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 (fritz@isdn4linux.de)
   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                 strscpy(&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         tty_port_set_check_carrier(port, ~cflag & CLOCAL);
1047 }
1048
1049 static int
1050 isdn_tty_startup(modem_info *info)
1051 {
1052         if (tty_port_initialized(&info->port))
1053                 return 0;
1054         isdn_lock_drivers();
1055 #ifdef ISDN_DEBUG_MODEM_OPEN
1056         printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1057 #endif
1058         /*
1059          * Now, initialize the UART
1060          */
1061         info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1062         if (info->port.tty)
1063                 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1064         /*
1065          * and set the speed of the serial port
1066          */
1067         isdn_tty_change_speed(info);
1068
1069         tty_port_set_initialized(&info->port, 1);
1070         info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1071         info->send_outstanding = 0;
1072         return 0;
1073 }
1074
1075 /*
1076  * This routine will shutdown a serial port; interrupts are disabled, and
1077  * DTR is dropped if the hangup on close termio flag is on.
1078  */
1079 static void
1080 isdn_tty_shutdown(modem_info *info)
1081 {
1082         if (!tty_port_initialized(&info->port))
1083                 return;
1084 #ifdef ISDN_DEBUG_MODEM_OPEN
1085         printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1086 #endif
1087         isdn_unlock_drivers();
1088         info->msr &= ~UART_MSR_RI;
1089         if (!info->port.tty || (info->port.tty->termios.c_cflag & HUPCL)) {
1090                 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1091                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1092                         isdn_tty_modem_reset_regs(info, 0);
1093 #ifdef ISDN_DEBUG_MODEM_HUP
1094                         printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1095 #endif
1096                         isdn_tty_modem_hup(info, 1);
1097                 }
1098         }
1099         if (info->port.tty)
1100                 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1101
1102         tty_port_set_initialized(&info->port, 0);
1103 }
1104
1105 /* isdn_tty_write() is the main send-routine. It is called from the upper
1106  * levels within the kernel to perform sending data. Depending on the
1107  * online-flag it either directs output to the at-command-interpreter or
1108  * to the lower level. Additional tasks done here:
1109  *  - If online, check for escape-sequence (+++)
1110  *  - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1111  *  - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1112  *  - If dialing, abort dial.
1113  */
1114 static int
1115 isdn_tty_write(struct tty_struct *tty, const u_char *buf, int count)
1116 {
1117         int c;
1118         int total = 0;
1119         modem_info *info = (modem_info *) tty->driver_data;
1120         atemu *m = &info->emu;
1121
1122         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1123                 return 0;
1124         /* See isdn_tty_senddown() */
1125         atomic_inc(&info->xmit_lock);
1126         while (1) {
1127                 c = count;
1128                 if (c > info->xmit_size - info->xmit_count)
1129                         c = info->xmit_size - info->xmit_count;
1130                 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1131                         c = dev->drv[info->isdn_driver]->maxbufsize;
1132                 if (c <= 0)
1133                         break;
1134                 if ((info->online > 1)
1135 #ifdef CONFIG_ISDN_AUDIO
1136                     || (info->vonline & 3)
1137 #endif
1138                         ) {
1139 #ifdef CONFIG_ISDN_AUDIO
1140                         if (!info->vonline)
1141 #endif
1142                                 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1143                                                    &(m->pluscount),
1144                                                    &(m->lastplus));
1145                         memcpy(&info->port.xmit_buf[info->xmit_count], buf, c);
1146 #ifdef CONFIG_ISDN_AUDIO
1147                         if (info->vonline) {
1148                                 int cc = isdn_tty_handleDLEdown(info, m, c);
1149                                 if (info->vonline & 2) {
1150                                         if (!cc) {
1151                                                 /* If DLE decoding results in zero-transmit, but
1152                                                  * c originally was non-zero, do a wakeup.
1153                                                  */
1154                                                 tty_wakeup(tty);
1155                                                 info->msr |= UART_MSR_CTS;
1156                                                 info->lsr |= UART_LSR_TEMT;
1157                                         }
1158                                         info->xmit_count += cc;
1159                                 }
1160                                 if ((info->vonline & 3) == 1) {
1161                                         /* Do NOT handle Ctrl-Q or Ctrl-S
1162                                          * when in full-duplex audio mode.
1163                                          */
1164                                         if (isdn_tty_end_vrx(buf, c)) {
1165                                                 info->vonline &= ~1;
1166 #ifdef ISDN_DEBUG_MODEM_VOICE
1167                                                 printk(KERN_DEBUG
1168                                                        "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1169                                                        info->line);
1170 #endif
1171                                                 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1172                                         }
1173                                 }
1174                         } else
1175                                 if (TTY_IS_FCLASS1(info)) {
1176                                         int cc = isdn_tty_handleDLEdown(info, m, c);
1177
1178                                         if (info->vonline & 4) { /* ETX seen */
1179                                                 isdn_ctrl c;
1180
1181                                                 c.command = ISDN_CMD_FAXCMD;
1182                                                 c.driver = info->isdn_driver;
1183                                                 c.arg = info->isdn_channel;
1184                                                 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1185                                                 c.parm.aux.subcmd = ETX;
1186                                                 isdn_command(&c);
1187                                         }
1188                                         info->vonline = 0;
1189 #ifdef ISDN_DEBUG_MODEM_VOICE
1190                                         printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1191 #endif
1192                                         info->xmit_count += cc;
1193                                 } else
1194 #endif
1195                                         info->xmit_count += c;
1196                 } else {
1197                         info->msr |= UART_MSR_CTS;
1198                         info->lsr |= UART_LSR_TEMT;
1199                         if (info->dialing) {
1200                                 info->dialing = 0;
1201 #ifdef ISDN_DEBUG_MODEM_HUP
1202                                 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1203 #endif
1204                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1205                                 isdn_tty_modem_hup(info, 1);
1206                         } else
1207                                 c = isdn_tty_edit_at(buf, c, info);
1208                 }
1209                 buf += c;
1210                 count -= c;
1211                 total += c;
1212         }
1213         atomic_dec(&info->xmit_lock);
1214         if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1215                 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1216                         isdn_tty_senddown(info);
1217                         isdn_tty_tint(info);
1218                 }
1219                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1220         }
1221         return total;
1222 }
1223
1224 static int
1225 isdn_tty_write_room(struct tty_struct *tty)
1226 {
1227         modem_info *info = (modem_info *) tty->driver_data;
1228         int ret;
1229
1230         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1231                 return 0;
1232         if (!info->online)
1233                 return info->xmit_size;
1234         ret = info->xmit_size - info->xmit_count;
1235         return (ret < 0) ? 0 : ret;
1236 }
1237
1238 static int
1239 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1240 {
1241         modem_info *info = (modem_info *) tty->driver_data;
1242
1243         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1244                 return 0;
1245         if (!info->online)
1246                 return 0;
1247         return (info->xmit_count);
1248 }
1249
1250 static void
1251 isdn_tty_flush_buffer(struct tty_struct *tty)
1252 {
1253         modem_info *info;
1254
1255         if (!tty) {
1256                 return;
1257         }
1258         info = (modem_info *) tty->driver_data;
1259         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1260                 return;
1261         }
1262         isdn_tty_cleanup_xmit(info);
1263         info->xmit_count = 0;
1264         tty_wakeup(tty);
1265 }
1266
1267 static void
1268 isdn_tty_flush_chars(struct tty_struct *tty)
1269 {
1270         modem_info *info = (modem_info *) tty->driver_data;
1271
1272         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1273                 return;
1274         if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1275                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1276 }
1277
1278 /*
1279  * ------------------------------------------------------------
1280  * isdn_tty_throttle()
1281  *
1282  * This routine is called by the upper-layer tty layer to signal that
1283  * incoming characters should be throttled.
1284  * ------------------------------------------------------------
1285  */
1286 static void
1287 isdn_tty_throttle(struct tty_struct *tty)
1288 {
1289         modem_info *info = (modem_info *) tty->driver_data;
1290
1291         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1292                 return;
1293         if (I_IXOFF(tty))
1294                 info->x_char = STOP_CHAR(tty);
1295         info->mcr &= ~UART_MCR_RTS;
1296 }
1297
1298 static void
1299 isdn_tty_unthrottle(struct tty_struct *tty)
1300 {
1301         modem_info *info = (modem_info *) tty->driver_data;
1302
1303         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1304                 return;
1305         if (I_IXOFF(tty)) {
1306                 if (info->x_char)
1307                         info->x_char = 0;
1308                 else
1309                         info->x_char = START_CHAR(tty);
1310         }
1311         info->mcr |= UART_MCR_RTS;
1312 }
1313
1314 /*
1315  * ------------------------------------------------------------
1316  * isdn_tty_ioctl() and friends
1317  * ------------------------------------------------------------
1318  */
1319
1320 /*
1321  * isdn_tty_get_lsr_info - get line status register info
1322  *
1323  * Purpose: Let user call ioctl() to get info when the UART physically
1324  *          is emptied.  On bus types like RS485, the transmitter must
1325  *          release the bus after transmitting. This must be done when
1326  *          the transmit shift register is empty, not be done when the
1327  *          transmit holding register is empty.  This functionality
1328  *          allows RS485 driver to be written in user space.
1329  */
1330 static int
1331 isdn_tty_get_lsr_info(modem_info *info, uint __user *value)
1332 {
1333         u_char status;
1334         uint result;
1335
1336         status = info->lsr;
1337         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1338         return put_user(result, value);
1339 }
1340
1341
1342 static int
1343 isdn_tty_tiocmget(struct tty_struct *tty)
1344 {
1345         modem_info *info = (modem_info *) tty->driver_data;
1346         u_char control, status;
1347
1348         if (isdn_tty_paranoia_check(info, tty->name, __func__))
1349                 return -ENODEV;
1350         if (tty_io_error(tty))
1351                 return -EIO;
1352
1353         mutex_lock(&modem_info_mutex);
1354 #ifdef ISDN_DEBUG_MODEM_IOCTL
1355         printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1356 #endif
1357
1358         control = info->mcr;
1359         status = info->msr;
1360         mutex_unlock(&modem_info_mutex);
1361         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1362                 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1363                 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1364                 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1365                 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1366                 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1367 }
1368
1369 static int
1370 isdn_tty_tiocmset(struct tty_struct *tty,
1371                   unsigned int set, unsigned int clear)
1372 {
1373         modem_info *info = (modem_info *) tty->driver_data;
1374
1375         if (isdn_tty_paranoia_check(info, tty->name, __func__))
1376                 return -ENODEV;
1377         if (tty_io_error(tty))
1378                 return -EIO;
1379
1380 #ifdef ISDN_DEBUG_MODEM_IOCTL
1381         printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1382 #endif
1383
1384         mutex_lock(&modem_info_mutex);
1385         if (set & TIOCM_RTS)
1386                 info->mcr |= UART_MCR_RTS;
1387         if (set & TIOCM_DTR) {
1388                 info->mcr |= UART_MCR_DTR;
1389                 isdn_tty_modem_ncarrier(info);
1390         }
1391
1392         if (clear & TIOCM_RTS)
1393                 info->mcr &= ~UART_MCR_RTS;
1394         if (clear & TIOCM_DTR) {
1395                 info->mcr &= ~UART_MCR_DTR;
1396                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1397                         isdn_tty_modem_reset_regs(info, 0);
1398 #ifdef ISDN_DEBUG_MODEM_HUP
1399                         printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1400 #endif
1401                         if (info->online)
1402                                 info->ncarrier = 1;
1403                         isdn_tty_modem_hup(info, 1);
1404                 }
1405         }
1406         mutex_unlock(&modem_info_mutex);
1407         return 0;
1408 }
1409
1410 static int
1411 isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg)
1412 {
1413         modem_info *info = (modem_info *) tty->driver_data;
1414         int retval;
1415
1416         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1417                 return -ENODEV;
1418         if (tty_io_error(tty))
1419                 return -EIO;
1420         switch (cmd) {
1421         case TCSBRK:   /* SVID version: non-zero arg --> no break */
1422 #ifdef ISDN_DEBUG_MODEM_IOCTL
1423                 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1424 #endif
1425                 retval = tty_check_change(tty);
1426                 if (retval)
1427                         return retval;
1428                 tty_wait_until_sent(tty, 0);
1429                 return 0;
1430         case TCSBRKP:  /* support for POSIX tcsendbreak() */
1431 #ifdef ISDN_DEBUG_MODEM_IOCTL
1432                 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1433 #endif
1434                 retval = tty_check_change(tty);
1435                 if (retval)
1436                         return retval;
1437                 tty_wait_until_sent(tty, 0);
1438                 return 0;
1439         case TIOCSERGETLSR:     /* Get line status register */
1440 #ifdef ISDN_DEBUG_MODEM_IOCTL
1441                 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1442 #endif
1443                 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1444         default:
1445 #ifdef ISDN_DEBUG_MODEM_IOCTL
1446                 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1447 #endif
1448                 return -ENOIOCTLCMD;
1449         }
1450         return 0;
1451 }
1452
1453 static void
1454 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1455 {
1456         modem_info *info = (modem_info *) tty->driver_data;
1457
1458         mutex_lock(&modem_info_mutex);
1459         if (!old_termios)
1460                 isdn_tty_change_speed(info);
1461         else {
1462                 if (tty->termios.c_cflag == old_termios->c_cflag &&
1463                     tty->termios.c_ispeed == old_termios->c_ispeed &&
1464                     tty->termios.c_ospeed == old_termios->c_ospeed) {
1465                         mutex_unlock(&modem_info_mutex);
1466                         return;
1467                 }
1468                 isdn_tty_change_speed(info);
1469         }
1470         mutex_unlock(&modem_info_mutex);
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 (tty_port_initialized(port)) {
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         tty_port_set_active(port, 0);
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                             tty_port_active(&info->port) &&
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 int
2022 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2023 {
2024         int mi;
2025         modem_info *info;
2026         char *e;
2027
2028         if (i < 0)
2029                 return 0;
2030         if ((mi = dev->m_idx[i]) >= 0) {
2031                 info = &dev->mdm.info[mi];
2032                 switch (c->command) {
2033                 case ISDN_STAT_CINF:
2034                         printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2035                         info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2036                         if (e == (char *)c->parm.num)
2037                                 info->emu.charge = 0;
2038
2039                         break;
2040                 case ISDN_STAT_BSENT:
2041 #ifdef ISDN_TTY_STAT_DEBUG
2042                         printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2043 #endif
2044                         if ((info->isdn_driver == c->driver) &&
2045                             (info->isdn_channel == c->arg)) {
2046                                 info->msr |= UART_MSR_CTS;
2047                                 if (info->send_outstanding)
2048                                         if (!(--info->send_outstanding))
2049                                                 info->lsr |= UART_LSR_TEMT;
2050                                 isdn_tty_tint(info);
2051                                 return 1;
2052                         }
2053                         break;
2054                 case ISDN_STAT_CAUSE:
2055 #ifdef ISDN_TTY_STAT_DEBUG
2056                         printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2057 #endif
2058                         /* Signal cause to tty-device */
2059                         strncpy(info->last_cause, c->parm.num, 5);
2060                         return 1;
2061                 case ISDN_STAT_DISPLAY:
2062 #ifdef ISDN_TTY_STAT_DEBUG
2063                         printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2064 #endif
2065                         /* Signal display to tty-device */
2066                         if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2067                             !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2068                                 isdn_tty_at_cout("\r\n", info);
2069                                 isdn_tty_at_cout("DISPLAY: ", info);
2070                                 isdn_tty_at_cout(c->parm.display, info);
2071                                 isdn_tty_at_cout("\r\n", info);
2072                         }
2073                         return 1;
2074                 case ISDN_STAT_DCONN:
2075 #ifdef ISDN_TTY_STAT_DEBUG
2076                         printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2077 #endif
2078                         if (tty_port_active(&info->port)) {
2079                                 if (info->dialing == 1) {
2080                                         info->dialing = 2;
2081                                         return 1;
2082                                 }
2083                         }
2084                         break;
2085                 case ISDN_STAT_DHUP:
2086 #ifdef ISDN_TTY_STAT_DEBUG
2087                         printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2088 #endif
2089                         if (tty_port_active(&info->port)) {
2090                                 if (info->dialing == 1)
2091                                         isdn_tty_modem_result(RESULT_BUSY, info);
2092                                 if (info->dialing > 1)
2093                                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2094                                 info->dialing = 0;
2095 #ifdef ISDN_DEBUG_MODEM_HUP
2096                                 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2097 #endif
2098                                 isdn_tty_modem_hup(info, 0);
2099                                 return 1;
2100                         }
2101                         break;
2102                 case ISDN_STAT_BCONN:
2103 #ifdef ISDN_TTY_STAT_DEBUG
2104                         printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2105 #endif
2106                         /* Wake up any processes waiting
2107                          * for incoming call of this device when
2108                          * DCD follow the state of incoming carrier
2109                          */
2110                         if (info->port.blocked_open &&
2111                             (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2112                                 wake_up_interruptible(&info->port.open_wait);
2113                         }
2114
2115                         /* Schedule CONNECT-Message to any tty
2116                          * waiting for it and
2117                          * set DCD-bit of its modem-status.
2118                          */
2119                         if (tty_port_active(&info->port) ||
2120                             (info->port.blocked_open &&
2121                              (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2122                                 info->msr |= UART_MSR_DCD;
2123                                 info->emu.charge = 0;
2124                                 if (info->dialing & 0xf)
2125                                         info->last_dir = 1;
2126                                 else
2127                                         info->last_dir = 0;
2128                                 info->dialing = 0;
2129                                 info->rcvsched = 1;
2130                                 if (USG_MODEM(dev->usage[i])) {
2131                                         if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2132                                                 strcpy(info->emu.connmsg, c->parm.num);
2133                                                 isdn_tty_modem_result(RESULT_CONNECT, info);
2134                                         } else
2135                                                 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2136                                 }
2137                                 if (USG_VOICE(dev->usage[i]))
2138                                         isdn_tty_modem_result(RESULT_VCON, info);
2139                                 return 1;
2140                         }
2141                         break;
2142                 case ISDN_STAT_BHUP:
2143 #ifdef ISDN_TTY_STAT_DEBUG
2144                         printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2145 #endif
2146                         if (tty_port_active(&info->port)) {
2147 #ifdef ISDN_DEBUG_MODEM_HUP
2148                                 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2149 #endif
2150                                 isdn_tty_modem_hup(info, 0);
2151                                 return 1;
2152                         }
2153                         break;
2154                 case ISDN_STAT_NODCH:
2155 #ifdef ISDN_TTY_STAT_DEBUG
2156                         printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2157 #endif
2158                         if (tty_port_active(&info->port)) {
2159                                 if (info->dialing) {
2160                                         info->dialing = 0;
2161                                         info->last_l2 = -1;
2162                                         info->last_si = 0;
2163                                         sprintf(info->last_cause, "0000");
2164                                         isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2165                                 }
2166                                 isdn_tty_modem_hup(info, 0);
2167                                 return 1;
2168                         }
2169                         break;
2170                 case ISDN_STAT_UNLOAD:
2171 #ifdef ISDN_TTY_STAT_DEBUG
2172                         printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2173 #endif
2174                         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2175                                 info = &dev->mdm.info[i];
2176                                 if (info->isdn_driver == c->driver) {
2177                                         if (info->online)
2178                                                 isdn_tty_modem_hup(info, 1);
2179                                 }
2180                         }
2181                         return 1;
2182 #ifdef CONFIG_ISDN_TTY_FAX
2183                 case ISDN_STAT_FAXIND:
2184                         if (tty_port_active(&info->port)) {
2185                                 isdn_tty_fax_command(info, c);
2186                         }
2187                         break;
2188 #endif
2189 #ifdef CONFIG_ISDN_AUDIO
2190                 case ISDN_STAT_AUDIO:
2191                         if (tty_port_active(&info->port)) {
2192                                 switch (c->parm.num[0]) {
2193                                 case ISDN_AUDIO_DTMF:
2194                                         if (info->vonline) {
2195                                                 isdn_audio_put_dle_code(info,
2196                                                                         c->parm.num[1]);
2197                                         }
2198                                         break;
2199                                 }
2200                         }
2201                         break;
2202 #endif
2203                 }
2204         }
2205         return 0;
2206 }
2207
2208 /*********************************************************************
2209  Modem-Emulator-Routines
2210 *********************************************************************/
2211
2212 #define cmdchar(c) ((c >= ' ') && (c <= 0x7f))
2213
2214 /*
2215  * Put a message from the AT-emulator into receive-buffer of tty,
2216  * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2217  */
2218 void
2219 isdn_tty_at_cout(char *msg, modem_info *info)
2220 {
2221         struct tty_port *port = &info->port;
2222         atemu *m = &info->emu;
2223         char *p;
2224         char c;
2225         u_long flags;
2226         struct sk_buff *skb = NULL;
2227         char *sp = NULL;
2228         int l;
2229
2230         if (!msg) {
2231                 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2232                 return;
2233         }
2234
2235         l = strlen(msg);
2236
2237         spin_lock_irqsave(&info->readlock, flags);
2238         if (info->closing) {
2239                 spin_unlock_irqrestore(&info->readlock, flags);
2240                 return;
2241         }
2242
2243         /* use queue instead of direct, if online and */
2244         /* data is in queue or buffer is full */
2245         if (info->online && ((tty_buffer_request_room(port, l) < l) ||
2246                              !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2247                 skb = alloc_skb(l, GFP_ATOMIC);
2248                 if (!skb) {
2249                         spin_unlock_irqrestore(&info->readlock, flags);
2250                         return;
2251                 }
2252                 sp = skb_put(skb, l);
2253 #ifdef CONFIG_ISDN_AUDIO
2254                 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2255                 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2256 #endif
2257         }
2258
2259         for (p = msg; *p; p++) {
2260                 switch (*p) {
2261                 case '\r':
2262                         c = m->mdmreg[REG_CR];
2263                         break;
2264                 case '\n':
2265                         c = m->mdmreg[REG_LF];
2266                         break;
2267                 case '\b':
2268                         c = m->mdmreg[REG_BS];
2269                         break;
2270                 default:
2271                         c = *p;
2272                 }
2273                 if (skb) {
2274                         *sp++ = c;
2275                 } else {
2276                         if (tty_insert_flip_char(port, c, TTY_NORMAL) == 0)
2277                                 break;
2278                 }
2279         }
2280         if (skb) {
2281                 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2282                 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2283                 spin_unlock_irqrestore(&info->readlock, flags);
2284                 /* Schedule dequeuing */
2285                 if (dev->modempoll && info->rcvsched)
2286                         isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2287
2288         } else {
2289                 spin_unlock_irqrestore(&info->readlock, flags);
2290                 tty_flip_buffer_push(port);
2291         }
2292 }
2293
2294 /*
2295  * Perform ATH Hangup
2296  */
2297 static void
2298 isdn_tty_on_hook(modem_info *info)
2299 {
2300         if (info->isdn_channel >= 0) {
2301 #ifdef ISDN_DEBUG_MODEM_HUP
2302                 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2303 #endif
2304                 isdn_tty_modem_hup(info, 1);
2305         }
2306 }
2307
2308 static void
2309 isdn_tty_off_hook(void)
2310 {
2311         printk(KERN_DEBUG "isdn_tty_off_hook\n");
2312 }
2313
2314 #define PLUSWAIT1 (HZ / 2)      /* 0.5 sec. */
2315 #define PLUSWAIT2 (HZ * 3 / 2)  /* 1.5 sec */
2316
2317 /*
2318  * Check Buffer for Modem-escape-sequence, activate timer-callback to
2319  * isdn_tty_modem_escape() if sequence found.
2320  *
2321  * Parameters:
2322  *   p          pointer to databuffer
2323  *   plus       escape-character
2324  *   count      length of buffer
2325  *   pluscount  count of valid escape-characters so far
2326  *   lastplus   timestamp of last character
2327  */
2328 static void
2329 isdn_tty_check_esc(const u_char *p, u_char plus, int count, int *pluscount,
2330                    u_long *lastplus)
2331 {
2332         if (plus > 127)
2333                 return;
2334         if (count > 3) {
2335                 p += count - 3;
2336                 count = 3;
2337                 *pluscount = 0;
2338         }
2339         while (count > 0) {
2340                 if (*(p++) == plus) {
2341                         if ((*pluscount)++) {
2342                                 /* Time since last '+' > 0.5 sec. ? */
2343                                 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2344                                         *pluscount = 1;
2345                         } else {
2346                                 /* Time since last non-'+' < 1.5 sec. ? */
2347                                 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2348                                         *pluscount = 0;
2349                         }
2350                         if ((*pluscount == 3) && (count == 1))
2351                                 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2352                         if (*pluscount > 3)
2353                                 *pluscount = 1;
2354                 } else
2355                         *pluscount = 0;
2356                 *lastplus = jiffies;
2357                 count--;
2358         }
2359 }
2360
2361 /*
2362  * Return result of AT-emulator to tty-receive-buffer, depending on
2363  * modem-register 12, bit 0 and 1.
2364  * For CONNECT-messages also switch to online-mode.
2365  * For RING-message handle auto-ATA if register 0 != 0
2366  */
2367
2368 static void
2369 isdn_tty_modem_result(int code, modem_info *info)
2370 {
2371         atemu *m = &info->emu;
2372         static char *msg[] =
2373                 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2374                  "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2375                  "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2376         char s[ISDN_MSNLEN + 10];
2377
2378         switch (code) {
2379         case RESULT_RING:
2380                 m->mdmreg[REG_RINGCNT]++;
2381                 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2382                         /* Automatically accept incoming call */
2383                         isdn_tty_cmd_ATA(info);
2384                 break;
2385         case RESULT_NO_CARRIER:
2386 #ifdef ISDN_DEBUG_MODEM_HUP
2387                 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2388                        info->closing, !info->port.tty);
2389 #endif
2390                 m->mdmreg[REG_RINGCNT] = 0;
2391                 del_timer(&info->nc_timer);
2392                 info->ncarrier = 0;
2393                 if (info->closing || !info->port.tty)
2394                         return;
2395
2396 #ifdef CONFIG_ISDN_AUDIO
2397                 if (info->vonline & 1) {
2398 #ifdef ISDN_DEBUG_MODEM_VOICE
2399                         printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2400                                info->line);
2401 #endif
2402                         /* voice-recording, add DLE-ETX */
2403                         isdn_tty_at_cout("\020\003", info);
2404                 }
2405                 if (info->vonline & 2) {
2406 #ifdef ISDN_DEBUG_MODEM_VOICE
2407                         printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2408                                info->line);
2409 #endif
2410                         /* voice-playing, add DLE-DC4 */
2411                         isdn_tty_at_cout("\020\024", info);
2412                 }
2413 #endif
2414                 break;
2415         case RESULT_CONNECT:
2416         case RESULT_CONNECT64000:
2417                 sprintf(info->last_cause, "0000");
2418                 if (!info->online)
2419                         info->online = 2;
2420                 break;
2421         case RESULT_VCON:
2422 #ifdef ISDN_DEBUG_MODEM_VOICE
2423                 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2424                        info->line);
2425 #endif
2426                 sprintf(info->last_cause, "0000");
2427                 if (!info->online)
2428                         info->online = 1;
2429                 break;
2430         } /* switch (code) */
2431
2432         if (m->mdmreg[REG_RESP] & BIT_RESP) {
2433                 /* Show results */
2434                 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2435                         /* Show numeric results only */
2436                         sprintf(s, "\r\n%d\r\n", code);
2437                         isdn_tty_at_cout(s, info);
2438                 } else {
2439                         if (code == RESULT_RING) {
2440                                 /* return if "show RUNG" and ringcounter>1 */
2441                                 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2442                                     (m->mdmreg[REG_RINGCNT] > 1))
2443                                         return;
2444                                 /* print CID, _before_ _every_ ring */
2445                                 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2446                                         isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2447                                         isdn_tty_at_cout(dev->num[info->drv_index], info);
2448                                         if (m->mdmreg[REG_CDN] & BIT_CDN) {
2449                                                 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2450                                                 isdn_tty_at_cout(info->emu.cpn, info);
2451                                         }
2452                                 }
2453                         }
2454                         isdn_tty_at_cout("\r\n", info);
2455                         isdn_tty_at_cout(msg[code], info);
2456                         switch (code) {
2457                         case RESULT_CONNECT:
2458                                 switch (m->mdmreg[REG_L2PROT]) {
2459                                 case ISDN_PROTO_L2_MODEM:
2460                                         isdn_tty_at_cout(" ", info);
2461                                         isdn_tty_at_cout(m->connmsg, info);
2462                                         break;
2463                                 }
2464                                 break;
2465                         case RESULT_RING:
2466                                 /* Append CPN, if enabled */
2467                                 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2468                                         sprintf(s, "/%s", m->cpn);
2469                                         isdn_tty_at_cout(s, info);
2470                                 }
2471                                 /* Print CID only once, _after_ 1st RING */
2472                                 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2473                                     (m->mdmreg[REG_RINGCNT] == 1)) {
2474                                         isdn_tty_at_cout("\r\n", info);
2475                                         isdn_tty_at_cout("CALLER NUMBER: ", info);
2476                                         isdn_tty_at_cout(dev->num[info->drv_index], info);
2477                                         if (m->mdmreg[REG_CDN] & BIT_CDN) {
2478                                                 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2479                                                 isdn_tty_at_cout(info->emu.cpn, info);
2480                                         }
2481                                 }
2482                                 break;
2483                         case RESULT_NO_CARRIER:
2484                         case RESULT_NO_DIALTONE:
2485                         case RESULT_BUSY:
2486                         case RESULT_NO_ANSWER:
2487                                 m->mdmreg[REG_RINGCNT] = 0;
2488                                 /* Append Cause-Message if enabled */
2489                                 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2490                                         sprintf(s, "/%s", info->last_cause);
2491                                         isdn_tty_at_cout(s, info);
2492                                 }
2493                                 break;
2494                         case RESULT_CONNECT64000:
2495                                 /* Append Protocol to CONNECT message */
2496                                 switch (m->mdmreg[REG_L2PROT]) {
2497                                 case ISDN_PROTO_L2_X75I:
2498                                 case ISDN_PROTO_L2_X75UI:
2499                                 case ISDN_PROTO_L2_X75BUI:
2500                                         isdn_tty_at_cout("/X.75", info);
2501                                         break;
2502                                 case ISDN_PROTO_L2_HDLC:
2503                                         isdn_tty_at_cout("/HDLC", info);
2504                                         break;
2505                                 case ISDN_PROTO_L2_V11096:
2506                                         isdn_tty_at_cout("/V110/9600", info);
2507                                         break;
2508                                 case ISDN_PROTO_L2_V11019:
2509                                         isdn_tty_at_cout("/V110/19200", info);
2510                                         break;
2511                                 case ISDN_PROTO_L2_V11038:
2512                                         isdn_tty_at_cout("/V110/38400", info);
2513                                         break;
2514                                 }
2515                                 if (m->mdmreg[REG_T70] & BIT_T70) {
2516                                         isdn_tty_at_cout("/T.70", info);
2517                                         if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2518                                                 isdn_tty_at_cout("+", info);
2519                                 }
2520                                 break;
2521                         }
2522                         isdn_tty_at_cout("\r\n", info);
2523                 }
2524         }
2525         if (code == RESULT_NO_CARRIER) {
2526                 if (info->closing || (!info->port.tty))
2527                         return;
2528
2529                 if (tty_port_check_carrier(&info->port))
2530                         tty_hangup(info->port.tty);
2531         }
2532 }
2533
2534
2535 /*
2536  * Display a modem-register-value.
2537  */
2538 static void
2539 isdn_tty_show_profile(int ridx, modem_info *info)
2540 {
2541         char v[6];
2542
2543         sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2544         isdn_tty_at_cout(v, info);
2545 }
2546
2547 /*
2548  * Get MSN-string from char-pointer, set pointer to end of number
2549  */
2550 static void
2551 isdn_tty_get_msnstr(char *n, char **p)
2552 {
2553         int limit = ISDN_MSNLEN - 1;
2554
2555         while (((*p[0] >= '0' && *p[0] <= '9') ||
2556                 /* Why a comma ??? */
2557                 (*p[0] == ',') || (*p[0] == ':')) &&
2558                (limit--))
2559                 *n++ = *p[0]++;
2560         *n = '\0';
2561 }
2562
2563 /*
2564  * Get phone-number from modem-commandbuffer
2565  */
2566 static void
2567 isdn_tty_getdial(char *p, char *q, int cnt)
2568 {
2569         int first = 1;
2570         int limit = ISDN_MSNLEN - 1;    /* MUST match the size of interface var to avoid
2571                                            buffer overflow */
2572
2573         while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt > 0) {
2574                 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2575                     ((*p == 'R') && first) ||
2576                     (*p == '*') || (*p == '#')) {
2577                         *q++ = *p;
2578                         limit--;
2579                 }
2580                 if (!limit)
2581                         break;
2582                 p++;
2583                 first = 0;
2584         }
2585         *q = 0;
2586 }
2587
2588 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2589 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2590
2591 static void
2592 isdn_tty_report(modem_info *info)
2593 {
2594         atemu *m = &info->emu;
2595         char s[80];
2596
2597         isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2598         sprintf(s, "    Remote Number:    %s\r\n", info->last_num);
2599         isdn_tty_at_cout(s, info);
2600         sprintf(s, "    Direction:        %s\r\n", info->last_dir ? "outgoing" : "incoming");
2601         isdn_tty_at_cout(s, info);
2602         isdn_tty_at_cout("    Layer-2 Protocol: ", info);
2603         switch (info->last_l2) {
2604         case ISDN_PROTO_L2_X75I:
2605                 isdn_tty_at_cout("X.75i", info);
2606                 break;
2607         case ISDN_PROTO_L2_X75UI:
2608                 isdn_tty_at_cout("X.75ui", info);
2609                 break;
2610         case ISDN_PROTO_L2_X75BUI:
2611                 isdn_tty_at_cout("X.75bui", info);
2612                 break;
2613         case ISDN_PROTO_L2_HDLC:
2614                 isdn_tty_at_cout("HDLC", info);
2615                 break;
2616         case ISDN_PROTO_L2_V11096:
2617                 isdn_tty_at_cout("V.110 9600 Baud", info);
2618                 break;
2619         case ISDN_PROTO_L2_V11019:
2620                 isdn_tty_at_cout("V.110 19200 Baud", info);
2621                 break;
2622         case ISDN_PROTO_L2_V11038:
2623                 isdn_tty_at_cout("V.110 38400 Baud", info);
2624                 break;
2625         case ISDN_PROTO_L2_TRANS:
2626                 isdn_tty_at_cout("transparent", info);
2627                 break;
2628         case ISDN_PROTO_L2_MODEM:
2629                 isdn_tty_at_cout("modem", info);
2630                 break;
2631         case ISDN_PROTO_L2_FAX:
2632                 isdn_tty_at_cout("fax", info);
2633                 break;
2634         default:
2635                 isdn_tty_at_cout("unknown", info);
2636                 break;
2637         }
2638         if (m->mdmreg[REG_T70] & BIT_T70) {
2639                 isdn_tty_at_cout("/T.70", info);
2640                 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2641                         isdn_tty_at_cout("+", info);
2642         }
2643         isdn_tty_at_cout("\r\n", info);
2644         isdn_tty_at_cout("    Service:          ", info);
2645         switch (info->last_si) {
2646         case 1:
2647                 isdn_tty_at_cout("audio\r\n", info);
2648                 break;
2649         case 5:
2650                 isdn_tty_at_cout("btx\r\n", info);
2651                 break;
2652         case 7:
2653                 isdn_tty_at_cout("data\r\n", info);
2654                 break;
2655         default:
2656                 sprintf(s, "%d\r\n", info->last_si);
2657                 isdn_tty_at_cout(s, info);
2658                 break;
2659         }
2660         sprintf(s, "    Hangup location:  %s\r\n", info->last_lhup ? "local" : "remote");
2661         isdn_tty_at_cout(s, info);
2662         sprintf(s, "    Last cause:       %s\r\n", info->last_cause);
2663         isdn_tty_at_cout(s, info);
2664 }
2665
2666 /*
2667  * Parse AT&.. commands.
2668  */
2669 static int
2670 isdn_tty_cmd_ATand(char **p, modem_info *info)
2671 {
2672         atemu *m = &info->emu;
2673         int i;
2674         char rb[100];
2675
2676 #define MAXRB (sizeof(rb) - 1)
2677
2678         switch (*p[0]) {
2679         case 'B':
2680                 /* &B - Set Buffersize */
2681                 p[0]++;
2682                 i = isdn_getnum(p);
2683                 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2684                         PARSE_ERROR1;
2685 #ifdef CONFIG_ISDN_AUDIO
2686                 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2687                         PARSE_ERROR1;
2688 #endif
2689                 m->mdmreg[REG_PSIZE] = i / 16;
2690                 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2691                 switch (m->mdmreg[REG_L2PROT]) {
2692                 case ISDN_PROTO_L2_V11096:
2693                 case ISDN_PROTO_L2_V11019:
2694                 case ISDN_PROTO_L2_V11038:
2695                         info->xmit_size /= 10;
2696                 }
2697                 break;
2698         case 'C':
2699                 /* &C - DCD Status */
2700                 p[0]++;
2701                 switch (isdn_getnum(p)) {
2702                 case 0:
2703                         m->mdmreg[REG_DCD] &= ~BIT_DCD;
2704                         break;
2705                 case 1:
2706                         m->mdmreg[REG_DCD] |= BIT_DCD;
2707                         break;
2708                 default:
2709                         PARSE_ERROR1
2710                                 }
2711                 break;
2712         case 'D':
2713                 /* &D - Set DTR-Low-behavior */
2714                 p[0]++;
2715                 switch (isdn_getnum(p)) {
2716                 case 0:
2717                         m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2718                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2719                         break;
2720                 case 2:
2721                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2722                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2723                         break;
2724                 case 3:
2725                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2726                         m->mdmreg[REG_DTRR] |= BIT_DTRR;
2727                         break;
2728                 default:
2729                         PARSE_ERROR1
2730                                 }
2731                 break;
2732         case 'E':
2733                 /* &E -Set EAZ/MSN */
2734                 p[0]++;
2735                 isdn_tty_get_msnstr(m->msn, p);
2736                 break;
2737         case 'F':
2738                 /* &F -Set Factory-Defaults */
2739                 p[0]++;
2740                 if (info->msr & UART_MSR_DCD)
2741                         PARSE_ERROR1;
2742                 isdn_tty_reset_profile(m);
2743                 isdn_tty_modem_reset_regs(info, 1);
2744                 break;
2745 #ifdef DUMMY_HAYES_AT
2746         case 'K':
2747                 /* only for be compilant with common scripts */
2748                 /* &K Flowcontrol - no function */
2749                 p[0]++;
2750                 isdn_getnum(p);
2751                 break;
2752 #endif
2753         case 'L':
2754                 /* &L -Set Numbers to listen on */
2755                 p[0]++;
2756                 i = 0;
2757                 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2758                        (i < ISDN_LMSNLEN - 1))
2759                         m->lmsn[i++] = *p[0]++;
2760                 m->lmsn[i] = '\0';
2761                 break;
2762         case 'R':
2763                 /* &R - Set V.110 bitrate adaption */
2764                 p[0]++;
2765                 i = isdn_getnum(p);
2766                 switch (i) {
2767                 case 0:
2768                         /* Switch off V.110, back to X.75 */
2769                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2770                         m->mdmreg[REG_SI2] = 0;
2771                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2772                         break;
2773                 case 9600:
2774                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2775                         m->mdmreg[REG_SI2] = 197;
2776                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2777                         break;
2778                 case 19200:
2779                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2780                         m->mdmreg[REG_SI2] = 199;
2781                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2782                         break;
2783                 case 38400:
2784                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2785                         m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2786                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2787                         break;
2788                 default:
2789                         PARSE_ERROR1;
2790                 }
2791                 /* Switch off T.70 */
2792                 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2793                 /* Set Service 7 */
2794                 m->mdmreg[REG_SI1] |= 4;
2795                 break;
2796         case 'S':
2797                 /* &S - Set Windowsize */
2798                 p[0]++;
2799                 i = isdn_getnum(p);
2800                 if ((i > 0) && (i < 9))
2801                         m->mdmreg[REG_WSIZE] = i;
2802                 else
2803                         PARSE_ERROR1;
2804                 break;
2805         case 'V':
2806                 /* &V - Show registers */
2807                 p[0]++;
2808                 isdn_tty_at_cout("\r\n", info);
2809                 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2810                         sprintf(rb, "S%02d=%03d%s", i,
2811                                 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2812                         isdn_tty_at_cout(rb, info);
2813                 }
2814                 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2815                         strlen(m->msn) ? m->msn : "None");
2816                 isdn_tty_at_cout(rb, info);
2817                 if (strlen(m->lmsn)) {
2818                         isdn_tty_at_cout("\r\nListen: ", info);
2819                         isdn_tty_at_cout(m->lmsn, info);
2820                         isdn_tty_at_cout("\r\n", info);
2821                 }
2822                 break;
2823         case 'W':
2824                 /* &W - Write Profile */
2825                 p[0]++;
2826                 switch (*p[0]) {
2827                 case '0':
2828                         p[0]++;
2829                         modem_write_profile(m);
2830                         break;
2831                 default:
2832                         PARSE_ERROR1;
2833                 }
2834                 break;
2835         case 'X':
2836                 /* &X - Switch to BTX-Mode and T.70 */
2837                 p[0]++;
2838                 switch (isdn_getnum(p)) {
2839                 case 0:
2840                         m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2841                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2842                         break;
2843                 case 1:
2844                         m->mdmreg[REG_T70] |= BIT_T70;
2845                         m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2846                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2847                         info->xmit_size = 112;
2848                         m->mdmreg[REG_SI1] = 4;
2849                         m->mdmreg[REG_SI2] = 0;
2850                         break;
2851                 case 2:
2852                         m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2853                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2854                         info->xmit_size = 112;
2855                         m->mdmreg[REG_SI1] = 4;
2856                         m->mdmreg[REG_SI2] = 0;
2857                         break;
2858                 default:
2859                         PARSE_ERROR1;
2860                 }
2861                 break;
2862         default:
2863                 PARSE_ERROR1;
2864         }
2865         return 0;
2866 }
2867
2868 static int
2869 isdn_tty_check_ats(int mreg, int mval, modem_info *info, atemu *m)
2870 {
2871         /* Some plausibility checks */
2872         switch (mreg) {
2873         case REG_L2PROT:
2874                 if (mval > ISDN_PROTO_L2_MAX)
2875                         return 1;
2876                 break;
2877         case REG_PSIZE:
2878                 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2879                         return 1;
2880 #ifdef CONFIG_ISDN_AUDIO
2881                 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
2882                         return 1;
2883 #endif
2884                 info->xmit_size = mval * 16;
2885                 switch (m->mdmreg[REG_L2PROT]) {
2886                 case ISDN_PROTO_L2_V11096:
2887                 case ISDN_PROTO_L2_V11019:
2888                 case ISDN_PROTO_L2_V11038:
2889                         info->xmit_size /= 10;
2890                 }
2891                 break;
2892         case REG_SI1I:
2893         case REG_PLAN:
2894         case REG_SCREEN:
2895                 /* readonly registers */
2896                 return 1;
2897         }
2898         return 0;
2899 }
2900
2901 /*
2902  * Perform ATS command
2903  */
2904 static int
2905 isdn_tty_cmd_ATS(char **p, modem_info *info)
2906 {
2907         atemu *m = &info->emu;
2908         int bitpos;
2909         int mreg;
2910         int mval;
2911         int bval;
2912
2913         mreg = isdn_getnum(p);
2914         if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
2915                 PARSE_ERROR1;
2916         switch (*p[0]) {
2917         case '=':
2918                 p[0]++;
2919                 mval = isdn_getnum(p);
2920                 if (mval < 0 || mval > 255)
2921                         PARSE_ERROR1;
2922                 if (isdn_tty_check_ats(mreg, mval, info, m))
2923                         PARSE_ERROR1;
2924                 m->mdmreg[mreg] = mval;
2925                 break;
2926         case '.':
2927                 /* Set/Clear a single bit */
2928                 p[0]++;
2929                 bitpos = isdn_getnum(p);
2930                 if ((bitpos < 0) || (bitpos > 7))
2931                         PARSE_ERROR1;
2932                 switch (*p[0]) {
2933                 case '=':
2934                         p[0]++;
2935                         bval = isdn_getnum(p);
2936                         if (bval < 0 || bval > 1)
2937                                 PARSE_ERROR1;
2938                         if (bval)
2939                                 mval = m->mdmreg[mreg] | (1 << bitpos);
2940                         else
2941                                 mval = m->mdmreg[mreg] & ~(1 << bitpos);
2942                         if (isdn_tty_check_ats(mreg, mval, info, m))
2943                                 PARSE_ERROR1;
2944                         m->mdmreg[mreg] = mval;
2945                         break;
2946                 case '?':
2947                         p[0]++;
2948                         isdn_tty_at_cout("\r\n", info);
2949                         isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
2950                                          info);
2951                         break;
2952                 default:
2953                         PARSE_ERROR1;
2954                 }
2955                 break;
2956         case '?':
2957                 p[0]++;
2958                 isdn_tty_show_profile(mreg, info);
2959                 break;
2960         default:
2961                 PARSE_ERROR1;
2962                 break;
2963         }
2964         return 0;
2965 }
2966
2967 /*
2968  * Perform ATA command
2969  */
2970 static void
2971 isdn_tty_cmd_ATA(modem_info *info)
2972 {
2973         atemu *m = &info->emu;
2974         isdn_ctrl cmd;
2975         int l2;
2976
2977         if (info->msr & UART_MSR_RI) {
2978                 /* Accept incoming call */
2979                 info->last_dir = 0;
2980                 strcpy(info->last_num, dev->num[info->drv_index]);
2981                 m->mdmreg[REG_RINGCNT] = 0;
2982                 info->msr &= ~UART_MSR_RI;
2983                 l2 = m->mdmreg[REG_L2PROT];
2984 #ifdef CONFIG_ISDN_AUDIO
2985                 /* If more than one bit set in reg18, autoselect Layer2 */
2986                 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
2987                         if (m->mdmreg[REG_SI1I] == 1) {
2988                                 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
2989                                         l2 = ISDN_PROTO_L2_TRANS;
2990                         } else
2991                                 l2 = ISDN_PROTO_L2_X75I;
2992                 }
2993 #endif
2994                 cmd.driver = info->isdn_driver;
2995                 cmd.command = ISDN_CMD_SETL2;
2996                 cmd.arg = info->isdn_channel + (l2 << 8);
2997                 info->last_l2 = l2;
2998                 isdn_command(&cmd);
2999                 cmd.driver = info->isdn_driver;
3000                 cmd.command = ISDN_CMD_SETL3;
3001                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3002 #ifdef CONFIG_ISDN_TTY_FAX
3003                 if (l2 == ISDN_PROTO_L2_FAX) {
3004                         cmd.parm.fax = info->fax;
3005                         info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3006                 }
3007 #endif
3008                 isdn_command(&cmd);
3009                 cmd.driver = info->isdn_driver;
3010                 cmd.arg = info->isdn_channel;
3011                 cmd.command = ISDN_CMD_ACCEPTD;
3012                 info->dialing = 16;
3013                 info->emu.carrierwait = 0;
3014                 isdn_command(&cmd);
3015                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3016         } else
3017                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3018 }
3019
3020 #ifdef CONFIG_ISDN_AUDIO
3021 /*
3022  * Parse AT+F.. commands
3023  */
3024 static int
3025 isdn_tty_cmd_PLUSF(char **p, modem_info *info)
3026 {
3027         atemu *m = &info->emu;
3028         char rs[20];
3029
3030         if (!strncmp(p[0], "CLASS", 5)) {
3031                 p[0] += 5;
3032                 switch (*p[0]) {
3033                 case '?':
3034                         p[0]++;
3035                         sprintf(rs, "\r\n%d",
3036                                 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3037 #ifdef CONFIG_ISDN_TTY_FAX
3038                         if (TTY_IS_FCLASS2(info))
3039                                 sprintf(rs, "\r\n2");
3040                         else if (TTY_IS_FCLASS1(info))
3041                                 sprintf(rs, "\r\n1");
3042 #endif
3043                         isdn_tty_at_cout(rs, info);
3044                         break;
3045                 case '=':
3046                         p[0]++;
3047                         switch (*p[0]) {
3048                         case '0':
3049                                 p[0]++;
3050                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3051                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3052                                 m->mdmreg[REG_SI1] = 4;
3053                                 info->xmit_size =
3054                                         m->mdmreg[REG_PSIZE] * 16;
3055                                 break;
3056 #ifdef CONFIG_ISDN_TTY_FAX
3057                         case '1':
3058                                 p[0]++;
3059                                 if (!(dev->global_features &
3060                                       ISDN_FEATURE_L3_FCLASS1))
3061                                         PARSE_ERROR1;
3062                                 m->mdmreg[REG_SI1] = 1;
3063                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3064                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3065                                 info->xmit_size =
3066                                         m->mdmreg[REG_PSIZE] * 16;
3067                                 break;
3068                         case '2':
3069                                 p[0]++;
3070                                 if (!(dev->global_features &
3071                                       ISDN_FEATURE_L3_FCLASS2))
3072                                         PARSE_ERROR1;
3073                                 m->mdmreg[REG_SI1] = 1;
3074                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3075                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3076                                 info->xmit_size =
3077                                         m->mdmreg[REG_PSIZE] * 16;
3078                                 break;
3079 #endif
3080                         case '8':
3081                                 p[0]++;
3082                                 /* L2 will change on dialout with si=1 */
3083                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3084                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3085                                 m->mdmreg[REG_SI1] = 5;
3086                                 info->xmit_size = VBUF;
3087                                 break;
3088                         case '?':
3089                                 p[0]++;
3090                                 strcpy(rs, "\r\n0,");
3091 #ifdef CONFIG_ISDN_TTY_FAX
3092                                 if (dev->global_features &
3093                                     ISDN_FEATURE_L3_FCLASS1)
3094                                         strcat(rs, "1,");
3095                                 if (dev->global_features &
3096                                     ISDN_FEATURE_L3_FCLASS2)
3097                                         strcat(rs, "2,");
3098 #endif
3099                                 strcat(rs, "8");
3100                                 isdn_tty_at_cout(rs, info);
3101                                 break;
3102                         default:
3103                                 PARSE_ERROR1;
3104                         }
3105                         break;
3106                 default:
3107                         PARSE_ERROR1;
3108                 }
3109                 return 0;
3110         }
3111 #ifdef CONFIG_ISDN_TTY_FAX
3112         return (isdn_tty_cmd_PLUSF_FAX(p, info));
3113 #else
3114         PARSE_ERROR1;
3115 #endif
3116 }
3117
3118 /*
3119  * Parse AT+V.. commands
3120  */
3121 static int
3122 isdn_tty_cmd_PLUSV(char **p, modem_info *info)
3123 {
3124         atemu *m = &info->emu;
3125         isdn_ctrl cmd;
3126         static char *vcmd[] =
3127                 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3128         int i;
3129         int par1;
3130         int par2;
3131         char rs[20];
3132
3133         i = 0;
3134         while (vcmd[i]) {
3135                 if (!strncmp(vcmd[i], p[0], 2)) {
3136                         p[0] += 2;
3137                         break;
3138                 }
3139                 i++;
3140         }
3141         switch (i) {
3142         case 0:
3143                 /* AT+VNH - Auto hangup feature */
3144                 switch (*p[0]) {
3145                 case '?':
3146                         p[0]++;
3147                         isdn_tty_at_cout("\r\n1", info);
3148                         break;
3149                 case '=':
3150                         p[0]++;
3151                         switch (*p[0]) {
3152                         case '1':
3153                                 p[0]++;
3154                                 break;
3155                         case '?':
3156                                 p[0]++;
3157                                 isdn_tty_at_cout("\r\n1", info);
3158                                 break;
3159                         default:
3160                                 PARSE_ERROR1;
3161                         }
3162                         break;
3163                 default:
3164                         PARSE_ERROR1;
3165                 }
3166                 break;
3167         case 1:
3168                 /* AT+VIP - Reset all voice parameters */
3169                 isdn_tty_modem_reset_vpar(m);
3170                 break;
3171         case 2:
3172                 /* AT+VLS - Select device, accept incoming call */
3173                 switch (*p[0]) {
3174                 case '?':
3175                         p[0]++;
3176                         sprintf(rs, "\r\n%d", m->vpar[0]);
3177                         isdn_tty_at_cout(rs, info);
3178                         break;
3179                 case '=':
3180                         p[0]++;
3181                         switch (*p[0]) {
3182                         case '0':
3183                                 p[0]++;
3184                                 m->vpar[0] = 0;
3185                                 break;
3186                         case '2':
3187                                 p[0]++;
3188                                 m->vpar[0] = 2;
3189                                 break;
3190                         case '?':
3191                                 p[0]++;
3192                                 isdn_tty_at_cout("\r\n0,2", info);
3193                                 break;
3194                         default:
3195                                 PARSE_ERROR1;
3196                         }
3197                         break;
3198                 default:
3199                         PARSE_ERROR1;
3200                 }
3201                 break;
3202         case 3:
3203                 /* AT+VRX - Start recording */
3204                 if (!m->vpar[0])
3205                         PARSE_ERROR1;
3206                 if (info->online != 1) {
3207                         isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3208                         return 1;
3209                 }
3210                 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3211                 if (!info->dtmf_state) {
3212                         printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3213                         PARSE_ERROR1;
3214                 }
3215                 info->silence_state = isdn_audio_silence_init(info->silence_state);
3216                 if (!info->silence_state) {
3217                         printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3218                         PARSE_ERROR1;
3219                 }
3220                 if (m->vpar[3] < 5) {
3221                         info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3222                         if (!info->adpcmr) {
3223                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3224                                 PARSE_ERROR1;
3225                         }
3226                 }
3227 #ifdef ISDN_DEBUG_AT
3228                 printk(KERN_DEBUG "AT: +VRX\n");
3229 #endif
3230                 info->vonline |= 1;
3231                 isdn_tty_modem_result(RESULT_CONNECT, info);
3232                 return 0;
3233                 break;
3234         case 4:
3235                 /* AT+VSD - Silence detection */
3236                 switch (*p[0]) {
3237                 case '?':
3238                         p[0]++;
3239                         sprintf(rs, "\r\n<%d>,<%d>",
3240                                 m->vpar[1],
3241                                 m->vpar[2]);
3242                         isdn_tty_at_cout(rs, info);
3243                         break;
3244                 case '=':
3245                         p[0]++;
3246                         if ((*p[0] >= '0') && (*p[0] <= '9')) {
3247                                 par1 = isdn_getnum(p);
3248                                 if ((par1 < 0) || (par1 > 31))
3249                                         PARSE_ERROR1;
3250                                 if (*p[0] != ',')
3251                                         PARSE_ERROR1;
3252                                 p[0]++;
3253                                 par2 = isdn_getnum(p);
3254                                 if ((par2 < 0) || (par2 > 255))
3255                                         PARSE_ERROR1;
3256                                 m->vpar[1] = par1;
3257                                 m->vpar[2] = par2;
3258                                 break;
3259                         } else
3260                                 if (*p[0] == '?') {
3261                                         p[0]++;
3262                                         isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3263                                                          info);
3264                                         break;
3265                                 } else
3266                                         PARSE_ERROR1;
3267                         break;
3268                 default:
3269                         PARSE_ERROR1;
3270                 }
3271                 break;
3272         case 5:
3273                 /* AT+VSM - Select compression */
3274                 switch (*p[0]) {
3275                 case '?':
3276                         p[0]++;
3277                         sprintf(rs, "\r\n<%d>,<%d><8000>",
3278                                 m->vpar[3],
3279                                 m->vpar[1]);
3280                         isdn_tty_at_cout(rs, info);
3281                         break;
3282                 case '=':
3283                         p[0]++;
3284                         switch (*p[0]) {
3285                         case '2':
3286                         case '3':
3287                         case '4':
3288                         case '5':
3289                         case '6':
3290                                 par1 = isdn_getnum(p);
3291                                 if ((par1 < 2) || (par1 > 6))
3292                                         PARSE_ERROR1;
3293                                 m->vpar[3] = par1;
3294                                 break;
3295                         case '?':
3296                                 p[0]++;
3297                                 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3298                                                  info);
3299                                 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3300                                                  info);
3301                                 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3302                                                  info);
3303                                 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3304                                                  info);
3305                                 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3306                                                  info);
3307                                 break;
3308                         default:
3309                                 PARSE_ERROR1;
3310                         }
3311                         break;
3312                 default:
3313                         PARSE_ERROR1;
3314                 }
3315                 break;
3316         case 6:
3317                 /* AT+VTX - Start sending */
3318                 if (!m->vpar[0])
3319                         PARSE_ERROR1;
3320                 if (info->online != 1) {
3321                         isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3322                         return 1;
3323                 }
3324                 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3325                 if (!info->dtmf_state) {
3326                         printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3327                         PARSE_ERROR1;
3328                 }
3329                 if (m->vpar[3] < 5) {
3330                         info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3331                         if (!info->adpcms) {
3332                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3333                                 PARSE_ERROR1;
3334                         }
3335                 }
3336 #ifdef ISDN_DEBUG_AT
3337                 printk(KERN_DEBUG "AT: +VTX\n");
3338 #endif
3339                 m->lastDLE = 0;
3340                 info->vonline |= 2;
3341                 isdn_tty_modem_result(RESULT_CONNECT, info);
3342                 return 0;
3343                 break;
3344         case 7:
3345                 /* AT+VDD - DTMF detection */
3346                 switch (*p[0]) {
3347                 case '?':
3348                         p[0]++;
3349                         sprintf(rs, "\r\n<%d>,<%d>",
3350                                 m->vpar[4],
3351                                 m->vpar[5]);
3352                         isdn_tty_at_cout(rs, info);
3353                         break;
3354                 case '=':
3355                         p[0]++;
3356                         if ((*p[0] >= '0') && (*p[0] <= '9')) {
3357                                 if (info->online != 1)
3358                                         PARSE_ERROR1;
3359                                 par1 = isdn_getnum(p);
3360                                 if ((par1 < 0) || (par1 > 15))
3361                                         PARSE_ERROR1;
3362                                 if (*p[0] != ',')
3363                                         PARSE_ERROR1;
3364                                 p[0]++;
3365                                 par2 = isdn_getnum(p);
3366                                 if ((par2 < 0) || (par2 > 255))
3367                                         PARSE_ERROR1;
3368                                 m->vpar[4] = par1;
3369                                 m->vpar[5] = par2;
3370                                 cmd.driver = info->isdn_driver;
3371                                 cmd.command = ISDN_CMD_AUDIO;
3372                                 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3373                                 cmd.parm.num[0] = par1;
3374                                 cmd.parm.num[1] = par2;
3375                                 isdn_command(&cmd);
3376                                 break;
3377                         } else
3378                                 if (*p[0] == '?') {
3379                                         p[0]++;
3380                                         isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3381                                                          info);
3382                                         break;
3383                                 } else
3384                                         PARSE_ERROR1;
3385                         break;
3386                 default:
3387                         PARSE_ERROR1;
3388                 }
3389                 break;
3390         default:
3391                 PARSE_ERROR1;
3392         }
3393         return 0;
3394 }
3395 #endif                          /* CONFIG_ISDN_AUDIO */
3396
3397 /*
3398  * Parse and perform an AT-command-line.
3399  */
3400 static void
3401 isdn_tty_parse_at(modem_info *info)
3402 {
3403         atemu *m = &info->emu;
3404         char *p;
3405         char ds[ISDN_MSNLEN];
3406
3407 #ifdef ISDN_DEBUG_AT
3408         printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3409 #endif
3410         for (p = &m->mdmcmd[2]; *p;) {
3411                 switch (*p) {
3412                 case ' ':
3413                         p++;
3414                         break;
3415                 case 'A':
3416                         /* A - Accept incoming call */
3417                         p++;
3418                         isdn_tty_cmd_ATA(info);
3419                         return;
3420                 case 'D':
3421                         /* D - Dial */
3422                         if (info->msr & UART_MSR_DCD)
3423                                 PARSE_ERROR;
3424                         if (info->msr & UART_MSR_RI) {
3425                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3426                                 return;
3427                         }
3428                         isdn_tty_getdial(++p, ds, sizeof ds);
3429                         p += strlen(p);
3430                         if (!strlen(m->msn))
3431                                 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3432                         else if (strlen(ds))
3433                                 isdn_tty_dial(ds, info, m);
3434                         else
3435                                 PARSE_ERROR;
3436                         return;
3437                 case 'E':
3438                         /* E - Turn Echo on/off */
3439                         p++;
3440                         switch (isdn_getnum(&p)) {
3441                         case 0:
3442                                 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3443                                 break;
3444                         case 1:
3445                                 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3446                                 break;
3447                         default:
3448                                 PARSE_ERROR;
3449                         }
3450                         break;
3451                 case 'H':
3452                         /* H - On/Off-hook */
3453                         p++;
3454                         switch (*p) {
3455                         case '0':
3456                                 p++;
3457                                 isdn_tty_on_hook(info);
3458                                 break;
3459                         case '1':
3460                                 p++;
3461                                 isdn_tty_off_hook();
3462                                 break;
3463                         default:
3464                                 isdn_tty_on_hook(info);
3465                                 break;
3466                         }
3467                         break;
3468                 case 'I':
3469                         /* I - Information */
3470                         p++;
3471                         isdn_tty_at_cout("\r\nLinux ISDN", info);
3472                         switch (*p) {
3473                         case '0':
3474                         case '1':
3475                                 p++;
3476                                 break;
3477                         case '2':
3478                                 p++;
3479                                 isdn_tty_report(info);
3480                                 break;
3481                         case '3':
3482                                 p++;
3483                                 snprintf(ds, sizeof(ds), "\r\n%d", info->emu.charge);
3484                                 isdn_tty_at_cout(ds, info);
3485                                 break;
3486                         default:;
3487                         }
3488                         break;
3489 #ifdef DUMMY_HAYES_AT
3490                 case 'L':
3491                 case 'M':
3492                         /* only for be compilant with common scripts */
3493                         /* no function */
3494                         p++;
3495                         isdn_getnum(&p);
3496                         break;
3497 #endif
3498                 case 'O':
3499                         /* O - Go online */
3500                         p++;
3501                         if (info->msr & UART_MSR_DCD)
3502                                 /* if B-Channel is up */
3503                                 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT : RESULT_CONNECT64000, info);
3504                         else
3505                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3506                         return;
3507                 case 'Q':
3508                         /* Q - Turn Emulator messages on/off */
3509                         p++;
3510                         switch (isdn_getnum(&p)) {
3511                         case 0:
3512                                 m->mdmreg[REG_RESP] |= BIT_RESP;
3513                                 break;
3514                         case 1:
3515                                 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3516                                 break;
3517                         default:
3518                                 PARSE_ERROR;
3519                         }
3520                         break;
3521                 case 'S':
3522                         /* S - Set/Get Register */
3523                         p++;
3524                         if (isdn_tty_cmd_ATS(&p, info))
3525                                 return;
3526                         break;
3527                 case 'V':
3528                         /* V - Numeric or ASCII Emulator-messages */
3529                         p++;
3530                         switch (isdn_getnum(&p)) {
3531                         case 0:
3532                                 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3533                                 break;
3534                         case 1:
3535                                 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3536                                 break;
3537                         default:
3538                                 PARSE_ERROR;
3539                         }
3540                         break;
3541                 case 'Z':
3542                         /* Z - Load Registers from Profile */
3543                         p++;
3544                         if (info->msr & UART_MSR_DCD) {
3545                                 info->online = 0;
3546                                 isdn_tty_on_hook(info);
3547                         }
3548                         isdn_tty_modem_reset_regs(info, 1);
3549                         break;
3550                 case '+':
3551                         p++;
3552                         switch (*p) {
3553 #ifdef CONFIG_ISDN_AUDIO
3554                         case 'F':
3555                                 p++;
3556                                 if (isdn_tty_cmd_PLUSF(&p, info))
3557                                         return;
3558                                 break;
3559                         case 'V':
3560                                 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3561                                     (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3562                                         PARSE_ERROR;
3563                                 p++;
3564                                 if (isdn_tty_cmd_PLUSV(&p, info))
3565                                         return;
3566                                 break;
3567 #endif                          /* CONFIG_ISDN_AUDIO */
3568                         case 'S':       /* SUSPEND */
3569                                 p++;
3570                                 isdn_tty_get_msnstr(ds, &p);
3571                                 isdn_tty_suspend(ds, info, m);
3572                                 break;
3573                         case 'R':       /* RESUME */
3574                                 p++;
3575                                 isdn_tty_get_msnstr(ds, &p);
3576                                 isdn_tty_resume(ds, info, m);
3577                                 break;
3578                         case 'M':       /* MESSAGE */
3579                                 p++;
3580                                 isdn_tty_send_msg(info, m, p);
3581                                 break;
3582                         default:
3583                                 PARSE_ERROR;
3584                         }
3585                         break;
3586                 case '&':
3587                         p++;
3588                         if (isdn_tty_cmd_ATand(&p, info))
3589                                 return;
3590                         break;
3591                 default:
3592                         PARSE_ERROR;
3593                 }
3594         }
3595 #ifdef CONFIG_ISDN_AUDIO
3596         if (!info->vonline)
3597 #endif
3598                 isdn_tty_modem_result(RESULT_OK, info);
3599 }
3600
3601 /* Need own toupper() because standard-toupper is not available
3602  * within modules.
3603  */
3604 #define my_toupper(c) (((c >= 'a') && (c <= 'z')) ? (c & 0xdf) : c)
3605
3606 /*
3607  * Perform line-editing of AT-commands
3608  *
3609  * Parameters:
3610  *   p        inputbuffer
3611  *   count    length of buffer
3612  *   channel  index to line (minor-device)
3613  */
3614 static int
3615 isdn_tty_edit_at(const char *p, int count, modem_info *info)
3616 {
3617         atemu *m = &info->emu;
3618         int total = 0;
3619         u_char c;
3620         char eb[2];
3621         int cnt;
3622
3623         for (cnt = count; cnt > 0; p++, cnt--) {
3624                 c = *p;
3625                 total++;
3626                 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3627                         /* Separator (CR or LF) */
3628                         m->mdmcmd[m->mdmcmdl] = 0;
3629                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3630                                 eb[0] = c;
3631                                 eb[1] = 0;
3632                                 isdn_tty_at_cout(eb, info);
3633                         }
3634                         if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3635                                 isdn_tty_parse_at(info);
3636                         m->mdmcmdl = 0;
3637                         continue;
3638                 }
3639                 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3640                         /* Backspace-Function */
3641                         if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3642                                 if (m->mdmcmdl)
3643                                         m->mdmcmdl--;
3644                                 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3645                                         isdn_tty_at_cout("\b", info);
3646                         }
3647                         continue;
3648                 }
3649                 if (cmdchar(c)) {
3650                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3651                                 eb[0] = c;
3652                                 eb[1] = 0;
3653                                 isdn_tty_at_cout(eb, info);
3654                         }
3655                         if (m->mdmcmdl < 255) {
3656                                 c = my_toupper(c);
3657                                 switch (m->mdmcmdl) {
3658                                 case 1:
3659                                         if (c == 'T') {
3660                                                 m->mdmcmd[m->mdmcmdl] = c;
3661                                                 m->mdmcmd[++m->mdmcmdl] = 0;
3662                                                 break;
3663                                         } else
3664                                                 m->mdmcmdl = 0;
3665                                         /* Fall through, check for 'A' */
3666                                 case 0:
3667                                         if (c == 'A') {
3668                                                 m->mdmcmd[m->mdmcmdl] = c;
3669                                                 m->mdmcmd[++m->mdmcmdl] = 0;
3670                                         }
3671                                         break;
3672                                 default:
3673                                         m->mdmcmd[m->mdmcmdl] = c;
3674                                         m->mdmcmd[++m->mdmcmdl] = 0;
3675                                 }
3676                         }
3677                 }
3678         }
3679         return total;
3680 }
3681
3682 /*
3683  * Switch all modem-channels who are online and got a valid
3684  * escape-sequence 1.5 seconds ago, to command-mode.
3685  * This function is called every second via timer-interrupt from within
3686  * timer-dispatcher isdn_timer_function()
3687  */
3688 void
3689 isdn_tty_modem_escape(void)
3690 {
3691         int ton = 0;
3692         int i;
3693         int midx;
3694
3695         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3696                 if (USG_MODEM(dev->usage[i]) && (midx = dev->m_idx[i]) >= 0) {
3697                         modem_info *info = &dev->mdm.info[midx];
3698                         if (info->online) {
3699                                 ton = 1;
3700                                 if ((info->emu.pluscount == 3) &&
3701                                     time_after(jiffies,
3702                                             info->emu.lastplus + PLUSWAIT2)) {
3703                                         info->emu.pluscount = 0;
3704                                         info->online = 0;
3705                                         isdn_tty_modem_result(RESULT_OK, info);
3706                                 }
3707                         }
3708                 }
3709         isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3710 }
3711
3712 /*
3713  * Put a RING-message to all modem-channels who have the RI-bit set.
3714  * This function is called every second via timer-interrupt from within
3715  * timer-dispatcher isdn_timer_function()
3716  */
3717 void
3718 isdn_tty_modem_ring(void)
3719 {
3720         int ton = 0;
3721         int i;
3722
3723         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3724                 modem_info *info = &dev->mdm.info[i];
3725                 if (info->msr & UART_MSR_RI) {
3726                         ton = 1;
3727                         isdn_tty_modem_result(RESULT_RING, info);
3728                 }
3729         }
3730         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3731 }
3732
3733 /*
3734  * For all online tty's, try sending data to
3735  * the lower levels.
3736  */
3737 void
3738 isdn_tty_modem_xmit(void)
3739 {
3740         int ton = 1;
3741         int i;
3742
3743         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3744                 modem_info *info = &dev->mdm.info[i];
3745                 if (info->online) {
3746                         ton = 1;
3747                         isdn_tty_senddown(info);
3748                         isdn_tty_tint(info);
3749                 }
3750         }
3751         isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3752 }
3753
3754 /*
3755  * Check all channels if we have a 'no carrier' timeout.
3756  * Timeout value is set by Register S7.
3757  */
3758 void
3759 isdn_tty_carrier_timeout(void)
3760 {
3761         int ton = 0;
3762         int i;
3763
3764         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3765                 modem_info *info = &dev->mdm.info[i];
3766                 if (!info->dialing)
3767                         continue;
3768                 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3769                         info->dialing = 0;
3770                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3771                         isdn_tty_modem_hup(info, 1);
3772                 } else
3773                         ton = 1;
3774         }
3775         isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3776 }