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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [isdn/] [isdn_tty.c] - Rev 1765
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/* $Id: isdn_tty.c,v 1.1.1.1 2001-09-10 07:44:18 simons Exp $ * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel). * * Copyright 1994-1998 by Fritz Elfert (fritz@isdn4linux.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: not supported by cvs2svn $ * Revision 1.1.1.1 2001/07/02 17:58:31 simons * Initial revision * * Revision 1.41.2.11 1998/11/05 22:12:12 fritz * Changed mail-address. * * Revision 1.41.2.10 1998/11/03 14:31:35 fritz * Reduced stack usage in various functions. * Adapted statemachine to work with certified HiSax. * Some fixes in callback handling. * * Revision 1.41.2.9 1998/10/25 15:48:32 fritz * Misc bugfixes and adaptions to new HiSax * * Revision 1.41.2.8 1998/08/22 16:43:07 armin * Added silence detection in audio receive mode (AT+VSD). * * Revision 1.41.2.7 1998/06/07 13:48:08 fritz * ABC cleanup * * Revision 1.41.2.5 1998/04/08 21:42:35 keil * Blocksize default 1024 * * Revision 1.41.2.4 1998/03/19 17:58:55 detabc * remove 2 debug-messages (no longer needed) bug was fixed * * Revision 1.41.2.3 1998/03/07 23:35:20 detabc * added the abc-extension to the linux isdn-kernel * for kernel-version 2.0.xx * DO NOT USE FOR HIGHER KERNELS-VERSIONS * all source-lines are switched with the define CONFIG_ISDN_WITH_ABC * (make config and answer ABC-Ext. Support (Compress,TCP-Keepalive ...) with yes * * you need also a modified isdnctrl-source the switch on the * features of the abc-extension * * please use carefully. more detail will be follow. * thanks * * Revision 1.41.2.2 1998/03/07 23:02:51 tsbogend * fixed kernel unaligned traps on Linux/Alpha * * Revision 1.41.2.1 1997/08/21 15:56:11 fritz * Synchronized 2.0.X branch with 2.0.31-pre7 * * Revision 1.41 1997/05/27 15:17:31 fritz * Added changes for recent 2.1.x kernels: * changed return type of isdn_close * queue_task_* -> queue_task * clear/set_bit -> test_and_... where apropriate. * changed type of hard_header_cache parameter. * * Revision 1.40 1997/03/24 22:55:27 fritz * Added debug code for status callbacks. * * Revision 1.39 1997/03/21 18:25:56 fritz * Corrected CTS handling. * * Revision 1.38 1997/03/07 12:13:35 fritz * Bugfix: Send audio in adpcm format was broken. * Bugfix: CTS handling was wrong. * * Revision 1.37 1997/03/07 01:37:34 fritz * Bugfix: Did not compile with CONFIG_ISDN_AUDIO disabled. * Bugfix: isdn_tty_tint() did not handle lowlevel errors correctly. * Bugfix: conversion was wrong when sending ulaw audio. * Added proper ifdef's for CONFIG_ISDN_AUDIO * * Revision 1.36 1997/03/04 21:41:55 fritz * Fix: Excessive stack usage of isdn_tty_senddown() * and isdn_tty_end_vrx() could lead to problems. * * Revision 1.35 1997/03/02 19:05:52 fritz * Bugfix: Avoid recursion. * * Revision 1.34 1997/03/02 14:29:22 fritz * More ttyI related cleanup. * * Revision 1.33 1997/02/28 02:32:45 fritz * Cleanup: Moved some tty related stuff from isdn_common.c * to isdn_tty.c * Bugfix: Bisync protocol did not behave like documented. * * Revision 1.32 1997/02/23 15:43:03 fritz * Small change in handling of incoming calls * documented in newest version of ttyI.4 * * Revision 1.31 1997/02/21 13:05:57 fritz * Bugfix: Remote hangup did not set location-info on ttyI's * * Revision 1.30 1997/02/18 09:41:05 fritz * Added support for bitwise access to modem registers (ATSx.y=n, ATSx.y?). * Beautified output of AT&V. * * Revision 1.29 1997/02/16 12:11:51 fritz * Added S13,Bit4 option. * * Revision 1.28 1997/02/10 22:07:08 fritz * Added 2 modem registers for numbering plan and screening info. * * Revision 1.27 1997/02/10 21:31:14 fritz * Changed setup-interface (incoming and outgoing). * * Revision 1.26 1997/02/10 20:12:48 fritz * Changed interface for reporting incoming calls. * * Revision 1.25 1997/02/03 23:04:30 fritz * Reformatted according CodingStyle. * skb->free stuff replaced by macro. * Finished full-duplex audio. * * Revision 1.24 1997/01/14 01:32:42 fritz * Changed audio receive not to rely on skb->users and skb->lock. * Added ATI2 and related variables. * Started adding full-duplex audio capability. * * Revision 1.23 1996/10/22 23:14:02 fritz * Changes for compatibility to 2.0.X and 2.1.X kernels. * * Revision 1.22 1996/10/19 18:56:43 fritz * ATZ did not change the xmitbuf size. * * 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 * */ #undef ISDN_TTY_STAT_DEBUG #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(modem_info *, 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 *); static void isdn_tty_modem_result(int, modem_info *); #ifdef CONFIG_ISDN_AUDIO static int isdn_tty_countDLE(unsigned char *, int); #endif /* 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: 1.1.1.1 $"; #define DLE 0x10 #define ETX 0x03 #define DC4 0x14 /* isdn_tty_try_read() is called from within isdn_tty_rcv_skb() * 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(). */ static 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 #ifdef CONFIG_ISDN_AUDIO + ISDN_AUDIO_SKB_DLECOUNT(skb) #endif ; if (c >= len) { #ifdef CONFIG_ISDN_AUDIO if (ISDN_AUDIO_SKB_DLECOUNT(skb)) while (skb->len--) { if (*skb->data == DLE) tty_insert_flip_char(tty, DLE, 0); tty_insert_flip_char(tty, *skb->data++, 0); } else { #endif 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; #ifdef CONFIG_ISDN_AUDIO } #endif if (info->emu.mdmreg[12] & 128) tty->flip.flag_buf_ptr[len - 1] = 0xff; queue_task(&tty->flip.tqueue, &tq_timer); SET_SKB_FREE(skb); 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); if ((info->vonline & 1) && (info->emu.vpar[1])) isdn_audio_eval_silence(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(&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); } int isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb) { ulong flags; int midx; #ifdef CONFIG_ISDN_AUDIO int ifmt; #endif modem_info *info; if ((midx = dev->m_idx[i]) < 0) { /* if midx is invalid, packet is not for tty */ return 0; } info = &dev->mdm.info[midx]; #ifdef CONFIG_ISDN_AUDIO ifmt = 1; if (info->vonline) isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt); if ((info->vonline & 1) && (info->emu.vpar[1])) isdn_audio_calc_silence(info, skb->data, skb->len, ifmt); #endif if ((info->online < 2) #ifdef CONFIG_ISDN_AUDIO && (!(info->vonline & 1)) #endif ) { /* If Modem not listening, drop data */ SET_SKB_FREE(skb); kfree_skb(skb, FREE_READ); return 1; } if (info->emu.mdmreg[13] & 2) /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */ if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1))) skb_pull(skb, 4); #ifdef CONFIG_ISDN_AUDIO if (skb_headroom(skb) < sizeof(isdn_audio_skb)) { printk(KERN_WARNING "isdn_audio: insufficient skb_headroom, dropping\n"); SET_SKB_FREE(skb); kfree_skb(skb, FREE_READ); return 1; } ISDN_AUDIO_SKB_DLECOUNT(skb) = 0; ISDN_AUDIO_SKB_LOCK(skb) = 0; if (info->vonline & 1) { /* voice conversion/compression */ switch (info->emu.vpar[3]) { case 2: case 3: case 4: /* adpcm * Since compressed data takes less * space, we can overwrite the buffer. */ skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr, ifmt, skb->data, skb->data, skb->len)); break; case 5: /* a-law */ if (!ifmt) isdn_audio_ulaw2alaw(skb->data, skb->len); break; case 6: /* u-law */ if (ifmt) isdn_audio_alaw2ulaw(skb->data, skb->len); break; } ISDN_AUDIO_SKB_DLECOUNT(skb) = isdn_tty_countDLE(skb->data, skb->len); } #endif /* Try to deliver directly via tty-flip-buf if queue is empty */ save_flags(flags); cli(); if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) if (isdn_tty_try_read(info, skb)) { restore_flags(flags); return 1; } /* Direct deliver failed or queue wasn't empty. * Queue up for later dequeueing via timer-irq. */ __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb); dev->drv[di]->rcvcount[channel] += (skb->len #ifdef CONFIG_ISDN_AUDIO + ISDN_AUDIO_SKB_DLECOUNT(skb) #endif ); restore_flags(flags); /* Schedule dequeuing */ if ((dev->modempoll) && (info->rcvsched)) isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1); return 1; } 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))) { SET_SKB_FREE(skb); kfree_skb(skb, FREE_WRITE); } #ifdef CONFIG_ISDN_AUDIO if (skb_queue_len(&info->dtmf_queue)) while ((skb = skb_dequeue(&info->dtmf_queue))) { SET_SKB_FREE(skb); kfree_skb(skb, FREE_WRITE); } #endif 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) { /* Error: no channel, already shutdown, or wrong parameter */ SET_SKB_FREE(skb); dev_kfree_skb(skb, FREE_WRITE); return; } if (slen) skb_pull(skb, slen); skb_queue_head(&info->xmit_queue, skb); } #ifdef CONFIG_ISDN_AUDIO static 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; #ifdef ISDN_DEBUG_MODEM_VOICE printk(KERN_DEBUG "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n", info->line); #endif isdn_tty_at_cout("\020\003", info); if (!info->vonline) { #ifdef ISDN_DEBUG_MODEM_VOICE printk(KERN_DEBUG "DLEdown: send VCON on ttyI%d\n", info->line); #endif 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 ch; while (c--) { if (from_user) GET_USER(ch, buf); else ch = *buf; if ((ch != 0x11) && (ch != 0x13)) return 1; buf++; } return 0; } static int voice_cf[7] = {0, 0, 4, 3, 2, 0, 0}; #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) { int buflen; int skb_res; #ifdef CONFIG_ISDN_AUDIO int audio_len; #endif struct sk_buff *skb; unsigned long flags; #ifdef CONFIG_ISDN_AUDIO if (info->vonline & 4) { info->vonline &= ~6; if (!info->vonline) { #ifdef ISDN_DEBUG_MODEM_VOICE printk(KERN_DEBUG "senddown: send VCON on ttyI%d\n", info->line); #endif isdn_tty_at_cout("\r\nVCON\r\n", info); } } #endif save_flags(flags); cli(); if (!(buflen = info->xmit_count)) { restore_flags(flags); return; } if ((info->emu.mdmreg[12] & 0x10) != 0) info->msr &= ~UART_MSR_CTS; info->lsr &= ~UART_LSR_TEMT; 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) audio_len = buflen * voice_cf[info->emu.vpar[3]]; else audio_len = 0; skb = dev_alloc_skb(skb_res + buflen + audio_len); #else skb = dev_alloc_skb(skb_res + buflen); #endif if (!skb) { restore_flags(flags); printk(KERN_WARNING "isdn_tty: Out of memory in ttyI%d senddown\n", info->line); return; } skb_reserve(skb, skb_res); memcpy(skb_put(skb, buflen), info->xmit_buf, buflen); info->xmit_count = 0; restore_flags(flags); #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; /* voice conversion/decompression */ switch (info->emu.vpar[3]) { case 2: case 3: case 4: /* adpcm, compatible to ZyXel 1496 modem * with ROM revision 6.01 */ audio_len = isdn_audio_adpcm2xlaw(info->adpcms, ifmt, skb->data, skb_put(skb, audio_len), buflen); skb_pull(skb, buflen); skb_trim(skb, audio_len); break; case 5: /* a-law */ if (!ifmt) isdn_audio_alaw2ulaw(skb->data, buflen); break; case 6: /* u-law */ if (ifmt) isdn_audio_ulaw2alaw(skb->data, buflen); break; } } #endif /* CONFIG_ISDN_AUDIO */ SET_SKB_FREE(skb); 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); } /************************************************************ * * 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->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; info->last_dir = 1; strcpy(info->last_num, n); isdn_info_update(); restore_flags(flags); cmd.driver = info->isdn_driver; cmd.arg = info->isdn_channel; cmd.command = ISDN_CMD_CLREAZ; isdn_command(&cmd); strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver)); cmd.driver = info->isdn_driver; cmd.command = ISDN_CMD_SETEAZ; isdn_command(&cmd); cmd.driver = info->isdn_driver; cmd.command = ISDN_CMD_SETL2; info->last_l2 = l2; cmd.arg = info->isdn_channel + (l2 << 8); isdn_command(&cmd); cmd.driver = info->isdn_driver; cmd.command = ISDN_CMD_SETL3; cmd.arg = info->isdn_channel + (m->mdmreg[15] << 8); isdn_command(&cmd); cmd.driver = info->isdn_driver; cmd.arg = info->isdn_channel; sprintf(cmd.parm.setup.phone, "%s", n); sprintf(cmd.parm.setup.eazmsn, "%s", isdn_map_eaz2msn(m->msn, info->isdn_driver)); cmd.parm.setup.si1 = si; cmd.parm.setup.si2 = m->mdmreg[19]; cmd.command = ISDN_CMD_DIAL; info->dialing = 1; strcpy(dev->num[i], n); isdn_info_update(); isdn_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. */ static void isdn_tty_modem_hup(modem_info * info, int local) { 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; isdn_tty_flush_buffer(info->tty); if (info->online) { info->last_lhup = local; info->online = 0; /* NO CARRIER message */ isdn_tty_modem_result(3, info); } #ifdef CONFIG_ISDN_AUDIO info->vonline = 0; 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) { if (local) { cmd.driver = info->isdn_driver; cmd.command = ISDN_CMD_HANGUP; cmd.arg = info->isdn_channel; isdn_command(&cmd); } isdn_all_eaz(info->isdn_driver, info->isdn_channel); info->emu.mdmreg[1] = 0; 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, 0); isdn_tty_modem_hup(info, 1); } 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(); info->msr &= ~UART_MSR_RI; 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, 0); #ifdef ISDN_DEBUG_MODEM_HUP printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n"); #endif isdn_tty_modem_hup(info, 1); } } 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) #ifdef CONFIG_ISDN_AUDIO || (info->vonline & 3) #endif ) { atemu *m = &info->emu; #ifdef CONFIG_ISDN_AUDIO if (!info->vonline) #endif 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) { int cc = isdn_tty_handleDLEdown(info, m, c); if (info->vonline & 2) { if (!cc) { /* 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; } if ((info->vonline & 3) == 1) { /* Do NOT handle Ctrl-Q or Ctrl-S * when in full-duplex audio mode. */ if (isdn_tty_end_vrx(buf, c, from_user)) { info->vonline &= ~1; #ifdef ISDN_DEBUG_MODEM_VOICE printk(KERN_DEBUG "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n", info->line); #endif isdn_tty_at_cout("\020\003\r\nVCON\r\n", info); } } } 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; 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, 1); } 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); put_user(result, (uint *) value); return 0; } static int isdn_tty_get_modem_info(modem_info * info, uint * value) { u_char control, status; uint result; ulong flags; control = info->mcr; save_flags(flags); cli(); status = 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); put_user(result, (uint *) value); return 0; } static int isdn_tty_set_modem_info(modem_info * info, uint cmd, uint * value) { uint arg; int pre_dtr; GET_USER(arg, (uint *) value); 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, 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, 1); } } 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, 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, 1); } } 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 error = verify_area(VERIFY_WRITE, (void *) arg, sizeof(long)); if (error) return error; put_user(C_CLOCAL(tty) ? 1 : 0, (ulong *) arg); return 0; case TIOCSSOFTCAR: #ifdef ISDN_DEBUG_MODEM_IOCTL printk(KERN_DEBUG "ttyI%d ioctl TIOCSSOFTCAR\n", info->line); #endif error = verify_area(VERIFY_READ, (void *) arg, sizeof(long)); if (error) return error; GET_USER(arg, (ulong *) arg); 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 error = verify_area(VERIFY_WRITE, (void *) arg, sizeof(uint)); if (error) return error; return isdn_tty_get_modem_info(info, (uint *) arg); case TIOCMBIS: case TIOCMBIC: case TIOCMSET: error = verify_area(VERIFY_READ, (void *) arg, sizeof(uint)); if (error) return error; 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 error = verify_area(VERIFY_WRITE, (void *) arg, sizeof(uint)); if (error) return error; else 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'; } #ifdef CONFIG_ISDN_AUDIO 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 ) */ } #endif static void isdn_tty_modem_reset_regs(modem_info * info, int force) { atemu *m = &info->emu; if ((m->mdmreg[12] & 32) || force) { memcpy(m->mdmreg, m->profile, ISDN_MODEM_ANZREG); memcpy(m->msn, m->pmsn, ISDN_MSNLEN); info->xmit_size = m->mdmreg[16] * 16; } #ifdef CONFIG_ISDN_AUDIO isdn_tty_modem_reset_vpar(m); #endif 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]; sprintf(info->last_cause, "0000"); sprintf(info->last_num, "none"); info->last_dir = 0; info->last_lhup = 1; info->last_l2 = 0; info->last_si = 0; isdn_tty_reset_profile(&info->emu); isdn_tty_modem_reset_regs(info, 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); #ifdef CONFIG_ISDN_AUDIO skb_queue_head_init(&info->dtmf_queue); #endif if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 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, isdn_ctrl *c) { char *eaz; int ch = c->arg; setup_parm *setup = &c->parm.setup; int i; int idx; int si1; int si2; char nr[32]; ulong flags; save_flags(flags); cli(); if (!setup->phone[0]) { nr[0] = '0'; nr[1] = '\0'; printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n"); } else strcpy(nr, setup->phone); si1 = (int) setup->si1; si2 = (int) setup->si2; if (!setup->eazmsn[0]) { printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n"); eaz = "0"; } else eaz = setup->eazmsn; #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]; info->emu.mdmreg[21] = setup->plan; info->emu.mdmreg[22] = setup->screen; isdn_info_update(); restore_flags(flags); printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr, info->line); info->msr |= UART_MSR_RI; isdn_tty_modem_result(2, info); isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1); return info->line; } } } printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz, (dev->drv[di]->flags & DRV_FLAG_REJBUS) ? "rejected" : "ignored"); restore_flags(flags); return -1; } #define TTY_IS_ACTIVE(info) \ (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE)) int isdn_tty_stat_callback(int i, isdn_ctrl * c) { int mi; modem_info *info; if (i < 0) return 0; if ((mi = dev->m_idx[i]) >= 0) { info = &dev->mdm.info[mi]; switch (c->command) { case ISDN_STAT_BSENT: #ifdef ISDN_TTY_STAT_DEBUG printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line); #endif if ((info->isdn_driver == c->driver) && (info->isdn_channel == c->arg)) { info->msr |= UART_MSR_CTS; if (info->send_outstanding) if (!(--info->send_outstanding)) info->lsr |= UART_LSR_TEMT; isdn_tty_tint(info); return 1; } break; case ISDN_STAT_CAUSE: #ifdef ISDN_TTY_STAT_DEBUG printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line); #endif /* Signal cause to tty-device */ strncpy(info->last_cause, c->parm.num, 5); return 1; case ISDN_STAT_DCONN: #ifdef ISDN_TTY_STAT_DEBUG printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line); #endif if (TTY_IS_ACTIVE(info)) { if (info->dialing == 1) { info->dialing = 2; return 1; } } break; case ISDN_STAT_DHUP: #ifdef ISDN_TTY_STAT_DEBUG printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line); #endif if (TTY_IS_ACTIVE(info)) { if (info->dialing == 1) { info->dialing = 0; isdn_tty_modem_result(7, info); } #ifdef ISDN_DEBUG_MODEM_HUP printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n"); #endif isdn_tty_modem_hup(info, 0); return 1; } break; case ISDN_STAT_BCONN: #ifdef ISDN_TTY_STAT_DEBUG printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line); #endif /* Schedule CONNECT-Message to any tty * waiting for it and * set DCD-bit of its modem-status. */ if (TTY_IS_ACTIVE(info)) { info->msr |= UART_MSR_DCD; if (info->dialing) { info->dialing = 0; info->last_dir = 1; } else info->last_dir = 0; info->rcvsched = 1; if (USG_MODEM(dev->usage[i])) isdn_tty_modem_result(5, info); if (USG_VOICE(dev->usage[i])) isdn_tty_modem_result(11, info); return 1; } break; case ISDN_STAT_BHUP: #ifdef ISDN_TTY_STAT_DEBUG printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line); #endif if (TTY_IS_ACTIVE(info)) { #ifdef ISDN_DEBUG_MODEM_HUP printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n"); #endif isdn_tty_modem_hup(info, 0); return 1; } break; case ISDN_STAT_NODCH: #ifdef ISDN_TTY_STAT_DEBUG printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line); #endif if (TTY_IS_ACTIVE(info)) { if (info->dialing) { info->dialing = 0; info->last_l2 = -1; info->last_si = 0; sprintf(info->last_cause, "0000"); isdn_tty_modem_result(6, info); } info->msr &= ~UART_MSR_DCD; if (info->online) { isdn_tty_modem_result(3, info); info->online = 0; } return 1; } break; case ISDN_STAT_UNLOAD: #ifdef ISDN_TTY_STAT_DEBUG printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line); #endif for (i = 0; i < ISDN_MAX_CHANNELS; i++) { info = &dev->mdm.info[i]; if (info->isdn_driver == c->driver) { if (info->online) isdn_tty_modem_hup(info, 1); } } return 1; } } return 0; } /********************************************************************* 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_hup(info, 1); } } 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 */ static 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[10]; 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 */ #ifdef ISDN_DEBUG_MODEM_HUP printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n", (info->flags & ISDN_ASYNC_CLOSING), (!info->tty)); #endif save_flags(flags); cli(); m->mdmreg[1] = 0; del_timer(&info->nc_timer); info->ncarrier = 0; if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) { restore_flags(flags); return; } restore_flags(flags); #ifdef CONFIG_ISDN_AUDIO if (info->vonline & 1) { #ifdef ISDN_DEBUG_MODEM_VOICE printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n", info->line); #endif /* voice-recording, add DLE-ETX */ isdn_tty_at_cout("\020\003", info); } if (info->vonline & 2) { #ifdef ISDN_DEBUG_MODEM_VOICE printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n", info->line); #endif /* voice-playing, add DLE-DC4 */ isdn_tty_at_cout("\020\024", info); } #endif break; case 1: case 5: sprintf(info->last_cause, "0000"); if (!info->online) info->online = 2; break; case 11: #ifdef ISDN_DEBUG_MODEM_VOICE printk(KERN_DEBUG "res3: send VCON on ttyI%d\n", info->line); #endif sprintf(info->last_cause, "0000"); 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) && (!(m->mdmreg[13] & 16))) { 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); switch (code) { case 2: /* Print CID only once, _after_ 1.st RING */ if ((m->mdmreg[13] & 16) && (m->mdmreg[1] == 1)) { isdn_tty_at_cout("\r\n", info); isdn_tty_at_cout("CALLER NUMBER: ", info); isdn_tty_at_cout(dev->num[info->drv_index], info); } break; case 3: case 6: case 7: case 8: m->mdmreg[1] = 0; /* Append Cause-Message if enabled */ if (m->mdmreg[13] & 8) { sprintf(s, "/%s", info->last_cause); isdn_tty_at_cout(s, info); } break; case 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); break; } } 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 max) { int first = 1; max--; while (strchr("0123456789,#.*WPTS-", *p) && *p && (max > 0)) { if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first)) { *q++ = *p; max--; } 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; } static void isdn_tty_report(modem_info * info) { atemu *m = &info->emu; char s[80]; isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info); sprintf(s, " Remote Number: %s\r\n", info->last_num); isdn_tty_at_cout(s, info); sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming"); isdn_tty_at_cout(s, info); isdn_tty_at_cout(" Layer-2 Protocol: ", info); switch (info->last_l2) { case ISDN_PROTO_L2_X75I: isdn_tty_at_cout("x75i", info); break; case ISDN_PROTO_L2_X75UI: isdn_tty_at_cout("x75ui", info); break; case ISDN_PROTO_L2_X75BUI: isdn_tty_at_cout("x75bui", info); break; case ISDN_PROTO_L2_HDLC: isdn_tty_at_cout("hdlc", info); break; case ISDN_PROTO_L2_TRANS: isdn_tty_at_cout("transparent", info); break; default: isdn_tty_at_cout("unknown", info); break; } isdn_tty_at_cout((m->mdmreg[13] & 2) ? "/t.70\r\n" : "\r\n", info); isdn_tty_at_cout(" Service: ", info); switch (info->last_si) { case 1: isdn_tty_at_cout("audio\r\n", info); break; case 5: isdn_tty_at_cout("btx\r\n", info); break; case 7: isdn_tty_at_cout("data\r\n", info); break; default: sprintf(s, "%d\r\n", info->last_si); isdn_tty_at_cout(s, info); break; } sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote"); isdn_tty_at_cout(s, info); sprintf(s, " Last cause: %s\r\n", info->last_cause); isdn_tty_at_cout(s, info); } /* * 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_MAX)) 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(info, 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]++; isdn_tty_at_cout("\r\n", info); for (i = 0; i < ISDN_MODEM_ANZREG; i++) { sprintf(rb, "S%02d=%03d%s", i, m->mdmreg[i], ((i + 1) % 10) ? " " : "\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; } static int isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m) { /* Some plausibility checks */ switch (mreg) { case 14: if (mval > ISDN_PROTO_L2_TRANS) return 1; break; case 16: if ((mval * 16) > ISDN_SERIAL_XMIT_MAX) return 1; #ifdef CONFIG_ISDN_AUDIO if ((m->mdmreg[18] & 1) && (mval > VBUFX)) return 1; #endif info->xmit_size = mval * 16; break; case 20: case 21: case 22: /* readonly registers */ return 1; } return 0; } /* * Perform ATS command */ static int isdn_tty_cmd_ATS(char **p, modem_info * info) { atemu *m = &info->emu; int bitpos; int mreg; int mval; int bval; 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; if (isdn_tty_check_ats(mreg, mval, info, m)) PARSE_ERROR1; m->mdmreg[mreg] = mval; break; case '.': /* Set/Clear a single bit */ p[0]++; bitpos = isdn_getnum(p); if ((bitpos < 0) || (bitpos > 7)) PARSE_ERROR1; switch (*p[0]) { case '=': p[0]++; bval = isdn_getnum(p); if (bval < 0 || bval > 1) PARSE_ERROR1; if (bval) mval = m->mdmreg[mreg] | (1 << bitpos); else mval = m->mdmreg[mreg] & ~(1 << bitpos); if (isdn_tty_check_ats(mreg, mval, info, m)) PARSE_ERROR1; m->mdmreg[mreg] = mval; break; case '?': p[0]++; isdn_tty_at_cout("\r\n", info); isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0", info); break; default: PARSE_ERROR1; } 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 */ info->last_dir = 0; strcpy(info->last_num, dev->num[info->drv_index]); 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; else l2 = 0; } #endif cmd.driver = info->isdn_driver; cmd.command = ISDN_CMD_SETL2; cmd.arg = info->isdn_channel + (l2 << 8); info->last_l2 = l2; isdn_command(&cmd); cmd.driver = info->isdn_driver; cmd.command = ISDN_CMD_SETL3; cmd.arg = info->isdn_channel + (m->mdmreg[15] << 8); isdn_command(&cmd); cmd.driver = info->isdn_driver; cmd.arg = info->isdn_channel; cmd.command = ISDN_CMD_ACCEPTD; isdn_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; } info->silence_state = isdn_audio_silence_init(info->silence_state); if (!info->silence_state) { printk(KERN_WARNING "isdn_tty: Couldn't malloc silence 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; } } #ifdef ISDN_DEBUG_AT printk(KERN_DEBUG "AT: +VRX\n"); #endif info->vonline |= 1; isdn_tty_modem_result(1, info); return 0; 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]++; if ((*p[0]>='0') && (*p[0]<='9')) { 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; } else if (*p[0] == '?') { p[0]++; isdn_tty_at_cout("\r\n<0-31>,<0-255>", info); break; } else 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; } } #ifdef ISDN_DEBUG_AT printk(KERN_DEBUG "AT: +VTX\n"); #endif m->lastDLE = 0; info->vonline |= 2; isdn_tty_modem_result(1, info); return 0; 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,sizeof(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 PARSE_ERROR; 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; case '2': p++; isdn_tty_report(info); 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(info, 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; default: PARSE_ERROR; } break; #endif /* CONFIG_ISDN_AUDIO */ case '&': p++; if (isdn_tty_cmd_ATand(&p, info)) return; break; default: PARSE_ERROR; } } #ifdef CONFIG_ISDN_AUDIO if (!info->vonline) #endif 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); }
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