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authorRalf Baechle <ralf@linux-mips.org>1997-01-07 02:33:00 +0000
committer <ralf@linux-mips.org>1997-01-07 02:33:00 +0000
commitbeb116954b9b7f3bb56412b2494b562f02b864b1 (patch)
tree120e997879884e1b9d93b265221b939d2ef1ade1 /drivers/isdn/isdn_tty.c
parent908d4681a1dc3792ecafbe64265783a86c4cccb6 (diff)
Import of Linux/MIPS 2.1.14
Diffstat (limited to 'drivers/isdn/isdn_tty.c')
-rw-r--r--drivers/isdn/isdn_tty.c2805
1 files changed, 2805 insertions, 0 deletions
diff --git a/drivers/isdn/isdn_tty.c b/drivers/isdn/isdn_tty.c
new file mode 100644
index 000000000..e1522022f
--- /dev/null
+++ b/drivers/isdn/isdn_tty.c
@@ -0,0 +1,2805 @@
+/* $Id: isdn_tty.c,v 1.21 1996/06/24 17:40:28 fritz Exp $
+ *
+ * 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 1.21 1996/06/24 17:40:28 fritz
+ * Bugfix: Did not compile without CONFIG_ISDN_AUDIO
+ *
+ * Revision 1.20 1996/06/15 14:59:39 fritz
+ * Fixed isdn_tty_tint() to handle partially sent
+ * sk_buffs.
+ *
+ * Revision 1.19 1996/06/12 15:53:56 fritz
+ * Bugfix: AT+VTX and AT+VRX could be executed without
+ * having a connection.
+ * Missing check for NULL tty in isdn_tty_flush_buffer().
+ *
+ * Revision 1.18 1996/06/07 11:17:33 tsbogend
+ * added missing #ifdef CONFIG_ISDN_AUDIO to make compiling without
+ * audio support possible
+ *
+ * Revision 1.17 1996/06/06 14:55:47 fritz
+ * Changed to support DTMF decoding on audio playback also.
+ * Bugfix: Added check for invalid info->isdn_driver in
+ * isdn_tty_senddown().
+ * Clear ncarrier flag on last close() of a tty.
+ *
+ * Revision 1.16 1996/06/05 02:24:12 fritz
+ * Added DTMF decoder for audio mode.
+ *
+ * Revision 1.15 1996/06/03 20:35:01 fritz
+ * Fixed typos.
+ *
+ * Revision 1.14 1996/06/03 20:12:19 fritz
+ * Fixed typos.
+ * Added call to write_wakeup via isdn_tty_flush_buffer()
+ * in isdn_tty_modem_hup().
+ *
+ * Revision 1.13 1996/05/31 01:33:29 fritz
+ * Changed buffering due to bad performance with mgetty.
+ * Now sk_buff is delayed allocated in isdn_tty_senddown
+ * using xmit_buff like in standard serial driver.
+ * Fixed module locking.
+ * Added DLE-DC4 handling in voice mode.
+ *
+ * Revision 1.12 1996/05/19 01:34:40 fritz
+ * Bugfix: ATS returned error.
+ * Register 20 made readonly.
+ *
+ * Revision 1.11 1996/05/18 01:37:03 fritz
+ * Added spelling corrections and some minor changes
+ * to stay in sync with kernel.
+ *
+ * Revision 1.10 1996/05/17 03:51:49 fritz
+ * Changed DLE handling for audio receive.
+ *
+ * Revision 1.9 1996/05/11 21:52:07 fritz
+ * Changed queue management to use sk_buffs.
+ *
+ * Revision 1.8 1996/05/10 08:49:43 fritz
+ * Checkin before major changes of tty-code.
+ *
+ * Revision 1.7 1996/05/07 09:15:09 fritz
+ * Reorganized and general cleanup.
+ * Bugfixes:
+ * - Audio-transmit working now.
+ * - "NO CARRIER" now reported, when hanging up with DTR low.
+ * - Corrected CTS handling.
+ *
+ * Revision 1.6 1996/05/02 03:59:25 fritz
+ * Bugfixes:
+ * - On dialout, layer-2 setup had been incomplete
+ * when using new auto-layer2 feature.
+ * - On hangup, "NO CARRIER" message sometimes missing.
+ *
+ * Revision 1.5 1996/04/30 21:05:25 fritz
+ * Test commit
+ *
+ * Revision 1.4 1996/04/20 16:39:54 fritz
+ * Changed all io to go through generic routines in isdn_common.c
+ * Fixed a real ugly bug in modem-emulator: 'ATA' had been accepted
+ * even when a call has been cancelled from the remote machine.
+ *
+ * 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
+ *
+ */
+
+#include <asm/uaccess.h>
+#define __NO_VERSION__
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/isdn.h>
+#include "isdn_common.h"
+#include "isdn_tty.h"
+#ifdef CONFIG_ISDN_AUDIO
+#include "isdn_audio.h"
+#define VBUF 0x3e0
+#define VBUFX (VBUF/16)
+#endif
+
+/* 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);
+static void isdn_tty_cmd_ATA(modem_info *);
+static void isdn_tty_at_cout(char *, modem_info *);
+static void isdn_tty_flush_buffer(struct tty_struct *);
+
+/* 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";
+static int bit2si[8] = {1,5,7,7,7,7,7,7};
+static int si2bit[8] = {4,1,4,4,4,4,4,4};
+
+char *isdn_tty_revision = "$Revision: 1.21 $";
+
+#define DLE 0x10
+#define ETX 0x03
+#define DC4 0x14
+
+/* isdn_tty_try_read() is called from within isdn_receive_callback()
+ * to stuff incoming data directly into a tty's flip-buffer. This
+ * is done to speed up tty-receiving if the receive-queue is empty.
+ * This routine MUST be called with interrupts off.
+ * Return:
+ * 1 = Success
+ * 0 = Failure, data has to be buffered and later processed by
+ * isdn_tty_readmodem().
+ */
+int isdn_tty_try_read(modem_info *info, struct sk_buff *skb)
+{
+ int c;
+ int len;
+ struct tty_struct *tty;
+
+ if (info->online) {
+ if ((tty = info->tty)) {
+ if (info->mcr & UART_MCR_RTS) {
+ c = TTY_FLIPBUF_SIZE - tty->flip.count;
+ len = skb->len + skb->users;
+ if (c >= len) {
+ if (skb->users)
+ while (skb->len--) {
+ if (*skb->data == DLE)
+ tty_insert_flip_char(tty, DLE, 0);
+ tty_insert_flip_char(tty, *skb->data++, 0);
+ }
+ else {
+ memcpy(tty->flip.char_buf_ptr,
+ skb->data, len);
+ tty->flip.count += len;
+ tty->flip.char_buf_ptr += len;
+ memset(tty->flip.flag_buf_ptr, 0, len);
+ tty->flip.flag_buf_ptr += len;
+ }
+ if (info->emu.mdmreg[12] & 128)
+ tty->flip.flag_buf_ptr[len - 1] = 0xff;
+ queue_task_irq_off(&tty->flip.tqueue, &tq_timer);
+ skb->free = 1;
+ kfree_skb(skb, FREE_READ);
+ return 1;
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+/* isdn_tty_readmodem() is called periodically from within timer-interrupt.
+ * It tries getting received data from the receive queue an stuff it into
+ * the tty's flip-buffer.
+ */
+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) {
+ info = &dev->mdm.info[midx];
+ if (info->online) {
+ r = 0;
+#ifdef CONFIG_ISDN_AUDIO
+ isdn_audio_eval_dtmf(info);
+#endif
+ if ((tty = info->tty)) {
+ if (info->mcr & UART_MCR_RTS) {
+ c = TTY_FLIPBUF_SIZE - tty->flip.count;
+ if (c > 0) {
+ save_flags(flags);
+ cli();
+ r = isdn_readbchan(info->isdn_driver, info->isdn_channel,
+ tty->flip.char_buf_ptr,
+ tty->flip.flag_buf_ptr, c, 0);
+ /* CISCO AsyncPPP Hack */
+ if (!(info->emu.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);
+ restore_flags(flags);
+ }
+ } else
+ r = 1;
+ } else
+ r = 1;
+ if (r) {
+ info->rcvsched = 0;
+ resched = 1;
+ } else
+ info->rcvsched = 1;
+ }
+ }
+ }
+ if (!resched)
+ isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
+}
+
+void isdn_tty_cleanup_xmit(modem_info *info)
+{
+ struct sk_buff *skb;
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+ if (skb_queue_len(&info->xmit_queue))
+ while ((skb = skb_dequeue(&info->xmit_queue))) {
+ skb->free = 1;
+ kfree_skb(skb, FREE_WRITE);
+ }
+ if (skb_queue_len(&info->dtmf_queue))
+ while ((skb = skb_dequeue(&info->dtmf_queue))) {
+ skb->free = 1;
+ kfree_skb(skb, FREE_WRITE);
+ }
+ restore_flags(flags);
+}
+
+static void isdn_tty_tint(modem_info *info)
+{
+ struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
+ int len, slen;
+
+ if (!skb)
+ return;
+ len = skb->len;
+ if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
+ info->isdn_channel, skb)) == len) {
+ struct tty_struct *tty = info->tty;
+ info->send_outstanding++;
+ info->msr |= UART_MSR_CTS;
+ info->lsr |= UART_LSR_TEMT;
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup) (tty);
+ wake_up_interruptible(&tty->write_wait);
+ return;
+ }
+ if (slen > 0)
+ skb_pull(skb,slen);
+ skb_queue_head(&info->xmit_queue, skb);
+}
+
+#ifdef CONFIG_ISDN_AUDIO
+int isdn_tty_countDLE(unsigned char *buf, int len)
+{
+ int count = 0;
+
+ while (len--)
+ if (*buf++ == DLE)
+ count++;
+ return count;
+}
+
+/* This routine is called from within isdn_tty_write() to perform
+ * DLE-decoding when sending audio-data.
+ */
+static int isdn_tty_handleDLEdown(modem_info *info, atemu *m, int len)
+{
+ unsigned char *p = &info->xmit_buf[info->xmit_count];
+ int count = 0;
+
+ while (len>0) {
+ if (m->lastDLE) {
+ m->lastDLE = 0;
+ switch (*p) {
+ case DLE:
+ /* Escape code */
+ if (len>1)
+ memmove(p,p+1,len-1);
+ p--;
+ count++;
+ break;
+ case ETX:
+ /* End of data */
+ info->vonline |= 4;
+ return count;
+ case DC4:
+ /* Abort RX */
+ info->vonline &= ~1;
+ isdn_tty_at_cout("\020\003", info);
+ if (!info->vonline)
+ isdn_tty_at_cout("\r\nVCON\r\n", info);
+ /* Fall through */
+ case 'q':
+ case 's':
+ /* Silence */
+ if (len>1)
+ memmove(p,p+1,len-1);
+ p--;
+ break;
+ }
+ } else {
+ if (*p == DLE)
+ m->lastDLE = 1;
+ else
+ count++;
+ }
+ p++;
+ len--;
+ }
+ if (len<0) {
+ printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
+ return 0;
+ }
+ return count;
+}
+
+/* This routine is called from within isdn_tty_write() when receiving
+ * audio-data. It interrupts receiving, if an character other than
+ * ^S or ^Q is sent.
+ */
+static int isdn_tty_end_vrx(const char *buf, int c, int from_user)
+{
+ char tmpbuf[VBUF];
+ char *p;
+
+ if (c > VBUF) {
+ printk(KERN_ERR "isdn_tty: (end_vrx) BUFFER OVERFLOW!!!\n");
+ return 1;
+ }
+ if (from_user) {
+ copy_from_user(tmpbuf, buf, c);
+ p = tmpbuf;
+ } else
+ p = (char *)buf;
+ while (c--) {
+ if ((*p != 0x11) && (*p != 0x13))
+ return 1;
+ p++;
+ }
+ return 0;
+}
+
+static int voice_cf[7] = { 1, 1, 4, 3, 2, 1, 1 };
+
+#endif /* CONFIG_ISDN_AUDIO */
+
+/* isdn_tty_senddown() is called either directly from within isdn_tty_write()
+ * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
+ * outgoing data from the tty's xmit-buffer, handles voice-decompression or
+ * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
+ */
+static void isdn_tty_senddown(modem_info * info)
+{
+ unsigned char *buf = info->xmit_buf;
+ int buflen;
+ int skb_res;
+ struct sk_buff *skb;
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+ if (!(buflen = info->xmit_count)) {
+ restore_flags(flags);
+ return;
+ }
+ if (info->isdn_driver < 0) {
+ info->xmit_count = 0;
+ restore_flags(flags);
+ return;
+ }
+ skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
+#ifdef CONFIG_ISDN_AUDIO
+ if (info->vonline & 2) {
+ /* For now, ifmt is fixed to 1 (alaw), since this
+ * is used with ISDN everywhere in the world, except
+ * US, Canada and Japan.
+ * Later, when US-ISDN protocols are implemented,
+ * this setting will depend on the D-channel protocol.
+ */
+ int ifmt = 1;
+ int skb_len;
+ unsigned char hbuf[VBUF];
+
+ memcpy(hbuf,info->xmit_buf,buflen);
+ info->xmit_count = 0;
+ restore_flags(flags);
+ /* voice conversion/decompression */
+ skb_len = buflen * voice_cf[info->emu.vpar[3]];
+ skb = dev_alloc_skb(skb_len + skb_res);
+ if (!skb) {
+ printk(KERN_WARNING
+ "isdn_tty: Out of memory in ttyI%d senddown\n", info->line);
+ return;
+ }
+ skb_reserve(skb, skb_res);
+ switch (info->emu.vpar[3]) {
+ case 2:
+ case 3:
+ case 4:
+ /* adpcm, compatible to ZyXel 1496 modem
+ * with ROM revision 6.01
+ */
+ buflen = isdn_audio_adpcm2xlaw(info->adpcms,
+ ifmt,
+ hbuf,
+ skb_put(skb,skb_len),
+ buflen);
+ skb_trim(skb, buflen);
+ break;
+ case 5:
+ /* a-law */
+ if (!ifmt)
+ isdn_audio_alaw2ulaw(hbuf,buflen);
+ memcpy(skb_put(skb,buflen),hbuf,buflen);
+ break;
+ case 6:
+ /* u-law */
+ if (ifmt)
+ isdn_audio_ulaw2alaw(hbuf,buflen);
+ memcpy(skb_put(skb,buflen),hbuf,buflen);
+ break;
+ }
+ if (info->vonline & 4) {
+ info->vonline &= ~6;
+ if (!info->vonline)
+ isdn_tty_at_cout("\r\nVCON\r\n",info);
+ }
+ } else {
+#endif /* CONFIG_ISDN_AUDIO */
+ skb = dev_alloc_skb(buflen + skb_res);
+ if (!skb) {
+ printk(KERN_WARNING
+ "isdn_tty: Out of memory in ttyI%d senddown\n", info->line);
+ restore_flags(flags);
+ return;
+ }
+ skb_reserve(skb, skb_res);
+ memcpy(skb_put(skb,buflen),buf,buflen);
+ info->xmit_count = 0;
+ restore_flags(flags);
+#ifdef CONFIG_ISDN_AUDIO
+ }
+#endif
+ skb->free = 1;
+ if (info->emu.mdmreg[13] & 2)
+ /* Add T.70 simplified header */
+ memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
+ skb_queue_tail(&info->xmit_queue, skb);
+ if ((info->emu.mdmreg[12] & 0x10) != 0)
+ info->msr &= UART_MSR_CTS;
+ info->lsr &= UART_LSR_TEMT;
+}
+
+/************************************************************
+ *
+ * Modem-functions
+ *
+ * mostly "stolen" from original Linux-serial.c and friends.
+ *
+ ************************************************************/
+
+/* The next routine is called once from within timer-interrupt
+ * triggered within isdn_tty_modem_ncarrier(). It calls
+ * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
+ * into the tty's flip-buffer.
+ */
+static void isdn_tty_modem_do_ncarrier(unsigned long data)
+{
+ modem_info * info = (modem_info *)data;
+ isdn_tty_modem_result(3, info);
+}
+
+/* Next routine is called, whenever the DTR-signal is raised.
+ * It checks the ncarrier-flag, and triggers the above routine
+ * when necessary. The ncarrier-flag is set, whenever DTR goes
+ * low.
+ */
+static void isdn_tty_modem_ncarrier(modem_info * info)
+{
+ if (info->ncarrier) {
+ info->ncarrier = 0;
+ info->nc_timer.expires = jiffies + HZ;
+ info->nc_timer.function = isdn_tty_modem_do_ncarrier;
+ info->nc_timer.data = (unsigned long)info;
+ add_timer(&info->nc_timer);
+ }
+}
+
+/* isdn_tty_dial() performs dialing of a tty an the necessary
+ * setup of the lower levels before that.
+ */
+static void isdn_tty_dial(char *n, modem_info * info, atemu * m)
+{
+ int usg = ISDN_USAGE_MODEM;
+ int si = 7;
+ int l2 = m->mdmreg[14];
+ isdn_ctrl cmd;
+ ulong flags;
+ int i;
+ int j;
+
+ for (j=7;j>=0;j--)
+ if (m->mdmreg[18] & (1<<j)) {
+ si = bit2si[j];
+ break;
+ }
+#ifdef CONFIG_ISDN_AUDIO
+ if (si == 1) {
+ l2 = 4;
+ usg = ISDN_USAGE_VOICE;
+ }
+#endif
+ m->mdmreg[20] = si2bit[si];
+ save_flags(flags);
+ cli();
+ i = isdn_get_free_channel(usg, l2, m->mdmreg[15], -1, -1);
+ if (i < 0) {
+ restore_flags(flags);
+ isdn_tty_modem_result(6, info);
+ } else {
+ 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 + (l2 << 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),
+ si, m->mdmreg[19]);
+ cmd.command = ISDN_CMD_DIAL;
+ info->dialing = 1;
+ strcpy(dev->num[i], n);
+ isdn_info_update();
+ dev->drv[info->isdn_driver]->interface->command(&cmd);
+ }
+}
+
+/* isdn_tty_hangup() disassociates a tty from the real
+ * ISDN-line (hangup). The usage-status is cleared
+ * and some cleanup is done also.
+ */
+void isdn_tty_modem_hup(modem_info * info)
+{
+ isdn_ctrl cmd;
+ int usage;
+
+ if (!info)
+ return;
+#ifdef ISDN_DEBUG_MODEM_HUP
+ printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
+#endif
+ info->rcvsched = 0;
+ info->online = 0;
+ isdn_tty_flush_buffer(info->tty);
+ if (info->vonline & 1) {
+ /* voice-recording, add DLE-ETX */
+ isdn_tty_at_cout("\020\003", info);
+ }
+ if (info->vonline & 2) {
+ /* voice-playing, add DLE-DC4 */
+ isdn_tty_at_cout("\020\024", info);
+ }
+ info->vonline = 0;
+#ifdef CONFIG_ISDN_AUDIO
+ if (info->dtmf_state) {
+ kfree(info->dtmf_state);
+ info->dtmf_state = NULL;
+ }
+ if (info->adpcms) {
+ kfree(info->adpcms);
+ info->adpcms = NULL;
+ }
+ if (info->adpcmr) {
+ kfree(info->adpcmr);
+ info->adpcmr = NULL;
+ }
+#endif
+ info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
+ info->lsr |= UART_LSR_TEMT;
+ 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);
+ usage = (info->emu.mdmreg[20] == 1)?
+ ISDN_USAGE_VOICE:ISDN_USAGE_MODEM;
+ isdn_free_channel(info->isdn_driver, info->isdn_channel,
+ usage);
+ }
+ info->isdn_driver = -1;
+ info->isdn_channel = -1;
+ if (info->drv_index >= 0) {
+ dev->m_idx[info->drv_index] = -1;
+ info->drv_index = -1;
+ }
+}
+
+static inline int isdn_tty_paranoia_check(modem_info * info, kdev_t device, const char *routine)
+{
+#ifdef MODEM_PARANOIA_CHECK
+ if (!info) {
+ printk(KERN_WARNING "isdn_tty: 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_tty: 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;
+ isdn_tty_modem_ncarrier(info);
+ } else {
+ info->mcr &= ~UART_MCR_DTR;
+ if (info->emu.mdmreg[13] & 4) {
+#ifdef ISDN_DEBUG_MODEM_HUP
+ printk(KERN_DEBUG "Mhup in changespeed\n");
+#endif
+ if (info->online)
+ info->ncarrier = 1;
+ isdn_tty_modem_reset_regs(&info->emu, 0);
+ isdn_tty_modem_hup(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;
+ save_flags(flags);
+ cli();
+ isdn_MOD_INC_USE_COUNT();
+#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;
+ info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
+ info->send_outstanding = 0;
+ 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 */
+ isdn_MOD_DEC_USE_COUNT();
+ if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
+ info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
+ if (info->emu.mdmreg[13] & 4) {
+ isdn_tty_modem_reset_regs(&info->emu, 0);
+#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);
+}
+
+/* isdn_tty_write() is the main send-routine. It is called from the upper
+ * levels within the kernel to perform sending data. Depending on the
+ * online-flag it either directs output to the at-command-interpreter or
+ * to the lower level. Additional tasks done here:
+ * - If online, check for escape-sequence (+++)
+ * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
+ * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
+ * - If dialing, abort dial.
+ */
+static int isdn_tty_write(struct tty_struct *tty, int from_user, const u_char * buf, int count)
+{
+ int c, total = 0;
+ ulong flags;
+ modem_info *info = (modem_info *) tty->driver_data;
+
+ 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);
+ if (info->isdn_driver >= 0)
+ c = MIN(c, dev->drv[info->isdn_driver]->maxbufsize);
+ if (c <= 0)
+ break;
+ if ((info->online > 1) ||
+ (info->vonline & 2)) {
+ atemu *m = &info->emu;
+
+ if (!(info->vonline & 2))
+ isdn_tty_check_esc(buf, m->mdmreg[2], c,
+ &(m->pluscount),
+ &(m->lastplus),
+ from_user);
+ if (from_user)
+ copy_from_user(&(info->xmit_buf[info->xmit_count]), buf, c);
+ else
+ memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
+#ifdef CONFIG_ISDN_AUDIO
+ if (info->vonline & 2) {
+ int cc;
+
+ if (!(cc = isdn_tty_handleDLEdown(info,m,c))) {
+ /* If DLE decoding results in zero-transmit, but
+ * c originally was non-zero, do a wakeup.
+ */
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup) (tty);
+ wake_up_interruptible(&tty->write_wait);
+ info->msr |= UART_MSR_CTS;
+ info->lsr |= UART_LSR_TEMT;
+ }
+ info->xmit_count += cc;
+ } else
+#endif
+ info->xmit_count += c;
+ if (m->mdmreg[13] & 1) {
+ isdn_tty_senddown(info);
+ isdn_tty_tint(info);
+ }
+ } else {
+ info->msr |= UART_MSR_CTS;
+ info->lsr |= UART_LSR_TEMT;
+#ifdef CONFIG_ISDN_AUDIO
+ if (info->vonline & 1) {
+ if (isdn_tty_end_vrx(buf, c, from_user)) {
+ info->vonline &= ~1;
+ isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
+ }
+ } else
+#endif
+ if (info->dialing) {
+ info->dialing = 0;
+#ifdef ISDN_DEBUG_MODEM_HUP
+ printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
+#endif
+ isdn_tty_modem_result(3, info);
+ isdn_tty_modem_hup(info);
+ } else
+ c = isdn_tty_edit_at(buf, c, info, from_user);
+ }
+ buf += c;
+ count -= c;
+ total += c;
+ }
+ if ((info->xmit_count) || (skb_queue_len(&info->xmit_queue)))
+ 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 (!info->online)
+ return info->xmit_size;
+ ret = info->xmit_size - info->xmit_count;
+ 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 (!info->online)
+ return 0;
+ return (info->xmit_count);
+}
+
+static void isdn_tty_flush_buffer(struct tty_struct *tty)
+{
+ modem_info *info;
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+ if (!tty) {
+ restore_flags(flags);
+ return;
+ }
+ info = (modem_info *) tty->driver_data;
+ if (isdn_tty_paranoia_check(info, tty->device, "isdn_tty_flush_buffer")) {
+ restore_flags(flags);
+ return;
+ }
+ isdn_tty_cleanup_xmit(info);
+ 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) || (skb_queue_len(&info->xmit_queue)))
+ 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 = info->lsr;
+ restore_flags(flags);
+ result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
+ return put_user(result, value);
+}
+
+
+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 = info->msr;
+ 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);
+ return put_user(result, value);
+}
+
+static int isdn_tty_set_modem_info(modem_info * info, uint cmd, uint * value)
+{
+ uint arg;
+ int pre_dtr;
+ int error;
+
+ error = get_user(arg, ((uint *) value));
+ if (error)
+ return error;
+
+ switch (cmd) {
+ case TIOCMBIS:
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "ttyI%d ioctl TIOCMBIS\n", info->line);
+#endif
+ if (arg & TIOCM_RTS) {
+ info->mcr |= UART_MCR_RTS;
+ }
+ if (arg & TIOCM_DTR) {
+ info->mcr |= UART_MCR_DTR;
+ isdn_tty_modem_ncarrier(info);
+ }
+ break;
+ case TIOCMBIC:
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "ttyI%d ioctl TIOCMBIC\n", info->line);
+#endif
+ if (arg & TIOCM_RTS) {
+ info->mcr &= ~UART_MCR_RTS;
+ }
+ if (arg & TIOCM_DTR) {
+ info->mcr &= ~UART_MCR_DTR;
+ if (info->emu.mdmreg[13] & 4) {
+ isdn_tty_modem_reset_regs(&info->emu, 0);
+#ifdef ISDN_DEBUG_MODEM_HUP
+ printk(KERN_DEBUG "Mhup in TIOCMBIC\n");
+#endif
+ if (info->online)
+ info->ncarrier = 1;
+ isdn_tty_modem_hup(info);
+ }
+ }
+ break;
+ case TIOCMSET:
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "ttyI%d ioctl TIOCMSET\n", info->line);
+#endif
+ pre_dtr = (info->mcr & UART_MCR_DTR);
+ 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 (pre_dtr |= (info->mcr & UART_MCR_DTR)) {
+ if (!(info->mcr & UART_MCR_DTR)) {
+ if (info->emu.mdmreg[13] & 4) {
+ isdn_tty_modem_reset_regs(&info->emu, 0);
+#ifdef ISDN_DEBUG_MODEM_HUP
+ printk(KERN_DEBUG "Mhup in TIOCMSET\n");
+#endif
+ if (info->online)
+ info->ncarrier = 1;
+ isdn_tty_modem_hup(info);
+ }
+ } else
+ isdn_tty_modem_ncarrier(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;
+ if (tty->flags & (1 << TTY_IO_ERROR))
+ return -EIO;
+ switch (cmd) {
+ case TCSBRK: /* SVID version: non-zero arg --> no break */
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
+#endif
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+ tty_wait_until_sent(tty, 0);
+ return 0;
+ case TCSBRKP: /* support for POSIX tcsendbreak() */
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
+#endif
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+ tty_wait_until_sent(tty, 0);
+ return 0;
+ case TIOCGSOFTCAR:
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "ttyI%d ioctl TIOCGSOFTCAR\n", info->line);
+#endif
+ return put_user(C_CLOCAL(tty) ? 1 : 0, (uint *) arg);
+ case TIOCSSOFTCAR:
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "ttyI%d ioctl TIOCSSOFTCAR\n", info->line);
+#endif
+ error = get_user(arg ,((uint *) arg));
+ if (error)
+ return error;
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (arg ? CLOCAL : 0));
+ return 0;
+ case TIOCMGET:
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
+#endif
+ 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 */
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
+#endif
+ return isdn_tty_get_lsr_info(info, (uint *) arg);
+
+ default:
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "UNKNOWN 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 (!old_termios)
+ isdn_tty_change_speed(info);
+ else {
+ 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) ||
+ (tty->flags & (1 << TTY_IO_ERROR))) {
+ 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 || (info->msr & 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;
+ }
+ 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 (!(info->lsr & UART_LSR_TEMT)) {
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + 20;
+ schedule();
+ if (jiffies > timeout)
+ break;
+ }
+ }
+ dev->modempoll--;
+ 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;
+ info->ncarrier = 0;
+ tty->closing = 0;
+ if (info->blocked_open) {
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + 50;
+ 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);
+}
+
+/* This routine initializes all emulator-data.
+ */
+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] = 4;
+ 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] = 4;
+ m->profile[19] = 0;
+ m->profile[20] = 0;
+ m->pmsn[0] = '\0';
+}
+
+static void isdn_tty_modem_reset_vpar(atemu *m)
+{
+ m->vpar[0] = 2; /* Voice-device (2 = phone line) */
+ m->vpar[1] = 0; /* Silence detection level (0 = none ) */
+ m->vpar[2] = 70; /* Silence interval (7 sec. ) */
+ m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
+}
+
+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);
+ }
+ isdn_tty_modem_reset_vpar(m);
+ 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;
+ 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_tty: Couldn't register modem-device\n");
+ return -1;
+ }
+ if (tty_register_driver(&m->cua_modem)) {
+ printk(KERN_WARNING "isdn_tty: Couldn't register modem-callout-device\n");
+ return -2;
+ }
+ for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
+ info = &m->info[i];
+ isdn_tty_reset_profile(&info->emu);
+ isdn_tty_modem_reset_regs(&info->emu, 1);
+ info->magic = ISDN_ASYNC_MAGIC;
+ info->line = i;
+ info->tty = 0;
+ 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->isdn_driver = -1;
+ info->isdn_channel = -1;
+ info->drv_index = -1;
+ info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
+ skb_queue_head_init(&info->xmit_queue);
+ skb_queue_head_init(&info->dtmf_queue);
+ if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_SIZE + 5, GFP_KERNEL))) {
+ printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
+ return -3;
+ }
+ /* Make room for T.70 header */
+ info->xmit_buf += 4;
+ }
+ return 0;
+}
+
+/*
+ * An incoming call-request has arrived.
+ * Search the tty-devices for an appropriate 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_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
+ } else
+ strncpy(nr, num, 30);
+ s = strtok(nr, ",");
+ s = strtok(NULL, ",");
+ if (!s) {
+ printk(KERN_WARNING "isdn_tty: 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_tty: 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_tty: 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++) {
+ modem_info *info = &dev->mdm.info[i];
+#ifdef ISDN_DEBUG_MODEM_ICALL
+ printk(KERN_DEBUG "m_fi: i=%d msn=%s mmsn=%s mreg18=%d mreg19=%d\n", i,
+ info->emu.msn, isdn_map_eaz2msn(info->emu.msn, di),
+ info->emu.mdmreg[18], info->emu.mdmreg[19]);
+#endif
+ if ((!strcmp(isdn_map_eaz2msn(info->emu.msn, di),
+ eaz)) && /* EAZ is matching */
+ (info->emu.mdmreg[18] & si2bit[si1]) && /* SI1 is matching */
+ ((info->emu.mdmreg[19] == si2) || !si2)) { /* SI2 is matching or 0 */
+ 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] |= (si1==1)?ISDN_USAGE_VOICE:ISDN_USAGE_MODEM;
+ strcpy(dev->num[idx], nr);
+ info->emu.mdmreg[20] = si2bit[si1];
+ 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 = &info->emu;
+ char *p;
+ char c;
+ ulong flags;
+
+ if (!msg) {
+ printk(KERN_WARNING "isdn_tty: 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_result(3, info);
+ isdn_tty_modem_hup(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) {
+ copy_from_user(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 = &info->emu;
+ static char *msg[] =
+ {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
+ "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
+ "RINGING", "NO MSN/EAZ", "VCON"};
+ ulong flags;
+ char s[4];
+
+ switch (code) {
+ case 2:
+ m->mdmreg[1]++; /* RING */
+ if (m->mdmreg[1] == m->mdmreg[0])
+ /* Automatically accept incoming call */
+ isdn_tty_cmd_ATA(info);
+ break;
+ case 3:
+ /* NO CARRIER */
+ save_flags(flags);
+ cli();
+#ifdef ISDN_DEBUG_MODEM_HUP
+ printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
+ (info->flags & ISDN_ASYNC_CLOSING),
+ (!info->tty));
+#endif
+ if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
+ restore_flags(flags);
+ return;
+ }
+ restore_flags(flags);
+ if (info->vonline & 1) {
+ /* voice-recording, add DLE-ETX */
+ isdn_tty_at_cout("\020\003", info);
+ }
+ if (info->vonline & 2) {
+ /* voice-playing, add DLE-DC4 */
+ isdn_tty_at_cout("\020\024", info);
+ }
+ break;
+ case 1:
+ case 5:
+ if (!info->online)
+ info->online = 2;
+ break;
+ case 11:
+ if (!info->online)
+ info->online = 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->tty->ldisc.flush_buffer)
+ info->tty->ldisc.flush_buffer(info->tty);
+ 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, "\r\n%d", info->emu.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;
+}
+
+#define PARSE_ERROR { isdn_tty_modem_result(4, info); return; }
+#define PARSE_ERROR1 { isdn_tty_modem_result(4, info); return 1; }
+
+/*
+ * Parse AT&.. commands.
+ */
+static int isdn_tty_cmd_ATand(char **p, modem_info * info)
+{
+ atemu *m = &info->emu;
+ int i;
+ char rb[100];
+
+ switch (*p[0]) {
+ case 'B':
+ /* &B - Set Buffersize */
+ p[0]++;
+ i = isdn_getnum(p);
+ if ((i < 0) || (i > ISDN_SERIAL_XMIT_SIZE))
+ PARSE_ERROR1;
+#ifdef CONFIG_ISDN_AUDIO
+ if ((m->mdmreg[18] & 1) && (i > VBUF))
+ PARSE_ERROR1;
+#endif
+ m->mdmreg[16] = i / 16;
+ info->xmit_size = m->mdmreg[16] * 16;
+ break;
+ case 'D':
+ /* &D - Set DCD-Low-behavior */
+ p[0]++;
+ switch (isdn_getnum(p)) {
+ case 0:
+ m->mdmreg[13] &= ~4;
+ m->mdmreg[12] &= ~32;
+ break;
+ case 2:
+ m->mdmreg[13] |= 4;
+ m->mdmreg[12] &= ~32;
+ break;
+ case 3:
+ m->mdmreg[13] |= 4;
+ m->mdmreg[12] |= 32;
+ break;
+ default:
+ PARSE_ERROR1
+ }
+ break;
+ case 'E':
+ /* &E -Set EAZ/MSN */
+ p[0]++;
+ isdn_tty_get_msnstr(m->msn, p);
+ break;
+ case 'F':
+ /* &F -Set Factory-Defaults */
+ p[0]++;
+ isdn_tty_reset_profile(m);
+ isdn_tty_modem_reset_regs(m, 1);
+ break;
+ case 'S':
+ /* &S - Set Windowsize */
+ p[0]++;
+ i = isdn_getnum(p);
+ if ((i > 0) && (i < 9))
+ m->mdmreg[17] = i;
+ else
+ PARSE_ERROR1;
+ break;
+ case 'V':
+ /* &V - Show registers */
+ p[0]++;
+ 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[0]++;
+ switch (*p[0]) {
+ case '0':
+ p[0]++;
+ modem_write_profile(m);
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ break;
+ case 'X':
+ /* &X - Switch to BTX-Mode */
+ p[0]++;
+ switch (isdn_getnum(p)) {
+ case 0:
+ m->mdmreg[13] &= ~2;
+ info->xmit_size = m->mdmreg[16] * 16;
+ break;
+ case 1:
+ m->mdmreg[13] |= 2;
+ m->mdmreg[14] = 0;
+ info->xmit_size = 112;
+ m->mdmreg[18] = 4;
+ m->mdmreg[19] = 0;
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ return 0;
+}
+
+/*
+ * Perform ATS command
+ */
+static int isdn_tty_cmd_ATS(char **p, modem_info * info)
+{
+ atemu *m = &info->emu;
+ int mreg;
+ int mval;
+
+ mreg = isdn_getnum(p);
+ if (mreg < 0 || mreg > ISDN_MODEM_ANZREG)
+ PARSE_ERROR1;
+ switch (*p[0]) {
+ case '=':
+ p[0]++;
+ mval = isdn_getnum(p);
+ if (mval < 0 || mval > 255)
+ PARSE_ERROR1;
+ switch (mreg) {
+ /* Some plausibility checks */
+ case 14:
+ if (mval > ISDN_PROTO_L2_TRANS)
+ PARSE_ERROR1;
+ break;
+ case 16:
+ if ((mval * 16) > ISDN_SERIAL_XMIT_SIZE)
+ PARSE_ERROR1;
+#ifdef CONFIG_ISDN_AUDIO
+ if ((m->mdmreg[18] & 1) && (mval > VBUFX))
+ PARSE_ERROR1;
+#endif
+ info->xmit_size = mval * 16;
+ break;
+ case 20:
+ PARSE_ERROR1;
+ }
+ m->mdmreg[mreg] = mval;
+ break;
+ case '?':
+ p[0]++;
+ isdn_tty_show_profile(mreg, info);
+ break;
+ default:
+ PARSE_ERROR1;
+ break;
+ }
+ return 0;
+}
+
+/*
+ * Perform ATA command
+ */
+static void isdn_tty_cmd_ATA(modem_info * info)
+{
+ atemu *m = &info->emu;
+ isdn_ctrl cmd;
+ int l2;
+
+ if (info->msr & UART_MSR_RI) {
+ /* Accept incoming call */
+ m->mdmreg[1] = 0;
+ info->msr &= ~UART_MSR_RI;
+ l2 = m->mdmreg[14];
+#ifdef CONFIG_ISDN_AUDIO
+ /* If more than one bit set in reg18, autoselect Layer2 */
+ if ((m->mdmreg[18] & m->mdmreg[20]) != m->mdmreg[18])
+ if (m->mdmreg[20] == 1) l2 = 4;
+#endif
+ cmd.driver = info->isdn_driver;
+ cmd.command = ISDN_CMD_SETL2;
+ cmd.arg = info->isdn_channel + (l2 << 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;
+ dev->drv[info->isdn_driver]->interface->command(&cmd);
+ } else
+ isdn_tty_modem_result(8, info);
+}
+
+#ifdef CONFIG_ISDN_AUDIO
+/*
+ * Parse AT+F.. commands
+ */
+static int isdn_tty_cmd_PLUSF(char **p, modem_info * info)
+{
+ atemu *m = &info->emu;
+ int par;
+ char rs[20];
+
+ if (!strncmp(p[0],"CLASS",5)) {
+ p[0] += 5;
+ switch (*p[0]) {
+ case '?':
+ p[0]++;
+ sprintf(rs,"\r\n%d",
+ (m->mdmreg[18]&1)?8:0);
+ isdn_tty_at_cout(rs, info);
+ break;
+ case '=':
+ p[0]++;
+ switch (*p[0]) {
+ case '0':
+ p[0]++;
+ m->mdmreg[18] = 4;
+ info->xmit_size =
+ m->mdmreg[16] * 16;
+ break;
+ case '8':
+ p[0]++;
+ m->mdmreg[18] = 5;
+ info->xmit_size = VBUF;
+ break;
+ case '?':
+ p[0]++;
+ isdn_tty_at_cout("\r\n0,8",
+ info);
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ return 0;
+ }
+ if (!strncmp(p[0],"AA",2)) {
+ p[0] += 2;
+ switch (*p[0]) {
+ case '?':
+ p[0]++;
+ sprintf(rs,"\r\n%d",
+ m->mdmreg[0]);
+ isdn_tty_at_cout(rs, info);
+ break;
+ case '=':
+ p[0]++;
+ par = isdn_getnum(p);
+ if ((par < 0) || (par > 255))
+ PARSE_ERROR1;
+ m->mdmreg[0]=par;
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ return 0;
+ }
+ PARSE_ERROR1;
+}
+
+/*
+ * Parse AT+V.. commands
+ */
+static int isdn_tty_cmd_PLUSV(char **p, modem_info * info)
+{
+ atemu *m = &info->emu;
+ static char *vcmd[] = {"NH","IP","LS","RX","SD","SM","TX",NULL};
+ int i;
+ int par1;
+ int par2;
+ char rs[20];
+
+ i = 0;
+ while (vcmd[i]) {
+ if (!strncmp(vcmd[i],p[0],2)) {
+ p[0] += 2;
+ break;
+ }
+ i++;
+ }
+ switch (i) {
+ case 0:
+ /* AT+VNH - Auto hangup feature */
+ switch (*p[0]) {
+ case '?':
+ p[0]++;
+ isdn_tty_at_cout("\r\n1", info);
+ break;
+ case '=':
+ p[0]++;
+ switch (*p[0]) {
+ case '1':
+ p[0]++;
+ break;
+ case '?':
+ p[0]++;
+ isdn_tty_at_cout("\r\n1", info);
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ break;
+ case 1:
+ /* AT+VIP - Reset all voice parameters */
+ isdn_tty_modem_reset_vpar(m);
+ break;
+ case 2:
+ /* AT+VLS - Select device, accept incoming call */
+ switch (*p[0]) {
+ case '?':
+ p[0]++;
+ sprintf(rs,"\r\n%d",m->vpar[0]);
+ isdn_tty_at_cout(rs, info);
+ break;
+ case '=':
+ p[0]++;
+ switch (*p[0]) {
+ case '0':
+ p[0]++;
+ m->vpar[0] = 0;
+ break;
+ case '2':
+ p[0]++;
+ m->vpar[0] = 2;
+ break;
+ case '?':
+ p[0]++;
+ isdn_tty_at_cout("\r\n0,2", info);
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ break;
+ case 3:
+ /* AT+VRX - Start recording */
+ if (!m->vpar[0])
+ PARSE_ERROR1;
+ if (info->online != 1) {
+ isdn_tty_modem_result(8, info);
+ return 1;
+ }
+ info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
+ if (!info->dtmf_state) {
+ printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
+ PARSE_ERROR1;
+ }
+ if (m->vpar[3] < 5) {
+ info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
+ if (!info->adpcmr) {
+ printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
+ PARSE_ERROR1;
+ }
+ }
+ info->vonline = 1;
+ isdn_tty_modem_result(1, info);
+ return 1;
+ break;
+ case 4:
+ /* AT+VSD - Silence detection */
+ switch (*p[0]) {
+ case '?':
+ p[0]++;
+ sprintf(rs,"\r\n<%d>,<%d>",
+ m->vpar[1],
+ m->vpar[2]);
+ isdn_tty_at_cout(rs, info);
+ break;
+ case '=':
+ p[0]++;
+ switch (*p[0]) {
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ par1 = isdn_getnum(p);
+ if ((par1 < 0) || (par1 > 31))
+ PARSE_ERROR1;
+ if (*p[0] != ',')
+ PARSE_ERROR1;
+ p[0]++;
+ par2 = isdn_getnum(p);
+ if ((par2 < 0) || (par2 > 255))
+ PARSE_ERROR1;
+ m->vpar[1] = par1;
+ m->vpar[2] = par2;
+ break;
+ case '?':
+ p[0]++;
+ isdn_tty_at_cout("\r\n<0-31>,<0-255>",
+ info);
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ break;
+ case 5:
+ /* AT+VSM - Select compression */
+ switch (*p[0]) {
+ case '?':
+ p[0]++;
+ sprintf(rs,"\r\n<%d>,<%d><8000>",
+ m->vpar[3],
+ m->vpar[1]);
+ isdn_tty_at_cout(rs, info);
+ break;
+ case '=':
+ p[0]++;
+ switch (*p[0]) {
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ par1 = isdn_getnum(p);
+ if ((par1 < 2) || (par1 > 6))
+ PARSE_ERROR1;
+ m->vpar[3] = par1;
+ break;
+ case '?':
+ p[0]++;
+ isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
+ info);
+ isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
+ info);
+ isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
+ info);
+ isdn_tty_at_cout("5;ALAW;8;0;(8000)",
+ info);
+ isdn_tty_at_cout("6;ULAW;8;0;(8000)",
+ info);
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ break;
+ case 6:
+ /* AT+VTX - Start sending */
+ if (!m->vpar[0])
+ PARSE_ERROR1;
+ if (info->online != 1) {
+ isdn_tty_modem_result(8, info);
+ return 1;
+ }
+ info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
+ if (!info->dtmf_state) {
+ printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
+ PARSE_ERROR1;
+ }
+ if (m->vpar[3] < 5) {
+ info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
+ if (!info->adpcms) {
+ printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
+ PARSE_ERROR1;
+ }
+ }
+ m->lastDLE = 0;
+ info->vonline = 2;
+ isdn_tty_modem_result(1, info);
+ return 1;
+ break;
+ default:
+ PARSE_ERROR1;
+ }
+ return 0;
+}
+#endif /* CONFIG_ISDN_AUDIO */
+
+/*
+ * Parse and perform an AT-command-line.
+ */
+static void isdn_tty_parse_at(modem_info * info)
+{
+ atemu *m = &info->emu;
+ char *p;
+ char ds[40];
+
+#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++;
+ isdn_tty_cmd_ATA(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 (isdn_getnum(&p)) {
+ case 0:
+ m->mdmreg[12] &= ~4;
+ break;
+ case 1:
+ m->mdmreg[12] |= 4;
+ break;
+ default:
+ PARSE_ERROR;
+ }
+ 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("\r\nLinux ISDN", info);
+ switch (*p) {
+ case '0':
+ case '1':
+ p++;
+ break;
+ default:
+ }
+ break;
+ case 'O':
+ /* O - Go online */
+ p++;
+ if (info->msr & 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 (isdn_getnum(&p)) {
+ case 0:
+ m->mdmreg[12] |= 1;
+ break;
+ case 1:
+ m->mdmreg[12] &= ~1;
+ break;
+ default:
+ PARSE_ERROR;
+ }
+ break;
+ case 'S':
+ /* S - Set/Get Register */
+ p++;
+ if (isdn_tty_cmd_ATS(&p, info))
+ return;
+ break;
+ case 'V':
+ /* V - Numeric or ASCII Emulator-messages */
+ p++;
+ switch (isdn_getnum(&p)) {
+ case 0:
+ m->mdmreg[12] |= 2;
+ break;
+ case 1:
+ m->mdmreg[12] &= ~2;
+ break;
+ default:
+ PARSE_ERROR;
+ }
+ break;
+ case 'Z':
+ /* Z - Load Registers from Profile */
+ p++;
+ isdn_tty_modem_reset_regs(m, 1);
+ break;
+#ifdef CONFIG_ISDN_AUDIO
+ case '+':
+ p++;
+ switch (*p) {
+ case 'F':
+ p++;
+ if (isdn_tty_cmd_PLUSF(&p, info))
+ return;
+ break;
+ case 'V':
+ if (!(m->mdmreg[18] & 1))
+ PARSE_ERROR;
+ p++;
+ if (isdn_tty_cmd_PLUSV(&p, info))
+ return;
+ break;
+ }
+ break;
+#endif /* CONFIG_ISDN_AUDIO */
+ case '&':
+ p++;
+ if (isdn_tty_cmd_ATand(&p, 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 = &info->emu;
+ int total = 0;
+ u_char c;
+ char eb[2];
+ int cnt;
+
+ for (cnt = count; cnt > 0; p++, cnt--) {
+ if (user)
+ get_user(c, 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) {
+ modem_info *info = &dev->mdm.info[midx];
+ if (info->online) {
+ ton = 1;
+ if ((info->emu.pluscount == 3) &&
+ ((jiffies - info->emu.lastplus) > PLUSWAIT2)) {
+ info->emu.pluscount = 0;
+ info->online = 0;
+ isdn_tty_modem_result(0, info);
+ }
+ }
+ }
+ 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;
+
+ for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
+ modem_info *info = &dev->mdm.info[i];
+ if (info->msr & UART_MSR_RI) {
+ ton = 1;
+ isdn_tty_modem_result(2, info);
+ }
+ }
+ isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
+}
+
+/*
+ * For all online tty's, try sending data to
+ * the lower levels.
+ */
+void isdn_tty_modem_xmit(void)
+{
+ int ton = 1;
+ int i;
+
+ for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
+ modem_info *info = &dev->mdm.info[i];
+ if (info->online) {
+ ton = 1;
+ isdn_tty_senddown(info);
+ isdn_tty_tint(info);
+ }
+ }
+ isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
+}
+
+/*
+ * A packet has been output successfully.
+ * Search the tty-devices for an appropriate device, decrement its
+ * counter for outstanding packets, and set CTS.
+ */
+void isdn_tty_bsent(int drv, int chan)
+{
+ int i;
+
+ 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->msr |= UART_MSR_CTS;
+ if (info->send_outstanding)
+ if (!(--info->send_outstanding))
+ info->lsr |= UART_LSR_TEMT;
+ isdn_tty_tint(info);
+ }
+ }
+ return;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-20 02:40:50 +0000