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/slab.h>
  16 #include <linux/delay.h>
  17 #include <linux/mutex.h>
  18 #include "isdn_common.h"
  19 #include "isdn_tty.h"
  20 #ifdef CONFIG_ISDN_AUDIO
  21 #include "isdn_audio.h"
  22 #define VBUF 0x3e0
  23 #define VBUFX (VBUF/16)
  24 #endif
  25
  26 #define FIX_FILE_TRANSFER
  27 #define DUMMY_HAYES_AT
  28
  29 /* Prototypes */
  30
  31 static DEFINE_MUTEX(modem_info_mutex);
  32 static int isdn_tty_edit_at(const char *, int, modem_info *);
  33 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
  34 static void isdn_tty_modem_reset_regs(modem_info *, int);
  35 static void isdn_tty_cmd_ATA(modem_info *);
  36 static void isdn_tty_flush_buffer(struct tty_struct *);
  37 static void isdn_tty_modem_result(int, modem_info *);
  38 #ifdef CONFIG_ISDN_AUDIO
  39 static int isdn_tty_countDLE(unsigned char *, int);
  40 #endif
  41
  42 /* Leave this unchanged unless you know what you do! */
  43 #define MODEM_PARANOIA_CHECK
  44 #define MODEM_DO_RESTART
  45
  46 static int bit2si[8] =
  47 {1, 5, 7, 7, 7, 7, 7, 7};
  48 static int si2bit[8] =
  49 {4, 1, 4, 4, 4, 4, 4, 4};
  50
  51 char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
  52
  53
  54 /* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
  55  * to stuff incoming data directly into a tty's flip-buffer. This
  56  * is done to speed up tty-receiving if the receive-queue is empty.
  57  * This routine MUST be called with interrupts off.
  58  * Return:
  59  *  1 = Success
  60  *  0 = Failure, data has to be buffered and later processed by
  61  *      isdn_tty_readmodem().
  62  */
  63 static int
  64 isdn_tty_try_read(modem_info * info, struct sk_buff *skb)
  65 {
  66         int c;
  67         int len;
  68         struct tty_struct *tty;
  69         char last;
  70
  71         if (info->online) {
  72                 if ((tty = info->tty)) {
  73                         if (info->mcr & UART_MCR_RTS) {
  74                                 len = skb->len
  75 #ifdef CONFIG_ISDN_AUDIO
  76                                         + ISDN_AUDIO_SKB_DLECOUNT(skb)
  77 #endif
  78                                         ;
  79
  80                                 c = tty_buffer_request_room(tty, len);
  81                                 if (c >= len) {
  82 #ifdef CONFIG_ISDN_AUDIO
  83                                         if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
  84                                                 int l = skb->len;
  85                                                 unsigned char *dp = skb->data;
  86                                                 while (--l) {
  87                                                         if (*dp == DLE)
  88                                                                 tty_insert_flip_char(tty, DLE, 0);
  89                                                         tty_insert_flip_char(tty, *dp++, 0);
  90                                                 }
  91                                                 if (*dp == DLE)
  92                                                         tty_insert_flip_char(tty, DLE, 0);
  93                                                 last = *dp;
  94                                         } else {
  95 #endif
  96                                                 if(len > 1)
  97                                                         tty_insert_flip_string(tty, skb->data, len - 1);
  98                                                 last = skb->data[len - 1];
  99 #ifdef CONFIG_ISDN_AUDIO
 100                                         }
 101 #endif
 102                                         if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
 103                                                 tty_insert_flip_char(tty, last, 0xFF);
 104                                         else
 105                                                 tty_insert_flip_char(tty, last, TTY_NORMAL);
 106                                         tty_flip_buffer_push(tty);
 107                                         kfree_skb(skb);
 108                                         return 1;
 109                                 }
 110                         }
 111                 }
 112         }
 113         return 0;
 114 }
 115
 116 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
 117  * It tries getting received data from the receive queue an stuff it into
 118  * the tty's flip-buffer.
 119  */
 120 void
 121 isdn_tty_readmodem(void)
 122 {
 123         int resched = 0;
 124         int midx;
 125         int i;
 126         int r;
 127         struct tty_struct *tty;
 128         modem_info *info;
 129
 130         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
 131                 if ((midx = dev->m_idx[i]) >= 0) {
 132                         info = &dev->mdm.info[midx];
 133                         if (info->online) {
 134                                 r = 0;
 135 #ifdef CONFIG_ISDN_AUDIO
 136                                 isdn_audio_eval_dtmf(info);
 137                                 if ((info->vonline & 1) && (info->emu.vpar[1]))
 138                                         isdn_audio_eval_silence(info);
 139 #endif
 140                                 if ((tty = info->tty)) {
 141                                         if (info->mcr & UART_MCR_RTS) {
 142                                                 /* CISCO AsyncPPP Hack */
 143                                                 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
 144                                                         r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
 145                                                 else
 146                                                         r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
 147                                                 if (r)
 148                                                         tty_flip_buffer_push(tty);
 149                                         } else
 150                                                 r = 1;
 151                                 } else
 152                                         r = 1;
 153                                 if (r) {
 154                                         info->rcvsched = 0;
 155                                         resched = 1;
 156                                 } else
 157                                         info->rcvsched = 1;
 158                         }
 159                 }
 160         }
 161         if (!resched)
 162                 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
 163 }
 164
 165 int
 166 isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
 167 {
 168         ulong flags;
 169         int midx;
 170 #ifdef CONFIG_ISDN_AUDIO
 171         int ifmt;
 172 #endif
 173         modem_info *info;
 174
 175         if ((midx = dev->m_idx[i]) < 0) {
 176                 /* if midx is invalid, packet is not for tty */
 177                 return 0;
 178         }
 179         info = &dev->mdm.info[midx];
 180 #ifdef CONFIG_ISDN_AUDIO
 181         ifmt = 1;
 182
 183         if ((info->vonline) && (!info->emu.vpar[4]))
 184                 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
 185         if ((info->vonline & 1) && (info->emu.vpar[1]))
 186                 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
 187 #endif
 188         if ((info->online < 2)
 189 #ifdef CONFIG_ISDN_AUDIO
 190             && (!(info->vonline & 1))
 191 #endif
 192                 ) {
 193                 /* If Modem not listening, drop data */
 194                 kfree_skb(skb);
 195                 return 1;
 196         }
 197         if (info->emu.mdmreg[REG_T70] & BIT_T70) {
 198                 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
 199                         /* T.70 decoding: throw away the T.70 header (2 or 4 bytes)   */
 200                         if (skb->data[0] == 3) /* pure data packet -> 4 byte headers  */
 201                                 skb_pull(skb, 4);
 202                         else
 203                                 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr  */
 204                                         skb_pull(skb, 2);
 205                 } else
 206                         /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
 207                         if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
 208                                 skb_pull(skb, 4);
 209         }
 210 #ifdef CONFIG_ISDN_AUDIO
 211         ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
 212         ISDN_AUDIO_SKB_LOCK(skb) = 0;
 213         if (info->vonline & 1) {
 214                 /* voice conversion/compression */
 215                 switch (info->emu.vpar[3]) {
 216                         case 2:
 217                         case 3:
 218                         case 4:
 219                                 /* adpcm
 220                                  * Since compressed data takes less
 221                                  * space, we can overwrite the buffer.
 222                                  */
 223                                 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
 224                                                                     ifmt,
 225                                                                     skb->data,
 226                                                                     skb->data,
 227                                                                     skb->len));
 228                                 break;
 229                         case 5:
 230                                 /* a-law */
 231                                 if (!ifmt)
 232                                         isdn_audio_ulaw2alaw(skb->data, skb->len);
 233                                 break;
 234                         case 6:
 235                                 /* u-law */
 236                                 if (ifmt)
 237                                         isdn_audio_alaw2ulaw(skb->data, skb->len);
 238                                 break;
 239                 }
 240                 ISDN_AUDIO_SKB_DLECOUNT(skb) =
 241                         isdn_tty_countDLE(skb->data, skb->len);
 242         }
 243 #ifdef CONFIG_ISDN_TTY_FAX
 244         else {
 245                 if (info->faxonline & 2) {
 246                         isdn_tty_fax_bitorder(info, skb);
 247                         ISDN_AUDIO_SKB_DLECOUNT(skb) =
 248                                 isdn_tty_countDLE(skb->data, skb->len);
 249                 }
 250         }
 251 #endif
 252 #endif
 253         /* Try to deliver directly via tty-buf if queue is empty */
 254         spin_lock_irqsave(&info->readlock, flags);
 255         if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
 256                 if (isdn_tty_try_read(info, skb)) {
 257                         spin_unlock_irqrestore(&info->readlock, flags);
 258                         return 1;
 259                 }
 260         /* Direct deliver failed or queue wasn't empty.
 261          * Queue up for later dequeueing via timer-irq.
 262          */
 263         __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
 264         dev->drv[di]->rcvcount[channel] +=
 265                 (skb->len
 266 #ifdef CONFIG_ISDN_AUDIO
 267                  + ISDN_AUDIO_SKB_DLECOUNT(skb)
 268 #endif
 269                         );
 270         spin_unlock_irqrestore(&info->readlock, flags);
 271         /* Schedule dequeuing */
 272         if ((dev->modempoll) && (info->rcvsched))
 273                 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
 274         return 1;
 275 }
 276
 277 static void
 278 isdn_tty_cleanup_xmit(modem_info * info)
 279 {
 280         skb_queue_purge(&info->xmit_queue);
 281 #ifdef CONFIG_ISDN_AUDIO
 282         skb_queue_purge(&info->dtmf_queue);
 283 #endif
 284 }
 285
 286 static void
 287 isdn_tty_tint(modem_info * info)
 288 {
 289         struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
 290         int len, slen;
 291
 292         if (!skb)
 293                 return;
 294         len = skb->len;
 295         if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
 296                                            info->isdn_channel, 1, skb)) == len) {
 297                 struct tty_struct *tty = info->tty;
 298                 info->send_outstanding++;
 299                 info->msr &= ~UART_MSR_CTS;
 300                 info->lsr &= ~UART_LSR_TEMT;
 301                 tty_wakeup(tty);
 302                 return;
 303         }
 304         if (slen < 0) {
 305                 /* Error: no channel, already shutdown, or wrong parameter */
 306                 dev_kfree_skb(skb);
 307                 return;
 308         }
 309         skb_queue_head(&info->xmit_queue, skb);
 310 }
 311
 312 #ifdef CONFIG_ISDN_AUDIO
 313 static int
 314 isdn_tty_countDLE(unsigned char *buf, int len)
 315 {
 316         int count = 0;
 317
 318         while (len--)
 319                 if (*buf++ == DLE)
 320                         count++;
 321         return count;
 322 }
 323
 324 /* This routine is called from within isdn_tty_write() to perform
 325  * DLE-decoding when sending audio-data.
 326  */
 327 static int
 328 isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
 329 {
 330         unsigned char *p = &info->xmit_buf[info->xmit_count];
 331         int count = 0;
 332
 333         while (len > 0) {
 334                 if (m->lastDLE) {
 335                         m->lastDLE = 0;
 336                         switch (*p) {
 337                                 case DLE:
 338                                         /* Escape code */
 339                                         if (len > 1)
 340                                                 memmove(p, p + 1, len - 1);
 341                                         p--;
 342                                         count++;
 343                                         break;
 344                                 case ETX:
 345                                         /* End of data */
 346                                         info->vonline |= 4;
 347                                         return count;
 348                                 case DC4:
 349                                         /* Abort RX */
 350                                         info->vonline &= ~1;
 351 #ifdef ISDN_DEBUG_MODEM_VOICE
 352                                         printk(KERN_DEBUG
 353                                                "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
 354                                                info->line);
 355 #endif
 356                                         isdn_tty_at_cout("\020\003", info);
 357                                         if (!info->vonline) {
 358 #ifdef ISDN_DEBUG_MODEM_VOICE
 359                                                 printk(KERN_DEBUG
 360                                                        "DLEdown: send VCON on ttyI%d\n",
 361                                                        info->line);
 362 #endif
 363                                                 isdn_tty_at_cout("\r\nVCON\r\n", info);
 364                                         }
 365                                         /* Fall through */
 366                                 case 'q':
 367                                 case 's':
 368                                         /* Silence */
 369                                         if (len > 1)
 370                                                 memmove(p, p + 1, len - 1);
 371                                         p--;
 372                                         break;
 373                         }
 374                 } else {
 375                         if (*p == DLE)
 376                                 m->lastDLE = 1;
 377                         else
 378                                 count++;
 379                 }
 380                 p++;
 381                 len--;
 382         }
 383         if (len < 0) {
 384                 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
 385                 return 0;
 386         }
 387         return count;
 388 }
 389
 390 /* This routine is called from within isdn_tty_write() when receiving
 391  * audio-data. It interrupts receiving, if an character other than
 392  * ^S or ^Q is sent.
 393  */
 394 static int
 395 isdn_tty_end_vrx(const char *buf, int c)
 396 {
 397         char ch;
 398
 399         while (c--) {
 400                 ch = *buf;
 401                 if ((ch != 0x11) && (ch != 0x13))
 402                         return 1;
 403                 buf++;
 404         }
 405         return 0;
 406 }
 407
 408 static int voice_cf[7] =
 409 {0, 0, 4, 3, 2, 0, 0};
 410
 411 #endif                          /* CONFIG_ISDN_AUDIO */
 412
 413 /* isdn_tty_senddown() is called either directly from within isdn_tty_write()
 414  * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
 415  * outgoing data from the tty's xmit-buffer, handles voice-decompression or
 416  * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
 417  */
 418 static void
 419 isdn_tty_senddown(modem_info * info)
 420 {
 421         int buflen;
 422         int skb_res;
 423 #ifdef CONFIG_ISDN_AUDIO
 424         int audio_len;
 425 #endif
 426         struct sk_buff *skb;
 427
 428 #ifdef CONFIG_ISDN_AUDIO
 429         if (info->vonline & 4) {
 430                 info->vonline &= ~6;
 431                 if (!info->vonline) {
 432 #ifdef ISDN_DEBUG_MODEM_VOICE
 433                         printk(KERN_DEBUG
 434                                "senddown: send VCON on ttyI%d\n",
 435                                info->line);
 436 #endif
 437                         isdn_tty_at_cout("\r\nVCON\r\n", info);
 438                 }
 439         }
 440 #endif
 441         if (!(buflen = info->xmit_count))
 442                 return;
 443         if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
 444                 info->msr &= ~UART_MSR_CTS;
 445         info->lsr &= ~UART_LSR_TEMT;
 446         /* info->xmit_count is modified here and in isdn_tty_write().
 447          * So we return here if isdn_tty_write() is in the
 448          * critical section.
 449          */
 450         atomic_inc(&info->xmit_lock);
 451         if (!(atomic_dec_and_test(&info->xmit_lock)))
 452                 return;
 453         if (info->isdn_driver < 0) {
 454                 info->xmit_count = 0;
 455                 return;
 456         }
 457         skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
 458 #ifdef CONFIG_ISDN_AUDIO
 459         if (info->vonline & 2)
 460                 audio_len = buflen * voice_cf[info->emu.vpar[3]];
 461         else
 462                 audio_len = 0;
 463         skb = dev_alloc_skb(skb_res + buflen + audio_len);
 464 #else
 465         skb = dev_alloc_skb(skb_res + buflen);
 466 #endif
 467         if (!skb) {
 468                 printk(KERN_WARNING
 469                        "isdn_tty: Out of memory in ttyI%d senddown\n",
 470                        info->line);
 471                 return;
 472         }
 473         skb_reserve(skb, skb_res);
 474         memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
 475         info->xmit_count = 0;
 476 #ifdef CONFIG_ISDN_AUDIO
 477         if (info->vonline & 2) {
 478                 /* For now, ifmt is fixed to 1 (alaw), since this
 479                  * is used with ISDN everywhere in the world, except
 480                  * US, Canada and Japan.
 481                  * Later, when US-ISDN protocols are implemented,
 482                  * this setting will depend on the D-channel protocol.
 483                  */
 484                 int ifmt = 1;
 485
 486                 /* voice conversion/decompression */
 487                 switch (info->emu.vpar[3]) {
 488                         case 2:
 489                         case 3:
 490                         case 4:
 491                                 /* adpcm, compatible to ZyXel 1496 modem
 492                                  * with ROM revision 6.01
 493                                  */
 494                                 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
 495                                                                   ifmt,
 496                                                                   skb->data,
 497                                                     skb_put(skb, audio_len),
 498                                                                   buflen);
 499                                 skb_pull(skb, buflen);
 500                                 skb_trim(skb, audio_len);
 501                                 break;
 502                         case 5:
 503                                 /* a-law */
 504                                 if (!ifmt)
 505                                         isdn_audio_alaw2ulaw(skb->data,
 506                                                              buflen);
 507                                 break;
 508                         case 6:
 509                                 /* u-law */
 510                                 if (ifmt)
 511                                         isdn_audio_ulaw2alaw(skb->data,
 512                                                              buflen);
 513                                 break;
 514                 }
 515         }
 516 #endif                          /* CONFIG_ISDN_AUDIO */
 517         if (info->emu.mdmreg[REG_T70] & BIT_T70) {
 518                 /* Add T.70 simplified header */
 519                 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
 520                         memcpy(skb_push(skb, 2), "\1\0", 2);
 521                 else
 522                         memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
 523         }
 524         skb_queue_tail(&info->xmit_queue, skb);
 525 }
 526
 527 /************************************************************
 528  *
 529  * Modem-functions
 530  *
 531  * mostly "stolen" from original Linux-serial.c and friends.
 532  *
 533  ************************************************************/
 534
 535 /* The next routine is called once from within timer-interrupt
 536  * triggered within isdn_tty_modem_ncarrier(). It calls
 537  * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
 538  * into the tty's buffer.
 539  */
 540 static void
 541 isdn_tty_modem_do_ncarrier(unsigned long data)
 542 {
 543         modem_info *info = (modem_info *) data;
 544         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
 545 }
 546
 547 /* Next routine is called, whenever the DTR-signal is raised.
 548  * It checks the ncarrier-flag, and triggers the above routine
 549  * when necessary. The ncarrier-flag is set, whenever DTR goes
 550  * low.
 551  */
 552 static void
 553 isdn_tty_modem_ncarrier(modem_info * info)
 554 {
 555         if (info->ncarrier) {
 556                 info->nc_timer.expires = jiffies + HZ;
 557                 add_timer(&info->nc_timer);
 558         }
 559 }
 560
 561 /*
 562  * return the usage calculated by si and layer 2 protocol
 563  */
 564 static int
 565 isdn_calc_usage(int si, int l2)
 566 {
 567         int usg = ISDN_USAGE_MODEM;
 568
 569 #ifdef CONFIG_ISDN_AUDIO
 570         if (si == 1) {
 571                 switch(l2) {
 572                         case ISDN_PROTO_L2_MODEM:
 573                                 usg = ISDN_USAGE_MODEM;
 574                                 break;
 575 #ifdef CONFIG_ISDN_TTY_FAX
 576                         case ISDN_PROTO_L2_FAX:
 577                                 usg = ISDN_USAGE_FAX;
 578                                 break;
 579 #endif
 580                         case ISDN_PROTO_L2_TRANS:
 581                         default:
 582                                 usg = ISDN_USAGE_VOICE;
 583                                 break;
 584                 }
 585         }
 586 #endif
 587         return(usg);
 588 }
 589
 590 /* isdn_tty_dial() performs dialing of a tty an the necessary
 591  * setup of the lower levels before that.
 592  */
 593 static void
 594 isdn_tty_dial(char *n, modem_info * info, atemu * m)
 595 {
 596         int usg = ISDN_USAGE_MODEM;
 597         int si = 7;
 598         int l2 = m->mdmreg[REG_L2PROT];
 599         u_long flags;
 600         isdn_ctrl cmd;
 601         int i;
 602         int j;
 603
 604         for (j = 7; j >= 0; j--)
 605                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 606                         si = bit2si[j];
 607                         break;
 608                 }
 609         usg = isdn_calc_usage(si, l2);
 610 #ifdef CONFIG_ISDN_AUDIO
 611         if ((si == 1) &&
 612                 (l2 != ISDN_PROTO_L2_MODEM)
 613 #ifdef CONFIG_ISDN_TTY_FAX
 614                 && (l2 != ISDN_PROTO_L2_FAX)
 615 #endif
 616                 ) {
 617                 l2 = ISDN_PROTO_L2_TRANS;
 618                 usg = ISDN_USAGE_VOICE;
 619         }
 620 #endif
 621         m->mdmreg[REG_SI1I] = si2bit[si];
 622         spin_lock_irqsave(&dev->lock, flags);
 623         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 624         if (i < 0) {
 625                 spin_unlock_irqrestore(&dev->lock, flags);
 626                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 627         } else {
 628                 info->isdn_driver = dev->drvmap[i];
 629                 info->isdn_channel = dev->chanmap[i];
 630                 info->drv_index = i;
 631                 dev->m_idx[i] = info->line;
 632                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 633                 info->last_dir = 1;
 634                 strcpy(info->last_num, n);
 635                 isdn_info_update();
 636                 spin_unlock_irqrestore(&dev->lock, flags);
 637                 cmd.driver = info->isdn_driver;
 638                 cmd.arg = info->isdn_channel;
 639                 cmd.command = ISDN_CMD_CLREAZ;
 640                 isdn_command(&cmd);
 641                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 642                 cmd.driver = info->isdn_driver;
 643                 cmd.command = ISDN_CMD_SETEAZ;
 644                 isdn_command(&cmd);
 645                 cmd.driver = info->isdn_driver;
 646                 cmd.command = ISDN_CMD_SETL2;
 647                 info->last_l2 = l2;
 648                 cmd.arg = info->isdn_channel + (l2 << 8);
 649                 isdn_command(&cmd);
 650                 cmd.driver = info->isdn_driver;
 651                 cmd.command = ISDN_CMD_SETL3;
 652                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 653 #ifdef CONFIG_ISDN_TTY_FAX
 654                 if (l2 == ISDN_PROTO_L2_FAX) {
 655                         cmd.parm.fax = info->fax;
 656                         info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
 657                 }
 658 #endif
 659                 isdn_command(&cmd);
 660                 cmd.driver = info->isdn_driver;
 661                 cmd.arg = info->isdn_channel;
 662                 sprintf(cmd.parm.setup.phone, "%s", n);
 663                 sprintf(cmd.parm.setup.eazmsn, "%s",
 664                         isdn_map_eaz2msn(m->msn, info->isdn_driver));
 665                 cmd.parm.setup.si1 = si;
 666                 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
 667                 cmd.command = ISDN_CMD_DIAL;
 668                 info->dialing = 1;
 669                 info->emu.carrierwait = 0;
 670                 strcpy(dev->num[i], n);
 671                 isdn_info_update();
 672                 isdn_command(&cmd);
 673                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
 674         }
 675 }
 676
 677 /* isdn_tty_hangup() disassociates a tty from the real
 678  * ISDN-line (hangup). The usage-status is cleared
 679  * and some cleanup is done also.
 680  */
 681 void
 682 isdn_tty_modem_hup(modem_info * info, int local)
 683 {
 684         isdn_ctrl cmd;
 685         int di, ch;
 686
 687         if (!info)
 688                 return;
 689
 690         di = info->isdn_driver;
 691         ch = info->isdn_channel;
 692         if (di < 0 || ch < 0)
 693                 return;
 694
 695         info->isdn_driver = -1;
 696         info->isdn_channel = -1;
 697
 698 #ifdef ISDN_DEBUG_MODEM_HUP
 699         printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
 700 #endif
 701         info->rcvsched = 0;
 702         isdn_tty_flush_buffer(info->tty);
 703         if (info->online) {
 704                 info->last_lhup = local;
 705                 info->online = 0;
 706                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
 707         }
 708 #ifdef CONFIG_ISDN_AUDIO
 709         info->vonline = 0;
 710 #ifdef CONFIG_ISDN_TTY_FAX
 711         info->faxonline = 0;
 712         info->fax->phase = ISDN_FAX_PHASE_IDLE;
 713 #endif
 714         info->emu.vpar[4] = 0;
 715         info->emu.vpar[5] = 8;
 716         kfree(info->dtmf_state);
 717         info->dtmf_state = NULL;
 718         kfree(info->silence_state);
 719         info->silence_state = NULL;
 720         kfree(info->adpcms);
 721         info->adpcms = NULL;
 722         kfree(info->adpcmr);
 723         info->adpcmr = NULL;
 724 #endif
 725         if ((info->msr & UART_MSR_RI) &&
 726                 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
 727                 isdn_tty_modem_result(RESULT_RUNG, info);
 728         info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
 729         info->lsr |= UART_LSR_TEMT;
 730
 731         if (local) {
 732                 cmd.driver = di;
 733                 cmd.command = ISDN_CMD_HANGUP;
 734                 cmd.arg = ch;
 735                 isdn_command(&cmd);
 736         }
 737
 738         isdn_all_eaz(di, ch);
 739         info->emu.mdmreg[REG_RINGCNT] = 0;
 740         isdn_free_channel(di, ch, 0);
 741
 742         if (info->drv_index >= 0) {
 743                 dev->m_idx[info->drv_index] = -1;
 744                 info->drv_index = -1;
 745         }
 746 }
 747
 748 /*
 749  * Begin of a CAPI like interface, currently used only for
 750  * supplementary service (CAPI 2.0 part III)
 751  */
 752 #include <linux/isdn/capicmd.h>
 753 #include <linux/module.h>
 754
 755 int
 756 isdn_tty_capi_facility(capi_msg *cm) {
 757         return(-1); /* dummy */
 758 }
 759
 760 /* isdn_tty_suspend() tries to suspend the current tty connection
 761  */
 762 static void
 763 isdn_tty_suspend(char *id, modem_info * info, atemu * m)
 764 {
 765         isdn_ctrl cmd;
 766
 767         int l;
 768
 769         if (!info)
 770                 return;
 771
 772 #ifdef ISDN_DEBUG_MODEM_SERVICES
 773         printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
 774 #endif
 775         l = strlen(id);
 776         if ((info->isdn_driver >= 0)) {
 777                 cmd.parm.cmsg.Length = l+18;
 778                 cmd.parm.cmsg.Command = CAPI_FACILITY;
 779                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 780                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 781                 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
 782                 cmd.parm.cmsg.para[1] = 0;
 783                 cmd.parm.cmsg.para[2] = l + 3;
 784                 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
 785                 cmd.parm.cmsg.para[4] = 0;
 786                 cmd.parm.cmsg.para[5] = l;
 787                 strncpy(&cmd.parm.cmsg.para[6], id, l);
 788                 cmd.command = CAPI_PUT_MESSAGE;
 789                 cmd.driver = info->isdn_driver;
 790                 cmd.arg = info->isdn_channel;
 791                 isdn_command(&cmd);
 792         }
 793 }
 794
 795 /* isdn_tty_resume() tries to resume a suspended call
 796  * setup of the lower levels before that. unfortunately here is no
 797  * checking for compatibility of used protocols implemented by Q931
 798  * It does the same things like isdn_tty_dial, the last command
 799  * is different, may be we can merge it.
 800  */
 801
 802 static void
 803 isdn_tty_resume(char *id, modem_info * info, atemu * m)
 804 {
 805         int usg = ISDN_USAGE_MODEM;
 806         int si = 7;
 807         int l2 = m->mdmreg[REG_L2PROT];
 808         isdn_ctrl cmd;
 809         ulong flags;
 810         int i;
 811         int j;
 812         int l;
 813
 814         l = strlen(id);
 815         for (j = 7; j >= 0; j--)
 816                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 817                         si = bit2si[j];
 818                         break;
 819                 }
 820         usg = isdn_calc_usage(si, l2);
 821 #ifdef CONFIG_ISDN_AUDIO
 822         if ((si == 1) &&
 823                 (l2 != ISDN_PROTO_L2_MODEM)
 824 #ifdef CONFIG_ISDN_TTY_FAX
 825                 && (l2 != ISDN_PROTO_L2_FAX)
 826 #endif
 827                 ) {
 828                 l2 = ISDN_PROTO_L2_TRANS;
 829                 usg = ISDN_USAGE_VOICE;
 830         }
 831 #endif
 832         m->mdmreg[REG_SI1I] = si2bit[si];
 833         spin_lock_irqsave(&dev->lock, flags);
 834         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 835         if (i < 0) {
 836                 spin_unlock_irqrestore(&dev->lock, flags);
 837                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 838         } else {
 839                 info->isdn_driver = dev->drvmap[i];
 840                 info->isdn_channel = dev->chanmap[i];
 841                 info->drv_index = i;
 842                 dev->m_idx[i] = info->line;
 843                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 844                 info->last_dir = 1;
 845 //              strcpy(info->last_num, n);
 846                 isdn_info_update();
 847                 spin_unlock_irqrestore(&dev->lock, flags);
 848                 cmd.driver = info->isdn_driver;
 849                 cmd.arg = info->isdn_channel;
 850                 cmd.command = ISDN_CMD_CLREAZ;
 851                 isdn_command(&cmd);
 852                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 853                 cmd.driver = info->isdn_driver;
 854                 cmd.command = ISDN_CMD_SETEAZ;
 855                 isdn_command(&cmd);
 856                 cmd.driver = info->isdn_driver;
 857                 cmd.command = ISDN_CMD_SETL2;
 858                 info->last_l2 = l2;
 859                 cmd.arg = info->isdn_channel + (l2 << 8);
 860                 isdn_command(&cmd);
 861                 cmd.driver = info->isdn_driver;
 862                 cmd.command = ISDN_CMD_SETL3;
 863                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 864                 isdn_command(&cmd);
 865                 cmd.driver = info->isdn_driver;
 866                 cmd.arg = info->isdn_channel;
 867                 cmd.parm.cmsg.Length = l+18;
 868                 cmd.parm.cmsg.Command = CAPI_FACILITY;
 869                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 870                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 871                 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
 872                 cmd.parm.cmsg.para[1] = 0;
 873                 cmd.parm.cmsg.para[2] = l+3;
 874                 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
 875                 cmd.parm.cmsg.para[4] = 0;
 876                 cmd.parm.cmsg.para[5] = l;
 877                 strncpy(&cmd.parm.cmsg.para[6], id, l);
 878                 cmd.command =CAPI_PUT_MESSAGE;
 879                 info->dialing = 1;
 880 //              strcpy(dev->num[i], n);
 881                 isdn_info_update();
 882                 isdn_command(&cmd);
 883                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
 884         }
 885 }
 886
 887 /* isdn_tty_send_msg() sends a message to a HL driver
 888  * This is used for hybrid modem cards to send AT commands to it
 889  */
 890
 891 static void
 892 isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
 893 {
 894         int usg = ISDN_USAGE_MODEM;
 895         int si = 7;
 896         int l2 = m->mdmreg[REG_L2PROT];
 897         isdn_ctrl cmd;
 898         ulong flags;
 899         int i;
 900         int j;
 901         int l;
 902
 903         l = strlen(msg);
 904         if (!l) {
 905                 isdn_tty_modem_result(RESULT_ERROR, info);
 906                 return;
 907         }
 908         for (j = 7; j >= 0; j--)
 909                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 910                         si = bit2si[j];
 911                         break;
 912                 }
 913         usg = isdn_calc_usage(si, l2);
 914 #ifdef CONFIG_ISDN_AUDIO
 915         if ((si == 1) &&
 916                 (l2 != ISDN_PROTO_L2_MODEM)
 917 #ifdef CONFIG_ISDN_TTY_FAX
 918                 && (l2 != ISDN_PROTO_L2_FAX)
 919 #endif
 920                 ) {
 921                 l2 = ISDN_PROTO_L2_TRANS;
 922                 usg = ISDN_USAGE_VOICE;
 923         }
 924 #endif
 925         m->mdmreg[REG_SI1I] = si2bit[si];
 926         spin_lock_irqsave(&dev->lock, flags);
 927         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 928         if (i < 0) {
 929                 spin_unlock_irqrestore(&dev->lock, flags);
 930                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 931         } else {
 932                 info->isdn_driver = dev->drvmap[i];
 933                 info->isdn_channel = dev->chanmap[i];
 934                 info->drv_index = i;
 935                 dev->m_idx[i] = info->line;
 936                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 937                 info->last_dir = 1;
 938                 isdn_info_update();
 939                 spin_unlock_irqrestore(&dev->lock, flags);
 940                 cmd.driver = info->isdn_driver;
 941                 cmd.arg = info->isdn_channel;
 942                 cmd.command = ISDN_CMD_CLREAZ;
 943                 isdn_command(&cmd);
 944                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 945                 cmd.driver = info->isdn_driver;
 946                 cmd.command = ISDN_CMD_SETEAZ;
 947                 isdn_command(&cmd);
 948                 cmd.driver = info->isdn_driver;
 949                 cmd.command = ISDN_CMD_SETL2;
 950                 info->last_l2 = l2;
 951                 cmd.arg = info->isdn_channel + (l2 << 8);
 952                 isdn_command(&cmd);
 953                 cmd.driver = info->isdn_driver;
 954                 cmd.command = ISDN_CMD_SETL3;
 955                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 956                 isdn_command(&cmd);
 957                 cmd.driver = info->isdn_driver;
 958                 cmd.arg = info->isdn_channel;
 959                 cmd.parm.cmsg.Length = l+14;
 960                 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
 961                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 962                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 963                 cmd.parm.cmsg.para[0] = l+1;
 964                 strncpy(&cmd.parm.cmsg.para[1], msg, l);
 965                 cmd.parm.cmsg.para[l+1] = 0xd;
 966                 cmd.command =CAPI_PUT_MESSAGE;
 967 /*              info->dialing = 1;
 968                 strcpy(dev->num[i], n);
 969                 isdn_info_update();
 970 */
 971                 isdn_command(&cmd);
 972         }
 973 }
 974
 975 static inline int
 976 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
 977 {
 978 #ifdef MODEM_PARANOIA_CHECK
 979         if (!info) {
 980                 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
 981                         name, routine);
 982                 return 1;
 983         }
 984         if (info->magic != ISDN_ASYNC_MAGIC) {
 985                 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
 986                        name, routine);
 987                 return 1;
 988         }
 989 #endif
 990         return 0;
 991 }
 992
 993 /*
 994  * This routine is called to set the UART divisor registers to match
 995  * the specified baud rate for a serial port.
 996  */
 997 static void
 998 isdn_tty_change_speed(modem_info * info)
 999 {
1000         uint cflag,
1001          cval,
1002          quot;
1003         int i;
1004
1005         if (!info->tty || !info->tty->termios)
1006                 return;
1007         cflag = info->tty->termios->c_cflag;
1008
1009         quot = i = cflag & CBAUD;
1010         if (i & CBAUDEX) {
1011                 i &= ~CBAUDEX;
1012                 if (i < 1 || i > 2)
1013                         info->tty->termios->c_cflag &= ~CBAUDEX;
1014                 else
1015                         i += 15;
1016         }
1017         if (quot) {
1018                 info->mcr |= UART_MCR_DTR;
1019                 isdn_tty_modem_ncarrier(info);
1020         } else {
1021                 info->mcr &= ~UART_MCR_DTR;
1022                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1023 #ifdef ISDN_DEBUG_MODEM_HUP
1024                         printk(KERN_DEBUG "Mhup in changespeed\n");
1025 #endif
1026                         if (info->online)
1027                                 info->ncarrier = 1;
1028                         isdn_tty_modem_reset_regs(info, 0);
1029                         isdn_tty_modem_hup(info, 1);
1030                 }
1031                 return;
1032         }
1033         /* byte size and parity */
1034         cval = cflag & (CSIZE | CSTOPB);
1035         cval >>= 4;
1036         if (cflag & PARENB)
1037                 cval |= UART_LCR_PARITY;
1038         if (!(cflag & PARODD))
1039                 cval |= UART_LCR_EPAR;
1040
1041         /* CTS flow control flag and modem status interrupts */
1042         if (cflag & CRTSCTS) {
1043                 info->flags |= ISDN_ASYNC_CTS_FLOW;
1044         } else
1045                 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1046         if (cflag & CLOCAL)
1047                 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1048         else {
1049                 info->flags |= ISDN_ASYNC_CHECK_CD;
1050         }
1051 }
1052
1053 static int
1054 isdn_tty_startup(modem_info * info)
1055 {
1056         if (info->flags & ISDN_ASYNC_INITIALIZED)
1057                 return 0;
1058         isdn_lock_drivers();
1059 #ifdef ISDN_DEBUG_MODEM_OPEN
1060         printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1061 #endif
1062         /*
1063          * Now, initialize the UART
1064          */
1065         info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1066         if (info->tty)
1067                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1068         /*
1069          * and set the speed of the serial port
1070          */
1071         isdn_tty_change_speed(info);
1072
1073         info->flags |= ISDN_ASYNC_INITIALIZED;
1074         info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1075         info->send_outstanding = 0;
1076         return 0;
1077 }
1078
1079 /*
1080  * This routine will shutdown a serial port; interrupts are disabled, and
1081  * DTR is dropped if the hangup on close termio flag is on.
1082  */
1083 static void
1084 isdn_tty_shutdown(modem_info * info)
1085 {
1086         if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1087                 return;
1088 #ifdef ISDN_DEBUG_MODEM_OPEN
1089         printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1090 #endif
1091         isdn_unlock_drivers();
1092         info->msr &= ~UART_MSR_RI;
1093         if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1094                 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1095                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1096                         isdn_tty_modem_reset_regs(info, 0);
1097 #ifdef ISDN_DEBUG_MODEM_HUP
1098                         printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1099 #endif
1100                         isdn_tty_modem_hup(info, 1);
1101                 }
1102         }
1103         if (info->tty)
1104                 set_bit(TTY_IO_ERROR, &info->tty->flags);
1105
1106         info->flags &= ~ISDN_ASYNC_INITIALIZED;
1107 }
1108
1109 /* isdn_tty_write() is the main send-routine. It is called from the upper
1110  * levels within the kernel to perform sending data. Depending on the
1111  * online-flag it either directs output to the at-command-interpreter or
1112  * to the lower level. Additional tasks done here:
1113  *  - If online, check for escape-sequence (+++)
1114  *  - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1115  *  - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1116  *  - If dialing, abort dial.
1117  */
1118 static int
1119 isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
1120 {
1121         int c;
1122         int total = 0;
1123         modem_info *info = (modem_info *) tty->driver_data;
1124         atemu *m = &info->emu;
1125
1126         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1127                 return 0;
1128         /* See isdn_tty_senddown() */
1129         atomic_inc(&info->xmit_lock);
1130         while (1) {
1131                 c = count;
1132                 if (c > info->xmit_size - info->xmit_count)
1133                         c = info->xmit_size - info->xmit_count;
1134                 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1135                         c = dev->drv[info->isdn_driver]->maxbufsize;
1136                 if (c <= 0)
1137                         break;
1138                 if ((info->online > 1)
1139 #ifdef CONFIG_ISDN_AUDIO
1140                     || (info->vonline & 3)
1141 #endif
1142                         ) {
1143 #ifdef CONFIG_ISDN_AUDIO
1144                         if (!info->vonline)
1145 #endif
1146                                 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1147                                                    &(m->pluscount),
1148                                                    &(m->lastplus));
1149                         memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1150 #ifdef CONFIG_ISDN_AUDIO
1151                         if (info->vonline) {
1152                                 int cc = isdn_tty_handleDLEdown(info, m, c);
1153                                 if (info->vonline & 2) {
1154                                         if (!cc) {
1155                                                 /* If DLE decoding results in zero-transmit, but
1156                                                  * c originally was non-zero, do a wakeup.
1157                                                  */
1158                                                 tty_wakeup(tty);
1159                                                 info->msr |= UART_MSR_CTS;
1160                                                 info->lsr |= UART_LSR_TEMT;
1161                                         }
1162                                         info->xmit_count += cc;
1163                                 }
1164                                 if ((info->vonline & 3) == 1) {
1165                                         /* Do NOT handle Ctrl-Q or Ctrl-S
1166                                          * when in full-duplex audio mode.
1167                                          */
1168                                         if (isdn_tty_end_vrx(buf, c)) {
1169                                                 info->vonline &= ~1;
1170 #ifdef ISDN_DEBUG_MODEM_VOICE
1171                                                 printk(KERN_DEBUG
1172                                                        "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1173                                                        info->line);
1174 #endif
1175                                                 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1176                                         }
1177                                 }
1178                         } else
1179                         if (TTY_IS_FCLASS1(info)) {
1180                                 int cc = isdn_tty_handleDLEdown(info, m, c);
1181
1182                                 if (info->vonline & 4) { /* ETX seen */
1183                                         isdn_ctrl c;
1184
1185                                         c.command = ISDN_CMD_FAXCMD;
1186                                         c.driver = info->isdn_driver;
1187                                         c.arg = info->isdn_channel;
1188                                         c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1189                                         c.parm.aux.subcmd = ETX;
1190                                         isdn_command(&c);
1191                                 }
1192                                 info->vonline = 0;
1193 #ifdef ISDN_DEBUG_MODEM_VOICE
1194                                 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1195 #endif
1196                                 info->xmit_count += cc;
1197                         } else
1198 #endif
1199                                 info->xmit_count += c;
1200                 } else {
1201                         info->msr |= UART_MSR_CTS;
1202                         info->lsr |= UART_LSR_TEMT;
1203                         if (info->dialing) {
1204                                 info->dialing = 0;
1205 #ifdef ISDN_DEBUG_MODEM_HUP
1206                                 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1207 #endif
1208                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1209                                 isdn_tty_modem_hup(info, 1);
1210                         } else
1211                                 c = isdn_tty_edit_at(buf, c, info);
1212                 }
1213                 buf += c;
1214                 count -= c;
1215                 total += c;
1216         }
1217         atomic_dec(&info->xmit_lock);
1218         if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1219                 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1220                         isdn_tty_senddown(info);
1221                         isdn_tty_tint(info);
1222                 }
1223                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1224         }
1225         return total;
1226 }
1227
1228 static int
1229 isdn_tty_write_room(struct tty_struct *tty)
1230 {
1231         modem_info *info = (modem_info *) tty->driver_data;
1232         int ret;
1233
1234         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1235                 return 0;
1236         if (!info->online)
1237                 return info->xmit_size;
1238         ret = info->xmit_size - info->xmit_count;
1239         return (ret < 0) ? 0 : ret;
1240 }
1241
1242 static int
1243 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1244 {
1245         modem_info *info = (modem_info *) tty->driver_data;
1246
1247         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1248                 return 0;
1249         if (!info->online)
1250                 return 0;
1251         return (info->xmit_count);
1252 }
1253
1254 static void
1255 isdn_tty_flush_buffer(struct tty_struct *tty)
1256 {
1257         modem_info *info;
1258
1259         if (!tty) {
1260                 return;
1261         }
1262         info = (modem_info *) tty->driver_data;
1263         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1264                 return;
1265         }
1266         isdn_tty_cleanup_xmit(info);
1267         info->xmit_count = 0;
1268         tty_wakeup(tty);
1269 }
1270
1271 static void
1272 isdn_tty_flush_chars(struct tty_struct *tty)
1273 {
1274         modem_info *info = (modem_info *) tty->driver_data;
1275
1276         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1277                 return;
1278         if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1279                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1280 }
1281
1282 /*
1283  * ------------------------------------------------------------
1284  * isdn_tty_throttle()
1285  *
1286  * This routine is called by the upper-layer tty layer to signal that
1287  * incoming characters should be throttled.
1288  * ------------------------------------------------------------
1289  */
1290 static void
1291 isdn_tty_throttle(struct tty_struct *tty)
1292 {
1293         modem_info *info = (modem_info *) tty->driver_data;
1294
1295         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1296                 return;
1297         if (I_IXOFF(tty))
1298                 info->x_char = STOP_CHAR(tty);
1299         info->mcr &= ~UART_MCR_RTS;
1300 }
1301
1302 static void
1303 isdn_tty_unthrottle(struct tty_struct *tty)
1304 {
1305         modem_info *info = (modem_info *) tty->driver_data;
1306
1307         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1308                 return;
1309         if (I_IXOFF(tty)) {
1310                 if (info->x_char)
1311                         info->x_char = 0;
1312                 else
1313                         info->x_char = START_CHAR(tty);
1314         }
1315         info->mcr |= UART_MCR_RTS;
1316 }
1317
1318 /*
1319  * ------------------------------------------------------------
1320  * isdn_tty_ioctl() and friends
1321  * ------------------------------------------------------------
1322  */
1323
1324 /*
1325  * isdn_tty_get_lsr_info - get line status register info
1326  *
1327  * Purpose: Let user call ioctl() to get info when the UART physically
1328  *          is emptied.  On bus types like RS485, the transmitter must
1329  *          release the bus after transmitting. This must be done when
1330  *          the transmit shift register is empty, not be done when the
1331  *          transmit holding register is empty.  This functionality
1332  *          allows RS485 driver to be written in user space.
1333  */
1334 static int
1335 isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1336 {
1337         u_char status;
1338         uint result;
1339
1340         status = info->lsr;
1341         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1342         return put_user(result, value);
1343 }
1344
1345
1346 static int
1347 isdn_tty_tiocmget(struct tty_struct *tty)
1348 {
1349         modem_info *info = (modem_info *) tty->driver_data;
1350         u_char control, status;
1351
1352         if (isdn_tty_paranoia_check(info, tty->name, __func__))
1353                 return -ENODEV;
1354         if (tty->flags & (1 << TTY_IO_ERROR))
1355                 return -EIO;
1356
1357         mutex_lock(&modem_info_mutex);
1358 #ifdef ISDN_DEBUG_MODEM_IOCTL
1359         printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1360 #endif
1361
1362         control = info->mcr;
1363         status = info->msr;
1364         mutex_unlock(&modem_info_mutex);
1365         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1366             | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1367             | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1368             | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1369             | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1370             | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1371 }
1372
1373 static int
1374 isdn_tty_tiocmset(struct tty_struct *tty,
1375                 unsigned int set, unsigned int clear)
1376 {
1377         modem_info *info = (modem_info *) tty->driver_data;
1378
1379         if (isdn_tty_paranoia_check(info, tty->name, __func__))
1380                 return -ENODEV;
1381         if (tty->flags & (1 << TTY_IO_ERROR))
1382                 return -EIO;
1383
1384 #ifdef ISDN_DEBUG_MODEM_IOCTL
1385         printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1386 #endif
1387
1388         mutex_lock(&modem_info_mutex);
1389         if (set & TIOCM_RTS)
1390                 info->mcr |= UART_MCR_RTS;
1391         if (set & TIOCM_DTR) {
1392                 info->mcr |= UART_MCR_DTR;
1393                 isdn_tty_modem_ncarrier(info);
1394         }
1395
1396         if (clear & TIOCM_RTS)
1397                 info->mcr &= ~UART_MCR_RTS;
1398         if (clear & TIOCM_DTR) {
1399                 info->mcr &= ~UART_MCR_DTR;
1400                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1401                         isdn_tty_modem_reset_regs(info, 0);
1402 #ifdef ISDN_DEBUG_MODEM_HUP
1403                         printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1404 #endif
1405                         if (info->online)
1406                                 info->ncarrier = 1;
1407                         isdn_tty_modem_hup(info, 1);
1408                 }
1409         }
1410         mutex_unlock(&modem_info_mutex);
1411         return 0;
1412 }
1413
1414 static int
1415 isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg)
1416 {
1417         modem_info *info = (modem_info *) tty->driver_data;
1418         int retval;
1419
1420         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1421                 return -ENODEV;
1422         if (tty->flags & (1 << TTY_IO_ERROR))
1423                 return -EIO;
1424         switch (cmd) {
1425                 case TCSBRK:   /* SVID version: non-zero arg --> no break */
1426 #ifdef ISDN_DEBUG_MODEM_IOCTL
1427                         printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1428 #endif
1429                         retval = tty_check_change(tty);
1430                         if (retval)
1431                                 return retval;
1432                         tty_wait_until_sent(tty, 0);
1433                         return 0;
1434                 case TCSBRKP:  /* support for POSIX tcsendbreak() */
1435 #ifdef ISDN_DEBUG_MODEM_IOCTL
1436                         printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1437 #endif
1438                         retval = tty_check_change(tty);
1439                         if (retval)
1440                                 return retval;
1441                         tty_wait_until_sent(tty, 0);
1442                         return 0;
1443                 case TIOCSERGETLSR:     /* Get line status register */
1444 #ifdef ISDN_DEBUG_MODEM_IOCTL
1445                         printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1446 #endif
1447                         return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1448                 default:
1449 #ifdef ISDN_DEBUG_MODEM_IOCTL
1450                         printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1451 #endif
1452                         return -ENOIOCTLCMD;
1453         }
1454         return 0;
1455 }
1456
1457 static void
1458 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1459 {
1460         modem_info *info = (modem_info *) tty->driver_data;
1461
1462         if (!old_termios)
1463                 isdn_tty_change_speed(info);
1464         else {
1465                 if (tty->termios->c_cflag == old_termios->c_cflag &&
1466                     tty->termios->c_ispeed == old_termios->c_ispeed &&
1467                     tty->termios->c_ospeed == old_termios->c_ospeed)
1468                         return;
1469                 isdn_tty_change_speed(info);
1470                 if ((old_termios->c_cflag & CRTSCTS) &&
1471                     !(tty->termios->c_cflag & CRTSCTS))
1472                         tty->hw_stopped = 0;
1473         }
1474 }
1475
1476 /*
1477  * ------------------------------------------------------------
1478  * isdn_tty_open() and friends
1479  * ------------------------------------------------------------
1480  */
1481 static int
1482 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1483 {
1484         DECLARE_WAITQUEUE(wait, NULL);
1485         int do_clocal = 0;
1486         int retval;
1487
1488         /*
1489          * If the device is in the middle of being closed, then block
1490          * until it's done, and then try again.
1491          */
1492         if (tty_hung_up_p(filp) ||
1493             (info->flags & ISDN_ASYNC_CLOSING)) {
1494                 if (info->flags & ISDN_ASYNC_CLOSING)
1495                         interruptible_sleep_on(&info->close_wait);
1496 #ifdef MODEM_DO_RESTART
1497                 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1498                         return -EAGAIN;
1499                 else
1500                         return -ERESTARTSYS;
1501 #else
1502                 return -EAGAIN;
1503 #endif
1504         }
1505         /*
1506          * If non-blocking mode is set, then make the check up front
1507          * and then exit.
1508          */
1509         if ((filp->f_flags & O_NONBLOCK) ||
1510             (tty->flags & (1 << TTY_IO_ERROR))) {
1511                 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1512                         return -EBUSY;
1513                 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1514                 return 0;
1515         }
1516         if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1517                 if (info->normal_termios.c_cflag & CLOCAL)
1518                         do_clocal = 1;
1519         } else {
1520                 if (tty->termios->c_cflag & CLOCAL)
1521                         do_clocal = 1;
1522         }
1523         /*
1524          * Block waiting for the carrier detect and the line to become
1525          * free (i.e., not in use by the callout).  While we are in
1526          * this loop, info->count is dropped by one, so that
1527          * isdn_tty_close() knows when to free things.  We restore it upon
1528          * exit, either normal or abnormal.
1529          */
1530         retval = 0;
1531         add_wait_queue(&info->open_wait, &wait);
1532 #ifdef ISDN_DEBUG_MODEM_OPEN
1533         printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1534                info->line, info->count);
1535 #endif
1536         if (!(tty_hung_up_p(filp)))
1537                 info->count--;
1538         info->blocked_open++;
1539         while (1) {
1540                 set_current_state(TASK_INTERRUPTIBLE);
1541                 if (tty_hung_up_p(filp) ||
1542                     !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1543 #ifdef MODEM_DO_RESTART
1544                         if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1545                                 retval = -EAGAIN;
1546                         else
1547                                 retval = -ERESTARTSYS;
1548 #else
1549                         retval = -EAGAIN;
1550 #endif
1551                         break;
1552                 }
1553                 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1554                     !(info->flags & ISDN_ASYNC_CLOSING) &&
1555                     (do_clocal || (info->msr & UART_MSR_DCD))) {
1556                         break;
1557                 }
1558                 if (signal_pending(current)) {
1559                         retval = -ERESTARTSYS;
1560                         break;
1561                 }
1562 #ifdef ISDN_DEBUG_MODEM_OPEN
1563                 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1564                        info->line, info->count);
1565 #endif
1566                 schedule();
1567         }
1568         current->state = TASK_RUNNING;
1569         remove_wait_queue(&info->open_wait, &wait);
1570         if (!tty_hung_up_p(filp))
1571                 info->count++;
1572         info->blocked_open--;
1573 #ifdef ISDN_DEBUG_MODEM_OPEN
1574         printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1575                info->line, info->count);
1576 #endif
1577         if (retval)
1578                 return retval;
1579         info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1580         return 0;
1581 }
1582
1583 /*
1584  * This routine is called whenever a serial port is opened.  It
1585  * enables interrupts for a serial port, linking in its async structure into
1586  * the IRQ chain.   It also performs the serial-specific
1587  * initialization for the tty structure.
1588  */
1589 static int
1590 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1591 {
1592         modem_info *info;
1593         int retval, line;
1594
1595         line = tty->index;
1596         if (line < 0 || line >= ISDN_MAX_CHANNELS)
1597                 return -ENODEV;
1598         info = &dev->mdm.info[line];
1599         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1600                 return -ENODEV;
1601         if (!try_module_get(info->owner)) {
1602                 printk(KERN_WARNING "%s: cannot reserve module\n", __func__);
1603                 return -ENODEV;
1604         }
1605 #ifdef ISDN_DEBUG_MODEM_OPEN
1606         printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1607                info->count);
1608 #endif
1609         info->count++;
1610         tty->driver_data = info;
1611         info->tty = tty;
1612         /*
1613          * Start up serial port
1614          */
1615         retval = isdn_tty_startup(info);
1616         if (retval) {
1617 #ifdef ISDN_DEBUG_MODEM_OPEN
1618                 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1619 #endif
1620                 module_put(info->owner);
1621                 return retval;
1622         }
1623         retval = isdn_tty_block_til_ready(tty, filp, info);
1624         if (retval) {
1625 #ifdef ISDN_DEBUG_MODEM_OPEN
1626                 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1627 #endif
1628                 module_put(info->owner);
1629                 return retval;
1630         }
1631 #ifdef ISDN_DEBUG_MODEM_OPEN
1632         printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1633 #endif
1634         dev->modempoll++;
1635 #ifdef ISDN_DEBUG_MODEM_OPEN
1636         printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1637 #endif
1638         return 0;
1639 }
1640
1641 static void
1642 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1643 {
1644         modem_info *info = (modem_info *) tty->driver_data;
1645         ulong timeout;
1646
1647         if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1648                 return;
1649         if (tty_hung_up_p(filp)) {
1650 #ifdef ISDN_DEBUG_MODEM_OPEN
1651                 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1652 #endif
1653                 return;
1654         }
1655         if ((tty->count == 1) && (info->count != 1)) {
1656                 /*
1657                  * Uh, oh.  tty->count is 1, which means that the tty
1658                  * structure will be freed.  Info->count should always
1659                  * be one in these conditions.  If it's greater than
1660                  * one, we've got real problems, since it means the
1661                  * serial port won't be shutdown.
1662                  */
1663                 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1664                        "info->count is %d\n", info->count);
1665                 info->count = 1;
1666         }
1667         if (--info->count < 0) {
1668                 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1669                        info->line, info->count);
1670                 info->count = 0;
1671         }
1672         if (info->count) {
1673 #ifdef ISDN_DEBUG_MODEM_OPEN
1674                 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1675 #endif
1676                 module_put(info->owner);
1677                 return;
1678         }
1679         info->flags |= ISDN_ASYNC_CLOSING;
1680         /*
1681          * Save the termios structure, since this port may have
1682          * separate termios for callout and dialin.
1683          */
1684         if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1685                 info->normal_termios = *tty->termios;
1686         if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1687                 info->callout_termios = *tty->termios;
1688
1689         tty->closing = 1;
1690         /*
1691          * At this point we stop accepting input.  To do this, we
1692          * disable the receive line status interrupts, and tell the
1693          * interrupt driver to stop checking the data ready bit in the
1694          * line status register.
1695          */
1696         if (info->flags & ISDN_ASYNC_INITIALIZED) {
1697                 tty_wait_until_sent_from_close(tty, 3000);      /* 30 seconds timeout */
1698                 /*
1699                  * Before we drop DTR, make sure the UART transmitter
1700                  * has completely drained; this is especially
1701                  * important if there is a transmit FIFO!
1702                  */
1703                 timeout = jiffies + HZ;
1704                 while (!(info->lsr & UART_LSR_TEMT)) {
1705                         schedule_timeout_interruptible(20);
1706                         if (time_after(jiffies,timeout))
1707                                 break;
1708                 }
1709         }
1710         dev->modempoll--;
1711         isdn_tty_shutdown(info);
1712         isdn_tty_flush_buffer(tty);
1713         tty_ldisc_flush(tty);
1714         info->tty = NULL;
1715         info->ncarrier = 0;
1716         tty->closing = 0;
1717         module_put(info->owner);
1718         if (info->blocked_open) {
1719                 msleep_interruptible(500);
1720                 wake_up_interruptible(&info->open_wait);
1721         }
1722         info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1723         wake_up_interruptible(&info->close_wait);
1724 #ifdef ISDN_DEBUG_MODEM_OPEN
1725         printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1726 #endif
1727 }
1728
1729 /*
1730  * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1731  */
1732 static void
1733 isdn_tty_hangup(struct tty_struct *tty)
1734 {
1735         modem_info *info = (modem_info *) tty->driver_data;
1736
1737         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1738                 return;
1739         isdn_tty_shutdown(info);
1740         info->count = 0;
1741         info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1742         info->tty = NULL;
1743         wake_up_interruptible(&info->open_wait);
1744 }
1745
1746 /* This routine initializes all emulator-data.
1747  */
1748 static void
1749 isdn_tty_reset_profile(atemu * m)
1750 {
1751         m->profile[0] = 0;
1752         m->profile[1] = 0;
1753         m->profile[2] = 43;
1754         m->profile[3] = 13;
1755         m->profile[4] = 10;
1756         m->profile[5] = 8;
1757         m->profile[6] = 3;
1758         m->profile[7] = 60;
1759         m->profile[8] = 2;
1760         m->profile[9] = 6;
1761         m->profile[10] = 7;
1762         m->profile[11] = 70;
1763         m->profile[12] = 0x45;
1764         m->profile[13] = 4;
1765         m->profile[14] = ISDN_PROTO_L2_X75I;
1766         m->profile[15] = ISDN_PROTO_L3_TRANS;
1767         m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1768         m->profile[17] = ISDN_MODEM_WINSIZE;
1769         m->profile[18] = 4;
1770         m->profile[19] = 0;
1771         m->profile[20] = 0;
1772         m->profile[23] = 0;
1773         m->pmsn[0] = '\0';
1774         m->plmsn[0] = '\0';
1775 }
1776
1777 #ifdef CONFIG_ISDN_AUDIO
1778 static void
1779 isdn_tty_modem_reset_vpar(atemu * m)
1780 {
1781         m->vpar[0] = 2;         /* Voice-device            (2 = phone line) */
1782         m->vpar[1] = 0;         /* Silence detection level (0 = none      ) */
1783         m->vpar[2] = 70;        /* Silence interval        (7 sec.        ) */
1784         m->vpar[3] = 2;         /* Compression type        (1 = ADPCM-2   ) */
1785         m->vpar[4] = 0;         /* DTMF detection level    (0 = softcode  ) */
1786         m->vpar[5] = 8;         /* DTMF interval           (8 * 5 ms.     ) */
1787 }
1788 #endif
1789
1790 #ifdef CONFIG_ISDN_TTY_FAX
1791 static void
1792 isdn_tty_modem_reset_faxpar(modem_info * info)
1793 {
1794         T30_s *f = info->fax;
1795
1796         f->code = 0;
1797         f->phase = ISDN_FAX_PHASE_IDLE;
1798         f->direction = 0;
1799         f->resolution = 1;      /* fine */
1800         f->rate = 5;            /* 14400 bit/s */
1801         f->width = 0;
1802         f->length = 0;
1803         f->compression = 0;
1804         f->ecm = 0;
1805         f->binary = 0;
1806         f->scantime = 0;
1807         memset(&f->id[0], 32, FAXIDLEN - 1);
1808         f->id[FAXIDLEN - 1] = 0;
1809         f->badlin = 0;
1810         f->badmul = 0;
1811         f->bor = 0;
1812         f->nbc = 0;
1813         f->cq = 0;
1814         f->cr = 0;
1815         f->ctcrty = 0;
1816         f->minsp = 0;
1817         f->phcto = 30;
1818         f->rel = 0;
1819         memset(&f->pollid[0], 32, FAXIDLEN - 1);
1820         f->pollid[FAXIDLEN - 1] = 0;
1821 }
1822 #endif
1823
1824 static void
1825 isdn_tty_modem_reset_regs(modem_info * info, int force)
1826 {
1827         atemu *m = &info->emu;
1828         if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1829                 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1830                 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1831                 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1832                 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1833         }
1834 #ifdef CONFIG_ISDN_AUDIO
1835         isdn_tty_modem_reset_vpar(m);
1836 #endif
1837 #ifdef CONFIG_ISDN_TTY_FAX
1838         isdn_tty_modem_reset_faxpar(info);
1839 #endif
1840         m->mdmcmdl = 0;
1841 }
1842
1843 static void
1844 modem_write_profile(atemu * m)
1845 {
1846         memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1847         memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1848         memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1849         if (dev->profd)
1850                 send_sig(SIGIO, dev->profd, 1);
1851 }
1852
1853 static const struct tty_operations modem_ops = {
1854         .open = isdn_tty_open,
1855         .close = isdn_tty_close,
1856         .write = isdn_tty_write,
1857         .flush_chars = isdn_tty_flush_chars,
1858         .write_room = isdn_tty_write_room,
1859         .chars_in_buffer = isdn_tty_chars_in_buffer,
1860         .flush_buffer = isdn_tty_flush_buffer,
1861         .ioctl = isdn_tty_ioctl,
1862         .throttle = isdn_tty_throttle,
1863         .unthrottle = isdn_tty_unthrottle,
1864         .set_termios = isdn_tty_set_termios,
1865         .hangup = isdn_tty_hangup,
1866         .tiocmget = isdn_tty_tiocmget,
1867         .tiocmset = isdn_tty_tiocmset,
1868 };
1869
1870 int
1871 isdn_tty_modem_init(void)
1872 {
1873         isdn_modem_t    *m;
1874         int             i, retval;
1875         modem_info      *info;
1876
1877         m = &dev->mdm;
1878         m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1879         if (!m->tty_modem)
1880                 return -ENOMEM;
1881         m->tty_modem->name = "ttyI";
1882         m->tty_modem->major = ISDN_TTY_MAJOR;
1883         m->tty_modem->minor_start = 0;
1884         m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1885         m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1886         m->tty_modem->init_termios = tty_std_termios;
1887         m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1888         m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1889         m->tty_modem->driver_name = "isdn_tty";
1890         tty_set_operations(m->tty_modem, &modem_ops);
1891         retval = tty_register_driver(m->tty_modem);
1892         if (retval) {
1893                 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1894                 goto err;
1895         }
1896         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1897                 info = &m->info[i];
1898 #ifdef CONFIG_ISDN_TTY_FAX
1899                 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1900                         printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1901                         retval = -ENOMEM;
1902                         goto err_unregister;
1903                 }
1904 #endif
1905 #ifdef MODULE
1906                 info->owner = THIS_MODULE;
1907 #endif
1908                 spin_lock_init(&info->readlock);
1909                 sprintf(info->last_cause, "0000");
1910                 sprintf(info->last_num, "none");
1911                 info->last_dir = 0;
1912                 info->last_lhup = 1;
1913                 info->last_l2 = -1;
1914                 info->last_si = 0;
1915                 isdn_tty_reset_profile(&info->emu);
1916                 isdn_tty_modem_reset_regs(info, 1);
1917                 info->magic = ISDN_ASYNC_MAGIC;
1918                 info->line = i;
1919                 info->tty = NULL;
1920                 info->x_char = 0;
1921                 info->count = 0;
1922                 info->blocked_open = 0;
1923                 init_waitqueue_head(&info->open_wait);
1924                 init_waitqueue_head(&info->close_wait);
1925                 info->isdn_driver = -1;
1926                 info->isdn_channel = -1;
1927                 info->drv_index = -1;
1928                 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1929                 init_timer(&info->nc_timer);
1930                 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1931                 info->nc_timer.data = (unsigned long) info;
1932                 skb_queue_head_init(&info->xmit_queue);
1933 #ifdef CONFIG_ISDN_AUDIO
1934                 skb_queue_head_init(&info->dtmf_queue);
1935 #endif
1936                 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1937                         printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1938                         retval = -ENOMEM;
1939                         goto err_unregister;
1940                 }
1941                 /* Make room for T.70 header */
1942                 info->xmit_buf += 4;
1943         }
1944         return 0;
1945 err_unregister:
1946         for (i--; i >= 0; i--) {
1947                 info = &m->info[i];
1948 #ifdef CONFIG_ISDN_TTY_FAX
1949                 kfree(info->fax);
1950 #endif
1951                 kfree(info->xmit_buf - 4);
1952         }
1953         tty_unregister_driver(m->tty_modem);
1954  err:
1955         put_tty_driver(m->tty_modem);
1956         m->tty_modem = NULL;
1957         return retval;
1958 }
1959
1960 void
1961 isdn_tty_exit(void)
1962 {
1963         modem_info *info;
1964         int i;
1965
1966         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1967                 info = &dev->mdm.info[i];
1968                 isdn_tty_cleanup_xmit(info);
1969 #ifdef CONFIG_ISDN_TTY_FAX
1970                 kfree(info->fax);
1971 #endif
1972                 kfree(info->xmit_buf - 4);
1973         }
1974         tty_unregister_driver(dev->mdm.tty_modem);
1975         put_tty_driver(dev->mdm.tty_modem);
1976         dev->mdm.tty_modem = NULL;
1977 }
1978
1979
1980 /*
1981  * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1982  *      match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1983  *      and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1984  */
1985
1986 static int
1987 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1988 {
1989 #ifdef ISDN_DEBUG_MODEM_ICALL
1990         printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1991                emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1992                emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1993 #endif
1994         if (strlen(emu->lmsn)) {
1995                 char *p = emu->lmsn;
1996                 char *q;
1997                 int  tmp;
1998                 int  ret = 0;
1999
2000                 while (1) {
2001                         if ((q = strchr(p, ';')))
2002                                 *q = '\0';
2003                         if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2004                                 ret = tmp;
2005 #ifdef ISDN_DEBUG_MODEM_ICALL
2006                         printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2007                                p, isdn_map_eaz2msn(emu->msn, di), tmp);
2008 #endif
2009                         if (q) {
2010                                 *q = ';';
2011                                 p = q;
2012                                 p++;
2013                         }
2014                         if (!tmp)
2015                                 return 0;
2016                         if (!q)
2017                                 break;
2018                 }
2019                 return ret;
2020         } else {
2021                 int tmp;
2022                 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2023 #ifdef ISDN_DEBUG_MODEM_ICALL
2024                         printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2025                                isdn_map_eaz2msn(emu->msn, di), tmp);
2026 #endif
2027                 return tmp;
2028         }
2029 }
2030
2031 /*
2032  * An incoming call-request has arrived.
2033  * Search the tty-devices for an appropriate device and bind
2034  * it to the ISDN-Channel.
2035  * Return:
2036  *
2037  *  0 = No matching device found.
2038  *  1 = A matching device found.
2039  *  3 = No match found, but eventually would match, if
2040  *      CID is longer.
2041  */
2042 int
2043 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2044 {
2045         char *eaz;
2046         int i;
2047         int wret;
2048         int idx;
2049         int si1;
2050         int si2;
2051         char *nr;
2052         ulong flags;
2053
2054         if (!setup->phone[0]) {
2055                 nr = "0";
2056                 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2057         } else
2058                 nr = setup->phone;
2059         si1 = (int) setup->si1;
2060         si2 = (int) setup->si2;
2061         if (!setup->eazmsn[0]) {
2062                 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2063                 eaz = "0";
2064         } else
2065                 eaz = setup->eazmsn;
2066 #ifdef ISDN_DEBUG_MODEM_ICALL
2067         printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2068 #endif
2069         wret = 0;
2070         spin_lock_irqsave(&dev->lock, flags);
2071         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2072                 modem_info *info = &dev->mdm.info[i];
2073
2074                 if (info->count == 0)
2075                     continue;
2076                 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) &&  /* SI1 is matching */
2077                     (info->emu.mdmreg[REG_SI2] == si2)) {         /* SI2 is matching */
2078                         idx = isdn_dc2minor(di, ch);
2079 #ifdef ISDN_DEBUG_MODEM_ICALL
2080                         printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2081                         printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2082                                info->flags, info->isdn_driver, info->isdn_channel,
2083                                dev->usage[idx]);
2084 #endif
2085                         if (
2086 #ifndef FIX_FILE_TRANSFER
2087                                 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2088 #endif
2089                                 (info->isdn_driver == -1) &&
2090                                 (info->isdn_channel == -1) &&
2091                                 (USG_NONE(dev->usage[idx]))) {
2092                                 int matchret;
2093
2094                                 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2095                                         wret = matchret;
2096                                 if (!matchret) {                  /* EAZ is matching */
2097                                         info->isdn_driver = di;
2098                                         info->isdn_channel = ch;
2099                                         info->drv_index = idx;
2100                                         dev->m_idx[idx] = info->line;
2101                                         dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2102                                         dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2103                                         strcpy(dev->num[idx], nr);
2104                                         strcpy(info->emu.cpn, eaz);
2105                                         info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2106                                         info->emu.mdmreg[REG_PLAN] = setup->plan;
2107                                         info->emu.mdmreg[REG_SCREEN] = setup->screen;
2108                                         isdn_info_update();
2109                                         spin_unlock_irqrestore(&dev->lock, flags);
2110                                         printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2111                                                info->line);
2112                                         info->msr |= UART_MSR_RI;
2113                                         isdn_tty_modem_result(RESULT_RING, info);
2114                                         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2115                                         return 1;
2116                                 }
2117                         }
2118                 }
2119         }
2120         spin_unlock_irqrestore(&dev->lock, flags);
2121         printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2122                ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2123         return (wret == 2)?3:0;
2124 }
2125
2126 #define TTY_IS_ACTIVE(info) \
2127         (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2128
2129 int
2130 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2131 {
2132         int mi;
2133         modem_info *info;
2134         char *e;
2135
2136         if (i < 0)
2137                 return 0;
2138         if ((mi = dev->m_idx[i]) >= 0) {
2139                 info = &dev->mdm.info[mi];
2140                 switch (c->command) {
2141                         case ISDN_STAT_CINF:
2142                                 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2143                                 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2144                                 if (e == (char *)c->parm.num)
2145                                         info->emu.charge = 0;
2146
2147                                 break;
2148                         case ISDN_STAT_BSENT:
2149 #ifdef ISDN_TTY_STAT_DEBUG
2150                                 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2151 #endif
2152                                 if ((info->isdn_driver == c->driver) &&
2153                                     (info->isdn_channel == c->arg)) {
2154                                         info->msr |= UART_MSR_CTS;
2155                                         if (info->send_outstanding)
2156                                                 if (!(--info->send_outstanding))
2157                                                         info->lsr |= UART_LSR_TEMT;
2158                                         isdn_tty_tint(info);
2159                                         return 1;
2160                                 }
2161                                 break;
2162                         case ISDN_STAT_CAUSE:
2163 #ifdef ISDN_TTY_STAT_DEBUG
2164                                 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2165 #endif
2166                                 /* Signal cause to tty-device */
2167                                 strncpy(info->last_cause, c->parm.num, 5);
2168                                 return 1;
2169                         case ISDN_STAT_DISPLAY:
2170 #ifdef ISDN_TTY_STAT_DEBUG
2171                                 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2172 #endif
2173                                 /* Signal display to tty-device */
2174                                 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2175                                         !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2176                                   isdn_tty_at_cout("\r\n", info);
2177                                   isdn_tty_at_cout("DISPLAY: ", info);
2178                                   isdn_tty_at_cout(c->parm.display, info);
2179                                   isdn_tty_at_cout("\r\n", info);
2180                                 }
2181                                 return 1;
2182                         case ISDN_STAT_DCONN:
2183 #ifdef ISDN_TTY_STAT_DEBUG
2184                                 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2185 #endif
2186                                 if (TTY_IS_ACTIVE(info)) {
2187                                         if (info->dialing == 1) {
2188                                                 info->dialing = 2;
2189                                                 return 1;
2190                                         }
2191                                 }
2192                                 break;
2193                         case ISDN_STAT_DHUP:
2194 #ifdef ISDN_TTY_STAT_DEBUG
2195                                 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2196 #endif
2197                                 if (TTY_IS_ACTIVE(info)) {
2198                                         if (info->dialing == 1)
2199                                                 isdn_tty_modem_result(RESULT_BUSY, info);
2200                                         if (info->dialing > 1)
2201                                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2202                                         info->dialing = 0;
2203 #ifdef ISDN_DEBUG_MODEM_HUP
2204                                         printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2205 #endif
2206                                         isdn_tty_modem_hup(info, 0);
2207                                         return 1;
2208                                 }
2209                                 break;
2210                         case ISDN_STAT_BCONN:
2211 #ifdef ISDN_TTY_STAT_DEBUG
2212                                 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2213 #endif
2214                                 /* Wake up any processes waiting
2215                                  * for incoming call of this device when
2216                                  * DCD follow the state of incoming carrier
2217                                  */
2218                                 if (info->blocked_open &&
2219                                    (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2220                                         wake_up_interruptible(&info->open_wait);
2221                                 }
2222
2223                                 /* Schedule CONNECT-Message to any tty
2224                                  * waiting for it and
2225                                  * set DCD-bit of its modem-status.
2226                                  */
2227                                 if (TTY_IS_ACTIVE(info) ||
2228                                     (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2229                                         info->msr |= UART_MSR_DCD;
2230                                         info->emu.charge = 0;
2231                                         if (info->dialing & 0xf)
2232                                                 info->last_dir = 1;
2233                                         else
2234                                                 info->last_dir = 0;
2235                                         info->dialing = 0;
2236                                         info->rcvsched = 1;
2237                                         if (USG_MODEM(dev->usage[i])) {
2238                                                 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2239                                                         strcpy(info->emu.connmsg, c->parm.num);
2240                                                         isdn_tty_modem_result(RESULT_CONNECT, info);
2241                                                 } else
2242                                                         isdn_tty_modem_result(RESULT_CONNECT64000, info);
2243                                         }
2244                                         if (USG_VOICE(dev->usage[i]))
2245                                                 isdn_tty_modem_result(RESULT_VCON, info);
2246                                         return 1;
2247                                 }
2248                                 break;
2249                         case ISDN_STAT_BHUP:
2250 #ifdef ISDN_TTY_STAT_DEBUG
2251                                 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2252 #endif
2253                                 if (TTY_IS_ACTIVE(info)) {
2254 #ifdef ISDN_DEBUG_MODEM_HUP
2255                                         printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2256 #endif
2257                                         isdn_tty_modem_hup(info, 0);
2258                                         return 1;
2259                                 }
2260                                 break;
2261                         case ISDN_STAT_NODCH:
2262 #ifdef ISDN_TTY_STAT_DEBUG
2263                                 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2264 #endif
2265                                 if (TTY_IS_ACTIVE(info)) {
2266                                         if (info->dialing) {
2267                                                 info->dialing = 0;
2268                                                 info->last_l2 = -1;
2269                                                 info->last_si = 0;
2270                                                 sprintf(info->last_cause, "0000");
2271                                                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2272                                         }
2273                                         isdn_tty_modem_hup(info, 0);
2274                                         return 1;
2275                                 }
2276                                 break;
2277                         case ISDN_STAT_UNLOAD:
2278 #ifdef ISDN_TTY_STAT_DEBUG
2279                                 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2280 #endif
2281                                 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2282                                         info = &dev->mdm.info[i];
2283                                         if (info->isdn_driver == c->driver) {
2284                                                 if (info->online)
2285                                                         isdn_tty_modem_hup(info, 1);
2286                                         }
2287                                 }
2288                                 return 1;
2289 #ifdef CONFIG_ISDN_TTY_FAX
2290                         case ISDN_STAT_FAXIND:
2291                                 if (TTY_IS_ACTIVE(info)) {
2292                                         isdn_tty_fax_command(info, c);
2293                                 }
2294                                 break;
2295 #endif
2296 #ifdef CONFIG_ISDN_AUDIO
2297                         case ISDN_STAT_AUDIO:
2298                                 if (TTY_IS_ACTIVE(info)) {
2299                                         switch(c->parm.num[0]) {
2300                                                 case ISDN_AUDIO_DTMF:
2301                                                         if (info->vonline) {
2302                                                                 isdn_audio_put_dle_code(info,
2303                                                                         c->parm.num[1]);
2304                                                         }
2305                                                         break;
2306                                         }
2307                                 }
2308                                 break;
2309 #endif
2310                 }
2311         }
2312         return 0;
2313 }
2314
2315 /*********************************************************************
2316  Modem-Emulator-Routines
2317  *********************************************************************/
2318
2319 #define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2320
2321 /*
2322  * Put a message from the AT-emulator into receive-buffer of tty,
2323  * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2324  */
2325 void
2326 isdn_tty_at_cout(char *msg, modem_info * info)
2327 {
2328         struct tty_struct *tty;
2329         atemu *m = &info->emu;
2330         char *p;
2331         char c;
2332         u_long flags;
2333         struct sk_buff *skb = NULL;
2334         char *sp = NULL;
2335         int l;
2336
2337         if (!msg) {
2338                 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2339                 return;
2340         }
2341
2342         l = strlen(msg);
2343
2344         spin_lock_irqsave(&info->readlock, flags);
2345         tty = info->tty;
2346         if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2347                 spin_unlock_irqrestore(&info->readlock, flags);
2348                 return;
2349         }
2350
2351         /* use queue instead of direct, if online and */
2352         /* data is in queue or buffer is full */
2353         if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2354             !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2355                 skb = alloc_skb(l, GFP_ATOMIC);
2356                 if (!skb) {
2357                         spin_unlock_irqrestore(&info->readlock, flags);
2358                         return;
2359                 }
2360                 sp = skb_put(skb, l);
2361 #ifdef CONFIG_ISDN_AUDIO
2362                 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2363                 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2364 #endif
2365         }
2366
2367         for (p = msg; *p; p++) {
2368                 switch (*p) {
2369                         case '\r':
2370                                 c = m->mdmreg[REG_CR];
2371                                 break;
2372                         case '\n':
2373                                 c = m->mdmreg[REG_LF];
2374                                 break;
2375                         case '\b':
2376                                 c = m->mdmreg[REG_BS];
2377                                 break;
2378                         default:
2379                                 c = *p;
2380                 }
2381                 if (skb) {
2382                         *sp++ = c;
2383                 } else {
2384                         if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
2385                                 break;
2386                 }
2387         }
2388         if (skb) {
2389                 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2390                 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2391                 spin_unlock_irqrestore(&info->readlock, flags);
2392                 /* Schedule dequeuing */
2393                 if (dev->modempoll && info->rcvsched)
2394                         isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2395
2396         } else {
2397                 spin_unlock_irqrestore(&info->readlock, flags);
2398                 tty_flip_buffer_push(tty);
2399         }
2400 }
2401
2402 /*
2403  * Perform ATH Hangup
2404  */
2405 static void
2406 isdn_tty_on_hook(modem_info * info)
2407 {
2408         if (info->isdn_channel >= 0) {
2409 #ifdef ISDN_DEBUG_MODEM_HUP
2410                 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2411 #endif
2412                 isdn_tty_modem_hup(info, 1);
2413         }
2414 }
2415
2416 static void
2417 isdn_tty_off_hook(void)
2418 {
2419         printk(KERN_DEBUG "isdn_tty_off_hook\n");
2420 }
2421
2422 #define PLUSWAIT1 (HZ/2)        /* 0.5 sec. */
2423 #define PLUSWAIT2 (HZ*3/2)      /* 1.5 sec */
2424
2425 /*
2426  * Check Buffer for Modem-escape-sequence, activate timer-callback to
2427  * isdn_tty_modem_escape() if sequence found.
2428  *
2429  * Parameters:
2430  *   p          pointer to databuffer
2431  *   plus       escape-character
2432  *   count      length of buffer
2433  *   pluscount  count of valid escape-characters so far
2434  *   lastplus   timestamp of last character
2435  */
2436 static void
2437 isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2438                    u_long *lastplus)
2439 {
2440         if (plus > 127)
2441                 return;
2442         if (count > 3) {
2443                 p += count - 3;
2444                 count = 3;
2445                 *pluscount = 0;
2446         }
2447         while (count > 0) {
2448                 if (*(p++) == plus) {
2449                         if ((*pluscount)++) {
2450                                 /* Time since last '+' > 0.5 sec. ? */
2451                                 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2452                                         *pluscount = 1;
2453                         } else {
2454                                 /* Time since last non-'+' < 1.5 sec. ? */
2455                                 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2456                                         *pluscount = 0;
2457                         }
2458                         if ((*pluscount == 3) && (count == 1))
2459                                 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2460                         if (*pluscount > 3)
2461                                 *pluscount = 1;
2462                 } else
2463                         *pluscount = 0;
2464                 *lastplus = jiffies;
2465                 count--;
2466         }
2467 }
2468
2469 /*
2470  * Return result of AT-emulator to tty-receive-buffer, depending on
2471  * modem-register 12, bit 0 and 1.
2472  * For CONNECT-messages also switch to online-mode.
2473  * For RING-message handle auto-ATA if register 0 != 0
2474  */
2475
2476 static void
2477 isdn_tty_modem_result(int code, modem_info * info)
2478 {
2479         atemu *m = &info->emu;
2480         static char *msg[] =
2481         {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2482          "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2483          "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2484         char s[ISDN_MSNLEN+10];
2485
2486         switch (code) {
2487                 case RESULT_RING:
2488                         m->mdmreg[REG_RINGCNT]++;
2489                         if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2490                                 /* Automatically accept incoming call */
2491                                 isdn_tty_cmd_ATA(info);
2492                         break;
2493                 case RESULT_NO_CARRIER:
2494 #ifdef ISDN_DEBUG_MODEM_HUP
2495                         printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2496                                (info->flags & ISDN_ASYNC_CLOSING),
2497                                (!info->tty));
2498 #endif
2499                         m->mdmreg[REG_RINGCNT] = 0;
2500                         del_timer(&info->nc_timer);
2501                         info->ncarrier = 0;
2502                         if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2503                                 return;
2504                         }
2505 #ifdef CONFIG_ISDN_AUDIO
2506                         if (info->vonline & 1) {
2507 #ifdef ISDN_DEBUG_MODEM_VOICE
2508                                 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2509                                        info->line);
2510 #endif
2511                                 /* voice-recording, add DLE-ETX */
2512                                 isdn_tty_at_cout("\020\003", info);
2513                         }
2514                         if (info->vonline & 2) {
2515 #ifdef ISDN_DEBUG_MODEM_VOICE
2516                                 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2517                                        info->line);
2518 #endif
2519                                 /* voice-playing, add DLE-DC4 */
2520                                 isdn_tty_at_cout("\020\024", info);
2521                         }
2522 #endif
2523                         break;
2524                 case RESULT_CONNECT:
2525                 case RESULT_CONNECT64000:
2526                         sprintf(info->last_cause, "0000");
2527                         if (!info->online)
2528                                 info->online = 2;
2529                         break;
2530                 case RESULT_VCON:
2531 #ifdef ISDN_DEBUG_MODEM_VOICE
2532                         printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2533                                info->line);
2534 #endif
2535                         sprintf(info->last_cause, "0000");
2536                         if (!info->online)
2537                                 info->online = 1;
2538                         break;
2539         } /* switch(code) */
2540
2541         if (m->mdmreg[REG_RESP] & BIT_RESP) {
2542                 /* Show results */
2543                 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2544                         /* Show numeric results only */
2545                         sprintf(s, "\r\n%d\r\n", code);
2546                         isdn_tty_at_cout(s, info);
2547                 } else {
2548                         if (code == RESULT_RING) {
2549                             /* return if "show RUNG" and ringcounter>1 */
2550                             if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2551                                     (m->mdmreg[REG_RINGCNT] > 1))
2552                                                 return;
2553                             /* print CID, _before_ _every_ ring */
2554                             if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2555                                     isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2556                                     isdn_tty_at_cout(dev->num[info->drv_index], info);
2557                                     if (m->mdmreg[REG_CDN] & BIT_CDN) {
2558                                             isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2559                                             isdn_tty_at_cout(info->emu.cpn, info);
2560                                     }
2561                             }
2562                         }
2563                         isdn_tty_at_cout("\r\n", info);
2564                         isdn_tty_at_cout(msg[code], info);
2565                         switch (code) {
2566                                 case RESULT_CONNECT:
2567                                         switch (m->mdmreg[REG_L2PROT]) {
2568                                                 case ISDN_PROTO_L2_MODEM:
2569                                                         isdn_tty_at_cout(" ", info);
2570                                                         isdn_tty_at_cout(m->connmsg, info);
2571                                                         break;
2572                                         }
2573                                         break;
2574                                 case RESULT_RING:
2575                                         /* Append CPN, if enabled */
2576                                         if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2577                                                 sprintf(s, "/%s", m->cpn);
2578                                                 isdn_tty_at_cout(s, info);
2579                                         }
2580                                         /* Print CID only once, _after_ 1st RING */
2581                                         if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2582                                             (m->mdmreg[REG_RINGCNT] == 1)) {
2583                                                 isdn_tty_at_cout("\r\n", info);
2584                                                 isdn_tty_at_cout("CALLER NUMBER: ", info);
2585                                                 isdn_tty_at_cout(dev->num[info->drv_index], info);
2586                                                 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2587                                                         isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2588                                                         isdn_tty_at_cout(info->emu.cpn, info);
2589                                                 }
2590                                         }
2591                                         break;
2592                                 case RESULT_NO_CARRIER:
2593                                 case RESULT_NO_DIALTONE:
2594                                 case RESULT_BUSY:
2595                                 case RESULT_NO_ANSWER:
2596                                         m->mdmreg[REG_RINGCNT] = 0;
2597                                         /* Append Cause-Message if enabled */
2598                                         if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2599                                                 sprintf(s, "/%s", info->last_cause);
2600                                                 isdn_tty_at_cout(s, info);
2601                                         }
2602                                         break;
2603                                 case RESULT_CONNECT64000:
2604                                         /* Append Protocol to CONNECT message */
2605                                         switch (m->mdmreg[REG_L2PROT]) {
2606                                                 case ISDN_PROTO_L2_X75I:
2607                                                 case ISDN_PROTO_L2_X75UI:
2608                                                 case ISDN_PROTO_L2_X75BUI:
2609                                                         isdn_tty_at_cout("/X.75", info);
2610                                                         break;
2611                                                 case ISDN_PROTO_L2_HDLC:
2612                                                         isdn_tty_at_cout("/HDLC", info);
2613                                                         break;
2614                                                 case ISDN_PROTO_L2_V11096:
2615                                                         isdn_tty_at_cout("/V110/9600", info);
2616                                                         break;
2617                                                 case ISDN_PROTO_L2_V11019:
2618                                                         isdn_tty_at_cout("/V110/19200", info);
2619                                                         break;
2620                                                 case ISDN_PROTO_L2_V11038:
2621                                                         isdn_tty_at_cout("/V110/38400", info);
2622                                                         break;
2623                                         }
2624                                         if (m->mdmreg[REG_T70] & BIT_T70) {
2625                                                 isdn_tty_at_cout("/T.70", info);
2626                                                 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2627                                                         isdn_tty_at_cout("+", info);
2628                                         }
2629                                         break;
2630                         }
2631                         isdn_tty_at_cout("\r\n", info);
2632                 }
2633         }
2634         if (code == RESULT_NO_CARRIER) {
2635                 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2636                         return;
2637                 }
2638                 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2639                     (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2640                        (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2641                         tty_hangup(info->tty);
2642                 }
2643         }
2644 }
2645
2646
2647 /*
2648  * Display a modem-register-value.
2649  */
2650 static void
2651 isdn_tty_show_profile(int ridx, modem_info * info)
2652 {
2653         char v[6];
2654
2655         sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2656         isdn_tty_at_cout(v, info);
2657 }
2658
2659 /*
2660  * Get MSN-string from char-pointer, set pointer to end of number
2661  */
2662 static void
2663 isdn_tty_get_msnstr(char *n, char **p)
2664 {
2665         int limit = ISDN_MSNLEN - 1;
2666
2667         while (((*p[0] >= '0' && *p[0] <= '9') ||
2668                 /* Why a comma ??? */
2669                 (*p[0] == ',') || (*p[0] == ':')) &&
2670                 (limit--))
2671                 *n++ = *p[0]++;
2672         *n = '\0';
2673 }
2674
2675 /*
2676  * Get phone-number from modem-commandbuffer
2677  */
2678 static void
2679 isdn_tty_getdial(char *p, char *q,int cnt)
2680 {
2681         int first = 1;
2682         int limit = ISDN_MSNLEN - 1;    /* MUST match the size of interface var to avoid
2683                                         buffer overflow */
2684
2685         while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) {
2686                 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2687                     ((*p == 'R') && first) ||
2688                     (*p == '*') || (*p == '#')) {
2689                         *q++ = *p;
2690                         limit--;
2691                 }
2692                 if(!limit)
2693                         break;
2694                 p++;
2695                 first = 0;
2696         }
2697         *q = 0;
2698 }
2699
2700 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2701 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2702
2703 static void
2704 isdn_tty_report(modem_info * info)
2705 {
2706         atemu *m = &info->emu;
2707         char s[80];
2708
2709         isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2710         sprintf(s, "    Remote Number:    %s\r\n", info->last_num);
2711         isdn_tty_at_cout(s, info);
2712         sprintf(s, "    Direction:        %s\r\n", info->last_dir ? "outgoing" : "incoming");
2713         isdn_tty_at_cout(s, info);
2714         isdn_tty_at_cout("    Layer-2 Protocol: ", info);
2715         switch (info->last_l2) {
2716                 case ISDN_PROTO_L2_X75I:
2717                         isdn_tty_at_cout("X.75i", info);
2718                         break;
2719                 case ISDN_PROTO_L2_X75UI:
2720                         isdn_tty_at_cout("X.75ui", info);
2721                         break;
2722                 case ISDN_PROTO_L2_X75BUI:
2723                         isdn_tty_at_cout("X.75bui", info);
2724                         break;
2725                 case ISDN_PROTO_L2_HDLC:
2726                         isdn_tty_at_cout("HDLC", info);
2727                         break;
2728                 case ISDN_PROTO_L2_V11096:
2729                         isdn_tty_at_cout("V.110 9600 Baud", info);
2730                         break;
2731                 case ISDN_PROTO_L2_V11019:
2732                         isdn_tty_at_cout("V.110 19200 Baud", info);
2733                         break;
2734                 case ISDN_PROTO_L2_V11038:
2735                         isdn_tty_at_cout("V.110 38400 Baud", info);
2736                         break;
2737                 case ISDN_PROTO_L2_TRANS:
2738                         isdn_tty_at_cout("transparent", info);
2739                         break;
2740                 case ISDN_PROTO_L2_MODEM:
2741                         isdn_tty_at_cout("modem", info);
2742                         break;
2743                 case ISDN_PROTO_L2_FAX:
2744                         isdn_tty_at_cout("fax", info);
2745                         break;
2746                 default:
2747                         isdn_tty_at_cout("unknown", info);
2748                         break;
2749         }
2750         if (m->mdmreg[REG_T70] & BIT_T70) {
2751                 isdn_tty_at_cout("/T.70", info);
2752                 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2753                         isdn_tty_at_cout("+", info);
2754         }
2755         isdn_tty_at_cout("\r\n", info);
2756         isdn_tty_at_cout("    Service:          ", info);
2757         switch (info->last_si) {
2758                 case 1:
2759                         isdn_tty_at_cout("audio\r\n", info);
2760                         break;
2761                 case 5:
2762                         isdn_tty_at_cout("btx\r\n", info);
2763                         break;
2764                 case 7:
2765                         isdn_tty_at_cout("data\r\n", info);
2766                         break;
2767                 default:
2768                         sprintf(s, "%d\r\n", info->last_si);
2769                         isdn_tty_at_cout(s, info);
2770                         break;
2771         }
2772         sprintf(s, "    Hangup location:  %s\r\n", info->last_lhup ? "local" : "remote");
2773         isdn_tty_at_cout(s, info);
2774         sprintf(s, "    Last cause:       %s\r\n", info->last_cause);
2775         isdn_tty_at_cout(s, info);
2776 }
2777
2778 /*
2779  * Parse AT&.. commands.
2780  */
2781 static int
2782 isdn_tty_cmd_ATand(char **p, modem_info * info)
2783 {
2784         atemu *m = &info->emu;
2785         int i;
2786         char rb[100];
2787
2788 #define MAXRB (sizeof(rb) - 1)
2789
2790         switch (*p[0]) {
2791                 case 'B':
2792                         /* &B - Set Buffersize */
2793                         p[0]++;
2794                         i = isdn_getnum(p);
2795                         if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2796                                 PARSE_ERROR1;
2797 #ifdef CONFIG_ISDN_AUDIO
2798                         if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2799                                 PARSE_ERROR1;
2800 #endif
2801                         m->mdmreg[REG_PSIZE] = i / 16;
2802                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2803                         switch (m->mdmreg[REG_L2PROT]) {
2804                                 case ISDN_PROTO_L2_V11096:
2805                                 case ISDN_PROTO_L2_V11019:
2806                                 case ISDN_PROTO_L2_V11038:
2807                                         info->xmit_size /= 10;
2808                         }
2809                         break;
2810                 case 'C':
2811                         /* &C - DCD Status */
2812                         p[0]++;
2813                         switch (isdn_getnum(p)) {
2814                                 case 0:
2815                                         m->mdmreg[REG_DCD] &= ~BIT_DCD;
2816                                         break;
2817                                 case 1:
2818                                         m->mdmreg[REG_DCD] |= BIT_DCD;
2819                                         break;
2820                                 default:
2821                                         PARSE_ERROR1
2822                         }
2823                         break;
2824                 case 'D':
2825                         /* &D - Set DTR-Low-behavior */
2826                         p[0]++;
2827                         switch (isdn_getnum(p)) {
2828                                 case 0:
2829                                         m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2830                                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2831                                         break;
2832                                 case 2:
2833                                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2834                                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2835                                         break;
2836                                 case 3:
2837                                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2838                                         m->mdmreg[REG_DTRR] |= BIT_DTRR;
2839                                         break;
2840                                 default:
2841                                         PARSE_ERROR1
2842                         }
2843                         break;
2844                 case 'E':
2845                         /* &E -Set EAZ/MSN */
2846                         p[0]++;
2847                         isdn_tty_get_msnstr(m->msn, p);
2848                         break;
2849                 case 'F':
2850                         /* &F -Set Factory-Defaults */
2851                         p[0]++;
2852                         if (info->msr & UART_MSR_DCD)
2853                                 PARSE_ERROR1;
2854                         isdn_tty_reset_profile(m);
2855                         isdn_tty_modem_reset_regs(info, 1);
2856                         break;
2857 #ifdef DUMMY_HAYES_AT
2858                 case 'K':
2859                         /* only for be compilant with common scripts */
2860                         /* &K Flowcontrol - no function */
2861                         p[0]++;
2862                         isdn_getnum(p);
2863                         break;
2864 #endif
2865                 case 'L':
2866                         /* &L -Set Numbers to listen on */
2867                         p[0]++;
2868                         i = 0;
2869                         while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2870                                (i < ISDN_LMSNLEN - 1))
2871                                 m->lmsn[i++] = *p[0]++;
2872                         m->lmsn[i] = '\0';
2873                         break;
2874                 case 'R':
2875                         /* &R - Set V.110 bitrate adaption */
2876                         p[0]++;
2877                         i = isdn_getnum(p);
2878                         switch (i) {
2879                                 case 0:
2880                                         /* Switch off V.110, back to X.75 */
2881                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2882                                         m->mdmreg[REG_SI2] = 0;
2883                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2884                                         break;
2885                                 case 9600:
2886                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2887                                         m->mdmreg[REG_SI2] = 197;
2888                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2889                                         break;
2890                                 case 19200:
2891                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2892                                         m->mdmreg[REG_SI2] = 199;
2893                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2894                                         break;
2895                                 case 38400:
2896                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2897                                         m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2898                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2899                                         break;
2900                                 default:
2901                                         PARSE_ERROR1;
2902                         }
2903                         /* Switch off T.70 */
2904                         m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2905                         /* Set Service 7 */
2906                         m->mdmreg[REG_SI1] |= 4;
2907                         break;
2908                 case 'S':
2909                         /* &S - Set Windowsize */
2910                         p[0]++;
2911                         i = isdn_getnum(p);
2912                         if ((i > 0) && (i < 9))
2913                                 m->mdmreg[REG_WSIZE] = i;
2914                         else
2915                                 PARSE_ERROR1;
2916                         break;
2917                 case 'V':
2918                         /* &V - Show registers */
2919                         p[0]++;
2920                         isdn_tty_at_cout("\r\n", info);
2921                         for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2922                                 sprintf(rb, "S%02d=%03d%s", i,
2923                                         m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2924                                 isdn_tty_at_cout(rb, info);
2925                         }
2926                         sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2927                                 strlen(m->msn) ? m->msn : "None");
2928                         isdn_tty_at_cout(rb, info);
2929                         if (strlen(m->lmsn)) {
2930                                 isdn_tty_at_cout("\r\nListen: ", info);
2931                                 isdn_tty_at_cout(m->lmsn, info);
2932                                 isdn_tty_at_cout("\r\n", info);
2933                         }
2934                         break;
2935                 case 'W':
2936                         /* &W - Write Profile */
2937                         p[0]++;
2938                         switch (*p[0]) {
2939                                 case '0':
2940                                         p[0]++;
2941                                         modem_write_profile(m);
2942                                         break;
2943                                 default:
2944                                         PARSE_ERROR1;
2945                         }
2946                         break;
2947                 case 'X':
2948                         /* &X - Switch to BTX-Mode and T.70 */
2949                         p[0]++;
2950                         switch (isdn_getnum(p)) {
2951                                 case 0:
2952                                         m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2953                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2954                                         break;
2955                                 case 1:
2956                                         m->mdmreg[REG_T70] |= BIT_T70;
2957                                         m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2958                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2959                                         info->xmit_size = 112;
2960                                         m->mdmreg[REG_SI1] = 4;
2961                                         m->mdmreg[REG_SI2] = 0;
2962                                         break;
2963                                 case 2:
2964                                         m->mdmreg[REG_T70] |= (BIT_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                                 default:
2971                                         PARSE_ERROR1;
2972                         }
2973                         break;
2974                 default:
2975                         PARSE_ERROR1;
2976         }
2977         return 0;
2978 }
2979
2980 static int
2981 isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
2982 {
2983         /* Some plausibility checks */
2984         switch (mreg) {
2985                 case REG_L2PROT:
2986                         if (mval > ISDN_PROTO_L2_MAX)
2987                                 return 1;
2988                         break;
2989                 case REG_PSIZE:
2990                         if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2991                                 return 1;
2992 #ifdef CONFIG_ISDN_AUDIO
2993                         if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
2994                                 return 1;
2995 #endif
2996                         info->xmit_size = mval * 16;
2997                         switch (m->mdmreg[REG_L2PROT]) {
2998                                 case ISDN_PROTO_L2_V11096:
2999                                 case ISDN_PROTO_L2_V11019:
3000                                 case ISDN_PROTO_L2_V11038:
3001                                         info->xmit_size /= 10;
3002                         }
3003                         break;
3004                 case REG_SI1I:
3005                 case REG_PLAN:
3006                 case REG_SCREEN:
3007                         /* readonly registers */
3008                         return 1;
3009         }
3010         return 0;
3011 }
3012
3013 /*
3014  * Perform ATS command
3015  */
3016 static int
3017 isdn_tty_cmd_ATS(char **p, modem_info * info)
3018 {
3019         atemu *m = &info->emu;
3020         int bitpos;
3021         int mreg;
3022         int mval;
3023         int bval;
3024
3025         mreg = isdn_getnum(p);
3026         if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3027                 PARSE_ERROR1;
3028         switch (*p[0]) {
3029                 case '=':
3030                         p[0]++;
3031                         mval = isdn_getnum(p);
3032                         if (mval < 0 || mval > 255)
3033                                 PARSE_ERROR1;
3034                         if (isdn_tty_check_ats(mreg, mval, info, m))
3035                                 PARSE_ERROR1;
3036                         m->mdmreg[mreg] = mval;
3037                         break;
3038                 case '.':
3039                         /* Set/Clear a single bit */
3040                         p[0]++;
3041                         bitpos = isdn_getnum(p);
3042                         if ((bitpos < 0) || (bitpos > 7))
3043                                 PARSE_ERROR1;
3044                         switch (*p[0]) {
3045                                 case '=':
3046                                         p[0]++;
3047                                         bval = isdn_getnum(p);
3048                                         if (bval < 0 || bval > 1)
3049                                                 PARSE_ERROR1;
3050                                         if (bval)
3051                                                 mval = m->mdmreg[mreg] | (1 << bitpos);
3052                                         else
3053                                                 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3054                                         if (isdn_tty_check_ats(mreg, mval, info, m))
3055                                                 PARSE_ERROR1;
3056                                         m->mdmreg[mreg] = mval;
3057                                         break;
3058                                 case '?':
3059                                         p[0]++;
3060                                         isdn_tty_at_cout("\r\n", info);
3061                                         isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3062                                                          info);
3063                                         break;
3064                                 default:
3065                                         PARSE_ERROR1;
3066                         }
3067                         break;
3068                 case '?':
3069                         p[0]++;
3070                         isdn_tty_show_profile(mreg, info);
3071                         break;
3072                 default:
3073                         PARSE_ERROR1;
3074                         break;
3075         }
3076         return 0;
3077 }
3078
3079 /*
3080  * Perform ATA command
3081  */
3082 static void
3083 isdn_tty_cmd_ATA(modem_info * info)
3084 {
3085         atemu *m = &info->emu;
3086         isdn_ctrl cmd;
3087         int l2;
3088
3089         if (info->msr & UART_MSR_RI) {
3090                 /* Accept incoming call */
3091                 info->last_dir = 0;
3092                 strcpy(info->last_num, dev->num[info->drv_index]);
3093                 m->mdmreg[REG_RINGCNT] = 0;
3094                 info->msr &= ~UART_MSR_RI;
3095                 l2 = m->mdmreg[REG_L2PROT];
3096 #ifdef CONFIG_ISDN_AUDIO
3097                 /* If more than one bit set in reg18, autoselect Layer2 */
3098                 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3099                         if (m->mdmreg[REG_SI1I] == 1) {
3100                                 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3101                                         l2 = ISDN_PROTO_L2_TRANS;
3102                         } else
3103                                 l2 = ISDN_PROTO_L2_X75I;
3104                 }
3105 #endif
3106                 cmd.driver = info->isdn_driver;
3107                 cmd.command = ISDN_CMD_SETL2;
3108                 cmd.arg = info->isdn_channel + (l2 << 8);
3109                 info->last_l2 = l2;
3110                 isdn_command(&cmd);
3111                 cmd.driver = info->isdn_driver;
3112                 cmd.command = ISDN_CMD_SETL3;
3113                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3114 #ifdef CONFIG_ISDN_TTY_FAX
3115                 if (l2 == ISDN_PROTO_L2_FAX) {
3116                         cmd.parm.fax = info->fax;
3117                         info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3118                 }
3119 #endif
3120                 isdn_command(&cmd);
3121                 cmd.driver = info->isdn_driver;
3122                 cmd.arg = info->isdn_channel;
3123                 cmd.command = ISDN_CMD_ACCEPTD;
3124                 info->dialing = 16;
3125                 info->emu.carrierwait = 0;
3126                 isdn_command(&cmd);
3127                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3128         } else
3129                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3130 }
3131
3132 #ifdef CONFIG_ISDN_AUDIO
3133 /*
3134  * Parse AT+F.. commands
3135  */
3136 static int
3137 isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3138 {
3139         atemu *m = &info->emu;
3140         char rs[20];
3141
3142         if (!strncmp(p[0], "CLASS", 5)) {
3143                 p[0] += 5;
3144                 switch (*p[0]) {
3145                         case '?':
3146                                 p[0]++;
3147                                 sprintf(rs, "\r\n%d",
3148                                         (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3149 #ifdef CONFIG_ISDN_TTY_FAX
3150                                 if (TTY_IS_FCLASS2(info))
3151                                                 sprintf(rs, "\r\n2");
3152                                 else if (TTY_IS_FCLASS1(info))
3153                                                 sprintf(rs, "\r\n1");
3154 #endif
3155                                 isdn_tty_at_cout(rs, info);
3156                                 break;
3157                         case '=':
3158                                 p[0]++;
3159                                 switch (*p[0]) {
3160                                         case '0':
3161                                                 p[0]++;
3162                                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3163                                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3164                                                 m->mdmreg[REG_SI1] = 4;
3165                                                 info->xmit_size =
3166                                                     m->mdmreg[REG_PSIZE] * 16;
3167                                                 break;
3168 #ifdef CONFIG_ISDN_TTY_FAX
3169                                         case '1':
3170                                                 p[0]++;
3171                                                 if (!(dev->global_features &
3172                                                         ISDN_FEATURE_L3_FCLASS1))
3173                                                         PARSE_ERROR1;
3174                                                 m->mdmreg[REG_SI1] = 1;
3175                                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3176                                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3177                                                 info->xmit_size =
3178                                                     m->mdmreg[REG_PSIZE] * 16;
3179                                                 break;
3180                                         case '2':
3181                                                 p[0]++;
3182                                                 if (!(dev->global_features &
3183                                                         ISDN_FEATURE_L3_FCLASS2))
3184                                                         PARSE_ERROR1;
3185                                                 m->mdmreg[REG_SI1] = 1;
3186                                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3187                                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3188                                                 info->xmit_size =
3189                                                     m->mdmreg[REG_PSIZE] * 16;
3190                                                 break;
3191 #endif
3192                                         case '8':
3193                                                 p[0]++;
3194                                                 /* L2 will change on dialout with si=1 */
3195                                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3196                                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3197                                                 m->mdmreg[REG_SI1] = 5;
3198                                                 info->xmit_size = VBUF;
3199                                                 break;
3200                                         case '?':
3201                                                 p[0]++;
3202                                                 strcpy(rs, "\r\n0,");
3203 #ifdef CONFIG_ISDN_TTY_FAX
3204                                                 if (dev->global_features &
3205                                                         ISDN_FEATURE_L3_FCLASS1)
3206                                                         strcat(rs, "1,");
3207                                                 if (dev->global_features &
3208                                                         ISDN_FEATURE_L3_FCLASS2)
3209                                                         strcat(rs, "2,");
3210 #endif
3211                                                 strcat(rs, "8");
3212                                                 isdn_tty_at_cout(rs, info);
3213                                                 break;
3214                                         default:
3215                                                 PARSE_ERROR1;
3216                                 }
3217                                 break;
3218                         default:
3219                                 PARSE_ERROR1;
3220                 }
3221                 return 0;
3222         }
3223 #ifdef CONFIG_ISDN_TTY_FAX
3224         return (isdn_tty_cmd_PLUSF_FAX(p, info));
3225 #else
3226         PARSE_ERROR1;
3227 #endif
3228 }
3229
3230 /*
3231  * Parse AT+V.. commands
3232  */
3233 static int
3234 isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3235 {
3236         atemu *m = &info->emu;
3237         isdn_ctrl cmd;
3238         static char *vcmd[] =
3239         {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3240         int i;
3241         int par1;
3242         int par2;
3243         char rs[20];
3244
3245         i = 0;
3246         while (vcmd[i]) {
3247                 if (!strncmp(vcmd[i], p[0], 2)) {
3248                         p[0] += 2;
3249                         break;
3250                 }
3251                 i++;
3252         }
3253         switch (i) {
3254                 case 0:
3255                         /* AT+VNH - Auto hangup feature */
3256                         switch (*p[0]) {
3257                                 case '?':
3258                                         p[0]++;
3259                                         isdn_tty_at_cout("\r\n1", info);
3260                                         break;
3261                                 case '=':
3262                                         p[0]++;
3263                                         switch (*p[0]) {
3264                                                 case '1':
3265                                                         p[0]++;
3266                                                         break;
3267                                                 case '?':
3268                                                         p[0]++;
3269                                                         isdn_tty_at_cout("\r\n1", info);
3270                                                         break;
3271                                                 default:
3272                                                         PARSE_ERROR1;
3273                                         }
3274                                         break;
3275                                 default:
3276                                         PARSE_ERROR1;
3277                         }
3278                         break;
3279                 case 1:
3280                         /* AT+VIP - Reset all voice parameters */
3281                         isdn_tty_modem_reset_vpar(m);
3282                         break;
3283                 case 2:
3284                         /* AT+VLS - Select device, accept incoming call */
3285                         switch (*p[0]) {
3286                                 case '?':
3287                                         p[0]++;
3288                                         sprintf(rs, "\r\n%d", m->vpar[0]);
3289                                         isdn_tty_at_cout(rs, info);
3290                                         break;
3291                                 case '=':
3292                                         p[0]++;
3293                                         switch (*p[0]) {
3294                                                 case '0':
3295                                                         p[0]++;
3296                                                         m->vpar[0] = 0;
3297                                                         break;
3298                                                 case '2':
3299                                                         p[0]++;
3300                                                         m->vpar[0] = 2;
3301                                                         break;
3302                                                 case '?':
3303                                                         p[0]++;
3304                                                         isdn_tty_at_cout("\r\n0,2", info);
3305                                                         break;
3306                                                 default:
3307                                                         PARSE_ERROR1;
3308                                         }
3309                                         break;
3310                                 default:
3311                                         PARSE_ERROR1;
3312                         }
3313                         break;
3314                 case 3:
3315                         /* AT+VRX - Start recording */
3316                         if (!m->vpar[0])
3317                                 PARSE_ERROR1;
3318                         if (info->online != 1) {
3319                                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3320                                 return 1;
3321                         }
3322                         info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3323                         if (!info->dtmf_state) {
3324                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3325                                 PARSE_ERROR1;
3326                         }
3327                         info->silence_state = isdn_audio_silence_init(info->silence_state);
3328                         if (!info->silence_state) {
3329                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3330                                 PARSE_ERROR1;
3331                         }
3332                         if (m->vpar[3] < 5) {
3333                                 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3334                                 if (!info->adpcmr) {
3335                                         printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3336                                         PARSE_ERROR1;
3337                                 }
3338                         }
3339 #ifdef ISDN_DEBUG_AT
3340                         printk(KERN_DEBUG "AT: +VRX\n");
3341 #endif
3342                         info->vonline |= 1;
3343                         isdn_tty_modem_result(RESULT_CONNECT, info);
3344                         return 0;
3345                         break;
3346                 case 4:
3347                         /* AT+VSD - Silence detection */
3348                         switch (*p[0]) {
3349                                 case '?':
3350                                         p[0]++;
3351                                         sprintf(rs, "\r\n<%d>,<%d>",
3352                                                 m->vpar[1],
3353                                                 m->vpar[2]);
3354                                         isdn_tty_at_cout(rs, info);
3355                                         break;
3356                                 case '=':
3357                                         p[0]++;
3358                                         if ((*p[0]>='0') && (*p[0]<='9')) {
3359                                                 par1 = isdn_getnum(p);
3360                                                 if ((par1 < 0) || (par1 > 31))
3361                                                         PARSE_ERROR1;
3362                                                 if (*p[0] != ',')
3363                                                         PARSE_ERROR1;
3364                                                 p[0]++;
3365                                                 par2 = isdn_getnum(p);
3366                                                 if ((par2 < 0) || (par2 > 255))
3367                                                         PARSE_ERROR1;
3368                                                 m->vpar[1] = par1;
3369                                                 m->vpar[2] = par2;
3370                                                 break;
3371                                         } else
3372                                         if (*p[0] == '?') {
3373                                                 p[0]++;
3374                                                 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3375                                                            info);
3376                                                 break;
3377                                         } else
3378                                         PARSE_ERROR1;
3379                                         break;
3380                                 default:
3381                                         PARSE_ERROR1;
3382                         }
3383                         break;
3384                 case 5:
3385                         /* AT+VSM - Select compression */
3386                         switch (*p[0]) {
3387                                 case '?':
3388                                         p[0]++;
3389                                         sprintf(rs, "\r\n<%d>,<%d><8000>",
3390                                                 m->vpar[3],
3391                                                 m->vpar[1]);
3392                                         isdn_tty_at_cout(rs, info);
3393                                         break;
3394                                 case '=':
3395                                         p[0]++;
3396                                         switch (*p[0]) {
3397                                                 case '2':
3398                                                 case '3':
3399                                                 case '4':
3400                                                 case '5':
3401                                                 case '6':
3402                                                         par1 = isdn_getnum(p);
3403                                                         if ((par1 < 2) || (par1 > 6))
3404                                                                 PARSE_ERROR1;
3405                                                         m->vpar[3] = par1;
3406                                                         break;
3407                                                 case '?':
3408                                                         p[0]++;
3409                                                         isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3410                                                                    info);
3411                                                         isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3412                                                                    info);
3413                                                         isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3414                                                                    info);
3415                                                         isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3416                                                                    info);
3417                                                         isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3418                                                                    info);
3419                                                         break;
3420                                                 default:
3421                                                         PARSE_ERROR1;
3422                                         }
3423                                         break;
3424                                 default:
3425                                         PARSE_ERROR1;
3426                         }
3427                         break;
3428                 case 6:
3429                         /* AT+VTX - Start sending */
3430                         if (!m->vpar[0])
3431                                 PARSE_ERROR1;
3432                         if (info->online != 1) {
3433                                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3434                                 return 1;
3435                         }
3436                         info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3437                         if (!info->dtmf_state) {
3438                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3439                                 PARSE_ERROR1;
3440                         }
3441                         if (m->vpar[3] < 5) {
3442                                 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3443                                 if (!info->adpcms) {
3444                                         printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3445                                         PARSE_ERROR1;
3446                                 }
3447                         }
3448 #ifdef ISDN_DEBUG_AT
3449                         printk(KERN_DEBUG "AT: +VTX\n");
3450 #endif
3451                         m->lastDLE = 0;
3452                         info->vonline |= 2;
3453                         isdn_tty_modem_result(RESULT_CONNECT, info);
3454                         return 0;
3455                         break;
3456                 case 7:
3457                         /* AT+VDD - DTMF detection */
3458                         switch (*p[0]) {
3459                                 case '?':
3460                                         p[0]++;
3461                                         sprintf(rs, "\r\n<%d>,<%d>",
3462                                                 m->vpar[4],
3463                                                 m->vpar[5]);
3464                                         isdn_tty_at_cout(rs, info);
3465                                         break;
3466                                 case '=':
3467                                         p[0]++;
3468                                         if ((*p[0]>='0') && (*p[0]<='9')) {
3469                                                 if (info->online != 1)
3470                                                         PARSE_ERROR1;
3471                                                 par1 = isdn_getnum(p);
3472                                                 if ((par1 < 0) || (par1 > 15))
3473                                                         PARSE_ERROR1;
3474                                                 if (*p[0] != ',')
3475                                                         PARSE_ERROR1;
3476                                                 p[0]++;
3477                                                 par2 = isdn_getnum(p);
3478                                                 if ((par2 < 0) || (par2 > 255))
3479                                                         PARSE_ERROR1;
3480                                                 m->vpar[4] = par1;
3481                                                 m->vpar[5] = par2;
3482                                                 cmd.driver = info->isdn_driver;
3483                                                 cmd.command = ISDN_CMD_AUDIO;
3484                                                 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3485                                                 cmd.parm.num[0] = par1;
3486                                                 cmd.parm.num[1] = par2;
3487                                                 isdn_command(&cmd);
3488                                                 break;
3489                                         } else
3490                                         if (*p[0] == '?') {
3491                                                 p[0]++;
3492                                                 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3493                                                         info);
3494                                                 break;
3495                                         } else
3496                                         PARSE_ERROR1;
3497                                         break;
3498                                 default:
3499                                         PARSE_ERROR1;
3500                         }
3501                         break;
3502                 default:
3503                         PARSE_ERROR1;
3504         }
3505         return 0;
3506 }
3507 #endif                          /* CONFIG_ISDN_AUDIO */
3508
3509 /*
3510  * Parse and perform an AT-command-line.
3511  */
3512 static void
3513 isdn_tty_parse_at(modem_info * info)
3514 {
3515         atemu *m = &info->emu;
3516         char *p;
3517         char ds[ISDN_MSNLEN];
3518
3519 #ifdef ISDN_DEBUG_AT
3520         printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3521 #endif
3522         for (p = &m->mdmcmd[2]; *p;) {
3523                 switch (*p) {
3524                         case ' ':
3525                                 p++;
3526                                 break;
3527                         case 'A':
3528                                 /* A - Accept incoming call */
3529                                 p++;
3530                                 isdn_tty_cmd_ATA(info);
3531                                 return;
3532                                 break;
3533                         case 'D':
3534                                 /* D - Dial */
3535                                 if (info->msr & UART_MSR_DCD)
3536                                         PARSE_ERROR;
3537                                 if (info->msr & UART_MSR_RI) {
3538                                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3539                                         return;
3540                                 }
3541                                 isdn_tty_getdial(++p, ds, sizeof ds);
3542                                 p += strlen(p);
3543                                 if (!strlen(m->msn))
3544                                         isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3545                                 else if (strlen(ds))
3546                                         isdn_tty_dial(ds, info, m);
3547                                 else
3548                                         PARSE_ERROR;
3549                                 return;
3550                         case 'E':
3551                                 /* E - Turn Echo on/off */
3552                                 p++;
3553                                 switch (isdn_getnum(&p)) {
3554                                         case 0:
3555                                                 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3556                                                 break;
3557                                         case 1:
3558                                                 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3559                                                 break;
3560                                         default:
3561                                                 PARSE_ERROR;
3562                                 }
3563                                 break;
3564                         case 'H':
3565                                 /* H - On/Off-hook */
3566                                 p++;
3567                                 switch (*p) {
3568                                         case '0':
3569                                                 p++;
3570                                                 isdn_tty_on_hook(info);
3571                                                 break;
3572                                         case '1':
3573                                                 p++;
3574                                                 isdn_tty_off_hook();
3575                                                 break;
3576                                         default:
3577                                                 isdn_tty_on_hook(info);
3578                                                 break;
3579                                 }
3580                                 break;
3581                         case 'I':
3582                                 /* I - Information */
3583                                 p++;
3584                                 isdn_tty_at_cout("\r\nLinux ISDN", info);
3585                                 switch (*p) {
3586                                         case '0':
3587                                         case '1':
3588                                                 p++;
3589                                                 break;
3590                                         case '2':
3591                                                 p++;
3592                                                 isdn_tty_report(info);
3593                                                 break;
3594                                         case '3':
3595                                                 p++;
3596                                                 snprintf(ds, sizeof(ds), "\r\n%d", info->emu.charge);
3597                                                 isdn_tty_at_cout(ds, info);
3598                                                 break;
3599                                         default:;
3600                                 }
3601                                 break;
3602 #ifdef DUMMY_HAYES_AT
3603                         case 'L':
3604                         case 'M':
3605                                 /* only for be compilant with common scripts */
3606                                 /* no function */
3607                                 p++;
3608                                 isdn_getnum(&p);
3609                                 break;
3610 #endif
3611                         case 'O':
3612                                 /* O - Go online */
3613                                 p++;
3614                                 if (info->msr & UART_MSR_DCD)
3615                                         /* if B-Channel is up */
3616                                         isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3617                                 else
3618                                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3619                                 return;
3620                         case 'Q':
3621                                 /* Q - Turn Emulator messages on/off */
3622                                 p++;
3623                                 switch (isdn_getnum(&p)) {
3624                                         case 0:
3625                                                 m->mdmreg[REG_RESP] |= BIT_RESP;
3626                                                 break;
3627                                         case 1:
3628                                                 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3629                                                 break;
3630                                         default:
3631                                                 PARSE_ERROR;
3632                                 }
3633                                 break;
3634                         case 'S':
3635                                 /* S - Set/Get Register */
3636                                 p++;
3637                                 if (isdn_tty_cmd_ATS(&p, info))
3638                                         return;
3639                                 break;
3640                         case 'V':
3641                                 /* V - Numeric or ASCII Emulator-messages */
3642                                 p++;
3643                                 switch (isdn_getnum(&p)) {
3644                                         case 0:
3645                                                 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3646                                                 break;
3647                                         case 1:
3648                                                 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3649                                                 break;
3650                                         default:
3651                                                 PARSE_ERROR;
3652                                 }
3653                                 break;
3654                         case 'Z':
3655                                 /* Z - Load Registers from Profile */
3656                                 p++;
3657                                 if (info->msr & UART_MSR_DCD) {
3658                                         info->online = 0;
3659                                         isdn_tty_on_hook(info);
3660                                 }
3661                                 isdn_tty_modem_reset_regs(info, 1);
3662                                 break;
3663                         case '+':
3664                                 p++;
3665                                 switch (*p) {
3666 #ifdef CONFIG_ISDN_AUDIO
3667                                         case 'F':
3668                                                 p++;
3669                                                 if (isdn_tty_cmd_PLUSF(&p, info))
3670                                                         return;
3671                                                 break;
3672                                         case 'V':
3673                                                 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3674                                                         (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3675                                                         PARSE_ERROR;
3676                                                 p++;
3677                                                 if (isdn_tty_cmd_PLUSV(&p, info))
3678                                                         return;
3679                                                 break;
3680 #endif                          /* CONFIG_ISDN_AUDIO */
3681                                         case 'S':       /* SUSPEND */
3682                                                 p++;
3683                                                 isdn_tty_get_msnstr(ds, &p);
3684                                                 isdn_tty_suspend(ds, info, m);
3685                                                 break;
3686                                         case 'R':       /* RESUME */
3687                                                 p++;
3688                                                 isdn_tty_get_msnstr(ds, &p);
3689                                                 isdn_tty_resume(ds, info, m);
3690                                                 break;
3691                                         case 'M':       /* MESSAGE */
3692                                                 p++;
3693                                                 isdn_tty_send_msg(info, m, p);
3694                                                 break;
3695                                         default:
3696                                                 PARSE_ERROR;
3697                                 }
3698                                 break;
3699                         case '&':
3700                                 p++;
3701                                 if (isdn_tty_cmd_ATand(&p, info))
3702                                         return;
3703                                 break;
3704                         default:
3705                                 PARSE_ERROR;
3706                 }
3707         }
3708 #ifdef CONFIG_ISDN_AUDIO
3709         if (!info->vonline)
3710 #endif
3711                 isdn_tty_modem_result(RESULT_OK, info);
3712 }
3713
3714 /* Need own toupper() because standard-toupper is not available
3715  * within modules.
3716  */
3717 #define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3718
3719 /*
3720  * Perform line-editing of AT-commands
3721  *
3722  * Parameters:
3723  *   p        inputbuffer
3724  *   count    length of buffer
3725  *   channel  index to line (minor-device)
3726  */
3727 static int
3728 isdn_tty_edit_at(const char *p, int count, modem_info * info)
3729 {
3730         atemu *m = &info->emu;
3731         int total = 0;
3732         u_char c;
3733         char eb[2];
3734         int cnt;
3735
3736         for (cnt = count; cnt > 0; p++, cnt--) {
3737                 c = *p;
3738                 total++;
3739                 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3740                         /* Separator (CR or LF) */
3741                         m->mdmcmd[m->mdmcmdl] = 0;
3742                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3743                                 eb[0] = c;
3744                                 eb[1] = 0;
3745                                 isdn_tty_at_cout(eb, info);
3746                         }
3747                         if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3748                                 isdn_tty_parse_at(info);
3749                         m->mdmcmdl = 0;
3750                         continue;
3751                 }
3752                 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3753                         /* Backspace-Function */
3754                         if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3755                                 if (m->mdmcmdl)
3756                                         m->mdmcmdl--;
3757                                 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3758                                         isdn_tty_at_cout("\b", info);
3759                         }
3760                         continue;
3761                 }
3762                 if (cmdchar(c)) {
3763                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3764                                 eb[0] = c;
3765                                 eb[1] = 0;
3766                                 isdn_tty_at_cout(eb, info);
3767                         }
3768                         if (m->mdmcmdl < 255) {
3769                                 c = my_toupper(c);
3770                                 switch (m->mdmcmdl) {
3771                                         case 1:
3772                                                 if (c == 'T') {
3773                                                         m->mdmcmd[m->mdmcmdl] = c;
3774                                                         m->mdmcmd[++m->mdmcmdl] = 0;
3775                                                         break;
3776                                                 } else
3777                                                         m->mdmcmdl = 0;
3778                                                 /* Fall through, check for 'A' */
3779                                         case 0:
3780                                                 if (c == 'A') {
3781                                                         m->mdmcmd[m->mdmcmdl] = c;
3782                                                         m->mdmcmd[++m->mdmcmdl] = 0;
3783                                                 }
3784                                                 break;
3785                                         default:
3786                                                 m->mdmcmd[m->mdmcmdl] = c;
3787                                                 m->mdmcmd[++m->mdmcmdl] = 0;
3788                                 }
3789                         }
3790                 }
3791         }
3792         return total;
3793 }
3794
3795 /*
3796  * Switch all modem-channels who are online and got a valid
3797  * escape-sequence 1.5 seconds ago, to command-mode.
3798  * This function is called every second via timer-interrupt from within
3799  * timer-dispatcher isdn_timer_function()
3800  */
3801 void
3802 isdn_tty_modem_escape(void)
3803 {
3804         int ton = 0;
3805         int i;
3806         int midx;
3807
3808         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3809                 if (USG_MODEM(dev->usage[i]))
3810                         if ((midx = dev->m_idx[i]) >= 0) {
3811                                 modem_info *info = &dev->mdm.info[midx];
3812                                 if (info->online) {
3813                                         ton = 1;
3814                                         if ((info->emu.pluscount == 3) &&
3815                                             time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3816                                                 info->emu.pluscount = 0;
3817                                                 info->online = 0;
3818                                                 isdn_tty_modem_result(RESULT_OK, info);
3819                                         }
3820                                 }
3821                         }
3822         isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3823 }
3824
3825 /*
3826  * Put a RING-message to all modem-channels who have the RI-bit set.
3827  * This function is called every second via timer-interrupt from within
3828  * timer-dispatcher isdn_timer_function()
3829  */
3830 void
3831 isdn_tty_modem_ring(void)
3832 {
3833         int ton = 0;
3834         int i;
3835
3836         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3837                 modem_info *info = &dev->mdm.info[i];
3838                 if (info->msr & UART_MSR_RI) {
3839                         ton = 1;
3840                         isdn_tty_modem_result(RESULT_RING, info);
3841                 }
3842         }
3843         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3844 }
3845
3846 /*
3847  * For all online tty's, try sending data to
3848  * the lower levels.
3849  */
3850 void
3851 isdn_tty_modem_xmit(void)
3852 {
3853         int ton = 1;
3854         int i;
3855
3856         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3857                 modem_info *info = &dev->mdm.info[i];
3858                 if (info->online) {
3859                         ton = 1;
3860                         isdn_tty_senddown(info);
3861                         isdn_tty_tint(info);
3862                 }
3863         }
3864         isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3865 }
3866
3867 /*
3868  * Check all channels if we have a 'no carrier' timeout.
3869  * Timeout value is set by Register S7.
3870  */
3871 void
3872 isdn_tty_carrier_timeout(void)
3873 {
3874         int ton = 0;
3875         int i;
3876
3877         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3878                 modem_info *info = &dev->mdm.info[i];
3879                 if (info->dialing) {
3880                         if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3881                                 info->dialing = 0;
3882                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3883                                 isdn_tty_modem_hup(info, 1);
3884                         }
3885                         else
3886                                 ton = 1;
3887                 }
3888         }
3889         isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3890 }