drivers/isdn/i4l/isdn_tty.c

   1 /* $Id: isdn_tty.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
   2  *
   3  * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
   4  *
   5  * Copyright 1994-1999  by Fritz Elfert (fritz@isdn4linux.de)
   6  * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  */
  12 #undef ISDN_TTY_STAT_DEBUG
  13
  14 #include <linux/isdn.h>
  15 #include <linux/delay.h>
  16 #include "isdn_common.h"
  17 #include "isdn_tty.h"
  18 #ifdef CONFIG_ISDN_AUDIO
  19 #include "isdn_audio.h"
  20 #define VBUF 0x3e0
  21 #define VBUFX (VBUF/16)
  22 #endif
  23
  24 #define FIX_FILE_TRANSFER
  25 #define DUMMY_HAYES_AT
  26
  27 /* Prototypes */
  28
  29 static int isdn_tty_edit_at(const char *, int, modem_info *);
  30 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
  31 static void isdn_tty_modem_reset_regs(modem_info *, int);
  32 static void isdn_tty_cmd_ATA(modem_info *);
  33 static void isdn_tty_flush_buffer(struct tty_struct *);
  34 static void isdn_tty_modem_result(int, modem_info *);
  35 #ifdef CONFIG_ISDN_AUDIO
  36 static int isdn_tty_countDLE(unsigned char *, int);
  37 #endif
  38
  39 /* Leave this unchanged unless you know what you do! */
  40 #define MODEM_PARANOIA_CHECK
  41 #define MODEM_DO_RESTART
  42
  43 static int bit2si[8] =
  44 {1, 5, 7, 7, 7, 7, 7, 7};
  45 static int si2bit[8] =
  46 {4, 1, 4, 4, 4, 4, 4, 4};
  47
  48 char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
  49
  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                 if ((tty = info->tty)) {
  70                         if (info->mcr & UART_MCR_RTS) {
  71                                 len = skb->len
  72 #ifdef CONFIG_ISDN_AUDIO
  73                                         + ISDN_AUDIO_SKB_DLECOUNT(skb)
  74 #endif
  75                                         ;
  76
  77                                 c = tty_buffer_request_room(tty, len);
  78                                 if (c >= len) {
  79 #ifdef CONFIG_ISDN_AUDIO
  80                                         if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
  81                                                 int l = skb->len;
  82                                                 unsigned char *dp = skb->data;
  83                                                 while (--l) {
  84                                                         if (*dp == DLE)
  85                                                                 tty_insert_flip_char(tty, DLE, 0);
  86                                                         tty_insert_flip_char(tty, *dp++, 0);
  87                                                 }
  88                                                 if (*dp == DLE)
  89                                                         tty_insert_flip_char(tty, DLE, 0);
  90                                                 last = *dp;
  91                                         } else {
  92 #endif
  93                                                 if(len > 1)
  94                                                         tty_insert_flip_string(tty, skb->data, len - 1);
  95                                                 last = skb->data[len - 1];
  96 #ifdef CONFIG_ISDN_AUDIO
  97                                         }
  98 #endif
  99                                         if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
 100                                                 tty_insert_flip_char(tty, last, 0xFF);
 101                                         else
 102                                                 tty_insert_flip_char(tty, last, TTY_NORMAL);
 103                                         tty_flip_buffer_push(tty);
 104                                         kfree_skb(skb);
 105                                         return 1;
 106                                 }
 107                         }
 108                 }
 109         }
 110         return 0;
 111 }
 112
 113 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
 114  * It tries getting received data from the receive queue an stuff it into
 115  * the tty's flip-buffer.
 116  */
 117 void
 118 isdn_tty_readmodem(void)
 119 {
 120         int resched = 0;
 121         int midx;
 122         int i;
 123         int r;
 124         struct tty_struct *tty;
 125         modem_info *info;
 126
 127         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
 128                 if ((midx = dev->m_idx[i]) >= 0) {
 129                         info = &dev->mdm.info[midx];
 130                         if (info->online) {
 131                                 r = 0;
 132 #ifdef CONFIG_ISDN_AUDIO
 133                                 isdn_audio_eval_dtmf(info);
 134                                 if ((info->vonline & 1) && (info->emu.vpar[1]))
 135                                         isdn_audio_eval_silence(info);
 136 #endif
 137                                 if ((tty = info->tty)) {
 138                                         if (info->mcr & UART_MCR_RTS) {
 139                                                 /* CISCO AsyncPPP Hack */
 140                                                 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
 141                                                         r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
 142                                                 else
 143                                                         r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
 144                                                 if (r)
 145                                                         tty_flip_buffer_push(tty);
 146                                         } else
 147                                                 r = 1;
 148                                 } else
 149                                         r = 1;
 150                                 if (r) {
 151                                         info->rcvsched = 0;
 152                                         resched = 1;
 153                                 } else
 154                                         info->rcvsched = 1;
 155                         }
 156                 }
 157         }
 158         if (!resched)
 159                 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
 160 }
 161
 162 int
 163 isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
 164 {
 165         ulong flags;
 166         int midx;
 167 #ifdef CONFIG_ISDN_AUDIO
 168         int ifmt;
 169 #endif
 170         modem_info *info;
 171
 172         if ((midx = dev->m_idx[i]) < 0) {
 173                 /* if midx is invalid, packet is not for tty */
 174                 return 0;
 175         }
 176         info = &dev->mdm.info[midx];
 177 #ifdef CONFIG_ISDN_AUDIO
 178         ifmt = 1;
 179
 180         if ((info->vonline) && (!info->emu.vpar[4]))
 181                 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
 182         if ((info->vonline & 1) && (info->emu.vpar[1]))
 183                 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
 184 #endif
 185         if ((info->online < 2)
 186 #ifdef CONFIG_ISDN_AUDIO
 187             && (!(info->vonline & 1))
 188 #endif
 189                 ) {
 190                 /* If Modem not listening, drop data */
 191                 kfree_skb(skb);
 192                 return 1;
 193         }
 194         if (info->emu.mdmreg[REG_T70] & BIT_T70) {
 195                 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
 196                         /* T.70 decoding: throw away the T.70 header (2 or 4 bytes)   */
 197                         if (skb->data[0] == 3) /* pure data packet -> 4 byte headers  */
 198                                 skb_pull(skb, 4);
 199                         else
 200                                 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr  */
 201                                         skb_pull(skb, 2);
 202                 } else
 203                         /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
 204                         if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
 205                                 skb_pull(skb, 4);
 206         }
 207 #ifdef CONFIG_ISDN_AUDIO
 208         ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
 209         ISDN_AUDIO_SKB_LOCK(skb) = 0;
 210         if (info->vonline & 1) {
 211                 /* voice conversion/compression */
 212                 switch (info->emu.vpar[3]) {
 213                         case 2:
 214                         case 3:
 215                         case 4:
 216                                 /* adpcm
 217                                  * Since compressed data takes less
 218                                  * space, we can overwrite the buffer.
 219                                  */
 220                                 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
 221                                                                     ifmt,
 222                                                                     skb->data,
 223                                                                     skb->data,
 224                                                                     skb->len));
 225                                 break;
 226                         case 5:
 227                                 /* a-law */
 228                                 if (!ifmt)
 229                                         isdn_audio_ulaw2alaw(skb->data, skb->len);
 230                                 break;
 231                         case 6:
 232                                 /* u-law */
 233                                 if (ifmt)
 234                                         isdn_audio_alaw2ulaw(skb->data, skb->len);
 235                                 break;
 236                 }
 237                 ISDN_AUDIO_SKB_DLECOUNT(skb) =
 238                         isdn_tty_countDLE(skb->data, skb->len);
 239         }
 240 #ifdef CONFIG_ISDN_TTY_FAX
 241         else {
 242                 if (info->faxonline & 2) {
 243                         isdn_tty_fax_bitorder(info, skb);
 244                         ISDN_AUDIO_SKB_DLECOUNT(skb) =
 245                                 isdn_tty_countDLE(skb->data, skb->len);
 246                 }
 247         }
 248 #endif
 249 #endif
 250         /* Try to deliver directly via tty-buf if queue is empty */
 251         spin_lock_irqsave(&info->readlock, flags);
 252         if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
 253                 if (isdn_tty_try_read(info, skb)) {
 254                         spin_unlock_irqrestore(&info->readlock, flags);
 255                         return 1;
 256                 }
 257         /* Direct deliver failed or queue wasn't empty.
 258          * Queue up for later dequeueing via timer-irq.
 259          */
 260         __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
 261         dev->drv[di]->rcvcount[channel] +=
 262                 (skb->len
 263 #ifdef CONFIG_ISDN_AUDIO
 264                  + ISDN_AUDIO_SKB_DLECOUNT(skb)
 265 #endif
 266                         );
 267         spin_unlock_irqrestore(&info->readlock, flags);
 268         /* Schedule dequeuing */
 269         if ((dev->modempoll) && (info->rcvsched))
 270                 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
 271         return 1;
 272 }
 273
 274 static void
 275 isdn_tty_cleanup_xmit(modem_info * info)
 276 {
 277         skb_queue_purge(&info->xmit_queue);
 278 #ifdef CONFIG_ISDN_AUDIO
 279         skb_queue_purge(&info->dtmf_queue);
 280 #endif
 281 }
 282
 283 static void
 284 isdn_tty_tint(modem_info * info)
 285 {
 286         struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
 287         int len, slen;
 288
 289         if (!skb)
 290                 return;
 291         len = skb->len;
 292         if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
 293                                            info->isdn_channel, 1, skb)) == len) {
 294                 struct tty_struct *tty = info->tty;
 295                 info->send_outstanding++;
 296                 info->msr &= ~UART_MSR_CTS;
 297                 info->lsr &= ~UART_LSR_TEMT;
 298                 tty_wakeup(tty);
 299                 return;
 300         }
 301         if (slen < 0) {
 302                 /* Error: no channel, already shutdown, or wrong parameter */
 303                 dev_kfree_skb(skb);
 304                 return;
 305         }
 306         skb_queue_head(&info->xmit_queue, skb);
 307 }
 308
 309 #ifdef CONFIG_ISDN_AUDIO
 310 static int
 311 isdn_tty_countDLE(unsigned char *buf, int len)
 312 {
 313         int count = 0;
 314
 315         while (len--)
 316                 if (*buf++ == DLE)
 317                         count++;
 318         return count;
 319 }
 320
 321 /* This routine is called from within isdn_tty_write() to perform
 322  * DLE-decoding when sending audio-data.
 323  */
 324 static int
 325 isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
 326 {
 327         unsigned char *p = &info->xmit_buf[info->xmit_count];
 328         int count = 0;
 329
 330         while (len > 0) {
 331                 if (m->lastDLE) {
 332                         m->lastDLE = 0;
 333                         switch (*p) {
 334                                 case DLE:
 335                                         /* Escape code */
 336                                         if (len > 1)
 337                                                 memmove(p, p + 1, len - 1);
 338                                         p--;
 339                                         count++;
 340                                         break;
 341                                 case ETX:
 342                                         /* End of data */
 343                                         info->vonline |= 4;
 344                                         return count;
 345                                 case DC4:
 346                                         /* Abort RX */
 347                                         info->vonline &= ~1;
 348 #ifdef ISDN_DEBUG_MODEM_VOICE
 349                                         printk(KERN_DEBUG
 350                                                "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
 351                                                info->line);
 352 #endif
 353                                         isdn_tty_at_cout("\020\003", info);
 354                                         if (!info->vonline) {
 355 #ifdef ISDN_DEBUG_MODEM_VOICE
 356                                                 printk(KERN_DEBUG
 357                                                        "DLEdown: send VCON on ttyI%d\n",
 358                                                        info->line);
 359 #endif
 360                                                 isdn_tty_at_cout("\r\nVCON\r\n", info);
 361                                         }
 362                                         /* Fall through */
 363                                 case 'q':
 364                                 case 's':
 365                                         /* Silence */
 366                                         if (len > 1)
 367                                                 memmove(p, p + 1, len - 1);
 368                                         p--;
 369                                         break;
 370                         }
 371                 } else {
 372                         if (*p == DLE)
 373                                 m->lastDLE = 1;
 374                         else
 375                                 count++;
 376                 }
 377                 p++;
 378                 len--;
 379         }
 380         if (len < 0) {
 381                 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
 382                 return 0;
 383         }
 384         return count;
 385 }
 386
 387 /* This routine is called from within isdn_tty_write() when receiving
 388  * audio-data. It interrupts receiving, if an character other than
 389  * ^S or ^Q is sent.
 390  */
 391 static int
 392 isdn_tty_end_vrx(const char *buf, int c)
 393 {
 394         char ch;
 395
 396         while (c--) {
 397                 ch = *buf;
 398                 if ((ch != 0x11) && (ch != 0x13))
 399                         return 1;
 400                 buf++;
 401         }
 402         return 0;
 403 }
 404
 405 static int voice_cf[7] =
 406 {0, 0, 4, 3, 2, 0, 0};
 407
 408 #endif                          /* CONFIG_ISDN_AUDIO */
 409
 410 /* isdn_tty_senddown() is called either directly from within isdn_tty_write()
 411  * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
 412  * outgoing data from the tty's xmit-buffer, handles voice-decompression or
 413  * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
 414  */
 415 static void
 416 isdn_tty_senddown(modem_info * info)
 417 {
 418         int buflen;
 419         int skb_res;
 420 #ifdef CONFIG_ISDN_AUDIO
 421         int audio_len;
 422 #endif
 423         struct sk_buff *skb;
 424
 425 #ifdef CONFIG_ISDN_AUDIO
 426         if (info->vonline & 4) {
 427                 info->vonline &= ~6;
 428                 if (!info->vonline) {
 429 #ifdef ISDN_DEBUG_MODEM_VOICE
 430                         printk(KERN_DEBUG
 431                                "senddown: send VCON on ttyI%d\n",
 432                                info->line);
 433 #endif
 434                         isdn_tty_at_cout("\r\nVCON\r\n", info);
 435                 }
 436         }
 437 #endif
 438         if (!(buflen = info->xmit_count))
 439                 return;
 440         if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
 441                 info->msr &= ~UART_MSR_CTS;
 442         info->lsr &= ~UART_LSR_TEMT;
 443         /* info->xmit_count is modified here and in isdn_tty_write().
 444          * So we return here if isdn_tty_write() is in the
 445          * critical section.
 446          */
 447         atomic_inc(&info->xmit_lock);
 448         if (!(atomic_dec_and_test(&info->xmit_lock)))
 449                 return;
 450         if (info->isdn_driver < 0) {
 451                 info->xmit_count = 0;
 452                 return;
 453         }
 454         skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
 455 #ifdef CONFIG_ISDN_AUDIO
 456         if (info->vonline & 2)
 457                 audio_len = buflen * voice_cf[info->emu.vpar[3]];
 458         else
 459                 audio_len = 0;
 460         skb = dev_alloc_skb(skb_res + buflen + audio_len);
 461 #else
 462         skb = dev_alloc_skb(skb_res + buflen);
 463 #endif
 464         if (!skb) {
 465                 printk(KERN_WARNING
 466                        "isdn_tty: Out of memory in ttyI%d senddown\n",
 467                        info->line);
 468                 return;
 469         }
 470         skb_reserve(skb, skb_res);
 471         memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
 472         info->xmit_count = 0;
 473 #ifdef CONFIG_ISDN_AUDIO
 474         if (info->vonline & 2) {
 475                 /* For now, ifmt is fixed to 1 (alaw), since this
 476                  * is used with ISDN everywhere in the world, except
 477                  * US, Canada and Japan.
 478                  * Later, when US-ISDN protocols are implemented,
 479                  * this setting will depend on the D-channel protocol.
 480                  */
 481                 int ifmt = 1;
 482
 483                 /* voice conversion/decompression */
 484                 switch (info->emu.vpar[3]) {
 485                         case 2:
 486                         case 3:
 487                         case 4:
 488                                 /* adpcm, compatible to ZyXel 1496 modem
 489                                  * with ROM revision 6.01
 490                                  */
 491                                 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
 492                                                                   ifmt,
 493                                                                   skb->data,
 494                                                     skb_put(skb, audio_len),
 495                                                                   buflen);
 496                                 skb_pull(skb, buflen);
 497                                 skb_trim(skb, audio_len);
 498                                 break;
 499                         case 5:
 500                                 /* a-law */
 501                                 if (!ifmt)
 502                                         isdn_audio_alaw2ulaw(skb->data,
 503                                                              buflen);
 504                                 break;
 505                         case 6:
 506                                 /* u-law */
 507                                 if (ifmt)
 508                                         isdn_audio_ulaw2alaw(skb->data,
 509                                                              buflen);
 510                                 break;
 511                 }
 512         }
 513 #endif                          /* CONFIG_ISDN_AUDIO */
 514         if (info->emu.mdmreg[REG_T70] & BIT_T70) {
 515                 /* Add T.70 simplified header */
 516                 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
 517                         memcpy(skb_push(skb, 2), "\1\0", 2);
 518                 else
 519                         memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
 520         }
 521         skb_queue_tail(&info->xmit_queue, skb);
 522 }
 523
 524 /************************************************************
 525  *
 526  * Modem-functions
 527  *
 528  * mostly "stolen" from original Linux-serial.c and friends.
 529  *
 530  ************************************************************/
 531
 532 /* The next routine is called once from within timer-interrupt
 533  * triggered within isdn_tty_modem_ncarrier(). It calls
 534  * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
 535  * into the tty's buffer.
 536  */
 537 static void
 538 isdn_tty_modem_do_ncarrier(unsigned long data)
 539 {
 540         modem_info *info = (modem_info *) data;
 541         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
 542 }
 543
 544 /* Next routine is called, whenever the DTR-signal is raised.
 545  * It checks the ncarrier-flag, and triggers the above routine
 546  * when necessary. The ncarrier-flag is set, whenever DTR goes
 547  * low.
 548  */
 549 static void
 550 isdn_tty_modem_ncarrier(modem_info * info)
 551 {
 552         if (info->ncarrier) {
 553                 info->nc_timer.expires = jiffies + HZ;
 554                 add_timer(&info->nc_timer);
 555         }
 556 }
 557
 558 /*
 559  * return the usage calculated by si and layer 2 protocol
 560  */
 561 static int
 562 isdn_calc_usage(int si, int l2)
 563 {
 564         int usg = ISDN_USAGE_MODEM;
 565
 566 #ifdef CONFIG_ISDN_AUDIO
 567         if (si == 1) {
 568                 switch(l2) {
 569                         case ISDN_PROTO_L2_MODEM:
 570                                 usg = ISDN_USAGE_MODEM;
 571                                 break;
 572 #ifdef CONFIG_ISDN_TTY_FAX
 573                         case ISDN_PROTO_L2_FAX:
 574                                 usg = ISDN_USAGE_FAX;
 575                                 break;
 576 #endif
 577                         case ISDN_PROTO_L2_TRANS:
 578                         default:
 579                                 usg = ISDN_USAGE_VOICE;
 580                                 break;
 581                 }
 582         }
 583 #endif
 584         return(usg);
 585 }
 586
 587 /* isdn_tty_dial() performs dialing of a tty an the necessary
 588  * setup of the lower levels before that.
 589  */
 590 static void
 591 isdn_tty_dial(char *n, modem_info * info, atemu * m)
 592 {
 593         int usg = ISDN_USAGE_MODEM;
 594         int si = 7;
 595         int l2 = m->mdmreg[REG_L2PROT];
 596         u_long flags;
 597         isdn_ctrl cmd;
 598         int i;
 599         int j;
 600
 601         for (j = 7; j >= 0; j--)
 602                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 603                         si = bit2si[j];
 604                         break;
 605                 }
 606         usg = isdn_calc_usage(si, l2);
 607 #ifdef CONFIG_ISDN_AUDIO
 608         if ((si == 1) &&
 609                 (l2 != ISDN_PROTO_L2_MODEM)
 610 #ifdef CONFIG_ISDN_TTY_FAX
 611                 && (l2 != ISDN_PROTO_L2_FAX)
 612 #endif
 613                 ) {
 614                 l2 = ISDN_PROTO_L2_TRANS;
 615                 usg = ISDN_USAGE_VOICE;
 616         }
 617 #endif
 618         m->mdmreg[REG_SI1I] = si2bit[si];
 619         spin_lock_irqsave(&dev->lock, flags);
 620         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 621         if (i < 0) {
 622                 spin_unlock_irqrestore(&dev->lock, flags);
 623                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 624         } else {
 625                 info->isdn_driver = dev->drvmap[i];
 626                 info->isdn_channel = dev->chanmap[i];
 627                 info->drv_index = i;
 628                 dev->m_idx[i] = info->line;
 629                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 630                 info->last_dir = 1;
 631                 strcpy(info->last_num, n);
 632                 isdn_info_update();
 633                 spin_unlock_irqrestore(&dev->lock, flags);
 634                 cmd.driver = info->isdn_driver;
 635                 cmd.arg = info->isdn_channel;
 636                 cmd.command = ISDN_CMD_CLREAZ;
 637                 isdn_command(&cmd);
 638                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 639                 cmd.driver = info->isdn_driver;
 640                 cmd.command = ISDN_CMD_SETEAZ;
 641                 isdn_command(&cmd);
 642                 cmd.driver = info->isdn_driver;
 643                 cmd.command = ISDN_CMD_SETL2;
 644                 info->last_l2 = l2;
 645                 cmd.arg = info->isdn_channel + (l2 << 8);
 646                 isdn_command(&cmd);
 647                 cmd.driver = info->isdn_driver;
 648                 cmd.command = ISDN_CMD_SETL3;
 649                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 650 #ifdef CONFIG_ISDN_TTY_FAX
 651                 if (l2 == ISDN_PROTO_L2_FAX) {
 652                         cmd.parm.fax = info->fax;
 653                         info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
 654                 }
 655 #endif
 656                 isdn_command(&cmd);
 657                 cmd.driver = info->isdn_driver;
 658                 cmd.arg = info->isdn_channel;
 659                 sprintf(cmd.parm.setup.phone, "%s", n);
 660                 sprintf(cmd.parm.setup.eazmsn, "%s",
 661                         isdn_map_eaz2msn(m->msn, info->isdn_driver));
 662                 cmd.parm.setup.si1 = si;
 663                 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
 664                 cmd.command = ISDN_CMD_DIAL;
 665                 info->dialing = 1;
 666                 info->emu.carrierwait = 0;
 667                 strcpy(dev->num[i], n);
 668                 isdn_info_update();
 669                 isdn_command(&cmd);
 670                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
 671         }
 672 }
 673
 674 /* isdn_tty_hangup() disassociates a tty from the real
 675  * ISDN-line (hangup). The usage-status is cleared
 676  * and some cleanup is done also.
 677  */
 678 void
 679 isdn_tty_modem_hup(modem_info * info, int local)
 680 {
 681         isdn_ctrl cmd;
 682         int di, ch;
 683
 684         if (!info)
 685                 return;
 686
 687         di = info->isdn_driver;
 688         ch = info->isdn_channel;
 689         if (di < 0 || ch < 0)
 690                 return;
 691
 692         info->isdn_driver = -1;
 693         info->isdn_channel = -1;
 694
 695 #ifdef ISDN_DEBUG_MODEM_HUP
 696         printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
 697 #endif
 698         info->rcvsched = 0;
 699         isdn_tty_flush_buffer(info->tty);
 700         if (info->online) {
 701                 info->last_lhup = local;
 702                 info->online = 0;
 703                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
 704         }
 705 #ifdef CONFIG_ISDN_AUDIO
 706         info->vonline = 0;
 707 #ifdef CONFIG_ISDN_TTY_FAX
 708         info->faxonline = 0;
 709         info->fax->phase = ISDN_FAX_PHASE_IDLE;
 710 #endif
 711         info->emu.vpar[4] = 0;
 712         info->emu.vpar[5] = 8;
 713         kfree(info->dtmf_state);
 714         info->dtmf_state = NULL;
 715         kfree(info->silence_state);
 716         info->silence_state = NULL;
 717         kfree(info->adpcms);
 718         info->adpcms = NULL;
 719         kfree(info->adpcmr);
 720         info->adpcmr = NULL;
 721 #endif
 722         if ((info->msr & UART_MSR_RI) &&
 723                 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
 724                 isdn_tty_modem_result(RESULT_RUNG, info);
 725         info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
 726         info->lsr |= UART_LSR_TEMT;
 727
 728         if (local) {
 729                 cmd.driver = di;
 730                 cmd.command = ISDN_CMD_HANGUP;
 731                 cmd.arg = ch;
 732                 isdn_command(&cmd);
 733         }
 734
 735         isdn_all_eaz(di, ch);
 736         info->emu.mdmreg[REG_RINGCNT] = 0;
 737         isdn_free_channel(di, ch, 0);
 738
 739         if (info->drv_index >= 0) {
 740                 dev->m_idx[info->drv_index] = -1;
 741                 info->drv_index = -1;
 742         }
 743 }
 744
 745 /*
 746  * Begin of a CAPI like interface, currently used only for
 747  * supplementary service (CAPI 2.0 part III)
 748  */
 749 #include <linux/isdn/capicmd.h>
 750
 751 int
 752 isdn_tty_capi_facility(capi_msg *cm) {
 753         return(-1); /* dummy */
 754 }
 755
 756 /* isdn_tty_suspend() tries to suspend the current tty connection
 757  */
 758 static void
 759 isdn_tty_suspend(char *id, modem_info * info, atemu * m)
 760 {
 761         isdn_ctrl cmd;
 762
 763         int l;
 764
 765         if (!info)
 766                 return;
 767
 768 #ifdef ISDN_DEBUG_MODEM_SERVICES
 769         printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
 770 #endif
 771         l = strlen(id);
 772         if ((info->isdn_driver >= 0)) {
 773                 cmd.parm.cmsg.Length = l+18;
 774                 cmd.parm.cmsg.Command = CAPI_FACILITY;
 775                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 776                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 777                 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
 778                 cmd.parm.cmsg.para[1] = 0;
 779                 cmd.parm.cmsg.para[2] = l + 3;
 780                 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
 781                 cmd.parm.cmsg.para[4] = 0;
 782                 cmd.parm.cmsg.para[5] = l;
 783                 strncpy(&cmd.parm.cmsg.para[6], id, l);
 784                 cmd.command = CAPI_PUT_MESSAGE;
 785                 cmd.driver = info->isdn_driver;
 786                 cmd.arg = info->isdn_channel;
 787                 isdn_command(&cmd);
 788         }
 789 }
 790
 791 /* isdn_tty_resume() tries to resume a suspended call
 792  * setup of the lower levels before that. unfortunatly here is no
 793  * checking for compatibility of used protocols implemented by Q931
 794  * It does the same things like isdn_tty_dial, the last command
 795  * is different, may be we can merge it.
 796  */
 797
 798 static void
 799 isdn_tty_resume(char *id, modem_info * info, atemu * m)
 800 {
 801         int usg = ISDN_USAGE_MODEM;
 802         int si = 7;
 803         int l2 = m->mdmreg[REG_L2PROT];
 804         isdn_ctrl cmd;
 805         ulong flags;
 806         int i;
 807         int j;
 808         int l;
 809
 810         l = strlen(id);
 811         for (j = 7; j >= 0; j--)
 812                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 813                         si = bit2si[j];
 814                         break;
 815                 }
 816         usg = isdn_calc_usage(si, l2);
 817 #ifdef CONFIG_ISDN_AUDIO
 818         if ((si == 1) &&
 819                 (l2 != ISDN_PROTO_L2_MODEM)
 820 #ifdef CONFIG_ISDN_TTY_FAX
 821                 && (l2 != ISDN_PROTO_L2_FAX)
 822 #endif
 823                 ) {
 824                 l2 = ISDN_PROTO_L2_TRANS;
 825                 usg = ISDN_USAGE_VOICE;
 826         }
 827 #endif
 828         m->mdmreg[REG_SI1I] = si2bit[si];
 829         spin_lock_irqsave(&dev->lock, flags);
 830         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 831         if (i < 0) {
 832                 spin_unlock_irqrestore(&dev->lock, flags);
 833                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 834         } else {
 835                 info->isdn_driver = dev->drvmap[i];
 836                 info->isdn_channel = dev->chanmap[i];
 837                 info->drv_index = i;
 838                 dev->m_idx[i] = info->line;
 839                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 840                 info->last_dir = 1;
 841 //              strcpy(info->last_num, n);
 842                 isdn_info_update();
 843                 spin_unlock_irqrestore(&dev->lock, flags);
 844                 cmd.driver = info->isdn_driver;
 845                 cmd.arg = info->isdn_channel;
 846                 cmd.command = ISDN_CMD_CLREAZ;
 847                 isdn_command(&cmd);
 848                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 849                 cmd.driver = info->isdn_driver;
 850                 cmd.command = ISDN_CMD_SETEAZ;
 851                 isdn_command(&cmd);
 852                 cmd.driver = info->isdn_driver;
 853                 cmd.command = ISDN_CMD_SETL2;
 854                 info->last_l2 = l2;
 855                 cmd.arg = info->isdn_channel + (l2 << 8);
 856                 isdn_command(&cmd);
 857                 cmd.driver = info->isdn_driver;
 858                 cmd.command = ISDN_CMD_SETL3;
 859                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 860                 isdn_command(&cmd);
 861                 cmd.driver = info->isdn_driver;
 862                 cmd.arg = info->isdn_channel;
 863                 cmd.parm.cmsg.Length = l+18;
 864                 cmd.parm.cmsg.Command = CAPI_FACILITY;
 865                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 866                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 867                 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
 868                 cmd.parm.cmsg.para[1] = 0;
 869                 cmd.parm.cmsg.para[2] = l+3;
 870                 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
 871                 cmd.parm.cmsg.para[4] = 0;
 872                 cmd.parm.cmsg.para[5] = l;
 873                 strncpy(&cmd.parm.cmsg.para[6], id, l);
 874                 cmd.command =CAPI_PUT_MESSAGE;
 875                 info->dialing = 1;
 876 //              strcpy(dev->num[i], n);
 877                 isdn_info_update();
 878                 isdn_command(&cmd);
 879                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
 880         }
 881 }
 882
 883 /* isdn_tty_send_msg() sends a message to a HL driver
 884  * This is used for hybrid modem cards to send AT commands to it
 885  */
 886
 887 static void
 888 isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
 889 {
 890         int usg = ISDN_USAGE_MODEM;
 891         int si = 7;
 892         int l2 = m->mdmreg[REG_L2PROT];
 893         isdn_ctrl cmd;
 894         ulong flags;
 895         int i;
 896         int j;
 897         int l;
 898
 899         l = strlen(msg);
 900         if (!l) {
 901                 isdn_tty_modem_result(RESULT_ERROR, info);
 902                 return;
 903         }
 904         for (j = 7; j >= 0; j--)
 905                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 906                         si = bit2si[j];
 907                         break;
 908                 }
 909         usg = isdn_calc_usage(si, l2);
 910 #ifdef CONFIG_ISDN_AUDIO
 911         if ((si == 1) &&
 912                 (l2 != ISDN_PROTO_L2_MODEM)
 913 #ifdef CONFIG_ISDN_TTY_FAX
 914                 && (l2 != ISDN_PROTO_L2_FAX)
 915 #endif
 916                 ) {
 917                 l2 = ISDN_PROTO_L2_TRANS;
 918                 usg = ISDN_USAGE_VOICE;
 919         }
 920 #endif
 921         m->mdmreg[REG_SI1I] = si2bit[si];
 922         spin_lock_irqsave(&dev->lock, flags);
 923         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 924         if (i < 0) {
 925                 spin_unlock_irqrestore(&dev->lock, flags);
 926                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 927         } else {
 928                 info->isdn_driver = dev->drvmap[i];
 929                 info->isdn_channel = dev->chanmap[i];
 930                 info->drv_index = i;
 931                 dev->m_idx[i] = info->line;
 932                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 933                 info->last_dir = 1;
 934                 isdn_info_update();
 935                 spin_unlock_irqrestore(&dev->lock, flags);
 936                 cmd.driver = info->isdn_driver;
 937                 cmd.arg = info->isdn_channel;
 938                 cmd.command = ISDN_CMD_CLREAZ;
 939                 isdn_command(&cmd);
 940                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 941                 cmd.driver = info->isdn_driver;
 942                 cmd.command = ISDN_CMD_SETEAZ;
 943                 isdn_command(&cmd);
 944                 cmd.driver = info->isdn_driver;
 945                 cmd.command = ISDN_CMD_SETL2;
 946                 info->last_l2 = l2;
 947                 cmd.arg = info->isdn_channel + (l2 << 8);
 948                 isdn_command(&cmd);
 949                 cmd.driver = info->isdn_driver;
 950                 cmd.command = ISDN_CMD_SETL3;
 951                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 952                 isdn_command(&cmd);
 953                 cmd.driver = info->isdn_driver;
 954                 cmd.arg = info->isdn_channel;
 955                 cmd.parm.cmsg.Length = l+14;
 956                 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
 957                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 958                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 959                 cmd.parm.cmsg.para[0] = l+1;
 960                 strncpy(&cmd.parm.cmsg.para[1], msg, l);
 961                 cmd.parm.cmsg.para[l+1] = 0xd;
 962                 cmd.command =CAPI_PUT_MESSAGE;
 963 /*              info->dialing = 1;
 964                 strcpy(dev->num[i], n);
 965                 isdn_info_update();
 966 */
 967                 isdn_command(&cmd);
 968         }
 969 }
 970
 971 static inline int
 972 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
 973 {
 974 #ifdef MODEM_PARANOIA_CHECK
 975         if (!info) {
 976                 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
 977                         name, routine);
 978                 return 1;
 979         }
 980         if (info->magic != ISDN_ASYNC_MAGIC) {
 981                 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
 982                        name, routine);
 983                 return 1;
 984         }
 985 #endif
 986         return 0;
 987 }
 988
 989 /*
 990  * This routine is called to set the UART divisor registers to match
 991  * the specified baud rate for a serial port.
 992  */
 993 static void
 994 isdn_tty_change_speed(modem_info * info)
 995 {
 996         uint cflag,
 997          cval,
 998          fcr,
 999          quot;
1000         int i;
1001
1002         if (!info->tty || !info->tty->termios)
1003                 return;
1004         cflag = info->tty->termios->c_cflag;
1005
1006         quot = i = cflag & CBAUD;
1007         if (i & CBAUDEX) {
1008                 i &= ~CBAUDEX;
1009                 if (i < 1 || i > 2)
1010                         info->tty->termios->c_cflag &= ~CBAUDEX;
1011                 else
1012                         i += 15;
1013         }
1014         if (quot) {
1015                 info->mcr |= UART_MCR_DTR;
1016                 isdn_tty_modem_ncarrier(info);
1017         } else {
1018                 info->mcr &= ~UART_MCR_DTR;
1019                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1020 #ifdef ISDN_DEBUG_MODEM_HUP
1021                         printk(KERN_DEBUG "Mhup in changespeed\n");
1022 #endif
1023                         if (info->online)
1024                                 info->ncarrier = 1;
1025                         isdn_tty_modem_reset_regs(info, 0);
1026                         isdn_tty_modem_hup(info, 1);
1027                 }
1028                 return;
1029         }
1030         /* byte size and parity */
1031         cval = cflag & (CSIZE | CSTOPB);
1032         cval >>= 4;
1033         if (cflag & PARENB)
1034                 cval |= UART_LCR_PARITY;
1035         if (!(cflag & PARODD))
1036                 cval |= UART_LCR_EPAR;
1037         fcr = 0;
1038
1039         /* CTS flow control flag and modem status interrupts */
1040         if (cflag & CRTSCTS) {
1041                 info->flags |= ISDN_ASYNC_CTS_FLOW;
1042         } else
1043                 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1044         if (cflag & CLOCAL)
1045                 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1046         else {
1047                 info->flags |= ISDN_ASYNC_CHECK_CD;
1048         }
1049 }
1050
1051 static int
1052 isdn_tty_startup(modem_info * info)
1053 {
1054         if (info->flags & ISDN_ASYNC_INITIALIZED)
1055                 return 0;
1056         isdn_lock_drivers();
1057 #ifdef ISDN_DEBUG_MODEM_OPEN
1058         printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1059 #endif
1060         /*
1061          * Now, initialize the UART
1062          */
1063         info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1064         if (info->tty)
1065                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1066         /*
1067          * and set the speed of the serial port
1068          */
1069         isdn_tty_change_speed(info);
1070
1071         info->flags |= ISDN_ASYNC_INITIALIZED;
1072         info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1073         info->send_outstanding = 0;
1074         return 0;
1075 }
1076
1077 /*
1078  * This routine will shutdown a serial port; interrupts are disabled, and
1079  * DTR is dropped if the hangup on close termio flag is on.
1080  */
1081 static void
1082 isdn_tty_shutdown(modem_info * info)
1083 {
1084         if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1085                 return;
1086 #ifdef ISDN_DEBUG_MODEM_OPEN
1087         printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1088 #endif
1089         isdn_unlock_drivers();
1090         info->msr &= ~UART_MSR_RI;
1091         if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1092                 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1093                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1094                         isdn_tty_modem_reset_regs(info, 0);
1095 #ifdef ISDN_DEBUG_MODEM_HUP
1096                         printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1097 #endif
1098                         isdn_tty_modem_hup(info, 1);
1099                 }
1100         }
1101         if (info->tty)
1102                 set_bit(TTY_IO_ERROR, &info->tty->flags);
1103
1104         info->flags &= ~ISDN_ASYNC_INITIALIZED;
1105 }
1106
1107 /* isdn_tty_write() is the main send-routine. It is called from the upper
1108  * levels within the kernel to perform sending data. Depending on the
1109  * online-flag it either directs output to the at-command-interpreter or
1110  * to the lower level. Additional tasks done here:
1111  *  - If online, check for escape-sequence (+++)
1112  *  - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1113  *  - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1114  *  - If dialing, abort dial.
1115  */
1116 static int
1117 isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
1118 {
1119         int c;
1120         int total = 0;
1121         modem_info *info = (modem_info *) tty->driver_data;
1122         atemu *m = &info->emu;
1123
1124         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1125                 return 0;
1126         /* See isdn_tty_senddown() */
1127         atomic_inc(&info->xmit_lock);
1128         while (1) {
1129                 c = count;
1130                 if (c > info->xmit_size - info->xmit_count)
1131                         c = info->xmit_size - info->xmit_count;
1132                 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1133                         c = dev->drv[info->isdn_driver]->maxbufsize;
1134                 if (c <= 0)
1135                         break;
1136                 if ((info->online > 1)
1137 #ifdef CONFIG_ISDN_AUDIO
1138                     || (info->vonline & 3)
1139 #endif
1140                         ) {
1141 #ifdef CONFIG_ISDN_AUDIO
1142                         if (!info->vonline)
1143 #endif
1144                                 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1145                                                    &(m->pluscount),
1146                                                    &(m->lastplus));
1147                         memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1148 #ifdef CONFIG_ISDN_AUDIO
1149                         if (info->vonline) {
1150                                 int cc = isdn_tty_handleDLEdown(info, m, c);
1151                                 if (info->vonline & 2) {
1152                                         if (!cc) {
1153                                                 /* If DLE decoding results in zero-transmit, but
1154                                                  * c originally was non-zero, do a wakeup.
1155                                                  */
1156                                                 tty_wakeup(tty);
1157                                                 info->msr |= UART_MSR_CTS;
1158                                                 info->lsr |= UART_LSR_TEMT;
1159                                         }
1160                                         info->xmit_count += cc;
1161                                 }
1162                                 if ((info->vonline & 3) == 1) {
1163                                         /* Do NOT handle Ctrl-Q or Ctrl-S
1164                                          * when in full-duplex audio mode.
1165                                          */
1166                                         if (isdn_tty_end_vrx(buf, c)) {
1167                                                 info->vonline &= ~1;
1168 #ifdef ISDN_DEBUG_MODEM_VOICE
1169                                                 printk(KERN_DEBUG
1170                                                        "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1171                                                        info->line);
1172 #endif
1173                                                 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1174                                         }
1175                                 }
1176                         } else
1177                         if (TTY_IS_FCLASS1(info)) {
1178                                 int cc = isdn_tty_handleDLEdown(info, m, c);
1179
1180                                 if (info->vonline & 4) { /* ETX seen */
1181                                         isdn_ctrl c;
1182
1183                                         c.command = ISDN_CMD_FAXCMD;
1184                                         c.driver = info->isdn_driver;
1185                                         c.arg = info->isdn_channel;
1186                                         c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1187                                         c.parm.aux.subcmd = ETX;
1188                                         isdn_command(&c);
1189                                 }
1190                                 info->vonline = 0;
1191 #ifdef ISDN_DEBUG_MODEM_VOICE
1192                                 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1193 #endif
1194                                 info->xmit_count += cc;
1195                         } else
1196 #endif
1197                                 info->xmit_count += c;
1198                 } else {
1199                         info->msr |= UART_MSR_CTS;
1200                         info->lsr |= UART_LSR_TEMT;
1201                         if (info->dialing) {
1202                                 info->dialing = 0;
1203 #ifdef ISDN_DEBUG_MODEM_HUP
1204                                 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1205 #endif
1206                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1207                                 isdn_tty_modem_hup(info, 1);
1208                         } else
1209                                 c = isdn_tty_edit_at(buf, c, info);
1210                 }
1211                 buf += c;
1212                 count -= c;
1213                 total += c;
1214         }
1215         atomic_dec(&info->xmit_lock);
1216         if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1217                 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1218                         isdn_tty_senddown(info);
1219                         isdn_tty_tint(info);
1220                 }
1221                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1222         }
1223         return total;
1224 }
1225
1226 static int
1227 isdn_tty_write_room(struct tty_struct *tty)
1228 {
1229         modem_info *info = (modem_info *) tty->driver_data;
1230         int ret;
1231
1232         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1233                 return 0;
1234         if (!info->online)
1235                 return info->xmit_size;
1236         ret = info->xmit_size - info->xmit_count;
1237         return (ret < 0) ? 0 : ret;
1238 }
1239
1240 static int
1241 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1242 {
1243         modem_info *info = (modem_info *) tty->driver_data;
1244
1245         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1246                 return 0;
1247         if (!info->online)
1248                 return 0;
1249         return (info->xmit_count);
1250 }
1251
1252 static void
1253 isdn_tty_flush_buffer(struct tty_struct *tty)
1254 {
1255         modem_info *info;
1256
1257         if (!tty) {
1258                 return;
1259         }
1260         info = (modem_info *) tty->driver_data;
1261         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1262                 return;
1263         }
1264         isdn_tty_cleanup_xmit(info);
1265         info->xmit_count = 0;
1266         tty_wakeup(tty);
1267 }
1268
1269 static void
1270 isdn_tty_flush_chars(struct tty_struct *tty)
1271 {
1272         modem_info *info = (modem_info *) tty->driver_data;
1273
1274         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1275                 return;
1276         if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1277                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1278 }
1279
1280 /*
1281  * ------------------------------------------------------------
1282  * isdn_tty_throttle()
1283  *
1284  * This routine is called by the upper-layer tty layer to signal that
1285  * incoming characters should be throttled.
1286  * ------------------------------------------------------------
1287  */
1288 static void
1289 isdn_tty_throttle(struct tty_struct *tty)
1290 {
1291         modem_info *info = (modem_info *) tty->driver_data;
1292
1293         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1294                 return;
1295         if (I_IXOFF(tty))
1296                 info->x_char = STOP_CHAR(tty);
1297         info->mcr &= ~UART_MCR_RTS;
1298 }
1299
1300 static void
1301 isdn_tty_unthrottle(struct tty_struct *tty)
1302 {
1303         modem_info *info = (modem_info *) tty->driver_data;
1304
1305         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1306                 return;
1307         if (I_IXOFF(tty)) {
1308                 if (info->x_char)
1309                         info->x_char = 0;
1310                 else
1311                         info->x_char = START_CHAR(tty);
1312         }
1313         info->mcr |= UART_MCR_RTS;
1314 }
1315
1316 /*
1317  * ------------------------------------------------------------
1318  * isdn_tty_ioctl() and friends
1319  * ------------------------------------------------------------
1320  */
1321
1322 /*
1323  * isdn_tty_get_lsr_info - get line status register info
1324  *
1325  * Purpose: Let user call ioctl() to get info when the UART physically
1326  *          is emptied.  On bus types like RS485, the transmitter must
1327  *          release the bus after transmitting. This must be done when
1328  *          the transmit shift register is empty, not be done when the
1329  *          transmit holding register is empty.  This functionality
1330  *          allows RS485 driver to be written in user space.
1331  */
1332 static int
1333 isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1334 {
1335         u_char status;
1336         uint result;
1337
1338         status = info->lsr;
1339         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1340         return put_user(result, value);
1341 }
1342
1343
1344 static int
1345 isdn_tty_tiocmget(struct tty_struct *tty, struct file *file)
1346 {
1347         modem_info *info = (modem_info *) tty->driver_data;
1348         u_char control, status;
1349
1350         if (isdn_tty_paranoia_check(info, tty->name, __func__))
1351                 return -ENODEV;
1352         if (tty->flags & (1 << TTY_IO_ERROR))
1353                 return -EIO;
1354
1355         lock_kernel();
1356 #ifdef ISDN_DEBUG_MODEM_IOCTL
1357         printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1358 #endif
1359
1360         control = info->mcr;
1361         status = info->msr;
1362         unlock_kernel();
1363         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1364             | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1365             | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1366             | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1367             | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1368             | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1369 }
1370
1371 static int
1372 isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
1373                 unsigned int set, unsigned int clear)
1374 {
1375         modem_info *info = (modem_info *) tty->driver_data;
1376
1377         if (isdn_tty_paranoia_check(info, tty->name, __func__))
1378                 return -ENODEV;
1379         if (tty->flags & (1 << TTY_IO_ERROR))
1380                 return -EIO;
1381
1382 #ifdef ISDN_DEBUG_MODEM_IOCTL
1383         printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1384 #endif
1385
1386         lock_kernel();
1387         if (set & TIOCM_RTS)
1388                 info->mcr |= UART_MCR_RTS;
1389         if (set & TIOCM_DTR) {
1390                 info->mcr |= UART_MCR_DTR;
1391                 isdn_tty_modem_ncarrier(info);
1392         }
1393
1394         if (clear & TIOCM_RTS)
1395                 info->mcr &= ~UART_MCR_RTS;
1396         if (clear & TIOCM_DTR) {
1397                 info->mcr &= ~UART_MCR_DTR;
1398                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1399                         isdn_tty_modem_reset_regs(info, 0);
1400 #ifdef ISDN_DEBUG_MODEM_HUP
1401                         printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1402 #endif
1403                         if (info->online)
1404                                 info->ncarrier = 1;
1405                         isdn_tty_modem_hup(info, 1);
1406                 }
1407         }
1408         unlock_kernel();
1409         return 0;
1410 }
1411
1412 static int
1413 isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
1414                uint cmd, ulong arg)
1415 {
1416         modem_info *info = (modem_info *) tty->driver_data;
1417         int retval;
1418
1419         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1420                 return -ENODEV;
1421         if (tty->flags & (1 << TTY_IO_ERROR))
1422                 return -EIO;
1423         switch (cmd) {
1424                 case TCSBRK:   /* SVID version: non-zero arg --> no break */
1425 #ifdef ISDN_DEBUG_MODEM_IOCTL
1426                         printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1427 #endif
1428                         retval = tty_check_change(tty);
1429                         if (retval)
1430                                 return retval;
1431                         tty_wait_until_sent(tty, 0);
1432                         return 0;
1433                 case TCSBRKP:  /* support for POSIX tcsendbreak() */
1434 #ifdef ISDN_DEBUG_MODEM_IOCTL
1435                         printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1436 #endif
1437                         retval = tty_check_change(tty);
1438                         if (retval)
1439                                 return retval;
1440                         tty_wait_until_sent(tty, 0);
1441                         return 0;
1442                 case TIOCSERGETLSR:     /* Get line status register */
1443 #ifdef ISDN_DEBUG_MODEM_IOCTL
1444                         printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1445 #endif
1446                         return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1447                 default:
1448 #ifdef ISDN_DEBUG_MODEM_IOCTL
1449                         printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1450 #endif
1451                         return -ENOIOCTLCMD;
1452         }
1453         return 0;
1454 }
1455
1456 static void
1457 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1458 {
1459         modem_info *info = (modem_info *) tty->driver_data;
1460
1461         if (!old_termios)
1462                 isdn_tty_change_speed(info);
1463         else {
1464                 if (tty->termios->c_cflag == old_termios->c_cflag &&
1465                     tty->termios->c_ispeed == old_termios->c_ispeed &&
1466                     tty->termios->c_ospeed == old_termios->c_ospeed)
1467                         return;
1468                 isdn_tty_change_speed(info);
1469                 if ((old_termios->c_cflag & CRTSCTS) &&
1470                     !(tty->termios->c_cflag & CRTSCTS))
1471                         tty->hw_stopped = 0;
1472         }
1473 }
1474
1475 /*
1476  * ------------------------------------------------------------
1477  * isdn_tty_open() and friends
1478  * ------------------------------------------------------------
1479  */
1480 static int
1481 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1482 {
1483         DECLARE_WAITQUEUE(wait, NULL);
1484         int do_clocal = 0;
1485         int retval;
1486
1487         /*
1488          * If the device is in the middle of being closed, then block
1489          * until it's done, and then try again.
1490          */
1491         if (tty_hung_up_p(filp) ||
1492             (info->flags & ISDN_ASYNC_CLOSING)) {
1493                 if (info->flags & ISDN_ASYNC_CLOSING)
1494                         interruptible_sleep_on(&info->close_wait);
1495 #ifdef MODEM_DO_RESTART
1496                 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1497                         return -EAGAIN;
1498                 else
1499                         return -ERESTARTSYS;
1500 #else
1501                 return -EAGAIN;
1502 #endif
1503         }
1504         /*
1505          * If non-blocking mode is set, then make the check up front
1506          * and then exit.
1507          */
1508         if ((filp->f_flags & O_NONBLOCK) ||
1509             (tty->flags & (1 << TTY_IO_ERROR))) {
1510                 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1511                         return -EBUSY;
1512                 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1513                 return 0;
1514         }
1515         if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1516                 if (info->normal_termios.c_cflag & CLOCAL)
1517                         do_clocal = 1;
1518         } else {
1519                 if (tty->termios->c_cflag & CLOCAL)
1520                         do_clocal = 1;
1521         }
1522         /*
1523          * Block waiting for the carrier detect and the line to become
1524          * free (i.e., not in use by the callout).  While we are in
1525          * this loop, info->count is dropped by one, so that
1526          * isdn_tty_close() knows when to free things.  We restore it upon
1527          * exit, either normal or abnormal.
1528          */
1529         retval = 0;
1530         add_wait_queue(&info->open_wait, &wait);
1531 #ifdef ISDN_DEBUG_MODEM_OPEN
1532         printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1533                info->line, info->count);
1534 #endif
1535         if (!(tty_hung_up_p(filp)))
1536                 info->count--;
1537         info->blocked_open++;
1538         while (1) {
1539                 set_current_state(TASK_INTERRUPTIBLE);
1540                 if (tty_hung_up_p(filp) ||
1541                     !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1542 #ifdef MODEM_DO_RESTART
1543                         if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1544                                 retval = -EAGAIN;
1545                         else
1546                                 retval = -ERESTARTSYS;
1547 #else
1548                         retval = -EAGAIN;
1549 #endif
1550                         break;
1551                 }
1552                 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1553                     !(info->flags & ISDN_ASYNC_CLOSING) &&
1554                     (do_clocal || (info->msr & UART_MSR_DCD))) {
1555                         break;
1556                 }
1557                 if (signal_pending(current)) {
1558                         retval = -ERESTARTSYS;
1559                         break;
1560                 }
1561 #ifdef ISDN_DEBUG_MODEM_OPEN
1562                 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1563                        info->line, info->count);
1564 #endif
1565                 schedule();
1566         }
1567         current->state = TASK_RUNNING;
1568         remove_wait_queue(&info->open_wait, &wait);
1569         if (!tty_hung_up_p(filp))
1570                 info->count++;
1571         info->blocked_open--;
1572 #ifdef ISDN_DEBUG_MODEM_OPEN
1573         printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1574                info->line, info->count);
1575 #endif
1576         if (retval)
1577                 return retval;
1578         info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1579         return 0;
1580 }
1581
1582 /*
1583  * This routine is called whenever a serial port is opened.  It
1584  * enables interrupts for a serial port, linking in its async structure into
1585  * the IRQ chain.   It also performs the serial-specific
1586  * initialization for the tty structure.
1587  */
1588 static int
1589 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1590 {
1591         modem_info *info;
1592         int retval, line;
1593
1594         line = tty->index;
1595         if (line < 0 || line > ISDN_MAX_CHANNELS)
1596                 return -ENODEV;
1597         info = &dev->mdm.info[line];
1598         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1599                 return -ENODEV;
1600         if (!try_module_get(info->owner)) {
1601                 printk(KERN_WARNING "%s: cannot reserve module\n", __func__);
1602                 return -ENODEV;
1603         }
1604 #ifdef ISDN_DEBUG_MODEM_OPEN
1605         printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1606                info->count);
1607 #endif
1608         info->count++;
1609         tty->driver_data = info;
1610         info->tty = tty;
1611         /*
1612          * Start up serial port
1613          */
1614         retval = isdn_tty_startup(info);
1615         if (retval) {
1616 #ifdef ISDN_DEBUG_MODEM_OPEN
1617                 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1618 #endif
1619                 module_put(info->owner);
1620                 return retval;
1621         }
1622         retval = isdn_tty_block_til_ready(tty, filp, info);
1623         if (retval) {
1624 #ifdef ISDN_DEBUG_MODEM_OPEN
1625                 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1626 #endif
1627                 module_put(info->owner);
1628                 return retval;
1629         }
1630 #ifdef ISDN_DEBUG_MODEM_OPEN
1631         printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1632 #endif
1633         dev->modempoll++;
1634 #ifdef ISDN_DEBUG_MODEM_OPEN
1635         printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1636 #endif
1637         return 0;
1638 }
1639
1640 static void
1641 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1642 {
1643         modem_info *info = (modem_info *) tty->driver_data;
1644         ulong timeout;
1645
1646         if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1647                 return;
1648         if (tty_hung_up_p(filp)) {
1649 #ifdef ISDN_DEBUG_MODEM_OPEN
1650                 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1651 #endif
1652                 return;
1653         }
1654         if ((tty->count == 1) && (info->count != 1)) {
1655                 /*
1656                  * Uh, oh.  tty->count is 1, which means that the tty
1657                  * structure will be freed.  Info->count should always
1658                  * be one in these conditions.  If it's greater than
1659                  * one, we've got real problems, since it means the
1660                  * serial port won't be shutdown.
1661                  */
1662                 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1663                        "info->count is %d\n", info->count);
1664                 info->count = 1;
1665         }
1666         if (--info->count < 0) {
1667                 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1668                        info->line, info->count);
1669                 info->count = 0;
1670         }
1671         if (info->count) {
1672 #ifdef ISDN_DEBUG_MODEM_OPEN
1673                 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1674 #endif
1675                 module_put(info->owner);
1676                 return;
1677         }
1678         info->flags |= ISDN_ASYNC_CLOSING;
1679         /*
1680          * Save the termios structure, since this port may have
1681          * separate termios for callout and dialin.
1682          */
1683         if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1684                 info->normal_termios = *tty->termios;
1685         if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1686                 info->callout_termios = *tty->termios;
1687
1688         tty->closing = 1;
1689         /*
1690          * At this point we stop accepting input.  To do this, we
1691          * disable the receive line status interrupts, and tell the
1692          * interrupt driver to stop checking the data ready bit in the
1693          * line status register.
1694          */
1695         if (info->flags & ISDN_ASYNC_INITIALIZED) {
1696                 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1697                 /*
1698                  * Before we drop DTR, make sure the UART transmitter
1699                  * has completely drained; this is especially
1700                  * important if there is a transmit FIFO!
1701                  */
1702                 timeout = jiffies + HZ;
1703                 while (!(info->lsr & UART_LSR_TEMT)) {
1704                         schedule_timeout_interruptible(20);
1705                         if (time_after(jiffies,timeout))
1706                                 break;
1707                 }
1708         }
1709         dev->modempoll--;
1710         isdn_tty_shutdown(info);
1711
1712         if (tty->driver->flush_buffer)
1713                 tty->driver->flush_buffer(tty);
1714         tty_ldisc_flush(tty);
1715         info->tty = NULL;
1716         info->ncarrier = 0;
1717         tty->closing = 0;
1718         module_put(info->owner);
1719         if (info->blocked_open) {
1720                 msleep_interruptible(500);
1721                 wake_up_interruptible(&info->open_wait);
1722         }
1723         info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1724         wake_up_interruptible(&info->close_wait);
1725 #ifdef ISDN_DEBUG_MODEM_OPEN
1726         printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1727 #endif
1728 }
1729
1730 /*
1731  * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1732  */
1733 static void
1734 isdn_tty_hangup(struct tty_struct *tty)
1735 {
1736         modem_info *info = (modem_info *) tty->driver_data;
1737
1738         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1739                 return;
1740         isdn_tty_shutdown(info);
1741         info->count = 0;
1742         info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1743         info->tty = NULL;
1744         wake_up_interruptible(&info->open_wait);
1745 }
1746
1747 /* This routine initializes all emulator-data.
1748  */
1749 static void
1750 isdn_tty_reset_profile(atemu * m)
1751 {
1752         m->profile[0] = 0;
1753         m->profile[1] = 0;
1754         m->profile[2] = 43;
1755         m->profile[3] = 13;
1756         m->profile[4] = 10;
1757         m->profile[5] = 8;
1758         m->profile[6] = 3;
1759         m->profile[7] = 60;
1760         m->profile[8] = 2;
1761         m->profile[9] = 6;
1762         m->profile[10] = 7;
1763         m->profile[11] = 70;
1764         m->profile[12] = 0x45;
1765         m->profile[13] = 4;
1766         m->profile[14] = ISDN_PROTO_L2_X75I;
1767         m->profile[15] = ISDN_PROTO_L3_TRANS;
1768         m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1769         m->profile[17] = ISDN_MODEM_WINSIZE;
1770         m->profile[18] = 4;
1771         m->profile[19] = 0;
1772         m->profile[20] = 0;
1773         m->profile[23] = 0;
1774         m->pmsn[0] = '\0';
1775         m->plmsn[0] = '\0';
1776 }
1777
1778 #ifdef CONFIG_ISDN_AUDIO
1779 static void
1780 isdn_tty_modem_reset_vpar(atemu * m)
1781 {
1782         m->vpar[0] = 2;         /* Voice-device            (2 = phone line) */
1783         m->vpar[1] = 0;         /* Silence detection level (0 = none      ) */
1784         m->vpar[2] = 70;        /* Silence interval        (7 sec.        ) */
1785         m->vpar[3] = 2;         /* Compression type        (1 = ADPCM-2   ) */
1786         m->vpar[4] = 0;         /* DTMF detection level    (0 = softcode  ) */
1787         m->vpar[5] = 8;         /* DTMF interval           (8 * 5 ms.     ) */
1788 }
1789 #endif
1790
1791 #ifdef CONFIG_ISDN_TTY_FAX
1792 static void
1793 isdn_tty_modem_reset_faxpar(modem_info * info)
1794 {
1795         T30_s *f = info->fax;
1796
1797         f->code = 0;
1798         f->phase = ISDN_FAX_PHASE_IDLE;
1799         f->direction = 0;
1800         f->resolution = 1;      /* fine */
1801         f->rate = 5;            /* 14400 bit/s */
1802         f->width = 0;
1803         f->length = 0;
1804         f->compression = 0;
1805         f->ecm = 0;
1806         f->binary = 0;
1807         f->scantime = 0;
1808         memset(&f->id[0], 32, FAXIDLEN - 1);
1809         f->id[FAXIDLEN - 1] = 0;
1810         f->badlin = 0;
1811         f->badmul = 0;
1812         f->bor = 0;
1813         f->nbc = 0;
1814         f->cq = 0;
1815         f->cr = 0;
1816         f->ctcrty = 0;
1817         f->minsp = 0;
1818         f->phcto = 30;
1819         f->rel = 0;
1820         memset(&f->pollid[0], 32, FAXIDLEN - 1);
1821         f->pollid[FAXIDLEN - 1] = 0;
1822 }
1823 #endif
1824
1825 static void
1826 isdn_tty_modem_reset_regs(modem_info * info, int force)
1827 {
1828         atemu *m = &info->emu;
1829         if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1830                 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1831                 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1832                 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1833                 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1834         }
1835 #ifdef CONFIG_ISDN_AUDIO
1836         isdn_tty_modem_reset_vpar(m);
1837 #endif
1838 #ifdef CONFIG_ISDN_TTY_FAX
1839         isdn_tty_modem_reset_faxpar(info);
1840 #endif
1841         m->mdmcmdl = 0;
1842 }
1843
1844 static void
1845 modem_write_profile(atemu * m)
1846 {
1847         memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1848         memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1849         memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1850         if (dev->profd)
1851                 send_sig(SIGIO, dev->profd, 1);
1852 }
1853
1854 static const struct tty_operations modem_ops = {
1855         .open = isdn_tty_open,
1856         .close = isdn_tty_close,
1857         .write = isdn_tty_write,
1858         .flush_chars = isdn_tty_flush_chars,
1859         .write_room = isdn_tty_write_room,
1860         .chars_in_buffer = isdn_tty_chars_in_buffer,
1861         .flush_buffer = isdn_tty_flush_buffer,
1862         .ioctl = isdn_tty_ioctl,
1863         .throttle = isdn_tty_throttle,
1864         .unthrottle = isdn_tty_unthrottle,
1865         .set_termios = isdn_tty_set_termios,
1866         .hangup = isdn_tty_hangup,
1867         .tiocmget = isdn_tty_tiocmget,
1868         .tiocmset = isdn_tty_tiocmset,
1869 };
1870
1871 int
1872 isdn_tty_modem_init(void)
1873 {
1874         isdn_modem_t    *m;
1875         int             i, retval;
1876         modem_info      *info;
1877
1878         m = &dev->mdm;
1879         m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1880         if (!m->tty_modem)
1881                 return -ENOMEM;
1882         m->tty_modem->name = "ttyI";
1883         m->tty_modem->major = ISDN_TTY_MAJOR;
1884         m->tty_modem->minor_start = 0;
1885         m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1886         m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1887         m->tty_modem->init_termios = tty_std_termios;
1888         m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1889         m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1890         m->tty_modem->driver_name = "isdn_tty";
1891         tty_set_operations(m->tty_modem, &modem_ops);
1892         retval = tty_register_driver(m->tty_modem);
1893         if (retval) {
1894                 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1895                 goto err;
1896         }
1897         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1898                 info = &m->info[i];
1899 #ifdef CONFIG_ISDN_TTY_FAX
1900                 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1901                         printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1902                         retval = -ENOMEM;
1903                         goto err_unregister;
1904                 }
1905 #endif
1906 #ifdef MODULE
1907                 info->owner = THIS_MODULE;
1908 #endif
1909                 spin_lock_init(&info->readlock);
1910                 sprintf(info->last_cause, "0000");
1911                 sprintf(info->last_num, "none");
1912                 info->last_dir = 0;
1913                 info->last_lhup = 1;
1914                 info->last_l2 = -1;
1915                 info->last_si = 0;
1916                 isdn_tty_reset_profile(&info->emu);
1917                 isdn_tty_modem_reset_regs(info, 1);
1918                 info->magic = ISDN_ASYNC_MAGIC;
1919                 info->line = i;
1920                 info->tty = NULL;
1921                 info->x_char = 0;
1922                 info->count = 0;
1923                 info->blocked_open = 0;
1924                 init_waitqueue_head(&info->open_wait);
1925                 init_waitqueue_head(&info->close_wait);
1926                 info->isdn_driver = -1;
1927                 info->isdn_channel = -1;
1928                 info->drv_index = -1;
1929                 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1930                 init_timer(&info->nc_timer);
1931                 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1932                 info->nc_timer.data = (unsigned long) info;
1933                 skb_queue_head_init(&info->xmit_queue);
1934 #ifdef CONFIG_ISDN_AUDIO
1935                 skb_queue_head_init(&info->dtmf_queue);
1936 #endif
1937                 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1938                         printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1939                         retval = -ENOMEM;
1940                         goto err_unregister;
1941                 }
1942                 /* Make room for T.70 header */
1943                 info->xmit_buf += 4;
1944         }
1945         return 0;
1946 err_unregister:
1947         for (i--; i >= 0; i--) {
1948                 info = &m->info[i];
1949 #ifdef CONFIG_ISDN_TTY_FAX
1950                 kfree(info->fax);
1951 #endif
1952                 kfree(info->xmit_buf - 4);
1953         }
1954         tty_unregister_driver(m->tty_modem);
1955  err:
1956         put_tty_driver(m->tty_modem);
1957         m->tty_modem = NULL;
1958         return retval;
1959 }
1960
1961 void
1962 isdn_tty_exit(void)
1963 {
1964         modem_info *info;
1965         int i;
1966
1967         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1968                 info = &dev->mdm.info[i];
1969                 isdn_tty_cleanup_xmit(info);
1970 #ifdef CONFIG_ISDN_TTY_FAX
1971                 kfree(info->fax);
1972 #endif
1973                 kfree(info->xmit_buf - 4);
1974         }
1975         tty_unregister_driver(dev->mdm.tty_modem);
1976         put_tty_driver(dev->mdm.tty_modem);
1977         dev->mdm.tty_modem = NULL;
1978 }
1979
1980
1981 /*
1982  * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1983  *      match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1984  *      and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1985  */
1986
1987 static int
1988 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1989 {
1990 #ifdef ISDN_DEBUG_MODEM_ICALL
1991         printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1992                emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1993                emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1994 #endif
1995         if (strlen(emu->lmsn)) {
1996                 char *p = emu->lmsn;
1997                 char *q;
1998                 int  tmp;
1999                 int  ret = 0;
2000
2001                 while (1) {
2002                         if ((q = strchr(p, ';')))
2003                                 *q = '\0';
2004                         if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2005                                 ret = tmp;
2006 #ifdef ISDN_DEBUG_MODEM_ICALL
2007                         printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2008                                p, isdn_map_eaz2msn(emu->msn, di), tmp);
2009 #endif
2010                         if (q) {
2011                                 *q = ';';
2012                                 p = q;
2013                                 p++;
2014                         }
2015                         if (!tmp)
2016                                 return 0;
2017                         if (!q)
2018                                 break;
2019                 }
2020                 return ret;
2021         } else {
2022                 int tmp;
2023                 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2024 #ifdef ISDN_DEBUG_MODEM_ICALL
2025                         printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2026                                isdn_map_eaz2msn(emu->msn, di), tmp);
2027 #endif
2028                 return tmp;
2029         }
2030 }
2031
2032 /*
2033  * An incoming call-request has arrived.
2034  * Search the tty-devices for an appropriate device and bind
2035  * it to the ISDN-Channel.
2036  * Return:
2037  *
2038  *  0 = No matching device found.
2039  *  1 = A matching device found.
2040  *  3 = No match found, but eventually would match, if
2041  *      CID is longer.
2042  */
2043 int
2044 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2045 {
2046         char *eaz;
2047         int i;
2048         int wret;
2049         int idx;
2050         int si1;
2051         int si2;
2052         char *nr;
2053         ulong flags;
2054
2055         if (!setup->phone[0]) {
2056                 nr = "0";
2057                 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2058         } else
2059                 nr = setup->phone;
2060         si1 = (int) setup->si1;
2061         si2 = (int) setup->si2;
2062         if (!setup->eazmsn[0]) {
2063                 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2064                 eaz = "0";
2065         } else
2066                 eaz = setup->eazmsn;
2067 #ifdef ISDN_DEBUG_MODEM_ICALL
2068         printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2069 #endif
2070         wret = 0;
2071         spin_lock_irqsave(&dev->lock, flags);
2072         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2073                 modem_info *info = &dev->mdm.info[i];
2074
2075                 if (info->count == 0)
2076                     continue;
2077                 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) &&  /* SI1 is matching */
2078                     (info->emu.mdmreg[REG_SI2] == si2)) {         /* SI2 is matching */
2079                         idx = isdn_dc2minor(di, ch);
2080 #ifdef ISDN_DEBUG_MODEM_ICALL
2081                         printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2082                         printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2083                                info->flags, info->isdn_driver, info->isdn_channel,
2084                                dev->usage[idx]);
2085 #endif
2086                         if (
2087 #ifndef FIX_FILE_TRANSFER
2088                                 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2089 #endif
2090                                 (info->isdn_driver == -1) &&
2091                                 (info->isdn_channel == -1) &&
2092                                 (USG_NONE(dev->usage[idx]))) {
2093                                 int matchret;
2094
2095                                 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2096                                         wret = matchret;
2097                                 if (!matchret) {                  /* EAZ is matching */
2098                                         info->isdn_driver = di;
2099                                         info->isdn_channel = ch;
2100                                         info->drv_index = idx;
2101                                         dev->m_idx[idx] = info->line;
2102                                         dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2103                                         dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2104                                         strcpy(dev->num[idx], nr);
2105                                         strcpy(info->emu.cpn, eaz);
2106                                         info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2107                                         info->emu.mdmreg[REG_PLAN] = setup->plan;
2108                                         info->emu.mdmreg[REG_SCREEN] = setup->screen;
2109                                         isdn_info_update();
2110                                         spin_unlock_irqrestore(&dev->lock, flags);
2111                                         printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2112                                                info->line);
2113                                         info->msr |= UART_MSR_RI;
2114                                         isdn_tty_modem_result(RESULT_RING, info);
2115                                         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2116                                         return 1;
2117                                 }
2118                         }
2119                 }
2120         }
2121         spin_unlock_irqrestore(&dev->lock, flags);
2122         printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2123                ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2124         return (wret == 2)?3:0;
2125 }
2126
2127 #define TTY_IS_ACTIVE(info) \
2128         (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2129
2130 int
2131 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2132 {
2133         int mi;
2134         modem_info *info;
2135         char *e;
2136
2137         if (i < 0)
2138                 return 0;
2139         if ((mi = dev->m_idx[i]) >= 0) {
2140                 info = &dev->mdm.info[mi];
2141                 switch (c->command) {
2142                         case ISDN_STAT_CINF:
2143                                 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2144                                 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2145                                 if (e == (char *)c->parm.num)
2146                                         info->emu.charge = 0;
2147
2148                                 break;
2149                         case ISDN_STAT_BSENT:
2150 #ifdef ISDN_TTY_STAT_DEBUG
2151                                 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2152 #endif
2153                                 if ((info->isdn_driver == c->driver) &&
2154                                     (info->isdn_channel == c->arg)) {
2155                                         info->msr |= UART_MSR_CTS;
2156                                         if (info->send_outstanding)
2157                                                 if (!(--info->send_outstanding))
2158                                                         info->lsr |= UART_LSR_TEMT;
2159                                         isdn_tty_tint(info);
2160                                         return 1;
2161                                 }
2162                                 break;
2163                         case ISDN_STAT_CAUSE:
2164 #ifdef ISDN_TTY_STAT_DEBUG
2165                                 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2166 #endif
2167                                 /* Signal cause to tty-device */
2168                                 strncpy(info->last_cause, c->parm.num, 5);
2169                                 return 1;
2170                         case ISDN_STAT_DISPLAY:
2171 #ifdef ISDN_TTY_STAT_DEBUG
2172                                 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2173 #endif
2174                                 /* Signal display to tty-device */
2175                                 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2176                                         !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2177                                   isdn_tty_at_cout("\r\n", info);
2178                                   isdn_tty_at_cout("DISPLAY: ", info);
2179                                   isdn_tty_at_cout(c->parm.display, info);
2180                                   isdn_tty_at_cout("\r\n", info);
2181                                 }
2182                                 return 1;
2183                         case ISDN_STAT_DCONN:
2184 #ifdef ISDN_TTY_STAT_DEBUG
2185                                 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2186 #endif
2187                                 if (TTY_IS_ACTIVE(info)) {
2188                                         if (info->dialing == 1) {
2189                                                 info->dialing = 2;
2190                                                 return 1;
2191                                         }
2192                                 }
2193                                 break;
2194                         case ISDN_STAT_DHUP:
2195 #ifdef ISDN_TTY_STAT_DEBUG
2196                                 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2197 #endif
2198                                 if (TTY_IS_ACTIVE(info)) {
2199                                         if (info->dialing == 1)
2200                                                 isdn_tty_modem_result(RESULT_BUSY, info);
2201                                         if (info->dialing > 1)
2202                                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2203                                         info->dialing = 0;
2204 #ifdef ISDN_DEBUG_MODEM_HUP
2205                                         printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2206 #endif
2207                                         isdn_tty_modem_hup(info, 0);
2208                                         return 1;
2209                                 }
2210                                 break;
2211                         case ISDN_STAT_BCONN:
2212 #ifdef ISDN_TTY_STAT_DEBUG
2213                                 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2214 #endif
2215                                 /* Wake up any processes waiting
2216                                  * for incoming call of this device when
2217                                  * DCD follow the state of incoming carrier
2218                                  */
2219                                 if (info->blocked_open &&
2220                                    (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2221                                         wake_up_interruptible(&info->open_wait);
2222                                 }
2223
2224                                 /* Schedule CONNECT-Message to any tty
2225                                  * waiting for it and
2226                                  * set DCD-bit of its modem-status.
2227                                  */
2228                                 if (TTY_IS_ACTIVE(info) ||
2229                                     (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2230                                         info->msr |= UART_MSR_DCD;
2231                                         info->emu.charge = 0;
2232                                         if (info->dialing & 0xf)
2233                                                 info->last_dir = 1;
2234                                         else
2235                                                 info->last_dir = 0;
2236                                         info->dialing = 0;
2237                                         info->rcvsched = 1;
2238                                         if (USG_MODEM(dev->usage[i])) {
2239                                                 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2240                                                         strcpy(info->emu.connmsg, c->parm.num);
2241                                                         isdn_tty_modem_result(RESULT_CONNECT, info);
2242                                                 } else
2243                                                         isdn_tty_modem_result(RESULT_CONNECT64000, info);
2244                                         }
2245                                         if (USG_VOICE(dev->usage[i]))
2246                                                 isdn_tty_modem_result(RESULT_VCON, info);
2247                                         return 1;
2248                                 }
2249                                 break;
2250                         case ISDN_STAT_BHUP:
2251 #ifdef ISDN_TTY_STAT_DEBUG
2252                                 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2253 #endif
2254                                 if (TTY_IS_ACTIVE(info)) {
2255 #ifdef ISDN_DEBUG_MODEM_HUP
2256                                         printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2257 #endif
2258                                         isdn_tty_modem_hup(info, 0);
2259                                         return 1;
2260                                 }
2261                                 break;
2262                         case ISDN_STAT_NODCH:
2263 #ifdef ISDN_TTY_STAT_DEBUG
2264                                 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2265 #endif
2266                                 if (TTY_IS_ACTIVE(info)) {
2267                                         if (info->dialing) {
2268                                                 info->dialing = 0;
2269                                                 info->last_l2 = -1;
2270                                                 info->last_si = 0;
2271                                                 sprintf(info->last_cause, "0000");
2272                                                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2273                                         }
2274                                         isdn_tty_modem_hup(info, 0);
2275                                         return 1;
2276                                 }
2277                                 break;
2278                         case ISDN_STAT_UNLOAD:
2279 #ifdef ISDN_TTY_STAT_DEBUG
2280                                 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2281 #endif
2282                                 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2283                                         info = &dev->mdm.info[i];
2284                                         if (info->isdn_driver == c->driver) {
2285                                                 if (info->online)
2286                                                         isdn_tty_modem_hup(info, 1);
2287                                         }
2288                                 }
2289                                 return 1;
2290 #ifdef CONFIG_ISDN_TTY_FAX
2291                         case ISDN_STAT_FAXIND:
2292                                 if (TTY_IS_ACTIVE(info)) {
2293                                         isdn_tty_fax_command(info, c);
2294                                 }
2295                                 break;
2296 #endif
2297 #ifdef CONFIG_ISDN_AUDIO
2298                         case ISDN_STAT_AUDIO:
2299                                 if (TTY_IS_ACTIVE(info)) {
2300                                         switch(c->parm.num[0]) {
2301                                                 case ISDN_AUDIO_DTMF:
2302                                                         if (info->vonline) {
2303                                                                 isdn_audio_put_dle_code(info,
2304                                                                         c->parm.num[1]);
2305                                                         }
2306                                                         break;
2307                                         }
2308                                 }
2309                                 break;
2310 #endif
2311                 }
2312         }
2313         return 0;
2314 }
2315
2316 /*********************************************************************
2317  Modem-Emulator-Routines
2318  *********************************************************************/
2319
2320 #define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2321
2322 /*
2323  * Put a message from the AT-emulator into receive-buffer of tty,
2324  * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2325  */
2326 void
2327 isdn_tty_at_cout(char *msg, modem_info * info)
2328 {
2329         struct tty_struct *tty;
2330         atemu *m = &info->emu;
2331         char *p;
2332         char c;
2333         u_long flags;
2334         struct sk_buff *skb = NULL;
2335         char *sp = NULL;
2336         int l;
2337
2338         if (!msg) {
2339                 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2340                 return;
2341         }
2342
2343         l = strlen(msg);
2344
2345         spin_lock_irqsave(&info->readlock, flags);
2346         tty = info->tty;
2347         if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2348                 spin_unlock_irqrestore(&info->readlock, flags);
2349                 return;
2350         }
2351
2352         /* use queue instead of direct, if online and */
2353         /* data is in queue or buffer is full */
2354         if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2355             !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2356                 skb = alloc_skb(l, GFP_ATOMIC);
2357                 if (!skb) {
2358                         spin_unlock_irqrestore(&info->readlock, flags);
2359                         return;
2360                 }
2361                 sp = skb_put(skb, l);
2362 #ifdef CONFIG_ISDN_AUDIO
2363                 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2364                 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2365 #endif
2366         }
2367
2368         for (p = msg; *p; p++) {
2369                 switch (*p) {
2370                         case '\r':
2371                                 c = m->mdmreg[REG_CR];
2372                                 break;
2373                         case '\n':
2374                                 c = m->mdmreg[REG_LF];
2375                                 break;
2376                         case '\b':
2377                                 c = m->mdmreg[REG_BS];
2378                                 break;
2379                         default:
2380                                 c = *p;
2381                 }
2382                 if (skb) {
2383                         *sp++ = c;
2384                 } else {
2385                         if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
2386                                 break;
2387                 }
2388         }
2389         if (skb) {
2390                 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2391                 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2392                 spin_unlock_irqrestore(&info->readlock, flags);
2393                 /* Schedule dequeuing */
2394                 if (dev->modempoll && info->rcvsched)
2395                         isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2396
2397         } else {
2398                 spin_unlock_irqrestore(&info->readlock, flags);
2399                 tty_flip_buffer_push(tty);
2400         }
2401 }
2402
2403 /*
2404  * Perform ATH Hangup
2405  */
2406 static void
2407 isdn_tty_on_hook(modem_info * info)
2408 {
2409         if (info->isdn_channel >= 0) {
2410 #ifdef ISDN_DEBUG_MODEM_HUP
2411                 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2412 #endif
2413                 isdn_tty_modem_hup(info, 1);
2414         }
2415 }
2416
2417 static void
2418 isdn_tty_off_hook(void)
2419 {
2420         printk(KERN_DEBUG "isdn_tty_off_hook\n");
2421 }
2422
2423 #define PLUSWAIT1 (HZ/2)        /* 0.5 sec. */
2424 #define PLUSWAIT2 (HZ*3/2)      /* 1.5 sec */
2425
2426 /*
2427  * Check Buffer for Modem-escape-sequence, activate timer-callback to
2428  * isdn_tty_modem_escape() if sequence found.
2429  *
2430  * Parameters:
2431  *   p          pointer to databuffer
2432  *   plus       escape-character
2433  *   count      length of buffer
2434  *   pluscount  count of valid escape-characters so far
2435  *   lastplus   timestamp of last character
2436  */
2437 static void
2438 isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2439                    u_long *lastplus)
2440 {
2441         if (plus > 127)
2442                 return;
2443         if (count > 3) {
2444                 p += count - 3;
2445                 count = 3;
2446                 *pluscount = 0;
2447         }
2448         while (count > 0) {
2449                 if (*(p++) == plus) {
2450                         if ((*pluscount)++) {
2451                                 /* Time since last '+' > 0.5 sec. ? */
2452                                 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2453                                         *pluscount = 1;
2454                         } else {
2455                                 /* Time since last non-'+' < 1.5 sec. ? */
2456                                 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2457                                         *pluscount = 0;
2458                         }
2459                         if ((*pluscount == 3) && (count == 1))
2460                                 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2461                         if (*pluscount > 3)
2462                                 *pluscount = 1;
2463                 } else
2464                         *pluscount = 0;
2465                 *lastplus = jiffies;
2466                 count--;
2467         }
2468 }
2469
2470 /*
2471  * Return result of AT-emulator to tty-receive-buffer, depending on
2472  * modem-register 12, bit 0 and 1.
2473  * For CONNECT-messages also switch to online-mode.
2474  * For RING-message handle auto-ATA if register 0 != 0
2475  */
2476
2477 static void
2478 isdn_tty_modem_result(int code, modem_info * info)
2479 {
2480         atemu *m = &info->emu;
2481         static char *msg[] =
2482         {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2483          "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2484          "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2485         char s[ISDN_MSNLEN+10];
2486
2487         switch (code) {
2488                 case RESULT_RING:
2489                         m->mdmreg[REG_RINGCNT]++;
2490                         if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2491                                 /* Automatically accept incoming call */
2492                                 isdn_tty_cmd_ATA(info);
2493                         break;
2494                 case RESULT_NO_CARRIER:
2495 #ifdef ISDN_DEBUG_MODEM_HUP
2496                         printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2497                                (info->flags & ISDN_ASYNC_CLOSING),
2498                                (!info->tty));
2499 #endif
2500                         m->mdmreg[REG_RINGCNT] = 0;
2501                         del_timer(&info->nc_timer);
2502                         info->ncarrier = 0;
2503                         if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2504                                 return;
2505                         }
2506 #ifdef CONFIG_ISDN_AUDIO
2507                         if (info->vonline & 1) {
2508 #ifdef ISDN_DEBUG_MODEM_VOICE
2509                                 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2510                                        info->line);
2511 #endif
2512                                 /* voice-recording, add DLE-ETX */
2513                                 isdn_tty_at_cout("\020\003", info);
2514                         }
2515                         if (info->vonline & 2) {
2516 #ifdef ISDN_DEBUG_MODEM_VOICE
2517                                 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2518                                        info->line);
2519 #endif
2520                                 /* voice-playing, add DLE-DC4 */
2521                                 isdn_tty_at_cout("\020\024", info);
2522                         }
2523 #endif
2524                         break;
2525                 case RESULT_CONNECT:
2526                 case RESULT_CONNECT64000:
2527                         sprintf(info->last_cause, "0000");
2528                         if (!info->online)
2529                                 info->online = 2;
2530                         break;
2531                 case RESULT_VCON:
2532 #ifdef ISDN_DEBUG_MODEM_VOICE
2533                         printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2534                                info->line);
2535 #endif
2536                         sprintf(info->last_cause, "0000");
2537                         if (!info->online)
2538                                 info->online = 1;
2539                         break;
2540         } /* switch(code) */
2541
2542         if (m->mdmreg[REG_RESP] & BIT_RESP) {
2543                 /* Show results */
2544                 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2545                         /* Show numeric results only */
2546                         sprintf(s, "\r\n%d\r\n", code);
2547                         isdn_tty_at_cout(s, info);
2548                 } else {
2549                         if (code == RESULT_RING) {
2550                             /* return if "show RUNG" and ringcounter>1 */
2551                             if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2552                                     (m->mdmreg[REG_RINGCNT] > 1))
2553                                                 return;
2554                             /* print CID, _before_ _every_ ring */
2555                             if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2556                                     isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2557                                     isdn_tty_at_cout(dev->num[info->drv_index], info);
2558                                     if (m->mdmreg[REG_CDN] & BIT_CDN) {
2559                                             isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2560                                             isdn_tty_at_cout(info->emu.cpn, info);
2561                                     }
2562                             }
2563                         }
2564                         isdn_tty_at_cout("\r\n", info);
2565                         isdn_tty_at_cout(msg[code], info);
2566                         switch (code) {
2567                                 case RESULT_CONNECT:
2568                                         switch (m->mdmreg[REG_L2PROT]) {
2569                                                 case ISDN_PROTO_L2_MODEM:
2570                                                         isdn_tty_at_cout(" ", info);
2571                                                         isdn_tty_at_cout(m->connmsg, info);
2572                                                         break;
2573                                         }
2574                                         break;
2575                                 case RESULT_RING:
2576                                         /* Append CPN, if enabled */
2577                                         if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2578                                                 sprintf(s, "/%s", m->cpn);
2579                                                 isdn_tty_at_cout(s, info);
2580                                         }
2581                                         /* Print CID only once, _after_ 1st RING */
2582                                         if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2583                                             (m->mdmreg[REG_RINGCNT] == 1)) {
2584                                                 isdn_tty_at_cout("\r\n", info);
2585                                                 isdn_tty_at_cout("CALLER NUMBER: ", info);
2586                                                 isdn_tty_at_cout(dev->num[info->drv_index], info);
2587                                                 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2588                                                         isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2589                                                         isdn_tty_at_cout(info->emu.cpn, info);
2590                                                 }
2591                                         }
2592                                         break;
2593                                 case RESULT_NO_CARRIER:
2594                                 case RESULT_NO_DIALTONE:
2595                                 case RESULT_BUSY:
2596                                 case RESULT_NO_ANSWER:
2597                                         m->mdmreg[REG_RINGCNT] = 0;
2598                                         /* Append Cause-Message if enabled */
2599                                         if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2600                                                 sprintf(s, "/%s", info->last_cause);
2601                                                 isdn_tty_at_cout(s, info);
2602                                         }
2603                                         break;
2604                                 case RESULT_CONNECT64000:
2605                                         /* Append Protocol to CONNECT message */
2606                                         switch (m->mdmreg[REG_L2PROT]) {
2607                                                 case ISDN_PROTO_L2_X75I:
2608                                                 case ISDN_PROTO_L2_X75UI:
2609                                                 case ISDN_PROTO_L2_X75BUI:
2610                                                         isdn_tty_at_cout("/X.75", info);
2611                                                         break;
2612                                                 case ISDN_PROTO_L2_HDLC:
2613                                                         isdn_tty_at_cout("/HDLC", info);
2614                                                         break;
2615                                                 case ISDN_PROTO_L2_V11096:
2616                                                         isdn_tty_at_cout("/V110/9600", info);
2617                                                         break;
2618                                                 case ISDN_PROTO_L2_V11019:
2619                                                         isdn_tty_at_cout("/V110/19200", info);
2620                                                         break;
2621                                                 case ISDN_PROTO_L2_V11038:
2622                                                         isdn_tty_at_cout("/V110/38400", info);
2623                                                         break;
2624                                         }
2625                                         if (m->mdmreg[REG_T70] & BIT_T70) {
2626                                                 isdn_tty_at_cout("/T.70", info);
2627                                                 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2628                                                         isdn_tty_at_cout("+", info);
2629                                         }
2630                                         break;
2631                         }
2632                         isdn_tty_at_cout("\r\n", info);
2633                 }
2634         }
2635         if (code == RESULT_NO_CARRIER) {
2636                 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2637                         return;
2638                 }
2639 #ifdef CONFIG_ISDN_AUDIO
2640                 if ( !info->vonline )
2641                         tty_ldisc_flush(info->tty);
2642 #else
2643                 tty_ldisc_flush(info->tty);
2644 #endif
2645                 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2646                     (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2647                        (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2648                         tty_hangup(info->tty);
2649                 }
2650         }
2651 }
2652
2653
2654 /*
2655  * Display a modem-register-value.
2656  */
2657 static void
2658 isdn_tty_show_profile(int ridx, modem_info * info)
2659 {
2660         char v[6];
2661
2662         sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2663         isdn_tty_at_cout(v, info);
2664 }
2665
2666 /*
2667  * Get MSN-string from char-pointer, set pointer to end of number
2668  */
2669 static void
2670 isdn_tty_get_msnstr(char *n, char **p)
2671 {
2672         int limit = ISDN_MSNLEN - 1;
2673
2674         while (((*p[0] >= '0' && *p[0] <= '9') ||
2675                 /* Why a comma ??? */
2676                 (*p[0] == ',') || (*p[0] == ':')) &&
2677                 (limit--))
2678                 *n++ = *p[0]++;
2679         *n = '\0';
2680 }
2681
2682 /*
2683  * Get phone-number from modem-commandbuffer
2684  */
2685 static void
2686 isdn_tty_getdial(char *p, char *q,int cnt)
2687 {
2688         int first = 1;
2689         int limit = ISDN_MSNLEN - 1;    /* MUST match the size of interface var to avoid
2690                                         buffer overflow */
2691
2692         while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) {
2693                 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2694                     ((*p == 'R') && first) ||
2695                     (*p == '*') || (*p == '#')) {
2696                         *q++ = *p;
2697                         limit--;
2698                 }
2699                 if(!limit)
2700                         break;
2701                 p++;
2702                 first = 0;
2703         }
2704         *q = 0;
2705 }
2706
2707 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2708 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2709
2710 static void
2711 isdn_tty_report(modem_info * info)
2712 {
2713         atemu *m = &info->emu;
2714         char s[80];
2715
2716         isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2717         sprintf(s, "    Remote Number:    %s\r\n", info->last_num);
2718         isdn_tty_at_cout(s, info);
2719         sprintf(s, "    Direction:        %s\r\n", info->last_dir ? "outgoing" : "incoming");
2720         isdn_tty_at_cout(s, info);
2721         isdn_tty_at_cout("    Layer-2 Protocol: ", info);
2722         switch (info->last_l2) {
2723                 case ISDN_PROTO_L2_X75I:
2724                         isdn_tty_at_cout("X.75i", info);
2725                         break;
2726                 case ISDN_PROTO_L2_X75UI:
2727                         isdn_tty_at_cout("X.75ui", info);
2728                         break;
2729                 case ISDN_PROTO_L2_X75BUI:
2730                         isdn_tty_at_cout("X.75bui", info);
2731                         break;
2732                 case ISDN_PROTO_L2_HDLC:
2733                         isdn_tty_at_cout("HDLC", info);
2734                         break;
2735                 case ISDN_PROTO_L2_V11096:
2736                         isdn_tty_at_cout("V.110 9600 Baud", info);
2737                         break;
2738                 case ISDN_PROTO_L2_V11019:
2739                         isdn_tty_at_cout("V.110 19200 Baud", info);
2740                         break;
2741                 case ISDN_PROTO_L2_V11038:
2742                         isdn_tty_at_cout("V.110 38400 Baud", info);
2743                         break;
2744                 case ISDN_PROTO_L2_TRANS:
2745                         isdn_tty_at_cout("transparent", info);
2746                         break;
2747                 case ISDN_PROTO_L2_MODEM:
2748                         isdn_tty_at_cout("modem", info);
2749                         break;
2750                 case ISDN_PROTO_L2_FAX:
2751                         isdn_tty_at_cout("fax", info);
2752                         break;
2753                 default:
2754                         isdn_tty_at_cout("unknown", info);
2755                         break;
2756         }
2757         if (m->mdmreg[REG_T70] & BIT_T70) {
2758                 isdn_tty_at_cout("/T.70", info);
2759                 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2760                         isdn_tty_at_cout("+", info);
2761         }
2762         isdn_tty_at_cout("\r\n", info);
2763         isdn_tty_at_cout("    Service:          ", info);
2764         switch (info->last_si) {
2765                 case 1:
2766                         isdn_tty_at_cout("audio\r\n", info);
2767                         break;
2768                 case 5:
2769                         isdn_tty_at_cout("btx\r\n", info);
2770                         break;
2771                 case 7:
2772                         isdn_tty_at_cout("data\r\n", info);
2773                         break;
2774                 default:
2775                         sprintf(s, "%d\r\n", info->last_si);
2776                         isdn_tty_at_cout(s, info);
2777                         break;
2778         }
2779         sprintf(s, "    Hangup location:  %s\r\n", info->last_lhup ? "local" : "remote");
2780         isdn_tty_at_cout(s, info);
2781         sprintf(s, "    Last cause:       %s\r\n", info->last_cause);
2782         isdn_tty_at_cout(s, info);
2783 }
2784
2785 /*
2786  * Parse AT&.. commands.
2787  */
2788 static int
2789 isdn_tty_cmd_ATand(char **p, modem_info * info)
2790 {
2791         atemu *m = &info->emu;
2792         int i;
2793         char rb[100];
2794
2795 #define MAXRB (sizeof(rb) - 1)
2796
2797         switch (*p[0]) {
2798                 case 'B':
2799                         /* &B - Set Buffersize */
2800                         p[0]++;
2801                         i = isdn_getnum(p);
2802                         if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2803                                 PARSE_ERROR1;
2804 #ifdef CONFIG_ISDN_AUDIO
2805                         if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2806                                 PARSE_ERROR1;
2807 #endif
2808                         m->mdmreg[REG_PSIZE] = i / 16;
2809                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2810                         switch (m->mdmreg[REG_L2PROT]) {
2811                                 case ISDN_PROTO_L2_V11096:
2812                                 case ISDN_PROTO_L2_V11019:
2813                                 case ISDN_PROTO_L2_V11038:
2814                                         info->xmit_size /= 10;
2815                         }
2816                         break;
2817                 case 'C':
2818                         /* &C - DCD Status */
2819                         p[0]++;
2820                         switch (isdn_getnum(p)) {
2821                                 case 0:
2822                                         m->mdmreg[REG_DCD] &= ~BIT_DCD;
2823                                         break;
2824                                 case 1:
2825                                         m->mdmreg[REG_DCD] |= BIT_DCD;
2826                                         break;
2827                                 default:
2828                                         PARSE_ERROR1
2829                         }
2830                         break;
2831                 case 'D':
2832                         /* &D - Set DTR-Low-behavior */
2833                         p[0]++;
2834                         switch (isdn_getnum(p)) {
2835                                 case 0:
2836                                         m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2837                                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2838                                         break;
2839                                 case 2:
2840                                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2841                                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2842                                         break;
2843                                 case 3:
2844                                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2845                                         m->mdmreg[REG_DTRR] |= BIT_DTRR;
2846                                         break;
2847                                 default:
2848                                         PARSE_ERROR1
2849                         }
2850                         break;
2851                 case 'E':
2852                         /* &E -Set EAZ/MSN */
2853                         p[0]++;
2854                         isdn_tty_get_msnstr(m->msn, p);
2855                         break;
2856                 case 'F':
2857                         /* &F -Set Factory-Defaults */
2858                         p[0]++;
2859                         if (info->msr & UART_MSR_DCD)
2860                                 PARSE_ERROR1;
2861                         isdn_tty_reset_profile(m);
2862                         isdn_tty_modem_reset_regs(info, 1);
2863                         break;
2864 #ifdef DUMMY_HAYES_AT
2865                 case 'K':
2866                         /* only for be compilant with common scripts */
2867                         /* &K Flowcontrol - no function */
2868                         p[0]++;
2869                         isdn_getnum(p);
2870                         break;
2871 #endif
2872                 case 'L':
2873                         /* &L -Set Numbers to listen on */
2874                         p[0]++;
2875                         i = 0;
2876                         while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2877                                (i < ISDN_LMSNLEN - 1))
2878                                 m->lmsn[i++] = *p[0]++;
2879                         m->lmsn[i] = '\0';
2880                         break;
2881                 case 'R':
2882                         /* &R - Set V.110 bitrate adaption */
2883                         p[0]++;
2884                         i = isdn_getnum(p);
2885                         switch (i) {
2886                                 case 0:
2887                                         /* Switch off V.110, back to X.75 */
2888                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2889                                         m->mdmreg[REG_SI2] = 0;
2890                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2891                                         break;
2892                                 case 9600:
2893                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2894                                         m->mdmreg[REG_SI2] = 197;
2895                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2896                                         break;
2897                                 case 19200:
2898                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2899                                         m->mdmreg[REG_SI2] = 199;
2900                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2901                                         break;
2902                                 case 38400:
2903                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2904                                         m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2905                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2906                                         break;
2907                                 default:
2908                                         PARSE_ERROR1;
2909                         }
2910                         /* Switch off T.70 */
2911                         m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2912                         /* Set Service 7 */
2913                         m->mdmreg[REG_SI1] |= 4;
2914                         break;
2915                 case 'S':
2916                         /* &S - Set Windowsize */
2917                         p[0]++;
2918                         i = isdn_getnum(p);
2919                         if ((i > 0) && (i < 9))
2920                                 m->mdmreg[REG_WSIZE] = i;
2921                         else
2922                                 PARSE_ERROR1;
2923                         break;
2924                 case 'V':
2925                         /* &V - Show registers */
2926                         p[0]++;
2927                         isdn_tty_at_cout("\r\n", info);
2928                         for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2929                                 sprintf(rb, "S%02d=%03d%s", i,
2930                                         m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2931                                 isdn_tty_at_cout(rb, info);
2932                         }
2933                         sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2934                                 strlen(m->msn) ? m->msn : "None");
2935                         isdn_tty_at_cout(rb, info);
2936                         if (strlen(m->lmsn)) {
2937                                 isdn_tty_at_cout("\r\nListen: ", info);
2938                                 isdn_tty_at_cout(m->lmsn, info);
2939                                 isdn_tty_at_cout("\r\n", info);
2940                         }
2941                         break;
2942                 case 'W':
2943                         /* &W - Write Profile */
2944                         p[0]++;
2945                         switch (*p[0]) {
2946                                 case '0':
2947                                         p[0]++;
2948                                         modem_write_profile(m);
2949                                         break;
2950                                 default:
2951                                         PARSE_ERROR1;
2952                         }
2953                         break;
2954                 case 'X':
2955                         /* &X - Switch to BTX-Mode and T.70 */
2956                         p[0]++;
2957                         switch (isdn_getnum(p)) {
2958                                 case 0:
2959                                         m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2960                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2961                                         break;
2962                                 case 1:
2963                                         m->mdmreg[REG_T70] |= BIT_T70;
2964                                         m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2965                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2966                                         info->xmit_size = 112;
2967                                         m->mdmreg[REG_SI1] = 4;
2968                                         m->mdmreg[REG_SI2] = 0;
2969                                         break;
2970                                 case 2:
2971                                         m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2972                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2973                                         info->xmit_size = 112;
2974                                         m->mdmreg[REG_SI1] = 4;
2975                                         m->mdmreg[REG_SI2] = 0;
2976                                         break;
2977                                 default:
2978                                         PARSE_ERROR1;
2979                         }
2980                         break;
2981                 default:
2982                         PARSE_ERROR1;
2983         }
2984         return 0;
2985 }
2986
2987 static int
2988 isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
2989 {
2990         /* Some plausibility checks */
2991         switch (mreg) {
2992                 case REG_L2PROT:
2993                         if (mval > ISDN_PROTO_L2_MAX)
2994                                 return 1;
2995                         break;
2996                 case REG_PSIZE:
2997                         if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2998                                 return 1;
2999 #ifdef CONFIG_ISDN_AUDIO
3000                         if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
3001                                 return 1;
3002 #endif
3003                         info->xmit_size = mval * 16;
3004                         switch (m->mdmreg[REG_L2PROT]) {
3005                                 case ISDN_PROTO_L2_V11096:
3006                                 case ISDN_PROTO_L2_V11019:
3007                                 case ISDN_PROTO_L2_V11038:
3008                                         info->xmit_size /= 10;
3009                         }
3010                         break;
3011                 case REG_SI1I:
3012                 case REG_PLAN:
3013                 case REG_SCREEN:
3014                         /* readonly registers */
3015                         return 1;
3016         }
3017         return 0;
3018 }
3019
3020 /*
3021  * Perform ATS command
3022  */
3023 static int
3024 isdn_tty_cmd_ATS(char **p, modem_info * info)
3025 {
3026         atemu *m = &info->emu;
3027         int bitpos;
3028         int mreg;
3029         int mval;
3030         int bval;
3031
3032         mreg = isdn_getnum(p);
3033         if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3034                 PARSE_ERROR1;
3035         switch (*p[0]) {
3036                 case '=':
3037                         p[0]++;
3038                         mval = isdn_getnum(p);
3039                         if (mval < 0 || mval > 255)
3040                                 PARSE_ERROR1;
3041                         if (isdn_tty_check_ats(mreg, mval, info, m))
3042                                 PARSE_ERROR1;
3043                         m->mdmreg[mreg] = mval;
3044                         break;
3045                 case '.':
3046                         /* Set/Clear a single bit */
3047                         p[0]++;
3048                         bitpos = isdn_getnum(p);
3049                         if ((bitpos < 0) || (bitpos > 7))
3050                                 PARSE_ERROR1;
3051                         switch (*p[0]) {
3052                                 case '=':
3053                                         p[0]++;
3054                                         bval = isdn_getnum(p);
3055                                         if (bval < 0 || bval > 1)
3056                                                 PARSE_ERROR1;
3057                                         if (bval)
3058                                                 mval = m->mdmreg[mreg] | (1 << bitpos);
3059                                         else
3060                                                 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3061                                         if (isdn_tty_check_ats(mreg, mval, info, m))
3062                                                 PARSE_ERROR1;
3063                                         m->mdmreg[mreg] = mval;
3064                                         break;
3065                                 case '?':
3066                                         p[0]++;
3067                                         isdn_tty_at_cout("\r\n", info);
3068                                         isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3069                                                          info);
3070                                         break;
3071                                 default:
3072                                         PARSE_ERROR1;
3073                         }
3074                         break;
3075                 case '?':
3076                         p[0]++;
3077                         isdn_tty_show_profile(mreg, info);
3078                         break;
3079                 default:
3080                         PARSE_ERROR1;
3081                         break;
3082         }
3083         return 0;
3084 }
3085
3086 /*
3087  * Perform ATA command
3088  */
3089 static void
3090 isdn_tty_cmd_ATA(modem_info * info)
3091 {
3092         atemu *m = &info->emu;
3093         isdn_ctrl cmd;
3094         int l2;
3095
3096         if (info->msr & UART_MSR_RI) {
3097                 /* Accept incoming call */
3098                 info->last_dir = 0;
3099                 strcpy(info->last_num, dev->num[info->drv_index]);
3100                 m->mdmreg[REG_RINGCNT] = 0;
3101                 info->msr &= ~UART_MSR_RI;
3102                 l2 = m->mdmreg[REG_L2PROT];
3103 #ifdef CONFIG_ISDN_AUDIO
3104                 /* If more than one bit set in reg18, autoselect Layer2 */
3105                 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3106                         if (m->mdmreg[REG_SI1I] == 1) {
3107                                 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3108                                         l2 = ISDN_PROTO_L2_TRANS;
3109                         } else
3110                                 l2 = ISDN_PROTO_L2_X75I;
3111                 }
3112 #endif
3113                 cmd.driver = info->isdn_driver;
3114                 cmd.command = ISDN_CMD_SETL2;
3115                 cmd.arg = info->isdn_channel + (l2 << 8);
3116                 info->last_l2 = l2;
3117                 isdn_command(&cmd);
3118                 cmd.driver = info->isdn_driver;
3119                 cmd.command = ISDN_CMD_SETL3;
3120                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3121 #ifdef CONFIG_ISDN_TTY_FAX
3122                 if (l2 == ISDN_PROTO_L2_FAX) {
3123                         cmd.parm.fax = info->fax;
3124                         info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3125                 }
3126 #endif
3127                 isdn_command(&cmd);
3128                 cmd.driver = info->isdn_driver;
3129                 cmd.arg = info->isdn_channel;
3130                 cmd.command = ISDN_CMD_ACCEPTD;
3131                 info->dialing = 16;
3132                 info->emu.carrierwait = 0;
3133                 isdn_command(&cmd);
3134                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3135         } else
3136                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3137 }
3138
3139 #ifdef CONFIG_ISDN_AUDIO
3140 /*
3141  * Parse AT+F.. commands
3142  */
3143 static int
3144 isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3145 {
3146         atemu *m = &info->emu;
3147         char rs[20];
3148
3149         if (!strncmp(p[0], "CLASS", 5)) {
3150                 p[0] += 5;
3151                 switch (*p[0]) {
3152                         case '?':
3153                                 p[0]++;
3154                                 sprintf(rs, "\r\n%d",
3155                                         (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3156 #ifdef CONFIG_ISDN_TTY_FAX
3157                                 if (TTY_IS_FCLASS2(info))
3158                                                 sprintf(rs, "\r\n2");
3159                                 else if (TTY_IS_FCLASS1(info))
3160                                                 sprintf(rs, "\r\n1");
3161 #endif
3162                                 isdn_tty_at_cout(rs, info);
3163                                 break;
3164                         case '=':
3165                                 p[0]++;
3166                                 switch (*p[0]) {
3167                                         case '0':
3168                                                 p[0]++;
3169                                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3170                                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3171                                                 m->mdmreg[REG_SI1] = 4;
3172                                                 info->xmit_size =
3173                                                     m->mdmreg[REG_PSIZE] * 16;
3174                                                 break;
3175 #ifdef CONFIG_ISDN_TTY_FAX
3176                                         case '1':
3177                                                 p[0]++;
3178                                                 if (!(dev->global_features &
3179                                                         ISDN_FEATURE_L3_FCLASS1))
3180                                                         PARSE_ERROR1;
3181                                                 m->mdmreg[REG_SI1] = 1;
3182                                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3183                                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3184                                                 info->xmit_size =
3185                                                     m->mdmreg[REG_PSIZE] * 16;
3186                                                 break;
3187                                         case '2':
3188                                                 p[0]++;
3189                                                 if (!(dev->global_features &
3190                                                         ISDN_FEATURE_L3_FCLASS2))
3191                                                         PARSE_ERROR1;
3192                                                 m->mdmreg[REG_SI1] = 1;
3193                                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3194                                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3195                                                 info->xmit_size =
3196                                                     m->mdmreg[REG_PSIZE] * 16;
3197                                                 break;
3198 #endif
3199                                         case '8':
3200                                                 p[0]++;
3201                                                 /* L2 will change on dialout with si=1 */
3202                                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3203                                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3204                                                 m->mdmreg[REG_SI1] = 5;
3205                                                 info->xmit_size = VBUF;
3206                                                 break;
3207                                         case '?':
3208                                                 p[0]++;
3209                                                 strcpy(rs, "\r\n0,");
3210 #ifdef CONFIG_ISDN_TTY_FAX
3211                                                 if (dev->global_features &
3212                                                         ISDN_FEATURE_L3_FCLASS1)
3213                                                         strcat(rs, "1,");
3214                                                 if (dev->global_features &
3215                                                         ISDN_FEATURE_L3_FCLASS2)
3216                                                         strcat(rs, "2,");
3217 #endif
3218                                                 strcat(rs, "8");
3219                                                 isdn_tty_at_cout(rs, info);
3220                                                 break;
3221                                         default:
3222                                                 PARSE_ERROR1;
3223                                 }
3224                                 break;
3225                         default:
3226                                 PARSE_ERROR1;
3227                 }
3228                 return 0;
3229         }
3230 #ifdef CONFIG_ISDN_TTY_FAX
3231         return (isdn_tty_cmd_PLUSF_FAX(p, info));
3232 #else
3233         PARSE_ERROR1;
3234 #endif
3235 }
3236
3237 /*
3238  * Parse AT+V.. commands
3239  */
3240 static int
3241 isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3242 {
3243         atemu *m = &info->emu;
3244         isdn_ctrl cmd;
3245         static char *vcmd[] =
3246         {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3247         int i;
3248         int par1;
3249         int par2;
3250         char rs[20];
3251
3252         i = 0;
3253         while (vcmd[i]) {
3254                 if (!strncmp(vcmd[i], p[0], 2)) {
3255                         p[0] += 2;
3256                         break;
3257                 }
3258                 i++;
3259         }
3260         switch (i) {
3261                 case 0:
3262                         /* AT+VNH - Auto hangup feature */
3263                         switch (*p[0]) {
3264                                 case '?':
3265                                         p[0]++;
3266                                         isdn_tty_at_cout("\r\n1", info);
3267                                         break;
3268                                 case '=':
3269                                         p[0]++;
3270                                         switch (*p[0]) {
3271                                                 case '1':
3272                                                         p[0]++;
3273                                                         break;
3274                                                 case '?':
3275                                                         p[0]++;
3276                                                         isdn_tty_at_cout("\r\n1", info);
3277                                                         break;
3278                                                 default:
3279                                                         PARSE_ERROR1;
3280                                         }
3281                                         break;
3282                                 default:
3283                                         PARSE_ERROR1;
3284                         }
3285                         break;
3286                 case 1:
3287                         /* AT+VIP - Reset all voice parameters */
3288                         isdn_tty_modem_reset_vpar(m);
3289                         break;
3290                 case 2:
3291                         /* AT+VLS - Select device, accept incoming call */
3292                         switch (*p[0]) {
3293                                 case '?':
3294                                         p[0]++;
3295                                         sprintf(rs, "\r\n%d", m->vpar[0]);
3296                                         isdn_tty_at_cout(rs, info);
3297                                         break;
3298                                 case '=':
3299                                         p[0]++;
3300                                         switch (*p[0]) {
3301                                                 case '0':
3302                                                         p[0]++;
3303                                                         m->vpar[0] = 0;
3304                                                         break;
3305                                                 case '2':
3306                                                         p[0]++;
3307                                                         m->vpar[0] = 2;
3308                                                         break;
3309                                                 case '?':
3310                                                         p[0]++;
3311                                                         isdn_tty_at_cout("\r\n0,2", info);
3312                                                         break;
3313                                                 default:
3314                                                         PARSE_ERROR1;
3315                                         }
3316                                         break;
3317                                 default:
3318                                         PARSE_ERROR1;
3319                         }
3320                         break;
3321                 case 3:
3322                         /* AT+VRX - Start recording */
3323                         if (!m->vpar[0])
3324                                 PARSE_ERROR1;
3325                         if (info->online != 1) {
3326                                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3327                                 return 1;
3328                         }
3329                         info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3330                         if (!info->dtmf_state) {
3331                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3332                                 PARSE_ERROR1;
3333                         }
3334                         info->silence_state = isdn_audio_silence_init(info->silence_state);
3335                         if (!info->silence_state) {
3336                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3337                                 PARSE_ERROR1;
3338                         }
3339                         if (m->vpar[3] < 5) {
3340                                 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3341                                 if (!info->adpcmr) {
3342                                         printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3343                                         PARSE_ERROR1;
3344                                 }
3345                         }
3346 #ifdef ISDN_DEBUG_AT
3347                         printk(KERN_DEBUG "AT: +VRX\n");
3348 #endif
3349                         info->vonline |= 1;
3350                         isdn_tty_modem_result(RESULT_CONNECT, info);
3351                         return 0;
3352                         break;
3353                 case 4:
3354                         /* AT+VSD - Silence detection */
3355                         switch (*p[0]) {
3356                                 case '?':
3357                                         p[0]++;
3358                                         sprintf(rs, "\r\n<%d>,<%d>",
3359                                                 m->vpar[1],
3360                                                 m->vpar[2]);
3361                                         isdn_tty_at_cout(rs, info);
3362                                         break;
3363                                 case '=':
3364                                         p[0]++;
3365                                         if ((*p[0]>='0') && (*p[0]<='9')) {
3366                                                 par1 = isdn_getnum(p);
3367                                                 if ((par1 < 0) || (par1 > 31))
3368                                                         PARSE_ERROR1;
3369                                                 if (*p[0] != ',')
3370                                                         PARSE_ERROR1;
3371                                                 p[0]++;
3372                                                 par2 = isdn_getnum(p);
3373                                                 if ((par2 < 0) || (par2 > 255))
3374                                                         PARSE_ERROR1;
3375                                                 m->vpar[1] = par1;
3376                                                 m->vpar[2] = par2;
3377                                                 break;
3378                                         } else
3379                                         if (*p[0] == '?') {
3380                                                 p[0]++;
3381                                                 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3382                                                            info);
3383                                                 break;
3384                                         } else
3385                                         PARSE_ERROR1;
3386                                         break;
3387                                 default:
3388                                         PARSE_ERROR1;
3389                         }
3390                         break;
3391                 case 5:
3392                         /* AT+VSM - Select compression */
3393                         switch (*p[0]) {
3394                                 case '?':
3395                                         p[0]++;
3396                                         sprintf(rs, "\r\n<%d>,<%d><8000>",
3397                                                 m->vpar[3],
3398                                                 m->vpar[1]);
3399                                         isdn_tty_at_cout(rs, info);
3400                                         break;
3401                                 case '=':
3402                                         p[0]++;
3403                                         switch (*p[0]) {
3404                                                 case '2':
3405                                                 case '3':
3406                                                 case '4':
3407                                                 case '5':
3408                                                 case '6':
3409                                                         par1 = isdn_getnum(p);
3410                                                         if ((par1 < 2) || (par1 > 6))
3411                                                                 PARSE_ERROR1;
3412                                                         m->vpar[3] = par1;
3413                                                         break;
3414                                                 case '?':
3415                                                         p[0]++;
3416                                                         isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3417                                                                    info);
3418                                                         isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3419                                                                    info);
3420                                                         isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3421                                                                    info);
3422                                                         isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3423                                                                    info);
3424                                                         isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3425                                                                    info);
3426                                                         break;
3427                                                 default:
3428                                                         PARSE_ERROR1;
3429                                         }
3430                                         break;
3431                                 default:
3432                                         PARSE_ERROR1;
3433                         }
3434                         break;
3435                 case 6:
3436                         /* AT+VTX - Start sending */
3437                         if (!m->vpar[0])
3438                                 PARSE_ERROR1;
3439                         if (info->online != 1) {
3440                                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3441                                 return 1;
3442                         }
3443                         info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3444                         if (!info->dtmf_state) {
3445                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3446                                 PARSE_ERROR1;
3447                         }
3448                         if (m->vpar[3] < 5) {
3449                                 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3450                                 if (!info->adpcms) {
3451                                         printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3452                                         PARSE_ERROR1;
3453                                 }
3454                         }
3455 #ifdef ISDN_DEBUG_AT
3456                         printk(KERN_DEBUG "AT: +VTX\n");
3457 #endif
3458                         m->lastDLE = 0;
3459                         info->vonline |= 2;
3460                         isdn_tty_modem_result(RESULT_CONNECT, info);
3461                         return 0;
3462                         break;
3463                 case 7:
3464                         /* AT+VDD - DTMF detection */
3465                         switch (*p[0]) {
3466                                 case '?':
3467                                         p[0]++;
3468                                         sprintf(rs, "\r\n<%d>,<%d>",
3469                                                 m->vpar[4],
3470                                                 m->vpar[5]);
3471                                         isdn_tty_at_cout(rs, info);
3472                                         break;
3473                                 case '=':
3474                                         p[0]++;
3475                                         if ((*p[0]>='0') && (*p[0]<='9')) {
3476                                                 if (info->online != 1)
3477                                                         PARSE_ERROR1;
3478                                                 par1 = isdn_getnum(p);
3479                                                 if ((par1 < 0) || (par1 > 15))
3480                                                         PARSE_ERROR1;
3481                                                 if (*p[0] != ',')
3482                                                         PARSE_ERROR1;
3483                                                 p[0]++;
3484                                                 par2 = isdn_getnum(p);
3485                                                 if ((par2 < 0) || (par2 > 255))
3486                                                         PARSE_ERROR1;
3487                                                 m->vpar[4] = par1;
3488                                                 m->vpar[5] = par2;
3489                                                 cmd.driver = info->isdn_driver;
3490                                                 cmd.command = ISDN_CMD_AUDIO;
3491                                                 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3492                                                 cmd.parm.num[0] = par1;
3493                                                 cmd.parm.num[1] = par2;
3494                                                 isdn_command(&cmd);
3495                                                 break;
3496                                         } else
3497                                         if (*p[0] == '?') {
3498                                                 p[0]++;
3499                                                 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3500                                                         info);
3501                                                 break;
3502                                         } else
3503                                         PARSE_ERROR1;
3504                                         break;
3505                                 default:
3506                                         PARSE_ERROR1;
3507                         }
3508                         break;
3509                 default:
3510                         PARSE_ERROR1;
3511         }
3512         return 0;
3513 }
3514 #endif                          /* CONFIG_ISDN_AUDIO */
3515
3516 /*
3517  * Parse and perform an AT-command-line.
3518  */
3519 static void
3520 isdn_tty_parse_at(modem_info * info)
3521 {
3522         atemu *m = &info->emu;
3523         char *p;
3524         char ds[40];
3525
3526 #ifdef ISDN_DEBUG_AT
3527         printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3528 #endif
3529         for (p = &m->mdmcmd[2]; *p;) {
3530                 switch (*p) {
3531                         case ' ':
3532                                 p++;
3533                                 break;
3534                         case 'A':
3535                                 /* A - Accept incoming call */
3536                                 p++;
3537                                 isdn_tty_cmd_ATA(info);
3538                                 return;
3539                                 break;
3540                         case 'D':
3541                                 /* D - Dial */
3542                                 if (info->msr & UART_MSR_DCD)
3543                                         PARSE_ERROR;
3544                                 if (info->msr & UART_MSR_RI) {
3545                                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3546                                         return;
3547                                 }
3548                                 isdn_tty_getdial(++p, ds, sizeof ds);
3549                                 p += strlen(p);
3550                                 if (!strlen(m->msn))
3551                                         isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3552                                 else if (strlen(ds))
3553                                         isdn_tty_dial(ds, info, m);
3554                                 else
3555                                         PARSE_ERROR;
3556                                 return;
3557                         case 'E':
3558                                 /* E - Turn Echo on/off */
3559                                 p++;
3560                                 switch (isdn_getnum(&p)) {
3561                                         case 0:
3562                                                 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3563                                                 break;
3564                                         case 1:
3565                                                 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3566                                                 break;
3567                                         default:
3568                                                 PARSE_ERROR;
3569                                 }
3570                                 break;
3571                         case 'H':
3572                                 /* H - On/Off-hook */
3573                                 p++;
3574                                 switch (*p) {
3575                                         case '0':
3576                                                 p++;
3577                                                 isdn_tty_on_hook(info);
3578                                                 break;
3579                                         case '1':
3580                                                 p++;
3581                                                 isdn_tty_off_hook();
3582                                                 break;
3583                                         default:
3584                                                 isdn_tty_on_hook(info);
3585                                                 break;
3586                                 }
3587                                 break;
3588                         case 'I':
3589                                 /* I - Information */
3590                                 p++;
3591                                 isdn_tty_at_cout("\r\nLinux ISDN", info);
3592                                 switch (*p) {
3593                                         case '0':
3594                                         case '1':
3595                                                 p++;
3596                                                 break;
3597                                         case '2':
3598                                                 p++;
3599                                                 isdn_tty_report(info);
3600                                                 break;
3601                                         case '3':
3602                                                 p++;
3603                                                 sprintf(ds, "\r\n%d", info->emu.charge);
3604                                                 isdn_tty_at_cout(ds, info);
3605                                                 break;
3606                                         default:;
3607                                 }
3608                                 break;
3609 #ifdef DUMMY_HAYES_AT
3610                         case 'L':
3611                         case 'M':
3612                                 /* only for be compilant with common scripts */
3613                                 /* no function */
3614                                 p++;
3615                                 isdn_getnum(&p);
3616                                 break;
3617 #endif
3618                         case 'O':
3619                                 /* O - Go online */
3620                                 p++;
3621                                 if (info->msr & UART_MSR_DCD)
3622                                         /* if B-Channel is up */
3623                                         isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3624                                 else
3625                                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3626                                 return;
3627                         case 'Q':
3628                                 /* Q - Turn Emulator messages on/off */
3629                                 p++;
3630                                 switch (isdn_getnum(&p)) {
3631                                         case 0:
3632                                                 m->mdmreg[REG_RESP] |= BIT_RESP;
3633                                                 break;
3634                                         case 1:
3635                                                 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3636                                                 break;
3637                                         default:
3638                                                 PARSE_ERROR;
3639                                 }
3640                                 break;
3641                         case 'S':
3642                                 /* S - Set/Get Register */
3643                                 p++;
3644                                 if (isdn_tty_cmd_ATS(&p, info))
3645                                         return;
3646                                 break;
3647                         case 'V':
3648                                 /* V - Numeric or ASCII Emulator-messages */
3649                                 p++;
3650                                 switch (isdn_getnum(&p)) {
3651                                         case 0:
3652                                                 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3653                                                 break;
3654                                         case 1:
3655                                                 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3656                                                 break;
3657                                         default:
3658                                                 PARSE_ERROR;
3659                                 }
3660                                 break;
3661                         case 'Z':
3662                                 /* Z - Load Registers from Profile */
3663                                 p++;
3664                                 if (info->msr & UART_MSR_DCD) {
3665                                         info->online = 0;
3666                                         isdn_tty_on_hook(info);
3667                                 }
3668                                 isdn_tty_modem_reset_regs(info, 1);
3669                                 break;
3670                         case '+':
3671                                 p++;
3672                                 switch (*p) {
3673 #ifdef CONFIG_ISDN_AUDIO
3674                                         case 'F':
3675                                                 p++;
3676                                                 if (isdn_tty_cmd_PLUSF(&p, info))
3677                                                         return;
3678                                                 break;
3679                                         case 'V':
3680                                                 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3681                                                         (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3682                                                         PARSE_ERROR;
3683                                                 p++;
3684                                                 if (isdn_tty_cmd_PLUSV(&p, info))
3685                                                         return;
3686                                                 break;
3687 #endif                          /* CONFIG_ISDN_AUDIO */
3688                                         case 'S':       /* SUSPEND */
3689                                                 p++;
3690                                                 isdn_tty_get_msnstr(ds, &p);
3691                                                 isdn_tty_suspend(ds, info, m);
3692                                                 break;
3693                                         case 'R':       /* RESUME */
3694                                                 p++;
3695                                                 isdn_tty_get_msnstr(ds, &p);
3696                                                 isdn_tty_resume(ds, info, m);
3697                                                 break;
3698                                         case 'M':       /* MESSAGE */
3699                                                 p++;
3700                                                 isdn_tty_send_msg(info, m, p);
3701                                                 break;
3702                                         default:
3703                                                 PARSE_ERROR;
3704                                 }
3705                                 break;
3706                         case '&':
3707                                 p++;
3708                                 if (isdn_tty_cmd_ATand(&p, info))
3709                                         return;
3710                                 break;
3711                         default:
3712                                 PARSE_ERROR;
3713                 }
3714         }
3715 #ifdef CONFIG_ISDN_AUDIO
3716         if (!info->vonline)
3717 #endif
3718                 isdn_tty_modem_result(RESULT_OK, info);
3719 }
3720
3721 /* Need own toupper() because standard-toupper is not available
3722  * within modules.
3723  */
3724 #define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3725
3726 /*
3727  * Perform line-editing of AT-commands
3728  *
3729  * Parameters:
3730  *   p        inputbuffer
3731  *   count    length of buffer
3732  *   channel  index to line (minor-device)
3733  */
3734 static int
3735 isdn_tty_edit_at(const char *p, int count, modem_info * info)
3736 {
3737         atemu *m = &info->emu;
3738         int total = 0;
3739         u_char c;
3740         char eb[2];
3741         int cnt;
3742
3743         for (cnt = count; cnt > 0; p++, cnt--) {
3744                 c = *p;
3745                 total++;
3746                 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3747                         /* Separator (CR or LF) */
3748                         m->mdmcmd[m->mdmcmdl] = 0;
3749                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3750                                 eb[0] = c;
3751                                 eb[1] = 0;
3752                                 isdn_tty_at_cout(eb, info);
3753                         }
3754                         if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3755                                 isdn_tty_parse_at(info);
3756                         m->mdmcmdl = 0;
3757                         continue;
3758                 }
3759                 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3760                         /* Backspace-Function */
3761                         if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3762                                 if (m->mdmcmdl)
3763                                         m->mdmcmdl--;
3764                                 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3765                                         isdn_tty_at_cout("\b", info);
3766                         }
3767                         continue;
3768                 }
3769                 if (cmdchar(c)) {
3770                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3771                                 eb[0] = c;
3772                                 eb[1] = 0;
3773                                 isdn_tty_at_cout(eb, info);
3774                         }
3775                         if (m->mdmcmdl < 255) {
3776                                 c = my_toupper(c);
3777                                 switch (m->mdmcmdl) {
3778                                         case 1:
3779                                                 if (c == 'T') {
3780                                                         m->mdmcmd[m->mdmcmdl] = c;
3781                                                         m->mdmcmd[++m->mdmcmdl] = 0;
3782                                                         break;
3783                                                 } else
3784                                                         m->mdmcmdl = 0;
3785                                                 /* Fall through, check for 'A' */
3786                                         case 0:
3787                                                 if (c == 'A') {
3788                                                         m->mdmcmd[m->mdmcmdl] = c;
3789                                                         m->mdmcmd[++m->mdmcmdl] = 0;
3790                                                 }
3791                                                 break;
3792                                         default:
3793                                                 m->mdmcmd[m->mdmcmdl] = c;
3794                                                 m->mdmcmd[++m->mdmcmdl] = 0;
3795                                 }
3796                         }
3797                 }
3798         }
3799         return total;
3800 }
3801
3802 /*
3803  * Switch all modem-channels who are online and got a valid
3804  * escape-sequence 1.5 seconds ago, to command-mode.
3805  * This function is called every second via timer-interrupt from within
3806  * timer-dispatcher isdn_timer_function()
3807  */
3808 void
3809 isdn_tty_modem_escape(void)
3810 {
3811         int ton = 0;
3812         int i;
3813         int midx;
3814
3815         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3816                 if (USG_MODEM(dev->usage[i]))
3817                         if ((midx = dev->m_idx[i]) >= 0) {
3818                                 modem_info *info = &dev->mdm.info[midx];
3819                                 if (info->online) {
3820                                         ton = 1;
3821                                         if ((info->emu.pluscount == 3) &&
3822                                             time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3823                                                 info->emu.pluscount = 0;
3824                                                 info->online = 0;
3825                                                 isdn_tty_modem_result(RESULT_OK, info);
3826                                         }
3827                                 }
3828                         }
3829         isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3830 }
3831
3832 /*
3833  * Put a RING-message to all modem-channels who have the RI-bit set.
3834  * This function is called every second via timer-interrupt from within
3835  * timer-dispatcher isdn_timer_function()
3836  */
3837 void
3838 isdn_tty_modem_ring(void)
3839 {
3840         int ton = 0;
3841         int i;
3842
3843         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3844                 modem_info *info = &dev->mdm.info[i];
3845                 if (info->msr & UART_MSR_RI) {
3846                         ton = 1;
3847                         isdn_tty_modem_result(RESULT_RING, info);
3848                 }
3849         }
3850         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3851 }
3852
3853 /*
3854  * For all online tty's, try sending data to
3855  * the lower levels.
3856  */
3857 void
3858 isdn_tty_modem_xmit(void)
3859 {
3860         int ton = 1;
3861         int i;
3862
3863         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3864                 modem_info *info = &dev->mdm.info[i];
3865                 if (info->online) {
3866                         ton = 1;
3867                         isdn_tty_senddown(info);
3868                         isdn_tty_tint(info);
3869                 }
3870         }
3871         isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3872 }
3873
3874 /*
3875  * Check all channels if we have a 'no carrier' timeout.
3876  * Timeout value is set by Register S7.
3877  */
3878 void
3879 isdn_tty_carrier_timeout(void)
3880 {
3881         int ton = 0;
3882         int i;
3883
3884         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3885                 modem_info *info = &dev->mdm.info[i];
3886                 if (info->dialing) {
3887                         if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3888                                 info->dialing = 0;
3889                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3890                                 isdn_tty_modem_hup(info, 1);
3891                         }
3892                         else
3893                                 ton = 1;
3894                 }
3895         }
3896         isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3897 }