isdn_tty.c revision 6caa76b7786891b42b66a0e61e2c2fff2c884620
1/* $Id: isdn_tty.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $ 2 * 3 * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel). 4 * 5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de) 6 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg 7 * 8 * This software may be used and distributed according to the terms 9 * of the GNU General Public License, incorporated herein by reference. 10 * 11 */ 12#undef ISDN_TTY_STAT_DEBUG 13 14#include <linux/isdn.h> 15#include <linux/slab.h> 16#include <linux/delay.h> 17#include <linux/mutex.h> 18#include "isdn_common.h" 19#include "isdn_tty.h" 20#ifdef CONFIG_ISDN_AUDIO 21#include "isdn_audio.h" 22#define VBUF 0x3e0 23#define VBUFX (VBUF/16) 24#endif 25 26#define FIX_FILE_TRANSFER 27#define DUMMY_HAYES_AT 28 29/* Prototypes */ 30 31static DEFINE_MUTEX(modem_info_mutex); 32static int isdn_tty_edit_at(const char *, int, modem_info *); 33static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *); 34static void isdn_tty_modem_reset_regs(modem_info *, int); 35static void isdn_tty_cmd_ATA(modem_info *); 36static void isdn_tty_flush_buffer(struct tty_struct *); 37static void isdn_tty_modem_result(int, modem_info *); 38#ifdef CONFIG_ISDN_AUDIO 39static int isdn_tty_countDLE(unsigned char *, int); 40#endif 41 42/* Leave this unchanged unless you know what you do! */ 43#define MODEM_PARANOIA_CHECK 44#define MODEM_DO_RESTART 45 46static int bit2si[8] = 47{1, 5, 7, 7, 7, 7, 7, 7}; 48static int si2bit[8] = 49{4, 1, 4, 4, 4, 4, 4, 4}; 50 51char *isdn_tty_revision = "$Revision: 1.1.2.3 $"; 52 53 54/* isdn_tty_try_read() is called from within isdn_tty_rcv_skb() 55 * to stuff incoming data directly into a tty's flip-buffer. This 56 * is done to speed up tty-receiving if the receive-queue is empty. 57 * This routine MUST be called with interrupts off. 58 * Return: 59 * 1 = Success 60 * 0 = Failure, data has to be buffered and later processed by 61 * isdn_tty_readmodem(). 62 */ 63static int 64isdn_tty_try_read(modem_info * info, struct sk_buff *skb) 65{ 66 int c; 67 int len; 68 struct tty_struct *tty; 69 char last; 70 71 if (info->online) { 72 if ((tty = info->tty)) { 73 if (info->mcr & UART_MCR_RTS) { 74 len = skb->len 75#ifdef CONFIG_ISDN_AUDIO 76 + ISDN_AUDIO_SKB_DLECOUNT(skb) 77#endif 78 ; 79 80 c = tty_buffer_request_room(tty, len); 81 if (c >= len) { 82#ifdef CONFIG_ISDN_AUDIO 83 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) { 84 int l = skb->len; 85 unsigned char *dp = skb->data; 86 while (--l) { 87 if (*dp == DLE) 88 tty_insert_flip_char(tty, DLE, 0); 89 tty_insert_flip_char(tty, *dp++, 0); 90 } 91 if (*dp == DLE) 92 tty_insert_flip_char(tty, DLE, 0); 93 last = *dp; 94 } else { 95#endif 96 if(len > 1) 97 tty_insert_flip_string(tty, skb->data, len - 1); 98 last = skb->data[len - 1]; 99#ifdef CONFIG_ISDN_AUDIO 100 } 101#endif 102 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP) 103 tty_insert_flip_char(tty, last, 0xFF); 104 else 105 tty_insert_flip_char(tty, last, TTY_NORMAL); 106 tty_flip_buffer_push(tty); 107 kfree_skb(skb); 108 return 1; 109 } 110 } 111 } 112 } 113 return 0; 114} 115 116/* isdn_tty_readmodem() is called periodically from within timer-interrupt. 117 * It tries getting received data from the receive queue an stuff it into 118 * the tty's flip-buffer. 119 */ 120void 121isdn_tty_readmodem(void) 122{ 123 int resched = 0; 124 int midx; 125 int i; 126 int r; 127 struct tty_struct *tty; 128 modem_info *info; 129 130 for (i = 0; i < ISDN_MAX_CHANNELS; i++) { 131 if ((midx = dev->m_idx[i]) >= 0) { 132 info = &dev->mdm.info[midx]; 133 if (info->online) { 134 r = 0; 135#ifdef CONFIG_ISDN_AUDIO 136 isdn_audio_eval_dtmf(info); 137 if ((info->vonline & 1) && (info->emu.vpar[1])) 138 isdn_audio_eval_silence(info); 139#endif 140 if ((tty = info->tty)) { 141 if (info->mcr & UART_MCR_RTS) { 142 /* CISCO AsyncPPP Hack */ 143 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP)) 144 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0); 145 else 146 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1); 147 if (r) 148 tty_flip_buffer_push(tty); 149 } else 150 r = 1; 151 } else 152 r = 1; 153 if (r) { 154 info->rcvsched = 0; 155 resched = 1; 156 } else 157 info->rcvsched = 1; 158 } 159 } 160 } 161 if (!resched) 162 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0); 163} 164 165int 166isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb) 167{ 168 ulong flags; 169 int midx; 170#ifdef CONFIG_ISDN_AUDIO 171 int ifmt; 172#endif 173 modem_info *info; 174 175 if ((midx = dev->m_idx[i]) < 0) { 176 /* if midx is invalid, packet is not for tty */ 177 return 0; 178 } 179 info = &dev->mdm.info[midx]; 180#ifdef CONFIG_ISDN_AUDIO 181 ifmt = 1; 182 183 if ((info->vonline) && (!info->emu.vpar[4])) 184 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt); 185 if ((info->vonline & 1) && (info->emu.vpar[1])) 186 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt); 187#endif 188 if ((info->online < 2) 189#ifdef CONFIG_ISDN_AUDIO 190 && (!(info->vonline & 1)) 191#endif 192 ) { 193 /* If Modem not listening, drop data */ 194 kfree_skb(skb); 195 return 1; 196 } 197 if (info->emu.mdmreg[REG_T70] & BIT_T70) { 198 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) { 199 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */ 200 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */ 201 skb_pull(skb, 4); 202 else 203 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */ 204 skb_pull(skb, 2); 205 } else 206 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */ 207 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1))) 208 skb_pull(skb, 4); 209 } 210#ifdef CONFIG_ISDN_AUDIO 211 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0; 212 ISDN_AUDIO_SKB_LOCK(skb) = 0; 213 if (info->vonline & 1) { 214 /* voice conversion/compression */ 215 switch (info->emu.vpar[3]) { 216 case 2: 217 case 3: 218 case 4: 219 /* adpcm 220 * Since compressed data takes less 221 * space, we can overwrite the buffer. 222 */ 223 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr, 224 ifmt, 225 skb->data, 226 skb->data, 227 skb->len)); 228 break; 229 case 5: 230 /* a-law */ 231 if (!ifmt) 232 isdn_audio_ulaw2alaw(skb->data, skb->len); 233 break; 234 case 6: 235 /* u-law */ 236 if (ifmt) 237 isdn_audio_alaw2ulaw(skb->data, skb->len); 238 break; 239 } 240 ISDN_AUDIO_SKB_DLECOUNT(skb) = 241 isdn_tty_countDLE(skb->data, skb->len); 242 } 243#ifdef CONFIG_ISDN_TTY_FAX 244 else { 245 if (info->faxonline & 2) { 246 isdn_tty_fax_bitorder(info, skb); 247 ISDN_AUDIO_SKB_DLECOUNT(skb) = 248 isdn_tty_countDLE(skb->data, skb->len); 249 } 250 } 251#endif 252#endif 253 /* Try to deliver directly via tty-buf if queue is empty */ 254 spin_lock_irqsave(&info->readlock, flags); 255 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) 256 if (isdn_tty_try_read(info, skb)) { 257 spin_unlock_irqrestore(&info->readlock, flags); 258 return 1; 259 } 260 /* Direct deliver failed or queue wasn't empty. 261 * Queue up for later dequeueing via timer-irq. 262 */ 263 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb); 264 dev->drv[di]->rcvcount[channel] += 265 (skb->len 266#ifdef CONFIG_ISDN_AUDIO 267 + ISDN_AUDIO_SKB_DLECOUNT(skb) 268#endif 269 ); 270 spin_unlock_irqrestore(&info->readlock, flags); 271 /* Schedule dequeuing */ 272 if ((dev->modempoll) && (info->rcvsched)) 273 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1); 274 return 1; 275} 276 277static void 278isdn_tty_cleanup_xmit(modem_info * info) 279{ 280 skb_queue_purge(&info->xmit_queue); 281#ifdef CONFIG_ISDN_AUDIO 282 skb_queue_purge(&info->dtmf_queue); 283#endif 284} 285 286static void 287isdn_tty_tint(modem_info * info) 288{ 289 struct sk_buff *skb = skb_dequeue(&info->xmit_queue); 290 int len, slen; 291 292 if (!skb) 293 return; 294 len = skb->len; 295 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver, 296 info->isdn_channel, 1, skb)) == len) { 297 struct tty_struct *tty = info->tty; 298 info->send_outstanding++; 299 info->msr &= ~UART_MSR_CTS; 300 info->lsr &= ~UART_LSR_TEMT; 301 tty_wakeup(tty); 302 return; 303 } 304 if (slen < 0) { 305 /* Error: no channel, already shutdown, or wrong parameter */ 306 dev_kfree_skb(skb); 307 return; 308 } 309 skb_queue_head(&info->xmit_queue, skb); 310} 311 312#ifdef CONFIG_ISDN_AUDIO 313static int 314isdn_tty_countDLE(unsigned char *buf, int len) 315{ 316 int count = 0; 317 318 while (len--) 319 if (*buf++ == DLE) 320 count++; 321 return count; 322} 323 324/* This routine is called from within isdn_tty_write() to perform 325 * DLE-decoding when sending audio-data. 326 */ 327static int 328isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len) 329{ 330 unsigned char *p = &info->xmit_buf[info->xmit_count]; 331 int count = 0; 332 333 while (len > 0) { 334 if (m->lastDLE) { 335 m->lastDLE = 0; 336 switch (*p) { 337 case DLE: 338 /* Escape code */ 339 if (len > 1) 340 memmove(p, p + 1, len - 1); 341 p--; 342 count++; 343 break; 344 case ETX: 345 /* End of data */ 346 info->vonline |= 4; 347 return count; 348 case DC4: 349 /* Abort RX */ 350 info->vonline &= ~1; 351#ifdef ISDN_DEBUG_MODEM_VOICE 352 printk(KERN_DEBUG 353 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n", 354 info->line); 355#endif 356 isdn_tty_at_cout("\020\003", info); 357 if (!info->vonline) { 358#ifdef ISDN_DEBUG_MODEM_VOICE 359 printk(KERN_DEBUG 360 "DLEdown: send VCON on ttyI%d\n", 361 info->line); 362#endif 363 isdn_tty_at_cout("\r\nVCON\r\n", info); 364 } 365 /* Fall through */ 366 case 'q': 367 case 's': 368 /* Silence */ 369 if (len > 1) 370 memmove(p, p + 1, len - 1); 371 p--; 372 break; 373 } 374 } else { 375 if (*p == DLE) 376 m->lastDLE = 1; 377 else 378 count++; 379 } 380 p++; 381 len--; 382 } 383 if (len < 0) { 384 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n"); 385 return 0; 386 } 387 return count; 388} 389 390/* This routine is called from within isdn_tty_write() when receiving 391 * audio-data. It interrupts receiving, if an character other than 392 * ^S or ^Q is sent. 393 */ 394static int 395isdn_tty_end_vrx(const char *buf, int c) 396{ 397 char ch; 398 399 while (c--) { 400 ch = *buf; 401 if ((ch != 0x11) && (ch != 0x13)) 402 return 1; 403 buf++; 404 } 405 return 0; 406} 407 408static int voice_cf[7] = 409{0, 0, 4, 3, 2, 0, 0}; 410 411#endif /* CONFIG_ISDN_AUDIO */ 412 413/* isdn_tty_senddown() is called either directly from within isdn_tty_write() 414 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls 415 * outgoing data from the tty's xmit-buffer, handles voice-decompression or 416 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint. 417 */ 418static void 419isdn_tty_senddown(modem_info * info) 420{ 421 int buflen; 422 int skb_res; 423#ifdef CONFIG_ISDN_AUDIO 424 int audio_len; 425#endif 426 struct sk_buff *skb; 427 428#ifdef CONFIG_ISDN_AUDIO 429 if (info->vonline & 4) { 430 info->vonline &= ~6; 431 if (!info->vonline) { 432#ifdef ISDN_DEBUG_MODEM_VOICE 433 printk(KERN_DEBUG 434 "senddown: send VCON on ttyI%d\n", 435 info->line); 436#endif 437 isdn_tty_at_cout("\r\nVCON\r\n", info); 438 } 439 } 440#endif 441 if (!(buflen = info->xmit_count)) 442 return; 443 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0) 444 info->msr &= ~UART_MSR_CTS; 445 info->lsr &= ~UART_LSR_TEMT; 446 /* info->xmit_count is modified here and in isdn_tty_write(). 447 * So we return here if isdn_tty_write() is in the 448 * critical section. 449 */ 450 atomic_inc(&info->xmit_lock); 451 if (!(atomic_dec_and_test(&info->xmit_lock))) 452 return; 453 if (info->isdn_driver < 0) { 454 info->xmit_count = 0; 455 return; 456 } 457 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4; 458#ifdef CONFIG_ISDN_AUDIO 459 if (info->vonline & 2) 460 audio_len = buflen * voice_cf[info->emu.vpar[3]]; 461 else 462 audio_len = 0; 463 skb = dev_alloc_skb(skb_res + buflen + audio_len); 464#else 465 skb = dev_alloc_skb(skb_res + buflen); 466#endif 467 if (!skb) { 468 printk(KERN_WARNING 469 "isdn_tty: Out of memory in ttyI%d senddown\n", 470 info->line); 471 return; 472 } 473 skb_reserve(skb, skb_res); 474 memcpy(skb_put(skb, buflen), info->xmit_buf, buflen); 475 info->xmit_count = 0; 476#ifdef CONFIG_ISDN_AUDIO 477 if (info->vonline & 2) { 478 /* For now, ifmt is fixed to 1 (alaw), since this 479 * is used with ISDN everywhere in the world, except 480 * US, Canada and Japan. 481 * Later, when US-ISDN protocols are implemented, 482 * this setting will depend on the D-channel protocol. 483 */ 484 int ifmt = 1; 485 486 /* voice conversion/decompression */ 487 switch (info->emu.vpar[3]) { 488 case 2: 489 case 3: 490 case 4: 491 /* adpcm, compatible to ZyXel 1496 modem 492 * with ROM revision 6.01 493 */ 494 audio_len = isdn_audio_adpcm2xlaw(info->adpcms, 495 ifmt, 496 skb->data, 497 skb_put(skb, audio_len), 498 buflen); 499 skb_pull(skb, buflen); 500 skb_trim(skb, audio_len); 501 break; 502 case 5: 503 /* a-law */ 504 if (!ifmt) 505 isdn_audio_alaw2ulaw(skb->data, 506 buflen); 507 break; 508 case 6: 509 /* u-law */ 510 if (ifmt) 511 isdn_audio_ulaw2alaw(skb->data, 512 buflen); 513 break; 514 } 515 } 516#endif /* CONFIG_ISDN_AUDIO */ 517 if (info->emu.mdmreg[REG_T70] & BIT_T70) { 518 /* Add T.70 simplified header */ 519 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) 520 memcpy(skb_push(skb, 2), "\1\0", 2); 521 else 522 memcpy(skb_push(skb, 4), "\1\0\1\0", 4); 523 } 524 skb_queue_tail(&info->xmit_queue, skb); 525} 526 527/************************************************************ 528 * 529 * Modem-functions 530 * 531 * mostly "stolen" from original Linux-serial.c and friends. 532 * 533 ************************************************************/ 534 535/* The next routine is called once from within timer-interrupt 536 * triggered within isdn_tty_modem_ncarrier(). It calls 537 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message 538 * into the tty's buffer. 539 */ 540static void 541isdn_tty_modem_do_ncarrier(unsigned long data) 542{ 543 modem_info *info = (modem_info *) data; 544 isdn_tty_modem_result(RESULT_NO_CARRIER, info); 545} 546 547/* Next routine is called, whenever the DTR-signal is raised. 548 * It checks the ncarrier-flag, and triggers the above routine 549 * when necessary. The ncarrier-flag is set, whenever DTR goes 550 * low. 551 */ 552static void 553isdn_tty_modem_ncarrier(modem_info * info) 554{ 555 if (info->ncarrier) { 556 info->nc_timer.expires = jiffies + HZ; 557 add_timer(&info->nc_timer); 558 } 559} 560 561/* 562 * return the usage calculated by si and layer 2 protocol 563 */ 564static int 565isdn_calc_usage(int si, int l2) 566{ 567 int usg = ISDN_USAGE_MODEM; 568 569#ifdef CONFIG_ISDN_AUDIO 570 if (si == 1) { 571 switch(l2) { 572 case ISDN_PROTO_L2_MODEM: 573 usg = ISDN_USAGE_MODEM; 574 break; 575#ifdef CONFIG_ISDN_TTY_FAX 576 case ISDN_PROTO_L2_FAX: 577 usg = ISDN_USAGE_FAX; 578 break; 579#endif 580 case ISDN_PROTO_L2_TRANS: 581 default: 582 usg = ISDN_USAGE_VOICE; 583 break; 584 } 585 } 586#endif 587 return(usg); 588} 589 590/* isdn_tty_dial() performs dialing of a tty an the necessary 591 * setup of the lower levels before that. 592 */ 593static void 594isdn_tty_dial(char *n, modem_info * info, atemu * m) 595{ 596 int usg = ISDN_USAGE_MODEM; 597 int si = 7; 598 int l2 = m->mdmreg[REG_L2PROT]; 599 u_long flags; 600 isdn_ctrl cmd; 601 int i; 602 int j; 603 604 for (j = 7; j >= 0; j--) 605 if (m->mdmreg[REG_SI1] & (1 << j)) { 606 si = bit2si[j]; 607 break; 608 } 609 usg = isdn_calc_usage(si, l2); 610#ifdef CONFIG_ISDN_AUDIO 611 if ((si == 1) && 612 (l2 != ISDN_PROTO_L2_MODEM) 613#ifdef CONFIG_ISDN_TTY_FAX 614 && (l2 != ISDN_PROTO_L2_FAX) 615#endif 616 ) { 617 l2 = ISDN_PROTO_L2_TRANS; 618 usg = ISDN_USAGE_VOICE; 619 } 620#endif 621 m->mdmreg[REG_SI1I] = si2bit[si]; 622 spin_lock_irqsave(&dev->lock, flags); 623 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn); 624 if (i < 0) { 625 spin_unlock_irqrestore(&dev->lock, flags); 626 isdn_tty_modem_result(RESULT_NO_DIALTONE, info); 627 } else { 628 info->isdn_driver = dev->drvmap[i]; 629 info->isdn_channel = dev->chanmap[i]; 630 info->drv_index = i; 631 dev->m_idx[i] = info->line; 632 dev->usage[i] |= ISDN_USAGE_OUTGOING; 633 info->last_dir = 1; 634 strcpy(info->last_num, n); 635 isdn_info_update(); 636 spin_unlock_irqrestore(&dev->lock, flags); 637 cmd.driver = info->isdn_driver; 638 cmd.arg = info->isdn_channel; 639 cmd.command = ISDN_CMD_CLREAZ; 640 isdn_command(&cmd); 641 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver)); 642 cmd.driver = info->isdn_driver; 643 cmd.command = ISDN_CMD_SETEAZ; 644 isdn_command(&cmd); 645 cmd.driver = info->isdn_driver; 646 cmd.command = ISDN_CMD_SETL2; 647 info->last_l2 = l2; 648 cmd.arg = info->isdn_channel + (l2 << 8); 649 isdn_command(&cmd); 650 cmd.driver = info->isdn_driver; 651 cmd.command = ISDN_CMD_SETL3; 652 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8); 653#ifdef CONFIG_ISDN_TTY_FAX 654 if (l2 == ISDN_PROTO_L2_FAX) { 655 cmd.parm.fax = info->fax; 656 info->fax->direction = ISDN_TTY_FAX_CONN_OUT; 657 } 658#endif 659 isdn_command(&cmd); 660 cmd.driver = info->isdn_driver; 661 cmd.arg = info->isdn_channel; 662 sprintf(cmd.parm.setup.phone, "%s", n); 663 sprintf(cmd.parm.setup.eazmsn, "%s", 664 isdn_map_eaz2msn(m->msn, info->isdn_driver)); 665 cmd.parm.setup.si1 = si; 666 cmd.parm.setup.si2 = m->mdmreg[REG_SI2]; 667 cmd.command = ISDN_CMD_DIAL; 668 info->dialing = 1; 669 info->emu.carrierwait = 0; 670 strcpy(dev->num[i], n); 671 isdn_info_update(); 672 isdn_command(&cmd); 673 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1); 674 } 675} 676 677/* isdn_tty_hangup() disassociates a tty from the real 678 * ISDN-line (hangup). The usage-status is cleared 679 * and some cleanup is done also. 680 */ 681void 682isdn_tty_modem_hup(modem_info * info, int local) 683{ 684 isdn_ctrl cmd; 685 int di, ch; 686 687 if (!info) 688 return; 689 690 di = info->isdn_driver; 691 ch = info->isdn_channel; 692 if (di < 0 || ch < 0) 693 return; 694 695 info->isdn_driver = -1; 696 info->isdn_channel = -1; 697 698#ifdef ISDN_DEBUG_MODEM_HUP 699 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line); 700#endif 701 info->rcvsched = 0; 702 isdn_tty_flush_buffer(info->tty); 703 if (info->online) { 704 info->last_lhup = local; 705 info->online = 0; 706 isdn_tty_modem_result(RESULT_NO_CARRIER, info); 707 } 708#ifdef CONFIG_ISDN_AUDIO 709 info->vonline = 0; 710#ifdef CONFIG_ISDN_TTY_FAX 711 info->faxonline = 0; 712 info->fax->phase = ISDN_FAX_PHASE_IDLE; 713#endif 714 info->emu.vpar[4] = 0; 715 info->emu.vpar[5] = 8; 716 kfree(info->dtmf_state); 717 info->dtmf_state = NULL; 718 kfree(info->silence_state); 719 info->silence_state = NULL; 720 kfree(info->adpcms); 721 info->adpcms = NULL; 722 kfree(info->adpcmr); 723 info->adpcmr = NULL; 724#endif 725 if ((info->msr & UART_MSR_RI) && 726 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG)) 727 isdn_tty_modem_result(RESULT_RUNG, info); 728 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI); 729 info->lsr |= UART_LSR_TEMT; 730 731 if (local) { 732 cmd.driver = di; 733 cmd.command = ISDN_CMD_HANGUP; 734 cmd.arg = ch; 735 isdn_command(&cmd); 736 } 737 738 isdn_all_eaz(di, ch); 739 info->emu.mdmreg[REG_RINGCNT] = 0; 740 isdn_free_channel(di, ch, 0); 741 742 if (info->drv_index >= 0) { 743 dev->m_idx[info->drv_index] = -1; 744 info->drv_index = -1; 745 } 746} 747 748/* 749 * Begin of a CAPI like interface, currently used only for 750 * supplementary service (CAPI 2.0 part III) 751 */ 752#include <linux/isdn/capicmd.h> 753 754int 755isdn_tty_capi_facility(capi_msg *cm) { 756 return(-1); /* dummy */ 757} 758 759/* isdn_tty_suspend() tries to suspend the current tty connection 760 */ 761static void 762isdn_tty_suspend(char *id, modem_info * info, atemu * m) 763{ 764 isdn_ctrl cmd; 765 766 int l; 767 768 if (!info) 769 return; 770 771#ifdef ISDN_DEBUG_MODEM_SERVICES 772 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line); 773#endif 774 l = strlen(id); 775 if ((info->isdn_driver >= 0)) { 776 cmd.parm.cmsg.Length = l+18; 777 cmd.parm.cmsg.Command = CAPI_FACILITY; 778 cmd.parm.cmsg.Subcommand = CAPI_REQ; 779 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1; 780 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */ 781 cmd.parm.cmsg.para[1] = 0; 782 cmd.parm.cmsg.para[2] = l + 3; 783 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */ 784 cmd.parm.cmsg.para[4] = 0; 785 cmd.parm.cmsg.para[5] = l; 786 strncpy(&cmd.parm.cmsg.para[6], id, l); 787 cmd.command = CAPI_PUT_MESSAGE; 788 cmd.driver = info->isdn_driver; 789 cmd.arg = info->isdn_channel; 790 isdn_command(&cmd); 791 } 792} 793 794/* isdn_tty_resume() tries to resume a suspended call 795 * setup of the lower levels before that. unfortunatly here is no 796 * checking for compatibility of used protocols implemented by Q931 797 * It does the same things like isdn_tty_dial, the last command 798 * is different, may be we can merge it. 799 */ 800 801static void 802isdn_tty_resume(char *id, modem_info * info, atemu * m) 803{ 804 int usg = ISDN_USAGE_MODEM; 805 int si = 7; 806 int l2 = m->mdmreg[REG_L2PROT]; 807 isdn_ctrl cmd; 808 ulong flags; 809 int i; 810 int j; 811 int l; 812 813 l = strlen(id); 814 for (j = 7; j >= 0; j--) 815 if (m->mdmreg[REG_SI1] & (1 << j)) { 816 si = bit2si[j]; 817 break; 818 } 819 usg = isdn_calc_usage(si, l2); 820#ifdef CONFIG_ISDN_AUDIO 821 if ((si == 1) && 822 (l2 != ISDN_PROTO_L2_MODEM) 823#ifdef CONFIG_ISDN_TTY_FAX 824 && (l2 != ISDN_PROTO_L2_FAX) 825#endif 826 ) { 827 l2 = ISDN_PROTO_L2_TRANS; 828 usg = ISDN_USAGE_VOICE; 829 } 830#endif 831 m->mdmreg[REG_SI1I] = si2bit[si]; 832 spin_lock_irqsave(&dev->lock, flags); 833 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn); 834 if (i < 0) { 835 spin_unlock_irqrestore(&dev->lock, flags); 836 isdn_tty_modem_result(RESULT_NO_DIALTONE, info); 837 } else { 838 info->isdn_driver = dev->drvmap[i]; 839 info->isdn_channel = dev->chanmap[i]; 840 info->drv_index = i; 841 dev->m_idx[i] = info->line; 842 dev->usage[i] |= ISDN_USAGE_OUTGOING; 843 info->last_dir = 1; 844// strcpy(info->last_num, n); 845 isdn_info_update(); 846 spin_unlock_irqrestore(&dev->lock, flags); 847 cmd.driver = info->isdn_driver; 848 cmd.arg = info->isdn_channel; 849 cmd.command = ISDN_CMD_CLREAZ; 850 isdn_command(&cmd); 851 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver)); 852 cmd.driver = info->isdn_driver; 853 cmd.command = ISDN_CMD_SETEAZ; 854 isdn_command(&cmd); 855 cmd.driver = info->isdn_driver; 856 cmd.command = ISDN_CMD_SETL2; 857 info->last_l2 = l2; 858 cmd.arg = info->isdn_channel + (l2 << 8); 859 isdn_command(&cmd); 860 cmd.driver = info->isdn_driver; 861 cmd.command = ISDN_CMD_SETL3; 862 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8); 863 isdn_command(&cmd); 864 cmd.driver = info->isdn_driver; 865 cmd.arg = info->isdn_channel; 866 cmd.parm.cmsg.Length = l+18; 867 cmd.parm.cmsg.Command = CAPI_FACILITY; 868 cmd.parm.cmsg.Subcommand = CAPI_REQ; 869 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1; 870 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */ 871 cmd.parm.cmsg.para[1] = 0; 872 cmd.parm.cmsg.para[2] = l+3; 873 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */ 874 cmd.parm.cmsg.para[4] = 0; 875 cmd.parm.cmsg.para[5] = l; 876 strncpy(&cmd.parm.cmsg.para[6], id, l); 877 cmd.command =CAPI_PUT_MESSAGE; 878 info->dialing = 1; 879// strcpy(dev->num[i], n); 880 isdn_info_update(); 881 isdn_command(&cmd); 882 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1); 883 } 884} 885 886/* isdn_tty_send_msg() sends a message to a HL driver 887 * This is used for hybrid modem cards to send AT commands to it 888 */ 889 890static void 891isdn_tty_send_msg(modem_info * info, atemu * m, char *msg) 892{ 893 int usg = ISDN_USAGE_MODEM; 894 int si = 7; 895 int l2 = m->mdmreg[REG_L2PROT]; 896 isdn_ctrl cmd; 897 ulong flags; 898 int i; 899 int j; 900 int l; 901 902 l = strlen(msg); 903 if (!l) { 904 isdn_tty_modem_result(RESULT_ERROR, info); 905 return; 906 } 907 for (j = 7; j >= 0; j--) 908 if (m->mdmreg[REG_SI1] & (1 << j)) { 909 si = bit2si[j]; 910 break; 911 } 912 usg = isdn_calc_usage(si, l2); 913#ifdef CONFIG_ISDN_AUDIO 914 if ((si == 1) && 915 (l2 != ISDN_PROTO_L2_MODEM) 916#ifdef CONFIG_ISDN_TTY_FAX 917 && (l2 != ISDN_PROTO_L2_FAX) 918#endif 919 ) { 920 l2 = ISDN_PROTO_L2_TRANS; 921 usg = ISDN_USAGE_VOICE; 922 } 923#endif 924 m->mdmreg[REG_SI1I] = si2bit[si]; 925 spin_lock_irqsave(&dev->lock, flags); 926 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn); 927 if (i < 0) { 928 spin_unlock_irqrestore(&dev->lock, flags); 929 isdn_tty_modem_result(RESULT_NO_DIALTONE, info); 930 } else { 931 info->isdn_driver = dev->drvmap[i]; 932 info->isdn_channel = dev->chanmap[i]; 933 info->drv_index = i; 934 dev->m_idx[i] = info->line; 935 dev->usage[i] |= ISDN_USAGE_OUTGOING; 936 info->last_dir = 1; 937 isdn_info_update(); 938 spin_unlock_irqrestore(&dev->lock, flags); 939 cmd.driver = info->isdn_driver; 940 cmd.arg = info->isdn_channel; 941 cmd.command = ISDN_CMD_CLREAZ; 942 isdn_command(&cmd); 943 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver)); 944 cmd.driver = info->isdn_driver; 945 cmd.command = ISDN_CMD_SETEAZ; 946 isdn_command(&cmd); 947 cmd.driver = info->isdn_driver; 948 cmd.command = ISDN_CMD_SETL2; 949 info->last_l2 = l2; 950 cmd.arg = info->isdn_channel + (l2 << 8); 951 isdn_command(&cmd); 952 cmd.driver = info->isdn_driver; 953 cmd.command = ISDN_CMD_SETL3; 954 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8); 955 isdn_command(&cmd); 956 cmd.driver = info->isdn_driver; 957 cmd.arg = info->isdn_channel; 958 cmd.parm.cmsg.Length = l+14; 959 cmd.parm.cmsg.Command = CAPI_MANUFACTURER; 960 cmd.parm.cmsg.Subcommand = CAPI_REQ; 961 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1; 962 cmd.parm.cmsg.para[0] = l+1; 963 strncpy(&cmd.parm.cmsg.para[1], msg, l); 964 cmd.parm.cmsg.para[l+1] = 0xd; 965 cmd.command =CAPI_PUT_MESSAGE; 966/* info->dialing = 1; 967 strcpy(dev->num[i], n); 968 isdn_info_update(); 969*/ 970 isdn_command(&cmd); 971 } 972} 973 974static inline int 975isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine) 976{ 977#ifdef MODEM_PARANOIA_CHECK 978 if (!info) { 979 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n", 980 name, routine); 981 return 1; 982 } 983 if (info->magic != ISDN_ASYNC_MAGIC) { 984 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n", 985 name, routine); 986 return 1; 987 } 988#endif 989 return 0; 990} 991 992/* 993 * This routine is called to set the UART divisor registers to match 994 * the specified baud rate for a serial port. 995 */ 996static void 997isdn_tty_change_speed(modem_info * info) 998{ 999 uint cflag, 1000 cval, 1001 fcr, 1002 quot; 1003 int i; 1004 1005 if (!info->tty || !info->tty->termios) 1006 return; 1007 cflag = info->tty->termios->c_cflag; 1008 1009 quot = i = cflag & CBAUD; 1010 if (i & CBAUDEX) { 1011 i &= ~CBAUDEX; 1012 if (i < 1 || i > 2) 1013 info->tty->termios->c_cflag &= ~CBAUDEX; 1014 else 1015 i += 15; 1016 } 1017 if (quot) { 1018 info->mcr |= UART_MCR_DTR; 1019 isdn_tty_modem_ncarrier(info); 1020 } else { 1021 info->mcr &= ~UART_MCR_DTR; 1022 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) { 1023#ifdef ISDN_DEBUG_MODEM_HUP 1024 printk(KERN_DEBUG "Mhup in changespeed\n"); 1025#endif 1026 if (info->online) 1027 info->ncarrier = 1; 1028 isdn_tty_modem_reset_regs(info, 0); 1029 isdn_tty_modem_hup(info, 1); 1030 } 1031 return; 1032 } 1033 /* byte size and parity */ 1034 cval = cflag & (CSIZE | CSTOPB); 1035 cval >>= 4; 1036 if (cflag & PARENB) 1037 cval |= UART_LCR_PARITY; 1038 if (!(cflag & PARODD)) 1039 cval |= UART_LCR_EPAR; 1040 fcr = 0; 1041 1042 /* CTS flow control flag and modem status interrupts */ 1043 if (cflag & CRTSCTS) { 1044 info->flags |= ISDN_ASYNC_CTS_FLOW; 1045 } else 1046 info->flags &= ~ISDN_ASYNC_CTS_FLOW; 1047 if (cflag & CLOCAL) 1048 info->flags &= ~ISDN_ASYNC_CHECK_CD; 1049 else { 1050 info->flags |= ISDN_ASYNC_CHECK_CD; 1051 } 1052} 1053 1054static int 1055isdn_tty_startup(modem_info * info) 1056{ 1057 if (info->flags & ISDN_ASYNC_INITIALIZED) 1058 return 0; 1059 isdn_lock_drivers(); 1060#ifdef ISDN_DEBUG_MODEM_OPEN 1061 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line); 1062#endif 1063 /* 1064 * Now, initialize the UART 1065 */ 1066 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2; 1067 if (info->tty) 1068 clear_bit(TTY_IO_ERROR, &info->tty->flags); 1069 /* 1070 * and set the speed of the serial port 1071 */ 1072 isdn_tty_change_speed(info); 1073 1074 info->flags |= ISDN_ASYNC_INITIALIZED; 1075 info->msr |= (UART_MSR_DSR | UART_MSR_CTS); 1076 info->send_outstanding = 0; 1077 return 0; 1078} 1079 1080/* 1081 * This routine will shutdown a serial port; interrupts are disabled, and 1082 * DTR is dropped if the hangup on close termio flag is on. 1083 */ 1084static void 1085isdn_tty_shutdown(modem_info * info) 1086{ 1087 if (!(info->flags & ISDN_ASYNC_INITIALIZED)) 1088 return; 1089#ifdef ISDN_DEBUG_MODEM_OPEN 1090 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line); 1091#endif 1092 isdn_unlock_drivers(); 1093 info->msr &= ~UART_MSR_RI; 1094 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) { 1095 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS); 1096 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) { 1097 isdn_tty_modem_reset_regs(info, 0); 1098#ifdef ISDN_DEBUG_MODEM_HUP 1099 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n"); 1100#endif 1101 isdn_tty_modem_hup(info, 1); 1102 } 1103 } 1104 if (info->tty) 1105 set_bit(TTY_IO_ERROR, &info->tty->flags); 1106 1107 info->flags &= ~ISDN_ASYNC_INITIALIZED; 1108} 1109 1110/* isdn_tty_write() is the main send-routine. It is called from the upper 1111 * levels within the kernel to perform sending data. Depending on the 1112 * online-flag it either directs output to the at-command-interpreter or 1113 * to the lower level. Additional tasks done here: 1114 * - If online, check for escape-sequence (+++) 1115 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes. 1116 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed. 1117 * - If dialing, abort dial. 1118 */ 1119static int 1120isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count) 1121{ 1122 int c; 1123 int total = 0; 1124 modem_info *info = (modem_info *) tty->driver_data; 1125 atemu *m = &info->emu; 1126 1127 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write")) 1128 return 0; 1129 /* See isdn_tty_senddown() */ 1130 atomic_inc(&info->xmit_lock); 1131 while (1) { 1132 c = count; 1133 if (c > info->xmit_size - info->xmit_count) 1134 c = info->xmit_size - info->xmit_count; 1135 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize) 1136 c = dev->drv[info->isdn_driver]->maxbufsize; 1137 if (c <= 0) 1138 break; 1139 if ((info->online > 1) 1140#ifdef CONFIG_ISDN_AUDIO 1141 || (info->vonline & 3) 1142#endif 1143 ) { 1144#ifdef CONFIG_ISDN_AUDIO 1145 if (!info->vonline) 1146#endif 1147 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c, 1148 &(m->pluscount), 1149 &(m->lastplus)); 1150 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c); 1151#ifdef CONFIG_ISDN_AUDIO 1152 if (info->vonline) { 1153 int cc = isdn_tty_handleDLEdown(info, m, c); 1154 if (info->vonline & 2) { 1155 if (!cc) { 1156 /* If DLE decoding results in zero-transmit, but 1157 * c originally was non-zero, do a wakeup. 1158 */ 1159 tty_wakeup(tty); 1160 info->msr |= UART_MSR_CTS; 1161 info->lsr |= UART_LSR_TEMT; 1162 } 1163 info->xmit_count += cc; 1164 } 1165 if ((info->vonline & 3) == 1) { 1166 /* Do NOT handle Ctrl-Q or Ctrl-S 1167 * when in full-duplex audio mode. 1168 */ 1169 if (isdn_tty_end_vrx(buf, c)) { 1170 info->vonline &= ~1; 1171#ifdef ISDN_DEBUG_MODEM_VOICE 1172 printk(KERN_DEBUG 1173 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n", 1174 info->line); 1175#endif 1176 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info); 1177 } 1178 } 1179 } else 1180 if (TTY_IS_FCLASS1(info)) { 1181 int cc = isdn_tty_handleDLEdown(info, m, c); 1182 1183 if (info->vonline & 4) { /* ETX seen */ 1184 isdn_ctrl c; 1185 1186 c.command = ISDN_CMD_FAXCMD; 1187 c.driver = info->isdn_driver; 1188 c.arg = info->isdn_channel; 1189 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL; 1190 c.parm.aux.subcmd = ETX; 1191 isdn_command(&c); 1192 } 1193 info->vonline = 0; 1194#ifdef ISDN_DEBUG_MODEM_VOICE 1195 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c); 1196#endif 1197 info->xmit_count += cc; 1198 } else 1199#endif 1200 info->xmit_count += c; 1201 } else { 1202 info->msr |= UART_MSR_CTS; 1203 info->lsr |= UART_LSR_TEMT; 1204 if (info->dialing) { 1205 info->dialing = 0; 1206#ifdef ISDN_DEBUG_MODEM_HUP 1207 printk(KERN_DEBUG "Mhup in isdn_tty_write\n"); 1208#endif 1209 isdn_tty_modem_result(RESULT_NO_CARRIER, info); 1210 isdn_tty_modem_hup(info, 1); 1211 } else 1212 c = isdn_tty_edit_at(buf, c, info); 1213 } 1214 buf += c; 1215 count -= c; 1216 total += c; 1217 } 1218 atomic_dec(&info->xmit_lock); 1219 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) { 1220 if (m->mdmreg[REG_DXMT] & BIT_DXMT) { 1221 isdn_tty_senddown(info); 1222 isdn_tty_tint(info); 1223 } 1224 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1); 1225 } 1226 return total; 1227} 1228 1229static int 1230isdn_tty_write_room(struct tty_struct *tty) 1231{ 1232 modem_info *info = (modem_info *) tty->driver_data; 1233 int ret; 1234 1235 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room")) 1236 return 0; 1237 if (!info->online) 1238 return info->xmit_size; 1239 ret = info->xmit_size - info->xmit_count; 1240 return (ret < 0) ? 0 : ret; 1241} 1242 1243static int 1244isdn_tty_chars_in_buffer(struct tty_struct *tty) 1245{ 1246 modem_info *info = (modem_info *) tty->driver_data; 1247 1248 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer")) 1249 return 0; 1250 if (!info->online) 1251 return 0; 1252 return (info->xmit_count); 1253} 1254 1255static void 1256isdn_tty_flush_buffer(struct tty_struct *tty) 1257{ 1258 modem_info *info; 1259 1260 if (!tty) { 1261 return; 1262 } 1263 info = (modem_info *) tty->driver_data; 1264 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) { 1265 return; 1266 } 1267 isdn_tty_cleanup_xmit(info); 1268 info->xmit_count = 0; 1269 tty_wakeup(tty); 1270} 1271 1272static void 1273isdn_tty_flush_chars(struct tty_struct *tty) 1274{ 1275 modem_info *info = (modem_info *) tty->driver_data; 1276 1277 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars")) 1278 return; 1279 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) 1280 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1); 1281} 1282 1283/* 1284 * ------------------------------------------------------------ 1285 * isdn_tty_throttle() 1286 * 1287 * This routine is called by the upper-layer tty layer to signal that 1288 * incoming characters should be throttled. 1289 * ------------------------------------------------------------ 1290 */ 1291static void 1292isdn_tty_throttle(struct tty_struct *tty) 1293{ 1294 modem_info *info = (modem_info *) tty->driver_data; 1295 1296 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle")) 1297 return; 1298 if (I_IXOFF(tty)) 1299 info->x_char = STOP_CHAR(tty); 1300 info->mcr &= ~UART_MCR_RTS; 1301} 1302 1303static void 1304isdn_tty_unthrottle(struct tty_struct *tty) 1305{ 1306 modem_info *info = (modem_info *) tty->driver_data; 1307 1308 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle")) 1309 return; 1310 if (I_IXOFF(tty)) { 1311 if (info->x_char) 1312 info->x_char = 0; 1313 else 1314 info->x_char = START_CHAR(tty); 1315 } 1316 info->mcr |= UART_MCR_RTS; 1317} 1318 1319/* 1320 * ------------------------------------------------------------ 1321 * isdn_tty_ioctl() and friends 1322 * ------------------------------------------------------------ 1323 */ 1324 1325/* 1326 * isdn_tty_get_lsr_info - get line status register info 1327 * 1328 * Purpose: Let user call ioctl() to get info when the UART physically 1329 * is emptied. On bus types like RS485, the transmitter must 1330 * release the bus after transmitting. This must be done when 1331 * the transmit shift register is empty, not be done when the 1332 * transmit holding register is empty. This functionality 1333 * allows RS485 driver to be written in user space. 1334 */ 1335static int 1336isdn_tty_get_lsr_info(modem_info * info, uint __user * value) 1337{ 1338 u_char status; 1339 uint result; 1340 1341 status = info->lsr; 1342 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); 1343 return put_user(result, value); 1344} 1345 1346 1347static int 1348isdn_tty_tiocmget(struct tty_struct *tty) 1349{ 1350 modem_info *info = (modem_info *) tty->driver_data; 1351 u_char control, status; 1352 1353 if (isdn_tty_paranoia_check(info, tty->name, __func__)) 1354 return -ENODEV; 1355 if (tty->flags & (1 << TTY_IO_ERROR)) 1356 return -EIO; 1357 1358 mutex_lock(&modem_info_mutex); 1359#ifdef ISDN_DEBUG_MODEM_IOCTL 1360 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line); 1361#endif 1362 1363 control = info->mcr; 1364 status = info->msr; 1365 mutex_unlock(&modem_info_mutex); 1366 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) 1367 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) 1368 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) 1369 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) 1370 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) 1371 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); 1372} 1373 1374static int 1375isdn_tty_tiocmset(struct tty_struct *tty, 1376 unsigned int set, unsigned int clear) 1377{ 1378 modem_info *info = (modem_info *) tty->driver_data; 1379 1380 if (isdn_tty_paranoia_check(info, tty->name, __func__)) 1381 return -ENODEV; 1382 if (tty->flags & (1 << TTY_IO_ERROR)) 1383 return -EIO; 1384 1385#ifdef ISDN_DEBUG_MODEM_IOCTL 1386 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear); 1387#endif 1388 1389 mutex_lock(&modem_info_mutex); 1390 if (set & TIOCM_RTS) 1391 info->mcr |= UART_MCR_RTS; 1392 if (set & TIOCM_DTR) { 1393 info->mcr |= UART_MCR_DTR; 1394 isdn_tty_modem_ncarrier(info); 1395 } 1396 1397 if (clear & TIOCM_RTS) 1398 info->mcr &= ~UART_MCR_RTS; 1399 if (clear & TIOCM_DTR) { 1400 info->mcr &= ~UART_MCR_DTR; 1401 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) { 1402 isdn_tty_modem_reset_regs(info, 0); 1403#ifdef ISDN_DEBUG_MODEM_HUP 1404 printk(KERN_DEBUG "Mhup in TIOCMSET\n"); 1405#endif 1406 if (info->online) 1407 info->ncarrier = 1; 1408 isdn_tty_modem_hup(info, 1); 1409 } 1410 } 1411 mutex_unlock(&modem_info_mutex); 1412 return 0; 1413} 1414 1415static int 1416isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg) 1417{ 1418 modem_info *info = (modem_info *) tty->driver_data; 1419 int retval; 1420 1421 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl")) 1422 return -ENODEV; 1423 if (tty->flags & (1 << TTY_IO_ERROR)) 1424 return -EIO; 1425 switch (cmd) { 1426 case TCSBRK: /* SVID version: non-zero arg --> no break */ 1427#ifdef ISDN_DEBUG_MODEM_IOCTL 1428 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line); 1429#endif 1430 retval = tty_check_change(tty); 1431 if (retval) 1432 return retval; 1433 tty_wait_until_sent(tty, 0); 1434 return 0; 1435 case TCSBRKP: /* support for POSIX tcsendbreak() */ 1436#ifdef ISDN_DEBUG_MODEM_IOCTL 1437 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line); 1438#endif 1439 retval = tty_check_change(tty); 1440 if (retval) 1441 return retval; 1442 tty_wait_until_sent(tty, 0); 1443 return 0; 1444 case TIOCSERGETLSR: /* Get line status register */ 1445#ifdef ISDN_DEBUG_MODEM_IOCTL 1446 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line); 1447#endif 1448 return isdn_tty_get_lsr_info(info, (uint __user *) arg); 1449 default: 1450#ifdef ISDN_DEBUG_MODEM_IOCTL 1451 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line); 1452#endif 1453 return -ENOIOCTLCMD; 1454 } 1455 return 0; 1456} 1457 1458static void 1459isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios) 1460{ 1461 modem_info *info = (modem_info *) tty->driver_data; 1462 1463 if (!old_termios) 1464 isdn_tty_change_speed(info); 1465 else { 1466 if (tty->termios->c_cflag == old_termios->c_cflag && 1467 tty->termios->c_ispeed == old_termios->c_ispeed && 1468 tty->termios->c_ospeed == old_termios->c_ospeed) 1469 return; 1470 isdn_tty_change_speed(info); 1471 if ((old_termios->c_cflag & CRTSCTS) && 1472 !(tty->termios->c_cflag & CRTSCTS)) 1473 tty->hw_stopped = 0; 1474 } 1475} 1476 1477/* 1478 * ------------------------------------------------------------ 1479 * isdn_tty_open() and friends 1480 * ------------------------------------------------------------ 1481 */ 1482static int 1483isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info) 1484{ 1485 DECLARE_WAITQUEUE(wait, NULL); 1486 int do_clocal = 0; 1487 int retval; 1488 1489 /* 1490 * If the device is in the middle of being closed, then block 1491 * until it's done, and then try again. 1492 */ 1493 if (tty_hung_up_p(filp) || 1494 (info->flags & ISDN_ASYNC_CLOSING)) { 1495 if (info->flags & ISDN_ASYNC_CLOSING) 1496 interruptible_sleep_on(&info->close_wait); 1497#ifdef MODEM_DO_RESTART 1498 if (info->flags & ISDN_ASYNC_HUP_NOTIFY) 1499 return -EAGAIN; 1500 else 1501 return -ERESTARTSYS; 1502#else 1503 return -EAGAIN; 1504#endif 1505 } 1506 /* 1507 * If non-blocking mode is set, then make the check up front 1508 * and then exit. 1509 */ 1510 if ((filp->f_flags & O_NONBLOCK) || 1511 (tty->flags & (1 << TTY_IO_ERROR))) { 1512 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) 1513 return -EBUSY; 1514 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE; 1515 return 0; 1516 } 1517 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) { 1518 if (info->normal_termios.c_cflag & CLOCAL) 1519 do_clocal = 1; 1520 } else { 1521 if (tty->termios->c_cflag & CLOCAL) 1522 do_clocal = 1; 1523 } 1524 /* 1525 * Block waiting for the carrier detect and the line to become 1526 * free (i.e., not in use by the callout). While we are in 1527 * this loop, info->count is dropped by one, so that 1528 * isdn_tty_close() knows when to free things. We restore it upon 1529 * exit, either normal or abnormal. 1530 */ 1531 retval = 0; 1532 add_wait_queue(&info->open_wait, &wait); 1533#ifdef ISDN_DEBUG_MODEM_OPEN 1534 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n", 1535 info->line, info->count); 1536#endif 1537 if (!(tty_hung_up_p(filp))) 1538 info->count--; 1539 info->blocked_open++; 1540 while (1) { 1541 set_current_state(TASK_INTERRUPTIBLE); 1542 if (tty_hung_up_p(filp) || 1543 !(info->flags & ISDN_ASYNC_INITIALIZED)) { 1544#ifdef MODEM_DO_RESTART 1545 if (info->flags & ISDN_ASYNC_HUP_NOTIFY) 1546 retval = -EAGAIN; 1547 else 1548 retval = -ERESTARTSYS; 1549#else 1550 retval = -EAGAIN; 1551#endif 1552 break; 1553 } 1554 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) && 1555 !(info->flags & ISDN_ASYNC_CLOSING) && 1556 (do_clocal || (info->msr & UART_MSR_DCD))) { 1557 break; 1558 } 1559 if (signal_pending(current)) { 1560 retval = -ERESTARTSYS; 1561 break; 1562 } 1563#ifdef ISDN_DEBUG_MODEM_OPEN 1564 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n", 1565 info->line, info->count); 1566#endif 1567 schedule(); 1568 } 1569 current->state = TASK_RUNNING; 1570 remove_wait_queue(&info->open_wait, &wait); 1571 if (!tty_hung_up_p(filp)) 1572 info->count++; 1573 info->blocked_open--; 1574#ifdef ISDN_DEBUG_MODEM_OPEN 1575 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n", 1576 info->line, info->count); 1577#endif 1578 if (retval) 1579 return retval; 1580 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE; 1581 return 0; 1582} 1583 1584/* 1585 * This routine is called whenever a serial port is opened. It 1586 * enables interrupts for a serial port, linking in its async structure into 1587 * the IRQ chain. It also performs the serial-specific 1588 * initialization for the tty structure. 1589 */ 1590static int 1591isdn_tty_open(struct tty_struct *tty, struct file *filp) 1592{ 1593 modem_info *info; 1594 int retval, line; 1595 1596 line = tty->index; 1597 if (line < 0 || line >= ISDN_MAX_CHANNELS) 1598 return -ENODEV; 1599 info = &dev->mdm.info[line]; 1600 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open")) 1601 return -ENODEV; 1602 if (!try_module_get(info->owner)) { 1603 printk(KERN_WARNING "%s: cannot reserve module\n", __func__); 1604 return -ENODEV; 1605 } 1606#ifdef ISDN_DEBUG_MODEM_OPEN 1607 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name, 1608 info->count); 1609#endif 1610 info->count++; 1611 tty->driver_data = info; 1612 info->tty = tty; 1613 /* 1614 * Start up serial port 1615 */ 1616 retval = isdn_tty_startup(info); 1617 if (retval) { 1618#ifdef ISDN_DEBUG_MODEM_OPEN 1619 printk(KERN_DEBUG "isdn_tty_open return after startup\n"); 1620#endif 1621 module_put(info->owner); 1622 return retval; 1623 } 1624 retval = isdn_tty_block_til_ready(tty, filp, info); 1625 if (retval) { 1626#ifdef ISDN_DEBUG_MODEM_OPEN 1627 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n"); 1628#endif 1629 module_put(info->owner); 1630 return retval; 1631 } 1632#ifdef ISDN_DEBUG_MODEM_OPEN 1633 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line); 1634#endif 1635 dev->modempoll++; 1636#ifdef ISDN_DEBUG_MODEM_OPEN 1637 printk(KERN_DEBUG "isdn_tty_open normal exit\n"); 1638#endif 1639 return 0; 1640} 1641 1642static void 1643isdn_tty_close(struct tty_struct *tty, struct file *filp) 1644{ 1645 modem_info *info = (modem_info *) tty->driver_data; 1646 ulong timeout; 1647 1648 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close")) 1649 return; 1650 if (tty_hung_up_p(filp)) { 1651#ifdef ISDN_DEBUG_MODEM_OPEN 1652 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n"); 1653#endif 1654 return; 1655 } 1656 if ((tty->count == 1) && (info->count != 1)) { 1657 /* 1658 * Uh, oh. tty->count is 1, which means that the tty 1659 * structure will be freed. Info->count should always 1660 * be one in these conditions. If it's greater than 1661 * one, we've got real problems, since it means the 1662 * serial port won't be shutdown. 1663 */ 1664 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, " 1665 "info->count is %d\n", info->count); 1666 info->count = 1; 1667 } 1668 if (--info->count < 0) { 1669 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n", 1670 info->line, info->count); 1671 info->count = 0; 1672 } 1673 if (info->count) { 1674#ifdef ISDN_DEBUG_MODEM_OPEN 1675 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n"); 1676#endif 1677 module_put(info->owner); 1678 return; 1679 } 1680 info->flags |= ISDN_ASYNC_CLOSING; 1681 /* 1682 * Save the termios structure, since this port may have 1683 * separate termios for callout and dialin. 1684 */ 1685 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) 1686 info->normal_termios = *tty->termios; 1687 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) 1688 info->callout_termios = *tty->termios; 1689 1690 tty->closing = 1; 1691 /* 1692 * At this point we stop accepting input. To do this, we 1693 * disable the receive line status interrupts, and tell the 1694 * interrupt driver to stop checking the data ready bit in the 1695 * line status register. 1696 */ 1697 if (info->flags & ISDN_ASYNC_INITIALIZED) { 1698 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ 1699 /* 1700 * Before we drop DTR, make sure the UART transmitter 1701 * has completely drained; this is especially 1702 * important if there is a transmit FIFO! 1703 */ 1704 timeout = jiffies + HZ; 1705 while (!(info->lsr & UART_LSR_TEMT)) { 1706 schedule_timeout_interruptible(20); 1707 if (time_after(jiffies,timeout)) 1708 break; 1709 } 1710 } 1711 dev->modempoll--; 1712 isdn_tty_shutdown(info); 1713 isdn_tty_flush_buffer(tty); 1714 tty_ldisc_flush(tty); 1715 info->tty = NULL; 1716 info->ncarrier = 0; 1717 tty->closing = 0; 1718 module_put(info->owner); 1719 if (info->blocked_open) { 1720 msleep_interruptible(500); 1721 wake_up_interruptible(&info->open_wait); 1722 } 1723 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING); 1724 wake_up_interruptible(&info->close_wait); 1725#ifdef ISDN_DEBUG_MODEM_OPEN 1726 printk(KERN_DEBUG "isdn_tty_close normal exit\n"); 1727#endif 1728} 1729 1730/* 1731 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled. 1732 */ 1733static void 1734isdn_tty_hangup(struct tty_struct *tty) 1735{ 1736 modem_info *info = (modem_info *) tty->driver_data; 1737 1738 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup")) 1739 return; 1740 isdn_tty_shutdown(info); 1741 info->count = 0; 1742 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE); 1743 info->tty = NULL; 1744 wake_up_interruptible(&info->open_wait); 1745} 1746 1747/* This routine initializes all emulator-data. 1748 */ 1749static void 1750isdn_tty_reset_profile(atemu * m) 1751{ 1752 m->profile[0] = 0; 1753 m->profile[1] = 0; 1754 m->profile[2] = 43; 1755 m->profile[3] = 13; 1756 m->profile[4] = 10; 1757 m->profile[5] = 8; 1758 m->profile[6] = 3; 1759 m->profile[7] = 60; 1760 m->profile[8] = 2; 1761 m->profile[9] = 6; 1762 m->profile[10] = 7; 1763 m->profile[11] = 70; 1764 m->profile[12] = 0x45; 1765 m->profile[13] = 4; 1766 m->profile[14] = ISDN_PROTO_L2_X75I; 1767 m->profile[15] = ISDN_PROTO_L3_TRANS; 1768 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16; 1769 m->profile[17] = ISDN_MODEM_WINSIZE; 1770 m->profile[18] = 4; 1771 m->profile[19] = 0; 1772 m->profile[20] = 0; 1773 m->profile[23] = 0; 1774 m->pmsn[0] = '\0'; 1775 m->plmsn[0] = '\0'; 1776} 1777 1778#ifdef CONFIG_ISDN_AUDIO 1779static void 1780isdn_tty_modem_reset_vpar(atemu * m) 1781{ 1782 m->vpar[0] = 2; /* Voice-device (2 = phone line) */ 1783 m->vpar[1] = 0; /* Silence detection level (0 = none ) */ 1784 m->vpar[2] = 70; /* Silence interval (7 sec. ) */ 1785 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */ 1786 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */ 1787 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */ 1788} 1789#endif 1790 1791#ifdef CONFIG_ISDN_TTY_FAX 1792static void 1793isdn_tty_modem_reset_faxpar(modem_info * info) 1794{ 1795 T30_s *f = info->fax; 1796 1797 f->code = 0; 1798 f->phase = ISDN_FAX_PHASE_IDLE; 1799 f->direction = 0; 1800 f->resolution = 1; /* fine */ 1801 f->rate = 5; /* 14400 bit/s */ 1802 f->width = 0; 1803 f->length = 0; 1804 f->compression = 0; 1805 f->ecm = 0; 1806 f->binary = 0; 1807 f->scantime = 0; 1808 memset(&f->id[0], 32, FAXIDLEN - 1); 1809 f->id[FAXIDLEN - 1] = 0; 1810 f->badlin = 0; 1811 f->badmul = 0; 1812 f->bor = 0; 1813 f->nbc = 0; 1814 f->cq = 0; 1815 f->cr = 0; 1816 f->ctcrty = 0; 1817 f->minsp = 0; 1818 f->phcto = 30; 1819 f->rel = 0; 1820 memset(&f->pollid[0], 32, FAXIDLEN - 1); 1821 f->pollid[FAXIDLEN - 1] = 0; 1822} 1823#endif 1824 1825static void 1826isdn_tty_modem_reset_regs(modem_info * info, int force) 1827{ 1828 atemu *m = &info->emu; 1829 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) { 1830 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG); 1831 memcpy(m->msn, m->pmsn, ISDN_MSNLEN); 1832 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN); 1833 info->xmit_size = m->mdmreg[REG_PSIZE] * 16; 1834 } 1835#ifdef CONFIG_ISDN_AUDIO 1836 isdn_tty_modem_reset_vpar(m); 1837#endif 1838#ifdef CONFIG_ISDN_TTY_FAX 1839 isdn_tty_modem_reset_faxpar(info); 1840#endif 1841 m->mdmcmdl = 0; 1842} 1843 1844static void 1845modem_write_profile(atemu * m) 1846{ 1847 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG); 1848 memcpy(m->pmsn, m->msn, ISDN_MSNLEN); 1849 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN); 1850 if (dev->profd) 1851 send_sig(SIGIO, dev->profd, 1); 1852} 1853 1854static const struct tty_operations modem_ops = { 1855 .open = isdn_tty_open, 1856 .close = isdn_tty_close, 1857 .write = isdn_tty_write, 1858 .flush_chars = isdn_tty_flush_chars, 1859 .write_room = isdn_tty_write_room, 1860 .chars_in_buffer = isdn_tty_chars_in_buffer, 1861 .flush_buffer = isdn_tty_flush_buffer, 1862 .ioctl = isdn_tty_ioctl, 1863 .throttle = isdn_tty_throttle, 1864 .unthrottle = isdn_tty_unthrottle, 1865 .set_termios = isdn_tty_set_termios, 1866 .hangup = isdn_tty_hangup, 1867 .tiocmget = isdn_tty_tiocmget, 1868 .tiocmset = isdn_tty_tiocmset, 1869}; 1870 1871int 1872isdn_tty_modem_init(void) 1873{ 1874 isdn_modem_t *m; 1875 int i, retval; 1876 modem_info *info; 1877 1878 m = &dev->mdm; 1879 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS); 1880 if (!m->tty_modem) 1881 return -ENOMEM; 1882 m->tty_modem->name = "ttyI"; 1883 m->tty_modem->major = ISDN_TTY_MAJOR; 1884 m->tty_modem->minor_start = 0; 1885 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL; 1886 m->tty_modem->subtype = SERIAL_TYPE_NORMAL; 1887 m->tty_modem->init_termios = tty_std_termios; 1888 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; 1889 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 1890 m->tty_modem->driver_name = "isdn_tty"; 1891 tty_set_operations(m->tty_modem, &modem_ops); 1892 retval = tty_register_driver(m->tty_modem); 1893 if (retval) { 1894 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n"); 1895 goto err; 1896 } 1897 for (i = 0; i < ISDN_MAX_CHANNELS; i++) { 1898 info = &m->info[i]; 1899#ifdef CONFIG_ISDN_TTY_FAX 1900 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) { 1901 printk(KERN_ERR "Could not allocate fax t30-buffer\n"); 1902 retval = -ENOMEM; 1903 goto err_unregister; 1904 } 1905#endif 1906#ifdef MODULE 1907 info->owner = THIS_MODULE; 1908#endif 1909 spin_lock_init(&info->readlock); 1910 sprintf(info->last_cause, "0000"); 1911 sprintf(info->last_num, "none"); 1912 info->last_dir = 0; 1913 info->last_lhup = 1; 1914 info->last_l2 = -1; 1915 info->last_si = 0; 1916 isdn_tty_reset_profile(&info->emu); 1917 isdn_tty_modem_reset_regs(info, 1); 1918 info->magic = ISDN_ASYNC_MAGIC; 1919 info->line = i; 1920 info->tty = NULL; 1921 info->x_char = 0; 1922 info->count = 0; 1923 info->blocked_open = 0; 1924 init_waitqueue_head(&info->open_wait); 1925 init_waitqueue_head(&info->close_wait); 1926 info->isdn_driver = -1; 1927 info->isdn_channel = -1; 1928 info->drv_index = -1; 1929 info->xmit_size = ISDN_SERIAL_XMIT_SIZE; 1930 init_timer(&info->nc_timer); 1931 info->nc_timer.function = isdn_tty_modem_do_ncarrier; 1932 info->nc_timer.data = (unsigned long) info; 1933 skb_queue_head_init(&info->xmit_queue); 1934#ifdef CONFIG_ISDN_AUDIO 1935 skb_queue_head_init(&info->dtmf_queue); 1936#endif 1937 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) { 1938 printk(KERN_ERR "Could not allocate modem xmit-buffer\n"); 1939 retval = -ENOMEM; 1940 goto err_unregister; 1941 } 1942 /* Make room for T.70 header */ 1943 info->xmit_buf += 4; 1944 } 1945 return 0; 1946err_unregister: 1947 for (i--; i >= 0; i--) { 1948 info = &m->info[i]; 1949#ifdef CONFIG_ISDN_TTY_FAX 1950 kfree(info->fax); 1951#endif 1952 kfree(info->xmit_buf - 4); 1953 } 1954 tty_unregister_driver(m->tty_modem); 1955 err: 1956 put_tty_driver(m->tty_modem); 1957 m->tty_modem = NULL; 1958 return retval; 1959} 1960 1961void 1962isdn_tty_exit(void) 1963{ 1964 modem_info *info; 1965 int i; 1966 1967 for (i = 0; i < ISDN_MAX_CHANNELS; i++) { 1968 info = &dev->mdm.info[i]; 1969 isdn_tty_cleanup_xmit(info); 1970#ifdef CONFIG_ISDN_TTY_FAX 1971 kfree(info->fax); 1972#endif 1973 kfree(info->xmit_buf - 4); 1974 } 1975 tty_unregister_driver(dev->mdm.tty_modem); 1976 put_tty_driver(dev->mdm.tty_modem); 1977 dev->mdm.tty_modem = NULL; 1978} 1979 1980 1981/* 1982 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx) 1983 * match the MSN against the MSNs (glob patterns) defined for tty_emulator, 1984 * and return 0 for match, 1 for no match, 2 if MSN could match if longer. 1985 */ 1986 1987static int 1988isdn_tty_match_icall(char *cid, atemu *emu, int di) 1989{ 1990#ifdef ISDN_DEBUG_MODEM_ICALL 1991 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n", 1992 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di), 1993 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]); 1994#endif 1995 if (strlen(emu->lmsn)) { 1996 char *p = emu->lmsn; 1997 char *q; 1998 int tmp; 1999 int ret = 0; 2000 2001 while (1) { 2002 if ((q = strchr(p, ';'))) 2003 *q = '\0'; 2004 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret) 2005 ret = tmp; 2006#ifdef ISDN_DEBUG_MODEM_ICALL 2007 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n", 2008 p, isdn_map_eaz2msn(emu->msn, di), tmp); 2009#endif 2010 if (q) { 2011 *q = ';'; 2012 p = q; 2013 p++; 2014 } 2015 if (!tmp) 2016 return 0; 2017 if (!q) 2018 break; 2019 } 2020 return ret; 2021 } else { 2022 int tmp; 2023 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di)); 2024#ifdef ISDN_DEBUG_MODEM_ICALL 2025 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n", 2026 isdn_map_eaz2msn(emu->msn, di), tmp); 2027#endif 2028 return tmp; 2029 } 2030} 2031 2032/* 2033 * An incoming call-request has arrived. 2034 * Search the tty-devices for an appropriate device and bind 2035 * it to the ISDN-Channel. 2036 * Return: 2037 * 2038 * 0 = No matching device found. 2039 * 1 = A matching device found. 2040 * 3 = No match found, but eventually would match, if 2041 * CID is longer. 2042 */ 2043int 2044isdn_tty_find_icall(int di, int ch, setup_parm *setup) 2045{ 2046 char *eaz; 2047 int i; 2048 int wret; 2049 int idx; 2050 int si1; 2051 int si2; 2052 char *nr; 2053 ulong flags; 2054 2055 if (!setup->phone[0]) { 2056 nr = "0"; 2057 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n"); 2058 } else 2059 nr = setup->phone; 2060 si1 = (int) setup->si1; 2061 si2 = (int) setup->si2; 2062 if (!setup->eazmsn[0]) { 2063 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n"); 2064 eaz = "0"; 2065 } else 2066 eaz = setup->eazmsn; 2067#ifdef ISDN_DEBUG_MODEM_ICALL 2068 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2); 2069#endif 2070 wret = 0; 2071 spin_lock_irqsave(&dev->lock, flags); 2072 for (i = 0; i < ISDN_MAX_CHANNELS; i++) { 2073 modem_info *info = &dev->mdm.info[i]; 2074 2075 if (info->count == 0) 2076 continue; 2077 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */ 2078 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */ 2079 idx = isdn_dc2minor(di, ch); 2080#ifdef ISDN_DEBUG_MODEM_ICALL 2081 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret); 2082 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx, 2083 info->flags, info->isdn_driver, info->isdn_channel, 2084 dev->usage[idx]); 2085#endif 2086 if ( 2087#ifndef FIX_FILE_TRANSFER 2088 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) && 2089#endif 2090 (info->isdn_driver == -1) && 2091 (info->isdn_channel == -1) && 2092 (USG_NONE(dev->usage[idx]))) { 2093 int matchret; 2094 2095 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret) 2096 wret = matchret; 2097 if (!matchret) { /* EAZ is matching */ 2098 info->isdn_driver = di; 2099 info->isdn_channel = ch; 2100 info->drv_index = idx; 2101 dev->m_idx[idx] = info->line; 2102 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE; 2103 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]); 2104 strcpy(dev->num[idx], nr); 2105 strcpy(info->emu.cpn, eaz); 2106 info->emu.mdmreg[REG_SI1I] = si2bit[si1]; 2107 info->emu.mdmreg[REG_PLAN] = setup->plan; 2108 info->emu.mdmreg[REG_SCREEN] = setup->screen; 2109 isdn_info_update(); 2110 spin_unlock_irqrestore(&dev->lock, flags); 2111 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr, 2112 info->line); 2113 info->msr |= UART_MSR_RI; 2114 isdn_tty_modem_result(RESULT_RING, info); 2115 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1); 2116 return 1; 2117 } 2118 } 2119 } 2120 } 2121 spin_unlock_irqrestore(&dev->lock, flags); 2122 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz, 2123 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored"); 2124 return (wret == 2)?3:0; 2125} 2126 2127#define TTY_IS_ACTIVE(info) \ 2128 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE)) 2129 2130int 2131isdn_tty_stat_callback(int i, isdn_ctrl *c) 2132{ 2133 int mi; 2134 modem_info *info; 2135 char *e; 2136 2137 if (i < 0) 2138 return 0; 2139 if ((mi = dev->m_idx[i]) >= 0) { 2140 info = &dev->mdm.info[mi]; 2141 switch (c->command) { 2142 case ISDN_STAT_CINF: 2143 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num); 2144 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10); 2145 if (e == (char *)c->parm.num) 2146 info->emu.charge = 0; 2147 2148 break; 2149 case ISDN_STAT_BSENT: 2150#ifdef ISDN_TTY_STAT_DEBUG 2151 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line); 2152#endif 2153 if ((info->isdn_driver == c->driver) && 2154 (info->isdn_channel == c->arg)) { 2155 info->msr |= UART_MSR_CTS; 2156 if (info->send_outstanding) 2157 if (!(--info->send_outstanding)) 2158 info->lsr |= UART_LSR_TEMT; 2159 isdn_tty_tint(info); 2160 return 1; 2161 } 2162 break; 2163 case ISDN_STAT_CAUSE: 2164#ifdef ISDN_TTY_STAT_DEBUG 2165 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line); 2166#endif 2167 /* Signal cause to tty-device */ 2168 strncpy(info->last_cause, c->parm.num, 5); 2169 return 1; 2170 case ISDN_STAT_DISPLAY: 2171#ifdef ISDN_TTY_STAT_DEBUG 2172 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line); 2173#endif 2174 /* Signal display to tty-device */ 2175 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) && 2176 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) { 2177 isdn_tty_at_cout("\r\n", info); 2178 isdn_tty_at_cout("DISPLAY: ", info); 2179 isdn_tty_at_cout(c->parm.display, info); 2180 isdn_tty_at_cout("\r\n", info); 2181 } 2182 return 1; 2183 case ISDN_STAT_DCONN: 2184#ifdef ISDN_TTY_STAT_DEBUG 2185 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line); 2186#endif 2187 if (TTY_IS_ACTIVE(info)) { 2188 if (info->dialing == 1) { 2189 info->dialing = 2; 2190 return 1; 2191 } 2192 } 2193 break; 2194 case ISDN_STAT_DHUP: 2195#ifdef ISDN_TTY_STAT_DEBUG 2196 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line); 2197#endif 2198 if (TTY_IS_ACTIVE(info)) { 2199 if (info->dialing == 1) 2200 isdn_tty_modem_result(RESULT_BUSY, info); 2201 if (info->dialing > 1) 2202 isdn_tty_modem_result(RESULT_NO_CARRIER, info); 2203 info->dialing = 0; 2204#ifdef ISDN_DEBUG_MODEM_HUP 2205 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n"); 2206#endif 2207 isdn_tty_modem_hup(info, 0); 2208 return 1; 2209 } 2210 break; 2211 case ISDN_STAT_BCONN: 2212#ifdef ISDN_TTY_STAT_DEBUG 2213 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line); 2214#endif 2215 /* Wake up any processes waiting 2216 * for incoming call of this device when 2217 * DCD follow the state of incoming carrier 2218 */ 2219 if (info->blocked_open && 2220 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) { 2221 wake_up_interruptible(&info->open_wait); 2222 } 2223 2224 /* Schedule CONNECT-Message to any tty 2225 * waiting for it and 2226 * set DCD-bit of its modem-status. 2227 */ 2228 if (TTY_IS_ACTIVE(info) || 2229 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) { 2230 info->msr |= UART_MSR_DCD; 2231 info->emu.charge = 0; 2232 if (info->dialing & 0xf) 2233 info->last_dir = 1; 2234 else 2235 info->last_dir = 0; 2236 info->dialing = 0; 2237 info->rcvsched = 1; 2238 if (USG_MODEM(dev->usage[i])) { 2239 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) { 2240 strcpy(info->emu.connmsg, c->parm.num); 2241 isdn_tty_modem_result(RESULT_CONNECT, info); 2242 } else 2243 isdn_tty_modem_result(RESULT_CONNECT64000, info); 2244 } 2245 if (USG_VOICE(dev->usage[i])) 2246 isdn_tty_modem_result(RESULT_VCON, info); 2247 return 1; 2248 } 2249 break; 2250 case ISDN_STAT_BHUP: 2251#ifdef ISDN_TTY_STAT_DEBUG 2252 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line); 2253#endif 2254 if (TTY_IS_ACTIVE(info)) { 2255#ifdef ISDN_DEBUG_MODEM_HUP 2256 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n"); 2257#endif 2258 isdn_tty_modem_hup(info, 0); 2259 return 1; 2260 } 2261 break; 2262 case ISDN_STAT_NODCH: 2263#ifdef ISDN_TTY_STAT_DEBUG 2264 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line); 2265#endif 2266 if (TTY_IS_ACTIVE(info)) { 2267 if (info->dialing) { 2268 info->dialing = 0; 2269 info->last_l2 = -1; 2270 info->last_si = 0; 2271 sprintf(info->last_cause, "0000"); 2272 isdn_tty_modem_result(RESULT_NO_DIALTONE, info); 2273 } 2274 isdn_tty_modem_hup(info, 0); 2275 return 1; 2276 } 2277 break; 2278 case ISDN_STAT_UNLOAD: 2279#ifdef ISDN_TTY_STAT_DEBUG 2280 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line); 2281#endif 2282 for (i = 0; i < ISDN_MAX_CHANNELS; i++) { 2283 info = &dev->mdm.info[i]; 2284 if (info->isdn_driver == c->driver) { 2285 if (info->online) 2286 isdn_tty_modem_hup(info, 1); 2287 } 2288 } 2289 return 1; 2290#ifdef CONFIG_ISDN_TTY_FAX 2291 case ISDN_STAT_FAXIND: 2292 if (TTY_IS_ACTIVE(info)) { 2293 isdn_tty_fax_command(info, c); 2294 } 2295 break; 2296#endif 2297#ifdef CONFIG_ISDN_AUDIO 2298 case ISDN_STAT_AUDIO: 2299 if (TTY_IS_ACTIVE(info)) { 2300 switch(c->parm.num[0]) { 2301 case ISDN_AUDIO_DTMF: 2302 if (info->vonline) { 2303 isdn_audio_put_dle_code(info, 2304 c->parm.num[1]); 2305 } 2306 break; 2307 } 2308 } 2309 break; 2310#endif 2311 } 2312 } 2313 return 0; 2314} 2315 2316/********************************************************************* 2317 Modem-Emulator-Routines 2318 *********************************************************************/ 2319 2320#define cmdchar(c) ((c>=' ')&&(c<=0x7f)) 2321 2322/* 2323 * Put a message from the AT-emulator into receive-buffer of tty, 2324 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5. 2325 */ 2326void 2327isdn_tty_at_cout(char *msg, modem_info * info) 2328{ 2329 struct tty_struct *tty; 2330 atemu *m = &info->emu; 2331 char *p; 2332 char c; 2333 u_long flags; 2334 struct sk_buff *skb = NULL; 2335 char *sp = NULL; 2336 int l; 2337 2338 if (!msg) { 2339 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n"); 2340 return; 2341 } 2342 2343 l = strlen(msg); 2344 2345 spin_lock_irqsave(&info->readlock, flags); 2346 tty = info->tty; 2347 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) { 2348 spin_unlock_irqrestore(&info->readlock, flags); 2349 return; 2350 } 2351 2352 /* use queue instead of direct, if online and */ 2353 /* data is in queue or buffer is full */ 2354 if (info->online && ((tty_buffer_request_room(tty, l) < l) || 2355 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) { 2356 skb = alloc_skb(l, GFP_ATOMIC); 2357 if (!skb) { 2358 spin_unlock_irqrestore(&info->readlock, flags); 2359 return; 2360 } 2361 sp = skb_put(skb, l); 2362#ifdef CONFIG_ISDN_AUDIO 2363 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0; 2364 ISDN_AUDIO_SKB_LOCK(skb) = 0; 2365#endif 2366 } 2367 2368 for (p = msg; *p; p++) { 2369 switch (*p) { 2370 case '\r': 2371 c = m->mdmreg[REG_CR]; 2372 break; 2373 case '\n': 2374 c = m->mdmreg[REG_LF]; 2375 break; 2376 case '\b': 2377 c = m->mdmreg[REG_BS]; 2378 break; 2379 default: 2380 c = *p; 2381 } 2382 if (skb) { 2383 *sp++ = c; 2384 } else { 2385 if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0) 2386 break; 2387 } 2388 } 2389 if (skb) { 2390 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb); 2391 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len; 2392 spin_unlock_irqrestore(&info->readlock, flags); 2393 /* Schedule dequeuing */ 2394 if (dev->modempoll && info->rcvsched) 2395 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1); 2396 2397 } else { 2398 spin_unlock_irqrestore(&info->readlock, flags); 2399 tty_flip_buffer_push(tty); 2400 } 2401} 2402 2403/* 2404 * Perform ATH Hangup 2405 */ 2406static void 2407isdn_tty_on_hook(modem_info * info) 2408{ 2409 if (info->isdn_channel >= 0) { 2410#ifdef ISDN_DEBUG_MODEM_HUP 2411 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n"); 2412#endif 2413 isdn_tty_modem_hup(info, 1); 2414 } 2415} 2416 2417static void 2418isdn_tty_off_hook(void) 2419{ 2420 printk(KERN_DEBUG "isdn_tty_off_hook\n"); 2421} 2422 2423#define PLUSWAIT1 (HZ/2) /* 0.5 sec. */ 2424#define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */ 2425 2426/* 2427 * Check Buffer for Modem-escape-sequence, activate timer-callback to 2428 * isdn_tty_modem_escape() if sequence found. 2429 * 2430 * Parameters: 2431 * p pointer to databuffer 2432 * plus escape-character 2433 * count length of buffer 2434 * pluscount count of valid escape-characters so far 2435 * lastplus timestamp of last character 2436 */ 2437static void 2438isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount, 2439 u_long *lastplus) 2440{ 2441 if (plus > 127) 2442 return; 2443 if (count > 3) { 2444 p += count - 3; 2445 count = 3; 2446 *pluscount = 0; 2447 } 2448 while (count > 0) { 2449 if (*(p++) == plus) { 2450 if ((*pluscount)++) { 2451 /* Time since last '+' > 0.5 sec. ? */ 2452 if (time_after(jiffies, *lastplus + PLUSWAIT1)) 2453 *pluscount = 1; 2454 } else { 2455 /* Time since last non-'+' < 1.5 sec. ? */ 2456 if (time_before(jiffies, *lastplus + PLUSWAIT2)) 2457 *pluscount = 0; 2458 } 2459 if ((*pluscount == 3) && (count == 1)) 2460 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1); 2461 if (*pluscount > 3) 2462 *pluscount = 1; 2463 } else 2464 *pluscount = 0; 2465 *lastplus = jiffies; 2466 count--; 2467 } 2468} 2469 2470/* 2471 * Return result of AT-emulator to tty-receive-buffer, depending on 2472 * modem-register 12, bit 0 and 1. 2473 * For CONNECT-messages also switch to online-mode. 2474 * For RING-message handle auto-ATA if register 0 != 0 2475 */ 2476 2477static void 2478isdn_tty_modem_result(int code, modem_info * info) 2479{ 2480 atemu *m = &info->emu; 2481 static char *msg[] = 2482 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR", 2483 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER", 2484 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"}; 2485 char s[ISDN_MSNLEN+10]; 2486 2487 switch (code) { 2488 case RESULT_RING: 2489 m->mdmreg[REG_RINGCNT]++; 2490 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA]) 2491 /* Automatically accept incoming call */ 2492 isdn_tty_cmd_ATA(info); 2493 break; 2494 case RESULT_NO_CARRIER: 2495#ifdef ISDN_DEBUG_MODEM_HUP 2496 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n", 2497 (info->flags & ISDN_ASYNC_CLOSING), 2498 (!info->tty)); 2499#endif 2500 m->mdmreg[REG_RINGCNT] = 0; 2501 del_timer(&info->nc_timer); 2502 info->ncarrier = 0; 2503 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) { 2504 return; 2505 } 2506#ifdef CONFIG_ISDN_AUDIO 2507 if (info->vonline & 1) { 2508#ifdef ISDN_DEBUG_MODEM_VOICE 2509 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n", 2510 info->line); 2511#endif 2512 /* voice-recording, add DLE-ETX */ 2513 isdn_tty_at_cout("\020\003", info); 2514 } 2515 if (info->vonline & 2) { 2516#ifdef ISDN_DEBUG_MODEM_VOICE 2517 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n", 2518 info->line); 2519#endif 2520 /* voice-playing, add DLE-DC4 */ 2521 isdn_tty_at_cout("\020\024", info); 2522 } 2523#endif 2524 break; 2525 case RESULT_CONNECT: 2526 case RESULT_CONNECT64000: 2527 sprintf(info->last_cause, "0000"); 2528 if (!info->online) 2529 info->online = 2; 2530 break; 2531 case RESULT_VCON: 2532#ifdef ISDN_DEBUG_MODEM_VOICE 2533 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n", 2534 info->line); 2535#endif 2536 sprintf(info->last_cause, "0000"); 2537 if (!info->online) 2538 info->online = 1; 2539 break; 2540 } /* switch(code) */ 2541 2542 if (m->mdmreg[REG_RESP] & BIT_RESP) { 2543 /* Show results */ 2544 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) { 2545 /* Show numeric results only */ 2546 sprintf(s, "\r\n%d\r\n", code); 2547 isdn_tty_at_cout(s, info); 2548 } else { 2549 if (code == RESULT_RING) { 2550 /* return if "show RUNG" and ringcounter>1 */ 2551 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) && 2552 (m->mdmreg[REG_RINGCNT] > 1)) 2553 return; 2554 /* print CID, _before_ _every_ ring */ 2555 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) { 2556 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info); 2557 isdn_tty_at_cout(dev->num[info->drv_index], info); 2558 if (m->mdmreg[REG_CDN] & BIT_CDN) { 2559 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info); 2560 isdn_tty_at_cout(info->emu.cpn, info); 2561 } 2562 } 2563 } 2564 isdn_tty_at_cout("\r\n", info); 2565 isdn_tty_at_cout(msg[code], info); 2566 switch (code) { 2567 case RESULT_CONNECT: 2568 switch (m->mdmreg[REG_L2PROT]) { 2569 case ISDN_PROTO_L2_MODEM: 2570 isdn_tty_at_cout(" ", info); 2571 isdn_tty_at_cout(m->connmsg, info); 2572 break; 2573 } 2574 break; 2575 case RESULT_RING: 2576 /* Append CPN, if enabled */ 2577 if ((m->mdmreg[REG_CPN] & BIT_CPN)) { 2578 sprintf(s, "/%s", m->cpn); 2579 isdn_tty_at_cout(s, info); 2580 } 2581 /* Print CID only once, _after_ 1st RING */ 2582 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) && 2583 (m->mdmreg[REG_RINGCNT] == 1)) { 2584 isdn_tty_at_cout("\r\n", info); 2585 isdn_tty_at_cout("CALLER NUMBER: ", info); 2586 isdn_tty_at_cout(dev->num[info->drv_index], info); 2587 if (m->mdmreg[REG_CDN] & BIT_CDN) { 2588 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info); 2589 isdn_tty_at_cout(info->emu.cpn, info); 2590 } 2591 } 2592 break; 2593 case RESULT_NO_CARRIER: 2594 case RESULT_NO_DIALTONE: 2595 case RESULT_BUSY: 2596 case RESULT_NO_ANSWER: 2597 m->mdmreg[REG_RINGCNT] = 0; 2598 /* Append Cause-Message if enabled */ 2599 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) { 2600 sprintf(s, "/%s", info->last_cause); 2601 isdn_tty_at_cout(s, info); 2602 } 2603 break; 2604 case RESULT_CONNECT64000: 2605 /* Append Protocol to CONNECT message */ 2606 switch (m->mdmreg[REG_L2PROT]) { 2607 case ISDN_PROTO_L2_X75I: 2608 case ISDN_PROTO_L2_X75UI: 2609 case ISDN_PROTO_L2_X75BUI: 2610 isdn_tty_at_cout("/X.75", info); 2611 break; 2612 case ISDN_PROTO_L2_HDLC: 2613 isdn_tty_at_cout("/HDLC", info); 2614 break; 2615 case ISDN_PROTO_L2_V11096: 2616 isdn_tty_at_cout("/V110/9600", info); 2617 break; 2618 case ISDN_PROTO_L2_V11019: 2619 isdn_tty_at_cout("/V110/19200", info); 2620 break; 2621 case ISDN_PROTO_L2_V11038: 2622 isdn_tty_at_cout("/V110/38400", info); 2623 break; 2624 } 2625 if (m->mdmreg[REG_T70] & BIT_T70) { 2626 isdn_tty_at_cout("/T.70", info); 2627 if (m->mdmreg[REG_T70] & BIT_T70_EXT) 2628 isdn_tty_at_cout("+", info); 2629 } 2630 break; 2631 } 2632 isdn_tty_at_cout("\r\n", info); 2633 } 2634 } 2635 if (code == RESULT_NO_CARRIER) { 2636 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) { 2637 return; 2638 } 2639 if ((info->flags & ISDN_ASYNC_CHECK_CD) && 2640 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) && 2641 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) { 2642 tty_hangup(info->tty); 2643 } 2644 } 2645} 2646 2647 2648/* 2649 * Display a modem-register-value. 2650 */ 2651static void 2652isdn_tty_show_profile(int ridx, modem_info * info) 2653{ 2654 char v[6]; 2655 2656 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]); 2657 isdn_tty_at_cout(v, info); 2658} 2659 2660/* 2661 * Get MSN-string from char-pointer, set pointer to end of number 2662 */ 2663static void 2664isdn_tty_get_msnstr(char *n, char **p) 2665{ 2666 int limit = ISDN_MSNLEN - 1; 2667 2668 while (((*p[0] >= '0' && *p[0] <= '9') || 2669 /* Why a comma ??? */ 2670 (*p[0] == ',') || (*p[0] == ':')) && 2671 (limit--)) 2672 *n++ = *p[0]++; 2673 *n = '\0'; 2674} 2675 2676/* 2677 * Get phone-number from modem-commandbuffer 2678 */ 2679static void 2680isdn_tty_getdial(char *p, char *q,int cnt) 2681{ 2682 int first = 1; 2683 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid 2684 buffer overflow */ 2685 2686 while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) { 2687 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) || 2688 ((*p == 'R') && first) || 2689 (*p == '*') || (*p == '#')) { 2690 *q++ = *p; 2691 limit--; 2692 } 2693 if(!limit) 2694 break; 2695 p++; 2696 first = 0; 2697 } 2698 *q = 0; 2699} 2700 2701#define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; } 2702#define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; } 2703 2704static void 2705isdn_tty_report(modem_info * info) 2706{ 2707 atemu *m = &info->emu; 2708 char s[80]; 2709 2710 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info); 2711 sprintf(s, " Remote Number: %s\r\n", info->last_num); 2712 isdn_tty_at_cout(s, info); 2713 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming"); 2714 isdn_tty_at_cout(s, info); 2715 isdn_tty_at_cout(" Layer-2 Protocol: ", info); 2716 switch (info->last_l2) { 2717 case ISDN_PROTO_L2_X75I: 2718 isdn_tty_at_cout("X.75i", info); 2719 break; 2720 case ISDN_PROTO_L2_X75UI: 2721 isdn_tty_at_cout("X.75ui", info); 2722 break; 2723 case ISDN_PROTO_L2_X75BUI: 2724 isdn_tty_at_cout("X.75bui", info); 2725 break; 2726 case ISDN_PROTO_L2_HDLC: 2727 isdn_tty_at_cout("HDLC", info); 2728 break; 2729 case ISDN_PROTO_L2_V11096: 2730 isdn_tty_at_cout("V.110 9600 Baud", info); 2731 break; 2732 case ISDN_PROTO_L2_V11019: 2733 isdn_tty_at_cout("V.110 19200 Baud", info); 2734 break; 2735 case ISDN_PROTO_L2_V11038: 2736 isdn_tty_at_cout("V.110 38400 Baud", info); 2737 break; 2738 case ISDN_PROTO_L2_TRANS: 2739 isdn_tty_at_cout("transparent", info); 2740 break; 2741 case ISDN_PROTO_L2_MODEM: 2742 isdn_tty_at_cout("modem", info); 2743 break; 2744 case ISDN_PROTO_L2_FAX: 2745 isdn_tty_at_cout("fax", info); 2746 break; 2747 default: 2748 isdn_tty_at_cout("unknown", info); 2749 break; 2750 } 2751 if (m->mdmreg[REG_T70] & BIT_T70) { 2752 isdn_tty_at_cout("/T.70", info); 2753 if (m->mdmreg[REG_T70] & BIT_T70_EXT) 2754 isdn_tty_at_cout("+", info); 2755 } 2756 isdn_tty_at_cout("\r\n", info); 2757 isdn_tty_at_cout(" Service: ", info); 2758 switch (info->last_si) { 2759 case 1: 2760 isdn_tty_at_cout("audio\r\n", info); 2761 break; 2762 case 5: 2763 isdn_tty_at_cout("btx\r\n", info); 2764 break; 2765 case 7: 2766 isdn_tty_at_cout("data\r\n", info); 2767 break; 2768 default: 2769 sprintf(s, "%d\r\n", info->last_si); 2770 isdn_tty_at_cout(s, info); 2771 break; 2772 } 2773 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote"); 2774 isdn_tty_at_cout(s, info); 2775 sprintf(s, " Last cause: %s\r\n", info->last_cause); 2776 isdn_tty_at_cout(s, info); 2777} 2778 2779/* 2780 * Parse AT&.. commands. 2781 */ 2782static int 2783isdn_tty_cmd_ATand(char **p, modem_info * info) 2784{ 2785 atemu *m = &info->emu; 2786 int i; 2787 char rb[100]; 2788 2789#define MAXRB (sizeof(rb) - 1) 2790 2791 switch (*p[0]) { 2792 case 'B': 2793 /* &B - Set Buffersize */ 2794 p[0]++; 2795 i = isdn_getnum(p); 2796 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX)) 2797 PARSE_ERROR1; 2798#ifdef CONFIG_ISDN_AUDIO 2799 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF)) 2800 PARSE_ERROR1; 2801#endif 2802 m->mdmreg[REG_PSIZE] = i / 16; 2803 info->xmit_size = m->mdmreg[REG_PSIZE] * 16; 2804 switch (m->mdmreg[REG_L2PROT]) { 2805 case ISDN_PROTO_L2_V11096: 2806 case ISDN_PROTO_L2_V11019: 2807 case ISDN_PROTO_L2_V11038: 2808 info->xmit_size /= 10; 2809 } 2810 break; 2811 case 'C': 2812 /* &C - DCD Status */ 2813 p[0]++; 2814 switch (isdn_getnum(p)) { 2815 case 0: 2816 m->mdmreg[REG_DCD] &= ~BIT_DCD; 2817 break; 2818 case 1: 2819 m->mdmreg[REG_DCD] |= BIT_DCD; 2820 break; 2821 default: 2822 PARSE_ERROR1 2823 } 2824 break; 2825 case 'D': 2826 /* &D - Set DTR-Low-behavior */ 2827 p[0]++; 2828 switch (isdn_getnum(p)) { 2829 case 0: 2830 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP; 2831 m->mdmreg[REG_DTRR] &= ~BIT_DTRR; 2832 break; 2833 case 2: 2834 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP; 2835 m->mdmreg[REG_DTRR] &= ~BIT_DTRR; 2836 break; 2837 case 3: 2838 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP; 2839 m->mdmreg[REG_DTRR] |= BIT_DTRR; 2840 break; 2841 default: 2842 PARSE_ERROR1 2843 } 2844 break; 2845 case 'E': 2846 /* &E -Set EAZ/MSN */ 2847 p[0]++; 2848 isdn_tty_get_msnstr(m->msn, p); 2849 break; 2850 case 'F': 2851 /* &F -Set Factory-Defaults */ 2852 p[0]++; 2853 if (info->msr & UART_MSR_DCD) 2854 PARSE_ERROR1; 2855 isdn_tty_reset_profile(m); 2856 isdn_tty_modem_reset_regs(info, 1); 2857 break; 2858#ifdef DUMMY_HAYES_AT 2859 case 'K': 2860 /* only for be compilant with common scripts */ 2861 /* &K Flowcontrol - no function */ 2862 p[0]++; 2863 isdn_getnum(p); 2864 break; 2865#endif 2866 case 'L': 2867 /* &L -Set Numbers to listen on */ 2868 p[0]++; 2869 i = 0; 2870 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) && 2871 (i < ISDN_LMSNLEN - 1)) 2872 m->lmsn[i++] = *p[0]++; 2873 m->lmsn[i] = '\0'; 2874 break; 2875 case 'R': 2876 /* &R - Set V.110 bitrate adaption */ 2877 p[0]++; 2878 i = isdn_getnum(p); 2879 switch (i) { 2880 case 0: 2881 /* Switch off V.110, back to X.75 */ 2882 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; 2883 m->mdmreg[REG_SI2] = 0; 2884 info->xmit_size = m->mdmreg[REG_PSIZE] * 16; 2885 break; 2886 case 9600: 2887 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096; 2888 m->mdmreg[REG_SI2] = 197; 2889 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10; 2890 break; 2891 case 19200: 2892 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019; 2893 m->mdmreg[REG_SI2] = 199; 2894 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10; 2895 break; 2896 case 38400: 2897 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038; 2898 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */ 2899 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10; 2900 break; 2901 default: 2902 PARSE_ERROR1; 2903 } 2904 /* Switch off T.70 */ 2905 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT); 2906 /* Set Service 7 */ 2907 m->mdmreg[REG_SI1] |= 4; 2908 break; 2909 case 'S': 2910 /* &S - Set Windowsize */ 2911 p[0]++; 2912 i = isdn_getnum(p); 2913 if ((i > 0) && (i < 9)) 2914 m->mdmreg[REG_WSIZE] = i; 2915 else 2916 PARSE_ERROR1; 2917 break; 2918 case 'V': 2919 /* &V - Show registers */ 2920 p[0]++; 2921 isdn_tty_at_cout("\r\n", info); 2922 for (i = 0; i < ISDN_MODEM_NUMREG; i++) { 2923 sprintf(rb, "S%02d=%03d%s", i, 2924 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n"); 2925 isdn_tty_at_cout(rb, info); 2926 } 2927 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n", 2928 strlen(m->msn) ? m->msn : "None"); 2929 isdn_tty_at_cout(rb, info); 2930 if (strlen(m->lmsn)) { 2931 isdn_tty_at_cout("\r\nListen: ", info); 2932 isdn_tty_at_cout(m->lmsn, info); 2933 isdn_tty_at_cout("\r\n", info); 2934 } 2935 break; 2936 case 'W': 2937 /* &W - Write Profile */ 2938 p[0]++; 2939 switch (*p[0]) { 2940 case '0': 2941 p[0]++; 2942 modem_write_profile(m); 2943 break; 2944 default: 2945 PARSE_ERROR1; 2946 } 2947 break; 2948 case 'X': 2949 /* &X - Switch to BTX-Mode and T.70 */ 2950 p[0]++; 2951 switch (isdn_getnum(p)) { 2952 case 0: 2953 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT); 2954 info->xmit_size = m->mdmreg[REG_PSIZE] * 16; 2955 break; 2956 case 1: 2957 m->mdmreg[REG_T70] |= BIT_T70; 2958 m->mdmreg[REG_T70] &= ~BIT_T70_EXT; 2959 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; 2960 info->xmit_size = 112; 2961 m->mdmreg[REG_SI1] = 4; 2962 m->mdmreg[REG_SI2] = 0; 2963 break; 2964 case 2: 2965 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT); 2966 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; 2967 info->xmit_size = 112; 2968 m->mdmreg[REG_SI1] = 4; 2969 m->mdmreg[REG_SI2] = 0; 2970 break; 2971 default: 2972 PARSE_ERROR1; 2973 } 2974 break; 2975 default: 2976 PARSE_ERROR1; 2977 } 2978 return 0; 2979} 2980 2981static int 2982isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m) 2983{ 2984 /* Some plausibility checks */ 2985 switch (mreg) { 2986 case REG_L2PROT: 2987 if (mval > ISDN_PROTO_L2_MAX) 2988 return 1; 2989 break; 2990 case REG_PSIZE: 2991 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX) 2992 return 1; 2993#ifdef CONFIG_ISDN_AUDIO 2994 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX)) 2995 return 1; 2996#endif 2997 info->xmit_size = mval * 16; 2998 switch (m->mdmreg[REG_L2PROT]) { 2999 case ISDN_PROTO_L2_V11096: 3000 case ISDN_PROTO_L2_V11019: 3001 case ISDN_PROTO_L2_V11038: 3002 info->xmit_size /= 10; 3003 } 3004 break; 3005 case REG_SI1I: 3006 case REG_PLAN: 3007 case REG_SCREEN: 3008 /* readonly registers */ 3009 return 1; 3010 } 3011 return 0; 3012} 3013 3014/* 3015 * Perform ATS command 3016 */ 3017static int 3018isdn_tty_cmd_ATS(char **p, modem_info * info) 3019{ 3020 atemu *m = &info->emu; 3021 int bitpos; 3022 int mreg; 3023 int mval; 3024 int bval; 3025 3026 mreg = isdn_getnum(p); 3027 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG) 3028 PARSE_ERROR1; 3029 switch (*p[0]) { 3030 case '=': 3031 p[0]++; 3032 mval = isdn_getnum(p); 3033 if (mval < 0 || mval > 255) 3034 PARSE_ERROR1; 3035 if (isdn_tty_check_ats(mreg, mval, info, m)) 3036 PARSE_ERROR1; 3037 m->mdmreg[mreg] = mval; 3038 break; 3039 case '.': 3040 /* Set/Clear a single bit */ 3041 p[0]++; 3042 bitpos = isdn_getnum(p); 3043 if ((bitpos < 0) || (bitpos > 7)) 3044 PARSE_ERROR1; 3045 switch (*p[0]) { 3046 case '=': 3047 p[0]++; 3048 bval = isdn_getnum(p); 3049 if (bval < 0 || bval > 1) 3050 PARSE_ERROR1; 3051 if (bval) 3052 mval = m->mdmreg[mreg] | (1 << bitpos); 3053 else 3054 mval = m->mdmreg[mreg] & ~(1 << bitpos); 3055 if (isdn_tty_check_ats(mreg, mval, info, m)) 3056 PARSE_ERROR1; 3057 m->mdmreg[mreg] = mval; 3058 break; 3059 case '?': 3060 p[0]++; 3061 isdn_tty_at_cout("\r\n", info); 3062 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0", 3063 info); 3064 break; 3065 default: 3066 PARSE_ERROR1; 3067 } 3068 break; 3069 case '?': 3070 p[0]++; 3071 isdn_tty_show_profile(mreg, info); 3072 break; 3073 default: 3074 PARSE_ERROR1; 3075 break; 3076 } 3077 return 0; 3078} 3079 3080/* 3081 * Perform ATA command 3082 */ 3083static void 3084isdn_tty_cmd_ATA(modem_info * info) 3085{ 3086 atemu *m = &info->emu; 3087 isdn_ctrl cmd; 3088 int l2; 3089 3090 if (info->msr & UART_MSR_RI) { 3091 /* Accept incoming call */ 3092 info->last_dir = 0; 3093 strcpy(info->last_num, dev->num[info->drv_index]); 3094 m->mdmreg[REG_RINGCNT] = 0; 3095 info->msr &= ~UART_MSR_RI; 3096 l2 = m->mdmreg[REG_L2PROT]; 3097#ifdef CONFIG_ISDN_AUDIO 3098 /* If more than one bit set in reg18, autoselect Layer2 */ 3099 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) { 3100 if (m->mdmreg[REG_SI1I] == 1) { 3101 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX)) 3102 l2 = ISDN_PROTO_L2_TRANS; 3103 } else 3104 l2 = ISDN_PROTO_L2_X75I; 3105 } 3106#endif 3107 cmd.driver = info->isdn_driver; 3108 cmd.command = ISDN_CMD_SETL2; 3109 cmd.arg = info->isdn_channel + (l2 << 8); 3110 info->last_l2 = l2; 3111 isdn_command(&cmd); 3112 cmd.driver = info->isdn_driver; 3113 cmd.command = ISDN_CMD_SETL3; 3114 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8); 3115#ifdef CONFIG_ISDN_TTY_FAX 3116 if (l2 == ISDN_PROTO_L2_FAX) { 3117 cmd.parm.fax = info->fax; 3118 info->fax->direction = ISDN_TTY_FAX_CONN_IN; 3119 } 3120#endif 3121 isdn_command(&cmd); 3122 cmd.driver = info->isdn_driver; 3123 cmd.arg = info->isdn_channel; 3124 cmd.command = ISDN_CMD_ACCEPTD; 3125 info->dialing = 16; 3126 info->emu.carrierwait = 0; 3127 isdn_command(&cmd); 3128 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1); 3129 } else 3130 isdn_tty_modem_result(RESULT_NO_ANSWER, info); 3131} 3132 3133#ifdef CONFIG_ISDN_AUDIO 3134/* 3135 * Parse AT+F.. commands 3136 */ 3137static int 3138isdn_tty_cmd_PLUSF(char **p, modem_info * info) 3139{ 3140 atemu *m = &info->emu; 3141 char rs[20]; 3142 3143 if (!strncmp(p[0], "CLASS", 5)) { 3144 p[0] += 5; 3145 switch (*p[0]) { 3146 case '?': 3147 p[0]++; 3148 sprintf(rs, "\r\n%d", 3149 (m->mdmreg[REG_SI1] & 1) ? 8 : 0); 3150#ifdef CONFIG_ISDN_TTY_FAX 3151 if (TTY_IS_FCLASS2(info)) 3152 sprintf(rs, "\r\n2"); 3153 else if (TTY_IS_FCLASS1(info)) 3154 sprintf(rs, "\r\n1"); 3155#endif 3156 isdn_tty_at_cout(rs, info); 3157 break; 3158 case '=': 3159 p[0]++; 3160 switch (*p[0]) { 3161 case '0': 3162 p[0]++; 3163 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; 3164 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS; 3165 m->mdmreg[REG_SI1] = 4; 3166 info->xmit_size = 3167 m->mdmreg[REG_PSIZE] * 16; 3168 break; 3169#ifdef CONFIG_ISDN_TTY_FAX 3170 case '1': 3171 p[0]++; 3172 if (!(dev->global_features & 3173 ISDN_FEATURE_L3_FCLASS1)) 3174 PARSE_ERROR1; 3175 m->mdmreg[REG_SI1] = 1; 3176 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX; 3177 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1; 3178 info->xmit_size = 3179 m->mdmreg[REG_PSIZE] * 16; 3180 break; 3181 case '2': 3182 p[0]++; 3183 if (!(dev->global_features & 3184 ISDN_FEATURE_L3_FCLASS2)) 3185 PARSE_ERROR1; 3186 m->mdmreg[REG_SI1] = 1; 3187 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX; 3188 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2; 3189 info->xmit_size = 3190 m->mdmreg[REG_PSIZE] * 16; 3191 break; 3192#endif 3193 case '8': 3194 p[0]++; 3195 /* L2 will change on dialout with si=1 */ 3196 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; 3197 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS; 3198 m->mdmreg[REG_SI1] = 5; 3199 info->xmit_size = VBUF; 3200 break; 3201 case '?': 3202 p[0]++; 3203 strcpy(rs, "\r\n0,"); 3204#ifdef CONFIG_ISDN_TTY_FAX 3205 if (dev->global_features & 3206 ISDN_FEATURE_L3_FCLASS1) 3207 strcat(rs, "1,"); 3208 if (dev->global_features & 3209 ISDN_FEATURE_L3_FCLASS2) 3210 strcat(rs, "2,"); 3211#endif 3212 strcat(rs, "8"); 3213 isdn_tty_at_cout(rs, info); 3214 break; 3215 default: 3216 PARSE_ERROR1; 3217 } 3218 break; 3219 default: 3220 PARSE_ERROR1; 3221 } 3222 return 0; 3223 } 3224#ifdef CONFIG_ISDN_TTY_FAX 3225 return (isdn_tty_cmd_PLUSF_FAX(p, info)); 3226#else 3227 PARSE_ERROR1; 3228#endif 3229} 3230 3231/* 3232 * Parse AT+V.. commands 3233 */ 3234static int 3235isdn_tty_cmd_PLUSV(char **p, modem_info * info) 3236{ 3237 atemu *m = &info->emu; 3238 isdn_ctrl cmd; 3239 static char *vcmd[] = 3240 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL}; 3241 int i; 3242 int par1; 3243 int par2; 3244 char rs[20]; 3245 3246 i = 0; 3247 while (vcmd[i]) { 3248 if (!strncmp(vcmd[i], p[0], 2)) { 3249 p[0] += 2; 3250 break; 3251 } 3252 i++; 3253 } 3254 switch (i) { 3255 case 0: 3256 /* AT+VNH - Auto hangup feature */ 3257 switch (*p[0]) { 3258 case '?': 3259 p[0]++; 3260 isdn_tty_at_cout("\r\n1", info); 3261 break; 3262 case '=': 3263 p[0]++; 3264 switch (*p[0]) { 3265 case '1': 3266 p[0]++; 3267 break; 3268 case '?': 3269 p[0]++; 3270 isdn_tty_at_cout("\r\n1", info); 3271 break; 3272 default: 3273 PARSE_ERROR1; 3274 } 3275 break; 3276 default: 3277 PARSE_ERROR1; 3278 } 3279 break; 3280 case 1: 3281 /* AT+VIP - Reset all voice parameters */ 3282 isdn_tty_modem_reset_vpar(m); 3283 break; 3284 case 2: 3285 /* AT+VLS - Select device, accept incoming call */ 3286 switch (*p[0]) { 3287 case '?': 3288 p[0]++; 3289 sprintf(rs, "\r\n%d", m->vpar[0]); 3290 isdn_tty_at_cout(rs, info); 3291 break; 3292 case '=': 3293 p[0]++; 3294 switch (*p[0]) { 3295 case '0': 3296 p[0]++; 3297 m->vpar[0] = 0; 3298 break; 3299 case '2': 3300 p[0]++; 3301 m->vpar[0] = 2; 3302 break; 3303 case '?': 3304 p[0]++; 3305 isdn_tty_at_cout("\r\n0,2", info); 3306 break; 3307 default: 3308 PARSE_ERROR1; 3309 } 3310 break; 3311 default: 3312 PARSE_ERROR1; 3313 } 3314 break; 3315 case 3: 3316 /* AT+VRX - Start recording */ 3317 if (!m->vpar[0]) 3318 PARSE_ERROR1; 3319 if (info->online != 1) { 3320 isdn_tty_modem_result(RESULT_NO_ANSWER, info); 3321 return 1; 3322 } 3323 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state); 3324 if (!info->dtmf_state) { 3325 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n"); 3326 PARSE_ERROR1; 3327 } 3328 info->silence_state = isdn_audio_silence_init(info->silence_state); 3329 if (!info->silence_state) { 3330 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n"); 3331 PARSE_ERROR1; 3332 } 3333 if (m->vpar[3] < 5) { 3334 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]); 3335 if (!info->adpcmr) { 3336 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n"); 3337 PARSE_ERROR1; 3338 } 3339 } 3340#ifdef ISDN_DEBUG_AT 3341 printk(KERN_DEBUG "AT: +VRX\n"); 3342#endif 3343 info->vonline |= 1; 3344 isdn_tty_modem_result(RESULT_CONNECT, info); 3345 return 0; 3346 break; 3347 case 4: 3348 /* AT+VSD - Silence detection */ 3349 switch (*p[0]) { 3350 case '?': 3351 p[0]++; 3352 sprintf(rs, "\r\n<%d>,<%d>", 3353 m->vpar[1], 3354 m->vpar[2]); 3355 isdn_tty_at_cout(rs, info); 3356 break; 3357 case '=': 3358 p[0]++; 3359 if ((*p[0]>='0') && (*p[0]<='9')) { 3360 par1 = isdn_getnum(p); 3361 if ((par1 < 0) || (par1 > 31)) 3362 PARSE_ERROR1; 3363 if (*p[0] != ',') 3364 PARSE_ERROR1; 3365 p[0]++; 3366 par2 = isdn_getnum(p); 3367 if ((par2 < 0) || (par2 > 255)) 3368 PARSE_ERROR1; 3369 m->vpar[1] = par1; 3370 m->vpar[2] = par2; 3371 break; 3372 } else 3373 if (*p[0] == '?') { 3374 p[0]++; 3375 isdn_tty_at_cout("\r\n<0-31>,<0-255>", 3376 info); 3377 break; 3378 } else 3379 PARSE_ERROR1; 3380 break; 3381 default: 3382 PARSE_ERROR1; 3383 } 3384 break; 3385 case 5: 3386 /* AT+VSM - Select compression */ 3387 switch (*p[0]) { 3388 case '?': 3389 p[0]++; 3390 sprintf(rs, "\r\n<%d>,<%d><8000>", 3391 m->vpar[3], 3392 m->vpar[1]); 3393 isdn_tty_at_cout(rs, info); 3394 break; 3395 case '=': 3396 p[0]++; 3397 switch (*p[0]) { 3398 case '2': 3399 case '3': 3400 case '4': 3401 case '5': 3402 case '6': 3403 par1 = isdn_getnum(p); 3404 if ((par1 < 2) || (par1 > 6)) 3405 PARSE_ERROR1; 3406 m->vpar[3] = par1; 3407 break; 3408 case '?': 3409 p[0]++; 3410 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n", 3411 info); 3412 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n", 3413 info); 3414 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n", 3415 info); 3416 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n", 3417 info); 3418 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n", 3419 info); 3420 break; 3421 default: 3422 PARSE_ERROR1; 3423 } 3424 break; 3425 default: 3426 PARSE_ERROR1; 3427 } 3428 break; 3429 case 6: 3430 /* AT+VTX - Start sending */ 3431 if (!m->vpar[0]) 3432 PARSE_ERROR1; 3433 if (info->online != 1) { 3434 isdn_tty_modem_result(RESULT_NO_ANSWER, info); 3435 return 1; 3436 } 3437 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state); 3438 if (!info->dtmf_state) { 3439 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n"); 3440 PARSE_ERROR1; 3441 } 3442 if (m->vpar[3] < 5) { 3443 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]); 3444 if (!info->adpcms) { 3445 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n"); 3446 PARSE_ERROR1; 3447 } 3448 } 3449#ifdef ISDN_DEBUG_AT 3450 printk(KERN_DEBUG "AT: +VTX\n"); 3451#endif 3452 m->lastDLE = 0; 3453 info->vonline |= 2; 3454 isdn_tty_modem_result(RESULT_CONNECT, info); 3455 return 0; 3456 break; 3457 case 7: 3458 /* AT+VDD - DTMF detection */ 3459 switch (*p[0]) { 3460 case '?': 3461 p[0]++; 3462 sprintf(rs, "\r\n<%d>,<%d>", 3463 m->vpar[4], 3464 m->vpar[5]); 3465 isdn_tty_at_cout(rs, info); 3466 break; 3467 case '=': 3468 p[0]++; 3469 if ((*p[0]>='0') && (*p[0]<='9')) { 3470 if (info->online != 1) 3471 PARSE_ERROR1; 3472 par1 = isdn_getnum(p); 3473 if ((par1 < 0) || (par1 > 15)) 3474 PARSE_ERROR1; 3475 if (*p[0] != ',') 3476 PARSE_ERROR1; 3477 p[0]++; 3478 par2 = isdn_getnum(p); 3479 if ((par2 < 0) || (par2 > 255)) 3480 PARSE_ERROR1; 3481 m->vpar[4] = par1; 3482 m->vpar[5] = par2; 3483 cmd.driver = info->isdn_driver; 3484 cmd.command = ISDN_CMD_AUDIO; 3485 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8); 3486 cmd.parm.num[0] = par1; 3487 cmd.parm.num[1] = par2; 3488 isdn_command(&cmd); 3489 break; 3490 } else 3491 if (*p[0] == '?') { 3492 p[0]++; 3493 isdn_tty_at_cout("\r\n<0-15>,<0-255>", 3494 info); 3495 break; 3496 } else 3497 PARSE_ERROR1; 3498 break; 3499 default: 3500 PARSE_ERROR1; 3501 } 3502 break; 3503 default: 3504 PARSE_ERROR1; 3505 } 3506 return 0; 3507} 3508#endif /* CONFIG_ISDN_AUDIO */ 3509 3510/* 3511 * Parse and perform an AT-command-line. 3512 */ 3513static void 3514isdn_tty_parse_at(modem_info * info) 3515{ 3516 atemu *m = &info->emu; 3517 char *p; 3518 char ds[ISDN_MSNLEN]; 3519 3520#ifdef ISDN_DEBUG_AT 3521 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd); 3522#endif 3523 for (p = &m->mdmcmd[2]; *p;) { 3524 switch (*p) { 3525 case ' ': 3526 p++; 3527 break; 3528 case 'A': 3529 /* A - Accept incoming call */ 3530 p++; 3531 isdn_tty_cmd_ATA(info); 3532 return; 3533 break; 3534 case 'D': 3535 /* D - Dial */ 3536 if (info->msr & UART_MSR_DCD) 3537 PARSE_ERROR; 3538 if (info->msr & UART_MSR_RI) { 3539 isdn_tty_modem_result(RESULT_NO_CARRIER, info); 3540 return; 3541 } 3542 isdn_tty_getdial(++p, ds, sizeof ds); 3543 p += strlen(p); 3544 if (!strlen(m->msn)) 3545 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info); 3546 else if (strlen(ds)) 3547 isdn_tty_dial(ds, info, m); 3548 else 3549 PARSE_ERROR; 3550 return; 3551 case 'E': 3552 /* E - Turn Echo on/off */ 3553 p++; 3554 switch (isdn_getnum(&p)) { 3555 case 0: 3556 m->mdmreg[REG_ECHO] &= ~BIT_ECHO; 3557 break; 3558 case 1: 3559 m->mdmreg[REG_ECHO] |= BIT_ECHO; 3560 break; 3561 default: 3562 PARSE_ERROR; 3563 } 3564 break; 3565 case 'H': 3566 /* H - On/Off-hook */ 3567 p++; 3568 switch (*p) { 3569 case '0': 3570 p++; 3571 isdn_tty_on_hook(info); 3572 break; 3573 case '1': 3574 p++; 3575 isdn_tty_off_hook(); 3576 break; 3577 default: 3578 isdn_tty_on_hook(info); 3579 break; 3580 } 3581 break; 3582 case 'I': 3583 /* I - Information */ 3584 p++; 3585 isdn_tty_at_cout("\r\nLinux ISDN", info); 3586 switch (*p) { 3587 case '0': 3588 case '1': 3589 p++; 3590 break; 3591 case '2': 3592 p++; 3593 isdn_tty_report(info); 3594 break; 3595 case '3': 3596 p++; 3597 snprintf(ds, sizeof(ds), "\r\n%d", info->emu.charge); 3598 isdn_tty_at_cout(ds, info); 3599 break; 3600 default:; 3601 } 3602 break; 3603#ifdef DUMMY_HAYES_AT 3604 case 'L': 3605 case 'M': 3606 /* only for be compilant with common scripts */ 3607 /* no function */ 3608 p++; 3609 isdn_getnum(&p); 3610 break; 3611#endif 3612 case 'O': 3613 /* O - Go online */ 3614 p++; 3615 if (info->msr & UART_MSR_DCD) 3616 /* if B-Channel is up */ 3617 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info); 3618 else 3619 isdn_tty_modem_result(RESULT_NO_CARRIER, info); 3620 return; 3621 case 'Q': 3622 /* Q - Turn Emulator messages on/off */ 3623 p++; 3624 switch (isdn_getnum(&p)) { 3625 case 0: 3626 m->mdmreg[REG_RESP] |= BIT_RESP; 3627 break; 3628 case 1: 3629 m->mdmreg[REG_RESP] &= ~BIT_RESP; 3630 break; 3631 default: 3632 PARSE_ERROR; 3633 } 3634 break; 3635 case 'S': 3636 /* S - Set/Get Register */ 3637 p++; 3638 if (isdn_tty_cmd_ATS(&p, info)) 3639 return; 3640 break; 3641 case 'V': 3642 /* V - Numeric or ASCII Emulator-messages */ 3643 p++; 3644 switch (isdn_getnum(&p)) { 3645 case 0: 3646 m->mdmreg[REG_RESP] |= BIT_RESPNUM; 3647 break; 3648 case 1: 3649 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM; 3650 break; 3651 default: 3652 PARSE_ERROR; 3653 } 3654 break; 3655 case 'Z': 3656 /* Z - Load Registers from Profile */ 3657 p++; 3658 if (info->msr & UART_MSR_DCD) { 3659 info->online = 0; 3660 isdn_tty_on_hook(info); 3661 } 3662 isdn_tty_modem_reset_regs(info, 1); 3663 break; 3664 case '+': 3665 p++; 3666 switch (*p) { 3667#ifdef CONFIG_ISDN_AUDIO 3668 case 'F': 3669 p++; 3670 if (isdn_tty_cmd_PLUSF(&p, info)) 3671 return; 3672 break; 3673 case 'V': 3674 if ((!(m->mdmreg[REG_SI1] & 1)) || 3675 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM)) 3676 PARSE_ERROR; 3677 p++; 3678 if (isdn_tty_cmd_PLUSV(&p, info)) 3679 return; 3680 break; 3681#endif /* CONFIG_ISDN_AUDIO */ 3682 case 'S': /* SUSPEND */ 3683 p++; 3684 isdn_tty_get_msnstr(ds, &p); 3685 isdn_tty_suspend(ds, info, m); 3686 break; 3687 case 'R': /* RESUME */ 3688 p++; 3689 isdn_tty_get_msnstr(ds, &p); 3690 isdn_tty_resume(ds, info, m); 3691 break; 3692 case 'M': /* MESSAGE */ 3693 p++; 3694 isdn_tty_send_msg(info, m, p); 3695 break; 3696 default: 3697 PARSE_ERROR; 3698 } 3699 break; 3700 case '&': 3701 p++; 3702 if (isdn_tty_cmd_ATand(&p, info)) 3703 return; 3704 break; 3705 default: 3706 PARSE_ERROR; 3707 } 3708 } 3709#ifdef CONFIG_ISDN_AUDIO 3710 if (!info->vonline) 3711#endif 3712 isdn_tty_modem_result(RESULT_OK, info); 3713} 3714 3715/* Need own toupper() because standard-toupper is not available 3716 * within modules. 3717 */ 3718#define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c) 3719 3720/* 3721 * Perform line-editing of AT-commands 3722 * 3723 * Parameters: 3724 * p inputbuffer 3725 * count length of buffer 3726 * channel index to line (minor-device) 3727 */ 3728static int 3729isdn_tty_edit_at(const char *p, int count, modem_info * info) 3730{ 3731 atemu *m = &info->emu; 3732 int total = 0; 3733 u_char c; 3734 char eb[2]; 3735 int cnt; 3736 3737 for (cnt = count; cnt > 0; p++, cnt--) { 3738 c = *p; 3739 total++; 3740 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) { 3741 /* Separator (CR or LF) */ 3742 m->mdmcmd[m->mdmcmdl] = 0; 3743 if (m->mdmreg[REG_ECHO] & BIT_ECHO) { 3744 eb[0] = c; 3745 eb[1] = 0; 3746 isdn_tty_at_cout(eb, info); 3747 } 3748 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2)))) 3749 isdn_tty_parse_at(info); 3750 m->mdmcmdl = 0; 3751 continue; 3752 } 3753 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) { 3754 /* Backspace-Function */ 3755 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) { 3756 if (m->mdmcmdl) 3757 m->mdmcmdl--; 3758 if (m->mdmreg[REG_ECHO] & BIT_ECHO) 3759 isdn_tty_at_cout("\b", info); 3760 } 3761 continue; 3762 } 3763 if (cmdchar(c)) { 3764 if (m->mdmreg[REG_ECHO] & BIT_ECHO) { 3765 eb[0] = c; 3766 eb[1] = 0; 3767 isdn_tty_at_cout(eb, info); 3768 } 3769 if (m->mdmcmdl < 255) { 3770 c = my_toupper(c); 3771 switch (m->mdmcmdl) { 3772 case 1: 3773 if (c == 'T') { 3774 m->mdmcmd[m->mdmcmdl] = c; 3775 m->mdmcmd[++m->mdmcmdl] = 0; 3776 break; 3777 } else 3778 m->mdmcmdl = 0; 3779 /* Fall through, check for 'A' */ 3780 case 0: 3781 if (c == 'A') { 3782 m->mdmcmd[m->mdmcmdl] = c; 3783 m->mdmcmd[++m->mdmcmdl] = 0; 3784 } 3785 break; 3786 default: 3787 m->mdmcmd[m->mdmcmdl] = c; 3788 m->mdmcmd[++m->mdmcmdl] = 0; 3789 } 3790 } 3791 } 3792 } 3793 return total; 3794} 3795 3796/* 3797 * Switch all modem-channels who are online and got a valid 3798 * escape-sequence 1.5 seconds ago, to command-mode. 3799 * This function is called every second via timer-interrupt from within 3800 * timer-dispatcher isdn_timer_function() 3801 */ 3802void 3803isdn_tty_modem_escape(void) 3804{ 3805 int ton = 0; 3806 int i; 3807 int midx; 3808 3809 for (i = 0; i < ISDN_MAX_CHANNELS; i++) 3810 if (USG_MODEM(dev->usage[i])) 3811 if ((midx = dev->m_idx[i]) >= 0) { 3812 modem_info *info = &dev->mdm.info[midx]; 3813 if (info->online) { 3814 ton = 1; 3815 if ((info->emu.pluscount == 3) && 3816 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) { 3817 info->emu.pluscount = 0; 3818 info->online = 0; 3819 isdn_tty_modem_result(RESULT_OK, info); 3820 } 3821 } 3822 } 3823 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton); 3824} 3825 3826/* 3827 * Put a RING-message to all modem-channels who have the RI-bit set. 3828 * This function is called every second via timer-interrupt from within 3829 * timer-dispatcher isdn_timer_function() 3830 */ 3831void 3832isdn_tty_modem_ring(void) 3833{ 3834 int ton = 0; 3835 int i; 3836 3837 for (i = 0; i < ISDN_MAX_CHANNELS; i++) { 3838 modem_info *info = &dev->mdm.info[i]; 3839 if (info->msr & UART_MSR_RI) { 3840 ton = 1; 3841 isdn_tty_modem_result(RESULT_RING, info); 3842 } 3843 } 3844 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton); 3845} 3846 3847/* 3848 * For all online tty's, try sending data to 3849 * the lower levels. 3850 */ 3851void 3852isdn_tty_modem_xmit(void) 3853{ 3854 int ton = 1; 3855 int i; 3856 3857 for (i = 0; i < ISDN_MAX_CHANNELS; i++) { 3858 modem_info *info = &dev->mdm.info[i]; 3859 if (info->online) { 3860 ton = 1; 3861 isdn_tty_senddown(info); 3862 isdn_tty_tint(info); 3863 } 3864 } 3865 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton); 3866} 3867 3868/* 3869 * Check all channels if we have a 'no carrier' timeout. 3870 * Timeout value is set by Register S7. 3871 */ 3872void 3873isdn_tty_carrier_timeout(void) 3874{ 3875 int ton = 0; 3876 int i; 3877 3878 for (i = 0; i < ISDN_MAX_CHANNELS; i++) { 3879 modem_info *info = &dev->mdm.info[i]; 3880 if (info->dialing) { 3881 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) { 3882 info->dialing = 0; 3883 isdn_tty_modem_result(RESULT_NO_CARRIER, info); 3884 isdn_tty_modem_hup(info, 1); 3885 } 3886 else 3887 ton = 1; 3888 } 3889 } 3890 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton); 3891} 3892