+++ /dev/null
-/* $Id: aurora.c,v 1.19 2002/01/08 16:00:16 davem Exp $
- * linux/drivers/sbus/char/aurora.c -- Aurora multiport driver
- *
- * Copyright (c) 1999 by Oliver Aldulea (oli at bv dot ro)
- *
- * This code is based on the RISCom/8 multiport serial driver written
- * by Dmitry Gorodchanin (pgmdsg@ibi.com), based on the Linux serial
- * driver, written by Linus Torvalds, Theodore T'so and others.
- * The Aurora multiport programming info was obtained mainly from the
- * Cirrus Logic CD180 documentation (available on the web), and by
- * doing heavy tests on the board. Many thanks to Eddie C. Dost for the
- * help on the sbus interface.
- *
- * 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.
- *
- * Revision 1.0
- *
- * This is the first public release.
- *
- * Most of the information you need is in the aurora.h file. Please
- * read that file before reading this one.
- *
- * Several parts of the code do not have comments yet.
- *
- * n.b. The board can support 115.2 bit rates, but only on a few
- * ports. The total badwidth of one chip (ports 0-7 or 8-15) is equal
- * to OSC_FREQ div 16. In case of my board, each chip can take 6
- * channels of 115.2 kbaud. This information is not well-tested.
- *
- * Fixed to use tty_get_baud_rate().
- * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12
- */
-
-#include <linux/module.h>
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#ifdef AURORA_INT_DEBUG
-#include <linux/timer.h>
-#endif
-#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/mm.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/bitops.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/oplib.h>
-#include <asm/system.h>
-#include <asm/kdebug.h>
-#include <asm/sbus.h>
-#include <asm/uaccess.h>
-
-#include "aurora.h"
-#include "cd180.h"
-
-unsigned char irqs[4] = {
- 0, 0, 0, 0
-};
-
-#ifdef AURORA_INT_DEBUG
-int irqhit=0;
-#endif
-
-static struct tty_driver *aurora_driver;
-static struct Aurora_board aurora_board[AURORA_NBOARD] = {
- {0,},
-};
-
-static struct Aurora_port aurora_port[AURORA_TNPORTS] = {
- { 0, },
-};
-
-/* no longer used. static struct Aurora_board * IRQ_to_board[16] = { NULL, } ;*/
-static unsigned char * tmp_buf = NULL;
-
-DECLARE_TASK_QUEUE(tq_aurora);
-
-static inline int aurora_paranoia_check(struct Aurora_port const * port,
- char *name, const char *routine)
-{
-#ifdef AURORA_PARANOIA_CHECK
- static const char *badmagic =
- KERN_DEBUG "aurora: Warning: bad aurora port magic number for device %s in %s\n";
- static const char *badinfo =
- KERN_DEBUG "aurora: Warning: null aurora port for device %s in %s\n";
-
- if (!port) {
- printk(badinfo, name, routine);
- return 1;
- }
- if (port->magic != AURORA_MAGIC) {
- printk(badmagic, name, routine);
- return 1;
- }
-#endif
- return 0;
-}
-
-/*
- *
- * Service functions for aurora driver.
- *
- */
-
-/* Get board number from pointer */
-static inline int board_No (struct Aurora_board const * bp)
-{
- return bp - aurora_board;
-}
-
-/* Get port number from pointer */
-static inline int port_No (struct Aurora_port const * port)
-{
- return AURORA_PORT(port - aurora_port);
-}
-
-/* Get pointer to board from pointer to port */
-static inline struct Aurora_board * port_Board(struct Aurora_port const * port)
-{
- return &aurora_board[AURORA_BOARD(port - aurora_port)];
-}
-
-/* Wait for Channel Command Register ready */
-static inline void aurora_wait_CCR(struct aurora_reg128 * r)
-{
- unsigned long delay;
-
-#ifdef AURORA_DEBUG
-printk("aurora_wait_CCR\n");
-#endif
- /* FIXME: need something more descriptive than 100000 :) */
- for (delay = 100000; delay; delay--)
- if (!sbus_readb(&r->r[CD180_CCR]))
- return;
- printk(KERN_DEBUG "aurora: Timeout waiting for CCR.\n");
-}
-
-/*
- * aurora probe functions.
- */
-
-/* Must be called with enabled interrupts */
-static inline void aurora_long_delay(unsigned long delay)
-{
- unsigned long i;
-
-#ifdef AURORA_DEBUG
- printk("aurora_long_delay: start\n");
-#endif
- for (i = jiffies + delay; time_before(jiffies, i); ) ;
-#ifdef AURORA_DEBUG
- printk("aurora_long_delay: end\n");
-#endif
-}
-
-/* Reset and setup CD180 chip */
-static int aurora_init_CD180(struct Aurora_board * bp, int chip)
-{
- unsigned long flags;
- int id;
-
-#ifdef AURORA_DEBUG
- printk("aurora_init_CD180: start %d:%d\n",
- board_No(bp), chip);
-#endif
- save_flags(flags); cli();
- sbus_writeb(0, &bp->r[chip]->r[CD180_CAR]);
- sbus_writeb(0, &bp->r[chip]->r[CD180_GSVR]);
-
- /* Wait for CCR ready */
- aurora_wait_CCR(bp->r[chip]);
-
- /* Reset CD180 chip */
- sbus_writeb(CCR_HARDRESET, &bp->r[chip]->r[CD180_CCR]);
- udelay(1);
- sti();
- id=1000;
- while((--id) &&
- (sbus_readb(&bp->r[chip]->r[CD180_GSVR])!=0xff))udelay(100);
- if(!id) {
- printk(KERN_ERR "aurora%d: Chip %d failed init.\n",
- board_No(bp), chip);
- restore_flags(flags);
- return(-1);
- }
- cli();
- sbus_writeb((board_No(bp)<<5)|((chip+1)<<3),
- &bp->r[chip]->r[CD180_GSVR]); /* Set ID for this chip */
- sbus_writeb(0x80|bp->ACK_MINT,
- &bp->r[chip]->r[CD180_MSMR]); /* Prio for modem intr */
- sbus_writeb(0x80|bp->ACK_TINT,
- &bp->r[chip]->r[CD180_TSMR]); /* Prio for transmitter intr */
- sbus_writeb(0x80|bp->ACK_RINT,
- &bp->r[chip]->r[CD180_RSMR]); /* Prio for receiver intr */
- /* Setting up prescaler. We need 4 tick per 1 ms */
- sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) >> 8,
- &bp->r[chip]->r[CD180_PPRH]);
- sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) & 0xff,
- &bp->r[chip]->r[CD180_PPRL]);
-
- sbus_writeb(SRCR_AUTOPRI|SRCR_GLOBPRI,
- &bp->r[chip]->r[CD180_SRCR]);
-
- id = sbus_readb(&bp->r[chip]->r[CD180_GFRCR]);
- printk(KERN_INFO "aurora%d: Chip %d id %02x: ",
- board_No(bp), chip,id);
- if(sbus_readb(&bp->r[chip]->r[CD180_SRCR]) & 128) {
- switch (id) {
- case 0x82:printk("CL-CD1864 rev A\n");break;
- case 0x83:printk("CL-CD1865 rev A\n");break;
- case 0x84:printk("CL-CD1865 rev B\n");break;
- case 0x85:printk("CL-CD1865 rev C\n");break;
- default:printk("Unknown.\n");
- };
- } else {
- switch (id) {
- case 0x81:printk("CL-CD180 rev B\n");break;
- case 0x82:printk("CL-CD180 rev C\n");break;
- default:printk("Unknown.\n");
- };
- }
- restore_flags(flags);
-#ifdef AURORA_DEBUG
- printk("aurora_init_CD180: end\n");
-#endif
- return 0;
-}
-
-static int valid_irq(unsigned char irq)
-{
-int i;
-for(i=0;i<TYPE_1_IRQS;i++)
- if (type_1_irq[i]==irq) return 1;
-return 0;
-}
-
-static irqreturn_t aurora_interrupt(int irq, void * dev_id);
-
-/* Main probing routine, also sets irq. */
-static int aurora_probe(void)
-{
- struct sbus_bus *sbus;
- struct sbus_dev *sdev;
- int grrr;
- char buf[30];
- int bn = 0;
- struct Aurora_board *bp;
-
- for_each_sbus(sbus) {
- for_each_sbusdev(sdev, sbus) {
-/* printk("Try: %x %s\n",sdev,sdev->prom_name);*/
- if (!strcmp(sdev->prom_name, "sio16")) {
-#ifdef AURORA_DEBUG
- printk(KERN_INFO "aurora: sio16 at %p\n",sdev);
-#endif
- if((sdev->reg_addrs[0].reg_size!=1) &&
- (sdev->reg_addrs[1].reg_size!=128) &&
- (sdev->reg_addrs[2].reg_size!=128) &&
- (sdev->reg_addrs[3].reg_size!=4)) {
- printk(KERN_ERR "aurora%d: registers' sizes "
- "do not match.\n", bn);
- break;
- }
- bp = &aurora_board[bn];
- bp->r0 = (struct aurora_reg1 *)
- sbus_ioremap(&sdev->resource[0], 0,
- sdev->reg_addrs[0].reg_size,
- "sio16");
- if (bp->r0 == NULL) {
- printk(KERN_ERR "aurora%d: can't map "
- "reg_addrs[0]\n", bn);
- break;
- }
-#ifdef AURORA_DEBUG
- printk("Map reg 0: %p\n", bp->r0);
-#endif
- bp->r[0] = (struct aurora_reg128 *)
- sbus_ioremap(&sdev->resource[1], 0,
- sdev->reg_addrs[1].reg_size,
- "sio16");
- if (bp->r[0] == NULL) {
- printk(KERN_ERR "aurora%d: can't map "
- "reg_addrs[1]\n", bn);
- break;
- }
-#ifdef AURORA_DEBUG
- printk("Map reg 1: %p\n", bp->r[0]);
-#endif
- bp->r[1] = (struct aurora_reg128 *)
- sbus_ioremap(&sdev->resource[2], 0,
- sdev->reg_addrs[2].reg_size,
- "sio16");
- if (bp->r[1] == NULL) {
- printk(KERN_ERR "aurora%d: can't map "
- "reg_addrs[2]\n", bn);
- break;
- }
-#ifdef AURORA_DEBUG
- printk("Map reg 2: %p\n", bp->r[1]);
-#endif
- bp->r3 = (struct aurora_reg4 *)
- sbus_ioremap(&sdev->resource[3], 0,
- sdev->reg_addrs[3].reg_size,
- "sio16");
- if (bp->r3 == NULL) {
- printk(KERN_ERR "aurora%d: can't map "
- "reg_addrs[3]\n", bn);
- break;
- }
-#ifdef AURORA_DEBUG
- printk("Map reg 3: %p\n", bp->r3);
-#endif
- /* Variables setup */
- bp->flags = 0;
-#ifdef AURORA_DEBUG
- grrr=prom_getint(sdev->prom_node,"intr");
- printk("intr pri %d\n", grrr);
-#endif
- if ((bp->irq=irqs[bn]) && valid_irq(bp->irq) &&
- !request_irq(bp->irq|0x30, aurora_interrupt, IRQF_SHARED, "sio16", bp)) {
- free_irq(bp->irq|0x30, bp);
- } else
- if ((bp->irq=prom_getint(sdev->prom_node, "bintr")) && valid_irq(bp->irq) &&
- !request_irq(bp->irq|0x30, aurora_interrupt, IRQF_SHARED, "sio16", bp)) {
- free_irq(bp->irq|0x30, bp);
- } else
- if ((bp->irq=prom_getint(sdev->prom_node, "intr")) && valid_irq(bp->irq) &&
- !request_irq(bp->irq|0x30, aurora_interrupt, IRQF_SHARED, "sio16", bp)) {
- free_irq(bp->irq|0x30, bp);
- } else
- for(grrr=0;grrr<TYPE_1_IRQS;grrr++) {
- if ((bp->irq=type_1_irq[grrr])&&!request_irq(bp->irq|0x30, aurora_interrupt, IRQF_SHARED, "sio16", bp)) {
- free_irq(bp->irq|0x30, bp);
- break;
- } else {
- printk(KERN_ERR "aurora%d: Could not get an irq for this board !!!\n",bn);
- bp->flags=0xff;
- }
- }
- if(bp->flags==0xff)break;
- printk(KERN_INFO "aurora%d: irq %d\n",bn,bp->irq&0x0f);
- buf[0]=0;
- grrr=prom_getproperty(sdev->prom_node,"dtr_rts",buf,sizeof(buf));
- if(!strcmp(buf,"swapped")){
- printk(KERN_INFO "aurora%d: Swapped DTR and RTS\n",bn);
- bp->DTR=MSVR_RTS;
- bp->RTS=MSVR_DTR;
- bp->MSVDTR=CD180_MSVRTS;
- bp->MSVRTS=CD180_MSVDTR;
- bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
- }else{
- #ifdef AURORA_FORCE_DTR_FLOW
- printk(KERN_INFO "aurora%d: Forcing swapped DTR-RTS\n",bn);
- bp->DTR=MSVR_RTS;
- bp->RTS=MSVR_DTR;
- bp->MSVDTR=CD180_MSVRTS;
- bp->MSVRTS=CD180_MSVDTR;
- bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
- #else
- printk(KERN_INFO "aurora%d: Normal DTR and RTS\n",bn);
- bp->DTR=MSVR_DTR;
- bp->RTS=MSVR_RTS;
- bp->MSVDTR=CD180_MSVDTR;
- bp->MSVRTS=CD180_MSVRTS;
- #endif
- }
- bp->oscfreq=prom_getint(sdev->prom_node,"clk")*100;
- printk(KERN_INFO "aurora%d: Oscillator: %d Hz\n",bn,bp->oscfreq);
- grrr=prom_getproperty(sdev->prom_node,"chip",buf,sizeof(buf));
- printk(KERN_INFO "aurora%d: Chips: %s\n",bn,buf);
- grrr=prom_getproperty(sdev->prom_node,"manu",buf,sizeof(buf));
- printk(KERN_INFO "aurora%d: Manufacturer: %s\n",bn,buf);
- grrr=prom_getproperty(sdev->prom_node,"model",buf,sizeof(buf));
- printk(KERN_INFO "aurora%d: Model: %s\n",bn,buf);
- grrr=prom_getproperty(sdev->prom_node,"rev",buf,sizeof(buf));
- printk(KERN_INFO "aurora%d: Revision: %s\n",bn,buf);
- grrr=prom_getproperty(sdev->prom_node,"mode",buf,sizeof(buf));
- printk(KERN_INFO "aurora%d: Mode: %s\n",bn,buf);
- #ifdef MODULE
- bp->count=0;
- #endif
- bp->flags = AURORA_BOARD_PRESENT;
- /* hardware ack */
- bp->ACK_MINT=1;
- bp->ACK_TINT=2;
- bp->ACK_RINT=3;
- bn++;
- }
- }
- }
- return bn;
-}
-
-static void aurora_release_io_range(struct Aurora_board *bp)
-{
- sbus_iounmap((unsigned long)bp->r0, 1);
- sbus_iounmap((unsigned long)bp->r[0], 128);
- sbus_iounmap((unsigned long)bp->r[1], 128);
- sbus_iounmap((unsigned long)bp->r3, 4);
-}
-
-static inline void aurora_mark_event(struct Aurora_port * port, int event)
-{
-#ifdef AURORA_DEBUG
- printk("aurora_mark_event: start\n");
-#endif
- set_bit(event, &port->event);
- queue_task(&port->tqueue, &tq_aurora);
- mark_bh(AURORA_BH);
-#ifdef AURORA_DEBUG
- printk("aurora_mark_event: end\n");
-#endif
-}
-
-static __inline__ struct Aurora_port * aurora_get_port(struct Aurora_board const * bp,
- int chip,
- unsigned char const *what)
-{
- unsigned char channel;
- struct Aurora_port * port;
-
- channel = ((chip << 3) |
- ((sbus_readb(&bp->r[chip]->r[CD180_GSCR]) & GSCR_CHAN) >> GSCR_CHAN_OFF));
- port = &aurora_port[board_No(bp) * AURORA_NPORT * AURORA_NCD180 + channel];
- if (port->flags & ASYNC_INITIALIZED)
- return port;
-
- printk(KERN_DEBUG "aurora%d: %s interrupt from invalid port %d\n",
- board_No(bp), what, channel);
- return NULL;
-}
-
-static void aurora_receive_exc(struct Aurora_board const * bp, int chip)
-{
- struct Aurora_port *port;
- struct tty_struct *tty;
- unsigned char status;
- unsigned char ch;
-
- if (!(port = aurora_get_port(bp, chip, "Receive_x")))
- return;
-
- tty = port->tty;
- if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
-#ifdef AURORA_INTNORM
- printk("aurora%d: port %d: Working around flip buffer overflow.\n",
- board_No(bp), port_No(port));
-#endif
- return;
- }
-
-#ifdef AURORA_REPORT_OVERRUN
- status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]);
- if (status & RCSR_OE) {
- port->overrun++;
-#if 1
- printk("aurora%d: port %d: Overrun. Total %ld overruns.\n",
- board_No(bp), port_No(port), port->overrun);
-#endif
- }
- status &= port->mark_mask;
-#else
- status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]) & port->mark_mask;
-#endif
- ch = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
- if (!status)
- return;
-
- if (status & RCSR_TOUT) {
-/* printk("aurora%d: port %d: Receiver timeout. Hardware problems ?\n",
- board_No(bp), port_No(port));*/
- return;
-
- } else if (status & RCSR_BREAK) {
- printk(KERN_DEBUG "aurora%d: port %d: Handling break...\n",
- board_No(bp), port_No(port));
- *tty->flip.flag_buf_ptr++ = TTY_BREAK;
- if (port->flags & ASYNC_SAK)
- do_SAK(tty);
-
- } else if (status & RCSR_PE)
- *tty->flip.flag_buf_ptr++ = TTY_PARITY;
-
- else if (status & RCSR_FE)
- *tty->flip.flag_buf_ptr++ = TTY_FRAME;
-
- else if (status & RCSR_OE)
- *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
-
- else
- *tty->flip.flag_buf_ptr++ = 0;
-
- *tty->flip.char_buf_ptr++ = ch;
- tty->flip.count++;
- queue_task(&tty->flip.tqueue, &tq_timer);
-}
-
-static void aurora_receive(struct Aurora_board const * bp, int chip)
-{
- struct Aurora_port *port;
- struct tty_struct *tty;
- unsigned char count,cnt;
-
- if (!(port = aurora_get_port(bp, chip, "Receive")))
- return;
-
- tty = port->tty;
-
- count = sbus_readb(&bp->r[chip]->r[CD180_RDCR]);
-
-#ifdef AURORA_REPORT_FIFO
- port->hits[count > 8 ? 9 : count]++;
-#endif
-
- while (count--) {
- if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
-#ifdef AURORA_INTNORM
- printk("aurora%d: port %d: Working around flip buffer overflow.\n",
- board_No(bp), port_No(port));
-#endif
- break;
- }
- cnt = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
- *tty->flip.char_buf_ptr++ = cnt;
- *tty->flip.flag_buf_ptr++ = 0;
- tty->flip.count++;
- }
- queue_task(&tty->flip.tqueue, &tq_timer);
-}
-
-static void aurora_transmit(struct Aurora_board const * bp, int chip)
-{
- struct Aurora_port *port;
- struct tty_struct *tty;
- unsigned char count;
-
- if (!(port = aurora_get_port(bp, chip, "Transmit")))
- return;
-
- tty = port->tty;
-
- if (port->SRER & SRER_TXEMPTY) {
- /* FIFO drained */
- sbus_writeb(port_No(port) & 7,
- &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
- port->SRER &= ~SRER_TXEMPTY;
- sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
- return;
- }
-
- if ((port->xmit_cnt <= 0 && !port->break_length)
- || tty->stopped || tty->hw_stopped) {
- sbus_writeb(port_No(port) & 7,
- &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
- port->SRER &= ~SRER_TXRDY;
- sbus_writeb(port->SRER,
- &bp->r[chip]->r[CD180_SRER]);
- return;
- }
-
- if (port->break_length) {
- if (port->break_length > 0) {
- if (port->COR2 & COR2_ETC) {
- sbus_writeb(CD180_C_ESC,
- &bp->r[chip]->r[CD180_TDR]);
- sbus_writeb(CD180_C_SBRK,
- &bp->r[chip]->r[CD180_TDR]);
- port->COR2 &= ~COR2_ETC;
- }
- count = min(port->break_length, 0xff);
- sbus_writeb(CD180_C_ESC,
- &bp->r[chip]->r[CD180_TDR]);
- sbus_writeb(CD180_C_DELAY,
- &bp->r[chip]->r[CD180_TDR]);
- sbus_writeb(count,
- &bp->r[chip]->r[CD180_TDR]);
- if (!(port->break_length -= count))
- port->break_length--;
- } else {
- sbus_writeb(CD180_C_ESC,
- &bp->r[chip]->r[CD180_TDR]);
- sbus_writeb(CD180_C_EBRK,
- &bp->r[chip]->r[CD180_TDR]);
- sbus_writeb(port->COR2,
- &bp->r[chip]->r[CD180_COR2]);
- aurora_wait_CCR(bp->r[chip]);
- sbus_writeb(CCR_CORCHG2,
- &bp->r[chip]->r[CD180_CCR]);
- port->break_length = 0;
- }
- return;
- }
-
- count = CD180_NFIFO;
- do {
- u8 byte = port->xmit_buf[port->xmit_tail++];
-
- sbus_writeb(byte, &bp->r[chip]->r[CD180_TDR]);
- port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1);
- if (--port->xmit_cnt <= 0)
- break;
- } while (--count > 0);
-
- if (port->xmit_cnt <= 0) {
- sbus_writeb(port_No(port) & 7,
- &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
- port->SRER &= ~SRER_TXRDY;
- sbus_writeb(port->SRER,
- &bp->r[chip]->r[CD180_SRER]);
- }
- if (port->xmit_cnt <= port->wakeup_chars)
- aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
-}
-
-static void aurora_check_modem(struct Aurora_board const * bp, int chip)
-{
- struct Aurora_port *port;
- struct tty_struct *tty;
- unsigned char mcr;
-
- if (!(port = aurora_get_port(bp, chip, "Modem")))
- return;
-
- tty = port->tty;
-
- mcr = sbus_readb(&bp->r[chip]->r[CD180_MCR]);
- if (mcr & MCR_CDCHG) {
- if (sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD)
- wake_up_interruptible(&port->open_wait);
- else
- schedule_task(&port->tqueue_hangup);
- }
-
-/* We don't have such things yet. My aurora board has DTR and RTS swapped, but that doesn't count in this driver. Let's hope
- * Aurora didn't made any boards with CTS or DSR broken...
- */
-/* #ifdef AURORA_BRAIN_DAMAGED_CTS
- if (mcr & MCR_CTSCHG) {
- if (aurora_in(bp, CD180_MSVR) & MSVR_CTS) {
- tty->hw_stopped = 0;
- port->SRER |= SRER_TXRDY;
- if (port->xmit_cnt <= port->wakeup_chars)
- aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
- } else {
- tty->hw_stopped = 1;
- port->SRER &= ~SRER_TXRDY;
- }
- sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
- }
- if (mcr & MCR_DSRCHG) {
- if (aurora_in(bp, CD180_MSVR) & MSVR_DSR) {
- tty->hw_stopped = 0;
- port->SRER |= SRER_TXRDY;
- if (port->xmit_cnt <= port->wakeup_chars)
- aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
- } else {
- tty->hw_stopped = 1;
- port->SRER &= ~SRER_TXRDY;
- }
- sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
- }
-#endif AURORA_BRAIN_DAMAGED_CTS */
-
- /* Clear change bits */
- sbus_writeb(0, &bp->r[chip]->r[CD180_MCR]);
-}
-
-/* The main interrupt processing routine */
-static irqreturn_t aurora_interrupt(int irq, void * dev_id)
-{
- unsigned char status;
- unsigned char ack,chip/*,chip_id*/;
- struct Aurora_board * bp = (struct Aurora_board *) dev_id;
- unsigned long loop = 0;
-
-#ifdef AURORA_INT_DEBUG
- printk("IRQ%d %d\n",irq,++irqhit);
-#ifdef AURORA_FLOODPRO
- if (irqhit>=AURORA_FLOODPRO)
- sbus_writeb(8, &bp->r0->r);
-#endif
-#endif
-
-/* old bp = IRQ_to_board[irq&0x0f];*/
-
- if (!bp || !(bp->flags & AURORA_BOARD_ACTIVE))
- return IRQ_NONE;
-
-/* The while() below takes care of this.
- status = sbus_readb(&bp->r[0]->r[CD180_SRSR]);
-#ifdef AURORA_INT_DEBUG
- printk("mumu: %02x\n", status);
-#endif
- if (!(status&SRSR_ANYINT))
- return IRQ_NONE; * Nobody has anything to say, so exit *
-*/
- while ((loop++ < 48) &&
- (status = sbus_readb(&bp->r[0]->r[CD180_SRSR]) & SRSR_ANYINT)){
-#ifdef AURORA_INT_DEBUG
- printk("SRSR: %02x\n", status);
-#endif
- if (status & SRSR_REXT) {
- ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
-#ifdef AURORA_INT_DEBUG
- printk("R-ACK %02x\n", ack);
-#endif
- if ((ack >> 5) == board_No(bp)) {
- if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
- if ((ack&GSVR_ITMASK)==GSVR_IT_RGD) {
- aurora_receive(bp,chip);
- sbus_writeb(0,
- &bp->r[chip]->r[CD180_EOSRR]);
- } else if ((ack & GSVR_ITMASK) == GSVR_IT_REXC) {
- aurora_receive_exc(bp,chip);
- sbus_writeb(0,
- &bp->r[chip]->r[CD180_EOSRR]);
- }
- }
- }
- } else if (status & SRSR_TEXT) {
- ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
-#ifdef AURORA_INT_DEBUG
- printk("T-ACK %02x\n", ack);
-#endif
- if ((ack >> 5) == board_No(bp)) {
- if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
- if ((ack&GSVR_ITMASK)==GSVR_IT_TX) {
- aurora_transmit(bp,chip);
- sbus_writeb(0,
- &bp->r[chip]->r[CD180_EOSRR]);
- }
- }
- }
- } else if (status & SRSR_MEXT) {
- ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
-#ifdef AURORA_INT_DEBUG
- printk("M-ACK %02x\n", ack);
-#endif
- if ((ack >> 5) == board_No(bp)) {
- if ((chip = ((ack>>3)&3)-1) < AURORA_NCD180) {
- if ((ack&GSVR_ITMASK)==GSVR_IT_MDM) {
- aurora_check_modem(bp,chip);
- sbus_writeb(0,
- &bp->r[chip]->r[CD180_EOSRR]);
- }
- }
- }
- }
- }
-/* I guess this faster code can be used with CD1865, using AUROPRI and GLOBPRI. */
-#if 0
- while ((loop++ < 48)&&(status=bp->r[0]->r[CD180_SRSR]&SRSR_ANYINT)){
-#ifdef AURORA_INT_DEBUG
- printk("SRSR: %02x\n",status);
-#endif
- ack = sbus_readb(&bp->r3->r[0]);
-#ifdef AURORA_INT_DEBUG
- printk("ACK: %02x\n",ack);
-#endif
- if ((ack>>5)==board_No(bp)) {
- if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
- ack&=GSVR_ITMASK;
- if (ack==GSVR_IT_RGD) {
- aurora_receive(bp,chip);
- sbus_writeb(0,
- &bp->r[chip]->r[CD180_EOSRR]);
- } else if (ack==GSVR_IT_REXC) {
- aurora_receive_exc(bp,chip);
- sbus_writeb(0,
- &bp->r[chip]->r[CD180_EOSRR]);
- } else if (ack==GSVR_IT_TX) {
- aurora_transmit(bp,chip);
- sbus_writeb(0,
- &bp->r[chip]->r[CD180_EOSRR]);
- } else if (ack==GSVR_IT_MDM) {
- aurora_check_modem(bp,chip);
- sbus_writeb(0,
- &bp->r[chip]->r[CD180_EOSRR]);
- }
- }
- }
- }
-#endif
-
-/* This is the old handling routine, used in riscom8 for only one CD180. I keep it here for reference. */
-#if 0
- for(chip=0;chip<AURORA_NCD180;chip++){
- chip_id=(board_No(bp)<<5)|((chip+1)<<3);
- loop=0;
- while ((loop++ < 1) &&
- ((status = sbus_readb(&bp->r[chip]->r[CD180_SRSR])) &
- (SRSR_TEXT | SRSR_MEXT | SRSR_REXT))) {
-
- if (status & SRSR_REXT) {
- ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
- if (ack == (chip_id | GSVR_IT_RGD)) {
-#ifdef AURORA_INTMSG
- printk("RX ACK\n");
-#endif
- aurora_receive(bp,chip);
- } else if (ack == (chip_id | GSVR_IT_REXC)) {
-#ifdef AURORA_INTMSG
- printk("RXC ACK\n");
-#endif
- aurora_receive_exc(bp,chip);
- } else {
-#ifdef AURORA_INTNORM
- printk("aurora%d-%d: Bad receive ack 0x%02x.\n",
- board_No(bp), chip, ack);
-#endif
- }
- } else if (status & SRSR_TEXT) {
- ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
- if (ack == (chip_id | GSVR_IT_TX)){
-#ifdef AURORA_INTMSG
- printk("TX ACK\n");
-#endif
- aurora_transmit(bp,chip);
- } else {
-#ifdef AURORA_INTNORM
- printk("aurora%d-%d: Bad transmit ack 0x%02x.\n",
- board_No(bp), chip, ack);
-#endif
- }
- } else if (status & SRSR_MEXT) {
- ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
- if (ack == (chip_id | GSVR_IT_MDM)){
-#ifdef AURORA_INTMSG
- printk("MDM ACK\n");
-#endif
- aurora_check_modem(bp,chip);
- } else {
-#ifdef AURORA_INTNORM
- printk("aurora%d-%d: Bad modem ack 0x%02x.\n",
- board_No(bp), chip, ack);
-#endif
- }
- }
- sbus_writeb(0, &bp->r[chip]->r[CD180_EOSRR]);
- }
- }
-#endif
-
- return IRQ_HANDLED;
-}
-
-#ifdef AURORA_INT_DEBUG
-static void aurora_timer (unsigned long ignored);
-
-static DEFINE_TIMER(aurora_poll_timer, aurora_timer, 0, 0);
-
-static void
-aurora_timer (unsigned long ignored)
-{
- unsigned long flags;
- int i;
-
- save_flags(flags); cli();
-
- printk("SRSR: %02x,%02x - ",
- sbus_readb(&aurora_board[0].r[0]->r[CD180_SRSR]),
- sbus_readb(&aurora_board[0].r[1]->r[CD180_SRSR]));
- for (i = 0; i < 4; i++) {
- udelay(1);
- printk("%02x ",
- sbus_readb(&aurora_board[0].r3->r[i]));
- }
- printk("\n");
-
- aurora_poll_timer.expires = jiffies + 300;
- add_timer (&aurora_poll_timer);
-
- restore_flags(flags);
-}
-#endif
-
-/*
- * Routines for open & close processing.
- */
-
-/* Called with disabled interrupts */
-static int aurora_setup_board(struct Aurora_board * bp)
-{
- int error;
-
-#ifdef AURORA_ALLIRQ
- int i;
- for (i = 0; i < AURORA_ALLIRQ; i++) {
- error = request_irq(allirq[i]|0x30, aurora_interrupt, IRQF_SHARED,
- "sio16", bp);
- if (error)
- printk(KERN_ERR "IRQ%d request error %d\n",
- allirq[i], error);
- }
-#else
- error = request_irq(bp->irq|0x30, aurora_interrupt, IRQF_SHARED,
- "sio16", bp);
- if (error) {
- printk(KERN_ERR "IRQ request error %d\n", error);
- return error;
- }
-#endif
- /* Board reset */
- sbus_writeb(0, &bp->r0->r);
- udelay(1);
- if (bp->flags & AURORA_BOARD_TYPE_2) {
- /* unknown yet */
- } else {
- sbus_writeb((AURORA_CFG_ENABLE_IO | AURORA_CFG_ENABLE_IRQ |
- (((bp->irq)&0x0f)>>2)),
- &bp->r0->r);
- }
- udelay(10000);
-
- if (aurora_init_CD180(bp,0))error=1;error=0;
- if (aurora_init_CD180(bp,1))error++;
- if (error == AURORA_NCD180) {
- printk(KERN_ERR "Both chips failed initialisation.\n");
- return -EIO;
- }
-
-#ifdef AURORA_INT_DEBUG
- aurora_poll_timer.expires= jiffies + 1;
- add_timer(&aurora_poll_timer);
-#endif
-#ifdef AURORA_DEBUG
- printk("aurora_setup_board: end\n");
-#endif
- return 0;
-}
-
-/* Called with disabled interrupts */
-static void aurora_shutdown_board(struct Aurora_board *bp)
-{
- int i;
-
-#ifdef AURORA_DEBUG
- printk("aurora_shutdown_board: start\n");
-#endif
-
-#ifdef AURORA_INT_DEBUG
- del_timer(&aurora_poll_timer);
-#endif
-
-#ifdef AURORA_ALLIRQ
- for(i=0;i<AURORA_ALLIRQ;i++){
- free_irq(allirq[i]|0x30, bp);
-/* IRQ_to_board[allirq[i]&0xf] = NULL;*/
- }
-#else
- free_irq(bp->irq|0x30, bp);
-/* IRQ_to_board[bp->irq&0xf] = NULL;*/
-#endif
- /* Drop all DTR's */
- for(i=0;i<16;i++){
- sbus_writeb(i & 7, &bp->r[i>>3]->r[CD180_CAR]);
- udelay(1);
- sbus_writeb(0, &bp->r[i>>3]->r[CD180_MSVR]);
- udelay(1);
- }
- /* Board shutdown */
- sbus_writeb(0, &bp->r0->r);
-
-#ifdef AURORA_DEBUG
- printk("aurora_shutdown_board: end\n");
-#endif
-}
-
-/* Setting up port characteristics.
- * Must be called with disabled interrupts
- */
-static void aurora_change_speed(struct Aurora_board *bp, struct Aurora_port *port)
-{
- struct tty_struct *tty;
- unsigned long baud;
- long tmp;
- unsigned char cor1 = 0, cor3 = 0;
- unsigned char mcor1 = 0, mcor2 = 0,chip;
-
-#ifdef AURORA_DEBUG
- printk("aurora_change_speed: start\n");
-#endif
- if (!(tty = port->tty) || !tty->termios)
- return;
-
- chip = AURORA_CD180(port_No(port));
-
- port->SRER = 0;
- port->COR2 = 0;
- port->MSVR = MSVR_RTS|MSVR_DTR;
-
- baud = tty_get_baud_rate(tty);
-
- /* Select port on the board */
- sbus_writeb(port_No(port) & 7,
- &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
-
- if (!baud) {
- /* Drop DTR & exit */
- port->MSVR &= ~(bp->DTR|bp->RTS);
- sbus_writeb(port->MSVR,
- &bp->r[chip]->r[CD180_MSVR]);
- return;
- } else {
- /* Set DTR on */
- port->MSVR |= bp->DTR;
- sbus_writeb(port->MSVR,
- &bp->r[chip]->r[CD180_MSVR]);
- }
-
- /* Now we must calculate some speed dependent things. */
-
- /* Set baud rate for port. */
- tmp = (((bp->oscfreq + baud/2) / baud +
- CD180_TPC/2) / CD180_TPC);
-
-/* tmp = (bp->oscfreq/7)/baud;
- if((tmp%10)>4)tmp=tmp/10+1;else tmp=tmp/10;*/
-/* printk("Prescaler period: %d\n",tmp);*/
-
- sbus_writeb((tmp >> 8) & 0xff,
- &bp->r[chip]->r[CD180_RBPRH]);
- sbus_writeb((tmp >> 8) & 0xff,
- &bp->r[chip]->r[CD180_TBPRH]);
- sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_RBPRL]);
- sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_TBPRL]);
-
- 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;
- 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 = (AURORA_TPS + AURORA_TPS/2 + baud/2) / baud;
- tmp = (tmp > 0xff) ? 0xff : tmp;
- sbus_writeb(tmp, &bp->r[chip]->r[CD180_RTPR]);
-
- switch (C_CSIZE(tty)) {
- case CS5:
- cor1 |= COR1_5BITS;
- break;
- case CS6:
- cor1 |= COR1_6BITS;
- break;
- case CS7:
- cor1 |= COR1_7BITS;
- break;
- case CS8:
- cor1 |= COR1_8BITS;
- break;
- }
-
- if (C_CSTOPB(tty))
- cor1 |= COR1_2SB;
-
- cor1 |= COR1_IGNORE;
- if (C_PARENB(tty)) {
- cor1 |= COR1_NORMPAR;
- if (C_PARODD(tty))
- cor1 |= COR1_ODDP;
- if (I_INPCK(tty))
- cor1 &= ~COR1_IGNORE;
- }
- /* Set marking of some errors */
- port->mark_mask = RCSR_OE | RCSR_TOUT;
- if (I_INPCK(tty))
- port->mark_mask |= RCSR_FE | RCSR_PE;
- if (I_BRKINT(tty) || I_PARMRK(tty))
- port->mark_mask |= RCSR_BREAK;
- if (I_IGNPAR(tty))
- port->mark_mask &= ~(RCSR_FE | RCSR_PE);
- if (I_IGNBRK(tty)) {
- port->mark_mask &= ~RCSR_BREAK;
- if (I_IGNPAR(tty))
- /* Real raw mode. Ignore all */
- port->mark_mask &= ~RCSR_OE;
- }
- /* Enable Hardware Flow Control */
- if (C_CRTSCTS(tty)) {
-/*#ifdef AURORA_BRAIN_DAMAGED_CTS
- port->SRER |= SRER_DSR | SRER_CTS;
- mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD;
- mcor2 |= MCOR2_DSROD | MCOR2_CTSOD;
- tty->hw_stopped = !(aurora_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR));
-#else*/
- port->COR2 |= COR2_CTSAE;
-/*#endif*/
- if (bp->flags&AURORA_BOARD_DTR_FLOW_OK) {
- mcor1 |= AURORA_RXTH;
- }
- }
- /* Enable Software Flow Control. FIXME: I'm not sure about this */
- /* Some people reported that it works, but I still doubt */
- if (I_IXON(tty)) {
- port->COR2 |= COR2_TXIBE;
- cor3 |= (COR3_FCT | COR3_SCDE);
- if (I_IXANY(tty))
- port->COR2 |= COR2_IXM;
- sbus_writeb(START_CHAR(tty),
- &bp->r[chip]->r[CD180_SCHR1]);
- sbus_writeb(STOP_CHAR(tty),
- &bp->r[chip]->r[CD180_SCHR2]);
- sbus_writeb(START_CHAR(tty),
- &bp->r[chip]->r[CD180_SCHR3]);
- sbus_writeb(STOP_CHAR(tty),
- &bp->r[chip]->r[CD180_SCHR4]);
- }
- if (!C_CLOCAL(tty)) {
- /* Enable CD check */
- port->SRER |= SRER_CD;
- mcor1 |= MCOR1_CDZD;
- mcor2 |= MCOR2_CDOD;
- }
-
- if (C_CREAD(tty))
- /* Enable receiver */
- port->SRER |= SRER_RXD;
-
- /* Set input FIFO size (1-8 bytes) */
- cor3 |= AURORA_RXFIFO;
- /* Setting up CD180 channel registers */
- sbus_writeb(cor1, &bp->r[chip]->r[CD180_COR1]);
- sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
- sbus_writeb(cor3, &bp->r[chip]->r[CD180_COR3]);
- /* Make CD180 know about registers change */
- aurora_wait_CCR(bp->r[chip]);
- sbus_writeb(CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3,
- &bp->r[chip]->r[CD180_CCR]);
- /* Setting up modem option registers */
- sbus_writeb(mcor1, &bp->r[chip]->r[CD180_MCOR1]);
- sbus_writeb(mcor2, &bp->r[chip]->r[CD180_MCOR2]);
- /* Enable CD180 transmitter & receiver */
- aurora_wait_CCR(bp->r[chip]);
- sbus_writeb(CCR_TXEN | CCR_RXEN, &bp->r[chip]->r[CD180_CCR]);
- /* Enable interrupts */
- sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
- /* And finally set RTS on */
- sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
-#ifdef AURORA_DEBUG
- printk("aurora_change_speed: end\n");
-#endif
-}
-
-/* Must be called with interrupts enabled */
-static int aurora_setup_port(struct Aurora_board *bp, struct Aurora_port *port)
-{
- unsigned long flags;
-
-#ifdef AURORA_DEBUG
- printk("aurora_setup_port: start %d\n",port_No(port));
-#endif
- 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)))
- return -ENOMEM;
-
- if (port->xmit_buf) {
- free_page(tmp);
- return -ERESTARTSYS;
- }
- port->xmit_buf = (unsigned char *) tmp;
- }
-
- save_flags(flags); cli();
-
- if (port->tty)
- clear_bit(TTY_IO_ERROR, &port->tty->flags);
-
-#ifdef MODULE
- if ((port->count == 1) && ((++bp->count) == 1))
- bp->flags |= AURORA_BOARD_ACTIVE;
-#endif
-
- port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
- aurora_change_speed(bp, port);
- port->flags |= ASYNC_INITIALIZED;
-
- restore_flags(flags);
-#ifdef AURORA_DEBUG
- printk("aurora_setup_port: end\n");
-#endif
- return 0;
-}
-
-/* Must be called with interrupts disabled */
-static void aurora_shutdown_port(struct Aurora_board *bp, struct Aurora_port *port)
-{
- struct tty_struct *tty;
- unsigned char chip;
-
-#ifdef AURORA_DEBUG
- printk("aurora_shutdown_port: start\n");
-#endif
- if (!(port->flags & ASYNC_INITIALIZED))
- return;
-
- chip = AURORA_CD180(port_No(port));
-
-#ifdef AURORA_REPORT_OVERRUN
- printk("aurora%d: port %d: Total %ld overruns were detected.\n",
- board_No(bp), port_No(port), port->overrun);
-#endif
-#ifdef AURORA_REPORT_FIFO
- {
- int i;
-
- printk("aurora%d: port %d: FIFO hits [ ",
- board_No(bp), port_No(port));
- for (i = 0; i < 10; i++) {
- printk("%ld ", port->hits[i]);
- }
- printk("].\n");
- }
-#endif
- if (port->xmit_buf) {
- free_page((unsigned long) port->xmit_buf);
- port->xmit_buf = NULL;
- }
-
- if (!(tty = port->tty) || C_HUPCL(tty)) {
- /* Drop DTR */
- port->MSVR &= ~(bp->DTR|bp->RTS);
- sbus_writeb(port->MSVR,
- &bp->r[chip]->r[CD180_MSVR]);
- }
-
- /* Select port */
- sbus_writeb(port_No(port) & 7,
- &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
-
- /* Reset port */
- aurora_wait_CCR(bp->r[chip]);
- sbus_writeb(CCR_SOFTRESET, &bp->r[chip]->r[CD180_CCR]);
-
- /* Disable all interrupts from this port */
- port->SRER = 0;
- sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
-
- if (tty)
- set_bit(TTY_IO_ERROR, &tty->flags);
- port->flags &= ~ASYNC_INITIALIZED;
-
-#ifdef MODULE
- if (--bp->count < 0) {
- printk(KERN_DEBUG "aurora%d: aurora_shutdown_port: "
- "bad board count: %d\n",
- board_No(bp), bp->count);
- bp->count = 0;
- }
-
- if (!bp->count)
- bp->flags &= ~AURORA_BOARD_ACTIVE;
-#endif
-
-#ifdef AURORA_DEBUG
- printk("aurora_shutdown_port: end\n");
-#endif
-}
-
-
-static int block_til_ready(struct tty_struct *tty, struct file * filp,
- struct Aurora_port *port)
-{
- DECLARE_WAITQUEUE(wait, current);
- struct Aurora_board *bp = port_Board(port);
- int retval;
- int do_clocal = 0;
- int CD;
- unsigned char chip;
-
-#ifdef AURORA_DEBUG
- printk("block_til_ready: start\n");
-#endif
- chip = AURORA_CD180(port_No(port));
-
- /* 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) || port->flags & ASYNC_CLOSING) {
- interruptible_sleep_on(&port->close_wait);
- if (port->flags & ASYNC_HUP_NOTIFY)
- return -EAGAIN;
- else
- return -ERESTARTSYS;
- }
-
- /* 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))) {
- port->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
- }
-
- if (C_CLOCAL(tty))
- 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, info->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(&port->open_wait, &wait);
- cli();
- if (!tty_hung_up_p(filp))
- port->count--;
- sti();
- port->blocked_open++;
- while (1) {
- cli();
- sbus_writeb(port_No(port) & 7,
- &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
- CD = sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD;
- port->MSVR=bp->RTS;
-
- /* auto drops DTR */
- sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
- sti();
- set_current_state(TASK_INTERRUPTIBLE);
- if (tty_hung_up_p(filp) ||
- !(port->flags & ASYNC_INITIALIZED)) {
- if (port->flags & ASYNC_HUP_NOTIFY)
- retval = -EAGAIN;
- else
- retval = -ERESTARTSYS;
- break;
- }
- if (!(port->flags & ASYNC_CLOSING) &&
- (do_clocal || CD))
- break;
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
- schedule();
- }
- current->state = TASK_RUNNING;
- remove_wait_queue(&port->open_wait, &wait);
- if (!tty_hung_up_p(filp))
- port->count++;
- port->blocked_open--;
- if (retval)
- return retval;
-
- port->flags |= ASYNC_NORMAL_ACTIVE;
-#ifdef AURORA_DEBUG
- printk("block_til_ready: end\n");
-#endif
- return 0;
-}
-
-static int aurora_open(struct tty_struct * tty, struct file * filp)
-{
- int board;
- int error;
- struct Aurora_port * port;
- struct Aurora_board * bp;
- unsigned long flags;
-
-#ifdef AURORA_DEBUG
- printk("aurora_open: start\n");
-#endif
-
- board = AURORA_BOARD(tty->index);
- if (board > AURORA_NBOARD ||
- !(aurora_board[board].flags & AURORA_BOARD_PRESENT)) {
-#ifdef AURORA_DEBUG
- printk("aurora_open: error board %d present %d\n",
- board, aurora_board[board].flags & AURORA_BOARD_PRESENT);
-#endif
- return -ENODEV;
- }
-
- bp = &aurora_board[board];
- port = aurora_port + board * AURORA_NPORT * AURORA_NCD180 + AURORA_PORT(tty->index);
- if ((aurora_paranoia_check(port, tty->name, "aurora_open")) {
-#ifdef AURORA_DEBUG
- printk("aurora_open: error paranoia check\n");
-#endif
- return -ENODEV;
- }
-
- port->count++;
- tty->driver_data = port;
- port->tty = tty;
-
- if ((error = aurora_setup_port(bp, port))) {
-#ifdef AURORA_DEBUG
- printk("aurora_open: error aurora_setup_port ret %d\n",error);
-#endif
- return error;
- }
-
- if ((error = block_til_ready(tty, filp, port))) {
-#ifdef AURORA_DEBUG
- printk("aurora_open: error block_til_ready ret %d\n",error);
-#endif
- return error;
- }
-
-#ifdef AURORA_DEBUG
- printk("aurora_open: end\n");
-#endif
- return 0;
-}
-
-static void aurora_close(struct tty_struct * tty, struct file * filp)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- struct Aurora_board *bp;
- unsigned long flags;
- unsigned long timeout;
- unsigned char chip;
-
-#ifdef AURORA_DEBUG
- printk("aurora_close: start\n");
-#endif
-
- if (!port || (aurora_paranoia_check(port, tty->name, "close"))
- return;
-
- chip = AURORA_CD180(port_No(port));
-
- save_flags(flags); cli();
- if (tty_hung_up_p(filp)) {
- restore_flags(flags);
- return;
- }
-
- bp = port_Board(port);
- if ((tty->count == 1) && (port->count != 1)) {
- printk(KERN_DEBUG "aurora%d: aurora_close: bad port count; "
- "tty->count is 1, port count is %d\n",
- board_No(bp), port->count);
- port->count = 1;
- }
- if (--port->count < 0) {
- printk(KERN_DEBUG "aurora%d: aurora_close: bad port "
- "count for tty%d: %d\n",
- board_No(bp), port_No(port), port->count);
- port->count = 0;
- }
- if (port->count) {
- restore_flags(flags);
- return;
- }
- port->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 (port->closing_wait != ASYNC_CLOSING_WAIT_NONE){
-#ifdef AURORA_DEBUG
- printk("aurora_close: waiting to flush...\n");
-#endif
- tty_wait_until_sent(tty, port->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.
- */
- port->SRER &= ~SRER_RXD;
- if (port->flags & ASYNC_INITIALIZED) {
- port->SRER &= ~SRER_TXRDY;
- port->SRER |= SRER_TXEMPTY;
- sbus_writeb(port_No(port) & 7,
- &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
- sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
- /*
- * 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(port->SRER & SRER_TXEMPTY) {
- msleep_interruptible(jiffies_to_msecs(port->timeout));
- if (time_after(jiffies, timeout))
- break;
- }
- }
-#ifdef AURORA_DEBUG
- printk("aurora_close: shutdown_port\n");
-#endif
- aurora_shutdown_port(bp, port);
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
- tty_ldisc_flush(tty);
- tty->closing = 0;
- port->event = 0;
- port->tty = 0;
- if (port->blocked_open) {
- 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);
- wake_up_interruptible(&port->close_wait);
- restore_flags(flags);
-#ifdef AURORA_DEBUG
- printk("aurora_close: end\n");
-#endif
-}
-
-static int aurora_write(struct tty_struct * tty,
- const unsigned char *buf, int count)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- struct Aurora_board *bp;
- int c, total = 0;
- unsigned long flags;
- unsigned char chip;
-
-#ifdef AURORA_DEBUG
- printk("aurora_write: start %d\n",count);
-#endif
- if ((aurora_paranoia_check(port, tty->name, "aurora_write"))
- return 0;
-
- chip = AURORA_CD180(port_No(port));
-
- bp = port_Board(port);
-
- if (!tty || !port->xmit_buf || !tmp_buf)
- return 0;
-
- save_flags(flags);
- while (1) {
- cli();
- c = min(count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
- SERIAL_XMIT_SIZE - port->xmit_head));
- if (c <= 0) {
- restore_flags(flags);
- break;
- }
- memcpy(port->xmit_buf + port->xmit_head, buf, c);
- port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
- port->xmit_cnt += c;
- restore_flags(flags);
-
- buf += c;
- count -= c;
- total += c;
- }
-
- cli();
- if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
- !(port->SRER & SRER_TXRDY)) {
- port->SRER |= SRER_TXRDY;
- sbus_writeb(port_No(port) & 7,
- &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
- sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
- }
- restore_flags(flags);
-#ifdef AURORA_DEBUG
- printk("aurora_write: end %d\n",total);
-#endif
- return total;
-}
-
-static void aurora_put_char(struct tty_struct * tty, unsigned char ch)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- unsigned long flags;
-
-#ifdef AURORA_DEBUG
- printk("aurora_put_char: start %c\n",ch);
-#endif
- if ((aurora_paranoia_check(port, tty->name, "aurora_put_char"))
- return;
-
- if (!tty || !port->xmit_buf)
- return;
-
- save_flags(flags); cli();
-
- if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
- restore_flags(flags);
- return;
- }
-
- port->xmit_buf[port->xmit_head++] = ch;
- port->xmit_head &= SERIAL_XMIT_SIZE - 1;
- port->xmit_cnt++;
- restore_flags(flags);
-#ifdef AURORA_DEBUG
- printk("aurora_put_char: end\n");
-#endif
-}
-
-static void aurora_flush_chars(struct tty_struct * tty)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- unsigned long flags;
- unsigned char chip;
-
-/*#ifdef AURORA_DEBUG
- printk("aurora_flush_chars: start\n");
-#endif*/
- if ((aurora_paranoia_check(port, tty->name, "aurora_flush_chars"))
- return;
-
- chip = AURORA_CD180(port_No(port));
-
- if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
- !port->xmit_buf)
- return;
-
- save_flags(flags); cli();
- port->SRER |= SRER_TXRDY;
- sbus_writeb(port_No(port) & 7,
- &port_Board(port)->r[chip]->r[CD180_CAR]);
- udelay(1);
- sbus_writeb(port->SRER,
- &port_Board(port)->r[chip]->r[CD180_SRER]);
- restore_flags(flags);
-/*#ifdef AURORA_DEBUG
- printk("aurora_flush_chars: end\n");
-#endif*/
-}
-
-static int aurora_write_room(struct tty_struct * tty)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- int ret;
-
-#ifdef AURORA_DEBUG
- printk("aurora_write_room: start\n");
-#endif
- if ((aurora_paranoia_check(port, tty->name, "aurora_write_room"))
- return 0;
-
- ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
- if (ret < 0)
- ret = 0;
-#ifdef AURORA_DEBUG
- printk("aurora_write_room: end\n");
-#endif
- return ret;
-}
-
-static int aurora_chars_in_buffer(struct tty_struct *tty)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
-
- if ((aurora_paranoia_check(port, tty->name, "aurora_chars_in_buffer"))
- return 0;
-
- return port->xmit_cnt;
-}
-
-static void aurora_flush_buffer(struct tty_struct *tty)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- unsigned long flags;
-
-#ifdef AURORA_DEBUG
- printk("aurora_flush_buffer: start\n");
-#endif
- if ((aurora_paranoia_check(port, tty->name, "aurora_flush_buffer"))
- return;
-
- save_flags(flags); cli();
- port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
- restore_flags(flags);
-
- tty_wakeup(tty);
-#ifdef AURORA_DEBUG
- printk("aurora_flush_buffer: end\n");
-#endif
-}
-
-static int aurora_tiocmget(struct tty_struct *tty, struct file *file)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- struct Aurora_board * bp;
- unsigned char status,chip;
- unsigned int result;
- unsigned long flags;
-
-#ifdef AURORA_DEBUG
- printk("aurora_get_modem_info: start\n");
-#endif
- if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
- return -ENODEV;
-
- chip = AURORA_CD180(port_No(port));
-
- bp = port_Board(port);
-
- save_flags(flags); cli();
-
- sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
-
- status = sbus_readb(&bp->r[chip]->r[CD180_MSVR]);
- result = 0/*bp->r[chip]->r[AURORA_RI] & (1u << port_No(port)) ? 0 : TIOCM_RNG*/;
-
- restore_flags(flags);
-
- result |= ((status & bp->RTS) ? TIOCM_RTS : 0)
- | ((status & bp->DTR) ? TIOCM_DTR : 0)
- | ((status & MSVR_CD) ? TIOCM_CAR : 0)
- | ((status & MSVR_DSR) ? TIOCM_DSR : 0)
- | ((status & MSVR_CTS) ? TIOCM_CTS : 0);
-
-#ifdef AURORA_DEBUG
- printk("aurora_get_modem_info: end\n");
-#endif
- return result;
-}
-
-static int aurora_tiocmset(struct tty_struct *tty, struct file *file,
- unsigned int set, unsigned int clear)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- unsigned int arg;
- unsigned long flags;
- struct Aurora_board *bp = port_Board(port);
- unsigned char chip;
-
-#ifdef AURORA_DEBUG
- printk("aurora_set_modem_info: start\n");
-#endif
- if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
- return -ENODEV;
-
- chip = AURORA_CD180(port_No(port));
-
- save_flags(flags); cli();
- if (set & TIOCM_RTS)
- port->MSVR |= bp->RTS;
- if (set & TIOCM_DTR)
- port->MSVR |= bp->DTR;
- if (clear & TIOCM_RTS)
- port->MSVR &= ~bp->RTS;
- if (clear & TIOCM_DTR)
- port->MSVR &= ~bp->DTR;
-
- sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
-
- sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
-
- restore_flags(flags);
-#ifdef AURORA_DEBUG
- printk("aurora_set_modem_info: end\n");
-#endif
- return 0;
-}
-
-static void aurora_send_break(struct Aurora_port * port, unsigned long length)
-{
- struct Aurora_board *bp = port_Board(port);
- unsigned long flags;
- unsigned char chip;
-
-#ifdef AURORA_DEBUG
- printk("aurora_send_break: start\n");
-#endif
- chip = AURORA_CD180(port_No(port));
-
- save_flags(flags); cli();
-
- port->break_length = AURORA_TPS / HZ * length;
- port->COR2 |= COR2_ETC;
- port->SRER |= SRER_TXRDY;
- sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
-
- sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
- sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
- aurora_wait_CCR(bp->r[chip]);
-
- sbus_writeb(CCR_CORCHG2, &bp->r[chip]->r[CD180_CCR]);
- aurora_wait_CCR(bp->r[chip]);
-
- restore_flags(flags);
-#ifdef AURORA_DEBUG
- printk("aurora_send_break: end\n");
-#endif
-}
-
-static int aurora_set_serial_info(struct Aurora_port * port,
- struct serial_struct * newinfo)
-{
- struct serial_struct tmp;
- struct Aurora_board *bp = port_Board(port);
- int change_speed;
- unsigned long flags;
-
-#ifdef AURORA_DEBUG
- printk("aurora_set_serial_info: start\n");
-#endif
- if (copy_from_user(&tmp, newinfo, sizeof(tmp)))
- return -EFAULT;
-#if 0
- if ((tmp.irq != bp->irq) ||
- (tmp.port != bp->base) ||
- (tmp.type != PORT_CIRRUS) ||
- (tmp.baud_base != (bp->oscfreq + CD180_TPC/2) / CD180_TPC) ||
- (tmp.custom_divisor != 0) ||
- (tmp.xmit_fifo_size != CD180_NFIFO) ||
- (tmp.flags & ~AURORA_LEGAL_FLAGS))
- return -EINVAL;
-#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)))
- return -EPERM;
- port->flags = ((port->flags & ~ASYNC_USR_MASK) |
- (tmp.flags & ASYNC_USR_MASK));
- } else {
- port->flags = ((port->flags & ~ASYNC_FLAGS) |
- (tmp.flags & ASYNC_FLAGS));
- port->close_delay = tmp.close_delay;
- port->closing_wait = tmp.closing_wait;
- }
- if (change_speed) {
- save_flags(flags); cli();
- aurora_change_speed(bp, port);
- restore_flags(flags);
- }
-#ifdef AURORA_DEBUG
- printk("aurora_set_serial_info: end\n");
-#endif
- return 0;
-}
-
-extern int aurora_get_serial_info(struct Aurora_port * port,
- struct serial_struct * retinfo)
-{
- struct serial_struct tmp;
- struct Aurora_board *bp = port_Board(port);
-
-#ifdef AURORA_DEBUG
- printk("aurora_get_serial_info: start\n");
-#endif
- if (!access_ok(VERIFY_WRITE, (void *) retinfo, sizeof(tmp)))
- return -EFAULT;
-
- memset(&tmp, 0, sizeof(tmp));
- tmp.type = PORT_CIRRUS;
- tmp.line = port - aurora_port;
- tmp.port = 0;
- tmp.irq = bp->irq;
- tmp.flags = port->flags;
- tmp.baud_base = (bp->oscfreq + CD180_TPC/2) / CD180_TPC;
- tmp.close_delay = port->close_delay * HZ/100;
- tmp.closing_wait = port->closing_wait * HZ/100;
- tmp.xmit_fifo_size = CD180_NFIFO;
- copy_to_user(retinfo, &tmp, sizeof(tmp));
-#ifdef AURORA_DEBUG
-printk("aurora_get_serial_info: end\n");
-#endif
- return 0;
-}
-
-static int aurora_ioctl(struct tty_struct * tty, struct file * filp,
- unsigned int cmd, unsigned long arg)
-
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- int retval;
-
-#ifdef AURORA_DEBUG
- printk("aurora_ioctl: start\n");
-#endif
- if ((aurora_paranoia_check(port, tty->name, "aurora_ioctl"))
- return -ENODEV;
-
- switch (cmd) {
- case TCSBRK: /* SVID version: non-zero arg --> no break */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- if (!arg)
- aurora_send_break(port, HZ/4); /* 1/4 second */
- return 0;
- case TCSBRKP: /* support for POSIX tcsendbreak() */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- aurora_send_break(port, arg ? arg*(HZ/10) : HZ/4);
- return 0;
- case TIOCGSOFTCAR:
- return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *)arg);
- case TIOCSSOFTCAR:
- if (get_user(arg,(unsigned long *)arg))
- return -EFAULT;
- tty->termios->c_cflag =
- ((tty->termios->c_cflag & ~CLOCAL) |
- (arg ? CLOCAL : 0));
- return 0;
- case TIOCGSERIAL:
- return aurora_get_serial_info(port, (struct serial_struct *) arg);
- case TIOCSSERIAL:
- return aurora_set_serial_info(port, (struct serial_struct *) arg);
- default:
- return -ENOIOCTLCMD;
- };
-#ifdef AURORA_DEBUG
- printk("aurora_ioctl: end\n");
-#endif
- return 0;
-}
-
-static void aurora_throttle(struct tty_struct * tty)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- struct Aurora_board *bp;
- unsigned long flags;
- unsigned char chip;
-
-#ifdef AURORA_DEBUG
- printk("aurora_throttle: start\n");
-#endif
- if ((aurora_paranoia_check(port, tty->name, "aurora_throttle"))
- return;
-
- bp = port_Board(port);
- chip = AURORA_CD180(port_No(port));
-
- save_flags(flags); cli();
- port->MSVR &= ~bp->RTS;
- sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
- if (I_IXOFF(tty)) {
- aurora_wait_CCR(bp->r[chip]);
- sbus_writeb(CCR_SSCH2, &bp->r[chip]->r[CD180_CCR]);
- aurora_wait_CCR(bp->r[chip]);
- }
- sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
- restore_flags(flags);
-#ifdef AURORA_DEBUG
- printk("aurora_throttle: end\n");
-#endif
-}
-
-static void aurora_unthrottle(struct tty_struct * tty)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- struct Aurora_board *bp;
- unsigned long flags;
- unsigned char chip;
-
-#ifdef AURORA_DEBUG
- printk("aurora_unthrottle: start\n");
-#endif
- if ((aurora_paranoia_check(port, tty->name, "aurora_unthrottle"))
- return;
-
- bp = port_Board(port);
-
- chip = AURORA_CD180(port_No(port));
-
- save_flags(flags); cli();
- port->MSVR |= bp->RTS;
- sbus_writeb(port_No(port) & 7,
- &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
- if (I_IXOFF(tty)) {
- aurora_wait_CCR(bp->r[chip]);
- sbus_writeb(CCR_SSCH1,
- &bp->r[chip]->r[CD180_CCR]);
- aurora_wait_CCR(bp->r[chip]);
- }
- sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
- restore_flags(flags);
-#ifdef AURORA_DEBUG
- printk("aurora_unthrottle: end\n");
-#endif
-}
-
-static void aurora_stop(struct tty_struct * tty)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- struct Aurora_board *bp;
- unsigned long flags;
- unsigned char chip;
-
-#ifdef AURORA_DEBUG
- printk("aurora_stop: start\n");
-#endif
- if ((aurora_paranoia_check(port, tty->name, "aurora_stop"))
- return;
-
- bp = port_Board(port);
-
- chip = AURORA_CD180(port_No(port));
-
- save_flags(flags); cli();
- port->SRER &= ~SRER_TXRDY;
- sbus_writeb(port_No(port) & 7,
- &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
- sbus_writeb(port->SRER,
- &bp->r[chip]->r[CD180_SRER]);
- restore_flags(flags);
-#ifdef AURORA_DEBUG
- printk("aurora_stop: end\n");
-#endif
-}
-
-static void aurora_start(struct tty_struct * tty)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- struct Aurora_board *bp;
- unsigned long flags;
- unsigned char chip;
-
-#ifdef AURORA_DEBUG
- printk("aurora_start: start\n");
-#endif
- if ((aurora_paranoia_check(port, tty->name, "aurora_start"))
- return;
-
- bp = port_Board(port);
-
- chip = AURORA_CD180(port_No(port));
-
- save_flags(flags); cli();
- if (port->xmit_cnt && port->xmit_buf && !(port->SRER & SRER_TXRDY)) {
- port->SRER |= SRER_TXRDY;
- sbus_writeb(port_No(port) & 7,
- &bp->r[chip]->r[CD180_CAR]);
- udelay(1);
- sbus_writeb(port->SRER,
- &bp->r[chip]->r[CD180_SRER]);
- }
- restore_flags(flags);
-#ifdef AURORA_DEBUG
- printk("aurora_start: end\n");
-#endif
-}
-
-/*
- * This routine is called from the scheduler tqueue when the interrupt
- * routine has signalled that a hangup has occurred. The path of
- * hangup processing is:
- *
- * serial interrupt routine -> (scheduler tqueue) ->
- * do_aurora_hangup() -> tty->hangup() -> aurora_hangup()
- *
- */
-static void do_aurora_hangup(void *private_)
-{
- struct Aurora_port *port = (struct Aurora_port *) private_;
- struct tty_struct *tty;
-
-#ifdef AURORA_DEBUG
- printk("do_aurora_hangup: start\n");
-#endif
- tty = port->tty;
- if (tty != NULL) {
- tty_hangup(tty); /* FIXME: module removal race - AKPM */
-#ifdef AURORA_DEBUG
- printk("do_aurora_hangup: end\n");
-#endif
- }
-}
-
-static void aurora_hangup(struct tty_struct * tty)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- struct Aurora_board *bp;
-
-#ifdef AURORA_DEBUG
- printk("aurora_hangup: start\n");
-#endif
- if ((aurora_paranoia_check(port, tty->name, "aurora_hangup"))
- return;
-
- bp = port_Board(port);
-
- aurora_shutdown_port(bp, port);
- port->event = 0;
- port->count = 0;
- port->flags &= ~ASYNC_NORMAL_ACTIVE;
- port->tty = 0;
- wake_up_interruptible(&port->open_wait);
-#ifdef AURORA_DEBUG
- printk("aurora_hangup: end\n");
-#endif
-}
-
-static void aurora_set_termios(struct tty_struct * tty, struct termios * old_termios)
-{
- struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
- unsigned long flags;
-
-#ifdef AURORA_DEBUG
- printk("aurora_set_termios: start\n");
-#endif
- if ((aurora_paranoia_check(port, tty->name, "aurora_set_termios"))
- return;
-
- if (tty->termios->c_cflag == old_termios->c_cflag &&
- tty->termios->c_iflag == old_termios->c_iflag)
- return;
-
- save_flags(flags); cli();
- aurora_change_speed(port_Board(port), port);
- restore_flags(flags);
-
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- aurora_start(tty);
- }
-#ifdef AURORA_DEBUG
- printk("aurora_set_termios: end\n");
-#endif
-}
-
-static void do_aurora_bh(void)
-{
- run_task_queue(&tq_aurora);
-}
-
-static void do_softint(void *private_)
-{
- struct Aurora_port *port = (struct Aurora_port *) private_;
- struct tty_struct *tty;
-
-#ifdef AURORA_DEBUG
- printk("do_softint: start\n");
-#endif
- tty = port->tty;
- if (tty == NULL)
- return;
-
- if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) {
- tty_wakeup(tty);
- }
-#ifdef AURORA_DEBUG
- printk("do_softint: end\n");
-#endif
-}
-
-static const struct tty_operations aurora_ops = {
- .open = aurora_open,
- .close = aurora_close,
- .write = aurora_write,
- .put_char = aurora_put_char,
- .flush_chars = aurora_flush_chars,
- .write_room = aurora_write_room,
- .chars_in_buffer = aurora_chars_in_buffer,
- .flush_buffer = aurora_flush_buffer,
- .ioctl = aurora_ioctl,
- .throttle = aurora_throttle,
- .unthrottle = aurora_unthrottle,
- .set_termios = aurora_set_termios,
- .stop = aurora_stop,
- .start = aurora_start,
- .hangup = aurora_hangup,
- .tiocmget = aurora_tiocmget,
- .tiocmset = aurora_tiocmset,
-};
-
-static int aurora_init_drivers(void)
-{
- int error;
- int i;
-
-#ifdef AURORA_DEBUG
- printk("aurora_init_drivers: start\n");
-#endif
- tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL);
- if (tmp_buf == NULL) {
- printk(KERN_ERR "aurora: Couldn't get free page.\n");
- return 1;
- }
- init_bh(AURORA_BH, do_aurora_bh);
- aurora_driver = alloc_tty_driver(AURORA_INPORTS);
- if (!aurora_driver) {
- printk(KERN_ERR "aurora: Couldn't allocate tty driver.\n");
- free_page((unsigned long) tmp_buf);
- return 1;
- }
- aurora_driver->owner = THIS_MODULE;
- aurora_driver->name = "ttyA";
- aurora_driver->major = AURORA_MAJOR;
- aurora_driver->type = TTY_DRIVER_TYPE_SERIAL;
- aurora_driver->subtype = SERIAL_TYPE_NORMAL;
- aurora_driver->init_termios = tty_std_termios;
- aurora_driver->init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- aurora_driver->flags = TTY_DRIVER_REAL_RAW;
- tty_set_operations(aurora_driver, &aurora_ops);
- error = tty_register_driver(aurora_driver);
- if (error) {
- put_tty_driver(aurora_driver);
- free_page((unsigned long) tmp_buf);
- printk(KERN_ERR "aurora: Couldn't register aurora driver, error = %d\n",
- error);
- return 1;
- }
-
- memset(aurora_port, 0, sizeof(aurora_port));
- for (i = 0; i < AURORA_TNPORTS; i++) {
- aurora_port[i].magic = AURORA_MAGIC;
- aurora_port[i].tqueue.routine = do_softint;
- aurora_port[i].tqueue.data = &aurora_port[i];
- aurora_port[i].tqueue_hangup.routine = do_aurora_hangup;
- aurora_port[i].tqueue_hangup.data = &aurora_port[i];
- aurora_port[i].close_delay = 50 * HZ/100;
- aurora_port[i].closing_wait = 3000 * HZ/100;
- init_waitqueue_head(&aurora_port[i].open_wait);
- init_waitqueue_head(&aurora_port[i].close_wait);
- }
-#ifdef AURORA_DEBUG
- printk("aurora_init_drivers: end\n");
-#endif
- return 0;
-}
-
-static void aurora_release_drivers(void)
-{
-#ifdef AURORA_DEBUG
- printk("aurora_release_drivers: start\n");
-#endif
- free_page((unsigned long)tmp_buf);
- tty_unregister_driver(aurora_driver);
- put_tty_driver(aurora_driver);
-#ifdef AURORA_DEBUG
- printk("aurora_release_drivers: end\n");
-#endif
-}
-
-/*
- * 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.
- *
- */
-void __init aurora_setup(char *str, int *ints)
-{
- int i;
-
- for(i=0;(i<ints[0])&&(i<4);i++) {
- if (ints[i+1]) irqs[i]=ints[i+1];
- }
-}
-
-static int __init aurora_real_init(void)
-{
- int found;
- int i;
-
- printk(KERN_INFO "aurora: Driver starting.\n");
- if(aurora_init_drivers())
- return -EIO;
- found = aurora_probe();
- if(!found) {
- aurora_release_drivers();
- printk(KERN_INFO "aurora: No Aurora Multiport boards detected.\n");
- return -EIO;
- } else {
- printk(KERN_INFO "aurora: %d boards found.\n", found);
- }
- for (i = 0; i < found; i++) {
- int ret = aurora_setup_board(&aurora_board[i]);
-
- if (ret) {
-#ifdef AURORA_DEBUG
- printk(KERN_ERR "aurora_init: error aurora_setup_board ret %d\n",
- ret);
-#endif
- return ret;
- }
- }
- return 0;
-}
-
-int irq = 0;
-int irq1 = 0;
-int irq2 = 0;
-int irq3 = 0;
-module_param(irq , int, 0);
-module_param(irq1, int, 0);
-module_param(irq2, int, 0);
-module_param(irq3, int, 0);
-
-static int __init aurora_init(void)
-{
- if (irq ) irqs[0]=irq ;
- if (irq1) irqs[1]=irq1;
- if (irq2) irqs[2]=irq2;
- if (irq3) irqs[3]=irq3;
- return aurora_real_init();
-}
-
-static void __exit aurora_cleanup(void)
-{
- int i;
-
-#ifdef AURORA_DEBUG
-printk("cleanup_module: aurora_release_drivers\n");
-#endif
-
- aurora_release_drivers();
- for (i = 0; i < AURORA_NBOARD; i++)
- if (aurora_board[i].flags & AURORA_BOARD_PRESENT) {
- aurora_shutdown_board(&aurora_board[i]);
- aurora_release_io_range(&aurora_board[i]);
- }
-}
-
-module_init(aurora_init);
-module_exit(aurora_cleanup);
-MODULE_LICENSE("GPL");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff