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