rocket.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:88k
- /*
- * Rocketport device driver for Linux
- *
- * Written by Theodore Ts'o, 1995, 1996, 1997.
- *
- * Copyright (C) 1995, 1996, 1997 by Comtrol, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- /*
- * Minor number schema:
- *
- * +-------------------------------+
- * | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
- * +---+-------+-------+-----------+
- * | C | Board | AIOP | Port # |
- * +---+-------+-------+-----------+
- *
- * C=0 implements normal POSIX tty.
- * C=1 is reserved for the callout device.
- *
- * Normally, the user won't have to worry about the AIOP; as far as
- * the user is concerned, the lower 5 bits of the minor number address
- * the ports on a particular board (from 0 up to 32).
- */
- /* Kernel includes */
- #include <linux/config.h>
- #include <linux/version.h>
- #ifdef CONFIG_PCI
- #define ENABLE_PCI
- #endif
- #include <linux/module.h>
- #include <linux/errno.h>
- #include <linux/major.h>
- #include <linux/kernel.h>
- #include <linux/signal.h>
- #include <linux/slab.h>
- #include <linux/mm.h>
- #include <linux/sched.h>
- #include <linux/timer.h>
- #include <linux/interrupt.h>
- #include <linux/tty.h>
- #include <linux/tty_flip.h>
- #include <linux/string.h>
- #include <linux/fcntl.h>
- #include <linux/ptrace.h>
- #include <linux/ioport.h>
- #ifdef ENABLE_PCI
- #include <linux/pci.h>
- #if (LINUX_VERSION_CODE < 0x020163) /* 2.1.99 */
- #include <linux/bios32.h>
- #endif
- #endif
- #if (LINUX_VERSION_CODE >= 131343) /* 2.1.15 -- XX get correct version */
- #include <linux/init.h>
- #endif
-
- #include "rocket_int.h"
- #ifdef LOCAL_ROCKET_H
- #include "rocket.h"
- #include "version.h"
- #else
- #include <linux/rocket.h>
- #define ROCKET_VERSION "1.14c"
- #define ROCKET_DATE "24-Aug-98"
- #endif /* LOCAL_ROCKET_H */
- #define ROCKET_PARANOIA_CHECK
- #define ROCKET_SOFT_FLOW
- #undef ROCKET_DEBUG_OPEN
- #undef ROCKET_DEBUG_INTR
- #undef ROCKET_DEBUG_WRITE
- #undef ROCKET_DEBUG_FLOW
- #undef ROCKET_DEBUG_THROTTLE
- #undef ROCKET_DEBUG_WAIT_UNTIL_SENT
- #undef ROCKET_DEBUG_RECEIVE
- #undef ROCKET_DEBUG_HANGUP
-
- /* CAUTION!!!!! The TIME_STAT Function relies on the Pentium 64 bit
- * register. For various reasons related to 1.2.13, the test for this
- * register is omitted from this driver. If you are going to enable
- * this option, make sure you are running a Pentium CPU and that a
- * cat of /proc/cpuinfo shows ability TS Counters as Yes. Warning part
- * done, don't cry to me if you enable this options and things won't
- * work. If it gives you any problems, then disable the option. The code
- * in this function is pretty straight forward, if it breaks on your
- * CPU, there is probably something funny about your CPU.
- */
- #undef TIME_STAT /* For performing timing statistics on driver. */
- /* Produces printks, one every TIME_COUNTER loops, eats */
- /* some of your CPU time. Good for testing or */
- /* other checking, otherwise, leave it undefed */
- /* Doug Ledford */
- #define TIME_STAT_CPU 100 /* This needs to be set to your processor speed */
- /* For example, 100Mhz CPU, set this to 100 */
- #define TIME_COUNTER 180000 /* This is how many iterations to run before */
- /* performing the printk statements. */
- /* 6000 = 1 minute, 360000 = 1 hour, etc. */
- /* Since time_stat is long long, this */
- /* Can be really high if you want :) */
- #undef TIME_STAT_VERBOSE /* Undef this if you want a terse log message. */
- #define _INLINE_ inline
- static struct r_port *rp_table[MAX_RP_PORTS];
- static struct tty_struct *rocket_table[MAX_RP_PORTS];
- static unsigned int xmit_flags[NUM_BOARDS];
- static struct termios *rocket_termios[MAX_RP_PORTS];
- static struct termios *rocket_termios_locked[MAX_RP_PORTS];
- static void rp_wait_until_sent(struct tty_struct *tty, int timeout);
- static void rp_flush_buffer(struct tty_struct *tty);
- static struct tty_driver rocket_driver, callout_driver;
- static int rocket_refcount;
- static int rp_num_ports_open;
- static struct timer_list rocket_timer;
- unsigned long board1;
- unsigned long board2;
- unsigned long board3;
- unsigned long board4;
- unsigned long controller;
- unsigned long support_low_speed;
- int rp_baud_base = 460800;
- static unsigned long rcktpt_io_addr[NUM_BOARDS];
- static int max_board;
- #ifdef TIME_STAT
- static unsigned long long time_stat;
- static unsigned long time_stat_short;
- static unsigned long time_stat_long;
- static unsigned long time_counter;
- #endif
- #if ((LINUX_VERSION_CODE > 0x020111) && defined(MODULE))
- MODULE_AUTHOR("Theodore Ts'o");
- MODULE_DESCRIPTION("Comtrol Rocketport driver");
- MODULE_LICENSE("GPL");
- MODULE_PARM(board1, "i");
- MODULE_PARM_DESC(board1, "I/O port for (ISA) board #1");
- MODULE_PARM(board2, "i");
- MODULE_PARM_DESC(board2, "I/O port for (ISA) board #2");
- MODULE_PARM(board3, "i");
- MODULE_PARM_DESC(board3, "I/O port for (ISA) board #3");
- MODULE_PARM(board4, "i");
- MODULE_PARM_DESC(board4, "I/O port for (ISA) board #4");
- MODULE_PARM(controller, "i");
- MODULE_PARM_DESC(controller, "I/O port for (ISA) rocketport controller");
- MODULE_PARM(support_low_speed, "i");
- MODULE_PARM_DESC(support_low_speed, "0 means support 50 baud, 1 means support 460400 baud");
- #endif
- #if (LINUX_VERSION_CODE < 131336)
- int copy_from_user(void *to, const void *from_user, unsigned long len)
- {
- int error;
- error = verify_area(VERIFY_READ, from_user, len);
- if (error)
- return len;
- memcpy_fromfs(to, from_user, len);
- return 0;
- }
- int copy_to_user(void *to_user, const void *from, unsigned long len)
- {
- int error;
-
- error = verify_area(VERIFY_WRITE, to_user, len);
- if (error)
- return len;
- memcpy_tofs(to_user, from, len);
- return 0;
- }
- static inline int signal_pending(struct task_struct *p)
- {
- return (p->signal & ~p->blocked) != 0;
- }
- #else
- #include <asm/uaccess.h>
- #endif
- /*
- * tmp_buf is used as a temporary buffer by rp_write. We need to
- * lock it in case the memcpy_fromfs blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
- static unsigned char *tmp_buf = 0;
- static DECLARE_MUTEX(tmp_buf_sem);
- static void rp_start(struct tty_struct *tty);
- static inline int rocket_paranoia_check(struct r_port *info,
- kdev_t device, const char *routine)
- {
- #ifdef ROCKET_PARANOIA_CHECK
- static const char *badmagic =
- "Warning: bad magic number for rocketport struct (%d, %d) in %sn";
- if (!info)
- return 1;
- if (info->magic != RPORT_MAGIC) {
- printk(badmagic, MAJOR(device), MINOR(device), routine);
- return 1;
- }
- #endif
- return 0;
- }
- /*
- * Here begins the interrupt/polling routine for the Rocketport!
- */
- static _INLINE_ void rp_do_receive(struct r_port *info, struct tty_struct *tty,
- CHANNEL_t *cp, unsigned int ChanStatus)
- {
- unsigned int CharNStat;
- int ToRecv, wRecv, space, count;
- unsigned char *cbuf;
- char *fbuf;
-
- ToRecv= sGetRxCnt(cp);
- space = 2*TTY_FLIPBUF_SIZE;
- cbuf = tty->flip.char_buf;
- fbuf = tty->flip.flag_buf;
- count = 0;
- #ifdef ROCKET_DEBUG_INTR
- printk("rp_do_receive(%d, %d)...", ToRecv, space);
- #endif
- if (ToRecv == 0 || (space <= 0))
- return;
-
- /*
- * determine how many we can actually read in. If we can't
- * read any in then we have a software overrun condition.
- */
- if (ToRecv > space)
- ToRecv = space;
-
- /*
- * if status indicates there are errored characters in the
- * FIFO, then enter status mode (a word in FIFO holds
- * character and status).
- */
- if (ChanStatus & (RXFOVERFL | RXBREAK | RXFRAME | RXPARITY)) {
- if (!(ChanStatus & STATMODE)) {
- #ifdef ROCKET_DEBUG_RECEIVE
- printk("Entering STATMODE...");
- #endif
- ChanStatus |= STATMODE;
- sEnRxStatusMode(cp);
- }
- }
- /*
- * if we previously entered status mode, then read down the
- * FIFO one word at a time, pulling apart the character and
- * the status. Update error counters depending on status
- */
- if (ChanStatus & STATMODE) {
- #ifdef ROCKET_DEBUG_RECEIVE
- printk("Ignore %x, read %x...", info->ignore_status_mask,
- info->read_status_mask);
- #endif
- while (ToRecv) {
- CharNStat= sInW(sGetTxRxDataIO(cp));
- #ifdef ROCKET_DEBUG_RECEIVE
- printk("%x...", CharNStat);
- #endif
- if (CharNStat & STMBREAKH)
- CharNStat &= ~(STMFRAMEH | STMPARITYH);
- if (CharNStat & info->ignore_status_mask) {
- ToRecv--;
- continue;
- }
- CharNStat &= info->read_status_mask;
- if (CharNStat & STMBREAKH) {
- *fbuf++ = TTY_BREAK;
- #if 0
- if (info->flags & ROCKET_SAK)
- do_SAK(tty);
- #endif
- } else if (CharNStat & STMPARITYH)
- *fbuf++ = TTY_PARITY;
- else if (CharNStat & STMFRAMEH)
- *fbuf++ = TTY_FRAME;
- else if (CharNStat & STMRCVROVRH)
- *fbuf++ =TTY_OVERRUN;
- else
- *fbuf++ = 0;
- *cbuf++ = CharNStat & 0xff;
- count++;
- ToRecv--;
- }
- /*
- * after we've emptied the FIFO in status mode, turn
- * status mode back off
- */
- if (sGetRxCnt(cp) == 0) {
- #ifdef ROCKET_DEBUG_RECEIVE
- printk("Status mode off.n");
- #endif
- sDisRxStatusMode(cp);
- }
- } else {
- /*
- * we aren't in status mode, so read down the FIFO two
- * characters at time by doing repeated word IO
- * transfer.
- */
- wRecv= ToRecv >> 1;
- if (wRecv)
- sInStrW(sGetTxRxDataIO(cp), cbuf,
- wRecv);
- if (ToRecv & 1)
- cbuf[ToRecv-1] = sInB(sGetTxRxDataIO(cp));
- memset(fbuf, 0, ToRecv);
- cbuf += ToRecv;
- fbuf += ToRecv;
- count += ToRecv;
- }
- tty->ldisc.receive_buf(tty, tty->flip.char_buf,
- tty->flip.flag_buf, count);
- }
- /*
- * This routine is called when a transmit interrupt is found. It's
- * responsible for pushing data found in the transmit buffer out to
- * the serial card.
- */
- static _INLINE_ void rp_do_transmit(struct r_port *info)
- {
- int c;
- CHANNEL_t *cp = &info->channel;
- struct tty_struct *tty;
-
- #ifdef ROCKET_DEBUG_INTR
- printk("rp_do_transmit ");
- #endif
- if (!info)
- return;
- if (!info->tty) {
- printk("rp: WARNING rp_do_transmit called with info->tty==NULLn");
- xmit_flags[info->line >> 5] &= ~(1 << (info->line & 0x1f));
- return;
- }
- tty = info->tty;
- info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
- while (1) {
- if (tty->stopped || tty->hw_stopped)
- break;
- c = MIN(info->xmit_fifo_room,
- MIN(info->xmit_cnt,
- XMIT_BUF_SIZE - info->xmit_tail));
- if (c <= 0 || info->xmit_fifo_room <= 0)
- break;
- sOutStrW(sGetTxRxDataIO(cp),
- info->xmit_buf + info->xmit_tail, c/2);
- if (c & 1)
- sOutB(sGetTxRxDataIO(cp),
- info->xmit_buf[info->xmit_tail + c -
- 1]);
- info->xmit_tail += c;
- info->xmit_tail &= XMIT_BUF_SIZE-1;
- info->xmit_cnt -= c;
- info->xmit_fifo_room -= c;
- #ifdef ROCKET_DEBUG_INTR
- printk("tx %d chars...", c);
- #endif
- }
- if (info->xmit_cnt == 0)
- xmit_flags[info->line >> 5] &= ~(1 << (info->line & 0x1f));
- if (info->xmit_cnt < WAKEUP_CHARS) {
- if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
- tty->ldisc.write_wakeup)
- (tty->ldisc.write_wakeup)(tty);
- wake_up_interruptible(&tty->write_wait);
- }
- #ifdef ROCKET_DEBUG_INTR
- printk("(%d,%d,%d,%d)...", info->xmit_cnt, info->xmit_head,
- info->xmit_tail, info->xmit_fifo_room);
- #endif
- }
- /*
- * This function is called for each port which has signalled an
- * interrupt. It checks what interrupts are pending and services
- * them.
- */
- static _INLINE_ void rp_handle_port(struct r_port *info)
- {
- CHANNEL_t *cp;
- struct tty_struct *tty;
- unsigned int IntMask, ChanStatus;
- if (!info)
- return;
- if ( (info->flags & ROCKET_INITIALIZED) == 0 ) {
- printk("rp: WARNING: rp_handle_port called with info->flags & NOT_INITn");
- return;
- }
- if (!info->tty) {
- printk("rp: WARNING: rp_handle_port called with info->tty==NULLn");
- return;
- }
- cp = &info->channel;
- tty = info->tty;
- IntMask = sGetChanIntID(cp) & info->intmask;
- #ifdef ROCKET_DEBUG_INTR
- printk("rp_interrupt %02x...", IntMask);
- #endif
- ChanStatus= sGetChanStatus(cp);
- if (IntMask & RXF_TRIG) { /* Rx FIFO trigger level */
- rp_do_receive(info, tty, cp, ChanStatus);
- }
- #if 0
- if (IntMask & SRC_INT) { /* Special receive condition */
- }
- #endif
- if (IntMask & DELTA_CD) { /* CD change */
- #if (defined(ROCKET_DEBUG_OPEN) || defined(ROCKET_DEBUG_INTR) ||
- defined(ROCKET_DEBUG_HANGUP))
- printk("ttyR%d CD now %s...", info->line,
- (ChanStatus & CD_ACT) ? "on" : "off");
- #endif
- if (!(ChanStatus & CD_ACT) &&
- info->cd_status &&
- !((info->flags & ROCKET_CALLOUT_ACTIVE) &&
- (info->flags & ROCKET_CALLOUT_NOHUP))) {
- #ifdef ROCKET_DEBUG_HANGUP
- printk("CD drop, calling hangup.n");
- #endif
- tty_hangup(tty);
- }
- info->cd_status = (ChanStatus & CD_ACT) ? 1 : 0;
- wake_up_interruptible(&info->open_wait);
- }
- #ifdef ROCKET_DEBUG_INTR
- if (IntMask & DELTA_CTS) { /* CTS change */
- printk("CTS change...n");
- }
- if (IntMask & DELTA_DSR) { /* DSR change */
- printk("DSR change...n");
- }
- #endif
- }
- /*
- * The top level polling routine.
- */
- static void rp_do_poll(unsigned long dummy)
- {
- CONTROLLER_t *ctlp;
- int ctrl, aiop, ch, line;
- unsigned int xmitmask;
- unsigned char CtlMask, AiopMask;
- #ifdef TIME_STAT
- unsigned long loop_time;
- unsigned long long time_stat_tmp=0, time_stat_tmp2=0;
- rdtscll(time_stat_tmp);
- #endif /* TIME_STAT */
- for (ctrl=0; ctrl < max_board; ctrl++) {
- if (rcktpt_io_addr[ctrl] <= 0)
- continue;
- ctlp= sCtlNumToCtlPtr(ctrl);
- #ifdef ENABLE_PCI
- if(ctlp->BusType == isPCI)
- CtlMask= sPCIGetControllerIntStatus(ctlp);
- else
- #endif
- CtlMask= sGetControllerIntStatus(ctlp);
- for (aiop=0; CtlMask; CtlMask >>= 1, aiop++) {
- if (CtlMask & 1) {
- AiopMask= sGetAiopIntStatus(ctlp, aiop);
- for (ch=0; AiopMask; AiopMask >>= 1, ch++) {
- if (AiopMask & 1) {
- line = (ctrl << 5) |
- (aiop << 3) | ch;
- rp_handle_port(rp_table[line]);
- }
- }
- }
- }
- xmitmask = xmit_flags[ctrl];
- for (line = ctrl << 5; xmitmask; xmitmask >>= 1, line++) {
- if (xmitmask & 1)
- rp_do_transmit(rp_table[line]);
- }
- }
- /*
- * Reset the timer so we get called at the next clock tick.
- */
- if (rp_num_ports_open) {
- mod_timer(&rocket_timer, jiffies + 1);
- }
- #ifdef TIME_STAT
- rdtscll(time_stat_tmp2);
- time_stat_tmp2 -= time_stat_tmp;
- time_stat += time_stat_tmp2;
- if (time_counter == 0)
- time_stat_short = time_stat_long = time_stat_tmp2;
- else {
- if ( time_stat_tmp2 < time_stat_short )
- time_stat_short = time_stat_tmp2;
- else if ( time_stat_tmp2 > time_stat_long )
- time_stat_long = time_stat_tmp2;
- }
- if ( ++time_counter == TIME_COUNTER ) {
- loop_time = (unsigned long) ( ((unsigned long)(time_stat >> 32) * ( (unsigned long)(0xffffffff)/(TIME_STAT_CPU * TIME_COUNTER) ) ) + ((unsigned long)time_stat/(TIME_STAT_CPU*TIME_COUNTER)));
- #ifdef TIME_STAT_VERBOSE
- printk("rp_do_poll: Interrupt Timingsn");
- printk(" %5ld iterations; %ld us min,n",
- (long)TIME_COUNTER, (time_stat_short/TIME_STAT_CPU));
- printk(" %5ld us max, %ld us average per iteration.n",
- (time_stat_long/TIME_STAT_CPU), loop_time);
- printk("We want to use < 5,000 us for an iteration.n");
- #else /* TIME_STAT_VERBOSE */
- printk("rp: %ld loops: %ld min, %ld max, %ld us/loop.n",
- (long)TIME_COUNTER, (time_stat_short/TIME_STAT_CPU),
- (time_stat_long/TIME_STAT_CPU), loop_time);
- #endif /* TIME_STAT_VERBOSE */
- time_counter = time_stat = 0;
- time_stat_short = time_stat_long = 0;
- }
- #endif /* TIME_STAT */
- }
- /*
- * Here ends the interrupt/polling routine.
- */
- /*
- * This function initializes the r_port structure, as well as enabling
- * the port on the RocketPort board.
- */
- static void init_r_port(int board, int aiop, int chan)
- {
- struct r_port *info;
- int line;
- CONTROLLER_T *ctlp;
- CHANNEL_t *cp;
-
- line = (board << 5) | (aiop << 3) | chan;
- ctlp= sCtlNumToCtlPtr(board);
- info = kmalloc(sizeof(struct r_port), GFP_KERNEL);
- if (!info) {
- printk("Couldn't allocate info struct for line #%dn", line);
- return;
- }
- memset(info, 0, sizeof(struct r_port));
-
- info->magic = RPORT_MAGIC;
- info->line = line;
- info->ctlp = ctlp;
- info->board = board;
- info->aiop = aiop;
- info->chan = chan;
- info->closing_wait = 3000;
- info->close_delay = 50;
- info->callout_termios =callout_driver.init_termios;
- info->normal_termios = rocket_driver.init_termios;
- init_waitqueue_head(&info->open_wait);
- init_waitqueue_head(&info->close_wait);
- info->intmask = RXF_TRIG | TXFIFO_MT | SRC_INT | DELTA_CD |
- DELTA_CTS | DELTA_DSR;
- if (sInitChan(ctlp, &info->channel, aiop, chan) == 0) {
- printk("Rocketport sInitChan(%d, %d, %d) failed!n",
- board, aiop, chan);
- kfree(info);
- return;
- }
- cp = &info->channel;
- rp_table[line] = info;
- }
- #if (LINUX_VERSION_CODE < 131394) /* Linux 2.1.66 */
- static int baud_table[] = {
- 0, 50, 75, 110, 134, 150, 200, 300,
- 600, 1200, 1800, 2400, 4800, 9600, 19200,
- 38400, 57600, 115200, 230400, 460800, 0 };
- #endif
- /*
- * This routine configures a rocketport port so according to its
- * termio settings.
- */
- static void configure_r_port(struct r_port *info)
- {
- unsigned cflag;
- unsigned long flags;
- int bits, baud;
- #if (LINUX_VERSION_CODE < 131393) /* Linux 2.1.65 */
- int i;
- #endif
- CHANNEL_t *cp;
-
- if (!info->tty || !info->tty->termios)
- return;
- cp = &info->channel;
- cflag = info->tty->termios->c_cflag;
- /* Byte size and parity */
- if ((cflag & CSIZE) == CS8) {
- sSetData8(cp);
- bits = 10;
- } else {
- sSetData7(cp);
- bits = 9;
- }
- if (cflag & CSTOPB) {
- sSetStop2(cp);
- bits++;
- } else {
- sSetStop1(cp);
- }
-
- if (cflag & PARENB) {
- sEnParity(cp);
- bits++;
- if (cflag & PARODD) {
- sSetOddParity(cp);
- } else {
- sSetEvenParity(cp);
- }
- } else {
- sDisParity(cp);
- }
-
- /* baud rate */
- #if (LINUX_VERSION_CODE < 131394) /* Linux 2.1.66 */
- i = cflag & CBAUD;
- if (i & CBAUDEX) {
- i &= ~CBAUDEX;
- if (i < 1 || i > 4)
- info->tty->termios->c_cflag &= ~CBAUDEX;
- else
- i += 15;
- }
- if (i == 15) {
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
- i += 1;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
- i += 2;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
- i += 3;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
- i += 4;
- }
- baud = baud_table[i] ? baud_table[i] : 9600;
- #else
- baud = tty_get_baud_rate(info->tty);
- if (!baud)
- baud = 9600;
- #endif
- info->cps = baud / bits;
- sSetBaud(cp, (rp_baud_base/baud) - 1);
-
- if (cflag & CRTSCTS) {
- info->intmask |= DELTA_CTS;
- sEnCTSFlowCtl(cp);
- } else {
- info->intmask &= ~DELTA_CTS;
- sDisCTSFlowCtl(cp);
- }
- sSetRTS(&info->channel);
- if (cflag & CLOCAL)
- info->intmask &= ~DELTA_CD;
- else {
- save_flags(flags); cli();
- if (sGetChanStatus(cp) & CD_ACT)
- info->cd_status = 1;
- else
- info->cd_status = 0;
- info->intmask |= DELTA_CD;
- restore_flags(flags);
- }
- /*
- * Handle software flow control in the board
- */
- #ifdef ROCKET_SOFT_FLOW
- if (I_IXON(info->tty)) {
- sEnTxSoftFlowCtl(cp);
- if (I_IXANY(info->tty)) {
- sEnIXANY(cp);
- } else {
- sDisIXANY(cp);
- }
- sSetTxXONChar(cp, START_CHAR(info->tty));
- sSetTxXOFFChar(cp, STOP_CHAR(info->tty));
- } else {
- sDisTxSoftFlowCtl(cp);
- sDisIXANY(cp);
- sClrTxXOFF(cp);
- }
- #endif
-
- /*
- * Set up ignore/read mask words
- */
- info->read_status_mask = STMRCVROVRH | 0xFF;
- if (I_INPCK(info->tty))
- info->read_status_mask |= STMFRAMEH | STMPARITYH;
- if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
- info->read_status_mask |= STMBREAKH;
- /*
- * Characters to ignore
- */
- info->ignore_status_mask = 0;
- if (I_IGNPAR(info->tty))
- info->ignore_status_mask |= STMFRAMEH | STMPARITYH;
- if (I_IGNBRK(info->tty)) {
- info->ignore_status_mask |= STMBREAKH;
- /*
- * If we're ignoring parity and break indicators,
- * ignore overruns too. (For real raw support).
- */
- if (I_IGNPAR(info->tty))
- info->ignore_status_mask |= STMRCVROVRH;
- }
- }
- static int block_til_ready(struct tty_struct *tty, struct file * filp,
- struct r_port *info)
- {
- DECLARE_WAITQUEUE(wait, current);
- int retval;
- int do_clocal = 0, extra_count = 0;
- unsigned long flags;
- /*
- * If the device is in the middle of being closed, then block
- * until it's done, and then try again.
- */
- if (tty_hung_up_p(filp))
- return ((info->flags & ROCKET_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS);
- if (info->flags & ROCKET_CLOSING) {
- interruptible_sleep_on(&info->close_wait);
- return ((info->flags & ROCKET_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS);
- }
- /*
- * If this is a callout device, then just make sure the normal
- * device isn't being used.
- */
- if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
- if (info->flags & ROCKET_NORMAL_ACTIVE)
- return -EBUSY;
- if ((info->flags & ROCKET_CALLOUT_ACTIVE) &&
- (info->flags & ROCKET_SESSION_LOCKOUT) &&
- (info->session != current->session))
- return -EBUSY;
- if ((info->flags & ROCKET_CALLOUT_ACTIVE) &&
- (info->flags & ROCKET_PGRP_LOCKOUT) &&
- (info->pgrp != current->pgrp))
- return -EBUSY;
- info->flags |= ROCKET_CALLOUT_ACTIVE;
- return 0;
- }
-
- /*
- * 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))) {
- if (info->flags & ROCKET_CALLOUT_ACTIVE)
- return -EBUSY;
- info->flags |= ROCKET_NORMAL_ACTIVE;
- return 0;
- }
- if (info->flags & ROCKET_CALLOUT_ACTIVE) {
- if (info->normal_termios.c_cflag & CLOCAL)
- do_clocal = 1;
- } else {
- if (tty->termios->c_cflag & CLOCAL)
- do_clocal = 1;
- }
-
- /*
- * Block waiting for the carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, info->count is dropped by one, so that
- * rp_close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
- retval = 0;
- add_wait_queue(&info->open_wait, &wait);
- #ifdef ROCKET_DEBUG_OPEN
- printk("block_til_ready before block: ttyR%d, count = %dn",
- info->line, info->count);
- #endif
- save_flags(flags); cli();
- if (!tty_hung_up_p(filp)) {
- extra_count = 1;
- info->count--;
- }
- restore_flags(flags);
- info->blocked_open++;
- while (1) {
- if (!(info->flags & ROCKET_CALLOUT_ACTIVE) &&
- (tty->termios->c_cflag & CBAUD)) {
- sSetDTR(&info->channel);
- sSetRTS(&info->channel);
- }
- set_current_state(TASK_INTERRUPTIBLE);
- if (tty_hung_up_p(filp) ||
- !(info->flags & ROCKET_INITIALIZED)) {
- if (info->flags & ROCKET_HUP_NOTIFY)
- retval = -EAGAIN;
- else
- retval = -ERESTARTSYS;
- break;
- }
- if (!(info->flags & ROCKET_CALLOUT_ACTIVE) &&
- !(info->flags & ROCKET_CLOSING) &&
- (do_clocal || (sGetChanStatusLo(&info->channel) &
- CD_ACT)))
- break;
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
- #ifdef ROCKET_DEBUG_OPEN
- printk("block_til_ready blocking: ttyR%d, count = %d, flags=0x%0xn",
- info->line, info->count, info->flags);
- #endif
- schedule();
- }
- current->state = TASK_RUNNING;
- remove_wait_queue(&info->open_wait, &wait);
- cli();
- if (extra_count)
- info->count++;
- restore_flags(flags);
- info->blocked_open--;
- #ifdef ROCKET_DEBUG_OPEN
- printk("block_til_ready after blocking: ttyR%d, count = %dn",
- info->line, info->count);
- #endif
- if (retval)
- return retval;
- info->flags |= ROCKET_NORMAL_ACTIVE;
- return 0;
- }
- /*
- * This routine is called whenever a rocketport board is opened.
- */
- static int rp_open(struct tty_struct *tty, struct file * filp)
- {
- struct r_port *info;
- int line, retval;
- CHANNEL_t *cp;
- unsigned long page;
-
- line = MINOR(tty->device) - tty->driver.minor_start;
- if ((line < 0) || (line >= MAX_RP_PORTS))
- return -ENODEV;
- if (!tmp_buf) {
- page = get_free_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
- if (tmp_buf)
- free_page(page);
- else
- tmp_buf = (unsigned char *) page;
- }
- page = get_free_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
- tty->driver_data = info = rp_table[line];
-
- if (info->flags & ROCKET_CLOSING) {
- interruptible_sleep_on(&info->close_wait);
- free_page(page);
- return ((info->flags & ROCKET_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS);
- }
-
- /*
- * We must not sleep from here until the port is marked fully
- * in use.
- */
- if (rp_table[line] == NULL) {
- tty->flags = (1 << TTY_IO_ERROR);
- free_page(page);
- return 0;
- }
- if (!info) {
- printk("rp_open: rp_table[%d] is NULL!n", line);
- free_page(page);
- return -EIO;
- }
- if (info->xmit_buf)
- free_page(page);
- else
- info->xmit_buf = (unsigned char *) page;
- info->tty = tty;
- if (info->flags & ROCKET_CLOSING) {
- interruptible_sleep_on(&info->close_wait);
- return ((info->flags & ROCKET_HUP_NOTIFY) ?
- -EAGAIN : -ERESTARTSYS);
- }
- if (info->count++ == 0) {
- #ifdef MODULE
- MOD_INC_USE_COUNT;
- #endif
- rp_num_ports_open++;
- #ifdef ROCKET_DEBUG_OPEN
- printk("rocket mod++ = %d...", rp_num_ports_open);
- #endif
- }
- #ifdef ROCKET_DEBUG_OPEN
- printk("rp_open ttyR%d, count=%dn", info->line, info->count);
- #endif
- /*
- * Info->count is now 1; so it's safe to sleep now.
- */
- info->session = current->session;
- info->pgrp = current->pgrp;
-
- cp = &info->channel;
- sSetRxTrigger(cp, TRIG_1);
- if (sGetChanStatus(cp) & CD_ACT)
- info->cd_status = 1;
- else
- info->cd_status = 0;
- sDisRxStatusMode(cp);
- sFlushRxFIFO(cp);
- sFlushTxFIFO(cp);
- sEnInterrupts(cp, (TXINT_EN|MCINT_EN|RXINT_EN|SRCINT_EN|CHANINT_EN));
- sSetRxTrigger(cp, TRIG_1);
- sGetChanStatus(cp);
- sDisRxStatusMode(cp);
- sClrTxXOFF(cp);
- sDisCTSFlowCtl(cp);
- sDisTxSoftFlowCtl(cp);
- sEnRxFIFO(cp);
- sEnTransmit(cp);
- info->flags |= ROCKET_INITIALIZED;
- #if (LINUX_VERSION_CODE >= 131394) /* Linux 2.1.66 */
- /*
- * Set up the tty->alt_speed kludge
- */
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
- info->tty->alt_speed = 57600;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
- info->tty->alt_speed = 115200;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
- info->tty->alt_speed = 230400;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
- info->tty->alt_speed = 460800;
- #endif
- configure_r_port(info);
- if (tty->termios->c_cflag & CBAUD) {
- sSetDTR(cp);
- sSetRTS(cp);
- }
-
- mod_timer(&rocket_timer, jiffies + 1);
- retval = block_til_ready(tty, filp, info);
- if (retval) {
- #ifdef ROCKET_DEBUG_OPEN
- printk("rp_open returning after block_til_ready with %dn",
- retval);
- #endif
- return retval;
- }
- if ((info->count == 1) && (info->flags & ROCKET_SPLIT_TERMIOS)) {
- if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
- *tty->termios = info->normal_termios;
- else
- *tty->termios = info->callout_termios;
- configure_r_port(info);
- }
- return 0;
- }
- static void rp_close(struct tty_struct *tty, struct file * filp)
- {
- struct r_port * info = (struct r_port *)tty->driver_data;
- unsigned long flags;
- int timeout;
- CHANNEL_t *cp;
- if (rocket_paranoia_check(info, tty->device, "rp_close"))
- return;
- #ifdef ROCKET_DEBUG_OPEN
- printk("rp_close ttyR%d, count = %dn", info->line, info->count);
- #endif
-
- save_flags(flags); cli();
-
- if (tty_hung_up_p(filp)) {
- restore_flags(flags);
- return;
- }
- if ((tty->count == 1) && (info->count != 1)) {
- /*
- * Uh, oh. tty->count is 1, which means that the tty
- * structure will be freed. Info->count should always
- * be one in these conditions. If it's greater than
- * one, we've got real problems, since it means the
- * serial port won't be shutdown.
- */
- printk("rp_close: bad serial port count; tty->count is 1, "
- "info->count is %dn", info->count);
- info->count = 1;
- }
- if (--info->count < 0) {
- printk("rp_close: bad serial port count for ttyR%d: %dn",
- info->line, info->count);
- info->count = 0;
- }
- if (info->count) {
- restore_flags(flags);
- return;
- }
- info->flags |= ROCKET_CLOSING;
- /*
- * Save the termios structure, since this port may have
- * separate termios for callout and dialin.
- */
- if (info->flags & ROCKET_NORMAL_ACTIVE)
- info->normal_termios = *tty->termios;
- if (info->flags & ROCKET_CALLOUT_ACTIVE)
- info->callout_termios = *tty->termios;
-
- cp = &info->channel;
- /*
- * Notify the line discpline to only process XON/XOFF characters
- */
- tty->closing = 1;
- /*
- * If transmission was throttled by the application request,
- * just flush the xmit buffer.
- */
- #if (LINUX_VERSION_CODE >= 131343)
- if (tty->flow_stopped)
- rp_flush_buffer(tty);
- #endif
- /*
- * Wait for the transmit buffer to clear
- */
- if (info->closing_wait != ROCKET_CLOSING_WAIT_NONE)
- tty_wait_until_sent(tty, info->closing_wait);
- /*
- * Before we drop DTR, make sure the UART transmitter
- * has completely drained; this is especially
- * important if there is a transmit FIFO!
- */
- timeout = (sGetTxCnt(cp)+1) * HZ / info->cps;
- if (timeout == 0)
- timeout = 1;
- rp_wait_until_sent(tty, timeout);
-
- xmit_flags[info->line >> 5] &= ~(1 << (info->line & 0x1f));
- sDisTransmit(cp);
- sDisInterrupts(cp, (TXINT_EN|MCINT_EN|RXINT_EN|SRCINT_EN|CHANINT_EN));
- sDisCTSFlowCtl(cp);
- sDisTxSoftFlowCtl(cp);
- sClrTxXOFF(cp);
- sFlushRxFIFO(cp);
- sFlushTxFIFO(cp);
- sClrRTS(cp);
- if (C_HUPCL(tty)) {
- sClrDTR(cp);
- }
- if (tty->driver.flush_buffer)
- tty->driver.flush_buffer(tty);
- if (tty->ldisc.flush_buffer)
- tty->ldisc.flush_buffer(tty);
- xmit_flags[info->line >> 5] &= ~(1 << (info->line & 0x1f));
- if (info->blocked_open) {
- if (info->close_delay) {
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(info->close_delay);
- }
- wake_up_interruptible(&info->open_wait);
- } else {
- if (info->xmit_buf) {
- free_page((unsigned long) info->xmit_buf);
- info->xmit_buf = 0;
- }
- }
- info->flags &= ~(ROCKET_INITIALIZED | ROCKET_CLOSING |
- ROCKET_CALLOUT_ACTIVE | ROCKET_NORMAL_ACTIVE);
- tty->closing = 0;
- wake_up_interruptible(&info->close_wait);
-
- #ifdef MODULE
- MOD_DEC_USE_COUNT;
- #endif
- rp_num_ports_open--;
- #ifdef ROCKET_DEBUG_OPEN
- printk("rocket mod-- = %d...", rp_num_ports_open);
- #endif
- restore_flags(flags);
-
- #ifdef ROCKET_DEBUG_OPEN
- printk("rp_close ttyR%d complete shutdownn", info->line);
- #endif
-
- }
- static void rp_set_termios(struct tty_struct *tty, struct termios *old_termios)
- {
- struct r_port * info = (struct r_port *)tty->driver_data;
- CHANNEL_t *cp;
- unsigned cflag;
-
- if (rocket_paranoia_check(info, tty->device, "rp_set_termios"))
- return;
- cflag = tty->termios->c_cflag;
- if (cflag == old_termios->c_cflag)
- return;
- /*
- * This driver doesn't support CS5 or CS6
- */
- if (((cflag & CSIZE) == CS5) ||
- ((cflag & CSIZE) == CS6))
- tty->termios->c_cflag = ((cflag & ~CSIZE) |
- (old_termios->c_cflag & CSIZE));
- configure_r_port(info);
- cp = &info->channel;
- /* Handle transition to B0 status */
- if ((old_termios->c_cflag & CBAUD) &&
- !(tty->termios->c_cflag & CBAUD)) {
- sClrDTR(cp);
- sClrRTS(cp);
- }
-
- /* Handle transition away from B0 status */
- if (!(old_termios->c_cflag & CBAUD) &&
- (tty->termios->c_cflag & CBAUD)) {
- if (!tty->hw_stopped ||
- !(tty->termios->c_cflag & CRTSCTS)) {
- sSetRTS(cp);
- }
- sSetDTR(cp);
- }
-
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- rp_start(tty);
- }
- }
- /*
- * Here are the routines used by rp_ioctl
- */
- #if (LINUX_VERSION_CODE < 131394) /* Linux 2.1.66 */
- static void send_break( struct r_port * info, int duration)
- {
- current->state = TASK_INTERRUPTIBLE;
- cli();
- sSendBreak(&info->channel);
- schedule_timeout(duration);
- sClrBreak(&info->channel);
- sti();
- }
- #else
- static void rp_break(struct tty_struct *tty, int break_state)
- {
- struct r_port * info = (struct r_port *)tty->driver_data;
- unsigned long flags;
-
- if (rocket_paranoia_check(info, tty->device, "rp_break"))
- return;
- save_flags(flags); cli();
- if (break_state == -1) {
- sSendBreak(&info->channel);
- } else {
- sClrBreak(&info->channel);
- }
- restore_flags(flags);
- }
- #endif
- static int get_modem_info(struct r_port * info, unsigned int *value)
- {
- unsigned int control, result, ChanStatus;
- ChanStatus = sGetChanStatusLo(&info->channel);
-
- control = info->channel.TxControl[3];
- result = ((control & SET_RTS) ? TIOCM_RTS : 0)
- | ((control & SET_DTR) ? TIOCM_DTR : 0)
- | ((ChanStatus & CD_ACT) ? TIOCM_CAR : 0)
- /* TIOCM_RNG not supported */
- | ((ChanStatus & DSR_ACT) ? TIOCM_DSR : 0)
- | ((ChanStatus & CTS_ACT) ? TIOCM_CTS : 0);
- if (copy_to_user(value, &result, sizeof(int)))
- return -EFAULT;
- return 0;
- }
- static int set_modem_info(struct r_port * info, unsigned int cmd,
- unsigned int *value)
- {
- unsigned int arg;
- if (copy_from_user(&arg, value, sizeof(int)))
- return -EFAULT;
- switch (cmd) {
- case TIOCMBIS:
- if (arg & TIOCM_RTS)
- info->channel.TxControl[3] |= SET_RTS;
- if (arg & TIOCM_DTR)
- info->channel.TxControl[3] |= SET_DTR;
- break;
- case TIOCMBIC:
- if (arg & TIOCM_RTS)
- info->channel.TxControl[3] &= ~SET_RTS;
- if (arg & TIOCM_DTR)
- info->channel.TxControl[3] &= ~SET_DTR;
- break;
- case TIOCMSET:
- info->channel.TxControl[3] =
- ((info->channel.TxControl[3] & ~(SET_RTS | SET_DTR))
- | ((arg & TIOCM_RTS) ? SET_RTS : 0)
- | ((arg & TIOCM_DTR) ? SET_DTR : 0));
- break;
- default:
- return -EINVAL;
- }
- sOutDW(info->channel.IndexAddr,
- *(DWord_t *) &(info->channel.TxControl[0]));
-
- return 0;
- }
- static int get_config(struct r_port * info, struct rocket_config * retinfo)
- {
- struct rocket_config tmp;
-
- if (!retinfo)
- return -EFAULT;
- memset(&tmp, 0, sizeof(tmp));
- tmp.line = info->line;
- tmp.flags = info->flags;
- tmp.close_delay = info->close_delay;
- tmp.closing_wait = info->closing_wait;
- tmp.port = rcktpt_io_addr[(info->line >> 5) & 3];
-
- if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
- return -EFAULT;
- return 0;
- }
- static int set_config(struct r_port * info, struct rocket_config * new_info)
- {
- struct rocket_config new_serial;
- if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
- return -EFAULT;
- #ifdef CAP_SYS_ADMIN
- if (!capable(CAP_SYS_ADMIN))
- #else
- if (!suser())
- #endif
- {
- if ((new_serial.flags & ~ROCKET_USR_MASK) !=
- (info->flags & ~ROCKET_USR_MASK))
- return -EPERM;
- info->flags = ((info->flags & ~ROCKET_USR_MASK) |
- (new_serial.flags & ROCKET_USR_MASK));
- configure_r_port(info);
- return 0;
- }
-
- info->flags = ((info->flags & ~ROCKET_FLAGS) |
- (new_serial.flags & ROCKET_FLAGS));
- info->close_delay = new_serial.close_delay;
- info->closing_wait = new_serial.closing_wait;
- #if (LINUX_VERSION_CODE >= 131394) /* Linux 2.1.66 */
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI)
- info->tty->alt_speed = 57600;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI)
- info->tty->alt_speed = 115200;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI)
- info->tty->alt_speed = 230400;
- if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP)
- info->tty->alt_speed = 460800;
- #endif
-
- configure_r_port(info);
- return 0;
- }
- static int get_ports(struct r_port * info, struct rocket_ports * retports)
- {
- struct rocket_ports tmp;
- int board, port, index;
-
- if (!retports)
- return -EFAULT;
- memset(&tmp, 0, sizeof(tmp));
- tmp.tty_major = rocket_driver.major;
- tmp.callout_major = callout_driver.major;
- for (board = 0; board < 4; board++) {
- index = board << 5;
- for (port = 0; port < 32; port++, index++) {
- if (rp_table[index])
- tmp.port_bitmap[board] |= 1 << port;
- }
- }
- if (copy_to_user(retports,&tmp,sizeof(*retports)))
- return -EFAULT;
- return 0;
- }
- static int rp_ioctl(struct tty_struct *tty, struct file * file,
- unsigned int cmd, unsigned long arg)
- {
- struct r_port * info = (struct r_port *)tty->driver_data;
- #if (LINUX_VERSION_CODE < 131394) /* Linux 2.1.66 */
- int retval, tmp;
- #endif
- if (cmd != RCKP_GET_PORTS &&
- rocket_paranoia_check(info, tty->device, "rp_ioctl"))
- return -ENODEV;
- switch (cmd) {
- #if (LINUX_VERSION_CODE < 131394) /* Linux 2.1.66 */
- 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 (signal_pending(current))
- return -EINTR;
- if (!arg) {
- send_break(info, HZ/4); /* 1/4 second */
- if (signal_pending(current))
- return -EINTR;
- }
- return 0;
- case TCSBRKP: /* support for POSIX tcsendbreak() */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- if (signal_pending(current))
- return -EINTR;
- send_break(info, arg ? arg*(HZ/10) : HZ/4);
- if (signal_pending(current))
- return -EINTR;
- return 0;
- case TIOCGSOFTCAR:
- tmp = C_CLOCAL(tty) ? 1 : 0;
- if (copy_to_user((void *)arg, &tmp, sizeof(int)))
- return -EFAULT;
- return 0;
- case TIOCSSOFTCAR:
- if (copy_from_user(&tmp, (void *)arg, sizeof(int)))
- return -EFAULT;
- tty->termios->c_cflag =
- ((tty->termios->c_cflag & ~CLOCAL) |
- (tmp ? CLOCAL : 0));
- return 0;
- #endif
- case TIOCMGET:
- return get_modem_info(info, (unsigned int *) arg);
- case TIOCMBIS:
- case TIOCMBIC:
- case TIOCMSET:
- return set_modem_info(info, cmd, (unsigned int *) arg);
- case RCKP_GET_STRUCT:
- if (copy_to_user((void *) arg, info,
- sizeof(struct r_port)))
- return -EFAULT;
- return 0;
- case RCKP_GET_CONFIG:
- return get_config(info, (struct rocket_config *) arg);
- case RCKP_SET_CONFIG:
- return set_config(info, (struct rocket_config *) arg);
-
- case RCKP_GET_PORTS:
- return get_ports(info, (struct rocket_ports *) arg);
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
- }
- #if (defined(ROCKET_DEBUG_FLOW) || defined(ROCKET_DEBUG_THROTTLE))
- static char *rp_tty_name(struct tty_struct *tty, char *buf)
- {
- if (tty)
- sprintf(buf, "%s%d", tty->driver.name,
- MINOR(tty->device) - tty->driver.minor_start +
- tty->driver.name_base);
- else
- strcpy(buf, "NULL tty");
- return buf;
- }
- #endif
- static void rp_send_xchar(struct tty_struct *tty, char ch)
- {
- struct r_port *info = (struct r_port *)tty->driver_data;
- CHANNEL_t *cp;
- if (rocket_paranoia_check(info, tty->device, "rp_send_xchar"))
- return;
- cp = &info->channel;
- if (sGetTxCnt(cp))
- sWriteTxPrioByte(cp, ch);
- else
- sWriteTxByte(sGetTxRxDataIO(cp), ch);
- }
- static void rp_throttle(struct tty_struct * tty)
- {
- struct r_port *info = (struct r_port *)tty->driver_data;
- CHANNEL_t *cp;
- #ifdef ROCKET_DEBUG_THROTTLE
- char buf[64];
-
- printk("throttle %s: %d....n", rp_tty_name(tty, buf),
- tty->ldisc.chars_in_buffer(tty));
- #endif
- if (rocket_paranoia_check(info, tty->device, "rp_throttle"))
- return;
- cp = &info->channel;
- if (I_IXOFF(tty))
- rp_send_xchar(tty, STOP_CHAR(tty));
-
- sClrRTS(&info->channel);
- }
- static void rp_unthrottle(struct tty_struct * tty)
- {
- struct r_port *info = (struct r_port *)tty->driver_data;
- CHANNEL_t *cp;
- #ifdef ROCKET_DEBUG_THROTTLE
- char buf[64];
-
- printk("unthrottle %s: %d....n", rp_tty_name(tty, buf),
- tty->ldisc.chars_in_buffer(tty));
- #endif
- if (rocket_paranoia_check(info, tty->device, "rp_throttle"))
- return;
- cp = &info->channel;
- if (I_IXOFF(tty))
- rp_send_xchar(tty, START_CHAR(tty));
- sSetRTS(&info->channel);
- }
- /*
- * ------------------------------------------------------------
- * rp_stop() and rp_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- * ------------------------------------------------------------
- */
- static void rp_stop(struct tty_struct *tty)
- {
- struct r_port * info = (struct r_port *)tty->driver_data;
- #ifdef ROCKET_DEBUG_FLOW
- char buf[64];
-
- printk("stop %s: %d %d....n", rp_tty_name(tty, buf),
- info->xmit_cnt, info->xmit_fifo_room);
- #endif
- if (rocket_paranoia_check(info, tty->device, "rp_stop"))
- return;
- if (sGetTxCnt(&info->channel))
- sDisTransmit(&info->channel);
- }
- static void rp_start(struct tty_struct *tty)
- {
- struct r_port * info = (struct r_port *)tty->driver_data;
- #ifdef ROCKET_DEBUG_FLOW
- char buf[64];
-
- printk("start %s: %d %d....n", rp_tty_name(tty, buf),
- info->xmit_cnt, info->xmit_fifo_room);
- #endif
- if (rocket_paranoia_check(info, tty->device, "rp_stop"))
- return;
- sEnTransmit(&info->channel);
- xmit_flags[info->line >> 5] |= (1 << (info->line & 0x1f));
- }
- /*
- * rp_wait_until_sent() --- wait until the transmitter is empty
- */
- static void rp_wait_until_sent(struct tty_struct *tty, int timeout)
- {
- struct r_port *info = (struct r_port *)tty->driver_data;
- CHANNEL_t *cp;
- unsigned long orig_jiffies;
- int check_time, exit_time;
- int txcnt;
-
- if (rocket_paranoia_check(info, tty->device, "rp_wait_until_sent"))
- return;
- cp = &info->channel;
- orig_jiffies = jiffies;
- #ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT
- printk("In RP_wait_until_sent(%d) (jiff=%lu)...", timeout, jiffies);
- printk("cps=%d...", info->cps);
- #endif
- while (1) {
- txcnt = sGetTxCnt(cp);
- if (!txcnt) {
- if (sGetChanStatusLo(cp) & TXSHRMT)
- break;
- check_time = (HZ / info->cps) / 5;
- } else
- check_time = HZ * txcnt / info->cps;
- if (timeout) {
- exit_time = orig_jiffies + timeout - jiffies;
- if (exit_time <= 0)
- break;
- if (exit_time < check_time)
- check_time = exit_time;
- }
- if (check_time == 0)
- check_time = 1;
- #ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT
- printk("txcnt = %d (jiff=%lu,check=%d)...", txcnt,
- jiffies, check_time);
- #endif
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(check_time);
- if (signal_pending(current))
- break;
- }
- current->state = TASK_RUNNING;
- #ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT
- printk("txcnt = %d (jiff=%lu)...donen", txcnt, jiffies);
- #endif
- }
- /*
- * rp_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
- static void rp_hangup(struct tty_struct *tty)
- {
- CHANNEL_t *cp;
- struct r_port * info = (struct r_port *)tty->driver_data;
-
- if (rocket_paranoia_check(info, tty->device, "rp_hangup"))
- return;
- #if (defined(ROCKET_DEBUG_OPEN) || defined(ROCKET_DEBUG_HANGUP))
- printk("rp_hangup of ttyR%d...", info->line);
- #endif
- /*
- * If the port is in the process of being closed, just force
- * the transmit buffer to be empty, and let rp_close handle
- * the clean up.
- */
- if (info->flags & ROCKET_CLOSING) {
- cli();
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
- sti();
- wake_up_interruptible(&tty->write_wait);
- return;
- }
- if (info->count) {
- #ifdef MODULE
- MOD_DEC_USE_COUNT;
- #endif
- rp_num_ports_open--;
- }
-
- xmit_flags[info->line >> 5] &= ~(1 << (info->line & 0x1f));
- info->count = 0;
- info->flags &= ~(ROCKET_NORMAL_ACTIVE|ROCKET_CALLOUT_ACTIVE);
- info->tty = 0;
- cp = &info->channel;
- sDisRxFIFO(cp);
- sDisTransmit(cp);
- sDisInterrupts(cp, (TXINT_EN|MCINT_EN|RXINT_EN|SRCINT_EN|CHANINT_EN));
- sDisCTSFlowCtl(cp);
- sDisTxSoftFlowCtl(cp);
- sClrTxXOFF(cp);
- info->flags &= ~ROCKET_INITIALIZED;
-
- wake_up_interruptible(&info->open_wait);
- }
- /*
- * The Rocketport write routines. The Rocketport driver uses a
- * double-buffering strategy, with the twist that if the in-memory CPU
- * buffer is empty, and there's space in the transmit FIFO, the
- * writing routines will write directly to transmit FIFO.
- *
- * This gets a little tricky, but I'm pretty sure I got it all right.
- */
- static void rp_put_char(struct tty_struct *tty, unsigned char ch)
- {
- struct r_port * info = (struct r_port *)tty->driver_data;
- CHANNEL_t *cp;
- if (rocket_paranoia_check(info, tty->device, "rp_put_char"))
- return;
- #ifdef ROCKET_DEBUG_WRITE
- printk("rp_put_char %c...", ch);
- #endif
-
- cp = &info->channel;
- if (!tty->stopped && !tty->hw_stopped && info->xmit_fifo_room == 0)
- info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
- if (tty->stopped || tty->hw_stopped ||
- info->xmit_fifo_room == 0 || info->xmit_cnt != 0) {
- info->xmit_buf[info->xmit_head++] = ch;
- info->xmit_head &= XMIT_BUF_SIZE-1;
- info->xmit_cnt++;
- xmit_flags[info->line >> 5] |= (1 << (info->line & 0x1f));
- } else {
- sOutB(sGetTxRxDataIO(cp), ch);
- info->xmit_fifo_room--;
- }
- }
- static int rp_write(struct tty_struct * tty, int from_user,
- const unsigned char *buf, int count)
- {
- struct r_port * info = (struct r_port *)tty->driver_data;
- CHANNEL_t *cp;
- const unsigned char *b;
- int c, retval = 0;
- unsigned long flags;
- if (count <= 0 || rocket_paranoia_check(info, tty->device, "rp_write"))
- return 0;
- #ifdef ROCKET_DEBUG_WRITE
- printk("rp_write %d chars...", count);
- #endif
- cp = &info->channel;
- if (!tty->stopped && !tty->hw_stopped && info->xmit_fifo_room == 0)
- info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp);
- if (!tty->stopped && !tty->hw_stopped && info->xmit_cnt == 0
- && info->xmit_fifo_room >= 0) {
- c = MIN(count, info->xmit_fifo_room);
- b = buf;
- if (from_user) {
- down(&tmp_buf_sem);
- c -= copy_from_user(tmp_buf, buf, c);
- b = tmp_buf;
- up(&tmp_buf_sem);
- /* In case we got pre-empted */
- if (!c) {
- retval = -EFAULT;
- goto end;
- }
- if (info->tty == 0)
- goto end;
- c = MIN(c, info->xmit_fifo_room);
- }
- sOutStrW(sGetTxRxDataIO(cp), b, c/2);
- if (c & 1)
- sOutB(sGetTxRxDataIO(cp), b[c-1]);
- retval += c;
- buf += c;
- count -= c;
- info->xmit_fifo_room -= c;
- }
- if (!count)
- goto end;
-
- save_flags(flags);
- while (1) {
- if (info->tty == 0) {
- restore_flags(flags);
- goto end;
- }
- c = MIN(count, MIN(XMIT_BUF_SIZE - info->xmit_cnt - 1,
- XMIT_BUF_SIZE - info->xmit_head));
- if (c <= 0)
- break;
- b = buf;
- if (from_user) {
- down(&tmp_buf_sem);
- c -= copy_from_user(tmp_buf, buf, c);
- b = tmp_buf;
- up(&tmp_buf_sem);
- if (!c) {
- if (retval == 0)
- retval = -EFAULT;
- goto end_intr;
- }
- /* In case we got pre-empted */
- if (info->tty == 0)
- goto end_intr;
- }
- cli();
- c = MIN(c, MIN(XMIT_BUF_SIZE - info->xmit_cnt - 1,
- XMIT_BUF_SIZE - info->xmit_head));
- memcpy(info->xmit_buf + info->xmit_head, b, c);
- info->xmit_head = (info->xmit_head + c) & (XMIT_BUF_SIZE-1);
- info->xmit_cnt += c;
- restore_flags(flags);
- buf += c;
- count -= c;
- retval += c;
- }
- end_intr:
- if ((retval > 0) && !tty->stopped && !tty->hw_stopped)
- xmit_flags[info->line >> 5] |= (1 << (info->line & 0x1f));
- restore_flags(flags);
- end:
- if (info->xmit_cnt < WAKEUP_CHARS) {
- if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
- tty->ldisc.write_wakeup)
- (tty->ldisc.write_wakeup)(tty);
- wake_up_interruptible(&tty->write_wait);
- }
- return retval;
- }
- /*
- * Return the number of characters that can be sent. We estimate
- * only using the in-memory transmit buffer only, and ignore the
- * potential space in the transmit FIFO.
- */
- static int rp_write_room(struct tty_struct *tty)
- {
- struct r_port * info = (struct r_port *)tty->driver_data;
- int ret;
- if (rocket_paranoia_check(info, tty->device, "rp_write_room"))
- return 0;
- ret = XMIT_BUF_SIZE - info->xmit_cnt - 1;
- if (ret < 0)
- ret = 0;
- #ifdef ROCKET_DEBUG_WRITE
- printk("rp_write_room returns %d...", ret);
- #endif
- return ret;
- }
- /*
- * Return the number of characters in the buffer. Again, this only
- * counts those characters in the in-memory transmit buffer.
- */
- static int rp_chars_in_buffer(struct tty_struct *tty)
- {
- struct r_port * info = (struct r_port *)tty->driver_data;
- CHANNEL_t *cp;
- if (rocket_paranoia_check(info, tty->device, "rp_chars_in_buffer"))
- return 0;
- cp = &info->channel;
- #ifdef ROCKET_DEBUG_WRITE
- printk("rp_chars_in_buffer returns %d...", info->xmit_cnt);
- #endif
- return info->xmit_cnt;
- }
- static void rp_flush_buffer(struct tty_struct *tty)
- {
- struct r_port * info = (struct r_port *)tty->driver_data;
- CHANNEL_t *cp;
- if (rocket_paranoia_check(info, tty->device, "rp_flush_buffer"))
- return;
- cli();
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
- sti();
- wake_up_interruptible(&tty->write_wait);
- if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
- tty->ldisc.write_wakeup)
- (tty->ldisc.write_wakeup)(tty);
-
- cp = &info->channel;
-
- sFlushTxFIFO(cp);
- }
- #ifdef ENABLE_PCI
- #if (LINUX_VERSION_CODE < 0x020163) /* 2.1.99 */
- /* For compatibility */
- static struct pci_dev *pci_find_slot(unsigned char bus,
- unsigned char device_fn)
- {
- unsigned short vendor_id, device_id;
- int ret, error;
- static struct pci_dev ret_struct;
-
- error = pcibios_read_config_word(bus, device_fn, PCI_VENDOR_ID,
- &vendor_id);
- ret = pcibios_read_config_word(bus, device_fn, PCI_DEVICE_ID,
- &device_id);
- if (error == 0)
- error = ret;
- if (error) {
- printk("PCI RocketPort error: %s not initializing due to error"
- "reading configuration spacen",
- pcibios_strerror(error));
- return(0);
- }
- memset(&ret_struct, 0, sizeof(ret_struct));
- ret_struct.device = device_id;
- return &ret_struct;
- }
- #endif
-
- int __init register_PCI(int i, unsigned int bus, unsigned int device_fn)
- {
- int num_aiops, aiop, max_num_aiops, num_chan, chan;
- unsigned int aiopio[MAX_AIOPS_PER_BOARD];
- char *str;
- CONTROLLER_t *ctlp;
- struct pci_dev *dev = pci_find_slot(bus, device_fn);
- #if (LINUX_VERSION_CODE < 0x020163) /* 2.1.99 */
- int ret;
- unsigned int port;
- #endif
- if (!dev)
- return 0;
- if (pci_enable_device(dev))
- return 0;
- rcktpt_io_addr[i] = pci_resource_start (dev, 0);
- switch(dev->device) {
- case PCI_DEVICE_ID_RP4QUAD:
- str = "Quadcable";
- max_num_aiops = 1;
- break;
- case PCI_DEVICE_ID_RP8OCTA:
- str = "Octacable";
- max_num_aiops = 1;
- break;
- case PCI_DEVICE_ID_RP8INTF:
- str = "8";
- max_num_aiops = 1;
- break;
- case PCI_DEVICE_ID_RP8J:
- str = "8J";
- max_num_aiops = 1;
- break;
- case PCI_DEVICE_ID_RP16INTF:
- str = "16";
- max_num_aiops = 2;
- break;
- case PCI_DEVICE_ID_RP32INTF:
- str = "32";
- max_num_aiops = 4;
- break;
- case PCI_DEVICE_ID_RPP4:
- str = "Plus Quadcable";
- max_num_aiops = 1;
- break;
- case PCI_DEVICE_ID_RPP8:
- str = "Plus Octacable";
- max_num_aiops = 1;
- break;
- case PCI_DEVICE_ID_RP8M:
- str = "8-port Modem";
- max_num_aiops = 1;
- break;
- default:
- str = "(unknown/unsupported)";
- max_num_aiops = 0;
- break;
- }
- for(aiop=0;aiop < max_num_aiops;aiop++)
- aiopio[aiop] = rcktpt_io_addr[i] + (aiop * 0x40);
- ctlp = sCtlNumToCtlPtr(i);
- num_aiops = sPCIInitController(ctlp, i,
- aiopio, max_num_aiops, 0,
- FREQ_DIS, 0);
- printk("Rocketport controller #%d found at %02x:%02x, "
- "%d AIOP(s) (PCI Rocketport %s)n", i, bus, device_fn,
- num_aiops, str);
- if(num_aiops <= 0) {
- rcktpt_io_addr[i] = 0;
- return(0);
- }
- for(aiop = 0;aiop < num_aiops; aiop++) {
- sResetAiopByNum(ctlp, aiop);
- sEnAiop(ctlp, aiop);
- num_chan = sGetAiopNumChan(ctlp, aiop);
- for(chan=0;chan < num_chan; chan++)
- init_r_port(i, aiop, chan);
- }
- return(1);
- }
- static int __init init_PCI(int boards_found)
- {
- unsigned char bus, device_fn;
- int i, count = 0;
- for(i=0; i < (NUM_BOARDS - boards_found); i++) {
- if (!pcibios_find_device(PCI_VENDOR_ID_RP,
- PCI_DEVICE_ID_RP4QUAD, i, &bus, &device_fn))
- if (register_PCI(count+boards_found, bus, device_fn))
- count++;
- if (!pcibios_find_device(PCI_VENDOR_ID_RP,
- PCI_DEVICE_ID_RP8J, i, &bus, &device_fn))
- if (register_PCI(count+boards_found, bus, device_fn))
- count++;
- if(!pcibios_find_device(PCI_VENDOR_ID_RP,
- PCI_DEVICE_ID_RP8OCTA, i, &bus, &device_fn))
- if(register_PCI(count+boards_found, bus, device_fn))
- count++;
- if(!pcibios_find_device(PCI_VENDOR_ID_RP,
- PCI_DEVICE_ID_RP8INTF, i, &bus, &device_fn))
- if(register_PCI(count+boards_found, bus, device_fn))
- count++;
- if(!pcibios_find_device(PCI_VENDOR_ID_RP,
- PCI_DEVICE_ID_RP16INTF, i, &bus, &device_fn))
- if(register_PCI(count+boards_found, bus, device_fn))
- count++;
- if(!pcibios_find_device(PCI_VENDOR_ID_RP,
- PCI_DEVICE_ID_RP32INTF, i, &bus, &device_fn))
- if(register_PCI(count+boards_found, bus, device_fn))
- count++;
- if(!pcibios_find_device(PCI_VENDOR_ID_RP,
- PCI_DEVICE_ID_RP4QUAD, i, &bus, &device_fn))
- if(register_PCI(count+boards_found, bus, device_fn))
- count++;
- if(!pcibios_find_device(PCI_VENDOR_ID_RP,
- PCI_DEVICE_ID_RP8J, i, &bus, &device_fn))
- if(register_PCI(count+boards_found, bus, device_fn))
- count++;
- if(!pcibios_find_device(PCI_VENDOR_ID_RP,
- PCI_DEVICE_ID_RPP4, i, &bus, &device_fn))
- if(register_PCI(count+boards_found, bus, device_fn))
- count++;
- if(!pcibios_find_device(PCI_VENDOR_ID_RP,
- PCI_DEVICE_ID_RPP8, i, &bus, &device_fn))
- if(register_PCI(count+boards_found, bus, device_fn))
- count++;
- if(!pcibios_find_device(PCI_VENDOR_ID_RP,
- PCI_DEVICE_ID_RP8M, i, &bus, &device_fn))
- if(register_PCI(count+boards_found, bus, device_fn))
- count++;
- }
- return(count);
- }
- #endif
- static int __init init_ISA(int i, int *reserved_controller)
- {
- int num_aiops, num_chan;
- int aiop, chan;
- unsigned int aiopio[MAX_AIOPS_PER_BOARD];
- CONTROLLER_t *ctlp;
- if (rcktpt_io_addr[i] == 0)
- return(0);
- if (check_region(rcktpt_io_addr[i],64)) {
- printk("RocketPort board address 0x%lx in use...n",
- rcktpt_io_addr[i]);
- rcktpt_io_addr[i] = 0;
- return(0);
- }
-
- for (aiop=0; aiop<MAX_AIOPS_PER_BOARD; aiop++)
- aiopio[aiop]= rcktpt_io_addr[i] + (aiop * 0x400);
- ctlp= sCtlNumToCtlPtr(i);
- num_aiops = sInitController(ctlp, i, controller + (i*0x400),
- aiopio, MAX_AIOPS_PER_BOARD, 0,
- FREQ_DIS, 0);
- if (num_aiops <= 0) {
- rcktpt_io_addr[i] = 0;
- return(0);
- }
- for (aiop = 0; aiop < num_aiops; aiop++) {
- sResetAiopByNum(ctlp, aiop);
- sEnAiop(ctlp, aiop);
- num_chan = sGetAiopNumChan(ctlp,aiop);
- for (chan=0; chan < num_chan; chan++)
- init_r_port(i, aiop, chan);
- }
- printk("Rocketport controller #%d found at 0x%lx, "
- "%d AIOPsn", i, rcktpt_io_addr[i],
- num_aiops);
- if (rcktpt_io_addr[i] + 0x40 == controller) {
- *reserved_controller = 1;
- request_region(rcktpt_io_addr[i], 68,
- "Comtrol Rocketport");
- } else {
- request_region(rcktpt_io_addr[i], 64,
- "Comtrol Rocketport");
- }
- return(1);
- }
- /*
- * The module "startup" routine; it's run when the module is loaded.
- */
- int __init rp_init(void)
- {
- int i, retval, pci_boards_found, isa_boards_found;
- int reserved_controller = 0;
- printk("Rocketport device driver module, version %s, %sn",
- ROCKET_VERSION, ROCKET_DATE);
- /*
- * Set up the timer channel. If it is already in use by
- * some other driver, give up.
- */
- if (rocket_timer.function) {
- printk("rocket.o: Timer already in use!n");
- return -EBUSY;
- }
- init_timer(&rocket_timer);
- rocket_timer.function = rp_do_poll;
-
- /*
- * Initialize the array of pointers to our own internal state
- * structures.
- */
- memset(rp_table, 0, sizeof(rp_table));
- memset(xmit_flags, 0, sizeof(xmit_flags));
- if (board1 == 0)
- board1 = 0x180;
- if (controller == 0)
- controller = board1 + 0x40;
- if (check_region(controller, 4)) {
- printk("Controller IO addresses in use, unloading driver.n");
- return -EBUSY;
- }
-
- rcktpt_io_addr[0] = board1;
- rcktpt_io_addr[1] = board2;
- rcktpt_io_addr[2] = board3;
- rcktpt_io_addr[3] = board4;
- /*
- * If support_low_speed is set, use the slow clock prescale,
- * which supports 50 bps
- */
- if (support_low_speed) {
- sClockPrescale = 0x19; /* mod 9 (divide by 10) prescale */
- rp_baud_base = 230400;
- } else {
- sClockPrescale = 0x14; /* mod 4 (devide by 5) prescale */
- rp_baud_base = 460800;
- }
-
- /*
- * OK, let's probe each of the controllers looking for boards.
- */
- isa_boards_found = 0;
- pci_boards_found = 0;
- for (i=0; i < NUM_BOARDS; i++) {
- if(init_ISA(i, &reserved_controller))
- isa_boards_found++;
- }
- #ifdef ENABLE_PCI
- if (pcibios_present()) {
- if(isa_boards_found < NUM_BOARDS)
- pci_boards_found = init_PCI(isa_boards_found);
- } else {
- printk("No PCI BIOS foundn");
- }
- #endif
- max_board = pci_boards_found + isa_boards_found;
-
- if (max_board == 0) {
- printk("No rocketport ports found; unloading driver.n");
- rocket_timer.function = 0;
- return -ENODEV;
- }
- if (reserved_controller == 0)
- request_region(controller, 4, "Comtrol Rocketport");
- /*
- * Set up the tty driver structure and then register this
- * driver with the tty layer.
- */
- memset(&rocket_driver, 0, sizeof(struct tty_driver));
- rocket_driver.magic = TTY_DRIVER_MAGIC;
- #ifdef CONFIG_DEVFS_FS
- rocket_driver.name = "tts/R%d";
- #else
- rocket_driver.name = "ttyR";
- #endif
- rocket_driver.major = TTY_ROCKET_MAJOR;
- rocket_driver.minor_start = 0;
- rocket_driver.num = MAX_RP_PORTS;
- rocket_driver.type = TTY_DRIVER_TYPE_SERIAL;
- rocket_driver.subtype = SERIAL_TYPE_NORMAL;
- rocket_driver.init_termios = tty_std_termios;
- rocket_driver.init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- rocket_driver.flags = TTY_DRIVER_REAL_RAW;
- rocket_driver.refcount = &rocket_refcount;
- rocket_driver.table = rocket_table;
- rocket_driver.termios = rocket_termios;
- rocket_driver.termios_locked = rocket_termios_locked;
- rocket_driver.open = rp_open;
- rocket_driver.close = rp_close;
- rocket_driver.write = rp_write;
- rocket_driver.put_char = rp_put_char;
- rocket_driver.write_room = rp_write_room;
- rocket_driver.chars_in_buffer = rp_chars_in_buffer;
- rocket_driver.flush_buffer = rp_flush_buffer;
- rocket_driver.ioctl = rp_ioctl;
- rocket_driver.throttle = rp_throttle;
- rocket_driver.unthrottle = rp_unthrottle;
- rocket_driver.set_termios = rp_set_termios;
- rocket_driver.stop = rp_stop;
- rocket_driver.start = rp_start;
- rocket_driver.hangup = rp_hangup;
- #if (LINUX_VERSION_CODE >= 131394) /* Linux 2.1.66 */
- rocket_driver.break_ctl = rp_break;
- #endif
- #if (LINUX_VERSION_CODE >= 131343)
- rocket_driver.send_xchar = rp_send_xchar;
- rocket_driver.wait_until_sent = rp_wait_until_sent;
- #endif
- /*
- * The callout device is just like normal device except for
- * the minor number and the subtype code.
- */
- callout_driver = rocket_driver;
- #ifdef CONFIG_DEVFS_FS
- callout_driver.name = "cua/R%d";
- #else
- callout_driver.name = "cur";
- #endif
- callout_driver.major = CUA_ROCKET_MAJOR;
- callout_driver.minor_start = 0;
- callout_driver.subtype = SERIAL_TYPE_CALLOUT;
-
- retval = tty_register_driver(&callout_driver);
- if (retval < 0) {
- printk("Couldn't install Rocketport callout driver "
- "(error %d)n", -retval);
- return -1;
- }
- retval = tty_register_driver(&rocket_driver);
- if (retval < 0) {
- printk("Couldn't install tty Rocketport driver "
- "(error %d)n", -retval);
- return -1;
- }
- #ifdef ROCKET_DEBUG_OPEN
- printk("Rocketport driver is major %d, callout is %dn",
- rocket_driver.major, callout_driver.major);
- #endif
- return 0;
- }
- #ifdef MODULE
- int init_module(void)
- {
- return rp_init();
- }
- void
- cleanup_module( void) {
- int retval;
- int i;
- int released_controller = 0;
- del_timer_sync(&rocket_timer);
- retval = tty_unregister_driver(&callout_driver);
- if (retval) {
- printk("Error %d while trying to unregister "
- "rocketport callout drivern", -retval);
- }
- retval = tty_unregister_driver(&rocket_driver);
- if (retval) {
- printk("Error %d while trying to unregister "
- "rocketport drivern", -retval);
- }
- for (i = 0; i < MAX_RP_PORTS; i++) {
- if (rp_table[i])
- kfree(rp_table[i]);
- }
- for (i=0; i < NUM_BOARDS; i++) {
- if (rcktpt_io_addr[i] <= 0)
- continue;
- if (rcktpt_io_addr[i] + 0x40 == controller) {
- released_controller++;
- release_region(rcktpt_io_addr[i], 68);
- } else
- release_region(rcktpt_io_addr[i], 64);
- if (released_controller == 0)
- release_region(controller, 4);
- }
- if (tmp_buf)
- free_page((unsigned long) tmp_buf);
- rocket_timer.function = 0;
- }
- #endif
- /***********************************************************************
- Copyright 1994 Comtrol Corporation.
- All Rights Reserved.
- The following source code is subject to Comtrol Corporation's
- Developer's License Agreement.
- This source code is protected by United States copyright law and
- international copyright treaties.
- This source code may only be used to develop software products that
- will operate with Comtrol brand hardware.
- You may not reproduce nor distribute this source code in its original
- form but must produce a derivative work which includes portions of
- this source code only.
- The portions of this source code which you use in your derivative
- work must bear Comtrol's copyright notice:
- Copyright 1994 Comtrol Corporation.
- ***********************************************************************/
- #ifndef TRUE
- #define TRUE 1
- #endif
- #ifndef FALSE
- #define FALSE 0
- #endif
- static Byte_t RData[RDATASIZE] =
- {
- 0x00, 0x09, 0xf6, 0x82,
- 0x02, 0x09, 0x86, 0xfb,
- 0x04, 0x09, 0x00, 0x0a,
- 0x06, 0x09, 0x01, 0x0a,
- 0x08, 0x09, 0x8a, 0x13,
- 0x0a, 0x09, 0xc5, 0x11,
- 0x0c, 0x09, 0x86, 0x85,
- 0x0e, 0x09, 0x20, 0x0a,
- 0x10, 0x09, 0x21, 0x0a,
- 0x12, 0x09, 0x41, 0xff,
- 0x14, 0x09, 0x82, 0x00,
- 0x16, 0x09, 0x82, 0x7b,
- 0x18, 0x09, 0x8a, 0x7d,
- 0x1a, 0x09, 0x88, 0x81,
- 0x1c, 0x09, 0x86, 0x7a,
- 0x1e, 0x09, 0x84, 0x81,
- 0x20, 0x09, 0x82, 0x7c,
- 0x22, 0x09, 0x0a, 0x0a
- };
- static Byte_t RRegData[RREGDATASIZE]=
- {
- 0x00, 0x09, 0xf6, 0x82, /* 00: Stop Rx processor */
- 0x08, 0x09, 0x8a, 0x13, /* 04: Tx software flow control */
- 0x0a, 0x09, 0xc5, 0x11, /* 08: XON char */
- 0x0c, 0x09, 0x86, 0x85, /* 0c: XANY */
- 0x12, 0x09, 0x41, 0xff, /* 10: Rx mask char */
- 0x14, 0x09, 0x82, 0x00, /* 14: Compare/Ignore #0 */
- 0x16, 0x09, 0x82, 0x7b, /* 18: Compare #1 */
- 0x18, 0x09, 0x8a, 0x7d, /* 1c: Compare #2 */
- 0x1a, 0x09, 0x88, 0x81, /* 20: Interrupt #1 */
- 0x1c, 0x09, 0x86, 0x7a, /* 24: Ignore/Replace #1 */
- 0x1e, 0x09, 0x84, 0x81, /* 28: Interrupt #2 */
- 0x20, 0x09, 0x82, 0x7c, /* 2c: Ignore/Replace #2 */
- 0x22, 0x09, 0x0a, 0x0a /* 30: Rx FIFO Enable */
- };
- CONTROLLER_T sController[CTL_SIZE] =
- {
- {-1,-1,0,0,0,0,0,0,0,0,0,{0,0,0,0},{0,0,0,0},{-1,-1,-1,-1},{0,0,0,0}},
- {-1,-1,0,0,0,0,0,0,0,0,0,{0,0,0,0},{0,0,0,0},{-1,-1,-1,-1},{0,0,0,0}},
- {-1,-1,0,0,0,0,0,0,0,0,0,{0,0,0,0},{0,0,0,0},{-1,-1,-1,-1},{0,0,0,0}},
- {-1,-1,0,0,0,0,0,0,0,0,0,{0,0,0,0},{0,0,0,0},{-1,-1,-1,-1},{0,0,0,0}}
- };
- #if 0
- /* IRQ number to MUDBAC register 2 mapping */
- Byte_t sIRQMap[16] =
- {
- 0,0,0,0x10,0x20,0x30,0,0,0,0x40,0x50,0x60,0x70,0,0,0x80
- };
- #endif
- Byte_t sBitMapClrTbl[8] =
- {
- 0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f
- };
- Byte_t sBitMapSetTbl[8] =
- {
- 0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80
- };
- int sClockPrescale = 0x14;
- /***************************************************************************
- Function: sInitController
- Purpose: Initialization of controller global registers and controller
- structure.
- Call: sInitController(CtlP,CtlNum,MudbacIO,AiopIOList,AiopIOListSize,
- IRQNum,Frequency,PeriodicOnly)
- CONTROLLER_T *CtlP; Ptr to controller structure
- int CtlNum; Controller number
- ByteIO_t MudbacIO; Mudbac base I/O address.
- ByteIO_t *AiopIOList; List of I/O addresses for each AIOP.
- This list must be in the order the AIOPs will be found on the
- controller. Once an AIOP in the list is not found, it is
- assumed that there are no more AIOPs on the controller.
- int AiopIOListSize; Number of addresses in AiopIOList
- int IRQNum; Interrupt Request number. Can be any of the following:
- 0: Disable global interrupts
- 3: IRQ 3
- 4: IRQ 4
- 5: IRQ 5
- 9: IRQ 9
- 10: IRQ 10
- 11: IRQ 11
- 12: IRQ 12
- 15: IRQ 15
- Byte_t Frequency: A flag identifying the frequency
- of the periodic interrupt, can be any one of the following:
- FREQ_DIS - periodic interrupt disabled
- FREQ_137HZ - 137 Hertz
- FREQ_69HZ - 69 Hertz
- FREQ_34HZ - 34 Hertz
- FREQ_17HZ - 17 Hertz
- FREQ_9HZ - 9 Hertz
- FREQ_4HZ - 4 Hertz
- If IRQNum is set to 0 the Frequency parameter is
- overidden, it is forced to a value of FREQ_DIS.
- int PeriodicOnly: TRUE if all interrupts except the periodic
- interrupt are to be blocked.
- FALSE is both the periodic interrupt and
- other channel interrupts are allowed.
- If IRQNum is set to 0 the PeriodicOnly parameter is
- overidden, it is forced to a value of FALSE.
- Return: int: Number of AIOPs on the controller, or CTLID_NULL if controller
- initialization failed.
- Comments:
- If periodic interrupts are to be disabled but AIOP interrupts
- are allowed, set Frequency to FREQ_DIS and PeriodicOnly to FALSE.
- If interrupts are to be completely disabled set IRQNum to 0.
- Setting Frequency to FREQ_DIS and PeriodicOnly to TRUE is an
- invalid combination.
- This function performs initialization of global interrupt modes,
- but it does not actually enable global interrupts. To enable
- and disable global interrupts use functions sEnGlobalInt() and
- sDisGlobalInt(). Enabling of global interrupts is normally not
- done until all other initializations are complete.
- Even if interrupts are globally enabled, they must also be
- individually enabled for each channel that is to generate
- interrupts.
- Warnings: No range checking on any of the parameters is done.
- No context switches are allowed while executing this function.
- After this function all AIOPs on the controller are disabled,
- they can be enabled with sEnAiop().
- */
- int sInitController( CONTROLLER_T *CtlP,
- int CtlNum,
- ByteIO_t MudbacIO,
- ByteIO_t *AiopIOList,
- int AiopIOListSize,
- int IRQNum,
- Byte_t Frequency,
- int PeriodicOnly)
- {
- int i;
- ByteIO_t io;
- CtlP->CtlNum = CtlNum;
- CtlP->CtlID = CTLID_0001; /* controller release 1 */
- CtlP->BusType = isISA;
- CtlP->MBaseIO = MudbacIO;
- CtlP->MReg1IO = MudbacIO + 1;
- CtlP->MReg2IO = MudbacIO + 2;
- CtlP->MReg3IO = MudbacIO + 3;
- #if 1
- CtlP->MReg2 = 0; /* interrupt disable */
- CtlP->MReg3 = 0; /* no periodic interrupts */
- #else
- if(sIRQMap[IRQNum] == 0) /* interrupts globally disabled */
- {
- CtlP->MReg2 = 0; /* interrupt disable */
- CtlP->MReg3 = 0; /* no periodic interrupts */
- }
- else
- {
- CtlP->MReg2 = sIRQMap[IRQNum]; /* set IRQ number */
- CtlP->MReg3 = Frequency; /* set frequency */
- if(PeriodicOnly) /* periodic interrupt only */
- {
- CtlP->MReg3 |= PERIODIC_ONLY;
- }
- }
- #endif
- sOutB(CtlP->MReg2IO,CtlP->MReg2);
- sOutB(CtlP->MReg3IO,CtlP->MReg3);
- sControllerEOI(CtlP); /* clear EOI if warm init */
- /* Init AIOPs */
- CtlP->NumAiop = 0;
- for(i=0; i < AiopIOListSize; i++)
- {
- io = AiopIOList[i];
- CtlP->AiopIO[i] = (WordIO_t)io;
- CtlP->AiopIntChanIO[i] = io + _INT_CHAN;
- sOutB(CtlP->MReg2IO,CtlP->MReg2 | (i & 0x03)); /* AIOP index */
- sOutB(MudbacIO,(Byte_t)(io >> 6)); /* set up AIOP I/O in MUDBAC */
- sEnAiop(CtlP,i); /* enable the AIOP */
- CtlP->AiopID[i] = sReadAiopID(io); /* read AIOP ID */
- if(CtlP->AiopID[i] == AIOPID_NULL) /* if AIOP does not exist */
- {
- sDisAiop(CtlP,i); /* disable AIOP */
- break; /* done looking for AIOPs */
- }
- CtlP->AiopNumChan[i] = sReadAiopNumChan((WordIO_t)io); /* num channels in AIOP */
- sOutW((WordIO_t)io + _INDX_ADDR,_CLK_PRE); /* clock prescaler */
- sOutB(io + _INDX_DATA,sClockPrescale);
- CtlP->NumAiop++; /* bump count of AIOPs */
- sDisAiop(CtlP,i); /* disable AIOP */
- }
- if(CtlP->NumAiop == 0)
- return(-1);
- else
- return(CtlP->NumAiop);
- }
- /***************************************************************************
- Function: sPCIInitController
- Purpose: Initialization of controller global registers and controller
- structure.
- Call: sPCIInitController(CtlP,CtlNum,AiopIOList,AiopIOListSize,
- IRQNum,Frequency,PeriodicOnly)
- CONTROLLER_T *CtlP; Ptr to controller structure
- int CtlNum; Controller number
- ByteIO_t *AiopIOList; List of I/O addresses for each AIOP.
- This list must be in the order the AIOPs will be found on the
- controller. Once an AIOP in the list is not found, it is
- assumed that there are no more AIOPs on the controller.
- int AiopIOListSize; Number of addresses in AiopIOList
- int IRQNum; Interrupt Request number. Can be any of the following:
- 0: Disable global interrupts
- 3: IRQ 3
- 4: IRQ 4
- 5: IRQ 5
- 9: IRQ 9
- 10: IRQ 10
- 11: IRQ 11
- 12: IRQ 12
- 15: IRQ 15
- Byte_t Frequency: A flag identifying the frequency
- of the periodic interrupt, can be any one of the following:
- FREQ_DIS - periodic interrupt disabled
- FREQ_137HZ - 137 Hertz
- FREQ_69HZ - 69 Hertz
- FREQ_34HZ - 34 Hertz
- FREQ_17HZ - 17 Hertz
- FREQ_9HZ - 9 Hertz
- FREQ_4HZ - 4 Hertz
- If IRQNum is set to 0 the Frequency parameter is
- overidden, it is forced to a value of FREQ_DIS.
- int PeriodicOnly: TRUE if all interrupts except the periodic
- interrupt are to be blocked.
- FALSE is both the periodic interrupt and
- other channel interrupts are allowed.
- If IRQNum is set to 0 the PeriodicOnly parameter is
- overidden, it is forced to a value of FALSE.
- Return: int: Number of AIOPs on the controller, or CTLID_NULL if controller
- initialization failed.
- Comments:
- If periodic interrupts are to be disabled but AIOP interrupts
- are allowed, set Frequency to FREQ_DIS and PeriodicOnly to FALSE.
- If interrupts are to be completely disabled set IRQNum to 0.
- Setting Frequency to FREQ_DIS and PeriodicOnly to TRUE is an
- invalid combination.
- This function performs initialization of global interrupt modes,
- but it does not actually enable global interrupts. To enable
- and disable global interrupts use functions sEnGlobalInt() and
- sDisGlobalInt(). Enabling of global interrupts is normally not
- done until all other initializations are complete.
- Even if interrupts are globally enabled, they must also be
- individually enabled for each channel that is to generate
- interrupts.
- Warnings: No range checking on any of the parameters is done.
- No context switches are allowed while executing this function.
- After this function all AIOPs on the controller are disabled,
- they can be enabled with sEnAiop().
- */
- int sPCIInitController( CONTROLLER_T *CtlP,
- int CtlNum,
- ByteIO_t *AiopIOList,
- int AiopIOListSize,
- int IRQNum,
- Byte_t Frequency,
- int PeriodicOnly)
- {
- int i;
- ByteIO_t io;
- CtlP->CtlNum = CtlNum;
- CtlP->CtlID = CTLID_0001; /* controller release 1 */
- CtlP->BusType = isPCI; /* controller release 1 */
- CtlP->PCIIO = (WordIO_t)((ByteIO_t)AiopIOList[0] + _PCI_INT_FUNC);
- sPCIControllerEOI(CtlP); /* clear EOI if warm init */
- /* Init AIOPs */
- CtlP->NumAiop = 0;
- for(i=0; i < AiopIOListSize; i++)
- {
- io = AiopIOList[i];
- CtlP->AiopIO[i] = (WordIO_t)io;
- CtlP->AiopIntChanIO[i] = io + _INT_CHAN;
- CtlP->AiopID[i] = sReadAiopID(io); /* read AIOP ID */
- if(CtlP->AiopID[i] == AIOPID_NULL) /* if AIOP does not exist */
- break; /* done looking for AIOPs */
- CtlP->AiopNumChan[i] = sReadAiopNumChan((WordIO_t)io); /* num channels in AIOP */
- sOutW((WordIO_t)io + _INDX_ADDR,_CLK_PRE); /* clock prescaler */
- sOutB(io + _INDX_DATA,sClockPrescale);
- CtlP->NumAiop++; /* bump count of AIOPs */
- }
- if(CtlP->NumAiop == 0)
- return(-1);
- else
- return(CtlP->NumAiop);
- }
- /***************************************************************************
- Function: sReadAiopID
- Purpose: Read the AIOP idenfication number directly from an AIOP.
- Call: sReadAiopID(io)
- ByteIO_t io: AIOP base I/O address
- Return: int: Flag AIOPID_XXXX if a valid AIOP is found, where X
- is replace by an identifying number.
- Flag AIOPID_NULL if no valid AIOP is found
- Warnings: No context switches are allowed while executing this function.
- */
- int sReadAiopID(ByteIO_t io)
- {
- Byte_t AiopID; /* ID byte from AIOP */
- sOutB(io + _CMD_REG,RESET_ALL); /* reset AIOP */
- sOutB(io + _CMD_REG,0x0);
- AiopID = sInB(io + _CHN_STAT0) & 0x07;
- if(AiopID == 0x06)
- return(1);
- else /* AIOP does not exist */
- return(-1);
- }
- /***************************************************************************
- Function: sReadAiopNumChan
- Purpose: Read the number of channels available in an AIOP directly from
- an AIOP.
- Call: sReadAiopNumChan(io)
- WordIO_t io: AIOP base I/O address
- Return: int: The number of channels available
- Comments: The number of channels is determined by write/reads from identical
- offsets within the SRAM address spaces for channels 0 and 4.
- If the channel 4 space is mirrored to channel 0 it is a 4 channel
- AIOP, otherwise it is an 8 channel.
- Warnings: No context switches are allowed while executing this function.
- */
- int sReadAiopNumChan(WordIO_t io)
- {
- Word_t x;
- sOutDW((DWordIO_t)io + _INDX_ADDR,0x12340000L); /* write to chan 0 SRAM */
- sOutW(io + _INDX_ADDR,0); /* read from SRAM, chan 0 */
- x = sInW(io + _INDX_DATA);
- sOutW(io + _INDX_ADDR,0x4000); /* read from SRAM, chan 4 */
- if(x != sInW(io + _INDX_DATA)) /* if different must be 8 chan */
- return(8);
- else
- return(4);
- }
- /***************************************************************************
- Function: sInitChan
- Purpose: Initialization of a channel and channel structure
- Call: sInitChan(CtlP,ChP,AiopNum,ChanNum)
- CONTROLLER_T *CtlP; Ptr to controller structure
- CHANNEL_T *ChP; Ptr to channel structure
- int AiopNum; AIOP number within controller
- int ChanNum; Channel number within AIOP
- Return: int: TRUE if initialization succeeded, FALSE if it fails because channel
- number exceeds number of channels available in AIOP.
- Comments: This function must be called before a channel can be used.
- Warnings: No range checking on any of the parameters is done.
- No context switches are allowed while executing this function.
- */
- int sInitChan( CONTROLLER_T *CtlP,
- CHANNEL_T *ChP,
- int AiopNum,
- int ChanNum)
- {
- int i;
- WordIO_t AiopIO;
- WordIO_t ChIOOff;
- Byte_t *ChR;
- Word_t ChOff;
- static Byte_t R[4];
- int brd9600;
- if(ChanNum >= CtlP->AiopNumChan[AiopNum])
- return(FALSE); /* exceeds num chans in AIOP */
- /* Channel, AIOP, and controller identifiers */
- ChP->CtlP = CtlP;
- ChP->ChanID = CtlP->AiopID[AiopNum];
- ChP->AiopNum = AiopNum;
- ChP->ChanNum = ChanNum;
- /* Global direct addresses */
- AiopIO = CtlP->AiopIO[AiopNum];
- ChP->Cmd = (ByteIO_t)AiopIO + _CMD_REG;
- ChP->IntChan = (ByteIO_t)AiopIO + _INT_CHAN;
- ChP->IntMask = (ByteIO_t)AiopIO + _INT_MASK;
- ChP->IndexAddr = (DWordIO_t)AiopIO + _INDX_ADDR;
- ChP->IndexData = AiopIO + _INDX_DATA;
- /* Channel direct addresses */
- ChIOOff = AiopIO + ChP->ChanNum * 2;
- ChP->TxRxData = ChIOOff + _TD0;
- ChP->ChanStat = ChIOOff + _CHN_STAT0;
- ChP->TxRxCount = ChIOOff + _FIFO_CNT0;
- ChP->IntID = (ByteIO_t)AiopIO + ChP->ChanNum + _INT_ID0;
- /* Initialize the channel from the RData array */
- for(i=0; i < RDATASIZE; i+=4)
- {
- R[0] = RData[i];
- R[1] = RData[i+1] + 0x10 * ChanNum;
- R[2] = RData[i+2];
- R[3] = RData[i+3];
- sOutDW(ChP->IndexAddr,*((DWord_t *)&R[0]));
- }
- ChR = ChP->R;
- for(i=0; i < RREGDATASIZE; i+=4)
- {
- ChR[i] = RRegData[i];
- ChR[i+1] = RRegData[i+1] + 0x10 * ChanNum;
- ChR[i+2] = RRegData[i+2];
- ChR[i+3] = RRegData[i+3];
- }
- /* Indexed registers */
- ChOff = (Word_t)ChanNum * 0x1000;
- if (sClockPrescale == 0x14)
- brd9600 = 47;
- else
- brd9600 = 23;
- ChP->BaudDiv[0] = (Byte_t)(ChOff + _BAUD);
- ChP->BaudDiv[1] = (Byte_t)((ChOff + _BAUD) >> 8);
- ChP->BaudDiv[2] = (Byte_t)brd9600;
- ChP->BaudDiv[3] = (Byte_t)(brd9600 >> 8);
- sOutDW(ChP->IndexAddr,*(DWord_t *)&ChP->BaudDiv[0]);
- ChP->TxControl[0] = (Byte_t)(ChOff + _TX_CTRL);
- ChP->TxControl[1] = (Byte_t)((ChOff + _TX_CTRL) >> 8);
- ChP->TxControl[2] = 0;
- ChP->TxControl[3] = 0;
- sOutDW(ChP->IndexAddr,*(DWord_t *)&ChP->TxControl[0]);
- ChP->RxControl[0] = (Byte_t)(ChOff + _RX_CTRL);
- ChP->RxControl[1] = (Byte_t)((ChOff + _RX_CTRL) >> 8);
- ChP->RxControl[2] = 0;
- ChP->RxControl[3] = 0;
- sOutDW(ChP->IndexAddr,*(DWord_t *)&ChP->RxControl[0]);
- ChP->TxEnables[0] = (Byte_t)(ChOff + _TX_ENBLS);
- ChP->TxEnables[1] = (Byte_t)((ChOff + _TX_ENBLS) >> 8);
- ChP->TxEnables[2] = 0;
- ChP->TxEnables[3] = 0;
- sOutDW(ChP->IndexAddr,*(DWord_t *)&ChP->TxEnables[0]);
- ChP->TxCompare[0] = (Byte_t)(ChOff + _TXCMP1);
- ChP->TxCompare[1] = (Byte_t)((ChOff + _TXCMP1) >> 8);
- ChP->TxCompare[2] = 0;
- ChP->TxCompare[3] = 0;
- sOutDW(ChP->IndexAddr,*(DWord_t *)&ChP->TxCompare[0]);
- ChP->TxReplace1[0] = (Byte_t)(ChOff + _TXREP1B1);
- ChP->TxReplace1[1] = (Byte_t)((ChOff + _TXREP1B1) >> 8);
- ChP->TxReplace1[2] = 0;
- ChP->TxReplace1[3] = 0;
- sOutDW(ChP->IndexAddr,*(DWord_t *)&ChP->TxReplace1[0]);
- ChP->TxReplace2[0] = (Byte_t)(ChOff + _TXREP2);
- ChP->TxReplace2[1] = (Byte_t)((ChOff + _TXREP2) >> 8);
- ChP->TxReplace2[2] = 0;
- ChP->TxReplace2[3] = 0;
- sOutDW(ChP->IndexAddr,*(DWord_t *)&ChP->TxReplace2[0]);
- ChP->TxFIFOPtrs = ChOff + _TXF_OUTP;
- ChP->TxFIFO = ChOff + _TX_FIFO;
- sOutB(ChP->Cmd,(Byte_t)ChanNum | RESTXFCNT); /* apply reset Tx FIFO count */
- sOutB(ChP->Cmd,(Byte_t)ChanNum); /* remove reset Tx FIFO count */
- sOutW((WordIO_t)ChP->IndexAddr,ChP->TxFIFOPtrs); /* clear Tx in/out ptrs */
- sOutW(ChP->IndexData,0);
- ChP->RxFIFOPtrs = ChOff + _RXF_OUTP;
- ChP->RxFIFO = ChOff + _RX_FIFO;
- sOutB(ChP->Cmd,(Byte_t)ChanNum | RESRXFCNT); /* apply reset Rx FIFO count */
- sOutB(ChP->Cmd,(Byte_t)ChanNum); /* remove reset Rx FIFO count */
- sOutW((WordIO_t)ChP->IndexAddr,ChP->RxFIFOPtrs); /* clear Rx out ptr */
- sOutW(ChP->IndexData,0);
- sOutW((WordIO_t)ChP->IndexAddr,ChP->RxFIFOPtrs + 2); /* clear Rx in ptr */
- sOutW(ChP->IndexData,0);
- ChP->TxPrioCnt = ChOff + _TXP_CNT;
- sOutW((WordIO_t)ChP->IndexAddr,ChP->TxPrioCnt);
- sOutB(ChP->IndexData,0);
- ChP->TxPrioPtr = ChOff + _TXP_PNTR;
- sOutW((WordIO_t)ChP->IndexAddr,ChP->TxPrioPtr);
- sOutB(ChP->IndexData,0);
- ChP->TxPrioBuf = ChOff + _TXP_BUF;
- sEnRxProcessor(ChP); /* start the Rx processor */
- return(TRUE);
- }
- /***************************************************************************
- Function: sStopRxProcessor
- Purpose: Stop the receive processor from processing a channel.
- Call: sStopRxProcessor(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
- Comments: The receive processor can be started again with sStartRxProcessor().
- This function causes the receive processor to skip over the
- stopped channel. It does not stop it from processing other channels.
- Warnings: No context switches are allowed while executing this function.
- Do not leave the receive processor stopped for more than one
- character time.
- After calling this function a delay of 4 uS is required to ensure
- that the receive processor is no longer processing this channel.
- */
- void sStopRxProcessor(CHANNEL_T *ChP)
- {
- Byte_t R[4];
- R[0] = ChP->R[0];
- R[1] = ChP->R[1];
- R[2] = 0x0a;
- R[3] = ChP->R[3];
- sOutDW(ChP->IndexAddr,*(DWord_t *)&R[0]);
- }
- /***************************************************************************
- Function: sFlushRxFIFO
- Purpose: Flush the Rx FIFO
- Call: sFlushRxFIFO(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
- Return: void
- Comments: To prevent data from being enqueued or dequeued in the Tx FIFO
- while it is being flushed the receive processor is stopped
- and the transmitter is disabled. After these operations a
- 4 uS delay is done before clearing the pointers to allow
- the receive processor to stop. These items are handled inside
- this function.
- Warnings: No context switches are allowed while executing this function.
- */
- void sFlushRxFIFO(CHANNEL_T *ChP)
- {
- int i;
- Byte_t Ch; /* channel number within AIOP */
- int RxFIFOEnabled; /* TRUE if Rx FIFO enabled */
- if(sGetRxCnt(ChP) == 0) /* Rx FIFO empty */
- return; /* don't need to flush */
- RxFIFOEnabled = FALSE;
- if(ChP->R[0x32] == 0x08) /* Rx FIFO is enabled */
- {
- RxFIFOEnabled = TRUE;
- sDisRxFIFO(ChP); /* disable it */
- for(i=0; i < 2000/200; i++) /* delay 2 uS to allow proc to disable FIFO*/
- sInB(ChP->IntChan); /* depends on bus i/o timing */
- }
- sGetChanStatus(ChP); /* clear any pending Rx errors in chan stat */
- Ch = (Byte_t)sGetChanNum(ChP);
- sOutB(ChP->Cmd,Ch | RESRXFCNT); /* apply reset Rx FIFO count */
- sOutB(ChP->Cmd,Ch); /* remove reset Rx FIFO count */
- sOutW((WordIO_t)ChP->IndexAddr,ChP->RxFIFOPtrs); /* clear Rx out ptr */
- sOutW(ChP->IndexData,0);
- sOutW((WordIO_t)ChP->IndexAddr,ChP->RxFIFOPtrs + 2); /* clear Rx in ptr */
- sOutW(ChP->IndexData,0);
- if(RxFIFOEnabled)
- sEnRxFIFO(ChP); /* enable Rx FIFO */
- }
- /***************************************************************************
- Function: sFlushTxFIFO
- Purpose: Flush the Tx FIFO
- Call: sFlushTxFIFO(ChP)
- CHANNEL_T *ChP; Ptr to channel structure
- Return: void
- Comments: To prevent data from being enqueued or dequeued in the Tx FIFO
- while it is being flushed the receive processor is stopped
- and the transmitter is disabled. After these operations a
- 4 uS delay is done before clearing the pointers to allow
- the receive processor to stop. These items are handled inside
- this function.
- Warnings: No context switches are allowed while executing this function.
- */
- void sFlushTxFIFO(CHANNEL_T *ChP)
- {
- int i;
- Byte_t Ch; /* channel number within AIOP */
- int TxEnabled; /* TRUE if transmitter enabled */
- if(sGetTxCnt(ChP) == 0) /* Tx FIFO empty */
- return; /* don't need to flush */
- TxEnabled = FALSE;
- if(ChP->TxControl[3] & TX_ENABLE)
- {
- TxEnabled = TRUE;
- sDisTransmit(ChP); /* disable transmitter */
- }
- sStopRxProcessor(ChP); /* stop Rx processor */
- for(i = 0; i < 4000/200; i++) /* delay 4 uS to allow proc to stop */
- sInB(ChP->IntChan); /* depends on bus i/o timing */
- Ch = (Byte_t)sGetChanNum(ChP);
- sOutB(ChP->Cmd,Ch | RESTXFCNT); /* apply reset Tx FIFO count */
- sOutB(ChP->Cmd,Ch); /* remove reset Tx FIFO count */
- sOutW((WordIO_t)ChP->IndexAddr,ChP->TxFIFOPtrs); /* clear Tx in/out ptrs */
- sOutW(ChP->IndexData,0);
- if(TxEnabled)
- sEnTransmit(ChP); /* enable transmitter */
- sStartRxProcessor(ChP); /* restart Rx processor */
- }
- /***************************************************************************
- Function: sWriteTxPrioByte
- Purpose: Write a byte of priority transmit data to a channel
- Call: sWriteTxPrioByte(ChP,Data)
- CHANNEL_T *ChP; Ptr to channel structure
- Byte_t Data; The transmit data byte
- Return: int: 1 if the bytes is successfully written, otherwise 0.
- Comments: The priority byte is transmitted before any data in the Tx FIFO.
- Warnings: No context switches are allowed while executing this function.
- */
- int sWriteTxPrioByte(CHANNEL_T *ChP, Byte_t Data)
- {
- Byte_t DWBuf[4]; /* buffer for double word writes */
- Word_t *WordPtr; /* must be far because Win SS != DS */
- register DWordIO_t IndexAddr;
- if(sGetTxCnt(ChP) > 1) /* write it to Tx priority buffer */
- {
- IndexAddr = ChP->IndexAddr;
- sOutW((WordIO_t)IndexAddr,ChP->TxPrioCnt); /* get priority buffer status */
- if(sInB((ByteIO_t)ChP->IndexData) & PRI_PEND) /* priority buffer busy */
- return(0); /* nothing sent */
- WordPtr = (Word_t *)(&DWBuf[0]);
- *WordPtr = ChP->TxPrioBuf; /* data byte address */
- DWBuf[2] = Data; /* data byte value */
- sOutDW(IndexAddr,*((DWord_t *)(&DWBuf[0]))); /* write it out */
- *WordPtr = ChP->TxPrioCnt; /* Tx priority count address */
- DWBuf[2] = PRI_PEND + 1; /* indicate 1 byte pending */
- DWBuf[3] = 0; /* priority buffer pointer */
- sOutDW(IndexAddr,*((DWord_t *)(&DWBuf[0]))); /* write it out */
- }
- else /* write it to Tx FIFO */
- {
- sWriteTxByte(sGetTxRxDataIO(ChP),Data);
- }
- return(1); /* 1 byte sent */
- }
- /***************************************************************************
- Function: sEnInterrupts
- Purpose: Enable one or more interrupts for a channel
- Call: sEnInterrupts(ChP,Flags)
- CHANNEL_T *ChP; Ptr to channel structure
- Word_t Flags: Interrupt enable flags, can be any combination
- of the following flags:
- TXINT_EN: Interrupt on Tx FIFO empty
- RXINT_EN: Interrupt on Rx FIFO at trigger level (see
- sSetRxTrigger())
- SRCINT_EN: Interrupt on SRC (Special Rx Condition)
- MCINT_EN: Interrupt on modem input change
- CHANINT_EN: Allow channel interrupt signal to the AIOP's
- Interrupt Channel Register.
- Return: void
- Comments: If an interrupt enable flag is set in Flags, that interrupt will be
- enabled. If an interrupt enable flag is not set in Flags, that
- interrupt will not be changed. Interrupts can be disabled with
- function sDisInterrupts().
- This function sets the appropriate bit for the channel in the AIOP's
- Interrupt Mask Register if the CHANINT_EN flag is set. This allows
- this channel's bit to be set in the AIOP's Interrupt Channel Register.
- Interrupts must also be globally enabled before channel interrupts
- will be passed on to the host. This is done with function
- sEnGlobalInt().
- In some cases it may be desirable to disable interrupts globally but
- enable channel interrupts. This would allow the global interrupt
- status register to be used to determine which AIOPs need service.
- */
- void sEnInterrupts(CHANNEL_T *ChP,Word_t Flags)
- {
- Byte_t Mask; /* Interrupt Mask Register */
- ChP->RxControl[2] |=
- ((Byte_t)Flags & (RXINT_EN | SRCINT_EN | MCINT_EN));
- sOutDW(ChP->IndexAddr,*(DWord_t *)&ChP->RxControl[0]);
- ChP->TxControl[2] |= ((Byte_t)Flags & TXINT_EN);
- sOutDW(ChP->IndexAddr,*(DWord_t *)&ChP->TxControl[0]);
- if(Flags & CHANINT_EN)
- {
- Mask = sInB(ChP->IntMask) | sBitMapSetTbl[ChP->ChanNum];
- sOutB(ChP->IntMask,Mask);
- }
- }
- /***************************************************************************
- Function: sDisInterrupts
- Purpose: Disable one or more interrupts for a channel
- Call: sDisInterrupts(ChP,Flags)
- CHANNEL_T *ChP; Ptr to channel structure
- Word_t Flags: Interrupt flags, can be any combination
- of the following flags:
- TXINT_EN: Interrupt on Tx FIFO empty
- RXINT_EN: Interrupt on Rx FIFO at trigger level (see
- sSetRxTrigger())
- SRCINT_EN: Interrupt on SRC (Special Rx Condition)
- MCINT_EN: Interrupt on modem input change
- CHANINT_EN: Disable channel interrupt signal to the
- AIOP's Interrupt Channel Register.
- Return: void
- Comments: If an interrupt flag is set in Flags, that interrupt will be
- disabled. If an interrupt flag is not set in Flags, that
- interrupt will not be changed. Interrupts can be enabled with
- function sEnInterrupts().
- This function clears the appropriate bit for the channel in the AIOP's
- Interrupt Mask Register if the CHANINT_EN flag is set. This blocks
- this channel's bit from being set in the AIOP's Interrupt Channel
- Register.
- */
- void sDisInterrupts(CHANNEL_T *ChP,Word_t Flags)
- {
- Byte_t Mask; /* Interrupt Mask Register */
- ChP->RxControl[2] &=
- ~((Byte_t)Flags & (RXINT_EN | SRCINT_EN | MCINT_EN));
- sOutDW(ChP->IndexAddr,*(DWord_t *)&ChP->RxControl[0]);
- ChP->TxControl[2] &= ~((Byte_t)Flags & TXINT_EN);
- sOutDW(ChP->IndexAddr,*(DWord_t *)&ChP->TxControl[0]);
- if(Flags & CHANINT_EN)
- {
- Mask = sInB(ChP->IntMask) & sBitMapClrTbl[ChP->ChanNum];
- sOutB(ChP->IntMask,Mask);
- }
- }