diff options
Diffstat (limited to 'drivers/isdn/isdn_tty.c')
| -rw-r--r-- | drivers/isdn/isdn_tty.c | 2805 |
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; +} |