patch-1.3.69 linux/drivers/isdn/isdn_tty.c
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- Lines: 2069
- Date:
Mon Feb 26 12:31:19 1996
- Orig file:
v1.3.68/linux/drivers/isdn/isdn_tty.c
- Orig date:
Thu Jan 1 02:00:00 1970
diff -u --recursive --new-file v1.3.68/linux/drivers/isdn/isdn_tty.c linux/drivers/isdn/isdn_tty.c
@@ -0,0 +1,2068 @@
+/* $Id: isdn_tty.c,v 1.3 1996/02/11 02:12:32 fritz Exp fritz $
+ *
+ * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
+ *
+ * Copyright 1994,95,96 by Fritz Elfert (fritz@wuemaus.franken.de)
+ * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
+ *
+ * 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, 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.
+ *
+ * $Log: isdn_tty.c,v $
+ * Revision 1.3 1996/02/11 02:12:32 fritz
+ * Bugfixes according to similar fixes in standard serial.c of kernel.
+ *
+ * Revision 1.2 1996/01/22 05:12:25 fritz
+ * replaced my_atoi by simple_strtoul
+ *
+ * Revision 1.1 1996/01/09 04:13:18 fritz
+ * Initial revision
+ *
+ */
+
+#define __NO_VERSION__
+#include <linux/module.h>
+#include <linux/isdn.h>
+#include "isdn_common.h"
+#include "isdn_tty.h"
+
+/* Prototypes */
+
+static int isdn_tty_edit_at(const char *, int, modem_info *, int);
+static void isdn_tty_check_esc(const u_char *, u_char, int, int *, int *, int);
+static void isdn_tty_modem_reset_regs(atemu *, int);
+
+/* Leave this unchanged unless you know what you do! */
+#define MODEM_PARANOIA_CHECK
+#define MODEM_DO_RESTART
+
+static char *isdn_ttyname_ttyI = "ttyI";
+static char *isdn_ttyname_cui = "cui";
+char *isdn_tty_revision = "$Revision: 1.3 $";
+
+int isdn_tty_try_read(int i, u_char * buf, int len)
+{
+ int c;
+ struct tty_struct *tty;
+
+ if (i < 0)
+ return 0;
+ if (dev->mdm.online[i]) {
+ if ((tty = dev->mdm.info[i].tty)) {
+ if (dev->mdm.info[i].MCR & UART_MCR_RTS) {
+ c = TTY_FLIPBUF_SIZE - tty->flip.count - 1;
+ if (c >= len) {
+ if (len > 1) {
+ memcpy(tty->flip.char_buf_ptr, buf, len);
+ tty->flip.count += len;
+ memset(tty->flip.flag_buf_ptr, 0, len);
+ if (dev->mdm.atmodem[i].mdmreg[12] & 128)
+ tty->flip.flag_buf_ptr[len - 1] = 0xff;
+ tty->flip.flag_buf_ptr += len;
+ tty->flip.char_buf_ptr += len;
+ } else
+ tty_insert_flip_char(tty, buf[0], 0);
+ queue_task_irq_off(&tty->flip.tqueue, &tq_timer);
+ return 1;
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+void isdn_tty_readmodem(void)
+{
+ int resched = 0;
+ int midx;
+ int i;
+ int c;
+ int r;
+ ulong flags;
+ struct tty_struct *tty;
+ modem_info *info;
+
+ for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
+ if ((midx = dev->m_idx[i]) >= 0)
+ if (dev->mdm.online[midx]) {
+ save_flags(flags);
+ cli();
+ r = 0;
+ info = &dev->mdm.info[midx];
+ if ((tty = info->tty)) {
+ if (info->MCR & UART_MCR_RTS) {
+ c = TTY_FLIPBUF_SIZE - tty->flip.count - 1;
+ if (c > 0) {
+ r = isdn_readbchan(info->isdn_driver, info->isdn_channel,
+ tty->flip.char_buf_ptr,
+ tty->flip.flag_buf_ptr, c, 0);
+ if (!(dev->mdm.atmodem[midx].mdmreg[12] & 128))
+ memset(tty->flip.flag_buf_ptr, 0, r);
+ tty->flip.count += r;
+ tty->flip.flag_buf_ptr += r;
+ tty->flip.char_buf_ptr += r;
+ if (r)
+ queue_task_irq_off(&tty->flip.tqueue, &tq_timer);
+ }
+ } else
+ r = 1;
+ } else
+ r = 1;
+ restore_flags(flags);
+ if (r) {
+ dev->mdm.rcvsched[midx] = 0;
+ resched = 1;
+ } else
+ dev->mdm.rcvsched[midx] = 1;
+ }
+ }
+ if (!resched)
+ isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
+}
+
+/************************************************************
+ *
+ * Modem-functions
+ *
+ * mostly "stolen" from original Linux-serial.c and friends.
+ *
+ ************************************************************/
+
+static void isdn_tty_dial(char *n, modem_info * info, atemu * m)
+{
+ isdn_ctrl cmd;
+ ulong flags;
+ int i;
+
+ save_flags(flags);
+ cli();
+ i = isdn_get_free_channel(ISDN_USAGE_MODEM, m->mdmreg[14], m->mdmreg[15], -1, -1);
+ if (i < 0) {
+ restore_flags(flags);
+ isdn_tty_modem_result(6, info);
+ } else {
+ if (strlen(m->msn)) {
+ info->isdn_driver = dev->drvmap[i];
+ info->isdn_channel = dev->chanmap[i];
+ info->drv_index = i;
+ dev->m_idx[i] = info->line;
+ dev->usage[i] |= ISDN_USAGE_OUTGOING;
+ isdn_info_update();
+ restore_flags(flags);
+ cmd.driver = info->isdn_driver;
+ cmd.arg = info->isdn_channel;
+ cmd.command = ISDN_CMD_CLREAZ;
+ dev->drv[info->isdn_driver]->interface->command(&cmd);
+ strcpy(cmd.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
+ cmd.driver = info->isdn_driver;
+ cmd.command = ISDN_CMD_SETEAZ;
+ dev->drv[info->isdn_driver]->interface->command(&cmd);
+ cmd.driver = info->isdn_driver;
+ cmd.command = ISDN_CMD_SETL2;
+ cmd.arg = info->isdn_channel + (m->mdmreg[14] << 8);
+ dev->drv[info->isdn_driver]->interface->command(&cmd);
+ cmd.driver = info->isdn_driver;
+ cmd.command = ISDN_CMD_SETL3;
+ cmd.arg = info->isdn_channel + (m->mdmreg[15] << 8);
+ dev->drv[info->isdn_driver]->interface->command(&cmd);
+ cmd.driver = info->isdn_driver;
+ cmd.arg = info->isdn_channel;
+ sprintf(cmd.num, "%s,%s,%d,%d", n, isdn_map_eaz2msn(m->msn, info->isdn_driver),
+ m->mdmreg[18], m->mdmreg[19]);
+ cmd.command = ISDN_CMD_DIAL;
+ dev->mdm.dialing[info->line] = 1;
+ strcpy(dev->num[i], n);
+ isdn_info_update();
+ dev->drv[info->isdn_driver]->interface->command(&cmd);
+ } else
+ restore_flags(flags);
+ }
+}
+
+void isdn_tty_modem_hup(modem_info * info)
+{
+ isdn_ctrl cmd;
+
+ dev->mdm.rcvsched[info->line] = 0;
+ dev->mdm.online[info->line] = 0;
+ if (info->isdn_driver >= 0) {
+ cmd.driver = info->isdn_driver;
+ cmd.command = ISDN_CMD_HANGUP;
+ cmd.arg = info->isdn_channel;
+ dev->drv[info->isdn_driver]->interface->command(&cmd);
+ isdn_all_eaz(info->isdn_driver, info->isdn_channel);
+ isdn_free_channel(info->isdn_driver, info->isdn_channel, ISDN_USAGE_MODEM);
+ }
+ dev->m_idx[info->drv_index] = -1;
+ info->isdn_driver = -1;
+ info->isdn_channel = -1;
+ info->drv_index = -1;
+}
+
+static inline int isdn_tty_paranoia_check(modem_info * info, dev_t device, const char *routine)
+{
+#ifdef MODEM_PARANOIA_CHECK
+ if (!info) {
+ printk(KERN_WARNING "isdn: null info_struct for (%d, %d) in %s\n",
+ MAJOR(device), MINOR(device), routine);
+ return 1;
+ }
+ if (info->magic != ISDN_ASYNC_MAGIC) {
+ printk(KERN_WARNING "isdn: bad magic for modem struct (%d, %d) in %s\n",
+ MAJOR(device), MINOR(device), routine);
+ return 1;
+ }
+#endif
+ return 0;
+}
+
+/*
+ * This routine is called to set the UART divisor registers to match
+ * the specified baud rate for a serial port.
+ */
+static void isdn_tty_change_speed(modem_info * info)
+{
+ uint cflag, cval, fcr, quot;
+ int i;
+
+ if (!info->tty || !info->tty->termios)
+ return;
+ cflag = info->tty->termios->c_cflag;
+
+ quot = i = cflag & CBAUD;
+ if (i & CBAUDEX) {
+ i &= ~CBAUDEX;
+ if (i < 1 || i > 2)
+ info->tty->termios->c_cflag &= ~CBAUDEX;
+ else
+ i += 15;
+ }
+ if (quot) {
+ info->MCR |= UART_MCR_DTR;
+ } else {
+ info->MCR &= ~UART_MCR_DTR;
+ isdn_tty_modem_reset_regs(&dev->mdm.atmodem[info->line], 0);
+ if (dev->mdm.online[info->line]) {
+#ifdef ISDN_DEBUG_MODEM_HUP
+ printk(KERN_DEBUG "Mhup in changespeed\n");
+#endif
+ isdn_tty_modem_hup(info);
+ isdn_tty_modem_result(3, info);
+ }
+ return;
+ }
+ /* byte size and parity */
+ cval = cflag & (CSIZE | CSTOPB);
+ cval >>= 4;
+ if (cflag & PARENB)
+ cval |= UART_LCR_PARITY;
+ if (!(cflag & PARODD))
+ cval |= UART_LCR_EPAR;
+ fcr = 0;
+
+ /* CTS flow control flag and modem status interrupts */
+ if (cflag & CRTSCTS) {
+ info->flags |= ISDN_ASYNC_CTS_FLOW;
+ } else
+ info->flags &= ~ISDN_ASYNC_CTS_FLOW;
+ if (cflag & CLOCAL)
+ info->flags &= ~ISDN_ASYNC_CHECK_CD;
+ else {
+ info->flags |= ISDN_ASYNC_CHECK_CD;
+ }
+}
+
+static int isdn_tty_startup(modem_info * info)
+{
+ ulong flags;
+
+ if (info->flags & ISDN_ASYNC_INITIALIZED)
+ return 0;
+ if (!info->type) {
+ if (info->tty)
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+ return 0;
+ }
+ save_flags(flags);
+ cli();
+
+#ifdef ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
+#endif
+ /*
+ * Now, initialize the UART
+ */
+ info->MCR = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
+ if (info->tty)
+ clear_bit(TTY_IO_ERROR, &info->tty->flags);
+ /*
+ * and set the speed of the serial port
+ */
+ isdn_tty_change_speed(info);
+
+ info->flags |= ISDN_ASYNC_INITIALIZED;
+ dev->mdm.msr[info->line] |= UART_MSR_DSR;
+#if FUTURE
+ info->send_outstanding = 0;
+#endif
+ restore_flags(flags);
+ return 0;
+}
+
+/*
+ * This routine will shutdown a serial port; interrupts are disabled, and
+ * DTR is dropped if the hangup on close termio flag is on.
+ */
+static void isdn_tty_shutdown(modem_info * info)
+{
+ ulong flags;
+
+ if (!(info->flags & ISDN_ASYNC_INITIALIZED))
+ return;
+#ifdef ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
+#endif
+ save_flags(flags);
+ cli(); /* Disable interrupts */
+ if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
+ info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
+ isdn_tty_modem_reset_regs(&dev->mdm.atmodem[info->line], 0);
+ if (dev->mdm.online[info->line]) {
+#ifdef ISDN_DEBUG_MODEM_HUP
+ printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
+#endif
+ isdn_tty_modem_hup(info);
+ }
+ }
+ if (info->tty)
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+
+ info->flags &= ~ISDN_ASYNC_INITIALIZED;
+ restore_flags(flags);
+}
+
+static int isdn_tty_write(struct tty_struct *tty, int from_user, const u_char * buf, int count)
+{
+ int c, total = 0;
+ modem_info *info = (modem_info *) tty->driver_data;
+ ulong flags;
+ int i;
+
+ if (isdn_tty_paranoia_check(info, tty->device, "isdn_tty_write"))
+ return 0;
+ if (!tty)
+ return 0;
+ save_flags(flags);
+ cli();
+ while (1) {
+ c = MIN(count, info->xmit_size - info->xmit_count - 1);
+ if (info->isdn_driver >= 0) {
+#if 0
+ if (info->isdn_driver != 0) {
+ printk(KERN_DEBUG "FIDO: Zwei HW-Treiber geladen? Ansonsten ist was faul.\n");
+ break;
+ }
+ int drvidx = info->isdn_driver;
+ driver *driv = dev->drv[drvidx];
+ i = driv->maxbufsize;
+#else
+ i = dev->drv[info->isdn_driver]->maxbufsize;
+#endif
+ c = MIN(c, i);
+ }
+ if (c <= 0)
+ break;
+ i = info->line;
+ if (dev->mdm.online[i]) {
+ isdn_tty_check_esc(buf, dev->mdm.atmodem[i].mdmreg[2], c,
+ &(dev->mdm.atmodem[i].pluscount),
+ &(dev->mdm.atmodem[i].lastplus), from_user);
+ if (from_user)
+ memcpy_fromfs(&(info->xmit_buf[info->xmit_count]), buf, c);
+ else
+ memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
+ info->xmit_count += c;
+ if (dev->mdm.atmodem[i].mdmreg[13] & 1) {
+ char *bufptr;
+ int buflen;
+#if 0
+ printk(KERN_DEBUG "WB1: %d\n", info->xmit_count);
+#endif
+ bufptr = info->xmit_buf;
+ buflen = info->xmit_count;
+ if (dev->mdm.atmodem[i].mdmreg[13] & 2) {
+ /* Add T.70 simplyfied header */
+
+#ifdef ISDN_DEBUG_MODEM_DUMP
+ isdn_dumppkt("T70pack1:", bufptr, buflen, 40);
+#endif
+ bufptr -= 4;
+ buflen += 4;
+ memcpy(bufptr, "\1\0\1\0", 4);
+#ifdef ISDN_DEBUG_MODEM_DUMP
+ isdn_dumppkt("T70pack2:", bufptr, buflen, 40);
+#endif
+ }
+ if (dev->drv[info->isdn_driver]->interface->
+ writebuf(info->isdn_driver, info->isdn_channel, bufptr, buflen, 0) > 0) {
+ info->xmit_count = 0;
+ info->xmit_size = dev->mdm.atmodem[i].mdmreg[16] * 16;
+#if FUTURE
+ info->send_outstanding++;
+ dev->mdm.msr[i] &= ~UART_MSR_CTS;
+#endif
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup) (tty);
+ wake_up_interruptible(&tty->write_wait);
+ }
+ }
+ } else {
+ if (dev->mdm.dialing[i]) {
+ dev->mdm.dialing[i] = 0;
+#ifdef ISDN_DEBUG_MODEM_HUP
+ printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
+#endif
+ isdn_tty_modem_hup(info);
+ isdn_tty_modem_result(3, info);
+ } else
+ c = isdn_tty_edit_at(buf, c, info, from_user);
+ }
+ buf += c;
+ count -= c;
+ total += c;
+ }
+ if (info->xmit_count)
+ isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
+ restore_flags(flags);
+ return total;
+}
+
+static int isdn_tty_write_room(struct tty_struct *tty)
+{
+ modem_info *info = (modem_info *) tty->driver_data;
+ int ret;
+
+ if (isdn_tty_paranoia_check(info, tty->device, "isdn_tty_write_room"))
+ return 0;
+ if (!dev->mdm.online[info->line])
+ return info->xmit_size - 1;
+ ret = info->xmit_size - info->xmit_count - 1;
+ return (ret < 0) ? 0 : ret;
+}
+
+static int isdn_tty_chars_in_buffer(struct tty_struct *tty)
+{
+ modem_info *info = (modem_info *) tty->driver_data;
+
+ if (isdn_tty_paranoia_check(info, tty->device, "isdn_tty_chars_in_buffer"))
+ return 0;
+ if (!dev->mdm.online[info->line])
+ return 0;
+ return (info->xmit_count);
+}
+
+static void isdn_tty_flush_buffer(struct tty_struct *tty)
+{
+ modem_info *info = (modem_info *) tty->driver_data;
+ uint flags;
+
+ if (isdn_tty_paranoia_check(info, tty->device, "isdn_tty_flush_buffer"))
+ return;
+ save_flags(flags);
+ cli();
+ info->xmit_count = 0;
+ restore_flags(flags);
+ wake_up_interruptible(&tty->write_wait);
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup) (tty);
+}
+
+static void isdn_tty_flush_chars(struct tty_struct *tty)
+{
+ modem_info *info = (modem_info *) tty->driver_data;
+
+ if (isdn_tty_paranoia_check(info, tty->device, "isdn_tty_flush_chars"))
+ return;
+ if (info->xmit_count > 0)
+ isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
+}
+
+/*
+ * ------------------------------------------------------------
+ * isdn_tty_throttle()
+ *
+ * This routine is called by the upper-layer tty layer to signal that
+ * incoming characters should be throttled.
+ * ------------------------------------------------------------
+ */
+static void isdn_tty_throttle(struct tty_struct *tty)
+{
+ modem_info *info = (modem_info *) tty->driver_data;
+
+ if (isdn_tty_paranoia_check(info, tty->device, "isdn_tty_throttle"))
+ return;
+ if (I_IXOFF(tty))
+ info->x_char = STOP_CHAR(tty);
+ info->MCR &= ~UART_MCR_RTS;
+}
+
+static void isdn_tty_unthrottle(struct tty_struct *tty)
+{
+ modem_info *info = (modem_info *) tty->driver_data;
+
+ if (isdn_tty_paranoia_check(info, tty->device, "isdn_tty_unthrottle"))
+ return;
+ if (I_IXOFF(tty)) {
+ if (info->x_char)
+ info->x_char = 0;
+ else
+ info->x_char = START_CHAR(tty);
+ }
+ info->MCR |= UART_MCR_RTS;
+}
+
+/*
+ * ------------------------------------------------------------
+ * isdn_tty_ioctl() and friends
+ * ------------------------------------------------------------
+ */
+
+/*
+ * isdn_tty_get_lsr_info - get line status register info
+ *
+ * Purpose: Let user call ioctl() to get info when the UART physically
+ * is emptied. On bus types like RS485, the transmitter must
+ * release the bus after transmitting. This must be done when
+ * the transmit shift register is empty, not be done when the
+ * transmit holding register is empty. This functionality
+ * allows RS485 driver to be written in user space.
+ */
+static int isdn_tty_get_lsr_info(modem_info * info, uint * value)
+{
+ u_char status;
+ uint result;
+ ulong flags;
+
+ save_flags(flags);
+ cli();
+ status = dev->mdm.msr[info->line];
+ restore_flags(flags);
+ result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
+ put_fs_long(result, (ulong *) value);
+ return 0;
+}
+
+
+static int isdn_tty_get_modem_info(modem_info * info, uint * value)
+{
+ u_char control, status;
+ uint result;
+ ulong flags;
+
+ control = info->MCR;
+ save_flags(flags);
+ cli();
+ status = dev->mdm.msr[info->line];
+ restore_flags(flags);
+ result = ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
+ | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
+ | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
+ | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
+ | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
+ | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
+ put_fs_long(result, (ulong *) value);
+ return 0;
+}
+
+static int isdn_tty_set_modem_info(modem_info * info, uint cmd, uint * value)
+{
+ uint arg = get_fs_long((ulong *) value);
+
+ switch (cmd) {
+ case TIOCMBIS:
+ if (arg & TIOCM_RTS) {
+ info->MCR |= UART_MCR_RTS;
+ }
+ if (arg & TIOCM_DTR) {
+ info->MCR |= UART_MCR_DTR;
+ }
+ break;
+ case TIOCMBIC:
+ if (arg & TIOCM_RTS) {
+ info->MCR &= ~UART_MCR_RTS;
+ }
+ if (arg & TIOCM_DTR) {
+ info->MCR &= ~UART_MCR_DTR;
+ isdn_tty_modem_reset_regs(&dev->mdm.atmodem[info->line], 0);
+ if (dev->mdm.online[info->line]) {
+#ifdef ISDN_DEBUG_MODEM_HUP
+ printk(KERN_DEBUG "Mhup in TIOCMBIC\n");
+#endif
+ isdn_tty_modem_hup(info);
+ isdn_tty_modem_result(3, info);
+ }
+ }
+ break;
+ case TIOCMSET:
+ info->MCR = ((info->MCR & ~(UART_MCR_RTS | UART_MCR_DTR))
+ | ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0)
+ | ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0));
+ if (!(info->MCR & UART_MCR_DTR)) {
+ isdn_tty_modem_reset_regs(&dev->mdm.atmodem[info->line], 0);
+ if (dev->mdm.online[info->line]) {
+#ifdef ISDN_DEBUG_MODEM_HUP
+ printk(KERN_DEBUG "Mhup in TIOCMSET\n");
+#endif
+ isdn_tty_modem_hup(info);
+ isdn_tty_modem_result(3, info);
+ }
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
+ uint cmd, ulong arg)
+{
+ modem_info *info = (modem_info *) tty->driver_data;
+ int error;
+ int retval;
+
+ if (isdn_tty_paranoia_check(info, tty->device, "isdn_tty_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);
+ return 0;
+ case TCSBRKP: /* support for POSIX tcsendbreak() */
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+ tty_wait_until_sent(tty, 0);
+ return 0;
+ case TIOCGSOFTCAR:
+ error = verify_area(VERIFY_WRITE, (void *) arg, sizeof(long));
+ if (error)
+ return error;
+ put_fs_long(C_CLOCAL(tty) ? 1 : 0, (ulong *) arg);
+ return 0;
+ case TIOCSSOFTCAR:
+ arg = get_fs_long((ulong *) arg);
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (arg ? CLOCAL : 0));
+ return 0;
+ case TIOCMGET:
+ error = verify_area(VERIFY_WRITE, (void *) arg, sizeof(uint));
+ if (error)
+ return error;
+ return isdn_tty_get_modem_info(info, (uint *) arg);
+ case TIOCMBIS:
+ case TIOCMBIC:
+ case TIOCMSET:
+ return isdn_tty_set_modem_info(info, cmd, (uint *) arg);
+ case TIOCSERGETLSR: /* Get line status register */
+ error = verify_area(VERIFY_WRITE, (void *) arg, sizeof(uint));
+ if (error)
+ return error;
+ else
+ return isdn_tty_get_lsr_info(info, (uint *) arg);
+
+ case TIOCGSERIAL:
+ return -ENOIOCTLCMD;
+#if 0
+ error = verify_area(VERIFY_WRITE, (void *) arg,
+ sizeof(struct serial_struct));
+ if (error)
+ return error;
+ return get_serial_info(info,
+ (struct serial_struct *) arg);
+#endif
+ case TIOCSSERIAL:
+ return -ENOIOCTLCMD;
+#if 0
+ return set_serial_info(info,
+ (struct serial_struct *) arg);
+#endif
+ case TIOCSERCONFIG:
+ return -ENOIOCTLCMD;
+#if 0
+ return do_autoconfig(info);
+#endif
+
+ case TIOCSERGWILD:
+ return -ENOIOCTLCMD;
+#if 0
+ error = verify_area(VERIFY_WRITE, (void *) arg,
+ sizeof(int));
+ if (error)
+ return error;
+ put_fs_long(modem_wild_int_mask, (ulong *) arg);
+ return 0;
+#endif
+ case TIOCSERSWILD:
+ return -ENOIOCTLCMD;
+#if 0
+ if (!suser())
+ return -EPERM;
+ modem_wild_int_mask = get_fs_long((ulong *) arg);
+ if (modem_wild_int_mask < 0)
+ modem_wild_int_mask = check_wild_interrupts(0);
+ return 0;
+#endif
+ case TIOCSERGSTRUCT:
+ return -ENOIOCTLCMD;
+#if 0
+ error = verify_area(VERIFY_WRITE, (void *) arg,
+ sizeof(modem_info));
+ if (error)
+ return error;
+ memcpy_tofs((modem_info *) arg,
+ info, sizeof(modem_info));
+ return 0;
+#endif
+ default:
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "unsupp. ioctl 0x%08x on ttyi%d\n", cmd, info->line);
+#endif
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+static void isdn_tty_set_termios(struct tty_struct *tty, struct termios *old_termios)
+{
+ modem_info *info = (modem_info *) tty->driver_data;
+
+ if (tty->termios->c_cflag == old_termios->c_cflag)
+ return;
+ isdn_tty_change_speed(info);
+ if ((old_termios->c_cflag & CRTSCTS) &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ }
+}
+
+/*
+ * ------------------------------------------------------------
+ * isdn_tty_open() and friends
+ * ------------------------------------------------------------
+ */
+static int isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
+{
+ struct wait_queue wait = {current, NULL};
+ int do_clocal = 0;
+ unsigned long flags;
+ int retval;
+
+ /*
+ * If the device is in the middle of being closed, then block
+ * until it's done, and then try again.
+ */
+ if (tty_hung_up_p(filp) ||
+ (info->flags & ISDN_ASYNC_CLOSING)) {
+ if (info->flags & ISDN_ASYNC_CLOSING)
+ interruptible_sleep_on(&info->close_wait);
+#ifdef MODEM_DO_RESTART
+ if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
+ return -EAGAIN;
+ else
+ return -ERESTARTSYS;
+#else
+ return -EAGAIN;
+#endif
+ }
+ /*
+ * If this is a callout device, then just make sure the normal
+ * device isn't being used.
+ */
+ if (tty->driver.subtype == ISDN_SERIAL_TYPE_CALLOUT) {
+ if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
+ return -EBUSY;
+ if ((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
+ (info->flags & ISDN_ASYNC_SESSION_LOCKOUT) &&
+ (info->session != current->session))
+ return -EBUSY;
+ if ((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
+ (info->flags & ISDN_ASYNC_PGRP_LOCKOUT) &&
+ (info->pgrp != current->pgrp))
+ return -EBUSY;
+ info->flags |= ISDN_ASYNC_CALLOUT_ACTIVE;
+ return 0;
+ }
+ /*
+ * If non-blocking mode is set, then make the check up front
+ * and then exit.
+ */
+ if (filp->f_flags & O_NONBLOCK) {
+ if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
+ return -EBUSY;
+ info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
+ return 0;
+ }
+ if (info->flags & ISDN_ASYNC_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
+ * isdn_tty_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 ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
+ info->line, info->count);
+#endif
+ save_flags(flags);
+ cli();
+ if (!(tty_hung_up_p(filp)))
+ info->count--;
+ restore_flags(flags);
+ info->blocked_open++;
+ while (1) {
+ current->state = TASK_INTERRUPTIBLE;
+ if (tty_hung_up_p(filp) ||
+ !(info->flags & ISDN_ASYNC_INITIALIZED)) {
+#ifdef MODEM_DO_RESTART
+ if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
+ retval = -EAGAIN;
+ else
+ retval = -ERESTARTSYS;
+#else
+ retval = -EAGAIN;
+#endif
+ break;
+ }
+ if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
+ !(info->flags & ISDN_ASYNC_CLOSING) &&
+ (do_clocal || (
+ dev->mdm.msr[info->line] &
+ UART_MSR_DCD))) {
+ break;
+ }
+ if (current->signal & ~current->blocked) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+#ifdef ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
+ info->line, info->count);
+#endif
+ schedule();
+ }
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&info->open_wait, &wait);
+ if (!tty_hung_up_p(filp))
+ info->count++;
+ info->blocked_open--;
+#ifdef ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
+ info->line, info->count);
+#endif
+ if (retval)
+ return retval;
+ info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
+ return 0;
+}
+
+/*
+ * This routine is called whenever a serial port is opened. It
+ * enables interrupts for a serial port, linking in its async structure into
+ * the IRQ chain. It also performs the serial-specific
+ * initialization for the tty structure.
+ */
+static int isdn_tty_open(struct tty_struct *tty, struct file *filp)
+{
+ modem_info *info;
+ int retval, line;
+
+ line = MINOR(tty->device) - tty->driver.minor_start;
+ if (line < 0 || line > ISDN_MAX_CHANNELS)
+ return -ENODEV;
+ info = &dev->mdm.info[line];
+ if (isdn_tty_paranoia_check(info, tty->device, "isdn_tty_open"))
+ return -ENODEV;
+#ifdef ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "isdn_tty_open %s%d, count = %d\n", tty->driver.name,
+ info->line, info->count);
+#endif
+ info->count++;
+ tty->driver_data = info;
+ info->tty = tty;
+ /*
+ * Start up serial port
+ */
+ retval = isdn_tty_startup(info);
+ if (retval) {
+#ifdef ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "isdn_tty_open return after startup\n");
+#endif
+ return retval;
+ }
+ retval = isdn_tty_block_til_ready(tty, filp, info);
+ if (retval) {
+#ifdef ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
+#endif
+ return retval;
+ }
+ if ((info->count == 1) && (info->flags & ISDN_ASYNC_SPLIT_TERMIOS)) {
+ if (tty->driver.subtype == ISDN_SERIAL_TYPE_NORMAL)
+ *tty->termios = info->normal_termios;
+ else
+ *tty->termios = info->callout_termios;
+ isdn_tty_change_speed(info);
+ }
+ info->session = current->session;
+ info->pgrp = current->pgrp;
+#ifdef ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
+#endif
+ dev->modempoll++;
+#ifdef ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "isdn_tty_open normal exit\n");
+#endif
+ return 0;
+}
+
+static void isdn_tty_close(struct tty_struct *tty, struct file *filp)
+{
+ modem_info *info = (modem_info *) tty->driver_data;
+ ulong flags;
+ ulong timeout;
+
+ if (!info || isdn_tty_paranoia_check(info, tty->device, "isdn_tty_close"))
+ return;
+ save_flags(flags);
+ cli();
+ if (tty_hung_up_p(filp)) {
+ restore_flags(flags);
+#ifdef ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
+#endif
+ return;
+ }
+ dev->modempoll--;
+ 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(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
+ "info->count is %d\n", info->count);
+ info->count = 1;
+ }
+ if (--info->count < 0) {
+ printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
+ info->line, info->count);
+ info->count = 0;
+ }
+ if (info->count) {
+ restore_flags(flags);
+#ifdef ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
+#endif
+ return;
+ }
+ info->flags |= ISDN_ASYNC_CLOSING;
+ /*
+ * Save the termios structure, since this port may have
+ * separate termios for callout and dialin.
+ */
+ if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
+ info->normal_termios = *tty->termios;
+ if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
+ info->callout_termios = *tty->termios;
+
+ tty->closing = 1;
+
+ /*
+ * 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.
+ */
+ if (info->flags & ISDN_ASYNC_INITIALIZED) {
+ tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
+ /*
+ * 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 (!(dev->mdm.mlr[info->line]
+ & UART_LSR_TEMT)) {
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + 20;
+ schedule();
+ if (jiffies > timeout)
+ break;
+ }
+ }
+ isdn_tty_shutdown(info);
+ if (tty->driver.flush_buffer)
+ tty->driver.flush_buffer(tty);
+ if (tty->ldisc.flush_buffer)
+ tty->ldisc.flush_buffer(tty);
+ info->tty = 0;
+ tty->closing = 0;
+#if 00
+ if (tty->ldisc.num != ldiscs[N_TTY].num) {
+ if (tty->ldisc.close)
+ (tty->ldisc.close) (tty);
+ tty->ldisc = ldiscs[N_TTY];
+ tty->termios->c_line = N_TTY;
+ if (tty->ldisc.open)
+ (tty->ldisc.open) (tty);
+ }
+#endif
+ if (info->blocked_open) {
+ if (info->close_delay) {
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + info->close_delay;
+ schedule();
+ }
+ wake_up_interruptible(&info->open_wait);
+ }
+ info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE |
+ ISDN_ASYNC_CLOSING);
+ wake_up_interruptible(&info->close_wait);
+ restore_flags(flags);
+#ifdef ISDN_DEBUG_MODEM_OPEN
+ printk(KERN_DEBUG "isdn_tty_close normal exit\n");
+#endif
+}
+
+/*
+ * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+static void isdn_tty_hangup(struct tty_struct *tty)
+{
+ modem_info *info = (modem_info *) tty->driver_data;
+
+ if (isdn_tty_paranoia_check(info, tty->device, "isdn_tty_hangup"))
+ return;
+ isdn_tty_shutdown(info);
+ info->count = 0;
+ info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
+ info->tty = 0;
+ wake_up_interruptible(&info->open_wait);
+}
+
+static void isdn_tty_reset_profile(atemu * m)
+{
+ m->profile[0] = 0;
+ m->profile[1] = 0;
+ m->profile[2] = 43;
+ m->profile[3] = 13;
+ m->profile[4] = 10;
+ m->profile[5] = 8;
+ m->profile[6] = 3;
+ m->profile[7] = 60;
+ m->profile[8] = 2;
+ m->profile[9] = 6;
+ m->profile[10] = 7;
+ m->profile[11] = 70;
+ m->profile[12] = 0x45;
+ m->profile[13] = 0;
+ m->profile[14] = ISDN_PROTO_L2_X75I;
+ m->profile[15] = ISDN_PROTO_L3_TRANS;
+ m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
+ m->profile[17] = ISDN_MODEM_WINSIZE;
+ m->profile[18] = 7;
+ m->profile[19] = 0;
+ m->pmsn[0] = '\0';
+}
+
+static void isdn_tty_modem_reset_regs(atemu * m, int force)
+{
+ if ((m->mdmreg[12] & 32) || force) {
+ memcpy(m->mdmreg, m->profile, ISDN_MODEM_ANZREG);
+ memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
+ }
+ m->mdmcmdl = 0;
+}
+
+static void modem_write_profile(atemu * m)
+{
+ memcpy(m->profile, m->mdmreg, ISDN_MODEM_ANZREG);
+ memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
+ if (dev->profd)
+ send_sig(SIGIO, dev->profd, 1);
+}
+
+int isdn_tty_modem_init(void)
+{
+ modem *m;
+ int i;
+ modem_info *info;
+
+ m = &dev->mdm;
+ for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
+ isdn_tty_reset_profile(&(m->atmodem[i]));
+ isdn_tty_modem_reset_regs(&(m->atmodem[i]), 1);
+ }
+ memset(&m->tty_modem, 0, sizeof(struct tty_driver));
+ m->tty_modem.magic = TTY_DRIVER_MAGIC;
+ m->tty_modem.name = isdn_ttyname_ttyI;
+ m->tty_modem.major = ISDN_TTY_MAJOR;
+ m->tty_modem.minor_start = 0;
+ m->tty_modem.num = ISDN_MAX_CHANNELS;
+ m->tty_modem.type = TTY_DRIVER_TYPE_SERIAL;
+ m->tty_modem.subtype = ISDN_SERIAL_TYPE_NORMAL;
+ m->tty_modem.init_termios = tty_std_termios;
+ m->tty_modem.init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ m->tty_modem.flags = TTY_DRIVER_REAL_RAW;
+ m->tty_modem.refcount = &m->refcount;
+ m->tty_modem.table = m->modem_table;
+ m->tty_modem.termios = m->modem_termios;
+ m->tty_modem.termios_locked = m->modem_termios_locked;
+ m->tty_modem.open = isdn_tty_open;
+ m->tty_modem.close = isdn_tty_close;
+ m->tty_modem.write = isdn_tty_write;
+ m->tty_modem.put_char = NULL;
+ m->tty_modem.flush_chars = isdn_tty_flush_chars;
+ m->tty_modem.write_room = isdn_tty_write_room;
+ m->tty_modem.chars_in_buffer = isdn_tty_chars_in_buffer;
+ m->tty_modem.flush_buffer = isdn_tty_flush_buffer;
+ m->tty_modem.ioctl = isdn_tty_ioctl;
+ m->tty_modem.throttle = isdn_tty_throttle;
+ m->tty_modem.unthrottle = isdn_tty_unthrottle;
+ m->tty_modem.set_termios = isdn_tty_set_termios;
+ m->tty_modem.stop = NULL;
+ m->tty_modem.start = NULL;
+ m->tty_modem.hangup = isdn_tty_hangup;
+ /*
+ * The callout device is just like normal device except for
+ * major number and the subtype code.
+ */
+ m->cua_modem = m->tty_modem;
+ m->cua_modem.name = isdn_ttyname_cui;
+ m->cua_modem.major = ISDN_TTYAUX_MAJOR;
+ m->tty_modem.minor_start = 0;
+ m->cua_modem.subtype = ISDN_SERIAL_TYPE_CALLOUT;
+
+ if (tty_register_driver(&m->tty_modem)) {
+ printk(KERN_WARNING "isdn: Unable to register modem-device\n");
+ return -1;
+ }
+ if (tty_register_driver(&m->cua_modem)) {
+ printk(KERN_WARNING "Couldn't register modem-callout-device\n");
+ return -2;
+ }
+ for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
+ info = &(m->info[i]);
+ info->magic = ISDN_ASYNC_MAGIC;
+ info->line = i;
+ info->tty = 0;
+ info->close_delay = 50;
+ info->x_char = 0;
+ info->count = 0;
+ info->blocked_open = 0;
+ info->callout_termios = m->cua_modem.init_termios;
+ info->normal_termios = m->tty_modem.init_termios;
+ info->open_wait = 0;
+ info->close_wait = 0;
+ info->type = ISDN_PORT_16550A;
+ info->isdn_driver = -1;
+ info->isdn_channel = -1;
+ info->drv_index = -1;
+ info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
+ if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_SIZE + 5, GFP_KERNEL))) {
+ printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
+ return -3;
+ }
+ info->xmit_buf += 4; /* Make room for T.70 header */
+ }
+ return 0;
+}
+
+/*
+ * An incoming call-request has arrived.
+ * Search the tty-devices for an aproppriate device and bind
+ * it to the ISDN-Channel.
+ * Return Index to dev->mdm or -1 if none found.
+ */
+int isdn_tty_find_icall(int di, int ch, char *num)
+{
+ char *eaz;
+ int i;
+ int idx;
+ int si1;
+ int si2;
+ char *s;
+ char nr[31];
+ ulong flags;
+
+ save_flags(flags);
+ cli();
+ if (num[0] == ',') {
+ nr[0] = '0';
+ strncpy(&nr[1], num, 29);
+ printk(KERN_WARNING "isdn: Incoming call without OAD, assuming '0'\n");
+ } else
+ strncpy(nr, num, 30);
+ s = strtok(nr, ",");
+ s = strtok(NULL, ",");
+ if (!s) {
+ printk(KERN_WARNING "isdn: Incoming callinfo garbled, ignored: %s\n",
+ num);
+ restore_flags(flags);
+ return -1;
+ }
+ si1 = (int)simple_strtoul(s,NULL,10);
+ s = strtok(NULL, ",");
+ if (!s) {
+ printk(KERN_WARNING "isdn: Incoming callinfo garbled, ignored: %s\n",
+ num);
+ restore_flags(flags);
+ return -1;
+ }
+ si2 = (int)simple_strtoul(s,NULL,10);
+ eaz = strtok(NULL, ",");
+ if (!eaz) {
+ printk(KERN_WARNING "isdn: Incoming call without CPN, assuming '0'\n");
+ eaz = "0";
+ }
+#ifdef ISDN_DEBUG_MODEM_ICALL
+ printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
+#endif
+ for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
+#ifdef ISDN_DEBUG_MODEM_ICALL
+ printk(KERN_DEBUG "m_fi: i=%d msn=%s mmsn=%s mreg18=%d mreg19=%d\n", i,
+ dev->mdm.atmodem[i].msn, isdn_map_eaz2msn(dev->mdm.atmodem[i].msn, di),
+ dev->mdm.atmodem[i].mdmreg[18], dev->mdm.atmodem[i].mdmreg[19]);
+#endif
+ if ((!strcmp(isdn_map_eaz2msn(dev->mdm.atmodem[i].msn, di)
+ ,eaz)) && /* EAZ is matching */
+ (dev->mdm.atmodem[i].mdmreg[18] == si1) && /* SI1 is matching */
+ (dev->mdm.atmodem[i].mdmreg[19] == si2)) { /* SI2 is matching */
+ modem_info *info = &dev->mdm.info[i];
+ idx = isdn_dc2minor(di, ch);
+#ifdef ISDN_DEBUG_MODEM_ICALL
+ printk(KERN_DEBUG "m_fi: match1\n");
+ printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
+ info->flags, info->isdn_driver, info->isdn_channel,
+ dev->usage[idx]);
+#endif
+ if ((info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
+ (info->isdn_driver == -1) &&
+ (info->isdn_channel == -1) &&
+ (USG_NONE(dev->usage[idx]))) {
+ info->isdn_driver = di;
+ info->isdn_channel = ch;
+ info->drv_index = idx;
+ dev->m_idx[idx] = info->line;
+ dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
+ dev->usage[idx] |= ISDN_USAGE_MODEM;
+ strcpy(dev->num[idx], nr);
+ isdn_info_update();
+ restore_flags(flags);
+ printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
+ info->line);
+ return info->line;
+ }
+ }
+ }
+ printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
+ dev->drv[di]->reject_bus ? "rejected" : "ignored");
+ restore_flags(flags);
+ return -1;
+}
+
+/*********************************************************************
+ Modem-Emulator-Routines
+ *********************************************************************/
+
+#define cmdchar(c) ((c>' ')&&(c<=0x7f))
+
+/*
+ * Put a message from the AT-emulator into receive-buffer of tty,
+ * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
+ */
+static void isdn_tty_at_cout(char *msg, modem_info * info)
+{
+ struct tty_struct *tty;
+ atemu *m = &(dev->mdm.atmodem[info->line]);
+ char *p;
+ char c;
+ ulong flags;
+
+ if (!msg) {
+ printk(KERN_WARNING "isdn: Null-Message in isdn_tty_at_cout\n");
+ return;
+ }
+ save_flags(flags);
+ cli();
+ tty = info->tty;
+ for (p = msg; *p; p++) {
+ switch (*p) {
+ case '\r':
+ c = m->mdmreg[3];
+ break;
+ case '\n':
+ c = m->mdmreg[4];
+ break;
+ case '\b':
+ c = m->mdmreg[5];
+ break;
+ default:
+ c = *p;
+ }
+ if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
+ restore_flags(flags);
+ return;
+ }
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+ break;
+ tty_insert_flip_char(tty, c, 0);
+ }
+ restore_flags(flags);
+ queue_task(&tty->flip.tqueue, &tq_timer);
+}
+
+/*
+ * Perform ATH Hangup
+ */
+static void isdn_tty_on_hook(modem_info * info)
+{
+ if (info->isdn_channel >= 0) {
+#ifdef ISDN_DEBUG_MODEM_HUP
+ printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
+#endif
+ isdn_tty_modem_hup(info);
+ isdn_tty_modem_result(3, info);
+ }
+}
+
+static void isdn_tty_off_hook(void)
+{
+ printk(KERN_DEBUG "isdn_tty_off_hook\n");
+}
+
+#define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
+#define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
+
+/*
+ * Check Buffer for Modem-escape-sequence, activate timer-callback to
+ * isdn_tty_modem_escape() if sequence found.
+ *
+ * Parameters:
+ * p pointer to databuffer
+ * plus escape-character
+ * count length of buffer
+ * pluscount count of valid escape-characters so far
+ * lastplus timestamp of last character
+ */
+static void isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
+ int *lastplus, int from_user)
+{
+ char cbuf[3];
+
+ if (plus > 127)
+ return;
+ if (count > 3) {
+ p += count - 3;
+ count = 3;
+ *pluscount = 0;
+ }
+ if (from_user) {
+ memcpy_fromfs(cbuf, p, count);
+ p = cbuf;
+ }
+ while (count > 0) {
+ if (*(p++) == plus) {
+ if ((*pluscount)++) {
+ /* Time since last '+' > 0.5 sec. ? */
+ if ((jiffies - *lastplus) > PLUSWAIT1)
+ *pluscount = 1;
+ } else {
+ /* Time since last non-'+' < 1.5 sec. ? */
+ if ((jiffies - *lastplus) < PLUSWAIT2)
+ *pluscount = 0;
+ }
+ if ((*pluscount == 3) && (count = 1))
+ isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
+ if (*pluscount > 3)
+ *pluscount = 1;
+ } else
+ *pluscount = 0;
+ *lastplus = jiffies;
+ count--;
+ }
+}
+
+/*
+ * Return result of AT-emulator to tty-receive-buffer, depending on
+ * modem-register 12, bit 0 and 1.
+ * For CONNECT-messages also switch to online-mode.
+ * For RING-message handle auto-ATA if register 0 != 0
+ */
+void isdn_tty_modem_result(int code, modem_info * info)
+{
+ atemu *m = &dev->mdm.atmodem[info->line];
+ static char *msg[] =
+ {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
+ "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
+ "RINGING", "NO MSN/EAZ"};
+ ulong flags;
+ char s[4];
+
+ switch (code) {
+ case 2:
+ m->mdmreg[1]++; /* RING */
+ if (m->mdmreg[1] == m->mdmreg[0]) {
+ /* Accept incoming call */
+ isdn_ctrl cmd;
+ m->mdmreg[1] = 0;
+ dev->mdm.msr[info->line] &= ~UART_MSR_RI;
+ cmd.driver = info->isdn_driver;
+ cmd.arg = info->isdn_channel;
+ cmd.command = ISDN_CMD_ACCEPTD;
+ dev->drv[info->isdn_driver]->interface->command(&cmd);
+ }
+ break;
+ case 3:
+ /* NO CARRIER */
+ save_flags(flags);
+ cli();
+ dev->mdm.msr[info->line] &= ~(UART_MSR_DCD | UART_MSR_RI);
+ if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
+ restore_flags(flags);
+ return;
+ }
+ restore_flags(flags);
+ break;
+ case 1:
+ case 5:
+ dev->mdm.online[info->line] = 1;
+ break;
+ }
+ if (m->mdmreg[12] & 1) {
+ /* Show results */
+ isdn_tty_at_cout("\r\n", info);
+ if (m->mdmreg[12] & 2) {
+ /* Show numeric results */
+ sprintf(s, "%d", code);
+ isdn_tty_at_cout(s, info);
+ } else {
+ if (code == 2) {
+ isdn_tty_at_cout("CALLER NUMBER: ", info);
+ isdn_tty_at_cout(dev->num[info->drv_index], info);
+ isdn_tty_at_cout("\r\n", info);
+ }
+ isdn_tty_at_cout(msg[code], info);
+ if (code == 5) {
+ /* Append Protocol to CONNECT message */
+ isdn_tty_at_cout((m->mdmreg[14] != 3) ? "/X.75" : "/HDLC", info);
+ if (m->mdmreg[13] & 2)
+ isdn_tty_at_cout("/T.70", info);
+ }
+ }
+ isdn_tty_at_cout("\r\n", info);
+ }
+ if (code == 3) {
+ save_flags(flags);
+ cli();
+ if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
+ restore_flags(flags);
+ return;
+ }
+ if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
+ (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
+ (info->flags & ISDN_ASYNC_CALLOUT_NOHUP))))
+ tty_hangup(info->tty);
+ restore_flags(flags);
+ }
+}
+
+/*
+ * Display a modem-register-value.
+ */
+static void isdn_tty_show_profile(int ridx, modem_info * info)
+{
+ char v[6];
+
+ sprintf(v, "%d\r\n", dev->mdm.atmodem[info->line].mdmreg[ridx]);
+ isdn_tty_at_cout(v, info);
+}
+
+/*
+ * Get MSN-string from char-pointer, set pointer to end of number
+ */
+static void isdn_tty_get_msnstr(char *n, char **p)
+{
+ while ((*p[0] >= '0' && *p[0] <= '9') || (*p[0] == ','))
+ *n++ = *p[0]++;
+ *n = '\0';
+}
+
+/*
+ * Get phone-number from modem-commandbuffer
+ */
+static void isdn_tty_getdial(char *p, char *q)
+{
+ int first = 1;
+
+ while (strchr("0123456789,#.*WPTS-", *p) && *p) {
+ if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first))
+ *q++ = *p;
+ p++;
+ first = 0;
+ }
+ *q = 0;
+}
+
+/*
+ * Parse and perform an AT-command-line.
+ *
+ * Parameter:
+ * channel index to line (minor-device)
+ */
+static void isdn_tty_parse_at(modem_info * info)
+{
+ atemu *m = &dev->mdm.atmodem[info->line];
+ char *p;
+ int mreg;
+ int mval;
+ int i;
+ char rb[100];
+ char ds[40];
+ isdn_ctrl cmd;
+
+#ifdef ISDN_DEBUG_AT
+ printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
+#endif
+ for (p = &m->mdmcmd[2]; *p;) {
+ switch (*p) {
+ case 'A':
+ /* A - Accept incoming call */
+ p++;
+ if (m->mdmreg[1]) {
+#define FIDOBUG
+#ifdef FIDOBUG
+/* Variables fido... defined temporarily for finding a strange bug */
+ driver *fido_drv;
+ isdn_if *fido_if;
+ int fido_isdn_driver;
+ modem_info *fido_modem_info;
+ int (*fido_command) (isdn_ctrl *);
+#endif
+ /* Accept incoming call */
+ m->mdmreg[1] = 0;
+ dev->mdm.msr[info->line] &= ~UART_MSR_RI;
+ cmd.driver = info->isdn_driver;
+ cmd.command = ISDN_CMD_SETL2;
+ cmd.arg = info->isdn_channel + (m->mdmreg[14] << 8);
+ dev->drv[info->isdn_driver]->interface->command(&cmd);
+ cmd.driver = info->isdn_driver;
+ cmd.command = ISDN_CMD_SETL3;
+ cmd.arg = info->isdn_channel + (m->mdmreg[15] << 8);
+ dev->drv[info->isdn_driver]->interface->command(&cmd);
+ cmd.driver = info->isdn_driver;
+ cmd.arg = info->isdn_channel;
+ cmd.command = ISDN_CMD_ACCEPTD;
+#ifdef FIDOBUG
+ fido_modem_info = info;
+ fido_isdn_driver = fido_modem_info->isdn_driver;
+ fido_drv = dev->drv[fido_isdn_driver];
+ fido_if = fido_drv->interface;
+ fido_command = fido_if->command;
+ fido_command(&cmd);
+#else
+ dev->drv[info->isdn_driver]->interface->command(&cmd);
+#endif
+ } else {
+ isdn_tty_modem_result(8, info);
+ return;
+ }
+ break;
+ case 'D':
+ /* D - Dial */
+ isdn_tty_getdial(++p, ds);
+ p += strlen(p);
+ if (!strlen(m->msn))
+ isdn_tty_modem_result(10, info);
+ else if (strlen(ds))
+ isdn_tty_dial(ds, info, m);
+ else
+ isdn_tty_modem_result(4, info);
+ return;
+ case 'E':
+ /* E - Turn Echo on/off */
+ p++;
+ switch (*p) {
+ case '0':
+ p++;
+ m->mdmreg[12] &= ~4;
+ break;
+ case '1':
+ p++;
+ m->mdmreg[12] |= 4;
+ break;
+ default:
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ break;
+ case 'H':
+ /* H - On/Off-hook */
+ p++;
+ switch (*p) {
+ case '0':
+ p++;
+ isdn_tty_on_hook(info);
+ break;
+ case '1':
+ p++;
+ isdn_tty_off_hook();
+ break;
+ default:
+ isdn_tty_on_hook(info);
+ break;
+ }
+ break;
+ case 'I':
+ /* I - Information */
+ p++;
+ isdn_tty_at_cout("ISDN for Linux (c) by Fritz Elfert\r\n", info);
+ switch (*p) {
+ case '0':
+ case '1':
+ p++;
+ break;
+ default:
+ }
+ break;
+ case 'O':
+ /* O - Go online */
+ p++;
+ if (dev->mdm.msr[info->line] & UART_MSR_DCD) /* if B-Channel is up */
+ isdn_tty_modem_result(5, info);
+ else
+ isdn_tty_modem_result(3, info);
+ return;
+ case 'Q':
+ /* Q - Turn Emulator messages on/off */
+ p++;
+ switch (*p) {
+ case '0':
+ p++;
+ m->mdmreg[12] |= 1;
+ break;
+ case '1':
+ p++;
+ m->mdmreg[12] &= ~1;
+ break;
+ default:
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ break;
+ case 'S':
+ /* S - Set/Get Register */
+ p++;
+ mreg = isdn_getnum(&p);
+ if (mreg < 0 || mreg > ISDN_MODEM_ANZREG) {
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ switch (*p) {
+ case '=':
+ p++;
+ mval = isdn_getnum(&p);
+ if (mval >= 0 && mval <= 255) {
+ if ((mreg == 16) && ((mval * 16) > ISDN_SERIAL_XMIT_SIZE)) {
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ m->mdmreg[mreg] = mval;
+ } else {
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ break;
+ case '?':
+ p++;
+ isdn_tty_show_profile(mreg, info);
+ return;
+ break;
+ default:
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ break;
+ case 'V':
+ /* V - Numeric or ASCII Emulator-messages */
+ p++;
+ switch (*p) {
+ case '0':
+ p++;
+ m->mdmreg[12] |= 2;
+ break;
+ case '1':
+ p++;
+ m->mdmreg[12] &= ~2;
+ break;
+ default:
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ break;
+ case 'Z':
+ /* Z - Load Registers from Profile */
+ p++;
+ isdn_tty_modem_reset_regs(m, 1);
+ break;
+ case '+':
+ p++;
+ switch (*p) {
+ case 'F':
+ break;
+ }
+ break;
+ case '&':
+ p++;
+ switch (*p) {
+ case 'B':
+ /* &B - Set Buffersize */
+ p++;
+ i = isdn_getnum(&p);
+ if ((i < 0) || (i > ISDN_SERIAL_XMIT_SIZE)) {
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ m->mdmreg[16] = i / 16;
+ break;
+ case 'D':
+ /* &D - Set DCD-Low-behavior */
+ p++;
+ switch (isdn_getnum(&p)) {
+ case 2:
+ m->mdmreg[12] &= ~32;
+ break;
+ case 3:
+ m->mdmreg[12] |= 32;
+ break;
+ default:
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ break;
+ case 'E':
+ /* &E -Set EAZ/MSN */
+ p++;
+ isdn_tty_get_msnstr(m->msn, &p);
+ break;
+ case 'F':
+ /* &F -Set Factory-Defaults */
+ p++;
+ isdn_tty_reset_profile(m);
+ isdn_tty_modem_reset_regs(m, 1);
+ break;
+ case 'S':
+ /* &S - Set Windowsize */
+ p++;
+ i = isdn_getnum(&p);
+ if ((i > 0) && (i < 9))
+ m->mdmreg[17] = i;
+ else {
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ break;
+ case 'V':
+ /* &V - Show registers */
+ p++;
+ for (i = 0; i < ISDN_MODEM_ANZREG; i++) {
+ sprintf(rb, "S%d=%d%s", i, m->mdmreg[i], (i == 6) ? "\r\n" : " ");
+ isdn_tty_at_cout(rb, info);
+ }
+ sprintf(rb, "\r\nEAZ/MSN: %s\r\n", strlen(m->msn) ? m->msn : "None");
+ isdn_tty_at_cout(rb, info);
+ break;
+ case 'W':
+ /* &W - Write Profile */
+ p++;
+ switch (*p) {
+ case '0':
+ p++;
+ modem_write_profile(m);
+ break;
+ default:
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ break;
+ case 'X':
+ /* &X - Switch to BTX-Mode */
+ p++;
+ switch (*p) {
+ case '0':
+ p++;
+ m->mdmreg[13] &= ~2;
+ break;
+ case '1':
+ p++;
+ m->mdmreg[13] |= 2;
+ m->mdmreg[14] = 0;
+ m->mdmreg[16] = 7;
+ m->mdmreg[18] = 7;
+ m->mdmreg[19] = 0;
+ break;
+ default:
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ break;
+ default:
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ break;
+ default:
+ isdn_tty_modem_result(4, info);
+ return;
+ }
+ }
+ isdn_tty_modem_result(0, info);
+}
+
+/* Need own toupper() because standard-toupper is not available
+ * within modules.
+ */
+#define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
+
+/*
+ * Perform line-editing of AT-commands
+ *
+ * Parameters:
+ * p inputbuffer
+ * count length of buffer
+ * channel index to line (minor-device)
+ * user flag: buffer is in userspace
+ */
+static int isdn_tty_edit_at(const char *p, int count, modem_info * info, int user)
+{
+ atemu *m = &dev->mdm.atmodem[info->line];
+ int total = 0;
+ u_char c;
+ char eb[2];
+ int cnt;
+
+ for (cnt = count; cnt > 0; p++, cnt--) {
+ if (user)
+ c = get_fs_byte(p);
+ else
+ c = *p;
+ total++;
+ if (c == m->mdmreg[3] || c == m->mdmreg[4]) {
+ /* Separator (CR oder LF) */
+ m->mdmcmd[m->mdmcmdl] = 0;
+ if (m->mdmreg[12] & 4) {
+ eb[0] = c;
+ eb[1] = 0;
+ isdn_tty_at_cout(eb, info);
+ }
+ if (m->mdmcmdl >= 2)
+ isdn_tty_parse_at(info);
+ m->mdmcmdl = 0;
+ continue;
+ }
+ if (c == m->mdmreg[5] && m->mdmreg[5] < 128) {
+ /* Backspace-Funktion */
+ if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
+ if (m->mdmcmdl)
+ m->mdmcmdl--;
+ if (m->mdmreg[12] & 4)
+ isdn_tty_at_cout("\b", info);
+ }
+ continue;
+ }
+ if (cmdchar(c)) {
+ if (m->mdmreg[12] & 4) {
+ eb[0] = c;
+ eb[1] = 0;
+ isdn_tty_at_cout(eb, info);
+ }
+ if (m->mdmcmdl < 255) {
+ c = my_toupper(c);
+ switch (m->mdmcmdl) {
+ case 0:
+ if (c == 'A')
+ m->mdmcmd[m->mdmcmdl++] = c;
+ break;
+ case 1:
+ if (c == 'T')
+ m->mdmcmd[m->mdmcmdl++] = c;
+ break;
+ default:
+ m->mdmcmd[m->mdmcmdl++] = c;
+ }
+ }
+ }
+ }
+ return total;
+}
+
+/*
+ * Switch all modem-channels who are online and got a valid
+ * escape-sequence 1.5 seconds ago, to command-mode.
+ * This function is called every second via timer-interrupt from within
+ * timer-dispatcher isdn_timer_function()
+ */
+void isdn_tty_modem_escape(void)
+{
+ int ton = 0;
+ int i;
+ int midx;
+
+ for (i = 0; i < ISDN_MAX_CHANNELS; i++)
+ if (USG_MODEM(dev->usage[i]))
+ if ((midx = dev->m_idx[i]) >= 0)
+ if (dev->mdm.online[midx]) {
+ ton = 1;
+ if ((dev->mdm.atmodem[midx].pluscount == 3) &&
+ ((jiffies - dev->mdm.atmodem[midx].lastplus) > PLUSWAIT2)) {
+ dev->mdm.atmodem[midx].pluscount = 0;
+ dev->mdm.online[midx] = 0;
+ isdn_tty_modem_result(0, &dev->mdm.info[midx]);
+ }
+ }
+ isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
+}
+
+/*
+ * Put a RING-message to all modem-channels who have the RI-bit set.
+ * This function is called every second via timer-interrupt from within
+ * timer-dispatcher isdn_timer_function()
+ */
+void isdn_tty_modem_ring(void)
+{
+ int ton = 0;
+ int i;
+ int midx;
+
+ for (i = 0; i < ISDN_MAX_CHANNELS; i++)
+ if (USG_MODEM(dev->usage[i]))
+ if ((midx = dev->m_idx[i]) >= 0)
+ if (dev->mdm.msr[midx] & UART_MSR_RI) {
+ ton = 1;
+ isdn_tty_modem_result(2, &dev->mdm.info[midx]);
+ }
+ isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
+}
+
+void isdn_tty_modem_xmit(void)
+{
+ int ton = 0;
+ int i;
+ int midx;
+ char *bufptr;
+ int buflen;
+
+ for (i = 0; i < ISDN_MAX_CHANNELS; i++)
+ if (USG_MODEM(dev->usage[i]))
+ if ((midx = dev->m_idx[i]) >= 0)
+ if (dev->mdm.online[midx]) {
+ modem_info *info = &(dev->mdm.info[midx]);
+ ulong flags;
+
+ save_flags(flags);
+ cli();
+ if (info->xmit_count > 0) {
+ struct tty_struct *tty = info->tty;
+ ton = 1;
+#if 0
+ printk(KERN_DEBUG "WB2: %d\n", info->xmit_count);
+#endif
+ bufptr = info->xmit_buf;
+ buflen = info->xmit_count;
+ if (dev->mdm.atmodem[midx].mdmreg[13] & 2) {
+ /* Add T.70 simplyfied header */
+#ifdef ISDN_DEBUG_MODEM_DUMP
+ isdn_dumppkt("T70pack3:", bufptr, buflen, 40);
+#endif
+ bufptr -= 4;
+ buflen += 4;
+ memcpy(bufptr, "\1\0\1\0", 4);
+#ifdef ISDN_DEBUG_MODEM_DUMP
+ isdn_dumppkt("T70pack4:", bufptr, buflen, 40);
+#endif
+ }
+ if (dev->drv[info->isdn_driver]->interface->
+ writebuf(info->isdn_driver, info->isdn_channel, bufptr, buflen, 0) > 0) {
+ info->xmit_count = 0;
+ info->xmit_size = dev->mdm.atmodem[midx].mdmreg[16] * 16;
+#if FUTURE
+ info->send_outstanding++;
+ dev->mdm.msr[midx] &= ~UART_MSR_CTS;
+#endif
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup) (tty);
+ wake_up_interruptible(&tty->write_wait);
+ }
+ }
+ restore_flags(flags);
+ }
+ isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
+}
+
+#if FUTURE
+/*
+ * A packet has been output successfully.
+ * Search the tty-devices for an aproppriate device, decrement it's
+ * counter for outstanding packets, and set CTS if this counter reaches 0.
+ */
+void isdn_tty_bsent(int drv, int chan)
+{
+ int i;
+ ulong flags;
+
+ save_flags(flags);
+ cli();
+ for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
+ modem_info *info = &dev->mdm.info[i];
+ if ((info->isdn_driver == drv) &&
+ (info->isdn_channel == chan) &&
+ (info->send_outstanding)) {
+ if (!(--info->send_outstanding))
+ dev->mdm.msr[i] |= UART_MSR_CTS;
+ restore_flags(flags);
+ return;
+ }
+ }
+ restore_flags(flags);
+ return;
+}
+#endif /* FUTURE */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov
with Sam's (original) version of this