* Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com)
*
* This code is loosely based on the Linux serial driver, written by
- * Linus Torvalds, Theodore T'so and others. The RISCom/8 card
- * programming info was obtained from various drivers for other OSes
- * (FreeBSD, ISC, etc), but no source code from those drivers were
+ * Linus Torvalds, Theodore T'so and others. The RISCom/8 card
+ * programming info was obtained from various drivers for other OSes
+ * (FreeBSD, ISC, etc), but no source code from those drivers were
* directly included in this driver.
*
*
#include <linux/module.h>
-#include <asm/io.h>
+#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/tty_flip.h>
#include <linux/spinlock.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include "riscom8.h"
#include "riscom8_reg.h"
/* Am I paranoid or not ? ;-) */
#define RISCOM_PARANOIA_CHECK
-/*
- * Crazy InteliCom/8 boards sometimes has swapped CTS & DSR signals.
+/*
+ * Crazy InteliCom/8 boards sometimes have swapped CTS & DSR signals.
* You can slightly speed up things by #undefing the following option,
- * if you are REALLY sure that your board is correct one.
+ * if you are REALLY sure that your board is correct one.
*/
#define RISCOM_BRAIN_DAMAGED_CTS
-/*
+/*
* The following defines are mostly for testing purposes. But if you need
* some nice reporting in your syslog, you can define them also.
*/
#define RC_NIOPORT ARRAY_SIZE(rc_ioport)
-static inline int rc_paranoia_check(struct riscom_port const * port,
+static int rc_paranoia_check(struct riscom_port const *port,
char *name, const char *routine)
{
#ifdef RISCOM_PARANOIA_CHECK
}
/*
- *
+ *
* Service functions for RISCom/8 driver.
- *
+ *
*/
/* Get board number from pointer */
-static inline int board_No (struct riscom_board const * bp)
+static inline int board_No(struct riscom_board const *bp)
{
return bp - rc_board;
}
/* Get port number from pointer */
-static inline int port_No (struct riscom_port const * port)
+static inline int port_No(struct riscom_port const *port)
{
- return RC_PORT(port - rc_port);
+ return RC_PORT(port - rc_port);
}
/* Get pointer to board from pointer to port */
-static inline struct riscom_board * port_Board(struct riscom_port const * port)
+static inline struct riscom_board *port_Board(struct riscom_port const *port)
{
return &rc_board[RC_BOARD(port - rc_port)];
}
/* Input Byte from CL CD180 register */
-static inline unsigned char rc_in(struct riscom_board const * bp, unsigned short reg)
+static inline unsigned char rc_in(struct riscom_board const *bp,
+ unsigned short reg)
{
return inb(bp->base + RC_TO_ISA(reg));
}
/* Output Byte to CL CD180 register */
-static inline void rc_out(struct riscom_board const * bp, unsigned short reg,
+static inline void rc_out(struct riscom_board const *bp, unsigned short reg,
unsigned char val)
{
outb(val, bp->base + RC_TO_ISA(reg));
}
/* Wait for Channel Command Register ready */
-static inline void rc_wait_CCR(struct riscom_board const * bp)
+static void rc_wait_CCR(struct riscom_board const *bp)
{
unsigned long delay;
/* FIXME: need something more descriptive then 100000 :) */
- for (delay = 100000; delay; delay--)
+ for (delay = 100000; delay; delay--)
if (!rc_in(bp, CD180_CCR))
return;
-
+
printk(KERN_INFO "rc%d: Timeout waiting for CCR.\n", board_No(bp));
}
* RISCom/8 probe functions.
*/
-static inline int rc_request_io_range(struct riscom_board * const bp)
+static int rc_request_io_range(struct riscom_board * const bp)
{
int i;
-
- for (i = 0; i < RC_NIOPORT; i++)
+
+ for (i = 0; i < RC_NIOPORT; i++)
if (!request_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1,
"RISCom/8")) {
goto out_release;
out_release:
printk(KERN_INFO "rc%d: Skipping probe at 0x%03x. IO address in use.\n",
board_No(bp), bp->base);
- while(--i >= 0)
+ while (--i >= 0)
release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1);
return 1;
}
-static inline void rc_release_io_range(struct riscom_board * const bp)
+static void rc_release_io_range(struct riscom_board * const bp)
{
int i;
-
- for (i = 0; i < RC_NIOPORT; i++)
+
+ for (i = 0; i < RC_NIOPORT; i++)
release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1);
}
-
+
/* Reset and setup CD180 chip */
-static void __init rc_init_CD180(struct riscom_board const * bp)
+static void __init rc_init_CD180(struct riscom_board const *bp)
{
unsigned long flags;
-
+
spin_lock_irqsave(&riscom_lock, flags);
- rc_out(bp, RC_CTOUT, 0); /* Clear timeout */
- rc_wait_CCR(bp); /* Wait for CCR ready */
- rc_out(bp, CD180_CCR, CCR_HARDRESET); /* Reset CD180 chip */
+ rc_out(bp, RC_CTOUT, 0); /* Clear timeout */
+ rc_wait_CCR(bp); /* Wait for CCR ready */
+ rc_out(bp, CD180_CCR, CCR_HARDRESET); /* Reset CD180 chip */
spin_unlock_irqrestore(&riscom_lock, flags);
- msleep(50); /* Delay 0.05 sec */
+ msleep(50); /* Delay 0.05 sec */
spin_lock_irqsave(&riscom_lock, flags);
- rc_out(bp, CD180_GIVR, RC_ID); /* Set ID for this chip */
- rc_out(bp, CD180_GICR, 0); /* Clear all bits */
- rc_out(bp, CD180_PILR1, RC_ACK_MINT); /* Prio for modem intr */
- rc_out(bp, CD180_PILR2, RC_ACK_TINT); /* Prio for transmitter intr */
- rc_out(bp, CD180_PILR3, RC_ACK_RINT); /* Prio for receiver intr */
-
+ rc_out(bp, CD180_GIVR, RC_ID); /* Set ID for this chip */
+ rc_out(bp, CD180_GICR, 0); /* Clear all bits */
+ rc_out(bp, CD180_PILR1, RC_ACK_MINT); /* Prio for modem intr */
+ rc_out(bp, CD180_PILR2, RC_ACK_TINT); /* Prio for tx intr */
+ rc_out(bp, CD180_PILR3, RC_ACK_RINT); /* Prio for rx intr */
+
/* Setting up prescaler. We need 4 ticks per 1 ms */
rc_out(bp, CD180_PPRH, (RC_OSCFREQ/(1000000/RISCOM_TPS)) >> 8);
rc_out(bp, CD180_PPRL, (RC_OSCFREQ/(1000000/RISCOM_TPS)) & 0xff);
-
+
spin_unlock_irqrestore(&riscom_lock, flags);
}
unsigned char val1, val2;
int irqs = 0;
int retries;
-
+
bp->irq = 0;
if (rc_request_io_range(bp))
return 1;
-
+
/* Are the I/O ports here ? */
rc_out(bp, CD180_PPRL, 0x5a);
outb(0xff, 0x80);
rc_out(bp, CD180_PPRL, 0xa5);
outb(0x00, 0x80);
val2 = rc_in(bp, CD180_PPRL);
-
+
if ((val1 != 0x5a) || (val2 != 0xa5)) {
printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not found.\n",
board_No(bp), bp->base);
goto out_release;
}
-
+
/* It's time to find IRQ for this board */
- for (retries = 0; retries < 5 && irqs <= 0; retries++) {
+ for (retries = 0; retries < 5 && irqs <= 0; retries++) {
irqs = probe_irq_on();
- rc_init_CD180(bp); /* Reset CD180 chip */
- rc_out(bp, CD180_CAR, 2); /* Select port 2 */
+ rc_init_CD180(bp); /* Reset CD180 chip */
+ rc_out(bp, CD180_CAR, 2); /* Select port 2 */
rc_wait_CCR(bp);
- rc_out(bp, CD180_CCR, CCR_TXEN); /* Enable transmitter */
- rc_out(bp, CD180_IER, IER_TXRDY); /* Enable tx empty intr */
+ rc_out(bp, CD180_CCR, CCR_TXEN); /* Enable transmitter */
+ rc_out(bp, CD180_IER, IER_TXRDY);/* Enable tx empty intr */
msleep(50);
irqs = probe_irq_off(irqs);
- val1 = rc_in(bp, RC_BSR); /* Get Board Status reg */
- val2 = rc_in(bp, RC_ACK_TINT); /* ACK interrupt */
- rc_init_CD180(bp); /* Reset CD180 again */
-
+ val1 = rc_in(bp, RC_BSR); /* Get Board Status reg */
+ val2 = rc_in(bp, RC_ACK_TINT); /* ACK interrupt */
+ rc_init_CD180(bp); /* Reset CD180 again */
+
if ((val1 & RC_BSR_TINT) || (val2 != (RC_ID | GIVR_IT_TX))) {
printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not "
"found.\n", board_No(bp), bp->base);
goto out_release;
}
}
-
+
if (irqs <= 0) {
printk(KERN_ERR "rc%d: Can't find IRQ for RISCom/8 board "
"at 0x%03x.\n", board_No(bp), bp->base);
}
bp->irq = irqs;
bp->flags |= RC_BOARD_PRESENT;
-
+
printk(KERN_INFO "rc%d: RISCom/8 Rev. %c board detected at "
"0x%03x, IRQ %d.\n",
board_No(bp),
(rc_in(bp, CD180_GFRCR) & 0x0f) + 'A', /* Board revision */
bp->base, bp->irq);
-
+
return 0;
out_release:
rc_release_io_range(bp);
return 1;
}
-/*
- *
+/*
+ *
* Interrupt processing routines.
- *
+ *
*/
-static inline struct riscom_port * rc_get_port(struct riscom_board const * bp,
- unsigned char const * what)
+static struct riscom_port *rc_get_port(struct riscom_board const *bp,
+ unsigned char const *what)
{
unsigned char channel;
- struct riscom_port * port;
-
+ struct riscom_port *port;
+
channel = rc_in(bp, CD180_GICR) >> GICR_CHAN_OFF;
if (channel < CD180_NCH) {
port = &rc_port[board_No(bp) * RC_NPORT + channel];
- if (port->flags & ASYNC_INITIALIZED) {
+ if (port->flags & ASYNC_INITIALIZED)
return port;
- }
}
- printk(KERN_ERR "rc%d: %s interrupt from invalid port %d\n",
+ printk(KERN_ERR "rc%d: %s interrupt from invalid port %d\n",
board_No(bp), what, channel);
return NULL;
}
-static inline void rc_receive_exc(struct riscom_board const * bp)
+static void rc_receive_exc(struct riscom_board const *bp)
{
struct riscom_port *port;
struct tty_struct *tty;
unsigned char status;
unsigned char ch, flag;
-
- if (!(port = rc_get_port(bp, "Receive")))
+
+ port = rc_get_port(bp, "Receive");
+ if (port == NULL)
return;
tty = port->tty;
-
-#ifdef RC_REPORT_OVERRUN
+
+#ifdef RC_REPORT_OVERRUN
status = rc_in(bp, CD180_RCSR);
if (status & RCSR_OE)
port->overrun++;
status &= port->mark_mask;
-#else
+#else
status = rc_in(bp, CD180_RCSR) & port->mark_mask;
-#endif
+#endif
ch = rc_in(bp, CD180_RDR);
- if (!status) {
+ if (!status)
return;
- }
if (status & RCSR_TOUT) {
printk(KERN_WARNING "rc%d: port %d: Receiver timeout. "
- "Hardware problems ?\n",
+ "Hardware problems ?\n",
board_No(bp), port_No(port));
return;
-
+
} else if (status & RCSR_BREAK) {
printk(KERN_INFO "rc%d: port %d: Handling break...\n",
board_No(bp), port_No(port));
flag = TTY_BREAK;
if (port->flags & ASYNC_SAK)
do_SAK(tty);
-
- } else if (status & RCSR_PE)
+
+ } else if (status & RCSR_PE)
flag = TTY_PARITY;
-
- else if (status & RCSR_FE)
+
+ else if (status & RCSR_FE)
flag = TTY_FRAME;
-
- else if (status & RCSR_OE)
+
+ else if (status & RCSR_OE)
flag = TTY_OVERRUN;
-
else
flag = TTY_NORMAL;
-
+
tty_insert_flip_char(tty, ch, flag);
tty_flip_buffer_push(tty);
}
-static inline void rc_receive(struct riscom_board const * bp)
+static void rc_receive(struct riscom_board const *bp)
{
struct riscom_port *port;
struct tty_struct *tty;
unsigned char count;
-
- if (!(port = rc_get_port(bp, "Receive")))
+
+ port = rc_get_port(bp, "Receive");
+ if (port == NULL)
return;
-
+
tty = port->tty;
-
+
count = rc_in(bp, CD180_RDCR);
-
+
#ifdef RC_REPORT_FIFO
port->hits[count > 8 ? 9 : count]++;
-#endif
-
+#endif
+
while (count--) {
if (tty_buffer_request_room(tty, 1) == 0) {
printk(KERN_WARNING "rc%d: port %d: Working around "
tty_flip_buffer_push(tty);
}
-static inline void rc_transmit(struct riscom_board const * bp)
+static void rc_transmit(struct riscom_board const *bp)
{
struct riscom_port *port;
struct tty_struct *tty;
unsigned char count;
-
-
- if (!(port = rc_get_port(bp, "Transmit")))
+
+ port = rc_get_port(bp, "Transmit");
+ if (port == NULL)
return;
-
+
tty = port->tty;
-
- if (port->IER & IER_TXEMPTY) {
+
+ if (port->IER & IER_TXEMPTY) {
/* FIFO drained */
rc_out(bp, CD180_CAR, port_No(port));
port->IER &= ~IER_TXEMPTY;
rc_out(bp, CD180_IER, port->IER);
return;
}
-
+
if ((port->xmit_cnt <= 0 && !port->break_length)
|| tty->stopped || tty->hw_stopped) {
rc_out(bp, CD180_CAR, port_No(port));
rc_out(bp, CD180_IER, port->IER);
return;
}
-
+
if (port->break_length) {
if (port->break_length > 0) {
if (port->COR2 & COR2_ETC) {
rc_out(bp, CD180_TDR, CD180_C_ESC);
rc_out(bp, CD180_TDR, CD180_C_DELAY);
rc_out(bp, CD180_TDR, count);
- if (!(port->break_length -= count))
+ port->break_length -= count;
+ if (port->break_length == 0)
port->break_length--;
} else {
rc_out(bp, CD180_TDR, CD180_C_ESC);
}
return;
}
-
+
count = CD180_NFIFO;
do {
rc_out(bp, CD180_TDR, port->xmit_buf[port->xmit_tail++]);
if (--port->xmit_cnt <= 0)
break;
} while (--count > 0);
-
+
if (port->xmit_cnt <= 0) {
rc_out(bp, CD180_CAR, port_No(port));
port->IER &= ~IER_TXRDY;
tty_wakeup(tty);
}
-static inline void rc_check_modem(struct riscom_board const * bp)
+static void rc_check_modem(struct riscom_board const *bp)
{
struct riscom_port *port;
struct tty_struct *tty;
unsigned char mcr;
-
- if (!(port = rc_get_port(bp, "Modem")))
+
+ port = rc_get_port(bp, "Modem");
+ if (port == NULL)
return;
-
+
tty = port->tty;
-
+
mcr = rc_in(bp, CD180_MCR);
- if (mcr & MCR_CDCHG) {
- if (rc_in(bp, CD180_MSVR) & MSVR_CD)
+ if (mcr & MCR_CDCHG) {
+ if (rc_in(bp, CD180_MSVR) & MSVR_CD)
wake_up_interruptible(&port->open_wait);
else
tty_hangup(tty);
}
-
+
#ifdef RISCOM_BRAIN_DAMAGED_CTS
if (mcr & MCR_CTSCHG) {
if (rc_in(bp, CD180_MSVR) & MSVR_CTS) {
rc_out(bp, CD180_IER, port->IER);
}
#endif /* RISCOM_BRAIN_DAMAGED_CTS */
-
+
/* Clear change bits */
rc_out(bp, CD180_MCR, 0);
}
/* The main interrupt processing routine */
-static irqreturn_t rc_interrupt(int dummy, void * dev_id)
+static irqreturn_t rc_interrupt(int dummy, void *dev_id)
{
unsigned char status;
unsigned char ack;
(RC_BSR_TOUT | RC_BSR_TINT |
RC_BSR_MINT | RC_BSR_RINT))) {
handled = 1;
- if (status & RC_BSR_TOUT)
+ if (status & RC_BSR_TOUT)
printk(KERN_WARNING "rc%d: Got timeout. Hardware "
"error?\n", board_No(bp));
-
else if (status & RC_BSR_RINT) {
ack = rc_in(bp, RC_ACK_RINT);
-
if (ack == (RC_ID | GIVR_IT_RCV))
rc_receive(bp);
else if (ack == (RC_ID | GIVR_IT_REXC))
printk(KERN_WARNING "rc%d: Bad receive ack "
"0x%02x.\n",
board_No(bp), ack);
-
} else if (status & RC_BSR_TINT) {
ack = rc_in(bp, RC_ACK_TINT);
-
if (ack == (RC_ID | GIVR_IT_TX))
rc_transmit(bp);
else
printk(KERN_WARNING "rc%d: Bad transmit ack "
"0x%02x.\n",
board_No(bp), ack);
-
} else /* if (status & RC_BSR_MINT) */ {
ack = rc_in(bp, RC_ACK_MINT);
-
- if (ack == (RC_ID | GIVR_IT_MODEM))
+ if (ack == (RC_ID | GIVR_IT_MODEM))
rc_check_modem(bp);
else
printk(KERN_WARNING "rc%d: Bad modem ack "
"0x%02x.\n",
board_No(bp), ack);
-
- }
-
+ }
rc_out(bp, CD180_EOIR, 0); /* Mark end of interrupt */
rc_out(bp, RC_CTOUT, 0); /* Clear timeout flag */
}
*/
/* Called with disabled interrupts */
-static int rc_setup_board(struct riscom_board * bp)
+static int rc_setup_board(struct riscom_board *bp)
{
int error;
- if (bp->flags & RC_BOARD_ACTIVE)
+ if (bp->flags & RC_BOARD_ACTIVE)
return 0;
-
+
error = request_irq(bp->irq, rc_interrupt, IRQF_DISABLED,
"RISCom/8", bp);
- if (error)
+ if (error)
return error;
-
+
rc_out(bp, RC_CTOUT, 0); /* Just in case */
bp->DTR = ~0;
rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */
-
+
bp->flags |= RC_BOARD_ACTIVE;
-
+
return 0;
}
{
if (!(bp->flags & RC_BOARD_ACTIVE))
return;
-
+
bp->flags &= ~RC_BOARD_ACTIVE;
-
+
free_irq(bp->irq, NULL);
-
+
bp->DTR = ~0;
rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */
-
+
}
/*
- * Setting up port characteristics.
+ * Setting up port characteristics.
* Must be called with disabled interrupts
*/
static void rc_change_speed(struct riscom_board *bp, struct riscom_port *port)
{
- struct tty_struct *tty;
+ struct tty_struct *tty = port->tty;
unsigned long baud;
long tmp;
unsigned char cor1 = 0, cor3 = 0;
unsigned char mcor1 = 0, mcor2 = 0;
-
- if (!(tty = port->tty) || !tty->termios)
+
+ if (tty == NULL || tty->termios == NULL)
return;
port->IER = 0;
port->COR2 = 0;
port->MSVR = MSVR_RTS;
-
+
baud = tty_get_baud_rate(tty);
-
+
/* Select port on the board */
rc_out(bp, CD180_CAR, port_No(port));
-
+
if (!baud) {
/* Drop DTR & exit */
bp->DTR |= (1u << port_No(port));
bp->DTR &= ~(1u << port_No(port));
rc_out(bp, RC_DTR, bp->DTR);
}
-
+
/*
- * Now we must calculate some speed depended things
+ * Now we must calculate some speed depended things
*/
-
+
/* Set baud rate for port */
tmp = (((RC_OSCFREQ + baud/2) / baud +
CD180_TPC/2) / CD180_TPC);
- rc_out(bp, CD180_RBPRH, (tmp >> 8) & 0xff);
- rc_out(bp, CD180_TBPRH, (tmp >> 8) & 0xff);
- rc_out(bp, CD180_RBPRL, tmp & 0xff);
+ rc_out(bp, CD180_RBPRH, (tmp >> 8) & 0xff);
+ rc_out(bp, CD180_TBPRH, (tmp >> 8) & 0xff);
+ rc_out(bp, CD180_RBPRL, tmp & 0xff);
rc_out(bp, CD180_TBPRL, tmp & 0xff);
-
+
baud = (baud + 5) / 10; /* Estimated CPS */
-
+
/* Two timer ticks seems enough to wakeup something like SLIP driver */
- tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO;
+ tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO;
port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ?
SERIAL_XMIT_SIZE - 1 : tmp);
-
+
/* Receiver timeout will be transmission time for 1.5 chars */
tmp = (RISCOM_TPS + RISCOM_TPS/2 + baud/2) / baud;
tmp = (tmp > 0xff) ? 0xff : tmp;
rc_out(bp, CD180_RTPR, tmp);
-
- switch (C_CSIZE(tty)) {
- case CS5:
+
+ switch (C_CSIZE(tty)) {
+ case CS5:
cor1 |= COR1_5BITS;
break;
- case CS6:
+ case CS6:
cor1 |= COR1_6BITS;
break;
- case CS7:
+ case CS7:
cor1 |= COR1_7BITS;
break;
- case CS8:
+ case CS8:
cor1 |= COR1_8BITS;
break;
}
-
- if (C_CSTOPB(tty))
+ if (C_CSTOPB(tty))
cor1 |= COR1_2SB;
-
+
cor1 |= COR1_IGNORE;
- if (C_PARENB(tty)) {
+ if (C_PARENB(tty)) {
cor1 |= COR1_NORMPAR;
- if (C_PARODD(tty))
+ if (C_PARODD(tty))
cor1 |= COR1_ODDP;
- if (I_INPCK(tty))
+ if (I_INPCK(tty))
cor1 &= ~COR1_IGNORE;
}
/* Set marking of some errors */
port->mark_mask = RCSR_OE | RCSR_TOUT;
- if (I_INPCK(tty))
+ if (I_INPCK(tty))
port->mark_mask |= RCSR_FE | RCSR_PE;
- if (I_BRKINT(tty) || I_PARMRK(tty))
+ if (I_BRKINT(tty) || I_PARMRK(tty))
port->mark_mask |= RCSR_BREAK;
- if (I_IGNPAR(tty))
+ if (I_IGNPAR(tty))
port->mark_mask &= ~(RCSR_FE | RCSR_PE);
- if (I_IGNBRK(tty)) {
+ if (I_IGNBRK(tty)) {
port->mark_mask &= ~RCSR_BREAK;
- if (I_IGNPAR(tty))
+ if (I_IGNPAR(tty))
/* Real raw mode. Ignore all */
port->mark_mask &= ~RCSR_OE;
}
port->IER |= IER_DSR | IER_CTS;
mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD;
mcor2 |= MCOR2_DSROD | MCOR2_CTSOD;
- tty->hw_stopped = !(rc_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR));
+ tty->hw_stopped = !(rc_in(bp, CD180_MSVR) &
+ (MSVR_CTS|MSVR_DSR));
#else
port->COR2 |= COR2_CTSAE;
#endif
mcor1 |= MCOR1_CDZD;
mcor2 |= MCOR2_CDOD;
}
-
- if (C_CREAD(tty))
+
+ if (C_CREAD(tty))
/* Enable receiver */
port->IER |= IER_RXD;
-
+
/* Set input FIFO size (1-8 bytes) */
- cor3 |= RISCOM_RXFIFO;
+ cor3 |= RISCOM_RXFIFO;
/* Setting up CD180 channel registers */
rc_out(bp, CD180_COR1, cor1);
rc_out(bp, CD180_COR2, port->COR2);
static int rc_setup_port(struct riscom_board *bp, struct riscom_port *port)
{
unsigned long flags;
-
+
if (port->flags & ASYNC_INITIALIZED)
return 0;
-
+
if (!port->xmit_buf) {
/* We may sleep in get_zeroed_page() */
- unsigned long tmp;
-
- if (!(tmp = get_zeroed_page(GFP_KERNEL)))
+ unsigned long tmp = get_zeroed_page(GFP_KERNEL);
+ if (tmp == 0)
return -ENOMEM;
-
- if (port->xmit_buf) {
+ if (port->xmit_buf)
free_page(tmp);
- return -ERESTARTSYS;
- }
- port->xmit_buf = (unsigned char *) tmp;
+ else
+ port->xmit_buf = (unsigned char *) tmp;
}
-
spin_lock_irqsave(&riscom_lock, flags);
- if (port->tty)
+ if (port->tty)
clear_bit(TTY_IO_ERROR, &port->tty->flags);
-
- if (port->count == 1)
+ if (port->count == 1)
bp->count++;
-
port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
rc_change_speed(bp, port);
port->flags |= ASYNC_INITIALIZED;
-
+
spin_unlock_irqrestore(&riscom_lock, flags);
return 0;
}
static void rc_shutdown_port(struct riscom_board *bp, struct riscom_port *port)
{
struct tty_struct *tty;
-
- if (!(port->flags & ASYNC_INITIALIZED))
+
+ if (!(port->flags & ASYNC_INITIALIZED))
return;
-
+
#ifdef RC_REPORT_OVERRUN
printk(KERN_INFO "rc%d: port %d: Total %ld overruns were detected.\n",
board_No(bp), port_No(port), port->overrun);
-#endif
+#endif
#ifdef RC_REPORT_FIFO
{
int i;
-
+
printk(KERN_INFO "rc%d: port %d: FIFO hits [ ",
board_No(bp), port_No(port));
- for (i = 0; i < 10; i++) {
+ for (i = 0; i < 10; i++)
printk("%ld ", port->hits[i]);
- }
printk("].\n");
}
-#endif
+#endif
if (port->xmit_buf) {
free_page((unsigned long) port->xmit_buf);
port->xmit_buf = NULL;
}
- if (!(tty = port->tty) || C_HUPCL(tty)) {
+ tty = port->tty;
+
+ if (tty == NULL || C_HUPCL(tty)) {
/* Drop DTR */
bp->DTR |= (1u << port_No(port));
rc_out(bp, RC_DTR, bp->DTR);
}
-
- /* Select port */
+
+ /* Select port */
rc_out(bp, CD180_CAR, port_No(port));
/* Reset port */
rc_wait_CCR(bp);
/* Disable all interrupts from this port */
port->IER = 0;
rc_out(bp, CD180_IER, port->IER);
-
- if (tty)
+
+ if (tty)
set_bit(TTY_IO_ERROR, &tty->flags);
port->flags &= ~ASYNC_INITIALIZED;
-
+
if (--bp->count < 0) {
printk(KERN_INFO "rc%d: rc_shutdown_port: "
"bad board count: %d\n",
board_No(bp), bp->count);
bp->count = 0;
}
-
/*
* If this is the last opened port on the board
* shutdown whole board
*/
- if (!bp->count)
+ if (!bp->count)
rc_shutdown_board(bp);
}
-
-static int block_til_ready(struct tty_struct *tty, struct file * filp,
+static int block_til_ready(struct tty_struct *tty, struct file *filp,
struct riscom_port *port)
{
DECLARE_WAITQUEUE(wait, current);
return 0;
}
- if (C_CLOCAL(tty))
+ if (C_CLOCAL(tty))
do_clocal = 1;
/*
if (port->flags & ASYNC_HUP_NOTIFY)
retval = -EAGAIN;
else
- retval = -ERESTARTSYS;
+ retval = -ERESTARTSYS;
break;
}
if (!(port->flags & ASYNC_CLOSING) &&
port->blocked_open--;
if (retval)
return retval;
-
+
port->flags |= ASYNC_NORMAL_ACTIVE;
return 0;
-}
+}
-static int rc_open(struct tty_struct * tty, struct file * filp)
+static int rc_open(struct tty_struct *tty, struct file *filp)
{
int board;
int error;
- struct riscom_port * port;
- struct riscom_board * bp;
-
+ struct riscom_port *port;
+ struct riscom_board *bp;
+
board = RC_BOARD(tty->index);
if (board >= RC_NBOARD || !(rc_board[board].flags & RC_BOARD_PRESENT))
return -ENODEV;
-
+
bp = &rc_board[board];
port = rc_port + board * RC_NPORT + RC_PORT(tty->index);
if (rc_paranoia_check(port, tty->name, "rc_open"))
return -ENODEV;
-
- if ((error = rc_setup_board(bp)))
+
+ error = rc_setup_board(bp);
+ if (error)
return error;
-
+
port->count++;
tty->driver_data = port;
port->tty = tty;
-
- if ((error = rc_setup_port(bp, port)))
- return error;
-
- if ((error = block_til_ready(tty, filp, port)))
- return error;
-
- return 0;
+
+ error = rc_setup_port(bp, port);
+ if (error == 0)
+ error = block_til_ready(tty, filp, port);
+ return error;
}
static void rc_flush_buffer(struct tty_struct *tty)
return;
spin_lock_irqsave(&riscom_lock, flags);
-
port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
-
spin_unlock_irqrestore(&riscom_lock, flags);
tty_wakeup(tty);
}
-
-static void rc_close(struct tty_struct * tty, struct file * filp)
+static void rc_close(struct tty_struct *tty, struct file *filp)
{
struct riscom_port *port = (struct riscom_port *) tty->driver_data;
struct riscom_board *bp;
unsigned long flags;
unsigned long timeout;
-
+
if (!port || rc_paranoia_check(port, tty->name, "close"))
return;
if (tty_hung_up_p(filp))
goto out;
-
+
bp = port_Board(port);
if ((tty->count == 1) && (port->count != 1)) {
printk(KERN_INFO "rc%d: rc_close: bad port count;"
goto out;
port->flags |= ASYNC_CLOSING;
/*
- * Now we wait for the transmit buffer to clear; and we notify
+ * Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
* has completely drained; this is especially
* important if there is a transmit FIFO!
*/
- timeout = jiffies+HZ;
- while(port->IER & IER_TXEMPTY) {
+ timeout = jiffies + HZ;
+ while (port->IER & IER_TXEMPTY) {
msleep_interruptible(jiffies_to_msecs(port->timeout));
if (time_after(jiffies, timeout))
break;
tty->closing = 0;
port->tty = NULL;
if (port->blocked_open) {
- if (port->close_delay) {
+ if (port->close_delay)
msleep_interruptible(jiffies_to_msecs(port->close_delay));
- }
wake_up_interruptible(&port->open_wait);
}
port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
spin_unlock_irqrestore(&riscom_lock, flags);
}
-static int rc_write(struct tty_struct * tty,
+static int rc_write(struct tty_struct *tty,
const unsigned char *buf, int count)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
struct riscom_board *bp;
int c, total = 0;
unsigned long flags;
-
+
if (rc_paranoia_check(port, tty->name, "rc_write"))
return 0;
-
+
bp = port_Board(port);
if (!tty || !port->xmit_buf)
return total;
}
-static int rc_put_char(struct tty_struct * tty, unsigned char ch)
+static int rc_put_char(struct tty_struct *tty, unsigned char ch)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
unsigned long flags;
return 0;
spin_lock_irqsave(&riscom_lock, flags);
-
+
if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
goto out;
return ret;
}
-static void rc_flush_chars(struct tty_struct * tty)
+static void rc_flush_chars(struct tty_struct *tty)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
unsigned long flags;
-
+
if (rc_paranoia_check(port, tty->name, "rc_flush_chars"))
return;
-
+
if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
!port->xmit_buf)
return;
spin_unlock_irqrestore(&riscom_lock, flags);
}
-static int rc_write_room(struct tty_struct * tty)
+static int rc_write_room(struct tty_struct *tty)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
int ret;
-
+
if (rc_paranoia_check(port, tty->name, "rc_write_room"))
return 0;
static int rc_chars_in_buffer(struct tty_struct *tty)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
-
+
if (rc_paranoia_check(port, tty->name, "rc_chars_in_buffer"))
return 0;
-
+
return port->xmit_cnt;
}
static int rc_tiocmget(struct tty_struct *tty, struct file *file)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
- struct riscom_board * bp;
+ struct riscom_board *bp;
unsigned char status;
unsigned int result;
unsigned long flags;
return 0;
}
-static inline void rc_send_break(struct riscom_port * port, unsigned long length)
+static void rc_send_break(struct riscom_port *port, unsigned long length)
{
struct riscom_board *bp = port_Board(port);
unsigned long flags;
-
+
spin_lock_irqsave(&riscom_lock, flags);
port->break_length = RISCOM_TPS / HZ * length;
spin_unlock_irqrestore(&riscom_lock, flags);
}
-static inline int rc_set_serial_info(struct riscom_port * port,
- struct serial_struct __user * newinfo)
+static int rc_set_serial_info(struct riscom_port *port,
+ struct serial_struct __user *newinfo)
{
struct serial_struct tmp;
struct riscom_board *bp = port_Board(port);
int change_speed;
-
+
if (copy_from_user(&tmp, newinfo, sizeof(tmp)))
return -EFAULT;
-
-#if 0
+
+#if 0
if ((tmp.irq != bp->irq) ||
(tmp.port != bp->base) ||
(tmp.type != PORT_CIRRUS) ||
(tmp.xmit_fifo_size != CD180_NFIFO) ||
(tmp.flags & ~RISCOM_LEGAL_FLAGS))
return -EINVAL;
-#endif
-
+#endif
+
change_speed = ((port->flags & ASYNC_SPD_MASK) !=
(tmp.flags & ASYNC_SPD_MASK));
-
+
if (!capable(CAP_SYS_ADMIN)) {
if ((tmp.close_delay != port->close_delay) ||
(tmp.closing_wait != port->closing_wait) ||
((tmp.flags & ~ASYNC_USR_MASK) !=
- (port->flags & ~ASYNC_USR_MASK)))
+ (port->flags & ~ASYNC_USR_MASK)))
return -EPERM;
port->flags = ((port->flags & ~ASYNC_USR_MASK) |
(tmp.flags & ASYNC_USR_MASK));
return 0;
}
-static inline int rc_get_serial_info(struct riscom_port * port,
+static int rc_get_serial_info(struct riscom_port *port,
struct serial_struct __user *retinfo)
{
struct serial_struct tmp;
struct riscom_board *bp = port_Board(port);
-
+
memset(&tmp, 0, sizeof(tmp));
tmp.type = PORT_CIRRUS;
tmp.line = port - rc_port;
return copy_to_user(retinfo, &tmp, sizeof(tmp)) ? -EFAULT : 0;
}
-static int rc_ioctl(struct tty_struct * tty, struct file * filp,
+static int rc_ioctl(struct tty_struct *tty, struct file *filp,
unsigned int cmd, unsigned long arg)
-
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
void __user *argp = (void __user *)arg;
int retval = 0;
-
+
if (rc_paranoia_check(port, tty->name, "rc_ioctl"))
return -ENODEV;
-
+
switch (cmd) {
- case TCSBRK: /* SVID version: non-zero arg --> no break */
+ case TCSBRK: /* SVID version: non-zero arg --> no break */
retval = tty_check_change(tty);
if (retval)
return retval;
if (!arg)
rc_send_break(port, HZ/4); /* 1/4 second */
break;
- case TCSBRKP: /* support for POSIX tcsendbreak() */
+ case TCSBRKP: /* support for POSIX tcsendbreak() */
retval = tty_check_change(tty);
if (retval)
return retval;
tty_wait_until_sent(tty, 0);
rc_send_break(port, arg ? arg*(HZ/10) : HZ/4);
break;
- case TIOCGSERIAL:
- lock_kernel();
+ case TIOCGSERIAL:
+ lock_kernel();
retval = rc_get_serial_info(port, argp);
unlock_kernel();
break;
- case TIOCSSERIAL:
- lock_kernel();
+ case TIOCSSERIAL:
+ lock_kernel();
retval = rc_set_serial_info(port, argp);
unlock_kernel();
break;
- default:
+ default:
retval = -ENOIOCTLCMD;
}
return retval;
}
-static void rc_throttle(struct tty_struct * tty)
+static void rc_throttle(struct tty_struct *tty)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
struct riscom_board *bp;
unsigned long flags;
-
+
if (rc_paranoia_check(port, tty->name, "rc_throttle"))
return;
-
bp = port_Board(port);
spin_lock_irqsave(&riscom_lock, flags);
-
port->MSVR &= ~MSVR_RTS;
rc_out(bp, CD180_CAR, port_No(port));
if (I_IXOFF(tty)) {
rc_wait_CCR(bp);
}
rc_out(bp, CD180_MSVR, port->MSVR);
-
spin_unlock_irqrestore(&riscom_lock, flags);
}
-static void rc_unthrottle(struct tty_struct * tty)
+static void rc_unthrottle(struct tty_struct *tty)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
struct riscom_board *bp;
unsigned long flags;
-
+
if (rc_paranoia_check(port, tty->name, "rc_unthrottle"))
return;
-
bp = port_Board(port);
-
- spin_lock_irqsave(&riscom_lock, flags);
+ spin_lock_irqsave(&riscom_lock, flags);
port->MSVR |= MSVR_RTS;
rc_out(bp, CD180_CAR, port_No(port));
if (I_IXOFF(tty)) {
rc_wait_CCR(bp);
}
rc_out(bp, CD180_MSVR, port->MSVR);
-
spin_unlock_irqrestore(&riscom_lock, flags);
}
-static void rc_stop(struct tty_struct * tty)
+static void rc_stop(struct tty_struct *tty)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
struct riscom_board *bp;
unsigned long flags;
-
+
if (rc_paranoia_check(port, tty->name, "rc_stop"))
return;
-
+
bp = port_Board(port);
-
- spin_lock_irqsave(&riscom_lock, flags);
+ spin_lock_irqsave(&riscom_lock, flags);
port->IER &= ~IER_TXRDY;
rc_out(bp, CD180_CAR, port_No(port));
rc_out(bp, CD180_IER, port->IER);
-
spin_unlock_irqrestore(&riscom_lock, flags);
}
-static void rc_start(struct tty_struct * tty)
+static void rc_start(struct tty_struct *tty)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
struct riscom_board *bp;
unsigned long flags;
-
+
if (rc_paranoia_check(port, tty->name, "rc_start"))
return;
-
+
bp = port_Board(port);
-
+
spin_lock_irqsave(&riscom_lock, flags);
- if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) {
+ if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) {
port->IER |= IER_TXRDY;
rc_out(bp, CD180_CAR, port_No(port));
rc_out(bp, CD180_IER, port->IER);
}
-
spin_unlock_irqrestore(&riscom_lock, flags);
}
-static void rc_hangup(struct tty_struct * tty)
+static void rc_hangup(struct tty_struct *tty)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
struct riscom_board *bp;
-
+
if (rc_paranoia_check(port, tty->name, "rc_hangup"))
return;
-
+
bp = port_Board(port);
-
+
rc_shutdown_port(bp, port);
port->count = 0;
port->flags &= ~ASYNC_NORMAL_ACTIVE;
wake_up_interruptible(&port->open_wait);
}
-static void rc_set_termios(struct tty_struct * tty, struct ktermios * old_termios)
+static void rc_set_termios(struct tty_struct *tty,
+ struct ktermios *old_termios)
{
struct riscom_port *port = (struct riscom_port *)tty->driver_data;
unsigned long flags;
-
+
if (rc_paranoia_check(port, tty->name, "rc_set_termios"))
return;
-
- if (tty->termios->c_cflag == old_termios->c_cflag &&
- tty->termios->c_iflag == old_termios->c_iflag)
- return;
spin_lock_irqsave(&riscom_lock, flags);
rc_change_speed(port_Board(port), port);
int i;
riscom_driver = alloc_tty_driver(RC_NBOARD * RC_NPORT);
- if (!riscom_driver)
+ if (!riscom_driver)
return -ENOMEM;
-
+
riscom_driver->owner = THIS_MODULE;
riscom_driver->name = "ttyL";
riscom_driver->major = RISCOM8_NORMAL_MAJOR;
riscom_driver->init_termios.c_ospeed = 9600;
riscom_driver->flags = TTY_DRIVER_REAL_RAW;
tty_set_operations(riscom_driver, &riscom_ops);
- if ((error = tty_register_driver(riscom_driver))) {
+ error = tty_register_driver(riscom_driver);
+ if (error != 0) {
put_tty_driver(riscom_driver);
printk(KERN_ERR "rc: Couldn't register RISCom/8 driver, "
- "error = %d\n",
- error);
+ "error = %d\n", error);
return 1;
}
-
memset(rc_port, 0, sizeof(rc_port));
for (i = 0; i < RC_NPORT * RC_NBOARD; i++) {
rc_port[i].magic = RISCOM8_MAGIC;
- rc_port[i].close_delay = 50 * HZ/100;
- rc_port[i].closing_wait = 3000 * HZ/100;
+ rc_port[i].close_delay = 50 * HZ / 100;
+ rc_port[i].closing_wait = 3000 * HZ / 100;
init_waitqueue_head(&rc_port[i].open_wait);
init_waitqueue_head(&rc_port[i].close_wait);
}
-
return 0;
}
#ifndef MODULE
/*
* Called at boot time.
- *
+ *
* You can specify IO base for up to RC_NBOARD cards,
* using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt.
* Note that there will be no probing at default
* addresses in this case.
*
- */
+ */
static int __init riscom8_setup(char *str)
{
int ints[RC_NBOARD];
for (i = 0; i < RC_NBOARD; i++) {
if (i < ints[0])
rc_board[i].base = ints[i+1];
- else
+ else
rc_board[i].base = 0;
}
return 1;
static char no_boards_msg[] __initdata =
KERN_INFO "rc: No RISCom/8 boards detected.\n";
-/*
- * This routine must be called by kernel at boot time
+/*
+ * This routine must be called by kernel at boot time
*/
static int __init riscom8_init(void)
{
printk(banner);
- if (rc_init_drivers())
+ if (rc_init_drivers())
return -EIO;
- for (i = 0; i < RC_NBOARD; i++)
- if (rc_board[i].base && !rc_probe(&rc_board[i]))
+ for (i = 0; i < RC_NBOARD; i++)
+ if (rc_board[i].base && !rc_probe(&rc_board[i]))
found++;
-
if (!found) {
rc_release_drivers();
printk(no_boards_msg);
* by specifying "iobase=0xXXX iobase1=0xXXX ..." as insmod parameter.
*
*/
-static int __init riscom8_init_module (void)
+static int __init riscom8_init_module(void)
{
#ifdef MODULE
int i;
if (iobase || iobase1 || iobase2 || iobase3) {
- for(i = 0; i < RC_NBOARD; i++)
+ for (i = 0; i < RC_NBOARD; i++)
rc_board[i].base = 0;
}
return riscom8_init();
}
-
-static void __exit riscom8_exit_module (void)
+
+static void __exit riscom8_exit_module(void)
{
int i;
-
+
rc_release_drivers();
- for (i = 0; i < RC_NBOARD; i++)
- if (rc_board[i].flags & RC_BOARD_PRESENT)
+ for (i = 0; i < RC_NBOARD; i++)
+ if (rc_board[i].flags & RC_BOARD_PRESENT)
rc_release_io_range(&rc_board[i]);
-
+
}
module_init(riscom8_init_module);
module_exit(riscom8_exit_module);
-
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff