Pileus Git - ~andy/linux/blob - 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                 strncpy(&cmd.parm.cmsg.para[6], id, l);
 790                 cmd.command = CAPI_PUT_MESSAGE;
 791                 cmd.driver = info->isdn_driver;
 792                 cmd.arg = info->isdn_channel;
 793                 isdn_command(&cmd);
 794         }
 795 }
 796
 797 /* isdn_tty_resume() tries to resume a suspended call
 798  * setup of the lower levels before that. unfortunately here is no
 799  * checking for compatibility of used protocols implemented by Q931
 800  * It does the same things like isdn_tty_dial, the last command
 801  * is different, may be we can merge it.
 802  */
 803
 804 static void
 805 isdn_tty_resume(char *id, modem_info *info, atemu *m)
 806 {
 807         int usg = ISDN_USAGE_MODEM;
 808         int si = 7;
 809         int l2 = m->mdmreg[REG_L2PROT];
 810         isdn_ctrl cmd;
 811         ulong flags;
 812         int i;
 813         int j;
 814         int l;
 815
 816         l = strlen(id);
 817         for (j = 7; j >= 0; j--)
 818                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 819                         si = bit2si[j];
 820                         break;
 821                 }
 822         usg = isdn_calc_usage(si, l2);
 823 #ifdef CONFIG_ISDN_AUDIO
 824         if ((si == 1) &&
 825             (l2 != ISDN_PROTO_L2_MODEM)
 826 #ifdef CONFIG_ISDN_TTY_FAX
 827             && (l2 != ISDN_PROTO_L2_FAX)
 828 #endif
 829                 ) {
 830                 l2 = ISDN_PROTO_L2_TRANS;
 831                 usg = ISDN_USAGE_VOICE;
 832         }
 833 #endif
 834         m->mdmreg[REG_SI1I] = si2bit[si];
 835         spin_lock_irqsave(&dev->lock, flags);
 836         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 837         if (i < 0) {
 838                 spin_unlock_irqrestore(&dev->lock, flags);
 839                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 840         } else {
 841                 info->isdn_driver = dev->drvmap[i];
 842                 info->isdn_channel = dev->chanmap[i];
 843                 info->drv_index = i;
 844                 dev->m_idx[i] = info->line;
 845                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 846                 info->last_dir = 1;
 847 //              strcpy(info->last_num, n);
 848                 isdn_info_update();
 849                 spin_unlock_irqrestore(&dev->lock, flags);
 850                 cmd.driver = info->isdn_driver;
 851                 cmd.arg = info->isdn_channel;
 852                 cmd.command = ISDN_CMD_CLREAZ;
 853                 isdn_command(&cmd);
 854                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 855                 cmd.driver = info->isdn_driver;
 856                 cmd.command = ISDN_CMD_SETEAZ;
 857                 isdn_command(&cmd);
 858                 cmd.driver = info->isdn_driver;
 859                 cmd.command = ISDN_CMD_SETL2;
 860                 info->last_l2 = l2;
 861                 cmd.arg = info->isdn_channel + (l2 << 8);
 862                 isdn_command(&cmd);
 863                 cmd.driver = info->isdn_driver;
 864                 cmd.command = ISDN_CMD_SETL3;
 865                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 866                 isdn_command(&cmd);
 867                 cmd.driver = info->isdn_driver;
 868                 cmd.arg = info->isdn_channel;
 869                 cmd.parm.cmsg.Length = l + 18;
 870                 cmd.parm.cmsg.Command = CAPI_FACILITY;
 871                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 872                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 873                 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
 874                 cmd.parm.cmsg.para[1] = 0;
 875                 cmd.parm.cmsg.para[2] = l + 3;
 876                 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
 877                 cmd.parm.cmsg.para[4] = 0;
 878                 cmd.parm.cmsg.para[5] = l;
 879                 strncpy(&cmd.parm.cmsg.para[6], id, l);
 880                 cmd.command = CAPI_PUT_MESSAGE;
 881                 info->dialing = 1;
 882 //              strcpy(dev->num[i], n);
 883                 isdn_info_update();
 884                 isdn_command(&cmd);
 885                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
 886         }
 887 }
 888
 889 /* isdn_tty_send_msg() sends a message to a HL driver
 890  * This is used for hybrid modem cards to send AT commands to it
 891  */
 892
 893 static void
 894 isdn_tty_send_msg(modem_info *info, atemu *m, char *msg)
 895 {
 896         int usg = ISDN_USAGE_MODEM;
 897         int si = 7;
 898         int l2 = m->mdmreg[REG_L2PROT];
 899         isdn_ctrl cmd;
 900         ulong flags;
 901         int i;
 902         int j;
 903         int l;
 904
 905         l = min(strlen(msg), sizeof(cmd.parm) - sizeof(cmd.parm.cmsg)
 906                 + sizeof(cmd.parm.cmsg.para) - 2);
 907
 908         if (!l) {
 909                 isdn_tty_modem_result(RESULT_ERROR, info);
 910                 return;
 911         }
 912         for (j = 7; j >= 0; j--)
 913                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 914                         si = bit2si[j];
 915                         break;
 916                 }
 917         usg = isdn_calc_usage(si, l2);
 918 #ifdef CONFIG_ISDN_AUDIO
 919         if ((si == 1) &&
 920             (l2 != ISDN_PROTO_L2_MODEM)
 921 #ifdef CONFIG_ISDN_TTY_FAX
 922             && (l2 != ISDN_PROTO_L2_FAX)
 923 #endif
 924                 ) {
 925                 l2 = ISDN_PROTO_L2_TRANS;
 926                 usg = ISDN_USAGE_VOICE;
 927         }
 928 #endif
 929         m->mdmreg[REG_SI1I] = si2bit[si];
 930         spin_lock_irqsave(&dev->lock, flags);
 931         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 932         if (i < 0) {
 933                 spin_unlock_irqrestore(&dev->lock, flags);
 934                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 935         } else {
 936                 info->isdn_driver = dev->drvmap[i];
 937                 info->isdn_channel = dev->chanmap[i];
 938                 info->drv_index = i;
 939                 dev->m_idx[i] = info->line;
 940                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 941                 info->last_dir = 1;
 942                 isdn_info_update();
 943                 spin_unlock_irqrestore(&dev->lock, flags);
 944                 cmd.driver = info->isdn_driver;
 945                 cmd.arg = info->isdn_channel;
 946                 cmd.command = ISDN_CMD_CLREAZ;
 947                 isdn_command(&cmd);
 948                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 949                 cmd.driver = info->isdn_driver;
 950                 cmd.command = ISDN_CMD_SETEAZ;
 951                 isdn_command(&cmd);
 952                 cmd.driver = info->isdn_driver;
 953                 cmd.command = ISDN_CMD_SETL2;
 954                 info->last_l2 = l2;
 955                 cmd.arg = info->isdn_channel + (l2 << 8);
 956                 isdn_command(&cmd);
 957                 cmd.driver = info->isdn_driver;
 958                 cmd.command = ISDN_CMD_SETL3;
 959                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 960                 isdn_command(&cmd);
 961                 cmd.driver = info->isdn_driver;
 962                 cmd.arg = info->isdn_channel;
 963                 cmd.parm.cmsg.Length = l + 14;
 964                 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
 965                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 966                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 967                 cmd.parm.cmsg.para[0] = l + 1;
 968                 strncpy(&cmd.parm.cmsg.para[1], msg, l);
 969                 cmd.parm.cmsg.para[l + 1] = 0xd;
 970                 cmd.command = CAPI_PUT_MESSAGE;
 971 /*              info->dialing = 1;
 972                 strcpy(dev->num[i], n);
 973                 isdn_info_update();
 974 */
 975                 isdn_command(&cmd);
 976         }
 977 }
 978
 979 static inline int
 980 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
 981 {
 982 #ifdef MODEM_PARANOIA_CHECK
 983         if (!info) {
 984                 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
 985                        name, routine);
 986                 return 1;
 987         }
 988         if (info->magic != ISDN_ASYNC_MAGIC) {
 989                 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
 990                        name, routine);
 991                 return 1;
 992         }
 993 #endif
 994         return 0;
 995 }
 996
 997 /*
 998  * This routine is called to set the UART divisor registers to match
 999  * the specified baud rate for a serial port.
1000  */
1001 static void
1002 isdn_tty_change_speed(modem_info *info)
1003 {
1004         struct tty_port *port = &info->port;
1005         uint cflag,
1006                 cval,
1007                 quot;
1008         int i;
1009
1010         if (!port->tty)
1011                 return;
1012         cflag = port->tty->termios.c_cflag;
1013
1014         quot = i = cflag & CBAUD;
1015         if (i & CBAUDEX) {
1016                 i &= ~CBAUDEX;
1017                 if (i < 1 || i > 2)
1018                         port->tty->termios.c_cflag &= ~CBAUDEX;
1019                 else
1020                         i += 15;
1021         }
1022         if (quot) {
1023                 info->mcr |= UART_MCR_DTR;
1024                 isdn_tty_modem_ncarrier(info);
1025         } else {
1026                 info->mcr &= ~UART_MCR_DTR;
1027                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1028 #ifdef ISDN_DEBUG_MODEM_HUP
1029                         printk(KERN_DEBUG "Mhup in changespeed\n");
1030 #endif
1031                         if (info->online)
1032                                 info->ncarrier = 1;
1033                         isdn_tty_modem_reset_regs(info, 0);
1034                         isdn_tty_modem_hup(info, 1);
1035                 }
1036                 return;
1037         }
1038         /* byte size and parity */
1039         cval = cflag & (CSIZE | CSTOPB);
1040         cval >>= 4;
1041         if (cflag & PARENB)
1042                 cval |= UART_LCR_PARITY;
1043         if (!(cflag & PARODD))
1044                 cval |= UART_LCR_EPAR;
1045
1046         /* CTS flow control flag and modem status interrupts */
1047         if (cflag & CRTSCTS) {
1048                 port->flags |= ASYNC_CTS_FLOW;
1049         } else
1050                 port->flags &= ~ASYNC_CTS_FLOW;
1051         if (cflag & CLOCAL)
1052                 port->flags &= ~ASYNC_CHECK_CD;
1053         else {
1054                 port->flags |= ASYNC_CHECK_CD;
1055         }
1056 }
1057
1058 static int
1059 isdn_tty_startup(modem_info *info)
1060 {
1061         if (info->port.flags & ASYNC_INITIALIZED)
1062                 return 0;
1063         isdn_lock_drivers();
1064 #ifdef ISDN_DEBUG_MODEM_OPEN
1065         printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1066 #endif
1067         /*
1068          * Now, initialize the UART
1069          */
1070         info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1071         if (info->port.tty)
1072                 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1073         /*
1074          * and set the speed of the serial port
1075          */
1076         isdn_tty_change_speed(info);
1077
1078         info->port.flags |= ASYNC_INITIALIZED;
1079         info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1080         info->send_outstanding = 0;
1081         return 0;
1082 }
1083
1084 /*
1085  * This routine will shutdown a serial port; interrupts are disabled, and
1086  * DTR is dropped if the hangup on close termio flag is on.
1087  */
1088 static void
1089 isdn_tty_shutdown(modem_info *info)
1090 {
1091         if (!(info->port.flags & ASYNC_INITIALIZED))
1092                 return;
1093 #ifdef ISDN_DEBUG_MODEM_OPEN
1094         printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1095 #endif
1096         isdn_unlock_drivers();
1097         info->msr &= ~UART_MSR_RI;
1098         if (!info->port.tty || (info->port.tty->termios.c_cflag & HUPCL)) {
1099                 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1100                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1101                         isdn_tty_modem_reset_regs(info, 0);
1102 #ifdef ISDN_DEBUG_MODEM_HUP
1103                         printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1104 #endif
1105                         isdn_tty_modem_hup(info, 1);
1106                 }
1107         }
1108         if (info->port.tty)
1109                 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1110
1111         info->port.flags &= ~ASYNC_INITIALIZED;
1112 }
1113
1114 /* isdn_tty_write() is the main send-routine. It is called from the upper
1115  * levels within the kernel to perform sending data. Depending on the
1116  * online-flag it either directs output to the at-command-interpreter or
1117  * to the lower level. Additional tasks done here:
1118  *  - If online, check for escape-sequence (+++)
1119  *  - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1120  *  - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1121  *  - If dialing, abort dial.
1122  */
1123 static int
1124 isdn_tty_write(struct tty_struct *tty, const u_char *buf, int count)
1125 {
1126         int c;
1127         int total = 0;
1128         modem_info *info = (modem_info *) tty->driver_data;
1129         atemu *m = &info->emu;
1130
1131         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1132                 return 0;
1133         /* See isdn_tty_senddown() */
1134         atomic_inc(&info->xmit_lock);
1135         while (1) {
1136                 c = count;
1137                 if (c > info->xmit_size - info->xmit_count)
1138                         c = info->xmit_size - info->xmit_count;
1139                 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1140                         c = dev->drv[info->isdn_driver]->maxbufsize;
1141                 if (c <= 0)
1142                         break;
1143                 if ((info->online > 1)
1144 #ifdef CONFIG_ISDN_AUDIO
1145                     || (info->vonline & 3)
1146 #endif
1147                         ) {
1148 #ifdef CONFIG_ISDN_AUDIO
1149                         if (!info->vonline)
1150 #endif
1151                                 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1152                                                    &(m->pluscount),
1153                                                    &(m->lastplus));
1154                         memcpy(&info->port.xmit_buf[info->xmit_count], buf, c);
1155 #ifdef CONFIG_ISDN_AUDIO
1156                         if (info->vonline) {
1157                                 int cc = isdn_tty_handleDLEdown(info, m, c);
1158                                 if (info->vonline & 2) {
1159                                         if (!cc) {
1160                                                 /* If DLE decoding results in zero-transmit, but
1161                                                  * c originally was non-zero, do a wakeup.
1162                                                  */
1163                                                 tty_wakeup(tty);
1164                                                 info->msr |= UART_MSR_CTS;
1165                                                 info->lsr |= UART_LSR_TEMT;
1166                                         }
1167                                         info->xmit_count += cc;
1168                                 }
1169                                 if ((info->vonline & 3) == 1) {
1170                                         /* Do NOT handle Ctrl-Q or Ctrl-S
1171                                          * when in full-duplex audio mode.
1172                                          */
1173                                         if (isdn_tty_end_vrx(buf, c)) {
1174                                                 info->vonline &= ~1;
1175 #ifdef ISDN_DEBUG_MODEM_VOICE
1176                                                 printk(KERN_DEBUG
1177                                                        "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1178                                                        info->line);
1179 #endif
1180                                                 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1181                                         }
1182                                 }
1183                         } else
1184                                 if (TTY_IS_FCLASS1(info)) {
1185                                         int cc = isdn_tty_handleDLEdown(info, m, c);
1186
1187                                         if (info->vonline & 4) { /* ETX seen */
1188                                                 isdn_ctrl c;
1189
1190                                                 c.command = ISDN_CMD_FAXCMD;
1191                                                 c.driver = info->isdn_driver;
1192                                                 c.arg = info->isdn_channel;
1193                                                 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1194                                                 c.parm.aux.subcmd = ETX;
1195                                                 isdn_command(&c);
1196                                         }
1197                                         info->vonline = 0;
1198 #ifdef ISDN_DEBUG_MODEM_VOICE
1199                                         printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1200 #endif
1201                                         info->xmit_count += cc;
1202                                 } else
1203 #endif
1204                                         info->xmit_count += c;
1205                 } else {
1206                         info->msr |= UART_MSR_CTS;
1207                         info->lsr |= UART_LSR_TEMT;
1208                         if (info->dialing) {
1209                                 info->dialing = 0;
1210 #ifdef ISDN_DEBUG_MODEM_HUP
1211                                 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1212 #endif
1213                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1214                                 isdn_tty_modem_hup(info, 1);
1215                         } else
1216                                 c = isdn_tty_edit_at(buf, c, info);
1217                 }
1218                 buf += c;
1219                 count -= c;
1220                 total += c;
1221         }
1222         atomic_dec(&info->xmit_lock);
1223         if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1224                 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1225                         isdn_tty_senddown(info);
1226                         isdn_tty_tint(info);
1227                 }
1228                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1229         }
1230         return total;
1231 }
1232
1233 static int
1234 isdn_tty_write_room(struct tty_struct *tty)
1235 {
1236         modem_info *info = (modem_info *) tty->driver_data;
1237         int ret;
1238
1239         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1240                 return 0;
1241         if (!info->online)
1242                 return info->xmit_size;
1243         ret = info->xmit_size - info->xmit_count;
1244         return (ret < 0) ? 0 : ret;
1245 }
1246
1247 static int
1248 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1249 {
1250         modem_info *info = (modem_info *) tty->driver_data;
1251
1252         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1253                 return 0;
1254         if (!info->online)
1255                 return 0;
1256         return (info->xmit_count);
1257 }
1258
1259 static void
1260 isdn_tty_flush_buffer(struct tty_struct *tty)
1261 {
1262         modem_info *info;
1263
1264         if (!tty) {
1265                 return;
1266         }
1267         info = (modem_info *) tty->driver_data;
1268         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1269                 return;
1270         }
1271         isdn_tty_cleanup_xmit(info);
1272         info->xmit_count = 0;
1273         tty_wakeup(tty);
1274 }
1275
1276 static void
1277 isdn_tty_flush_chars(struct tty_struct *tty)
1278 {
1279         modem_info *info = (modem_info *) tty->driver_data;
1280
1281         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1282                 return;
1283         if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1284                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1285 }
1286
1287 /*
1288  * ------------------------------------------------------------
1289  * isdn_tty_throttle()
1290  *
1291  * This routine is called by the upper-layer tty layer to signal that
1292  * incoming characters should be throttled.
1293  * ------------------------------------------------------------
1294  */
1295 static void
1296 isdn_tty_throttle(struct tty_struct *tty)
1297 {
1298         modem_info *info = (modem_info *) tty->driver_data;
1299
1300         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1301                 return;
1302         if (I_IXOFF(tty))
1303                 info->x_char = STOP_CHAR(tty);
1304         info->mcr &= ~UART_MCR_RTS;
1305 }
1306
1307 static void
1308 isdn_tty_unthrottle(struct tty_struct *tty)
1309 {
1310         modem_info *info = (modem_info *) tty->driver_data;
1311
1312         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1313                 return;
1314         if (I_IXOFF(tty)) {
1315                 if (info->x_char)
1316                         info->x_char = 0;
1317                 else
1318                         info->x_char = START_CHAR(tty);
1319         }
1320         info->mcr |= UART_MCR_RTS;
1321 }
1322
1323 /*
1324  * ------------------------------------------------------------
1325  * isdn_tty_ioctl() and friends
1326  * ------------------------------------------------------------
1327  */
1328
1329 /*
1330  * isdn_tty_get_lsr_info - get line status register info
1331  *
1332  * Purpose: Let user call ioctl() to get info when the UART physically
1333  *          is emptied.  On bus types like RS485, the transmitter must
1334  *          release the bus after transmitting. This must be done when
1335  *          the transmit shift register is empty, not be done when the
1336  *          transmit holding register is empty.  This functionality
1337  *          allows RS485 driver to be written in user space.
1338  */
1339 static int
1340 isdn_tty_get_lsr_info(modem_info *info, uint __user *value)
1341 {
1342         u_char status;
1343         uint result;
1344
1345         status = info->lsr;
1346         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1347         return put_user(result, value);
1348 }
1349
1350
1351 static int
1352 isdn_tty_tiocmget(struct tty_struct *tty)
1353 {
1354         modem_info *info = (modem_info *) tty->driver_data;
1355         u_char control, status;
1356
1357         if (isdn_tty_paranoia_check(info, tty->name, __func__))
1358                 return -ENODEV;
1359         if (tty->flags & (1 << TTY_IO_ERROR))
1360                 return -EIO;
1361
1362         mutex_lock(&modem_info_mutex);
1363 #ifdef ISDN_DEBUG_MODEM_IOCTL
1364         printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1365 #endif
1366
1367         control = info->mcr;
1368         status = info->msr;
1369         mutex_unlock(&modem_info_mutex);
1370         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1371                 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1372                 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1373                 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1374                 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1375                 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1376 }
1377
1378 static int
1379 isdn_tty_tiocmset(struct tty_struct *tty,
1380                   unsigned int set, unsigned int clear)
1381 {
1382         modem_info *info = (modem_info *) tty->driver_data;
1383
1384         if (isdn_tty_paranoia_check(info, tty->name, __func__))
1385                 return -ENODEV;
1386         if (tty->flags & (1 << TTY_IO_ERROR))
1387                 return -EIO;
1388
1389 #ifdef ISDN_DEBUG_MODEM_IOCTL
1390         printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1391 #endif
1392
1393         mutex_lock(&modem_info_mutex);
1394         if (set & TIOCM_RTS)
1395                 info->mcr |= UART_MCR_RTS;
1396         if (set & TIOCM_DTR) {
1397                 info->mcr |= UART_MCR_DTR;
1398                 isdn_tty_modem_ncarrier(info);
1399         }
1400
1401         if (clear & TIOCM_RTS)
1402                 info->mcr &= ~UART_MCR_RTS;
1403         if (clear & TIOCM_DTR) {
1404                 info->mcr &= ~UART_MCR_DTR;
1405                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1406                         isdn_tty_modem_reset_regs(info, 0);
1407 #ifdef ISDN_DEBUG_MODEM_HUP
1408                         printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1409 #endif
1410                         if (info->online)
1411                                 info->ncarrier = 1;
1412                         isdn_tty_modem_hup(info, 1);
1413                 }
1414         }
1415         mutex_unlock(&modem_info_mutex);
1416         return 0;
1417 }
1418
1419 static int
1420 isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg)
1421 {
1422         modem_info *info = (modem_info *) tty->driver_data;
1423         int retval;
1424
1425         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1426                 return -ENODEV;
1427         if (tty->flags & (1 << TTY_IO_ERROR))
1428                 return -EIO;
1429         switch (cmd) {
1430         case TCSBRK:   /* SVID version: non-zero arg --> no break */
1431 #ifdef ISDN_DEBUG_MODEM_IOCTL
1432                 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\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 TCSBRKP:  /* support for POSIX tcsendbreak() */
1440 #ifdef ISDN_DEBUG_MODEM_IOCTL
1441                 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1442 #endif
1443                 retval = tty_check_change(tty);
1444                 if (retval)
1445                         return retval;
1446                 tty_wait_until_sent(tty, 0);
1447                 return 0;
1448         case TIOCSERGETLSR:     /* Get line status register */
1449 #ifdef ISDN_DEBUG_MODEM_IOCTL
1450                 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1451 #endif
1452                 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1453         default:
1454 #ifdef ISDN_DEBUG_MODEM_IOCTL
1455                 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1456 #endif
1457                 return -ENOIOCTLCMD;
1458         }
1459         return 0;
1460 }
1461
1462 static void
1463 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1464 {
1465         modem_info *info = (modem_info *) tty->driver_data;
1466
1467         if (!old_termios)
1468                 isdn_tty_change_speed(info);
1469         else {
1470                 if (tty->termios.c_cflag == old_termios->c_cflag &&
1471                     tty->termios.c_ispeed == old_termios->c_ispeed &&
1472                     tty->termios.c_ospeed == old_termios->c_ospeed)
1473                         return;
1474                 isdn_tty_change_speed(info);
1475         }
1476 }
1477
1478 /*
1479  * ------------------------------------------------------------
1480  * isdn_tty_open() and friends
1481  * ------------------------------------------------------------
1482  */
1483
1484 static int isdn_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1485 {
1486         modem_info *info = &dev->mdm.info[tty->index];
1487
1488         if (isdn_tty_paranoia_check(info, tty->name, __func__))
1489                 return -ENODEV;
1490
1491         tty->driver_data = info;
1492
1493         return tty_port_install(&info->port, driver, tty);
1494 }
1495
1496 /*
1497  * This routine is called whenever a serial port is opened.  It
1498  * enables interrupts for a serial port, linking in its async structure into
1499  * the IRQ chain.   It also performs the serial-specific
1500  * initialization for the tty structure.
1501  */
1502 static int
1503 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1504 {
1505         modem_info *info = tty->driver_data;
1506         struct tty_port *port = &info->port;
1507         int retval;
1508
1509 #ifdef ISDN_DEBUG_MODEM_OPEN
1510         printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1511                port->count);
1512 #endif
1513         port->count++;
1514         port->tty = tty;
1515         /*
1516          * Start up serial port
1517          */
1518         retval = isdn_tty_startup(info);
1519         if (retval) {
1520 #ifdef ISDN_DEBUG_MODEM_OPEN
1521                 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1522 #endif
1523                 return retval;
1524         }
1525         retval = tty_port_block_til_ready(port, tty, filp);
1526         if (retval) {
1527 #ifdef ISDN_DEBUG_MODEM_OPEN
1528                 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1529 #endif
1530                 return retval;
1531         }
1532 #ifdef ISDN_DEBUG_MODEM_OPEN
1533         printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1534 #endif
1535         dev->modempoll++;
1536 #ifdef ISDN_DEBUG_MODEM_OPEN
1537         printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1538 #endif
1539         return 0;
1540 }
1541
1542 static void
1543 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1544 {
1545         modem_info *info = (modem_info *) tty->driver_data;
1546         struct tty_port *port = &info->port;
1547         ulong timeout;
1548
1549         if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1550                 return;
1551         if (tty_hung_up_p(filp)) {
1552 #ifdef ISDN_DEBUG_MODEM_OPEN
1553                 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1554 #endif
1555                 return;
1556         }
1557         if ((tty->count == 1) && (port->count != 1)) {
1558                 /*
1559                  * Uh, oh.  tty->count is 1, which means that the tty
1560                  * structure will be freed.  Info->count should always
1561                  * be one in these conditions.  If it's greater than
1562                  * one, we've got real problems, since it means the
1563                  * serial port won't be shutdown.
1564                  */
1565                 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1566                        "info->count is %d\n", port->count);
1567                 port->count = 1;
1568         }
1569         if (--port->count < 0) {
1570                 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1571                        info->line, port->count);
1572                 port->count = 0;
1573         }
1574         if (port->count) {
1575 #ifdef ISDN_DEBUG_MODEM_OPEN
1576                 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1577 #endif
1578                 return;
1579         }
1580         port->flags |= ASYNC_CLOSING;
1581
1582         tty->closing = 1;
1583         /*
1584          * At this point we stop accepting input.  To do this, we
1585          * disable the receive line status interrupts, and tell the
1586          * interrupt driver to stop checking the data ready bit in the
1587          * line status register.
1588          */
1589         if (port->flags & ASYNC_INITIALIZED) {
1590                 tty_wait_until_sent_from_close(tty, 3000);      /* 30 seconds timeout */
1591                 /*
1592                  * Before we drop DTR, make sure the UART transmitter
1593                  * has completely drained; this is especially
1594                  * important if there is a transmit FIFO!
1595                  */
1596                 timeout = jiffies + HZ;
1597                 while (!(info->lsr & UART_LSR_TEMT)) {
1598                         schedule_timeout_interruptible(20);
1599                         if (time_after(jiffies, timeout))
1600                                 break;
1601                 }
1602         }
1603         dev->modempoll--;
1604         isdn_tty_shutdown(info);
1605         isdn_tty_flush_buffer(tty);
1606         tty_ldisc_flush(tty);
1607         port->tty = NULL;
1608         info->ncarrier = 0;
1609
1610         tty_port_close_end(port, tty);
1611 #ifdef ISDN_DEBUG_MODEM_OPEN
1612         printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1613 #endif
1614 }
1615
1616 /*
1617  * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1618  */
1619 static void
1620 isdn_tty_hangup(struct tty_struct *tty)
1621 {
1622         modem_info *info = (modem_info *) tty->driver_data;
1623         struct tty_port *port = &info->port;
1624
1625         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1626                 return;
1627         isdn_tty_shutdown(info);
1628         port->count = 0;
1629         port->flags &= ~ASYNC_NORMAL_ACTIVE;
1630         port->tty = NULL;
1631         wake_up_interruptible(&port->open_wait);
1632 }
1633
1634 /* This routine initializes all emulator-data.
1635  */
1636 static void
1637 isdn_tty_reset_profile(atemu *m)
1638 {
1639         m->profile[0] = 0;
1640         m->profile[1] = 0;
1641         m->profile[2] = 43;
1642         m->profile[3] = 13;
1643         m->profile[4] = 10;
1644         m->profile[5] = 8;
1645         m->profile[6] = 3;
1646         m->profile[7] = 60;
1647         m->profile[8] = 2;
1648         m->profile[9] = 6;
1649         m->profile[10] = 7;
1650         m->profile[11] = 70;
1651         m->profile[12] = 0x45;
1652         m->profile[13] = 4;
1653         m->profile[14] = ISDN_PROTO_L2_X75I;
1654         m->profile[15] = ISDN_PROTO_L3_TRANS;
1655         m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1656         m->profile[17] = ISDN_MODEM_WINSIZE;
1657         m->profile[18] = 4;
1658         m->profile[19] = 0;
1659         m->profile[20] = 0;
1660         m->profile[23] = 0;
1661         m->pmsn[0] = '\0';
1662         m->plmsn[0] = '\0';
1663 }
1664
1665 #ifdef CONFIG_ISDN_AUDIO
1666 static void
1667 isdn_tty_modem_reset_vpar(atemu *m)
1668 {
1669         m->vpar[0] = 2;         /* Voice-device            (2 = phone line) */
1670         m->vpar[1] = 0;         /* Silence detection level (0 = none      ) */
1671         m->vpar[2] = 70;        /* Silence interval        (7 sec.        ) */
1672         m->vpar[3] = 2;         /* Compression type        (1 = ADPCM-2   ) */
1673         m->vpar[4] = 0;         /* DTMF detection level    (0 = softcode  ) */
1674         m->vpar[5] = 8;         /* DTMF interval           (8 * 5 ms.     ) */
1675 }
1676 #endif
1677
1678 #ifdef CONFIG_ISDN_TTY_FAX
1679 static void
1680 isdn_tty_modem_reset_faxpar(modem_info *info)
1681 {
1682         T30_s *f = info->fax;
1683
1684         f->code = 0;
1685         f->phase = ISDN_FAX_PHASE_IDLE;
1686         f->direction = 0;
1687         f->resolution = 1;      /* fine */
1688         f->rate = 5;            /* 14400 bit/s */
1689         f->width = 0;
1690         f->length = 0;
1691         f->compression = 0;
1692         f->ecm = 0;
1693         f->binary = 0;
1694         f->scantime = 0;
1695         memset(&f->id[0], 32, FAXIDLEN - 1);
1696         f->id[FAXIDLEN - 1] = 0;
1697         f->badlin = 0;
1698         f->badmul = 0;
1699         f->bor = 0;
1700         f->nbc = 0;
1701         f->cq = 0;
1702         f->cr = 0;
1703         f->ctcrty = 0;
1704         f->minsp = 0;
1705         f->phcto = 30;
1706         f->rel = 0;
1707         memset(&f->pollid[0], 32, FAXIDLEN - 1);
1708         f->pollid[FAXIDLEN - 1] = 0;
1709 }
1710 #endif
1711
1712 static void
1713 isdn_tty_modem_reset_regs(modem_info *info, int force)
1714 {
1715         atemu *m = &info->emu;
1716         if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1717                 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1718                 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1719                 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1720                 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1721         }
1722 #ifdef CONFIG_ISDN_AUDIO
1723         isdn_tty_modem_reset_vpar(m);
1724 #endif
1725 #ifdef CONFIG_ISDN_TTY_FAX
1726         isdn_tty_modem_reset_faxpar(info);
1727 #endif
1728         m->mdmcmdl = 0;
1729 }
1730
1731 static void
1732 modem_write_profile(atemu *m)
1733 {
1734         memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1735         memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1736         memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1737         if (dev->profd)
1738                 send_sig(SIGIO, dev->profd, 1);
1739 }
1740
1741 static const struct tty_operations modem_ops = {
1742         .install = isdn_tty_install,
1743         .open = isdn_tty_open,
1744         .close = isdn_tty_close,
1745         .write = isdn_tty_write,
1746         .flush_chars = isdn_tty_flush_chars,
1747         .write_room = isdn_tty_write_room,
1748         .chars_in_buffer = isdn_tty_chars_in_buffer,
1749         .flush_buffer = isdn_tty_flush_buffer,
1750         .ioctl = isdn_tty_ioctl,
1751         .throttle = isdn_tty_throttle,
1752         .unthrottle = isdn_tty_unthrottle,
1753         .set_termios = isdn_tty_set_termios,
1754         .hangup = isdn_tty_hangup,
1755         .tiocmget = isdn_tty_tiocmget,
1756         .tiocmset = isdn_tty_tiocmset,
1757 };
1758
1759 static int isdn_tty_carrier_raised(struct tty_port *port)
1760 {
1761         modem_info *info = container_of(port, modem_info, port);
1762         return info->msr & UART_MSR_DCD;
1763 }
1764
1765 static const struct tty_port_operations isdn_tty_port_ops = {
1766         .carrier_raised = isdn_tty_carrier_raised,
1767 };
1768
1769 int
1770 isdn_tty_modem_init(void)
1771 {
1772         isdn_modem_t    *m;
1773         int             i, retval;
1774         modem_info      *info;
1775
1776         m = &dev->mdm;
1777         m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1778         if (!m->tty_modem)
1779                 return -ENOMEM;
1780         m->tty_modem->name = "ttyI";
1781         m->tty_modem->major = ISDN_TTY_MAJOR;
1782         m->tty_modem->minor_start = 0;
1783         m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1784         m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1785         m->tty_modem->init_termios = tty_std_termios;
1786         m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1787         m->tty_modem->flags = TTY_DRIVER_REAL_RAW;
1788         m->tty_modem->driver_name = "isdn_tty";
1789         tty_set_operations(m->tty_modem, &modem_ops);
1790         retval = tty_register_driver(m->tty_modem);
1791         if (retval) {
1792                 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1793                 goto err;
1794         }
1795         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1796                 info = &m->info[i];
1797 #ifdef CONFIG_ISDN_TTY_FAX
1798                 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1799                         printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1800                         retval = -ENOMEM;
1801                         goto err_unregister;
1802                 }
1803 #endif
1804                 tty_port_init(&info->port);
1805                 info->port.ops = &isdn_tty_port_ops;
1806                 spin_lock_init(&info->readlock);
1807                 sprintf(info->last_cause, "0000");
1808                 sprintf(info->last_num, "none");
1809                 info->last_dir = 0;
1810                 info->last_lhup = 1;
1811                 info->last_l2 = -1;
1812                 info->last_si = 0;
1813                 isdn_tty_reset_profile(&info->emu);
1814                 isdn_tty_modem_reset_regs(info, 1);
1815                 info->magic = ISDN_ASYNC_MAGIC;
1816                 info->line = i;
1817                 info->x_char = 0;
1818                 info->isdn_driver = -1;
1819                 info->isdn_channel = -1;
1820                 info->drv_index = -1;
1821                 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1822                 init_timer(&info->nc_timer);
1823                 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1824                 info->nc_timer.data = (unsigned long) info;
1825                 skb_queue_head_init(&info->xmit_queue);
1826 #ifdef CONFIG_ISDN_AUDIO
1827                 skb_queue_head_init(&info->dtmf_queue);
1828 #endif
1829                 info->port.xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5,
1830                                 GFP_KERNEL);
1831                 if (!info->port.xmit_buf) {
1832                         printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1833                         retval = -ENOMEM;
1834                         goto err_unregister;
1835                 }
1836                 /* Make room for T.70 header */
1837                 info->port.xmit_buf += 4;
1838         }
1839         return 0;
1840 err_unregister:
1841         for (i--; i >= 0; i--) {
1842                 info = &m->info[i];
1843 #ifdef CONFIG_ISDN_TTY_FAX
1844                 kfree(info->fax);
1845 #endif
1846                 kfree(info->port.xmit_buf - 4);
1847                 info->port.xmit_buf = NULL;
1848                 tty_port_destroy(&info->port);
1849         }
1850         tty_unregister_driver(m->tty_modem);
1851 err:
1852         put_tty_driver(m->tty_modem);
1853         m->tty_modem = NULL;
1854         return retval;
1855 }
1856
1857 void
1858 isdn_tty_exit(void)
1859 {
1860         modem_info *info;
1861         int i;
1862
1863         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1864                 info = &dev->mdm.info[i];
1865                 isdn_tty_cleanup_xmit(info);
1866 #ifdef CONFIG_ISDN_TTY_FAX
1867                 kfree(info->fax);
1868 #endif
1869                 kfree(info->port.xmit_buf - 4);
1870                 info->port.xmit_buf = NULL;
1871                 tty_port_destroy(&info->port);
1872         }
1873         tty_unregister_driver(dev->mdm.tty_modem);
1874         put_tty_driver(dev->mdm.tty_modem);
1875         dev->mdm.tty_modem = NULL;
1876 }
1877
1878
1879 /*
1880  * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1881  *      match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1882  *      and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1883  */
1884
1885 static int
1886 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1887 {
1888 #ifdef ISDN_DEBUG_MODEM_ICALL
1889         printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1890                emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1891                emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1892 #endif
1893         if (strlen(emu->lmsn)) {
1894                 char *p = emu->lmsn;
1895                 char *q;
1896                 int  tmp;
1897                 int  ret = 0;
1898
1899                 while (1) {
1900                         if ((q = strchr(p, ';')))
1901                                 *q = '\0';
1902                         if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
1903                                 ret = tmp;
1904 #ifdef ISDN_DEBUG_MODEM_ICALL
1905                         printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
1906                                p, isdn_map_eaz2msn(emu->msn, di), tmp);
1907 #endif
1908                         if (q) {
1909                                 *q = ';';
1910                                 p = q;
1911                                 p++;
1912                         }
1913                         if (!tmp)
1914                                 return 0;
1915                         if (!q)
1916                                 break;
1917                 }
1918                 return ret;
1919         } else {
1920                 int tmp;
1921                 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
1922 #ifdef ISDN_DEBUG_MODEM_ICALL
1923                 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
1924                        isdn_map_eaz2msn(emu->msn, di), tmp);
1925 #endif
1926                 return tmp;
1927         }
1928 }
1929
1930 /*
1931  * An incoming call-request has arrived.
1932  * Search the tty-devices for an appropriate device and bind
1933  * it to the ISDN-Channel.
1934  * Return:
1935  *
1936  *  0 = No matching device found.
1937  *  1 = A matching device found.
1938  *  3 = No match found, but eventually would match, if
1939  *      CID is longer.
1940  */
1941 int
1942 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
1943 {
1944         char *eaz;
1945         int i;
1946         int wret;
1947         int idx;
1948         int si1;
1949         int si2;
1950         char *nr;
1951         ulong flags;
1952
1953         if (!setup->phone[0]) {
1954                 nr = "0";
1955                 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
1956         } else
1957                 nr = setup->phone;
1958         si1 = (int) setup->si1;
1959         si2 = (int) setup->si2;
1960         if (!setup->eazmsn[0]) {
1961                 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
1962                 eaz = "0";
1963         } else
1964                 eaz = setup->eazmsn;
1965 #ifdef ISDN_DEBUG_MODEM_ICALL
1966         printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
1967 #endif
1968         wret = 0;
1969         spin_lock_irqsave(&dev->lock, flags);
1970         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1971                 modem_info *info = &dev->mdm.info[i];
1972
1973                 if (info->port.count == 0)
1974                         continue;
1975                 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) &&  /* SI1 is matching */
1976                     (info->emu.mdmreg[REG_SI2] == si2)) {         /* SI2 is matching */
1977                         idx = isdn_dc2minor(di, ch);
1978 #ifdef ISDN_DEBUG_MODEM_ICALL
1979                         printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
1980                         printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
1981                                info->port.flags, info->isdn_driver,
1982                                info->isdn_channel, dev->usage[idx]);
1983 #endif
1984                         if (
1985 #ifndef FIX_FILE_TRANSFER
1986                                 (info->port.flags & ASYNC_NORMAL_ACTIVE) &&
1987 #endif
1988                                 (info->isdn_driver == -1) &&
1989                                 (info->isdn_channel == -1) &&
1990                                 (USG_NONE(dev->usage[idx]))) {
1991                                 int matchret;
1992
1993                                 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
1994                                         wret = matchret;
1995                                 if (!matchret) {                  /* EAZ is matching */
1996                                         info->isdn_driver = di;
1997                                         info->isdn_channel = ch;
1998                                         info->drv_index = idx;
1999                                         dev->m_idx[idx] = info->line;
2000                                         dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2001                                         dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2002                                         strcpy(dev->num[idx], nr);
2003                                         strcpy(info->emu.cpn, eaz);
2004                                         info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2005                                         info->emu.mdmreg[REG_PLAN] = setup->plan;
2006                                         info->emu.mdmreg[REG_SCREEN] = setup->screen;
2007                                         isdn_info_update();
2008                                         spin_unlock_irqrestore(&dev->lock, flags);
2009                                         printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2010                                                info->line);
2011                                         info->msr |= UART_MSR_RI;
2012                                         isdn_tty_modem_result(RESULT_RING, info);
2013                                         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2014                                         return 1;
2015                                 }
2016                         }
2017                 }
2018         }
2019         spin_unlock_irqrestore(&dev->lock, flags);
2020         printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2021                ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2)) ? "rejected" : "ignored");
2022         return (wret == 2) ? 3 : 0;
2023 }
2024
2025 #define TTY_IS_ACTIVE(info)     (info->port.flags & ASYNC_NORMAL_ACTIVE)
2026
2027 int
2028 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2029 {
2030         int mi;
2031         modem_info *info;
2032         char *e;
2033
2034         if (i < 0)
2035                 return 0;
2036         if ((mi = dev->m_idx[i]) >= 0) {
2037                 info = &dev->mdm.info[mi];
2038                 switch (c->command) {
2039                 case ISDN_STAT_CINF:
2040                         printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2041                         info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2042                         if (e == (char *)c->parm.num)
2043                                 info->emu.charge = 0;
2044
2045                         break;
2046                 case ISDN_STAT_BSENT:
2047 #ifdef ISDN_TTY_STAT_DEBUG
2048                         printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2049 #endif
2050                         if ((info->isdn_driver == c->driver) &&
2051                             (info->isdn_channel == c->arg)) {
2052                                 info->msr |= UART_MSR_CTS;
2053                                 if (info->send_outstanding)
2054                                         if (!(--info->send_outstanding))
2055                                                 info->lsr |= UART_LSR_TEMT;
2056                                 isdn_tty_tint(info);
2057                                 return 1;
2058                         }
2059                         break;
2060                 case ISDN_STAT_CAUSE:
2061 #ifdef ISDN_TTY_STAT_DEBUG
2062                         printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2063 #endif
2064                         /* Signal cause to tty-device */
2065                         strncpy(info->last_cause, c->parm.num, 5);
2066                         return 1;
2067                 case ISDN_STAT_DISPLAY:
2068 #ifdef ISDN_TTY_STAT_DEBUG
2069                         printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2070 #endif
2071                         /* Signal display to tty-device */
2072                         if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2073                             !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2074                                 isdn_tty_at_cout("\r\n", info);
2075                                 isdn_tty_at_cout("DISPLAY: ", info);
2076                                 isdn_tty_at_cout(c->parm.display, info);
2077                                 isdn_tty_at_cout("\r\n", info);
2078                         }
2079                         return 1;
2080                 case ISDN_STAT_DCONN:
2081 #ifdef ISDN_TTY_STAT_DEBUG
2082                         printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2083 #endif
2084                         if (TTY_IS_ACTIVE(info)) {
2085                                 if (info->dialing == 1) {
2086                                         info->dialing = 2;
2087                                         return 1;
2088                                 }
2089                         }
2090                         break;
2091                 case ISDN_STAT_DHUP:
2092 #ifdef ISDN_TTY_STAT_DEBUG
2093                         printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2094 #endif
2095                         if (TTY_IS_ACTIVE(info)) {
2096                                 if (info->dialing == 1)
2097                                         isdn_tty_modem_result(RESULT_BUSY, info);
2098                                 if (info->dialing > 1)
2099                                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2100                                 info->dialing = 0;
2101 #ifdef ISDN_DEBUG_MODEM_HUP
2102                                 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2103 #endif
2104                                 isdn_tty_modem_hup(info, 0);
2105                                 return 1;
2106                         }
2107                         break;
2108                 case ISDN_STAT_BCONN:
2109 #ifdef ISDN_TTY_STAT_DEBUG
2110                         printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2111 #endif
2112                         /* Wake up any processes waiting
2113                          * for incoming call of this device when
2114                          * DCD follow the state of incoming carrier
2115                          */
2116                         if (info->port.blocked_open &&
2117                             (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2118                                 wake_up_interruptible(&info->port.open_wait);
2119                         }
2120
2121                         /* Schedule CONNECT-Message to any tty
2122                          * waiting for it and
2123                          * set DCD-bit of its modem-status.
2124                          */
2125                         if (TTY_IS_ACTIVE(info) ||
2126                             (info->port.blocked_open &&
2127                              (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2128                                 info->msr |= UART_MSR_DCD;
2129                                 info->emu.charge = 0;
2130                                 if (info->dialing & 0xf)
2131                                         info->last_dir = 1;
2132                                 else
2133                                         info->last_dir = 0;
2134                                 info->dialing = 0;
2135                                 info->rcvsched = 1;
2136                                 if (USG_MODEM(dev->usage[i])) {
2137                                         if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2138                                                 strcpy(info->emu.connmsg, c->parm.num);
2139                                                 isdn_tty_modem_result(RESULT_CONNECT, info);
2140                                         } else
2141                                                 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2142                                 }
2143                                 if (USG_VOICE(dev->usage[i]))
2144                                         isdn_tty_modem_result(RESULT_VCON, info);
2145                                 return 1;
2146                         }
2147                         break;
2148                 case ISDN_STAT_BHUP:
2149 #ifdef ISDN_TTY_STAT_DEBUG
2150                         printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2151 #endif
2152                         if (TTY_IS_ACTIVE(info)) {
2153 #ifdef ISDN_DEBUG_MODEM_HUP
2154                                 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2155 #endif
2156                                 isdn_tty_modem_hup(info, 0);
2157                                 return 1;
2158                         }
2159                         break;
2160                 case ISDN_STAT_NODCH:
2161 #ifdef ISDN_TTY_STAT_DEBUG
2162                         printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2163 #endif
2164                         if (TTY_IS_ACTIVE(info)) {
2165                                 if (info->dialing) {
2166                                         info->dialing = 0;
2167                                         info->last_l2 = -1;
2168                                         info->last_si = 0;
2169                                         sprintf(info->last_cause, "0000");
2170                                         isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2171                                 }
2172                                 isdn_tty_modem_hup(info, 0);
2173                                 return 1;
2174                         }
2175                         break;
2176                 case ISDN_STAT_UNLOAD:
2177 #ifdef ISDN_TTY_STAT_DEBUG
2178                         printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2179 #endif
2180                         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2181                                 info = &dev->mdm.info[i];
2182                                 if (info->isdn_driver == c->driver) {
2183                                         if (info->online)
2184                                                 isdn_tty_modem_hup(info, 1);
2185                                 }
2186                         }
2187                         return 1;
2188 #ifdef CONFIG_ISDN_TTY_FAX
2189                 case ISDN_STAT_FAXIND:
2190                         if (TTY_IS_ACTIVE(info)) {
2191                                 isdn_tty_fax_command(info, c);
2192                         }
2193                         break;
2194 #endif
2195 #ifdef CONFIG_ISDN_AUDIO
2196                 case ISDN_STAT_AUDIO:
2197                         if (TTY_IS_ACTIVE(info)) {
2198                                 switch (c->parm.num[0]) {
2199                                 case ISDN_AUDIO_DTMF:
2200                                         if (info->vonline) {
2201                                                 isdn_audio_put_dle_code(info,
2202                                                                         c->parm.num[1]);
2203                                         }
2204                                         break;
2205                                 }
2206                         }
2207                         break;
2208 #endif
2209                 }
2210         }
2211         return 0;
2212 }
2213
2214 /*********************************************************************
2215  Modem-Emulator-Routines
2216 *********************************************************************/
2217
2218 #define cmdchar(c) ((c >= ' ') && (c <= 0x7f))
2219
2220 /*
2221  * Put a message from the AT-emulator into receive-buffer of tty,
2222  * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2223  */
2224 void
2225 isdn_tty_at_cout(char *msg, modem_info *info)
2226 {
2227         struct tty_port *port = &info->port;
2228         atemu *m = &info->emu;
2229         char *p;
2230         char c;
2231         u_long flags;
2232         struct sk_buff *skb = NULL;
2233         char *sp = NULL;
2234         int l;
2235
2236         if (!msg) {
2237                 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2238                 return;
2239         }
2240
2241         l = strlen(msg);
2242
2243         spin_lock_irqsave(&info->readlock, flags);
2244         if (port->flags & ASYNC_CLOSING) {
2245                 spin_unlock_irqrestore(&info->readlock, flags);
2246                 return;
2247         }
2248
2249         /* use queue instead of direct, if online and */
2250         /* data is in queue or buffer is full */
2251         if (info->online && ((tty_buffer_request_room(port, l) < l) ||
2252                              !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2253                 skb = alloc_skb(l, GFP_ATOMIC);
2254                 if (!skb) {
2255                         spin_unlock_irqrestore(&info->readlock, flags);
2256                         return;
2257                 }
2258                 sp = skb_put(skb, l);
2259 #ifdef CONFIG_ISDN_AUDIO
2260                 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2261                 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2262 #endif
2263         }
2264
2265         for (p = msg; *p; p++) {
2266                 switch (*p) {
2267                 case '\r':
2268                         c = m->mdmreg[REG_CR];
2269                         break;
2270                 case '\n':
2271                         c = m->mdmreg[REG_LF];
2272                         break;
2273                 case '\b':
2274                         c = m->mdmreg[REG_BS];
2275                         break;
2276                 default:
2277                         c = *p;
2278                 }
2279                 if (skb) {
2280                         *sp++ = c;
2281                 } else {
2282                         if (tty_insert_flip_char(port, c, TTY_NORMAL) == 0)
2283                                 break;
2284                 }
2285         }
2286         if (skb) {
2287                 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2288                 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2289                 spin_unlock_irqrestore(&info->readlock, flags);
2290                 /* Schedule dequeuing */
2291                 if (dev->modempoll && info->rcvsched)
2292                         isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2293
2294         } else {
2295                 spin_unlock_irqrestore(&info->readlock, flags);
2296                 tty_flip_buffer_push(port);
2297         }
2298 }
2299
2300 /*
2301  * Perform ATH Hangup
2302  */
2303 static void
2304 isdn_tty_on_hook(modem_info *info)
2305 {
2306         if (info->isdn_channel >= 0) {
2307 #ifdef ISDN_DEBUG_MODEM_HUP
2308                 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2309 #endif
2310                 isdn_tty_modem_hup(info, 1);
2311         }
2312 }
2313
2314 static void
2315 isdn_tty_off_hook(void)
2316 {
2317         printk(KERN_DEBUG "isdn_tty_off_hook\n");
2318 }
2319
2320 #define PLUSWAIT1 (HZ / 2)      /* 0.5 sec. */
2321 #define PLUSWAIT2 (HZ * 3 / 2)  /* 1.5 sec */
2322
2323 /*
2324  * Check Buffer for Modem-escape-sequence, activate timer-callback to
2325  * isdn_tty_modem_escape() if sequence found.
2326  *
2327  * Parameters:
2328  *   p          pointer to databuffer
2329  *   plus       escape-character
2330  *   count      length of buffer
2331  *   pluscount  count of valid escape-characters so far
2332  *   lastplus   timestamp of last character
2333  */
2334 static void
2335 isdn_tty_check_esc(const u_char *p, u_char plus, int count, int *pluscount,
2336                    u_long *lastplus)
2337 {
2338         if (plus > 127)
2339                 return;
2340         if (count > 3) {
2341                 p += count - 3;
2342                 count = 3;
2343                 *pluscount = 0;
2344         }
2345         while (count > 0) {
2346                 if (*(p++) == plus) {
2347                         if ((*pluscount)++) {
2348                                 /* Time since last '+' > 0.5 sec. ? */
2349                                 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2350                                         *pluscount = 1;
2351                         } else {
2352                                 /* Time since last non-'+' < 1.5 sec. ? */
2353                                 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2354                                         *pluscount = 0;
2355                         }
2356                         if ((*pluscount == 3) && (count == 1))
2357                                 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2358                         if (*pluscount > 3)
2359                                 *pluscount = 1;
2360                 } else
2361                         *pluscount = 0;
2362                 *lastplus = jiffies;
2363                 count--;
2364         }
2365 }
2366
2367 /*
2368  * Return result of AT-emulator to tty-receive-buffer, depending on
2369  * modem-register 12, bit 0 and 1.
2370  * For CONNECT-messages also switch to online-mode.
2371  * For RING-message handle auto-ATA if register 0 != 0
2372  */
2373
2374 static void
2375 isdn_tty_modem_result(int code, modem_info *info)
2376 {
2377         atemu *m = &info->emu;
2378         static char *msg[] =
2379                 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2380                  "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2381                  "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2382         char s[ISDN_MSNLEN + 10];
2383
2384         switch (code) {
2385         case RESULT_RING:
2386                 m->mdmreg[REG_RINGCNT]++;
2387                 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2388                         /* Automatically accept incoming call */
2389                         isdn_tty_cmd_ATA(info);
2390                 break;
2391         case RESULT_NO_CARRIER:
2392 #ifdef ISDN_DEBUG_MODEM_HUP
2393                 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2394                        (info->port.flags & ASYNC_CLOSING),
2395                        (!info->port.tty));
2396 #endif
2397                 m->mdmreg[REG_RINGCNT] = 0;
2398                 del_timer(&info->nc_timer);
2399                 info->ncarrier = 0;
2400                 if ((info->port.flags & ASYNC_CLOSING) || (!info->port.tty))
2401                         return;
2402
2403 #ifdef CONFIG_ISDN_AUDIO
2404                 if (info->vonline & 1) {
2405 #ifdef ISDN_DEBUG_MODEM_VOICE
2406                         printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2407                                info->line);
2408 #endif
2409                         /* voice-recording, add DLE-ETX */
2410                         isdn_tty_at_cout("\020\003", info);
2411                 }
2412                 if (info->vonline & 2) {
2413 #ifdef ISDN_DEBUG_MODEM_VOICE
2414                         printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2415                                info->line);
2416 #endif
2417                         /* voice-playing, add DLE-DC4 */
2418                         isdn_tty_at_cout("\020\024", info);
2419                 }
2420 #endif
2421                 break;
2422         case RESULT_CONNECT:
2423         case RESULT_CONNECT64000:
2424                 sprintf(info->last_cause, "0000");
2425                 if (!info->online)
2426                         info->online = 2;
2427                 break;
2428         case RESULT_VCON:
2429 #ifdef ISDN_DEBUG_MODEM_VOICE
2430                 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2431                        info->line);
2432 #endif
2433                 sprintf(info->last_cause, "0000");
2434                 if (!info->online)
2435                         info->online = 1;
2436                 break;
2437         } /* switch (code) */
2438
2439         if (m->mdmreg[REG_RESP] & BIT_RESP) {
2440                 /* Show results */
2441                 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2442                         /* Show numeric results only */
2443                         sprintf(s, "\r\n%d\r\n", code);
2444                         isdn_tty_at_cout(s, info);
2445                 } else {
2446                         if (code == RESULT_RING) {
2447                                 /* return if "show RUNG" and ringcounter>1 */
2448                                 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2449                                     (m->mdmreg[REG_RINGCNT] > 1))
2450                                         return;
2451                                 /* print CID, _before_ _every_ ring */
2452                                 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2453                                         isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2454                                         isdn_tty_at_cout(dev->num[info->drv_index], info);
2455                                         if (m->mdmreg[REG_CDN] & BIT_CDN) {
2456                                                 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2457                                                 isdn_tty_at_cout(info->emu.cpn, info);
2458                                         }
2459                                 }
2460                         }
2461                         isdn_tty_at_cout("\r\n", info);
2462                         isdn_tty_at_cout(msg[code], info);
2463                         switch (code) {
2464                         case RESULT_CONNECT:
2465                                 switch (m->mdmreg[REG_L2PROT]) {
2466                                 case ISDN_PROTO_L2_MODEM:
2467                                         isdn_tty_at_cout(" ", info);
2468                                         isdn_tty_at_cout(m->connmsg, info);
2469                                         break;
2470                                 }
2471                                 break;
2472                         case RESULT_RING:
2473                                 /* Append CPN, if enabled */
2474                                 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2475                                         sprintf(s, "/%s", m->cpn);
2476                                         isdn_tty_at_cout(s, info);
2477                                 }
2478                                 /* Print CID only once, _after_ 1st RING */
2479                                 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2480                                     (m->mdmreg[REG_RINGCNT] == 1)) {
2481                                         isdn_tty_at_cout("\r\n", info);
2482                                         isdn_tty_at_cout("CALLER NUMBER: ", info);
2483                                         isdn_tty_at_cout(dev->num[info->drv_index], info);
2484                                         if (m->mdmreg[REG_CDN] & BIT_CDN) {
2485                                                 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2486                                                 isdn_tty_at_cout(info->emu.cpn, info);
2487                                         }
2488                                 }
2489                                 break;
2490                         case RESULT_NO_CARRIER:
2491                         case RESULT_NO_DIALTONE:
2492                         case RESULT_BUSY:
2493                         case RESULT_NO_ANSWER:
2494                                 m->mdmreg[REG_RINGCNT] = 0;
2495                                 /* Append Cause-Message if enabled */
2496                                 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2497                                         sprintf(s, "/%s", info->last_cause);
2498                                         isdn_tty_at_cout(s, info);
2499                                 }
2500                                 break;
2501                         case RESULT_CONNECT64000:
2502                                 /* Append Protocol to CONNECT message */
2503                                 switch (m->mdmreg[REG_L2PROT]) {
2504                                 case ISDN_PROTO_L2_X75I:
2505                                 case ISDN_PROTO_L2_X75UI:
2506                                 case ISDN_PROTO_L2_X75BUI:
2507                                         isdn_tty_at_cout("/X.75", info);
2508                                         break;
2509                                 case ISDN_PROTO_L2_HDLC:
2510                                         isdn_tty_at_cout("/HDLC", info);
2511                                         break;
2512                                 case ISDN_PROTO_L2_V11096:
2513                                         isdn_tty_at_cout("/V110/9600", info);
2514                                         break;
2515                                 case ISDN_PROTO_L2_V11019:
2516                                         isdn_tty_at_cout("/V110/19200", info);
2517                                         break;
2518                                 case ISDN_PROTO_L2_V11038:
2519                                         isdn_tty_at_cout("/V110/38400", info);
2520                                         break;
2521                                 }
2522                                 if (m->mdmreg[REG_T70] & BIT_T70) {
2523                                         isdn_tty_at_cout("/T.70", info);
2524                                         if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2525                                                 isdn_tty_at_cout("+", info);
2526                                 }
2527                                 break;
2528                         }
2529                         isdn_tty_at_cout("\r\n", info);
2530                 }
2531         }
2532         if (code == RESULT_NO_CARRIER) {
2533                 if ((info->port.flags & ASYNC_CLOSING) || (!info->port.tty))
2534                         return;
2535
2536                 if (info->port.flags & ASYNC_CHECK_CD)
2537                         tty_hangup(info->port.tty);
2538         }
2539 }
2540
2541
2542 /*
2543  * Display a modem-register-value.
2544  */
2545 static void
2546 isdn_tty_show_profile(int ridx, modem_info *info)
2547 {
2548         char v[6];
2549
2550         sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2551         isdn_tty_at_cout(v, info);
2552 }
2553
2554 /*
2555  * Get MSN-string from char-pointer, set pointer to end of number
2556  */
2557 static void
2558 isdn_tty_get_msnstr(char *n, char **p)
2559 {
2560         int limit = ISDN_MSNLEN - 1;
2561
2562         while (((*p[0] >= '0' && *p[0] <= '9') ||
2563                 /* Why a comma ??? */
2564                 (*p[0] == ',') || (*p[0] == ':')) &&
2565                (limit--))
2566                 *n++ = *p[0]++;
2567         *n = '\0';
2568 }
2569
2570 /*
2571  * Get phone-number from modem-commandbuffer
2572  */
2573 static void
2574 isdn_tty_getdial(char *p, char *q, int cnt)
2575 {
2576         int first = 1;
2577         int limit = ISDN_MSNLEN - 1;    /* MUST match the size of interface var to avoid
2578                                            buffer overflow */
2579
2580         while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt > 0) {
2581                 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2582                     ((*p == 'R') && first) ||
2583                     (*p == '*') || (*p == '#')) {
2584                         *q++ = *p;
2585                         limit--;
2586                 }
2587                 if (!limit)
2588                         break;
2589                 p++;
2590                 first = 0;
2591         }
2592         *q = 0;
2593 }
2594
2595 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2596 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2597
2598 static void
2599 isdn_tty_report(modem_info *info)
2600 {
2601         atemu *m = &info->emu;
2602         char s[80];
2603
2604         isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2605         sprintf(s, "    Remote Number:    %s\r\n", info->last_num);
2606         isdn_tty_at_cout(s, info);
2607         sprintf(s, "    Direction:        %s\r\n", info->last_dir ? "outgoing" : "incoming");
2608         isdn_tty_at_cout(s, info);
2609         isdn_tty_at_cout("    Layer-2 Protocol: ", info);
2610         switch (info->last_l2) {
2611         case ISDN_PROTO_L2_X75I:
2612                 isdn_tty_at_cout("X.75i", info);
2613                 break;
2614         case ISDN_PROTO_L2_X75UI:
2615                 isdn_tty_at_cout("X.75ui", info);
2616                 break;
2617         case ISDN_PROTO_L2_X75BUI:
2618                 isdn_tty_at_cout("X.75bui", info);
2619                 break;
2620         case ISDN_PROTO_L2_HDLC:
2621                 isdn_tty_at_cout("HDLC", info);
2622                 break;
2623         case ISDN_PROTO_L2_V11096:
2624                 isdn_tty_at_cout("V.110 9600 Baud", info);
2625                 break;
2626         case ISDN_PROTO_L2_V11019:
2627                 isdn_tty_at_cout("V.110 19200 Baud", info);
2628                 break;
2629         case ISDN_PROTO_L2_V11038:
2630                 isdn_tty_at_cout("V.110 38400 Baud", info);
2631                 break;
2632         case ISDN_PROTO_L2_TRANS:
2633                 isdn_tty_at_cout("transparent", info);
2634                 break;
2635         case ISDN_PROTO_L2_MODEM:
2636                 isdn_tty_at_cout("modem", info);
2637                 break;
2638         case ISDN_PROTO_L2_FAX:
2639                 isdn_tty_at_cout("fax", info);
2640                 break;
2641         default:
2642                 isdn_tty_at_cout("unknown", info);
2643                 break;
2644         }
2645         if (m->mdmreg[REG_T70] & BIT_T70) {
2646                 isdn_tty_at_cout("/T.70", info);
2647                 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2648                         isdn_tty_at_cout("+", info);
2649         }
2650         isdn_tty_at_cout("\r\n", info);
2651         isdn_tty_at_cout("    Service:          ", info);
2652         switch (info->last_si) {
2653         case 1:
2654                 isdn_tty_at_cout("audio\r\n", info);
2655                 break;
2656         case 5:
2657                 isdn_tty_at_cout("btx\r\n", info);
2658                 break;
2659         case 7:
2660                 isdn_tty_at_cout("data\r\n", info);
2661                 break;
2662         default:
2663                 sprintf(s, "%d\r\n", info->last_si);
2664                 isdn_tty_at_cout(s, info);
2665                 break;
2666         }
2667         sprintf(s, "    Hangup location:  %s\r\n", info->last_lhup ? "local" : "remote");
2668         isdn_tty_at_cout(s, info);
2669         sprintf(s, "    Last cause:       %s\r\n", info->last_cause);
2670         isdn_tty_at_cout(s, info);
2671 }
2672
2673 /*
2674  * Parse AT&.. commands.
2675  */
2676 static int
2677 isdn_tty_cmd_ATand(char **p, modem_info *info)
2678 {
2679         atemu *m = &info->emu;
2680         int i;
2681         char rb[100];
2682
2683 #define MAXRB (sizeof(rb) - 1)
2684
2685         switch (*p[0]) {
2686         case 'B':
2687                 /* &B - Set Buffersize */
2688                 p[0]++;
2689                 i = isdn_getnum(p);
2690                 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2691                         PARSE_ERROR1;
2692 #ifdef CONFIG_ISDN_AUDIO
2693                 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2694                         PARSE_ERROR1;
2695 #endif
2696                 m->mdmreg[REG_PSIZE] = i / 16;
2697                 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2698                 switch (m->mdmreg[REG_L2PROT]) {
2699                 case ISDN_PROTO_L2_V11096:
2700                 case ISDN_PROTO_L2_V11019:
2701                 case ISDN_PROTO_L2_V11038:
2702                         info->xmit_size /= 10;
2703                 }
2704                 break;
2705         case 'C':
2706                 /* &C - DCD Status */
2707                 p[0]++;
2708                 switch (isdn_getnum(p)) {
2709                 case 0:
2710                         m->mdmreg[REG_DCD] &= ~BIT_DCD;
2711                         break;
2712                 case 1:
2713                         m->mdmreg[REG_DCD] |= BIT_DCD;
2714                         break;
2715                 default:
2716                         PARSE_ERROR1
2717                                 }
2718                 break;
2719         case 'D':
2720                 /* &D - Set DTR-Low-behavior */
2721                 p[0]++;
2722                 switch (isdn_getnum(p)) {
2723                 case 0:
2724                         m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2725                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2726                         break;
2727                 case 2:
2728                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2729                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2730                         break;
2731                 case 3:
2732                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2733                         m->mdmreg[REG_DTRR] |= BIT_DTRR;
2734                         break;
2735                 default:
2736                         PARSE_ERROR1
2737                                 }
2738                 break;
2739         case 'E':
2740                 /* &E -Set EAZ/MSN */
2741                 p[0]++;
2742                 isdn_tty_get_msnstr(m->msn, p);
2743                 break;
2744         case 'F':
2745                 /* &F -Set Factory-Defaults */
2746                 p[0]++;
2747                 if (info->msr & UART_MSR_DCD)
2748                         PARSE_ERROR1;
2749                 isdn_tty_reset_profile(m);
2750                 isdn_tty_modem_reset_regs(info, 1);
2751                 break;
2752 #ifdef DUMMY_HAYES_AT
2753         case 'K':
2754                 /* only for be compilant with common scripts */
2755                 /* &K Flowcontrol - no function */
2756                 p[0]++;
2757                 isdn_getnum(p);
2758                 break;
2759 #endif
2760         case 'L':
2761                 /* &L -Set Numbers to listen on */
2762                 p[0]++;
2763                 i = 0;
2764                 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2765                        (i < ISDN_LMSNLEN - 1))
2766                         m->lmsn[i++] = *p[0]++;
2767                 m->lmsn[i] = '\0';
2768                 break;
2769         case 'R':
2770                 /* &R - Set V.110 bitrate adaption */
2771                 p[0]++;
2772                 i = isdn_getnum(p);
2773                 switch (i) {
2774                 case 0:
2775                         /* Switch off V.110, back to X.75 */
2776                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2777                         m->mdmreg[REG_SI2] = 0;
2778                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2779                         break;
2780                 case 9600:
2781                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2782                         m->mdmreg[REG_SI2] = 197;
2783                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2784                         break;
2785                 case 19200:
2786                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2787                         m->mdmreg[REG_SI2] = 199;
2788                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2789                         break;
2790                 case 38400:
2791                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2792                         m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2793                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2794                         break;
2795                 default:
2796                         PARSE_ERROR1;
2797                 }
2798                 /* Switch off T.70 */
2799                 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2800                 /* Set Service 7 */
2801                 m->mdmreg[REG_SI1] |= 4;
2802                 break;
2803         case 'S':
2804                 /* &S - Set Windowsize */
2805                 p[0]++;
2806                 i = isdn_getnum(p);
2807                 if ((i > 0) && (i < 9))
2808                         m->mdmreg[REG_WSIZE] = i;
2809                 else
2810                         PARSE_ERROR1;
2811                 break;
2812         case 'V':
2813                 /* &V - Show registers */
2814                 p[0]++;
2815                 isdn_tty_at_cout("\r\n", info);
2816                 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2817                         sprintf(rb, "S%02d=%03d%s", i,
2818                                 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2819                         isdn_tty_at_cout(rb, info);
2820                 }
2821                 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2822                         strlen(m->msn) ? m->msn : "None");
2823                 isdn_tty_at_cout(rb, info);
2824                 if (strlen(m->lmsn)) {
2825                         isdn_tty_at_cout("\r\nListen: ", info);
2826                         isdn_tty_at_cout(m->lmsn, info);
2827                         isdn_tty_at_cout("\r\n", info);
2828                 }
2829                 break;
2830         case 'W':
2831                 /* &W - Write Profile */
2832                 p[0]++;
2833                 switch (*p[0]) {
2834                 case '0':
2835                         p[0]++;
2836                         modem_write_profile(m);
2837                         break;
2838                 default:
2839                         PARSE_ERROR1;
2840                 }
2841                 break;
2842         case 'X':
2843                 /* &X - Switch to BTX-Mode and T.70 */
2844                 p[0]++;
2845                 switch (isdn_getnum(p)) {
2846                 case 0:
2847                         m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2848                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2849                         break;
2850                 case 1:
2851                         m->mdmreg[REG_T70] |= BIT_T70;
2852                         m->mdmreg[REG_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                 case 2:
2859                         m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2860                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2861                         info->xmit_size = 112;
2862                         m->mdmreg[REG_SI1] = 4;
2863                         m->mdmreg[REG_SI2] = 0;
2864                         break;
2865                 default:
2866                         PARSE_ERROR1;
2867                 }
2868                 break;
2869         default:
2870                 PARSE_ERROR1;
2871         }
2872         return 0;
2873 }
2874
2875 static int
2876 isdn_tty_check_ats(int mreg, int mval, modem_info *info, atemu *m)
2877 {
2878         /* Some plausibility checks */
2879         switch (mreg) {
2880         case REG_L2PROT:
2881                 if (mval > ISDN_PROTO_L2_MAX)
2882                         return 1;
2883                 break;
2884         case REG_PSIZE:
2885                 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2886                         return 1;
2887 #ifdef CONFIG_ISDN_AUDIO
2888                 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
2889                         return 1;
2890 #endif
2891                 info->xmit_size = mval * 16;
2892                 switch (m->mdmreg[REG_L2PROT]) {
2893                 case ISDN_PROTO_L2_V11096:
2894                 case ISDN_PROTO_L2_V11019:
2895                 case ISDN_PROTO_L2_V11038:
2896                         info->xmit_size /= 10;
2897                 }
2898                 break;
2899         case REG_SI1I:
2900         case REG_PLAN:
2901         case REG_SCREEN:
2902                 /* readonly registers */
2903                 return 1;
2904         }
2905         return 0;
2906 }
2907
2908 /*
2909  * Perform ATS command
2910  */
2911 static int
2912 isdn_tty_cmd_ATS(char **p, modem_info *info)
2913 {
2914         atemu *m = &info->emu;
2915         int bitpos;
2916         int mreg;
2917         int mval;
2918         int bval;
2919
2920         mreg = isdn_getnum(p);
2921         if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
2922                 PARSE_ERROR1;
2923         switch (*p[0]) {
2924         case '=':
2925                 p[0]++;
2926                 mval = isdn_getnum(p);
2927                 if (mval < 0 || mval > 255)
2928                         PARSE_ERROR1;
2929                 if (isdn_tty_check_ats(mreg, mval, info, m))
2930                         PARSE_ERROR1;
2931                 m->mdmreg[mreg] = mval;
2932                 break;
2933         case '.':
2934                 /* Set/Clear a single bit */
2935                 p[0]++;
2936                 bitpos = isdn_getnum(p);
2937                 if ((bitpos < 0) || (bitpos > 7))
2938                         PARSE_ERROR1;
2939                 switch (*p[0]) {
2940                 case '=':
2941                         p[0]++;
2942                         bval = isdn_getnum(p);
2943                         if (bval < 0 || bval > 1)
2944                                 PARSE_ERROR1;
2945                         if (bval)
2946                                 mval = m->mdmreg[mreg] | (1 << bitpos);
2947                         else
2948                                 mval = m->mdmreg[mreg] & ~(1 << bitpos);
2949                         if (isdn_tty_check_ats(mreg, mval, info, m))
2950                                 PARSE_ERROR1;
2951                         m->mdmreg[mreg] = mval;
2952                         break;
2953                 case '?':
2954                         p[0]++;
2955                         isdn_tty_at_cout("\r\n", info);
2956                         isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
2957                                          info);
2958                         break;
2959                 default:
2960                         PARSE_ERROR1;
2961                 }
2962                 break;
2963         case '?':
2964                 p[0]++;
2965                 isdn_tty_show_profile(mreg, info);
2966                 break;
2967         default:
2968                 PARSE_ERROR1;
2969                 break;
2970         }
2971         return 0;
2972 }
2973
2974 /*
2975  * Perform ATA command
2976  */
2977 static void
2978 isdn_tty_cmd_ATA(modem_info *info)
2979 {
2980         atemu *m = &info->emu;
2981         isdn_ctrl cmd;
2982         int l2;
2983
2984         if (info->msr & UART_MSR_RI) {
2985                 /* Accept incoming call */
2986                 info->last_dir = 0;
2987                 strcpy(info->last_num, dev->num[info->drv_index]);
2988                 m->mdmreg[REG_RINGCNT] = 0;
2989                 info->msr &= ~UART_MSR_RI;
2990                 l2 = m->mdmreg[REG_L2PROT];
2991 #ifdef CONFIG_ISDN_AUDIO
2992                 /* If more than one bit set in reg18, autoselect Layer2 */
2993                 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
2994                         if (m->mdmreg[REG_SI1I] == 1) {
2995                                 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
2996                                         l2 = ISDN_PROTO_L2_TRANS;
2997                         } else
2998                                 l2 = ISDN_PROTO_L2_X75I;
2999                 }
3000 #endif
3001                 cmd.driver = info->isdn_driver;
3002                 cmd.command = ISDN_CMD_SETL2;
3003                 cmd.arg = info->isdn_channel + (l2 << 8);
3004                 info->last_l2 = l2;
3005                 isdn_command(&cmd);
3006                 cmd.driver = info->isdn_driver;
3007                 cmd.command = ISDN_CMD_SETL3;
3008                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3009 #ifdef CONFIG_ISDN_TTY_FAX
3010                 if (l2 == ISDN_PROTO_L2_FAX) {
3011                         cmd.parm.fax = info->fax;
3012                         info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3013                 }
3014 #endif
3015                 isdn_command(&cmd);
3016                 cmd.driver = info->isdn_driver;
3017                 cmd.arg = info->isdn_channel;
3018                 cmd.command = ISDN_CMD_ACCEPTD;
3019                 info->dialing = 16;
3020                 info->emu.carrierwait = 0;
3021                 isdn_command(&cmd);
3022                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3023         } else
3024                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3025 }
3026
3027 #ifdef CONFIG_ISDN_AUDIO
3028 /*
3029  * Parse AT+F.. commands
3030  */
3031 static int
3032 isdn_tty_cmd_PLUSF(char **p, modem_info *info)
3033 {
3034         atemu *m = &info->emu;
3035         char rs[20];
3036
3037         if (!strncmp(p[0], "CLASS", 5)) {
3038                 p[0] += 5;
3039                 switch (*p[0]) {
3040                 case '?':
3041                         p[0]++;
3042                         sprintf(rs, "\r\n%d",
3043                                 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3044 #ifdef CONFIG_ISDN_TTY_FAX
3045                         if (TTY_IS_FCLASS2(info))
3046                                 sprintf(rs, "\r\n2");
3047                         else if (TTY_IS_FCLASS1(info))
3048                                 sprintf(rs, "\r\n1");
3049 #endif
3050                         isdn_tty_at_cout(rs, info);
3051                         break;
3052                 case '=':
3053                         p[0]++;
3054                         switch (*p[0]) {
3055                         case '0':
3056                                 p[0]++;
3057                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3058                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3059                                 m->mdmreg[REG_SI1] = 4;
3060                                 info->xmit_size =
3061                                         m->mdmreg[REG_PSIZE] * 16;
3062                                 break;
3063 #ifdef CONFIG_ISDN_TTY_FAX
3064                         case '1':
3065                                 p[0]++;
3066                                 if (!(dev->global_features &
3067                                       ISDN_FEATURE_L3_FCLASS1))
3068                                         PARSE_ERROR1;
3069                                 m->mdmreg[REG_SI1] = 1;
3070                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3071                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3072                                 info->xmit_size =
3073                                         m->mdmreg[REG_PSIZE] * 16;
3074                                 break;
3075                         case '2':
3076                                 p[0]++;
3077                                 if (!(dev->global_features &
3078                                       ISDN_FEATURE_L3_FCLASS2))
3079                                         PARSE_ERROR1;
3080                                 m->mdmreg[REG_SI1] = 1;
3081                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3082                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3083                                 info->xmit_size =
3084                                         m->mdmreg[REG_PSIZE] * 16;
3085                                 break;
3086 #endif
3087                         case '8':
3088                                 p[0]++;
3089                                 /* L2 will change on dialout with si=1 */
3090                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3091                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3092                                 m->mdmreg[REG_SI1] = 5;
3093                                 info->xmit_size = VBUF;
3094                                 break;
3095                         case '?':
3096                                 p[0]++;
3097                                 strcpy(rs, "\r\n0,");
3098 #ifdef CONFIG_ISDN_TTY_FAX
3099                                 if (dev->global_features &
3100                                     ISDN_FEATURE_L3_FCLASS1)
3101                                         strcat(rs, "1,");
3102                                 if (dev->global_features &
3103                                     ISDN_FEATURE_L3_FCLASS2)
3104                                         strcat(rs, "2,");
3105 #endif
3106                                 strcat(rs, "8");
3107                                 isdn_tty_at_cout(rs, info);
3108                                 break;
3109                         default:
3110                                 PARSE_ERROR1;
3111                         }
3112                         break;
3113                 default:
3114                         PARSE_ERROR1;
3115                 }
3116                 return 0;
3117         }
3118 #ifdef CONFIG_ISDN_TTY_FAX
3119         return (isdn_tty_cmd_PLUSF_FAX(p, info));
3120 #else
3121         PARSE_ERROR1;
3122 #endif
3123 }
3124
3125 /*
3126  * Parse AT+V.. commands
3127  */
3128 static int
3129 isdn_tty_cmd_PLUSV(char **p, modem_info *info)
3130 {
3131         atemu *m = &info->emu;
3132         isdn_ctrl cmd;
3133         static char *vcmd[] =
3134                 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3135         int i;
3136         int par1;
3137         int par2;
3138         char rs[20];
3139
3140         i = 0;
3141         while (vcmd[i]) {
3142                 if (!strncmp(vcmd[i], p[0], 2)) {
3143                         p[0] += 2;
3144                         break;
3145                 }
3146                 i++;
3147         }
3148         switch (i) {
3149         case 0:
3150                 /* AT+VNH - Auto hangup feature */
3151                 switch (*p[0]) {
3152                 case '?':
3153                         p[0]++;
3154                         isdn_tty_at_cout("\r\n1", info);
3155                         break;
3156                 case '=':
3157                         p[0]++;
3158                         switch (*p[0]) {
3159                         case '1':
3160                                 p[0]++;
3161                                 break;
3162                         case '?':
3163                                 p[0]++;
3164                                 isdn_tty_at_cout("\r\n1", info);
3165                                 break;
3166                         default:
3167                                 PARSE_ERROR1;
3168                         }
3169                         break;
3170                 default:
3171                         PARSE_ERROR1;
3172                 }
3173                 break;
3174         case 1:
3175                 /* AT+VIP - Reset all voice parameters */
3176                 isdn_tty_modem_reset_vpar(m);
3177                 break;
3178         case 2:
3179                 /* AT+VLS - Select device, accept incoming call */
3180                 switch (*p[0]) {
3181                 case '?':
3182                         p[0]++;
3183                         sprintf(rs, "\r\n%d", m->vpar[0]);
3184                         isdn_tty_at_cout(rs, info);
3185                         break;
3186                 case '=':
3187                         p[0]++;
3188                         switch (*p[0]) {
3189                         case '0':
3190                                 p[0]++;
3191                                 m->vpar[0] = 0;
3192                                 break;
3193                         case '2':
3194                                 p[0]++;
3195                                 m->vpar[0] = 2;
3196                                 break;
3197                         case '?':
3198                                 p[0]++;
3199                                 isdn_tty_at_cout("\r\n0,2", info);
3200                                 break;
3201                         default:
3202                                 PARSE_ERROR1;
3203                         }
3204                         break;
3205                 default:
3206                         PARSE_ERROR1;
3207                 }
3208                 break;
3209         case 3:
3210                 /* AT+VRX - Start recording */
3211                 if (!m->vpar[0])
3212                         PARSE_ERROR1;
3213                 if (info->online != 1) {
3214                         isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3215                         return 1;
3216                 }
3217                 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3218                 if (!info->dtmf_state) {
3219                         printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3220                         PARSE_ERROR1;
3221                 }
3222                 info->silence_state = isdn_audio_silence_init(info->silence_state);
3223                 if (!info->silence_state) {
3224                         printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3225                         PARSE_ERROR1;
3226                 }
3227                 if (m->vpar[3] < 5) {
3228                         info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3229                         if (!info->adpcmr) {
3230                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3231                                 PARSE_ERROR1;
3232                         }
3233                 }
3234 #ifdef ISDN_DEBUG_AT
3235                 printk(KERN_DEBUG "AT: +VRX\n");
3236 #endif
3237                 info->vonline |= 1;
3238                 isdn_tty_modem_result(RESULT_CONNECT, info);
3239                 return 0;
3240                 break;
3241         case 4:
3242                 /* AT+VSD - Silence detection */
3243                 switch (*p[0]) {
3244                 case '?':
3245                         p[0]++;
3246                         sprintf(rs, "\r\n<%d>,<%d>",
3247                                 m->vpar[1],
3248                                 m->vpar[2]);
3249                         isdn_tty_at_cout(rs, info);
3250                         break;
3251                 case '=':
3252                         p[0]++;
3253                         if ((*p[0] >= '0') && (*p[0] <= '9')) {
3254                                 par1 = isdn_getnum(p);
3255                                 if ((par1 < 0) || (par1 > 31))
3256                                         PARSE_ERROR1;
3257                                 if (*p[0] != ',')
3258                                         PARSE_ERROR1;
3259                                 p[0]++;
3260                                 par2 = isdn_getnum(p);
3261                                 if ((par2 < 0) || (par2 > 255))
3262                                         PARSE_ERROR1;
3263                                 m->vpar[1] = par1;
3264                                 m->vpar[2] = par2;
3265                                 break;
3266                         } else
3267                                 if (*p[0] == '?') {
3268                                         p[0]++;
3269                                         isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3270                                                          info);
3271                                         break;
3272                                 } else
3273                                         PARSE_ERROR1;
3274                         break;
3275                 default:
3276                         PARSE_ERROR1;
3277                 }
3278                 break;
3279         case 5:
3280                 /* AT+VSM - Select compression */
3281                 switch (*p[0]) {
3282                 case '?':
3283                         p[0]++;
3284                         sprintf(rs, "\r\n<%d>,<%d><8000>",
3285                                 m->vpar[3],
3286                                 m->vpar[1]);
3287                         isdn_tty_at_cout(rs, info);
3288                         break;
3289                 case '=':
3290                         p[0]++;
3291                         switch (*p[0]) {
3292                         case '2':
3293                         case '3':
3294                         case '4':
3295                         case '5':
3296                         case '6':
3297                                 par1 = isdn_getnum(p);
3298                                 if ((par1 < 2) || (par1 > 6))
3299                                         PARSE_ERROR1;
3300                                 m->vpar[3] = par1;
3301                                 break;
3302                         case '?':
3303                                 p[0]++;
3304                                 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3305                                                  info);
3306                                 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3307                                                  info);
3308                                 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3309                                                  info);
3310                                 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3311                                                  info);
3312                                 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3313                                                  info);
3314                                 break;
3315                         default:
3316                                 PARSE_ERROR1;
3317                         }
3318                         break;
3319                 default:
3320                         PARSE_ERROR1;
3321                 }
3322                 break;
3323         case 6:
3324                 /* AT+VTX - Start sending */
3325                 if (!m->vpar[0])
3326                         PARSE_ERROR1;
3327                 if (info->online != 1) {
3328                         isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3329                         return 1;
3330                 }
3331                 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3332                 if (!info->dtmf_state) {
3333                         printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3334                         PARSE_ERROR1;
3335                 }
3336                 if (m->vpar[3] < 5) {
3337                         info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3338                         if (!info->adpcms) {
3339                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3340                                 PARSE_ERROR1;
3341                         }
3342                 }
3343 #ifdef ISDN_DEBUG_AT
3344                 printk(KERN_DEBUG "AT: +VTX\n");
3345 #endif
3346                 m->lastDLE = 0;
3347                 info->vonline |= 2;
3348                 isdn_tty_modem_result(RESULT_CONNECT, info);
3349                 return 0;
3350                 break;
3351         case 7:
3352                 /* AT+VDD - DTMF detection */
3353                 switch (*p[0]) {
3354                 case '?':
3355                         p[0]++;
3356                         sprintf(rs, "\r\n<%d>,<%d>",
3357                                 m->vpar[4],
3358                                 m->vpar[5]);
3359                         isdn_tty_at_cout(rs, info);
3360                         break;
3361                 case '=':
3362                         p[0]++;
3363                         if ((*p[0] >= '0') && (*p[0] <= '9')) {
3364                                 if (info->online != 1)
3365                                         PARSE_ERROR1;
3366                                 par1 = isdn_getnum(p);
3367                                 if ((par1 < 0) || (par1 > 15))
3368                                         PARSE_ERROR1;
3369                                 if (*p[0] != ',')
3370                                         PARSE_ERROR1;
3371                                 p[0]++;
3372                                 par2 = isdn_getnum(p);
3373                                 if ((par2 < 0) || (par2 > 255))
3374                                         PARSE_ERROR1;
3375                                 m->vpar[4] = par1;
3376                                 m->vpar[5] = par2;
3377                                 cmd.driver = info->isdn_driver;
3378                                 cmd.command = ISDN_CMD_AUDIO;
3379                                 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3380                                 cmd.parm.num[0] = par1;
3381                                 cmd.parm.num[1] = par2;
3382                                 isdn_command(&cmd);
3383                                 break;
3384                         } else
3385                                 if (*p[0] == '?') {
3386                                         p[0]++;
3387                                         isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3388                                                          info);
3389                                         break;
3390                                 } else
3391                                         PARSE_ERROR1;
3392                         break;
3393                 default:
3394                         PARSE_ERROR1;
3395                 }
3396                 break;
3397         default:
3398                 PARSE_ERROR1;
3399         }
3400         return 0;
3401 }
3402 #endif                          /* CONFIG_ISDN_AUDIO */
3403
3404 /*
3405  * Parse and perform an AT-command-line.
3406  */
3407 static void
3408 isdn_tty_parse_at(modem_info *info)
3409 {
3410         atemu *m = &info->emu;
3411         char *p;
3412         char ds[ISDN_MSNLEN];
3413
3414 #ifdef ISDN_DEBUG_AT
3415         printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3416 #endif
3417         for (p = &m->mdmcmd[2]; *p;) {
3418                 switch (*p) {
3419                 case ' ':
3420                         p++;
3421                         break;
3422                 case 'A':
3423                         /* A - Accept incoming call */
3424                         p++;
3425                         isdn_tty_cmd_ATA(info);
3426                         return;
3427                 case 'D':
3428                         /* D - Dial */
3429                         if (info->msr & UART_MSR_DCD)
3430                                 PARSE_ERROR;
3431                         if (info->msr & UART_MSR_RI) {
3432                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3433                                 return;
3434                         }
3435                         isdn_tty_getdial(++p, ds, sizeof ds);
3436                         p += strlen(p);
3437                         if (!strlen(m->msn))
3438                                 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3439                         else if (strlen(ds))
3440                                 isdn_tty_dial(ds, info, m);
3441                         else
3442                                 PARSE_ERROR;
3443                         return;
3444                 case 'E':
3445                         /* E - Turn Echo on/off */
3446                         p++;
3447                         switch (isdn_getnum(&p)) {
3448                         case 0:
3449                                 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3450                                 break;
3451                         case 1:
3452                                 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3453                                 break;
3454                         default:
3455                                 PARSE_ERROR;
3456                         }
3457                         break;
3458                 case 'H':
3459                         /* H - On/Off-hook */
3460                         p++;
3461                         switch (*p) {
3462                         case '0':
3463                                 p++;
3464                                 isdn_tty_on_hook(info);
3465                                 break;
3466                         case '1':
3467                                 p++;
3468                                 isdn_tty_off_hook();
3469                                 break;
3470                         default:
3471                                 isdn_tty_on_hook(info);
3472                                 break;
3473                         }
3474                         break;
3475                 case 'I':
3476                         /* I - Information */
3477                         p++;
3478                         isdn_tty_at_cout("\r\nLinux ISDN", info);
3479                         switch (*p) {
3480                         case '0':
3481                         case '1':
3482                                 p++;
3483                                 break;
3484                         case '2':
3485                                 p++;
3486                                 isdn_tty_report(info);
3487                                 break;
3488                         case '3':
3489                                 p++;
3490                                 snprintf(ds, sizeof(ds), "\r\n%d", info->emu.charge);
3491                                 isdn_tty_at_cout(ds, info);
3492                                 break;
3493                         default:;
3494                         }
3495                         break;
3496 #ifdef DUMMY_HAYES_AT
3497                 case 'L':
3498                 case 'M':
3499                         /* only for be compilant with common scripts */
3500                         /* no function */
3501                         p++;
3502                         isdn_getnum(&p);
3503                         break;
3504 #endif
3505                 case 'O':
3506                         /* O - Go online */
3507                         p++;
3508                         if (info->msr & UART_MSR_DCD)
3509                                 /* if B-Channel is up */
3510                                 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT : RESULT_CONNECT64000, info);
3511                         else
3512                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3513                         return;
3514                 case 'Q':
3515                         /* Q - Turn Emulator messages on/off */
3516                         p++;
3517                         switch (isdn_getnum(&p)) {
3518                         case 0:
3519                                 m->mdmreg[REG_RESP] |= BIT_RESP;
3520                                 break;
3521                         case 1:
3522                                 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3523                                 break;
3524                         default:
3525                                 PARSE_ERROR;
3526                         }
3527                         break;
3528                 case 'S':
3529                         /* S - Set/Get Register */
3530                         p++;
3531                         if (isdn_tty_cmd_ATS(&p, info))
3532                                 return;
3533                         break;
3534                 case 'V':
3535                         /* V - Numeric or ASCII Emulator-messages */
3536                         p++;
3537                         switch (isdn_getnum(&p)) {
3538                         case 0:
3539                                 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3540                                 break;
3541                         case 1:
3542                                 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3543                                 break;
3544                         default:
3545                                 PARSE_ERROR;
3546                         }
3547                         break;
3548                 case 'Z':
3549                         /* Z - Load Registers from Profile */
3550                         p++;
3551                         if (info->msr & UART_MSR_DCD) {
3552                                 info->online = 0;
3553                                 isdn_tty_on_hook(info);
3554                         }
3555                         isdn_tty_modem_reset_regs(info, 1);
3556                         break;
3557                 case '+':
3558                         p++;
3559                         switch (*p) {
3560 #ifdef CONFIG_ISDN_AUDIO
3561                         case 'F':
3562                                 p++;
3563                                 if (isdn_tty_cmd_PLUSF(&p, info))
3564                                         return;
3565                                 break;
3566                         case 'V':
3567                                 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3568                                     (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3569                                         PARSE_ERROR;
3570                                 p++;
3571                                 if (isdn_tty_cmd_PLUSV(&p, info))
3572                                         return;
3573                                 break;
3574 #endif                          /* CONFIG_ISDN_AUDIO */
3575                         case 'S':       /* SUSPEND */
3576                                 p++;
3577                                 isdn_tty_get_msnstr(ds, &p);
3578                                 isdn_tty_suspend(ds, info, m);
3579                                 break;
3580                         case 'R':       /* RESUME */
3581                                 p++;
3582                                 isdn_tty_get_msnstr(ds, &p);
3583                                 isdn_tty_resume(ds, info, m);
3584                                 break;
3585                         case 'M':       /* MESSAGE */
3586                                 p++;
3587                                 isdn_tty_send_msg(info, m, p);
3588                                 break;
3589                         default:
3590                                 PARSE_ERROR;
3591                         }
3592                         break;
3593                 case '&':
3594                         p++;
3595                         if (isdn_tty_cmd_ATand(&p, info))
3596                                 return;
3597                         break;
3598                 default:
3599                         PARSE_ERROR;
3600                 }
3601         }
3602 #ifdef CONFIG_ISDN_AUDIO
3603         if (!info->vonline)
3604 #endif
3605                 isdn_tty_modem_result(RESULT_OK, info);
3606 }
3607
3608 /* Need own toupper() because standard-toupper is not available
3609  * within modules.
3610  */
3611 #define my_toupper(c) (((c >= 'a') && (c <= 'z')) ? (c & 0xdf) : c)
3612
3613 /*
3614  * Perform line-editing of AT-commands
3615  *
3616  * Parameters:
3617  *   p        inputbuffer
3618  *   count    length of buffer
3619  *   channel  index to line (minor-device)
3620  */
3621 static int
3622 isdn_tty_edit_at(const char *p, int count, modem_info *info)
3623 {
3624         atemu *m = &info->emu;
3625         int total = 0;
3626         u_char c;
3627         char eb[2];
3628         int cnt;
3629
3630         for (cnt = count; cnt > 0; p++, cnt--) {
3631                 c = *p;
3632                 total++;
3633                 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3634                         /* Separator (CR or LF) */
3635                         m->mdmcmd[m->mdmcmdl] = 0;
3636                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3637                                 eb[0] = c;
3638                                 eb[1] = 0;
3639                                 isdn_tty_at_cout(eb, info);
3640                         }
3641                         if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3642                                 isdn_tty_parse_at(info);
3643                         m->mdmcmdl = 0;
3644                         continue;
3645                 }
3646                 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3647                         /* Backspace-Function */
3648                         if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3649                                 if (m->mdmcmdl)
3650                                         m->mdmcmdl--;
3651                                 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3652                                         isdn_tty_at_cout("\b", info);
3653                         }
3654                         continue;
3655                 }
3656                 if (cmdchar(c)) {
3657                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3658                                 eb[0] = c;
3659                                 eb[1] = 0;
3660                                 isdn_tty_at_cout(eb, info);
3661                         }
3662                         if (m->mdmcmdl < 255) {
3663                                 c = my_toupper(c);
3664                                 switch (m->mdmcmdl) {
3665                                 case 1:
3666                                         if (c == 'T') {
3667                                                 m->mdmcmd[m->mdmcmdl] = c;
3668                                                 m->mdmcmd[++m->mdmcmdl] = 0;
3669                                                 break;
3670                                         } else
3671                                                 m->mdmcmdl = 0;
3672                                         /* Fall through, check for 'A' */
3673                                 case 0:
3674                                         if (c == 'A') {
3675                                                 m->mdmcmd[m->mdmcmdl] = c;
3676                                                 m->mdmcmd[++m->mdmcmdl] = 0;
3677                                         }
3678                                         break;
3679                                 default:
3680                                         m->mdmcmd[m->mdmcmdl] = c;
3681                                         m->mdmcmd[++m->mdmcmdl] = 0;
3682                                 }
3683                         }
3684                 }
3685         }
3686         return total;
3687 }
3688
3689 /*
3690  * Switch all modem-channels who are online and got a valid
3691  * escape-sequence 1.5 seconds ago, to command-mode.
3692  * This function is called every second via timer-interrupt from within
3693  * timer-dispatcher isdn_timer_function()
3694  */
3695 void
3696 isdn_tty_modem_escape(void)
3697 {
3698         int ton = 0;
3699         int i;
3700         int midx;
3701
3702         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3703                 if (USG_MODEM(dev->usage[i]) && (midx = dev->m_idx[i]) >= 0) {
3704                         modem_info *info = &dev->mdm.info[midx];
3705                         if (info->online) {
3706                                 ton = 1;
3707                                 if ((info->emu.pluscount == 3) &&
3708                                     time_after(jiffies,
3709                                             info->emu.lastplus + PLUSWAIT2)) {
3710                                         info->emu.pluscount = 0;
3711                                         info->online = 0;
3712                                         isdn_tty_modem_result(RESULT_OK, info);
3713                                 }
3714                         }
3715                 }
3716         isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3717 }
3718
3719 /*
3720  * Put a RING-message to all modem-channels who have the RI-bit set.
3721  * This function is called every second via timer-interrupt from within
3722  * timer-dispatcher isdn_timer_function()
3723  */
3724 void
3725 isdn_tty_modem_ring(void)
3726 {
3727         int ton = 0;
3728         int i;
3729
3730         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3731                 modem_info *info = &dev->mdm.info[i];
3732                 if (info->msr & UART_MSR_RI) {
3733                         ton = 1;
3734                         isdn_tty_modem_result(RESULT_RING, info);
3735                 }
3736         }
3737         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3738 }
3739
3740 /*
3741  * For all online tty's, try sending data to
3742  * the lower levels.
3743  */
3744 void
3745 isdn_tty_modem_xmit(void)
3746 {
3747         int ton = 1;
3748         int i;
3749
3750         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3751                 modem_info *info = &dev->mdm.info[i];
3752                 if (info->online) {
3753                         ton = 1;
3754                         isdn_tty_senddown(info);
3755                         isdn_tty_tint(info);
3756                 }
3757         }
3758         isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3759 }
3760
3761 /*
3762  * Check all channels if we have a 'no carrier' timeout.
3763  * Timeout value is set by Register S7.
3764  */
3765 void
3766 isdn_tty_carrier_timeout(void)
3767 {
3768         int ton = 0;
3769         int i;
3770
3771         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3772                 modem_info *info = &dev->mdm.info[i];
3773                 if (!info->dialing)
3774                         continue;
3775                 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3776                         info->dialing = 0;
3777                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3778                         isdn_tty_modem_hup(info, 1);
3779                 } else
3780                         ton = 1;
3781         }
3782         isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3783 }