-/*
- * Sets the modem control lines
- */
-static int rp_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- struct r_port *info = tty->driver_data;
-
- if (set & TIOCM_RTS)
- info->channel.TxControl[3] |= SET_RTS;
- if (set & TIOCM_DTR)
- info->channel.TxControl[3] |= SET_DTR;
- if (clear & TIOCM_RTS)
- info->channel.TxControl[3] &= ~SET_RTS;
- if (clear & TIOCM_DTR)
- info->channel.TxControl[3] &= ~SET_DTR;
-
- out32(info->channel.IndexAddr, info->channel.TxControl);
- return 0;
-}
-
-static int get_config(struct r_port *info, struct rocket_config __user *retinfo)
-{
- struct rocket_config tmp;
-
- if (!retinfo)
- return -EFAULT;
- memset(&tmp, 0, sizeof (tmp));
- mutex_lock(&info->port.mutex);
- tmp.line = info->line;
- tmp.flags = info->flags;
- tmp.close_delay = info->port.close_delay;
- tmp.closing_wait = info->port.closing_wait;
- tmp.port = rcktpt_io_addr[(info->line >> 5) & 3];
- mutex_unlock(&info->port.mutex);
-
- if (copy_to_user(retinfo, &tmp, sizeof (*retinfo)))
- return -EFAULT;
- return 0;
-}
-
-static int set_config(struct tty_struct *tty, struct r_port *info,
- struct rocket_config __user *new_info)
-{
- struct rocket_config new_serial;
-
- if (copy_from_user(&new_serial, new_info, sizeof (new_serial)))
- return -EFAULT;
-
- mutex_lock(&info->port.mutex);
- if (!capable(CAP_SYS_ADMIN))
- {
- if ((new_serial.flags & ~ROCKET_USR_MASK) != (info->flags & ~ROCKET_USR_MASK)) {
- mutex_unlock(&info->port.mutex);
- return -EPERM;
- }
- info->flags = ((info->flags & ~ROCKET_USR_MASK) | (new_serial.flags & ROCKET_USR_MASK));
- configure_r_port(tty, info, NULL);
- mutex_unlock(&info->port.mutex);
- return 0;
- }
-
- info->flags = ((info->flags & ~ROCKET_FLAGS) | (new_serial.flags & ROCKET_FLAGS));
- info->port.close_delay = new_serial.close_delay;
- info->port.closing_wait = new_serial.closing_wait;
-
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
- tty->alt_speed = 57600;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
- tty->alt_speed = 115200;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
- tty->alt_speed = 230400;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
- tty->alt_speed = 460800;
- mutex_unlock(&info->port.mutex);
-
- configure_r_port(tty, info, NULL);
- return 0;
-}
-
-/*
- * This function fills in a rocket_ports struct with information
- * about what boards/ports are in the system. This info is passed
- * to user space. See setrocket.c where the info is used to create
- * the /dev/ttyRx ports.
- */
-static int get_ports(struct r_port *info, struct rocket_ports __user *retports)
-{
- struct rocket_ports tmp;
- int board;
-
- if (!retports)
- return -EFAULT;
- memset(&tmp, 0, sizeof (tmp));
- tmp.tty_major = rocket_driver->major;
-
- for (board = 0; board < 4; board++) {
- tmp.rocketModel[board].model = rocketModel[board].model;
- strcpy(tmp.rocketModel[board].modelString, rocketModel[board].modelString);
- tmp.rocketModel[board].numPorts = rocketModel[board].numPorts;
- tmp.rocketModel[board].loadrm2 = rocketModel[board].loadrm2;
- tmp.rocketModel[board].startingPortNumber = rocketModel[board].startingPortNumber;
- }
- if (copy_to_user(retports, &tmp, sizeof (*retports)))
- return -EFAULT;
- return 0;
-}
-
-static int reset_rm2(struct r_port *info, void __user *arg)
-{
- int reset;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- if (copy_from_user(&reset, arg, sizeof (int)))
- return -EFAULT;
- if (reset)
- reset = 1;
-
- if (rcktpt_type[info->board] != ROCKET_TYPE_MODEMII &&
- rcktpt_type[info->board] != ROCKET_TYPE_MODEMIII)
- return -EINVAL;
-
- if (info->ctlp->BusType == isISA)
- sModemReset(info->ctlp, info->chan, reset);
- else
- sPCIModemReset(info->ctlp, info->chan, reset);
-
- return 0;
-}
-
-static int get_version(struct r_port *info, struct rocket_version __user *retvers)
-{
- if (copy_to_user(retvers, &driver_version, sizeof (*retvers)))
- return -EFAULT;
- return 0;
-}
-
-/* IOCTL call handler into the driver */
-static int rp_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct r_port *info = tty->driver_data;
- void __user *argp = (void __user *)arg;
- int ret = 0;
-
- if (cmd != RCKP_GET_PORTS && rocket_paranoia_check(info, "rp_ioctl"))
- return -ENXIO;
-
- switch (cmd) {
- case RCKP_GET_STRUCT:
- if (copy_to_user(argp, info, sizeof (struct r_port)))
- ret = -EFAULT;
- break;
- case RCKP_GET_CONFIG:
- ret = get_config(info, argp);
- break;
- case RCKP_SET_CONFIG:
- ret = set_config(tty, info, argp);
- break;
- case RCKP_GET_PORTS:
- ret = get_ports(info, argp);
- break;
- case RCKP_RESET_RM2:
- ret = reset_rm2(info, argp);
- break;
- case RCKP_GET_VERSION:
- ret = get_version(info, argp);
- break;
- default:
- ret = -ENOIOCTLCMD;
- }
- return ret;
-}
-
-static void rp_send_xchar(struct tty_struct *tty, char ch)
-{
- struct r_port *info = tty->driver_data;
- CHANNEL_t *cp;
-
- if (rocket_paranoia_check(info, "rp_send_xchar"))
- return;
-
- cp = &info->channel;
- if (sGetTxCnt(cp))
- sWriteTxPrioByte(cp, ch);
- else
- sWriteTxByte(sGetTxRxDataIO(cp), ch);
-}
-
-static void rp_throttle(struct tty_struct *tty)
-{
- struct r_port *info = tty->driver_data;
- CHANNEL_t *cp;
-
-#ifdef ROCKET_DEBUG_THROTTLE
- printk(KERN_INFO "throttle %s: %d....\n", tty->name,
- tty->ldisc.chars_in_buffer(tty));
-#endif
-
- if (rocket_paranoia_check(info, "rp_throttle"))
- return;
-
- cp = &info->channel;
- if (I_IXOFF(tty))
- rp_send_xchar(tty, STOP_CHAR(tty));
-
- sClrRTS(&info->channel);
-}
-
-static void rp_unthrottle(struct tty_struct *tty)
-{
- struct r_port *info = tty->driver_data;
- CHANNEL_t *cp;
-#ifdef ROCKET_DEBUG_THROTTLE
- printk(KERN_INFO "unthrottle %s: %d....\n", tty->name,
- tty->ldisc.chars_in_buffer(tty));
-#endif
-
- if (rocket_paranoia_check(info, "rp_throttle"))
- return;
-
- cp = &info->channel;
- if (I_IXOFF(tty))
- rp_send_xchar(tty, START_CHAR(tty));
-
- sSetRTS(&info->channel);
-}
-
-/*
- * ------------------------------------------------------------
- * rp_stop() and rp_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- * ------------------------------------------------------------
- */
-static void rp_stop(struct tty_struct *tty)
-{
- struct r_port *info = tty->driver_data;
-
-#ifdef ROCKET_DEBUG_FLOW
- printk(KERN_INFO "stop %s: %d %d....\n", tty->name,
- info->xmit_cnt, info->xmit_fifo_room);
-#endif
-
- if (rocket_paranoia_check(info, "rp_stop"))
- return;
-
- if (sGetTxCnt(&info->channel))
- sDisTransmit(&info->channel);
-}
-
-static void rp_start(struct tty_struct *tty)
-{
- struct r_port *info = tty->driver_data;
-
-#ifdef ROCKET_DEBUG_FLOW
- printk(KERN_INFO "start %s: %d %d....\n", tty->name,
- info->xmit_cnt, info->xmit_fifo_room);
-#endif
-
- if (rocket_paranoia_check(info, "rp_stop"))
- return;
-
- sEnTransmit(&info->channel);
- set_bit((info->aiop * 8) + info->chan,
- (void *) &xmit_flags[info->board]);
-}
-
-/*
- * rp_wait_until_sent() --- wait until the transmitter is empty
- */
-static void rp_wait_until_sent(struct tty_struct *tty, int timeout)
-{
- struct r_port *info = tty->driver_data;
- CHANNEL_t *cp;
- unsigned long orig_jiffies;
- int check_time, exit_time;
- int txcnt;
-
- if (rocket_paranoia_check(info, "rp_wait_until_sent"))
- return;
-
- cp = &info->channel;
-
- orig_jiffies = jiffies;
-#ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT
- printk(KERN_INFO "In RP_wait_until_sent(%d) (jiff=%lu)...\n", timeout,
- jiffies);
- printk(KERN_INFO "cps=%d...\n", info->cps);
-#endif
- while (1) {
- txcnt = sGetTxCnt(cp);
- if (!txcnt) {
- if (sGetChanStatusLo(cp) & TXSHRMT)
- break;
- check_time = (HZ / info->cps) / 5;
- } else {
- check_time = HZ * txcnt / info->cps;
- }
- if (timeout) {
- exit_time = orig_jiffies + timeout - jiffies;
- if (exit_time <= 0)
- break;
- if (exit_time < check_time)
- check_time = exit_time;
- }
- if (check_time == 0)
- check_time = 1;
-#ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT
- printk(KERN_INFO "txcnt = %d (jiff=%lu,check=%d)...\n", txcnt,
- jiffies, check_time);
-#endif
- msleep_interruptible(jiffies_to_msecs(check_time));
- if (signal_pending(current))
- break;
- }
- __set_current_state(TASK_RUNNING);
-#ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT
- printk(KERN_INFO "txcnt = %d (jiff=%lu)...done\n", txcnt, jiffies);
-#endif
-}
-
-/*
- * rp_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
-static void rp_hangup(struct tty_struct *tty)
-{
- CHANNEL_t *cp;
- struct r_port *info = tty->driver_data;
- unsigned long flags;
-
- if (rocket_paranoia_check(info, "rp_hangup"))
- return;
-
-#if (defined(ROCKET_DEBUG_OPEN) || defined(ROCKET_DEBUG_HANGUP))
- printk(KERN_INFO "rp_hangup of ttyR%d...\n", info->line);
-#endif
- rp_flush_buffer(tty);
- spin_lock_irqsave(&info->port.lock, flags);
- if (info->port.flags & ASYNC_CLOSING) {
- spin_unlock_irqrestore(&info->port.lock, flags);
- return;
- }
- if (info->port.count)
- atomic_dec(&rp_num_ports_open);
- clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
- spin_unlock_irqrestore(&info->port.lock, flags);
-
- tty_port_hangup(&info->port);
-
- cp = &info->channel;
- sDisRxFIFO(cp);
- sDisTransmit(cp);
- sDisInterrupts(cp, (TXINT_EN | MCINT_EN | RXINT_EN | SRCINT_EN | CHANINT_EN));
- sDisCTSFlowCtl(cp);
- sDisTxSoftFlowCtl(cp);
- sClrTxXOFF(cp);
- clear_bit(ASYNCB_INITIALIZED, &info->port.flags);
-
- wake_up_interruptible(&info->port.open_wait);
-}
-
-/*
- * Exception handler - write char routine. The RocketPort driver uses a
- * double-buffering strategy, with the twist that if the in-memory CPU
- * buffer is empty, and there's space in the transmit FIFO, the
- * writing routines will write directly to transmit FIFO.
- * Write buffer and counters protected by spinlocks
- */
-static int rp_put_char(struct tty_struct *tty, unsigned char ch)
-{
- struct r_port *info = tty->driver_data;
- CHANNEL_t *cp;
- unsigned long flags;
-
- if (rocket_paranoia_check(info, "rp_put_char"))
- return 0;
-
- /*
- * Grab the port write mutex, locking out other processes that try to
- * write to this port
- */
- mutex_lock(&info->write_mtx);
-
-#ifdef ROCKET_DEBUG_WRITE
- printk(KERN_INFO "rp_put_char %c...\n", ch);
-#endif
-
- spin_lock_irqsave(&info->slock, flags);
- cp = &info->channel;
-
- if (!tty->stopped && !tty->hw_stopped && info->xmit_fifo_room == 0)
- info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
-
- if (tty->stopped || tty->hw_stopped || info->xmit_fifo_room == 0 || info->xmit_cnt != 0) {
- info->xmit_buf[info->xmit_head++] = ch;
- info->xmit_head &= XMIT_BUF_SIZE - 1;
- info->xmit_cnt++;
- set_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
- } else {
- sOutB(sGetTxRxDataIO(cp), ch);
- info->xmit_fifo_room--;
- }
- spin_unlock_irqrestore(&info->slock, flags);
- mutex_unlock(&info->write_mtx);
- return 1;
-}
-
-/*
- * Exception handler - write routine, called when user app writes to the device.
- * A per port write mutex is used to protect from another process writing to
- * this port at the same time. This other process could be running on the other CPU
- * or get control of the CPU if the copy_from_user() blocks due to a page fault (swapped out).
- * Spinlocks protect the info xmit members.
- */
-static int rp_write(struct tty_struct *tty,
- const unsigned char *buf, int count)
-{
- struct r_port *info = tty->driver_data;
- CHANNEL_t *cp;
- const unsigned char *b;
- int c, retval = 0;
- unsigned long flags;
-
- if (count <= 0 || rocket_paranoia_check(info, "rp_write"))
- return 0;
-
- if (mutex_lock_interruptible(&info->write_mtx))
- return -ERESTARTSYS;
-
-#ifdef ROCKET_DEBUG_WRITE
- printk(KERN_INFO "rp_write %d chars...\n", count);
-#endif
- cp = &info->channel;
-
- if (!tty->stopped && !tty->hw_stopped && info->xmit_fifo_room < count)
- info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
-
- /*
- * If the write queue for the port is empty, and there is FIFO space, stuff bytes
- * into FIFO. Use the write queue for temp storage.
- */
- if (!tty->stopped && !tty->hw_stopped && info->xmit_cnt == 0 && info->xmit_fifo_room > 0) {
- c = min(count, info->xmit_fifo_room);
- b = buf;
-
- /* Push data into FIFO, 2 bytes at a time */
- sOutStrW(sGetTxRxDataIO(cp), (unsigned short *) b, c / 2);
-
- /* If there is a byte remaining, write it */
- if (c & 1)
- sOutB(sGetTxRxDataIO(cp), b[c - 1]);
-
- retval += c;
- buf += c;
- count -= c;
-
- spin_lock_irqsave(&info->slock, flags);
- info->xmit_fifo_room -= c;
- spin_unlock_irqrestore(&info->slock, flags);
- }
-
- /* If count is zero, we wrote it all and are done */
- if (!count)
- goto end;
-
- /* Write remaining data into the port's xmit_buf */
- while (1) {
- /* Hung up ? */
- if (!test_bit(ASYNCB_NORMAL_ACTIVE, &info->port.flags))
- goto end;
- c = min(count, XMIT_BUF_SIZE - info->xmit_cnt - 1);
- c = min(c, XMIT_BUF_SIZE - info->xmit_head);
- if (c <= 0)
- break;
-
- b = buf;
- memcpy(info->xmit_buf + info->xmit_head, b, c);
-
- spin_lock_irqsave(&info->slock, flags);
- info->xmit_head =
- (info->xmit_head + c) & (XMIT_BUF_SIZE - 1);
- info->xmit_cnt += c;
- spin_unlock_irqrestore(&info->slock, flags);
-
- buf += c;
- count -= c;
- retval += c;
- }
-
- if ((retval > 0) && !tty->stopped && !tty->hw_stopped)
- set_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
-
-end:
- if (info->xmit_cnt < WAKEUP_CHARS) {
- tty_wakeup(tty);
-#ifdef ROCKETPORT_HAVE_POLL_WAIT
- wake_up_interruptible(&tty->poll_wait);
-#endif
- }
- mutex_unlock(&info->write_mtx);
- return retval;
-}
-
-/*
- * Return the number of characters that can be sent. We estimate
- * only using the in-memory transmit buffer only, and ignore the
- * potential space in the transmit FIFO.
- */
-static int rp_write_room(struct tty_struct *tty)
-{
- struct r_port *info = tty->driver_data;
- int ret;
-
- if (rocket_paranoia_check(info, "rp_write_room"))
- return 0;
-
- ret = XMIT_BUF_SIZE - info->xmit_cnt - 1;
- if (ret < 0)
- ret = 0;
-#ifdef ROCKET_DEBUG_WRITE
- printk(KERN_INFO "rp_write_room returns %d...\n", ret);
-#endif
- return ret;
-}
-
-/*
- * Return the number of characters in the buffer. Again, this only
- * counts those characters in the in-memory transmit buffer.
- */
-static int rp_chars_in_buffer(struct tty_struct *tty)
-{
- struct r_port *info = tty->driver_data;
- CHANNEL_t *cp;
-
- if (rocket_paranoia_check(info, "rp_chars_in_buffer"))
- return 0;
-
- cp = &info->channel;
-
-#ifdef ROCKET_DEBUG_WRITE
- printk(KERN_INFO "rp_chars_in_buffer returns %d...\n", info->xmit_cnt);
-#endif
- return info->xmit_cnt;
-}
-
-/*
- * Flushes the TX fifo for a port, deletes data in the xmit_buf stored in the
- * r_port struct for the port. Note that spinlock are used to protect info members,
- * do not call this function if the spinlock is already held.
- */
-static void rp_flush_buffer(struct tty_struct *tty)
-{
- struct r_port *info = tty->driver_data;
- CHANNEL_t *cp;
- unsigned long flags;
-
- if (rocket_paranoia_check(info, "rp_flush_buffer"))
- return;
-
- spin_lock_irqsave(&info->slock, flags);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
- spin_unlock_irqrestore(&info->slock, flags);
-
-#ifdef ROCKETPORT_HAVE_POLL_WAIT
- wake_up_interruptible(&tty->poll_wait);
-#endif
- tty_wakeup(tty);
-
- cp = &info->channel;
- sFlushTxFIFO(cp);
-}
-
-#ifdef CONFIG_PCI
-
-static struct pci_device_id __devinitdata __used rocket_pci_ids[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_RP, PCI_ANY_ID) },
- { }
-};
-MODULE_DEVICE_TABLE(pci, rocket_pci_ids);
-
-/*
- * Called when a PCI card is found. Retrieves and stores model information,
- * init's aiopic and serial port hardware.
- * Inputs: i is the board number (0-n)
- */
-static __init int register_PCI(int i, struct pci_dev *dev)
-{
- int num_aiops, aiop, max_num_aiops, num_chan, chan;
- unsigned int aiopio[MAX_AIOPS_PER_BOARD];
- char *str, *board_type;
- CONTROLLER_t *ctlp;
-
- int fast_clock = 0;
- int altChanRingIndicator = 0;
- int ports_per_aiop = 8;
- WordIO_t ConfigIO = 0;
- ByteIO_t UPCIRingInd = 0;
-
- if (!dev || pci_enable_device(dev))
- return 0;
-
- rcktpt_io_addr[i] = pci_resource_start(dev, 0);
-
- rcktpt_type[i] = ROCKET_TYPE_NORMAL;
- rocketModel[i].loadrm2 = 0;
- rocketModel[i].startingPortNumber = nextLineNumber;
-
- /* Depending on the model, set up some config variables */
- switch (dev->device) {
- case PCI_DEVICE_ID_RP4QUAD:
- str = "Quadcable";
- max_num_aiops = 1;
- ports_per_aiop = 4;
- rocketModel[i].model = MODEL_RP4QUAD;
- strcpy(rocketModel[i].modelString, "RocketPort 4 port w/quad cable");
- rocketModel[i].numPorts = 4;
- break;
- case PCI_DEVICE_ID_RP8OCTA:
- str = "Octacable";
- max_num_aiops = 1;
- rocketModel[i].model = MODEL_RP8OCTA;
- strcpy(rocketModel[i].modelString, "RocketPort 8 port w/octa cable");
- rocketModel[i].numPorts = 8;
- break;
- case PCI_DEVICE_ID_URP8OCTA:
- str = "Octacable";
- max_num_aiops = 1;
- rocketModel[i].model = MODEL_UPCI_RP8OCTA;
- strcpy(rocketModel[i].modelString, "RocketPort UPCI 8 port w/octa cable");
- rocketModel[i].numPorts = 8;
- break;
- case PCI_DEVICE_ID_RP8INTF:
- str = "8";
- max_num_aiops = 1;
- rocketModel[i].model = MODEL_RP8INTF;
- strcpy(rocketModel[i].modelString, "RocketPort 8 port w/external I/F");
- rocketModel[i].numPorts = 8;
- break;
- case PCI_DEVICE_ID_URP8INTF:
- str = "8";
- max_num_aiops = 1;
- rocketModel[i].model = MODEL_UPCI_RP8INTF;
- strcpy(rocketModel[i].modelString, "RocketPort UPCI 8 port w/external I/F");
- rocketModel[i].numPorts = 8;
- break;
- case PCI_DEVICE_ID_RP8J:
- str = "8J";
- max_num_aiops = 1;
- rocketModel[i].model = MODEL_RP8J;
- strcpy(rocketModel[i].modelString, "RocketPort 8 port w/RJ11 connectors");
- rocketModel[i].numPorts = 8;
- break;
- case PCI_DEVICE_ID_RP4J:
- str = "4J";
- max_num_aiops = 1;
- ports_per_aiop = 4;
- rocketModel[i].model = MODEL_RP4J;
- strcpy(rocketModel[i].modelString, "RocketPort 4 port w/RJ45 connectors");
- rocketModel[i].numPorts = 4;
- break;
- case PCI_DEVICE_ID_RP8SNI:
- str = "8 (DB78 Custom)";
- max_num_aiops = 1;
- rocketModel[i].model = MODEL_RP8SNI;
- strcpy(rocketModel[i].modelString, "RocketPort 8 port w/ custom DB78");
- rocketModel[i].numPorts = 8;
- break;
- case PCI_DEVICE_ID_RP16SNI:
- str = "16 (DB78 Custom)";
- max_num_aiops = 2;
- rocketModel[i].model = MODEL_RP16SNI;
- strcpy(rocketModel[i].modelString, "RocketPort 16 port w/ custom DB78");
- rocketModel[i].numPorts = 16;
- break;
- case PCI_DEVICE_ID_RP16INTF:
- str = "16";
- max_num_aiops = 2;
- rocketModel[i].model = MODEL_RP16INTF;
- strcpy(rocketModel[i].modelString, "RocketPort 16 port w/external I/F");
- rocketModel[i].numPorts = 16;
- break;
- case PCI_DEVICE_ID_URP16INTF:
- str = "16";
- max_num_aiops = 2;
- rocketModel[i].model = MODEL_UPCI_RP16INTF;
- strcpy(rocketModel[i].modelString, "RocketPort UPCI 16 port w/external I/F");
- rocketModel[i].numPorts = 16;
- break;
- case PCI_DEVICE_ID_CRP16INTF:
- str = "16";
- max_num_aiops = 2;
- rocketModel[i].model = MODEL_CPCI_RP16INTF;
- strcpy(rocketModel[i].modelString, "RocketPort Compact PCI 16 port w/external I/F");
- rocketModel[i].numPorts = 16;
- break;
- case PCI_DEVICE_ID_RP32INTF:
- str = "32";
- max_num_aiops = 4;
- rocketModel[i].model = MODEL_RP32INTF;
- strcpy(rocketModel[i].modelString, "RocketPort 32 port w/external I/F");
- rocketModel[i].numPorts = 32;
- break;
- case PCI_DEVICE_ID_URP32INTF:
- str = "32";
- max_num_aiops = 4;
- rocketModel[i].model = MODEL_UPCI_RP32INTF;
- strcpy(rocketModel[i].modelString, "RocketPort UPCI 32 port w/external I/F");
- rocketModel[i].numPorts = 32;
- break;
- case PCI_DEVICE_ID_RPP4:
- str = "Plus Quadcable";
- max_num_aiops = 1;
- ports_per_aiop = 4;
- altChanRingIndicator++;
- fast_clock++;
- rocketModel[i].model = MODEL_RPP4;
- strcpy(rocketModel[i].modelString, "RocketPort Plus 4 port");
- rocketModel[i].numPorts = 4;
- break;
- case PCI_DEVICE_ID_RPP8:
- str = "Plus Octacable";
- max_num_aiops = 2;
- ports_per_aiop = 4;
- altChanRingIndicator++;
- fast_clock++;
- rocketModel[i].model = MODEL_RPP8;
- strcpy(rocketModel[i].modelString, "RocketPort Plus 8 port");
- rocketModel[i].numPorts = 8;
- break;
- case PCI_DEVICE_ID_RP2_232:
- str = "Plus 2 (RS-232)";
- max_num_aiops = 1;
- ports_per_aiop = 2;
- altChanRingIndicator++;
- fast_clock++;
- rocketModel[i].model = MODEL_RP2_232;
- strcpy(rocketModel[i].modelString, "RocketPort Plus 2 port RS232");
- rocketModel[i].numPorts = 2;
- break;
- case PCI_DEVICE_ID_RP2_422:
- str = "Plus 2 (RS-422)";
- max_num_aiops = 1;
- ports_per_aiop = 2;
- altChanRingIndicator++;
- fast_clock++;
- rocketModel[i].model = MODEL_RP2_422;
- strcpy(rocketModel[i].modelString, "RocketPort Plus 2 port RS422");
- rocketModel[i].numPorts = 2;
- break;
- case PCI_DEVICE_ID_RP6M:
-
- max_num_aiops = 1;
- ports_per_aiop = 6;
- str = "6-port";
-
- /* If revision is 1, the rocketmodem flash must be loaded.
- * If it is 2 it is a "socketed" version. */
- if (dev->revision == 1) {
- rcktpt_type[i] = ROCKET_TYPE_MODEMII;
- rocketModel[i].loadrm2 = 1;
- } else {
- rcktpt_type[i] = ROCKET_TYPE_MODEM;
- }
-
- rocketModel[i].model = MODEL_RP6M;
- strcpy(rocketModel[i].modelString, "RocketModem 6 port");
- rocketModel[i].numPorts = 6;
- break;
- case PCI_DEVICE_ID_RP4M:
- max_num_aiops = 1;
- ports_per_aiop = 4;
- str = "4-port";
- if (dev->revision == 1) {
- rcktpt_type[i] = ROCKET_TYPE_MODEMII;
- rocketModel[i].loadrm2 = 1;
- } else {
- rcktpt_type[i] = ROCKET_TYPE_MODEM;
- }
-
- rocketModel[i].model = MODEL_RP4M;
- strcpy(rocketModel[i].modelString, "RocketModem 4 port");
- rocketModel[i].numPorts = 4;
- break;
- default:
- str = "(unknown/unsupported)";
- max_num_aiops = 0;
- break;
- }
-
- /*
- * Check for UPCI boards.
- */
-
- switch (dev->device) {
- case PCI_DEVICE_ID_URP32INTF:
- case PCI_DEVICE_ID_URP8INTF:
- case PCI_DEVICE_ID_URP16INTF:
- case PCI_DEVICE_ID_CRP16INTF:
- case PCI_DEVICE_ID_URP8OCTA:
- rcktpt_io_addr[i] = pci_resource_start(dev, 2);
- ConfigIO = pci_resource_start(dev, 1);
- if (dev->device == PCI_DEVICE_ID_URP8OCTA) {
- UPCIRingInd = rcktpt_io_addr[i] + _PCI_9030_RING_IND;
-
- /*
- * Check for octa or quad cable.
- */
- if (!
- (sInW(ConfigIO + _PCI_9030_GPIO_CTRL) &
- PCI_GPIO_CTRL_8PORT)) {
- str = "Quadcable";
- ports_per_aiop = 4;
- rocketModel[i].numPorts = 4;
- }
- }
- break;
- case PCI_DEVICE_ID_UPCI_RM3_8PORT:
- str = "8 ports";
- max_num_aiops = 1;
- rocketModel[i].model = MODEL_UPCI_RM3_8PORT;
- strcpy(rocketModel[i].modelString, "RocketModem III 8 port");
- rocketModel[i].numPorts = 8;
- rcktpt_io_addr[i] = pci_resource_start(dev, 2);
- UPCIRingInd = rcktpt_io_addr[i] + _PCI_9030_RING_IND;
- ConfigIO = pci_resource_start(dev, 1);
- rcktpt_type[i] = ROCKET_TYPE_MODEMIII;
- break;
- case PCI_DEVICE_ID_UPCI_RM3_4PORT:
- str = "4 ports";
- max_num_aiops = 1;
- rocketModel[i].model = MODEL_UPCI_RM3_4PORT;
- strcpy(rocketModel[i].modelString, "RocketModem III 4 port");
- rocketModel[i].numPorts = 4;
- rcktpt_io_addr[i] = pci_resource_start(dev, 2);
- UPCIRingInd = rcktpt_io_addr[i] + _PCI_9030_RING_IND;
- ConfigIO = pci_resource_start(dev, 1);
- rcktpt_type[i] = ROCKET_TYPE_MODEMIII;
- break;
- default:
- break;
- }
-
- switch (rcktpt_type[i]) {
- case ROCKET_TYPE_MODEM:
- board_type = "RocketModem";
- break;
- case ROCKET_TYPE_MODEMII:
- board_type = "RocketModem II";
- break;
- case ROCKET_TYPE_MODEMIII:
- board_type = "RocketModem III";
- break;
- default:
- board_type = "RocketPort";
- break;
- }
-
- if (fast_clock) {
- sClockPrescale = 0x12; /* mod 2 (divide by 3) */
- rp_baud_base[i] = 921600;
- } else {
- /*
- * If support_low_speed is set, use the slow clock
- * prescale, which supports 50 bps
- */
- if (support_low_speed) {
- /* mod 9 (divide by 10) prescale */
- sClockPrescale = 0x19;
- rp_baud_base[i] = 230400;
- } else {
- /* mod 4 (devide by 5) prescale */
- sClockPrescale = 0x14;
- rp_baud_base[i] = 460800;
- }
- }
-
- for (aiop = 0; aiop < max_num_aiops; aiop++)
- aiopio[aiop] = rcktpt_io_addr[i] + (aiop * 0x40);
- ctlp = sCtlNumToCtlPtr(i);
- num_aiops = sPCIInitController(ctlp, i, aiopio, max_num_aiops, ConfigIO, 0, FREQ_DIS, 0, altChanRingIndicator, UPCIRingInd);
- for (aiop = 0; aiop < max_num_aiops; aiop++)
- ctlp->AiopNumChan[aiop] = ports_per_aiop;
-
- dev_info(&dev->dev, "comtrol PCI controller #%d found at "
- "address %04lx, %d AIOP(s) (%s), creating ttyR%d - %ld\n",
- i, rcktpt_io_addr[i], num_aiops, rocketModel[i].modelString,
- rocketModel[i].startingPortNumber,
- rocketModel[i].startingPortNumber + rocketModel[i].numPorts-1);
-
- if (num_aiops <= 0) {
- rcktpt_io_addr[i] = 0;
- return (0);
- }
- is_PCI[i] = 1;
-
- /* Reset the AIOPIC, init the serial ports */
- for (aiop = 0; aiop < num_aiops; aiop++) {
- sResetAiopByNum(ctlp, aiop);
- num_chan = ports_per_aiop;
- for (chan = 0; chan < num_chan; chan++)
- init_r_port(i, aiop, chan, dev);
- }
-
- /* Rocket modems must be reset */
- if ((rcktpt_type[i] == ROCKET_TYPE_MODEM) ||
- (rcktpt_type[i] == ROCKET_TYPE_MODEMII) ||
- (rcktpt_type[i] == ROCKET_TYPE_MODEMIII)) {
- num_chan = ports_per_aiop;
- for (chan = 0; chan < num_chan; chan++)
- sPCIModemReset(ctlp, chan, 1);
- msleep(500);
- for (chan = 0; chan < num_chan; chan++)
- sPCIModemReset(ctlp, chan, 0);
- msleep(500);
- rmSpeakerReset(ctlp, rocketModel[i].model);
- }
- return (1);
-}
-
-/*
- * Probes for PCI cards, inits them if found
- * Input: board_found = number of ISA boards already found, or the
- * starting board number
- * Returns: Number of PCI boards found
- */
-static int __init init_PCI(int boards_found)
-{
- struct pci_dev *dev = NULL;
- int count = 0;
-
- /* Work through the PCI device list, pulling out ours */
- while ((dev = pci_get_device(PCI_VENDOR_ID_RP, PCI_ANY_ID, dev))) {
- if (register_PCI(count + boards_found, dev))
- count++;
- }
- return (count);
-}
-
-#endif /* CONFIG_PCI */
-
-/*
- * Probes for ISA cards
- * Input: i = the board number to look for
- * Returns: 1 if board found, 0 else
- */
-static int __init init_ISA(int i)
-{
- int num_aiops, num_chan = 0, total_num_chan = 0;
- int aiop, chan;
- unsigned int aiopio[MAX_AIOPS_PER_BOARD];
- CONTROLLER_t *ctlp;
- char *type_string;
-
- /* If io_addr is zero, no board configured */
- if (rcktpt_io_addr[i] == 0)
- return (0);
-
- /* Reserve the IO region */
- if (!request_region(rcktpt_io_addr[i], 64, "Comtrol RocketPort")) {
- printk(KERN_ERR "Unable to reserve IO region for configured "
- "ISA RocketPort at address 0x%lx, board not "
- "installed...\n", rcktpt_io_addr[i]);
- rcktpt_io_addr[i] = 0;
- return (0);
- }
-
- ctlp = sCtlNumToCtlPtr(i);
-
- ctlp->boardType = rcktpt_type[i];
-
- switch (rcktpt_type[i]) {
- case ROCKET_TYPE_PC104:
- type_string = "(PC104)";
- break;
- case ROCKET_TYPE_MODEM:
- type_string = "(RocketModem)";
- break;
- case ROCKET_TYPE_MODEMII:
- type_string = "(RocketModem II)";
- break;
- default:
- type_string = "";
- break;
- }
-
- /*
- * If support_low_speed is set, use the slow clock prescale,
- * which supports 50 bps
- */
- if (support_low_speed) {
- sClockPrescale = 0x19; /* mod 9 (divide by 10) prescale */
- rp_baud_base[i] = 230400;
- } else {
- sClockPrescale = 0x14; /* mod 4 (devide by 5) prescale */
- rp_baud_base[i] = 460800;
- }
-
- for (aiop = 0; aiop < MAX_AIOPS_PER_BOARD; aiop++)
- aiopio[aiop] = rcktpt_io_addr[i] + (aiop * 0x400);
-
- num_aiops = sInitController(ctlp, i, controller + (i * 0x400), aiopio, MAX_AIOPS_PER_BOARD, 0, FREQ_DIS, 0);
-
- if (ctlp->boardType == ROCKET_TYPE_PC104) {
- sEnAiop(ctlp, 2); /* only one AIOPIC, but these */
- sEnAiop(ctlp, 3); /* CSels used for other stuff */
- }
-
- /* If something went wrong initing the AIOP's release the ISA IO memory */
- if (num_aiops <= 0) {
- release_region(rcktpt_io_addr[i], 64);
- rcktpt_io_addr[i] = 0;
- return (0);
- }
-
- rocketModel[i].startingPortNumber = nextLineNumber;
-
- for (aiop = 0; aiop < num_aiops; aiop++) {
- sResetAiopByNum(ctlp, aiop);
- sEnAiop(ctlp, aiop);
- num_chan = sGetAiopNumChan(ctlp, aiop);
- total_num_chan += num_chan;
- for (chan = 0; chan < num_chan; chan++)
- init_r_port(i, aiop, chan, NULL);
- }
- is_PCI[i] = 0;
- if ((rcktpt_type[i] == ROCKET_TYPE_MODEM) || (rcktpt_type[i] == ROCKET_TYPE_MODEMII)) {
- num_chan = sGetAiopNumChan(ctlp, 0);
- total_num_chan = num_chan;
- for (chan = 0; chan < num_chan; chan++)
- sModemReset(ctlp, chan, 1);
- msleep(500);
- for (chan = 0; chan < num_chan; chan++)
- sModemReset(ctlp, chan, 0);
- msleep(500);
- strcpy(rocketModel[i].modelString, "RocketModem ISA");
- } else {
- strcpy(rocketModel[i].modelString, "RocketPort ISA");
- }
- rocketModel[i].numPorts = total_num_chan;
- rocketModel[i].model = MODEL_ISA;
-
- printk(KERN_INFO "RocketPort ISA card #%d found at 0x%lx - %d AIOPs %s\n",
- i, rcktpt_io_addr[i], num_aiops, type_string);
-
- printk(KERN_INFO "Installing %s, creating /dev/ttyR%d - %ld\n",
- rocketModel[i].modelString,
- rocketModel[i].startingPortNumber,
- rocketModel[i].startingPortNumber +
- rocketModel[i].numPorts - 1);
-
- return (1);
-}
-
-static const struct tty_operations rocket_ops = {
- .open = rp_open,
- .close = rp_close,
- .write = rp_write,
- .put_char = rp_put_char,
- .write_room = rp_write_room,
- .chars_in_buffer = rp_chars_in_buffer,
- .flush_buffer = rp_flush_buffer,
- .ioctl = rp_ioctl,
- .throttle = rp_throttle,
- .unthrottle = rp_unthrottle,
- .set_termios = rp_set_termios,
- .stop = rp_stop,
- .start = rp_start,
- .hangup = rp_hangup,
- .break_ctl = rp_break,
- .send_xchar = rp_send_xchar,
- .wait_until_sent = rp_wait_until_sent,
- .tiocmget = rp_tiocmget,
- .tiocmset = rp_tiocmset,
-};
-
-static const struct tty_port_operations rocket_port_ops = {
- .carrier_raised = carrier_raised,
- .dtr_rts = dtr_rts,
-};
-
-/*
- * The module "startup" routine; it's run when the module is loaded.
- */
-static int __init rp_init(void)
-{
- int ret = -ENOMEM, pci_boards_found, isa_boards_found, i;
-
- printk(KERN_INFO "RocketPort device driver module, version %s, %s\n",
- ROCKET_VERSION, ROCKET_DATE);
-
- rocket_driver = alloc_tty_driver(MAX_RP_PORTS);
- if (!rocket_driver)
- goto err;
-
- /*
- * If board 1 is non-zero, there is at least one ISA configured. If controller is
- * zero, use the default controller IO address of board1 + 0x40.
- */
- if (board1) {
- if (controller == 0)
- controller = board1 + 0x40;
- } else {
- controller = 0; /* Used as a flag, meaning no ISA boards */
- }
-
- /* If an ISA card is configured, reserve the 4 byte IO space for the Mudbac controller */
- if (controller && (!request_region(controller, 4, "Comtrol RocketPort"))) {
- printk(KERN_ERR "Unable to reserve IO region for first "
- "configured ISA RocketPort controller 0x%lx. "
- "Driver exiting\n", controller);
- ret = -EBUSY;
- goto err_tty;
- }
-
- /* Store ISA variable retrieved from command line or .conf file. */
- rcktpt_io_addr[0] = board1;
- rcktpt_io_addr[1] = board2;
- rcktpt_io_addr[2] = board3;
- rcktpt_io_addr[3] = board4;
-
- rcktpt_type[0] = modem1 ? ROCKET_TYPE_MODEM : ROCKET_TYPE_NORMAL;
- rcktpt_type[0] = pc104_1[0] ? ROCKET_TYPE_PC104 : rcktpt_type[0];
- rcktpt_type[1] = modem2 ? ROCKET_TYPE_MODEM : ROCKET_TYPE_NORMAL;
- rcktpt_type[1] = pc104_2[0] ? ROCKET_TYPE_PC104 : rcktpt_type[1];
- rcktpt_type[2] = modem3 ? ROCKET_TYPE_MODEM : ROCKET_TYPE_NORMAL;
- rcktpt_type[2] = pc104_3[0] ? ROCKET_TYPE_PC104 : rcktpt_type[2];
- rcktpt_type[3] = modem4 ? ROCKET_TYPE_MODEM : ROCKET_TYPE_NORMAL;
- rcktpt_type[3] = pc104_4[0] ? ROCKET_TYPE_PC104 : rcktpt_type[3];
-
- /*
- * Set up the tty driver structure and then register this
- * driver with the tty layer.
- */
-
- rocket_driver->owner = THIS_MODULE;
- rocket_driver->flags = TTY_DRIVER_DYNAMIC_DEV;
- rocket_driver->name = "ttyR";
- rocket_driver->driver_name = "Comtrol RocketPort";
- rocket_driver->major = TTY_ROCKET_MAJOR;
- rocket_driver->minor_start = 0;
- rocket_driver->type = TTY_DRIVER_TYPE_SERIAL;
- rocket_driver->subtype = SERIAL_TYPE_NORMAL;
- rocket_driver->init_termios = tty_std_termios;
- rocket_driver->init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- rocket_driver->init_termios.c_ispeed = 9600;
- rocket_driver->init_termios.c_ospeed = 9600;
-#ifdef ROCKET_SOFT_FLOW
- rocket_driver->flags |= TTY_DRIVER_REAL_RAW;
-#endif
- tty_set_operations(rocket_driver, &rocket_ops);
-
- ret = tty_register_driver(rocket_driver);
- if (ret < 0) {
- printk(KERN_ERR "Couldn't install tty RocketPort driver\n");
- goto err_controller;
- }
-
-#ifdef ROCKET_DEBUG_OPEN
- printk(KERN_INFO "RocketPort driver is major %d\n", rocket_driver.major);
-#endif
-
- /*
- * OK, let's probe each of the controllers looking for boards. Any boards found
- * will be initialized here.
- */
- isa_boards_found = 0;
- pci_boards_found = 0;
-
- for (i = 0; i < NUM_BOARDS; i++) {
- if (init_ISA(i))
- isa_boards_found++;
- }
-
-#ifdef CONFIG_PCI
- if (isa_boards_found < NUM_BOARDS)
- pci_boards_found = init_PCI(isa_boards_found);
-#endif
-
- max_board = pci_boards_found + isa_boards_found;
-
- if (max_board == 0) {
- printk(KERN_ERR "No rocketport ports found; unloading driver\n");
- ret = -ENXIO;
- goto err_ttyu;
- }
-
- return 0;
-err_ttyu:
- tty_unregister_driver(rocket_driver);
-err_controller:
- if (controller)
- release_region(controller, 4);
-err_tty:
- put_tty_driver(rocket_driver);
-err:
- return ret;
-}
-
-
-static void rp_cleanup_module(void)
-{
- int retval;
- int i;
-
- del_timer_sync(&rocket_timer);
-
- retval = tty_unregister_driver(rocket_driver);
- if (retval)
- printk(KERN_ERR "Error %d while trying to unregister "
- "rocketport driver\n", -retval);
-
- for (i = 0; i < MAX_RP_PORTS; i++)
- if (rp_table[i]) {
- tty_unregister_device(rocket_driver, i);
- kfree(rp_table[i]);
- }
-
- put_tty_driver(rocket_driver);
-
- for (i = 0; i < NUM_BOARDS; i++) {
- if (rcktpt_io_addr[i] <= 0 || is_PCI[i])
- continue;
- release_region(rcktpt_io_addr[i], 64);
- }
- if (controller)
- release_region(controller, 4);
-}
-
-/***************************************************************************
-Function: sInitController
-Purpose: Initialization of controller global registers and controller
- structure.
-Call: sInitController(CtlP,CtlNum,MudbacIO,AiopIOList,AiopIOListSize,
- IRQNum,Frequency,PeriodicOnly)
- CONTROLLER_T *CtlP; Ptr to controller structure
- int CtlNum; Controller number
- ByteIO_t MudbacIO; Mudbac base I/O address.
- ByteIO_t *AiopIOList; List of I/O addresses for each AIOP.
- This list must be in the order the AIOPs will be found on the
- controller. Once an AIOP in the list is not found, it is
- assumed that there are no more AIOPs on the controller.
- int AiopIOListSize; Number of addresses in AiopIOList
- int IRQNum; Interrupt Request number. Can be any of the following:
- 0: Disable global interrupts
- 3: IRQ 3
- 4: IRQ 4
- 5: IRQ 5
- 9: IRQ 9
- 10: IRQ 10
- 11: IRQ 11
- 12: IRQ 12
- 15: IRQ 15
- Byte_t Frequency: A flag identifying the frequency
- of the periodic interrupt, can be any one of the following:
- FREQ_DIS - periodic interrupt disabled
- FREQ_137HZ - 137 Hertz
- FREQ_69HZ - 69 Hertz
- FREQ_34HZ - 34 Hertz
- FREQ_17HZ - 17 Hertz
- FREQ_9HZ - 9 Hertz
- FREQ_4HZ - 4 Hertz
- If IRQNum is set to 0 the Frequency parameter is
- overidden, it is forced to a value of FREQ_DIS.
- int PeriodicOnly: 1 if all interrupts except the periodic
- interrupt are to be blocked.
- 0 is both the periodic interrupt and
- other channel interrupts are allowed.
- If IRQNum is set to 0 the PeriodicOnly parameter is
- overidden, it is forced to a value of 0.
-Return: int: Number of AIOPs on the controller, or CTLID_NULL if controller
- initialization failed.
-
-Comments:
- If periodic interrupts are to be disabled but AIOP interrupts
- are allowed, set Frequency to FREQ_DIS and PeriodicOnly to 0.
-
- If interrupts are to be completely disabled set IRQNum to 0.
-
- Setting Frequency to FREQ_DIS and PeriodicOnly to 1 is an
- invalid combination.
-
- This function performs initialization of global interrupt modes,
- but it does not actually enable global interrupts. To enable
- and disable global interrupts use functions sEnGlobalInt() and
- sDisGlobalInt(). Enabling of global interrupts is normally not
- done until all other initializations are complete.
-
- Even if interrupts are globally enabled, they must also be
- individually enabled for each channel that is to generate
- interrupts.
-
-Warnings: No range checking on any of the parameters is done.
-
- No context switches are allowed while executing this function.
-
- After this function all AIOPs on the controller are disabled,
- they can be enabled with sEnAiop().
-*/
-static int sInitController(CONTROLLER_T * CtlP, int CtlNum, ByteIO_t MudbacIO,
- ByteIO_t * AiopIOList, int AiopIOListSize,
- int IRQNum, Byte_t Frequency, int PeriodicOnly)
-{
- int i;
- ByteIO_t io;
- int done;
-
- CtlP->AiopIntrBits = aiop_intr_bits;
- CtlP->AltChanRingIndicator = 0;
- CtlP->CtlNum = CtlNum;
- CtlP->CtlID = CTLID_0001; /* controller release 1 */
- CtlP->BusType = isISA;
- CtlP->MBaseIO = MudbacIO;
- CtlP->MReg1IO = MudbacIO + 1;
- CtlP->MReg2IO = MudbacIO + 2;
- CtlP->MReg3IO = MudbacIO + 3;
-#if 1
- CtlP->MReg2 = 0; /* interrupt disable */
- CtlP->MReg3 = 0; /* no periodic interrupts */
-#else
- if (sIRQMap[IRQNum] == 0) { /* interrupts globally disabled */
- CtlP->MReg2 = 0; /* interrupt disable */
- CtlP->MReg3 = 0; /* no periodic interrupts */
- } else {
- CtlP->MReg2 = sIRQMap[IRQNum]; /* set IRQ number */
- CtlP->MReg3 = Frequency; /* set frequency */
- if (PeriodicOnly) { /* periodic interrupt only */
- CtlP->MReg3 |= PERIODIC_ONLY;
- }
- }
-#endif
- sOutB(CtlP->MReg2IO, CtlP->MReg2);
- sOutB(CtlP->MReg3IO, CtlP->MReg3);
- sControllerEOI(CtlP); /* clear EOI if warm init */
- /* Init AIOPs */
- CtlP->NumAiop = 0;
- for (i = done = 0; i < AiopIOListSize; i++) {
- io = AiopIOList[i];
- CtlP->AiopIO[i] = (WordIO_t) io;
- CtlP->AiopIntChanIO[i] = io + _INT_CHAN;
- sOutB(CtlP->MReg2IO, CtlP->MReg2 | (i & 0x03)); /* AIOP index */
- sOutB(MudbacIO, (Byte_t) (io >> 6)); /* set up AIOP I/O in MUDBAC */
- if (done)
- continue;
- sEnAiop(CtlP, i); /* enable the AIOP */
- CtlP->AiopID[i] = sReadAiopID(io); /* read AIOP ID */
- if (CtlP->AiopID[i] == AIOPID_NULL) /* if AIOP does not exist */
- done = 1; /* done looking for AIOPs */
- else {
- CtlP->AiopNumChan[i] = sReadAiopNumChan((WordIO_t) io); /* num channels in AIOP */
- sOutW((WordIO_t) io + _INDX_ADDR, _CLK_PRE); /* clock prescaler */
- sOutB(io + _INDX_DATA, sClockPrescale);
- CtlP->NumAiop++; /* bump count of AIOPs */
- }
- sDisAiop(CtlP, i); /* disable AIOP */
- }
-
- if (CtlP->NumAiop == 0)
- return (-1);
- else
- return (CtlP->NumAiop);
-}
-
-/***************************************************************************
-Function: sPCIInitController
-Purpose: Initialization of controller global registers and controller
- structure.
-Call: sPCIInitController(CtlP,CtlNum,AiopIOList,AiopIOListSize,
- IRQNum,Frequency,PeriodicOnly)
- CONTROLLER_T *CtlP; Ptr to controller structure
- int CtlNum; Controller number
- ByteIO_t *AiopIOList; List of I/O addresses for each AIOP.
- This list must be in the order the AIOPs will be found on the
- controller. Once an AIOP in the list is not found, it is
- assumed that there are no more AIOPs on the controller.
- int AiopIOListSize; Number of addresses in AiopIOList
- int IRQNum; Interrupt Request number. Can be any of the following:
- 0: Disable global interrupts
- 3: IRQ 3
- 4: IRQ 4
- 5: IRQ 5
- 9: IRQ 9
- 10: IRQ 10
- 11: IRQ 11
- 12: IRQ 12
- 15: IRQ 15
- Byte_t Frequency: A flag identifying the frequency
- of the periodic interrupt, can be any one of the following:
- FREQ_DIS - periodic interrupt disabled
- FREQ_137HZ - 137 Hertz
- FREQ_69HZ - 69 Hertz
- FREQ_34HZ - 34 Hertz
- FREQ_17HZ - 17 Hertz
- FREQ_9HZ - 9 Hertz
- FREQ_4HZ - 4 Hertz
- If IRQNum is set to 0 the Frequency parameter is
- overidden, it is forced to a value of FREQ_DIS.
- int PeriodicOnly: 1 if all interrupts except the periodic
- interrupt are to be blocked.
- 0 is both the periodic interrupt and
- other channel interrupts are allowed.
- If IRQNum is set to 0 the PeriodicOnly parameter is
- overidden, it is forced to a value of 0.
-Return: int: Number of AIOPs on the controller, or CTLID_NULL if controller
- initialization failed.
-
-Comments:
- If periodic interrupts are to be disabled but AIOP interrupts
- are allowed, set Frequency to FREQ_DIS and PeriodicOnly to 0.
-
- If interrupts are to be completely disabled set IRQNum to 0.
-
- Setting Frequency to FREQ_DIS and PeriodicOnly to 1 is an
- invalid combination.
-
- This function performs initialization of global interrupt modes,
- but it does not actually enable global interrupts. To enable
- and disable global interrupts use functions sEnGlobalInt() and
- sDisGlobalInt(). Enabling of global interrupts is normally not
- done until all other initializations are complete.
-
- Even if interrupts are globally enabled, they must also be
- individually enabled for each channel that is to generate
- interrupts.
-
-Warnings: No range checking on any of the parameters is done.
-
- No context switches are allowed while executing this function.
-
- After this function all AIOPs on the controller are disabled,
- they can be enabled with sEnAiop().
-*/
-static int sPCIInitController(CONTROLLER_T * CtlP, int CtlNum,
- ByteIO_t * AiopIOList, int AiopIOListSize,
- WordIO_t ConfigIO, int IRQNum, Byte_t Frequency,
- int PeriodicOnly, int altChanRingIndicator,
- int UPCIRingInd)
-{
- int i;
- ByteIO_t io;
-
- CtlP->AltChanRingIndicator = altChanRingIndicator;
- CtlP->UPCIRingInd = UPCIRingInd;
- CtlP->CtlNum = CtlNum;
- CtlP->CtlID = CTLID_0001; /* controller release 1 */
- CtlP->BusType = isPCI; /* controller release 1 */
-
- if (ConfigIO) {
- CtlP->isUPCI = 1;
- CtlP->PCIIO = ConfigIO + _PCI_9030_INT_CTRL;
- CtlP->PCIIO2 = ConfigIO + _PCI_9030_GPIO_CTRL;
- CtlP->AiopIntrBits = upci_aiop_intr_bits;
- } else {
- CtlP->isUPCI = 0;
- CtlP->PCIIO =
- (WordIO_t) ((ByteIO_t) AiopIOList[0] + _PCI_INT_FUNC);
- CtlP->AiopIntrBits = aiop_intr_bits;
- }
-
- sPCIControllerEOI(CtlP); /* clear EOI if warm init */
- /* Init AIOPs */
- CtlP->NumAiop = 0;
- for (i = 0; i < AiopIOListSize; i++) {
- io = AiopIOList[i];
- CtlP->AiopIO[i] = (WordIO_t) io;
- CtlP->AiopIntChanIO[i] = io + _INT_CHAN;
-
- CtlP->AiopID[i] = sReadAiopID(io); /* read AIOP ID */
- if (CtlP->AiopID[i] == AIOPID_NULL) /* if AIOP does not exist */
- break; /* done looking for AIOPs */
-
- CtlP->AiopNumChan[i] = sReadAiopNumChan((WordIO_t) io); /* num channels in AIOP */
- sOutW((WordIO_t) io + _INDX_ADDR, _CLK_PRE); /* clock prescaler */
- sOutB(io + _INDX_DATA, sClockPrescale);
- CtlP->NumAiop++; /* bump count of AIOPs */
- }
-
- if (CtlP->NumAiop == 0)
- return (-1);
- else
- return (CtlP->NumAiop);
-}
-
-/***************************************************************************
-Function: sReadAiopID
-Purpose: Read the AIOP idenfication number directly from an AIOP.
-Call: sReadAiopID(io)
- ByteIO_t io: AIOP base I/O address
-Return: int: Flag AIOPID_XXXX if a valid AIOP is found, where X
- is replace by an identifying number.
- Flag AIOPID_NULL if no valid AIOP is found
-Warnings: No context switches are allowed while executing this function.
-
-*/
-static int sReadAiopID(ByteIO_t io)
-{
- Byte_t AiopID; /* ID byte from AIOP */
-
- sOutB(io + _CMD_REG, RESET_ALL); /* reset AIOP */
- sOutB(io + _CMD_REG, 0x0);
- AiopID = sInW(io + _CHN_STAT0) & 0x07;
- if (AiopID == 0x06)
- return (1);
- else /* AIOP does not exist */
- return (-1);
-}
-
-/***************************************************************************
-Function: sReadAiopNumChan
-Purpose: Read the number of channels available in an AIOP directly from
- an AIOP.
-Call: sReadAiopNumChan(io)
- WordIO_t io: AIOP base I/O address
-Return: int: The number of channels available
-Comments: The number of channels is determined by write/reads from identical
- offsets within the SRAM address spaces for channels 0 and 4.
- If the channel 4 space is mirrored to channel 0 it is a 4 channel
- AIOP, otherwise it is an 8 channel.
-Warnings: No context switches are allowed while executing this function.
-*/
-static int sReadAiopNumChan(WordIO_t io)
-{
- Word_t x;
- static Byte_t R[4] = { 0x00, 0x00, 0x34, 0x12 };
-
- /* write to chan 0 SRAM */
- out32((DWordIO_t) io + _INDX_ADDR, R);
- sOutW(io + _INDX_ADDR, 0); /* read from SRAM, chan 0 */
- x = sInW(io + _INDX_DATA);
- sOutW(io + _INDX_ADDR, 0x4000); /* read from SRAM, chan 4 */
- if (x != sInW(io + _INDX_DATA)) /* if different must be 8 chan */
- return (8);
- else
- return (4);
-}
-
-/***************************************************************************
-Function: sInitChan
-Purpose: Initialization of a channel and channel structure
-Call: sInitChan(CtlP,ChP,AiopNum,ChanNum)
- CONTROLLER_T *CtlP; Ptr to controller structure
- CHANNEL_T *ChP; Ptr to channel structure
- int AiopNum; AIOP number within controller
- int ChanNum; Channel number within AIOP
-Return: int: 1 if initialization succeeded, 0 if it fails because channel
- number exceeds number of channels available in AIOP.
-Comments: This function must be called before a channel can be used.
-Warnings: No range checking on any of the parameters is done.
-
- No context switches are allowed while executing this function.
-*/
-static int sInitChan(CONTROLLER_T * CtlP, CHANNEL_T * ChP, int AiopNum,
- int ChanNum)
-{
- int i;
- WordIO_t AiopIO;
- WordIO_t ChIOOff;
- Byte_t *ChR;
- Word_t ChOff;
- static Byte_t R[4];
- int brd9600;
-
- if (ChanNum >= CtlP->AiopNumChan[AiopNum])
- return 0; /* exceeds num chans in AIOP */
-
- /* Channel, AIOP, and controller identifiers */
- ChP->CtlP = CtlP;
- ChP->ChanID = CtlP->AiopID[AiopNum];
- ChP->AiopNum = AiopNum;
- ChP->ChanNum = ChanNum;
-
- /* Global direct addresses */
- AiopIO = CtlP->AiopIO[AiopNum];
- ChP->Cmd = (ByteIO_t) AiopIO + _CMD_REG;
- ChP->IntChan = (ByteIO_t) AiopIO + _INT_CHAN;
- ChP->IntMask = (ByteIO_t) AiopIO + _INT_MASK;
- ChP->IndexAddr = (DWordIO_t) AiopIO + _INDX_ADDR;
- ChP->IndexData = AiopIO + _INDX_DATA;
-
- /* Channel direct addresses */
- ChIOOff = AiopIO + ChP->ChanNum * 2;
- ChP->TxRxData = ChIOOff + _TD0;
- ChP->ChanStat = ChIOOff + _CHN_STAT0;
- ChP->TxRxCount = ChIOOff + _FIFO_CNT0;
- ChP->IntID = (ByteIO_t) AiopIO + ChP->ChanNum + _INT_ID0;
-
- /* Initialize the channel from the RData array */
- for (i = 0; i < RDATASIZE; i += 4) {
- R[0] = RData[i];
- R[1] = RData[i + 1] + 0x10 * ChanNum;
- R[2] = RData[i + 2];
- R[3] = RData[i + 3];
- out32(ChP->IndexAddr, R);
- }
-
- ChR = ChP->R;
- for (i = 0; i < RREGDATASIZE; i += 4) {
- ChR[i] = RRegData[i];
- ChR[i + 1] = RRegData[i + 1] + 0x10 * ChanNum;
- ChR[i + 2] = RRegData[i + 2];
- ChR[i + 3] = RRegData[i + 3];
- }
-
- /* Indexed registers */
- ChOff = (Word_t) ChanNum *0x1000;
-
- if (sClockPrescale == 0x14)
- brd9600 = 47;
- else
- brd9600 = 23;
-
- ChP->BaudDiv[0] = (Byte_t) (ChOff + _BAUD);
- ChP->BaudDiv[1] = (Byte_t) ((ChOff + _BAUD) >> 8);
- ChP->BaudDiv[2] = (Byte_t) brd9600;
- ChP->BaudDiv[3] = (Byte_t) (brd9600 >> 8);
- out32(ChP->IndexAddr, ChP->BaudDiv);
-
- ChP->TxControl[0] = (Byte_t) (ChOff + _TX_CTRL);
- ChP->TxControl[1] = (Byte_t) ((ChOff + _TX_CTRL) >> 8);
- ChP->TxControl[2] = 0;
- ChP->TxControl[3] = 0;
- out32(ChP->IndexAddr, ChP->TxControl);
-
- ChP->RxControl[0] = (Byte_t) (ChOff + _RX_CTRL);
- ChP->RxControl[1] = (Byte_t) ((ChOff + _RX_CTRL) >> 8);
- ChP->RxControl[2] = 0;
- ChP->RxControl[3] = 0;
- out32(ChP->IndexAddr, ChP->RxControl);
-
- ChP->TxEnables[0] = (Byte_t) (ChOff + _TX_ENBLS);
- ChP->TxEnables[1] = (Byte_t) ((ChOff + _TX_ENBLS) >> 8);
- ChP->TxEnables[2] = 0;
- ChP->TxEnables[3] = 0;
- out32(ChP->IndexAddr, ChP->TxEnables);
-
- ChP->TxCompare[0] = (Byte_t) (ChOff + _TXCMP1);
- ChP->TxCompare[1] = (Byte_t) ((ChOff + _TXCMP1) >> 8);
- ChP->TxCompare[2] = 0;
- ChP->TxCompare[3] = 0;
- out32(ChP->IndexAddr, ChP->TxCompare);
-
- ChP->TxReplace1[0] = (Byte_t) (ChOff + _TXREP1B1);
- ChP->TxReplace1[1] = (Byte_t) ((ChOff + _TXREP1B1) >> 8);
- ChP->TxReplace1[2] = 0;
- ChP->TxReplace1[3] = 0;
- out32(ChP->IndexAddr, ChP->TxReplace1);
-
- ChP->TxReplace2[0] = (Byte_t) (ChOff + _TXREP2);
- ChP->TxReplace2[1] = (Byte_t) ((ChOff + _TXREP2) >> 8);
- ChP->TxReplace2[2] = 0;
- ChP->TxReplace2[3] = 0;
- out32(ChP->IndexAddr, ChP->TxReplace2);
-
- ChP->TxFIFOPtrs = ChOff + _TXF_OUTP;
- ChP->TxFIFO = ChOff + _TX_FIFO;
-
- sOutB(ChP->Cmd, (Byte_t) ChanNum | RESTXFCNT); /* apply reset Tx FIFO count */
- sOutB(ChP->Cmd, (Byte_t) ChanNum); /* remove reset Tx FIFO count */
- sOutW((WordIO_t) ChP->IndexAddr, ChP->TxFIFOPtrs); /* clear Tx in/out ptrs */
- sOutW(ChP->IndexData, 0);
- ChP->RxFIFOPtrs = ChOff + _RXF_OUTP;
- ChP->RxFIFO = ChOff + _RX_FIFO;
-
- sOutB(ChP->Cmd, (Byte_t) ChanNum | RESRXFCNT); /* apply reset Rx FIFO count */
- sOutB(ChP->Cmd, (Byte_t) ChanNum); /* remove reset Rx FIFO count */
- sOutW((WordIO_t) ChP->IndexAddr, ChP->RxFIFOPtrs); /* clear Rx out ptr */
- sOutW(ChP->IndexData, 0);
- sOutW((WordIO_t) ChP->IndexAddr, ChP->RxFIFOPtrs + 2); /* clear Rx in ptr */
- sOutW(ChP->IndexData, 0);
- ChP->TxPrioCnt = ChOff + _TXP_CNT;
- sOutW((WordIO_t) ChP->IndexAddr, ChP->TxPrioCnt);
- sOutB(ChP->IndexData, 0);
- ChP->TxPrioPtr = ChOff + _TXP_PNTR;
- sOutW((WordIO_t) ChP->IndexAddr, ChP->TxPrioPtr);
- sOutB(ChP->IndexData, 0);
- ChP->TxPrioBuf = ChOff + _TXP_BUF;
- sEnRxProcessor(ChP); /* start the Rx processor */
-
- return 1;
-}
-
-/***************************************************************************
-Function: sStopRxProcessor
-Purpose: Stop the receive processor from processing a channel.
-Call: sStopRxProcessor(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-
-Comments: The receive processor can be started again with sStartRxProcessor().
- This function causes the receive processor to skip over the
- stopped channel. It does not stop it from processing other channels.
-
-Warnings: No context switches are allowed while executing this function.
-
- Do not leave the receive processor stopped for more than one
- character time.
-
- After calling this function a delay of 4 uS is required to ensure
- that the receive processor is no longer processing this channel.
-*/
-static void sStopRxProcessor(CHANNEL_T * ChP)
-{
- Byte_t R[4];
-
- R[0] = ChP->R[0];
- R[1] = ChP->R[1];
- R[2] = 0x0a;
- R[3] = ChP->R[3];
- out32(ChP->IndexAddr, R);
-}
-
-/***************************************************************************
-Function: sFlushRxFIFO
-Purpose: Flush the Rx FIFO
-Call: sFlushRxFIFO(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Return: void
-Comments: To prevent data from being enqueued or dequeued in the Tx FIFO
- while it is being flushed the receive processor is stopped
- and the transmitter is disabled. After these operations a
- 4 uS delay is done before clearing the pointers to allow
- the receive processor to stop. These items are handled inside
- this function.
-Warnings: No context switches are allowed while executing this function.
-*/
-static void sFlushRxFIFO(CHANNEL_T * ChP)
-{
- int i;
- Byte_t Ch; /* channel number within AIOP */
- int RxFIFOEnabled; /* 1 if Rx FIFO enabled */
-
- if (sGetRxCnt(ChP) == 0) /* Rx FIFO empty */
- return; /* don't need to flush */
-
- RxFIFOEnabled = 0;
- if (ChP->R[0x32] == 0x08) { /* Rx FIFO is enabled */
- RxFIFOEnabled = 1;
- sDisRxFIFO(ChP); /* disable it */
- for (i = 0; i < 2000 / 200; i++) /* delay 2 uS to allow proc to disable FIFO */
- sInB(ChP->IntChan); /* depends on bus i/o timing */
- }
- sGetChanStatus(ChP); /* clear any pending Rx errors in chan stat */
- Ch = (Byte_t) sGetChanNum(ChP);
- sOutB(ChP->Cmd, Ch | RESRXFCNT); /* apply reset Rx FIFO count */
- sOutB(ChP->Cmd, Ch); /* remove reset Rx FIFO count */
- sOutW((WordIO_t) ChP->IndexAddr, ChP->RxFIFOPtrs); /* clear Rx out ptr */
- sOutW(ChP->IndexData, 0);
- sOutW((WordIO_t) ChP->IndexAddr, ChP->RxFIFOPtrs + 2); /* clear Rx in ptr */
- sOutW(ChP->IndexData, 0);
- if (RxFIFOEnabled)
- sEnRxFIFO(ChP); /* enable Rx FIFO */
-}
-
-/***************************************************************************
-Function: sFlushTxFIFO
-Purpose: Flush the Tx FIFO
-Call: sFlushTxFIFO(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Return: void
-Comments: To prevent data from being enqueued or dequeued in the Tx FIFO
- while it is being flushed the receive processor is stopped
- and the transmitter is disabled. After these operations a
- 4 uS delay is done before clearing the pointers to allow
- the receive processor to stop. These items are handled inside
- this function.
-Warnings: No context switches are allowed while executing this function.
-*/
-static void sFlushTxFIFO(CHANNEL_T * ChP)
-{
- int i;
- Byte_t Ch; /* channel number within AIOP */
- int TxEnabled; /* 1 if transmitter enabled */
-
- if (sGetTxCnt(ChP) == 0) /* Tx FIFO empty */
- return; /* don't need to flush */
-
- TxEnabled = 0;
- if (ChP->TxControl[3] & TX_ENABLE) {
- TxEnabled = 1;
- sDisTransmit(ChP); /* disable transmitter */
- }
- sStopRxProcessor(ChP); /* stop Rx processor */
- for (i = 0; i < 4000 / 200; i++) /* delay 4 uS to allow proc to stop */
- sInB(ChP->IntChan); /* depends on bus i/o timing */
- Ch = (Byte_t) sGetChanNum(ChP);
- sOutB(ChP->Cmd, Ch | RESTXFCNT); /* apply reset Tx FIFO count */
- sOutB(ChP->Cmd, Ch); /* remove reset Tx FIFO count */
- sOutW((WordIO_t) ChP->IndexAddr, ChP->TxFIFOPtrs); /* clear Tx in/out ptrs */
- sOutW(ChP->IndexData, 0);
- if (TxEnabled)
- sEnTransmit(ChP); /* enable transmitter */
- sStartRxProcessor(ChP); /* restart Rx processor */
-}
-
-/***************************************************************************
-Function: sWriteTxPrioByte
-Purpose: Write a byte of priority transmit data to a channel
-Call: sWriteTxPrioByte(ChP,Data)
- CHANNEL_T *ChP; Ptr to channel structure
- Byte_t Data; The transmit data byte
-
-Return: int: 1 if the bytes is successfully written, otherwise 0.
-
-Comments: The priority byte is transmitted before any data in the Tx FIFO.
-
-Warnings: No context switches are allowed while executing this function.
-*/
-static int sWriteTxPrioByte(CHANNEL_T * ChP, Byte_t Data)
-{
- Byte_t DWBuf[4]; /* buffer for double word writes */
- Word_t *WordPtr; /* must be far because Win SS != DS */
- register DWordIO_t IndexAddr;
-
- if (sGetTxCnt(ChP) > 1) { /* write it to Tx priority buffer */
- IndexAddr = ChP->IndexAddr;
- sOutW((WordIO_t) IndexAddr, ChP->TxPrioCnt); /* get priority buffer status */
- if (sInB((ByteIO_t) ChP->IndexData) & PRI_PEND) /* priority buffer busy */
- return (0); /* nothing sent */
-
- WordPtr = (Word_t *) (&DWBuf[0]);
- *WordPtr = ChP->TxPrioBuf; /* data byte address */
-
- DWBuf[2] = Data; /* data byte value */
- out32(IndexAddr, DWBuf); /* write it out */
-
- *WordPtr = ChP->TxPrioCnt; /* Tx priority count address */
-
- DWBuf[2] = PRI_PEND + 1; /* indicate 1 byte pending */
- DWBuf[3] = 0; /* priority buffer pointer */
- out32(IndexAddr, DWBuf); /* write it out */
- } else { /* write it to Tx FIFO */
-
- sWriteTxByte(sGetTxRxDataIO(ChP), Data);
- }
- return (1); /* 1 byte sent */
-}
-
-/***************************************************************************
-Function: sEnInterrupts
-Purpose: Enable one or more interrupts for a channel
-Call: sEnInterrupts(ChP,Flags)
- CHANNEL_T *ChP; Ptr to channel structure
- Word_t Flags: Interrupt enable flags, can be any combination
- of the following flags:
- TXINT_EN: Interrupt on Tx FIFO empty
- RXINT_EN: Interrupt on Rx FIFO at trigger level (see
- sSetRxTrigger())
- SRCINT_EN: Interrupt on SRC (Special Rx Condition)
- MCINT_EN: Interrupt on modem input change
- CHANINT_EN: Allow channel interrupt signal to the AIOP's
- Interrupt Channel Register.
-Return: void
-Comments: If an interrupt enable flag is set in Flags, that interrupt will be
- enabled. If an interrupt enable flag is not set in Flags, that
- interrupt will not be changed. Interrupts can be disabled with
- function sDisInterrupts().
-
- This function sets the appropriate bit for the channel in the AIOP's
- Interrupt Mask Register if the CHANINT_EN flag is set. This allows
- this channel's bit to be set in the AIOP's Interrupt Channel Register.
-
- Interrupts must also be globally enabled before channel interrupts
- will be passed on to the host. This is done with function
- sEnGlobalInt().
-
- In some cases it may be desirable to disable interrupts globally but
- enable channel interrupts. This would allow the global interrupt
- status register to be used to determine which AIOPs need service.
-*/
-static void sEnInterrupts(CHANNEL_T * ChP, Word_t Flags)
-{
- Byte_t Mask; /* Interrupt Mask Register */
-
- ChP->RxControl[2] |=
- ((Byte_t) Flags & (RXINT_EN | SRCINT_EN | MCINT_EN));
-
- out32(ChP->IndexAddr, ChP->RxControl);
-
- ChP->TxControl[2] |= ((Byte_t) Flags & TXINT_EN);
-
- out32(ChP->IndexAddr, ChP->TxControl);
-
- if (Flags & CHANINT_EN) {
- Mask = sInB(ChP->IntMask) | sBitMapSetTbl[ChP->ChanNum];
- sOutB(ChP->IntMask, Mask);
- }
-}
-
-/***************************************************************************
-Function: sDisInterrupts
-Purpose: Disable one or more interrupts for a channel
-Call: sDisInterrupts(ChP,Flags)
- CHANNEL_T *ChP; Ptr to channel structure
- Word_t Flags: Interrupt flags, can be any combination
- of the following flags:
- TXINT_EN: Interrupt on Tx FIFO empty
- RXINT_EN: Interrupt on Rx FIFO at trigger level (see
- sSetRxTrigger())
- SRCINT_EN: Interrupt on SRC (Special Rx Condition)
- MCINT_EN: Interrupt on modem input change
- CHANINT_EN: Disable channel interrupt signal to the
- AIOP's Interrupt Channel Register.
-Return: void
-Comments: If an interrupt flag is set in Flags, that interrupt will be
- disabled. If an interrupt flag is not set in Flags, that
- interrupt will not be changed. Interrupts can be enabled with
- function sEnInterrupts().
-
- This function clears the appropriate bit for the channel in the AIOP's
- Interrupt Mask Register if the CHANINT_EN flag is set. This blocks
- this channel's bit from being set in the AIOP's Interrupt Channel
- Register.
-*/
-static void sDisInterrupts(CHANNEL_T * ChP, Word_t Flags)
-{
- Byte_t Mask; /* Interrupt Mask Register */
-
- ChP->RxControl[2] &=
- ~((Byte_t) Flags & (RXINT_EN | SRCINT_EN | MCINT_EN));
- out32(ChP->IndexAddr, ChP->RxControl);
- ChP->TxControl[2] &= ~((Byte_t) Flags & TXINT_EN);
- out32(ChP->IndexAddr, ChP->TxControl);
-
- if (Flags & CHANINT_EN) {
- Mask = sInB(ChP->IntMask) & sBitMapClrTbl[ChP->ChanNum];
- sOutB(ChP->IntMask, Mask);
- }
-}
-
-static void sSetInterfaceMode(CHANNEL_T * ChP, Byte_t mode)
-{
- sOutB(ChP->CtlP->AiopIO[2], (mode & 0x18) | ChP->ChanNum);
-}
-
-/*
- * Not an official SSCI function, but how to reset RocketModems.
- * ISA bus version
- */
-static void sModemReset(CONTROLLER_T * CtlP, int chan, int on)
-{
- ByteIO_t addr;
- Byte_t val;
-
- addr = CtlP->AiopIO[0] + 0x400;
- val = sInB(CtlP->MReg3IO);
- /* if AIOP[1] is not enabled, enable it */
- if ((val & 2) == 0) {
- val = sInB(CtlP->MReg2IO);
- sOutB(CtlP->MReg2IO, (val & 0xfc) | (1 & 0x03));
- sOutB(CtlP->MBaseIO, (unsigned char) (addr >> 6));
- }
-
- sEnAiop(CtlP, 1);
- if (!on)
- addr += 8;
- sOutB(addr + chan, 0); /* apply or remove reset */
- sDisAiop(CtlP, 1);
-}
-
-/*
- * Not an official SSCI function, but how to reset RocketModems.
- * PCI bus version
- */
-static void sPCIModemReset(CONTROLLER_T * CtlP, int chan, int on)
-{
- ByteIO_t addr;
-
- addr = CtlP->AiopIO[0] + 0x40; /* 2nd AIOP */
- if (!on)
- addr += 8;
- sOutB(addr + chan, 0); /* apply or remove reset */
-}
-
-/* Resets the speaker controller on RocketModem II and III devices */
-static void rmSpeakerReset(CONTROLLER_T * CtlP, unsigned long model)
-{
- ByteIO_t addr;
-
- /* RocketModem II speaker control is at the 8th port location of offset 0x40 */
- if ((model == MODEL_RP4M) || (model == MODEL_RP6M)) {
- addr = CtlP->AiopIO[0] + 0x4F;
- sOutB(addr, 0);
- }
-
- /* RocketModem III speaker control is at the 1st port location of offset 0x80 */
- if ((model == MODEL_UPCI_RM3_8PORT)
- || (model == MODEL_UPCI_RM3_4PORT)) {
- addr = CtlP->AiopIO[0] + 0x88;
- sOutB(addr, 0);
- }
-}
-
-/* Returns the line number given the controller (board), aiop and channel number */
-static unsigned char GetLineNumber(int ctrl, int aiop, int ch)
-{
- return lineNumbers[(ctrl << 5) | (aiop << 3) | ch];
-}
-
-/*
- * Stores the line number associated with a given controller (board), aiop
- * and channel number.
- * Returns: The line number assigned
- */
-static unsigned char SetLineNumber(int ctrl, int aiop, int ch)
-{
- lineNumbers[(ctrl << 5) | (aiop << 3) | ch] = nextLineNumber++;
- return (nextLineNumber - 1);
-}
+++ /dev/null
-/*
- * rocket.h --- the exported interface of the rocket driver to its configuration program.
- *
- * Written by Theodore Ts'o, Copyright 1997.
- * Copyright 1997 Comtrol Corporation.
- *
- */
-
-/* Model Information Struct */
-typedef struct {
- unsigned long model;
- char modelString[80];
- unsigned long numPorts;
- int loadrm2;
- int startingPortNumber;
-} rocketModel_t;
-
-struct rocket_config {
- int line;
- int flags;
- int closing_wait;
- int close_delay;
- int port;
- int reserved[32];
-};
-
-struct rocket_ports {
- int tty_major;
- int callout_major;
- rocketModel_t rocketModel[8];
-};
-
-struct rocket_version {
- char rocket_version[32];
- char rocket_date[32];
- char reserved[64];
-};
-
-/*
- * Rocketport flags
- */
-/*#define ROCKET_CALLOUT_NOHUP 0x00000001 */
-#define ROCKET_FORCE_CD 0x00000002
-#define ROCKET_HUP_NOTIFY 0x00000004
-#define ROCKET_SPLIT_TERMIOS 0x00000008
-#define ROCKET_SPD_MASK 0x00000070
-#define ROCKET_SPD_HI 0x00000010 /* Use 56000 instead of 38400 bps */
-#define ROCKET_SPD_VHI 0x00000020 /* Use 115200 instead of 38400 bps */
-#define ROCKET_SPD_SHI 0x00000030 /* Use 230400 instead of 38400 bps */
-#define ROCKET_SPD_WARP 0x00000040 /* Use 460800 instead of 38400 bps */
-#define ROCKET_SAK 0x00000080
-#define ROCKET_SESSION_LOCKOUT 0x00000100
-#define ROCKET_PGRP_LOCKOUT 0x00000200
-#define ROCKET_RTS_TOGGLE 0x00000400
-#define ROCKET_MODE_MASK 0x00003000
-#define ROCKET_MODE_RS232 0x00000000
-#define ROCKET_MODE_RS485 0x00001000
-#define ROCKET_MODE_RS422 0x00002000
-#define ROCKET_FLAGS 0x00003FFF
-
-#define ROCKET_USR_MASK 0x0071 /* Legal flags that non-privileged
- * users can set or reset */
-
-/*
- * For closing_wait and closing_wait2
- */
-#define ROCKET_CLOSING_WAIT_NONE ASYNC_CLOSING_WAIT_NONE
-#define ROCKET_CLOSING_WAIT_INF ASYNC_CLOSING_WAIT_INF
-
-/*
- * Rocketport ioctls -- "RP"
- */
-#define RCKP_GET_STRUCT 0x00525001
-#define RCKP_GET_CONFIG 0x00525002
-#define RCKP_SET_CONFIG 0x00525003
-#define RCKP_GET_PORTS 0x00525004
-#define RCKP_RESET_RM2 0x00525005
-#define RCKP_GET_VERSION 0x00525006
-
-/* Rocketport Models */
-#define MODEL_RP32INTF 0x0001 /* RP 32 port w/external I/F */
-#define MODEL_RP8INTF 0x0002 /* RP 8 port w/external I/F */
-#define MODEL_RP16INTF 0x0003 /* RP 16 port w/external I/F */
-#define MODEL_RP8OCTA 0x0005 /* RP 8 port w/octa cable */
-#define MODEL_RP4QUAD 0x0004 /* RP 4 port w/quad cable */
-#define MODEL_RP8J 0x0006 /* RP 8 port w/RJ11 connectors */
-#define MODEL_RP4J 0x0007 /* RP 4 port w/RJ45 connectors */
-#define MODEL_RP8SNI 0x0008 /* RP 8 port w/ DB78 SNI connector */
-#define MODEL_RP16SNI 0x0009 /* RP 16 port w/ DB78 SNI connector */
-#define MODEL_RPP4 0x000A /* RP Plus 4 port */
-#define MODEL_RPP8 0x000B /* RP Plus 8 port */
-#define MODEL_RP2_232 0x000E /* RP Plus 2 port RS232 */
-#define MODEL_RP2_422 0x000F /* RP Plus 2 port RS232 */
-
-/* Rocketmodem II Models */
-#define MODEL_RP6M 0x000C /* RM 6 port */
-#define MODEL_RP4M 0x000D /* RM 4 port */
-
-/* Universal PCI boards */
-#define MODEL_UPCI_RP32INTF 0x0801 /* RP UPCI 32 port w/external I/F */
-#define MODEL_UPCI_RP8INTF 0x0802 /* RP UPCI 8 port w/external I/F */
-#define MODEL_UPCI_RP16INTF 0x0803 /* RP UPCI 16 port w/external I/F */
-#define MODEL_UPCI_RP8OCTA 0x0805 /* RP UPCI 8 port w/octa cable */
-#define MODEL_UPCI_RM3_8PORT 0x080C /* RP UPCI Rocketmodem III 8 port */
-#define MODEL_UPCI_RM3_4PORT 0x080C /* RP UPCI Rocketmodem III 4 port */
-
-/* Compact PCI 16 port */
-#define MODEL_CPCI_RP16INTF 0x0903 /* RP Compact PCI 16 port w/external I/F */
-
-/* All ISA boards */
-#define MODEL_ISA 0x1000
+++ /dev/null
-/*
- * rocket_int.h --- internal header file for rocket.c
- *
- * Written by Theodore Ts'o, Copyright 1997.
- * Copyright 1997 Comtrol Corporation.
- *
- */
-
-/*
- * Definition of the types in rcktpt_type
- */
-#define ROCKET_TYPE_NORMAL 0
-#define ROCKET_TYPE_MODEM 1
-#define ROCKET_TYPE_MODEMII 2
-#define ROCKET_TYPE_MODEMIII 3
-#define ROCKET_TYPE_PC104 4
-
-#include <linux/mutex.h>
-
-#include <asm/io.h>
-#include <asm/byteorder.h>
-
-typedef unsigned char Byte_t;
-typedef unsigned int ByteIO_t;
-
-typedef unsigned int Word_t;
-typedef unsigned int WordIO_t;
-
-typedef unsigned int DWordIO_t;
-
-/*
- * Note! Normally the Linux I/O macros already take care of
- * byte-swapping the I/O instructions. However, all accesses using
- * sOutDW aren't really 32-bit accesses, but should be handled in byte
- * order. Hence the use of the cpu_to_le32() macro to byte-swap
- * things to no-op the byte swapping done by the big-endian outl()
- * instruction.
- */
-
-static inline void sOutB(unsigned short port, unsigned char value)
-{
-#ifdef ROCKET_DEBUG_IO
- printk(KERN_DEBUG "sOutB(%x, %x)...\n", port, value);
-#endif
- outb_p(value, port);
-}
-
-static inline void sOutW(unsigned short port, unsigned short value)
-{
-#ifdef ROCKET_DEBUG_IO
- printk(KERN_DEBUG "sOutW(%x, %x)...\n", port, value);
-#endif
- outw_p(value, port);
-}
-
-static inline void out32(unsigned short port, Byte_t *p)
-{
- u32 value = get_unaligned_le32(p);
-#ifdef ROCKET_DEBUG_IO
- printk(KERN_DEBUG "out32(%x, %lx)...\n", port, value);
-#endif
- outl_p(value, port);
-}
-
-static inline unsigned char sInB(unsigned short port)
-{
- return inb_p(port);
-}
-
-static inline unsigned short sInW(unsigned short port)
-{
- return inw_p(port);
-}
-
-/* This is used to move arrays of bytes so byte swapping isn't appropriate. */
-#define sOutStrW(port, addr, count) if (count) outsw(port, addr, count)
-#define sInStrW(port, addr, count) if (count) insw(port, addr, count)
-
-#define CTL_SIZE 8
-#define AIOP_CTL_SIZE 4
-#define CHAN_AIOP_SIZE 8
-#define MAX_PORTS_PER_AIOP 8
-#define MAX_AIOPS_PER_BOARD 4
-#define MAX_PORTS_PER_BOARD 32
-
-/* Bus type ID */
-#define isISA 0
-#define isPCI 1
-#define isMC 2
-
-/* Controller ID numbers */
-#define CTLID_NULL -1 /* no controller exists */
-#define CTLID_0001 0x0001 /* controller release 1 */
-
-/* AIOP ID numbers, identifies AIOP type implementing channel */
-#define AIOPID_NULL -1 /* no AIOP or channel exists */
-#define AIOPID_0001 0x0001 /* AIOP release 1 */
-
-/************************************************************************
- Global Register Offsets - Direct Access - Fixed values
-************************************************************************/
-
-#define _CMD_REG 0x38 /* Command Register 8 Write */
-#define _INT_CHAN 0x39 /* Interrupt Channel Register 8 Read */
-#define _INT_MASK 0x3A /* Interrupt Mask Register 8 Read / Write */
-#define _UNUSED 0x3B /* Unused 8 */
-#define _INDX_ADDR 0x3C /* Index Register Address 16 Write */
-#define _INDX_DATA 0x3E /* Index Register Data 8/16 Read / Write */
-
-/************************************************************************
- Channel Register Offsets for 1st channel in AIOP - Direct Access
-************************************************************************/
-#define _TD0 0x00 /* Transmit Data 16 Write */
-#define _RD0 0x00 /* Receive Data 16 Read */
-#define _CHN_STAT0 0x20 /* Channel Status 8/16 Read / Write */
-#define _FIFO_CNT0 0x10 /* Transmit/Receive FIFO Count 16 Read */
-#define _INT_ID0 0x30 /* Interrupt Identification 8 Read */
-
-/************************************************************************
- Tx Control Register Offsets - Indexed - External - Fixed
-************************************************************************/
-#define _TX_ENBLS 0x980 /* Tx Processor Enables Register 8 Read / Write */
-#define _TXCMP1 0x988 /* Transmit Compare Value #1 8 Read / Write */
-#define _TXCMP2 0x989 /* Transmit Compare Value #2 8 Read / Write */
-#define _TXREP1B1 0x98A /* Tx Replace Value #1 - Byte 1 8 Read / Write */
-#define _TXREP1B2 0x98B /* Tx Replace Value #1 - Byte 2 8 Read / Write */
-#define _TXREP2 0x98C /* Transmit Replace Value #2 8 Read / Write */
-
-/************************************************************************
-Memory Controller Register Offsets - Indexed - External - Fixed
-************************************************************************/
-#define _RX_FIFO 0x000 /* Rx FIFO */
-#define _TX_FIFO 0x800 /* Tx FIFO */
-#define _RXF_OUTP 0x990 /* Rx FIFO OUT pointer 16 Read / Write */
-#define _RXF_INP 0x992 /* Rx FIFO IN pointer 16 Read / Write */
-#define _TXF_OUTP 0x994 /* Tx FIFO OUT pointer 8 Read / Write */
-#define _TXF_INP 0x995 /* Tx FIFO IN pointer 8 Read / Write */
-#define _TXP_CNT 0x996 /* Tx Priority Count 8 Read / Write */
-#define _TXP_PNTR 0x997 /* Tx Priority Pointer 8 Read / Write */
-
-#define PRI_PEND 0x80 /* Priority data pending (bit7, Tx pri cnt) */
-#define TXFIFO_SIZE 255 /* size of Tx FIFO */
-#define RXFIFO_SIZE 1023 /* size of Rx FIFO */
-
-/************************************************************************
-Tx Priority Buffer - Indexed - External - Fixed
-************************************************************************/
-#define _TXP_BUF 0x9C0 /* Tx Priority Buffer 32 Bytes Read / Write */
-#define TXP_SIZE 0x20 /* 32 bytes */
-
-/************************************************************************
-Channel Register Offsets - Indexed - Internal - Fixed
-************************************************************************/
-
-#define _TX_CTRL 0xFF0 /* Transmit Control 16 Write */
-#define _RX_CTRL 0xFF2 /* Receive Control 8 Write */
-#define _BAUD 0xFF4 /* Baud Rate 16 Write */
-#define _CLK_PRE 0xFF6 /* Clock Prescaler 8 Write */
-
-#define STMBREAK 0x08 /* BREAK */
-#define STMFRAME 0x04 /* framing error */
-#define STMRCVROVR 0x02 /* receiver over run error */
-#define STMPARITY 0x01 /* parity error */
-#define STMERROR (STMBREAK | STMFRAME | STMPARITY)
-#define STMBREAKH 0x800 /* BREAK */
-#define STMFRAMEH 0x400 /* framing error */
-#define STMRCVROVRH 0x200 /* receiver over run error */
-#define STMPARITYH 0x100 /* parity error */
-#define STMERRORH (STMBREAKH | STMFRAMEH | STMPARITYH)
-
-#define CTS_ACT 0x20 /* CTS input asserted */
-#define DSR_ACT 0x10 /* DSR input asserted */
-#define CD_ACT 0x08 /* CD input asserted */
-#define TXFIFOMT 0x04 /* Tx FIFO is empty */
-#define TXSHRMT 0x02 /* Tx shift register is empty */
-#define RDA 0x01 /* Rx data available */
-#define DRAINED (TXFIFOMT | TXSHRMT) /* indicates Tx is drained */
-
-#define STATMODE 0x8000 /* status mode enable bit */
-#define RXFOVERFL 0x2000 /* receive FIFO overflow */
-#define RX2MATCH 0x1000 /* receive compare byte 2 match */
-#define RX1MATCH 0x0800 /* receive compare byte 1 match */
-#define RXBREAK 0x0400 /* received BREAK */
-#define RXFRAME 0x0200 /* received framing error */
-#define RXPARITY 0x0100 /* received parity error */
-#define STATERROR (RXBREAK | RXFRAME | RXPARITY)
-
-#define CTSFC_EN 0x80 /* CTS flow control enable bit */
-#define RTSTOG_EN 0x40 /* RTS toggle enable bit */
-#define TXINT_EN 0x10 /* transmit interrupt enable */
-#define STOP2 0x08 /* enable 2 stop bits (0 = 1 stop) */
-#define PARITY_EN 0x04 /* enable parity (0 = no parity) */
-#define EVEN_PAR 0x02 /* even parity (0 = odd parity) */
-#define DATA8BIT 0x01 /* 8 bit data (0 = 7 bit data) */
-
-#define SETBREAK 0x10 /* send break condition (must clear) */
-#define LOCALLOOP 0x08 /* local loopback set for test */
-#define SET_DTR 0x04 /* assert DTR */
-#define SET_RTS 0x02 /* assert RTS */
-#define TX_ENABLE 0x01 /* enable transmitter */
-
-#define RTSFC_EN 0x40 /* RTS flow control enable */
-#define RXPROC_EN 0x20 /* receive processor enable */
-#define TRIG_NO 0x00 /* Rx FIFO trigger level 0 (no trigger) */
-#define TRIG_1 0x08 /* trigger level 1 char */
-#define TRIG_1_2 0x10 /* trigger level 1/2 */
-#define TRIG_7_8 0x18 /* trigger level 7/8 */
-#define TRIG_MASK 0x18 /* trigger level mask */
-#define SRCINT_EN 0x04 /* special Rx condition interrupt enable */
-#define RXINT_EN 0x02 /* Rx interrupt enable */
-#define MCINT_EN 0x01 /* modem change interrupt enable */
-
-#define RXF_TRIG 0x20 /* Rx FIFO trigger level interrupt */
-#define TXFIFO_MT 0x10 /* Tx FIFO empty interrupt */
-#define SRC_INT 0x08 /* special receive condition interrupt */
-#define DELTA_CD 0x04 /* CD change interrupt */
-#define DELTA_CTS 0x02 /* CTS change interrupt */
-#define DELTA_DSR 0x01 /* DSR change interrupt */
-
-#define REP1W2_EN 0x10 /* replace byte 1 with 2 bytes enable */
-#define IGN2_EN 0x08 /* ignore byte 2 enable */
-#define IGN1_EN 0x04 /* ignore byte 1 enable */
-#define COMP2_EN 0x02 /* compare byte 2 enable */
-#define COMP1_EN 0x01 /* compare byte 1 enable */
-
-#define RESET_ALL 0x80 /* reset AIOP (all channels) */
-#define TXOVERIDE 0x40 /* Transmit software off override */
-#define RESETUART 0x20 /* reset channel's UART */
-#define RESTXFCNT 0x10 /* reset channel's Tx FIFO count register */
-#define RESRXFCNT 0x08 /* reset channel's Rx FIFO count register */
-
-#define INTSTAT0 0x01 /* AIOP 0 interrupt status */
-#define INTSTAT1 0x02 /* AIOP 1 interrupt status */
-#define INTSTAT2 0x04 /* AIOP 2 interrupt status */
-#define INTSTAT3 0x08 /* AIOP 3 interrupt status */
-
-#define INTR_EN 0x08 /* allow interrupts to host */
-#define INT_STROB 0x04 /* strobe and clear interrupt line (EOI) */
-
-/**************************************************************************
- MUDBAC remapped for PCI
-**************************************************************************/
-
-#define _CFG_INT_PCI 0x40
-#define _PCI_INT_FUNC 0x3A
-
-#define PCI_STROB 0x2000 /* bit 13 of int aiop register */
-#define INTR_EN_PCI 0x0010 /* allow interrupts to host */
-
-/*
- * Definitions for Universal PCI board registers
- */
-#define _PCI_9030_INT_CTRL 0x4c /* Offsets from BAR1 */
-#define _PCI_9030_GPIO_CTRL 0x54
-#define PCI_INT_CTRL_AIOP 0x0001
-#define PCI_GPIO_CTRL_8PORT 0x4000
-#define _PCI_9030_RING_IND 0xc0 /* Offsets from BAR1 */
-
-#define CHAN3_EN 0x08 /* enable AIOP 3 */
-#define CHAN2_EN 0x04 /* enable AIOP 2 */
-#define CHAN1_EN 0x02 /* enable AIOP 1 */
-#define CHAN0_EN 0x01 /* enable AIOP 0 */
-#define FREQ_DIS 0x00
-#define FREQ_274HZ 0x60
-#define FREQ_137HZ 0x50
-#define FREQ_69HZ 0x40
-#define FREQ_34HZ 0x30
-#define FREQ_17HZ 0x20
-#define FREQ_9HZ 0x10
-#define PERIODIC_ONLY 0x80 /* only PERIODIC interrupt */
-
-#define CHANINT_EN 0x0100 /* flags to enable/disable channel ints */
-
-#define RDATASIZE 72
-#define RREGDATASIZE 52
-
-/*
- * AIOP interrupt bits for ISA/PCI boards and UPCI boards.
- */
-#define AIOP_INTR_BIT_0 0x0001
-#define AIOP_INTR_BIT_1 0x0002
-#define AIOP_INTR_BIT_2 0x0004
-#define AIOP_INTR_BIT_3 0x0008
-
-#define AIOP_INTR_BITS ( \
- AIOP_INTR_BIT_0 \
- | AIOP_INTR_BIT_1 \
- | AIOP_INTR_BIT_2 \
- | AIOP_INTR_BIT_3)
-
-#define UPCI_AIOP_INTR_BIT_0 0x0004
-#define UPCI_AIOP_INTR_BIT_1 0x0020
-#define UPCI_AIOP_INTR_BIT_2 0x0100
-#define UPCI_AIOP_INTR_BIT_3 0x0800
-
-#define UPCI_AIOP_INTR_BITS ( \
- UPCI_AIOP_INTR_BIT_0 \
- | UPCI_AIOP_INTR_BIT_1 \
- | UPCI_AIOP_INTR_BIT_2 \
- | UPCI_AIOP_INTR_BIT_3)
-
-/* Controller level information structure */
-typedef struct {
- int CtlID;
- int CtlNum;
- int BusType;
- int boardType;
- int isUPCI;
- WordIO_t PCIIO;
- WordIO_t PCIIO2;
- ByteIO_t MBaseIO;
- ByteIO_t MReg1IO;
- ByteIO_t MReg2IO;
- ByteIO_t MReg3IO;
- Byte_t MReg2;
- Byte_t MReg3;
- int NumAiop;
- int AltChanRingIndicator;
- ByteIO_t UPCIRingInd;
- WordIO_t AiopIO[AIOP_CTL_SIZE];
- ByteIO_t AiopIntChanIO[AIOP_CTL_SIZE];
- int AiopID[AIOP_CTL_SIZE];
- int AiopNumChan[AIOP_CTL_SIZE];
- Word_t *AiopIntrBits;
-} CONTROLLER_T;
-
-typedef CONTROLLER_T CONTROLLER_t;
-
-/* Channel level information structure */
-typedef struct {
- CONTROLLER_T *CtlP;
- int AiopNum;
- int ChanID;
- int ChanNum;
- int rtsToggle;
-
- ByteIO_t Cmd;
- ByteIO_t IntChan;
- ByteIO_t IntMask;
- DWordIO_t IndexAddr;
- WordIO_t IndexData;
-
- WordIO_t TxRxData;
- WordIO_t ChanStat;
- WordIO_t TxRxCount;
- ByteIO_t IntID;
-
- Word_t TxFIFO;
- Word_t TxFIFOPtrs;
- Word_t RxFIFO;
- Word_t RxFIFOPtrs;
- Word_t TxPrioCnt;
- Word_t TxPrioPtr;
- Word_t TxPrioBuf;
-
- Byte_t R[RREGDATASIZE];
-
- Byte_t BaudDiv[4];
- Byte_t TxControl[4];
- Byte_t RxControl[4];
- Byte_t TxEnables[4];
- Byte_t TxCompare[4];
- Byte_t TxReplace1[4];
- Byte_t TxReplace2[4];
-} CHANNEL_T;
-
-typedef CHANNEL_T CHANNEL_t;
-typedef CHANNEL_T *CHANPTR_T;
-
-#define InterfaceModeRS232 0x00
-#define InterfaceModeRS422 0x08
-#define InterfaceModeRS485 0x10
-#define InterfaceModeRS232T 0x18
-
-/***************************************************************************
-Function: sClrBreak
-Purpose: Stop sending a transmit BREAK signal
-Call: sClrBreak(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sClrBreak(ChP) \
-do { \
- (ChP)->TxControl[3] &= ~SETBREAK; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sClrDTR
-Purpose: Clr the DTR output
-Call: sClrDTR(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sClrDTR(ChP) \
-do { \
- (ChP)->TxControl[3] &= ~SET_DTR; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sClrRTS
-Purpose: Clr the RTS output
-Call: sClrRTS(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sClrRTS(ChP) \
-do { \
- if ((ChP)->rtsToggle) break; \
- (ChP)->TxControl[3] &= ~SET_RTS; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sClrTxXOFF
-Purpose: Clear any existing transmit software flow control off condition
-Call: sClrTxXOFF(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sClrTxXOFF(ChP) \
-do { \
- sOutB((ChP)->Cmd,TXOVERIDE | (Byte_t)(ChP)->ChanNum); \
- sOutB((ChP)->Cmd,(Byte_t)(ChP)->ChanNum); \
-} while (0)
-
-/***************************************************************************
-Function: sCtlNumToCtlPtr
-Purpose: Convert a controller number to controller structure pointer
-Call: sCtlNumToCtlPtr(CtlNum)
- int CtlNum; Controller number
-Return: CONTROLLER_T *: Ptr to controller structure
-*/
-#define sCtlNumToCtlPtr(CTLNUM) &sController[CTLNUM]
-
-/***************************************************************************
-Function: sControllerEOI
-Purpose: Strobe the MUDBAC's End Of Interrupt bit.
-Call: sControllerEOI(CtlP)
- CONTROLLER_T *CtlP; Ptr to controller structure
-*/
-#define sControllerEOI(CTLP) sOutB((CTLP)->MReg2IO,(CTLP)->MReg2 | INT_STROB)
-
-/***************************************************************************
-Function: sPCIControllerEOI
-Purpose: Strobe the PCI End Of Interrupt bit.
- For the UPCI boards, toggle the AIOP interrupt enable bit
- (this was taken from the Windows driver).
-Call: sPCIControllerEOI(CtlP)
- CONTROLLER_T *CtlP; Ptr to controller structure
-*/
-#define sPCIControllerEOI(CTLP) \
-do { \
- if ((CTLP)->isUPCI) { \
- Word_t w = sInW((CTLP)->PCIIO); \
- sOutW((CTLP)->PCIIO, (w ^ PCI_INT_CTRL_AIOP)); \
- sOutW((CTLP)->PCIIO, w); \
- } \
- else { \
- sOutW((CTLP)->PCIIO, PCI_STROB); \
- } \
-} while (0)
-
-/***************************************************************************
-Function: sDisAiop
-Purpose: Disable I/O access to an AIOP
-Call: sDisAiop(CltP)
- CONTROLLER_T *CtlP; Ptr to controller structure
- int AiopNum; Number of AIOP on controller
-*/
-#define sDisAiop(CTLP,AIOPNUM) \
-do { \
- (CTLP)->MReg3 &= sBitMapClrTbl[AIOPNUM]; \
- sOutB((CTLP)->MReg3IO,(CTLP)->MReg3); \
-} while (0)
-
-/***************************************************************************
-Function: sDisCTSFlowCtl
-Purpose: Disable output flow control using CTS
-Call: sDisCTSFlowCtl(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sDisCTSFlowCtl(ChP) \
-do { \
- (ChP)->TxControl[2] &= ~CTSFC_EN; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sDisIXANY
-Purpose: Disable IXANY Software Flow Control
-Call: sDisIXANY(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sDisIXANY(ChP) \
-do { \
- (ChP)->R[0x0e] = 0x86; \
- out32((ChP)->IndexAddr,&(ChP)->R[0x0c]); \
-} while (0)
-
-/***************************************************************************
-Function: DisParity
-Purpose: Disable parity
-Call: sDisParity(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Comments: Function sSetParity() can be used in place of functions sEnParity(),
- sDisParity(), sSetOddParity(), and sSetEvenParity().
-*/
-#define sDisParity(ChP) \
-do { \
- (ChP)->TxControl[2] &= ~PARITY_EN; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sDisRTSToggle
-Purpose: Disable RTS toggle
-Call: sDisRTSToggle(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sDisRTSToggle(ChP) \
-do { \
- (ChP)->TxControl[2] &= ~RTSTOG_EN; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
- (ChP)->rtsToggle = 0; \
-} while (0)
-
-/***************************************************************************
-Function: sDisRxFIFO
-Purpose: Disable Rx FIFO
-Call: sDisRxFIFO(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sDisRxFIFO(ChP) \
-do { \
- (ChP)->R[0x32] = 0x0a; \
- out32((ChP)->IndexAddr,&(ChP)->R[0x30]); \
-} while (0)
-
-/***************************************************************************
-Function: sDisRxStatusMode
-Purpose: Disable the Rx status mode
-Call: sDisRxStatusMode(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Comments: This takes the channel out of the receive status mode. All
- subsequent reads of receive data using sReadRxWord() will return
- two data bytes.
-*/
-#define sDisRxStatusMode(ChP) sOutW((ChP)->ChanStat,0)
-
-/***************************************************************************
-Function: sDisTransmit
-Purpose: Disable transmit
-Call: sDisTransmit(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
- This disables movement of Tx data from the Tx FIFO into the 1 byte
- Tx buffer. Therefore there could be up to a 2 byte latency
- between the time sDisTransmit() is called and the transmit buffer
- and transmit shift register going completely empty.
-*/
-#define sDisTransmit(ChP) \
-do { \
- (ChP)->TxControl[3] &= ~TX_ENABLE; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sDisTxSoftFlowCtl
-Purpose: Disable Tx Software Flow Control
-Call: sDisTxSoftFlowCtl(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sDisTxSoftFlowCtl(ChP) \
-do { \
- (ChP)->R[0x06] = 0x8a; \
- out32((ChP)->IndexAddr,&(ChP)->R[0x04]); \
-} while (0)
-
-/***************************************************************************
-Function: sEnAiop
-Purpose: Enable I/O access to an AIOP
-Call: sEnAiop(CltP)
- CONTROLLER_T *CtlP; Ptr to controller structure
- int AiopNum; Number of AIOP on controller
-*/
-#define sEnAiop(CTLP,AIOPNUM) \
-do { \
- (CTLP)->MReg3 |= sBitMapSetTbl[AIOPNUM]; \
- sOutB((CTLP)->MReg3IO,(CTLP)->MReg3); \
-} while (0)
-
-/***************************************************************************
-Function: sEnCTSFlowCtl
-Purpose: Enable output flow control using CTS
-Call: sEnCTSFlowCtl(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sEnCTSFlowCtl(ChP) \
-do { \
- (ChP)->TxControl[2] |= CTSFC_EN; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sEnIXANY
-Purpose: Enable IXANY Software Flow Control
-Call: sEnIXANY(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sEnIXANY(ChP) \
-do { \
- (ChP)->R[0x0e] = 0x21; \
- out32((ChP)->IndexAddr,&(ChP)->R[0x0c]); \
-} while (0)
-
-/***************************************************************************
-Function: EnParity
-Purpose: Enable parity
-Call: sEnParity(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Comments: Function sSetParity() can be used in place of functions sEnParity(),
- sDisParity(), sSetOddParity(), and sSetEvenParity().
-
-Warnings: Before enabling parity odd or even parity should be chosen using
- functions sSetOddParity() or sSetEvenParity().
-*/
-#define sEnParity(ChP) \
-do { \
- (ChP)->TxControl[2] |= PARITY_EN; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sEnRTSToggle
-Purpose: Enable RTS toggle
-Call: sEnRTSToggle(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Comments: This function will disable RTS flow control and clear the RTS
- line to allow operation of RTS toggle.
-*/
-#define sEnRTSToggle(ChP) \
-do { \
- (ChP)->RxControl[2] &= ~RTSFC_EN; \
- out32((ChP)->IndexAddr,(ChP)->RxControl); \
- (ChP)->TxControl[2] |= RTSTOG_EN; \
- (ChP)->TxControl[3] &= ~SET_RTS; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
- (ChP)->rtsToggle = 1; \
-} while (0)
-
-/***************************************************************************
-Function: sEnRxFIFO
-Purpose: Enable Rx FIFO
-Call: sEnRxFIFO(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sEnRxFIFO(ChP) \
-do { \
- (ChP)->R[0x32] = 0x08; \
- out32((ChP)->IndexAddr,&(ChP)->R[0x30]); \
-} while (0)
-
-/***************************************************************************
-Function: sEnRxProcessor
-Purpose: Enable the receive processor
-Call: sEnRxProcessor(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Comments: This function is used to start the receive processor. When
- the channel is in the reset state the receive processor is not
- running. This is done to prevent the receive processor from
- executing invalid microcode instructions prior to the
- downloading of the microcode.
-
-Warnings: This function must be called after valid microcode has been
- downloaded to the AIOP, and it must not be called before the
- microcode has been downloaded.
-*/
-#define sEnRxProcessor(ChP) \
-do { \
- (ChP)->RxControl[2] |= RXPROC_EN; \
- out32((ChP)->IndexAddr,(ChP)->RxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sEnRxStatusMode
-Purpose: Enable the Rx status mode
-Call: sEnRxStatusMode(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Comments: This places the channel in the receive status mode. All subsequent
- reads of receive data using sReadRxWord() will return a data byte
- in the low word and a status byte in the high word.
-
-*/
-#define sEnRxStatusMode(ChP) sOutW((ChP)->ChanStat,STATMODE)
-
-/***************************************************************************
-Function: sEnTransmit
-Purpose: Enable transmit
-Call: sEnTransmit(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sEnTransmit(ChP) \
-do { \
- (ChP)->TxControl[3] |= TX_ENABLE; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sEnTxSoftFlowCtl
-Purpose: Enable Tx Software Flow Control
-Call: sEnTxSoftFlowCtl(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sEnTxSoftFlowCtl(ChP) \
-do { \
- (ChP)->R[0x06] = 0xc5; \
- out32((ChP)->IndexAddr,&(ChP)->R[0x04]); \
-} while (0)
-
-/***************************************************************************
-Function: sGetAiopIntStatus
-Purpose: Get the AIOP interrupt status
-Call: sGetAiopIntStatus(CtlP,AiopNum)
- CONTROLLER_T *CtlP; Ptr to controller structure
- int AiopNum; AIOP number
-Return: Byte_t: The AIOP interrupt status. Bits 0 through 7
- represent channels 0 through 7 respectively. If a
- bit is set that channel is interrupting.
-*/
-#define sGetAiopIntStatus(CTLP,AIOPNUM) sInB((CTLP)->AiopIntChanIO[AIOPNUM])
-
-/***************************************************************************
-Function: sGetAiopNumChan
-Purpose: Get the number of channels supported by an AIOP
-Call: sGetAiopNumChan(CtlP,AiopNum)
- CONTROLLER_T *CtlP; Ptr to controller structure
- int AiopNum; AIOP number
-Return: int: The number of channels supported by the AIOP
-*/
-#define sGetAiopNumChan(CTLP,AIOPNUM) (CTLP)->AiopNumChan[AIOPNUM]
-
-/***************************************************************************
-Function: sGetChanIntID
-Purpose: Get a channel's interrupt identification byte
-Call: sGetChanIntID(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Return: Byte_t: The channel interrupt ID. Can be any
- combination of the following flags:
- RXF_TRIG: Rx FIFO trigger level interrupt
- TXFIFO_MT: Tx FIFO empty interrupt
- SRC_INT: Special receive condition interrupt
- DELTA_CD: CD change interrupt
- DELTA_CTS: CTS change interrupt
- DELTA_DSR: DSR change interrupt
-*/
-#define sGetChanIntID(ChP) (sInB((ChP)->IntID) & (RXF_TRIG | TXFIFO_MT | SRC_INT | DELTA_CD | DELTA_CTS | DELTA_DSR))
-
-/***************************************************************************
-Function: sGetChanNum
-Purpose: Get the number of a channel within an AIOP
-Call: sGetChanNum(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Return: int: Channel number within AIOP, or NULLCHAN if channel does
- not exist.
-*/
-#define sGetChanNum(ChP) (ChP)->ChanNum
-
-/***************************************************************************
-Function: sGetChanStatus
-Purpose: Get the channel status
-Call: sGetChanStatus(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Return: Word_t: The channel status. Can be any combination of
- the following flags:
- LOW BYTE FLAGS
- CTS_ACT: CTS input asserted
- DSR_ACT: DSR input asserted
- CD_ACT: CD input asserted
- TXFIFOMT: Tx FIFO is empty
- TXSHRMT: Tx shift register is empty
- RDA: Rx data available
-
- HIGH BYTE FLAGS
- STATMODE: status mode enable bit
- RXFOVERFL: receive FIFO overflow
- RX2MATCH: receive compare byte 2 match
- RX1MATCH: receive compare byte 1 match
- RXBREAK: received BREAK
- RXFRAME: received framing error
- RXPARITY: received parity error
-Warnings: This function will clear the high byte flags in the Channel
- Status Register.
-*/
-#define sGetChanStatus(ChP) sInW((ChP)->ChanStat)
-
-/***************************************************************************
-Function: sGetChanStatusLo
-Purpose: Get the low byte only of the channel status
-Call: sGetChanStatusLo(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Return: Byte_t: The channel status low byte. Can be any combination
- of the following flags:
- CTS_ACT: CTS input asserted
- DSR_ACT: DSR input asserted
- CD_ACT: CD input asserted
- TXFIFOMT: Tx FIFO is empty
- TXSHRMT: Tx shift register is empty
- RDA: Rx data available
-*/
-#define sGetChanStatusLo(ChP) sInB((ByteIO_t)(ChP)->ChanStat)
-
-/**********************************************************************
- * Get RI status of channel
- * Defined as a function in rocket.c -aes
- */
-#if 0
-#define sGetChanRI(ChP) ((ChP)->CtlP->AltChanRingIndicator ? \
- (sInB((ByteIO_t)((ChP)->ChanStat+8)) & DSR_ACT) : \
- (((ChP)->CtlP->boardType == ROCKET_TYPE_PC104) ? \
- (!(sInB((ChP)->CtlP->AiopIO[3]) & sBitMapSetTbl[(ChP)->ChanNum])) : \
- 0))
-#endif
-
-/***************************************************************************
-Function: sGetControllerIntStatus
-Purpose: Get the controller interrupt status
-Call: sGetControllerIntStatus(CtlP)
- CONTROLLER_T *CtlP; Ptr to controller structure
-Return: Byte_t: The controller interrupt status in the lower 4
- bits. Bits 0 through 3 represent AIOP's 0
- through 3 respectively. If a bit is set that
- AIOP is interrupting. Bits 4 through 7 will
- always be cleared.
-*/
-#define sGetControllerIntStatus(CTLP) (sInB((CTLP)->MReg1IO) & 0x0f)
-
-/***************************************************************************
-Function: sPCIGetControllerIntStatus
-Purpose: Get the controller interrupt status
-Call: sPCIGetControllerIntStatus(CtlP)
- CONTROLLER_T *CtlP; Ptr to controller structure
-Return: unsigned char: The controller interrupt status in the lower 4
- bits and bit 4. Bits 0 through 3 represent AIOP's 0
- through 3 respectively. Bit 4 is set if the int
- was generated from periodic. If a bit is set the
- AIOP is interrupting.
-*/
-#define sPCIGetControllerIntStatus(CTLP) \
- ((CTLP)->isUPCI ? \
- (sInW((CTLP)->PCIIO2) & UPCI_AIOP_INTR_BITS) : \
- ((sInW((CTLP)->PCIIO) >> 8) & AIOP_INTR_BITS))
-
-/***************************************************************************
-
-Function: sGetRxCnt
-Purpose: Get the number of data bytes in the Rx FIFO
-Call: sGetRxCnt(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Return: int: The number of data bytes in the Rx FIFO.
-Comments: Byte read of count register is required to obtain Rx count.
-
-*/
-#define sGetRxCnt(ChP) sInW((ChP)->TxRxCount)
-
-/***************************************************************************
-Function: sGetTxCnt
-Purpose: Get the number of data bytes in the Tx FIFO
-Call: sGetTxCnt(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Return: Byte_t: The number of data bytes in the Tx FIFO.
-Comments: Byte read of count register is required to obtain Tx count.
-
-*/
-#define sGetTxCnt(ChP) sInB((ByteIO_t)(ChP)->TxRxCount)
-
-/*****************************************************************************
-Function: sGetTxRxDataIO
-Purpose: Get the I/O address of a channel's TxRx Data register
-Call: sGetTxRxDataIO(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Return: WordIO_t: I/O address of a channel's TxRx Data register
-*/
-#define sGetTxRxDataIO(ChP) (ChP)->TxRxData
-
-/***************************************************************************
-Function: sInitChanDefaults
-Purpose: Initialize a channel structure to it's default state.
-Call: sInitChanDefaults(ChP)
- CHANNEL_T *ChP; Ptr to the channel structure
-Comments: This function must be called once for every channel structure
- that exists before any other SSCI calls can be made.
-
-*/
-#define sInitChanDefaults(ChP) \
-do { \
- (ChP)->CtlP = NULLCTLPTR; \
- (ChP)->AiopNum = NULLAIOP; \
- (ChP)->ChanID = AIOPID_NULL; \
- (ChP)->ChanNum = NULLCHAN; \
-} while (0)
-
-/***************************************************************************
-Function: sResetAiopByNum
-Purpose: Reset the AIOP by number
-Call: sResetAiopByNum(CTLP,AIOPNUM)
- CONTROLLER_T CTLP; Ptr to controller structure
- AIOPNUM; AIOP index
-*/
-#define sResetAiopByNum(CTLP,AIOPNUM) \
-do { \
- sOutB((CTLP)->AiopIO[(AIOPNUM)]+_CMD_REG,RESET_ALL); \
- sOutB((CTLP)->AiopIO[(AIOPNUM)]+_CMD_REG,0x0); \
-} while (0)
-
-/***************************************************************************
-Function: sSendBreak
-Purpose: Send a transmit BREAK signal
-Call: sSendBreak(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sSendBreak(ChP) \
-do { \
- (ChP)->TxControl[3] |= SETBREAK; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sSetBaud
-Purpose: Set baud rate
-Call: sSetBaud(ChP,Divisor)
- CHANNEL_T *ChP; Ptr to channel structure
- Word_t Divisor; 16 bit baud rate divisor for channel
-*/
-#define sSetBaud(ChP,DIVISOR) \
-do { \
- (ChP)->BaudDiv[2] = (Byte_t)(DIVISOR); \
- (ChP)->BaudDiv[3] = (Byte_t)((DIVISOR) >> 8); \
- out32((ChP)->IndexAddr,(ChP)->BaudDiv); \
-} while (0)
-
-/***************************************************************************
-Function: sSetData7
-Purpose: Set data bits to 7
-Call: sSetData7(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sSetData7(ChP) \
-do { \
- (ChP)->TxControl[2] &= ~DATA8BIT; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sSetData8
-Purpose: Set data bits to 8
-Call: sSetData8(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sSetData8(ChP) \
-do { \
- (ChP)->TxControl[2] |= DATA8BIT; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sSetDTR
-Purpose: Set the DTR output
-Call: sSetDTR(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sSetDTR(ChP) \
-do { \
- (ChP)->TxControl[3] |= SET_DTR; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sSetEvenParity
-Purpose: Set even parity
-Call: sSetEvenParity(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Comments: Function sSetParity() can be used in place of functions sEnParity(),
- sDisParity(), sSetOddParity(), and sSetEvenParity().
-
-Warnings: This function has no effect unless parity is enabled with function
- sEnParity().
-*/
-#define sSetEvenParity(ChP) \
-do { \
- (ChP)->TxControl[2] |= EVEN_PAR; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sSetOddParity
-Purpose: Set odd parity
-Call: sSetOddParity(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Comments: Function sSetParity() can be used in place of functions sEnParity(),
- sDisParity(), sSetOddParity(), and sSetEvenParity().
-
-Warnings: This function has no effect unless parity is enabled with function
- sEnParity().
-*/
-#define sSetOddParity(ChP) \
-do { \
- (ChP)->TxControl[2] &= ~EVEN_PAR; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sSetRTS
-Purpose: Set the RTS output
-Call: sSetRTS(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sSetRTS(ChP) \
-do { \
- if ((ChP)->rtsToggle) break; \
- (ChP)->TxControl[3] |= SET_RTS; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sSetRxTrigger
-Purpose: Set the Rx FIFO trigger level
-Call: sSetRxProcessor(ChP,Level)
- CHANNEL_T *ChP; Ptr to channel structure
- Byte_t Level; Number of characters in Rx FIFO at which the
- interrupt will be generated. Can be any of the following flags:
-
- TRIG_NO: no trigger
- TRIG_1: 1 character in FIFO
- TRIG_1_2: FIFO 1/2 full
- TRIG_7_8: FIFO 7/8 full
-Comments: An interrupt will be generated when the trigger level is reached
- only if function sEnInterrupt() has been called with flag
- RXINT_EN set. The RXF_TRIG flag in the Interrupt Idenfification
- register will be set whenever the trigger level is reached
- regardless of the setting of RXINT_EN.
-
-*/
-#define sSetRxTrigger(ChP,LEVEL) \
-do { \
- (ChP)->RxControl[2] &= ~TRIG_MASK; \
- (ChP)->RxControl[2] |= LEVEL; \
- out32((ChP)->IndexAddr,(ChP)->RxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sSetStop1
-Purpose: Set stop bits to 1
-Call: sSetStop1(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sSetStop1(ChP) \
-do { \
- (ChP)->TxControl[2] &= ~STOP2; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sSetStop2
-Purpose: Set stop bits to 2
-Call: sSetStop2(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-*/
-#define sSetStop2(ChP) \
-do { \
- (ChP)->TxControl[2] |= STOP2; \
- out32((ChP)->IndexAddr,(ChP)->TxControl); \
-} while (0)
-
-/***************************************************************************
-Function: sSetTxXOFFChar
-Purpose: Set the Tx XOFF flow control character
-Call: sSetTxXOFFChar(ChP,Ch)
- CHANNEL_T *ChP; Ptr to channel structure
- Byte_t Ch; The value to set the Tx XOFF character to
-*/
-#define sSetTxXOFFChar(ChP,CH) \
-do { \
- (ChP)->R[0x07] = (CH); \
- out32((ChP)->IndexAddr,&(ChP)->R[0x04]); \
-} while (0)
-
-/***************************************************************************
-Function: sSetTxXONChar
-Purpose: Set the Tx XON flow control character
-Call: sSetTxXONChar(ChP,Ch)
- CHANNEL_T *ChP; Ptr to channel structure
- Byte_t Ch; The value to set the Tx XON character to
-*/
-#define sSetTxXONChar(ChP,CH) \
-do { \
- (ChP)->R[0x0b] = (CH); \
- out32((ChP)->IndexAddr,&(ChP)->R[0x08]); \
-} while (0)
-
-/***************************************************************************
-Function: sStartRxProcessor
-Purpose: Start a channel's receive processor
-Call: sStartRxProcessor(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
-Comments: This function is used to start a Rx processor after it was
- stopped with sStopRxProcessor() or sStopSWInFlowCtl(). It
- will restart both the Rx processor and software input flow control.
-
-*/
-#define sStartRxProcessor(ChP) out32((ChP)->IndexAddr,&(ChP)->R[0])
-
-/***************************************************************************
-Function: sWriteTxByte
-Purpose: Write a transmit data byte to a channel.
- ByteIO_t io: Channel transmit register I/O address. This can
- be obtained with sGetTxRxDataIO().
- Byte_t Data; The transmit data byte.
-Warnings: This function writes the data byte without checking to see if
- sMaxTxSize is exceeded in the Tx FIFO.
-*/
-#define sWriteTxByte(IO,DATA) sOutB(IO,DATA)
-
-/*
- * Begin Linux specific definitions for the Rocketport driver
- *
- * This code is Copyright Theodore Ts'o, 1995-1997
- */
-
-struct r_port {
- int magic;
- struct tty_port port;
- int line;
- int flags; /* Don't yet match the ASY_ flags!! */
- unsigned int board:3;
- unsigned int aiop:2;
- unsigned int chan:3;
- CONTROLLER_t *ctlp;
- CHANNEL_t channel;
- int intmask;
- int xmit_fifo_room; /* room in xmit fifo */
- unsigned char *xmit_buf;
- int xmit_head;
- int xmit_tail;
- int xmit_cnt;
- int cd_status;
- int ignore_status_mask;
- int read_status_mask;
- int cps;
-
- struct completion close_wait; /* Not yet matching the core */
- spinlock_t slock;
- struct mutex write_mtx;
-};
-
-#define RPORT_MAGIC 0x525001
-
-#define NUM_BOARDS 8
-#define MAX_RP_PORTS (32*NUM_BOARDS)
-
-/*
- * The size of the xmit buffer is 1 page, or 4096 bytes
- */
-#define XMIT_BUF_SIZE 4096
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS 256
-
-/*
- * Assigned major numbers for the Comtrol Rocketport
- */
-#define TTY_ROCKET_MAJOR 46
-#define CUA_ROCKET_MAJOR 47
-
-#ifdef PCI_VENDOR_ID_RP
-#undef PCI_VENDOR_ID_RP
-#undef PCI_DEVICE_ID_RP8OCTA
-#undef PCI_DEVICE_ID_RP8INTF
-#undef PCI_DEVICE_ID_RP16INTF
-#undef PCI_DEVICE_ID_RP32INTF
-#undef PCI_DEVICE_ID_URP8OCTA
-#undef PCI_DEVICE_ID_URP8INTF
-#undef PCI_DEVICE_ID_URP16INTF
-#undef PCI_DEVICE_ID_CRP16INTF
-#undef PCI_DEVICE_ID_URP32INTF
-#endif
-
-/* Comtrol PCI Vendor ID */
-#define PCI_VENDOR_ID_RP 0x11fe
-
-/* Comtrol Device ID's */
-#define PCI_DEVICE_ID_RP32INTF 0x0001 /* Rocketport 32 port w/external I/F */
-#define PCI_DEVICE_ID_RP8INTF 0x0002 /* Rocketport 8 port w/external I/F */
-#define PCI_DEVICE_ID_RP16INTF 0x0003 /* Rocketport 16 port w/external I/F */
-#define PCI_DEVICE_ID_RP4QUAD 0x0004 /* Rocketport 4 port w/quad cable */
-#define PCI_DEVICE_ID_RP8OCTA 0x0005 /* Rocketport 8 port w/octa cable */
-#define PCI_DEVICE_ID_RP8J 0x0006 /* Rocketport 8 port w/RJ11 connectors */
-#define PCI_DEVICE_ID_RP4J 0x0007 /* Rocketport 4 port w/RJ11 connectors */
-#define PCI_DEVICE_ID_RP8SNI 0x0008 /* Rocketport 8 port w/ DB78 SNI (Siemens) connector */
-#define PCI_DEVICE_ID_RP16SNI 0x0009 /* Rocketport 16 port w/ DB78 SNI (Siemens) connector */
-#define PCI_DEVICE_ID_RPP4 0x000A /* Rocketport Plus 4 port */
-#define PCI_DEVICE_ID_RPP8 0x000B /* Rocketport Plus 8 port */
-#define PCI_DEVICE_ID_RP6M 0x000C /* RocketModem 6 port */
-#define PCI_DEVICE_ID_RP4M 0x000D /* RocketModem 4 port */
-#define PCI_DEVICE_ID_RP2_232 0x000E /* Rocketport Plus 2 port RS232 */
-#define PCI_DEVICE_ID_RP2_422 0x000F /* Rocketport Plus 2 port RS422 */
-
-/* Universal PCI boards */
-#define PCI_DEVICE_ID_URP32INTF 0x0801 /* Rocketport UPCI 32 port w/external I/F */
-#define PCI_DEVICE_ID_URP8INTF 0x0802 /* Rocketport UPCI 8 port w/external I/F */
-#define PCI_DEVICE_ID_URP16INTF 0x0803 /* Rocketport UPCI 16 port w/external I/F */
-#define PCI_DEVICE_ID_URP8OCTA 0x0805 /* Rocketport UPCI 8 port w/octa cable */
-#define PCI_DEVICE_ID_UPCI_RM3_8PORT 0x080C /* Rocketmodem III 8 port */
-#define PCI_DEVICE_ID_UPCI_RM3_4PORT 0x080D /* Rocketmodem III 4 port */
-
-/* Compact PCI device */
-#define PCI_DEVICE_ID_CRP16INTF 0x0903 /* Rocketport Compact PCI 16 port w/external I/F */
-
+++ /dev/null
-/*
- * linux/drivers/char/synclink.c
- *
- * $Id: synclink.c,v 4.38 2005/11/07 16:30:34 paulkf Exp $
- *
- * Device driver for Microgate SyncLink ISA and PCI
- * high speed multiprotocol serial adapters.
- *
- * written by Paul Fulghum for Microgate Corporation
- * paulkf@microgate.com
- *
- * Microgate and SyncLink are trademarks of Microgate Corporation
- *
- * Derived from serial.c written by Theodore Ts'o and Linus Torvalds
- *
- * Original release 01/11/99
- *
- * This code is released under the GNU General Public License (GPL)
- *
- * This driver is primarily intended for use in synchronous
- * HDLC mode. Asynchronous mode is also provided.
- *
- * When operating in synchronous mode, each call to mgsl_write()
- * contains exactly one complete HDLC frame. Calling mgsl_put_char
- * will start assembling an HDLC frame that will not be sent until
- * mgsl_flush_chars or mgsl_write is called.
- *
- * Synchronous receive data is reported as complete frames. To accomplish
- * this, the TTY flip buffer is bypassed (too small to hold largest
- * frame and may fragment frames) and the line discipline
- * receive entry point is called directly.
- *
- * This driver has been tested with a slightly modified ppp.c driver
- * for synchronous PPP.
- *
- * 2000/02/16
- * Added interface for syncppp.c driver (an alternate synchronous PPP
- * implementation that also supports Cisco HDLC). Each device instance
- * registers as a tty device AND a network device (if dosyncppp option
- * is set for the device). The functionality is determined by which
- * device interface is opened.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#if defined(__i386__)
-# define BREAKPOINT() asm(" int $3");
-#else
-# define BREAKPOINT() { }
-#endif
-
-#define MAX_ISA_DEVICES 10
-#define MAX_PCI_DEVICES 10
-#define MAX_TOTAL_DEVICES 20
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/mm.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/vmalloc.h>
-#include <linux/init.h>
-#include <linux/ioctl.h>
-#include <linux/synclink.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/dma.h>
-#include <linux/bitops.h>
-#include <asm/types.h>
-#include <linux/termios.h>
-#include <linux/workqueue.h>
-#include <linux/hdlc.h>
-#include <linux/dma-mapping.h>
-
-#if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_MODULE))
-#define SYNCLINK_GENERIC_HDLC 1
-#else
-#define SYNCLINK_GENERIC_HDLC 0
-#endif
-
-#define GET_USER(error,value,addr) error = get_user(value,addr)
-#define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
-#define PUT_USER(error,value,addr) error = put_user(value,addr)
-#define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
-
-#include <asm/uaccess.h>
-
-#define RCLRVALUE 0xffff
-
-static MGSL_PARAMS default_params = {
- MGSL_MODE_HDLC, /* unsigned long mode */
- 0, /* unsigned char loopback; */
- HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
- HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
- 0, /* unsigned long clock_speed; */
- 0xff, /* unsigned char addr_filter; */
- HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
- HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
- HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
- 9600, /* unsigned long data_rate; */
- 8, /* unsigned char data_bits; */
- 1, /* unsigned char stop_bits; */
- ASYNC_PARITY_NONE /* unsigned char parity; */
-};
-
-#define SHARED_MEM_ADDRESS_SIZE 0x40000
-#define BUFFERLISTSIZE 4096
-#define DMABUFFERSIZE 4096
-#define MAXRXFRAMES 7
-
-typedef struct _DMABUFFERENTRY
-{
- u32 phys_addr; /* 32-bit flat physical address of data buffer */
- volatile u16 count; /* buffer size/data count */
- volatile u16 status; /* Control/status field */
- volatile u16 rcc; /* character count field */
- u16 reserved; /* padding required by 16C32 */
- u32 link; /* 32-bit flat link to next buffer entry */
- char *virt_addr; /* virtual address of data buffer */
- u32 phys_entry; /* physical address of this buffer entry */
- dma_addr_t dma_addr;
-} DMABUFFERENTRY, *DMAPBUFFERENTRY;
-
-/* The queue of BH actions to be performed */
-
-#define BH_RECEIVE 1
-#define BH_TRANSMIT 2
-#define BH_STATUS 4
-
-#define IO_PIN_SHUTDOWN_LIMIT 100
-
-struct _input_signal_events {
- int ri_up;
- int ri_down;
- int dsr_up;
- int dsr_down;
- int dcd_up;
- int dcd_down;
- int cts_up;
- int cts_down;
-};
-
-/* transmit holding buffer definitions*/
-#define MAX_TX_HOLDING_BUFFERS 5
-struct tx_holding_buffer {
- int buffer_size;
- unsigned char * buffer;
-};
-
-
-/*
- * Device instance data structure
- */
-
-struct mgsl_struct {
- int magic;
- struct tty_port port;
- int line;
- int hw_version;
-
- struct mgsl_icount icount;
-
- int timeout;
- int x_char; /* xon/xoff character */
- u16 read_status_mask;
- u16 ignore_status_mask;
- unsigned char *xmit_buf;
- int xmit_head;
- int xmit_tail;
- int xmit_cnt;
-
- wait_queue_head_t status_event_wait_q;
- wait_queue_head_t event_wait_q;
- struct timer_list tx_timer; /* HDLC transmit timeout timer */
- struct mgsl_struct *next_device; /* device list link */
-
- spinlock_t irq_spinlock; /* spinlock for synchronizing with ISR */
- struct work_struct task; /* task structure for scheduling bh */
-
- u32 EventMask; /* event trigger mask */
- u32 RecordedEvents; /* pending events */
-
- u32 max_frame_size; /* as set by device config */
-
- u32 pending_bh;
-
- bool bh_running; /* Protection from multiple */
- int isr_overflow;
- bool bh_requested;
-
- int dcd_chkcount; /* check counts to prevent */
- int cts_chkcount; /* too many IRQs if a signal */
- int dsr_chkcount; /* is floating */
- int ri_chkcount;
-
- char *buffer_list; /* virtual address of Rx & Tx buffer lists */
- u32 buffer_list_phys;
- dma_addr_t buffer_list_dma_addr;
-
- unsigned int rx_buffer_count; /* count of total allocated Rx buffers */
- DMABUFFERENTRY *rx_buffer_list; /* list of receive buffer entries */
- unsigned int current_rx_buffer;
-
- int num_tx_dma_buffers; /* number of tx dma frames required */
- int tx_dma_buffers_used;
- unsigned int tx_buffer_count; /* count of total allocated Tx buffers */
- DMABUFFERENTRY *tx_buffer_list; /* list of transmit buffer entries */
- int start_tx_dma_buffer; /* tx dma buffer to start tx dma operation */
- int current_tx_buffer; /* next tx dma buffer to be loaded */
-
- unsigned char *intermediate_rxbuffer;
-
- int num_tx_holding_buffers; /* number of tx holding buffer allocated */
- int get_tx_holding_index; /* next tx holding buffer for adapter to load */
- int put_tx_holding_index; /* next tx holding buffer to store user request */
- int tx_holding_count; /* number of tx holding buffers waiting */
- struct tx_holding_buffer tx_holding_buffers[MAX_TX_HOLDING_BUFFERS];
-
- bool rx_enabled;
- bool rx_overflow;
- bool rx_rcc_underrun;
-
- bool tx_enabled;
- bool tx_active;
- u32 idle_mode;
-
- u16 cmr_value;
- u16 tcsr_value;
-
- char device_name[25]; /* device instance name */
-
- unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */
- unsigned char bus; /* expansion bus number (zero based) */
- unsigned char function; /* PCI device number */
-
- unsigned int io_base; /* base I/O address of adapter */
- unsigned int io_addr_size; /* size of the I/O address range */
- bool io_addr_requested; /* true if I/O address requested */
-
- unsigned int irq_level; /* interrupt level */
- unsigned long irq_flags;
- bool irq_requested; /* true if IRQ requested */
-
- unsigned int dma_level; /* DMA channel */
- bool dma_requested; /* true if dma channel requested */
-
- u16 mbre_bit;
- u16 loopback_bits;
- u16 usc_idle_mode;
-
- MGSL_PARAMS params; /* communications parameters */
-
- unsigned char serial_signals; /* current serial signal states */
-
- bool irq_occurred; /* for diagnostics use */
- unsigned int init_error; /* Initialization startup error (DIAGS) */
- int fDiagnosticsmode; /* Driver in Diagnostic mode? (DIAGS) */
-
- u32 last_mem_alloc;
- unsigned char* memory_base; /* shared memory address (PCI only) */
- u32 phys_memory_base;
- bool shared_mem_requested;
-
- unsigned char* lcr_base; /* local config registers (PCI only) */
- u32 phys_lcr_base;
- u32 lcr_offset;
- bool lcr_mem_requested;
-
- u32 misc_ctrl_value;
- char flag_buf[MAX_ASYNC_BUFFER_SIZE];
- char char_buf[MAX_ASYNC_BUFFER_SIZE];
- bool drop_rts_on_tx_done;
-
- bool loopmode_insert_requested;
- bool loopmode_send_done_requested;
-
- struct _input_signal_events input_signal_events;
-
- /* generic HDLC device parts */
- int netcount;
- spinlock_t netlock;
-
-#if SYNCLINK_GENERIC_HDLC
- struct net_device *netdev;
-#endif
-};
-
-#define MGSL_MAGIC 0x5401
-
-/*
- * The size of the serial xmit buffer is 1 page, or 4096 bytes
- */
-#ifndef SERIAL_XMIT_SIZE
-#define SERIAL_XMIT_SIZE 4096
-#endif
-
-/*
- * These macros define the offsets used in calculating the
- * I/O address of the specified USC registers.
- */
-
-
-#define DCPIN 2 /* Bit 1 of I/O address */
-#define SDPIN 4 /* Bit 2 of I/O address */
-
-#define DCAR 0 /* DMA command/address register */
-#define CCAR SDPIN /* channel command/address register */
-#define DATAREG DCPIN + SDPIN /* serial data register */
-#define MSBONLY 0x41
-#define LSBONLY 0x40
-
-/*
- * These macros define the register address (ordinal number)
- * used for writing address/value pairs to the USC.
- */
-
-#define CMR 0x02 /* Channel mode Register */
-#define CCSR 0x04 /* Channel Command/status Register */
-#define CCR 0x06 /* Channel Control Register */
-#define PSR 0x08 /* Port status Register */
-#define PCR 0x0a /* Port Control Register */
-#define TMDR 0x0c /* Test mode Data Register */
-#define TMCR 0x0e /* Test mode Control Register */
-#define CMCR 0x10 /* Clock mode Control Register */
-#define HCR 0x12 /* Hardware Configuration Register */
-#define IVR 0x14 /* Interrupt Vector Register */
-#define IOCR 0x16 /* Input/Output Control Register */
-#define ICR 0x18 /* Interrupt Control Register */
-#define DCCR 0x1a /* Daisy Chain Control Register */
-#define MISR 0x1c /* Misc Interrupt status Register */
-#define SICR 0x1e /* status Interrupt Control Register */
-#define RDR 0x20 /* Receive Data Register */
-#define RMR 0x22 /* Receive mode Register */
-#define RCSR 0x24 /* Receive Command/status Register */
-#define RICR 0x26 /* Receive Interrupt Control Register */
-#define RSR 0x28 /* Receive Sync Register */
-#define RCLR 0x2a /* Receive count Limit Register */
-#define RCCR 0x2c /* Receive Character count Register */
-#define TC0R 0x2e /* Time Constant 0 Register */
-#define TDR 0x30 /* Transmit Data Register */
-#define TMR 0x32 /* Transmit mode Register */
-#define TCSR 0x34 /* Transmit Command/status Register */
-#define TICR 0x36 /* Transmit Interrupt Control Register */
-#define TSR 0x38 /* Transmit Sync Register */
-#define TCLR 0x3a /* Transmit count Limit Register */
-#define TCCR 0x3c /* Transmit Character count Register */
-#define TC1R 0x3e /* Time Constant 1 Register */
-
-
-/*
- * MACRO DEFINITIONS FOR DMA REGISTERS
- */
-
-#define DCR 0x06 /* DMA Control Register (shared) */
-#define DACR 0x08 /* DMA Array count Register (shared) */
-#define BDCR 0x12 /* Burst/Dwell Control Register (shared) */
-#define DIVR 0x14 /* DMA Interrupt Vector Register (shared) */
-#define DICR 0x18 /* DMA Interrupt Control Register (shared) */
-#define CDIR 0x1a /* Clear DMA Interrupt Register (shared) */
-#define SDIR 0x1c /* Set DMA Interrupt Register (shared) */
-
-#define TDMR 0x02 /* Transmit DMA mode Register */
-#define TDIAR 0x1e /* Transmit DMA Interrupt Arm Register */
-#define TBCR 0x2a /* Transmit Byte count Register */
-#define TARL 0x2c /* Transmit Address Register (low) */
-#define TARU 0x2e /* Transmit Address Register (high) */
-#define NTBCR 0x3a /* Next Transmit Byte count Register */
-#define NTARL 0x3c /* Next Transmit Address Register (low) */
-#define NTARU 0x3e /* Next Transmit Address Register (high) */
-
-#define RDMR 0x82 /* Receive DMA mode Register (non-shared) */
-#define RDIAR 0x9e /* Receive DMA Interrupt Arm Register */
-#define RBCR 0xaa /* Receive Byte count Register */
-#define RARL 0xac /* Receive Address Register (low) */
-#define RARU 0xae /* Receive Address Register (high) */
-#define NRBCR 0xba /* Next Receive Byte count Register */
-#define NRARL 0xbc /* Next Receive Address Register (low) */
-#define NRARU 0xbe /* Next Receive Address Register (high) */
-
-
-/*
- * MACRO DEFINITIONS FOR MODEM STATUS BITS
- */
-
-#define MODEMSTATUS_DTR 0x80
-#define MODEMSTATUS_DSR 0x40
-#define MODEMSTATUS_RTS 0x20
-#define MODEMSTATUS_CTS 0x10
-#define MODEMSTATUS_RI 0x04
-#define MODEMSTATUS_DCD 0x01
-
-
-/*
- * Channel Command/Address Register (CCAR) Command Codes
- */
-
-#define RTCmd_Null 0x0000
-#define RTCmd_ResetHighestIus 0x1000
-#define RTCmd_TriggerChannelLoadDma 0x2000
-#define RTCmd_TriggerRxDma 0x2800
-#define RTCmd_TriggerTxDma 0x3000
-#define RTCmd_TriggerRxAndTxDma 0x3800
-#define RTCmd_PurgeRxFifo 0x4800
-#define RTCmd_PurgeTxFifo 0x5000
-#define RTCmd_PurgeRxAndTxFifo 0x5800
-#define RTCmd_LoadRcc 0x6800
-#define RTCmd_LoadTcc 0x7000
-#define RTCmd_LoadRccAndTcc 0x7800
-#define RTCmd_LoadTC0 0x8800
-#define RTCmd_LoadTC1 0x9000
-#define RTCmd_LoadTC0AndTC1 0x9800
-#define RTCmd_SerialDataLSBFirst 0xa000
-#define RTCmd_SerialDataMSBFirst 0xa800
-#define RTCmd_SelectBigEndian 0xb000
-#define RTCmd_SelectLittleEndian 0xb800
-
-
-/*
- * DMA Command/Address Register (DCAR) Command Codes
- */
-
-#define DmaCmd_Null 0x0000
-#define DmaCmd_ResetTxChannel 0x1000
-#define DmaCmd_ResetRxChannel 0x1200
-#define DmaCmd_StartTxChannel 0x2000
-#define DmaCmd_StartRxChannel 0x2200
-#define DmaCmd_ContinueTxChannel 0x3000
-#define DmaCmd_ContinueRxChannel 0x3200
-#define DmaCmd_PauseTxChannel 0x4000
-#define DmaCmd_PauseRxChannel 0x4200
-#define DmaCmd_AbortTxChannel 0x5000
-#define DmaCmd_AbortRxChannel 0x5200
-#define DmaCmd_InitTxChannel 0x7000
-#define DmaCmd_InitRxChannel 0x7200
-#define DmaCmd_ResetHighestDmaIus 0x8000
-#define DmaCmd_ResetAllChannels 0x9000
-#define DmaCmd_StartAllChannels 0xa000
-#define DmaCmd_ContinueAllChannels 0xb000
-#define DmaCmd_PauseAllChannels 0xc000
-#define DmaCmd_AbortAllChannels 0xd000
-#define DmaCmd_InitAllChannels 0xf000
-
-#define TCmd_Null 0x0000
-#define TCmd_ClearTxCRC 0x2000
-#define TCmd_SelectTicrTtsaData 0x4000
-#define TCmd_SelectTicrTxFifostatus 0x5000
-#define TCmd_SelectTicrIntLevel 0x6000
-#define TCmd_SelectTicrdma_level 0x7000
-#define TCmd_SendFrame 0x8000
-#define TCmd_SendAbort 0x9000
-#define TCmd_EnableDleInsertion 0xc000
-#define TCmd_DisableDleInsertion 0xd000
-#define TCmd_ClearEofEom 0xe000
-#define TCmd_SetEofEom 0xf000
-
-#define RCmd_Null 0x0000
-#define RCmd_ClearRxCRC 0x2000
-#define RCmd_EnterHuntmode 0x3000
-#define RCmd_SelectRicrRtsaData 0x4000
-#define RCmd_SelectRicrRxFifostatus 0x5000
-#define RCmd_SelectRicrIntLevel 0x6000
-#define RCmd_SelectRicrdma_level 0x7000
-
-/*
- * Bits for enabling and disabling IRQs in Interrupt Control Register (ICR)
- */
-
-#define RECEIVE_STATUS BIT5
-#define RECEIVE_DATA BIT4
-#define TRANSMIT_STATUS BIT3
-#define TRANSMIT_DATA BIT2
-#define IO_PIN BIT1
-#define MISC BIT0
-
-
-/*
- * Receive status Bits in Receive Command/status Register RCSR
- */
-
-#define RXSTATUS_SHORT_FRAME BIT8
-#define RXSTATUS_CODE_VIOLATION BIT8
-#define RXSTATUS_EXITED_HUNT BIT7
-#define RXSTATUS_IDLE_RECEIVED BIT6
-#define RXSTATUS_BREAK_RECEIVED BIT5
-#define RXSTATUS_ABORT_RECEIVED BIT5
-#define RXSTATUS_RXBOUND BIT4
-#define RXSTATUS_CRC_ERROR BIT3
-#define RXSTATUS_FRAMING_ERROR BIT3
-#define RXSTATUS_ABORT BIT2
-#define RXSTATUS_PARITY_ERROR BIT2
-#define RXSTATUS_OVERRUN BIT1
-#define RXSTATUS_DATA_AVAILABLE BIT0
-#define RXSTATUS_ALL 0x01f6
-#define usc_UnlatchRxstatusBits(a,b) usc_OutReg( (a), RCSR, (u16)((b) & RXSTATUS_ALL) )
-
-/*
- * Values for setting transmit idle mode in
- * Transmit Control/status Register (TCSR)
- */
-#define IDLEMODE_FLAGS 0x0000
-#define IDLEMODE_ALT_ONE_ZERO 0x0100
-#define IDLEMODE_ZERO 0x0200
-#define IDLEMODE_ONE 0x0300
-#define IDLEMODE_ALT_MARK_SPACE 0x0500
-#define IDLEMODE_SPACE 0x0600
-#define IDLEMODE_MARK 0x0700
-#define IDLEMODE_MASK 0x0700
-
-/*
- * IUSC revision identifiers
- */
-#define IUSC_SL1660 0x4d44
-#define IUSC_PRE_SL1660 0x4553
-
-/*
- * Transmit status Bits in Transmit Command/status Register (TCSR)
- */
-
-#define TCSR_PRESERVE 0x0F00
-
-#define TCSR_UNDERWAIT BIT11
-#define TXSTATUS_PREAMBLE_SENT BIT7
-#define TXSTATUS_IDLE_SENT BIT6
-#define TXSTATUS_ABORT_SENT BIT5
-#define TXSTATUS_EOF_SENT BIT4
-#define TXSTATUS_EOM_SENT BIT4
-#define TXSTATUS_CRC_SENT BIT3
-#define TXSTATUS_ALL_SENT BIT2
-#define TXSTATUS_UNDERRUN BIT1
-#define TXSTATUS_FIFO_EMPTY BIT0
-#define TXSTATUS_ALL 0x00fa
-#define usc_UnlatchTxstatusBits(a,b) usc_OutReg( (a), TCSR, (u16)((a)->tcsr_value + ((b) & 0x00FF)) )
-
-
-#define MISCSTATUS_RXC_LATCHED BIT15
-#define MISCSTATUS_RXC BIT14
-#define MISCSTATUS_TXC_LATCHED BIT13
-#define MISCSTATUS_TXC BIT12
-#define MISCSTATUS_RI_LATCHED BIT11
-#define MISCSTATUS_RI BIT10
-#define MISCSTATUS_DSR_LATCHED BIT9
-#define MISCSTATUS_DSR BIT8
-#define MISCSTATUS_DCD_LATCHED BIT7
-#define MISCSTATUS_DCD BIT6
-#define MISCSTATUS_CTS_LATCHED BIT5
-#define MISCSTATUS_CTS BIT4
-#define MISCSTATUS_RCC_UNDERRUN BIT3
-#define MISCSTATUS_DPLL_NO_SYNC BIT2
-#define MISCSTATUS_BRG1_ZERO BIT1
-#define MISCSTATUS_BRG0_ZERO BIT0
-
-#define usc_UnlatchIostatusBits(a,b) usc_OutReg((a),MISR,(u16)((b) & 0xaaa0))
-#define usc_UnlatchMiscstatusBits(a,b) usc_OutReg((a),MISR,(u16)((b) & 0x000f))
-
-#define SICR_RXC_ACTIVE BIT15
-#define SICR_RXC_INACTIVE BIT14
-#define SICR_RXC (BIT15+BIT14)
-#define SICR_TXC_ACTIVE BIT13
-#define SICR_TXC_INACTIVE BIT12
-#define SICR_TXC (BIT13+BIT12)
-#define SICR_RI_ACTIVE BIT11
-#define SICR_RI_INACTIVE BIT10
-#define SICR_RI (BIT11+BIT10)
-#define SICR_DSR_ACTIVE BIT9
-#define SICR_DSR_INACTIVE BIT8
-#define SICR_DSR (BIT9+BIT8)
-#define SICR_DCD_ACTIVE BIT7
-#define SICR_DCD_INACTIVE BIT6
-#define SICR_DCD (BIT7+BIT6)
-#define SICR_CTS_ACTIVE BIT5
-#define SICR_CTS_INACTIVE BIT4
-#define SICR_CTS (BIT5+BIT4)
-#define SICR_RCC_UNDERFLOW BIT3
-#define SICR_DPLL_NO_SYNC BIT2
-#define SICR_BRG1_ZERO BIT1
-#define SICR_BRG0_ZERO BIT0
-
-void usc_DisableMasterIrqBit( struct mgsl_struct *info );
-void usc_EnableMasterIrqBit( struct mgsl_struct *info );
-void usc_EnableInterrupts( struct mgsl_struct *info, u16 IrqMask );
-void usc_DisableInterrupts( struct mgsl_struct *info, u16 IrqMask );
-void usc_ClearIrqPendingBits( struct mgsl_struct *info, u16 IrqMask );
-
-#define usc_EnableInterrupts( a, b ) \
- usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0xff00) + 0xc0 + (b)) )
-
-#define usc_DisableInterrupts( a, b ) \
- usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0xff00) + 0x80 + (b)) )
-
-#define usc_EnableMasterIrqBit(a) \
- usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0x0f00) + 0xb000) )
-
-#define usc_DisableMasterIrqBit(a) \
- usc_OutReg( (a), ICR, (u16)(usc_InReg((a),ICR) & 0x7f00) )
-
-#define usc_ClearIrqPendingBits( a, b ) usc_OutReg( (a), DCCR, 0x40 + (b) )
-
-/*
- * Transmit status Bits in Transmit Control status Register (TCSR)
- * and Transmit Interrupt Control Register (TICR) (except BIT2, BIT0)
- */
-
-#define TXSTATUS_PREAMBLE_SENT BIT7
-#define TXSTATUS_IDLE_SENT BIT6
-#define TXSTATUS_ABORT_SENT BIT5
-#define TXSTATUS_EOF BIT4
-#define TXSTATUS_CRC_SENT BIT3
-#define TXSTATUS_ALL_SENT BIT2
-#define TXSTATUS_UNDERRUN BIT1
-#define TXSTATUS_FIFO_EMPTY BIT0
-
-#define DICR_MASTER BIT15
-#define DICR_TRANSMIT BIT0
-#define DICR_RECEIVE BIT1
-
-#define usc_EnableDmaInterrupts(a,b) \
- usc_OutDmaReg( (a), DICR, (u16)(usc_InDmaReg((a),DICR) | (b)) )
-
-#define usc_DisableDmaInterrupts(a,b) \
- usc_OutDmaReg( (a), DICR, (u16)(usc_InDmaReg((a),DICR) & ~(b)) )
-
-#define usc_EnableStatusIrqs(a,b) \
- usc_OutReg( (a), SICR, (u16)(usc_InReg((a),SICR) | (b)) )
-
-#define usc_DisablestatusIrqs(a,b) \
- usc_OutReg( (a), SICR, (u16)(usc_InReg((a),SICR) & ~(b)) )
-
-/* Transmit status Bits in Transmit Control status Register (TCSR) */
-/* and Transmit Interrupt Control Register (TICR) (except BIT2, BIT0) */
-
-
-#define DISABLE_UNCONDITIONAL 0
-#define DISABLE_END_OF_FRAME 1
-#define ENABLE_UNCONDITIONAL 2
-#define ENABLE_AUTO_CTS 3
-#define ENABLE_AUTO_DCD 3
-#define usc_EnableTransmitter(a,b) \
- usc_OutReg( (a), TMR, (u16)((usc_InReg((a),TMR) & 0xfffc) | (b)) )
-#define usc_EnableReceiver(a,b) \
- usc_OutReg( (a), RMR, (u16)((usc_InReg((a),RMR) & 0xfffc) | (b)) )
-
-static u16 usc_InDmaReg( struct mgsl_struct *info, u16 Port );
-static void usc_OutDmaReg( struct mgsl_struct *info, u16 Port, u16 Value );
-static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd );
-
-static u16 usc_InReg( struct mgsl_struct *info, u16 Port );
-static void usc_OutReg( struct mgsl_struct *info, u16 Port, u16 Value );
-static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd );
-void usc_RCmd( struct mgsl_struct *info, u16 Cmd );
-void usc_TCmd( struct mgsl_struct *info, u16 Cmd );
-
-#define usc_TCmd(a,b) usc_OutReg((a), TCSR, (u16)((a)->tcsr_value + (b)))
-#define usc_RCmd(a,b) usc_OutReg((a), RCSR, (b))
-
-#define usc_SetTransmitSyncChars(a,s0,s1) usc_OutReg((a), TSR, (u16)(((u16)s0<<8)|(u16)s1))
-
-static void usc_process_rxoverrun_sync( struct mgsl_struct *info );
-static void usc_start_receiver( struct mgsl_struct *info );
-static void usc_stop_receiver( struct mgsl_struct *info );
-
-static void usc_start_transmitter( struct mgsl_struct *info );
-static void usc_stop_transmitter( struct mgsl_struct *info );
-static void usc_set_txidle( struct mgsl_struct *info );
-static void usc_load_txfifo( struct mgsl_struct *info );
-
-static void usc_enable_aux_clock( struct mgsl_struct *info, u32 DataRate );
-static void usc_enable_loopback( struct mgsl_struct *info, int enable );
-
-static void usc_get_serial_signals( struct mgsl_struct *info );
-static void usc_set_serial_signals( struct mgsl_struct *info );
-
-static void usc_reset( struct mgsl_struct *info );
-
-static void usc_set_sync_mode( struct mgsl_struct *info );
-static void usc_set_sdlc_mode( struct mgsl_struct *info );
-static void usc_set_async_mode( struct mgsl_struct *info );
-static void usc_enable_async_clock( struct mgsl_struct *info, u32 DataRate );
-
-static void usc_loopback_frame( struct mgsl_struct *info );
-
-static void mgsl_tx_timeout(unsigned long context);
-
-
-static void usc_loopmode_cancel_transmit( struct mgsl_struct * info );
-static void usc_loopmode_insert_request( struct mgsl_struct * info );
-static int usc_loopmode_active( struct mgsl_struct * info);
-static void usc_loopmode_send_done( struct mgsl_struct * info );
-
-static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg);
-
-#if SYNCLINK_GENERIC_HDLC
-#define dev_to_port(D) (dev_to_hdlc(D)->priv)
-static void hdlcdev_tx_done(struct mgsl_struct *info);
-static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size);
-static int hdlcdev_init(struct mgsl_struct *info);
-static void hdlcdev_exit(struct mgsl_struct *info);
-#endif
-
-/*
- * Defines a BUS descriptor value for the PCI adapter
- * local bus address ranges.
- */
-
-#define BUS_DESCRIPTOR( WrHold, WrDly, RdDly, Nwdd, Nwad, Nxda, Nrdd, Nrad ) \
-(0x00400020 + \
-((WrHold) << 30) + \
-((WrDly) << 28) + \
-((RdDly) << 26) + \
-((Nwdd) << 20) + \
-((Nwad) << 15) + \
-((Nxda) << 13) + \
-((Nrdd) << 11) + \
-((Nrad) << 6) )
-
-static void mgsl_trace_block(struct mgsl_struct *info,const char* data, int count, int xmit);
-
-/*
- * Adapter diagnostic routines
- */
-static bool mgsl_register_test( struct mgsl_struct *info );
-static bool mgsl_irq_test( struct mgsl_struct *info );
-static bool mgsl_dma_test( struct mgsl_struct *info );
-static bool mgsl_memory_test( struct mgsl_struct *info );
-static int mgsl_adapter_test( struct mgsl_struct *info );
-
-/*
- * device and resource management routines
- */
-static int mgsl_claim_resources(struct mgsl_struct *info);
-static void mgsl_release_resources(struct mgsl_struct *info);
-static void mgsl_add_device(struct mgsl_struct *info);
-static struct mgsl_struct* mgsl_allocate_device(void);
-
-/*
- * DMA buffer manupulation functions.
- */
-static void mgsl_free_rx_frame_buffers( struct mgsl_struct *info, unsigned int StartIndex, unsigned int EndIndex );
-static bool mgsl_get_rx_frame( struct mgsl_struct *info );
-static bool mgsl_get_raw_rx_frame( struct mgsl_struct *info );
-static void mgsl_reset_rx_dma_buffers( struct mgsl_struct *info );
-static void mgsl_reset_tx_dma_buffers( struct mgsl_struct *info );
-static int num_free_tx_dma_buffers(struct mgsl_struct *info);
-static void mgsl_load_tx_dma_buffer( struct mgsl_struct *info, const char *Buffer, unsigned int BufferSize);
-static void mgsl_load_pci_memory(char* TargetPtr, const char* SourcePtr, unsigned short count);
-
-/*
- * DMA and Shared Memory buffer allocation and formatting
- */
-static int mgsl_allocate_dma_buffers(struct mgsl_struct *info);
-static void mgsl_free_dma_buffers(struct mgsl_struct *info);
-static int mgsl_alloc_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList,int Buffercount);
-static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList,int Buffercount);
-static int mgsl_alloc_buffer_list_memory(struct mgsl_struct *info);
-static void mgsl_free_buffer_list_memory(struct mgsl_struct *info);
-static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info);
-static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info);
-static int mgsl_alloc_intermediate_txbuffer_memory(struct mgsl_struct *info);
-static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info);
-static bool load_next_tx_holding_buffer(struct mgsl_struct *info);
-static int save_tx_buffer_request(struct mgsl_struct *info,const char *Buffer, unsigned int BufferSize);
-
-/*
- * Bottom half interrupt handlers
- */
-static void mgsl_bh_handler(struct work_struct *work);
-static void mgsl_bh_receive(struct mgsl_struct *info);
-static void mgsl_bh_transmit(struct mgsl_struct *info);
-static void mgsl_bh_status(struct mgsl_struct *info);
-
-/*
- * Interrupt handler routines and dispatch table.
- */
-static void mgsl_isr_null( struct mgsl_struct *info );
-static void mgsl_isr_transmit_data( struct mgsl_struct *info );
-static void mgsl_isr_receive_data( struct mgsl_struct *info );
-static void mgsl_isr_receive_status( struct mgsl_struct *info );
-static void mgsl_isr_transmit_status( struct mgsl_struct *info );
-static void mgsl_isr_io_pin( struct mgsl_struct *info );
-static void mgsl_isr_misc( struct mgsl_struct *info );
-static void mgsl_isr_receive_dma( struct mgsl_struct *info );
-static void mgsl_isr_transmit_dma( struct mgsl_struct *info );
-
-typedef void (*isr_dispatch_func)(struct mgsl_struct *);
-
-static isr_dispatch_func UscIsrTable[7] =
-{
- mgsl_isr_null,
- mgsl_isr_misc,
- mgsl_isr_io_pin,
- mgsl_isr_transmit_data,
- mgsl_isr_transmit_status,
- mgsl_isr_receive_data,
- mgsl_isr_receive_status
-};
-
-/*
- * ioctl call handlers
- */
-static int tiocmget(struct tty_struct *tty);
-static int tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear);
-static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount
- __user *user_icount);
-static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_params);
-static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_params);
-static int mgsl_get_txidle(struct mgsl_struct * info, int __user *idle_mode);
-static int mgsl_set_txidle(struct mgsl_struct * info, int idle_mode);
-static int mgsl_txenable(struct mgsl_struct * info, int enable);
-static int mgsl_txabort(struct mgsl_struct * info);
-static int mgsl_rxenable(struct mgsl_struct * info, int enable);
-static int mgsl_wait_event(struct mgsl_struct * info, int __user *mask);
-static int mgsl_loopmode_send_done( struct mgsl_struct * info );
-
-/* set non-zero on successful registration with PCI subsystem */
-static bool pci_registered;
-
-/*
- * Global linked list of SyncLink devices
- */
-static struct mgsl_struct *mgsl_device_list;
-static int mgsl_device_count;
-
-/*
- * Set this param to non-zero to load eax with the
- * .text section address and breakpoint on module load.
- * This is useful for use with gdb and add-symbol-file command.
- */
-static int break_on_load;
-
-/*
- * Driver major number, defaults to zero to get auto
- * assigned major number. May be forced as module parameter.
- */
-static int ttymajor;
-
-/*
- * Array of user specified options for ISA adapters.
- */
-static int io[MAX_ISA_DEVICES];
-static int irq[MAX_ISA_DEVICES];
-static int dma[MAX_ISA_DEVICES];
-static int debug_level;
-static int maxframe[MAX_TOTAL_DEVICES];
-static int txdmabufs[MAX_TOTAL_DEVICES];
-static int txholdbufs[MAX_TOTAL_DEVICES];
-
-module_param(break_on_load, bool, 0);
-module_param(ttymajor, int, 0);
-module_param_array(io, int, NULL, 0);
-module_param_array(irq, int, NULL, 0);
-module_param_array(dma, int, NULL, 0);
-module_param(debug_level, int, 0);
-module_param_array(maxframe, int, NULL, 0);
-module_param_array(txdmabufs, int, NULL, 0);
-module_param_array(txholdbufs, int, NULL, 0);
-
-static char *driver_name = "SyncLink serial driver";
-static char *driver_version = "$Revision: 4.38 $";
-
-static int synclink_init_one (struct pci_dev *dev,
- const struct pci_device_id *ent);
-static void synclink_remove_one (struct pci_dev *dev);
-
-static struct pci_device_id synclink_pci_tbl[] = {
- { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_USC, PCI_ANY_ID, PCI_ANY_ID, },
- { PCI_VENDOR_ID_MICROGATE, 0x0210, PCI_ANY_ID, PCI_ANY_ID, },
- { 0, }, /* terminate list */
-};
-MODULE_DEVICE_TABLE(pci, synclink_pci_tbl);
-
-MODULE_LICENSE("GPL");
-
-static struct pci_driver synclink_pci_driver = {
- .name = "synclink",
- .id_table = synclink_pci_tbl,
- .probe = synclink_init_one,
- .remove = __devexit_p(synclink_remove_one),
-};
-
-static struct tty_driver *serial_driver;
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS 256
-
-
-static void mgsl_change_params(struct mgsl_struct *info);
-static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout);
-
-/*
- * 1st function defined in .text section. Calling this function in
- * init_module() followed by a breakpoint allows a remote debugger
- * (gdb) to get the .text address for the add-symbol-file command.
- * This allows remote debugging of dynamically loadable modules.
- */
-static void* mgsl_get_text_ptr(void)
-{
- return mgsl_get_text_ptr;
-}
-
-static inline int mgsl_paranoia_check(struct mgsl_struct *info,
- char *name, const char *routine)
-{
-#ifdef MGSL_PARANOIA_CHECK
- static const char *badmagic =
- "Warning: bad magic number for mgsl struct (%s) in %s\n";
- static const char *badinfo =
- "Warning: null mgsl_struct for (%s) in %s\n";
-
- if (!info) {
- printk(badinfo, name, routine);
- return 1;
- }
- if (info->magic != MGSL_MAGIC) {
- printk(badmagic, name, routine);
- return 1;
- }
-#else
- if (!info)
- return 1;
-#endif
- return 0;
-}
-
-/**
- * line discipline callback wrappers
- *
- * The wrappers maintain line discipline references
- * while calling into the line discipline.
- *
- * ldisc_receive_buf - pass receive data to line discipline
- */
-
-static void ldisc_receive_buf(struct tty_struct *tty,
- const __u8 *data, char *flags, int count)
-{
- struct tty_ldisc *ld;
- if (!tty)
- return;
- ld = tty_ldisc_ref(tty);
- if (ld) {
- if (ld->ops->receive_buf)
- ld->ops->receive_buf(tty, data, flags, count);
- tty_ldisc_deref(ld);
- }
-}
-
-/* mgsl_stop() throttle (stop) transmitter
- *
- * Arguments: tty pointer to tty info structure
- * Return Value: None
- */
-static void mgsl_stop(struct tty_struct *tty)
-{
- struct mgsl_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_stop"))
- return;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk("mgsl_stop(%s)\n",info->device_name);
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if (info->tx_enabled)
- usc_stop_transmitter(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
-} /* end of mgsl_stop() */
-
-/* mgsl_start() release (start) transmitter
- *
- * Arguments: tty pointer to tty info structure
- * Return Value: None
- */
-static void mgsl_start(struct tty_struct *tty)
-{
- struct mgsl_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_start"))
- return;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk("mgsl_start(%s)\n",info->device_name);
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if (!info->tx_enabled)
- usc_start_transmitter(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
-} /* end of mgsl_start() */
-
-/*
- * Bottom half work queue access functions
- */
-
-/* mgsl_bh_action() Return next bottom half action to perform.
- * Return Value: BH action code or 0 if nothing to do.
- */
-static int mgsl_bh_action(struct mgsl_struct *info)
-{
- unsigned long flags;
- int rc = 0;
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
-
- if (info->pending_bh & BH_RECEIVE) {
- info->pending_bh &= ~BH_RECEIVE;
- rc = BH_RECEIVE;
- } else if (info->pending_bh & BH_TRANSMIT) {
- info->pending_bh &= ~BH_TRANSMIT;
- rc = BH_TRANSMIT;
- } else if (info->pending_bh & BH_STATUS) {
- info->pending_bh &= ~BH_STATUS;
- rc = BH_STATUS;
- }
-
- if (!rc) {
- /* Mark BH routine as complete */
- info->bh_running = false;
- info->bh_requested = false;
- }
-
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- return rc;
-}
-
-/*
- * Perform bottom half processing of work items queued by ISR.
- */
-static void mgsl_bh_handler(struct work_struct *work)
-{
- struct mgsl_struct *info =
- container_of(work, struct mgsl_struct, task);
- int action;
-
- if (!info)
- return;
-
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):mgsl_bh_handler(%s) entry\n",
- __FILE__,__LINE__,info->device_name);
-
- info->bh_running = true;
-
- while((action = mgsl_bh_action(info)) != 0) {
-
- /* Process work item */
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):mgsl_bh_handler() work item action=%d\n",
- __FILE__,__LINE__,action);
-
- switch (action) {
-
- case BH_RECEIVE:
- mgsl_bh_receive(info);
- break;
- case BH_TRANSMIT:
- mgsl_bh_transmit(info);
- break;
- case BH_STATUS:
- mgsl_bh_status(info);
- break;
- default:
- /* unknown work item ID */
- printk("Unknown work item ID=%08X!\n", action);
- break;
- }
- }
-
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):mgsl_bh_handler(%s) exit\n",
- __FILE__,__LINE__,info->device_name);
-}
-
-static void mgsl_bh_receive(struct mgsl_struct *info)
-{
- bool (*get_rx_frame)(struct mgsl_struct *info) =
- (info->params.mode == MGSL_MODE_HDLC ? mgsl_get_rx_frame : mgsl_get_raw_rx_frame);
-
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):mgsl_bh_receive(%s)\n",
- __FILE__,__LINE__,info->device_name);
-
- do
- {
- if (info->rx_rcc_underrun) {
- unsigned long flags;
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_start_receiver(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- return;
- }
- } while(get_rx_frame(info));
-}
-
-static void mgsl_bh_transmit(struct mgsl_struct *info)
-{
- struct tty_struct *tty = info->port.tty;
- unsigned long flags;
-
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):mgsl_bh_transmit() entry on %s\n",
- __FILE__,__LINE__,info->device_name);
-
- if (tty)
- tty_wakeup(tty);
-
- /* if transmitter idle and loopmode_send_done_requested
- * then start echoing RxD to TxD
- */
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if ( !info->tx_active && info->loopmode_send_done_requested )
- usc_loopmode_send_done( info );
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-}
-
-static void mgsl_bh_status(struct mgsl_struct *info)
-{
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):mgsl_bh_status() entry on %s\n",
- __FILE__,__LINE__,info->device_name);
-
- info->ri_chkcount = 0;
- info->dsr_chkcount = 0;
- info->dcd_chkcount = 0;
- info->cts_chkcount = 0;
-}
-
-/* mgsl_isr_receive_status()
- *
- * Service a receive status interrupt. The type of status
- * interrupt is indicated by the state of the RCSR.
- * This is only used for HDLC mode.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void mgsl_isr_receive_status( struct mgsl_struct *info )
-{
- u16 status = usc_InReg( info, RCSR );
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):mgsl_isr_receive_status status=%04X\n",
- __FILE__,__LINE__,status);
-
- if ( (status & RXSTATUS_ABORT_RECEIVED) &&
- info->loopmode_insert_requested &&
- usc_loopmode_active(info) )
- {
- ++info->icount.rxabort;
- info->loopmode_insert_requested = false;
-
- /* clear CMR:13 to start echoing RxD to TxD */
- info->cmr_value &= ~BIT13;
- usc_OutReg(info, CMR, info->cmr_value);
-
- /* disable received abort irq (no longer required) */
- usc_OutReg(info, RICR,
- (usc_InReg(info, RICR) & ~RXSTATUS_ABORT_RECEIVED));
- }
-
- if (status & (RXSTATUS_EXITED_HUNT + RXSTATUS_IDLE_RECEIVED)) {
- if (status & RXSTATUS_EXITED_HUNT)
- info->icount.exithunt++;
- if (status & RXSTATUS_IDLE_RECEIVED)
- info->icount.rxidle++;
- wake_up_interruptible(&info->event_wait_q);
- }
-
- if (status & RXSTATUS_OVERRUN){
- info->icount.rxover++;
- usc_process_rxoverrun_sync( info );
- }
-
- usc_ClearIrqPendingBits( info, RECEIVE_STATUS );
- usc_UnlatchRxstatusBits( info, status );
-
-} /* end of mgsl_isr_receive_status() */
-
-/* mgsl_isr_transmit_status()
- *
- * Service a transmit status interrupt
- * HDLC mode :end of transmit frame
- * Async mode:all data is sent
- * transmit status is indicated by bits in the TCSR.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void mgsl_isr_transmit_status( struct mgsl_struct *info )
-{
- u16 status = usc_InReg( info, TCSR );
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):mgsl_isr_transmit_status status=%04X\n",
- __FILE__,__LINE__,status);
-
- usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
- usc_UnlatchTxstatusBits( info, status );
-
- if ( status & (TXSTATUS_UNDERRUN | TXSTATUS_ABORT_SENT) )
- {
- /* finished sending HDLC abort. This may leave */
- /* the TxFifo with data from the aborted frame */
- /* so purge the TxFifo. Also shutdown the DMA */
- /* channel in case there is data remaining in */
- /* the DMA buffer */
- usc_DmaCmd( info, DmaCmd_ResetTxChannel );
- usc_RTCmd( info, RTCmd_PurgeTxFifo );
- }
-
- if ( status & TXSTATUS_EOF_SENT )
- info->icount.txok++;
- else if ( status & TXSTATUS_UNDERRUN )
- info->icount.txunder++;
- else if ( status & TXSTATUS_ABORT_SENT )
- info->icount.txabort++;
- else
- info->icount.txunder++;
-
- info->tx_active = false;
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
- del_timer(&info->tx_timer);
-
- if ( info->drop_rts_on_tx_done ) {
- usc_get_serial_signals( info );
- if ( info->serial_signals & SerialSignal_RTS ) {
- info->serial_signals &= ~SerialSignal_RTS;
- usc_set_serial_signals( info );
- }
- info->drop_rts_on_tx_done = false;
- }
-
-#if SYNCLINK_GENERIC_HDLC
- if (info->netcount)
- hdlcdev_tx_done(info);
- else
-#endif
- {
- if (info->port.tty->stopped || info->port.tty->hw_stopped) {
- usc_stop_transmitter(info);
- return;
- }
- info->pending_bh |= BH_TRANSMIT;
- }
-
-} /* end of mgsl_isr_transmit_status() */
-
-/* mgsl_isr_io_pin()
- *
- * Service an Input/Output pin interrupt. The type of
- * interrupt is indicated by bits in the MISR
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void mgsl_isr_io_pin( struct mgsl_struct *info )
-{
- struct mgsl_icount *icount;
- u16 status = usc_InReg( info, MISR );
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):mgsl_isr_io_pin status=%04X\n",
- __FILE__,__LINE__,status);
-
- usc_ClearIrqPendingBits( info, IO_PIN );
- usc_UnlatchIostatusBits( info, status );
-
- if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED |
- MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) {
- icount = &info->icount;
- /* update input line counters */
- if (status & MISCSTATUS_RI_LATCHED) {
- if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
- usc_DisablestatusIrqs(info,SICR_RI);
- icount->rng++;
- if ( status & MISCSTATUS_RI )
- info->input_signal_events.ri_up++;
- else
- info->input_signal_events.ri_down++;
- }
- if (status & MISCSTATUS_DSR_LATCHED) {
- if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
- usc_DisablestatusIrqs(info,SICR_DSR);
- icount->dsr++;
- if ( status & MISCSTATUS_DSR )
- info->input_signal_events.dsr_up++;
- else
- info->input_signal_events.dsr_down++;
- }
- if (status & MISCSTATUS_DCD_LATCHED) {
- if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
- usc_DisablestatusIrqs(info,SICR_DCD);
- icount->dcd++;
- if (status & MISCSTATUS_DCD) {
- info->input_signal_events.dcd_up++;
- } else
- info->input_signal_events.dcd_down++;
-#if SYNCLINK_GENERIC_HDLC
- if (info->netcount) {
- if (status & MISCSTATUS_DCD)
- netif_carrier_on(info->netdev);
- else
- netif_carrier_off(info->netdev);
- }
-#endif
- }
- if (status & MISCSTATUS_CTS_LATCHED)
- {
- if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
- usc_DisablestatusIrqs(info,SICR_CTS);
- icount->cts++;
- if ( status & MISCSTATUS_CTS )
- info->input_signal_events.cts_up++;
- else
- info->input_signal_events.cts_down++;
- }
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
-
- if ( (info->port.flags & ASYNC_CHECK_CD) &&
- (status & MISCSTATUS_DCD_LATCHED) ) {
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s CD now %s...", info->device_name,
- (status & MISCSTATUS_DCD) ? "on" : "off");
- if (status & MISCSTATUS_DCD)
- wake_up_interruptible(&info->port.open_wait);
- else {
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("doing serial hangup...");
- if (info->port.tty)
- tty_hangup(info->port.tty);
- }
- }
-
- if ( (info->port.flags & ASYNC_CTS_FLOW) &&
- (status & MISCSTATUS_CTS_LATCHED) ) {
- if (info->port.tty->hw_stopped) {
- if (status & MISCSTATUS_CTS) {
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("CTS tx start...");
- if (info->port.tty)
- info->port.tty->hw_stopped = 0;
- usc_start_transmitter(info);
- info->pending_bh |= BH_TRANSMIT;
- return;
- }
- } else {
- if (!(status & MISCSTATUS_CTS)) {
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("CTS tx stop...");
- if (info->port.tty)
- info->port.tty->hw_stopped = 1;
- usc_stop_transmitter(info);
- }
- }
- }
- }
-
- info->pending_bh |= BH_STATUS;
-
- /* for diagnostics set IRQ flag */
- if ( status & MISCSTATUS_TXC_LATCHED ){
- usc_OutReg( info, SICR,
- (unsigned short)(usc_InReg(info,SICR) & ~(SICR_TXC_ACTIVE+SICR_TXC_INACTIVE)) );
- usc_UnlatchIostatusBits( info, MISCSTATUS_TXC_LATCHED );
- info->irq_occurred = true;
- }
-
-} /* end of mgsl_isr_io_pin() */
-
-/* mgsl_isr_transmit_data()
- *
- * Service a transmit data interrupt (async mode only).
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void mgsl_isr_transmit_data( struct mgsl_struct *info )
-{
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):mgsl_isr_transmit_data xmit_cnt=%d\n",
- __FILE__,__LINE__,info->xmit_cnt);
-
- usc_ClearIrqPendingBits( info, TRANSMIT_DATA );
-
- if (info->port.tty->stopped || info->port.tty->hw_stopped) {
- usc_stop_transmitter(info);
- return;
- }
-
- if ( info->xmit_cnt )
- usc_load_txfifo( info );
- else
- info->tx_active = false;
-
- if (info->xmit_cnt < WAKEUP_CHARS)
- info->pending_bh |= BH_TRANSMIT;
-
-} /* end of mgsl_isr_transmit_data() */
-
-/* mgsl_isr_receive_data()
- *
- * Service a receive data interrupt. This occurs
- * when operating in asynchronous interrupt transfer mode.
- * The receive data FIFO is flushed to the receive data buffers.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void mgsl_isr_receive_data( struct mgsl_struct *info )
-{
- int Fifocount;
- u16 status;
- int work = 0;
- unsigned char DataByte;
- struct tty_struct *tty = info->port.tty;
- struct mgsl_icount *icount = &info->icount;
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):mgsl_isr_receive_data\n",
- __FILE__,__LINE__);
-
- usc_ClearIrqPendingBits( info, RECEIVE_DATA );
-
- /* select FIFO status for RICR readback */
- usc_RCmd( info, RCmd_SelectRicrRxFifostatus );
-
- /* clear the Wordstatus bit so that status readback */
- /* only reflects the status of this byte */
- usc_OutReg( info, RICR+LSBONLY, (u16)(usc_InReg(info, RICR+LSBONLY) & ~BIT3 ));
-
- /* flush the receive FIFO */
-
- while( (Fifocount = (usc_InReg(info,RICR) >> 8)) ) {
- int flag;
-
- /* read one byte from RxFIFO */
- outw( (inw(info->io_base + CCAR) & 0x0780) | (RDR+LSBONLY),
- info->io_base + CCAR );
- DataByte = inb( info->io_base + CCAR );
-
- /* get the status of the received byte */
- status = usc_InReg(info, RCSR);
- if ( status & (RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR +
- RXSTATUS_OVERRUN + RXSTATUS_BREAK_RECEIVED) )
- usc_UnlatchRxstatusBits(info,RXSTATUS_ALL);
-
- icount->rx++;
-
- flag = 0;
- if ( status & (RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR +
- RXSTATUS_OVERRUN + RXSTATUS_BREAK_RECEIVED) ) {
- printk("rxerr=%04X\n",status);
- /* update error statistics */
- if ( status & RXSTATUS_BREAK_RECEIVED ) {
- status &= ~(RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR);
- icount->brk++;
- } else if (status & RXSTATUS_PARITY_ERROR)
- icount->parity++;
- else if (status & RXSTATUS_FRAMING_ERROR)
- icount->frame++;
- else if (status & RXSTATUS_OVERRUN) {
- /* must issue purge fifo cmd before */
- /* 16C32 accepts more receive chars */
- usc_RTCmd(info,RTCmd_PurgeRxFifo);
- icount->overrun++;
- }
-
- /* discard char if tty control flags say so */
- if (status & info->ignore_status_mask)
- continue;
-
- status &= info->read_status_mask;
-
- if (status & RXSTATUS_BREAK_RECEIVED) {
- flag = TTY_BREAK;
- if (info->port.flags & ASYNC_SAK)
- do_SAK(tty);
- } else if (status & RXSTATUS_PARITY_ERROR)
- flag = TTY_PARITY;
- else if (status & RXSTATUS_FRAMING_ERROR)
- flag = TTY_FRAME;
- } /* end of if (error) */
- tty_insert_flip_char(tty, DataByte, flag);
- if (status & RXSTATUS_OVERRUN) {
- /* Overrun is special, since it's
- * reported immediately, and doesn't
- * affect the current character
- */
- work += tty_insert_flip_char(tty, 0, TTY_OVERRUN);
- }
- }
-
- if ( debug_level >= DEBUG_LEVEL_ISR ) {
- printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
- __FILE__,__LINE__,icount->rx,icount->brk,
- icount->parity,icount->frame,icount->overrun);
- }
-
- if(work)
- tty_flip_buffer_push(tty);
-}
-
-/* mgsl_isr_misc()
- *
- * Service a miscellaneous interrupt source.
- *
- * Arguments: info pointer to device extension (instance data)
- * Return Value: None
- */
-static void mgsl_isr_misc( struct mgsl_struct *info )
-{
- u16 status = usc_InReg( info, MISR );
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):mgsl_isr_misc status=%04X\n",
- __FILE__,__LINE__,status);
-
- if ((status & MISCSTATUS_RCC_UNDERRUN) &&
- (info->params.mode == MGSL_MODE_HDLC)) {
-
- /* turn off receiver and rx DMA */
- usc_EnableReceiver(info,DISABLE_UNCONDITIONAL);
- usc_DmaCmd(info, DmaCmd_ResetRxChannel);
- usc_UnlatchRxstatusBits(info, RXSTATUS_ALL);
- usc_ClearIrqPendingBits(info, RECEIVE_DATA + RECEIVE_STATUS);
- usc_DisableInterrupts(info, RECEIVE_DATA + RECEIVE_STATUS);
-
- /* schedule BH handler to restart receiver */
- info->pending_bh |= BH_RECEIVE;
- info->rx_rcc_underrun = true;
- }
-
- usc_ClearIrqPendingBits( info, MISC );
- usc_UnlatchMiscstatusBits( info, status );
-
-} /* end of mgsl_isr_misc() */
-
-/* mgsl_isr_null()
- *
- * Services undefined interrupt vectors from the
- * USC. (hence this function SHOULD never be called)
- *
- * Arguments: info pointer to device extension (instance data)
- * Return Value: None
- */
-static void mgsl_isr_null( struct mgsl_struct *info )
-{
-
-} /* end of mgsl_isr_null() */
-
-/* mgsl_isr_receive_dma()
- *
- * Service a receive DMA channel interrupt.
- * For this driver there are two sources of receive DMA interrupts
- * as identified in the Receive DMA mode Register (RDMR):
- *
- * BIT3 EOA/EOL End of List, all receive buffers in receive
- * buffer list have been filled (no more free buffers
- * available). The DMA controller has shut down.
- *
- * BIT2 EOB End of Buffer. This interrupt occurs when a receive
- * DMA buffer is terminated in response to completion
- * of a good frame or a frame with errors. The status
- * of the frame is stored in the buffer entry in the
- * list of receive buffer entries.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void mgsl_isr_receive_dma( struct mgsl_struct *info )
-{
- u16 status;
-
- /* clear interrupt pending and IUS bit for Rx DMA IRQ */
- usc_OutDmaReg( info, CDIR, BIT9+BIT1 );
-
- /* Read the receive DMA status to identify interrupt type. */
- /* This also clears the status bits. */
- status = usc_InDmaReg( info, RDMR );
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):mgsl_isr_receive_dma(%s) status=%04X\n",
- __FILE__,__LINE__,info->device_name,status);
-
- info->pending_bh |= BH_RECEIVE;
-
- if ( status & BIT3 ) {
- info->rx_overflow = true;
- info->icount.buf_overrun++;
- }
-
-} /* end of mgsl_isr_receive_dma() */
-
-/* mgsl_isr_transmit_dma()
- *
- * This function services a transmit DMA channel interrupt.
- *
- * For this driver there is one source of transmit DMA interrupts
- * as identified in the Transmit DMA Mode Register (TDMR):
- *
- * BIT2 EOB End of Buffer. This interrupt occurs when a
- * transmit DMA buffer has been emptied.
- *
- * The driver maintains enough transmit DMA buffers to hold at least
- * one max frame size transmit frame. When operating in a buffered
- * transmit mode, there may be enough transmit DMA buffers to hold at
- * least two or more max frame size frames. On an EOB condition,
- * determine if there are any queued transmit buffers and copy into
- * transmit DMA buffers if we have room.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void mgsl_isr_transmit_dma( struct mgsl_struct *info )
-{
- u16 status;
-
- /* clear interrupt pending and IUS bit for Tx DMA IRQ */
- usc_OutDmaReg(info, CDIR, BIT8+BIT0 );
-
- /* Read the transmit DMA status to identify interrupt type. */
- /* This also clears the status bits. */
-
- status = usc_InDmaReg( info, TDMR );
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):mgsl_isr_transmit_dma(%s) status=%04X\n",
- __FILE__,__LINE__,info->device_name,status);
-
- if ( status & BIT2 ) {
- --info->tx_dma_buffers_used;
-
- /* if there are transmit frames queued,
- * try to load the next one
- */
- if ( load_next_tx_holding_buffer(info) ) {
- /* if call returns non-zero value, we have
- * at least one free tx holding buffer
- */
- info->pending_bh |= BH_TRANSMIT;
- }
- }
-
-} /* end of mgsl_isr_transmit_dma() */
-
-/* mgsl_interrupt()
- *
- * Interrupt service routine entry point.
- *
- * Arguments:
- *
- * irq interrupt number that caused interrupt
- * dev_id device ID supplied during interrupt registration
- *
- * Return Value: None
- */
-static irqreturn_t mgsl_interrupt(int dummy, void *dev_id)
-{
- struct mgsl_struct *info = dev_id;
- u16 UscVector;
- u16 DmaVector;
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk(KERN_DEBUG "%s(%d):mgsl_interrupt(%d)entry.\n",
- __FILE__, __LINE__, info->irq_level);
-
- spin_lock(&info->irq_spinlock);
-
- for(;;) {
- /* Read the interrupt vectors from hardware. */
- UscVector = usc_InReg(info, IVR) >> 9;
- DmaVector = usc_InDmaReg(info, DIVR);
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s UscVector=%08X DmaVector=%08X\n",
- __FILE__,__LINE__,info->device_name,UscVector,DmaVector);
-
- if ( !UscVector && !DmaVector )
- break;
-
- /* Dispatch interrupt vector */
- if ( UscVector )
- (*UscIsrTable[UscVector])(info);
- else if ( (DmaVector&(BIT10|BIT9)) == BIT10)
- mgsl_isr_transmit_dma(info);
- else
- mgsl_isr_receive_dma(info);
-
- if ( info->isr_overflow ) {
- printk(KERN_ERR "%s(%d):%s isr overflow irq=%d\n",
- __FILE__, __LINE__, info->device_name, info->irq_level);
- usc_DisableMasterIrqBit(info);
- usc_DisableDmaInterrupts(info,DICR_MASTER);
- break;
- }
- }
-
- /* Request bottom half processing if there's something
- * for it to do and the bh is not already running
- */
-
- if ( info->pending_bh && !info->bh_running && !info->bh_requested ) {
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s queueing bh task.\n",
- __FILE__,__LINE__,info->device_name);
- schedule_work(&info->task);
- info->bh_requested = true;
- }
-
- spin_unlock(&info->irq_spinlock);
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk(KERN_DEBUG "%s(%d):mgsl_interrupt(%d)exit.\n",
- __FILE__, __LINE__, info->irq_level);
-
- return IRQ_HANDLED;
-} /* end of mgsl_interrupt() */
-
-/* startup()
- *
- * Initialize and start device.
- *
- * Arguments: info pointer to device instance data
- * Return Value: 0 if success, otherwise error code
- */
-static int startup(struct mgsl_struct * info)
-{
- int retval = 0;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk("%s(%d):mgsl_startup(%s)\n",__FILE__,__LINE__,info->device_name);
-
- if (info->port.flags & ASYNC_INITIALIZED)
- return 0;
-
- if (!info->xmit_buf) {
- /* allocate a page of memory for a transmit buffer */
- info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
- if (!info->xmit_buf) {
- printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
- __FILE__,__LINE__,info->device_name);
- return -ENOMEM;
- }
- }
-
- info->pending_bh = 0;
-
- memset(&info->icount, 0, sizeof(info->icount));
-
- setup_timer(&info->tx_timer, mgsl_tx_timeout, (unsigned long)info);
-
- /* Allocate and claim adapter resources */
- retval = mgsl_claim_resources(info);
-
- /* perform existence check and diagnostics */
- if ( !retval )
- retval = mgsl_adapter_test(info);
-
- if ( retval ) {
- if (capable(CAP_SYS_ADMIN) && info->port.tty)
- set_bit(TTY_IO_ERROR, &info->port.tty->flags);
- mgsl_release_resources(info);
- return retval;
- }
-
- /* program hardware for current parameters */
- mgsl_change_params(info);
-
- if (info->port.tty)
- clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
- info->port.flags |= ASYNC_INITIALIZED;
-
- return 0;
-
-} /* end of startup() */
-
-/* shutdown()
- *
- * Called by mgsl_close() and mgsl_hangup() to shutdown hardware
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void shutdown(struct mgsl_struct * info)
-{
- unsigned long flags;
-
- if (!(info->port.flags & ASYNC_INITIALIZED))
- return;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_shutdown(%s)\n",
- __FILE__,__LINE__, info->device_name );
-
- /* clear status wait queue because status changes */
- /* can't happen after shutting down the hardware */
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
-
- del_timer_sync(&info->tx_timer);
-
- if (info->xmit_buf) {
- free_page((unsigned long) info->xmit_buf);
- info->xmit_buf = NULL;
- }
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_DisableMasterIrqBit(info);
- usc_stop_receiver(info);
- usc_stop_transmitter(info);
- usc_DisableInterrupts(info,RECEIVE_DATA + RECEIVE_STATUS +
- TRANSMIT_DATA + TRANSMIT_STATUS + IO_PIN + MISC );
- usc_DisableDmaInterrupts(info,DICR_MASTER + DICR_TRANSMIT + DICR_RECEIVE);
-
- /* Disable DMAEN (Port 7, Bit 14) */
- /* This disconnects the DMA request signal from the ISA bus */
- /* on the ISA adapter. This has no effect for the PCI adapter */
- usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) | BIT14));
-
- /* Disable INTEN (Port 6, Bit12) */
- /* This disconnects the IRQ request signal to the ISA bus */
- /* on the ISA adapter. This has no effect for the PCI adapter */
- usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) | BIT12));
-
- if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) {
- info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
- usc_set_serial_signals(info);
- }
-
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- mgsl_release_resources(info);
-
- if (info->port.tty)
- set_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
- info->port.flags &= ~ASYNC_INITIALIZED;
-
-} /* end of shutdown() */
-
-static void mgsl_program_hw(struct mgsl_struct *info)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
-
- usc_stop_receiver(info);
- usc_stop_transmitter(info);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-
- if (info->params.mode == MGSL_MODE_HDLC ||
- info->params.mode == MGSL_MODE_RAW ||
- info->netcount)
- usc_set_sync_mode(info);
- else
- usc_set_async_mode(info);
-
- usc_set_serial_signals(info);
-
- info->dcd_chkcount = 0;
- info->cts_chkcount = 0;
- info->ri_chkcount = 0;
- info->dsr_chkcount = 0;
-
- usc_EnableStatusIrqs(info,SICR_CTS+SICR_DSR+SICR_DCD+SICR_RI);
- usc_EnableInterrupts(info, IO_PIN);
- usc_get_serial_signals(info);
-
- if (info->netcount || info->port.tty->termios->c_cflag & CREAD)
- usc_start_receiver(info);
-
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-}
-
-/* Reconfigure adapter based on new parameters
- */
-static void mgsl_change_params(struct mgsl_struct *info)
-{
- unsigned cflag;
- int bits_per_char;
-
- if (!info->port.tty || !info->port.tty->termios)
- return;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_change_params(%s)\n",
- __FILE__,__LINE__, info->device_name );
-
- cflag = info->port.tty->termios->c_cflag;
-
- /* if B0 rate (hangup) specified then negate DTR and RTS */
- /* otherwise assert DTR and RTS */
- if (cflag & CBAUD)
- info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
- else
- info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
-
- /* byte size and parity */
-
- switch (cflag & CSIZE) {
- case CS5: info->params.data_bits = 5; break;
- case CS6: info->params.data_bits = 6; break;
- case CS7: info->params.data_bits = 7; break;
- case CS8: info->params.data_bits = 8; break;
- /* Never happens, but GCC is too dumb to figure it out */
- default: info->params.data_bits = 7; break;
- }
-
- if (cflag & CSTOPB)
- info->params.stop_bits = 2;
- else
- info->params.stop_bits = 1;
-
- info->params.parity = ASYNC_PARITY_NONE;
- if (cflag & PARENB) {
- if (cflag & PARODD)
- info->params.parity = ASYNC_PARITY_ODD;
- else
- info->params.parity = ASYNC_PARITY_EVEN;
-#ifdef CMSPAR
- if (cflag & CMSPAR)
- info->params.parity = ASYNC_PARITY_SPACE;
-#endif
- }
-
- /* calculate number of jiffies to transmit a full
- * FIFO (32 bytes) at specified data rate
- */
- bits_per_char = info->params.data_bits +
- info->params.stop_bits + 1;
-
- /* if port data rate is set to 460800 or less then
- * allow tty settings to override, otherwise keep the
- * current data rate.
- */
- if (info->params.data_rate <= 460800)
- info->params.data_rate = tty_get_baud_rate(info->port.tty);
-
- if ( info->params.data_rate ) {
- info->timeout = (32*HZ*bits_per_char) /
- info->params.data_rate;
- }
- info->timeout += HZ/50; /* Add .02 seconds of slop */
-
- if (cflag & CRTSCTS)
- info->port.flags |= ASYNC_CTS_FLOW;
- else
- info->port.flags &= ~ASYNC_CTS_FLOW;
-
- if (cflag & CLOCAL)
- info->port.flags &= ~ASYNC_CHECK_CD;
- else
- info->port.flags |= ASYNC_CHECK_CD;
-
- /* process tty input control flags */
-
- info->read_status_mask = RXSTATUS_OVERRUN;
- if (I_INPCK(info->port.tty))
- info->read_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR;
- if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
- info->read_status_mask |= RXSTATUS_BREAK_RECEIVED;
-
- if (I_IGNPAR(info->port.tty))
- info->ignore_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR;
- if (I_IGNBRK(info->port.tty)) {
- info->ignore_status_mask |= RXSTATUS_BREAK_RECEIVED;
- /* If ignoring parity and break indicators, ignore
- * overruns too. (For real raw support).
- */
- if (I_IGNPAR(info->port.tty))
- info->ignore_status_mask |= RXSTATUS_OVERRUN;
- }
-
- mgsl_program_hw(info);
-
-} /* end of mgsl_change_params() */
-
-/* mgsl_put_char()
- *
- * Add a character to the transmit buffer.
- *
- * Arguments: tty pointer to tty information structure
- * ch character to add to transmit buffer
- *
- * Return Value: None
- */
-static int mgsl_put_char(struct tty_struct *tty, unsigned char ch)
-{
- struct mgsl_struct *info = tty->driver_data;
- unsigned long flags;
- int ret = 0;
-
- if (debug_level >= DEBUG_LEVEL_INFO) {
- printk(KERN_DEBUG "%s(%d):mgsl_put_char(%d) on %s\n",
- __FILE__, __LINE__, ch, info->device_name);
- }
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_put_char"))
- return 0;
-
- if (!info->xmit_buf)
- return 0;
-
- spin_lock_irqsave(&info->irq_spinlock, flags);
-
- if ((info->params.mode == MGSL_MODE_ASYNC ) || !info->tx_active) {
- if (info->xmit_cnt < SERIAL_XMIT_SIZE - 1) {
- info->xmit_buf[info->xmit_head++] = ch;
- info->xmit_head &= SERIAL_XMIT_SIZE-1;
- info->xmit_cnt++;
- ret = 1;
- }
- }
- spin_unlock_irqrestore(&info->irq_spinlock, flags);
- return ret;
-
-} /* end of mgsl_put_char() */
-
-/* mgsl_flush_chars()
- *
- * Enable transmitter so remaining characters in the
- * transmit buffer are sent.
- *
- * Arguments: tty pointer to tty information structure
- * Return Value: None
- */
-static void mgsl_flush_chars(struct tty_struct *tty)
-{
- struct mgsl_struct *info = tty->driver_data;
- unsigned long flags;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_flush_chars() entry on %s xmit_cnt=%d\n",
- __FILE__,__LINE__,info->device_name,info->xmit_cnt);
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_flush_chars"))
- return;
-
- if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
- !info->xmit_buf)
- return;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_flush_chars() entry on %s starting transmitter\n",
- __FILE__,__LINE__,info->device_name );
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
-
- if (!info->tx_active) {
- if ( (info->params.mode == MGSL_MODE_HDLC ||
- info->params.mode == MGSL_MODE_RAW) && info->xmit_cnt ) {
- /* operating in synchronous (frame oriented) mode */
- /* copy data from circular xmit_buf to */
- /* transmit DMA buffer. */
- mgsl_load_tx_dma_buffer(info,
- info->xmit_buf,info->xmit_cnt);
- }
- usc_start_transmitter(info);
- }
-
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
-} /* end of mgsl_flush_chars() */
-
-/* mgsl_write()
- *
- * Send a block of data
- *
- * Arguments:
- *
- * tty pointer to tty information structure
- * buf pointer to buffer containing send data
- * count size of send data in bytes
- *
- * Return Value: number of characters written
- */
-static int mgsl_write(struct tty_struct * tty,
- const unsigned char *buf, int count)
-{
- int c, ret = 0;
- struct mgsl_struct *info = tty->driver_data;
- unsigned long flags;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_write(%s) count=%d\n",
- __FILE__,__LINE__,info->device_name,count);
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_write"))
- goto cleanup;
-
- if (!info->xmit_buf)
- goto cleanup;
-
- if ( info->params.mode == MGSL_MODE_HDLC ||
- info->params.mode == MGSL_MODE_RAW ) {
- /* operating in synchronous (frame oriented) mode */
- /* operating in synchronous (frame oriented) mode */
- if (info->tx_active) {
-
- if ( info->params.mode == MGSL_MODE_HDLC ) {
- ret = 0;
- goto cleanup;
- }
- /* transmitter is actively sending data -
- * if we have multiple transmit dma and
- * holding buffers, attempt to queue this
- * frame for transmission at a later time.
- */
- if (info->tx_holding_count >= info->num_tx_holding_buffers ) {
- /* no tx holding buffers available */
- ret = 0;
- goto cleanup;
- }
-
- /* queue transmit frame request */
- ret = count;
- save_tx_buffer_request(info,buf,count);
-
- /* if we have sufficient tx dma buffers,
- * load the next buffered tx request
- */
- spin_lock_irqsave(&info->irq_spinlock,flags);
- load_next_tx_holding_buffer(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- goto cleanup;
- }
-
- /* if operating in HDLC LoopMode and the adapter */
- /* has yet to be inserted into the loop, we can't */
- /* transmit */
-
- if ( (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) &&
- !usc_loopmode_active(info) )
- {
- ret = 0;
- goto cleanup;
- }
-
- if ( info->xmit_cnt ) {
- /* Send accumulated from send_char() calls */
- /* as frame and wait before accepting more data. */
- ret = 0;
-
- /* copy data from circular xmit_buf to */
- /* transmit DMA buffer. */
- mgsl_load_tx_dma_buffer(info,
- info->xmit_buf,info->xmit_cnt);
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_write(%s) sync xmit_cnt flushing\n",
- __FILE__,__LINE__,info->device_name);
- } else {
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_write(%s) sync transmit accepted\n",
- __FILE__,__LINE__,info->device_name);
- ret = count;
- info->xmit_cnt = count;
- mgsl_load_tx_dma_buffer(info,buf,count);
- }
- } else {
- while (1) {
- spin_lock_irqsave(&info->irq_spinlock,flags);
- c = min_t(int, count,
- min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
- SERIAL_XMIT_SIZE - info->xmit_head));
- if (c <= 0) {
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- break;
- }
- memcpy(info->xmit_buf + info->xmit_head, buf, c);
- info->xmit_head = ((info->xmit_head + c) &
- (SERIAL_XMIT_SIZE-1));
- info->xmit_cnt += c;
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- buf += c;
- count -= c;
- ret += c;
- }
- }
-
- if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if (!info->tx_active)
- usc_start_transmitter(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- }
-cleanup:
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_write(%s) returning=%d\n",
- __FILE__,__LINE__,info->device_name,ret);
-
- return ret;
-
-} /* end of mgsl_write() */
-
-/* mgsl_write_room()
- *
- * Return the count of free bytes in transmit buffer
- *
- * Arguments: tty pointer to tty info structure
- * Return Value: None
- */
-static int mgsl_write_room(struct tty_struct *tty)
-{
- struct mgsl_struct *info = tty->driver_data;
- int ret;
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_write_room"))
- return 0;
- ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
- if (ret < 0)
- ret = 0;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_write_room(%s)=%d\n",
- __FILE__,__LINE__, info->device_name,ret );
-
- if ( info->params.mode == MGSL_MODE_HDLC ||
- info->params.mode == MGSL_MODE_RAW ) {
- /* operating in synchronous (frame oriented) mode */
- if ( info->tx_active )
- return 0;
- else
- return HDLC_MAX_FRAME_SIZE;
- }
-
- return ret;
-
-} /* end of mgsl_write_room() */
-
-/* mgsl_chars_in_buffer()
- *
- * Return the count of bytes in transmit buffer
- *
- * Arguments: tty pointer to tty info structure
- * Return Value: None
- */
-static int mgsl_chars_in_buffer(struct tty_struct *tty)
-{
- struct mgsl_struct *info = tty->driver_data;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_chars_in_buffer(%s)\n",
- __FILE__,__LINE__, info->device_name );
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_chars_in_buffer"))
- return 0;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_chars_in_buffer(%s)=%d\n",
- __FILE__,__LINE__, info->device_name,info->xmit_cnt );
-
- if ( info->params.mode == MGSL_MODE_HDLC ||
- info->params.mode == MGSL_MODE_RAW ) {
- /* operating in synchronous (frame oriented) mode */
- if ( info->tx_active )
- return info->max_frame_size;
- else
- return 0;
- }
-
- return info->xmit_cnt;
-} /* end of mgsl_chars_in_buffer() */
-
-/* mgsl_flush_buffer()
- *
- * Discard all data in the send buffer
- *
- * Arguments: tty pointer to tty info structure
- * Return Value: None
- */
-static void mgsl_flush_buffer(struct tty_struct *tty)
-{
- struct mgsl_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_flush_buffer(%s) entry\n",
- __FILE__,__LINE__, info->device_name );
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_flush_buffer"))
- return;
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
- del_timer(&info->tx_timer);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- tty_wakeup(tty);
-}
-
-/* mgsl_send_xchar()
- *
- * Send a high-priority XON/XOFF character
- *
- * Arguments: tty pointer to tty info structure
- * ch character to send
- * Return Value: None
- */
-static void mgsl_send_xchar(struct tty_struct *tty, char ch)
-{
- struct mgsl_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_send_xchar(%s,%d)\n",
- __FILE__,__LINE__, info->device_name, ch );
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_send_xchar"))
- return;
-
- info->x_char = ch;
- if (ch) {
- /* Make sure transmit interrupts are on */
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if (!info->tx_enabled)
- usc_start_transmitter(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- }
-} /* end of mgsl_send_xchar() */
-
-/* mgsl_throttle()
- *
- * Signal remote device to throttle send data (our receive data)
- *
- * Arguments: tty pointer to tty info structure
- * Return Value: None
- */
-static void mgsl_throttle(struct tty_struct * tty)
-{
- struct mgsl_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_throttle(%s) entry\n",
- __FILE__,__LINE__, info->device_name );
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_throttle"))
- return;
-
- if (I_IXOFF(tty))
- mgsl_send_xchar(tty, STOP_CHAR(tty));
-
- if (tty->termios->c_cflag & CRTSCTS) {
- spin_lock_irqsave(&info->irq_spinlock,flags);
- info->serial_signals &= ~SerialSignal_RTS;
- usc_set_serial_signals(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- }
-} /* end of mgsl_throttle() */
-
-/* mgsl_unthrottle()
- *
- * Signal remote device to stop throttling send data (our receive data)
- *
- * Arguments: tty pointer to tty info structure
- * Return Value: None
- */
-static void mgsl_unthrottle(struct tty_struct * tty)
-{
- struct mgsl_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_unthrottle(%s) entry\n",
- __FILE__,__LINE__, info->device_name );
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_unthrottle"))
- return;
-
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else
- mgsl_send_xchar(tty, START_CHAR(tty));
- }
-
- if (tty->termios->c_cflag & CRTSCTS) {
- spin_lock_irqsave(&info->irq_spinlock,flags);
- info->serial_signals |= SerialSignal_RTS;
- usc_set_serial_signals(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- }
-
-} /* end of mgsl_unthrottle() */
-
-/* mgsl_get_stats()
- *
- * get the current serial parameters information
- *
- * Arguments: info pointer to device instance data
- * user_icount pointer to buffer to hold returned stats
- *
- * Return Value: 0 if success, otherwise error code
- */
-static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount __user *user_icount)
-{
- int err;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_get_params(%s)\n",
- __FILE__,__LINE__, info->device_name);
-
- if (!user_icount) {
- memset(&info->icount, 0, sizeof(info->icount));
- } else {
- mutex_lock(&info->port.mutex);
- COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
- mutex_unlock(&info->port.mutex);
- if (err)
- return -EFAULT;
- }
-
- return 0;
-
-} /* end of mgsl_get_stats() */
-
-/* mgsl_get_params()
- *
- * get the current serial parameters information
- *
- * Arguments: info pointer to device instance data
- * user_params pointer to buffer to hold returned params
- *
- * Return Value: 0 if success, otherwise error code
- */
-static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_params)
-{
- int err;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_get_params(%s)\n",
- __FILE__,__LINE__, info->device_name);
-
- mutex_lock(&info->port.mutex);
- COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
- mutex_unlock(&info->port.mutex);
- if (err) {
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_get_params(%s) user buffer copy failed\n",
- __FILE__,__LINE__,info->device_name);
- return -EFAULT;
- }
-
- return 0;
-
-} /* end of mgsl_get_params() */
-
-/* mgsl_set_params()
- *
- * set the serial parameters
- *
- * Arguments:
- *
- * info pointer to device instance data
- * new_params user buffer containing new serial params
- *
- * Return Value: 0 if success, otherwise error code
- */
-static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_params)
-{
- unsigned long flags;
- MGSL_PARAMS tmp_params;
- int err;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_set_params %s\n", __FILE__,__LINE__,
- info->device_name );
- COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
- if (err) {
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_set_params(%s) user buffer copy failed\n",
- __FILE__,__LINE__,info->device_name);
- return -EFAULT;
- }
-
- mutex_lock(&info->port.mutex);
- spin_lock_irqsave(&info->irq_spinlock,flags);
- memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- mgsl_change_params(info);
- mutex_unlock(&info->port.mutex);
-
- return 0;
-
-} /* end of mgsl_set_params() */
-
-/* mgsl_get_txidle()
- *
- * get the current transmit idle mode
- *
- * Arguments: info pointer to device instance data
- * idle_mode pointer to buffer to hold returned idle mode
- *
- * Return Value: 0 if success, otherwise error code
- */
-static int mgsl_get_txidle(struct mgsl_struct * info, int __user *idle_mode)
-{
- int err;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_get_txidle(%s)=%d\n",
- __FILE__,__LINE__, info->device_name, info->idle_mode);
-
- COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
- if (err) {
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_get_txidle(%s) user buffer copy failed\n",
- __FILE__,__LINE__,info->device_name);
- return -EFAULT;
- }
-
- return 0;
-
-} /* end of mgsl_get_txidle() */
-
-/* mgsl_set_txidle() service ioctl to set transmit idle mode
- *
- * Arguments: info pointer to device instance data
- * idle_mode new idle mode
- *
- * Return Value: 0 if success, otherwise error code
- */
-static int mgsl_set_txidle(struct mgsl_struct * info, int idle_mode)
-{
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_set_txidle(%s,%d)\n", __FILE__,__LINE__,
- info->device_name, idle_mode );
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- info->idle_mode = idle_mode;
- usc_set_txidle( info );
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- return 0;
-
-} /* end of mgsl_set_txidle() */
-
-/* mgsl_txenable()
- *
- * enable or disable the transmitter
- *
- * Arguments:
- *
- * info pointer to device instance data
- * enable 1 = enable, 0 = disable
- *
- * Return Value: 0 if success, otherwise error code
- */
-static int mgsl_txenable(struct mgsl_struct * info, int enable)
-{
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_txenable(%s,%d)\n", __FILE__,__LINE__,
- info->device_name, enable);
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if ( enable ) {
- if ( !info->tx_enabled ) {
-
- usc_start_transmitter(info);
- /*--------------------------------------------------
- * if HDLC/SDLC Loop mode, attempt to insert the
- * station in the 'loop' by setting CMR:13. Upon
- * receipt of the next GoAhead (RxAbort) sequence,
- * the OnLoop indicator (CCSR:7) should go active
- * to indicate that we are on the loop
- *--------------------------------------------------*/
- if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
- usc_loopmode_insert_request( info );
- }
- } else {
- if ( info->tx_enabled )
- usc_stop_transmitter(info);
- }
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- return 0;
-
-} /* end of mgsl_txenable() */
-
-/* mgsl_txabort() abort send HDLC frame
- *
- * Arguments: info pointer to device instance data
- * Return Value: 0 if success, otherwise error code
- */
-static int mgsl_txabort(struct mgsl_struct * info)
-{
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_txabort(%s)\n", __FILE__,__LINE__,
- info->device_name);
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC )
- {
- if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
- usc_loopmode_cancel_transmit( info );
- else
- usc_TCmd(info,TCmd_SendAbort);
- }
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- return 0;
-
-} /* end of mgsl_txabort() */
-
-/* mgsl_rxenable() enable or disable the receiver
- *
- * Arguments: info pointer to device instance data
- * enable 1 = enable, 0 = disable
- * Return Value: 0 if success, otherwise error code
- */
-static int mgsl_rxenable(struct mgsl_struct * info, int enable)
-{
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_rxenable(%s,%d)\n", __FILE__,__LINE__,
- info->device_name, enable);
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if ( enable ) {
- if ( !info->rx_enabled )
- usc_start_receiver(info);
- } else {
- if ( info->rx_enabled )
- usc_stop_receiver(info);
- }
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- return 0;
-
-} /* end of mgsl_rxenable() */
-
-/* mgsl_wait_event() wait for specified event to occur
- *
- * Arguments: info pointer to device instance data
- * mask pointer to bitmask of events to wait for
- * Return Value: 0 if successful and bit mask updated with
- * of events triggerred,
- * otherwise error code
- */
-static int mgsl_wait_event(struct mgsl_struct * info, int __user * mask_ptr)
-{
- unsigned long flags;
- int s;
- int rc=0;
- struct mgsl_icount cprev, cnow;
- int events;
- int mask;
- struct _input_signal_events oldsigs, newsigs;
- DECLARE_WAITQUEUE(wait, current);
-
- COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
- if (rc) {
- return -EFAULT;
- }
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_wait_event(%s,%d)\n", __FILE__,__LINE__,
- info->device_name, mask);
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
-
- /* return immediately if state matches requested events */
- usc_get_serial_signals(info);
- s = info->serial_signals;
- events = mask &
- ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
- ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
- ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
- ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
- if (events) {
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- goto exit;
- }
-
- /* save current irq counts */
- cprev = info->icount;
- oldsigs = info->input_signal_events;
-
- /* enable hunt and idle irqs if needed */
- if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
- u16 oldreg = usc_InReg(info,RICR);
- u16 newreg = oldreg +
- (mask & MgslEvent_ExitHuntMode ? RXSTATUS_EXITED_HUNT:0) +
- (mask & MgslEvent_IdleReceived ? RXSTATUS_IDLE_RECEIVED:0);
- if (oldreg != newreg)
- usc_OutReg(info, RICR, newreg);
- }
-
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&info->event_wait_q, &wait);
-
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
-
- for(;;) {
- schedule();
- if (signal_pending(current)) {
- rc = -ERESTARTSYS;
- break;
- }
-
- /* get current irq counts */
- spin_lock_irqsave(&info->irq_spinlock,flags);
- cnow = info->icount;
- newsigs = info->input_signal_events;
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- /* if no change, wait aborted for some reason */
- if (newsigs.dsr_up == oldsigs.dsr_up &&
- newsigs.dsr_down == oldsigs.dsr_down &&
- newsigs.dcd_up == oldsigs.dcd_up &&
- newsigs.dcd_down == oldsigs.dcd_down &&
- newsigs.cts_up == oldsigs.cts_up &&
- newsigs.cts_down == oldsigs.cts_down &&
- newsigs.ri_up == oldsigs.ri_up &&
- newsigs.ri_down == oldsigs.ri_down &&
- cnow.exithunt == cprev.exithunt &&
- cnow.rxidle == cprev.rxidle) {
- rc = -EIO;
- break;
- }
-
- events = mask &
- ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
- (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
- (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
- (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
- (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
- (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
- (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
- (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
- (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
- (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
- if (events)
- break;
-
- cprev = cnow;
- oldsigs = newsigs;
- }
-
- remove_wait_queue(&info->event_wait_q, &wait);
- set_current_state(TASK_RUNNING);
-
- if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if (!waitqueue_active(&info->event_wait_q)) {
- /* disable enable exit hunt mode/idle rcvd IRQs */
- usc_OutReg(info, RICR, usc_InReg(info,RICR) &
- ~(RXSTATUS_EXITED_HUNT + RXSTATUS_IDLE_RECEIVED));
- }
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- }
-exit:
- if ( rc == 0 )
- PUT_USER(rc, events, mask_ptr);
-
- return rc;
-
-} /* end of mgsl_wait_event() */
-
-static int modem_input_wait(struct mgsl_struct *info,int arg)
-{
- unsigned long flags;
- int rc;
- struct mgsl_icount cprev, cnow;
- DECLARE_WAITQUEUE(wait, current);
-
- /* save current irq counts */
- spin_lock_irqsave(&info->irq_spinlock,flags);
- cprev = info->icount;
- add_wait_queue(&info->status_event_wait_q, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- for(;;) {
- schedule();
- if (signal_pending(current)) {
- rc = -ERESTARTSYS;
- break;
- }
-
- /* get new irq counts */
- spin_lock_irqsave(&info->irq_spinlock,flags);
- cnow = info->icount;
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- /* if no change, wait aborted for some reason */
- if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
- cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
- rc = -EIO;
- break;
- }
-
- /* check for change in caller specified modem input */
- if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
- (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
- (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
- (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
- rc = 0;
- break;
- }
-
- cprev = cnow;
- }
- remove_wait_queue(&info->status_event_wait_q, &wait);
- set_current_state(TASK_RUNNING);
- return rc;
-}
-
-/* return the state of the serial control and status signals
- */
-static int tiocmget(struct tty_struct *tty)
-{
- struct mgsl_struct *info = tty->driver_data;
- unsigned int result;
- unsigned long flags;
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_get_serial_signals(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
- ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
- ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
- ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
- ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
- ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s tiocmget() value=%08X\n",
- __FILE__,__LINE__, info->device_name, result );
- return result;
-}
-
-/* set modem control signals (DTR/RTS)
- */
-static int tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- struct mgsl_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s tiocmset(%x,%x)\n",
- __FILE__,__LINE__,info->device_name, set, clear);
-
- if (set & TIOCM_RTS)
- info->serial_signals |= SerialSignal_RTS;
- if (set & TIOCM_DTR)
- info->serial_signals |= SerialSignal_DTR;
- if (clear & TIOCM_RTS)
- info->serial_signals &= ~SerialSignal_RTS;
- if (clear & TIOCM_DTR)
- info->serial_signals &= ~SerialSignal_DTR;
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_set_serial_signals(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- return 0;
-}
-
-/* mgsl_break() Set or clear transmit break condition
- *
- * Arguments: tty pointer to tty instance data
- * break_state -1=set break condition, 0=clear
- * Return Value: error code
- */
-static int mgsl_break(struct tty_struct *tty, int break_state)
-{
- struct mgsl_struct * info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_break(%s,%d)\n",
- __FILE__,__LINE__, info->device_name, break_state);
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_break"))
- return -EINVAL;
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if (break_state == -1)
- usc_OutReg(info,IOCR,(u16)(usc_InReg(info,IOCR) | BIT7));
- else
- usc_OutReg(info,IOCR,(u16)(usc_InReg(info,IOCR) & ~BIT7));
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- return 0;
-
-} /* end of mgsl_break() */
-
-/*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
-static int msgl_get_icount(struct tty_struct *tty,
- struct serial_icounter_struct *icount)
-
-{
- struct mgsl_struct * info = tty->driver_data;
- struct mgsl_icount cnow; /* kernel counter temps */
- unsigned long flags;
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- icount->cts = cnow.cts;
- icount->dsr = cnow.dsr;
- icount->rng = cnow.rng;
- icount->dcd = cnow.dcd;
- icount->rx = cnow.rx;
- icount->tx = cnow.tx;
- icount->frame = cnow.frame;
- icount->overrun = cnow.overrun;
- icount->parity = cnow.parity;
- icount->brk = cnow.brk;
- icount->buf_overrun = cnow.buf_overrun;
- return 0;
-}
-
-/* mgsl_ioctl() Service an IOCTL request
- *
- * Arguments:
- *
- * tty pointer to tty instance data
- * cmd IOCTL command code
- * arg command argument/context
- *
- * Return Value: 0 if success, otherwise error code
- */
-static int mgsl_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct mgsl_struct * info = tty->driver_data;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_ioctl %s cmd=%08X\n", __FILE__,__LINE__,
- info->device_name, cmd );
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_ioctl"))
- return -ENODEV;
-
- if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != TIOCMIWAIT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
- }
-
- return mgsl_ioctl_common(info, cmd, arg);
-}
-
-static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
-
- switch (cmd) {
- case MGSL_IOCGPARAMS:
- return mgsl_get_params(info, argp);
- case MGSL_IOCSPARAMS:
- return mgsl_set_params(info, argp);
- case MGSL_IOCGTXIDLE:
- return mgsl_get_txidle(info, argp);
- case MGSL_IOCSTXIDLE:
- return mgsl_set_txidle(info,(int)arg);
- case MGSL_IOCTXENABLE:
- return mgsl_txenable(info,(int)arg);
- case MGSL_IOCRXENABLE:
- return mgsl_rxenable(info,(int)arg);
- case MGSL_IOCTXABORT:
- return mgsl_txabort(info);
- case MGSL_IOCGSTATS:
- return mgsl_get_stats(info, argp);
- case MGSL_IOCWAITEVENT:
- return mgsl_wait_event(info, argp);
- case MGSL_IOCLOOPTXDONE:
- return mgsl_loopmode_send_done(info);
- /* Wait for modem input (DCD,RI,DSR,CTS) change
- * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS)
- */
- case TIOCMIWAIT:
- return modem_input_wait(info,(int)arg);
-
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
-/* mgsl_set_termios()
- *
- * Set new termios settings
- *
- * Arguments:
- *
- * tty pointer to tty structure
- * termios pointer to buffer to hold returned old termios
- *
- * Return Value: None
- */
-static void mgsl_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
-{
- struct mgsl_struct *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_set_termios %s\n", __FILE__,__LINE__,
- tty->driver->name );
-
- mgsl_change_params(info);
-
- /* Handle transition to B0 status */
- if (old_termios->c_cflag & CBAUD &&
- !(tty->termios->c_cflag & CBAUD)) {
- info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_set_serial_signals(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- }
-
- /* Handle transition away from B0 status */
- if (!(old_termios->c_cflag & CBAUD) &&
- tty->termios->c_cflag & CBAUD) {
- info->serial_signals |= SerialSignal_DTR;
- if (!(tty->termios->c_cflag & CRTSCTS) ||
- !test_bit(TTY_THROTTLED, &tty->flags)) {
- info->serial_signals |= SerialSignal_RTS;
- }
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_set_serial_signals(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- }
-
- /* Handle turning off CRTSCTS */
- if (old_termios->c_cflag & CRTSCTS &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- mgsl_start(tty);
- }
-
-} /* end of mgsl_set_termios() */
-
-/* mgsl_close()
- *
- * Called when port is closed. Wait for remaining data to be
- * sent. Disable port and free resources.
- *
- * Arguments:
- *
- * tty pointer to open tty structure
- * filp pointer to open file object
- *
- * Return Value: None
- */
-static void mgsl_close(struct tty_struct *tty, struct file * filp)
-{
- struct mgsl_struct * info = tty->driver_data;
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_close"))
- return;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_close(%s) entry, count=%d\n",
- __FILE__,__LINE__, info->device_name, info->port.count);
-
- if (tty_port_close_start(&info->port, tty, filp) == 0)
- goto cleanup;
-
- mutex_lock(&info->port.mutex);
- if (info->port.flags & ASYNC_INITIALIZED)
- mgsl_wait_until_sent(tty, info->timeout);
- mgsl_flush_buffer(tty);
- tty_ldisc_flush(tty);
- shutdown(info);
- mutex_unlock(&info->port.mutex);
-
- tty_port_close_end(&info->port, tty);
- info->port.tty = NULL;
-cleanup:
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_close(%s) exit, count=%d\n", __FILE__,__LINE__,
- tty->driver->name, info->port.count);
-
-} /* end of mgsl_close() */
-
-/* mgsl_wait_until_sent()
- *
- * Wait until the transmitter is empty.
- *
- * Arguments:
- *
- * tty pointer to tty info structure
- * timeout time to wait for send completion
- *
- * Return Value: None
- */
-static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout)
-{
- struct mgsl_struct * info = tty->driver_data;
- unsigned long orig_jiffies, char_time;
-
- if (!info )
- return;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_wait_until_sent(%s) entry\n",
- __FILE__,__LINE__, info->device_name );
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_wait_until_sent"))
- return;
-
- if (!(info->port.flags & ASYNC_INITIALIZED))
- goto exit;
-
- orig_jiffies = jiffies;
-
- /* Set check interval to 1/5 of estimated time to
- * send a character, and make it at least 1. The check
- * interval should also be less than the timeout.
- * Note: use tight timings here to satisfy the NIST-PCTS.
- */
-
- if ( info->params.data_rate ) {
- char_time = info->timeout/(32 * 5);
- if (!char_time)
- char_time++;
- } else
- char_time = 1;
-
- if (timeout)
- char_time = min_t(unsigned long, char_time, timeout);
-
- if ( info->params.mode == MGSL_MODE_HDLC ||
- info->params.mode == MGSL_MODE_RAW ) {
- while (info->tx_active) {
- msleep_interruptible(jiffies_to_msecs(char_time));
- if (signal_pending(current))
- break;
- if (timeout && time_after(jiffies, orig_jiffies + timeout))
- break;
- }
- } else {
- while (!(usc_InReg(info,TCSR) & TXSTATUS_ALL_SENT) &&
- info->tx_enabled) {
- msleep_interruptible(jiffies_to_msecs(char_time));
- if (signal_pending(current))
- break;
- if (timeout && time_after(jiffies, orig_jiffies + timeout))
- break;
- }
- }
-
-exit:
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_wait_until_sent(%s) exit\n",
- __FILE__,__LINE__, info->device_name );
-
-} /* end of mgsl_wait_until_sent() */
-
-/* mgsl_hangup()
- *
- * Called by tty_hangup() when a hangup is signaled.
- * This is the same as to closing all open files for the port.
- *
- * Arguments: tty pointer to associated tty object
- * Return Value: None
- */
-static void mgsl_hangup(struct tty_struct *tty)
-{
- struct mgsl_struct * info = tty->driver_data;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_hangup(%s)\n",
- __FILE__,__LINE__, info->device_name );
-
- if (mgsl_paranoia_check(info, tty->name, "mgsl_hangup"))
- return;
-
- mgsl_flush_buffer(tty);
- shutdown(info);
-
- info->port.count = 0;
- info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
- info->port.tty = NULL;
-
- wake_up_interruptible(&info->port.open_wait);
-
-} /* end of mgsl_hangup() */
-
-/*
- * carrier_raised()
- *
- * Return true if carrier is raised
- */
-
-static int carrier_raised(struct tty_port *port)
-{
- unsigned long flags;
- struct mgsl_struct *info = container_of(port, struct mgsl_struct, port);
-
- spin_lock_irqsave(&info->irq_spinlock, flags);
- usc_get_serial_signals(info);
- spin_unlock_irqrestore(&info->irq_spinlock, flags);
- return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
-}
-
-static void dtr_rts(struct tty_port *port, int on)
-{
- struct mgsl_struct *info = container_of(port, struct mgsl_struct, port);
- unsigned long flags;
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if (on)
- info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
- else
- info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
- usc_set_serial_signals(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-}
-
-
-/* block_til_ready()
- *
- * Block the current process until the specified port
- * is ready to be opened.
- *
- * Arguments:
- *
- * tty pointer to tty info structure
- * filp pointer to open file object
- * info pointer to device instance data
- *
- * Return Value: 0 if success, otherwise error code
- */
-static int block_til_ready(struct tty_struct *tty, struct file * filp,
- struct mgsl_struct *info)
-{
- DECLARE_WAITQUEUE(wait, current);
- int retval;
- bool do_clocal = false;
- bool extra_count = false;
- unsigned long flags;
- int dcd;
- struct tty_port *port = &info->port;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):block_til_ready on %s\n",
- __FILE__,__LINE__, tty->driver->name );
-
- if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
- /* nonblock mode is set or port is not enabled */
- port->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
- }
-
- if (tty->termios->c_cflag & CLOCAL)
- do_clocal = true;
-
- /* Wait for carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, port->count is dropped by one, so that
- * mgsl_close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
-
- retval = 0;
- add_wait_queue(&port->open_wait, &wait);
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):block_til_ready before block on %s count=%d\n",
- __FILE__,__LINE__, tty->driver->name, port->count );
-
- spin_lock_irqsave(&info->irq_spinlock, flags);
- if (!tty_hung_up_p(filp)) {
- extra_count = true;
- port->count--;
- }
- spin_unlock_irqrestore(&info->irq_spinlock, flags);
- port->blocked_open++;
-
- while (1) {
- if (tty->termios->c_cflag & CBAUD)
- tty_port_raise_dtr_rts(port);
-
- set_current_state(TASK_INTERRUPTIBLE);
-
- if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
- retval = (port->flags & ASYNC_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS;
- break;
- }
-
- dcd = tty_port_carrier_raised(&info->port);
-
- if (!(port->flags & ASYNC_CLOSING) && (do_clocal || dcd))
- break;
-
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):block_til_ready blocking on %s count=%d\n",
- __FILE__,__LINE__, tty->driver->name, port->count );
-
- tty_unlock();
- schedule();
- tty_lock();
- }
-
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&port->open_wait, &wait);
-
- /* FIXME: Racy on hangup during close wait */
- if (extra_count)
- port->count++;
- port->blocked_open--;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
- __FILE__,__LINE__, tty->driver->name, port->count );
-
- if (!retval)
- port->flags |= ASYNC_NORMAL_ACTIVE;
-
- return retval;
-
-} /* end of block_til_ready() */
-
-/* mgsl_open()
- *
- * Called when a port is opened. Init and enable port.
- * Perform serial-specific initialization for the tty structure.
- *
- * Arguments: tty pointer to tty info structure
- * filp associated file pointer
- *
- * Return Value: 0 if success, otherwise error code
- */
-static int mgsl_open(struct tty_struct *tty, struct file * filp)
-{
- struct mgsl_struct *info;
- int retval, line;
- unsigned long flags;
-
- /* verify range of specified line number */
- line = tty->index;
- if ((line < 0) || (line >= mgsl_device_count)) {
- printk("%s(%d):mgsl_open with invalid line #%d.\n",
- __FILE__,__LINE__,line);
- return -ENODEV;
- }
-
- /* find the info structure for the specified line */
- info = mgsl_device_list;
- while(info && info->line != line)
- info = info->next_device;
- if (mgsl_paranoia_check(info, tty->name, "mgsl_open"))
- return -ENODEV;
-
- tty->driver_data = info;
- info->port.tty = tty;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_open(%s), old ref count = %d\n",
- __FILE__,__LINE__,tty->driver->name, info->port.count);
-
- /* If port is closing, signal caller to try again */
- if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
- if (info->port.flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->port.close_wait);
- retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS);
- goto cleanup;
- }
-
- info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
- spin_lock_irqsave(&info->netlock, flags);
- if (info->netcount) {
- retval = -EBUSY;
- spin_unlock_irqrestore(&info->netlock, flags);
- goto cleanup;
- }
- info->port.count++;
- spin_unlock_irqrestore(&info->netlock, flags);
-
- if (info->port.count == 1) {
- /* 1st open on this device, init hardware */
- retval = startup(info);
- if (retval < 0)
- goto cleanup;
- }
-
- retval = block_til_ready(tty, filp, info);
- if (retval) {
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):block_til_ready(%s) returned %d\n",
- __FILE__,__LINE__, info->device_name, retval);
- goto cleanup;
- }
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):mgsl_open(%s) success\n",
- __FILE__,__LINE__, info->device_name);
- retval = 0;
-
-cleanup:
- if (retval) {
- if (tty->count == 1)
- info->port.tty = NULL; /* tty layer will release tty struct */
- if(info->port.count)
- info->port.count--;
- }
-
- return retval;
-
-} /* end of mgsl_open() */
-
-/*
- * /proc fs routines....
- */
-
-static inline void line_info(struct seq_file *m, struct mgsl_struct *info)
-{
- char stat_buf[30];
- unsigned long flags;
-
- if (info->bus_type == MGSL_BUS_TYPE_PCI) {
- seq_printf(m, "%s:PCI io:%04X irq:%d mem:%08X lcr:%08X",
- info->device_name, info->io_base, info->irq_level,
- info->phys_memory_base, info->phys_lcr_base);
- } else {
- seq_printf(m, "%s:(E)ISA io:%04X irq:%d dma:%d",
- info->device_name, info->io_base,
- info->irq_level, info->dma_level);
- }
-
- /* output current serial signal states */
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_get_serial_signals(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- stat_buf[0] = 0;
- stat_buf[1] = 0;
- if (info->serial_signals & SerialSignal_RTS)
- strcat(stat_buf, "|RTS");
- if (info->serial_signals & SerialSignal_CTS)
- strcat(stat_buf, "|CTS");
- if (info->serial_signals & SerialSignal_DTR)
- strcat(stat_buf, "|DTR");
- if (info->serial_signals & SerialSignal_DSR)
- strcat(stat_buf, "|DSR");
- if (info->serial_signals & SerialSignal_DCD)
- strcat(stat_buf, "|CD");
- if (info->serial_signals & SerialSignal_RI)
- strcat(stat_buf, "|RI");
-
- if (info->params.mode == MGSL_MODE_HDLC ||
- info->params.mode == MGSL_MODE_RAW ) {
- seq_printf(m, " HDLC txok:%d rxok:%d",
- info->icount.txok, info->icount.rxok);
- if (info->icount.txunder)
- seq_printf(m, " txunder:%d", info->icount.txunder);
- if (info->icount.txabort)
- seq_printf(m, " txabort:%d", info->icount.txabort);
- if (info->icount.rxshort)
- seq_printf(m, " rxshort:%d", info->icount.rxshort);
- if (info->icount.rxlong)
- seq_printf(m, " rxlong:%d", info->icount.rxlong);
- if (info->icount.rxover)
- seq_printf(m, " rxover:%d", info->icount.rxover);
- if (info->icount.rxcrc)
- seq_printf(m, " rxcrc:%d", info->icount.rxcrc);
- } else {
- seq_printf(m, " ASYNC tx:%d rx:%d",
- info->icount.tx, info->icount.rx);
- if (info->icount.frame)
- seq_printf(m, " fe:%d", info->icount.frame);
- if (info->icount.parity)
- seq_printf(m, " pe:%d", info->icount.parity);
- if (info->icount.brk)
- seq_printf(m, " brk:%d", info->icount.brk);
- if (info->icount.overrun)
- seq_printf(m, " oe:%d", info->icount.overrun);
- }
-
- /* Append serial signal status to end */
- seq_printf(m, " %s\n", stat_buf+1);
-
- seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
- info->tx_active,info->bh_requested,info->bh_running,
- info->pending_bh);
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- {
- u16 Tcsr = usc_InReg( info, TCSR );
- u16 Tdmr = usc_InDmaReg( info, TDMR );
- u16 Ticr = usc_InReg( info, TICR );
- u16 Rscr = usc_InReg( info, RCSR );
- u16 Rdmr = usc_InDmaReg( info, RDMR );
- u16 Ricr = usc_InReg( info, RICR );
- u16 Icr = usc_InReg( info, ICR );
- u16 Dccr = usc_InReg( info, DCCR );
- u16 Tmr = usc_InReg( info, TMR );
- u16 Tccr = usc_InReg( info, TCCR );
- u16 Ccar = inw( info->io_base + CCAR );
- seq_printf(m, "tcsr=%04X tdmr=%04X ticr=%04X rcsr=%04X rdmr=%04X\n"
- "ricr=%04X icr =%04X dccr=%04X tmr=%04X tccr=%04X ccar=%04X\n",
- Tcsr,Tdmr,Ticr,Rscr,Rdmr,Ricr,Icr,Dccr,Tmr,Tccr,Ccar );
- }
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-}
-
-/* Called to print information about devices */
-static int mgsl_proc_show(struct seq_file *m, void *v)
-{
- struct mgsl_struct *info;
-
- seq_printf(m, "synclink driver:%s\n", driver_version);
-
- info = mgsl_device_list;
- while( info ) {
- line_info(m, info);
- info = info->next_device;
- }
- return 0;
-}
-
-static int mgsl_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, mgsl_proc_show, NULL);
-}
-
-static const struct file_operations mgsl_proc_fops = {
- .owner = THIS_MODULE,
- .open = mgsl_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-/* mgsl_allocate_dma_buffers()
- *
- * Allocate and format DMA buffers (ISA adapter)
- * or format shared memory buffers (PCI adapter).
- *
- * Arguments: info pointer to device instance data
- * Return Value: 0 if success, otherwise error
- */
-static int mgsl_allocate_dma_buffers(struct mgsl_struct *info)
-{
- unsigned short BuffersPerFrame;
-
- info->last_mem_alloc = 0;
-
- /* Calculate the number of DMA buffers necessary to hold the */
- /* largest allowable frame size. Note: If the max frame size is */
- /* not an even multiple of the DMA buffer size then we need to */
- /* round the buffer count per frame up one. */
-
- BuffersPerFrame = (unsigned short)(info->max_frame_size/DMABUFFERSIZE);
- if ( info->max_frame_size % DMABUFFERSIZE )
- BuffersPerFrame++;
-
- if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
- /*
- * The PCI adapter has 256KBytes of shared memory to use.
- * This is 64 PAGE_SIZE buffers.
- *
- * The first page is used for padding at this time so the
- * buffer list does not begin at offset 0 of the PCI
- * adapter's shared memory.
- *
- * The 2nd page is used for the buffer list. A 4K buffer
- * list can hold 128 DMA_BUFFER structures at 32 bytes
- * each.
- *
- * This leaves 62 4K pages.
- *
- * The next N pages are used for transmit frame(s). We
- * reserve enough 4K page blocks to hold the required
- * number of transmit dma buffers (num_tx_dma_buffers),
- * each of MaxFrameSize size.
- *
- * Of the remaining pages (62-N), determine how many can
- * be used to receive full MaxFrameSize inbound frames
- */
- info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame;
- info->rx_buffer_count = 62 - info->tx_buffer_count;
- } else {
- /* Calculate the number of PAGE_SIZE buffers needed for */
- /* receive and transmit DMA buffers. */
-
-
- /* Calculate the number of DMA buffers necessary to */
- /* hold 7 max size receive frames and one max size transmit frame. */
- /* The receive buffer count is bumped by one so we avoid an */
- /* End of List condition if all receive buffers are used when */
- /* using linked list DMA buffers. */
-
- info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame;
- info->rx_buffer_count = (BuffersPerFrame * MAXRXFRAMES) + 6;
-
- /*
- * limit total TxBuffers & RxBuffers to 62 4K total
- * (ala PCI Allocation)
- */
-
- if ( (info->tx_buffer_count + info->rx_buffer_count) > 62 )
- info->rx_buffer_count = 62 - info->tx_buffer_count;
-
- }
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk("%s(%d):Allocating %d TX and %d RX DMA buffers.\n",
- __FILE__,__LINE__, info->tx_buffer_count,info->rx_buffer_count);
-
- if ( mgsl_alloc_buffer_list_memory( info ) < 0 ||
- mgsl_alloc_frame_memory(info, info->rx_buffer_list, info->rx_buffer_count) < 0 ||
- mgsl_alloc_frame_memory(info, info->tx_buffer_list, info->tx_buffer_count) < 0 ||
- mgsl_alloc_intermediate_rxbuffer_memory(info) < 0 ||
- mgsl_alloc_intermediate_txbuffer_memory(info) < 0 ) {
- printk("%s(%d):Can't allocate DMA buffer memory\n",__FILE__,__LINE__);
- return -ENOMEM;
- }
-
- mgsl_reset_rx_dma_buffers( info );
- mgsl_reset_tx_dma_buffers( info );
-
- return 0;
-
-} /* end of mgsl_allocate_dma_buffers() */
-
-/*
- * mgsl_alloc_buffer_list_memory()
- *
- * Allocate a common DMA buffer for use as the
- * receive and transmit buffer lists.
- *
- * A buffer list is a set of buffer entries where each entry contains
- * a pointer to an actual buffer and a pointer to the next buffer entry
- * (plus some other info about the buffer).
- *
- * The buffer entries for a list are built to form a circular list so
- * that when the entire list has been traversed you start back at the
- * beginning.
- *
- * This function allocates memory for just the buffer entries.
- * The links (pointer to next entry) are filled in with the physical
- * address of the next entry so the adapter can navigate the list
- * using bus master DMA. The pointers to the actual buffers are filled
- * out later when the actual buffers are allocated.
- *
- * Arguments: info pointer to device instance data
- * Return Value: 0 if success, otherwise error
- */
-static int mgsl_alloc_buffer_list_memory( struct mgsl_struct *info )
-{
- unsigned int i;
-
- if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
- /* PCI adapter uses shared memory. */
- info->buffer_list = info->memory_base + info->last_mem_alloc;
- info->buffer_list_phys = info->last_mem_alloc;
- info->last_mem_alloc += BUFFERLISTSIZE;
- } else {
- /* ISA adapter uses system memory. */
- /* The buffer lists are allocated as a common buffer that both */
- /* the processor and adapter can access. This allows the driver to */
- /* inspect portions of the buffer while other portions are being */
- /* updated by the adapter using Bus Master DMA. */
-
- info->buffer_list = dma_alloc_coherent(NULL, BUFFERLISTSIZE, &info->buffer_list_dma_addr, GFP_KERNEL);
- if (info->buffer_list == NULL)
- return -ENOMEM;
- info->buffer_list_phys = (u32)(info->buffer_list_dma_addr);
- }
-
- /* We got the memory for the buffer entry lists. */
- /* Initialize the memory block to all zeros. */
- memset( info->buffer_list, 0, BUFFERLISTSIZE );
-
- /* Save virtual address pointers to the receive and */
- /* transmit buffer lists. (Receive 1st). These pointers will */
- /* be used by the processor to access the lists. */
- info->rx_buffer_list = (DMABUFFERENTRY *)info->buffer_list;
- info->tx_buffer_list = (DMABUFFERENTRY *)info->buffer_list;
- info->tx_buffer_list += info->rx_buffer_count;
-
- /*
- * Build the links for the buffer entry lists such that
- * two circular lists are built. (Transmit and Receive).
- *
- * Note: the links are physical addresses
- * which are read by the adapter to determine the next
- * buffer entry to use.
- */
-
- for ( i = 0; i < info->rx_buffer_count; i++ ) {
- /* calculate and store physical address of this buffer entry */
- info->rx_buffer_list[i].phys_entry =
- info->buffer_list_phys + (i * sizeof(DMABUFFERENTRY));
-
- /* calculate and store physical address of */
- /* next entry in cirular list of entries */
-
- info->rx_buffer_list[i].link = info->buffer_list_phys;
-
- if ( i < info->rx_buffer_count - 1 )
- info->rx_buffer_list[i].link += (i + 1) * sizeof(DMABUFFERENTRY);
- }
-
- for ( i = 0; i < info->tx_buffer_count; i++ ) {
- /* calculate and store physical address of this buffer entry */
- info->tx_buffer_list[i].phys_entry = info->buffer_list_phys +
- ((info->rx_buffer_count + i) * sizeof(DMABUFFERENTRY));
-
- /* calculate and store physical address of */
- /* next entry in cirular list of entries */
-
- info->tx_buffer_list[i].link = info->buffer_list_phys +
- info->rx_buffer_count * sizeof(DMABUFFERENTRY);
-
- if ( i < info->tx_buffer_count - 1 )
- info->tx_buffer_list[i].link += (i + 1) * sizeof(DMABUFFERENTRY);
- }
-
- return 0;
-
-} /* end of mgsl_alloc_buffer_list_memory() */
-
-/* Free DMA buffers allocated for use as the
- * receive and transmit buffer lists.
- * Warning:
- *
- * The data transfer buffers associated with the buffer list
- * MUST be freed before freeing the buffer list itself because
- * the buffer list contains the information necessary to free
- * the individual buffers!
- */
-static void mgsl_free_buffer_list_memory( struct mgsl_struct *info )
-{
- if (info->buffer_list && info->bus_type != MGSL_BUS_TYPE_PCI)
- dma_free_coherent(NULL, BUFFERLISTSIZE, info->buffer_list, info->buffer_list_dma_addr);
-
- info->buffer_list = NULL;
- info->rx_buffer_list = NULL;
- info->tx_buffer_list = NULL;
-
-} /* end of mgsl_free_buffer_list_memory() */
-
-/*
- * mgsl_alloc_frame_memory()
- *
- * Allocate the frame DMA buffers used by the specified buffer list.
- * Each DMA buffer will be one memory page in size. This is necessary
- * because memory can fragment enough that it may be impossible
- * contiguous pages.
- *
- * Arguments:
- *
- * info pointer to device instance data
- * BufferList pointer to list of buffer entries
- * Buffercount count of buffer entries in buffer list
- *
- * Return Value: 0 if success, otherwise -ENOMEM
- */
-static int mgsl_alloc_frame_memory(struct mgsl_struct *info,DMABUFFERENTRY *BufferList,int Buffercount)
-{
- int i;
- u32 phys_addr;
-
- /* Allocate page sized buffers for the receive buffer list */
-
- for ( i = 0; i < Buffercount; i++ ) {
- if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
- /* PCI adapter uses shared memory buffers. */
- BufferList[i].virt_addr = info->memory_base + info->last_mem_alloc;
- phys_addr = info->last_mem_alloc;
- info->last_mem_alloc += DMABUFFERSIZE;
- } else {
- /* ISA adapter uses system memory. */
- BufferList[i].virt_addr = dma_alloc_coherent(NULL, DMABUFFERSIZE, &BufferList[i].dma_addr, GFP_KERNEL);
- if (BufferList[i].virt_addr == NULL)
- return -ENOMEM;
- phys_addr = (u32)(BufferList[i].dma_addr);
- }
- BufferList[i].phys_addr = phys_addr;
- }
-
- return 0;
-
-} /* end of mgsl_alloc_frame_memory() */
-
-/*
- * mgsl_free_frame_memory()
- *
- * Free the buffers associated with
- * each buffer entry of a buffer list.
- *
- * Arguments:
- *
- * info pointer to device instance data
- * BufferList pointer to list of buffer entries
- * Buffercount count of buffer entries in buffer list
- *
- * Return Value: None
- */
-static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList, int Buffercount)
-{
- int i;
-
- if ( BufferList ) {
- for ( i = 0 ; i < Buffercount ; i++ ) {
- if ( BufferList[i].virt_addr ) {
- if ( info->bus_type != MGSL_BUS_TYPE_PCI )
- dma_free_coherent(NULL, DMABUFFERSIZE, BufferList[i].virt_addr, BufferList[i].dma_addr);
- BufferList[i].virt_addr = NULL;
- }
- }
- }
-
-} /* end of mgsl_free_frame_memory() */
-
-/* mgsl_free_dma_buffers()
- *
- * Free DMA buffers
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void mgsl_free_dma_buffers( struct mgsl_struct *info )
-{
- mgsl_free_frame_memory( info, info->rx_buffer_list, info->rx_buffer_count );
- mgsl_free_frame_memory( info, info->tx_buffer_list, info->tx_buffer_count );
- mgsl_free_buffer_list_memory( info );
-
-} /* end of mgsl_free_dma_buffers() */
-
-
-/*
- * mgsl_alloc_intermediate_rxbuffer_memory()
- *
- * Allocate a buffer large enough to hold max_frame_size. This buffer
- * is used to pass an assembled frame to the line discipline.
- *
- * Arguments:
- *
- * info pointer to device instance data
- *
- * Return Value: 0 if success, otherwise -ENOMEM
- */
-static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info)
-{
- info->intermediate_rxbuffer = kmalloc(info->max_frame_size, GFP_KERNEL | GFP_DMA);
- if ( info->intermediate_rxbuffer == NULL )
- return -ENOMEM;
-
- return 0;
-
-} /* end of mgsl_alloc_intermediate_rxbuffer_memory() */
-
-/*
- * mgsl_free_intermediate_rxbuffer_memory()
- *
- *
- * Arguments:
- *
- * info pointer to device instance data
- *
- * Return Value: None
- */
-static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info)
-{
- kfree(info->intermediate_rxbuffer);
- info->intermediate_rxbuffer = NULL;
-
-} /* end of mgsl_free_intermediate_rxbuffer_memory() */
-
-/*
- * mgsl_alloc_intermediate_txbuffer_memory()
- *
- * Allocate intermdiate transmit buffer(s) large enough to hold max_frame_size.
- * This buffer is used to load transmit frames into the adapter's dma transfer
- * buffers when there is sufficient space.
- *
- * Arguments:
- *
- * info pointer to device instance data
- *
- * Return Value: 0 if success, otherwise -ENOMEM
- */
-static int mgsl_alloc_intermediate_txbuffer_memory(struct mgsl_struct *info)
-{
- int i;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk("%s %s(%d) allocating %d tx holding buffers\n",
- info->device_name, __FILE__,__LINE__,info->num_tx_holding_buffers);
-
- memset(info->tx_holding_buffers,0,sizeof(info->tx_holding_buffers));
-
- for ( i=0; i<info->num_tx_holding_buffers; ++i) {
- info->tx_holding_buffers[i].buffer =
- kmalloc(info->max_frame_size, GFP_KERNEL);
- if (info->tx_holding_buffers[i].buffer == NULL) {
- for (--i; i >= 0; i--) {
- kfree(info->tx_holding_buffers[i].buffer);
- info->tx_holding_buffers[i].buffer = NULL;
- }
- return -ENOMEM;
- }
- }
-
- return 0;
-
-} /* end of mgsl_alloc_intermediate_txbuffer_memory() */
-
-/*
- * mgsl_free_intermediate_txbuffer_memory()
- *
- *
- * Arguments:
- *
- * info pointer to device instance data
- *
- * Return Value: None
- */
-static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info)
-{
- int i;
-
- for ( i=0; i<info->num_tx_holding_buffers; ++i ) {
- kfree(info->tx_holding_buffers[i].buffer);
- info->tx_holding_buffers[i].buffer = NULL;
- }
-
- info->get_tx_holding_index = 0;
- info->put_tx_holding_index = 0;
- info->tx_holding_count = 0;
-
-} /* end of mgsl_free_intermediate_txbuffer_memory() */
-
-
-/*
- * load_next_tx_holding_buffer()
- *
- * attempts to load the next buffered tx request into the
- * tx dma buffers
- *
- * Arguments:
- *
- * info pointer to device instance data
- *
- * Return Value: true if next buffered tx request loaded
- * into adapter's tx dma buffer,
- * false otherwise
- */
-static bool load_next_tx_holding_buffer(struct mgsl_struct *info)
-{
- bool ret = false;
-
- if ( info->tx_holding_count ) {
- /* determine if we have enough tx dma buffers
- * to accommodate the next tx frame
- */
- struct tx_holding_buffer *ptx =
- &info->tx_holding_buffers[info->get_tx_holding_index];
- int num_free = num_free_tx_dma_buffers(info);
- int num_needed = ptx->buffer_size / DMABUFFERSIZE;
- if ( ptx->buffer_size % DMABUFFERSIZE )
- ++num_needed;
-
- if (num_needed <= num_free) {
- info->xmit_cnt = ptx->buffer_size;
- mgsl_load_tx_dma_buffer(info,ptx->buffer,ptx->buffer_size);
-
- --info->tx_holding_count;
- if ( ++info->get_tx_holding_index >= info->num_tx_holding_buffers)
- info->get_tx_holding_index=0;
-
- /* restart transmit timer */
- mod_timer(&info->tx_timer, jiffies + msecs_to_jiffies(5000));
-
- ret = true;
- }
- }
-
- return ret;
-}
-
-/*
- * save_tx_buffer_request()
- *
- * attempt to store transmit frame request for later transmission
- *
- * Arguments:
- *
- * info pointer to device instance data
- * Buffer pointer to buffer containing frame to load
- * BufferSize size in bytes of frame in Buffer
- *
- * Return Value: 1 if able to store, 0 otherwise
- */
-static int save_tx_buffer_request(struct mgsl_struct *info,const char *Buffer, unsigned int BufferSize)
-{
- struct tx_holding_buffer *ptx;
-
- if ( info->tx_holding_count >= info->num_tx_holding_buffers ) {
- return 0; /* all buffers in use */
- }
-
- ptx = &info->tx_holding_buffers[info->put_tx_holding_index];
- ptx->buffer_size = BufferSize;
- memcpy( ptx->buffer, Buffer, BufferSize);
-
- ++info->tx_holding_count;
- if ( ++info->put_tx_holding_index >= info->num_tx_holding_buffers)
- info->put_tx_holding_index=0;
-
- return 1;
-}
-
-static int mgsl_claim_resources(struct mgsl_struct *info)
-{
- if (request_region(info->io_base,info->io_addr_size,"synclink") == NULL) {
- printk( "%s(%d):I/O address conflict on device %s Addr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->io_base);
- return -ENODEV;
- }
- info->io_addr_requested = true;
-
- if ( request_irq(info->irq_level,mgsl_interrupt,info->irq_flags,
- info->device_name, info ) < 0 ) {
- printk( "%s(%d):Cant request interrupt on device %s IRQ=%d\n",
- __FILE__,__LINE__,info->device_name, info->irq_level );
- goto errout;
- }
- info->irq_requested = true;
-
- if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
- if (request_mem_region(info->phys_memory_base,0x40000,"synclink") == NULL) {
- printk( "%s(%d):mem addr conflict device %s Addr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_memory_base);
- goto errout;
- }
- info->shared_mem_requested = true;
- if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclink") == NULL) {
- printk( "%s(%d):lcr mem addr conflict device %s Addr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_lcr_base + info->lcr_offset);
- goto errout;
- }
- info->lcr_mem_requested = true;
-
- info->memory_base = ioremap_nocache(info->phys_memory_base,
- 0x40000);
- if (!info->memory_base) {
- printk( "%s(%d):Cant map shared memory on device %s MemAddr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_memory_base );
- goto errout;
- }
-
- if ( !mgsl_memory_test(info) ) {
- printk( "%s(%d):Failed shared memory test %s MemAddr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_memory_base );
- goto errout;
- }
-
- info->lcr_base = ioremap_nocache(info->phys_lcr_base,
- PAGE_SIZE);
- if (!info->lcr_base) {
- printk( "%s(%d):Cant map LCR memory on device %s MemAddr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_lcr_base );
- goto errout;
- }
- info->lcr_base += info->lcr_offset;
-
- } else {
- /* claim DMA channel */
-
- if (request_dma(info->dma_level,info->device_name) < 0){
- printk( "%s(%d):Cant request DMA channel on device %s DMA=%d\n",
- __FILE__,__LINE__,info->device_name, info->dma_level );
- mgsl_release_resources( info );
- return -ENODEV;
- }
- info->dma_requested = true;
-
- /* ISA adapter uses bus master DMA */
- set_dma_mode(info->dma_level,DMA_MODE_CASCADE);
- enable_dma(info->dma_level);
- }
-
- if ( mgsl_allocate_dma_buffers(info) < 0 ) {
- printk( "%s(%d):Cant allocate DMA buffers on device %s DMA=%d\n",
- __FILE__,__LINE__,info->device_name, info->dma_level );
- goto errout;
- }
-
- return 0;
-errout:
- mgsl_release_resources(info);
- return -ENODEV;
-
-} /* end of mgsl_claim_resources() */
-
-static void mgsl_release_resources(struct mgsl_struct *info)
-{
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_release_resources(%s) entry\n",
- __FILE__,__LINE__,info->device_name );
-
- if ( info->irq_requested ) {
- free_irq(info->irq_level, info);
- info->irq_requested = false;
- }
- if ( info->dma_requested ) {
- disable_dma(info->dma_level);
- free_dma(info->dma_level);
- info->dma_requested = false;
- }
- mgsl_free_dma_buffers(info);
- mgsl_free_intermediate_rxbuffer_memory(info);
- mgsl_free_intermediate_txbuffer_memory(info);
-
- if ( info->io_addr_requested ) {
- release_region(info->io_base,info->io_addr_size);
- info->io_addr_requested = false;
- }
- if ( info->shared_mem_requested ) {
- release_mem_region(info->phys_memory_base,0x40000);
- info->shared_mem_requested = false;
- }
- if ( info->lcr_mem_requested ) {
- release_mem_region(info->phys_lcr_base + info->lcr_offset,128);
- info->lcr_mem_requested = false;
- }
- if (info->memory_base){
- iounmap(info->memory_base);
- info->memory_base = NULL;
- }
- if (info->lcr_base){
- iounmap(info->lcr_base - info->lcr_offset);
- info->lcr_base = NULL;
- }
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_release_resources(%s) exit\n",
- __FILE__,__LINE__,info->device_name );
-
-} /* end of mgsl_release_resources() */
-
-/* mgsl_add_device()
- *
- * Add the specified device instance data structure to the
- * global linked list of devices and increment the device count.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void mgsl_add_device( struct mgsl_struct *info )
-{
- info->next_device = NULL;
- info->line = mgsl_device_count;
- sprintf(info->device_name,"ttySL%d",info->line);
-
- if (info->line < MAX_TOTAL_DEVICES) {
- if (maxframe[info->line])
- info->max_frame_size = maxframe[info->line];
-
- if (txdmabufs[info->line]) {
- info->num_tx_dma_buffers = txdmabufs[info->line];
- if (info->num_tx_dma_buffers < 1)
- info->num_tx_dma_buffers = 1;
- }
-
- if (txholdbufs[info->line]) {
- info->num_tx_holding_buffers = txholdbufs[info->line];
- if (info->num_tx_holding_buffers < 1)
- info->num_tx_holding_buffers = 1;
- else if (info->num_tx_holding_buffers > MAX_TX_HOLDING_BUFFERS)
- info->num_tx_holding_buffers = MAX_TX_HOLDING_BUFFERS;
- }
- }
-
- mgsl_device_count++;
-
- if ( !mgsl_device_list )
- mgsl_device_list = info;
- else {
- struct mgsl_struct *current_dev = mgsl_device_list;
- while( current_dev->next_device )
- current_dev = current_dev->next_device;
- current_dev->next_device = info;
- }
-
- if ( info->max_frame_size < 4096 )
- info->max_frame_size = 4096;
- else if ( info->max_frame_size > 65535 )
- info->max_frame_size = 65535;
-
- if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
- printk( "SyncLink PCI v%d %s: IO=%04X IRQ=%d Mem=%08X,%08X MaxFrameSize=%u\n",
- info->hw_version + 1, info->device_name, info->io_base, info->irq_level,
- info->phys_memory_base, info->phys_lcr_base,
- info->max_frame_size );
- } else {
- printk( "SyncLink ISA %s: IO=%04X IRQ=%d DMA=%d MaxFrameSize=%u\n",
- info->device_name, info->io_base, info->irq_level, info->dma_level,
- info->max_frame_size );
- }
-
-#if SYNCLINK_GENERIC_HDLC
- hdlcdev_init(info);
-#endif
-
-} /* end of mgsl_add_device() */
-
-static const struct tty_port_operations mgsl_port_ops = {
- .carrier_raised = carrier_raised,
- .dtr_rts = dtr_rts,
-};
-
-
-/* mgsl_allocate_device()
- *
- * Allocate and initialize a device instance structure
- *
- * Arguments: none
- * Return Value: pointer to mgsl_struct if success, otherwise NULL
- */
-static struct mgsl_struct* mgsl_allocate_device(void)
-{
- struct mgsl_struct *info;
-
- info = kzalloc(sizeof(struct mgsl_struct),
- GFP_KERNEL);
-
- if (!info) {
- printk("Error can't allocate device instance data\n");
- } else {
- tty_port_init(&info->port);
- info->port.ops = &mgsl_port_ops;
- info->magic = MGSL_MAGIC;
- INIT_WORK(&info->task, mgsl_bh_handler);
- info->max_frame_size = 4096;
- info->port.close_delay = 5*HZ/10;
- info->port.closing_wait = 30*HZ;
- init_waitqueue_head(&info->status_event_wait_q);
- init_waitqueue_head(&info->event_wait_q);
- spin_lock_init(&info->irq_spinlock);
- spin_lock_init(&info->netlock);
- memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
- info->idle_mode = HDLC_TXIDLE_FLAGS;
- info->num_tx_dma_buffers = 1;
- info->num_tx_holding_buffers = 0;
- }
-
- return info;
-
-} /* end of mgsl_allocate_device()*/
-
-static const struct tty_operations mgsl_ops = {
- .open = mgsl_open,
- .close = mgsl_close,
- .write = mgsl_write,
- .put_char = mgsl_put_char,
- .flush_chars = mgsl_flush_chars,
- .write_room = mgsl_write_room,
- .chars_in_buffer = mgsl_chars_in_buffer,
- .flush_buffer = mgsl_flush_buffer,
- .ioctl = mgsl_ioctl,
- .throttle = mgsl_throttle,
- .unthrottle = mgsl_unthrottle,
- .send_xchar = mgsl_send_xchar,
- .break_ctl = mgsl_break,
- .wait_until_sent = mgsl_wait_until_sent,
- .set_termios = mgsl_set_termios,
- .stop = mgsl_stop,
- .start = mgsl_start,
- .hangup = mgsl_hangup,
- .tiocmget = tiocmget,
- .tiocmset = tiocmset,
- .get_icount = msgl_get_icount,
- .proc_fops = &mgsl_proc_fops,
-};
-
-/*
- * perform tty device initialization
- */
-static int mgsl_init_tty(void)
-{
- int rc;
-
- serial_driver = alloc_tty_driver(128);
- if (!serial_driver)
- return -ENOMEM;
-
- serial_driver->owner = THIS_MODULE;
- serial_driver->driver_name = "synclink";
- serial_driver->name = "ttySL";
- serial_driver->major = ttymajor;
- serial_driver->minor_start = 64;
- serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
- serial_driver->subtype = SERIAL_TYPE_NORMAL;
- serial_driver->init_termios = tty_std_termios;
- serial_driver->init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- serial_driver->init_termios.c_ispeed = 9600;
- serial_driver->init_termios.c_ospeed = 9600;
- serial_driver->flags = TTY_DRIVER_REAL_RAW;
- tty_set_operations(serial_driver, &mgsl_ops);
- if ((rc = tty_register_driver(serial_driver)) < 0) {
- printk("%s(%d):Couldn't register serial driver\n",
- __FILE__,__LINE__);
- put_tty_driver(serial_driver);
- serial_driver = NULL;
- return rc;
- }
-
- printk("%s %s, tty major#%d\n",
- driver_name, driver_version,
- serial_driver->major);
- return 0;
-}
-
-/* enumerate user specified ISA adapters
- */
-static void mgsl_enum_isa_devices(void)
-{
- struct mgsl_struct *info;
- int i;
-
- /* Check for user specified ISA devices */
-
- for (i=0 ;(i < MAX_ISA_DEVICES) && io[i] && irq[i]; i++){
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk("ISA device specified io=%04X,irq=%d,dma=%d\n",
- io[i], irq[i], dma[i] );
-
- info = mgsl_allocate_device();
- if ( !info ) {
- /* error allocating device instance data */
- if ( debug_level >= DEBUG_LEVEL_ERROR )
- printk( "can't allocate device instance data.\n");
- continue;
- }
-
- /* Copy user configuration info to device instance data */
- info->io_base = (unsigned int)io[i];
- info->irq_level = (unsigned int)irq[i];
- info->irq_level = irq_canonicalize(info->irq_level);
- info->dma_level = (unsigned int)dma[i];
- info->bus_type = MGSL_BUS_TYPE_ISA;
- info->io_addr_size = 16;
- info->irq_flags = 0;
-
- mgsl_add_device( info );
- }
-}
-
-static void synclink_cleanup(void)
-{
- int rc;
- struct mgsl_struct *info;
- struct mgsl_struct *tmp;
-
- printk("Unloading %s: %s\n", driver_name, driver_version);
-
- if (serial_driver) {
- if ((rc = tty_unregister_driver(serial_driver)))
- printk("%s(%d) failed to unregister tty driver err=%d\n",
- __FILE__,__LINE__,rc);
- put_tty_driver(serial_driver);
- }
-
- info = mgsl_device_list;
- while(info) {
-#if SYNCLINK_GENERIC_HDLC
- hdlcdev_exit(info);
-#endif
- mgsl_release_resources(info);
- tmp = info;
- info = info->next_device;
- kfree(tmp);
- }
-
- if (pci_registered)
- pci_unregister_driver(&synclink_pci_driver);
-}
-
-static int __init synclink_init(void)
-{
- int rc;
-
- if (break_on_load) {
- mgsl_get_text_ptr();
- BREAKPOINT();
- }
-
- printk("%s %s\n", driver_name, driver_version);
-
- mgsl_enum_isa_devices();
- if ((rc = pci_register_driver(&synclink_pci_driver)) < 0)
- printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc);
- else
- pci_registered = true;
-
- if ((rc = mgsl_init_tty()) < 0)
- goto error;
-
- return 0;
-
-error:
- synclink_cleanup();
- return rc;
-}
-
-static void __exit synclink_exit(void)
-{
- synclink_cleanup();
-}
-
-module_init(synclink_init);
-module_exit(synclink_exit);
-
-/*
- * usc_RTCmd()
- *
- * Issue a USC Receive/Transmit command to the
- * Channel Command/Address Register (CCAR).
- *
- * Notes:
- *
- * The command is encoded in the most significant 5 bits <15..11>
- * of the CCAR value. Bits <10..7> of the CCAR must be preserved
- * and Bits <6..0> must be written as zeros.
- *
- * Arguments:
- *
- * info pointer to device information structure
- * Cmd command mask (use symbolic macros)
- *
- * Return Value:
- *
- * None
- */
-static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd )
-{
- /* output command to CCAR in bits <15..11> */
- /* preserve bits <10..7>, bits <6..0> must be zero */
-
- outw( Cmd + info->loopback_bits, info->io_base + CCAR );
-
- /* Read to flush write to CCAR */
- if ( info->bus_type == MGSL_BUS_TYPE_PCI )
- inw( info->io_base + CCAR );
-
-} /* end of usc_RTCmd() */
-
-/*
- * usc_DmaCmd()
- *
- * Issue a DMA command to the DMA Command/Address Register (DCAR).
- *
- * Arguments:
- *
- * info pointer to device information structure
- * Cmd DMA command mask (usc_DmaCmd_XX Macros)
- *
- * Return Value:
- *
- * None
- */
-static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd )
-{
- /* write command mask to DCAR */
- outw( Cmd + info->mbre_bit, info->io_base );
-
- /* Read to flush write to DCAR */
- if ( info->bus_type == MGSL_BUS_TYPE_PCI )
- inw( info->io_base );
-
-} /* end of usc_DmaCmd() */
-
-/*
- * usc_OutDmaReg()
- *
- * Write a 16-bit value to a USC DMA register
- *
- * Arguments:
- *
- * info pointer to device info structure
- * RegAddr register address (number) for write
- * RegValue 16-bit value to write to register
- *
- * Return Value:
- *
- * None
- *
- */
-static void usc_OutDmaReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue )
-{
- /* Note: The DCAR is located at the adapter base address */
- /* Note: must preserve state of BIT8 in DCAR */
-
- outw( RegAddr + info->mbre_bit, info->io_base );
- outw( RegValue, info->io_base );
-
- /* Read to flush write to DCAR */
- if ( info->bus_type == MGSL_BUS_TYPE_PCI )
- inw( info->io_base );
-
-} /* end of usc_OutDmaReg() */
-
-/*
- * usc_InDmaReg()
- *
- * Read a 16-bit value from a DMA register
- *
- * Arguments:
- *
- * info pointer to device info structure
- * RegAddr register address (number) to read from
- *
- * Return Value:
- *
- * The 16-bit value read from register
- *
- */
-static u16 usc_InDmaReg( struct mgsl_struct *info, u16 RegAddr )
-{
- /* Note: The DCAR is located at the adapter base address */
- /* Note: must preserve state of BIT8 in DCAR */
-
- outw( RegAddr + info->mbre_bit, info->io_base );
- return inw( info->io_base );
-
-} /* end of usc_InDmaReg() */
-
-/*
- *
- * usc_OutReg()
- *
- * Write a 16-bit value to a USC serial channel register
- *
- * Arguments:
- *
- * info pointer to device info structure
- * RegAddr register address (number) to write to
- * RegValue 16-bit value to write to register
- *
- * Return Value:
- *
- * None
- *
- */
-static void usc_OutReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue )
-{
- outw( RegAddr + info->loopback_bits, info->io_base + CCAR );
- outw( RegValue, info->io_base + CCAR );
-
- /* Read to flush write to CCAR */
- if ( info->bus_type == MGSL_BUS_TYPE_PCI )
- inw( info->io_base + CCAR );
-
-} /* end of usc_OutReg() */
-
-/*
- * usc_InReg()
- *
- * Reads a 16-bit value from a USC serial channel register
- *
- * Arguments:
- *
- * info pointer to device extension
- * RegAddr register address (number) to read from
- *
- * Return Value:
- *
- * 16-bit value read from register
- */
-static u16 usc_InReg( struct mgsl_struct *info, u16 RegAddr )
-{
- outw( RegAddr + info->loopback_bits, info->io_base + CCAR );
- return inw( info->io_base + CCAR );
-
-} /* end of usc_InReg() */
-
-/* usc_set_sdlc_mode()
- *
- * Set up the adapter for SDLC DMA communications.
- *
- * Arguments: info pointer to device instance data
- * Return Value: NONE
- */
-static void usc_set_sdlc_mode( struct mgsl_struct *info )
-{
- u16 RegValue;
- bool PreSL1660;
-
- /*
- * determine if the IUSC on the adapter is pre-SL1660. If
- * not, take advantage of the UnderWait feature of more
- * modern chips. If an underrun occurs and this bit is set,
- * the transmitter will idle the programmed idle pattern
- * until the driver has time to service the underrun. Otherwise,
- * the dma controller may get the cycles previously requested
- * and begin transmitting queued tx data.
- */
- usc_OutReg(info,TMCR,0x1f);
- RegValue=usc_InReg(info,TMDR);
- PreSL1660 = (RegValue == IUSC_PRE_SL1660);
-
- if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
- {
- /*
- ** Channel Mode Register (CMR)
- **
- ** <15..14> 10 Tx Sub Modes, Send Flag on Underrun
- ** <13> 0 0 = Transmit Disabled (initially)
- ** <12> 0 1 = Consecutive Idles share common 0
- ** <11..8> 1110 Transmitter Mode = HDLC/SDLC Loop
- ** <7..4> 0000 Rx Sub Modes, addr/ctrl field handling
- ** <3..0> 0110 Receiver Mode = HDLC/SDLC
- **
- ** 1000 1110 0000 0110 = 0x8e06
- */
- RegValue = 0x8e06;
-
- /*--------------------------------------------------
- * ignore user options for UnderRun Actions and
- * preambles
- *--------------------------------------------------*/
- }
- else
- {
- /* Channel mode Register (CMR)
- *
- * <15..14> 00 Tx Sub modes, Underrun Action
- * <13> 0 1 = Send Preamble before opening flag
- * <12> 0 1 = Consecutive Idles share common 0
- * <11..8> 0110 Transmitter mode = HDLC/SDLC
- * <7..4> 0000 Rx Sub modes, addr/ctrl field handling
- * <3..0> 0110 Receiver mode = HDLC/SDLC
- *
- * 0000 0110 0000 0110 = 0x0606
- */
- if (info->params.mode == MGSL_MODE_RAW) {
- RegValue = 0x0001; /* Set Receive mode = external sync */
-
- usc_OutReg( info, IOCR, /* Set IOCR DCD is RxSync Detect Input */
- (unsigned short)((usc_InReg(info, IOCR) & ~(BIT13|BIT12)) | BIT12));
-
- /*
- * TxSubMode:
- * CMR <15> 0 Don't send CRC on Tx Underrun
- * CMR <14> x undefined
- * CMR <13> 0 Send preamble before openning sync
- * CMR <12> 0 Send 8-bit syncs, 1=send Syncs per TxLength
- *
- * TxMode:
- * CMR <11-8) 0100 MonoSync
- *
- * 0x00 0100 xxxx xxxx 04xx
- */
- RegValue |= 0x0400;
- }
- else {
-
- RegValue = 0x0606;
-
- if ( info->params.flags & HDLC_FLAG_UNDERRUN_ABORT15 )
- RegValue |= BIT14;
- else if ( info->params.flags & HDLC_FLAG_UNDERRUN_FLAG )
- RegValue |= BIT15;
- else if ( info->params.flags & HDLC_FLAG_UNDERRUN_CRC )
- RegValue |= BIT15 + BIT14;
- }
-
- if ( info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE )
- RegValue |= BIT13;
- }
-
- if ( info->params.mode == MGSL_MODE_HDLC &&
- (info->params.flags & HDLC_FLAG_SHARE_ZERO) )
- RegValue |= BIT12;
-
- if ( info->params.addr_filter != 0xff )
- {
- /* set up receive address filtering */
- usc_OutReg( info, RSR, info->params.addr_filter );
- RegValue |= BIT4;
- }
-
- usc_OutReg( info, CMR, RegValue );
- info->cmr_value = RegValue;
-
- /* Receiver mode Register (RMR)
- *
- * <15..13> 000 encoding
- * <12..11> 00 FCS = 16bit CRC CCITT (x15 + x12 + x5 + 1)
- * <10> 1 1 = Set CRC to all 1s (use for SDLC/HDLC)
- * <9> 0 1 = Include Receive chars in CRC
- * <8> 1 1 = Use Abort/PE bit as abort indicator
- * <7..6> 00 Even parity
- * <5> 0 parity disabled
- * <4..2> 000 Receive Char Length = 8 bits
- * <1..0> 00 Disable Receiver
- *
- * 0000 0101 0000 0000 = 0x0500
- */
-
- RegValue = 0x0500;
-
- switch ( info->params.encoding ) {
- case HDLC_ENCODING_NRZB: RegValue |= BIT13; break;
- case HDLC_ENCODING_NRZI_MARK: RegValue |= BIT14; break;
- case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT14 + BIT13; break;
- case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT15; break;
- case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT15 + BIT13; break;
- case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14; break;
- case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14 + BIT13; break;
- }
-
- if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_16_CCITT )
- RegValue |= BIT9;
- else if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_32_CCITT )
- RegValue |= ( BIT12 | BIT10 | BIT9 );
-
- usc_OutReg( info, RMR, RegValue );
-
- /* Set the Receive count Limit Register (RCLR) to 0xffff. */
- /* When an opening flag of an SDLC frame is recognized the */
- /* Receive Character count (RCC) is loaded with the value in */
- /* RCLR. The RCC is decremented for each received byte. The */
- /* value of RCC is stored after the closing flag of the frame */
- /* allowing the frame size to be computed. */
-
- usc_OutReg( info, RCLR, RCLRVALUE );
-
- usc_RCmd( info, RCmd_SelectRicrdma_level );
-
- /* Receive Interrupt Control Register (RICR)
- *
- * <15..8> ? RxFIFO DMA Request Level
- * <7> 0 Exited Hunt IA (Interrupt Arm)
- * <6> 0 Idle Received IA
- * <5> 0 Break/Abort IA
- * <4> 0 Rx Bound IA
- * <3> 1 Queued status reflects oldest 2 bytes in FIFO
- * <2> 0 Abort/PE IA
- * <1> 1 Rx Overrun IA
- * <0> 0 Select TC0 value for readback
- *
- * 0000 0000 0000 1000 = 0x000a
- */
-
- /* Carry over the Exit Hunt and Idle Received bits */
- /* in case they have been armed by usc_ArmEvents. */
-
- RegValue = usc_InReg( info, RICR ) & 0xc0;
-
- if ( info->bus_type == MGSL_BUS_TYPE_PCI )
- usc_OutReg( info, RICR, (u16)(0x030a | RegValue) );
- else
- usc_OutReg( info, RICR, (u16)(0x140a | RegValue) );
-
- /* Unlatch all Rx status bits and clear Rx status IRQ Pending */
-
- usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
- usc_ClearIrqPendingBits( info, RECEIVE_STATUS );
-
- /* Transmit mode Register (TMR)
- *
- * <15..13> 000 encoding
- * <12..11> 00 FCS = 16bit CRC CCITT (x15 + x12 + x5 + 1)
- * <10> 1 1 = Start CRC as all 1s (use for SDLC/HDLC)
- * <9> 0 1 = Tx CRC Enabled
- * <8> 0 1 = Append CRC to end of transmit frame
- * <7..6> 00 Transmit parity Even
- * <5> 0 Transmit parity Disabled
- * <4..2> 000 Tx Char Length = 8 bits
- * <1..0> 00 Disable Transmitter
- *
- * 0000 0100 0000 0000 = 0x0400
- */
-
- RegValue = 0x0400;
-
- switch ( info->params.encoding ) {
- case HDLC_ENCODING_NRZB: RegValue |= BIT13; break;
- case HDLC_ENCODING_NRZI_MARK: RegValue |= BIT14; break;
- case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT14 + BIT13; break;
- case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT15; break;
- case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT15 + BIT13; break;
- case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14; break;
- case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14 + BIT13; break;
- }
-
- if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_16_CCITT )
- RegValue |= BIT9 + BIT8;
- else if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_32_CCITT )
- RegValue |= ( BIT12 | BIT10 | BIT9 | BIT8);
-
- usc_OutReg( info, TMR, RegValue );
-
- usc_set_txidle( info );
-
-
- usc_TCmd( info, TCmd_SelectTicrdma_level );
-
- /* Transmit Interrupt Control Register (TICR)
- *
- * <15..8> ? Transmit FIFO DMA Level
- * <7> 0 Present IA (Interrupt Arm)
- * <6> 0 Idle Sent IA
- * <5> 1 Abort Sent IA
- * <4> 1 EOF/EOM Sent IA
- * <3> 0 CRC Sent IA
- * <2> 1 1 = Wait for SW Trigger to Start Frame
- * <1> 1 Tx Underrun IA
- * <0> 0 TC0 constant on read back
- *
- * 0000 0000 0011 0110 = 0x0036
- */
-
- if ( info->bus_type == MGSL_BUS_TYPE_PCI )
- usc_OutReg( info, TICR, 0x0736 );
- else
- usc_OutReg( info, TICR, 0x1436 );
-
- usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
- usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
-
- /*
- ** Transmit Command/Status Register (TCSR)
- **
- ** <15..12> 0000 TCmd
- ** <11> 0/1 UnderWait
- ** <10..08> 000 TxIdle
- ** <7> x PreSent
- ** <6> x IdleSent
- ** <5> x AbortSent
- ** <4> x EOF/EOM Sent
- ** <3> x CRC Sent
- ** <2> x All Sent
- ** <1> x TxUnder
- ** <0> x TxEmpty
- **
- ** 0000 0000 0000 0000 = 0x0000
- */
- info->tcsr_value = 0;
-
- if ( !PreSL1660 )
- info->tcsr_value |= TCSR_UNDERWAIT;
-
- usc_OutReg( info, TCSR, info->tcsr_value );
-
- /* Clock mode Control Register (CMCR)
- *
- * <15..14> 00 counter 1 Source = Disabled
- * <13..12> 00 counter 0 Source = Disabled
- * <11..10> 11 BRG1 Input is TxC Pin
- * <9..8> 11 BRG0 Input is TxC Pin
- * <7..6> 01 DPLL Input is BRG1 Output
- * <5..3> XXX TxCLK comes from Port 0
- * <2..0> XXX RxCLK comes from Port 1
- *
- * 0000 1111 0111 0111 = 0x0f77
- */
-
- RegValue = 0x0f40;
-
- if ( info->params.flags & HDLC_FLAG_RXC_DPLL )
- RegValue |= 0x0003; /* RxCLK from DPLL */
- else if ( info->params.flags & HDLC_FLAG_RXC_BRG )
- RegValue |= 0x0004; /* RxCLK from BRG0 */
- else if ( info->params.flags & HDLC_FLAG_RXC_TXCPIN)
- RegValue |= 0x0006; /* RxCLK from TXC Input */
- else
- RegValue |= 0x0007; /* RxCLK from Port1 */
-
- if ( info->params.flags & HDLC_FLAG_TXC_DPLL )
- RegValue |= 0x0018; /* TxCLK from DPLL */
- else if ( info->params.flags & HDLC_FLAG_TXC_BRG )
- RegValue |= 0x0020; /* TxCLK from BRG0 */
- else if ( info->params.flags & HDLC_FLAG_TXC_RXCPIN)
- RegValue |= 0x0038; /* RxCLK from TXC Input */
- else
- RegValue |= 0x0030; /* TxCLK from Port0 */
-
- usc_OutReg( info, CMCR, RegValue );
-
-
- /* Hardware Configuration Register (HCR)
- *
- * <15..14> 00 CTR0 Divisor:00=32,01=16,10=8,11=4
- * <13> 0 CTR1DSel:0=CTR0Div determines CTR0Div
- * <12> 0 CVOK:0=report code violation in biphase
- * <11..10> 00 DPLL Divisor:00=32,01=16,10=8,11=4
- * <9..8> XX DPLL mode:00=disable,01=NRZ,10=Biphase,11=Biphase Level
- * <7..6> 00 reserved
- * <5> 0 BRG1 mode:0=continuous,1=single cycle
- * <4> X BRG1 Enable
- * <3..2> 00 reserved
- * <1> 0 BRG0 mode:0=continuous,1=single cycle
- * <0> 0 BRG0 Enable
- */
-
- RegValue = 0x0000;
-
- if ( info->params.flags & (HDLC_FLAG_RXC_DPLL + HDLC_FLAG_TXC_DPLL) ) {
- u32 XtalSpeed;
- u32 DpllDivisor;
- u16 Tc;
-
- /* DPLL is enabled. Use BRG1 to provide continuous reference clock */
- /* for DPLL. DPLL mode in HCR is dependent on the encoding used. */
-
- if ( info->bus_type == MGSL_BUS_TYPE_PCI )
- XtalSpeed = 11059200;
- else
- XtalSpeed = 14745600;
-
- if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) {
- DpllDivisor = 16;
- RegValue |= BIT10;
- }
- else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) {
- DpllDivisor = 8;
- RegValue |= BIT11;
- }
- else
- DpllDivisor = 32;
-
- /* Tc = (Xtal/Speed) - 1 */
- /* If twice the remainder of (Xtal/Speed) is greater than Speed */
- /* then rounding up gives a more precise time constant. Instead */
- /* of rounding up and then subtracting 1 we just don't subtract */
- /* the one in this case. */
-
- /*--------------------------------------------------
- * ejz: for DPLL mode, application should use the
- * same clock speed as the partner system, even
- * though clocking is derived from the input RxData.
- * In case the user uses a 0 for the clock speed,
- * default to 0xffffffff and don't try to divide by
- * zero
- *--------------------------------------------------*/
- if ( info->params.clock_speed )
- {
- Tc = (u16)((XtalSpeed/DpllDivisor)/info->params.clock_speed);
- if ( !((((XtalSpeed/DpllDivisor) % info->params.clock_speed) * 2)
- / info->params.clock_speed) )
- Tc--;
- }
- else
- Tc = -1;
-
-
- /* Write 16-bit Time Constant for BRG1 */
- usc_OutReg( info, TC1R, Tc );
-
- RegValue |= BIT4; /* enable BRG1 */
-
- switch ( info->params.encoding ) {
- case HDLC_ENCODING_NRZ:
- case HDLC_ENCODING_NRZB:
- case HDLC_ENCODING_NRZI_MARK:
- case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT8; break;
- case HDLC_ENCODING_BIPHASE_MARK:
- case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT9; break;
- case HDLC_ENCODING_BIPHASE_LEVEL:
- case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT9 + BIT8; break;
- }
- }
-
- usc_OutReg( info, HCR, RegValue );
-
-
- /* Channel Control/status Register (CCSR)
- *
- * <15> X RCC FIFO Overflow status (RO)
- * <14> X RCC FIFO Not Empty status (RO)
- * <13> 0 1 = Clear RCC FIFO (WO)
- * <12> X DPLL Sync (RW)
- * <11> X DPLL 2 Missed Clocks status (RO)
- * <10> X DPLL 1 Missed Clock status (RO)
- * <9..8> 00 DPLL Resync on rising and falling edges (RW)
- * <7> X SDLC Loop On status (RO)
- * <6> X SDLC Loop Send status (RO)
- * <5> 1 Bypass counters for TxClk and RxClk (RW)
- * <4..2> 000 Last Char of SDLC frame has 8 bits (RW)
- * <1..0> 00 reserved
- *
- * 0000 0000 0010 0000 = 0x0020
- */
-
- usc_OutReg( info, CCSR, 0x1020 );
-
-
- if ( info->params.flags & HDLC_FLAG_AUTO_CTS ) {
- usc_OutReg( info, SICR,
- (u16)(usc_InReg(info,SICR) | SICR_CTS_INACTIVE) );
- }
-
-
- /* enable Master Interrupt Enable bit (MIE) */
- usc_EnableMasterIrqBit( info );
-
- usc_ClearIrqPendingBits( info, RECEIVE_STATUS + RECEIVE_DATA +
- TRANSMIT_STATUS + TRANSMIT_DATA + MISC);
-
- /* arm RCC underflow interrupt */
- usc_OutReg(info, SICR, (u16)(usc_InReg(info,SICR) | BIT3));
- usc_EnableInterrupts(info, MISC);
-
- info->mbre_bit = 0;
- outw( 0, info->io_base ); /* clear Master Bus Enable (DCAR) */
- usc_DmaCmd( info, DmaCmd_ResetAllChannels ); /* disable both DMA channels */
- info->mbre_bit = BIT8;
- outw( BIT8, info->io_base ); /* set Master Bus Enable (DCAR) */
-
- if (info->bus_type == MGSL_BUS_TYPE_ISA) {
- /* Enable DMAEN (Port 7, Bit 14) */
- /* This connects the DMA request signal to the ISA bus */
- usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) & ~BIT14));
- }
-
- /* DMA Control Register (DCR)
- *
- * <15..14> 10 Priority mode = Alternating Tx/Rx
- * 01 Rx has priority
- * 00 Tx has priority
- *
- * <13> 1 Enable Priority Preempt per DCR<15..14>
- * (WARNING DCR<11..10> must be 00 when this is 1)
- * 0 Choose activate channel per DCR<11..10>
- *
- * <12> 0 Little Endian for Array/List
- * <11..10> 00 Both Channels can use each bus grant
- * <9..6> 0000 reserved
- * <5> 0 7 CLK - Minimum Bus Re-request Interval
- * <4> 0 1 = drive D/C and S/D pins
- * <3> 1 1 = Add one wait state to all DMA cycles.
- * <2> 0 1 = Strobe /UAS on every transfer.
- * <1..0> 11 Addr incrementing only affects LS24 bits
- *
- * 0110 0000 0000 1011 = 0x600b
- */
-
- if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
- /* PCI adapter does not need DMA wait state */
- usc_OutDmaReg( info, DCR, 0xa00b );
- }
- else
- usc_OutDmaReg( info, DCR, 0x800b );
-
-
- /* Receive DMA mode Register (RDMR)
- *
- * <15..14> 11 DMA mode = Linked List Buffer mode
- * <13> 1 RSBinA/L = store Rx status Block in Arrary/List entry
- * <12> 1 Clear count of List Entry after fetching
- * <11..10> 00 Address mode = Increment
- * <9> 1 Terminate Buffer on RxBound
- * <8> 0 Bus Width = 16bits
- * <7..0> ? status Bits (write as 0s)
- *
- * 1111 0010 0000 0000 = 0xf200
- */
-
- usc_OutDmaReg( info, RDMR, 0xf200 );
-
-
- /* Transmit DMA mode Register (TDMR)
- *
- * <15..14> 11 DMA mode = Linked List Buffer mode
- * <13> 1 TCBinA/L = fetch Tx Control Block from List entry
- * <12> 1 Clear count of List Entry after fetching
- * <11..10> 00 Address mode = Increment
- * <9> 1 Terminate Buffer on end of frame
- * <8> 0 Bus Width = 16bits
- * <7..0> ? status Bits (Read Only so write as 0)
- *
- * 1111 0010 0000 0000 = 0xf200
- */
-
- usc_OutDmaReg( info, TDMR, 0xf200 );
-
-
- /* DMA Interrupt Control Register (DICR)
- *
- * <15> 1 DMA Interrupt Enable
- * <14> 0 1 = Disable IEO from USC
- * <13> 0 1 = Don't provide vector during IntAck
- * <12> 1 1 = Include status in Vector
- * <10..2> 0 reserved, Must be 0s
- * <1> 0 1 = Rx DMA Interrupt Enabled
- * <0> 0 1 = Tx DMA Interrupt Enabled
- *
- * 1001 0000 0000 0000 = 0x9000
- */
-
- usc_OutDmaReg( info, DICR, 0x9000 );
-
- usc_InDmaReg( info, RDMR ); /* clear pending receive DMA IRQ bits */
- usc_InDmaReg( info, TDMR ); /* clear pending transmit DMA IRQ bits */
- usc_OutDmaReg( info, CDIR, 0x0303 ); /* clear IUS and Pending for Tx and Rx */
-
- /* Channel Control Register (CCR)
- *
- * <15..14> 10 Use 32-bit Tx Control Blocks (TCBs)
- * <13> 0 Trigger Tx on SW Command Disabled
- * <12> 0 Flag Preamble Disabled
- * <11..10> 00 Preamble Length
- * <9..8> 00 Preamble Pattern
- * <7..6> 10 Use 32-bit Rx status Blocks (RSBs)
- * <5> 0 Trigger Rx on SW Command Disabled
- * <4..0> 0 reserved
- *
- * 1000 0000 1000 0000 = 0x8080
- */
-
- RegValue = 0x8080;
-
- switch ( info->params.preamble_length ) {
- case HDLC_PREAMBLE_LENGTH_16BITS: RegValue |= BIT10; break;
- case HDLC_PREAMBLE_LENGTH_32BITS: RegValue |= BIT11; break;
- case HDLC_PREAMBLE_LENGTH_64BITS: RegValue |= BIT11 + BIT10; break;
- }
-
- switch ( info->params.preamble ) {
- case HDLC_PREAMBLE_PATTERN_FLAGS: RegValue |= BIT8 + BIT12; break;
- case HDLC_PREAMBLE_PATTERN_ONES: RegValue |= BIT8; break;
- case HDLC_PREAMBLE_PATTERN_10: RegValue |= BIT9; break;
- case HDLC_PREAMBLE_PATTERN_01: RegValue |= BIT9 + BIT8; break;
- }
-
- usc_OutReg( info, CCR, RegValue );
-
-
- /*
- * Burst/Dwell Control Register
- *
- * <15..8> 0x20 Maximum number of transfers per bus grant
- * <7..0> 0x00 Maximum number of clock cycles per bus grant
- */
-
- if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
- /* don't limit bus occupancy on PCI adapter */
- usc_OutDmaReg( info, BDCR, 0x0000 );
- }
- else
- usc_OutDmaReg( info, BDCR, 0x2000 );
-
- usc_stop_transmitter(info);
- usc_stop_receiver(info);
-
-} /* end of usc_set_sdlc_mode() */
-
-/* usc_enable_loopback()
- *
- * Set the 16C32 for internal loopback mode.
- * The TxCLK and RxCLK signals are generated from the BRG0 and
- * the TxD is looped back to the RxD internally.
- *
- * Arguments: info pointer to device instance data
- * enable 1 = enable loopback, 0 = disable
- * Return Value: None
- */
-static void usc_enable_loopback(struct mgsl_struct *info, int enable)
-{
- if (enable) {
- /* blank external TXD output */
- usc_OutReg(info,IOCR,usc_InReg(info,IOCR) | (BIT7+BIT6));
-
- /* Clock mode Control Register (CMCR)
- *
- * <15..14> 00 counter 1 Disabled
- * <13..12> 00 counter 0 Disabled
- * <11..10> 11 BRG1 Input is TxC Pin
- * <9..8> 11 BRG0 Input is TxC Pin
- * <7..6> 01 DPLL Input is BRG1 Output
- * <5..3> 100 TxCLK comes from BRG0
- * <2..0> 100 RxCLK comes from BRG0
- *
- * 0000 1111 0110 0100 = 0x0f64
- */
-
- usc_OutReg( info, CMCR, 0x0f64 );
-
- /* Write 16-bit Time Constant for BRG0 */
- /* use clock speed if available, otherwise use 8 for diagnostics */
- if (info->params.clock_speed) {
- if (info->bus_type == MGSL_BUS_TYPE_PCI)
- usc_OutReg(info, TC0R, (u16)((11059200/info->params.clock_speed)-1));
- else
- usc_OutReg(info, TC0R, (u16)((14745600/info->params.clock_speed)-1));
- } else
- usc_OutReg(info, TC0R, (u16)8);
-
- /* Hardware Configuration Register (HCR) Clear Bit 1, BRG0
- mode = Continuous Set Bit 0 to enable BRG0. */
- usc_OutReg( info, HCR, (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) );
-
- /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */
- usc_OutReg(info, IOCR, (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004));
-
- /* set Internal Data loopback mode */
- info->loopback_bits = 0x300;
- outw( 0x0300, info->io_base + CCAR );
- } else {
- /* enable external TXD output */
- usc_OutReg(info,IOCR,usc_InReg(info,IOCR) & ~(BIT7+BIT6));
-
- /* clear Internal Data loopback mode */
- info->loopback_bits = 0;
- outw( 0,info->io_base + CCAR );
- }
-
-} /* end of usc_enable_loopback() */
-
-/* usc_enable_aux_clock()
- *
- * Enabled the AUX clock output at the specified frequency.
- *
- * Arguments:
- *
- * info pointer to device extension
- * data_rate data rate of clock in bits per second
- * A data rate of 0 disables the AUX clock.
- *
- * Return Value: None
- */
-static void usc_enable_aux_clock( struct mgsl_struct *info, u32 data_rate )
-{
- u32 XtalSpeed;
- u16 Tc;
-
- if ( data_rate ) {
- if ( info->bus_type == MGSL_BUS_TYPE_PCI )
- XtalSpeed = 11059200;
- else
- XtalSpeed = 14745600;
-
-
- /* Tc = (Xtal/Speed) - 1 */
- /* If twice the remainder of (Xtal/Speed) is greater than Speed */
- /* then rounding up gives a more precise time constant. Instead */
- /* of rounding up and then subtracting 1 we just don't subtract */
- /* the one in this case. */
-
-
- Tc = (u16)(XtalSpeed/data_rate);
- if ( !(((XtalSpeed % data_rate) * 2) / data_rate) )
- Tc--;
-
- /* Write 16-bit Time Constant for BRG0 */
- usc_OutReg( info, TC0R, Tc );
-
- /*
- * Hardware Configuration Register (HCR)
- * Clear Bit 1, BRG0 mode = Continuous
- * Set Bit 0 to enable BRG0.
- */
-
- usc_OutReg( info, HCR, (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) );
-
- /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */
- usc_OutReg( info, IOCR, (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004) );
- } else {
- /* data rate == 0 so turn off BRG0 */
- usc_OutReg( info, HCR, (u16)(usc_InReg( info, HCR ) & ~BIT0) );
- }
-
-} /* end of usc_enable_aux_clock() */
-
-/*
- *
- * usc_process_rxoverrun_sync()
- *
- * This function processes a receive overrun by resetting the
- * receive DMA buffers and issuing a Purge Rx FIFO command
- * to allow the receiver to continue receiving.
- *
- * Arguments:
- *
- * info pointer to device extension
- *
- * Return Value: None
- */
-static void usc_process_rxoverrun_sync( struct mgsl_struct *info )
-{
- int start_index;
- int end_index;
- int frame_start_index;
- bool start_of_frame_found = false;
- bool end_of_frame_found = false;
- bool reprogram_dma = false;
-
- DMABUFFERENTRY *buffer_list = info->rx_buffer_list;
- u32 phys_addr;
-
- usc_DmaCmd( info, DmaCmd_PauseRxChannel );
- usc_RCmd( info, RCmd_EnterHuntmode );
- usc_RTCmd( info, RTCmd_PurgeRxFifo );
-
- /* CurrentRxBuffer points to the 1st buffer of the next */
- /* possibly available receive frame. */
-
- frame_start_index = start_index = end_index = info->current_rx_buffer;
-
- /* Search for an unfinished string of buffers. This means */
- /* that a receive frame started (at least one buffer with */
- /* count set to zero) but there is no terminiting buffer */
- /* (status set to non-zero). */
-
- while( !buffer_list[end_index].count )
- {
- /* Count field has been reset to zero by 16C32. */
- /* This buffer is currently in use. */
-
- if ( !start_of_frame_found )
- {
- start_of_frame_found = true;
- frame_start_index = end_index;
- end_of_frame_found = false;
- }
-
- if ( buffer_list[end_index].status )
- {
- /* Status field has been set by 16C32. */
- /* This is the last buffer of a received frame. */
-
- /* We want to leave the buffers for this frame intact. */
- /* Move on to next possible frame. */
-
- start_of_frame_found = false;
- end_of_frame_found = true;
- }
-
- /* advance to next buffer entry in linked list */
- end_index++;
- if ( end_index == info->rx_buffer_count )
- end_index = 0;
-
- if ( start_index == end_index )
- {
- /* The entire list has been searched with all Counts == 0 and */
- /* all Status == 0. The receive buffers are */
- /* completely screwed, reset all receive buffers! */
- mgsl_reset_rx_dma_buffers( info );
- frame_start_index = 0;
- start_of_frame_found = false;
- reprogram_dma = true;
- break;
- }
- }
-
- if ( start_of_frame_found && !end_of_frame_found )
- {
- /* There is an unfinished string of receive DMA buffers */
- /* as a result of the receiver overrun. */
-
- /* Reset the buffers for the unfinished frame */
- /* and reprogram the receive DMA controller to start */
- /* at the 1st buffer of unfinished frame. */
-
- start_index = frame_start_index;
-
- do
- {
- *((unsigned long *)&(info->rx_buffer_list[start_index++].count)) = DMABUFFERSIZE;
-
- /* Adjust index for wrap around. */
- if ( start_index == info->rx_buffer_count )
- start_index = 0;
-
- } while( start_index != end_index );
-
- reprogram_dma = true;
- }
-
- if ( reprogram_dma )
- {
- usc_UnlatchRxstatusBits(info,RXSTATUS_ALL);
- usc_ClearIrqPendingBits(info, RECEIVE_DATA|RECEIVE_STATUS);
- usc_UnlatchRxstatusBits(info, RECEIVE_DATA|RECEIVE_STATUS);
-
- usc_EnableReceiver(info,DISABLE_UNCONDITIONAL);
-
- /* This empties the receive FIFO and loads the RCC with RCLR */
- usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
-
- /* program 16C32 with physical address of 1st DMA buffer entry */
- phys_addr = info->rx_buffer_list[frame_start_index].phys_entry;
- usc_OutDmaReg( info, NRARL, (u16)phys_addr );
- usc_OutDmaReg( info, NRARU, (u16)(phys_addr >> 16) );
-
- usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
- usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS );
- usc_EnableInterrupts( info, RECEIVE_STATUS );
-
- /* 1. Arm End of Buffer (EOB) Receive DMA Interrupt (BIT2 of RDIAR) */
- /* 2. Enable Receive DMA Interrupts (BIT1 of DICR) */
-
- usc_OutDmaReg( info, RDIAR, BIT3 + BIT2 );
- usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT1) );
- usc_DmaCmd( info, DmaCmd_InitRxChannel );
- if ( info->params.flags & HDLC_FLAG_AUTO_DCD )
- usc_EnableReceiver(info,ENABLE_AUTO_DCD);
- else
- usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
- }
- else
- {
- /* This empties the receive FIFO and loads the RCC with RCLR */
- usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
- usc_RTCmd( info, RTCmd_PurgeRxFifo );
- }
-
-} /* end of usc_process_rxoverrun_sync() */
-
-/* usc_stop_receiver()
- *
- * Disable USC receiver
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void usc_stop_receiver( struct mgsl_struct *info )
-{
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):usc_stop_receiver(%s)\n",
- __FILE__,__LINE__, info->device_name );
-
- /* Disable receive DMA channel. */
- /* This also disables receive DMA channel interrupts */
- usc_DmaCmd( info, DmaCmd_ResetRxChannel );
-
- usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
- usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS );
- usc_DisableInterrupts( info, RECEIVE_DATA + RECEIVE_STATUS );
-
- usc_EnableReceiver(info,DISABLE_UNCONDITIONAL);
-
- /* This empties the receive FIFO and loads the RCC with RCLR */
- usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
- usc_RTCmd( info, RTCmd_PurgeRxFifo );
-
- info->rx_enabled = false;
- info->rx_overflow = false;
- info->rx_rcc_underrun = false;
-
-} /* end of stop_receiver() */
-
-/* usc_start_receiver()
- *
- * Enable the USC receiver
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void usc_start_receiver( struct mgsl_struct *info )
-{
- u32 phys_addr;
-
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):usc_start_receiver(%s)\n",
- __FILE__,__LINE__, info->device_name );
-
- mgsl_reset_rx_dma_buffers( info );
- usc_stop_receiver( info );
-
- usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
- usc_RTCmd( info, RTCmd_PurgeRxFifo );
-
- if ( info->params.mode == MGSL_MODE_HDLC ||
- info->params.mode == MGSL_MODE_RAW ) {
- /* DMA mode Transfers */
- /* Program the DMA controller. */
- /* Enable the DMA controller end of buffer interrupt. */
-
- /* program 16C32 with physical address of 1st DMA buffer entry */
- phys_addr = info->rx_buffer_list[0].phys_entry;
- usc_OutDmaReg( info, NRARL, (u16)phys_addr );
- usc_OutDmaReg( info, NRARU, (u16)(phys_addr >> 16) );
-
- usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
- usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS );
- usc_EnableInterrupts( info, RECEIVE_STATUS );
-
- /* 1. Arm End of Buffer (EOB) Receive DMA Interrupt (BIT2 of RDIAR) */
- /* 2. Enable Receive DMA Interrupts (BIT1 of DICR) */
-
- usc_OutDmaReg( info, RDIAR, BIT3 + BIT2 );
- usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT1) );
- usc_DmaCmd( info, DmaCmd_InitRxChannel );
- if ( info->params.flags & HDLC_FLAG_AUTO_DCD )
- usc_EnableReceiver(info,ENABLE_AUTO_DCD);
- else
- usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
- } else {
- usc_UnlatchRxstatusBits(info, RXSTATUS_ALL);
- usc_ClearIrqPendingBits(info, RECEIVE_DATA + RECEIVE_STATUS);
- usc_EnableInterrupts(info, RECEIVE_DATA);
-
- usc_RTCmd( info, RTCmd_PurgeRxFifo );
- usc_RCmd( info, RCmd_EnterHuntmode );
-
- usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
- }
-
- usc_OutReg( info, CCSR, 0x1020 );
-
- info->rx_enabled = true;
-
-} /* end of usc_start_receiver() */
-
-/* usc_start_transmitter()
- *
- * Enable the USC transmitter and send a transmit frame if
- * one is loaded in the DMA buffers.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void usc_start_transmitter( struct mgsl_struct *info )
-{
- u32 phys_addr;
- unsigned int FrameSize;
-
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):usc_start_transmitter(%s)\n",
- __FILE__,__LINE__, info->device_name );
-
- if ( info->xmit_cnt ) {
-
- /* If auto RTS enabled and RTS is inactive, then assert */
- /* RTS and set a flag indicating that the driver should */
- /* negate RTS when the transmission completes. */
-
- info->drop_rts_on_tx_done = false;
-
- if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) {
- usc_get_serial_signals( info );
- if ( !(info->serial_signals & SerialSignal_RTS) ) {
- info->serial_signals |= SerialSignal_RTS;
- usc_set_serial_signals( info );
- info->drop_rts_on_tx_done = true;
- }
- }
-
-
- if ( info->params.mode == MGSL_MODE_ASYNC ) {
- if ( !info->tx_active ) {
- usc_UnlatchTxstatusBits(info, TXSTATUS_ALL);
- usc_ClearIrqPendingBits(info, TRANSMIT_STATUS + TRANSMIT_DATA);
- usc_EnableInterrupts(info, TRANSMIT_DATA);
- usc_load_txfifo(info);
- }
- } else {
- /* Disable transmit DMA controller while programming. */
- usc_DmaCmd( info, DmaCmd_ResetTxChannel );
-
- /* Transmit DMA buffer is loaded, so program USC */
- /* to send the frame contained in the buffers. */
-
- FrameSize = info->tx_buffer_list[info->start_tx_dma_buffer].rcc;
-
- /* if operating in Raw sync mode, reset the rcc component
- * of the tx dma buffer entry, otherwise, the serial controller
- * will send a closing sync char after this count.
- */
- if ( info->params.mode == MGSL_MODE_RAW )
- info->tx_buffer_list[info->start_tx_dma_buffer].rcc = 0;
-
- /* Program the Transmit Character Length Register (TCLR) */
- /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */
- usc_OutReg( info, TCLR, (u16)FrameSize );
-
- usc_RTCmd( info, RTCmd_PurgeTxFifo );
-
- /* Program the address of the 1st DMA Buffer Entry in linked list */
- phys_addr = info->tx_buffer_list[info->start_tx_dma_buffer].phys_entry;
- usc_OutDmaReg( info, NTARL, (u16)phys_addr );
- usc_OutDmaReg( info, NTARU, (u16)(phys_addr >> 16) );
-
- usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
- usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
- usc_EnableInterrupts( info, TRANSMIT_STATUS );
-
- if ( info->params.mode == MGSL_MODE_RAW &&
- info->num_tx_dma_buffers > 1 ) {
- /* When running external sync mode, attempt to 'stream' transmit */
- /* by filling tx dma buffers as they become available. To do this */
- /* we need to enable Tx DMA EOB Status interrupts : */
- /* */
- /* 1. Arm End of Buffer (EOB) Transmit DMA Interrupt (BIT2 of TDIAR) */
- /* 2. Enable Transmit DMA Interrupts (BIT0 of DICR) */
-
- usc_OutDmaReg( info, TDIAR, BIT2|BIT3 );
- usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT0) );
- }
-
- /* Initialize Transmit DMA Channel */
- usc_DmaCmd( info, DmaCmd_InitTxChannel );
-
- usc_TCmd( info, TCmd_SendFrame );
-
- mod_timer(&info->tx_timer, jiffies +
- msecs_to_jiffies(5000));
- }
- info->tx_active = true;
- }
-
- if ( !info->tx_enabled ) {
- info->tx_enabled = true;
- if ( info->params.flags & HDLC_FLAG_AUTO_CTS )
- usc_EnableTransmitter(info,ENABLE_AUTO_CTS);
- else
- usc_EnableTransmitter(info,ENABLE_UNCONDITIONAL);
- }
-
-} /* end of usc_start_transmitter() */
-
-/* usc_stop_transmitter()
- *
- * Stops the transmitter and DMA
- *
- * Arguments: info pointer to device isntance data
- * Return Value: None
- */
-static void usc_stop_transmitter( struct mgsl_struct *info )
-{
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):usc_stop_transmitter(%s)\n",
- __FILE__,__LINE__, info->device_name );
-
- del_timer(&info->tx_timer);
-
- usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
- usc_ClearIrqPendingBits( info, TRANSMIT_STATUS + TRANSMIT_DATA );
- usc_DisableInterrupts( info, TRANSMIT_STATUS + TRANSMIT_DATA );
-
- usc_EnableTransmitter(info,DISABLE_UNCONDITIONAL);
- usc_DmaCmd( info, DmaCmd_ResetTxChannel );
- usc_RTCmd( info, RTCmd_PurgeTxFifo );
-
- info->tx_enabled = false;
- info->tx_active = false;
-
-} /* end of usc_stop_transmitter() */
-
-/* usc_load_txfifo()
- *
- * Fill the transmit FIFO until the FIFO is full or
- * there is no more data to load.
- *
- * Arguments: info pointer to device extension (instance data)
- * Return Value: None
- */
-static void usc_load_txfifo( struct mgsl_struct *info )
-{
- int Fifocount;
- u8 TwoBytes[2];
-
- if ( !info->xmit_cnt && !info->x_char )
- return;
-
- /* Select transmit FIFO status readback in TICR */
- usc_TCmd( info, TCmd_SelectTicrTxFifostatus );
-
- /* load the Transmit FIFO until FIFOs full or all data sent */
-
- while( (Fifocount = usc_InReg(info, TICR) >> 8) && info->xmit_cnt ) {
- /* there is more space in the transmit FIFO and */
- /* there is more data in transmit buffer */
-
- if ( (info->xmit_cnt > 1) && (Fifocount > 1) && !info->x_char ) {
- /* write a 16-bit word from transmit buffer to 16C32 */
-
- TwoBytes[0] = info->xmit_buf[info->xmit_tail++];
- info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
- TwoBytes[1] = info->xmit_buf[info->xmit_tail++];
- info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
-
- outw( *((u16 *)TwoBytes), info->io_base + DATAREG);
-
- info->xmit_cnt -= 2;
- info->icount.tx += 2;
- } else {
- /* only 1 byte left to transmit or 1 FIFO slot left */
-
- outw( (inw( info->io_base + CCAR) & 0x0780) | (TDR+LSBONLY),
- info->io_base + CCAR );
-
- if (info->x_char) {
- /* transmit pending high priority char */
- outw( info->x_char,info->io_base + CCAR );
- info->x_char = 0;
- } else {
- outw( info->xmit_buf[info->xmit_tail++],info->io_base + CCAR );
- info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
- info->xmit_cnt--;
- }
- info->icount.tx++;
- }
- }
-
-} /* end of usc_load_txfifo() */
-
-/* usc_reset()
- *
- * Reset the adapter to a known state and prepare it for further use.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void usc_reset( struct mgsl_struct *info )
-{
- if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
- int i;
- u32 readval;
-
- /* Set BIT30 of Misc Control Register */
- /* (Local Control Register 0x50) to force reset of USC. */
-
- volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50);
- u32 *LCR0BRDR = (u32 *)(info->lcr_base + 0x28);
-
- info->misc_ctrl_value |= BIT30;
- *MiscCtrl = info->misc_ctrl_value;
-
- /*
- * Force at least 170ns delay before clearing
- * reset bit. Each read from LCR takes at least
- * 30ns so 10 times for 300ns to be safe.
- */
- for(i=0;i<10;i++)
- readval = *MiscCtrl;
-
- info->misc_ctrl_value &= ~BIT30;
- *MiscCtrl = info->misc_ctrl_value;
-
- *LCR0BRDR = BUS_DESCRIPTOR(
- 1, // Write Strobe Hold (0-3)
- 2, // Write Strobe Delay (0-3)
- 2, // Read Strobe Delay (0-3)
- 0, // NWDD (Write data-data) (0-3)
- 4, // NWAD (Write Addr-data) (0-31)
- 0, // NXDA (Read/Write Data-Addr) (0-3)
- 0, // NRDD (Read Data-Data) (0-3)
- 5 // NRAD (Read Addr-Data) (0-31)
- );
- } else {
- /* do HW reset */
- outb( 0,info->io_base + 8 );
- }
-
- info->mbre_bit = 0;
- info->loopback_bits = 0;
- info->usc_idle_mode = 0;
-
- /*
- * Program the Bus Configuration Register (BCR)
- *
- * <15> 0 Don't use separate address
- * <14..6> 0 reserved
- * <5..4> 00 IAckmode = Default, don't care
- * <3> 1 Bus Request Totem Pole output
- * <2> 1 Use 16 Bit data bus
- * <1> 0 IRQ Totem Pole output
- * <0> 0 Don't Shift Right Addr
- *
- * 0000 0000 0000 1100 = 0x000c
- *
- * By writing to io_base + SDPIN the Wait/Ack pin is
- * programmed to work as a Wait pin.
- */
-
- outw( 0x000c,info->io_base + SDPIN );
-
-
- outw( 0,info->io_base );
- outw( 0,info->io_base + CCAR );
-
- /* select little endian byte ordering */
- usc_RTCmd( info, RTCmd_SelectLittleEndian );
-
-
- /* Port Control Register (PCR)
- *
- * <15..14> 11 Port 7 is Output (~DMAEN, Bit 14 : 0 = Enabled)
- * <13..12> 11 Port 6 is Output (~INTEN, Bit 12 : 0 = Enabled)
- * <11..10> 00 Port 5 is Input (No Connect, Don't Care)
- * <9..8> 00 Port 4 is Input (No Connect, Don't Care)
- * <7..6> 11 Port 3 is Output (~RTS, Bit 6 : 0 = Enabled )
- * <5..4> 11 Port 2 is Output (~DTR, Bit 4 : 0 = Enabled )
- * <3..2> 01 Port 1 is Input (Dedicated RxC)
- * <1..0> 01 Port 0 is Input (Dedicated TxC)
- *
- * 1111 0000 1111 0101 = 0xf0f5
- */
-
- usc_OutReg( info, PCR, 0xf0f5 );
-
-
- /*
- * Input/Output Control Register
- *
- * <15..14> 00 CTS is active low input
- * <13..12> 00 DCD is active low input
- * <11..10> 00 TxREQ pin is input (DSR)
- * <9..8> 00 RxREQ pin is input (RI)
- * <7..6> 00 TxD is output (Transmit Data)
- * <5..3> 000 TxC Pin in Input (14.7456MHz Clock)
- * <2..0> 100 RxC is Output (drive with BRG0)
- *
- * 0000 0000 0000 0100 = 0x0004
- */
-
- usc_OutReg( info, IOCR, 0x0004 );
-
-} /* end of usc_reset() */
-
-/* usc_set_async_mode()
- *
- * Program adapter for asynchronous communications.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void usc_set_async_mode( struct mgsl_struct *info )
-{
- u16 RegValue;
-
- /* disable interrupts while programming USC */
- usc_DisableMasterIrqBit( info );
-
- outw( 0, info->io_base ); /* clear Master Bus Enable (DCAR) */
- usc_DmaCmd( info, DmaCmd_ResetAllChannels ); /* disable both DMA channels */
-
- usc_loopback_frame( info );
-
- /* Channel mode Register (CMR)
- *
- * <15..14> 00 Tx Sub modes, 00 = 1 Stop Bit
- * <13..12> 00 00 = 16X Clock
- * <11..8> 0000 Transmitter mode = Asynchronous
- * <7..6> 00 reserved?
- * <5..4> 00 Rx Sub modes, 00 = 16X Clock
- * <3..0> 0000 Receiver mode = Asynchronous
- *
- * 0000 0000 0000 0000 = 0x0
- */
-
- RegValue = 0;
- if ( info->params.stop_bits != 1 )
- RegValue |= BIT14;
- usc_OutReg( info, CMR, RegValue );
-
-
- /* Receiver mode Register (RMR)
- *
- * <15..13> 000 encoding = None
- * <12..08> 00000 reserved (Sync Only)
- * <7..6> 00 Even parity
- * <5> 0 parity disabled
- * <4..2> 000 Receive Char Length = 8 bits
- * <1..0> 00 Disable Receiver
- *
- * 0000 0000 0000 0000 = 0x0
- */
-
- RegValue = 0;
-
- if ( info->params.data_bits != 8 )
- RegValue |= BIT4+BIT3+BIT2;
-
- if ( info->params.parity != ASYNC_PARITY_NONE ) {
- RegValue |= BIT5;
- if ( info->params.parity != ASYNC_PARITY_ODD )
- RegValue |= BIT6;
- }
-
- usc_OutReg( info, RMR, RegValue );
-
-
- /* Set IRQ trigger level */
-
- usc_RCmd( info, RCmd_SelectRicrIntLevel );
-
-
- /* Receive Interrupt Control Register (RICR)
- *
- * <15..8> ? RxFIFO IRQ Request Level
- *
- * Note: For async mode the receive FIFO level must be set
- * to 0 to avoid the situation where the FIFO contains fewer bytes
- * than the trigger level and no more data is expected.
- *
- * <7> 0 Exited Hunt IA (Interrupt Arm)
- * <6> 0 Idle Received IA
- * <5> 0 Break/Abort IA
- * <4> 0 Rx Bound IA
- * <3> 0 Queued status reflects oldest byte in FIFO
- * <2> 0 Abort/PE IA
- * <1> 0 Rx Overrun IA
- * <0> 0 Select TC0 value for readback
- *
- * 0000 0000 0100 0000 = 0x0000 + (FIFOLEVEL in MSB)
- */
-
- usc_OutReg( info, RICR, 0x0000 );
-
- usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
- usc_ClearIrqPendingBits( info, RECEIVE_STATUS );
-
-
- /* Transmit mode Register (TMR)
- *
- * <15..13> 000 encoding = None
- * <12..08> 00000 reserved (Sync Only)
- * <7..6> 00 Transmit parity Even
- * <5> 0 Transmit parity Disabled
- * <4..2> 000 Tx Char Length = 8 bits
- * <1..0> 00 Disable Transmitter
- *
- * 0000 0000 0000 0000 = 0x0
- */
-
- RegValue = 0;
-
- if ( info->params.data_bits != 8 )
- RegValue |= BIT4+BIT3+BIT2;
-
- if ( info->params.parity != ASYNC_PARITY_NONE ) {
- RegValue |= BIT5;
- if ( info->params.parity != ASYNC_PARITY_ODD )
- RegValue |= BIT6;
- }
-
- usc_OutReg( info, TMR, RegValue );
-
- usc_set_txidle( info );
-
-
- /* Set IRQ trigger level */
-
- usc_TCmd( info, TCmd_SelectTicrIntLevel );
-
-
- /* Transmit Interrupt Control Register (TICR)
- *
- * <15..8> ? Transmit FIFO IRQ Level
- * <7> 0 Present IA (Interrupt Arm)
- * <6> 1 Idle Sent IA
- * <5> 0 Abort Sent IA
- * <4> 0 EOF/EOM Sent IA
- * <3> 0 CRC Sent IA
- * <2> 0 1 = Wait for SW Trigger to Start Frame
- * <1> 0 Tx Underrun IA
- * <0> 0 TC0 constant on read back
- *
- * 0000 0000 0100 0000 = 0x0040
- */
-
- usc_OutReg( info, TICR, 0x1f40 );
-
- usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
- usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
-
- usc_enable_async_clock( info, info->params.data_rate );
-
-
- /* Channel Control/status Register (CCSR)
- *
- * <15> X RCC FIFO Overflow status (RO)
- * <14> X RCC FIFO Not Empty status (RO)
- * <13> 0 1 = Clear RCC FIFO (WO)
- * <12> X DPLL in Sync status (RO)
- * <11> X DPLL 2 Missed Clocks status (RO)
- * <10> X DPLL 1 Missed Clock status (RO)
- * <9..8> 00 DPLL Resync on rising and falling edges (RW)
- * <7> X SDLC Loop On status (RO)
- * <6> X SDLC Loop Send status (RO)
- * <5> 1 Bypass counters for TxClk and RxClk (RW)
- * <4..2> 000 Last Char of SDLC frame has 8 bits (RW)
- * <1..0> 00 reserved
- *
- * 0000 0000 0010 0000 = 0x0020
- */
-
- usc_OutReg( info, CCSR, 0x0020 );
-
- usc_DisableInterrupts( info, TRANSMIT_STATUS + TRANSMIT_DATA +
- RECEIVE_DATA + RECEIVE_STATUS );
-
- usc_ClearIrqPendingBits( info, TRANSMIT_STATUS + TRANSMIT_DATA +
- RECEIVE_DATA + RECEIVE_STATUS );
-
- usc_EnableMasterIrqBit( info );
-
- if (info->bus_type == MGSL_BUS_TYPE_ISA) {
- /* Enable INTEN (Port 6, Bit12) */
- /* This connects the IRQ request signal to the ISA bus */
- usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12));
- }
-
- if (info->params.loopback) {
- info->loopback_bits = 0x300;
- outw(0x0300, info->io_base + CCAR);
- }
-
-} /* end of usc_set_async_mode() */
-
-/* usc_loopback_frame()
- *
- * Loop back a small (2 byte) dummy SDLC frame.
- * Interrupts and DMA are NOT used. The purpose of this is to
- * clear any 'stale' status info left over from running in async mode.
- *
- * The 16C32 shows the strange behaviour of marking the 1st
- * received SDLC frame with a CRC error even when there is no
- * CRC error. To get around this a small dummy from of 2 bytes
- * is looped back when switching from async to sync mode.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void usc_loopback_frame( struct mgsl_struct *info )
-{
- int i;
- unsigned long oldmode = info->params.mode;
-
- info->params.mode = MGSL_MODE_HDLC;
-
- usc_DisableMasterIrqBit( info );
-
- usc_set_sdlc_mode( info );
- usc_enable_loopback( info, 1 );
-
- /* Write 16-bit Time Constant for BRG0 */
- usc_OutReg( info, TC0R, 0 );
-
- /* Channel Control Register (CCR)
- *
- * <15..14> 00 Don't use 32-bit Tx Control Blocks (TCBs)
- * <13> 0 Trigger Tx on SW Command Disabled
- * <12> 0 Flag Preamble Disabled
- * <11..10> 00 Preamble Length = 8-Bits
- * <9..8> 01 Preamble Pattern = flags
- * <7..6> 10 Don't use 32-bit Rx status Blocks (RSBs)
- * <5> 0 Trigger Rx on SW Command Disabled
- * <4..0> 0 reserved
- *
- * 0000 0001 0000 0000 = 0x0100
- */
-
- usc_OutReg( info, CCR, 0x0100 );
-
- /* SETUP RECEIVER */
- usc_RTCmd( info, RTCmd_PurgeRxFifo );
- usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
-
- /* SETUP TRANSMITTER */
- /* Program the Transmit Character Length Register (TCLR) */
- /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */
- usc_OutReg( info, TCLR, 2 );
- usc_RTCmd( info, RTCmd_PurgeTxFifo );
-
- /* unlatch Tx status bits, and start transmit channel. */
- usc_UnlatchTxstatusBits(info,TXSTATUS_ALL);
- outw(0,info->io_base + DATAREG);
-
- /* ENABLE TRANSMITTER */
- usc_TCmd( info, TCmd_SendFrame );
- usc_EnableTransmitter(info,ENABLE_UNCONDITIONAL);
-
- /* WAIT FOR RECEIVE COMPLETE */
- for (i=0 ; i<1000 ; i++)
- if (usc_InReg( info, RCSR ) & (BIT8 + BIT4 + BIT3 + BIT1))
- break;
-
- /* clear Internal Data loopback mode */
- usc_enable_loopback(info, 0);
-
- usc_EnableMasterIrqBit(info);
-
- info->params.mode = oldmode;
-
-} /* end of usc_loopback_frame() */
-
-/* usc_set_sync_mode() Programs the USC for SDLC communications.
- *
- * Arguments: info pointer to adapter info structure
- * Return Value: None
- */
-static void usc_set_sync_mode( struct mgsl_struct *info )
-{
- usc_loopback_frame( info );
- usc_set_sdlc_mode( info );
-
- if (info->bus_type == MGSL_BUS_TYPE_ISA) {
- /* Enable INTEN (Port 6, Bit12) */
- /* This connects the IRQ request signal to the ISA bus */
- usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12));
- }
-
- usc_enable_aux_clock(info, info->params.clock_speed);
-
- if (info->params.loopback)
- usc_enable_loopback(info,1);
-
-} /* end of mgsl_set_sync_mode() */
-
-/* usc_set_txidle() Set the HDLC idle mode for the transmitter.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void usc_set_txidle( struct mgsl_struct *info )
-{
- u16 usc_idle_mode = IDLEMODE_FLAGS;
-
- /* Map API idle mode to USC register bits */
-
- switch( info->idle_mode ){
- case HDLC_TXIDLE_FLAGS: usc_idle_mode = IDLEMODE_FLAGS; break;
- case HDLC_TXIDLE_ALT_ZEROS_ONES: usc_idle_mode = IDLEMODE_ALT_ONE_ZERO; break;
- case HDLC_TXIDLE_ZEROS: usc_idle_mode = IDLEMODE_ZERO; break;
- case HDLC_TXIDLE_ONES: usc_idle_mode = IDLEMODE_ONE; break;
- case HDLC_TXIDLE_ALT_MARK_SPACE: usc_idle_mode = IDLEMODE_ALT_MARK_SPACE; break;
- case HDLC_TXIDLE_SPACE: usc_idle_mode = IDLEMODE_SPACE; break;
- case HDLC_TXIDLE_MARK: usc_idle_mode = IDLEMODE_MARK; break;
- }
-
- info->usc_idle_mode = usc_idle_mode;
- //usc_OutReg(info, TCSR, usc_idle_mode);
- info->tcsr_value &= ~IDLEMODE_MASK; /* clear idle mode bits */
- info->tcsr_value += usc_idle_mode;
- usc_OutReg(info, TCSR, info->tcsr_value);
-
- /*
- * if SyncLink WAN adapter is running in external sync mode, the
- * transmitter has been set to Monosync in order to try to mimic
- * a true raw outbound bit stream. Monosync still sends an open/close
- * sync char at the start/end of a frame. Try to match those sync
- * patterns to the idle mode set here
- */
- if ( info->params.mode == MGSL_MODE_RAW ) {
- unsigned char syncpat = 0;
- switch( info->idle_mode ) {
- case HDLC_TXIDLE_FLAGS:
- syncpat = 0x7e;
- break;
- case HDLC_TXIDLE_ALT_ZEROS_ONES:
- syncpat = 0x55;
- break;
- case HDLC_TXIDLE_ZEROS:
- case HDLC_TXIDLE_SPACE:
- syncpat = 0x00;
- break;
- case HDLC_TXIDLE_ONES:
- case HDLC_TXIDLE_MARK:
- syncpat = 0xff;
- break;
- case HDLC_TXIDLE_ALT_MARK_SPACE:
- syncpat = 0xaa;
- break;
- }
-
- usc_SetTransmitSyncChars(info,syncpat,syncpat);
- }
-
-} /* end of usc_set_txidle() */
-
-/* usc_get_serial_signals()
- *
- * Query the adapter for the state of the V24 status (input) signals.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void usc_get_serial_signals( struct mgsl_struct *info )
-{
- u16 status;
-
- /* clear all serial signals except DTR and RTS */
- info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
-
- /* Read the Misc Interrupt status Register (MISR) to get */
- /* the V24 status signals. */
-
- status = usc_InReg( info, MISR );
-
- /* set serial signal bits to reflect MISR */
-
- if ( status & MISCSTATUS_CTS )
- info->serial_signals |= SerialSignal_CTS;
-
- if ( status & MISCSTATUS_DCD )
- info->serial_signals |= SerialSignal_DCD;
-
- if ( status & MISCSTATUS_RI )
- info->serial_signals |= SerialSignal_RI;
-
- if ( status & MISCSTATUS_DSR )
- info->serial_signals |= SerialSignal_DSR;
-
-} /* end of usc_get_serial_signals() */
-
-/* usc_set_serial_signals()
- *
- * Set the state of DTR and RTS based on contents of
- * serial_signals member of device extension.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void usc_set_serial_signals( struct mgsl_struct *info )
-{
- u16 Control;
- unsigned char V24Out = info->serial_signals;
-
- /* get the current value of the Port Control Register (PCR) */
-
- Control = usc_InReg( info, PCR );
-
- if ( V24Out & SerialSignal_RTS )
- Control &= ~(BIT6);
- else
- Control |= BIT6;
-
- if ( V24Out & SerialSignal_DTR )
- Control &= ~(BIT4);
- else
- Control |= BIT4;
-
- usc_OutReg( info, PCR, Control );
-
-} /* end of usc_set_serial_signals() */
-
-/* usc_enable_async_clock()
- *
- * Enable the async clock at the specified frequency.
- *
- * Arguments: info pointer to device instance data
- * data_rate data rate of clock in bps
- * 0 disables the AUX clock.
- * Return Value: None
- */
-static void usc_enable_async_clock( struct mgsl_struct *info, u32 data_rate )
-{
- if ( data_rate ) {
- /*
- * Clock mode Control Register (CMCR)
- *
- * <15..14> 00 counter 1 Disabled
- * <13..12> 00 counter 0 Disabled
- * <11..10> 11 BRG1 Input is TxC Pin
- * <9..8> 11 BRG0 Input is TxC Pin
- * <7..6> 01 DPLL Input is BRG1 Output
- * <5..3> 100 TxCLK comes from BRG0
- * <2..0> 100 RxCLK comes from BRG0
- *
- * 0000 1111 0110 0100 = 0x0f64
- */
-
- usc_OutReg( info, CMCR, 0x0f64 );
-
-
- /*
- * Write 16-bit Time Constant for BRG0
- * Time Constant = (ClkSpeed / data_rate) - 1
- * ClkSpeed = 921600 (ISA), 691200 (PCI)
- */
-
- if ( info->bus_type == MGSL_BUS_TYPE_PCI )
- usc_OutReg( info, TC0R, (u16)((691200/data_rate) - 1) );
- else
- usc_OutReg( info, TC0R, (u16)((921600/data_rate) - 1) );
-
-
- /*
- * Hardware Configuration Register (HCR)
- * Clear Bit 1, BRG0 mode = Continuous
- * Set Bit 0 to enable BRG0.
- */
-
- usc_OutReg( info, HCR,
- (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) );
-
-
- /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */
-
- usc_OutReg( info, IOCR,
- (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004) );
- } else {
- /* data rate == 0 so turn off BRG0 */
- usc_OutReg( info, HCR, (u16)(usc_InReg( info, HCR ) & ~BIT0) );
- }
-
-} /* end of usc_enable_async_clock() */
-
-/*
- * Buffer Structures:
- *
- * Normal memory access uses virtual addresses that can make discontiguous
- * physical memory pages appear to be contiguous in the virtual address
- * space (the processors memory mapping handles the conversions).
- *
- * DMA transfers require physically contiguous memory. This is because
- * the DMA system controller and DMA bus masters deal with memory using
- * only physical addresses.
- *
- * This causes a problem under Windows NT when large DMA buffers are
- * needed. Fragmentation of the nonpaged pool prevents allocations of
- * physically contiguous buffers larger than the PAGE_SIZE.
- *
- * However the 16C32 supports Bus Master Scatter/Gather DMA which
- * allows DMA transfers to physically discontiguous buffers. Information
- * about each data transfer buffer is contained in a memory structure
- * called a 'buffer entry'. A list of buffer entries is maintained
- * to track and control the use of the data transfer buffers.
- *
- * To support this strategy we will allocate sufficient PAGE_SIZE
- * contiguous memory buffers to allow for the total required buffer
- * space.
- *
- * The 16C32 accesses the list of buffer entries using Bus Master
- * DMA. Control information is read from the buffer entries by the
- * 16C32 to control data transfers. status information is written to
- * the buffer entries by the 16C32 to indicate the status of completed
- * transfers.
- *
- * The CPU writes control information to the buffer entries to control
- * the 16C32 and reads status information from the buffer entries to
- * determine information about received and transmitted frames.
- *
- * Because the CPU and 16C32 (adapter) both need simultaneous access
- * to the buffer entries, the buffer entry memory is allocated with
- * HalAllocateCommonBuffer(). This restricts the size of the buffer
- * entry list to PAGE_SIZE.
- *
- * The actual data buffers on the other hand will only be accessed
- * by the CPU or the adapter but not by both simultaneously. This allows
- * Scatter/Gather packet based DMA procedures for using physically
- * discontiguous pages.
- */
-
-/*
- * mgsl_reset_tx_dma_buffers()
- *
- * Set the count for all transmit buffers to 0 to indicate the
- * buffer is available for use and set the current buffer to the
- * first buffer. This effectively makes all buffers free and
- * discards any data in buffers.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void mgsl_reset_tx_dma_buffers( struct mgsl_struct *info )
-{
- unsigned int i;
-
- for ( i = 0; i < info->tx_buffer_count; i++ ) {
- *((unsigned long *)&(info->tx_buffer_list[i].count)) = 0;
- }
-
- info->current_tx_buffer = 0;
- info->start_tx_dma_buffer = 0;
- info->tx_dma_buffers_used = 0;
-
- info->get_tx_holding_index = 0;
- info->put_tx_holding_index = 0;
- info->tx_holding_count = 0;
-
-} /* end of mgsl_reset_tx_dma_buffers() */
-
-/*
- * num_free_tx_dma_buffers()
- *
- * returns the number of free tx dma buffers available
- *
- * Arguments: info pointer to device instance data
- * Return Value: number of free tx dma buffers
- */
-static int num_free_tx_dma_buffers(struct mgsl_struct *info)
-{
- return info->tx_buffer_count - info->tx_dma_buffers_used;
-}
-
-/*
- * mgsl_reset_rx_dma_buffers()
- *
- * Set the count for all receive buffers to DMABUFFERSIZE
- * and set the current buffer to the first buffer. This effectively
- * makes all buffers free and discards any data in buffers.
- *
- * Arguments: info pointer to device instance data
- * Return Value: None
- */
-static void mgsl_reset_rx_dma_buffers( struct mgsl_struct *info )
-{
- unsigned int i;
-
- for ( i = 0; i < info->rx_buffer_count; i++ ) {
- *((unsigned long *)&(info->rx_buffer_list[i].count)) = DMABUFFERSIZE;
-// info->rx_buffer_list[i].count = DMABUFFERSIZE;
-// info->rx_buffer_list[i].status = 0;
- }
-
- info->current_rx_buffer = 0;
-
-} /* end of mgsl_reset_rx_dma_buffers() */
-
-/*
- * mgsl_free_rx_frame_buffers()
- *
- * Free the receive buffers used by a received SDLC
- * frame such that the buffers can be reused.
- *
- * Arguments:
- *
- * info pointer to device instance data
- * StartIndex index of 1st receive buffer of frame
- * EndIndex index of last receive buffer of frame
- *
- * Return Value: None
- */
-static void mgsl_free_rx_frame_buffers( struct mgsl_struct *info, unsigned int StartIndex, unsigned int EndIndex )
-{
- bool Done = false;
- DMABUFFERENTRY *pBufEntry;
- unsigned int Index;
-
- /* Starting with 1st buffer entry of the frame clear the status */
- /* field and set the count field to DMA Buffer Size. */
-
- Index = StartIndex;
-
- while( !Done ) {
- pBufEntry = &(info->rx_buffer_list[Index]);
-
- if ( Index == EndIndex ) {
- /* This is the last buffer of the frame! */
- Done = true;
- }
-
- /* reset current buffer for reuse */
-// pBufEntry->status = 0;
-// pBufEntry->count = DMABUFFERSIZE;
- *((unsigned long *)&(pBufEntry->count)) = DMABUFFERSIZE;
-
- /* advance to next buffer entry in linked list */
- Index++;
- if ( Index == info->rx_buffer_count )
- Index = 0;
- }
-
- /* set current buffer to next buffer after last buffer of frame */
- info->current_rx_buffer = Index;
-
-} /* end of free_rx_frame_buffers() */
-
-/* mgsl_get_rx_frame()
- *
- * This function attempts to return a received SDLC frame from the
- * receive DMA buffers. Only frames received without errors are returned.
- *
- * Arguments: info pointer to device extension
- * Return Value: true if frame returned, otherwise false
- */
-static bool mgsl_get_rx_frame(struct mgsl_struct *info)
-{
- unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */
- unsigned short status;
- DMABUFFERENTRY *pBufEntry;
- unsigned int framesize = 0;
- bool ReturnCode = false;
- unsigned long flags;
- struct tty_struct *tty = info->port.tty;
- bool return_frame = false;
-
- /*
- * current_rx_buffer points to the 1st buffer of the next available
- * receive frame. To find the last buffer of the frame look for
- * a non-zero status field in the buffer entries. (The status
- * field is set by the 16C32 after completing a receive frame.
- */
-
- StartIndex = EndIndex = info->current_rx_buffer;
-
- while( !info->rx_buffer_list[EndIndex].status ) {
- /*
- * If the count field of the buffer entry is non-zero then
- * this buffer has not been used. (The 16C32 clears the count
- * field when it starts using the buffer.) If an unused buffer
- * is encountered then there are no frames available.
- */
-
- if ( info->rx_buffer_list[EndIndex].count )
- goto Cleanup;
-
- /* advance to next buffer entry in linked list */
- EndIndex++;
- if ( EndIndex == info->rx_buffer_count )
- EndIndex = 0;
-
- /* if entire list searched then no frame available */
- if ( EndIndex == StartIndex ) {
- /* If this occurs then something bad happened,
- * all buffers have been 'used' but none mark
- * the end of a frame. Reset buffers and receiver.
- */
-
- if ( info->rx_enabled ){
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_start_receiver(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- }
- goto Cleanup;
- }
- }
-
-
- /* check status of receive frame */
-
- status = info->rx_buffer_list[EndIndex].status;
-
- if ( status & (RXSTATUS_SHORT_FRAME + RXSTATUS_OVERRUN +
- RXSTATUS_CRC_ERROR + RXSTATUS_ABORT) ) {
- if ( status & RXSTATUS_SHORT_FRAME )
- info->icount.rxshort++;
- else if ( status & RXSTATUS_ABORT )
- info->icount.rxabort++;
- else if ( status & RXSTATUS_OVERRUN )
- info->icount.rxover++;
- else {
- info->icount.rxcrc++;
- if ( info->params.crc_type & HDLC_CRC_RETURN_EX )
- return_frame = true;
- }
- framesize = 0;
-#if SYNCLINK_GENERIC_HDLC
- {
- info->netdev->stats.rx_errors++;
- info->netdev->stats.rx_frame_errors++;
- }
-#endif
- } else
- return_frame = true;
-
- if ( return_frame ) {
- /* receive frame has no errors, get frame size.
- * The frame size is the starting value of the RCC (which was
- * set to 0xffff) minus the ending value of the RCC (decremented
- * once for each receive character) minus 2 for the 16-bit CRC.
- */
-
- framesize = RCLRVALUE - info->rx_buffer_list[EndIndex].rcc;
-
- /* adjust frame size for CRC if any */
- if ( info->params.crc_type == HDLC_CRC_16_CCITT )
- framesize -= 2;
- else if ( info->params.crc_type == HDLC_CRC_32_CCITT )
- framesize -= 4;
- }
-
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk("%s(%d):mgsl_get_rx_frame(%s) status=%04X size=%d\n",
- __FILE__,__LINE__,info->device_name,status,framesize);
-
- if ( debug_level >= DEBUG_LEVEL_DATA )
- mgsl_trace_block(info,info->rx_buffer_list[StartIndex].virt_addr,
- min_t(int, framesize, DMABUFFERSIZE),0);
-
- if (framesize) {
- if ( ( (info->params.crc_type & HDLC_CRC_RETURN_EX) &&
- ((framesize+1) > info->max_frame_size) ) ||
- (framesize > info->max_frame_size) )
- info->icount.rxlong++;
- else {
- /* copy dma buffer(s) to contiguous intermediate buffer */
- int copy_count = framesize;
- int index = StartIndex;
- unsigned char *ptmp = info->intermediate_rxbuffer;
-
- if ( !(status & RXSTATUS_CRC_ERROR))
- info->icount.rxok++;
-
- while(copy_count) {
- int partial_count;
- if ( copy_count > DMABUFFERSIZE )
- partial_count = DMABUFFERSIZE;
- else
- partial_count = copy_count;
-
- pBufEntry = &(info->rx_buffer_list[index]);
- memcpy( ptmp, pBufEntry->virt_addr, partial_count );
- ptmp += partial_count;
- copy_count -= partial_count;
-
- if ( ++index == info->rx_buffer_count )
- index = 0;
- }
-
- if ( info->params.crc_type & HDLC_CRC_RETURN_EX ) {
- ++framesize;
- *ptmp = (status & RXSTATUS_CRC_ERROR ?
- RX_CRC_ERROR :
- RX_OK);
-
- if ( debug_level >= DEBUG_LEVEL_DATA )
- printk("%s(%d):mgsl_get_rx_frame(%s) rx frame status=%d\n",
- __FILE__,__LINE__,info->device_name,
- *ptmp);
- }
-
-#if SYNCLINK_GENERIC_HDLC
- if (info->netcount)
- hdlcdev_rx(info,info->intermediate_rxbuffer,framesize);
- else
-#endif
- ldisc_receive_buf(tty, info->intermediate_rxbuffer, info->flag_buf, framesize);
- }
- }
- /* Free the buffers used by this frame. */
- mgsl_free_rx_frame_buffers( info, StartIndex, EndIndex );
-
- ReturnCode = true;
-
-Cleanup:
-
- if ( info->rx_enabled && info->rx_overflow ) {
- /* The receiver needs to restarted because of
- * a receive overflow (buffer or FIFO). If the
- * receive buffers are now empty, then restart receiver.
- */
-
- if ( !info->rx_buffer_list[EndIndex].status &&
- info->rx_buffer_list[EndIndex].count ) {
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_start_receiver(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- }
- }
-
- return ReturnCode;
-
-} /* end of mgsl_get_rx_frame() */
-
-/* mgsl_get_raw_rx_frame()
- *
- * This function attempts to return a received frame from the
- * receive DMA buffers when running in external loop mode. In this mode,
- * we will return at most one DMABUFFERSIZE frame to the application.
- * The USC receiver is triggering off of DCD going active to start a new
- * frame, and DCD going inactive to terminate the frame (similar to
- * processing a closing flag character).
- *
- * In this routine, we will return DMABUFFERSIZE "chunks" at a time.
- * If DCD goes inactive, the last Rx DMA Buffer will have a non-zero
- * status field and the RCC field will indicate the length of the
- * entire received frame. We take this RCC field and get the modulus
- * of RCC and DMABUFFERSIZE to determine if number of bytes in the
- * last Rx DMA buffer and return that last portion of the frame.
- *
- * Arguments: info pointer to device extension
- * Return Value: true if frame returned, otherwise false
- */
-static bool mgsl_get_raw_rx_frame(struct mgsl_struct *info)
-{
- unsigned int CurrentIndex, NextIndex;
- unsigned short status;
- DMABUFFERENTRY *pBufEntry;
- unsigned int framesize = 0;
- bool ReturnCode = false;
- unsigned long flags;
- struct tty_struct *tty = info->port.tty;
-
- /*
- * current_rx_buffer points to the 1st buffer of the next available
- * receive frame. The status field is set by the 16C32 after
- * completing a receive frame. If the status field of this buffer
- * is zero, either the USC is still filling this buffer or this
- * is one of a series of buffers making up a received frame.
- *
- * If the count field of this buffer is zero, the USC is either
- * using this buffer or has used this buffer. Look at the count
- * field of the next buffer. If that next buffer's count is
- * non-zero, the USC is still actively using the current buffer.
- * Otherwise, if the next buffer's count field is zero, the
- * current buffer is complete and the USC is using the next
- * buffer.
- */
- CurrentIndex = NextIndex = info->current_rx_buffer;
- ++NextIndex;
- if ( NextIndex == info->rx_buffer_count )
- NextIndex = 0;
-
- if ( info->rx_buffer_list[CurrentIndex].status != 0 ||
- (info->rx_buffer_list[CurrentIndex].count == 0 &&
- info->rx_buffer_list[NextIndex].count == 0)) {
- /*
- * Either the status field of this dma buffer is non-zero
- * (indicating the last buffer of a receive frame) or the next
- * buffer is marked as in use -- implying this buffer is complete
- * and an intermediate buffer for this received frame.
- */
-
- status = info->rx_buffer_list[CurrentIndex].status;
-
- if ( status & (RXSTATUS_SHORT_FRAME + RXSTATUS_OVERRUN +
- RXSTATUS_CRC_ERROR + RXSTATUS_ABORT) ) {
- if ( status & RXSTATUS_SHORT_FRAME )
- info->icount.rxshort++;
- else if ( status & RXSTATUS_ABORT )
- info->icount.rxabort++;
- else if ( status & RXSTATUS_OVERRUN )
- info->icount.rxover++;
- else
- info->icount.rxcrc++;
- framesize = 0;
- } else {
- /*
- * A receive frame is available, get frame size and status.
- *
- * The frame size is the starting value of the RCC (which was
- * set to 0xffff) minus the ending value of the RCC (decremented
- * once for each receive character) minus 2 or 4 for the 16-bit
- * or 32-bit CRC.
- *
- * If the status field is zero, this is an intermediate buffer.
- * It's size is 4K.
- *
- * If the DMA Buffer Entry's Status field is non-zero, the
- * receive operation completed normally (ie: DCD dropped). The
- * RCC field is valid and holds the received frame size.
- * It is possible that the RCC field will be zero on a DMA buffer
- * entry with a non-zero status. This can occur if the total
- * frame size (number of bytes between the time DCD goes active
- * to the time DCD goes inactive) exceeds 65535 bytes. In this
- * case the 16C32 has underrun on the RCC count and appears to
- * stop updating this counter to let us know the actual received
- * frame size. If this happens (non-zero status and zero RCC),
- * simply return the entire RxDMA Buffer
- */
- if ( status ) {
- /*
- * In the event that the final RxDMA Buffer is
- * terminated with a non-zero status and the RCC
- * field is zero, we interpret this as the RCC
- * having underflowed (received frame > 65535 bytes).
- *
- * Signal the event to the user by passing back
- * a status of RxStatus_CrcError returning the full
- * buffer and let the app figure out what data is
- * actually valid
- */
- if ( info->rx_buffer_list[CurrentIndex].rcc )
- framesize = RCLRVALUE - info->rx_buffer_list[CurrentIndex].rcc;
- else
- framesize = DMABUFFERSIZE;
- }
- else
- framesize = DMABUFFERSIZE;
- }
-
- if ( framesize > DMABUFFERSIZE ) {
- /*
- * if running in raw sync mode, ISR handler for
- * End Of Buffer events terminates all buffers at 4K.
- * If this frame size is said to be >4K, get the
- * actual number of bytes of the frame in this buffer.
- */
- framesize = framesize % DMABUFFERSIZE;
- }
-
-
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk("%s(%d):mgsl_get_raw_rx_frame(%s) status=%04X size=%d\n",
- __FILE__,__LINE__,info->device_name,status,framesize);
-
- if ( debug_level >= DEBUG_LEVEL_DATA )
- mgsl_trace_block(info,info->rx_buffer_list[CurrentIndex].virt_addr,
- min_t(int, framesize, DMABUFFERSIZE),0);
-
- if (framesize) {
- /* copy dma buffer(s) to contiguous intermediate buffer */
- /* NOTE: we never copy more than DMABUFFERSIZE bytes */
-
- pBufEntry = &(info->rx_buffer_list[CurrentIndex]);
- memcpy( info->intermediate_rxbuffer, pBufEntry->virt_addr, framesize);
- info->icount.rxok++;
-
- ldisc_receive_buf(tty, info->intermediate_rxbuffer, info->flag_buf, framesize);
- }
-
- /* Free the buffers used by this frame. */
- mgsl_free_rx_frame_buffers( info, CurrentIndex, CurrentIndex );
-
- ReturnCode = true;
- }
-
-
- if ( info->rx_enabled && info->rx_overflow ) {
- /* The receiver needs to restarted because of
- * a receive overflow (buffer or FIFO). If the
- * receive buffers are now empty, then restart receiver.
- */
-
- if ( !info->rx_buffer_list[CurrentIndex].status &&
- info->rx_buffer_list[CurrentIndex].count ) {
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_start_receiver(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- }
- }
-
- return ReturnCode;
-
-} /* end of mgsl_get_raw_rx_frame() */
-
-/* mgsl_load_tx_dma_buffer()
- *
- * Load the transmit DMA buffer with the specified data.
- *
- * Arguments:
- *
- * info pointer to device extension
- * Buffer pointer to buffer containing frame to load
- * BufferSize size in bytes of frame in Buffer
- *
- * Return Value: None
- */
-static void mgsl_load_tx_dma_buffer(struct mgsl_struct *info,
- const char *Buffer, unsigned int BufferSize)
-{
- unsigned short Copycount;
- unsigned int i = 0;
- DMABUFFERENTRY *pBufEntry;
-
- if ( debug_level >= DEBUG_LEVEL_DATA )
- mgsl_trace_block(info,Buffer, min_t(int, BufferSize, DMABUFFERSIZE), 1);
-
- if (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) {
- /* set CMR:13 to start transmit when
- * next GoAhead (abort) is received
- */
- info->cmr_value |= BIT13;
- }
-
- /* begin loading the frame in the next available tx dma
- * buffer, remember it's starting location for setting
- * up tx dma operation
- */
- i = info->current_tx_buffer;
- info->start_tx_dma_buffer = i;
-
- /* Setup the status and RCC (Frame Size) fields of the 1st */
- /* buffer entry in the transmit DMA buffer list. */
-
- info->tx_buffer_list[i].status = info->cmr_value & 0xf000;
- info->tx_buffer_list[i].rcc = BufferSize;
- info->tx_buffer_list[i].count = BufferSize;
-
- /* Copy frame data from 1st source buffer to the DMA buffers. */
- /* The frame data may span multiple DMA buffers. */
-
- while( BufferSize ){
- /* Get a pointer to next DMA buffer entry. */
- pBufEntry = &info->tx_buffer_list[i++];
-
- if ( i == info->tx_buffer_count )
- i=0;
-
- /* Calculate the number of bytes that can be copied from */
- /* the source buffer to this DMA buffer. */
- if ( BufferSize > DMABUFFERSIZE )
- Copycount = DMABUFFERSIZE;
- else
- Copycount = BufferSize;
-
- /* Actually copy data from source buffer to DMA buffer. */
- /* Also set the data count for this individual DMA buffer. */
- if ( info->bus_type == MGSL_BUS_TYPE_PCI )
- mgsl_load_pci_memory(pBufEntry->virt_addr, Buffer,Copycount);
- else
- memcpy(pBufEntry->virt_addr, Buffer, Copycount);
-
- pBufEntry->count = Copycount;
-
- /* Advance source pointer and reduce remaining data count. */
- Buffer += Copycount;
- BufferSize -= Copycount;
-
- ++info->tx_dma_buffers_used;
- }
-
- /* remember next available tx dma buffer */
- info->current_tx_buffer = i;
-
-} /* end of mgsl_load_tx_dma_buffer() */
-
-/*
- * mgsl_register_test()
- *
- * Performs a register test of the 16C32.
- *
- * Arguments: info pointer to device instance data
- * Return Value: true if test passed, otherwise false
- */
-static bool mgsl_register_test( struct mgsl_struct *info )
-{
- static unsigned short BitPatterns[] =
- { 0x0000, 0xffff, 0xaaaa, 0x5555, 0x1234, 0x6969, 0x9696, 0x0f0f };
- static unsigned int Patterncount = ARRAY_SIZE(BitPatterns);
- unsigned int i;
- bool rc = true;
- unsigned long flags;
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_reset(info);
-
- /* Verify the reset state of some registers. */
-
- if ( (usc_InReg( info, SICR ) != 0) ||
- (usc_InReg( info, IVR ) != 0) ||
- (usc_InDmaReg( info, DIVR ) != 0) ){
- rc = false;
- }
-
- if ( rc ){
- /* Write bit patterns to various registers but do it out of */
- /* sync, then read back and verify values. */
-
- for ( i = 0 ; i < Patterncount ; i++ ) {
- usc_OutReg( info, TC0R, BitPatterns[i] );
- usc_OutReg( info, TC1R, BitPatterns[(i+1)%Patterncount] );
- usc_OutReg( info, TCLR, BitPatterns[(i+2)%Patterncount] );
- usc_OutReg( info, RCLR, BitPatterns[(i+3)%Patterncount] );
- usc_OutReg( info, RSR, BitPatterns[(i+4)%Patterncount] );
- usc_OutDmaReg( info, TBCR, BitPatterns[(i+5)%Patterncount] );
-
- if ( (usc_InReg( info, TC0R ) != BitPatterns[i]) ||
- (usc_InReg( info, TC1R ) != BitPatterns[(i+1)%Patterncount]) ||
- (usc_InReg( info, TCLR ) != BitPatterns[(i+2)%Patterncount]) ||
- (usc_InReg( info, RCLR ) != BitPatterns[(i+3)%Patterncount]) ||
- (usc_InReg( info, RSR ) != BitPatterns[(i+4)%Patterncount]) ||
- (usc_InDmaReg( info, TBCR ) != BitPatterns[(i+5)%Patterncount]) ){
- rc = false;
- break;
- }
- }
- }
-
- usc_reset(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- return rc;
-
-} /* end of mgsl_register_test() */
-
-/* mgsl_irq_test() Perform interrupt test of the 16C32.
- *
- * Arguments: info pointer to device instance data
- * Return Value: true if test passed, otherwise false
- */
-static bool mgsl_irq_test( struct mgsl_struct *info )
-{
- unsigned long EndTime;
- unsigned long flags;
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_reset(info);
-
- /*
- * Setup 16C32 to interrupt on TxC pin (14MHz clock) transition.
- * The ISR sets irq_occurred to true.
- */
-
- info->irq_occurred = false;
-
- /* Enable INTEN gate for ISA adapter (Port 6, Bit12) */
- /* Enable INTEN (Port 6, Bit12) */
- /* This connects the IRQ request signal to the ISA bus */
- /* on the ISA adapter. This has no effect for the PCI adapter */
- usc_OutReg( info, PCR, (unsigned short)((usc_InReg(info, PCR) | BIT13) & ~BIT12) );
-
- usc_EnableMasterIrqBit(info);
- usc_EnableInterrupts(info, IO_PIN);
- usc_ClearIrqPendingBits(info, IO_PIN);
-
- usc_UnlatchIostatusBits(info, MISCSTATUS_TXC_LATCHED);
- usc_EnableStatusIrqs(info, SICR_TXC_ACTIVE + SICR_TXC_INACTIVE);
-
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- EndTime=100;
- while( EndTime-- && !info->irq_occurred ) {
- msleep_interruptible(10);
- }
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_reset(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- return info->irq_occurred;
-
-} /* end of mgsl_irq_test() */
-
-/* mgsl_dma_test()
- *
- * Perform a DMA test of the 16C32. A small frame is
- * transmitted via DMA from a transmit buffer to a receive buffer
- * using single buffer DMA mode.
- *
- * Arguments: info pointer to device instance data
- * Return Value: true if test passed, otherwise false
- */
-static bool mgsl_dma_test( struct mgsl_struct *info )
-{
- unsigned short FifoLevel;
- unsigned long phys_addr;
- unsigned int FrameSize;
- unsigned int i;
- char *TmpPtr;
- bool rc = true;
- unsigned short status=0;
- unsigned long EndTime;
- unsigned long flags;
- MGSL_PARAMS tmp_params;
-
- /* save current port options */
- memcpy(&tmp_params,&info->params,sizeof(MGSL_PARAMS));
- /* load default port options */
- memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
-
-#define TESTFRAMESIZE 40
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
-
- /* setup 16C32 for SDLC DMA transfer mode */
-
- usc_reset(info);
- usc_set_sdlc_mode(info);
- usc_enable_loopback(info,1);
-
- /* Reprogram the RDMR so that the 16C32 does NOT clear the count
- * field of the buffer entry after fetching buffer address. This
- * way we can detect a DMA failure for a DMA read (which should be
- * non-destructive to system memory) before we try and write to
- * memory (where a failure could corrupt system memory).
- */
-
- /* Receive DMA mode Register (RDMR)
- *
- * <15..14> 11 DMA mode = Linked List Buffer mode
- * <13> 1 RSBinA/L = store Rx status Block in List entry
- * <12> 0 1 = Clear count of List Entry after fetching
- * <11..10> 00 Address mode = Increment
- * <9> 1 Terminate Buffer on RxBound
- * <8> 0 Bus Width = 16bits
- * <7..0> ? status Bits (write as 0s)
- *
- * 1110 0010 0000 0000 = 0xe200
- */
-
- usc_OutDmaReg( info, RDMR, 0xe200 );
-
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
-
- /* SETUP TRANSMIT AND RECEIVE DMA BUFFERS */
-
- FrameSize = TESTFRAMESIZE;
-
- /* setup 1st transmit buffer entry: */
- /* with frame size and transmit control word */
-
- info->tx_buffer_list[0].count = FrameSize;
- info->tx_buffer_list[0].rcc = FrameSize;
- info->tx_buffer_list[0].status = 0x4000;
-
- /* build a transmit frame in 1st transmit DMA buffer */
-
- TmpPtr = info->tx_buffer_list[0].virt_addr;
- for (i = 0; i < FrameSize; i++ )
- *TmpPtr++ = i;
-
- /* setup 1st receive buffer entry: */
- /* clear status, set max receive buffer size */
-
- info->rx_buffer_list[0].status = 0;
- info->rx_buffer_list[0].count = FrameSize + 4;
-
- /* zero out the 1st receive buffer */
-
- memset( info->rx_buffer_list[0].virt_addr, 0, FrameSize + 4 );
-
- /* Set count field of next buffer entries to prevent */
- /* 16C32 from using buffers after the 1st one. */
-
- info->tx_buffer_list[1].count = 0;
- info->rx_buffer_list[1].count = 0;
-
-
- /***************************/
- /* Program 16C32 receiver. */
- /***************************/
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
-
- /* setup DMA transfers */
- usc_RTCmd( info, RTCmd_PurgeRxFifo );
-
- /* program 16C32 receiver with physical address of 1st DMA buffer entry */
- phys_addr = info->rx_buffer_list[0].phys_entry;
- usc_OutDmaReg( info, NRARL, (unsigned short)phys_addr );
- usc_OutDmaReg( info, NRARU, (unsigned short)(phys_addr >> 16) );
-
- /* Clear the Rx DMA status bits (read RDMR) and start channel */
- usc_InDmaReg( info, RDMR );
- usc_DmaCmd( info, DmaCmd_InitRxChannel );
-
- /* Enable Receiver (RMR <1..0> = 10) */
- usc_OutReg( info, RMR, (unsigned short)((usc_InReg(info, RMR) & 0xfffc) | 0x0002) );
-
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
-
- /*************************************************************/
- /* WAIT FOR RECEIVER TO DMA ALL PARAMETERS FROM BUFFER ENTRY */
- /*************************************************************/
-
- /* Wait 100ms for interrupt. */
- EndTime = jiffies + msecs_to_jiffies(100);
-
- for(;;) {
- if (time_after(jiffies, EndTime)) {
- rc = false;
- break;
- }
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- status = usc_InDmaReg( info, RDMR );
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- if ( !(status & BIT4) && (status & BIT5) ) {
- /* INITG (BIT 4) is inactive (no entry read in progress) AND */
- /* BUSY (BIT 5) is active (channel still active). */
- /* This means the buffer entry read has completed. */
- break;
- }
- }
-
-
- /******************************/
- /* Program 16C32 transmitter. */
- /******************************/
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
-
- /* Program the Transmit Character Length Register (TCLR) */
- /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */
-
- usc_OutReg( info, TCLR, (unsigned short)info->tx_buffer_list[0].count );
- usc_RTCmd( info, RTCmd_PurgeTxFifo );
-
- /* Program the address of the 1st DMA Buffer Entry in linked list */
-
- phys_addr = info->tx_buffer_list[0].phys_entry;
- usc_OutDmaReg( info, NTARL, (unsigned short)phys_addr );
- usc_OutDmaReg( info, NTARU, (unsigned short)(phys_addr >> 16) );
-
- /* unlatch Tx status bits, and start transmit channel. */
-
- usc_OutReg( info, TCSR, (unsigned short)(( usc_InReg(info, TCSR) & 0x0f00) | 0xfa) );
- usc_DmaCmd( info, DmaCmd_InitTxChannel );
-
- /* wait for DMA controller to fill transmit FIFO */
-
- usc_TCmd( info, TCmd_SelectTicrTxFifostatus );
-
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
-
- /**********************************/
- /* WAIT FOR TRANSMIT FIFO TO FILL */
- /**********************************/
-
- /* Wait 100ms */
- EndTime = jiffies + msecs_to_jiffies(100);
-
- for(;;) {
- if (time_after(jiffies, EndTime)) {
- rc = false;
- break;
- }
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- FifoLevel = usc_InReg(info, TICR) >> 8;
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- if ( FifoLevel < 16 )
- break;
- else
- if ( FrameSize < 32 ) {
- /* This frame is smaller than the entire transmit FIFO */
- /* so wait for the entire frame to be loaded. */
- if ( FifoLevel <= (32 - FrameSize) )
- break;
- }
- }
-
-
- if ( rc )
- {
- /* Enable 16C32 transmitter. */
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
-
- /* Transmit mode Register (TMR), <1..0> = 10, Enable Transmitter */
- usc_TCmd( info, TCmd_SendFrame );
- usc_OutReg( info, TMR, (unsigned short)((usc_InReg(info, TMR) & 0xfffc) | 0x0002) );
-
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
-
- /******************************/
- /* WAIT FOR TRANSMIT COMPLETE */
- /******************************/
-
- /* Wait 100ms */
- EndTime = jiffies + msecs_to_jiffies(100);
-
- /* While timer not expired wait for transmit complete */
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- status = usc_InReg( info, TCSR );
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- while ( !(status & (BIT6+BIT5+BIT4+BIT2+BIT1)) ) {
- if (time_after(jiffies, EndTime)) {
- rc = false;
- break;
- }
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- status = usc_InReg( info, TCSR );
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- }
- }
-
-
- if ( rc ){
- /* CHECK FOR TRANSMIT ERRORS */
- if ( status & (BIT5 + BIT1) )
- rc = false;
- }
-
- if ( rc ) {
- /* WAIT FOR RECEIVE COMPLETE */
-
- /* Wait 100ms */
- EndTime = jiffies + msecs_to_jiffies(100);
-
- /* Wait for 16C32 to write receive status to buffer entry. */
- status=info->rx_buffer_list[0].status;
- while ( status == 0 ) {
- if (time_after(jiffies, EndTime)) {
- rc = false;
- break;
- }
- status=info->rx_buffer_list[0].status;
- }
- }
-
-
- if ( rc ) {
- /* CHECK FOR RECEIVE ERRORS */
- status = info->rx_buffer_list[0].status;
-
- if ( status & (BIT8 + BIT3 + BIT1) ) {
- /* receive error has occurred */
- rc = false;
- } else {
- if ( memcmp( info->tx_buffer_list[0].virt_addr ,
- info->rx_buffer_list[0].virt_addr, FrameSize ) ){
- rc = false;
- }
- }
- }
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_reset( info );
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- /* restore current port options */
- memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
-
- return rc;
-
-} /* end of mgsl_dma_test() */
-
-/* mgsl_adapter_test()
- *
- * Perform the register, IRQ, and DMA tests for the 16C32.
- *
- * Arguments: info pointer to device instance data
- * Return Value: 0 if success, otherwise -ENODEV
- */
-static int mgsl_adapter_test( struct mgsl_struct *info )
-{
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):Testing device %s\n",
- __FILE__,__LINE__,info->device_name );
-
- if ( !mgsl_register_test( info ) ) {
- info->init_error = DiagStatus_AddressFailure;
- printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
- __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) );
- return -ENODEV;
- }
-
- if ( !mgsl_irq_test( info ) ) {
- info->init_error = DiagStatus_IrqFailure;
- printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
- __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
- return -ENODEV;
- }
-
- if ( !mgsl_dma_test( info ) ) {
- info->init_error = DiagStatus_DmaFailure;
- printk( "%s(%d):DMA test failure for device %s DMA=%d\n",
- __FILE__,__LINE__,info->device_name, (unsigned short)(info->dma_level) );
- return -ENODEV;
- }
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):device %s passed diagnostics\n",
- __FILE__,__LINE__,info->device_name );
-
- return 0;
-
-} /* end of mgsl_adapter_test() */
-
-/* mgsl_memory_test()
- *
- * Test the shared memory on a PCI adapter.
- *
- * Arguments: info pointer to device instance data
- * Return Value: true if test passed, otherwise false
- */
-static bool mgsl_memory_test( struct mgsl_struct *info )
-{
- static unsigned long BitPatterns[] =
- { 0x0, 0x55555555, 0xaaaaaaaa, 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
- unsigned long Patterncount = ARRAY_SIZE(BitPatterns);
- unsigned long i;
- unsigned long TestLimit = SHARED_MEM_ADDRESS_SIZE/sizeof(unsigned long);
- unsigned long * TestAddr;
-
- if ( info->bus_type != MGSL_BUS_TYPE_PCI )
- return true;
-
- TestAddr = (unsigned long *)info->memory_base;
-
- /* Test data lines with test pattern at one location. */
-
- for ( i = 0 ; i < Patterncount ; i++ ) {
- *TestAddr = BitPatterns[i];
- if ( *TestAddr != BitPatterns[i] )
- return false;
- }
-
- /* Test address lines with incrementing pattern over */
- /* entire address range. */
-
- for ( i = 0 ; i < TestLimit ; i++ ) {
- *TestAddr = i * 4;
- TestAddr++;
- }
-
- TestAddr = (unsigned long *)info->memory_base;
-
- for ( i = 0 ; i < TestLimit ; i++ ) {
- if ( *TestAddr != i * 4 )
- return false;
- TestAddr++;
- }
-
- memset( info->memory_base, 0, SHARED_MEM_ADDRESS_SIZE );
-
- return true;
-
-} /* End Of mgsl_memory_test() */
-
-
-/* mgsl_load_pci_memory()
- *
- * Load a large block of data into the PCI shared memory.
- * Use this instead of memcpy() or memmove() to move data
- * into the PCI shared memory.
- *
- * Notes:
- *
- * This function prevents the PCI9050 interface chip from hogging
- * the adapter local bus, which can starve the 16C32 by preventing
- * 16C32 bus master cycles.
- *
- * The PCI9050 documentation says that the 9050 will always release
- * control of the local bus after completing the current read
- * or write operation.
- *
- * It appears that as long as the PCI9050 write FIFO is full, the
- * PCI9050 treats all of the writes as a single burst transaction
- * and will not release the bus. This causes DMA latency problems
- * at high speeds when copying large data blocks to the shared
- * memory.
- *
- * This function in effect, breaks the a large shared memory write
- * into multiple transations by interleaving a shared memory read
- * which will flush the write FIFO and 'complete' the write
- * transation. This allows any pending DMA request to gain control
- * of the local bus in a timely fasion.
- *
- * Arguments:
- *
- * TargetPtr pointer to target address in PCI shared memory
- * SourcePtr pointer to source buffer for data
- * count count in bytes of data to copy
- *
- * Return Value: None
- */
-static void mgsl_load_pci_memory( char* TargetPtr, const char* SourcePtr,
- unsigned short count )
-{
- /* 16 32-bit writes @ 60ns each = 960ns max latency on local bus */
-#define PCI_LOAD_INTERVAL 64
-
- unsigned short Intervalcount = count / PCI_LOAD_INTERVAL;
- unsigned short Index;
- unsigned long Dummy;
-
- for ( Index = 0 ; Index < Intervalcount ; Index++ )
- {
- memcpy(TargetPtr, SourcePtr, PCI_LOAD_INTERVAL);
- Dummy = *((volatile unsigned long *)TargetPtr);
- TargetPtr += PCI_LOAD_INTERVAL;
- SourcePtr += PCI_LOAD_INTERVAL;
- }
-
- memcpy( TargetPtr, SourcePtr, count % PCI_LOAD_INTERVAL );
-
-} /* End Of mgsl_load_pci_memory() */
-
-static void mgsl_trace_block(struct mgsl_struct *info,const char* data, int count, int xmit)
-{
- int i;
- int linecount;
- if (xmit)
- printk("%s tx data:\n",info->device_name);
- else
- printk("%s rx data:\n",info->device_name);
-
- while(count) {
- if (count > 16)
- linecount = 16;
- else
- linecount = count;
-
- for(i=0;i<linecount;i++)
- printk("%02X ",(unsigned char)data[i]);
- for(;i<17;i++)
- printk(" ");
- for(i=0;i<linecount;i++) {
- if (data[i]>=040 && data[i]<=0176)
- printk("%c",data[i]);
- else
- printk(".");
- }
- printk("\n");
-
- data += linecount;
- count -= linecount;
- }
-} /* end of mgsl_trace_block() */
-
-/* mgsl_tx_timeout()
- *
- * called when HDLC frame times out
- * update stats and do tx completion processing
- *
- * Arguments: context pointer to device instance data
- * Return Value: None
- */
-static void mgsl_tx_timeout(unsigned long context)
-{
- struct mgsl_struct *info = (struct mgsl_struct*)context;
- unsigned long flags;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_tx_timeout(%s)\n",
- __FILE__,__LINE__,info->device_name);
- if(info->tx_active &&
- (info->params.mode == MGSL_MODE_HDLC ||
- info->params.mode == MGSL_MODE_RAW) ) {
- info->icount.txtimeout++;
- }
- spin_lock_irqsave(&info->irq_spinlock,flags);
- info->tx_active = false;
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-
- if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
- usc_loopmode_cancel_transmit( info );
-
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
-#if SYNCLINK_GENERIC_HDLC
- if (info->netcount)
- hdlcdev_tx_done(info);
- else
-#endif
- mgsl_bh_transmit(info);
-
-} /* end of mgsl_tx_timeout() */
-
-/* signal that there are no more frames to send, so that
- * line is 'released' by echoing RxD to TxD when current
- * transmission is complete (or immediately if no tx in progress).
- */
-static int mgsl_loopmode_send_done( struct mgsl_struct * info )
-{
- unsigned long flags;
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) {
- if (info->tx_active)
- info->loopmode_send_done_requested = true;
- else
- usc_loopmode_send_done(info);
- }
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- return 0;
-}
-
-/* release the line by echoing RxD to TxD
- * upon completion of a transmit frame
- */
-static void usc_loopmode_send_done( struct mgsl_struct * info )
-{
- info->loopmode_send_done_requested = false;
- /* clear CMR:13 to 0 to start echoing RxData to TxData */
- info->cmr_value &= ~BIT13;
- usc_OutReg(info, CMR, info->cmr_value);
-}
-
-/* abort a transmit in progress while in HDLC LoopMode
- */
-static void usc_loopmode_cancel_transmit( struct mgsl_struct * info )
-{
- /* reset tx dma channel and purge TxFifo */
- usc_RTCmd( info, RTCmd_PurgeTxFifo );
- usc_DmaCmd( info, DmaCmd_ResetTxChannel );
- usc_loopmode_send_done( info );
-}
-
-/* for HDLC/SDLC LoopMode, setting CMR:13 after the transmitter is enabled
- * is an Insert Into Loop action. Upon receipt of a GoAhead sequence (RxAbort)
- * we must clear CMR:13 to begin repeating TxData to RxData
- */
-static void usc_loopmode_insert_request( struct mgsl_struct * info )
-{
- info->loopmode_insert_requested = true;
-
- /* enable RxAbort irq. On next RxAbort, clear CMR:13 to
- * begin repeating TxData on RxData (complete insertion)
- */
- usc_OutReg( info, RICR,
- (usc_InReg( info, RICR ) | RXSTATUS_ABORT_RECEIVED ) );
-
- /* set CMR:13 to insert into loop on next GoAhead (RxAbort) */
- info->cmr_value |= BIT13;
- usc_OutReg(info, CMR, info->cmr_value);
-}
-
-/* return 1 if station is inserted into the loop, otherwise 0
- */
-static int usc_loopmode_active( struct mgsl_struct * info)
-{
- return usc_InReg( info, CCSR ) & BIT7 ? 1 : 0 ;
-}
-
-#if SYNCLINK_GENERIC_HDLC
-
-/**
- * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
- * set encoding and frame check sequence (FCS) options
- *
- * dev pointer to network device structure
- * encoding serial encoding setting
- * parity FCS setting
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
- unsigned short parity)
-{
- struct mgsl_struct *info = dev_to_port(dev);
- unsigned char new_encoding;
- unsigned short new_crctype;
-
- /* return error if TTY interface open */
- if (info->port.count)
- return -EBUSY;
-
- switch (encoding)
- {
- case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
- case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
- case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
- case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
- case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
- default: return -EINVAL;
- }
-
- switch (parity)
- {
- case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
- case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
- case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
- default: return -EINVAL;
- }
-
- info->params.encoding = new_encoding;
- info->params.crc_type = new_crctype;
-
- /* if network interface up, reprogram hardware */
- if (info->netcount)
- mgsl_program_hw(info);
-
- return 0;
-}
-
-/**
- * called by generic HDLC layer to send frame
- *
- * skb socket buffer containing HDLC frame
- * dev pointer to network device structure
- */
-static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct mgsl_struct *info = dev_to_port(dev);
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
-
- /* stop sending until this frame completes */
- netif_stop_queue(dev);
-
- /* copy data to device buffers */
- info->xmit_cnt = skb->len;
- mgsl_load_tx_dma_buffer(info, skb->data, skb->len);
-
- /* update network statistics */
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += skb->len;
-
- /* done with socket buffer, so free it */
- dev_kfree_skb(skb);
-
- /* save start time for transmit timeout detection */
- dev->trans_start = jiffies;
-
- /* start hardware transmitter if necessary */
- spin_lock_irqsave(&info->irq_spinlock,flags);
- if (!info->tx_active)
- usc_start_transmitter(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- return NETDEV_TX_OK;
-}
-
-/**
- * called by network layer when interface enabled
- * claim resources and initialize hardware
- *
- * dev pointer to network device structure
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_open(struct net_device *dev)
-{
- struct mgsl_struct *info = dev_to_port(dev);
- int rc;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
-
- /* generic HDLC layer open processing */
- if ((rc = hdlc_open(dev)))
- return rc;
-
- /* arbitrate between network and tty opens */
- spin_lock_irqsave(&info->netlock, flags);
- if (info->port.count != 0 || info->netcount != 0) {
- printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
- spin_unlock_irqrestore(&info->netlock, flags);
- return -EBUSY;
- }
- info->netcount=1;
- spin_unlock_irqrestore(&info->netlock, flags);
-
- /* claim resources and init adapter */
- if ((rc = startup(info)) != 0) {
- spin_lock_irqsave(&info->netlock, flags);
- info->netcount=0;
- spin_unlock_irqrestore(&info->netlock, flags);
- return rc;
- }
-
- /* assert DTR and RTS, apply hardware settings */
- info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
- mgsl_program_hw(info);
-
- /* enable network layer transmit */
- dev->trans_start = jiffies;
- netif_start_queue(dev);
-
- /* inform generic HDLC layer of current DCD status */
- spin_lock_irqsave(&info->irq_spinlock, flags);
- usc_get_serial_signals(info);
- spin_unlock_irqrestore(&info->irq_spinlock, flags);
- if (info->serial_signals & SerialSignal_DCD)
- netif_carrier_on(dev);
- else
- netif_carrier_off(dev);
- return 0;
-}
-
-/**
- * called by network layer when interface is disabled
- * shutdown hardware and release resources
- *
- * dev pointer to network device structure
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_close(struct net_device *dev)
-{
- struct mgsl_struct *info = dev_to_port(dev);
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
-
- netif_stop_queue(dev);
-
- /* shutdown adapter and release resources */
- shutdown(info);
-
- hdlc_close(dev);
-
- spin_lock_irqsave(&info->netlock, flags);
- info->netcount=0;
- spin_unlock_irqrestore(&info->netlock, flags);
-
- return 0;
-}
-
-/**
- * called by network layer to process IOCTL call to network device
- *
- * dev pointer to network device structure
- * ifr pointer to network interface request structure
- * cmd IOCTL command code
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
-{
- const size_t size = sizeof(sync_serial_settings);
- sync_serial_settings new_line;
- sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
- struct mgsl_struct *info = dev_to_port(dev);
- unsigned int flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
-
- /* return error if TTY interface open */
- if (info->port.count)
- return -EBUSY;
-
- if (cmd != SIOCWANDEV)
- return hdlc_ioctl(dev, ifr, cmd);
-
- switch(ifr->ifr_settings.type) {
- case IF_GET_IFACE: /* return current sync_serial_settings */
-
- ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
- if (ifr->ifr_settings.size < size) {
- ifr->ifr_settings.size = size; /* data size wanted */
- return -ENOBUFS;
- }
-
- flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
- HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
- HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
- HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
-
- switch (flags){
- case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
- case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
- case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
- case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
- default: new_line.clock_type = CLOCK_DEFAULT;
- }
-
- new_line.clock_rate = info->params.clock_speed;
- new_line.loopback = info->params.loopback ? 1:0;
-
- if (copy_to_user(line, &new_line, size))
- return -EFAULT;
- return 0;
-
- case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
-
- if(!capable(CAP_NET_ADMIN))
- return -EPERM;
- if (copy_from_user(&new_line, line, size))
- return -EFAULT;
-
- switch (new_line.clock_type)
- {
- case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
- case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
- case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
- case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
- case CLOCK_DEFAULT: flags = info->params.flags &
- (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
- HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
- HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
- HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
- default: return -EINVAL;
- }
-
- if (new_line.loopback != 0 && new_line.loopback != 1)
- return -EINVAL;
-
- info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
- HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
- HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
- HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
- info->params.flags |= flags;
-
- info->params.loopback = new_line.loopback;
-
- if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
- info->params.clock_speed = new_line.clock_rate;
- else
- info->params.clock_speed = 0;
-
- /* if network interface up, reprogram hardware */
- if (info->netcount)
- mgsl_program_hw(info);
- return 0;
-
- default:
- return hdlc_ioctl(dev, ifr, cmd);
- }
-}
-
-/**
- * called by network layer when transmit timeout is detected
- *
- * dev pointer to network device structure
- */
-static void hdlcdev_tx_timeout(struct net_device *dev)
-{
- struct mgsl_struct *info = dev_to_port(dev);
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("hdlcdev_tx_timeout(%s)\n",dev->name);
-
- dev->stats.tx_errors++;
- dev->stats.tx_aborted_errors++;
-
- spin_lock_irqsave(&info->irq_spinlock,flags);
- usc_stop_transmitter(info);
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
-
- netif_wake_queue(dev);
-}
-
-/**
- * called by device driver when transmit completes
- * reenable network layer transmit if stopped
- *
- * info pointer to device instance information
- */
-static void hdlcdev_tx_done(struct mgsl_struct *info)
-{
- if (netif_queue_stopped(info->netdev))
- netif_wake_queue(info->netdev);
-}
-
-/**
- * called by device driver when frame received
- * pass frame to network layer
- *
- * info pointer to device instance information
- * buf pointer to buffer contianing frame data
- * size count of data bytes in buf
- */
-static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size)
-{
- struct sk_buff *skb = dev_alloc_skb(size);
- struct net_device *dev = info->netdev;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("hdlcdev_rx(%s)\n", dev->name);
-
- if (skb == NULL) {
- printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n",
- dev->name);
- dev->stats.rx_dropped++;
- return;
- }
-
- memcpy(skb_put(skb, size), buf, size);
-
- skb->protocol = hdlc_type_trans(skb, dev);
-
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += size;
-
- netif_rx(skb);
-}
-
-static const struct net_device_ops hdlcdev_ops = {
- .ndo_open = hdlcdev_open,
- .ndo_stop = hdlcdev_close,
- .ndo_change_mtu = hdlc_change_mtu,
- .ndo_start_xmit = hdlc_start_xmit,
- .ndo_do_ioctl = hdlcdev_ioctl,
- .ndo_tx_timeout = hdlcdev_tx_timeout,
-};
-
-/**
- * called by device driver when adding device instance
- * do generic HDLC initialization
- *
- * info pointer to device instance information
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_init(struct mgsl_struct *info)
-{
- int rc;
- struct net_device *dev;
- hdlc_device *hdlc;
-
- /* allocate and initialize network and HDLC layer objects */
-
- if (!(dev = alloc_hdlcdev(info))) {
- printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
- return -ENOMEM;
- }
-
- /* for network layer reporting purposes only */
- dev->base_addr = info->io_base;
- dev->irq = info->irq_level;
- dev->dma = info->dma_level;
-
- /* network layer callbacks and settings */
- dev->netdev_ops = &hdlcdev_ops;
- dev->watchdog_timeo = 10 * HZ;
- dev->tx_queue_len = 50;
-
- /* generic HDLC layer callbacks and settings */
- hdlc = dev_to_hdlc(dev);
- hdlc->attach = hdlcdev_attach;
- hdlc->xmit = hdlcdev_xmit;
-
- /* register objects with HDLC layer */
- if ((rc = register_hdlc_device(dev))) {
- printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
- free_netdev(dev);
- return rc;
- }
-
- info->netdev = dev;
- return 0;
-}
-
-/**
- * called by device driver when removing device instance
- * do generic HDLC cleanup
- *
- * info pointer to device instance information
- */
-static void hdlcdev_exit(struct mgsl_struct *info)
-{
- unregister_hdlc_device(info->netdev);
- free_netdev(info->netdev);
- info->netdev = NULL;
-}
-
-#endif /* CONFIG_HDLC */
-
-
-static int __devinit synclink_init_one (struct pci_dev *dev,
- const struct pci_device_id *ent)
-{
- struct mgsl_struct *info;
-
- if (pci_enable_device(dev)) {
- printk("error enabling pci device %p\n", dev);
- return -EIO;
- }
-
- if (!(info = mgsl_allocate_device())) {
- printk("can't allocate device instance data.\n");
- return -EIO;
- }
-
- /* Copy user configuration info to device instance data */
-
- info->io_base = pci_resource_start(dev, 2);
- info->irq_level = dev->irq;
- info->phys_memory_base = pci_resource_start(dev, 3);
-
- /* Because veremap only works on page boundaries we must map
- * a larger area than is actually implemented for the LCR
- * memory range. We map a full page starting at the page boundary.
- */
- info->phys_lcr_base = pci_resource_start(dev, 0);
- info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1);
- info->phys_lcr_base &= ~(PAGE_SIZE-1);
-
- info->bus_type = MGSL_BUS_TYPE_PCI;
- info->io_addr_size = 8;
- info->irq_flags = IRQF_SHARED;
-
- if (dev->device == 0x0210) {
- /* Version 1 PCI9030 based universal PCI adapter */
- info->misc_ctrl_value = 0x007c4080;
- info->hw_version = 1;
- } else {
- /* Version 0 PCI9050 based 5V PCI adapter
- * A PCI9050 bug prevents reading LCR registers if
- * LCR base address bit 7 is set. Maintain shadow
- * value so we can write to LCR misc control reg.
- */
- info->misc_ctrl_value = 0x087e4546;
- info->hw_version = 0;
- }
-
- mgsl_add_device(info);
-
- return 0;
-}
-
-static void __devexit synclink_remove_one (struct pci_dev *dev)
-{
-}
-
+++ /dev/null
-/*
- * Device driver for Microgate SyncLink GT serial adapters.
- *
- * written by Paul Fulghum for Microgate Corporation
- * paulkf@microgate.com
- *
- * Microgate and SyncLink are trademarks of Microgate Corporation
- *
- * This code is released under the GNU General Public License (GPL)
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * DEBUG OUTPUT DEFINITIONS
- *
- * uncomment lines below to enable specific types of debug output
- *
- * DBGINFO information - most verbose output
- * DBGERR serious errors
- * DBGBH bottom half service routine debugging
- * DBGISR interrupt service routine debugging
- * DBGDATA output receive and transmit data
- * DBGTBUF output transmit DMA buffers and registers
- * DBGRBUF output receive DMA buffers and registers
- */
-
-#define DBGINFO(fmt) if (debug_level >= DEBUG_LEVEL_INFO) printk fmt
-#define DBGERR(fmt) if (debug_level >= DEBUG_LEVEL_ERROR) printk fmt
-#define DBGBH(fmt) if (debug_level >= DEBUG_LEVEL_BH) printk fmt
-#define DBGISR(fmt) if (debug_level >= DEBUG_LEVEL_ISR) printk fmt
-#define DBGDATA(info, buf, size, label) if (debug_level >= DEBUG_LEVEL_DATA) trace_block((info), (buf), (size), (label))
-/*#define DBGTBUF(info) dump_tbufs(info)*/
-/*#define DBGRBUF(info) dump_rbufs(info)*/
-
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/mm.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/netdevice.h>
-#include <linux/vmalloc.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/ioctl.h>
-#include <linux/termios.h>
-#include <linux/bitops.h>
-#include <linux/workqueue.h>
-#include <linux/hdlc.h>
-#include <linux/synclink.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/dma.h>
-#include <asm/types.h>
-#include <asm/uaccess.h>
-
-#if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_GT_MODULE))
-#define SYNCLINK_GENERIC_HDLC 1
-#else
-#define SYNCLINK_GENERIC_HDLC 0
-#endif
-
-/*
- * module identification
- */
-static char *driver_name = "SyncLink GT";
-static char *tty_driver_name = "synclink_gt";
-static char *tty_dev_prefix = "ttySLG";
-MODULE_LICENSE("GPL");
-#define MGSL_MAGIC 0x5401
-#define MAX_DEVICES 32
-
-static struct pci_device_id pci_table[] = {
- {PCI_VENDOR_ID_MICROGATE, SYNCLINK_GT_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
- {PCI_VENDOR_ID_MICROGATE, SYNCLINK_GT2_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
- {PCI_VENDOR_ID_MICROGATE, SYNCLINK_GT4_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
- {PCI_VENDOR_ID_MICROGATE, SYNCLINK_AC_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
- {0,}, /* terminate list */
-};
-MODULE_DEVICE_TABLE(pci, pci_table);
-
-static int init_one(struct pci_dev *dev,const struct pci_device_id *ent);
-static void remove_one(struct pci_dev *dev);
-static struct pci_driver pci_driver = {
- .name = "synclink_gt",
- .id_table = pci_table,
- .probe = init_one,
- .remove = __devexit_p(remove_one),
-};
-
-static bool pci_registered;
-
-/*
- * module configuration and status
- */
-static struct slgt_info *slgt_device_list;
-static int slgt_device_count;
-
-static int ttymajor;
-static int debug_level;
-static int maxframe[MAX_DEVICES];
-
-module_param(ttymajor, int, 0);
-module_param(debug_level, int, 0);
-module_param_array(maxframe, int, NULL, 0);
-
-MODULE_PARM_DESC(ttymajor, "TTY major device number override: 0=auto assigned");
-MODULE_PARM_DESC(debug_level, "Debug syslog output: 0=disabled, 1 to 5=increasing detail");
-MODULE_PARM_DESC(maxframe, "Maximum frame size used by device (4096 to 65535)");
-
-/*
- * tty support and callbacks
- */
-static struct tty_driver *serial_driver;
-
-static int open(struct tty_struct *tty, struct file * filp);
-static void close(struct tty_struct *tty, struct file * filp);
-static void hangup(struct tty_struct *tty);
-static void set_termios(struct tty_struct *tty, struct ktermios *old_termios);
-
-static int write(struct tty_struct *tty, const unsigned char *buf, int count);
-static int put_char(struct tty_struct *tty, unsigned char ch);
-static void send_xchar(struct tty_struct *tty, char ch);
-static void wait_until_sent(struct tty_struct *tty, int timeout);
-static int write_room(struct tty_struct *tty);
-static void flush_chars(struct tty_struct *tty);
-static void flush_buffer(struct tty_struct *tty);
-static void tx_hold(struct tty_struct *tty);
-static void tx_release(struct tty_struct *tty);
-
-static int ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg);
-static int chars_in_buffer(struct tty_struct *tty);
-static void throttle(struct tty_struct * tty);
-static void unthrottle(struct tty_struct * tty);
-static int set_break(struct tty_struct *tty, int break_state);
-
-/*
- * generic HDLC support and callbacks
- */
-#if SYNCLINK_GENERIC_HDLC
-#define dev_to_port(D) (dev_to_hdlc(D)->priv)
-static void hdlcdev_tx_done(struct slgt_info *info);
-static void hdlcdev_rx(struct slgt_info *info, char *buf, int size);
-static int hdlcdev_init(struct slgt_info *info);
-static void hdlcdev_exit(struct slgt_info *info);
-#endif
-
-
-/*
- * device specific structures, macros and functions
- */
-
-#define SLGT_MAX_PORTS 4
-#define SLGT_REG_SIZE 256
-
-/*
- * conditional wait facility
- */
-struct cond_wait {
- struct cond_wait *next;
- wait_queue_head_t q;
- wait_queue_t wait;
- unsigned int data;
-};
-static void init_cond_wait(struct cond_wait *w, unsigned int data);
-static void add_cond_wait(struct cond_wait **head, struct cond_wait *w);
-static void remove_cond_wait(struct cond_wait **head, struct cond_wait *w);
-static void flush_cond_wait(struct cond_wait **head);
-
-/*
- * DMA buffer descriptor and access macros
- */
-struct slgt_desc
-{
- __le16 count;
- __le16 status;
- __le32 pbuf; /* physical address of data buffer */
- __le32 next; /* physical address of next descriptor */
-
- /* driver book keeping */
- char *buf; /* virtual address of data buffer */
- unsigned int pdesc; /* physical address of this descriptor */
- dma_addr_t buf_dma_addr;
- unsigned short buf_count;
-};
-
-#define set_desc_buffer(a,b) (a).pbuf = cpu_to_le32((unsigned int)(b))
-#define set_desc_next(a,b) (a).next = cpu_to_le32((unsigned int)(b))
-#define set_desc_count(a,b)(a).count = cpu_to_le16((unsigned short)(b))
-#define set_desc_eof(a,b) (a).status = cpu_to_le16((b) ? (le16_to_cpu((a).status) | BIT0) : (le16_to_cpu((a).status) & ~BIT0))
-#define set_desc_status(a, b) (a).status = cpu_to_le16((unsigned short)(b))
-#define desc_count(a) (le16_to_cpu((a).count))
-#define desc_status(a) (le16_to_cpu((a).status))
-#define desc_complete(a) (le16_to_cpu((a).status) & BIT15)
-#define desc_eof(a) (le16_to_cpu((a).status) & BIT2)
-#define desc_crc_error(a) (le16_to_cpu((a).status) & BIT1)
-#define desc_abort(a) (le16_to_cpu((a).status) & BIT0)
-#define desc_residue(a) ((le16_to_cpu((a).status) & 0x38) >> 3)
-
-struct _input_signal_events {
- int ri_up;
- int ri_down;
- int dsr_up;
- int dsr_down;
- int dcd_up;
- int dcd_down;
- int cts_up;
- int cts_down;
-};
-
-/*
- * device instance data structure
- */
-struct slgt_info {
- void *if_ptr; /* General purpose pointer (used by SPPP) */
- struct tty_port port;
-
- struct slgt_info *next_device; /* device list link */
-
- int magic;
-
- char device_name[25];
- struct pci_dev *pdev;
-
- int port_count; /* count of ports on adapter */
- int adapter_num; /* adapter instance number */
- int port_num; /* port instance number */
-
- /* array of pointers to port contexts on this adapter */
- struct slgt_info *port_array[SLGT_MAX_PORTS];
-
- int line; /* tty line instance number */
-
- struct mgsl_icount icount;
-
- int timeout;
- int x_char; /* xon/xoff character */
- unsigned int read_status_mask;
- unsigned int ignore_status_mask;
-
- wait_queue_head_t status_event_wait_q;
- wait_queue_head_t event_wait_q;
- struct timer_list tx_timer;
- struct timer_list rx_timer;
-
- unsigned int gpio_present;
- struct cond_wait *gpio_wait_q;
-
- spinlock_t lock; /* spinlock for synchronizing with ISR */
-
- struct work_struct task;
- u32 pending_bh;
- bool bh_requested;
- bool bh_running;
-
- int isr_overflow;
- bool irq_requested; /* true if IRQ requested */
- bool irq_occurred; /* for diagnostics use */
-
- /* device configuration */
-
- unsigned int bus_type;
- unsigned int irq_level;
- unsigned long irq_flags;
-
- unsigned char __iomem * reg_addr; /* memory mapped registers address */
- u32 phys_reg_addr;
- bool reg_addr_requested;
-
- MGSL_PARAMS params; /* communications parameters */
- u32 idle_mode;
- u32 max_frame_size; /* as set by device config */
-
- unsigned int rbuf_fill_level;
- unsigned int rx_pio;
- unsigned int if_mode;
- unsigned int base_clock;
- unsigned int xsync;
- unsigned int xctrl;
-
- /* device status */
-
- bool rx_enabled;
- bool rx_restart;
-
- bool tx_enabled;
- bool tx_active;
-
- unsigned char signals; /* serial signal states */
- int init_error; /* initialization error */
-
- unsigned char *tx_buf;
- int tx_count;
-
- char flag_buf[MAX_ASYNC_BUFFER_SIZE];
- char char_buf[MAX_ASYNC_BUFFER_SIZE];
- bool drop_rts_on_tx_done;
- struct _input_signal_events input_signal_events;
-
- int dcd_chkcount; /* check counts to prevent */
- int cts_chkcount; /* too many IRQs if a signal */
- int dsr_chkcount; /* is floating */
- int ri_chkcount;
-
- char *bufs; /* virtual address of DMA buffer lists */
- dma_addr_t bufs_dma_addr; /* physical address of buffer descriptors */
-
- unsigned int rbuf_count;
- struct slgt_desc *rbufs;
- unsigned int rbuf_current;
- unsigned int rbuf_index;
- unsigned int rbuf_fill_index;
- unsigned short rbuf_fill_count;
-
- unsigned int tbuf_count;
- struct slgt_desc *tbufs;
- unsigned int tbuf_current;
- unsigned int tbuf_start;
-
- unsigned char *tmp_rbuf;
- unsigned int tmp_rbuf_count;
-
- /* SPPP/Cisco HDLC device parts */
-
- int netcount;
- spinlock_t netlock;
-#if SYNCLINK_GENERIC_HDLC
- struct net_device *netdev;
-#endif
-
-};
-
-static MGSL_PARAMS default_params = {
- .mode = MGSL_MODE_HDLC,
- .loopback = 0,
- .flags = HDLC_FLAG_UNDERRUN_ABORT15,
- .encoding = HDLC_ENCODING_NRZI_SPACE,
- .clock_speed = 0,
- .addr_filter = 0xff,
- .crc_type = HDLC_CRC_16_CCITT,
- .preamble_length = HDLC_PREAMBLE_LENGTH_8BITS,
- .preamble = HDLC_PREAMBLE_PATTERN_NONE,
- .data_rate = 9600,
- .data_bits = 8,
- .stop_bits = 1,
- .parity = ASYNC_PARITY_NONE
-};
-
-
-#define BH_RECEIVE 1
-#define BH_TRANSMIT 2
-#define BH_STATUS 4
-#define IO_PIN_SHUTDOWN_LIMIT 100
-
-#define DMABUFSIZE 256
-#define DESC_LIST_SIZE 4096
-
-#define MASK_PARITY BIT1
-#define MASK_FRAMING BIT0
-#define MASK_BREAK BIT14
-#define MASK_OVERRUN BIT4
-
-#define GSR 0x00 /* global status */
-#define JCR 0x04 /* JTAG control */
-#define IODR 0x08 /* GPIO direction */
-#define IOER 0x0c /* GPIO interrupt enable */
-#define IOVR 0x10 /* GPIO value */
-#define IOSR 0x14 /* GPIO interrupt status */
-#define TDR 0x80 /* tx data */
-#define RDR 0x80 /* rx data */
-#define TCR 0x82 /* tx control */
-#define TIR 0x84 /* tx idle */
-#define TPR 0x85 /* tx preamble */
-#define RCR 0x86 /* rx control */
-#define VCR 0x88 /* V.24 control */
-#define CCR 0x89 /* clock control */
-#define BDR 0x8a /* baud divisor */
-#define SCR 0x8c /* serial control */
-#define SSR 0x8e /* serial status */
-#define RDCSR 0x90 /* rx DMA control/status */
-#define TDCSR 0x94 /* tx DMA control/status */
-#define RDDAR 0x98 /* rx DMA descriptor address */
-#define TDDAR 0x9c /* tx DMA descriptor address */
-#define XSR 0x40 /* extended sync pattern */
-#define XCR 0x44 /* extended control */
-
-#define RXIDLE BIT14
-#define RXBREAK BIT14
-#define IRQ_TXDATA BIT13
-#define IRQ_TXIDLE BIT12
-#define IRQ_TXUNDER BIT11 /* HDLC */
-#define IRQ_RXDATA BIT10
-#define IRQ_RXIDLE BIT9 /* HDLC */
-#define IRQ_RXBREAK BIT9 /* async */
-#define IRQ_RXOVER BIT8
-#define IRQ_DSR BIT7
-#define IRQ_CTS BIT6
-#define IRQ_DCD BIT5
-#define IRQ_RI BIT4
-#define IRQ_ALL 0x3ff0
-#define IRQ_MASTER BIT0
-
-#define slgt_irq_on(info, mask) \
- wr_reg16((info), SCR, (unsigned short)(rd_reg16((info), SCR) | (mask)))
-#define slgt_irq_off(info, mask) \
- wr_reg16((info), SCR, (unsigned short)(rd_reg16((info), SCR) & ~(mask)))
-
-static __u8 rd_reg8(struct slgt_info *info, unsigned int addr);
-static void wr_reg8(struct slgt_info *info, unsigned int addr, __u8 value);
-static __u16 rd_reg16(struct slgt_info *info, unsigned int addr);
-static void wr_reg16(struct slgt_info *info, unsigned int addr, __u16 value);
-static __u32 rd_reg32(struct slgt_info *info, unsigned int addr);
-static void wr_reg32(struct slgt_info *info, unsigned int addr, __u32 value);
-
-static void msc_set_vcr(struct slgt_info *info);
-
-static int startup(struct slgt_info *info);
-static int block_til_ready(struct tty_struct *tty, struct file * filp,struct slgt_info *info);
-static void shutdown(struct slgt_info *info);
-static void program_hw(struct slgt_info *info);
-static void change_params(struct slgt_info *info);
-
-static int register_test(struct slgt_info *info);
-static int irq_test(struct slgt_info *info);
-static int loopback_test(struct slgt_info *info);
-static int adapter_test(struct slgt_info *info);
-
-static void reset_adapter(struct slgt_info *info);
-static void reset_port(struct slgt_info *info);
-static void async_mode(struct slgt_info *info);
-static void sync_mode(struct slgt_info *info);
-
-static void rx_stop(struct slgt_info *info);
-static void rx_start(struct slgt_info *info);
-static void reset_rbufs(struct slgt_info *info);
-static void free_rbufs(struct slgt_info *info, unsigned int first, unsigned int last);
-static void rdma_reset(struct slgt_info *info);
-static bool rx_get_frame(struct slgt_info *info);
-static bool rx_get_buf(struct slgt_info *info);
-
-static void tx_start(struct slgt_info *info);
-static void tx_stop(struct slgt_info *info);
-static void tx_set_idle(struct slgt_info *info);
-static unsigned int free_tbuf_count(struct slgt_info *info);
-static unsigned int tbuf_bytes(struct slgt_info *info);
-static void reset_tbufs(struct slgt_info *info);
-static void tdma_reset(struct slgt_info *info);
-static bool tx_load(struct slgt_info *info, const char *buf, unsigned int count);
-
-static void get_signals(struct slgt_info *info);
-static void set_signals(struct slgt_info *info);
-static void enable_loopback(struct slgt_info *info);
-static void set_rate(struct slgt_info *info, u32 data_rate);
-
-static int bh_action(struct slgt_info *info);
-static void bh_handler(struct work_struct *work);
-static void bh_transmit(struct slgt_info *info);
-static void isr_serial(struct slgt_info *info);
-static void isr_rdma(struct slgt_info *info);
-static void isr_txeom(struct slgt_info *info, unsigned short status);
-static void isr_tdma(struct slgt_info *info);
-
-static int alloc_dma_bufs(struct slgt_info *info);
-static void free_dma_bufs(struct slgt_info *info);
-static int alloc_desc(struct slgt_info *info);
-static void free_desc(struct slgt_info *info);
-static int alloc_bufs(struct slgt_info *info, struct slgt_desc *bufs, int count);
-static void free_bufs(struct slgt_info *info, struct slgt_desc *bufs, int count);
-
-static int alloc_tmp_rbuf(struct slgt_info *info);
-static void free_tmp_rbuf(struct slgt_info *info);
-
-static void tx_timeout(unsigned long context);
-static void rx_timeout(unsigned long context);
-
-/*
- * ioctl handlers
- */
-static int get_stats(struct slgt_info *info, struct mgsl_icount __user *user_icount);
-static int get_params(struct slgt_info *info, MGSL_PARAMS __user *params);
-static int set_params(struct slgt_info *info, MGSL_PARAMS __user *params);
-static int get_txidle(struct slgt_info *info, int __user *idle_mode);
-static int set_txidle(struct slgt_info *info, int idle_mode);
-static int tx_enable(struct slgt_info *info, int enable);
-static int tx_abort(struct slgt_info *info);
-static int rx_enable(struct slgt_info *info, int enable);
-static int modem_input_wait(struct slgt_info *info,int arg);
-static int wait_mgsl_event(struct slgt_info *info, int __user *mask_ptr);
-static int tiocmget(struct tty_struct *tty);
-static int tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear);
-static int set_break(struct tty_struct *tty, int break_state);
-static int get_interface(struct slgt_info *info, int __user *if_mode);
-static int set_interface(struct slgt_info *info, int if_mode);
-static int set_gpio(struct slgt_info *info, struct gpio_desc __user *gpio);
-static int get_gpio(struct slgt_info *info, struct gpio_desc __user *gpio);
-static int wait_gpio(struct slgt_info *info, struct gpio_desc __user *gpio);
-static int get_xsync(struct slgt_info *info, int __user *if_mode);
-static int set_xsync(struct slgt_info *info, int if_mode);
-static int get_xctrl(struct slgt_info *info, int __user *if_mode);
-static int set_xctrl(struct slgt_info *info, int if_mode);
-
-/*
- * driver functions
- */
-static void add_device(struct slgt_info *info);
-static void device_init(int adapter_num, struct pci_dev *pdev);
-static int claim_resources(struct slgt_info *info);
-static void release_resources(struct slgt_info *info);
-
-/*
- * DEBUG OUTPUT CODE
- */
-#ifndef DBGINFO
-#define DBGINFO(fmt)
-#endif
-#ifndef DBGERR
-#define DBGERR(fmt)
-#endif
-#ifndef DBGBH
-#define DBGBH(fmt)
-#endif
-#ifndef DBGISR
-#define DBGISR(fmt)
-#endif
-
-#ifdef DBGDATA
-static void trace_block(struct slgt_info *info, const char *data, int count, const char *label)
-{
- int i;
- int linecount;
- printk("%s %s data:\n",info->device_name, label);
- while(count) {
- linecount = (count > 16) ? 16 : count;
- for(i=0; i < linecount; i++)
- printk("%02X ",(unsigned char)data[i]);
- for(;i<17;i++)
- printk(" ");
- for(i=0;i<linecount;i++) {
- if (data[i]>=040 && data[i]<=0176)
- printk("%c",data[i]);
- else
- printk(".");
- }
- printk("\n");
- data += linecount;
- count -= linecount;
- }
-}
-#else
-#define DBGDATA(info, buf, size, label)
-#endif
-
-#ifdef DBGTBUF
-static void dump_tbufs(struct slgt_info *info)
-{
- int i;
- printk("tbuf_current=%d\n", info->tbuf_current);
- for (i=0 ; i < info->tbuf_count ; i++) {
- printk("%d: count=%04X status=%04X\n",
- i, le16_to_cpu(info->tbufs[i].count), le16_to_cpu(info->tbufs[i].status));
- }
-}
-#else
-#define DBGTBUF(info)
-#endif
-
-#ifdef DBGRBUF
-static void dump_rbufs(struct slgt_info *info)
-{
- int i;
- printk("rbuf_current=%d\n", info->rbuf_current);
- for (i=0 ; i < info->rbuf_count ; i++) {
- printk("%d: count=%04X status=%04X\n",
- i, le16_to_cpu(info->rbufs[i].count), le16_to_cpu(info->rbufs[i].status));
- }
-}
-#else
-#define DBGRBUF(info)
-#endif
-
-static inline int sanity_check(struct slgt_info *info, char *devname, const char *name)
-{
-#ifdef SANITY_CHECK
- if (!info) {
- printk("null struct slgt_info for (%s) in %s\n", devname, name);
- return 1;
- }
- if (info->magic != MGSL_MAGIC) {
- printk("bad magic number struct slgt_info (%s) in %s\n", devname, name);
- return 1;
- }
-#else
- if (!info)
- return 1;
-#endif
- return 0;
-}
-
-/**
- * line discipline callback wrappers
- *
- * The wrappers maintain line discipline references
- * while calling into the line discipline.
- *
- * ldisc_receive_buf - pass receive data to line discipline
- */
-static void ldisc_receive_buf(struct tty_struct *tty,
- const __u8 *data, char *flags, int count)
-{
- struct tty_ldisc *ld;
- if (!tty)
- return;
- ld = tty_ldisc_ref(tty);
- if (ld) {
- if (ld->ops->receive_buf)
- ld->ops->receive_buf(tty, data, flags, count);
- tty_ldisc_deref(ld);
- }
-}
-
-/* tty callbacks */
-
-static int open(struct tty_struct *tty, struct file *filp)
-{
- struct slgt_info *info;
- int retval, line;
- unsigned long flags;
-
- line = tty->index;
- if ((line < 0) || (line >= slgt_device_count)) {
- DBGERR(("%s: open with invalid line #%d.\n", driver_name, line));
- return -ENODEV;
- }
-
- info = slgt_device_list;
- while(info && info->line != line)
- info = info->next_device;
- if (sanity_check(info, tty->name, "open"))
- return -ENODEV;
- if (info->init_error) {
- DBGERR(("%s init error=%d\n", info->device_name, info->init_error));
- return -ENODEV;
- }
-
- tty->driver_data = info;
- info->port.tty = tty;
-
- DBGINFO(("%s open, old ref count = %d\n", info->device_name, info->port.count));
-
- /* If port is closing, signal caller to try again */
- if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
- if (info->port.flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->port.close_wait);
- retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS);
- goto cleanup;
- }
-
- mutex_lock(&info->port.mutex);
- info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
- spin_lock_irqsave(&info->netlock, flags);
- if (info->netcount) {
- retval = -EBUSY;
- spin_unlock_irqrestore(&info->netlock, flags);
- mutex_unlock(&info->port.mutex);
- goto cleanup;
- }
- info->port.count++;
- spin_unlock_irqrestore(&info->netlock, flags);
-
- if (info->port.count == 1) {
- /* 1st open on this device, init hardware */
- retval = startup(info);
- if (retval < 0) {
- mutex_unlock(&info->port.mutex);
- goto cleanup;
- }
- }
- mutex_unlock(&info->port.mutex);
- retval = block_til_ready(tty, filp, info);
- if (retval) {
- DBGINFO(("%s block_til_ready rc=%d\n", info->device_name, retval));
- goto cleanup;
- }
-
- retval = 0;
-
-cleanup:
- if (retval) {
- if (tty->count == 1)
- info->port.tty = NULL; /* tty layer will release tty struct */
- if(info->port.count)
- info->port.count--;
- }
-
- DBGINFO(("%s open rc=%d\n", info->device_name, retval));
- return retval;
-}
-
-static void close(struct tty_struct *tty, struct file *filp)
-{
- struct slgt_info *info = tty->driver_data;
-
- if (sanity_check(info, tty->name, "close"))
- return;
- DBGINFO(("%s close entry, count=%d\n", info->device_name, info->port.count));
-
- if (tty_port_close_start(&info->port, tty, filp) == 0)
- goto cleanup;
-
- mutex_lock(&info->port.mutex);
- if (info->port.flags & ASYNC_INITIALIZED)
- wait_until_sent(tty, info->timeout);
- flush_buffer(tty);
- tty_ldisc_flush(tty);
-
- shutdown(info);
- mutex_unlock(&info->port.mutex);
-
- tty_port_close_end(&info->port, tty);
- info->port.tty = NULL;
-cleanup:
- DBGINFO(("%s close exit, count=%d\n", tty->driver->name, info->port.count));
-}
-
-static void hangup(struct tty_struct *tty)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned long flags;
-
- if (sanity_check(info, tty->name, "hangup"))
- return;
- DBGINFO(("%s hangup\n", info->device_name));
-
- flush_buffer(tty);
-
- mutex_lock(&info->port.mutex);
- shutdown(info);
-
- spin_lock_irqsave(&info->port.lock, flags);
- info->port.count = 0;
- info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
- info->port.tty = NULL;
- spin_unlock_irqrestore(&info->port.lock, flags);
- mutex_unlock(&info->port.mutex);
-
- wake_up_interruptible(&info->port.open_wait);
-}
-
-static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned long flags;
-
- DBGINFO(("%s set_termios\n", tty->driver->name));
-
- change_params(info);
-
- /* Handle transition to B0 status */
- if (old_termios->c_cflag & CBAUD &&
- !(tty->termios->c_cflag & CBAUD)) {
- info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
- spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-
- /* Handle transition away from B0 status */
- if (!(old_termios->c_cflag & CBAUD) &&
- tty->termios->c_cflag & CBAUD) {
- info->signals |= SerialSignal_DTR;
- if (!(tty->termios->c_cflag & CRTSCTS) ||
- !test_bit(TTY_THROTTLED, &tty->flags)) {
- info->signals |= SerialSignal_RTS;
- }
- spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-
- /* Handle turning off CRTSCTS */
- if (old_termios->c_cflag & CRTSCTS &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- tx_release(tty);
- }
-}
-
-static void update_tx_timer(struct slgt_info *info)
-{
- /*
- * use worst case speed of 1200bps to calculate transmit timeout
- * based on data in buffers (tbuf_bytes) and FIFO (128 bytes)
- */
- if (info->params.mode == MGSL_MODE_HDLC) {
- int timeout = (tbuf_bytes(info) * 7) + 1000;
- mod_timer(&info->tx_timer, jiffies + msecs_to_jiffies(timeout));
- }
-}
-
-static int write(struct tty_struct *tty,
- const unsigned char *buf, int count)
-{
- int ret = 0;
- struct slgt_info *info = tty->driver_data;
- unsigned long flags;
-
- if (sanity_check(info, tty->name, "write"))
- return -EIO;
-
- DBGINFO(("%s write count=%d\n", info->device_name, count));
-
- if (!info->tx_buf || (count > info->max_frame_size))
- return -EIO;
-
- if (!count || tty->stopped || tty->hw_stopped)
- return 0;
-
- spin_lock_irqsave(&info->lock, flags);
-
- if (info->tx_count) {
- /* send accumulated data from send_char() */
- if (!tx_load(info, info->tx_buf, info->tx_count))
- goto cleanup;
- info->tx_count = 0;
- }
-
- if (tx_load(info, buf, count))
- ret = count;
-
-cleanup:
- spin_unlock_irqrestore(&info->lock, flags);
- DBGINFO(("%s write rc=%d\n", info->device_name, ret));
- return ret;
-}
-
-static int put_char(struct tty_struct *tty, unsigned char ch)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned long flags;
- int ret = 0;
-
- if (sanity_check(info, tty->name, "put_char"))
- return 0;
- DBGINFO(("%s put_char(%d)\n", info->device_name, ch));
- if (!info->tx_buf)
- return 0;
- spin_lock_irqsave(&info->lock,flags);
- if (info->tx_count < info->max_frame_size) {
- info->tx_buf[info->tx_count++] = ch;
- ret = 1;
- }
- spin_unlock_irqrestore(&info->lock,flags);
- return ret;
-}
-
-static void send_xchar(struct tty_struct *tty, char ch)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned long flags;
-
- if (sanity_check(info, tty->name, "send_xchar"))
- return;
- DBGINFO(("%s send_xchar(%d)\n", info->device_name, ch));
- info->x_char = ch;
- if (ch) {
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_enabled)
- tx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-}
-
-static void wait_until_sent(struct tty_struct *tty, int timeout)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned long orig_jiffies, char_time;
-
- if (!info )
- return;
- if (sanity_check(info, tty->name, "wait_until_sent"))
- return;
- DBGINFO(("%s wait_until_sent entry\n", info->device_name));
- if (!(info->port.flags & ASYNC_INITIALIZED))
- goto exit;
-
- orig_jiffies = jiffies;
-
- /* Set check interval to 1/5 of estimated time to
- * send a character, and make it at least 1. The check
- * interval should also be less than the timeout.
- * Note: use tight timings here to satisfy the NIST-PCTS.
- */
-
- if (info->params.data_rate) {
- char_time = info->timeout/(32 * 5);
- if (!char_time)
- char_time++;
- } else
- char_time = 1;
-
- if (timeout)
- char_time = min_t(unsigned long, char_time, timeout);
-
- while (info->tx_active) {
- msleep_interruptible(jiffies_to_msecs(char_time));
- if (signal_pending(current))
- break;
- if (timeout && time_after(jiffies, orig_jiffies + timeout))
- break;
- }
-exit:
- DBGINFO(("%s wait_until_sent exit\n", info->device_name));
-}
-
-static int write_room(struct tty_struct *tty)
-{
- struct slgt_info *info = tty->driver_data;
- int ret;
-
- if (sanity_check(info, tty->name, "write_room"))
- return 0;
- ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE;
- DBGINFO(("%s write_room=%d\n", info->device_name, ret));
- return ret;
-}
-
-static void flush_chars(struct tty_struct *tty)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned long flags;
-
- if (sanity_check(info, tty->name, "flush_chars"))
- return;
- DBGINFO(("%s flush_chars entry tx_count=%d\n", info->device_name, info->tx_count));
-
- if (info->tx_count <= 0 || tty->stopped ||
- tty->hw_stopped || !info->tx_buf)
- return;
-
- DBGINFO(("%s flush_chars start transmit\n", info->device_name));
-
- spin_lock_irqsave(&info->lock,flags);
- if (info->tx_count && tx_load(info, info->tx_buf, info->tx_count))
- info->tx_count = 0;
- spin_unlock_irqrestore(&info->lock,flags);
-}
-
-static void flush_buffer(struct tty_struct *tty)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned long flags;
-
- if (sanity_check(info, tty->name, "flush_buffer"))
- return;
- DBGINFO(("%s flush_buffer\n", info->device_name));
-
- spin_lock_irqsave(&info->lock, flags);
- info->tx_count = 0;
- spin_unlock_irqrestore(&info->lock, flags);
-
- tty_wakeup(tty);
-}
-
-/*
- * throttle (stop) transmitter
- */
-static void tx_hold(struct tty_struct *tty)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned long flags;
-
- if (sanity_check(info, tty->name, "tx_hold"))
- return;
- DBGINFO(("%s tx_hold\n", info->device_name));
- spin_lock_irqsave(&info->lock,flags);
- if (info->tx_enabled && info->params.mode == MGSL_MODE_ASYNC)
- tx_stop(info);
- spin_unlock_irqrestore(&info->lock,flags);
-}
-
-/*
- * release (start) transmitter
- */
-static void tx_release(struct tty_struct *tty)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned long flags;
-
- if (sanity_check(info, tty->name, "tx_release"))
- return;
- DBGINFO(("%s tx_release\n", info->device_name));
- spin_lock_irqsave(&info->lock, flags);
- if (info->tx_count && tx_load(info, info->tx_buf, info->tx_count))
- info->tx_count = 0;
- spin_unlock_irqrestore(&info->lock, flags);
-}
-
-/*
- * Service an IOCTL request
- *
- * Arguments
- *
- * tty pointer to tty instance data
- * cmd IOCTL command code
- * arg command argument/context
- *
- * Return 0 if success, otherwise error code
- */
-static int ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct slgt_info *info = tty->driver_data;
- void __user *argp = (void __user *)arg;
- int ret;
-
- if (sanity_check(info, tty->name, "ioctl"))
- return -ENODEV;
- DBGINFO(("%s ioctl() cmd=%08X\n", info->device_name, cmd));
-
- if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != TIOCMIWAIT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
- }
-
- switch (cmd) {
- case MGSL_IOCWAITEVENT:
- return wait_mgsl_event(info, argp);
- case TIOCMIWAIT:
- return modem_input_wait(info,(int)arg);
- case MGSL_IOCSGPIO:
- return set_gpio(info, argp);
- case MGSL_IOCGGPIO:
- return get_gpio(info, argp);
- case MGSL_IOCWAITGPIO:
- return wait_gpio(info, argp);
- case MGSL_IOCGXSYNC:
- return get_xsync(info, argp);
- case MGSL_IOCSXSYNC:
- return set_xsync(info, (int)arg);
- case MGSL_IOCGXCTRL:
- return get_xctrl(info, argp);
- case MGSL_IOCSXCTRL:
- return set_xctrl(info, (int)arg);
- }
- mutex_lock(&info->port.mutex);
- switch (cmd) {
- case MGSL_IOCGPARAMS:
- ret = get_params(info, argp);
- break;
- case MGSL_IOCSPARAMS:
- ret = set_params(info, argp);
- break;
- case MGSL_IOCGTXIDLE:
- ret = get_txidle(info, argp);
- break;
- case MGSL_IOCSTXIDLE:
- ret = set_txidle(info, (int)arg);
- break;
- case MGSL_IOCTXENABLE:
- ret = tx_enable(info, (int)arg);
- break;
- case MGSL_IOCRXENABLE:
- ret = rx_enable(info, (int)arg);
- break;
- case MGSL_IOCTXABORT:
- ret = tx_abort(info);
- break;
- case MGSL_IOCGSTATS:
- ret = get_stats(info, argp);
- break;
- case MGSL_IOCGIF:
- ret = get_interface(info, argp);
- break;
- case MGSL_IOCSIF:
- ret = set_interface(info,(int)arg);
- break;
- default:
- ret = -ENOIOCTLCMD;
- }
- mutex_unlock(&info->port.mutex);
- return ret;
-}
-
-static int get_icount(struct tty_struct *tty,
- struct serial_icounter_struct *icount)
-
-{
- struct slgt_info *info = tty->driver_data;
- struct mgsl_icount cnow; /* kernel counter temps */
- unsigned long flags;
-
- spin_lock_irqsave(&info->lock,flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->lock,flags);
-
- icount->cts = cnow.cts;
- icount->dsr = cnow.dsr;
- icount->rng = cnow.rng;
- icount->dcd = cnow.dcd;
- icount->rx = cnow.rx;
- icount->tx = cnow.tx;
- icount->frame = cnow.frame;
- icount->overrun = cnow.overrun;
- icount->parity = cnow.parity;
- icount->brk = cnow.brk;
- icount->buf_overrun = cnow.buf_overrun;
-
- return 0;
-}
-
-/*
- * support for 32 bit ioctl calls on 64 bit systems
- */
-#ifdef CONFIG_COMPAT
-static long get_params32(struct slgt_info *info, struct MGSL_PARAMS32 __user *user_params)
-{
- struct MGSL_PARAMS32 tmp_params;
-
- DBGINFO(("%s get_params32\n", info->device_name));
- memset(&tmp_params, 0, sizeof(tmp_params));
- tmp_params.mode = (compat_ulong_t)info->params.mode;
- tmp_params.loopback = info->params.loopback;
- tmp_params.flags = info->params.flags;
- tmp_params.encoding = info->params.encoding;
- tmp_params.clock_speed = (compat_ulong_t)info->params.clock_speed;
- tmp_params.addr_filter = info->params.addr_filter;
- tmp_params.crc_type = info->params.crc_type;
- tmp_params.preamble_length = info->params.preamble_length;
- tmp_params.preamble = info->params.preamble;
- tmp_params.data_rate = (compat_ulong_t)info->params.data_rate;
- tmp_params.data_bits = info->params.data_bits;
- tmp_params.stop_bits = info->params.stop_bits;
- tmp_params.parity = info->params.parity;
- if (copy_to_user(user_params, &tmp_params, sizeof(struct MGSL_PARAMS32)))
- return -EFAULT;
- return 0;
-}
-
-static long set_params32(struct slgt_info *info, struct MGSL_PARAMS32 __user *new_params)
-{
- struct MGSL_PARAMS32 tmp_params;
-
- DBGINFO(("%s set_params32\n", info->device_name));
- if (copy_from_user(&tmp_params, new_params, sizeof(struct MGSL_PARAMS32)))
- return -EFAULT;
-
- spin_lock(&info->lock);
- if (tmp_params.mode == MGSL_MODE_BASE_CLOCK) {
- info->base_clock = tmp_params.clock_speed;
- } else {
- info->params.mode = tmp_params.mode;
- info->params.loopback = tmp_params.loopback;
- info->params.flags = tmp_params.flags;
- info->params.encoding = tmp_params.encoding;
- info->params.clock_speed = tmp_params.clock_speed;
- info->params.addr_filter = tmp_params.addr_filter;
- info->params.crc_type = tmp_params.crc_type;
- info->params.preamble_length = tmp_params.preamble_length;
- info->params.preamble = tmp_params.preamble;
- info->params.data_rate = tmp_params.data_rate;
- info->params.data_bits = tmp_params.data_bits;
- info->params.stop_bits = tmp_params.stop_bits;
- info->params.parity = tmp_params.parity;
- }
- spin_unlock(&info->lock);
-
- program_hw(info);
-
- return 0;
-}
-
-static long slgt_compat_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct slgt_info *info = tty->driver_data;
- int rc = -ENOIOCTLCMD;
-
- if (sanity_check(info, tty->name, "compat_ioctl"))
- return -ENODEV;
- DBGINFO(("%s compat_ioctl() cmd=%08X\n", info->device_name, cmd));
-
- switch (cmd) {
-
- case MGSL_IOCSPARAMS32:
- rc = set_params32(info, compat_ptr(arg));
- break;
-
- case MGSL_IOCGPARAMS32:
- rc = get_params32(info, compat_ptr(arg));
- break;
-
- case MGSL_IOCGPARAMS:
- case MGSL_IOCSPARAMS:
- case MGSL_IOCGTXIDLE:
- case MGSL_IOCGSTATS:
- case MGSL_IOCWAITEVENT:
- case MGSL_IOCGIF:
- case MGSL_IOCSGPIO:
- case MGSL_IOCGGPIO:
- case MGSL_IOCWAITGPIO:
- case MGSL_IOCGXSYNC:
- case MGSL_IOCGXCTRL:
- case MGSL_IOCSTXIDLE:
- case MGSL_IOCTXENABLE:
- case MGSL_IOCRXENABLE:
- case MGSL_IOCTXABORT:
- case TIOCMIWAIT:
- case MGSL_IOCSIF:
- case MGSL_IOCSXSYNC:
- case MGSL_IOCSXCTRL:
- rc = ioctl(tty, cmd, arg);
- break;
- }
-
- DBGINFO(("%s compat_ioctl() cmd=%08X rc=%d\n", info->device_name, cmd, rc));
- return rc;
-}
-#else
-#define slgt_compat_ioctl NULL
-#endif /* ifdef CONFIG_COMPAT */
-
-/*
- * proc fs support
- */
-static inline void line_info(struct seq_file *m, struct slgt_info *info)
-{
- char stat_buf[30];
- unsigned long flags;
-
- seq_printf(m, "%s: IO=%08X IRQ=%d MaxFrameSize=%u\n",
- info->device_name, info->phys_reg_addr,
- info->irq_level, info->max_frame_size);
-
- /* output current serial signal states */
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- stat_buf[0] = 0;
- stat_buf[1] = 0;
- if (info->signals & SerialSignal_RTS)
- strcat(stat_buf, "|RTS");
- if (info->signals & SerialSignal_CTS)
- strcat(stat_buf, "|CTS");
- if (info->signals & SerialSignal_DTR)
- strcat(stat_buf, "|DTR");
- if (info->signals & SerialSignal_DSR)
- strcat(stat_buf, "|DSR");
- if (info->signals & SerialSignal_DCD)
- strcat(stat_buf, "|CD");
- if (info->signals & SerialSignal_RI)
- strcat(stat_buf, "|RI");
-
- if (info->params.mode != MGSL_MODE_ASYNC) {
- seq_printf(m, "\tHDLC txok:%d rxok:%d",
- info->icount.txok, info->icount.rxok);
- if (info->icount.txunder)
- seq_printf(m, " txunder:%d", info->icount.txunder);
- if (info->icount.txabort)
- seq_printf(m, " txabort:%d", info->icount.txabort);
- if (info->icount.rxshort)
- seq_printf(m, " rxshort:%d", info->icount.rxshort);
- if (info->icount.rxlong)
- seq_printf(m, " rxlong:%d", info->icount.rxlong);
- if (info->icount.rxover)
- seq_printf(m, " rxover:%d", info->icount.rxover);
- if (info->icount.rxcrc)
- seq_printf(m, " rxcrc:%d", info->icount.rxcrc);
- } else {
- seq_printf(m, "\tASYNC tx:%d rx:%d",
- info->icount.tx, info->icount.rx);
- if (info->icount.frame)
- seq_printf(m, " fe:%d", info->icount.frame);
- if (info->icount.parity)
- seq_printf(m, " pe:%d", info->icount.parity);
- if (info->icount.brk)
- seq_printf(m, " brk:%d", info->icount.brk);
- if (info->icount.overrun)
- seq_printf(m, " oe:%d", info->icount.overrun);
- }
-
- /* Append serial signal status to end */
- seq_printf(m, " %s\n", stat_buf+1);
-
- seq_printf(m, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
- info->tx_active,info->bh_requested,info->bh_running,
- info->pending_bh);
-}
-
-/* Called to print information about devices
- */
-static int synclink_gt_proc_show(struct seq_file *m, void *v)
-{
- struct slgt_info *info;
-
- seq_puts(m, "synclink_gt driver\n");
-
- info = slgt_device_list;
- while( info ) {
- line_info(m, info);
- info = info->next_device;
- }
- return 0;
-}
-
-static int synclink_gt_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, synclink_gt_proc_show, NULL);
-}
-
-static const struct file_operations synclink_gt_proc_fops = {
- .owner = THIS_MODULE,
- .open = synclink_gt_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-/*
- * return count of bytes in transmit buffer
- */
-static int chars_in_buffer(struct tty_struct *tty)
-{
- struct slgt_info *info = tty->driver_data;
- int count;
- if (sanity_check(info, tty->name, "chars_in_buffer"))
- return 0;
- count = tbuf_bytes(info);
- DBGINFO(("%s chars_in_buffer()=%d\n", info->device_name, count));
- return count;
-}
-
-/*
- * signal remote device to throttle send data (our receive data)
- */
-static void throttle(struct tty_struct * tty)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned long flags;
-
- if (sanity_check(info, tty->name, "throttle"))
- return;
- DBGINFO(("%s throttle\n", info->device_name));
- if (I_IXOFF(tty))
- send_xchar(tty, STOP_CHAR(tty));
- if (tty->termios->c_cflag & CRTSCTS) {
- spin_lock_irqsave(&info->lock,flags);
- info->signals &= ~SerialSignal_RTS;
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-}
-
-/*
- * signal remote device to stop throttling send data (our receive data)
- */
-static void unthrottle(struct tty_struct * tty)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned long flags;
-
- if (sanity_check(info, tty->name, "unthrottle"))
- return;
- DBGINFO(("%s unthrottle\n", info->device_name));
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else
- send_xchar(tty, START_CHAR(tty));
- }
- if (tty->termios->c_cflag & CRTSCTS) {
- spin_lock_irqsave(&info->lock,flags);
- info->signals |= SerialSignal_RTS;
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-}
-
-/*
- * set or clear transmit break condition
- * break_state -1=set break condition, 0=clear
- */
-static int set_break(struct tty_struct *tty, int break_state)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned short value;
- unsigned long flags;
-
- if (sanity_check(info, tty->name, "set_break"))
- return -EINVAL;
- DBGINFO(("%s set_break(%d)\n", info->device_name, break_state));
-
- spin_lock_irqsave(&info->lock,flags);
- value = rd_reg16(info, TCR);
- if (break_state == -1)
- value |= BIT6;
- else
- value &= ~BIT6;
- wr_reg16(info, TCR, value);
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
-}
-
-#if SYNCLINK_GENERIC_HDLC
-
-/**
- * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
- * set encoding and frame check sequence (FCS) options
- *
- * dev pointer to network device structure
- * encoding serial encoding setting
- * parity FCS setting
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
- unsigned short parity)
-{
- struct slgt_info *info = dev_to_port(dev);
- unsigned char new_encoding;
- unsigned short new_crctype;
-
- /* return error if TTY interface open */
- if (info->port.count)
- return -EBUSY;
-
- DBGINFO(("%s hdlcdev_attach\n", info->device_name));
-
- switch (encoding)
- {
- case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
- case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
- case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
- case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
- case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
- default: return -EINVAL;
- }
-
- switch (parity)
- {
- case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
- case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
- case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
- default: return -EINVAL;
- }
-
- info->params.encoding = new_encoding;
- info->params.crc_type = new_crctype;
-
- /* if network interface up, reprogram hardware */
- if (info->netcount)
- program_hw(info);
-
- return 0;
-}
-
-/**
- * called by generic HDLC layer to send frame
- *
- * skb socket buffer containing HDLC frame
- * dev pointer to network device structure
- */
-static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct slgt_info *info = dev_to_port(dev);
- unsigned long flags;
-
- DBGINFO(("%s hdlc_xmit\n", dev->name));
-
- if (!skb->len)
- return NETDEV_TX_OK;
-
- /* stop sending until this frame completes */
- netif_stop_queue(dev);
-
- /* update network statistics */
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += skb->len;
-
- /* save start time for transmit timeout detection */
- dev->trans_start = jiffies;
-
- spin_lock_irqsave(&info->lock, flags);
- tx_load(info, skb->data, skb->len);
- spin_unlock_irqrestore(&info->lock, flags);
-
- /* done with socket buffer, so free it */
- dev_kfree_skb(skb);
-
- return NETDEV_TX_OK;
-}
-
-/**
- * called by network layer when interface enabled
- * claim resources and initialize hardware
- *
- * dev pointer to network device structure
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_open(struct net_device *dev)
-{
- struct slgt_info *info = dev_to_port(dev);
- int rc;
- unsigned long flags;
-
- if (!try_module_get(THIS_MODULE))
- return -EBUSY;
-
- DBGINFO(("%s hdlcdev_open\n", dev->name));
-
- /* generic HDLC layer open processing */
- if ((rc = hdlc_open(dev)))
- return rc;
-
- /* arbitrate between network and tty opens */
- spin_lock_irqsave(&info->netlock, flags);
- if (info->port.count != 0 || info->netcount != 0) {
- DBGINFO(("%s hdlc_open busy\n", dev->name));
- spin_unlock_irqrestore(&info->netlock, flags);
- return -EBUSY;
- }
- info->netcount=1;
- spin_unlock_irqrestore(&info->netlock, flags);
-
- /* claim resources and init adapter */
- if ((rc = startup(info)) != 0) {
- spin_lock_irqsave(&info->netlock, flags);
- info->netcount=0;
- spin_unlock_irqrestore(&info->netlock, flags);
- return rc;
- }
-
- /* assert DTR and RTS, apply hardware settings */
- info->signals |= SerialSignal_RTS + SerialSignal_DTR;
- program_hw(info);
-
- /* enable network layer transmit */
- dev->trans_start = jiffies;
- netif_start_queue(dev);
-
- /* inform generic HDLC layer of current DCD status */
- spin_lock_irqsave(&info->lock, flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock, flags);
- if (info->signals & SerialSignal_DCD)
- netif_carrier_on(dev);
- else
- netif_carrier_off(dev);
- return 0;
-}
-
-/**
- * called by network layer when interface is disabled
- * shutdown hardware and release resources
- *
- * dev pointer to network device structure
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_close(struct net_device *dev)
-{
- struct slgt_info *info = dev_to_port(dev);
- unsigned long flags;
-
- DBGINFO(("%s hdlcdev_close\n", dev->name));
-
- netif_stop_queue(dev);
-
- /* shutdown adapter and release resources */
- shutdown(info);
-
- hdlc_close(dev);
-
- spin_lock_irqsave(&info->netlock, flags);
- info->netcount=0;
- spin_unlock_irqrestore(&info->netlock, flags);
-
- module_put(THIS_MODULE);
- return 0;
-}
-
-/**
- * called by network layer to process IOCTL call to network device
- *
- * dev pointer to network device structure
- * ifr pointer to network interface request structure
- * cmd IOCTL command code
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
-{
- const size_t size = sizeof(sync_serial_settings);
- sync_serial_settings new_line;
- sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
- struct slgt_info *info = dev_to_port(dev);
- unsigned int flags;
-
- DBGINFO(("%s hdlcdev_ioctl\n", dev->name));
-
- /* return error if TTY interface open */
- if (info->port.count)
- return -EBUSY;
-
- if (cmd != SIOCWANDEV)
- return hdlc_ioctl(dev, ifr, cmd);
-
- memset(&new_line, 0, sizeof(new_line));
-
- switch(ifr->ifr_settings.type) {
- case IF_GET_IFACE: /* return current sync_serial_settings */
-
- ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
- if (ifr->ifr_settings.size < size) {
- ifr->ifr_settings.size = size; /* data size wanted */
- return -ENOBUFS;
- }
-
- flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
- HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
- HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
- HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
-
- switch (flags){
- case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
- case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
- case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
- case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
- default: new_line.clock_type = CLOCK_DEFAULT;
- }
-
- new_line.clock_rate = info->params.clock_speed;
- new_line.loopback = info->params.loopback ? 1:0;
-
- if (copy_to_user(line, &new_line, size))
- return -EFAULT;
- return 0;
-
- case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
-
- if(!capable(CAP_NET_ADMIN))
- return -EPERM;
- if (copy_from_user(&new_line, line, size))
- return -EFAULT;
-
- switch (new_line.clock_type)
- {
- case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
- case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
- case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
- case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
- case CLOCK_DEFAULT: flags = info->params.flags &
- (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
- HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
- HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
- HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
- default: return -EINVAL;
- }
-
- if (new_line.loopback != 0 && new_line.loopback != 1)
- return -EINVAL;
-
- info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
- HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
- HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
- HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
- info->params.flags |= flags;
-
- info->params.loopback = new_line.loopback;
-
- if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
- info->params.clock_speed = new_line.clock_rate;
- else
- info->params.clock_speed = 0;
-
- /* if network interface up, reprogram hardware */
- if (info->netcount)
- program_hw(info);
- return 0;
-
- default:
- return hdlc_ioctl(dev, ifr, cmd);
- }
-}
-
-/**
- * called by network layer when transmit timeout is detected
- *
- * dev pointer to network device structure
- */
-static void hdlcdev_tx_timeout(struct net_device *dev)
-{
- struct slgt_info *info = dev_to_port(dev);
- unsigned long flags;
-
- DBGINFO(("%s hdlcdev_tx_timeout\n", dev->name));
-
- dev->stats.tx_errors++;
- dev->stats.tx_aborted_errors++;
-
- spin_lock_irqsave(&info->lock,flags);
- tx_stop(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- netif_wake_queue(dev);
-}
-
-/**
- * called by device driver when transmit completes
- * reenable network layer transmit if stopped
- *
- * info pointer to device instance information
- */
-static void hdlcdev_tx_done(struct slgt_info *info)
-{
- if (netif_queue_stopped(info->netdev))
- netif_wake_queue(info->netdev);
-}
-
-/**
- * called by device driver when frame received
- * pass frame to network layer
- *
- * info pointer to device instance information
- * buf pointer to buffer contianing frame data
- * size count of data bytes in buf
- */
-static void hdlcdev_rx(struct slgt_info *info, char *buf, int size)
-{
- struct sk_buff *skb = dev_alloc_skb(size);
- struct net_device *dev = info->netdev;
-
- DBGINFO(("%s hdlcdev_rx\n", dev->name));
-
- if (skb == NULL) {
- DBGERR(("%s: can't alloc skb, drop packet\n", dev->name));
- dev->stats.rx_dropped++;
- return;
- }
-
- memcpy(skb_put(skb, size), buf, size);
-
- skb->protocol = hdlc_type_trans(skb, dev);
-
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += size;
-
- netif_rx(skb);
-}
-
-static const struct net_device_ops hdlcdev_ops = {
- .ndo_open = hdlcdev_open,
- .ndo_stop = hdlcdev_close,
- .ndo_change_mtu = hdlc_change_mtu,
- .ndo_start_xmit = hdlc_start_xmit,
- .ndo_do_ioctl = hdlcdev_ioctl,
- .ndo_tx_timeout = hdlcdev_tx_timeout,
-};
-
-/**
- * called by device driver when adding device instance
- * do generic HDLC initialization
- *
- * info pointer to device instance information
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_init(struct slgt_info *info)
-{
- int rc;
- struct net_device *dev;
- hdlc_device *hdlc;
-
- /* allocate and initialize network and HDLC layer objects */
-
- if (!(dev = alloc_hdlcdev(info))) {
- printk(KERN_ERR "%s hdlc device alloc failure\n", info->device_name);
- return -ENOMEM;
- }
-
- /* for network layer reporting purposes only */
- dev->mem_start = info->phys_reg_addr;
- dev->mem_end = info->phys_reg_addr + SLGT_REG_SIZE - 1;
- dev->irq = info->irq_level;
-
- /* network layer callbacks and settings */
- dev->netdev_ops = &hdlcdev_ops;
- dev->watchdog_timeo = 10 * HZ;
- dev->tx_queue_len = 50;
-
- /* generic HDLC layer callbacks and settings */
- hdlc = dev_to_hdlc(dev);
- hdlc->attach = hdlcdev_attach;
- hdlc->xmit = hdlcdev_xmit;
-
- /* register objects with HDLC layer */
- if ((rc = register_hdlc_device(dev))) {
- printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
- free_netdev(dev);
- return rc;
- }
-
- info->netdev = dev;
- return 0;
-}
-
-/**
- * called by device driver when removing device instance
- * do generic HDLC cleanup
- *
- * info pointer to device instance information
- */
-static void hdlcdev_exit(struct slgt_info *info)
-{
- unregister_hdlc_device(info->netdev);
- free_netdev(info->netdev);
- info->netdev = NULL;
-}
-
-#endif /* ifdef CONFIG_HDLC */
-
-/*
- * get async data from rx DMA buffers
- */
-static void rx_async(struct slgt_info *info)
-{
- struct tty_struct *tty = info->port.tty;
- struct mgsl_icount *icount = &info->icount;
- unsigned int start, end;
- unsigned char *p;
- unsigned char status;
- struct slgt_desc *bufs = info->rbufs;
- int i, count;
- int chars = 0;
- int stat;
- unsigned char ch;
-
- start = end = info->rbuf_current;
-
- while(desc_complete(bufs[end])) {
- count = desc_count(bufs[end]) - info->rbuf_index;
- p = bufs[end].buf + info->rbuf_index;
-
- DBGISR(("%s rx_async count=%d\n", info->device_name, count));
- DBGDATA(info, p, count, "rx");
-
- for(i=0 ; i < count; i+=2, p+=2) {
- ch = *p;
- icount->rx++;
-
- stat = 0;
-
- if ((status = *(p+1) & (BIT1 + BIT0))) {
- if (status & BIT1)
- icount->parity++;
- else if (status & BIT0)
- icount->frame++;
- /* discard char if tty control flags say so */
- if (status & info->ignore_status_mask)
- continue;
- if (status & BIT1)
- stat = TTY_PARITY;
- else if (status & BIT0)
- stat = TTY_FRAME;
- }
- if (tty) {
- tty_insert_flip_char(tty, ch, stat);
- chars++;
- }
- }
-
- if (i < count) {
- /* receive buffer not completed */
- info->rbuf_index += i;
- mod_timer(&info->rx_timer, jiffies + 1);
- break;
- }
-
- info->rbuf_index = 0;
- free_rbufs(info, end, end);
-
- if (++end == info->rbuf_count)
- end = 0;
-
- /* if entire list searched then no frame available */
- if (end == start)
- break;
- }
-
- if (tty && chars)
- tty_flip_buffer_push(tty);
-}
-
-/*
- * return next bottom half action to perform
- */
-static int bh_action(struct slgt_info *info)
-{
- unsigned long flags;
- int rc;
-
- spin_lock_irqsave(&info->lock,flags);
-
- if (info->pending_bh & BH_RECEIVE) {
- info->pending_bh &= ~BH_RECEIVE;
- rc = BH_RECEIVE;
- } else if (info->pending_bh & BH_TRANSMIT) {
- info->pending_bh &= ~BH_TRANSMIT;
- rc = BH_TRANSMIT;
- } else if (info->pending_bh & BH_STATUS) {
- info->pending_bh &= ~BH_STATUS;
- rc = BH_STATUS;
- } else {
- /* Mark BH routine as complete */
- info->bh_running = false;
- info->bh_requested = false;
- rc = 0;
- }
-
- spin_unlock_irqrestore(&info->lock,flags);
-
- return rc;
-}
-
-/*
- * perform bottom half processing
- */
-static void bh_handler(struct work_struct *work)
-{
- struct slgt_info *info = container_of(work, struct slgt_info, task);
- int action;
-
- if (!info)
- return;
- info->bh_running = true;
-
- while((action = bh_action(info))) {
- switch (action) {
- case BH_RECEIVE:
- DBGBH(("%s bh receive\n", info->device_name));
- switch(info->params.mode) {
- case MGSL_MODE_ASYNC:
- rx_async(info);
- break;
- case MGSL_MODE_HDLC:
- while(rx_get_frame(info));
- break;
- case MGSL_MODE_RAW:
- case MGSL_MODE_MONOSYNC:
- case MGSL_MODE_BISYNC:
- case MGSL_MODE_XSYNC:
- while(rx_get_buf(info));
- break;
- }
- /* restart receiver if rx DMA buffers exhausted */
- if (info->rx_restart)
- rx_start(info);
- break;
- case BH_TRANSMIT:
- bh_transmit(info);
- break;
- case BH_STATUS:
- DBGBH(("%s bh status\n", info->device_name));
- info->ri_chkcount = 0;
- info->dsr_chkcount = 0;
- info->dcd_chkcount = 0;
- info->cts_chkcount = 0;
- break;
- default:
- DBGBH(("%s unknown action\n", info->device_name));
- break;
- }
- }
- DBGBH(("%s bh_handler exit\n", info->device_name));
-}
-
-static void bh_transmit(struct slgt_info *info)
-{
- struct tty_struct *tty = info->port.tty;
-
- DBGBH(("%s bh_transmit\n", info->device_name));
- if (tty)
- tty_wakeup(tty);
-}
-
-static void dsr_change(struct slgt_info *info, unsigned short status)
-{
- if (status & BIT3) {
- info->signals |= SerialSignal_DSR;
- info->input_signal_events.dsr_up++;
- } else {
- info->signals &= ~SerialSignal_DSR;
- info->input_signal_events.dsr_down++;
- }
- DBGISR(("dsr_change %s signals=%04X\n", info->device_name, info->signals));
- if ((info->dsr_chkcount)++ == IO_PIN_SHUTDOWN_LIMIT) {
- slgt_irq_off(info, IRQ_DSR);
- return;
- }
- info->icount.dsr++;
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
- info->pending_bh |= BH_STATUS;
-}
-
-static void cts_change(struct slgt_info *info, unsigned short status)
-{
- if (status & BIT2) {
- info->signals |= SerialSignal_CTS;
- info->input_signal_events.cts_up++;
- } else {
- info->signals &= ~SerialSignal_CTS;
- info->input_signal_events.cts_down++;
- }
- DBGISR(("cts_change %s signals=%04X\n", info->device_name, info->signals));
- if ((info->cts_chkcount)++ == IO_PIN_SHUTDOWN_LIMIT) {
- slgt_irq_off(info, IRQ_CTS);
- return;
- }
- info->icount.cts++;
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
- info->pending_bh |= BH_STATUS;
-
- if (info->port.flags & ASYNC_CTS_FLOW) {
- if (info->port.tty) {
- if (info->port.tty->hw_stopped) {
- if (info->signals & SerialSignal_CTS) {
- info->port.tty->hw_stopped = 0;
- info->pending_bh |= BH_TRANSMIT;
- return;
- }
- } else {
- if (!(info->signals & SerialSignal_CTS))
- info->port.tty->hw_stopped = 1;
- }
- }
- }
-}
-
-static void dcd_change(struct slgt_info *info, unsigned short status)
-{
- if (status & BIT1) {
- info->signals |= SerialSignal_DCD;
- info->input_signal_events.dcd_up++;
- } else {
- info->signals &= ~SerialSignal_DCD;
- info->input_signal_events.dcd_down++;
- }
- DBGISR(("dcd_change %s signals=%04X\n", info->device_name, info->signals));
- if ((info->dcd_chkcount)++ == IO_PIN_SHUTDOWN_LIMIT) {
- slgt_irq_off(info, IRQ_DCD);
- return;
- }
- info->icount.dcd++;
-#if SYNCLINK_GENERIC_HDLC
- if (info->netcount) {
- if (info->signals & SerialSignal_DCD)
- netif_carrier_on(info->netdev);
- else
- netif_carrier_off(info->netdev);
- }
-#endif
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
- info->pending_bh |= BH_STATUS;
-
- if (info->port.flags & ASYNC_CHECK_CD) {
- if (info->signals & SerialSignal_DCD)
- wake_up_interruptible(&info->port.open_wait);
- else {
- if (info->port.tty)
- tty_hangup(info->port.tty);
- }
- }
-}
-
-static void ri_change(struct slgt_info *info, unsigned short status)
-{
- if (status & BIT0) {
- info->signals |= SerialSignal_RI;
- info->input_signal_events.ri_up++;
- } else {
- info->signals &= ~SerialSignal_RI;
- info->input_signal_events.ri_down++;
- }
- DBGISR(("ri_change %s signals=%04X\n", info->device_name, info->signals));
- if ((info->ri_chkcount)++ == IO_PIN_SHUTDOWN_LIMIT) {
- slgt_irq_off(info, IRQ_RI);
- return;
- }
- info->icount.rng++;
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
- info->pending_bh |= BH_STATUS;
-}
-
-static void isr_rxdata(struct slgt_info *info)
-{
- unsigned int count = info->rbuf_fill_count;
- unsigned int i = info->rbuf_fill_index;
- unsigned short reg;
-
- while (rd_reg16(info, SSR) & IRQ_RXDATA) {
- reg = rd_reg16(info, RDR);
- DBGISR(("isr_rxdata %s RDR=%04X\n", info->device_name, reg));
- if (desc_complete(info->rbufs[i])) {
- /* all buffers full */
- rx_stop(info);
- info->rx_restart = 1;
- continue;
- }
- info->rbufs[i].buf[count++] = (unsigned char)reg;
- /* async mode saves status byte to buffer for each data byte */
- if (info->params.mode == MGSL_MODE_ASYNC)
- info->rbufs[i].buf[count++] = (unsigned char)(reg >> 8);
- if (count == info->rbuf_fill_level || (reg & BIT10)) {
- /* buffer full or end of frame */
- set_desc_count(info->rbufs[i], count);
- set_desc_status(info->rbufs[i], BIT15 | (reg >> 8));
- info->rbuf_fill_count = count = 0;
- if (++i == info->rbuf_count)
- i = 0;
- info->pending_bh |= BH_RECEIVE;
- }
- }
-
- info->rbuf_fill_index = i;
- info->rbuf_fill_count = count;
-}
-
-static void isr_serial(struct slgt_info *info)
-{
- unsigned short status = rd_reg16(info, SSR);
-
- DBGISR(("%s isr_serial status=%04X\n", info->device_name, status));
-
- wr_reg16(info, SSR, status); /* clear pending */
-
- info->irq_occurred = true;
-
- if (info->params.mode == MGSL_MODE_ASYNC) {
- if (status & IRQ_TXIDLE) {
- if (info->tx_active)
- isr_txeom(info, status);
- }
- if (info->rx_pio && (status & IRQ_RXDATA))
- isr_rxdata(info);
- if ((status & IRQ_RXBREAK) && (status & RXBREAK)) {
- info->icount.brk++;
- /* process break detection if tty control allows */
- if (info->port.tty) {
- if (!(status & info->ignore_status_mask)) {
- if (info->read_status_mask & MASK_BREAK) {
- tty_insert_flip_char(info->port.tty, 0, TTY_BREAK);
- if (info->port.flags & ASYNC_SAK)
- do_SAK(info->port.tty);
- }
- }
- }
- }
- } else {
- if (status & (IRQ_TXIDLE + IRQ_TXUNDER))
- isr_txeom(info, status);
- if (info->rx_pio && (status & IRQ_RXDATA))
- isr_rxdata(info);
- if (status & IRQ_RXIDLE) {
- if (status & RXIDLE)
- info->icount.rxidle++;
- else
- info->icount.exithunt++;
- wake_up_interruptible(&info->event_wait_q);
- }
-
- if (status & IRQ_RXOVER)
- rx_start(info);
- }
-
- if (status & IRQ_DSR)
- dsr_change(info, status);
- if (status & IRQ_CTS)
- cts_change(info, status);
- if (status & IRQ_DCD)
- dcd_change(info, status);
- if (status & IRQ_RI)
- ri_change(info, status);
-}
-
-static void isr_rdma(struct slgt_info *info)
-{
- unsigned int status = rd_reg32(info, RDCSR);
-
- DBGISR(("%s isr_rdma status=%08x\n", info->device_name, status));
-
- /* RDCSR (rx DMA control/status)
- *
- * 31..07 reserved
- * 06 save status byte to DMA buffer
- * 05 error
- * 04 eol (end of list)
- * 03 eob (end of buffer)
- * 02 IRQ enable
- * 01 reset
- * 00 enable
- */
- wr_reg32(info, RDCSR, status); /* clear pending */
-
- if (status & (BIT5 + BIT4)) {
- DBGISR(("%s isr_rdma rx_restart=1\n", info->device_name));
- info->rx_restart = true;
- }
- info->pending_bh |= BH_RECEIVE;
-}
-
-static void isr_tdma(struct slgt_info *info)
-{
- unsigned int status = rd_reg32(info, TDCSR);
-
- DBGISR(("%s isr_tdma status=%08x\n", info->device_name, status));
-
- /* TDCSR (tx DMA control/status)
- *
- * 31..06 reserved
- * 05 error
- * 04 eol (end of list)
- * 03 eob (end of buffer)
- * 02 IRQ enable
- * 01 reset
- * 00 enable
- */
- wr_reg32(info, TDCSR, status); /* clear pending */
-
- if (status & (BIT5 + BIT4 + BIT3)) {
- // another transmit buffer has completed
- // run bottom half to get more send data from user
- info->pending_bh |= BH_TRANSMIT;
- }
-}
-
-/*
- * return true if there are unsent tx DMA buffers, otherwise false
- *
- * if there are unsent buffers then info->tbuf_start
- * is set to index of first unsent buffer
- */
-static bool unsent_tbufs(struct slgt_info *info)
-{
- unsigned int i = info->tbuf_current;
- bool rc = false;
-
- /*
- * search backwards from last loaded buffer (precedes tbuf_current)
- * for first unsent buffer (desc_count > 0)
- */
-
- do {
- if (i)
- i--;
- else
- i = info->tbuf_count - 1;
- if (!desc_count(info->tbufs[i]))
- break;
- info->tbuf_start = i;
- rc = true;
- } while (i != info->tbuf_current);
-
- return rc;
-}
-
-static void isr_txeom(struct slgt_info *info, unsigned short status)
-{
- DBGISR(("%s txeom status=%04x\n", info->device_name, status));
-
- slgt_irq_off(info, IRQ_TXDATA + IRQ_TXIDLE + IRQ_TXUNDER);
- tdma_reset(info);
- if (status & IRQ_TXUNDER) {
- unsigned short val = rd_reg16(info, TCR);
- wr_reg16(info, TCR, (unsigned short)(val | BIT2)); /* set reset bit */
- wr_reg16(info, TCR, val); /* clear reset bit */
- }
-
- if (info->tx_active) {
- if (info->params.mode != MGSL_MODE_ASYNC) {
- if (status & IRQ_TXUNDER)
- info->icount.txunder++;
- else if (status & IRQ_TXIDLE)
- info->icount.txok++;
- }
-
- if (unsent_tbufs(info)) {
- tx_start(info);
- update_tx_timer(info);
- return;
- }
- info->tx_active = false;
-
- del_timer(&info->tx_timer);
-
- if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done) {
- info->signals &= ~SerialSignal_RTS;
- info->drop_rts_on_tx_done = false;
- set_signals(info);
- }
-
-#if SYNCLINK_GENERIC_HDLC
- if (info->netcount)
- hdlcdev_tx_done(info);
- else
-#endif
- {
- if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
- tx_stop(info);
- return;
- }
- info->pending_bh |= BH_TRANSMIT;
- }
- }
-}
-
-static void isr_gpio(struct slgt_info *info, unsigned int changed, unsigned int state)
-{
- struct cond_wait *w, *prev;
-
- /* wake processes waiting for specific transitions */
- for (w = info->gpio_wait_q, prev = NULL ; w != NULL ; w = w->next) {
- if (w->data & changed) {
- w->data = state;
- wake_up_interruptible(&w->q);
- if (prev != NULL)
- prev->next = w->next;
- else
- info->gpio_wait_q = w->next;
- } else
- prev = w;
- }
-}
-
-/* interrupt service routine
- *
- * irq interrupt number
- * dev_id device ID supplied during interrupt registration
- */
-static irqreturn_t slgt_interrupt(int dummy, void *dev_id)
-{
- struct slgt_info *info = dev_id;
- unsigned int gsr;
- unsigned int i;
-
- DBGISR(("slgt_interrupt irq=%d entry\n", info->irq_level));
-
- while((gsr = rd_reg32(info, GSR) & 0xffffff00)) {
- DBGISR(("%s gsr=%08x\n", info->device_name, gsr));
- info->irq_occurred = true;
- for(i=0; i < info->port_count ; i++) {
- if (info->port_array[i] == NULL)
- continue;
- spin_lock(&info->port_array[i]->lock);
- if (gsr & (BIT8 << i))
- isr_serial(info->port_array[i]);
- if (gsr & (BIT16 << (i*2)))
- isr_rdma(info->port_array[i]);
- if (gsr & (BIT17 << (i*2)))
- isr_tdma(info->port_array[i]);
- spin_unlock(&info->port_array[i]->lock);
- }
- }
-
- if (info->gpio_present) {
- unsigned int state;
- unsigned int changed;
- spin_lock(&info->lock);
- while ((changed = rd_reg32(info, IOSR)) != 0) {
- DBGISR(("%s iosr=%08x\n", info->device_name, changed));
- /* read latched state of GPIO signals */
- state = rd_reg32(info, IOVR);
- /* clear pending GPIO interrupt bits */
- wr_reg32(info, IOSR, changed);
- for (i=0 ; i < info->port_count ; i++) {
- if (info->port_array[i] != NULL)
- isr_gpio(info->port_array[i], changed, state);
- }
- }
- spin_unlock(&info->lock);
- }
-
- for(i=0; i < info->port_count ; i++) {
- struct slgt_info *port = info->port_array[i];
- if (port == NULL)
- continue;
- spin_lock(&port->lock);
- if ((port->port.count || port->netcount) &&
- port->pending_bh && !port->bh_running &&
- !port->bh_requested) {
- DBGISR(("%s bh queued\n", port->device_name));
- schedule_work(&port->task);
- port->bh_requested = true;
- }
- spin_unlock(&port->lock);
- }
-
- DBGISR(("slgt_interrupt irq=%d exit\n", info->irq_level));
- return IRQ_HANDLED;
-}
-
-static int startup(struct slgt_info *info)
-{
- DBGINFO(("%s startup\n", info->device_name));
-
- if (info->port.flags & ASYNC_INITIALIZED)
- return 0;
-
- if (!info->tx_buf) {
- info->tx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
- if (!info->tx_buf) {
- DBGERR(("%s can't allocate tx buffer\n", info->device_name));
- return -ENOMEM;
- }
- }
-
- info->pending_bh = 0;
-
- memset(&info->icount, 0, sizeof(info->icount));
-
- /* program hardware for current parameters */
- change_params(info);
-
- if (info->port.tty)
- clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
- info->port.flags |= ASYNC_INITIALIZED;
-
- return 0;
-}
-
-/*
- * called by close() and hangup() to shutdown hardware
- */
-static void shutdown(struct slgt_info *info)
-{
- unsigned long flags;
-
- if (!(info->port.flags & ASYNC_INITIALIZED))
- return;
-
- DBGINFO(("%s shutdown\n", info->device_name));
-
- /* clear status wait queue because status changes */
- /* can't happen after shutting down the hardware */
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
-
- del_timer_sync(&info->tx_timer);
- del_timer_sync(&info->rx_timer);
-
- kfree(info->tx_buf);
- info->tx_buf = NULL;
-
- spin_lock_irqsave(&info->lock,flags);
-
- tx_stop(info);
- rx_stop(info);
-
- slgt_irq_off(info, IRQ_ALL | IRQ_MASTER);
-
- if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) {
- info->signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
- set_signals(info);
- }
-
- flush_cond_wait(&info->gpio_wait_q);
-
- spin_unlock_irqrestore(&info->lock,flags);
-
- if (info->port.tty)
- set_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
- info->port.flags &= ~ASYNC_INITIALIZED;
-}
-
-static void program_hw(struct slgt_info *info)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&info->lock,flags);
-
- rx_stop(info);
- tx_stop(info);
-
- if (info->params.mode != MGSL_MODE_ASYNC ||
- info->netcount)
- sync_mode(info);
- else
- async_mode(info);
-
- set_signals(info);
-
- info->dcd_chkcount = 0;
- info->cts_chkcount = 0;
- info->ri_chkcount = 0;
- info->dsr_chkcount = 0;
-
- slgt_irq_on(info, IRQ_DCD | IRQ_CTS | IRQ_DSR | IRQ_RI);
- get_signals(info);
-
- if (info->netcount ||
- (info->port.tty && info->port.tty->termios->c_cflag & CREAD))
- rx_start(info);
-
- spin_unlock_irqrestore(&info->lock,flags);
-}
-
-/*
- * reconfigure adapter based on new parameters
- */
-static void change_params(struct slgt_info *info)
-{
- unsigned cflag;
- int bits_per_char;
-
- if (!info->port.tty || !info->port.tty->termios)
- return;
- DBGINFO(("%s change_params\n", info->device_name));
-
- cflag = info->port.tty->termios->c_cflag;
-
- /* if B0 rate (hangup) specified then negate DTR and RTS */
- /* otherwise assert DTR and RTS */
- if (cflag & CBAUD)
- info->signals |= SerialSignal_RTS + SerialSignal_DTR;
- else
- info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
-
- /* byte size and parity */
-
- switch (cflag & CSIZE) {
- case CS5: info->params.data_bits = 5; break;
- case CS6: info->params.data_bits = 6; break;
- case CS7: info->params.data_bits = 7; break;
- case CS8: info->params.data_bits = 8; break;
- default: info->params.data_bits = 7; break;
- }
-
- info->params.stop_bits = (cflag & CSTOPB) ? 2 : 1;
-
- if (cflag & PARENB)
- info->params.parity = (cflag & PARODD) ? ASYNC_PARITY_ODD : ASYNC_PARITY_EVEN;
- else
- info->params.parity = ASYNC_PARITY_NONE;
-
- /* calculate number of jiffies to transmit a full
- * FIFO (32 bytes) at specified data rate
- */
- bits_per_char = info->params.data_bits +
- info->params.stop_bits + 1;
-
- info->params.data_rate = tty_get_baud_rate(info->port.tty);
-
- if (info->params.data_rate) {
- info->timeout = (32*HZ*bits_per_char) /
- info->params.data_rate;
- }
- info->timeout += HZ/50; /* Add .02 seconds of slop */
-
- if (cflag & CRTSCTS)
- info->port.flags |= ASYNC_CTS_FLOW;
- else
- info->port.flags &= ~ASYNC_CTS_FLOW;
-
- if (cflag & CLOCAL)
- info->port.flags &= ~ASYNC_CHECK_CD;
- else
- info->port.flags |= ASYNC_CHECK_CD;
-
- /* process tty input control flags */
-
- info->read_status_mask = IRQ_RXOVER;
- if (I_INPCK(info->port.tty))
- info->read_status_mask |= MASK_PARITY | MASK_FRAMING;
- if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
- info->read_status_mask |= MASK_BREAK;
- if (I_IGNPAR(info->port.tty))
- info->ignore_status_mask |= MASK_PARITY | MASK_FRAMING;
- if (I_IGNBRK(info->port.tty)) {
- info->ignore_status_mask |= MASK_BREAK;
- /* If ignoring parity and break indicators, ignore
- * overruns too. (For real raw support).
- */
- if (I_IGNPAR(info->port.tty))
- info->ignore_status_mask |= MASK_OVERRUN;
- }
-
- program_hw(info);
-}
-
-static int get_stats(struct slgt_info *info, struct mgsl_icount __user *user_icount)
-{
- DBGINFO(("%s get_stats\n", info->device_name));
- if (!user_icount) {
- memset(&info->icount, 0, sizeof(info->icount));
- } else {
- if (copy_to_user(user_icount, &info->icount, sizeof(struct mgsl_icount)))
- return -EFAULT;
- }
- return 0;
-}
-
-static int get_params(struct slgt_info *info, MGSL_PARAMS __user *user_params)
-{
- DBGINFO(("%s get_params\n", info->device_name));
- if (copy_to_user(user_params, &info->params, sizeof(MGSL_PARAMS)))
- return -EFAULT;
- return 0;
-}
-
-static int set_params(struct slgt_info *info, MGSL_PARAMS __user *new_params)
-{
- unsigned long flags;
- MGSL_PARAMS tmp_params;
-
- DBGINFO(("%s set_params\n", info->device_name));
- if (copy_from_user(&tmp_params, new_params, sizeof(MGSL_PARAMS)))
- return -EFAULT;
-
- spin_lock_irqsave(&info->lock, flags);
- if (tmp_params.mode == MGSL_MODE_BASE_CLOCK)
- info->base_clock = tmp_params.clock_speed;
- else
- memcpy(&info->params, &tmp_params, sizeof(MGSL_PARAMS));
- spin_unlock_irqrestore(&info->lock, flags);
-
- program_hw(info);
-
- return 0;
-}
-
-static int get_txidle(struct slgt_info *info, int __user *idle_mode)
-{
- DBGINFO(("%s get_txidle=%d\n", info->device_name, info->idle_mode));
- if (put_user(info->idle_mode, idle_mode))
- return -EFAULT;
- return 0;
-}
-
-static int set_txidle(struct slgt_info *info, int idle_mode)
-{
- unsigned long flags;
- DBGINFO(("%s set_txidle(%d)\n", info->device_name, idle_mode));
- spin_lock_irqsave(&info->lock,flags);
- info->idle_mode = idle_mode;
- if (info->params.mode != MGSL_MODE_ASYNC)
- tx_set_idle(info);
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
-}
-
-static int tx_enable(struct slgt_info *info, int enable)
-{
- unsigned long flags;
- DBGINFO(("%s tx_enable(%d)\n", info->device_name, enable));
- spin_lock_irqsave(&info->lock,flags);
- if (enable) {
- if (!info->tx_enabled)
- tx_start(info);
- } else {
- if (info->tx_enabled)
- tx_stop(info);
- }
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
-}
-
-/*
- * abort transmit HDLC frame
- */
-static int tx_abort(struct slgt_info *info)
-{
- unsigned long flags;
- DBGINFO(("%s tx_abort\n", info->device_name));
- spin_lock_irqsave(&info->lock,flags);
- tdma_reset(info);
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
-}
-
-static int rx_enable(struct slgt_info *info, int enable)
-{
- unsigned long flags;
- unsigned int rbuf_fill_level;
- DBGINFO(("%s rx_enable(%08x)\n", info->device_name, enable));
- spin_lock_irqsave(&info->lock,flags);
- /*
- * enable[31..16] = receive DMA buffer fill level
- * 0 = noop (leave fill level unchanged)
- * fill level must be multiple of 4 and <= buffer size
- */
- rbuf_fill_level = ((unsigned int)enable) >> 16;
- if (rbuf_fill_level) {
- if ((rbuf_fill_level > DMABUFSIZE) || (rbuf_fill_level % 4)) {
- spin_unlock_irqrestore(&info->lock, flags);
- return -EINVAL;
- }
- info->rbuf_fill_level = rbuf_fill_level;
- if (rbuf_fill_level < 128)
- info->rx_pio = 1; /* PIO mode */
- else
- info->rx_pio = 0; /* DMA mode */
- rx_stop(info); /* restart receiver to use new fill level */
- }
-
- /*
- * enable[1..0] = receiver enable command
- * 0 = disable
- * 1 = enable
- * 2 = enable or force hunt mode if already enabled
- */
- enable &= 3;
- if (enable) {
- if (!info->rx_enabled)
- rx_start(info);
- else if (enable == 2) {
- /* force hunt mode (write 1 to RCR[3]) */
- wr_reg16(info, RCR, rd_reg16(info, RCR) | BIT3);
- }
- } else {
- if (info->rx_enabled)
- rx_stop(info);
- }
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
-}
-
-/*
- * wait for specified event to occur
- */
-static int wait_mgsl_event(struct slgt_info *info, int __user *mask_ptr)
-{
- unsigned long flags;
- int s;
- int rc=0;
- struct mgsl_icount cprev, cnow;
- int events;
- int mask;
- struct _input_signal_events oldsigs, newsigs;
- DECLARE_WAITQUEUE(wait, current);
-
- if (get_user(mask, mask_ptr))
- return -EFAULT;
-
- DBGINFO(("%s wait_mgsl_event(%d)\n", info->device_name, mask));
-
- spin_lock_irqsave(&info->lock,flags);
-
- /* return immediately if state matches requested events */
- get_signals(info);
- s = info->signals;
-
- events = mask &
- ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
- ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
- ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
- ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
- if (events) {
- spin_unlock_irqrestore(&info->lock,flags);
- goto exit;
- }
-
- /* save current irq counts */
- cprev = info->icount;
- oldsigs = info->input_signal_events;
-
- /* enable hunt and idle irqs if needed */
- if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) {
- unsigned short val = rd_reg16(info, SCR);
- if (!(val & IRQ_RXIDLE))
- wr_reg16(info, SCR, (unsigned short)(val | IRQ_RXIDLE));
- }
-
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&info->event_wait_q, &wait);
-
- spin_unlock_irqrestore(&info->lock,flags);
-
- for(;;) {
- schedule();
- if (signal_pending(current)) {
- rc = -ERESTARTSYS;
- break;
- }
-
- /* get current irq counts */
- spin_lock_irqsave(&info->lock,flags);
- cnow = info->icount;
- newsigs = info->input_signal_events;
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->lock,flags);
-
- /* if no change, wait aborted for some reason */
- if (newsigs.dsr_up == oldsigs.dsr_up &&
- newsigs.dsr_down == oldsigs.dsr_down &&
- newsigs.dcd_up == oldsigs.dcd_up &&
- newsigs.dcd_down == oldsigs.dcd_down &&
- newsigs.cts_up == oldsigs.cts_up &&
- newsigs.cts_down == oldsigs.cts_down &&
- newsigs.ri_up == oldsigs.ri_up &&
- newsigs.ri_down == oldsigs.ri_down &&
- cnow.exithunt == cprev.exithunt &&
- cnow.rxidle == cprev.rxidle) {
- rc = -EIO;
- break;
- }
-
- events = mask &
- ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
- (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
- (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
- (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
- (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
- (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
- (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
- (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
- (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
- (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
- if (events)
- break;
-
- cprev = cnow;
- oldsigs = newsigs;
- }
-
- remove_wait_queue(&info->event_wait_q, &wait);
- set_current_state(TASK_RUNNING);
-
-
- if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
- spin_lock_irqsave(&info->lock,flags);
- if (!waitqueue_active(&info->event_wait_q)) {
- /* disable enable exit hunt mode/idle rcvd IRQs */
- wr_reg16(info, SCR,
- (unsigned short)(rd_reg16(info, SCR) & ~IRQ_RXIDLE));
- }
- spin_unlock_irqrestore(&info->lock,flags);
- }
-exit:
- if (rc == 0)
- rc = put_user(events, mask_ptr);
- return rc;
-}
-
-static int get_interface(struct slgt_info *info, int __user *if_mode)
-{
- DBGINFO(("%s get_interface=%x\n", info->device_name, info->if_mode));
- if (put_user(info->if_mode, if_mode))
- return -EFAULT;
- return 0;
-}
-
-static int set_interface(struct slgt_info *info, int if_mode)
-{
- unsigned long flags;
- unsigned short val;
-
- DBGINFO(("%s set_interface=%x)\n", info->device_name, if_mode));
- spin_lock_irqsave(&info->lock,flags);
- info->if_mode = if_mode;
-
- msc_set_vcr(info);
-
- /* TCR (tx control) 07 1=RTS driver control */
- val = rd_reg16(info, TCR);
- if (info->if_mode & MGSL_INTERFACE_RTS_EN)
- val |= BIT7;
- else
- val &= ~BIT7;
- wr_reg16(info, TCR, val);
-
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
-}
-
-static int get_xsync(struct slgt_info *info, int __user *xsync)
-{
- DBGINFO(("%s get_xsync=%x\n", info->device_name, info->xsync));
- if (put_user(info->xsync, xsync))
- return -EFAULT;
- return 0;
-}
-
-/*
- * set extended sync pattern (1 to 4 bytes) for extended sync mode
- *
- * sync pattern is contained in least significant bytes of value
- * most significant byte of sync pattern is oldest (1st sent/detected)
- */
-static int set_xsync(struct slgt_info *info, int xsync)
-{
- unsigned long flags;
-
- DBGINFO(("%s set_xsync=%x)\n", info->device_name, xsync));
- spin_lock_irqsave(&info->lock, flags);
- info->xsync = xsync;
- wr_reg32(info, XSR, xsync);
- spin_unlock_irqrestore(&info->lock, flags);
- return 0;
-}
-
-static int get_xctrl(struct slgt_info *info, int __user *xctrl)
-{
- DBGINFO(("%s get_xctrl=%x\n", info->device_name, info->xctrl));
- if (put_user(info->xctrl, xctrl))
- return -EFAULT;
- return 0;
-}
-
-/*
- * set extended control options
- *
- * xctrl[31:19] reserved, must be zero
- * xctrl[18:17] extended sync pattern length in bytes
- * 00 = 1 byte in xsr[7:0]
- * 01 = 2 bytes in xsr[15:0]
- * 10 = 3 bytes in xsr[23:0]
- * 11 = 4 bytes in xsr[31:0]
- * xctrl[16] 1 = enable terminal count, 0=disabled
- * xctrl[15:0] receive terminal count for fixed length packets
- * value is count minus one (0 = 1 byte packet)
- * when terminal count is reached, receiver
- * automatically returns to hunt mode and receive
- * FIFO contents are flushed to DMA buffers with
- * end of frame (EOF) status
- */
-static int set_xctrl(struct slgt_info *info, int xctrl)
-{
- unsigned long flags;
-
- DBGINFO(("%s set_xctrl=%x)\n", info->device_name, xctrl));
- spin_lock_irqsave(&info->lock, flags);
- info->xctrl = xctrl;
- wr_reg32(info, XCR, xctrl);
- spin_unlock_irqrestore(&info->lock, flags);
- return 0;
-}
-
-/*
- * set general purpose IO pin state and direction
- *
- * user_gpio fields:
- * state each bit indicates a pin state
- * smask set bit indicates pin state to set
- * dir each bit indicates a pin direction (0=input, 1=output)
- * dmask set bit indicates pin direction to set
- */
-static int set_gpio(struct slgt_info *info, struct gpio_desc __user *user_gpio)
-{
- unsigned long flags;
- struct gpio_desc gpio;
- __u32 data;
-
- if (!info->gpio_present)
- return -EINVAL;
- if (copy_from_user(&gpio, user_gpio, sizeof(gpio)))
- return -EFAULT;
- DBGINFO(("%s set_gpio state=%08x smask=%08x dir=%08x dmask=%08x\n",
- info->device_name, gpio.state, gpio.smask,
- gpio.dir, gpio.dmask));
-
- spin_lock_irqsave(&info->port_array[0]->lock, flags);
- if (gpio.dmask) {
- data = rd_reg32(info, IODR);
- data |= gpio.dmask & gpio.dir;
- data &= ~(gpio.dmask & ~gpio.dir);
- wr_reg32(info, IODR, data);
- }
- if (gpio.smask) {
- data = rd_reg32(info, IOVR);
- data |= gpio.smask & gpio.state;
- data &= ~(gpio.smask & ~gpio.state);
- wr_reg32(info, IOVR, data);
- }
- spin_unlock_irqrestore(&info->port_array[0]->lock, flags);
-
- return 0;
-}
-
-/*
- * get general purpose IO pin state and direction
- */
-static int get_gpio(struct slgt_info *info, struct gpio_desc __user *user_gpio)
-{
- struct gpio_desc gpio;
- if (!info->gpio_present)
- return -EINVAL;
- gpio.state = rd_reg32(info, IOVR);
- gpio.smask = 0xffffffff;
- gpio.dir = rd_reg32(info, IODR);
- gpio.dmask = 0xffffffff;
- if (copy_to_user(user_gpio, &gpio, sizeof(gpio)))
- return -EFAULT;
- DBGINFO(("%s get_gpio state=%08x dir=%08x\n",
- info->device_name, gpio.state, gpio.dir));
- return 0;
-}
-
-/*
- * conditional wait facility
- */
-static void init_cond_wait(struct cond_wait *w, unsigned int data)
-{
- init_waitqueue_head(&w->q);
- init_waitqueue_entry(&w->wait, current);
- w->data = data;
-}
-
-static void add_cond_wait(struct cond_wait **head, struct cond_wait *w)
-{
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&w->q, &w->wait);
- w->next = *head;
- *head = w;
-}
-
-static void remove_cond_wait(struct cond_wait **head, struct cond_wait *cw)
-{
- struct cond_wait *w, *prev;
- remove_wait_queue(&cw->q, &cw->wait);
- set_current_state(TASK_RUNNING);
- for (w = *head, prev = NULL ; w != NULL ; prev = w, w = w->next) {
- if (w == cw) {
- if (prev != NULL)
- prev->next = w->next;
- else
- *head = w->next;
- break;
- }
- }
-}
-
-static void flush_cond_wait(struct cond_wait **head)
-{
- while (*head != NULL) {
- wake_up_interruptible(&(*head)->q);
- *head = (*head)->next;
- }
-}
-
-/*
- * wait for general purpose I/O pin(s) to enter specified state
- *
- * user_gpio fields:
- * state - bit indicates target pin state
- * smask - set bit indicates watched pin
- *
- * The wait ends when at least one watched pin enters the specified
- * state. When 0 (no error) is returned, user_gpio->state is set to the
- * state of all GPIO pins when the wait ends.
- *
- * Note: Each pin may be a dedicated input, dedicated output, or
- * configurable input/output. The number and configuration of pins
- * varies with the specific adapter model. Only input pins (dedicated
- * or configured) can be monitored with this function.
- */
-static int wait_gpio(struct slgt_info *info, struct gpio_desc __user *user_gpio)
-{
- unsigned long flags;
- int rc = 0;
- struct gpio_desc gpio;
- struct cond_wait wait;
- u32 state;
-
- if (!info->gpio_present)
- return -EINVAL;
- if (copy_from_user(&gpio, user_gpio, sizeof(gpio)))
- return -EFAULT;
- DBGINFO(("%s wait_gpio() state=%08x smask=%08x\n",
- info->device_name, gpio.state, gpio.smask));
- /* ignore output pins identified by set IODR bit */
- if ((gpio.smask &= ~rd_reg32(info, IODR)) == 0)
- return -EINVAL;
- init_cond_wait(&wait, gpio.smask);
-
- spin_lock_irqsave(&info->port_array[0]->lock, flags);
- /* enable interrupts for watched pins */
- wr_reg32(info, IOER, rd_reg32(info, IOER) | gpio.smask);
- /* get current pin states */
- state = rd_reg32(info, IOVR);
-
- if (gpio.smask & ~(state ^ gpio.state)) {
- /* already in target state */
- gpio.state = state;
- } else {
- /* wait for target state */
- add_cond_wait(&info->gpio_wait_q, &wait);
- spin_unlock_irqrestore(&info->port_array[0]->lock, flags);
- schedule();
- if (signal_pending(current))
- rc = -ERESTARTSYS;
- else
- gpio.state = wait.data;
- spin_lock_irqsave(&info->port_array[0]->lock, flags);
- remove_cond_wait(&info->gpio_wait_q, &wait);
- }
-
- /* disable all GPIO interrupts if no waiting processes */
- if (info->gpio_wait_q == NULL)
- wr_reg32(info, IOER, 0);
- spin_unlock_irqrestore(&info->port_array[0]->lock, flags);
-
- if ((rc == 0) && copy_to_user(user_gpio, &gpio, sizeof(gpio)))
- rc = -EFAULT;
- return rc;
-}
-
-static int modem_input_wait(struct slgt_info *info,int arg)
-{
- unsigned long flags;
- int rc;
- struct mgsl_icount cprev, cnow;
- DECLARE_WAITQUEUE(wait, current);
-
- /* save current irq counts */
- spin_lock_irqsave(&info->lock,flags);
- cprev = info->icount;
- add_wait_queue(&info->status_event_wait_q, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->lock,flags);
-
- for(;;) {
- schedule();
- if (signal_pending(current)) {
- rc = -ERESTARTSYS;
- break;
- }
-
- /* get new irq counts */
- spin_lock_irqsave(&info->lock,flags);
- cnow = info->icount;
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->lock,flags);
-
- /* if no change, wait aborted for some reason */
- if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
- cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
- rc = -EIO;
- break;
- }
-
- /* check for change in caller specified modem input */
- if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
- (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
- (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
- (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
- rc = 0;
- break;
- }
-
- cprev = cnow;
- }
- remove_wait_queue(&info->status_event_wait_q, &wait);
- set_current_state(TASK_RUNNING);
- return rc;
-}
-
-/*
- * return state of serial control and status signals
- */
-static int tiocmget(struct tty_struct *tty)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned int result;
- unsigned long flags;
-
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- result = ((info->signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
- ((info->signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
- ((info->signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
- ((info->signals & SerialSignal_RI) ? TIOCM_RNG:0) +
- ((info->signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
- ((info->signals & SerialSignal_CTS) ? TIOCM_CTS:0);
-
- DBGINFO(("%s tiocmget value=%08X\n", info->device_name, result));
- return result;
-}
-
-/*
- * set modem control signals (DTR/RTS)
- *
- * cmd signal command: TIOCMBIS = set bit TIOCMBIC = clear bit
- * TIOCMSET = set/clear signal values
- * value bit mask for command
- */
-static int tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- struct slgt_info *info = tty->driver_data;
- unsigned long flags;
-
- DBGINFO(("%s tiocmset(%x,%x)\n", info->device_name, set, clear));
-
- if (set & TIOCM_RTS)
- info->signals |= SerialSignal_RTS;
- if (set & TIOCM_DTR)
- info->signals |= SerialSignal_DTR;
- if (clear & TIOCM_RTS)
- info->signals &= ~SerialSignal_RTS;
- if (clear & TIOCM_DTR)
- info->signals &= ~SerialSignal_DTR;
-
- spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
-}
-
-static int carrier_raised(struct tty_port *port)
-{
- unsigned long flags;
- struct slgt_info *info = container_of(port, struct slgt_info, port);
-
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- return (info->signals & SerialSignal_DCD) ? 1 : 0;
-}
-
-static void dtr_rts(struct tty_port *port, int on)
-{
- unsigned long flags;
- struct slgt_info *info = container_of(port, struct slgt_info, port);
-
- spin_lock_irqsave(&info->lock,flags);
- if (on)
- info->signals |= SerialSignal_RTS + SerialSignal_DTR;
- else
- info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
-}
-
-
-/*
- * block current process until the device is ready to open
- */
-static int block_til_ready(struct tty_struct *tty, struct file *filp,
- struct slgt_info *info)
-{
- DECLARE_WAITQUEUE(wait, current);
- int retval;
- bool do_clocal = false;
- bool extra_count = false;
- unsigned long flags;
- int cd;
- struct tty_port *port = &info->port;
-
- DBGINFO(("%s block_til_ready\n", tty->driver->name));
-
- if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
- /* nonblock mode is set or port is not enabled */
- port->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
- }
-
- if (tty->termios->c_cflag & CLOCAL)
- do_clocal = true;
-
- /* Wait for carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, port->count is dropped by one, so that
- * close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
-
- retval = 0;
- add_wait_queue(&port->open_wait, &wait);
-
- spin_lock_irqsave(&info->lock, flags);
- if (!tty_hung_up_p(filp)) {
- extra_count = true;
- port->count--;
- }
- spin_unlock_irqrestore(&info->lock, flags);
- port->blocked_open++;
-
- while (1) {
- if ((tty->termios->c_cflag & CBAUD))
- tty_port_raise_dtr_rts(port);
-
- set_current_state(TASK_INTERRUPTIBLE);
-
- if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
- retval = (port->flags & ASYNC_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS;
- break;
- }
-
- cd = tty_port_carrier_raised(port);
-
- if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd ))
- break;
-
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
-
- DBGINFO(("%s block_til_ready wait\n", tty->driver->name));
- tty_unlock();
- schedule();
- tty_lock();
- }
-
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&port->open_wait, &wait);
-
- if (extra_count)
- port->count++;
- port->blocked_open--;
-
- if (!retval)
- port->flags |= ASYNC_NORMAL_ACTIVE;
-
- DBGINFO(("%s block_til_ready ready, rc=%d\n", tty->driver->name, retval));
- return retval;
-}
-
-static int alloc_tmp_rbuf(struct slgt_info *info)
-{
- info->tmp_rbuf = kmalloc(info->max_frame_size + 5, GFP_KERNEL);
- if (info->tmp_rbuf == NULL)
- return -ENOMEM;
- return 0;
-}
-
-static void free_tmp_rbuf(struct slgt_info *info)
-{
- kfree(info->tmp_rbuf);
- info->tmp_rbuf = NULL;
-}
-
-/*
- * allocate DMA descriptor lists.
- */
-static int alloc_desc(struct slgt_info *info)
-{
- unsigned int i;
- unsigned int pbufs;
-
- /* allocate memory to hold descriptor lists */
- info->bufs = pci_alloc_consistent(info->pdev, DESC_LIST_SIZE, &info->bufs_dma_addr);
- if (info->bufs == NULL)
- return -ENOMEM;
-
- memset(info->bufs, 0, DESC_LIST_SIZE);
-
- info->rbufs = (struct slgt_desc*)info->bufs;
- info->tbufs = ((struct slgt_desc*)info->bufs) + info->rbuf_count;
-
- pbufs = (unsigned int)info->bufs_dma_addr;
-
- /*
- * Build circular lists of descriptors
- */
-
- for (i=0; i < info->rbuf_count; i++) {
- /* physical address of this descriptor */
- info->rbufs[i].pdesc = pbufs + (i * sizeof(struct slgt_desc));
-
- /* physical address of next descriptor */
- if (i == info->rbuf_count - 1)
- info->rbufs[i].next = cpu_to_le32(pbufs);
- else
- info->rbufs[i].next = cpu_to_le32(pbufs + ((i+1) * sizeof(struct slgt_desc)));
- set_desc_count(info->rbufs[i], DMABUFSIZE);
- }
-
- for (i=0; i < info->tbuf_count; i++) {
- /* physical address of this descriptor */
- info->tbufs[i].pdesc = pbufs + ((info->rbuf_count + i) * sizeof(struct slgt_desc));
-
- /* physical address of next descriptor */
- if (i == info->tbuf_count - 1)
- info->tbufs[i].next = cpu_to_le32(pbufs + info->rbuf_count * sizeof(struct slgt_desc));
- else
- info->tbufs[i].next = cpu_to_le32(pbufs + ((info->rbuf_count + i + 1) * sizeof(struct slgt_desc)));
- }
-
- return 0;
-}
-
-static void free_desc(struct slgt_info *info)
-{
- if (info->bufs != NULL) {
- pci_free_consistent(info->pdev, DESC_LIST_SIZE, info->bufs, info->bufs_dma_addr);
- info->bufs = NULL;
- info->rbufs = NULL;
- info->tbufs = NULL;
- }
-}
-
-static int alloc_bufs(struct slgt_info *info, struct slgt_desc *bufs, int count)
-{
- int i;
- for (i=0; i < count; i++) {
- if ((bufs[i].buf = pci_alloc_consistent(info->pdev, DMABUFSIZE, &bufs[i].buf_dma_addr)) == NULL)
- return -ENOMEM;
- bufs[i].pbuf = cpu_to_le32((unsigned int)bufs[i].buf_dma_addr);
- }
- return 0;
-}
-
-static void free_bufs(struct slgt_info *info, struct slgt_desc *bufs, int count)
-{
- int i;
- for (i=0; i < count; i++) {
- if (bufs[i].buf == NULL)
- continue;
- pci_free_consistent(info->pdev, DMABUFSIZE, bufs[i].buf, bufs[i].buf_dma_addr);
- bufs[i].buf = NULL;
- }
-}
-
-static int alloc_dma_bufs(struct slgt_info *info)
-{
- info->rbuf_count = 32;
- info->tbuf_count = 32;
-
- if (alloc_desc(info) < 0 ||
- alloc_bufs(info, info->rbufs, info->rbuf_count) < 0 ||
- alloc_bufs(info, info->tbufs, info->tbuf_count) < 0 ||
- alloc_tmp_rbuf(info) < 0) {
- DBGERR(("%s DMA buffer alloc fail\n", info->device_name));
- return -ENOMEM;
- }
- reset_rbufs(info);
- return 0;
-}
-
-static void free_dma_bufs(struct slgt_info *info)
-{
- if (info->bufs) {
- free_bufs(info, info->rbufs, info->rbuf_count);
- free_bufs(info, info->tbufs, info->tbuf_count);
- free_desc(info);
- }
- free_tmp_rbuf(info);
-}
-
-static int claim_resources(struct slgt_info *info)
-{
- if (request_mem_region(info->phys_reg_addr, SLGT_REG_SIZE, "synclink_gt") == NULL) {
- DBGERR(("%s reg addr conflict, addr=%08X\n",
- info->device_name, info->phys_reg_addr));
- info->init_error = DiagStatus_AddressConflict;
- goto errout;
- }
- else
- info->reg_addr_requested = true;
-
- info->reg_addr = ioremap_nocache(info->phys_reg_addr, SLGT_REG_SIZE);
- if (!info->reg_addr) {
- DBGERR(("%s cant map device registers, addr=%08X\n",
- info->device_name, info->phys_reg_addr));
- info->init_error = DiagStatus_CantAssignPciResources;
- goto errout;
- }
- return 0;
-
-errout:
- release_resources(info);
- return -ENODEV;
-}
-
-static void release_resources(struct slgt_info *info)
-{
- if (info->irq_requested) {
- free_irq(info->irq_level, info);
- info->irq_requested = false;
- }
-
- if (info->reg_addr_requested) {
- release_mem_region(info->phys_reg_addr, SLGT_REG_SIZE);
- info->reg_addr_requested = false;
- }
-
- if (info->reg_addr) {
- iounmap(info->reg_addr);
- info->reg_addr = NULL;
- }
-}
-
-/* Add the specified device instance data structure to the
- * global linked list of devices and increment the device count.
- */
-static void add_device(struct slgt_info *info)
-{
- char *devstr;
-
- info->next_device = NULL;
- info->line = slgt_device_count;
- sprintf(info->device_name, "%s%d", tty_dev_prefix, info->line);
-
- if (info->line < MAX_DEVICES) {
- if (maxframe[info->line])
- info->max_frame_size = maxframe[info->line];
- }
-
- slgt_device_count++;
-
- if (!slgt_device_list)
- slgt_device_list = info;
- else {
- struct slgt_info *current_dev = slgt_device_list;
- while(current_dev->next_device)
- current_dev = current_dev->next_device;
- current_dev->next_device = info;
- }
-
- if (info->max_frame_size < 4096)
- info->max_frame_size = 4096;
- else if (info->max_frame_size > 65535)
- info->max_frame_size = 65535;
-
- switch(info->pdev->device) {
- case SYNCLINK_GT_DEVICE_ID:
- devstr = "GT";
- break;
- case SYNCLINK_GT2_DEVICE_ID:
- devstr = "GT2";
- break;
- case SYNCLINK_GT4_DEVICE_ID:
- devstr = "GT4";
- break;
- case SYNCLINK_AC_DEVICE_ID:
- devstr = "AC";
- info->params.mode = MGSL_MODE_ASYNC;
- break;
- default:
- devstr = "(unknown model)";
- }
- printk("SyncLink %s %s IO=%08x IRQ=%d MaxFrameSize=%u\n",
- devstr, info->device_name, info->phys_reg_addr,
- info->irq_level, info->max_frame_size);
-
-#if SYNCLINK_GENERIC_HDLC
- hdlcdev_init(info);
-#endif
-}
-
-static const struct tty_port_operations slgt_port_ops = {
- .carrier_raised = carrier_raised,
- .dtr_rts = dtr_rts,
-};
-
-/*
- * allocate device instance structure, return NULL on failure
- */
-static struct slgt_info *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev)
-{
- struct slgt_info *info;
-
- info = kzalloc(sizeof(struct slgt_info), GFP_KERNEL);
-
- if (!info) {
- DBGERR(("%s device alloc failed adapter=%d port=%d\n",
- driver_name, adapter_num, port_num));
- } else {
- tty_port_init(&info->port);
- info->port.ops = &slgt_port_ops;
- info->magic = MGSL_MAGIC;
- INIT_WORK(&info->task, bh_handler);
- info->max_frame_size = 4096;
- info->base_clock = 14745600;
- info->rbuf_fill_level = DMABUFSIZE;
- info->port.close_delay = 5*HZ/10;
- info->port.closing_wait = 30*HZ;
- init_waitqueue_head(&info->status_event_wait_q);
- init_waitqueue_head(&info->event_wait_q);
- spin_lock_init(&info->netlock);
- memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
- info->idle_mode = HDLC_TXIDLE_FLAGS;
- info->adapter_num = adapter_num;
- info->port_num = port_num;
-
- setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info);
- setup_timer(&info->rx_timer, rx_timeout, (unsigned long)info);
-
- /* Copy configuration info to device instance data */
- info->pdev = pdev;
- info->irq_level = pdev->irq;
- info->phys_reg_addr = pci_resource_start(pdev,0);
-
- info->bus_type = MGSL_BUS_TYPE_PCI;
- info->irq_flags = IRQF_SHARED;
-
- info->init_error = -1; /* assume error, set to 0 on successful init */
- }
-
- return info;
-}
-
-static void device_init(int adapter_num, struct pci_dev *pdev)
-{
- struct slgt_info *port_array[SLGT_MAX_PORTS];
- int i;
- int port_count = 1;
-
- if (pdev->device == SYNCLINK_GT2_DEVICE_ID)
- port_count = 2;
- else if (pdev->device == SYNCLINK_GT4_DEVICE_ID)
- port_count = 4;
-
- /* allocate device instances for all ports */
- for (i=0; i < port_count; ++i) {
- port_array[i] = alloc_dev(adapter_num, i, pdev);
- if (port_array[i] == NULL) {
- for (--i; i >= 0; --i)
- kfree(port_array[i]);
- return;
- }
- }
-
- /* give copy of port_array to all ports and add to device list */
- for (i=0; i < port_count; ++i) {
- memcpy(port_array[i]->port_array, port_array, sizeof(port_array));
- add_device(port_array[i]);
- port_array[i]->port_count = port_count;
- spin_lock_init(&port_array[i]->lock);
- }
-
- /* Allocate and claim adapter resources */
- if (!claim_resources(port_array[0])) {
-
- alloc_dma_bufs(port_array[0]);
-
- /* copy resource information from first port to others */
- for (i = 1; i < port_count; ++i) {
- port_array[i]->irq_level = port_array[0]->irq_level;
- port_array[i]->reg_addr = port_array[0]->reg_addr;
- alloc_dma_bufs(port_array[i]);
- }
-
- if (request_irq(port_array[0]->irq_level,
- slgt_interrupt,
- port_array[0]->irq_flags,
- port_array[0]->device_name,
- port_array[0]) < 0) {
- DBGERR(("%s request_irq failed IRQ=%d\n",
- port_array[0]->device_name,
- port_array[0]->irq_level));
- } else {
- port_array[0]->irq_requested = true;
- adapter_test(port_array[0]);
- for (i=1 ; i < port_count ; i++) {
- port_array[i]->init_error = port_array[0]->init_error;
- port_array[i]->gpio_present = port_array[0]->gpio_present;
- }
- }
- }
-
- for (i=0; i < port_count; ++i)
- tty_register_device(serial_driver, port_array[i]->line, &(port_array[i]->pdev->dev));
-}
-
-static int __devinit init_one(struct pci_dev *dev,
- const struct pci_device_id *ent)
-{
- if (pci_enable_device(dev)) {
- printk("error enabling pci device %p\n", dev);
- return -EIO;
- }
- pci_set_master(dev);
- device_init(slgt_device_count, dev);
- return 0;
-}
-
-static void __devexit remove_one(struct pci_dev *dev)
-{
-}
-
-static const struct tty_operations ops = {
- .open = open,
- .close = close,
- .write = write,
- .put_char = put_char,
- .flush_chars = flush_chars,
- .write_room = write_room,
- .chars_in_buffer = chars_in_buffer,
- .flush_buffer = flush_buffer,
- .ioctl = ioctl,
- .compat_ioctl = slgt_compat_ioctl,
- .throttle = throttle,
- .unthrottle = unthrottle,
- .send_xchar = send_xchar,
- .break_ctl = set_break,
- .wait_until_sent = wait_until_sent,
- .set_termios = set_termios,
- .stop = tx_hold,
- .start = tx_release,
- .hangup = hangup,
- .tiocmget = tiocmget,
- .tiocmset = tiocmset,
- .get_icount = get_icount,
- .proc_fops = &synclink_gt_proc_fops,
-};
-
-static void slgt_cleanup(void)
-{
- int rc;
- struct slgt_info *info;
- struct slgt_info *tmp;
-
- printk(KERN_INFO "unload %s\n", driver_name);
-
- if (serial_driver) {
- for (info=slgt_device_list ; info != NULL ; info=info->next_device)
- tty_unregister_device(serial_driver, info->line);
- if ((rc = tty_unregister_driver(serial_driver)))
- DBGERR(("tty_unregister_driver error=%d\n", rc));
- put_tty_driver(serial_driver);
- }
-
- /* reset devices */
- info = slgt_device_list;
- while(info) {
- reset_port(info);
- info = info->next_device;
- }
-
- /* release devices */
- info = slgt_device_list;
- while(info) {
-#if SYNCLINK_GENERIC_HDLC
- hdlcdev_exit(info);
-#endif
- free_dma_bufs(info);
- free_tmp_rbuf(info);
- if (info->port_num == 0)
- release_resources(info);
- tmp = info;
- info = info->next_device;
- kfree(tmp);
- }
-
- if (pci_registered)
- pci_unregister_driver(&pci_driver);
-}
-
-/*
- * Driver initialization entry point.
- */
-static int __init slgt_init(void)
-{
- int rc;
-
- printk(KERN_INFO "%s\n", driver_name);
-
- serial_driver = alloc_tty_driver(MAX_DEVICES);
- if (!serial_driver) {
- printk("%s can't allocate tty driver\n", driver_name);
- return -ENOMEM;
- }
-
- /* Initialize the tty_driver structure */
-
- serial_driver->owner = THIS_MODULE;
- serial_driver->driver_name = tty_driver_name;
- serial_driver->name = tty_dev_prefix;
- serial_driver->major = ttymajor;
- serial_driver->minor_start = 64;
- serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
- serial_driver->subtype = SERIAL_TYPE_NORMAL;
- serial_driver->init_termios = tty_std_termios;
- serial_driver->init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- serial_driver->init_termios.c_ispeed = 9600;
- serial_driver->init_termios.c_ospeed = 9600;
- serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
- tty_set_operations(serial_driver, &ops);
- if ((rc = tty_register_driver(serial_driver)) < 0) {
- DBGERR(("%s can't register serial driver\n", driver_name));
- put_tty_driver(serial_driver);
- serial_driver = NULL;
- goto error;
- }
-
- printk(KERN_INFO "%s, tty major#%d\n",
- driver_name, serial_driver->major);
-
- slgt_device_count = 0;
- if ((rc = pci_register_driver(&pci_driver)) < 0) {
- printk("%s pci_register_driver error=%d\n", driver_name, rc);
- goto error;
- }
- pci_registered = true;
-
- if (!slgt_device_list)
- printk("%s no devices found\n",driver_name);
-
- return 0;
-
-error:
- slgt_cleanup();
- return rc;
-}
-
-static void __exit slgt_exit(void)
-{
- slgt_cleanup();
-}
-
-module_init(slgt_init);
-module_exit(slgt_exit);
-
-/*
- * register access routines
- */
-
-#define CALC_REGADDR() \
- unsigned long reg_addr = ((unsigned long)info->reg_addr) + addr; \
- if (addr >= 0x80) \
- reg_addr += (info->port_num) * 32; \
- else if (addr >= 0x40) \
- reg_addr += (info->port_num) * 16;
-
-static __u8 rd_reg8(struct slgt_info *info, unsigned int addr)
-{
- CALC_REGADDR();
- return readb((void __iomem *)reg_addr);
-}
-
-static void wr_reg8(struct slgt_info *info, unsigned int addr, __u8 value)
-{
- CALC_REGADDR();
- writeb(value, (void __iomem *)reg_addr);
-}
-
-static __u16 rd_reg16(struct slgt_info *info, unsigned int addr)
-{
- CALC_REGADDR();
- return readw((void __iomem *)reg_addr);
-}
-
-static void wr_reg16(struct slgt_info *info, unsigned int addr, __u16 value)
-{
- CALC_REGADDR();
- writew(value, (void __iomem *)reg_addr);
-}
-
-static __u32 rd_reg32(struct slgt_info *info, unsigned int addr)
-{
- CALC_REGADDR();
- return readl((void __iomem *)reg_addr);
-}
-
-static void wr_reg32(struct slgt_info *info, unsigned int addr, __u32 value)
-{
- CALC_REGADDR();
- writel(value, (void __iomem *)reg_addr);
-}
-
-static void rdma_reset(struct slgt_info *info)
-{
- unsigned int i;
-
- /* set reset bit */
- wr_reg32(info, RDCSR, BIT1);
-
- /* wait for enable bit cleared */
- for(i=0 ; i < 1000 ; i++)
- if (!(rd_reg32(info, RDCSR) & BIT0))
- break;
-}
-
-static void tdma_reset(struct slgt_info *info)
-{
- unsigned int i;
-
- /* set reset bit */
- wr_reg32(info, TDCSR, BIT1);
-
- /* wait for enable bit cleared */
- for(i=0 ; i < 1000 ; i++)
- if (!(rd_reg32(info, TDCSR) & BIT0))
- break;
-}
-
-/*
- * enable internal loopback
- * TxCLK and RxCLK are generated from BRG
- * and TxD is looped back to RxD internally.
- */
-static void enable_loopback(struct slgt_info *info)
-{
- /* SCR (serial control) BIT2=looopback enable */
- wr_reg16(info, SCR, (unsigned short)(rd_reg16(info, SCR) | BIT2));
-
- if (info->params.mode != MGSL_MODE_ASYNC) {
- /* CCR (clock control)
- * 07..05 tx clock source (010 = BRG)
- * 04..02 rx clock source (010 = BRG)
- * 01 auxclk enable (0 = disable)
- * 00 BRG enable (1 = enable)
- *
- * 0100 1001
- */
- wr_reg8(info, CCR, 0x49);
-
- /* set speed if available, otherwise use default */
- if (info->params.clock_speed)
- set_rate(info, info->params.clock_speed);
- else
- set_rate(info, 3686400);
- }
-}
-
-/*
- * set baud rate generator to specified rate
- */
-static void set_rate(struct slgt_info *info, u32 rate)
-{
- unsigned int div;
- unsigned int osc = info->base_clock;
-
- /* div = osc/rate - 1
- *
- * Round div up if osc/rate is not integer to
- * force to next slowest rate.
- */
-
- if (rate) {
- div = osc/rate;
- if (!(osc % rate) && div)
- div--;
- wr_reg16(info, BDR, (unsigned short)div);
- }
-}
-
-static void rx_stop(struct slgt_info *info)
-{
- unsigned short val;
-
- /* disable and reset receiver */
- val = rd_reg16(info, RCR) & ~BIT1; /* clear enable bit */
- wr_reg16(info, RCR, (unsigned short)(val | BIT2)); /* set reset bit */
- wr_reg16(info, RCR, val); /* clear reset bit */
-
- slgt_irq_off(info, IRQ_RXOVER + IRQ_RXDATA + IRQ_RXIDLE);
-
- /* clear pending rx interrupts */
- wr_reg16(info, SSR, IRQ_RXIDLE + IRQ_RXOVER);
-
- rdma_reset(info);
-
- info->rx_enabled = false;
- info->rx_restart = false;
-}
-
-static void rx_start(struct slgt_info *info)
-{
- unsigned short val;
-
- slgt_irq_off(info, IRQ_RXOVER + IRQ_RXDATA);
-
- /* clear pending rx overrun IRQ */
- wr_reg16(info, SSR, IRQ_RXOVER);
-
- /* reset and disable receiver */
- val = rd_reg16(info, RCR) & ~BIT1; /* clear enable bit */
- wr_reg16(info, RCR, (unsigned short)(val | BIT2)); /* set reset bit */
- wr_reg16(info, RCR, val); /* clear reset bit */
-
- rdma_reset(info);
- reset_rbufs(info);
-
- if (info->rx_pio) {
- /* rx request when rx FIFO not empty */
- wr_reg16(info, SCR, (unsigned short)(rd_reg16(info, SCR) & ~BIT14));
- slgt_irq_on(info, IRQ_RXDATA);
- if (info->params.mode == MGSL_MODE_ASYNC) {
- /* enable saving of rx status */
- wr_reg32(info, RDCSR, BIT6);
- }
- } else {
- /* rx request when rx FIFO half full */
- wr_reg16(info, SCR, (unsigned short)(rd_reg16(info, SCR) | BIT14));
- /* set 1st descriptor address */
- wr_reg32(info, RDDAR, info->rbufs[0].pdesc);
-
- if (info->params.mode != MGSL_MODE_ASYNC) {
- /* enable rx DMA and DMA interrupt */
- wr_reg32(info, RDCSR, (BIT2 + BIT0));
- } else {
- /* enable saving of rx status, rx DMA and DMA interrupt */
- wr_reg32(info, RDCSR, (BIT6 + BIT2 + BIT0));
- }
- }
-
- slgt_irq_on(info, IRQ_RXOVER);
-
- /* enable receiver */
- wr_reg16(info, RCR, (unsigned short)(rd_reg16(info, RCR) | BIT1));
-
- info->rx_restart = false;
- info->rx_enabled = true;
-}
-
-static void tx_start(struct slgt_info *info)
-{
- if (!info->tx_enabled) {
- wr_reg16(info, TCR,
- (unsigned short)((rd_reg16(info, TCR) | BIT1) & ~BIT2));
- info->tx_enabled = true;
- }
-
- if (desc_count(info->tbufs[info->tbuf_start])) {
- info->drop_rts_on_tx_done = false;
-
- if (info->params.mode != MGSL_MODE_ASYNC) {
- if (info->params.flags & HDLC_FLAG_AUTO_RTS) {
- get_signals(info);
- if (!(info->signals & SerialSignal_RTS)) {
- info->signals |= SerialSignal_RTS;
- set_signals(info);
- info->drop_rts_on_tx_done = true;
- }
- }
-
- slgt_irq_off(info, IRQ_TXDATA);
- slgt_irq_on(info, IRQ_TXUNDER + IRQ_TXIDLE);
- /* clear tx idle and underrun status bits */
- wr_reg16(info, SSR, (unsigned short)(IRQ_TXIDLE + IRQ_TXUNDER));
- } else {
- slgt_irq_off(info, IRQ_TXDATA);
- slgt_irq_on(info, IRQ_TXIDLE);
- /* clear tx idle status bit */
- wr_reg16(info, SSR, IRQ_TXIDLE);
- }
- /* set 1st descriptor address and start DMA */
- wr_reg32(info, TDDAR, info->tbufs[info->tbuf_start].pdesc);
- wr_reg32(info, TDCSR, BIT2 + BIT0);
- info->tx_active = true;
- }
-}
-
-static void tx_stop(struct slgt_info *info)
-{
- unsigned short val;
-
- del_timer(&info->tx_timer);
-
- tdma_reset(info);
-
- /* reset and disable transmitter */
- val = rd_reg16(info, TCR) & ~BIT1; /* clear enable bit */
- wr_reg16(info, TCR, (unsigned short)(val | BIT2)); /* set reset bit */
-
- slgt_irq_off(info, IRQ_TXDATA + IRQ_TXIDLE + IRQ_TXUNDER);
-
- /* clear tx idle and underrun status bit */
- wr_reg16(info, SSR, (unsigned short)(IRQ_TXIDLE + IRQ_TXUNDER));
-
- reset_tbufs(info);
-
- info->tx_enabled = false;
- info->tx_active = false;
-}
-
-static void reset_port(struct slgt_info *info)
-{
- if (!info->reg_addr)
- return;
-
- tx_stop(info);
- rx_stop(info);
-
- info->signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
- set_signals(info);
-
- slgt_irq_off(info, IRQ_ALL | IRQ_MASTER);
-}
-
-static void reset_adapter(struct slgt_info *info)
-{
- int i;
- for (i=0; i < info->port_count; ++i) {
- if (info->port_array[i])
- reset_port(info->port_array[i]);
- }
-}
-
-static void async_mode(struct slgt_info *info)
-{
- unsigned short val;
-
- slgt_irq_off(info, IRQ_ALL | IRQ_MASTER);
- tx_stop(info);
- rx_stop(info);
-
- /* TCR (tx control)
- *
- * 15..13 mode, 010=async
- * 12..10 encoding, 000=NRZ
- * 09 parity enable
- * 08 1=odd parity, 0=even parity
- * 07 1=RTS driver control
- * 06 1=break enable
- * 05..04 character length
- * 00=5 bits
- * 01=6 bits
- * 10=7 bits
- * 11=8 bits
- * 03 0=1 stop bit, 1=2 stop bits
- * 02 reset
- * 01 enable
- * 00 auto-CTS enable
- */
- val = 0x4000;
-
- if (info->if_mode & MGSL_INTERFACE_RTS_EN)
- val |= BIT7;
-
- if (info->params.parity != ASYNC_PARITY_NONE) {
- val |= BIT9;
- if (info->params.parity == ASYNC_PARITY_ODD)
- val |= BIT8;
- }
-
- switch (info->params.data_bits)
- {
- case 6: val |= BIT4; break;
- case 7: val |= BIT5; break;
- case 8: val |= BIT5 + BIT4; break;
- }
-
- if (info->params.stop_bits != 1)
- val |= BIT3;
-
- if (info->params.flags & HDLC_FLAG_AUTO_CTS)
- val |= BIT0;
-
- wr_reg16(info, TCR, val);
-
- /* RCR (rx control)
- *
- * 15..13 mode, 010=async
- * 12..10 encoding, 000=NRZ
- * 09 parity enable
- * 08 1=odd parity, 0=even parity
- * 07..06 reserved, must be 0
- * 05..04 character length
- * 00=5 bits
- * 01=6 bits
- * 10=7 bits
- * 11=8 bits
- * 03 reserved, must be zero
- * 02 reset
- * 01 enable
- * 00 auto-DCD enable
- */
- val = 0x4000;
-
- if (info->params.parity != ASYNC_PARITY_NONE) {
- val |= BIT9;
- if (info->params.parity == ASYNC_PARITY_ODD)
- val |= BIT8;
- }
-
- switch (info->params.data_bits)
- {
- case 6: val |= BIT4; break;
- case 7: val |= BIT5; break;
- case 8: val |= BIT5 + BIT4; break;
- }
-
- if (info->params.flags & HDLC_FLAG_AUTO_DCD)
- val |= BIT0;
-
- wr_reg16(info, RCR, val);
-
- /* CCR (clock control)
- *
- * 07..05 011 = tx clock source is BRG/16
- * 04..02 010 = rx clock source is BRG
- * 01 0 = auxclk disabled
- * 00 1 = BRG enabled
- *
- * 0110 1001
- */
- wr_reg8(info, CCR, 0x69);
-
- msc_set_vcr(info);
-
- /* SCR (serial control)
- *
- * 15 1=tx req on FIFO half empty
- * 14 1=rx req on FIFO half full
- * 13 tx data IRQ enable
- * 12 tx idle IRQ enable
- * 11 rx break on IRQ enable
- * 10 rx data IRQ enable
- * 09 rx break off IRQ enable
- * 08 overrun IRQ enable
- * 07 DSR IRQ enable
- * 06 CTS IRQ enable
- * 05 DCD IRQ enable
- * 04 RI IRQ enable
- * 03 0=16x sampling, 1=8x sampling
- * 02 1=txd->rxd internal loopback enable
- * 01 reserved, must be zero
- * 00 1=master IRQ enable
- */
- val = BIT15 + BIT14 + BIT0;
- /* JCR[8] : 1 = x8 async mode feature available */
- if ((rd_reg32(info, JCR) & BIT8) && info->params.data_rate &&
- ((info->base_clock < (info->params.data_rate * 16)) ||
- (info->base_clock % (info->params.data_rate * 16)))) {
- /* use 8x sampling */
- val |= BIT3;
- set_rate(info, info->params.data_rate * 8);
- } else {
- /* use 16x sampling */
- set_rate(info, info->params.data_rate * 16);
- }
- wr_reg16(info, SCR, val);
-
- slgt_irq_on(info, IRQ_RXBREAK | IRQ_RXOVER);
-
- if (info->params.loopback)
- enable_loopback(info);
-}
-
-static void sync_mode(struct slgt_info *info)
-{
- unsigned short val;
-
- slgt_irq_off(info, IRQ_ALL | IRQ_MASTER);
- tx_stop(info);
- rx_stop(info);
-
- /* TCR (tx control)
- *
- * 15..13 mode
- * 000=HDLC/SDLC
- * 001=raw bit synchronous
- * 010=asynchronous/isochronous
- * 011=monosync byte synchronous
- * 100=bisync byte synchronous
- * 101=xsync byte synchronous
- * 12..10 encoding
- * 09 CRC enable
- * 08 CRC32
- * 07 1=RTS driver control
- * 06 preamble enable
- * 05..04 preamble length
- * 03 share open/close flag
- * 02 reset
- * 01 enable
- * 00 auto-CTS enable
- */
- val = BIT2;
-
- switch(info->params.mode) {
- case MGSL_MODE_XSYNC:
- val |= BIT15 + BIT13;
- break;
- case MGSL_MODE_MONOSYNC: val |= BIT14 + BIT13; break;
- case MGSL_MODE_BISYNC: val |= BIT15; break;
- case MGSL_MODE_RAW: val |= BIT13; break;
- }
- if (info->if_mode & MGSL_INTERFACE_RTS_EN)
- val |= BIT7;
-
- switch(info->params.encoding)
- {
- case HDLC_ENCODING_NRZB: val |= BIT10; break;
- case HDLC_ENCODING_NRZI_MARK: val |= BIT11; break;
- case HDLC_ENCODING_NRZI: val |= BIT11 + BIT10; break;
- case HDLC_ENCODING_BIPHASE_MARK: val |= BIT12; break;
- case HDLC_ENCODING_BIPHASE_SPACE: val |= BIT12 + BIT10; break;
- case HDLC_ENCODING_BIPHASE_LEVEL: val |= BIT12 + BIT11; break;
- case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: val |= BIT12 + BIT11 + BIT10; break;
- }
-
- switch (info->params.crc_type & HDLC_CRC_MASK)
- {
- case HDLC_CRC_16_CCITT: val |= BIT9; break;
- case HDLC_CRC_32_CCITT: val |= BIT9 + BIT8; break;
- }
-
- if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE)
- val |= BIT6;
-
- switch (info->params.preamble_length)
- {
- case HDLC_PREAMBLE_LENGTH_16BITS: val |= BIT5; break;
- case HDLC_PREAMBLE_LENGTH_32BITS: val |= BIT4; break;
- case HDLC_PREAMBLE_LENGTH_64BITS: val |= BIT5 + BIT4; break;
- }
-
- if (info->params.flags & HDLC_FLAG_AUTO_CTS)
- val |= BIT0;
-
- wr_reg16(info, TCR, val);
-
- /* TPR (transmit preamble) */
-
- switch (info->params.preamble)
- {
- case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break;
- case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break;
- case HDLC_PREAMBLE_PATTERN_ZEROS: val = 0x00; break;
- case HDLC_PREAMBLE_PATTERN_10: val = 0x55; break;
- case HDLC_PREAMBLE_PATTERN_01: val = 0xaa; break;
- default: val = 0x7e; break;
- }
- wr_reg8(info, TPR, (unsigned char)val);
-
- /* RCR (rx control)
- *
- * 15..13 mode
- * 000=HDLC/SDLC
- * 001=raw bit synchronous
- * 010=asynchronous/isochronous
- * 011=monosync byte synchronous
- * 100=bisync byte synchronous
- * 101=xsync byte synchronous
- * 12..10 encoding
- * 09 CRC enable
- * 08 CRC32
- * 07..03 reserved, must be 0
- * 02 reset
- * 01 enable
- * 00 auto-DCD enable
- */
- val = 0;
-
- switch(info->params.mode) {
- case MGSL_MODE_XSYNC:
- val |= BIT15 + BIT13;
- break;
- case MGSL_MODE_MONOSYNC: val |= BIT14 + BIT13; break;
- case MGSL_MODE_BISYNC: val |= BIT15; break;
- case MGSL_MODE_RAW: val |= BIT13; break;
- }
-
- switch(info->params.encoding)
- {
- case HDLC_ENCODING_NRZB: val |= BIT10; break;
- case HDLC_ENCODING_NRZI_MARK: val |= BIT11; break;
- case HDLC_ENCODING_NRZI: val |= BIT11 + BIT10; break;
- case HDLC_ENCODING_BIPHASE_MARK: val |= BIT12; break;
- case HDLC_ENCODING_BIPHASE_SPACE: val |= BIT12 + BIT10; break;
- case HDLC_ENCODING_BIPHASE_LEVEL: val |= BIT12 + BIT11; break;
- case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: val |= BIT12 + BIT11 + BIT10; break;
- }
-
- switch (info->params.crc_type & HDLC_CRC_MASK)
- {
- case HDLC_CRC_16_CCITT: val |= BIT9; break;
- case HDLC_CRC_32_CCITT: val |= BIT9 + BIT8; break;
- }
-
- if (info->params.flags & HDLC_FLAG_AUTO_DCD)
- val |= BIT0;
-
- wr_reg16(info, RCR, val);
-
- /* CCR (clock control)
- *
- * 07..05 tx clock source
- * 04..02 rx clock source
- * 01 auxclk enable
- * 00 BRG enable
- */
- val = 0;
-
- if (info->params.flags & HDLC_FLAG_TXC_BRG)
- {
- // when RxC source is DPLL, BRG generates 16X DPLL
- // reference clock, so take TxC from BRG/16 to get
- // transmit clock at actual data rate
- if (info->params.flags & HDLC_FLAG_RXC_DPLL)
- val |= BIT6 + BIT5; /* 011, txclk = BRG/16 */
- else
- val |= BIT6; /* 010, txclk = BRG */
- }
- else if (info->params.flags & HDLC_FLAG_TXC_DPLL)
- val |= BIT7; /* 100, txclk = DPLL Input */
- else if (info->params.flags & HDLC_FLAG_TXC_RXCPIN)
- val |= BIT5; /* 001, txclk = RXC Input */
-
- if (info->params.flags & HDLC_FLAG_RXC_BRG)
- val |= BIT3; /* 010, rxclk = BRG */
- else if (info->params.flags & HDLC_FLAG_RXC_DPLL)
- val |= BIT4; /* 100, rxclk = DPLL */
- else if (info->params.flags & HDLC_FLAG_RXC_TXCPIN)
- val |= BIT2; /* 001, rxclk = TXC Input */
-
- if (info->params.clock_speed)
- val |= BIT1 + BIT0;
-
- wr_reg8(info, CCR, (unsigned char)val);
-
- if (info->params.flags & (HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL))
- {
- // program DPLL mode
- switch(info->params.encoding)
- {
- case HDLC_ENCODING_BIPHASE_MARK:
- case HDLC_ENCODING_BIPHASE_SPACE:
- val = BIT7; break;
- case HDLC_ENCODING_BIPHASE_LEVEL:
- case HDLC_ENCODING_DIFF_BIPHASE_LEVEL:
- val = BIT7 + BIT6; break;
- default: val = BIT6; // NRZ encodings
- }
- wr_reg16(info, RCR, (unsigned short)(rd_reg16(info, RCR) | val));
-
- // DPLL requires a 16X reference clock from BRG
- set_rate(info, info->params.clock_speed * 16);
- }
- else
- set_rate(info, info->params.clock_speed);
-
- tx_set_idle(info);
-
- msc_set_vcr(info);
-
- /* SCR (serial control)
- *
- * 15 1=tx req on FIFO half empty
- * 14 1=rx req on FIFO half full
- * 13 tx data IRQ enable
- * 12 tx idle IRQ enable
- * 11 underrun IRQ enable
- * 10 rx data IRQ enable
- * 09 rx idle IRQ enable
- * 08 overrun IRQ enable
- * 07 DSR IRQ enable
- * 06 CTS IRQ enable
- * 05 DCD IRQ enable
- * 04 RI IRQ enable
- * 03 reserved, must be zero
- * 02 1=txd->rxd internal loopback enable
- * 01 reserved, must be zero
- * 00 1=master IRQ enable
- */
- wr_reg16(info, SCR, BIT15 + BIT14 + BIT0);
-
- if (info->params.loopback)
- enable_loopback(info);
-}
-
-/*
- * set transmit idle mode
- */
-static void tx_set_idle(struct slgt_info *info)
-{
- unsigned char val;
- unsigned short tcr;
-
- /* if preamble enabled (tcr[6] == 1) then tx idle size = 8 bits
- * else tcr[5:4] = tx idle size: 00 = 8 bits, 01 = 16 bits
- */
- tcr = rd_reg16(info, TCR);
- if (info->idle_mode & HDLC_TXIDLE_CUSTOM_16) {
- /* disable preamble, set idle size to 16 bits */
- tcr = (tcr & ~(BIT6 + BIT5)) | BIT4;
- /* MSB of 16 bit idle specified in tx preamble register (TPR) */
- wr_reg8(info, TPR, (unsigned char)((info->idle_mode >> 8) & 0xff));
- } else if (!(tcr & BIT6)) {
- /* preamble is disabled, set idle size to 8 bits */
- tcr &= ~(BIT5 + BIT4);
- }
- wr_reg16(info, TCR, tcr);
-
- if (info->idle_mode & (HDLC_TXIDLE_CUSTOM_8 | HDLC_TXIDLE_CUSTOM_16)) {
- /* LSB of custom tx idle specified in tx idle register */
- val = (unsigned char)(info->idle_mode & 0xff);
- } else {
- /* standard 8 bit idle patterns */
- switch(info->idle_mode)
- {
- case HDLC_TXIDLE_FLAGS: val = 0x7e; break;
- case HDLC_TXIDLE_ALT_ZEROS_ONES:
- case HDLC_TXIDLE_ALT_MARK_SPACE: val = 0xaa; break;
- case HDLC_TXIDLE_ZEROS:
- case HDLC_TXIDLE_SPACE: val = 0x00; break;
- default: val = 0xff;
- }
- }
-
- wr_reg8(info, TIR, val);
-}
-
-/*
- * get state of V24 status (input) signals
- */
-static void get_signals(struct slgt_info *info)
-{
- unsigned short status = rd_reg16(info, SSR);
-
- /* clear all serial signals except DTR and RTS */
- info->signals &= SerialSignal_DTR + SerialSignal_RTS;
-
- if (status & BIT3)
- info->signals |= SerialSignal_DSR;
- if (status & BIT2)
- info->signals |= SerialSignal_CTS;
- if (status & BIT1)
- info->signals |= SerialSignal_DCD;
- if (status & BIT0)
- info->signals |= SerialSignal_RI;
-}
-
-/*
- * set V.24 Control Register based on current configuration
- */
-static void msc_set_vcr(struct slgt_info *info)
-{
- unsigned char val = 0;
-
- /* VCR (V.24 control)
- *
- * 07..04 serial IF select
- * 03 DTR
- * 02 RTS
- * 01 LL
- * 00 RL
- */
-
- switch(info->if_mode & MGSL_INTERFACE_MASK)
- {
- case MGSL_INTERFACE_RS232:
- val |= BIT5; /* 0010 */
- break;
- case MGSL_INTERFACE_V35:
- val |= BIT7 + BIT6 + BIT5; /* 1110 */
- break;
- case MGSL_INTERFACE_RS422:
- val |= BIT6; /* 0100 */
- break;
- }
-
- if (info->if_mode & MGSL_INTERFACE_MSB_FIRST)
- val |= BIT4;
- if (info->signals & SerialSignal_DTR)
- val |= BIT3;
- if (info->signals & SerialSignal_RTS)
- val |= BIT2;
- if (info->if_mode & MGSL_INTERFACE_LL)
- val |= BIT1;
- if (info->if_mode & MGSL_INTERFACE_RL)
- val |= BIT0;
- wr_reg8(info, VCR, val);
-}
-
-/*
- * set state of V24 control (output) signals
- */
-static void set_signals(struct slgt_info *info)
-{
- unsigned char val = rd_reg8(info, VCR);
- if (info->signals & SerialSignal_DTR)
- val |= BIT3;
- else
- val &= ~BIT3;
- if (info->signals & SerialSignal_RTS)
- val |= BIT2;
- else
- val &= ~BIT2;
- wr_reg8(info, VCR, val);
-}
-
-/*
- * free range of receive DMA buffers (i to last)
- */
-static void free_rbufs(struct slgt_info *info, unsigned int i, unsigned int last)
-{
- int done = 0;
-
- while(!done) {
- /* reset current buffer for reuse */
- info->rbufs[i].status = 0;
- set_desc_count(info->rbufs[i], info->rbuf_fill_level);
- if (i == last)
- done = 1;
- if (++i == info->rbuf_count)
- i = 0;
- }
- info->rbuf_current = i;
-}
-
-/*
- * mark all receive DMA buffers as free
- */
-static void reset_rbufs(struct slgt_info *info)
-{
- free_rbufs(info, 0, info->rbuf_count - 1);
- info->rbuf_fill_index = 0;
- info->rbuf_fill_count = 0;
-}
-
-/*
- * pass receive HDLC frame to upper layer
- *
- * return true if frame available, otherwise false
- */
-static bool rx_get_frame(struct slgt_info *info)
-{
- unsigned int start, end;
- unsigned short status;
- unsigned int framesize = 0;
- unsigned long flags;
- struct tty_struct *tty = info->port.tty;
- unsigned char addr_field = 0xff;
- unsigned int crc_size = 0;
-
- switch (info->params.crc_type & HDLC_CRC_MASK) {
- case HDLC_CRC_16_CCITT: crc_size = 2; break;
- case HDLC_CRC_32_CCITT: crc_size = 4; break;
- }
-
-check_again:
-
- framesize = 0;
- addr_field = 0xff;
- start = end = info->rbuf_current;
-
- for (;;) {
- if (!desc_complete(info->rbufs[end]))
- goto cleanup;
-
- if (framesize == 0 && info->params.addr_filter != 0xff)
- addr_field = info->rbufs[end].buf[0];
-
- framesize += desc_count(info->rbufs[end]);
-
- if (desc_eof(info->rbufs[end]))
- break;
-
- if (++end == info->rbuf_count)
- end = 0;
-
- if (end == info->rbuf_current) {
- if (info->rx_enabled){
- spin_lock_irqsave(&info->lock,flags);
- rx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
- goto cleanup;
- }
- }
-
- /* status
- *
- * 15 buffer complete
- * 14..06 reserved
- * 05..04 residue
- * 02 eof (end of frame)
- * 01 CRC error
- * 00 abort
- */
- status = desc_status(info->rbufs[end]);
-
- /* ignore CRC bit if not using CRC (bit is undefined) */
- if ((info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_NONE)
- status &= ~BIT1;
-
- if (framesize == 0 ||
- (addr_field != 0xff && addr_field != info->params.addr_filter)) {
- free_rbufs(info, start, end);
- goto check_again;
- }
-
- if (framesize < (2 + crc_size) || status & BIT0) {
- info->icount.rxshort++;
- framesize = 0;
- } else if (status & BIT1) {
- info->icount.rxcrc++;
- if (!(info->params.crc_type & HDLC_CRC_RETURN_EX))
- framesize = 0;
- }
-
-#if SYNCLINK_GENERIC_HDLC
- if (framesize == 0) {
- info->netdev->stats.rx_errors++;
- info->netdev->stats.rx_frame_errors++;
- }
-#endif
-
- DBGBH(("%s rx frame status=%04X size=%d\n",
- info->device_name, status, framesize));
- DBGDATA(info, info->rbufs[start].buf, min_t(int, framesize, info->rbuf_fill_level), "rx");
-
- if (framesize) {
- if (!(info->params.crc_type & HDLC_CRC_RETURN_EX)) {
- framesize -= crc_size;
- crc_size = 0;
- }
-
- if (framesize > info->max_frame_size + crc_size)
- info->icount.rxlong++;
- else {
- /* copy dma buffer(s) to contiguous temp buffer */
- int copy_count = framesize;
- int i = start;
- unsigned char *p = info->tmp_rbuf;
- info->tmp_rbuf_count = framesize;
-
- info->icount.rxok++;
-
- while(copy_count) {
- int partial_count = min_t(int, copy_count, info->rbuf_fill_level);
- memcpy(p, info->rbufs[i].buf, partial_count);
- p += partial_count;
- copy_count -= partial_count;
- if (++i == info->rbuf_count)
- i = 0;
- }
-
- if (info->params.crc_type & HDLC_CRC_RETURN_EX) {
- *p = (status & BIT1) ? RX_CRC_ERROR : RX_OK;
- framesize++;
- }
-
-#if SYNCLINK_GENERIC_HDLC
- if (info->netcount)
- hdlcdev_rx(info,info->tmp_rbuf, framesize);
- else
-#endif
- ldisc_receive_buf(tty, info->tmp_rbuf, info->flag_buf, framesize);
- }
- }
- free_rbufs(info, start, end);
- return true;
-
-cleanup:
- return false;
-}
-
-/*
- * pass receive buffer (RAW synchronous mode) to tty layer
- * return true if buffer available, otherwise false
- */
-static bool rx_get_buf(struct slgt_info *info)
-{
- unsigned int i = info->rbuf_current;
- unsigned int count;
-
- if (!desc_complete(info->rbufs[i]))
- return false;
- count = desc_count(info->rbufs[i]);
- switch(info->params.mode) {
- case MGSL_MODE_MONOSYNC:
- case MGSL_MODE_BISYNC:
- case MGSL_MODE_XSYNC:
- /* ignore residue in byte synchronous modes */
- if (desc_residue(info->rbufs[i]))
- count--;
- break;
- }
- DBGDATA(info, info->rbufs[i].buf, count, "rx");
- DBGINFO(("rx_get_buf size=%d\n", count));
- if (count)
- ldisc_receive_buf(info->port.tty, info->rbufs[i].buf,
- info->flag_buf, count);
- free_rbufs(info, i, i);
- return true;
-}
-
-static void reset_tbufs(struct slgt_info *info)
-{
- unsigned int i;
- info->tbuf_current = 0;
- for (i=0 ; i < info->tbuf_count ; i++) {
- info->tbufs[i].status = 0;
- info->tbufs[i].count = 0;
- }
-}
-
-/*
- * return number of free transmit DMA buffers
- */
-static unsigned int free_tbuf_count(struct slgt_info *info)
-{
- unsigned int count = 0;
- unsigned int i = info->tbuf_current;
-
- do
- {
- if (desc_count(info->tbufs[i]))
- break; /* buffer in use */
- ++count;
- if (++i == info->tbuf_count)
- i=0;
- } while (i != info->tbuf_current);
-
- /* if tx DMA active, last zero count buffer is in use */
- if (count && (rd_reg32(info, TDCSR) & BIT0))
- --count;
-
- return count;
-}
-
-/*
- * return number of bytes in unsent transmit DMA buffers
- * and the serial controller tx FIFO
- */
-static unsigned int tbuf_bytes(struct slgt_info *info)
-{
- unsigned int total_count = 0;
- unsigned int i = info->tbuf_current;
- unsigned int reg_value;
- unsigned int count;
- unsigned int active_buf_count = 0;
-
- /*
- * Add descriptor counts for all tx DMA buffers.
- * If count is zero (cleared by DMA controller after read),
- * the buffer is complete or is actively being read from.
- *
- * Record buf_count of last buffer with zero count starting
- * from current ring position. buf_count is mirror
- * copy of count and is not cleared by serial controller.
- * If DMA controller is active, that buffer is actively
- * being read so add to total.
- */
- do {
- count = desc_count(info->tbufs[i]);
- if (count)
- total_count += count;
- else if (!total_count)
- active_buf_count = info->tbufs[i].buf_count;
- if (++i == info->tbuf_count)
- i = 0;
- } while (i != info->tbuf_current);
-
- /* read tx DMA status register */
- reg_value = rd_reg32(info, TDCSR);
-
- /* if tx DMA active, last zero count buffer is in use */
- if (reg_value & BIT0)
- total_count += active_buf_count;
-
- /* add tx FIFO count = reg_value[15..8] */
- total_count += (reg_value >> 8) & 0xff;
-
- /* if transmitter active add one byte for shift register */
- if (info->tx_active)
- total_count++;
-
- return total_count;
-}
-
-/*
- * load data into transmit DMA buffer ring and start transmitter if needed
- * return true if data accepted, otherwise false (buffers full)
- */
-static bool tx_load(struct slgt_info *info, const char *buf, unsigned int size)
-{
- unsigned short count;
- unsigned int i;
- struct slgt_desc *d;
-
- /* check required buffer space */
- if (DIV_ROUND_UP(size, DMABUFSIZE) > free_tbuf_count(info))
- return false;
-
- DBGDATA(info, buf, size, "tx");
-
- /*
- * copy data to one or more DMA buffers in circular ring
- * tbuf_start = first buffer for this data
- * tbuf_current = next free buffer
- *
- * Copy all data before making data visible to DMA controller by
- * setting descriptor count of the first buffer.
- * This prevents an active DMA controller from reading the first DMA
- * buffers of a frame and stopping before the final buffers are filled.
- */
-
- info->tbuf_start = i = info->tbuf_current;
-
- while (size) {
- d = &info->tbufs[i];
-
- count = (unsigned short)((size > DMABUFSIZE) ? DMABUFSIZE : size);
- memcpy(d->buf, buf, count);
-
- size -= count;
- buf += count;
-
- /*
- * set EOF bit for last buffer of HDLC frame or
- * for every buffer in raw mode
- */
- if ((!size && info->params.mode == MGSL_MODE_HDLC) ||
- info->params.mode == MGSL_MODE_RAW)
- set_desc_eof(*d, 1);
- else
- set_desc_eof(*d, 0);
-
- /* set descriptor count for all but first buffer */
- if (i != info->tbuf_start)
- set_desc_count(*d, count);
- d->buf_count = count;
-
- if (++i == info->tbuf_count)
- i = 0;
- }
-
- info->tbuf_current = i;
-
- /* set first buffer count to make new data visible to DMA controller */
- d = &info->tbufs[info->tbuf_start];
- set_desc_count(*d, d->buf_count);
-
- /* start transmitter if needed and update transmit timeout */
- if (!info->tx_active)
- tx_start(info);
- update_tx_timer(info);
-
- return true;
-}
-
-static int register_test(struct slgt_info *info)
-{
- static unsigned short patterns[] =
- {0x0000, 0xffff, 0xaaaa, 0x5555, 0x6969, 0x9696};
- static unsigned int count = ARRAY_SIZE(patterns);
- unsigned int i;
- int rc = 0;
-
- for (i=0 ; i < count ; i++) {
- wr_reg16(info, TIR, patterns[i]);
- wr_reg16(info, BDR, patterns[(i+1)%count]);
- if ((rd_reg16(info, TIR) != patterns[i]) ||
- (rd_reg16(info, BDR) != patterns[(i+1)%count])) {
- rc = -ENODEV;
- break;
- }
- }
- info->gpio_present = (rd_reg32(info, JCR) & BIT5) ? 1 : 0;
- info->init_error = rc ? 0 : DiagStatus_AddressFailure;
- return rc;
-}
-
-static int irq_test(struct slgt_info *info)
-{
- unsigned long timeout;
- unsigned long flags;
- struct tty_struct *oldtty = info->port.tty;
- u32 speed = info->params.data_rate;
-
- info->params.data_rate = 921600;
- info->port.tty = NULL;
-
- spin_lock_irqsave(&info->lock, flags);
- async_mode(info);
- slgt_irq_on(info, IRQ_TXIDLE);
-
- /* enable transmitter */
- wr_reg16(info, TCR,
- (unsigned short)(rd_reg16(info, TCR) | BIT1));
-
- /* write one byte and wait for tx idle */
- wr_reg16(info, TDR, 0);
-
- /* assume failure */
- info->init_error = DiagStatus_IrqFailure;
- info->irq_occurred = false;
-
- spin_unlock_irqrestore(&info->lock, flags);
-
- timeout=100;
- while(timeout-- && !info->irq_occurred)
- msleep_interruptible(10);
-
- spin_lock_irqsave(&info->lock,flags);
- reset_port(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- info->params.data_rate = speed;
- info->port.tty = oldtty;
-
- info->init_error = info->irq_occurred ? 0 : DiagStatus_IrqFailure;
- return info->irq_occurred ? 0 : -ENODEV;
-}
-
-static int loopback_test_rx(struct slgt_info *info)
-{
- unsigned char *src, *dest;
- int count;
-
- if (desc_complete(info->rbufs[0])) {
- count = desc_count(info->rbufs[0]);
- src = info->rbufs[0].buf;
- dest = info->tmp_rbuf;
-
- for( ; count ; count-=2, src+=2) {
- /* src=data byte (src+1)=status byte */
- if (!(*(src+1) & (BIT9 + BIT8))) {
- *dest = *src;
- dest++;
- info->tmp_rbuf_count++;
- }
- }
- DBGDATA(info, info->tmp_rbuf, info->tmp_rbuf_count, "rx");
- return 1;
- }
- return 0;
-}
-
-static int loopback_test(struct slgt_info *info)
-{
-#define TESTFRAMESIZE 20
-
- unsigned long timeout;
- u16 count = TESTFRAMESIZE;
- unsigned char buf[TESTFRAMESIZE];
- int rc = -ENODEV;
- unsigned long flags;
-
- struct tty_struct *oldtty = info->port.tty;
- MGSL_PARAMS params;
-
- memcpy(¶ms, &info->params, sizeof(params));
-
- info->params.mode = MGSL_MODE_ASYNC;
- info->params.data_rate = 921600;
- info->params.loopback = 1;
- info->port.tty = NULL;
-
- /* build and send transmit frame */
- for (count = 0; count < TESTFRAMESIZE; ++count)
- buf[count] = (unsigned char)count;
-
- info->tmp_rbuf_count = 0;
- memset(info->tmp_rbuf, 0, TESTFRAMESIZE);
-
- /* program hardware for HDLC and enabled receiver */
- spin_lock_irqsave(&info->lock,flags);
- async_mode(info);
- rx_start(info);
- tx_load(info, buf, count);
- spin_unlock_irqrestore(&info->lock, flags);
-
- /* wait for receive complete */
- for (timeout = 100; timeout; --timeout) {
- msleep_interruptible(10);
- if (loopback_test_rx(info)) {
- rc = 0;
- break;
- }
- }
-
- /* verify received frame length and contents */
- if (!rc && (info->tmp_rbuf_count != count ||
- memcmp(buf, info->tmp_rbuf, count))) {
- rc = -ENODEV;
- }
-
- spin_lock_irqsave(&info->lock,flags);
- reset_adapter(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- memcpy(&info->params, ¶ms, sizeof(info->params));
- info->port.tty = oldtty;
-
- info->init_error = rc ? DiagStatus_DmaFailure : 0;
- return rc;
-}
-
-static int adapter_test(struct slgt_info *info)
-{
- DBGINFO(("testing %s\n", info->device_name));
- if (register_test(info) < 0) {
- printk("register test failure %s addr=%08X\n",
- info->device_name, info->phys_reg_addr);
- } else if (irq_test(info) < 0) {
- printk("IRQ test failure %s IRQ=%d\n",
- info->device_name, info->irq_level);
- } else if (loopback_test(info) < 0) {
- printk("loopback test failure %s\n", info->device_name);
- }
- return info->init_error;
-}
-
-/*
- * transmit timeout handler
- */
-static void tx_timeout(unsigned long context)
-{
- struct slgt_info *info = (struct slgt_info*)context;
- unsigned long flags;
-
- DBGINFO(("%s tx_timeout\n", info->device_name));
- if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) {
- info->icount.txtimeout++;
- }
- spin_lock_irqsave(&info->lock,flags);
- tx_stop(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
-#if SYNCLINK_GENERIC_HDLC
- if (info->netcount)
- hdlcdev_tx_done(info);
- else
-#endif
- bh_transmit(info);
-}
-
-/*
- * receive buffer polling timer
- */
-static void rx_timeout(unsigned long context)
-{
- struct slgt_info *info = (struct slgt_info*)context;
- unsigned long flags;
-
- DBGINFO(("%s rx_timeout\n", info->device_name));
- spin_lock_irqsave(&info->lock, flags);
- info->pending_bh |= BH_RECEIVE;
- spin_unlock_irqrestore(&info->lock, flags);
- bh_handler(&info->task);
-}
-
+++ /dev/null
-/*
- * $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $
- *
- * Device driver for Microgate SyncLink Multiport
- * high speed multiprotocol serial adapter.
- *
- * written by Paul Fulghum for Microgate Corporation
- * paulkf@microgate.com
- *
- * Microgate and SyncLink are trademarks of Microgate Corporation
- *
- * Derived from serial.c written by Theodore Ts'o and Linus Torvalds
- * This code is released under the GNU General Public License (GPL)
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
-#if defined(__i386__)
-# define BREAKPOINT() asm(" int $3");
-#else
-# define BREAKPOINT() { }
-#endif
-
-#define MAX_DEVICES 12
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/mm.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/netdevice.h>
-#include <linux/vmalloc.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/ioctl.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/dma.h>
-#include <linux/bitops.h>
-#include <asm/types.h>
-#include <linux/termios.h>
-#include <linux/workqueue.h>
-#include <linux/hdlc.h>
-#include <linux/synclink.h>
-
-#if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINKMP_MODULE))
-#define SYNCLINK_GENERIC_HDLC 1
-#else
-#define SYNCLINK_GENERIC_HDLC 0
-#endif
-
-#define GET_USER(error,value,addr) error = get_user(value,addr)
-#define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
-#define PUT_USER(error,value,addr) error = put_user(value,addr)
-#define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
-
-#include <asm/uaccess.h>
-
-static MGSL_PARAMS default_params = {
- MGSL_MODE_HDLC, /* unsigned long mode */
- 0, /* unsigned char loopback; */
- HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
- HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
- 0, /* unsigned long clock_speed; */
- 0xff, /* unsigned char addr_filter; */
- HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
- HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
- HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
- 9600, /* unsigned long data_rate; */
- 8, /* unsigned char data_bits; */
- 1, /* unsigned char stop_bits; */
- ASYNC_PARITY_NONE /* unsigned char parity; */
-};
-
-/* size in bytes of DMA data buffers */
-#define SCABUFSIZE 1024
-#define SCA_MEM_SIZE 0x40000
-#define SCA_BASE_SIZE 512
-#define SCA_REG_SIZE 16
-#define SCA_MAX_PORTS 4
-#define SCAMAXDESC 128
-
-#define BUFFERLISTSIZE 4096
-
-/* SCA-I style DMA buffer descriptor */
-typedef struct _SCADESC
-{
- u16 next; /* lower l6 bits of next descriptor addr */
- u16 buf_ptr; /* lower 16 bits of buffer addr */
- u8 buf_base; /* upper 8 bits of buffer addr */
- u8 pad1;
- u16 length; /* length of buffer */
- u8 status; /* status of buffer */
- u8 pad2;
-} SCADESC, *PSCADESC;
-
-typedef struct _SCADESC_EX
-{
- /* device driver bookkeeping section */
- char *virt_addr; /* virtual address of data buffer */
- u16 phys_entry; /* lower 16-bits of physical address of this descriptor */
-} SCADESC_EX, *PSCADESC_EX;
-
-/* The queue of BH actions to be performed */
-
-#define BH_RECEIVE 1
-#define BH_TRANSMIT 2
-#define BH_STATUS 4
-
-#define IO_PIN_SHUTDOWN_LIMIT 100
-
-struct _input_signal_events {
- int ri_up;
- int ri_down;
- int dsr_up;
- int dsr_down;
- int dcd_up;
- int dcd_down;
- int cts_up;
- int cts_down;
-};
-
-/*
- * Device instance data structure
- */
-typedef struct _synclinkmp_info {
- void *if_ptr; /* General purpose pointer (used by SPPP) */
- int magic;
- struct tty_port port;
- int line;
- unsigned short close_delay;
- unsigned short closing_wait; /* time to wait before closing */
-
- struct mgsl_icount icount;
-
- int timeout;
- int x_char; /* xon/xoff character */
- u16 read_status_mask1; /* break detection (SR1 indications) */
- u16 read_status_mask2; /* parity/framing/overun (SR2 indications) */
- unsigned char ignore_status_mask1; /* break detection (SR1 indications) */
- unsigned char ignore_status_mask2; /* parity/framing/overun (SR2 indications) */
- unsigned char *tx_buf;
- int tx_put;
- int tx_get;
- int tx_count;
-
- wait_queue_head_t status_event_wait_q;
- wait_queue_head_t event_wait_q;
- struct timer_list tx_timer; /* HDLC transmit timeout timer */
- struct _synclinkmp_info *next_device; /* device list link */
- struct timer_list status_timer; /* input signal status check timer */
-
- spinlock_t lock; /* spinlock for synchronizing with ISR */
- struct work_struct task; /* task structure for scheduling bh */
-
- u32 max_frame_size; /* as set by device config */
-
- u32 pending_bh;
-
- bool bh_running; /* Protection from multiple */
- int isr_overflow;
- bool bh_requested;
-
- int dcd_chkcount; /* check counts to prevent */
- int cts_chkcount; /* too many IRQs if a signal */
- int dsr_chkcount; /* is floating */
- int ri_chkcount;
-
- char *buffer_list; /* virtual address of Rx & Tx buffer lists */
- unsigned long buffer_list_phys;
-
- unsigned int rx_buf_count; /* count of total allocated Rx buffers */
- SCADESC *rx_buf_list; /* list of receive buffer entries */
- SCADESC_EX rx_buf_list_ex[SCAMAXDESC]; /* list of receive buffer entries */
- unsigned int current_rx_buf;
-
- unsigned int tx_buf_count; /* count of total allocated Tx buffers */
- SCADESC *tx_buf_list; /* list of transmit buffer entries */
- SCADESC_EX tx_buf_list_ex[SCAMAXDESC]; /* list of transmit buffer entries */
- unsigned int last_tx_buf;
-
- unsigned char *tmp_rx_buf;
- unsigned int tmp_rx_buf_count;
-
- bool rx_enabled;
- bool rx_overflow;
-
- bool tx_enabled;
- bool tx_active;
- u32 idle_mode;
-
- unsigned char ie0_value;
- unsigned char ie1_value;
- unsigned char ie2_value;
- unsigned char ctrlreg_value;
- unsigned char old_signals;
-
- char device_name[25]; /* device instance name */
-
- int port_count;
- int adapter_num;
- int port_num;
-
- struct _synclinkmp_info *port_array[SCA_MAX_PORTS];
-
- unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */
-
- unsigned int irq_level; /* interrupt level */
- unsigned long irq_flags;
- bool irq_requested; /* true if IRQ requested */
-
- MGSL_PARAMS params; /* communications parameters */
-
- unsigned char serial_signals; /* current serial signal states */
-
- bool irq_occurred; /* for diagnostics use */
- unsigned int init_error; /* Initialization startup error */
-
- u32 last_mem_alloc;
- unsigned char* memory_base; /* shared memory address (PCI only) */
- u32 phys_memory_base;
- int shared_mem_requested;
-
- unsigned char* sca_base; /* HD64570 SCA Memory address */
- u32 phys_sca_base;
- u32 sca_offset;
- bool sca_base_requested;
-
- unsigned char* lcr_base; /* local config registers (PCI only) */
- u32 phys_lcr_base;
- u32 lcr_offset;
- int lcr_mem_requested;
-
- unsigned char* statctrl_base; /* status/control register memory */
- u32 phys_statctrl_base;
- u32 statctrl_offset;
- bool sca_statctrl_requested;
-
- u32 misc_ctrl_value;
- char flag_buf[MAX_ASYNC_BUFFER_SIZE];
- char char_buf[MAX_ASYNC_BUFFER_SIZE];
- bool drop_rts_on_tx_done;
-
- struct _input_signal_events input_signal_events;
-
- /* SPPP/Cisco HDLC device parts */
- int netcount;
- spinlock_t netlock;
-
-#if SYNCLINK_GENERIC_HDLC
- struct net_device *netdev;
-#endif
-
-} SLMP_INFO;
-
-#define MGSL_MAGIC 0x5401
-
-/*
- * define serial signal status change macros
- */
-#define MISCSTATUS_DCD_LATCHED (SerialSignal_DCD<<8) /* indicates change in DCD */
-#define MISCSTATUS_RI_LATCHED (SerialSignal_RI<<8) /* indicates change in RI */
-#define MISCSTATUS_CTS_LATCHED (SerialSignal_CTS<<8) /* indicates change in CTS */
-#define MISCSTATUS_DSR_LATCHED (SerialSignal_DSR<<8) /* change in DSR */
-
-/* Common Register macros */
-#define LPR 0x00
-#define PABR0 0x02
-#define PABR1 0x03
-#define WCRL 0x04
-#define WCRM 0x05
-#define WCRH 0x06
-#define DPCR 0x08
-#define DMER 0x09
-#define ISR0 0x10
-#define ISR1 0x11
-#define ISR2 0x12
-#define IER0 0x14
-#define IER1 0x15
-#define IER2 0x16
-#define ITCR 0x18
-#define INTVR 0x1a
-#define IMVR 0x1c
-
-/* MSCI Register macros */
-#define TRB 0x20
-#define TRBL 0x20
-#define TRBH 0x21
-#define SR0 0x22
-#define SR1 0x23
-#define SR2 0x24
-#define SR3 0x25
-#define FST 0x26
-#define IE0 0x28
-#define IE1 0x29
-#define IE2 0x2a
-#define FIE 0x2b
-#define CMD 0x2c
-#define MD0 0x2e
-#define MD1 0x2f
-#define MD2 0x30
-#define CTL 0x31
-#define SA0 0x32
-#define SA1 0x33
-#define IDL 0x34
-#define TMC 0x35
-#define RXS 0x36
-#define TXS 0x37
-#define TRC0 0x38
-#define TRC1 0x39
-#define RRC 0x3a
-#define CST0 0x3c
-#define CST1 0x3d
-
-/* Timer Register Macros */
-#define TCNT 0x60
-#define TCNTL 0x60
-#define TCNTH 0x61
-#define TCONR 0x62
-#define TCONRL 0x62
-#define TCONRH 0x63
-#define TMCS 0x64
-#define TEPR 0x65
-
-/* DMA Controller Register macros */
-#define DARL 0x80
-#define DARH 0x81
-#define DARB 0x82
-#define BAR 0x80
-#define BARL 0x80
-#define BARH 0x81
-#define BARB 0x82
-#define SAR 0x84
-#define SARL 0x84
-#define SARH 0x85
-#define SARB 0x86
-#define CPB 0x86
-#define CDA 0x88
-#define CDAL 0x88
-#define CDAH 0x89
-#define EDA 0x8a
-#define EDAL 0x8a
-#define EDAH 0x8b
-#define BFL 0x8c
-#define BFLL 0x8c
-#define BFLH 0x8d
-#define BCR 0x8e
-#define BCRL 0x8e
-#define BCRH 0x8f
-#define DSR 0x90
-#define DMR 0x91
-#define FCT 0x93
-#define DIR 0x94
-#define DCMD 0x95
-
-/* combine with timer or DMA register address */
-#define TIMER0 0x00
-#define TIMER1 0x08
-#define TIMER2 0x10
-#define TIMER3 0x18
-#define RXDMA 0x00
-#define TXDMA 0x20
-
-/* SCA Command Codes */
-#define NOOP 0x00
-#define TXRESET 0x01
-#define TXENABLE 0x02
-#define TXDISABLE 0x03
-#define TXCRCINIT 0x04
-#define TXCRCEXCL 0x05
-#define TXEOM 0x06
-#define TXABORT 0x07
-#define MPON 0x08
-#define TXBUFCLR 0x09
-#define RXRESET 0x11
-#define RXENABLE 0x12
-#define RXDISABLE 0x13
-#define RXCRCINIT 0x14
-#define RXREJECT 0x15
-#define SEARCHMP 0x16
-#define RXCRCEXCL 0x17
-#define RXCRCCALC 0x18
-#define CHRESET 0x21
-#define HUNT 0x31
-
-/* DMA command codes */
-#define SWABORT 0x01
-#define FEICLEAR 0x02
-
-/* IE0 */
-#define TXINTE BIT7
-#define RXINTE BIT6
-#define TXRDYE BIT1
-#define RXRDYE BIT0
-
-/* IE1 & SR1 */
-#define UDRN BIT7
-#define IDLE BIT6
-#define SYNCD BIT4
-#define FLGD BIT4
-#define CCTS BIT3
-#define CDCD BIT2
-#define BRKD BIT1
-#define ABTD BIT1
-#define GAPD BIT1
-#define BRKE BIT0
-#define IDLD BIT0
-
-/* IE2 & SR2 */
-#define EOM BIT7
-#define PMP BIT6
-#define SHRT BIT6
-#define PE BIT5
-#define ABT BIT5
-#define FRME BIT4
-#define RBIT BIT4
-#define OVRN BIT3
-#define CRCE BIT2
-
-
-/*
- * Global linked list of SyncLink devices
- */
-static SLMP_INFO *synclinkmp_device_list = NULL;
-static int synclinkmp_adapter_count = -1;
-static int synclinkmp_device_count = 0;
-
-/*
- * Set this param to non-zero to load eax with the
- * .text section address and breakpoint on module load.
- * This is useful for use with gdb and add-symbol-file command.
- */
-static int break_on_load = 0;
-
-/*
- * Driver major number, defaults to zero to get auto
- * assigned major number. May be forced as module parameter.
- */
-static int ttymajor = 0;
-
-/*
- * Array of user specified options for ISA adapters.
- */
-static int debug_level = 0;
-static int maxframe[MAX_DEVICES] = {0,};
-
-module_param(break_on_load, bool, 0);
-module_param(ttymajor, int, 0);
-module_param(debug_level, int, 0);
-module_param_array(maxframe, int, NULL, 0);
-
-static char *driver_name = "SyncLink MultiPort driver";
-static char *driver_version = "$Revision: 4.38 $";
-
-static int synclinkmp_init_one(struct pci_dev *dev,const struct pci_device_id *ent);
-static void synclinkmp_remove_one(struct pci_dev *dev);
-
-static struct pci_device_id synclinkmp_pci_tbl[] = {
- { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_SCA, PCI_ANY_ID, PCI_ANY_ID, },
- { 0, }, /* terminate list */
-};
-MODULE_DEVICE_TABLE(pci, synclinkmp_pci_tbl);
-
-MODULE_LICENSE("GPL");
-
-static struct pci_driver synclinkmp_pci_driver = {
- .name = "synclinkmp",
- .id_table = synclinkmp_pci_tbl,
- .probe = synclinkmp_init_one,
- .remove = __devexit_p(synclinkmp_remove_one),
-};
-
-
-static struct tty_driver *serial_driver;
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS 256
-
-
-/* tty callbacks */
-
-static int open(struct tty_struct *tty, struct file * filp);
-static void close(struct tty_struct *tty, struct file * filp);
-static void hangup(struct tty_struct *tty);
-static void set_termios(struct tty_struct *tty, struct ktermios *old_termios);
-
-static int write(struct tty_struct *tty, const unsigned char *buf, int count);
-static int put_char(struct tty_struct *tty, unsigned char ch);
-static void send_xchar(struct tty_struct *tty, char ch);
-static void wait_until_sent(struct tty_struct *tty, int timeout);
-static int write_room(struct tty_struct *tty);
-static void flush_chars(struct tty_struct *tty);
-static void flush_buffer(struct tty_struct *tty);
-static void tx_hold(struct tty_struct *tty);
-static void tx_release(struct tty_struct *tty);
-
-static int ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg);
-static int chars_in_buffer(struct tty_struct *tty);
-static void throttle(struct tty_struct * tty);
-static void unthrottle(struct tty_struct * tty);
-static int set_break(struct tty_struct *tty, int break_state);
-
-#if SYNCLINK_GENERIC_HDLC
-#define dev_to_port(D) (dev_to_hdlc(D)->priv)
-static void hdlcdev_tx_done(SLMP_INFO *info);
-static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size);
-static int hdlcdev_init(SLMP_INFO *info);
-static void hdlcdev_exit(SLMP_INFO *info);
-#endif
-
-/* ioctl handlers */
-
-static int get_stats(SLMP_INFO *info, struct mgsl_icount __user *user_icount);
-static int get_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
-static int set_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
-static int get_txidle(SLMP_INFO *info, int __user *idle_mode);
-static int set_txidle(SLMP_INFO *info, int idle_mode);
-static int tx_enable(SLMP_INFO *info, int enable);
-static int tx_abort(SLMP_INFO *info);
-static int rx_enable(SLMP_INFO *info, int enable);
-static int modem_input_wait(SLMP_INFO *info,int arg);
-static int wait_mgsl_event(SLMP_INFO *info, int __user *mask_ptr);
-static int tiocmget(struct tty_struct *tty);
-static int tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear);
-static int set_break(struct tty_struct *tty, int break_state);
-
-static void add_device(SLMP_INFO *info);
-static void device_init(int adapter_num, struct pci_dev *pdev);
-static int claim_resources(SLMP_INFO *info);
-static void release_resources(SLMP_INFO *info);
-
-static int startup(SLMP_INFO *info);
-static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info);
-static int carrier_raised(struct tty_port *port);
-static void shutdown(SLMP_INFO *info);
-static void program_hw(SLMP_INFO *info);
-static void change_params(SLMP_INFO *info);
-
-static bool init_adapter(SLMP_INFO *info);
-static bool register_test(SLMP_INFO *info);
-static bool irq_test(SLMP_INFO *info);
-static bool loopback_test(SLMP_INFO *info);
-static int adapter_test(SLMP_INFO *info);
-static bool memory_test(SLMP_INFO *info);
-
-static void reset_adapter(SLMP_INFO *info);
-static void reset_port(SLMP_INFO *info);
-static void async_mode(SLMP_INFO *info);
-static void hdlc_mode(SLMP_INFO *info);
-
-static void rx_stop(SLMP_INFO *info);
-static void rx_start(SLMP_INFO *info);
-static void rx_reset_buffers(SLMP_INFO *info);
-static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last);
-static bool rx_get_frame(SLMP_INFO *info);
-
-static void tx_start(SLMP_INFO *info);
-static void tx_stop(SLMP_INFO *info);
-static void tx_load_fifo(SLMP_INFO *info);
-static void tx_set_idle(SLMP_INFO *info);
-static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count);
-
-static void get_signals(SLMP_INFO *info);
-static void set_signals(SLMP_INFO *info);
-static void enable_loopback(SLMP_INFO *info, int enable);
-static void set_rate(SLMP_INFO *info, u32 data_rate);
-
-static int bh_action(SLMP_INFO *info);
-static void bh_handler(struct work_struct *work);
-static void bh_receive(SLMP_INFO *info);
-static void bh_transmit(SLMP_INFO *info);
-static void bh_status(SLMP_INFO *info);
-static void isr_timer(SLMP_INFO *info);
-static void isr_rxint(SLMP_INFO *info);
-static void isr_rxrdy(SLMP_INFO *info);
-static void isr_txint(SLMP_INFO *info);
-static void isr_txrdy(SLMP_INFO *info);
-static void isr_rxdmaok(SLMP_INFO *info);
-static void isr_rxdmaerror(SLMP_INFO *info);
-static void isr_txdmaok(SLMP_INFO *info);
-static void isr_txdmaerror(SLMP_INFO *info);
-static void isr_io_pin(SLMP_INFO *info, u16 status);
-
-static int alloc_dma_bufs(SLMP_INFO *info);
-static void free_dma_bufs(SLMP_INFO *info);
-static int alloc_buf_list(SLMP_INFO *info);
-static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *list, SCADESC_EX *list_ex,int count);
-static int alloc_tmp_rx_buf(SLMP_INFO *info);
-static void free_tmp_rx_buf(SLMP_INFO *info);
-
-static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count);
-static void trace_block(SLMP_INFO *info, const char* data, int count, int xmit);
-static void tx_timeout(unsigned long context);
-static void status_timeout(unsigned long context);
-
-static unsigned char read_reg(SLMP_INFO *info, unsigned char addr);
-static void write_reg(SLMP_INFO *info, unsigned char addr, unsigned char val);
-static u16 read_reg16(SLMP_INFO *info, unsigned char addr);
-static void write_reg16(SLMP_INFO *info, unsigned char addr, u16 val);
-static unsigned char read_status_reg(SLMP_INFO * info);
-static void write_control_reg(SLMP_INFO * info);
-
-
-static unsigned char rx_active_fifo_level = 16; // rx request FIFO activation level in bytes
-static unsigned char tx_active_fifo_level = 16; // tx request FIFO activation level in bytes
-static unsigned char tx_negate_fifo_level = 32; // tx request FIFO negation level in bytes
-
-static u32 misc_ctrl_value = 0x007e4040;
-static u32 lcr1_brdr_value = 0x00800028;
-
-static u32 read_ahead_count = 8;
-
-/* DPCR, DMA Priority Control
- *
- * 07..05 Not used, must be 0
- * 04 BRC, bus release condition: 0=all transfers complete
- * 1=release after 1 xfer on all channels
- * 03 CCC, channel change condition: 0=every cycle
- * 1=after each channel completes all xfers
- * 02..00 PR<2..0>, priority 100=round robin
- *
- * 00000100 = 0x00
- */
-static unsigned char dma_priority = 0x04;
-
-// Number of bytes that can be written to shared RAM
-// in a single write operation
-static u32 sca_pci_load_interval = 64;
-
-/*
- * 1st function defined in .text section. Calling this function in
- * init_module() followed by a breakpoint allows a remote debugger
- * (gdb) to get the .text address for the add-symbol-file command.
- * This allows remote debugging of dynamically loadable modules.
- */
-static void* synclinkmp_get_text_ptr(void);
-static void* synclinkmp_get_text_ptr(void) {return synclinkmp_get_text_ptr;}
-
-static inline int sanity_check(SLMP_INFO *info,
- char *name, const char *routine)
-{
-#ifdef SANITY_CHECK
- static const char *badmagic =
- "Warning: bad magic number for synclinkmp_struct (%s) in %s\n";
- static const char *badinfo =
- "Warning: null synclinkmp_struct for (%s) in %s\n";
-
- if (!info) {
- printk(badinfo, name, routine);
- return 1;
- }
- if (info->magic != MGSL_MAGIC) {
- printk(badmagic, name, routine);
- return 1;
- }
-#else
- if (!info)
- return 1;
-#endif
- return 0;
-}
-
-/**
- * line discipline callback wrappers
- *
- * The wrappers maintain line discipline references
- * while calling into the line discipline.
- *
- * ldisc_receive_buf - pass receive data to line discipline
- */
-
-static void ldisc_receive_buf(struct tty_struct *tty,
- const __u8 *data, char *flags, int count)
-{
- struct tty_ldisc *ld;
- if (!tty)
- return;
- ld = tty_ldisc_ref(tty);
- if (ld) {
- if (ld->ops->receive_buf)
- ld->ops->receive_buf(tty, data, flags, count);
- tty_ldisc_deref(ld);
- }
-}
-
-/* tty callbacks */
-
-/* Called when a port is opened. Init and enable port.
- */
-static int open(struct tty_struct *tty, struct file *filp)
-{
- SLMP_INFO *info;
- int retval, line;
- unsigned long flags;
-
- line = tty->index;
- if ((line < 0) || (line >= synclinkmp_device_count)) {
- printk("%s(%d): open with invalid line #%d.\n",
- __FILE__,__LINE__,line);
- return -ENODEV;
- }
-
- info = synclinkmp_device_list;
- while(info && info->line != line)
- info = info->next_device;
- if (sanity_check(info, tty->name, "open"))
- return -ENODEV;
- if ( info->init_error ) {
- printk("%s(%d):%s device is not allocated, init error=%d\n",
- __FILE__,__LINE__,info->device_name,info->init_error);
- return -ENODEV;
- }
-
- tty->driver_data = info;
- info->port.tty = tty;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s open(), old ref count = %d\n",
- __FILE__,__LINE__,tty->driver->name, info->port.count);
-
- /* If port is closing, signal caller to try again */
- if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
- if (info->port.flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->port.close_wait);
- retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS);
- goto cleanup;
- }
-
- info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
- spin_lock_irqsave(&info->netlock, flags);
- if (info->netcount) {
- retval = -EBUSY;
- spin_unlock_irqrestore(&info->netlock, flags);
- goto cleanup;
- }
- info->port.count++;
- spin_unlock_irqrestore(&info->netlock, flags);
-
- if (info->port.count == 1) {
- /* 1st open on this device, init hardware */
- retval = startup(info);
- if (retval < 0)
- goto cleanup;
- }
-
- retval = block_til_ready(tty, filp, info);
- if (retval) {
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s block_til_ready() returned %d\n",
- __FILE__,__LINE__, info->device_name, retval);
- goto cleanup;
- }
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s open() success\n",
- __FILE__,__LINE__, info->device_name);
- retval = 0;
-
-cleanup:
- if (retval) {
- if (tty->count == 1)
- info->port.tty = NULL; /* tty layer will release tty struct */
- if(info->port.count)
- info->port.count--;
- }
-
- return retval;
-}
-
-/* Called when port is closed. Wait for remaining data to be
- * sent. Disable port and free resources.
- */
-static void close(struct tty_struct *tty, struct file *filp)
-{
- SLMP_INFO * info = tty->driver_data;
-
- if (sanity_check(info, tty->name, "close"))
- return;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s close() entry, count=%d\n",
- __FILE__,__LINE__, info->device_name, info->port.count);
-
- if (tty_port_close_start(&info->port, tty, filp) == 0)
- goto cleanup;
-
- mutex_lock(&info->port.mutex);
- if (info->port.flags & ASYNC_INITIALIZED)
- wait_until_sent(tty, info->timeout);
-
- flush_buffer(tty);
- tty_ldisc_flush(tty);
- shutdown(info);
- mutex_unlock(&info->port.mutex);
-
- tty_port_close_end(&info->port, tty);
- info->port.tty = NULL;
-cleanup:
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__,
- tty->driver->name, info->port.count);
-}
-
-/* Called by tty_hangup() when a hangup is signaled.
- * This is the same as closing all open descriptors for the port.
- */
-static void hangup(struct tty_struct *tty)
-{
- SLMP_INFO *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s hangup()\n",
- __FILE__,__LINE__, info->device_name );
-
- if (sanity_check(info, tty->name, "hangup"))
- return;
-
- mutex_lock(&info->port.mutex);
- flush_buffer(tty);
- shutdown(info);
-
- spin_lock_irqsave(&info->port.lock, flags);
- info->port.count = 0;
- info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
- info->port.tty = NULL;
- spin_unlock_irqrestore(&info->port.lock, flags);
- mutex_unlock(&info->port.mutex);
-
- wake_up_interruptible(&info->port.open_wait);
-}
-
-/* Set new termios settings
- */
-static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
-{
- SLMP_INFO *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s set_termios()\n", __FILE__,__LINE__,
- tty->driver->name );
-
- change_params(info);
-
- /* Handle transition to B0 status */
- if (old_termios->c_cflag & CBAUD &&
- !(tty->termios->c_cflag & CBAUD)) {
- info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
- spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-
- /* Handle transition away from B0 status */
- if (!(old_termios->c_cflag & CBAUD) &&
- tty->termios->c_cflag & CBAUD) {
- info->serial_signals |= SerialSignal_DTR;
- if (!(tty->termios->c_cflag & CRTSCTS) ||
- !test_bit(TTY_THROTTLED, &tty->flags)) {
- info->serial_signals |= SerialSignal_RTS;
- }
- spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-
- /* Handle turning off CRTSCTS */
- if (old_termios->c_cflag & CRTSCTS &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- tx_release(tty);
- }
-}
-
-/* Send a block of data
- *
- * Arguments:
- *
- * tty pointer to tty information structure
- * buf pointer to buffer containing send data
- * count size of send data in bytes
- *
- * Return Value: number of characters written
- */
-static int write(struct tty_struct *tty,
- const unsigned char *buf, int count)
-{
- int c, ret = 0;
- SLMP_INFO *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s write() count=%d\n",
- __FILE__,__LINE__,info->device_name,count);
-
- if (sanity_check(info, tty->name, "write"))
- goto cleanup;
-
- if (!info->tx_buf)
- goto cleanup;
-
- if (info->params.mode == MGSL_MODE_HDLC) {
- if (count > info->max_frame_size) {
- ret = -EIO;
- goto cleanup;
- }
- if (info->tx_active)
- goto cleanup;
- if (info->tx_count) {
- /* send accumulated data from send_char() calls */
- /* as frame and wait before accepting more data. */
- tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
- goto start;
- }
- ret = info->tx_count = count;
- tx_load_dma_buffer(info, buf, count);
- goto start;
- }
-
- for (;;) {
- c = min_t(int, count,
- min(info->max_frame_size - info->tx_count - 1,
- info->max_frame_size - info->tx_put));
- if (c <= 0)
- break;
-
- memcpy(info->tx_buf + info->tx_put, buf, c);
-
- spin_lock_irqsave(&info->lock,flags);
- info->tx_put += c;
- if (info->tx_put >= info->max_frame_size)
- info->tx_put -= info->max_frame_size;
- info->tx_count += c;
- spin_unlock_irqrestore(&info->lock,flags);
-
- buf += c;
- count -= c;
- ret += c;
- }
-
- if (info->params.mode == MGSL_MODE_HDLC) {
- if (count) {
- ret = info->tx_count = 0;
- goto cleanup;
- }
- tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
- }
-start:
- if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_active)
- tx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-
-cleanup:
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk( "%s(%d):%s write() returning=%d\n",
- __FILE__,__LINE__,info->device_name,ret);
- return ret;
-}
-
-/* Add a character to the transmit buffer.
- */
-static int put_char(struct tty_struct *tty, unsigned char ch)
-{
- SLMP_INFO *info = tty->driver_data;
- unsigned long flags;
- int ret = 0;
-
- if ( debug_level >= DEBUG_LEVEL_INFO ) {
- printk( "%s(%d):%s put_char(%d)\n",
- __FILE__,__LINE__,info->device_name,ch);
- }
-
- if (sanity_check(info, tty->name, "put_char"))
- return 0;
-
- if (!info->tx_buf)
- return 0;
-
- spin_lock_irqsave(&info->lock,flags);
-
- if ( (info->params.mode != MGSL_MODE_HDLC) ||
- !info->tx_active ) {
-
- if (info->tx_count < info->max_frame_size - 1) {
- info->tx_buf[info->tx_put++] = ch;
- if (info->tx_put >= info->max_frame_size)
- info->tx_put -= info->max_frame_size;
- info->tx_count++;
- ret = 1;
- }
- }
-
- spin_unlock_irqrestore(&info->lock,flags);
- return ret;
-}
-
-/* Send a high-priority XON/XOFF character
- */
-static void send_xchar(struct tty_struct *tty, char ch)
-{
- SLMP_INFO *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s send_xchar(%d)\n",
- __FILE__,__LINE__, info->device_name, ch );
-
- if (sanity_check(info, tty->name, "send_xchar"))
- return;
-
- info->x_char = ch;
- if (ch) {
- /* Make sure transmit interrupts are on */
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_enabled)
- tx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-}
-
-/* Wait until the transmitter is empty.
- */
-static void wait_until_sent(struct tty_struct *tty, int timeout)
-{
- SLMP_INFO * info = tty->driver_data;
- unsigned long orig_jiffies, char_time;
-
- if (!info )
- return;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s wait_until_sent() entry\n",
- __FILE__,__LINE__, info->device_name );
-
- if (sanity_check(info, tty->name, "wait_until_sent"))
- return;
-
- if (!test_bit(ASYNCB_INITIALIZED, &info->port.flags))
- goto exit;
-
- orig_jiffies = jiffies;
-
- /* Set check interval to 1/5 of estimated time to
- * send a character, and make it at least 1. The check
- * interval should also be less than the timeout.
- * Note: use tight timings here to satisfy the NIST-PCTS.
- */
-
- if ( info->params.data_rate ) {
- char_time = info->timeout/(32 * 5);
- if (!char_time)
- char_time++;
- } else
- char_time = 1;
-
- if (timeout)
- char_time = min_t(unsigned long, char_time, timeout);
-
- if ( info->params.mode == MGSL_MODE_HDLC ) {
- while (info->tx_active) {
- msleep_interruptible(jiffies_to_msecs(char_time));
- if (signal_pending(current))
- break;
- if (timeout && time_after(jiffies, orig_jiffies + timeout))
- break;
- }
- } else {
- /*
- * TODO: determine if there is something similar to USC16C32
- * TXSTATUS_ALL_SENT status
- */
- while ( info->tx_active && info->tx_enabled) {
- msleep_interruptible(jiffies_to_msecs(char_time));
- if (signal_pending(current))
- break;
- if (timeout && time_after(jiffies, orig_jiffies + timeout))
- break;
- }
- }
-
-exit:
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s wait_until_sent() exit\n",
- __FILE__,__LINE__, info->device_name );
-}
-
-/* Return the count of free bytes in transmit buffer
- */
-static int write_room(struct tty_struct *tty)
-{
- SLMP_INFO *info = tty->driver_data;
- int ret;
-
- if (sanity_check(info, tty->name, "write_room"))
- return 0;
-
- if (info->params.mode == MGSL_MODE_HDLC) {
- ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE;
- } else {
- ret = info->max_frame_size - info->tx_count - 1;
- if (ret < 0)
- ret = 0;
- }
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s write_room()=%d\n",
- __FILE__, __LINE__, info->device_name, ret);
-
- return ret;
-}
-
-/* enable transmitter and send remaining buffered characters
- */
-static void flush_chars(struct tty_struct *tty)
-{
- SLMP_INFO *info = tty->driver_data;
- unsigned long flags;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):%s flush_chars() entry tx_count=%d\n",
- __FILE__,__LINE__,info->device_name,info->tx_count);
-
- if (sanity_check(info, tty->name, "flush_chars"))
- return;
-
- if (info->tx_count <= 0 || tty->stopped || tty->hw_stopped ||
- !info->tx_buf)
- return;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):%s flush_chars() entry, starting transmitter\n",
- __FILE__,__LINE__,info->device_name );
-
- spin_lock_irqsave(&info->lock,flags);
-
- if (!info->tx_active) {
- if ( (info->params.mode == MGSL_MODE_HDLC) &&
- info->tx_count ) {
- /* operating in synchronous (frame oriented) mode */
- /* copy data from circular tx_buf to */
- /* transmit DMA buffer. */
- tx_load_dma_buffer(info,
- info->tx_buf,info->tx_count);
- }
- tx_start(info);
- }
-
- spin_unlock_irqrestore(&info->lock,flags);
-}
-
-/* Discard all data in the send buffer
- */
-static void flush_buffer(struct tty_struct *tty)
-{
- SLMP_INFO *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s flush_buffer() entry\n",
- __FILE__,__LINE__, info->device_name );
-
- if (sanity_check(info, tty->name, "flush_buffer"))
- return;
-
- spin_lock_irqsave(&info->lock,flags);
- info->tx_count = info->tx_put = info->tx_get = 0;
- del_timer(&info->tx_timer);
- spin_unlock_irqrestore(&info->lock,flags);
-
- tty_wakeup(tty);
-}
-
-/* throttle (stop) transmitter
- */
-static void tx_hold(struct tty_struct *tty)
-{
- SLMP_INFO *info = tty->driver_data;
- unsigned long flags;
-
- if (sanity_check(info, tty->name, "tx_hold"))
- return;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk("%s(%d):%s tx_hold()\n",
- __FILE__,__LINE__,info->device_name);
-
- spin_lock_irqsave(&info->lock,flags);
- if (info->tx_enabled)
- tx_stop(info);
- spin_unlock_irqrestore(&info->lock,flags);
-}
-
-/* release (start) transmitter
- */
-static void tx_release(struct tty_struct *tty)
-{
- SLMP_INFO *info = tty->driver_data;
- unsigned long flags;
-
- if (sanity_check(info, tty->name, "tx_release"))
- return;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk("%s(%d):%s tx_release()\n",
- __FILE__,__LINE__,info->device_name);
-
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_enabled)
- tx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
-}
-
-/* Service an IOCTL request
- *
- * Arguments:
- *
- * tty pointer to tty instance data
- * cmd IOCTL command code
- * arg command argument/context
- *
- * Return Value: 0 if success, otherwise error code
- */
-static int ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- SLMP_INFO *info = tty->driver_data;
- void __user *argp = (void __user *)arg;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s ioctl() cmd=%08X\n", __FILE__,__LINE__,
- info->device_name, cmd );
-
- if (sanity_check(info, tty->name, "ioctl"))
- return -ENODEV;
-
- if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != TIOCMIWAIT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
- }
-
- switch (cmd) {
- case MGSL_IOCGPARAMS:
- return get_params(info, argp);
- case MGSL_IOCSPARAMS:
- return set_params(info, argp);
- case MGSL_IOCGTXIDLE:
- return get_txidle(info, argp);
- case MGSL_IOCSTXIDLE:
- return set_txidle(info, (int)arg);
- case MGSL_IOCTXENABLE:
- return tx_enable(info, (int)arg);
- case MGSL_IOCRXENABLE:
- return rx_enable(info, (int)arg);
- case MGSL_IOCTXABORT:
- return tx_abort(info);
- case MGSL_IOCGSTATS:
- return get_stats(info, argp);
- case MGSL_IOCWAITEVENT:
- return wait_mgsl_event(info, argp);
- case MGSL_IOCLOOPTXDONE:
- return 0; // TODO: Not supported, need to document
- /* Wait for modem input (DCD,RI,DSR,CTS) change
- * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS)
- */
- case TIOCMIWAIT:
- return modem_input_wait(info,(int)arg);
-
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
-static int get_icount(struct tty_struct *tty,
- struct serial_icounter_struct *icount)
-{
- SLMP_INFO *info = tty->driver_data;
- struct mgsl_icount cnow; /* kernel counter temps */
- unsigned long flags;
-
- spin_lock_irqsave(&info->lock,flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->lock,flags);
-
- icount->cts = cnow.cts;
- icount->dsr = cnow.dsr;
- icount->rng = cnow.rng;
- icount->dcd = cnow.dcd;
- icount->rx = cnow.rx;
- icount->tx = cnow.tx;
- icount->frame = cnow.frame;
- icount->overrun = cnow.overrun;
- icount->parity = cnow.parity;
- icount->brk = cnow.brk;
- icount->buf_overrun = cnow.buf_overrun;
-
- return 0;
-}
-
-/*
- * /proc fs routines....
- */
-
-static inline void line_info(struct seq_file *m, SLMP_INFO *info)
-{
- char stat_buf[30];
- unsigned long flags;
-
- seq_printf(m, "%s: SCABase=%08x Mem=%08X StatusControl=%08x LCR=%08X\n"
- "\tIRQ=%d MaxFrameSize=%u\n",
- info->device_name,
- info->phys_sca_base,
- info->phys_memory_base,
- info->phys_statctrl_base,
- info->phys_lcr_base,
- info->irq_level,
- info->max_frame_size );
-
- /* output current serial signal states */
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- stat_buf[0] = 0;
- stat_buf[1] = 0;
- if (info->serial_signals & SerialSignal_RTS)
- strcat(stat_buf, "|RTS");
- if (info->serial_signals & SerialSignal_CTS)
- strcat(stat_buf, "|CTS");
- if (info->serial_signals & SerialSignal_DTR)
- strcat(stat_buf, "|DTR");
- if (info->serial_signals & SerialSignal_DSR)
- strcat(stat_buf, "|DSR");
- if (info->serial_signals & SerialSignal_DCD)
- strcat(stat_buf, "|CD");
- if (info->serial_signals & SerialSignal_RI)
- strcat(stat_buf, "|RI");
-
- if (info->params.mode == MGSL_MODE_HDLC) {
- seq_printf(m, "\tHDLC txok:%d rxok:%d",
- info->icount.txok, info->icount.rxok);
- if (info->icount.txunder)
- seq_printf(m, " txunder:%d", info->icount.txunder);
- if (info->icount.txabort)
- seq_printf(m, " txabort:%d", info->icount.txabort);
- if (info->icount.rxshort)
- seq_printf(m, " rxshort:%d", info->icount.rxshort);
- if (info->icount.rxlong)
- seq_printf(m, " rxlong:%d", info->icount.rxlong);
- if (info->icount.rxover)
- seq_printf(m, " rxover:%d", info->icount.rxover);
- if (info->icount.rxcrc)
- seq_printf(m, " rxlong:%d", info->icount.rxcrc);
- } else {
- seq_printf(m, "\tASYNC tx:%d rx:%d",
- info->icount.tx, info->icount.rx);
- if (info->icount.frame)
- seq_printf(m, " fe:%d", info->icount.frame);
- if (info->icount.parity)
- seq_printf(m, " pe:%d", info->icount.parity);
- if (info->icount.brk)
- seq_printf(m, " brk:%d", info->icount.brk);
- if (info->icount.overrun)
- seq_printf(m, " oe:%d", info->icount.overrun);
- }
-
- /* Append serial signal status to end */
- seq_printf(m, " %s\n", stat_buf+1);
-
- seq_printf(m, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
- info->tx_active,info->bh_requested,info->bh_running,
- info->pending_bh);
-}
-
-/* Called to print information about devices
- */
-static int synclinkmp_proc_show(struct seq_file *m, void *v)
-{
- SLMP_INFO *info;
-
- seq_printf(m, "synclinkmp driver:%s\n", driver_version);
-
- info = synclinkmp_device_list;
- while( info ) {
- line_info(m, info);
- info = info->next_device;
- }
- return 0;
-}
-
-static int synclinkmp_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, synclinkmp_proc_show, NULL);
-}
-
-static const struct file_operations synclinkmp_proc_fops = {
- .owner = THIS_MODULE,
- .open = synclinkmp_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-/* Return the count of bytes in transmit buffer
- */
-static int chars_in_buffer(struct tty_struct *tty)
-{
- SLMP_INFO *info = tty->driver_data;
-
- if (sanity_check(info, tty->name, "chars_in_buffer"))
- return 0;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s chars_in_buffer()=%d\n",
- __FILE__, __LINE__, info->device_name, info->tx_count);
-
- return info->tx_count;
-}
-
-/* Signal remote device to throttle send data (our receive data)
- */
-static void throttle(struct tty_struct * tty)
-{
- SLMP_INFO *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s throttle() entry\n",
- __FILE__,__LINE__, info->device_name );
-
- if (sanity_check(info, tty->name, "throttle"))
- return;
-
- if (I_IXOFF(tty))
- send_xchar(tty, STOP_CHAR(tty));
-
- if (tty->termios->c_cflag & CRTSCTS) {
- spin_lock_irqsave(&info->lock,flags);
- info->serial_signals &= ~SerialSignal_RTS;
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-}
-
-/* Signal remote device to stop throttling send data (our receive data)
- */
-static void unthrottle(struct tty_struct * tty)
-{
- SLMP_INFO *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s unthrottle() entry\n",
- __FILE__,__LINE__, info->device_name );
-
- if (sanity_check(info, tty->name, "unthrottle"))
- return;
-
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else
- send_xchar(tty, START_CHAR(tty));
- }
-
- if (tty->termios->c_cflag & CRTSCTS) {
- spin_lock_irqsave(&info->lock,flags);
- info->serial_signals |= SerialSignal_RTS;
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
-}
-
-/* set or clear transmit break condition
- * break_state -1=set break condition, 0=clear
- */
-static int set_break(struct tty_struct *tty, int break_state)
-{
- unsigned char RegValue;
- SLMP_INFO * info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s set_break(%d)\n",
- __FILE__,__LINE__, info->device_name, break_state);
-
- if (sanity_check(info, tty->name, "set_break"))
- return -EINVAL;
-
- spin_lock_irqsave(&info->lock,flags);
- RegValue = read_reg(info, CTL);
- if (break_state == -1)
- RegValue |= BIT3;
- else
- RegValue &= ~BIT3;
- write_reg(info, CTL, RegValue);
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
-}
-
-#if SYNCLINK_GENERIC_HDLC
-
-/**
- * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
- * set encoding and frame check sequence (FCS) options
- *
- * dev pointer to network device structure
- * encoding serial encoding setting
- * parity FCS setting
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
- unsigned short parity)
-{
- SLMP_INFO *info = dev_to_port(dev);
- unsigned char new_encoding;
- unsigned short new_crctype;
-
- /* return error if TTY interface open */
- if (info->port.count)
- return -EBUSY;
-
- switch (encoding)
- {
- case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
- case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
- case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
- case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
- case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
- default: return -EINVAL;
- }
-
- switch (parity)
- {
- case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
- case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
- case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
- default: return -EINVAL;
- }
-
- info->params.encoding = new_encoding;
- info->params.crc_type = new_crctype;
-
- /* if network interface up, reprogram hardware */
- if (info->netcount)
- program_hw(info);
-
- return 0;
-}
-
-/**
- * called by generic HDLC layer to send frame
- *
- * skb socket buffer containing HDLC frame
- * dev pointer to network device structure
- */
-static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- SLMP_INFO *info = dev_to_port(dev);
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
-
- /* stop sending until this frame completes */
- netif_stop_queue(dev);
-
- /* copy data to device buffers */
- info->tx_count = skb->len;
- tx_load_dma_buffer(info, skb->data, skb->len);
-
- /* update network statistics */
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += skb->len;
-
- /* done with socket buffer, so free it */
- dev_kfree_skb(skb);
-
- /* save start time for transmit timeout detection */
- dev->trans_start = jiffies;
-
- /* start hardware transmitter if necessary */
- spin_lock_irqsave(&info->lock,flags);
- if (!info->tx_active)
- tx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- return NETDEV_TX_OK;
-}
-
-/**
- * called by network layer when interface enabled
- * claim resources and initialize hardware
- *
- * dev pointer to network device structure
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_open(struct net_device *dev)
-{
- SLMP_INFO *info = dev_to_port(dev);
- int rc;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
-
- /* generic HDLC layer open processing */
- if ((rc = hdlc_open(dev)))
- return rc;
-
- /* arbitrate between network and tty opens */
- spin_lock_irqsave(&info->netlock, flags);
- if (info->port.count != 0 || info->netcount != 0) {
- printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
- spin_unlock_irqrestore(&info->netlock, flags);
- return -EBUSY;
- }
- info->netcount=1;
- spin_unlock_irqrestore(&info->netlock, flags);
-
- /* claim resources and init adapter */
- if ((rc = startup(info)) != 0) {
- spin_lock_irqsave(&info->netlock, flags);
- info->netcount=0;
- spin_unlock_irqrestore(&info->netlock, flags);
- return rc;
- }
-
- /* assert DTR and RTS, apply hardware settings */
- info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
- program_hw(info);
-
- /* enable network layer transmit */
- dev->trans_start = jiffies;
- netif_start_queue(dev);
-
- /* inform generic HDLC layer of current DCD status */
- spin_lock_irqsave(&info->lock, flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock, flags);
- if (info->serial_signals & SerialSignal_DCD)
- netif_carrier_on(dev);
- else
- netif_carrier_off(dev);
- return 0;
-}
-
-/**
- * called by network layer when interface is disabled
- * shutdown hardware and release resources
- *
- * dev pointer to network device structure
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_close(struct net_device *dev)
-{
- SLMP_INFO *info = dev_to_port(dev);
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
-
- netif_stop_queue(dev);
-
- /* shutdown adapter and release resources */
- shutdown(info);
-
- hdlc_close(dev);
-
- spin_lock_irqsave(&info->netlock, flags);
- info->netcount=0;
- spin_unlock_irqrestore(&info->netlock, flags);
-
- return 0;
-}
-
-/**
- * called by network layer to process IOCTL call to network device
- *
- * dev pointer to network device structure
- * ifr pointer to network interface request structure
- * cmd IOCTL command code
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
-{
- const size_t size = sizeof(sync_serial_settings);
- sync_serial_settings new_line;
- sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
- SLMP_INFO *info = dev_to_port(dev);
- unsigned int flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
-
- /* return error if TTY interface open */
- if (info->port.count)
- return -EBUSY;
-
- if (cmd != SIOCWANDEV)
- return hdlc_ioctl(dev, ifr, cmd);
-
- switch(ifr->ifr_settings.type) {
- case IF_GET_IFACE: /* return current sync_serial_settings */
-
- ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
- if (ifr->ifr_settings.size < size) {
- ifr->ifr_settings.size = size; /* data size wanted */
- return -ENOBUFS;
- }
-
- flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
- HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
- HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
- HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
-
- switch (flags){
- case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
- case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
- case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
- case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
- default: new_line.clock_type = CLOCK_DEFAULT;
- }
-
- new_line.clock_rate = info->params.clock_speed;
- new_line.loopback = info->params.loopback ? 1:0;
-
- if (copy_to_user(line, &new_line, size))
- return -EFAULT;
- return 0;
-
- case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
-
- if(!capable(CAP_NET_ADMIN))
- return -EPERM;
- if (copy_from_user(&new_line, line, size))
- return -EFAULT;
-
- switch (new_line.clock_type)
- {
- case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
- case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
- case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
- case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
- case CLOCK_DEFAULT: flags = info->params.flags &
- (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
- HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
- HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
- HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
- default: return -EINVAL;
- }
-
- if (new_line.loopback != 0 && new_line.loopback != 1)
- return -EINVAL;
-
- info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
- HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
- HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
- HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
- info->params.flags |= flags;
-
- info->params.loopback = new_line.loopback;
-
- if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
- info->params.clock_speed = new_line.clock_rate;
- else
- info->params.clock_speed = 0;
-
- /* if network interface up, reprogram hardware */
- if (info->netcount)
- program_hw(info);
- return 0;
-
- default:
- return hdlc_ioctl(dev, ifr, cmd);
- }
-}
-
-/**
- * called by network layer when transmit timeout is detected
- *
- * dev pointer to network device structure
- */
-static void hdlcdev_tx_timeout(struct net_device *dev)
-{
- SLMP_INFO *info = dev_to_port(dev);
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("hdlcdev_tx_timeout(%s)\n",dev->name);
-
- dev->stats.tx_errors++;
- dev->stats.tx_aborted_errors++;
-
- spin_lock_irqsave(&info->lock,flags);
- tx_stop(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- netif_wake_queue(dev);
-}
-
-/**
- * called by device driver when transmit completes
- * reenable network layer transmit if stopped
- *
- * info pointer to device instance information
- */
-static void hdlcdev_tx_done(SLMP_INFO *info)
-{
- if (netif_queue_stopped(info->netdev))
- netif_wake_queue(info->netdev);
-}
-
-/**
- * called by device driver when frame received
- * pass frame to network layer
- *
- * info pointer to device instance information
- * buf pointer to buffer contianing frame data
- * size count of data bytes in buf
- */
-static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size)
-{
- struct sk_buff *skb = dev_alloc_skb(size);
- struct net_device *dev = info->netdev;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("hdlcdev_rx(%s)\n",dev->name);
-
- if (skb == NULL) {
- printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n",
- dev->name);
- dev->stats.rx_dropped++;
- return;
- }
-
- memcpy(skb_put(skb, size), buf, size);
-
- skb->protocol = hdlc_type_trans(skb, dev);
-
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += size;
-
- netif_rx(skb);
-}
-
-static const struct net_device_ops hdlcdev_ops = {
- .ndo_open = hdlcdev_open,
- .ndo_stop = hdlcdev_close,
- .ndo_change_mtu = hdlc_change_mtu,
- .ndo_start_xmit = hdlc_start_xmit,
- .ndo_do_ioctl = hdlcdev_ioctl,
- .ndo_tx_timeout = hdlcdev_tx_timeout,
-};
-
-/**
- * called by device driver when adding device instance
- * do generic HDLC initialization
- *
- * info pointer to device instance information
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_init(SLMP_INFO *info)
-{
- int rc;
- struct net_device *dev;
- hdlc_device *hdlc;
-
- /* allocate and initialize network and HDLC layer objects */
-
- if (!(dev = alloc_hdlcdev(info))) {
- printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
- return -ENOMEM;
- }
-
- /* for network layer reporting purposes only */
- dev->mem_start = info->phys_sca_base;
- dev->mem_end = info->phys_sca_base + SCA_BASE_SIZE - 1;
- dev->irq = info->irq_level;
-
- /* network layer callbacks and settings */
- dev->netdev_ops = &hdlcdev_ops;
- dev->watchdog_timeo = 10 * HZ;
- dev->tx_queue_len = 50;
-
- /* generic HDLC layer callbacks and settings */
- hdlc = dev_to_hdlc(dev);
- hdlc->attach = hdlcdev_attach;
- hdlc->xmit = hdlcdev_xmit;
-
- /* register objects with HDLC layer */
- if ((rc = register_hdlc_device(dev))) {
- printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
- free_netdev(dev);
- return rc;
- }
-
- info->netdev = dev;
- return 0;
-}
-
-/**
- * called by device driver when removing device instance
- * do generic HDLC cleanup
- *
- * info pointer to device instance information
- */
-static void hdlcdev_exit(SLMP_INFO *info)
-{
- unregister_hdlc_device(info->netdev);
- free_netdev(info->netdev);
- info->netdev = NULL;
-}
-
-#endif /* CONFIG_HDLC */
-
-
-/* Return next bottom half action to perform.
- * Return Value: BH action code or 0 if nothing to do.
- */
-static int bh_action(SLMP_INFO *info)
-{
- unsigned long flags;
- int rc = 0;
-
- spin_lock_irqsave(&info->lock,flags);
-
- if (info->pending_bh & BH_RECEIVE) {
- info->pending_bh &= ~BH_RECEIVE;
- rc = BH_RECEIVE;
- } else if (info->pending_bh & BH_TRANSMIT) {
- info->pending_bh &= ~BH_TRANSMIT;
- rc = BH_TRANSMIT;
- } else if (info->pending_bh & BH_STATUS) {
- info->pending_bh &= ~BH_STATUS;
- rc = BH_STATUS;
- }
-
- if (!rc) {
- /* Mark BH routine as complete */
- info->bh_running = false;
- info->bh_requested = false;
- }
-
- spin_unlock_irqrestore(&info->lock,flags);
-
- return rc;
-}
-
-/* Perform bottom half processing of work items queued by ISR.
- */
-static void bh_handler(struct work_struct *work)
-{
- SLMP_INFO *info = container_of(work, SLMP_INFO, task);
- int action;
-
- if (!info)
- return;
-
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):%s bh_handler() entry\n",
- __FILE__,__LINE__,info->device_name);
-
- info->bh_running = true;
-
- while((action = bh_action(info)) != 0) {
-
- /* Process work item */
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):%s bh_handler() work item action=%d\n",
- __FILE__,__LINE__,info->device_name, action);
-
- switch (action) {
-
- case BH_RECEIVE:
- bh_receive(info);
- break;
- case BH_TRANSMIT:
- bh_transmit(info);
- break;
- case BH_STATUS:
- bh_status(info);
- break;
- default:
- /* unknown work item ID */
- printk("%s(%d):%s Unknown work item ID=%08X!\n",
- __FILE__,__LINE__,info->device_name,action);
- break;
- }
- }
-
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):%s bh_handler() exit\n",
- __FILE__,__LINE__,info->device_name);
-}
-
-static void bh_receive(SLMP_INFO *info)
-{
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):%s bh_receive()\n",
- __FILE__,__LINE__,info->device_name);
-
- while( rx_get_frame(info) );
-}
-
-static void bh_transmit(SLMP_INFO *info)
-{
- struct tty_struct *tty = info->port.tty;
-
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):%s bh_transmit() entry\n",
- __FILE__,__LINE__,info->device_name);
-
- if (tty)
- tty_wakeup(tty);
-}
-
-static void bh_status(SLMP_INFO *info)
-{
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk( "%s(%d):%s bh_status() entry\n",
- __FILE__,__LINE__,info->device_name);
-
- info->ri_chkcount = 0;
- info->dsr_chkcount = 0;
- info->dcd_chkcount = 0;
- info->cts_chkcount = 0;
-}
-
-static void isr_timer(SLMP_INFO * info)
-{
- unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
-
- /* IER2<7..4> = timer<3..0> interrupt enables (0=disabled) */
- write_reg(info, IER2, 0);
-
- /* TMCS, Timer Control/Status Register
- *
- * 07 CMF, Compare match flag (read only) 1=match
- * 06 ECMI, CMF Interrupt Enable: 0=disabled
- * 05 Reserved, must be 0
- * 04 TME, Timer Enable
- * 03..00 Reserved, must be 0
- *
- * 0000 0000
- */
- write_reg(info, (unsigned char)(timer + TMCS), 0);
-
- info->irq_occurred = true;
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s isr_timer()\n",
- __FILE__,__LINE__,info->device_name);
-}
-
-static void isr_rxint(SLMP_INFO * info)
-{
- struct tty_struct *tty = info->port.tty;
- struct mgsl_icount *icount = &info->icount;
- unsigned char status = read_reg(info, SR1) & info->ie1_value & (FLGD + IDLD + CDCD + BRKD);
- unsigned char status2 = read_reg(info, SR2) & info->ie2_value & OVRN;
-
- /* clear status bits */
- if (status)
- write_reg(info, SR1, status);
-
- if (status2)
- write_reg(info, SR2, status2);
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s isr_rxint status=%02X %02x\n",
- __FILE__,__LINE__,info->device_name,status,status2);
-
- if (info->params.mode == MGSL_MODE_ASYNC) {
- if (status & BRKD) {
- icount->brk++;
-
- /* process break detection if tty control
- * is not set to ignore it
- */
- if ( tty ) {
- if (!(status & info->ignore_status_mask1)) {
- if (info->read_status_mask1 & BRKD) {
- tty_insert_flip_char(tty, 0, TTY_BREAK);
- if (info->port.flags & ASYNC_SAK)
- do_SAK(tty);
- }
- }
- }
- }
- }
- else {
- if (status & (FLGD|IDLD)) {
- if (status & FLGD)
- info->icount.exithunt++;
- else if (status & IDLD)
- info->icount.rxidle++;
- wake_up_interruptible(&info->event_wait_q);
- }
- }
-
- if (status & CDCD) {
- /* simulate a common modem status change interrupt
- * for our handler
- */
- get_signals( info );
- isr_io_pin(info,
- MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD));
- }
-}
-
-/*
- * handle async rx data interrupts
- */
-static void isr_rxrdy(SLMP_INFO * info)
-{
- u16 status;
- unsigned char DataByte;
- struct tty_struct *tty = info->port.tty;
- struct mgsl_icount *icount = &info->icount;
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s isr_rxrdy\n",
- __FILE__,__LINE__,info->device_name);
-
- while((status = read_reg(info,CST0)) & BIT0)
- {
- int flag = 0;
- bool over = false;
- DataByte = read_reg(info,TRB);
-
- icount->rx++;
-
- if ( status & (PE + FRME + OVRN) ) {
- printk("%s(%d):%s rxerr=%04X\n",
- __FILE__,__LINE__,info->device_name,status);
-
- /* update error statistics */
- if (status & PE)
- icount->parity++;
- else if (status & FRME)
- icount->frame++;
- else if (status & OVRN)
- icount->overrun++;
-
- /* discard char if tty control flags say so */
- if (status & info->ignore_status_mask2)
- continue;
-
- status &= info->read_status_mask2;
-
- if ( tty ) {
- if (status & PE)
- flag = TTY_PARITY;
- else if (status & FRME)
- flag = TTY_FRAME;
- if (status & OVRN) {
- /* Overrun is special, since it's
- * reported immediately, and doesn't
- * affect the current character
- */
- over = true;
- }
- }
- } /* end of if (error) */
-
- if ( tty ) {
- tty_insert_flip_char(tty, DataByte, flag);
- if (over)
- tty_insert_flip_char(tty, 0, TTY_OVERRUN);
- }
- }
-
- if ( debug_level >= DEBUG_LEVEL_ISR ) {
- printk("%s(%d):%s rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
- __FILE__,__LINE__,info->device_name,
- icount->rx,icount->brk,icount->parity,
- icount->frame,icount->overrun);
- }
-
- if ( tty )
- tty_flip_buffer_push(tty);
-}
-
-static void isr_txeom(SLMP_INFO * info, unsigned char status)
-{
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s isr_txeom status=%02x\n",
- __FILE__,__LINE__,info->device_name,status);
-
- write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
- write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
- write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
-
- if (status & UDRN) {
- write_reg(info, CMD, TXRESET);
- write_reg(info, CMD, TXENABLE);
- } else
- write_reg(info, CMD, TXBUFCLR);
-
- /* disable and clear tx interrupts */
- info->ie0_value &= ~TXRDYE;
- info->ie1_value &= ~(IDLE + UDRN);
- write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
- write_reg(info, SR1, (unsigned char)(UDRN + IDLE));
-
- if ( info->tx_active ) {
- if (info->params.mode != MGSL_MODE_ASYNC) {
- if (status & UDRN)
- info->icount.txunder++;
- else if (status & IDLE)
- info->icount.txok++;
- }
-
- info->tx_active = false;
- info->tx_count = info->tx_put = info->tx_get = 0;
-
- del_timer(&info->tx_timer);
-
- if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done ) {
- info->serial_signals &= ~SerialSignal_RTS;
- info->drop_rts_on_tx_done = false;
- set_signals(info);
- }
-
-#if SYNCLINK_GENERIC_HDLC
- if (info->netcount)
- hdlcdev_tx_done(info);
- else
-#endif
- {
- if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
- tx_stop(info);
- return;
- }
- info->pending_bh |= BH_TRANSMIT;
- }
- }
-}
-
-
-/*
- * handle tx status interrupts
- */
-static void isr_txint(SLMP_INFO * info)
-{
- unsigned char status = read_reg(info, SR1) & info->ie1_value & (UDRN + IDLE + CCTS);
-
- /* clear status bits */
- write_reg(info, SR1, status);
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s isr_txint status=%02x\n",
- __FILE__,__LINE__,info->device_name,status);
-
- if (status & (UDRN + IDLE))
- isr_txeom(info, status);
-
- if (status & CCTS) {
- /* simulate a common modem status change interrupt
- * for our handler
- */
- get_signals( info );
- isr_io_pin(info,
- MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS));
-
- }
-}
-
-/*
- * handle async tx data interrupts
- */
-static void isr_txrdy(SLMP_INFO * info)
-{
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s isr_txrdy() tx_count=%d\n",
- __FILE__,__LINE__,info->device_name,info->tx_count);
-
- if (info->params.mode != MGSL_MODE_ASYNC) {
- /* disable TXRDY IRQ, enable IDLE IRQ */
- info->ie0_value &= ~TXRDYE;
- info->ie1_value |= IDLE;
- write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
- return;
- }
-
- if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
- tx_stop(info);
- return;
- }
-
- if ( info->tx_count )
- tx_load_fifo( info );
- else {
- info->tx_active = false;
- info->ie0_value &= ~TXRDYE;
- write_reg(info, IE0, info->ie0_value);
- }
-
- if (info->tx_count < WAKEUP_CHARS)
- info->pending_bh |= BH_TRANSMIT;
-}
-
-static void isr_rxdmaok(SLMP_INFO * info)
-{
- /* BIT7 = EOT (end of transfer)
- * BIT6 = EOM (end of message/frame)
- */
- unsigned char status = read_reg(info,RXDMA + DSR) & 0xc0;
-
- /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
- write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s isr_rxdmaok(), status=%02x\n",
- __FILE__,__LINE__,info->device_name,status);
-
- info->pending_bh |= BH_RECEIVE;
-}
-
-static void isr_rxdmaerror(SLMP_INFO * info)
-{
- /* BIT5 = BOF (buffer overflow)
- * BIT4 = COF (counter overflow)
- */
- unsigned char status = read_reg(info,RXDMA + DSR) & 0x30;
-
- /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
- write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s isr_rxdmaerror(), status=%02x\n",
- __FILE__,__LINE__,info->device_name,status);
-
- info->rx_overflow = true;
- info->pending_bh |= BH_RECEIVE;
-}
-
-static void isr_txdmaok(SLMP_INFO * info)
-{
- unsigned char status_reg1 = read_reg(info, SR1);
-
- write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
- write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
- write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s isr_txdmaok(), status=%02x\n",
- __FILE__,__LINE__,info->device_name,status_reg1);
-
- /* program TXRDY as FIFO empty flag, enable TXRDY IRQ */
- write_reg16(info, TRC0, 0);
- info->ie0_value |= TXRDYE;
- write_reg(info, IE0, info->ie0_value);
-}
-
-static void isr_txdmaerror(SLMP_INFO * info)
-{
- /* BIT5 = BOF (buffer overflow)
- * BIT4 = COF (counter overflow)
- */
- unsigned char status = read_reg(info,TXDMA + DSR) & 0x30;
-
- /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
- write_reg(info, TXDMA + DSR, (unsigned char)(status | 1));
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s isr_txdmaerror(), status=%02x\n",
- __FILE__,__LINE__,info->device_name,status);
-}
-
-/* handle input serial signal changes
- */
-static void isr_io_pin( SLMP_INFO *info, u16 status )
-{
- struct mgsl_icount *icount;
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):isr_io_pin status=%04X\n",
- __FILE__,__LINE__,status);
-
- if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED |
- MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) {
- icount = &info->icount;
- /* update input line counters */
- if (status & MISCSTATUS_RI_LATCHED) {
- icount->rng++;
- if ( status & SerialSignal_RI )
- info->input_signal_events.ri_up++;
- else
- info->input_signal_events.ri_down++;
- }
- if (status & MISCSTATUS_DSR_LATCHED) {
- icount->dsr++;
- if ( status & SerialSignal_DSR )
- info->input_signal_events.dsr_up++;
- else
- info->input_signal_events.dsr_down++;
- }
- if (status & MISCSTATUS_DCD_LATCHED) {
- if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
- info->ie1_value &= ~CDCD;
- write_reg(info, IE1, info->ie1_value);
- }
- icount->dcd++;
- if (status & SerialSignal_DCD) {
- info->input_signal_events.dcd_up++;
- } else
- info->input_signal_events.dcd_down++;
-#if SYNCLINK_GENERIC_HDLC
- if (info->netcount) {
- if (status & SerialSignal_DCD)
- netif_carrier_on(info->netdev);
- else
- netif_carrier_off(info->netdev);
- }
-#endif
- }
- if (status & MISCSTATUS_CTS_LATCHED)
- {
- if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
- info->ie1_value &= ~CCTS;
- write_reg(info, IE1, info->ie1_value);
- }
- icount->cts++;
- if ( status & SerialSignal_CTS )
- info->input_signal_events.cts_up++;
- else
- info->input_signal_events.cts_down++;
- }
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
-
- if ( (info->port.flags & ASYNC_CHECK_CD) &&
- (status & MISCSTATUS_DCD_LATCHED) ) {
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s CD now %s...", info->device_name,
- (status & SerialSignal_DCD) ? "on" : "off");
- if (status & SerialSignal_DCD)
- wake_up_interruptible(&info->port.open_wait);
- else {
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("doing serial hangup...");
- if (info->port.tty)
- tty_hangup(info->port.tty);
- }
- }
-
- if ( (info->port.flags & ASYNC_CTS_FLOW) &&
- (status & MISCSTATUS_CTS_LATCHED) ) {
- if ( info->port.tty ) {
- if (info->port.tty->hw_stopped) {
- if (status & SerialSignal_CTS) {
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("CTS tx start...");
- info->port.tty->hw_stopped = 0;
- tx_start(info);
- info->pending_bh |= BH_TRANSMIT;
- return;
- }
- } else {
- if (!(status & SerialSignal_CTS)) {
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("CTS tx stop...");
- info->port.tty->hw_stopped = 1;
- tx_stop(info);
- }
- }
- }
- }
- }
-
- info->pending_bh |= BH_STATUS;
-}
-
-/* Interrupt service routine entry point.
- *
- * Arguments:
- * irq interrupt number that caused interrupt
- * dev_id device ID supplied during interrupt registration
- * regs interrupted processor context
- */
-static irqreturn_t synclinkmp_interrupt(int dummy, void *dev_id)
-{
- SLMP_INFO *info = dev_id;
- unsigned char status, status0, status1=0;
- unsigned char dmastatus, dmastatus0, dmastatus1=0;
- unsigned char timerstatus0, timerstatus1=0;
- unsigned char shift;
- unsigned int i;
- unsigned short tmp;
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk(KERN_DEBUG "%s(%d): synclinkmp_interrupt(%d)entry.\n",
- __FILE__, __LINE__, info->irq_level);
-
- spin_lock(&info->lock);
-
- for(;;) {
-
- /* get status for SCA0 (ports 0-1) */
- tmp = read_reg16(info, ISR0); /* get ISR0 and ISR1 in one read */
- status0 = (unsigned char)tmp;
- dmastatus0 = (unsigned char)(tmp>>8);
- timerstatus0 = read_reg(info, ISR2);
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk(KERN_DEBUG "%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n",
- __FILE__, __LINE__, info->device_name,
- status0, dmastatus0, timerstatus0);
-
- if (info->port_count == 4) {
- /* get status for SCA1 (ports 2-3) */
- tmp = read_reg16(info->port_array[2], ISR0);
- status1 = (unsigned char)tmp;
- dmastatus1 = (unsigned char)(tmp>>8);
- timerstatus1 = read_reg(info->port_array[2], ISR2);
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s status1=%02x, dmastatus1=%02x, timerstatus1=%02x\n",
- __FILE__,__LINE__,info->device_name,
- status1,dmastatus1,timerstatus1);
- }
-
- if (!status0 && !dmastatus0 && !timerstatus0 &&
- !status1 && !dmastatus1 && !timerstatus1)
- break;
-
- for(i=0; i < info->port_count ; i++) {
- if (info->port_array[i] == NULL)
- continue;
- if (i < 2) {
- status = status0;
- dmastatus = dmastatus0;
- } else {
- status = status1;
- dmastatus = dmastatus1;
- }
-
- shift = i & 1 ? 4 :0;
-
- if (status & BIT0 << shift)
- isr_rxrdy(info->port_array[i]);
- if (status & BIT1 << shift)
- isr_txrdy(info->port_array[i]);
- if (status & BIT2 << shift)
- isr_rxint(info->port_array[i]);
- if (status & BIT3 << shift)
- isr_txint(info->port_array[i]);
-
- if (dmastatus & BIT0 << shift)
- isr_rxdmaerror(info->port_array[i]);
- if (dmastatus & BIT1 << shift)
- isr_rxdmaok(info->port_array[i]);
- if (dmastatus & BIT2 << shift)
- isr_txdmaerror(info->port_array[i]);
- if (dmastatus & BIT3 << shift)
- isr_txdmaok(info->port_array[i]);
- }
-
- if (timerstatus0 & (BIT5 | BIT4))
- isr_timer(info->port_array[0]);
- if (timerstatus0 & (BIT7 | BIT6))
- isr_timer(info->port_array[1]);
- if (timerstatus1 & (BIT5 | BIT4))
- isr_timer(info->port_array[2]);
- if (timerstatus1 & (BIT7 | BIT6))
- isr_timer(info->port_array[3]);
- }
-
- for(i=0; i < info->port_count ; i++) {
- SLMP_INFO * port = info->port_array[i];
-
- /* Request bottom half processing if there's something
- * for it to do and the bh is not already running.
- *
- * Note: startup adapter diags require interrupts.
- * do not request bottom half processing if the
- * device is not open in a normal mode.
- */
- if ( port && (port->port.count || port->netcount) &&
- port->pending_bh && !port->bh_running &&
- !port->bh_requested ) {
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk("%s(%d):%s queueing bh task.\n",
- __FILE__,__LINE__,port->device_name);
- schedule_work(&port->task);
- port->bh_requested = true;
- }
- }
-
- spin_unlock(&info->lock);
-
- if ( debug_level >= DEBUG_LEVEL_ISR )
- printk(KERN_DEBUG "%s(%d):synclinkmp_interrupt(%d)exit.\n",
- __FILE__, __LINE__, info->irq_level);
- return IRQ_HANDLED;
-}
-
-/* Initialize and start device.
- */
-static int startup(SLMP_INFO * info)
-{
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk("%s(%d):%s tx_releaseup()\n",__FILE__,__LINE__,info->device_name);
-
- if (info->port.flags & ASYNC_INITIALIZED)
- return 0;
-
- if (!info->tx_buf) {
- info->tx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
- if (!info->tx_buf) {
- printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
- __FILE__,__LINE__,info->device_name);
- return -ENOMEM;
- }
- }
-
- info->pending_bh = 0;
-
- memset(&info->icount, 0, sizeof(info->icount));
-
- /* program hardware for current parameters */
- reset_port(info);
-
- change_params(info);
-
- mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10));
-
- if (info->port.tty)
- clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
- info->port.flags |= ASYNC_INITIALIZED;
-
- return 0;
-}
-
-/* Called by close() and hangup() to shutdown hardware
- */
-static void shutdown(SLMP_INFO * info)
-{
- unsigned long flags;
-
- if (!(info->port.flags & ASYNC_INITIALIZED))
- return;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s synclinkmp_shutdown()\n",
- __FILE__,__LINE__, info->device_name );
-
- /* clear status wait queue because status changes */
- /* can't happen after shutting down the hardware */
- wake_up_interruptible(&info->status_event_wait_q);
- wake_up_interruptible(&info->event_wait_q);
-
- del_timer(&info->tx_timer);
- del_timer(&info->status_timer);
-
- kfree(info->tx_buf);
- info->tx_buf = NULL;
-
- spin_lock_irqsave(&info->lock,flags);
-
- reset_port(info);
-
- if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) {
- info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
- set_signals(info);
- }
-
- spin_unlock_irqrestore(&info->lock,flags);
-
- if (info->port.tty)
- set_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
- info->port.flags &= ~ASYNC_INITIALIZED;
-}
-
-static void program_hw(SLMP_INFO *info)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&info->lock,flags);
-
- rx_stop(info);
- tx_stop(info);
-
- info->tx_count = info->tx_put = info->tx_get = 0;
-
- if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
- hdlc_mode(info);
- else
- async_mode(info);
-
- set_signals(info);
-
- info->dcd_chkcount = 0;
- info->cts_chkcount = 0;
- info->ri_chkcount = 0;
- info->dsr_chkcount = 0;
-
- info->ie1_value |= (CDCD|CCTS);
- write_reg(info, IE1, info->ie1_value);
-
- get_signals(info);
-
- if (info->netcount || (info->port.tty && info->port.tty->termios->c_cflag & CREAD) )
- rx_start(info);
-
- spin_unlock_irqrestore(&info->lock,flags);
-}
-
-/* Reconfigure adapter based on new parameters
- */
-static void change_params(SLMP_INFO *info)
-{
- unsigned cflag;
- int bits_per_char;
-
- if (!info->port.tty || !info->port.tty->termios)
- return;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s change_params()\n",
- __FILE__,__LINE__, info->device_name );
-
- cflag = info->port.tty->termios->c_cflag;
-
- /* if B0 rate (hangup) specified then negate DTR and RTS */
- /* otherwise assert DTR and RTS */
- if (cflag & CBAUD)
- info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
- else
- info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
-
- /* byte size and parity */
-
- switch (cflag & CSIZE) {
- case CS5: info->params.data_bits = 5; break;
- case CS6: info->params.data_bits = 6; break;
- case CS7: info->params.data_bits = 7; break;
- case CS8: info->params.data_bits = 8; break;
- /* Never happens, but GCC is too dumb to figure it out */
- default: info->params.data_bits = 7; break;
- }
-
- if (cflag & CSTOPB)
- info->params.stop_bits = 2;
- else
- info->params.stop_bits = 1;
-
- info->params.parity = ASYNC_PARITY_NONE;
- if (cflag & PARENB) {
- if (cflag & PARODD)
- info->params.parity = ASYNC_PARITY_ODD;
- else
- info->params.parity = ASYNC_PARITY_EVEN;
-#ifdef CMSPAR
- if (cflag & CMSPAR)
- info->params.parity = ASYNC_PARITY_SPACE;
-#endif
- }
-
- /* calculate number of jiffies to transmit a full
- * FIFO (32 bytes) at specified data rate
- */
- bits_per_char = info->params.data_bits +
- info->params.stop_bits + 1;
-
- /* if port data rate is set to 460800 or less then
- * allow tty settings to override, otherwise keep the
- * current data rate.
- */
- if (info->params.data_rate <= 460800) {
- info->params.data_rate = tty_get_baud_rate(info->port.tty);
- }
-
- if ( info->params.data_rate ) {
- info->timeout = (32*HZ*bits_per_char) /
- info->params.data_rate;
- }
- info->timeout += HZ/50; /* Add .02 seconds of slop */
-
- if (cflag & CRTSCTS)
- info->port.flags |= ASYNC_CTS_FLOW;
- else
- info->port.flags &= ~ASYNC_CTS_FLOW;
-
- if (cflag & CLOCAL)
- info->port.flags &= ~ASYNC_CHECK_CD;
- else
- info->port.flags |= ASYNC_CHECK_CD;
-
- /* process tty input control flags */
-
- info->read_status_mask2 = OVRN;
- if (I_INPCK(info->port.tty))
- info->read_status_mask2 |= PE | FRME;
- if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
- info->read_status_mask1 |= BRKD;
- if (I_IGNPAR(info->port.tty))
- info->ignore_status_mask2 |= PE | FRME;
- if (I_IGNBRK(info->port.tty)) {
- info->ignore_status_mask1 |= BRKD;
- /* If ignoring parity and break indicators, ignore
- * overruns too. (For real raw support).
- */
- if (I_IGNPAR(info->port.tty))
- info->ignore_status_mask2 |= OVRN;
- }
-
- program_hw(info);
-}
-
-static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount)
-{
- int err;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s get_params()\n",
- __FILE__,__LINE__, info->device_name);
-
- if (!user_icount) {
- memset(&info->icount, 0, sizeof(info->icount));
- } else {
- mutex_lock(&info->port.mutex);
- COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
- mutex_unlock(&info->port.mutex);
- if (err)
- return -EFAULT;
- }
-
- return 0;
-}
-
-static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params)
-{
- int err;
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s get_params()\n",
- __FILE__,__LINE__, info->device_name);
-
- mutex_lock(&info->port.mutex);
- COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
- mutex_unlock(&info->port.mutex);
- if (err) {
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):%s get_params() user buffer copy failed\n",
- __FILE__,__LINE__,info->device_name);
- return -EFAULT;
- }
-
- return 0;
-}
-
-static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params)
-{
- unsigned long flags;
- MGSL_PARAMS tmp_params;
- int err;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s set_params\n",
- __FILE__,__LINE__,info->device_name );
- COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
- if (err) {
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):%s set_params() user buffer copy failed\n",
- __FILE__,__LINE__,info->device_name);
- return -EFAULT;
- }
-
- mutex_lock(&info->port.mutex);
- spin_lock_irqsave(&info->lock,flags);
- memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
- spin_unlock_irqrestore(&info->lock,flags);
-
- change_params(info);
- mutex_unlock(&info->port.mutex);
-
- return 0;
-}
-
-static int get_txidle(SLMP_INFO * info, int __user *idle_mode)
-{
- int err;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s get_txidle()=%d\n",
- __FILE__,__LINE__, info->device_name, info->idle_mode);
-
- COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
- if (err) {
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):%s get_txidle() user buffer copy failed\n",
- __FILE__,__LINE__,info->device_name);
- return -EFAULT;
- }
-
- return 0;
-}
-
-static int set_txidle(SLMP_INFO * info, int idle_mode)
-{
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s set_txidle(%d)\n",
- __FILE__,__LINE__,info->device_name, idle_mode );
-
- spin_lock_irqsave(&info->lock,flags);
- info->idle_mode = idle_mode;
- tx_set_idle( info );
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
-}
-
-static int tx_enable(SLMP_INFO * info, int enable)
-{
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s tx_enable(%d)\n",
- __FILE__,__LINE__,info->device_name, enable);
-
- spin_lock_irqsave(&info->lock,flags);
- if ( enable ) {
- if ( !info->tx_enabled ) {
- tx_start(info);
- }
- } else {
- if ( info->tx_enabled )
- tx_stop(info);
- }
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
-}
-
-/* abort send HDLC frame
- */
-static int tx_abort(SLMP_INFO * info)
-{
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s tx_abort()\n",
- __FILE__,__LINE__,info->device_name);
-
- spin_lock_irqsave(&info->lock,flags);
- if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) {
- info->ie1_value &= ~UDRN;
- info->ie1_value |= IDLE;
- write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
- write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
-
- write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
- write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
-
- write_reg(info, CMD, TXABORT);
- }
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
-}
-
-static int rx_enable(SLMP_INFO * info, int enable)
-{
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s rx_enable(%d)\n",
- __FILE__,__LINE__,info->device_name,enable);
-
- spin_lock_irqsave(&info->lock,flags);
- if ( enable ) {
- if ( !info->rx_enabled )
- rx_start(info);
- } else {
- if ( info->rx_enabled )
- rx_stop(info);
- }
- spin_unlock_irqrestore(&info->lock,flags);
- return 0;
-}
-
-/* wait for specified event to occur
- */
-static int wait_mgsl_event(SLMP_INFO * info, int __user *mask_ptr)
-{
- unsigned long flags;
- int s;
- int rc=0;
- struct mgsl_icount cprev, cnow;
- int events;
- int mask;
- struct _input_signal_events oldsigs, newsigs;
- DECLARE_WAITQUEUE(wait, current);
-
- COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
- if (rc) {
- return -EFAULT;
- }
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s wait_mgsl_event(%d)\n",
- __FILE__,__LINE__,info->device_name,mask);
-
- spin_lock_irqsave(&info->lock,flags);
-
- /* return immediately if state matches requested events */
- get_signals(info);
- s = info->serial_signals;
-
- events = mask &
- ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
- ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
- ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
- ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
- if (events) {
- spin_unlock_irqrestore(&info->lock,flags);
- goto exit;
- }
-
- /* save current irq counts */
- cprev = info->icount;
- oldsigs = info->input_signal_events;
-
- /* enable hunt and idle irqs if needed */
- if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) {
- unsigned char oldval = info->ie1_value;
- unsigned char newval = oldval +
- (mask & MgslEvent_ExitHuntMode ? FLGD:0) +
- (mask & MgslEvent_IdleReceived ? IDLD:0);
- if ( oldval != newval ) {
- info->ie1_value = newval;
- write_reg(info, IE1, info->ie1_value);
- }
- }
-
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&info->event_wait_q, &wait);
-
- spin_unlock_irqrestore(&info->lock,flags);
-
- for(;;) {
- schedule();
- if (signal_pending(current)) {
- rc = -ERESTARTSYS;
- break;
- }
-
- /* get current irq counts */
- spin_lock_irqsave(&info->lock,flags);
- cnow = info->icount;
- newsigs = info->input_signal_events;
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->lock,flags);
-
- /* if no change, wait aborted for some reason */
- if (newsigs.dsr_up == oldsigs.dsr_up &&
- newsigs.dsr_down == oldsigs.dsr_down &&
- newsigs.dcd_up == oldsigs.dcd_up &&
- newsigs.dcd_down == oldsigs.dcd_down &&
- newsigs.cts_up == oldsigs.cts_up &&
- newsigs.cts_down == oldsigs.cts_down &&
- newsigs.ri_up == oldsigs.ri_up &&
- newsigs.ri_down == oldsigs.ri_down &&
- cnow.exithunt == cprev.exithunt &&
- cnow.rxidle == cprev.rxidle) {
- rc = -EIO;
- break;
- }
-
- events = mask &
- ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
- (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
- (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
- (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
- (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
- (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
- (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
- (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
- (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
- (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
- if (events)
- break;
-
- cprev = cnow;
- oldsigs = newsigs;
- }
-
- remove_wait_queue(&info->event_wait_q, &wait);
- set_current_state(TASK_RUNNING);
-
-
- if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
- spin_lock_irqsave(&info->lock,flags);
- if (!waitqueue_active(&info->event_wait_q)) {
- /* disable enable exit hunt mode/idle rcvd IRQs */
- info->ie1_value &= ~(FLGD|IDLD);
- write_reg(info, IE1, info->ie1_value);
- }
- spin_unlock_irqrestore(&info->lock,flags);
- }
-exit:
- if ( rc == 0 )
- PUT_USER(rc, events, mask_ptr);
-
- return rc;
-}
-
-static int modem_input_wait(SLMP_INFO *info,int arg)
-{
- unsigned long flags;
- int rc;
- struct mgsl_icount cprev, cnow;
- DECLARE_WAITQUEUE(wait, current);
-
- /* save current irq counts */
- spin_lock_irqsave(&info->lock,flags);
- cprev = info->icount;
- add_wait_queue(&info->status_event_wait_q, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->lock,flags);
-
- for(;;) {
- schedule();
- if (signal_pending(current)) {
- rc = -ERESTARTSYS;
- break;
- }
-
- /* get new irq counts */
- spin_lock_irqsave(&info->lock,flags);
- cnow = info->icount;
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&info->lock,flags);
-
- /* if no change, wait aborted for some reason */
- if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
- cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
- rc = -EIO;
- break;
- }
-
- /* check for change in caller specified modem input */
- if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
- (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
- (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
- (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
- rc = 0;
- break;
- }
-
- cprev = cnow;
- }
- remove_wait_queue(&info->status_event_wait_q, &wait);
- set_current_state(TASK_RUNNING);
- return rc;
-}
-
-/* return the state of the serial control and status signals
- */
-static int tiocmget(struct tty_struct *tty)
-{
- SLMP_INFO *info = tty->driver_data;
- unsigned int result;
- unsigned long flags;
-
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
- ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
- ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
- ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
- ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
- ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s tiocmget() value=%08X\n",
- __FILE__,__LINE__, info->device_name, result );
- return result;
-}
-
-/* set modem control signals (DTR/RTS)
- */
-static int tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- SLMP_INFO *info = tty->driver_data;
- unsigned long flags;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s tiocmset(%x,%x)\n",
- __FILE__,__LINE__,info->device_name, set, clear);
-
- if (set & TIOCM_RTS)
- info->serial_signals |= SerialSignal_RTS;
- if (set & TIOCM_DTR)
- info->serial_signals |= SerialSignal_DTR;
- if (clear & TIOCM_RTS)
- info->serial_signals &= ~SerialSignal_RTS;
- if (clear & TIOCM_DTR)
- info->serial_signals &= ~SerialSignal_DTR;
-
- spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- return 0;
-}
-
-static int carrier_raised(struct tty_port *port)
-{
- SLMP_INFO *info = container_of(port, SLMP_INFO, port);
- unsigned long flags;
-
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
-}
-
-static void dtr_rts(struct tty_port *port, int on)
-{
- SLMP_INFO *info = container_of(port, SLMP_INFO, port);
- unsigned long flags;
-
- spin_lock_irqsave(&info->lock,flags);
- if (on)
- info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
- else
- info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
-}
-
-/* Block the current process until the specified port is ready to open.
- */
-static int block_til_ready(struct tty_struct *tty, struct file *filp,
- SLMP_INFO *info)
-{
- DECLARE_WAITQUEUE(wait, current);
- int retval;
- bool do_clocal = false;
- bool extra_count = false;
- unsigned long flags;
- int cd;
- struct tty_port *port = &info->port;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s block_til_ready()\n",
- __FILE__,__LINE__, tty->driver->name );
-
- if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
- /* nonblock mode is set or port is not enabled */
- /* just verify that callout device is not active */
- port->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
- }
-
- if (tty->termios->c_cflag & CLOCAL)
- do_clocal = true;
-
- /* Wait for carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, port->count is dropped by one, so that
- * close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
-
- retval = 0;
- add_wait_queue(&port->open_wait, &wait);
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s block_til_ready() before block, count=%d\n",
- __FILE__,__LINE__, tty->driver->name, port->count );
-
- spin_lock_irqsave(&info->lock, flags);
- if (!tty_hung_up_p(filp)) {
- extra_count = true;
- port->count--;
- }
- spin_unlock_irqrestore(&info->lock, flags);
- port->blocked_open++;
-
- while (1) {
- if (tty->termios->c_cflag & CBAUD)
- tty_port_raise_dtr_rts(port);
-
- set_current_state(TASK_INTERRUPTIBLE);
-
- if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
- retval = (port->flags & ASYNC_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS;
- break;
- }
-
- cd = tty_port_carrier_raised(port);
-
- if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd))
- break;
-
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s block_til_ready() count=%d\n",
- __FILE__,__LINE__, tty->driver->name, port->count );
-
- tty_unlock();
- schedule();
- tty_lock();
- }
-
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&port->open_wait, &wait);
-
- if (extra_count)
- port->count++;
- port->blocked_open--;
-
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s block_til_ready() after, count=%d\n",
- __FILE__,__LINE__, tty->driver->name, port->count );
-
- if (!retval)
- port->flags |= ASYNC_NORMAL_ACTIVE;
-
- return retval;
-}
-
-static int alloc_dma_bufs(SLMP_INFO *info)
-{
- unsigned short BuffersPerFrame;
- unsigned short BufferCount;
-
- // Force allocation to start at 64K boundary for each port.
- // This is necessary because *all* buffer descriptors for a port
- // *must* be in the same 64K block. All descriptors on a port
- // share a common 'base' address (upper 8 bits of 24 bits) programmed
- // into the CBP register.
- info->port_array[0]->last_mem_alloc = (SCA_MEM_SIZE/4) * info->port_num;
-
- /* Calculate the number of DMA buffers necessary to hold the */
- /* largest allowable frame size. Note: If the max frame size is */
- /* not an even multiple of the DMA buffer size then we need to */
- /* round the buffer count per frame up one. */
-
- BuffersPerFrame = (unsigned short)(info->max_frame_size/SCABUFSIZE);
- if ( info->max_frame_size % SCABUFSIZE )
- BuffersPerFrame++;
-
- /* calculate total number of data buffers (SCABUFSIZE) possible
- * in one ports memory (SCA_MEM_SIZE/4) after allocating memory
- * for the descriptor list (BUFFERLISTSIZE).
- */
- BufferCount = (SCA_MEM_SIZE/4 - BUFFERLISTSIZE)/SCABUFSIZE;
-
- /* limit number of buffers to maximum amount of descriptors */
- if (BufferCount > BUFFERLISTSIZE/sizeof(SCADESC))
- BufferCount = BUFFERLISTSIZE/sizeof(SCADESC);
-
- /* use enough buffers to transmit one max size frame */
- info->tx_buf_count = BuffersPerFrame + 1;
-
- /* never use more than half the available buffers for transmit */
- if (info->tx_buf_count > (BufferCount/2))
- info->tx_buf_count = BufferCount/2;
-
- if (info->tx_buf_count > SCAMAXDESC)
- info->tx_buf_count = SCAMAXDESC;
-
- /* use remaining buffers for receive */
- info->rx_buf_count = BufferCount - info->tx_buf_count;
-
- if (info->rx_buf_count > SCAMAXDESC)
- info->rx_buf_count = SCAMAXDESC;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk("%s(%d):%s Allocating %d TX and %d RX DMA buffers.\n",
- __FILE__,__LINE__, info->device_name,
- info->tx_buf_count,info->rx_buf_count);
-
- if ( alloc_buf_list( info ) < 0 ||
- alloc_frame_bufs(info,
- info->rx_buf_list,
- info->rx_buf_list_ex,
- info->rx_buf_count) < 0 ||
- alloc_frame_bufs(info,
- info->tx_buf_list,
- info->tx_buf_list_ex,
- info->tx_buf_count) < 0 ||
- alloc_tmp_rx_buf(info) < 0 ) {
- printk("%s(%d):%s Can't allocate DMA buffer memory\n",
- __FILE__,__LINE__, info->device_name);
- return -ENOMEM;
- }
-
- rx_reset_buffers( info );
-
- return 0;
-}
-
-/* Allocate DMA buffers for the transmit and receive descriptor lists.
- */
-static int alloc_buf_list(SLMP_INFO *info)
-{
- unsigned int i;
-
- /* build list in adapter shared memory */
- info->buffer_list = info->memory_base + info->port_array[0]->last_mem_alloc;
- info->buffer_list_phys = info->port_array[0]->last_mem_alloc;
- info->port_array[0]->last_mem_alloc += BUFFERLISTSIZE;
-
- memset(info->buffer_list, 0, BUFFERLISTSIZE);
-
- /* Save virtual address pointers to the receive and */
- /* transmit buffer lists. (Receive 1st). These pointers will */
- /* be used by the processor to access the lists. */
- info->rx_buf_list = (SCADESC *)info->buffer_list;
-
- info->tx_buf_list = (SCADESC *)info->buffer_list;
- info->tx_buf_list += info->rx_buf_count;
-
- /* Build links for circular buffer entry lists (tx and rx)
- *
- * Note: links are physical addresses read by the SCA device
- * to determine the next buffer entry to use.
- */
-
- for ( i = 0; i < info->rx_buf_count; i++ ) {
- /* calculate and store physical address of this buffer entry */
- info->rx_buf_list_ex[i].phys_entry =
- info->buffer_list_phys + (i * sizeof(SCABUFSIZE));
-
- /* calculate and store physical address of */
- /* next entry in cirular list of entries */
- info->rx_buf_list[i].next = info->buffer_list_phys;
- if ( i < info->rx_buf_count - 1 )
- info->rx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
-
- info->rx_buf_list[i].length = SCABUFSIZE;
- }
-
- for ( i = 0; i < info->tx_buf_count; i++ ) {
- /* calculate and store physical address of this buffer entry */
- info->tx_buf_list_ex[i].phys_entry = info->buffer_list_phys +
- ((info->rx_buf_count + i) * sizeof(SCADESC));
-
- /* calculate and store physical address of */
- /* next entry in cirular list of entries */
-
- info->tx_buf_list[i].next = info->buffer_list_phys +
- info->rx_buf_count * sizeof(SCADESC);
-
- if ( i < info->tx_buf_count - 1 )
- info->tx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
- }
-
- return 0;
-}
-
-/* Allocate the frame DMA buffers used by the specified buffer list.
- */
-static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *buf_list,SCADESC_EX *buf_list_ex,int count)
-{
- int i;
- unsigned long phys_addr;
-
- for ( i = 0; i < count; i++ ) {
- buf_list_ex[i].virt_addr = info->memory_base + info->port_array[0]->last_mem_alloc;
- phys_addr = info->port_array[0]->last_mem_alloc;
- info->port_array[0]->last_mem_alloc += SCABUFSIZE;
-
- buf_list[i].buf_ptr = (unsigned short)phys_addr;
- buf_list[i].buf_base = (unsigned char)(phys_addr >> 16);
- }
-
- return 0;
-}
-
-static void free_dma_bufs(SLMP_INFO *info)
-{
- info->buffer_list = NULL;
- info->rx_buf_list = NULL;
- info->tx_buf_list = NULL;
-}
-
-/* allocate buffer large enough to hold max_frame_size.
- * This buffer is used to pass an assembled frame to the line discipline.
- */
-static int alloc_tmp_rx_buf(SLMP_INFO *info)
-{
- info->tmp_rx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
- if (info->tmp_rx_buf == NULL)
- return -ENOMEM;
- return 0;
-}
-
-static void free_tmp_rx_buf(SLMP_INFO *info)
-{
- kfree(info->tmp_rx_buf);
- info->tmp_rx_buf = NULL;
-}
-
-static int claim_resources(SLMP_INFO *info)
-{
- if (request_mem_region(info->phys_memory_base,SCA_MEM_SIZE,"synclinkmp") == NULL) {
- printk( "%s(%d):%s mem addr conflict, Addr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_memory_base);
- info->init_error = DiagStatus_AddressConflict;
- goto errout;
- }
- else
- info->shared_mem_requested = true;
-
- if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclinkmp") == NULL) {
- printk( "%s(%d):%s lcr mem addr conflict, Addr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_lcr_base);
- info->init_error = DiagStatus_AddressConflict;
- goto errout;
- }
- else
- info->lcr_mem_requested = true;
-
- if (request_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE,"synclinkmp") == NULL) {
- printk( "%s(%d):%s sca mem addr conflict, Addr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_sca_base);
- info->init_error = DiagStatus_AddressConflict;
- goto errout;
- }
- else
- info->sca_base_requested = true;
-
- if (request_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE,"synclinkmp") == NULL) {
- printk( "%s(%d):%s stat/ctrl mem addr conflict, Addr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_statctrl_base);
- info->init_error = DiagStatus_AddressConflict;
- goto errout;
- }
- else
- info->sca_statctrl_requested = true;
-
- info->memory_base = ioremap_nocache(info->phys_memory_base,
- SCA_MEM_SIZE);
- if (!info->memory_base) {
- printk( "%s(%d):%s Cant map shared memory, MemAddr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_memory_base );
- info->init_error = DiagStatus_CantAssignPciResources;
- goto errout;
- }
-
- info->lcr_base = ioremap_nocache(info->phys_lcr_base, PAGE_SIZE);
- if (!info->lcr_base) {
- printk( "%s(%d):%s Cant map LCR memory, MemAddr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_lcr_base );
- info->init_error = DiagStatus_CantAssignPciResources;
- goto errout;
- }
- info->lcr_base += info->lcr_offset;
-
- info->sca_base = ioremap_nocache(info->phys_sca_base, PAGE_SIZE);
- if (!info->sca_base) {
- printk( "%s(%d):%s Cant map SCA memory, MemAddr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_sca_base );
- info->init_error = DiagStatus_CantAssignPciResources;
- goto errout;
- }
- info->sca_base += info->sca_offset;
-
- info->statctrl_base = ioremap_nocache(info->phys_statctrl_base,
- PAGE_SIZE);
- if (!info->statctrl_base) {
- printk( "%s(%d):%s Cant map SCA Status/Control memory, MemAddr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_statctrl_base );
- info->init_error = DiagStatus_CantAssignPciResources;
- goto errout;
- }
- info->statctrl_base += info->statctrl_offset;
-
- if ( !memory_test(info) ) {
- printk( "%s(%d):Shared Memory Test failed for device %s MemAddr=%08X\n",
- __FILE__,__LINE__,info->device_name, info->phys_memory_base );
- info->init_error = DiagStatus_MemoryError;
- goto errout;
- }
-
- return 0;
-
-errout:
- release_resources( info );
- return -ENODEV;
-}
-
-static void release_resources(SLMP_INFO *info)
-{
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):%s release_resources() entry\n",
- __FILE__,__LINE__,info->device_name );
-
- if ( info->irq_requested ) {
- free_irq(info->irq_level, info);
- info->irq_requested = false;
- }
-
- if ( info->shared_mem_requested ) {
- release_mem_region(info->phys_memory_base,SCA_MEM_SIZE);
- info->shared_mem_requested = false;
- }
- if ( info->lcr_mem_requested ) {
- release_mem_region(info->phys_lcr_base + info->lcr_offset,128);
- info->lcr_mem_requested = false;
- }
- if ( info->sca_base_requested ) {
- release_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE);
- info->sca_base_requested = false;
- }
- if ( info->sca_statctrl_requested ) {
- release_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE);
- info->sca_statctrl_requested = false;
- }
-
- if (info->memory_base){
- iounmap(info->memory_base);
- info->memory_base = NULL;
- }
-
- if (info->sca_base) {
- iounmap(info->sca_base - info->sca_offset);
- info->sca_base=NULL;
- }
-
- if (info->statctrl_base) {
- iounmap(info->statctrl_base - info->statctrl_offset);
- info->statctrl_base=NULL;
- }
-
- if (info->lcr_base){
- iounmap(info->lcr_base - info->lcr_offset);
- info->lcr_base = NULL;
- }
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):%s release_resources() exit\n",
- __FILE__,__LINE__,info->device_name );
-}
-
-/* Add the specified device instance data structure to the
- * global linked list of devices and increment the device count.
- */
-static void add_device(SLMP_INFO *info)
-{
- info->next_device = NULL;
- info->line = synclinkmp_device_count;
- sprintf(info->device_name,"ttySLM%dp%d",info->adapter_num,info->port_num);
-
- if (info->line < MAX_DEVICES) {
- if (maxframe[info->line])
- info->max_frame_size = maxframe[info->line];
- }
-
- synclinkmp_device_count++;
-
- if ( !synclinkmp_device_list )
- synclinkmp_device_list = info;
- else {
- SLMP_INFO *current_dev = synclinkmp_device_list;
- while( current_dev->next_device )
- current_dev = current_dev->next_device;
- current_dev->next_device = info;
- }
-
- if ( info->max_frame_size < 4096 )
- info->max_frame_size = 4096;
- else if ( info->max_frame_size > 65535 )
- info->max_frame_size = 65535;
-
- printk( "SyncLink MultiPort %s: "
- "Mem=(%08x %08X %08x %08X) IRQ=%d MaxFrameSize=%u\n",
- info->device_name,
- info->phys_sca_base,
- info->phys_memory_base,
- info->phys_statctrl_base,
- info->phys_lcr_base,
- info->irq_level,
- info->max_frame_size );
-
-#if SYNCLINK_GENERIC_HDLC
- hdlcdev_init(info);
-#endif
-}
-
-static const struct tty_port_operations port_ops = {
- .carrier_raised = carrier_raised,
- .dtr_rts = dtr_rts,
-};
-
-/* Allocate and initialize a device instance structure
- *
- * Return Value: pointer to SLMP_INFO if success, otherwise NULL
- */
-static SLMP_INFO *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev)
-{
- SLMP_INFO *info;
-
- info = kzalloc(sizeof(SLMP_INFO),
- GFP_KERNEL);
-
- if (!info) {
- printk("%s(%d) Error can't allocate device instance data for adapter %d, port %d\n",
- __FILE__,__LINE__, adapter_num, port_num);
- } else {
- tty_port_init(&info->port);
- info->port.ops = &port_ops;
- info->magic = MGSL_MAGIC;
- INIT_WORK(&info->task, bh_handler);
- info->max_frame_size = 4096;
- info->port.close_delay = 5*HZ/10;
- info->port.closing_wait = 30*HZ;
- init_waitqueue_head(&info->status_event_wait_q);
- init_waitqueue_head(&info->event_wait_q);
- spin_lock_init(&info->netlock);
- memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
- info->idle_mode = HDLC_TXIDLE_FLAGS;
- info->adapter_num = adapter_num;
- info->port_num = port_num;
-
- /* Copy configuration info to device instance data */
- info->irq_level = pdev->irq;
- info->phys_lcr_base = pci_resource_start(pdev,0);
- info->phys_sca_base = pci_resource_start(pdev,2);
- info->phys_memory_base = pci_resource_start(pdev,3);
- info->phys_statctrl_base = pci_resource_start(pdev,4);
-
- /* Because veremap only works on page boundaries we must map
- * a larger area than is actually implemented for the LCR
- * memory range. We map a full page starting at the page boundary.
- */
- info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1);
- info->phys_lcr_base &= ~(PAGE_SIZE-1);
-
- info->sca_offset = info->phys_sca_base & (PAGE_SIZE-1);
- info->phys_sca_base &= ~(PAGE_SIZE-1);
-
- info->statctrl_offset = info->phys_statctrl_base & (PAGE_SIZE-1);
- info->phys_statctrl_base &= ~(PAGE_SIZE-1);
-
- info->bus_type = MGSL_BUS_TYPE_PCI;
- info->irq_flags = IRQF_SHARED;
-
- setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info);
- setup_timer(&info->status_timer, status_timeout,
- (unsigned long)info);
-
- /* Store the PCI9050 misc control register value because a flaw
- * in the PCI9050 prevents LCR registers from being read if
- * BIOS assigns an LCR base address with bit 7 set.
- *
- * Only the misc control register is accessed for which only
- * write access is needed, so set an initial value and change
- * bits to the device instance data as we write the value
- * to the actual misc control register.
- */
- info->misc_ctrl_value = 0x087e4546;
-
- /* initial port state is unknown - if startup errors
- * occur, init_error will be set to indicate the
- * problem. Once the port is fully initialized,
- * this value will be set to 0 to indicate the
- * port is available.
- */
- info->init_error = -1;
- }
-
- return info;
-}
-
-static void device_init(int adapter_num, struct pci_dev *pdev)
-{
- SLMP_INFO *port_array[SCA_MAX_PORTS];
- int port;
-
- /* allocate device instances for up to SCA_MAX_PORTS devices */
- for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
- port_array[port] = alloc_dev(adapter_num,port,pdev);
- if( port_array[port] == NULL ) {
- for ( --port; port >= 0; --port )
- kfree(port_array[port]);
- return;
- }
- }
-
- /* give copy of port_array to all ports and add to device list */
- for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
- memcpy(port_array[port]->port_array,port_array,sizeof(port_array));
- add_device( port_array[port] );
- spin_lock_init(&port_array[port]->lock);
- }
-
- /* Allocate and claim adapter resources */
- if ( !claim_resources(port_array[0]) ) {
-
- alloc_dma_bufs(port_array[0]);
-
- /* copy resource information from first port to others */
- for ( port = 1; port < SCA_MAX_PORTS; ++port ) {
- port_array[port]->lock = port_array[0]->lock;
- port_array[port]->irq_level = port_array[0]->irq_level;
- port_array[port]->memory_base = port_array[0]->memory_base;
- port_array[port]->sca_base = port_array[0]->sca_base;
- port_array[port]->statctrl_base = port_array[0]->statctrl_base;
- port_array[port]->lcr_base = port_array[0]->lcr_base;
- alloc_dma_bufs(port_array[port]);
- }
-
- if ( request_irq(port_array[0]->irq_level,
- synclinkmp_interrupt,
- port_array[0]->irq_flags,
- port_array[0]->device_name,
- port_array[0]) < 0 ) {
- printk( "%s(%d):%s Cant request interrupt, IRQ=%d\n",
- __FILE__,__LINE__,
- port_array[0]->device_name,
- port_array[0]->irq_level );
- }
- else {
- port_array[0]->irq_requested = true;
- adapter_test(port_array[0]);
- }
- }
-}
-
-static const struct tty_operations ops = {
- .open = open,
- .close = close,
- .write = write,
- .put_char = put_char,
- .flush_chars = flush_chars,
- .write_room = write_room,
- .chars_in_buffer = chars_in_buffer,
- .flush_buffer = flush_buffer,
- .ioctl = ioctl,
- .throttle = throttle,
- .unthrottle = unthrottle,
- .send_xchar = send_xchar,
- .break_ctl = set_break,
- .wait_until_sent = wait_until_sent,
- .set_termios = set_termios,
- .stop = tx_hold,
- .start = tx_release,
- .hangup = hangup,
- .tiocmget = tiocmget,
- .tiocmset = tiocmset,
- .get_icount = get_icount,
- .proc_fops = &synclinkmp_proc_fops,
-};
-
-
-static void synclinkmp_cleanup(void)
-{
- int rc;
- SLMP_INFO *info;
- SLMP_INFO *tmp;
-
- printk("Unloading %s %s\n", driver_name, driver_version);
-
- if (serial_driver) {
- if ((rc = tty_unregister_driver(serial_driver)))
- printk("%s(%d) failed to unregister tty driver err=%d\n",
- __FILE__,__LINE__,rc);
- put_tty_driver(serial_driver);
- }
-
- /* reset devices */
- info = synclinkmp_device_list;
- while(info) {
- reset_port(info);
- info = info->next_device;
- }
-
- /* release devices */
- info = synclinkmp_device_list;
- while(info) {
-#if SYNCLINK_GENERIC_HDLC
- hdlcdev_exit(info);
-#endif
- free_dma_bufs(info);
- free_tmp_rx_buf(info);
- if ( info->port_num == 0 ) {
- if (info->sca_base)
- write_reg(info, LPR, 1); /* set low power mode */
- release_resources(info);
- }
- tmp = info;
- info = info->next_device;
- kfree(tmp);
- }
-
- pci_unregister_driver(&synclinkmp_pci_driver);
-}
-
-/* Driver initialization entry point.
- */
-
-static int __init synclinkmp_init(void)
-{
- int rc;
-
- if (break_on_load) {
- synclinkmp_get_text_ptr();
- BREAKPOINT();
- }
-
- printk("%s %s\n", driver_name, driver_version);
-
- if ((rc = pci_register_driver(&synclinkmp_pci_driver)) < 0) {
- printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc);
- return rc;
- }
-
- serial_driver = alloc_tty_driver(128);
- if (!serial_driver) {
- rc = -ENOMEM;
- goto error;
- }
-
- /* Initialize the tty_driver structure */
-
- serial_driver->owner = THIS_MODULE;
- serial_driver->driver_name = "synclinkmp";
- serial_driver->name = "ttySLM";
- serial_driver->major = ttymajor;
- serial_driver->minor_start = 64;
- serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
- serial_driver->subtype = SERIAL_TYPE_NORMAL;
- serial_driver->init_termios = tty_std_termios;
- serial_driver->init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- serial_driver->init_termios.c_ispeed = 9600;
- serial_driver->init_termios.c_ospeed = 9600;
- serial_driver->flags = TTY_DRIVER_REAL_RAW;
- tty_set_operations(serial_driver, &ops);
- if ((rc = tty_register_driver(serial_driver)) < 0) {
- printk("%s(%d):Couldn't register serial driver\n",
- __FILE__,__LINE__);
- put_tty_driver(serial_driver);
- serial_driver = NULL;
- goto error;
- }
-
- printk("%s %s, tty major#%d\n",
- driver_name, driver_version,
- serial_driver->major);
-
- return 0;
-
-error:
- synclinkmp_cleanup();
- return rc;
-}
-
-static void __exit synclinkmp_exit(void)
-{
- synclinkmp_cleanup();
-}
-
-module_init(synclinkmp_init);
-module_exit(synclinkmp_exit);
-
-/* Set the port for internal loopback mode.
- * The TxCLK and RxCLK signals are generated from the BRG and
- * the TxD is looped back to the RxD internally.
- */
-static void enable_loopback(SLMP_INFO *info, int enable)
-{
- if (enable) {
- /* MD2 (Mode Register 2)
- * 01..00 CNCT<1..0> Channel Connection 11=Local Loopback
- */
- write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) | (BIT1 + BIT0)));
-
- /* degate external TxC clock source */
- info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
- write_control_reg(info);
-
- /* RXS/TXS (Rx/Tx clock source)
- * 07 Reserved, must be 0
- * 06..04 Clock Source, 100=BRG
- * 03..00 Clock Divisor, 0000=1
- */
- write_reg(info, RXS, 0x40);
- write_reg(info, TXS, 0x40);
-
- } else {
- /* MD2 (Mode Register 2)
- * 01..00 CNCT<1..0> Channel connection, 0=normal
- */
- write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) & ~(BIT1 + BIT0)));
-
- /* RXS/TXS (Rx/Tx clock source)
- * 07 Reserved, must be 0
- * 06..04 Clock Source, 000=RxC/TxC Pin
- * 03..00 Clock Divisor, 0000=1
- */
- write_reg(info, RXS, 0x00);
- write_reg(info, TXS, 0x00);
- }
-
- /* set LinkSpeed if available, otherwise default to 2Mbps */
- if (info->params.clock_speed)
- set_rate(info, info->params.clock_speed);
- else
- set_rate(info, 3686400);
-}
-
-/* Set the baud rate register to the desired speed
- *
- * data_rate data rate of clock in bits per second
- * A data rate of 0 disables the AUX clock.
- */
-static void set_rate( SLMP_INFO *info, u32 data_rate )
-{
- u32 TMCValue;
- unsigned char BRValue;
- u32 Divisor=0;
-
- /* fBRG = fCLK/(TMC * 2^BR)
- */
- if (data_rate != 0) {
- Divisor = 14745600/data_rate;
- if (!Divisor)
- Divisor = 1;
-
- TMCValue = Divisor;
-
- BRValue = 0;
- if (TMCValue != 1 && TMCValue != 2) {
- /* BRValue of 0 provides 50/50 duty cycle *only* when
- * TMCValue is 1 or 2. BRValue of 1 to 9 always provides
- * 50/50 duty cycle.
- */
- BRValue = 1;
- TMCValue >>= 1;
- }
-
- /* while TMCValue is too big for TMC register, divide
- * by 2 and increment BR exponent.
- */
- for(; TMCValue > 256 && BRValue < 10; BRValue++)
- TMCValue >>= 1;
-
- write_reg(info, TXS,
- (unsigned char)((read_reg(info, TXS) & 0xf0) | BRValue));
- write_reg(info, RXS,
- (unsigned char)((read_reg(info, RXS) & 0xf0) | BRValue));
- write_reg(info, TMC, (unsigned char)TMCValue);
- }
- else {
- write_reg(info, TXS,0);
- write_reg(info, RXS,0);
- write_reg(info, TMC, 0);
- }
-}
-
-/* Disable receiver
- */
-static void rx_stop(SLMP_INFO *info)
-{
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):%s rx_stop()\n",
- __FILE__,__LINE__, info->device_name );
-
- write_reg(info, CMD, RXRESET);
-
- info->ie0_value &= ~RXRDYE;
- write_reg(info, IE0, info->ie0_value); /* disable Rx data interrupts */
-
- write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
- write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
- write_reg(info, RXDMA + DIR, 0); /* disable Rx DMA interrupts */
-
- info->rx_enabled = false;
- info->rx_overflow = false;
-}
-
-/* enable the receiver
- */
-static void rx_start(SLMP_INFO *info)
-{
- int i;
-
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):%s rx_start()\n",
- __FILE__,__LINE__, info->device_name );
-
- write_reg(info, CMD, RXRESET);
-
- if ( info->params.mode == MGSL_MODE_HDLC ) {
- /* HDLC, disabe IRQ on rxdata */
- info->ie0_value &= ~RXRDYE;
- write_reg(info, IE0, info->ie0_value);
-
- /* Reset all Rx DMA buffers and program rx dma */
- write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
- write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
-
- for (i = 0; i < info->rx_buf_count; i++) {
- info->rx_buf_list[i].status = 0xff;
-
- // throttle to 4 shared memory writes at a time to prevent
- // hogging local bus (keep latency time for DMA requests low).
- if (!(i % 4))
- read_status_reg(info);
- }
- info->current_rx_buf = 0;
-
- /* set current/1st descriptor address */
- write_reg16(info, RXDMA + CDA,
- info->rx_buf_list_ex[0].phys_entry);
-
- /* set new last rx descriptor address */
- write_reg16(info, RXDMA + EDA,
- info->rx_buf_list_ex[info->rx_buf_count - 1].phys_entry);
-
- /* set buffer length (shared by all rx dma data buffers) */
- write_reg16(info, RXDMA + BFL, SCABUFSIZE);
-
- write_reg(info, RXDMA + DIR, 0x60); /* enable Rx DMA interrupts (EOM/BOF) */
- write_reg(info, RXDMA + DSR, 0xf2); /* clear Rx DMA IRQs, enable Rx DMA */
- } else {
- /* async, enable IRQ on rxdata */
- info->ie0_value |= RXRDYE;
- write_reg(info, IE0, info->ie0_value);
- }
-
- write_reg(info, CMD, RXENABLE);
-
- info->rx_overflow = false;
- info->rx_enabled = true;
-}
-
-/* Enable the transmitter and send a transmit frame if
- * one is loaded in the DMA buffers.
- */
-static void tx_start(SLMP_INFO *info)
-{
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):%s tx_start() tx_count=%d\n",
- __FILE__,__LINE__, info->device_name,info->tx_count );
-
- if (!info->tx_enabled ) {
- write_reg(info, CMD, TXRESET);
- write_reg(info, CMD, TXENABLE);
- info->tx_enabled = true;
- }
-
- if ( info->tx_count ) {
-
- /* If auto RTS enabled and RTS is inactive, then assert */
- /* RTS and set a flag indicating that the driver should */
- /* negate RTS when the transmission completes. */
-
- info->drop_rts_on_tx_done = false;
-
- if (info->params.mode != MGSL_MODE_ASYNC) {
-
- if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) {
- get_signals( info );
- if ( !(info->serial_signals & SerialSignal_RTS) ) {
- info->serial_signals |= SerialSignal_RTS;
- set_signals( info );
- info->drop_rts_on_tx_done = true;
- }
- }
-
- write_reg16(info, TRC0,
- (unsigned short)(((tx_negate_fifo_level-1)<<8) + tx_active_fifo_level));
-
- write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
- write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
-
- /* set TX CDA (current descriptor address) */
- write_reg16(info, TXDMA + CDA,
- info->tx_buf_list_ex[0].phys_entry);
-
- /* set TX EDA (last descriptor address) */
- write_reg16(info, TXDMA + EDA,
- info->tx_buf_list_ex[info->last_tx_buf].phys_entry);
-
- /* enable underrun IRQ */
- info->ie1_value &= ~IDLE;
- info->ie1_value |= UDRN;
- write_reg(info, IE1, info->ie1_value);
- write_reg(info, SR1, (unsigned char)(IDLE + UDRN));
-
- write_reg(info, TXDMA + DIR, 0x40); /* enable Tx DMA interrupts (EOM) */
- write_reg(info, TXDMA + DSR, 0xf2); /* clear Tx DMA IRQs, enable Tx DMA */
-
- mod_timer(&info->tx_timer, jiffies +
- msecs_to_jiffies(5000));
- }
- else {
- tx_load_fifo(info);
- /* async, enable IRQ on txdata */
- info->ie0_value |= TXRDYE;
- write_reg(info, IE0, info->ie0_value);
- }
-
- info->tx_active = true;
- }
-}
-
-/* stop the transmitter and DMA
- */
-static void tx_stop( SLMP_INFO *info )
-{
- if (debug_level >= DEBUG_LEVEL_ISR)
- printk("%s(%d):%s tx_stop()\n",
- __FILE__,__LINE__, info->device_name );
-
- del_timer(&info->tx_timer);
-
- write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
- write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
-
- write_reg(info, CMD, TXRESET);
-
- info->ie1_value &= ~(UDRN + IDLE);
- write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
- write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
-
- info->ie0_value &= ~TXRDYE;
- write_reg(info, IE0, info->ie0_value); /* disable tx data interrupts */
-
- info->tx_enabled = false;
- info->tx_active = false;
-}
-
-/* Fill the transmit FIFO until the FIFO is full or
- * there is no more data to load.
- */
-static void tx_load_fifo(SLMP_INFO *info)
-{
- u8 TwoBytes[2];
-
- /* do nothing is now tx data available and no XON/XOFF pending */
-
- if ( !info->tx_count && !info->x_char )
- return;
-
- /* load the Transmit FIFO until FIFOs full or all data sent */
-
- while( info->tx_count && (read_reg(info,SR0) & BIT1) ) {
-
- /* there is more space in the transmit FIFO and */
- /* there is more data in transmit buffer */
-
- if ( (info->tx_count > 1) && !info->x_char ) {
- /* write 16-bits */
- TwoBytes[0] = info->tx_buf[info->tx_get++];
- if (info->tx_get >= info->max_frame_size)
- info->tx_get -= info->max_frame_size;
- TwoBytes[1] = info->tx_buf[info->tx_get++];
- if (info->tx_get >= info->max_frame_size)
- info->tx_get -= info->max_frame_size;
-
- write_reg16(info, TRB, *((u16 *)TwoBytes));
-
- info->tx_count -= 2;
- info->icount.tx += 2;
- } else {
- /* only 1 byte left to transmit or 1 FIFO slot left */
-
- if (info->x_char) {
- /* transmit pending high priority char */
- write_reg(info, TRB, info->x_char);
- info->x_char = 0;
- } else {
- write_reg(info, TRB, info->tx_buf[info->tx_get++]);
- if (info->tx_get >= info->max_frame_size)
- info->tx_get -= info->max_frame_size;
- info->tx_count--;
- }
- info->icount.tx++;
- }
- }
-}
-
-/* Reset a port to a known state
- */
-static void reset_port(SLMP_INFO *info)
-{
- if (info->sca_base) {
-
- tx_stop(info);
- rx_stop(info);
-
- info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
- set_signals(info);
-
- /* disable all port interrupts */
- info->ie0_value = 0;
- info->ie1_value = 0;
- info->ie2_value = 0;
- write_reg(info, IE0, info->ie0_value);
- write_reg(info, IE1, info->ie1_value);
- write_reg(info, IE2, info->ie2_value);
-
- write_reg(info, CMD, CHRESET);
- }
-}
-
-/* Reset all the ports to a known state.
- */
-static void reset_adapter(SLMP_INFO *info)
-{
- int i;
-
- for ( i=0; i < SCA_MAX_PORTS; ++i) {
- if (info->port_array[i])
- reset_port(info->port_array[i]);
- }
-}
-
-/* Program port for asynchronous communications.
- */
-static void async_mode(SLMP_INFO *info)
-{
-
- unsigned char RegValue;
-
- tx_stop(info);
- rx_stop(info);
-
- /* MD0, Mode Register 0
- *
- * 07..05 PRCTL<2..0>, Protocol Mode, 000=async
- * 04 AUTO, Auto-enable (RTS/CTS/DCD)
- * 03 Reserved, must be 0
- * 02 CRCCC, CRC Calculation, 0=disabled
- * 01..00 STOP<1..0> Stop bits (00=1,10=2)
- *
- * 0000 0000
- */
- RegValue = 0x00;
- if (info->params.stop_bits != 1)
- RegValue |= BIT1;
- write_reg(info, MD0, RegValue);
-
- /* MD1, Mode Register 1
- *
- * 07..06 BRATE<1..0>, bit rate, 00=1/1 01=1/16 10=1/32 11=1/64
- * 05..04 TXCHR<1..0>, tx char size, 00=8 bits,01=7,10=6,11=5
- * 03..02 RXCHR<1..0>, rx char size
- * 01..00 PMPM<1..0>, Parity mode, 00=none 10=even 11=odd
- *
- * 0100 0000
- */
- RegValue = 0x40;
- switch (info->params.data_bits) {
- case 7: RegValue |= BIT4 + BIT2; break;
- case 6: RegValue |= BIT5 + BIT3; break;
- case 5: RegValue |= BIT5 + BIT4 + BIT3 + BIT2; break;
- }
- if (info->params.parity != ASYNC_PARITY_NONE) {
- RegValue |= BIT1;
- if (info->params.parity == ASYNC_PARITY_ODD)
- RegValue |= BIT0;
- }
- write_reg(info, MD1, RegValue);
-
- /* MD2, Mode Register 2
- *
- * 07..02 Reserved, must be 0
- * 01..00 CNCT<1..0> Channel connection, 00=normal 11=local loopback
- *
- * 0000 0000
- */
- RegValue = 0x00;
- if (info->params.loopback)
- RegValue |= (BIT1 + BIT0);
- write_reg(info, MD2, RegValue);
-
- /* RXS, Receive clock source
- *
- * 07 Reserved, must be 0
- * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
- * 03..00 RXBR<3..0>, rate divisor, 0000=1
- */
- RegValue=BIT6;
- write_reg(info, RXS, RegValue);
-
- /* TXS, Transmit clock source
- *
- * 07 Reserved, must be 0
- * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
- * 03..00 RXBR<3..0>, rate divisor, 0000=1
- */
- RegValue=BIT6;
- write_reg(info, TXS, RegValue);
-
- /* Control Register
- *
- * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
- */
- info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
- write_control_reg(info);
-
- tx_set_idle(info);
-
- /* RRC Receive Ready Control 0
- *
- * 07..05 Reserved, must be 0
- * 04..00 RRC<4..0> Rx FIFO trigger active 0x00 = 1 byte
- */
- write_reg(info, RRC, 0x00);
-
- /* TRC0 Transmit Ready Control 0
- *
- * 07..05 Reserved, must be 0
- * 04..00 TRC<4..0> Tx FIFO trigger active 0x10 = 16 bytes
- */
- write_reg(info, TRC0, 0x10);
-
- /* TRC1 Transmit Ready Control 1
- *
- * 07..05 Reserved, must be 0
- * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1e = 31 bytes (full-1)
- */
- write_reg(info, TRC1, 0x1e);
-
- /* CTL, MSCI control register
- *
- * 07..06 Reserved, set to 0
- * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
- * 04 IDLC, idle control, 0=mark 1=idle register
- * 03 BRK, break, 0=off 1 =on (async)
- * 02 SYNCLD, sync char load enable (BSC) 1=enabled
- * 01 GOP, go active on poll (LOOP mode) 1=enabled
- * 00 RTS, RTS output control, 0=active 1=inactive
- *
- * 0001 0001
- */
- RegValue = 0x10;
- if (!(info->serial_signals & SerialSignal_RTS))
- RegValue |= 0x01;
- write_reg(info, CTL, RegValue);
-
- /* enable status interrupts */
- info->ie0_value |= TXINTE + RXINTE;
- write_reg(info, IE0, info->ie0_value);
-
- /* enable break detect interrupt */
- info->ie1_value = BRKD;
- write_reg(info, IE1, info->ie1_value);
-
- /* enable rx overrun interrupt */
- info->ie2_value = OVRN;
- write_reg(info, IE2, info->ie2_value);
-
- set_rate( info, info->params.data_rate * 16 );
-}
-
-/* Program the SCA for HDLC communications.
- */
-static void hdlc_mode(SLMP_INFO *info)
-{
- unsigned char RegValue;
- u32 DpllDivisor;
-
- // Can't use DPLL because SCA outputs recovered clock on RxC when
- // DPLL mode selected. This causes output contention with RxC receiver.
- // Use of DPLL would require external hardware to disable RxC receiver
- // when DPLL mode selected.
- info->params.flags &= ~(HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL);
-
- /* disable DMA interrupts */
- write_reg(info, TXDMA + DIR, 0);
- write_reg(info, RXDMA + DIR, 0);
-
- /* MD0, Mode Register 0
- *
- * 07..05 PRCTL<2..0>, Protocol Mode, 100=HDLC
- * 04 AUTO, Auto-enable (RTS/CTS/DCD)
- * 03 Reserved, must be 0
- * 02 CRCCC, CRC Calculation, 1=enabled
- * 01 CRC1, CRC selection, 0=CRC-16,1=CRC-CCITT-16
- * 00 CRC0, CRC initial value, 1 = all 1s
- *
- * 1000 0001
- */
- RegValue = 0x81;
- if (info->params.flags & HDLC_FLAG_AUTO_CTS)
- RegValue |= BIT4;
- if (info->params.flags & HDLC_FLAG_AUTO_DCD)
- RegValue |= BIT4;
- if (info->params.crc_type == HDLC_CRC_16_CCITT)
- RegValue |= BIT2 + BIT1;
- write_reg(info, MD0, RegValue);
-
- /* MD1, Mode Register 1
- *
- * 07..06 ADDRS<1..0>, Address detect, 00=no addr check
- * 05..04 TXCHR<1..0>, tx char size, 00=8 bits
- * 03..02 RXCHR<1..0>, rx char size, 00=8 bits
- * 01..00 PMPM<1..0>, Parity mode, 00=no parity
- *
- * 0000 0000
- */
- RegValue = 0x00;
- write_reg(info, MD1, RegValue);
-
- /* MD2, Mode Register 2
- *
- * 07 NRZFM, 0=NRZ, 1=FM
- * 06..05 CODE<1..0> Encoding, 00=NRZ
- * 04..03 DRATE<1..0> DPLL Divisor, 00=8
- * 02 Reserved, must be 0
- * 01..00 CNCT<1..0> Channel connection, 0=normal
- *
- * 0000 0000
- */
- RegValue = 0x00;
- switch(info->params.encoding) {
- case HDLC_ENCODING_NRZI: RegValue |= BIT5; break;
- case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT7 + BIT5; break; /* aka FM1 */
- case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT7 + BIT6; break; /* aka FM0 */
- case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT7; break; /* aka Manchester */
-#if 0
- case HDLC_ENCODING_NRZB: /* not supported */
- case HDLC_ENCODING_NRZI_MARK: /* not supported */
- case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: /* not supported */
-#endif
- }
- if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) {
- DpllDivisor = 16;
- RegValue |= BIT3;
- } else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) {
- DpllDivisor = 8;
- } else {
- DpllDivisor = 32;
- RegValue |= BIT4;
- }
- write_reg(info, MD2, RegValue);
-
-
- /* RXS, Receive clock source
- *
- * 07 Reserved, must be 0
- * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
- * 03..00 RXBR<3..0>, rate divisor, 0000=1
- */
- RegValue=0;
- if (info->params.flags & HDLC_FLAG_RXC_BRG)
- RegValue |= BIT6;
- if (info->params.flags & HDLC_FLAG_RXC_DPLL)
- RegValue |= BIT6 + BIT5;
- write_reg(info, RXS, RegValue);
-
- /* TXS, Transmit clock source
- *
- * 07 Reserved, must be 0
- * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
- * 03..00 RXBR<3..0>, rate divisor, 0000=1
- */
- RegValue=0;
- if (info->params.flags & HDLC_FLAG_TXC_BRG)
- RegValue |= BIT6;
- if (info->params.flags & HDLC_FLAG_TXC_DPLL)
- RegValue |= BIT6 + BIT5;
- write_reg(info, TXS, RegValue);
-
- if (info->params.flags & HDLC_FLAG_RXC_DPLL)
- set_rate(info, info->params.clock_speed * DpllDivisor);
- else
- set_rate(info, info->params.clock_speed);
-
- /* GPDATA (General Purpose I/O Data Register)
- *
- * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
- */
- if (info->params.flags & HDLC_FLAG_TXC_BRG)
- info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
- else
- info->port_array[0]->ctrlreg_value &= ~(BIT0 << (info->port_num * 2));
- write_control_reg(info);
-
- /* RRC Receive Ready Control 0
- *
- * 07..05 Reserved, must be 0
- * 04..00 RRC<4..0> Rx FIFO trigger active
- */
- write_reg(info, RRC, rx_active_fifo_level);
-
- /* TRC0 Transmit Ready Control 0
- *
- * 07..05 Reserved, must be 0
- * 04..00 TRC<4..0> Tx FIFO trigger active
- */
- write_reg(info, TRC0, tx_active_fifo_level);
-
- /* TRC1 Transmit Ready Control 1
- *
- * 07..05 Reserved, must be 0
- * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1f = 32 bytes (full)
- */
- write_reg(info, TRC1, (unsigned char)(tx_negate_fifo_level - 1));
-
- /* DMR, DMA Mode Register
- *
- * 07..05 Reserved, must be 0
- * 04 TMOD, Transfer Mode: 1=chained-block
- * 03 Reserved, must be 0
- * 02 NF, Number of Frames: 1=multi-frame
- * 01 CNTE, Frame End IRQ Counter enable: 0=disabled
- * 00 Reserved, must be 0
- *
- * 0001 0100
- */
- write_reg(info, TXDMA + DMR, 0x14);
- write_reg(info, RXDMA + DMR, 0x14);
-
- /* Set chain pointer base (upper 8 bits of 24 bit addr) */
- write_reg(info, RXDMA + CPB,
- (unsigned char)(info->buffer_list_phys >> 16));
-
- /* Set chain pointer base (upper 8 bits of 24 bit addr) */
- write_reg(info, TXDMA + CPB,
- (unsigned char)(info->buffer_list_phys >> 16));
-
- /* enable status interrupts. other code enables/disables
- * the individual sources for these two interrupt classes.
- */
- info->ie0_value |= TXINTE + RXINTE;
- write_reg(info, IE0, info->ie0_value);
-
- /* CTL, MSCI control register
- *
- * 07..06 Reserved, set to 0
- * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
- * 04 IDLC, idle control, 0=mark 1=idle register
- * 03 BRK, break, 0=off 1 =on (async)
- * 02 SYNCLD, sync char load enable (BSC) 1=enabled
- * 01 GOP, go active on poll (LOOP mode) 1=enabled
- * 00 RTS, RTS output control, 0=active 1=inactive
- *
- * 0001 0001
- */
- RegValue = 0x10;
- if (!(info->serial_signals & SerialSignal_RTS))
- RegValue |= 0x01;
- write_reg(info, CTL, RegValue);
-
- /* preamble not supported ! */
-
- tx_set_idle(info);
- tx_stop(info);
- rx_stop(info);
-
- set_rate(info, info->params.clock_speed);
-
- if (info->params.loopback)
- enable_loopback(info,1);
-}
-
-/* Set the transmit HDLC idle mode
- */
-static void tx_set_idle(SLMP_INFO *info)
-{
- unsigned char RegValue = 0xff;
-
- /* Map API idle mode to SCA register bits */
- switch(info->idle_mode) {
- case HDLC_TXIDLE_FLAGS: RegValue = 0x7e; break;
- case HDLC_TXIDLE_ALT_ZEROS_ONES: RegValue = 0xaa; break;
- case HDLC_TXIDLE_ZEROS: RegValue = 0x00; break;
- case HDLC_TXIDLE_ONES: RegValue = 0xff; break;
- case HDLC_TXIDLE_ALT_MARK_SPACE: RegValue = 0xaa; break;
- case HDLC_TXIDLE_SPACE: RegValue = 0x00; break;
- case HDLC_TXIDLE_MARK: RegValue = 0xff; break;
- }
-
- write_reg(info, IDL, RegValue);
-}
-
-/* Query the adapter for the state of the V24 status (input) signals.
- */
-static void get_signals(SLMP_INFO *info)
-{
- u16 status = read_reg(info, SR3);
- u16 gpstatus = read_status_reg(info);
- u16 testbit;
-
- /* clear all serial signals except DTR and RTS */
- info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
-
- /* set serial signal bits to reflect MISR */
-
- if (!(status & BIT3))
- info->serial_signals |= SerialSignal_CTS;
-
- if ( !(status & BIT2))
- info->serial_signals |= SerialSignal_DCD;
-
- testbit = BIT1 << (info->port_num * 2); // Port 0..3 RI is GPDATA<1,3,5,7>
- if (!(gpstatus & testbit))
- info->serial_signals |= SerialSignal_RI;
-
- testbit = BIT0 << (info->port_num * 2); // Port 0..3 DSR is GPDATA<0,2,4,6>
- if (!(gpstatus & testbit))
- info->serial_signals |= SerialSignal_DSR;
-}
-
-/* Set the state of DTR and RTS based on contents of
- * serial_signals member of device context.
- */
-static void set_signals(SLMP_INFO *info)
-{
- unsigned char RegValue;
- u16 EnableBit;
-
- RegValue = read_reg(info, CTL);
- if (info->serial_signals & SerialSignal_RTS)
- RegValue &= ~BIT0;
- else
- RegValue |= BIT0;
- write_reg(info, CTL, RegValue);
-
- // Port 0..3 DTR is ctrl reg <1,3,5,7>
- EnableBit = BIT1 << (info->port_num*2);
- if (info->serial_signals & SerialSignal_DTR)
- info->port_array[0]->ctrlreg_value &= ~EnableBit;
- else
- info->port_array[0]->ctrlreg_value |= EnableBit;
- write_control_reg(info);
-}
-
-/*******************/
-/* DMA Buffer Code */
-/*******************/
-
-/* Set the count for all receive buffers to SCABUFSIZE
- * and set the current buffer to the first buffer. This effectively
- * makes all buffers free and discards any data in buffers.
- */
-static void rx_reset_buffers(SLMP_INFO *info)
-{
- rx_free_frame_buffers(info, 0, info->rx_buf_count - 1);
-}
-
-/* Free the buffers used by a received frame
- *
- * info pointer to device instance data
- * first index of 1st receive buffer of frame
- * last index of last receive buffer of frame
- */
-static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last)
-{
- bool done = false;
-
- while(!done) {
- /* reset current buffer for reuse */
- info->rx_buf_list[first].status = 0xff;
-
- if (first == last) {
- done = true;
- /* set new last rx descriptor address */
- write_reg16(info, RXDMA + EDA, info->rx_buf_list_ex[first].phys_entry);
- }
-
- first++;
- if (first == info->rx_buf_count)
- first = 0;
- }
-
- /* set current buffer to next buffer after last buffer of frame */
- info->current_rx_buf = first;
-}
-
-/* Return a received frame from the receive DMA buffers.
- * Only frames received without errors are returned.
- *
- * Return Value: true if frame returned, otherwise false
- */
-static bool rx_get_frame(SLMP_INFO *info)
-{
- unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */
- unsigned short status;
- unsigned int framesize = 0;
- bool ReturnCode = false;
- unsigned long flags;
- struct tty_struct *tty = info->port.tty;
- unsigned char addr_field = 0xff;
- SCADESC *desc;
- SCADESC_EX *desc_ex;
-
-CheckAgain:
- /* assume no frame returned, set zero length */
- framesize = 0;
- addr_field = 0xff;
-
- /*
- * current_rx_buf points to the 1st buffer of the next available
- * receive frame. To find the last buffer of the frame look for
- * a non-zero status field in the buffer entries. (The status
- * field is set by the 16C32 after completing a receive frame.
- */
- StartIndex = EndIndex = info->current_rx_buf;
-
- for ( ;; ) {
- desc = &info->rx_buf_list[EndIndex];
- desc_ex = &info->rx_buf_list_ex[EndIndex];
-
- if (desc->status == 0xff)
- goto Cleanup; /* current desc still in use, no frames available */
-
- if (framesize == 0 && info->params.addr_filter != 0xff)
- addr_field = desc_ex->virt_addr[0];
-
- framesize += desc->length;
-
- /* Status != 0 means last buffer of frame */
- if (desc->status)
- break;
-
- EndIndex++;
- if (EndIndex == info->rx_buf_count)
- EndIndex = 0;
-
- if (EndIndex == info->current_rx_buf) {
- /* all buffers have been 'used' but none mark */
- /* the end of a frame. Reset buffers and receiver. */
- if ( info->rx_enabled ){
- spin_lock_irqsave(&info->lock,flags);
- rx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
- goto Cleanup;
- }
-
- }
-
- /* check status of receive frame */
-
- /* frame status is byte stored after frame data
- *
- * 7 EOM (end of msg), 1 = last buffer of frame
- * 6 Short Frame, 1 = short frame
- * 5 Abort, 1 = frame aborted
- * 4 Residue, 1 = last byte is partial
- * 3 Overrun, 1 = overrun occurred during frame reception
- * 2 CRC, 1 = CRC error detected
- *
- */
- status = desc->status;
-
- /* ignore CRC bit if not using CRC (bit is undefined) */
- /* Note:CRC is not save to data buffer */
- if (info->params.crc_type == HDLC_CRC_NONE)
- status &= ~BIT2;
-
- if (framesize == 0 ||
- (addr_field != 0xff && addr_field != info->params.addr_filter)) {
- /* discard 0 byte frames, this seems to occur sometime
- * when remote is idling flags.
- */
- rx_free_frame_buffers(info, StartIndex, EndIndex);
- goto CheckAgain;
- }
-
- if (framesize < 2)
- status |= BIT6;
-
- if (status & (BIT6+BIT5+BIT3+BIT2)) {
- /* received frame has errors,
- * update counts and mark frame size as 0
- */
- if (status & BIT6)
- info->icount.rxshort++;
- else if (status & BIT5)
- info->icount.rxabort++;
- else if (status & BIT3)
- info->icount.rxover++;
- else
- info->icount.rxcrc++;
-
- framesize = 0;
-#if SYNCLINK_GENERIC_HDLC
- {
- info->netdev->stats.rx_errors++;
- info->netdev->stats.rx_frame_errors++;
- }
-#endif
- }
-
- if ( debug_level >= DEBUG_LEVEL_BH )
- printk("%s(%d):%s rx_get_frame() status=%04X size=%d\n",
- __FILE__,__LINE__,info->device_name,status,framesize);
-
- if ( debug_level >= DEBUG_LEVEL_DATA )
- trace_block(info,info->rx_buf_list_ex[StartIndex].virt_addr,
- min_t(int, framesize,SCABUFSIZE),0);
-
- if (framesize) {
- if (framesize > info->max_frame_size)
- info->icount.rxlong++;
- else {
- /* copy dma buffer(s) to contiguous intermediate buffer */
- int copy_count = framesize;
- int index = StartIndex;
- unsigned char *ptmp = info->tmp_rx_buf;
- info->tmp_rx_buf_count = framesize;
-
- info->icount.rxok++;
-
- while(copy_count) {
- int partial_count = min(copy_count,SCABUFSIZE);
- memcpy( ptmp,
- info->rx_buf_list_ex[index].virt_addr,
- partial_count );
- ptmp += partial_count;
- copy_count -= partial_count;
-
- if ( ++index == info->rx_buf_count )
- index = 0;
- }
-
-#if SYNCLINK_GENERIC_HDLC
- if (info->netcount)
- hdlcdev_rx(info,info->tmp_rx_buf,framesize);
- else
-#endif
- ldisc_receive_buf(tty,info->tmp_rx_buf,
- info->flag_buf, framesize);
- }
- }
- /* Free the buffers used by this frame. */
- rx_free_frame_buffers( info, StartIndex, EndIndex );
-
- ReturnCode = true;
-
-Cleanup:
- if ( info->rx_enabled && info->rx_overflow ) {
- /* Receiver is enabled, but needs to restarted due to
- * rx buffer overflow. If buffers are empty, restart receiver.
- */
- if (info->rx_buf_list[EndIndex].status == 0xff) {
- spin_lock_irqsave(&info->lock,flags);
- rx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
- }
-
- return ReturnCode;
-}
-
-/* load the transmit DMA buffer with data
- */
-static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count)
-{
- unsigned short copy_count;
- unsigned int i = 0;
- SCADESC *desc;
- SCADESC_EX *desc_ex;
-
- if ( debug_level >= DEBUG_LEVEL_DATA )
- trace_block(info,buf, min_t(int, count,SCABUFSIZE), 1);
-
- /* Copy source buffer to one or more DMA buffers, starting with
- * the first transmit dma buffer.
- */
- for(i=0;;)
- {
- copy_count = min_t(unsigned short,count,SCABUFSIZE);
-
- desc = &info->tx_buf_list[i];
- desc_ex = &info->tx_buf_list_ex[i];
-
- load_pci_memory(info, desc_ex->virt_addr,buf,copy_count);
-
- desc->length = copy_count;
- desc->status = 0;
-
- buf += copy_count;
- count -= copy_count;
-
- if (!count)
- break;
-
- i++;
- if (i >= info->tx_buf_count)
- i = 0;
- }
-
- info->tx_buf_list[i].status = 0x81; /* set EOM and EOT status */
- info->last_tx_buf = ++i;
-}
-
-static bool register_test(SLMP_INFO *info)
-{
- static unsigned char testval[] = {0x00, 0xff, 0xaa, 0x55, 0x69, 0x96};
- static unsigned int count = ARRAY_SIZE(testval);
- unsigned int i;
- bool rc = true;
- unsigned long flags;
-
- spin_lock_irqsave(&info->lock,flags);
- reset_port(info);
-
- /* assume failure */
- info->init_error = DiagStatus_AddressFailure;
-
- /* Write bit patterns to various registers but do it out of */
- /* sync, then read back and verify values. */
-
- for (i = 0 ; i < count ; i++) {
- write_reg(info, TMC, testval[i]);
- write_reg(info, IDL, testval[(i+1)%count]);
- write_reg(info, SA0, testval[(i+2)%count]);
- write_reg(info, SA1, testval[(i+3)%count]);
-
- if ( (read_reg(info, TMC) != testval[i]) ||
- (read_reg(info, IDL) != testval[(i+1)%count]) ||
- (read_reg(info, SA0) != testval[(i+2)%count]) ||
- (read_reg(info, SA1) != testval[(i+3)%count]) )
- {
- rc = false;
- break;
- }
- }
-
- reset_port(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- return rc;
-}
-
-static bool irq_test(SLMP_INFO *info)
-{
- unsigned long timeout;
- unsigned long flags;
-
- unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
-
- spin_lock_irqsave(&info->lock,flags);
- reset_port(info);
-
- /* assume failure */
- info->init_error = DiagStatus_IrqFailure;
- info->irq_occurred = false;
-
- /* setup timer0 on SCA0 to interrupt */
-
- /* IER2<7..4> = timer<3..0> interrupt enables (1=enabled) */
- write_reg(info, IER2, (unsigned char)((info->port_num & 1) ? BIT6 : BIT4));
-
- write_reg(info, (unsigned char)(timer + TEPR), 0); /* timer expand prescale */
- write_reg16(info, (unsigned char)(timer + TCONR), 1); /* timer constant */
-
-
- /* TMCS, Timer Control/Status Register
- *
- * 07 CMF, Compare match flag (read only) 1=match
- * 06 ECMI, CMF Interrupt Enable: 1=enabled
- * 05 Reserved, must be 0
- * 04 TME, Timer Enable
- * 03..00 Reserved, must be 0
- *
- * 0101 0000
- */
- write_reg(info, (unsigned char)(timer + TMCS), 0x50);
-
- spin_unlock_irqrestore(&info->lock,flags);
-
- timeout=100;
- while( timeout-- && !info->irq_occurred ) {
- msleep_interruptible(10);
- }
-
- spin_lock_irqsave(&info->lock,flags);
- reset_port(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- return info->irq_occurred;
-}
-
-/* initialize individual SCA device (2 ports)
- */
-static bool sca_init(SLMP_INFO *info)
-{
- /* set wait controller to single mem partition (low), no wait states */
- write_reg(info, PABR0, 0); /* wait controller addr boundary 0 */
- write_reg(info, PABR1, 0); /* wait controller addr boundary 1 */
- write_reg(info, WCRL, 0); /* wait controller low range */
- write_reg(info, WCRM, 0); /* wait controller mid range */
- write_reg(info, WCRH, 0); /* wait controller high range */
-
- /* DPCR, DMA Priority Control
- *
- * 07..05 Not used, must be 0
- * 04 BRC, bus release condition: 0=all transfers complete
- * 03 CCC, channel change condition: 0=every cycle
- * 02..00 PR<2..0>, priority 100=round robin
- *
- * 00000100 = 0x04
- */
- write_reg(info, DPCR, dma_priority);
-
- /* DMA Master Enable, BIT7: 1=enable all channels */
- write_reg(info, DMER, 0x80);
-
- /* enable all interrupt classes */
- write_reg(info, IER0, 0xff); /* TxRDY,RxRDY,TxINT,RxINT (ports 0-1) */
- write_reg(info, IER1, 0xff); /* DMIB,DMIA (channels 0-3) */
- write_reg(info, IER2, 0xf0); /* TIRQ (timers 0-3) */
-
- /* ITCR, interrupt control register
- * 07 IPC, interrupt priority, 0=MSCI->DMA
- * 06..05 IAK<1..0>, Acknowledge cycle, 00=non-ack cycle
- * 04 VOS, Vector Output, 0=unmodified vector
- * 03..00 Reserved, must be 0
- */
- write_reg(info, ITCR, 0);
-
- return true;
-}
-
-/* initialize adapter hardware
- */
-static bool init_adapter(SLMP_INFO *info)
-{
- int i;
-
- /* Set BIT30 of Local Control Reg 0x50 to reset SCA */
- volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50);
- u32 readval;
-
- info->misc_ctrl_value |= BIT30;
- *MiscCtrl = info->misc_ctrl_value;
-
- /*
- * Force at least 170ns delay before clearing
- * reset bit. Each read from LCR takes at least
- * 30ns so 10 times for 300ns to be safe.
- */
- for(i=0;i<10;i++)
- readval = *MiscCtrl;
-
- info->misc_ctrl_value &= ~BIT30;
- *MiscCtrl = info->misc_ctrl_value;
-
- /* init control reg (all DTRs off, all clksel=input) */
- info->ctrlreg_value = 0xaa;
- write_control_reg(info);
-
- {
- volatile u32 *LCR1BRDR = (u32 *)(info->lcr_base + 0x2c);
- lcr1_brdr_value &= ~(BIT5 + BIT4 + BIT3);
-
- switch(read_ahead_count)
- {
- case 16:
- lcr1_brdr_value |= BIT5 + BIT4 + BIT3;
- break;
- case 8:
- lcr1_brdr_value |= BIT5 + BIT4;
- break;
- case 4:
- lcr1_brdr_value |= BIT5 + BIT3;
- break;
- case 0:
- lcr1_brdr_value |= BIT5;
- break;
- }
-
- *LCR1BRDR = lcr1_brdr_value;
- *MiscCtrl = misc_ctrl_value;
- }
-
- sca_init(info->port_array[0]);
- sca_init(info->port_array[2]);
-
- return true;
-}
-
-/* Loopback an HDLC frame to test the hardware
- * interrupt and DMA functions.
- */
-static bool loopback_test(SLMP_INFO *info)
-{
-#define TESTFRAMESIZE 20
-
- unsigned long timeout;
- u16 count = TESTFRAMESIZE;
- unsigned char buf[TESTFRAMESIZE];
- bool rc = false;
- unsigned long flags;
-
- struct tty_struct *oldtty = info->port.tty;
- u32 speed = info->params.clock_speed;
-
- info->params.clock_speed = 3686400;
- info->port.tty = NULL;
-
- /* assume failure */
- info->init_error = DiagStatus_DmaFailure;
-
- /* build and send transmit frame */
- for (count = 0; count < TESTFRAMESIZE;++count)
- buf[count] = (unsigned char)count;
-
- memset(info->tmp_rx_buf,0,TESTFRAMESIZE);
-
- /* program hardware for HDLC and enabled receiver */
- spin_lock_irqsave(&info->lock,flags);
- hdlc_mode(info);
- enable_loopback(info,1);
- rx_start(info);
- info->tx_count = count;
- tx_load_dma_buffer(info,buf,count);
- tx_start(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- /* wait for receive complete */
- /* Set a timeout for waiting for interrupt. */
- for ( timeout = 100; timeout; --timeout ) {
- msleep_interruptible(10);
-
- if (rx_get_frame(info)) {
- rc = true;
- break;
- }
- }
-
- /* verify received frame length and contents */
- if (rc &&
- ( info->tmp_rx_buf_count != count ||
- memcmp(buf, info->tmp_rx_buf,count))) {
- rc = false;
- }
-
- spin_lock_irqsave(&info->lock,flags);
- reset_adapter(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- info->params.clock_speed = speed;
- info->port.tty = oldtty;
-
- return rc;
-}
-
-/* Perform diagnostics on hardware
- */
-static int adapter_test( SLMP_INFO *info )
-{
- unsigned long flags;
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):Testing device %s\n",
- __FILE__,__LINE__,info->device_name );
-
- spin_lock_irqsave(&info->lock,flags);
- init_adapter(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- info->port_array[0]->port_count = 0;
-
- if ( register_test(info->port_array[0]) &&
- register_test(info->port_array[1])) {
-
- info->port_array[0]->port_count = 2;
-
- if ( register_test(info->port_array[2]) &&
- register_test(info->port_array[3]) )
- info->port_array[0]->port_count += 2;
- }
- else {
- printk( "%s(%d):Register test failure for device %s Addr=%08lX\n",
- __FILE__,__LINE__,info->device_name, (unsigned long)(info->phys_sca_base));
- return -ENODEV;
- }
-
- if ( !irq_test(info->port_array[0]) ||
- !irq_test(info->port_array[1]) ||
- (info->port_count == 4 && !irq_test(info->port_array[2])) ||
- (info->port_count == 4 && !irq_test(info->port_array[3]))) {
- printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
- __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
- return -ENODEV;
- }
-
- if (!loopback_test(info->port_array[0]) ||
- !loopback_test(info->port_array[1]) ||
- (info->port_count == 4 && !loopback_test(info->port_array[2])) ||
- (info->port_count == 4 && !loopback_test(info->port_array[3]))) {
- printk( "%s(%d):DMA test failure for device %s\n",
- __FILE__,__LINE__,info->device_name);
- return -ENODEV;
- }
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):device %s passed diagnostics\n",
- __FILE__,__LINE__,info->device_name );
-
- info->port_array[0]->init_error = 0;
- info->port_array[1]->init_error = 0;
- if ( info->port_count > 2 ) {
- info->port_array[2]->init_error = 0;
- info->port_array[3]->init_error = 0;
- }
-
- return 0;
-}
-
-/* Test the shared memory on a PCI adapter.
- */
-static bool memory_test(SLMP_INFO *info)
-{
- static unsigned long testval[] = { 0x0, 0x55555555, 0xaaaaaaaa,
- 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
- unsigned long count = ARRAY_SIZE(testval);
- unsigned long i;
- unsigned long limit = SCA_MEM_SIZE/sizeof(unsigned long);
- unsigned long * addr = (unsigned long *)info->memory_base;
-
- /* Test data lines with test pattern at one location. */
-
- for ( i = 0 ; i < count ; i++ ) {
- *addr = testval[i];
- if ( *addr != testval[i] )
- return false;
- }
-
- /* Test address lines with incrementing pattern over */
- /* entire address range. */
-
- for ( i = 0 ; i < limit ; i++ ) {
- *addr = i * 4;
- addr++;
- }
-
- addr = (unsigned long *)info->memory_base;
-
- for ( i = 0 ; i < limit ; i++ ) {
- if ( *addr != i * 4 )
- return false;
- addr++;
- }
-
- memset( info->memory_base, 0, SCA_MEM_SIZE );
- return true;
-}
-
-/* Load data into PCI adapter shared memory.
- *
- * The PCI9050 releases control of the local bus
- * after completing the current read or write operation.
- *
- * While the PCI9050 write FIFO not empty, the
- * PCI9050 treats all of the writes as a single transaction
- * and does not release the bus. This causes DMA latency problems
- * at high speeds when copying large data blocks to the shared memory.
- *
- * This function breaks a write into multiple transations by
- * interleaving a read which flushes the write FIFO and 'completes'
- * the write transation. This allows any pending DMA request to gain control
- * of the local bus in a timely fasion.
- */
-static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count)
-{
- /* A load interval of 16 allows for 4 32-bit writes at */
- /* 136ns each for a maximum latency of 542ns on the local bus.*/
-
- unsigned short interval = count / sca_pci_load_interval;
- unsigned short i;
-
- for ( i = 0 ; i < interval ; i++ )
- {
- memcpy(dest, src, sca_pci_load_interval);
- read_status_reg(info);
- dest += sca_pci_load_interval;
- src += sca_pci_load_interval;
- }
-
- memcpy(dest, src, count % sca_pci_load_interval);
-}
-
-static void trace_block(SLMP_INFO *info,const char* data, int count, int xmit)
-{
- int i;
- int linecount;
- if (xmit)
- printk("%s tx data:\n",info->device_name);
- else
- printk("%s rx data:\n",info->device_name);
-
- while(count) {
- if (count > 16)
- linecount = 16;
- else
- linecount = count;
-
- for(i=0;i<linecount;i++)
- printk("%02X ",(unsigned char)data[i]);
- for(;i<17;i++)
- printk(" ");
- for(i=0;i<linecount;i++) {
- if (data[i]>=040 && data[i]<=0176)
- printk("%c",data[i]);
- else
- printk(".");
- }
- printk("\n");
-
- data += linecount;
- count -= linecount;
- }
-} /* end of trace_block() */
-
-/* called when HDLC frame times out
- * update stats and do tx completion processing
- */
-static void tx_timeout(unsigned long context)
-{
- SLMP_INFO *info = (SLMP_INFO*)context;
- unsigned long flags;
-
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):%s tx_timeout()\n",
- __FILE__,__LINE__,info->device_name);
- if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) {
- info->icount.txtimeout++;
- }
- spin_lock_irqsave(&info->lock,flags);
- info->tx_active = false;
- info->tx_count = info->tx_put = info->tx_get = 0;
-
- spin_unlock_irqrestore(&info->lock,flags);
-
-#if SYNCLINK_GENERIC_HDLC
- if (info->netcount)
- hdlcdev_tx_done(info);
- else
-#endif
- bh_transmit(info);
-}
-
-/* called to periodically check the DSR/RI modem signal input status
- */
-static void status_timeout(unsigned long context)
-{
- u16 status = 0;
- SLMP_INFO *info = (SLMP_INFO*)context;
- unsigned long flags;
- unsigned char delta;
-
-
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
-
- /* check for DSR/RI state change */
-
- delta = info->old_signals ^ info->serial_signals;
- info->old_signals = info->serial_signals;
-
- if (delta & SerialSignal_DSR)
- status |= MISCSTATUS_DSR_LATCHED|(info->serial_signals&SerialSignal_DSR);
-
- if (delta & SerialSignal_RI)
- status |= MISCSTATUS_RI_LATCHED|(info->serial_signals&SerialSignal_RI);
-
- if (delta & SerialSignal_DCD)
- status |= MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD);
-
- if (delta & SerialSignal_CTS)
- status |= MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS);
-
- if (status)
- isr_io_pin(info,status);
-
- mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10));
-}
-
-
-/* Register Access Routines -
- * All registers are memory mapped
- */
-#define CALC_REGADDR() \
- unsigned char * RegAddr = (unsigned char*)(info->sca_base + Addr); \
- if (info->port_num > 1) \
- RegAddr += 256; /* port 0-1 SCA0, 2-3 SCA1 */ \
- if ( info->port_num & 1) { \
- if (Addr > 0x7f) \
- RegAddr += 0x40; /* DMA access */ \
- else if (Addr > 0x1f && Addr < 0x60) \
- RegAddr += 0x20; /* MSCI access */ \
- }
-
-
-static unsigned char read_reg(SLMP_INFO * info, unsigned char Addr)
-{
- CALC_REGADDR();
- return *RegAddr;
-}
-static void write_reg(SLMP_INFO * info, unsigned char Addr, unsigned char Value)
-{
- CALC_REGADDR();
- *RegAddr = Value;
-}
-
-static u16 read_reg16(SLMP_INFO * info, unsigned char Addr)
-{
- CALC_REGADDR();
- return *((u16 *)RegAddr);
-}
-
-static void write_reg16(SLMP_INFO * info, unsigned char Addr, u16 Value)
-{
- CALC_REGADDR();
- *((u16 *)RegAddr) = Value;
-}
-
-static unsigned char read_status_reg(SLMP_INFO * info)
-{
- unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
- return *RegAddr;
-}
-
-static void write_control_reg(SLMP_INFO * info)
-{
- unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
- *RegAddr = info->port_array[0]->ctrlreg_value;
-}
-
-
-static int __devinit synclinkmp_init_one (struct pci_dev *dev,
- const struct pci_device_id *ent)
-{
- if (pci_enable_device(dev)) {
- printk("error enabling pci device %p\n", dev);
- return -EIO;
- }
- device_init( ++synclinkmp_adapter_count, dev );
- return 0;
-}
-
-static void __devexit synclinkmp_remove_one (struct pci_dev *dev)
-{
-}
When not in use, each legacy PTY occupies 12 bytes on 32-bit
architectures and 24 bytes on 64-bit architectures.
+config BFIN_JTAG_COMM
+ tristate "Blackfin JTAG Communication"
+ depends on BLACKFIN
+ help
+ Add support for emulating a TTY device over the Blackfin JTAG.
+
+ To compile this driver as a module, choose M here: the
+ module will be called bfin_jtag_comm.
+
+config BFIN_JTAG_COMM_CONSOLE
+ bool "Console on Blackfin JTAG"
+ depends on BFIN_JTAG_COMM=y
+
+config SERIAL_NONSTANDARD
+ bool "Non-standard serial port support"
+ depends on HAS_IOMEM
+ ---help---
+ Say Y here if you have any non-standard serial boards -- boards
+ which aren't supported using the standard "dumb" serial driver.
+ This includes intelligent serial boards such as Cyclades,
+ Digiboards, etc. These are usually used for systems that need many
+ serial ports because they serve many terminals or dial-in
+ connections.
+
+ Note that the answer to this question won't directly affect the
+ kernel: saying N will just cause the configurator to skip all
+ the questions about non-standard serial boards.
+
+ Most people can say N here.
+
+config ROCKETPORT
+ tristate "Comtrol RocketPort support"
+ depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
+ help
+ This driver supports Comtrol RocketPort and RocketModem PCI boards.
+ These boards provide 2, 4, 8, 16, or 32 high-speed serial ports or
+ modems. For information about the RocketPort/RocketModem boards
+ and this driver read <file:Documentation/serial/rocket.txt>.
+
+ To compile this driver as a module, choose M here: the
+ module will be called rocket.
+
+ If you want to compile this driver into the kernel, say Y here. If
+ you don't have a Comtrol RocketPort/RocketModem card installed, say N.
+
+config CYCLADES
+ tristate "Cyclades async mux support"
+ depends on SERIAL_NONSTANDARD && (PCI || ISA)
+ select FW_LOADER
+ ---help---
+ This driver supports Cyclades Z and Y multiserial boards.
+ You would need something like this to connect more than two modems to
+ your Linux box, for instance in order to become a dial-in server.
+
+ For information about the Cyclades-Z card, read
+ <file:Documentation/serial/README.cycladesZ>.
+
+ To compile this driver as a module, choose M here: the
+ module will be called cyclades.
+
+ If you haven't heard about it, it's safe to say N.
+
+config CYZ_INTR
+ bool "Cyclades-Z interrupt mode operation (EXPERIMENTAL)"
+ depends on EXPERIMENTAL && CYCLADES
+ help
+ The Cyclades-Z family of multiport cards allows 2 (two) driver op
+ modes: polling and interrupt. In polling mode, the driver will check
+ the status of the Cyclades-Z ports every certain amount of time
+ (which is called polling cycle and is configurable). In interrupt
+ mode, it will use an interrupt line (IRQ) in order to check the
+ status of the Cyclades-Z ports. The default op mode is polling. If
+ unsure, say N.
+
+config MOXA_INTELLIO
+ tristate "Moxa Intellio support"
+ depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
+ select FW_LOADER
+ help
+ Say Y here if you have a Moxa Intellio multiport serial card.
+
+ To compile this driver as a module, choose M here: the
+ module will be called moxa.
+
+config MOXA_SMARTIO
+ tristate "Moxa SmartIO support v. 2.0"
+ depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA)
+ help
+ Say Y here if you have a Moxa SmartIO multiport serial card and/or
+ want to help develop a new version of this driver.
+
+ This is upgraded (1.9.1) driver from original Moxa drivers with
+ changes finally resulting in PCI probing.
+
+ This driver can also be built as a module. The module will be called
+ mxser. If you want to do that, say M here.
+
+config SYNCLINK
+ tristate "Microgate SyncLink card support"
+ depends on SERIAL_NONSTANDARD && PCI && ISA_DMA_API
+ help
+ Provides support for the SyncLink ISA and PCI multiprotocol serial
+ adapters. These adapters support asynchronous and HDLC bit
+ synchronous communication up to 10Mbps (PCI adapter).
+
+ This driver can only be built as a module ( = code which can be
+ inserted in and removed from the running kernel whenever you want).
+ The module will be called synclink. If you want to do that, say M
+ here.
+
+config SYNCLINKMP
+ tristate "SyncLink Multiport support"
+ depends on SERIAL_NONSTANDARD && PCI
+ help
+ Enable support for the SyncLink Multiport (2 or 4 ports)
+ serial adapter, running asynchronous and HDLC communications up
+ to 2.048Mbps. Each ports is independently selectable for
+ RS-232, V.35, RS-449, RS-530, and X.21
+
+ This driver may be built as a module ( = code which can be
+ inserted in and removed from the running kernel whenever you want).
+ The module will be called synclinkmp. If you want to do that, say M
+ here.
+
+config SYNCLINK_GT
+ tristate "SyncLink GT/AC support"
+ depends on SERIAL_NONSTANDARD && PCI
+ help
+ Support for SyncLink GT and SyncLink AC families of
+ synchronous and asynchronous serial adapters
+ manufactured by Microgate Systems, Ltd. (www.microgate.com)
+
+config NOZOMI
+ tristate "HSDPA Broadband Wireless Data Card - Globe Trotter"
+ depends on PCI && EXPERIMENTAL
+ help
+ If you have a HSDPA driver Broadband Wireless Data Card -
+ Globe Trotter PCMCIA card, say Y here.
+
+ To compile this driver as a module, choose M here, the module
+ will be called nozomi.
+
+config ISI
+ tristate "Multi-Tech multiport card support (EXPERIMENTAL)"
+ depends on SERIAL_NONSTANDARD && PCI
+ select FW_LOADER
+ help
+ This is a driver for the Multi-Tech cards which provide several
+ serial ports. The driver is experimental and can currently only be
+ built as a module. The module will be called isicom.
+ If you want to do that, choose M here.
+
+config N_HDLC
+ tristate "HDLC line discipline support"
+ depends on SERIAL_NONSTANDARD
+ help
+ Allows synchronous HDLC communications with tty device drivers that
+ support synchronous HDLC such as the Microgate SyncLink adapter.
+
+ This driver can be built as a module ( = code which can be
+ inserted in and removed from the running kernel whenever you want).
+ The module will be called n_hdlc. If you want to do that, say M
+ here.
+
+config N_GSM
+ tristate "GSM MUX line discipline support (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+ depends on NET
+ help
+ This line discipline provides support for the GSM MUX protocol and
+ presents the mux as a set of 61 individual tty devices.
obj-y += vt/
obj-$(CONFIG_HVC_DRIVER) += hvc/
obj-y += serial/
+
+# tty drivers
+obj-$(CONFIG_AMIGA_BUILTIN_SERIAL) += amiserial.o
+obj-$(CONFIG_BFIN_JTAG_COMM) += bfin_jtag_comm.o
+obj-$(CONFIG_CYCLADES) += cyclades.o
+obj-$(CONFIG_ISI) += isicom.o
+obj-$(CONFIG_MOXA_INTELLIO) += moxa.o
+obj-$(CONFIG_MOXA_SMARTIO) += mxser.o
+obj-$(CONFIG_NOZOMI) += nozomi.o
+obj-$(CONFIG_ROCKETPORT) += rocket.o
+obj-$(CONFIG_SYNCLINK_GT) += synclink_gt.o
+obj-$(CONFIG_SYNCLINKMP) += synclinkmp.o
+obj-$(CONFIG_SYNCLINK) += synclink.o
--- /dev/null
+/*
+ * linux/drivers/char/amiserial.c
+ *
+ * Serial driver for the amiga builtin port.
+ *
+ * This code was created by taking serial.c version 4.30 from kernel
+ * release 2.3.22, replacing all hardware related stuff with the
+ * corresponding amiga hardware actions, and removing all irrelevant
+ * code. As a consequence, it uses many of the constants and names
+ * associated with the registers and bits of 16550 compatible UARTS -
+ * but only to keep track of status, etc in the state variables. It
+ * was done this was to make it easier to keep the code in line with
+ * (non hardware specific) changes to serial.c.
+ *
+ * The port is registered with the tty driver as minor device 64, and
+ * therefore other ports should should only use 65 upwards.
+ *
+ * Richard Lucock 28/12/99
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997,
+ * 1998, 1999 Theodore Ts'o
+ *
+ */
+
+/*
+ * Serial driver configuration section. Here are the various options:
+ *
+ * SERIAL_PARANOIA_CHECK
+ * Check the magic number for the async_structure where
+ * ever possible.
+ */
+
+#include <linux/delay.h>
+
+#undef SERIAL_PARANOIA_CHECK
+#define SERIAL_DO_RESTART
+
+/* Set of debugging defines */
+
+#undef SERIAL_DEBUG_INTR
+#undef SERIAL_DEBUG_OPEN
+#undef SERIAL_DEBUG_FLOW
+#undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+
+/* Sanity checks */
+
+#if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
+#define DBG_CNT(s) printk("(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
+ tty->name, (info->flags), serial_driver->refcount,info->count,tty->count,s)
+#else
+#define DBG_CNT(s)
+#endif
+
+/*
+ * End of serial driver configuration section.
+ */
+
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/serial.h>
+#include <linux/serialP.h>
+#include <linux/serial_reg.h>
+static char *serial_version = "4.30";
+
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/console.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/platform_device.h>
+
+#include <asm/setup.h>
+
+#include <asm/system.h>
+
+#include <asm/irq.h>
+
+#include <asm/amigahw.h>
+#include <asm/amigaints.h>
+
+#define custom amiga_custom
+static char *serial_name = "Amiga-builtin serial driver";
+
+static struct tty_driver *serial_driver;
+
+/* number of characters left in xmit buffer before we ask for more */
+#define WAKEUP_CHARS 256
+
+static struct async_struct *IRQ_ports;
+
+static unsigned char current_ctl_bits;
+
+static void change_speed(struct async_struct *info, struct ktermios *old);
+static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
+
+
+static struct serial_state rs_table[1];
+
+#define NR_PORTS ARRAY_SIZE(rs_table)
+
+#include <asm/uaccess.h>
+
+#define serial_isroot() (capable(CAP_SYS_ADMIN))
+
+
+static inline int serial_paranoia_check(struct async_struct *info,
+ char *name, const char *routine)
+{
+#ifdef SERIAL_PARANOIA_CHECK
+ static const char *badmagic =
+ "Warning: bad magic number for serial struct (%s) in %s\n";
+ static const char *badinfo =
+ "Warning: null async_struct for (%s) in %s\n";
+
+ if (!info) {
+ printk(badinfo, name, routine);
+ return 1;
+ }
+ if (info->magic != SERIAL_MAGIC) {
+ printk(badmagic, name, routine);
+ return 1;
+ }
+#endif
+ return 0;
+}
+
+/* some serial hardware definitions */
+#define SDR_OVRUN (1<<15)
+#define SDR_RBF (1<<14)
+#define SDR_TBE (1<<13)
+#define SDR_TSRE (1<<12)
+
+#define SERPER_PARENB (1<<15)
+
+#define AC_SETCLR (1<<15)
+#define AC_UARTBRK (1<<11)
+
+#define SER_DTR (1<<7)
+#define SER_RTS (1<<6)
+#define SER_DCD (1<<5)
+#define SER_CTS (1<<4)
+#define SER_DSR (1<<3)
+
+static __inline__ void rtsdtr_ctrl(int bits)
+{
+ ciab.pra = ((bits & (SER_RTS | SER_DTR)) ^ (SER_RTS | SER_DTR)) | (ciab.pra & ~(SER_RTS | SER_DTR));
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_stop() and rs_start()
+ *
+ * This routines are called before setting or resetting tty->stopped.
+ * They enable or disable transmitter interrupts, as necessary.
+ * ------------------------------------------------------------
+ */
+static void rs_stop(struct tty_struct *tty)
+{
+ struct async_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->name, "rs_stop"))
+ return;
+
+ local_irq_save(flags);
+ if (info->IER & UART_IER_THRI) {
+ info->IER &= ~UART_IER_THRI;
+ /* disable Tx interrupt and remove any pending interrupts */
+ custom.intena = IF_TBE;
+ mb();
+ custom.intreq = IF_TBE;
+ mb();
+ }
+ local_irq_restore(flags);
+}
+
+static void rs_start(struct tty_struct *tty)
+{
+ struct async_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->name, "rs_start"))
+ return;
+
+ local_irq_save(flags);
+ if (info->xmit.head != info->xmit.tail
+ && info->xmit.buf
+ && !(info->IER & UART_IER_THRI)) {
+ info->IER |= UART_IER_THRI;
+ custom.intena = IF_SETCLR | IF_TBE;
+ mb();
+ /* set a pending Tx Interrupt, transmitter should restart now */
+ custom.intreq = IF_SETCLR | IF_TBE;
+ mb();
+ }
+ local_irq_restore(flags);
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * Here starts the interrupt handling routines. All of the following
+ * subroutines are declared as inline and are folded into
+ * rs_interrupt(). They were separated out for readability's sake.
+ *
+ * Note: rs_interrupt() is a "fast" interrupt, which means that it
+ * runs with interrupts turned off. People who may want to modify
+ * rs_interrupt() should try to keep the interrupt handler as fast as
+ * possible. After you are done making modifications, it is not a bad
+ * idea to do:
+ *
+ * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
+ *
+ * and look at the resulting assemble code in serial.s.
+ *
+ * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
+ * -----------------------------------------------------------------------
+ */
+
+/*
+ * This routine is used by the interrupt handler to schedule
+ * processing in the software interrupt portion of the driver.
+ */
+static void rs_sched_event(struct async_struct *info,
+ int event)
+{
+ info->event |= 1 << event;
+ tasklet_schedule(&info->tlet);
+}
+
+static void receive_chars(struct async_struct *info)
+{
+ int status;
+ int serdatr;
+ struct tty_struct *tty = info->tty;
+ unsigned char ch, flag;
+ struct async_icount *icount;
+ int oe = 0;
+
+ icount = &info->state->icount;
+
+ status = UART_LSR_DR; /* We obviously have a character! */
+ serdatr = custom.serdatr;
+ mb();
+ custom.intreq = IF_RBF;
+ mb();
+
+ if((serdatr & 0x1ff) == 0)
+ status |= UART_LSR_BI;
+ if(serdatr & SDR_OVRUN)
+ status |= UART_LSR_OE;
+
+ ch = serdatr & 0xff;
+ icount->rx++;
+
+#ifdef SERIAL_DEBUG_INTR
+ printk("DR%02x:%02x...", ch, status);
+#endif
+ flag = TTY_NORMAL;
+
+ /*
+ * We don't handle parity or frame errors - but I have left
+ * the code in, since I'm not sure that the errors can't be
+ * detected.
+ */
+
+ if (status & (UART_LSR_BI | UART_LSR_PE |
+ UART_LSR_FE | UART_LSR_OE)) {
+ /*
+ * For statistics only
+ */
+ if (status & UART_LSR_BI) {
+ status &= ~(UART_LSR_FE | UART_LSR_PE);
+ icount->brk++;
+ } else if (status & UART_LSR_PE)
+ icount->parity++;
+ else if (status & UART_LSR_FE)
+ icount->frame++;
+ if (status & UART_LSR_OE)
+ icount->overrun++;
+
+ /*
+ * Now check to see if character should be
+ * ignored, and mask off conditions which
+ * should be ignored.
+ */
+ if (status & info->ignore_status_mask)
+ goto out;
+
+ status &= info->read_status_mask;
+
+ if (status & (UART_LSR_BI)) {
+#ifdef SERIAL_DEBUG_INTR
+ printk("handling break....");
+#endif
+ flag = TTY_BREAK;
+ if (info->flags & ASYNC_SAK)
+ do_SAK(tty);
+ } else if (status & UART_LSR_PE)
+ flag = TTY_PARITY;
+ else if (status & UART_LSR_FE)
+ flag = TTY_FRAME;
+ if (status & UART_LSR_OE) {
+ /*
+ * Overrun is special, since it's
+ * reported immediately, and doesn't
+ * affect the current character
+ */
+ oe = 1;
+ }
+ }
+ tty_insert_flip_char(tty, ch, flag);
+ if (oe == 1)
+ tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+ tty_flip_buffer_push(tty);
+out:
+ return;
+}
+
+static void transmit_chars(struct async_struct *info)
+{
+ custom.intreq = IF_TBE;
+ mb();
+ if (info->x_char) {
+ custom.serdat = info->x_char | 0x100;
+ mb();
+ info->state->icount.tx++;
+ info->x_char = 0;
+ return;
+ }
+ if (info->xmit.head == info->xmit.tail
+ || info->tty->stopped
+ || info->tty->hw_stopped) {
+ info->IER &= ~UART_IER_THRI;
+ custom.intena = IF_TBE;
+ mb();
+ return;
+ }
+
+ custom.serdat = info->xmit.buf[info->xmit.tail++] | 0x100;
+ mb();
+ info->xmit.tail = info->xmit.tail & (SERIAL_XMIT_SIZE-1);
+ info->state->icount.tx++;
+
+ if (CIRC_CNT(info->xmit.head,
+ info->xmit.tail,
+ SERIAL_XMIT_SIZE) < WAKEUP_CHARS)
+ rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
+
+#ifdef SERIAL_DEBUG_INTR
+ printk("THRE...");
+#endif
+ if (info->xmit.head == info->xmit.tail) {
+ custom.intena = IF_TBE;
+ mb();
+ info->IER &= ~UART_IER_THRI;
+ }
+}
+
+static void check_modem_status(struct async_struct *info)
+{
+ unsigned char status = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
+ unsigned char dstatus;
+ struct async_icount *icount;
+
+ /* Determine bits that have changed */
+ dstatus = status ^ current_ctl_bits;
+ current_ctl_bits = status;
+
+ if (dstatus) {
+ icount = &info->state->icount;
+ /* update input line counters */
+ if (dstatus & SER_DSR)
+ icount->dsr++;
+ if (dstatus & SER_DCD) {
+ icount->dcd++;
+#ifdef CONFIG_HARD_PPS
+ if ((info->flags & ASYNC_HARDPPS_CD) &&
+ !(status & SER_DCD))
+ hardpps();
+#endif
+ }
+ if (dstatus & SER_CTS)
+ icount->cts++;
+ wake_up_interruptible(&info->delta_msr_wait);
+ }
+
+ if ((info->flags & ASYNC_CHECK_CD) && (dstatus & SER_DCD)) {
+#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
+ printk("ttyS%d CD now %s...", info->line,
+ (!(status & SER_DCD)) ? "on" : "off");
+#endif
+ if (!(status & SER_DCD))
+ wake_up_interruptible(&info->open_wait);
+ else {
+#ifdef SERIAL_DEBUG_OPEN
+ printk("doing serial hangup...");
+#endif
+ if (info->tty)
+ tty_hangup(info->tty);
+ }
+ }
+ if (info->flags & ASYNC_CTS_FLOW) {
+ if (info->tty->hw_stopped) {
+ if (!(status & SER_CTS)) {
+#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
+ printk("CTS tx start...");
+#endif
+ info->tty->hw_stopped = 0;
+ info->IER |= UART_IER_THRI;
+ custom.intena = IF_SETCLR | IF_TBE;
+ mb();
+ /* set a pending Tx Interrupt, transmitter should restart now */
+ custom.intreq = IF_SETCLR | IF_TBE;
+ mb();
+ rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
+ return;
+ }
+ } else {
+ if ((status & SER_CTS)) {
+#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
+ printk("CTS tx stop...");
+#endif
+ info->tty->hw_stopped = 1;
+ info->IER &= ~UART_IER_THRI;
+ /* disable Tx interrupt and remove any pending interrupts */
+ custom.intena = IF_TBE;
+ mb();
+ custom.intreq = IF_TBE;
+ mb();
+ }
+ }
+ }
+}
+
+static irqreturn_t ser_vbl_int( int irq, void *data)
+{
+ /* vbl is just a periodic interrupt we tie into to update modem status */
+ struct async_struct * info = IRQ_ports;
+ /*
+ * TBD - is it better to unregister from this interrupt or to
+ * ignore it if MSI is clear ?
+ */
+ if(info->IER & UART_IER_MSI)
+ check_modem_status(info);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t ser_rx_int(int irq, void *dev_id)
+{
+ struct async_struct * info;
+
+#ifdef SERIAL_DEBUG_INTR
+ printk("ser_rx_int...");
+#endif
+
+ info = IRQ_ports;
+ if (!info || !info->tty)
+ return IRQ_NONE;
+
+ receive_chars(info);
+ info->last_active = jiffies;
+#ifdef SERIAL_DEBUG_INTR
+ printk("end.\n");
+#endif
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t ser_tx_int(int irq, void *dev_id)
+{
+ struct async_struct * info;
+
+ if (custom.serdatr & SDR_TBE) {
+#ifdef SERIAL_DEBUG_INTR
+ printk("ser_tx_int...");
+#endif
+
+ info = IRQ_ports;
+ if (!info || !info->tty)
+ return IRQ_NONE;
+
+ transmit_chars(info);
+ info->last_active = jiffies;
+#ifdef SERIAL_DEBUG_INTR
+ printk("end.\n");
+#endif
+ }
+ return IRQ_HANDLED;
+}
+
+/*
+ * -------------------------------------------------------------------
+ * Here ends the serial interrupt routines.
+ * -------------------------------------------------------------------
+ */
+
+/*
+ * This routine is used to handle the "bottom half" processing for the
+ * serial driver, known also the "software interrupt" processing.
+ * This processing is done at the kernel interrupt level, after the
+ * rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
+ * is where time-consuming activities which can not be done in the
+ * interrupt driver proper are done; the interrupt driver schedules
+ * them using rs_sched_event(), and they get done here.
+ */
+
+static void do_softint(unsigned long private_)
+{
+ struct async_struct *info = (struct async_struct *) private_;
+ struct tty_struct *tty;
+
+ tty = info->tty;
+ if (!tty)
+ return;
+
+ if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event))
+ tty_wakeup(tty);
+}
+
+/*
+ * ---------------------------------------------------------------
+ * Low level utility subroutines for the serial driver: routines to
+ * figure out the appropriate timeout for an interrupt chain, routines
+ * to initialize and startup a serial port, and routines to shutdown a
+ * serial port. Useful stuff like that.
+ * ---------------------------------------------------------------
+ */
+
+static int startup(struct async_struct * info)
+{
+ unsigned long flags;
+ int retval=0;
+ unsigned long page;
+
+ page = get_zeroed_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ local_irq_save(flags);
+
+ if (info->flags & ASYNC_INITIALIZED) {
+ free_page(page);
+ goto errout;
+ }
+
+ if (info->xmit.buf)
+ free_page(page);
+ else
+ info->xmit.buf = (unsigned char *) page;
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("starting up ttys%d ...", info->line);
+#endif
+
+ /* Clear anything in the input buffer */
+
+ custom.intreq = IF_RBF;
+ mb();
+
+ retval = request_irq(IRQ_AMIGA_VERTB, ser_vbl_int, 0, "serial status", info);
+ if (retval) {
+ if (serial_isroot()) {
+ if (info->tty)
+ set_bit(TTY_IO_ERROR,
+ &info->tty->flags);
+ retval = 0;
+ }
+ goto errout;
+ }
+
+ /* enable both Rx and Tx interrupts */
+ custom.intena = IF_SETCLR | IF_RBF | IF_TBE;
+ mb();
+ info->IER = UART_IER_MSI;
+
+ /* remember current state of the DCD and CTS bits */
+ current_ctl_bits = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
+
+ IRQ_ports = info;
+
+ info->MCR = 0;
+ if (info->tty->termios->c_cflag & CBAUD)
+ info->MCR = SER_DTR | SER_RTS;
+ rtsdtr_ctrl(info->MCR);
+
+ if (info->tty)
+ clear_bit(TTY_IO_ERROR, &info->tty->flags);
+ info->xmit.head = info->xmit.tail = 0;
+
+ /*
+ * Set up the tty->alt_speed kludge
+ */
+ if (info->tty) {
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ info->tty->alt_speed = 57600;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ info->tty->alt_speed = 115200;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+ info->tty->alt_speed = 230400;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+ info->tty->alt_speed = 460800;
+ }
+
+ /*
+ * and set the speed of the serial port
+ */
+ change_speed(info, NULL);
+
+ info->flags |= ASYNC_INITIALIZED;
+ local_irq_restore(flags);
+ return 0;
+
+errout:
+ local_irq_restore(flags);
+ return retval;
+}
+
+/*
+ * This routine will shutdown a serial port; interrupts are disabled, and
+ * DTR is dropped if the hangup on close termio flag is on.
+ */
+static void shutdown(struct async_struct * info)
+{
+ unsigned long flags;
+ struct serial_state *state;
+
+ if (!(info->flags & ASYNC_INITIALIZED))
+ return;
+
+ state = info->state;
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("Shutting down serial port %d ....\n", info->line);
+#endif
+
+ local_irq_save(flags); /* Disable interrupts */
+
+ /*
+ * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
+ * here so the queue might never be waken up
+ */
+ wake_up_interruptible(&info->delta_msr_wait);
+
+ IRQ_ports = NULL;
+
+ /*
+ * Free the IRQ, if necessary
+ */
+ free_irq(IRQ_AMIGA_VERTB, info);
+
+ if (info->xmit.buf) {
+ free_page((unsigned long) info->xmit.buf);
+ info->xmit.buf = NULL;
+ }
+
+ info->IER = 0;
+ custom.intena = IF_RBF | IF_TBE;
+ mb();
+
+ /* disable break condition */
+ custom.adkcon = AC_UARTBRK;
+ mb();
+
+ if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
+ info->MCR &= ~(SER_DTR|SER_RTS);
+ rtsdtr_ctrl(info->MCR);
+
+ if (info->tty)
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+
+ info->flags &= ~ASYNC_INITIALIZED;
+ local_irq_restore(flags);
+}
+
+
+/*
+ * This routine is called to set the UART divisor registers to match
+ * the specified baud rate for a serial port.
+ */
+static void change_speed(struct async_struct *info,
+ struct ktermios *old_termios)
+{
+ int quot = 0, baud_base, baud;
+ unsigned cflag, cval = 0;
+ int bits;
+ unsigned long flags;
+
+ if (!info->tty || !info->tty->termios)
+ return;
+ cflag = info->tty->termios->c_cflag;
+
+ /* Byte size is always 8 bits plus parity bit if requested */
+
+ cval = 3; bits = 10;
+ if (cflag & CSTOPB) {
+ cval |= 0x04;
+ bits++;
+ }
+ if (cflag & PARENB) {
+ cval |= UART_LCR_PARITY;
+ bits++;
+ }
+ if (!(cflag & PARODD))
+ cval |= UART_LCR_EPAR;
+#ifdef CMSPAR
+ if (cflag & CMSPAR)
+ cval |= UART_LCR_SPAR;
+#endif
+
+ /* Determine divisor based on baud rate */
+ baud = tty_get_baud_rate(info->tty);
+ if (!baud)
+ baud = 9600; /* B0 transition handled in rs_set_termios */
+ baud_base = info->state->baud_base;
+ if (baud == 38400 &&
+ ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST))
+ quot = info->state->custom_divisor;
+ else {
+ if (baud == 134)
+ /* Special case since 134 is really 134.5 */
+ quot = (2*baud_base / 269);
+ else if (baud)
+ quot = baud_base / baud;
+ }
+ /* If the quotient is zero refuse the change */
+ if (!quot && old_termios) {
+ /* FIXME: Will need updating for new tty in the end */
+ info->tty->termios->c_cflag &= ~CBAUD;
+ info->tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD);
+ baud = tty_get_baud_rate(info->tty);
+ if (!baud)
+ baud = 9600;
+ if (baud == 38400 &&
+ ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST))
+ quot = info->state->custom_divisor;
+ else {
+ if (baud == 134)
+ /* Special case since 134 is really 134.5 */
+ quot = (2*baud_base / 269);
+ else if (baud)
+ quot = baud_base / baud;
+ }
+ }
+ /* As a last resort, if the quotient is zero, default to 9600 bps */
+ if (!quot)
+ quot = baud_base / 9600;
+ info->quot = quot;
+ info->timeout = ((info->xmit_fifo_size*HZ*bits*quot) / baud_base);
+ info->timeout += HZ/50; /* Add .02 seconds of slop */
+
+ /* CTS flow control flag and modem status interrupts */
+ info->IER &= ~UART_IER_MSI;
+ if (info->flags & ASYNC_HARDPPS_CD)
+ info->IER |= UART_IER_MSI;
+ if (cflag & CRTSCTS) {
+ info->flags |= ASYNC_CTS_FLOW;
+ info->IER |= UART_IER_MSI;
+ } else
+ info->flags &= ~ASYNC_CTS_FLOW;
+ if (cflag & CLOCAL)
+ info->flags &= ~ASYNC_CHECK_CD;
+ else {
+ info->flags |= ASYNC_CHECK_CD;
+ info->IER |= UART_IER_MSI;
+ }
+ /* TBD:
+ * Does clearing IER_MSI imply that we should disable the VBL interrupt ?
+ */
+
+ /*
+ * Set up parity check flag
+ */
+
+ info->read_status_mask = UART_LSR_OE | UART_LSR_DR;
+ if (I_INPCK(info->tty))
+ info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+ if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
+ info->read_status_mask |= UART_LSR_BI;
+
+ /*
+ * Characters to ignore
+ */
+ info->ignore_status_mask = 0;
+ if (I_IGNPAR(info->tty))
+ info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
+ if (I_IGNBRK(info->tty)) {
+ info->ignore_status_mask |= UART_LSR_BI;
+ /*
+ * If we're ignore parity and break indicators, ignore
+ * overruns too. (For real raw support).
+ */
+ if (I_IGNPAR(info->tty))
+ info->ignore_status_mask |= UART_LSR_OE;
+ }
+ /*
+ * !!! ignore all characters if CREAD is not set
+ */
+ if ((cflag & CREAD) == 0)
+ info->ignore_status_mask |= UART_LSR_DR;
+ local_irq_save(flags);
+
+ {
+ short serper;
+
+ /* Set up the baud rate */
+ serper = quot - 1;
+
+ /* Enable or disable parity bit */
+
+ if(cval & UART_LCR_PARITY)
+ serper |= (SERPER_PARENB);
+
+ custom.serper = serper;
+ mb();
+ }
+
+ info->LCR = cval; /* Save LCR */
+ local_irq_restore(flags);
+}
+
+static int rs_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct async_struct *info;
+ unsigned long flags;
+
+ info = tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->name, "rs_put_char"))
+ return 0;
+
+ if (!info->xmit.buf)
+ return 0;
+
+ local_irq_save(flags);
+ if (CIRC_SPACE(info->xmit.head,
+ info->xmit.tail,
+ SERIAL_XMIT_SIZE) == 0) {
+ local_irq_restore(flags);
+ return 0;
+ }
+
+ info->xmit.buf[info->xmit.head++] = ch;
+ info->xmit.head &= SERIAL_XMIT_SIZE-1;
+ local_irq_restore(flags);
+ return 1;
+}
+
+static void rs_flush_chars(struct tty_struct *tty)
+{
+ struct async_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->name, "rs_flush_chars"))
+ return;
+
+ if (info->xmit.head == info->xmit.tail
+ || tty->stopped
+ || tty->hw_stopped
+ || !info->xmit.buf)
+ return;
+
+ local_irq_save(flags);
+ info->IER |= UART_IER_THRI;
+ custom.intena = IF_SETCLR | IF_TBE;
+ mb();
+ /* set a pending Tx Interrupt, transmitter should restart now */
+ custom.intreq = IF_SETCLR | IF_TBE;
+ mb();
+ local_irq_restore(flags);
+}
+
+static int rs_write(struct tty_struct * tty, const unsigned char *buf, int count)
+{
+ int c, ret = 0;
+ struct async_struct *info;
+ unsigned long flags;
+
+ info = tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->name, "rs_write"))
+ return 0;
+
+ if (!info->xmit.buf)
+ return 0;
+
+ local_irq_save(flags);
+ while (1) {
+ c = CIRC_SPACE_TO_END(info->xmit.head,
+ info->xmit.tail,
+ SERIAL_XMIT_SIZE);
+ if (count < c)
+ c = count;
+ if (c <= 0) {
+ break;
+ }
+ memcpy(info->xmit.buf + info->xmit.head, buf, c);
+ info->xmit.head = ((info->xmit.head + c) &
+ (SERIAL_XMIT_SIZE-1));
+ buf += c;
+ count -= c;
+ ret += c;
+ }
+ local_irq_restore(flags);
+
+ if (info->xmit.head != info->xmit.tail
+ && !tty->stopped
+ && !tty->hw_stopped
+ && !(info->IER & UART_IER_THRI)) {
+ info->IER |= UART_IER_THRI;
+ local_irq_disable();
+ custom.intena = IF_SETCLR | IF_TBE;
+ mb();
+ /* set a pending Tx Interrupt, transmitter should restart now */
+ custom.intreq = IF_SETCLR | IF_TBE;
+ mb();
+ local_irq_restore(flags);
+ }
+ return ret;
+}
+
+static int rs_write_room(struct tty_struct *tty)
+{
+ struct async_struct *info = tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->name, "rs_write_room"))
+ return 0;
+ return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
+}
+
+static int rs_chars_in_buffer(struct tty_struct *tty)
+{
+ struct async_struct *info = tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
+ return 0;
+ return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
+}
+
+static void rs_flush_buffer(struct tty_struct *tty)
+{
+ struct async_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
+ return;
+ local_irq_save(flags);
+ info->xmit.head = info->xmit.tail = 0;
+ local_irq_restore(flags);
+ tty_wakeup(tty);
+}
+
+/*
+ * This function is used to send a high-priority XON/XOFF character to
+ * the device
+ */
+static void rs_send_xchar(struct tty_struct *tty, char ch)
+{
+ struct async_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->name, "rs_send_char"))
+ return;
+
+ info->x_char = ch;
+ if (ch) {
+ /* Make sure transmit interrupts are on */
+
+ /* Check this ! */
+ local_irq_save(flags);
+ if(!(custom.intenar & IF_TBE)) {
+ custom.intena = IF_SETCLR | IF_TBE;
+ mb();
+ /* set a pending Tx Interrupt, transmitter should restart now */
+ custom.intreq = IF_SETCLR | IF_TBE;
+ mb();
+ }
+ local_irq_restore(flags);
+
+ info->IER |= UART_IER_THRI;
+ }
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_throttle()
+ *
+ * This routine is called by the upper-layer tty layer to signal that
+ * incoming characters should be throttled.
+ * ------------------------------------------------------------
+ */
+static void rs_throttle(struct tty_struct * tty)
+{
+ struct async_struct *info = tty->driver_data;
+ unsigned long flags;
+#ifdef SERIAL_DEBUG_THROTTLE
+ char buf[64];
+
+ printk("throttle %s: %d....\n", tty_name(tty, buf),
+ tty->ldisc.chars_in_buffer(tty));
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "rs_throttle"))
+ return;
+
+ if (I_IXOFF(tty))
+ rs_send_xchar(tty, STOP_CHAR(tty));
+
+ if (tty->termios->c_cflag & CRTSCTS)
+ info->MCR &= ~SER_RTS;
+
+ local_irq_save(flags);
+ rtsdtr_ctrl(info->MCR);
+ local_irq_restore(flags);
+}
+
+static void rs_unthrottle(struct tty_struct * tty)
+{
+ struct async_struct *info = tty->driver_data;
+ unsigned long flags;
+#ifdef SERIAL_DEBUG_THROTTLE
+ char buf[64];
+
+ printk("unthrottle %s: %d....\n", tty_name(tty, buf),
+ tty->ldisc.chars_in_buffer(tty));
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
+ return;
+
+ if (I_IXOFF(tty)) {
+ if (info->x_char)
+ info->x_char = 0;
+ else
+ rs_send_xchar(tty, START_CHAR(tty));
+ }
+ if (tty->termios->c_cflag & CRTSCTS)
+ info->MCR |= SER_RTS;
+ local_irq_save(flags);
+ rtsdtr_ctrl(info->MCR);
+ local_irq_restore(flags);
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_ioctl() and friends
+ * ------------------------------------------------------------
+ */
+
+static int get_serial_info(struct async_struct * info,
+ struct serial_struct __user * retinfo)
+{
+ struct serial_struct tmp;
+ struct serial_state *state = info->state;
+
+ if (!retinfo)
+ return -EFAULT;
+ memset(&tmp, 0, sizeof(tmp));
+ tty_lock();
+ tmp.type = state->type;
+ tmp.line = state->line;
+ tmp.port = state->port;
+ tmp.irq = state->irq;
+ tmp.flags = state->flags;
+ tmp.xmit_fifo_size = state->xmit_fifo_size;
+ tmp.baud_base = state->baud_base;
+ tmp.close_delay = state->close_delay;
+ tmp.closing_wait = state->closing_wait;
+ tmp.custom_divisor = state->custom_divisor;
+ tty_unlock();
+ if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
+ return -EFAULT;
+ return 0;
+}
+
+static int set_serial_info(struct async_struct * info,
+ struct serial_struct __user * new_info)
+{
+ struct serial_struct new_serial;
+ struct serial_state old_state, *state;
+ unsigned int change_irq,change_port;
+ int retval = 0;
+
+ if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
+ return -EFAULT;
+
+ tty_lock();
+ state = info->state;
+ old_state = *state;
+
+ change_irq = new_serial.irq != state->irq;
+ change_port = (new_serial.port != state->port);
+ if(change_irq || change_port || (new_serial.xmit_fifo_size != state->xmit_fifo_size)) {
+ tty_unlock();
+ return -EINVAL;
+ }
+
+ if (!serial_isroot()) {
+ if ((new_serial.baud_base != state->baud_base) ||
+ (new_serial.close_delay != state->close_delay) ||
+ (new_serial.xmit_fifo_size != state->xmit_fifo_size) ||
+ ((new_serial.flags & ~ASYNC_USR_MASK) !=
+ (state->flags & ~ASYNC_USR_MASK)))
+ return -EPERM;
+ state->flags = ((state->flags & ~ASYNC_USR_MASK) |
+ (new_serial.flags & ASYNC_USR_MASK));
+ info->flags = ((info->flags & ~ASYNC_USR_MASK) |
+ (new_serial.flags & ASYNC_USR_MASK));
+ state->custom_divisor = new_serial.custom_divisor;
+ goto check_and_exit;
+ }
+
+ if (new_serial.baud_base < 9600) {
+ tty_unlock();
+ return -EINVAL;
+ }
+
+ /*
+ * OK, past this point, all the error checking has been done.
+ * At this point, we start making changes.....
+ */
+
+ state->baud_base = new_serial.baud_base;
+ state->flags = ((state->flags & ~ASYNC_FLAGS) |
+ (new_serial.flags & ASYNC_FLAGS));
+ info->flags = ((state->flags & ~ASYNC_INTERNAL_FLAGS) |
+ (info->flags & ASYNC_INTERNAL_FLAGS));
+ state->custom_divisor = new_serial.custom_divisor;
+ state->close_delay = new_serial.close_delay * HZ/100;
+ state->closing_wait = new_serial.closing_wait * HZ/100;
+ info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+
+check_and_exit:
+ if (info->flags & ASYNC_INITIALIZED) {
+ if (((old_state.flags & ASYNC_SPD_MASK) !=
+ (state->flags & ASYNC_SPD_MASK)) ||
+ (old_state.custom_divisor != state->custom_divisor)) {
+ if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ info->tty->alt_speed = 57600;
+ if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ info->tty->alt_speed = 115200;
+ if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+ info->tty->alt_speed = 230400;
+ if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+ info->tty->alt_speed = 460800;
+ change_speed(info, NULL);
+ }
+ } else
+ retval = startup(info);
+ tty_unlock();
+ return retval;
+}
+
+
+/*
+ * get_lsr_info - get line status register info
+ *
+ * Purpose: Let user call ioctl() to get info when the UART physically
+ * is emptied. On bus types like RS485, the transmitter must
+ * release the bus after transmitting. This must be done when
+ * the transmit shift register is empty, not be done when the
+ * transmit holding register is empty. This functionality
+ * allows an RS485 driver to be written in user space.
+ */
+static int get_lsr_info(struct async_struct * info, unsigned int __user *value)
+{
+ unsigned char status;
+ unsigned int result;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ status = custom.serdatr;
+ mb();
+ local_irq_restore(flags);
+ result = ((status & SDR_TSRE) ? TIOCSER_TEMT : 0);
+ if (copy_to_user(value, &result, sizeof(int)))
+ return -EFAULT;
+ return 0;
+}
+
+
+static int rs_tiocmget(struct tty_struct *tty)
+{
+ struct async_struct * info = tty->driver_data;
+ unsigned char control, status;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
+ return -ENODEV;
+ if (tty->flags & (1 << TTY_IO_ERROR))
+ return -EIO;
+
+ control = info->MCR;
+ local_irq_save(flags);
+ status = ciab.pra;
+ local_irq_restore(flags);
+ return ((control & SER_RTS) ? TIOCM_RTS : 0)
+ | ((control & SER_DTR) ? TIOCM_DTR : 0)
+ | (!(status & SER_DCD) ? TIOCM_CAR : 0)
+ | (!(status & SER_DSR) ? TIOCM_DSR : 0)
+ | (!(status & SER_CTS) ? TIOCM_CTS : 0);
+}
+
+static int rs_tiocmset(struct tty_struct *tty, unsigned int set,
+ unsigned int clear)
+{
+ struct async_struct * info = tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
+ return -ENODEV;
+ if (tty->flags & (1 << TTY_IO_ERROR))
+ return -EIO;
+
+ local_irq_save(flags);
+ if (set & TIOCM_RTS)
+ info->MCR |= SER_RTS;
+ if (set & TIOCM_DTR)
+ info->MCR |= SER_DTR;
+ if (clear & TIOCM_RTS)
+ info->MCR &= ~SER_RTS;
+ if (clear & TIOCM_DTR)
+ info->MCR &= ~SER_DTR;
+ rtsdtr_ctrl(info->MCR);
+ local_irq_restore(flags);
+ return 0;
+}
+
+/*
+ * rs_break() --- routine which turns the break handling on or off
+ */
+static int rs_break(struct tty_struct *tty, int break_state)
+{
+ struct async_struct * info = tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->name, "rs_break"))
+ return -EINVAL;
+
+ local_irq_save(flags);
+ if (break_state == -1)
+ custom.adkcon = AC_SETCLR | AC_UARTBRK;
+ else
+ custom.adkcon = AC_UARTBRK;
+ mb();
+ local_irq_restore(flags);
+ return 0;
+}
+
+/*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for
+ * RI where only 0->1 is counted.
+ */
+static int rs_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ struct async_struct *info = tty->driver_data;
+ struct async_icount cnow;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ cnow = info->state->icount;
+ local_irq_restore(flags);
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+
+ return 0;
+}
+
+static int rs_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct async_struct * info = tty->driver_data;
+ struct async_icount cprev, cnow; /* kernel counter temps */
+ void __user *argp = (void __user *)arg;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
+ return -ENODEV;
+
+ if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
+ (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
+ (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
+ if (tty->flags & (1 << TTY_IO_ERROR))
+ return -EIO;
+ }
+
+ switch (cmd) {
+ case TIOCGSERIAL:
+ return get_serial_info(info, argp);
+ case TIOCSSERIAL:
+ return set_serial_info(info, argp);
+ case TIOCSERCONFIG:
+ return 0;
+
+ case TIOCSERGETLSR: /* Get line status register */
+ return get_lsr_info(info, argp);
+
+ case TIOCSERGSTRUCT:
+ if (copy_to_user(argp,
+ info, sizeof(struct async_struct)))
+ return -EFAULT;
+ return 0;
+
+ /*
+ * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
+ * - mask passed in arg for lines of interest
+ * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
+ * Caller should use TIOCGICOUNT to see which one it was
+ */
+ case TIOCMIWAIT:
+ local_irq_save(flags);
+ /* note the counters on entry */
+ cprev = info->state->icount;
+ local_irq_restore(flags);
+ while (1) {
+ interruptible_sleep_on(&info->delta_msr_wait);
+ /* see if a signal did it */
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ local_irq_save(flags);
+ cnow = info->state->icount; /* atomic copy */
+ local_irq_restore(flags);
+ if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
+ cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
+ return -EIO; /* no change => error */
+ if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
+ ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
+ ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
+ ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
+ return 0;
+ }
+ cprev = cnow;
+ }
+ /* NOTREACHED */
+
+ case TIOCSERGWILD:
+ case TIOCSERSWILD:
+ /* "setserial -W" is called in Debian boot */
+ printk ("TIOCSER?WILD ioctl obsolete, ignored.\n");
+ return 0;
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+{
+ struct async_struct *info = tty->driver_data;
+ unsigned long flags;
+ unsigned int cflag = tty->termios->c_cflag;
+
+ change_speed(info, old_termios);
+
+ /* Handle transition to B0 status */
+ if ((old_termios->c_cflag & CBAUD) &&
+ !(cflag & CBAUD)) {
+ info->MCR &= ~(SER_DTR|SER_RTS);
+ local_irq_save(flags);
+ rtsdtr_ctrl(info->MCR);
+ local_irq_restore(flags);
+ }
+
+ /* Handle transition away from B0 status */
+ if (!(old_termios->c_cflag & CBAUD) &&
+ (cflag & CBAUD)) {
+ info->MCR |= SER_DTR;
+ if (!(tty->termios->c_cflag & CRTSCTS) ||
+ !test_bit(TTY_THROTTLED, &tty->flags)) {
+ info->MCR |= SER_RTS;
+ }
+ local_irq_save(flags);
+ rtsdtr_ctrl(info->MCR);
+ local_irq_restore(flags);
+ }
+
+ /* Handle turning off CRTSCTS */
+ if ((old_termios->c_cflag & CRTSCTS) &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ rs_start(tty);
+ }
+
+#if 0
+ /*
+ * No need to wake up processes in open wait, since they
+ * sample the CLOCAL flag once, and don't recheck it.
+ * XXX It's not clear whether the current behavior is correct
+ * or not. Hence, this may change.....
+ */
+ if (!(old_termios->c_cflag & CLOCAL) &&
+ (tty->termios->c_cflag & CLOCAL))
+ wake_up_interruptible(&info->open_wait);
+#endif
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_close()
+ *
+ * This routine is called when the serial port gets closed. First, we
+ * wait for the last remaining data to be sent. Then, we unlink its
+ * async structure from the interrupt chain if necessary, and we free
+ * that IRQ if nothing is left in the chain.
+ * ------------------------------------------------------------
+ */
+static void rs_close(struct tty_struct *tty, struct file * filp)
+{
+ struct async_struct * info = tty->driver_data;
+ struct serial_state *state;
+ unsigned long flags;
+
+ if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
+ return;
+
+ state = info->state;
+
+ local_irq_save(flags);
+
+ if (tty_hung_up_p(filp)) {
+ DBG_CNT("before DEC-hung");
+ local_irq_restore(flags);
+ return;
+ }
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("rs_close ttys%d, count = %d\n", info->line, state->count);
+#endif
+ if ((tty->count == 1) && (state->count != 1)) {
+ /*
+ * Uh, oh. tty->count is 1, which means that the tty
+ * structure will be freed. state->count should always
+ * be one in these conditions. If it's greater than
+ * one, we've got real problems, since it means the
+ * serial port won't be shutdown.
+ */
+ printk("rs_close: bad serial port count; tty->count is 1, "
+ "state->count is %d\n", state->count);
+ state->count = 1;
+ }
+ if (--state->count < 0) {
+ printk("rs_close: bad serial port count for ttys%d: %d\n",
+ info->line, state->count);
+ state->count = 0;
+ }
+ if (state->count) {
+ DBG_CNT("before DEC-2");
+ local_irq_restore(flags);
+ return;
+ }
+ info->flags |= ASYNC_CLOSING;
+ /*
+ * Now we wait for the transmit buffer to clear; and we notify
+ * the line discipline to only process XON/XOFF characters.
+ */
+ tty->closing = 1;
+ if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+ tty_wait_until_sent(tty, info->closing_wait);
+ /*
+ * At this point we stop accepting input. To do this, we
+ * disable the receive line status interrupts, and tell the
+ * interrupt driver to stop checking the data ready bit in the
+ * line status register.
+ */
+ info->read_status_mask &= ~UART_LSR_DR;
+ if (info->flags & ASYNC_INITIALIZED) {
+ /* disable receive interrupts */
+ custom.intena = IF_RBF;
+ mb();
+ /* clear any pending receive interrupt */
+ custom.intreq = IF_RBF;
+ mb();
+
+ /*
+ * Before we drop DTR, make sure the UART transmitter
+ * has completely drained; this is especially
+ * important if there is a transmit FIFO!
+ */
+ rs_wait_until_sent(tty, info->timeout);
+ }
+ shutdown(info);
+ rs_flush_buffer(tty);
+
+ tty_ldisc_flush(tty);
+ tty->closing = 0;
+ info->event = 0;
+ info->tty = NULL;
+ if (info->blocked_open) {
+ if (info->close_delay) {
+ msleep_interruptible(jiffies_to_msecs(info->close_delay));
+ }
+ wake_up_interruptible(&info->open_wait);
+ }
+ info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+ wake_up_interruptible(&info->close_wait);
+ local_irq_restore(flags);
+}
+
+/*
+ * rs_wait_until_sent() --- wait until the transmitter is empty
+ */
+static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ struct async_struct * info = tty->driver_data;
+ unsigned long orig_jiffies, char_time;
+ int tty_was_locked = tty_locked();
+ int lsr;
+
+ if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
+ return;
+
+ if (info->xmit_fifo_size == 0)
+ return; /* Just in case.... */
+
+ orig_jiffies = jiffies;
+
+ /*
+ * tty_wait_until_sent is called from lots of places,
+ * with or without the BTM.
+ */
+ if (!tty_was_locked)
+ tty_lock();
+ /*
+ * Set the check interval to be 1/5 of the estimated time to
+ * send a single character, and make it at least 1. The check
+ * interval should also be less than the timeout.
+ *
+ * Note: we have to use pretty tight timings here to satisfy
+ * the NIST-PCTS.
+ */
+ char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
+ char_time = char_time / 5;
+ if (char_time == 0)
+ char_time = 1;
+ if (timeout)
+ char_time = min_t(unsigned long, char_time, timeout);
+ /*
+ * If the transmitter hasn't cleared in twice the approximate
+ * amount of time to send the entire FIFO, it probably won't
+ * ever clear. This assumes the UART isn't doing flow
+ * control, which is currently the case. Hence, if it ever
+ * takes longer than info->timeout, this is probably due to a
+ * UART bug of some kind. So, we clamp the timeout parameter at
+ * 2*info->timeout.
+ */
+ if (!timeout || timeout > 2*info->timeout)
+ timeout = 2*info->timeout;
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+ printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
+ printk("jiff=%lu...", jiffies);
+#endif
+ while(!((lsr = custom.serdatr) & SDR_TSRE)) {
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+ printk("serdatr = %d (jiff=%lu)...", lsr, jiffies);
+#endif
+ msleep_interruptible(jiffies_to_msecs(char_time));
+ if (signal_pending(current))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies + timeout))
+ break;
+ }
+ __set_current_state(TASK_RUNNING);
+ if (!tty_was_locked)
+ tty_unlock();
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+ printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
+#endif
+}
+
+/*
+ * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+static void rs_hangup(struct tty_struct *tty)
+{
+ struct async_struct * info = tty->driver_data;
+ struct serial_state *state = info->state;
+
+ if (serial_paranoia_check(info, tty->name, "rs_hangup"))
+ return;
+
+ state = info->state;
+
+ rs_flush_buffer(tty);
+ shutdown(info);
+ info->event = 0;
+ state->count = 0;
+ info->flags &= ~ASYNC_NORMAL_ACTIVE;
+ info->tty = NULL;
+ wake_up_interruptible(&info->open_wait);
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_open() and friends
+ * ------------------------------------------------------------
+ */
+static int block_til_ready(struct tty_struct *tty, struct file * filp,
+ struct async_struct *info)
+{
+#ifdef DECLARE_WAITQUEUE
+ DECLARE_WAITQUEUE(wait, current);
+#else
+ struct wait_queue wait = { current, NULL };
+#endif
+ struct serial_state *state = info->state;
+ int retval;
+ int do_clocal = 0, extra_count = 0;
+ unsigned long flags;
+
+ /*
+ * If the device is in the middle of being closed, then block
+ * until it's done, and then try again.
+ */
+ if (tty_hung_up_p(filp) ||
+ (info->flags & ASYNC_CLOSING)) {
+ if (info->flags & ASYNC_CLOSING)
+ interruptible_sleep_on(&info->close_wait);
+#ifdef SERIAL_DO_RESTART
+ return ((info->flags & ASYNC_HUP_NOTIFY) ?
+ -EAGAIN : -ERESTARTSYS);
+#else
+ return -EAGAIN;
+#endif
+ }
+
+ /*
+ * If non-blocking mode is set, or the port is not enabled,
+ * then make the check up front and then exit.
+ */
+ if ((filp->f_flags & O_NONBLOCK) ||
+ (tty->flags & (1 << TTY_IO_ERROR))) {
+ info->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+ }
+
+ if (tty->termios->c_cflag & CLOCAL)
+ do_clocal = 1;
+
+ /*
+ * Block waiting for the carrier detect and the line to become
+ * free (i.e., not in use by the callout). While we are in
+ * this loop, state->count is dropped by one, so that
+ * rs_close() knows when to free things. We restore it upon
+ * exit, either normal or abnormal.
+ */
+ retval = 0;
+ add_wait_queue(&info->open_wait, &wait);
+#ifdef SERIAL_DEBUG_OPEN
+ printk("block_til_ready before block: ttys%d, count = %d\n",
+ state->line, state->count);
+#endif
+ local_irq_save(flags);
+ if (!tty_hung_up_p(filp)) {
+ extra_count = 1;
+ state->count--;
+ }
+ local_irq_restore(flags);
+ info->blocked_open++;
+ while (1) {
+ local_irq_save(flags);
+ if (tty->termios->c_cflag & CBAUD)
+ rtsdtr_ctrl(SER_DTR|SER_RTS);
+ local_irq_restore(flags);
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (tty_hung_up_p(filp) ||
+ !(info->flags & ASYNC_INITIALIZED)) {
+#ifdef SERIAL_DO_RESTART
+ if (info->flags & ASYNC_HUP_NOTIFY)
+ retval = -EAGAIN;
+ else
+ retval = -ERESTARTSYS;
+#else
+ retval = -EAGAIN;
+#endif
+ break;
+ }
+ if (!(info->flags & ASYNC_CLOSING) &&
+ (do_clocal || (!(ciab.pra & SER_DCD)) ))
+ break;
+ if (signal_pending(current)) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+#ifdef SERIAL_DEBUG_OPEN
+ printk("block_til_ready blocking: ttys%d, count = %d\n",
+ info->line, state->count);
+#endif
+ tty_unlock();
+ schedule();
+ tty_lock();
+ }
+ __set_current_state(TASK_RUNNING);
+ remove_wait_queue(&info->open_wait, &wait);
+ if (extra_count)
+ state->count++;
+ info->blocked_open--;
+#ifdef SERIAL_DEBUG_OPEN
+ printk("block_til_ready after blocking: ttys%d, count = %d\n",
+ info->line, state->count);
+#endif
+ if (retval)
+ return retval;
+ info->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+}
+
+static int get_async_struct(int line, struct async_struct **ret_info)
+{
+ struct async_struct *info;
+ struct serial_state *sstate;
+
+ sstate = rs_table + line;
+ sstate->count++;
+ if (sstate->info) {
+ *ret_info = sstate->info;
+ return 0;
+ }
+ info = kzalloc(sizeof(struct async_struct), GFP_KERNEL);
+ if (!info) {
+ sstate->count--;
+ return -ENOMEM;
+ }
+#ifdef DECLARE_WAITQUEUE
+ init_waitqueue_head(&info->open_wait);
+ init_waitqueue_head(&info->close_wait);
+ init_waitqueue_head(&info->delta_msr_wait);
+#endif
+ info->magic = SERIAL_MAGIC;
+ info->port = sstate->port;
+ info->flags = sstate->flags;
+ info->xmit_fifo_size = sstate->xmit_fifo_size;
+ info->line = line;
+ tasklet_init(&info->tlet, do_softint, (unsigned long)info);
+ info->state = sstate;
+ if (sstate->info) {
+ kfree(info);
+ *ret_info = sstate->info;
+ return 0;
+ }
+ *ret_info = sstate->info = info;
+ return 0;
+}
+
+/*
+ * This routine is called whenever a serial port is opened. It
+ * enables interrupts for a serial port, linking in its async structure into
+ * the IRQ chain. It also performs the serial-specific
+ * initialization for the tty structure.
+ */
+static int rs_open(struct tty_struct *tty, struct file * filp)
+{
+ struct async_struct *info;
+ int retval, line;
+
+ line = tty->index;
+ if ((line < 0) || (line >= NR_PORTS)) {
+ return -ENODEV;
+ }
+ retval = get_async_struct(line, &info);
+ if (retval) {
+ return retval;
+ }
+ tty->driver_data = info;
+ info->tty = tty;
+ if (serial_paranoia_check(info, tty->name, "rs_open"))
+ return -ENODEV;
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("rs_open %s, count = %d\n", tty->name, info->state->count);
+#endif
+ info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+
+ /*
+ * If the port is the middle of closing, bail out now
+ */
+ if (tty_hung_up_p(filp) ||
+ (info->flags & ASYNC_CLOSING)) {
+ if (info->flags & ASYNC_CLOSING)
+ interruptible_sleep_on(&info->close_wait);
+#ifdef SERIAL_DO_RESTART
+ return ((info->flags & ASYNC_HUP_NOTIFY) ?
+ -EAGAIN : -ERESTARTSYS);
+#else
+ return -EAGAIN;
+#endif
+ }
+
+ /*
+ * Start up serial port
+ */
+ retval = startup(info);
+ if (retval) {
+ return retval;
+ }
+
+ retval = block_til_ready(tty, filp, info);
+ if (retval) {
+#ifdef SERIAL_DEBUG_OPEN
+ printk("rs_open returning after block_til_ready with %d\n",
+ retval);
+#endif
+ return retval;
+ }
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("rs_open %s successful...", tty->name);
+#endif
+ return 0;
+}
+
+/*
+ * /proc fs routines....
+ */
+
+static inline void line_info(struct seq_file *m, struct serial_state *state)
+{
+ struct async_struct *info = state->info, scr_info;
+ char stat_buf[30], control, status;
+ unsigned long flags;
+
+ seq_printf(m, "%d: uart:amiga_builtin",state->line);
+
+ /*
+ * Figure out the current RS-232 lines
+ */
+ if (!info) {
+ info = &scr_info; /* This is just for serial_{in,out} */
+
+ info->magic = SERIAL_MAGIC;
+ info->flags = state->flags;
+ info->quot = 0;
+ info->tty = NULL;
+ }
+ local_irq_save(flags);
+ status = ciab.pra;
+ control = info ? info->MCR : status;
+ local_irq_restore(flags);
+
+ stat_buf[0] = 0;
+ stat_buf[1] = 0;
+ if(!(control & SER_RTS))
+ strcat(stat_buf, "|RTS");
+ if(!(status & SER_CTS))
+ strcat(stat_buf, "|CTS");
+ if(!(control & SER_DTR))
+ strcat(stat_buf, "|DTR");
+ if(!(status & SER_DSR))
+ strcat(stat_buf, "|DSR");
+ if(!(status & SER_DCD))
+ strcat(stat_buf, "|CD");
+
+ if (info->quot) {
+ seq_printf(m, " baud:%d", state->baud_base / info->quot);
+ }
+
+ seq_printf(m, " tx:%d rx:%d", state->icount.tx, state->icount.rx);
+
+ if (state->icount.frame)
+ seq_printf(m, " fe:%d", state->icount.frame);
+
+ if (state->icount.parity)
+ seq_printf(m, " pe:%d", state->icount.parity);
+
+ if (state->icount.brk)
+ seq_printf(m, " brk:%d", state->icount.brk);
+
+ if (state->icount.overrun)
+ seq_printf(m, " oe:%d", state->icount.overrun);
+
+ /*
+ * Last thing is the RS-232 status lines
+ */
+ seq_printf(m, " %s\n", stat_buf+1);
+}
+
+static int rs_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "serinfo:1.0 driver:%s\n", serial_version);
+ line_info(m, &rs_table[0]);
+ return 0;
+}
+
+static int rs_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, rs_proc_show, NULL);
+}
+
+static const struct file_operations rs_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = rs_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/*
+ * ---------------------------------------------------------------------
+ * rs_init() and friends
+ *
+ * rs_init() is called at boot-time to initialize the serial driver.
+ * ---------------------------------------------------------------------
+ */
+
+/*
+ * This routine prints out the appropriate serial driver version
+ * number, and identifies which options were configured into this
+ * driver.
+ */
+static void show_serial_version(void)
+{
+ printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
+}
+
+
+static const struct tty_operations serial_ops = {
+ .open = rs_open,
+ .close = rs_close,
+ .write = rs_write,
+ .put_char = rs_put_char,
+ .flush_chars = rs_flush_chars,
+ .write_room = rs_write_room,
+ .chars_in_buffer = rs_chars_in_buffer,
+ .flush_buffer = rs_flush_buffer,
+ .ioctl = rs_ioctl,
+ .throttle = rs_throttle,
+ .unthrottle = rs_unthrottle,
+ .set_termios = rs_set_termios,
+ .stop = rs_stop,
+ .start = rs_start,
+ .hangup = rs_hangup,
+ .break_ctl = rs_break,
+ .send_xchar = rs_send_xchar,
+ .wait_until_sent = rs_wait_until_sent,
+ .tiocmget = rs_tiocmget,
+ .tiocmset = rs_tiocmset,
+ .get_icount = rs_get_icount,
+ .proc_fops = &rs_proc_fops,
+};
+
+/*
+ * The serial driver boot-time initialization code!
+ */
+static int __init amiga_serial_probe(struct platform_device *pdev)
+{
+ unsigned long flags;
+ struct serial_state * state;
+ int error;
+
+ serial_driver = alloc_tty_driver(1);
+ if (!serial_driver)
+ return -ENOMEM;
+
+ IRQ_ports = NULL;
+
+ show_serial_version();
+
+ /* Initialize the tty_driver structure */
+
+ serial_driver->owner = THIS_MODULE;
+ serial_driver->driver_name = "amiserial";
+ serial_driver->name = "ttyS";
+ serial_driver->major = TTY_MAJOR;
+ serial_driver->minor_start = 64;
+ serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ serial_driver->subtype = SERIAL_TYPE_NORMAL;
+ serial_driver->init_termios = tty_std_termios;
+ serial_driver->init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ serial_driver->flags = TTY_DRIVER_REAL_RAW;
+ tty_set_operations(serial_driver, &serial_ops);
+
+ error = tty_register_driver(serial_driver);
+ if (error)
+ goto fail_put_tty_driver;
+
+ state = rs_table;
+ state->magic = SSTATE_MAGIC;
+ state->port = (int)&custom.serdatr; /* Just to give it a value */
+ state->line = 0;
+ state->custom_divisor = 0;
+ state->close_delay = 5*HZ/10;
+ state->closing_wait = 30*HZ;
+ state->icount.cts = state->icount.dsr =
+ state->icount.rng = state->icount.dcd = 0;
+ state->icount.rx = state->icount.tx = 0;
+ state->icount.frame = state->icount.parity = 0;
+ state->icount.overrun = state->icount.brk = 0;
+
+ printk(KERN_INFO "ttyS%d is the amiga builtin serial port\n",
+ state->line);
+
+ /* Hardware set up */
+
+ state->baud_base = amiga_colorclock;
+ state->xmit_fifo_size = 1;
+
+ /* set ISRs, and then disable the rx interrupts */
+ error = request_irq(IRQ_AMIGA_TBE, ser_tx_int, 0, "serial TX", state);
+ if (error)
+ goto fail_unregister;
+
+ error = request_irq(IRQ_AMIGA_RBF, ser_rx_int, IRQF_DISABLED,
+ "serial RX", state);
+ if (error)
+ goto fail_free_irq;
+
+ local_irq_save(flags);
+
+ /* turn off Rx and Tx interrupts */
+ custom.intena = IF_RBF | IF_TBE;
+ mb();
+
+ /* clear any pending interrupt */
+ custom.intreq = IF_RBF | IF_TBE;
+ mb();
+
+ local_irq_restore(flags);
+
+ /*
+ * set the appropriate directions for the modem control flags,
+ * and clear RTS and DTR
+ */
+ ciab.ddra |= (SER_DTR | SER_RTS); /* outputs */
+ ciab.ddra &= ~(SER_DCD | SER_CTS | SER_DSR); /* inputs */
+
+ platform_set_drvdata(pdev, state);
+
+ return 0;
+
+fail_free_irq:
+ free_irq(IRQ_AMIGA_TBE, state);
+fail_unregister:
+ tty_unregister_driver(serial_driver);
+fail_put_tty_driver:
+ put_tty_driver(serial_driver);
+ return error;
+}
+
+static int __exit amiga_serial_remove(struct platform_device *pdev)
+{
+ int error;
+ struct serial_state *state = platform_get_drvdata(pdev);
+ struct async_struct *info = state->info;
+
+ /* printk("Unloading %s: version %s\n", serial_name, serial_version); */
+ tasklet_kill(&info->tlet);
+ if ((error = tty_unregister_driver(serial_driver)))
+ printk("SERIAL: failed to unregister serial driver (%d)\n",
+ error);
+ put_tty_driver(serial_driver);
+
+ rs_table[0].info = NULL;
+ kfree(info);
+
+ free_irq(IRQ_AMIGA_TBE, rs_table);
+ free_irq(IRQ_AMIGA_RBF, rs_table);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return error;
+}
+
+static struct platform_driver amiga_serial_driver = {
+ .remove = __exit_p(amiga_serial_remove),
+ .driver = {
+ .name = "amiga-serial",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init amiga_serial_init(void)
+{
+ return platform_driver_probe(&amiga_serial_driver, amiga_serial_probe);
+}
+
+module_init(amiga_serial_init);
+
+static void __exit amiga_serial_exit(void)
+{
+ platform_driver_unregister(&amiga_serial_driver);
+}
+
+module_exit(amiga_serial_exit);
+
+
+#if defined(CONFIG_SERIAL_CONSOLE) && !defined(MODULE)
+
+/*
+ * ------------------------------------------------------------
+ * Serial console driver
+ * ------------------------------------------------------------
+ */
+
+static void amiga_serial_putc(char c)
+{
+ custom.serdat = (unsigned char)c | 0x100;
+ while (!(custom.serdatr & 0x2000))
+ barrier();
+}
+
+/*
+ * Print a string to the serial port trying not to disturb
+ * any possible real use of the port...
+ *
+ * The console must be locked when we get here.
+ */
+static void serial_console_write(struct console *co, const char *s,
+ unsigned count)
+{
+ unsigned short intena = custom.intenar;
+
+ custom.intena = IF_TBE;
+
+ while (count--) {
+ if (*s == '\n')
+ amiga_serial_putc('\r');
+ amiga_serial_putc(*s++);
+ }
+
+ custom.intena = IF_SETCLR | (intena & IF_TBE);
+}
+
+static struct tty_driver *serial_console_device(struct console *c, int *index)
+{
+ *index = 0;
+ return serial_driver;
+}
+
+static struct console sercons = {
+ .name = "ttyS",
+ .write = serial_console_write,
+ .device = serial_console_device,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+};
+
+/*
+ * Register console.
+ */
+static int __init amiserial_console_init(void)
+{
+ register_console(&sercons);
+ return 0;
+}
+console_initcall(amiserial_console_init);
+
+#endif /* CONFIG_SERIAL_CONSOLE && !MODULE */
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:amiga-serial");
--- /dev/null
+/*
+ * TTY over Blackfin JTAG Communication
+ *
+ * Copyright 2008-2009 Analog Devices Inc.
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#define DRV_NAME "bfin-jtag-comm"
+#define DEV_NAME "ttyBFJC"
+#define pr_fmt(fmt) DRV_NAME ": " fmt
+
+#include <linux/circ_buf.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <asm/atomic.h>
+
+#define pr_init(fmt, args...) ({ static const __initconst char __fmt[] = fmt; printk(__fmt, ## args); })
+
+/* See the Debug/Emulation chapter in the HRM */
+#define EMUDOF 0x00000001 /* EMUDAT_OUT full & valid */
+#define EMUDIF 0x00000002 /* EMUDAT_IN full & valid */
+#define EMUDOOVF 0x00000004 /* EMUDAT_OUT overflow */
+#define EMUDIOVF 0x00000008 /* EMUDAT_IN overflow */
+
+static inline uint32_t bfin_write_emudat(uint32_t emudat)
+{
+ __asm__ __volatile__("emudat = %0;" : : "d"(emudat));
+ return emudat;
+}
+
+static inline uint32_t bfin_read_emudat(void)
+{
+ uint32_t emudat;
+ __asm__ __volatile__("%0 = emudat;" : "=d"(emudat));
+ return emudat;
+}
+
+static inline uint32_t bfin_write_emudat_chars(char a, char b, char c, char d)
+{
+ return bfin_write_emudat((a << 0) | (b << 8) | (c << 16) | (d << 24));
+}
+
+#define CIRC_SIZE 2048 /* see comment in tty_io.c:do_tty_write() */
+#define CIRC_MASK (CIRC_SIZE - 1)
+#define circ_empty(circ) ((circ)->head == (circ)->tail)
+#define circ_free(circ) CIRC_SPACE((circ)->head, (circ)->tail, CIRC_SIZE)
+#define circ_cnt(circ) CIRC_CNT((circ)->head, (circ)->tail, CIRC_SIZE)
+#define circ_byte(circ, idx) ((circ)->buf[(idx) & CIRC_MASK])
+
+static struct tty_driver *bfin_jc_driver;
+static struct task_struct *bfin_jc_kthread;
+static struct tty_struct * volatile bfin_jc_tty;
+static unsigned long bfin_jc_count;
+static DEFINE_MUTEX(bfin_jc_tty_mutex);
+static volatile struct circ_buf bfin_jc_write_buf;
+
+static int
+bfin_jc_emudat_manager(void *arg)
+{
+ uint32_t inbound_len = 0, outbound_len = 0;
+
+ while (!kthread_should_stop()) {
+ /* no one left to give data to, so sleep */
+ if (bfin_jc_tty == NULL && circ_empty(&bfin_jc_write_buf)) {
+ pr_debug("waiting for readers\n");
+ __set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule();
+ __set_current_state(TASK_RUNNING);
+ }
+
+ /* no data available, so just chill */
+ if (!(bfin_read_DBGSTAT() & EMUDIF) && circ_empty(&bfin_jc_write_buf)) {
+ pr_debug("waiting for data (in_len = %i) (circ: %i %i)\n",
+ inbound_len, bfin_jc_write_buf.tail, bfin_jc_write_buf.head);
+ if (inbound_len)
+ schedule();
+ else
+ schedule_timeout_interruptible(HZ);
+ continue;
+ }
+
+ /* if incoming data is ready, eat it */
+ if (bfin_read_DBGSTAT() & EMUDIF) {
+ struct tty_struct *tty;
+ mutex_lock(&bfin_jc_tty_mutex);
+ tty = (struct tty_struct *)bfin_jc_tty;
+ if (tty != NULL) {
+ uint32_t emudat = bfin_read_emudat();
+ if (inbound_len == 0) {
+ pr_debug("incoming length: 0x%08x\n", emudat);
+ inbound_len = emudat;
+ } else {
+ size_t num_chars = (4 <= inbound_len ? 4 : inbound_len);
+ pr_debug(" incoming data: 0x%08x (pushing %zu)\n", emudat, num_chars);
+ inbound_len -= num_chars;
+ tty_insert_flip_string(tty, (unsigned char *)&emudat, num_chars);
+ tty_flip_buffer_push(tty);
+ }
+ }
+ mutex_unlock(&bfin_jc_tty_mutex);
+ }
+
+ /* if outgoing data is ready, post it */
+ if (!(bfin_read_DBGSTAT() & EMUDOF) && !circ_empty(&bfin_jc_write_buf)) {
+ if (outbound_len == 0) {
+ outbound_len = circ_cnt(&bfin_jc_write_buf);
+ bfin_write_emudat(outbound_len);
+ pr_debug("outgoing length: 0x%08x\n", outbound_len);
+ } else {
+ struct tty_struct *tty;
+ int tail = bfin_jc_write_buf.tail;
+ size_t ate = (4 <= outbound_len ? 4 : outbound_len);
+ uint32_t emudat =
+ bfin_write_emudat_chars(
+ circ_byte(&bfin_jc_write_buf, tail + 0),
+ circ_byte(&bfin_jc_write_buf, tail + 1),
+ circ_byte(&bfin_jc_write_buf, tail + 2),
+ circ_byte(&bfin_jc_write_buf, tail + 3)
+ );
+ bfin_jc_write_buf.tail += ate;
+ outbound_len -= ate;
+ mutex_lock(&bfin_jc_tty_mutex);
+ tty = (struct tty_struct *)bfin_jc_tty;
+ if (tty)
+ tty_wakeup(tty);
+ mutex_unlock(&bfin_jc_tty_mutex);
+ pr_debug(" outgoing data: 0x%08x (pushing %zu)\n", emudat, ate);
+ }
+ }
+ }
+
+ __set_current_state(TASK_RUNNING);
+ return 0;
+}
+
+static int
+bfin_jc_open(struct tty_struct *tty, struct file *filp)
+{
+ mutex_lock(&bfin_jc_tty_mutex);
+ pr_debug("open %lu\n", bfin_jc_count);
+ ++bfin_jc_count;
+ bfin_jc_tty = tty;
+ wake_up_process(bfin_jc_kthread);
+ mutex_unlock(&bfin_jc_tty_mutex);
+ return 0;
+}
+
+static void
+bfin_jc_close(struct tty_struct *tty, struct file *filp)
+{
+ mutex_lock(&bfin_jc_tty_mutex);
+ pr_debug("close %lu\n", bfin_jc_count);
+ if (--bfin_jc_count == 0)
+ bfin_jc_tty = NULL;
+ wake_up_process(bfin_jc_kthread);
+ mutex_unlock(&bfin_jc_tty_mutex);
+}
+
+/* XXX: we dont handle the put_char() case where we must handle count = 1 */
+static int
+bfin_jc_circ_write(const unsigned char *buf, int count)
+{
+ int i;
+ count = min(count, circ_free(&bfin_jc_write_buf));
+ pr_debug("going to write chunk of %i bytes\n", count);
+ for (i = 0; i < count; ++i)
+ circ_byte(&bfin_jc_write_buf, bfin_jc_write_buf.head + i) = buf[i];
+ bfin_jc_write_buf.head += i;
+ return i;
+}
+
+#ifndef CONFIG_BFIN_JTAG_COMM_CONSOLE
+# define console_lock()
+# define console_unlock()
+#endif
+static int
+bfin_jc_write(struct tty_struct *tty, const unsigned char *buf, int count)
+{
+ int i;
+ console_lock();
+ i = bfin_jc_circ_write(buf, count);
+ console_unlock();
+ wake_up_process(bfin_jc_kthread);
+ return i;
+}
+
+static void
+bfin_jc_flush_chars(struct tty_struct *tty)
+{
+ wake_up_process(bfin_jc_kthread);
+}
+
+static int
+bfin_jc_write_room(struct tty_struct *tty)
+{
+ return circ_free(&bfin_jc_write_buf);
+}
+
+static int
+bfin_jc_chars_in_buffer(struct tty_struct *tty)
+{
+ return circ_cnt(&bfin_jc_write_buf);
+}
+
+static void
+bfin_jc_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ unsigned long expire = jiffies + timeout;
+ while (!circ_empty(&bfin_jc_write_buf)) {
+ if (signal_pending(current))
+ break;
+ if (time_after(jiffies, expire))
+ break;
+ }
+}
+
+static const struct tty_operations bfin_jc_ops = {
+ .open = bfin_jc_open,
+ .close = bfin_jc_close,
+ .write = bfin_jc_write,
+ /*.put_char = bfin_jc_put_char,*/
+ .flush_chars = bfin_jc_flush_chars,
+ .write_room = bfin_jc_write_room,
+ .chars_in_buffer = bfin_jc_chars_in_buffer,
+ .wait_until_sent = bfin_jc_wait_until_sent,
+};
+
+static int __init bfin_jc_init(void)
+{
+ int ret;
+
+ bfin_jc_kthread = kthread_create(bfin_jc_emudat_manager, NULL, DRV_NAME);
+ if (IS_ERR(bfin_jc_kthread))
+ return PTR_ERR(bfin_jc_kthread);
+
+ ret = -ENOMEM;
+
+ bfin_jc_write_buf.head = bfin_jc_write_buf.tail = 0;
+ bfin_jc_write_buf.buf = kmalloc(CIRC_SIZE, GFP_KERNEL);
+ if (!bfin_jc_write_buf.buf)
+ goto err;
+
+ bfin_jc_driver = alloc_tty_driver(1);
+ if (!bfin_jc_driver)
+ goto err;
+
+ bfin_jc_driver->owner = THIS_MODULE;
+ bfin_jc_driver->driver_name = DRV_NAME;
+ bfin_jc_driver->name = DEV_NAME;
+ bfin_jc_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ bfin_jc_driver->subtype = SERIAL_TYPE_NORMAL;
+ bfin_jc_driver->init_termios = tty_std_termios;
+ tty_set_operations(bfin_jc_driver, &bfin_jc_ops);
+
+ ret = tty_register_driver(bfin_jc_driver);
+ if (ret)
+ goto err;
+
+ pr_init(KERN_INFO DRV_NAME ": initialized\n");
+
+ return 0;
+
+ err:
+ put_tty_driver(bfin_jc_driver);
+ kfree(bfin_jc_write_buf.buf);
+ kthread_stop(bfin_jc_kthread);
+ return ret;
+}
+module_init(bfin_jc_init);
+
+static void __exit bfin_jc_exit(void)
+{
+ kthread_stop(bfin_jc_kthread);
+ kfree(bfin_jc_write_buf.buf);
+ tty_unregister_driver(bfin_jc_driver);
+ put_tty_driver(bfin_jc_driver);
+}
+module_exit(bfin_jc_exit);
+
+#if defined(CONFIG_BFIN_JTAG_COMM_CONSOLE) || defined(CONFIG_EARLY_PRINTK)
+static void
+bfin_jc_straight_buffer_write(const char *buf, unsigned count)
+{
+ unsigned ate = 0;
+ while (bfin_read_DBGSTAT() & EMUDOF)
+ continue;
+ bfin_write_emudat(count);
+ while (ate < count) {
+ while (bfin_read_DBGSTAT() & EMUDOF)
+ continue;
+ bfin_write_emudat_chars(buf[ate], buf[ate+1], buf[ate+2], buf[ate+3]);
+ ate += 4;
+ }
+}
+#endif
+
+#ifdef CONFIG_BFIN_JTAG_COMM_CONSOLE
+static void
+bfin_jc_console_write(struct console *co, const char *buf, unsigned count)
+{
+ if (bfin_jc_kthread == NULL)
+ bfin_jc_straight_buffer_write(buf, count);
+ else
+ bfin_jc_circ_write(buf, count);
+}
+
+static struct tty_driver *
+bfin_jc_console_device(struct console *co, int *index)
+{
+ *index = co->index;
+ return bfin_jc_driver;
+}
+
+static struct console bfin_jc_console = {
+ .name = DEV_NAME,
+ .write = bfin_jc_console_write,
+ .device = bfin_jc_console_device,
+ .flags = CON_ANYTIME | CON_PRINTBUFFER,
+ .index = -1,
+};
+
+static int __init bfin_jc_console_init(void)
+{
+ register_console(&bfin_jc_console);
+ return 0;
+}
+console_initcall(bfin_jc_console_init);
+#endif
+
+#ifdef CONFIG_EARLY_PRINTK
+static void __init
+bfin_jc_early_write(struct console *co, const char *buf, unsigned int count)
+{
+ bfin_jc_straight_buffer_write(buf, count);
+}
+
+static struct __initdata console bfin_jc_early_console = {
+ .name = "early_BFJC",
+ .write = bfin_jc_early_write,
+ .flags = CON_ANYTIME | CON_PRINTBUFFER,
+ .index = -1,
+};
+
+struct console * __init
+bfin_jc_early_init(unsigned int port, unsigned int cflag)
+{
+ return &bfin_jc_early_console;
+}
+#endif
+
+MODULE_AUTHOR("Mike Frysinger <vapier@gentoo.org>");
+MODULE_DESCRIPTION("TTY over Blackfin JTAG Communication");
+MODULE_LICENSE("GPL");
--- /dev/null
+#undef BLOCKMOVE
+#define Z_WAKE
+#undef Z_EXT_CHARS_IN_BUFFER
+
+/*
+ * linux/drivers/char/cyclades.c
+ *
+ * This file contains the driver for the Cyclades async multiport
+ * serial boards.
+ *
+ * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
+ * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
+ *
+ * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
+ *
+ * Much of the design and some of the code came from serial.c
+ * which was copyright (C) 1991, 1992 Linus Torvalds. It was
+ * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
+ * and then fixed as suggested by Michael K. Johnson 12/12/92.
+ * Converted to pci probing and cleaned up by Jiri Slaby.
+ *
+ */
+
+#define CY_VERSION "2.6"
+
+/* If you need to install more boards than NR_CARDS, change the constant
+ in the definition below. No other change is necessary to support up to
+ eight boards. Beyond that you'll have to extend cy_isa_addresses. */
+
+#define NR_CARDS 4
+
+/*
+ If the total number of ports is larger than NR_PORTS, change this
+ constant in the definition below. No other change is necessary to
+ support more boards/ports. */
+
+#define NR_PORTS 256
+
+#define ZO_V1 0
+#define ZO_V2 1
+#define ZE_V1 2
+
+#define SERIAL_PARANOIA_CHECK
+#undef CY_DEBUG_OPEN
+#undef CY_DEBUG_THROTTLE
+#undef CY_DEBUG_OTHER
+#undef CY_DEBUG_IO
+#undef CY_DEBUG_COUNT
+#undef CY_DEBUG_DTR
+#undef CY_DEBUG_WAIT_UNTIL_SENT
+#undef CY_DEBUG_INTERRUPTS
+#undef CY_16Y_HACK
+#undef CY_ENABLE_MONITORING
+#undef CY_PCI_DEBUG
+
+/*
+ * Include section
+ */
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/cyclades.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/bitops.h>
+#include <linux/firmware.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+
+#include <linux/io.h>
+#include <linux/uaccess.h>
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+
+#include <linux/stat.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+static void cy_send_xchar(struct tty_struct *tty, char ch);
+
+#ifndef SERIAL_XMIT_SIZE
+#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
+#endif
+
+#define STD_COM_FLAGS (0)
+
+/* firmware stuff */
+#define ZL_MAX_BLOCKS 16
+#define DRIVER_VERSION 0x02010203
+#define RAM_SIZE 0x80000
+
+enum zblock_type {
+ ZBLOCK_PRG = 0,
+ ZBLOCK_FPGA = 1
+};
+
+struct zfile_header {
+ char name[64];
+ char date[32];
+ char aux[32];
+ u32 n_config;
+ u32 config_offset;
+ u32 n_blocks;
+ u32 block_offset;
+ u32 reserved[9];
+} __attribute__ ((packed));
+
+struct zfile_config {
+ char name[64];
+ u32 mailbox;
+ u32 function;
+ u32 n_blocks;
+ u32 block_list[ZL_MAX_BLOCKS];
+} __attribute__ ((packed));
+
+struct zfile_block {
+ u32 type;
+ u32 file_offset;
+ u32 ram_offset;
+ u32 size;
+} __attribute__ ((packed));
+
+static struct tty_driver *cy_serial_driver;
+
+#ifdef CONFIG_ISA
+/* This is the address lookup table. The driver will probe for
+ Cyclom-Y/ISA boards at all addresses in here. If you want the
+ driver to probe addresses at a different address, add it to
+ this table. If the driver is probing some other board and
+ causing problems, remove the offending address from this table.
+*/
+
+static unsigned int cy_isa_addresses[] = {
+ 0xD0000,
+ 0xD2000,
+ 0xD4000,
+ 0xD6000,
+ 0xD8000,
+ 0xDA000,
+ 0xDC000,
+ 0xDE000,
+ 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
+
+static long maddr[NR_CARDS];
+static int irq[NR_CARDS];
+
+module_param_array(maddr, long, NULL, 0);
+module_param_array(irq, int, NULL, 0);
+
+#endif /* CONFIG_ISA */
+
+/* This is the per-card data structure containing address, irq, number of
+ channels, etc. This driver supports a maximum of NR_CARDS cards.
+*/
+static struct cyclades_card cy_card[NR_CARDS];
+
+static int cy_next_channel; /* next minor available */
+
+/*
+ * This is used to look up the divisor speeds and the timeouts
+ * We're normally limited to 15 distinct baud rates. The extra
+ * are accessed via settings in info->port.flags.
+ * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
+ * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
+ * HI VHI
+ * 20
+ */
+static const int baud_table[] = {
+ 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
+ 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
+ 230400, 0
+};
+
+static const char baud_co_25[] = { /* 25 MHz clock option table */
+ /* value => 00 01 02 03 04 */
+ /* divide by 8 32 128 512 2048 */
+ 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
+ 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */
+ 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
+ 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
+};
+
+static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
+ /* value => 00 01 02 03 04 */
+ /* divide by 8 32 128 512 2048 */
+ 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
+ 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00
+};
+
+static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
+ 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
+ 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
+ 0x21
+};
+
+static const char baud_cor3[] = { /* receive threshold */
+ 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
+ 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
+ 0x07
+};
+
+/*
+ * The Cyclades driver implements HW flow control as any serial driver.
+ * The cyclades_port structure member rflow and the vector rflow_thr
+ * allows us to take advantage of a special feature in the CD1400 to avoid
+ * data loss even when the system interrupt latency is too high. These flags
+ * are to be used only with very special applications. Setting these flags
+ * requires the use of a special cable (DTR and RTS reversed). In the new
+ * CD1400-based boards (rev. 6.00 or later), there is no need for special
+ * cables.
+ */
+
+static const char rflow_thr[] = { /* rflow threshold */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
+ 0x0a
+};
+
+/* The Cyclom-Ye has placed the sequential chips in non-sequential
+ * address order. This look-up table overcomes that problem.
+ */
+static const unsigned int cy_chip_offset[] = { 0x0000,
+ 0x0400,
+ 0x0800,
+ 0x0C00,
+ 0x0200,
+ 0x0600,
+ 0x0A00,
+ 0x0E00
+};
+
+/* PCI related definitions */
+
+#ifdef CONFIG_PCI
+static const struct pci_device_id cy_pci_dev_id[] = {
+ /* PCI < 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
+ /* PCI > 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
+ /* 4Y PCI < 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
+ /* 4Y PCI > 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
+ /* 8Y PCI < 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
+ /* 8Y PCI > 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
+ /* Z PCI < 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
+ /* Z PCI > 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
+ { } /* end of table */
+};
+MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
+#endif
+
+static void cy_start(struct tty_struct *);
+static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
+static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
+#ifdef CONFIG_ISA
+static unsigned detect_isa_irq(void __iomem *);
+#endif /* CONFIG_ISA */
+
+#ifndef CONFIG_CYZ_INTR
+static void cyz_poll(unsigned long);
+
+/* The Cyclades-Z polling cycle is defined by this variable */
+static long cyz_polling_cycle = CZ_DEF_POLL;
+
+static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
+
+#else /* CONFIG_CYZ_INTR */
+static void cyz_rx_restart(unsigned long);
+static struct timer_list cyz_rx_full_timer[NR_PORTS];
+#endif /* CONFIG_CYZ_INTR */
+
+static inline void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
+{
+ struct cyclades_card *card = port->card;
+
+ cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val);
+}
+
+static inline u8 cyy_readb(struct cyclades_port *port, u32 reg)
+{
+ struct cyclades_card *card = port->card;
+
+ return readb(port->u.cyy.base_addr + (reg << card->bus_index));
+}
+
+static inline bool cy_is_Z(struct cyclades_card *card)
+{
+ return card->num_chips == (unsigned int)-1;
+}
+
+static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
+{
+ return readl(&ctl_addr->init_ctrl) & (1 << 17);
+}
+
+static inline bool cyz_fpga_loaded(struct cyclades_card *card)
+{
+ return __cyz_fpga_loaded(card->ctl_addr.p9060);
+}
+
+static inline bool cyz_is_loaded(struct cyclades_card *card)
+{
+ struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
+
+ return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
+ readl(&fw_id->signature) == ZFIRM_ID;
+}
+
+static inline int serial_paranoia_check(struct cyclades_port *info,
+ const char *name, const char *routine)
+{
+#ifdef SERIAL_PARANOIA_CHECK
+ if (!info) {
+ printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
+ "in %s\n", name, routine);
+ return 1;
+ }
+
+ if (info->magic != CYCLADES_MAGIC) {
+ printk(KERN_WARNING "cyc Warning: bad magic number for serial "
+ "struct (%s) in %s\n", name, routine);
+ return 1;
+ }
+#endif
+ return 0;
+}
+
+/***********************************************************/
+/********* Start of block of Cyclom-Y specific code ********/
+
+/* This routine waits up to 1000 micro-seconds for the previous
+ command to the Cirrus chip to complete and then issues the
+ new command. An error is returned if the previous command
+ didn't finish within the time limit.
+
+ This function is only called from inside spinlock-protected code.
+ */
+static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index)
+{
+ void __iomem *ccr = base_addr + (CyCCR << index);
+ unsigned int i;
+
+ /* Check to see that the previous command has completed */
+ for (i = 0; i < 100; i++) {
+ if (readb(ccr) == 0)
+ break;
+ udelay(10L);
+ }
+ /* if the CCR never cleared, the previous command
+ didn't finish within the "reasonable time" */
+ if (i == 100)
+ return -1;
+
+ /* Issue the new command */
+ cy_writeb(ccr, cmd);
+
+ return 0;
+}
+
+static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd)
+{
+ return __cyy_issue_cmd(port->u.cyy.base_addr, cmd,
+ port->card->bus_index);
+}
+
+#ifdef CONFIG_ISA
+/* ISA interrupt detection code */
+static unsigned detect_isa_irq(void __iomem *address)
+{
+ int irq;
+ unsigned long irqs, flags;
+ int save_xir, save_car;
+ int index = 0; /* IRQ probing is only for ISA */
+
+ /* forget possible initially masked and pending IRQ */
+ irq = probe_irq_off(probe_irq_on());
+
+ /* Clear interrupts on the board first */
+ cy_writeb(address + (Cy_ClrIntr << index), 0);
+ /* Cy_ClrIntr is 0x1800 */
+
+ irqs = probe_irq_on();
+ /* Wait ... */
+ msleep(5);
+
+ /* Enable the Tx interrupts on the CD1400 */
+ local_irq_save(flags);
+ cy_writeb(address + (CyCAR << index), 0);
+ __cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
+
+ cy_writeb(address + (CyCAR << index), 0);
+ cy_writeb(address + (CySRER << index),
+ readb(address + (CySRER << index)) | CyTxRdy);
+ local_irq_restore(flags);
+
+ /* Wait ... */
+ msleep(5);
+
+ /* Check which interrupt is in use */
+ irq = probe_irq_off(irqs);
+
+ /* Clean up */
+ save_xir = (u_char) readb(address + (CyTIR << index));
+ save_car = readb(address + (CyCAR << index));
+ cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
+ cy_writeb(address + (CySRER << index),
+ readb(address + (CySRER << index)) & ~CyTxRdy);
+ cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
+ cy_writeb(address + (CyCAR << index), (save_car));
+ cy_writeb(address + (Cy_ClrIntr << index), 0);
+ /* Cy_ClrIntr is 0x1800 */
+
+ return (irq > 0) ? irq : 0;
+}
+#endif /* CONFIG_ISA */
+
+static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
+ void __iomem *base_addr)
+{
+ struct cyclades_port *info;
+ struct tty_struct *tty;
+ int len, index = cinfo->bus_index;
+ u8 ivr, save_xir, channel, save_car, data, char_count;
+
+#ifdef CY_DEBUG_INTERRUPTS
+ printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
+#endif
+ /* determine the channel & change to that context */
+ save_xir = readb(base_addr + (CyRIR << index));
+ channel = save_xir & CyIRChannel;
+ info = &cinfo->ports[channel + chip * 4];
+ save_car = cyy_readb(info, CyCAR);
+ cyy_writeb(info, CyCAR, save_xir);
+ ivr = cyy_readb(info, CyRIVR) & CyIVRMask;
+
+ tty = tty_port_tty_get(&info->port);
+ /* if there is nowhere to put the data, discard it */
+ if (tty == NULL) {
+ if (ivr == CyIVRRxEx) { /* exception */
+ data = cyy_readb(info, CyRDSR);
+ } else { /* normal character reception */
+ char_count = cyy_readb(info, CyRDCR);
+ while (char_count--)
+ data = cyy_readb(info, CyRDSR);
+ }
+ goto end;
+ }
+ /* there is an open port for this data */
+ if (ivr == CyIVRRxEx) { /* exception */
+ data = cyy_readb(info, CyRDSR);
+
+ /* For statistics only */
+ if (data & CyBREAK)
+ info->icount.brk++;
+ else if (data & CyFRAME)
+ info->icount.frame++;
+ else if (data & CyPARITY)
+ info->icount.parity++;
+ else if (data & CyOVERRUN)
+ info->icount.overrun++;
+
+ if (data & info->ignore_status_mask) {
+ info->icount.rx++;
+ tty_kref_put(tty);
+ return;
+ }
+ if (tty_buffer_request_room(tty, 1)) {
+ if (data & info->read_status_mask) {
+ if (data & CyBREAK) {
+ tty_insert_flip_char(tty,
+ cyy_readb(info, CyRDSR),
+ TTY_BREAK);
+ info->icount.rx++;
+ if (info->port.flags & ASYNC_SAK)
+ do_SAK(tty);
+ } else if (data & CyFRAME) {
+ tty_insert_flip_char(tty,
+ cyy_readb(info, CyRDSR),
+ TTY_FRAME);
+ info->icount.rx++;
+ info->idle_stats.frame_errs++;
+ } else if (data & CyPARITY) {
+ /* Pieces of seven... */
+ tty_insert_flip_char(tty,
+ cyy_readb(info, CyRDSR),
+ TTY_PARITY);
+ info->icount.rx++;
+ info->idle_stats.parity_errs++;
+ } else if (data & CyOVERRUN) {
+ tty_insert_flip_char(tty, 0,
+ TTY_OVERRUN);
+ info->icount.rx++;
+ /* If the flip buffer itself is
+ overflowing, we still lose
+ the next incoming character.
+ */
+ tty_insert_flip_char(tty,
+ cyy_readb(info, CyRDSR),
+ TTY_FRAME);
+ info->icount.rx++;
+ info->idle_stats.overruns++;
+ /* These two conditions may imply */
+ /* a normal read should be done. */
+ /* } else if(data & CyTIMEOUT) { */
+ /* } else if(data & CySPECHAR) { */
+ } else {
+ tty_insert_flip_char(tty, 0,
+ TTY_NORMAL);
+ info->icount.rx++;
+ }
+ } else {
+ tty_insert_flip_char(tty, 0, TTY_NORMAL);
+ info->icount.rx++;
+ }
+ } else {
+ /* there was a software buffer overrun and nothing
+ * could be done about it!!! */
+ info->icount.buf_overrun++;
+ info->idle_stats.overruns++;
+ }
+ } else { /* normal character reception */
+ /* load # chars available from the chip */
+ char_count = cyy_readb(info, CyRDCR);
+
+#ifdef CY_ENABLE_MONITORING
+ ++info->mon.int_count;
+ info->mon.char_count += char_count;
+ if (char_count > info->mon.char_max)
+ info->mon.char_max = char_count;
+ info->mon.char_last = char_count;
+#endif
+ len = tty_buffer_request_room(tty, char_count);
+ while (len--) {
+ data = cyy_readb(info, CyRDSR);
+ tty_insert_flip_char(tty, data, TTY_NORMAL);
+ info->idle_stats.recv_bytes++;
+ info->icount.rx++;
+#ifdef CY_16Y_HACK
+ udelay(10L);
+#endif
+ }
+ info->idle_stats.recv_idle = jiffies;
+ }
+ tty_schedule_flip(tty);
+ tty_kref_put(tty);
+end:
+ /* end of service */
+ cyy_writeb(info, CyRIR, save_xir & 0x3f);
+ cyy_writeb(info, CyCAR, save_car);
+}
+
+static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
+ void __iomem *base_addr)
+{
+ struct cyclades_port *info;
+ struct tty_struct *tty;
+ int char_count, index = cinfo->bus_index;
+ u8 save_xir, channel, save_car, outch;
+
+ /* Since we only get here when the transmit buffer
+ is empty, we know we can always stuff a dozen
+ characters. */
+#ifdef CY_DEBUG_INTERRUPTS
+ printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
+#endif
+
+ /* determine the channel & change to that context */
+ save_xir = readb(base_addr + (CyTIR << index));
+ channel = save_xir & CyIRChannel;
+ save_car = readb(base_addr + (CyCAR << index));
+ cy_writeb(base_addr + (CyCAR << index), save_xir);
+
+ info = &cinfo->ports[channel + chip * 4];
+ tty = tty_port_tty_get(&info->port);
+ if (tty == NULL) {
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
+ goto end;
+ }
+
+ /* load the on-chip space for outbound data */
+ char_count = info->xmit_fifo_size;
+
+ if (info->x_char) { /* send special char */
+ outch = info->x_char;
+ cyy_writeb(info, CyTDR, outch);
+ char_count--;
+ info->icount.tx++;
+ info->x_char = 0;
+ }
+
+ if (info->breakon || info->breakoff) {
+ if (info->breakon) {
+ cyy_writeb(info, CyTDR, 0);
+ cyy_writeb(info, CyTDR, 0x81);
+ info->breakon = 0;
+ char_count -= 2;
+ }
+ if (info->breakoff) {
+ cyy_writeb(info, CyTDR, 0);
+ cyy_writeb(info, CyTDR, 0x83);
+ info->breakoff = 0;
+ char_count -= 2;
+ }
+ }
+
+ while (char_count-- > 0) {
+ if (!info->xmit_cnt) {
+ if (cyy_readb(info, CySRER) & CyTxMpty) {
+ cyy_writeb(info, CySRER,
+ cyy_readb(info, CySRER) & ~CyTxMpty);
+ } else {
+ cyy_writeb(info, CySRER, CyTxMpty |
+ (cyy_readb(info, CySRER) & ~CyTxRdy));
+ }
+ goto done;
+ }
+ if (info->port.xmit_buf == NULL) {
+ cyy_writeb(info, CySRER,
+ cyy_readb(info, CySRER) & ~CyTxRdy);
+ goto done;
+ }
+ if (tty->stopped || tty->hw_stopped) {
+ cyy_writeb(info, CySRER,
+ cyy_readb(info, CySRER) & ~CyTxRdy);
+ goto done;
+ }
+ /* Because the Embedded Transmit Commands have been enabled,
+ * we must check to see if the escape character, NULL, is being
+ * sent. If it is, we must ensure that there is room for it to
+ * be doubled in the output stream. Therefore we no longer
+ * advance the pointer when the character is fetched, but
+ * rather wait until after the check for a NULL output
+ * character. This is necessary because there may not be room
+ * for the two chars needed to send a NULL.)
+ */
+ outch = info->port.xmit_buf[info->xmit_tail];
+ if (outch) {
+ info->xmit_cnt--;
+ info->xmit_tail = (info->xmit_tail + 1) &
+ (SERIAL_XMIT_SIZE - 1);
+ cyy_writeb(info, CyTDR, outch);
+ info->icount.tx++;
+ } else {
+ if (char_count > 1) {
+ info->xmit_cnt--;
+ info->xmit_tail = (info->xmit_tail + 1) &
+ (SERIAL_XMIT_SIZE - 1);
+ cyy_writeb(info, CyTDR, outch);
+ cyy_writeb(info, CyTDR, 0);
+ info->icount.tx++;
+ char_count--;
+ }
+ }
+ }
+
+done:
+ tty_wakeup(tty);
+ tty_kref_put(tty);
+end:
+ /* end of service */
+ cyy_writeb(info, CyTIR, save_xir & 0x3f);
+ cyy_writeb(info, CyCAR, save_car);
+}
+
+static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
+ void __iomem *base_addr)
+{
+ struct cyclades_port *info;
+ struct tty_struct *tty;
+ int index = cinfo->bus_index;
+ u8 save_xir, channel, save_car, mdm_change, mdm_status;
+
+ /* determine the channel & change to that context */
+ save_xir = readb(base_addr + (CyMIR << index));
+ channel = save_xir & CyIRChannel;
+ info = &cinfo->ports[channel + chip * 4];
+ save_car = cyy_readb(info, CyCAR);
+ cyy_writeb(info, CyCAR, save_xir);
+
+ mdm_change = cyy_readb(info, CyMISR);
+ mdm_status = cyy_readb(info, CyMSVR1);
+
+ tty = tty_port_tty_get(&info->port);
+ if (!tty)
+ goto end;
+
+ if (mdm_change & CyANY_DELTA) {
+ /* For statistics only */
+ if (mdm_change & CyDCD)
+ info->icount.dcd++;
+ if (mdm_change & CyCTS)
+ info->icount.cts++;
+ if (mdm_change & CyDSR)
+ info->icount.dsr++;
+ if (mdm_change & CyRI)
+ info->icount.rng++;
+
+ wake_up_interruptible(&info->port.delta_msr_wait);
+ }
+
+ if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
+ if (mdm_status & CyDCD)
+ wake_up_interruptible(&info->port.open_wait);
+ else
+ tty_hangup(tty);
+ }
+ if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
+ if (tty->hw_stopped) {
+ if (mdm_status & CyCTS) {
+ /* cy_start isn't used
+ because... !!! */
+ tty->hw_stopped = 0;
+ cyy_writeb(info, CySRER,
+ cyy_readb(info, CySRER) | CyTxRdy);
+ tty_wakeup(tty);
+ }
+ } else {
+ if (!(mdm_status & CyCTS)) {
+ /* cy_stop isn't used
+ because ... !!! */
+ tty->hw_stopped = 1;
+ cyy_writeb(info, CySRER,
+ cyy_readb(info, CySRER) & ~CyTxRdy);
+ }
+ }
+ }
+/* if (mdm_change & CyDSR) {
+ }
+ if (mdm_change & CyRI) {
+ }*/
+ tty_kref_put(tty);
+end:
+ /* end of service */
+ cyy_writeb(info, CyMIR, save_xir & 0x3f);
+ cyy_writeb(info, CyCAR, save_car);
+}
+
+/* The real interrupt service routine is called
+ whenever the card wants its hand held--chars
+ received, out buffer empty, modem change, etc.
+ */
+static irqreturn_t cyy_interrupt(int irq, void *dev_id)
+{
+ int status;
+ struct cyclades_card *cinfo = dev_id;
+ void __iomem *base_addr, *card_base_addr;
+ unsigned int chip, too_many, had_work;
+ int index;
+
+ if (unlikely(cinfo == NULL)) {
+#ifdef CY_DEBUG_INTERRUPTS
+ printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
+ irq);
+#endif
+ return IRQ_NONE; /* spurious interrupt */
+ }
+
+ card_base_addr = cinfo->base_addr;
+ index = cinfo->bus_index;
+
+ /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
+ if (unlikely(card_base_addr == NULL))
+ return IRQ_HANDLED;
+
+ /* This loop checks all chips in the card. Make a note whenever
+ _any_ chip had some work to do, as this is considered an
+ indication that there will be more to do. Only when no chip
+ has any work does this outermost loop exit.
+ */
+ do {
+ had_work = 0;
+ for (chip = 0; chip < cinfo->num_chips; chip++) {
+ base_addr = cinfo->base_addr +
+ (cy_chip_offset[chip] << index);
+ too_many = 0;
+ while ((status = readb(base_addr +
+ (CySVRR << index))) != 0x00) {
+ had_work++;
+ /* The purpose of the following test is to ensure that
+ no chip can monopolize the driver. This forces the
+ chips to be checked in a round-robin fashion (after
+ draining each of a bunch (1000) of characters).
+ */
+ if (1000 < too_many++)
+ break;
+ spin_lock(&cinfo->card_lock);
+ if (status & CySRReceive) /* rx intr */
+ cyy_chip_rx(cinfo, chip, base_addr);
+ if (status & CySRTransmit) /* tx intr */
+ cyy_chip_tx(cinfo, chip, base_addr);
+ if (status & CySRModem) /* modem intr */
+ cyy_chip_modem(cinfo, chip, base_addr);
+ spin_unlock(&cinfo->card_lock);
+ }
+ }
+ } while (had_work);
+
+ /* clear interrupts */
+ spin_lock(&cinfo->card_lock);
+ cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
+ /* Cy_ClrIntr is 0x1800 */
+ spin_unlock(&cinfo->card_lock);
+ return IRQ_HANDLED;
+} /* cyy_interrupt */
+
+static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
+ unsigned int clear)
+{
+ struct cyclades_card *card = info->card;
+ int channel = info->line - card->first_line;
+ u32 rts, dtr, msvrr, msvrd;
+
+ channel &= 0x03;
+
+ if (info->rtsdtr_inv) {
+ msvrr = CyMSVR2;
+ msvrd = CyMSVR1;
+ rts = CyDTR;
+ dtr = CyRTS;
+ } else {
+ msvrr = CyMSVR1;
+ msvrd = CyMSVR2;
+ rts = CyRTS;
+ dtr = CyDTR;
+ }
+ if (set & TIOCM_RTS) {
+ cyy_writeb(info, CyCAR, channel);
+ cyy_writeb(info, msvrr, rts);
+ }
+ if (clear & TIOCM_RTS) {
+ cyy_writeb(info, CyCAR, channel);
+ cyy_writeb(info, msvrr, ~rts);
+ }
+ if (set & TIOCM_DTR) {
+ cyy_writeb(info, CyCAR, channel);
+ cyy_writeb(info, msvrd, dtr);
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
+ printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
+ cyy_readb(info, CyMSVR1),
+ cyy_readb(info, CyMSVR2));
+#endif
+ }
+ if (clear & TIOCM_DTR) {
+ cyy_writeb(info, CyCAR, channel);
+ cyy_writeb(info, msvrd, ~dtr);
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
+ printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
+ cyy_readb(info, CyMSVR1),
+ cyy_readb(info, CyMSVR2));
+#endif
+ }
+}
+
+/***********************************************************/
+/********* End of block of Cyclom-Y specific code **********/
+/******** Start of block of Cyclades-Z specific code *******/
+/***********************************************************/
+
+static int
+cyz_fetch_msg(struct cyclades_card *cinfo,
+ __u32 *channel, __u8 *cmd, __u32 *param)
+{
+ struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
+ unsigned long loc_doorbell;
+
+ loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
+ if (loc_doorbell) {
+ *cmd = (char)(0xff & loc_doorbell);
+ *channel = readl(&board_ctrl->fwcmd_channel);
+ *param = (__u32) readl(&board_ctrl->fwcmd_param);
+ cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
+ return 1;
+ }
+ return 0;
+} /* cyz_fetch_msg */
+
+static int
+cyz_issue_cmd(struct cyclades_card *cinfo,
+ __u32 channel, __u8 cmd, __u32 param)
+{
+ struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
+ __u32 __iomem *pci_doorbell;
+ unsigned int index;
+
+ if (!cyz_is_loaded(cinfo))
+ return -1;
+
+ index = 0;
+ pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
+ while ((readl(pci_doorbell) & 0xff) != 0) {
+ if (index++ == 1000)
+ return (int)(readl(pci_doorbell) & 0xff);
+ udelay(50L);
+ }
+ cy_writel(&board_ctrl->hcmd_channel, channel);
+ cy_writel(&board_ctrl->hcmd_param, param);
+ cy_writel(pci_doorbell, (long)cmd);
+
+ return 0;
+} /* cyz_issue_cmd */
+
+static void cyz_handle_rx(struct cyclades_port *info, struct tty_struct *tty)
+{
+ struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
+ struct cyclades_card *cinfo = info->card;
+ unsigned int char_count;
+ int len;
+#ifdef BLOCKMOVE
+ unsigned char *buf;
+#else
+ char data;
+#endif
+ __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
+
+ rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
+ rx_put = readl(&buf_ctrl->rx_put);
+ rx_bufsize = readl(&buf_ctrl->rx_bufsize);
+ rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
+ if (rx_put >= rx_get)
+ char_count = rx_put - rx_get;
+ else
+ char_count = rx_put - rx_get + rx_bufsize;
+
+ if (char_count) {
+#ifdef CY_ENABLE_MONITORING
+ info->mon.int_count++;
+ info->mon.char_count += char_count;
+ if (char_count > info->mon.char_max)
+ info->mon.char_max = char_count;
+ info->mon.char_last = char_count;
+#endif
+ if (tty == NULL) {
+ /* flush received characters */
+ new_rx_get = (new_rx_get + char_count) &
+ (rx_bufsize - 1);
+ info->rflush_count++;
+ } else {
+#ifdef BLOCKMOVE
+ /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
+ for performance, but because of buffer boundaries, there
+ may be several steps to the operation */
+ while (1) {
+ len = tty_prepare_flip_string(tty, &buf,
+ char_count);
+ if (!len)
+ break;
+
+ len = min_t(unsigned int, min(len, char_count),
+ rx_bufsize - new_rx_get);
+
+ memcpy_fromio(buf, cinfo->base_addr +
+ rx_bufaddr + new_rx_get, len);
+
+ new_rx_get = (new_rx_get + len) &
+ (rx_bufsize - 1);
+ char_count -= len;
+ info->icount.rx += len;
+ info->idle_stats.recv_bytes += len;
+ }
+#else
+ len = tty_buffer_request_room(tty, char_count);
+ while (len--) {
+ data = readb(cinfo->base_addr + rx_bufaddr +
+ new_rx_get);
+ new_rx_get = (new_rx_get + 1) &
+ (rx_bufsize - 1);
+ tty_insert_flip_char(tty, data, TTY_NORMAL);
+ info->idle_stats.recv_bytes++;
+ info->icount.rx++;
+ }
+#endif
+#ifdef CONFIG_CYZ_INTR
+ /* Recalculate the number of chars in the RX buffer and issue
+ a cmd in case it's higher than the RX high water mark */
+ rx_put = readl(&buf_ctrl->rx_put);
+ if (rx_put >= rx_get)
+ char_count = rx_put - rx_get;
+ else
+ char_count = rx_put - rx_get + rx_bufsize;
+ if (char_count >= readl(&buf_ctrl->rx_threshold) &&
+ !timer_pending(&cyz_rx_full_timer[
+ info->line]))
+ mod_timer(&cyz_rx_full_timer[info->line],
+ jiffies + 1);
+#endif
+ info->idle_stats.recv_idle = jiffies;
+ tty_schedule_flip(tty);
+ }
+ /* Update rx_get */
+ cy_writel(&buf_ctrl->rx_get, new_rx_get);
+ }
+}
+
+static void cyz_handle_tx(struct cyclades_port *info, struct tty_struct *tty)
+{
+ struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
+ struct cyclades_card *cinfo = info->card;
+ u8 data;
+ unsigned int char_count;
+#ifdef BLOCKMOVE
+ int small_count;
+#endif
+ __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
+
+ if (info->xmit_cnt <= 0) /* Nothing to transmit */
+ return;
+
+ tx_get = readl(&buf_ctrl->tx_get);
+ tx_put = readl(&buf_ctrl->tx_put);
+ tx_bufsize = readl(&buf_ctrl->tx_bufsize);
+ tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
+ if (tx_put >= tx_get)
+ char_count = tx_get - tx_put - 1 + tx_bufsize;
+ else
+ char_count = tx_get - tx_put - 1;
+
+ if (char_count) {
+
+ if (tty == NULL)
+ goto ztxdone;
+
+ if (info->x_char) { /* send special char */
+ data = info->x_char;
+
+ cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
+ tx_put = (tx_put + 1) & (tx_bufsize - 1);
+ info->x_char = 0;
+ char_count--;
+ info->icount.tx++;
+ }
+#ifdef BLOCKMOVE
+ while (0 < (small_count = min_t(unsigned int,
+ tx_bufsize - tx_put, min_t(unsigned int,
+ (SERIAL_XMIT_SIZE - info->xmit_tail),
+ min_t(unsigned int, info->xmit_cnt,
+ char_count))))) {
+
+ memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
+ tx_put),
+ &info->port.xmit_buf[info->xmit_tail],
+ small_count);
+
+ tx_put = (tx_put + small_count) & (tx_bufsize - 1);
+ char_count -= small_count;
+ info->icount.tx += small_count;
+ info->xmit_cnt -= small_count;
+ info->xmit_tail = (info->xmit_tail + small_count) &
+ (SERIAL_XMIT_SIZE - 1);
+ }
+#else
+ while (info->xmit_cnt && char_count) {
+ data = info->port.xmit_buf[info->xmit_tail];
+ info->xmit_cnt--;
+ info->xmit_tail = (info->xmit_tail + 1) &
+ (SERIAL_XMIT_SIZE - 1);
+
+ cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
+ tx_put = (tx_put + 1) & (tx_bufsize - 1);
+ char_count--;
+ info->icount.tx++;
+ }
+#endif
+ tty_wakeup(tty);
+ztxdone:
+ /* Update tx_put */
+ cy_writel(&buf_ctrl->tx_put, tx_put);
+ }
+}
+
+static void cyz_handle_cmd(struct cyclades_card *cinfo)
+{
+ struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
+ struct tty_struct *tty;
+ struct cyclades_port *info;
+ __u32 channel, param, fw_ver;
+ __u8 cmd;
+ int special_count;
+ int delta_count;
+
+ fw_ver = readl(&board_ctrl->fw_version);
+
+ while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
+ special_count = 0;
+ delta_count = 0;
+ info = &cinfo->ports[channel];
+ tty = tty_port_tty_get(&info->port);
+ if (tty == NULL)
+ continue;
+
+ switch (cmd) {
+ case C_CM_PR_ERROR:
+ tty_insert_flip_char(tty, 0, TTY_PARITY);
+ info->icount.rx++;
+ special_count++;
+ break;
+ case C_CM_FR_ERROR:
+ tty_insert_flip_char(tty, 0, TTY_FRAME);
+ info->icount.rx++;
+ special_count++;
+ break;
+ case C_CM_RXBRK:
+ tty_insert_flip_char(tty, 0, TTY_BREAK);
+ info->icount.rx++;
+ special_count++;
+ break;
+ case C_CM_MDCD:
+ info->icount.dcd++;
+ delta_count++;
+ if (info->port.flags & ASYNC_CHECK_CD) {
+ u32 dcd = fw_ver > 241 ? param :
+ readl(&info->u.cyz.ch_ctrl->rs_status);
+ if (dcd & C_RS_DCD)
+ wake_up_interruptible(&info->port.open_wait);
+ else
+ tty_hangup(tty);
+ }
+ break;
+ case C_CM_MCTS:
+ info->icount.cts++;
+ delta_count++;
+ break;
+ case C_CM_MRI:
+ info->icount.rng++;
+ delta_count++;
+ break;
+ case C_CM_MDSR:
+ info->icount.dsr++;
+ delta_count++;
+ break;
+#ifdef Z_WAKE
+ case C_CM_IOCTLW:
+ complete(&info->shutdown_wait);
+ break;
+#endif
+#ifdef CONFIG_CYZ_INTR
+ case C_CM_RXHIWM:
+ case C_CM_RXNNDT:
+ case C_CM_INTBACK2:
+ /* Reception Interrupt */
+#ifdef CY_DEBUG_INTERRUPTS
+ printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
+ "port %ld\n", info->card, channel);
+#endif
+ cyz_handle_rx(info, tty);
+ break;
+ case C_CM_TXBEMPTY:
+ case C_CM_TXLOWWM:
+ case C_CM_INTBACK:
+ /* Transmission Interrupt */
+#ifdef CY_DEBUG_INTERRUPTS
+ printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
+ "port %ld\n", info->card, channel);
+#endif
+ cyz_handle_tx(info, tty);
+ break;
+#endif /* CONFIG_CYZ_INTR */
+ case C_CM_FATAL:
+ /* should do something with this !!! */
+ break;
+ default:
+ break;
+ }
+ if (delta_count)
+ wake_up_interruptible(&info->port.delta_msr_wait);
+ if (special_count)
+ tty_schedule_flip(tty);
+ tty_kref_put(tty);
+ }
+}
+
+#ifdef CONFIG_CYZ_INTR
+static irqreturn_t cyz_interrupt(int irq, void *dev_id)
+{
+ struct cyclades_card *cinfo = dev_id;
+
+ if (unlikely(!cyz_is_loaded(cinfo))) {
+#ifdef CY_DEBUG_INTERRUPTS
+ printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
+ "(IRQ%d).\n", irq);
+#endif
+ return IRQ_NONE;
+ }
+
+ /* Handle the interrupts */
+ cyz_handle_cmd(cinfo);
+
+ return IRQ_HANDLED;
+} /* cyz_interrupt */
+
+static void cyz_rx_restart(unsigned long arg)
+{
+ struct cyclades_port *info = (struct cyclades_port *)arg;
+ struct cyclades_card *card = info->card;
+ int retval;
+ __u32 channel = info->line - card->first_line;
+ unsigned long flags;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+}
+
+#else /* CONFIG_CYZ_INTR */
+
+static void cyz_poll(unsigned long arg)
+{
+ struct cyclades_card *cinfo;
+ struct cyclades_port *info;
+ unsigned long expires = jiffies + HZ;
+ unsigned int port, card;
+
+ for (card = 0; card < NR_CARDS; card++) {
+ cinfo = &cy_card[card];
+
+ if (!cy_is_Z(cinfo))
+ continue;
+ if (!cyz_is_loaded(cinfo))
+ continue;
+
+ /* Skip first polling cycle to avoid racing conditions with the FW */
+ if (!cinfo->intr_enabled) {
+ cinfo->intr_enabled = 1;
+ continue;
+ }
+
+ cyz_handle_cmd(cinfo);
+
+ for (port = 0; port < cinfo->nports; port++) {
+ struct tty_struct *tty;
+
+ info = &cinfo->ports[port];
+ tty = tty_port_tty_get(&info->port);
+ /* OK to pass NULL to the handle functions below.
+ They need to drop the data in that case. */
+
+ if (!info->throttle)
+ cyz_handle_rx(info, tty);
+ cyz_handle_tx(info, tty);
+ tty_kref_put(tty);
+ }
+ /* poll every 'cyz_polling_cycle' period */
+ expires = jiffies + cyz_polling_cycle;
+ }
+ mod_timer(&cyz_timerlist, expires);
+} /* cyz_poll */
+
+#endif /* CONFIG_CYZ_INTR */
+
+/********** End of block of Cyclades-Z specific code *********/
+/***********************************************************/
+
+/* This is called whenever a port becomes active;
+ interrupts are enabled and DTR & RTS are turned on.
+ */
+static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
+{
+ struct cyclades_card *card;
+ unsigned long flags;
+ int retval = 0;
+ int channel;
+ unsigned long page;
+
+ card = info->card;
+ channel = info->line - card->first_line;
+
+ page = get_zeroed_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ if (info->port.flags & ASYNC_INITIALIZED)
+ goto errout;
+
+ if (!info->type) {
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ goto errout;
+ }
+
+ if (info->port.xmit_buf)
+ free_page(page);
+ else
+ info->port.xmit_buf = (unsigned char *)page;
+
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ cy_set_line_char(info, tty);
+
+ if (!cy_is_Z(card)) {
+ channel &= 0x03;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ cyy_writeb(info, CyCAR, channel);
+
+ cyy_writeb(info, CyRTPR,
+ (info->default_timeout ? info->default_timeout : 0x02));
+ /* 10ms rx timeout */
+
+ cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR);
+
+ cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
+
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData);
+ } else {
+ struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+
+ if (!cyz_is_loaded(card))
+ return -ENODEV;
+
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
+ "base_addr %p\n", card, channel, card->base_addr);
+#endif
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE);
+#ifdef Z_WAKE
+#ifdef CONFIG_CYZ_INTR
+ cy_writel(&ch_ctrl->intr_enable,
+ C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
+ C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
+#else
+ cy_writel(&ch_ctrl->intr_enable,
+ C_IN_IOCTLW | C_IN_MDCD);
+#endif /* CONFIG_CYZ_INTR */
+#else
+#ifdef CONFIG_CYZ_INTR
+ cy_writel(&ch_ctrl->intr_enable,
+ C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
+ C_IN_RXNNDT | C_IN_MDCD);
+#else
+ cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD);
+#endif /* CONFIG_CYZ_INTR */
+#endif /* Z_WAKE */
+
+ retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
+ "%x\n", info->line, retval);
+ }
+
+ /* Flush RX buffers before raising DTR and RTS */
+ retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
+ "%x\n", info->line, retval);
+ }
+
+ /* set timeout !!! */
+ /* set RTS and DTR !!! */
+ tty_port_raise_dtr_rts(&info->port);
+
+ /* enable send, recv, modem !!! */
+ }
+
+ info->port.flags |= ASYNC_INITIALIZED;
+
+ clear_bit(TTY_IO_ERROR, &tty->flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ info->breakon = info->breakoff = 0;
+ memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
+ info->idle_stats.in_use =
+ info->idle_stats.recv_idle =
+ info->idle_stats.xmit_idle = jiffies;
+
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc startup done\n");
+#endif
+ return 0;
+
+errout:
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ free_page(page);
+ return retval;
+} /* startup */
+
+static void start_xmit(struct cyclades_port *info)
+{
+ struct cyclades_card *card = info->card;
+ unsigned long flags;
+ int channel = info->line - card->first_line;
+
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_writeb(info, CyCAR, channel & 0x03);
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ } else {
+#ifdef CONFIG_CYZ_INTR
+ int retval;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
+ "%x\n", info->line, retval);
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+#else /* CONFIG_CYZ_INTR */
+ /* Don't have to do anything at this time */
+#endif /* CONFIG_CYZ_INTR */
+ }
+} /* start_xmit */
+
+/*
+ * This routine shuts down a serial port; interrupts are disabled,
+ * and DTR is dropped if the hangup on close termio flag is on.
+ */
+static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
+{
+ struct cyclades_card *card;
+ unsigned long flags;
+ int channel;
+
+ if (!(info->port.flags & ASYNC_INITIALIZED))
+ return;
+
+ card = info->card;
+ channel = info->line - card->first_line;
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ /* Clear delta_msr_wait queue to avoid mem leaks. */
+ wake_up_interruptible(&info->port.delta_msr_wait);
+
+ if (info->port.xmit_buf) {
+ unsigned char *temp;
+ temp = info->port.xmit_buf;
+ info->port.xmit_buf = NULL;
+ free_page((unsigned long)temp);
+ }
+ if (tty->termios->c_cflag & HUPCL)
+ cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
+
+ cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR);
+ /* it may be appropriate to clear _XMIT at
+ some later date (after testing)!!! */
+
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ info->port.flags &= ~ASYNC_INITIALIZED;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ } else {
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
+ "base_addr %p\n", card, channel, card->base_addr);
+#endif
+
+ if (!cyz_is_loaded(card))
+ return;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ if (info->port.xmit_buf) {
+ unsigned char *temp;
+ temp = info->port.xmit_buf;
+ info->port.xmit_buf = NULL;
+ free_page((unsigned long)temp);
+ }
+
+ if (tty->termios->c_cflag & HUPCL)
+ tty_port_lower_dtr_rts(&info->port);
+
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ info->port.flags &= ~ASYNC_INITIALIZED;
+
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ }
+
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc shutdown done\n");
+#endif
+} /* shutdown */
+
+/*
+ * ------------------------------------------------------------
+ * cy_open() and friends
+ * ------------------------------------------------------------
+ */
+
+/*
+ * This routine is called whenever a serial port is opened. It
+ * performs the serial-specific initialization for the tty structure.
+ */
+static int cy_open(struct tty_struct *tty, struct file *filp)
+{
+ struct cyclades_port *info;
+ unsigned int i, line;
+ int retval;
+
+ line = tty->index;
+ if (tty->index < 0 || NR_PORTS <= line)
+ return -ENODEV;
+
+ for (i = 0; i < NR_CARDS; i++)
+ if (line < cy_card[i].first_line + cy_card[i].nports &&
+ line >= cy_card[i].first_line)
+ break;
+ if (i >= NR_CARDS)
+ return -ENODEV;
+ info = &cy_card[i].ports[line - cy_card[i].first_line];
+ if (info->line < 0)
+ return -ENODEV;
+
+ /* If the card's firmware hasn't been loaded,
+ treat it as absent from the system. This
+ will make the user pay attention.
+ */
+ if (cy_is_Z(info->card)) {
+ struct cyclades_card *cinfo = info->card;
+ struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
+
+ if (!cyz_is_loaded(cinfo)) {
+ if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
+ readl(&firm_id->signature) ==
+ ZFIRM_HLT) {
+ printk(KERN_ERR "cyc:Cyclades-Z Error: you "
+ "need an external power supply for "
+ "this number of ports.\nFirmware "
+ "halted.\n");
+ } else {
+ printk(KERN_ERR "cyc:Cyclades-Z firmware not "
+ "yet loaded\n");
+ }
+ return -ENODEV;
+ }
+#ifdef CONFIG_CYZ_INTR
+ else {
+ /* In case this Z board is operating in interrupt mode, its
+ interrupts should be enabled as soon as the first open
+ happens to one of its ports. */
+ if (!cinfo->intr_enabled) {
+ u16 intr;
+
+ /* Enable interrupts on the PLX chip */
+ intr = readw(&cinfo->ctl_addr.p9060->
+ intr_ctrl_stat) | 0x0900;
+ cy_writew(&cinfo->ctl_addr.p9060->
+ intr_ctrl_stat, intr);
+ /* Enable interrupts on the FW */
+ retval = cyz_issue_cmd(cinfo, 0,
+ C_CM_IRQ_ENBL, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:IRQ enable retval "
+ "was %x\n", retval);
+ }
+ cinfo->intr_enabled = 1;
+ }
+ }
+#endif /* CONFIG_CYZ_INTR */
+ /* Make sure this Z port really exists in hardware */
+ if (info->line > (cinfo->first_line + cinfo->nports - 1))
+ return -ENODEV;
+ }
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
+#endif
+ tty->driver_data = info;
+ if (serial_paranoia_check(info, tty->name, "cy_open"))
+ return -ENODEV;
+
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
+ info->port.count);
+#endif
+ info->port.count++;
+#ifdef CY_DEBUG_COUNT
+ printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
+ current->pid, info->port.count);
+#endif
+
+ /*
+ * If the port is the middle of closing, bail out now
+ */
+ if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
+ wait_event_interruptible_tty(info->port.close_wait,
+ !(info->port.flags & ASYNC_CLOSING));
+ return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
+ }
+
+ /*
+ * Start up serial port
+ */
+ retval = cy_startup(info, tty);
+ if (retval)
+ return retval;
+
+ retval = tty_port_block_til_ready(&info->port, tty, filp);
+ if (retval) {
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
+ "with %d\n", retval);
+#endif
+ return retval;
+ }
+
+ info->throttle = 0;
+ tty_port_tty_set(&info->port, tty);
+
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc:cy_open done\n");
+#endif
+ return 0;
+} /* cy_open */
+
+/*
+ * cy_wait_until_sent() --- wait until the transmitter is empty
+ */
+static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ struct cyclades_card *card;
+ struct cyclades_port *info = tty->driver_data;
+ unsigned long orig_jiffies;
+ int char_time;
+
+ if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
+ return;
+
+ if (info->xmit_fifo_size == 0)
+ return; /* Just in case.... */
+
+ orig_jiffies = jiffies;
+ /*
+ * Set the check interval to be 1/5 of the estimated time to
+ * send a single character, and make it at least 1. The check
+ * interval should also be less than the timeout.
+ *
+ * Note: we have to use pretty tight timings here to satisfy
+ * the NIST-PCTS.
+ */
+ char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
+ char_time = char_time / 5;
+ if (char_time <= 0)
+ char_time = 1;
+ if (timeout < 0)
+ timeout = 0;
+ if (timeout)
+ char_time = min(char_time, timeout);
+ /*
+ * If the transmitter hasn't cleared in twice the approximate
+ * amount of time to send the entire FIFO, it probably won't
+ * ever clear. This assumes the UART isn't doing flow
+ * control, which is currently the case. Hence, if it ever
+ * takes longer than info->timeout, this is probably due to a
+ * UART bug of some kind. So, we clamp the timeout parameter at
+ * 2*info->timeout.
+ */
+ if (!timeout || timeout > 2 * info->timeout)
+ timeout = 2 * info->timeout;
+#ifdef CY_DEBUG_WAIT_UNTIL_SENT
+ printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
+ timeout, char_time, jiffies);
+#endif
+ card = info->card;
+ if (!cy_is_Z(card)) {
+ while (cyy_readb(info, CySRER) & CyTxRdy) {
+#ifdef CY_DEBUG_WAIT_UNTIL_SENT
+ printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
+#endif
+ if (msleep_interruptible(jiffies_to_msecs(char_time)))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies +
+ timeout))
+ break;
+ }
+ }
+ /* Run one more char cycle */
+ msleep_interruptible(jiffies_to_msecs(char_time * 5));
+#ifdef CY_DEBUG_WAIT_UNTIL_SENT
+ printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
+#endif
+}
+
+static void cy_flush_buffer(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ int channel, retval;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
+ return;
+
+ card = info->card;
+ channel = info->line - card->first_line;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
+ buffers as well */
+ spin_lock_irqsave(&card->card_lock, flags);
+ retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
+ "was %x\n", info->line, retval);
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ }
+ tty_wakeup(tty);
+} /* cy_flush_buffer */
+
+
+static void cy_do_close(struct tty_port *port)
+{
+ struct cyclades_port *info = container_of(port, struct cyclades_port,
+ port);
+ struct cyclades_card *card;
+ unsigned long flags;
+ int channel;
+
+ card = info->card;
+ channel = info->line - card->first_line;
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ if (!cy_is_Z(card)) {
+ /* Stop accepting input */
+ cyy_writeb(info, CyCAR, channel & 0x03);
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
+ if (info->port.flags & ASYNC_INITIALIZED) {
+ /* Waiting for on-board buffers to be empty before
+ closing the port */
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ cy_wait_until_sent(port->tty, info->timeout);
+ spin_lock_irqsave(&card->card_lock, flags);
+ }
+ } else {
+#ifdef Z_WAKE
+ /* Waiting for on-board buffers to be empty before closing
+ the port */
+ struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+ int retval;
+
+ if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) {
+ retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
+ if (retval != 0) {
+ printk(KERN_DEBUG "cyc:cy_close retval on "
+ "ttyC%d was %x\n", info->line, retval);
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ wait_for_completion_interruptible(&info->shutdown_wait);
+ spin_lock_irqsave(&card->card_lock, flags);
+ }
+#endif
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ cy_shutdown(info, port->tty);
+}
+
+/*
+ * This routine is called when a particular tty device is closed.
+ */
+static void cy_close(struct tty_struct *tty, struct file *filp)
+{
+ struct cyclades_port *info = tty->driver_data;
+ if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
+ return;
+ tty_port_close(&info->port, tty, filp);
+} /* cy_close */
+
+/* This routine gets called when tty_write has put something into
+ * the write_queue. The characters may come from user space or
+ * kernel space.
+ *
+ * This routine will return the number of characters actually
+ * accepted for writing.
+ *
+ * If the port is not already transmitting stuff, start it off by
+ * enabling interrupts. The interrupt service routine will then
+ * ensure that the characters are sent.
+ * If the port is already active, there is no need to kick it.
+ *
+ */
+static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
+{
+ struct cyclades_port *info = tty->driver_data;
+ unsigned long flags;
+ int c, ret = 0;
+
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_write"))
+ return 0;
+
+ if (!info->port.xmit_buf)
+ return 0;
+
+ spin_lock_irqsave(&info->card->card_lock, flags);
+ while (1) {
+ c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
+ c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
+
+ if (c <= 0)
+ break;
+
+ memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
+ info->xmit_head = (info->xmit_head + c) &
+ (SERIAL_XMIT_SIZE - 1);
+ info->xmit_cnt += c;
+ buf += c;
+ count -= c;
+ ret += c;
+ }
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+
+ info->idle_stats.xmit_bytes += ret;
+ info->idle_stats.xmit_idle = jiffies;
+
+ if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
+ start_xmit(info);
+
+ return ret;
+} /* cy_write */
+
+/*
+ * This routine is called by the kernel to write a single
+ * character to the tty device. If the kernel uses this routine,
+ * it must call the flush_chars() routine (if defined) when it is
+ * done stuffing characters into the driver. If there is no room
+ * in the queue, the character is ignored.
+ */
+static int cy_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct cyclades_port *info = tty->driver_data;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_put_char"))
+ return 0;
+
+ if (!info->port.xmit_buf)
+ return 0;
+
+ spin_lock_irqsave(&info->card->card_lock, flags);
+ if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+ return 0;
+ }
+
+ info->port.xmit_buf[info->xmit_head++] = ch;
+ info->xmit_head &= SERIAL_XMIT_SIZE - 1;
+ info->xmit_cnt++;
+ info->idle_stats.xmit_bytes++;
+ info->idle_stats.xmit_idle = jiffies;
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+ return 1;
+} /* cy_put_char */
+
+/*
+ * This routine is called by the kernel after it has written a
+ * series of characters to the tty device using put_char().
+ */
+static void cy_flush_chars(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
+ return;
+
+ if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
+ !info->port.xmit_buf)
+ return;
+
+ start_xmit(info);
+} /* cy_flush_chars */
+
+/*
+ * This routine returns the numbers of characters the tty driver
+ * will accept for queuing to be written. This number is subject
+ * to change as output buffers get emptied, or if the output flow
+ * control is activated.
+ */
+static int cy_write_room(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+ int ret;
+
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_write_room"))
+ return 0;
+ ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
+ if (ret < 0)
+ ret = 0;
+ return ret;
+} /* cy_write_room */
+
+static int cy_chars_in_buffer(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
+ return 0;
+
+#ifdef Z_EXT_CHARS_IN_BUFFER
+ if (!cy_is_Z(info->card)) {
+#endif /* Z_EXT_CHARS_IN_BUFFER */
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
+ info->line, info->xmit_cnt);
+#endif
+ return info->xmit_cnt;
+#ifdef Z_EXT_CHARS_IN_BUFFER
+ } else {
+ struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
+ int char_count;
+ __u32 tx_put, tx_get, tx_bufsize;
+
+ tx_get = readl(&buf_ctrl->tx_get);
+ tx_put = readl(&buf_ctrl->tx_put);
+ tx_bufsize = readl(&buf_ctrl->tx_bufsize);
+ if (tx_put >= tx_get)
+ char_count = tx_put - tx_get;
+ else
+ char_count = tx_put - tx_get + tx_bufsize;
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
+ info->line, info->xmit_cnt + char_count);
+#endif
+ return info->xmit_cnt + char_count;
+ }
+#endif /* Z_EXT_CHARS_IN_BUFFER */
+} /* cy_chars_in_buffer */
+
+/*
+ * ------------------------------------------------------------
+ * cy_ioctl() and friends
+ * ------------------------------------------------------------
+ */
+
+static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
+{
+ int co, co_val, bpr;
+ __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
+ 25000000);
+
+ if (baud == 0) {
+ info->tbpr = info->tco = info->rbpr = info->rco = 0;
+ return;
+ }
+
+ /* determine which prescaler to use */
+ for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
+ if (cy_clock / co_val / baud > 63)
+ break;
+ }
+
+ bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
+ if (bpr > 255)
+ bpr = 255;
+
+ info->tbpr = info->rbpr = bpr;
+ info->tco = info->rco = co;
+}
+
+/*
+ * This routine finds or computes the various line characteristics.
+ * It used to be called config_setup
+ */
+static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
+{
+ struct cyclades_card *card;
+ unsigned long flags;
+ int channel;
+ unsigned cflag, iflag;
+ int baud, baud_rate = 0;
+ int i;
+
+ if (!tty->termios) /* XXX can this happen at all? */
+ return;
+
+ if (info->line == -1)
+ return;
+
+ cflag = tty->termios->c_cflag;
+ iflag = tty->termios->c_iflag;
+
+ /*
+ * Set up the tty->alt_speed kludge
+ */
+ if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ tty->alt_speed = 57600;
+ if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ tty->alt_speed = 115200;
+ if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+ tty->alt_speed = 230400;
+ if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+ tty->alt_speed = 460800;
+
+ card = info->card;
+ channel = info->line - card->first_line;
+
+ if (!cy_is_Z(card)) {
+ u32 cflags;
+
+ /* baud rate */
+ baud = tty_get_baud_rate(tty);
+ if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+ ASYNC_SPD_CUST) {
+ if (info->custom_divisor)
+ baud_rate = info->baud / info->custom_divisor;
+ else
+ baud_rate = info->baud;
+ } else if (baud > CD1400_MAX_SPEED) {
+ baud = CD1400_MAX_SPEED;
+ }
+ /* find the baud index */
+ for (i = 0; i < 20; i++) {
+ if (baud == baud_table[i])
+ break;
+ }
+ if (i == 20)
+ i = 19; /* CD1400_MAX_SPEED */
+
+ if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+ ASYNC_SPD_CUST) {
+ cyy_baud_calc(info, baud_rate);
+ } else {
+ if (info->chip_rev >= CD1400_REV_J) {
+ /* It is a CD1400 rev. J or later */
+ info->tbpr = baud_bpr_60[i]; /* Tx BPR */
+ info->tco = baud_co_60[i]; /* Tx CO */
+ info->rbpr = baud_bpr_60[i]; /* Rx BPR */
+ info->rco = baud_co_60[i]; /* Rx CO */
+ } else {
+ info->tbpr = baud_bpr_25[i]; /* Tx BPR */
+ info->tco = baud_co_25[i]; /* Tx CO */
+ info->rbpr = baud_bpr_25[i]; /* Rx BPR */
+ info->rco = baud_co_25[i]; /* Rx CO */
+ }
+ }
+ if (baud_table[i] == 134) {
+ /* get it right for 134.5 baud */
+ info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
+ 2;
+ } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+ ASYNC_SPD_CUST) {
+ info->timeout = (info->xmit_fifo_size * HZ * 15 /
+ baud_rate) + 2;
+ } else if (baud_table[i]) {
+ info->timeout = (info->xmit_fifo_size * HZ * 15 /
+ baud_table[i]) + 2;
+ /* this needs to be propagated into the card info */
+ } else {
+ info->timeout = 0;
+ }
+ /* By tradition (is it a standard?) a baud rate of zero
+ implies the line should be/has been closed. A bit
+ later in this routine such a test is performed. */
+
+ /* byte size and parity */
+ info->cor5 = 0;
+ info->cor4 = 0;
+ /* receive threshold */
+ info->cor3 = (info->default_threshold ?
+ info->default_threshold : baud_cor3[i]);
+ info->cor2 = CyETC;
+ switch (cflag & CSIZE) {
+ case CS5:
+ info->cor1 = Cy_5_BITS;
+ break;
+ case CS6:
+ info->cor1 = Cy_6_BITS;
+ break;
+ case CS7:
+ info->cor1 = Cy_7_BITS;
+ break;
+ case CS8:
+ info->cor1 = Cy_8_BITS;
+ break;
+ }
+ if (cflag & CSTOPB)
+ info->cor1 |= Cy_2_STOP;
+
+ if (cflag & PARENB) {
+ if (cflag & PARODD)
+ info->cor1 |= CyPARITY_O;
+ else
+ info->cor1 |= CyPARITY_E;
+ } else
+ info->cor1 |= CyPARITY_NONE;
+
+ /* CTS flow control flag */
+ if (cflag & CRTSCTS) {
+ info->port.flags |= ASYNC_CTS_FLOW;
+ info->cor2 |= CyCtsAE;
+ } else {
+ info->port.flags &= ~ASYNC_CTS_FLOW;
+ info->cor2 &= ~CyCtsAE;
+ }
+ if (cflag & CLOCAL)
+ info->port.flags &= ~ASYNC_CHECK_CD;
+ else
+ info->port.flags |= ASYNC_CHECK_CD;
+
+ /***********************************************
+ The hardware option, CyRtsAO, presents RTS when
+ the chip has characters to send. Since most modems
+ use RTS as reverse (inbound) flow control, this
+ option is not used. If inbound flow control is
+ necessary, DTR can be programmed to provide the
+ appropriate signals for use with a non-standard
+ cable. Contact Marcio Saito for details.
+ ***********************************************/
+
+ channel &= 0x03;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_writeb(info, CyCAR, channel);
+
+ /* tx and rx baud rate */
+
+ cyy_writeb(info, CyTCOR, info->tco);
+ cyy_writeb(info, CyTBPR, info->tbpr);
+ cyy_writeb(info, CyRCOR, info->rco);
+ cyy_writeb(info, CyRBPR, info->rbpr);
+
+ /* set line characteristics according configuration */
+
+ cyy_writeb(info, CySCHR1, START_CHAR(tty));
+ cyy_writeb(info, CySCHR2, STOP_CHAR(tty));
+ cyy_writeb(info, CyCOR1, info->cor1);
+ cyy_writeb(info, CyCOR2, info->cor2);
+ cyy_writeb(info, CyCOR3, info->cor3);
+ cyy_writeb(info, CyCOR4, info->cor4);
+ cyy_writeb(info, CyCOR5, info->cor5);
+
+ cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
+ CyCOR3ch);
+
+ /* !!! Is this needed? */
+ cyy_writeb(info, CyCAR, channel);
+ cyy_writeb(info, CyRTPR,
+ (info->default_timeout ? info->default_timeout : 0x02));
+ /* 10ms rx timeout */
+
+ cflags = CyCTS;
+ if (!C_CLOCAL(tty))
+ cflags |= CyDSR | CyRI | CyDCD;
+ /* without modem intr */
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh);
+ /* act on 1->0 modem transitions */
+ if ((cflag & CRTSCTS) && info->rflow)
+ cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]);
+ else
+ cyy_writeb(info, CyMCOR1, cflags);
+ /* act on 0->1 modem transitions */
+ cyy_writeb(info, CyMCOR2, cflags);
+
+ if (i == 0) /* baud rate is zero, turn off line */
+ cyy_change_rts_dtr(info, 0, TIOCM_DTR);
+ else
+ cyy_change_rts_dtr(info, TIOCM_DTR, 0);
+
+ clear_bit(TTY_IO_ERROR, &tty->flags);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ } else {
+ struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+ __u32 sw_flow;
+ int retval;
+
+ if (!cyz_is_loaded(card))
+ return;
+
+ /* baud rate */
+ baud = tty_get_baud_rate(tty);
+ if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+ ASYNC_SPD_CUST) {
+ if (info->custom_divisor)
+ baud_rate = info->baud / info->custom_divisor;
+ else
+ baud_rate = info->baud;
+ } else if (baud > CYZ_MAX_SPEED) {
+ baud = CYZ_MAX_SPEED;
+ }
+ cy_writel(&ch_ctrl->comm_baud, baud);
+
+ if (baud == 134) {
+ /* get it right for 134.5 baud */
+ info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
+ 2;
+ } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+ ASYNC_SPD_CUST) {
+ info->timeout = (info->xmit_fifo_size * HZ * 15 /
+ baud_rate) + 2;
+ } else if (baud) {
+ info->timeout = (info->xmit_fifo_size * HZ * 15 /
+ baud) + 2;
+ /* this needs to be propagated into the card info */
+ } else {
+ info->timeout = 0;
+ }
+
+ /* byte size and parity */
+ switch (cflag & CSIZE) {
+ case CS5:
+ cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
+ break;
+ case CS6:
+ cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
+ break;
+ case CS7:
+ cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
+ break;
+ case CS8:
+ cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
+ break;
+ }
+ if (cflag & CSTOPB) {
+ cy_writel(&ch_ctrl->comm_data_l,
+ readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
+ } else {
+ cy_writel(&ch_ctrl->comm_data_l,
+ readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
+ }
+ if (cflag & PARENB) {
+ if (cflag & PARODD)
+ cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
+ else
+ cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
+ } else
+ cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
+
+ /* CTS flow control flag */
+ if (cflag & CRTSCTS) {
+ cy_writel(&ch_ctrl->hw_flow,
+ readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
+ } else {
+ cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
+ ~(C_RS_CTS | C_RS_RTS));
+ }
+ /* As the HW flow control is done in firmware, the driver
+ doesn't need to care about it */
+ info->port.flags &= ~ASYNC_CTS_FLOW;
+
+ /* XON/XOFF/XANY flow control flags */
+ sw_flow = 0;
+ if (iflag & IXON) {
+ sw_flow |= C_FL_OXX;
+ if (iflag & IXANY)
+ sw_flow |= C_FL_OIXANY;
+ }
+ cy_writel(&ch_ctrl->sw_flow, sw_flow);
+
+ retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
+ "was %x\n", info->line, retval);
+ }
+
+ /* CD sensitivity */
+ if (cflag & CLOCAL)
+ info->port.flags &= ~ASYNC_CHECK_CD;
+ else
+ info->port.flags |= ASYNC_CHECK_CD;
+
+ if (baud == 0) { /* baud rate is zero, turn off line */
+ cy_writel(&ch_ctrl->rs_control,
+ readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
+#endif
+ } else {
+ cy_writel(&ch_ctrl->rs_control,
+ readl(&ch_ctrl->rs_control) | C_RS_DTR);
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
+#endif
+ }
+
+ retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
+ "was %x\n", info->line, retval);
+ }
+
+ clear_bit(TTY_IO_ERROR, &tty->flags);
+ }
+} /* set_line_char */
+
+static int cy_get_serial_info(struct cyclades_port *info,
+ struct serial_struct __user *retinfo)
+{
+ struct cyclades_card *cinfo = info->card;
+ struct serial_struct tmp = {
+ .type = info->type,
+ .line = info->line,
+ .port = (info->card - cy_card) * 0x100 + info->line -
+ cinfo->first_line,
+ .irq = cinfo->irq,
+ .flags = info->port.flags,
+ .close_delay = info->port.close_delay,
+ .closing_wait = info->port.closing_wait,
+ .baud_base = info->baud,
+ .custom_divisor = info->custom_divisor,
+ .hub6 = 0, /*!!! */
+ };
+ return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
+}
+
+static int
+cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
+ struct serial_struct __user *new_info)
+{
+ struct serial_struct new_serial;
+ int ret;
+
+ if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
+ return -EFAULT;
+
+ mutex_lock(&info->port.mutex);
+ if (!capable(CAP_SYS_ADMIN)) {
+ if (new_serial.close_delay != info->port.close_delay ||
+ new_serial.baud_base != info->baud ||
+ (new_serial.flags & ASYNC_FLAGS &
+ ~ASYNC_USR_MASK) !=
+ (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
+ {
+ mutex_unlock(&info->port.mutex);
+ return -EPERM;
+ }
+ info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
+ (new_serial.flags & ASYNC_USR_MASK);
+ info->baud = new_serial.baud_base;
+ info->custom_divisor = new_serial.custom_divisor;
+ goto check_and_exit;
+ }
+
+ /*
+ * OK, past this point, all the error checking has been done.
+ * At this point, we start making changes.....
+ */
+
+ info->baud = new_serial.baud_base;
+ info->custom_divisor = new_serial.custom_divisor;
+ info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
+ (new_serial.flags & ASYNC_FLAGS);
+ info->port.close_delay = new_serial.close_delay * HZ / 100;
+ info->port.closing_wait = new_serial.closing_wait * HZ / 100;
+
+check_and_exit:
+ if (info->port.flags & ASYNC_INITIALIZED) {
+ cy_set_line_char(info, tty);
+ ret = 0;
+ } else {
+ ret = cy_startup(info, tty);
+ }
+ mutex_unlock(&info->port.mutex);
+ return ret;
+} /* set_serial_info */
+
+/*
+ * get_lsr_info - get line status register info
+ *
+ * Purpose: Let user call ioctl() to get info when the UART physically
+ * is emptied. On bus types like RS485, the transmitter must
+ * release the bus after transmitting. This must be done when
+ * the transmit shift register is empty, not be done when the
+ * transmit holding register is empty. This functionality
+ * allows an RS485 driver to be written in user space.
+ */
+static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
+{
+ struct cyclades_card *card = info->card;
+ unsigned int result;
+ unsigned long flags;
+ u8 status;
+
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ result = (status ? 0 : TIOCSER_TEMT);
+ } else {
+ /* Not supported yet */
+ return -EINVAL;
+ }
+ return put_user(result, (unsigned long __user *)value);
+}
+
+static int cy_tiocmget(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ int result;
+
+ if (serial_paranoia_check(info, tty->name, __func__))
+ return -ENODEV;
+
+ card = info->card;
+
+ if (!cy_is_Z(card)) {
+ unsigned long flags;
+ int channel = info->line - card->first_line;
+ u8 status;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_writeb(info, CyCAR, channel & 0x03);
+ status = cyy_readb(info, CyMSVR1);
+ status |= cyy_readb(info, CyMSVR2);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ if (info->rtsdtr_inv) {
+ result = ((status & CyRTS) ? TIOCM_DTR : 0) |
+ ((status & CyDTR) ? TIOCM_RTS : 0);
+ } else {
+ result = ((status & CyRTS) ? TIOCM_RTS : 0) |
+ ((status & CyDTR) ? TIOCM_DTR : 0);
+ }
+ result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
+ ((status & CyRI) ? TIOCM_RNG : 0) |
+ ((status & CyDSR) ? TIOCM_DSR : 0) |
+ ((status & CyCTS) ? TIOCM_CTS : 0);
+ } else {
+ u32 lstatus;
+
+ if (!cyz_is_loaded(card)) {
+ result = -ENODEV;
+ goto end;
+ }
+
+ lstatus = readl(&info->u.cyz.ch_ctrl->rs_status);
+ result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
+ ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
+ ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
+ ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
+ ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
+ ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
+ }
+end:
+ return result;
+} /* cy_tiomget */
+
+static int
+cy_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->name, __func__))
+ return -ENODEV;
+
+ card = info->card;
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_change_rts_dtr(info, set, clear);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ } else {
+ struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+ int retval, channel = info->line - card->first_line;
+ u32 rs;
+
+ if (!cyz_is_loaded(card))
+ return -ENODEV;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ rs = readl(&ch_ctrl->rs_control);
+ if (set & TIOCM_RTS)
+ rs |= C_RS_RTS;
+ if (clear & TIOCM_RTS)
+ rs &= ~C_RS_RTS;
+ if (set & TIOCM_DTR) {
+ rs |= C_RS_DTR;
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n");
+#endif
+ }
+ if (clear & TIOCM_DTR) {
+ rs &= ~C_RS_DTR;
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "cyc:set_modem_info clearing "
+ "Z DTR\n");
+#endif
+ }
+ cy_writel(&ch_ctrl->rs_control, rs);
+ retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
+ "was %x\n", info->line, retval);
+ }
+ }
+ return 0;
+}
+
+/*
+ * cy_break() --- routine which turns the break handling on or off
+ */
+static int cy_break(struct tty_struct *tty, int break_state)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ unsigned long flags;
+ int retval = 0;
+
+ if (serial_paranoia_check(info, tty->name, "cy_break"))
+ return -EINVAL;
+
+ card = info->card;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (!cy_is_Z(card)) {
+ /* Let the transmit ISR take care of this (since it
+ requires stuffing characters into the output stream).
+ */
+ if (break_state == -1) {
+ if (!info->breakon) {
+ info->breakon = 1;
+ if (!info->xmit_cnt) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ start_xmit(info);
+ spin_lock_irqsave(&card->card_lock, flags);
+ }
+ }
+ } else {
+ if (!info->breakoff) {
+ info->breakoff = 1;
+ if (!info->xmit_cnt) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ start_xmit(info);
+ spin_lock_irqsave(&card->card_lock, flags);
+ }
+ }
+ }
+ } else {
+ if (break_state == -1) {
+ retval = cyz_issue_cmd(card,
+ info->line - card->first_line,
+ C_CM_SET_BREAK, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:cy_break (set) retval on "
+ "ttyC%d was %x\n", info->line, retval);
+ }
+ } else {
+ retval = cyz_issue_cmd(card,
+ info->line - card->first_line,
+ C_CM_CLR_BREAK, 0L);
+ if (retval != 0) {
+ printk(KERN_DEBUG "cyc:cy_break (clr) retval "
+ "on ttyC%d was %x\n", info->line,
+ retval);
+ }
+ }
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ return retval;
+} /* cy_break */
+
+static int set_threshold(struct cyclades_port *info, unsigned long value)
+{
+ struct cyclades_card *card = info->card;
+ unsigned long flags;
+
+ if (!cy_is_Z(card)) {
+ info->cor3 &= ~CyREC_FIFO;
+ info->cor3 |= value & CyREC_FIFO;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_writeb(info, CyCOR3, info->cor3);
+ cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ }
+ return 0;
+} /* set_threshold */
+
+static int get_threshold(struct cyclades_port *info,
+ unsigned long __user *value)
+{
+ struct cyclades_card *card = info->card;
+
+ if (!cy_is_Z(card)) {
+ u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO;
+ return put_user(tmp, value);
+ }
+ return 0;
+} /* get_threshold */
+
+static int set_timeout(struct cyclades_port *info, unsigned long value)
+{
+ struct cyclades_card *card = info->card;
+ unsigned long flags;
+
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_writeb(info, CyRTPR, value & 0xff);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ }
+ return 0;
+} /* set_timeout */
+
+static int get_timeout(struct cyclades_port *info,
+ unsigned long __user *value)
+{
+ struct cyclades_card *card = info->card;
+
+ if (!cy_is_Z(card)) {
+ u8 tmp = cyy_readb(info, CyRTPR);
+ return put_user(tmp, value);
+ }
+ return 0;
+} /* get_timeout */
+
+static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg,
+ struct cyclades_icount *cprev)
+{
+ struct cyclades_icount cnow;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&info->card->card_lock, flags);
+ cnow = info->icount; /* atomic copy */
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+
+ ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
+ ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
+ ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
+ ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
+
+ *cprev = cnow;
+
+ return ret;
+}
+
+/*
+ * This routine allows the tty driver to implement device-
+ * specific ioctl's. If the ioctl number passed in cmd is
+ * not recognized by the driver, it should return ENOIOCTLCMD.
+ */
+static int
+cy_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_icount cnow; /* kernel counter temps */
+ int ret_val = 0;
+ unsigned long flags;
+ void __user *argp = (void __user *)arg;
+
+ if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
+ return -ENODEV;
+
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
+ info->line, cmd, arg);
+#endif
+
+ switch (cmd) {
+ case CYGETMON:
+ if (copy_to_user(argp, &info->mon, sizeof(info->mon))) {
+ ret_val = -EFAULT;
+ break;
+ }
+ memset(&info->mon, 0, sizeof(info->mon));
+ break;
+ case CYGETTHRESH:
+ ret_val = get_threshold(info, argp);
+ break;
+ case CYSETTHRESH:
+ ret_val = set_threshold(info, arg);
+ break;
+ case CYGETDEFTHRESH:
+ ret_val = put_user(info->default_threshold,
+ (unsigned long __user *)argp);
+ break;
+ case CYSETDEFTHRESH:
+ info->default_threshold = arg & 0x0f;
+ break;
+ case CYGETTIMEOUT:
+ ret_val = get_timeout(info, argp);
+ break;
+ case CYSETTIMEOUT:
+ ret_val = set_timeout(info, arg);
+ break;
+ case CYGETDEFTIMEOUT:
+ ret_val = put_user(info->default_timeout,
+ (unsigned long __user *)argp);
+ break;
+ case CYSETDEFTIMEOUT:
+ info->default_timeout = arg & 0xff;
+ break;
+ case CYSETRFLOW:
+ info->rflow = (int)arg;
+ break;
+ case CYGETRFLOW:
+ ret_val = info->rflow;
+ break;
+ case CYSETRTSDTR_INV:
+ info->rtsdtr_inv = (int)arg;
+ break;
+ case CYGETRTSDTR_INV:
+ ret_val = info->rtsdtr_inv;
+ break;
+ case CYGETCD1400VER:
+ ret_val = info->chip_rev;
+ break;
+#ifndef CONFIG_CYZ_INTR
+ case CYZSETPOLLCYCLE:
+ cyz_polling_cycle = (arg * HZ) / 1000;
+ break;
+ case CYZGETPOLLCYCLE:
+ ret_val = (cyz_polling_cycle * 1000) / HZ;
+ break;
+#endif /* CONFIG_CYZ_INTR */
+ case CYSETWAIT:
+ info->port.closing_wait = (unsigned short)arg * HZ / 100;
+ break;
+ case CYGETWAIT:
+ ret_val = info->port.closing_wait / (HZ / 100);
+ break;
+ case TIOCGSERIAL:
+ ret_val = cy_get_serial_info(info, argp);
+ break;
+ case TIOCSSERIAL:
+ ret_val = cy_set_serial_info(info, tty, argp);
+ break;
+ case TIOCSERGETLSR: /* Get line status register */
+ ret_val = get_lsr_info(info, argp);
+ break;
+ /*
+ * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
+ * - mask passed in arg for lines of interest
+ * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
+ * Caller should use TIOCGICOUNT to see which one it was
+ */
+ case TIOCMIWAIT:
+ spin_lock_irqsave(&info->card->card_lock, flags);
+ /* note the counters on entry */
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+ ret_val = wait_event_interruptible(info->port.delta_msr_wait,
+ cy_cflags_changed(info, arg, &cnow));
+ break;
+
+ /*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for
+ * RI where only 0->1 is counted.
+ */
+ default:
+ ret_val = -ENOIOCTLCMD;
+ }
+
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_ioctl done\n");
+#endif
+ return ret_val;
+} /* cy_ioctl */
+
+static int cy_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *sic)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_icount cnow; /* Used to snapshot */
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->card->card_lock, flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+
+ sic->cts = cnow.cts;
+ sic->dsr = cnow.dsr;
+ sic->rng = cnow.rng;
+ sic->dcd = cnow.dcd;
+ sic->rx = cnow.rx;
+ sic->tx = cnow.tx;
+ sic->frame = cnow.frame;
+ sic->overrun = cnow.overrun;
+ sic->parity = cnow.parity;
+ sic->brk = cnow.brk;
+ sic->buf_overrun = cnow.buf_overrun;
+ return 0;
+}
+
+/*
+ * This routine allows the tty driver to be notified when
+ * device's termios settings have changed. Note that a
+ * well-designed tty driver should be prepared to accept the case
+ * where old == NULL, and try to do something rational.
+ */
+static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+{
+ struct cyclades_port *info = tty->driver_data;
+
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
+#endif
+
+ cy_set_line_char(info, tty);
+
+ if ((old_termios->c_cflag & CRTSCTS) &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ cy_start(tty);
+ }
+#if 0
+ /*
+ * No need to wake up processes in open wait, since they
+ * sample the CLOCAL flag once, and don't recheck it.
+ * XXX It's not clear whether the current behavior is correct
+ * or not. Hence, this may change.....
+ */
+ if (!(old_termios->c_cflag & CLOCAL) &&
+ (tty->termios->c_cflag & CLOCAL))
+ wake_up_interruptible(&info->port.open_wait);
+#endif
+} /* cy_set_termios */
+
+/* This function is used to send a high-priority XON/XOFF character to
+ the device.
+*/
+static void cy_send_xchar(struct tty_struct *tty, char ch)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ int channel;
+
+ if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
+ return;
+
+ info->x_char = ch;
+
+ if (ch)
+ cy_start(tty);
+
+ card = info->card;
+ channel = info->line - card->first_line;
+
+ if (cy_is_Z(card)) {
+ if (ch == STOP_CHAR(tty))
+ cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
+ else if (ch == START_CHAR(tty))
+ cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
+ }
+}
+
+/* This routine is called by the upper-layer tty layer to signal
+ that incoming characters should be throttled because the input
+ buffers are close to full.
+ */
+static void cy_throttle(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_THROTTLE
+ char buf[64];
+
+ printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
+ tty->ldisc.chars_in_buffer(tty), info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_throttle"))
+ return;
+
+ card = info->card;
+
+ if (I_IXOFF(tty)) {
+ if (!cy_is_Z(card))
+ cy_send_xchar(tty, STOP_CHAR(tty));
+ else
+ info->throttle = 1;
+ }
+
+ if (tty->termios->c_cflag & CRTSCTS) {
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_change_rts_dtr(info, 0, TIOCM_RTS);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ } else {
+ info->throttle = 1;
+ }
+ }
+} /* cy_throttle */
+
+/*
+ * This routine notifies the tty driver that it should signal
+ * that characters can now be sent to the tty without fear of
+ * overrunning the input buffers of the line disciplines.
+ */
+static void cy_unthrottle(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_THROTTLE
+ char buf[64];
+
+ printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
+ tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
+ return;
+
+ if (I_IXOFF(tty)) {
+ if (info->x_char)
+ info->x_char = 0;
+ else
+ cy_send_xchar(tty, START_CHAR(tty));
+ }
+
+ if (tty->termios->c_cflag & CRTSCTS) {
+ card = info->card;
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_change_rts_dtr(info, TIOCM_RTS, 0);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ } else {
+ info->throttle = 0;
+ }
+ }
+} /* cy_unthrottle */
+
+/* cy_start and cy_stop provide software output flow control as a
+ function of XON/XOFF, software CTS, and other such stuff.
+*/
+static void cy_stop(struct tty_struct *tty)
+{
+ struct cyclades_card *cinfo;
+ struct cyclades_port *info = tty->driver_data;
+ int channel;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_stop"))
+ return;
+
+ cinfo = info->card;
+ channel = info->line - cinfo->first_line;
+ if (!cy_is_Z(cinfo)) {
+ spin_lock_irqsave(&cinfo->card_lock, flags);
+ cyy_writeb(info, CyCAR, channel & 0x03);
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
+ spin_unlock_irqrestore(&cinfo->card_lock, flags);
+ }
+} /* cy_stop */
+
+static void cy_start(struct tty_struct *tty)
+{
+ struct cyclades_card *cinfo;
+ struct cyclades_port *info = tty->driver_data;
+ int channel;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_start"))
+ return;
+
+ cinfo = info->card;
+ channel = info->line - cinfo->first_line;
+ if (!cy_is_Z(cinfo)) {
+ spin_lock_irqsave(&cinfo->card_lock, flags);
+ cyy_writeb(info, CyCAR, channel & 0x03);
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
+ spin_unlock_irqrestore(&cinfo->card_lock, flags);
+ }
+} /* cy_start */
+
+/*
+ * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+static void cy_hangup(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_hangup"))
+ return;
+
+ cy_flush_buffer(tty);
+ cy_shutdown(info, tty);
+ tty_port_hangup(&info->port);
+} /* cy_hangup */
+
+static int cyy_carrier_raised(struct tty_port *port)
+{
+ struct cyclades_port *info = container_of(port, struct cyclades_port,
+ port);
+ struct cyclades_card *cinfo = info->card;
+ unsigned long flags;
+ int channel = info->line - cinfo->first_line;
+ u32 cd;
+
+ spin_lock_irqsave(&cinfo->card_lock, flags);
+ cyy_writeb(info, CyCAR, channel & 0x03);
+ cd = cyy_readb(info, CyMSVR1) & CyDCD;
+ spin_unlock_irqrestore(&cinfo->card_lock, flags);
+
+ return cd;
+}
+
+static void cyy_dtr_rts(struct tty_port *port, int raise)
+{
+ struct cyclades_port *info = container_of(port, struct cyclades_port,
+ port);
+ struct cyclades_card *cinfo = info->card;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cinfo->card_lock, flags);
+ cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
+ raise ? 0 : TIOCM_RTS | TIOCM_DTR);
+ spin_unlock_irqrestore(&cinfo->card_lock, flags);
+}
+
+static int cyz_carrier_raised(struct tty_port *port)
+{
+ struct cyclades_port *info = container_of(port, struct cyclades_port,
+ port);
+
+ return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD;
+}
+
+static void cyz_dtr_rts(struct tty_port *port, int raise)
+{
+ struct cyclades_port *info = container_of(port, struct cyclades_port,
+ port);
+ struct cyclades_card *cinfo = info->card;
+ struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+ int ret, channel = info->line - cinfo->first_line;
+ u32 rs;
+
+ rs = readl(&ch_ctrl->rs_control);
+ if (raise)
+ rs |= C_RS_RTS | C_RS_DTR;
+ else
+ rs &= ~(C_RS_RTS | C_RS_DTR);
+ cy_writel(&ch_ctrl->rs_control, rs);
+ ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
+ if (ret != 0)
+ printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
+ __func__, info->line, ret);
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
+#endif
+}
+
+static const struct tty_port_operations cyy_port_ops = {
+ .carrier_raised = cyy_carrier_raised,
+ .dtr_rts = cyy_dtr_rts,
+ .shutdown = cy_do_close,
+};
+
+static const struct tty_port_operations cyz_port_ops = {
+ .carrier_raised = cyz_carrier_raised,
+ .dtr_rts = cyz_dtr_rts,
+ .shutdown = cy_do_close,
+};
+
+/*
+ * ---------------------------------------------------------------------
+ * cy_init() and friends
+ *
+ * cy_init() is called at boot-time to initialize the serial driver.
+ * ---------------------------------------------------------------------
+ */
+
+static int __devinit cy_init_card(struct cyclades_card *cinfo)
+{
+ struct cyclades_port *info;
+ unsigned int channel, port;
+
+ spin_lock_init(&cinfo->card_lock);
+ cinfo->intr_enabled = 0;
+
+ cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
+ GFP_KERNEL);
+ if (cinfo->ports == NULL) {
+ printk(KERN_ERR "Cyclades: cannot allocate ports\n");
+ return -ENOMEM;
+ }
+
+ for (channel = 0, port = cinfo->first_line; channel < cinfo->nports;
+ channel++, port++) {
+ info = &cinfo->ports[channel];
+ tty_port_init(&info->port);
+ info->magic = CYCLADES_MAGIC;
+ info->card = cinfo;
+ info->line = port;
+
+ info->port.closing_wait = CLOSING_WAIT_DELAY;
+ info->port.close_delay = 5 * HZ / 10;
+ info->port.flags = STD_COM_FLAGS;
+ init_completion(&info->shutdown_wait);
+
+ if (cy_is_Z(cinfo)) {
+ struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS;
+ struct ZFW_CTRL *zfw_ctrl;
+
+ info->port.ops = &cyz_port_ops;
+ info->type = PORT_STARTECH;
+
+ zfw_ctrl = cinfo->base_addr +
+ (readl(&firm_id->zfwctrl_addr) & 0xfffff);
+ info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel];
+ info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
+
+ if (cinfo->hw_ver == ZO_V1)
+ info->xmit_fifo_size = CYZ_FIFO_SIZE;
+ else
+ info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
+#ifdef CONFIG_CYZ_INTR
+ setup_timer(&cyz_rx_full_timer[port],
+ cyz_rx_restart, (unsigned long)info);
+#endif
+ } else {
+ unsigned short chip_number;
+ int index = cinfo->bus_index;
+
+ info->port.ops = &cyy_port_ops;
+ info->type = PORT_CIRRUS;
+ info->xmit_fifo_size = CyMAX_CHAR_FIFO;
+ info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
+ info->cor2 = CyETC;
+ info->cor3 = 0x08; /* _very_ small rcv threshold */
+
+ chip_number = channel / CyPORTS_PER_CHIP;
+ info->u.cyy.base_addr = cinfo->base_addr +
+ (cy_chip_offset[chip_number] << index);
+ info->chip_rev = cyy_readb(info, CyGFRCR);
+
+ if (info->chip_rev >= CD1400_REV_J) {
+ /* It is a CD1400 rev. J or later */
+ info->tbpr = baud_bpr_60[13]; /* Tx BPR */
+ info->tco = baud_co_60[13]; /* Tx CO */
+ info->rbpr = baud_bpr_60[13]; /* Rx BPR */
+ info->rco = baud_co_60[13]; /* Rx CO */
+ info->rtsdtr_inv = 1;
+ } else {
+ info->tbpr = baud_bpr_25[13]; /* Tx BPR */
+ info->tco = baud_co_25[13]; /* Tx CO */
+ info->rbpr = baud_bpr_25[13]; /* Rx BPR */
+ info->rco = baud_co_25[13]; /* Rx CO */
+ info->rtsdtr_inv = 0;
+ }
+ info->read_status_mask = CyTIMEOUT | CySPECHAR |
+ CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
+ }
+
+ }
+
+#ifndef CONFIG_CYZ_INTR
+ if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
+ mod_timer(&cyz_timerlist, jiffies + 1);
+#ifdef CY_PCI_DEBUG
+ printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
+#endif
+ }
+#endif
+ return 0;
+}
+
+/* initialize chips on Cyclom-Y card -- return number of valid
+ chips (which is number of ports/4) */
+static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
+ int index)
+{
+ unsigned int chip_number;
+ void __iomem *base_addr;
+
+ cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
+ /* Cy_HwReset is 0x1400 */
+ cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
+ /* Cy_ClrIntr is 0x1800 */
+ udelay(500L);
+
+ for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
+ chip_number++) {
+ base_addr =
+ true_base_addr + (cy_chip_offset[chip_number] << index);
+ mdelay(1);
+ if (readb(base_addr + (CyCCR << index)) != 0x00) {
+ /*************
+ printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
+ chip_number, (unsigned long)base_addr);
+ *************/
+ return chip_number;
+ }
+
+ cy_writeb(base_addr + (CyGFRCR << index), 0);
+ udelay(10L);
+
+ /* The Cyclom-16Y does not decode address bit 9 and therefore
+ cannot distinguish between references to chip 0 and a non-
+ existent chip 4. If the preceding clearing of the supposed
+ chip 4 GFRCR register appears at chip 0, there is no chip 4
+ and this must be a Cyclom-16Y, not a Cyclom-32Ye.
+ */
+ if (chip_number == 4 && readb(true_base_addr +
+ (cy_chip_offset[0] << index) +
+ (CyGFRCR << index)) == 0) {
+ return chip_number;
+ }
+
+ cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
+ mdelay(1);
+
+ if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
+ /*
+ printk(" chip #%d at %#6lx is not responding ",
+ chip_number, (unsigned long)base_addr);
+ printk("(GFRCR stayed 0)\n",
+ */
+ return chip_number;
+ }
+ if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
+ 0x40) {
+ /*
+ printk(" chip #%d at %#6lx is not valid (GFRCR == "
+ "%#2x)\n",
+ chip_number, (unsigned long)base_addr,
+ base_addr[CyGFRCR<<index]);
+ */
+ return chip_number;
+ }
+ cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
+ if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
+ /* It is a CD1400 rev. J or later */
+ /* Impossible to reach 5ms with this chip.
+ Changed to 2ms instead (f = 500 Hz). */
+ cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
+ } else {
+ /* f = 200 Hz */
+ cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
+ }
+
+ /*
+ printk(" chip #%d at %#6lx is rev 0x%2x\n",
+ chip_number, (unsigned long)base_addr,
+ readb(base_addr+(CyGFRCR<<index)));
+ */
+ }
+ return chip_number;
+} /* cyy_init_card */
+
+/*
+ * ---------------------------------------------------------------------
+ * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
+ * sets global variables and return the number of ISA boards found.
+ * ---------------------------------------------------------------------
+ */
+static int __init cy_detect_isa(void)
+{
+#ifdef CONFIG_ISA
+ unsigned short cy_isa_irq, nboard;
+ void __iomem *cy_isa_address;
+ unsigned short i, j, cy_isa_nchan;
+ int isparam = 0;
+
+ nboard = 0;
+
+ /* Check for module parameters */
+ for (i = 0; i < NR_CARDS; i++) {
+ if (maddr[i] || i) {
+ isparam = 1;
+ cy_isa_addresses[i] = maddr[i];
+ }
+ if (!maddr[i])
+ break;
+ }
+
+ /* scan the address table probing for Cyclom-Y/ISA boards */
+ for (i = 0; i < NR_ISA_ADDRS; i++) {
+ unsigned int isa_address = cy_isa_addresses[i];
+ if (isa_address == 0x0000)
+ return nboard;
+
+ /* probe for CD1400... */
+ cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
+ if (cy_isa_address == NULL) {
+ printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
+ "address\n");
+ continue;
+ }
+ cy_isa_nchan = CyPORTS_PER_CHIP *
+ cyy_init_card(cy_isa_address, 0);
+ if (cy_isa_nchan == 0) {
+ iounmap(cy_isa_address);
+ continue;
+ }
+
+ if (isparam && i < NR_CARDS && irq[i])
+ cy_isa_irq = irq[i];
+ else
+ /* find out the board's irq by probing */
+ cy_isa_irq = detect_isa_irq(cy_isa_address);
+ if (cy_isa_irq == 0) {
+ printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
+ "IRQ could not be detected.\n",
+ (unsigned long)cy_isa_address);
+ iounmap(cy_isa_address);
+ continue;
+ }
+
+ if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
+ printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
+ "more channels are available. Change NR_PORTS "
+ "in cyclades.c and recompile kernel.\n",
+ (unsigned long)cy_isa_address);
+ iounmap(cy_isa_address);
+ return nboard;
+ }
+ /* fill the next cy_card structure available */
+ for (j = 0; j < NR_CARDS; j++) {
+ if (cy_card[j].base_addr == NULL)
+ break;
+ }
+ if (j == NR_CARDS) { /* no more cy_cards available */
+ printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
+ "more cards can be used. Change NR_CARDS in "
+ "cyclades.c and recompile kernel.\n",
+ (unsigned long)cy_isa_address);
+ iounmap(cy_isa_address);
+ return nboard;
+ }
+
+ /* allocate IRQ */
+ if (request_irq(cy_isa_irq, cyy_interrupt,
+ IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
+ printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
+ "could not allocate IRQ#%d.\n",
+ (unsigned long)cy_isa_address, cy_isa_irq);
+ iounmap(cy_isa_address);
+ return nboard;
+ }
+
+ /* set cy_card */
+ cy_card[j].base_addr = cy_isa_address;
+ cy_card[j].ctl_addr.p9050 = NULL;
+ cy_card[j].irq = (int)cy_isa_irq;
+ cy_card[j].bus_index = 0;
+ cy_card[j].first_line = cy_next_channel;
+ cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
+ cy_card[j].nports = cy_isa_nchan;
+ if (cy_init_card(&cy_card[j])) {
+ cy_card[j].base_addr = NULL;
+ free_irq(cy_isa_irq, &cy_card[j]);
+ iounmap(cy_isa_address);
+ continue;
+ }
+ nboard++;
+
+ printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
+ "%d channels starting from port %d\n",
+ j + 1, (unsigned long)cy_isa_address,
+ (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
+ cy_isa_irq, cy_isa_nchan, cy_next_channel);
+
+ for (j = cy_next_channel;
+ j < cy_next_channel + cy_isa_nchan; j++)
+ tty_register_device(cy_serial_driver, j, NULL);
+ cy_next_channel += cy_isa_nchan;
+ }
+ return nboard;
+#else
+ return 0;
+#endif /* CONFIG_ISA */
+} /* cy_detect_isa */
+
+#ifdef CONFIG_PCI
+static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
+{
+ unsigned int a;
+
+ for (a = 0; a < size && *str; a++, str++)
+ if (*str & 0x80)
+ return -EINVAL;
+
+ for (; a < size; a++, str++)
+ if (*str)
+ return -EINVAL;
+
+ return 0;
+}
+
+static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
+ unsigned int size)
+{
+ for (; size > 0; size--) {
+ cy_writel(fpga, *data++);
+ udelay(10);
+ }
+}
+
+static void __devinit plx_init(struct pci_dev *pdev, int irq,
+ struct RUNTIME_9060 __iomem *addr)
+{
+ /* Reset PLX */
+ cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
+ udelay(100L);
+ cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
+
+ /* Reload Config. Registers from EEPROM */
+ cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
+ udelay(100L);
+ cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
+
+ /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
+ * the IRQ is lost and, thus, we have to re-write it to the PCI config.
+ * registers. This will remain here until we find a permanent fix.
+ */
+ pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
+}
+
+static int __devinit __cyz_load_fw(const struct firmware *fw,
+ const char *name, const u32 mailbox, void __iomem *base,
+ void __iomem *fpga)
+{
+ const void *ptr = fw->data;
+ const struct zfile_header *h = ptr;
+ const struct zfile_config *c, *cs;
+ const struct zfile_block *b, *bs;
+ unsigned int a, tmp, len = fw->size;
+#define BAD_FW KERN_ERR "Bad firmware: "
+ if (len < sizeof(*h)) {
+ printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
+ return -EINVAL;
+ }
+
+ cs = ptr + h->config_offset;
+ bs = ptr + h->block_offset;
+
+ if ((void *)(cs + h->n_config) > ptr + len ||
+ (void *)(bs + h->n_blocks) > ptr + len) {
+ printk(BAD_FW "too short");
+ return -EINVAL;
+ }
+
+ if (cyc_isfwstr(h->name, sizeof(h->name)) ||
+ cyc_isfwstr(h->date, sizeof(h->date))) {
+ printk(BAD_FW "bad formatted header string\n");
+ return -EINVAL;
+ }
+
+ if (strncmp(name, h->name, sizeof(h->name))) {
+ printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
+ return -EINVAL;
+ }
+
+ tmp = 0;
+ for (c = cs; c < cs + h->n_config; c++) {
+ for (a = 0; a < c->n_blocks; a++)
+ if (c->block_list[a] > h->n_blocks) {
+ printk(BAD_FW "bad block ref number in cfgs\n");
+ return -EINVAL;
+ }
+ if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
+ tmp++;
+ }
+ if (!tmp) {
+ printk(BAD_FW "nothing appropriate\n");
+ return -EINVAL;
+ }
+
+ for (b = bs; b < bs + h->n_blocks; b++)
+ if (b->file_offset + b->size > len) {
+ printk(BAD_FW "bad block data offset\n");
+ return -EINVAL;
+ }
+
+ /* everything is OK, let's seek'n'load it */
+ for (c = cs; c < cs + h->n_config; c++)
+ if (c->mailbox == mailbox && c->function == 0)
+ break;
+
+ for (a = 0; a < c->n_blocks; a++) {
+ b = &bs[c->block_list[a]];
+ if (b->type == ZBLOCK_FPGA) {
+ if (fpga != NULL)
+ cyz_fpga_copy(fpga, ptr + b->file_offset,
+ b->size);
+ } else {
+ if (base != NULL)
+ memcpy_toio(base + b->ram_offset,
+ ptr + b->file_offset, b->size);
+ }
+ }
+#undef BAD_FW
+ return 0;
+}
+
+static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
+ struct RUNTIME_9060 __iomem *ctl_addr, int irq)
+{
+ const struct firmware *fw;
+ struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
+ struct CUSTOM_REG __iomem *cust = base_addr;
+ struct ZFW_CTRL __iomem *pt_zfwctrl;
+ void __iomem *tmp;
+ u32 mailbox, status, nchan;
+ unsigned int i;
+ int retval;
+
+ retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
+ if (retval) {
+ dev_err(&pdev->dev, "can't get firmware\n");
+ goto err;
+ }
+
+ /* Check whether the firmware is already loaded and running. If
+ positive, skip this board */
+ if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
+ u32 cntval = readl(base_addr + 0x190);
+
+ udelay(100);
+ if (cntval != readl(base_addr + 0x190)) {
+ /* FW counter is working, FW is running */
+ dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
+ "Skipping board.\n");
+ retval = 0;
+ goto err_rel;
+ }
+ }
+
+ /* start boot */
+ cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
+ ~0x00030800UL);
+
+ mailbox = readl(&ctl_addr->mail_box_0);
+
+ if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
+ /* stops CPU and set window to beginning of RAM */
+ cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
+ cy_writel(&cust->cpu_stop, 0);
+ cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+ udelay(100);
+ }
+
+ plx_init(pdev, irq, ctl_addr);
+
+ if (mailbox != 0) {
+ /* load FPGA */
+ retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
+ base_addr);
+ if (retval)
+ goto err_rel;
+ if (!__cyz_fpga_loaded(ctl_addr)) {
+ dev_err(&pdev->dev, "fw upload successful, but fw is "
+ "not loaded\n");
+ goto err_rel;
+ }
+ }
+
+ /* stops CPU and set window to beginning of RAM */
+ cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
+ cy_writel(&cust->cpu_stop, 0);
+ cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+ udelay(100);
+
+ /* clear memory */
+ for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
+ cy_writeb(tmp, 255);
+ if (mailbox != 0) {
+ /* set window to last 512K of RAM */
+ cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
+ for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
+ cy_writeb(tmp, 255);
+ /* set window to beginning of RAM */
+ cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+ }
+
+ retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
+ release_firmware(fw);
+ if (retval)
+ goto err;
+
+ /* finish boot and start boards */
+ cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
+ cy_writel(&cust->cpu_start, 0);
+ cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+ i = 0;
+ while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
+ msleep(100);
+ if (status != ZFIRM_ID) {
+ if (status == ZFIRM_HLT) {
+ dev_err(&pdev->dev, "you need an external power supply "
+ "for this number of ports. Firmware halted and "
+ "board reset.\n");
+ retval = -EIO;
+ goto err;
+ }
+ dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
+ "some more time\n", status);
+ while ((status = readl(&fid->signature)) != ZFIRM_ID &&
+ i++ < 200)
+ msleep(100);
+ if (status != ZFIRM_ID) {
+ dev_err(&pdev->dev, "Board not started in 20 seconds! "
+ "Giving up. (fid->signature = 0x%x)\n",
+ status);
+ dev_info(&pdev->dev, "*** Warning ***: if you are "
+ "upgrading the FW, please power cycle the "
+ "system before loading the new FW to the "
+ "Cyclades-Z.\n");
+
+ if (__cyz_fpga_loaded(ctl_addr))
+ plx_init(pdev, irq, ctl_addr);
+
+ retval = -EIO;
+ goto err;
+ }
+ dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
+ i / 10);
+ }
+ pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
+
+ dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
+ base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
+ base_addr + readl(&fid->zfwctrl_addr));
+
+ nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
+ dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
+ readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
+
+ if (nchan == 0) {
+ dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
+ "check the connection between the Z host card and the "
+ "serial expanders.\n");
+
+ if (__cyz_fpga_loaded(ctl_addr))
+ plx_init(pdev, irq, ctl_addr);
+
+ dev_info(&pdev->dev, "Null number of ports detected. Board "
+ "reset.\n");
+ retval = 0;
+ goto err;
+ }
+
+ cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
+ cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
+
+ /*
+ Early firmware failed to start looking for commands.
+ This enables firmware interrupts for those commands.
+ */
+ cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
+ (1 << 17));
+ cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
+ 0x00030800UL);
+
+ return nchan;
+err_rel:
+ release_firmware(fw);
+err:
+ return retval;
+}
+
+static int __devinit cy_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ void __iomem *addr0 = NULL, *addr2 = NULL;
+ char *card_name = NULL;
+ u32 uninitialized_var(mailbox);
+ unsigned int device_id, nchan = 0, card_no, i;
+ unsigned char plx_ver;
+ int retval, irq;
+
+ retval = pci_enable_device(pdev);
+ if (retval) {
+ dev_err(&pdev->dev, "cannot enable device\n");
+ goto err;
+ }
+
+ /* read PCI configuration area */
+ irq = pdev->irq;
+ device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
+
+#if defined(__alpha__)
+ if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
+ dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
+ "addresses on Alpha systems.\n");
+ retval = -EIO;
+ goto err_dis;
+ }
+#endif
+ if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
+ dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
+ "addresses\n");
+ retval = -EIO;
+ goto err_dis;
+ }
+
+ if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
+ dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
+ "it...\n");
+ pdev->resource[2].flags &= ~IORESOURCE_IO;
+ }
+
+ retval = pci_request_regions(pdev, "cyclades");
+ if (retval) {
+ dev_err(&pdev->dev, "failed to reserve resources\n");
+ goto err_dis;
+ }
+
+ retval = -EIO;
+ if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
+ device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
+ card_name = "Cyclom-Y";
+
+ addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
+ CyPCI_Yctl);
+ if (addr0 == NULL) {
+ dev_err(&pdev->dev, "can't remap ctl region\n");
+ goto err_reg;
+ }
+ addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
+ CyPCI_Ywin);
+ if (addr2 == NULL) {
+ dev_err(&pdev->dev, "can't remap base region\n");
+ goto err_unmap;
+ }
+
+ nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
+ if (nchan == 0) {
+ dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
+ "Serial-Modules\n");
+ goto err_unmap;
+ }
+ } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
+ struct RUNTIME_9060 __iomem *ctl_addr;
+
+ ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
+ CyPCI_Zctl);
+ if (addr0 == NULL) {
+ dev_err(&pdev->dev, "can't remap ctl region\n");
+ goto err_reg;
+ }
+
+ /* Disable interrupts on the PLX before resetting it */
+ cy_writew(&ctl_addr->intr_ctrl_stat,
+ readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
+
+ plx_init(pdev, irq, addr0);
+
+ mailbox = readl(&ctl_addr->mail_box_0);
+
+ addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
+ mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
+ if (addr2 == NULL) {
+ dev_err(&pdev->dev, "can't remap base region\n");
+ goto err_unmap;
+ }
+
+ if (mailbox == ZE_V1) {
+ card_name = "Cyclades-Ze";
+ } else {
+ card_name = "Cyclades-8Zo";
+#ifdef CY_PCI_DEBUG
+ if (mailbox == ZO_V1) {
+ cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
+ dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
+ "id %lx, ver %lx\n", (ulong)(0xff &
+ readl(&((struct CUSTOM_REG *)addr2)->
+ fpga_id)), (ulong)(0xff &
+ readl(&((struct CUSTOM_REG *)addr2)->
+ fpga_version)));
+ cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+ } else {
+ dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
+ "Cyclades-Z board. FPGA not loaded\n");
+ }
+#endif
+ /* The following clears the firmware id word. This
+ ensures that the driver will not attempt to talk to
+ the board until it has been properly initialized.
+ */
+ if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
+ cy_writel(addr2 + ID_ADDRESS, 0L);
+ }
+
+ retval = cyz_load_fw(pdev, addr2, addr0, irq);
+ if (retval <= 0)
+ goto err_unmap;
+ nchan = retval;
+ }
+
+ if ((cy_next_channel + nchan) > NR_PORTS) {
+ dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
+ "channels are available. Change NR_PORTS in "
+ "cyclades.c and recompile kernel.\n");
+ goto err_unmap;
+ }
+ /* fill the next cy_card structure available */
+ for (card_no = 0; card_no < NR_CARDS; card_no++) {
+ if (cy_card[card_no].base_addr == NULL)
+ break;
+ }
+ if (card_no == NR_CARDS) { /* no more cy_cards available */
+ dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
+ "more cards can be used. Change NR_CARDS in "
+ "cyclades.c and recompile kernel.\n");
+ goto err_unmap;
+ }
+
+ if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
+ device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
+ /* allocate IRQ */
+ retval = request_irq(irq, cyy_interrupt,
+ IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
+ if (retval) {
+ dev_err(&pdev->dev, "could not allocate IRQ\n");
+ goto err_unmap;
+ }
+ cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP;
+ } else {
+ struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS;
+ struct ZFW_CTRL __iomem *zfw_ctrl;
+
+ zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
+
+ cy_card[card_no].hw_ver = mailbox;
+ cy_card[card_no].num_chips = (unsigned int)-1;
+ cy_card[card_no].board_ctrl = &zfw_ctrl->board_ctrl;
+#ifdef CONFIG_CYZ_INTR
+ /* allocate IRQ only if board has an IRQ */
+ if (irq != 0 && irq != 255) {
+ retval = request_irq(irq, cyz_interrupt,
+ IRQF_SHARED, "Cyclades-Z",
+ &cy_card[card_no]);
+ if (retval) {
+ dev_err(&pdev->dev, "could not allocate IRQ\n");
+ goto err_unmap;
+ }
+ }
+#endif /* CONFIG_CYZ_INTR */
+ }
+
+ /* set cy_card */
+ cy_card[card_no].base_addr = addr2;
+ cy_card[card_no].ctl_addr.p9050 = addr0;
+ cy_card[card_no].irq = irq;
+ cy_card[card_no].bus_index = 1;
+ cy_card[card_no].first_line = cy_next_channel;
+ cy_card[card_no].nports = nchan;
+ retval = cy_init_card(&cy_card[card_no]);
+ if (retval)
+ goto err_null;
+
+ pci_set_drvdata(pdev, &cy_card[card_no]);
+
+ if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
+ device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
+ /* enable interrupts in the PCI interface */
+ plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
+ switch (plx_ver) {
+ case PLX_9050:
+ cy_writeb(addr0 + 0x4c, 0x43);
+ break;
+
+ case PLX_9060:
+ case PLX_9080:
+ default: /* Old boards, use PLX_9060 */
+ {
+ struct RUNTIME_9060 __iomem *ctl_addr = addr0;
+ plx_init(pdev, irq, ctl_addr);
+ cy_writew(&ctl_addr->intr_ctrl_stat,
+ readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
+ break;
+ }
+ }
+ }
+
+ dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
+ "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
+ for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
+ tty_register_device(cy_serial_driver, i, &pdev->dev);
+ cy_next_channel += nchan;
+
+ return 0;
+err_null:
+ cy_card[card_no].base_addr = NULL;
+ free_irq(irq, &cy_card[card_no]);
+err_unmap:
+ iounmap(addr0);
+ if (addr2)
+ iounmap(addr2);
+err_reg:
+ pci_release_regions(pdev);
+err_dis:
+ pci_disable_device(pdev);
+err:
+ return retval;
+}
+
+static void __devexit cy_pci_remove(struct pci_dev *pdev)
+{
+ struct cyclades_card *cinfo = pci_get_drvdata(pdev);
+ unsigned int i;
+
+ /* non-Z with old PLX */
+ if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
+ PLX_9050)
+ cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
+ else
+#ifndef CONFIG_CYZ_INTR
+ if (!cy_is_Z(cinfo))
+#endif
+ cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
+ readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
+ ~0x0900);
+
+ iounmap(cinfo->base_addr);
+ if (cinfo->ctl_addr.p9050)
+ iounmap(cinfo->ctl_addr.p9050);
+ if (cinfo->irq
+#ifndef CONFIG_CYZ_INTR
+ && !cy_is_Z(cinfo)
+#endif /* CONFIG_CYZ_INTR */
+ )
+ free_irq(cinfo->irq, cinfo);
+ pci_release_regions(pdev);
+
+ cinfo->base_addr = NULL;
+ for (i = cinfo->first_line; i < cinfo->first_line +
+ cinfo->nports; i++)
+ tty_unregister_device(cy_serial_driver, i);
+ cinfo->nports = 0;
+ kfree(cinfo->ports);
+}
+
+static struct pci_driver cy_pci_driver = {
+ .name = "cyclades",
+ .id_table = cy_pci_dev_id,
+ .probe = cy_pci_probe,
+ .remove = __devexit_p(cy_pci_remove)
+};
+#endif
+
+static int cyclades_proc_show(struct seq_file *m, void *v)
+{
+ struct cyclades_port *info;
+ unsigned int i, j;
+ __u32 cur_jifs = jiffies;
+
+ seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
+ "IdleIn Overruns Ldisc\n");
+
+ /* Output one line for each known port */
+ for (i = 0; i < NR_CARDS; i++)
+ for (j = 0; j < cy_card[i].nports; j++) {
+ info = &cy_card[i].ports[j];
+
+ if (info->port.count) {
+ /* XXX is the ldisc num worth this? */
+ struct tty_struct *tty;
+ struct tty_ldisc *ld;
+ int num = 0;
+ tty = tty_port_tty_get(&info->port);
+ if (tty) {
+ ld = tty_ldisc_ref(tty);
+ if (ld) {
+ num = ld->ops->num;
+ tty_ldisc_deref(ld);
+ }
+ tty_kref_put(tty);
+ }
+ seq_printf(m, "%3d %8lu %10lu %8lu "
+ "%10lu %8lu %9lu %6d\n", info->line,
+ (cur_jifs - info->idle_stats.in_use) /
+ HZ, info->idle_stats.xmit_bytes,
+ (cur_jifs - info->idle_stats.xmit_idle)/
+ HZ, info->idle_stats.recv_bytes,
+ (cur_jifs - info->idle_stats.recv_idle)/
+ HZ, info->idle_stats.overruns,
+ num);
+ } else
+ seq_printf(m, "%3d %8lu %10lu %8lu "
+ "%10lu %8lu %9lu %6ld\n",
+ info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
+ }
+ return 0;
+}
+
+static int cyclades_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, cyclades_proc_show, NULL);
+}
+
+static const struct file_operations cyclades_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = cyclades_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/* The serial driver boot-time initialization code!
+ Hardware I/O ports are mapped to character special devices on a
+ first found, first allocated manner. That is, this code searches
+ for Cyclom cards in the system. As each is found, it is probed
+ to discover how many chips (and thus how many ports) are present.
+ These ports are mapped to the tty ports 32 and upward in monotonic
+ fashion. If an 8-port card is replaced with a 16-port card, the
+ port mapping on a following card will shift.
+
+ This approach is different from what is used in the other serial
+ device driver because the Cyclom is more properly a multiplexer,
+ not just an aggregation of serial ports on one card.
+
+ If there are more cards with more ports than have been
+ statically allocated above, a warning is printed and the
+ extra ports are ignored.
+ */
+
+static const struct tty_operations cy_ops = {
+ .open = cy_open,
+ .close = cy_close,
+ .write = cy_write,
+ .put_char = cy_put_char,
+ .flush_chars = cy_flush_chars,
+ .write_room = cy_write_room,
+ .chars_in_buffer = cy_chars_in_buffer,
+ .flush_buffer = cy_flush_buffer,
+ .ioctl = cy_ioctl,
+ .throttle = cy_throttle,
+ .unthrottle = cy_unthrottle,
+ .set_termios = cy_set_termios,
+ .stop = cy_stop,
+ .start = cy_start,
+ .hangup = cy_hangup,
+ .break_ctl = cy_break,
+ .wait_until_sent = cy_wait_until_sent,
+ .tiocmget = cy_tiocmget,
+ .tiocmset = cy_tiocmset,
+ .get_icount = cy_get_icount,
+ .proc_fops = &cyclades_proc_fops,
+};
+
+static int __init cy_init(void)
+{
+ unsigned int nboards;
+ int retval = -ENOMEM;
+
+ cy_serial_driver = alloc_tty_driver(NR_PORTS);
+ if (!cy_serial_driver)
+ goto err;
+
+ printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
+ __DATE__, __TIME__);
+
+ /* Initialize the tty_driver structure */
+
+ cy_serial_driver->owner = THIS_MODULE;
+ cy_serial_driver->driver_name = "cyclades";
+ cy_serial_driver->name = "ttyC";
+ cy_serial_driver->major = CYCLADES_MAJOR;
+ cy_serial_driver->minor_start = 0;
+ cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
+ cy_serial_driver->init_termios = tty_std_termios;
+ cy_serial_driver->init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+ tty_set_operations(cy_serial_driver, &cy_ops);
+
+ retval = tty_register_driver(cy_serial_driver);
+ if (retval) {
+ printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
+ goto err_frtty;
+ }
+
+ /* the code below is responsible to find the boards. Each different
+ type of board has its own detection routine. If a board is found,
+ the next cy_card structure available is set by the detection
+ routine. These functions are responsible for checking the
+ availability of cy_card and cy_port data structures and updating
+ the cy_next_channel. */
+
+ /* look for isa boards */
+ nboards = cy_detect_isa();
+
+#ifdef CONFIG_PCI
+ /* look for pci boards */
+ retval = pci_register_driver(&cy_pci_driver);
+ if (retval && !nboards) {
+ tty_unregister_driver(cy_serial_driver);
+ goto err_frtty;
+ }
+#endif
+
+ return 0;
+err_frtty:
+ put_tty_driver(cy_serial_driver);
+err:
+ return retval;
+} /* cy_init */
+
+static void __exit cy_cleanup_module(void)
+{
+ struct cyclades_card *card;
+ unsigned int i, e1;
+
+#ifndef CONFIG_CYZ_INTR
+ del_timer_sync(&cyz_timerlist);
+#endif /* CONFIG_CYZ_INTR */
+
+ e1 = tty_unregister_driver(cy_serial_driver);
+ if (e1)
+ printk(KERN_ERR "failed to unregister Cyclades serial "
+ "driver(%d)\n", e1);
+
+#ifdef CONFIG_PCI
+ pci_unregister_driver(&cy_pci_driver);
+#endif
+
+ for (i = 0; i < NR_CARDS; i++) {
+ card = &cy_card[i];
+ if (card->base_addr) {
+ /* clear interrupt */
+ cy_writeb(card->base_addr + Cy_ClrIntr, 0);
+ iounmap(card->base_addr);
+ if (card->ctl_addr.p9050)
+ iounmap(card->ctl_addr.p9050);
+ if (card->irq
+#ifndef CONFIG_CYZ_INTR
+ && !cy_is_Z(card)
+#endif /* CONFIG_CYZ_INTR */
+ )
+ free_irq(card->irq, card);
+ for (e1 = card->first_line; e1 < card->first_line +
+ card->nports; e1++)
+ tty_unregister_device(cy_serial_driver, e1);
+ kfree(card->ports);
+ }
+ }
+
+ put_tty_driver(cy_serial_driver);
+} /* cy_cleanup_module */
+
+module_init(cy_init);
+module_exit(cy_cleanup_module);
+
+MODULE_LICENSE("GPL");
+MODULE_VERSION(CY_VERSION);
+MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
+MODULE_FIRMWARE("cyzfirm.bin");
--- /dev/null
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Original driver code supplied by Multi-Tech
+ *
+ * Changes
+ * 1/9/98 alan@lxorguk.ukuu.org.uk
+ * Merge to 2.0.x kernel tree
+ * Obtain and use official major/minors
+ * Loader switched to a misc device
+ * (fixed range check bug as a side effect)
+ * Printk clean up
+ * 9/12/98 alan@lxorguk.ukuu.org.uk
+ * Rough port to 2.1.x
+ *
+ * 10/6/99 sameer Merged the ISA and PCI drivers to
+ * a new unified driver.
+ *
+ * 3/9/99 sameer Added support for ISI4616 cards.
+ *
+ * 16/9/99 sameer We do not force RTS low anymore.
+ * This is to prevent the firmware
+ * from getting confused.
+ *
+ * 26/10/99 sameer Cosmetic changes:The driver now
+ * dumps the Port Count information
+ * along with I/O address and IRQ.
+ *
+ * 13/12/99 sameer Fixed the problem with IRQ sharing.
+ *
+ * 10/5/00 sameer Fixed isicom_shutdown_board()
+ * to not lower DTR on all the ports
+ * when the last port on the card is
+ * closed.
+ *
+ * 10/5/00 sameer Signal mask setup command added
+ * to isicom_setup_port and
+ * isicom_shutdown_port.
+ *
+ * 24/5/00 sameer The driver is now SMP aware.
+ *
+ *
+ * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
+ *
+ *
+ * 03/01/01 anil .s Added support for resetting the
+ * internal modems on ISI cards.
+ *
+ * 08/02/01 anil .s Upgraded the driver for kernel
+ * 2.4.x
+ *
+ * 11/04/01 Kevin Fixed firmware load problem with
+ * ISIHP-4X card
+ *
+ * 30/04/01 anil .s Fixed the remote login through
+ * ISI port problem. Now the link
+ * does not go down before password
+ * prompt.
+ *
+ * 03/05/01 anil .s Fixed the problem with IRQ sharing
+ * among ISI-PCI cards.
+ *
+ * 03/05/01 anil .s Added support to display the version
+ * info during insmod as well as module
+ * listing by lsmod.
+ *
+ * 10/05/01 anil .s Done the modifications to the source
+ * file and Install script so that the
+ * same installation can be used for
+ * 2.2.x and 2.4.x kernel.
+ *
+ * 06/06/01 anil .s Now we drop both dtr and rts during
+ * shutdown_port as well as raise them
+ * during isicom_config_port.
+ *
+ * 09/06/01 acme@conectiva.com.br use capable, not suser, do
+ * restore_flags on failure in
+ * isicom_send_break, verify put_user
+ * result
+ *
+ * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
+ * Baud index extended to 21
+ *
+ * 20/03/03 ranjeeth Made to work for Linux Advanced server.
+ * Taken care of license warning.
+ *
+ * 10/12/03 Ravindra Made to work for Fedora Core 1 of
+ * Red Hat Distribution
+ *
+ * 06/01/05 Alan Cox Merged the ISI and base kernel strands
+ * into a single 2.6 driver
+ *
+ * ***********************************************************
+ *
+ * To use this driver you also need the support package. You
+ * can find this in RPM format on
+ * ftp://ftp.linux.org.uk/pub/linux/alan
+ *
+ * You can find the original tools for this direct from Multitech
+ * ftp://ftp.multitech.com/ISI-Cards/
+ *
+ * Having installed the cards the module options (/etc/modprobe.conf)
+ *
+ * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
+ *
+ * Omit those entries for boards you don't have installed.
+ *
+ * TODO
+ * Merge testing
+ * 64-bit verification
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/firmware.h>
+#include <linux/kernel.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/termios.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/serial.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <asm/system.h>
+
+#include <linux/pci.h>
+
+#include <linux/isicom.h>
+
+#define InterruptTheCard(base) outw(0, (base) + 0xc)
+#define ClearInterrupt(base) inw((base) + 0x0a)
+
+#ifdef DEBUG
+#define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
+#else
+#define isicom_paranoia_check(a, b, c) 0
+#endif
+
+static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
+static void __devexit isicom_remove(struct pci_dev *);
+
+static struct pci_device_id isicom_pci_tbl[] = {
+ { PCI_DEVICE(VENDOR_ID, 0x2028) },
+ { PCI_DEVICE(VENDOR_ID, 0x2051) },
+ { PCI_DEVICE(VENDOR_ID, 0x2052) },
+ { PCI_DEVICE(VENDOR_ID, 0x2053) },
+ { PCI_DEVICE(VENDOR_ID, 0x2054) },
+ { PCI_DEVICE(VENDOR_ID, 0x2055) },
+ { PCI_DEVICE(VENDOR_ID, 0x2056) },
+ { PCI_DEVICE(VENDOR_ID, 0x2057) },
+ { PCI_DEVICE(VENDOR_ID, 0x2058) },
+ { 0 }
+};
+MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
+
+static struct pci_driver isicom_driver = {
+ .name = "isicom",
+ .id_table = isicom_pci_tbl,
+ .probe = isicom_probe,
+ .remove = __devexit_p(isicom_remove)
+};
+
+static int prev_card = 3; /* start servicing isi_card[0] */
+static struct tty_driver *isicom_normal;
+
+static void isicom_tx(unsigned long _data);
+static void isicom_start(struct tty_struct *tty);
+
+static DEFINE_TIMER(tx, isicom_tx, 0, 0);
+
+/* baud index mappings from linux defns to isi */
+
+static signed char linuxb_to_isib[] = {
+ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
+};
+
+struct isi_board {
+ unsigned long base;
+ int irq;
+ unsigned char port_count;
+ unsigned short status;
+ unsigned short port_status; /* each bit for each port */
+ unsigned short shift_count;
+ struct isi_port *ports;
+ signed char count;
+ spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
+ unsigned long flags;
+ unsigned int index;
+};
+
+struct isi_port {
+ unsigned short magic;
+ struct tty_port port;
+ u16 channel;
+ u16 status;
+ struct isi_board *card;
+ unsigned char *xmit_buf;
+ int xmit_head;
+ int xmit_tail;
+ int xmit_cnt;
+};
+
+static struct isi_board isi_card[BOARD_COUNT];
+static struct isi_port isi_ports[PORT_COUNT];
+
+/*
+ * Locking functions for card level locking. We need to own both
+ * the kernel lock for the card and have the card in a position that
+ * it wants to talk.
+ */
+
+static inline int WaitTillCardIsFree(unsigned long base)
+{
+ unsigned int count = 0;
+ unsigned int a = in_atomic(); /* do we run under spinlock? */
+
+ while (!(inw(base + 0xe) & 0x1) && count++ < 100)
+ if (a)
+ mdelay(1);
+ else
+ msleep(1);
+
+ return !(inw(base + 0xe) & 0x1);
+}
+
+static int lock_card(struct isi_board *card)
+{
+ unsigned long base = card->base;
+ unsigned int retries, a;
+
+ for (retries = 0; retries < 10; retries++) {
+ spin_lock_irqsave(&card->card_lock, card->flags);
+ for (a = 0; a < 10; a++) {
+ if (inw(base + 0xe) & 0x1)
+ return 1;
+ udelay(10);
+ }
+ spin_unlock_irqrestore(&card->card_lock, card->flags);
+ msleep(10);
+ }
+ pr_warning("Failed to lock Card (0x%lx)\n", card->base);
+
+ return 0; /* Failed to acquire the card! */
+}
+
+static void unlock_card(struct isi_board *card)
+{
+ spin_unlock_irqrestore(&card->card_lock, card->flags);
+}
+
+/*
+ * ISI Card specific ops ...
+ */
+
+/* card->lock HAS to be held */
+static void raise_dtr(struct isi_port *port)
+{
+ struct isi_board *card = port->card;
+ unsigned long base = card->base;
+ u16 channel = port->channel;
+
+ if (WaitTillCardIsFree(base))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0504, base);
+ InterruptTheCard(base);
+ port->status |= ISI_DTR;
+}
+
+/* card->lock HAS to be held */
+static inline void drop_dtr(struct isi_port *port)
+{
+ struct isi_board *card = port->card;
+ unsigned long base = card->base;
+ u16 channel = port->channel;
+
+ if (WaitTillCardIsFree(base))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0404, base);
+ InterruptTheCard(base);
+ port->status &= ~ISI_DTR;
+}
+
+/* card->lock HAS to be held */
+static inline void raise_rts(struct isi_port *port)
+{
+ struct isi_board *card = port->card;
+ unsigned long base = card->base;
+ u16 channel = port->channel;
+
+ if (WaitTillCardIsFree(base))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0a04, base);
+ InterruptTheCard(base);
+ port->status |= ISI_RTS;
+}
+
+/* card->lock HAS to be held */
+static inline void drop_rts(struct isi_port *port)
+{
+ struct isi_board *card = port->card;
+ unsigned long base = card->base;
+ u16 channel = port->channel;
+
+ if (WaitTillCardIsFree(base))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0804, base);
+ InterruptTheCard(base);
+ port->status &= ~ISI_RTS;
+}
+
+/* card->lock MUST NOT be held */
+
+static void isicom_dtr_rts(struct tty_port *port, int on)
+{
+ struct isi_port *ip = container_of(port, struct isi_port, port);
+ struct isi_board *card = ip->card;
+ unsigned long base = card->base;
+ u16 channel = ip->channel;
+
+ if (!lock_card(card))
+ return;
+
+ if (on) {
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0f04, base);
+ InterruptTheCard(base);
+ ip->status |= (ISI_DTR | ISI_RTS);
+ } else {
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0C04, base);
+ InterruptTheCard(base);
+ ip->status &= ~(ISI_DTR | ISI_RTS);
+ }
+ unlock_card(card);
+}
+
+/* card->lock HAS to be held */
+static void drop_dtr_rts(struct isi_port *port)
+{
+ struct isi_board *card = port->card;
+ unsigned long base = card->base;
+ u16 channel = port->channel;
+
+ if (WaitTillCardIsFree(base))
+ return;
+
+ outw(0x8000 | (channel << card->shift_count) | 0x02, base);
+ outw(0x0c04, base);
+ InterruptTheCard(base);
+ port->status &= ~(ISI_RTS | ISI_DTR);
+}
+
+/*
+ * ISICOM Driver specific routines ...
+ *
+ */
+
+static inline int __isicom_paranoia_check(struct isi_port const *port,
+ char *name, const char *routine)
+{
+ if (!port) {
+ pr_warning("Warning: bad isicom magic for dev %s in %s.\n",
+ name, routine);
+ return 1;
+ }
+ if (port->magic != ISICOM_MAGIC) {
+ pr_warning("Warning: NULL isicom port for dev %s in %s.\n",
+ name, routine);
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * Transmitter.
+ *
+ * We shovel data into the card buffers on a regular basis. The card
+ * will do the rest of the work for us.
+ */
+
+static void isicom_tx(unsigned long _data)
+{
+ unsigned long flags, base;
+ unsigned int retries;
+ short count = (BOARD_COUNT-1), card;
+ short txcount, wrd, residue, word_count, cnt;
+ struct isi_port *port;
+ struct tty_struct *tty;
+
+ /* find next active board */
+ card = (prev_card + 1) & 0x0003;
+ while (count-- > 0) {
+ if (isi_card[card].status & BOARD_ACTIVE)
+ break;
+ card = (card + 1) & 0x0003;
+ }
+ if (!(isi_card[card].status & BOARD_ACTIVE))
+ goto sched_again;
+
+ prev_card = card;
+
+ count = isi_card[card].port_count;
+ port = isi_card[card].ports;
+ base = isi_card[card].base;
+
+ spin_lock_irqsave(&isi_card[card].card_lock, flags);
+ for (retries = 0; retries < 100; retries++) {
+ if (inw(base + 0xe) & 0x1)
+ break;
+ udelay(2);
+ }
+ if (retries >= 100)
+ goto unlock;
+
+ tty = tty_port_tty_get(&port->port);
+ if (tty == NULL)
+ goto put_unlock;
+
+ for (; count > 0; count--, port++) {
+ /* port not active or tx disabled to force flow control */
+ if (!(port->port.flags & ASYNC_INITIALIZED) ||
+ !(port->status & ISI_TXOK))
+ continue;
+
+ txcount = min_t(short, TX_SIZE, port->xmit_cnt);
+ if (txcount <= 0 || tty->stopped || tty->hw_stopped)
+ continue;
+
+ if (!(inw(base + 0x02) & (1 << port->channel)))
+ continue;
+
+ pr_debug("txing %d bytes, port%d.\n",
+ txcount, port->channel + 1);
+ outw((port->channel << isi_card[card].shift_count) | txcount,
+ base);
+ residue = NO;
+ wrd = 0;
+ while (1) {
+ cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
+ - port->xmit_tail));
+ if (residue == YES) {
+ residue = NO;
+ if (cnt > 0) {
+ wrd |= (port->port.xmit_buf[port->xmit_tail]
+ << 8);
+ port->xmit_tail = (port->xmit_tail + 1)
+ & (SERIAL_XMIT_SIZE - 1);
+ port->xmit_cnt--;
+ txcount--;
+ cnt--;
+ outw(wrd, base);
+ } else {
+ outw(wrd, base);
+ break;
+ }
+ }
+ if (cnt <= 0)
+ break;
+ word_count = cnt >> 1;
+ outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
+ port->xmit_tail = (port->xmit_tail
+ + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
+ txcount -= (word_count << 1);
+ port->xmit_cnt -= (word_count << 1);
+ if (cnt & 0x0001) {
+ residue = YES;
+ wrd = port->port.xmit_buf[port->xmit_tail];
+ port->xmit_tail = (port->xmit_tail + 1)
+ & (SERIAL_XMIT_SIZE - 1);
+ port->xmit_cnt--;
+ txcount--;
+ }
+ }
+
+ InterruptTheCard(base);
+ if (port->xmit_cnt <= 0)
+ port->status &= ~ISI_TXOK;
+ if (port->xmit_cnt <= WAKEUP_CHARS)
+ tty_wakeup(tty);
+ }
+
+put_unlock:
+ tty_kref_put(tty);
+unlock:
+ spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
+ /* schedule another tx for hopefully in about 10ms */
+sched_again:
+ mod_timer(&tx, jiffies + msecs_to_jiffies(10));
+}
+
+/*
+ * Main interrupt handler routine
+ */
+
+static irqreturn_t isicom_interrupt(int irq, void *dev_id)
+{
+ struct isi_board *card = dev_id;
+ struct isi_port *port;
+ struct tty_struct *tty;
+ unsigned long base;
+ u16 header, word_count, count, channel;
+ short byte_count;
+ unsigned char *rp;
+
+ if (!card || !(card->status & FIRMWARE_LOADED))
+ return IRQ_NONE;
+
+ base = card->base;
+
+ /* did the card interrupt us? */
+ if (!(inw(base + 0x0e) & 0x02))
+ return IRQ_NONE;
+
+ spin_lock(&card->card_lock);
+
+ /*
+ * disable any interrupts from the PCI card and lower the
+ * interrupt line
+ */
+ outw(0x8000, base+0x04);
+ ClearInterrupt(base);
+
+ inw(base); /* get the dummy word out */
+ header = inw(base);
+ channel = (header & 0x7800) >> card->shift_count;
+ byte_count = header & 0xff;
+
+ if (channel + 1 > card->port_count) {
+ pr_warning("%s(0x%lx): %d(channel) > port_count.\n",
+ __func__, base, channel+1);
+ outw(0x0000, base+0x04); /* enable interrupts */
+ spin_unlock(&card->card_lock);
+ return IRQ_HANDLED;
+ }
+ port = card->ports + channel;
+ if (!(port->port.flags & ASYNC_INITIALIZED)) {
+ outw(0x0000, base+0x04); /* enable interrupts */
+ spin_unlock(&card->card_lock);
+ return IRQ_HANDLED;
+ }
+
+ tty = tty_port_tty_get(&port->port);
+ if (tty == NULL) {
+ word_count = byte_count >> 1;
+ while (byte_count > 1) {
+ inw(base);
+ byte_count -= 2;
+ }
+ if (byte_count & 0x01)
+ inw(base);
+ outw(0x0000, base+0x04); /* enable interrupts */
+ spin_unlock(&card->card_lock);
+ return IRQ_HANDLED;
+ }
+
+ if (header & 0x8000) { /* Status Packet */
+ header = inw(base);
+ switch (header & 0xff) {
+ case 0: /* Change in EIA signals */
+ if (port->port.flags & ASYNC_CHECK_CD) {
+ if (port->status & ISI_DCD) {
+ if (!(header & ISI_DCD)) {
+ /* Carrier has been lost */
+ pr_debug("%s: DCD->low.\n",
+ __func__);
+ port->status &= ~ISI_DCD;
+ tty_hangup(tty);
+ }
+ } else if (header & ISI_DCD) {
+ /* Carrier has been detected */
+ pr_debug("%s: DCD->high.\n",
+ __func__);
+ port->status |= ISI_DCD;
+ wake_up_interruptible(&port->port.open_wait);
+ }
+ } else {
+ if (header & ISI_DCD)
+ port->status |= ISI_DCD;
+ else
+ port->status &= ~ISI_DCD;
+ }
+
+ if (port->port.flags & ASYNC_CTS_FLOW) {
+ if (tty->hw_stopped) {
+ if (header & ISI_CTS) {
+ port->port.tty->hw_stopped = 0;
+ /* start tx ing */
+ port->status |= (ISI_TXOK
+ | ISI_CTS);
+ tty_wakeup(tty);
+ }
+ } else if (!(header & ISI_CTS)) {
+ tty->hw_stopped = 1;
+ /* stop tx ing */
+ port->status &= ~(ISI_TXOK | ISI_CTS);
+ }
+ } else {
+ if (header & ISI_CTS)
+ port->status |= ISI_CTS;
+ else
+ port->status &= ~ISI_CTS;
+ }
+
+ if (header & ISI_DSR)
+ port->status |= ISI_DSR;
+ else
+ port->status &= ~ISI_DSR;
+
+ if (header & ISI_RI)
+ port->status |= ISI_RI;
+ else
+ port->status &= ~ISI_RI;
+
+ break;
+
+ case 1: /* Received Break !!! */
+ tty_insert_flip_char(tty, 0, TTY_BREAK);
+ if (port->port.flags & ASYNC_SAK)
+ do_SAK(tty);
+ tty_flip_buffer_push(tty);
+ break;
+
+ case 2: /* Statistics */
+ pr_debug("%s: stats!!!\n", __func__);
+ break;
+
+ default:
+ pr_debug("%s: Unknown code in status packet.\n",
+ __func__);
+ break;
+ }
+ } else { /* Data Packet */
+
+ count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
+ pr_debug("%s: Can rx %d of %d bytes.\n",
+ __func__, count, byte_count);
+ word_count = count >> 1;
+ insw(base, rp, word_count);
+ byte_count -= (word_count << 1);
+ if (count & 0x0001) {
+ tty_insert_flip_char(tty, inw(base) & 0xff,
+ TTY_NORMAL);
+ byte_count -= 2;
+ }
+ if (byte_count > 0) {
+ pr_debug("%s(0x%lx:%d): Flip buffer overflow! dropping bytes...\n",
+ __func__, base, channel + 1);
+ /* drain out unread xtra data */
+ while (byte_count > 0) {
+ inw(base);
+ byte_count -= 2;
+ }
+ }
+ tty_flip_buffer_push(tty);
+ }
+ outw(0x0000, base+0x04); /* enable interrupts */
+ spin_unlock(&card->card_lock);
+ tty_kref_put(tty);
+
+ return IRQ_HANDLED;
+}
+
+static void isicom_config_port(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+ unsigned long baud;
+ unsigned long base = card->base;
+ u16 channel_setup, channel = port->channel,
+ shift_count = card->shift_count;
+ unsigned char flow_ctrl;
+
+ /* FIXME: Switch to new tty baud API */
+ baud = C_BAUD(tty);
+ if (baud & CBAUDEX) {
+ baud &= ~CBAUDEX;
+
+ /* if CBAUDEX bit is on and the baud is set to either 50 or 75
+ * then the card is programmed for 57.6Kbps or 115Kbps
+ * respectively.
+ */
+
+ /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
+ if (baud < 1 || baud > 4)
+ tty->termios->c_cflag &= ~CBAUDEX;
+ else
+ baud += 15;
+ }
+ if (baud == 15) {
+
+ /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
+ * by the set_serial_info ioctl ... this is done by
+ * the 'setserial' utility.
+ */
+
+ if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ baud++; /* 57.6 Kbps */
+ if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ baud += 2; /* 115 Kbps */
+ if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+ baud += 3; /* 230 kbps*/
+ if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+ baud += 4; /* 460 kbps*/
+ }
+ if (linuxb_to_isib[baud] == -1) {
+ /* hang up */
+ drop_dtr(port);
+ return;
+ } else
+ raise_dtr(port);
+
+ if (WaitTillCardIsFree(base) == 0) {
+ outw(0x8000 | (channel << shift_count) | 0x03, base);
+ outw(linuxb_to_isib[baud] << 8 | 0x03, base);
+ channel_setup = 0;
+ switch (C_CSIZE(tty)) {
+ case CS5:
+ channel_setup |= ISICOM_CS5;
+ break;
+ case CS6:
+ channel_setup |= ISICOM_CS6;
+ break;
+ case CS7:
+ channel_setup |= ISICOM_CS7;
+ break;
+ case CS8:
+ channel_setup |= ISICOM_CS8;
+ break;
+ }
+
+ if (C_CSTOPB(tty))
+ channel_setup |= ISICOM_2SB;
+ if (C_PARENB(tty)) {
+ channel_setup |= ISICOM_EVPAR;
+ if (C_PARODD(tty))
+ channel_setup |= ISICOM_ODPAR;
+ }
+ outw(channel_setup, base);
+ InterruptTheCard(base);
+ }
+ if (C_CLOCAL(tty))
+ port->port.flags &= ~ASYNC_CHECK_CD;
+ else
+ port->port.flags |= ASYNC_CHECK_CD;
+
+ /* flow control settings ...*/
+ flow_ctrl = 0;
+ port->port.flags &= ~ASYNC_CTS_FLOW;
+ if (C_CRTSCTS(tty)) {
+ port->port.flags |= ASYNC_CTS_FLOW;
+ flow_ctrl |= ISICOM_CTSRTS;
+ }
+ if (I_IXON(tty))
+ flow_ctrl |= ISICOM_RESPOND_XONXOFF;
+ if (I_IXOFF(tty))
+ flow_ctrl |= ISICOM_INITIATE_XONXOFF;
+
+ if (WaitTillCardIsFree(base) == 0) {
+ outw(0x8000 | (channel << shift_count) | 0x04, base);
+ outw(flow_ctrl << 8 | 0x05, base);
+ outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
+ InterruptTheCard(base);
+ }
+
+ /* rx enabled -> enable port for rx on the card */
+ if (C_CREAD(tty)) {
+ card->port_status |= (1 << channel);
+ outw(card->port_status, base + 0x02);
+ }
+}
+
+/* open et all */
+
+static inline void isicom_setup_board(struct isi_board *bp)
+{
+ int channel;
+ struct isi_port *port;
+
+ bp->count++;
+ if (!(bp->status & BOARD_INIT)) {
+ port = bp->ports;
+ for (channel = 0; channel < bp->port_count; channel++, port++)
+ drop_dtr_rts(port);
+ }
+ bp->status |= BOARD_ACTIVE | BOARD_INIT;
+}
+
+/* Activate and thus setup board are protected from races against shutdown
+ by the tty_port mutex */
+
+static int isicom_activate(struct tty_port *tport, struct tty_struct *tty)
+{
+ struct isi_port *port = container_of(tport, struct isi_port, port);
+ struct isi_board *card = port->card;
+ unsigned long flags;
+
+ if (tty_port_alloc_xmit_buf(tport) < 0)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ isicom_setup_board(card);
+
+ port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+
+ /* discard any residual data */
+ if (WaitTillCardIsFree(card->base) == 0) {
+ outw(0x8000 | (port->channel << card->shift_count) | 0x02,
+ card->base);
+ outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
+ InterruptTheCard(card->base);
+ }
+ isicom_config_port(tty);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ return 0;
+}
+
+static int isicom_carrier_raised(struct tty_port *port)
+{
+ struct isi_port *ip = container_of(port, struct isi_port, port);
+ return (ip->status & ISI_DCD)?1 : 0;
+}
+
+static struct tty_port *isicom_find_port(struct tty_struct *tty)
+{
+ struct isi_port *port;
+ struct isi_board *card;
+ unsigned int board;
+ int line = tty->index;
+
+ if (line < 0 || line > PORT_COUNT-1)
+ return NULL;
+ board = BOARD(line);
+ card = &isi_card[board];
+
+ if (!(card->status & FIRMWARE_LOADED))
+ return NULL;
+
+ /* open on a port greater than the port count for the card !!! */
+ if (line > ((board * 16) + card->port_count - 1))
+ return NULL;
+
+ port = &isi_ports[line];
+ if (isicom_paranoia_check(port, tty->name, "isicom_open"))
+ return NULL;
+
+ return &port->port;
+}
+
+static int isicom_open(struct tty_struct *tty, struct file *filp)
+{
+ struct isi_port *port;
+ struct tty_port *tport;
+
+ tport = isicom_find_port(tty);
+ if (tport == NULL)
+ return -ENODEV;
+ port = container_of(tport, struct isi_port, port);
+
+ tty->driver_data = port;
+ return tty_port_open(tport, tty, filp);
+}
+
+/* close et all */
+
+/* card->lock HAS to be held */
+static void isicom_shutdown_port(struct isi_port *port)
+{
+ struct isi_board *card = port->card;
+
+ if (--card->count < 0) {
+ pr_debug("%s: bad board(0x%lx) count %d.\n",
+ __func__, card->base, card->count);
+ card->count = 0;
+ }
+ /* last port was closed, shutdown that board too */
+ if (!card->count)
+ card->status &= BOARD_ACTIVE;
+}
+
+static void isicom_flush_buffer(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+ unsigned long flags;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
+ return;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ tty_wakeup(tty);
+}
+
+static void isicom_shutdown(struct tty_port *port)
+{
+ struct isi_port *ip = container_of(port, struct isi_port, port);
+ struct isi_board *card = ip->card;
+ unsigned long flags;
+
+ /* indicate to the card that no more data can be received
+ on this port */
+ spin_lock_irqsave(&card->card_lock, flags);
+ card->port_status &= ~(1 << ip->channel);
+ outw(card->port_status, card->base + 0x02);
+ isicom_shutdown_port(ip);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ tty_port_free_xmit_buf(port);
+}
+
+static void isicom_close(struct tty_struct *tty, struct file *filp)
+{
+ struct isi_port *ip = tty->driver_data;
+ struct tty_port *port;
+
+ if (ip == NULL)
+ return;
+
+ port = &ip->port;
+ if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
+ return;
+ tty_port_close(port, tty, filp);
+}
+
+/* write et all */
+static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
+ int count)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+ unsigned long flags;
+ int cnt, total = 0;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_write"))
+ return 0;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ while (1) {
+ cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
+ - 1, SERIAL_XMIT_SIZE - port->xmit_head));
+ if (cnt <= 0)
+ break;
+
+ memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
+ port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
+ - 1);
+ port->xmit_cnt += cnt;
+ buf += cnt;
+ count -= cnt;
+ total += cnt;
+ }
+ if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
+ port->status |= ISI_TXOK;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ return total;
+}
+
+/* put_char et all */
+static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+ unsigned long flags;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
+ return 0;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ return 0;
+ }
+
+ port->port.xmit_buf[port->xmit_head++] = ch;
+ port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
+ port->xmit_cnt++;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ return 1;
+}
+
+/* flush_chars et all */
+static void isicom_flush_chars(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
+ return;
+
+ if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
+ !port->port.xmit_buf)
+ return;
+
+ /* this tells the transmitter to consider this port for
+ data output to the card ... that's the best we can do. */
+ port->status |= ISI_TXOK;
+}
+
+/* write_room et all */
+static int isicom_write_room(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ int free;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
+ return 0;
+
+ free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
+ if (free < 0)
+ free = 0;
+ return free;
+}
+
+/* chars_in_buffer et all */
+static int isicom_chars_in_buffer(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
+ return 0;
+ return port->xmit_cnt;
+}
+
+/* ioctl et all */
+static int isicom_send_break(struct tty_struct *tty, int length)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+ unsigned long base = card->base;
+
+ if (length == -1)
+ return -EOPNOTSUPP;
+
+ if (!lock_card(card))
+ return -EINVAL;
+
+ outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
+ outw((length & 0xff) << 8 | 0x00, base);
+ outw((length & 0xff00), base);
+ InterruptTheCard(base);
+
+ unlock_card(card);
+ return 0;
+}
+
+static int isicom_tiocmget(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ /* just send the port status */
+ u16 status = port->status;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
+ return -ENODEV;
+
+ return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
+ ((status & ISI_DTR) ? TIOCM_DTR : 0) |
+ ((status & ISI_DCD) ? TIOCM_CAR : 0) |
+ ((status & ISI_DSR) ? TIOCM_DSR : 0) |
+ ((status & ISI_CTS) ? TIOCM_CTS : 0) |
+ ((status & ISI_RI ) ? TIOCM_RI : 0);
+}
+
+static int isicom_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct isi_port *port = tty->driver_data;
+ unsigned long flags;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
+ return -ENODEV;
+
+ spin_lock_irqsave(&port->card->card_lock, flags);
+ if (set & TIOCM_RTS)
+ raise_rts(port);
+ if (set & TIOCM_DTR)
+ raise_dtr(port);
+
+ if (clear & TIOCM_RTS)
+ drop_rts(port);
+ if (clear & TIOCM_DTR)
+ drop_dtr(port);
+ spin_unlock_irqrestore(&port->card->card_lock, flags);
+
+ return 0;
+}
+
+static int isicom_set_serial_info(struct tty_struct *tty,
+ struct serial_struct __user *info)
+{
+ struct isi_port *port = tty->driver_data;
+ struct serial_struct newinfo;
+ int reconfig_port;
+
+ if (copy_from_user(&newinfo, info, sizeof(newinfo)))
+ return -EFAULT;
+
+ mutex_lock(&port->port.mutex);
+ reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
+ (newinfo.flags & ASYNC_SPD_MASK));
+
+ if (!capable(CAP_SYS_ADMIN)) {
+ if ((newinfo.close_delay != port->port.close_delay) ||
+ (newinfo.closing_wait != port->port.closing_wait) ||
+ ((newinfo.flags & ~ASYNC_USR_MASK) !=
+ (port->port.flags & ~ASYNC_USR_MASK))) {
+ mutex_unlock(&port->port.mutex);
+ return -EPERM;
+ }
+ port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
+ (newinfo.flags & ASYNC_USR_MASK));
+ } else {
+ port->port.close_delay = newinfo.close_delay;
+ port->port.closing_wait = newinfo.closing_wait;
+ port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
+ (newinfo.flags & ASYNC_FLAGS));
+ }
+ if (reconfig_port) {
+ unsigned long flags;
+ spin_lock_irqsave(&port->card->card_lock, flags);
+ isicom_config_port(tty);
+ spin_unlock_irqrestore(&port->card->card_lock, flags);
+ }
+ mutex_unlock(&port->port.mutex);
+ return 0;
+}
+
+static int isicom_get_serial_info(struct isi_port *port,
+ struct serial_struct __user *info)
+{
+ struct serial_struct out_info;
+
+ mutex_lock(&port->port.mutex);
+ memset(&out_info, 0, sizeof(out_info));
+/* out_info.type = ? */
+ out_info.line = port - isi_ports;
+ out_info.port = port->card->base;
+ out_info.irq = port->card->irq;
+ out_info.flags = port->port.flags;
+/* out_info.baud_base = ? */
+ out_info.close_delay = port->port.close_delay;
+ out_info.closing_wait = port->port.closing_wait;
+ mutex_unlock(&port->port.mutex);
+ if (copy_to_user(info, &out_info, sizeof(out_info)))
+ return -EFAULT;
+ return 0;
+}
+
+static int isicom_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct isi_port *port = tty->driver_data;
+ void __user *argp = (void __user *)arg;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
+ return -ENODEV;
+
+ switch (cmd) {
+ case TIOCGSERIAL:
+ return isicom_get_serial_info(port, argp);
+
+ case TIOCSSERIAL:
+ return isicom_set_serial_info(tty, argp);
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+/* set_termios et all */
+static void isicom_set_termios(struct tty_struct *tty,
+ struct ktermios *old_termios)
+{
+ struct isi_port *port = tty->driver_data;
+ unsigned long flags;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
+ return;
+
+ if (tty->termios->c_cflag == old_termios->c_cflag &&
+ tty->termios->c_iflag == old_termios->c_iflag)
+ return;
+
+ spin_lock_irqsave(&port->card->card_lock, flags);
+ isicom_config_port(tty);
+ spin_unlock_irqrestore(&port->card->card_lock, flags);
+
+ if ((old_termios->c_cflag & CRTSCTS) &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ isicom_start(tty);
+ }
+}
+
+/* throttle et all */
+static void isicom_throttle(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
+ return;
+
+ /* tell the card that this port cannot handle any more data for now */
+ card->port_status &= ~(1 << port->channel);
+ outw(card->port_status, card->base + 0x02);
+}
+
+/* unthrottle et all */
+static void isicom_unthrottle(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+ struct isi_board *card = port->card;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
+ return;
+
+ /* tell the card that this port is ready to accept more data */
+ card->port_status |= (1 << port->channel);
+ outw(card->port_status, card->base + 0x02);
+}
+
+/* stop et all */
+static void isicom_stop(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
+ return;
+
+ /* this tells the transmitter not to consider this port for
+ data output to the card. */
+ port->status &= ~ISI_TXOK;
+}
+
+/* start et all */
+static void isicom_start(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_start"))
+ return;
+
+ /* this tells the transmitter to consider this port for
+ data output to the card. */
+ port->status |= ISI_TXOK;
+}
+
+static void isicom_hangup(struct tty_struct *tty)
+{
+ struct isi_port *port = tty->driver_data;
+
+ if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
+ return;
+ tty_port_hangup(&port->port);
+}
+
+
+/*
+ * Driver init and deinit functions
+ */
+
+static const struct tty_operations isicom_ops = {
+ .open = isicom_open,
+ .close = isicom_close,
+ .write = isicom_write,
+ .put_char = isicom_put_char,
+ .flush_chars = isicom_flush_chars,
+ .write_room = isicom_write_room,
+ .chars_in_buffer = isicom_chars_in_buffer,
+ .ioctl = isicom_ioctl,
+ .set_termios = isicom_set_termios,
+ .throttle = isicom_throttle,
+ .unthrottle = isicom_unthrottle,
+ .stop = isicom_stop,
+ .start = isicom_start,
+ .hangup = isicom_hangup,
+ .flush_buffer = isicom_flush_buffer,
+ .tiocmget = isicom_tiocmget,
+ .tiocmset = isicom_tiocmset,
+ .break_ctl = isicom_send_break,
+};
+
+static const struct tty_port_operations isicom_port_ops = {
+ .carrier_raised = isicom_carrier_raised,
+ .dtr_rts = isicom_dtr_rts,
+ .activate = isicom_activate,
+ .shutdown = isicom_shutdown,
+};
+
+static int __devinit reset_card(struct pci_dev *pdev,
+ const unsigned int card, unsigned int *signature)
+{
+ struct isi_board *board = pci_get_drvdata(pdev);
+ unsigned long base = board->base;
+ unsigned int sig, portcount = 0;
+ int retval = 0;
+
+ dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
+ base);
+
+ inw(base + 0x8);
+
+ msleep(10);
+
+ outw(0, base + 0x8); /* Reset */
+
+ msleep(1000);
+
+ sig = inw(base + 0x4) & 0xff;
+
+ if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
+ sig != 0xee) {
+ dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
+ "bad I/O Port Address 0x%lx).\n", card + 1, base);
+ dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
+ retval = -EIO;
+ goto end;
+ }
+
+ msleep(10);
+
+ portcount = inw(base + 0x2);
+ if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
+ portcount != 8 && portcount != 16)) {
+ dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
+ card + 1);
+ retval = -EIO;
+ goto end;
+ }
+
+ switch (sig) {
+ case 0xa5:
+ case 0xbb:
+ case 0xdd:
+ board->port_count = (portcount == 4) ? 4 : 8;
+ board->shift_count = 12;
+ break;
+ case 0xcc:
+ case 0xee:
+ board->port_count = 16;
+ board->shift_count = 11;
+ break;
+ }
+ dev_info(&pdev->dev, "-Done\n");
+ *signature = sig;
+
+end:
+ return retval;
+}
+
+static int __devinit load_firmware(struct pci_dev *pdev,
+ const unsigned int index, const unsigned int signature)
+{
+ struct isi_board *board = pci_get_drvdata(pdev);
+ const struct firmware *fw;
+ unsigned long base = board->base;
+ unsigned int a;
+ u16 word_count, status;
+ int retval = -EIO;
+ char *name;
+ u8 *data;
+
+ struct stframe {
+ u16 addr;
+ u16 count;
+ u8 data[0];
+ } *frame;
+
+ switch (signature) {
+ case 0xa5:
+ name = "isi608.bin";
+ break;
+ case 0xbb:
+ name = "isi608em.bin";
+ break;
+ case 0xcc:
+ name = "isi616em.bin";
+ break;
+ case 0xdd:
+ name = "isi4608.bin";
+ break;
+ case 0xee:
+ name = "isi4616.bin";
+ break;
+ default:
+ dev_err(&pdev->dev, "Unknown signature.\n");
+ goto end;
+ }
+
+ retval = request_firmware(&fw, name, &pdev->dev);
+ if (retval)
+ goto end;
+
+ retval = -EIO;
+
+ for (frame = (struct stframe *)fw->data;
+ frame < (struct stframe *)(fw->data + fw->size);
+ frame = (struct stframe *)((u8 *)(frame + 1) +
+ frame->count)) {
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ outw(0xf0, base); /* start upload sequence */
+ outw(0x00, base);
+ outw(frame->addr, base); /* lsb of address */
+
+ word_count = frame->count / 2 + frame->count % 2;
+ outw(word_count, base);
+ InterruptTheCard(base);
+
+ udelay(100); /* 0x2f */
+
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ status = inw(base + 0x4);
+ if (status != 0) {
+ dev_warn(&pdev->dev, "Card%d rejected load header:\n"
+ "Address:0x%x\n"
+ "Count:0x%x\n"
+ "Status:0x%x\n",
+ index + 1, frame->addr, frame->count, status);
+ goto errrelfw;
+ }
+ outsw(base, frame->data, word_count);
+
+ InterruptTheCard(base);
+
+ udelay(50); /* 0x0f */
+
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ status = inw(base + 0x4);
+ if (status != 0) {
+ dev_err(&pdev->dev, "Card%d got out of sync.Card "
+ "Status:0x%x\n", index + 1, status);
+ goto errrelfw;
+ }
+ }
+
+/* XXX: should we test it by reading it back and comparing with original like
+ * in load firmware package? */
+ for (frame = (struct stframe *)fw->data;
+ frame < (struct stframe *)(fw->data + fw->size);
+ frame = (struct stframe *)((u8 *)(frame + 1) +
+ frame->count)) {
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ outw(0xf1, base); /* start download sequence */
+ outw(0x00, base);
+ outw(frame->addr, base); /* lsb of address */
+
+ word_count = (frame->count >> 1) + frame->count % 2;
+ outw(word_count + 1, base);
+ InterruptTheCard(base);
+
+ udelay(50); /* 0xf */
+
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ status = inw(base + 0x4);
+ if (status != 0) {
+ dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
+ "Address:0x%x\n"
+ "Count:0x%x\n"
+ "Status: 0x%x\n",
+ index + 1, frame->addr, frame->count, status);
+ goto errrelfw;
+ }
+
+ data = kmalloc(word_count * 2, GFP_KERNEL);
+ if (data == NULL) {
+ dev_err(&pdev->dev, "Card%d, firmware upload "
+ "failed, not enough memory\n", index + 1);
+ goto errrelfw;
+ }
+ inw(base);
+ insw(base, data, word_count);
+ InterruptTheCard(base);
+
+ for (a = 0; a < frame->count; a++)
+ if (data[a] != frame->data[a]) {
+ kfree(data);
+ dev_err(&pdev->dev, "Card%d, firmware upload "
+ "failed\n", index + 1);
+ goto errrelfw;
+ }
+ kfree(data);
+
+ udelay(50); /* 0xf */
+
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ status = inw(base + 0x4);
+ if (status != 0) {
+ dev_err(&pdev->dev, "Card%d verify got out of sync. "
+ "Card Status:0x%x\n", index + 1, status);
+ goto errrelfw;
+ }
+ }
+
+ /* xfer ctrl */
+ if (WaitTillCardIsFree(base))
+ goto errrelfw;
+
+ outw(0xf2, base);
+ outw(0x800, base);
+ outw(0x0, base);
+ outw(0x0, base);
+ InterruptTheCard(base);
+ outw(0x0, base + 0x4); /* for ISI4608 cards */
+
+ board->status |= FIRMWARE_LOADED;
+ retval = 0;
+
+errrelfw:
+ release_firmware(fw);
+end:
+ return retval;
+}
+
+/*
+ * Insmod can set static symbols so keep these static
+ */
+static unsigned int card_count;
+
+static int __devinit isicom_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ unsigned int uninitialized_var(signature), index;
+ int retval = -EPERM;
+ struct isi_board *board = NULL;
+
+ if (card_count >= BOARD_COUNT)
+ goto err;
+
+ retval = pci_enable_device(pdev);
+ if (retval) {
+ dev_err(&pdev->dev, "failed to enable\n");
+ goto err;
+ }
+
+ dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
+
+ /* allot the first empty slot in the array */
+ for (index = 0; index < BOARD_COUNT; index++) {
+ if (isi_card[index].base == 0) {
+ board = &isi_card[index];
+ break;
+ }
+ }
+ if (index == BOARD_COUNT) {
+ retval = -ENODEV;
+ goto err_disable;
+ }
+
+ board->index = index;
+ board->base = pci_resource_start(pdev, 3);
+ board->irq = pdev->irq;
+ card_count++;
+
+ pci_set_drvdata(pdev, board);
+
+ retval = pci_request_region(pdev, 3, ISICOM_NAME);
+ if (retval) {
+ dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
+ "will be disabled.\n", board->base, board->base + 15,
+ index + 1);
+ retval = -EBUSY;
+ goto errdec;
+ }
+
+ retval = request_irq(board->irq, isicom_interrupt,
+ IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
+ if (retval < 0) {
+ dev_err(&pdev->dev, "Could not install handler at Irq %d. "
+ "Card%d will be disabled.\n", board->irq, index + 1);
+ goto errunrr;
+ }
+
+ retval = reset_card(pdev, index, &signature);
+ if (retval < 0)
+ goto errunri;
+
+ retval = load_firmware(pdev, index, signature);
+ if (retval < 0)
+ goto errunri;
+
+ for (index = 0; index < board->port_count; index++)
+ tty_register_device(isicom_normal, board->index * 16 + index,
+ &pdev->dev);
+
+ return 0;
+
+errunri:
+ free_irq(board->irq, board);
+errunrr:
+ pci_release_region(pdev, 3);
+errdec:
+ board->base = 0;
+ card_count--;
+err_disable:
+ pci_disable_device(pdev);
+err:
+ return retval;
+}
+
+static void __devexit isicom_remove(struct pci_dev *pdev)
+{
+ struct isi_board *board = pci_get_drvdata(pdev);
+ unsigned int i;
+
+ for (i = 0; i < board->port_count; i++)
+ tty_unregister_device(isicom_normal, board->index * 16 + i);
+
+ free_irq(board->irq, board);
+ pci_release_region(pdev, 3);
+ board->base = 0;
+ card_count--;
+ pci_disable_device(pdev);
+}
+
+static int __init isicom_init(void)
+{
+ int retval, idx, channel;
+ struct isi_port *port;
+
+ for (idx = 0; idx < BOARD_COUNT; idx++) {
+ port = &isi_ports[idx * 16];
+ isi_card[idx].ports = port;
+ spin_lock_init(&isi_card[idx].card_lock);
+ for (channel = 0; channel < 16; channel++, port++) {
+ tty_port_init(&port->port);
+ port->port.ops = &isicom_port_ops;
+ port->magic = ISICOM_MAGIC;
+ port->card = &isi_card[idx];
+ port->channel = channel;
+ port->port.close_delay = 50 * HZ/100;
+ port->port.closing_wait = 3000 * HZ/100;
+ port->status = 0;
+ /* . . . */
+ }
+ isi_card[idx].base = 0;
+ isi_card[idx].irq = 0;
+ }
+
+ /* tty driver structure initialization */
+ isicom_normal = alloc_tty_driver(PORT_COUNT);
+ if (!isicom_normal) {
+ retval = -ENOMEM;
+ goto error;
+ }
+
+ isicom_normal->owner = THIS_MODULE;
+ isicom_normal->name = "ttyM";
+ isicom_normal->major = ISICOM_NMAJOR;
+ isicom_normal->minor_start = 0;
+ isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
+ isicom_normal->subtype = SERIAL_TYPE_NORMAL;
+ isicom_normal->init_termios = tty_std_termios;
+ isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
+ CLOCAL;
+ isicom_normal->flags = TTY_DRIVER_REAL_RAW |
+ TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
+ tty_set_operations(isicom_normal, &isicom_ops);
+
+ retval = tty_register_driver(isicom_normal);
+ if (retval) {
+ pr_debug("Couldn't register the dialin driver\n");
+ goto err_puttty;
+ }
+
+ retval = pci_register_driver(&isicom_driver);
+ if (retval < 0) {
+ pr_err("Unable to register pci driver.\n");
+ goto err_unrtty;
+ }
+
+ mod_timer(&tx, jiffies + 1);
+
+ return 0;
+err_unrtty:
+ tty_unregister_driver(isicom_normal);
+err_puttty:
+ put_tty_driver(isicom_normal);
+error:
+ return retval;
+}
+
+static void __exit isicom_exit(void)
+{
+ del_timer_sync(&tx);
+
+ pci_unregister_driver(&isicom_driver);
+ tty_unregister_driver(isicom_normal);
+ put_tty_driver(isicom_normal);
+}
+
+module_init(isicom_init);
+module_exit(isicom_exit);
+
+MODULE_AUTHOR("MultiTech");
+MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("isi608.bin");
+MODULE_FIRMWARE("isi608em.bin");
+MODULE_FIRMWARE("isi616em.bin");
+MODULE_FIRMWARE("isi4608.bin");
+MODULE_FIRMWARE("isi4616.bin");
--- /dev/null
+/*****************************************************************************/
+/*
+ * moxa.c -- MOXA Intellio family multiport serial driver.
+ *
+ * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
+ * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
+ *
+ * This code is loosely based on the Linux serial driver, written by
+ * Linus Torvalds, Theodore T'so and others.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+/*
+ * MOXA Intellio Series Driver
+ * for : LINUX
+ * date : 1999/1/7
+ * version : 5.1
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/errno.h>
+#include <linux/firmware.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/serial.h>
+#include <linux/tty_driver.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#include "moxa.h"
+
+#define MOXA_VERSION "6.0k"
+
+#define MOXA_FW_HDRLEN 32
+
+#define MOXAMAJOR 172
+
+#define MAX_BOARDS 4 /* Don't change this value */
+#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
+#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
+
+#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
+ (brd)->boardType == MOXA_BOARD_C320_PCI)
+
+/*
+ * Define the Moxa PCI vendor and device IDs.
+ */
+#define MOXA_BUS_TYPE_ISA 0
+#define MOXA_BUS_TYPE_PCI 1
+
+enum {
+ MOXA_BOARD_C218_PCI = 1,
+ MOXA_BOARD_C218_ISA,
+ MOXA_BOARD_C320_PCI,
+ MOXA_BOARD_C320_ISA,
+ MOXA_BOARD_CP204J,
+};
+
+static char *moxa_brdname[] =
+{
+ "C218 Turbo PCI series",
+ "C218 Turbo ISA series",
+ "C320 Turbo PCI series",
+ "C320 Turbo ISA series",
+ "CP-204J series",
+};
+
+#ifdef CONFIG_PCI
+static struct pci_device_id moxa_pcibrds[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
+ .driver_data = MOXA_BOARD_C218_PCI },
+ { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
+ .driver_data = MOXA_BOARD_C320_PCI },
+ { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
+ .driver_data = MOXA_BOARD_CP204J },
+ { 0 }
+};
+MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
+#endif /* CONFIG_PCI */
+
+struct moxa_port;
+
+static struct moxa_board_conf {
+ int boardType;
+ int numPorts;
+ int busType;
+
+ unsigned int ready;
+
+ struct moxa_port *ports;
+
+ void __iomem *basemem;
+ void __iomem *intNdx;
+ void __iomem *intPend;
+ void __iomem *intTable;
+} moxa_boards[MAX_BOARDS];
+
+struct mxser_mstatus {
+ tcflag_t cflag;
+ int cts;
+ int dsr;
+ int ri;
+ int dcd;
+};
+
+struct moxaq_str {
+ int inq;
+ int outq;
+};
+
+struct moxa_port {
+ struct tty_port port;
+ struct moxa_board_conf *board;
+ void __iomem *tableAddr;
+
+ int type;
+ int cflag;
+ unsigned long statusflags;
+
+ u8 DCDState; /* Protected by the port lock */
+ u8 lineCtrl;
+ u8 lowChkFlag;
+};
+
+struct mon_str {
+ int tick;
+ int rxcnt[MAX_PORTS];
+ int txcnt[MAX_PORTS];
+};
+
+/* statusflags */
+#define TXSTOPPED 1
+#define LOWWAIT 2
+#define EMPTYWAIT 3
+
+#define SERIAL_DO_RESTART
+
+#define WAKEUP_CHARS 256
+
+static int ttymajor = MOXAMAJOR;
+static struct mon_str moxaLog;
+static unsigned int moxaFuncTout = HZ / 2;
+static unsigned int moxaLowWaterChk;
+static DEFINE_MUTEX(moxa_openlock);
+static DEFINE_SPINLOCK(moxa_lock);
+
+static unsigned long baseaddr[MAX_BOARDS];
+static unsigned int type[MAX_BOARDS];
+static unsigned int numports[MAX_BOARDS];
+
+MODULE_AUTHOR("William Chen");
+MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("c218tunx.cod");
+MODULE_FIRMWARE("cp204unx.cod");
+MODULE_FIRMWARE("c320tunx.cod");
+
+module_param_array(type, uint, NULL, 0);
+MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
+module_param_array(baseaddr, ulong, NULL, 0);
+MODULE_PARM_DESC(baseaddr, "base address");
+module_param_array(numports, uint, NULL, 0);
+MODULE_PARM_DESC(numports, "numports (ignored for C218)");
+
+module_param(ttymajor, int, 0);
+
+/*
+ * static functions:
+ */
+static int moxa_open(struct tty_struct *, struct file *);
+static void moxa_close(struct tty_struct *, struct file *);
+static int moxa_write(struct tty_struct *, const unsigned char *, int);
+static int moxa_write_room(struct tty_struct *);
+static void moxa_flush_buffer(struct tty_struct *);
+static int moxa_chars_in_buffer(struct tty_struct *);
+static void moxa_set_termios(struct tty_struct *, struct ktermios *);
+static void moxa_stop(struct tty_struct *);
+static void moxa_start(struct tty_struct *);
+static void moxa_hangup(struct tty_struct *);
+static int moxa_tiocmget(struct tty_struct *tty);
+static int moxa_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear);
+static void moxa_poll(unsigned long);
+static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
+static void moxa_shutdown(struct tty_port *);
+static int moxa_carrier_raised(struct tty_port *);
+static void moxa_dtr_rts(struct tty_port *, int);
+/*
+ * moxa board interface functions:
+ */
+static void MoxaPortEnable(struct moxa_port *);
+static void MoxaPortDisable(struct moxa_port *);
+static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
+static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
+static void MoxaPortLineCtrl(struct moxa_port *, int, int);
+static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
+static int MoxaPortLineStatus(struct moxa_port *);
+static void MoxaPortFlushData(struct moxa_port *, int);
+static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
+static int MoxaPortReadData(struct moxa_port *);
+static int MoxaPortTxQueue(struct moxa_port *);
+static int MoxaPortRxQueue(struct moxa_port *);
+static int MoxaPortTxFree(struct moxa_port *);
+static void MoxaPortTxDisable(struct moxa_port *);
+static void MoxaPortTxEnable(struct moxa_port *);
+static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
+static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
+static void MoxaSetFifo(struct moxa_port *port, int enable);
+
+/*
+ * I/O functions
+ */
+
+static DEFINE_SPINLOCK(moxafunc_lock);
+
+static void moxa_wait_finish(void __iomem *ofsAddr)
+{
+ unsigned long end = jiffies + moxaFuncTout;
+
+ while (readw(ofsAddr + FuncCode) != 0)
+ if (time_after(jiffies, end))
+ return;
+ if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
+ printk(KERN_WARNING "moxa function expired\n");
+}
+
+static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&moxafunc_lock, flags);
+ writew(arg, ofsAddr + FuncArg);
+ writew(cmd, ofsAddr + FuncCode);
+ moxa_wait_finish(ofsAddr);
+ spin_unlock_irqrestore(&moxafunc_lock, flags);
+}
+
+static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
+{
+ unsigned long flags;
+ u16 ret;
+ spin_lock_irqsave(&moxafunc_lock, flags);
+ writew(arg, ofsAddr + FuncArg);
+ writew(cmd, ofsAddr + FuncCode);
+ moxa_wait_finish(ofsAddr);
+ ret = readw(ofsAddr + FuncArg);
+ spin_unlock_irqrestore(&moxafunc_lock, flags);
+ return ret;
+}
+
+static void moxa_low_water_check(void __iomem *ofsAddr)
+{
+ u16 rptr, wptr, mask, len;
+
+ if (readb(ofsAddr + FlagStat) & Xoff_state) {
+ rptr = readw(ofsAddr + RXrptr);
+ wptr = readw(ofsAddr + RXwptr);
+ mask = readw(ofsAddr + RX_mask);
+ len = (wptr - rptr) & mask;
+ if (len <= Low_water)
+ moxafunc(ofsAddr, FC_SendXon, 0);
+ }
+}
+
+/*
+ * TTY operations
+ */
+
+static int moxa_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct moxa_port *ch = tty->driver_data;
+ void __user *argp = (void __user *)arg;
+ int status, ret = 0;
+
+ if (tty->index == MAX_PORTS) {
+ if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
+ cmd != MOXA_GETMSTATUS)
+ return -EINVAL;
+ } else if (!ch)
+ return -ENODEV;
+
+ switch (cmd) {
+ case MOXA_GETDATACOUNT:
+ moxaLog.tick = jiffies;
+ if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
+ ret = -EFAULT;
+ break;
+ case MOXA_FLUSH_QUEUE:
+ MoxaPortFlushData(ch, arg);
+ break;
+ case MOXA_GET_IOQUEUE: {
+ struct moxaq_str __user *argm = argp;
+ struct moxaq_str tmp;
+ struct moxa_port *p;
+ unsigned int i, j;
+
+ for (i = 0; i < MAX_BOARDS; i++) {
+ p = moxa_boards[i].ports;
+ for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
+ memset(&tmp, 0, sizeof(tmp));
+ spin_lock_bh(&moxa_lock);
+ if (moxa_boards[i].ready) {
+ tmp.inq = MoxaPortRxQueue(p);
+ tmp.outq = MoxaPortTxQueue(p);
+ }
+ spin_unlock_bh(&moxa_lock);
+ if (copy_to_user(argm, &tmp, sizeof(tmp)))
+ return -EFAULT;
+ }
+ }
+ break;
+ } case MOXA_GET_OQUEUE:
+ status = MoxaPortTxQueue(ch);
+ ret = put_user(status, (unsigned long __user *)argp);
+ break;
+ case MOXA_GET_IQUEUE:
+ status = MoxaPortRxQueue(ch);
+ ret = put_user(status, (unsigned long __user *)argp);
+ break;
+ case MOXA_GETMSTATUS: {
+ struct mxser_mstatus __user *argm = argp;
+ struct mxser_mstatus tmp;
+ struct moxa_port *p;
+ unsigned int i, j;
+
+ for (i = 0; i < MAX_BOARDS; i++) {
+ p = moxa_boards[i].ports;
+ for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
+ struct tty_struct *ttyp;
+ memset(&tmp, 0, sizeof(tmp));
+ spin_lock_bh(&moxa_lock);
+ if (!moxa_boards[i].ready) {
+ spin_unlock_bh(&moxa_lock);
+ goto copy;
+ }
+
+ status = MoxaPortLineStatus(p);
+ spin_unlock_bh(&moxa_lock);
+
+ if (status & 1)
+ tmp.cts = 1;
+ if (status & 2)
+ tmp.dsr = 1;
+ if (status & 4)
+ tmp.dcd = 1;
+
+ ttyp = tty_port_tty_get(&p->port);
+ if (!ttyp || !ttyp->termios)
+ tmp.cflag = p->cflag;
+ else
+ tmp.cflag = ttyp->termios->c_cflag;
+ tty_kref_put(tty);
+copy:
+ if (copy_to_user(argm, &tmp, sizeof(tmp)))
+ return -EFAULT;
+ }
+ }
+ break;
+ }
+ case TIOCGSERIAL:
+ mutex_lock(&ch->port.mutex);
+ ret = moxa_get_serial_info(ch, argp);
+ mutex_unlock(&ch->port.mutex);
+ break;
+ case TIOCSSERIAL:
+ mutex_lock(&ch->port.mutex);
+ ret = moxa_set_serial_info(ch, argp);
+ mutex_unlock(&ch->port.mutex);
+ break;
+ default:
+ ret = -ENOIOCTLCMD;
+ }
+ return ret;
+}
+
+static int moxa_break_ctl(struct tty_struct *tty, int state)
+{
+ struct moxa_port *port = tty->driver_data;
+
+ moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
+ Magic_code);
+ return 0;
+}
+
+static const struct tty_operations moxa_ops = {
+ .open = moxa_open,
+ .close = moxa_close,
+ .write = moxa_write,
+ .write_room = moxa_write_room,
+ .flush_buffer = moxa_flush_buffer,
+ .chars_in_buffer = moxa_chars_in_buffer,
+ .ioctl = moxa_ioctl,
+ .set_termios = moxa_set_termios,
+ .stop = moxa_stop,
+ .start = moxa_start,
+ .hangup = moxa_hangup,
+ .break_ctl = moxa_break_ctl,
+ .tiocmget = moxa_tiocmget,
+ .tiocmset = moxa_tiocmset,
+};
+
+static const struct tty_port_operations moxa_port_ops = {
+ .carrier_raised = moxa_carrier_raised,
+ .dtr_rts = moxa_dtr_rts,
+ .shutdown = moxa_shutdown,
+};
+
+static struct tty_driver *moxaDriver;
+static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
+
+/*
+ * HW init
+ */
+
+static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
+{
+ switch (brd->boardType) {
+ case MOXA_BOARD_C218_ISA:
+ case MOXA_BOARD_C218_PCI:
+ if (model != 1)
+ goto err;
+ break;
+ case MOXA_BOARD_CP204J:
+ if (model != 3)
+ goto err;
+ break;
+ default:
+ if (model != 2)
+ goto err;
+ break;
+ }
+ return 0;
+err:
+ return -EINVAL;
+}
+
+static int moxa_check_fw(const void *ptr)
+{
+ const __le16 *lptr = ptr;
+
+ if (*lptr != cpu_to_le16(0x7980))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
+ size_t len)
+{
+ void __iomem *baseAddr = brd->basemem;
+ u16 tmp;
+
+ writeb(HW_reset, baseAddr + Control_reg); /* reset */
+ msleep(10);
+ memset_io(baseAddr, 0, 4096);
+ memcpy_toio(baseAddr, buf, len); /* download BIOS */
+ writeb(0, baseAddr + Control_reg); /* restart */
+
+ msleep(2000);
+
+ switch (brd->boardType) {
+ case MOXA_BOARD_C218_ISA:
+ case MOXA_BOARD_C218_PCI:
+ tmp = readw(baseAddr + C218_key);
+ if (tmp != C218_KeyCode)
+ goto err;
+ break;
+ case MOXA_BOARD_CP204J:
+ tmp = readw(baseAddr + C218_key);
+ if (tmp != CP204J_KeyCode)
+ goto err;
+ break;
+ default:
+ tmp = readw(baseAddr + C320_key);
+ if (tmp != C320_KeyCode)
+ goto err;
+ tmp = readw(baseAddr + C320_status);
+ if (tmp != STS_init) {
+ printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
+ "module not found\n");
+ return -EIO;
+ }
+ break;
+ }
+
+ return 0;
+err:
+ printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
+ return -EIO;
+}
+
+static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
+ size_t len)
+{
+ void __iomem *baseAddr = brd->basemem;
+
+ if (len < 7168) {
+ printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
+ return -EINVAL;
+ }
+
+ writew(len - 7168 - 2, baseAddr + C320bapi_len);
+ writeb(1, baseAddr + Control_reg); /* Select Page 1 */
+ memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
+ writeb(2, baseAddr + Control_reg); /* Select Page 2 */
+ memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
+
+ return 0;
+}
+
+static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
+ size_t len)
+{
+ void __iomem *baseAddr = brd->basemem;
+ const __le16 *uptr = ptr;
+ size_t wlen, len2, j;
+ unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
+ unsigned int i, retry;
+ u16 usum, keycode;
+
+ keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
+ C218_KeyCode;
+
+ switch (brd->boardType) {
+ case MOXA_BOARD_CP204J:
+ case MOXA_BOARD_C218_ISA:
+ case MOXA_BOARD_C218_PCI:
+ key = C218_key;
+ loadbuf = C218_LoadBuf;
+ loadlen = C218DLoad_len;
+ checksum = C218check_sum;
+ checksum_ok = C218chksum_ok;
+ break;
+ default:
+ key = C320_key;
+ keycode = C320_KeyCode;
+ loadbuf = C320_LoadBuf;
+ loadlen = C320DLoad_len;
+ checksum = C320check_sum;
+ checksum_ok = C320chksum_ok;
+ break;
+ }
+
+ usum = 0;
+ wlen = len >> 1;
+ for (i = 0; i < wlen; i++)
+ usum += le16_to_cpu(uptr[i]);
+ retry = 0;
+ do {
+ wlen = len >> 1;
+ j = 0;
+ while (wlen) {
+ len2 = (wlen > 2048) ? 2048 : wlen;
+ wlen -= len2;
+ memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
+ j += len2 << 1;
+
+ writew(len2, baseAddr + loadlen);
+ writew(0, baseAddr + key);
+ for (i = 0; i < 100; i++) {
+ if (readw(baseAddr + key) == keycode)
+ break;
+ msleep(10);
+ }
+ if (readw(baseAddr + key) != keycode)
+ return -EIO;
+ }
+ writew(0, baseAddr + loadlen);
+ writew(usum, baseAddr + checksum);
+ writew(0, baseAddr + key);
+ for (i = 0; i < 100; i++) {
+ if (readw(baseAddr + key) == keycode)
+ break;
+ msleep(10);
+ }
+ retry++;
+ } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
+ if (readb(baseAddr + checksum_ok) != 1)
+ return -EIO;
+
+ writew(0, baseAddr + key);
+ for (i = 0; i < 600; i++) {
+ if (readw(baseAddr + Magic_no) == Magic_code)
+ break;
+ msleep(10);
+ }
+ if (readw(baseAddr + Magic_no) != Magic_code)
+ return -EIO;
+
+ if (MOXA_IS_320(brd)) {
+ if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
+ writew(0x3800, baseAddr + TMS320_PORT1);
+ writew(0x3900, baseAddr + TMS320_PORT2);
+ writew(28499, baseAddr + TMS320_CLOCK);
+ } else {
+ writew(0x3200, baseAddr + TMS320_PORT1);
+ writew(0x3400, baseAddr + TMS320_PORT2);
+ writew(19999, baseAddr + TMS320_CLOCK);
+ }
+ }
+ writew(1, baseAddr + Disable_IRQ);
+ writew(0, baseAddr + Magic_no);
+ for (i = 0; i < 500; i++) {
+ if (readw(baseAddr + Magic_no) == Magic_code)
+ break;
+ msleep(10);
+ }
+ if (readw(baseAddr + Magic_no) != Magic_code)
+ return -EIO;
+
+ if (MOXA_IS_320(brd)) {
+ j = readw(baseAddr + Module_cnt);
+ if (j <= 0)
+ return -EIO;
+ brd->numPorts = j * 8;
+ writew(j, baseAddr + Module_no);
+ writew(0, baseAddr + Magic_no);
+ for (i = 0; i < 600; i++) {
+ if (readw(baseAddr + Magic_no) == Magic_code)
+ break;
+ msleep(10);
+ }
+ if (readw(baseAddr + Magic_no) != Magic_code)
+ return -EIO;
+ }
+ brd->intNdx = baseAddr + IRQindex;
+ brd->intPend = baseAddr + IRQpending;
+ brd->intTable = baseAddr + IRQtable;
+
+ return 0;
+}
+
+static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
+ size_t len)
+{
+ void __iomem *ofsAddr, *baseAddr = brd->basemem;
+ struct moxa_port *port;
+ int retval, i;
+
+ if (len % 2) {
+ printk(KERN_ERR "MOXA: bios length is not even\n");
+ return -EINVAL;
+ }
+
+ retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
+ if (retval)
+ return retval;
+
+ switch (brd->boardType) {
+ case MOXA_BOARD_C218_ISA:
+ case MOXA_BOARD_C218_PCI:
+ case MOXA_BOARD_CP204J:
+ port = brd->ports;
+ for (i = 0; i < brd->numPorts; i++, port++) {
+ port->board = brd;
+ port->DCDState = 0;
+ port->tableAddr = baseAddr + Extern_table +
+ Extern_size * i;
+ ofsAddr = port->tableAddr;
+ writew(C218rx_mask, ofsAddr + RX_mask);
+ writew(C218tx_mask, ofsAddr + TX_mask);
+ writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
+ writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
+
+ writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
+ writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
+
+ }
+ break;
+ default:
+ port = brd->ports;
+ for (i = 0; i < brd->numPorts; i++, port++) {
+ port->board = brd;
+ port->DCDState = 0;
+ port->tableAddr = baseAddr + Extern_table +
+ Extern_size * i;
+ ofsAddr = port->tableAddr;
+ switch (brd->numPorts) {
+ case 8:
+ writew(C320p8rx_mask, ofsAddr + RX_mask);
+ writew(C320p8tx_mask, ofsAddr + TX_mask);
+ writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
+ writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
+ writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
+ writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
+
+ break;
+ case 16:
+ writew(C320p16rx_mask, ofsAddr + RX_mask);
+ writew(C320p16tx_mask, ofsAddr + TX_mask);
+ writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
+ writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
+ writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
+ writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
+ break;
+
+ case 24:
+ writew(C320p24rx_mask, ofsAddr + RX_mask);
+ writew(C320p24tx_mask, ofsAddr + TX_mask);
+ writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
+ writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
+ writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
+ writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
+ break;
+ case 32:
+ writew(C320p32rx_mask, ofsAddr + RX_mask);
+ writew(C320p32tx_mask, ofsAddr + TX_mask);
+ writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
+ writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
+ writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
+ writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
+ writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
+ break;
+ }
+ }
+ break;
+ }
+ return 0;
+}
+
+static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
+{
+ const void *ptr = fw->data;
+ char rsn[64];
+ u16 lens[5];
+ size_t len;
+ unsigned int a, lenp, lencnt;
+ int ret = -EINVAL;
+ struct {
+ __le32 magic; /* 0x34303430 */
+ u8 reserved1[2];
+ u8 type; /* UNIX = 3 */
+ u8 model; /* C218T=1, C320T=2, CP204=3 */
+ u8 reserved2[8];
+ __le16 len[5];
+ } const *hdr = ptr;
+
+ BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
+
+ if (fw->size < MOXA_FW_HDRLEN) {
+ strcpy(rsn, "too short (even header won't fit)");
+ goto err;
+ }
+ if (hdr->magic != cpu_to_le32(0x30343034)) {
+ sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
+ goto err;
+ }
+ if (hdr->type != 3) {
+ sprintf(rsn, "not for linux, type is %u", hdr->type);
+ goto err;
+ }
+ if (moxa_check_fw_model(brd, hdr->model)) {
+ sprintf(rsn, "not for this card, model is %u", hdr->model);
+ goto err;
+ }
+
+ len = MOXA_FW_HDRLEN;
+ lencnt = hdr->model == 2 ? 5 : 3;
+ for (a = 0; a < ARRAY_SIZE(lens); a++) {
+ lens[a] = le16_to_cpu(hdr->len[a]);
+ if (lens[a] && len + lens[a] <= fw->size &&
+ moxa_check_fw(&fw->data[len]))
+ printk(KERN_WARNING "MOXA firmware: unexpected input "
+ "at offset %u, but going on\n", (u32)len);
+ if (!lens[a] && a < lencnt) {
+ sprintf(rsn, "too few entries in fw file");
+ goto err;
+ }
+ len += lens[a];
+ }
+
+ if (len != fw->size) {
+ sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
+ (u32)len);
+ goto err;
+ }
+
+ ptr += MOXA_FW_HDRLEN;
+ lenp = 0; /* bios */
+
+ strcpy(rsn, "read above");
+
+ ret = moxa_load_bios(brd, ptr, lens[lenp]);
+ if (ret)
+ goto err;
+
+ /* we skip the tty section (lens[1]), since we don't need it */
+ ptr += lens[lenp] + lens[lenp + 1];
+ lenp += 2; /* comm */
+
+ if (hdr->model == 2) {
+ ret = moxa_load_320b(brd, ptr, lens[lenp]);
+ if (ret)
+ goto err;
+ /* skip another tty */
+ ptr += lens[lenp] + lens[lenp + 1];
+ lenp += 2;
+ }
+
+ ret = moxa_load_code(brd, ptr, lens[lenp]);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
+ return ret;
+}
+
+static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
+{
+ const struct firmware *fw;
+ const char *file;
+ struct moxa_port *p;
+ unsigned int i;
+ int ret;
+
+ brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
+ GFP_KERNEL);
+ if (brd->ports == NULL) {
+ printk(KERN_ERR "cannot allocate memory for ports\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
+ tty_port_init(&p->port);
+ p->port.ops = &moxa_port_ops;
+ p->type = PORT_16550A;
+ p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
+ }
+
+ switch (brd->boardType) {
+ case MOXA_BOARD_C218_ISA:
+ case MOXA_BOARD_C218_PCI:
+ file = "c218tunx.cod";
+ break;
+ case MOXA_BOARD_CP204J:
+ file = "cp204unx.cod";
+ break;
+ default:
+ file = "c320tunx.cod";
+ break;
+ }
+
+ ret = request_firmware(&fw, file, dev);
+ if (ret) {
+ printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
+ "you've placed '%s' file into your firmware "
+ "loader directory (e.g. /lib/firmware)\n",
+ file);
+ goto err_free;
+ }
+
+ ret = moxa_load_fw(brd, fw);
+
+ release_firmware(fw);
+
+ if (ret)
+ goto err_free;
+
+ spin_lock_bh(&moxa_lock);
+ brd->ready = 1;
+ if (!timer_pending(&moxaTimer))
+ mod_timer(&moxaTimer, jiffies + HZ / 50);
+ spin_unlock_bh(&moxa_lock);
+
+ return 0;
+err_free:
+ kfree(brd->ports);
+err:
+ return ret;
+}
+
+static void moxa_board_deinit(struct moxa_board_conf *brd)
+{
+ unsigned int a, opened;
+
+ mutex_lock(&moxa_openlock);
+ spin_lock_bh(&moxa_lock);
+ brd->ready = 0;
+ spin_unlock_bh(&moxa_lock);
+
+ /* pci hot-un-plug support */
+ for (a = 0; a < brd->numPorts; a++)
+ if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
+ struct tty_struct *tty = tty_port_tty_get(
+ &brd->ports[a].port);
+ if (tty) {
+ tty_hangup(tty);
+ tty_kref_put(tty);
+ }
+ }
+ while (1) {
+ opened = 0;
+ for (a = 0; a < brd->numPorts; a++)
+ if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
+ opened++;
+ mutex_unlock(&moxa_openlock);
+ if (!opened)
+ break;
+ msleep(50);
+ mutex_lock(&moxa_openlock);
+ }
+
+ iounmap(brd->basemem);
+ brd->basemem = NULL;
+ kfree(brd->ports);
+}
+
+#ifdef CONFIG_PCI
+static int __devinit moxa_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct moxa_board_conf *board;
+ unsigned int i;
+ int board_type = ent->driver_data;
+ int retval;
+
+ retval = pci_enable_device(pdev);
+ if (retval) {
+ dev_err(&pdev->dev, "can't enable pci device\n");
+ goto err;
+ }
+
+ for (i = 0; i < MAX_BOARDS; i++)
+ if (moxa_boards[i].basemem == NULL)
+ break;
+
+ retval = -ENODEV;
+ if (i >= MAX_BOARDS) {
+ dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
+ "found. Board is ignored.\n", MAX_BOARDS);
+ goto err;
+ }
+
+ board = &moxa_boards[i];
+
+ retval = pci_request_region(pdev, 2, "moxa-base");
+ if (retval) {
+ dev_err(&pdev->dev, "can't request pci region 2\n");
+ goto err;
+ }
+
+ board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
+ if (board->basemem == NULL) {
+ dev_err(&pdev->dev, "can't remap io space 2\n");
+ goto err_reg;
+ }
+
+ board->boardType = board_type;
+ switch (board_type) {
+ case MOXA_BOARD_C218_ISA:
+ case MOXA_BOARD_C218_PCI:
+ board->numPorts = 8;
+ break;
+
+ case MOXA_BOARD_CP204J:
+ board->numPorts = 4;
+ break;
+ default:
+ board->numPorts = 0;
+ break;
+ }
+ board->busType = MOXA_BUS_TYPE_PCI;
+
+ retval = moxa_init_board(board, &pdev->dev);
+ if (retval)
+ goto err_base;
+
+ pci_set_drvdata(pdev, board);
+
+ dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
+ moxa_brdname[board_type - 1], board->numPorts);
+
+ return 0;
+err_base:
+ iounmap(board->basemem);
+ board->basemem = NULL;
+err_reg:
+ pci_release_region(pdev, 2);
+err:
+ return retval;
+}
+
+static void __devexit moxa_pci_remove(struct pci_dev *pdev)
+{
+ struct moxa_board_conf *brd = pci_get_drvdata(pdev);
+
+ moxa_board_deinit(brd);
+
+ pci_release_region(pdev, 2);
+}
+
+static struct pci_driver moxa_pci_driver = {
+ .name = "moxa",
+ .id_table = moxa_pcibrds,
+ .probe = moxa_pci_probe,
+ .remove = __devexit_p(moxa_pci_remove)
+};
+#endif /* CONFIG_PCI */
+
+static int __init moxa_init(void)
+{
+ unsigned int isabrds = 0;
+ int retval = 0;
+ struct moxa_board_conf *brd = moxa_boards;
+ unsigned int i;
+
+ printk(KERN_INFO "MOXA Intellio family driver version %s\n",
+ MOXA_VERSION);
+ moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
+ if (!moxaDriver)
+ return -ENOMEM;
+
+ moxaDriver->owner = THIS_MODULE;
+ moxaDriver->name = "ttyMX";
+ moxaDriver->major = ttymajor;
+ moxaDriver->minor_start = 0;
+ moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
+ moxaDriver->subtype = SERIAL_TYPE_NORMAL;
+ moxaDriver->init_termios = tty_std_termios;
+ moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
+ moxaDriver->init_termios.c_ispeed = 9600;
+ moxaDriver->init_termios.c_ospeed = 9600;
+ moxaDriver->flags = TTY_DRIVER_REAL_RAW;
+ tty_set_operations(moxaDriver, &moxa_ops);
+
+ if (tty_register_driver(moxaDriver)) {
+ printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
+ put_tty_driver(moxaDriver);
+ return -1;
+ }
+
+ /* Find the boards defined from module args. */
+
+ for (i = 0; i < MAX_BOARDS; i++) {
+ if (!baseaddr[i])
+ break;
+ if (type[i] == MOXA_BOARD_C218_ISA ||
+ type[i] == MOXA_BOARD_C320_ISA) {
+ pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
+ isabrds + 1, moxa_brdname[type[i] - 1],
+ baseaddr[i]);
+ brd->boardType = type[i];
+ brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
+ numports[i];
+ brd->busType = MOXA_BUS_TYPE_ISA;
+ brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
+ if (!brd->basemem) {
+ printk(KERN_ERR "MOXA: can't remap %lx\n",
+ baseaddr[i]);
+ continue;
+ }
+ if (moxa_init_board(brd, NULL)) {
+ iounmap(brd->basemem);
+ brd->basemem = NULL;
+ continue;
+ }
+
+ printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
+ "ready (%u ports, firmware loaded)\n",
+ baseaddr[i], brd->numPorts);
+
+ brd++;
+ isabrds++;
+ }
+ }
+
+#ifdef CONFIG_PCI
+ retval = pci_register_driver(&moxa_pci_driver);
+ if (retval) {
+ printk(KERN_ERR "Can't register MOXA pci driver!\n");
+ if (isabrds)
+ retval = 0;
+ }
+#endif
+
+ return retval;
+}
+
+static void __exit moxa_exit(void)
+{
+ unsigned int i;
+
+#ifdef CONFIG_PCI
+ pci_unregister_driver(&moxa_pci_driver);
+#endif
+
+ for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
+ if (moxa_boards[i].ready)
+ moxa_board_deinit(&moxa_boards[i]);
+
+ del_timer_sync(&moxaTimer);
+
+ if (tty_unregister_driver(moxaDriver))
+ printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
+ "serial driver\n");
+ put_tty_driver(moxaDriver);
+}
+
+module_init(moxa_init);
+module_exit(moxa_exit);
+
+static void moxa_shutdown(struct tty_port *port)
+{
+ struct moxa_port *ch = container_of(port, struct moxa_port, port);
+ MoxaPortDisable(ch);
+ MoxaPortFlushData(ch, 2);
+ clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
+}
+
+static int moxa_carrier_raised(struct tty_port *port)
+{
+ struct moxa_port *ch = container_of(port, struct moxa_port, port);
+ int dcd;
+
+ spin_lock_irq(&port->lock);
+ dcd = ch->DCDState;
+ spin_unlock_irq(&port->lock);
+ return dcd;
+}
+
+static void moxa_dtr_rts(struct tty_port *port, int onoff)
+{
+ struct moxa_port *ch = container_of(port, struct moxa_port, port);
+ MoxaPortLineCtrl(ch, onoff, onoff);
+}
+
+
+static int moxa_open(struct tty_struct *tty, struct file *filp)
+{
+ struct moxa_board_conf *brd;
+ struct moxa_port *ch;
+ int port;
+ int retval;
+
+ port = tty->index;
+ if (port == MAX_PORTS) {
+ return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
+ }
+ if (mutex_lock_interruptible(&moxa_openlock))
+ return -ERESTARTSYS;
+ brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
+ if (!brd->ready) {
+ mutex_unlock(&moxa_openlock);
+ return -ENODEV;
+ }
+
+ if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
+ mutex_unlock(&moxa_openlock);
+ return -ENODEV;
+ }
+
+ ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
+ ch->port.count++;
+ tty->driver_data = ch;
+ tty_port_tty_set(&ch->port, tty);
+ mutex_lock(&ch->port.mutex);
+ if (!(ch->port.flags & ASYNC_INITIALIZED)) {
+ ch->statusflags = 0;
+ moxa_set_tty_param(tty, tty->termios);
+ MoxaPortLineCtrl(ch, 1, 1);
+ MoxaPortEnable(ch);
+ MoxaSetFifo(ch, ch->type == PORT_16550A);
+ ch->port.flags |= ASYNC_INITIALIZED;
+ }
+ mutex_unlock(&ch->port.mutex);
+ mutex_unlock(&moxa_openlock);
+
+ retval = tty_port_block_til_ready(&ch->port, tty, filp);
+ if (retval == 0)
+ set_bit(ASYNCB_NORMAL_ACTIVE, &ch->port.flags);
+ return retval;
+}
+
+static void moxa_close(struct tty_struct *tty, struct file *filp)
+{
+ struct moxa_port *ch = tty->driver_data;
+ ch->cflag = tty->termios->c_cflag;
+ tty_port_close(&ch->port, tty, filp);
+}
+
+static int moxa_write(struct tty_struct *tty,
+ const unsigned char *buf, int count)
+{
+ struct moxa_port *ch = tty->driver_data;
+ int len;
+
+ if (ch == NULL)
+ return 0;
+
+ spin_lock_bh(&moxa_lock);
+ len = MoxaPortWriteData(tty, buf, count);
+ spin_unlock_bh(&moxa_lock);
+
+ set_bit(LOWWAIT, &ch->statusflags);
+ return len;
+}
+
+static int moxa_write_room(struct tty_struct *tty)
+{
+ struct moxa_port *ch;
+
+ if (tty->stopped)
+ return 0;
+ ch = tty->driver_data;
+ if (ch == NULL)
+ return 0;
+ return MoxaPortTxFree(ch);
+}
+
+static void moxa_flush_buffer(struct tty_struct *tty)
+{
+ struct moxa_port *ch = tty->driver_data;
+
+ if (ch == NULL)
+ return;
+ MoxaPortFlushData(ch, 1);
+ tty_wakeup(tty);
+}
+
+static int moxa_chars_in_buffer(struct tty_struct *tty)
+{
+ struct moxa_port *ch = tty->driver_data;
+ int chars;
+
+ chars = MoxaPortTxQueue(ch);
+ if (chars)
+ /*
+ * Make it possible to wakeup anything waiting for output
+ * in tty_ioctl.c, etc.
+ */
+ set_bit(EMPTYWAIT, &ch->statusflags);
+ return chars;
+}
+
+static int moxa_tiocmget(struct tty_struct *tty)
+{
+ struct moxa_port *ch = tty->driver_data;
+ int flag = 0, dtr, rts;
+
+ MoxaPortGetLineOut(ch, &dtr, &rts);
+ if (dtr)
+ flag |= TIOCM_DTR;
+ if (rts)
+ flag |= TIOCM_RTS;
+ dtr = MoxaPortLineStatus(ch);
+ if (dtr & 1)
+ flag |= TIOCM_CTS;
+ if (dtr & 2)
+ flag |= TIOCM_DSR;
+ if (dtr & 4)
+ flag |= TIOCM_CD;
+ return flag;
+}
+
+static int moxa_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct moxa_port *ch;
+ int port;
+ int dtr, rts;
+
+ port = tty->index;
+ mutex_lock(&moxa_openlock);
+ ch = tty->driver_data;
+ if (!ch) {
+ mutex_unlock(&moxa_openlock);
+ return -EINVAL;
+ }
+
+ MoxaPortGetLineOut(ch, &dtr, &rts);
+ if (set & TIOCM_RTS)
+ rts = 1;
+ if (set & TIOCM_DTR)
+ dtr = 1;
+ if (clear & TIOCM_RTS)
+ rts = 0;
+ if (clear & TIOCM_DTR)
+ dtr = 0;
+ MoxaPortLineCtrl(ch, dtr, rts);
+ mutex_unlock(&moxa_openlock);
+ return 0;
+}
+
+static void moxa_set_termios(struct tty_struct *tty,
+ struct ktermios *old_termios)
+{
+ struct moxa_port *ch = tty->driver_data;
+
+ if (ch == NULL)
+ return;
+ moxa_set_tty_param(tty, old_termios);
+ if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
+ wake_up_interruptible(&ch->port.open_wait);
+}
+
+static void moxa_stop(struct tty_struct *tty)
+{
+ struct moxa_port *ch = tty->driver_data;
+
+ if (ch == NULL)
+ return;
+ MoxaPortTxDisable(ch);
+ set_bit(TXSTOPPED, &ch->statusflags);
+}
+
+
+static void moxa_start(struct tty_struct *tty)
+{
+ struct moxa_port *ch = tty->driver_data;
+
+ if (ch == NULL)
+ return;
+
+ if (!(ch->statusflags & TXSTOPPED))
+ return;
+
+ MoxaPortTxEnable(ch);
+ clear_bit(TXSTOPPED, &ch->statusflags);
+}
+
+static void moxa_hangup(struct tty_struct *tty)
+{
+ struct moxa_port *ch = tty->driver_data;
+ tty_port_hangup(&ch->port);
+}
+
+static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
+{
+ struct tty_struct *tty;
+ unsigned long flags;
+ dcd = !!dcd;
+
+ spin_lock_irqsave(&p->port.lock, flags);
+ if (dcd != p->DCDState) {
+ p->DCDState = dcd;
+ spin_unlock_irqrestore(&p->port.lock, flags);
+ tty = tty_port_tty_get(&p->port);
+ if (tty && C_CLOCAL(tty) && !dcd)
+ tty_hangup(tty);
+ tty_kref_put(tty);
+ }
+ else
+ spin_unlock_irqrestore(&p->port.lock, flags);
+}
+
+static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
+ u16 __iomem *ip)
+{
+ struct tty_struct *tty = tty_port_tty_get(&p->port);
+ void __iomem *ofsAddr;
+ unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
+ u16 intr;
+
+ if (tty) {
+ if (test_bit(EMPTYWAIT, &p->statusflags) &&
+ MoxaPortTxQueue(p) == 0) {
+ clear_bit(EMPTYWAIT, &p->statusflags);
+ tty_wakeup(tty);
+ }
+ if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped &&
+ MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
+ clear_bit(LOWWAIT, &p->statusflags);
+ tty_wakeup(tty);
+ }
+
+ if (inited && !test_bit(TTY_THROTTLED, &tty->flags) &&
+ MoxaPortRxQueue(p) > 0) { /* RX */
+ MoxaPortReadData(p);
+ tty_schedule_flip(tty);
+ }
+ } else {
+ clear_bit(EMPTYWAIT, &p->statusflags);
+ MoxaPortFlushData(p, 0); /* flush RX */
+ }
+
+ if (!handle) /* nothing else to do */
+ goto put;
+
+ intr = readw(ip); /* port irq status */
+ if (intr == 0)
+ goto put;
+
+ writew(0, ip); /* ACK port */
+ ofsAddr = p->tableAddr;
+ if (intr & IntrTx) /* disable tx intr */
+ writew(readw(ofsAddr + HostStat) & ~WakeupTx,
+ ofsAddr + HostStat);
+
+ if (!inited)
+ goto put;
+
+ if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
+ tty_insert_flip_char(tty, 0, TTY_BREAK);
+ tty_schedule_flip(tty);
+ }
+
+ if (intr & IntrLine)
+ moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
+put:
+ tty_kref_put(tty);
+
+ return 0;
+}
+
+static void moxa_poll(unsigned long ignored)
+{
+ struct moxa_board_conf *brd;
+ u16 __iomem *ip;
+ unsigned int card, port, served = 0;
+
+ spin_lock(&moxa_lock);
+ for (card = 0; card < MAX_BOARDS; card++) {
+ brd = &moxa_boards[card];
+ if (!brd->ready)
+ continue;
+
+ served++;
+
+ ip = NULL;
+ if (readb(brd->intPend) == 0xff)
+ ip = brd->intTable + readb(brd->intNdx);
+
+ for (port = 0; port < brd->numPorts; port++)
+ moxa_poll_port(&brd->ports[port], !!ip, ip + port);
+
+ if (ip)
+ writeb(0, brd->intPend); /* ACK */
+
+ if (moxaLowWaterChk) {
+ struct moxa_port *p = brd->ports;
+ for (port = 0; port < brd->numPorts; port++, p++)
+ if (p->lowChkFlag) {
+ p->lowChkFlag = 0;
+ moxa_low_water_check(p->tableAddr);
+ }
+ }
+ }
+ moxaLowWaterChk = 0;
+
+ if (served)
+ mod_timer(&moxaTimer, jiffies + HZ / 50);
+ spin_unlock(&moxa_lock);
+}
+
+/******************************************************************************/
+
+static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
+{
+ register struct ktermios *ts = tty->termios;
+ struct moxa_port *ch = tty->driver_data;
+ int rts, cts, txflow, rxflow, xany, baud;
+
+ rts = cts = txflow = rxflow = xany = 0;
+ if (ts->c_cflag & CRTSCTS)
+ rts = cts = 1;
+ if (ts->c_iflag & IXON)
+ txflow = 1;
+ if (ts->c_iflag & IXOFF)
+ rxflow = 1;
+ if (ts->c_iflag & IXANY)
+ xany = 1;
+
+ /* Clear the features we don't support */
+ ts->c_cflag &= ~CMSPAR;
+ MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
+ baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
+ if (baud == -1)
+ baud = tty_termios_baud_rate(old_termios);
+ /* Not put the baud rate into the termios data */
+ tty_encode_baud_rate(tty, baud, baud);
+}
+
+/*****************************************************************************
+ * Driver level functions: *
+ *****************************************************************************/
+
+static void MoxaPortFlushData(struct moxa_port *port, int mode)
+{
+ void __iomem *ofsAddr;
+ if (mode < 0 || mode > 2)
+ return;
+ ofsAddr = port->tableAddr;
+ moxafunc(ofsAddr, FC_FlushQueue, mode);
+ if (mode != 1) {
+ port->lowChkFlag = 0;
+ moxa_low_water_check(ofsAddr);
+ }
+}
+
+/*
+ * Moxa Port Number Description:
+ *
+ * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
+ * the port number using in MOXA driver functions will be 0 to 31 for
+ * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
+ * to 127 for fourth. For example, if you setup three MOXA boards,
+ * first board is C218, second board is C320-16 and third board is
+ * C320-32. The port number of first board (C218 - 8 ports) is from
+ * 0 to 7. The port number of second board (C320 - 16 ports) is form
+ * 32 to 47. The port number of third board (C320 - 32 ports) is from
+ * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
+ * 127 will be invalid.
+ *
+ *
+ * Moxa Functions Description:
+ *
+ * Function 1: Driver initialization routine, this routine must be
+ * called when initialized driver.
+ * Syntax:
+ * void MoxaDriverInit();
+ *
+ *
+ * Function 2: Moxa driver private IOCTL command processing.
+ * Syntax:
+ * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
+ *
+ * unsigned int cmd : IOCTL command
+ * unsigned long arg : IOCTL argument
+ * int port : port number (0 - 127)
+ *
+ * return: 0 (OK)
+ * -EINVAL
+ * -ENOIOCTLCMD
+ *
+ *
+ * Function 6: Enable this port to start Tx/Rx data.
+ * Syntax:
+ * void MoxaPortEnable(int port);
+ * int port : port number (0 - 127)
+ *
+ *
+ * Function 7: Disable this port
+ * Syntax:
+ * void MoxaPortDisable(int port);
+ * int port : port number (0 - 127)
+ *
+ *
+ * Function 10: Setting baud rate of this port.
+ * Syntax:
+ * speed_t MoxaPortSetBaud(int port, speed_t baud);
+ * int port : port number (0 - 127)
+ * long baud : baud rate (50 - 115200)
+ *
+ * return: 0 : this port is invalid or baud < 50
+ * 50 - 115200 : the real baud rate set to the port, if
+ * the argument baud is large than maximun
+ * available baud rate, the real setting
+ * baud rate will be the maximun baud rate.
+ *
+ *
+ * Function 12: Configure the port.
+ * Syntax:
+ * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
+ * int port : port number (0 - 127)
+ * struct ktermios * termio : termio structure pointer
+ * speed_t baud : baud rate
+ *
+ * return: -1 : this port is invalid or termio == NULL
+ * 0 : setting O.K.
+ *
+ *
+ * Function 13: Get the DTR/RTS state of this port.
+ * Syntax:
+ * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
+ * int port : port number (0 - 127)
+ * int * dtrState : pointer to INT to receive the current DTR
+ * state. (if NULL, this function will not
+ * write to this address)
+ * int * rtsState : pointer to INT to receive the current RTS
+ * state. (if NULL, this function will not
+ * write to this address)
+ *
+ * return: -1 : this port is invalid
+ * 0 : O.K.
+ *
+ *
+ * Function 14: Setting the DTR/RTS output state of this port.
+ * Syntax:
+ * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
+ * int port : port number (0 - 127)
+ * int dtrState : DTR output state (0: off, 1: on)
+ * int rtsState : RTS output state (0: off, 1: on)
+ *
+ *
+ * Function 15: Setting the flow control of this port.
+ * Syntax:
+ * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
+ * int txFlow,int xany);
+ * int port : port number (0 - 127)
+ * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
+ * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
+ * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
+ * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
+ * int xany : S/W XANY flow control (0: no, 1: yes)
+ *
+ *
+ * Function 16: Get ths line status of this port
+ * Syntax:
+ * int MoxaPortLineStatus(int port);
+ * int port : port number (0 - 127)
+ *
+ * return: Bit 0 - CTS state (0: off, 1: on)
+ * Bit 1 - DSR state (0: off, 1: on)
+ * Bit 2 - DCD state (0: off, 1: on)
+ *
+ *
+ * Function 19: Flush the Rx/Tx buffer data of this port.
+ * Syntax:
+ * void MoxaPortFlushData(int port, int mode);
+ * int port : port number (0 - 127)
+ * int mode
+ * 0 : flush the Rx buffer
+ * 1 : flush the Tx buffer
+ * 2 : flush the Rx and Tx buffer
+ *
+ *
+ * Function 20: Write data.
+ * Syntax:
+ * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
+ * int port : port number (0 - 127)
+ * unsigned char * buffer : pointer to write data buffer.
+ * int length : write data length
+ *
+ * return: 0 - length : real write data length
+ *
+ *
+ * Function 21: Read data.
+ * Syntax:
+ * int MoxaPortReadData(int port, struct tty_struct *tty);
+ * int port : port number (0 - 127)
+ * struct tty_struct *tty : tty for data
+ *
+ * return: 0 - length : real read data length
+ *
+ *
+ * Function 24: Get the Tx buffer current queued data bytes
+ * Syntax:
+ * int MoxaPortTxQueue(int port);
+ * int port : port number (0 - 127)
+ *
+ * return: .. : Tx buffer current queued data bytes
+ *
+ *
+ * Function 25: Get the Tx buffer current free space
+ * Syntax:
+ * int MoxaPortTxFree(int port);
+ * int port : port number (0 - 127)
+ *
+ * return: .. : Tx buffer current free space
+ *
+ *
+ * Function 26: Get the Rx buffer current queued data bytes
+ * Syntax:
+ * int MoxaPortRxQueue(int port);
+ * int port : port number (0 - 127)
+ *
+ * return: .. : Rx buffer current queued data bytes
+ *
+ *
+ * Function 28: Disable port data transmission.
+ * Syntax:
+ * void MoxaPortTxDisable(int port);
+ * int port : port number (0 - 127)
+ *
+ *
+ * Function 29: Enable port data transmission.
+ * Syntax:
+ * void MoxaPortTxEnable(int port);
+ * int port : port number (0 - 127)
+ *
+ *
+ * Function 31: Get the received BREAK signal count and reset it.
+ * Syntax:
+ * int MoxaPortResetBrkCnt(int port);
+ * int port : port number (0 - 127)
+ *
+ * return: 0 - .. : BREAK signal count
+ *
+ *
+ */
+
+static void MoxaPortEnable(struct moxa_port *port)
+{
+ void __iomem *ofsAddr;
+ u16 lowwater = 512;
+
+ ofsAddr = port->tableAddr;
+ writew(lowwater, ofsAddr + Low_water);
+ if (MOXA_IS_320(port->board))
+ moxafunc(ofsAddr, FC_SetBreakIrq, 0);
+ else
+ writew(readw(ofsAddr + HostStat) | WakeupBreak,
+ ofsAddr + HostStat);
+
+ moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
+ moxafunc(ofsAddr, FC_FlushQueue, 2);
+
+ moxafunc(ofsAddr, FC_EnableCH, Magic_code);
+ MoxaPortLineStatus(port);
+}
+
+static void MoxaPortDisable(struct moxa_port *port)
+{
+ void __iomem *ofsAddr = port->tableAddr;
+
+ moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
+ moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
+ writew(0, ofsAddr + HostStat);
+ moxafunc(ofsAddr, FC_DisableCH, Magic_code);
+}
+
+static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
+{
+ void __iomem *ofsAddr = port->tableAddr;
+ unsigned int clock, val;
+ speed_t max;
+
+ max = MOXA_IS_320(port->board) ? 460800 : 921600;
+ if (baud < 50)
+ return 0;
+ if (baud > max)
+ baud = max;
+ clock = 921600;
+ val = clock / baud;
+ moxafunc(ofsAddr, FC_SetBaud, val);
+ baud = clock / val;
+ return baud;
+}
+
+static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
+ speed_t baud)
+{
+ void __iomem *ofsAddr;
+ tcflag_t cflag;
+ tcflag_t mode = 0;
+
+ ofsAddr = port->tableAddr;
+ cflag = termio->c_cflag; /* termio->c_cflag */
+
+ mode = termio->c_cflag & CSIZE;
+ if (mode == CS5)
+ mode = MX_CS5;
+ else if (mode == CS6)
+ mode = MX_CS6;
+ else if (mode == CS7)
+ mode = MX_CS7;
+ else if (mode == CS8)
+ mode = MX_CS8;
+
+ if (termio->c_cflag & CSTOPB) {
+ if (mode == MX_CS5)
+ mode |= MX_STOP15;
+ else
+ mode |= MX_STOP2;
+ } else
+ mode |= MX_STOP1;
+
+ if (termio->c_cflag & PARENB) {
+ if (termio->c_cflag & PARODD)
+ mode |= MX_PARODD;
+ else
+ mode |= MX_PAREVEN;
+ } else
+ mode |= MX_PARNONE;
+
+ moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
+
+ if (MOXA_IS_320(port->board) && baud >= 921600)
+ return -1;
+
+ baud = MoxaPortSetBaud(port, baud);
+
+ if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
+ spin_lock_irq(&moxafunc_lock);
+ writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
+ writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
+ writeb(FC_SetXonXoff, ofsAddr + FuncCode);
+ moxa_wait_finish(ofsAddr);
+ spin_unlock_irq(&moxafunc_lock);
+
+ }
+ return baud;
+}
+
+static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
+ int *rtsState)
+{
+ if (dtrState)
+ *dtrState = !!(port->lineCtrl & DTR_ON);
+ if (rtsState)
+ *rtsState = !!(port->lineCtrl & RTS_ON);
+
+ return 0;
+}
+
+static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
+{
+ u8 mode = 0;
+
+ if (dtr)
+ mode |= DTR_ON;
+ if (rts)
+ mode |= RTS_ON;
+ port->lineCtrl = mode;
+ moxafunc(port->tableAddr, FC_LineControl, mode);
+}
+
+static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
+ int txflow, int rxflow, int txany)
+{
+ int mode = 0;
+
+ if (rts)
+ mode |= RTS_FlowCtl;
+ if (cts)
+ mode |= CTS_FlowCtl;
+ if (txflow)
+ mode |= Tx_FlowCtl;
+ if (rxflow)
+ mode |= Rx_FlowCtl;
+ if (txany)
+ mode |= IXM_IXANY;
+ moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
+}
+
+static int MoxaPortLineStatus(struct moxa_port *port)
+{
+ void __iomem *ofsAddr;
+ int val;
+
+ ofsAddr = port->tableAddr;
+ if (MOXA_IS_320(port->board))
+ val = moxafuncret(ofsAddr, FC_LineStatus, 0);
+ else
+ val = readw(ofsAddr + FlagStat) >> 4;
+ val &= 0x0B;
+ if (val & 8)
+ val |= 4;
+ moxa_new_dcdstate(port, val & 8);
+ val &= 7;
+ return val;
+}
+
+static int MoxaPortWriteData(struct tty_struct *tty,
+ const unsigned char *buffer, int len)
+{
+ struct moxa_port *port = tty->driver_data;
+ void __iomem *baseAddr, *ofsAddr, *ofs;
+ unsigned int c, total;
+ u16 head, tail, tx_mask, spage, epage;
+ u16 pageno, pageofs, bufhead;
+
+ ofsAddr = port->tableAddr;
+ baseAddr = port->board->basemem;
+ tx_mask = readw(ofsAddr + TX_mask);
+ spage = readw(ofsAddr + Page_txb);
+ epage = readw(ofsAddr + EndPage_txb);
+ tail = readw(ofsAddr + TXwptr);
+ head = readw(ofsAddr + TXrptr);
+ c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
+ if (c > len)
+ c = len;
+ moxaLog.txcnt[port->port.tty->index] += c;
+ total = c;
+ if (spage == epage) {
+ bufhead = readw(ofsAddr + Ofs_txb);
+ writew(spage, baseAddr + Control_reg);
+ while (c > 0) {
+ if (head > tail)
+ len = head - tail - 1;
+ else
+ len = tx_mask + 1 - tail;
+ len = (c > len) ? len : c;
+ ofs = baseAddr + DynPage_addr + bufhead + tail;
+ memcpy_toio(ofs, buffer, len);
+ buffer += len;
+ tail = (tail + len) & tx_mask;
+ c -= len;
+ }
+ } else {
+ pageno = spage + (tail >> 13);
+ pageofs = tail & Page_mask;
+ while (c > 0) {
+ len = Page_size - pageofs;
+ if (len > c)
+ len = c;
+ writeb(pageno, baseAddr + Control_reg);
+ ofs = baseAddr + DynPage_addr + pageofs;
+ memcpy_toio(ofs, buffer, len);
+ buffer += len;
+ if (++pageno == epage)
+ pageno = spage;
+ pageofs = 0;
+ c -= len;
+ }
+ tail = (tail + total) & tx_mask;
+ }
+ writew(tail, ofsAddr + TXwptr);
+ writeb(1, ofsAddr + CD180TXirq); /* start to send */
+ return total;
+}
+
+static int MoxaPortReadData(struct moxa_port *port)
+{
+ struct tty_struct *tty = port->port.tty;
+ unsigned char *dst;
+ void __iomem *baseAddr, *ofsAddr, *ofs;
+ unsigned int count, len, total;
+ u16 tail, rx_mask, spage, epage;
+ u16 pageno, pageofs, bufhead, head;
+
+ ofsAddr = port->tableAddr;
+ baseAddr = port->board->basemem;
+ head = readw(ofsAddr + RXrptr);
+ tail = readw(ofsAddr + RXwptr);
+ rx_mask = readw(ofsAddr + RX_mask);
+ spage = readw(ofsAddr + Page_rxb);
+ epage = readw(ofsAddr + EndPage_rxb);
+ count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
+ if (count == 0)
+ return 0;
+
+ total = count;
+ moxaLog.rxcnt[tty->index] += total;
+ if (spage == epage) {
+ bufhead = readw(ofsAddr + Ofs_rxb);
+ writew(spage, baseAddr + Control_reg);
+ while (count > 0) {
+ ofs = baseAddr + DynPage_addr + bufhead + head;
+ len = (tail >= head) ? (tail - head) :
+ (rx_mask + 1 - head);
+ len = tty_prepare_flip_string(tty, &dst,
+ min(len, count));
+ memcpy_fromio(dst, ofs, len);
+ head = (head + len) & rx_mask;
+ count -= len;
+ }
+ } else {
+ pageno = spage + (head >> 13);
+ pageofs = head & Page_mask;
+ while (count > 0) {
+ writew(pageno, baseAddr + Control_reg);
+ ofs = baseAddr + DynPage_addr + pageofs;
+ len = tty_prepare_flip_string(tty, &dst,
+ min(Page_size - pageofs, count));
+ memcpy_fromio(dst, ofs, len);
+
+ count -= len;
+ pageofs = (pageofs + len) & Page_mask;
+ if (pageofs == 0 && ++pageno == epage)
+ pageno = spage;
+ }
+ head = (head + total) & rx_mask;
+ }
+ writew(head, ofsAddr + RXrptr);
+ if (readb(ofsAddr + FlagStat) & Xoff_state) {
+ moxaLowWaterChk = 1;
+ port->lowChkFlag = 1;
+ }
+ return total;
+}
+
+
+static int MoxaPortTxQueue(struct moxa_port *port)
+{
+ void __iomem *ofsAddr = port->tableAddr;
+ u16 rptr, wptr, mask;
+
+ rptr = readw(ofsAddr + TXrptr);
+ wptr = readw(ofsAddr + TXwptr);
+ mask = readw(ofsAddr + TX_mask);
+ return (wptr - rptr) & mask;
+}
+
+static int MoxaPortTxFree(struct moxa_port *port)
+{
+ void __iomem *ofsAddr = port->tableAddr;
+ u16 rptr, wptr, mask;
+
+ rptr = readw(ofsAddr + TXrptr);
+ wptr = readw(ofsAddr + TXwptr);
+ mask = readw(ofsAddr + TX_mask);
+ return mask - ((wptr - rptr) & mask);
+}
+
+static int MoxaPortRxQueue(struct moxa_port *port)
+{
+ void __iomem *ofsAddr = port->tableAddr;
+ u16 rptr, wptr, mask;
+
+ rptr = readw(ofsAddr + RXrptr);
+ wptr = readw(ofsAddr + RXwptr);
+ mask = readw(ofsAddr + RX_mask);
+ return (wptr - rptr) & mask;
+}
+
+static void MoxaPortTxDisable(struct moxa_port *port)
+{
+ moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
+}
+
+static void MoxaPortTxEnable(struct moxa_port *port)
+{
+ moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
+}
+
+static int moxa_get_serial_info(struct moxa_port *info,
+ struct serial_struct __user *retinfo)
+{
+ struct serial_struct tmp = {
+ .type = info->type,
+ .line = info->port.tty->index,
+ .flags = info->port.flags,
+ .baud_base = 921600,
+ .close_delay = info->port.close_delay
+ };
+ return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
+}
+
+
+static int moxa_set_serial_info(struct moxa_port *info,
+ struct serial_struct __user *new_info)
+{
+ struct serial_struct new_serial;
+
+ if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
+ return -EFAULT;
+
+ if (new_serial.irq != 0 || new_serial.port != 0 ||
+ new_serial.custom_divisor != 0 ||
+ new_serial.baud_base != 921600)
+ return -EPERM;
+
+ if (!capable(CAP_SYS_ADMIN)) {
+ if (((new_serial.flags & ~ASYNC_USR_MASK) !=
+ (info->port.flags & ~ASYNC_USR_MASK)))
+ return -EPERM;
+ } else
+ info->port.close_delay = new_serial.close_delay * HZ / 100;
+
+ new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
+ new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
+
+ MoxaSetFifo(info, new_serial.type == PORT_16550A);
+
+ info->type = new_serial.type;
+ return 0;
+}
+
+
+
+/*****************************************************************************
+ * Static local functions: *
+ *****************************************************************************/
+
+static void MoxaSetFifo(struct moxa_port *port, int enable)
+{
+ void __iomem *ofsAddr = port->tableAddr;
+
+ if (!enable) {
+ moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
+ moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
+ } else {
+ moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
+ moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
+ }
+}
--- /dev/null
+#ifndef MOXA_H_FILE
+#define MOXA_H_FILE
+
+#define MOXA 0x400
+#define MOXA_GET_IQUEUE (MOXA + 1) /* get input buffered count */
+#define MOXA_GET_OQUEUE (MOXA + 2) /* get output buffered count */
+#define MOXA_GETDATACOUNT (MOXA + 23)
+#define MOXA_GET_IOQUEUE (MOXA + 27)
+#define MOXA_FLUSH_QUEUE (MOXA + 28)
+#define MOXA_GETMSTATUS (MOXA + 65)
+
+/*
+ * System Configuration
+ */
+
+#define Magic_code 0x404
+
+/*
+ * for C218 BIOS initialization
+ */
+#define C218_ConfBase 0x800
+#define C218_status (C218_ConfBase + 0) /* BIOS running status */
+#define C218_diag (C218_ConfBase + 2) /* diagnostic status */
+#define C218_key (C218_ConfBase + 4) /* WORD (0x218 for C218) */
+#define C218DLoad_len (C218_ConfBase + 6) /* WORD */
+#define C218check_sum (C218_ConfBase + 8) /* BYTE */
+#define C218chksum_ok (C218_ConfBase + 0x0a) /* BYTE (1:ok) */
+#define C218_TestRx (C218_ConfBase + 0x10) /* 8 bytes for 8 ports */
+#define C218_TestTx (C218_ConfBase + 0x18) /* 8 bytes for 8 ports */
+#define C218_RXerr (C218_ConfBase + 0x20) /* 8 bytes for 8 ports */
+#define C218_ErrFlag (C218_ConfBase + 0x28) /* 8 bytes for 8 ports */
+
+#define C218_LoadBuf 0x0F00
+#define C218_KeyCode 0x218
+#define CP204J_KeyCode 0x204
+
+/*
+ * for C320 BIOS initialization
+ */
+#define C320_ConfBase 0x800
+#define C320_LoadBuf 0x0f00
+#define STS_init 0x05 /* for C320_status */
+
+#define C320_status C320_ConfBase + 0 /* BIOS running status */
+#define C320_diag C320_ConfBase + 2 /* diagnostic status */
+#define C320_key C320_ConfBase + 4 /* WORD (0320H for C320) */
+#define C320DLoad_len C320_ConfBase + 6 /* WORD */
+#define C320check_sum C320_ConfBase + 8 /* WORD */
+#define C320chksum_ok C320_ConfBase + 0x0a /* WORD (1:ok) */
+#define C320bapi_len C320_ConfBase + 0x0c /* WORD */
+#define C320UART_no C320_ConfBase + 0x0e /* WORD */
+
+#define C320_KeyCode 0x320
+
+#define FixPage_addr 0x0000 /* starting addr of static page */
+#define DynPage_addr 0x2000 /* starting addr of dynamic page */
+#define C218_start 0x3000 /* starting addr of C218 BIOS prg */
+#define Control_reg 0x1ff0 /* select page and reset control */
+#define HW_reset 0x80
+
+/*
+ * Function Codes
+ */
+#define FC_CardReset 0x80
+#define FC_ChannelReset 1 /* C320 firmware not supported */
+#define FC_EnableCH 2
+#define FC_DisableCH 3
+#define FC_SetParam 4
+#define FC_SetMode 5
+#define FC_SetRate 6
+#define FC_LineControl 7
+#define FC_LineStatus 8
+#define FC_XmitControl 9
+#define FC_FlushQueue 10
+#define FC_SendBreak 11
+#define FC_StopBreak 12
+#define FC_LoopbackON 13
+#define FC_LoopbackOFF 14
+#define FC_ClrIrqTable 15
+#define FC_SendXon 16
+#define FC_SetTermIrq 17 /* C320 firmware not supported */
+#define FC_SetCntIrq 18 /* C320 firmware not supported */
+#define FC_SetBreakIrq 19
+#define FC_SetLineIrq 20
+#define FC_SetFlowCtl 21
+#define FC_GenIrq 22
+#define FC_InCD180 23
+#define FC_OutCD180 24
+#define FC_InUARTreg 23
+#define FC_OutUARTreg 24
+#define FC_SetXonXoff 25
+#define FC_OutCD180CCR 26
+#define FC_ExtIQueue 27
+#define FC_ExtOQueue 28
+#define FC_ClrLineIrq 29
+#define FC_HWFlowCtl 30
+#define FC_GetClockRate 35
+#define FC_SetBaud 36
+#define FC_SetDataMode 41
+#define FC_GetCCSR 43
+#define FC_GetDataError 45
+#define FC_RxControl 50
+#define FC_ImmSend 51
+#define FC_SetXonState 52
+#define FC_SetXoffState 53
+#define FC_SetRxFIFOTrig 54
+#define FC_SetTxFIFOCnt 55
+#define FC_UnixRate 56
+#define FC_UnixResetTimer 57
+
+#define RxFIFOTrig1 0
+#define RxFIFOTrig4 1
+#define RxFIFOTrig8 2
+#define RxFIFOTrig14 3
+
+/*
+ * Dual-Ported RAM
+ */
+#define DRAM_global 0
+#define INT_data (DRAM_global + 0)
+#define Config_base (DRAM_global + 0x108)
+
+#define IRQindex (INT_data + 0)
+#define IRQpending (INT_data + 4)
+#define IRQtable (INT_data + 8)
+
+/*
+ * Interrupt Status
+ */
+#define IntrRx 0x01 /* receiver data O.K. */
+#define IntrTx 0x02 /* transmit buffer empty */
+#define IntrFunc 0x04 /* function complete */
+#define IntrBreak 0x08 /* received break */
+#define IntrLine 0x10 /* line status change
+ for transmitter */
+#define IntrIntr 0x20 /* received INTR code */
+#define IntrQuit 0x40 /* received QUIT code */
+#define IntrEOF 0x80 /* received EOF code */
+
+#define IntrRxTrigger 0x100 /* rx data count reach tigger value */
+#define IntrTxTrigger 0x200 /* tx data count below trigger value */
+
+#define Magic_no (Config_base + 0)
+#define Card_model_no (Config_base + 2)
+#define Total_ports (Config_base + 4)
+#define Module_cnt (Config_base + 8)
+#define Module_no (Config_base + 10)
+#define Timer_10ms (Config_base + 14)
+#define Disable_IRQ (Config_base + 20)
+#define TMS320_PORT1 (Config_base + 22)
+#define TMS320_PORT2 (Config_base + 24)
+#define TMS320_CLOCK (Config_base + 26)
+
+/*
+ * DATA BUFFER in DRAM
+ */
+#define Extern_table 0x400 /* Base address of the external table
+ (24 words * 64) total 3K bytes
+ (24 words * 128) total 6K bytes */
+#define Extern_size 0x60 /* 96 bytes */
+#define RXrptr 0x00 /* read pointer for RX buffer */
+#define RXwptr 0x02 /* write pointer for RX buffer */
+#define TXrptr 0x04 /* read pointer for TX buffer */
+#define TXwptr 0x06 /* write pointer for TX buffer */
+#define HostStat 0x08 /* IRQ flag and general flag */
+#define FlagStat 0x0A
+#define FlowControl 0x0C /* B7 B6 B5 B4 B3 B2 B1 B0 */
+ /* x x x x | | | | */
+ /* | | | + CTS flow */
+ /* | | +--- RTS flow */
+ /* | +------ TX Xon/Xoff */
+ /* +--------- RX Xon/Xoff */
+#define Break_cnt 0x0E /* received break count */
+#define CD180TXirq 0x10 /* if non-0: enable TX irq */
+#define RX_mask 0x12
+#define TX_mask 0x14
+#define Ofs_rxb 0x16
+#define Ofs_txb 0x18
+#define Page_rxb 0x1A
+#define Page_txb 0x1C
+#define EndPage_rxb 0x1E
+#define EndPage_txb 0x20
+#define Data_error 0x22
+#define RxTrigger 0x28
+#define TxTrigger 0x2a
+
+#define rRXwptr 0x34
+#define Low_water 0x36
+
+#define FuncCode 0x40
+#define FuncArg 0x42
+#define FuncArg1 0x44
+
+#define C218rx_size 0x2000 /* 8K bytes */
+#define C218tx_size 0x8000 /* 32K bytes */
+
+#define C218rx_mask (C218rx_size - 1)
+#define C218tx_mask (C218tx_size - 1)
+
+#define C320p8rx_size 0x2000
+#define C320p8tx_size 0x8000
+#define C320p8rx_mask (C320p8rx_size - 1)
+#define C320p8tx_mask (C320p8tx_size - 1)
+
+#define C320p16rx_size 0x2000
+#define C320p16tx_size 0x4000
+#define C320p16rx_mask (C320p16rx_size - 1)
+#define C320p16tx_mask (C320p16tx_size - 1)
+
+#define C320p24rx_size 0x2000
+#define C320p24tx_size 0x2000
+#define C320p24rx_mask (C320p24rx_size - 1)
+#define C320p24tx_mask (C320p24tx_size - 1)
+
+#define C320p32rx_size 0x1000
+#define C320p32tx_size 0x1000
+#define C320p32rx_mask (C320p32rx_size - 1)
+#define C320p32tx_mask (C320p32tx_size - 1)
+
+#define Page_size 0x2000U
+#define Page_mask (Page_size - 1)
+#define C218rx_spage 3
+#define C218tx_spage 4
+#define C218rx_pageno 1
+#define C218tx_pageno 4
+#define C218buf_pageno 5
+
+#define C320p8rx_spage 3
+#define C320p8tx_spage 4
+#define C320p8rx_pgno 1
+#define C320p8tx_pgno 4
+#define C320p8buf_pgno 5
+
+#define C320p16rx_spage 3
+#define C320p16tx_spage 4
+#define C320p16rx_pgno 1
+#define C320p16tx_pgno 2
+#define C320p16buf_pgno 3
+
+#define C320p24rx_spage 3
+#define C320p24tx_spage 4
+#define C320p24rx_pgno 1
+#define C320p24tx_pgno 1
+#define C320p24buf_pgno 2
+
+#define C320p32rx_spage 3
+#define C320p32tx_ofs C320p32rx_size
+#define C320p32tx_spage 3
+#define C320p32buf_pgno 1
+
+/*
+ * Host Status
+ */
+#define WakeupRx 0x01
+#define WakeupTx 0x02
+#define WakeupBreak 0x08
+#define WakeupLine 0x10
+#define WakeupIntr 0x20
+#define WakeupQuit 0x40
+#define WakeupEOF 0x80 /* used in VTIME control */
+#define WakeupRxTrigger 0x100
+#define WakeupTxTrigger 0x200
+/*
+ * Flag status
+ */
+#define Rx_over 0x01
+#define Xoff_state 0x02
+#define Tx_flowOff 0x04
+#define Tx_enable 0x08
+#define CTS_state 0x10
+#define DSR_state 0x20
+#define DCD_state 0x80
+/*
+ * FlowControl
+ */
+#define CTS_FlowCtl 1
+#define RTS_FlowCtl 2
+#define Tx_FlowCtl 4
+#define Rx_FlowCtl 8
+#define IXM_IXANY 0x10
+
+#define LowWater 128
+
+#define DTR_ON 1
+#define RTS_ON 2
+#define CTS_ON 1
+#define DSR_ON 2
+#define DCD_ON 8
+
+/* mode definition */
+#define MX_CS8 0x03
+#define MX_CS7 0x02
+#define MX_CS6 0x01
+#define MX_CS5 0x00
+
+#define MX_STOP1 0x00
+#define MX_STOP15 0x04
+#define MX_STOP2 0x08
+
+#define MX_PARNONE 0x00
+#define MX_PAREVEN 0x40
+#define MX_PARODD 0xC0
+
+#endif
--- /dev/null
+/*
+ * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
+ *
+ * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com).
+ * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com>
+ *
+ * This code is loosely based on the 1.8 moxa driver which is based on
+ * Linux serial driver, written by Linus Torvalds, Theodore T'so and
+ * others.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
+ * <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
+ * www.moxa.com.
+ * - Fixed x86_64 cleanness
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/serial_reg.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+
+#include "mxser.h"
+
+#define MXSER_VERSION "2.0.5" /* 1.14 */
+#define MXSERMAJOR 174
+
+#define MXSER_BOARDS 4 /* Max. boards */
+#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
+#define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
+#define MXSER_ISR_PASS_LIMIT 100
+
+/*CheckIsMoxaMust return value*/
+#define MOXA_OTHER_UART 0x00
+#define MOXA_MUST_MU150_HWID 0x01
+#define MOXA_MUST_MU860_HWID 0x02
+
+#define WAKEUP_CHARS 256
+
+#define UART_MCR_AFE 0x20
+#define UART_LSR_SPECIAL 0x1E
+
+#define PCI_DEVICE_ID_POS104UL 0x1044
+#define PCI_DEVICE_ID_CB108 0x1080
+#define PCI_DEVICE_ID_CP102UF 0x1023
+#define PCI_DEVICE_ID_CP112UL 0x1120
+#define PCI_DEVICE_ID_CB114 0x1142
+#define PCI_DEVICE_ID_CP114UL 0x1143
+#define PCI_DEVICE_ID_CB134I 0x1341
+#define PCI_DEVICE_ID_CP138U 0x1380
+
+
+#define C168_ASIC_ID 1
+#define C104_ASIC_ID 2
+#define C102_ASIC_ID 0xB
+#define CI132_ASIC_ID 4
+#define CI134_ASIC_ID 3
+#define CI104J_ASIC_ID 5
+
+#define MXSER_HIGHBAUD 1
+#define MXSER_HAS2 2
+
+/* This is only for PCI */
+static const struct {
+ int type;
+ int tx_fifo;
+ int rx_fifo;
+ int xmit_fifo_size;
+ int rx_high_water;
+ int rx_trigger;
+ int rx_low_water;
+ long max_baud;
+} Gpci_uart_info[] = {
+ {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
+ {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
+ {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
+};
+#define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
+
+struct mxser_cardinfo {
+ char *name;
+ unsigned int nports;
+ unsigned int flags;
+};
+
+static const struct mxser_cardinfo mxser_cards[] = {
+/* 0*/ { "C168 series", 8, },
+ { "C104 series", 4, },
+ { "CI-104J series", 4, },
+ { "C168H/PCI series", 8, },
+ { "C104H/PCI series", 4, },
+/* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
+ { "CI-132 series", 4, MXSER_HAS2 },
+ { "CI-134 series", 4, },
+ { "CP-132 series", 2, },
+ { "CP-114 series", 4, },
+/*10*/ { "CT-114 series", 4, },
+ { "CP-102 series", 2, MXSER_HIGHBAUD },
+ { "CP-104U series", 4, },
+ { "CP-168U series", 8, },
+ { "CP-132U series", 2, },
+/*15*/ { "CP-134U series", 4, },
+ { "CP-104JU series", 4, },
+ { "Moxa UC7000 Serial", 8, }, /* RC7000 */
+ { "CP-118U series", 8, },
+ { "CP-102UL series", 2, },
+/*20*/ { "CP-102U series", 2, },
+ { "CP-118EL series", 8, },
+ { "CP-168EL series", 8, },
+ { "CP-104EL series", 4, },
+ { "CB-108 series", 8, },
+/*25*/ { "CB-114 series", 4, },
+ { "CB-134I series", 4, },
+ { "CP-138U series", 8, },
+ { "POS-104UL series", 4, },
+ { "CP-114UL series", 4, },
+/*30*/ { "CP-102UF series", 2, },
+ { "CP-112UL series", 2, },
+};
+
+/* driver_data correspond to the lines in the structure above
+ see also ISA probe function before you change something */
+static struct pci_device_id mxser_pcibrds[] = {
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
+ { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 },
+ { }
+};
+MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
+
+static unsigned long ioaddr[MXSER_BOARDS];
+static int ttymajor = MXSERMAJOR;
+
+/* Variables for insmod */
+
+MODULE_AUTHOR("Casper Yang");
+MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
+module_param_array(ioaddr, ulong, NULL, 0);
+MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
+module_param(ttymajor, int, 0);
+MODULE_LICENSE("GPL");
+
+struct mxser_log {
+ int tick;
+ unsigned long rxcnt[MXSER_PORTS];
+ unsigned long txcnt[MXSER_PORTS];
+};
+
+struct mxser_mon {
+ unsigned long rxcnt;
+ unsigned long txcnt;
+ unsigned long up_rxcnt;
+ unsigned long up_txcnt;
+ int modem_status;
+ unsigned char hold_reason;
+};
+
+struct mxser_mon_ext {
+ unsigned long rx_cnt[32];
+ unsigned long tx_cnt[32];
+ unsigned long up_rxcnt[32];
+ unsigned long up_txcnt[32];
+ int modem_status[32];
+
+ long baudrate[32];
+ int databits[32];
+ int stopbits[32];
+ int parity[32];
+ int flowctrl[32];
+ int fifo[32];
+ int iftype[32];
+};
+
+struct mxser_board;
+
+struct mxser_port {
+ struct tty_port port;
+ struct mxser_board *board;
+
+ unsigned long ioaddr;
+ unsigned long opmode_ioaddr;
+ int max_baud;
+
+ int rx_high_water;
+ int rx_trigger; /* Rx fifo trigger level */
+ int rx_low_water;
+ int baud_base; /* max. speed */
+ int type; /* UART type */
+
+ int x_char; /* xon/xoff character */
+ int IER; /* Interrupt Enable Register */
+ int MCR; /* Modem control register */
+
+ unsigned char stop_rx;
+ unsigned char ldisc_stop_rx;
+
+ int custom_divisor;
+ unsigned char err_shadow;
+
+ struct async_icount icount; /* kernel counters for 4 input interrupts */
+ int timeout;
+
+ int read_status_mask;
+ int ignore_status_mask;
+ int xmit_fifo_size;
+ int xmit_head;
+ int xmit_tail;
+ int xmit_cnt;
+
+ struct ktermios normal_termios;
+
+ struct mxser_mon mon_data;
+
+ spinlock_t slock;
+};
+
+struct mxser_board {
+ unsigned int idx;
+ int irq;
+ const struct mxser_cardinfo *info;
+ unsigned long vector;
+ unsigned long vector_mask;
+
+ int chip_flag;
+ int uart_type;
+
+ struct mxser_port ports[MXSER_PORTS_PER_BOARD];
+};
+
+struct mxser_mstatus {
+ tcflag_t cflag;
+ int cts;
+ int dsr;
+ int ri;
+ int dcd;
+};
+
+static struct mxser_board mxser_boards[MXSER_BOARDS];
+static struct tty_driver *mxvar_sdriver;
+static struct mxser_log mxvar_log;
+static int mxser_set_baud_method[MXSER_PORTS + 1];
+
+static void mxser_enable_must_enchance_mode(unsigned long baseio)
+{
+ u8 oldlcr;
+ u8 efr;
+
+ oldlcr = inb(baseio + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
+
+ efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
+ efr |= MOXA_MUST_EFR_EFRB_ENABLE;
+
+ outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ outb(oldlcr, baseio + UART_LCR);
+}
+
+#ifdef CONFIG_PCI
+static void mxser_disable_must_enchance_mode(unsigned long baseio)
+{
+ u8 oldlcr;
+ u8 efr;
+
+ oldlcr = inb(baseio + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
+
+ efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
+ efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
+
+ outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ outb(oldlcr, baseio + UART_LCR);
+}
+#endif
+
+static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
+{
+ u8 oldlcr;
+ u8 efr;
+
+ oldlcr = inb(baseio + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
+
+ efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
+ efr &= ~MOXA_MUST_EFR_BANK_MASK;
+ efr |= MOXA_MUST_EFR_BANK0;
+
+ outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ outb(value, baseio + MOXA_MUST_XON1_REGISTER);
+ outb(oldlcr, baseio + UART_LCR);
+}
+
+static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
+{
+ u8 oldlcr;
+ u8 efr;
+
+ oldlcr = inb(baseio + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
+
+ efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
+ efr &= ~MOXA_MUST_EFR_BANK_MASK;
+ efr |= MOXA_MUST_EFR_BANK0;
+
+ outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
+ outb(oldlcr, baseio + UART_LCR);
+}
+
+static void mxser_set_must_fifo_value(struct mxser_port *info)
+{
+ u8 oldlcr;
+ u8 efr;
+
+ oldlcr = inb(info->ioaddr + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
+
+ efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
+ efr &= ~MOXA_MUST_EFR_BANK_MASK;
+ efr |= MOXA_MUST_EFR_BANK1;
+
+ outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
+ outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
+ outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
+ outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
+ outb(oldlcr, info->ioaddr + UART_LCR);
+}
+
+static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
+{
+ u8 oldlcr;
+ u8 efr;
+
+ oldlcr = inb(baseio + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
+
+ efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
+ efr &= ~MOXA_MUST_EFR_BANK_MASK;
+ efr |= MOXA_MUST_EFR_BANK2;
+
+ outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
+ outb(oldlcr, baseio + UART_LCR);
+}
+
+#ifdef CONFIG_PCI
+static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
+{
+ u8 oldlcr;
+ u8 efr;
+
+ oldlcr = inb(baseio + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
+
+ efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
+ efr &= ~MOXA_MUST_EFR_BANK_MASK;
+ efr |= MOXA_MUST_EFR_BANK2;
+
+ outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
+ outb(oldlcr, baseio + UART_LCR);
+}
+#endif
+
+static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
+{
+ u8 oldlcr;
+ u8 efr;
+
+ oldlcr = inb(baseio + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
+
+ efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
+ efr &= ~MOXA_MUST_EFR_SF_MASK;
+
+ outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ outb(oldlcr, baseio + UART_LCR);
+}
+
+static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
+{
+ u8 oldlcr;
+ u8 efr;
+
+ oldlcr = inb(baseio + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
+
+ efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
+ efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
+ efr |= MOXA_MUST_EFR_SF_TX1;
+
+ outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ outb(oldlcr, baseio + UART_LCR);
+}
+
+static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
+{
+ u8 oldlcr;
+ u8 efr;
+
+ oldlcr = inb(baseio + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
+
+ efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
+ efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
+
+ outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ outb(oldlcr, baseio + UART_LCR);
+}
+
+static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
+{
+ u8 oldlcr;
+ u8 efr;
+
+ oldlcr = inb(baseio + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
+
+ efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
+ efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
+ efr |= MOXA_MUST_EFR_SF_RX1;
+
+ outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ outb(oldlcr, baseio + UART_LCR);
+}
+
+static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
+{
+ u8 oldlcr;
+ u8 efr;
+
+ oldlcr = inb(baseio + UART_LCR);
+ outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
+
+ efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
+ efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
+
+ outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
+ outb(oldlcr, baseio + UART_LCR);
+}
+
+#ifdef CONFIG_PCI
+static int __devinit CheckIsMoxaMust(unsigned long io)
+{
+ u8 oldmcr, hwid;
+ int i;
+
+ outb(0, io + UART_LCR);
+ mxser_disable_must_enchance_mode(io);
+ oldmcr = inb(io + UART_MCR);
+ outb(0, io + UART_MCR);
+ mxser_set_must_xon1_value(io, 0x11);
+ if ((hwid = inb(io + UART_MCR)) != 0) {
+ outb(oldmcr, io + UART_MCR);
+ return MOXA_OTHER_UART;
+ }
+
+ mxser_get_must_hardware_id(io, &hwid);
+ for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
+ if (hwid == Gpci_uart_info[i].type)
+ return (int)hwid;
+ }
+ return MOXA_OTHER_UART;
+}
+#endif
+
+static void process_txrx_fifo(struct mxser_port *info)
+{
+ int i;
+
+ if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
+ info->rx_trigger = 1;
+ info->rx_high_water = 1;
+ info->rx_low_water = 1;
+ info->xmit_fifo_size = 1;
+ } else
+ for (i = 0; i < UART_INFO_NUM; i++)
+ if (info->board->chip_flag == Gpci_uart_info[i].type) {
+ info->rx_trigger = Gpci_uart_info[i].rx_trigger;
+ info->rx_low_water = Gpci_uart_info[i].rx_low_water;
+ info->rx_high_water = Gpci_uart_info[i].rx_high_water;
+ info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
+ break;
+ }
+}
+
+static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
+{
+ static unsigned char mxser_msr[MXSER_PORTS + 1];
+ unsigned char status = 0;
+
+ status = inb(baseaddr + UART_MSR);
+
+ mxser_msr[port] &= 0x0F;
+ mxser_msr[port] |= status;
+ status = mxser_msr[port];
+ if (mode)
+ mxser_msr[port] = 0;
+
+ return status;
+}
+
+static int mxser_carrier_raised(struct tty_port *port)
+{
+ struct mxser_port *mp = container_of(port, struct mxser_port, port);
+ return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
+}
+
+static void mxser_dtr_rts(struct tty_port *port, int on)
+{
+ struct mxser_port *mp = container_of(port, struct mxser_port, port);
+ unsigned long flags;
+
+ spin_lock_irqsave(&mp->slock, flags);
+ if (on)
+ outb(inb(mp->ioaddr + UART_MCR) |
+ UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
+ else
+ outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
+ mp->ioaddr + UART_MCR);
+ spin_unlock_irqrestore(&mp->slock, flags);
+}
+
+static int mxser_set_baud(struct tty_struct *tty, long newspd)
+{
+ struct mxser_port *info = tty->driver_data;
+ int quot = 0, baud;
+ unsigned char cval;
+
+ if (!info->ioaddr)
+ return -1;
+
+ if (newspd > info->max_baud)
+ return -1;
+
+ if (newspd == 134) {
+ quot = 2 * info->baud_base / 269;
+ tty_encode_baud_rate(tty, 134, 134);
+ } else if (newspd) {
+ quot = info->baud_base / newspd;
+ if (quot == 0)
+ quot = 1;
+ baud = info->baud_base/quot;
+ tty_encode_baud_rate(tty, baud, baud);
+ } else {
+ quot = 0;
+ }
+
+ info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
+ info->timeout += HZ / 50; /* Add .02 seconds of slop */
+
+ if (quot) {
+ info->MCR |= UART_MCR_DTR;
+ outb(info->MCR, info->ioaddr + UART_MCR);
+ } else {
+ info->MCR &= ~UART_MCR_DTR;
+ outb(info->MCR, info->ioaddr + UART_MCR);
+ return 0;
+ }
+
+ cval = inb(info->ioaddr + UART_LCR);
+
+ outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
+
+ outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
+ outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
+ outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
+
+#ifdef BOTHER
+ if (C_BAUD(tty) == BOTHER) {
+ quot = info->baud_base % newspd;
+ quot *= 8;
+ if (quot % newspd > newspd / 2) {
+ quot /= newspd;
+ quot++;
+ } else
+ quot /= newspd;
+
+ mxser_set_must_enum_value(info->ioaddr, quot);
+ } else
+#endif
+ mxser_set_must_enum_value(info->ioaddr, 0);
+
+ return 0;
+}
+
+/*
+ * This routine is called to set the UART divisor registers to match
+ * the specified baud rate for a serial port.
+ */
+static int mxser_change_speed(struct tty_struct *tty,
+ struct ktermios *old_termios)
+{
+ struct mxser_port *info = tty->driver_data;
+ unsigned cflag, cval, fcr;
+ int ret = 0;
+ unsigned char status;
+
+ cflag = tty->termios->c_cflag;
+ if (!info->ioaddr)
+ return ret;
+
+ if (mxser_set_baud_method[tty->index] == 0)
+ mxser_set_baud(tty, tty_get_baud_rate(tty));
+
+ /* byte size and parity */
+ switch (cflag & CSIZE) {
+ case CS5:
+ cval = 0x00;
+ break;
+ case CS6:
+ cval = 0x01;
+ break;
+ case CS7:
+ cval = 0x02;
+ break;
+ case CS8:
+ cval = 0x03;
+ break;
+ default:
+ cval = 0x00;
+ break; /* too keep GCC shut... */
+ }
+ if (cflag & CSTOPB)
+ cval |= 0x04;
+ if (cflag & PARENB)
+ cval |= UART_LCR_PARITY;
+ if (!(cflag & PARODD))
+ cval |= UART_LCR_EPAR;
+ if (cflag & CMSPAR)
+ cval |= UART_LCR_SPAR;
+
+ if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
+ if (info->board->chip_flag) {
+ fcr = UART_FCR_ENABLE_FIFO;
+ fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
+ mxser_set_must_fifo_value(info);
+ } else
+ fcr = 0;
+ } else {
+ fcr = UART_FCR_ENABLE_FIFO;
+ if (info->board->chip_flag) {
+ fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
+ mxser_set_must_fifo_value(info);
+ } else {
+ switch (info->rx_trigger) {
+ case 1:
+ fcr |= UART_FCR_TRIGGER_1;
+ break;
+ case 4:
+ fcr |= UART_FCR_TRIGGER_4;
+ break;
+ case 8:
+ fcr |= UART_FCR_TRIGGER_8;
+ break;
+ default:
+ fcr |= UART_FCR_TRIGGER_14;
+ break;
+ }
+ }
+ }
+
+ /* CTS flow control flag and modem status interrupts */
+ info->IER &= ~UART_IER_MSI;
+ info->MCR &= ~UART_MCR_AFE;
+ if (cflag & CRTSCTS) {
+ info->port.flags |= ASYNC_CTS_FLOW;
+ info->IER |= UART_IER_MSI;
+ if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
+ info->MCR |= UART_MCR_AFE;
+ } else {
+ status = inb(info->ioaddr + UART_MSR);
+ if (tty->hw_stopped) {
+ if (status & UART_MSR_CTS) {
+ tty->hw_stopped = 0;
+ if (info->type != PORT_16550A &&
+ !info->board->chip_flag) {
+ outb(info->IER & ~UART_IER_THRI,
+ info->ioaddr +
+ UART_IER);
+ info->IER |= UART_IER_THRI;
+ outb(info->IER, info->ioaddr +
+ UART_IER);
+ }
+ tty_wakeup(tty);
+ }
+ } else {
+ if (!(status & UART_MSR_CTS)) {
+ tty->hw_stopped = 1;
+ if ((info->type != PORT_16550A) &&
+ (!info->board->chip_flag)) {
+ info->IER &= ~UART_IER_THRI;
+ outb(info->IER, info->ioaddr +
+ UART_IER);
+ }
+ }
+ }
+ }
+ } else {
+ info->port.flags &= ~ASYNC_CTS_FLOW;
+ }
+ outb(info->MCR, info->ioaddr + UART_MCR);
+ if (cflag & CLOCAL) {
+ info->port.flags &= ~ASYNC_CHECK_CD;
+ } else {
+ info->port.flags |= ASYNC_CHECK_CD;
+ info->IER |= UART_IER_MSI;
+ }
+ outb(info->IER, info->ioaddr + UART_IER);
+
+ /*
+ * Set up parity check flag
+ */
+ info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
+ if (I_INPCK(tty))
+ info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+ if (I_BRKINT(tty) || I_PARMRK(tty))
+ info->read_status_mask |= UART_LSR_BI;
+
+ info->ignore_status_mask = 0;
+
+ if (I_IGNBRK(tty)) {
+ info->ignore_status_mask |= UART_LSR_BI;
+ info->read_status_mask |= UART_LSR_BI;
+ /*
+ * If we're ignore parity and break indicators, ignore
+ * overruns too. (For real raw support).
+ */
+ if (I_IGNPAR(tty)) {
+ info->ignore_status_mask |=
+ UART_LSR_OE |
+ UART_LSR_PE |
+ UART_LSR_FE;
+ info->read_status_mask |=
+ UART_LSR_OE |
+ UART_LSR_PE |
+ UART_LSR_FE;
+ }
+ }
+ if (info->board->chip_flag) {
+ mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
+ mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
+ if (I_IXON(tty)) {
+ mxser_enable_must_rx_software_flow_control(
+ info->ioaddr);
+ } else {
+ mxser_disable_must_rx_software_flow_control(
+ info->ioaddr);
+ }
+ if (I_IXOFF(tty)) {
+ mxser_enable_must_tx_software_flow_control(
+ info->ioaddr);
+ } else {
+ mxser_disable_must_tx_software_flow_control(
+ info->ioaddr);
+ }
+ }
+
+
+ outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
+ outb(cval, info->ioaddr + UART_LCR);
+
+ return ret;
+}
+
+static void mxser_check_modem_status(struct tty_struct *tty,
+ struct mxser_port *port, int status)
+{
+ /* update input line counters */
+ if (status & UART_MSR_TERI)
+ port->icount.rng++;
+ if (status & UART_MSR_DDSR)
+ port->icount.dsr++;
+ if (status & UART_MSR_DDCD)
+ port->icount.dcd++;
+ if (status & UART_MSR_DCTS)
+ port->icount.cts++;
+ port->mon_data.modem_status = status;
+ wake_up_interruptible(&port->port.delta_msr_wait);
+
+ if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
+ if (status & UART_MSR_DCD)
+ wake_up_interruptible(&port->port.open_wait);
+ }
+
+ if (port->port.flags & ASYNC_CTS_FLOW) {
+ if (tty->hw_stopped) {
+ if (status & UART_MSR_CTS) {
+ tty->hw_stopped = 0;
+
+ if ((port->type != PORT_16550A) &&
+ (!port->board->chip_flag)) {
+ outb(port->IER & ~UART_IER_THRI,
+ port->ioaddr + UART_IER);
+ port->IER |= UART_IER_THRI;
+ outb(port->IER, port->ioaddr +
+ UART_IER);
+ }
+ tty_wakeup(tty);
+ }
+ } else {
+ if (!(status & UART_MSR_CTS)) {
+ tty->hw_stopped = 1;
+ if (port->type != PORT_16550A &&
+ !port->board->chip_flag) {
+ port->IER &= ~UART_IER_THRI;
+ outb(port->IER, port->ioaddr +
+ UART_IER);
+ }
+ }
+ }
+ }
+}
+
+static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
+{
+ struct mxser_port *info = container_of(port, struct mxser_port, port);
+ unsigned long page;
+ unsigned long flags;
+
+ page = __get_free_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&info->slock, flags);
+
+ if (!info->ioaddr || !info->type) {
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ free_page(page);
+ spin_unlock_irqrestore(&info->slock, flags);
+ return 0;
+ }
+ info->port.xmit_buf = (unsigned char *) page;
+
+ /*
+ * Clear the FIFO buffers and disable them
+ * (they will be reenabled in mxser_change_speed())
+ */
+ if (info->board->chip_flag)
+ outb((UART_FCR_CLEAR_RCVR |
+ UART_FCR_CLEAR_XMIT |
+ MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
+ else
+ outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
+ info->ioaddr + UART_FCR);
+
+ /*
+ * At this point there's no way the LSR could still be 0xFF;
+ * if it is, then bail out, because there's likely no UART
+ * here.
+ */
+ if (inb(info->ioaddr + UART_LSR) == 0xff) {
+ spin_unlock_irqrestore(&info->slock, flags);
+ if (capable(CAP_SYS_ADMIN)) {
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ return 0;
+ } else
+ return -ENODEV;
+ }
+
+ /*
+ * Clear the interrupt registers.
+ */
+ (void) inb(info->ioaddr + UART_LSR);
+ (void) inb(info->ioaddr + UART_RX);
+ (void) inb(info->ioaddr + UART_IIR);
+ (void) inb(info->ioaddr + UART_MSR);
+
+ /*
+ * Now, initialize the UART
+ */
+ outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
+ info->MCR = UART_MCR_DTR | UART_MCR_RTS;
+ outb(info->MCR, info->ioaddr + UART_MCR);
+
+ /*
+ * Finally, enable interrupts
+ */
+ info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
+
+ if (info->board->chip_flag)
+ info->IER |= MOXA_MUST_IER_EGDAI;
+ outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
+
+ /*
+ * And clear the interrupt registers again for luck.
+ */
+ (void) inb(info->ioaddr + UART_LSR);
+ (void) inb(info->ioaddr + UART_RX);
+ (void) inb(info->ioaddr + UART_IIR);
+ (void) inb(info->ioaddr + UART_MSR);
+
+ clear_bit(TTY_IO_ERROR, &tty->flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+ /*
+ * and set the speed of the serial port
+ */
+ mxser_change_speed(tty, NULL);
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ return 0;
+}
+
+/*
+ * This routine will shutdown a serial port
+ */
+static void mxser_shutdown_port(struct tty_port *port)
+{
+ struct mxser_port *info = container_of(port, struct mxser_port, port);
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->slock, flags);
+
+ /*
+ * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
+ * here so the queue might never be waken up
+ */
+ wake_up_interruptible(&info->port.delta_msr_wait);
+
+ /*
+ * Free the xmit buffer, if necessary
+ */
+ if (info->port.xmit_buf) {
+ free_page((unsigned long) info->port.xmit_buf);
+ info->port.xmit_buf = NULL;
+ }
+
+ info->IER = 0;
+ outb(0x00, info->ioaddr + UART_IER);
+
+ /* clear Rx/Tx FIFO's */
+ if (info->board->chip_flag)
+ outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
+ MOXA_MUST_FCR_GDA_MODE_ENABLE,
+ info->ioaddr + UART_FCR);
+ else
+ outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
+ info->ioaddr + UART_FCR);
+
+ /* read data port to reset things */
+ (void) inb(info->ioaddr + UART_RX);
+
+
+ if (info->board->chip_flag)
+ SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
+
+ spin_unlock_irqrestore(&info->slock, flags);
+}
+
+/*
+ * This routine is called whenever a serial port is opened. It
+ * enables interrupts for a serial port, linking in its async structure into
+ * the IRQ chain. It also performs the serial-specific
+ * initialization for the tty structure.
+ */
+static int mxser_open(struct tty_struct *tty, struct file *filp)
+{
+ struct mxser_port *info;
+ int line;
+
+ line = tty->index;
+ if (line == MXSER_PORTS)
+ return 0;
+ if (line < 0 || line > MXSER_PORTS)
+ return -ENODEV;
+ info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
+ if (!info->ioaddr)
+ return -ENODEV;
+
+ tty->driver_data = info;
+ return tty_port_open(&info->port, tty, filp);
+}
+
+static void mxser_flush_buffer(struct tty_struct *tty)
+{
+ struct mxser_port *info = tty->driver_data;
+ char fcr;
+ unsigned long flags;
+
+
+ spin_lock_irqsave(&info->slock, flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+ fcr = inb(info->ioaddr + UART_FCR);
+ outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
+ info->ioaddr + UART_FCR);
+ outb(fcr, info->ioaddr + UART_FCR);
+
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ tty_wakeup(tty);
+}
+
+
+static void mxser_close_port(struct tty_port *port)
+{
+ struct mxser_port *info = container_of(port, struct mxser_port, port);
+ unsigned long timeout;
+ /*
+ * At this point we stop accepting input. To do this, we
+ * disable the receive line status interrupts, and tell the
+ * interrupt driver to stop checking the data ready bit in the
+ * line status register.
+ */
+ info->IER &= ~UART_IER_RLSI;
+ if (info->board->chip_flag)
+ info->IER &= ~MOXA_MUST_RECV_ISR;
+
+ outb(info->IER, info->ioaddr + UART_IER);
+ /*
+ * Before we drop DTR, make sure the UART transmitter
+ * has completely drained; this is especially
+ * important if there is a transmit FIFO!
+ */
+ timeout = jiffies + HZ;
+ while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
+ schedule_timeout_interruptible(5);
+ if (time_after(jiffies, timeout))
+ break;
+ }
+}
+
+/*
+ * This routine is called when the serial port gets closed. First, we
+ * wait for the last remaining data to be sent. Then, we unlink its
+ * async structure from the interrupt chain if necessary, and we free
+ * that IRQ if nothing is left in the chain.
+ */
+static void mxser_close(struct tty_struct *tty, struct file *filp)
+{
+ struct mxser_port *info = tty->driver_data;
+ struct tty_port *port = &info->port;
+
+ if (tty->index == MXSER_PORTS || info == NULL)
+ return;
+ if (tty_port_close_start(port, tty, filp) == 0)
+ return;
+ mutex_lock(&port->mutex);
+ mxser_close_port(port);
+ mxser_flush_buffer(tty);
+ mxser_shutdown_port(port);
+ clear_bit(ASYNCB_INITIALIZED, &port->flags);
+ mutex_unlock(&port->mutex);
+ /* Right now the tty_port set is done outside of the close_end helper
+ as we don't yet have everyone using refcounts */
+ tty_port_close_end(port, tty);
+ tty_port_tty_set(port, NULL);
+}
+
+static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
+{
+ int c, total = 0;
+ struct mxser_port *info = tty->driver_data;
+ unsigned long flags;
+
+ if (!info->port.xmit_buf)
+ return 0;
+
+ while (1) {
+ c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - info->xmit_head));
+ if (c <= 0)
+ break;
+
+ memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
+ spin_lock_irqsave(&info->slock, flags);
+ info->xmit_head = (info->xmit_head + c) &
+ (SERIAL_XMIT_SIZE - 1);
+ info->xmit_cnt += c;
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ buf += c;
+ count -= c;
+ total += c;
+ }
+
+ if (info->xmit_cnt && !tty->stopped) {
+ if (!tty->hw_stopped ||
+ (info->type == PORT_16550A) ||
+ (info->board->chip_flag)) {
+ spin_lock_irqsave(&info->slock, flags);
+ outb(info->IER & ~UART_IER_THRI, info->ioaddr +
+ UART_IER);
+ info->IER |= UART_IER_THRI;
+ outb(info->IER, info->ioaddr + UART_IER);
+ spin_unlock_irqrestore(&info->slock, flags);
+ }
+ }
+ return total;
+}
+
+static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct mxser_port *info = tty->driver_data;
+ unsigned long flags;
+
+ if (!info->port.xmit_buf)
+ return 0;
+
+ if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
+ return 0;
+
+ spin_lock_irqsave(&info->slock, flags);
+ info->port.xmit_buf[info->xmit_head++] = ch;
+ info->xmit_head &= SERIAL_XMIT_SIZE - 1;
+ info->xmit_cnt++;
+ spin_unlock_irqrestore(&info->slock, flags);
+ if (!tty->stopped) {
+ if (!tty->hw_stopped ||
+ (info->type == PORT_16550A) ||
+ info->board->chip_flag) {
+ spin_lock_irqsave(&info->slock, flags);
+ outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
+ info->IER |= UART_IER_THRI;
+ outb(info->IER, info->ioaddr + UART_IER);
+ spin_unlock_irqrestore(&info->slock, flags);
+ }
+ }
+ return 1;
+}
+
+
+static void mxser_flush_chars(struct tty_struct *tty)
+{
+ struct mxser_port *info = tty->driver_data;
+ unsigned long flags;
+
+ if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
+ (tty->hw_stopped && info->type != PORT_16550A &&
+ !info->board->chip_flag))
+ return;
+
+ spin_lock_irqsave(&info->slock, flags);
+
+ outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
+ info->IER |= UART_IER_THRI;
+ outb(info->IER, info->ioaddr + UART_IER);
+
+ spin_unlock_irqrestore(&info->slock, flags);
+}
+
+static int mxser_write_room(struct tty_struct *tty)
+{
+ struct mxser_port *info = tty->driver_data;
+ int ret;
+
+ ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
+ return ret < 0 ? 0 : ret;
+}
+
+static int mxser_chars_in_buffer(struct tty_struct *tty)
+{
+ struct mxser_port *info = tty->driver_data;
+ return info->xmit_cnt;
+}
+
+/*
+ * ------------------------------------------------------------
+ * friends of mxser_ioctl()
+ * ------------------------------------------------------------
+ */
+static int mxser_get_serial_info(struct tty_struct *tty,
+ struct serial_struct __user *retinfo)
+{
+ struct mxser_port *info = tty->driver_data;
+ struct serial_struct tmp = {
+ .type = info->type,
+ .line = tty->index,
+ .port = info->ioaddr,
+ .irq = info->board->irq,
+ .flags = info->port.flags,
+ .baud_base = info->baud_base,
+ .close_delay = info->port.close_delay,
+ .closing_wait = info->port.closing_wait,
+ .custom_divisor = info->custom_divisor,
+ .hub6 = 0
+ };
+ if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
+ return -EFAULT;
+ return 0;
+}
+
+static int mxser_set_serial_info(struct tty_struct *tty,
+ struct serial_struct __user *new_info)
+{
+ struct mxser_port *info = tty->driver_data;
+ struct tty_port *port = &info->port;
+ struct serial_struct new_serial;
+ speed_t baud;
+ unsigned long sl_flags;
+ unsigned int flags;
+ int retval = 0;
+
+ if (!new_info || !info->ioaddr)
+ return -ENODEV;
+ if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
+ return -EFAULT;
+
+ if (new_serial.irq != info->board->irq ||
+ new_serial.port != info->ioaddr)
+ return -EINVAL;
+
+ flags = port->flags & ASYNC_SPD_MASK;
+
+ if (!capable(CAP_SYS_ADMIN)) {
+ if ((new_serial.baud_base != info->baud_base) ||
+ (new_serial.close_delay != info->port.close_delay) ||
+ ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
+ return -EPERM;
+ info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
+ (new_serial.flags & ASYNC_USR_MASK));
+ } else {
+ /*
+ * OK, past this point, all the error checking has been done.
+ * At this point, we start making changes.....
+ */
+ port->flags = ((port->flags & ~ASYNC_FLAGS) |
+ (new_serial.flags & ASYNC_FLAGS));
+ port->close_delay = new_serial.close_delay * HZ / 100;
+ port->closing_wait = new_serial.closing_wait * HZ / 100;
+ tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+ if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
+ (new_serial.baud_base != info->baud_base ||
+ new_serial.custom_divisor !=
+ info->custom_divisor)) {
+ if (new_serial.custom_divisor == 0)
+ return -EINVAL;
+ baud = new_serial.baud_base / new_serial.custom_divisor;
+ tty_encode_baud_rate(tty, baud, baud);
+ }
+ }
+
+ info->type = new_serial.type;
+
+ process_txrx_fifo(info);
+
+ if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
+ if (flags != (port->flags & ASYNC_SPD_MASK)) {
+ spin_lock_irqsave(&info->slock, sl_flags);
+ mxser_change_speed(tty, NULL);
+ spin_unlock_irqrestore(&info->slock, sl_flags);
+ }
+ } else {
+ retval = mxser_activate(port, tty);
+ if (retval == 0)
+ set_bit(ASYNCB_INITIALIZED, &port->flags);
+ }
+ return retval;
+}
+
+/*
+ * mxser_get_lsr_info - get line status register info
+ *
+ * Purpose: Let user call ioctl() to get info when the UART physically
+ * is emptied. On bus types like RS485, the transmitter must
+ * release the bus after transmitting. This must be done when
+ * the transmit shift register is empty, not be done when the
+ * transmit holding register is empty. This functionality
+ * allows an RS485 driver to be written in user space.
+ */
+static int mxser_get_lsr_info(struct mxser_port *info,
+ unsigned int __user *value)
+{
+ unsigned char status;
+ unsigned int result;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->slock, flags);
+ status = inb(info->ioaddr + UART_LSR);
+ spin_unlock_irqrestore(&info->slock, flags);
+ result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
+ return put_user(result, value);
+}
+
+static int mxser_tiocmget(struct tty_struct *tty)
+{
+ struct mxser_port *info = tty->driver_data;
+ unsigned char control, status;
+ unsigned long flags;
+
+
+ if (tty->index == MXSER_PORTS)
+ return -ENOIOCTLCMD;
+ if (test_bit(TTY_IO_ERROR, &tty->flags))
+ return -EIO;
+
+ control = info->MCR;
+
+ spin_lock_irqsave(&info->slock, flags);
+ status = inb(info->ioaddr + UART_MSR);
+ if (status & UART_MSR_ANY_DELTA)
+ mxser_check_modem_status(tty, info, status);
+ spin_unlock_irqrestore(&info->slock, flags);
+ return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
+ ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
+ ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
+ ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
+ ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
+ ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
+}
+
+static int mxser_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct mxser_port *info = tty->driver_data;
+ unsigned long flags;
+
+
+ if (tty->index == MXSER_PORTS)
+ return -ENOIOCTLCMD;
+ if (test_bit(TTY_IO_ERROR, &tty->flags))
+ return -EIO;
+
+ spin_lock_irqsave(&info->slock, flags);
+
+ if (set & TIOCM_RTS)
+ info->MCR |= UART_MCR_RTS;
+ if (set & TIOCM_DTR)
+ info->MCR |= UART_MCR_DTR;
+
+ if (clear & TIOCM_RTS)
+ info->MCR &= ~UART_MCR_RTS;
+ if (clear & TIOCM_DTR)
+ info->MCR &= ~UART_MCR_DTR;
+
+ outb(info->MCR, info->ioaddr + UART_MCR);
+ spin_unlock_irqrestore(&info->slock, flags);
+ return 0;
+}
+
+static int __init mxser_program_mode(int port)
+{
+ int id, i, j, n;
+
+ outb(0, port);
+ outb(0, port);
+ outb(0, port);
+ (void)inb(port);
+ (void)inb(port);
+ outb(0, port);
+ (void)inb(port);
+
+ id = inb(port + 1) & 0x1F;
+ if ((id != C168_ASIC_ID) &&
+ (id != C104_ASIC_ID) &&
+ (id != C102_ASIC_ID) &&
+ (id != CI132_ASIC_ID) &&
+ (id != CI134_ASIC_ID) &&
+ (id != CI104J_ASIC_ID))
+ return -1;
+ for (i = 0, j = 0; i < 4; i++) {
+ n = inb(port + 2);
+ if (n == 'M') {
+ j = 1;
+ } else if ((j == 1) && (n == 1)) {
+ j = 2;
+ break;
+ } else
+ j = 0;
+ }
+ if (j != 2)
+ id = -2;
+ return id;
+}
+
+static void __init mxser_normal_mode(int port)
+{
+ int i, n;
+
+ outb(0xA5, port + 1);
+ outb(0x80, port + 3);
+ outb(12, port + 0); /* 9600 bps */
+ outb(0, port + 1);
+ outb(0x03, port + 3); /* 8 data bits */
+ outb(0x13, port + 4); /* loop back mode */
+ for (i = 0; i < 16; i++) {
+ n = inb(port + 5);
+ if ((n & 0x61) == 0x60)
+ break;
+ if ((n & 1) == 1)
+ (void)inb(port);
+ }
+ outb(0x00, port + 4);
+}
+
+#define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
+#define CHIP_DO 0x02 /* Serial Data Output in Eprom */
+#define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
+#define CHIP_DI 0x08 /* Serial Data Input in Eprom */
+#define EN_CCMD 0x000 /* Chip's command register */
+#define EN0_RSARLO 0x008 /* Remote start address reg 0 */
+#define EN0_RSARHI 0x009 /* Remote start address reg 1 */
+#define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
+#define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
+#define EN0_DCFG 0x00E /* Data configuration reg WR */
+#define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
+#define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
+#define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
+static int __init mxser_read_register(int port, unsigned short *regs)
+{
+ int i, k, value, id;
+ unsigned int j;
+
+ id = mxser_program_mode(port);
+ if (id < 0)
+ return id;
+ for (i = 0; i < 14; i++) {
+ k = (i & 0x3F) | 0x180;
+ for (j = 0x100; j > 0; j >>= 1) {
+ outb(CHIP_CS, port);
+ if (k & j) {
+ outb(CHIP_CS | CHIP_DO, port);
+ outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
+ } else {
+ outb(CHIP_CS, port);
+ outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
+ }
+ }
+ (void)inb(port);
+ value = 0;
+ for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
+ outb(CHIP_CS, port);
+ outb(CHIP_CS | CHIP_SK, port);
+ if (inb(port) & CHIP_DI)
+ value |= j;
+ }
+ regs[i] = value;
+ outb(0, port);
+ }
+ mxser_normal_mode(port);
+ return id;
+}
+
+static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
+{
+ struct mxser_port *ip;
+ struct tty_port *port;
+ struct tty_struct *tty;
+ int result, status;
+ unsigned int i, j;
+ int ret = 0;
+
+ switch (cmd) {
+ case MOXA_GET_MAJOR:
+ if (printk_ratelimit())
+ printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
+ "%x (GET_MAJOR), fix your userspace\n",
+ current->comm, cmd);
+ return put_user(ttymajor, (int __user *)argp);
+
+ case MOXA_CHKPORTENABLE:
+ result = 0;
+ for (i = 0; i < MXSER_BOARDS; i++)
+ for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
+ if (mxser_boards[i].ports[j].ioaddr)
+ result |= (1 << i);
+ return put_user(result, (unsigned long __user *)argp);
+ case MOXA_GETDATACOUNT:
+ /* The receive side is locked by port->slock but it isn't
+ clear that an exact snapshot is worth copying here */
+ if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
+ ret = -EFAULT;
+ return ret;
+ case MOXA_GETMSTATUS: {
+ struct mxser_mstatus ms, __user *msu = argp;
+ for (i = 0; i < MXSER_BOARDS; i++)
+ for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
+ ip = &mxser_boards[i].ports[j];
+ port = &ip->port;
+ memset(&ms, 0, sizeof(ms));
+
+ mutex_lock(&port->mutex);
+ if (!ip->ioaddr)
+ goto copy;
+
+ tty = tty_port_tty_get(port);
+
+ if (!tty || !tty->termios)
+ ms.cflag = ip->normal_termios.c_cflag;
+ else
+ ms.cflag = tty->termios->c_cflag;
+ tty_kref_put(tty);
+ spin_lock_irq(&ip->slock);
+ status = inb(ip->ioaddr + UART_MSR);
+ spin_unlock_irq(&ip->slock);
+ if (status & UART_MSR_DCD)
+ ms.dcd = 1;
+ if (status & UART_MSR_DSR)
+ ms.dsr = 1;
+ if (status & UART_MSR_CTS)
+ ms.cts = 1;
+ copy:
+ mutex_unlock(&port->mutex);
+ if (copy_to_user(msu, &ms, sizeof(ms)))
+ return -EFAULT;
+ msu++;
+ }
+ return 0;
+ }
+ case MOXA_ASPP_MON_EXT: {
+ struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
+ unsigned int cflag, iflag, p;
+ u8 opmode;
+
+ me = kzalloc(sizeof(*me), GFP_KERNEL);
+ if (!me)
+ return -ENOMEM;
+
+ for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
+ for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
+ if (p >= ARRAY_SIZE(me->rx_cnt)) {
+ i = MXSER_BOARDS;
+ break;
+ }
+ ip = &mxser_boards[i].ports[j];
+ port = &ip->port;
+
+ mutex_lock(&port->mutex);
+ if (!ip->ioaddr) {
+ mutex_unlock(&port->mutex);
+ continue;
+ }
+
+ spin_lock_irq(&ip->slock);
+ status = mxser_get_msr(ip->ioaddr, 0, p);
+
+ if (status & UART_MSR_TERI)
+ ip->icount.rng++;
+ if (status & UART_MSR_DDSR)
+ ip->icount.dsr++;
+ if (status & UART_MSR_DDCD)
+ ip->icount.dcd++;
+ if (status & UART_MSR_DCTS)
+ ip->icount.cts++;
+
+ ip->mon_data.modem_status = status;
+ me->rx_cnt[p] = ip->mon_data.rxcnt;
+ me->tx_cnt[p] = ip->mon_data.txcnt;
+ me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
+ me->up_txcnt[p] = ip->mon_data.up_txcnt;
+ me->modem_status[p] =
+ ip->mon_data.modem_status;
+ spin_unlock_irq(&ip->slock);
+
+ tty = tty_port_tty_get(&ip->port);
+
+ if (!tty || !tty->termios) {
+ cflag = ip->normal_termios.c_cflag;
+ iflag = ip->normal_termios.c_iflag;
+ me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
+ } else {
+ cflag = tty->termios->c_cflag;
+ iflag = tty->termios->c_iflag;
+ me->baudrate[p] = tty_get_baud_rate(tty);
+ }
+ tty_kref_put(tty);
+
+ me->databits[p] = cflag & CSIZE;
+ me->stopbits[p] = cflag & CSTOPB;
+ me->parity[p] = cflag & (PARENB | PARODD |
+ CMSPAR);
+
+ if (cflag & CRTSCTS)
+ me->flowctrl[p] |= 0x03;
+
+ if (iflag & (IXON | IXOFF))
+ me->flowctrl[p] |= 0x0C;
+
+ if (ip->type == PORT_16550A)
+ me->fifo[p] = 1;
+
+ opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
+ opmode &= OP_MODE_MASK;
+ me->iftype[p] = opmode;
+ mutex_unlock(&port->mutex);
+ }
+ }
+ if (copy_to_user(argp, me, sizeof(*me)))
+ ret = -EFAULT;
+ kfree(me);
+ return ret;
+ }
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
+ struct async_icount *cprev)
+{
+ struct async_icount cnow;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&info->slock, flags);
+ cnow = info->icount; /* atomic copy */
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
+ ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
+ ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
+ ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
+
+ *cprev = cnow;
+
+ return ret;
+}
+
+static int mxser_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct mxser_port *info = tty->driver_data;
+ struct tty_port *port = &info->port;
+ struct async_icount cnow;
+ unsigned long flags;
+ void __user *argp = (void __user *)arg;
+ int retval;
+
+ if (tty->index == MXSER_PORTS)
+ return mxser_ioctl_special(cmd, argp);
+
+ if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
+ int p;
+ unsigned long opmode;
+ static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
+ int shiftbit;
+ unsigned char val, mask;
+
+ p = tty->index % 4;
+ if (cmd == MOXA_SET_OP_MODE) {
+ if (get_user(opmode, (int __user *) argp))
+ return -EFAULT;
+ if (opmode != RS232_MODE &&
+ opmode != RS485_2WIRE_MODE &&
+ opmode != RS422_MODE &&
+ opmode != RS485_4WIRE_MODE)
+ return -EFAULT;
+ mask = ModeMask[p];
+ shiftbit = p * 2;
+ spin_lock_irq(&info->slock);
+ val = inb(info->opmode_ioaddr);
+ val &= mask;
+ val |= (opmode << shiftbit);
+ outb(val, info->opmode_ioaddr);
+ spin_unlock_irq(&info->slock);
+ } else {
+ shiftbit = p * 2;
+ spin_lock_irq(&info->slock);
+ opmode = inb(info->opmode_ioaddr) >> shiftbit;
+ spin_unlock_irq(&info->slock);
+ opmode &= OP_MODE_MASK;
+ if (put_user(opmode, (int __user *)argp))
+ return -EFAULT;
+ }
+ return 0;
+ }
+
+ if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT &&
+ test_bit(TTY_IO_ERROR, &tty->flags))
+ return -EIO;
+
+ switch (cmd) {
+ case TIOCGSERIAL:
+ mutex_lock(&port->mutex);
+ retval = mxser_get_serial_info(tty, argp);
+ mutex_unlock(&port->mutex);
+ return retval;
+ case TIOCSSERIAL:
+ mutex_lock(&port->mutex);
+ retval = mxser_set_serial_info(tty, argp);
+ mutex_unlock(&port->mutex);
+ return retval;
+ case TIOCSERGETLSR: /* Get line status register */
+ return mxser_get_lsr_info(info, argp);
+ /*
+ * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
+ * - mask passed in arg for lines of interest
+ * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
+ * Caller should use TIOCGICOUNT to see which one it was
+ */
+ case TIOCMIWAIT:
+ spin_lock_irqsave(&info->slock, flags);
+ cnow = info->icount; /* note the counters on entry */
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ return wait_event_interruptible(info->port.delta_msr_wait,
+ mxser_cflags_changed(info, arg, &cnow));
+ case MOXA_HighSpeedOn:
+ return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
+ case MOXA_SDS_RSTICOUNTER:
+ spin_lock_irq(&info->slock);
+ info->mon_data.rxcnt = 0;
+ info->mon_data.txcnt = 0;
+ spin_unlock_irq(&info->slock);
+ return 0;
+
+ case MOXA_ASPP_OQUEUE:{
+ int len, lsr;
+
+ len = mxser_chars_in_buffer(tty);
+ spin_lock_irq(&info->slock);
+ lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
+ spin_unlock_irq(&info->slock);
+ len += (lsr ? 0 : 1);
+
+ return put_user(len, (int __user *)argp);
+ }
+ case MOXA_ASPP_MON: {
+ int mcr, status;
+
+ spin_lock_irq(&info->slock);
+ status = mxser_get_msr(info->ioaddr, 1, tty->index);
+ mxser_check_modem_status(tty, info, status);
+
+ mcr = inb(info->ioaddr + UART_MCR);
+ spin_unlock_irq(&info->slock);
+
+ if (mcr & MOXA_MUST_MCR_XON_FLAG)
+ info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
+ else
+ info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
+
+ if (mcr & MOXA_MUST_MCR_TX_XON)
+ info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
+ else
+ info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
+
+ if (tty->hw_stopped)
+ info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
+ else
+ info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
+
+ if (copy_to_user(argp, &info->mon_data,
+ sizeof(struct mxser_mon)))
+ return -EFAULT;
+
+ return 0;
+ }
+ case MOXA_ASPP_LSTATUS: {
+ if (put_user(info->err_shadow, (unsigned char __user *)argp))
+ return -EFAULT;
+
+ info->err_shadow = 0;
+ return 0;
+ }
+ case MOXA_SET_BAUD_METHOD: {
+ int method;
+
+ if (get_user(method, (int __user *)argp))
+ return -EFAULT;
+ mxser_set_baud_method[tty->index] = method;
+ return put_user(method, (int __user *)argp);
+ }
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+ /*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for
+ * RI where only 0->1 is counted.
+ */
+
+static int mxser_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+
+{
+ struct mxser_port *info = tty->driver_data;
+ struct async_icount cnow;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->slock, flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ icount->frame = cnow.frame;
+ icount->brk = cnow.brk;
+ icount->overrun = cnow.overrun;
+ icount->buf_overrun = cnow.buf_overrun;
+ icount->parity = cnow.parity;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ return 0;
+}
+
+static void mxser_stoprx(struct tty_struct *tty)
+{
+ struct mxser_port *info = tty->driver_data;
+
+ info->ldisc_stop_rx = 1;
+ if (I_IXOFF(tty)) {
+ if (info->board->chip_flag) {
+ info->IER &= ~MOXA_MUST_RECV_ISR;
+ outb(info->IER, info->ioaddr + UART_IER);
+ } else {
+ info->x_char = STOP_CHAR(tty);
+ outb(0, info->ioaddr + UART_IER);
+ info->IER |= UART_IER_THRI;
+ outb(info->IER, info->ioaddr + UART_IER);
+ }
+ }
+
+ if (tty->termios->c_cflag & CRTSCTS) {
+ info->MCR &= ~UART_MCR_RTS;
+ outb(info->MCR, info->ioaddr + UART_MCR);
+ }
+}
+
+/*
+ * This routine is called by the upper-layer tty layer to signal that
+ * incoming characters should be throttled.
+ */
+static void mxser_throttle(struct tty_struct *tty)
+{
+ mxser_stoprx(tty);
+}
+
+static void mxser_unthrottle(struct tty_struct *tty)
+{
+ struct mxser_port *info = tty->driver_data;
+
+ /* startrx */
+ info->ldisc_stop_rx = 0;
+ if (I_IXOFF(tty)) {
+ if (info->x_char)
+ info->x_char = 0;
+ else {
+ if (info->board->chip_flag) {
+ info->IER |= MOXA_MUST_RECV_ISR;
+ outb(info->IER, info->ioaddr + UART_IER);
+ } else {
+ info->x_char = START_CHAR(tty);
+ outb(0, info->ioaddr + UART_IER);
+ info->IER |= UART_IER_THRI;
+ outb(info->IER, info->ioaddr + UART_IER);
+ }
+ }
+ }
+
+ if (tty->termios->c_cflag & CRTSCTS) {
+ info->MCR |= UART_MCR_RTS;
+ outb(info->MCR, info->ioaddr + UART_MCR);
+ }
+}
+
+/*
+ * mxser_stop() and mxser_start()
+ *
+ * This routines are called before setting or resetting tty->stopped.
+ * They enable or disable transmitter interrupts, as necessary.
+ */
+static void mxser_stop(struct tty_struct *tty)
+{
+ struct mxser_port *info = tty->driver_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->slock, flags);
+ if (info->IER & UART_IER_THRI) {
+ info->IER &= ~UART_IER_THRI;
+ outb(info->IER, info->ioaddr + UART_IER);
+ }
+ spin_unlock_irqrestore(&info->slock, flags);
+}
+
+static void mxser_start(struct tty_struct *tty)
+{
+ struct mxser_port *info = tty->driver_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->slock, flags);
+ if (info->xmit_cnt && info->port.xmit_buf) {
+ outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
+ info->IER |= UART_IER_THRI;
+ outb(info->IER, info->ioaddr + UART_IER);
+ }
+ spin_unlock_irqrestore(&info->slock, flags);
+}
+
+static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+{
+ struct mxser_port *info = tty->driver_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->slock, flags);
+ mxser_change_speed(tty, old_termios);
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ if ((old_termios->c_cflag & CRTSCTS) &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ mxser_start(tty);
+ }
+
+ /* Handle sw stopped */
+ if ((old_termios->c_iflag & IXON) &&
+ !(tty->termios->c_iflag & IXON)) {
+ tty->stopped = 0;
+
+ if (info->board->chip_flag) {
+ spin_lock_irqsave(&info->slock, flags);
+ mxser_disable_must_rx_software_flow_control(
+ info->ioaddr);
+ spin_unlock_irqrestore(&info->slock, flags);
+ }
+
+ mxser_start(tty);
+ }
+}
+
+/*
+ * mxser_wait_until_sent() --- wait until the transmitter is empty
+ */
+static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ struct mxser_port *info = tty->driver_data;
+ unsigned long orig_jiffies, char_time;
+ unsigned long flags;
+ int lsr;
+
+ if (info->type == PORT_UNKNOWN)
+ return;
+
+ if (info->xmit_fifo_size == 0)
+ return; /* Just in case.... */
+
+ orig_jiffies = jiffies;
+ /*
+ * Set the check interval to be 1/5 of the estimated time to
+ * send a single character, and make it at least 1. The check
+ * interval should also be less than the timeout.
+ *
+ * Note: we have to use pretty tight timings here to satisfy
+ * the NIST-PCTS.
+ */
+ char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
+ char_time = char_time / 5;
+ if (char_time == 0)
+ char_time = 1;
+ if (timeout && timeout < char_time)
+ char_time = timeout;
+ /*
+ * If the transmitter hasn't cleared in twice the approximate
+ * amount of time to send the entire FIFO, it probably won't
+ * ever clear. This assumes the UART isn't doing flow
+ * control, which is currently the case. Hence, if it ever
+ * takes longer than info->timeout, this is probably due to a
+ * UART bug of some kind. So, we clamp the timeout parameter at
+ * 2*info->timeout.
+ */
+ if (!timeout || timeout > 2 * info->timeout)
+ timeout = 2 * info->timeout;
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+ printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
+ timeout, char_time);
+ printk("jiff=%lu...", jiffies);
+#endif
+ spin_lock_irqsave(&info->slock, flags);
+ while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+ printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
+#endif
+ spin_unlock_irqrestore(&info->slock, flags);
+ schedule_timeout_interruptible(char_time);
+ spin_lock_irqsave(&info->slock, flags);
+ if (signal_pending(current))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies + timeout))
+ break;
+ }
+ spin_unlock_irqrestore(&info->slock, flags);
+ set_current_state(TASK_RUNNING);
+
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+ printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
+#endif
+}
+
+/*
+ * This routine is called by tty_hangup() when a hangup is signaled.
+ */
+static void mxser_hangup(struct tty_struct *tty)
+{
+ struct mxser_port *info = tty->driver_data;
+
+ mxser_flush_buffer(tty);
+ tty_port_hangup(&info->port);
+}
+
+/*
+ * mxser_rs_break() --- routine which turns the break handling on or off
+ */
+static int mxser_rs_break(struct tty_struct *tty, int break_state)
+{
+ struct mxser_port *info = tty->driver_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->slock, flags);
+ if (break_state == -1)
+ outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
+ info->ioaddr + UART_LCR);
+ else
+ outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
+ info->ioaddr + UART_LCR);
+ spin_unlock_irqrestore(&info->slock, flags);
+ return 0;
+}
+
+static void mxser_receive_chars(struct tty_struct *tty,
+ struct mxser_port *port, int *status)
+{
+ unsigned char ch, gdl;
+ int ignored = 0;
+ int cnt = 0;
+ int recv_room;
+ int max = 256;
+
+ recv_room = tty->receive_room;
+ if (recv_room == 0 && !port->ldisc_stop_rx)
+ mxser_stoprx(tty);
+ if (port->board->chip_flag != MOXA_OTHER_UART) {
+
+ if (*status & UART_LSR_SPECIAL)
+ goto intr_old;
+ if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
+ (*status & MOXA_MUST_LSR_RERR))
+ goto intr_old;
+ if (*status & MOXA_MUST_LSR_RERR)
+ goto intr_old;
+
+ gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
+
+ if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
+ gdl &= MOXA_MUST_GDL_MASK;
+ if (gdl >= recv_room) {
+ if (!port->ldisc_stop_rx)
+ mxser_stoprx(tty);
+ }
+ while (gdl--) {
+ ch = inb(port->ioaddr + UART_RX);
+ tty_insert_flip_char(tty, ch, 0);
+ cnt++;
+ }
+ goto end_intr;
+ }
+intr_old:
+
+ do {
+ if (max-- < 0)
+ break;
+
+ ch = inb(port->ioaddr + UART_RX);
+ if (port->board->chip_flag && (*status & UART_LSR_OE))
+ outb(0x23, port->ioaddr + UART_FCR);
+ *status &= port->read_status_mask;
+ if (*status & port->ignore_status_mask) {
+ if (++ignored > 100)
+ break;
+ } else {
+ char flag = 0;
+ if (*status & UART_LSR_SPECIAL) {
+ if (*status & UART_LSR_BI) {
+ flag = TTY_BREAK;
+ port->icount.brk++;
+
+ if (port->port.flags & ASYNC_SAK)
+ do_SAK(tty);
+ } else if (*status & UART_LSR_PE) {
+ flag = TTY_PARITY;
+ port->icount.parity++;
+ } else if (*status & UART_LSR_FE) {
+ flag = TTY_FRAME;
+ port->icount.frame++;
+ } else if (*status & UART_LSR_OE) {
+ flag = TTY_OVERRUN;
+ port->icount.overrun++;
+ } else
+ flag = TTY_BREAK;
+ }
+ tty_insert_flip_char(tty, ch, flag);
+ cnt++;
+ if (cnt >= recv_room) {
+ if (!port->ldisc_stop_rx)
+ mxser_stoprx(tty);
+ break;
+ }
+
+ }
+
+ if (port->board->chip_flag)
+ break;
+
+ *status = inb(port->ioaddr + UART_LSR);
+ } while (*status & UART_LSR_DR);
+
+end_intr:
+ mxvar_log.rxcnt[tty->index] += cnt;
+ port->mon_data.rxcnt += cnt;
+ port->mon_data.up_rxcnt += cnt;
+
+ /*
+ * We are called from an interrupt context with &port->slock
+ * being held. Drop it temporarily in order to prevent
+ * recursive locking.
+ */
+ spin_unlock(&port->slock);
+ tty_flip_buffer_push(tty);
+ spin_lock(&port->slock);
+}
+
+static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
+{
+ int count, cnt;
+
+ if (port->x_char) {
+ outb(port->x_char, port->ioaddr + UART_TX);
+ port->x_char = 0;
+ mxvar_log.txcnt[tty->index]++;
+ port->mon_data.txcnt++;
+ port->mon_data.up_txcnt++;
+ port->icount.tx++;
+ return;
+ }
+
+ if (port->port.xmit_buf == NULL)
+ return;
+
+ if (port->xmit_cnt <= 0 || tty->stopped ||
+ (tty->hw_stopped &&
+ (port->type != PORT_16550A) &&
+ (!port->board->chip_flag))) {
+ port->IER &= ~UART_IER_THRI;
+ outb(port->IER, port->ioaddr + UART_IER);
+ return;
+ }
+
+ cnt = port->xmit_cnt;
+ count = port->xmit_fifo_size;
+ do {
+ outb(port->port.xmit_buf[port->xmit_tail++],
+ port->ioaddr + UART_TX);
+ port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
+ if (--port->xmit_cnt <= 0)
+ break;
+ } while (--count > 0);
+ mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
+
+ port->mon_data.txcnt += (cnt - port->xmit_cnt);
+ port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
+ port->icount.tx += (cnt - port->xmit_cnt);
+
+ if (port->xmit_cnt < WAKEUP_CHARS)
+ tty_wakeup(tty);
+
+ if (port->xmit_cnt <= 0) {
+ port->IER &= ~UART_IER_THRI;
+ outb(port->IER, port->ioaddr + UART_IER);
+ }
+}
+
+/*
+ * This is the serial driver's generic interrupt routine
+ */
+static irqreturn_t mxser_interrupt(int irq, void *dev_id)
+{
+ int status, iir, i;
+ struct mxser_board *brd = NULL;
+ struct mxser_port *port;
+ int max, irqbits, bits, msr;
+ unsigned int int_cnt, pass_counter = 0;
+ int handled = IRQ_NONE;
+ struct tty_struct *tty;
+
+ for (i = 0; i < MXSER_BOARDS; i++)
+ if (dev_id == &mxser_boards[i]) {
+ brd = dev_id;
+ break;
+ }
+
+ if (i == MXSER_BOARDS)
+ goto irq_stop;
+ if (brd == NULL)
+ goto irq_stop;
+ max = brd->info->nports;
+ while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
+ irqbits = inb(brd->vector) & brd->vector_mask;
+ if (irqbits == brd->vector_mask)
+ break;
+
+ handled = IRQ_HANDLED;
+ for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
+ if (irqbits == brd->vector_mask)
+ break;
+ if (bits & irqbits)
+ continue;
+ port = &brd->ports[i];
+
+ int_cnt = 0;
+ spin_lock(&port->slock);
+ do {
+ iir = inb(port->ioaddr + UART_IIR);
+ if (iir & UART_IIR_NO_INT)
+ break;
+ iir &= MOXA_MUST_IIR_MASK;
+ tty = tty_port_tty_get(&port->port);
+ if (!tty ||
+ (port->port.flags & ASYNC_CLOSING) ||
+ !(port->port.flags &
+ ASYNC_INITIALIZED)) {
+ status = inb(port->ioaddr + UART_LSR);
+ outb(0x27, port->ioaddr + UART_FCR);
+ inb(port->ioaddr + UART_MSR);
+ tty_kref_put(tty);
+ break;
+ }
+
+ status = inb(port->ioaddr + UART_LSR);
+
+ if (status & UART_LSR_PE)
+ port->err_shadow |= NPPI_NOTIFY_PARITY;
+ if (status & UART_LSR_FE)
+ port->err_shadow |= NPPI_NOTIFY_FRAMING;
+ if (status & UART_LSR_OE)
+ port->err_shadow |=
+ NPPI_NOTIFY_HW_OVERRUN;
+ if (status & UART_LSR_BI)
+ port->err_shadow |= NPPI_NOTIFY_BREAK;
+
+ if (port->board->chip_flag) {
+ if (iir == MOXA_MUST_IIR_GDA ||
+ iir == MOXA_MUST_IIR_RDA ||
+ iir == MOXA_MUST_IIR_RTO ||
+ iir == MOXA_MUST_IIR_LSR)
+ mxser_receive_chars(tty, port,
+ &status);
+
+ } else {
+ status &= port->read_status_mask;
+ if (status & UART_LSR_DR)
+ mxser_receive_chars(tty, port,
+ &status);
+ }
+ msr = inb(port->ioaddr + UART_MSR);
+ if (msr & UART_MSR_ANY_DELTA)
+ mxser_check_modem_status(tty, port, msr);
+
+ if (port->board->chip_flag) {
+ if (iir == 0x02 && (status &
+ UART_LSR_THRE))
+ mxser_transmit_chars(tty, port);
+ } else {
+ if (status & UART_LSR_THRE)
+ mxser_transmit_chars(tty, port);
+ }
+ tty_kref_put(tty);
+ } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
+ spin_unlock(&port->slock);
+ }
+ }
+
+irq_stop:
+ return handled;
+}
+
+static const struct tty_operations mxser_ops = {
+ .open = mxser_open,
+ .close = mxser_close,
+ .write = mxser_write,
+ .put_char = mxser_put_char,
+ .flush_chars = mxser_flush_chars,
+ .write_room = mxser_write_room,
+ .chars_in_buffer = mxser_chars_in_buffer,
+ .flush_buffer = mxser_flush_buffer,
+ .ioctl = mxser_ioctl,
+ .throttle = mxser_throttle,
+ .unthrottle = mxser_unthrottle,
+ .set_termios = mxser_set_termios,
+ .stop = mxser_stop,
+ .start = mxser_start,
+ .hangup = mxser_hangup,
+ .break_ctl = mxser_rs_break,
+ .wait_until_sent = mxser_wait_until_sent,
+ .tiocmget = mxser_tiocmget,
+ .tiocmset = mxser_tiocmset,
+ .get_icount = mxser_get_icount,
+};
+
+struct tty_port_operations mxser_port_ops = {
+ .carrier_raised = mxser_carrier_raised,
+ .dtr_rts = mxser_dtr_rts,
+ .activate = mxser_activate,
+ .shutdown = mxser_shutdown_port,
+};
+
+/*
+ * The MOXA Smartio/Industio serial driver boot-time initialization code!
+ */
+
+static void mxser_release_ISA_res(struct mxser_board *brd)
+{
+ free_irq(brd->irq, brd);
+ release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
+ release_region(brd->vector, 1);
+}
+
+static int __devinit mxser_initbrd(struct mxser_board *brd,
+ struct pci_dev *pdev)
+{
+ struct mxser_port *info;
+ unsigned int i;
+ int retval;
+
+ printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
+ brd->ports[0].max_baud);
+
+ for (i = 0; i < brd->info->nports; i++) {
+ info = &brd->ports[i];
+ tty_port_init(&info->port);
+ info->port.ops = &mxser_port_ops;
+ info->board = brd;
+ info->stop_rx = 0;
+ info->ldisc_stop_rx = 0;
+
+ /* Enhance mode enabled here */
+ if (brd->chip_flag != MOXA_OTHER_UART)
+ mxser_enable_must_enchance_mode(info->ioaddr);
+
+ info->port.flags = ASYNC_SHARE_IRQ;
+ info->type = brd->uart_type;
+
+ process_txrx_fifo(info);
+
+ info->custom_divisor = info->baud_base * 16;
+ info->port.close_delay = 5 * HZ / 10;
+ info->port.closing_wait = 30 * HZ;
+ info->normal_termios = mxvar_sdriver->init_termios;
+ memset(&info->mon_data, 0, sizeof(struct mxser_mon));
+ info->err_shadow = 0;
+ spin_lock_init(&info->slock);
+
+ /* before set INT ISR, disable all int */
+ outb(inb(info->ioaddr + UART_IER) & 0xf0,
+ info->ioaddr + UART_IER);
+ }
+
+ retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
+ brd);
+ if (retval)
+ printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
+ "conflict with another device.\n",
+ brd->info->name, brd->irq);
+
+ return retval;
+}
+
+static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
+{
+ int id, i, bits;
+ unsigned short regs[16], irq;
+ unsigned char scratch, scratch2;
+
+ brd->chip_flag = MOXA_OTHER_UART;
+
+ id = mxser_read_register(cap, regs);
+ switch (id) {
+ case C168_ASIC_ID:
+ brd->info = &mxser_cards[0];
+ break;
+ case C104_ASIC_ID:
+ brd->info = &mxser_cards[1];
+ break;
+ case CI104J_ASIC_ID:
+ brd->info = &mxser_cards[2];
+ break;
+ case C102_ASIC_ID:
+ brd->info = &mxser_cards[5];
+ break;
+ case CI132_ASIC_ID:
+ brd->info = &mxser_cards[6];
+ break;
+ case CI134_ASIC_ID:
+ brd->info = &mxser_cards[7];
+ break;
+ default:
+ return 0;
+ }
+
+ irq = 0;
+ /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
+ Flag-hack checks if configuration should be read as 2-port here. */
+ if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
+ irq = regs[9] & 0xF000;
+ irq = irq | (irq >> 4);
+ if (irq != (regs[9] & 0xFF00))
+ goto err_irqconflict;
+ } else if (brd->info->nports == 4) {
+ irq = regs[9] & 0xF000;
+ irq = irq | (irq >> 4);
+ irq = irq | (irq >> 8);
+ if (irq != regs[9])
+ goto err_irqconflict;
+ } else if (brd->info->nports == 8) {
+ irq = regs[9] & 0xF000;
+ irq = irq | (irq >> 4);
+ irq = irq | (irq >> 8);
+ if ((irq != regs[9]) || (irq != regs[10]))
+ goto err_irqconflict;
+ }
+
+ if (!irq) {
+ printk(KERN_ERR "mxser: interrupt number unset\n");
+ return -EIO;
+ }
+ brd->irq = ((int)(irq & 0xF000) >> 12);
+ for (i = 0; i < 8; i++)
+ brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
+ if ((regs[12] & 0x80) == 0) {
+ printk(KERN_ERR "mxser: invalid interrupt vector\n");
+ return -EIO;
+ }
+ brd->vector = (int)regs[11]; /* interrupt vector */
+ if (id == 1)
+ brd->vector_mask = 0x00FF;
+ else
+ brd->vector_mask = 0x000F;
+ for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
+ if (regs[12] & bits) {
+ brd->ports[i].baud_base = 921600;
+ brd->ports[i].max_baud = 921600;
+ } else {
+ brd->ports[i].baud_base = 115200;
+ brd->ports[i].max_baud = 115200;
+ }
+ }
+ scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
+ outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
+ outb(0, cap + UART_EFR); /* EFR is the same as FCR */
+ outb(scratch2, cap + UART_LCR);
+ outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
+ scratch = inb(cap + UART_IIR);
+
+ if (scratch & 0xC0)
+ brd->uart_type = PORT_16550A;
+ else
+ brd->uart_type = PORT_16450;
+ if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
+ "mxser(IO)")) {
+ printk(KERN_ERR "mxser: can't request ports I/O region: "
+ "0x%.8lx-0x%.8lx\n",
+ brd->ports[0].ioaddr, brd->ports[0].ioaddr +
+ 8 * brd->info->nports - 1);
+ return -EIO;
+ }
+ if (!request_region(brd->vector, 1, "mxser(vector)")) {
+ release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
+ printk(KERN_ERR "mxser: can't request interrupt vector region: "
+ "0x%.8lx-0x%.8lx\n",
+ brd->ports[0].ioaddr, brd->ports[0].ioaddr +
+ 8 * brd->info->nports - 1);
+ return -EIO;
+ }
+ return brd->info->nports;
+
+err_irqconflict:
+ printk(KERN_ERR "mxser: invalid interrupt number\n");
+ return -EIO;
+}
+
+static int __devinit mxser_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+#ifdef CONFIG_PCI
+ struct mxser_board *brd;
+ unsigned int i, j;
+ unsigned long ioaddress;
+ int retval = -EINVAL;
+
+ for (i = 0; i < MXSER_BOARDS; i++)
+ if (mxser_boards[i].info == NULL)
+ break;
+
+ if (i >= MXSER_BOARDS) {
+ dev_err(&pdev->dev, "too many boards found (maximum %d), board "
+ "not configured\n", MXSER_BOARDS);
+ goto err;
+ }
+
+ brd = &mxser_boards[i];
+ brd->idx = i * MXSER_PORTS_PER_BOARD;
+ dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
+ mxser_cards[ent->driver_data].name,
+ pdev->bus->number, PCI_SLOT(pdev->devfn));
+
+ retval = pci_enable_device(pdev);
+ if (retval) {
+ dev_err(&pdev->dev, "PCI enable failed\n");
+ goto err;
+ }
+
+ /* io address */
+ ioaddress = pci_resource_start(pdev, 2);
+ retval = pci_request_region(pdev, 2, "mxser(IO)");
+ if (retval)
+ goto err_dis;
+
+ brd->info = &mxser_cards[ent->driver_data];
+ for (i = 0; i < brd->info->nports; i++)
+ brd->ports[i].ioaddr = ioaddress + 8 * i;
+
+ /* vector */
+ ioaddress = pci_resource_start(pdev, 3);
+ retval = pci_request_region(pdev, 3, "mxser(vector)");
+ if (retval)
+ goto err_zero;
+ brd->vector = ioaddress;
+
+ /* irq */
+ brd->irq = pdev->irq;
+
+ brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
+ brd->uart_type = PORT_16550A;
+ brd->vector_mask = 0;
+
+ for (i = 0; i < brd->info->nports; i++) {
+ for (j = 0; j < UART_INFO_NUM; j++) {
+ if (Gpci_uart_info[j].type == brd->chip_flag) {
+ brd->ports[i].max_baud =
+ Gpci_uart_info[j].max_baud;
+
+ /* exception....CP-102 */
+ if (brd->info->flags & MXSER_HIGHBAUD)
+ brd->ports[i].max_baud = 921600;
+ break;
+ }
+ }
+ }
+
+ if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
+ for (i = 0; i < brd->info->nports; i++) {
+ if (i < 4)
+ brd->ports[i].opmode_ioaddr = ioaddress + 4;
+ else
+ brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
+ }
+ outb(0, ioaddress + 4); /* default set to RS232 mode */
+ outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
+ }
+
+ for (i = 0; i < brd->info->nports; i++) {
+ brd->vector_mask |= (1 << i);
+ brd->ports[i].baud_base = 921600;
+ }
+
+ /* mxser_initbrd will hook ISR. */
+ retval = mxser_initbrd(brd, pdev);
+ if (retval)
+ goto err_rel3;
+
+ for (i = 0; i < brd->info->nports; i++)
+ tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
+
+ pci_set_drvdata(pdev, brd);
+
+ return 0;
+err_rel3:
+ pci_release_region(pdev, 3);
+err_zero:
+ brd->info = NULL;
+ pci_release_region(pdev, 2);
+err_dis:
+ pci_disable_device(pdev);
+err:
+ return retval;
+#else
+ return -ENODEV;
+#endif
+}
+
+static void __devexit mxser_remove(struct pci_dev *pdev)
+{
+#ifdef CONFIG_PCI
+ struct mxser_board *brd = pci_get_drvdata(pdev);
+ unsigned int i;
+
+ for (i = 0; i < brd->info->nports; i++)
+ tty_unregister_device(mxvar_sdriver, brd->idx + i);
+
+ free_irq(pdev->irq, brd);
+ pci_release_region(pdev, 2);
+ pci_release_region(pdev, 3);
+ pci_disable_device(pdev);
+ brd->info = NULL;
+#endif
+}
+
+static struct pci_driver mxser_driver = {
+ .name = "mxser",
+ .id_table = mxser_pcibrds,
+ .probe = mxser_probe,
+ .remove = __devexit_p(mxser_remove)
+};
+
+static int __init mxser_module_init(void)
+{
+ struct mxser_board *brd;
+ unsigned int b, i, m;
+ int retval;
+
+ mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
+ if (!mxvar_sdriver)
+ return -ENOMEM;
+
+ printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
+ MXSER_VERSION);
+
+ /* Initialize the tty_driver structure */
+ mxvar_sdriver->owner = THIS_MODULE;
+ mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
+ mxvar_sdriver->name = "ttyMI";
+ mxvar_sdriver->major = ttymajor;
+ mxvar_sdriver->minor_start = 0;
+ mxvar_sdriver->num = MXSER_PORTS + 1;
+ mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
+ mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
+ mxvar_sdriver->init_termios = tty_std_termios;
+ mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
+ mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
+ tty_set_operations(mxvar_sdriver, &mxser_ops);
+
+ retval = tty_register_driver(mxvar_sdriver);
+ if (retval) {
+ printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
+ "tty driver !\n");
+ goto err_put;
+ }
+
+ /* Start finding ISA boards here */
+ for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
+ if (!ioaddr[b])
+ continue;
+
+ brd = &mxser_boards[m];
+ retval = mxser_get_ISA_conf(ioaddr[b], brd);
+ if (retval <= 0) {
+ brd->info = NULL;
+ continue;
+ }
+
+ printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
+ brd->info->name, ioaddr[b]);
+
+ /* mxser_initbrd will hook ISR. */
+ if (mxser_initbrd(brd, NULL) < 0) {
+ brd->info = NULL;
+ continue;
+ }
+
+ brd->idx = m * MXSER_PORTS_PER_BOARD;
+ for (i = 0; i < brd->info->nports; i++)
+ tty_register_device(mxvar_sdriver, brd->idx + i, NULL);
+
+ m++;
+ }
+
+ retval = pci_register_driver(&mxser_driver);
+ if (retval) {
+ printk(KERN_ERR "mxser: can't register pci driver\n");
+ if (!m) {
+ retval = -ENODEV;
+ goto err_unr;
+ } /* else: we have some ISA cards under control */
+ }
+
+ return 0;
+err_unr:
+ tty_unregister_driver(mxvar_sdriver);
+err_put:
+ put_tty_driver(mxvar_sdriver);
+ return retval;
+}
+
+static void __exit mxser_module_exit(void)
+{
+ unsigned int i, j;
+
+ pci_unregister_driver(&mxser_driver);
+
+ for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
+ if (mxser_boards[i].info != NULL)
+ for (j = 0; j < mxser_boards[i].info->nports; j++)
+ tty_unregister_device(mxvar_sdriver,
+ mxser_boards[i].idx + j);
+ tty_unregister_driver(mxvar_sdriver);
+ put_tty_driver(mxvar_sdriver);
+
+ for (i = 0; i < MXSER_BOARDS; i++)
+ if (mxser_boards[i].info != NULL)
+ mxser_release_ISA_res(&mxser_boards[i]);
+}
+
+module_init(mxser_module_init);
+module_exit(mxser_module_exit);
--- /dev/null
+#ifndef _MXSER_H
+#define _MXSER_H
+
+/*
+ * Semi-public control interfaces
+ */
+
+/*
+ * MOXA ioctls
+ */
+
+#define MOXA 0x400
+#define MOXA_GETDATACOUNT (MOXA + 23)
+#define MOXA_DIAGNOSE (MOXA + 50)
+#define MOXA_CHKPORTENABLE (MOXA + 60)
+#define MOXA_HighSpeedOn (MOXA + 61)
+#define MOXA_GET_MAJOR (MOXA + 63)
+#define MOXA_GETMSTATUS (MOXA + 65)
+#define MOXA_SET_OP_MODE (MOXA + 66)
+#define MOXA_GET_OP_MODE (MOXA + 67)
+
+#define RS232_MODE 0
+#define RS485_2WIRE_MODE 1
+#define RS422_MODE 2
+#define RS485_4WIRE_MODE 3
+#define OP_MODE_MASK 3
+
+#define MOXA_SDS_RSTICOUNTER (MOXA + 69)
+#define MOXA_ASPP_OQUEUE (MOXA + 70)
+#define MOXA_ASPP_MON (MOXA + 73)
+#define MOXA_ASPP_LSTATUS (MOXA + 74)
+#define MOXA_ASPP_MON_EXT (MOXA + 75)
+#define MOXA_SET_BAUD_METHOD (MOXA + 76)
+
+/* --------------------------------------------------- */
+
+#define NPPI_NOTIFY_PARITY 0x01
+#define NPPI_NOTIFY_FRAMING 0x02
+#define NPPI_NOTIFY_HW_OVERRUN 0x04
+#define NPPI_NOTIFY_SW_OVERRUN 0x08
+#define NPPI_NOTIFY_BREAK 0x10
+
+#define NPPI_NOTIFY_CTSHOLD 0x01 /* Tx hold by CTS low */
+#define NPPI_NOTIFY_DSRHOLD 0x02 /* Tx hold by DSR low */
+#define NPPI_NOTIFY_XOFFHOLD 0x08 /* Tx hold by Xoff received */
+#define NPPI_NOTIFY_XOFFXENT 0x10 /* Xoff Sent */
+
+/* follow just for Moxa Must chip define. */
+/* */
+/* when LCR register (offset 0x03) write following value, */
+/* the Must chip will enter enchance mode. And write value */
+/* on EFR (offset 0x02) bit 6,7 to change bank. */
+#define MOXA_MUST_ENTER_ENCHANCE 0xBF
+
+/* when enhance mode enable, access on general bank register */
+#define MOXA_MUST_GDL_REGISTER 0x07
+#define MOXA_MUST_GDL_MASK 0x7F
+#define MOXA_MUST_GDL_HAS_BAD_DATA 0x80
+
+#define MOXA_MUST_LSR_RERR 0x80 /* error in receive FIFO */
+/* enchance register bank select and enchance mode setting register */
+/* when LCR register equal to 0xBF */
+#define MOXA_MUST_EFR_REGISTER 0x02
+/* enchance mode enable */
+#define MOXA_MUST_EFR_EFRB_ENABLE 0x10
+/* enchance reister bank set 0, 1, 2 */
+#define MOXA_MUST_EFR_BANK0 0x00
+#define MOXA_MUST_EFR_BANK1 0x40
+#define MOXA_MUST_EFR_BANK2 0x80
+#define MOXA_MUST_EFR_BANK3 0xC0
+#define MOXA_MUST_EFR_BANK_MASK 0xC0
+
+/* set XON1 value register, when LCR=0xBF and change to bank0 */
+#define MOXA_MUST_XON1_REGISTER 0x04
+
+/* set XON2 value register, when LCR=0xBF and change to bank0 */
+#define MOXA_MUST_XON2_REGISTER 0x05
+
+/* set XOFF1 value register, when LCR=0xBF and change to bank0 */
+#define MOXA_MUST_XOFF1_REGISTER 0x06
+
+/* set XOFF2 value register, when LCR=0xBF and change to bank0 */
+#define MOXA_MUST_XOFF2_REGISTER 0x07
+
+#define MOXA_MUST_RBRTL_REGISTER 0x04
+#define MOXA_MUST_RBRTH_REGISTER 0x05
+#define MOXA_MUST_RBRTI_REGISTER 0x06
+#define MOXA_MUST_THRTL_REGISTER 0x07
+#define MOXA_MUST_ENUM_REGISTER 0x04
+#define MOXA_MUST_HWID_REGISTER 0x05
+#define MOXA_MUST_ECR_REGISTER 0x06
+#define MOXA_MUST_CSR_REGISTER 0x07
+
+/* good data mode enable */
+#define MOXA_MUST_FCR_GDA_MODE_ENABLE 0x20
+/* only good data put into RxFIFO */
+#define MOXA_MUST_FCR_GDA_ONLY_ENABLE 0x10
+
+/* enable CTS interrupt */
+#define MOXA_MUST_IER_ECTSI 0x80
+/* enable RTS interrupt */
+#define MOXA_MUST_IER_ERTSI 0x40
+/* enable Xon/Xoff interrupt */
+#define MOXA_MUST_IER_XINT 0x20
+/* enable GDA interrupt */
+#define MOXA_MUST_IER_EGDAI 0x10
+
+#define MOXA_MUST_RECV_ISR (UART_IER_RDI | MOXA_MUST_IER_EGDAI)
+
+/* GDA interrupt pending */
+#define MOXA_MUST_IIR_GDA 0x1C
+#define MOXA_MUST_IIR_RDA 0x04
+#define MOXA_MUST_IIR_RTO 0x0C
+#define MOXA_MUST_IIR_LSR 0x06
+
+/* recieved Xon/Xoff or specical interrupt pending */
+#define MOXA_MUST_IIR_XSC 0x10
+
+/* RTS/CTS change state interrupt pending */
+#define MOXA_MUST_IIR_RTSCTS 0x20
+#define MOXA_MUST_IIR_MASK 0x3E
+
+#define MOXA_MUST_MCR_XON_FLAG 0x40
+#define MOXA_MUST_MCR_XON_ANY 0x80
+#define MOXA_MUST_MCR_TX_XON 0x08
+
+/* software flow control on chip mask value */
+#define MOXA_MUST_EFR_SF_MASK 0x0F
+/* send Xon1/Xoff1 */
+#define MOXA_MUST_EFR_SF_TX1 0x08
+/* send Xon2/Xoff2 */
+#define MOXA_MUST_EFR_SF_TX2 0x04
+/* send Xon1,Xon2/Xoff1,Xoff2 */
+#define MOXA_MUST_EFR_SF_TX12 0x0C
+/* don't send Xon/Xoff */
+#define MOXA_MUST_EFR_SF_TX_NO 0x00
+/* Tx software flow control mask */
+#define MOXA_MUST_EFR_SF_TX_MASK 0x0C
+/* don't receive Xon/Xoff */
+#define MOXA_MUST_EFR_SF_RX_NO 0x00
+/* receive Xon1/Xoff1 */
+#define MOXA_MUST_EFR_SF_RX1 0x02
+/* receive Xon2/Xoff2 */
+#define MOXA_MUST_EFR_SF_RX2 0x01
+/* receive Xon1,Xon2/Xoff1,Xoff2 */
+#define MOXA_MUST_EFR_SF_RX12 0x03
+/* Rx software flow control mask */
+#define MOXA_MUST_EFR_SF_RX_MASK 0x03
+
+#endif
--- /dev/null
+/*
+ * nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter
+ *
+ * Written by: Ulf Jakobsson,
+ * Jan Åkerfeldt,
+ * Stefan Thomasson,
+ *
+ * Maintained by: Paul Hardwick (p.hardwick@option.com)
+ *
+ * Patches:
+ * Locking code changes for Vodafone by Sphere Systems Ltd,
+ * Andrew Bird (ajb@spheresystems.co.uk )
+ * & Phil Sanderson
+ *
+ * Source has been ported from an implementation made by Filip Aben @ Option
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Copyright (c) 2005,2006 Option Wireless Sweden AB
+ * Copyright (c) 2006 Sphere Systems Ltd
+ * Copyright (c) 2006 Option Wireless n/v
+ * All rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * --------------------------------------------------------------------------
+ */
+
+/* Enable this to have a lot of debug printouts */
+#define DEBUG
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/ioport.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/sched.h>
+#include <linux/serial.h>
+#include <linux/interrupt.h>
+#include <linux/kmod.h>
+#include <linux/init.h>
+#include <linux/kfifo.h>
+#include <linux/uaccess.h>
+#include <linux/slab.h>
+#include <asm/byteorder.h>
+
+#include <linux/delay.h>
+
+
+#define VERSION_STRING DRIVER_DESC " 2.1d (build date: " \
+ __DATE__ " " __TIME__ ")"
+
+/* Macros definitions */
+
+/* Default debug printout level */
+#define NOZOMI_DEBUG_LEVEL 0x00
+
+#define P_BUF_SIZE 128
+#define NFO(_err_flag_, args...) \
+do { \
+ char tmp[P_BUF_SIZE]; \
+ snprintf(tmp, sizeof(tmp), ##args); \
+ printk(_err_flag_ "[%d] %s(): %s\n", __LINE__, \
+ __func__, tmp); \
+} while (0)
+
+#define DBG1(args...) D_(0x01, ##args)
+#define DBG2(args...) D_(0x02, ##args)
+#define DBG3(args...) D_(0x04, ##args)
+#define DBG4(args...) D_(0x08, ##args)
+#define DBG5(args...) D_(0x10, ##args)
+#define DBG6(args...) D_(0x20, ##args)
+#define DBG7(args...) D_(0x40, ##args)
+#define DBG8(args...) D_(0x80, ##args)
+
+#ifdef DEBUG
+/* Do we need this settable at runtime? */
+static int debug = NOZOMI_DEBUG_LEVEL;
+
+#define D(lvl, args...) do \
+ {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \
+ while (0)
+#define D_(lvl, args...) D(lvl, ##args)
+
+/* These printouts are always printed */
+
+#else
+static int debug;
+#define D_(lvl, args...)
+#endif
+
+/* TODO: rewrite to optimize macros... */
+
+#define TMP_BUF_MAX 256
+
+#define DUMP(buf__,len__) \
+ do { \
+ char tbuf[TMP_BUF_MAX] = {0};\
+ if (len__ > 1) {\
+ snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\
+ if (tbuf[len__-2] == '\r') {\
+ tbuf[len__-2] = 'r';\
+ } \
+ DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\
+ } else {\
+ DBG1("SENDING: '%s' (%d)", tbuf, len__);\
+ } \
+} while (0)
+
+/* Defines */
+#define NOZOMI_NAME "nozomi"
+#define NOZOMI_NAME_TTY "nozomi_tty"
+#define DRIVER_DESC "Nozomi driver"
+
+#define NTTY_TTY_MAXMINORS 256
+#define NTTY_FIFO_BUFFER_SIZE 8192
+
+/* Must be power of 2 */
+#define FIFO_BUFFER_SIZE_UL 8192
+
+/* Size of tmp send buffer to card */
+#define SEND_BUF_MAX 1024
+#define RECEIVE_BUF_MAX 4
+
+
+#define R_IIR 0x0000 /* Interrupt Identity Register */
+#define R_FCR 0x0000 /* Flow Control Register */
+#define R_IER 0x0004 /* Interrupt Enable Register */
+
+#define CONFIG_MAGIC 0xEFEFFEFE
+#define TOGGLE_VALID 0x0000
+
+/* Definition of interrupt tokens */
+#define MDM_DL1 0x0001
+#define MDM_UL1 0x0002
+#define MDM_DL2 0x0004
+#define MDM_UL2 0x0008
+#define DIAG_DL1 0x0010
+#define DIAG_DL2 0x0020
+#define DIAG_UL 0x0040
+#define APP1_DL 0x0080
+#define APP1_UL 0x0100
+#define APP2_DL 0x0200
+#define APP2_UL 0x0400
+#define CTRL_DL 0x0800
+#define CTRL_UL 0x1000
+#define RESET 0x8000
+
+#define MDM_DL (MDM_DL1 | MDM_DL2)
+#define MDM_UL (MDM_UL1 | MDM_UL2)
+#define DIAG_DL (DIAG_DL1 | DIAG_DL2)
+
+/* modem signal definition */
+#define CTRL_DSR 0x0001
+#define CTRL_DCD 0x0002
+#define CTRL_RI 0x0004
+#define CTRL_CTS 0x0008
+
+#define CTRL_DTR 0x0001
+#define CTRL_RTS 0x0002
+
+#define MAX_PORT 4
+#define NOZOMI_MAX_PORTS 5
+#define NOZOMI_MAX_CARDS (NTTY_TTY_MAXMINORS / MAX_PORT)
+
+/* Type definitions */
+
+/*
+ * There are two types of nozomi cards,
+ * one with 2048 memory and with 8192 memory
+ */
+enum card_type {
+ F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */
+ F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */
+};
+
+/* Initialization states a card can be in */
+enum card_state {
+ NOZOMI_STATE_UKNOWN = 0,
+ NOZOMI_STATE_ENABLED = 1, /* pci device enabled */
+ NOZOMI_STATE_ALLOCATED = 2, /* config setup done */
+ NOZOMI_STATE_READY = 3, /* flowcontrols received */
+};
+
+/* Two different toggle channels exist */
+enum channel_type {
+ CH_A = 0,
+ CH_B = 1,
+};
+
+/* Port definition for the card regarding flow control */
+enum ctrl_port_type {
+ CTRL_CMD = 0,
+ CTRL_MDM = 1,
+ CTRL_DIAG = 2,
+ CTRL_APP1 = 3,
+ CTRL_APP2 = 4,
+ CTRL_ERROR = -1,
+};
+
+/* Ports that the nozomi has */
+enum port_type {
+ PORT_MDM = 0,
+ PORT_DIAG = 1,
+ PORT_APP1 = 2,
+ PORT_APP2 = 3,
+ PORT_CTRL = 4,
+ PORT_ERROR = -1,
+};
+
+#ifdef __BIG_ENDIAN
+/* Big endian */
+
+struct toggles {
+ unsigned int enabled:5; /*
+ * Toggle fields are valid if enabled is 0,
+ * else A-channels must always be used.
+ */
+ unsigned int diag_dl:1;
+ unsigned int mdm_dl:1;
+ unsigned int mdm_ul:1;
+} __attribute__ ((packed));
+
+/* Configuration table to read at startup of card */
+/* Is for now only needed during initialization phase */
+struct config_table {
+ u32 signature;
+ u16 product_information;
+ u16 version;
+ u8 pad3[3];
+ struct toggles toggle;
+ u8 pad1[4];
+ u16 dl_mdm_len1; /*
+ * If this is 64, it can hold
+ * 60 bytes + 4 that is length field
+ */
+ u16 dl_start;
+
+ u16 dl_diag_len1;
+ u16 dl_mdm_len2; /*
+ * If this is 64, it can hold
+ * 60 bytes + 4 that is length field
+ */
+ u16 dl_app1_len;
+
+ u16 dl_diag_len2;
+ u16 dl_ctrl_len;
+ u16 dl_app2_len;
+ u8 pad2[16];
+ u16 ul_mdm_len1;
+ u16 ul_start;
+ u16 ul_diag_len;
+ u16 ul_mdm_len2;
+ u16 ul_app1_len;
+ u16 ul_app2_len;
+ u16 ul_ctrl_len;
+} __attribute__ ((packed));
+
+/* This stores all control downlink flags */
+struct ctrl_dl {
+ u8 port;
+ unsigned int reserved:4;
+ unsigned int CTS:1;
+ unsigned int RI:1;
+ unsigned int DCD:1;
+ unsigned int DSR:1;
+} __attribute__ ((packed));
+
+/* This stores all control uplink flags */
+struct ctrl_ul {
+ u8 port;
+ unsigned int reserved:6;
+ unsigned int RTS:1;
+ unsigned int DTR:1;
+} __attribute__ ((packed));
+
+#else
+/* Little endian */
+
+/* This represents the toggle information */
+struct toggles {
+ unsigned int mdm_ul:1;
+ unsigned int mdm_dl:1;
+ unsigned int diag_dl:1;
+ unsigned int enabled:5; /*
+ * Toggle fields are valid if enabled is 0,
+ * else A-channels must always be used.
+ */
+} __attribute__ ((packed));
+
+/* Configuration table to read at startup of card */
+struct config_table {
+ u32 signature;
+ u16 version;
+ u16 product_information;
+ struct toggles toggle;
+ u8 pad1[7];
+ u16 dl_start;
+ u16 dl_mdm_len1; /*
+ * If this is 64, it can hold
+ * 60 bytes + 4 that is length field
+ */
+ u16 dl_mdm_len2;
+ u16 dl_diag_len1;
+ u16 dl_diag_len2;
+ u16 dl_app1_len;
+ u16 dl_app2_len;
+ u16 dl_ctrl_len;
+ u8 pad2[16];
+ u16 ul_start;
+ u16 ul_mdm_len2;
+ u16 ul_mdm_len1;
+ u16 ul_diag_len;
+ u16 ul_app1_len;
+ u16 ul_app2_len;
+ u16 ul_ctrl_len;
+} __attribute__ ((packed));
+
+/* This stores all control downlink flags */
+struct ctrl_dl {
+ unsigned int DSR:1;
+ unsigned int DCD:1;
+ unsigned int RI:1;
+ unsigned int CTS:1;
+ unsigned int reserverd:4;
+ u8 port;
+} __attribute__ ((packed));
+
+/* This stores all control uplink flags */
+struct ctrl_ul {
+ unsigned int DTR:1;
+ unsigned int RTS:1;
+ unsigned int reserved:6;
+ u8 port;
+} __attribute__ ((packed));
+#endif
+
+/* This holds all information that is needed regarding a port */
+struct port {
+ struct tty_port port;
+ u8 update_flow_control;
+ struct ctrl_ul ctrl_ul;
+ struct ctrl_dl ctrl_dl;
+ struct kfifo fifo_ul;
+ void __iomem *dl_addr[2];
+ u32 dl_size[2];
+ u8 toggle_dl;
+ void __iomem *ul_addr[2];
+ u32 ul_size[2];
+ u8 toggle_ul;
+ u16 token_dl;
+
+ /* mutex to ensure one access patch to this port */
+ struct mutex tty_sem;
+ wait_queue_head_t tty_wait;
+ struct async_icount tty_icount;
+
+ struct nozomi *dc;
+};
+
+/* Private data one for each card in the system */
+struct nozomi {
+ void __iomem *base_addr;
+ unsigned long flip;
+
+ /* Pointers to registers */
+ void __iomem *reg_iir;
+ void __iomem *reg_fcr;
+ void __iomem *reg_ier;
+
+ u16 last_ier;
+ enum card_type card_type;
+ struct config_table config_table; /* Configuration table */
+ struct pci_dev *pdev;
+ struct port port[NOZOMI_MAX_PORTS];
+ u8 *send_buf;
+
+ spinlock_t spin_mutex; /* secures access to registers and tty */
+
+ unsigned int index_start;
+ enum card_state state;
+ u32 open_ttys;
+};
+
+/* This is a data packet that is read or written to/from card */
+struct buffer {
+ u32 size; /* size is the length of the data buffer */
+ u8 *data;
+} __attribute__ ((packed));
+
+/* Global variables */
+static const struct pci_device_id nozomi_pci_tbl[] __devinitconst = {
+ {PCI_DEVICE(0x1931, 0x000c)}, /* Nozomi HSDPA */
+ {},
+};
+
+MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl);
+
+static struct nozomi *ndevs[NOZOMI_MAX_CARDS];
+static struct tty_driver *ntty_driver;
+
+static const struct tty_port_operations noz_tty_port_ops;
+
+/*
+ * find card by tty_index
+ */
+static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty)
+{
+ return tty ? ndevs[tty->index / MAX_PORT] : NULL;
+}
+
+static inline struct port *get_port_by_tty(const struct tty_struct *tty)
+{
+ struct nozomi *ndev = get_dc_by_tty(tty);
+ return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL;
+}
+
+/*
+ * TODO:
+ * -Optimize
+ * -Rewrite cleaner
+ */
+
+static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
+ u32 size_bytes)
+{
+ u32 i = 0;
+ const u32 __iomem *ptr = mem_addr_start;
+ u16 *buf16;
+
+ if (unlikely(!ptr || !buf))
+ goto out;
+
+ /* shortcut for extremely often used cases */
+ switch (size_bytes) {
+ case 2: /* 2 bytes */
+ buf16 = (u16 *) buf;
+ *buf16 = __le16_to_cpu(readw(ptr));
+ goto out;
+ break;
+ case 4: /* 4 bytes */
+ *(buf) = __le32_to_cpu(readl(ptr));
+ goto out;
+ break;
+ }
+
+ while (i < size_bytes) {
+ if (size_bytes - i == 2) {
+ /* Handle 2 bytes in the end */
+ buf16 = (u16 *) buf;
+ *(buf16) = __le16_to_cpu(readw(ptr));
+ i += 2;
+ } else {
+ /* Read 4 bytes */
+ *(buf) = __le32_to_cpu(readl(ptr));
+ i += 4;
+ }
+ buf++;
+ ptr++;
+ }
+out:
+ return;
+}
+
+/*
+ * TODO:
+ * -Optimize
+ * -Rewrite cleaner
+ */
+static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
+ u32 size_bytes)
+{
+ u32 i = 0;
+ u32 __iomem *ptr = mem_addr_start;
+ const u16 *buf16;
+
+ if (unlikely(!ptr || !buf))
+ return 0;
+
+ /* shortcut for extremely often used cases */
+ switch (size_bytes) {
+ case 2: /* 2 bytes */
+ buf16 = (const u16 *)buf;
+ writew(__cpu_to_le16(*buf16), ptr);
+ return 2;
+ break;
+ case 1: /*
+ * also needs to write 4 bytes in this case
+ * so falling through..
+ */
+ case 4: /* 4 bytes */
+ writel(__cpu_to_le32(*buf), ptr);
+ return 4;
+ break;
+ }
+
+ while (i < size_bytes) {
+ if (size_bytes - i == 2) {
+ /* 2 bytes */
+ buf16 = (const u16 *)buf;
+ writew(__cpu_to_le16(*buf16), ptr);
+ i += 2;
+ } else {
+ /* 4 bytes */
+ writel(__cpu_to_le32(*buf), ptr);
+ i += 4;
+ }
+ buf++;
+ ptr++;
+ }
+ return i;
+}
+
+/* Setup pointers to different channels and also setup buffer sizes. */
+static void setup_memory(struct nozomi *dc)
+{
+ void __iomem *offset = dc->base_addr + dc->config_table.dl_start;
+ /* The length reported is including the length field of 4 bytes,
+ * hence subtract with 4.
+ */
+ const u16 buff_offset = 4;
+
+ /* Modem port dl configuration */
+ dc->port[PORT_MDM].dl_addr[CH_A] = offset;
+ dc->port[PORT_MDM].dl_addr[CH_B] =
+ (offset += dc->config_table.dl_mdm_len1);
+ dc->port[PORT_MDM].dl_size[CH_A] =
+ dc->config_table.dl_mdm_len1 - buff_offset;
+ dc->port[PORT_MDM].dl_size[CH_B] =
+ dc->config_table.dl_mdm_len2 - buff_offset;
+
+ /* Diag port dl configuration */
+ dc->port[PORT_DIAG].dl_addr[CH_A] =
+ (offset += dc->config_table.dl_mdm_len2);
+ dc->port[PORT_DIAG].dl_size[CH_A] =
+ dc->config_table.dl_diag_len1 - buff_offset;
+ dc->port[PORT_DIAG].dl_addr[CH_B] =
+ (offset += dc->config_table.dl_diag_len1);
+ dc->port[PORT_DIAG].dl_size[CH_B] =
+ dc->config_table.dl_diag_len2 - buff_offset;
+
+ /* App1 port dl configuration */
+ dc->port[PORT_APP1].dl_addr[CH_A] =
+ (offset += dc->config_table.dl_diag_len2);
+ dc->port[PORT_APP1].dl_size[CH_A] =
+ dc->config_table.dl_app1_len - buff_offset;
+
+ /* App2 port dl configuration */
+ dc->port[PORT_APP2].dl_addr[CH_A] =
+ (offset += dc->config_table.dl_app1_len);
+ dc->port[PORT_APP2].dl_size[CH_A] =
+ dc->config_table.dl_app2_len - buff_offset;
+
+ /* Ctrl dl configuration */
+ dc->port[PORT_CTRL].dl_addr[CH_A] =
+ (offset += dc->config_table.dl_app2_len);
+ dc->port[PORT_CTRL].dl_size[CH_A] =
+ dc->config_table.dl_ctrl_len - buff_offset;
+
+ offset = dc->base_addr + dc->config_table.ul_start;
+
+ /* Modem Port ul configuration */
+ dc->port[PORT_MDM].ul_addr[CH_A] = offset;
+ dc->port[PORT_MDM].ul_size[CH_A] =
+ dc->config_table.ul_mdm_len1 - buff_offset;
+ dc->port[PORT_MDM].ul_addr[CH_B] =
+ (offset += dc->config_table.ul_mdm_len1);
+ dc->port[PORT_MDM].ul_size[CH_B] =
+ dc->config_table.ul_mdm_len2 - buff_offset;
+
+ /* Diag port ul configuration */
+ dc->port[PORT_DIAG].ul_addr[CH_A] =
+ (offset += dc->config_table.ul_mdm_len2);
+ dc->port[PORT_DIAG].ul_size[CH_A] =
+ dc->config_table.ul_diag_len - buff_offset;
+
+ /* App1 port ul configuration */
+ dc->port[PORT_APP1].ul_addr[CH_A] =
+ (offset += dc->config_table.ul_diag_len);
+ dc->port[PORT_APP1].ul_size[CH_A] =
+ dc->config_table.ul_app1_len - buff_offset;
+
+ /* App2 port ul configuration */
+ dc->port[PORT_APP2].ul_addr[CH_A] =
+ (offset += dc->config_table.ul_app1_len);
+ dc->port[PORT_APP2].ul_size[CH_A] =
+ dc->config_table.ul_app2_len - buff_offset;
+
+ /* Ctrl ul configuration */
+ dc->port[PORT_CTRL].ul_addr[CH_A] =
+ (offset += dc->config_table.ul_app2_len);
+ dc->port[PORT_CTRL].ul_size[CH_A] =
+ dc->config_table.ul_ctrl_len - buff_offset;
+}
+
+/* Dump config table under initalization phase */
+#ifdef DEBUG
+static void dump_table(const struct nozomi *dc)
+{
+ DBG3("signature: 0x%08X", dc->config_table.signature);
+ DBG3("version: 0x%04X", dc->config_table.version);
+ DBG3("product_information: 0x%04X", \
+ dc->config_table.product_information);
+ DBG3("toggle enabled: %d", dc->config_table.toggle.enabled);
+ DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul);
+ DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl);
+ DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl);
+
+ DBG3("dl_start: 0x%04X", dc->config_table.dl_start);
+ DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1,
+ dc->config_table.dl_mdm_len1);
+ DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2,
+ dc->config_table.dl_mdm_len2);
+ DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1,
+ dc->config_table.dl_diag_len1);
+ DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2,
+ dc->config_table.dl_diag_len2);
+ DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len,
+ dc->config_table.dl_app1_len);
+ DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len,
+ dc->config_table.dl_app2_len);
+ DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len,
+ dc->config_table.dl_ctrl_len);
+ DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start,
+ dc->config_table.ul_start);
+ DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1,
+ dc->config_table.ul_mdm_len1);
+ DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2,
+ dc->config_table.ul_mdm_len2);
+ DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len,
+ dc->config_table.ul_diag_len);
+ DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len,
+ dc->config_table.ul_app1_len);
+ DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len,
+ dc->config_table.ul_app2_len);
+ DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len,
+ dc->config_table.ul_ctrl_len);
+}
+#else
+static inline void dump_table(const struct nozomi *dc) { }
+#endif
+
+/*
+ * Read configuration table from card under intalization phase
+ * Returns 1 if ok, else 0
+ */
+static int nozomi_read_config_table(struct nozomi *dc)
+{
+ read_mem32((u32 *) &dc->config_table, dc->base_addr + 0,
+ sizeof(struct config_table));
+
+ if (dc->config_table.signature != CONFIG_MAGIC) {
+ dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n",
+ dc->config_table.signature, CONFIG_MAGIC);
+ return 0;
+ }
+
+ if ((dc->config_table.version == 0)
+ || (dc->config_table.toggle.enabled == TOGGLE_VALID)) {
+ int i;
+ DBG1("Second phase, configuring card");
+
+ setup_memory(dc);
+
+ dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul;
+ dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl;
+ dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl;
+ DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d",
+ dc->port[PORT_MDM].toggle_ul,
+ dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl);
+
+ dump_table(dc);
+
+ for (i = PORT_MDM; i < MAX_PORT; i++) {
+ memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
+ memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
+ }
+
+ /* Enable control channel */
+ dc->last_ier = dc->last_ier | CTRL_DL;
+ writew(dc->last_ier, dc->reg_ier);
+
+ dc->state = NOZOMI_STATE_ALLOCATED;
+ dev_info(&dc->pdev->dev, "Initialization OK!\n");
+ return 1;
+ }
+
+ if ((dc->config_table.version > 0)
+ && (dc->config_table.toggle.enabled != TOGGLE_VALID)) {
+ u32 offset = 0;
+ DBG1("First phase: pushing upload buffers, clearing download");
+
+ dev_info(&dc->pdev->dev, "Version of card: %d\n",
+ dc->config_table.version);
+
+ /* Here we should disable all I/O over F32. */
+ setup_memory(dc);
+
+ /*
+ * We should send ALL channel pair tokens back along
+ * with reset token
+ */
+
+ /* push upload modem buffers */
+ write_mem32(dc->port[PORT_MDM].ul_addr[CH_A],
+ (u32 *) &offset, 4);
+ write_mem32(dc->port[PORT_MDM].ul_addr[CH_B],
+ (u32 *) &offset, 4);
+
+ writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr);
+
+ DBG1("First phase done");
+ }
+
+ return 1;
+}
+
+/* Enable uplink interrupts */
+static void enable_transmit_ul(enum port_type port, struct nozomi *dc)
+{
+ static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL};
+
+ if (port < NOZOMI_MAX_PORTS) {
+ dc->last_ier |= mask[port];
+ writew(dc->last_ier, dc->reg_ier);
+ } else {
+ dev_err(&dc->pdev->dev, "Called with wrong port?\n");
+ }
+}
+
+/* Disable uplink interrupts */
+static void disable_transmit_ul(enum port_type port, struct nozomi *dc)
+{
+ static const u16 mask[] =
+ {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL};
+
+ if (port < NOZOMI_MAX_PORTS) {
+ dc->last_ier &= mask[port];
+ writew(dc->last_ier, dc->reg_ier);
+ } else {
+ dev_err(&dc->pdev->dev, "Called with wrong port?\n");
+ }
+}
+
+/* Enable downlink interrupts */
+static void enable_transmit_dl(enum port_type port, struct nozomi *dc)
+{
+ static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL};
+
+ if (port < NOZOMI_MAX_PORTS) {
+ dc->last_ier |= mask[port];
+ writew(dc->last_ier, dc->reg_ier);
+ } else {
+ dev_err(&dc->pdev->dev, "Called with wrong port?\n");
+ }
+}
+
+/* Disable downlink interrupts */
+static void disable_transmit_dl(enum port_type port, struct nozomi *dc)
+{
+ static const u16 mask[] =
+ {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL};
+
+ if (port < NOZOMI_MAX_PORTS) {
+ dc->last_ier &= mask[port];
+ writew(dc->last_ier, dc->reg_ier);
+ } else {
+ dev_err(&dc->pdev->dev, "Called with wrong port?\n");
+ }
+}
+
+/*
+ * Return 1 - send buffer to card and ack.
+ * Return 0 - don't ack, don't send buffer to card.
+ */
+static int send_data(enum port_type index, struct nozomi *dc)
+{
+ u32 size = 0;
+ struct port *port = &dc->port[index];
+ const u8 toggle = port->toggle_ul;
+ void __iomem *addr = port->ul_addr[toggle];
+ const u32 ul_size = port->ul_size[toggle];
+ struct tty_struct *tty = tty_port_tty_get(&port->port);
+
+ /* Get data from tty and place in buf for now */
+ size = kfifo_out(&port->fifo_ul, dc->send_buf,
+ ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX);
+
+ if (size == 0) {
+ DBG4("No more data to send, disable link:");
+ tty_kref_put(tty);
+ return 0;
+ }
+
+ /* DUMP(buf, size); */
+
+ /* Write length + data */
+ write_mem32(addr, (u32 *) &size, 4);
+ write_mem32(addr + 4, (u32 *) dc->send_buf, size);
+
+ if (tty)
+ tty_wakeup(tty);
+
+ tty_kref_put(tty);
+ return 1;
+}
+
+/* If all data has been read, return 1, else 0 */
+static int receive_data(enum port_type index, struct nozomi *dc)
+{
+ u8 buf[RECEIVE_BUF_MAX] = { 0 };
+ int size;
+ u32 offset = 4;
+ struct port *port = &dc->port[index];
+ void __iomem *addr = port->dl_addr[port->toggle_dl];
+ struct tty_struct *tty = tty_port_tty_get(&port->port);
+ int i, ret;
+
+ if (unlikely(!tty)) {
+ DBG1("tty not open for port: %d?", index);
+ return 1;
+ }
+
+ read_mem32((u32 *) &size, addr, 4);
+ /* DBG1( "%d bytes port: %d", size, index); */
+
+ if (test_bit(TTY_THROTTLED, &tty->flags)) {
+ DBG1("No room in tty, don't read data, don't ack interrupt, "
+ "disable interrupt");
+
+ /* disable interrupt in downlink... */
+ disable_transmit_dl(index, dc);
+ ret = 0;
+ goto put;
+ }
+
+ if (unlikely(size == 0)) {
+ dev_err(&dc->pdev->dev, "size == 0?\n");
+ ret = 1;
+ goto put;
+ }
+
+ while (size > 0) {
+ read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
+
+ if (size == 1) {
+ tty_insert_flip_char(tty, buf[0], TTY_NORMAL);
+ size = 0;
+ } else if (size < RECEIVE_BUF_MAX) {
+ size -= tty_insert_flip_string(tty, (char *) buf, size);
+ } else {
+ i = tty_insert_flip_string(tty, \
+ (char *) buf, RECEIVE_BUF_MAX);
+ size -= i;
+ offset += i;
+ }
+ }
+
+ set_bit(index, &dc->flip);
+ ret = 1;
+put:
+ tty_kref_put(tty);
+ return ret;
+}
+
+/* Debug for interrupts */
+#ifdef DEBUG
+static char *interrupt2str(u16 interrupt)
+{
+ static char buf[TMP_BUF_MAX];
+ char *p = buf;
+
+ interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
+ interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "MDM_DL2 ") : NULL;
+
+ interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "MDM_UL1 ") : NULL;
+ interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "MDM_UL2 ") : NULL;
+
+ interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "DIAG_DL1 ") : NULL;
+ interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "DIAG_DL2 ") : NULL;
+
+ interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "DIAG_UL ") : NULL;
+
+ interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "APP1_DL ") : NULL;
+ interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "APP2_DL ") : NULL;
+
+ interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "APP1_UL ") : NULL;
+ interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "APP2_UL ") : NULL;
+
+ interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "CTRL_DL ") : NULL;
+ interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "CTRL_UL ") : NULL;
+
+ interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
+ "RESET ") : NULL;
+
+ return buf;
+}
+#endif
+
+/*
+ * Receive flow control
+ * Return 1 - If ok, else 0
+ */
+static int receive_flow_control(struct nozomi *dc)
+{
+ enum port_type port = PORT_MDM;
+ struct ctrl_dl ctrl_dl;
+ struct ctrl_dl old_ctrl;
+ u16 enable_ier = 0;
+
+ read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
+
+ switch (ctrl_dl.port) {
+ case CTRL_CMD:
+ DBG1("The Base Band sends this value as a response to a "
+ "request for IMSI detach sent over the control "
+ "channel uplink (see section 7.6.1).");
+ break;
+ case CTRL_MDM:
+ port = PORT_MDM;
+ enable_ier = MDM_DL;
+ break;
+ case CTRL_DIAG:
+ port = PORT_DIAG;
+ enable_ier = DIAG_DL;
+ break;
+ case CTRL_APP1:
+ port = PORT_APP1;
+ enable_ier = APP1_DL;
+ break;
+ case CTRL_APP2:
+ port = PORT_APP2;
+ enable_ier = APP2_DL;
+ if (dc->state == NOZOMI_STATE_ALLOCATED) {
+ /*
+ * After card initialization the flow control
+ * received for APP2 is always the last
+ */
+ dc->state = NOZOMI_STATE_READY;
+ dev_info(&dc->pdev->dev, "Device READY!\n");
+ }
+ break;
+ default:
+ dev_err(&dc->pdev->dev,
+ "ERROR: flow control received for non-existing port\n");
+ return 0;
+ };
+
+ DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
+ *((u16 *)&ctrl_dl));
+
+ old_ctrl = dc->port[port].ctrl_dl;
+ dc->port[port].ctrl_dl = ctrl_dl;
+
+ if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
+ DBG1("Disable interrupt (0x%04X) on port: %d",
+ enable_ier, port);
+ disable_transmit_ul(port, dc);
+
+ } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
+
+ if (kfifo_len(&dc->port[port].fifo_ul)) {
+ DBG1("Enable interrupt (0x%04X) on port: %d",
+ enable_ier, port);
+ DBG1("Data in buffer [%d], enable transmit! ",
+ kfifo_len(&dc->port[port].fifo_ul));
+ enable_transmit_ul(port, dc);
+ } else {
+ DBG1("No data in buffer...");
+ }
+ }
+
+ if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
+ DBG1(" No change in mctrl");
+ return 1;
+ }
+ /* Update statistics */
+ if (old_ctrl.CTS != ctrl_dl.CTS)
+ dc->port[port].tty_icount.cts++;
+ if (old_ctrl.DSR != ctrl_dl.DSR)
+ dc->port[port].tty_icount.dsr++;
+ if (old_ctrl.RI != ctrl_dl.RI)
+ dc->port[port].tty_icount.rng++;
+ if (old_ctrl.DCD != ctrl_dl.DCD)
+ dc->port[port].tty_icount.dcd++;
+
+ wake_up_interruptible(&dc->port[port].tty_wait);
+
+ DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
+ port,
+ dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
+ dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
+
+ return 1;
+}
+
+static enum ctrl_port_type port2ctrl(enum port_type port,
+ const struct nozomi *dc)
+{
+ switch (port) {
+ case PORT_MDM:
+ return CTRL_MDM;
+ case PORT_DIAG:
+ return CTRL_DIAG;
+ case PORT_APP1:
+ return CTRL_APP1;
+ case PORT_APP2:
+ return CTRL_APP2;
+ default:
+ dev_err(&dc->pdev->dev,
+ "ERROR: send flow control " \
+ "received for non-existing port\n");
+ };
+ return CTRL_ERROR;
+}
+
+/*
+ * Send flow control, can only update one channel at a time
+ * Return 0 - If we have updated all flow control
+ * Return 1 - If we need to update more flow control, ack current enable more
+ */
+static int send_flow_control(struct nozomi *dc)
+{
+ u32 i, more_flow_control_to_be_updated = 0;
+ u16 *ctrl;
+
+ for (i = PORT_MDM; i < MAX_PORT; i++) {
+ if (dc->port[i].update_flow_control) {
+ if (more_flow_control_to_be_updated) {
+ /* We have more flow control to be updated */
+ return 1;
+ }
+ dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
+ ctrl = (u16 *)&dc->port[i].ctrl_ul;
+ write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
+ (u32 *) ctrl, 2);
+ dc->port[i].update_flow_control = 0;
+ more_flow_control_to_be_updated = 1;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Handle downlink data, ports that are handled are modem and diagnostics
+ * Return 1 - ok
+ * Return 0 - toggle fields are out of sync
+ */
+static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle,
+ u16 read_iir, u16 mask1, u16 mask2)
+{
+ if (*toggle == 0 && read_iir & mask1) {
+ if (receive_data(port, dc)) {
+ writew(mask1, dc->reg_fcr);
+ *toggle = !(*toggle);
+ }
+
+ if (read_iir & mask2) {
+ if (receive_data(port, dc)) {
+ writew(mask2, dc->reg_fcr);
+ *toggle = !(*toggle);
+ }
+ }
+ } else if (*toggle == 1 && read_iir & mask2) {
+ if (receive_data(port, dc)) {
+ writew(mask2, dc->reg_fcr);
+ *toggle = !(*toggle);
+ }
+
+ if (read_iir & mask1) {
+ if (receive_data(port, dc)) {
+ writew(mask1, dc->reg_fcr);
+ *toggle = !(*toggle);
+ }
+ }
+ } else {
+ dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
+ *toggle);
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * Handle uplink data, this is currently for the modem port
+ * Return 1 - ok
+ * Return 0 - toggle field are out of sync
+ */
+static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir)
+{
+ u8 *toggle = &(dc->port[port].toggle_ul);
+
+ if (*toggle == 0 && read_iir & MDM_UL1) {
+ dc->last_ier &= ~MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(port, dc)) {
+ writew(MDM_UL1, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ *toggle = !*toggle;
+ }
+
+ if (read_iir & MDM_UL2) {
+ dc->last_ier &= ~MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(port, dc)) {
+ writew(MDM_UL2, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ *toggle = !*toggle;
+ }
+ }
+
+ } else if (*toggle == 1 && read_iir & MDM_UL2) {
+ dc->last_ier &= ~MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(port, dc)) {
+ writew(MDM_UL2, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ *toggle = !*toggle;
+ }
+
+ if (read_iir & MDM_UL1) {
+ dc->last_ier &= ~MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(port, dc)) {
+ writew(MDM_UL1, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | MDM_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ *toggle = !*toggle;
+ }
+ }
+ } else {
+ writew(read_iir & MDM_UL, dc->reg_fcr);
+ dev_err(&dc->pdev->dev, "port out of sync!\n");
+ return 0;
+ }
+ return 1;
+}
+
+static irqreturn_t interrupt_handler(int irq, void *dev_id)
+{
+ struct nozomi *dc = dev_id;
+ unsigned int a;
+ u16 read_iir;
+
+ if (!dc)
+ return IRQ_NONE;
+
+ spin_lock(&dc->spin_mutex);
+ read_iir = readw(dc->reg_iir);
+
+ /* Card removed */
+ if (read_iir == (u16)-1)
+ goto none;
+ /*
+ * Just handle interrupt enabled in IER
+ * (by masking with dc->last_ier)
+ */
+ read_iir &= dc->last_ier;
+
+ if (read_iir == 0)
+ goto none;
+
+
+ DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir,
+ dc->last_ier);
+
+ if (read_iir & RESET) {
+ if (unlikely(!nozomi_read_config_table(dc))) {
+ dc->last_ier = 0x0;
+ writew(dc->last_ier, dc->reg_ier);
+ dev_err(&dc->pdev->dev, "Could not read status from "
+ "card, we should disable interface\n");
+ } else {
+ writew(RESET, dc->reg_fcr);
+ }
+ /* No more useful info if this was the reset interrupt. */
+ goto exit_handler;
+ }
+ if (read_iir & CTRL_UL) {
+ DBG1("CTRL_UL");
+ dc->last_ier &= ~CTRL_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_flow_control(dc)) {
+ writew(CTRL_UL, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | CTRL_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ }
+ }
+ if (read_iir & CTRL_DL) {
+ receive_flow_control(dc);
+ writew(CTRL_DL, dc->reg_fcr);
+ }
+ if (read_iir & MDM_DL) {
+ if (!handle_data_dl(dc, PORT_MDM,
+ &(dc->port[PORT_MDM].toggle_dl), read_iir,
+ MDM_DL1, MDM_DL2)) {
+ dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
+ goto exit_handler;
+ }
+ }
+ if (read_iir & MDM_UL) {
+ if (!handle_data_ul(dc, PORT_MDM, read_iir)) {
+ dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
+ goto exit_handler;
+ }
+ }
+ if (read_iir & DIAG_DL) {
+ if (!handle_data_dl(dc, PORT_DIAG,
+ &(dc->port[PORT_DIAG].toggle_dl), read_iir,
+ DIAG_DL1, DIAG_DL2)) {
+ dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
+ goto exit_handler;
+ }
+ }
+ if (read_iir & DIAG_UL) {
+ dc->last_ier &= ~DIAG_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(PORT_DIAG, dc)) {
+ writew(DIAG_UL, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | DIAG_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ }
+ }
+ if (read_iir & APP1_DL) {
+ if (receive_data(PORT_APP1, dc))
+ writew(APP1_DL, dc->reg_fcr);
+ }
+ if (read_iir & APP1_UL) {
+ dc->last_ier &= ~APP1_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(PORT_APP1, dc)) {
+ writew(APP1_UL, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | APP1_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ }
+ }
+ if (read_iir & APP2_DL) {
+ if (receive_data(PORT_APP2, dc))
+ writew(APP2_DL, dc->reg_fcr);
+ }
+ if (read_iir & APP2_UL) {
+ dc->last_ier &= ~APP2_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ if (send_data(PORT_APP2, dc)) {
+ writew(APP2_UL, dc->reg_fcr);
+ dc->last_ier = dc->last_ier | APP2_UL;
+ writew(dc->last_ier, dc->reg_ier);
+ }
+ }
+
+exit_handler:
+ spin_unlock(&dc->spin_mutex);
+ for (a = 0; a < NOZOMI_MAX_PORTS; a++) {
+ struct tty_struct *tty;
+ if (test_and_clear_bit(a, &dc->flip)) {
+ tty = tty_port_tty_get(&dc->port[a].port);
+ if (tty)
+ tty_flip_buffer_push(tty);
+ tty_kref_put(tty);
+ }
+ }
+ return IRQ_HANDLED;
+none:
+ spin_unlock(&dc->spin_mutex);
+ return IRQ_NONE;
+}
+
+static void nozomi_get_card_type(struct nozomi *dc)
+{
+ int i;
+ u32 size = 0;
+
+ for (i = 0; i < 6; i++)
+ size += pci_resource_len(dc->pdev, i);
+
+ /* Assume card type F32_8 if no match */
+ dc->card_type = size == 2048 ? F32_2 : F32_8;
+
+ dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
+}
+
+static void nozomi_setup_private_data(struct nozomi *dc)
+{
+ void __iomem *offset = dc->base_addr + dc->card_type / 2;
+ unsigned int i;
+
+ dc->reg_fcr = (void __iomem *)(offset + R_FCR);
+ dc->reg_iir = (void __iomem *)(offset + R_IIR);
+ dc->reg_ier = (void __iomem *)(offset + R_IER);
+ dc->last_ier = 0;
+ dc->flip = 0;
+
+ dc->port[PORT_MDM].token_dl = MDM_DL;
+ dc->port[PORT_DIAG].token_dl = DIAG_DL;
+ dc->port[PORT_APP1].token_dl = APP1_DL;
+ dc->port[PORT_APP2].token_dl = APP2_DL;
+
+ for (i = 0; i < MAX_PORT; i++)
+ init_waitqueue_head(&dc->port[i].tty_wait);
+}
+
+static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
+
+ return sprintf(buf, "%d\n", dc->card_type);
+}
+static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL);
+
+static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
+
+ return sprintf(buf, "%u\n", dc->open_ttys);
+}
+static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL);
+
+static void make_sysfs_files(struct nozomi *dc)
+{
+ if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
+ dev_err(&dc->pdev->dev,
+ "Could not create sysfs file for card_type\n");
+ if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
+ dev_err(&dc->pdev->dev,
+ "Could not create sysfs file for open_ttys\n");
+}
+
+static void remove_sysfs_files(struct nozomi *dc)
+{
+ device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
+ device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
+}
+
+/* Allocate memory for one device */
+static int __devinit nozomi_card_init(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ resource_size_t start;
+ int ret;
+ struct nozomi *dc = NULL;
+ int ndev_idx;
+ int i;
+
+ dev_dbg(&pdev->dev, "Init, new card found\n");
+
+ for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++)
+ if (!ndevs[ndev_idx])
+ break;
+
+ if (ndev_idx >= ARRAY_SIZE(ndevs)) {
+ dev_err(&pdev->dev, "no free tty range for this card left\n");
+ ret = -EIO;
+ goto err;
+ }
+
+ dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
+ if (unlikely(!dc)) {
+ dev_err(&pdev->dev, "Could not allocate memory\n");
+ ret = -ENOMEM;
+ goto err_free;
+ }
+
+ dc->pdev = pdev;
+
+ ret = pci_enable_device(dc->pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to enable PCI Device\n");
+ goto err_free;
+ }
+
+ ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
+ if (ret) {
+ dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
+ (int) /* nozomi_private.io_addr */ 0);
+ goto err_disable_device;
+ }
+
+ start = pci_resource_start(dc->pdev, 0);
+ if (start == 0) {
+ dev_err(&pdev->dev, "No I/O address for card detected\n");
+ ret = -ENODEV;
+ goto err_rel_regs;
+ }
+
+ /* Find out what card type it is */
+ nozomi_get_card_type(dc);
+
+ dc->base_addr = ioremap_nocache(start, dc->card_type);
+ if (!dc->base_addr) {
+ dev_err(&pdev->dev, "Unable to map card MMIO\n");
+ ret = -ENODEV;
+ goto err_rel_regs;
+ }
+
+ dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
+ if (!dc->send_buf) {
+ dev_err(&pdev->dev, "Could not allocate send buffer?\n");
+ ret = -ENOMEM;
+ goto err_free_sbuf;
+ }
+
+ for (i = PORT_MDM; i < MAX_PORT; i++) {
+ if (kfifo_alloc(&dc->port[i].fifo_ul,
+ FIFO_BUFFER_SIZE_UL, GFP_ATOMIC)) {
+ dev_err(&pdev->dev,
+ "Could not allocate kfifo buffer\n");
+ ret = -ENOMEM;
+ goto err_free_kfifo;
+ }
+ }
+
+ spin_lock_init(&dc->spin_mutex);
+
+ nozomi_setup_private_data(dc);
+
+ /* Disable all interrupts */
+ dc->last_ier = 0;
+ writew(dc->last_ier, dc->reg_ier);
+
+ ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED,
+ NOZOMI_NAME, dc);
+ if (unlikely(ret)) {
+ dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
+ goto err_free_kfifo;
+ }
+
+ DBG1("base_addr: %p", dc->base_addr);
+
+ make_sysfs_files(dc);
+
+ dc->index_start = ndev_idx * MAX_PORT;
+ ndevs[ndev_idx] = dc;
+
+ pci_set_drvdata(pdev, dc);
+
+ /* Enable RESET interrupt */
+ dc->last_ier = RESET;
+ iowrite16(dc->last_ier, dc->reg_ier);
+
+ dc->state = NOZOMI_STATE_ENABLED;
+
+ for (i = 0; i < MAX_PORT; i++) {
+ struct device *tty_dev;
+ struct port *port = &dc->port[i];
+ port->dc = dc;
+ mutex_init(&port->tty_sem);
+ tty_port_init(&port->port);
+ port->port.ops = &noz_tty_port_ops;
+ tty_dev = tty_register_device(ntty_driver, dc->index_start + i,
+ &pdev->dev);
+
+ if (IS_ERR(tty_dev)) {
+ ret = PTR_ERR(tty_dev);
+ dev_err(&pdev->dev, "Could not allocate tty?\n");
+ goto err_free_tty;
+ }
+ }
+
+ return 0;
+
+err_free_tty:
+ for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
+ tty_unregister_device(ntty_driver, i);
+err_free_kfifo:
+ for (i = 0; i < MAX_PORT; i++)
+ kfifo_free(&dc->port[i].fifo_ul);
+err_free_sbuf:
+ kfree(dc->send_buf);
+ iounmap(dc->base_addr);
+err_rel_regs:
+ pci_release_regions(pdev);
+err_disable_device:
+ pci_disable_device(pdev);
+err_free:
+ kfree(dc);
+err:
+ return ret;
+}
+
+static void __devexit tty_exit(struct nozomi *dc)
+{
+ unsigned int i;
+
+ DBG1(" ");
+
+ flush_scheduled_work();
+
+ for (i = 0; i < MAX_PORT; ++i) {
+ struct tty_struct *tty = tty_port_tty_get(&dc->port[i].port);
+ if (tty && list_empty(&tty->hangup_work.entry))
+ tty_hangup(tty);
+ tty_kref_put(tty);
+ }
+ /* Racy below - surely should wait for scheduled work to be done or
+ complete off a hangup method ? */
+ while (dc->open_ttys)
+ msleep(1);
+ for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
+ tty_unregister_device(ntty_driver, i);
+}
+
+/* Deallocate memory for one device */
+static void __devexit nozomi_card_exit(struct pci_dev *pdev)
+{
+ int i;
+ struct ctrl_ul ctrl;
+ struct nozomi *dc = pci_get_drvdata(pdev);
+
+ /* Disable all interrupts */
+ dc->last_ier = 0;
+ writew(dc->last_ier, dc->reg_ier);
+
+ tty_exit(dc);
+
+ /* Send 0x0001, command card to resend the reset token. */
+ /* This is to get the reset when the module is reloaded. */
+ ctrl.port = 0x00;
+ ctrl.reserved = 0;
+ ctrl.RTS = 0;
+ ctrl.DTR = 1;
+ DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
+
+ /* Setup dc->reg addresses to we can use defines here */
+ write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
+ writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */
+
+ remove_sysfs_files(dc);
+
+ free_irq(pdev->irq, dc);
+
+ for (i = 0; i < MAX_PORT; i++)
+ kfifo_free(&dc->port[i].fifo_ul);
+
+ kfree(dc->send_buf);
+
+ iounmap(dc->base_addr);
+
+ pci_release_regions(pdev);
+
+ pci_disable_device(pdev);
+
+ ndevs[dc->index_start / MAX_PORT] = NULL;
+
+ kfree(dc);
+}
+
+static void set_rts(const struct tty_struct *tty, int rts)
+{
+ struct port *port = get_port_by_tty(tty);
+
+ port->ctrl_ul.RTS = rts;
+ port->update_flow_control = 1;
+ enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
+}
+
+static void set_dtr(const struct tty_struct *tty, int dtr)
+{
+ struct port *port = get_port_by_tty(tty);
+
+ DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr);
+
+ port->ctrl_ul.DTR = dtr;
+ port->update_flow_control = 1;
+ enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
+}
+
+/*
+ * ----------------------------------------------------------------------------
+ * TTY code
+ * ----------------------------------------------------------------------------
+ */
+
+static int ntty_install(struct tty_driver *driver, struct tty_struct *tty)
+{
+ struct port *port = get_port_by_tty(tty);
+ struct nozomi *dc = get_dc_by_tty(tty);
+ int ret;
+ if (!port || !dc || dc->state != NOZOMI_STATE_READY)
+ return -ENODEV;
+ ret = tty_init_termios(tty);
+ if (ret == 0) {
+ tty_driver_kref_get(driver);
+ tty->count++;
+ tty->driver_data = port;
+ driver->ttys[tty->index] = tty;
+ }
+ return ret;
+}
+
+static void ntty_cleanup(struct tty_struct *tty)
+{
+ tty->driver_data = NULL;
+}
+
+static int ntty_activate(struct tty_port *tport, struct tty_struct *tty)
+{
+ struct port *port = container_of(tport, struct port, port);
+ struct nozomi *dc = port->dc;
+ unsigned long flags;
+
+ DBG1("open: %d", port->token_dl);
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ dc->last_ier = dc->last_ier | port->token_dl;
+ writew(dc->last_ier, dc->reg_ier);
+ dc->open_ttys++;
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+ printk("noz: activated %d: %p\n", tty->index, tport);
+ return 0;
+}
+
+static int ntty_open(struct tty_struct *tty, struct file *filp)
+{
+ struct port *port = tty->driver_data;
+ return tty_port_open(&port->port, tty, filp);
+}
+
+static void ntty_shutdown(struct tty_port *tport)
+{
+ struct port *port = container_of(tport, struct port, port);
+ struct nozomi *dc = port->dc;
+ unsigned long flags;
+
+ DBG1("close: %d", port->token_dl);
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ dc->last_ier &= ~(port->token_dl);
+ writew(dc->last_ier, dc->reg_ier);
+ dc->open_ttys--;
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+ printk("noz: shutdown %p\n", tport);
+}
+
+static void ntty_close(struct tty_struct *tty, struct file *filp)
+{
+ struct port *port = tty->driver_data;
+ if (port)
+ tty_port_close(&port->port, tty, filp);
+}
+
+static void ntty_hangup(struct tty_struct *tty)
+{
+ struct port *port = tty->driver_data;
+ tty_port_hangup(&port->port);
+}
+
+/*
+ * called when the userspace process writes to the tty (/dev/noz*).
+ * Data is inserted into a fifo, which is then read and transfered to the modem.
+ */
+static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
+ int count)
+{
+ int rval = -EINVAL;
+ struct nozomi *dc = get_dc_by_tty(tty);
+ struct port *port = tty->driver_data;
+ unsigned long flags;
+
+ /* DBG1( "WRITEx: %d, index = %d", count, index); */
+
+ if (!dc || !port)
+ return -ENODEV;
+
+ mutex_lock(&port->tty_sem);
+
+ if (unlikely(!port->port.count)) {
+ DBG1(" ");
+ goto exit;
+ }
+
+ rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count);
+
+ /* notify card */
+ if (unlikely(dc == NULL)) {
+ DBG1("No device context?");
+ goto exit;
+ }
+
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ /* CTS is only valid on the modem channel */
+ if (port == &(dc->port[PORT_MDM])) {
+ if (port->ctrl_dl.CTS) {
+ DBG4("Enable interrupt");
+ enable_transmit_ul(tty->index % MAX_PORT, dc);
+ } else {
+ dev_err(&dc->pdev->dev,
+ "CTS not active on modem port?\n");
+ }
+ } else {
+ enable_transmit_ul(tty->index % MAX_PORT, dc);
+ }
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+
+exit:
+ mutex_unlock(&port->tty_sem);
+ return rval;
+}
+
+/*
+ * Calculate how much is left in device
+ * This method is called by the upper tty layer.
+ * #according to sources N_TTY.c it expects a value >= 0 and
+ * does not check for negative values.
+ *
+ * If the port is unplugged report lots of room and let the bits
+ * dribble away so we don't block anything.
+ */
+static int ntty_write_room(struct tty_struct *tty)
+{
+ struct port *port = tty->driver_data;
+ int room = 4096;
+ const struct nozomi *dc = get_dc_by_tty(tty);
+
+ if (dc) {
+ mutex_lock(&port->tty_sem);
+ if (port->port.count)
+ room = kfifo_avail(&port->fifo_ul);
+ mutex_unlock(&port->tty_sem);
+ }
+ return room;
+}
+
+/* Gets io control parameters */
+static int ntty_tiocmget(struct tty_struct *tty)
+{
+ const struct port *port = tty->driver_data;
+ const struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
+ const struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
+
+ /* Note: these could change under us but it is not clear this
+ matters if so */
+ return (ctrl_ul->RTS ? TIOCM_RTS : 0) |
+ (ctrl_ul->DTR ? TIOCM_DTR : 0) |
+ (ctrl_dl->DCD ? TIOCM_CAR : 0) |
+ (ctrl_dl->RI ? TIOCM_RNG : 0) |
+ (ctrl_dl->DSR ? TIOCM_DSR : 0) |
+ (ctrl_dl->CTS ? TIOCM_CTS : 0);
+}
+
+/* Sets io controls parameters */
+static int ntty_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct nozomi *dc = get_dc_by_tty(tty);
+ unsigned long flags;
+
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ if (set & TIOCM_RTS)
+ set_rts(tty, 1);
+ else if (clear & TIOCM_RTS)
+ set_rts(tty, 0);
+
+ if (set & TIOCM_DTR)
+ set_dtr(tty, 1);
+ else if (clear & TIOCM_DTR)
+ set_dtr(tty, 0);
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+
+ return 0;
+}
+
+static int ntty_cflags_changed(struct port *port, unsigned long flags,
+ struct async_icount *cprev)
+{
+ const struct async_icount cnow = port->tty_icount;
+ int ret;
+
+ ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
+ ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
+ ((flags & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
+ ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts));
+
+ *cprev = cnow;
+
+ return ret;
+}
+
+static int ntty_tiocgicount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ struct port *port = tty->driver_data;
+ const struct async_icount cnow = port->tty_icount;
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+ return 0;
+}
+
+static int ntty_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct port *port = tty->driver_data;
+ int rval = -ENOIOCTLCMD;
+
+ DBG1("******** IOCTL, cmd: %d", cmd);
+
+ switch (cmd) {
+ case TIOCMIWAIT: {
+ struct async_icount cprev = port->tty_icount;
+
+ rval = wait_event_interruptible(port->tty_wait,
+ ntty_cflags_changed(port, arg, &cprev));
+ break;
+ }
+ default:
+ DBG1("ERR: 0x%08X, %d", cmd, cmd);
+ break;
+ };
+
+ return rval;
+}
+
+/*
+ * Called by the upper tty layer when tty buffers are ready
+ * to receive data again after a call to throttle.
+ */
+static void ntty_unthrottle(struct tty_struct *tty)
+{
+ struct nozomi *dc = get_dc_by_tty(tty);
+ unsigned long flags;
+
+ DBG1("UNTHROTTLE");
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ enable_transmit_dl(tty->index % MAX_PORT, dc);
+ set_rts(tty, 1);
+
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+}
+
+/*
+ * Called by the upper tty layer when the tty buffers are almost full.
+ * The driver should stop send more data.
+ */
+static void ntty_throttle(struct tty_struct *tty)
+{
+ struct nozomi *dc = get_dc_by_tty(tty);
+ unsigned long flags;
+
+ DBG1("THROTTLE");
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ set_rts(tty, 0);
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+}
+
+/* Returns number of chars in buffer, called by tty layer */
+static s32 ntty_chars_in_buffer(struct tty_struct *tty)
+{
+ struct port *port = tty->driver_data;
+ struct nozomi *dc = get_dc_by_tty(tty);
+ s32 rval = 0;
+
+ if (unlikely(!dc || !port)) {
+ goto exit_in_buffer;
+ }
+
+ if (unlikely(!port->port.count)) {
+ dev_err(&dc->pdev->dev, "No tty open?\n");
+ goto exit_in_buffer;
+ }
+
+ rval = kfifo_len(&port->fifo_ul);
+
+exit_in_buffer:
+ return rval;
+}
+
+static const struct tty_port_operations noz_tty_port_ops = {
+ .activate = ntty_activate,
+ .shutdown = ntty_shutdown,
+};
+
+static const struct tty_operations tty_ops = {
+ .ioctl = ntty_ioctl,
+ .open = ntty_open,
+ .close = ntty_close,
+ .hangup = ntty_hangup,
+ .write = ntty_write,
+ .write_room = ntty_write_room,
+ .unthrottle = ntty_unthrottle,
+ .throttle = ntty_throttle,
+ .chars_in_buffer = ntty_chars_in_buffer,
+ .tiocmget = ntty_tiocmget,
+ .tiocmset = ntty_tiocmset,
+ .get_icount = ntty_tiocgicount,
+ .install = ntty_install,
+ .cleanup = ntty_cleanup,
+};
+
+/* Module initialization */
+static struct pci_driver nozomi_driver = {
+ .name = NOZOMI_NAME,
+ .id_table = nozomi_pci_tbl,
+ .probe = nozomi_card_init,
+ .remove = __devexit_p(nozomi_card_exit),
+};
+
+static __init int nozomi_init(void)
+{
+ int ret;
+
+ printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
+
+ ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
+ if (!ntty_driver)
+ return -ENOMEM;
+
+ ntty_driver->owner = THIS_MODULE;
+ ntty_driver->driver_name = NOZOMI_NAME_TTY;
+ ntty_driver->name = "noz";
+ ntty_driver->major = 0;
+ ntty_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ ntty_driver->subtype = SERIAL_TYPE_NORMAL;
+ ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+ ntty_driver->init_termios = tty_std_termios;
+ ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \
+ HUPCL | CLOCAL;
+ ntty_driver->init_termios.c_ispeed = 115200;
+ ntty_driver->init_termios.c_ospeed = 115200;
+ tty_set_operations(ntty_driver, &tty_ops);
+
+ ret = tty_register_driver(ntty_driver);
+ if (ret) {
+ printk(KERN_ERR "Nozomi: failed to register ntty driver\n");
+ goto free_tty;
+ }
+
+ ret = pci_register_driver(&nozomi_driver);
+ if (ret) {
+ printk(KERN_ERR "Nozomi: can't register pci driver\n");
+ goto unr_tty;
+ }
+
+ return 0;
+unr_tty:
+ tty_unregister_driver(ntty_driver);
+free_tty:
+ put_tty_driver(ntty_driver);
+ return ret;
+}
+
+static __exit void nozomi_exit(void)
+{
+ printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
+ pci_unregister_driver(&nozomi_driver);
+ tty_unregister_driver(ntty_driver);
+ put_tty_driver(ntty_driver);
+}
+
+module_init(nozomi_init);
+module_exit(nozomi_exit);
+
+module_param(debug, int, S_IRUGO | S_IWUSR);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);
--- /dev/null
+/*
+ * RocketPort device driver for Linux
+ *
+ * Written by Theodore Ts'o, 1995, 1996, 1997, 1998, 1999, 2000.
+ *
+ * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2003 by Comtrol, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * Kernel Synchronization:
+ *
+ * This driver has 2 kernel control paths - exception handlers (calls into the driver
+ * from user mode) and the timer bottom half (tasklet). This is a polled driver, interrupts
+ * are not used.
+ *
+ * Critical data:
+ * - rp_table[], accessed through passed "info" pointers, is a global (static) array of
+ * serial port state information and the xmit_buf circular buffer. Protected by
+ * a per port spinlock.
+ * - xmit_flags[], an array of ints indexed by line (port) number, indicating that there
+ * is data to be transmitted. Protected by atomic bit operations.
+ * - rp_num_ports, int indicating number of open ports, protected by atomic operations.
+ *
+ * rp_write() and rp_write_char() functions use a per port semaphore to protect against
+ * simultaneous access to the same port by more than one process.
+ */
+
+/****** Defines ******/
+#define ROCKET_PARANOIA_CHECK
+#define ROCKET_DISABLE_SIMUSAGE
+
+#undef ROCKET_SOFT_FLOW
+#undef ROCKET_DEBUG_OPEN
+#undef ROCKET_DEBUG_INTR
+#undef ROCKET_DEBUG_WRITE
+#undef ROCKET_DEBUG_FLOW
+#undef ROCKET_DEBUG_THROTTLE
+#undef ROCKET_DEBUG_WAIT_UNTIL_SENT
+#undef ROCKET_DEBUG_RECEIVE
+#undef ROCKET_DEBUG_HANGUP
+#undef REV_PCI_ORDER
+#undef ROCKET_DEBUG_IO
+
+#define POLL_PERIOD HZ/100 /* Polling period .01 seconds (10ms) */
+
+/****** Kernel includes ******/
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/major.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/mutex.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/completion.h>
+#include <linux/wait.h>
+#include <linux/pci.h>
+#include <linux/uaccess.h>
+#include <asm/atomic.h>
+#include <asm/unaligned.h>
+#include <linux/bitops.h>
+#include <linux/spinlock.h>
+#include <linux/init.h>
+
+/****** RocketPort includes ******/
+
+#include "rocket_int.h"
+#include "rocket.h"
+
+#define ROCKET_VERSION "2.09"
+#define ROCKET_DATE "12-June-2003"
+
+/****** RocketPort Local Variables ******/
+
+static void rp_do_poll(unsigned long dummy);
+
+static struct tty_driver *rocket_driver;
+
+static struct rocket_version driver_version = {
+ ROCKET_VERSION, ROCKET_DATE
+};
+
+static struct r_port *rp_table[MAX_RP_PORTS]; /* The main repository of serial port state information. */
+static unsigned int xmit_flags[NUM_BOARDS]; /* Bit significant, indicates port had data to transmit. */
+ /* eg. Bit 0 indicates port 0 has xmit data, ... */
+static atomic_t rp_num_ports_open; /* Number of serial ports open */
+static DEFINE_TIMER(rocket_timer, rp_do_poll, 0, 0);
+
+static unsigned long board1; /* ISA addresses, retrieved from rocketport.conf */
+static unsigned long board2;
+static unsigned long board3;
+static unsigned long board4;
+static unsigned long controller;
+static int support_low_speed;
+static unsigned long modem1;
+static unsigned long modem2;
+static unsigned long modem3;
+static unsigned long modem4;
+static unsigned long pc104_1[8];
+static unsigned long pc104_2[8];
+static unsigned long pc104_3[8];
+static unsigned long pc104_4[8];
+static unsigned long *pc104[4] = { pc104_1, pc104_2, pc104_3, pc104_4 };
+
+static int rp_baud_base[NUM_BOARDS]; /* Board config info (Someday make a per-board structure) */
+static unsigned long rcktpt_io_addr[NUM_BOARDS];
+static int rcktpt_type[NUM_BOARDS];
+static int is_PCI[NUM_BOARDS];
+static rocketModel_t rocketModel[NUM_BOARDS];
+static int max_board;
+static const struct tty_port_operations rocket_port_ops;
+
+/*
+ * The following arrays define the interrupt bits corresponding to each AIOP.
+ * These bits are different between the ISA and regular PCI boards and the
+ * Universal PCI boards.
+ */
+
+static Word_t aiop_intr_bits[AIOP_CTL_SIZE] = {
+ AIOP_INTR_BIT_0,
+ AIOP_INTR_BIT_1,
+ AIOP_INTR_BIT_2,
+ AIOP_INTR_BIT_3
+};
+
+static Word_t upci_aiop_intr_bits[AIOP_CTL_SIZE] = {
+ UPCI_AIOP_INTR_BIT_0,
+ UPCI_AIOP_INTR_BIT_1,
+ UPCI_AIOP_INTR_BIT_2,
+ UPCI_AIOP_INTR_BIT_3
+};
+
+static Byte_t RData[RDATASIZE] = {
+ 0x00, 0x09, 0xf6, 0x82,
+ 0x02, 0x09, 0x86, 0xfb,
+ 0x04, 0x09, 0x00, 0x0a,
+ 0x06, 0x09, 0x01, 0x0a,
+ 0x08, 0x09, 0x8a, 0x13,
+ 0x0a, 0x09, 0xc5, 0x11,
+ 0x0c, 0x09, 0x86, 0x85,
+ 0x0e, 0x09, 0x20, 0x0a,
+ 0x10, 0x09, 0x21, 0x0a,
+ 0x12, 0x09, 0x41, 0xff,
+ 0x14, 0x09, 0x82, 0x00,
+ 0x16, 0x09, 0x82, 0x7b,
+ 0x18, 0x09, 0x8a, 0x7d,
+ 0x1a, 0x09, 0x88, 0x81,
+ 0x1c, 0x09, 0x86, 0x7a,
+ 0x1e, 0x09, 0x84, 0x81,
+ 0x20, 0x09, 0x82, 0x7c,
+ 0x22, 0x09, 0x0a, 0x0a
+};
+
+static Byte_t RRegData[RREGDATASIZE] = {
+ 0x00, 0x09, 0xf6, 0x82, /* 00: Stop Rx processor */
+ 0x08, 0x09, 0x8a, 0x13, /* 04: Tx software flow control */
+ 0x0a, 0x09, 0xc5, 0x11, /* 08: XON char */
+ 0x0c, 0x09, 0x86, 0x85, /* 0c: XANY */
+ 0x12, 0x09, 0x41, 0xff, /* 10: Rx mask char */
+ 0x14, 0x09, 0x82, 0x00, /* 14: Compare/Ignore #0 */
+ 0x16, 0x09, 0x82, 0x7b, /* 18: Compare #1 */
+ 0x18, 0x09, 0x8a, 0x7d, /* 1c: Compare #2 */
+ 0x1a, 0x09, 0x88, 0x81, /* 20: Interrupt #1 */
+ 0x1c, 0x09, 0x86, 0x7a, /* 24: Ignore/Replace #1 */
+ 0x1e, 0x09, 0x84, 0x81, /* 28: Interrupt #2 */
+ 0x20, 0x09, 0x82, 0x7c, /* 2c: Ignore/Replace #2 */
+ 0x22, 0x09, 0x0a, 0x0a /* 30: Rx FIFO Enable */
+};
+
+static CONTROLLER_T sController[CTL_SIZE] = {
+ {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0},
+ {0, 0, 0, 0}, {-1, -1, -1, -1}, {0, 0, 0, 0}},
+ {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0},
+ {0, 0, 0, 0}, {-1, -1, -1, -1}, {0, 0, 0, 0}},
+ {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0},
+ {0, 0, 0, 0}, {-1, -1, -1, -1}, {0, 0, 0, 0}},
+ {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0},
+ {0, 0, 0, 0}, {-1, -1, -1, -1}, {0, 0, 0, 0}}
+};
+
+static Byte_t sBitMapClrTbl[8] = {
+ 0xfe, 0xfd, 0xfb, 0xf7, 0xef, 0xdf, 0xbf, 0x7f
+};
+
+static Byte_t sBitMapSetTbl[8] = {
+ 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80
+};
+
+static int sClockPrescale = 0x14;
+
+/*
+ * Line number is the ttySIx number (x), the Minor number. We
+ * assign them sequentially, starting at zero. The following
+ * array keeps track of the line number assigned to a given board/aiop/channel.
+ */
+static unsigned char lineNumbers[MAX_RP_PORTS];
+static unsigned long nextLineNumber;
+
+/***** RocketPort Static Prototypes *********/
+static int __init init_ISA(int i);
+static void rp_wait_until_sent(struct tty_struct *tty, int timeout);
+static void rp_flush_buffer(struct tty_struct *tty);
+static void rmSpeakerReset(CONTROLLER_T * CtlP, unsigned long model);
+static unsigned char GetLineNumber(int ctrl, int aiop, int ch);
+static unsigned char SetLineNumber(int ctrl, int aiop, int ch);
+static void rp_start(struct tty_struct *tty);
+static int sInitChan(CONTROLLER_T * CtlP, CHANNEL_T * ChP, int AiopNum,
+ int ChanNum);
+static void sSetInterfaceMode(CHANNEL_T * ChP, Byte_t mode);
+static void sFlushRxFIFO(CHANNEL_T * ChP);
+static void sFlushTxFIFO(CHANNEL_T * ChP);
+static void sEnInterrupts(CHANNEL_T * ChP, Word_t Flags);
+static void sDisInterrupts(CHANNEL_T * ChP, Word_t Flags);
+static void sModemReset(CONTROLLER_T * CtlP, int chan, int on);
+static void sPCIModemReset(CONTROLLER_T * CtlP, int chan, int on);
+static int sWriteTxPrioByte(CHANNEL_T * ChP, Byte_t Data);
+static int sPCIInitController(CONTROLLER_T * CtlP, int CtlNum,
+ ByteIO_t * AiopIOList, int AiopIOListSize,
+ WordIO_t ConfigIO, int IRQNum, Byte_t Frequency,
+ int PeriodicOnly, int altChanRingIndicator,
+ int UPCIRingInd);
+static int sInitController(CONTROLLER_T * CtlP, int CtlNum, ByteIO_t MudbacIO,
+ ByteIO_t * AiopIOList, int AiopIOListSize,
+ int IRQNum, Byte_t Frequency, int PeriodicOnly);
+static int sReadAiopID(ByteIO_t io);
+static int sReadAiopNumChan(WordIO_t io);
+
+MODULE_AUTHOR("Theodore Ts'o");
+MODULE_DESCRIPTION("Comtrol RocketPort driver");
+module_param(board1, ulong, 0);
+MODULE_PARM_DESC(board1, "I/O port for (ISA) board #1");
+module_param(board2, ulong, 0);
+MODULE_PARM_DESC(board2, "I/O port for (ISA) board #2");
+module_param(board3, ulong, 0);
+MODULE_PARM_DESC(board3, "I/O port for (ISA) board #3");
+module_param(board4, ulong, 0);
+MODULE_PARM_DESC(board4, "I/O port for (ISA) board #4");
+module_param(controller, ulong, 0);
+MODULE_PARM_DESC(controller, "I/O port for (ISA) rocketport controller");
+module_param(support_low_speed, bool, 0);
+MODULE_PARM_DESC(support_low_speed, "1 means support 50 baud, 0 means support 460400 baud");
+module_param(modem1, ulong, 0);
+MODULE_PARM_DESC(modem1, "1 means (ISA) board #1 is a RocketModem");
+module_param(modem2, ulong, 0);
+MODULE_PARM_DESC(modem2, "1 means (ISA) board #2 is a RocketModem");
+module_param(modem3, ulong, 0);
+MODULE_PARM_DESC(modem3, "1 means (ISA) board #3 is a RocketModem");
+module_param(modem4, ulong, 0);
+MODULE_PARM_DESC(modem4, "1 means (ISA) board #4 is a RocketModem");
+module_param_array(pc104_1, ulong, NULL, 0);
+MODULE_PARM_DESC(pc104_1, "set interface types for ISA(PC104) board #1 (e.g. pc104_1=232,232,485,485,...");
+module_param_array(pc104_2, ulong, NULL, 0);
+MODULE_PARM_DESC(pc104_2, "set interface types for ISA(PC104) board #2 (e.g. pc104_2=232,232,485,485,...");
+module_param_array(pc104_3, ulong, NULL, 0);
+MODULE_PARM_DESC(pc104_3, "set interface types for ISA(PC104) board #3 (e.g. pc104_3=232,232,485,485,...");
+module_param_array(pc104_4, ulong, NULL, 0);
+MODULE_PARM_DESC(pc104_4, "set interface types for ISA(PC104) board #4 (e.g. pc104_4=232,232,485,485,...");
+
+static int rp_init(void);
+static void rp_cleanup_module(void);
+
+module_init(rp_init);
+module_exit(rp_cleanup_module);
+
+
+MODULE_LICENSE("Dual BSD/GPL");
+
+/*************************************************************************/
+/* Module code starts here */
+
+static inline int rocket_paranoia_check(struct r_port *info,
+ const char *routine)
+{
+#ifdef ROCKET_PARANOIA_CHECK
+ if (!info)
+ return 1;
+ if (info->magic != RPORT_MAGIC) {
+ printk(KERN_WARNING "Warning: bad magic number for rocketport "
+ "struct in %s\n", routine);
+ return 1;
+ }
+#endif
+ return 0;
+}
+
+
+/* Serial port receive data function. Called (from timer poll) when an AIOPIC signals
+ * that receive data is present on a serial port. Pulls data from FIFO, moves it into the
+ * tty layer.
+ */
+static void rp_do_receive(struct r_port *info,
+ struct tty_struct *tty,
+ CHANNEL_t * cp, unsigned int ChanStatus)
+{
+ unsigned int CharNStat;
+ int ToRecv, wRecv, space;
+ unsigned char *cbuf;
+
+ ToRecv = sGetRxCnt(cp);
+#ifdef ROCKET_DEBUG_INTR
+ printk(KERN_INFO "rp_do_receive(%d)...\n", ToRecv);
+#endif
+ if (ToRecv == 0)
+ return;
+
+ /*
+ * if status indicates there are errored characters in the
+ * FIFO, then enter status mode (a word in FIFO holds
+ * character and status).
+ */
+ if (ChanStatus & (RXFOVERFL | RXBREAK | RXFRAME | RXPARITY)) {
+ if (!(ChanStatus & STATMODE)) {
+#ifdef ROCKET_DEBUG_RECEIVE
+ printk(KERN_INFO "Entering STATMODE...\n");
+#endif
+ ChanStatus |= STATMODE;
+ sEnRxStatusMode(cp);
+ }
+ }
+
+ /*
+ * if we previously entered status mode, then read down the
+ * FIFO one word at a time, pulling apart the character and
+ * the status. Update error counters depending on status
+ */
+ if (ChanStatus & STATMODE) {
+#ifdef ROCKET_DEBUG_RECEIVE
+ printk(KERN_INFO "Ignore %x, read %x...\n",
+ info->ignore_status_mask, info->read_status_mask);
+#endif
+ while (ToRecv) {
+ char flag;
+
+ CharNStat = sInW(sGetTxRxDataIO(cp));
+#ifdef ROCKET_DEBUG_RECEIVE
+ printk(KERN_INFO "%x...\n", CharNStat);
+#endif
+ if (CharNStat & STMBREAKH)
+ CharNStat &= ~(STMFRAMEH | STMPARITYH);
+ if (CharNStat & info->ignore_status_mask) {
+ ToRecv--;
+ continue;
+ }
+ CharNStat &= info->read_status_mask;
+ if (CharNStat & STMBREAKH)
+ flag = TTY_BREAK;
+ else if (CharNStat & STMPARITYH)
+ flag = TTY_PARITY;
+ else if (CharNStat & STMFRAMEH)
+ flag = TTY_FRAME;
+ else if (CharNStat & STMRCVROVRH)
+ flag = TTY_OVERRUN;
+ else
+ flag = TTY_NORMAL;
+ tty_insert_flip_char(tty, CharNStat & 0xff, flag);
+ ToRecv--;
+ }
+
+ /*
+ * after we've emptied the FIFO in status mode, turn
+ * status mode back off
+ */
+ if (sGetRxCnt(cp) == 0) {
+#ifdef ROCKET_DEBUG_RECEIVE
+ printk(KERN_INFO "Status mode off.\n");
+#endif
+ sDisRxStatusMode(cp);
+ }
+ } else {
+ /*
+ * we aren't in status mode, so read down the FIFO two
+ * characters at time by doing repeated word IO
+ * transfer.
+ */
+ space = tty_prepare_flip_string(tty, &cbuf, ToRecv);
+ if (space < ToRecv) {
+#ifdef ROCKET_DEBUG_RECEIVE
+ printk(KERN_INFO "rp_do_receive:insufficient space ToRecv=%d space=%d\n", ToRecv, space);
+#endif
+ if (space <= 0)
+ return;
+ ToRecv = space;
+ }
+ wRecv = ToRecv >> 1;
+ if (wRecv)
+ sInStrW(sGetTxRxDataIO(cp), (unsigned short *) cbuf, wRecv);
+ if (ToRecv & 1)
+ cbuf[ToRecv - 1] = sInB(sGetTxRxDataIO(cp));
+ }
+ /* Push the data up to the tty layer */
+ tty_flip_buffer_push(tty);
+}
+
+/*
+ * Serial port transmit data function. Called from the timer polling loop as a
+ * result of a bit set in xmit_flags[], indicating data (from the tty layer) is ready
+ * to be sent out the serial port. Data is buffered in rp_table[line].xmit_buf, it is
+ * moved to the port's xmit FIFO. *info is critical data, protected by spinlocks.
+ */
+static void rp_do_transmit(struct r_port *info)
+{
+ int c;
+ CHANNEL_t *cp = &info->channel;
+ struct tty_struct *tty;
+ unsigned long flags;
+
+#ifdef ROCKET_DEBUG_INTR
+ printk(KERN_DEBUG "%s\n", __func__);
+#endif
+ if (!info)
+ return;
+ tty = tty_port_tty_get(&info->port);
+
+ if (tty == NULL) {
+ printk(KERN_WARNING "rp: WARNING %s called with tty==NULL\n", __func__);
+ clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
+ return;
+ }
+
+ spin_lock_irqsave(&info->slock, flags);
+ info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
+
+ /* Loop sending data to FIFO until done or FIFO full */
+ while (1) {
+ if (tty->stopped || tty->hw_stopped)
+ break;
+ c = min(info->xmit_fifo_room, info->xmit_cnt);
+ c = min(c, XMIT_BUF_SIZE - info->xmit_tail);
+ if (c <= 0 || info->xmit_fifo_room <= 0)
+ break;
+ sOutStrW(sGetTxRxDataIO(cp), (unsigned short *) (info->xmit_buf + info->xmit_tail), c / 2);
+ if (c & 1)
+ sOutB(sGetTxRxDataIO(cp), info->xmit_buf[info->xmit_tail + c - 1]);
+ info->xmit_tail += c;
+ info->xmit_tail &= XMIT_BUF_SIZE - 1;
+ info->xmit_cnt -= c;
+ info->xmit_fifo_room -= c;
+#ifdef ROCKET_DEBUG_INTR
+ printk(KERN_INFO "tx %d chars...\n", c);
+#endif
+ }
+
+ if (info->xmit_cnt == 0)
+ clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
+
+ if (info->xmit_cnt < WAKEUP_CHARS) {
+ tty_wakeup(tty);
+#ifdef ROCKETPORT_HAVE_POLL_WAIT
+ wake_up_interruptible(&tty->poll_wait);
+#endif
+ }
+
+ spin_unlock_irqrestore(&info->slock, flags);
+ tty_kref_put(tty);
+
+#ifdef ROCKET_DEBUG_INTR
+ printk(KERN_DEBUG "(%d,%d,%d,%d)...\n", info->xmit_cnt, info->xmit_head,
+ info->xmit_tail, info->xmit_fifo_room);
+#endif
+}
+
+/*
+ * Called when a serial port signals it has read data in it's RX FIFO.
+ * It checks what interrupts are pending and services them, including
+ * receiving serial data.
+ */
+static void rp_handle_port(struct r_port *info)
+{
+ CHANNEL_t *cp;
+ struct tty_struct *tty;
+ unsigned int IntMask, ChanStatus;
+
+ if (!info)
+ return;
+
+ if ((info->port.flags & ASYNC_INITIALIZED) == 0) {
+ printk(KERN_WARNING "rp: WARNING: rp_handle_port called with "
+ "info->flags & NOT_INIT\n");
+ return;
+ }
+ tty = tty_port_tty_get(&info->port);
+ if (!tty) {
+ printk(KERN_WARNING "rp: WARNING: rp_handle_port called with "
+ "tty==NULL\n");
+ return;
+ }
+ cp = &info->channel;
+
+ IntMask = sGetChanIntID(cp) & info->intmask;
+#ifdef ROCKET_DEBUG_INTR
+ printk(KERN_INFO "rp_interrupt %02x...\n", IntMask);
+#endif
+ ChanStatus = sGetChanStatus(cp);
+ if (IntMask & RXF_TRIG) { /* Rx FIFO trigger level */
+ rp_do_receive(info, tty, cp, ChanStatus);
+ }
+ if (IntMask & DELTA_CD) { /* CD change */
+#if (defined(ROCKET_DEBUG_OPEN) || defined(ROCKET_DEBUG_INTR) || defined(ROCKET_DEBUG_HANGUP))
+ printk(KERN_INFO "ttyR%d CD now %s...\n", info->line,
+ (ChanStatus & CD_ACT) ? "on" : "off");
+#endif
+ if (!(ChanStatus & CD_ACT) && info->cd_status) {
+#ifdef ROCKET_DEBUG_HANGUP
+ printk(KERN_INFO "CD drop, calling hangup.\n");
+#endif
+ tty_hangup(tty);
+ }
+ info->cd_status = (ChanStatus & CD_ACT) ? 1 : 0;
+ wake_up_interruptible(&info->port.open_wait);
+ }
+#ifdef ROCKET_DEBUG_INTR
+ if (IntMask & DELTA_CTS) { /* CTS change */
+ printk(KERN_INFO "CTS change...\n");
+ }
+ if (IntMask & DELTA_DSR) { /* DSR change */
+ printk(KERN_INFO "DSR change...\n");
+ }
+#endif
+ tty_kref_put(tty);
+}
+
+/*
+ * The top level polling routine. Repeats every 1/100 HZ (10ms).
+ */
+static void rp_do_poll(unsigned long dummy)
+{
+ CONTROLLER_t *ctlp;
+ int ctrl, aiop, ch, line;
+ unsigned int xmitmask, i;
+ unsigned int CtlMask;
+ unsigned char AiopMask;
+ Word_t bit;
+
+ /* Walk through all the boards (ctrl's) */
+ for (ctrl = 0; ctrl < max_board; ctrl++) {
+ if (rcktpt_io_addr[ctrl] <= 0)
+ continue;
+
+ /* Get a ptr to the board's control struct */
+ ctlp = sCtlNumToCtlPtr(ctrl);
+
+ /* Get the interrupt status from the board */
+#ifdef CONFIG_PCI
+ if (ctlp->BusType == isPCI)
+ CtlMask = sPCIGetControllerIntStatus(ctlp);
+ else
+#endif
+ CtlMask = sGetControllerIntStatus(ctlp);
+
+ /* Check if any AIOP read bits are set */
+ for (aiop = 0; CtlMask; aiop++) {
+ bit = ctlp->AiopIntrBits[aiop];
+ if (CtlMask & bit) {
+ CtlMask &= ~bit;
+ AiopMask = sGetAiopIntStatus(ctlp, aiop);
+
+ /* Check if any port read bits are set */
+ for (ch = 0; AiopMask; AiopMask >>= 1, ch++) {
+ if (AiopMask & 1) {
+
+ /* Get the line number (/dev/ttyRx number). */
+ /* Read the data from the port. */
+ line = GetLineNumber(ctrl, aiop, ch);
+ rp_handle_port(rp_table[line]);
+ }
+ }
+ }
+ }
+
+ xmitmask = xmit_flags[ctrl];
+
+ /*
+ * xmit_flags contains bit-significant flags, indicating there is data
+ * to xmit on the port. Bit 0 is port 0 on this board, bit 1 is port
+ * 1, ... (32 total possible). The variable i has the aiop and ch
+ * numbers encoded in it (port 0-7 are aiop0, 8-15 are aiop1, etc).
+ */
+ if (xmitmask) {
+ for (i = 0; i < rocketModel[ctrl].numPorts; i++) {
+ if (xmitmask & (1 << i)) {
+ aiop = (i & 0x18) >> 3;
+ ch = i & 0x07;
+ line = GetLineNumber(ctrl, aiop, ch);
+ rp_do_transmit(rp_table[line]);
+ }
+ }
+ }
+ }
+
+ /*
+ * Reset the timer so we get called at the next clock tick (10ms).
+ */
+ if (atomic_read(&rp_num_ports_open))
+ mod_timer(&rocket_timer, jiffies + POLL_PERIOD);
+}
+
+/*
+ * Initializes the r_port structure for a port, as well as enabling the port on
+ * the board.
+ * Inputs: board, aiop, chan numbers
+ */
+static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev)
+{
+ unsigned rocketMode;
+ struct r_port *info;
+ int line;
+ CONTROLLER_T *ctlp;
+
+ /* Get the next available line number */
+ line = SetLineNumber(board, aiop, chan);
+
+ ctlp = sCtlNumToCtlPtr(board);
+
+ /* Get a r_port struct for the port, fill it in and save it globally, indexed by line number */
+ info = kzalloc(sizeof (struct r_port), GFP_KERNEL);
+ if (!info) {
+ printk(KERN_ERR "Couldn't allocate info struct for line #%d\n",
+ line);
+ return;
+ }
+
+ info->magic = RPORT_MAGIC;
+ info->line = line;
+ info->ctlp = ctlp;
+ info->board = board;
+ info->aiop = aiop;
+ info->chan = chan;
+ tty_port_init(&info->port);
+ info->port.ops = &rocket_port_ops;
+ init_completion(&info->close_wait);
+ info->flags &= ~ROCKET_MODE_MASK;
+ switch (pc104[board][line]) {
+ case 422:
+ info->flags |= ROCKET_MODE_RS422;
+ break;
+ case 485:
+ info->flags |= ROCKET_MODE_RS485;
+ break;
+ case 232:
+ default:
+ info->flags |= ROCKET_MODE_RS232;
+ break;
+ }
+
+ info->intmask = RXF_TRIG | TXFIFO_MT | SRC_INT | DELTA_CD | DELTA_CTS | DELTA_DSR;
+ if (sInitChan(ctlp, &info->channel, aiop, chan) == 0) {
+ printk(KERN_ERR "RocketPort sInitChan(%d, %d, %d) failed!\n",
+ board, aiop, chan);
+ kfree(info);
+ return;
+ }
+
+ rocketMode = info->flags & ROCKET_MODE_MASK;
+
+ if ((info->flags & ROCKET_RTS_TOGGLE) || (rocketMode == ROCKET_MODE_RS485))
+ sEnRTSToggle(&info->channel);
+ else
+ sDisRTSToggle(&info->channel);
+
+ if (ctlp->boardType == ROCKET_TYPE_PC104) {
+ switch (rocketMode) {
+ case ROCKET_MODE_RS485:
+ sSetInterfaceMode(&info->channel, InterfaceModeRS485);
+ break;
+ case ROCKET_MODE_RS422:
+ sSetInterfaceMode(&info->channel, InterfaceModeRS422);
+ break;
+ case ROCKET_MODE_RS232:
+ default:
+ if (info->flags & ROCKET_RTS_TOGGLE)
+ sSetInterfaceMode(&info->channel, InterfaceModeRS232T);
+ else
+ sSetInterfaceMode(&info->channel, InterfaceModeRS232);
+ break;
+ }
+ }
+ spin_lock_init(&info->slock);
+ mutex_init(&info->write_mtx);
+ rp_table[line] = info;
+ tty_register_device(rocket_driver, line, pci_dev ? &pci_dev->dev :
+ NULL);
+}
+
+/*
+ * Configures a rocketport port according to its termio settings. Called from
+ * user mode into the driver (exception handler). *info CD manipulation is spinlock protected.
+ */
+static void configure_r_port(struct tty_struct *tty, struct r_port *info,
+ struct ktermios *old_termios)
+{
+ unsigned cflag;
+ unsigned long flags;
+ unsigned rocketMode;
+ int bits, baud, divisor;
+ CHANNEL_t *cp;
+ struct ktermios *t = tty->termios;
+
+ cp = &info->channel;
+ cflag = t->c_cflag;
+
+ /* Byte size and parity */
+ if ((cflag & CSIZE) == CS8) {
+ sSetData8(cp);
+ bits = 10;
+ } else {
+ sSetData7(cp);
+ bits = 9;
+ }
+ if (cflag & CSTOPB) {
+ sSetStop2(cp);
+ bits++;
+ } else {
+ sSetStop1(cp);
+ }
+
+ if (cflag & PARENB) {
+ sEnParity(cp);
+ bits++;
+ if (cflag & PARODD) {
+ sSetOddParity(cp);
+ } else {
+ sSetEvenParity(cp);
+ }
+ } else {
+ sDisParity(cp);
+ }
+
+ /* baud rate */
+ baud = tty_get_baud_rate(tty);
+ if (!baud)
+ baud = 9600;
+ divisor = ((rp_baud_base[info->board] + (baud >> 1)) / baud) - 1;
+ if ((divisor >= 8192 || divisor < 0) && old_termios) {
+ baud = tty_termios_baud_rate(old_termios);
+ if (!baud)
+ baud = 9600;
+ divisor = (rp_baud_base[info->board] / baud) - 1;
+ }
+ if (divisor >= 8192 || divisor < 0) {
+ baud = 9600;
+ divisor = (rp_baud_base[info->board] / baud) - 1;
+ }
+ info->cps = baud / bits;
+ sSetBaud(cp, divisor);
+
+ /* FIXME: Should really back compute a baud rate from the divisor */
+ tty_encode_baud_rate(tty, baud, baud);
+
+ if (cflag & CRTSCTS) {
+ info->intmask |= DELTA_CTS;
+ sEnCTSFlowCtl(cp);
+ } else {
+ info->intmask &= ~DELTA_CTS;
+ sDisCTSFlowCtl(cp);
+ }
+ if (cflag & CLOCAL) {
+ info->intmask &= ~DELTA_CD;
+ } else {
+ spin_lock_irqsave(&info->slock, flags);
+ if (sGetChanStatus(cp) & CD_ACT)
+ info->cd_status = 1;
+ else
+ info->cd_status = 0;
+ info->intmask |= DELTA_CD;
+ spin_unlock_irqrestore(&info->slock, flags);
+ }
+
+ /*
+ * Handle software flow control in the board
+ */
+#ifdef ROCKET_SOFT_FLOW
+ if (I_IXON(tty)) {
+ sEnTxSoftFlowCtl(cp);
+ if (I_IXANY(tty)) {
+ sEnIXANY(cp);
+ } else {
+ sDisIXANY(cp);
+ }
+ sSetTxXONChar(cp, START_CHAR(tty));
+ sSetTxXOFFChar(cp, STOP_CHAR(tty));
+ } else {
+ sDisTxSoftFlowCtl(cp);
+ sDisIXANY(cp);
+ sClrTxXOFF(cp);
+ }
+#endif
+
+ /*
+ * Set up ignore/read mask words
+ */
+ info->read_status_mask = STMRCVROVRH | 0xFF;
+ if (I_INPCK(tty))
+ info->read_status_mask |= STMFRAMEH | STMPARITYH;
+ if (I_BRKINT(tty) || I_PARMRK(tty))
+ info->read_status_mask |= STMBREAKH;
+
+ /*
+ * Characters to ignore
+ */
+ info->ignore_status_mask = 0;
+ if (I_IGNPAR(tty))
+ info->ignore_status_mask |= STMFRAMEH | STMPARITYH;
+ if (I_IGNBRK(tty)) {
+ info->ignore_status_mask |= STMBREAKH;
+ /*
+ * If we're ignoring parity and break indicators,
+ * ignore overruns too. (For real raw support).
+ */
+ if (I_IGNPAR(tty))
+ info->ignore_status_mask |= STMRCVROVRH;
+ }
+
+ rocketMode = info->flags & ROCKET_MODE_MASK;
+
+ if ((info->flags & ROCKET_RTS_TOGGLE)
+ || (rocketMode == ROCKET_MODE_RS485))
+ sEnRTSToggle(cp);
+ else
+ sDisRTSToggle(cp);
+
+ sSetRTS(&info->channel);
+
+ if (cp->CtlP->boardType == ROCKET_TYPE_PC104) {
+ switch (rocketMode) {
+ case ROCKET_MODE_RS485:
+ sSetInterfaceMode(cp, InterfaceModeRS485);
+ break;
+ case ROCKET_MODE_RS422:
+ sSetInterfaceMode(cp, InterfaceModeRS422);
+ break;
+ case ROCKET_MODE_RS232:
+ default:
+ if (info->flags & ROCKET_RTS_TOGGLE)
+ sSetInterfaceMode(cp, InterfaceModeRS232T);
+ else
+ sSetInterfaceMode(cp, InterfaceModeRS232);
+ break;
+ }
+ }
+}
+
+static int carrier_raised(struct tty_port *port)
+{
+ struct r_port *info = container_of(port, struct r_port, port);
+ return (sGetChanStatusLo(&info->channel) & CD_ACT) ? 1 : 0;
+}
+
+static void dtr_rts(struct tty_port *port, int on)
+{
+ struct r_port *info = container_of(port, struct r_port, port);
+ if (on) {
+ sSetDTR(&info->channel);
+ sSetRTS(&info->channel);
+ } else {
+ sClrDTR(&info->channel);
+ sClrRTS(&info->channel);
+ }
+}
+
+/*
+ * Exception handler that opens a serial port. Creates xmit_buf storage, fills in
+ * port's r_port struct. Initializes the port hardware.
+ */
+static int rp_open(struct tty_struct *tty, struct file *filp)
+{
+ struct r_port *info;
+ struct tty_port *port;
+ int line = 0, retval;
+ CHANNEL_t *cp;
+ unsigned long page;
+
+ line = tty->index;
+ if (line < 0 || line >= MAX_RP_PORTS || ((info = rp_table[line]) == NULL))
+ return -ENXIO;
+ port = &info->port;
+
+ page = __get_free_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ if (port->flags & ASYNC_CLOSING) {
+ retval = wait_for_completion_interruptible(&info->close_wait);
+ free_page(page);
+ if (retval)
+ return retval;
+ return ((port->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS);
+ }
+
+ /*
+ * We must not sleep from here until the port is marked fully in use.
+ */
+ if (info->xmit_buf)
+ free_page(page);
+ else
+ info->xmit_buf = (unsigned char *) page;
+
+ tty->driver_data = info;
+ tty_port_tty_set(port, tty);
+
+ if (port->count++ == 0) {
+ atomic_inc(&rp_num_ports_open);
+
+#ifdef ROCKET_DEBUG_OPEN
+ printk(KERN_INFO "rocket mod++ = %d...\n",
+ atomic_read(&rp_num_ports_open));
+#endif
+ }
+#ifdef ROCKET_DEBUG_OPEN
+ printk(KERN_INFO "rp_open ttyR%d, count=%d\n", info->line, info->port.count);
+#endif
+
+ /*
+ * Info->count is now 1; so it's safe to sleep now.
+ */
+ if (!test_bit(ASYNCB_INITIALIZED, &port->flags)) {
+ cp = &info->channel;
+ sSetRxTrigger(cp, TRIG_1);
+ if (sGetChanStatus(cp) & CD_ACT)
+ info->cd_status = 1;
+ else
+ info->cd_status = 0;
+ sDisRxStatusMode(cp);
+ sFlushRxFIFO(cp);
+ sFlushTxFIFO(cp);
+
+ sEnInterrupts(cp, (TXINT_EN | MCINT_EN | RXINT_EN | SRCINT_EN | CHANINT_EN));
+ sSetRxTrigger(cp, TRIG_1);
+
+ sGetChanStatus(cp);
+ sDisRxStatusMode(cp);
+ sClrTxXOFF(cp);
+
+ sDisCTSFlowCtl(cp);
+ sDisTxSoftFlowCtl(cp);
+
+ sEnRxFIFO(cp);
+ sEnTransmit(cp);
+
+ set_bit(ASYNCB_INITIALIZED, &info->port.flags);
+
+ /*
+ * Set up the tty->alt_speed kludge
+ */
+ if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
+ tty->alt_speed = 57600;
+ if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
+ tty->alt_speed = 115200;
+ if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
+ tty->alt_speed = 230400;
+ if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
+ tty->alt_speed = 460800;
+
+ configure_r_port(tty, info, NULL);
+ if (tty->termios->c_cflag & CBAUD) {
+ sSetDTR(cp);
+ sSetRTS(cp);
+ }
+ }
+ /* Starts (or resets) the maint polling loop */
+ mod_timer(&rocket_timer, jiffies + POLL_PERIOD);
+
+ retval = tty_port_block_til_ready(port, tty, filp);
+ if (retval) {
+#ifdef ROCKET_DEBUG_OPEN
+ printk(KERN_INFO "rp_open returning after block_til_ready with %d\n", retval);
+#endif
+ return retval;
+ }
+ return 0;
+}
+
+/*
+ * Exception handler that closes a serial port. info->port.count is considered critical.
+ */
+static void rp_close(struct tty_struct *tty, struct file *filp)
+{
+ struct r_port *info = tty->driver_data;
+ struct tty_port *port = &info->port;
+ int timeout;
+ CHANNEL_t *cp;
+
+ if (rocket_paranoia_check(info, "rp_close"))
+ return;
+
+#ifdef ROCKET_DEBUG_OPEN
+ printk(KERN_INFO "rp_close ttyR%d, count = %d\n", info->line, info->port.count);
+#endif
+
+ if (tty_port_close_start(port, tty, filp) == 0)
+ return;
+
+ mutex_lock(&port->mutex);
+ cp = &info->channel;
+ /*
+ * Before we drop DTR, make sure the UART transmitter
+ * has completely drained; this is especially
+ * important if there is a transmit FIFO!
+ */
+ timeout = (sGetTxCnt(cp) + 1) * HZ / info->cps;
+ if (timeout == 0)
+ timeout = 1;
+ rp_wait_until_sent(tty, timeout);
+ clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
+
+ sDisTransmit(cp);
+ sDisInterrupts(cp, (TXINT_EN | MCINT_EN | RXINT_EN | SRCINT_EN | CHANINT_EN));
+ sDisCTSFlowCtl(cp);
+ sDisTxSoftFlowCtl(cp);
+ sClrTxXOFF(cp);
+ sFlushRxFIFO(cp);
+ sFlushTxFIFO(cp);
+ sClrRTS(cp);
+ if (C_HUPCL(tty))
+ sClrDTR(cp);
+
+ rp_flush_buffer(tty);
+
+ tty_ldisc_flush(tty);
+
+ clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
+
+ /* We can't yet use tty_port_close_end as the buffer handling in this
+ driver is a bit different to the usual */
+
+ if (port->blocked_open) {
+ if (port->close_delay) {
+ msleep_interruptible(jiffies_to_msecs(port->close_delay));
+ }
+ wake_up_interruptible(&port->open_wait);
+ } else {
+ if (info->xmit_buf) {
+ free_page((unsigned long) info->xmit_buf);
+ info->xmit_buf = NULL;
+ }
+ }
+ spin_lock_irq(&port->lock);
+ info->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_CLOSING | ASYNC_NORMAL_ACTIVE);
+ tty->closing = 0;
+ spin_unlock_irq(&port->lock);
+ mutex_unlock(&port->mutex);
+ tty_port_tty_set(port, NULL);
+
+ wake_up_interruptible(&port->close_wait);
+ complete_all(&info->close_wait);
+ atomic_dec(&rp_num_ports_open);
+
+#ifdef ROCKET_DEBUG_OPEN
+ printk(KERN_INFO "rocket mod-- = %d...\n",
+ atomic_read(&rp_num_ports_open));
+ printk(KERN_INFO "rp_close ttyR%d complete shutdown\n", info->line);
+#endif
+
+}
+
+static void rp_set_termios(struct tty_struct *tty,
+ struct ktermios *old_termios)
+{
+ struct r_port *info = tty->driver_data;
+ CHANNEL_t *cp;
+ unsigned cflag;
+
+ if (rocket_paranoia_check(info, "rp_set_termios"))
+ return;
+
+ cflag = tty->termios->c_cflag;
+
+ /*
+ * This driver doesn't support CS5 or CS6
+ */
+ if (((cflag & CSIZE) == CS5) || ((cflag & CSIZE) == CS6))
+ tty->termios->c_cflag =
+ ((cflag & ~CSIZE) | (old_termios->c_cflag & CSIZE));
+ /* Or CMSPAR */
+ tty->termios->c_cflag &= ~CMSPAR;
+
+ configure_r_port(tty, info, old_termios);
+
+ cp = &info->channel;
+
+ /* Handle transition to B0 status */
+ if ((old_termios->c_cflag & CBAUD) && !(tty->termios->c_cflag & CBAUD)) {
+ sClrDTR(cp);
+ sClrRTS(cp);
+ }
+
+ /* Handle transition away from B0 status */
+ if (!(old_termios->c_cflag & CBAUD) && (tty->termios->c_cflag & CBAUD)) {
+ if (!tty->hw_stopped || !(tty->termios->c_cflag & CRTSCTS))
+ sSetRTS(cp);
+ sSetDTR(cp);
+ }
+
+ if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ rp_start(tty);
+ }
+}
+
+static int rp_break(struct tty_struct *tty, int break_state)
+{
+ struct r_port *info = tty->driver_data;
+ unsigned long flags;
+
+ if (rocket_paranoia_check(info, "rp_break"))
+ return -EINVAL;
+
+ spin_lock_irqsave(&info->slock, flags);
+ if (break_state == -1)
+ sSendBreak(&info->channel);
+ else
+ sClrBreak(&info->channel);
+ spin_unlock_irqrestore(&info->slock, flags);
+ return 0;
+}
+
+/*
+ * sGetChanRI used to be a macro in rocket_int.h. When the functionality for
+ * the UPCI boards was added, it was decided to make this a function because
+ * the macro was getting too complicated. All cases except the first one
+ * (UPCIRingInd) are taken directly from the original macro.
+ */
+static int sGetChanRI(CHANNEL_T * ChP)
+{
+ CONTROLLER_t *CtlP = ChP->CtlP;
+ int ChanNum = ChP->ChanNum;
+ int RingInd = 0;
+
+ if (CtlP->UPCIRingInd)
+ RingInd = !(sInB(CtlP->UPCIRingInd) & sBitMapSetTbl[ChanNum]);
+ else if (CtlP->AltChanRingIndicator)
+ RingInd = sInB((ByteIO_t) (ChP->ChanStat + 8)) & DSR_ACT;
+ else if (CtlP->boardType == ROCKET_TYPE_PC104)
+ RingInd = !(sInB(CtlP->AiopIO[3]) & sBitMapSetTbl[ChanNum]);
+
+ return RingInd;
+}
+
+/********************************************************************************************/
+/* Here are the routines used by rp_ioctl. These are all called from exception handlers. */
+
+/*
+ * Returns the state of the serial modem control lines. These next 2 functions
+ * are the way kernel versions > 2.5 handle modem control lines rather than IOCTLs.
+ */
+static int rp_tiocmget(struct tty_struct *tty)
+{
+ struct r_port *info = tty->driver_data;
+ unsigned int control, result, ChanStatus;
+
+ ChanStatus = sGetChanStatusLo(&info->channel);
+ control = info->channel.TxControl[3];
+ result = ((control & SET_RTS) ? TIOCM_RTS : 0) |
+ ((control & SET_DTR) ? TIOCM_DTR : 0) |
+ ((ChanStatus & CD_ACT) ? TIOCM_CAR : 0) |
+ (sGetChanRI(&info->channel) ? TIOCM_RNG : 0) |
+ ((ChanStatus & DSR_ACT) ? TIOCM_DSR : 0) |
+ ((ChanStatus & CTS_ACT) ? TIOCM_CTS : 0);
+
+ return result;
+}
+
+/*
+ * Sets the modem control lines
+ */
+static int rp_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct r_port *info = tty->driver_data;
+
+ if (set & TIOCM_RTS)
+ info->channel.TxControl[3] |= SET_RTS;
+ if (set & TIOCM_DTR)
+ info->channel.TxControl[3] |= SET_DTR;
+ if (clear & TIOCM_RTS)
+ info->channel.TxControl[3] &= ~SET_RTS;
+ if (clear & TIOCM_DTR)
+ info->channel.TxControl[3] &= ~SET_DTR;
+
+ out32(info->channel.IndexAddr, info->channel.TxControl);
+ return 0;
+}
+
+static int get_config(struct r_port *info, struct rocket_config __user *retinfo)
+{
+ struct rocket_config tmp;
+
+ if (!retinfo)
+ return -EFAULT;
+ memset(&tmp, 0, sizeof (tmp));
+ mutex_lock(&info->port.mutex);
+ tmp.line = info->line;
+ tmp.flags = info->flags;
+ tmp.close_delay = info->port.close_delay;
+ tmp.closing_wait = info->port.closing_wait;
+ tmp.port = rcktpt_io_addr[(info->line >> 5) & 3];
+ mutex_unlock(&info->port.mutex);
+
+ if (copy_to_user(retinfo, &tmp, sizeof (*retinfo)))
+ return -EFAULT;
+ return 0;
+}
+
+static int set_config(struct tty_struct *tty, struct r_port *info,
+ struct rocket_config __user *new_info)
+{
+ struct rocket_config new_serial;
+
+ if (copy_from_user(&new_serial, new_info, sizeof (new_serial)))
+ return -EFAULT;
+
+ mutex_lock(&info->port.mutex);
+ if (!capable(CAP_SYS_ADMIN))
+ {
+ if ((new_serial.flags & ~ROCKET_USR_MASK) != (info->flags & ~ROCKET_USR_MASK)) {
+ mutex_unlock(&info->port.mutex);
+ return -EPERM;
+ }
+ info->flags = ((info->flags & ~ROCKET_USR_MASK) | (new_serial.flags & ROCKET_USR_MASK));
+ configure_r_port(tty, info, NULL);
+ mutex_unlock(&info->port.mutex);
+ return 0;
+ }
+
+ info->flags = ((info->flags & ~ROCKET_FLAGS) | (new_serial.flags & ROCKET_FLAGS));
+ info->port.close_delay = new_serial.close_delay;
+ info->port.closing_wait = new_serial.closing_wait;
+
+ if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
+ tty->alt_speed = 57600;
+ if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
+ tty->alt_speed = 115200;
+ if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
+ tty->alt_speed = 230400;
+ if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
+ tty->alt_speed = 460800;
+ mutex_unlock(&info->port.mutex);
+
+ configure_r_port(tty, info, NULL);
+ return 0;
+}
+
+/*
+ * This function fills in a rocket_ports struct with information
+ * about what boards/ports are in the system. This info is passed
+ * to user space. See setrocket.c where the info is used to create
+ * the /dev/ttyRx ports.
+ */
+static int get_ports(struct r_port *info, struct rocket_ports __user *retports)
+{
+ struct rocket_ports tmp;
+ int board;
+
+ if (!retports)
+ return -EFAULT;
+ memset(&tmp, 0, sizeof (tmp));
+ tmp.tty_major = rocket_driver->major;
+
+ for (board = 0; board < 4; board++) {
+ tmp.rocketModel[board].model = rocketModel[board].model;
+ strcpy(tmp.rocketModel[board].modelString, rocketModel[board].modelString);
+ tmp.rocketModel[board].numPorts = rocketModel[board].numPorts;
+ tmp.rocketModel[board].loadrm2 = rocketModel[board].loadrm2;
+ tmp.rocketModel[board].startingPortNumber = rocketModel[board].startingPortNumber;
+ }
+ if (copy_to_user(retports, &tmp, sizeof (*retports)))
+ return -EFAULT;
+ return 0;
+}
+
+static int reset_rm2(struct r_port *info, void __user *arg)
+{
+ int reset;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&reset, arg, sizeof (int)))
+ return -EFAULT;
+ if (reset)
+ reset = 1;
+
+ if (rcktpt_type[info->board] != ROCKET_TYPE_MODEMII &&
+ rcktpt_type[info->board] != ROCKET_TYPE_MODEMIII)
+ return -EINVAL;
+
+ if (info->ctlp->BusType == isISA)
+ sModemReset(info->ctlp, info->chan, reset);
+ else
+ sPCIModemReset(info->ctlp, info->chan, reset);
+
+ return 0;
+}
+
+static int get_version(struct r_port *info, struct rocket_version __user *retvers)
+{
+ if (copy_to_user(retvers, &driver_version, sizeof (*retvers)))
+ return -EFAULT;
+ return 0;
+}
+
+/* IOCTL call handler into the driver */
+static int rp_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct r_port *info = tty->driver_data;
+ void __user *argp = (void __user *)arg;
+ int ret = 0;
+
+ if (cmd != RCKP_GET_PORTS && rocket_paranoia_check(info, "rp_ioctl"))
+ return -ENXIO;
+
+ switch (cmd) {
+ case RCKP_GET_STRUCT:
+ if (copy_to_user(argp, info, sizeof (struct r_port)))
+ ret = -EFAULT;
+ break;
+ case RCKP_GET_CONFIG:
+ ret = get_config(info, argp);
+ break;
+ case RCKP_SET_CONFIG:
+ ret = set_config(tty, info, argp);
+ break;
+ case RCKP_GET_PORTS:
+ ret = get_ports(info, argp);
+ break;
+ case RCKP_RESET_RM2:
+ ret = reset_rm2(info, argp);
+ break;
+ case RCKP_GET_VERSION:
+ ret = get_version(info, argp);
+ break;
+ default:
+ ret = -ENOIOCTLCMD;
+ }
+ return ret;
+}
+
+static void rp_send_xchar(struct tty_struct *tty, char ch)
+{
+ struct r_port *info = tty->driver_data;
+ CHANNEL_t *cp;
+
+ if (rocket_paranoia_check(info, "rp_send_xchar"))
+ return;
+
+ cp = &info->channel;
+ if (sGetTxCnt(cp))
+ sWriteTxPrioByte(cp, ch);
+ else
+ sWriteTxByte(sGetTxRxDataIO(cp), ch);
+}
+
+static void rp_throttle(struct tty_struct *tty)
+{
+ struct r_port *info = tty->driver_data;
+ CHANNEL_t *cp;
+
+#ifdef ROCKET_DEBUG_THROTTLE
+ printk(KERN_INFO "throttle %s: %d....\n", tty->name,
+ tty->ldisc.chars_in_buffer(tty));
+#endif
+
+ if (rocket_paranoia_check(info, "rp_throttle"))
+ return;
+
+ cp = &info->channel;
+ if (I_IXOFF(tty))
+ rp_send_xchar(tty, STOP_CHAR(tty));
+
+ sClrRTS(&info->channel);
+}
+
+static void rp_unthrottle(struct tty_struct *tty)
+{
+ struct r_port *info = tty->driver_data;
+ CHANNEL_t *cp;
+#ifdef ROCKET_DEBUG_THROTTLE
+ printk(KERN_INFO "unthrottle %s: %d....\n", tty->name,
+ tty->ldisc.chars_in_buffer(tty));
+#endif
+
+ if (rocket_paranoia_check(info, "rp_throttle"))
+ return;
+
+ cp = &info->channel;
+ if (I_IXOFF(tty))
+ rp_send_xchar(tty, START_CHAR(tty));
+
+ sSetRTS(&info->channel);
+}
+
+/*
+ * ------------------------------------------------------------
+ * rp_stop() and rp_start()
+ *
+ * This routines are called before setting or resetting tty->stopped.
+ * They enable or disable transmitter interrupts, as necessary.
+ * ------------------------------------------------------------
+ */
+static void rp_stop(struct tty_struct *tty)
+{
+ struct r_port *info = tty->driver_data;
+
+#ifdef ROCKET_DEBUG_FLOW
+ printk(KERN_INFO "stop %s: %d %d....\n", tty->name,
+ info->xmit_cnt, info->xmit_fifo_room);
+#endif
+
+ if (rocket_paranoia_check(info, "rp_stop"))
+ return;
+
+ if (sGetTxCnt(&info->channel))
+ sDisTransmit(&info->channel);
+}
+
+static void rp_start(struct tty_struct *tty)
+{
+ struct r_port *info = tty->driver_data;
+
+#ifdef ROCKET_DEBUG_FLOW
+ printk(KERN_INFO "start %s: %d %d....\n", tty->name,
+ info->xmit_cnt, info->xmit_fifo_room);
+#endif
+
+ if (rocket_paranoia_check(info, "rp_stop"))
+ return;
+
+ sEnTransmit(&info->channel);
+ set_bit((info->aiop * 8) + info->chan,
+ (void *) &xmit_flags[info->board]);
+}
+
+/*
+ * rp_wait_until_sent() --- wait until the transmitter is empty
+ */
+static void rp_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ struct r_port *info = tty->driver_data;
+ CHANNEL_t *cp;
+ unsigned long orig_jiffies;
+ int check_time, exit_time;
+ int txcnt;
+
+ if (rocket_paranoia_check(info, "rp_wait_until_sent"))
+ return;
+
+ cp = &info->channel;
+
+ orig_jiffies = jiffies;
+#ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT
+ printk(KERN_INFO "In RP_wait_until_sent(%d) (jiff=%lu)...\n", timeout,
+ jiffies);
+ printk(KERN_INFO "cps=%d...\n", info->cps);
+#endif
+ while (1) {
+ txcnt = sGetTxCnt(cp);
+ if (!txcnt) {
+ if (sGetChanStatusLo(cp) & TXSHRMT)
+ break;
+ check_time = (HZ / info->cps) / 5;
+ } else {
+ check_time = HZ * txcnt / info->cps;
+ }
+ if (timeout) {
+ exit_time = orig_jiffies + timeout - jiffies;
+ if (exit_time <= 0)
+ break;
+ if (exit_time < check_time)
+ check_time = exit_time;
+ }
+ if (check_time == 0)
+ check_time = 1;
+#ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT
+ printk(KERN_INFO "txcnt = %d (jiff=%lu,check=%d)...\n", txcnt,
+ jiffies, check_time);
+#endif
+ msleep_interruptible(jiffies_to_msecs(check_time));
+ if (signal_pending(current))
+ break;
+ }
+ __set_current_state(TASK_RUNNING);
+#ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT
+ printk(KERN_INFO "txcnt = %d (jiff=%lu)...done\n", txcnt, jiffies);
+#endif
+}
+
+/*
+ * rp_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+static void rp_hangup(struct tty_struct *tty)
+{
+ CHANNEL_t *cp;
+ struct r_port *info = tty->driver_data;
+ unsigned long flags;
+
+ if (rocket_paranoia_check(info, "rp_hangup"))
+ return;
+
+#if (defined(ROCKET_DEBUG_OPEN) || defined(ROCKET_DEBUG_HANGUP))
+ printk(KERN_INFO "rp_hangup of ttyR%d...\n", info->line);
+#endif
+ rp_flush_buffer(tty);
+ spin_lock_irqsave(&info->port.lock, flags);
+ if (info->port.flags & ASYNC_CLOSING) {
+ spin_unlock_irqrestore(&info->port.lock, flags);
+ return;
+ }
+ if (info->port.count)
+ atomic_dec(&rp_num_ports_open);
+ clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
+ spin_unlock_irqrestore(&info->port.lock, flags);
+
+ tty_port_hangup(&info->port);
+
+ cp = &info->channel;
+ sDisRxFIFO(cp);
+ sDisTransmit(cp);
+ sDisInterrupts(cp, (TXINT_EN | MCINT_EN | RXINT_EN | SRCINT_EN | CHANINT_EN));
+ sDisCTSFlowCtl(cp);
+ sDisTxSoftFlowCtl(cp);
+ sClrTxXOFF(cp);
+ clear_bit(ASYNCB_INITIALIZED, &info->port.flags);
+
+ wake_up_interruptible(&info->port.open_wait);
+}
+
+/*
+ * Exception handler - write char routine. The RocketPort driver uses a
+ * double-buffering strategy, with the twist that if the in-memory CPU
+ * buffer is empty, and there's space in the transmit FIFO, the
+ * writing routines will write directly to transmit FIFO.
+ * Write buffer and counters protected by spinlocks
+ */
+static int rp_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct r_port *info = tty->driver_data;
+ CHANNEL_t *cp;
+ unsigned long flags;
+
+ if (rocket_paranoia_check(info, "rp_put_char"))
+ return 0;
+
+ /*
+ * Grab the port write mutex, locking out other processes that try to
+ * write to this port
+ */
+ mutex_lock(&info->write_mtx);
+
+#ifdef ROCKET_DEBUG_WRITE
+ printk(KERN_INFO "rp_put_char %c...\n", ch);
+#endif
+
+ spin_lock_irqsave(&info->slock, flags);
+ cp = &info->channel;
+
+ if (!tty->stopped && !tty->hw_stopped && info->xmit_fifo_room == 0)
+ info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
+
+ if (tty->stopped || tty->hw_stopped || info->xmit_fifo_room == 0 || info->xmit_cnt != 0) {
+ info->xmit_buf[info->xmit_head++] = ch;
+ info->xmit_head &= XMIT_BUF_SIZE - 1;
+ info->xmit_cnt++;
+ set_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
+ } else {
+ sOutB(sGetTxRxDataIO(cp), ch);
+ info->xmit_fifo_room--;
+ }
+ spin_unlock_irqrestore(&info->slock, flags);
+ mutex_unlock(&info->write_mtx);
+ return 1;
+}
+
+/*
+ * Exception handler - write routine, called when user app writes to the device.
+ * A per port write mutex is used to protect from another process writing to
+ * this port at the same time. This other process could be running on the other CPU
+ * or get control of the CPU if the copy_from_user() blocks due to a page fault (swapped out).
+ * Spinlocks protect the info xmit members.
+ */
+static int rp_write(struct tty_struct *tty,
+ const unsigned char *buf, int count)
+{
+ struct r_port *info = tty->driver_data;
+ CHANNEL_t *cp;
+ const unsigned char *b;
+ int c, retval = 0;
+ unsigned long flags;
+
+ if (count <= 0 || rocket_paranoia_check(info, "rp_write"))
+ return 0;
+
+ if (mutex_lock_interruptible(&info->write_mtx))
+ return -ERESTARTSYS;
+
+#ifdef ROCKET_DEBUG_WRITE
+ printk(KERN_INFO "rp_write %d chars...\n", count);
+#endif
+ cp = &info->channel;
+
+ if (!tty->stopped && !tty->hw_stopped && info->xmit_fifo_room < count)
+ info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
+
+ /*
+ * If the write queue for the port is empty, and there is FIFO space, stuff bytes
+ * into FIFO. Use the write queue for temp storage.
+ */
+ if (!tty->stopped && !tty->hw_stopped && info->xmit_cnt == 0 && info->xmit_fifo_room > 0) {
+ c = min(count, info->xmit_fifo_room);
+ b = buf;
+
+ /* Push data into FIFO, 2 bytes at a time */
+ sOutStrW(sGetTxRxDataIO(cp), (unsigned short *) b, c / 2);
+
+ /* If there is a byte remaining, write it */
+ if (c & 1)
+ sOutB(sGetTxRxDataIO(cp), b[c - 1]);
+
+ retval += c;
+ buf += c;
+ count -= c;
+
+ spin_lock_irqsave(&info->slock, flags);
+ info->xmit_fifo_room -= c;
+ spin_unlock_irqrestore(&info->slock, flags);
+ }
+
+ /* If count is zero, we wrote it all and are done */
+ if (!count)
+ goto end;
+
+ /* Write remaining data into the port's xmit_buf */
+ while (1) {
+ /* Hung up ? */
+ if (!test_bit(ASYNCB_NORMAL_ACTIVE, &info->port.flags))
+ goto end;
+ c = min(count, XMIT_BUF_SIZE - info->xmit_cnt - 1);
+ c = min(c, XMIT_BUF_SIZE - info->xmit_head);
+ if (c <= 0)
+ break;
+
+ b = buf;
+ memcpy(info->xmit_buf + info->xmit_head, b, c);
+
+ spin_lock_irqsave(&info->slock, flags);
+ info->xmit_head =
+ (info->xmit_head + c) & (XMIT_BUF_SIZE - 1);
+ info->xmit_cnt += c;
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ buf += c;
+ count -= c;
+ retval += c;
+ }
+
+ if ((retval > 0) && !tty->stopped && !tty->hw_stopped)
+ set_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]);
+
+end:
+ if (info->xmit_cnt < WAKEUP_CHARS) {
+ tty_wakeup(tty);
+#ifdef ROCKETPORT_HAVE_POLL_WAIT
+ wake_up_interruptible(&tty->poll_wait);
+#endif
+ }
+ mutex_unlock(&info->write_mtx);
+ return retval;
+}
+
+/*
+ * Return the number of characters that can be sent. We estimate
+ * only using the in-memory transmit buffer only, and ignore the
+ * potential space in the transmit FIFO.
+ */
+static int rp_write_room(struct tty_struct *tty)
+{
+ struct r_port *info = tty->driver_data;
+ int ret;
+
+ if (rocket_paranoia_check(info, "rp_write_room"))
+ return 0;
+
+ ret = XMIT_BUF_SIZE - info->xmit_cnt - 1;
+ if (ret < 0)
+ ret = 0;
+#ifdef ROCKET_DEBUG_WRITE
+ printk(KERN_INFO "rp_write_room returns %d...\n", ret);
+#endif
+ return ret;
+}
+
+/*
+ * Return the number of characters in the buffer. Again, this only
+ * counts those characters in the in-memory transmit buffer.
+ */
+static int rp_chars_in_buffer(struct tty_struct *tty)
+{
+ struct r_port *info = tty->driver_data;
+ CHANNEL_t *cp;
+
+ if (rocket_paranoia_check(info, "rp_chars_in_buffer"))
+ return 0;
+
+ cp = &info->channel;
+
+#ifdef ROCKET_DEBUG_WRITE
+ printk(KERN_INFO "rp_chars_in_buffer returns %d...\n", info->xmit_cnt);
+#endif
+ return info->xmit_cnt;
+}
+
+/*
+ * Flushes the TX fifo for a port, deletes data in the xmit_buf stored in the
+ * r_port struct for the port. Note that spinlock are used to protect info members,
+ * do not call this function if the spinlock is already held.
+ */
+static void rp_flush_buffer(struct tty_struct *tty)
+{
+ struct r_port *info = tty->driver_data;
+ CHANNEL_t *cp;
+ unsigned long flags;
+
+ if (rocket_paranoia_check(info, "rp_flush_buffer"))
+ return;
+
+ spin_lock_irqsave(&info->slock, flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ spin_unlock_irqrestore(&info->slock, flags);
+
+#ifdef ROCKETPORT_HAVE_POLL_WAIT
+ wake_up_interruptible(&tty->poll_wait);
+#endif
+ tty_wakeup(tty);
+
+ cp = &info->channel;
+ sFlushTxFIFO(cp);
+}
+
+#ifdef CONFIG_PCI
+
+static struct pci_device_id __devinitdata __used rocket_pci_ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_RP, PCI_ANY_ID) },
+ { }
+};
+MODULE_DEVICE_TABLE(pci, rocket_pci_ids);
+
+/*
+ * Called when a PCI card is found. Retrieves and stores model information,
+ * init's aiopic and serial port hardware.
+ * Inputs: i is the board number (0-n)
+ */
+static __init int register_PCI(int i, struct pci_dev *dev)
+{
+ int num_aiops, aiop, max_num_aiops, num_chan, chan;
+ unsigned int aiopio[MAX_AIOPS_PER_BOARD];
+ char *str, *board_type;
+ CONTROLLER_t *ctlp;
+
+ int fast_clock = 0;
+ int altChanRingIndicator = 0;
+ int ports_per_aiop = 8;
+ WordIO_t ConfigIO = 0;
+ ByteIO_t UPCIRingInd = 0;
+
+ if (!dev || pci_enable_device(dev))
+ return 0;
+
+ rcktpt_io_addr[i] = pci_resource_start(dev, 0);
+
+ rcktpt_type[i] = ROCKET_TYPE_NORMAL;
+ rocketModel[i].loadrm2 = 0;
+ rocketModel[i].startingPortNumber = nextLineNumber;
+
+ /* Depending on the model, set up some config variables */
+ switch (dev->device) {
+ case PCI_DEVICE_ID_RP4QUAD:
+ str = "Quadcable";
+ max_num_aiops = 1;
+ ports_per_aiop = 4;
+ rocketModel[i].model = MODEL_RP4QUAD;
+ strcpy(rocketModel[i].modelString, "RocketPort 4 port w/quad cable");
+ rocketModel[i].numPorts = 4;
+ break;
+ case PCI_DEVICE_ID_RP8OCTA:
+ str = "Octacable";
+ max_num_aiops = 1;
+ rocketModel[i].model = MODEL_RP8OCTA;
+ strcpy(rocketModel[i].modelString, "RocketPort 8 port w/octa cable");
+ rocketModel[i].numPorts = 8;
+ break;
+ case PCI_DEVICE_ID_URP8OCTA:
+ str = "Octacable";
+ max_num_aiops = 1;
+ rocketModel[i].model = MODEL_UPCI_RP8OCTA;
+ strcpy(rocketModel[i].modelString, "RocketPort UPCI 8 port w/octa cable");
+ rocketModel[i].numPorts = 8;
+ break;
+ case PCI_DEVICE_ID_RP8INTF:
+ str = "8";
+ max_num_aiops = 1;
+ rocketModel[i].model = MODEL_RP8INTF;
+ strcpy(rocketModel[i].modelString, "RocketPort 8 port w/external I/F");
+ rocketModel[i].numPorts = 8;
+ break;
+ case PCI_DEVICE_ID_URP8INTF:
+ str = "8";
+ max_num_aiops = 1;
+ rocketModel[i].model = MODEL_UPCI_RP8INTF;
+ strcpy(rocketModel[i].modelString, "RocketPort UPCI 8 port w/external I/F");
+ rocketModel[i].numPorts = 8;
+ break;
+ case PCI_DEVICE_ID_RP8J:
+ str = "8J";
+ max_num_aiops = 1;
+ rocketModel[i].model = MODEL_RP8J;
+ strcpy(rocketModel[i].modelString, "RocketPort 8 port w/RJ11 connectors");
+ rocketModel[i].numPorts = 8;
+ break;
+ case PCI_DEVICE_ID_RP4J:
+ str = "4J";
+ max_num_aiops = 1;
+ ports_per_aiop = 4;
+ rocketModel[i].model = MODEL_RP4J;
+ strcpy(rocketModel[i].modelString, "RocketPort 4 port w/RJ45 connectors");
+ rocketModel[i].numPorts = 4;
+ break;
+ case PCI_DEVICE_ID_RP8SNI:
+ str = "8 (DB78 Custom)";
+ max_num_aiops = 1;
+ rocketModel[i].model = MODEL_RP8SNI;
+ strcpy(rocketModel[i].modelString, "RocketPort 8 port w/ custom DB78");
+ rocketModel[i].numPorts = 8;
+ break;
+ case PCI_DEVICE_ID_RP16SNI:
+ str = "16 (DB78 Custom)";
+ max_num_aiops = 2;
+ rocketModel[i].model = MODEL_RP16SNI;
+ strcpy(rocketModel[i].modelString, "RocketPort 16 port w/ custom DB78");
+ rocketModel[i].numPorts = 16;
+ break;
+ case PCI_DEVICE_ID_RP16INTF:
+ str = "16";
+ max_num_aiops = 2;
+ rocketModel[i].model = MODEL_RP16INTF;
+ strcpy(rocketModel[i].modelString, "RocketPort 16 port w/external I/F");
+ rocketModel[i].numPorts = 16;
+ break;
+ case PCI_DEVICE_ID_URP16INTF:
+ str = "16";
+ max_num_aiops = 2;
+ rocketModel[i].model = MODEL_UPCI_RP16INTF;
+ strcpy(rocketModel[i].modelString, "RocketPort UPCI 16 port w/external I/F");
+ rocketModel[i].numPorts = 16;
+ break;
+ case PCI_DEVICE_ID_CRP16INTF:
+ str = "16";
+ max_num_aiops = 2;
+ rocketModel[i].model = MODEL_CPCI_RP16INTF;
+ strcpy(rocketModel[i].modelString, "RocketPort Compact PCI 16 port w/external I/F");
+ rocketModel[i].numPorts = 16;
+ break;
+ case PCI_DEVICE_ID_RP32INTF:
+ str = "32";
+ max_num_aiops = 4;
+ rocketModel[i].model = MODEL_RP32INTF;
+ strcpy(rocketModel[i].modelString, "RocketPort 32 port w/external I/F");
+ rocketModel[i].numPorts = 32;
+ break;
+ case PCI_DEVICE_ID_URP32INTF:
+ str = "32";
+ max_num_aiops = 4;
+ rocketModel[i].model = MODEL_UPCI_RP32INTF;
+ strcpy(rocketModel[i].modelString, "RocketPort UPCI 32 port w/external I/F");
+ rocketModel[i].numPorts = 32;
+ break;
+ case PCI_DEVICE_ID_RPP4:
+ str = "Plus Quadcable";
+ max_num_aiops = 1;
+ ports_per_aiop = 4;
+ altChanRingIndicator++;
+ fast_clock++;
+ rocketModel[i].model = MODEL_RPP4;
+ strcpy(rocketModel[i].modelString, "RocketPort Plus 4 port");
+ rocketModel[i].numPorts = 4;
+ break;
+ case PCI_DEVICE_ID_RPP8:
+ str = "Plus Octacable";
+ max_num_aiops = 2;
+ ports_per_aiop = 4;
+ altChanRingIndicator++;
+ fast_clock++;
+ rocketModel[i].model = MODEL_RPP8;
+ strcpy(rocketModel[i].modelString, "RocketPort Plus 8 port");
+ rocketModel[i].numPorts = 8;
+ break;
+ case PCI_DEVICE_ID_RP2_232:
+ str = "Plus 2 (RS-232)";
+ max_num_aiops = 1;
+ ports_per_aiop = 2;
+ altChanRingIndicator++;
+ fast_clock++;
+ rocketModel[i].model = MODEL_RP2_232;
+ strcpy(rocketModel[i].modelString, "RocketPort Plus 2 port RS232");
+ rocketModel[i].numPorts = 2;
+ break;
+ case PCI_DEVICE_ID_RP2_422:
+ str = "Plus 2 (RS-422)";
+ max_num_aiops = 1;
+ ports_per_aiop = 2;
+ altChanRingIndicator++;
+ fast_clock++;
+ rocketModel[i].model = MODEL_RP2_422;
+ strcpy(rocketModel[i].modelString, "RocketPort Plus 2 port RS422");
+ rocketModel[i].numPorts = 2;
+ break;
+ case PCI_DEVICE_ID_RP6M:
+
+ max_num_aiops = 1;
+ ports_per_aiop = 6;
+ str = "6-port";
+
+ /* If revision is 1, the rocketmodem flash must be loaded.
+ * If it is 2 it is a "socketed" version. */
+ if (dev->revision == 1) {
+ rcktpt_type[i] = ROCKET_TYPE_MODEMII;
+ rocketModel[i].loadrm2 = 1;
+ } else {
+ rcktpt_type[i] = ROCKET_TYPE_MODEM;
+ }
+
+ rocketModel[i].model = MODEL_RP6M;
+ strcpy(rocketModel[i].modelString, "RocketModem 6 port");
+ rocketModel[i].numPorts = 6;
+ break;
+ case PCI_DEVICE_ID_RP4M:
+ max_num_aiops = 1;
+ ports_per_aiop = 4;
+ str = "4-port";
+ if (dev->revision == 1) {
+ rcktpt_type[i] = ROCKET_TYPE_MODEMII;
+ rocketModel[i].loadrm2 = 1;
+ } else {
+ rcktpt_type[i] = ROCKET_TYPE_MODEM;
+ }
+
+ rocketModel[i].model = MODEL_RP4M;
+ strcpy(rocketModel[i].modelString, "RocketModem 4 port");
+ rocketModel[i].numPorts = 4;
+ break;
+ default:
+ str = "(unknown/unsupported)";
+ max_num_aiops = 0;
+ break;
+ }
+
+ /*
+ * Check for UPCI boards.
+ */
+
+ switch (dev->device) {
+ case PCI_DEVICE_ID_URP32INTF:
+ case PCI_DEVICE_ID_URP8INTF:
+ case PCI_DEVICE_ID_URP16INTF:
+ case PCI_DEVICE_ID_CRP16INTF:
+ case PCI_DEVICE_ID_URP8OCTA:
+ rcktpt_io_addr[i] = pci_resource_start(dev, 2);
+ ConfigIO = pci_resource_start(dev, 1);
+ if (dev->device == PCI_DEVICE_ID_URP8OCTA) {
+ UPCIRingInd = rcktpt_io_addr[i] + _PCI_9030_RING_IND;
+
+ /*
+ * Check for octa or quad cable.
+ */
+ if (!
+ (sInW(ConfigIO + _PCI_9030_GPIO_CTRL) &
+ PCI_GPIO_CTRL_8PORT)) {
+ str = "Quadcable";
+ ports_per_aiop = 4;
+ rocketModel[i].numPorts = 4;
+ }
+ }
+ break;
+ case PCI_DEVICE_ID_UPCI_RM3_8PORT:
+ str = "8 ports";
+ max_num_aiops = 1;
+ rocketModel[i].model = MODEL_UPCI_RM3_8PORT;
+ strcpy(rocketModel[i].modelString, "RocketModem III 8 port");
+ rocketModel[i].numPorts = 8;
+ rcktpt_io_addr[i] = pci_resource_start(dev, 2);
+ UPCIRingInd = rcktpt_io_addr[i] + _PCI_9030_RING_IND;
+ ConfigIO = pci_resource_start(dev, 1);
+ rcktpt_type[i] = ROCKET_TYPE_MODEMIII;
+ break;
+ case PCI_DEVICE_ID_UPCI_RM3_4PORT:
+ str = "4 ports";
+ max_num_aiops = 1;
+ rocketModel[i].model = MODEL_UPCI_RM3_4PORT;
+ strcpy(rocketModel[i].modelString, "RocketModem III 4 port");
+ rocketModel[i].numPorts = 4;
+ rcktpt_io_addr[i] = pci_resource_start(dev, 2);
+ UPCIRingInd = rcktpt_io_addr[i] + _PCI_9030_RING_IND;
+ ConfigIO = pci_resource_start(dev, 1);
+ rcktpt_type[i] = ROCKET_TYPE_MODEMIII;
+ break;
+ default:
+ break;
+ }
+
+ switch (rcktpt_type[i]) {
+ case ROCKET_TYPE_MODEM:
+ board_type = "RocketModem";
+ break;
+ case ROCKET_TYPE_MODEMII:
+ board_type = "RocketModem II";
+ break;
+ case ROCKET_TYPE_MODEMIII:
+ board_type = "RocketModem III";
+ break;
+ default:
+ board_type = "RocketPort";
+ break;
+ }
+
+ if (fast_clock) {
+ sClockPrescale = 0x12; /* mod 2 (divide by 3) */
+ rp_baud_base[i] = 921600;
+ } else {
+ /*
+ * If support_low_speed is set, use the slow clock
+ * prescale, which supports 50 bps
+ */
+ if (support_low_speed) {
+ /* mod 9 (divide by 10) prescale */
+ sClockPrescale = 0x19;
+ rp_baud_base[i] = 230400;
+ } else {
+ /* mod 4 (devide by 5) prescale */
+ sClockPrescale = 0x14;
+ rp_baud_base[i] = 460800;
+ }
+ }
+
+ for (aiop = 0; aiop < max_num_aiops; aiop++)
+ aiopio[aiop] = rcktpt_io_addr[i] + (aiop * 0x40);
+ ctlp = sCtlNumToCtlPtr(i);
+ num_aiops = sPCIInitController(ctlp, i, aiopio, max_num_aiops, ConfigIO, 0, FREQ_DIS, 0, altChanRingIndicator, UPCIRingInd);
+ for (aiop = 0; aiop < max_num_aiops; aiop++)
+ ctlp->AiopNumChan[aiop] = ports_per_aiop;
+
+ dev_info(&dev->dev, "comtrol PCI controller #%d found at "
+ "address %04lx, %d AIOP(s) (%s), creating ttyR%d - %ld\n",
+ i, rcktpt_io_addr[i], num_aiops, rocketModel[i].modelString,
+ rocketModel[i].startingPortNumber,
+ rocketModel[i].startingPortNumber + rocketModel[i].numPorts-1);
+
+ if (num_aiops <= 0) {
+ rcktpt_io_addr[i] = 0;
+ return (0);
+ }
+ is_PCI[i] = 1;
+
+ /* Reset the AIOPIC, init the serial ports */
+ for (aiop = 0; aiop < num_aiops; aiop++) {
+ sResetAiopByNum(ctlp, aiop);
+ num_chan = ports_per_aiop;
+ for (chan = 0; chan < num_chan; chan++)
+ init_r_port(i, aiop, chan, dev);
+ }
+
+ /* Rocket modems must be reset */
+ if ((rcktpt_type[i] == ROCKET_TYPE_MODEM) ||
+ (rcktpt_type[i] == ROCKET_TYPE_MODEMII) ||
+ (rcktpt_type[i] == ROCKET_TYPE_MODEMIII)) {
+ num_chan = ports_per_aiop;
+ for (chan = 0; chan < num_chan; chan++)
+ sPCIModemReset(ctlp, chan, 1);
+ msleep(500);
+ for (chan = 0; chan < num_chan; chan++)
+ sPCIModemReset(ctlp, chan, 0);
+ msleep(500);
+ rmSpeakerReset(ctlp, rocketModel[i].model);
+ }
+ return (1);
+}
+
+/*
+ * Probes for PCI cards, inits them if found
+ * Input: board_found = number of ISA boards already found, or the
+ * starting board number
+ * Returns: Number of PCI boards found
+ */
+static int __init init_PCI(int boards_found)
+{
+ struct pci_dev *dev = NULL;
+ int count = 0;
+
+ /* Work through the PCI device list, pulling out ours */
+ while ((dev = pci_get_device(PCI_VENDOR_ID_RP, PCI_ANY_ID, dev))) {
+ if (register_PCI(count + boards_found, dev))
+ count++;
+ }
+ return (count);
+}
+
+#endif /* CONFIG_PCI */
+
+/*
+ * Probes for ISA cards
+ * Input: i = the board number to look for
+ * Returns: 1 if board found, 0 else
+ */
+static int __init init_ISA(int i)
+{
+ int num_aiops, num_chan = 0, total_num_chan = 0;
+ int aiop, chan;
+ unsigned int aiopio[MAX_AIOPS_PER_BOARD];
+ CONTROLLER_t *ctlp;
+ char *type_string;
+
+ /* If io_addr is zero, no board configured */
+ if (rcktpt_io_addr[i] == 0)
+ return (0);
+
+ /* Reserve the IO region */
+ if (!request_region(rcktpt_io_addr[i], 64, "Comtrol RocketPort")) {
+ printk(KERN_ERR "Unable to reserve IO region for configured "
+ "ISA RocketPort at address 0x%lx, board not "
+ "installed...\n", rcktpt_io_addr[i]);
+ rcktpt_io_addr[i] = 0;
+ return (0);
+ }
+
+ ctlp = sCtlNumToCtlPtr(i);
+
+ ctlp->boardType = rcktpt_type[i];
+
+ switch (rcktpt_type[i]) {
+ case ROCKET_TYPE_PC104:
+ type_string = "(PC104)";
+ break;
+ case ROCKET_TYPE_MODEM:
+ type_string = "(RocketModem)";
+ break;
+ case ROCKET_TYPE_MODEMII:
+ type_string = "(RocketModem II)";
+ break;
+ default:
+ type_string = "";
+ break;
+ }
+
+ /*
+ * If support_low_speed is set, use the slow clock prescale,
+ * which supports 50 bps
+ */
+ if (support_low_speed) {
+ sClockPrescale = 0x19; /* mod 9 (divide by 10) prescale */
+ rp_baud_base[i] = 230400;
+ } else {
+ sClockPrescale = 0x14; /* mod 4 (devide by 5) prescale */
+ rp_baud_base[i] = 460800;
+ }
+
+ for (aiop = 0; aiop < MAX_AIOPS_PER_BOARD; aiop++)
+ aiopio[aiop] = rcktpt_io_addr[i] + (aiop * 0x400);
+
+ num_aiops = sInitController(ctlp, i, controller + (i * 0x400), aiopio, MAX_AIOPS_PER_BOARD, 0, FREQ_DIS, 0);
+
+ if (ctlp->boardType == ROCKET_TYPE_PC104) {
+ sEnAiop(ctlp, 2); /* only one AIOPIC, but these */
+ sEnAiop(ctlp, 3); /* CSels used for other stuff */
+ }
+
+ /* If something went wrong initing the AIOP's release the ISA IO memory */
+ if (num_aiops <= 0) {
+ release_region(rcktpt_io_addr[i], 64);
+ rcktpt_io_addr[i] = 0;
+ return (0);
+ }
+
+ rocketModel[i].startingPortNumber = nextLineNumber;
+
+ for (aiop = 0; aiop < num_aiops; aiop++) {
+ sResetAiopByNum(ctlp, aiop);
+ sEnAiop(ctlp, aiop);
+ num_chan = sGetAiopNumChan(ctlp, aiop);
+ total_num_chan += num_chan;
+ for (chan = 0; chan < num_chan; chan++)
+ init_r_port(i, aiop, chan, NULL);
+ }
+ is_PCI[i] = 0;
+ if ((rcktpt_type[i] == ROCKET_TYPE_MODEM) || (rcktpt_type[i] == ROCKET_TYPE_MODEMII)) {
+ num_chan = sGetAiopNumChan(ctlp, 0);
+ total_num_chan = num_chan;
+ for (chan = 0; chan < num_chan; chan++)
+ sModemReset(ctlp, chan, 1);
+ msleep(500);
+ for (chan = 0; chan < num_chan; chan++)
+ sModemReset(ctlp, chan, 0);
+ msleep(500);
+ strcpy(rocketModel[i].modelString, "RocketModem ISA");
+ } else {
+ strcpy(rocketModel[i].modelString, "RocketPort ISA");
+ }
+ rocketModel[i].numPorts = total_num_chan;
+ rocketModel[i].model = MODEL_ISA;
+
+ printk(KERN_INFO "RocketPort ISA card #%d found at 0x%lx - %d AIOPs %s\n",
+ i, rcktpt_io_addr[i], num_aiops, type_string);
+
+ printk(KERN_INFO "Installing %s, creating /dev/ttyR%d - %ld\n",
+ rocketModel[i].modelString,
+ rocketModel[i].startingPortNumber,
+ rocketModel[i].startingPortNumber +
+ rocketModel[i].numPorts - 1);
+
+ return (1);
+}
+
+static const struct tty_operations rocket_ops = {
+ .open = rp_open,
+ .close = rp_close,
+ .write = rp_write,
+ .put_char = rp_put_char,
+ .write_room = rp_write_room,
+ .chars_in_buffer = rp_chars_in_buffer,
+ .flush_buffer = rp_flush_buffer,
+ .ioctl = rp_ioctl,
+ .throttle = rp_throttle,
+ .unthrottle = rp_unthrottle,
+ .set_termios = rp_set_termios,
+ .stop = rp_stop,
+ .start = rp_start,
+ .hangup = rp_hangup,
+ .break_ctl = rp_break,
+ .send_xchar = rp_send_xchar,
+ .wait_until_sent = rp_wait_until_sent,
+ .tiocmget = rp_tiocmget,
+ .tiocmset = rp_tiocmset,
+};
+
+static const struct tty_port_operations rocket_port_ops = {
+ .carrier_raised = carrier_raised,
+ .dtr_rts = dtr_rts,
+};
+
+/*
+ * The module "startup" routine; it's run when the module is loaded.
+ */
+static int __init rp_init(void)
+{
+ int ret = -ENOMEM, pci_boards_found, isa_boards_found, i;
+
+ printk(KERN_INFO "RocketPort device driver module, version %s, %s\n",
+ ROCKET_VERSION, ROCKET_DATE);
+
+ rocket_driver = alloc_tty_driver(MAX_RP_PORTS);
+ if (!rocket_driver)
+ goto err;
+
+ /*
+ * If board 1 is non-zero, there is at least one ISA configured. If controller is
+ * zero, use the default controller IO address of board1 + 0x40.
+ */
+ if (board1) {
+ if (controller == 0)
+ controller = board1 + 0x40;
+ } else {
+ controller = 0; /* Used as a flag, meaning no ISA boards */
+ }
+
+ /* If an ISA card is configured, reserve the 4 byte IO space for the Mudbac controller */
+ if (controller && (!request_region(controller, 4, "Comtrol RocketPort"))) {
+ printk(KERN_ERR "Unable to reserve IO region for first "
+ "configured ISA RocketPort controller 0x%lx. "
+ "Driver exiting\n", controller);
+ ret = -EBUSY;
+ goto err_tty;
+ }
+
+ /* Store ISA variable retrieved from command line or .conf file. */
+ rcktpt_io_addr[0] = board1;
+ rcktpt_io_addr[1] = board2;
+ rcktpt_io_addr[2] = board3;
+ rcktpt_io_addr[3] = board4;
+
+ rcktpt_type[0] = modem1 ? ROCKET_TYPE_MODEM : ROCKET_TYPE_NORMAL;
+ rcktpt_type[0] = pc104_1[0] ? ROCKET_TYPE_PC104 : rcktpt_type[0];
+ rcktpt_type[1] = modem2 ? ROCKET_TYPE_MODEM : ROCKET_TYPE_NORMAL;
+ rcktpt_type[1] = pc104_2[0] ? ROCKET_TYPE_PC104 : rcktpt_type[1];
+ rcktpt_type[2] = modem3 ? ROCKET_TYPE_MODEM : ROCKET_TYPE_NORMAL;
+ rcktpt_type[2] = pc104_3[0] ? ROCKET_TYPE_PC104 : rcktpt_type[2];
+ rcktpt_type[3] = modem4 ? ROCKET_TYPE_MODEM : ROCKET_TYPE_NORMAL;
+ rcktpt_type[3] = pc104_4[0] ? ROCKET_TYPE_PC104 : rcktpt_type[3];
+
+ /*
+ * Set up the tty driver structure and then register this
+ * driver with the tty layer.
+ */
+
+ rocket_driver->owner = THIS_MODULE;
+ rocket_driver->flags = TTY_DRIVER_DYNAMIC_DEV;
+ rocket_driver->name = "ttyR";
+ rocket_driver->driver_name = "Comtrol RocketPort";
+ rocket_driver->major = TTY_ROCKET_MAJOR;
+ rocket_driver->minor_start = 0;
+ rocket_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ rocket_driver->subtype = SERIAL_TYPE_NORMAL;
+ rocket_driver->init_termios = tty_std_termios;
+ rocket_driver->init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ rocket_driver->init_termios.c_ispeed = 9600;
+ rocket_driver->init_termios.c_ospeed = 9600;
+#ifdef ROCKET_SOFT_FLOW
+ rocket_driver->flags |= TTY_DRIVER_REAL_RAW;
+#endif
+ tty_set_operations(rocket_driver, &rocket_ops);
+
+ ret = tty_register_driver(rocket_driver);
+ if (ret < 0) {
+ printk(KERN_ERR "Couldn't install tty RocketPort driver\n");
+ goto err_controller;
+ }
+
+#ifdef ROCKET_DEBUG_OPEN
+ printk(KERN_INFO "RocketPort driver is major %d\n", rocket_driver.major);
+#endif
+
+ /*
+ * OK, let's probe each of the controllers looking for boards. Any boards found
+ * will be initialized here.
+ */
+ isa_boards_found = 0;
+ pci_boards_found = 0;
+
+ for (i = 0; i < NUM_BOARDS; i++) {
+ if (init_ISA(i))
+ isa_boards_found++;
+ }
+
+#ifdef CONFIG_PCI
+ if (isa_boards_found < NUM_BOARDS)
+ pci_boards_found = init_PCI(isa_boards_found);
+#endif
+
+ max_board = pci_boards_found + isa_boards_found;
+
+ if (max_board == 0) {
+ printk(KERN_ERR "No rocketport ports found; unloading driver\n");
+ ret = -ENXIO;
+ goto err_ttyu;
+ }
+
+ return 0;
+err_ttyu:
+ tty_unregister_driver(rocket_driver);
+err_controller:
+ if (controller)
+ release_region(controller, 4);
+err_tty:
+ put_tty_driver(rocket_driver);
+err:
+ return ret;
+}
+
+
+static void rp_cleanup_module(void)
+{
+ int retval;
+ int i;
+
+ del_timer_sync(&rocket_timer);
+
+ retval = tty_unregister_driver(rocket_driver);
+ if (retval)
+ printk(KERN_ERR "Error %d while trying to unregister "
+ "rocketport driver\n", -retval);
+
+ for (i = 0; i < MAX_RP_PORTS; i++)
+ if (rp_table[i]) {
+ tty_unregister_device(rocket_driver, i);
+ kfree(rp_table[i]);
+ }
+
+ put_tty_driver(rocket_driver);
+
+ for (i = 0; i < NUM_BOARDS; i++) {
+ if (rcktpt_io_addr[i] <= 0 || is_PCI[i])
+ continue;
+ release_region(rcktpt_io_addr[i], 64);
+ }
+ if (controller)
+ release_region(controller, 4);
+}
+
+/***************************************************************************
+Function: sInitController
+Purpose: Initialization of controller global registers and controller
+ structure.
+Call: sInitController(CtlP,CtlNum,MudbacIO,AiopIOList,AiopIOListSize,
+ IRQNum,Frequency,PeriodicOnly)
+ CONTROLLER_T *CtlP; Ptr to controller structure
+ int CtlNum; Controller number
+ ByteIO_t MudbacIO; Mudbac base I/O address.
+ ByteIO_t *AiopIOList; List of I/O addresses for each AIOP.
+ This list must be in the order the AIOPs will be found on the
+ controller. Once an AIOP in the list is not found, it is
+ assumed that there are no more AIOPs on the controller.
+ int AiopIOListSize; Number of addresses in AiopIOList
+ int IRQNum; Interrupt Request number. Can be any of the following:
+ 0: Disable global interrupts
+ 3: IRQ 3
+ 4: IRQ 4
+ 5: IRQ 5
+ 9: IRQ 9
+ 10: IRQ 10
+ 11: IRQ 11
+ 12: IRQ 12
+ 15: IRQ 15
+ Byte_t Frequency: A flag identifying the frequency
+ of the periodic interrupt, can be any one of the following:
+ FREQ_DIS - periodic interrupt disabled
+ FREQ_137HZ - 137 Hertz
+ FREQ_69HZ - 69 Hertz
+ FREQ_34HZ - 34 Hertz
+ FREQ_17HZ - 17 Hertz
+ FREQ_9HZ - 9 Hertz
+ FREQ_4HZ - 4 Hertz
+ If IRQNum is set to 0 the Frequency parameter is
+ overidden, it is forced to a value of FREQ_DIS.
+ int PeriodicOnly: 1 if all interrupts except the periodic
+ interrupt are to be blocked.
+ 0 is both the periodic interrupt and
+ other channel interrupts are allowed.
+ If IRQNum is set to 0 the PeriodicOnly parameter is
+ overidden, it is forced to a value of 0.
+Return: int: Number of AIOPs on the controller, or CTLID_NULL if controller
+ initialization failed.
+
+Comments:
+ If periodic interrupts are to be disabled but AIOP interrupts
+ are allowed, set Frequency to FREQ_DIS and PeriodicOnly to 0.
+
+ If interrupts are to be completely disabled set IRQNum to 0.
+
+ Setting Frequency to FREQ_DIS and PeriodicOnly to 1 is an
+ invalid combination.
+
+ This function performs initialization of global interrupt modes,
+ but it does not actually enable global interrupts. To enable
+ and disable global interrupts use functions sEnGlobalInt() and
+ sDisGlobalInt(). Enabling of global interrupts is normally not
+ done until all other initializations are complete.
+
+ Even if interrupts are globally enabled, they must also be
+ individually enabled for each channel that is to generate
+ interrupts.
+
+Warnings: No range checking on any of the parameters is done.
+
+ No context switches are allowed while executing this function.
+
+ After this function all AIOPs on the controller are disabled,
+ they can be enabled with sEnAiop().
+*/
+static int sInitController(CONTROLLER_T * CtlP, int CtlNum, ByteIO_t MudbacIO,
+ ByteIO_t * AiopIOList, int AiopIOListSize,
+ int IRQNum, Byte_t Frequency, int PeriodicOnly)
+{
+ int i;
+ ByteIO_t io;
+ int done;
+
+ CtlP->AiopIntrBits = aiop_intr_bits;
+ CtlP->AltChanRingIndicator = 0;
+ CtlP->CtlNum = CtlNum;
+ CtlP->CtlID = CTLID_0001; /* controller release 1 */
+ CtlP->BusType = isISA;
+ CtlP->MBaseIO = MudbacIO;
+ CtlP->MReg1IO = MudbacIO + 1;
+ CtlP->MReg2IO = MudbacIO + 2;
+ CtlP->MReg3IO = MudbacIO + 3;
+#if 1
+ CtlP->MReg2 = 0; /* interrupt disable */
+ CtlP->MReg3 = 0; /* no periodic interrupts */
+#else
+ if (sIRQMap[IRQNum] == 0) { /* interrupts globally disabled */
+ CtlP->MReg2 = 0; /* interrupt disable */
+ CtlP->MReg3 = 0; /* no periodic interrupts */
+ } else {
+ CtlP->MReg2 = sIRQMap[IRQNum]; /* set IRQ number */
+ CtlP->MReg3 = Frequency; /* set frequency */
+ if (PeriodicOnly) { /* periodic interrupt only */
+ CtlP->MReg3 |= PERIODIC_ONLY;
+ }
+ }
+#endif
+ sOutB(CtlP->MReg2IO, CtlP->MReg2);
+ sOutB(CtlP->MReg3IO, CtlP->MReg3);
+ sControllerEOI(CtlP); /* clear EOI if warm init */
+ /* Init AIOPs */
+ CtlP->NumAiop = 0;
+ for (i = done = 0; i < AiopIOListSize; i++) {
+ io = AiopIOList[i];
+ CtlP->AiopIO[i] = (WordIO_t) io;
+ CtlP->AiopIntChanIO[i] = io + _INT_CHAN;
+ sOutB(CtlP->MReg2IO, CtlP->MReg2 | (i & 0x03)); /* AIOP index */
+ sOutB(MudbacIO, (Byte_t) (io >> 6)); /* set up AIOP I/O in MUDBAC */
+ if (done)
+ continue;
+ sEnAiop(CtlP, i); /* enable the AIOP */
+ CtlP->AiopID[i] = sReadAiopID(io); /* read AIOP ID */
+ if (CtlP->AiopID[i] == AIOPID_NULL) /* if AIOP does not exist */
+ done = 1; /* done looking for AIOPs */
+ else {
+ CtlP->AiopNumChan[i] = sReadAiopNumChan((WordIO_t) io); /* num channels in AIOP */
+ sOutW((WordIO_t) io + _INDX_ADDR, _CLK_PRE); /* clock prescaler */
+ sOutB(io + _INDX_DATA, sClockPrescale);
+ CtlP->NumAiop++; /* bump count of AIOPs */
+ }
+ sDisAiop(CtlP, i); /* disable AIOP */
+ }
+
+ if (CtlP->NumAiop == 0)
+ return (-1);
+ else
+ return (CtlP->NumAiop);
+}
+
+/***************************************************************************
+Function: sPCIInitController
+Purpose: Initialization of controller global registers and controller
+ structure.
+Call: sPCIInitController(CtlP,CtlNum,AiopIOList,AiopIOListSize,
+ IRQNum,Frequency,PeriodicOnly)
+ CONTROLLER_T *CtlP; Ptr to controller structure
+ int CtlNum; Controller number
+ ByteIO_t *AiopIOList; List of I/O addresses for each AIOP.
+ This list must be in the order the AIOPs will be found on the
+ controller. Once an AIOP in the list is not found, it is
+ assumed that there are no more AIOPs on the controller.
+ int AiopIOListSize; Number of addresses in AiopIOList
+ int IRQNum; Interrupt Request number. Can be any of the following:
+ 0: Disable global interrupts
+ 3: IRQ 3
+ 4: IRQ 4
+ 5: IRQ 5
+ 9: IRQ 9
+ 10: IRQ 10
+ 11: IRQ 11
+ 12: IRQ 12
+ 15: IRQ 15
+ Byte_t Frequency: A flag identifying the frequency
+ of the periodic interrupt, can be any one of the following:
+ FREQ_DIS - periodic interrupt disabled
+ FREQ_137HZ - 137 Hertz
+ FREQ_69HZ - 69 Hertz
+ FREQ_34HZ - 34 Hertz
+ FREQ_17HZ - 17 Hertz
+ FREQ_9HZ - 9 Hertz
+ FREQ_4HZ - 4 Hertz
+ If IRQNum is set to 0 the Frequency parameter is
+ overidden, it is forced to a value of FREQ_DIS.
+ int PeriodicOnly: 1 if all interrupts except the periodic
+ interrupt are to be blocked.
+ 0 is both the periodic interrupt and
+ other channel interrupts are allowed.
+ If IRQNum is set to 0 the PeriodicOnly parameter is
+ overidden, it is forced to a value of 0.
+Return: int: Number of AIOPs on the controller, or CTLID_NULL if controller
+ initialization failed.
+
+Comments:
+ If periodic interrupts are to be disabled but AIOP interrupts
+ are allowed, set Frequency to FREQ_DIS and PeriodicOnly to 0.
+
+ If interrupts are to be completely disabled set IRQNum to 0.
+
+ Setting Frequency to FREQ_DIS and PeriodicOnly to 1 is an
+ invalid combination.
+
+ This function performs initialization of global interrupt modes,
+ but it does not actually enable global interrupts. To enable
+ and disable global interrupts use functions sEnGlobalInt() and
+ sDisGlobalInt(). Enabling of global interrupts is normally not
+ done until all other initializations are complete.
+
+ Even if interrupts are globally enabled, they must also be
+ individually enabled for each channel that is to generate
+ interrupts.
+
+Warnings: No range checking on any of the parameters is done.
+
+ No context switches are allowed while executing this function.
+
+ After this function all AIOPs on the controller are disabled,
+ they can be enabled with sEnAiop().
+*/
+static int sPCIInitController(CONTROLLER_T * CtlP, int CtlNum,
+ ByteIO_t * AiopIOList, int AiopIOListSize,
+ WordIO_t ConfigIO, int IRQNum, Byte_t Frequency,
+ int PeriodicOnly, int altChanRingIndicator,
+ int UPCIRingInd)
+{
+ int i;
+ ByteIO_t io;
+
+ CtlP->AltChanRingIndicator = altChanRingIndicator;
+ CtlP->UPCIRingInd = UPCIRingInd;
+ CtlP->CtlNum = CtlNum;
+ CtlP->CtlID = CTLID_0001; /* controller release 1 */
+ CtlP->BusType = isPCI; /* controller release 1 */
+
+ if (ConfigIO) {
+ CtlP->isUPCI = 1;
+ CtlP->PCIIO = ConfigIO + _PCI_9030_INT_CTRL;
+ CtlP->PCIIO2 = ConfigIO + _PCI_9030_GPIO_CTRL;
+ CtlP->AiopIntrBits = upci_aiop_intr_bits;
+ } else {
+ CtlP->isUPCI = 0;
+ CtlP->PCIIO =
+ (WordIO_t) ((ByteIO_t) AiopIOList[0] + _PCI_INT_FUNC);
+ CtlP->AiopIntrBits = aiop_intr_bits;
+ }
+
+ sPCIControllerEOI(CtlP); /* clear EOI if warm init */
+ /* Init AIOPs */
+ CtlP->NumAiop = 0;
+ for (i = 0; i < AiopIOListSize; i++) {
+ io = AiopIOList[i];
+ CtlP->AiopIO[i] = (WordIO_t) io;
+ CtlP->AiopIntChanIO[i] = io + _INT_CHAN;
+
+ CtlP->AiopID[i] = sReadAiopID(io); /* read AIOP ID */
+ if (CtlP->AiopID[i] == AIOPID_NULL) /* if AIOP does not exist */
+ break; /* done looking for AIOPs */
+
+ CtlP->AiopNumChan[i] = sReadAiopNumChan((WordIO_t) io); /* num channels in AIOP */
+ sOutW((WordIO_t) io + _INDX_ADDR, _CLK_PRE); /* clock prescaler */
+ sOutB(io + _INDX_DATA, sClockPrescale);
+ CtlP->NumAiop++; /* bump count of AIOPs */
+ }
+
+ if (CtlP->NumAiop == 0)
+ return (-1);
+ else
+ return (CtlP->NumAiop);
+}
+
+/***************************************************************************
+Function: sReadAiopID
+Purpose: Read the AIOP idenfication number directly from an AIOP.
+Call: sReadAiopID(io)
+ ByteIO_t io: AIOP base I/O address
+Return: int: Flag AIOPID_XXXX if a valid AIOP is found, where X
+ is replace by an identifying number.
+ Flag AIOPID_NULL if no valid AIOP is found
+Warnings: No context switches are allowed while executing this function.
+
+*/
+static int sReadAiopID(ByteIO_t io)
+{
+ Byte_t AiopID; /* ID byte from AIOP */
+
+ sOutB(io + _CMD_REG, RESET_ALL); /* reset AIOP */
+ sOutB(io + _CMD_REG, 0x0);
+ AiopID = sInW(io + _CHN_STAT0) & 0x07;
+ if (AiopID == 0x06)
+ return (1);
+ else /* AIOP does not exist */
+ return (-1);
+}
+
+/***************************************************************************
+Function: sReadAiopNumChan
+Purpose: Read the number of channels available in an AIOP directly from
+ an AIOP.
+Call: sReadAiopNumChan(io)
+ WordIO_t io: AIOP base I/O address
+Return: int: The number of channels available
+Comments: The number of channels is determined by write/reads from identical
+ offsets within the SRAM address spaces for channels 0 and 4.
+ If the channel 4 space is mirrored to channel 0 it is a 4 channel
+ AIOP, otherwise it is an 8 channel.
+Warnings: No context switches are allowed while executing this function.
+*/
+static int sReadAiopNumChan(WordIO_t io)
+{
+ Word_t x;
+ static Byte_t R[4] = { 0x00, 0x00, 0x34, 0x12 };
+
+ /* write to chan 0 SRAM */
+ out32((DWordIO_t) io + _INDX_ADDR, R);
+ sOutW(io + _INDX_ADDR, 0); /* read from SRAM, chan 0 */
+ x = sInW(io + _INDX_DATA);
+ sOutW(io + _INDX_ADDR, 0x4000); /* read from SRAM, chan 4 */
+ if (x != sInW(io + _INDX_DATA)) /* if different must be 8 chan */
+ return (8);
+ else
+ return (4);
+}
+
+/***************************************************************************
+Function: sInitChan
+Purpose: Initialization of a channel and channel structure
+Call: sInitChan(CtlP,ChP,AiopNum,ChanNum)
+ CONTROLLER_T *CtlP; Ptr to controller structure
+ CHANNEL_T *ChP; Ptr to channel structure
+ int AiopNum; AIOP number within controller
+ int ChanNum; Channel number within AIOP
+Return: int: 1 if initialization succeeded, 0 if it fails because channel
+ number exceeds number of channels available in AIOP.
+Comments: This function must be called before a channel can be used.
+Warnings: No range checking on any of the parameters is done.
+
+ No context switches are allowed while executing this function.
+*/
+static int sInitChan(CONTROLLER_T * CtlP, CHANNEL_T * ChP, int AiopNum,
+ int ChanNum)
+{
+ int i;
+ WordIO_t AiopIO;
+ WordIO_t ChIOOff;
+ Byte_t *ChR;
+ Word_t ChOff;
+ static Byte_t R[4];
+ int brd9600;
+
+ if (ChanNum >= CtlP->AiopNumChan[AiopNum])
+ return 0; /* exceeds num chans in AIOP */
+
+ /* Channel, AIOP, and controller identifiers */
+ ChP->CtlP = CtlP;
+ ChP->ChanID = CtlP->AiopID[AiopNum];
+ ChP->AiopNum = AiopNum;
+ ChP->ChanNum = ChanNum;
+
+ /* Global direct addresses */
+ AiopIO = CtlP->AiopIO[AiopNum];
+ ChP->Cmd = (ByteIO_t) AiopIO + _CMD_REG;
+ ChP->IntChan = (ByteIO_t) AiopIO + _INT_CHAN;
+ ChP->IntMask = (ByteIO_t) AiopIO + _INT_MASK;
+ ChP->IndexAddr = (DWordIO_t) AiopIO + _INDX_ADDR;
+ ChP->IndexData = AiopIO + _INDX_DATA;
+
+ /* Channel direct addresses */
+ ChIOOff = AiopIO + ChP->ChanNum * 2;
+ ChP->TxRxData = ChIOOff + _TD0;
+ ChP->ChanStat = ChIOOff + _CHN_STAT0;
+ ChP->TxRxCount = ChIOOff + _FIFO_CNT0;
+ ChP->IntID = (ByteIO_t) AiopIO + ChP->ChanNum + _INT_ID0;
+
+ /* Initialize the channel from the RData array */
+ for (i = 0; i < RDATASIZE; i += 4) {
+ R[0] = RData[i];
+ R[1] = RData[i + 1] + 0x10 * ChanNum;
+ R[2] = RData[i + 2];
+ R[3] = RData[i + 3];
+ out32(ChP->IndexAddr, R);
+ }
+
+ ChR = ChP->R;
+ for (i = 0; i < RREGDATASIZE; i += 4) {
+ ChR[i] = RRegData[i];
+ ChR[i + 1] = RRegData[i + 1] + 0x10 * ChanNum;
+ ChR[i + 2] = RRegData[i + 2];
+ ChR[i + 3] = RRegData[i + 3];
+ }
+
+ /* Indexed registers */
+ ChOff = (Word_t) ChanNum *0x1000;
+
+ if (sClockPrescale == 0x14)
+ brd9600 = 47;
+ else
+ brd9600 = 23;
+
+ ChP->BaudDiv[0] = (Byte_t) (ChOff + _BAUD);
+ ChP->BaudDiv[1] = (Byte_t) ((ChOff + _BAUD) >> 8);
+ ChP->BaudDiv[2] = (Byte_t) brd9600;
+ ChP->BaudDiv[3] = (Byte_t) (brd9600 >> 8);
+ out32(ChP->IndexAddr, ChP->BaudDiv);
+
+ ChP->TxControl[0] = (Byte_t) (ChOff + _TX_CTRL);
+ ChP->TxControl[1] = (Byte_t) ((ChOff + _TX_CTRL) >> 8);
+ ChP->TxControl[2] = 0;
+ ChP->TxControl[3] = 0;
+ out32(ChP->IndexAddr, ChP->TxControl);
+
+ ChP->RxControl[0] = (Byte_t) (ChOff + _RX_CTRL);
+ ChP->RxControl[1] = (Byte_t) ((ChOff + _RX_CTRL) >> 8);
+ ChP->RxControl[2] = 0;
+ ChP->RxControl[3] = 0;
+ out32(ChP->IndexAddr, ChP->RxControl);
+
+ ChP->TxEnables[0] = (Byte_t) (ChOff + _TX_ENBLS);
+ ChP->TxEnables[1] = (Byte_t) ((ChOff + _TX_ENBLS) >> 8);
+ ChP->TxEnables[2] = 0;
+ ChP->TxEnables[3] = 0;
+ out32(ChP->IndexAddr, ChP->TxEnables);
+
+ ChP->TxCompare[0] = (Byte_t) (ChOff + _TXCMP1);
+ ChP->TxCompare[1] = (Byte_t) ((ChOff + _TXCMP1) >> 8);
+ ChP->TxCompare[2] = 0;
+ ChP->TxCompare[3] = 0;
+ out32(ChP->IndexAddr, ChP->TxCompare);
+
+ ChP->TxReplace1[0] = (Byte_t) (ChOff + _TXREP1B1);
+ ChP->TxReplace1[1] = (Byte_t) ((ChOff + _TXREP1B1) >> 8);
+ ChP->TxReplace1[2] = 0;
+ ChP->TxReplace1[3] = 0;
+ out32(ChP->IndexAddr, ChP->TxReplace1);
+
+ ChP->TxReplace2[0] = (Byte_t) (ChOff + _TXREP2);
+ ChP->TxReplace2[1] = (Byte_t) ((ChOff + _TXREP2) >> 8);
+ ChP->TxReplace2[2] = 0;
+ ChP->TxReplace2[3] = 0;
+ out32(ChP->IndexAddr, ChP->TxReplace2);
+
+ ChP->TxFIFOPtrs = ChOff + _TXF_OUTP;
+ ChP->TxFIFO = ChOff + _TX_FIFO;
+
+ sOutB(ChP->Cmd, (Byte_t) ChanNum | RESTXFCNT); /* apply reset Tx FIFO count */
+ sOutB(ChP->Cmd, (Byte_t) ChanNum); /* remove reset Tx FIFO count */
+ sOutW((WordIO_t) ChP->IndexAddr, ChP->TxFIFOPtrs); /* clear Tx in/out ptrs */
+ sOutW(ChP->IndexData, 0);
+ ChP->RxFIFOPtrs = ChOff + _RXF_OUTP;
+ ChP->RxFIFO = ChOff + _RX_FIFO;
+
+ sOutB(ChP->Cmd, (Byte_t) ChanNum | RESRXFCNT); /* apply reset Rx FIFO count */
+ sOutB(ChP->Cmd, (Byte_t) ChanNum); /* remove reset Rx FIFO count */
+ sOutW((WordIO_t) ChP->IndexAddr, ChP->RxFIFOPtrs); /* clear Rx out ptr */
+ sOutW(ChP->IndexData, 0);
+ sOutW((WordIO_t) ChP->IndexAddr, ChP->RxFIFOPtrs + 2); /* clear Rx in ptr */
+ sOutW(ChP->IndexData, 0);
+ ChP->TxPrioCnt = ChOff + _TXP_CNT;
+ sOutW((WordIO_t) ChP->IndexAddr, ChP->TxPrioCnt);
+ sOutB(ChP->IndexData, 0);
+ ChP->TxPrioPtr = ChOff + _TXP_PNTR;
+ sOutW((WordIO_t) ChP->IndexAddr, ChP->TxPrioPtr);
+ sOutB(ChP->IndexData, 0);
+ ChP->TxPrioBuf = ChOff + _TXP_BUF;
+ sEnRxProcessor(ChP); /* start the Rx processor */
+
+ return 1;
+}
+
+/***************************************************************************
+Function: sStopRxProcessor
+Purpose: Stop the receive processor from processing a channel.
+Call: sStopRxProcessor(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+
+Comments: The receive processor can be started again with sStartRxProcessor().
+ This function causes the receive processor to skip over the
+ stopped channel. It does not stop it from processing other channels.
+
+Warnings: No context switches are allowed while executing this function.
+
+ Do not leave the receive processor stopped for more than one
+ character time.
+
+ After calling this function a delay of 4 uS is required to ensure
+ that the receive processor is no longer processing this channel.
+*/
+static void sStopRxProcessor(CHANNEL_T * ChP)
+{
+ Byte_t R[4];
+
+ R[0] = ChP->R[0];
+ R[1] = ChP->R[1];
+ R[2] = 0x0a;
+ R[3] = ChP->R[3];
+ out32(ChP->IndexAddr, R);
+}
+
+/***************************************************************************
+Function: sFlushRxFIFO
+Purpose: Flush the Rx FIFO
+Call: sFlushRxFIFO(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Return: void
+Comments: To prevent data from being enqueued or dequeued in the Tx FIFO
+ while it is being flushed the receive processor is stopped
+ and the transmitter is disabled. After these operations a
+ 4 uS delay is done before clearing the pointers to allow
+ the receive processor to stop. These items are handled inside
+ this function.
+Warnings: No context switches are allowed while executing this function.
+*/
+static void sFlushRxFIFO(CHANNEL_T * ChP)
+{
+ int i;
+ Byte_t Ch; /* channel number within AIOP */
+ int RxFIFOEnabled; /* 1 if Rx FIFO enabled */
+
+ if (sGetRxCnt(ChP) == 0) /* Rx FIFO empty */
+ return; /* don't need to flush */
+
+ RxFIFOEnabled = 0;
+ if (ChP->R[0x32] == 0x08) { /* Rx FIFO is enabled */
+ RxFIFOEnabled = 1;
+ sDisRxFIFO(ChP); /* disable it */
+ for (i = 0; i < 2000 / 200; i++) /* delay 2 uS to allow proc to disable FIFO */
+ sInB(ChP->IntChan); /* depends on bus i/o timing */
+ }
+ sGetChanStatus(ChP); /* clear any pending Rx errors in chan stat */
+ Ch = (Byte_t) sGetChanNum(ChP);
+ sOutB(ChP->Cmd, Ch | RESRXFCNT); /* apply reset Rx FIFO count */
+ sOutB(ChP->Cmd, Ch); /* remove reset Rx FIFO count */
+ sOutW((WordIO_t) ChP->IndexAddr, ChP->RxFIFOPtrs); /* clear Rx out ptr */
+ sOutW(ChP->IndexData, 0);
+ sOutW((WordIO_t) ChP->IndexAddr, ChP->RxFIFOPtrs + 2); /* clear Rx in ptr */
+ sOutW(ChP->IndexData, 0);
+ if (RxFIFOEnabled)
+ sEnRxFIFO(ChP); /* enable Rx FIFO */
+}
+
+/***************************************************************************
+Function: sFlushTxFIFO
+Purpose: Flush the Tx FIFO
+Call: sFlushTxFIFO(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Return: void
+Comments: To prevent data from being enqueued or dequeued in the Tx FIFO
+ while it is being flushed the receive processor is stopped
+ and the transmitter is disabled. After these operations a
+ 4 uS delay is done before clearing the pointers to allow
+ the receive processor to stop. These items are handled inside
+ this function.
+Warnings: No context switches are allowed while executing this function.
+*/
+static void sFlushTxFIFO(CHANNEL_T * ChP)
+{
+ int i;
+ Byte_t Ch; /* channel number within AIOP */
+ int TxEnabled; /* 1 if transmitter enabled */
+
+ if (sGetTxCnt(ChP) == 0) /* Tx FIFO empty */
+ return; /* don't need to flush */
+
+ TxEnabled = 0;
+ if (ChP->TxControl[3] & TX_ENABLE) {
+ TxEnabled = 1;
+ sDisTransmit(ChP); /* disable transmitter */
+ }
+ sStopRxProcessor(ChP); /* stop Rx processor */
+ for (i = 0; i < 4000 / 200; i++) /* delay 4 uS to allow proc to stop */
+ sInB(ChP->IntChan); /* depends on bus i/o timing */
+ Ch = (Byte_t) sGetChanNum(ChP);
+ sOutB(ChP->Cmd, Ch | RESTXFCNT); /* apply reset Tx FIFO count */
+ sOutB(ChP->Cmd, Ch); /* remove reset Tx FIFO count */
+ sOutW((WordIO_t) ChP->IndexAddr, ChP->TxFIFOPtrs); /* clear Tx in/out ptrs */
+ sOutW(ChP->IndexData, 0);
+ if (TxEnabled)
+ sEnTransmit(ChP); /* enable transmitter */
+ sStartRxProcessor(ChP); /* restart Rx processor */
+}
+
+/***************************************************************************
+Function: sWriteTxPrioByte
+Purpose: Write a byte of priority transmit data to a channel
+Call: sWriteTxPrioByte(ChP,Data)
+ CHANNEL_T *ChP; Ptr to channel structure
+ Byte_t Data; The transmit data byte
+
+Return: int: 1 if the bytes is successfully written, otherwise 0.
+
+Comments: The priority byte is transmitted before any data in the Tx FIFO.
+
+Warnings: No context switches are allowed while executing this function.
+*/
+static int sWriteTxPrioByte(CHANNEL_T * ChP, Byte_t Data)
+{
+ Byte_t DWBuf[4]; /* buffer for double word writes */
+ Word_t *WordPtr; /* must be far because Win SS != DS */
+ register DWordIO_t IndexAddr;
+
+ if (sGetTxCnt(ChP) > 1) { /* write it to Tx priority buffer */
+ IndexAddr = ChP->IndexAddr;
+ sOutW((WordIO_t) IndexAddr, ChP->TxPrioCnt); /* get priority buffer status */
+ if (sInB((ByteIO_t) ChP->IndexData) & PRI_PEND) /* priority buffer busy */
+ return (0); /* nothing sent */
+
+ WordPtr = (Word_t *) (&DWBuf[0]);
+ *WordPtr = ChP->TxPrioBuf; /* data byte address */
+
+ DWBuf[2] = Data; /* data byte value */
+ out32(IndexAddr, DWBuf); /* write it out */
+
+ *WordPtr = ChP->TxPrioCnt; /* Tx priority count address */
+
+ DWBuf[2] = PRI_PEND + 1; /* indicate 1 byte pending */
+ DWBuf[3] = 0; /* priority buffer pointer */
+ out32(IndexAddr, DWBuf); /* write it out */
+ } else { /* write it to Tx FIFO */
+
+ sWriteTxByte(sGetTxRxDataIO(ChP), Data);
+ }
+ return (1); /* 1 byte sent */
+}
+
+/***************************************************************************
+Function: sEnInterrupts
+Purpose: Enable one or more interrupts for a channel
+Call: sEnInterrupts(ChP,Flags)
+ CHANNEL_T *ChP; Ptr to channel structure
+ Word_t Flags: Interrupt enable flags, can be any combination
+ of the following flags:
+ TXINT_EN: Interrupt on Tx FIFO empty
+ RXINT_EN: Interrupt on Rx FIFO at trigger level (see
+ sSetRxTrigger())
+ SRCINT_EN: Interrupt on SRC (Special Rx Condition)
+ MCINT_EN: Interrupt on modem input change
+ CHANINT_EN: Allow channel interrupt signal to the AIOP's
+ Interrupt Channel Register.
+Return: void
+Comments: If an interrupt enable flag is set in Flags, that interrupt will be
+ enabled. If an interrupt enable flag is not set in Flags, that
+ interrupt will not be changed. Interrupts can be disabled with
+ function sDisInterrupts().
+
+ This function sets the appropriate bit for the channel in the AIOP's
+ Interrupt Mask Register if the CHANINT_EN flag is set. This allows
+ this channel's bit to be set in the AIOP's Interrupt Channel Register.
+
+ Interrupts must also be globally enabled before channel interrupts
+ will be passed on to the host. This is done with function
+ sEnGlobalInt().
+
+ In some cases it may be desirable to disable interrupts globally but
+ enable channel interrupts. This would allow the global interrupt
+ status register to be used to determine which AIOPs need service.
+*/
+static void sEnInterrupts(CHANNEL_T * ChP, Word_t Flags)
+{
+ Byte_t Mask; /* Interrupt Mask Register */
+
+ ChP->RxControl[2] |=
+ ((Byte_t) Flags & (RXINT_EN | SRCINT_EN | MCINT_EN));
+
+ out32(ChP->IndexAddr, ChP->RxControl);
+
+ ChP->TxControl[2] |= ((Byte_t) Flags & TXINT_EN);
+
+ out32(ChP->IndexAddr, ChP->TxControl);
+
+ if (Flags & CHANINT_EN) {
+ Mask = sInB(ChP->IntMask) | sBitMapSetTbl[ChP->ChanNum];
+ sOutB(ChP->IntMask, Mask);
+ }
+}
+
+/***************************************************************************
+Function: sDisInterrupts
+Purpose: Disable one or more interrupts for a channel
+Call: sDisInterrupts(ChP,Flags)
+ CHANNEL_T *ChP; Ptr to channel structure
+ Word_t Flags: Interrupt flags, can be any combination
+ of the following flags:
+ TXINT_EN: Interrupt on Tx FIFO empty
+ RXINT_EN: Interrupt on Rx FIFO at trigger level (see
+ sSetRxTrigger())
+ SRCINT_EN: Interrupt on SRC (Special Rx Condition)
+ MCINT_EN: Interrupt on modem input change
+ CHANINT_EN: Disable channel interrupt signal to the
+ AIOP's Interrupt Channel Register.
+Return: void
+Comments: If an interrupt flag is set in Flags, that interrupt will be
+ disabled. If an interrupt flag is not set in Flags, that
+ interrupt will not be changed. Interrupts can be enabled with
+ function sEnInterrupts().
+
+ This function clears the appropriate bit for the channel in the AIOP's
+ Interrupt Mask Register if the CHANINT_EN flag is set. This blocks
+ this channel's bit from being set in the AIOP's Interrupt Channel
+ Register.
+*/
+static void sDisInterrupts(CHANNEL_T * ChP, Word_t Flags)
+{
+ Byte_t Mask; /* Interrupt Mask Register */
+
+ ChP->RxControl[2] &=
+ ~((Byte_t) Flags & (RXINT_EN | SRCINT_EN | MCINT_EN));
+ out32(ChP->IndexAddr, ChP->RxControl);
+ ChP->TxControl[2] &= ~((Byte_t) Flags & TXINT_EN);
+ out32(ChP->IndexAddr, ChP->TxControl);
+
+ if (Flags & CHANINT_EN) {
+ Mask = sInB(ChP->IntMask) & sBitMapClrTbl[ChP->ChanNum];
+ sOutB(ChP->IntMask, Mask);
+ }
+}
+
+static void sSetInterfaceMode(CHANNEL_T * ChP, Byte_t mode)
+{
+ sOutB(ChP->CtlP->AiopIO[2], (mode & 0x18) | ChP->ChanNum);
+}
+
+/*
+ * Not an official SSCI function, but how to reset RocketModems.
+ * ISA bus version
+ */
+static void sModemReset(CONTROLLER_T * CtlP, int chan, int on)
+{
+ ByteIO_t addr;
+ Byte_t val;
+
+ addr = CtlP->AiopIO[0] + 0x400;
+ val = sInB(CtlP->MReg3IO);
+ /* if AIOP[1] is not enabled, enable it */
+ if ((val & 2) == 0) {
+ val = sInB(CtlP->MReg2IO);
+ sOutB(CtlP->MReg2IO, (val & 0xfc) | (1 & 0x03));
+ sOutB(CtlP->MBaseIO, (unsigned char) (addr >> 6));
+ }
+
+ sEnAiop(CtlP, 1);
+ if (!on)
+ addr += 8;
+ sOutB(addr + chan, 0); /* apply or remove reset */
+ sDisAiop(CtlP, 1);
+}
+
+/*
+ * Not an official SSCI function, but how to reset RocketModems.
+ * PCI bus version
+ */
+static void sPCIModemReset(CONTROLLER_T * CtlP, int chan, int on)
+{
+ ByteIO_t addr;
+
+ addr = CtlP->AiopIO[0] + 0x40; /* 2nd AIOP */
+ if (!on)
+ addr += 8;
+ sOutB(addr + chan, 0); /* apply or remove reset */
+}
+
+/* Resets the speaker controller on RocketModem II and III devices */
+static void rmSpeakerReset(CONTROLLER_T * CtlP, unsigned long model)
+{
+ ByteIO_t addr;
+
+ /* RocketModem II speaker control is at the 8th port location of offset 0x40 */
+ if ((model == MODEL_RP4M) || (model == MODEL_RP6M)) {
+ addr = CtlP->AiopIO[0] + 0x4F;
+ sOutB(addr, 0);
+ }
+
+ /* RocketModem III speaker control is at the 1st port location of offset 0x80 */
+ if ((model == MODEL_UPCI_RM3_8PORT)
+ || (model == MODEL_UPCI_RM3_4PORT)) {
+ addr = CtlP->AiopIO[0] + 0x88;
+ sOutB(addr, 0);
+ }
+}
+
+/* Returns the line number given the controller (board), aiop and channel number */
+static unsigned char GetLineNumber(int ctrl, int aiop, int ch)
+{
+ return lineNumbers[(ctrl << 5) | (aiop << 3) | ch];
+}
+
+/*
+ * Stores the line number associated with a given controller (board), aiop
+ * and channel number.
+ * Returns: The line number assigned
+ */
+static unsigned char SetLineNumber(int ctrl, int aiop, int ch)
+{
+ lineNumbers[(ctrl << 5) | (aiop << 3) | ch] = nextLineNumber++;
+ return (nextLineNumber - 1);
+}
--- /dev/null
+/*
+ * rocket.h --- the exported interface of the rocket driver to its configuration program.
+ *
+ * Written by Theodore Ts'o, Copyright 1997.
+ * Copyright 1997 Comtrol Corporation.
+ *
+ */
+
+/* Model Information Struct */
+typedef struct {
+ unsigned long model;
+ char modelString[80];
+ unsigned long numPorts;
+ int loadrm2;
+ int startingPortNumber;
+} rocketModel_t;
+
+struct rocket_config {
+ int line;
+ int flags;
+ int closing_wait;
+ int close_delay;
+ int port;
+ int reserved[32];
+};
+
+struct rocket_ports {
+ int tty_major;
+ int callout_major;
+ rocketModel_t rocketModel[8];
+};
+
+struct rocket_version {
+ char rocket_version[32];
+ char rocket_date[32];
+ char reserved[64];
+};
+
+/*
+ * Rocketport flags
+ */
+/*#define ROCKET_CALLOUT_NOHUP 0x00000001 */
+#define ROCKET_FORCE_CD 0x00000002
+#define ROCKET_HUP_NOTIFY 0x00000004
+#define ROCKET_SPLIT_TERMIOS 0x00000008
+#define ROCKET_SPD_MASK 0x00000070
+#define ROCKET_SPD_HI 0x00000010 /* Use 56000 instead of 38400 bps */
+#define ROCKET_SPD_VHI 0x00000020 /* Use 115200 instead of 38400 bps */
+#define ROCKET_SPD_SHI 0x00000030 /* Use 230400 instead of 38400 bps */
+#define ROCKET_SPD_WARP 0x00000040 /* Use 460800 instead of 38400 bps */
+#define ROCKET_SAK 0x00000080
+#define ROCKET_SESSION_LOCKOUT 0x00000100
+#define ROCKET_PGRP_LOCKOUT 0x00000200
+#define ROCKET_RTS_TOGGLE 0x00000400
+#define ROCKET_MODE_MASK 0x00003000
+#define ROCKET_MODE_RS232 0x00000000
+#define ROCKET_MODE_RS485 0x00001000
+#define ROCKET_MODE_RS422 0x00002000
+#define ROCKET_FLAGS 0x00003FFF
+
+#define ROCKET_USR_MASK 0x0071 /* Legal flags that non-privileged
+ * users can set or reset */
+
+/*
+ * For closing_wait and closing_wait2
+ */
+#define ROCKET_CLOSING_WAIT_NONE ASYNC_CLOSING_WAIT_NONE
+#define ROCKET_CLOSING_WAIT_INF ASYNC_CLOSING_WAIT_INF
+
+/*
+ * Rocketport ioctls -- "RP"
+ */
+#define RCKP_GET_STRUCT 0x00525001
+#define RCKP_GET_CONFIG 0x00525002
+#define RCKP_SET_CONFIG 0x00525003
+#define RCKP_GET_PORTS 0x00525004
+#define RCKP_RESET_RM2 0x00525005
+#define RCKP_GET_VERSION 0x00525006
+
+/* Rocketport Models */
+#define MODEL_RP32INTF 0x0001 /* RP 32 port w/external I/F */
+#define MODEL_RP8INTF 0x0002 /* RP 8 port w/external I/F */
+#define MODEL_RP16INTF 0x0003 /* RP 16 port w/external I/F */
+#define MODEL_RP8OCTA 0x0005 /* RP 8 port w/octa cable */
+#define MODEL_RP4QUAD 0x0004 /* RP 4 port w/quad cable */
+#define MODEL_RP8J 0x0006 /* RP 8 port w/RJ11 connectors */
+#define MODEL_RP4J 0x0007 /* RP 4 port w/RJ45 connectors */
+#define MODEL_RP8SNI 0x0008 /* RP 8 port w/ DB78 SNI connector */
+#define MODEL_RP16SNI 0x0009 /* RP 16 port w/ DB78 SNI connector */
+#define MODEL_RPP4 0x000A /* RP Plus 4 port */
+#define MODEL_RPP8 0x000B /* RP Plus 8 port */
+#define MODEL_RP2_232 0x000E /* RP Plus 2 port RS232 */
+#define MODEL_RP2_422 0x000F /* RP Plus 2 port RS232 */
+
+/* Rocketmodem II Models */
+#define MODEL_RP6M 0x000C /* RM 6 port */
+#define MODEL_RP4M 0x000D /* RM 4 port */
+
+/* Universal PCI boards */
+#define MODEL_UPCI_RP32INTF 0x0801 /* RP UPCI 32 port w/external I/F */
+#define MODEL_UPCI_RP8INTF 0x0802 /* RP UPCI 8 port w/external I/F */
+#define MODEL_UPCI_RP16INTF 0x0803 /* RP UPCI 16 port w/external I/F */
+#define MODEL_UPCI_RP8OCTA 0x0805 /* RP UPCI 8 port w/octa cable */
+#define MODEL_UPCI_RM3_8PORT 0x080C /* RP UPCI Rocketmodem III 8 port */
+#define MODEL_UPCI_RM3_4PORT 0x080C /* RP UPCI Rocketmodem III 4 port */
+
+/* Compact PCI 16 port */
+#define MODEL_CPCI_RP16INTF 0x0903 /* RP Compact PCI 16 port w/external I/F */
+
+/* All ISA boards */
+#define MODEL_ISA 0x1000
--- /dev/null
+/*
+ * rocket_int.h --- internal header file for rocket.c
+ *
+ * Written by Theodore Ts'o, Copyright 1997.
+ * Copyright 1997 Comtrol Corporation.
+ *
+ */
+
+/*
+ * Definition of the types in rcktpt_type
+ */
+#define ROCKET_TYPE_NORMAL 0
+#define ROCKET_TYPE_MODEM 1
+#define ROCKET_TYPE_MODEMII 2
+#define ROCKET_TYPE_MODEMIII 3
+#define ROCKET_TYPE_PC104 4
+
+#include <linux/mutex.h>
+
+#include <asm/io.h>
+#include <asm/byteorder.h>
+
+typedef unsigned char Byte_t;
+typedef unsigned int ByteIO_t;
+
+typedef unsigned int Word_t;
+typedef unsigned int WordIO_t;
+
+typedef unsigned int DWordIO_t;
+
+/*
+ * Note! Normally the Linux I/O macros already take care of
+ * byte-swapping the I/O instructions. However, all accesses using
+ * sOutDW aren't really 32-bit accesses, but should be handled in byte
+ * order. Hence the use of the cpu_to_le32() macro to byte-swap
+ * things to no-op the byte swapping done by the big-endian outl()
+ * instruction.
+ */
+
+static inline void sOutB(unsigned short port, unsigned char value)
+{
+#ifdef ROCKET_DEBUG_IO
+ printk(KERN_DEBUG "sOutB(%x, %x)...\n", port, value);
+#endif
+ outb_p(value, port);
+}
+
+static inline void sOutW(unsigned short port, unsigned short value)
+{
+#ifdef ROCKET_DEBUG_IO
+ printk(KERN_DEBUG "sOutW(%x, %x)...\n", port, value);
+#endif
+ outw_p(value, port);
+}
+
+static inline void out32(unsigned short port, Byte_t *p)
+{
+ u32 value = get_unaligned_le32(p);
+#ifdef ROCKET_DEBUG_IO
+ printk(KERN_DEBUG "out32(%x, %lx)...\n", port, value);
+#endif
+ outl_p(value, port);
+}
+
+static inline unsigned char sInB(unsigned short port)
+{
+ return inb_p(port);
+}
+
+static inline unsigned short sInW(unsigned short port)
+{
+ return inw_p(port);
+}
+
+/* This is used to move arrays of bytes so byte swapping isn't appropriate. */
+#define sOutStrW(port, addr, count) if (count) outsw(port, addr, count)
+#define sInStrW(port, addr, count) if (count) insw(port, addr, count)
+
+#define CTL_SIZE 8
+#define AIOP_CTL_SIZE 4
+#define CHAN_AIOP_SIZE 8
+#define MAX_PORTS_PER_AIOP 8
+#define MAX_AIOPS_PER_BOARD 4
+#define MAX_PORTS_PER_BOARD 32
+
+/* Bus type ID */
+#define isISA 0
+#define isPCI 1
+#define isMC 2
+
+/* Controller ID numbers */
+#define CTLID_NULL -1 /* no controller exists */
+#define CTLID_0001 0x0001 /* controller release 1 */
+
+/* AIOP ID numbers, identifies AIOP type implementing channel */
+#define AIOPID_NULL -1 /* no AIOP or channel exists */
+#define AIOPID_0001 0x0001 /* AIOP release 1 */
+
+/************************************************************************
+ Global Register Offsets - Direct Access - Fixed values
+************************************************************************/
+
+#define _CMD_REG 0x38 /* Command Register 8 Write */
+#define _INT_CHAN 0x39 /* Interrupt Channel Register 8 Read */
+#define _INT_MASK 0x3A /* Interrupt Mask Register 8 Read / Write */
+#define _UNUSED 0x3B /* Unused 8 */
+#define _INDX_ADDR 0x3C /* Index Register Address 16 Write */
+#define _INDX_DATA 0x3E /* Index Register Data 8/16 Read / Write */
+
+/************************************************************************
+ Channel Register Offsets for 1st channel in AIOP - Direct Access
+************************************************************************/
+#define _TD0 0x00 /* Transmit Data 16 Write */
+#define _RD0 0x00 /* Receive Data 16 Read */
+#define _CHN_STAT0 0x20 /* Channel Status 8/16 Read / Write */
+#define _FIFO_CNT0 0x10 /* Transmit/Receive FIFO Count 16 Read */
+#define _INT_ID0 0x30 /* Interrupt Identification 8 Read */
+
+/************************************************************************
+ Tx Control Register Offsets - Indexed - External - Fixed
+************************************************************************/
+#define _TX_ENBLS 0x980 /* Tx Processor Enables Register 8 Read / Write */
+#define _TXCMP1 0x988 /* Transmit Compare Value #1 8 Read / Write */
+#define _TXCMP2 0x989 /* Transmit Compare Value #2 8 Read / Write */
+#define _TXREP1B1 0x98A /* Tx Replace Value #1 - Byte 1 8 Read / Write */
+#define _TXREP1B2 0x98B /* Tx Replace Value #1 - Byte 2 8 Read / Write */
+#define _TXREP2 0x98C /* Transmit Replace Value #2 8 Read / Write */
+
+/************************************************************************
+Memory Controller Register Offsets - Indexed - External - Fixed
+************************************************************************/
+#define _RX_FIFO 0x000 /* Rx FIFO */
+#define _TX_FIFO 0x800 /* Tx FIFO */
+#define _RXF_OUTP 0x990 /* Rx FIFO OUT pointer 16 Read / Write */
+#define _RXF_INP 0x992 /* Rx FIFO IN pointer 16 Read / Write */
+#define _TXF_OUTP 0x994 /* Tx FIFO OUT pointer 8 Read / Write */
+#define _TXF_INP 0x995 /* Tx FIFO IN pointer 8 Read / Write */
+#define _TXP_CNT 0x996 /* Tx Priority Count 8 Read / Write */
+#define _TXP_PNTR 0x997 /* Tx Priority Pointer 8 Read / Write */
+
+#define PRI_PEND 0x80 /* Priority data pending (bit7, Tx pri cnt) */
+#define TXFIFO_SIZE 255 /* size of Tx FIFO */
+#define RXFIFO_SIZE 1023 /* size of Rx FIFO */
+
+/************************************************************************
+Tx Priority Buffer - Indexed - External - Fixed
+************************************************************************/
+#define _TXP_BUF 0x9C0 /* Tx Priority Buffer 32 Bytes Read / Write */
+#define TXP_SIZE 0x20 /* 32 bytes */
+
+/************************************************************************
+Channel Register Offsets - Indexed - Internal - Fixed
+************************************************************************/
+
+#define _TX_CTRL 0xFF0 /* Transmit Control 16 Write */
+#define _RX_CTRL 0xFF2 /* Receive Control 8 Write */
+#define _BAUD 0xFF4 /* Baud Rate 16 Write */
+#define _CLK_PRE 0xFF6 /* Clock Prescaler 8 Write */
+
+#define STMBREAK 0x08 /* BREAK */
+#define STMFRAME 0x04 /* framing error */
+#define STMRCVROVR 0x02 /* receiver over run error */
+#define STMPARITY 0x01 /* parity error */
+#define STMERROR (STMBREAK | STMFRAME | STMPARITY)
+#define STMBREAKH 0x800 /* BREAK */
+#define STMFRAMEH 0x400 /* framing error */
+#define STMRCVROVRH 0x200 /* receiver over run error */
+#define STMPARITYH 0x100 /* parity error */
+#define STMERRORH (STMBREAKH | STMFRAMEH | STMPARITYH)
+
+#define CTS_ACT 0x20 /* CTS input asserted */
+#define DSR_ACT 0x10 /* DSR input asserted */
+#define CD_ACT 0x08 /* CD input asserted */
+#define TXFIFOMT 0x04 /* Tx FIFO is empty */
+#define TXSHRMT 0x02 /* Tx shift register is empty */
+#define RDA 0x01 /* Rx data available */
+#define DRAINED (TXFIFOMT | TXSHRMT) /* indicates Tx is drained */
+
+#define STATMODE 0x8000 /* status mode enable bit */
+#define RXFOVERFL 0x2000 /* receive FIFO overflow */
+#define RX2MATCH 0x1000 /* receive compare byte 2 match */
+#define RX1MATCH 0x0800 /* receive compare byte 1 match */
+#define RXBREAK 0x0400 /* received BREAK */
+#define RXFRAME 0x0200 /* received framing error */
+#define RXPARITY 0x0100 /* received parity error */
+#define STATERROR (RXBREAK | RXFRAME | RXPARITY)
+
+#define CTSFC_EN 0x80 /* CTS flow control enable bit */
+#define RTSTOG_EN 0x40 /* RTS toggle enable bit */
+#define TXINT_EN 0x10 /* transmit interrupt enable */
+#define STOP2 0x08 /* enable 2 stop bits (0 = 1 stop) */
+#define PARITY_EN 0x04 /* enable parity (0 = no parity) */
+#define EVEN_PAR 0x02 /* even parity (0 = odd parity) */
+#define DATA8BIT 0x01 /* 8 bit data (0 = 7 bit data) */
+
+#define SETBREAK 0x10 /* send break condition (must clear) */
+#define LOCALLOOP 0x08 /* local loopback set for test */
+#define SET_DTR 0x04 /* assert DTR */
+#define SET_RTS 0x02 /* assert RTS */
+#define TX_ENABLE 0x01 /* enable transmitter */
+
+#define RTSFC_EN 0x40 /* RTS flow control enable */
+#define RXPROC_EN 0x20 /* receive processor enable */
+#define TRIG_NO 0x00 /* Rx FIFO trigger level 0 (no trigger) */
+#define TRIG_1 0x08 /* trigger level 1 char */
+#define TRIG_1_2 0x10 /* trigger level 1/2 */
+#define TRIG_7_8 0x18 /* trigger level 7/8 */
+#define TRIG_MASK 0x18 /* trigger level mask */
+#define SRCINT_EN 0x04 /* special Rx condition interrupt enable */
+#define RXINT_EN 0x02 /* Rx interrupt enable */
+#define MCINT_EN 0x01 /* modem change interrupt enable */
+
+#define RXF_TRIG 0x20 /* Rx FIFO trigger level interrupt */
+#define TXFIFO_MT 0x10 /* Tx FIFO empty interrupt */
+#define SRC_INT 0x08 /* special receive condition interrupt */
+#define DELTA_CD 0x04 /* CD change interrupt */
+#define DELTA_CTS 0x02 /* CTS change interrupt */
+#define DELTA_DSR 0x01 /* DSR change interrupt */
+
+#define REP1W2_EN 0x10 /* replace byte 1 with 2 bytes enable */
+#define IGN2_EN 0x08 /* ignore byte 2 enable */
+#define IGN1_EN 0x04 /* ignore byte 1 enable */
+#define COMP2_EN 0x02 /* compare byte 2 enable */
+#define COMP1_EN 0x01 /* compare byte 1 enable */
+
+#define RESET_ALL 0x80 /* reset AIOP (all channels) */
+#define TXOVERIDE 0x40 /* Transmit software off override */
+#define RESETUART 0x20 /* reset channel's UART */
+#define RESTXFCNT 0x10 /* reset channel's Tx FIFO count register */
+#define RESRXFCNT 0x08 /* reset channel's Rx FIFO count register */
+
+#define INTSTAT0 0x01 /* AIOP 0 interrupt status */
+#define INTSTAT1 0x02 /* AIOP 1 interrupt status */
+#define INTSTAT2 0x04 /* AIOP 2 interrupt status */
+#define INTSTAT3 0x08 /* AIOP 3 interrupt status */
+
+#define INTR_EN 0x08 /* allow interrupts to host */
+#define INT_STROB 0x04 /* strobe and clear interrupt line (EOI) */
+
+/**************************************************************************
+ MUDBAC remapped for PCI
+**************************************************************************/
+
+#define _CFG_INT_PCI 0x40
+#define _PCI_INT_FUNC 0x3A
+
+#define PCI_STROB 0x2000 /* bit 13 of int aiop register */
+#define INTR_EN_PCI 0x0010 /* allow interrupts to host */
+
+/*
+ * Definitions for Universal PCI board registers
+ */
+#define _PCI_9030_INT_CTRL 0x4c /* Offsets from BAR1 */
+#define _PCI_9030_GPIO_CTRL 0x54
+#define PCI_INT_CTRL_AIOP 0x0001
+#define PCI_GPIO_CTRL_8PORT 0x4000
+#define _PCI_9030_RING_IND 0xc0 /* Offsets from BAR1 */
+
+#define CHAN3_EN 0x08 /* enable AIOP 3 */
+#define CHAN2_EN 0x04 /* enable AIOP 2 */
+#define CHAN1_EN 0x02 /* enable AIOP 1 */
+#define CHAN0_EN 0x01 /* enable AIOP 0 */
+#define FREQ_DIS 0x00
+#define FREQ_274HZ 0x60
+#define FREQ_137HZ 0x50
+#define FREQ_69HZ 0x40
+#define FREQ_34HZ 0x30
+#define FREQ_17HZ 0x20
+#define FREQ_9HZ 0x10
+#define PERIODIC_ONLY 0x80 /* only PERIODIC interrupt */
+
+#define CHANINT_EN 0x0100 /* flags to enable/disable channel ints */
+
+#define RDATASIZE 72
+#define RREGDATASIZE 52
+
+/*
+ * AIOP interrupt bits for ISA/PCI boards and UPCI boards.
+ */
+#define AIOP_INTR_BIT_0 0x0001
+#define AIOP_INTR_BIT_1 0x0002
+#define AIOP_INTR_BIT_2 0x0004
+#define AIOP_INTR_BIT_3 0x0008
+
+#define AIOP_INTR_BITS ( \
+ AIOP_INTR_BIT_0 \
+ | AIOP_INTR_BIT_1 \
+ | AIOP_INTR_BIT_2 \
+ | AIOP_INTR_BIT_3)
+
+#define UPCI_AIOP_INTR_BIT_0 0x0004
+#define UPCI_AIOP_INTR_BIT_1 0x0020
+#define UPCI_AIOP_INTR_BIT_2 0x0100
+#define UPCI_AIOP_INTR_BIT_3 0x0800
+
+#define UPCI_AIOP_INTR_BITS ( \
+ UPCI_AIOP_INTR_BIT_0 \
+ | UPCI_AIOP_INTR_BIT_1 \
+ | UPCI_AIOP_INTR_BIT_2 \
+ | UPCI_AIOP_INTR_BIT_3)
+
+/* Controller level information structure */
+typedef struct {
+ int CtlID;
+ int CtlNum;
+ int BusType;
+ int boardType;
+ int isUPCI;
+ WordIO_t PCIIO;
+ WordIO_t PCIIO2;
+ ByteIO_t MBaseIO;
+ ByteIO_t MReg1IO;
+ ByteIO_t MReg2IO;
+ ByteIO_t MReg3IO;
+ Byte_t MReg2;
+ Byte_t MReg3;
+ int NumAiop;
+ int AltChanRingIndicator;
+ ByteIO_t UPCIRingInd;
+ WordIO_t AiopIO[AIOP_CTL_SIZE];
+ ByteIO_t AiopIntChanIO[AIOP_CTL_SIZE];
+ int AiopID[AIOP_CTL_SIZE];
+ int AiopNumChan[AIOP_CTL_SIZE];
+ Word_t *AiopIntrBits;
+} CONTROLLER_T;
+
+typedef CONTROLLER_T CONTROLLER_t;
+
+/* Channel level information structure */
+typedef struct {
+ CONTROLLER_T *CtlP;
+ int AiopNum;
+ int ChanID;
+ int ChanNum;
+ int rtsToggle;
+
+ ByteIO_t Cmd;
+ ByteIO_t IntChan;
+ ByteIO_t IntMask;
+ DWordIO_t IndexAddr;
+ WordIO_t IndexData;
+
+ WordIO_t TxRxData;
+ WordIO_t ChanStat;
+ WordIO_t TxRxCount;
+ ByteIO_t IntID;
+
+ Word_t TxFIFO;
+ Word_t TxFIFOPtrs;
+ Word_t RxFIFO;
+ Word_t RxFIFOPtrs;
+ Word_t TxPrioCnt;
+ Word_t TxPrioPtr;
+ Word_t TxPrioBuf;
+
+ Byte_t R[RREGDATASIZE];
+
+ Byte_t BaudDiv[4];
+ Byte_t TxControl[4];
+ Byte_t RxControl[4];
+ Byte_t TxEnables[4];
+ Byte_t TxCompare[4];
+ Byte_t TxReplace1[4];
+ Byte_t TxReplace2[4];
+} CHANNEL_T;
+
+typedef CHANNEL_T CHANNEL_t;
+typedef CHANNEL_T *CHANPTR_T;
+
+#define InterfaceModeRS232 0x00
+#define InterfaceModeRS422 0x08
+#define InterfaceModeRS485 0x10
+#define InterfaceModeRS232T 0x18
+
+/***************************************************************************
+Function: sClrBreak
+Purpose: Stop sending a transmit BREAK signal
+Call: sClrBreak(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sClrBreak(ChP) \
+do { \
+ (ChP)->TxControl[3] &= ~SETBREAK; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sClrDTR
+Purpose: Clr the DTR output
+Call: sClrDTR(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sClrDTR(ChP) \
+do { \
+ (ChP)->TxControl[3] &= ~SET_DTR; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sClrRTS
+Purpose: Clr the RTS output
+Call: sClrRTS(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sClrRTS(ChP) \
+do { \
+ if ((ChP)->rtsToggle) break; \
+ (ChP)->TxControl[3] &= ~SET_RTS; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sClrTxXOFF
+Purpose: Clear any existing transmit software flow control off condition
+Call: sClrTxXOFF(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sClrTxXOFF(ChP) \
+do { \
+ sOutB((ChP)->Cmd,TXOVERIDE | (Byte_t)(ChP)->ChanNum); \
+ sOutB((ChP)->Cmd,(Byte_t)(ChP)->ChanNum); \
+} while (0)
+
+/***************************************************************************
+Function: sCtlNumToCtlPtr
+Purpose: Convert a controller number to controller structure pointer
+Call: sCtlNumToCtlPtr(CtlNum)
+ int CtlNum; Controller number
+Return: CONTROLLER_T *: Ptr to controller structure
+*/
+#define sCtlNumToCtlPtr(CTLNUM) &sController[CTLNUM]
+
+/***************************************************************************
+Function: sControllerEOI
+Purpose: Strobe the MUDBAC's End Of Interrupt bit.
+Call: sControllerEOI(CtlP)
+ CONTROLLER_T *CtlP; Ptr to controller structure
+*/
+#define sControllerEOI(CTLP) sOutB((CTLP)->MReg2IO,(CTLP)->MReg2 | INT_STROB)
+
+/***************************************************************************
+Function: sPCIControllerEOI
+Purpose: Strobe the PCI End Of Interrupt bit.
+ For the UPCI boards, toggle the AIOP interrupt enable bit
+ (this was taken from the Windows driver).
+Call: sPCIControllerEOI(CtlP)
+ CONTROLLER_T *CtlP; Ptr to controller structure
+*/
+#define sPCIControllerEOI(CTLP) \
+do { \
+ if ((CTLP)->isUPCI) { \
+ Word_t w = sInW((CTLP)->PCIIO); \
+ sOutW((CTLP)->PCIIO, (w ^ PCI_INT_CTRL_AIOP)); \
+ sOutW((CTLP)->PCIIO, w); \
+ } \
+ else { \
+ sOutW((CTLP)->PCIIO, PCI_STROB); \
+ } \
+} while (0)
+
+/***************************************************************************
+Function: sDisAiop
+Purpose: Disable I/O access to an AIOP
+Call: sDisAiop(CltP)
+ CONTROLLER_T *CtlP; Ptr to controller structure
+ int AiopNum; Number of AIOP on controller
+*/
+#define sDisAiop(CTLP,AIOPNUM) \
+do { \
+ (CTLP)->MReg3 &= sBitMapClrTbl[AIOPNUM]; \
+ sOutB((CTLP)->MReg3IO,(CTLP)->MReg3); \
+} while (0)
+
+/***************************************************************************
+Function: sDisCTSFlowCtl
+Purpose: Disable output flow control using CTS
+Call: sDisCTSFlowCtl(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sDisCTSFlowCtl(ChP) \
+do { \
+ (ChP)->TxControl[2] &= ~CTSFC_EN; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sDisIXANY
+Purpose: Disable IXANY Software Flow Control
+Call: sDisIXANY(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sDisIXANY(ChP) \
+do { \
+ (ChP)->R[0x0e] = 0x86; \
+ out32((ChP)->IndexAddr,&(ChP)->R[0x0c]); \
+} while (0)
+
+/***************************************************************************
+Function: DisParity
+Purpose: Disable parity
+Call: sDisParity(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Comments: Function sSetParity() can be used in place of functions sEnParity(),
+ sDisParity(), sSetOddParity(), and sSetEvenParity().
+*/
+#define sDisParity(ChP) \
+do { \
+ (ChP)->TxControl[2] &= ~PARITY_EN; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sDisRTSToggle
+Purpose: Disable RTS toggle
+Call: sDisRTSToggle(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sDisRTSToggle(ChP) \
+do { \
+ (ChP)->TxControl[2] &= ~RTSTOG_EN; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+ (ChP)->rtsToggle = 0; \
+} while (0)
+
+/***************************************************************************
+Function: sDisRxFIFO
+Purpose: Disable Rx FIFO
+Call: sDisRxFIFO(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sDisRxFIFO(ChP) \
+do { \
+ (ChP)->R[0x32] = 0x0a; \
+ out32((ChP)->IndexAddr,&(ChP)->R[0x30]); \
+} while (0)
+
+/***************************************************************************
+Function: sDisRxStatusMode
+Purpose: Disable the Rx status mode
+Call: sDisRxStatusMode(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Comments: This takes the channel out of the receive status mode. All
+ subsequent reads of receive data using sReadRxWord() will return
+ two data bytes.
+*/
+#define sDisRxStatusMode(ChP) sOutW((ChP)->ChanStat,0)
+
+/***************************************************************************
+Function: sDisTransmit
+Purpose: Disable transmit
+Call: sDisTransmit(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+ This disables movement of Tx data from the Tx FIFO into the 1 byte
+ Tx buffer. Therefore there could be up to a 2 byte latency
+ between the time sDisTransmit() is called and the transmit buffer
+ and transmit shift register going completely empty.
+*/
+#define sDisTransmit(ChP) \
+do { \
+ (ChP)->TxControl[3] &= ~TX_ENABLE; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sDisTxSoftFlowCtl
+Purpose: Disable Tx Software Flow Control
+Call: sDisTxSoftFlowCtl(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sDisTxSoftFlowCtl(ChP) \
+do { \
+ (ChP)->R[0x06] = 0x8a; \
+ out32((ChP)->IndexAddr,&(ChP)->R[0x04]); \
+} while (0)
+
+/***************************************************************************
+Function: sEnAiop
+Purpose: Enable I/O access to an AIOP
+Call: sEnAiop(CltP)
+ CONTROLLER_T *CtlP; Ptr to controller structure
+ int AiopNum; Number of AIOP on controller
+*/
+#define sEnAiop(CTLP,AIOPNUM) \
+do { \
+ (CTLP)->MReg3 |= sBitMapSetTbl[AIOPNUM]; \
+ sOutB((CTLP)->MReg3IO,(CTLP)->MReg3); \
+} while (0)
+
+/***************************************************************************
+Function: sEnCTSFlowCtl
+Purpose: Enable output flow control using CTS
+Call: sEnCTSFlowCtl(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sEnCTSFlowCtl(ChP) \
+do { \
+ (ChP)->TxControl[2] |= CTSFC_EN; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sEnIXANY
+Purpose: Enable IXANY Software Flow Control
+Call: sEnIXANY(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sEnIXANY(ChP) \
+do { \
+ (ChP)->R[0x0e] = 0x21; \
+ out32((ChP)->IndexAddr,&(ChP)->R[0x0c]); \
+} while (0)
+
+/***************************************************************************
+Function: EnParity
+Purpose: Enable parity
+Call: sEnParity(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Comments: Function sSetParity() can be used in place of functions sEnParity(),
+ sDisParity(), sSetOddParity(), and sSetEvenParity().
+
+Warnings: Before enabling parity odd or even parity should be chosen using
+ functions sSetOddParity() or sSetEvenParity().
+*/
+#define sEnParity(ChP) \
+do { \
+ (ChP)->TxControl[2] |= PARITY_EN; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sEnRTSToggle
+Purpose: Enable RTS toggle
+Call: sEnRTSToggle(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Comments: This function will disable RTS flow control and clear the RTS
+ line to allow operation of RTS toggle.
+*/
+#define sEnRTSToggle(ChP) \
+do { \
+ (ChP)->RxControl[2] &= ~RTSFC_EN; \
+ out32((ChP)->IndexAddr,(ChP)->RxControl); \
+ (ChP)->TxControl[2] |= RTSTOG_EN; \
+ (ChP)->TxControl[3] &= ~SET_RTS; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+ (ChP)->rtsToggle = 1; \
+} while (0)
+
+/***************************************************************************
+Function: sEnRxFIFO
+Purpose: Enable Rx FIFO
+Call: sEnRxFIFO(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sEnRxFIFO(ChP) \
+do { \
+ (ChP)->R[0x32] = 0x08; \
+ out32((ChP)->IndexAddr,&(ChP)->R[0x30]); \
+} while (0)
+
+/***************************************************************************
+Function: sEnRxProcessor
+Purpose: Enable the receive processor
+Call: sEnRxProcessor(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Comments: This function is used to start the receive processor. When
+ the channel is in the reset state the receive processor is not
+ running. This is done to prevent the receive processor from
+ executing invalid microcode instructions prior to the
+ downloading of the microcode.
+
+Warnings: This function must be called after valid microcode has been
+ downloaded to the AIOP, and it must not be called before the
+ microcode has been downloaded.
+*/
+#define sEnRxProcessor(ChP) \
+do { \
+ (ChP)->RxControl[2] |= RXPROC_EN; \
+ out32((ChP)->IndexAddr,(ChP)->RxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sEnRxStatusMode
+Purpose: Enable the Rx status mode
+Call: sEnRxStatusMode(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Comments: This places the channel in the receive status mode. All subsequent
+ reads of receive data using sReadRxWord() will return a data byte
+ in the low word and a status byte in the high word.
+
+*/
+#define sEnRxStatusMode(ChP) sOutW((ChP)->ChanStat,STATMODE)
+
+/***************************************************************************
+Function: sEnTransmit
+Purpose: Enable transmit
+Call: sEnTransmit(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sEnTransmit(ChP) \
+do { \
+ (ChP)->TxControl[3] |= TX_ENABLE; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sEnTxSoftFlowCtl
+Purpose: Enable Tx Software Flow Control
+Call: sEnTxSoftFlowCtl(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sEnTxSoftFlowCtl(ChP) \
+do { \
+ (ChP)->R[0x06] = 0xc5; \
+ out32((ChP)->IndexAddr,&(ChP)->R[0x04]); \
+} while (0)
+
+/***************************************************************************
+Function: sGetAiopIntStatus
+Purpose: Get the AIOP interrupt status
+Call: sGetAiopIntStatus(CtlP,AiopNum)
+ CONTROLLER_T *CtlP; Ptr to controller structure
+ int AiopNum; AIOP number
+Return: Byte_t: The AIOP interrupt status. Bits 0 through 7
+ represent channels 0 through 7 respectively. If a
+ bit is set that channel is interrupting.
+*/
+#define sGetAiopIntStatus(CTLP,AIOPNUM) sInB((CTLP)->AiopIntChanIO[AIOPNUM])
+
+/***************************************************************************
+Function: sGetAiopNumChan
+Purpose: Get the number of channels supported by an AIOP
+Call: sGetAiopNumChan(CtlP,AiopNum)
+ CONTROLLER_T *CtlP; Ptr to controller structure
+ int AiopNum; AIOP number
+Return: int: The number of channels supported by the AIOP
+*/
+#define sGetAiopNumChan(CTLP,AIOPNUM) (CTLP)->AiopNumChan[AIOPNUM]
+
+/***************************************************************************
+Function: sGetChanIntID
+Purpose: Get a channel's interrupt identification byte
+Call: sGetChanIntID(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Return: Byte_t: The channel interrupt ID. Can be any
+ combination of the following flags:
+ RXF_TRIG: Rx FIFO trigger level interrupt
+ TXFIFO_MT: Tx FIFO empty interrupt
+ SRC_INT: Special receive condition interrupt
+ DELTA_CD: CD change interrupt
+ DELTA_CTS: CTS change interrupt
+ DELTA_DSR: DSR change interrupt
+*/
+#define sGetChanIntID(ChP) (sInB((ChP)->IntID) & (RXF_TRIG | TXFIFO_MT | SRC_INT | DELTA_CD | DELTA_CTS | DELTA_DSR))
+
+/***************************************************************************
+Function: sGetChanNum
+Purpose: Get the number of a channel within an AIOP
+Call: sGetChanNum(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Return: int: Channel number within AIOP, or NULLCHAN if channel does
+ not exist.
+*/
+#define sGetChanNum(ChP) (ChP)->ChanNum
+
+/***************************************************************************
+Function: sGetChanStatus
+Purpose: Get the channel status
+Call: sGetChanStatus(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Return: Word_t: The channel status. Can be any combination of
+ the following flags:
+ LOW BYTE FLAGS
+ CTS_ACT: CTS input asserted
+ DSR_ACT: DSR input asserted
+ CD_ACT: CD input asserted
+ TXFIFOMT: Tx FIFO is empty
+ TXSHRMT: Tx shift register is empty
+ RDA: Rx data available
+
+ HIGH BYTE FLAGS
+ STATMODE: status mode enable bit
+ RXFOVERFL: receive FIFO overflow
+ RX2MATCH: receive compare byte 2 match
+ RX1MATCH: receive compare byte 1 match
+ RXBREAK: received BREAK
+ RXFRAME: received framing error
+ RXPARITY: received parity error
+Warnings: This function will clear the high byte flags in the Channel
+ Status Register.
+*/
+#define sGetChanStatus(ChP) sInW((ChP)->ChanStat)
+
+/***************************************************************************
+Function: sGetChanStatusLo
+Purpose: Get the low byte only of the channel status
+Call: sGetChanStatusLo(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Return: Byte_t: The channel status low byte. Can be any combination
+ of the following flags:
+ CTS_ACT: CTS input asserted
+ DSR_ACT: DSR input asserted
+ CD_ACT: CD input asserted
+ TXFIFOMT: Tx FIFO is empty
+ TXSHRMT: Tx shift register is empty
+ RDA: Rx data available
+*/
+#define sGetChanStatusLo(ChP) sInB((ByteIO_t)(ChP)->ChanStat)
+
+/**********************************************************************
+ * Get RI status of channel
+ * Defined as a function in rocket.c -aes
+ */
+#if 0
+#define sGetChanRI(ChP) ((ChP)->CtlP->AltChanRingIndicator ? \
+ (sInB((ByteIO_t)((ChP)->ChanStat+8)) & DSR_ACT) : \
+ (((ChP)->CtlP->boardType == ROCKET_TYPE_PC104) ? \
+ (!(sInB((ChP)->CtlP->AiopIO[3]) & sBitMapSetTbl[(ChP)->ChanNum])) : \
+ 0))
+#endif
+
+/***************************************************************************
+Function: sGetControllerIntStatus
+Purpose: Get the controller interrupt status
+Call: sGetControllerIntStatus(CtlP)
+ CONTROLLER_T *CtlP; Ptr to controller structure
+Return: Byte_t: The controller interrupt status in the lower 4
+ bits. Bits 0 through 3 represent AIOP's 0
+ through 3 respectively. If a bit is set that
+ AIOP is interrupting. Bits 4 through 7 will
+ always be cleared.
+*/
+#define sGetControllerIntStatus(CTLP) (sInB((CTLP)->MReg1IO) & 0x0f)
+
+/***************************************************************************
+Function: sPCIGetControllerIntStatus
+Purpose: Get the controller interrupt status
+Call: sPCIGetControllerIntStatus(CtlP)
+ CONTROLLER_T *CtlP; Ptr to controller structure
+Return: unsigned char: The controller interrupt status in the lower 4
+ bits and bit 4. Bits 0 through 3 represent AIOP's 0
+ through 3 respectively. Bit 4 is set if the int
+ was generated from periodic. If a bit is set the
+ AIOP is interrupting.
+*/
+#define sPCIGetControllerIntStatus(CTLP) \
+ ((CTLP)->isUPCI ? \
+ (sInW((CTLP)->PCIIO2) & UPCI_AIOP_INTR_BITS) : \
+ ((sInW((CTLP)->PCIIO) >> 8) & AIOP_INTR_BITS))
+
+/***************************************************************************
+
+Function: sGetRxCnt
+Purpose: Get the number of data bytes in the Rx FIFO
+Call: sGetRxCnt(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Return: int: The number of data bytes in the Rx FIFO.
+Comments: Byte read of count register is required to obtain Rx count.
+
+*/
+#define sGetRxCnt(ChP) sInW((ChP)->TxRxCount)
+
+/***************************************************************************
+Function: sGetTxCnt
+Purpose: Get the number of data bytes in the Tx FIFO
+Call: sGetTxCnt(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Return: Byte_t: The number of data bytes in the Tx FIFO.
+Comments: Byte read of count register is required to obtain Tx count.
+
+*/
+#define sGetTxCnt(ChP) sInB((ByteIO_t)(ChP)->TxRxCount)
+
+/*****************************************************************************
+Function: sGetTxRxDataIO
+Purpose: Get the I/O address of a channel's TxRx Data register
+Call: sGetTxRxDataIO(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Return: WordIO_t: I/O address of a channel's TxRx Data register
+*/
+#define sGetTxRxDataIO(ChP) (ChP)->TxRxData
+
+/***************************************************************************
+Function: sInitChanDefaults
+Purpose: Initialize a channel structure to it's default state.
+Call: sInitChanDefaults(ChP)
+ CHANNEL_T *ChP; Ptr to the channel structure
+Comments: This function must be called once for every channel structure
+ that exists before any other SSCI calls can be made.
+
+*/
+#define sInitChanDefaults(ChP) \
+do { \
+ (ChP)->CtlP = NULLCTLPTR; \
+ (ChP)->AiopNum = NULLAIOP; \
+ (ChP)->ChanID = AIOPID_NULL; \
+ (ChP)->ChanNum = NULLCHAN; \
+} while (0)
+
+/***************************************************************************
+Function: sResetAiopByNum
+Purpose: Reset the AIOP by number
+Call: sResetAiopByNum(CTLP,AIOPNUM)
+ CONTROLLER_T CTLP; Ptr to controller structure
+ AIOPNUM; AIOP index
+*/
+#define sResetAiopByNum(CTLP,AIOPNUM) \
+do { \
+ sOutB((CTLP)->AiopIO[(AIOPNUM)]+_CMD_REG,RESET_ALL); \
+ sOutB((CTLP)->AiopIO[(AIOPNUM)]+_CMD_REG,0x0); \
+} while (0)
+
+/***************************************************************************
+Function: sSendBreak
+Purpose: Send a transmit BREAK signal
+Call: sSendBreak(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sSendBreak(ChP) \
+do { \
+ (ChP)->TxControl[3] |= SETBREAK; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sSetBaud
+Purpose: Set baud rate
+Call: sSetBaud(ChP,Divisor)
+ CHANNEL_T *ChP; Ptr to channel structure
+ Word_t Divisor; 16 bit baud rate divisor for channel
+*/
+#define sSetBaud(ChP,DIVISOR) \
+do { \
+ (ChP)->BaudDiv[2] = (Byte_t)(DIVISOR); \
+ (ChP)->BaudDiv[3] = (Byte_t)((DIVISOR) >> 8); \
+ out32((ChP)->IndexAddr,(ChP)->BaudDiv); \
+} while (0)
+
+/***************************************************************************
+Function: sSetData7
+Purpose: Set data bits to 7
+Call: sSetData7(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sSetData7(ChP) \
+do { \
+ (ChP)->TxControl[2] &= ~DATA8BIT; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sSetData8
+Purpose: Set data bits to 8
+Call: sSetData8(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sSetData8(ChP) \
+do { \
+ (ChP)->TxControl[2] |= DATA8BIT; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sSetDTR
+Purpose: Set the DTR output
+Call: sSetDTR(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sSetDTR(ChP) \
+do { \
+ (ChP)->TxControl[3] |= SET_DTR; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sSetEvenParity
+Purpose: Set even parity
+Call: sSetEvenParity(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Comments: Function sSetParity() can be used in place of functions sEnParity(),
+ sDisParity(), sSetOddParity(), and sSetEvenParity().
+
+Warnings: This function has no effect unless parity is enabled with function
+ sEnParity().
+*/
+#define sSetEvenParity(ChP) \
+do { \
+ (ChP)->TxControl[2] |= EVEN_PAR; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sSetOddParity
+Purpose: Set odd parity
+Call: sSetOddParity(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Comments: Function sSetParity() can be used in place of functions sEnParity(),
+ sDisParity(), sSetOddParity(), and sSetEvenParity().
+
+Warnings: This function has no effect unless parity is enabled with function
+ sEnParity().
+*/
+#define sSetOddParity(ChP) \
+do { \
+ (ChP)->TxControl[2] &= ~EVEN_PAR; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sSetRTS
+Purpose: Set the RTS output
+Call: sSetRTS(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sSetRTS(ChP) \
+do { \
+ if ((ChP)->rtsToggle) break; \
+ (ChP)->TxControl[3] |= SET_RTS; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sSetRxTrigger
+Purpose: Set the Rx FIFO trigger level
+Call: sSetRxProcessor(ChP,Level)
+ CHANNEL_T *ChP; Ptr to channel structure
+ Byte_t Level; Number of characters in Rx FIFO at which the
+ interrupt will be generated. Can be any of the following flags:
+
+ TRIG_NO: no trigger
+ TRIG_1: 1 character in FIFO
+ TRIG_1_2: FIFO 1/2 full
+ TRIG_7_8: FIFO 7/8 full
+Comments: An interrupt will be generated when the trigger level is reached
+ only if function sEnInterrupt() has been called with flag
+ RXINT_EN set. The RXF_TRIG flag in the Interrupt Idenfification
+ register will be set whenever the trigger level is reached
+ regardless of the setting of RXINT_EN.
+
+*/
+#define sSetRxTrigger(ChP,LEVEL) \
+do { \
+ (ChP)->RxControl[2] &= ~TRIG_MASK; \
+ (ChP)->RxControl[2] |= LEVEL; \
+ out32((ChP)->IndexAddr,(ChP)->RxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sSetStop1
+Purpose: Set stop bits to 1
+Call: sSetStop1(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sSetStop1(ChP) \
+do { \
+ (ChP)->TxControl[2] &= ~STOP2; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sSetStop2
+Purpose: Set stop bits to 2
+Call: sSetStop2(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+*/
+#define sSetStop2(ChP) \
+do { \
+ (ChP)->TxControl[2] |= STOP2; \
+ out32((ChP)->IndexAddr,(ChP)->TxControl); \
+} while (0)
+
+/***************************************************************************
+Function: sSetTxXOFFChar
+Purpose: Set the Tx XOFF flow control character
+Call: sSetTxXOFFChar(ChP,Ch)
+ CHANNEL_T *ChP; Ptr to channel structure
+ Byte_t Ch; The value to set the Tx XOFF character to
+*/
+#define sSetTxXOFFChar(ChP,CH) \
+do { \
+ (ChP)->R[0x07] = (CH); \
+ out32((ChP)->IndexAddr,&(ChP)->R[0x04]); \
+} while (0)
+
+/***************************************************************************
+Function: sSetTxXONChar
+Purpose: Set the Tx XON flow control character
+Call: sSetTxXONChar(ChP,Ch)
+ CHANNEL_T *ChP; Ptr to channel structure
+ Byte_t Ch; The value to set the Tx XON character to
+*/
+#define sSetTxXONChar(ChP,CH) \
+do { \
+ (ChP)->R[0x0b] = (CH); \
+ out32((ChP)->IndexAddr,&(ChP)->R[0x08]); \
+} while (0)
+
+/***************************************************************************
+Function: sStartRxProcessor
+Purpose: Start a channel's receive processor
+Call: sStartRxProcessor(ChP)
+ CHANNEL_T *ChP; Ptr to channel structure
+Comments: This function is used to start a Rx processor after it was
+ stopped with sStopRxProcessor() or sStopSWInFlowCtl(). It
+ will restart both the Rx processor and software input flow control.
+
+*/
+#define sStartRxProcessor(ChP) out32((ChP)->IndexAddr,&(ChP)->R[0])
+
+/***************************************************************************
+Function: sWriteTxByte
+Purpose: Write a transmit data byte to a channel.
+ ByteIO_t io: Channel transmit register I/O address. This can
+ be obtained with sGetTxRxDataIO().
+ Byte_t Data; The transmit data byte.
+Warnings: This function writes the data byte without checking to see if
+ sMaxTxSize is exceeded in the Tx FIFO.
+*/
+#define sWriteTxByte(IO,DATA) sOutB(IO,DATA)
+
+/*
+ * Begin Linux specific definitions for the Rocketport driver
+ *
+ * This code is Copyright Theodore Ts'o, 1995-1997
+ */
+
+struct r_port {
+ int magic;
+ struct tty_port port;
+ int line;
+ int flags; /* Don't yet match the ASY_ flags!! */
+ unsigned int board:3;
+ unsigned int aiop:2;
+ unsigned int chan:3;
+ CONTROLLER_t *ctlp;
+ CHANNEL_t channel;
+ int intmask;
+ int xmit_fifo_room; /* room in xmit fifo */
+ unsigned char *xmit_buf;
+ int xmit_head;
+ int xmit_tail;
+ int xmit_cnt;
+ int cd_status;
+ int ignore_status_mask;
+ int read_status_mask;
+ int cps;
+
+ struct completion close_wait; /* Not yet matching the core */
+ spinlock_t slock;
+ struct mutex write_mtx;
+};
+
+#define RPORT_MAGIC 0x525001
+
+#define NUM_BOARDS 8
+#define MAX_RP_PORTS (32*NUM_BOARDS)
+
+/*
+ * The size of the xmit buffer is 1 page, or 4096 bytes
+ */
+#define XMIT_BUF_SIZE 4096
+
+/* number of characters left in xmit buffer before we ask for more */
+#define WAKEUP_CHARS 256
+
+/*
+ * Assigned major numbers for the Comtrol Rocketport
+ */
+#define TTY_ROCKET_MAJOR 46
+#define CUA_ROCKET_MAJOR 47
+
+#ifdef PCI_VENDOR_ID_RP
+#undef PCI_VENDOR_ID_RP
+#undef PCI_DEVICE_ID_RP8OCTA
+#undef PCI_DEVICE_ID_RP8INTF
+#undef PCI_DEVICE_ID_RP16INTF
+#undef PCI_DEVICE_ID_RP32INTF
+#undef PCI_DEVICE_ID_URP8OCTA
+#undef PCI_DEVICE_ID_URP8INTF
+#undef PCI_DEVICE_ID_URP16INTF
+#undef PCI_DEVICE_ID_CRP16INTF
+#undef PCI_DEVICE_ID_URP32INTF
+#endif
+
+/* Comtrol PCI Vendor ID */
+#define PCI_VENDOR_ID_RP 0x11fe
+
+/* Comtrol Device ID's */
+#define PCI_DEVICE_ID_RP32INTF 0x0001 /* Rocketport 32 port w/external I/F */
+#define PCI_DEVICE_ID_RP8INTF 0x0002 /* Rocketport 8 port w/external I/F */
+#define PCI_DEVICE_ID_RP16INTF 0x0003 /* Rocketport 16 port w/external I/F */
+#define PCI_DEVICE_ID_RP4QUAD 0x0004 /* Rocketport 4 port w/quad cable */
+#define PCI_DEVICE_ID_RP8OCTA 0x0005 /* Rocketport 8 port w/octa cable */
+#define PCI_DEVICE_ID_RP8J 0x0006 /* Rocketport 8 port w/RJ11 connectors */
+#define PCI_DEVICE_ID_RP4J 0x0007 /* Rocketport 4 port w/RJ11 connectors */
+#define PCI_DEVICE_ID_RP8SNI 0x0008 /* Rocketport 8 port w/ DB78 SNI (Siemens) connector */
+#define PCI_DEVICE_ID_RP16SNI 0x0009 /* Rocketport 16 port w/ DB78 SNI (Siemens) connector */
+#define PCI_DEVICE_ID_RPP4 0x000A /* Rocketport Plus 4 port */
+#define PCI_DEVICE_ID_RPP8 0x000B /* Rocketport Plus 8 port */
+#define PCI_DEVICE_ID_RP6M 0x000C /* RocketModem 6 port */
+#define PCI_DEVICE_ID_RP4M 0x000D /* RocketModem 4 port */
+#define PCI_DEVICE_ID_RP2_232 0x000E /* Rocketport Plus 2 port RS232 */
+#define PCI_DEVICE_ID_RP2_422 0x000F /* Rocketport Plus 2 port RS422 */
+
+/* Universal PCI boards */
+#define PCI_DEVICE_ID_URP32INTF 0x0801 /* Rocketport UPCI 32 port w/external I/F */
+#define PCI_DEVICE_ID_URP8INTF 0x0802 /* Rocketport UPCI 8 port w/external I/F */
+#define PCI_DEVICE_ID_URP16INTF 0x0803 /* Rocketport UPCI 16 port w/external I/F */
+#define PCI_DEVICE_ID_URP8OCTA 0x0805 /* Rocketport UPCI 8 port w/octa cable */
+#define PCI_DEVICE_ID_UPCI_RM3_8PORT 0x080C /* Rocketmodem III 8 port */
+#define PCI_DEVICE_ID_UPCI_RM3_4PORT 0x080D /* Rocketmodem III 4 port */
+
+/* Compact PCI device */
+#define PCI_DEVICE_ID_CRP16INTF 0x0903 /* Rocketport Compact PCI 16 port w/external I/F */
+
--- /dev/null
+/*
+ * linux/drivers/char/synclink.c
+ *
+ * $Id: synclink.c,v 4.38 2005/11/07 16:30:34 paulkf Exp $
+ *
+ * Device driver for Microgate SyncLink ISA and PCI
+ * high speed multiprotocol serial adapters.
+ *
+ * written by Paul Fulghum for Microgate Corporation
+ * paulkf@microgate.com
+ *
+ * Microgate and SyncLink are trademarks of Microgate Corporation
+ *
+ * Derived from serial.c written by Theodore Ts'o and Linus Torvalds
+ *
+ * Original release 01/11/99
+ *
+ * This code is released under the GNU General Public License (GPL)
+ *
+ * This driver is primarily intended for use in synchronous
+ * HDLC mode. Asynchronous mode is also provided.
+ *
+ * When operating in synchronous mode, each call to mgsl_write()
+ * contains exactly one complete HDLC frame. Calling mgsl_put_char
+ * will start assembling an HDLC frame that will not be sent until
+ * mgsl_flush_chars or mgsl_write is called.
+ *
+ * Synchronous receive data is reported as complete frames. To accomplish
+ * this, the TTY flip buffer is bypassed (too small to hold largest
+ * frame and may fragment frames) and the line discipline
+ * receive entry point is called directly.
+ *
+ * This driver has been tested with a slightly modified ppp.c driver
+ * for synchronous PPP.
+ *
+ * 2000/02/16
+ * Added interface for syncppp.c driver (an alternate synchronous PPP
+ * implementation that also supports Cisco HDLC). Each device instance
+ * registers as a tty device AND a network device (if dosyncppp option
+ * is set for the device). The functionality is determined by which
+ * device interface is opened.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if defined(__i386__)
+# define BREAKPOINT() asm(" int $3");
+#else
+# define BREAKPOINT() { }
+#endif
+
+#define MAX_ISA_DEVICES 10
+#define MAX_PCI_DEVICES 10
+#define MAX_TOTAL_DEVICES 20
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
+#include <linux/init.h>
+#include <linux/ioctl.h>
+#include <linux/synclink.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/dma.h>
+#include <linux/bitops.h>
+#include <asm/types.h>
+#include <linux/termios.h>
+#include <linux/workqueue.h>
+#include <linux/hdlc.h>
+#include <linux/dma-mapping.h>
+
+#if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_MODULE))
+#define SYNCLINK_GENERIC_HDLC 1
+#else
+#define SYNCLINK_GENERIC_HDLC 0
+#endif
+
+#define GET_USER(error,value,addr) error = get_user(value,addr)
+#define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
+#define PUT_USER(error,value,addr) error = put_user(value,addr)
+#define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
+
+#include <asm/uaccess.h>
+
+#define RCLRVALUE 0xffff
+
+static MGSL_PARAMS default_params = {
+ MGSL_MODE_HDLC, /* unsigned long mode */
+ 0, /* unsigned char loopback; */
+ HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
+ HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
+ 0, /* unsigned long clock_speed; */
+ 0xff, /* unsigned char addr_filter; */
+ HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
+ HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
+ HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
+ 9600, /* unsigned long data_rate; */
+ 8, /* unsigned char data_bits; */
+ 1, /* unsigned char stop_bits; */
+ ASYNC_PARITY_NONE /* unsigned char parity; */
+};
+
+#define SHARED_MEM_ADDRESS_SIZE 0x40000
+#define BUFFERLISTSIZE 4096
+#define DMABUFFERSIZE 4096
+#define MAXRXFRAMES 7
+
+typedef struct _DMABUFFERENTRY
+{
+ u32 phys_addr; /* 32-bit flat physical address of data buffer */
+ volatile u16 count; /* buffer size/data count */
+ volatile u16 status; /* Control/status field */
+ volatile u16 rcc; /* character count field */
+ u16 reserved; /* padding required by 16C32 */
+ u32 link; /* 32-bit flat link to next buffer entry */
+ char *virt_addr; /* virtual address of data buffer */
+ u32 phys_entry; /* physical address of this buffer entry */
+ dma_addr_t dma_addr;
+} DMABUFFERENTRY, *DMAPBUFFERENTRY;
+
+/* The queue of BH actions to be performed */
+
+#define BH_RECEIVE 1
+#define BH_TRANSMIT 2
+#define BH_STATUS 4
+
+#define IO_PIN_SHUTDOWN_LIMIT 100
+
+struct _input_signal_events {
+ int ri_up;
+ int ri_down;
+ int dsr_up;
+ int dsr_down;
+ int dcd_up;
+ int dcd_down;
+ int cts_up;
+ int cts_down;
+};
+
+/* transmit holding buffer definitions*/
+#define MAX_TX_HOLDING_BUFFERS 5
+struct tx_holding_buffer {
+ int buffer_size;
+ unsigned char * buffer;
+};
+
+
+/*
+ * Device instance data structure
+ */
+
+struct mgsl_struct {
+ int magic;
+ struct tty_port port;
+ int line;
+ int hw_version;
+
+ struct mgsl_icount icount;
+
+ int timeout;
+ int x_char; /* xon/xoff character */
+ u16 read_status_mask;
+ u16 ignore_status_mask;
+ unsigned char *xmit_buf;
+ int xmit_head;
+ int xmit_tail;
+ int xmit_cnt;
+
+ wait_queue_head_t status_event_wait_q;
+ wait_queue_head_t event_wait_q;
+ struct timer_list tx_timer; /* HDLC transmit timeout timer */
+ struct mgsl_struct *next_device; /* device list link */
+
+ spinlock_t irq_spinlock; /* spinlock for synchronizing with ISR */
+ struct work_struct task; /* task structure for scheduling bh */
+
+ u32 EventMask; /* event trigger mask */
+ u32 RecordedEvents; /* pending events */
+
+ u32 max_frame_size; /* as set by device config */
+
+ u32 pending_bh;
+
+ bool bh_running; /* Protection from multiple */
+ int isr_overflow;
+ bool bh_requested;
+
+ int dcd_chkcount; /* check counts to prevent */
+ int cts_chkcount; /* too many IRQs if a signal */
+ int dsr_chkcount; /* is floating */
+ int ri_chkcount;
+
+ char *buffer_list; /* virtual address of Rx & Tx buffer lists */
+ u32 buffer_list_phys;
+ dma_addr_t buffer_list_dma_addr;
+
+ unsigned int rx_buffer_count; /* count of total allocated Rx buffers */
+ DMABUFFERENTRY *rx_buffer_list; /* list of receive buffer entries */
+ unsigned int current_rx_buffer;
+
+ int num_tx_dma_buffers; /* number of tx dma frames required */
+ int tx_dma_buffers_used;
+ unsigned int tx_buffer_count; /* count of total allocated Tx buffers */
+ DMABUFFERENTRY *tx_buffer_list; /* list of transmit buffer entries */
+ int start_tx_dma_buffer; /* tx dma buffer to start tx dma operation */
+ int current_tx_buffer; /* next tx dma buffer to be loaded */
+
+ unsigned char *intermediate_rxbuffer;
+
+ int num_tx_holding_buffers; /* number of tx holding buffer allocated */
+ int get_tx_holding_index; /* next tx holding buffer for adapter to load */
+ int put_tx_holding_index; /* next tx holding buffer to store user request */
+ int tx_holding_count; /* number of tx holding buffers waiting */
+ struct tx_holding_buffer tx_holding_buffers[MAX_TX_HOLDING_BUFFERS];
+
+ bool rx_enabled;
+ bool rx_overflow;
+ bool rx_rcc_underrun;
+
+ bool tx_enabled;
+ bool tx_active;
+ u32 idle_mode;
+
+ u16 cmr_value;
+ u16 tcsr_value;
+
+ char device_name[25]; /* device instance name */
+
+ unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */
+ unsigned char bus; /* expansion bus number (zero based) */
+ unsigned char function; /* PCI device number */
+
+ unsigned int io_base; /* base I/O address of adapter */
+ unsigned int io_addr_size; /* size of the I/O address range */
+ bool io_addr_requested; /* true if I/O address requested */
+
+ unsigned int irq_level; /* interrupt level */
+ unsigned long irq_flags;
+ bool irq_requested; /* true if IRQ requested */
+
+ unsigned int dma_level; /* DMA channel */
+ bool dma_requested; /* true if dma channel requested */
+
+ u16 mbre_bit;
+ u16 loopback_bits;
+ u16 usc_idle_mode;
+
+ MGSL_PARAMS params; /* communications parameters */
+
+ unsigned char serial_signals; /* current serial signal states */
+
+ bool irq_occurred; /* for diagnostics use */
+ unsigned int init_error; /* Initialization startup error (DIAGS) */
+ int fDiagnosticsmode; /* Driver in Diagnostic mode? (DIAGS) */
+
+ u32 last_mem_alloc;
+ unsigned char* memory_base; /* shared memory address (PCI only) */
+ u32 phys_memory_base;
+ bool shared_mem_requested;
+
+ unsigned char* lcr_base; /* local config registers (PCI only) */
+ u32 phys_lcr_base;
+ u32 lcr_offset;
+ bool lcr_mem_requested;
+
+ u32 misc_ctrl_value;
+ char flag_buf[MAX_ASYNC_BUFFER_SIZE];
+ char char_buf[MAX_ASYNC_BUFFER_SIZE];
+ bool drop_rts_on_tx_done;
+
+ bool loopmode_insert_requested;
+ bool loopmode_send_done_requested;
+
+ struct _input_signal_events input_signal_events;
+
+ /* generic HDLC device parts */
+ int netcount;
+ spinlock_t netlock;
+
+#if SYNCLINK_GENERIC_HDLC
+ struct net_device *netdev;
+#endif
+};
+
+#define MGSL_MAGIC 0x5401
+
+/*
+ * The size of the serial xmit buffer is 1 page, or 4096 bytes
+ */
+#ifndef SERIAL_XMIT_SIZE
+#define SERIAL_XMIT_SIZE 4096
+#endif
+
+/*
+ * These macros define the offsets used in calculating the
+ * I/O address of the specified USC registers.
+ */
+
+
+#define DCPIN 2 /* Bit 1 of I/O address */
+#define SDPIN 4 /* Bit 2 of I/O address */
+
+#define DCAR 0 /* DMA command/address register */
+#define CCAR SDPIN /* channel command/address register */
+#define DATAREG DCPIN + SDPIN /* serial data register */
+#define MSBONLY 0x41
+#define LSBONLY 0x40
+
+/*
+ * These macros define the register address (ordinal number)
+ * used for writing address/value pairs to the USC.
+ */
+
+#define CMR 0x02 /* Channel mode Register */
+#define CCSR 0x04 /* Channel Command/status Register */
+#define CCR 0x06 /* Channel Control Register */
+#define PSR 0x08 /* Port status Register */
+#define PCR 0x0a /* Port Control Register */
+#define TMDR 0x0c /* Test mode Data Register */
+#define TMCR 0x0e /* Test mode Control Register */
+#define CMCR 0x10 /* Clock mode Control Register */
+#define HCR 0x12 /* Hardware Configuration Register */
+#define IVR 0x14 /* Interrupt Vector Register */
+#define IOCR 0x16 /* Input/Output Control Register */
+#define ICR 0x18 /* Interrupt Control Register */
+#define DCCR 0x1a /* Daisy Chain Control Register */
+#define MISR 0x1c /* Misc Interrupt status Register */
+#define SICR 0x1e /* status Interrupt Control Register */
+#define RDR 0x20 /* Receive Data Register */
+#define RMR 0x22 /* Receive mode Register */
+#define RCSR 0x24 /* Receive Command/status Register */
+#define RICR 0x26 /* Receive Interrupt Control Register */
+#define RSR 0x28 /* Receive Sync Register */
+#define RCLR 0x2a /* Receive count Limit Register */
+#define RCCR 0x2c /* Receive Character count Register */
+#define TC0R 0x2e /* Time Constant 0 Register */
+#define TDR 0x30 /* Transmit Data Register */
+#define TMR 0x32 /* Transmit mode Register */
+#define TCSR 0x34 /* Transmit Command/status Register */
+#define TICR 0x36 /* Transmit Interrupt Control Register */
+#define TSR 0x38 /* Transmit Sync Register */
+#define TCLR 0x3a /* Transmit count Limit Register */
+#define TCCR 0x3c /* Transmit Character count Register */
+#define TC1R 0x3e /* Time Constant 1 Register */
+
+
+/*
+ * MACRO DEFINITIONS FOR DMA REGISTERS
+ */
+
+#define DCR 0x06 /* DMA Control Register (shared) */
+#define DACR 0x08 /* DMA Array count Register (shared) */
+#define BDCR 0x12 /* Burst/Dwell Control Register (shared) */
+#define DIVR 0x14 /* DMA Interrupt Vector Register (shared) */
+#define DICR 0x18 /* DMA Interrupt Control Register (shared) */
+#define CDIR 0x1a /* Clear DMA Interrupt Register (shared) */
+#define SDIR 0x1c /* Set DMA Interrupt Register (shared) */
+
+#define TDMR 0x02 /* Transmit DMA mode Register */
+#define TDIAR 0x1e /* Transmit DMA Interrupt Arm Register */
+#define TBCR 0x2a /* Transmit Byte count Register */
+#define TARL 0x2c /* Transmit Address Register (low) */
+#define TARU 0x2e /* Transmit Address Register (high) */
+#define NTBCR 0x3a /* Next Transmit Byte count Register */
+#define NTARL 0x3c /* Next Transmit Address Register (low) */
+#define NTARU 0x3e /* Next Transmit Address Register (high) */
+
+#define RDMR 0x82 /* Receive DMA mode Register (non-shared) */
+#define RDIAR 0x9e /* Receive DMA Interrupt Arm Register */
+#define RBCR 0xaa /* Receive Byte count Register */
+#define RARL 0xac /* Receive Address Register (low) */
+#define RARU 0xae /* Receive Address Register (high) */
+#define NRBCR 0xba /* Next Receive Byte count Register */
+#define NRARL 0xbc /* Next Receive Address Register (low) */
+#define NRARU 0xbe /* Next Receive Address Register (high) */
+
+
+/*
+ * MACRO DEFINITIONS FOR MODEM STATUS BITS
+ */
+
+#define MODEMSTATUS_DTR 0x80
+#define MODEMSTATUS_DSR 0x40
+#define MODEMSTATUS_RTS 0x20
+#define MODEMSTATUS_CTS 0x10
+#define MODEMSTATUS_RI 0x04
+#define MODEMSTATUS_DCD 0x01
+
+
+/*
+ * Channel Command/Address Register (CCAR) Command Codes
+ */
+
+#define RTCmd_Null 0x0000
+#define RTCmd_ResetHighestIus 0x1000
+#define RTCmd_TriggerChannelLoadDma 0x2000
+#define RTCmd_TriggerRxDma 0x2800
+#define RTCmd_TriggerTxDma 0x3000
+#define RTCmd_TriggerRxAndTxDma 0x3800
+#define RTCmd_PurgeRxFifo 0x4800
+#define RTCmd_PurgeTxFifo 0x5000
+#define RTCmd_PurgeRxAndTxFifo 0x5800
+#define RTCmd_LoadRcc 0x6800
+#define RTCmd_LoadTcc 0x7000
+#define RTCmd_LoadRccAndTcc 0x7800
+#define RTCmd_LoadTC0 0x8800
+#define RTCmd_LoadTC1 0x9000
+#define RTCmd_LoadTC0AndTC1 0x9800
+#define RTCmd_SerialDataLSBFirst 0xa000
+#define RTCmd_SerialDataMSBFirst 0xa800
+#define RTCmd_SelectBigEndian 0xb000
+#define RTCmd_SelectLittleEndian 0xb800
+
+
+/*
+ * DMA Command/Address Register (DCAR) Command Codes
+ */
+
+#define DmaCmd_Null 0x0000
+#define DmaCmd_ResetTxChannel 0x1000
+#define DmaCmd_ResetRxChannel 0x1200
+#define DmaCmd_StartTxChannel 0x2000
+#define DmaCmd_StartRxChannel 0x2200
+#define DmaCmd_ContinueTxChannel 0x3000
+#define DmaCmd_ContinueRxChannel 0x3200
+#define DmaCmd_PauseTxChannel 0x4000
+#define DmaCmd_PauseRxChannel 0x4200
+#define DmaCmd_AbortTxChannel 0x5000
+#define DmaCmd_AbortRxChannel 0x5200
+#define DmaCmd_InitTxChannel 0x7000
+#define DmaCmd_InitRxChannel 0x7200
+#define DmaCmd_ResetHighestDmaIus 0x8000
+#define DmaCmd_ResetAllChannels 0x9000
+#define DmaCmd_StartAllChannels 0xa000
+#define DmaCmd_ContinueAllChannels 0xb000
+#define DmaCmd_PauseAllChannels 0xc000
+#define DmaCmd_AbortAllChannels 0xd000
+#define DmaCmd_InitAllChannels 0xf000
+
+#define TCmd_Null 0x0000
+#define TCmd_ClearTxCRC 0x2000
+#define TCmd_SelectTicrTtsaData 0x4000
+#define TCmd_SelectTicrTxFifostatus 0x5000
+#define TCmd_SelectTicrIntLevel 0x6000
+#define TCmd_SelectTicrdma_level 0x7000
+#define TCmd_SendFrame 0x8000
+#define TCmd_SendAbort 0x9000
+#define TCmd_EnableDleInsertion 0xc000
+#define TCmd_DisableDleInsertion 0xd000
+#define TCmd_ClearEofEom 0xe000
+#define TCmd_SetEofEom 0xf000
+
+#define RCmd_Null 0x0000
+#define RCmd_ClearRxCRC 0x2000
+#define RCmd_EnterHuntmode 0x3000
+#define RCmd_SelectRicrRtsaData 0x4000
+#define RCmd_SelectRicrRxFifostatus 0x5000
+#define RCmd_SelectRicrIntLevel 0x6000
+#define RCmd_SelectRicrdma_level 0x7000
+
+/*
+ * Bits for enabling and disabling IRQs in Interrupt Control Register (ICR)
+ */
+
+#define RECEIVE_STATUS BIT5
+#define RECEIVE_DATA BIT4
+#define TRANSMIT_STATUS BIT3
+#define TRANSMIT_DATA BIT2
+#define IO_PIN BIT1
+#define MISC BIT0
+
+
+/*
+ * Receive status Bits in Receive Command/status Register RCSR
+ */
+
+#define RXSTATUS_SHORT_FRAME BIT8
+#define RXSTATUS_CODE_VIOLATION BIT8
+#define RXSTATUS_EXITED_HUNT BIT7
+#define RXSTATUS_IDLE_RECEIVED BIT6
+#define RXSTATUS_BREAK_RECEIVED BIT5
+#define RXSTATUS_ABORT_RECEIVED BIT5
+#define RXSTATUS_RXBOUND BIT4
+#define RXSTATUS_CRC_ERROR BIT3
+#define RXSTATUS_FRAMING_ERROR BIT3
+#define RXSTATUS_ABORT BIT2
+#define RXSTATUS_PARITY_ERROR BIT2
+#define RXSTATUS_OVERRUN BIT1
+#define RXSTATUS_DATA_AVAILABLE BIT0
+#define RXSTATUS_ALL 0x01f6
+#define usc_UnlatchRxstatusBits(a,b) usc_OutReg( (a), RCSR, (u16)((b) & RXSTATUS_ALL) )
+
+/*
+ * Values for setting transmit idle mode in
+ * Transmit Control/status Register (TCSR)
+ */
+#define IDLEMODE_FLAGS 0x0000
+#define IDLEMODE_ALT_ONE_ZERO 0x0100
+#define IDLEMODE_ZERO 0x0200
+#define IDLEMODE_ONE 0x0300
+#define IDLEMODE_ALT_MARK_SPACE 0x0500
+#define IDLEMODE_SPACE 0x0600
+#define IDLEMODE_MARK 0x0700
+#define IDLEMODE_MASK 0x0700
+
+/*
+ * IUSC revision identifiers
+ */
+#define IUSC_SL1660 0x4d44
+#define IUSC_PRE_SL1660 0x4553
+
+/*
+ * Transmit status Bits in Transmit Command/status Register (TCSR)
+ */
+
+#define TCSR_PRESERVE 0x0F00
+
+#define TCSR_UNDERWAIT BIT11
+#define TXSTATUS_PREAMBLE_SENT BIT7
+#define TXSTATUS_IDLE_SENT BIT6
+#define TXSTATUS_ABORT_SENT BIT5
+#define TXSTATUS_EOF_SENT BIT4
+#define TXSTATUS_EOM_SENT BIT4
+#define TXSTATUS_CRC_SENT BIT3
+#define TXSTATUS_ALL_SENT BIT2
+#define TXSTATUS_UNDERRUN BIT1
+#define TXSTATUS_FIFO_EMPTY BIT0
+#define TXSTATUS_ALL 0x00fa
+#define usc_UnlatchTxstatusBits(a,b) usc_OutReg( (a), TCSR, (u16)((a)->tcsr_value + ((b) & 0x00FF)) )
+
+
+#define MISCSTATUS_RXC_LATCHED BIT15
+#define MISCSTATUS_RXC BIT14
+#define MISCSTATUS_TXC_LATCHED BIT13
+#define MISCSTATUS_TXC BIT12
+#define MISCSTATUS_RI_LATCHED BIT11
+#define MISCSTATUS_RI BIT10
+#define MISCSTATUS_DSR_LATCHED BIT9
+#define MISCSTATUS_DSR BIT8
+#define MISCSTATUS_DCD_LATCHED BIT7
+#define MISCSTATUS_DCD BIT6
+#define MISCSTATUS_CTS_LATCHED BIT5
+#define MISCSTATUS_CTS BIT4
+#define MISCSTATUS_RCC_UNDERRUN BIT3
+#define MISCSTATUS_DPLL_NO_SYNC BIT2
+#define MISCSTATUS_BRG1_ZERO BIT1
+#define MISCSTATUS_BRG0_ZERO BIT0
+
+#define usc_UnlatchIostatusBits(a,b) usc_OutReg((a),MISR,(u16)((b) & 0xaaa0))
+#define usc_UnlatchMiscstatusBits(a,b) usc_OutReg((a),MISR,(u16)((b) & 0x000f))
+
+#define SICR_RXC_ACTIVE BIT15
+#define SICR_RXC_INACTIVE BIT14
+#define SICR_RXC (BIT15+BIT14)
+#define SICR_TXC_ACTIVE BIT13
+#define SICR_TXC_INACTIVE BIT12
+#define SICR_TXC (BIT13+BIT12)
+#define SICR_RI_ACTIVE BIT11
+#define SICR_RI_INACTIVE BIT10
+#define SICR_RI (BIT11+BIT10)
+#define SICR_DSR_ACTIVE BIT9
+#define SICR_DSR_INACTIVE BIT8
+#define SICR_DSR (BIT9+BIT8)
+#define SICR_DCD_ACTIVE BIT7
+#define SICR_DCD_INACTIVE BIT6
+#define SICR_DCD (BIT7+BIT6)
+#define SICR_CTS_ACTIVE BIT5
+#define SICR_CTS_INACTIVE BIT4
+#define SICR_CTS (BIT5+BIT4)
+#define SICR_RCC_UNDERFLOW BIT3
+#define SICR_DPLL_NO_SYNC BIT2
+#define SICR_BRG1_ZERO BIT1
+#define SICR_BRG0_ZERO BIT0
+
+void usc_DisableMasterIrqBit( struct mgsl_struct *info );
+void usc_EnableMasterIrqBit( struct mgsl_struct *info );
+void usc_EnableInterrupts( struct mgsl_struct *info, u16 IrqMask );
+void usc_DisableInterrupts( struct mgsl_struct *info, u16 IrqMask );
+void usc_ClearIrqPendingBits( struct mgsl_struct *info, u16 IrqMask );
+
+#define usc_EnableInterrupts( a, b ) \
+ usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0xff00) + 0xc0 + (b)) )
+
+#define usc_DisableInterrupts( a, b ) \
+ usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0xff00) + 0x80 + (b)) )
+
+#define usc_EnableMasterIrqBit(a) \
+ usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0x0f00) + 0xb000) )
+
+#define usc_DisableMasterIrqBit(a) \
+ usc_OutReg( (a), ICR, (u16)(usc_InReg((a),ICR) & 0x7f00) )
+
+#define usc_ClearIrqPendingBits( a, b ) usc_OutReg( (a), DCCR, 0x40 + (b) )
+
+/*
+ * Transmit status Bits in Transmit Control status Register (TCSR)
+ * and Transmit Interrupt Control Register (TICR) (except BIT2, BIT0)
+ */
+
+#define TXSTATUS_PREAMBLE_SENT BIT7
+#define TXSTATUS_IDLE_SENT BIT6
+#define TXSTATUS_ABORT_SENT BIT5
+#define TXSTATUS_EOF BIT4
+#define TXSTATUS_CRC_SENT BIT3
+#define TXSTATUS_ALL_SENT BIT2
+#define TXSTATUS_UNDERRUN BIT1
+#define TXSTATUS_FIFO_EMPTY BIT0
+
+#define DICR_MASTER BIT15
+#define DICR_TRANSMIT BIT0
+#define DICR_RECEIVE BIT1
+
+#define usc_EnableDmaInterrupts(a,b) \
+ usc_OutDmaReg( (a), DICR, (u16)(usc_InDmaReg((a),DICR) | (b)) )
+
+#define usc_DisableDmaInterrupts(a,b) \
+ usc_OutDmaReg( (a), DICR, (u16)(usc_InDmaReg((a),DICR) & ~(b)) )
+
+#define usc_EnableStatusIrqs(a,b) \
+ usc_OutReg( (a), SICR, (u16)(usc_InReg((a),SICR) | (b)) )
+
+#define usc_DisablestatusIrqs(a,b) \
+ usc_OutReg( (a), SICR, (u16)(usc_InReg((a),SICR) & ~(b)) )
+
+/* Transmit status Bits in Transmit Control status Register (TCSR) */
+/* and Transmit Interrupt Control Register (TICR) (except BIT2, BIT0) */
+
+
+#define DISABLE_UNCONDITIONAL 0
+#define DISABLE_END_OF_FRAME 1
+#define ENABLE_UNCONDITIONAL 2
+#define ENABLE_AUTO_CTS 3
+#define ENABLE_AUTO_DCD 3
+#define usc_EnableTransmitter(a,b) \
+ usc_OutReg( (a), TMR, (u16)((usc_InReg((a),TMR) & 0xfffc) | (b)) )
+#define usc_EnableReceiver(a,b) \
+ usc_OutReg( (a), RMR, (u16)((usc_InReg((a),RMR) & 0xfffc) | (b)) )
+
+static u16 usc_InDmaReg( struct mgsl_struct *info, u16 Port );
+static void usc_OutDmaReg( struct mgsl_struct *info, u16 Port, u16 Value );
+static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd );
+
+static u16 usc_InReg( struct mgsl_struct *info, u16 Port );
+static void usc_OutReg( struct mgsl_struct *info, u16 Port, u16 Value );
+static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd );
+void usc_RCmd( struct mgsl_struct *info, u16 Cmd );
+void usc_TCmd( struct mgsl_struct *info, u16 Cmd );
+
+#define usc_TCmd(a,b) usc_OutReg((a), TCSR, (u16)((a)->tcsr_value + (b)))
+#define usc_RCmd(a,b) usc_OutReg((a), RCSR, (b))
+
+#define usc_SetTransmitSyncChars(a,s0,s1) usc_OutReg((a), TSR, (u16)(((u16)s0<<8)|(u16)s1))
+
+static void usc_process_rxoverrun_sync( struct mgsl_struct *info );
+static void usc_start_receiver( struct mgsl_struct *info );
+static void usc_stop_receiver( struct mgsl_struct *info );
+
+static void usc_start_transmitter( struct mgsl_struct *info );
+static void usc_stop_transmitter( struct mgsl_struct *info );
+static void usc_set_txidle( struct mgsl_struct *info );
+static void usc_load_txfifo( struct mgsl_struct *info );
+
+static void usc_enable_aux_clock( struct mgsl_struct *info, u32 DataRate );
+static void usc_enable_loopback( struct mgsl_struct *info, int enable );
+
+static void usc_get_serial_signals( struct mgsl_struct *info );
+static void usc_set_serial_signals( struct mgsl_struct *info );
+
+static void usc_reset( struct mgsl_struct *info );
+
+static void usc_set_sync_mode( struct mgsl_struct *info );
+static void usc_set_sdlc_mode( struct mgsl_struct *info );
+static void usc_set_async_mode( struct mgsl_struct *info );
+static void usc_enable_async_clock( struct mgsl_struct *info, u32 DataRate );
+
+static void usc_loopback_frame( struct mgsl_struct *info );
+
+static void mgsl_tx_timeout(unsigned long context);
+
+
+static void usc_loopmode_cancel_transmit( struct mgsl_struct * info );
+static void usc_loopmode_insert_request( struct mgsl_struct * info );
+static int usc_loopmode_active( struct mgsl_struct * info);
+static void usc_loopmode_send_done( struct mgsl_struct * info );
+
+static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg);
+
+#if SYNCLINK_GENERIC_HDLC
+#define dev_to_port(D) (dev_to_hdlc(D)->priv)
+static void hdlcdev_tx_done(struct mgsl_struct *info);
+static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size);
+static int hdlcdev_init(struct mgsl_struct *info);
+static void hdlcdev_exit(struct mgsl_struct *info);
+#endif
+
+/*
+ * Defines a BUS descriptor value for the PCI adapter
+ * local bus address ranges.
+ */
+
+#define BUS_DESCRIPTOR( WrHold, WrDly, RdDly, Nwdd, Nwad, Nxda, Nrdd, Nrad ) \
+(0x00400020 + \
+((WrHold) << 30) + \
+((WrDly) << 28) + \
+((RdDly) << 26) + \
+((Nwdd) << 20) + \
+((Nwad) << 15) + \
+((Nxda) << 13) + \
+((Nrdd) << 11) + \
+((Nrad) << 6) )
+
+static void mgsl_trace_block(struct mgsl_struct *info,const char* data, int count, int xmit);
+
+/*
+ * Adapter diagnostic routines
+ */
+static bool mgsl_register_test( struct mgsl_struct *info );
+static bool mgsl_irq_test( struct mgsl_struct *info );
+static bool mgsl_dma_test( struct mgsl_struct *info );
+static bool mgsl_memory_test( struct mgsl_struct *info );
+static int mgsl_adapter_test( struct mgsl_struct *info );
+
+/*
+ * device and resource management routines
+ */
+static int mgsl_claim_resources(struct mgsl_struct *info);
+static void mgsl_release_resources(struct mgsl_struct *info);
+static void mgsl_add_device(struct mgsl_struct *info);
+static struct mgsl_struct* mgsl_allocate_device(void);
+
+/*
+ * DMA buffer manupulation functions.
+ */
+static void mgsl_free_rx_frame_buffers( struct mgsl_struct *info, unsigned int StartIndex, unsigned int EndIndex );
+static bool mgsl_get_rx_frame( struct mgsl_struct *info );
+static bool mgsl_get_raw_rx_frame( struct mgsl_struct *info );
+static void mgsl_reset_rx_dma_buffers( struct mgsl_struct *info );
+static void mgsl_reset_tx_dma_buffers( struct mgsl_struct *info );
+static int num_free_tx_dma_buffers(struct mgsl_struct *info);
+static void mgsl_load_tx_dma_buffer( struct mgsl_struct *info, const char *Buffer, unsigned int BufferSize);
+static void mgsl_load_pci_memory(char* TargetPtr, const char* SourcePtr, unsigned short count);
+
+/*
+ * DMA and Shared Memory buffer allocation and formatting
+ */
+static int mgsl_allocate_dma_buffers(struct mgsl_struct *info);
+static void mgsl_free_dma_buffers(struct mgsl_struct *info);
+static int mgsl_alloc_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList,int Buffercount);
+static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList,int Buffercount);
+static int mgsl_alloc_buffer_list_memory(struct mgsl_struct *info);
+static void mgsl_free_buffer_list_memory(struct mgsl_struct *info);
+static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info);
+static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info);
+static int mgsl_alloc_intermediate_txbuffer_memory(struct mgsl_struct *info);
+static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info);
+static bool load_next_tx_holding_buffer(struct mgsl_struct *info);
+static int save_tx_buffer_request(struct mgsl_struct *info,const char *Buffer, unsigned int BufferSize);
+
+/*
+ * Bottom half interrupt handlers
+ */
+static void mgsl_bh_handler(struct work_struct *work);
+static void mgsl_bh_receive(struct mgsl_struct *info);
+static void mgsl_bh_transmit(struct mgsl_struct *info);
+static void mgsl_bh_status(struct mgsl_struct *info);
+
+/*
+ * Interrupt handler routines and dispatch table.
+ */
+static void mgsl_isr_null( struct mgsl_struct *info );
+static void mgsl_isr_transmit_data( struct mgsl_struct *info );
+static void mgsl_isr_receive_data( struct mgsl_struct *info );
+static void mgsl_isr_receive_status( struct mgsl_struct *info );
+static void mgsl_isr_transmit_status( struct mgsl_struct *info );
+static void mgsl_isr_io_pin( struct mgsl_struct *info );
+static void mgsl_isr_misc( struct mgsl_struct *info );
+static void mgsl_isr_receive_dma( struct mgsl_struct *info );
+static void mgsl_isr_transmit_dma( struct mgsl_struct *info );
+
+typedef void (*isr_dispatch_func)(struct mgsl_struct *);
+
+static isr_dispatch_func UscIsrTable[7] =
+{
+ mgsl_isr_null,
+ mgsl_isr_misc,
+ mgsl_isr_io_pin,
+ mgsl_isr_transmit_data,
+ mgsl_isr_transmit_status,
+ mgsl_isr_receive_data,
+ mgsl_isr_receive_status
+};
+
+/*
+ * ioctl call handlers
+ */
+static int tiocmget(struct tty_struct *tty);
+static int tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear);
+static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount
+ __user *user_icount);
+static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_params);
+static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_params);
+static int mgsl_get_txidle(struct mgsl_struct * info, int __user *idle_mode);
+static int mgsl_set_txidle(struct mgsl_struct * info, int idle_mode);
+static int mgsl_txenable(struct mgsl_struct * info, int enable);
+static int mgsl_txabort(struct mgsl_struct * info);
+static int mgsl_rxenable(struct mgsl_struct * info, int enable);
+static int mgsl_wait_event(struct mgsl_struct * info, int __user *mask);
+static int mgsl_loopmode_send_done( struct mgsl_struct * info );
+
+/* set non-zero on successful registration with PCI subsystem */
+static bool pci_registered;
+
+/*
+ * Global linked list of SyncLink devices
+ */
+static struct mgsl_struct *mgsl_device_list;
+static int mgsl_device_count;
+
+/*
+ * Set this param to non-zero to load eax with the
+ * .text section address and breakpoint on module load.
+ * This is useful for use with gdb and add-symbol-file command.
+ */
+static int break_on_load;
+
+/*
+ * Driver major number, defaults to zero to get auto
+ * assigned major number. May be forced as module parameter.
+ */
+static int ttymajor;
+
+/*
+ * Array of user specified options for ISA adapters.
+ */
+static int io[MAX_ISA_DEVICES];
+static int irq[MAX_ISA_DEVICES];
+static int dma[MAX_ISA_DEVICES];
+static int debug_level;
+static int maxframe[MAX_TOTAL_DEVICES];
+static int txdmabufs[MAX_TOTAL_DEVICES];
+static int txholdbufs[MAX_TOTAL_DEVICES];
+
+module_param(break_on_load, bool, 0);
+module_param(ttymajor, int, 0);
+module_param_array(io, int, NULL, 0);
+module_param_array(irq, int, NULL, 0);
+module_param_array(dma, int, NULL, 0);
+module_param(debug_level, int, 0);
+module_param_array(maxframe, int, NULL, 0);
+module_param_array(txdmabufs, int, NULL, 0);
+module_param_array(txholdbufs, int, NULL, 0);
+
+static char *driver_name = "SyncLink serial driver";
+static char *driver_version = "$Revision: 4.38 $";
+
+static int synclink_init_one (struct pci_dev *dev,
+ const struct pci_device_id *ent);
+static void synclink_remove_one (struct pci_dev *dev);
+
+static struct pci_device_id synclink_pci_tbl[] = {
+ { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_USC, PCI_ANY_ID, PCI_ANY_ID, },
+ { PCI_VENDOR_ID_MICROGATE, 0x0210, PCI_ANY_ID, PCI_ANY_ID, },
+ { 0, }, /* terminate list */
+};
+MODULE_DEVICE_TABLE(pci, synclink_pci_tbl);
+
+MODULE_LICENSE("GPL");
+
+static struct pci_driver synclink_pci_driver = {
+ .name = "synclink",
+ .id_table = synclink_pci_tbl,
+ .probe = synclink_init_one,
+ .remove = __devexit_p(synclink_remove_one),
+};
+
+static struct tty_driver *serial_driver;
+
+/* number of characters left in xmit buffer before we ask for more */
+#define WAKEUP_CHARS 256
+
+
+static void mgsl_change_params(struct mgsl_struct *info);
+static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout);
+
+/*
+ * 1st function defined in .text section. Calling this function in
+ * init_module() followed by a breakpoint allows a remote debugger
+ * (gdb) to get the .text address for the add-symbol-file command.
+ * This allows remote debugging of dynamically loadable modules.
+ */
+static void* mgsl_get_text_ptr(void)
+{
+ return mgsl_get_text_ptr;
+}
+
+static inline int mgsl_paranoia_check(struct mgsl_struct *info,
+ char *name, const char *routine)
+{
+#ifdef MGSL_PARANOIA_CHECK
+ static const char *badmagic =
+ "Warning: bad magic number for mgsl struct (%s) in %s\n";
+ static const char *badinfo =
+ "Warning: null mgsl_struct for (%s) in %s\n";
+
+ if (!info) {
+ printk(badinfo, name, routine);
+ return 1;
+ }
+ if (info->magic != MGSL_MAGIC) {
+ printk(badmagic, name, routine);
+ return 1;
+ }
+#else
+ if (!info)
+ return 1;
+#endif
+ return 0;
+}
+
+/**
+ * line discipline callback wrappers
+ *
+ * The wrappers maintain line discipline references
+ * while calling into the line discipline.
+ *
+ * ldisc_receive_buf - pass receive data to line discipline
+ */
+
+static void ldisc_receive_buf(struct tty_struct *tty,
+ const __u8 *data, char *flags, int count)
+{
+ struct tty_ldisc *ld;
+ if (!tty)
+ return;
+ ld = tty_ldisc_ref(tty);
+ if (ld) {
+ if (ld->ops->receive_buf)
+ ld->ops->receive_buf(tty, data, flags, count);
+ tty_ldisc_deref(ld);
+ }
+}
+
+/* mgsl_stop() throttle (stop) transmitter
+ *
+ * Arguments: tty pointer to tty info structure
+ * Return Value: None
+ */
+static void mgsl_stop(struct tty_struct *tty)
+{
+ struct mgsl_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_stop"))
+ return;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk("mgsl_stop(%s)\n",info->device_name);
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if (info->tx_enabled)
+ usc_stop_transmitter(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+} /* end of mgsl_stop() */
+
+/* mgsl_start() release (start) transmitter
+ *
+ * Arguments: tty pointer to tty info structure
+ * Return Value: None
+ */
+static void mgsl_start(struct tty_struct *tty)
+{
+ struct mgsl_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_start"))
+ return;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk("mgsl_start(%s)\n",info->device_name);
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if (!info->tx_enabled)
+ usc_start_transmitter(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+} /* end of mgsl_start() */
+
+/*
+ * Bottom half work queue access functions
+ */
+
+/* mgsl_bh_action() Return next bottom half action to perform.
+ * Return Value: BH action code or 0 if nothing to do.
+ */
+static int mgsl_bh_action(struct mgsl_struct *info)
+{
+ unsigned long flags;
+ int rc = 0;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+
+ if (info->pending_bh & BH_RECEIVE) {
+ info->pending_bh &= ~BH_RECEIVE;
+ rc = BH_RECEIVE;
+ } else if (info->pending_bh & BH_TRANSMIT) {
+ info->pending_bh &= ~BH_TRANSMIT;
+ rc = BH_TRANSMIT;
+ } else if (info->pending_bh & BH_STATUS) {
+ info->pending_bh &= ~BH_STATUS;
+ rc = BH_STATUS;
+ }
+
+ if (!rc) {
+ /* Mark BH routine as complete */
+ info->bh_running = false;
+ info->bh_requested = false;
+ }
+
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ return rc;
+}
+
+/*
+ * Perform bottom half processing of work items queued by ISR.
+ */
+static void mgsl_bh_handler(struct work_struct *work)
+{
+ struct mgsl_struct *info =
+ container_of(work, struct mgsl_struct, task);
+ int action;
+
+ if (!info)
+ return;
+
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk( "%s(%d):mgsl_bh_handler(%s) entry\n",
+ __FILE__,__LINE__,info->device_name);
+
+ info->bh_running = true;
+
+ while((action = mgsl_bh_action(info)) != 0) {
+
+ /* Process work item */
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk( "%s(%d):mgsl_bh_handler() work item action=%d\n",
+ __FILE__,__LINE__,action);
+
+ switch (action) {
+
+ case BH_RECEIVE:
+ mgsl_bh_receive(info);
+ break;
+ case BH_TRANSMIT:
+ mgsl_bh_transmit(info);
+ break;
+ case BH_STATUS:
+ mgsl_bh_status(info);
+ break;
+ default:
+ /* unknown work item ID */
+ printk("Unknown work item ID=%08X!\n", action);
+ break;
+ }
+ }
+
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk( "%s(%d):mgsl_bh_handler(%s) exit\n",
+ __FILE__,__LINE__,info->device_name);
+}
+
+static void mgsl_bh_receive(struct mgsl_struct *info)
+{
+ bool (*get_rx_frame)(struct mgsl_struct *info) =
+ (info->params.mode == MGSL_MODE_HDLC ? mgsl_get_rx_frame : mgsl_get_raw_rx_frame);
+
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk( "%s(%d):mgsl_bh_receive(%s)\n",
+ __FILE__,__LINE__,info->device_name);
+
+ do
+ {
+ if (info->rx_rcc_underrun) {
+ unsigned long flags;
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_start_receiver(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ return;
+ }
+ } while(get_rx_frame(info));
+}
+
+static void mgsl_bh_transmit(struct mgsl_struct *info)
+{
+ struct tty_struct *tty = info->port.tty;
+ unsigned long flags;
+
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk( "%s(%d):mgsl_bh_transmit() entry on %s\n",
+ __FILE__,__LINE__,info->device_name);
+
+ if (tty)
+ tty_wakeup(tty);
+
+ /* if transmitter idle and loopmode_send_done_requested
+ * then start echoing RxD to TxD
+ */
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if ( !info->tx_active && info->loopmode_send_done_requested )
+ usc_loopmode_send_done( info );
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+}
+
+static void mgsl_bh_status(struct mgsl_struct *info)
+{
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk( "%s(%d):mgsl_bh_status() entry on %s\n",
+ __FILE__,__LINE__,info->device_name);
+
+ info->ri_chkcount = 0;
+ info->dsr_chkcount = 0;
+ info->dcd_chkcount = 0;
+ info->cts_chkcount = 0;
+}
+
+/* mgsl_isr_receive_status()
+ *
+ * Service a receive status interrupt. The type of status
+ * interrupt is indicated by the state of the RCSR.
+ * This is only used for HDLC mode.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void mgsl_isr_receive_status( struct mgsl_struct *info )
+{
+ u16 status = usc_InReg( info, RCSR );
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):mgsl_isr_receive_status status=%04X\n",
+ __FILE__,__LINE__,status);
+
+ if ( (status & RXSTATUS_ABORT_RECEIVED) &&
+ info->loopmode_insert_requested &&
+ usc_loopmode_active(info) )
+ {
+ ++info->icount.rxabort;
+ info->loopmode_insert_requested = false;
+
+ /* clear CMR:13 to start echoing RxD to TxD */
+ info->cmr_value &= ~BIT13;
+ usc_OutReg(info, CMR, info->cmr_value);
+
+ /* disable received abort irq (no longer required) */
+ usc_OutReg(info, RICR,
+ (usc_InReg(info, RICR) & ~RXSTATUS_ABORT_RECEIVED));
+ }
+
+ if (status & (RXSTATUS_EXITED_HUNT + RXSTATUS_IDLE_RECEIVED)) {
+ if (status & RXSTATUS_EXITED_HUNT)
+ info->icount.exithunt++;
+ if (status & RXSTATUS_IDLE_RECEIVED)
+ info->icount.rxidle++;
+ wake_up_interruptible(&info->event_wait_q);
+ }
+
+ if (status & RXSTATUS_OVERRUN){
+ info->icount.rxover++;
+ usc_process_rxoverrun_sync( info );
+ }
+
+ usc_ClearIrqPendingBits( info, RECEIVE_STATUS );
+ usc_UnlatchRxstatusBits( info, status );
+
+} /* end of mgsl_isr_receive_status() */
+
+/* mgsl_isr_transmit_status()
+ *
+ * Service a transmit status interrupt
+ * HDLC mode :end of transmit frame
+ * Async mode:all data is sent
+ * transmit status is indicated by bits in the TCSR.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void mgsl_isr_transmit_status( struct mgsl_struct *info )
+{
+ u16 status = usc_InReg( info, TCSR );
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):mgsl_isr_transmit_status status=%04X\n",
+ __FILE__,__LINE__,status);
+
+ usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
+ usc_UnlatchTxstatusBits( info, status );
+
+ if ( status & (TXSTATUS_UNDERRUN | TXSTATUS_ABORT_SENT) )
+ {
+ /* finished sending HDLC abort. This may leave */
+ /* the TxFifo with data from the aborted frame */
+ /* so purge the TxFifo. Also shutdown the DMA */
+ /* channel in case there is data remaining in */
+ /* the DMA buffer */
+ usc_DmaCmd( info, DmaCmd_ResetTxChannel );
+ usc_RTCmd( info, RTCmd_PurgeTxFifo );
+ }
+
+ if ( status & TXSTATUS_EOF_SENT )
+ info->icount.txok++;
+ else if ( status & TXSTATUS_UNDERRUN )
+ info->icount.txunder++;
+ else if ( status & TXSTATUS_ABORT_SENT )
+ info->icount.txabort++;
+ else
+ info->icount.txunder++;
+
+ info->tx_active = false;
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ del_timer(&info->tx_timer);
+
+ if ( info->drop_rts_on_tx_done ) {
+ usc_get_serial_signals( info );
+ if ( info->serial_signals & SerialSignal_RTS ) {
+ info->serial_signals &= ~SerialSignal_RTS;
+ usc_set_serial_signals( info );
+ }
+ info->drop_rts_on_tx_done = false;
+ }
+
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount)
+ hdlcdev_tx_done(info);
+ else
+#endif
+ {
+ if (info->port.tty->stopped || info->port.tty->hw_stopped) {
+ usc_stop_transmitter(info);
+ return;
+ }
+ info->pending_bh |= BH_TRANSMIT;
+ }
+
+} /* end of mgsl_isr_transmit_status() */
+
+/* mgsl_isr_io_pin()
+ *
+ * Service an Input/Output pin interrupt. The type of
+ * interrupt is indicated by bits in the MISR
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void mgsl_isr_io_pin( struct mgsl_struct *info )
+{
+ struct mgsl_icount *icount;
+ u16 status = usc_InReg( info, MISR );
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):mgsl_isr_io_pin status=%04X\n",
+ __FILE__,__LINE__,status);
+
+ usc_ClearIrqPendingBits( info, IO_PIN );
+ usc_UnlatchIostatusBits( info, status );
+
+ if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED |
+ MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) {
+ icount = &info->icount;
+ /* update input line counters */
+ if (status & MISCSTATUS_RI_LATCHED) {
+ if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
+ usc_DisablestatusIrqs(info,SICR_RI);
+ icount->rng++;
+ if ( status & MISCSTATUS_RI )
+ info->input_signal_events.ri_up++;
+ else
+ info->input_signal_events.ri_down++;
+ }
+ if (status & MISCSTATUS_DSR_LATCHED) {
+ if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
+ usc_DisablestatusIrqs(info,SICR_DSR);
+ icount->dsr++;
+ if ( status & MISCSTATUS_DSR )
+ info->input_signal_events.dsr_up++;
+ else
+ info->input_signal_events.dsr_down++;
+ }
+ if (status & MISCSTATUS_DCD_LATCHED) {
+ if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
+ usc_DisablestatusIrqs(info,SICR_DCD);
+ icount->dcd++;
+ if (status & MISCSTATUS_DCD) {
+ info->input_signal_events.dcd_up++;
+ } else
+ info->input_signal_events.dcd_down++;
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount) {
+ if (status & MISCSTATUS_DCD)
+ netif_carrier_on(info->netdev);
+ else
+ netif_carrier_off(info->netdev);
+ }
+#endif
+ }
+ if (status & MISCSTATUS_CTS_LATCHED)
+ {
+ if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
+ usc_DisablestatusIrqs(info,SICR_CTS);
+ icount->cts++;
+ if ( status & MISCSTATUS_CTS )
+ info->input_signal_events.cts_up++;
+ else
+ info->input_signal_events.cts_down++;
+ }
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+
+ if ( (info->port.flags & ASYNC_CHECK_CD) &&
+ (status & MISCSTATUS_DCD_LATCHED) ) {
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s CD now %s...", info->device_name,
+ (status & MISCSTATUS_DCD) ? "on" : "off");
+ if (status & MISCSTATUS_DCD)
+ wake_up_interruptible(&info->port.open_wait);
+ else {
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("doing serial hangup...");
+ if (info->port.tty)
+ tty_hangup(info->port.tty);
+ }
+ }
+
+ if ( (info->port.flags & ASYNC_CTS_FLOW) &&
+ (status & MISCSTATUS_CTS_LATCHED) ) {
+ if (info->port.tty->hw_stopped) {
+ if (status & MISCSTATUS_CTS) {
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("CTS tx start...");
+ if (info->port.tty)
+ info->port.tty->hw_stopped = 0;
+ usc_start_transmitter(info);
+ info->pending_bh |= BH_TRANSMIT;
+ return;
+ }
+ } else {
+ if (!(status & MISCSTATUS_CTS)) {
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("CTS tx stop...");
+ if (info->port.tty)
+ info->port.tty->hw_stopped = 1;
+ usc_stop_transmitter(info);
+ }
+ }
+ }
+ }
+
+ info->pending_bh |= BH_STATUS;
+
+ /* for diagnostics set IRQ flag */
+ if ( status & MISCSTATUS_TXC_LATCHED ){
+ usc_OutReg( info, SICR,
+ (unsigned short)(usc_InReg(info,SICR) & ~(SICR_TXC_ACTIVE+SICR_TXC_INACTIVE)) );
+ usc_UnlatchIostatusBits( info, MISCSTATUS_TXC_LATCHED );
+ info->irq_occurred = true;
+ }
+
+} /* end of mgsl_isr_io_pin() */
+
+/* mgsl_isr_transmit_data()
+ *
+ * Service a transmit data interrupt (async mode only).
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void mgsl_isr_transmit_data( struct mgsl_struct *info )
+{
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):mgsl_isr_transmit_data xmit_cnt=%d\n",
+ __FILE__,__LINE__,info->xmit_cnt);
+
+ usc_ClearIrqPendingBits( info, TRANSMIT_DATA );
+
+ if (info->port.tty->stopped || info->port.tty->hw_stopped) {
+ usc_stop_transmitter(info);
+ return;
+ }
+
+ if ( info->xmit_cnt )
+ usc_load_txfifo( info );
+ else
+ info->tx_active = false;
+
+ if (info->xmit_cnt < WAKEUP_CHARS)
+ info->pending_bh |= BH_TRANSMIT;
+
+} /* end of mgsl_isr_transmit_data() */
+
+/* mgsl_isr_receive_data()
+ *
+ * Service a receive data interrupt. This occurs
+ * when operating in asynchronous interrupt transfer mode.
+ * The receive data FIFO is flushed to the receive data buffers.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void mgsl_isr_receive_data( struct mgsl_struct *info )
+{
+ int Fifocount;
+ u16 status;
+ int work = 0;
+ unsigned char DataByte;
+ struct tty_struct *tty = info->port.tty;
+ struct mgsl_icount *icount = &info->icount;
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):mgsl_isr_receive_data\n",
+ __FILE__,__LINE__);
+
+ usc_ClearIrqPendingBits( info, RECEIVE_DATA );
+
+ /* select FIFO status for RICR readback */
+ usc_RCmd( info, RCmd_SelectRicrRxFifostatus );
+
+ /* clear the Wordstatus bit so that status readback */
+ /* only reflects the status of this byte */
+ usc_OutReg( info, RICR+LSBONLY, (u16)(usc_InReg(info, RICR+LSBONLY) & ~BIT3 ));
+
+ /* flush the receive FIFO */
+
+ while( (Fifocount = (usc_InReg(info,RICR) >> 8)) ) {
+ int flag;
+
+ /* read one byte from RxFIFO */
+ outw( (inw(info->io_base + CCAR) & 0x0780) | (RDR+LSBONLY),
+ info->io_base + CCAR );
+ DataByte = inb( info->io_base + CCAR );
+
+ /* get the status of the received byte */
+ status = usc_InReg(info, RCSR);
+ if ( status & (RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR +
+ RXSTATUS_OVERRUN + RXSTATUS_BREAK_RECEIVED) )
+ usc_UnlatchRxstatusBits(info,RXSTATUS_ALL);
+
+ icount->rx++;
+
+ flag = 0;
+ if ( status & (RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR +
+ RXSTATUS_OVERRUN + RXSTATUS_BREAK_RECEIVED) ) {
+ printk("rxerr=%04X\n",status);
+ /* update error statistics */
+ if ( status & RXSTATUS_BREAK_RECEIVED ) {
+ status &= ~(RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR);
+ icount->brk++;
+ } else if (status & RXSTATUS_PARITY_ERROR)
+ icount->parity++;
+ else if (status & RXSTATUS_FRAMING_ERROR)
+ icount->frame++;
+ else if (status & RXSTATUS_OVERRUN) {
+ /* must issue purge fifo cmd before */
+ /* 16C32 accepts more receive chars */
+ usc_RTCmd(info,RTCmd_PurgeRxFifo);
+ icount->overrun++;
+ }
+
+ /* discard char if tty control flags say so */
+ if (status & info->ignore_status_mask)
+ continue;
+
+ status &= info->read_status_mask;
+
+ if (status & RXSTATUS_BREAK_RECEIVED) {
+ flag = TTY_BREAK;
+ if (info->port.flags & ASYNC_SAK)
+ do_SAK(tty);
+ } else if (status & RXSTATUS_PARITY_ERROR)
+ flag = TTY_PARITY;
+ else if (status & RXSTATUS_FRAMING_ERROR)
+ flag = TTY_FRAME;
+ } /* end of if (error) */
+ tty_insert_flip_char(tty, DataByte, flag);
+ if (status & RXSTATUS_OVERRUN) {
+ /* Overrun is special, since it's
+ * reported immediately, and doesn't
+ * affect the current character
+ */
+ work += tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+ }
+ }
+
+ if ( debug_level >= DEBUG_LEVEL_ISR ) {
+ printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
+ __FILE__,__LINE__,icount->rx,icount->brk,
+ icount->parity,icount->frame,icount->overrun);
+ }
+
+ if(work)
+ tty_flip_buffer_push(tty);
+}
+
+/* mgsl_isr_misc()
+ *
+ * Service a miscellaneous interrupt source.
+ *
+ * Arguments: info pointer to device extension (instance data)
+ * Return Value: None
+ */
+static void mgsl_isr_misc( struct mgsl_struct *info )
+{
+ u16 status = usc_InReg( info, MISR );
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):mgsl_isr_misc status=%04X\n",
+ __FILE__,__LINE__,status);
+
+ if ((status & MISCSTATUS_RCC_UNDERRUN) &&
+ (info->params.mode == MGSL_MODE_HDLC)) {
+
+ /* turn off receiver and rx DMA */
+ usc_EnableReceiver(info,DISABLE_UNCONDITIONAL);
+ usc_DmaCmd(info, DmaCmd_ResetRxChannel);
+ usc_UnlatchRxstatusBits(info, RXSTATUS_ALL);
+ usc_ClearIrqPendingBits(info, RECEIVE_DATA + RECEIVE_STATUS);
+ usc_DisableInterrupts(info, RECEIVE_DATA + RECEIVE_STATUS);
+
+ /* schedule BH handler to restart receiver */
+ info->pending_bh |= BH_RECEIVE;
+ info->rx_rcc_underrun = true;
+ }
+
+ usc_ClearIrqPendingBits( info, MISC );
+ usc_UnlatchMiscstatusBits( info, status );
+
+} /* end of mgsl_isr_misc() */
+
+/* mgsl_isr_null()
+ *
+ * Services undefined interrupt vectors from the
+ * USC. (hence this function SHOULD never be called)
+ *
+ * Arguments: info pointer to device extension (instance data)
+ * Return Value: None
+ */
+static void mgsl_isr_null( struct mgsl_struct *info )
+{
+
+} /* end of mgsl_isr_null() */
+
+/* mgsl_isr_receive_dma()
+ *
+ * Service a receive DMA channel interrupt.
+ * For this driver there are two sources of receive DMA interrupts
+ * as identified in the Receive DMA mode Register (RDMR):
+ *
+ * BIT3 EOA/EOL End of List, all receive buffers in receive
+ * buffer list have been filled (no more free buffers
+ * available). The DMA controller has shut down.
+ *
+ * BIT2 EOB End of Buffer. This interrupt occurs when a receive
+ * DMA buffer is terminated in response to completion
+ * of a good frame or a frame with errors. The status
+ * of the frame is stored in the buffer entry in the
+ * list of receive buffer entries.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void mgsl_isr_receive_dma( struct mgsl_struct *info )
+{
+ u16 status;
+
+ /* clear interrupt pending and IUS bit for Rx DMA IRQ */
+ usc_OutDmaReg( info, CDIR, BIT9+BIT1 );
+
+ /* Read the receive DMA status to identify interrupt type. */
+ /* This also clears the status bits. */
+ status = usc_InDmaReg( info, RDMR );
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):mgsl_isr_receive_dma(%s) status=%04X\n",
+ __FILE__,__LINE__,info->device_name,status);
+
+ info->pending_bh |= BH_RECEIVE;
+
+ if ( status & BIT3 ) {
+ info->rx_overflow = true;
+ info->icount.buf_overrun++;
+ }
+
+} /* end of mgsl_isr_receive_dma() */
+
+/* mgsl_isr_transmit_dma()
+ *
+ * This function services a transmit DMA channel interrupt.
+ *
+ * For this driver there is one source of transmit DMA interrupts
+ * as identified in the Transmit DMA Mode Register (TDMR):
+ *
+ * BIT2 EOB End of Buffer. This interrupt occurs when a
+ * transmit DMA buffer has been emptied.
+ *
+ * The driver maintains enough transmit DMA buffers to hold at least
+ * one max frame size transmit frame. When operating in a buffered
+ * transmit mode, there may be enough transmit DMA buffers to hold at
+ * least two or more max frame size frames. On an EOB condition,
+ * determine if there are any queued transmit buffers and copy into
+ * transmit DMA buffers if we have room.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void mgsl_isr_transmit_dma( struct mgsl_struct *info )
+{
+ u16 status;
+
+ /* clear interrupt pending and IUS bit for Tx DMA IRQ */
+ usc_OutDmaReg(info, CDIR, BIT8+BIT0 );
+
+ /* Read the transmit DMA status to identify interrupt type. */
+ /* This also clears the status bits. */
+
+ status = usc_InDmaReg( info, TDMR );
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):mgsl_isr_transmit_dma(%s) status=%04X\n",
+ __FILE__,__LINE__,info->device_name,status);
+
+ if ( status & BIT2 ) {
+ --info->tx_dma_buffers_used;
+
+ /* if there are transmit frames queued,
+ * try to load the next one
+ */
+ if ( load_next_tx_holding_buffer(info) ) {
+ /* if call returns non-zero value, we have
+ * at least one free tx holding buffer
+ */
+ info->pending_bh |= BH_TRANSMIT;
+ }
+ }
+
+} /* end of mgsl_isr_transmit_dma() */
+
+/* mgsl_interrupt()
+ *
+ * Interrupt service routine entry point.
+ *
+ * Arguments:
+ *
+ * irq interrupt number that caused interrupt
+ * dev_id device ID supplied during interrupt registration
+ *
+ * Return Value: None
+ */
+static irqreturn_t mgsl_interrupt(int dummy, void *dev_id)
+{
+ struct mgsl_struct *info = dev_id;
+ u16 UscVector;
+ u16 DmaVector;
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk(KERN_DEBUG "%s(%d):mgsl_interrupt(%d)entry.\n",
+ __FILE__, __LINE__, info->irq_level);
+
+ spin_lock(&info->irq_spinlock);
+
+ for(;;) {
+ /* Read the interrupt vectors from hardware. */
+ UscVector = usc_InReg(info, IVR) >> 9;
+ DmaVector = usc_InDmaReg(info, DIVR);
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s UscVector=%08X DmaVector=%08X\n",
+ __FILE__,__LINE__,info->device_name,UscVector,DmaVector);
+
+ if ( !UscVector && !DmaVector )
+ break;
+
+ /* Dispatch interrupt vector */
+ if ( UscVector )
+ (*UscIsrTable[UscVector])(info);
+ else if ( (DmaVector&(BIT10|BIT9)) == BIT10)
+ mgsl_isr_transmit_dma(info);
+ else
+ mgsl_isr_receive_dma(info);
+
+ if ( info->isr_overflow ) {
+ printk(KERN_ERR "%s(%d):%s isr overflow irq=%d\n",
+ __FILE__, __LINE__, info->device_name, info->irq_level);
+ usc_DisableMasterIrqBit(info);
+ usc_DisableDmaInterrupts(info,DICR_MASTER);
+ break;
+ }
+ }
+
+ /* Request bottom half processing if there's something
+ * for it to do and the bh is not already running
+ */
+
+ if ( info->pending_bh && !info->bh_running && !info->bh_requested ) {
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s queueing bh task.\n",
+ __FILE__,__LINE__,info->device_name);
+ schedule_work(&info->task);
+ info->bh_requested = true;
+ }
+
+ spin_unlock(&info->irq_spinlock);
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk(KERN_DEBUG "%s(%d):mgsl_interrupt(%d)exit.\n",
+ __FILE__, __LINE__, info->irq_level);
+
+ return IRQ_HANDLED;
+} /* end of mgsl_interrupt() */
+
+/* startup()
+ *
+ * Initialize and start device.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: 0 if success, otherwise error code
+ */
+static int startup(struct mgsl_struct * info)
+{
+ int retval = 0;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk("%s(%d):mgsl_startup(%s)\n",__FILE__,__LINE__,info->device_name);
+
+ if (info->port.flags & ASYNC_INITIALIZED)
+ return 0;
+
+ if (!info->xmit_buf) {
+ /* allocate a page of memory for a transmit buffer */
+ info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
+ if (!info->xmit_buf) {
+ printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
+ __FILE__,__LINE__,info->device_name);
+ return -ENOMEM;
+ }
+ }
+
+ info->pending_bh = 0;
+
+ memset(&info->icount, 0, sizeof(info->icount));
+
+ setup_timer(&info->tx_timer, mgsl_tx_timeout, (unsigned long)info);
+
+ /* Allocate and claim adapter resources */
+ retval = mgsl_claim_resources(info);
+
+ /* perform existence check and diagnostics */
+ if ( !retval )
+ retval = mgsl_adapter_test(info);
+
+ if ( retval ) {
+ if (capable(CAP_SYS_ADMIN) && info->port.tty)
+ set_bit(TTY_IO_ERROR, &info->port.tty->flags);
+ mgsl_release_resources(info);
+ return retval;
+ }
+
+ /* program hardware for current parameters */
+ mgsl_change_params(info);
+
+ if (info->port.tty)
+ clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
+
+ info->port.flags |= ASYNC_INITIALIZED;
+
+ return 0;
+
+} /* end of startup() */
+
+/* shutdown()
+ *
+ * Called by mgsl_close() and mgsl_hangup() to shutdown hardware
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void shutdown(struct mgsl_struct * info)
+{
+ unsigned long flags;
+
+ if (!(info->port.flags & ASYNC_INITIALIZED))
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_shutdown(%s)\n",
+ __FILE__,__LINE__, info->device_name );
+
+ /* clear status wait queue because status changes */
+ /* can't happen after shutting down the hardware */
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+
+ del_timer_sync(&info->tx_timer);
+
+ if (info->xmit_buf) {
+ free_page((unsigned long) info->xmit_buf);
+ info->xmit_buf = NULL;
+ }
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_DisableMasterIrqBit(info);
+ usc_stop_receiver(info);
+ usc_stop_transmitter(info);
+ usc_DisableInterrupts(info,RECEIVE_DATA + RECEIVE_STATUS +
+ TRANSMIT_DATA + TRANSMIT_STATUS + IO_PIN + MISC );
+ usc_DisableDmaInterrupts(info,DICR_MASTER + DICR_TRANSMIT + DICR_RECEIVE);
+
+ /* Disable DMAEN (Port 7, Bit 14) */
+ /* This disconnects the DMA request signal from the ISA bus */
+ /* on the ISA adapter. This has no effect for the PCI adapter */
+ usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) | BIT14));
+
+ /* Disable INTEN (Port 6, Bit12) */
+ /* This disconnects the IRQ request signal to the ISA bus */
+ /* on the ISA adapter. This has no effect for the PCI adapter */
+ usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) | BIT12));
+
+ if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) {
+ info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
+ usc_set_serial_signals(info);
+ }
+
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ mgsl_release_resources(info);
+
+ if (info->port.tty)
+ set_bit(TTY_IO_ERROR, &info->port.tty->flags);
+
+ info->port.flags &= ~ASYNC_INITIALIZED;
+
+} /* end of shutdown() */
+
+static void mgsl_program_hw(struct mgsl_struct *info)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+
+ usc_stop_receiver(info);
+ usc_stop_transmitter(info);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+ if (info->params.mode == MGSL_MODE_HDLC ||
+ info->params.mode == MGSL_MODE_RAW ||
+ info->netcount)
+ usc_set_sync_mode(info);
+ else
+ usc_set_async_mode(info);
+
+ usc_set_serial_signals(info);
+
+ info->dcd_chkcount = 0;
+ info->cts_chkcount = 0;
+ info->ri_chkcount = 0;
+ info->dsr_chkcount = 0;
+
+ usc_EnableStatusIrqs(info,SICR_CTS+SICR_DSR+SICR_DCD+SICR_RI);
+ usc_EnableInterrupts(info, IO_PIN);
+ usc_get_serial_signals(info);
+
+ if (info->netcount || info->port.tty->termios->c_cflag & CREAD)
+ usc_start_receiver(info);
+
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+}
+
+/* Reconfigure adapter based on new parameters
+ */
+static void mgsl_change_params(struct mgsl_struct *info)
+{
+ unsigned cflag;
+ int bits_per_char;
+
+ if (!info->port.tty || !info->port.tty->termios)
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_change_params(%s)\n",
+ __FILE__,__LINE__, info->device_name );
+
+ cflag = info->port.tty->termios->c_cflag;
+
+ /* if B0 rate (hangup) specified then negate DTR and RTS */
+ /* otherwise assert DTR and RTS */
+ if (cflag & CBAUD)
+ info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+ else
+ info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+
+ /* byte size and parity */
+
+ switch (cflag & CSIZE) {
+ case CS5: info->params.data_bits = 5; break;
+ case CS6: info->params.data_bits = 6; break;
+ case CS7: info->params.data_bits = 7; break;
+ case CS8: info->params.data_bits = 8; break;
+ /* Never happens, but GCC is too dumb to figure it out */
+ default: info->params.data_bits = 7; break;
+ }
+
+ if (cflag & CSTOPB)
+ info->params.stop_bits = 2;
+ else
+ info->params.stop_bits = 1;
+
+ info->params.parity = ASYNC_PARITY_NONE;
+ if (cflag & PARENB) {
+ if (cflag & PARODD)
+ info->params.parity = ASYNC_PARITY_ODD;
+ else
+ info->params.parity = ASYNC_PARITY_EVEN;
+#ifdef CMSPAR
+ if (cflag & CMSPAR)
+ info->params.parity = ASYNC_PARITY_SPACE;
+#endif
+ }
+
+ /* calculate number of jiffies to transmit a full
+ * FIFO (32 bytes) at specified data rate
+ */
+ bits_per_char = info->params.data_bits +
+ info->params.stop_bits + 1;
+
+ /* if port data rate is set to 460800 or less then
+ * allow tty settings to override, otherwise keep the
+ * current data rate.
+ */
+ if (info->params.data_rate <= 460800)
+ info->params.data_rate = tty_get_baud_rate(info->port.tty);
+
+ if ( info->params.data_rate ) {
+ info->timeout = (32*HZ*bits_per_char) /
+ info->params.data_rate;
+ }
+ info->timeout += HZ/50; /* Add .02 seconds of slop */
+
+ if (cflag & CRTSCTS)
+ info->port.flags |= ASYNC_CTS_FLOW;
+ else
+ info->port.flags &= ~ASYNC_CTS_FLOW;
+
+ if (cflag & CLOCAL)
+ info->port.flags &= ~ASYNC_CHECK_CD;
+ else
+ info->port.flags |= ASYNC_CHECK_CD;
+
+ /* process tty input control flags */
+
+ info->read_status_mask = RXSTATUS_OVERRUN;
+ if (I_INPCK(info->port.tty))
+ info->read_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR;
+ if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
+ info->read_status_mask |= RXSTATUS_BREAK_RECEIVED;
+
+ if (I_IGNPAR(info->port.tty))
+ info->ignore_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR;
+ if (I_IGNBRK(info->port.tty)) {
+ info->ignore_status_mask |= RXSTATUS_BREAK_RECEIVED;
+ /* If ignoring parity and break indicators, ignore
+ * overruns too. (For real raw support).
+ */
+ if (I_IGNPAR(info->port.tty))
+ info->ignore_status_mask |= RXSTATUS_OVERRUN;
+ }
+
+ mgsl_program_hw(info);
+
+} /* end of mgsl_change_params() */
+
+/* mgsl_put_char()
+ *
+ * Add a character to the transmit buffer.
+ *
+ * Arguments: tty pointer to tty information structure
+ * ch character to add to transmit buffer
+ *
+ * Return Value: None
+ */
+static int mgsl_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct mgsl_struct *info = tty->driver_data;
+ unsigned long flags;
+ int ret = 0;
+
+ if (debug_level >= DEBUG_LEVEL_INFO) {
+ printk(KERN_DEBUG "%s(%d):mgsl_put_char(%d) on %s\n",
+ __FILE__, __LINE__, ch, info->device_name);
+ }
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_put_char"))
+ return 0;
+
+ if (!info->xmit_buf)
+ return 0;
+
+ spin_lock_irqsave(&info->irq_spinlock, flags);
+
+ if ((info->params.mode == MGSL_MODE_ASYNC ) || !info->tx_active) {
+ if (info->xmit_cnt < SERIAL_XMIT_SIZE - 1) {
+ info->xmit_buf[info->xmit_head++] = ch;
+ info->xmit_head &= SERIAL_XMIT_SIZE-1;
+ info->xmit_cnt++;
+ ret = 1;
+ }
+ }
+ spin_unlock_irqrestore(&info->irq_spinlock, flags);
+ return ret;
+
+} /* end of mgsl_put_char() */
+
+/* mgsl_flush_chars()
+ *
+ * Enable transmitter so remaining characters in the
+ * transmit buffer are sent.
+ *
+ * Arguments: tty pointer to tty information structure
+ * Return Value: None
+ */
+static void mgsl_flush_chars(struct tty_struct *tty)
+{
+ struct mgsl_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):mgsl_flush_chars() entry on %s xmit_cnt=%d\n",
+ __FILE__,__LINE__,info->device_name,info->xmit_cnt);
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_flush_chars"))
+ return;
+
+ if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
+ !info->xmit_buf)
+ return;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):mgsl_flush_chars() entry on %s starting transmitter\n",
+ __FILE__,__LINE__,info->device_name );
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+
+ if (!info->tx_active) {
+ if ( (info->params.mode == MGSL_MODE_HDLC ||
+ info->params.mode == MGSL_MODE_RAW) && info->xmit_cnt ) {
+ /* operating in synchronous (frame oriented) mode */
+ /* copy data from circular xmit_buf to */
+ /* transmit DMA buffer. */
+ mgsl_load_tx_dma_buffer(info,
+ info->xmit_buf,info->xmit_cnt);
+ }
+ usc_start_transmitter(info);
+ }
+
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+} /* end of mgsl_flush_chars() */
+
+/* mgsl_write()
+ *
+ * Send a block of data
+ *
+ * Arguments:
+ *
+ * tty pointer to tty information structure
+ * buf pointer to buffer containing send data
+ * count size of send data in bytes
+ *
+ * Return Value: number of characters written
+ */
+static int mgsl_write(struct tty_struct * tty,
+ const unsigned char *buf, int count)
+{
+ int c, ret = 0;
+ struct mgsl_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):mgsl_write(%s) count=%d\n",
+ __FILE__,__LINE__,info->device_name,count);
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_write"))
+ goto cleanup;
+
+ if (!info->xmit_buf)
+ goto cleanup;
+
+ if ( info->params.mode == MGSL_MODE_HDLC ||
+ info->params.mode == MGSL_MODE_RAW ) {
+ /* operating in synchronous (frame oriented) mode */
+ /* operating in synchronous (frame oriented) mode */
+ if (info->tx_active) {
+
+ if ( info->params.mode == MGSL_MODE_HDLC ) {
+ ret = 0;
+ goto cleanup;
+ }
+ /* transmitter is actively sending data -
+ * if we have multiple transmit dma and
+ * holding buffers, attempt to queue this
+ * frame for transmission at a later time.
+ */
+ if (info->tx_holding_count >= info->num_tx_holding_buffers ) {
+ /* no tx holding buffers available */
+ ret = 0;
+ goto cleanup;
+ }
+
+ /* queue transmit frame request */
+ ret = count;
+ save_tx_buffer_request(info,buf,count);
+
+ /* if we have sufficient tx dma buffers,
+ * load the next buffered tx request
+ */
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ load_next_tx_holding_buffer(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ goto cleanup;
+ }
+
+ /* if operating in HDLC LoopMode and the adapter */
+ /* has yet to be inserted into the loop, we can't */
+ /* transmit */
+
+ if ( (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) &&
+ !usc_loopmode_active(info) )
+ {
+ ret = 0;
+ goto cleanup;
+ }
+
+ if ( info->xmit_cnt ) {
+ /* Send accumulated from send_char() calls */
+ /* as frame and wait before accepting more data. */
+ ret = 0;
+
+ /* copy data from circular xmit_buf to */
+ /* transmit DMA buffer. */
+ mgsl_load_tx_dma_buffer(info,
+ info->xmit_buf,info->xmit_cnt);
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):mgsl_write(%s) sync xmit_cnt flushing\n",
+ __FILE__,__LINE__,info->device_name);
+ } else {
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):mgsl_write(%s) sync transmit accepted\n",
+ __FILE__,__LINE__,info->device_name);
+ ret = count;
+ info->xmit_cnt = count;
+ mgsl_load_tx_dma_buffer(info,buf,count);
+ }
+ } else {
+ while (1) {
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ c = min_t(int, count,
+ min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - info->xmit_head));
+ if (c <= 0) {
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ break;
+ }
+ memcpy(info->xmit_buf + info->xmit_head, buf, c);
+ info->xmit_head = ((info->xmit_head + c) &
+ (SERIAL_XMIT_SIZE-1));
+ info->xmit_cnt += c;
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ buf += c;
+ count -= c;
+ ret += c;
+ }
+ }
+
+ if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if (!info->tx_active)
+ usc_start_transmitter(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ }
+cleanup:
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):mgsl_write(%s) returning=%d\n",
+ __FILE__,__LINE__,info->device_name,ret);
+
+ return ret;
+
+} /* end of mgsl_write() */
+
+/* mgsl_write_room()
+ *
+ * Return the count of free bytes in transmit buffer
+ *
+ * Arguments: tty pointer to tty info structure
+ * Return Value: None
+ */
+static int mgsl_write_room(struct tty_struct *tty)
+{
+ struct mgsl_struct *info = tty->driver_data;
+ int ret;
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_write_room"))
+ return 0;
+ ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
+ if (ret < 0)
+ ret = 0;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_write_room(%s)=%d\n",
+ __FILE__,__LINE__, info->device_name,ret );
+
+ if ( info->params.mode == MGSL_MODE_HDLC ||
+ info->params.mode == MGSL_MODE_RAW ) {
+ /* operating in synchronous (frame oriented) mode */
+ if ( info->tx_active )
+ return 0;
+ else
+ return HDLC_MAX_FRAME_SIZE;
+ }
+
+ return ret;
+
+} /* end of mgsl_write_room() */
+
+/* mgsl_chars_in_buffer()
+ *
+ * Return the count of bytes in transmit buffer
+ *
+ * Arguments: tty pointer to tty info structure
+ * Return Value: None
+ */
+static int mgsl_chars_in_buffer(struct tty_struct *tty)
+{
+ struct mgsl_struct *info = tty->driver_data;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_chars_in_buffer(%s)\n",
+ __FILE__,__LINE__, info->device_name );
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_chars_in_buffer"))
+ return 0;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_chars_in_buffer(%s)=%d\n",
+ __FILE__,__LINE__, info->device_name,info->xmit_cnt );
+
+ if ( info->params.mode == MGSL_MODE_HDLC ||
+ info->params.mode == MGSL_MODE_RAW ) {
+ /* operating in synchronous (frame oriented) mode */
+ if ( info->tx_active )
+ return info->max_frame_size;
+ else
+ return 0;
+ }
+
+ return info->xmit_cnt;
+} /* end of mgsl_chars_in_buffer() */
+
+/* mgsl_flush_buffer()
+ *
+ * Discard all data in the send buffer
+ *
+ * Arguments: tty pointer to tty info structure
+ * Return Value: None
+ */
+static void mgsl_flush_buffer(struct tty_struct *tty)
+{
+ struct mgsl_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_flush_buffer(%s) entry\n",
+ __FILE__,__LINE__, info->device_name );
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_flush_buffer"))
+ return;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ del_timer(&info->tx_timer);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ tty_wakeup(tty);
+}
+
+/* mgsl_send_xchar()
+ *
+ * Send a high-priority XON/XOFF character
+ *
+ * Arguments: tty pointer to tty info structure
+ * ch character to send
+ * Return Value: None
+ */
+static void mgsl_send_xchar(struct tty_struct *tty, char ch)
+{
+ struct mgsl_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_send_xchar(%s,%d)\n",
+ __FILE__,__LINE__, info->device_name, ch );
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_send_xchar"))
+ return;
+
+ info->x_char = ch;
+ if (ch) {
+ /* Make sure transmit interrupts are on */
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if (!info->tx_enabled)
+ usc_start_transmitter(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ }
+} /* end of mgsl_send_xchar() */
+
+/* mgsl_throttle()
+ *
+ * Signal remote device to throttle send data (our receive data)
+ *
+ * Arguments: tty pointer to tty info structure
+ * Return Value: None
+ */
+static void mgsl_throttle(struct tty_struct * tty)
+{
+ struct mgsl_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_throttle(%s) entry\n",
+ __FILE__,__LINE__, info->device_name );
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_throttle"))
+ return;
+
+ if (I_IXOFF(tty))
+ mgsl_send_xchar(tty, STOP_CHAR(tty));
+
+ if (tty->termios->c_cflag & CRTSCTS) {
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ info->serial_signals &= ~SerialSignal_RTS;
+ usc_set_serial_signals(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ }
+} /* end of mgsl_throttle() */
+
+/* mgsl_unthrottle()
+ *
+ * Signal remote device to stop throttling send data (our receive data)
+ *
+ * Arguments: tty pointer to tty info structure
+ * Return Value: None
+ */
+static void mgsl_unthrottle(struct tty_struct * tty)
+{
+ struct mgsl_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_unthrottle(%s) entry\n",
+ __FILE__,__LINE__, info->device_name );
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_unthrottle"))
+ return;
+
+ if (I_IXOFF(tty)) {
+ if (info->x_char)
+ info->x_char = 0;
+ else
+ mgsl_send_xchar(tty, START_CHAR(tty));
+ }
+
+ if (tty->termios->c_cflag & CRTSCTS) {
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ info->serial_signals |= SerialSignal_RTS;
+ usc_set_serial_signals(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ }
+
+} /* end of mgsl_unthrottle() */
+
+/* mgsl_get_stats()
+ *
+ * get the current serial parameters information
+ *
+ * Arguments: info pointer to device instance data
+ * user_icount pointer to buffer to hold returned stats
+ *
+ * Return Value: 0 if success, otherwise error code
+ */
+static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount __user *user_icount)
+{
+ int err;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_get_params(%s)\n",
+ __FILE__,__LINE__, info->device_name);
+
+ if (!user_icount) {
+ memset(&info->icount, 0, sizeof(info->icount));
+ } else {
+ mutex_lock(&info->port.mutex);
+ COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
+ mutex_unlock(&info->port.mutex);
+ if (err)
+ return -EFAULT;
+ }
+
+ return 0;
+
+} /* end of mgsl_get_stats() */
+
+/* mgsl_get_params()
+ *
+ * get the current serial parameters information
+ *
+ * Arguments: info pointer to device instance data
+ * user_params pointer to buffer to hold returned params
+ *
+ * Return Value: 0 if success, otherwise error code
+ */
+static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_params)
+{
+ int err;
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_get_params(%s)\n",
+ __FILE__,__LINE__, info->device_name);
+
+ mutex_lock(&info->port.mutex);
+ COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
+ mutex_unlock(&info->port.mutex);
+ if (err) {
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):mgsl_get_params(%s) user buffer copy failed\n",
+ __FILE__,__LINE__,info->device_name);
+ return -EFAULT;
+ }
+
+ return 0;
+
+} /* end of mgsl_get_params() */
+
+/* mgsl_set_params()
+ *
+ * set the serial parameters
+ *
+ * Arguments:
+ *
+ * info pointer to device instance data
+ * new_params user buffer containing new serial params
+ *
+ * Return Value: 0 if success, otherwise error code
+ */
+static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_params)
+{
+ unsigned long flags;
+ MGSL_PARAMS tmp_params;
+ int err;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_set_params %s\n", __FILE__,__LINE__,
+ info->device_name );
+ COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
+ if (err) {
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):mgsl_set_params(%s) user buffer copy failed\n",
+ __FILE__,__LINE__,info->device_name);
+ return -EFAULT;
+ }
+
+ mutex_lock(&info->port.mutex);
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ mgsl_change_params(info);
+ mutex_unlock(&info->port.mutex);
+
+ return 0;
+
+} /* end of mgsl_set_params() */
+
+/* mgsl_get_txidle()
+ *
+ * get the current transmit idle mode
+ *
+ * Arguments: info pointer to device instance data
+ * idle_mode pointer to buffer to hold returned idle mode
+ *
+ * Return Value: 0 if success, otherwise error code
+ */
+static int mgsl_get_txidle(struct mgsl_struct * info, int __user *idle_mode)
+{
+ int err;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_get_txidle(%s)=%d\n",
+ __FILE__,__LINE__, info->device_name, info->idle_mode);
+
+ COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
+ if (err) {
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):mgsl_get_txidle(%s) user buffer copy failed\n",
+ __FILE__,__LINE__,info->device_name);
+ return -EFAULT;
+ }
+
+ return 0;
+
+} /* end of mgsl_get_txidle() */
+
+/* mgsl_set_txidle() service ioctl to set transmit idle mode
+ *
+ * Arguments: info pointer to device instance data
+ * idle_mode new idle mode
+ *
+ * Return Value: 0 if success, otherwise error code
+ */
+static int mgsl_set_txidle(struct mgsl_struct * info, int idle_mode)
+{
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_set_txidle(%s,%d)\n", __FILE__,__LINE__,
+ info->device_name, idle_mode );
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ info->idle_mode = idle_mode;
+ usc_set_txidle( info );
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ return 0;
+
+} /* end of mgsl_set_txidle() */
+
+/* mgsl_txenable()
+ *
+ * enable or disable the transmitter
+ *
+ * Arguments:
+ *
+ * info pointer to device instance data
+ * enable 1 = enable, 0 = disable
+ *
+ * Return Value: 0 if success, otherwise error code
+ */
+static int mgsl_txenable(struct mgsl_struct * info, int enable)
+{
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_txenable(%s,%d)\n", __FILE__,__LINE__,
+ info->device_name, enable);
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if ( enable ) {
+ if ( !info->tx_enabled ) {
+
+ usc_start_transmitter(info);
+ /*--------------------------------------------------
+ * if HDLC/SDLC Loop mode, attempt to insert the
+ * station in the 'loop' by setting CMR:13. Upon
+ * receipt of the next GoAhead (RxAbort) sequence,
+ * the OnLoop indicator (CCSR:7) should go active
+ * to indicate that we are on the loop
+ *--------------------------------------------------*/
+ if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
+ usc_loopmode_insert_request( info );
+ }
+ } else {
+ if ( info->tx_enabled )
+ usc_stop_transmitter(info);
+ }
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ return 0;
+
+} /* end of mgsl_txenable() */
+
+/* mgsl_txabort() abort send HDLC frame
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: 0 if success, otherwise error code
+ */
+static int mgsl_txabort(struct mgsl_struct * info)
+{
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_txabort(%s)\n", __FILE__,__LINE__,
+ info->device_name);
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC )
+ {
+ if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
+ usc_loopmode_cancel_transmit( info );
+ else
+ usc_TCmd(info,TCmd_SendAbort);
+ }
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ return 0;
+
+} /* end of mgsl_txabort() */
+
+/* mgsl_rxenable() enable or disable the receiver
+ *
+ * Arguments: info pointer to device instance data
+ * enable 1 = enable, 0 = disable
+ * Return Value: 0 if success, otherwise error code
+ */
+static int mgsl_rxenable(struct mgsl_struct * info, int enable)
+{
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_rxenable(%s,%d)\n", __FILE__,__LINE__,
+ info->device_name, enable);
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if ( enable ) {
+ if ( !info->rx_enabled )
+ usc_start_receiver(info);
+ } else {
+ if ( info->rx_enabled )
+ usc_stop_receiver(info);
+ }
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ return 0;
+
+} /* end of mgsl_rxenable() */
+
+/* mgsl_wait_event() wait for specified event to occur
+ *
+ * Arguments: info pointer to device instance data
+ * mask pointer to bitmask of events to wait for
+ * Return Value: 0 if successful and bit mask updated with
+ * of events triggerred,
+ * otherwise error code
+ */
+static int mgsl_wait_event(struct mgsl_struct * info, int __user * mask_ptr)
+{
+ unsigned long flags;
+ int s;
+ int rc=0;
+ struct mgsl_icount cprev, cnow;
+ int events;
+ int mask;
+ struct _input_signal_events oldsigs, newsigs;
+ DECLARE_WAITQUEUE(wait, current);
+
+ COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
+ if (rc) {
+ return -EFAULT;
+ }
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_wait_event(%s,%d)\n", __FILE__,__LINE__,
+ info->device_name, mask);
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+
+ /* return immediately if state matches requested events */
+ usc_get_serial_signals(info);
+ s = info->serial_signals;
+ events = mask &
+ ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
+ ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
+ ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
+ ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
+ if (events) {
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ goto exit;
+ }
+
+ /* save current irq counts */
+ cprev = info->icount;
+ oldsigs = info->input_signal_events;
+
+ /* enable hunt and idle irqs if needed */
+ if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
+ u16 oldreg = usc_InReg(info,RICR);
+ u16 newreg = oldreg +
+ (mask & MgslEvent_ExitHuntMode ? RXSTATUS_EXITED_HUNT:0) +
+ (mask & MgslEvent_IdleReceived ? RXSTATUS_IDLE_RECEIVED:0);
+ if (oldreg != newreg)
+ usc_OutReg(info, RICR, newreg);
+ }
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&info->event_wait_q, &wait);
+
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+
+ for(;;) {
+ schedule();
+ if (signal_pending(current)) {
+ rc = -ERESTARTSYS;
+ break;
+ }
+
+ /* get current irq counts */
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ cnow = info->icount;
+ newsigs = info->input_signal_events;
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ /* if no change, wait aborted for some reason */
+ if (newsigs.dsr_up == oldsigs.dsr_up &&
+ newsigs.dsr_down == oldsigs.dsr_down &&
+ newsigs.dcd_up == oldsigs.dcd_up &&
+ newsigs.dcd_down == oldsigs.dcd_down &&
+ newsigs.cts_up == oldsigs.cts_up &&
+ newsigs.cts_down == oldsigs.cts_down &&
+ newsigs.ri_up == oldsigs.ri_up &&
+ newsigs.ri_down == oldsigs.ri_down &&
+ cnow.exithunt == cprev.exithunt &&
+ cnow.rxidle == cprev.rxidle) {
+ rc = -EIO;
+ break;
+ }
+
+ events = mask &
+ ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
+ (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
+ (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
+ (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
+ (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
+ (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
+ (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
+ (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
+ (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
+ (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
+ if (events)
+ break;
+
+ cprev = cnow;
+ oldsigs = newsigs;
+ }
+
+ remove_wait_queue(&info->event_wait_q, &wait);
+ set_current_state(TASK_RUNNING);
+
+ if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if (!waitqueue_active(&info->event_wait_q)) {
+ /* disable enable exit hunt mode/idle rcvd IRQs */
+ usc_OutReg(info, RICR, usc_InReg(info,RICR) &
+ ~(RXSTATUS_EXITED_HUNT + RXSTATUS_IDLE_RECEIVED));
+ }
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ }
+exit:
+ if ( rc == 0 )
+ PUT_USER(rc, events, mask_ptr);
+
+ return rc;
+
+} /* end of mgsl_wait_event() */
+
+static int modem_input_wait(struct mgsl_struct *info,int arg)
+{
+ unsigned long flags;
+ int rc;
+ struct mgsl_icount cprev, cnow;
+ DECLARE_WAITQUEUE(wait, current);
+
+ /* save current irq counts */
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ cprev = info->icount;
+ add_wait_queue(&info->status_event_wait_q, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ for(;;) {
+ schedule();
+ if (signal_pending(current)) {
+ rc = -ERESTARTSYS;
+ break;
+ }
+
+ /* get new irq counts */
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ cnow = info->icount;
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ /* if no change, wait aborted for some reason */
+ if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
+ cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
+ rc = -EIO;
+ break;
+ }
+
+ /* check for change in caller specified modem input */
+ if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
+ (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
+ (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
+ (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
+ rc = 0;
+ break;
+ }
+
+ cprev = cnow;
+ }
+ remove_wait_queue(&info->status_event_wait_q, &wait);
+ set_current_state(TASK_RUNNING);
+ return rc;
+}
+
+/* return the state of the serial control and status signals
+ */
+static int tiocmget(struct tty_struct *tty)
+{
+ struct mgsl_struct *info = tty->driver_data;
+ unsigned int result;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_get_serial_signals(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
+ ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
+ ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
+ ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
+ ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
+ ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s tiocmget() value=%08X\n",
+ __FILE__,__LINE__, info->device_name, result );
+ return result;
+}
+
+/* set modem control signals (DTR/RTS)
+ */
+static int tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct mgsl_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s tiocmset(%x,%x)\n",
+ __FILE__,__LINE__,info->device_name, set, clear);
+
+ if (set & TIOCM_RTS)
+ info->serial_signals |= SerialSignal_RTS;
+ if (set & TIOCM_DTR)
+ info->serial_signals |= SerialSignal_DTR;
+ if (clear & TIOCM_RTS)
+ info->serial_signals &= ~SerialSignal_RTS;
+ if (clear & TIOCM_DTR)
+ info->serial_signals &= ~SerialSignal_DTR;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_set_serial_signals(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ return 0;
+}
+
+/* mgsl_break() Set or clear transmit break condition
+ *
+ * Arguments: tty pointer to tty instance data
+ * break_state -1=set break condition, 0=clear
+ * Return Value: error code
+ */
+static int mgsl_break(struct tty_struct *tty, int break_state)
+{
+ struct mgsl_struct * info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_break(%s,%d)\n",
+ __FILE__,__LINE__, info->device_name, break_state);
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_break"))
+ return -EINVAL;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if (break_state == -1)
+ usc_OutReg(info,IOCR,(u16)(usc_InReg(info,IOCR) | BIT7));
+ else
+ usc_OutReg(info,IOCR,(u16)(usc_InReg(info,IOCR) & ~BIT7));
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ return 0;
+
+} /* end of mgsl_break() */
+
+/*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for
+ * RI where only 0->1 is counted.
+ */
+static int msgl_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+
+{
+ struct mgsl_struct * info = tty->driver_data;
+ struct mgsl_icount cnow; /* kernel counter temps */
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+ return 0;
+}
+
+/* mgsl_ioctl() Service an IOCTL request
+ *
+ * Arguments:
+ *
+ * tty pointer to tty instance data
+ * cmd IOCTL command code
+ * arg command argument/context
+ *
+ * Return Value: 0 if success, otherwise error code
+ */
+static int mgsl_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct mgsl_struct * info = tty->driver_data;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_ioctl %s cmd=%08X\n", __FILE__,__LINE__,
+ info->device_name, cmd );
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_ioctl"))
+ return -ENODEV;
+
+ if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
+ (cmd != TIOCMIWAIT)) {
+ if (tty->flags & (1 << TTY_IO_ERROR))
+ return -EIO;
+ }
+
+ return mgsl_ioctl_common(info, cmd, arg);
+}
+
+static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+
+ switch (cmd) {
+ case MGSL_IOCGPARAMS:
+ return mgsl_get_params(info, argp);
+ case MGSL_IOCSPARAMS:
+ return mgsl_set_params(info, argp);
+ case MGSL_IOCGTXIDLE:
+ return mgsl_get_txidle(info, argp);
+ case MGSL_IOCSTXIDLE:
+ return mgsl_set_txidle(info,(int)arg);
+ case MGSL_IOCTXENABLE:
+ return mgsl_txenable(info,(int)arg);
+ case MGSL_IOCRXENABLE:
+ return mgsl_rxenable(info,(int)arg);
+ case MGSL_IOCTXABORT:
+ return mgsl_txabort(info);
+ case MGSL_IOCGSTATS:
+ return mgsl_get_stats(info, argp);
+ case MGSL_IOCWAITEVENT:
+ return mgsl_wait_event(info, argp);
+ case MGSL_IOCLOOPTXDONE:
+ return mgsl_loopmode_send_done(info);
+ /* Wait for modem input (DCD,RI,DSR,CTS) change
+ * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS)
+ */
+ case TIOCMIWAIT:
+ return modem_input_wait(info,(int)arg);
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+/* mgsl_set_termios()
+ *
+ * Set new termios settings
+ *
+ * Arguments:
+ *
+ * tty pointer to tty structure
+ * termios pointer to buffer to hold returned old termios
+ *
+ * Return Value: None
+ */
+static void mgsl_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+{
+ struct mgsl_struct *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_set_termios %s\n", __FILE__,__LINE__,
+ tty->driver->name );
+
+ mgsl_change_params(info);
+
+ /* Handle transition to B0 status */
+ if (old_termios->c_cflag & CBAUD &&
+ !(tty->termios->c_cflag & CBAUD)) {
+ info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_set_serial_signals(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ }
+
+ /* Handle transition away from B0 status */
+ if (!(old_termios->c_cflag & CBAUD) &&
+ tty->termios->c_cflag & CBAUD) {
+ info->serial_signals |= SerialSignal_DTR;
+ if (!(tty->termios->c_cflag & CRTSCTS) ||
+ !test_bit(TTY_THROTTLED, &tty->flags)) {
+ info->serial_signals |= SerialSignal_RTS;
+ }
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_set_serial_signals(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ }
+
+ /* Handle turning off CRTSCTS */
+ if (old_termios->c_cflag & CRTSCTS &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ mgsl_start(tty);
+ }
+
+} /* end of mgsl_set_termios() */
+
+/* mgsl_close()
+ *
+ * Called when port is closed. Wait for remaining data to be
+ * sent. Disable port and free resources.
+ *
+ * Arguments:
+ *
+ * tty pointer to open tty structure
+ * filp pointer to open file object
+ *
+ * Return Value: None
+ */
+static void mgsl_close(struct tty_struct *tty, struct file * filp)
+{
+ struct mgsl_struct * info = tty->driver_data;
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_close"))
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_close(%s) entry, count=%d\n",
+ __FILE__,__LINE__, info->device_name, info->port.count);
+
+ if (tty_port_close_start(&info->port, tty, filp) == 0)
+ goto cleanup;
+
+ mutex_lock(&info->port.mutex);
+ if (info->port.flags & ASYNC_INITIALIZED)
+ mgsl_wait_until_sent(tty, info->timeout);
+ mgsl_flush_buffer(tty);
+ tty_ldisc_flush(tty);
+ shutdown(info);
+ mutex_unlock(&info->port.mutex);
+
+ tty_port_close_end(&info->port, tty);
+ info->port.tty = NULL;
+cleanup:
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_close(%s) exit, count=%d\n", __FILE__,__LINE__,
+ tty->driver->name, info->port.count);
+
+} /* end of mgsl_close() */
+
+/* mgsl_wait_until_sent()
+ *
+ * Wait until the transmitter is empty.
+ *
+ * Arguments:
+ *
+ * tty pointer to tty info structure
+ * timeout time to wait for send completion
+ *
+ * Return Value: None
+ */
+static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ struct mgsl_struct * info = tty->driver_data;
+ unsigned long orig_jiffies, char_time;
+
+ if (!info )
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_wait_until_sent(%s) entry\n",
+ __FILE__,__LINE__, info->device_name );
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_wait_until_sent"))
+ return;
+
+ if (!(info->port.flags & ASYNC_INITIALIZED))
+ goto exit;
+
+ orig_jiffies = jiffies;
+
+ /* Set check interval to 1/5 of estimated time to
+ * send a character, and make it at least 1. The check
+ * interval should also be less than the timeout.
+ * Note: use tight timings here to satisfy the NIST-PCTS.
+ */
+
+ if ( info->params.data_rate ) {
+ char_time = info->timeout/(32 * 5);
+ if (!char_time)
+ char_time++;
+ } else
+ char_time = 1;
+
+ if (timeout)
+ char_time = min_t(unsigned long, char_time, timeout);
+
+ if ( info->params.mode == MGSL_MODE_HDLC ||
+ info->params.mode == MGSL_MODE_RAW ) {
+ while (info->tx_active) {
+ msleep_interruptible(jiffies_to_msecs(char_time));
+ if (signal_pending(current))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies + timeout))
+ break;
+ }
+ } else {
+ while (!(usc_InReg(info,TCSR) & TXSTATUS_ALL_SENT) &&
+ info->tx_enabled) {
+ msleep_interruptible(jiffies_to_msecs(char_time));
+ if (signal_pending(current))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies + timeout))
+ break;
+ }
+ }
+
+exit:
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_wait_until_sent(%s) exit\n",
+ __FILE__,__LINE__, info->device_name );
+
+} /* end of mgsl_wait_until_sent() */
+
+/* mgsl_hangup()
+ *
+ * Called by tty_hangup() when a hangup is signaled.
+ * This is the same as to closing all open files for the port.
+ *
+ * Arguments: tty pointer to associated tty object
+ * Return Value: None
+ */
+static void mgsl_hangup(struct tty_struct *tty)
+{
+ struct mgsl_struct * info = tty->driver_data;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_hangup(%s)\n",
+ __FILE__,__LINE__, info->device_name );
+
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_hangup"))
+ return;
+
+ mgsl_flush_buffer(tty);
+ shutdown(info);
+
+ info->port.count = 0;
+ info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
+ info->port.tty = NULL;
+
+ wake_up_interruptible(&info->port.open_wait);
+
+} /* end of mgsl_hangup() */
+
+/*
+ * carrier_raised()
+ *
+ * Return true if carrier is raised
+ */
+
+static int carrier_raised(struct tty_port *port)
+{
+ unsigned long flags;
+ struct mgsl_struct *info = container_of(port, struct mgsl_struct, port);
+
+ spin_lock_irqsave(&info->irq_spinlock, flags);
+ usc_get_serial_signals(info);
+ spin_unlock_irqrestore(&info->irq_spinlock, flags);
+ return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
+}
+
+static void dtr_rts(struct tty_port *port, int on)
+{
+ struct mgsl_struct *info = container_of(port, struct mgsl_struct, port);
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if (on)
+ info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+ else
+ info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+ usc_set_serial_signals(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+}
+
+
+/* block_til_ready()
+ *
+ * Block the current process until the specified port
+ * is ready to be opened.
+ *
+ * Arguments:
+ *
+ * tty pointer to tty info structure
+ * filp pointer to open file object
+ * info pointer to device instance data
+ *
+ * Return Value: 0 if success, otherwise error code
+ */
+static int block_til_ready(struct tty_struct *tty, struct file * filp,
+ struct mgsl_struct *info)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ int retval;
+ bool do_clocal = false;
+ bool extra_count = false;
+ unsigned long flags;
+ int dcd;
+ struct tty_port *port = &info->port;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):block_til_ready on %s\n",
+ __FILE__,__LINE__, tty->driver->name );
+
+ if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
+ /* nonblock mode is set or port is not enabled */
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+ }
+
+ if (tty->termios->c_cflag & CLOCAL)
+ do_clocal = true;
+
+ /* Wait for carrier detect and the line to become
+ * free (i.e., not in use by the callout). While we are in
+ * this loop, port->count is dropped by one, so that
+ * mgsl_close() knows when to free things. We restore it upon
+ * exit, either normal or abnormal.
+ */
+
+ retval = 0;
+ add_wait_queue(&port->open_wait, &wait);
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):block_til_ready before block on %s count=%d\n",
+ __FILE__,__LINE__, tty->driver->name, port->count );
+
+ spin_lock_irqsave(&info->irq_spinlock, flags);
+ if (!tty_hung_up_p(filp)) {
+ extra_count = true;
+ port->count--;
+ }
+ spin_unlock_irqrestore(&info->irq_spinlock, flags);
+ port->blocked_open++;
+
+ while (1) {
+ if (tty->termios->c_cflag & CBAUD)
+ tty_port_raise_dtr_rts(port);
+
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
+ retval = (port->flags & ASYNC_HUP_NOTIFY) ?
+ -EAGAIN : -ERESTARTSYS;
+ break;
+ }
+
+ dcd = tty_port_carrier_raised(&info->port);
+
+ if (!(port->flags & ASYNC_CLOSING) && (do_clocal || dcd))
+ break;
+
+ if (signal_pending(current)) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):block_til_ready blocking on %s count=%d\n",
+ __FILE__,__LINE__, tty->driver->name, port->count );
+
+ tty_unlock();
+ schedule();
+ tty_lock();
+ }
+
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&port->open_wait, &wait);
+
+ /* FIXME: Racy on hangup during close wait */
+ if (extra_count)
+ port->count++;
+ port->blocked_open--;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
+ __FILE__,__LINE__, tty->driver->name, port->count );
+
+ if (!retval)
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+
+ return retval;
+
+} /* end of block_til_ready() */
+
+/* mgsl_open()
+ *
+ * Called when a port is opened. Init and enable port.
+ * Perform serial-specific initialization for the tty structure.
+ *
+ * Arguments: tty pointer to tty info structure
+ * filp associated file pointer
+ *
+ * Return Value: 0 if success, otherwise error code
+ */
+static int mgsl_open(struct tty_struct *tty, struct file * filp)
+{
+ struct mgsl_struct *info;
+ int retval, line;
+ unsigned long flags;
+
+ /* verify range of specified line number */
+ line = tty->index;
+ if ((line < 0) || (line >= mgsl_device_count)) {
+ printk("%s(%d):mgsl_open with invalid line #%d.\n",
+ __FILE__,__LINE__,line);
+ return -ENODEV;
+ }
+
+ /* find the info structure for the specified line */
+ info = mgsl_device_list;
+ while(info && info->line != line)
+ info = info->next_device;
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_open"))
+ return -ENODEV;
+
+ tty->driver_data = info;
+ info->port.tty = tty;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_open(%s), old ref count = %d\n",
+ __FILE__,__LINE__,tty->driver->name, info->port.count);
+
+ /* If port is closing, signal caller to try again */
+ if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
+ if (info->port.flags & ASYNC_CLOSING)
+ interruptible_sleep_on(&info->port.close_wait);
+ retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
+ -EAGAIN : -ERESTARTSYS);
+ goto cleanup;
+ }
+
+ info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+
+ spin_lock_irqsave(&info->netlock, flags);
+ if (info->netcount) {
+ retval = -EBUSY;
+ spin_unlock_irqrestore(&info->netlock, flags);
+ goto cleanup;
+ }
+ info->port.count++;
+ spin_unlock_irqrestore(&info->netlock, flags);
+
+ if (info->port.count == 1) {
+ /* 1st open on this device, init hardware */
+ retval = startup(info);
+ if (retval < 0)
+ goto cleanup;
+ }
+
+ retval = block_til_ready(tty, filp, info);
+ if (retval) {
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):block_til_ready(%s) returned %d\n",
+ __FILE__,__LINE__, info->device_name, retval);
+ goto cleanup;
+ }
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgsl_open(%s) success\n",
+ __FILE__,__LINE__, info->device_name);
+ retval = 0;
+
+cleanup:
+ if (retval) {
+ if (tty->count == 1)
+ info->port.tty = NULL; /* tty layer will release tty struct */
+ if(info->port.count)
+ info->port.count--;
+ }
+
+ return retval;
+
+} /* end of mgsl_open() */
+
+/*
+ * /proc fs routines....
+ */
+
+static inline void line_info(struct seq_file *m, struct mgsl_struct *info)
+{
+ char stat_buf[30];
+ unsigned long flags;
+
+ if (info->bus_type == MGSL_BUS_TYPE_PCI) {
+ seq_printf(m, "%s:PCI io:%04X irq:%d mem:%08X lcr:%08X",
+ info->device_name, info->io_base, info->irq_level,
+ info->phys_memory_base, info->phys_lcr_base);
+ } else {
+ seq_printf(m, "%s:(E)ISA io:%04X irq:%d dma:%d",
+ info->device_name, info->io_base,
+ info->irq_level, info->dma_level);
+ }
+
+ /* output current serial signal states */
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_get_serial_signals(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ stat_buf[0] = 0;
+ stat_buf[1] = 0;
+ if (info->serial_signals & SerialSignal_RTS)
+ strcat(stat_buf, "|RTS");
+ if (info->serial_signals & SerialSignal_CTS)
+ strcat(stat_buf, "|CTS");
+ if (info->serial_signals & SerialSignal_DTR)
+ strcat(stat_buf, "|DTR");
+ if (info->serial_signals & SerialSignal_DSR)
+ strcat(stat_buf, "|DSR");
+ if (info->serial_signals & SerialSignal_DCD)
+ strcat(stat_buf, "|CD");
+ if (info->serial_signals & SerialSignal_RI)
+ strcat(stat_buf, "|RI");
+
+ if (info->params.mode == MGSL_MODE_HDLC ||
+ info->params.mode == MGSL_MODE_RAW ) {
+ seq_printf(m, " HDLC txok:%d rxok:%d",
+ info->icount.txok, info->icount.rxok);
+ if (info->icount.txunder)
+ seq_printf(m, " txunder:%d", info->icount.txunder);
+ if (info->icount.txabort)
+ seq_printf(m, " txabort:%d", info->icount.txabort);
+ if (info->icount.rxshort)
+ seq_printf(m, " rxshort:%d", info->icount.rxshort);
+ if (info->icount.rxlong)
+ seq_printf(m, " rxlong:%d", info->icount.rxlong);
+ if (info->icount.rxover)
+ seq_printf(m, " rxover:%d", info->icount.rxover);
+ if (info->icount.rxcrc)
+ seq_printf(m, " rxcrc:%d", info->icount.rxcrc);
+ } else {
+ seq_printf(m, " ASYNC tx:%d rx:%d",
+ info->icount.tx, info->icount.rx);
+ if (info->icount.frame)
+ seq_printf(m, " fe:%d", info->icount.frame);
+ if (info->icount.parity)
+ seq_printf(m, " pe:%d", info->icount.parity);
+ if (info->icount.brk)
+ seq_printf(m, " brk:%d", info->icount.brk);
+ if (info->icount.overrun)
+ seq_printf(m, " oe:%d", info->icount.overrun);
+ }
+
+ /* Append serial signal status to end */
+ seq_printf(m, " %s\n", stat_buf+1);
+
+ seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
+ info->tx_active,info->bh_requested,info->bh_running,
+ info->pending_bh);
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ {
+ u16 Tcsr = usc_InReg( info, TCSR );
+ u16 Tdmr = usc_InDmaReg( info, TDMR );
+ u16 Ticr = usc_InReg( info, TICR );
+ u16 Rscr = usc_InReg( info, RCSR );
+ u16 Rdmr = usc_InDmaReg( info, RDMR );
+ u16 Ricr = usc_InReg( info, RICR );
+ u16 Icr = usc_InReg( info, ICR );
+ u16 Dccr = usc_InReg( info, DCCR );
+ u16 Tmr = usc_InReg( info, TMR );
+ u16 Tccr = usc_InReg( info, TCCR );
+ u16 Ccar = inw( info->io_base + CCAR );
+ seq_printf(m, "tcsr=%04X tdmr=%04X ticr=%04X rcsr=%04X rdmr=%04X\n"
+ "ricr=%04X icr =%04X dccr=%04X tmr=%04X tccr=%04X ccar=%04X\n",
+ Tcsr,Tdmr,Ticr,Rscr,Rdmr,Ricr,Icr,Dccr,Tmr,Tccr,Ccar );
+ }
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+}
+
+/* Called to print information about devices */
+static int mgsl_proc_show(struct seq_file *m, void *v)
+{
+ struct mgsl_struct *info;
+
+ seq_printf(m, "synclink driver:%s\n", driver_version);
+
+ info = mgsl_device_list;
+ while( info ) {
+ line_info(m, info);
+ info = info->next_device;
+ }
+ return 0;
+}
+
+static int mgsl_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mgsl_proc_show, NULL);
+}
+
+static const struct file_operations mgsl_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = mgsl_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/* mgsl_allocate_dma_buffers()
+ *
+ * Allocate and format DMA buffers (ISA adapter)
+ * or format shared memory buffers (PCI adapter).
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: 0 if success, otherwise error
+ */
+static int mgsl_allocate_dma_buffers(struct mgsl_struct *info)
+{
+ unsigned short BuffersPerFrame;
+
+ info->last_mem_alloc = 0;
+
+ /* Calculate the number of DMA buffers necessary to hold the */
+ /* largest allowable frame size. Note: If the max frame size is */
+ /* not an even multiple of the DMA buffer size then we need to */
+ /* round the buffer count per frame up one. */
+
+ BuffersPerFrame = (unsigned short)(info->max_frame_size/DMABUFFERSIZE);
+ if ( info->max_frame_size % DMABUFFERSIZE )
+ BuffersPerFrame++;
+
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
+ /*
+ * The PCI adapter has 256KBytes of shared memory to use.
+ * This is 64 PAGE_SIZE buffers.
+ *
+ * The first page is used for padding at this time so the
+ * buffer list does not begin at offset 0 of the PCI
+ * adapter's shared memory.
+ *
+ * The 2nd page is used for the buffer list. A 4K buffer
+ * list can hold 128 DMA_BUFFER structures at 32 bytes
+ * each.
+ *
+ * This leaves 62 4K pages.
+ *
+ * The next N pages are used for transmit frame(s). We
+ * reserve enough 4K page blocks to hold the required
+ * number of transmit dma buffers (num_tx_dma_buffers),
+ * each of MaxFrameSize size.
+ *
+ * Of the remaining pages (62-N), determine how many can
+ * be used to receive full MaxFrameSize inbound frames
+ */
+ info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame;
+ info->rx_buffer_count = 62 - info->tx_buffer_count;
+ } else {
+ /* Calculate the number of PAGE_SIZE buffers needed for */
+ /* receive and transmit DMA buffers. */
+
+
+ /* Calculate the number of DMA buffers necessary to */
+ /* hold 7 max size receive frames and one max size transmit frame. */
+ /* The receive buffer count is bumped by one so we avoid an */
+ /* End of List condition if all receive buffers are used when */
+ /* using linked list DMA buffers. */
+
+ info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame;
+ info->rx_buffer_count = (BuffersPerFrame * MAXRXFRAMES) + 6;
+
+ /*
+ * limit total TxBuffers & RxBuffers to 62 4K total
+ * (ala PCI Allocation)
+ */
+
+ if ( (info->tx_buffer_count + info->rx_buffer_count) > 62 )
+ info->rx_buffer_count = 62 - info->tx_buffer_count;
+
+ }
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk("%s(%d):Allocating %d TX and %d RX DMA buffers.\n",
+ __FILE__,__LINE__, info->tx_buffer_count,info->rx_buffer_count);
+
+ if ( mgsl_alloc_buffer_list_memory( info ) < 0 ||
+ mgsl_alloc_frame_memory(info, info->rx_buffer_list, info->rx_buffer_count) < 0 ||
+ mgsl_alloc_frame_memory(info, info->tx_buffer_list, info->tx_buffer_count) < 0 ||
+ mgsl_alloc_intermediate_rxbuffer_memory(info) < 0 ||
+ mgsl_alloc_intermediate_txbuffer_memory(info) < 0 ) {
+ printk("%s(%d):Can't allocate DMA buffer memory\n",__FILE__,__LINE__);
+ return -ENOMEM;
+ }
+
+ mgsl_reset_rx_dma_buffers( info );
+ mgsl_reset_tx_dma_buffers( info );
+
+ return 0;
+
+} /* end of mgsl_allocate_dma_buffers() */
+
+/*
+ * mgsl_alloc_buffer_list_memory()
+ *
+ * Allocate a common DMA buffer for use as the
+ * receive and transmit buffer lists.
+ *
+ * A buffer list is a set of buffer entries where each entry contains
+ * a pointer to an actual buffer and a pointer to the next buffer entry
+ * (plus some other info about the buffer).
+ *
+ * The buffer entries for a list are built to form a circular list so
+ * that when the entire list has been traversed you start back at the
+ * beginning.
+ *
+ * This function allocates memory for just the buffer entries.
+ * The links (pointer to next entry) are filled in with the physical
+ * address of the next entry so the adapter can navigate the list
+ * using bus master DMA. The pointers to the actual buffers are filled
+ * out later when the actual buffers are allocated.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: 0 if success, otherwise error
+ */
+static int mgsl_alloc_buffer_list_memory( struct mgsl_struct *info )
+{
+ unsigned int i;
+
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
+ /* PCI adapter uses shared memory. */
+ info->buffer_list = info->memory_base + info->last_mem_alloc;
+ info->buffer_list_phys = info->last_mem_alloc;
+ info->last_mem_alloc += BUFFERLISTSIZE;
+ } else {
+ /* ISA adapter uses system memory. */
+ /* The buffer lists are allocated as a common buffer that both */
+ /* the processor and adapter can access. This allows the driver to */
+ /* inspect portions of the buffer while other portions are being */
+ /* updated by the adapter using Bus Master DMA. */
+
+ info->buffer_list = dma_alloc_coherent(NULL, BUFFERLISTSIZE, &info->buffer_list_dma_addr, GFP_KERNEL);
+ if (info->buffer_list == NULL)
+ return -ENOMEM;
+ info->buffer_list_phys = (u32)(info->buffer_list_dma_addr);
+ }
+
+ /* We got the memory for the buffer entry lists. */
+ /* Initialize the memory block to all zeros. */
+ memset( info->buffer_list, 0, BUFFERLISTSIZE );
+
+ /* Save virtual address pointers to the receive and */
+ /* transmit buffer lists. (Receive 1st). These pointers will */
+ /* be used by the processor to access the lists. */
+ info->rx_buffer_list = (DMABUFFERENTRY *)info->buffer_list;
+ info->tx_buffer_list = (DMABUFFERENTRY *)info->buffer_list;
+ info->tx_buffer_list += info->rx_buffer_count;
+
+ /*
+ * Build the links for the buffer entry lists such that
+ * two circular lists are built. (Transmit and Receive).
+ *
+ * Note: the links are physical addresses
+ * which are read by the adapter to determine the next
+ * buffer entry to use.
+ */
+
+ for ( i = 0; i < info->rx_buffer_count; i++ ) {
+ /* calculate and store physical address of this buffer entry */
+ info->rx_buffer_list[i].phys_entry =
+ info->buffer_list_phys + (i * sizeof(DMABUFFERENTRY));
+
+ /* calculate and store physical address of */
+ /* next entry in cirular list of entries */
+
+ info->rx_buffer_list[i].link = info->buffer_list_phys;
+
+ if ( i < info->rx_buffer_count - 1 )
+ info->rx_buffer_list[i].link += (i + 1) * sizeof(DMABUFFERENTRY);
+ }
+
+ for ( i = 0; i < info->tx_buffer_count; i++ ) {
+ /* calculate and store physical address of this buffer entry */
+ info->tx_buffer_list[i].phys_entry = info->buffer_list_phys +
+ ((info->rx_buffer_count + i) * sizeof(DMABUFFERENTRY));
+
+ /* calculate and store physical address of */
+ /* next entry in cirular list of entries */
+
+ info->tx_buffer_list[i].link = info->buffer_list_phys +
+ info->rx_buffer_count * sizeof(DMABUFFERENTRY);
+
+ if ( i < info->tx_buffer_count - 1 )
+ info->tx_buffer_list[i].link += (i + 1) * sizeof(DMABUFFERENTRY);
+ }
+
+ return 0;
+
+} /* end of mgsl_alloc_buffer_list_memory() */
+
+/* Free DMA buffers allocated for use as the
+ * receive and transmit buffer lists.
+ * Warning:
+ *
+ * The data transfer buffers associated with the buffer list
+ * MUST be freed before freeing the buffer list itself because
+ * the buffer list contains the information necessary to free
+ * the individual buffers!
+ */
+static void mgsl_free_buffer_list_memory( struct mgsl_struct *info )
+{
+ if (info->buffer_list && info->bus_type != MGSL_BUS_TYPE_PCI)
+ dma_free_coherent(NULL, BUFFERLISTSIZE, info->buffer_list, info->buffer_list_dma_addr);
+
+ info->buffer_list = NULL;
+ info->rx_buffer_list = NULL;
+ info->tx_buffer_list = NULL;
+
+} /* end of mgsl_free_buffer_list_memory() */
+
+/*
+ * mgsl_alloc_frame_memory()
+ *
+ * Allocate the frame DMA buffers used by the specified buffer list.
+ * Each DMA buffer will be one memory page in size. This is necessary
+ * because memory can fragment enough that it may be impossible
+ * contiguous pages.
+ *
+ * Arguments:
+ *
+ * info pointer to device instance data
+ * BufferList pointer to list of buffer entries
+ * Buffercount count of buffer entries in buffer list
+ *
+ * Return Value: 0 if success, otherwise -ENOMEM
+ */
+static int mgsl_alloc_frame_memory(struct mgsl_struct *info,DMABUFFERENTRY *BufferList,int Buffercount)
+{
+ int i;
+ u32 phys_addr;
+
+ /* Allocate page sized buffers for the receive buffer list */
+
+ for ( i = 0; i < Buffercount; i++ ) {
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
+ /* PCI adapter uses shared memory buffers. */
+ BufferList[i].virt_addr = info->memory_base + info->last_mem_alloc;
+ phys_addr = info->last_mem_alloc;
+ info->last_mem_alloc += DMABUFFERSIZE;
+ } else {
+ /* ISA adapter uses system memory. */
+ BufferList[i].virt_addr = dma_alloc_coherent(NULL, DMABUFFERSIZE, &BufferList[i].dma_addr, GFP_KERNEL);
+ if (BufferList[i].virt_addr == NULL)
+ return -ENOMEM;
+ phys_addr = (u32)(BufferList[i].dma_addr);
+ }
+ BufferList[i].phys_addr = phys_addr;
+ }
+
+ return 0;
+
+} /* end of mgsl_alloc_frame_memory() */
+
+/*
+ * mgsl_free_frame_memory()
+ *
+ * Free the buffers associated with
+ * each buffer entry of a buffer list.
+ *
+ * Arguments:
+ *
+ * info pointer to device instance data
+ * BufferList pointer to list of buffer entries
+ * Buffercount count of buffer entries in buffer list
+ *
+ * Return Value: None
+ */
+static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList, int Buffercount)
+{
+ int i;
+
+ if ( BufferList ) {
+ for ( i = 0 ; i < Buffercount ; i++ ) {
+ if ( BufferList[i].virt_addr ) {
+ if ( info->bus_type != MGSL_BUS_TYPE_PCI )
+ dma_free_coherent(NULL, DMABUFFERSIZE, BufferList[i].virt_addr, BufferList[i].dma_addr);
+ BufferList[i].virt_addr = NULL;
+ }
+ }
+ }
+
+} /* end of mgsl_free_frame_memory() */
+
+/* mgsl_free_dma_buffers()
+ *
+ * Free DMA buffers
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void mgsl_free_dma_buffers( struct mgsl_struct *info )
+{
+ mgsl_free_frame_memory( info, info->rx_buffer_list, info->rx_buffer_count );
+ mgsl_free_frame_memory( info, info->tx_buffer_list, info->tx_buffer_count );
+ mgsl_free_buffer_list_memory( info );
+
+} /* end of mgsl_free_dma_buffers() */
+
+
+/*
+ * mgsl_alloc_intermediate_rxbuffer_memory()
+ *
+ * Allocate a buffer large enough to hold max_frame_size. This buffer
+ * is used to pass an assembled frame to the line discipline.
+ *
+ * Arguments:
+ *
+ * info pointer to device instance data
+ *
+ * Return Value: 0 if success, otherwise -ENOMEM
+ */
+static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info)
+{
+ info->intermediate_rxbuffer = kmalloc(info->max_frame_size, GFP_KERNEL | GFP_DMA);
+ if ( info->intermediate_rxbuffer == NULL )
+ return -ENOMEM;
+
+ return 0;
+
+} /* end of mgsl_alloc_intermediate_rxbuffer_memory() */
+
+/*
+ * mgsl_free_intermediate_rxbuffer_memory()
+ *
+ *
+ * Arguments:
+ *
+ * info pointer to device instance data
+ *
+ * Return Value: None
+ */
+static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info)
+{
+ kfree(info->intermediate_rxbuffer);
+ info->intermediate_rxbuffer = NULL;
+
+} /* end of mgsl_free_intermediate_rxbuffer_memory() */
+
+/*
+ * mgsl_alloc_intermediate_txbuffer_memory()
+ *
+ * Allocate intermdiate transmit buffer(s) large enough to hold max_frame_size.
+ * This buffer is used to load transmit frames into the adapter's dma transfer
+ * buffers when there is sufficient space.
+ *
+ * Arguments:
+ *
+ * info pointer to device instance data
+ *
+ * Return Value: 0 if success, otherwise -ENOMEM
+ */
+static int mgsl_alloc_intermediate_txbuffer_memory(struct mgsl_struct *info)
+{
+ int i;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk("%s %s(%d) allocating %d tx holding buffers\n",
+ info->device_name, __FILE__,__LINE__,info->num_tx_holding_buffers);
+
+ memset(info->tx_holding_buffers,0,sizeof(info->tx_holding_buffers));
+
+ for ( i=0; i<info->num_tx_holding_buffers; ++i) {
+ info->tx_holding_buffers[i].buffer =
+ kmalloc(info->max_frame_size, GFP_KERNEL);
+ if (info->tx_holding_buffers[i].buffer == NULL) {
+ for (--i; i >= 0; i--) {
+ kfree(info->tx_holding_buffers[i].buffer);
+ info->tx_holding_buffers[i].buffer = NULL;
+ }
+ return -ENOMEM;
+ }
+ }
+
+ return 0;
+
+} /* end of mgsl_alloc_intermediate_txbuffer_memory() */
+
+/*
+ * mgsl_free_intermediate_txbuffer_memory()
+ *
+ *
+ * Arguments:
+ *
+ * info pointer to device instance data
+ *
+ * Return Value: None
+ */
+static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info)
+{
+ int i;
+
+ for ( i=0; i<info->num_tx_holding_buffers; ++i ) {
+ kfree(info->tx_holding_buffers[i].buffer);
+ info->tx_holding_buffers[i].buffer = NULL;
+ }
+
+ info->get_tx_holding_index = 0;
+ info->put_tx_holding_index = 0;
+ info->tx_holding_count = 0;
+
+} /* end of mgsl_free_intermediate_txbuffer_memory() */
+
+
+/*
+ * load_next_tx_holding_buffer()
+ *
+ * attempts to load the next buffered tx request into the
+ * tx dma buffers
+ *
+ * Arguments:
+ *
+ * info pointer to device instance data
+ *
+ * Return Value: true if next buffered tx request loaded
+ * into adapter's tx dma buffer,
+ * false otherwise
+ */
+static bool load_next_tx_holding_buffer(struct mgsl_struct *info)
+{
+ bool ret = false;
+
+ if ( info->tx_holding_count ) {
+ /* determine if we have enough tx dma buffers
+ * to accommodate the next tx frame
+ */
+ struct tx_holding_buffer *ptx =
+ &info->tx_holding_buffers[info->get_tx_holding_index];
+ int num_free = num_free_tx_dma_buffers(info);
+ int num_needed = ptx->buffer_size / DMABUFFERSIZE;
+ if ( ptx->buffer_size % DMABUFFERSIZE )
+ ++num_needed;
+
+ if (num_needed <= num_free) {
+ info->xmit_cnt = ptx->buffer_size;
+ mgsl_load_tx_dma_buffer(info,ptx->buffer,ptx->buffer_size);
+
+ --info->tx_holding_count;
+ if ( ++info->get_tx_holding_index >= info->num_tx_holding_buffers)
+ info->get_tx_holding_index=0;
+
+ /* restart transmit timer */
+ mod_timer(&info->tx_timer, jiffies + msecs_to_jiffies(5000));
+
+ ret = true;
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * save_tx_buffer_request()
+ *
+ * attempt to store transmit frame request for later transmission
+ *
+ * Arguments:
+ *
+ * info pointer to device instance data
+ * Buffer pointer to buffer containing frame to load
+ * BufferSize size in bytes of frame in Buffer
+ *
+ * Return Value: 1 if able to store, 0 otherwise
+ */
+static int save_tx_buffer_request(struct mgsl_struct *info,const char *Buffer, unsigned int BufferSize)
+{
+ struct tx_holding_buffer *ptx;
+
+ if ( info->tx_holding_count >= info->num_tx_holding_buffers ) {
+ return 0; /* all buffers in use */
+ }
+
+ ptx = &info->tx_holding_buffers[info->put_tx_holding_index];
+ ptx->buffer_size = BufferSize;
+ memcpy( ptx->buffer, Buffer, BufferSize);
+
+ ++info->tx_holding_count;
+ if ( ++info->put_tx_holding_index >= info->num_tx_holding_buffers)
+ info->put_tx_holding_index=0;
+
+ return 1;
+}
+
+static int mgsl_claim_resources(struct mgsl_struct *info)
+{
+ if (request_region(info->io_base,info->io_addr_size,"synclink") == NULL) {
+ printk( "%s(%d):I/O address conflict on device %s Addr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->io_base);
+ return -ENODEV;
+ }
+ info->io_addr_requested = true;
+
+ if ( request_irq(info->irq_level,mgsl_interrupt,info->irq_flags,
+ info->device_name, info ) < 0 ) {
+ printk( "%s(%d):Cant request interrupt on device %s IRQ=%d\n",
+ __FILE__,__LINE__,info->device_name, info->irq_level );
+ goto errout;
+ }
+ info->irq_requested = true;
+
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
+ if (request_mem_region(info->phys_memory_base,0x40000,"synclink") == NULL) {
+ printk( "%s(%d):mem addr conflict device %s Addr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_memory_base);
+ goto errout;
+ }
+ info->shared_mem_requested = true;
+ if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclink") == NULL) {
+ printk( "%s(%d):lcr mem addr conflict device %s Addr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_lcr_base + info->lcr_offset);
+ goto errout;
+ }
+ info->lcr_mem_requested = true;
+
+ info->memory_base = ioremap_nocache(info->phys_memory_base,
+ 0x40000);
+ if (!info->memory_base) {
+ printk( "%s(%d):Cant map shared memory on device %s MemAddr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_memory_base );
+ goto errout;
+ }
+
+ if ( !mgsl_memory_test(info) ) {
+ printk( "%s(%d):Failed shared memory test %s MemAddr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_memory_base );
+ goto errout;
+ }
+
+ info->lcr_base = ioremap_nocache(info->phys_lcr_base,
+ PAGE_SIZE);
+ if (!info->lcr_base) {
+ printk( "%s(%d):Cant map LCR memory on device %s MemAddr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_lcr_base );
+ goto errout;
+ }
+ info->lcr_base += info->lcr_offset;
+
+ } else {
+ /* claim DMA channel */
+
+ if (request_dma(info->dma_level,info->device_name) < 0){
+ printk( "%s(%d):Cant request DMA channel on device %s DMA=%d\n",
+ __FILE__,__LINE__,info->device_name, info->dma_level );
+ mgsl_release_resources( info );
+ return -ENODEV;
+ }
+ info->dma_requested = true;
+
+ /* ISA adapter uses bus master DMA */
+ set_dma_mode(info->dma_level,DMA_MODE_CASCADE);
+ enable_dma(info->dma_level);
+ }
+
+ if ( mgsl_allocate_dma_buffers(info) < 0 ) {
+ printk( "%s(%d):Cant allocate DMA buffers on device %s DMA=%d\n",
+ __FILE__,__LINE__,info->device_name, info->dma_level );
+ goto errout;
+ }
+
+ return 0;
+errout:
+ mgsl_release_resources(info);
+ return -ENODEV;
+
+} /* end of mgsl_claim_resources() */
+
+static void mgsl_release_resources(struct mgsl_struct *info)
+{
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):mgsl_release_resources(%s) entry\n",
+ __FILE__,__LINE__,info->device_name );
+
+ if ( info->irq_requested ) {
+ free_irq(info->irq_level, info);
+ info->irq_requested = false;
+ }
+ if ( info->dma_requested ) {
+ disable_dma(info->dma_level);
+ free_dma(info->dma_level);
+ info->dma_requested = false;
+ }
+ mgsl_free_dma_buffers(info);
+ mgsl_free_intermediate_rxbuffer_memory(info);
+ mgsl_free_intermediate_txbuffer_memory(info);
+
+ if ( info->io_addr_requested ) {
+ release_region(info->io_base,info->io_addr_size);
+ info->io_addr_requested = false;
+ }
+ if ( info->shared_mem_requested ) {
+ release_mem_region(info->phys_memory_base,0x40000);
+ info->shared_mem_requested = false;
+ }
+ if ( info->lcr_mem_requested ) {
+ release_mem_region(info->phys_lcr_base + info->lcr_offset,128);
+ info->lcr_mem_requested = false;
+ }
+ if (info->memory_base){
+ iounmap(info->memory_base);
+ info->memory_base = NULL;
+ }
+ if (info->lcr_base){
+ iounmap(info->lcr_base - info->lcr_offset);
+ info->lcr_base = NULL;
+ }
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):mgsl_release_resources(%s) exit\n",
+ __FILE__,__LINE__,info->device_name );
+
+} /* end of mgsl_release_resources() */
+
+/* mgsl_add_device()
+ *
+ * Add the specified device instance data structure to the
+ * global linked list of devices and increment the device count.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void mgsl_add_device( struct mgsl_struct *info )
+{
+ info->next_device = NULL;
+ info->line = mgsl_device_count;
+ sprintf(info->device_name,"ttySL%d",info->line);
+
+ if (info->line < MAX_TOTAL_DEVICES) {
+ if (maxframe[info->line])
+ info->max_frame_size = maxframe[info->line];
+
+ if (txdmabufs[info->line]) {
+ info->num_tx_dma_buffers = txdmabufs[info->line];
+ if (info->num_tx_dma_buffers < 1)
+ info->num_tx_dma_buffers = 1;
+ }
+
+ if (txholdbufs[info->line]) {
+ info->num_tx_holding_buffers = txholdbufs[info->line];
+ if (info->num_tx_holding_buffers < 1)
+ info->num_tx_holding_buffers = 1;
+ else if (info->num_tx_holding_buffers > MAX_TX_HOLDING_BUFFERS)
+ info->num_tx_holding_buffers = MAX_TX_HOLDING_BUFFERS;
+ }
+ }
+
+ mgsl_device_count++;
+
+ if ( !mgsl_device_list )
+ mgsl_device_list = info;
+ else {
+ struct mgsl_struct *current_dev = mgsl_device_list;
+ while( current_dev->next_device )
+ current_dev = current_dev->next_device;
+ current_dev->next_device = info;
+ }
+
+ if ( info->max_frame_size < 4096 )
+ info->max_frame_size = 4096;
+ else if ( info->max_frame_size > 65535 )
+ info->max_frame_size = 65535;
+
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
+ printk( "SyncLink PCI v%d %s: IO=%04X IRQ=%d Mem=%08X,%08X MaxFrameSize=%u\n",
+ info->hw_version + 1, info->device_name, info->io_base, info->irq_level,
+ info->phys_memory_base, info->phys_lcr_base,
+ info->max_frame_size );
+ } else {
+ printk( "SyncLink ISA %s: IO=%04X IRQ=%d DMA=%d MaxFrameSize=%u\n",
+ info->device_name, info->io_base, info->irq_level, info->dma_level,
+ info->max_frame_size );
+ }
+
+#if SYNCLINK_GENERIC_HDLC
+ hdlcdev_init(info);
+#endif
+
+} /* end of mgsl_add_device() */
+
+static const struct tty_port_operations mgsl_port_ops = {
+ .carrier_raised = carrier_raised,
+ .dtr_rts = dtr_rts,
+};
+
+
+/* mgsl_allocate_device()
+ *
+ * Allocate and initialize a device instance structure
+ *
+ * Arguments: none
+ * Return Value: pointer to mgsl_struct if success, otherwise NULL
+ */
+static struct mgsl_struct* mgsl_allocate_device(void)
+{
+ struct mgsl_struct *info;
+
+ info = kzalloc(sizeof(struct mgsl_struct),
+ GFP_KERNEL);
+
+ if (!info) {
+ printk("Error can't allocate device instance data\n");
+ } else {
+ tty_port_init(&info->port);
+ info->port.ops = &mgsl_port_ops;
+ info->magic = MGSL_MAGIC;
+ INIT_WORK(&info->task, mgsl_bh_handler);
+ info->max_frame_size = 4096;
+ info->port.close_delay = 5*HZ/10;
+ info->port.closing_wait = 30*HZ;
+ init_waitqueue_head(&info->status_event_wait_q);
+ init_waitqueue_head(&info->event_wait_q);
+ spin_lock_init(&info->irq_spinlock);
+ spin_lock_init(&info->netlock);
+ memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
+ info->idle_mode = HDLC_TXIDLE_FLAGS;
+ info->num_tx_dma_buffers = 1;
+ info->num_tx_holding_buffers = 0;
+ }
+
+ return info;
+
+} /* end of mgsl_allocate_device()*/
+
+static const struct tty_operations mgsl_ops = {
+ .open = mgsl_open,
+ .close = mgsl_close,
+ .write = mgsl_write,
+ .put_char = mgsl_put_char,
+ .flush_chars = mgsl_flush_chars,
+ .write_room = mgsl_write_room,
+ .chars_in_buffer = mgsl_chars_in_buffer,
+ .flush_buffer = mgsl_flush_buffer,
+ .ioctl = mgsl_ioctl,
+ .throttle = mgsl_throttle,
+ .unthrottle = mgsl_unthrottle,
+ .send_xchar = mgsl_send_xchar,
+ .break_ctl = mgsl_break,
+ .wait_until_sent = mgsl_wait_until_sent,
+ .set_termios = mgsl_set_termios,
+ .stop = mgsl_stop,
+ .start = mgsl_start,
+ .hangup = mgsl_hangup,
+ .tiocmget = tiocmget,
+ .tiocmset = tiocmset,
+ .get_icount = msgl_get_icount,
+ .proc_fops = &mgsl_proc_fops,
+};
+
+/*
+ * perform tty device initialization
+ */
+static int mgsl_init_tty(void)
+{
+ int rc;
+
+ serial_driver = alloc_tty_driver(128);
+ if (!serial_driver)
+ return -ENOMEM;
+
+ serial_driver->owner = THIS_MODULE;
+ serial_driver->driver_name = "synclink";
+ serial_driver->name = "ttySL";
+ serial_driver->major = ttymajor;
+ serial_driver->minor_start = 64;
+ serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ serial_driver->subtype = SERIAL_TYPE_NORMAL;
+ serial_driver->init_termios = tty_std_termios;
+ serial_driver->init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ serial_driver->init_termios.c_ispeed = 9600;
+ serial_driver->init_termios.c_ospeed = 9600;
+ serial_driver->flags = TTY_DRIVER_REAL_RAW;
+ tty_set_operations(serial_driver, &mgsl_ops);
+ if ((rc = tty_register_driver(serial_driver)) < 0) {
+ printk("%s(%d):Couldn't register serial driver\n",
+ __FILE__,__LINE__);
+ put_tty_driver(serial_driver);
+ serial_driver = NULL;
+ return rc;
+ }
+
+ printk("%s %s, tty major#%d\n",
+ driver_name, driver_version,
+ serial_driver->major);
+ return 0;
+}
+
+/* enumerate user specified ISA adapters
+ */
+static void mgsl_enum_isa_devices(void)
+{
+ struct mgsl_struct *info;
+ int i;
+
+ /* Check for user specified ISA devices */
+
+ for (i=0 ;(i < MAX_ISA_DEVICES) && io[i] && irq[i]; i++){
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk("ISA device specified io=%04X,irq=%d,dma=%d\n",
+ io[i], irq[i], dma[i] );
+
+ info = mgsl_allocate_device();
+ if ( !info ) {
+ /* error allocating device instance data */
+ if ( debug_level >= DEBUG_LEVEL_ERROR )
+ printk( "can't allocate device instance data.\n");
+ continue;
+ }
+
+ /* Copy user configuration info to device instance data */
+ info->io_base = (unsigned int)io[i];
+ info->irq_level = (unsigned int)irq[i];
+ info->irq_level = irq_canonicalize(info->irq_level);
+ info->dma_level = (unsigned int)dma[i];
+ info->bus_type = MGSL_BUS_TYPE_ISA;
+ info->io_addr_size = 16;
+ info->irq_flags = 0;
+
+ mgsl_add_device( info );
+ }
+}
+
+static void synclink_cleanup(void)
+{
+ int rc;
+ struct mgsl_struct *info;
+ struct mgsl_struct *tmp;
+
+ printk("Unloading %s: %s\n", driver_name, driver_version);
+
+ if (serial_driver) {
+ if ((rc = tty_unregister_driver(serial_driver)))
+ printk("%s(%d) failed to unregister tty driver err=%d\n",
+ __FILE__,__LINE__,rc);
+ put_tty_driver(serial_driver);
+ }
+
+ info = mgsl_device_list;
+ while(info) {
+#if SYNCLINK_GENERIC_HDLC
+ hdlcdev_exit(info);
+#endif
+ mgsl_release_resources(info);
+ tmp = info;
+ info = info->next_device;
+ kfree(tmp);
+ }
+
+ if (pci_registered)
+ pci_unregister_driver(&synclink_pci_driver);
+}
+
+static int __init synclink_init(void)
+{
+ int rc;
+
+ if (break_on_load) {
+ mgsl_get_text_ptr();
+ BREAKPOINT();
+ }
+
+ printk("%s %s\n", driver_name, driver_version);
+
+ mgsl_enum_isa_devices();
+ if ((rc = pci_register_driver(&synclink_pci_driver)) < 0)
+ printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc);
+ else
+ pci_registered = true;
+
+ if ((rc = mgsl_init_tty()) < 0)
+ goto error;
+
+ return 0;
+
+error:
+ synclink_cleanup();
+ return rc;
+}
+
+static void __exit synclink_exit(void)
+{
+ synclink_cleanup();
+}
+
+module_init(synclink_init);
+module_exit(synclink_exit);
+
+/*
+ * usc_RTCmd()
+ *
+ * Issue a USC Receive/Transmit command to the
+ * Channel Command/Address Register (CCAR).
+ *
+ * Notes:
+ *
+ * The command is encoded in the most significant 5 bits <15..11>
+ * of the CCAR value. Bits <10..7> of the CCAR must be preserved
+ * and Bits <6..0> must be written as zeros.
+ *
+ * Arguments:
+ *
+ * info pointer to device information structure
+ * Cmd command mask (use symbolic macros)
+ *
+ * Return Value:
+ *
+ * None
+ */
+static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd )
+{
+ /* output command to CCAR in bits <15..11> */
+ /* preserve bits <10..7>, bits <6..0> must be zero */
+
+ outw( Cmd + info->loopback_bits, info->io_base + CCAR );
+
+ /* Read to flush write to CCAR */
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI )
+ inw( info->io_base + CCAR );
+
+} /* end of usc_RTCmd() */
+
+/*
+ * usc_DmaCmd()
+ *
+ * Issue a DMA command to the DMA Command/Address Register (DCAR).
+ *
+ * Arguments:
+ *
+ * info pointer to device information structure
+ * Cmd DMA command mask (usc_DmaCmd_XX Macros)
+ *
+ * Return Value:
+ *
+ * None
+ */
+static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd )
+{
+ /* write command mask to DCAR */
+ outw( Cmd + info->mbre_bit, info->io_base );
+
+ /* Read to flush write to DCAR */
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI )
+ inw( info->io_base );
+
+} /* end of usc_DmaCmd() */
+
+/*
+ * usc_OutDmaReg()
+ *
+ * Write a 16-bit value to a USC DMA register
+ *
+ * Arguments:
+ *
+ * info pointer to device info structure
+ * RegAddr register address (number) for write
+ * RegValue 16-bit value to write to register
+ *
+ * Return Value:
+ *
+ * None
+ *
+ */
+static void usc_OutDmaReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue )
+{
+ /* Note: The DCAR is located at the adapter base address */
+ /* Note: must preserve state of BIT8 in DCAR */
+
+ outw( RegAddr + info->mbre_bit, info->io_base );
+ outw( RegValue, info->io_base );
+
+ /* Read to flush write to DCAR */
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI )
+ inw( info->io_base );
+
+} /* end of usc_OutDmaReg() */
+
+/*
+ * usc_InDmaReg()
+ *
+ * Read a 16-bit value from a DMA register
+ *
+ * Arguments:
+ *
+ * info pointer to device info structure
+ * RegAddr register address (number) to read from
+ *
+ * Return Value:
+ *
+ * The 16-bit value read from register
+ *
+ */
+static u16 usc_InDmaReg( struct mgsl_struct *info, u16 RegAddr )
+{
+ /* Note: The DCAR is located at the adapter base address */
+ /* Note: must preserve state of BIT8 in DCAR */
+
+ outw( RegAddr + info->mbre_bit, info->io_base );
+ return inw( info->io_base );
+
+} /* end of usc_InDmaReg() */
+
+/*
+ *
+ * usc_OutReg()
+ *
+ * Write a 16-bit value to a USC serial channel register
+ *
+ * Arguments:
+ *
+ * info pointer to device info structure
+ * RegAddr register address (number) to write to
+ * RegValue 16-bit value to write to register
+ *
+ * Return Value:
+ *
+ * None
+ *
+ */
+static void usc_OutReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue )
+{
+ outw( RegAddr + info->loopback_bits, info->io_base + CCAR );
+ outw( RegValue, info->io_base + CCAR );
+
+ /* Read to flush write to CCAR */
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI )
+ inw( info->io_base + CCAR );
+
+} /* end of usc_OutReg() */
+
+/*
+ * usc_InReg()
+ *
+ * Reads a 16-bit value from a USC serial channel register
+ *
+ * Arguments:
+ *
+ * info pointer to device extension
+ * RegAddr register address (number) to read from
+ *
+ * Return Value:
+ *
+ * 16-bit value read from register
+ */
+static u16 usc_InReg( struct mgsl_struct *info, u16 RegAddr )
+{
+ outw( RegAddr + info->loopback_bits, info->io_base + CCAR );
+ return inw( info->io_base + CCAR );
+
+} /* end of usc_InReg() */
+
+/* usc_set_sdlc_mode()
+ *
+ * Set up the adapter for SDLC DMA communications.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: NONE
+ */
+static void usc_set_sdlc_mode( struct mgsl_struct *info )
+{
+ u16 RegValue;
+ bool PreSL1660;
+
+ /*
+ * determine if the IUSC on the adapter is pre-SL1660. If
+ * not, take advantage of the UnderWait feature of more
+ * modern chips. If an underrun occurs and this bit is set,
+ * the transmitter will idle the programmed idle pattern
+ * until the driver has time to service the underrun. Otherwise,
+ * the dma controller may get the cycles previously requested
+ * and begin transmitting queued tx data.
+ */
+ usc_OutReg(info,TMCR,0x1f);
+ RegValue=usc_InReg(info,TMDR);
+ PreSL1660 = (RegValue == IUSC_PRE_SL1660);
+
+ if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
+ {
+ /*
+ ** Channel Mode Register (CMR)
+ **
+ ** <15..14> 10 Tx Sub Modes, Send Flag on Underrun
+ ** <13> 0 0 = Transmit Disabled (initially)
+ ** <12> 0 1 = Consecutive Idles share common 0
+ ** <11..8> 1110 Transmitter Mode = HDLC/SDLC Loop
+ ** <7..4> 0000 Rx Sub Modes, addr/ctrl field handling
+ ** <3..0> 0110 Receiver Mode = HDLC/SDLC
+ **
+ ** 1000 1110 0000 0110 = 0x8e06
+ */
+ RegValue = 0x8e06;
+
+ /*--------------------------------------------------
+ * ignore user options for UnderRun Actions and
+ * preambles
+ *--------------------------------------------------*/
+ }
+ else
+ {
+ /* Channel mode Register (CMR)
+ *
+ * <15..14> 00 Tx Sub modes, Underrun Action
+ * <13> 0 1 = Send Preamble before opening flag
+ * <12> 0 1 = Consecutive Idles share common 0
+ * <11..8> 0110 Transmitter mode = HDLC/SDLC
+ * <7..4> 0000 Rx Sub modes, addr/ctrl field handling
+ * <3..0> 0110 Receiver mode = HDLC/SDLC
+ *
+ * 0000 0110 0000 0110 = 0x0606
+ */
+ if (info->params.mode == MGSL_MODE_RAW) {
+ RegValue = 0x0001; /* Set Receive mode = external sync */
+
+ usc_OutReg( info, IOCR, /* Set IOCR DCD is RxSync Detect Input */
+ (unsigned short)((usc_InReg(info, IOCR) & ~(BIT13|BIT12)) | BIT12));
+
+ /*
+ * TxSubMode:
+ * CMR <15> 0 Don't send CRC on Tx Underrun
+ * CMR <14> x undefined
+ * CMR <13> 0 Send preamble before openning sync
+ * CMR <12> 0 Send 8-bit syncs, 1=send Syncs per TxLength
+ *
+ * TxMode:
+ * CMR <11-8) 0100 MonoSync
+ *
+ * 0x00 0100 xxxx xxxx 04xx
+ */
+ RegValue |= 0x0400;
+ }
+ else {
+
+ RegValue = 0x0606;
+
+ if ( info->params.flags & HDLC_FLAG_UNDERRUN_ABORT15 )
+ RegValue |= BIT14;
+ else if ( info->params.flags & HDLC_FLAG_UNDERRUN_FLAG )
+ RegValue |= BIT15;
+ else if ( info->params.flags & HDLC_FLAG_UNDERRUN_CRC )
+ RegValue |= BIT15 + BIT14;
+ }
+
+ if ( info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE )
+ RegValue |= BIT13;
+ }
+
+ if ( info->params.mode == MGSL_MODE_HDLC &&
+ (info->params.flags & HDLC_FLAG_SHARE_ZERO) )
+ RegValue |= BIT12;
+
+ if ( info->params.addr_filter != 0xff )
+ {
+ /* set up receive address filtering */
+ usc_OutReg( info, RSR, info->params.addr_filter );
+ RegValue |= BIT4;
+ }
+
+ usc_OutReg( info, CMR, RegValue );
+ info->cmr_value = RegValue;
+
+ /* Receiver mode Register (RMR)
+ *
+ * <15..13> 000 encoding
+ * <12..11> 00 FCS = 16bit CRC CCITT (x15 + x12 + x5 + 1)
+ * <10> 1 1 = Set CRC to all 1s (use for SDLC/HDLC)
+ * <9> 0 1 = Include Receive chars in CRC
+ * <8> 1 1 = Use Abort/PE bit as abort indicator
+ * <7..6> 00 Even parity
+ * <5> 0 parity disabled
+ * <4..2> 000 Receive Char Length = 8 bits
+ * <1..0> 00 Disable Receiver
+ *
+ * 0000 0101 0000 0000 = 0x0500
+ */
+
+ RegValue = 0x0500;
+
+ switch ( info->params.encoding ) {
+ case HDLC_ENCODING_NRZB: RegValue |= BIT13; break;
+ case HDLC_ENCODING_NRZI_MARK: RegValue |= BIT14; break;
+ case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT14 + BIT13; break;
+ case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT15; break;
+ case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT15 + BIT13; break;
+ case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14; break;
+ case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14 + BIT13; break;
+ }
+
+ if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_16_CCITT )
+ RegValue |= BIT9;
+ else if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_32_CCITT )
+ RegValue |= ( BIT12 | BIT10 | BIT9 );
+
+ usc_OutReg( info, RMR, RegValue );
+
+ /* Set the Receive count Limit Register (RCLR) to 0xffff. */
+ /* When an opening flag of an SDLC frame is recognized the */
+ /* Receive Character count (RCC) is loaded with the value in */
+ /* RCLR. The RCC is decremented for each received byte. The */
+ /* value of RCC is stored after the closing flag of the frame */
+ /* allowing the frame size to be computed. */
+
+ usc_OutReg( info, RCLR, RCLRVALUE );
+
+ usc_RCmd( info, RCmd_SelectRicrdma_level );
+
+ /* Receive Interrupt Control Register (RICR)
+ *
+ * <15..8> ? RxFIFO DMA Request Level
+ * <7> 0 Exited Hunt IA (Interrupt Arm)
+ * <6> 0 Idle Received IA
+ * <5> 0 Break/Abort IA
+ * <4> 0 Rx Bound IA
+ * <3> 1 Queued status reflects oldest 2 bytes in FIFO
+ * <2> 0 Abort/PE IA
+ * <1> 1 Rx Overrun IA
+ * <0> 0 Select TC0 value for readback
+ *
+ * 0000 0000 0000 1000 = 0x000a
+ */
+
+ /* Carry over the Exit Hunt and Idle Received bits */
+ /* in case they have been armed by usc_ArmEvents. */
+
+ RegValue = usc_InReg( info, RICR ) & 0xc0;
+
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI )
+ usc_OutReg( info, RICR, (u16)(0x030a | RegValue) );
+ else
+ usc_OutReg( info, RICR, (u16)(0x140a | RegValue) );
+
+ /* Unlatch all Rx status bits and clear Rx status IRQ Pending */
+
+ usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
+ usc_ClearIrqPendingBits( info, RECEIVE_STATUS );
+
+ /* Transmit mode Register (TMR)
+ *
+ * <15..13> 000 encoding
+ * <12..11> 00 FCS = 16bit CRC CCITT (x15 + x12 + x5 + 1)
+ * <10> 1 1 = Start CRC as all 1s (use for SDLC/HDLC)
+ * <9> 0 1 = Tx CRC Enabled
+ * <8> 0 1 = Append CRC to end of transmit frame
+ * <7..6> 00 Transmit parity Even
+ * <5> 0 Transmit parity Disabled
+ * <4..2> 000 Tx Char Length = 8 bits
+ * <1..0> 00 Disable Transmitter
+ *
+ * 0000 0100 0000 0000 = 0x0400
+ */
+
+ RegValue = 0x0400;
+
+ switch ( info->params.encoding ) {
+ case HDLC_ENCODING_NRZB: RegValue |= BIT13; break;
+ case HDLC_ENCODING_NRZI_MARK: RegValue |= BIT14; break;
+ case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT14 + BIT13; break;
+ case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT15; break;
+ case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT15 + BIT13; break;
+ case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14; break;
+ case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14 + BIT13; break;
+ }
+
+ if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_16_CCITT )
+ RegValue |= BIT9 + BIT8;
+ else if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_32_CCITT )
+ RegValue |= ( BIT12 | BIT10 | BIT9 | BIT8);
+
+ usc_OutReg( info, TMR, RegValue );
+
+ usc_set_txidle( info );
+
+
+ usc_TCmd( info, TCmd_SelectTicrdma_level );
+
+ /* Transmit Interrupt Control Register (TICR)
+ *
+ * <15..8> ? Transmit FIFO DMA Level
+ * <7> 0 Present IA (Interrupt Arm)
+ * <6> 0 Idle Sent IA
+ * <5> 1 Abort Sent IA
+ * <4> 1 EOF/EOM Sent IA
+ * <3> 0 CRC Sent IA
+ * <2> 1 1 = Wait for SW Trigger to Start Frame
+ * <1> 1 Tx Underrun IA
+ * <0> 0 TC0 constant on read back
+ *
+ * 0000 0000 0011 0110 = 0x0036
+ */
+
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI )
+ usc_OutReg( info, TICR, 0x0736 );
+ else
+ usc_OutReg( info, TICR, 0x1436 );
+
+ usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
+ usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
+
+ /*
+ ** Transmit Command/Status Register (TCSR)
+ **
+ ** <15..12> 0000 TCmd
+ ** <11> 0/1 UnderWait
+ ** <10..08> 000 TxIdle
+ ** <7> x PreSent
+ ** <6> x IdleSent
+ ** <5> x AbortSent
+ ** <4> x EOF/EOM Sent
+ ** <3> x CRC Sent
+ ** <2> x All Sent
+ ** <1> x TxUnder
+ ** <0> x TxEmpty
+ **
+ ** 0000 0000 0000 0000 = 0x0000
+ */
+ info->tcsr_value = 0;
+
+ if ( !PreSL1660 )
+ info->tcsr_value |= TCSR_UNDERWAIT;
+
+ usc_OutReg( info, TCSR, info->tcsr_value );
+
+ /* Clock mode Control Register (CMCR)
+ *
+ * <15..14> 00 counter 1 Source = Disabled
+ * <13..12> 00 counter 0 Source = Disabled
+ * <11..10> 11 BRG1 Input is TxC Pin
+ * <9..8> 11 BRG0 Input is TxC Pin
+ * <7..6> 01 DPLL Input is BRG1 Output
+ * <5..3> XXX TxCLK comes from Port 0
+ * <2..0> XXX RxCLK comes from Port 1
+ *
+ * 0000 1111 0111 0111 = 0x0f77
+ */
+
+ RegValue = 0x0f40;
+
+ if ( info->params.flags & HDLC_FLAG_RXC_DPLL )
+ RegValue |= 0x0003; /* RxCLK from DPLL */
+ else if ( info->params.flags & HDLC_FLAG_RXC_BRG )
+ RegValue |= 0x0004; /* RxCLK from BRG0 */
+ else if ( info->params.flags & HDLC_FLAG_RXC_TXCPIN)
+ RegValue |= 0x0006; /* RxCLK from TXC Input */
+ else
+ RegValue |= 0x0007; /* RxCLK from Port1 */
+
+ if ( info->params.flags & HDLC_FLAG_TXC_DPLL )
+ RegValue |= 0x0018; /* TxCLK from DPLL */
+ else if ( info->params.flags & HDLC_FLAG_TXC_BRG )
+ RegValue |= 0x0020; /* TxCLK from BRG0 */
+ else if ( info->params.flags & HDLC_FLAG_TXC_RXCPIN)
+ RegValue |= 0x0038; /* RxCLK from TXC Input */
+ else
+ RegValue |= 0x0030; /* TxCLK from Port0 */
+
+ usc_OutReg( info, CMCR, RegValue );
+
+
+ /* Hardware Configuration Register (HCR)
+ *
+ * <15..14> 00 CTR0 Divisor:00=32,01=16,10=8,11=4
+ * <13> 0 CTR1DSel:0=CTR0Div determines CTR0Div
+ * <12> 0 CVOK:0=report code violation in biphase
+ * <11..10> 00 DPLL Divisor:00=32,01=16,10=8,11=4
+ * <9..8> XX DPLL mode:00=disable,01=NRZ,10=Biphase,11=Biphase Level
+ * <7..6> 00 reserved
+ * <5> 0 BRG1 mode:0=continuous,1=single cycle
+ * <4> X BRG1 Enable
+ * <3..2> 00 reserved
+ * <1> 0 BRG0 mode:0=continuous,1=single cycle
+ * <0> 0 BRG0 Enable
+ */
+
+ RegValue = 0x0000;
+
+ if ( info->params.flags & (HDLC_FLAG_RXC_DPLL + HDLC_FLAG_TXC_DPLL) ) {
+ u32 XtalSpeed;
+ u32 DpllDivisor;
+ u16 Tc;
+
+ /* DPLL is enabled. Use BRG1 to provide continuous reference clock */
+ /* for DPLL. DPLL mode in HCR is dependent on the encoding used. */
+
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI )
+ XtalSpeed = 11059200;
+ else
+ XtalSpeed = 14745600;
+
+ if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) {
+ DpllDivisor = 16;
+ RegValue |= BIT10;
+ }
+ else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) {
+ DpllDivisor = 8;
+ RegValue |= BIT11;
+ }
+ else
+ DpllDivisor = 32;
+
+ /* Tc = (Xtal/Speed) - 1 */
+ /* If twice the remainder of (Xtal/Speed) is greater than Speed */
+ /* then rounding up gives a more precise time constant. Instead */
+ /* of rounding up and then subtracting 1 we just don't subtract */
+ /* the one in this case. */
+
+ /*--------------------------------------------------
+ * ejz: for DPLL mode, application should use the
+ * same clock speed as the partner system, even
+ * though clocking is derived from the input RxData.
+ * In case the user uses a 0 for the clock speed,
+ * default to 0xffffffff and don't try to divide by
+ * zero
+ *--------------------------------------------------*/
+ if ( info->params.clock_speed )
+ {
+ Tc = (u16)((XtalSpeed/DpllDivisor)/info->params.clock_speed);
+ if ( !((((XtalSpeed/DpllDivisor) % info->params.clock_speed) * 2)
+ / info->params.clock_speed) )
+ Tc--;
+ }
+ else
+ Tc = -1;
+
+
+ /* Write 16-bit Time Constant for BRG1 */
+ usc_OutReg( info, TC1R, Tc );
+
+ RegValue |= BIT4; /* enable BRG1 */
+
+ switch ( info->params.encoding ) {
+ case HDLC_ENCODING_NRZ:
+ case HDLC_ENCODING_NRZB:
+ case HDLC_ENCODING_NRZI_MARK:
+ case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT8; break;
+ case HDLC_ENCODING_BIPHASE_MARK:
+ case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT9; break;
+ case HDLC_ENCODING_BIPHASE_LEVEL:
+ case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT9 + BIT8; break;
+ }
+ }
+
+ usc_OutReg( info, HCR, RegValue );
+
+
+ /* Channel Control/status Register (CCSR)
+ *
+ * <15> X RCC FIFO Overflow status (RO)
+ * <14> X RCC FIFO Not Empty status (RO)
+ * <13> 0 1 = Clear RCC FIFO (WO)
+ * <12> X DPLL Sync (RW)
+ * <11> X DPLL 2 Missed Clocks status (RO)
+ * <10> X DPLL 1 Missed Clock status (RO)
+ * <9..8> 00 DPLL Resync on rising and falling edges (RW)
+ * <7> X SDLC Loop On status (RO)
+ * <6> X SDLC Loop Send status (RO)
+ * <5> 1 Bypass counters for TxClk and RxClk (RW)
+ * <4..2> 000 Last Char of SDLC frame has 8 bits (RW)
+ * <1..0> 00 reserved
+ *
+ * 0000 0000 0010 0000 = 0x0020
+ */
+
+ usc_OutReg( info, CCSR, 0x1020 );
+
+
+ if ( info->params.flags & HDLC_FLAG_AUTO_CTS ) {
+ usc_OutReg( info, SICR,
+ (u16)(usc_InReg(info,SICR) | SICR_CTS_INACTIVE) );
+ }
+
+
+ /* enable Master Interrupt Enable bit (MIE) */
+ usc_EnableMasterIrqBit( info );
+
+ usc_ClearIrqPendingBits( info, RECEIVE_STATUS + RECEIVE_DATA +
+ TRANSMIT_STATUS + TRANSMIT_DATA + MISC);
+
+ /* arm RCC underflow interrupt */
+ usc_OutReg(info, SICR, (u16)(usc_InReg(info,SICR) | BIT3));
+ usc_EnableInterrupts(info, MISC);
+
+ info->mbre_bit = 0;
+ outw( 0, info->io_base ); /* clear Master Bus Enable (DCAR) */
+ usc_DmaCmd( info, DmaCmd_ResetAllChannels ); /* disable both DMA channels */
+ info->mbre_bit = BIT8;
+ outw( BIT8, info->io_base ); /* set Master Bus Enable (DCAR) */
+
+ if (info->bus_type == MGSL_BUS_TYPE_ISA) {
+ /* Enable DMAEN (Port 7, Bit 14) */
+ /* This connects the DMA request signal to the ISA bus */
+ usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) & ~BIT14));
+ }
+
+ /* DMA Control Register (DCR)
+ *
+ * <15..14> 10 Priority mode = Alternating Tx/Rx
+ * 01 Rx has priority
+ * 00 Tx has priority
+ *
+ * <13> 1 Enable Priority Preempt per DCR<15..14>
+ * (WARNING DCR<11..10> must be 00 when this is 1)
+ * 0 Choose activate channel per DCR<11..10>
+ *
+ * <12> 0 Little Endian for Array/List
+ * <11..10> 00 Both Channels can use each bus grant
+ * <9..6> 0000 reserved
+ * <5> 0 7 CLK - Minimum Bus Re-request Interval
+ * <4> 0 1 = drive D/C and S/D pins
+ * <3> 1 1 = Add one wait state to all DMA cycles.
+ * <2> 0 1 = Strobe /UAS on every transfer.
+ * <1..0> 11 Addr incrementing only affects LS24 bits
+ *
+ * 0110 0000 0000 1011 = 0x600b
+ */
+
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
+ /* PCI adapter does not need DMA wait state */
+ usc_OutDmaReg( info, DCR, 0xa00b );
+ }
+ else
+ usc_OutDmaReg( info, DCR, 0x800b );
+
+
+ /* Receive DMA mode Register (RDMR)
+ *
+ * <15..14> 11 DMA mode = Linked List Buffer mode
+ * <13> 1 RSBinA/L = store Rx status Block in Arrary/List entry
+ * <12> 1 Clear count of List Entry after fetching
+ * <11..10> 00 Address mode = Increment
+ * <9> 1 Terminate Buffer on RxBound
+ * <8> 0 Bus Width = 16bits
+ * <7..0> ? status Bits (write as 0s)
+ *
+ * 1111 0010 0000 0000 = 0xf200
+ */
+
+ usc_OutDmaReg( info, RDMR, 0xf200 );
+
+
+ /* Transmit DMA mode Register (TDMR)
+ *
+ * <15..14> 11 DMA mode = Linked List Buffer mode
+ * <13> 1 TCBinA/L = fetch Tx Control Block from List entry
+ * <12> 1 Clear count of List Entry after fetching
+ * <11..10> 00 Address mode = Increment
+ * <9> 1 Terminate Buffer on end of frame
+ * <8> 0 Bus Width = 16bits
+ * <7..0> ? status Bits (Read Only so write as 0)
+ *
+ * 1111 0010 0000 0000 = 0xf200
+ */
+
+ usc_OutDmaReg( info, TDMR, 0xf200 );
+
+
+ /* DMA Interrupt Control Register (DICR)
+ *
+ * <15> 1 DMA Interrupt Enable
+ * <14> 0 1 = Disable IEO from USC
+ * <13> 0 1 = Don't provide vector during IntAck
+ * <12> 1 1 = Include status in Vector
+ * <10..2> 0 reserved, Must be 0s
+ * <1> 0 1 = Rx DMA Interrupt Enabled
+ * <0> 0 1 = Tx DMA Interrupt Enabled
+ *
+ * 1001 0000 0000 0000 = 0x9000
+ */
+
+ usc_OutDmaReg( info, DICR, 0x9000 );
+
+ usc_InDmaReg( info, RDMR ); /* clear pending receive DMA IRQ bits */
+ usc_InDmaReg( info, TDMR ); /* clear pending transmit DMA IRQ bits */
+ usc_OutDmaReg( info, CDIR, 0x0303 ); /* clear IUS and Pending for Tx and Rx */
+
+ /* Channel Control Register (CCR)
+ *
+ * <15..14> 10 Use 32-bit Tx Control Blocks (TCBs)
+ * <13> 0 Trigger Tx on SW Command Disabled
+ * <12> 0 Flag Preamble Disabled
+ * <11..10> 00 Preamble Length
+ * <9..8> 00 Preamble Pattern
+ * <7..6> 10 Use 32-bit Rx status Blocks (RSBs)
+ * <5> 0 Trigger Rx on SW Command Disabled
+ * <4..0> 0 reserved
+ *
+ * 1000 0000 1000 0000 = 0x8080
+ */
+
+ RegValue = 0x8080;
+
+ switch ( info->params.preamble_length ) {
+ case HDLC_PREAMBLE_LENGTH_16BITS: RegValue |= BIT10; break;
+ case HDLC_PREAMBLE_LENGTH_32BITS: RegValue |= BIT11; break;
+ case HDLC_PREAMBLE_LENGTH_64BITS: RegValue |= BIT11 + BIT10; break;
+ }
+
+ switch ( info->params.preamble ) {
+ case HDLC_PREAMBLE_PATTERN_FLAGS: RegValue |= BIT8 + BIT12; break;
+ case HDLC_PREAMBLE_PATTERN_ONES: RegValue |= BIT8; break;
+ case HDLC_PREAMBLE_PATTERN_10: RegValue |= BIT9; break;
+ case HDLC_PREAMBLE_PATTERN_01: RegValue |= BIT9 + BIT8; break;
+ }
+
+ usc_OutReg( info, CCR, RegValue );
+
+
+ /*
+ * Burst/Dwell Control Register
+ *
+ * <15..8> 0x20 Maximum number of transfers per bus grant
+ * <7..0> 0x00 Maximum number of clock cycles per bus grant
+ */
+
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
+ /* don't limit bus occupancy on PCI adapter */
+ usc_OutDmaReg( info, BDCR, 0x0000 );
+ }
+ else
+ usc_OutDmaReg( info, BDCR, 0x2000 );
+
+ usc_stop_transmitter(info);
+ usc_stop_receiver(info);
+
+} /* end of usc_set_sdlc_mode() */
+
+/* usc_enable_loopback()
+ *
+ * Set the 16C32 for internal loopback mode.
+ * The TxCLK and RxCLK signals are generated from the BRG0 and
+ * the TxD is looped back to the RxD internally.
+ *
+ * Arguments: info pointer to device instance data
+ * enable 1 = enable loopback, 0 = disable
+ * Return Value: None
+ */
+static void usc_enable_loopback(struct mgsl_struct *info, int enable)
+{
+ if (enable) {
+ /* blank external TXD output */
+ usc_OutReg(info,IOCR,usc_InReg(info,IOCR) | (BIT7+BIT6));
+
+ /* Clock mode Control Register (CMCR)
+ *
+ * <15..14> 00 counter 1 Disabled
+ * <13..12> 00 counter 0 Disabled
+ * <11..10> 11 BRG1 Input is TxC Pin
+ * <9..8> 11 BRG0 Input is TxC Pin
+ * <7..6> 01 DPLL Input is BRG1 Output
+ * <5..3> 100 TxCLK comes from BRG0
+ * <2..0> 100 RxCLK comes from BRG0
+ *
+ * 0000 1111 0110 0100 = 0x0f64
+ */
+
+ usc_OutReg( info, CMCR, 0x0f64 );
+
+ /* Write 16-bit Time Constant for BRG0 */
+ /* use clock speed if available, otherwise use 8 for diagnostics */
+ if (info->params.clock_speed) {
+ if (info->bus_type == MGSL_BUS_TYPE_PCI)
+ usc_OutReg(info, TC0R, (u16)((11059200/info->params.clock_speed)-1));
+ else
+ usc_OutReg(info, TC0R, (u16)((14745600/info->params.clock_speed)-1));
+ } else
+ usc_OutReg(info, TC0R, (u16)8);
+
+ /* Hardware Configuration Register (HCR) Clear Bit 1, BRG0
+ mode = Continuous Set Bit 0 to enable BRG0. */
+ usc_OutReg( info, HCR, (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) );
+
+ /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */
+ usc_OutReg(info, IOCR, (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004));
+
+ /* set Internal Data loopback mode */
+ info->loopback_bits = 0x300;
+ outw( 0x0300, info->io_base + CCAR );
+ } else {
+ /* enable external TXD output */
+ usc_OutReg(info,IOCR,usc_InReg(info,IOCR) & ~(BIT7+BIT6));
+
+ /* clear Internal Data loopback mode */
+ info->loopback_bits = 0;
+ outw( 0,info->io_base + CCAR );
+ }
+
+} /* end of usc_enable_loopback() */
+
+/* usc_enable_aux_clock()
+ *
+ * Enabled the AUX clock output at the specified frequency.
+ *
+ * Arguments:
+ *
+ * info pointer to device extension
+ * data_rate data rate of clock in bits per second
+ * A data rate of 0 disables the AUX clock.
+ *
+ * Return Value: None
+ */
+static void usc_enable_aux_clock( struct mgsl_struct *info, u32 data_rate )
+{
+ u32 XtalSpeed;
+ u16 Tc;
+
+ if ( data_rate ) {
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI )
+ XtalSpeed = 11059200;
+ else
+ XtalSpeed = 14745600;
+
+
+ /* Tc = (Xtal/Speed) - 1 */
+ /* If twice the remainder of (Xtal/Speed) is greater than Speed */
+ /* then rounding up gives a more precise time constant. Instead */
+ /* of rounding up and then subtracting 1 we just don't subtract */
+ /* the one in this case. */
+
+
+ Tc = (u16)(XtalSpeed/data_rate);
+ if ( !(((XtalSpeed % data_rate) * 2) / data_rate) )
+ Tc--;
+
+ /* Write 16-bit Time Constant for BRG0 */
+ usc_OutReg( info, TC0R, Tc );
+
+ /*
+ * Hardware Configuration Register (HCR)
+ * Clear Bit 1, BRG0 mode = Continuous
+ * Set Bit 0 to enable BRG0.
+ */
+
+ usc_OutReg( info, HCR, (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) );
+
+ /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */
+ usc_OutReg( info, IOCR, (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004) );
+ } else {
+ /* data rate == 0 so turn off BRG0 */
+ usc_OutReg( info, HCR, (u16)(usc_InReg( info, HCR ) & ~BIT0) );
+ }
+
+} /* end of usc_enable_aux_clock() */
+
+/*
+ *
+ * usc_process_rxoverrun_sync()
+ *
+ * This function processes a receive overrun by resetting the
+ * receive DMA buffers and issuing a Purge Rx FIFO command
+ * to allow the receiver to continue receiving.
+ *
+ * Arguments:
+ *
+ * info pointer to device extension
+ *
+ * Return Value: None
+ */
+static void usc_process_rxoverrun_sync( struct mgsl_struct *info )
+{
+ int start_index;
+ int end_index;
+ int frame_start_index;
+ bool start_of_frame_found = false;
+ bool end_of_frame_found = false;
+ bool reprogram_dma = false;
+
+ DMABUFFERENTRY *buffer_list = info->rx_buffer_list;
+ u32 phys_addr;
+
+ usc_DmaCmd( info, DmaCmd_PauseRxChannel );
+ usc_RCmd( info, RCmd_EnterHuntmode );
+ usc_RTCmd( info, RTCmd_PurgeRxFifo );
+
+ /* CurrentRxBuffer points to the 1st buffer of the next */
+ /* possibly available receive frame. */
+
+ frame_start_index = start_index = end_index = info->current_rx_buffer;
+
+ /* Search for an unfinished string of buffers. This means */
+ /* that a receive frame started (at least one buffer with */
+ /* count set to zero) but there is no terminiting buffer */
+ /* (status set to non-zero). */
+
+ while( !buffer_list[end_index].count )
+ {
+ /* Count field has been reset to zero by 16C32. */
+ /* This buffer is currently in use. */
+
+ if ( !start_of_frame_found )
+ {
+ start_of_frame_found = true;
+ frame_start_index = end_index;
+ end_of_frame_found = false;
+ }
+
+ if ( buffer_list[end_index].status )
+ {
+ /* Status field has been set by 16C32. */
+ /* This is the last buffer of a received frame. */
+
+ /* We want to leave the buffers for this frame intact. */
+ /* Move on to next possible frame. */
+
+ start_of_frame_found = false;
+ end_of_frame_found = true;
+ }
+
+ /* advance to next buffer entry in linked list */
+ end_index++;
+ if ( end_index == info->rx_buffer_count )
+ end_index = 0;
+
+ if ( start_index == end_index )
+ {
+ /* The entire list has been searched with all Counts == 0 and */
+ /* all Status == 0. The receive buffers are */
+ /* completely screwed, reset all receive buffers! */
+ mgsl_reset_rx_dma_buffers( info );
+ frame_start_index = 0;
+ start_of_frame_found = false;
+ reprogram_dma = true;
+ break;
+ }
+ }
+
+ if ( start_of_frame_found && !end_of_frame_found )
+ {
+ /* There is an unfinished string of receive DMA buffers */
+ /* as a result of the receiver overrun. */
+
+ /* Reset the buffers for the unfinished frame */
+ /* and reprogram the receive DMA controller to start */
+ /* at the 1st buffer of unfinished frame. */
+
+ start_index = frame_start_index;
+
+ do
+ {
+ *((unsigned long *)&(info->rx_buffer_list[start_index++].count)) = DMABUFFERSIZE;
+
+ /* Adjust index for wrap around. */
+ if ( start_index == info->rx_buffer_count )
+ start_index = 0;
+
+ } while( start_index != end_index );
+
+ reprogram_dma = true;
+ }
+
+ if ( reprogram_dma )
+ {
+ usc_UnlatchRxstatusBits(info,RXSTATUS_ALL);
+ usc_ClearIrqPendingBits(info, RECEIVE_DATA|RECEIVE_STATUS);
+ usc_UnlatchRxstatusBits(info, RECEIVE_DATA|RECEIVE_STATUS);
+
+ usc_EnableReceiver(info,DISABLE_UNCONDITIONAL);
+
+ /* This empties the receive FIFO and loads the RCC with RCLR */
+ usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
+
+ /* program 16C32 with physical address of 1st DMA buffer entry */
+ phys_addr = info->rx_buffer_list[frame_start_index].phys_entry;
+ usc_OutDmaReg( info, NRARL, (u16)phys_addr );
+ usc_OutDmaReg( info, NRARU, (u16)(phys_addr >> 16) );
+
+ usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
+ usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS );
+ usc_EnableInterrupts( info, RECEIVE_STATUS );
+
+ /* 1. Arm End of Buffer (EOB) Receive DMA Interrupt (BIT2 of RDIAR) */
+ /* 2. Enable Receive DMA Interrupts (BIT1 of DICR) */
+
+ usc_OutDmaReg( info, RDIAR, BIT3 + BIT2 );
+ usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT1) );
+ usc_DmaCmd( info, DmaCmd_InitRxChannel );
+ if ( info->params.flags & HDLC_FLAG_AUTO_DCD )
+ usc_EnableReceiver(info,ENABLE_AUTO_DCD);
+ else
+ usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
+ }
+ else
+ {
+ /* This empties the receive FIFO and loads the RCC with RCLR */
+ usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
+ usc_RTCmd( info, RTCmd_PurgeRxFifo );
+ }
+
+} /* end of usc_process_rxoverrun_sync() */
+
+/* usc_stop_receiver()
+ *
+ * Disable USC receiver
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void usc_stop_receiver( struct mgsl_struct *info )
+{
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):usc_stop_receiver(%s)\n",
+ __FILE__,__LINE__, info->device_name );
+
+ /* Disable receive DMA channel. */
+ /* This also disables receive DMA channel interrupts */
+ usc_DmaCmd( info, DmaCmd_ResetRxChannel );
+
+ usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
+ usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS );
+ usc_DisableInterrupts( info, RECEIVE_DATA + RECEIVE_STATUS );
+
+ usc_EnableReceiver(info,DISABLE_UNCONDITIONAL);
+
+ /* This empties the receive FIFO and loads the RCC with RCLR */
+ usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
+ usc_RTCmd( info, RTCmd_PurgeRxFifo );
+
+ info->rx_enabled = false;
+ info->rx_overflow = false;
+ info->rx_rcc_underrun = false;
+
+} /* end of stop_receiver() */
+
+/* usc_start_receiver()
+ *
+ * Enable the USC receiver
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void usc_start_receiver( struct mgsl_struct *info )
+{
+ u32 phys_addr;
+
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):usc_start_receiver(%s)\n",
+ __FILE__,__LINE__, info->device_name );
+
+ mgsl_reset_rx_dma_buffers( info );
+ usc_stop_receiver( info );
+
+ usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
+ usc_RTCmd( info, RTCmd_PurgeRxFifo );
+
+ if ( info->params.mode == MGSL_MODE_HDLC ||
+ info->params.mode == MGSL_MODE_RAW ) {
+ /* DMA mode Transfers */
+ /* Program the DMA controller. */
+ /* Enable the DMA controller end of buffer interrupt. */
+
+ /* program 16C32 with physical address of 1st DMA buffer entry */
+ phys_addr = info->rx_buffer_list[0].phys_entry;
+ usc_OutDmaReg( info, NRARL, (u16)phys_addr );
+ usc_OutDmaReg( info, NRARU, (u16)(phys_addr >> 16) );
+
+ usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
+ usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS );
+ usc_EnableInterrupts( info, RECEIVE_STATUS );
+
+ /* 1. Arm End of Buffer (EOB) Receive DMA Interrupt (BIT2 of RDIAR) */
+ /* 2. Enable Receive DMA Interrupts (BIT1 of DICR) */
+
+ usc_OutDmaReg( info, RDIAR, BIT3 + BIT2 );
+ usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT1) );
+ usc_DmaCmd( info, DmaCmd_InitRxChannel );
+ if ( info->params.flags & HDLC_FLAG_AUTO_DCD )
+ usc_EnableReceiver(info,ENABLE_AUTO_DCD);
+ else
+ usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
+ } else {
+ usc_UnlatchRxstatusBits(info, RXSTATUS_ALL);
+ usc_ClearIrqPendingBits(info, RECEIVE_DATA + RECEIVE_STATUS);
+ usc_EnableInterrupts(info, RECEIVE_DATA);
+
+ usc_RTCmd( info, RTCmd_PurgeRxFifo );
+ usc_RCmd( info, RCmd_EnterHuntmode );
+
+ usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
+ }
+
+ usc_OutReg( info, CCSR, 0x1020 );
+
+ info->rx_enabled = true;
+
+} /* end of usc_start_receiver() */
+
+/* usc_start_transmitter()
+ *
+ * Enable the USC transmitter and send a transmit frame if
+ * one is loaded in the DMA buffers.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void usc_start_transmitter( struct mgsl_struct *info )
+{
+ u32 phys_addr;
+ unsigned int FrameSize;
+
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):usc_start_transmitter(%s)\n",
+ __FILE__,__LINE__, info->device_name );
+
+ if ( info->xmit_cnt ) {
+
+ /* If auto RTS enabled and RTS is inactive, then assert */
+ /* RTS and set a flag indicating that the driver should */
+ /* negate RTS when the transmission completes. */
+
+ info->drop_rts_on_tx_done = false;
+
+ if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) {
+ usc_get_serial_signals( info );
+ if ( !(info->serial_signals & SerialSignal_RTS) ) {
+ info->serial_signals |= SerialSignal_RTS;
+ usc_set_serial_signals( info );
+ info->drop_rts_on_tx_done = true;
+ }
+ }
+
+
+ if ( info->params.mode == MGSL_MODE_ASYNC ) {
+ if ( !info->tx_active ) {
+ usc_UnlatchTxstatusBits(info, TXSTATUS_ALL);
+ usc_ClearIrqPendingBits(info, TRANSMIT_STATUS + TRANSMIT_DATA);
+ usc_EnableInterrupts(info, TRANSMIT_DATA);
+ usc_load_txfifo(info);
+ }
+ } else {
+ /* Disable transmit DMA controller while programming. */
+ usc_DmaCmd( info, DmaCmd_ResetTxChannel );
+
+ /* Transmit DMA buffer is loaded, so program USC */
+ /* to send the frame contained in the buffers. */
+
+ FrameSize = info->tx_buffer_list[info->start_tx_dma_buffer].rcc;
+
+ /* if operating in Raw sync mode, reset the rcc component
+ * of the tx dma buffer entry, otherwise, the serial controller
+ * will send a closing sync char after this count.
+ */
+ if ( info->params.mode == MGSL_MODE_RAW )
+ info->tx_buffer_list[info->start_tx_dma_buffer].rcc = 0;
+
+ /* Program the Transmit Character Length Register (TCLR) */
+ /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */
+ usc_OutReg( info, TCLR, (u16)FrameSize );
+
+ usc_RTCmd( info, RTCmd_PurgeTxFifo );
+
+ /* Program the address of the 1st DMA Buffer Entry in linked list */
+ phys_addr = info->tx_buffer_list[info->start_tx_dma_buffer].phys_entry;
+ usc_OutDmaReg( info, NTARL, (u16)phys_addr );
+ usc_OutDmaReg( info, NTARU, (u16)(phys_addr >> 16) );
+
+ usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
+ usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
+ usc_EnableInterrupts( info, TRANSMIT_STATUS );
+
+ if ( info->params.mode == MGSL_MODE_RAW &&
+ info->num_tx_dma_buffers > 1 ) {
+ /* When running external sync mode, attempt to 'stream' transmit */
+ /* by filling tx dma buffers as they become available. To do this */
+ /* we need to enable Tx DMA EOB Status interrupts : */
+ /* */
+ /* 1. Arm End of Buffer (EOB) Transmit DMA Interrupt (BIT2 of TDIAR) */
+ /* 2. Enable Transmit DMA Interrupts (BIT0 of DICR) */
+
+ usc_OutDmaReg( info, TDIAR, BIT2|BIT3 );
+ usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT0) );
+ }
+
+ /* Initialize Transmit DMA Channel */
+ usc_DmaCmd( info, DmaCmd_InitTxChannel );
+
+ usc_TCmd( info, TCmd_SendFrame );
+
+ mod_timer(&info->tx_timer, jiffies +
+ msecs_to_jiffies(5000));
+ }
+ info->tx_active = true;
+ }
+
+ if ( !info->tx_enabled ) {
+ info->tx_enabled = true;
+ if ( info->params.flags & HDLC_FLAG_AUTO_CTS )
+ usc_EnableTransmitter(info,ENABLE_AUTO_CTS);
+ else
+ usc_EnableTransmitter(info,ENABLE_UNCONDITIONAL);
+ }
+
+} /* end of usc_start_transmitter() */
+
+/* usc_stop_transmitter()
+ *
+ * Stops the transmitter and DMA
+ *
+ * Arguments: info pointer to device isntance data
+ * Return Value: None
+ */
+static void usc_stop_transmitter( struct mgsl_struct *info )
+{
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):usc_stop_transmitter(%s)\n",
+ __FILE__,__LINE__, info->device_name );
+
+ del_timer(&info->tx_timer);
+
+ usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
+ usc_ClearIrqPendingBits( info, TRANSMIT_STATUS + TRANSMIT_DATA );
+ usc_DisableInterrupts( info, TRANSMIT_STATUS + TRANSMIT_DATA );
+
+ usc_EnableTransmitter(info,DISABLE_UNCONDITIONAL);
+ usc_DmaCmd( info, DmaCmd_ResetTxChannel );
+ usc_RTCmd( info, RTCmd_PurgeTxFifo );
+
+ info->tx_enabled = false;
+ info->tx_active = false;
+
+} /* end of usc_stop_transmitter() */
+
+/* usc_load_txfifo()
+ *
+ * Fill the transmit FIFO until the FIFO is full or
+ * there is no more data to load.
+ *
+ * Arguments: info pointer to device extension (instance data)
+ * Return Value: None
+ */
+static void usc_load_txfifo( struct mgsl_struct *info )
+{
+ int Fifocount;
+ u8 TwoBytes[2];
+
+ if ( !info->xmit_cnt && !info->x_char )
+ return;
+
+ /* Select transmit FIFO status readback in TICR */
+ usc_TCmd( info, TCmd_SelectTicrTxFifostatus );
+
+ /* load the Transmit FIFO until FIFOs full or all data sent */
+
+ while( (Fifocount = usc_InReg(info, TICR) >> 8) && info->xmit_cnt ) {
+ /* there is more space in the transmit FIFO and */
+ /* there is more data in transmit buffer */
+
+ if ( (info->xmit_cnt > 1) && (Fifocount > 1) && !info->x_char ) {
+ /* write a 16-bit word from transmit buffer to 16C32 */
+
+ TwoBytes[0] = info->xmit_buf[info->xmit_tail++];
+ info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
+ TwoBytes[1] = info->xmit_buf[info->xmit_tail++];
+ info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
+
+ outw( *((u16 *)TwoBytes), info->io_base + DATAREG);
+
+ info->xmit_cnt -= 2;
+ info->icount.tx += 2;
+ } else {
+ /* only 1 byte left to transmit or 1 FIFO slot left */
+
+ outw( (inw( info->io_base + CCAR) & 0x0780) | (TDR+LSBONLY),
+ info->io_base + CCAR );
+
+ if (info->x_char) {
+ /* transmit pending high priority char */
+ outw( info->x_char,info->io_base + CCAR );
+ info->x_char = 0;
+ } else {
+ outw( info->xmit_buf[info->xmit_tail++],info->io_base + CCAR );
+ info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
+ info->xmit_cnt--;
+ }
+ info->icount.tx++;
+ }
+ }
+
+} /* end of usc_load_txfifo() */
+
+/* usc_reset()
+ *
+ * Reset the adapter to a known state and prepare it for further use.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void usc_reset( struct mgsl_struct *info )
+{
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
+ int i;
+ u32 readval;
+
+ /* Set BIT30 of Misc Control Register */
+ /* (Local Control Register 0x50) to force reset of USC. */
+
+ volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50);
+ u32 *LCR0BRDR = (u32 *)(info->lcr_base + 0x28);
+
+ info->misc_ctrl_value |= BIT30;
+ *MiscCtrl = info->misc_ctrl_value;
+
+ /*
+ * Force at least 170ns delay before clearing
+ * reset bit. Each read from LCR takes at least
+ * 30ns so 10 times for 300ns to be safe.
+ */
+ for(i=0;i<10;i++)
+ readval = *MiscCtrl;
+
+ info->misc_ctrl_value &= ~BIT30;
+ *MiscCtrl = info->misc_ctrl_value;
+
+ *LCR0BRDR = BUS_DESCRIPTOR(
+ 1, // Write Strobe Hold (0-3)
+ 2, // Write Strobe Delay (0-3)
+ 2, // Read Strobe Delay (0-3)
+ 0, // NWDD (Write data-data) (0-3)
+ 4, // NWAD (Write Addr-data) (0-31)
+ 0, // NXDA (Read/Write Data-Addr) (0-3)
+ 0, // NRDD (Read Data-Data) (0-3)
+ 5 // NRAD (Read Addr-Data) (0-31)
+ );
+ } else {
+ /* do HW reset */
+ outb( 0,info->io_base + 8 );
+ }
+
+ info->mbre_bit = 0;
+ info->loopback_bits = 0;
+ info->usc_idle_mode = 0;
+
+ /*
+ * Program the Bus Configuration Register (BCR)
+ *
+ * <15> 0 Don't use separate address
+ * <14..6> 0 reserved
+ * <5..4> 00 IAckmode = Default, don't care
+ * <3> 1 Bus Request Totem Pole output
+ * <2> 1 Use 16 Bit data bus
+ * <1> 0 IRQ Totem Pole output
+ * <0> 0 Don't Shift Right Addr
+ *
+ * 0000 0000 0000 1100 = 0x000c
+ *
+ * By writing to io_base + SDPIN the Wait/Ack pin is
+ * programmed to work as a Wait pin.
+ */
+
+ outw( 0x000c,info->io_base + SDPIN );
+
+
+ outw( 0,info->io_base );
+ outw( 0,info->io_base + CCAR );
+
+ /* select little endian byte ordering */
+ usc_RTCmd( info, RTCmd_SelectLittleEndian );
+
+
+ /* Port Control Register (PCR)
+ *
+ * <15..14> 11 Port 7 is Output (~DMAEN, Bit 14 : 0 = Enabled)
+ * <13..12> 11 Port 6 is Output (~INTEN, Bit 12 : 0 = Enabled)
+ * <11..10> 00 Port 5 is Input (No Connect, Don't Care)
+ * <9..8> 00 Port 4 is Input (No Connect, Don't Care)
+ * <7..6> 11 Port 3 is Output (~RTS, Bit 6 : 0 = Enabled )
+ * <5..4> 11 Port 2 is Output (~DTR, Bit 4 : 0 = Enabled )
+ * <3..2> 01 Port 1 is Input (Dedicated RxC)
+ * <1..0> 01 Port 0 is Input (Dedicated TxC)
+ *
+ * 1111 0000 1111 0101 = 0xf0f5
+ */
+
+ usc_OutReg( info, PCR, 0xf0f5 );
+
+
+ /*
+ * Input/Output Control Register
+ *
+ * <15..14> 00 CTS is active low input
+ * <13..12> 00 DCD is active low input
+ * <11..10> 00 TxREQ pin is input (DSR)
+ * <9..8> 00 RxREQ pin is input (RI)
+ * <7..6> 00 TxD is output (Transmit Data)
+ * <5..3> 000 TxC Pin in Input (14.7456MHz Clock)
+ * <2..0> 100 RxC is Output (drive with BRG0)
+ *
+ * 0000 0000 0000 0100 = 0x0004
+ */
+
+ usc_OutReg( info, IOCR, 0x0004 );
+
+} /* end of usc_reset() */
+
+/* usc_set_async_mode()
+ *
+ * Program adapter for asynchronous communications.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void usc_set_async_mode( struct mgsl_struct *info )
+{
+ u16 RegValue;
+
+ /* disable interrupts while programming USC */
+ usc_DisableMasterIrqBit( info );
+
+ outw( 0, info->io_base ); /* clear Master Bus Enable (DCAR) */
+ usc_DmaCmd( info, DmaCmd_ResetAllChannels ); /* disable both DMA channels */
+
+ usc_loopback_frame( info );
+
+ /* Channel mode Register (CMR)
+ *
+ * <15..14> 00 Tx Sub modes, 00 = 1 Stop Bit
+ * <13..12> 00 00 = 16X Clock
+ * <11..8> 0000 Transmitter mode = Asynchronous
+ * <7..6> 00 reserved?
+ * <5..4> 00 Rx Sub modes, 00 = 16X Clock
+ * <3..0> 0000 Receiver mode = Asynchronous
+ *
+ * 0000 0000 0000 0000 = 0x0
+ */
+
+ RegValue = 0;
+ if ( info->params.stop_bits != 1 )
+ RegValue |= BIT14;
+ usc_OutReg( info, CMR, RegValue );
+
+
+ /* Receiver mode Register (RMR)
+ *
+ * <15..13> 000 encoding = None
+ * <12..08> 00000 reserved (Sync Only)
+ * <7..6> 00 Even parity
+ * <5> 0 parity disabled
+ * <4..2> 000 Receive Char Length = 8 bits
+ * <1..0> 00 Disable Receiver
+ *
+ * 0000 0000 0000 0000 = 0x0
+ */
+
+ RegValue = 0;
+
+ if ( info->params.data_bits != 8 )
+ RegValue |= BIT4+BIT3+BIT2;
+
+ if ( info->params.parity != ASYNC_PARITY_NONE ) {
+ RegValue |= BIT5;
+ if ( info->params.parity != ASYNC_PARITY_ODD )
+ RegValue |= BIT6;
+ }
+
+ usc_OutReg( info, RMR, RegValue );
+
+
+ /* Set IRQ trigger level */
+
+ usc_RCmd( info, RCmd_SelectRicrIntLevel );
+
+
+ /* Receive Interrupt Control Register (RICR)
+ *
+ * <15..8> ? RxFIFO IRQ Request Level
+ *
+ * Note: For async mode the receive FIFO level must be set
+ * to 0 to avoid the situation where the FIFO contains fewer bytes
+ * than the trigger level and no more data is expected.
+ *
+ * <7> 0 Exited Hunt IA (Interrupt Arm)
+ * <6> 0 Idle Received IA
+ * <5> 0 Break/Abort IA
+ * <4> 0 Rx Bound IA
+ * <3> 0 Queued status reflects oldest byte in FIFO
+ * <2> 0 Abort/PE IA
+ * <1> 0 Rx Overrun IA
+ * <0> 0 Select TC0 value for readback
+ *
+ * 0000 0000 0100 0000 = 0x0000 + (FIFOLEVEL in MSB)
+ */
+
+ usc_OutReg( info, RICR, 0x0000 );
+
+ usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
+ usc_ClearIrqPendingBits( info, RECEIVE_STATUS );
+
+
+ /* Transmit mode Register (TMR)
+ *
+ * <15..13> 000 encoding = None
+ * <12..08> 00000 reserved (Sync Only)
+ * <7..6> 00 Transmit parity Even
+ * <5> 0 Transmit parity Disabled
+ * <4..2> 000 Tx Char Length = 8 bits
+ * <1..0> 00 Disable Transmitter
+ *
+ * 0000 0000 0000 0000 = 0x0
+ */
+
+ RegValue = 0;
+
+ if ( info->params.data_bits != 8 )
+ RegValue |= BIT4+BIT3+BIT2;
+
+ if ( info->params.parity != ASYNC_PARITY_NONE ) {
+ RegValue |= BIT5;
+ if ( info->params.parity != ASYNC_PARITY_ODD )
+ RegValue |= BIT6;
+ }
+
+ usc_OutReg( info, TMR, RegValue );
+
+ usc_set_txidle( info );
+
+
+ /* Set IRQ trigger level */
+
+ usc_TCmd( info, TCmd_SelectTicrIntLevel );
+
+
+ /* Transmit Interrupt Control Register (TICR)
+ *
+ * <15..8> ? Transmit FIFO IRQ Level
+ * <7> 0 Present IA (Interrupt Arm)
+ * <6> 1 Idle Sent IA
+ * <5> 0 Abort Sent IA
+ * <4> 0 EOF/EOM Sent IA
+ * <3> 0 CRC Sent IA
+ * <2> 0 1 = Wait for SW Trigger to Start Frame
+ * <1> 0 Tx Underrun IA
+ * <0> 0 TC0 constant on read back
+ *
+ * 0000 0000 0100 0000 = 0x0040
+ */
+
+ usc_OutReg( info, TICR, 0x1f40 );
+
+ usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
+ usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
+
+ usc_enable_async_clock( info, info->params.data_rate );
+
+
+ /* Channel Control/status Register (CCSR)
+ *
+ * <15> X RCC FIFO Overflow status (RO)
+ * <14> X RCC FIFO Not Empty status (RO)
+ * <13> 0 1 = Clear RCC FIFO (WO)
+ * <12> X DPLL in Sync status (RO)
+ * <11> X DPLL 2 Missed Clocks status (RO)
+ * <10> X DPLL 1 Missed Clock status (RO)
+ * <9..8> 00 DPLL Resync on rising and falling edges (RW)
+ * <7> X SDLC Loop On status (RO)
+ * <6> X SDLC Loop Send status (RO)
+ * <5> 1 Bypass counters for TxClk and RxClk (RW)
+ * <4..2> 000 Last Char of SDLC frame has 8 bits (RW)
+ * <1..0> 00 reserved
+ *
+ * 0000 0000 0010 0000 = 0x0020
+ */
+
+ usc_OutReg( info, CCSR, 0x0020 );
+
+ usc_DisableInterrupts( info, TRANSMIT_STATUS + TRANSMIT_DATA +
+ RECEIVE_DATA + RECEIVE_STATUS );
+
+ usc_ClearIrqPendingBits( info, TRANSMIT_STATUS + TRANSMIT_DATA +
+ RECEIVE_DATA + RECEIVE_STATUS );
+
+ usc_EnableMasterIrqBit( info );
+
+ if (info->bus_type == MGSL_BUS_TYPE_ISA) {
+ /* Enable INTEN (Port 6, Bit12) */
+ /* This connects the IRQ request signal to the ISA bus */
+ usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12));
+ }
+
+ if (info->params.loopback) {
+ info->loopback_bits = 0x300;
+ outw(0x0300, info->io_base + CCAR);
+ }
+
+} /* end of usc_set_async_mode() */
+
+/* usc_loopback_frame()
+ *
+ * Loop back a small (2 byte) dummy SDLC frame.
+ * Interrupts and DMA are NOT used. The purpose of this is to
+ * clear any 'stale' status info left over from running in async mode.
+ *
+ * The 16C32 shows the strange behaviour of marking the 1st
+ * received SDLC frame with a CRC error even when there is no
+ * CRC error. To get around this a small dummy from of 2 bytes
+ * is looped back when switching from async to sync mode.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void usc_loopback_frame( struct mgsl_struct *info )
+{
+ int i;
+ unsigned long oldmode = info->params.mode;
+
+ info->params.mode = MGSL_MODE_HDLC;
+
+ usc_DisableMasterIrqBit( info );
+
+ usc_set_sdlc_mode( info );
+ usc_enable_loopback( info, 1 );
+
+ /* Write 16-bit Time Constant for BRG0 */
+ usc_OutReg( info, TC0R, 0 );
+
+ /* Channel Control Register (CCR)
+ *
+ * <15..14> 00 Don't use 32-bit Tx Control Blocks (TCBs)
+ * <13> 0 Trigger Tx on SW Command Disabled
+ * <12> 0 Flag Preamble Disabled
+ * <11..10> 00 Preamble Length = 8-Bits
+ * <9..8> 01 Preamble Pattern = flags
+ * <7..6> 10 Don't use 32-bit Rx status Blocks (RSBs)
+ * <5> 0 Trigger Rx on SW Command Disabled
+ * <4..0> 0 reserved
+ *
+ * 0000 0001 0000 0000 = 0x0100
+ */
+
+ usc_OutReg( info, CCR, 0x0100 );
+
+ /* SETUP RECEIVER */
+ usc_RTCmd( info, RTCmd_PurgeRxFifo );
+ usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
+
+ /* SETUP TRANSMITTER */
+ /* Program the Transmit Character Length Register (TCLR) */
+ /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */
+ usc_OutReg( info, TCLR, 2 );
+ usc_RTCmd( info, RTCmd_PurgeTxFifo );
+
+ /* unlatch Tx status bits, and start transmit channel. */
+ usc_UnlatchTxstatusBits(info,TXSTATUS_ALL);
+ outw(0,info->io_base + DATAREG);
+
+ /* ENABLE TRANSMITTER */
+ usc_TCmd( info, TCmd_SendFrame );
+ usc_EnableTransmitter(info,ENABLE_UNCONDITIONAL);
+
+ /* WAIT FOR RECEIVE COMPLETE */
+ for (i=0 ; i<1000 ; i++)
+ if (usc_InReg( info, RCSR ) & (BIT8 + BIT4 + BIT3 + BIT1))
+ break;
+
+ /* clear Internal Data loopback mode */
+ usc_enable_loopback(info, 0);
+
+ usc_EnableMasterIrqBit(info);
+
+ info->params.mode = oldmode;
+
+} /* end of usc_loopback_frame() */
+
+/* usc_set_sync_mode() Programs the USC for SDLC communications.
+ *
+ * Arguments: info pointer to adapter info structure
+ * Return Value: None
+ */
+static void usc_set_sync_mode( struct mgsl_struct *info )
+{
+ usc_loopback_frame( info );
+ usc_set_sdlc_mode( info );
+
+ if (info->bus_type == MGSL_BUS_TYPE_ISA) {
+ /* Enable INTEN (Port 6, Bit12) */
+ /* This connects the IRQ request signal to the ISA bus */
+ usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12));
+ }
+
+ usc_enable_aux_clock(info, info->params.clock_speed);
+
+ if (info->params.loopback)
+ usc_enable_loopback(info,1);
+
+} /* end of mgsl_set_sync_mode() */
+
+/* usc_set_txidle() Set the HDLC idle mode for the transmitter.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void usc_set_txidle( struct mgsl_struct *info )
+{
+ u16 usc_idle_mode = IDLEMODE_FLAGS;
+
+ /* Map API idle mode to USC register bits */
+
+ switch( info->idle_mode ){
+ case HDLC_TXIDLE_FLAGS: usc_idle_mode = IDLEMODE_FLAGS; break;
+ case HDLC_TXIDLE_ALT_ZEROS_ONES: usc_idle_mode = IDLEMODE_ALT_ONE_ZERO; break;
+ case HDLC_TXIDLE_ZEROS: usc_idle_mode = IDLEMODE_ZERO; break;
+ case HDLC_TXIDLE_ONES: usc_idle_mode = IDLEMODE_ONE; break;
+ case HDLC_TXIDLE_ALT_MARK_SPACE: usc_idle_mode = IDLEMODE_ALT_MARK_SPACE; break;
+ case HDLC_TXIDLE_SPACE: usc_idle_mode = IDLEMODE_SPACE; break;
+ case HDLC_TXIDLE_MARK: usc_idle_mode = IDLEMODE_MARK; break;
+ }
+
+ info->usc_idle_mode = usc_idle_mode;
+ //usc_OutReg(info, TCSR, usc_idle_mode);
+ info->tcsr_value &= ~IDLEMODE_MASK; /* clear idle mode bits */
+ info->tcsr_value += usc_idle_mode;
+ usc_OutReg(info, TCSR, info->tcsr_value);
+
+ /*
+ * if SyncLink WAN adapter is running in external sync mode, the
+ * transmitter has been set to Monosync in order to try to mimic
+ * a true raw outbound bit stream. Monosync still sends an open/close
+ * sync char at the start/end of a frame. Try to match those sync
+ * patterns to the idle mode set here
+ */
+ if ( info->params.mode == MGSL_MODE_RAW ) {
+ unsigned char syncpat = 0;
+ switch( info->idle_mode ) {
+ case HDLC_TXIDLE_FLAGS:
+ syncpat = 0x7e;
+ break;
+ case HDLC_TXIDLE_ALT_ZEROS_ONES:
+ syncpat = 0x55;
+ break;
+ case HDLC_TXIDLE_ZEROS:
+ case HDLC_TXIDLE_SPACE:
+ syncpat = 0x00;
+ break;
+ case HDLC_TXIDLE_ONES:
+ case HDLC_TXIDLE_MARK:
+ syncpat = 0xff;
+ break;
+ case HDLC_TXIDLE_ALT_MARK_SPACE:
+ syncpat = 0xaa;
+ break;
+ }
+
+ usc_SetTransmitSyncChars(info,syncpat,syncpat);
+ }
+
+} /* end of usc_set_txidle() */
+
+/* usc_get_serial_signals()
+ *
+ * Query the adapter for the state of the V24 status (input) signals.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void usc_get_serial_signals( struct mgsl_struct *info )
+{
+ u16 status;
+
+ /* clear all serial signals except DTR and RTS */
+ info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
+
+ /* Read the Misc Interrupt status Register (MISR) to get */
+ /* the V24 status signals. */
+
+ status = usc_InReg( info, MISR );
+
+ /* set serial signal bits to reflect MISR */
+
+ if ( status & MISCSTATUS_CTS )
+ info->serial_signals |= SerialSignal_CTS;
+
+ if ( status & MISCSTATUS_DCD )
+ info->serial_signals |= SerialSignal_DCD;
+
+ if ( status & MISCSTATUS_RI )
+ info->serial_signals |= SerialSignal_RI;
+
+ if ( status & MISCSTATUS_DSR )
+ info->serial_signals |= SerialSignal_DSR;
+
+} /* end of usc_get_serial_signals() */
+
+/* usc_set_serial_signals()
+ *
+ * Set the state of DTR and RTS based on contents of
+ * serial_signals member of device extension.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void usc_set_serial_signals( struct mgsl_struct *info )
+{
+ u16 Control;
+ unsigned char V24Out = info->serial_signals;
+
+ /* get the current value of the Port Control Register (PCR) */
+
+ Control = usc_InReg( info, PCR );
+
+ if ( V24Out & SerialSignal_RTS )
+ Control &= ~(BIT6);
+ else
+ Control |= BIT6;
+
+ if ( V24Out & SerialSignal_DTR )
+ Control &= ~(BIT4);
+ else
+ Control |= BIT4;
+
+ usc_OutReg( info, PCR, Control );
+
+} /* end of usc_set_serial_signals() */
+
+/* usc_enable_async_clock()
+ *
+ * Enable the async clock at the specified frequency.
+ *
+ * Arguments: info pointer to device instance data
+ * data_rate data rate of clock in bps
+ * 0 disables the AUX clock.
+ * Return Value: None
+ */
+static void usc_enable_async_clock( struct mgsl_struct *info, u32 data_rate )
+{
+ if ( data_rate ) {
+ /*
+ * Clock mode Control Register (CMCR)
+ *
+ * <15..14> 00 counter 1 Disabled
+ * <13..12> 00 counter 0 Disabled
+ * <11..10> 11 BRG1 Input is TxC Pin
+ * <9..8> 11 BRG0 Input is TxC Pin
+ * <7..6> 01 DPLL Input is BRG1 Output
+ * <5..3> 100 TxCLK comes from BRG0
+ * <2..0> 100 RxCLK comes from BRG0
+ *
+ * 0000 1111 0110 0100 = 0x0f64
+ */
+
+ usc_OutReg( info, CMCR, 0x0f64 );
+
+
+ /*
+ * Write 16-bit Time Constant for BRG0
+ * Time Constant = (ClkSpeed / data_rate) - 1
+ * ClkSpeed = 921600 (ISA), 691200 (PCI)
+ */
+
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI )
+ usc_OutReg( info, TC0R, (u16)((691200/data_rate) - 1) );
+ else
+ usc_OutReg( info, TC0R, (u16)((921600/data_rate) - 1) );
+
+
+ /*
+ * Hardware Configuration Register (HCR)
+ * Clear Bit 1, BRG0 mode = Continuous
+ * Set Bit 0 to enable BRG0.
+ */
+
+ usc_OutReg( info, HCR,
+ (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) );
+
+
+ /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */
+
+ usc_OutReg( info, IOCR,
+ (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004) );
+ } else {
+ /* data rate == 0 so turn off BRG0 */
+ usc_OutReg( info, HCR, (u16)(usc_InReg( info, HCR ) & ~BIT0) );
+ }
+
+} /* end of usc_enable_async_clock() */
+
+/*
+ * Buffer Structures:
+ *
+ * Normal memory access uses virtual addresses that can make discontiguous
+ * physical memory pages appear to be contiguous in the virtual address
+ * space (the processors memory mapping handles the conversions).
+ *
+ * DMA transfers require physically contiguous memory. This is because
+ * the DMA system controller and DMA bus masters deal with memory using
+ * only physical addresses.
+ *
+ * This causes a problem under Windows NT when large DMA buffers are
+ * needed. Fragmentation of the nonpaged pool prevents allocations of
+ * physically contiguous buffers larger than the PAGE_SIZE.
+ *
+ * However the 16C32 supports Bus Master Scatter/Gather DMA which
+ * allows DMA transfers to physically discontiguous buffers. Information
+ * about each data transfer buffer is contained in a memory structure
+ * called a 'buffer entry'. A list of buffer entries is maintained
+ * to track and control the use of the data transfer buffers.
+ *
+ * To support this strategy we will allocate sufficient PAGE_SIZE
+ * contiguous memory buffers to allow for the total required buffer
+ * space.
+ *
+ * The 16C32 accesses the list of buffer entries using Bus Master
+ * DMA. Control information is read from the buffer entries by the
+ * 16C32 to control data transfers. status information is written to
+ * the buffer entries by the 16C32 to indicate the status of completed
+ * transfers.
+ *
+ * The CPU writes control information to the buffer entries to control
+ * the 16C32 and reads status information from the buffer entries to
+ * determine information about received and transmitted frames.
+ *
+ * Because the CPU and 16C32 (adapter) both need simultaneous access
+ * to the buffer entries, the buffer entry memory is allocated with
+ * HalAllocateCommonBuffer(). This restricts the size of the buffer
+ * entry list to PAGE_SIZE.
+ *
+ * The actual data buffers on the other hand will only be accessed
+ * by the CPU or the adapter but not by both simultaneously. This allows
+ * Scatter/Gather packet based DMA procedures for using physically
+ * discontiguous pages.
+ */
+
+/*
+ * mgsl_reset_tx_dma_buffers()
+ *
+ * Set the count for all transmit buffers to 0 to indicate the
+ * buffer is available for use and set the current buffer to the
+ * first buffer. This effectively makes all buffers free and
+ * discards any data in buffers.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void mgsl_reset_tx_dma_buffers( struct mgsl_struct *info )
+{
+ unsigned int i;
+
+ for ( i = 0; i < info->tx_buffer_count; i++ ) {
+ *((unsigned long *)&(info->tx_buffer_list[i].count)) = 0;
+ }
+
+ info->current_tx_buffer = 0;
+ info->start_tx_dma_buffer = 0;
+ info->tx_dma_buffers_used = 0;
+
+ info->get_tx_holding_index = 0;
+ info->put_tx_holding_index = 0;
+ info->tx_holding_count = 0;
+
+} /* end of mgsl_reset_tx_dma_buffers() */
+
+/*
+ * num_free_tx_dma_buffers()
+ *
+ * returns the number of free tx dma buffers available
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: number of free tx dma buffers
+ */
+static int num_free_tx_dma_buffers(struct mgsl_struct *info)
+{
+ return info->tx_buffer_count - info->tx_dma_buffers_used;
+}
+
+/*
+ * mgsl_reset_rx_dma_buffers()
+ *
+ * Set the count for all receive buffers to DMABUFFERSIZE
+ * and set the current buffer to the first buffer. This effectively
+ * makes all buffers free and discards any data in buffers.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: None
+ */
+static void mgsl_reset_rx_dma_buffers( struct mgsl_struct *info )
+{
+ unsigned int i;
+
+ for ( i = 0; i < info->rx_buffer_count; i++ ) {
+ *((unsigned long *)&(info->rx_buffer_list[i].count)) = DMABUFFERSIZE;
+// info->rx_buffer_list[i].count = DMABUFFERSIZE;
+// info->rx_buffer_list[i].status = 0;
+ }
+
+ info->current_rx_buffer = 0;
+
+} /* end of mgsl_reset_rx_dma_buffers() */
+
+/*
+ * mgsl_free_rx_frame_buffers()
+ *
+ * Free the receive buffers used by a received SDLC
+ * frame such that the buffers can be reused.
+ *
+ * Arguments:
+ *
+ * info pointer to device instance data
+ * StartIndex index of 1st receive buffer of frame
+ * EndIndex index of last receive buffer of frame
+ *
+ * Return Value: None
+ */
+static void mgsl_free_rx_frame_buffers( struct mgsl_struct *info, unsigned int StartIndex, unsigned int EndIndex )
+{
+ bool Done = false;
+ DMABUFFERENTRY *pBufEntry;
+ unsigned int Index;
+
+ /* Starting with 1st buffer entry of the frame clear the status */
+ /* field and set the count field to DMA Buffer Size. */
+
+ Index = StartIndex;
+
+ while( !Done ) {
+ pBufEntry = &(info->rx_buffer_list[Index]);
+
+ if ( Index == EndIndex ) {
+ /* This is the last buffer of the frame! */
+ Done = true;
+ }
+
+ /* reset current buffer for reuse */
+// pBufEntry->status = 0;
+// pBufEntry->count = DMABUFFERSIZE;
+ *((unsigned long *)&(pBufEntry->count)) = DMABUFFERSIZE;
+
+ /* advance to next buffer entry in linked list */
+ Index++;
+ if ( Index == info->rx_buffer_count )
+ Index = 0;
+ }
+
+ /* set current buffer to next buffer after last buffer of frame */
+ info->current_rx_buffer = Index;
+
+} /* end of free_rx_frame_buffers() */
+
+/* mgsl_get_rx_frame()
+ *
+ * This function attempts to return a received SDLC frame from the
+ * receive DMA buffers. Only frames received without errors are returned.
+ *
+ * Arguments: info pointer to device extension
+ * Return Value: true if frame returned, otherwise false
+ */
+static bool mgsl_get_rx_frame(struct mgsl_struct *info)
+{
+ unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */
+ unsigned short status;
+ DMABUFFERENTRY *pBufEntry;
+ unsigned int framesize = 0;
+ bool ReturnCode = false;
+ unsigned long flags;
+ struct tty_struct *tty = info->port.tty;
+ bool return_frame = false;
+
+ /*
+ * current_rx_buffer points to the 1st buffer of the next available
+ * receive frame. To find the last buffer of the frame look for
+ * a non-zero status field in the buffer entries. (The status
+ * field is set by the 16C32 after completing a receive frame.
+ */
+
+ StartIndex = EndIndex = info->current_rx_buffer;
+
+ while( !info->rx_buffer_list[EndIndex].status ) {
+ /*
+ * If the count field of the buffer entry is non-zero then
+ * this buffer has not been used. (The 16C32 clears the count
+ * field when it starts using the buffer.) If an unused buffer
+ * is encountered then there are no frames available.
+ */
+
+ if ( info->rx_buffer_list[EndIndex].count )
+ goto Cleanup;
+
+ /* advance to next buffer entry in linked list */
+ EndIndex++;
+ if ( EndIndex == info->rx_buffer_count )
+ EndIndex = 0;
+
+ /* if entire list searched then no frame available */
+ if ( EndIndex == StartIndex ) {
+ /* If this occurs then something bad happened,
+ * all buffers have been 'used' but none mark
+ * the end of a frame. Reset buffers and receiver.
+ */
+
+ if ( info->rx_enabled ){
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_start_receiver(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ }
+ goto Cleanup;
+ }
+ }
+
+
+ /* check status of receive frame */
+
+ status = info->rx_buffer_list[EndIndex].status;
+
+ if ( status & (RXSTATUS_SHORT_FRAME + RXSTATUS_OVERRUN +
+ RXSTATUS_CRC_ERROR + RXSTATUS_ABORT) ) {
+ if ( status & RXSTATUS_SHORT_FRAME )
+ info->icount.rxshort++;
+ else if ( status & RXSTATUS_ABORT )
+ info->icount.rxabort++;
+ else if ( status & RXSTATUS_OVERRUN )
+ info->icount.rxover++;
+ else {
+ info->icount.rxcrc++;
+ if ( info->params.crc_type & HDLC_CRC_RETURN_EX )
+ return_frame = true;
+ }
+ framesize = 0;
+#if SYNCLINK_GENERIC_HDLC
+ {
+ info->netdev->stats.rx_errors++;
+ info->netdev->stats.rx_frame_errors++;
+ }
+#endif
+ } else
+ return_frame = true;
+
+ if ( return_frame ) {
+ /* receive frame has no errors, get frame size.
+ * The frame size is the starting value of the RCC (which was
+ * set to 0xffff) minus the ending value of the RCC (decremented
+ * once for each receive character) minus 2 for the 16-bit CRC.
+ */
+
+ framesize = RCLRVALUE - info->rx_buffer_list[EndIndex].rcc;
+
+ /* adjust frame size for CRC if any */
+ if ( info->params.crc_type == HDLC_CRC_16_CCITT )
+ framesize -= 2;
+ else if ( info->params.crc_type == HDLC_CRC_32_CCITT )
+ framesize -= 4;
+ }
+
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk("%s(%d):mgsl_get_rx_frame(%s) status=%04X size=%d\n",
+ __FILE__,__LINE__,info->device_name,status,framesize);
+
+ if ( debug_level >= DEBUG_LEVEL_DATA )
+ mgsl_trace_block(info,info->rx_buffer_list[StartIndex].virt_addr,
+ min_t(int, framesize, DMABUFFERSIZE),0);
+
+ if (framesize) {
+ if ( ( (info->params.crc_type & HDLC_CRC_RETURN_EX) &&
+ ((framesize+1) > info->max_frame_size) ) ||
+ (framesize > info->max_frame_size) )
+ info->icount.rxlong++;
+ else {
+ /* copy dma buffer(s) to contiguous intermediate buffer */
+ int copy_count = framesize;
+ int index = StartIndex;
+ unsigned char *ptmp = info->intermediate_rxbuffer;
+
+ if ( !(status & RXSTATUS_CRC_ERROR))
+ info->icount.rxok++;
+
+ while(copy_count) {
+ int partial_count;
+ if ( copy_count > DMABUFFERSIZE )
+ partial_count = DMABUFFERSIZE;
+ else
+ partial_count = copy_count;
+
+ pBufEntry = &(info->rx_buffer_list[index]);
+ memcpy( ptmp, pBufEntry->virt_addr, partial_count );
+ ptmp += partial_count;
+ copy_count -= partial_count;
+
+ if ( ++index == info->rx_buffer_count )
+ index = 0;
+ }
+
+ if ( info->params.crc_type & HDLC_CRC_RETURN_EX ) {
+ ++framesize;
+ *ptmp = (status & RXSTATUS_CRC_ERROR ?
+ RX_CRC_ERROR :
+ RX_OK);
+
+ if ( debug_level >= DEBUG_LEVEL_DATA )
+ printk("%s(%d):mgsl_get_rx_frame(%s) rx frame status=%d\n",
+ __FILE__,__LINE__,info->device_name,
+ *ptmp);
+ }
+
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount)
+ hdlcdev_rx(info,info->intermediate_rxbuffer,framesize);
+ else
+#endif
+ ldisc_receive_buf(tty, info->intermediate_rxbuffer, info->flag_buf, framesize);
+ }
+ }
+ /* Free the buffers used by this frame. */
+ mgsl_free_rx_frame_buffers( info, StartIndex, EndIndex );
+
+ ReturnCode = true;
+
+Cleanup:
+
+ if ( info->rx_enabled && info->rx_overflow ) {
+ /* The receiver needs to restarted because of
+ * a receive overflow (buffer or FIFO). If the
+ * receive buffers are now empty, then restart receiver.
+ */
+
+ if ( !info->rx_buffer_list[EndIndex].status &&
+ info->rx_buffer_list[EndIndex].count ) {
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_start_receiver(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ }
+ }
+
+ return ReturnCode;
+
+} /* end of mgsl_get_rx_frame() */
+
+/* mgsl_get_raw_rx_frame()
+ *
+ * This function attempts to return a received frame from the
+ * receive DMA buffers when running in external loop mode. In this mode,
+ * we will return at most one DMABUFFERSIZE frame to the application.
+ * The USC receiver is triggering off of DCD going active to start a new
+ * frame, and DCD going inactive to terminate the frame (similar to
+ * processing a closing flag character).
+ *
+ * In this routine, we will return DMABUFFERSIZE "chunks" at a time.
+ * If DCD goes inactive, the last Rx DMA Buffer will have a non-zero
+ * status field and the RCC field will indicate the length of the
+ * entire received frame. We take this RCC field and get the modulus
+ * of RCC and DMABUFFERSIZE to determine if number of bytes in the
+ * last Rx DMA buffer and return that last portion of the frame.
+ *
+ * Arguments: info pointer to device extension
+ * Return Value: true if frame returned, otherwise false
+ */
+static bool mgsl_get_raw_rx_frame(struct mgsl_struct *info)
+{
+ unsigned int CurrentIndex, NextIndex;
+ unsigned short status;
+ DMABUFFERENTRY *pBufEntry;
+ unsigned int framesize = 0;
+ bool ReturnCode = false;
+ unsigned long flags;
+ struct tty_struct *tty = info->port.tty;
+
+ /*
+ * current_rx_buffer points to the 1st buffer of the next available
+ * receive frame. The status field is set by the 16C32 after
+ * completing a receive frame. If the status field of this buffer
+ * is zero, either the USC is still filling this buffer or this
+ * is one of a series of buffers making up a received frame.
+ *
+ * If the count field of this buffer is zero, the USC is either
+ * using this buffer or has used this buffer. Look at the count
+ * field of the next buffer. If that next buffer's count is
+ * non-zero, the USC is still actively using the current buffer.
+ * Otherwise, if the next buffer's count field is zero, the
+ * current buffer is complete and the USC is using the next
+ * buffer.
+ */
+ CurrentIndex = NextIndex = info->current_rx_buffer;
+ ++NextIndex;
+ if ( NextIndex == info->rx_buffer_count )
+ NextIndex = 0;
+
+ if ( info->rx_buffer_list[CurrentIndex].status != 0 ||
+ (info->rx_buffer_list[CurrentIndex].count == 0 &&
+ info->rx_buffer_list[NextIndex].count == 0)) {
+ /*
+ * Either the status field of this dma buffer is non-zero
+ * (indicating the last buffer of a receive frame) or the next
+ * buffer is marked as in use -- implying this buffer is complete
+ * and an intermediate buffer for this received frame.
+ */
+
+ status = info->rx_buffer_list[CurrentIndex].status;
+
+ if ( status & (RXSTATUS_SHORT_FRAME + RXSTATUS_OVERRUN +
+ RXSTATUS_CRC_ERROR + RXSTATUS_ABORT) ) {
+ if ( status & RXSTATUS_SHORT_FRAME )
+ info->icount.rxshort++;
+ else if ( status & RXSTATUS_ABORT )
+ info->icount.rxabort++;
+ else if ( status & RXSTATUS_OVERRUN )
+ info->icount.rxover++;
+ else
+ info->icount.rxcrc++;
+ framesize = 0;
+ } else {
+ /*
+ * A receive frame is available, get frame size and status.
+ *
+ * The frame size is the starting value of the RCC (which was
+ * set to 0xffff) minus the ending value of the RCC (decremented
+ * once for each receive character) minus 2 or 4 for the 16-bit
+ * or 32-bit CRC.
+ *
+ * If the status field is zero, this is an intermediate buffer.
+ * It's size is 4K.
+ *
+ * If the DMA Buffer Entry's Status field is non-zero, the
+ * receive operation completed normally (ie: DCD dropped). The
+ * RCC field is valid and holds the received frame size.
+ * It is possible that the RCC field will be zero on a DMA buffer
+ * entry with a non-zero status. This can occur if the total
+ * frame size (number of bytes between the time DCD goes active
+ * to the time DCD goes inactive) exceeds 65535 bytes. In this
+ * case the 16C32 has underrun on the RCC count and appears to
+ * stop updating this counter to let us know the actual received
+ * frame size. If this happens (non-zero status and zero RCC),
+ * simply return the entire RxDMA Buffer
+ */
+ if ( status ) {
+ /*
+ * In the event that the final RxDMA Buffer is
+ * terminated with a non-zero status and the RCC
+ * field is zero, we interpret this as the RCC
+ * having underflowed (received frame > 65535 bytes).
+ *
+ * Signal the event to the user by passing back
+ * a status of RxStatus_CrcError returning the full
+ * buffer and let the app figure out what data is
+ * actually valid
+ */
+ if ( info->rx_buffer_list[CurrentIndex].rcc )
+ framesize = RCLRVALUE - info->rx_buffer_list[CurrentIndex].rcc;
+ else
+ framesize = DMABUFFERSIZE;
+ }
+ else
+ framesize = DMABUFFERSIZE;
+ }
+
+ if ( framesize > DMABUFFERSIZE ) {
+ /*
+ * if running in raw sync mode, ISR handler for
+ * End Of Buffer events terminates all buffers at 4K.
+ * If this frame size is said to be >4K, get the
+ * actual number of bytes of the frame in this buffer.
+ */
+ framesize = framesize % DMABUFFERSIZE;
+ }
+
+
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk("%s(%d):mgsl_get_raw_rx_frame(%s) status=%04X size=%d\n",
+ __FILE__,__LINE__,info->device_name,status,framesize);
+
+ if ( debug_level >= DEBUG_LEVEL_DATA )
+ mgsl_trace_block(info,info->rx_buffer_list[CurrentIndex].virt_addr,
+ min_t(int, framesize, DMABUFFERSIZE),0);
+
+ if (framesize) {
+ /* copy dma buffer(s) to contiguous intermediate buffer */
+ /* NOTE: we never copy more than DMABUFFERSIZE bytes */
+
+ pBufEntry = &(info->rx_buffer_list[CurrentIndex]);
+ memcpy( info->intermediate_rxbuffer, pBufEntry->virt_addr, framesize);
+ info->icount.rxok++;
+
+ ldisc_receive_buf(tty, info->intermediate_rxbuffer, info->flag_buf, framesize);
+ }
+
+ /* Free the buffers used by this frame. */
+ mgsl_free_rx_frame_buffers( info, CurrentIndex, CurrentIndex );
+
+ ReturnCode = true;
+ }
+
+
+ if ( info->rx_enabled && info->rx_overflow ) {
+ /* The receiver needs to restarted because of
+ * a receive overflow (buffer or FIFO). If the
+ * receive buffers are now empty, then restart receiver.
+ */
+
+ if ( !info->rx_buffer_list[CurrentIndex].status &&
+ info->rx_buffer_list[CurrentIndex].count ) {
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_start_receiver(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ }
+ }
+
+ return ReturnCode;
+
+} /* end of mgsl_get_raw_rx_frame() */
+
+/* mgsl_load_tx_dma_buffer()
+ *
+ * Load the transmit DMA buffer with the specified data.
+ *
+ * Arguments:
+ *
+ * info pointer to device extension
+ * Buffer pointer to buffer containing frame to load
+ * BufferSize size in bytes of frame in Buffer
+ *
+ * Return Value: None
+ */
+static void mgsl_load_tx_dma_buffer(struct mgsl_struct *info,
+ const char *Buffer, unsigned int BufferSize)
+{
+ unsigned short Copycount;
+ unsigned int i = 0;
+ DMABUFFERENTRY *pBufEntry;
+
+ if ( debug_level >= DEBUG_LEVEL_DATA )
+ mgsl_trace_block(info,Buffer, min_t(int, BufferSize, DMABUFFERSIZE), 1);
+
+ if (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) {
+ /* set CMR:13 to start transmit when
+ * next GoAhead (abort) is received
+ */
+ info->cmr_value |= BIT13;
+ }
+
+ /* begin loading the frame in the next available tx dma
+ * buffer, remember it's starting location for setting
+ * up tx dma operation
+ */
+ i = info->current_tx_buffer;
+ info->start_tx_dma_buffer = i;
+
+ /* Setup the status and RCC (Frame Size) fields of the 1st */
+ /* buffer entry in the transmit DMA buffer list. */
+
+ info->tx_buffer_list[i].status = info->cmr_value & 0xf000;
+ info->tx_buffer_list[i].rcc = BufferSize;
+ info->tx_buffer_list[i].count = BufferSize;
+
+ /* Copy frame data from 1st source buffer to the DMA buffers. */
+ /* The frame data may span multiple DMA buffers. */
+
+ while( BufferSize ){
+ /* Get a pointer to next DMA buffer entry. */
+ pBufEntry = &info->tx_buffer_list[i++];
+
+ if ( i == info->tx_buffer_count )
+ i=0;
+
+ /* Calculate the number of bytes that can be copied from */
+ /* the source buffer to this DMA buffer. */
+ if ( BufferSize > DMABUFFERSIZE )
+ Copycount = DMABUFFERSIZE;
+ else
+ Copycount = BufferSize;
+
+ /* Actually copy data from source buffer to DMA buffer. */
+ /* Also set the data count for this individual DMA buffer. */
+ if ( info->bus_type == MGSL_BUS_TYPE_PCI )
+ mgsl_load_pci_memory(pBufEntry->virt_addr, Buffer,Copycount);
+ else
+ memcpy(pBufEntry->virt_addr, Buffer, Copycount);
+
+ pBufEntry->count = Copycount;
+
+ /* Advance source pointer and reduce remaining data count. */
+ Buffer += Copycount;
+ BufferSize -= Copycount;
+
+ ++info->tx_dma_buffers_used;
+ }
+
+ /* remember next available tx dma buffer */
+ info->current_tx_buffer = i;
+
+} /* end of mgsl_load_tx_dma_buffer() */
+
+/*
+ * mgsl_register_test()
+ *
+ * Performs a register test of the 16C32.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: true if test passed, otherwise false
+ */
+static bool mgsl_register_test( struct mgsl_struct *info )
+{
+ static unsigned short BitPatterns[] =
+ { 0x0000, 0xffff, 0xaaaa, 0x5555, 0x1234, 0x6969, 0x9696, 0x0f0f };
+ static unsigned int Patterncount = ARRAY_SIZE(BitPatterns);
+ unsigned int i;
+ bool rc = true;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_reset(info);
+
+ /* Verify the reset state of some registers. */
+
+ if ( (usc_InReg( info, SICR ) != 0) ||
+ (usc_InReg( info, IVR ) != 0) ||
+ (usc_InDmaReg( info, DIVR ) != 0) ){
+ rc = false;
+ }
+
+ if ( rc ){
+ /* Write bit patterns to various registers but do it out of */
+ /* sync, then read back and verify values. */
+
+ for ( i = 0 ; i < Patterncount ; i++ ) {
+ usc_OutReg( info, TC0R, BitPatterns[i] );
+ usc_OutReg( info, TC1R, BitPatterns[(i+1)%Patterncount] );
+ usc_OutReg( info, TCLR, BitPatterns[(i+2)%Patterncount] );
+ usc_OutReg( info, RCLR, BitPatterns[(i+3)%Patterncount] );
+ usc_OutReg( info, RSR, BitPatterns[(i+4)%Patterncount] );
+ usc_OutDmaReg( info, TBCR, BitPatterns[(i+5)%Patterncount] );
+
+ if ( (usc_InReg( info, TC0R ) != BitPatterns[i]) ||
+ (usc_InReg( info, TC1R ) != BitPatterns[(i+1)%Patterncount]) ||
+ (usc_InReg( info, TCLR ) != BitPatterns[(i+2)%Patterncount]) ||
+ (usc_InReg( info, RCLR ) != BitPatterns[(i+3)%Patterncount]) ||
+ (usc_InReg( info, RSR ) != BitPatterns[(i+4)%Patterncount]) ||
+ (usc_InDmaReg( info, TBCR ) != BitPatterns[(i+5)%Patterncount]) ){
+ rc = false;
+ break;
+ }
+ }
+ }
+
+ usc_reset(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ return rc;
+
+} /* end of mgsl_register_test() */
+
+/* mgsl_irq_test() Perform interrupt test of the 16C32.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: true if test passed, otherwise false
+ */
+static bool mgsl_irq_test( struct mgsl_struct *info )
+{
+ unsigned long EndTime;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_reset(info);
+
+ /*
+ * Setup 16C32 to interrupt on TxC pin (14MHz clock) transition.
+ * The ISR sets irq_occurred to true.
+ */
+
+ info->irq_occurred = false;
+
+ /* Enable INTEN gate for ISA adapter (Port 6, Bit12) */
+ /* Enable INTEN (Port 6, Bit12) */
+ /* This connects the IRQ request signal to the ISA bus */
+ /* on the ISA adapter. This has no effect for the PCI adapter */
+ usc_OutReg( info, PCR, (unsigned short)((usc_InReg(info, PCR) | BIT13) & ~BIT12) );
+
+ usc_EnableMasterIrqBit(info);
+ usc_EnableInterrupts(info, IO_PIN);
+ usc_ClearIrqPendingBits(info, IO_PIN);
+
+ usc_UnlatchIostatusBits(info, MISCSTATUS_TXC_LATCHED);
+ usc_EnableStatusIrqs(info, SICR_TXC_ACTIVE + SICR_TXC_INACTIVE);
+
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ EndTime=100;
+ while( EndTime-- && !info->irq_occurred ) {
+ msleep_interruptible(10);
+ }
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_reset(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ return info->irq_occurred;
+
+} /* end of mgsl_irq_test() */
+
+/* mgsl_dma_test()
+ *
+ * Perform a DMA test of the 16C32. A small frame is
+ * transmitted via DMA from a transmit buffer to a receive buffer
+ * using single buffer DMA mode.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: true if test passed, otherwise false
+ */
+static bool mgsl_dma_test( struct mgsl_struct *info )
+{
+ unsigned short FifoLevel;
+ unsigned long phys_addr;
+ unsigned int FrameSize;
+ unsigned int i;
+ char *TmpPtr;
+ bool rc = true;
+ unsigned short status=0;
+ unsigned long EndTime;
+ unsigned long flags;
+ MGSL_PARAMS tmp_params;
+
+ /* save current port options */
+ memcpy(&tmp_params,&info->params,sizeof(MGSL_PARAMS));
+ /* load default port options */
+ memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
+
+#define TESTFRAMESIZE 40
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+
+ /* setup 16C32 for SDLC DMA transfer mode */
+
+ usc_reset(info);
+ usc_set_sdlc_mode(info);
+ usc_enable_loopback(info,1);
+
+ /* Reprogram the RDMR so that the 16C32 does NOT clear the count
+ * field of the buffer entry after fetching buffer address. This
+ * way we can detect a DMA failure for a DMA read (which should be
+ * non-destructive to system memory) before we try and write to
+ * memory (where a failure could corrupt system memory).
+ */
+
+ /* Receive DMA mode Register (RDMR)
+ *
+ * <15..14> 11 DMA mode = Linked List Buffer mode
+ * <13> 1 RSBinA/L = store Rx status Block in List entry
+ * <12> 0 1 = Clear count of List Entry after fetching
+ * <11..10> 00 Address mode = Increment
+ * <9> 1 Terminate Buffer on RxBound
+ * <8> 0 Bus Width = 16bits
+ * <7..0> ? status Bits (write as 0s)
+ *
+ * 1110 0010 0000 0000 = 0xe200
+ */
+
+ usc_OutDmaReg( info, RDMR, 0xe200 );
+
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+
+ /* SETUP TRANSMIT AND RECEIVE DMA BUFFERS */
+
+ FrameSize = TESTFRAMESIZE;
+
+ /* setup 1st transmit buffer entry: */
+ /* with frame size and transmit control word */
+
+ info->tx_buffer_list[0].count = FrameSize;
+ info->tx_buffer_list[0].rcc = FrameSize;
+ info->tx_buffer_list[0].status = 0x4000;
+
+ /* build a transmit frame in 1st transmit DMA buffer */
+
+ TmpPtr = info->tx_buffer_list[0].virt_addr;
+ for (i = 0; i < FrameSize; i++ )
+ *TmpPtr++ = i;
+
+ /* setup 1st receive buffer entry: */
+ /* clear status, set max receive buffer size */
+
+ info->rx_buffer_list[0].status = 0;
+ info->rx_buffer_list[0].count = FrameSize + 4;
+
+ /* zero out the 1st receive buffer */
+
+ memset( info->rx_buffer_list[0].virt_addr, 0, FrameSize + 4 );
+
+ /* Set count field of next buffer entries to prevent */
+ /* 16C32 from using buffers after the 1st one. */
+
+ info->tx_buffer_list[1].count = 0;
+ info->rx_buffer_list[1].count = 0;
+
+
+ /***************************/
+ /* Program 16C32 receiver. */
+ /***************************/
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+
+ /* setup DMA transfers */
+ usc_RTCmd( info, RTCmd_PurgeRxFifo );
+
+ /* program 16C32 receiver with physical address of 1st DMA buffer entry */
+ phys_addr = info->rx_buffer_list[0].phys_entry;
+ usc_OutDmaReg( info, NRARL, (unsigned short)phys_addr );
+ usc_OutDmaReg( info, NRARU, (unsigned short)(phys_addr >> 16) );
+
+ /* Clear the Rx DMA status bits (read RDMR) and start channel */
+ usc_InDmaReg( info, RDMR );
+ usc_DmaCmd( info, DmaCmd_InitRxChannel );
+
+ /* Enable Receiver (RMR <1..0> = 10) */
+ usc_OutReg( info, RMR, (unsigned short)((usc_InReg(info, RMR) & 0xfffc) | 0x0002) );
+
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+
+ /*************************************************************/
+ /* WAIT FOR RECEIVER TO DMA ALL PARAMETERS FROM BUFFER ENTRY */
+ /*************************************************************/
+
+ /* Wait 100ms for interrupt. */
+ EndTime = jiffies + msecs_to_jiffies(100);
+
+ for(;;) {
+ if (time_after(jiffies, EndTime)) {
+ rc = false;
+ break;
+ }
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ status = usc_InDmaReg( info, RDMR );
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ if ( !(status & BIT4) && (status & BIT5) ) {
+ /* INITG (BIT 4) is inactive (no entry read in progress) AND */
+ /* BUSY (BIT 5) is active (channel still active). */
+ /* This means the buffer entry read has completed. */
+ break;
+ }
+ }
+
+
+ /******************************/
+ /* Program 16C32 transmitter. */
+ /******************************/
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+
+ /* Program the Transmit Character Length Register (TCLR) */
+ /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */
+
+ usc_OutReg( info, TCLR, (unsigned short)info->tx_buffer_list[0].count );
+ usc_RTCmd( info, RTCmd_PurgeTxFifo );
+
+ /* Program the address of the 1st DMA Buffer Entry in linked list */
+
+ phys_addr = info->tx_buffer_list[0].phys_entry;
+ usc_OutDmaReg( info, NTARL, (unsigned short)phys_addr );
+ usc_OutDmaReg( info, NTARU, (unsigned short)(phys_addr >> 16) );
+
+ /* unlatch Tx status bits, and start transmit channel. */
+
+ usc_OutReg( info, TCSR, (unsigned short)(( usc_InReg(info, TCSR) & 0x0f00) | 0xfa) );
+ usc_DmaCmd( info, DmaCmd_InitTxChannel );
+
+ /* wait for DMA controller to fill transmit FIFO */
+
+ usc_TCmd( info, TCmd_SelectTicrTxFifostatus );
+
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+
+ /**********************************/
+ /* WAIT FOR TRANSMIT FIFO TO FILL */
+ /**********************************/
+
+ /* Wait 100ms */
+ EndTime = jiffies + msecs_to_jiffies(100);
+
+ for(;;) {
+ if (time_after(jiffies, EndTime)) {
+ rc = false;
+ break;
+ }
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ FifoLevel = usc_InReg(info, TICR) >> 8;
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ if ( FifoLevel < 16 )
+ break;
+ else
+ if ( FrameSize < 32 ) {
+ /* This frame is smaller than the entire transmit FIFO */
+ /* so wait for the entire frame to be loaded. */
+ if ( FifoLevel <= (32 - FrameSize) )
+ break;
+ }
+ }
+
+
+ if ( rc )
+ {
+ /* Enable 16C32 transmitter. */
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+
+ /* Transmit mode Register (TMR), <1..0> = 10, Enable Transmitter */
+ usc_TCmd( info, TCmd_SendFrame );
+ usc_OutReg( info, TMR, (unsigned short)((usc_InReg(info, TMR) & 0xfffc) | 0x0002) );
+
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+
+ /******************************/
+ /* WAIT FOR TRANSMIT COMPLETE */
+ /******************************/
+
+ /* Wait 100ms */
+ EndTime = jiffies + msecs_to_jiffies(100);
+
+ /* While timer not expired wait for transmit complete */
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ status = usc_InReg( info, TCSR );
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ while ( !(status & (BIT6+BIT5+BIT4+BIT2+BIT1)) ) {
+ if (time_after(jiffies, EndTime)) {
+ rc = false;
+ break;
+ }
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ status = usc_InReg( info, TCSR );
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+ }
+ }
+
+
+ if ( rc ){
+ /* CHECK FOR TRANSMIT ERRORS */
+ if ( status & (BIT5 + BIT1) )
+ rc = false;
+ }
+
+ if ( rc ) {
+ /* WAIT FOR RECEIVE COMPLETE */
+
+ /* Wait 100ms */
+ EndTime = jiffies + msecs_to_jiffies(100);
+
+ /* Wait for 16C32 to write receive status to buffer entry. */
+ status=info->rx_buffer_list[0].status;
+ while ( status == 0 ) {
+ if (time_after(jiffies, EndTime)) {
+ rc = false;
+ break;
+ }
+ status=info->rx_buffer_list[0].status;
+ }
+ }
+
+
+ if ( rc ) {
+ /* CHECK FOR RECEIVE ERRORS */
+ status = info->rx_buffer_list[0].status;
+
+ if ( status & (BIT8 + BIT3 + BIT1) ) {
+ /* receive error has occurred */
+ rc = false;
+ } else {
+ if ( memcmp( info->tx_buffer_list[0].virt_addr ,
+ info->rx_buffer_list[0].virt_addr, FrameSize ) ){
+ rc = false;
+ }
+ }
+ }
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_reset( info );
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ /* restore current port options */
+ memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
+
+ return rc;
+
+} /* end of mgsl_dma_test() */
+
+/* mgsl_adapter_test()
+ *
+ * Perform the register, IRQ, and DMA tests for the 16C32.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: 0 if success, otherwise -ENODEV
+ */
+static int mgsl_adapter_test( struct mgsl_struct *info )
+{
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):Testing device %s\n",
+ __FILE__,__LINE__,info->device_name );
+
+ if ( !mgsl_register_test( info ) ) {
+ info->init_error = DiagStatus_AddressFailure;
+ printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
+ __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) );
+ return -ENODEV;
+ }
+
+ if ( !mgsl_irq_test( info ) ) {
+ info->init_error = DiagStatus_IrqFailure;
+ printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
+ __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
+ return -ENODEV;
+ }
+
+ if ( !mgsl_dma_test( info ) ) {
+ info->init_error = DiagStatus_DmaFailure;
+ printk( "%s(%d):DMA test failure for device %s DMA=%d\n",
+ __FILE__,__LINE__,info->device_name, (unsigned short)(info->dma_level) );
+ return -ENODEV;
+ }
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):device %s passed diagnostics\n",
+ __FILE__,__LINE__,info->device_name );
+
+ return 0;
+
+} /* end of mgsl_adapter_test() */
+
+/* mgsl_memory_test()
+ *
+ * Test the shared memory on a PCI adapter.
+ *
+ * Arguments: info pointer to device instance data
+ * Return Value: true if test passed, otherwise false
+ */
+static bool mgsl_memory_test( struct mgsl_struct *info )
+{
+ static unsigned long BitPatterns[] =
+ { 0x0, 0x55555555, 0xaaaaaaaa, 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
+ unsigned long Patterncount = ARRAY_SIZE(BitPatterns);
+ unsigned long i;
+ unsigned long TestLimit = SHARED_MEM_ADDRESS_SIZE/sizeof(unsigned long);
+ unsigned long * TestAddr;
+
+ if ( info->bus_type != MGSL_BUS_TYPE_PCI )
+ return true;
+
+ TestAddr = (unsigned long *)info->memory_base;
+
+ /* Test data lines with test pattern at one location. */
+
+ for ( i = 0 ; i < Patterncount ; i++ ) {
+ *TestAddr = BitPatterns[i];
+ if ( *TestAddr != BitPatterns[i] )
+ return false;
+ }
+
+ /* Test address lines with incrementing pattern over */
+ /* entire address range. */
+
+ for ( i = 0 ; i < TestLimit ; i++ ) {
+ *TestAddr = i * 4;
+ TestAddr++;
+ }
+
+ TestAddr = (unsigned long *)info->memory_base;
+
+ for ( i = 0 ; i < TestLimit ; i++ ) {
+ if ( *TestAddr != i * 4 )
+ return false;
+ TestAddr++;
+ }
+
+ memset( info->memory_base, 0, SHARED_MEM_ADDRESS_SIZE );
+
+ return true;
+
+} /* End Of mgsl_memory_test() */
+
+
+/* mgsl_load_pci_memory()
+ *
+ * Load a large block of data into the PCI shared memory.
+ * Use this instead of memcpy() or memmove() to move data
+ * into the PCI shared memory.
+ *
+ * Notes:
+ *
+ * This function prevents the PCI9050 interface chip from hogging
+ * the adapter local bus, which can starve the 16C32 by preventing
+ * 16C32 bus master cycles.
+ *
+ * The PCI9050 documentation says that the 9050 will always release
+ * control of the local bus after completing the current read
+ * or write operation.
+ *
+ * It appears that as long as the PCI9050 write FIFO is full, the
+ * PCI9050 treats all of the writes as a single burst transaction
+ * and will not release the bus. This causes DMA latency problems
+ * at high speeds when copying large data blocks to the shared
+ * memory.
+ *
+ * This function in effect, breaks the a large shared memory write
+ * into multiple transations by interleaving a shared memory read
+ * which will flush the write FIFO and 'complete' the write
+ * transation. This allows any pending DMA request to gain control
+ * of the local bus in a timely fasion.
+ *
+ * Arguments:
+ *
+ * TargetPtr pointer to target address in PCI shared memory
+ * SourcePtr pointer to source buffer for data
+ * count count in bytes of data to copy
+ *
+ * Return Value: None
+ */
+static void mgsl_load_pci_memory( char* TargetPtr, const char* SourcePtr,
+ unsigned short count )
+{
+ /* 16 32-bit writes @ 60ns each = 960ns max latency on local bus */
+#define PCI_LOAD_INTERVAL 64
+
+ unsigned short Intervalcount = count / PCI_LOAD_INTERVAL;
+ unsigned short Index;
+ unsigned long Dummy;
+
+ for ( Index = 0 ; Index < Intervalcount ; Index++ )
+ {
+ memcpy(TargetPtr, SourcePtr, PCI_LOAD_INTERVAL);
+ Dummy = *((volatile unsigned long *)TargetPtr);
+ TargetPtr += PCI_LOAD_INTERVAL;
+ SourcePtr += PCI_LOAD_INTERVAL;
+ }
+
+ memcpy( TargetPtr, SourcePtr, count % PCI_LOAD_INTERVAL );
+
+} /* End Of mgsl_load_pci_memory() */
+
+static void mgsl_trace_block(struct mgsl_struct *info,const char* data, int count, int xmit)
+{
+ int i;
+ int linecount;
+ if (xmit)
+ printk("%s tx data:\n",info->device_name);
+ else
+ printk("%s rx data:\n",info->device_name);
+
+ while(count) {
+ if (count > 16)
+ linecount = 16;
+ else
+ linecount = count;
+
+ for(i=0;i<linecount;i++)
+ printk("%02X ",(unsigned char)data[i]);
+ for(;i<17;i++)
+ printk(" ");
+ for(i=0;i<linecount;i++) {
+ if (data[i]>=040 && data[i]<=0176)
+ printk("%c",data[i]);
+ else
+ printk(".");
+ }
+ printk("\n");
+
+ data += linecount;
+ count -= linecount;
+ }
+} /* end of mgsl_trace_block() */
+
+/* mgsl_tx_timeout()
+ *
+ * called when HDLC frame times out
+ * update stats and do tx completion processing
+ *
+ * Arguments: context pointer to device instance data
+ * Return Value: None
+ */
+static void mgsl_tx_timeout(unsigned long context)
+{
+ struct mgsl_struct *info = (struct mgsl_struct*)context;
+ unsigned long flags;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):mgsl_tx_timeout(%s)\n",
+ __FILE__,__LINE__,info->device_name);
+ if(info->tx_active &&
+ (info->params.mode == MGSL_MODE_HDLC ||
+ info->params.mode == MGSL_MODE_RAW) ) {
+ info->icount.txtimeout++;
+ }
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ info->tx_active = false;
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+ if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
+ usc_loopmode_cancel_transmit( info );
+
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount)
+ hdlcdev_tx_done(info);
+ else
+#endif
+ mgsl_bh_transmit(info);
+
+} /* end of mgsl_tx_timeout() */
+
+/* signal that there are no more frames to send, so that
+ * line is 'released' by echoing RxD to TxD when current
+ * transmission is complete (or immediately if no tx in progress).
+ */
+static int mgsl_loopmode_send_done( struct mgsl_struct * info )
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) {
+ if (info->tx_active)
+ info->loopmode_send_done_requested = true;
+ else
+ usc_loopmode_send_done(info);
+ }
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ return 0;
+}
+
+/* release the line by echoing RxD to TxD
+ * upon completion of a transmit frame
+ */
+static void usc_loopmode_send_done( struct mgsl_struct * info )
+{
+ info->loopmode_send_done_requested = false;
+ /* clear CMR:13 to 0 to start echoing RxData to TxData */
+ info->cmr_value &= ~BIT13;
+ usc_OutReg(info, CMR, info->cmr_value);
+}
+
+/* abort a transmit in progress while in HDLC LoopMode
+ */
+static void usc_loopmode_cancel_transmit( struct mgsl_struct * info )
+{
+ /* reset tx dma channel and purge TxFifo */
+ usc_RTCmd( info, RTCmd_PurgeTxFifo );
+ usc_DmaCmd( info, DmaCmd_ResetTxChannel );
+ usc_loopmode_send_done( info );
+}
+
+/* for HDLC/SDLC LoopMode, setting CMR:13 after the transmitter is enabled
+ * is an Insert Into Loop action. Upon receipt of a GoAhead sequence (RxAbort)
+ * we must clear CMR:13 to begin repeating TxData to RxData
+ */
+static void usc_loopmode_insert_request( struct mgsl_struct * info )
+{
+ info->loopmode_insert_requested = true;
+
+ /* enable RxAbort irq. On next RxAbort, clear CMR:13 to
+ * begin repeating TxData on RxData (complete insertion)
+ */
+ usc_OutReg( info, RICR,
+ (usc_InReg( info, RICR ) | RXSTATUS_ABORT_RECEIVED ) );
+
+ /* set CMR:13 to insert into loop on next GoAhead (RxAbort) */
+ info->cmr_value |= BIT13;
+ usc_OutReg(info, CMR, info->cmr_value);
+}
+
+/* return 1 if station is inserted into the loop, otherwise 0
+ */
+static int usc_loopmode_active( struct mgsl_struct * info)
+{
+ return usc_InReg( info, CCSR ) & BIT7 ? 1 : 0 ;
+}
+
+#if SYNCLINK_GENERIC_HDLC
+
+/**
+ * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
+ * set encoding and frame check sequence (FCS) options
+ *
+ * dev pointer to network device structure
+ * encoding serial encoding setting
+ * parity FCS setting
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ struct mgsl_struct *info = dev_to_port(dev);
+ unsigned char new_encoding;
+ unsigned short new_crctype;
+
+ /* return error if TTY interface open */
+ if (info->port.count)
+ return -EBUSY;
+
+ switch (encoding)
+ {
+ case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
+ case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
+ case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
+ case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
+ case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
+ default: return -EINVAL;
+ }
+
+ switch (parity)
+ {
+ case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
+ case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
+ case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
+ default: return -EINVAL;
+ }
+
+ info->params.encoding = new_encoding;
+ info->params.crc_type = new_crctype;
+
+ /* if network interface up, reprogram hardware */
+ if (info->netcount)
+ mgsl_program_hw(info);
+
+ return 0;
+}
+
+/**
+ * called by generic HDLC layer to send frame
+ *
+ * skb socket buffer containing HDLC frame
+ * dev pointer to network device structure
+ */
+static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct mgsl_struct *info = dev_to_port(dev);
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
+
+ /* stop sending until this frame completes */
+ netif_stop_queue(dev);
+
+ /* copy data to device buffers */
+ info->xmit_cnt = skb->len;
+ mgsl_load_tx_dma_buffer(info, skb->data, skb->len);
+
+ /* update network statistics */
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+
+ /* done with socket buffer, so free it */
+ dev_kfree_skb(skb);
+
+ /* save start time for transmit timeout detection */
+ dev->trans_start = jiffies;
+
+ /* start hardware transmitter if necessary */
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ if (!info->tx_active)
+ usc_start_transmitter(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ return NETDEV_TX_OK;
+}
+
+/**
+ * called by network layer when interface enabled
+ * claim resources and initialize hardware
+ *
+ * dev pointer to network device structure
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_open(struct net_device *dev)
+{
+ struct mgsl_struct *info = dev_to_port(dev);
+ int rc;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
+
+ /* generic HDLC layer open processing */
+ if ((rc = hdlc_open(dev)))
+ return rc;
+
+ /* arbitrate between network and tty opens */
+ spin_lock_irqsave(&info->netlock, flags);
+ if (info->port.count != 0 || info->netcount != 0) {
+ printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
+ spin_unlock_irqrestore(&info->netlock, flags);
+ return -EBUSY;
+ }
+ info->netcount=1;
+ spin_unlock_irqrestore(&info->netlock, flags);
+
+ /* claim resources and init adapter */
+ if ((rc = startup(info)) != 0) {
+ spin_lock_irqsave(&info->netlock, flags);
+ info->netcount=0;
+ spin_unlock_irqrestore(&info->netlock, flags);
+ return rc;
+ }
+
+ /* assert DTR and RTS, apply hardware settings */
+ info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+ mgsl_program_hw(info);
+
+ /* enable network layer transmit */
+ dev->trans_start = jiffies;
+ netif_start_queue(dev);
+
+ /* inform generic HDLC layer of current DCD status */
+ spin_lock_irqsave(&info->irq_spinlock, flags);
+ usc_get_serial_signals(info);
+ spin_unlock_irqrestore(&info->irq_spinlock, flags);
+ if (info->serial_signals & SerialSignal_DCD)
+ netif_carrier_on(dev);
+ else
+ netif_carrier_off(dev);
+ return 0;
+}
+
+/**
+ * called by network layer when interface is disabled
+ * shutdown hardware and release resources
+ *
+ * dev pointer to network device structure
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_close(struct net_device *dev)
+{
+ struct mgsl_struct *info = dev_to_port(dev);
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
+
+ netif_stop_queue(dev);
+
+ /* shutdown adapter and release resources */
+ shutdown(info);
+
+ hdlc_close(dev);
+
+ spin_lock_irqsave(&info->netlock, flags);
+ info->netcount=0;
+ spin_unlock_irqrestore(&info->netlock, flags);
+
+ return 0;
+}
+
+/**
+ * called by network layer to process IOCTL call to network device
+ *
+ * dev pointer to network device structure
+ * ifr pointer to network interface request structure
+ * cmd IOCTL command code
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ const size_t size = sizeof(sync_serial_settings);
+ sync_serial_settings new_line;
+ sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
+ struct mgsl_struct *info = dev_to_port(dev);
+ unsigned int flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
+
+ /* return error if TTY interface open */
+ if (info->port.count)
+ return -EBUSY;
+
+ if (cmd != SIOCWANDEV)
+ return hdlc_ioctl(dev, ifr, cmd);
+
+ switch(ifr->ifr_settings.type) {
+ case IF_GET_IFACE: /* return current sync_serial_settings */
+
+ ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
+ if (ifr->ifr_settings.size < size) {
+ ifr->ifr_settings.size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+
+ flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
+ HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
+ HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
+ HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
+
+ switch (flags){
+ case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
+ case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
+ case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
+ case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
+ default: new_line.clock_type = CLOCK_DEFAULT;
+ }
+
+ new_line.clock_rate = info->params.clock_speed;
+ new_line.loopback = info->params.loopback ? 1:0;
+
+ if (copy_to_user(line, &new_line, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
+
+ if(!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (copy_from_user(&new_line, line, size))
+ return -EFAULT;
+
+ switch (new_line.clock_type)
+ {
+ case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
+ case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
+ case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
+ case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
+ case CLOCK_DEFAULT: flags = info->params.flags &
+ (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
+ HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
+ HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
+ HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
+ default: return -EINVAL;
+ }
+
+ if (new_line.loopback != 0 && new_line.loopback != 1)
+ return -EINVAL;
+
+ info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
+ HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
+ HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
+ HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
+ info->params.flags |= flags;
+
+ info->params.loopback = new_line.loopback;
+
+ if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
+ info->params.clock_speed = new_line.clock_rate;
+ else
+ info->params.clock_speed = 0;
+
+ /* if network interface up, reprogram hardware */
+ if (info->netcount)
+ mgsl_program_hw(info);
+ return 0;
+
+ default:
+ return hdlc_ioctl(dev, ifr, cmd);
+ }
+}
+
+/**
+ * called by network layer when transmit timeout is detected
+ *
+ * dev pointer to network device structure
+ */
+static void hdlcdev_tx_timeout(struct net_device *dev)
+{
+ struct mgsl_struct *info = dev_to_port(dev);
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("hdlcdev_tx_timeout(%s)\n",dev->name);
+
+ dev->stats.tx_errors++;
+ dev->stats.tx_aborted_errors++;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ usc_stop_transmitter(info);
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ netif_wake_queue(dev);
+}
+
+/**
+ * called by device driver when transmit completes
+ * reenable network layer transmit if stopped
+ *
+ * info pointer to device instance information
+ */
+static void hdlcdev_tx_done(struct mgsl_struct *info)
+{
+ if (netif_queue_stopped(info->netdev))
+ netif_wake_queue(info->netdev);
+}
+
+/**
+ * called by device driver when frame received
+ * pass frame to network layer
+ *
+ * info pointer to device instance information
+ * buf pointer to buffer contianing frame data
+ * size count of data bytes in buf
+ */
+static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size)
+{
+ struct sk_buff *skb = dev_alloc_skb(size);
+ struct net_device *dev = info->netdev;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("hdlcdev_rx(%s)\n", dev->name);
+
+ if (skb == NULL) {
+ printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n",
+ dev->name);
+ dev->stats.rx_dropped++;
+ return;
+ }
+
+ memcpy(skb_put(skb, size), buf, size);
+
+ skb->protocol = hdlc_type_trans(skb, dev);
+
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += size;
+
+ netif_rx(skb);
+}
+
+static const struct net_device_ops hdlcdev_ops = {
+ .ndo_open = hdlcdev_open,
+ .ndo_stop = hdlcdev_close,
+ .ndo_change_mtu = hdlc_change_mtu,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_do_ioctl = hdlcdev_ioctl,
+ .ndo_tx_timeout = hdlcdev_tx_timeout,
+};
+
+/**
+ * called by device driver when adding device instance
+ * do generic HDLC initialization
+ *
+ * info pointer to device instance information
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_init(struct mgsl_struct *info)
+{
+ int rc;
+ struct net_device *dev;
+ hdlc_device *hdlc;
+
+ /* allocate and initialize network and HDLC layer objects */
+
+ if (!(dev = alloc_hdlcdev(info))) {
+ printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
+ return -ENOMEM;
+ }
+
+ /* for network layer reporting purposes only */
+ dev->base_addr = info->io_base;
+ dev->irq = info->irq_level;
+ dev->dma = info->dma_level;
+
+ /* network layer callbacks and settings */
+ dev->netdev_ops = &hdlcdev_ops;
+ dev->watchdog_timeo = 10 * HZ;
+ dev->tx_queue_len = 50;
+
+ /* generic HDLC layer callbacks and settings */
+ hdlc = dev_to_hdlc(dev);
+ hdlc->attach = hdlcdev_attach;
+ hdlc->xmit = hdlcdev_xmit;
+
+ /* register objects with HDLC layer */
+ if ((rc = register_hdlc_device(dev))) {
+ printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
+ free_netdev(dev);
+ return rc;
+ }
+
+ info->netdev = dev;
+ return 0;
+}
+
+/**
+ * called by device driver when removing device instance
+ * do generic HDLC cleanup
+ *
+ * info pointer to device instance information
+ */
+static void hdlcdev_exit(struct mgsl_struct *info)
+{
+ unregister_hdlc_device(info->netdev);
+ free_netdev(info->netdev);
+ info->netdev = NULL;
+}
+
+#endif /* CONFIG_HDLC */
+
+
+static int __devinit synclink_init_one (struct pci_dev *dev,
+ const struct pci_device_id *ent)
+{
+ struct mgsl_struct *info;
+
+ if (pci_enable_device(dev)) {
+ printk("error enabling pci device %p\n", dev);
+ return -EIO;
+ }
+
+ if (!(info = mgsl_allocate_device())) {
+ printk("can't allocate device instance data.\n");
+ return -EIO;
+ }
+
+ /* Copy user configuration info to device instance data */
+
+ info->io_base = pci_resource_start(dev, 2);
+ info->irq_level = dev->irq;
+ info->phys_memory_base = pci_resource_start(dev, 3);
+
+ /* Because veremap only works on page boundaries we must map
+ * a larger area than is actually implemented for the LCR
+ * memory range. We map a full page starting at the page boundary.
+ */
+ info->phys_lcr_base = pci_resource_start(dev, 0);
+ info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1);
+ info->phys_lcr_base &= ~(PAGE_SIZE-1);
+
+ info->bus_type = MGSL_BUS_TYPE_PCI;
+ info->io_addr_size = 8;
+ info->irq_flags = IRQF_SHARED;
+
+ if (dev->device == 0x0210) {
+ /* Version 1 PCI9030 based universal PCI adapter */
+ info->misc_ctrl_value = 0x007c4080;
+ info->hw_version = 1;
+ } else {
+ /* Version 0 PCI9050 based 5V PCI adapter
+ * A PCI9050 bug prevents reading LCR registers if
+ * LCR base address bit 7 is set. Maintain shadow
+ * value so we can write to LCR misc control reg.
+ */
+ info->misc_ctrl_value = 0x087e4546;
+ info->hw_version = 0;
+ }
+
+ mgsl_add_device(info);
+
+ return 0;
+}
+
+static void __devexit synclink_remove_one (struct pci_dev *dev)
+{
+}
+
--- /dev/null
+/*
+ * Device driver for Microgate SyncLink GT serial adapters.
+ *
+ * written by Paul Fulghum for Microgate Corporation
+ * paulkf@microgate.com
+ *
+ * Microgate and SyncLink are trademarks of Microgate Corporation
+ *
+ * This code is released under the GNU General Public License (GPL)
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * DEBUG OUTPUT DEFINITIONS
+ *
+ * uncomment lines below to enable specific types of debug output
+ *
+ * DBGINFO information - most verbose output
+ * DBGERR serious errors
+ * DBGBH bottom half service routine debugging
+ * DBGISR interrupt service routine debugging
+ * DBGDATA output receive and transmit data
+ * DBGTBUF output transmit DMA buffers and registers
+ * DBGRBUF output receive DMA buffers and registers
+ */
+
+#define DBGINFO(fmt) if (debug_level >= DEBUG_LEVEL_INFO) printk fmt
+#define DBGERR(fmt) if (debug_level >= DEBUG_LEVEL_ERROR) printk fmt
+#define DBGBH(fmt) if (debug_level >= DEBUG_LEVEL_BH) printk fmt
+#define DBGISR(fmt) if (debug_level >= DEBUG_LEVEL_ISR) printk fmt
+#define DBGDATA(info, buf, size, label) if (debug_level >= DEBUG_LEVEL_DATA) trace_block((info), (buf), (size), (label))
+/*#define DBGTBUF(info) dump_tbufs(info)*/
+/*#define DBGRBUF(info) dump_rbufs(info)*/
+
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/ioctl.h>
+#include <linux/termios.h>
+#include <linux/bitops.h>
+#include <linux/workqueue.h>
+#include <linux/hdlc.h>
+#include <linux/synclink.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/dma.h>
+#include <asm/types.h>
+#include <asm/uaccess.h>
+
+#if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_GT_MODULE))
+#define SYNCLINK_GENERIC_HDLC 1
+#else
+#define SYNCLINK_GENERIC_HDLC 0
+#endif
+
+/*
+ * module identification
+ */
+static char *driver_name = "SyncLink GT";
+static char *tty_driver_name = "synclink_gt";
+static char *tty_dev_prefix = "ttySLG";
+MODULE_LICENSE("GPL");
+#define MGSL_MAGIC 0x5401
+#define MAX_DEVICES 32
+
+static struct pci_device_id pci_table[] = {
+ {PCI_VENDOR_ID_MICROGATE, SYNCLINK_GT_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
+ {PCI_VENDOR_ID_MICROGATE, SYNCLINK_GT2_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
+ {PCI_VENDOR_ID_MICROGATE, SYNCLINK_GT4_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
+ {PCI_VENDOR_ID_MICROGATE, SYNCLINK_AC_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
+ {0,}, /* terminate list */
+};
+MODULE_DEVICE_TABLE(pci, pci_table);
+
+static int init_one(struct pci_dev *dev,const struct pci_device_id *ent);
+static void remove_one(struct pci_dev *dev);
+static struct pci_driver pci_driver = {
+ .name = "synclink_gt",
+ .id_table = pci_table,
+ .probe = init_one,
+ .remove = __devexit_p(remove_one),
+};
+
+static bool pci_registered;
+
+/*
+ * module configuration and status
+ */
+static struct slgt_info *slgt_device_list;
+static int slgt_device_count;
+
+static int ttymajor;
+static int debug_level;
+static int maxframe[MAX_DEVICES];
+
+module_param(ttymajor, int, 0);
+module_param(debug_level, int, 0);
+module_param_array(maxframe, int, NULL, 0);
+
+MODULE_PARM_DESC(ttymajor, "TTY major device number override: 0=auto assigned");
+MODULE_PARM_DESC(debug_level, "Debug syslog output: 0=disabled, 1 to 5=increasing detail");
+MODULE_PARM_DESC(maxframe, "Maximum frame size used by device (4096 to 65535)");
+
+/*
+ * tty support and callbacks
+ */
+static struct tty_driver *serial_driver;
+
+static int open(struct tty_struct *tty, struct file * filp);
+static void close(struct tty_struct *tty, struct file * filp);
+static void hangup(struct tty_struct *tty);
+static void set_termios(struct tty_struct *tty, struct ktermios *old_termios);
+
+static int write(struct tty_struct *tty, const unsigned char *buf, int count);
+static int put_char(struct tty_struct *tty, unsigned char ch);
+static void send_xchar(struct tty_struct *tty, char ch);
+static void wait_until_sent(struct tty_struct *tty, int timeout);
+static int write_room(struct tty_struct *tty);
+static void flush_chars(struct tty_struct *tty);
+static void flush_buffer(struct tty_struct *tty);
+static void tx_hold(struct tty_struct *tty);
+static void tx_release(struct tty_struct *tty);
+
+static int ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg);
+static int chars_in_buffer(struct tty_struct *tty);
+static void throttle(struct tty_struct * tty);
+static void unthrottle(struct tty_struct * tty);
+static int set_break(struct tty_struct *tty, int break_state);
+
+/*
+ * generic HDLC support and callbacks
+ */
+#if SYNCLINK_GENERIC_HDLC
+#define dev_to_port(D) (dev_to_hdlc(D)->priv)
+static void hdlcdev_tx_done(struct slgt_info *info);
+static void hdlcdev_rx(struct slgt_info *info, char *buf, int size);
+static int hdlcdev_init(struct slgt_info *info);
+static void hdlcdev_exit(struct slgt_info *info);
+#endif
+
+
+/*
+ * device specific structures, macros and functions
+ */
+
+#define SLGT_MAX_PORTS 4
+#define SLGT_REG_SIZE 256
+
+/*
+ * conditional wait facility
+ */
+struct cond_wait {
+ struct cond_wait *next;
+ wait_queue_head_t q;
+ wait_queue_t wait;
+ unsigned int data;
+};
+static void init_cond_wait(struct cond_wait *w, unsigned int data);
+static void add_cond_wait(struct cond_wait **head, struct cond_wait *w);
+static void remove_cond_wait(struct cond_wait **head, struct cond_wait *w);
+static void flush_cond_wait(struct cond_wait **head);
+
+/*
+ * DMA buffer descriptor and access macros
+ */
+struct slgt_desc
+{
+ __le16 count;
+ __le16 status;
+ __le32 pbuf; /* physical address of data buffer */
+ __le32 next; /* physical address of next descriptor */
+
+ /* driver book keeping */
+ char *buf; /* virtual address of data buffer */
+ unsigned int pdesc; /* physical address of this descriptor */
+ dma_addr_t buf_dma_addr;
+ unsigned short buf_count;
+};
+
+#define set_desc_buffer(a,b) (a).pbuf = cpu_to_le32((unsigned int)(b))
+#define set_desc_next(a,b) (a).next = cpu_to_le32((unsigned int)(b))
+#define set_desc_count(a,b)(a).count = cpu_to_le16((unsigned short)(b))
+#define set_desc_eof(a,b) (a).status = cpu_to_le16((b) ? (le16_to_cpu((a).status) | BIT0) : (le16_to_cpu((a).status) & ~BIT0))
+#define set_desc_status(a, b) (a).status = cpu_to_le16((unsigned short)(b))
+#define desc_count(a) (le16_to_cpu((a).count))
+#define desc_status(a) (le16_to_cpu((a).status))
+#define desc_complete(a) (le16_to_cpu((a).status) & BIT15)
+#define desc_eof(a) (le16_to_cpu((a).status) & BIT2)
+#define desc_crc_error(a) (le16_to_cpu((a).status) & BIT1)
+#define desc_abort(a) (le16_to_cpu((a).status) & BIT0)
+#define desc_residue(a) ((le16_to_cpu((a).status) & 0x38) >> 3)
+
+struct _input_signal_events {
+ int ri_up;
+ int ri_down;
+ int dsr_up;
+ int dsr_down;
+ int dcd_up;
+ int dcd_down;
+ int cts_up;
+ int cts_down;
+};
+
+/*
+ * device instance data structure
+ */
+struct slgt_info {
+ void *if_ptr; /* General purpose pointer (used by SPPP) */
+ struct tty_port port;
+
+ struct slgt_info *next_device; /* device list link */
+
+ int magic;
+
+ char device_name[25];
+ struct pci_dev *pdev;
+
+ int port_count; /* count of ports on adapter */
+ int adapter_num; /* adapter instance number */
+ int port_num; /* port instance number */
+
+ /* array of pointers to port contexts on this adapter */
+ struct slgt_info *port_array[SLGT_MAX_PORTS];
+
+ int line; /* tty line instance number */
+
+ struct mgsl_icount icount;
+
+ int timeout;
+ int x_char; /* xon/xoff character */
+ unsigned int read_status_mask;
+ unsigned int ignore_status_mask;
+
+ wait_queue_head_t status_event_wait_q;
+ wait_queue_head_t event_wait_q;
+ struct timer_list tx_timer;
+ struct timer_list rx_timer;
+
+ unsigned int gpio_present;
+ struct cond_wait *gpio_wait_q;
+
+ spinlock_t lock; /* spinlock for synchronizing with ISR */
+
+ struct work_struct task;
+ u32 pending_bh;
+ bool bh_requested;
+ bool bh_running;
+
+ int isr_overflow;
+ bool irq_requested; /* true if IRQ requested */
+ bool irq_occurred; /* for diagnostics use */
+
+ /* device configuration */
+
+ unsigned int bus_type;
+ unsigned int irq_level;
+ unsigned long irq_flags;
+
+ unsigned char __iomem * reg_addr; /* memory mapped registers address */
+ u32 phys_reg_addr;
+ bool reg_addr_requested;
+
+ MGSL_PARAMS params; /* communications parameters */
+ u32 idle_mode;
+ u32 max_frame_size; /* as set by device config */
+
+ unsigned int rbuf_fill_level;
+ unsigned int rx_pio;
+ unsigned int if_mode;
+ unsigned int base_clock;
+ unsigned int xsync;
+ unsigned int xctrl;
+
+ /* device status */
+
+ bool rx_enabled;
+ bool rx_restart;
+
+ bool tx_enabled;
+ bool tx_active;
+
+ unsigned char signals; /* serial signal states */
+ int init_error; /* initialization error */
+
+ unsigned char *tx_buf;
+ int tx_count;
+
+ char flag_buf[MAX_ASYNC_BUFFER_SIZE];
+ char char_buf[MAX_ASYNC_BUFFER_SIZE];
+ bool drop_rts_on_tx_done;
+ struct _input_signal_events input_signal_events;
+
+ int dcd_chkcount; /* check counts to prevent */
+ int cts_chkcount; /* too many IRQs if a signal */
+ int dsr_chkcount; /* is floating */
+ int ri_chkcount;
+
+ char *bufs; /* virtual address of DMA buffer lists */
+ dma_addr_t bufs_dma_addr; /* physical address of buffer descriptors */
+
+ unsigned int rbuf_count;
+ struct slgt_desc *rbufs;
+ unsigned int rbuf_current;
+ unsigned int rbuf_index;
+ unsigned int rbuf_fill_index;
+ unsigned short rbuf_fill_count;
+
+ unsigned int tbuf_count;
+ struct slgt_desc *tbufs;
+ unsigned int tbuf_current;
+ unsigned int tbuf_start;
+
+ unsigned char *tmp_rbuf;
+ unsigned int tmp_rbuf_count;
+
+ /* SPPP/Cisco HDLC device parts */
+
+ int netcount;
+ spinlock_t netlock;
+#if SYNCLINK_GENERIC_HDLC
+ struct net_device *netdev;
+#endif
+
+};
+
+static MGSL_PARAMS default_params = {
+ .mode = MGSL_MODE_HDLC,
+ .loopback = 0,
+ .flags = HDLC_FLAG_UNDERRUN_ABORT15,
+ .encoding = HDLC_ENCODING_NRZI_SPACE,
+ .clock_speed = 0,
+ .addr_filter = 0xff,
+ .crc_type = HDLC_CRC_16_CCITT,
+ .preamble_length = HDLC_PREAMBLE_LENGTH_8BITS,
+ .preamble = HDLC_PREAMBLE_PATTERN_NONE,
+ .data_rate = 9600,
+ .data_bits = 8,
+ .stop_bits = 1,
+ .parity = ASYNC_PARITY_NONE
+};
+
+
+#define BH_RECEIVE 1
+#define BH_TRANSMIT 2
+#define BH_STATUS 4
+#define IO_PIN_SHUTDOWN_LIMIT 100
+
+#define DMABUFSIZE 256
+#define DESC_LIST_SIZE 4096
+
+#define MASK_PARITY BIT1
+#define MASK_FRAMING BIT0
+#define MASK_BREAK BIT14
+#define MASK_OVERRUN BIT4
+
+#define GSR 0x00 /* global status */
+#define JCR 0x04 /* JTAG control */
+#define IODR 0x08 /* GPIO direction */
+#define IOER 0x0c /* GPIO interrupt enable */
+#define IOVR 0x10 /* GPIO value */
+#define IOSR 0x14 /* GPIO interrupt status */
+#define TDR 0x80 /* tx data */
+#define RDR 0x80 /* rx data */
+#define TCR 0x82 /* tx control */
+#define TIR 0x84 /* tx idle */
+#define TPR 0x85 /* tx preamble */
+#define RCR 0x86 /* rx control */
+#define VCR 0x88 /* V.24 control */
+#define CCR 0x89 /* clock control */
+#define BDR 0x8a /* baud divisor */
+#define SCR 0x8c /* serial control */
+#define SSR 0x8e /* serial status */
+#define RDCSR 0x90 /* rx DMA control/status */
+#define TDCSR 0x94 /* tx DMA control/status */
+#define RDDAR 0x98 /* rx DMA descriptor address */
+#define TDDAR 0x9c /* tx DMA descriptor address */
+#define XSR 0x40 /* extended sync pattern */
+#define XCR 0x44 /* extended control */
+
+#define RXIDLE BIT14
+#define RXBREAK BIT14
+#define IRQ_TXDATA BIT13
+#define IRQ_TXIDLE BIT12
+#define IRQ_TXUNDER BIT11 /* HDLC */
+#define IRQ_RXDATA BIT10
+#define IRQ_RXIDLE BIT9 /* HDLC */
+#define IRQ_RXBREAK BIT9 /* async */
+#define IRQ_RXOVER BIT8
+#define IRQ_DSR BIT7
+#define IRQ_CTS BIT6
+#define IRQ_DCD BIT5
+#define IRQ_RI BIT4
+#define IRQ_ALL 0x3ff0
+#define IRQ_MASTER BIT0
+
+#define slgt_irq_on(info, mask) \
+ wr_reg16((info), SCR, (unsigned short)(rd_reg16((info), SCR) | (mask)))
+#define slgt_irq_off(info, mask) \
+ wr_reg16((info), SCR, (unsigned short)(rd_reg16((info), SCR) & ~(mask)))
+
+static __u8 rd_reg8(struct slgt_info *info, unsigned int addr);
+static void wr_reg8(struct slgt_info *info, unsigned int addr, __u8 value);
+static __u16 rd_reg16(struct slgt_info *info, unsigned int addr);
+static void wr_reg16(struct slgt_info *info, unsigned int addr, __u16 value);
+static __u32 rd_reg32(struct slgt_info *info, unsigned int addr);
+static void wr_reg32(struct slgt_info *info, unsigned int addr, __u32 value);
+
+static void msc_set_vcr(struct slgt_info *info);
+
+static int startup(struct slgt_info *info);
+static int block_til_ready(struct tty_struct *tty, struct file * filp,struct slgt_info *info);
+static void shutdown(struct slgt_info *info);
+static void program_hw(struct slgt_info *info);
+static void change_params(struct slgt_info *info);
+
+static int register_test(struct slgt_info *info);
+static int irq_test(struct slgt_info *info);
+static int loopback_test(struct slgt_info *info);
+static int adapter_test(struct slgt_info *info);
+
+static void reset_adapter(struct slgt_info *info);
+static void reset_port(struct slgt_info *info);
+static void async_mode(struct slgt_info *info);
+static void sync_mode(struct slgt_info *info);
+
+static void rx_stop(struct slgt_info *info);
+static void rx_start(struct slgt_info *info);
+static void reset_rbufs(struct slgt_info *info);
+static void free_rbufs(struct slgt_info *info, unsigned int first, unsigned int last);
+static void rdma_reset(struct slgt_info *info);
+static bool rx_get_frame(struct slgt_info *info);
+static bool rx_get_buf(struct slgt_info *info);
+
+static void tx_start(struct slgt_info *info);
+static void tx_stop(struct slgt_info *info);
+static void tx_set_idle(struct slgt_info *info);
+static unsigned int free_tbuf_count(struct slgt_info *info);
+static unsigned int tbuf_bytes(struct slgt_info *info);
+static void reset_tbufs(struct slgt_info *info);
+static void tdma_reset(struct slgt_info *info);
+static bool tx_load(struct slgt_info *info, const char *buf, unsigned int count);
+
+static void get_signals(struct slgt_info *info);
+static void set_signals(struct slgt_info *info);
+static void enable_loopback(struct slgt_info *info);
+static void set_rate(struct slgt_info *info, u32 data_rate);
+
+static int bh_action(struct slgt_info *info);
+static void bh_handler(struct work_struct *work);
+static void bh_transmit(struct slgt_info *info);
+static void isr_serial(struct slgt_info *info);
+static void isr_rdma(struct slgt_info *info);
+static void isr_txeom(struct slgt_info *info, unsigned short status);
+static void isr_tdma(struct slgt_info *info);
+
+static int alloc_dma_bufs(struct slgt_info *info);
+static void free_dma_bufs(struct slgt_info *info);
+static int alloc_desc(struct slgt_info *info);
+static void free_desc(struct slgt_info *info);
+static int alloc_bufs(struct slgt_info *info, struct slgt_desc *bufs, int count);
+static void free_bufs(struct slgt_info *info, struct slgt_desc *bufs, int count);
+
+static int alloc_tmp_rbuf(struct slgt_info *info);
+static void free_tmp_rbuf(struct slgt_info *info);
+
+static void tx_timeout(unsigned long context);
+static void rx_timeout(unsigned long context);
+
+/*
+ * ioctl handlers
+ */
+static int get_stats(struct slgt_info *info, struct mgsl_icount __user *user_icount);
+static int get_params(struct slgt_info *info, MGSL_PARAMS __user *params);
+static int set_params(struct slgt_info *info, MGSL_PARAMS __user *params);
+static int get_txidle(struct slgt_info *info, int __user *idle_mode);
+static int set_txidle(struct slgt_info *info, int idle_mode);
+static int tx_enable(struct slgt_info *info, int enable);
+static int tx_abort(struct slgt_info *info);
+static int rx_enable(struct slgt_info *info, int enable);
+static int modem_input_wait(struct slgt_info *info,int arg);
+static int wait_mgsl_event(struct slgt_info *info, int __user *mask_ptr);
+static int tiocmget(struct tty_struct *tty);
+static int tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear);
+static int set_break(struct tty_struct *tty, int break_state);
+static int get_interface(struct slgt_info *info, int __user *if_mode);
+static int set_interface(struct slgt_info *info, int if_mode);
+static int set_gpio(struct slgt_info *info, struct gpio_desc __user *gpio);
+static int get_gpio(struct slgt_info *info, struct gpio_desc __user *gpio);
+static int wait_gpio(struct slgt_info *info, struct gpio_desc __user *gpio);
+static int get_xsync(struct slgt_info *info, int __user *if_mode);
+static int set_xsync(struct slgt_info *info, int if_mode);
+static int get_xctrl(struct slgt_info *info, int __user *if_mode);
+static int set_xctrl(struct slgt_info *info, int if_mode);
+
+/*
+ * driver functions
+ */
+static void add_device(struct slgt_info *info);
+static void device_init(int adapter_num, struct pci_dev *pdev);
+static int claim_resources(struct slgt_info *info);
+static void release_resources(struct slgt_info *info);
+
+/*
+ * DEBUG OUTPUT CODE
+ */
+#ifndef DBGINFO
+#define DBGINFO(fmt)
+#endif
+#ifndef DBGERR
+#define DBGERR(fmt)
+#endif
+#ifndef DBGBH
+#define DBGBH(fmt)
+#endif
+#ifndef DBGISR
+#define DBGISR(fmt)
+#endif
+
+#ifdef DBGDATA
+static void trace_block(struct slgt_info *info, const char *data, int count, const char *label)
+{
+ int i;
+ int linecount;
+ printk("%s %s data:\n",info->device_name, label);
+ while(count) {
+ linecount = (count > 16) ? 16 : count;
+ for(i=0; i < linecount; i++)
+ printk("%02X ",(unsigned char)data[i]);
+ for(;i<17;i++)
+ printk(" ");
+ for(i=0;i<linecount;i++) {
+ if (data[i]>=040 && data[i]<=0176)
+ printk("%c",data[i]);
+ else
+ printk(".");
+ }
+ printk("\n");
+ data += linecount;
+ count -= linecount;
+ }
+}
+#else
+#define DBGDATA(info, buf, size, label)
+#endif
+
+#ifdef DBGTBUF
+static void dump_tbufs(struct slgt_info *info)
+{
+ int i;
+ printk("tbuf_current=%d\n", info->tbuf_current);
+ for (i=0 ; i < info->tbuf_count ; i++) {
+ printk("%d: count=%04X status=%04X\n",
+ i, le16_to_cpu(info->tbufs[i].count), le16_to_cpu(info->tbufs[i].status));
+ }
+}
+#else
+#define DBGTBUF(info)
+#endif
+
+#ifdef DBGRBUF
+static void dump_rbufs(struct slgt_info *info)
+{
+ int i;
+ printk("rbuf_current=%d\n", info->rbuf_current);
+ for (i=0 ; i < info->rbuf_count ; i++) {
+ printk("%d: count=%04X status=%04X\n",
+ i, le16_to_cpu(info->rbufs[i].count), le16_to_cpu(info->rbufs[i].status));
+ }
+}
+#else
+#define DBGRBUF(info)
+#endif
+
+static inline int sanity_check(struct slgt_info *info, char *devname, const char *name)
+{
+#ifdef SANITY_CHECK
+ if (!info) {
+ printk("null struct slgt_info for (%s) in %s\n", devname, name);
+ return 1;
+ }
+ if (info->magic != MGSL_MAGIC) {
+ printk("bad magic number struct slgt_info (%s) in %s\n", devname, name);
+ return 1;
+ }
+#else
+ if (!info)
+ return 1;
+#endif
+ return 0;
+}
+
+/**
+ * line discipline callback wrappers
+ *
+ * The wrappers maintain line discipline references
+ * while calling into the line discipline.
+ *
+ * ldisc_receive_buf - pass receive data to line discipline
+ */
+static void ldisc_receive_buf(struct tty_struct *tty,
+ const __u8 *data, char *flags, int count)
+{
+ struct tty_ldisc *ld;
+ if (!tty)
+ return;
+ ld = tty_ldisc_ref(tty);
+ if (ld) {
+ if (ld->ops->receive_buf)
+ ld->ops->receive_buf(tty, data, flags, count);
+ tty_ldisc_deref(ld);
+ }
+}
+
+/* tty callbacks */
+
+static int open(struct tty_struct *tty, struct file *filp)
+{
+ struct slgt_info *info;
+ int retval, line;
+ unsigned long flags;
+
+ line = tty->index;
+ if ((line < 0) || (line >= slgt_device_count)) {
+ DBGERR(("%s: open with invalid line #%d.\n", driver_name, line));
+ return -ENODEV;
+ }
+
+ info = slgt_device_list;
+ while(info && info->line != line)
+ info = info->next_device;
+ if (sanity_check(info, tty->name, "open"))
+ return -ENODEV;
+ if (info->init_error) {
+ DBGERR(("%s init error=%d\n", info->device_name, info->init_error));
+ return -ENODEV;
+ }
+
+ tty->driver_data = info;
+ info->port.tty = tty;
+
+ DBGINFO(("%s open, old ref count = %d\n", info->device_name, info->port.count));
+
+ /* If port is closing, signal caller to try again */
+ if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
+ if (info->port.flags & ASYNC_CLOSING)
+ interruptible_sleep_on(&info->port.close_wait);
+ retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
+ -EAGAIN : -ERESTARTSYS);
+ goto cleanup;
+ }
+
+ mutex_lock(&info->port.mutex);
+ info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+
+ spin_lock_irqsave(&info->netlock, flags);
+ if (info->netcount) {
+ retval = -EBUSY;
+ spin_unlock_irqrestore(&info->netlock, flags);
+ mutex_unlock(&info->port.mutex);
+ goto cleanup;
+ }
+ info->port.count++;
+ spin_unlock_irqrestore(&info->netlock, flags);
+
+ if (info->port.count == 1) {
+ /* 1st open on this device, init hardware */
+ retval = startup(info);
+ if (retval < 0) {
+ mutex_unlock(&info->port.mutex);
+ goto cleanup;
+ }
+ }
+ mutex_unlock(&info->port.mutex);
+ retval = block_til_ready(tty, filp, info);
+ if (retval) {
+ DBGINFO(("%s block_til_ready rc=%d\n", info->device_name, retval));
+ goto cleanup;
+ }
+
+ retval = 0;
+
+cleanup:
+ if (retval) {
+ if (tty->count == 1)
+ info->port.tty = NULL; /* tty layer will release tty struct */
+ if(info->port.count)
+ info->port.count--;
+ }
+
+ DBGINFO(("%s open rc=%d\n", info->device_name, retval));
+ return retval;
+}
+
+static void close(struct tty_struct *tty, struct file *filp)
+{
+ struct slgt_info *info = tty->driver_data;
+
+ if (sanity_check(info, tty->name, "close"))
+ return;
+ DBGINFO(("%s close entry, count=%d\n", info->device_name, info->port.count));
+
+ if (tty_port_close_start(&info->port, tty, filp) == 0)
+ goto cleanup;
+
+ mutex_lock(&info->port.mutex);
+ if (info->port.flags & ASYNC_INITIALIZED)
+ wait_until_sent(tty, info->timeout);
+ flush_buffer(tty);
+ tty_ldisc_flush(tty);
+
+ shutdown(info);
+ mutex_unlock(&info->port.mutex);
+
+ tty_port_close_end(&info->port, tty);
+ info->port.tty = NULL;
+cleanup:
+ DBGINFO(("%s close exit, count=%d\n", tty->driver->name, info->port.count));
+}
+
+static void hangup(struct tty_struct *tty)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned long flags;
+
+ if (sanity_check(info, tty->name, "hangup"))
+ return;
+ DBGINFO(("%s hangup\n", info->device_name));
+
+ flush_buffer(tty);
+
+ mutex_lock(&info->port.mutex);
+ shutdown(info);
+
+ spin_lock_irqsave(&info->port.lock, flags);
+ info->port.count = 0;
+ info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
+ info->port.tty = NULL;
+ spin_unlock_irqrestore(&info->port.lock, flags);
+ mutex_unlock(&info->port.mutex);
+
+ wake_up_interruptible(&info->port.open_wait);
+}
+
+static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned long flags;
+
+ DBGINFO(("%s set_termios\n", tty->driver->name));
+
+ change_params(info);
+
+ /* Handle transition to B0 status */
+ if (old_termios->c_cflag & CBAUD &&
+ !(tty->termios->c_cflag & CBAUD)) {
+ info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+ spin_lock_irqsave(&info->lock,flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+
+ /* Handle transition away from B0 status */
+ if (!(old_termios->c_cflag & CBAUD) &&
+ tty->termios->c_cflag & CBAUD) {
+ info->signals |= SerialSignal_DTR;
+ if (!(tty->termios->c_cflag & CRTSCTS) ||
+ !test_bit(TTY_THROTTLED, &tty->flags)) {
+ info->signals |= SerialSignal_RTS;
+ }
+ spin_lock_irqsave(&info->lock,flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+
+ /* Handle turning off CRTSCTS */
+ if (old_termios->c_cflag & CRTSCTS &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ tx_release(tty);
+ }
+}
+
+static void update_tx_timer(struct slgt_info *info)
+{
+ /*
+ * use worst case speed of 1200bps to calculate transmit timeout
+ * based on data in buffers (tbuf_bytes) and FIFO (128 bytes)
+ */
+ if (info->params.mode == MGSL_MODE_HDLC) {
+ int timeout = (tbuf_bytes(info) * 7) + 1000;
+ mod_timer(&info->tx_timer, jiffies + msecs_to_jiffies(timeout));
+ }
+}
+
+static int write(struct tty_struct *tty,
+ const unsigned char *buf, int count)
+{
+ int ret = 0;
+ struct slgt_info *info = tty->driver_data;
+ unsigned long flags;
+
+ if (sanity_check(info, tty->name, "write"))
+ return -EIO;
+
+ DBGINFO(("%s write count=%d\n", info->device_name, count));
+
+ if (!info->tx_buf || (count > info->max_frame_size))
+ return -EIO;
+
+ if (!count || tty->stopped || tty->hw_stopped)
+ return 0;
+
+ spin_lock_irqsave(&info->lock, flags);
+
+ if (info->tx_count) {
+ /* send accumulated data from send_char() */
+ if (!tx_load(info, info->tx_buf, info->tx_count))
+ goto cleanup;
+ info->tx_count = 0;
+ }
+
+ if (tx_load(info, buf, count))
+ ret = count;
+
+cleanup:
+ spin_unlock_irqrestore(&info->lock, flags);
+ DBGINFO(("%s write rc=%d\n", info->device_name, ret));
+ return ret;
+}
+
+static int put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned long flags;
+ int ret = 0;
+
+ if (sanity_check(info, tty->name, "put_char"))
+ return 0;
+ DBGINFO(("%s put_char(%d)\n", info->device_name, ch));
+ if (!info->tx_buf)
+ return 0;
+ spin_lock_irqsave(&info->lock,flags);
+ if (info->tx_count < info->max_frame_size) {
+ info->tx_buf[info->tx_count++] = ch;
+ ret = 1;
+ }
+ spin_unlock_irqrestore(&info->lock,flags);
+ return ret;
+}
+
+static void send_xchar(struct tty_struct *tty, char ch)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned long flags;
+
+ if (sanity_check(info, tty->name, "send_xchar"))
+ return;
+ DBGINFO(("%s send_xchar(%d)\n", info->device_name, ch));
+ info->x_char = ch;
+ if (ch) {
+ spin_lock_irqsave(&info->lock,flags);
+ if (!info->tx_enabled)
+ tx_start(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+}
+
+static void wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned long orig_jiffies, char_time;
+
+ if (!info )
+ return;
+ if (sanity_check(info, tty->name, "wait_until_sent"))
+ return;
+ DBGINFO(("%s wait_until_sent entry\n", info->device_name));
+ if (!(info->port.flags & ASYNC_INITIALIZED))
+ goto exit;
+
+ orig_jiffies = jiffies;
+
+ /* Set check interval to 1/5 of estimated time to
+ * send a character, and make it at least 1. The check
+ * interval should also be less than the timeout.
+ * Note: use tight timings here to satisfy the NIST-PCTS.
+ */
+
+ if (info->params.data_rate) {
+ char_time = info->timeout/(32 * 5);
+ if (!char_time)
+ char_time++;
+ } else
+ char_time = 1;
+
+ if (timeout)
+ char_time = min_t(unsigned long, char_time, timeout);
+
+ while (info->tx_active) {
+ msleep_interruptible(jiffies_to_msecs(char_time));
+ if (signal_pending(current))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies + timeout))
+ break;
+ }
+exit:
+ DBGINFO(("%s wait_until_sent exit\n", info->device_name));
+}
+
+static int write_room(struct tty_struct *tty)
+{
+ struct slgt_info *info = tty->driver_data;
+ int ret;
+
+ if (sanity_check(info, tty->name, "write_room"))
+ return 0;
+ ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE;
+ DBGINFO(("%s write_room=%d\n", info->device_name, ret));
+ return ret;
+}
+
+static void flush_chars(struct tty_struct *tty)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned long flags;
+
+ if (sanity_check(info, tty->name, "flush_chars"))
+ return;
+ DBGINFO(("%s flush_chars entry tx_count=%d\n", info->device_name, info->tx_count));
+
+ if (info->tx_count <= 0 || tty->stopped ||
+ tty->hw_stopped || !info->tx_buf)
+ return;
+
+ DBGINFO(("%s flush_chars start transmit\n", info->device_name));
+
+ spin_lock_irqsave(&info->lock,flags);
+ if (info->tx_count && tx_load(info, info->tx_buf, info->tx_count))
+ info->tx_count = 0;
+ spin_unlock_irqrestore(&info->lock,flags);
+}
+
+static void flush_buffer(struct tty_struct *tty)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned long flags;
+
+ if (sanity_check(info, tty->name, "flush_buffer"))
+ return;
+ DBGINFO(("%s flush_buffer\n", info->device_name));
+
+ spin_lock_irqsave(&info->lock, flags);
+ info->tx_count = 0;
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ tty_wakeup(tty);
+}
+
+/*
+ * throttle (stop) transmitter
+ */
+static void tx_hold(struct tty_struct *tty)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned long flags;
+
+ if (sanity_check(info, tty->name, "tx_hold"))
+ return;
+ DBGINFO(("%s tx_hold\n", info->device_name));
+ spin_lock_irqsave(&info->lock,flags);
+ if (info->tx_enabled && info->params.mode == MGSL_MODE_ASYNC)
+ tx_stop(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+}
+
+/*
+ * release (start) transmitter
+ */
+static void tx_release(struct tty_struct *tty)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned long flags;
+
+ if (sanity_check(info, tty->name, "tx_release"))
+ return;
+ DBGINFO(("%s tx_release\n", info->device_name));
+ spin_lock_irqsave(&info->lock, flags);
+ if (info->tx_count && tx_load(info, info->tx_buf, info->tx_count))
+ info->tx_count = 0;
+ spin_unlock_irqrestore(&info->lock, flags);
+}
+
+/*
+ * Service an IOCTL request
+ *
+ * Arguments
+ *
+ * tty pointer to tty instance data
+ * cmd IOCTL command code
+ * arg command argument/context
+ *
+ * Return 0 if success, otherwise error code
+ */
+static int ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct slgt_info *info = tty->driver_data;
+ void __user *argp = (void __user *)arg;
+ int ret;
+
+ if (sanity_check(info, tty->name, "ioctl"))
+ return -ENODEV;
+ DBGINFO(("%s ioctl() cmd=%08X\n", info->device_name, cmd));
+
+ if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
+ (cmd != TIOCMIWAIT)) {
+ if (tty->flags & (1 << TTY_IO_ERROR))
+ return -EIO;
+ }
+
+ switch (cmd) {
+ case MGSL_IOCWAITEVENT:
+ return wait_mgsl_event(info, argp);
+ case TIOCMIWAIT:
+ return modem_input_wait(info,(int)arg);
+ case MGSL_IOCSGPIO:
+ return set_gpio(info, argp);
+ case MGSL_IOCGGPIO:
+ return get_gpio(info, argp);
+ case MGSL_IOCWAITGPIO:
+ return wait_gpio(info, argp);
+ case MGSL_IOCGXSYNC:
+ return get_xsync(info, argp);
+ case MGSL_IOCSXSYNC:
+ return set_xsync(info, (int)arg);
+ case MGSL_IOCGXCTRL:
+ return get_xctrl(info, argp);
+ case MGSL_IOCSXCTRL:
+ return set_xctrl(info, (int)arg);
+ }
+ mutex_lock(&info->port.mutex);
+ switch (cmd) {
+ case MGSL_IOCGPARAMS:
+ ret = get_params(info, argp);
+ break;
+ case MGSL_IOCSPARAMS:
+ ret = set_params(info, argp);
+ break;
+ case MGSL_IOCGTXIDLE:
+ ret = get_txidle(info, argp);
+ break;
+ case MGSL_IOCSTXIDLE:
+ ret = set_txidle(info, (int)arg);
+ break;
+ case MGSL_IOCTXENABLE:
+ ret = tx_enable(info, (int)arg);
+ break;
+ case MGSL_IOCRXENABLE:
+ ret = rx_enable(info, (int)arg);
+ break;
+ case MGSL_IOCTXABORT:
+ ret = tx_abort(info);
+ break;
+ case MGSL_IOCGSTATS:
+ ret = get_stats(info, argp);
+ break;
+ case MGSL_IOCGIF:
+ ret = get_interface(info, argp);
+ break;
+ case MGSL_IOCSIF:
+ ret = set_interface(info,(int)arg);
+ break;
+ default:
+ ret = -ENOIOCTLCMD;
+ }
+ mutex_unlock(&info->port.mutex);
+ return ret;
+}
+
+static int get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+
+{
+ struct slgt_info *info = tty->driver_data;
+ struct mgsl_icount cnow; /* kernel counter temps */
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+
+ return 0;
+}
+
+/*
+ * support for 32 bit ioctl calls on 64 bit systems
+ */
+#ifdef CONFIG_COMPAT
+static long get_params32(struct slgt_info *info, struct MGSL_PARAMS32 __user *user_params)
+{
+ struct MGSL_PARAMS32 tmp_params;
+
+ DBGINFO(("%s get_params32\n", info->device_name));
+ memset(&tmp_params, 0, sizeof(tmp_params));
+ tmp_params.mode = (compat_ulong_t)info->params.mode;
+ tmp_params.loopback = info->params.loopback;
+ tmp_params.flags = info->params.flags;
+ tmp_params.encoding = info->params.encoding;
+ tmp_params.clock_speed = (compat_ulong_t)info->params.clock_speed;
+ tmp_params.addr_filter = info->params.addr_filter;
+ tmp_params.crc_type = info->params.crc_type;
+ tmp_params.preamble_length = info->params.preamble_length;
+ tmp_params.preamble = info->params.preamble;
+ tmp_params.data_rate = (compat_ulong_t)info->params.data_rate;
+ tmp_params.data_bits = info->params.data_bits;
+ tmp_params.stop_bits = info->params.stop_bits;
+ tmp_params.parity = info->params.parity;
+ if (copy_to_user(user_params, &tmp_params, sizeof(struct MGSL_PARAMS32)))
+ return -EFAULT;
+ return 0;
+}
+
+static long set_params32(struct slgt_info *info, struct MGSL_PARAMS32 __user *new_params)
+{
+ struct MGSL_PARAMS32 tmp_params;
+
+ DBGINFO(("%s set_params32\n", info->device_name));
+ if (copy_from_user(&tmp_params, new_params, sizeof(struct MGSL_PARAMS32)))
+ return -EFAULT;
+
+ spin_lock(&info->lock);
+ if (tmp_params.mode == MGSL_MODE_BASE_CLOCK) {
+ info->base_clock = tmp_params.clock_speed;
+ } else {
+ info->params.mode = tmp_params.mode;
+ info->params.loopback = tmp_params.loopback;
+ info->params.flags = tmp_params.flags;
+ info->params.encoding = tmp_params.encoding;
+ info->params.clock_speed = tmp_params.clock_speed;
+ info->params.addr_filter = tmp_params.addr_filter;
+ info->params.crc_type = tmp_params.crc_type;
+ info->params.preamble_length = tmp_params.preamble_length;
+ info->params.preamble = tmp_params.preamble;
+ info->params.data_rate = tmp_params.data_rate;
+ info->params.data_bits = tmp_params.data_bits;
+ info->params.stop_bits = tmp_params.stop_bits;
+ info->params.parity = tmp_params.parity;
+ }
+ spin_unlock(&info->lock);
+
+ program_hw(info);
+
+ return 0;
+}
+
+static long slgt_compat_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct slgt_info *info = tty->driver_data;
+ int rc = -ENOIOCTLCMD;
+
+ if (sanity_check(info, tty->name, "compat_ioctl"))
+ return -ENODEV;
+ DBGINFO(("%s compat_ioctl() cmd=%08X\n", info->device_name, cmd));
+
+ switch (cmd) {
+
+ case MGSL_IOCSPARAMS32:
+ rc = set_params32(info, compat_ptr(arg));
+ break;
+
+ case MGSL_IOCGPARAMS32:
+ rc = get_params32(info, compat_ptr(arg));
+ break;
+
+ case MGSL_IOCGPARAMS:
+ case MGSL_IOCSPARAMS:
+ case MGSL_IOCGTXIDLE:
+ case MGSL_IOCGSTATS:
+ case MGSL_IOCWAITEVENT:
+ case MGSL_IOCGIF:
+ case MGSL_IOCSGPIO:
+ case MGSL_IOCGGPIO:
+ case MGSL_IOCWAITGPIO:
+ case MGSL_IOCGXSYNC:
+ case MGSL_IOCGXCTRL:
+ case MGSL_IOCSTXIDLE:
+ case MGSL_IOCTXENABLE:
+ case MGSL_IOCRXENABLE:
+ case MGSL_IOCTXABORT:
+ case TIOCMIWAIT:
+ case MGSL_IOCSIF:
+ case MGSL_IOCSXSYNC:
+ case MGSL_IOCSXCTRL:
+ rc = ioctl(tty, cmd, arg);
+ break;
+ }
+
+ DBGINFO(("%s compat_ioctl() cmd=%08X rc=%d\n", info->device_name, cmd, rc));
+ return rc;
+}
+#else
+#define slgt_compat_ioctl NULL
+#endif /* ifdef CONFIG_COMPAT */
+
+/*
+ * proc fs support
+ */
+static inline void line_info(struct seq_file *m, struct slgt_info *info)
+{
+ char stat_buf[30];
+ unsigned long flags;
+
+ seq_printf(m, "%s: IO=%08X IRQ=%d MaxFrameSize=%u\n",
+ info->device_name, info->phys_reg_addr,
+ info->irq_level, info->max_frame_size);
+
+ /* output current serial signal states */
+ spin_lock_irqsave(&info->lock,flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ stat_buf[0] = 0;
+ stat_buf[1] = 0;
+ if (info->signals & SerialSignal_RTS)
+ strcat(stat_buf, "|RTS");
+ if (info->signals & SerialSignal_CTS)
+ strcat(stat_buf, "|CTS");
+ if (info->signals & SerialSignal_DTR)
+ strcat(stat_buf, "|DTR");
+ if (info->signals & SerialSignal_DSR)
+ strcat(stat_buf, "|DSR");
+ if (info->signals & SerialSignal_DCD)
+ strcat(stat_buf, "|CD");
+ if (info->signals & SerialSignal_RI)
+ strcat(stat_buf, "|RI");
+
+ if (info->params.mode != MGSL_MODE_ASYNC) {
+ seq_printf(m, "\tHDLC txok:%d rxok:%d",
+ info->icount.txok, info->icount.rxok);
+ if (info->icount.txunder)
+ seq_printf(m, " txunder:%d", info->icount.txunder);
+ if (info->icount.txabort)
+ seq_printf(m, " txabort:%d", info->icount.txabort);
+ if (info->icount.rxshort)
+ seq_printf(m, " rxshort:%d", info->icount.rxshort);
+ if (info->icount.rxlong)
+ seq_printf(m, " rxlong:%d", info->icount.rxlong);
+ if (info->icount.rxover)
+ seq_printf(m, " rxover:%d", info->icount.rxover);
+ if (info->icount.rxcrc)
+ seq_printf(m, " rxcrc:%d", info->icount.rxcrc);
+ } else {
+ seq_printf(m, "\tASYNC tx:%d rx:%d",
+ info->icount.tx, info->icount.rx);
+ if (info->icount.frame)
+ seq_printf(m, " fe:%d", info->icount.frame);
+ if (info->icount.parity)
+ seq_printf(m, " pe:%d", info->icount.parity);
+ if (info->icount.brk)
+ seq_printf(m, " brk:%d", info->icount.brk);
+ if (info->icount.overrun)
+ seq_printf(m, " oe:%d", info->icount.overrun);
+ }
+
+ /* Append serial signal status to end */
+ seq_printf(m, " %s\n", stat_buf+1);
+
+ seq_printf(m, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
+ info->tx_active,info->bh_requested,info->bh_running,
+ info->pending_bh);
+}
+
+/* Called to print information about devices
+ */
+static int synclink_gt_proc_show(struct seq_file *m, void *v)
+{
+ struct slgt_info *info;
+
+ seq_puts(m, "synclink_gt driver\n");
+
+ info = slgt_device_list;
+ while( info ) {
+ line_info(m, info);
+ info = info->next_device;
+ }
+ return 0;
+}
+
+static int synclink_gt_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, synclink_gt_proc_show, NULL);
+}
+
+static const struct file_operations synclink_gt_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = synclink_gt_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/*
+ * return count of bytes in transmit buffer
+ */
+static int chars_in_buffer(struct tty_struct *tty)
+{
+ struct slgt_info *info = tty->driver_data;
+ int count;
+ if (sanity_check(info, tty->name, "chars_in_buffer"))
+ return 0;
+ count = tbuf_bytes(info);
+ DBGINFO(("%s chars_in_buffer()=%d\n", info->device_name, count));
+ return count;
+}
+
+/*
+ * signal remote device to throttle send data (our receive data)
+ */
+static void throttle(struct tty_struct * tty)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned long flags;
+
+ if (sanity_check(info, tty->name, "throttle"))
+ return;
+ DBGINFO(("%s throttle\n", info->device_name));
+ if (I_IXOFF(tty))
+ send_xchar(tty, STOP_CHAR(tty));
+ if (tty->termios->c_cflag & CRTSCTS) {
+ spin_lock_irqsave(&info->lock,flags);
+ info->signals &= ~SerialSignal_RTS;
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+}
+
+/*
+ * signal remote device to stop throttling send data (our receive data)
+ */
+static void unthrottle(struct tty_struct * tty)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned long flags;
+
+ if (sanity_check(info, tty->name, "unthrottle"))
+ return;
+ DBGINFO(("%s unthrottle\n", info->device_name));
+ if (I_IXOFF(tty)) {
+ if (info->x_char)
+ info->x_char = 0;
+ else
+ send_xchar(tty, START_CHAR(tty));
+ }
+ if (tty->termios->c_cflag & CRTSCTS) {
+ spin_lock_irqsave(&info->lock,flags);
+ info->signals |= SerialSignal_RTS;
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+}
+
+/*
+ * set or clear transmit break condition
+ * break_state -1=set break condition, 0=clear
+ */
+static int set_break(struct tty_struct *tty, int break_state)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned short value;
+ unsigned long flags;
+
+ if (sanity_check(info, tty->name, "set_break"))
+ return -EINVAL;
+ DBGINFO(("%s set_break(%d)\n", info->device_name, break_state));
+
+ spin_lock_irqsave(&info->lock,flags);
+ value = rd_reg16(info, TCR);
+ if (break_state == -1)
+ value |= BIT6;
+ else
+ value &= ~BIT6;
+ wr_reg16(info, TCR, value);
+ spin_unlock_irqrestore(&info->lock,flags);
+ return 0;
+}
+
+#if SYNCLINK_GENERIC_HDLC
+
+/**
+ * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
+ * set encoding and frame check sequence (FCS) options
+ *
+ * dev pointer to network device structure
+ * encoding serial encoding setting
+ * parity FCS setting
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ struct slgt_info *info = dev_to_port(dev);
+ unsigned char new_encoding;
+ unsigned short new_crctype;
+
+ /* return error if TTY interface open */
+ if (info->port.count)
+ return -EBUSY;
+
+ DBGINFO(("%s hdlcdev_attach\n", info->device_name));
+
+ switch (encoding)
+ {
+ case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
+ case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
+ case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
+ case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
+ case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
+ default: return -EINVAL;
+ }
+
+ switch (parity)
+ {
+ case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
+ case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
+ case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
+ default: return -EINVAL;
+ }
+
+ info->params.encoding = new_encoding;
+ info->params.crc_type = new_crctype;
+
+ /* if network interface up, reprogram hardware */
+ if (info->netcount)
+ program_hw(info);
+
+ return 0;
+}
+
+/**
+ * called by generic HDLC layer to send frame
+ *
+ * skb socket buffer containing HDLC frame
+ * dev pointer to network device structure
+ */
+static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct slgt_info *info = dev_to_port(dev);
+ unsigned long flags;
+
+ DBGINFO(("%s hdlc_xmit\n", dev->name));
+
+ if (!skb->len)
+ return NETDEV_TX_OK;
+
+ /* stop sending until this frame completes */
+ netif_stop_queue(dev);
+
+ /* update network statistics */
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+
+ /* save start time for transmit timeout detection */
+ dev->trans_start = jiffies;
+
+ spin_lock_irqsave(&info->lock, flags);
+ tx_load(info, skb->data, skb->len);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ /* done with socket buffer, so free it */
+ dev_kfree_skb(skb);
+
+ return NETDEV_TX_OK;
+}
+
+/**
+ * called by network layer when interface enabled
+ * claim resources and initialize hardware
+ *
+ * dev pointer to network device structure
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_open(struct net_device *dev)
+{
+ struct slgt_info *info = dev_to_port(dev);
+ int rc;
+ unsigned long flags;
+
+ if (!try_module_get(THIS_MODULE))
+ return -EBUSY;
+
+ DBGINFO(("%s hdlcdev_open\n", dev->name));
+
+ /* generic HDLC layer open processing */
+ if ((rc = hdlc_open(dev)))
+ return rc;
+
+ /* arbitrate between network and tty opens */
+ spin_lock_irqsave(&info->netlock, flags);
+ if (info->port.count != 0 || info->netcount != 0) {
+ DBGINFO(("%s hdlc_open busy\n", dev->name));
+ spin_unlock_irqrestore(&info->netlock, flags);
+ return -EBUSY;
+ }
+ info->netcount=1;
+ spin_unlock_irqrestore(&info->netlock, flags);
+
+ /* claim resources and init adapter */
+ if ((rc = startup(info)) != 0) {
+ spin_lock_irqsave(&info->netlock, flags);
+ info->netcount=0;
+ spin_unlock_irqrestore(&info->netlock, flags);
+ return rc;
+ }
+
+ /* assert DTR and RTS, apply hardware settings */
+ info->signals |= SerialSignal_RTS + SerialSignal_DTR;
+ program_hw(info);
+
+ /* enable network layer transmit */
+ dev->trans_start = jiffies;
+ netif_start_queue(dev);
+
+ /* inform generic HDLC layer of current DCD status */
+ spin_lock_irqsave(&info->lock, flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+ if (info->signals & SerialSignal_DCD)
+ netif_carrier_on(dev);
+ else
+ netif_carrier_off(dev);
+ return 0;
+}
+
+/**
+ * called by network layer when interface is disabled
+ * shutdown hardware and release resources
+ *
+ * dev pointer to network device structure
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_close(struct net_device *dev)
+{
+ struct slgt_info *info = dev_to_port(dev);
+ unsigned long flags;
+
+ DBGINFO(("%s hdlcdev_close\n", dev->name));
+
+ netif_stop_queue(dev);
+
+ /* shutdown adapter and release resources */
+ shutdown(info);
+
+ hdlc_close(dev);
+
+ spin_lock_irqsave(&info->netlock, flags);
+ info->netcount=0;
+ spin_unlock_irqrestore(&info->netlock, flags);
+
+ module_put(THIS_MODULE);
+ return 0;
+}
+
+/**
+ * called by network layer to process IOCTL call to network device
+ *
+ * dev pointer to network device structure
+ * ifr pointer to network interface request structure
+ * cmd IOCTL command code
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ const size_t size = sizeof(sync_serial_settings);
+ sync_serial_settings new_line;
+ sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
+ struct slgt_info *info = dev_to_port(dev);
+ unsigned int flags;
+
+ DBGINFO(("%s hdlcdev_ioctl\n", dev->name));
+
+ /* return error if TTY interface open */
+ if (info->port.count)
+ return -EBUSY;
+
+ if (cmd != SIOCWANDEV)
+ return hdlc_ioctl(dev, ifr, cmd);
+
+ memset(&new_line, 0, sizeof(new_line));
+
+ switch(ifr->ifr_settings.type) {
+ case IF_GET_IFACE: /* return current sync_serial_settings */
+
+ ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
+ if (ifr->ifr_settings.size < size) {
+ ifr->ifr_settings.size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+
+ flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
+ HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
+ HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
+ HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
+
+ switch (flags){
+ case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
+ case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
+ case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
+ case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
+ default: new_line.clock_type = CLOCK_DEFAULT;
+ }
+
+ new_line.clock_rate = info->params.clock_speed;
+ new_line.loopback = info->params.loopback ? 1:0;
+
+ if (copy_to_user(line, &new_line, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
+
+ if(!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (copy_from_user(&new_line, line, size))
+ return -EFAULT;
+
+ switch (new_line.clock_type)
+ {
+ case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
+ case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
+ case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
+ case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
+ case CLOCK_DEFAULT: flags = info->params.flags &
+ (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
+ HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
+ HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
+ HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
+ default: return -EINVAL;
+ }
+
+ if (new_line.loopback != 0 && new_line.loopback != 1)
+ return -EINVAL;
+
+ info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
+ HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
+ HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
+ HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
+ info->params.flags |= flags;
+
+ info->params.loopback = new_line.loopback;
+
+ if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
+ info->params.clock_speed = new_line.clock_rate;
+ else
+ info->params.clock_speed = 0;
+
+ /* if network interface up, reprogram hardware */
+ if (info->netcount)
+ program_hw(info);
+ return 0;
+
+ default:
+ return hdlc_ioctl(dev, ifr, cmd);
+ }
+}
+
+/**
+ * called by network layer when transmit timeout is detected
+ *
+ * dev pointer to network device structure
+ */
+static void hdlcdev_tx_timeout(struct net_device *dev)
+{
+ struct slgt_info *info = dev_to_port(dev);
+ unsigned long flags;
+
+ DBGINFO(("%s hdlcdev_tx_timeout\n", dev->name));
+
+ dev->stats.tx_errors++;
+ dev->stats.tx_aborted_errors++;
+
+ spin_lock_irqsave(&info->lock,flags);
+ tx_stop(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ netif_wake_queue(dev);
+}
+
+/**
+ * called by device driver when transmit completes
+ * reenable network layer transmit if stopped
+ *
+ * info pointer to device instance information
+ */
+static void hdlcdev_tx_done(struct slgt_info *info)
+{
+ if (netif_queue_stopped(info->netdev))
+ netif_wake_queue(info->netdev);
+}
+
+/**
+ * called by device driver when frame received
+ * pass frame to network layer
+ *
+ * info pointer to device instance information
+ * buf pointer to buffer contianing frame data
+ * size count of data bytes in buf
+ */
+static void hdlcdev_rx(struct slgt_info *info, char *buf, int size)
+{
+ struct sk_buff *skb = dev_alloc_skb(size);
+ struct net_device *dev = info->netdev;
+
+ DBGINFO(("%s hdlcdev_rx\n", dev->name));
+
+ if (skb == NULL) {
+ DBGERR(("%s: can't alloc skb, drop packet\n", dev->name));
+ dev->stats.rx_dropped++;
+ return;
+ }
+
+ memcpy(skb_put(skb, size), buf, size);
+
+ skb->protocol = hdlc_type_trans(skb, dev);
+
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += size;
+
+ netif_rx(skb);
+}
+
+static const struct net_device_ops hdlcdev_ops = {
+ .ndo_open = hdlcdev_open,
+ .ndo_stop = hdlcdev_close,
+ .ndo_change_mtu = hdlc_change_mtu,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_do_ioctl = hdlcdev_ioctl,
+ .ndo_tx_timeout = hdlcdev_tx_timeout,
+};
+
+/**
+ * called by device driver when adding device instance
+ * do generic HDLC initialization
+ *
+ * info pointer to device instance information
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_init(struct slgt_info *info)
+{
+ int rc;
+ struct net_device *dev;
+ hdlc_device *hdlc;
+
+ /* allocate and initialize network and HDLC layer objects */
+
+ if (!(dev = alloc_hdlcdev(info))) {
+ printk(KERN_ERR "%s hdlc device alloc failure\n", info->device_name);
+ return -ENOMEM;
+ }
+
+ /* for network layer reporting purposes only */
+ dev->mem_start = info->phys_reg_addr;
+ dev->mem_end = info->phys_reg_addr + SLGT_REG_SIZE - 1;
+ dev->irq = info->irq_level;
+
+ /* network layer callbacks and settings */
+ dev->netdev_ops = &hdlcdev_ops;
+ dev->watchdog_timeo = 10 * HZ;
+ dev->tx_queue_len = 50;
+
+ /* generic HDLC layer callbacks and settings */
+ hdlc = dev_to_hdlc(dev);
+ hdlc->attach = hdlcdev_attach;
+ hdlc->xmit = hdlcdev_xmit;
+
+ /* register objects with HDLC layer */
+ if ((rc = register_hdlc_device(dev))) {
+ printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
+ free_netdev(dev);
+ return rc;
+ }
+
+ info->netdev = dev;
+ return 0;
+}
+
+/**
+ * called by device driver when removing device instance
+ * do generic HDLC cleanup
+ *
+ * info pointer to device instance information
+ */
+static void hdlcdev_exit(struct slgt_info *info)
+{
+ unregister_hdlc_device(info->netdev);
+ free_netdev(info->netdev);
+ info->netdev = NULL;
+}
+
+#endif /* ifdef CONFIG_HDLC */
+
+/*
+ * get async data from rx DMA buffers
+ */
+static void rx_async(struct slgt_info *info)
+{
+ struct tty_struct *tty = info->port.tty;
+ struct mgsl_icount *icount = &info->icount;
+ unsigned int start, end;
+ unsigned char *p;
+ unsigned char status;
+ struct slgt_desc *bufs = info->rbufs;
+ int i, count;
+ int chars = 0;
+ int stat;
+ unsigned char ch;
+
+ start = end = info->rbuf_current;
+
+ while(desc_complete(bufs[end])) {
+ count = desc_count(bufs[end]) - info->rbuf_index;
+ p = bufs[end].buf + info->rbuf_index;
+
+ DBGISR(("%s rx_async count=%d\n", info->device_name, count));
+ DBGDATA(info, p, count, "rx");
+
+ for(i=0 ; i < count; i+=2, p+=2) {
+ ch = *p;
+ icount->rx++;
+
+ stat = 0;
+
+ if ((status = *(p+1) & (BIT1 + BIT0))) {
+ if (status & BIT1)
+ icount->parity++;
+ else if (status & BIT0)
+ icount->frame++;
+ /* discard char if tty control flags say so */
+ if (status & info->ignore_status_mask)
+ continue;
+ if (status & BIT1)
+ stat = TTY_PARITY;
+ else if (status & BIT0)
+ stat = TTY_FRAME;
+ }
+ if (tty) {
+ tty_insert_flip_char(tty, ch, stat);
+ chars++;
+ }
+ }
+
+ if (i < count) {
+ /* receive buffer not completed */
+ info->rbuf_index += i;
+ mod_timer(&info->rx_timer, jiffies + 1);
+ break;
+ }
+
+ info->rbuf_index = 0;
+ free_rbufs(info, end, end);
+
+ if (++end == info->rbuf_count)
+ end = 0;
+
+ /* if entire list searched then no frame available */
+ if (end == start)
+ break;
+ }
+
+ if (tty && chars)
+ tty_flip_buffer_push(tty);
+}
+
+/*
+ * return next bottom half action to perform
+ */
+static int bh_action(struct slgt_info *info)
+{
+ unsigned long flags;
+ int rc;
+
+ spin_lock_irqsave(&info->lock,flags);
+
+ if (info->pending_bh & BH_RECEIVE) {
+ info->pending_bh &= ~BH_RECEIVE;
+ rc = BH_RECEIVE;
+ } else if (info->pending_bh & BH_TRANSMIT) {
+ info->pending_bh &= ~BH_TRANSMIT;
+ rc = BH_TRANSMIT;
+ } else if (info->pending_bh & BH_STATUS) {
+ info->pending_bh &= ~BH_STATUS;
+ rc = BH_STATUS;
+ } else {
+ /* Mark BH routine as complete */
+ info->bh_running = false;
+ info->bh_requested = false;
+ rc = 0;
+ }
+
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ return rc;
+}
+
+/*
+ * perform bottom half processing
+ */
+static void bh_handler(struct work_struct *work)
+{
+ struct slgt_info *info = container_of(work, struct slgt_info, task);
+ int action;
+
+ if (!info)
+ return;
+ info->bh_running = true;
+
+ while((action = bh_action(info))) {
+ switch (action) {
+ case BH_RECEIVE:
+ DBGBH(("%s bh receive\n", info->device_name));
+ switch(info->params.mode) {
+ case MGSL_MODE_ASYNC:
+ rx_async(info);
+ break;
+ case MGSL_MODE_HDLC:
+ while(rx_get_frame(info));
+ break;
+ case MGSL_MODE_RAW:
+ case MGSL_MODE_MONOSYNC:
+ case MGSL_MODE_BISYNC:
+ case MGSL_MODE_XSYNC:
+ while(rx_get_buf(info));
+ break;
+ }
+ /* restart receiver if rx DMA buffers exhausted */
+ if (info->rx_restart)
+ rx_start(info);
+ break;
+ case BH_TRANSMIT:
+ bh_transmit(info);
+ break;
+ case BH_STATUS:
+ DBGBH(("%s bh status\n", info->device_name));
+ info->ri_chkcount = 0;
+ info->dsr_chkcount = 0;
+ info->dcd_chkcount = 0;
+ info->cts_chkcount = 0;
+ break;
+ default:
+ DBGBH(("%s unknown action\n", info->device_name));
+ break;
+ }
+ }
+ DBGBH(("%s bh_handler exit\n", info->device_name));
+}
+
+static void bh_transmit(struct slgt_info *info)
+{
+ struct tty_struct *tty = info->port.tty;
+
+ DBGBH(("%s bh_transmit\n", info->device_name));
+ if (tty)
+ tty_wakeup(tty);
+}
+
+static void dsr_change(struct slgt_info *info, unsigned short status)
+{
+ if (status & BIT3) {
+ info->signals |= SerialSignal_DSR;
+ info->input_signal_events.dsr_up++;
+ } else {
+ info->signals &= ~SerialSignal_DSR;
+ info->input_signal_events.dsr_down++;
+ }
+ DBGISR(("dsr_change %s signals=%04X\n", info->device_name, info->signals));
+ if ((info->dsr_chkcount)++ == IO_PIN_SHUTDOWN_LIMIT) {
+ slgt_irq_off(info, IRQ_DSR);
+ return;
+ }
+ info->icount.dsr++;
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+ info->pending_bh |= BH_STATUS;
+}
+
+static void cts_change(struct slgt_info *info, unsigned short status)
+{
+ if (status & BIT2) {
+ info->signals |= SerialSignal_CTS;
+ info->input_signal_events.cts_up++;
+ } else {
+ info->signals &= ~SerialSignal_CTS;
+ info->input_signal_events.cts_down++;
+ }
+ DBGISR(("cts_change %s signals=%04X\n", info->device_name, info->signals));
+ if ((info->cts_chkcount)++ == IO_PIN_SHUTDOWN_LIMIT) {
+ slgt_irq_off(info, IRQ_CTS);
+ return;
+ }
+ info->icount.cts++;
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+ info->pending_bh |= BH_STATUS;
+
+ if (info->port.flags & ASYNC_CTS_FLOW) {
+ if (info->port.tty) {
+ if (info->port.tty->hw_stopped) {
+ if (info->signals & SerialSignal_CTS) {
+ info->port.tty->hw_stopped = 0;
+ info->pending_bh |= BH_TRANSMIT;
+ return;
+ }
+ } else {
+ if (!(info->signals & SerialSignal_CTS))
+ info->port.tty->hw_stopped = 1;
+ }
+ }
+ }
+}
+
+static void dcd_change(struct slgt_info *info, unsigned short status)
+{
+ if (status & BIT1) {
+ info->signals |= SerialSignal_DCD;
+ info->input_signal_events.dcd_up++;
+ } else {
+ info->signals &= ~SerialSignal_DCD;
+ info->input_signal_events.dcd_down++;
+ }
+ DBGISR(("dcd_change %s signals=%04X\n", info->device_name, info->signals));
+ if ((info->dcd_chkcount)++ == IO_PIN_SHUTDOWN_LIMIT) {
+ slgt_irq_off(info, IRQ_DCD);
+ return;
+ }
+ info->icount.dcd++;
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount) {
+ if (info->signals & SerialSignal_DCD)
+ netif_carrier_on(info->netdev);
+ else
+ netif_carrier_off(info->netdev);
+ }
+#endif
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+ info->pending_bh |= BH_STATUS;
+
+ if (info->port.flags & ASYNC_CHECK_CD) {
+ if (info->signals & SerialSignal_DCD)
+ wake_up_interruptible(&info->port.open_wait);
+ else {
+ if (info->port.tty)
+ tty_hangup(info->port.tty);
+ }
+ }
+}
+
+static void ri_change(struct slgt_info *info, unsigned short status)
+{
+ if (status & BIT0) {
+ info->signals |= SerialSignal_RI;
+ info->input_signal_events.ri_up++;
+ } else {
+ info->signals &= ~SerialSignal_RI;
+ info->input_signal_events.ri_down++;
+ }
+ DBGISR(("ri_change %s signals=%04X\n", info->device_name, info->signals));
+ if ((info->ri_chkcount)++ == IO_PIN_SHUTDOWN_LIMIT) {
+ slgt_irq_off(info, IRQ_RI);
+ return;
+ }
+ info->icount.rng++;
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+ info->pending_bh |= BH_STATUS;
+}
+
+static void isr_rxdata(struct slgt_info *info)
+{
+ unsigned int count = info->rbuf_fill_count;
+ unsigned int i = info->rbuf_fill_index;
+ unsigned short reg;
+
+ while (rd_reg16(info, SSR) & IRQ_RXDATA) {
+ reg = rd_reg16(info, RDR);
+ DBGISR(("isr_rxdata %s RDR=%04X\n", info->device_name, reg));
+ if (desc_complete(info->rbufs[i])) {
+ /* all buffers full */
+ rx_stop(info);
+ info->rx_restart = 1;
+ continue;
+ }
+ info->rbufs[i].buf[count++] = (unsigned char)reg;
+ /* async mode saves status byte to buffer for each data byte */
+ if (info->params.mode == MGSL_MODE_ASYNC)
+ info->rbufs[i].buf[count++] = (unsigned char)(reg >> 8);
+ if (count == info->rbuf_fill_level || (reg & BIT10)) {
+ /* buffer full or end of frame */
+ set_desc_count(info->rbufs[i], count);
+ set_desc_status(info->rbufs[i], BIT15 | (reg >> 8));
+ info->rbuf_fill_count = count = 0;
+ if (++i == info->rbuf_count)
+ i = 0;
+ info->pending_bh |= BH_RECEIVE;
+ }
+ }
+
+ info->rbuf_fill_index = i;
+ info->rbuf_fill_count = count;
+}
+
+static void isr_serial(struct slgt_info *info)
+{
+ unsigned short status = rd_reg16(info, SSR);
+
+ DBGISR(("%s isr_serial status=%04X\n", info->device_name, status));
+
+ wr_reg16(info, SSR, status); /* clear pending */
+
+ info->irq_occurred = true;
+
+ if (info->params.mode == MGSL_MODE_ASYNC) {
+ if (status & IRQ_TXIDLE) {
+ if (info->tx_active)
+ isr_txeom(info, status);
+ }
+ if (info->rx_pio && (status & IRQ_RXDATA))
+ isr_rxdata(info);
+ if ((status & IRQ_RXBREAK) && (status & RXBREAK)) {
+ info->icount.brk++;
+ /* process break detection if tty control allows */
+ if (info->port.tty) {
+ if (!(status & info->ignore_status_mask)) {
+ if (info->read_status_mask & MASK_BREAK) {
+ tty_insert_flip_char(info->port.tty, 0, TTY_BREAK);
+ if (info->port.flags & ASYNC_SAK)
+ do_SAK(info->port.tty);
+ }
+ }
+ }
+ }
+ } else {
+ if (status & (IRQ_TXIDLE + IRQ_TXUNDER))
+ isr_txeom(info, status);
+ if (info->rx_pio && (status & IRQ_RXDATA))
+ isr_rxdata(info);
+ if (status & IRQ_RXIDLE) {
+ if (status & RXIDLE)
+ info->icount.rxidle++;
+ else
+ info->icount.exithunt++;
+ wake_up_interruptible(&info->event_wait_q);
+ }
+
+ if (status & IRQ_RXOVER)
+ rx_start(info);
+ }
+
+ if (status & IRQ_DSR)
+ dsr_change(info, status);
+ if (status & IRQ_CTS)
+ cts_change(info, status);
+ if (status & IRQ_DCD)
+ dcd_change(info, status);
+ if (status & IRQ_RI)
+ ri_change(info, status);
+}
+
+static void isr_rdma(struct slgt_info *info)
+{
+ unsigned int status = rd_reg32(info, RDCSR);
+
+ DBGISR(("%s isr_rdma status=%08x\n", info->device_name, status));
+
+ /* RDCSR (rx DMA control/status)
+ *
+ * 31..07 reserved
+ * 06 save status byte to DMA buffer
+ * 05 error
+ * 04 eol (end of list)
+ * 03 eob (end of buffer)
+ * 02 IRQ enable
+ * 01 reset
+ * 00 enable
+ */
+ wr_reg32(info, RDCSR, status); /* clear pending */
+
+ if (status & (BIT5 + BIT4)) {
+ DBGISR(("%s isr_rdma rx_restart=1\n", info->device_name));
+ info->rx_restart = true;
+ }
+ info->pending_bh |= BH_RECEIVE;
+}
+
+static void isr_tdma(struct slgt_info *info)
+{
+ unsigned int status = rd_reg32(info, TDCSR);
+
+ DBGISR(("%s isr_tdma status=%08x\n", info->device_name, status));
+
+ /* TDCSR (tx DMA control/status)
+ *
+ * 31..06 reserved
+ * 05 error
+ * 04 eol (end of list)
+ * 03 eob (end of buffer)
+ * 02 IRQ enable
+ * 01 reset
+ * 00 enable
+ */
+ wr_reg32(info, TDCSR, status); /* clear pending */
+
+ if (status & (BIT5 + BIT4 + BIT3)) {
+ // another transmit buffer has completed
+ // run bottom half to get more send data from user
+ info->pending_bh |= BH_TRANSMIT;
+ }
+}
+
+/*
+ * return true if there are unsent tx DMA buffers, otherwise false
+ *
+ * if there are unsent buffers then info->tbuf_start
+ * is set to index of first unsent buffer
+ */
+static bool unsent_tbufs(struct slgt_info *info)
+{
+ unsigned int i = info->tbuf_current;
+ bool rc = false;
+
+ /*
+ * search backwards from last loaded buffer (precedes tbuf_current)
+ * for first unsent buffer (desc_count > 0)
+ */
+
+ do {
+ if (i)
+ i--;
+ else
+ i = info->tbuf_count - 1;
+ if (!desc_count(info->tbufs[i]))
+ break;
+ info->tbuf_start = i;
+ rc = true;
+ } while (i != info->tbuf_current);
+
+ return rc;
+}
+
+static void isr_txeom(struct slgt_info *info, unsigned short status)
+{
+ DBGISR(("%s txeom status=%04x\n", info->device_name, status));
+
+ slgt_irq_off(info, IRQ_TXDATA + IRQ_TXIDLE + IRQ_TXUNDER);
+ tdma_reset(info);
+ if (status & IRQ_TXUNDER) {
+ unsigned short val = rd_reg16(info, TCR);
+ wr_reg16(info, TCR, (unsigned short)(val | BIT2)); /* set reset bit */
+ wr_reg16(info, TCR, val); /* clear reset bit */
+ }
+
+ if (info->tx_active) {
+ if (info->params.mode != MGSL_MODE_ASYNC) {
+ if (status & IRQ_TXUNDER)
+ info->icount.txunder++;
+ else if (status & IRQ_TXIDLE)
+ info->icount.txok++;
+ }
+
+ if (unsent_tbufs(info)) {
+ tx_start(info);
+ update_tx_timer(info);
+ return;
+ }
+ info->tx_active = false;
+
+ del_timer(&info->tx_timer);
+
+ if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done) {
+ info->signals &= ~SerialSignal_RTS;
+ info->drop_rts_on_tx_done = false;
+ set_signals(info);
+ }
+
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount)
+ hdlcdev_tx_done(info);
+ else
+#endif
+ {
+ if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
+ tx_stop(info);
+ return;
+ }
+ info->pending_bh |= BH_TRANSMIT;
+ }
+ }
+}
+
+static void isr_gpio(struct slgt_info *info, unsigned int changed, unsigned int state)
+{
+ struct cond_wait *w, *prev;
+
+ /* wake processes waiting for specific transitions */
+ for (w = info->gpio_wait_q, prev = NULL ; w != NULL ; w = w->next) {
+ if (w->data & changed) {
+ w->data = state;
+ wake_up_interruptible(&w->q);
+ if (prev != NULL)
+ prev->next = w->next;
+ else
+ info->gpio_wait_q = w->next;
+ } else
+ prev = w;
+ }
+}
+
+/* interrupt service routine
+ *
+ * irq interrupt number
+ * dev_id device ID supplied during interrupt registration
+ */
+static irqreturn_t slgt_interrupt(int dummy, void *dev_id)
+{
+ struct slgt_info *info = dev_id;
+ unsigned int gsr;
+ unsigned int i;
+
+ DBGISR(("slgt_interrupt irq=%d entry\n", info->irq_level));
+
+ while((gsr = rd_reg32(info, GSR) & 0xffffff00)) {
+ DBGISR(("%s gsr=%08x\n", info->device_name, gsr));
+ info->irq_occurred = true;
+ for(i=0; i < info->port_count ; i++) {
+ if (info->port_array[i] == NULL)
+ continue;
+ spin_lock(&info->port_array[i]->lock);
+ if (gsr & (BIT8 << i))
+ isr_serial(info->port_array[i]);
+ if (gsr & (BIT16 << (i*2)))
+ isr_rdma(info->port_array[i]);
+ if (gsr & (BIT17 << (i*2)))
+ isr_tdma(info->port_array[i]);
+ spin_unlock(&info->port_array[i]->lock);
+ }
+ }
+
+ if (info->gpio_present) {
+ unsigned int state;
+ unsigned int changed;
+ spin_lock(&info->lock);
+ while ((changed = rd_reg32(info, IOSR)) != 0) {
+ DBGISR(("%s iosr=%08x\n", info->device_name, changed));
+ /* read latched state of GPIO signals */
+ state = rd_reg32(info, IOVR);
+ /* clear pending GPIO interrupt bits */
+ wr_reg32(info, IOSR, changed);
+ for (i=0 ; i < info->port_count ; i++) {
+ if (info->port_array[i] != NULL)
+ isr_gpio(info->port_array[i], changed, state);
+ }
+ }
+ spin_unlock(&info->lock);
+ }
+
+ for(i=0; i < info->port_count ; i++) {
+ struct slgt_info *port = info->port_array[i];
+ if (port == NULL)
+ continue;
+ spin_lock(&port->lock);
+ if ((port->port.count || port->netcount) &&
+ port->pending_bh && !port->bh_running &&
+ !port->bh_requested) {
+ DBGISR(("%s bh queued\n", port->device_name));
+ schedule_work(&port->task);
+ port->bh_requested = true;
+ }
+ spin_unlock(&port->lock);
+ }
+
+ DBGISR(("slgt_interrupt irq=%d exit\n", info->irq_level));
+ return IRQ_HANDLED;
+}
+
+static int startup(struct slgt_info *info)
+{
+ DBGINFO(("%s startup\n", info->device_name));
+
+ if (info->port.flags & ASYNC_INITIALIZED)
+ return 0;
+
+ if (!info->tx_buf) {
+ info->tx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
+ if (!info->tx_buf) {
+ DBGERR(("%s can't allocate tx buffer\n", info->device_name));
+ return -ENOMEM;
+ }
+ }
+
+ info->pending_bh = 0;
+
+ memset(&info->icount, 0, sizeof(info->icount));
+
+ /* program hardware for current parameters */
+ change_params(info);
+
+ if (info->port.tty)
+ clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
+
+ info->port.flags |= ASYNC_INITIALIZED;
+
+ return 0;
+}
+
+/*
+ * called by close() and hangup() to shutdown hardware
+ */
+static void shutdown(struct slgt_info *info)
+{
+ unsigned long flags;
+
+ if (!(info->port.flags & ASYNC_INITIALIZED))
+ return;
+
+ DBGINFO(("%s shutdown\n", info->device_name));
+
+ /* clear status wait queue because status changes */
+ /* can't happen after shutting down the hardware */
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+
+ del_timer_sync(&info->tx_timer);
+ del_timer_sync(&info->rx_timer);
+
+ kfree(info->tx_buf);
+ info->tx_buf = NULL;
+
+ spin_lock_irqsave(&info->lock,flags);
+
+ tx_stop(info);
+ rx_stop(info);
+
+ slgt_irq_off(info, IRQ_ALL | IRQ_MASTER);
+
+ if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) {
+ info->signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
+ set_signals(info);
+ }
+
+ flush_cond_wait(&info->gpio_wait_q);
+
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ if (info->port.tty)
+ set_bit(TTY_IO_ERROR, &info->port.tty->flags);
+
+ info->port.flags &= ~ASYNC_INITIALIZED;
+}
+
+static void program_hw(struct slgt_info *info)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+
+ rx_stop(info);
+ tx_stop(info);
+
+ if (info->params.mode != MGSL_MODE_ASYNC ||
+ info->netcount)
+ sync_mode(info);
+ else
+ async_mode(info);
+
+ set_signals(info);
+
+ info->dcd_chkcount = 0;
+ info->cts_chkcount = 0;
+ info->ri_chkcount = 0;
+ info->dsr_chkcount = 0;
+
+ slgt_irq_on(info, IRQ_DCD | IRQ_CTS | IRQ_DSR | IRQ_RI);
+ get_signals(info);
+
+ if (info->netcount ||
+ (info->port.tty && info->port.tty->termios->c_cflag & CREAD))
+ rx_start(info);
+
+ spin_unlock_irqrestore(&info->lock,flags);
+}
+
+/*
+ * reconfigure adapter based on new parameters
+ */
+static void change_params(struct slgt_info *info)
+{
+ unsigned cflag;
+ int bits_per_char;
+
+ if (!info->port.tty || !info->port.tty->termios)
+ return;
+ DBGINFO(("%s change_params\n", info->device_name));
+
+ cflag = info->port.tty->termios->c_cflag;
+
+ /* if B0 rate (hangup) specified then negate DTR and RTS */
+ /* otherwise assert DTR and RTS */
+ if (cflag & CBAUD)
+ info->signals |= SerialSignal_RTS + SerialSignal_DTR;
+ else
+ info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+
+ /* byte size and parity */
+
+ switch (cflag & CSIZE) {
+ case CS5: info->params.data_bits = 5; break;
+ case CS6: info->params.data_bits = 6; break;
+ case CS7: info->params.data_bits = 7; break;
+ case CS8: info->params.data_bits = 8; break;
+ default: info->params.data_bits = 7; break;
+ }
+
+ info->params.stop_bits = (cflag & CSTOPB) ? 2 : 1;
+
+ if (cflag & PARENB)
+ info->params.parity = (cflag & PARODD) ? ASYNC_PARITY_ODD : ASYNC_PARITY_EVEN;
+ else
+ info->params.parity = ASYNC_PARITY_NONE;
+
+ /* calculate number of jiffies to transmit a full
+ * FIFO (32 bytes) at specified data rate
+ */
+ bits_per_char = info->params.data_bits +
+ info->params.stop_bits + 1;
+
+ info->params.data_rate = tty_get_baud_rate(info->port.tty);
+
+ if (info->params.data_rate) {
+ info->timeout = (32*HZ*bits_per_char) /
+ info->params.data_rate;
+ }
+ info->timeout += HZ/50; /* Add .02 seconds of slop */
+
+ if (cflag & CRTSCTS)
+ info->port.flags |= ASYNC_CTS_FLOW;
+ else
+ info->port.flags &= ~ASYNC_CTS_FLOW;
+
+ if (cflag & CLOCAL)
+ info->port.flags &= ~ASYNC_CHECK_CD;
+ else
+ info->port.flags |= ASYNC_CHECK_CD;
+
+ /* process tty input control flags */
+
+ info->read_status_mask = IRQ_RXOVER;
+ if (I_INPCK(info->port.tty))
+ info->read_status_mask |= MASK_PARITY | MASK_FRAMING;
+ if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
+ info->read_status_mask |= MASK_BREAK;
+ if (I_IGNPAR(info->port.tty))
+ info->ignore_status_mask |= MASK_PARITY | MASK_FRAMING;
+ if (I_IGNBRK(info->port.tty)) {
+ info->ignore_status_mask |= MASK_BREAK;
+ /* If ignoring parity and break indicators, ignore
+ * overruns too. (For real raw support).
+ */
+ if (I_IGNPAR(info->port.tty))
+ info->ignore_status_mask |= MASK_OVERRUN;
+ }
+
+ program_hw(info);
+}
+
+static int get_stats(struct slgt_info *info, struct mgsl_icount __user *user_icount)
+{
+ DBGINFO(("%s get_stats\n", info->device_name));
+ if (!user_icount) {
+ memset(&info->icount, 0, sizeof(info->icount));
+ } else {
+ if (copy_to_user(user_icount, &info->icount, sizeof(struct mgsl_icount)))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static int get_params(struct slgt_info *info, MGSL_PARAMS __user *user_params)
+{
+ DBGINFO(("%s get_params\n", info->device_name));
+ if (copy_to_user(user_params, &info->params, sizeof(MGSL_PARAMS)))
+ return -EFAULT;
+ return 0;
+}
+
+static int set_params(struct slgt_info *info, MGSL_PARAMS __user *new_params)
+{
+ unsigned long flags;
+ MGSL_PARAMS tmp_params;
+
+ DBGINFO(("%s set_params\n", info->device_name));
+ if (copy_from_user(&tmp_params, new_params, sizeof(MGSL_PARAMS)))
+ return -EFAULT;
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (tmp_params.mode == MGSL_MODE_BASE_CLOCK)
+ info->base_clock = tmp_params.clock_speed;
+ else
+ memcpy(&info->params, &tmp_params, sizeof(MGSL_PARAMS));
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ program_hw(info);
+
+ return 0;
+}
+
+static int get_txidle(struct slgt_info *info, int __user *idle_mode)
+{
+ DBGINFO(("%s get_txidle=%d\n", info->device_name, info->idle_mode));
+ if (put_user(info->idle_mode, idle_mode))
+ return -EFAULT;
+ return 0;
+}
+
+static int set_txidle(struct slgt_info *info, int idle_mode)
+{
+ unsigned long flags;
+ DBGINFO(("%s set_txidle(%d)\n", info->device_name, idle_mode));
+ spin_lock_irqsave(&info->lock,flags);
+ info->idle_mode = idle_mode;
+ if (info->params.mode != MGSL_MODE_ASYNC)
+ tx_set_idle(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ return 0;
+}
+
+static int tx_enable(struct slgt_info *info, int enable)
+{
+ unsigned long flags;
+ DBGINFO(("%s tx_enable(%d)\n", info->device_name, enable));
+ spin_lock_irqsave(&info->lock,flags);
+ if (enable) {
+ if (!info->tx_enabled)
+ tx_start(info);
+ } else {
+ if (info->tx_enabled)
+ tx_stop(info);
+ }
+ spin_unlock_irqrestore(&info->lock,flags);
+ return 0;
+}
+
+/*
+ * abort transmit HDLC frame
+ */
+static int tx_abort(struct slgt_info *info)
+{
+ unsigned long flags;
+ DBGINFO(("%s tx_abort\n", info->device_name));
+ spin_lock_irqsave(&info->lock,flags);
+ tdma_reset(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ return 0;
+}
+
+static int rx_enable(struct slgt_info *info, int enable)
+{
+ unsigned long flags;
+ unsigned int rbuf_fill_level;
+ DBGINFO(("%s rx_enable(%08x)\n", info->device_name, enable));
+ spin_lock_irqsave(&info->lock,flags);
+ /*
+ * enable[31..16] = receive DMA buffer fill level
+ * 0 = noop (leave fill level unchanged)
+ * fill level must be multiple of 4 and <= buffer size
+ */
+ rbuf_fill_level = ((unsigned int)enable) >> 16;
+ if (rbuf_fill_level) {
+ if ((rbuf_fill_level > DMABUFSIZE) || (rbuf_fill_level % 4)) {
+ spin_unlock_irqrestore(&info->lock, flags);
+ return -EINVAL;
+ }
+ info->rbuf_fill_level = rbuf_fill_level;
+ if (rbuf_fill_level < 128)
+ info->rx_pio = 1; /* PIO mode */
+ else
+ info->rx_pio = 0; /* DMA mode */
+ rx_stop(info); /* restart receiver to use new fill level */
+ }
+
+ /*
+ * enable[1..0] = receiver enable command
+ * 0 = disable
+ * 1 = enable
+ * 2 = enable or force hunt mode if already enabled
+ */
+ enable &= 3;
+ if (enable) {
+ if (!info->rx_enabled)
+ rx_start(info);
+ else if (enable == 2) {
+ /* force hunt mode (write 1 to RCR[3]) */
+ wr_reg16(info, RCR, rd_reg16(info, RCR) | BIT3);
+ }
+ } else {
+ if (info->rx_enabled)
+ rx_stop(info);
+ }
+ spin_unlock_irqrestore(&info->lock,flags);
+ return 0;
+}
+
+/*
+ * wait for specified event to occur
+ */
+static int wait_mgsl_event(struct slgt_info *info, int __user *mask_ptr)
+{
+ unsigned long flags;
+ int s;
+ int rc=0;
+ struct mgsl_icount cprev, cnow;
+ int events;
+ int mask;
+ struct _input_signal_events oldsigs, newsigs;
+ DECLARE_WAITQUEUE(wait, current);
+
+ if (get_user(mask, mask_ptr))
+ return -EFAULT;
+
+ DBGINFO(("%s wait_mgsl_event(%d)\n", info->device_name, mask));
+
+ spin_lock_irqsave(&info->lock,flags);
+
+ /* return immediately if state matches requested events */
+ get_signals(info);
+ s = info->signals;
+
+ events = mask &
+ ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
+ ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
+ ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
+ ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
+ if (events) {
+ spin_unlock_irqrestore(&info->lock,flags);
+ goto exit;
+ }
+
+ /* save current irq counts */
+ cprev = info->icount;
+ oldsigs = info->input_signal_events;
+
+ /* enable hunt and idle irqs if needed */
+ if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) {
+ unsigned short val = rd_reg16(info, SCR);
+ if (!(val & IRQ_RXIDLE))
+ wr_reg16(info, SCR, (unsigned short)(val | IRQ_RXIDLE));
+ }
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&info->event_wait_q, &wait);
+
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ for(;;) {
+ schedule();
+ if (signal_pending(current)) {
+ rc = -ERESTARTSYS;
+ break;
+ }
+
+ /* get current irq counts */
+ spin_lock_irqsave(&info->lock,flags);
+ cnow = info->icount;
+ newsigs = info->input_signal_events;
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ /* if no change, wait aborted for some reason */
+ if (newsigs.dsr_up == oldsigs.dsr_up &&
+ newsigs.dsr_down == oldsigs.dsr_down &&
+ newsigs.dcd_up == oldsigs.dcd_up &&
+ newsigs.dcd_down == oldsigs.dcd_down &&
+ newsigs.cts_up == oldsigs.cts_up &&
+ newsigs.cts_down == oldsigs.cts_down &&
+ newsigs.ri_up == oldsigs.ri_up &&
+ newsigs.ri_down == oldsigs.ri_down &&
+ cnow.exithunt == cprev.exithunt &&
+ cnow.rxidle == cprev.rxidle) {
+ rc = -EIO;
+ break;
+ }
+
+ events = mask &
+ ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
+ (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
+ (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
+ (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
+ (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
+ (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
+ (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
+ (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
+ (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
+ (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
+ if (events)
+ break;
+
+ cprev = cnow;
+ oldsigs = newsigs;
+ }
+
+ remove_wait_queue(&info->event_wait_q, &wait);
+ set_current_state(TASK_RUNNING);
+
+
+ if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
+ spin_lock_irqsave(&info->lock,flags);
+ if (!waitqueue_active(&info->event_wait_q)) {
+ /* disable enable exit hunt mode/idle rcvd IRQs */
+ wr_reg16(info, SCR,
+ (unsigned short)(rd_reg16(info, SCR) & ~IRQ_RXIDLE));
+ }
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+exit:
+ if (rc == 0)
+ rc = put_user(events, mask_ptr);
+ return rc;
+}
+
+static int get_interface(struct slgt_info *info, int __user *if_mode)
+{
+ DBGINFO(("%s get_interface=%x\n", info->device_name, info->if_mode));
+ if (put_user(info->if_mode, if_mode))
+ return -EFAULT;
+ return 0;
+}
+
+static int set_interface(struct slgt_info *info, int if_mode)
+{
+ unsigned long flags;
+ unsigned short val;
+
+ DBGINFO(("%s set_interface=%x)\n", info->device_name, if_mode));
+ spin_lock_irqsave(&info->lock,flags);
+ info->if_mode = if_mode;
+
+ msc_set_vcr(info);
+
+ /* TCR (tx control) 07 1=RTS driver control */
+ val = rd_reg16(info, TCR);
+ if (info->if_mode & MGSL_INTERFACE_RTS_EN)
+ val |= BIT7;
+ else
+ val &= ~BIT7;
+ wr_reg16(info, TCR, val);
+
+ spin_unlock_irqrestore(&info->lock,flags);
+ return 0;
+}
+
+static int get_xsync(struct slgt_info *info, int __user *xsync)
+{
+ DBGINFO(("%s get_xsync=%x\n", info->device_name, info->xsync));
+ if (put_user(info->xsync, xsync))
+ return -EFAULT;
+ return 0;
+}
+
+/*
+ * set extended sync pattern (1 to 4 bytes) for extended sync mode
+ *
+ * sync pattern is contained in least significant bytes of value
+ * most significant byte of sync pattern is oldest (1st sent/detected)
+ */
+static int set_xsync(struct slgt_info *info, int xsync)
+{
+ unsigned long flags;
+
+ DBGINFO(("%s set_xsync=%x)\n", info->device_name, xsync));
+ spin_lock_irqsave(&info->lock, flags);
+ info->xsync = xsync;
+ wr_reg32(info, XSR, xsync);
+ spin_unlock_irqrestore(&info->lock, flags);
+ return 0;
+}
+
+static int get_xctrl(struct slgt_info *info, int __user *xctrl)
+{
+ DBGINFO(("%s get_xctrl=%x\n", info->device_name, info->xctrl));
+ if (put_user(info->xctrl, xctrl))
+ return -EFAULT;
+ return 0;
+}
+
+/*
+ * set extended control options
+ *
+ * xctrl[31:19] reserved, must be zero
+ * xctrl[18:17] extended sync pattern length in bytes
+ * 00 = 1 byte in xsr[7:0]
+ * 01 = 2 bytes in xsr[15:0]
+ * 10 = 3 bytes in xsr[23:0]
+ * 11 = 4 bytes in xsr[31:0]
+ * xctrl[16] 1 = enable terminal count, 0=disabled
+ * xctrl[15:0] receive terminal count for fixed length packets
+ * value is count minus one (0 = 1 byte packet)
+ * when terminal count is reached, receiver
+ * automatically returns to hunt mode and receive
+ * FIFO contents are flushed to DMA buffers with
+ * end of frame (EOF) status
+ */
+static int set_xctrl(struct slgt_info *info, int xctrl)
+{
+ unsigned long flags;
+
+ DBGINFO(("%s set_xctrl=%x)\n", info->device_name, xctrl));
+ spin_lock_irqsave(&info->lock, flags);
+ info->xctrl = xctrl;
+ wr_reg32(info, XCR, xctrl);
+ spin_unlock_irqrestore(&info->lock, flags);
+ return 0;
+}
+
+/*
+ * set general purpose IO pin state and direction
+ *
+ * user_gpio fields:
+ * state each bit indicates a pin state
+ * smask set bit indicates pin state to set
+ * dir each bit indicates a pin direction (0=input, 1=output)
+ * dmask set bit indicates pin direction to set
+ */
+static int set_gpio(struct slgt_info *info, struct gpio_desc __user *user_gpio)
+{
+ unsigned long flags;
+ struct gpio_desc gpio;
+ __u32 data;
+
+ if (!info->gpio_present)
+ return -EINVAL;
+ if (copy_from_user(&gpio, user_gpio, sizeof(gpio)))
+ return -EFAULT;
+ DBGINFO(("%s set_gpio state=%08x smask=%08x dir=%08x dmask=%08x\n",
+ info->device_name, gpio.state, gpio.smask,
+ gpio.dir, gpio.dmask));
+
+ spin_lock_irqsave(&info->port_array[0]->lock, flags);
+ if (gpio.dmask) {
+ data = rd_reg32(info, IODR);
+ data |= gpio.dmask & gpio.dir;
+ data &= ~(gpio.dmask & ~gpio.dir);
+ wr_reg32(info, IODR, data);
+ }
+ if (gpio.smask) {
+ data = rd_reg32(info, IOVR);
+ data |= gpio.smask & gpio.state;
+ data &= ~(gpio.smask & ~gpio.state);
+ wr_reg32(info, IOVR, data);
+ }
+ spin_unlock_irqrestore(&info->port_array[0]->lock, flags);
+
+ return 0;
+}
+
+/*
+ * get general purpose IO pin state and direction
+ */
+static int get_gpio(struct slgt_info *info, struct gpio_desc __user *user_gpio)
+{
+ struct gpio_desc gpio;
+ if (!info->gpio_present)
+ return -EINVAL;
+ gpio.state = rd_reg32(info, IOVR);
+ gpio.smask = 0xffffffff;
+ gpio.dir = rd_reg32(info, IODR);
+ gpio.dmask = 0xffffffff;
+ if (copy_to_user(user_gpio, &gpio, sizeof(gpio)))
+ return -EFAULT;
+ DBGINFO(("%s get_gpio state=%08x dir=%08x\n",
+ info->device_name, gpio.state, gpio.dir));
+ return 0;
+}
+
+/*
+ * conditional wait facility
+ */
+static void init_cond_wait(struct cond_wait *w, unsigned int data)
+{
+ init_waitqueue_head(&w->q);
+ init_waitqueue_entry(&w->wait, current);
+ w->data = data;
+}
+
+static void add_cond_wait(struct cond_wait **head, struct cond_wait *w)
+{
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&w->q, &w->wait);
+ w->next = *head;
+ *head = w;
+}
+
+static void remove_cond_wait(struct cond_wait **head, struct cond_wait *cw)
+{
+ struct cond_wait *w, *prev;
+ remove_wait_queue(&cw->q, &cw->wait);
+ set_current_state(TASK_RUNNING);
+ for (w = *head, prev = NULL ; w != NULL ; prev = w, w = w->next) {
+ if (w == cw) {
+ if (prev != NULL)
+ prev->next = w->next;
+ else
+ *head = w->next;
+ break;
+ }
+ }
+}
+
+static void flush_cond_wait(struct cond_wait **head)
+{
+ while (*head != NULL) {
+ wake_up_interruptible(&(*head)->q);
+ *head = (*head)->next;
+ }
+}
+
+/*
+ * wait for general purpose I/O pin(s) to enter specified state
+ *
+ * user_gpio fields:
+ * state - bit indicates target pin state
+ * smask - set bit indicates watched pin
+ *
+ * The wait ends when at least one watched pin enters the specified
+ * state. When 0 (no error) is returned, user_gpio->state is set to the
+ * state of all GPIO pins when the wait ends.
+ *
+ * Note: Each pin may be a dedicated input, dedicated output, or
+ * configurable input/output. The number and configuration of pins
+ * varies with the specific adapter model. Only input pins (dedicated
+ * or configured) can be monitored with this function.
+ */
+static int wait_gpio(struct slgt_info *info, struct gpio_desc __user *user_gpio)
+{
+ unsigned long flags;
+ int rc = 0;
+ struct gpio_desc gpio;
+ struct cond_wait wait;
+ u32 state;
+
+ if (!info->gpio_present)
+ return -EINVAL;
+ if (copy_from_user(&gpio, user_gpio, sizeof(gpio)))
+ return -EFAULT;
+ DBGINFO(("%s wait_gpio() state=%08x smask=%08x\n",
+ info->device_name, gpio.state, gpio.smask));
+ /* ignore output pins identified by set IODR bit */
+ if ((gpio.smask &= ~rd_reg32(info, IODR)) == 0)
+ return -EINVAL;
+ init_cond_wait(&wait, gpio.smask);
+
+ spin_lock_irqsave(&info->port_array[0]->lock, flags);
+ /* enable interrupts for watched pins */
+ wr_reg32(info, IOER, rd_reg32(info, IOER) | gpio.smask);
+ /* get current pin states */
+ state = rd_reg32(info, IOVR);
+
+ if (gpio.smask & ~(state ^ gpio.state)) {
+ /* already in target state */
+ gpio.state = state;
+ } else {
+ /* wait for target state */
+ add_cond_wait(&info->gpio_wait_q, &wait);
+ spin_unlock_irqrestore(&info->port_array[0]->lock, flags);
+ schedule();
+ if (signal_pending(current))
+ rc = -ERESTARTSYS;
+ else
+ gpio.state = wait.data;
+ spin_lock_irqsave(&info->port_array[0]->lock, flags);
+ remove_cond_wait(&info->gpio_wait_q, &wait);
+ }
+
+ /* disable all GPIO interrupts if no waiting processes */
+ if (info->gpio_wait_q == NULL)
+ wr_reg32(info, IOER, 0);
+ spin_unlock_irqrestore(&info->port_array[0]->lock, flags);
+
+ if ((rc == 0) && copy_to_user(user_gpio, &gpio, sizeof(gpio)))
+ rc = -EFAULT;
+ return rc;
+}
+
+static int modem_input_wait(struct slgt_info *info,int arg)
+{
+ unsigned long flags;
+ int rc;
+ struct mgsl_icount cprev, cnow;
+ DECLARE_WAITQUEUE(wait, current);
+
+ /* save current irq counts */
+ spin_lock_irqsave(&info->lock,flags);
+ cprev = info->icount;
+ add_wait_queue(&info->status_event_wait_q, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ for(;;) {
+ schedule();
+ if (signal_pending(current)) {
+ rc = -ERESTARTSYS;
+ break;
+ }
+
+ /* get new irq counts */
+ spin_lock_irqsave(&info->lock,flags);
+ cnow = info->icount;
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ /* if no change, wait aborted for some reason */
+ if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
+ cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
+ rc = -EIO;
+ break;
+ }
+
+ /* check for change in caller specified modem input */
+ if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
+ (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
+ (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
+ (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
+ rc = 0;
+ break;
+ }
+
+ cprev = cnow;
+ }
+ remove_wait_queue(&info->status_event_wait_q, &wait);
+ set_current_state(TASK_RUNNING);
+ return rc;
+}
+
+/*
+ * return state of serial control and status signals
+ */
+static int tiocmget(struct tty_struct *tty)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned int result;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ result = ((info->signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
+ ((info->signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
+ ((info->signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
+ ((info->signals & SerialSignal_RI) ? TIOCM_RNG:0) +
+ ((info->signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
+ ((info->signals & SerialSignal_CTS) ? TIOCM_CTS:0);
+
+ DBGINFO(("%s tiocmget value=%08X\n", info->device_name, result));
+ return result;
+}
+
+/*
+ * set modem control signals (DTR/RTS)
+ *
+ * cmd signal command: TIOCMBIS = set bit TIOCMBIC = clear bit
+ * TIOCMSET = set/clear signal values
+ * value bit mask for command
+ */
+static int tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct slgt_info *info = tty->driver_data;
+ unsigned long flags;
+
+ DBGINFO(("%s tiocmset(%x,%x)\n", info->device_name, set, clear));
+
+ if (set & TIOCM_RTS)
+ info->signals |= SerialSignal_RTS;
+ if (set & TIOCM_DTR)
+ info->signals |= SerialSignal_DTR;
+ if (clear & TIOCM_RTS)
+ info->signals &= ~SerialSignal_RTS;
+ if (clear & TIOCM_DTR)
+ info->signals &= ~SerialSignal_DTR;
+
+ spin_lock_irqsave(&info->lock,flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ return 0;
+}
+
+static int carrier_raised(struct tty_port *port)
+{
+ unsigned long flags;
+ struct slgt_info *info = container_of(port, struct slgt_info, port);
+
+ spin_lock_irqsave(&info->lock,flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ return (info->signals & SerialSignal_DCD) ? 1 : 0;
+}
+
+static void dtr_rts(struct tty_port *port, int on)
+{
+ unsigned long flags;
+ struct slgt_info *info = container_of(port, struct slgt_info, port);
+
+ spin_lock_irqsave(&info->lock,flags);
+ if (on)
+ info->signals |= SerialSignal_RTS + SerialSignal_DTR;
+ else
+ info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+}
+
+
+/*
+ * block current process until the device is ready to open
+ */
+static int block_til_ready(struct tty_struct *tty, struct file *filp,
+ struct slgt_info *info)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ int retval;
+ bool do_clocal = false;
+ bool extra_count = false;
+ unsigned long flags;
+ int cd;
+ struct tty_port *port = &info->port;
+
+ DBGINFO(("%s block_til_ready\n", tty->driver->name));
+
+ if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
+ /* nonblock mode is set or port is not enabled */
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+ }
+
+ if (tty->termios->c_cflag & CLOCAL)
+ do_clocal = true;
+
+ /* Wait for carrier detect and the line to become
+ * free (i.e., not in use by the callout). While we are in
+ * this loop, port->count is dropped by one, so that
+ * close() knows when to free things. We restore it upon
+ * exit, either normal or abnormal.
+ */
+
+ retval = 0;
+ add_wait_queue(&port->open_wait, &wait);
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (!tty_hung_up_p(filp)) {
+ extra_count = true;
+ port->count--;
+ }
+ spin_unlock_irqrestore(&info->lock, flags);
+ port->blocked_open++;
+
+ while (1) {
+ if ((tty->termios->c_cflag & CBAUD))
+ tty_port_raise_dtr_rts(port);
+
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
+ retval = (port->flags & ASYNC_HUP_NOTIFY) ?
+ -EAGAIN : -ERESTARTSYS;
+ break;
+ }
+
+ cd = tty_port_carrier_raised(port);
+
+ if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd ))
+ break;
+
+ if (signal_pending(current)) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+
+ DBGINFO(("%s block_til_ready wait\n", tty->driver->name));
+ tty_unlock();
+ schedule();
+ tty_lock();
+ }
+
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&port->open_wait, &wait);
+
+ if (extra_count)
+ port->count++;
+ port->blocked_open--;
+
+ if (!retval)
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+
+ DBGINFO(("%s block_til_ready ready, rc=%d\n", tty->driver->name, retval));
+ return retval;
+}
+
+static int alloc_tmp_rbuf(struct slgt_info *info)
+{
+ info->tmp_rbuf = kmalloc(info->max_frame_size + 5, GFP_KERNEL);
+ if (info->tmp_rbuf == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+static void free_tmp_rbuf(struct slgt_info *info)
+{
+ kfree(info->tmp_rbuf);
+ info->tmp_rbuf = NULL;
+}
+
+/*
+ * allocate DMA descriptor lists.
+ */
+static int alloc_desc(struct slgt_info *info)
+{
+ unsigned int i;
+ unsigned int pbufs;
+
+ /* allocate memory to hold descriptor lists */
+ info->bufs = pci_alloc_consistent(info->pdev, DESC_LIST_SIZE, &info->bufs_dma_addr);
+ if (info->bufs == NULL)
+ return -ENOMEM;
+
+ memset(info->bufs, 0, DESC_LIST_SIZE);
+
+ info->rbufs = (struct slgt_desc*)info->bufs;
+ info->tbufs = ((struct slgt_desc*)info->bufs) + info->rbuf_count;
+
+ pbufs = (unsigned int)info->bufs_dma_addr;
+
+ /*
+ * Build circular lists of descriptors
+ */
+
+ for (i=0; i < info->rbuf_count; i++) {
+ /* physical address of this descriptor */
+ info->rbufs[i].pdesc = pbufs + (i * sizeof(struct slgt_desc));
+
+ /* physical address of next descriptor */
+ if (i == info->rbuf_count - 1)
+ info->rbufs[i].next = cpu_to_le32(pbufs);
+ else
+ info->rbufs[i].next = cpu_to_le32(pbufs + ((i+1) * sizeof(struct slgt_desc)));
+ set_desc_count(info->rbufs[i], DMABUFSIZE);
+ }
+
+ for (i=0; i < info->tbuf_count; i++) {
+ /* physical address of this descriptor */
+ info->tbufs[i].pdesc = pbufs + ((info->rbuf_count + i) * sizeof(struct slgt_desc));
+
+ /* physical address of next descriptor */
+ if (i == info->tbuf_count - 1)
+ info->tbufs[i].next = cpu_to_le32(pbufs + info->rbuf_count * sizeof(struct slgt_desc));
+ else
+ info->tbufs[i].next = cpu_to_le32(pbufs + ((info->rbuf_count + i + 1) * sizeof(struct slgt_desc)));
+ }
+
+ return 0;
+}
+
+static void free_desc(struct slgt_info *info)
+{
+ if (info->bufs != NULL) {
+ pci_free_consistent(info->pdev, DESC_LIST_SIZE, info->bufs, info->bufs_dma_addr);
+ info->bufs = NULL;
+ info->rbufs = NULL;
+ info->tbufs = NULL;
+ }
+}
+
+static int alloc_bufs(struct slgt_info *info, struct slgt_desc *bufs, int count)
+{
+ int i;
+ for (i=0; i < count; i++) {
+ if ((bufs[i].buf = pci_alloc_consistent(info->pdev, DMABUFSIZE, &bufs[i].buf_dma_addr)) == NULL)
+ return -ENOMEM;
+ bufs[i].pbuf = cpu_to_le32((unsigned int)bufs[i].buf_dma_addr);
+ }
+ return 0;
+}
+
+static void free_bufs(struct slgt_info *info, struct slgt_desc *bufs, int count)
+{
+ int i;
+ for (i=0; i < count; i++) {
+ if (bufs[i].buf == NULL)
+ continue;
+ pci_free_consistent(info->pdev, DMABUFSIZE, bufs[i].buf, bufs[i].buf_dma_addr);
+ bufs[i].buf = NULL;
+ }
+}
+
+static int alloc_dma_bufs(struct slgt_info *info)
+{
+ info->rbuf_count = 32;
+ info->tbuf_count = 32;
+
+ if (alloc_desc(info) < 0 ||
+ alloc_bufs(info, info->rbufs, info->rbuf_count) < 0 ||
+ alloc_bufs(info, info->tbufs, info->tbuf_count) < 0 ||
+ alloc_tmp_rbuf(info) < 0) {
+ DBGERR(("%s DMA buffer alloc fail\n", info->device_name));
+ return -ENOMEM;
+ }
+ reset_rbufs(info);
+ return 0;
+}
+
+static void free_dma_bufs(struct slgt_info *info)
+{
+ if (info->bufs) {
+ free_bufs(info, info->rbufs, info->rbuf_count);
+ free_bufs(info, info->tbufs, info->tbuf_count);
+ free_desc(info);
+ }
+ free_tmp_rbuf(info);
+}
+
+static int claim_resources(struct slgt_info *info)
+{
+ if (request_mem_region(info->phys_reg_addr, SLGT_REG_SIZE, "synclink_gt") == NULL) {
+ DBGERR(("%s reg addr conflict, addr=%08X\n",
+ info->device_name, info->phys_reg_addr));
+ info->init_error = DiagStatus_AddressConflict;
+ goto errout;
+ }
+ else
+ info->reg_addr_requested = true;
+
+ info->reg_addr = ioremap_nocache(info->phys_reg_addr, SLGT_REG_SIZE);
+ if (!info->reg_addr) {
+ DBGERR(("%s cant map device registers, addr=%08X\n",
+ info->device_name, info->phys_reg_addr));
+ info->init_error = DiagStatus_CantAssignPciResources;
+ goto errout;
+ }
+ return 0;
+
+errout:
+ release_resources(info);
+ return -ENODEV;
+}
+
+static void release_resources(struct slgt_info *info)
+{
+ if (info->irq_requested) {
+ free_irq(info->irq_level, info);
+ info->irq_requested = false;
+ }
+
+ if (info->reg_addr_requested) {
+ release_mem_region(info->phys_reg_addr, SLGT_REG_SIZE);
+ info->reg_addr_requested = false;
+ }
+
+ if (info->reg_addr) {
+ iounmap(info->reg_addr);
+ info->reg_addr = NULL;
+ }
+}
+
+/* Add the specified device instance data structure to the
+ * global linked list of devices and increment the device count.
+ */
+static void add_device(struct slgt_info *info)
+{
+ char *devstr;
+
+ info->next_device = NULL;
+ info->line = slgt_device_count;
+ sprintf(info->device_name, "%s%d", tty_dev_prefix, info->line);
+
+ if (info->line < MAX_DEVICES) {
+ if (maxframe[info->line])
+ info->max_frame_size = maxframe[info->line];
+ }
+
+ slgt_device_count++;
+
+ if (!slgt_device_list)
+ slgt_device_list = info;
+ else {
+ struct slgt_info *current_dev = slgt_device_list;
+ while(current_dev->next_device)
+ current_dev = current_dev->next_device;
+ current_dev->next_device = info;
+ }
+
+ if (info->max_frame_size < 4096)
+ info->max_frame_size = 4096;
+ else if (info->max_frame_size > 65535)
+ info->max_frame_size = 65535;
+
+ switch(info->pdev->device) {
+ case SYNCLINK_GT_DEVICE_ID:
+ devstr = "GT";
+ break;
+ case SYNCLINK_GT2_DEVICE_ID:
+ devstr = "GT2";
+ break;
+ case SYNCLINK_GT4_DEVICE_ID:
+ devstr = "GT4";
+ break;
+ case SYNCLINK_AC_DEVICE_ID:
+ devstr = "AC";
+ info->params.mode = MGSL_MODE_ASYNC;
+ break;
+ default:
+ devstr = "(unknown model)";
+ }
+ printk("SyncLink %s %s IO=%08x IRQ=%d MaxFrameSize=%u\n",
+ devstr, info->device_name, info->phys_reg_addr,
+ info->irq_level, info->max_frame_size);
+
+#if SYNCLINK_GENERIC_HDLC
+ hdlcdev_init(info);
+#endif
+}
+
+static const struct tty_port_operations slgt_port_ops = {
+ .carrier_raised = carrier_raised,
+ .dtr_rts = dtr_rts,
+};
+
+/*
+ * allocate device instance structure, return NULL on failure
+ */
+static struct slgt_info *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev)
+{
+ struct slgt_info *info;
+
+ info = kzalloc(sizeof(struct slgt_info), GFP_KERNEL);
+
+ if (!info) {
+ DBGERR(("%s device alloc failed adapter=%d port=%d\n",
+ driver_name, adapter_num, port_num));
+ } else {
+ tty_port_init(&info->port);
+ info->port.ops = &slgt_port_ops;
+ info->magic = MGSL_MAGIC;
+ INIT_WORK(&info->task, bh_handler);
+ info->max_frame_size = 4096;
+ info->base_clock = 14745600;
+ info->rbuf_fill_level = DMABUFSIZE;
+ info->port.close_delay = 5*HZ/10;
+ info->port.closing_wait = 30*HZ;
+ init_waitqueue_head(&info->status_event_wait_q);
+ init_waitqueue_head(&info->event_wait_q);
+ spin_lock_init(&info->netlock);
+ memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
+ info->idle_mode = HDLC_TXIDLE_FLAGS;
+ info->adapter_num = adapter_num;
+ info->port_num = port_num;
+
+ setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info);
+ setup_timer(&info->rx_timer, rx_timeout, (unsigned long)info);
+
+ /* Copy configuration info to device instance data */
+ info->pdev = pdev;
+ info->irq_level = pdev->irq;
+ info->phys_reg_addr = pci_resource_start(pdev,0);
+
+ info->bus_type = MGSL_BUS_TYPE_PCI;
+ info->irq_flags = IRQF_SHARED;
+
+ info->init_error = -1; /* assume error, set to 0 on successful init */
+ }
+
+ return info;
+}
+
+static void device_init(int adapter_num, struct pci_dev *pdev)
+{
+ struct slgt_info *port_array[SLGT_MAX_PORTS];
+ int i;
+ int port_count = 1;
+
+ if (pdev->device == SYNCLINK_GT2_DEVICE_ID)
+ port_count = 2;
+ else if (pdev->device == SYNCLINK_GT4_DEVICE_ID)
+ port_count = 4;
+
+ /* allocate device instances for all ports */
+ for (i=0; i < port_count; ++i) {
+ port_array[i] = alloc_dev(adapter_num, i, pdev);
+ if (port_array[i] == NULL) {
+ for (--i; i >= 0; --i)
+ kfree(port_array[i]);
+ return;
+ }
+ }
+
+ /* give copy of port_array to all ports and add to device list */
+ for (i=0; i < port_count; ++i) {
+ memcpy(port_array[i]->port_array, port_array, sizeof(port_array));
+ add_device(port_array[i]);
+ port_array[i]->port_count = port_count;
+ spin_lock_init(&port_array[i]->lock);
+ }
+
+ /* Allocate and claim adapter resources */
+ if (!claim_resources(port_array[0])) {
+
+ alloc_dma_bufs(port_array[0]);
+
+ /* copy resource information from first port to others */
+ for (i = 1; i < port_count; ++i) {
+ port_array[i]->irq_level = port_array[0]->irq_level;
+ port_array[i]->reg_addr = port_array[0]->reg_addr;
+ alloc_dma_bufs(port_array[i]);
+ }
+
+ if (request_irq(port_array[0]->irq_level,
+ slgt_interrupt,
+ port_array[0]->irq_flags,
+ port_array[0]->device_name,
+ port_array[0]) < 0) {
+ DBGERR(("%s request_irq failed IRQ=%d\n",
+ port_array[0]->device_name,
+ port_array[0]->irq_level));
+ } else {
+ port_array[0]->irq_requested = true;
+ adapter_test(port_array[0]);
+ for (i=1 ; i < port_count ; i++) {
+ port_array[i]->init_error = port_array[0]->init_error;
+ port_array[i]->gpio_present = port_array[0]->gpio_present;
+ }
+ }
+ }
+
+ for (i=0; i < port_count; ++i)
+ tty_register_device(serial_driver, port_array[i]->line, &(port_array[i]->pdev->dev));
+}
+
+static int __devinit init_one(struct pci_dev *dev,
+ const struct pci_device_id *ent)
+{
+ if (pci_enable_device(dev)) {
+ printk("error enabling pci device %p\n", dev);
+ return -EIO;
+ }
+ pci_set_master(dev);
+ device_init(slgt_device_count, dev);
+ return 0;
+}
+
+static void __devexit remove_one(struct pci_dev *dev)
+{
+}
+
+static const struct tty_operations ops = {
+ .open = open,
+ .close = close,
+ .write = write,
+ .put_char = put_char,
+ .flush_chars = flush_chars,
+ .write_room = write_room,
+ .chars_in_buffer = chars_in_buffer,
+ .flush_buffer = flush_buffer,
+ .ioctl = ioctl,
+ .compat_ioctl = slgt_compat_ioctl,
+ .throttle = throttle,
+ .unthrottle = unthrottle,
+ .send_xchar = send_xchar,
+ .break_ctl = set_break,
+ .wait_until_sent = wait_until_sent,
+ .set_termios = set_termios,
+ .stop = tx_hold,
+ .start = tx_release,
+ .hangup = hangup,
+ .tiocmget = tiocmget,
+ .tiocmset = tiocmset,
+ .get_icount = get_icount,
+ .proc_fops = &synclink_gt_proc_fops,
+};
+
+static void slgt_cleanup(void)
+{
+ int rc;
+ struct slgt_info *info;
+ struct slgt_info *tmp;
+
+ printk(KERN_INFO "unload %s\n", driver_name);
+
+ if (serial_driver) {
+ for (info=slgt_device_list ; info != NULL ; info=info->next_device)
+ tty_unregister_device(serial_driver, info->line);
+ if ((rc = tty_unregister_driver(serial_driver)))
+ DBGERR(("tty_unregister_driver error=%d\n", rc));
+ put_tty_driver(serial_driver);
+ }
+
+ /* reset devices */
+ info = slgt_device_list;
+ while(info) {
+ reset_port(info);
+ info = info->next_device;
+ }
+
+ /* release devices */
+ info = slgt_device_list;
+ while(info) {
+#if SYNCLINK_GENERIC_HDLC
+ hdlcdev_exit(info);
+#endif
+ free_dma_bufs(info);
+ free_tmp_rbuf(info);
+ if (info->port_num == 0)
+ release_resources(info);
+ tmp = info;
+ info = info->next_device;
+ kfree(tmp);
+ }
+
+ if (pci_registered)
+ pci_unregister_driver(&pci_driver);
+}
+
+/*
+ * Driver initialization entry point.
+ */
+static int __init slgt_init(void)
+{
+ int rc;
+
+ printk(KERN_INFO "%s\n", driver_name);
+
+ serial_driver = alloc_tty_driver(MAX_DEVICES);
+ if (!serial_driver) {
+ printk("%s can't allocate tty driver\n", driver_name);
+ return -ENOMEM;
+ }
+
+ /* Initialize the tty_driver structure */
+
+ serial_driver->owner = THIS_MODULE;
+ serial_driver->driver_name = tty_driver_name;
+ serial_driver->name = tty_dev_prefix;
+ serial_driver->major = ttymajor;
+ serial_driver->minor_start = 64;
+ serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ serial_driver->subtype = SERIAL_TYPE_NORMAL;
+ serial_driver->init_termios = tty_std_termios;
+ serial_driver->init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ serial_driver->init_termios.c_ispeed = 9600;
+ serial_driver->init_termios.c_ospeed = 9600;
+ serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+ tty_set_operations(serial_driver, &ops);
+ if ((rc = tty_register_driver(serial_driver)) < 0) {
+ DBGERR(("%s can't register serial driver\n", driver_name));
+ put_tty_driver(serial_driver);
+ serial_driver = NULL;
+ goto error;
+ }
+
+ printk(KERN_INFO "%s, tty major#%d\n",
+ driver_name, serial_driver->major);
+
+ slgt_device_count = 0;
+ if ((rc = pci_register_driver(&pci_driver)) < 0) {
+ printk("%s pci_register_driver error=%d\n", driver_name, rc);
+ goto error;
+ }
+ pci_registered = true;
+
+ if (!slgt_device_list)
+ printk("%s no devices found\n",driver_name);
+
+ return 0;
+
+error:
+ slgt_cleanup();
+ return rc;
+}
+
+static void __exit slgt_exit(void)
+{
+ slgt_cleanup();
+}
+
+module_init(slgt_init);
+module_exit(slgt_exit);
+
+/*
+ * register access routines
+ */
+
+#define CALC_REGADDR() \
+ unsigned long reg_addr = ((unsigned long)info->reg_addr) + addr; \
+ if (addr >= 0x80) \
+ reg_addr += (info->port_num) * 32; \
+ else if (addr >= 0x40) \
+ reg_addr += (info->port_num) * 16;
+
+static __u8 rd_reg8(struct slgt_info *info, unsigned int addr)
+{
+ CALC_REGADDR();
+ return readb((void __iomem *)reg_addr);
+}
+
+static void wr_reg8(struct slgt_info *info, unsigned int addr, __u8 value)
+{
+ CALC_REGADDR();
+ writeb(value, (void __iomem *)reg_addr);
+}
+
+static __u16 rd_reg16(struct slgt_info *info, unsigned int addr)
+{
+ CALC_REGADDR();
+ return readw((void __iomem *)reg_addr);
+}
+
+static void wr_reg16(struct slgt_info *info, unsigned int addr, __u16 value)
+{
+ CALC_REGADDR();
+ writew(value, (void __iomem *)reg_addr);
+}
+
+static __u32 rd_reg32(struct slgt_info *info, unsigned int addr)
+{
+ CALC_REGADDR();
+ return readl((void __iomem *)reg_addr);
+}
+
+static void wr_reg32(struct slgt_info *info, unsigned int addr, __u32 value)
+{
+ CALC_REGADDR();
+ writel(value, (void __iomem *)reg_addr);
+}
+
+static void rdma_reset(struct slgt_info *info)
+{
+ unsigned int i;
+
+ /* set reset bit */
+ wr_reg32(info, RDCSR, BIT1);
+
+ /* wait for enable bit cleared */
+ for(i=0 ; i < 1000 ; i++)
+ if (!(rd_reg32(info, RDCSR) & BIT0))
+ break;
+}
+
+static void tdma_reset(struct slgt_info *info)
+{
+ unsigned int i;
+
+ /* set reset bit */
+ wr_reg32(info, TDCSR, BIT1);
+
+ /* wait for enable bit cleared */
+ for(i=0 ; i < 1000 ; i++)
+ if (!(rd_reg32(info, TDCSR) & BIT0))
+ break;
+}
+
+/*
+ * enable internal loopback
+ * TxCLK and RxCLK are generated from BRG
+ * and TxD is looped back to RxD internally.
+ */
+static void enable_loopback(struct slgt_info *info)
+{
+ /* SCR (serial control) BIT2=looopback enable */
+ wr_reg16(info, SCR, (unsigned short)(rd_reg16(info, SCR) | BIT2));
+
+ if (info->params.mode != MGSL_MODE_ASYNC) {
+ /* CCR (clock control)
+ * 07..05 tx clock source (010 = BRG)
+ * 04..02 rx clock source (010 = BRG)
+ * 01 auxclk enable (0 = disable)
+ * 00 BRG enable (1 = enable)
+ *
+ * 0100 1001
+ */
+ wr_reg8(info, CCR, 0x49);
+
+ /* set speed if available, otherwise use default */
+ if (info->params.clock_speed)
+ set_rate(info, info->params.clock_speed);
+ else
+ set_rate(info, 3686400);
+ }
+}
+
+/*
+ * set baud rate generator to specified rate
+ */
+static void set_rate(struct slgt_info *info, u32 rate)
+{
+ unsigned int div;
+ unsigned int osc = info->base_clock;
+
+ /* div = osc/rate - 1
+ *
+ * Round div up if osc/rate is not integer to
+ * force to next slowest rate.
+ */
+
+ if (rate) {
+ div = osc/rate;
+ if (!(osc % rate) && div)
+ div--;
+ wr_reg16(info, BDR, (unsigned short)div);
+ }
+}
+
+static void rx_stop(struct slgt_info *info)
+{
+ unsigned short val;
+
+ /* disable and reset receiver */
+ val = rd_reg16(info, RCR) & ~BIT1; /* clear enable bit */
+ wr_reg16(info, RCR, (unsigned short)(val | BIT2)); /* set reset bit */
+ wr_reg16(info, RCR, val); /* clear reset bit */
+
+ slgt_irq_off(info, IRQ_RXOVER + IRQ_RXDATA + IRQ_RXIDLE);
+
+ /* clear pending rx interrupts */
+ wr_reg16(info, SSR, IRQ_RXIDLE + IRQ_RXOVER);
+
+ rdma_reset(info);
+
+ info->rx_enabled = false;
+ info->rx_restart = false;
+}
+
+static void rx_start(struct slgt_info *info)
+{
+ unsigned short val;
+
+ slgt_irq_off(info, IRQ_RXOVER + IRQ_RXDATA);
+
+ /* clear pending rx overrun IRQ */
+ wr_reg16(info, SSR, IRQ_RXOVER);
+
+ /* reset and disable receiver */
+ val = rd_reg16(info, RCR) & ~BIT1; /* clear enable bit */
+ wr_reg16(info, RCR, (unsigned short)(val | BIT2)); /* set reset bit */
+ wr_reg16(info, RCR, val); /* clear reset bit */
+
+ rdma_reset(info);
+ reset_rbufs(info);
+
+ if (info->rx_pio) {
+ /* rx request when rx FIFO not empty */
+ wr_reg16(info, SCR, (unsigned short)(rd_reg16(info, SCR) & ~BIT14));
+ slgt_irq_on(info, IRQ_RXDATA);
+ if (info->params.mode == MGSL_MODE_ASYNC) {
+ /* enable saving of rx status */
+ wr_reg32(info, RDCSR, BIT6);
+ }
+ } else {
+ /* rx request when rx FIFO half full */
+ wr_reg16(info, SCR, (unsigned short)(rd_reg16(info, SCR) | BIT14));
+ /* set 1st descriptor address */
+ wr_reg32(info, RDDAR, info->rbufs[0].pdesc);
+
+ if (info->params.mode != MGSL_MODE_ASYNC) {
+ /* enable rx DMA and DMA interrupt */
+ wr_reg32(info, RDCSR, (BIT2 + BIT0));
+ } else {
+ /* enable saving of rx status, rx DMA and DMA interrupt */
+ wr_reg32(info, RDCSR, (BIT6 + BIT2 + BIT0));
+ }
+ }
+
+ slgt_irq_on(info, IRQ_RXOVER);
+
+ /* enable receiver */
+ wr_reg16(info, RCR, (unsigned short)(rd_reg16(info, RCR) | BIT1));
+
+ info->rx_restart = false;
+ info->rx_enabled = true;
+}
+
+static void tx_start(struct slgt_info *info)
+{
+ if (!info->tx_enabled) {
+ wr_reg16(info, TCR,
+ (unsigned short)((rd_reg16(info, TCR) | BIT1) & ~BIT2));
+ info->tx_enabled = true;
+ }
+
+ if (desc_count(info->tbufs[info->tbuf_start])) {
+ info->drop_rts_on_tx_done = false;
+
+ if (info->params.mode != MGSL_MODE_ASYNC) {
+ if (info->params.flags & HDLC_FLAG_AUTO_RTS) {
+ get_signals(info);
+ if (!(info->signals & SerialSignal_RTS)) {
+ info->signals |= SerialSignal_RTS;
+ set_signals(info);
+ info->drop_rts_on_tx_done = true;
+ }
+ }
+
+ slgt_irq_off(info, IRQ_TXDATA);
+ slgt_irq_on(info, IRQ_TXUNDER + IRQ_TXIDLE);
+ /* clear tx idle and underrun status bits */
+ wr_reg16(info, SSR, (unsigned short)(IRQ_TXIDLE + IRQ_TXUNDER));
+ } else {
+ slgt_irq_off(info, IRQ_TXDATA);
+ slgt_irq_on(info, IRQ_TXIDLE);
+ /* clear tx idle status bit */
+ wr_reg16(info, SSR, IRQ_TXIDLE);
+ }
+ /* set 1st descriptor address and start DMA */
+ wr_reg32(info, TDDAR, info->tbufs[info->tbuf_start].pdesc);
+ wr_reg32(info, TDCSR, BIT2 + BIT0);
+ info->tx_active = true;
+ }
+}
+
+static void tx_stop(struct slgt_info *info)
+{
+ unsigned short val;
+
+ del_timer(&info->tx_timer);
+
+ tdma_reset(info);
+
+ /* reset and disable transmitter */
+ val = rd_reg16(info, TCR) & ~BIT1; /* clear enable bit */
+ wr_reg16(info, TCR, (unsigned short)(val | BIT2)); /* set reset bit */
+
+ slgt_irq_off(info, IRQ_TXDATA + IRQ_TXIDLE + IRQ_TXUNDER);
+
+ /* clear tx idle and underrun status bit */
+ wr_reg16(info, SSR, (unsigned short)(IRQ_TXIDLE + IRQ_TXUNDER));
+
+ reset_tbufs(info);
+
+ info->tx_enabled = false;
+ info->tx_active = false;
+}
+
+static void reset_port(struct slgt_info *info)
+{
+ if (!info->reg_addr)
+ return;
+
+ tx_stop(info);
+ rx_stop(info);
+
+ info->signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
+ set_signals(info);
+
+ slgt_irq_off(info, IRQ_ALL | IRQ_MASTER);
+}
+
+static void reset_adapter(struct slgt_info *info)
+{
+ int i;
+ for (i=0; i < info->port_count; ++i) {
+ if (info->port_array[i])
+ reset_port(info->port_array[i]);
+ }
+}
+
+static void async_mode(struct slgt_info *info)
+{
+ unsigned short val;
+
+ slgt_irq_off(info, IRQ_ALL | IRQ_MASTER);
+ tx_stop(info);
+ rx_stop(info);
+
+ /* TCR (tx control)
+ *
+ * 15..13 mode, 010=async
+ * 12..10 encoding, 000=NRZ
+ * 09 parity enable
+ * 08 1=odd parity, 0=even parity
+ * 07 1=RTS driver control
+ * 06 1=break enable
+ * 05..04 character length
+ * 00=5 bits
+ * 01=6 bits
+ * 10=7 bits
+ * 11=8 bits
+ * 03 0=1 stop bit, 1=2 stop bits
+ * 02 reset
+ * 01 enable
+ * 00 auto-CTS enable
+ */
+ val = 0x4000;
+
+ if (info->if_mode & MGSL_INTERFACE_RTS_EN)
+ val |= BIT7;
+
+ if (info->params.parity != ASYNC_PARITY_NONE) {
+ val |= BIT9;
+ if (info->params.parity == ASYNC_PARITY_ODD)
+ val |= BIT8;
+ }
+
+ switch (info->params.data_bits)
+ {
+ case 6: val |= BIT4; break;
+ case 7: val |= BIT5; break;
+ case 8: val |= BIT5 + BIT4; break;
+ }
+
+ if (info->params.stop_bits != 1)
+ val |= BIT3;
+
+ if (info->params.flags & HDLC_FLAG_AUTO_CTS)
+ val |= BIT0;
+
+ wr_reg16(info, TCR, val);
+
+ /* RCR (rx control)
+ *
+ * 15..13 mode, 010=async
+ * 12..10 encoding, 000=NRZ
+ * 09 parity enable
+ * 08 1=odd parity, 0=even parity
+ * 07..06 reserved, must be 0
+ * 05..04 character length
+ * 00=5 bits
+ * 01=6 bits
+ * 10=7 bits
+ * 11=8 bits
+ * 03 reserved, must be zero
+ * 02 reset
+ * 01 enable
+ * 00 auto-DCD enable
+ */
+ val = 0x4000;
+
+ if (info->params.parity != ASYNC_PARITY_NONE) {
+ val |= BIT9;
+ if (info->params.parity == ASYNC_PARITY_ODD)
+ val |= BIT8;
+ }
+
+ switch (info->params.data_bits)
+ {
+ case 6: val |= BIT4; break;
+ case 7: val |= BIT5; break;
+ case 8: val |= BIT5 + BIT4; break;
+ }
+
+ if (info->params.flags & HDLC_FLAG_AUTO_DCD)
+ val |= BIT0;
+
+ wr_reg16(info, RCR, val);
+
+ /* CCR (clock control)
+ *
+ * 07..05 011 = tx clock source is BRG/16
+ * 04..02 010 = rx clock source is BRG
+ * 01 0 = auxclk disabled
+ * 00 1 = BRG enabled
+ *
+ * 0110 1001
+ */
+ wr_reg8(info, CCR, 0x69);
+
+ msc_set_vcr(info);
+
+ /* SCR (serial control)
+ *
+ * 15 1=tx req on FIFO half empty
+ * 14 1=rx req on FIFO half full
+ * 13 tx data IRQ enable
+ * 12 tx idle IRQ enable
+ * 11 rx break on IRQ enable
+ * 10 rx data IRQ enable
+ * 09 rx break off IRQ enable
+ * 08 overrun IRQ enable
+ * 07 DSR IRQ enable
+ * 06 CTS IRQ enable
+ * 05 DCD IRQ enable
+ * 04 RI IRQ enable
+ * 03 0=16x sampling, 1=8x sampling
+ * 02 1=txd->rxd internal loopback enable
+ * 01 reserved, must be zero
+ * 00 1=master IRQ enable
+ */
+ val = BIT15 + BIT14 + BIT0;
+ /* JCR[8] : 1 = x8 async mode feature available */
+ if ((rd_reg32(info, JCR) & BIT8) && info->params.data_rate &&
+ ((info->base_clock < (info->params.data_rate * 16)) ||
+ (info->base_clock % (info->params.data_rate * 16)))) {
+ /* use 8x sampling */
+ val |= BIT3;
+ set_rate(info, info->params.data_rate * 8);
+ } else {
+ /* use 16x sampling */
+ set_rate(info, info->params.data_rate * 16);
+ }
+ wr_reg16(info, SCR, val);
+
+ slgt_irq_on(info, IRQ_RXBREAK | IRQ_RXOVER);
+
+ if (info->params.loopback)
+ enable_loopback(info);
+}
+
+static void sync_mode(struct slgt_info *info)
+{
+ unsigned short val;
+
+ slgt_irq_off(info, IRQ_ALL | IRQ_MASTER);
+ tx_stop(info);
+ rx_stop(info);
+
+ /* TCR (tx control)
+ *
+ * 15..13 mode
+ * 000=HDLC/SDLC
+ * 001=raw bit synchronous
+ * 010=asynchronous/isochronous
+ * 011=monosync byte synchronous
+ * 100=bisync byte synchronous
+ * 101=xsync byte synchronous
+ * 12..10 encoding
+ * 09 CRC enable
+ * 08 CRC32
+ * 07 1=RTS driver control
+ * 06 preamble enable
+ * 05..04 preamble length
+ * 03 share open/close flag
+ * 02 reset
+ * 01 enable
+ * 00 auto-CTS enable
+ */
+ val = BIT2;
+
+ switch(info->params.mode) {
+ case MGSL_MODE_XSYNC:
+ val |= BIT15 + BIT13;
+ break;
+ case MGSL_MODE_MONOSYNC: val |= BIT14 + BIT13; break;
+ case MGSL_MODE_BISYNC: val |= BIT15; break;
+ case MGSL_MODE_RAW: val |= BIT13; break;
+ }
+ if (info->if_mode & MGSL_INTERFACE_RTS_EN)
+ val |= BIT7;
+
+ switch(info->params.encoding)
+ {
+ case HDLC_ENCODING_NRZB: val |= BIT10; break;
+ case HDLC_ENCODING_NRZI_MARK: val |= BIT11; break;
+ case HDLC_ENCODING_NRZI: val |= BIT11 + BIT10; break;
+ case HDLC_ENCODING_BIPHASE_MARK: val |= BIT12; break;
+ case HDLC_ENCODING_BIPHASE_SPACE: val |= BIT12 + BIT10; break;
+ case HDLC_ENCODING_BIPHASE_LEVEL: val |= BIT12 + BIT11; break;
+ case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: val |= BIT12 + BIT11 + BIT10; break;
+ }
+
+ switch (info->params.crc_type & HDLC_CRC_MASK)
+ {
+ case HDLC_CRC_16_CCITT: val |= BIT9; break;
+ case HDLC_CRC_32_CCITT: val |= BIT9 + BIT8; break;
+ }
+
+ if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE)
+ val |= BIT6;
+
+ switch (info->params.preamble_length)
+ {
+ case HDLC_PREAMBLE_LENGTH_16BITS: val |= BIT5; break;
+ case HDLC_PREAMBLE_LENGTH_32BITS: val |= BIT4; break;
+ case HDLC_PREAMBLE_LENGTH_64BITS: val |= BIT5 + BIT4; break;
+ }
+
+ if (info->params.flags & HDLC_FLAG_AUTO_CTS)
+ val |= BIT0;
+
+ wr_reg16(info, TCR, val);
+
+ /* TPR (transmit preamble) */
+
+ switch (info->params.preamble)
+ {
+ case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break;
+ case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break;
+ case HDLC_PREAMBLE_PATTERN_ZEROS: val = 0x00; break;
+ case HDLC_PREAMBLE_PATTERN_10: val = 0x55; break;
+ case HDLC_PREAMBLE_PATTERN_01: val = 0xaa; break;
+ default: val = 0x7e; break;
+ }
+ wr_reg8(info, TPR, (unsigned char)val);
+
+ /* RCR (rx control)
+ *
+ * 15..13 mode
+ * 000=HDLC/SDLC
+ * 001=raw bit synchronous
+ * 010=asynchronous/isochronous
+ * 011=monosync byte synchronous
+ * 100=bisync byte synchronous
+ * 101=xsync byte synchronous
+ * 12..10 encoding
+ * 09 CRC enable
+ * 08 CRC32
+ * 07..03 reserved, must be 0
+ * 02 reset
+ * 01 enable
+ * 00 auto-DCD enable
+ */
+ val = 0;
+
+ switch(info->params.mode) {
+ case MGSL_MODE_XSYNC:
+ val |= BIT15 + BIT13;
+ break;
+ case MGSL_MODE_MONOSYNC: val |= BIT14 + BIT13; break;
+ case MGSL_MODE_BISYNC: val |= BIT15; break;
+ case MGSL_MODE_RAW: val |= BIT13; break;
+ }
+
+ switch(info->params.encoding)
+ {
+ case HDLC_ENCODING_NRZB: val |= BIT10; break;
+ case HDLC_ENCODING_NRZI_MARK: val |= BIT11; break;
+ case HDLC_ENCODING_NRZI: val |= BIT11 + BIT10; break;
+ case HDLC_ENCODING_BIPHASE_MARK: val |= BIT12; break;
+ case HDLC_ENCODING_BIPHASE_SPACE: val |= BIT12 + BIT10; break;
+ case HDLC_ENCODING_BIPHASE_LEVEL: val |= BIT12 + BIT11; break;
+ case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: val |= BIT12 + BIT11 + BIT10; break;
+ }
+
+ switch (info->params.crc_type & HDLC_CRC_MASK)
+ {
+ case HDLC_CRC_16_CCITT: val |= BIT9; break;
+ case HDLC_CRC_32_CCITT: val |= BIT9 + BIT8; break;
+ }
+
+ if (info->params.flags & HDLC_FLAG_AUTO_DCD)
+ val |= BIT0;
+
+ wr_reg16(info, RCR, val);
+
+ /* CCR (clock control)
+ *
+ * 07..05 tx clock source
+ * 04..02 rx clock source
+ * 01 auxclk enable
+ * 00 BRG enable
+ */
+ val = 0;
+
+ if (info->params.flags & HDLC_FLAG_TXC_BRG)
+ {
+ // when RxC source is DPLL, BRG generates 16X DPLL
+ // reference clock, so take TxC from BRG/16 to get
+ // transmit clock at actual data rate
+ if (info->params.flags & HDLC_FLAG_RXC_DPLL)
+ val |= BIT6 + BIT5; /* 011, txclk = BRG/16 */
+ else
+ val |= BIT6; /* 010, txclk = BRG */
+ }
+ else if (info->params.flags & HDLC_FLAG_TXC_DPLL)
+ val |= BIT7; /* 100, txclk = DPLL Input */
+ else if (info->params.flags & HDLC_FLAG_TXC_RXCPIN)
+ val |= BIT5; /* 001, txclk = RXC Input */
+
+ if (info->params.flags & HDLC_FLAG_RXC_BRG)
+ val |= BIT3; /* 010, rxclk = BRG */
+ else if (info->params.flags & HDLC_FLAG_RXC_DPLL)
+ val |= BIT4; /* 100, rxclk = DPLL */
+ else if (info->params.flags & HDLC_FLAG_RXC_TXCPIN)
+ val |= BIT2; /* 001, rxclk = TXC Input */
+
+ if (info->params.clock_speed)
+ val |= BIT1 + BIT0;
+
+ wr_reg8(info, CCR, (unsigned char)val);
+
+ if (info->params.flags & (HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL))
+ {
+ // program DPLL mode
+ switch(info->params.encoding)
+ {
+ case HDLC_ENCODING_BIPHASE_MARK:
+ case HDLC_ENCODING_BIPHASE_SPACE:
+ val = BIT7; break;
+ case HDLC_ENCODING_BIPHASE_LEVEL:
+ case HDLC_ENCODING_DIFF_BIPHASE_LEVEL:
+ val = BIT7 + BIT6; break;
+ default: val = BIT6; // NRZ encodings
+ }
+ wr_reg16(info, RCR, (unsigned short)(rd_reg16(info, RCR) | val));
+
+ // DPLL requires a 16X reference clock from BRG
+ set_rate(info, info->params.clock_speed * 16);
+ }
+ else
+ set_rate(info, info->params.clock_speed);
+
+ tx_set_idle(info);
+
+ msc_set_vcr(info);
+
+ /* SCR (serial control)
+ *
+ * 15 1=tx req on FIFO half empty
+ * 14 1=rx req on FIFO half full
+ * 13 tx data IRQ enable
+ * 12 tx idle IRQ enable
+ * 11 underrun IRQ enable
+ * 10 rx data IRQ enable
+ * 09 rx idle IRQ enable
+ * 08 overrun IRQ enable
+ * 07 DSR IRQ enable
+ * 06 CTS IRQ enable
+ * 05 DCD IRQ enable
+ * 04 RI IRQ enable
+ * 03 reserved, must be zero
+ * 02 1=txd->rxd internal loopback enable
+ * 01 reserved, must be zero
+ * 00 1=master IRQ enable
+ */
+ wr_reg16(info, SCR, BIT15 + BIT14 + BIT0);
+
+ if (info->params.loopback)
+ enable_loopback(info);
+}
+
+/*
+ * set transmit idle mode
+ */
+static void tx_set_idle(struct slgt_info *info)
+{
+ unsigned char val;
+ unsigned short tcr;
+
+ /* if preamble enabled (tcr[6] == 1) then tx idle size = 8 bits
+ * else tcr[5:4] = tx idle size: 00 = 8 bits, 01 = 16 bits
+ */
+ tcr = rd_reg16(info, TCR);
+ if (info->idle_mode & HDLC_TXIDLE_CUSTOM_16) {
+ /* disable preamble, set idle size to 16 bits */
+ tcr = (tcr & ~(BIT6 + BIT5)) | BIT4;
+ /* MSB of 16 bit idle specified in tx preamble register (TPR) */
+ wr_reg8(info, TPR, (unsigned char)((info->idle_mode >> 8) & 0xff));
+ } else if (!(tcr & BIT6)) {
+ /* preamble is disabled, set idle size to 8 bits */
+ tcr &= ~(BIT5 + BIT4);
+ }
+ wr_reg16(info, TCR, tcr);
+
+ if (info->idle_mode & (HDLC_TXIDLE_CUSTOM_8 | HDLC_TXIDLE_CUSTOM_16)) {
+ /* LSB of custom tx idle specified in tx idle register */
+ val = (unsigned char)(info->idle_mode & 0xff);
+ } else {
+ /* standard 8 bit idle patterns */
+ switch(info->idle_mode)
+ {
+ case HDLC_TXIDLE_FLAGS: val = 0x7e; break;
+ case HDLC_TXIDLE_ALT_ZEROS_ONES:
+ case HDLC_TXIDLE_ALT_MARK_SPACE: val = 0xaa; break;
+ case HDLC_TXIDLE_ZEROS:
+ case HDLC_TXIDLE_SPACE: val = 0x00; break;
+ default: val = 0xff;
+ }
+ }
+
+ wr_reg8(info, TIR, val);
+}
+
+/*
+ * get state of V24 status (input) signals
+ */
+static void get_signals(struct slgt_info *info)
+{
+ unsigned short status = rd_reg16(info, SSR);
+
+ /* clear all serial signals except DTR and RTS */
+ info->signals &= SerialSignal_DTR + SerialSignal_RTS;
+
+ if (status & BIT3)
+ info->signals |= SerialSignal_DSR;
+ if (status & BIT2)
+ info->signals |= SerialSignal_CTS;
+ if (status & BIT1)
+ info->signals |= SerialSignal_DCD;
+ if (status & BIT0)
+ info->signals |= SerialSignal_RI;
+}
+
+/*
+ * set V.24 Control Register based on current configuration
+ */
+static void msc_set_vcr(struct slgt_info *info)
+{
+ unsigned char val = 0;
+
+ /* VCR (V.24 control)
+ *
+ * 07..04 serial IF select
+ * 03 DTR
+ * 02 RTS
+ * 01 LL
+ * 00 RL
+ */
+
+ switch(info->if_mode & MGSL_INTERFACE_MASK)
+ {
+ case MGSL_INTERFACE_RS232:
+ val |= BIT5; /* 0010 */
+ break;
+ case MGSL_INTERFACE_V35:
+ val |= BIT7 + BIT6 + BIT5; /* 1110 */
+ break;
+ case MGSL_INTERFACE_RS422:
+ val |= BIT6; /* 0100 */
+ break;
+ }
+
+ if (info->if_mode & MGSL_INTERFACE_MSB_FIRST)
+ val |= BIT4;
+ if (info->signals & SerialSignal_DTR)
+ val |= BIT3;
+ if (info->signals & SerialSignal_RTS)
+ val |= BIT2;
+ if (info->if_mode & MGSL_INTERFACE_LL)
+ val |= BIT1;
+ if (info->if_mode & MGSL_INTERFACE_RL)
+ val |= BIT0;
+ wr_reg8(info, VCR, val);
+}
+
+/*
+ * set state of V24 control (output) signals
+ */
+static void set_signals(struct slgt_info *info)
+{
+ unsigned char val = rd_reg8(info, VCR);
+ if (info->signals & SerialSignal_DTR)
+ val |= BIT3;
+ else
+ val &= ~BIT3;
+ if (info->signals & SerialSignal_RTS)
+ val |= BIT2;
+ else
+ val &= ~BIT2;
+ wr_reg8(info, VCR, val);
+}
+
+/*
+ * free range of receive DMA buffers (i to last)
+ */
+static void free_rbufs(struct slgt_info *info, unsigned int i, unsigned int last)
+{
+ int done = 0;
+
+ while(!done) {
+ /* reset current buffer for reuse */
+ info->rbufs[i].status = 0;
+ set_desc_count(info->rbufs[i], info->rbuf_fill_level);
+ if (i == last)
+ done = 1;
+ if (++i == info->rbuf_count)
+ i = 0;
+ }
+ info->rbuf_current = i;
+}
+
+/*
+ * mark all receive DMA buffers as free
+ */
+static void reset_rbufs(struct slgt_info *info)
+{
+ free_rbufs(info, 0, info->rbuf_count - 1);
+ info->rbuf_fill_index = 0;
+ info->rbuf_fill_count = 0;
+}
+
+/*
+ * pass receive HDLC frame to upper layer
+ *
+ * return true if frame available, otherwise false
+ */
+static bool rx_get_frame(struct slgt_info *info)
+{
+ unsigned int start, end;
+ unsigned short status;
+ unsigned int framesize = 0;
+ unsigned long flags;
+ struct tty_struct *tty = info->port.tty;
+ unsigned char addr_field = 0xff;
+ unsigned int crc_size = 0;
+
+ switch (info->params.crc_type & HDLC_CRC_MASK) {
+ case HDLC_CRC_16_CCITT: crc_size = 2; break;
+ case HDLC_CRC_32_CCITT: crc_size = 4; break;
+ }
+
+check_again:
+
+ framesize = 0;
+ addr_field = 0xff;
+ start = end = info->rbuf_current;
+
+ for (;;) {
+ if (!desc_complete(info->rbufs[end]))
+ goto cleanup;
+
+ if (framesize == 0 && info->params.addr_filter != 0xff)
+ addr_field = info->rbufs[end].buf[0];
+
+ framesize += desc_count(info->rbufs[end]);
+
+ if (desc_eof(info->rbufs[end]))
+ break;
+
+ if (++end == info->rbuf_count)
+ end = 0;
+
+ if (end == info->rbuf_current) {
+ if (info->rx_enabled){
+ spin_lock_irqsave(&info->lock,flags);
+ rx_start(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+ goto cleanup;
+ }
+ }
+
+ /* status
+ *
+ * 15 buffer complete
+ * 14..06 reserved
+ * 05..04 residue
+ * 02 eof (end of frame)
+ * 01 CRC error
+ * 00 abort
+ */
+ status = desc_status(info->rbufs[end]);
+
+ /* ignore CRC bit if not using CRC (bit is undefined) */
+ if ((info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_NONE)
+ status &= ~BIT1;
+
+ if (framesize == 0 ||
+ (addr_field != 0xff && addr_field != info->params.addr_filter)) {
+ free_rbufs(info, start, end);
+ goto check_again;
+ }
+
+ if (framesize < (2 + crc_size) || status & BIT0) {
+ info->icount.rxshort++;
+ framesize = 0;
+ } else if (status & BIT1) {
+ info->icount.rxcrc++;
+ if (!(info->params.crc_type & HDLC_CRC_RETURN_EX))
+ framesize = 0;
+ }
+
+#if SYNCLINK_GENERIC_HDLC
+ if (framesize == 0) {
+ info->netdev->stats.rx_errors++;
+ info->netdev->stats.rx_frame_errors++;
+ }
+#endif
+
+ DBGBH(("%s rx frame status=%04X size=%d\n",
+ info->device_name, status, framesize));
+ DBGDATA(info, info->rbufs[start].buf, min_t(int, framesize, info->rbuf_fill_level), "rx");
+
+ if (framesize) {
+ if (!(info->params.crc_type & HDLC_CRC_RETURN_EX)) {
+ framesize -= crc_size;
+ crc_size = 0;
+ }
+
+ if (framesize > info->max_frame_size + crc_size)
+ info->icount.rxlong++;
+ else {
+ /* copy dma buffer(s) to contiguous temp buffer */
+ int copy_count = framesize;
+ int i = start;
+ unsigned char *p = info->tmp_rbuf;
+ info->tmp_rbuf_count = framesize;
+
+ info->icount.rxok++;
+
+ while(copy_count) {
+ int partial_count = min_t(int, copy_count, info->rbuf_fill_level);
+ memcpy(p, info->rbufs[i].buf, partial_count);
+ p += partial_count;
+ copy_count -= partial_count;
+ if (++i == info->rbuf_count)
+ i = 0;
+ }
+
+ if (info->params.crc_type & HDLC_CRC_RETURN_EX) {
+ *p = (status & BIT1) ? RX_CRC_ERROR : RX_OK;
+ framesize++;
+ }
+
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount)
+ hdlcdev_rx(info,info->tmp_rbuf, framesize);
+ else
+#endif
+ ldisc_receive_buf(tty, info->tmp_rbuf, info->flag_buf, framesize);
+ }
+ }
+ free_rbufs(info, start, end);
+ return true;
+
+cleanup:
+ return false;
+}
+
+/*
+ * pass receive buffer (RAW synchronous mode) to tty layer
+ * return true if buffer available, otherwise false
+ */
+static bool rx_get_buf(struct slgt_info *info)
+{
+ unsigned int i = info->rbuf_current;
+ unsigned int count;
+
+ if (!desc_complete(info->rbufs[i]))
+ return false;
+ count = desc_count(info->rbufs[i]);
+ switch(info->params.mode) {
+ case MGSL_MODE_MONOSYNC:
+ case MGSL_MODE_BISYNC:
+ case MGSL_MODE_XSYNC:
+ /* ignore residue in byte synchronous modes */
+ if (desc_residue(info->rbufs[i]))
+ count--;
+ break;
+ }
+ DBGDATA(info, info->rbufs[i].buf, count, "rx");
+ DBGINFO(("rx_get_buf size=%d\n", count));
+ if (count)
+ ldisc_receive_buf(info->port.tty, info->rbufs[i].buf,
+ info->flag_buf, count);
+ free_rbufs(info, i, i);
+ return true;
+}
+
+static void reset_tbufs(struct slgt_info *info)
+{
+ unsigned int i;
+ info->tbuf_current = 0;
+ for (i=0 ; i < info->tbuf_count ; i++) {
+ info->tbufs[i].status = 0;
+ info->tbufs[i].count = 0;
+ }
+}
+
+/*
+ * return number of free transmit DMA buffers
+ */
+static unsigned int free_tbuf_count(struct slgt_info *info)
+{
+ unsigned int count = 0;
+ unsigned int i = info->tbuf_current;
+
+ do
+ {
+ if (desc_count(info->tbufs[i]))
+ break; /* buffer in use */
+ ++count;
+ if (++i == info->tbuf_count)
+ i=0;
+ } while (i != info->tbuf_current);
+
+ /* if tx DMA active, last zero count buffer is in use */
+ if (count && (rd_reg32(info, TDCSR) & BIT0))
+ --count;
+
+ return count;
+}
+
+/*
+ * return number of bytes in unsent transmit DMA buffers
+ * and the serial controller tx FIFO
+ */
+static unsigned int tbuf_bytes(struct slgt_info *info)
+{
+ unsigned int total_count = 0;
+ unsigned int i = info->tbuf_current;
+ unsigned int reg_value;
+ unsigned int count;
+ unsigned int active_buf_count = 0;
+
+ /*
+ * Add descriptor counts for all tx DMA buffers.
+ * If count is zero (cleared by DMA controller after read),
+ * the buffer is complete or is actively being read from.
+ *
+ * Record buf_count of last buffer with zero count starting
+ * from current ring position. buf_count is mirror
+ * copy of count and is not cleared by serial controller.
+ * If DMA controller is active, that buffer is actively
+ * being read so add to total.
+ */
+ do {
+ count = desc_count(info->tbufs[i]);
+ if (count)
+ total_count += count;
+ else if (!total_count)
+ active_buf_count = info->tbufs[i].buf_count;
+ if (++i == info->tbuf_count)
+ i = 0;
+ } while (i != info->tbuf_current);
+
+ /* read tx DMA status register */
+ reg_value = rd_reg32(info, TDCSR);
+
+ /* if tx DMA active, last zero count buffer is in use */
+ if (reg_value & BIT0)
+ total_count += active_buf_count;
+
+ /* add tx FIFO count = reg_value[15..8] */
+ total_count += (reg_value >> 8) & 0xff;
+
+ /* if transmitter active add one byte for shift register */
+ if (info->tx_active)
+ total_count++;
+
+ return total_count;
+}
+
+/*
+ * load data into transmit DMA buffer ring and start transmitter if needed
+ * return true if data accepted, otherwise false (buffers full)
+ */
+static bool tx_load(struct slgt_info *info, const char *buf, unsigned int size)
+{
+ unsigned short count;
+ unsigned int i;
+ struct slgt_desc *d;
+
+ /* check required buffer space */
+ if (DIV_ROUND_UP(size, DMABUFSIZE) > free_tbuf_count(info))
+ return false;
+
+ DBGDATA(info, buf, size, "tx");
+
+ /*
+ * copy data to one or more DMA buffers in circular ring
+ * tbuf_start = first buffer for this data
+ * tbuf_current = next free buffer
+ *
+ * Copy all data before making data visible to DMA controller by
+ * setting descriptor count of the first buffer.
+ * This prevents an active DMA controller from reading the first DMA
+ * buffers of a frame and stopping before the final buffers are filled.
+ */
+
+ info->tbuf_start = i = info->tbuf_current;
+
+ while (size) {
+ d = &info->tbufs[i];
+
+ count = (unsigned short)((size > DMABUFSIZE) ? DMABUFSIZE : size);
+ memcpy(d->buf, buf, count);
+
+ size -= count;
+ buf += count;
+
+ /*
+ * set EOF bit for last buffer of HDLC frame or
+ * for every buffer in raw mode
+ */
+ if ((!size && info->params.mode == MGSL_MODE_HDLC) ||
+ info->params.mode == MGSL_MODE_RAW)
+ set_desc_eof(*d, 1);
+ else
+ set_desc_eof(*d, 0);
+
+ /* set descriptor count for all but first buffer */
+ if (i != info->tbuf_start)
+ set_desc_count(*d, count);
+ d->buf_count = count;
+
+ if (++i == info->tbuf_count)
+ i = 0;
+ }
+
+ info->tbuf_current = i;
+
+ /* set first buffer count to make new data visible to DMA controller */
+ d = &info->tbufs[info->tbuf_start];
+ set_desc_count(*d, d->buf_count);
+
+ /* start transmitter if needed and update transmit timeout */
+ if (!info->tx_active)
+ tx_start(info);
+ update_tx_timer(info);
+
+ return true;
+}
+
+static int register_test(struct slgt_info *info)
+{
+ static unsigned short patterns[] =
+ {0x0000, 0xffff, 0xaaaa, 0x5555, 0x6969, 0x9696};
+ static unsigned int count = ARRAY_SIZE(patterns);
+ unsigned int i;
+ int rc = 0;
+
+ for (i=0 ; i < count ; i++) {
+ wr_reg16(info, TIR, patterns[i]);
+ wr_reg16(info, BDR, patterns[(i+1)%count]);
+ if ((rd_reg16(info, TIR) != patterns[i]) ||
+ (rd_reg16(info, BDR) != patterns[(i+1)%count])) {
+ rc = -ENODEV;
+ break;
+ }
+ }
+ info->gpio_present = (rd_reg32(info, JCR) & BIT5) ? 1 : 0;
+ info->init_error = rc ? 0 : DiagStatus_AddressFailure;
+ return rc;
+}
+
+static int irq_test(struct slgt_info *info)
+{
+ unsigned long timeout;
+ unsigned long flags;
+ struct tty_struct *oldtty = info->port.tty;
+ u32 speed = info->params.data_rate;
+
+ info->params.data_rate = 921600;
+ info->port.tty = NULL;
+
+ spin_lock_irqsave(&info->lock, flags);
+ async_mode(info);
+ slgt_irq_on(info, IRQ_TXIDLE);
+
+ /* enable transmitter */
+ wr_reg16(info, TCR,
+ (unsigned short)(rd_reg16(info, TCR) | BIT1));
+
+ /* write one byte and wait for tx idle */
+ wr_reg16(info, TDR, 0);
+
+ /* assume failure */
+ info->init_error = DiagStatus_IrqFailure;
+ info->irq_occurred = false;
+
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ timeout=100;
+ while(timeout-- && !info->irq_occurred)
+ msleep_interruptible(10);
+
+ spin_lock_irqsave(&info->lock,flags);
+ reset_port(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ info->params.data_rate = speed;
+ info->port.tty = oldtty;
+
+ info->init_error = info->irq_occurred ? 0 : DiagStatus_IrqFailure;
+ return info->irq_occurred ? 0 : -ENODEV;
+}
+
+static int loopback_test_rx(struct slgt_info *info)
+{
+ unsigned char *src, *dest;
+ int count;
+
+ if (desc_complete(info->rbufs[0])) {
+ count = desc_count(info->rbufs[0]);
+ src = info->rbufs[0].buf;
+ dest = info->tmp_rbuf;
+
+ for( ; count ; count-=2, src+=2) {
+ /* src=data byte (src+1)=status byte */
+ if (!(*(src+1) & (BIT9 + BIT8))) {
+ *dest = *src;
+ dest++;
+ info->tmp_rbuf_count++;
+ }
+ }
+ DBGDATA(info, info->tmp_rbuf, info->tmp_rbuf_count, "rx");
+ return 1;
+ }
+ return 0;
+}
+
+static int loopback_test(struct slgt_info *info)
+{
+#define TESTFRAMESIZE 20
+
+ unsigned long timeout;
+ u16 count = TESTFRAMESIZE;
+ unsigned char buf[TESTFRAMESIZE];
+ int rc = -ENODEV;
+ unsigned long flags;
+
+ struct tty_struct *oldtty = info->port.tty;
+ MGSL_PARAMS params;
+
+ memcpy(¶ms, &info->params, sizeof(params));
+
+ info->params.mode = MGSL_MODE_ASYNC;
+ info->params.data_rate = 921600;
+ info->params.loopback = 1;
+ info->port.tty = NULL;
+
+ /* build and send transmit frame */
+ for (count = 0; count < TESTFRAMESIZE; ++count)
+ buf[count] = (unsigned char)count;
+
+ info->tmp_rbuf_count = 0;
+ memset(info->tmp_rbuf, 0, TESTFRAMESIZE);
+
+ /* program hardware for HDLC and enabled receiver */
+ spin_lock_irqsave(&info->lock,flags);
+ async_mode(info);
+ rx_start(info);
+ tx_load(info, buf, count);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ /* wait for receive complete */
+ for (timeout = 100; timeout; --timeout) {
+ msleep_interruptible(10);
+ if (loopback_test_rx(info)) {
+ rc = 0;
+ break;
+ }
+ }
+
+ /* verify received frame length and contents */
+ if (!rc && (info->tmp_rbuf_count != count ||
+ memcmp(buf, info->tmp_rbuf, count))) {
+ rc = -ENODEV;
+ }
+
+ spin_lock_irqsave(&info->lock,flags);
+ reset_adapter(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ memcpy(&info->params, ¶ms, sizeof(info->params));
+ info->port.tty = oldtty;
+
+ info->init_error = rc ? DiagStatus_DmaFailure : 0;
+ return rc;
+}
+
+static int adapter_test(struct slgt_info *info)
+{
+ DBGINFO(("testing %s\n", info->device_name));
+ if (register_test(info) < 0) {
+ printk("register test failure %s addr=%08X\n",
+ info->device_name, info->phys_reg_addr);
+ } else if (irq_test(info) < 0) {
+ printk("IRQ test failure %s IRQ=%d\n",
+ info->device_name, info->irq_level);
+ } else if (loopback_test(info) < 0) {
+ printk("loopback test failure %s\n", info->device_name);
+ }
+ return info->init_error;
+}
+
+/*
+ * transmit timeout handler
+ */
+static void tx_timeout(unsigned long context)
+{
+ struct slgt_info *info = (struct slgt_info*)context;
+ unsigned long flags;
+
+ DBGINFO(("%s tx_timeout\n", info->device_name));
+ if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) {
+ info->icount.txtimeout++;
+ }
+ spin_lock_irqsave(&info->lock,flags);
+ tx_stop(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount)
+ hdlcdev_tx_done(info);
+ else
+#endif
+ bh_transmit(info);
+}
+
+/*
+ * receive buffer polling timer
+ */
+static void rx_timeout(unsigned long context)
+{
+ struct slgt_info *info = (struct slgt_info*)context;
+ unsigned long flags;
+
+ DBGINFO(("%s rx_timeout\n", info->device_name));
+ spin_lock_irqsave(&info->lock, flags);
+ info->pending_bh |= BH_RECEIVE;
+ spin_unlock_irqrestore(&info->lock, flags);
+ bh_handler(&info->task);
+}
+
--- /dev/null
+/*
+ * $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $
+ *
+ * Device driver for Microgate SyncLink Multiport
+ * high speed multiprotocol serial adapter.
+ *
+ * written by Paul Fulghum for Microgate Corporation
+ * paulkf@microgate.com
+ *
+ * Microgate and SyncLink are trademarks of Microgate Corporation
+ *
+ * Derived from serial.c written by Theodore Ts'o and Linus Torvalds
+ * This code is released under the GNU General Public License (GPL)
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
+#if defined(__i386__)
+# define BREAKPOINT() asm(" int $3");
+#else
+# define BREAKPOINT() { }
+#endif
+
+#define MAX_DEVICES 12
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/ioctl.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/dma.h>
+#include <linux/bitops.h>
+#include <asm/types.h>
+#include <linux/termios.h>
+#include <linux/workqueue.h>
+#include <linux/hdlc.h>
+#include <linux/synclink.h>
+
+#if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINKMP_MODULE))
+#define SYNCLINK_GENERIC_HDLC 1
+#else
+#define SYNCLINK_GENERIC_HDLC 0
+#endif
+
+#define GET_USER(error,value,addr) error = get_user(value,addr)
+#define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
+#define PUT_USER(error,value,addr) error = put_user(value,addr)
+#define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
+
+#include <asm/uaccess.h>
+
+static MGSL_PARAMS default_params = {
+ MGSL_MODE_HDLC, /* unsigned long mode */
+ 0, /* unsigned char loopback; */
+ HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
+ HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
+ 0, /* unsigned long clock_speed; */
+ 0xff, /* unsigned char addr_filter; */
+ HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
+ HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
+ HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
+ 9600, /* unsigned long data_rate; */
+ 8, /* unsigned char data_bits; */
+ 1, /* unsigned char stop_bits; */
+ ASYNC_PARITY_NONE /* unsigned char parity; */
+};
+
+/* size in bytes of DMA data buffers */
+#define SCABUFSIZE 1024
+#define SCA_MEM_SIZE 0x40000
+#define SCA_BASE_SIZE 512
+#define SCA_REG_SIZE 16
+#define SCA_MAX_PORTS 4
+#define SCAMAXDESC 128
+
+#define BUFFERLISTSIZE 4096
+
+/* SCA-I style DMA buffer descriptor */
+typedef struct _SCADESC
+{
+ u16 next; /* lower l6 bits of next descriptor addr */
+ u16 buf_ptr; /* lower 16 bits of buffer addr */
+ u8 buf_base; /* upper 8 bits of buffer addr */
+ u8 pad1;
+ u16 length; /* length of buffer */
+ u8 status; /* status of buffer */
+ u8 pad2;
+} SCADESC, *PSCADESC;
+
+typedef struct _SCADESC_EX
+{
+ /* device driver bookkeeping section */
+ char *virt_addr; /* virtual address of data buffer */
+ u16 phys_entry; /* lower 16-bits of physical address of this descriptor */
+} SCADESC_EX, *PSCADESC_EX;
+
+/* The queue of BH actions to be performed */
+
+#define BH_RECEIVE 1
+#define BH_TRANSMIT 2
+#define BH_STATUS 4
+
+#define IO_PIN_SHUTDOWN_LIMIT 100
+
+struct _input_signal_events {
+ int ri_up;
+ int ri_down;
+ int dsr_up;
+ int dsr_down;
+ int dcd_up;
+ int dcd_down;
+ int cts_up;
+ int cts_down;
+};
+
+/*
+ * Device instance data structure
+ */
+typedef struct _synclinkmp_info {
+ void *if_ptr; /* General purpose pointer (used by SPPP) */
+ int magic;
+ struct tty_port port;
+ int line;
+ unsigned short close_delay;
+ unsigned short closing_wait; /* time to wait before closing */
+
+ struct mgsl_icount icount;
+
+ int timeout;
+ int x_char; /* xon/xoff character */
+ u16 read_status_mask1; /* break detection (SR1 indications) */
+ u16 read_status_mask2; /* parity/framing/overun (SR2 indications) */
+ unsigned char ignore_status_mask1; /* break detection (SR1 indications) */
+ unsigned char ignore_status_mask2; /* parity/framing/overun (SR2 indications) */
+ unsigned char *tx_buf;
+ int tx_put;
+ int tx_get;
+ int tx_count;
+
+ wait_queue_head_t status_event_wait_q;
+ wait_queue_head_t event_wait_q;
+ struct timer_list tx_timer; /* HDLC transmit timeout timer */
+ struct _synclinkmp_info *next_device; /* device list link */
+ struct timer_list status_timer; /* input signal status check timer */
+
+ spinlock_t lock; /* spinlock for synchronizing with ISR */
+ struct work_struct task; /* task structure for scheduling bh */
+
+ u32 max_frame_size; /* as set by device config */
+
+ u32 pending_bh;
+
+ bool bh_running; /* Protection from multiple */
+ int isr_overflow;
+ bool bh_requested;
+
+ int dcd_chkcount; /* check counts to prevent */
+ int cts_chkcount; /* too many IRQs if a signal */
+ int dsr_chkcount; /* is floating */
+ int ri_chkcount;
+
+ char *buffer_list; /* virtual address of Rx & Tx buffer lists */
+ unsigned long buffer_list_phys;
+
+ unsigned int rx_buf_count; /* count of total allocated Rx buffers */
+ SCADESC *rx_buf_list; /* list of receive buffer entries */
+ SCADESC_EX rx_buf_list_ex[SCAMAXDESC]; /* list of receive buffer entries */
+ unsigned int current_rx_buf;
+
+ unsigned int tx_buf_count; /* count of total allocated Tx buffers */
+ SCADESC *tx_buf_list; /* list of transmit buffer entries */
+ SCADESC_EX tx_buf_list_ex[SCAMAXDESC]; /* list of transmit buffer entries */
+ unsigned int last_tx_buf;
+
+ unsigned char *tmp_rx_buf;
+ unsigned int tmp_rx_buf_count;
+
+ bool rx_enabled;
+ bool rx_overflow;
+
+ bool tx_enabled;
+ bool tx_active;
+ u32 idle_mode;
+
+ unsigned char ie0_value;
+ unsigned char ie1_value;
+ unsigned char ie2_value;
+ unsigned char ctrlreg_value;
+ unsigned char old_signals;
+
+ char device_name[25]; /* device instance name */
+
+ int port_count;
+ int adapter_num;
+ int port_num;
+
+ struct _synclinkmp_info *port_array[SCA_MAX_PORTS];
+
+ unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */
+
+ unsigned int irq_level; /* interrupt level */
+ unsigned long irq_flags;
+ bool irq_requested; /* true if IRQ requested */
+
+ MGSL_PARAMS params; /* communications parameters */
+
+ unsigned char serial_signals; /* current serial signal states */
+
+ bool irq_occurred; /* for diagnostics use */
+ unsigned int init_error; /* Initialization startup error */
+
+ u32 last_mem_alloc;
+ unsigned char* memory_base; /* shared memory address (PCI only) */
+ u32 phys_memory_base;
+ int shared_mem_requested;
+
+ unsigned char* sca_base; /* HD64570 SCA Memory address */
+ u32 phys_sca_base;
+ u32 sca_offset;
+ bool sca_base_requested;
+
+ unsigned char* lcr_base; /* local config registers (PCI only) */
+ u32 phys_lcr_base;
+ u32 lcr_offset;
+ int lcr_mem_requested;
+
+ unsigned char* statctrl_base; /* status/control register memory */
+ u32 phys_statctrl_base;
+ u32 statctrl_offset;
+ bool sca_statctrl_requested;
+
+ u32 misc_ctrl_value;
+ char flag_buf[MAX_ASYNC_BUFFER_SIZE];
+ char char_buf[MAX_ASYNC_BUFFER_SIZE];
+ bool drop_rts_on_tx_done;
+
+ struct _input_signal_events input_signal_events;
+
+ /* SPPP/Cisco HDLC device parts */
+ int netcount;
+ spinlock_t netlock;
+
+#if SYNCLINK_GENERIC_HDLC
+ struct net_device *netdev;
+#endif
+
+} SLMP_INFO;
+
+#define MGSL_MAGIC 0x5401
+
+/*
+ * define serial signal status change macros
+ */
+#define MISCSTATUS_DCD_LATCHED (SerialSignal_DCD<<8) /* indicates change in DCD */
+#define MISCSTATUS_RI_LATCHED (SerialSignal_RI<<8) /* indicates change in RI */
+#define MISCSTATUS_CTS_LATCHED (SerialSignal_CTS<<8) /* indicates change in CTS */
+#define MISCSTATUS_DSR_LATCHED (SerialSignal_DSR<<8) /* change in DSR */
+
+/* Common Register macros */
+#define LPR 0x00
+#define PABR0 0x02
+#define PABR1 0x03
+#define WCRL 0x04
+#define WCRM 0x05
+#define WCRH 0x06
+#define DPCR 0x08
+#define DMER 0x09
+#define ISR0 0x10
+#define ISR1 0x11
+#define ISR2 0x12
+#define IER0 0x14
+#define IER1 0x15
+#define IER2 0x16
+#define ITCR 0x18
+#define INTVR 0x1a
+#define IMVR 0x1c
+
+/* MSCI Register macros */
+#define TRB 0x20
+#define TRBL 0x20
+#define TRBH 0x21
+#define SR0 0x22
+#define SR1 0x23
+#define SR2 0x24
+#define SR3 0x25
+#define FST 0x26
+#define IE0 0x28
+#define IE1 0x29
+#define IE2 0x2a
+#define FIE 0x2b
+#define CMD 0x2c
+#define MD0 0x2e
+#define MD1 0x2f
+#define MD2 0x30
+#define CTL 0x31
+#define SA0 0x32
+#define SA1 0x33
+#define IDL 0x34
+#define TMC 0x35
+#define RXS 0x36
+#define TXS 0x37
+#define TRC0 0x38
+#define TRC1 0x39
+#define RRC 0x3a
+#define CST0 0x3c
+#define CST1 0x3d
+
+/* Timer Register Macros */
+#define TCNT 0x60
+#define TCNTL 0x60
+#define TCNTH 0x61
+#define TCONR 0x62
+#define TCONRL 0x62
+#define TCONRH 0x63
+#define TMCS 0x64
+#define TEPR 0x65
+
+/* DMA Controller Register macros */
+#define DARL 0x80
+#define DARH 0x81
+#define DARB 0x82
+#define BAR 0x80
+#define BARL 0x80
+#define BARH 0x81
+#define BARB 0x82
+#define SAR 0x84
+#define SARL 0x84
+#define SARH 0x85
+#define SARB 0x86
+#define CPB 0x86
+#define CDA 0x88
+#define CDAL 0x88
+#define CDAH 0x89
+#define EDA 0x8a
+#define EDAL 0x8a
+#define EDAH 0x8b
+#define BFL 0x8c
+#define BFLL 0x8c
+#define BFLH 0x8d
+#define BCR 0x8e
+#define BCRL 0x8e
+#define BCRH 0x8f
+#define DSR 0x90
+#define DMR 0x91
+#define FCT 0x93
+#define DIR 0x94
+#define DCMD 0x95
+
+/* combine with timer or DMA register address */
+#define TIMER0 0x00
+#define TIMER1 0x08
+#define TIMER2 0x10
+#define TIMER3 0x18
+#define RXDMA 0x00
+#define TXDMA 0x20
+
+/* SCA Command Codes */
+#define NOOP 0x00
+#define TXRESET 0x01
+#define TXENABLE 0x02
+#define TXDISABLE 0x03
+#define TXCRCINIT 0x04
+#define TXCRCEXCL 0x05
+#define TXEOM 0x06
+#define TXABORT 0x07
+#define MPON 0x08
+#define TXBUFCLR 0x09
+#define RXRESET 0x11
+#define RXENABLE 0x12
+#define RXDISABLE 0x13
+#define RXCRCINIT 0x14
+#define RXREJECT 0x15
+#define SEARCHMP 0x16
+#define RXCRCEXCL 0x17
+#define RXCRCCALC 0x18
+#define CHRESET 0x21
+#define HUNT 0x31
+
+/* DMA command codes */
+#define SWABORT 0x01
+#define FEICLEAR 0x02
+
+/* IE0 */
+#define TXINTE BIT7
+#define RXINTE BIT6
+#define TXRDYE BIT1
+#define RXRDYE BIT0
+
+/* IE1 & SR1 */
+#define UDRN BIT7
+#define IDLE BIT6
+#define SYNCD BIT4
+#define FLGD BIT4
+#define CCTS BIT3
+#define CDCD BIT2
+#define BRKD BIT1
+#define ABTD BIT1
+#define GAPD BIT1
+#define BRKE BIT0
+#define IDLD BIT0
+
+/* IE2 & SR2 */
+#define EOM BIT7
+#define PMP BIT6
+#define SHRT BIT6
+#define PE BIT5
+#define ABT BIT5
+#define FRME BIT4
+#define RBIT BIT4
+#define OVRN BIT3
+#define CRCE BIT2
+
+
+/*
+ * Global linked list of SyncLink devices
+ */
+static SLMP_INFO *synclinkmp_device_list = NULL;
+static int synclinkmp_adapter_count = -1;
+static int synclinkmp_device_count = 0;
+
+/*
+ * Set this param to non-zero to load eax with the
+ * .text section address and breakpoint on module load.
+ * This is useful for use with gdb and add-symbol-file command.
+ */
+static int break_on_load = 0;
+
+/*
+ * Driver major number, defaults to zero to get auto
+ * assigned major number. May be forced as module parameter.
+ */
+static int ttymajor = 0;
+
+/*
+ * Array of user specified options for ISA adapters.
+ */
+static int debug_level = 0;
+static int maxframe[MAX_DEVICES] = {0,};
+
+module_param(break_on_load, bool, 0);
+module_param(ttymajor, int, 0);
+module_param(debug_level, int, 0);
+module_param_array(maxframe, int, NULL, 0);
+
+static char *driver_name = "SyncLink MultiPort driver";
+static char *driver_version = "$Revision: 4.38 $";
+
+static int synclinkmp_init_one(struct pci_dev *dev,const struct pci_device_id *ent);
+static void synclinkmp_remove_one(struct pci_dev *dev);
+
+static struct pci_device_id synclinkmp_pci_tbl[] = {
+ { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_SCA, PCI_ANY_ID, PCI_ANY_ID, },
+ { 0, }, /* terminate list */
+};
+MODULE_DEVICE_TABLE(pci, synclinkmp_pci_tbl);
+
+MODULE_LICENSE("GPL");
+
+static struct pci_driver synclinkmp_pci_driver = {
+ .name = "synclinkmp",
+ .id_table = synclinkmp_pci_tbl,
+ .probe = synclinkmp_init_one,
+ .remove = __devexit_p(synclinkmp_remove_one),
+};
+
+
+static struct tty_driver *serial_driver;
+
+/* number of characters left in xmit buffer before we ask for more */
+#define WAKEUP_CHARS 256
+
+
+/* tty callbacks */
+
+static int open(struct tty_struct *tty, struct file * filp);
+static void close(struct tty_struct *tty, struct file * filp);
+static void hangup(struct tty_struct *tty);
+static void set_termios(struct tty_struct *tty, struct ktermios *old_termios);
+
+static int write(struct tty_struct *tty, const unsigned char *buf, int count);
+static int put_char(struct tty_struct *tty, unsigned char ch);
+static void send_xchar(struct tty_struct *tty, char ch);
+static void wait_until_sent(struct tty_struct *tty, int timeout);
+static int write_room(struct tty_struct *tty);
+static void flush_chars(struct tty_struct *tty);
+static void flush_buffer(struct tty_struct *tty);
+static void tx_hold(struct tty_struct *tty);
+static void tx_release(struct tty_struct *tty);
+
+static int ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg);
+static int chars_in_buffer(struct tty_struct *tty);
+static void throttle(struct tty_struct * tty);
+static void unthrottle(struct tty_struct * tty);
+static int set_break(struct tty_struct *tty, int break_state);
+
+#if SYNCLINK_GENERIC_HDLC
+#define dev_to_port(D) (dev_to_hdlc(D)->priv)
+static void hdlcdev_tx_done(SLMP_INFO *info);
+static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size);
+static int hdlcdev_init(SLMP_INFO *info);
+static void hdlcdev_exit(SLMP_INFO *info);
+#endif
+
+/* ioctl handlers */
+
+static int get_stats(SLMP_INFO *info, struct mgsl_icount __user *user_icount);
+static int get_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
+static int set_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
+static int get_txidle(SLMP_INFO *info, int __user *idle_mode);
+static int set_txidle(SLMP_INFO *info, int idle_mode);
+static int tx_enable(SLMP_INFO *info, int enable);
+static int tx_abort(SLMP_INFO *info);
+static int rx_enable(SLMP_INFO *info, int enable);
+static int modem_input_wait(SLMP_INFO *info,int arg);
+static int wait_mgsl_event(SLMP_INFO *info, int __user *mask_ptr);
+static int tiocmget(struct tty_struct *tty);
+static int tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear);
+static int set_break(struct tty_struct *tty, int break_state);
+
+static void add_device(SLMP_INFO *info);
+static void device_init(int adapter_num, struct pci_dev *pdev);
+static int claim_resources(SLMP_INFO *info);
+static void release_resources(SLMP_INFO *info);
+
+static int startup(SLMP_INFO *info);
+static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info);
+static int carrier_raised(struct tty_port *port);
+static void shutdown(SLMP_INFO *info);
+static void program_hw(SLMP_INFO *info);
+static void change_params(SLMP_INFO *info);
+
+static bool init_adapter(SLMP_INFO *info);
+static bool register_test(SLMP_INFO *info);
+static bool irq_test(SLMP_INFO *info);
+static bool loopback_test(SLMP_INFO *info);
+static int adapter_test(SLMP_INFO *info);
+static bool memory_test(SLMP_INFO *info);
+
+static void reset_adapter(SLMP_INFO *info);
+static void reset_port(SLMP_INFO *info);
+static void async_mode(SLMP_INFO *info);
+static void hdlc_mode(SLMP_INFO *info);
+
+static void rx_stop(SLMP_INFO *info);
+static void rx_start(SLMP_INFO *info);
+static void rx_reset_buffers(SLMP_INFO *info);
+static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last);
+static bool rx_get_frame(SLMP_INFO *info);
+
+static void tx_start(SLMP_INFO *info);
+static void tx_stop(SLMP_INFO *info);
+static void tx_load_fifo(SLMP_INFO *info);
+static void tx_set_idle(SLMP_INFO *info);
+static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count);
+
+static void get_signals(SLMP_INFO *info);
+static void set_signals(SLMP_INFO *info);
+static void enable_loopback(SLMP_INFO *info, int enable);
+static void set_rate(SLMP_INFO *info, u32 data_rate);
+
+static int bh_action(SLMP_INFO *info);
+static void bh_handler(struct work_struct *work);
+static void bh_receive(SLMP_INFO *info);
+static void bh_transmit(SLMP_INFO *info);
+static void bh_status(SLMP_INFO *info);
+static void isr_timer(SLMP_INFO *info);
+static void isr_rxint(SLMP_INFO *info);
+static void isr_rxrdy(SLMP_INFO *info);
+static void isr_txint(SLMP_INFO *info);
+static void isr_txrdy(SLMP_INFO *info);
+static void isr_rxdmaok(SLMP_INFO *info);
+static void isr_rxdmaerror(SLMP_INFO *info);
+static void isr_txdmaok(SLMP_INFO *info);
+static void isr_txdmaerror(SLMP_INFO *info);
+static void isr_io_pin(SLMP_INFO *info, u16 status);
+
+static int alloc_dma_bufs(SLMP_INFO *info);
+static void free_dma_bufs(SLMP_INFO *info);
+static int alloc_buf_list(SLMP_INFO *info);
+static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *list, SCADESC_EX *list_ex,int count);
+static int alloc_tmp_rx_buf(SLMP_INFO *info);
+static void free_tmp_rx_buf(SLMP_INFO *info);
+
+static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count);
+static void trace_block(SLMP_INFO *info, const char* data, int count, int xmit);
+static void tx_timeout(unsigned long context);
+static void status_timeout(unsigned long context);
+
+static unsigned char read_reg(SLMP_INFO *info, unsigned char addr);
+static void write_reg(SLMP_INFO *info, unsigned char addr, unsigned char val);
+static u16 read_reg16(SLMP_INFO *info, unsigned char addr);
+static void write_reg16(SLMP_INFO *info, unsigned char addr, u16 val);
+static unsigned char read_status_reg(SLMP_INFO * info);
+static void write_control_reg(SLMP_INFO * info);
+
+
+static unsigned char rx_active_fifo_level = 16; // rx request FIFO activation level in bytes
+static unsigned char tx_active_fifo_level = 16; // tx request FIFO activation level in bytes
+static unsigned char tx_negate_fifo_level = 32; // tx request FIFO negation level in bytes
+
+static u32 misc_ctrl_value = 0x007e4040;
+static u32 lcr1_brdr_value = 0x00800028;
+
+static u32 read_ahead_count = 8;
+
+/* DPCR, DMA Priority Control
+ *
+ * 07..05 Not used, must be 0
+ * 04 BRC, bus release condition: 0=all transfers complete
+ * 1=release after 1 xfer on all channels
+ * 03 CCC, channel change condition: 0=every cycle
+ * 1=after each channel completes all xfers
+ * 02..00 PR<2..0>, priority 100=round robin
+ *
+ * 00000100 = 0x00
+ */
+static unsigned char dma_priority = 0x04;
+
+// Number of bytes that can be written to shared RAM
+// in a single write operation
+static u32 sca_pci_load_interval = 64;
+
+/*
+ * 1st function defined in .text section. Calling this function in
+ * init_module() followed by a breakpoint allows a remote debugger
+ * (gdb) to get the .text address for the add-symbol-file command.
+ * This allows remote debugging of dynamically loadable modules.
+ */
+static void* synclinkmp_get_text_ptr(void);
+static void* synclinkmp_get_text_ptr(void) {return synclinkmp_get_text_ptr;}
+
+static inline int sanity_check(SLMP_INFO *info,
+ char *name, const char *routine)
+{
+#ifdef SANITY_CHECK
+ static const char *badmagic =
+ "Warning: bad magic number for synclinkmp_struct (%s) in %s\n";
+ static const char *badinfo =
+ "Warning: null synclinkmp_struct for (%s) in %s\n";
+
+ if (!info) {
+ printk(badinfo, name, routine);
+ return 1;
+ }
+ if (info->magic != MGSL_MAGIC) {
+ printk(badmagic, name, routine);
+ return 1;
+ }
+#else
+ if (!info)
+ return 1;
+#endif
+ return 0;
+}
+
+/**
+ * line discipline callback wrappers
+ *
+ * The wrappers maintain line discipline references
+ * while calling into the line discipline.
+ *
+ * ldisc_receive_buf - pass receive data to line discipline
+ */
+
+static void ldisc_receive_buf(struct tty_struct *tty,
+ const __u8 *data, char *flags, int count)
+{
+ struct tty_ldisc *ld;
+ if (!tty)
+ return;
+ ld = tty_ldisc_ref(tty);
+ if (ld) {
+ if (ld->ops->receive_buf)
+ ld->ops->receive_buf(tty, data, flags, count);
+ tty_ldisc_deref(ld);
+ }
+}
+
+/* tty callbacks */
+
+/* Called when a port is opened. Init and enable port.
+ */
+static int open(struct tty_struct *tty, struct file *filp)
+{
+ SLMP_INFO *info;
+ int retval, line;
+ unsigned long flags;
+
+ line = tty->index;
+ if ((line < 0) || (line >= synclinkmp_device_count)) {
+ printk("%s(%d): open with invalid line #%d.\n",
+ __FILE__,__LINE__,line);
+ return -ENODEV;
+ }
+
+ info = synclinkmp_device_list;
+ while(info && info->line != line)
+ info = info->next_device;
+ if (sanity_check(info, tty->name, "open"))
+ return -ENODEV;
+ if ( info->init_error ) {
+ printk("%s(%d):%s device is not allocated, init error=%d\n",
+ __FILE__,__LINE__,info->device_name,info->init_error);
+ return -ENODEV;
+ }
+
+ tty->driver_data = info;
+ info->port.tty = tty;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s open(), old ref count = %d\n",
+ __FILE__,__LINE__,tty->driver->name, info->port.count);
+
+ /* If port is closing, signal caller to try again */
+ if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
+ if (info->port.flags & ASYNC_CLOSING)
+ interruptible_sleep_on(&info->port.close_wait);
+ retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
+ -EAGAIN : -ERESTARTSYS);
+ goto cleanup;
+ }
+
+ info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+
+ spin_lock_irqsave(&info->netlock, flags);
+ if (info->netcount) {
+ retval = -EBUSY;
+ spin_unlock_irqrestore(&info->netlock, flags);
+ goto cleanup;
+ }
+ info->port.count++;
+ spin_unlock_irqrestore(&info->netlock, flags);
+
+ if (info->port.count == 1) {
+ /* 1st open on this device, init hardware */
+ retval = startup(info);
+ if (retval < 0)
+ goto cleanup;
+ }
+
+ retval = block_til_ready(tty, filp, info);
+ if (retval) {
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s block_til_ready() returned %d\n",
+ __FILE__,__LINE__, info->device_name, retval);
+ goto cleanup;
+ }
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s open() success\n",
+ __FILE__,__LINE__, info->device_name);
+ retval = 0;
+
+cleanup:
+ if (retval) {
+ if (tty->count == 1)
+ info->port.tty = NULL; /* tty layer will release tty struct */
+ if(info->port.count)
+ info->port.count--;
+ }
+
+ return retval;
+}
+
+/* Called when port is closed. Wait for remaining data to be
+ * sent. Disable port and free resources.
+ */
+static void close(struct tty_struct *tty, struct file *filp)
+{
+ SLMP_INFO * info = tty->driver_data;
+
+ if (sanity_check(info, tty->name, "close"))
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s close() entry, count=%d\n",
+ __FILE__,__LINE__, info->device_name, info->port.count);
+
+ if (tty_port_close_start(&info->port, tty, filp) == 0)
+ goto cleanup;
+
+ mutex_lock(&info->port.mutex);
+ if (info->port.flags & ASYNC_INITIALIZED)
+ wait_until_sent(tty, info->timeout);
+
+ flush_buffer(tty);
+ tty_ldisc_flush(tty);
+ shutdown(info);
+ mutex_unlock(&info->port.mutex);
+
+ tty_port_close_end(&info->port, tty);
+ info->port.tty = NULL;
+cleanup:
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__,
+ tty->driver->name, info->port.count);
+}
+
+/* Called by tty_hangup() when a hangup is signaled.
+ * This is the same as closing all open descriptors for the port.
+ */
+static void hangup(struct tty_struct *tty)
+{
+ SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s hangup()\n",
+ __FILE__,__LINE__, info->device_name );
+
+ if (sanity_check(info, tty->name, "hangup"))
+ return;
+
+ mutex_lock(&info->port.mutex);
+ flush_buffer(tty);
+ shutdown(info);
+
+ spin_lock_irqsave(&info->port.lock, flags);
+ info->port.count = 0;
+ info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
+ info->port.tty = NULL;
+ spin_unlock_irqrestore(&info->port.lock, flags);
+ mutex_unlock(&info->port.mutex);
+
+ wake_up_interruptible(&info->port.open_wait);
+}
+
+/* Set new termios settings
+ */
+static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+{
+ SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s set_termios()\n", __FILE__,__LINE__,
+ tty->driver->name );
+
+ change_params(info);
+
+ /* Handle transition to B0 status */
+ if (old_termios->c_cflag & CBAUD &&
+ !(tty->termios->c_cflag & CBAUD)) {
+ info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+ spin_lock_irqsave(&info->lock,flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+
+ /* Handle transition away from B0 status */
+ if (!(old_termios->c_cflag & CBAUD) &&
+ tty->termios->c_cflag & CBAUD) {
+ info->serial_signals |= SerialSignal_DTR;
+ if (!(tty->termios->c_cflag & CRTSCTS) ||
+ !test_bit(TTY_THROTTLED, &tty->flags)) {
+ info->serial_signals |= SerialSignal_RTS;
+ }
+ spin_lock_irqsave(&info->lock,flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+
+ /* Handle turning off CRTSCTS */
+ if (old_termios->c_cflag & CRTSCTS &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ tx_release(tty);
+ }
+}
+
+/* Send a block of data
+ *
+ * Arguments:
+ *
+ * tty pointer to tty information structure
+ * buf pointer to buffer containing send data
+ * count size of send data in bytes
+ *
+ * Return Value: number of characters written
+ */
+static int write(struct tty_struct *tty,
+ const unsigned char *buf, int count)
+{
+ int c, ret = 0;
+ SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s write() count=%d\n",
+ __FILE__,__LINE__,info->device_name,count);
+
+ if (sanity_check(info, tty->name, "write"))
+ goto cleanup;
+
+ if (!info->tx_buf)
+ goto cleanup;
+
+ if (info->params.mode == MGSL_MODE_HDLC) {
+ if (count > info->max_frame_size) {
+ ret = -EIO;
+ goto cleanup;
+ }
+ if (info->tx_active)
+ goto cleanup;
+ if (info->tx_count) {
+ /* send accumulated data from send_char() calls */
+ /* as frame and wait before accepting more data. */
+ tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
+ goto start;
+ }
+ ret = info->tx_count = count;
+ tx_load_dma_buffer(info, buf, count);
+ goto start;
+ }
+
+ for (;;) {
+ c = min_t(int, count,
+ min(info->max_frame_size - info->tx_count - 1,
+ info->max_frame_size - info->tx_put));
+ if (c <= 0)
+ break;
+
+ memcpy(info->tx_buf + info->tx_put, buf, c);
+
+ spin_lock_irqsave(&info->lock,flags);
+ info->tx_put += c;
+ if (info->tx_put >= info->max_frame_size)
+ info->tx_put -= info->max_frame_size;
+ info->tx_count += c;
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ buf += c;
+ count -= c;
+ ret += c;
+ }
+
+ if (info->params.mode == MGSL_MODE_HDLC) {
+ if (count) {
+ ret = info->tx_count = 0;
+ goto cleanup;
+ }
+ tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
+ }
+start:
+ if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
+ spin_lock_irqsave(&info->lock,flags);
+ if (!info->tx_active)
+ tx_start(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+
+cleanup:
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk( "%s(%d):%s write() returning=%d\n",
+ __FILE__,__LINE__,info->device_name,ret);
+ return ret;
+}
+
+/* Add a character to the transmit buffer.
+ */
+static int put_char(struct tty_struct *tty, unsigned char ch)
+{
+ SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
+ int ret = 0;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO ) {
+ printk( "%s(%d):%s put_char(%d)\n",
+ __FILE__,__LINE__,info->device_name,ch);
+ }
+
+ if (sanity_check(info, tty->name, "put_char"))
+ return 0;
+
+ if (!info->tx_buf)
+ return 0;
+
+ spin_lock_irqsave(&info->lock,flags);
+
+ if ( (info->params.mode != MGSL_MODE_HDLC) ||
+ !info->tx_active ) {
+
+ if (info->tx_count < info->max_frame_size - 1) {
+ info->tx_buf[info->tx_put++] = ch;
+ if (info->tx_put >= info->max_frame_size)
+ info->tx_put -= info->max_frame_size;
+ info->tx_count++;
+ ret = 1;
+ }
+ }
+
+ spin_unlock_irqrestore(&info->lock,flags);
+ return ret;
+}
+
+/* Send a high-priority XON/XOFF character
+ */
+static void send_xchar(struct tty_struct *tty, char ch)
+{
+ SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s send_xchar(%d)\n",
+ __FILE__,__LINE__, info->device_name, ch );
+
+ if (sanity_check(info, tty->name, "send_xchar"))
+ return;
+
+ info->x_char = ch;
+ if (ch) {
+ /* Make sure transmit interrupts are on */
+ spin_lock_irqsave(&info->lock,flags);
+ if (!info->tx_enabled)
+ tx_start(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+}
+
+/* Wait until the transmitter is empty.
+ */
+static void wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ SLMP_INFO * info = tty->driver_data;
+ unsigned long orig_jiffies, char_time;
+
+ if (!info )
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s wait_until_sent() entry\n",
+ __FILE__,__LINE__, info->device_name );
+
+ if (sanity_check(info, tty->name, "wait_until_sent"))
+ return;
+
+ if (!test_bit(ASYNCB_INITIALIZED, &info->port.flags))
+ goto exit;
+
+ orig_jiffies = jiffies;
+
+ /* Set check interval to 1/5 of estimated time to
+ * send a character, and make it at least 1. The check
+ * interval should also be less than the timeout.
+ * Note: use tight timings here to satisfy the NIST-PCTS.
+ */
+
+ if ( info->params.data_rate ) {
+ char_time = info->timeout/(32 * 5);
+ if (!char_time)
+ char_time++;
+ } else
+ char_time = 1;
+
+ if (timeout)
+ char_time = min_t(unsigned long, char_time, timeout);
+
+ if ( info->params.mode == MGSL_MODE_HDLC ) {
+ while (info->tx_active) {
+ msleep_interruptible(jiffies_to_msecs(char_time));
+ if (signal_pending(current))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies + timeout))
+ break;
+ }
+ } else {
+ /*
+ * TODO: determine if there is something similar to USC16C32
+ * TXSTATUS_ALL_SENT status
+ */
+ while ( info->tx_active && info->tx_enabled) {
+ msleep_interruptible(jiffies_to_msecs(char_time));
+ if (signal_pending(current))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies + timeout))
+ break;
+ }
+ }
+
+exit:
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s wait_until_sent() exit\n",
+ __FILE__,__LINE__, info->device_name );
+}
+
+/* Return the count of free bytes in transmit buffer
+ */
+static int write_room(struct tty_struct *tty)
+{
+ SLMP_INFO *info = tty->driver_data;
+ int ret;
+
+ if (sanity_check(info, tty->name, "write_room"))
+ return 0;
+
+ if (info->params.mode == MGSL_MODE_HDLC) {
+ ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE;
+ } else {
+ ret = info->max_frame_size - info->tx_count - 1;
+ if (ret < 0)
+ ret = 0;
+ }
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s write_room()=%d\n",
+ __FILE__, __LINE__, info->device_name, ret);
+
+ return ret;
+}
+
+/* enable transmitter and send remaining buffered characters
+ */
+static void flush_chars(struct tty_struct *tty)
+{
+ SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):%s flush_chars() entry tx_count=%d\n",
+ __FILE__,__LINE__,info->device_name,info->tx_count);
+
+ if (sanity_check(info, tty->name, "flush_chars"))
+ return;
+
+ if (info->tx_count <= 0 || tty->stopped || tty->hw_stopped ||
+ !info->tx_buf)
+ return;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):%s flush_chars() entry, starting transmitter\n",
+ __FILE__,__LINE__,info->device_name );
+
+ spin_lock_irqsave(&info->lock,flags);
+
+ if (!info->tx_active) {
+ if ( (info->params.mode == MGSL_MODE_HDLC) &&
+ info->tx_count ) {
+ /* operating in synchronous (frame oriented) mode */
+ /* copy data from circular tx_buf to */
+ /* transmit DMA buffer. */
+ tx_load_dma_buffer(info,
+ info->tx_buf,info->tx_count);
+ }
+ tx_start(info);
+ }
+
+ spin_unlock_irqrestore(&info->lock,flags);
+}
+
+/* Discard all data in the send buffer
+ */
+static void flush_buffer(struct tty_struct *tty)
+{
+ SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s flush_buffer() entry\n",
+ __FILE__,__LINE__, info->device_name );
+
+ if (sanity_check(info, tty->name, "flush_buffer"))
+ return;
+
+ spin_lock_irqsave(&info->lock,flags);
+ info->tx_count = info->tx_put = info->tx_get = 0;
+ del_timer(&info->tx_timer);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ tty_wakeup(tty);
+}
+
+/* throttle (stop) transmitter
+ */
+static void tx_hold(struct tty_struct *tty)
+{
+ SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
+
+ if (sanity_check(info, tty->name, "tx_hold"))
+ return;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk("%s(%d):%s tx_hold()\n",
+ __FILE__,__LINE__,info->device_name);
+
+ spin_lock_irqsave(&info->lock,flags);
+ if (info->tx_enabled)
+ tx_stop(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+}
+
+/* release (start) transmitter
+ */
+static void tx_release(struct tty_struct *tty)
+{
+ SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
+
+ if (sanity_check(info, tty->name, "tx_release"))
+ return;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk("%s(%d):%s tx_release()\n",
+ __FILE__,__LINE__,info->device_name);
+
+ spin_lock_irqsave(&info->lock,flags);
+ if (!info->tx_enabled)
+ tx_start(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+}
+
+/* Service an IOCTL request
+ *
+ * Arguments:
+ *
+ * tty pointer to tty instance data
+ * cmd IOCTL command code
+ * arg command argument/context
+ *
+ * Return Value: 0 if success, otherwise error code
+ */
+static int ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ SLMP_INFO *info = tty->driver_data;
+ void __user *argp = (void __user *)arg;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s ioctl() cmd=%08X\n", __FILE__,__LINE__,
+ info->device_name, cmd );
+
+ if (sanity_check(info, tty->name, "ioctl"))
+ return -ENODEV;
+
+ if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
+ (cmd != TIOCMIWAIT)) {
+ if (tty->flags & (1 << TTY_IO_ERROR))
+ return -EIO;
+ }
+
+ switch (cmd) {
+ case MGSL_IOCGPARAMS:
+ return get_params(info, argp);
+ case MGSL_IOCSPARAMS:
+ return set_params(info, argp);
+ case MGSL_IOCGTXIDLE:
+ return get_txidle(info, argp);
+ case MGSL_IOCSTXIDLE:
+ return set_txidle(info, (int)arg);
+ case MGSL_IOCTXENABLE:
+ return tx_enable(info, (int)arg);
+ case MGSL_IOCRXENABLE:
+ return rx_enable(info, (int)arg);
+ case MGSL_IOCTXABORT:
+ return tx_abort(info);
+ case MGSL_IOCGSTATS:
+ return get_stats(info, argp);
+ case MGSL_IOCWAITEVENT:
+ return wait_mgsl_event(info, argp);
+ case MGSL_IOCLOOPTXDONE:
+ return 0; // TODO: Not supported, need to document
+ /* Wait for modem input (DCD,RI,DSR,CTS) change
+ * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS)
+ */
+ case TIOCMIWAIT:
+ return modem_input_wait(info,(int)arg);
+
+ /*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for
+ * RI where only 0->1 is counted.
+ */
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+static int get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ SLMP_INFO *info = tty->driver_data;
+ struct mgsl_icount cnow; /* kernel counter temps */
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+
+ return 0;
+}
+
+/*
+ * /proc fs routines....
+ */
+
+static inline void line_info(struct seq_file *m, SLMP_INFO *info)
+{
+ char stat_buf[30];
+ unsigned long flags;
+
+ seq_printf(m, "%s: SCABase=%08x Mem=%08X StatusControl=%08x LCR=%08X\n"
+ "\tIRQ=%d MaxFrameSize=%u\n",
+ info->device_name,
+ info->phys_sca_base,
+ info->phys_memory_base,
+ info->phys_statctrl_base,
+ info->phys_lcr_base,
+ info->irq_level,
+ info->max_frame_size );
+
+ /* output current serial signal states */
+ spin_lock_irqsave(&info->lock,flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ stat_buf[0] = 0;
+ stat_buf[1] = 0;
+ if (info->serial_signals & SerialSignal_RTS)
+ strcat(stat_buf, "|RTS");
+ if (info->serial_signals & SerialSignal_CTS)
+ strcat(stat_buf, "|CTS");
+ if (info->serial_signals & SerialSignal_DTR)
+ strcat(stat_buf, "|DTR");
+ if (info->serial_signals & SerialSignal_DSR)
+ strcat(stat_buf, "|DSR");
+ if (info->serial_signals & SerialSignal_DCD)
+ strcat(stat_buf, "|CD");
+ if (info->serial_signals & SerialSignal_RI)
+ strcat(stat_buf, "|RI");
+
+ if (info->params.mode == MGSL_MODE_HDLC) {
+ seq_printf(m, "\tHDLC txok:%d rxok:%d",
+ info->icount.txok, info->icount.rxok);
+ if (info->icount.txunder)
+ seq_printf(m, " txunder:%d", info->icount.txunder);
+ if (info->icount.txabort)
+ seq_printf(m, " txabort:%d", info->icount.txabort);
+ if (info->icount.rxshort)
+ seq_printf(m, " rxshort:%d", info->icount.rxshort);
+ if (info->icount.rxlong)
+ seq_printf(m, " rxlong:%d", info->icount.rxlong);
+ if (info->icount.rxover)
+ seq_printf(m, " rxover:%d", info->icount.rxover);
+ if (info->icount.rxcrc)
+ seq_printf(m, " rxlong:%d", info->icount.rxcrc);
+ } else {
+ seq_printf(m, "\tASYNC tx:%d rx:%d",
+ info->icount.tx, info->icount.rx);
+ if (info->icount.frame)
+ seq_printf(m, " fe:%d", info->icount.frame);
+ if (info->icount.parity)
+ seq_printf(m, " pe:%d", info->icount.parity);
+ if (info->icount.brk)
+ seq_printf(m, " brk:%d", info->icount.brk);
+ if (info->icount.overrun)
+ seq_printf(m, " oe:%d", info->icount.overrun);
+ }
+
+ /* Append serial signal status to end */
+ seq_printf(m, " %s\n", stat_buf+1);
+
+ seq_printf(m, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
+ info->tx_active,info->bh_requested,info->bh_running,
+ info->pending_bh);
+}
+
+/* Called to print information about devices
+ */
+static int synclinkmp_proc_show(struct seq_file *m, void *v)
+{
+ SLMP_INFO *info;
+
+ seq_printf(m, "synclinkmp driver:%s\n", driver_version);
+
+ info = synclinkmp_device_list;
+ while( info ) {
+ line_info(m, info);
+ info = info->next_device;
+ }
+ return 0;
+}
+
+static int synclinkmp_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, synclinkmp_proc_show, NULL);
+}
+
+static const struct file_operations synclinkmp_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = synclinkmp_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/* Return the count of bytes in transmit buffer
+ */
+static int chars_in_buffer(struct tty_struct *tty)
+{
+ SLMP_INFO *info = tty->driver_data;
+
+ if (sanity_check(info, tty->name, "chars_in_buffer"))
+ return 0;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s chars_in_buffer()=%d\n",
+ __FILE__, __LINE__, info->device_name, info->tx_count);
+
+ return info->tx_count;
+}
+
+/* Signal remote device to throttle send data (our receive data)
+ */
+static void throttle(struct tty_struct * tty)
+{
+ SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s throttle() entry\n",
+ __FILE__,__LINE__, info->device_name );
+
+ if (sanity_check(info, tty->name, "throttle"))
+ return;
+
+ if (I_IXOFF(tty))
+ send_xchar(tty, STOP_CHAR(tty));
+
+ if (tty->termios->c_cflag & CRTSCTS) {
+ spin_lock_irqsave(&info->lock,flags);
+ info->serial_signals &= ~SerialSignal_RTS;
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+}
+
+/* Signal remote device to stop throttling send data (our receive data)
+ */
+static void unthrottle(struct tty_struct * tty)
+{
+ SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s unthrottle() entry\n",
+ __FILE__,__LINE__, info->device_name );
+
+ if (sanity_check(info, tty->name, "unthrottle"))
+ return;
+
+ if (I_IXOFF(tty)) {
+ if (info->x_char)
+ info->x_char = 0;
+ else
+ send_xchar(tty, START_CHAR(tty));
+ }
+
+ if (tty->termios->c_cflag & CRTSCTS) {
+ spin_lock_irqsave(&info->lock,flags);
+ info->serial_signals |= SerialSignal_RTS;
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+}
+
+/* set or clear transmit break condition
+ * break_state -1=set break condition, 0=clear
+ */
+static int set_break(struct tty_struct *tty, int break_state)
+{
+ unsigned char RegValue;
+ SLMP_INFO * info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s set_break(%d)\n",
+ __FILE__,__LINE__, info->device_name, break_state);
+
+ if (sanity_check(info, tty->name, "set_break"))
+ return -EINVAL;
+
+ spin_lock_irqsave(&info->lock,flags);
+ RegValue = read_reg(info, CTL);
+ if (break_state == -1)
+ RegValue |= BIT3;
+ else
+ RegValue &= ~BIT3;
+ write_reg(info, CTL, RegValue);
+ spin_unlock_irqrestore(&info->lock,flags);
+ return 0;
+}
+
+#if SYNCLINK_GENERIC_HDLC
+
+/**
+ * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
+ * set encoding and frame check sequence (FCS) options
+ *
+ * dev pointer to network device structure
+ * encoding serial encoding setting
+ * parity FCS setting
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ SLMP_INFO *info = dev_to_port(dev);
+ unsigned char new_encoding;
+ unsigned short new_crctype;
+
+ /* return error if TTY interface open */
+ if (info->port.count)
+ return -EBUSY;
+
+ switch (encoding)
+ {
+ case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
+ case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
+ case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
+ case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
+ case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
+ default: return -EINVAL;
+ }
+
+ switch (parity)
+ {
+ case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
+ case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
+ case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
+ default: return -EINVAL;
+ }
+
+ info->params.encoding = new_encoding;
+ info->params.crc_type = new_crctype;
+
+ /* if network interface up, reprogram hardware */
+ if (info->netcount)
+ program_hw(info);
+
+ return 0;
+}
+
+/**
+ * called by generic HDLC layer to send frame
+ *
+ * skb socket buffer containing HDLC frame
+ * dev pointer to network device structure
+ */
+static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ SLMP_INFO *info = dev_to_port(dev);
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
+
+ /* stop sending until this frame completes */
+ netif_stop_queue(dev);
+
+ /* copy data to device buffers */
+ info->tx_count = skb->len;
+ tx_load_dma_buffer(info, skb->data, skb->len);
+
+ /* update network statistics */
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+
+ /* done with socket buffer, so free it */
+ dev_kfree_skb(skb);
+
+ /* save start time for transmit timeout detection */
+ dev->trans_start = jiffies;
+
+ /* start hardware transmitter if necessary */
+ spin_lock_irqsave(&info->lock,flags);
+ if (!info->tx_active)
+ tx_start(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ return NETDEV_TX_OK;
+}
+
+/**
+ * called by network layer when interface enabled
+ * claim resources and initialize hardware
+ *
+ * dev pointer to network device structure
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_open(struct net_device *dev)
+{
+ SLMP_INFO *info = dev_to_port(dev);
+ int rc;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
+
+ /* generic HDLC layer open processing */
+ if ((rc = hdlc_open(dev)))
+ return rc;
+
+ /* arbitrate between network and tty opens */
+ spin_lock_irqsave(&info->netlock, flags);
+ if (info->port.count != 0 || info->netcount != 0) {
+ printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
+ spin_unlock_irqrestore(&info->netlock, flags);
+ return -EBUSY;
+ }
+ info->netcount=1;
+ spin_unlock_irqrestore(&info->netlock, flags);
+
+ /* claim resources and init adapter */
+ if ((rc = startup(info)) != 0) {
+ spin_lock_irqsave(&info->netlock, flags);
+ info->netcount=0;
+ spin_unlock_irqrestore(&info->netlock, flags);
+ return rc;
+ }
+
+ /* assert DTR and RTS, apply hardware settings */
+ info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+ program_hw(info);
+
+ /* enable network layer transmit */
+ dev->trans_start = jiffies;
+ netif_start_queue(dev);
+
+ /* inform generic HDLC layer of current DCD status */
+ spin_lock_irqsave(&info->lock, flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+ if (info->serial_signals & SerialSignal_DCD)
+ netif_carrier_on(dev);
+ else
+ netif_carrier_off(dev);
+ return 0;
+}
+
+/**
+ * called by network layer when interface is disabled
+ * shutdown hardware and release resources
+ *
+ * dev pointer to network device structure
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_close(struct net_device *dev)
+{
+ SLMP_INFO *info = dev_to_port(dev);
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
+
+ netif_stop_queue(dev);
+
+ /* shutdown adapter and release resources */
+ shutdown(info);
+
+ hdlc_close(dev);
+
+ spin_lock_irqsave(&info->netlock, flags);
+ info->netcount=0;
+ spin_unlock_irqrestore(&info->netlock, flags);
+
+ return 0;
+}
+
+/**
+ * called by network layer to process IOCTL call to network device
+ *
+ * dev pointer to network device structure
+ * ifr pointer to network interface request structure
+ * cmd IOCTL command code
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ const size_t size = sizeof(sync_serial_settings);
+ sync_serial_settings new_line;
+ sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
+ SLMP_INFO *info = dev_to_port(dev);
+ unsigned int flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
+
+ /* return error if TTY interface open */
+ if (info->port.count)
+ return -EBUSY;
+
+ if (cmd != SIOCWANDEV)
+ return hdlc_ioctl(dev, ifr, cmd);
+
+ switch(ifr->ifr_settings.type) {
+ case IF_GET_IFACE: /* return current sync_serial_settings */
+
+ ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
+ if (ifr->ifr_settings.size < size) {
+ ifr->ifr_settings.size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+
+ flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
+ HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
+ HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
+ HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
+
+ switch (flags){
+ case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
+ case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
+ case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
+ case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
+ default: new_line.clock_type = CLOCK_DEFAULT;
+ }
+
+ new_line.clock_rate = info->params.clock_speed;
+ new_line.loopback = info->params.loopback ? 1:0;
+
+ if (copy_to_user(line, &new_line, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
+
+ if(!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (copy_from_user(&new_line, line, size))
+ return -EFAULT;
+
+ switch (new_line.clock_type)
+ {
+ case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
+ case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
+ case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
+ case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
+ case CLOCK_DEFAULT: flags = info->params.flags &
+ (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
+ HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
+ HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
+ HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
+ default: return -EINVAL;
+ }
+
+ if (new_line.loopback != 0 && new_line.loopback != 1)
+ return -EINVAL;
+
+ info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
+ HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
+ HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
+ HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
+ info->params.flags |= flags;
+
+ info->params.loopback = new_line.loopback;
+
+ if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
+ info->params.clock_speed = new_line.clock_rate;
+ else
+ info->params.clock_speed = 0;
+
+ /* if network interface up, reprogram hardware */
+ if (info->netcount)
+ program_hw(info);
+ return 0;
+
+ default:
+ return hdlc_ioctl(dev, ifr, cmd);
+ }
+}
+
+/**
+ * called by network layer when transmit timeout is detected
+ *
+ * dev pointer to network device structure
+ */
+static void hdlcdev_tx_timeout(struct net_device *dev)
+{
+ SLMP_INFO *info = dev_to_port(dev);
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("hdlcdev_tx_timeout(%s)\n",dev->name);
+
+ dev->stats.tx_errors++;
+ dev->stats.tx_aborted_errors++;
+
+ spin_lock_irqsave(&info->lock,flags);
+ tx_stop(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ netif_wake_queue(dev);
+}
+
+/**
+ * called by device driver when transmit completes
+ * reenable network layer transmit if stopped
+ *
+ * info pointer to device instance information
+ */
+static void hdlcdev_tx_done(SLMP_INFO *info)
+{
+ if (netif_queue_stopped(info->netdev))
+ netif_wake_queue(info->netdev);
+}
+
+/**
+ * called by device driver when frame received
+ * pass frame to network layer
+ *
+ * info pointer to device instance information
+ * buf pointer to buffer contianing frame data
+ * size count of data bytes in buf
+ */
+static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size)
+{
+ struct sk_buff *skb = dev_alloc_skb(size);
+ struct net_device *dev = info->netdev;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("hdlcdev_rx(%s)\n",dev->name);
+
+ if (skb == NULL) {
+ printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n",
+ dev->name);
+ dev->stats.rx_dropped++;
+ return;
+ }
+
+ memcpy(skb_put(skb, size), buf, size);
+
+ skb->protocol = hdlc_type_trans(skb, dev);
+
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += size;
+
+ netif_rx(skb);
+}
+
+static const struct net_device_ops hdlcdev_ops = {
+ .ndo_open = hdlcdev_open,
+ .ndo_stop = hdlcdev_close,
+ .ndo_change_mtu = hdlc_change_mtu,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_do_ioctl = hdlcdev_ioctl,
+ .ndo_tx_timeout = hdlcdev_tx_timeout,
+};
+
+/**
+ * called by device driver when adding device instance
+ * do generic HDLC initialization
+ *
+ * info pointer to device instance information
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_init(SLMP_INFO *info)
+{
+ int rc;
+ struct net_device *dev;
+ hdlc_device *hdlc;
+
+ /* allocate and initialize network and HDLC layer objects */
+
+ if (!(dev = alloc_hdlcdev(info))) {
+ printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
+ return -ENOMEM;
+ }
+
+ /* for network layer reporting purposes only */
+ dev->mem_start = info->phys_sca_base;
+ dev->mem_end = info->phys_sca_base + SCA_BASE_SIZE - 1;
+ dev->irq = info->irq_level;
+
+ /* network layer callbacks and settings */
+ dev->netdev_ops = &hdlcdev_ops;
+ dev->watchdog_timeo = 10 * HZ;
+ dev->tx_queue_len = 50;
+
+ /* generic HDLC layer callbacks and settings */
+ hdlc = dev_to_hdlc(dev);
+ hdlc->attach = hdlcdev_attach;
+ hdlc->xmit = hdlcdev_xmit;
+
+ /* register objects with HDLC layer */
+ if ((rc = register_hdlc_device(dev))) {
+ printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
+ free_netdev(dev);
+ return rc;
+ }
+
+ info->netdev = dev;
+ return 0;
+}
+
+/**
+ * called by device driver when removing device instance
+ * do generic HDLC cleanup
+ *
+ * info pointer to device instance information
+ */
+static void hdlcdev_exit(SLMP_INFO *info)
+{
+ unregister_hdlc_device(info->netdev);
+ free_netdev(info->netdev);
+ info->netdev = NULL;
+}
+
+#endif /* CONFIG_HDLC */
+
+
+/* Return next bottom half action to perform.
+ * Return Value: BH action code or 0 if nothing to do.
+ */
+static int bh_action(SLMP_INFO *info)
+{
+ unsigned long flags;
+ int rc = 0;
+
+ spin_lock_irqsave(&info->lock,flags);
+
+ if (info->pending_bh & BH_RECEIVE) {
+ info->pending_bh &= ~BH_RECEIVE;
+ rc = BH_RECEIVE;
+ } else if (info->pending_bh & BH_TRANSMIT) {
+ info->pending_bh &= ~BH_TRANSMIT;
+ rc = BH_TRANSMIT;
+ } else if (info->pending_bh & BH_STATUS) {
+ info->pending_bh &= ~BH_STATUS;
+ rc = BH_STATUS;
+ }
+
+ if (!rc) {
+ /* Mark BH routine as complete */
+ info->bh_running = false;
+ info->bh_requested = false;
+ }
+
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ return rc;
+}
+
+/* Perform bottom half processing of work items queued by ISR.
+ */
+static void bh_handler(struct work_struct *work)
+{
+ SLMP_INFO *info = container_of(work, SLMP_INFO, task);
+ int action;
+
+ if (!info)
+ return;
+
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk( "%s(%d):%s bh_handler() entry\n",
+ __FILE__,__LINE__,info->device_name);
+
+ info->bh_running = true;
+
+ while((action = bh_action(info)) != 0) {
+
+ /* Process work item */
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk( "%s(%d):%s bh_handler() work item action=%d\n",
+ __FILE__,__LINE__,info->device_name, action);
+
+ switch (action) {
+
+ case BH_RECEIVE:
+ bh_receive(info);
+ break;
+ case BH_TRANSMIT:
+ bh_transmit(info);
+ break;
+ case BH_STATUS:
+ bh_status(info);
+ break;
+ default:
+ /* unknown work item ID */
+ printk("%s(%d):%s Unknown work item ID=%08X!\n",
+ __FILE__,__LINE__,info->device_name,action);
+ break;
+ }
+ }
+
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk( "%s(%d):%s bh_handler() exit\n",
+ __FILE__,__LINE__,info->device_name);
+}
+
+static void bh_receive(SLMP_INFO *info)
+{
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk( "%s(%d):%s bh_receive()\n",
+ __FILE__,__LINE__,info->device_name);
+
+ while( rx_get_frame(info) );
+}
+
+static void bh_transmit(SLMP_INFO *info)
+{
+ struct tty_struct *tty = info->port.tty;
+
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk( "%s(%d):%s bh_transmit() entry\n",
+ __FILE__,__LINE__,info->device_name);
+
+ if (tty)
+ tty_wakeup(tty);
+}
+
+static void bh_status(SLMP_INFO *info)
+{
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk( "%s(%d):%s bh_status() entry\n",
+ __FILE__,__LINE__,info->device_name);
+
+ info->ri_chkcount = 0;
+ info->dsr_chkcount = 0;
+ info->dcd_chkcount = 0;
+ info->cts_chkcount = 0;
+}
+
+static void isr_timer(SLMP_INFO * info)
+{
+ unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
+
+ /* IER2<7..4> = timer<3..0> interrupt enables (0=disabled) */
+ write_reg(info, IER2, 0);
+
+ /* TMCS, Timer Control/Status Register
+ *
+ * 07 CMF, Compare match flag (read only) 1=match
+ * 06 ECMI, CMF Interrupt Enable: 0=disabled
+ * 05 Reserved, must be 0
+ * 04 TME, Timer Enable
+ * 03..00 Reserved, must be 0
+ *
+ * 0000 0000
+ */
+ write_reg(info, (unsigned char)(timer + TMCS), 0);
+
+ info->irq_occurred = true;
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s isr_timer()\n",
+ __FILE__,__LINE__,info->device_name);
+}
+
+static void isr_rxint(SLMP_INFO * info)
+{
+ struct tty_struct *tty = info->port.tty;
+ struct mgsl_icount *icount = &info->icount;
+ unsigned char status = read_reg(info, SR1) & info->ie1_value & (FLGD + IDLD + CDCD + BRKD);
+ unsigned char status2 = read_reg(info, SR2) & info->ie2_value & OVRN;
+
+ /* clear status bits */
+ if (status)
+ write_reg(info, SR1, status);
+
+ if (status2)
+ write_reg(info, SR2, status2);
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s isr_rxint status=%02X %02x\n",
+ __FILE__,__LINE__,info->device_name,status,status2);
+
+ if (info->params.mode == MGSL_MODE_ASYNC) {
+ if (status & BRKD) {
+ icount->brk++;
+
+ /* process break detection if tty control
+ * is not set to ignore it
+ */
+ if ( tty ) {
+ if (!(status & info->ignore_status_mask1)) {
+ if (info->read_status_mask1 & BRKD) {
+ tty_insert_flip_char(tty, 0, TTY_BREAK);
+ if (info->port.flags & ASYNC_SAK)
+ do_SAK(tty);
+ }
+ }
+ }
+ }
+ }
+ else {
+ if (status & (FLGD|IDLD)) {
+ if (status & FLGD)
+ info->icount.exithunt++;
+ else if (status & IDLD)
+ info->icount.rxidle++;
+ wake_up_interruptible(&info->event_wait_q);
+ }
+ }
+
+ if (status & CDCD) {
+ /* simulate a common modem status change interrupt
+ * for our handler
+ */
+ get_signals( info );
+ isr_io_pin(info,
+ MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD));
+ }
+}
+
+/*
+ * handle async rx data interrupts
+ */
+static void isr_rxrdy(SLMP_INFO * info)
+{
+ u16 status;
+ unsigned char DataByte;
+ struct tty_struct *tty = info->port.tty;
+ struct mgsl_icount *icount = &info->icount;
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s isr_rxrdy\n",
+ __FILE__,__LINE__,info->device_name);
+
+ while((status = read_reg(info,CST0)) & BIT0)
+ {
+ int flag = 0;
+ bool over = false;
+ DataByte = read_reg(info,TRB);
+
+ icount->rx++;
+
+ if ( status & (PE + FRME + OVRN) ) {
+ printk("%s(%d):%s rxerr=%04X\n",
+ __FILE__,__LINE__,info->device_name,status);
+
+ /* update error statistics */
+ if (status & PE)
+ icount->parity++;
+ else if (status & FRME)
+ icount->frame++;
+ else if (status & OVRN)
+ icount->overrun++;
+
+ /* discard char if tty control flags say so */
+ if (status & info->ignore_status_mask2)
+ continue;
+
+ status &= info->read_status_mask2;
+
+ if ( tty ) {
+ if (status & PE)
+ flag = TTY_PARITY;
+ else if (status & FRME)
+ flag = TTY_FRAME;
+ if (status & OVRN) {
+ /* Overrun is special, since it's
+ * reported immediately, and doesn't
+ * affect the current character
+ */
+ over = true;
+ }
+ }
+ } /* end of if (error) */
+
+ if ( tty ) {
+ tty_insert_flip_char(tty, DataByte, flag);
+ if (over)
+ tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+ }
+ }
+
+ if ( debug_level >= DEBUG_LEVEL_ISR ) {
+ printk("%s(%d):%s rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
+ __FILE__,__LINE__,info->device_name,
+ icount->rx,icount->brk,icount->parity,
+ icount->frame,icount->overrun);
+ }
+
+ if ( tty )
+ tty_flip_buffer_push(tty);
+}
+
+static void isr_txeom(SLMP_INFO * info, unsigned char status)
+{
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s isr_txeom status=%02x\n",
+ __FILE__,__LINE__,info->device_name,status);
+
+ write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
+ write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
+ write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
+
+ if (status & UDRN) {
+ write_reg(info, CMD, TXRESET);
+ write_reg(info, CMD, TXENABLE);
+ } else
+ write_reg(info, CMD, TXBUFCLR);
+
+ /* disable and clear tx interrupts */
+ info->ie0_value &= ~TXRDYE;
+ info->ie1_value &= ~(IDLE + UDRN);
+ write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
+ write_reg(info, SR1, (unsigned char)(UDRN + IDLE));
+
+ if ( info->tx_active ) {
+ if (info->params.mode != MGSL_MODE_ASYNC) {
+ if (status & UDRN)
+ info->icount.txunder++;
+ else if (status & IDLE)
+ info->icount.txok++;
+ }
+
+ info->tx_active = false;
+ info->tx_count = info->tx_put = info->tx_get = 0;
+
+ del_timer(&info->tx_timer);
+
+ if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done ) {
+ info->serial_signals &= ~SerialSignal_RTS;
+ info->drop_rts_on_tx_done = false;
+ set_signals(info);
+ }
+
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount)
+ hdlcdev_tx_done(info);
+ else
+#endif
+ {
+ if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
+ tx_stop(info);
+ return;
+ }
+ info->pending_bh |= BH_TRANSMIT;
+ }
+ }
+}
+
+
+/*
+ * handle tx status interrupts
+ */
+static void isr_txint(SLMP_INFO * info)
+{
+ unsigned char status = read_reg(info, SR1) & info->ie1_value & (UDRN + IDLE + CCTS);
+
+ /* clear status bits */
+ write_reg(info, SR1, status);
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s isr_txint status=%02x\n",
+ __FILE__,__LINE__,info->device_name,status);
+
+ if (status & (UDRN + IDLE))
+ isr_txeom(info, status);
+
+ if (status & CCTS) {
+ /* simulate a common modem status change interrupt
+ * for our handler
+ */
+ get_signals( info );
+ isr_io_pin(info,
+ MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS));
+
+ }
+}
+
+/*
+ * handle async tx data interrupts
+ */
+static void isr_txrdy(SLMP_INFO * info)
+{
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s isr_txrdy() tx_count=%d\n",
+ __FILE__,__LINE__,info->device_name,info->tx_count);
+
+ if (info->params.mode != MGSL_MODE_ASYNC) {
+ /* disable TXRDY IRQ, enable IDLE IRQ */
+ info->ie0_value &= ~TXRDYE;
+ info->ie1_value |= IDLE;
+ write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
+ return;
+ }
+
+ if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
+ tx_stop(info);
+ return;
+ }
+
+ if ( info->tx_count )
+ tx_load_fifo( info );
+ else {
+ info->tx_active = false;
+ info->ie0_value &= ~TXRDYE;
+ write_reg(info, IE0, info->ie0_value);
+ }
+
+ if (info->tx_count < WAKEUP_CHARS)
+ info->pending_bh |= BH_TRANSMIT;
+}
+
+static void isr_rxdmaok(SLMP_INFO * info)
+{
+ /* BIT7 = EOT (end of transfer)
+ * BIT6 = EOM (end of message/frame)
+ */
+ unsigned char status = read_reg(info,RXDMA + DSR) & 0xc0;
+
+ /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
+ write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s isr_rxdmaok(), status=%02x\n",
+ __FILE__,__LINE__,info->device_name,status);
+
+ info->pending_bh |= BH_RECEIVE;
+}
+
+static void isr_rxdmaerror(SLMP_INFO * info)
+{
+ /* BIT5 = BOF (buffer overflow)
+ * BIT4 = COF (counter overflow)
+ */
+ unsigned char status = read_reg(info,RXDMA + DSR) & 0x30;
+
+ /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
+ write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s isr_rxdmaerror(), status=%02x\n",
+ __FILE__,__LINE__,info->device_name,status);
+
+ info->rx_overflow = true;
+ info->pending_bh |= BH_RECEIVE;
+}
+
+static void isr_txdmaok(SLMP_INFO * info)
+{
+ unsigned char status_reg1 = read_reg(info, SR1);
+
+ write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
+ write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
+ write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s isr_txdmaok(), status=%02x\n",
+ __FILE__,__LINE__,info->device_name,status_reg1);
+
+ /* program TXRDY as FIFO empty flag, enable TXRDY IRQ */
+ write_reg16(info, TRC0, 0);
+ info->ie0_value |= TXRDYE;
+ write_reg(info, IE0, info->ie0_value);
+}
+
+static void isr_txdmaerror(SLMP_INFO * info)
+{
+ /* BIT5 = BOF (buffer overflow)
+ * BIT4 = COF (counter overflow)
+ */
+ unsigned char status = read_reg(info,TXDMA + DSR) & 0x30;
+
+ /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
+ write_reg(info, TXDMA + DSR, (unsigned char)(status | 1));
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s isr_txdmaerror(), status=%02x\n",
+ __FILE__,__LINE__,info->device_name,status);
+}
+
+/* handle input serial signal changes
+ */
+static void isr_io_pin( SLMP_INFO *info, u16 status )
+{
+ struct mgsl_icount *icount;
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):isr_io_pin status=%04X\n",
+ __FILE__,__LINE__,status);
+
+ if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED |
+ MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) {
+ icount = &info->icount;
+ /* update input line counters */
+ if (status & MISCSTATUS_RI_LATCHED) {
+ icount->rng++;
+ if ( status & SerialSignal_RI )
+ info->input_signal_events.ri_up++;
+ else
+ info->input_signal_events.ri_down++;
+ }
+ if (status & MISCSTATUS_DSR_LATCHED) {
+ icount->dsr++;
+ if ( status & SerialSignal_DSR )
+ info->input_signal_events.dsr_up++;
+ else
+ info->input_signal_events.dsr_down++;
+ }
+ if (status & MISCSTATUS_DCD_LATCHED) {
+ if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
+ info->ie1_value &= ~CDCD;
+ write_reg(info, IE1, info->ie1_value);
+ }
+ icount->dcd++;
+ if (status & SerialSignal_DCD) {
+ info->input_signal_events.dcd_up++;
+ } else
+ info->input_signal_events.dcd_down++;
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount) {
+ if (status & SerialSignal_DCD)
+ netif_carrier_on(info->netdev);
+ else
+ netif_carrier_off(info->netdev);
+ }
+#endif
+ }
+ if (status & MISCSTATUS_CTS_LATCHED)
+ {
+ if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
+ info->ie1_value &= ~CCTS;
+ write_reg(info, IE1, info->ie1_value);
+ }
+ icount->cts++;
+ if ( status & SerialSignal_CTS )
+ info->input_signal_events.cts_up++;
+ else
+ info->input_signal_events.cts_down++;
+ }
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+
+ if ( (info->port.flags & ASYNC_CHECK_CD) &&
+ (status & MISCSTATUS_DCD_LATCHED) ) {
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s CD now %s...", info->device_name,
+ (status & SerialSignal_DCD) ? "on" : "off");
+ if (status & SerialSignal_DCD)
+ wake_up_interruptible(&info->port.open_wait);
+ else {
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("doing serial hangup...");
+ if (info->port.tty)
+ tty_hangup(info->port.tty);
+ }
+ }
+
+ if ( (info->port.flags & ASYNC_CTS_FLOW) &&
+ (status & MISCSTATUS_CTS_LATCHED) ) {
+ if ( info->port.tty ) {
+ if (info->port.tty->hw_stopped) {
+ if (status & SerialSignal_CTS) {
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("CTS tx start...");
+ info->port.tty->hw_stopped = 0;
+ tx_start(info);
+ info->pending_bh |= BH_TRANSMIT;
+ return;
+ }
+ } else {
+ if (!(status & SerialSignal_CTS)) {
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("CTS tx stop...");
+ info->port.tty->hw_stopped = 1;
+ tx_stop(info);
+ }
+ }
+ }
+ }
+ }
+
+ info->pending_bh |= BH_STATUS;
+}
+
+/* Interrupt service routine entry point.
+ *
+ * Arguments:
+ * irq interrupt number that caused interrupt
+ * dev_id device ID supplied during interrupt registration
+ * regs interrupted processor context
+ */
+static irqreturn_t synclinkmp_interrupt(int dummy, void *dev_id)
+{
+ SLMP_INFO *info = dev_id;
+ unsigned char status, status0, status1=0;
+ unsigned char dmastatus, dmastatus0, dmastatus1=0;
+ unsigned char timerstatus0, timerstatus1=0;
+ unsigned char shift;
+ unsigned int i;
+ unsigned short tmp;
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk(KERN_DEBUG "%s(%d): synclinkmp_interrupt(%d)entry.\n",
+ __FILE__, __LINE__, info->irq_level);
+
+ spin_lock(&info->lock);
+
+ for(;;) {
+
+ /* get status for SCA0 (ports 0-1) */
+ tmp = read_reg16(info, ISR0); /* get ISR0 and ISR1 in one read */
+ status0 = (unsigned char)tmp;
+ dmastatus0 = (unsigned char)(tmp>>8);
+ timerstatus0 = read_reg(info, ISR2);
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk(KERN_DEBUG "%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n",
+ __FILE__, __LINE__, info->device_name,
+ status0, dmastatus0, timerstatus0);
+
+ if (info->port_count == 4) {
+ /* get status for SCA1 (ports 2-3) */
+ tmp = read_reg16(info->port_array[2], ISR0);
+ status1 = (unsigned char)tmp;
+ dmastatus1 = (unsigned char)(tmp>>8);
+ timerstatus1 = read_reg(info->port_array[2], ISR2);
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s status1=%02x, dmastatus1=%02x, timerstatus1=%02x\n",
+ __FILE__,__LINE__,info->device_name,
+ status1,dmastatus1,timerstatus1);
+ }
+
+ if (!status0 && !dmastatus0 && !timerstatus0 &&
+ !status1 && !dmastatus1 && !timerstatus1)
+ break;
+
+ for(i=0; i < info->port_count ; i++) {
+ if (info->port_array[i] == NULL)
+ continue;
+ if (i < 2) {
+ status = status0;
+ dmastatus = dmastatus0;
+ } else {
+ status = status1;
+ dmastatus = dmastatus1;
+ }
+
+ shift = i & 1 ? 4 :0;
+
+ if (status & BIT0 << shift)
+ isr_rxrdy(info->port_array[i]);
+ if (status & BIT1 << shift)
+ isr_txrdy(info->port_array[i]);
+ if (status & BIT2 << shift)
+ isr_rxint(info->port_array[i]);
+ if (status & BIT3 << shift)
+ isr_txint(info->port_array[i]);
+
+ if (dmastatus & BIT0 << shift)
+ isr_rxdmaerror(info->port_array[i]);
+ if (dmastatus & BIT1 << shift)
+ isr_rxdmaok(info->port_array[i]);
+ if (dmastatus & BIT2 << shift)
+ isr_txdmaerror(info->port_array[i]);
+ if (dmastatus & BIT3 << shift)
+ isr_txdmaok(info->port_array[i]);
+ }
+
+ if (timerstatus0 & (BIT5 | BIT4))
+ isr_timer(info->port_array[0]);
+ if (timerstatus0 & (BIT7 | BIT6))
+ isr_timer(info->port_array[1]);
+ if (timerstatus1 & (BIT5 | BIT4))
+ isr_timer(info->port_array[2]);
+ if (timerstatus1 & (BIT7 | BIT6))
+ isr_timer(info->port_array[3]);
+ }
+
+ for(i=0; i < info->port_count ; i++) {
+ SLMP_INFO * port = info->port_array[i];
+
+ /* Request bottom half processing if there's something
+ * for it to do and the bh is not already running.
+ *
+ * Note: startup adapter diags require interrupts.
+ * do not request bottom half processing if the
+ * device is not open in a normal mode.
+ */
+ if ( port && (port->port.count || port->netcount) &&
+ port->pending_bh && !port->bh_running &&
+ !port->bh_requested ) {
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk("%s(%d):%s queueing bh task.\n",
+ __FILE__,__LINE__,port->device_name);
+ schedule_work(&port->task);
+ port->bh_requested = true;
+ }
+ }
+
+ spin_unlock(&info->lock);
+
+ if ( debug_level >= DEBUG_LEVEL_ISR )
+ printk(KERN_DEBUG "%s(%d):synclinkmp_interrupt(%d)exit.\n",
+ __FILE__, __LINE__, info->irq_level);
+ return IRQ_HANDLED;
+}
+
+/* Initialize and start device.
+ */
+static int startup(SLMP_INFO * info)
+{
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk("%s(%d):%s tx_releaseup()\n",__FILE__,__LINE__,info->device_name);
+
+ if (info->port.flags & ASYNC_INITIALIZED)
+ return 0;
+
+ if (!info->tx_buf) {
+ info->tx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
+ if (!info->tx_buf) {
+ printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
+ __FILE__,__LINE__,info->device_name);
+ return -ENOMEM;
+ }
+ }
+
+ info->pending_bh = 0;
+
+ memset(&info->icount, 0, sizeof(info->icount));
+
+ /* program hardware for current parameters */
+ reset_port(info);
+
+ change_params(info);
+
+ mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10));
+
+ if (info->port.tty)
+ clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
+
+ info->port.flags |= ASYNC_INITIALIZED;
+
+ return 0;
+}
+
+/* Called by close() and hangup() to shutdown hardware
+ */
+static void shutdown(SLMP_INFO * info)
+{
+ unsigned long flags;
+
+ if (!(info->port.flags & ASYNC_INITIALIZED))
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s synclinkmp_shutdown()\n",
+ __FILE__,__LINE__, info->device_name );
+
+ /* clear status wait queue because status changes */
+ /* can't happen after shutting down the hardware */
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+
+ del_timer(&info->tx_timer);
+ del_timer(&info->status_timer);
+
+ kfree(info->tx_buf);
+ info->tx_buf = NULL;
+
+ spin_lock_irqsave(&info->lock,flags);
+
+ reset_port(info);
+
+ if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) {
+ info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
+ set_signals(info);
+ }
+
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ if (info->port.tty)
+ set_bit(TTY_IO_ERROR, &info->port.tty->flags);
+
+ info->port.flags &= ~ASYNC_INITIALIZED;
+}
+
+static void program_hw(SLMP_INFO *info)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+
+ rx_stop(info);
+ tx_stop(info);
+
+ info->tx_count = info->tx_put = info->tx_get = 0;
+
+ if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
+ hdlc_mode(info);
+ else
+ async_mode(info);
+
+ set_signals(info);
+
+ info->dcd_chkcount = 0;
+ info->cts_chkcount = 0;
+ info->ri_chkcount = 0;
+ info->dsr_chkcount = 0;
+
+ info->ie1_value |= (CDCD|CCTS);
+ write_reg(info, IE1, info->ie1_value);
+
+ get_signals(info);
+
+ if (info->netcount || (info->port.tty && info->port.tty->termios->c_cflag & CREAD) )
+ rx_start(info);
+
+ spin_unlock_irqrestore(&info->lock,flags);
+}
+
+/* Reconfigure adapter based on new parameters
+ */
+static void change_params(SLMP_INFO *info)
+{
+ unsigned cflag;
+ int bits_per_char;
+
+ if (!info->port.tty || !info->port.tty->termios)
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s change_params()\n",
+ __FILE__,__LINE__, info->device_name );
+
+ cflag = info->port.tty->termios->c_cflag;
+
+ /* if B0 rate (hangup) specified then negate DTR and RTS */
+ /* otherwise assert DTR and RTS */
+ if (cflag & CBAUD)
+ info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+ else
+ info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+
+ /* byte size and parity */
+
+ switch (cflag & CSIZE) {
+ case CS5: info->params.data_bits = 5; break;
+ case CS6: info->params.data_bits = 6; break;
+ case CS7: info->params.data_bits = 7; break;
+ case CS8: info->params.data_bits = 8; break;
+ /* Never happens, but GCC is too dumb to figure it out */
+ default: info->params.data_bits = 7; break;
+ }
+
+ if (cflag & CSTOPB)
+ info->params.stop_bits = 2;
+ else
+ info->params.stop_bits = 1;
+
+ info->params.parity = ASYNC_PARITY_NONE;
+ if (cflag & PARENB) {
+ if (cflag & PARODD)
+ info->params.parity = ASYNC_PARITY_ODD;
+ else
+ info->params.parity = ASYNC_PARITY_EVEN;
+#ifdef CMSPAR
+ if (cflag & CMSPAR)
+ info->params.parity = ASYNC_PARITY_SPACE;
+#endif
+ }
+
+ /* calculate number of jiffies to transmit a full
+ * FIFO (32 bytes) at specified data rate
+ */
+ bits_per_char = info->params.data_bits +
+ info->params.stop_bits + 1;
+
+ /* if port data rate is set to 460800 or less then
+ * allow tty settings to override, otherwise keep the
+ * current data rate.
+ */
+ if (info->params.data_rate <= 460800) {
+ info->params.data_rate = tty_get_baud_rate(info->port.tty);
+ }
+
+ if ( info->params.data_rate ) {
+ info->timeout = (32*HZ*bits_per_char) /
+ info->params.data_rate;
+ }
+ info->timeout += HZ/50; /* Add .02 seconds of slop */
+
+ if (cflag & CRTSCTS)
+ info->port.flags |= ASYNC_CTS_FLOW;
+ else
+ info->port.flags &= ~ASYNC_CTS_FLOW;
+
+ if (cflag & CLOCAL)
+ info->port.flags &= ~ASYNC_CHECK_CD;
+ else
+ info->port.flags |= ASYNC_CHECK_CD;
+
+ /* process tty input control flags */
+
+ info->read_status_mask2 = OVRN;
+ if (I_INPCK(info->port.tty))
+ info->read_status_mask2 |= PE | FRME;
+ if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
+ info->read_status_mask1 |= BRKD;
+ if (I_IGNPAR(info->port.tty))
+ info->ignore_status_mask2 |= PE | FRME;
+ if (I_IGNBRK(info->port.tty)) {
+ info->ignore_status_mask1 |= BRKD;
+ /* If ignoring parity and break indicators, ignore
+ * overruns too. (For real raw support).
+ */
+ if (I_IGNPAR(info->port.tty))
+ info->ignore_status_mask2 |= OVRN;
+ }
+
+ program_hw(info);
+}
+
+static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount)
+{
+ int err;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s get_params()\n",
+ __FILE__,__LINE__, info->device_name);
+
+ if (!user_icount) {
+ memset(&info->icount, 0, sizeof(info->icount));
+ } else {
+ mutex_lock(&info->port.mutex);
+ COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
+ mutex_unlock(&info->port.mutex);
+ if (err)
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params)
+{
+ int err;
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s get_params()\n",
+ __FILE__,__LINE__, info->device_name);
+
+ mutex_lock(&info->port.mutex);
+ COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
+ mutex_unlock(&info->port.mutex);
+ if (err) {
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):%s get_params() user buffer copy failed\n",
+ __FILE__,__LINE__,info->device_name);
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params)
+{
+ unsigned long flags;
+ MGSL_PARAMS tmp_params;
+ int err;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s set_params\n",
+ __FILE__,__LINE__,info->device_name );
+ COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
+ if (err) {
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):%s set_params() user buffer copy failed\n",
+ __FILE__,__LINE__,info->device_name);
+ return -EFAULT;
+ }
+
+ mutex_lock(&info->port.mutex);
+ spin_lock_irqsave(&info->lock,flags);
+ memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ change_params(info);
+ mutex_unlock(&info->port.mutex);
+
+ return 0;
+}
+
+static int get_txidle(SLMP_INFO * info, int __user *idle_mode)
+{
+ int err;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s get_txidle()=%d\n",
+ __FILE__,__LINE__, info->device_name, info->idle_mode);
+
+ COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
+ if (err) {
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):%s get_txidle() user buffer copy failed\n",
+ __FILE__,__LINE__,info->device_name);
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int set_txidle(SLMP_INFO * info, int idle_mode)
+{
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s set_txidle(%d)\n",
+ __FILE__,__LINE__,info->device_name, idle_mode );
+
+ spin_lock_irqsave(&info->lock,flags);
+ info->idle_mode = idle_mode;
+ tx_set_idle( info );
+ spin_unlock_irqrestore(&info->lock,flags);
+ return 0;
+}
+
+static int tx_enable(SLMP_INFO * info, int enable)
+{
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s tx_enable(%d)\n",
+ __FILE__,__LINE__,info->device_name, enable);
+
+ spin_lock_irqsave(&info->lock,flags);
+ if ( enable ) {
+ if ( !info->tx_enabled ) {
+ tx_start(info);
+ }
+ } else {
+ if ( info->tx_enabled )
+ tx_stop(info);
+ }
+ spin_unlock_irqrestore(&info->lock,flags);
+ return 0;
+}
+
+/* abort send HDLC frame
+ */
+static int tx_abort(SLMP_INFO * info)
+{
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s tx_abort()\n",
+ __FILE__,__LINE__,info->device_name);
+
+ spin_lock_irqsave(&info->lock,flags);
+ if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) {
+ info->ie1_value &= ~UDRN;
+ info->ie1_value |= IDLE;
+ write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
+ write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
+
+ write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
+ write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
+
+ write_reg(info, CMD, TXABORT);
+ }
+ spin_unlock_irqrestore(&info->lock,flags);
+ return 0;
+}
+
+static int rx_enable(SLMP_INFO * info, int enable)
+{
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s rx_enable(%d)\n",
+ __FILE__,__LINE__,info->device_name,enable);
+
+ spin_lock_irqsave(&info->lock,flags);
+ if ( enable ) {
+ if ( !info->rx_enabled )
+ rx_start(info);
+ } else {
+ if ( info->rx_enabled )
+ rx_stop(info);
+ }
+ spin_unlock_irqrestore(&info->lock,flags);
+ return 0;
+}
+
+/* wait for specified event to occur
+ */
+static int wait_mgsl_event(SLMP_INFO * info, int __user *mask_ptr)
+{
+ unsigned long flags;
+ int s;
+ int rc=0;
+ struct mgsl_icount cprev, cnow;
+ int events;
+ int mask;
+ struct _input_signal_events oldsigs, newsigs;
+ DECLARE_WAITQUEUE(wait, current);
+
+ COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
+ if (rc) {
+ return -EFAULT;
+ }
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s wait_mgsl_event(%d)\n",
+ __FILE__,__LINE__,info->device_name,mask);
+
+ spin_lock_irqsave(&info->lock,flags);
+
+ /* return immediately if state matches requested events */
+ get_signals(info);
+ s = info->serial_signals;
+
+ events = mask &
+ ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
+ ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
+ ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
+ ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
+ if (events) {
+ spin_unlock_irqrestore(&info->lock,flags);
+ goto exit;
+ }
+
+ /* save current irq counts */
+ cprev = info->icount;
+ oldsigs = info->input_signal_events;
+
+ /* enable hunt and idle irqs if needed */
+ if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) {
+ unsigned char oldval = info->ie1_value;
+ unsigned char newval = oldval +
+ (mask & MgslEvent_ExitHuntMode ? FLGD:0) +
+ (mask & MgslEvent_IdleReceived ? IDLD:0);
+ if ( oldval != newval ) {
+ info->ie1_value = newval;
+ write_reg(info, IE1, info->ie1_value);
+ }
+ }
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&info->event_wait_q, &wait);
+
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ for(;;) {
+ schedule();
+ if (signal_pending(current)) {
+ rc = -ERESTARTSYS;
+ break;
+ }
+
+ /* get current irq counts */
+ spin_lock_irqsave(&info->lock,flags);
+ cnow = info->icount;
+ newsigs = info->input_signal_events;
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ /* if no change, wait aborted for some reason */
+ if (newsigs.dsr_up == oldsigs.dsr_up &&
+ newsigs.dsr_down == oldsigs.dsr_down &&
+ newsigs.dcd_up == oldsigs.dcd_up &&
+ newsigs.dcd_down == oldsigs.dcd_down &&
+ newsigs.cts_up == oldsigs.cts_up &&
+ newsigs.cts_down == oldsigs.cts_down &&
+ newsigs.ri_up == oldsigs.ri_up &&
+ newsigs.ri_down == oldsigs.ri_down &&
+ cnow.exithunt == cprev.exithunt &&
+ cnow.rxidle == cprev.rxidle) {
+ rc = -EIO;
+ break;
+ }
+
+ events = mask &
+ ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
+ (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
+ (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
+ (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
+ (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
+ (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
+ (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
+ (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
+ (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
+ (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
+ if (events)
+ break;
+
+ cprev = cnow;
+ oldsigs = newsigs;
+ }
+
+ remove_wait_queue(&info->event_wait_q, &wait);
+ set_current_state(TASK_RUNNING);
+
+
+ if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
+ spin_lock_irqsave(&info->lock,flags);
+ if (!waitqueue_active(&info->event_wait_q)) {
+ /* disable enable exit hunt mode/idle rcvd IRQs */
+ info->ie1_value &= ~(FLGD|IDLD);
+ write_reg(info, IE1, info->ie1_value);
+ }
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+exit:
+ if ( rc == 0 )
+ PUT_USER(rc, events, mask_ptr);
+
+ return rc;
+}
+
+static int modem_input_wait(SLMP_INFO *info,int arg)
+{
+ unsigned long flags;
+ int rc;
+ struct mgsl_icount cprev, cnow;
+ DECLARE_WAITQUEUE(wait, current);
+
+ /* save current irq counts */
+ spin_lock_irqsave(&info->lock,flags);
+ cprev = info->icount;
+ add_wait_queue(&info->status_event_wait_q, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ for(;;) {
+ schedule();
+ if (signal_pending(current)) {
+ rc = -ERESTARTSYS;
+ break;
+ }
+
+ /* get new irq counts */
+ spin_lock_irqsave(&info->lock,flags);
+ cnow = info->icount;
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ /* if no change, wait aborted for some reason */
+ if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
+ cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
+ rc = -EIO;
+ break;
+ }
+
+ /* check for change in caller specified modem input */
+ if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
+ (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
+ (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
+ (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
+ rc = 0;
+ break;
+ }
+
+ cprev = cnow;
+ }
+ remove_wait_queue(&info->status_event_wait_q, &wait);
+ set_current_state(TASK_RUNNING);
+ return rc;
+}
+
+/* return the state of the serial control and status signals
+ */
+static int tiocmget(struct tty_struct *tty)
+{
+ SLMP_INFO *info = tty->driver_data;
+ unsigned int result;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
+ ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
+ ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
+ ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
+ ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
+ ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s tiocmget() value=%08X\n",
+ __FILE__,__LINE__, info->device_name, result );
+ return result;
+}
+
+/* set modem control signals (DTR/RTS)
+ */
+static int tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ SLMP_INFO *info = tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s tiocmset(%x,%x)\n",
+ __FILE__,__LINE__,info->device_name, set, clear);
+
+ if (set & TIOCM_RTS)
+ info->serial_signals |= SerialSignal_RTS;
+ if (set & TIOCM_DTR)
+ info->serial_signals |= SerialSignal_DTR;
+ if (clear & TIOCM_RTS)
+ info->serial_signals &= ~SerialSignal_RTS;
+ if (clear & TIOCM_DTR)
+ info->serial_signals &= ~SerialSignal_DTR;
+
+ spin_lock_irqsave(&info->lock,flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ return 0;
+}
+
+static int carrier_raised(struct tty_port *port)
+{
+ SLMP_INFO *info = container_of(port, SLMP_INFO, port);
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
+}
+
+static void dtr_rts(struct tty_port *port, int on)
+{
+ SLMP_INFO *info = container_of(port, SLMP_INFO, port);
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+ if (on)
+ info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+ else
+ info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+}
+
+/* Block the current process until the specified port is ready to open.
+ */
+static int block_til_ready(struct tty_struct *tty, struct file *filp,
+ SLMP_INFO *info)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ int retval;
+ bool do_clocal = false;
+ bool extra_count = false;
+ unsigned long flags;
+ int cd;
+ struct tty_port *port = &info->port;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s block_til_ready()\n",
+ __FILE__,__LINE__, tty->driver->name );
+
+ if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
+ /* nonblock mode is set or port is not enabled */
+ /* just verify that callout device is not active */
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+ }
+
+ if (tty->termios->c_cflag & CLOCAL)
+ do_clocal = true;
+
+ /* Wait for carrier detect and the line to become
+ * free (i.e., not in use by the callout). While we are in
+ * this loop, port->count is dropped by one, so that
+ * close() knows when to free things. We restore it upon
+ * exit, either normal or abnormal.
+ */
+
+ retval = 0;
+ add_wait_queue(&port->open_wait, &wait);
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s block_til_ready() before block, count=%d\n",
+ __FILE__,__LINE__, tty->driver->name, port->count );
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (!tty_hung_up_p(filp)) {
+ extra_count = true;
+ port->count--;
+ }
+ spin_unlock_irqrestore(&info->lock, flags);
+ port->blocked_open++;
+
+ while (1) {
+ if (tty->termios->c_cflag & CBAUD)
+ tty_port_raise_dtr_rts(port);
+
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
+ retval = (port->flags & ASYNC_HUP_NOTIFY) ?
+ -EAGAIN : -ERESTARTSYS;
+ break;
+ }
+
+ cd = tty_port_carrier_raised(port);
+
+ if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd))
+ break;
+
+ if (signal_pending(current)) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s block_til_ready() count=%d\n",
+ __FILE__,__LINE__, tty->driver->name, port->count );
+
+ tty_unlock();
+ schedule();
+ tty_lock();
+ }
+
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&port->open_wait, &wait);
+
+ if (extra_count)
+ port->count++;
+ port->blocked_open--;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s block_til_ready() after, count=%d\n",
+ __FILE__,__LINE__, tty->driver->name, port->count );
+
+ if (!retval)
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+
+ return retval;
+}
+
+static int alloc_dma_bufs(SLMP_INFO *info)
+{
+ unsigned short BuffersPerFrame;
+ unsigned short BufferCount;
+
+ // Force allocation to start at 64K boundary for each port.
+ // This is necessary because *all* buffer descriptors for a port
+ // *must* be in the same 64K block. All descriptors on a port
+ // share a common 'base' address (upper 8 bits of 24 bits) programmed
+ // into the CBP register.
+ info->port_array[0]->last_mem_alloc = (SCA_MEM_SIZE/4) * info->port_num;
+
+ /* Calculate the number of DMA buffers necessary to hold the */
+ /* largest allowable frame size. Note: If the max frame size is */
+ /* not an even multiple of the DMA buffer size then we need to */
+ /* round the buffer count per frame up one. */
+
+ BuffersPerFrame = (unsigned short)(info->max_frame_size/SCABUFSIZE);
+ if ( info->max_frame_size % SCABUFSIZE )
+ BuffersPerFrame++;
+
+ /* calculate total number of data buffers (SCABUFSIZE) possible
+ * in one ports memory (SCA_MEM_SIZE/4) after allocating memory
+ * for the descriptor list (BUFFERLISTSIZE).
+ */
+ BufferCount = (SCA_MEM_SIZE/4 - BUFFERLISTSIZE)/SCABUFSIZE;
+
+ /* limit number of buffers to maximum amount of descriptors */
+ if (BufferCount > BUFFERLISTSIZE/sizeof(SCADESC))
+ BufferCount = BUFFERLISTSIZE/sizeof(SCADESC);
+
+ /* use enough buffers to transmit one max size frame */
+ info->tx_buf_count = BuffersPerFrame + 1;
+
+ /* never use more than half the available buffers for transmit */
+ if (info->tx_buf_count > (BufferCount/2))
+ info->tx_buf_count = BufferCount/2;
+
+ if (info->tx_buf_count > SCAMAXDESC)
+ info->tx_buf_count = SCAMAXDESC;
+
+ /* use remaining buffers for receive */
+ info->rx_buf_count = BufferCount - info->tx_buf_count;
+
+ if (info->rx_buf_count > SCAMAXDESC)
+ info->rx_buf_count = SCAMAXDESC;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk("%s(%d):%s Allocating %d TX and %d RX DMA buffers.\n",
+ __FILE__,__LINE__, info->device_name,
+ info->tx_buf_count,info->rx_buf_count);
+
+ if ( alloc_buf_list( info ) < 0 ||
+ alloc_frame_bufs(info,
+ info->rx_buf_list,
+ info->rx_buf_list_ex,
+ info->rx_buf_count) < 0 ||
+ alloc_frame_bufs(info,
+ info->tx_buf_list,
+ info->tx_buf_list_ex,
+ info->tx_buf_count) < 0 ||
+ alloc_tmp_rx_buf(info) < 0 ) {
+ printk("%s(%d):%s Can't allocate DMA buffer memory\n",
+ __FILE__,__LINE__, info->device_name);
+ return -ENOMEM;
+ }
+
+ rx_reset_buffers( info );
+
+ return 0;
+}
+
+/* Allocate DMA buffers for the transmit and receive descriptor lists.
+ */
+static int alloc_buf_list(SLMP_INFO *info)
+{
+ unsigned int i;
+
+ /* build list in adapter shared memory */
+ info->buffer_list = info->memory_base + info->port_array[0]->last_mem_alloc;
+ info->buffer_list_phys = info->port_array[0]->last_mem_alloc;
+ info->port_array[0]->last_mem_alloc += BUFFERLISTSIZE;
+
+ memset(info->buffer_list, 0, BUFFERLISTSIZE);
+
+ /* Save virtual address pointers to the receive and */
+ /* transmit buffer lists. (Receive 1st). These pointers will */
+ /* be used by the processor to access the lists. */
+ info->rx_buf_list = (SCADESC *)info->buffer_list;
+
+ info->tx_buf_list = (SCADESC *)info->buffer_list;
+ info->tx_buf_list += info->rx_buf_count;
+
+ /* Build links for circular buffer entry lists (tx and rx)
+ *
+ * Note: links are physical addresses read by the SCA device
+ * to determine the next buffer entry to use.
+ */
+
+ for ( i = 0; i < info->rx_buf_count; i++ ) {
+ /* calculate and store physical address of this buffer entry */
+ info->rx_buf_list_ex[i].phys_entry =
+ info->buffer_list_phys + (i * sizeof(SCABUFSIZE));
+
+ /* calculate and store physical address of */
+ /* next entry in cirular list of entries */
+ info->rx_buf_list[i].next = info->buffer_list_phys;
+ if ( i < info->rx_buf_count - 1 )
+ info->rx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
+
+ info->rx_buf_list[i].length = SCABUFSIZE;
+ }
+
+ for ( i = 0; i < info->tx_buf_count; i++ ) {
+ /* calculate and store physical address of this buffer entry */
+ info->tx_buf_list_ex[i].phys_entry = info->buffer_list_phys +
+ ((info->rx_buf_count + i) * sizeof(SCADESC));
+
+ /* calculate and store physical address of */
+ /* next entry in cirular list of entries */
+
+ info->tx_buf_list[i].next = info->buffer_list_phys +
+ info->rx_buf_count * sizeof(SCADESC);
+
+ if ( i < info->tx_buf_count - 1 )
+ info->tx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
+ }
+
+ return 0;
+}
+
+/* Allocate the frame DMA buffers used by the specified buffer list.
+ */
+static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *buf_list,SCADESC_EX *buf_list_ex,int count)
+{
+ int i;
+ unsigned long phys_addr;
+
+ for ( i = 0; i < count; i++ ) {
+ buf_list_ex[i].virt_addr = info->memory_base + info->port_array[0]->last_mem_alloc;
+ phys_addr = info->port_array[0]->last_mem_alloc;
+ info->port_array[0]->last_mem_alloc += SCABUFSIZE;
+
+ buf_list[i].buf_ptr = (unsigned short)phys_addr;
+ buf_list[i].buf_base = (unsigned char)(phys_addr >> 16);
+ }
+
+ return 0;
+}
+
+static void free_dma_bufs(SLMP_INFO *info)
+{
+ info->buffer_list = NULL;
+ info->rx_buf_list = NULL;
+ info->tx_buf_list = NULL;
+}
+
+/* allocate buffer large enough to hold max_frame_size.
+ * This buffer is used to pass an assembled frame to the line discipline.
+ */
+static int alloc_tmp_rx_buf(SLMP_INFO *info)
+{
+ info->tmp_rx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
+ if (info->tmp_rx_buf == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+static void free_tmp_rx_buf(SLMP_INFO *info)
+{
+ kfree(info->tmp_rx_buf);
+ info->tmp_rx_buf = NULL;
+}
+
+static int claim_resources(SLMP_INFO *info)
+{
+ if (request_mem_region(info->phys_memory_base,SCA_MEM_SIZE,"synclinkmp") == NULL) {
+ printk( "%s(%d):%s mem addr conflict, Addr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_memory_base);
+ info->init_error = DiagStatus_AddressConflict;
+ goto errout;
+ }
+ else
+ info->shared_mem_requested = true;
+
+ if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclinkmp") == NULL) {
+ printk( "%s(%d):%s lcr mem addr conflict, Addr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_lcr_base);
+ info->init_error = DiagStatus_AddressConflict;
+ goto errout;
+ }
+ else
+ info->lcr_mem_requested = true;
+
+ if (request_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE,"synclinkmp") == NULL) {
+ printk( "%s(%d):%s sca mem addr conflict, Addr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_sca_base);
+ info->init_error = DiagStatus_AddressConflict;
+ goto errout;
+ }
+ else
+ info->sca_base_requested = true;
+
+ if (request_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE,"synclinkmp") == NULL) {
+ printk( "%s(%d):%s stat/ctrl mem addr conflict, Addr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_statctrl_base);
+ info->init_error = DiagStatus_AddressConflict;
+ goto errout;
+ }
+ else
+ info->sca_statctrl_requested = true;
+
+ info->memory_base = ioremap_nocache(info->phys_memory_base,
+ SCA_MEM_SIZE);
+ if (!info->memory_base) {
+ printk( "%s(%d):%s Cant map shared memory, MemAddr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_memory_base );
+ info->init_error = DiagStatus_CantAssignPciResources;
+ goto errout;
+ }
+
+ info->lcr_base = ioremap_nocache(info->phys_lcr_base, PAGE_SIZE);
+ if (!info->lcr_base) {
+ printk( "%s(%d):%s Cant map LCR memory, MemAddr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_lcr_base );
+ info->init_error = DiagStatus_CantAssignPciResources;
+ goto errout;
+ }
+ info->lcr_base += info->lcr_offset;
+
+ info->sca_base = ioremap_nocache(info->phys_sca_base, PAGE_SIZE);
+ if (!info->sca_base) {
+ printk( "%s(%d):%s Cant map SCA memory, MemAddr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_sca_base );
+ info->init_error = DiagStatus_CantAssignPciResources;
+ goto errout;
+ }
+ info->sca_base += info->sca_offset;
+
+ info->statctrl_base = ioremap_nocache(info->phys_statctrl_base,
+ PAGE_SIZE);
+ if (!info->statctrl_base) {
+ printk( "%s(%d):%s Cant map SCA Status/Control memory, MemAddr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_statctrl_base );
+ info->init_error = DiagStatus_CantAssignPciResources;
+ goto errout;
+ }
+ info->statctrl_base += info->statctrl_offset;
+
+ if ( !memory_test(info) ) {
+ printk( "%s(%d):Shared Memory Test failed for device %s MemAddr=%08X\n",
+ __FILE__,__LINE__,info->device_name, info->phys_memory_base );
+ info->init_error = DiagStatus_MemoryError;
+ goto errout;
+ }
+
+ return 0;
+
+errout:
+ release_resources( info );
+ return -ENODEV;
+}
+
+static void release_resources(SLMP_INFO *info)
+{
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):%s release_resources() entry\n",
+ __FILE__,__LINE__,info->device_name );
+
+ if ( info->irq_requested ) {
+ free_irq(info->irq_level, info);
+ info->irq_requested = false;
+ }
+
+ if ( info->shared_mem_requested ) {
+ release_mem_region(info->phys_memory_base,SCA_MEM_SIZE);
+ info->shared_mem_requested = false;
+ }
+ if ( info->lcr_mem_requested ) {
+ release_mem_region(info->phys_lcr_base + info->lcr_offset,128);
+ info->lcr_mem_requested = false;
+ }
+ if ( info->sca_base_requested ) {
+ release_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE);
+ info->sca_base_requested = false;
+ }
+ if ( info->sca_statctrl_requested ) {
+ release_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE);
+ info->sca_statctrl_requested = false;
+ }
+
+ if (info->memory_base){
+ iounmap(info->memory_base);
+ info->memory_base = NULL;
+ }
+
+ if (info->sca_base) {
+ iounmap(info->sca_base - info->sca_offset);
+ info->sca_base=NULL;
+ }
+
+ if (info->statctrl_base) {
+ iounmap(info->statctrl_base - info->statctrl_offset);
+ info->statctrl_base=NULL;
+ }
+
+ if (info->lcr_base){
+ iounmap(info->lcr_base - info->lcr_offset);
+ info->lcr_base = NULL;
+ }
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):%s release_resources() exit\n",
+ __FILE__,__LINE__,info->device_name );
+}
+
+/* Add the specified device instance data structure to the
+ * global linked list of devices and increment the device count.
+ */
+static void add_device(SLMP_INFO *info)
+{
+ info->next_device = NULL;
+ info->line = synclinkmp_device_count;
+ sprintf(info->device_name,"ttySLM%dp%d",info->adapter_num,info->port_num);
+
+ if (info->line < MAX_DEVICES) {
+ if (maxframe[info->line])
+ info->max_frame_size = maxframe[info->line];
+ }
+
+ synclinkmp_device_count++;
+
+ if ( !synclinkmp_device_list )
+ synclinkmp_device_list = info;
+ else {
+ SLMP_INFO *current_dev = synclinkmp_device_list;
+ while( current_dev->next_device )
+ current_dev = current_dev->next_device;
+ current_dev->next_device = info;
+ }
+
+ if ( info->max_frame_size < 4096 )
+ info->max_frame_size = 4096;
+ else if ( info->max_frame_size > 65535 )
+ info->max_frame_size = 65535;
+
+ printk( "SyncLink MultiPort %s: "
+ "Mem=(%08x %08X %08x %08X) IRQ=%d MaxFrameSize=%u\n",
+ info->device_name,
+ info->phys_sca_base,
+ info->phys_memory_base,
+ info->phys_statctrl_base,
+ info->phys_lcr_base,
+ info->irq_level,
+ info->max_frame_size );
+
+#if SYNCLINK_GENERIC_HDLC
+ hdlcdev_init(info);
+#endif
+}
+
+static const struct tty_port_operations port_ops = {
+ .carrier_raised = carrier_raised,
+ .dtr_rts = dtr_rts,
+};
+
+/* Allocate and initialize a device instance structure
+ *
+ * Return Value: pointer to SLMP_INFO if success, otherwise NULL
+ */
+static SLMP_INFO *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev)
+{
+ SLMP_INFO *info;
+
+ info = kzalloc(sizeof(SLMP_INFO),
+ GFP_KERNEL);
+
+ if (!info) {
+ printk("%s(%d) Error can't allocate device instance data for adapter %d, port %d\n",
+ __FILE__,__LINE__, adapter_num, port_num);
+ } else {
+ tty_port_init(&info->port);
+ info->port.ops = &port_ops;
+ info->magic = MGSL_MAGIC;
+ INIT_WORK(&info->task, bh_handler);
+ info->max_frame_size = 4096;
+ info->port.close_delay = 5*HZ/10;
+ info->port.closing_wait = 30*HZ;
+ init_waitqueue_head(&info->status_event_wait_q);
+ init_waitqueue_head(&info->event_wait_q);
+ spin_lock_init(&info->netlock);
+ memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
+ info->idle_mode = HDLC_TXIDLE_FLAGS;
+ info->adapter_num = adapter_num;
+ info->port_num = port_num;
+
+ /* Copy configuration info to device instance data */
+ info->irq_level = pdev->irq;
+ info->phys_lcr_base = pci_resource_start(pdev,0);
+ info->phys_sca_base = pci_resource_start(pdev,2);
+ info->phys_memory_base = pci_resource_start(pdev,3);
+ info->phys_statctrl_base = pci_resource_start(pdev,4);
+
+ /* Because veremap only works on page boundaries we must map
+ * a larger area than is actually implemented for the LCR
+ * memory range. We map a full page starting at the page boundary.
+ */
+ info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1);
+ info->phys_lcr_base &= ~(PAGE_SIZE-1);
+
+ info->sca_offset = info->phys_sca_base & (PAGE_SIZE-1);
+ info->phys_sca_base &= ~(PAGE_SIZE-1);
+
+ info->statctrl_offset = info->phys_statctrl_base & (PAGE_SIZE-1);
+ info->phys_statctrl_base &= ~(PAGE_SIZE-1);
+
+ info->bus_type = MGSL_BUS_TYPE_PCI;
+ info->irq_flags = IRQF_SHARED;
+
+ setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info);
+ setup_timer(&info->status_timer, status_timeout,
+ (unsigned long)info);
+
+ /* Store the PCI9050 misc control register value because a flaw
+ * in the PCI9050 prevents LCR registers from being read if
+ * BIOS assigns an LCR base address with bit 7 set.
+ *
+ * Only the misc control register is accessed for which only
+ * write access is needed, so set an initial value and change
+ * bits to the device instance data as we write the value
+ * to the actual misc control register.
+ */
+ info->misc_ctrl_value = 0x087e4546;
+
+ /* initial port state is unknown - if startup errors
+ * occur, init_error will be set to indicate the
+ * problem. Once the port is fully initialized,
+ * this value will be set to 0 to indicate the
+ * port is available.
+ */
+ info->init_error = -1;
+ }
+
+ return info;
+}
+
+static void device_init(int adapter_num, struct pci_dev *pdev)
+{
+ SLMP_INFO *port_array[SCA_MAX_PORTS];
+ int port;
+
+ /* allocate device instances for up to SCA_MAX_PORTS devices */
+ for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
+ port_array[port] = alloc_dev(adapter_num,port,pdev);
+ if( port_array[port] == NULL ) {
+ for ( --port; port >= 0; --port )
+ kfree(port_array[port]);
+ return;
+ }
+ }
+
+ /* give copy of port_array to all ports and add to device list */
+ for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
+ memcpy(port_array[port]->port_array,port_array,sizeof(port_array));
+ add_device( port_array[port] );
+ spin_lock_init(&port_array[port]->lock);
+ }
+
+ /* Allocate and claim adapter resources */
+ if ( !claim_resources(port_array[0]) ) {
+
+ alloc_dma_bufs(port_array[0]);
+
+ /* copy resource information from first port to others */
+ for ( port = 1; port < SCA_MAX_PORTS; ++port ) {
+ port_array[port]->lock = port_array[0]->lock;
+ port_array[port]->irq_level = port_array[0]->irq_level;
+ port_array[port]->memory_base = port_array[0]->memory_base;
+ port_array[port]->sca_base = port_array[0]->sca_base;
+ port_array[port]->statctrl_base = port_array[0]->statctrl_base;
+ port_array[port]->lcr_base = port_array[0]->lcr_base;
+ alloc_dma_bufs(port_array[port]);
+ }
+
+ if ( request_irq(port_array[0]->irq_level,
+ synclinkmp_interrupt,
+ port_array[0]->irq_flags,
+ port_array[0]->device_name,
+ port_array[0]) < 0 ) {
+ printk( "%s(%d):%s Cant request interrupt, IRQ=%d\n",
+ __FILE__,__LINE__,
+ port_array[0]->device_name,
+ port_array[0]->irq_level );
+ }
+ else {
+ port_array[0]->irq_requested = true;
+ adapter_test(port_array[0]);
+ }
+ }
+}
+
+static const struct tty_operations ops = {
+ .open = open,
+ .close = close,
+ .write = write,
+ .put_char = put_char,
+ .flush_chars = flush_chars,
+ .write_room = write_room,
+ .chars_in_buffer = chars_in_buffer,
+ .flush_buffer = flush_buffer,
+ .ioctl = ioctl,
+ .throttle = throttle,
+ .unthrottle = unthrottle,
+ .send_xchar = send_xchar,
+ .break_ctl = set_break,
+ .wait_until_sent = wait_until_sent,
+ .set_termios = set_termios,
+ .stop = tx_hold,
+ .start = tx_release,
+ .hangup = hangup,
+ .tiocmget = tiocmget,
+ .tiocmset = tiocmset,
+ .get_icount = get_icount,
+ .proc_fops = &synclinkmp_proc_fops,
+};
+
+
+static void synclinkmp_cleanup(void)
+{
+ int rc;
+ SLMP_INFO *info;
+ SLMP_INFO *tmp;
+
+ printk("Unloading %s %s\n", driver_name, driver_version);
+
+ if (serial_driver) {
+ if ((rc = tty_unregister_driver(serial_driver)))
+ printk("%s(%d) failed to unregister tty driver err=%d\n",
+ __FILE__,__LINE__,rc);
+ put_tty_driver(serial_driver);
+ }
+
+ /* reset devices */
+ info = synclinkmp_device_list;
+ while(info) {
+ reset_port(info);
+ info = info->next_device;
+ }
+
+ /* release devices */
+ info = synclinkmp_device_list;
+ while(info) {
+#if SYNCLINK_GENERIC_HDLC
+ hdlcdev_exit(info);
+#endif
+ free_dma_bufs(info);
+ free_tmp_rx_buf(info);
+ if ( info->port_num == 0 ) {
+ if (info->sca_base)
+ write_reg(info, LPR, 1); /* set low power mode */
+ release_resources(info);
+ }
+ tmp = info;
+ info = info->next_device;
+ kfree(tmp);
+ }
+
+ pci_unregister_driver(&synclinkmp_pci_driver);
+}
+
+/* Driver initialization entry point.
+ */
+
+static int __init synclinkmp_init(void)
+{
+ int rc;
+
+ if (break_on_load) {
+ synclinkmp_get_text_ptr();
+ BREAKPOINT();
+ }
+
+ printk("%s %s\n", driver_name, driver_version);
+
+ if ((rc = pci_register_driver(&synclinkmp_pci_driver)) < 0) {
+ printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc);
+ return rc;
+ }
+
+ serial_driver = alloc_tty_driver(128);
+ if (!serial_driver) {
+ rc = -ENOMEM;
+ goto error;
+ }
+
+ /* Initialize the tty_driver structure */
+
+ serial_driver->owner = THIS_MODULE;
+ serial_driver->driver_name = "synclinkmp";
+ serial_driver->name = "ttySLM";
+ serial_driver->major = ttymajor;
+ serial_driver->minor_start = 64;
+ serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ serial_driver->subtype = SERIAL_TYPE_NORMAL;
+ serial_driver->init_termios = tty_std_termios;
+ serial_driver->init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ serial_driver->init_termios.c_ispeed = 9600;
+ serial_driver->init_termios.c_ospeed = 9600;
+ serial_driver->flags = TTY_DRIVER_REAL_RAW;
+ tty_set_operations(serial_driver, &ops);
+ if ((rc = tty_register_driver(serial_driver)) < 0) {
+ printk("%s(%d):Couldn't register serial driver\n",
+ __FILE__,__LINE__);
+ put_tty_driver(serial_driver);
+ serial_driver = NULL;
+ goto error;
+ }
+
+ printk("%s %s, tty major#%d\n",
+ driver_name, driver_version,
+ serial_driver->major);
+
+ return 0;
+
+error:
+ synclinkmp_cleanup();
+ return rc;
+}
+
+static void __exit synclinkmp_exit(void)
+{
+ synclinkmp_cleanup();
+}
+
+module_init(synclinkmp_init);
+module_exit(synclinkmp_exit);
+
+/* Set the port for internal loopback mode.
+ * The TxCLK and RxCLK signals are generated from the BRG and
+ * the TxD is looped back to the RxD internally.
+ */
+static void enable_loopback(SLMP_INFO *info, int enable)
+{
+ if (enable) {
+ /* MD2 (Mode Register 2)
+ * 01..00 CNCT<1..0> Channel Connection 11=Local Loopback
+ */
+ write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) | (BIT1 + BIT0)));
+
+ /* degate external TxC clock source */
+ info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
+ write_control_reg(info);
+
+ /* RXS/TXS (Rx/Tx clock source)
+ * 07 Reserved, must be 0
+ * 06..04 Clock Source, 100=BRG
+ * 03..00 Clock Divisor, 0000=1
+ */
+ write_reg(info, RXS, 0x40);
+ write_reg(info, TXS, 0x40);
+
+ } else {
+ /* MD2 (Mode Register 2)
+ * 01..00 CNCT<1..0> Channel connection, 0=normal
+ */
+ write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) & ~(BIT1 + BIT0)));
+
+ /* RXS/TXS (Rx/Tx clock source)
+ * 07 Reserved, must be 0
+ * 06..04 Clock Source, 000=RxC/TxC Pin
+ * 03..00 Clock Divisor, 0000=1
+ */
+ write_reg(info, RXS, 0x00);
+ write_reg(info, TXS, 0x00);
+ }
+
+ /* set LinkSpeed if available, otherwise default to 2Mbps */
+ if (info->params.clock_speed)
+ set_rate(info, info->params.clock_speed);
+ else
+ set_rate(info, 3686400);
+}
+
+/* Set the baud rate register to the desired speed
+ *
+ * data_rate data rate of clock in bits per second
+ * A data rate of 0 disables the AUX clock.
+ */
+static void set_rate( SLMP_INFO *info, u32 data_rate )
+{
+ u32 TMCValue;
+ unsigned char BRValue;
+ u32 Divisor=0;
+
+ /* fBRG = fCLK/(TMC * 2^BR)
+ */
+ if (data_rate != 0) {
+ Divisor = 14745600/data_rate;
+ if (!Divisor)
+ Divisor = 1;
+
+ TMCValue = Divisor;
+
+ BRValue = 0;
+ if (TMCValue != 1 && TMCValue != 2) {
+ /* BRValue of 0 provides 50/50 duty cycle *only* when
+ * TMCValue is 1 or 2. BRValue of 1 to 9 always provides
+ * 50/50 duty cycle.
+ */
+ BRValue = 1;
+ TMCValue >>= 1;
+ }
+
+ /* while TMCValue is too big for TMC register, divide
+ * by 2 and increment BR exponent.
+ */
+ for(; TMCValue > 256 && BRValue < 10; BRValue++)
+ TMCValue >>= 1;
+
+ write_reg(info, TXS,
+ (unsigned char)((read_reg(info, TXS) & 0xf0) | BRValue));
+ write_reg(info, RXS,
+ (unsigned char)((read_reg(info, RXS) & 0xf0) | BRValue));
+ write_reg(info, TMC, (unsigned char)TMCValue);
+ }
+ else {
+ write_reg(info, TXS,0);
+ write_reg(info, RXS,0);
+ write_reg(info, TMC, 0);
+ }
+}
+
+/* Disable receiver
+ */
+static void rx_stop(SLMP_INFO *info)
+{
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):%s rx_stop()\n",
+ __FILE__,__LINE__, info->device_name );
+
+ write_reg(info, CMD, RXRESET);
+
+ info->ie0_value &= ~RXRDYE;
+ write_reg(info, IE0, info->ie0_value); /* disable Rx data interrupts */
+
+ write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
+ write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
+ write_reg(info, RXDMA + DIR, 0); /* disable Rx DMA interrupts */
+
+ info->rx_enabled = false;
+ info->rx_overflow = false;
+}
+
+/* enable the receiver
+ */
+static void rx_start(SLMP_INFO *info)
+{
+ int i;
+
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):%s rx_start()\n",
+ __FILE__,__LINE__, info->device_name );
+
+ write_reg(info, CMD, RXRESET);
+
+ if ( info->params.mode == MGSL_MODE_HDLC ) {
+ /* HDLC, disabe IRQ on rxdata */
+ info->ie0_value &= ~RXRDYE;
+ write_reg(info, IE0, info->ie0_value);
+
+ /* Reset all Rx DMA buffers and program rx dma */
+ write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
+ write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
+
+ for (i = 0; i < info->rx_buf_count; i++) {
+ info->rx_buf_list[i].status = 0xff;
+
+ // throttle to 4 shared memory writes at a time to prevent
+ // hogging local bus (keep latency time for DMA requests low).
+ if (!(i % 4))
+ read_status_reg(info);
+ }
+ info->current_rx_buf = 0;
+
+ /* set current/1st descriptor address */
+ write_reg16(info, RXDMA + CDA,
+ info->rx_buf_list_ex[0].phys_entry);
+
+ /* set new last rx descriptor address */
+ write_reg16(info, RXDMA + EDA,
+ info->rx_buf_list_ex[info->rx_buf_count - 1].phys_entry);
+
+ /* set buffer length (shared by all rx dma data buffers) */
+ write_reg16(info, RXDMA + BFL, SCABUFSIZE);
+
+ write_reg(info, RXDMA + DIR, 0x60); /* enable Rx DMA interrupts (EOM/BOF) */
+ write_reg(info, RXDMA + DSR, 0xf2); /* clear Rx DMA IRQs, enable Rx DMA */
+ } else {
+ /* async, enable IRQ on rxdata */
+ info->ie0_value |= RXRDYE;
+ write_reg(info, IE0, info->ie0_value);
+ }
+
+ write_reg(info, CMD, RXENABLE);
+
+ info->rx_overflow = false;
+ info->rx_enabled = true;
+}
+
+/* Enable the transmitter and send a transmit frame if
+ * one is loaded in the DMA buffers.
+ */
+static void tx_start(SLMP_INFO *info)
+{
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):%s tx_start() tx_count=%d\n",
+ __FILE__,__LINE__, info->device_name,info->tx_count );
+
+ if (!info->tx_enabled ) {
+ write_reg(info, CMD, TXRESET);
+ write_reg(info, CMD, TXENABLE);
+ info->tx_enabled = true;
+ }
+
+ if ( info->tx_count ) {
+
+ /* If auto RTS enabled and RTS is inactive, then assert */
+ /* RTS and set a flag indicating that the driver should */
+ /* negate RTS when the transmission completes. */
+
+ info->drop_rts_on_tx_done = false;
+
+ if (info->params.mode != MGSL_MODE_ASYNC) {
+
+ if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) {
+ get_signals( info );
+ if ( !(info->serial_signals & SerialSignal_RTS) ) {
+ info->serial_signals |= SerialSignal_RTS;
+ set_signals( info );
+ info->drop_rts_on_tx_done = true;
+ }
+ }
+
+ write_reg16(info, TRC0,
+ (unsigned short)(((tx_negate_fifo_level-1)<<8) + tx_active_fifo_level));
+
+ write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
+ write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
+
+ /* set TX CDA (current descriptor address) */
+ write_reg16(info, TXDMA + CDA,
+ info->tx_buf_list_ex[0].phys_entry);
+
+ /* set TX EDA (last descriptor address) */
+ write_reg16(info, TXDMA + EDA,
+ info->tx_buf_list_ex[info->last_tx_buf].phys_entry);
+
+ /* enable underrun IRQ */
+ info->ie1_value &= ~IDLE;
+ info->ie1_value |= UDRN;
+ write_reg(info, IE1, info->ie1_value);
+ write_reg(info, SR1, (unsigned char)(IDLE + UDRN));
+
+ write_reg(info, TXDMA + DIR, 0x40); /* enable Tx DMA interrupts (EOM) */
+ write_reg(info, TXDMA + DSR, 0xf2); /* clear Tx DMA IRQs, enable Tx DMA */
+
+ mod_timer(&info->tx_timer, jiffies +
+ msecs_to_jiffies(5000));
+ }
+ else {
+ tx_load_fifo(info);
+ /* async, enable IRQ on txdata */
+ info->ie0_value |= TXRDYE;
+ write_reg(info, IE0, info->ie0_value);
+ }
+
+ info->tx_active = true;
+ }
+}
+
+/* stop the transmitter and DMA
+ */
+static void tx_stop( SLMP_INFO *info )
+{
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):%s tx_stop()\n",
+ __FILE__,__LINE__, info->device_name );
+
+ del_timer(&info->tx_timer);
+
+ write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
+ write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
+
+ write_reg(info, CMD, TXRESET);
+
+ info->ie1_value &= ~(UDRN + IDLE);
+ write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
+ write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
+
+ info->ie0_value &= ~TXRDYE;
+ write_reg(info, IE0, info->ie0_value); /* disable tx data interrupts */
+
+ info->tx_enabled = false;
+ info->tx_active = false;
+}
+
+/* Fill the transmit FIFO until the FIFO is full or
+ * there is no more data to load.
+ */
+static void tx_load_fifo(SLMP_INFO *info)
+{
+ u8 TwoBytes[2];
+
+ /* do nothing is now tx data available and no XON/XOFF pending */
+
+ if ( !info->tx_count && !info->x_char )
+ return;
+
+ /* load the Transmit FIFO until FIFOs full or all data sent */
+
+ while( info->tx_count && (read_reg(info,SR0) & BIT1) ) {
+
+ /* there is more space in the transmit FIFO and */
+ /* there is more data in transmit buffer */
+
+ if ( (info->tx_count > 1) && !info->x_char ) {
+ /* write 16-bits */
+ TwoBytes[0] = info->tx_buf[info->tx_get++];
+ if (info->tx_get >= info->max_frame_size)
+ info->tx_get -= info->max_frame_size;
+ TwoBytes[1] = info->tx_buf[info->tx_get++];
+ if (info->tx_get >= info->max_frame_size)
+ info->tx_get -= info->max_frame_size;
+
+ write_reg16(info, TRB, *((u16 *)TwoBytes));
+
+ info->tx_count -= 2;
+ info->icount.tx += 2;
+ } else {
+ /* only 1 byte left to transmit or 1 FIFO slot left */
+
+ if (info->x_char) {
+ /* transmit pending high priority char */
+ write_reg(info, TRB, info->x_char);
+ info->x_char = 0;
+ } else {
+ write_reg(info, TRB, info->tx_buf[info->tx_get++]);
+ if (info->tx_get >= info->max_frame_size)
+ info->tx_get -= info->max_frame_size;
+ info->tx_count--;
+ }
+ info->icount.tx++;
+ }
+ }
+}
+
+/* Reset a port to a known state
+ */
+static void reset_port(SLMP_INFO *info)
+{
+ if (info->sca_base) {
+
+ tx_stop(info);
+ rx_stop(info);
+
+ info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
+ set_signals(info);
+
+ /* disable all port interrupts */
+ info->ie0_value = 0;
+ info->ie1_value = 0;
+ info->ie2_value = 0;
+ write_reg(info, IE0, info->ie0_value);
+ write_reg(info, IE1, info->ie1_value);
+ write_reg(info, IE2, info->ie2_value);
+
+ write_reg(info, CMD, CHRESET);
+ }
+}
+
+/* Reset all the ports to a known state.
+ */
+static void reset_adapter(SLMP_INFO *info)
+{
+ int i;
+
+ for ( i=0; i < SCA_MAX_PORTS; ++i) {
+ if (info->port_array[i])
+ reset_port(info->port_array[i]);
+ }
+}
+
+/* Program port for asynchronous communications.
+ */
+static void async_mode(SLMP_INFO *info)
+{
+
+ unsigned char RegValue;
+
+ tx_stop(info);
+ rx_stop(info);
+
+ /* MD0, Mode Register 0
+ *
+ * 07..05 PRCTL<2..0>, Protocol Mode, 000=async
+ * 04 AUTO, Auto-enable (RTS/CTS/DCD)
+ * 03 Reserved, must be 0
+ * 02 CRCCC, CRC Calculation, 0=disabled
+ * 01..00 STOP<1..0> Stop bits (00=1,10=2)
+ *
+ * 0000 0000
+ */
+ RegValue = 0x00;
+ if (info->params.stop_bits != 1)
+ RegValue |= BIT1;
+ write_reg(info, MD0, RegValue);
+
+ /* MD1, Mode Register 1
+ *
+ * 07..06 BRATE<1..0>, bit rate, 00=1/1 01=1/16 10=1/32 11=1/64
+ * 05..04 TXCHR<1..0>, tx char size, 00=8 bits,01=7,10=6,11=5
+ * 03..02 RXCHR<1..0>, rx char size
+ * 01..00 PMPM<1..0>, Parity mode, 00=none 10=even 11=odd
+ *
+ * 0100 0000
+ */
+ RegValue = 0x40;
+ switch (info->params.data_bits) {
+ case 7: RegValue |= BIT4 + BIT2; break;
+ case 6: RegValue |= BIT5 + BIT3; break;
+ case 5: RegValue |= BIT5 + BIT4 + BIT3 + BIT2; break;
+ }
+ if (info->params.parity != ASYNC_PARITY_NONE) {
+ RegValue |= BIT1;
+ if (info->params.parity == ASYNC_PARITY_ODD)
+ RegValue |= BIT0;
+ }
+ write_reg(info, MD1, RegValue);
+
+ /* MD2, Mode Register 2
+ *
+ * 07..02 Reserved, must be 0
+ * 01..00 CNCT<1..0> Channel connection, 00=normal 11=local loopback
+ *
+ * 0000 0000
+ */
+ RegValue = 0x00;
+ if (info->params.loopback)
+ RegValue |= (BIT1 + BIT0);
+ write_reg(info, MD2, RegValue);
+
+ /* RXS, Receive clock source
+ *
+ * 07 Reserved, must be 0
+ * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
+ * 03..00 RXBR<3..0>, rate divisor, 0000=1
+ */
+ RegValue=BIT6;
+ write_reg(info, RXS, RegValue);
+
+ /* TXS, Transmit clock source
+ *
+ * 07 Reserved, must be 0
+ * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
+ * 03..00 RXBR<3..0>, rate divisor, 0000=1
+ */
+ RegValue=BIT6;
+ write_reg(info, TXS, RegValue);
+
+ /* Control Register
+ *
+ * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
+ */
+ info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
+ write_control_reg(info);
+
+ tx_set_idle(info);
+
+ /* RRC Receive Ready Control 0
+ *
+ * 07..05 Reserved, must be 0
+ * 04..00 RRC<4..0> Rx FIFO trigger active 0x00 = 1 byte
+ */
+ write_reg(info, RRC, 0x00);
+
+ /* TRC0 Transmit Ready Control 0
+ *
+ * 07..05 Reserved, must be 0
+ * 04..00 TRC<4..0> Tx FIFO trigger active 0x10 = 16 bytes
+ */
+ write_reg(info, TRC0, 0x10);
+
+ /* TRC1 Transmit Ready Control 1
+ *
+ * 07..05 Reserved, must be 0
+ * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1e = 31 bytes (full-1)
+ */
+ write_reg(info, TRC1, 0x1e);
+
+ /* CTL, MSCI control register
+ *
+ * 07..06 Reserved, set to 0
+ * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
+ * 04 IDLC, idle control, 0=mark 1=idle register
+ * 03 BRK, break, 0=off 1 =on (async)
+ * 02 SYNCLD, sync char load enable (BSC) 1=enabled
+ * 01 GOP, go active on poll (LOOP mode) 1=enabled
+ * 00 RTS, RTS output control, 0=active 1=inactive
+ *
+ * 0001 0001
+ */
+ RegValue = 0x10;
+ if (!(info->serial_signals & SerialSignal_RTS))
+ RegValue |= 0x01;
+ write_reg(info, CTL, RegValue);
+
+ /* enable status interrupts */
+ info->ie0_value |= TXINTE + RXINTE;
+ write_reg(info, IE0, info->ie0_value);
+
+ /* enable break detect interrupt */
+ info->ie1_value = BRKD;
+ write_reg(info, IE1, info->ie1_value);
+
+ /* enable rx overrun interrupt */
+ info->ie2_value = OVRN;
+ write_reg(info, IE2, info->ie2_value);
+
+ set_rate( info, info->params.data_rate * 16 );
+}
+
+/* Program the SCA for HDLC communications.
+ */
+static void hdlc_mode(SLMP_INFO *info)
+{
+ unsigned char RegValue;
+ u32 DpllDivisor;
+
+ // Can't use DPLL because SCA outputs recovered clock on RxC when
+ // DPLL mode selected. This causes output contention with RxC receiver.
+ // Use of DPLL would require external hardware to disable RxC receiver
+ // when DPLL mode selected.
+ info->params.flags &= ~(HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL);
+
+ /* disable DMA interrupts */
+ write_reg(info, TXDMA + DIR, 0);
+ write_reg(info, RXDMA + DIR, 0);
+
+ /* MD0, Mode Register 0
+ *
+ * 07..05 PRCTL<2..0>, Protocol Mode, 100=HDLC
+ * 04 AUTO, Auto-enable (RTS/CTS/DCD)
+ * 03 Reserved, must be 0
+ * 02 CRCCC, CRC Calculation, 1=enabled
+ * 01 CRC1, CRC selection, 0=CRC-16,1=CRC-CCITT-16
+ * 00 CRC0, CRC initial value, 1 = all 1s
+ *
+ * 1000 0001
+ */
+ RegValue = 0x81;
+ if (info->params.flags & HDLC_FLAG_AUTO_CTS)
+ RegValue |= BIT4;
+ if (info->params.flags & HDLC_FLAG_AUTO_DCD)
+ RegValue |= BIT4;
+ if (info->params.crc_type == HDLC_CRC_16_CCITT)
+ RegValue |= BIT2 + BIT1;
+ write_reg(info, MD0, RegValue);
+
+ /* MD1, Mode Register 1
+ *
+ * 07..06 ADDRS<1..0>, Address detect, 00=no addr check
+ * 05..04 TXCHR<1..0>, tx char size, 00=8 bits
+ * 03..02 RXCHR<1..0>, rx char size, 00=8 bits
+ * 01..00 PMPM<1..0>, Parity mode, 00=no parity
+ *
+ * 0000 0000
+ */
+ RegValue = 0x00;
+ write_reg(info, MD1, RegValue);
+
+ /* MD2, Mode Register 2
+ *
+ * 07 NRZFM, 0=NRZ, 1=FM
+ * 06..05 CODE<1..0> Encoding, 00=NRZ
+ * 04..03 DRATE<1..0> DPLL Divisor, 00=8
+ * 02 Reserved, must be 0
+ * 01..00 CNCT<1..0> Channel connection, 0=normal
+ *
+ * 0000 0000
+ */
+ RegValue = 0x00;
+ switch(info->params.encoding) {
+ case HDLC_ENCODING_NRZI: RegValue |= BIT5; break;
+ case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT7 + BIT5; break; /* aka FM1 */
+ case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT7 + BIT6; break; /* aka FM0 */
+ case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT7; break; /* aka Manchester */
+#if 0
+ case HDLC_ENCODING_NRZB: /* not supported */
+ case HDLC_ENCODING_NRZI_MARK: /* not supported */
+ case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: /* not supported */
+#endif
+ }
+ if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) {
+ DpllDivisor = 16;
+ RegValue |= BIT3;
+ } else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) {
+ DpllDivisor = 8;
+ } else {
+ DpllDivisor = 32;
+ RegValue |= BIT4;
+ }
+ write_reg(info, MD2, RegValue);
+
+
+ /* RXS, Receive clock source
+ *
+ * 07 Reserved, must be 0
+ * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
+ * 03..00 RXBR<3..0>, rate divisor, 0000=1
+ */
+ RegValue=0;
+ if (info->params.flags & HDLC_FLAG_RXC_BRG)
+ RegValue |= BIT6;
+ if (info->params.flags & HDLC_FLAG_RXC_DPLL)
+ RegValue |= BIT6 + BIT5;
+ write_reg(info, RXS, RegValue);
+
+ /* TXS, Transmit clock source
+ *
+ * 07 Reserved, must be 0
+ * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
+ * 03..00 RXBR<3..0>, rate divisor, 0000=1
+ */
+ RegValue=0;
+ if (info->params.flags & HDLC_FLAG_TXC_BRG)
+ RegValue |= BIT6;
+ if (info->params.flags & HDLC_FLAG_TXC_DPLL)
+ RegValue |= BIT6 + BIT5;
+ write_reg(info, TXS, RegValue);
+
+ if (info->params.flags & HDLC_FLAG_RXC_DPLL)
+ set_rate(info, info->params.clock_speed * DpllDivisor);
+ else
+ set_rate(info, info->params.clock_speed);
+
+ /* GPDATA (General Purpose I/O Data Register)
+ *
+ * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
+ */
+ if (info->params.flags & HDLC_FLAG_TXC_BRG)
+ info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
+ else
+ info->port_array[0]->ctrlreg_value &= ~(BIT0 << (info->port_num * 2));
+ write_control_reg(info);
+
+ /* RRC Receive Ready Control 0
+ *
+ * 07..05 Reserved, must be 0
+ * 04..00 RRC<4..0> Rx FIFO trigger active
+ */
+ write_reg(info, RRC, rx_active_fifo_level);
+
+ /* TRC0 Transmit Ready Control 0
+ *
+ * 07..05 Reserved, must be 0
+ * 04..00 TRC<4..0> Tx FIFO trigger active
+ */
+ write_reg(info, TRC0, tx_active_fifo_level);
+
+ /* TRC1 Transmit Ready Control 1
+ *
+ * 07..05 Reserved, must be 0
+ * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1f = 32 bytes (full)
+ */
+ write_reg(info, TRC1, (unsigned char)(tx_negate_fifo_level - 1));
+
+ /* DMR, DMA Mode Register
+ *
+ * 07..05 Reserved, must be 0
+ * 04 TMOD, Transfer Mode: 1=chained-block
+ * 03 Reserved, must be 0
+ * 02 NF, Number of Frames: 1=multi-frame
+ * 01 CNTE, Frame End IRQ Counter enable: 0=disabled
+ * 00 Reserved, must be 0
+ *
+ * 0001 0100
+ */
+ write_reg(info, TXDMA + DMR, 0x14);
+ write_reg(info, RXDMA + DMR, 0x14);
+
+ /* Set chain pointer base (upper 8 bits of 24 bit addr) */
+ write_reg(info, RXDMA + CPB,
+ (unsigned char)(info->buffer_list_phys >> 16));
+
+ /* Set chain pointer base (upper 8 bits of 24 bit addr) */
+ write_reg(info, TXDMA + CPB,
+ (unsigned char)(info->buffer_list_phys >> 16));
+
+ /* enable status interrupts. other code enables/disables
+ * the individual sources for these two interrupt classes.
+ */
+ info->ie0_value |= TXINTE + RXINTE;
+ write_reg(info, IE0, info->ie0_value);
+
+ /* CTL, MSCI control register
+ *
+ * 07..06 Reserved, set to 0
+ * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
+ * 04 IDLC, idle control, 0=mark 1=idle register
+ * 03 BRK, break, 0=off 1 =on (async)
+ * 02 SYNCLD, sync char load enable (BSC) 1=enabled
+ * 01 GOP, go active on poll (LOOP mode) 1=enabled
+ * 00 RTS, RTS output control, 0=active 1=inactive
+ *
+ * 0001 0001
+ */
+ RegValue = 0x10;
+ if (!(info->serial_signals & SerialSignal_RTS))
+ RegValue |= 0x01;
+ write_reg(info, CTL, RegValue);
+
+ /* preamble not supported ! */
+
+ tx_set_idle(info);
+ tx_stop(info);
+ rx_stop(info);
+
+ set_rate(info, info->params.clock_speed);
+
+ if (info->params.loopback)
+ enable_loopback(info,1);
+}
+
+/* Set the transmit HDLC idle mode
+ */
+static void tx_set_idle(SLMP_INFO *info)
+{
+ unsigned char RegValue = 0xff;
+
+ /* Map API idle mode to SCA register bits */
+ switch(info->idle_mode) {
+ case HDLC_TXIDLE_FLAGS: RegValue = 0x7e; break;
+ case HDLC_TXIDLE_ALT_ZEROS_ONES: RegValue = 0xaa; break;
+ case HDLC_TXIDLE_ZEROS: RegValue = 0x00; break;
+ case HDLC_TXIDLE_ONES: RegValue = 0xff; break;
+ case HDLC_TXIDLE_ALT_MARK_SPACE: RegValue = 0xaa; break;
+ case HDLC_TXIDLE_SPACE: RegValue = 0x00; break;
+ case HDLC_TXIDLE_MARK: RegValue = 0xff; break;
+ }
+
+ write_reg(info, IDL, RegValue);
+}
+
+/* Query the adapter for the state of the V24 status (input) signals.
+ */
+static void get_signals(SLMP_INFO *info)
+{
+ u16 status = read_reg(info, SR3);
+ u16 gpstatus = read_status_reg(info);
+ u16 testbit;
+
+ /* clear all serial signals except DTR and RTS */
+ info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
+
+ /* set serial signal bits to reflect MISR */
+
+ if (!(status & BIT3))
+ info->serial_signals |= SerialSignal_CTS;
+
+ if ( !(status & BIT2))
+ info->serial_signals |= SerialSignal_DCD;
+
+ testbit = BIT1 << (info->port_num * 2); // Port 0..3 RI is GPDATA<1,3,5,7>
+ if (!(gpstatus & testbit))
+ info->serial_signals |= SerialSignal_RI;
+
+ testbit = BIT0 << (info->port_num * 2); // Port 0..3 DSR is GPDATA<0,2,4,6>
+ if (!(gpstatus & testbit))
+ info->serial_signals |= SerialSignal_DSR;
+}
+
+/* Set the state of DTR and RTS based on contents of
+ * serial_signals member of device context.
+ */
+static void set_signals(SLMP_INFO *info)
+{
+ unsigned char RegValue;
+ u16 EnableBit;
+
+ RegValue = read_reg(info, CTL);
+ if (info->serial_signals & SerialSignal_RTS)
+ RegValue &= ~BIT0;
+ else
+ RegValue |= BIT0;
+ write_reg(info, CTL, RegValue);
+
+ // Port 0..3 DTR is ctrl reg <1,3,5,7>
+ EnableBit = BIT1 << (info->port_num*2);
+ if (info->serial_signals & SerialSignal_DTR)
+ info->port_array[0]->ctrlreg_value &= ~EnableBit;
+ else
+ info->port_array[0]->ctrlreg_value |= EnableBit;
+ write_control_reg(info);
+}
+
+/*******************/
+/* DMA Buffer Code */
+/*******************/
+
+/* Set the count for all receive buffers to SCABUFSIZE
+ * and set the current buffer to the first buffer. This effectively
+ * makes all buffers free and discards any data in buffers.
+ */
+static void rx_reset_buffers(SLMP_INFO *info)
+{
+ rx_free_frame_buffers(info, 0, info->rx_buf_count - 1);
+}
+
+/* Free the buffers used by a received frame
+ *
+ * info pointer to device instance data
+ * first index of 1st receive buffer of frame
+ * last index of last receive buffer of frame
+ */
+static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last)
+{
+ bool done = false;
+
+ while(!done) {
+ /* reset current buffer for reuse */
+ info->rx_buf_list[first].status = 0xff;
+
+ if (first == last) {
+ done = true;
+ /* set new last rx descriptor address */
+ write_reg16(info, RXDMA + EDA, info->rx_buf_list_ex[first].phys_entry);
+ }
+
+ first++;
+ if (first == info->rx_buf_count)
+ first = 0;
+ }
+
+ /* set current buffer to next buffer after last buffer of frame */
+ info->current_rx_buf = first;
+}
+
+/* Return a received frame from the receive DMA buffers.
+ * Only frames received without errors are returned.
+ *
+ * Return Value: true if frame returned, otherwise false
+ */
+static bool rx_get_frame(SLMP_INFO *info)
+{
+ unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */
+ unsigned short status;
+ unsigned int framesize = 0;
+ bool ReturnCode = false;
+ unsigned long flags;
+ struct tty_struct *tty = info->port.tty;
+ unsigned char addr_field = 0xff;
+ SCADESC *desc;
+ SCADESC_EX *desc_ex;
+
+CheckAgain:
+ /* assume no frame returned, set zero length */
+ framesize = 0;
+ addr_field = 0xff;
+
+ /*
+ * current_rx_buf points to the 1st buffer of the next available
+ * receive frame. To find the last buffer of the frame look for
+ * a non-zero status field in the buffer entries. (The status
+ * field is set by the 16C32 after completing a receive frame.
+ */
+ StartIndex = EndIndex = info->current_rx_buf;
+
+ for ( ;; ) {
+ desc = &info->rx_buf_list[EndIndex];
+ desc_ex = &info->rx_buf_list_ex[EndIndex];
+
+ if (desc->status == 0xff)
+ goto Cleanup; /* current desc still in use, no frames available */
+
+ if (framesize == 0 && info->params.addr_filter != 0xff)
+ addr_field = desc_ex->virt_addr[0];
+
+ framesize += desc->length;
+
+ /* Status != 0 means last buffer of frame */
+ if (desc->status)
+ break;
+
+ EndIndex++;
+ if (EndIndex == info->rx_buf_count)
+ EndIndex = 0;
+
+ if (EndIndex == info->current_rx_buf) {
+ /* all buffers have been 'used' but none mark */
+ /* the end of a frame. Reset buffers and receiver. */
+ if ( info->rx_enabled ){
+ spin_lock_irqsave(&info->lock,flags);
+ rx_start(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+ goto Cleanup;
+ }
+
+ }
+
+ /* check status of receive frame */
+
+ /* frame status is byte stored after frame data
+ *
+ * 7 EOM (end of msg), 1 = last buffer of frame
+ * 6 Short Frame, 1 = short frame
+ * 5 Abort, 1 = frame aborted
+ * 4 Residue, 1 = last byte is partial
+ * 3 Overrun, 1 = overrun occurred during frame reception
+ * 2 CRC, 1 = CRC error detected
+ *
+ */
+ status = desc->status;
+
+ /* ignore CRC bit if not using CRC (bit is undefined) */
+ /* Note:CRC is not save to data buffer */
+ if (info->params.crc_type == HDLC_CRC_NONE)
+ status &= ~BIT2;
+
+ if (framesize == 0 ||
+ (addr_field != 0xff && addr_field != info->params.addr_filter)) {
+ /* discard 0 byte frames, this seems to occur sometime
+ * when remote is idling flags.
+ */
+ rx_free_frame_buffers(info, StartIndex, EndIndex);
+ goto CheckAgain;
+ }
+
+ if (framesize < 2)
+ status |= BIT6;
+
+ if (status & (BIT6+BIT5+BIT3+BIT2)) {
+ /* received frame has errors,
+ * update counts and mark frame size as 0
+ */
+ if (status & BIT6)
+ info->icount.rxshort++;
+ else if (status & BIT5)
+ info->icount.rxabort++;
+ else if (status & BIT3)
+ info->icount.rxover++;
+ else
+ info->icount.rxcrc++;
+
+ framesize = 0;
+#if SYNCLINK_GENERIC_HDLC
+ {
+ info->netdev->stats.rx_errors++;
+ info->netdev->stats.rx_frame_errors++;
+ }
+#endif
+ }
+
+ if ( debug_level >= DEBUG_LEVEL_BH )
+ printk("%s(%d):%s rx_get_frame() status=%04X size=%d\n",
+ __FILE__,__LINE__,info->device_name,status,framesize);
+
+ if ( debug_level >= DEBUG_LEVEL_DATA )
+ trace_block(info,info->rx_buf_list_ex[StartIndex].virt_addr,
+ min_t(int, framesize,SCABUFSIZE),0);
+
+ if (framesize) {
+ if (framesize > info->max_frame_size)
+ info->icount.rxlong++;
+ else {
+ /* copy dma buffer(s) to contiguous intermediate buffer */
+ int copy_count = framesize;
+ int index = StartIndex;
+ unsigned char *ptmp = info->tmp_rx_buf;
+ info->tmp_rx_buf_count = framesize;
+
+ info->icount.rxok++;
+
+ while(copy_count) {
+ int partial_count = min(copy_count,SCABUFSIZE);
+ memcpy( ptmp,
+ info->rx_buf_list_ex[index].virt_addr,
+ partial_count );
+ ptmp += partial_count;
+ copy_count -= partial_count;
+
+ if ( ++index == info->rx_buf_count )
+ index = 0;
+ }
+
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount)
+ hdlcdev_rx(info,info->tmp_rx_buf,framesize);
+ else
+#endif
+ ldisc_receive_buf(tty,info->tmp_rx_buf,
+ info->flag_buf, framesize);
+ }
+ }
+ /* Free the buffers used by this frame. */
+ rx_free_frame_buffers( info, StartIndex, EndIndex );
+
+ ReturnCode = true;
+
+Cleanup:
+ if ( info->rx_enabled && info->rx_overflow ) {
+ /* Receiver is enabled, but needs to restarted due to
+ * rx buffer overflow. If buffers are empty, restart receiver.
+ */
+ if (info->rx_buf_list[EndIndex].status == 0xff) {
+ spin_lock_irqsave(&info->lock,flags);
+ rx_start(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ }
+ }
+
+ return ReturnCode;
+}
+
+/* load the transmit DMA buffer with data
+ */
+static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count)
+{
+ unsigned short copy_count;
+ unsigned int i = 0;
+ SCADESC *desc;
+ SCADESC_EX *desc_ex;
+
+ if ( debug_level >= DEBUG_LEVEL_DATA )
+ trace_block(info,buf, min_t(int, count,SCABUFSIZE), 1);
+
+ /* Copy source buffer to one or more DMA buffers, starting with
+ * the first transmit dma buffer.
+ */
+ for(i=0;;)
+ {
+ copy_count = min_t(unsigned short,count,SCABUFSIZE);
+
+ desc = &info->tx_buf_list[i];
+ desc_ex = &info->tx_buf_list_ex[i];
+
+ load_pci_memory(info, desc_ex->virt_addr,buf,copy_count);
+
+ desc->length = copy_count;
+ desc->status = 0;
+
+ buf += copy_count;
+ count -= copy_count;
+
+ if (!count)
+ break;
+
+ i++;
+ if (i >= info->tx_buf_count)
+ i = 0;
+ }
+
+ info->tx_buf_list[i].status = 0x81; /* set EOM and EOT status */
+ info->last_tx_buf = ++i;
+}
+
+static bool register_test(SLMP_INFO *info)
+{
+ static unsigned char testval[] = {0x00, 0xff, 0xaa, 0x55, 0x69, 0x96};
+ static unsigned int count = ARRAY_SIZE(testval);
+ unsigned int i;
+ bool rc = true;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+ reset_port(info);
+
+ /* assume failure */
+ info->init_error = DiagStatus_AddressFailure;
+
+ /* Write bit patterns to various registers but do it out of */
+ /* sync, then read back and verify values. */
+
+ for (i = 0 ; i < count ; i++) {
+ write_reg(info, TMC, testval[i]);
+ write_reg(info, IDL, testval[(i+1)%count]);
+ write_reg(info, SA0, testval[(i+2)%count]);
+ write_reg(info, SA1, testval[(i+3)%count]);
+
+ if ( (read_reg(info, TMC) != testval[i]) ||
+ (read_reg(info, IDL) != testval[(i+1)%count]) ||
+ (read_reg(info, SA0) != testval[(i+2)%count]) ||
+ (read_reg(info, SA1) != testval[(i+3)%count]) )
+ {
+ rc = false;
+ break;
+ }
+ }
+
+ reset_port(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ return rc;
+}
+
+static bool irq_test(SLMP_INFO *info)
+{
+ unsigned long timeout;
+ unsigned long flags;
+
+ unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
+
+ spin_lock_irqsave(&info->lock,flags);
+ reset_port(info);
+
+ /* assume failure */
+ info->init_error = DiagStatus_IrqFailure;
+ info->irq_occurred = false;
+
+ /* setup timer0 on SCA0 to interrupt */
+
+ /* IER2<7..4> = timer<3..0> interrupt enables (1=enabled) */
+ write_reg(info, IER2, (unsigned char)((info->port_num & 1) ? BIT6 : BIT4));
+
+ write_reg(info, (unsigned char)(timer + TEPR), 0); /* timer expand prescale */
+ write_reg16(info, (unsigned char)(timer + TCONR), 1); /* timer constant */
+
+
+ /* TMCS, Timer Control/Status Register
+ *
+ * 07 CMF, Compare match flag (read only) 1=match
+ * 06 ECMI, CMF Interrupt Enable: 1=enabled
+ * 05 Reserved, must be 0
+ * 04 TME, Timer Enable
+ * 03..00 Reserved, must be 0
+ *
+ * 0101 0000
+ */
+ write_reg(info, (unsigned char)(timer + TMCS), 0x50);
+
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ timeout=100;
+ while( timeout-- && !info->irq_occurred ) {
+ msleep_interruptible(10);
+ }
+
+ spin_lock_irqsave(&info->lock,flags);
+ reset_port(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ return info->irq_occurred;
+}
+
+/* initialize individual SCA device (2 ports)
+ */
+static bool sca_init(SLMP_INFO *info)
+{
+ /* set wait controller to single mem partition (low), no wait states */
+ write_reg(info, PABR0, 0); /* wait controller addr boundary 0 */
+ write_reg(info, PABR1, 0); /* wait controller addr boundary 1 */
+ write_reg(info, WCRL, 0); /* wait controller low range */
+ write_reg(info, WCRM, 0); /* wait controller mid range */
+ write_reg(info, WCRH, 0); /* wait controller high range */
+
+ /* DPCR, DMA Priority Control
+ *
+ * 07..05 Not used, must be 0
+ * 04 BRC, bus release condition: 0=all transfers complete
+ * 03 CCC, channel change condition: 0=every cycle
+ * 02..00 PR<2..0>, priority 100=round robin
+ *
+ * 00000100 = 0x04
+ */
+ write_reg(info, DPCR, dma_priority);
+
+ /* DMA Master Enable, BIT7: 1=enable all channels */
+ write_reg(info, DMER, 0x80);
+
+ /* enable all interrupt classes */
+ write_reg(info, IER0, 0xff); /* TxRDY,RxRDY,TxINT,RxINT (ports 0-1) */
+ write_reg(info, IER1, 0xff); /* DMIB,DMIA (channels 0-3) */
+ write_reg(info, IER2, 0xf0); /* TIRQ (timers 0-3) */
+
+ /* ITCR, interrupt control register
+ * 07 IPC, interrupt priority, 0=MSCI->DMA
+ * 06..05 IAK<1..0>, Acknowledge cycle, 00=non-ack cycle
+ * 04 VOS, Vector Output, 0=unmodified vector
+ * 03..00 Reserved, must be 0
+ */
+ write_reg(info, ITCR, 0);
+
+ return true;
+}
+
+/* initialize adapter hardware
+ */
+static bool init_adapter(SLMP_INFO *info)
+{
+ int i;
+
+ /* Set BIT30 of Local Control Reg 0x50 to reset SCA */
+ volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50);
+ u32 readval;
+
+ info->misc_ctrl_value |= BIT30;
+ *MiscCtrl = info->misc_ctrl_value;
+
+ /*
+ * Force at least 170ns delay before clearing
+ * reset bit. Each read from LCR takes at least
+ * 30ns so 10 times for 300ns to be safe.
+ */
+ for(i=0;i<10;i++)
+ readval = *MiscCtrl;
+
+ info->misc_ctrl_value &= ~BIT30;
+ *MiscCtrl = info->misc_ctrl_value;
+
+ /* init control reg (all DTRs off, all clksel=input) */
+ info->ctrlreg_value = 0xaa;
+ write_control_reg(info);
+
+ {
+ volatile u32 *LCR1BRDR = (u32 *)(info->lcr_base + 0x2c);
+ lcr1_brdr_value &= ~(BIT5 + BIT4 + BIT3);
+
+ switch(read_ahead_count)
+ {
+ case 16:
+ lcr1_brdr_value |= BIT5 + BIT4 + BIT3;
+ break;
+ case 8:
+ lcr1_brdr_value |= BIT5 + BIT4;
+ break;
+ case 4:
+ lcr1_brdr_value |= BIT5 + BIT3;
+ break;
+ case 0:
+ lcr1_brdr_value |= BIT5;
+ break;
+ }
+
+ *LCR1BRDR = lcr1_brdr_value;
+ *MiscCtrl = misc_ctrl_value;
+ }
+
+ sca_init(info->port_array[0]);
+ sca_init(info->port_array[2]);
+
+ return true;
+}
+
+/* Loopback an HDLC frame to test the hardware
+ * interrupt and DMA functions.
+ */
+static bool loopback_test(SLMP_INFO *info)
+{
+#define TESTFRAMESIZE 20
+
+ unsigned long timeout;
+ u16 count = TESTFRAMESIZE;
+ unsigned char buf[TESTFRAMESIZE];
+ bool rc = false;
+ unsigned long flags;
+
+ struct tty_struct *oldtty = info->port.tty;
+ u32 speed = info->params.clock_speed;
+
+ info->params.clock_speed = 3686400;
+ info->port.tty = NULL;
+
+ /* assume failure */
+ info->init_error = DiagStatus_DmaFailure;
+
+ /* build and send transmit frame */
+ for (count = 0; count < TESTFRAMESIZE;++count)
+ buf[count] = (unsigned char)count;
+
+ memset(info->tmp_rx_buf,0,TESTFRAMESIZE);
+
+ /* program hardware for HDLC and enabled receiver */
+ spin_lock_irqsave(&info->lock,flags);
+ hdlc_mode(info);
+ enable_loopback(info,1);
+ rx_start(info);
+ info->tx_count = count;
+ tx_load_dma_buffer(info,buf,count);
+ tx_start(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ /* wait for receive complete */
+ /* Set a timeout for waiting for interrupt. */
+ for ( timeout = 100; timeout; --timeout ) {
+ msleep_interruptible(10);
+
+ if (rx_get_frame(info)) {
+ rc = true;
+ break;
+ }
+ }
+
+ /* verify received frame length and contents */
+ if (rc &&
+ ( info->tmp_rx_buf_count != count ||
+ memcmp(buf, info->tmp_rx_buf,count))) {
+ rc = false;
+ }
+
+ spin_lock_irqsave(&info->lock,flags);
+ reset_adapter(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ info->params.clock_speed = speed;
+ info->port.tty = oldtty;
+
+ return rc;
+}
+
+/* Perform diagnostics on hardware
+ */
+static int adapter_test( SLMP_INFO *info )
+{
+ unsigned long flags;
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):Testing device %s\n",
+ __FILE__,__LINE__,info->device_name );
+
+ spin_lock_irqsave(&info->lock,flags);
+ init_adapter(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ info->port_array[0]->port_count = 0;
+
+ if ( register_test(info->port_array[0]) &&
+ register_test(info->port_array[1])) {
+
+ info->port_array[0]->port_count = 2;
+
+ if ( register_test(info->port_array[2]) &&
+ register_test(info->port_array[3]) )
+ info->port_array[0]->port_count += 2;
+ }
+ else {
+ printk( "%s(%d):Register test failure for device %s Addr=%08lX\n",
+ __FILE__,__LINE__,info->device_name, (unsigned long)(info->phys_sca_base));
+ return -ENODEV;
+ }
+
+ if ( !irq_test(info->port_array[0]) ||
+ !irq_test(info->port_array[1]) ||
+ (info->port_count == 4 && !irq_test(info->port_array[2])) ||
+ (info->port_count == 4 && !irq_test(info->port_array[3]))) {
+ printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
+ __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
+ return -ENODEV;
+ }
+
+ if (!loopback_test(info->port_array[0]) ||
+ !loopback_test(info->port_array[1]) ||
+ (info->port_count == 4 && !loopback_test(info->port_array[2])) ||
+ (info->port_count == 4 && !loopback_test(info->port_array[3]))) {
+ printk( "%s(%d):DMA test failure for device %s\n",
+ __FILE__,__LINE__,info->device_name);
+ return -ENODEV;
+ }
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):device %s passed diagnostics\n",
+ __FILE__,__LINE__,info->device_name );
+
+ info->port_array[0]->init_error = 0;
+ info->port_array[1]->init_error = 0;
+ if ( info->port_count > 2 ) {
+ info->port_array[2]->init_error = 0;
+ info->port_array[3]->init_error = 0;
+ }
+
+ return 0;
+}
+
+/* Test the shared memory on a PCI adapter.
+ */
+static bool memory_test(SLMP_INFO *info)
+{
+ static unsigned long testval[] = { 0x0, 0x55555555, 0xaaaaaaaa,
+ 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
+ unsigned long count = ARRAY_SIZE(testval);
+ unsigned long i;
+ unsigned long limit = SCA_MEM_SIZE/sizeof(unsigned long);
+ unsigned long * addr = (unsigned long *)info->memory_base;
+
+ /* Test data lines with test pattern at one location. */
+
+ for ( i = 0 ; i < count ; i++ ) {
+ *addr = testval[i];
+ if ( *addr != testval[i] )
+ return false;
+ }
+
+ /* Test address lines with incrementing pattern over */
+ /* entire address range. */
+
+ for ( i = 0 ; i < limit ; i++ ) {
+ *addr = i * 4;
+ addr++;
+ }
+
+ addr = (unsigned long *)info->memory_base;
+
+ for ( i = 0 ; i < limit ; i++ ) {
+ if ( *addr != i * 4 )
+ return false;
+ addr++;
+ }
+
+ memset( info->memory_base, 0, SCA_MEM_SIZE );
+ return true;
+}
+
+/* Load data into PCI adapter shared memory.
+ *
+ * The PCI9050 releases control of the local bus
+ * after completing the current read or write operation.
+ *
+ * While the PCI9050 write FIFO not empty, the
+ * PCI9050 treats all of the writes as a single transaction
+ * and does not release the bus. This causes DMA latency problems
+ * at high speeds when copying large data blocks to the shared memory.
+ *
+ * This function breaks a write into multiple transations by
+ * interleaving a read which flushes the write FIFO and 'completes'
+ * the write transation. This allows any pending DMA request to gain control
+ * of the local bus in a timely fasion.
+ */
+static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count)
+{
+ /* A load interval of 16 allows for 4 32-bit writes at */
+ /* 136ns each for a maximum latency of 542ns on the local bus.*/
+
+ unsigned short interval = count / sca_pci_load_interval;
+ unsigned short i;
+
+ for ( i = 0 ; i < interval ; i++ )
+ {
+ memcpy(dest, src, sca_pci_load_interval);
+ read_status_reg(info);
+ dest += sca_pci_load_interval;
+ src += sca_pci_load_interval;
+ }
+
+ memcpy(dest, src, count % sca_pci_load_interval);
+}
+
+static void trace_block(SLMP_INFO *info,const char* data, int count, int xmit)
+{
+ int i;
+ int linecount;
+ if (xmit)
+ printk("%s tx data:\n",info->device_name);
+ else
+ printk("%s rx data:\n",info->device_name);
+
+ while(count) {
+ if (count > 16)
+ linecount = 16;
+ else
+ linecount = count;
+
+ for(i=0;i<linecount;i++)
+ printk("%02X ",(unsigned char)data[i]);
+ for(;i<17;i++)
+ printk(" ");
+ for(i=0;i<linecount;i++) {
+ if (data[i]>=040 && data[i]<=0176)
+ printk("%c",data[i]);
+ else
+ printk(".");
+ }
+ printk("\n");
+
+ data += linecount;
+ count -= linecount;
+ }
+} /* end of trace_block() */
+
+/* called when HDLC frame times out
+ * update stats and do tx completion processing
+ */
+static void tx_timeout(unsigned long context)
+{
+ SLMP_INFO *info = (SLMP_INFO*)context;
+ unsigned long flags;
+
+ if ( debug_level >= DEBUG_LEVEL_INFO )
+ printk( "%s(%d):%s tx_timeout()\n",
+ __FILE__,__LINE__,info->device_name);
+ if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) {
+ info->icount.txtimeout++;
+ }
+ spin_lock_irqsave(&info->lock,flags);
+ info->tx_active = false;
+ info->tx_count = info->tx_put = info->tx_get = 0;
+
+ spin_unlock_irqrestore(&info->lock,flags);
+
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount)
+ hdlcdev_tx_done(info);
+ else
+#endif
+ bh_transmit(info);
+}
+
+/* called to periodically check the DSR/RI modem signal input status
+ */
+static void status_timeout(unsigned long context)
+{
+ u16 status = 0;
+ SLMP_INFO *info = (SLMP_INFO*)context;
+ unsigned long flags;
+ unsigned char delta;
+
+
+ spin_lock_irqsave(&info->lock,flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ /* check for DSR/RI state change */
+
+ delta = info->old_signals ^ info->serial_signals;
+ info->old_signals = info->serial_signals;
+
+ if (delta & SerialSignal_DSR)
+ status |= MISCSTATUS_DSR_LATCHED|(info->serial_signals&SerialSignal_DSR);
+
+ if (delta & SerialSignal_RI)
+ status |= MISCSTATUS_RI_LATCHED|(info->serial_signals&SerialSignal_RI);
+
+ if (delta & SerialSignal_DCD)
+ status |= MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD);
+
+ if (delta & SerialSignal_CTS)
+ status |= MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS);
+
+ if (status)
+ isr_io_pin(info,status);
+
+ mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10));
+}
+
+
+/* Register Access Routines -
+ * All registers are memory mapped
+ */
+#define CALC_REGADDR() \
+ unsigned char * RegAddr = (unsigned char*)(info->sca_base + Addr); \
+ if (info->port_num > 1) \
+ RegAddr += 256; /* port 0-1 SCA0, 2-3 SCA1 */ \
+ if ( info->port_num & 1) { \
+ if (Addr > 0x7f) \
+ RegAddr += 0x40; /* DMA access */ \
+ else if (Addr > 0x1f && Addr < 0x60) \
+ RegAddr += 0x20; /* MSCI access */ \
+ }
+
+
+static unsigned char read_reg(SLMP_INFO * info, unsigned char Addr)
+{
+ CALC_REGADDR();
+ return *RegAddr;
+}
+static void write_reg(SLMP_INFO * info, unsigned char Addr, unsigned char Value)
+{
+ CALC_REGADDR();
+ *RegAddr = Value;
+}
+
+static u16 read_reg16(SLMP_INFO * info, unsigned char Addr)
+{
+ CALC_REGADDR();
+ return *((u16 *)RegAddr);
+}
+
+static void write_reg16(SLMP_INFO * info, unsigned char Addr, u16 Value)
+{
+ CALC_REGADDR();
+ *((u16 *)RegAddr) = Value;
+}
+
+static unsigned char read_status_reg(SLMP_INFO * info)
+{
+ unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
+ return *RegAddr;
+}
+
+static void write_control_reg(SLMP_INFO * info)
+{
+ unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
+ *RegAddr = info->port_array[0]->ctrlreg_value;
+}
+
+
+static int __devinit synclinkmp_init_one (struct pci_dev *dev,
+ const struct pci_device_id *ent)
+{
+ if (pci_enable_device(dev)) {
+ printk("error enabling pci device %p\n", dev);
+ return -EIO;
+ }
+ device_init( ++synclinkmp_adapter_count, dev );
+ return 0;
+}
+
+static void __devexit synclinkmp_remove_one (struct pci_dev *dev)
+{
+}
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff