drivers/isdn/i4l/isdn_tty.c

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