1/* $Id: isdn_tty.c,v 1.1.2.3 2004/02/10 01:07:13 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/smp_lock.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 int isdn_tty_edit_at(const char *, int, modem_info *); 32static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *); 33static void isdn_tty_modem_reset_regs(modem_info *, int); 34static void isdn_tty_cmd_ATA(modem_info *); 35static void isdn_tty_flush_buffer(struct tty_struct *); 36static void isdn_tty_modem_result(int, modem_info *); 37#ifdef CONFIG_ISDN_AUDIO 38static int isdn_tty_countDLE(unsigned char *, int); 39#endif 40 41/* Leave this unchanged unless you know what you do! */ 42#define MODEM_PARANOIA_CHECK 43#define MODEM_DO_RESTART 44 45static int bit2si[8] = 46{1, 5, 7, 7, 7, 7, 7, 7}; 47static int si2bit[8] = 48{4, 1, 4, 4, 4, 4, 4, 4}; 49 50char *isdn_tty_revision = "$Revision: 1.1.2.3 $"; 51 52 53/* isdn_tty_try_read() is called from within isdn_tty_rcv_skb() 54 * to stuff incoming data directly into a tty's flip-buffer. This 55 * is done to speed up tty-receiving if the receive-queue is empty. 56 * This routine MUST be called with interrupts off. 57 * Return: 58 * 1 = Success 59 * 0 = Failure, data has to be buffered and later processed by 60 * isdn_tty_readmodem(). 61 */ 62static int 63isdn_tty_try_read(modem_info * info, struct sk_buff *skb) 64{ 65 int c; 66 int len; 67 struct tty_struct *tty; 68 char last; 69 70 if (info->online) { 71 if ((tty = info->tty)) { 72 if (info->mcr & UART_MCR_RTS) { 73 len = skb->len 74#ifdef CONFIG_ISDN_AUDIO 75 + ISDN_AUDIO_SKB_DLECOUNT(skb) 76#endif 77 ; 78 79 c = tty_buffer_request_room(tty, len); 80 if (c >= len) { 81#ifdef CONFIG_ISDN_AUDIO 82 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) { 83 int l = skb->len; 84 unsigned char *dp = skb->data; 85 while (--l) { 86 if (*dp == DLE) 87 tty_insert_flip_char(tty, DLE, 0); 88 tty_insert_flip_char(tty, *dp++, 0); 89 } 90 if (*dp == DLE) 91 tty_insert_flip_char(tty, DLE, 0); 92 last = *dp; 93 } else { 94#endif 95 if(len > 1) 96 tty_insert_flip_string(tty, skb->data, len - 1); 97 last = skb->data[len - 1]; 98#ifdef CONFIG_ISDN_AUDIO 99 } 100#endif 101 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP) 102 tty_insert_flip_char(tty, last, 0xFF); 103 else 104 tty_insert_flip_char(tty, last, TTY_NORMAL); 105 tty_flip_buffer_push(tty); 106 kfree_skb(skb); 107 return 1; 108 } 109 } 110 } 111 } 112 return 0; 113} 114 115/* isdn_tty_readmodem() is called periodically from within timer-interrupt. 116 * It tries getting received data from the receive queue an stuff it into 117 * the tty's flip-buffer. 118 */ 119void 120isdn_tty_readmodem(void) 121{ 122 int resched = 0; 123 int midx; 124 int i; 125 int r; 126 struct tty_struct *tty; 127 modem_info *info; 128 129 for (i = 0; i < ISDN_MAX_CHANNELS; i++) { 130 if ((midx = dev->m_idx[i]) >= 0) { 131 info = &dev->mdm.info[midx]; 132 if (info->online) { 133 r = 0; 134#ifdef CONFIG_ISDN_AUDIO 135 isdn_audio_eval_dtmf(info); 136 if ((info->vonline & 1) && (info->emu.vpar[1])) 137 isdn_audio_eval_silence(info); 138#endif 139 if ((tty = info->tty)) { 140 if (info->mcr & UART_MCR_RTS) { 141 /* CISCO AsyncPPP Hack */ 142 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP)) 143 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0); 144 else 145 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1); 146 if (r) 147 tty_flip_buffer_push(tty); 148 } else 149 r = 1; 150 } else 151 r = 1; 152 if (r) { 153 info->rcvsched = 0; 154 resched = 1; 155 } else 156 info->rcvsched = 1; 157 } 158 } 159 } 160 if (!resched) 161 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0); 162} 163 164int 165isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb) 166{ 167 ulong flags; 168 int midx; 169#ifdef CONFIG_ISDN_AUDIO 170 int ifmt; 171#endif 172 modem_info *info; 173 174 if ((midx = dev->m_idx[i]) < 0) { 175 /* if midx is invalid, packet is not for tty */ 176 return 0; 177 } 178 info = &dev->mdm.info[midx]; 179#ifdef CONFIG_ISDN_AUDIO 180 ifmt = 1; 181 182 if ((info->vonline) && (!info->emu.vpar[4])) 183 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt); 184 if ((info->vonline & 1) && (info->emu.vpar[1])) 185 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt); 186#endif 187 if ((info->online < 2) 188#ifdef CONFIG_ISDN_AUDIO 189 && (!(info->vonline & 1)) 190#endif 191 ) { 192 /* If Modem not listening, drop data */ 193 kfree_skb(skb); 194 return 1; 195 } 196 if (info->emu.mdmreg[REG_T70] & BIT_T70) { 197 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) { 198 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */ 199 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */ 200 skb_pull(skb, 4); 201 else 202 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */ 203 skb_pull(skb, 2); 204 } else 205 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */ 206 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1))) 207 skb_pull(skb, 4); 208 } 209#ifdef CONFIG_ISDN_AUDIO 210 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0; 211 ISDN_AUDIO_SKB_LOCK(skb) = 0; 212 if (info->vonline & 1) { 213 /* voice conversion/compression */ 214 switch (info->emu.vpar[3]) { 215 case 2: 216 case 3: 217 case 4: 218 /* adpcm 219 * Since compressed data takes less 220 * space, we can overwrite the buffer. 221 */ 222 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr, 223 ifmt, 224 skb->data, 225 skb->data, 226 skb->len)); 227 break; 228 case 5: 229 /* a-law */ 230 if (!ifmt) 231 isdn_audio_ulaw2alaw(skb->data, skb->len); 232 break; 233 case 6: 234 /* u-law */ 235 if (ifmt) 236 isdn_audio_alaw2ulaw(skb->data, skb->len); 237 break; 238 } 239 ISDN_AUDIO_SKB_DLECOUNT(skb) = 240 isdn_tty_countDLE(skb->data, skb->len); 241 } 242#ifdef CONFIG_ISDN_TTY_FAX 243 else { 244 if (info->faxonline & 2) { 245 isdn_tty_fax_bitorder(info, skb); 246 ISDN_AUDIO_SKB_DLECOUNT(skb) = 247 isdn_tty_countDLE(skb->data, skb->len); 248 } 249 } 250#endif 251#endif 252 /* Try to deliver directly via tty-buf if queue is empty */ 253 spin_lock_irqsave(&info->readlock, flags); 254 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) 255 if (isdn_tty_try_read(info, skb)) { 256 spin_unlock_irqrestore(&info->readlock, flags); 257 return 1; 258 } 259 /* Direct deliver failed or queue wasn't empty. 260 * Queue up for later dequeueing via timer-irq. 261 */ 262 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb); 263 dev->drv[di]->rcvcount[channel] += 264 (skb->len 265#ifdef CONFIG_ISDN_AUDIO 266 + ISDN_AUDIO_SKB_DLECOUNT(skb) 267#endif 268 ); 269 spin_unlock_irqrestore(&info->readlock, flags); 270 /* Schedule dequeuing */ 271 if ((dev->modempoll) && (info->rcvsched)) 272 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1); 273 return 1; 274} 275 276static void 277isdn_tty_cleanup_xmit(modem_info * info) 278{ 279 skb_queue_purge(&info->xmit_queue); 280#ifdef CONFIG_ISDN_AUDIO 281 skb_queue_purge(&info->dtmf_queue); 282#endif 283} 284 285static void 286isdn_tty_tint(modem_info * info) 287{ 288 struct sk_buff *skb = skb_dequeue(&info->xmit_queue); 289 int len, slen; 290 291 if (!skb) 292 return; 293 len = skb->len; 294 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver, 295 info->isdn_channel, 1, skb)) == len) { 296 struct tty_struct *tty = info->tty; 297 info->send_outstanding++; 298 info->msr &= ~UART_MSR_CTS; 299 info->lsr &= ~UART_LSR_TEMT; 300 tty_wakeup(tty); 301 return; 302 } 303 if (slen < 0) { 304 /* Error: no channel, already shutdown, or wrong parameter */ 305 dev_kfree_skb(skb); 306 return; 307 } 308 skb_queue_head(&info->xmit_queue, skb); 309} 310 311#ifdef CONFIG_ISDN_AUDIO 312static int 313isdn_tty_countDLE(unsigned char *buf, int len) 314{ 315 int count = 0; 316 317 while (len--) 318 if (*buf++ == DLE) 319 count++; 320 return count; 321} 322 323/* This routine is called from within isdn_tty_write() to perform 324 * DLE-decoding when sending audio-data. 325 */ 326static int 327isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len) 328{ 329 unsigned char *p = &info->xmit_buf[info->xmit_count]; 330 int count = 0; 331 332 while (len > 0) { 333 if (m->lastDLE) { 334 m->lastDLE = 0; 335 switch (*p) { 336 case DLE: 337 /* Escape code */ 338 if (len > 1) 339 memmove(p, p + 1, len - 1); 340 p--; 341 count++; 342 break; 343 case ETX: 344 /* End of data */ 345 info->vonline |= 4; 346 return count; 347 case DC4: 348 /* Abort RX */ 349 info->vonline &= ~1; 350#ifdef ISDN_DEBUG_MODEM_VOICE 351 printk(KERN_DEBUG 352 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n", 353 info->line); 354#endif 355 isdn_tty_at_cout("\020\003", info); 356 if (!info->vonline) { 357#ifdef ISDN_DEBUG_MODEM_VOICE 358 printk(KERN_DEBUG 359 "DLEdown: send VCON on ttyI%d\n", 360 info->line); 361#endif 362 isdn_tty_at_cout("\r\nVCON\r\n", info); 363 } 364 /* Fall through */ 365 case 'q': 366 case 's': 367 /* Silence */ 368 if (len > 1) 369 memmove(p, p + 1, len - 1); 370 p--; 371 break; 372 } 373 } else { 374 if (*p == DLE) 375 m->lastDLE = 1; 376 else 377 count++; 378 } 379 p++; 380 len--; 381 } 382 if (len < 0) { 383 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n"); 384 return 0; 385 } 386 return count; 387} 388 389/* This routine is called from within isdn_tty_write() when receiving 390 * audio-data. It interrupts receiving, if an character other than 391 * ^S or ^Q is sent. 392 */ 393static int 394isdn_tty_end_vrx(const char *buf, int c) 395{ 396 char ch; 397 398 while (c--) { 399 ch = *buf; 400 if ((ch != 0x11) && (ch != 0x13)) 401 return 1; 402 buf++; 403 } 404 return 0; 405} 406 407static int voice_cf[7] = 408{0, 0, 4, 3, 2, 0, 0}; 409 410#endif /* CONFIG_ISDN_AUDIO */ 411 412/* isdn_tty_senddown() is called either directly from within isdn_tty_write() 413 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls 414 * outgoing data from the tty's xmit-buffer, handles voice-decompression or 415 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint. 416 */ 417static void 418isdn_tty_senddown(modem_info * info) 419{ 420 int buflen; 421 int skb_res; 422#ifdef CONFIG_ISDN_AUDIO 423 int audio_len; 424#endif 425 struct sk_buff *skb; 426 427#ifdef CONFIG_ISDN_AUDIO 428 if (info->vonline & 4) { 429 info->vonline &= ~6; 430 if (!info->vonline) { 431#ifdef ISDN_DEBUG_MODEM_VOICE 432 printk(KERN_DEBUG 433 "senddown: send VCON on ttyI%d\n", 434 info->line); 435#endif 436 isdn_tty_at_cout("\r\nVCON\r\n", info); 437 } 438 } 439#endif 440 if (!(buflen = info->xmit_count)) 441 return; 442 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0) 443 info->msr &= ~UART_MSR_CTS; 444 info->lsr &= ~UART_LSR_TEMT; 445 /* info->xmit_count is modified here and in isdn_tty_write(). 446 * So we return here if isdn_tty_write() is in the 447 * critical section. 448 */ 449 atomic_inc(&info->xmit_lock); 450 if (!(atomic_dec_and_test(&info->xmit_lock))) 451 return; 452 if (info->isdn_driver < 0) { 453 info->xmit_count = 0; 454 return; 455 } 456 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4; 457#ifdef CONFIG_ISDN_AUDIO 458 if (info->vonline & 2) 459 audio_len = buflen * voice_cf[info->emu.vpar[3]]; 460 else 461 audio_len = 0; 462 skb = dev_alloc_skb(skb_res + buflen + audio_len); 463#else 464 skb = dev_alloc_skb(skb_res + buflen); 465#endif 466 if (!skb) { 467 printk(KERN_WARNING 468 "isdn_tty: Out of memory in ttyI%d senddown\n", 469 info->line); 470 return; 471 } 472 skb_reserve(skb, skb_res); 473 memcpy(skb_put(skb, buflen), info->xmit_buf, buflen); 474 info->xmit_count = 0; 475#ifdef CONFIG_ISDN_AUDIO 476 if (info->vonline & 2) { 477 /* For now, ifmt is fixed to 1 (alaw), since this 478 * is used with ISDN everywhere in the world, except 479 * US, Canada and Japan. 480 * Later, when US-ISDN protocols are implemented, 481 * this setting will depend on the D-channel protocol. 482 */ 483 int ifmt = 1; 484 485 /* voice conversion/decompression */ 486 switch (info->emu.vpar[3]) { 487 case 2: 488 case 3: 489 case 4: 490 /* adpcm, compatible to ZyXel 1496 modem 491 * with ROM revision 6.01 492 */ 493 audio_len = isdn_audio_adpcm2xlaw(info->adpcms, 494 ifmt, 495 skb->data, 496 skb_put(skb, audio_len), 497 buflen); 498 skb_pull(skb, buflen); 499 skb_trim(skb, audio_len); 500 break; 501 case 5: 502 /* a-law */ 503 if (!ifmt) 504 isdn_audio_alaw2ulaw(skb->data, 505 buflen); 506 break; 507 case 6: 508 /* u-law */ 509 if (ifmt) 510 isdn_audio_ulaw2alaw(skb->data, 511 buflen); 512 break; 513 } 514 } 515#endif /* CONFIG_ISDN_AUDIO */ 516 if (info->emu.mdmreg[REG_T70] & BIT_T70) { 517 /* Add T.70 simplified header */ 518 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) 519 memcpy(skb_push(skb, 2), "\1\0", 2); 520 else 521 memcpy(skb_push(skb, 4), "\1\0\1\0", 4); 522 } 523 skb_queue_tail(&info->xmit_queue, skb); 524} 525 526/************************************************************ 527 * 528 * Modem-functions 529 * 530 * mostly "stolen" from original Linux-serial.c and friends. 531 * 532 ************************************************************/ 533 534/* The next routine is called once from within timer-interrupt 535 * triggered within isdn_tty_modem_ncarrier(). It calls 536 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message 537 * into the tty's buffer. 538 */ 539static void 540isdn_tty_modem_do_ncarrier(unsigned long data) 541{ 542 modem_info *info = (modem_info *) data; 543 isdn_tty_modem_result(RESULT_NO_CARRIER, info); 544} 545 546/* Next routine is called, whenever the DTR-signal is raised. 547 * It checks the ncarrier-flag, and triggers the above routine 548 * when necessary. The ncarrier-flag is set, whenever DTR goes 549 * low. 550 */ 551static void 552isdn_tty_modem_ncarrier(modem_info * info) 553{ 554 if (info->ncarrier) { 555 info->nc_timer.expires = jiffies + HZ; 556 add_timer(&info->nc_timer); 557 } 558} 559 560/* 561 * return the usage calculated by si and layer 2 protocol 562 */ 563static int 564isdn_calc_usage(int si, int l2) 565{ 566 int usg = ISDN_USAGE_MODEM; 567 568#ifdef CONFIG_ISDN_AUDIO 569 if (si == 1) { 570 switch(l2) { 571 case ISDN_PROTO_L2_MODEM: 572 usg = ISDN_USAGE_MODEM; 573 break; 574#ifdef CONFIG_ISDN_TTY_FAX 575 case ISDN_PROTO_L2_FAX: 576 usg = ISDN_USAGE_FAX; 577 break; 578#endif 579 case ISDN_PROTO_L2_TRANS: 580 default: 581 usg = ISDN_USAGE_VOICE; 582 break; 583 } 584 } 585#endif 586 return(usg); 587} 588 589/* isdn_tty_dial() performs dialing of a tty an the necessary 590 * setup of the lower levels before that. 591 */ 592static void 593isdn_tty_dial(char *n, modem_info * info, atemu * m) 594{ 595 int usg = ISDN_USAGE_MODEM; 596 int si = 7; 597 int l2 = m->mdmreg[REG_L2PROT]; 598 u_long flags; 599 isdn_ctrl cmd; 600 int i; 601 int j; 602 603 for (j = 7; j >= 0; j--) 604 if (m->mdmreg[REG_SI1] & (1 << j)) { 605 si = bit2si[j]; 606 break; 607 } 608 usg = isdn_calc_usage(si, l2); 609#ifdef CONFIG_ISDN_AUDIO 610 if ((si == 1) && 611 (l2 != ISDN_PROTO_L2_MODEM) 612#ifdef CONFIG_ISDN_TTY_FAX 613 && (l2 != ISDN_PROTO_L2_FAX) 614#endif 615 ) { 616 l2 = ISDN_PROTO_L2_TRANS; 617 usg = ISDN_USAGE_VOICE; 618 } 619#endif 620 m->mdmreg[REG_SI1I] = si2bit[si]; 621 spin_lock_irqsave(&dev->lock, flags); 622 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn); 623 if (i < 0) { 624 spin_unlock_irqrestore(&dev->lock, flags); 625 isdn_tty_modem_result(RESULT_NO_DIALTONE, info); 626 } else { 627 info->isdn_driver = dev->drvmap[i]; 628 info->isdn_channel = dev->chanmap[i]; 629 info->drv_index = i; 630 dev->m_idx[i] = info->line; 631 dev->usage[i] |= ISDN_USAGE_OUTGOING; 632 info->last_dir = 1; 633 strcpy(info->last_num, n); 634 isdn_info_update(); 635 spin_unlock_irqrestore(&dev->lock, flags); 636 cmd.driver = info->isdn_driver; 637 cmd.arg = info->isdn_channel; 638 cmd.command = ISDN_CMD_CLREAZ; 639 isdn_command(&cmd); 640 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver)); 641 cmd.driver = info->isdn_driver; 642 cmd.command = ISDN_CMD_SETEAZ; 643 isdn_command(&cmd); 644 cmd.driver = info->isdn_driver; 645 cmd.command = ISDN_CMD_SETL2; 646 info->last_l2 = l2; 647 cmd.arg = info->isdn_channel + (l2 << 8); 648 isdn_command(&cmd); 649 cmd.driver = info->isdn_driver; 650 cmd.command = ISDN_CMD_SETL3; 651 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8); 652#ifdef CONFIG_ISDN_TTY_FAX 653 if (l2 == ISDN_PROTO_L2_FAX) { 654 cmd.parm.fax = info->fax; 655 info->fax->direction = ISDN_TTY_FAX_CONN_OUT; 656 } 657#endif 658 isdn_command(&cmd); 659 cmd.driver = info->isdn_driver; 660 cmd.arg = info->isdn_channel; 661 sprintf(cmd.parm.setup.phone, "%s", n); 662 sprintf(cmd.parm.setup.eazmsn, "%s", 663 isdn_map_eaz2msn(m->msn, info->isdn_driver)); 664 cmd.parm.setup.si1 = si; 665 cmd.parm.setup.si2 = m->mdmreg[REG_SI2]; 666 cmd.command = ISDN_CMD_DIAL; 667 info->dialing = 1; 668 info->emu.carrierwait = 0; 669 strcpy(dev->num[i], n); 670 isdn_info_update(); 671 isdn_command(&cmd); 672 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1); 673 } 674} 675 676/* isdn_tty_hangup() disassociates a tty from the real 677 * ISDN-line (hangup). The usage-status is cleared 678 * and some cleanup is done also. 679 */ 680void 681isdn_tty_modem_hup(modem_info * info, int local) 682{ 683 isdn_ctrl cmd; 684 int di, ch; 685 686 if (!info) 687 return; 688 689 di = info->isdn_driver; 690 ch = info->isdn_channel; 691 if (di < 0 || ch < 0) 692 return; 693 694 info->isdn_driver = -1; 695 info->isdn_channel = -1; 696 697#ifdef ISDN_DEBUG_MODEM_HUP 698 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line); 699#endif 700 info->rcvsched = 0; 701 isdn_tty_flush_buffer(info->tty); 702 if (info->online) { 703 info->last_lhup = local; 704 info->online = 0; 705 isdn_tty_modem_result(RESULT_NO_CARRIER, info); 706 } 707#ifdef CONFIG_ISDN_AUDIO 708 info->vonline = 0; 709#ifdef CONFIG_ISDN_TTY_FAX 710 info->faxonline = 0; 711 info->fax->phase = ISDN_FAX_PHASE_IDLE; 712#endif 713 info->emu.vpar[4] = 0; 714 info->emu.vpar[5] = 8; 715 kfree(info->dtmf_state); 716 info->dtmf_state = NULL; 717 kfree(info->silence_state); 718 info->silence_state = NULL; 719 kfree(info->adpcms); 720 info->adpcms = NULL; 721 kfree(info->adpcmr); 722 info->adpcmr = NULL; 723#endif 724 if ((info->msr & UART_MSR_RI) && 725 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG)) 726 isdn_tty_modem_result(RESULT_RUNG, info); 727 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI); 728 info->lsr |= UART_LSR_TEMT; 729 730 if (local) { 731 cmd.driver = di; 732 cmd.command = ISDN_CMD_HANGUP; 733 cmd.arg = ch; 734 isdn_command(&cmd); 735 } 736 737 isdn_all_eaz(di, ch); 738 info->emu.mdmreg[REG_RINGCNT] = 0; 739 isdn_free_channel(di, ch, 0); 740 741 if (info->drv_index >= 0) { 742 dev->m_idx[info->drv_index] = -1; 743 info->drv_index = -1; 744 } 745} 746 747/* 748 * Begin of a CAPI like interface, currently used only for 749 * supplementary service (CAPI 2.0 part III) 750 */ 751#include <linux/isdn/capicmd.h> 752 753int 754isdn_tty_capi_facility(capi_msg *cm) { 755 return(-1); /* dummy */ 756} 757 758/* isdn_tty_suspend() tries to suspend the current tty connection 759 */ 760static void 761isdn_tty_suspend(char *id, modem_info * info, atemu * m) 762{ 763 isdn_ctrl cmd; 764 765 int l; 766 767 if (!info) 768 return; 769 770#ifdef ISDN_DEBUG_MODEM_SERVICES 771 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line); 772#endif 773 l = strlen(id); 774 if ((info->isdn_driver >= 0)) { 775 cmd.parm.cmsg.Length = l+18; 776 cmd.parm.cmsg.Command = CAPI_FACILITY; 777 cmd.parm.cmsg.Subcommand = CAPI_REQ; 778 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1; 779 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */ 780 cmd.parm.cmsg.para[1] = 0; 781 cmd.parm.cmsg.para[2] = l + 3; 782 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */ 783 cmd.parm.cmsg.para[4] = 0; 784 cmd.parm.cmsg.para[5] = l; 785 strncpy(&cmd.parm.cmsg.para[6], id, l); 786 cmd.command = CAPI_PUT_MESSAGE; 787 cmd.driver = info->isdn_driver; 788 cmd.arg = info->isdn_channel; 789 isdn_command(&cmd); 790 } 791} 792 793/* isdn_tty_resume() tries to resume a suspended call 794 * setup of the lower levels before that. unfortunatly here is no 795 * checking for compatibility of used protocols implemented by Q931 796 * It does the same things like isdn_tty_dial, the last command 797 * is different, may be we can merge it. 798 */ 799 800static void 801isdn_tty_resume(char *id, modem_info * info, atemu * m) 802{ 803 int usg = ISDN_USAGE_MODEM; 804 int si = 7; 805 int l2 = m->mdmreg[REG_L2PROT]; 806 isdn_ctrl cmd; 807 ulong flags; 808 int i; 809 int j; 810 int l; 811 812 l = strlen(id); 813 for (j = 7; j >= 0; j--) 814 if (m->mdmreg[REG_SI1] & (1 << j)) { 815 si = bit2si[j]; 816 break; 817 } 818 usg = isdn_calc_usage(si, l2); 819#ifdef CONFIG_ISDN_AUDIO 820 if ((si == 1) && 821 (l2 != ISDN_PROTO_L2_MODEM) 822#ifdef CONFIG_ISDN_TTY_FAX 823 && (l2 != ISDN_PROTO_L2_FAX) 824#endif 825 ) { 826 l2 = ISDN_PROTO_L2_TRANS; 827 usg = ISDN_USAGE_VOICE; 828 } 829#endif 830 m->mdmreg[REG_SI1I] = si2bit[si]; 831 spin_lock_irqsave(&dev->lock, flags); 832 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn); 833 if (i < 0) { 834 spin_unlock_irqrestore(&dev->lock, flags); 835 isdn_tty_modem_result(RESULT_NO_DIALTONE, info); 836 } else { 837 info->isdn_driver = dev->drvmap[i]; 838 info->isdn_channel = dev->chanmap[i]; 839 info->drv_index = i; 840 dev->m_idx[i] = info->line; 841 dev->usage[i] |= ISDN_USAGE_OUTGOING; 842 info->last_dir = 1; 843// strcpy(info->last_num, n); 844 isdn_info_update(); 845 spin_unlock_irqrestore(&dev->lock, flags); 846 cmd.driver = info->isdn_driver; 847 cmd.arg = info->isdn_channel; 848 cmd.command = ISDN_CMD_CLREAZ; 849 isdn_command(&cmd); 850 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver)); 851 cmd.driver = info->isdn_driver; 852 cmd.command = ISDN_CMD_SETEAZ; 853 isdn_command(&cmd); 854 cmd.driver = info->isdn_driver; 855 cmd.command = ISDN_CMD_SETL2; 856 info->last_l2 = l2; 857 cmd.arg = info->isdn_channel + (l2 << 8); 858 isdn_command(&cmd); 859 cmd.driver = info->isdn_driver; 860 cmd.command = ISDN_CMD_SETL3; 861 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8); 862 isdn_command(&cmd); 863 cmd.driver = info->isdn_driver; 864 cmd.arg = info->isdn_channel; 865 cmd.parm.cmsg.Length = l+18; 866 cmd.parm.cmsg.Command = CAPI_FACILITY; 867 cmd.parm.cmsg.Subcommand = CAPI_REQ; 868 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1; 869 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */ 870 cmd.parm.cmsg.para[1] = 0; 871 cmd.parm.cmsg.para[2] = l+3; 872 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */ 873 cmd.parm.cmsg.para[4] = 0; 874 cmd.parm.cmsg.para[5] = l; 875 strncpy(&cmd.parm.cmsg.para[6], id, l); 876 cmd.command =CAPI_PUT_MESSAGE; 877 info->dialing = 1; 878// strcpy(dev->num[i], n); 879 isdn_info_update(); 880 isdn_command(&cmd); 881 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1); 882 } 883} 884 885/* isdn_tty_send_msg() sends a message to a HL driver 886 * This is used for hybrid modem cards to send AT commands to it 887 */ 888 889static void 890isdn_tty_send_msg(modem_info * info, atemu * m, char *msg) 891{ 892 int usg = ISDN_USAGE_MODEM; 893 int si = 7; 894 int l2 = m->mdmreg[REG_L2PROT]; 895 isdn_ctrl cmd; 896 ulong flags; 897 int i; 898 int j; 899 int l; 900 901 l = strlen(msg); 902 if (!l) { 903 isdn_tty_modem_result(RESULT_ERROR, info); 904 return; 905 } 906 for (j = 7; j >= 0; j--) 907 if (m->mdmreg[REG_SI1] & (1 << j)) { 908 si = bit2si[j]; 909 break; 910 } 911 usg = isdn_calc_usage(si, l2); 912#ifdef CONFIG_ISDN_AUDIO 913 if ((si == 1) && 914 (l2 != ISDN_PROTO_L2_MODEM) 915#ifdef CONFIG_ISDN_TTY_FAX 916 && (l2 != ISDN_PROTO_L2_FAX) 917#endif 918 ) { 919 l2 = ISDN_PROTO_L2_TRANS; 920 usg = ISDN_USAGE_VOICE; 921 } 922#endif 923 m->mdmreg[REG_SI1I] = si2bit[si]; 924 spin_lock_irqsave(&dev->lock, flags); 925 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn); 926 if (i < 0) { 927 spin_unlock_irqrestore(&dev->lock, flags); 928 isdn_tty_modem_result(RESULT_NO_DIALTONE, info); 929 } else { 930 info->isdn_driver = dev->drvmap[i]; 931 info->isdn_channel = dev->chanmap[i]; 932 info->drv_index = i; 933 dev->m_idx[i] = info->line; 934 dev->usage[i] |= ISDN_USAGE_OUTGOING; 935 info->last_dir = 1; 936 isdn_info_update(); 937 spin_unlock_irqrestore(&dev->lock, flags); 938 cmd.driver = info->isdn_driver; 939 cmd.arg = info->isdn_channel; 940 cmd.command = ISDN_CMD_CLREAZ; 941 isdn_command(&cmd); 942 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver)); 943 cmd.driver = info->isdn_driver; 944 cmd.command = ISDN_CMD_SETEAZ; 945 isdn_command(&cmd); 946 cmd.driver = info->isdn_driver; 947 cmd.command = ISDN_CMD_SETL2; 948 info->last_l2 = l2; 949 cmd.arg = info->isdn_channel + (l2 << 8); 950 isdn_command(&cmd); 951 cmd.driver = info->isdn_driver; 952 cmd.command = ISDN_CMD_SETL3; 953 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8); 954 isdn_command(&cmd); 955 cmd.driver = info->isdn_driver; 956 cmd.arg = info->isdn_channel; 957 cmd.parm.cmsg.Length = l+14; 958 cmd.parm.cmsg.Command = CAPI_MANUFACTURER; 959 cmd.parm.cmsg.Subcommand = CAPI_REQ; 960 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1; 961 cmd.parm.cmsg.para[0] = l+1; 962 strncpy(&cmd.parm.cmsg.para[1], msg, l); 963 cmd.parm.cmsg.para[l+1] = 0xd; 964 cmd.command =CAPI_PUT_MESSAGE; 965/* info->dialing = 1; 966 strcpy(dev->num[i], n); 967 isdn_info_update(); 968*/ 969 isdn_command(&cmd); 970 } 971} 972 973static inline int 974isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine) 975{ 976#ifdef MODEM_PARANOIA_CHECK 977 if (!info) { 978 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n", 979 name, routine); 980 return 1; 981 } 982 if (info->magic != ISDN_ASYNC_MAGIC) { 983 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n", 984 name, routine); 985 return 1; 986 } 987#endif 988 return 0; 989} 990 991/* 992 * This routine is called to set the UART divisor registers to match 993 * the specified baud rate for a serial port. 994 */ 995static void 996isdn_tty_change_speed(modem_info * info) 997{ 998 uint cflag, 999 cval, 1000 fcr, 1001 quot; 1002 int i; 1003 1004 if (!info->tty || !info->tty->termios) 1005 return; 1006 cflag = info->tty->termios->c_cflag; 1007 1008 quot = i = cflag & CBAUD; 1009 if (i & CBAUDEX) { 1010 i &= ~CBAUDEX; 1011 if (i < 1 || i > 2) 1012 info->tty->termios->c_cflag &= ~CBAUDEX; 1013 else 1014 i += 15; 1015 } 1016 if (quot) { 1017 info->mcr |= UART_MCR_DTR; 1018 isdn_tty_modem_ncarrier(info); 1019 } else { 1020 info->mcr &= ~UART_MCR_DTR; 1021 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) { 1022#ifdef ISDN_DEBUG_MODEM_HUP 1023 printk(KERN_DEBUG "Mhup in changespeed\n"); 1024#endif 1025 if (info->online) 1026 info->ncarrier = 1; 1027 isdn_tty_modem_reset_regs(info, 0); 1028 isdn_tty_modem_hup(info, 1); 1029 } 1030 return; 1031 } 1032 /* byte size and parity */ 1033 cval = cflag & (CSIZE | CSTOPB); 1034 cval >>= 4; 1035 if (cflag & PARENB) 1036 cval |= UART_LCR_PARITY; 1037 if (!(cflag & PARODD)) 1038 cval |= UART_LCR_EPAR; 1039 fcr = 0; 1040 1041 /* CTS flow control flag and modem status interrupts */ 1042 if (cflag & CRTSCTS) { 1043 info->flags |= ISDN_ASYNC_CTS_FLOW; 1044 } else 1045 info->flags &= ~ISDN_ASYNC_CTS_FLOW; 1046 if (cflag & CLOCAL) 1047 info->flags &= ~ISDN_ASYNC_CHECK_CD; 1048 else { 1049 info->flags |= ISDN_ASYNC_CHECK_CD; 1050 } 1051} 1052 1053static int 1054isdn_tty_startup(modem_info * info) 1055{ 1056 if (info->flags & ISDN_ASYNC_INITIALIZED) 1057 return 0; 1058 isdn_lock_drivers(); 1059#ifdef ISDN_DEBUG_MODEM_OPEN 1060 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line); 1061#endif 1062 /* 1063 * Now, initialize the UART 1064 */ 1065 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2; 1066 if (info->tty) 1067 clear_bit(TTY_IO_ERROR, &info->tty->flags); 1068 /* 1069 * and set the speed of the serial port 1070 */ 1071 isdn_tty_change_speed(info); 1072 1073 info->flags |= ISDN_ASYNC_INITIALIZED; 1074 info->msr |= (UART_MSR_DSR | UART_MSR_CTS); 1075 info->send_outstanding = 0; 1076 return 0; 1077} 1078 1079/* 1080 * This routine will shutdown a serial port; interrupts are disabled, and 1081 * DTR is dropped if the hangup on close termio flag is on. 1082 */ 1083static void 1084isdn_tty_shutdown(modem_info * info) 1085{ 1086 if (!(info->flags & ISDN_ASYNC_INITIALIZED)) 1087 return; 1088#ifdef ISDN_DEBUG_MODEM_OPEN 1089 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line); 1090#endif 1091 isdn_unlock_drivers(); 1092 info->msr &= ~UART_MSR_RI; 1093 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) { 1094 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS); 1095 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) { 1096 isdn_tty_modem_reset_regs(info, 0); 1097#ifdef ISDN_DEBUG_MODEM_HUP 1098 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n"); 1099#endif 1100 isdn_tty_modem_hup(info, 1); 1101 } 1102 } 1103 if (info->tty) 1104 set_bit(TTY_IO_ERROR, &info->tty->flags); 1105 1106 info->flags &= ~ISDN_ASYNC_INITIALIZED; 1107} 1108 1109/* isdn_tty_write() is the main send-routine. It is called from the upper 1110 * levels within the kernel to perform sending data. Depending on the 1111 * online-flag it either directs output to the at-command-interpreter or 1112 * to the lower level. Additional tasks done here: 1113 * - If online, check for escape-sequence (+++) 1114 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes. 1115 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed. 1116 * - If dialing, abort dial. 1117 */ 1118static int 1119isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count) 1120{ 1121 int c; 1122 int total = 0; 1123 modem_info *info = (modem_info *) tty->driver_data; 1124 atemu *m = &info->emu; 1125 1126 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write")) 1127 return 0; 1128 /* See isdn_tty_senddown() */ 1129 atomic_inc(&info->xmit_lock); 1130 while (1) { 1131 c = count; 1132 if (c > info->xmit_size - info->xmit_count) 1133 c = info->xmit_size - info->xmit_count; 1134 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize) 1135 c = dev->drv[info->isdn_driver]->maxbufsize; 1136 if (c <= 0) 1137 break; 1138 if ((info->online > 1) 1139#ifdef CONFIG_ISDN_AUDIO 1140 || (info->vonline & 3) 1141#endif 1142 ) { 1143#ifdef CONFIG_ISDN_AUDIO 1144 if (!info->vonline) 1145#endif 1146 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c, 1147 &(m->pluscount), 1148 &(m->lastplus)); 1149 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c); 1150#ifdef CONFIG_ISDN_AUDIO 1151 if (info->vonline) { 1152 int cc = isdn_tty_handleDLEdown(info, m, c); 1153 if (info->vonline & 2) { 1154 if (!cc) { 1155 /* If DLE decoding results in zero-transmit, but 1156 * c originally was non-zero, do a wakeup. 1157 */ 1158 tty_wakeup(tty); 1159 info->msr |= UART_MSR_CTS; 1160 info->lsr |= UART_LSR_TEMT; 1161 } 1162 info->xmit_count += cc; 1163 } 1164 if ((info->vonline & 3) == 1) { 1165 /* Do NOT handle Ctrl-Q or Ctrl-S 1166 * when in full-duplex audio mode. 1167 */ 1168 if (isdn_tty_end_vrx(buf, c)) { 1169 info->vonline &= ~1; 1170#ifdef ISDN_DEBUG_MODEM_VOICE 1171 printk(KERN_DEBUG 1172 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n", 1173 info->line); 1174#endif 1175 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info); 1176 } 1177 } 1178 } else 1179 if (TTY_IS_FCLASS1(info)) { 1180 int cc = isdn_tty_handleDLEdown(info, m, c); 1181 1182 if (info->vonline & 4) { /* ETX seen */ 1183 isdn_ctrl c; 1184 1185 c.command = ISDN_CMD_FAXCMD; 1186 c.driver = info->isdn_driver; 1187 c.arg = info->isdn_channel; 1188 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL; 1189 c.parm.aux.subcmd = ETX; 1190 isdn_command(&c); 1191 } 1192 info->vonline = 0; 1193#ifdef ISDN_DEBUG_MODEM_VOICE 1194 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c); 1195#endif 1196 info->xmit_count += cc; 1197 } else 1198#endif 1199 info->xmit_count += c; 1200 } else { 1201 info->msr |= UART_MSR_CTS; 1202 info->lsr |= UART_LSR_TEMT; 1203 if (info->dialing) { 1204 info->dialing = 0; 1205#ifdef ISDN_DEBUG_MODEM_HUP 1206 printk(KERN_DEBUG "Mhup in isdn_tty_write\n"); 1207#endif 1208 isdn_tty_modem_result(RESULT_NO_CARRIER, info); 1209 isdn_tty_modem_hup(info, 1); 1210 } else 1211 c = isdn_tty_edit_at(buf, c, info); 1212 } 1213 buf += c; 1214 count -= c; 1215 total += c; 1216 } 1217 atomic_dec(&info->xmit_lock); 1218 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) { 1219 if (m->mdmreg[REG_DXMT] & BIT_DXMT) { 1220 isdn_tty_senddown(info); 1221 isdn_tty_tint(info); 1222 } 1223 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1); 1224 } 1225 return total; 1226} 1227 1228static int 1229isdn_tty_write_room(struct tty_struct *tty) 1230{ 1231 modem_info *info = (modem_info *) tty->driver_data; 1232 int ret; 1233 1234 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room")) 1235 return 0; 1236 if (!info->online) 1237 return info->xmit_size; 1238 ret = info->xmit_size - info->xmit_count; 1239 return (ret < 0) ? 0 : ret; 1240} 1241 1242static int 1243isdn_tty_chars_in_buffer(struct tty_struct *tty) 1244{ 1245 modem_info *info = (modem_info *) tty->driver_data; 1246 1247 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer")) 1248 return 0; 1249 if (!info->online) 1250 return 0; 1251 return (info->xmit_count); 1252} 1253 1254static void 1255isdn_tty_flush_buffer(struct tty_struct *tty) 1256{ 1257 modem_info *info; 1258 1259 if (!tty) { 1260 return; 1261 } 1262 info = (modem_info *) tty->driver_data; 1263 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) { 1264 return; 1265 } 1266 isdn_tty_cleanup_xmit(info); 1267 info->xmit_count = 0; 1268 tty_wakeup(tty); 1269} 1270 1271static void 1272isdn_tty_flush_chars(struct tty_struct *tty) 1273{ 1274 modem_info *info = (modem_info *) tty->driver_data; 1275 1276 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars")) 1277 return; 1278 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) 1279 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1); 1280} 1281 1282/* 1283 * ------------------------------------------------------------ 1284 * isdn_tty_throttle() 1285 * 1286 * This routine is called by the upper-layer tty layer to signal that 1287 * incoming characters should be throttled. 1288 * ------------------------------------------------------------ 1289 */ 1290static void 1291isdn_tty_throttle(struct tty_struct *tty) 1292{ 1293 modem_info *info = (modem_info *) tty->driver_data; 1294 1295 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle")) 1296 return; 1297 if (I_IXOFF(tty)) 1298 info->x_char = STOP_CHAR(tty); 1299 info->mcr &= ~UART_MCR_RTS; 1300} 1301 1302static void 1303isdn_tty_unthrottle(struct tty_struct *tty) 1304{ 1305 modem_info *info = (modem_info *) tty->driver_data; 1306 1307 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle")) 1308 return; 1309 if (I_IXOFF(tty)) { 1310 if (info->x_char) 1311 info->x_char = 0; 1312 else 1313 info->x_char = START_CHAR(tty); 1314 } 1315 info->mcr |= UART_MCR_RTS; 1316} 1317 1318/* 1319 * ------------------------------------------------------------ 1320 * isdn_tty_ioctl() and friends 1321 * ------------------------------------------------------------ 1322 */ 1323 1324/* 1325 * isdn_tty_get_lsr_info - get line status register info 1326 * 1327 * Purpose: Let user call ioctl() to get info when the UART physically 1328 * is emptied. On bus types like RS485, the transmitter must 1329 * release the bus after transmitting. This must be done when 1330 * the transmit shift register is empty, not be done when the 1331 * transmit holding register is empty. This functionality 1332 * allows RS485 driver to be written in user space. 1333 */ 1334static int 1335isdn_tty_get_lsr_info(modem_info * info, uint __user * value) 1336{ 1337 u_char status; 1338 uint result; 1339 1340 status = info->lsr; 1341 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); 1342 return put_user(result, value); 1343} 1344 1345 1346static int 1347isdn_tty_tiocmget(struct tty_struct *tty, struct file *file) 1348{ 1349 modem_info *info = (modem_info *) tty->driver_data; 1350 u_char control, status; 1351 1352 if (isdn_tty_paranoia_check(info, tty->name, __func__)) 1353 return -ENODEV; 1354 if (tty->flags & (1 << TTY_IO_ERROR)) 1355 return -EIO; 1356 1357 lock_kernel(); 1358#ifdef ISDN_DEBUG_MODEM_IOCTL 1359 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line); 1360#endif 1361 1362 control = info->mcr; 1363 status = info->msr; 1364 unlock_kernel(); 1365 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) 1366 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) 1367 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) 1368 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) 1369 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) 1370 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); 1371} 1372 1373static int 1374isdn_tty_tiocmset(struct tty_struct *tty, struct file *file, 1375 unsigned int set, unsigned int clear) 1376{ 1377 modem_info *info = (modem_info *) tty->driver_data; 1378 1379 if (isdn_tty_paranoia_check(info, tty->name, __func__)) 1380 return -ENODEV; 1381 if (tty->flags & (1 << TTY_IO_ERROR)) 1382 return -EIO; 1383 1384#ifdef ISDN_DEBUG_MODEM_IOCTL 1385 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear); 1386#endif 1387 1388 lock_kernel(); 1389 if (set & TIOCM_RTS) 1390 info->mcr |= UART_MCR_RTS; 1391 if (set & TIOCM_DTR) { 1392 info->mcr |= UART_MCR_DTR; 1393 isdn_tty_modem_ncarrier(info); 1394 } 1395 1396 if (clear & TIOCM_RTS) 1397 info->mcr &= ~UART_MCR_RTS; 1398 if (clear & TIOCM_DTR) { 1399 info->mcr &= ~UART_MCR_DTR; 1400 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) { 1401 isdn_tty_modem_reset_regs(info, 0); 1402#ifdef ISDN_DEBUG_MODEM_HUP 1403 printk(KERN_DEBUG "Mhup in TIOCMSET\n"); 1404#endif 1405 if (info->online) 1406 info->ncarrier = 1; 1407 isdn_tty_modem_hup(info, 1); 1408 } 1409 } 1410 unlock_kernel(); 1411 return 0; 1412} 1413 1414static int 1415isdn_tty_ioctl(struct tty_struct *tty, struct file *file, 1416 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[40]; 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 sprintf(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