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4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 | /* $Id: isdn_tty.c,v 1.63 1999/04/12 12:33:39 fritz Exp $ * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel). * * Copyright 1994-1999 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: isdn_tty.c,v $ * Revision 1.63 1999/04/12 12:33:39 fritz * Changes from 2.0 tree. * * Revision 1.62 1999/03/02 12:04:48 armin * -added ISDN_STAT_ADDCH to increase supported channels after * register_isdn(). * -ttyI now goes on-hook on ATZ when B-Ch is connected. * -added timer-function for register S7 (Wait for Carrier). * -analog modem (ISDN_PROTO_L2_MODEM) implementations. * -on L2_MODEM a string will be appended to the CONNECT-Message, * which is provided by the HL-Driver in parm.num in ISDN_STAT_BCONN. * -variable "dialing" used for ATA also, for interrupting call * establishment and register S7. * * Revision 1.61 1999/01/27 22:53:11 he * minor updates (spellings, jiffies wrap around in isdn_tty) * * Revision 1.60 1998/11/15 23:57:32 keil * changes for 2.1.127 * * Revision 1.59 1998/08/20 13:50:15 keil * More support for hybrid modem (not working yet) * * Revision 1.58 1998/07/26 18:48:45 armin * Added silence detection in voice receive mode. * * Revision 1.57 1998/06/26 15:12:36 fritz * Added handling of STAT_ICALL with incomplete CPN. * Added AT&L for ttyI emulator. * Added more locking stuff in tty_write. * * Revision 1.56 1998/06/18 23:31:51 fritz * Replaced cli()/restore_flags() in isdn_tty_write() by locking. * Removed direct-senddown feature in isdn_tty_write because it will * never succeed with locking and is useless anyway. * * Revision 1.55 1998/06/17 19:50:55 he * merged with 2.1.10[34] (cosmetics and udelay() -> mdelay()) * brute force fix to avoid Ugh's in isdn_tty_write() * cleaned up some dead code * * Revision 1.54 1998/06/07 00:20:13 fritz * abc cleanup. * * Revision 1.53 1998/06/02 12:10:16 detabc * wegen einer einstweiliger verfuegung gegen DW ist zur zeit * die abc-extension bis zur klaerung der rechtslage nicht verfuegbar * * Revision 1.52 1998/03/19 13:18:21 keil * Start of a CAPI like interface for supplementary Service * first service: SUSPEND * * Revision 1.51 1998/03/08 14:26:11 detabc * change kfree_skb to dev_kfree_skb * remove SET_SKB_FREE * * Revision 1.50 1998/03/08 13:14:28 detabc * abc-extension support for kernels > 2.1.x * first try (sorry experimental) * * Revision 1.49 1998/03/08 00:01:59 fritz * Bugfix: Lowlevel module usage and channel usage were not * reset on NO DCHANNEL. * * Revision 1.48 1998/03/07 12:28:15 tsbogend * fixed kernel unaligned traps on Linux/Alpha * * Revision 1.47 1998/02/22 19:44:14 fritz * Bugfixes and improvements regarding V.110, V.110 now running. * * Revision 1.46 1998/02/20 17:23:08 fritz * Changes for recent kernels. * Merged in contributions by Thomas Pfeiffer (V.110 T.70+ Extended FAX stuff) * Added symbolic constants for Modem-Registers. * * Revision 1.45 1998/01/31 22:07:49 keil * changes for newer kernels * * Revision 1.44 1998/01/31 19:30:02 calle * Merged changes from and for 2.1.82, not tested only compiled ... * * Revision 1.43 1997/10/09 21:29:04 fritz * New HL<->LL interface: * New BSENT callback with nr. of bytes included. * Sending without ACK. * New L1 error status (not yet in use). * Cleaned up obsolete structures. * Implemented Cisco-SLARP. * Changed local net-interface data to be dynamically allocated. * Removed old 2.0 compatibility stuff. * * Revision 1.42 1997/10/01 09:20:49 fritz * Removed old compatibility stuff for 2.0.X kernels. * From now on, this code is for 2.1.X ONLY! * Old stuff is still in the separate branch. * * 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 #define FIX_FILE_TRANSFER /* 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: 1.63 $"; #define DLE 0x10 #define ETX 0x03 #define DC4 0x14 /* * Definition of some special Registers of AT-Emulator */ #define REG_RINGATA 0 #define REG_RINGCNT 1 #define REG_ESC 2 #define REG_CR 3 #define REG_LF 4 #define REG_BS 5 #define REG_WAITC 7 #define REG_RESP 12 #define BIT_RESP 1 #define REG_RESPNUM 12 #define BIT_RESPNUM 2 #define REG_ECHO 12 #define BIT_ECHO 4 #define REG_DCD 12 #define BIT_DCD 8 #define REG_CTS 12 #define BIT_CTS 16 #define REG_DTRR 12 #define BIT_DTRR 32 #define REG_DSR 12 #define BIT_DSR 64 #define REG_CPPP 12 #define BIT_CPPP 128 #define REG_T70 13 #define BIT_T70 2 #define BIT_T70_EXT 32 #define REG_DTRHUP 13 #define BIT_DTRHUP 4 #define REG_RESPXT 13 #define BIT_RESPXT 8 #define REG_CIDONCE 13 #define BIT_CIDONCE 16 #define REG_RUNG 13 #define BIT_RUNG 64 #define REG_RESRXT 13 #define BIT_RESRXT 128 #define REG_L2PROT 14 #define REG_L3PROT 15 #define REG_PSIZE 16 #define REG_WSIZE 17 #define REG_SI1 18 #define REG_SI2 19 #define REG_SI1I 20 #define REG_PLAN 21 #define REG_SCREEN 22 /* 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[REG_CPPP] & BIT_CPPP) tty->flip.flag_buf_ptr[len - 1] = 0xff; queue_task(&tty->flip.tqueue, &tq_timer); kfree_skb(skb); 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[REG_CPPP] & BIT_CPPP)) 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 */ kfree_skb(skb); return 1; } if (info->emu.mdmreg[REG_T70] & BIT_T70) { if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) { /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */ if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */ skb_pull(skb, 4); else if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */ skb_pull(skb, 2); } else /* 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"); kfree_skb(skb); 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))) kfree_skb(skb); #ifdef CONFIG_ISDN_AUDIO if (skb_queue_len(&info->dtmf_queue)) while ((skb = skb_dequeue(&info->dtmf_queue))) kfree_skb(skb); #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, 1, 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 */ dev_kfree_skb(skb); return; } 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; #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 if (!(buflen = info->xmit_count)) return; if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0) info->msr &= ~UART_MSR_CTS; info->lsr &= ~UART_LSR_TEMT; /* info->xmit_count is modified here and in isdn_tty_write(). * So we return here if isdn_tty_write() is in the * critical section. */ atomic_inc(&info->xmit_lock); if (!(atomic_dec_and_test(&info->xmit_lock))) return; if (info->isdn_driver < 0) { info->xmit_count = 0; 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) { 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; #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 */ if (info->emu.mdmreg[REG_T70] & BIT_T70) { /* Add T.70 simplified header */ if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) memcpy(skb_push(skb, 2), "\1\0", 2); else 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[REG_L2PROT]; isdn_ctrl cmd; ulong flags; int i; int j; for (j = 7; j >= 0; j--) if (m->mdmreg[REG_SI1] & (1 << j)) { si = bit2si[j]; break; } #ifdef CONFIG_ISDN_AUDIO if ((si == 1) && (l2 != ISDN_PROTO_L2_MODEM)) { l2 = ISDN_PROTO_L2_TRANS; usg = ISDN_USAGE_VOICE; } #endif m->mdmreg[REG_SI1I] = si2bit[si]; save_flags(flags); cli(); i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -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[REG_L3PROT] << 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[REG_SI2]; cmd.command = ISDN_CMD_DIAL; info->dialing = 1; info->emu.carrierwait = 0; strcpy(dev->num[i], n); isdn_info_update(); isdn_command(&cmd); isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1); } } /* 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->silence_state) { kfree(info->silence_state); info->silence_state = NULL; } if (info->adpcms) { kfree(info->adpcms); info->adpcms = NULL; } if (info->adpcmr) { kfree(info->adpcmr); info->adpcmr = NULL; } #endif if ((info->msr & UART_MSR_RI) && (info->emu.mdmreg[REG_RUNG] & BIT_RUNG)) isdn_tty_modem_result(12, info); 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[REG_RINGCNT] = 0; usage = ((info->emu.mdmreg[REG_SI1I] != 1) || (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM)) ? ISDN_USAGE_MODEM : ISDN_USAGE_VOICE; 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; } } /* * Begin of a CAPI like interface, currently used only for * supplementary service (CAPI 2.0 part III) */ #include "avmb1/capicmd.h" /* this should be moved in a common place */ int isdn_tty_capi_facility(capi_msg *cm) { return(-1); /* dummy */ } /* isdn_tty_suspend() tries to suspend the current tty connection */ static void isdn_tty_suspend(char *id, modem_info * info, atemu * m) { isdn_ctrl cmd; int l; if (!info) return; #ifdef ISDN_DEBUG_MODEM_SERVICES printk(KERN_DEBUG "Msusp ttyI%d\n", info->line); #endif l = strlen(id); if ((info->isdn_driver >= 0) && l) { cmd.parm.cmsg.Length = l+17; cmd.parm.cmsg.Command = CAPI_FACILITY; cmd.parm.cmsg.Subcommand = CAPI_REQ; cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1; cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */ cmd.parm.cmsg.para[1] = 0; cmd.parm.cmsg.para[2] = l + 3; cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */ cmd.parm.cmsg.para[4] = 0; cmd.parm.cmsg.para[5] = l; strncpy(&cmd.parm.cmsg.para[6], id, l); cmd.command = CAPI_PUT_MESSAGE; cmd.driver = info->isdn_driver; cmd.arg = info->isdn_channel; isdn_command(&cmd); } } /* isdn_tty_resume() tries to resume a suspended call * setup of the lower levels before that. unfortunatly here is no * checking for compatibility of used protocols implemented by Q931 * It does the same things like isdn_tty_dial, the last command * is different, may be we can merge it. */ static void isdn_tty_resume(char *id, modem_info * info, atemu * m) { int usg = ISDN_USAGE_MODEM; int si = 7; int l2 = m->mdmreg[REG_L2PROT]; isdn_ctrl cmd; ulong flags; int i; int j; int l; l = strlen(id); if (!l) { isdn_tty_modem_result(4, info); return; } for (j = 7; j >= 0; j--) if (m->mdmreg[REG_SI1] & (1 << j)) { si = bit2si[j]; break; } #ifdef CONFIG_ISDN_AUDIO if ((si == 1) && (l2 != ISDN_PROTO_L2_MODEM)) { l2 = ISDN_PROTO_L2_TRANS; usg = ISDN_USAGE_VOICE; } #endif m->mdmreg[REG_SI1I] = si2bit[si]; save_flags(flags); cli(); i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -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[REG_L3PROT] << 8); isdn_command(&cmd); cmd.driver = info->isdn_driver; cmd.arg = info->isdn_channel; cmd.parm.cmsg.Length = l+17; cmd.parm.cmsg.Command = CAPI_FACILITY; cmd.parm.cmsg.Subcommand = CAPI_REQ; cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1; cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */ cmd.parm.cmsg.para[1] = 0; cmd.parm.cmsg.para[2] = l+3; cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */ cmd.parm.cmsg.para[4] = 0; cmd.parm.cmsg.para[5] = l; strncpy(&cmd.parm.cmsg.para[6], id, l); cmd.command =CAPI_PUT_MESSAGE; /* info->dialing = 1; strcpy(dev->num[i], n); isdn_info_update(); */ isdn_command(&cmd); } } /* isdn_tty_send_msg() sends a message to a HL driver * This is used for hybrid modem cards to send AT commands to it */ static void isdn_tty_send_msg(modem_info * info, atemu * m, char *msg) { int usg = ISDN_USAGE_MODEM; int si = 7; int l2 = m->mdmreg[REG_L2PROT]; isdn_ctrl cmd; ulong flags; int i; int j; int l; l = strlen(msg); if (!l) { isdn_tty_modem_result(4, info); return; } for (j = 7; j >= 0; j--) if (m->mdmreg[REG_SI1] & (1 << j)) { si = bit2si[j]; break; } #ifdef CONFIG_ISDN_AUDIO if ((si == 1) && (l2 != ISDN_PROTO_L2_MODEM)) { l2 = ISDN_PROTO_L2_TRANS; usg = ISDN_USAGE_VOICE; } #endif m->mdmreg[REG_SI1I] = si2bit[si]; save_flags(flags); cli(); i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -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; 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[REG_L3PROT] << 8); isdn_command(&cmd); cmd.driver = info->isdn_driver; cmd.arg = info->isdn_channel; cmd.parm.cmsg.Length = l+14; cmd.parm.cmsg.Command = CAPI_MANUFACTURER; cmd.parm.cmsg.Subcommand = CAPI_REQ; cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1; cmd.parm.cmsg.para[0] = l+1; strncpy(&cmd.parm.cmsg.para[1], msg, l); cmd.parm.cmsg.para[l+1] = 0xd; cmd.command =CAPI_PUT_MESSAGE; /* info->dialing = 1; strcpy(dev->num[i], n); isdn_info_update(); */ isdn_command(&cmd); } } 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[REG_DTRHUP] & BIT_DTRHUP) { #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[REG_DTRHUP] & BIT_DTRHUP) { 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; int total = 0; 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; if (from_user) down(&info->write_sem); /* See isdn_tty_senddown() */ atomic_inc(&info->xmit_lock); 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[REG_ESC], 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; } 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); atomic_dec(&info->xmit_lock); if (from_user) up(&info->write_sem); 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[REG_DTRHUP] & BIT_DTRHUP) { 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[REG_DTRHUP] & BIT_DTRHUP) { 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) { #if LINUX_VERSION_CODE < 131841 struct wait_queue wait = {current, NULL}; #else DECLARE_WAITQUEUE(wait, NULL); #endif 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 (signal_pending(current)) { 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; schedule_timeout(20); if (time_after(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; schedule_timeout(50); 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'; m->plmsn[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[REG_DTRR] & BIT_DTRR) || force) { memcpy(m->mdmreg, m->profile, ISDN_MODEM_ANZREG); memcpy(m->msn, m->pmsn, ISDN_MSNLEN); memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN); info->xmit_size = m->mdmreg[REG_PSIZE] * 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); memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN); 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; m->tty_modem.driver_name = "isdn_tty"; /* * 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]; #if LINUX_VERSION_CODE < 131841 info->write_sem = MUTEX; #else init_MUTEX(&info->write_sem); #endif sprintf(info->last_cause, "0000"); sprintf(info->last_num, "none"); info->last_dir = 0; info->last_lhup = 1; info->last_l2 = -1; 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; #if LINUX_VERSION_CODE < 131841 info->open_wait = 0; info->close_wait = 0; #else init_waitqueue_head(&info->open_wait); init_waitqueue_head(&info->close_wait); #endif 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; } static int isdn_tty_match_icall(char *cid, atemu *emu, int di) { #ifdef ISDN_DEBUG_MODEM_ICALL printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n", emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di), emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]); #endif if (strlen(emu->lmsn)) { char *p = emu->lmsn; char *q; int tmp; int ret = 0; while (1) { if ((q = strchr(p, ';'))) *q = '\0'; if ((tmp = isdn_wildmat(cid, isdn_map_eaz2msn(p, di))) > ret) ret = tmp; #ifdef ISDN_DEBUG_MODEM_ICALL printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n", p, isdn_map_eaz2msn(emu->msn, di), tmp); #endif if (q) { *q = ';'; p = q; p++; } if (!tmp) return 0; if (!q) break; } return ret; } else return isdn_wildmat(cid, isdn_map_eaz2msn(emu->msn, di)); } /* * An incoming call-request has arrived. * Search the tty-devices for an appropriate device and bind * it to the ISDN-Channel. * Return: * * 0 = No matching device found. * 1 = A matching device found. * 3 = No match found, but eventually would match, if * CID is longer. */ int isdn_tty_find_icall(int di, int ch, setup_parm setup) { char *eaz; int i; int wret; int idx; int si1; int si2; char nr[32]; ulong flags; 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 wret = 0; save_flags(flags); cli(); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { modem_info *info = &dev->mdm.info[i]; if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */ (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */ 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 ( #ifndef FIX_FILE_TRANSFER (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) && #endif (info->isdn_driver == -1) && (info->isdn_channel == -1) && (USG_NONE(dev->usage[idx]))) { int matchret; if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret) wret = matchret; if (!matchret) { /* EAZ is matching */ 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) || (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM)) ? ISDN_USAGE_MODEM : ISDN_USAGE_VOICE; strcpy(dev->num[idx], nr); strcpy(info->emu.cpn, eaz); info->emu.mdmreg[REG_SI1I] = si2bit[si1]; info->emu.mdmreg[REG_PLAN] = setup.plan; info->emu.mdmreg[REG_SCREEN] = 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 1; } } } } restore_flags(flags); printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz, ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored"); return (wret == 2)?3:0; } #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; char *e; if (i < 0) return 0; if ((mi = dev->m_idx[i]) >= 0) { info = &dev->mdm.info[mi]; switch (c->command) { case ISDN_STAT_CINF: printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num); info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10); if (e == (char *)c->parm.num) info->emu.charge = 0; break; 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) isdn_tty_modem_result(7, info); if (info->dialing > 1) isdn_tty_modem_result(3, info); info->dialing = 0; #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; info->emu.charge = 0; if (info->dialing & 0xf) info->last_dir = 1; else info->last_dir = 0; info->dialing = 0; info->rcvsched = 1; if (USG_MODEM(dev->usage[i])) { if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) { strcpy(info->emu.connmsg, c->parm.num); isdn_tty_modem_result(1, info); } else 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); } isdn_tty_modem_hup(info, 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[REG_CR]; break; case '\n': c = m->mdmreg[REG_LF]; break; case '\b': c = m->mdmreg[REG_BS]; 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", "RUNG"}; ulong flags; char s[ISDN_MSNLEN+10]; switch (code) { case 2: m->mdmreg[REG_RINGCNT]++; /* RING */ if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA]) /* 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[REG_RINGCNT] = 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[REG_RESP] & BIT_RESP) { /* Show results */ isdn_tty_at_cout("\r\n", info); if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) { /* Show numeric results */ sprintf(s, "%d", code); isdn_tty_at_cout(s, info); } else { if ((code == 2) && (m->mdmreg[REG_RUNG] & BIT_RUNG) && (m->mdmreg[REG_RINGCNT] > 1)) return; if ((code == 2) && (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE))) { 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 1: switch (m->mdmreg[REG_L2PROT]) { case ISDN_PROTO_L2_MODEM: isdn_tty_at_cout(" ", info); isdn_tty_at_cout(m->connmsg, info); break; } break; case 2: /* Append CPN, if enabled */ if ((m->mdmreg[REG_RESRXT] & BIT_RESRXT)) { sprintf(s, "/%s", m->cpn); isdn_tty_at_cout(s, info); } /* Print CID only once, _after_ 1.st RING */ if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) && (m->mdmreg[REG_RINGCNT] == 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[REG_RINGCNT] = 0; /* Append Cause-Message if enabled */ if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) { sprintf(s, "/%s", info->last_cause); isdn_tty_at_cout(s, info); } break; case 5: /* Append Protocol to CONNECT message */ switch (m->mdmreg[REG_L2PROT]) { case ISDN_PROTO_L2_X75I: case ISDN_PROTO_L2_X75UI: case ISDN_PROTO_L2_X75BUI: isdn_tty_at_cout("/X.75", info); break; case ISDN_PROTO_L2_HDLC: isdn_tty_at_cout("/HDLC", info); break; case ISDN_PROTO_L2_V11096: isdn_tty_at_cout("/V110/9600", info); break; case ISDN_PROTO_L2_V11019: isdn_tty_at_cout("/V110/19200", info); break; case ISDN_PROTO_L2_V11038: isdn_tty_at_cout("/V110/38400", info); break; } if (m->mdmreg[REG_T70] & BIT_T70) { isdn_tty_at_cout("/T.70", info); if (m->mdmreg[REG_T70] & BIT_T70_EXT) isdn_tty_at_cout("+", 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') || /* Why a comma ??? */ (*p[0] == ',')) *n++ = *p[0]++; *n = '\0'; } /* * Get phone-number from modem-commandbuffer */ static void isdn_tty_getdial(char *p, char *q,int cnt) { int first = 1; int limit=39; /* MUST match the size in isdn_tty_parse to avoid buffer overflow */ while (strchr("0123456789,#.*WPTS-", *p) && *p && --cnt>0) { if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first)) *q++ = *p; p++; if(!--limit) break; 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("X.75i", info); break; case ISDN_PROTO_L2_X75UI: isdn_tty_at_cout("X.75ui", info); break; case ISDN_PROTO_L2_X75BUI: isdn_tty_at_cout("X.75bui", info); break; case ISDN_PROTO_L2_HDLC: isdn_tty_at_cout("HDLC", info); break; case ISDN_PROTO_L2_V11096: isdn_tty_at_cout("V.110 9600 Baud", info); break; case ISDN_PROTO_L2_V11019: isdn_tty_at_cout("V.110 19200 Baud", info); break; case ISDN_PROTO_L2_V11038: isdn_tty_at_cout("V.110 38400 Baud", info); break; case ISDN_PROTO_L2_TRANS: isdn_tty_at_cout("transparent", info); break; case ISDN_PROTO_L2_MODEM: isdn_tty_at_cout("modem", info); break; default: isdn_tty_at_cout("unknown", info); break; } if (m->mdmreg[REG_T70] & BIT_T70) { isdn_tty_at_cout("/T.70", info); if (m->mdmreg[REG_T70] & BIT_T70_EXT) isdn_tty_at_cout("+", info); } isdn_tty_at_cout("\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]; #define MAXRB (sizeof(rb) - 1) 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[REG_SI1] & 1) && (i > VBUF)) PARSE_ERROR1; #endif m->mdmreg[REG_PSIZE] = i / 16; info->xmit_size = m->mdmreg[REG_PSIZE] * 16; switch (m->mdmreg[REG_L2PROT]) { case ISDN_PROTO_L2_V11096: case ISDN_PROTO_L2_V11019: case ISDN_PROTO_L2_V11038: info->xmit_size /= 10; } break; case 'D': /* &D - Set DCD-Low-behavior */ p[0]++; switch (isdn_getnum(p)) { case 0: m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP; m->mdmreg[REG_DTRR] &= ~BIT_DTRR; break; case 2: m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP; m->mdmreg[REG_DTRR] &= ~BIT_DTRR; break; case 3: m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP; m->mdmreg[REG_DTRR] |= BIT_DTRR; 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 'L': /* &L -Set Numbers to listen on */ p[0]++; i = 0; while ((strchr("0123456789,*[]?;", *p[0])) && (i < ISDN_LMSNLEN)) m->lmsn[i++] = *p[0]++; m->lmsn[i] = '\0'; break; case 'R': /* &R - Set V.110 bitrate adaption */ p[0]++; i = isdn_getnum(p); switch (i) { case 0: /* Switch off V.110, back to X.75 */ m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; m->mdmreg[REG_SI2] = 0; info->xmit_size = m->mdmreg[REG_PSIZE] * 16; break; case 9600: m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096; m->mdmreg[REG_SI2] = 197; info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10; break; case 19200: m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019; m->mdmreg[REG_SI2] = 199; info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10; break; case 38400: m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038; m->mdmreg[REG_SI2] = 198; /* no existing standard for this */ info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10; break; default: PARSE_ERROR1; } /* Switch off T.70 */ m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT); /* Set Service 7 */ m->mdmreg[REG_SI1] |= 4; break; case 'S': /* &S - Set Windowsize */ p[0]++; i = isdn_getnum(p); if ((i > 0) && (i < 9)) m->mdmreg[REG_WSIZE] = 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: %.50s\r\n", strlen(m->msn) ? m->msn : "None"); isdn_tty_at_cout(rb, info); if (strlen(m->lmsn)) { isdn_tty_at_cout("\r\nListen: ", info); isdn_tty_at_cout(m->lmsn, info); isdn_tty_at_cout("\r\n", 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 and T.70 */ p[0]++; switch (isdn_getnum(p)) { case 0: m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT); info->xmit_size = m->mdmreg[REG_PSIZE] * 16; break; case 1: m->mdmreg[REG_T70] |= BIT_T70; m->mdmreg[REG_T70] &= ~BIT_T70_EXT; m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; info->xmit_size = 112; m->mdmreg[REG_SI1] = 4; m->mdmreg[REG_SI2] = 0; break; case 2: m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT); m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; info->xmit_size = 112; m->mdmreg[REG_SI1] = 4; m->mdmreg[REG_SI2] = 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 REG_L2PROT: if (mval > ISDN_PROTO_L2_MAX) return 1; break; case REG_PSIZE: if ((mval * 16) > ISDN_SERIAL_XMIT_MAX) return 1; #ifdef CONFIG_ISDN_AUDIO if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX)) return 1; #endif info->xmit_size = mval * 16; switch (m->mdmreg[REG_L2PROT]) { case ISDN_PROTO_L2_V11096: case ISDN_PROTO_L2_V11019: case ISDN_PROTO_L2_V11038: info->xmit_size /= 10; } break; case REG_SI1I: case REG_PLAN: case REG_SCREEN: /* 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[REG_RINGCNT] = 0; info->msr &= ~UART_MSR_RI; l2 = m->mdmreg[REG_L2PROT]; #ifdef CONFIG_ISDN_AUDIO /* If more than one bit set in reg18, autoselect Layer2 */ if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) { if (m->mdmreg[REG_SI1I] == 1) { if (l2 != ISDN_PROTO_L2_MODEM) l2 = ISDN_PROTO_L2_TRANS; } else l2 = ISDN_PROTO_L2_X75I; } #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[REG_L3PROT] << 8); isdn_command(&cmd); cmd.driver = info->isdn_driver; cmd.arg = info->isdn_channel; cmd.command = ISDN_CMD_ACCEPTD; info->dialing = 16; info->emu.carrierwait = 0; isdn_command(&cmd); isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1); } 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[REG_SI1] & 1) ? 8 : 0); isdn_tty_at_cout(rs, info); break; case '=': p[0]++; switch (*p[0]) { case '0': p[0]++; m->mdmreg[REG_SI1] = 4; info->xmit_size = m->mdmreg[REG_PSIZE] * 16; break; case '2': printk(KERN_DEBUG "isdn_tty: FCLASS=2\n"); p[0]++; break; case '8': p[0]++; m->mdmreg[REG_SI1] = 5; info->xmit_size = VBUF; break; case '?': p[0]++; isdn_tty_at_cout("\r\n0,2,8", 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[REG_RINGATA]); isdn_tty_at_cout(rs, info); break; case '=': p[0]++; par = isdn_getnum(p); if ((par < 0) || (par > 255)) PARSE_ERROR1; m->mdmreg[REG_RINGATA] = par; break; default: PARSE_ERROR1; } return 0; } if (!strncmp(p[0], "TBC=", 4)) { /* UNKLAR !! */ p[0] += 4; printk(KERN_DEBUG "isdn_tty: Fax FTBC=%c\n", *p[0]); switch (*p[0]) { case '0': p[0]++; break; default: PARSE_ERROR1; } return 0; } if (!strncmp(p[0], "BOR=", 4)) { /* UNKLAR !! */ p[0] += 4; printk(KERN_DEBUG "isdn_tty: Fax FBOR=%c\n", *p[0]); switch (*p[0]) { case '0': p[0]++; break; default: PARSE_ERROR1; } return 0; } if (!strncmp(p[0], "DCC=", 4)) { /* SETUP irgendwie !! */ int i, val[]={0,0,0,0,0,0,0,0}; p[0] += 4; if (*p[0] == '?') { isdn_tty_at_cout("\r\n(0,1),(0-5),(0-2),(0-2),(0,1),(0),(0),(0-7)",info); p[0]++; } else { for (i=0; (*p[0]>='0') && (*p[0]<='9'); i++) { val[i] = *p[0] - 48; p[0]++; if (*p[0] == ',') p[0]++; } printk(KERN_DEBUG "isdn_tty: Fax Setup values=%d,%d,%d,%d,%d,%d,%d,%d\n", val[0], val[1], val[2], val[3], val[4], val[5], val[6], val[7]); } return 0; } if (!strncmp(p[0], "LID=", 4)) { /* set sender ID !! */ char senderID[80]; int i; p[0] += 4; if (*p[0] =='"') p[0]++; for(i=0; (*p[0]) && (*p[0] != '"'); i++) senderID[i] = *p[0]++; senderID[i] = 0; if (*p[0] =='"') p[0]++; printk(KERN_DEBUG "isdn_tty: Fax sender=>%s<\n", senderID); return 0; } if (!strncmp(p[0], "MFR?", 4)) { p[0] += 4; printk(KERN_DEBUG "isdn_tty: FMFR?\n"); isdn_tty_at_cout("\r\nISDNfax", info); return 0; } if (!strncmp(p[0], "MDL?", 4)) { p[0] += 4; printk(KERN_DEBUG "isdn_tty: FMDL?\n"); isdn_tty_at_cout("\r\nAVM-B1", info); return 0; } if (!strncmp(p[0], "AP=?", 4)) { p[0] += 4; printk(KERN_DEBUG "isdn_tty: FAP=?\n"); return 0; } if (!strncmp(p[0], "PHCTO=", 6)) { /* beim trace mit dem zyxel folgt der wert 30 ;*/ p[0] += 6; printk(KERN_DEBUG "isdn_tty: FPHCTO=%s\n", p[0]); return 0; } if (!strncmp(p[0], "CR=", 3)) { p[0] += 3; printk(KERN_DEBUG "isdn_tty: FCR=%s\n", p[0]); return 0; } printk(KERN_DEBUG "isdn_tty: unknown token=>AT+F%s<\n", p[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[REG_ECHO] &= ~BIT_ECHO; break; case 1: m->mdmreg[REG_ECHO] |= BIT_ECHO; 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; case '3': p++; sprintf(ds, "\r\n%d", info->emu.charge); isdn_tty_at_cout(ds, 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((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? 1:5, 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[REG_RESP] |= BIT_RESP; break; case 1: m->mdmreg[REG_RESP] &= ~BIT_RESP; 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[REG_RESP] |= BIT_RESPNUM; break; case 1: m->mdmreg[REG_RESP] &= ~BIT_RESPNUM; break; default: PARSE_ERROR; } break; case 'Z': /* Z - Load Registers from Profile */ p++; if (info->msr & UART_MSR_DCD) { info->online = 0; isdn_tty_on_hook(info); } isdn_tty_modem_reset_regs(info, 1); break; case '+': p++; switch (*p) { #ifdef CONFIG_ISDN_AUDIO case 'F': p++; if (isdn_tty_cmd_PLUSF(&p, info)) return; break; case 'V': if ((!(m->mdmreg[REG_SI1] & 1)) || (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM)) PARSE_ERROR; p++; if (isdn_tty_cmd_PLUSV(&p, info)) return; break; #endif /* CONFIG_ISDN_AUDIO */ case 'S': /* SUSPEND */ p++; isdn_tty_get_msnstr(ds, &p); isdn_tty_suspend(ds, info, m); break; case 'R': /* RESUME */ isdn_tty_get_msnstr(ds, &p); isdn_tty_resume(ds, info, m); case 'M': /* MESSAGE */ p++; isdn_tty_send_msg(info, m, p); break; default: PARSE_ERROR; } break; 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[REG_CR] || c == m->mdmreg[REG_LF]) { /* Separator (CR oder LF) */ m->mdmcmd[m->mdmcmdl] = 0; if (m->mdmreg[REG_ECHO] & BIT_ECHO) { 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[REG_BS] && m->mdmreg[REG_BS] < 128) { /* Backspace-Funktion */ if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) { if (m->mdmcmdl) m->mdmcmdl--; if (m->mdmreg[REG_ECHO] & BIT_ECHO) isdn_tty_at_cout("\b", info); } continue; } if (cmdchar(c)) { if (m->mdmreg[REG_ECHO] & BIT_ECHO) { 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); } /* * Check all channels if we have a 'no carrier' timeout. * Timeout value is set by Register S7. */ void isdn_tty_carrier_timeout(void) { int ton = 0; int i; for (i = 0; i < ISDN_MAX_CHANNELS; i++) { modem_info *info = &dev->mdm.info[i]; if (info->dialing) { if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) { info->dialing = 0; isdn_tty_modem_result(3, info); isdn_tty_modem_hup(info, 1); } else ton = 1; } } isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton); } |