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   1 /* $Id: isdn_tty.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
   2  *
   3  * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
   4  *
   5  * Copyright 1994-1999  by Fritz Elfert (fritz@isdn4linux.de)
   6  * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  */
  12 #undef ISDN_TTY_STAT_DEBUG
  13
  14 #include <linux/isdn.h>
  15 #include <linux/delay.h>
  16 #include "isdn_common.h"
  17 #include "isdn_tty.h"
  18 #ifdef CONFIG_ISDN_AUDIO
  19 #include "isdn_audio.h"
  20 #define VBUF 0x3e0
  21 #define VBUFX (VBUF/16)
  22 #endif
  23
  24 #define FIX_FILE_TRANSFER
  25 #define DUMMY_HAYES_AT
  26
  27 /* Prototypes */
  28
  29 static int isdn_tty_edit_at(const char *, int, modem_info *);
  30 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
  31 static void isdn_tty_modem_reset_regs(modem_info *, int);
  32 static void isdn_tty_cmd_ATA(modem_info *);
  33 static void isdn_tty_flush_buffer(struct tty_struct *);
  34 static void isdn_tty_modem_result(int, modem_info *);
  35 #ifdef CONFIG_ISDN_AUDIO
  36 static int isdn_tty_countDLE(unsigned char *, int);
  37 #endif
  38
  39 /* Leave this unchanged unless you know what you do! */
  40 #define MODEM_PARANOIA_CHECK
  41 #define MODEM_DO_RESTART
  42
  43 static int bit2si[8] =
  44 {1, 5, 7, 7, 7, 7, 7, 7};
  45 static int si2bit[8] =
  46 {4, 1, 4, 4, 4, 4, 4, 4};
  47
  48 char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
  49
  50
  51 /* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
  52  * to stuff incoming data directly into a tty's flip-buffer. This
  53  * is done to speed up tty-receiving if the receive-queue is empty.
  54  * This routine MUST be called with interrupts off.
  55  * Return:
  56  *  1 = Success
  57  *  0 = Failure, data has to be buffered and later processed by
  58  *      isdn_tty_readmodem().
  59  */
  60 static int
  61 isdn_tty_try_read(modem_info * info, struct sk_buff *skb)
  62 {
  63         int c;
  64         int len;
  65         struct tty_struct *tty;
  66         char last;
  67
  68         if (info->online) {
  69                 if ((tty = info->tty)) {
  70                         if (info->mcr & UART_MCR_RTS) {
  71                                 len = skb->len
  72 #ifdef CONFIG_ISDN_AUDIO
  73                                         + ISDN_AUDIO_SKB_DLECOUNT(skb)
  74 #endif
  75                                         ;
  76
  77                                 c = tty_buffer_request_room(tty, len);
  78                                 if (c >= len) {
  79 #ifdef CONFIG_ISDN_AUDIO
  80                                         if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
  81                                                 int l = skb->len;
  82                                                 unsigned char *dp = skb->data;
  83                                                 while (--l) {
  84                                                         if (*dp == DLE)
  85                                                                 tty_insert_flip_char(tty, DLE, 0);
  86                                                         tty_insert_flip_char(tty, *dp++, 0);
  87                                                 }
  88                                                 if (*dp == DLE)
  89                                                         tty_insert_flip_char(tty, DLE, 0);
  90                                                 last = *dp;
  91                                         } else {
  92 #endif
  93                                                 if(len > 1)
  94                                                         tty_insert_flip_string(tty, skb->data, len - 1);
  95                                                 last = skb->data[len - 1];
  96 #ifdef CONFIG_ISDN_AUDIO
  97                                         }
  98 #endif
  99                                         if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
 100                                                 tty_insert_flip_char(tty, last, 0xFF);
 101                                         else
 102                                                 tty_insert_flip_char(tty, last, TTY_NORMAL);
 103                                         tty_flip_buffer_push(tty);
 104                                         kfree_skb(skb);
 105                                         return 1;
 106                                 }
 107                         }
 108                 }
 109         }
 110         return 0;
 111 }
 112
 113 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
 114  * It tries getting received data from the receive queue an stuff it into
 115  * the tty's flip-buffer.
 116  */
 117 void
 118 isdn_tty_readmodem(void)
 119 {
 120         int resched = 0;
 121         int midx;
 122         int i;
 123         int r;
 124         struct tty_struct *tty;
 125         modem_info *info;
 126
 127         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
 128                 if ((midx = dev->m_idx[i]) >= 0) {
 129                         info = &dev->mdm.info[midx];
 130                         if (info->online) {
 131                                 r = 0;
 132 #ifdef CONFIG_ISDN_AUDIO
 133                                 isdn_audio_eval_dtmf(info);
 134                                 if ((info->vonline & 1) && (info->emu.vpar[1]))
 135                                         isdn_audio_eval_silence(info);
 136 #endif
 137                                 if ((tty = info->tty)) {
 138                                         if (info->mcr & UART_MCR_RTS) {
 139                                                 /* CISCO AsyncPPP Hack */
 140                                                 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
 141                                                         r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
 142                                                 else
 143                                                         r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
 144                                                 if (r)
 145                                                         tty_flip_buffer_push(tty);
 146                                         } else
 147                                                 r = 1;
 148                                 } else
 149                                         r = 1;
 150                                 if (r) {
 151                                         info->rcvsched = 0;
 152                                         resched = 1;
 153                                 } else
 154                                         info->rcvsched = 1;
 155                         }
 156                 }
 157         }
 158         if (!resched)
 159                 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
 160 }
 161
 162 int
 163 isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
 164 {
 165         ulong flags;
 166         int midx;
 167 #ifdef CONFIG_ISDN_AUDIO
 168         int ifmt;
 169 #endif
 170         modem_info *info;
 171
 172         if ((midx = dev->m_idx[i]) < 0) {
 173                 /* if midx is invalid, packet is not for tty */
 174                 return 0;
 175         }
 176         info = &dev->mdm.info[midx];
 177 #ifdef CONFIG_ISDN_AUDIO
 178         ifmt = 1;
 179
 180         if ((info->vonline) && (!info->emu.vpar[4]))
 181                 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
 182         if ((info->vonline & 1) && (info->emu.vpar[1]))
 183                 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
 184 #endif
 185         if ((info->online < 2)
 186 #ifdef CONFIG_ISDN_AUDIO
 187             && (!(info->vonline & 1))
 188 #endif
 189                 ) {
 190                 /* If Modem not listening, drop data */
 191                 kfree_skb(skb);
 192                 return 1;
 193         }
 194         if (info->emu.mdmreg[REG_T70] & BIT_T70) {
 195                 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
 196                         /* T.70 decoding: throw away the T.70 header (2 or 4 bytes)   */
 197                         if (skb->data[0] == 3) /* pure data packet -> 4 byte headers  */
 198                                 skb_pull(skb, 4);
 199                         else
 200                                 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr  */
 201                                         skb_pull(skb, 2);
 202                 } else
 203                         /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
 204                         if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
 205                                 skb_pull(skb, 4);
 206         }
 207 #ifdef CONFIG_ISDN_AUDIO
 208         ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
 209         ISDN_AUDIO_SKB_LOCK(skb) = 0;
 210         if (info->vonline & 1) {
 211                 /* voice conversion/compression */
 212                 switch (info->emu.vpar[3]) {
 213                         case 2:
 214                         case 3:
 215                         case 4:
 216                                 /* adpcm
 217                                  * Since compressed data takes less
 218                                  * space, we can overwrite the buffer.
 219                                  */
 220                                 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
 221                                                                     ifmt,
 222                                                                     skb->data,
 223                                                                     skb->data,
 224                                                                     skb->len));
 225                                 break;
 226                         case 5:
 227                                 /* a-law */
 228                                 if (!ifmt)
 229                                         isdn_audio_ulaw2alaw(skb->data, skb->len);
 230                                 break;
 231                         case 6:
 232                                 /* u-law */
 233                                 if (ifmt)
 234                                         isdn_audio_alaw2ulaw(skb->data, skb->len);
 235                                 break;
 236                 }
 237                 ISDN_AUDIO_SKB_DLECOUNT(skb) =
 238                         isdn_tty_countDLE(skb->data, skb->len);
 239         }
 240 #ifdef CONFIG_ISDN_TTY_FAX
 241         else {
 242                 if (info->faxonline & 2) {
 243                         isdn_tty_fax_bitorder(info, skb);
 244                         ISDN_AUDIO_SKB_DLECOUNT(skb) =
 245                                 isdn_tty_countDLE(skb->data, skb->len);
 246                 }
 247         }
 248 #endif
 249 #endif
 250         /* Try to deliver directly via tty-buf if queue is empty */
 251         spin_lock_irqsave(&info->readlock, flags);
 252         if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
 253                 if (isdn_tty_try_read(info, skb)) {
 254                         spin_unlock_irqrestore(&info->readlock, flags);
 255                         return 1;
 256                 }
 257         /* Direct deliver failed or queue wasn't empty.
 258          * Queue up for later dequeueing via timer-irq.
 259          */
 260         __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
 261         dev->drv[di]->rcvcount[channel] +=
 262                 (skb->len
 263 #ifdef CONFIG_ISDN_AUDIO
 264                  + ISDN_AUDIO_SKB_DLECOUNT(skb)
 265 #endif
 266                         );
 267         spin_unlock_irqrestore(&info->readlock, flags);
 268         /* Schedule dequeuing */
 269         if ((dev->modempoll) && (info->rcvsched))
 270                 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
 271         return 1;
 272 }
 273
 274 static void
 275 isdn_tty_cleanup_xmit(modem_info * info)
 276 {
 277         skb_queue_purge(&info->xmit_queue);
 278 #ifdef CONFIG_ISDN_AUDIO
 279         skb_queue_purge(&info->dtmf_queue);
 280 #endif
 281 }
 282
 283 static void
 284 isdn_tty_tint(modem_info * info)
 285 {
 286         struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
 287         int len, slen;
 288
 289         if (!skb)
 290                 return;
 291         len = skb->len;
 292         if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
 293                                            info->isdn_channel, 1, skb)) == len) {
 294                 struct tty_struct *tty = info->tty;
 295                 info->send_outstanding++;
 296                 info->msr &= ~UART_MSR_CTS;
 297                 info->lsr &= ~UART_LSR_TEMT;
 298                 tty_wakeup(tty);
 299                 return;
 300         }
 301         if (slen < 0) {
 302                 /* Error: no channel, already shutdown, or wrong parameter */
 303                 dev_kfree_skb(skb);
 304                 return;
 305         }
 306         skb_queue_head(&info->xmit_queue, skb);
 307 }
 308
 309 #ifdef CONFIG_ISDN_AUDIO
 310 static int
 311 isdn_tty_countDLE(unsigned char *buf, int len)
 312 {
 313         int count = 0;
 314
 315         while (len--)
 316                 if (*buf++ == DLE)
 317                         count++;
 318         return count;
 319 }
 320
 321 /* This routine is called from within isdn_tty_write() to perform
 322  * DLE-decoding when sending audio-data.
 323  */
 324 static int
 325 isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
 326 {
 327         unsigned char *p = &info->xmit_buf[info->xmit_count];
 328         int count = 0;
 329
 330         while (len > 0) {
 331                 if (m->lastDLE) {
 332                         m->lastDLE = 0;
 333                         switch (*p) {
 334                                 case DLE:
 335                                         /* Escape code */
 336                                         if (len > 1)
 337                                                 memmove(p, p + 1, len - 1);
 338                                         p--;
 339                                         count++;
 340                                         break;
 341                                 case ETX:
 342                                         /* End of data */
 343                                         info->vonline |= 4;
 344                                         return count;
 345                                 case DC4:
 346                                         /* Abort RX */
 347                                         info->vonline &= ~1;
 348 #ifdef ISDN_DEBUG_MODEM_VOICE
 349                                         printk(KERN_DEBUG
 350                                                "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
 351                                                info->line);
 352 #endif
 353                                         isdn_tty_at_cout("\020\003", info);
 354                                         if (!info->vonline) {
 355 #ifdef ISDN_DEBUG_MODEM_VOICE
 356                                                 printk(KERN_DEBUG
 357                                                        "DLEdown: send VCON on ttyI%d\n",
 358                                                        info->line);
 359 #endif
 360                                                 isdn_tty_at_cout("\r\nVCON\r\n", info);
 361                                         }
 362                                         /* Fall through */
 363                                 case 'q':
 364                                 case 's':
 365                                         /* Silence */
 366                                         if (len > 1)
 367                                                 memmove(p, p + 1, len - 1);
 368                                         p--;
 369                                         break;
 370                         }
 371                 } else {
 372                         if (*p == DLE)
 373                                 m->lastDLE = 1;
 374                         else
 375                                 count++;
 376                 }
 377                 p++;
 378                 len--;
 379         }
 380         if (len < 0) {
 381                 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
 382                 return 0;
 383         }
 384         return count;
 385 }
 386
 387 /* This routine is called from within isdn_tty_write() when receiving
 388  * audio-data. It interrupts receiving, if an character other than
 389  * ^S or ^Q is sent.
 390  */
 391 static int
 392 isdn_tty_end_vrx(const char *buf, int c)
 393 {
 394         char ch;
 395
 396         while (c--) {
 397                 ch = *buf;
 398                 if ((ch != 0x11) && (ch != 0x13))
 399                         return 1;
 400                 buf++;
 401         }
 402         return 0;
 403 }
 404
 405 static int voice_cf[7] =
 406 {0, 0, 4, 3, 2, 0, 0};
 407
 408 #endif                          /* CONFIG_ISDN_AUDIO */
 409
 410 /* isdn_tty_senddown() is called either directly from within isdn_tty_write()
 411  * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
 412  * outgoing data from the tty's xmit-buffer, handles voice-decompression or
 413  * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
 414  */
 415 static void
 416 isdn_tty_senddown(modem_info * info)
 417 {
 418         int buflen;
 419         int skb_res;
 420 #ifdef CONFIG_ISDN_AUDIO
 421         int audio_len;
 422 #endif
 423         struct sk_buff *skb;
 424
 425 #ifdef CONFIG_ISDN_AUDIO
 426         if (info->vonline & 4) {
 427                 info->vonline &= ~6;
 428                 if (!info->vonline) {
 429 #ifdef ISDN_DEBUG_MODEM_VOICE
 430                         printk(KERN_DEBUG
 431                                "senddown: send VCON on ttyI%d\n",
 432                                info->line);
 433 #endif
 434                         isdn_tty_at_cout("\r\nVCON\r\n", info);
 435                 }
 436         }
 437 #endif
 438         if (!(buflen = info->xmit_count))
 439                 return;
 440         if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
 441                 info->msr &= ~UART_MSR_CTS;
 442         info->lsr &= ~UART_LSR_TEMT;
 443         /* info->xmit_count is modified here and in isdn_tty_write().
 444          * So we return here if isdn_tty_write() is in the
 445          * critical section.
 446          */
 447         atomic_inc(&info->xmit_lock);
 448         if (!(atomic_dec_and_test(&info->xmit_lock)))
 449                 return;
 450         if (info->isdn_driver < 0) {
 451                 info->xmit_count = 0;
 452                 return;
 453         }
 454         skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
 455 #ifdef CONFIG_ISDN_AUDIO
 456         if (info->vonline & 2)
 457                 audio_len = buflen * voice_cf[info->emu.vpar[3]];
 458         else
 459                 audio_len = 0;
 460         skb = dev_alloc_skb(skb_res + buflen + audio_len);
 461 #else
 462         skb = dev_alloc_skb(skb_res + buflen);
 463 #endif
 464         if (!skb) {
 465                 printk(KERN_WARNING
 466                        "isdn_tty: Out of memory in ttyI%d senddown\n",
 467                        info->line);
 468                 return;
 469         }
 470         skb_reserve(skb, skb_res);
 471         memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
 472         info->xmit_count = 0;
 473 #ifdef CONFIG_ISDN_AUDIO
 474         if (info->vonline & 2) {
 475                 /* For now, ifmt is fixed to 1 (alaw), since this
 476                  * is used with ISDN everywhere in the world, except
 477                  * US, Canada and Japan.
 478                  * Later, when US-ISDN protocols are implemented,
 479                  * this setting will depend on the D-channel protocol.
 480                  */
 481                 int ifmt = 1;
 482
 483                 /* voice conversion/decompression */
 484                 switch (info->emu.vpar[3]) {
 485                         case 2:
 486                         case 3:
 487                         case 4:
 488                                 /* adpcm, compatible to ZyXel 1496 modem
 489                                  * with ROM revision 6.01
 490                                  */
 491                                 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
 492                                                                   ifmt,
 493                                                                   skb->data,
 494                                                     skb_put(skb, audio_len),
 495                                                                   buflen);
 496                                 skb_pull(skb, buflen);
 497                                 skb_trim(skb, audio_len);
 498                                 break;
 499                         case 5:
 500                                 /* a-law */
 501                                 if (!ifmt)
 502                                         isdn_audio_alaw2ulaw(skb->data,
 503                                                              buflen);
 504                                 break;
 505                         case 6:
 506                                 /* u-law */
 507                                 if (ifmt)
 508                                         isdn_audio_ulaw2alaw(skb->data,
 509                                                              buflen);
 510                                 break;
 511                 }
 512         }
 513 #endif                          /* CONFIG_ISDN_AUDIO */
 514         if (info->emu.mdmreg[REG_T70] & BIT_T70) {
 515                 /* Add T.70 simplified header */
 516                 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
 517                         memcpy(skb_push(skb, 2), "\1\0", 2);
 518                 else
 519                         memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
 520         }
 521         skb_queue_tail(&info->xmit_queue, skb);
 522 }
 523
 524 /************************************************************
 525  *
 526  * Modem-functions
 527  *
 528  * mostly "stolen" from original Linux-serial.c and friends.
 529  *
 530  ************************************************************/
 531
 532 /* The next routine is called once from within timer-interrupt
 533  * triggered within isdn_tty_modem_ncarrier(). It calls
 534  * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
 535  * into the tty's buffer.
 536  */
 537 static void
 538 isdn_tty_modem_do_ncarrier(unsigned long data)
 539 {
 540         modem_info *info = (modem_info *) data;
 541         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
 542 }
 543
 544 /* Next routine is called, whenever the DTR-signal is raised.
 545  * It checks the ncarrier-flag, and triggers the above routine
 546  * when necessary. The ncarrier-flag is set, whenever DTR goes
 547  * low.
 548  */
 549 static void
 550 isdn_tty_modem_ncarrier(modem_info * info)
 551 {
 552         if (info->ncarrier) {
 553                 info->nc_timer.expires = jiffies + HZ;
 554                 add_timer(&info->nc_timer);
 555         }
 556 }
 557
 558 /*
 559  * return the usage calculated by si and layer 2 protocol
 560  */
 561 static int
 562 isdn_calc_usage(int si, int l2)
 563 {
 564         int usg = ISDN_USAGE_MODEM;
 565
 566 #ifdef CONFIG_ISDN_AUDIO
 567         if (si == 1) {
 568                 switch(l2) {
 569                         case ISDN_PROTO_L2_MODEM:
 570                                 usg = ISDN_USAGE_MODEM;
 571                                 break;
 572 #ifdef CONFIG_ISDN_TTY_FAX
 573                         case ISDN_PROTO_L2_FAX:
 574                                 usg = ISDN_USAGE_FAX;
 575                                 break;
 576 #endif
 577                         case ISDN_PROTO_L2_TRANS:
 578                         default:
 579                                 usg = ISDN_USAGE_VOICE;
 580                                 break;
 581                 }
 582         }
 583 #endif
 584         return(usg);
 585 }
 586
 587 /* isdn_tty_dial() performs dialing of a tty an the necessary
 588  * setup of the lower levels before that.
 589  */
 590 static void
 591 isdn_tty_dial(char *n, modem_info * info, atemu * m)
 592 {
 593         int usg = ISDN_USAGE_MODEM;
 594         int si = 7;
 595         int l2 = m->mdmreg[REG_L2PROT];
 596         u_long flags;
 597         isdn_ctrl cmd;
 598         int i;
 599         int j;
 600
 601         for (j = 7; j >= 0; j--)
 602                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 603                         si = bit2si[j];
 604                         break;
 605                 }
 606         usg = isdn_calc_usage(si, l2);
 607 #ifdef CONFIG_ISDN_AUDIO
 608         if ((si == 1) &&
 609                 (l2 != ISDN_PROTO_L2_MODEM)
 610 #ifdef CONFIG_ISDN_TTY_FAX
 611                 && (l2 != ISDN_PROTO_L2_FAX)
 612 #endif
 613                 ) {
 614                 l2 = ISDN_PROTO_L2_TRANS;
 615                 usg = ISDN_USAGE_VOICE;
 616         }
 617 #endif
 618         m->mdmreg[REG_SI1I] = si2bit[si];
 619         spin_lock_irqsave(&dev->lock, flags);
 620         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 621         if (i < 0) {
 622                 spin_unlock_irqrestore(&dev->lock, flags);
 623                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 624         } else {
 625                 info->isdn_driver = dev->drvmap[i];
 626                 info->isdn_channel = dev->chanmap[i];
 627                 info->drv_index = i;
 628                 dev->m_idx[i] = info->line;
 629                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 630                 info->last_dir = 1;
 631                 strcpy(info->last_num, n);
 632                 isdn_info_update();
 633                 spin_unlock_irqrestore(&dev->lock, flags);
 634                 cmd.driver = info->isdn_driver;
 635                 cmd.arg = info->isdn_channel;
 636                 cmd.command = ISDN_CMD_CLREAZ;
 637                 isdn_command(&cmd);
 638                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 639                 cmd.driver = info->isdn_driver;
 640                 cmd.command = ISDN_CMD_SETEAZ;
 641                 isdn_command(&cmd);
 642                 cmd.driver = info->isdn_driver;
 643                 cmd.command = ISDN_CMD_SETL2;
 644                 info->last_l2 = l2;
 645                 cmd.arg = info->isdn_channel + (l2 << 8);
 646                 isdn_command(&cmd);
 647                 cmd.driver = info->isdn_driver;
 648                 cmd.command = ISDN_CMD_SETL3;
 649                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 650 #ifdef CONFIG_ISDN_TTY_FAX
 651                 if (l2 == ISDN_PROTO_L2_FAX) {
 652                         cmd.parm.fax = info->fax;
 653                         info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
 654                 }
 655 #endif
 656                 isdn_command(&cmd);
 657                 cmd.driver = info->isdn_driver;
 658                 cmd.arg = info->isdn_channel;
 659                 sprintf(cmd.parm.setup.phone, "%s", n);
 660                 sprintf(cmd.parm.setup.eazmsn, "%s",
 661                         isdn_map_eaz2msn(m->msn, info->isdn_driver));
 662                 cmd.parm.setup.si1 = si;
 663                 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
 664                 cmd.command = ISDN_CMD_DIAL;
 665                 info->dialing = 1;
 666                 info->emu.carrierwait = 0;
 667                 strcpy(dev->num[i], n);
 668                 isdn_info_update();
 669                 isdn_command(&cmd);
 670                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
 671         }
 672 }
 673
 674 /* isdn_tty_hangup() disassociates a tty from the real
 675  * ISDN-line (hangup). The usage-status is cleared
 676  * and some cleanup is done also.
 677  */
 678 void
 679 isdn_tty_modem_hup(modem_info * info, int local)
 680 {
 681         isdn_ctrl cmd;
 682         int di, ch;
 683
 684         if (!info)
 685                 return;
 686
 687         di = info->isdn_driver;
 688         ch = info->isdn_channel;
 689         if (di < 0 || ch < 0)
 690                 return;
 691
 692         info->isdn_driver = -1;
 693         info->isdn_channel = -1;
 694
 695 #ifdef ISDN_DEBUG_MODEM_HUP
 696         printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
 697 #endif
 698         info->rcvsched = 0;
 699         isdn_tty_flush_buffer(info->tty);
 700         if (info->online) {
 701                 info->last_lhup = local;
 702                 info->online = 0;
 703                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
 704         }
 705 #ifdef CONFIG_ISDN_AUDIO
 706         info->vonline = 0;
 707 #ifdef CONFIG_ISDN_TTY_FAX
 708         info->faxonline = 0;
 709         info->fax->phase = ISDN_FAX_PHASE_IDLE;
 710 #endif
 711         info->emu.vpar[4] = 0;
 712         info->emu.vpar[5] = 8;
 713         kfree(info->dtmf_state);
 714         info->dtmf_state = NULL;
 715         kfree(info->silence_state);
 716         info->silence_state = NULL;
 717         kfree(info->adpcms);
 718         info->adpcms = NULL;
 719         kfree(info->adpcmr);
 720         info->adpcmr = NULL;
 721 #endif
 722         if ((info->msr & UART_MSR_RI) &&
 723                 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
 724                 isdn_tty_modem_result(RESULT_RUNG, info);
 725         info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
 726         info->lsr |= UART_LSR_TEMT;
 727
 728         if (local) {
 729                 cmd.driver = di;
 730                 cmd.command = ISDN_CMD_HANGUP;
 731                 cmd.arg = ch;
 732                 isdn_command(&cmd);
 733         }
 734
 735         isdn_all_eaz(di, ch);
 736         info->emu.mdmreg[REG_RINGCNT] = 0;
 737         isdn_free_channel(di, ch, 0);
 738
 739         if (info->drv_index >= 0) {
 740                 dev->m_idx[info->drv_index] = -1;
 741                 info->drv_index = -1;
 742         }
 743 }
 744
 745 /*
 746  * Begin of a CAPI like interface, currently used only for
 747  * supplementary service (CAPI 2.0 part III)
 748  */
 749 #include <linux/isdn/capicmd.h>
 750
 751 int
 752 isdn_tty_capi_facility(capi_msg *cm) {
 753         return(-1); /* dummy */
 754 }
 755
 756 /* isdn_tty_suspend() tries to suspend the current tty connection
 757  */
 758 static void
 759 isdn_tty_suspend(char *id, modem_info * info, atemu * m)
 760 {
 761         isdn_ctrl cmd;
 762
 763         int l;
 764
 765         if (!info)
 766                 return;
 767
 768 #ifdef ISDN_DEBUG_MODEM_SERVICES
 769         printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
 770 #endif
 771         l = strlen(id);
 772         if ((info->isdn_driver >= 0)) {
 773                 cmd.parm.cmsg.Length = l+18;
 774                 cmd.parm.cmsg.Command = CAPI_FACILITY;
 775                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 776                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 777                 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
 778                 cmd.parm.cmsg.para[1] = 0;
 779                 cmd.parm.cmsg.para[2] = l + 3;
 780                 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
 781                 cmd.parm.cmsg.para[4] = 0;
 782                 cmd.parm.cmsg.para[5] = l;
 783                 strncpy(&cmd.parm.cmsg.para[6], id, l);
 784                 cmd.command = CAPI_PUT_MESSAGE;
 785                 cmd.driver = info->isdn_driver;
 786                 cmd.arg = info->isdn_channel;
 787                 isdn_command(&cmd);
 788         }
 789 }
 790
 791 /* isdn_tty_resume() tries to resume a suspended call
 792  * setup of the lower levels before that. unfortunatly here is no
 793  * checking for compatibility of used protocols implemented by Q931
 794  * It does the same things like isdn_tty_dial, the last command
 795  * is different, may be we can merge it.
 796  */
 797
 798 static void
 799 isdn_tty_resume(char *id, modem_info * info, atemu * m)
 800 {
 801         int usg = ISDN_USAGE_MODEM;
 802         int si = 7;
 803         int l2 = m->mdmreg[REG_L2PROT];
 804         isdn_ctrl cmd;
 805         ulong flags;
 806         int i;
 807         int j;
 808         int l;
 809
 810         l = strlen(id);
 811         for (j = 7; j >= 0; j--)
 812                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 813                         si = bit2si[j];
 814                         break;
 815                 }
 816         usg = isdn_calc_usage(si, l2);
 817 #ifdef CONFIG_ISDN_AUDIO
 818         if ((si == 1) &&
 819                 (l2 != ISDN_PROTO_L2_MODEM)
 820 #ifdef CONFIG_ISDN_TTY_FAX
 821                 && (l2 != ISDN_PROTO_L2_FAX)
 822 #endif
 823                 ) {
 824                 l2 = ISDN_PROTO_L2_TRANS;
 825                 usg = ISDN_USAGE_VOICE;
 826         }
 827 #endif
 828         m->mdmreg[REG_SI1I] = si2bit[si];
 829         spin_lock_irqsave(&dev->lock, flags);
 830         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 831         if (i < 0) {
 832                 spin_unlock_irqrestore(&dev->lock, flags);
 833                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 834         } else {
 835                 info->isdn_driver = dev->drvmap[i];
 836                 info->isdn_channel = dev->chanmap[i];
 837                 info->drv_index = i;
 838                 dev->m_idx[i] = info->line;
 839                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 840                 info->last_dir = 1;
 841 //              strcpy(info->last_num, n);
 842                 isdn_info_update();
 843                 spin_unlock_irqrestore(&dev->lock, flags);
 844                 cmd.driver = info->isdn_driver;
 845                 cmd.arg = info->isdn_channel;
 846                 cmd.command = ISDN_CMD_CLREAZ;
 847                 isdn_command(&cmd);
 848                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 849                 cmd.driver = info->isdn_driver;
 850                 cmd.command = ISDN_CMD_SETEAZ;
 851                 isdn_command(&cmd);
 852                 cmd.driver = info->isdn_driver;
 853                 cmd.command = ISDN_CMD_SETL2;
 854                 info->last_l2 = l2;
 855                 cmd.arg = info->isdn_channel + (l2 << 8);
 856                 isdn_command(&cmd);
 857                 cmd.driver = info->isdn_driver;
 858                 cmd.command = ISDN_CMD_SETL3;
 859                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 860                 isdn_command(&cmd);
 861                 cmd.driver = info->isdn_driver;
 862                 cmd.arg = info->isdn_channel;
 863                 cmd.parm.cmsg.Length = l+18;
 864                 cmd.parm.cmsg.Command = CAPI_FACILITY;
 865                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 866                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 867                 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
 868                 cmd.parm.cmsg.para[1] = 0;
 869                 cmd.parm.cmsg.para[2] = l+3;
 870                 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
 871                 cmd.parm.cmsg.para[4] = 0;
 872                 cmd.parm.cmsg.para[5] = l;
 873                 strncpy(&cmd.parm.cmsg.para[6], id, l);
 874                 cmd.command =CAPI_PUT_MESSAGE;
 875                 info->dialing = 1;
 876 //              strcpy(dev->num[i], n);
 877                 isdn_info_update();
 878                 isdn_command(&cmd);
 879                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
 880         }
 881 }
 882
 883 /* isdn_tty_send_msg() sends a message to a HL driver
 884  * This is used for hybrid modem cards to send AT commands to it
 885  */
 886
 887 static void
 888 isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
 889 {
 890         int usg = ISDN_USAGE_MODEM;
 891         int si = 7;
 892         int l2 = m->mdmreg[REG_L2PROT];
 893         isdn_ctrl cmd;
 894         ulong flags;
 895         int i;
 896         int j;
 897         int l;
 898
 899         l = strlen(msg);
 900         if (!l) {
 901                 isdn_tty_modem_result(RESULT_ERROR, info);
 902                 return;
 903         }
 904         for (j = 7; j >= 0; j--)
 905                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 906                         si = bit2si[j];
 907                         break;
 908                 }
 909         usg = isdn_calc_usage(si, l2);
 910 #ifdef CONFIG_ISDN_AUDIO
 911         if ((si == 1) &&
 912                 (l2 != ISDN_PROTO_L2_MODEM)
 913 #ifdef CONFIG_ISDN_TTY_FAX
 914                 && (l2 != ISDN_PROTO_L2_FAX)
 915 #endif
 916                 ) {
 917                 l2 = ISDN_PROTO_L2_TRANS;
 918                 usg = ISDN_USAGE_VOICE;
 919         }
 920 #endif
 921         m->mdmreg[REG_SI1I] = si2bit[si];
 922         spin_lock_irqsave(&dev->lock, flags);
 923         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 924         if (i < 0) {
 925                 spin_unlock_irqrestore(&dev->lock, flags);
 926                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 927         } else {
 928                 info->isdn_driver = dev->drvmap[i];
 929                 info->isdn_channel = dev->chanmap[i];
 930                 info->drv_index = i;
 931                 dev->m_idx[i] = info->line;
 932                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 933                 info->last_dir = 1;
 934                 isdn_info_update();
 935                 spin_unlock_irqrestore(&dev->lock, flags);
 936                 cmd.driver = info->isdn_driver;
 937                 cmd.arg = info->isdn_channel;
 938                 cmd.command = ISDN_CMD_CLREAZ;
 939                 isdn_command(&cmd);
 940                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 941                 cmd.driver = info->isdn_driver;
 942                 cmd.command = ISDN_CMD_SETEAZ;
 943                 isdn_command(&cmd);
 944                 cmd.driver = info->isdn_driver;
 945                 cmd.command = ISDN_CMD_SETL2;
 946                 info->last_l2 = l2;
 947                 cmd.arg = info->isdn_channel + (l2 << 8);
 948                 isdn_command(&cmd);
 949                 cmd.driver = info->isdn_driver;
 950                 cmd.command = ISDN_CMD_SETL3;
 951                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 952                 isdn_command(&cmd);
 953                 cmd.driver = info->isdn_driver;
 954                 cmd.arg = info->isdn_channel;
 955                 cmd.parm.cmsg.Length = l+14;
 956                 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
 957                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 958                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 959                 cmd.parm.cmsg.para[0] = l+1;
 960                 strncpy(&cmd.parm.cmsg.para[1], msg, l);
 961                 cmd.parm.cmsg.para[l+1] = 0xd;
 962                 cmd.command =CAPI_PUT_MESSAGE;
 963 /*              info->dialing = 1;
 964                 strcpy(dev->num[i], n);
 965                 isdn_info_update();
 966 */
 967                 isdn_command(&cmd);
 968         }
 969 }
 970
 971 static inline int
 972 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
 973 {
 974 #ifdef MODEM_PARANOIA_CHECK
 975         if (!info) {
 976                 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
 977                         name, routine);
 978                 return 1;
 979         }
 980         if (info->magic != ISDN_ASYNC_MAGIC) {
 981                 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
 982                        name, routine);
 983                 return 1;
 984         }
 985 #endif
 986         return 0;
 987 }
 988
 989 /*
 990  * This routine is called to set the UART divisor registers to match
 991  * the specified baud rate for a serial port.
 992  */
 993 static void
 994 isdn_tty_change_speed(modem_info * info)
 995 {
 996         uint cflag,
 997          cval,
 998          fcr,
 999          quot;
1000         int i;
1001
1002         if (!info->tty || !info->tty->termios)
1003                 return;
1004         cflag = info->tty->termios->c_cflag;
1005
1006         quot = i = cflag & CBAUD;
1007         if (i & CBAUDEX) {
1008                 i &= ~CBAUDEX;
1009                 if (i < 1 || i > 2)
1010                         info->tty->termios->c_cflag &= ~CBAUDEX;
1011                 else
1012                         i += 15;
1013         }
1014         if (quot) {
1015                 info->mcr |= UART_MCR_DTR;
1016                 isdn_tty_modem_ncarrier(info);
1017         } else {
1018                 info->mcr &= ~UART_MCR_DTR;
1019                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1020 #ifdef ISDN_DEBUG_MODEM_HUP
1021                         printk(KERN_DEBUG "Mhup in changespeed\n");
1022 #endif
1023                         if (info->online)
1024                                 info->ncarrier = 1;
1025                         isdn_tty_modem_reset_regs(info, 0);
1026                         isdn_tty_modem_hup(info, 1);
1027                 }
1028                 return;
1029         }
1030         /* byte size and parity */
1031         cval = cflag & (CSIZE | CSTOPB);
1032         cval >>= 4;
1033         if (cflag & PARENB)
1034                 cval |= UART_LCR_PARITY;
1035         if (!(cflag & PARODD))
1036                 cval |= UART_LCR_EPAR;
1037         fcr = 0;
1038
1039         /* CTS flow control flag and modem status interrupts */
1040         if (cflag & CRTSCTS) {
1041                 info->flags |= ISDN_ASYNC_CTS_FLOW;
1042         } else
1043                 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1044         if (cflag & CLOCAL)
1045                 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1046         else {
1047                 info->flags |= ISDN_ASYNC_CHECK_CD;
1048         }
1049 }
1050
1051 static int
1052 isdn_tty_startup(modem_info * info)
1053 {
1054         if (info->flags & ISDN_ASYNC_INITIALIZED)
1055                 return 0;
1056         isdn_lock_drivers();
1057 #ifdef ISDN_DEBUG_MODEM_OPEN
1058         printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1059 #endif
1060         /*
1061          * Now, initialize the UART
1062          */
1063         info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1064         if (info->tty)
1065                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1066         /*
1067          * and set the speed of the serial port
1068          */
1069         isdn_tty_change_speed(info);
1070
1071         info->flags |= ISDN_ASYNC_INITIALIZED;
1072         info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1073         info->send_outstanding = 0;
1074         return 0;
1075 }
1076
1077 /*
1078  * This routine will shutdown a serial port; interrupts are disabled, and
1079  * DTR is dropped if the hangup on close termio flag is on.
1080  */
1081 static void
1082 isdn_tty_shutdown(modem_info * info)
1083 {
1084         if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1085                 return;
1086 #ifdef ISDN_DEBUG_MODEM_OPEN
1087         printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1088 #endif
1089         isdn_unlock_drivers();
1090         info->msr &= ~UART_MSR_RI;
1091         if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1092                 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1093                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1094                         isdn_tty_modem_reset_regs(info, 0);
1095 #ifdef ISDN_DEBUG_MODEM_HUP
1096                         printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1097 #endif
1098                         isdn_tty_modem_hup(info, 1);
1099                 }
1100         }
1101         if (info->tty)
1102                 set_bit(TTY_IO_ERROR, &info->tty->flags);
1103
1104         info->flags &= ~ISDN_ASYNC_INITIALIZED;
1105 }
1106
1107 /* isdn_tty_write() is the main send-routine. It is called from the upper
1108  * levels within the kernel to perform sending data. Depending on the
1109  * online-flag it either directs output to the at-command-interpreter or
1110  * to the lower level. Additional tasks done here:
1111  *  - If online, check for escape-sequence (+++)
1112  *  - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1113  *  - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1114  *  - If dialing, abort dial.
1115  */
1116 static int
1117 isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
1118 {
1119         int c;
1120         int total = 0;
1121         modem_info *info = (modem_info *) tty->driver_data;
1122         atemu *m = &info->emu;
1123
1124         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1125                 return 0;
1126         /* See isdn_tty_senddown() */
1127         atomic_inc(&info->xmit_lock);
1128         while (1) {
1129                 c = count;
1130                 if (c > info->xmit_size - info->xmit_count)
1131                         c = info->xmit_size - info->xmit_count;
1132                 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1133                         c = dev->drv[info->isdn_driver]->maxbufsize;
1134                 if (c <= 0)
1135                         break;
1136                 if ((info->online > 1)
1137 #ifdef CONFIG_ISDN_AUDIO
1138                     || (info->vonline & 3)
1139 #endif
1140                         ) {
1141 #ifdef CONFIG_ISDN_AUDIO
1142                         if (!info->vonline)
1143 #endif
1144                                 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1145                                                    &(m->pluscount),
1146                                                    &(m->lastplus));
1147                         memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1148 #ifdef CONFIG_ISDN_AUDIO
1149                         if (info->vonline) {
1150                                 int cc = isdn_tty_handleDLEdown(info, m, c);
1151                                 if (info->vonline & 2) {
1152                                         if (!cc) {
1153                                                 /* If DLE decoding results in zero-transmit, but
1154                                                  * c originally was non-zero, do a wakeup.
1155                                                  */
1156                                                 tty_wakeup(tty);
1157                                                 info->msr |= UART_MSR_CTS;
1158                                                 info->lsr |= UART_LSR_TEMT;
1159                                         }
1160                                         info->xmit_count += cc;
1161                                 }
1162                                 if ((info->vonline & 3) == 1) {
1163                                         /* Do NOT handle Ctrl-Q or Ctrl-S
1164                                          * when in full-duplex audio mode.
1165                                          */
1166                                         if (isdn_tty_end_vrx(buf, c)) {
1167                                                 info->vonline &= ~1;
1168 #ifdef ISDN_DEBUG_MODEM_VOICE
1169                                                 printk(KERN_DEBUG
1170                                                        "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1171                                                        info->line);
1172 #endif
1173                                                 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1174                                         }
1175                                 }
1176                         } else
1177                         if (TTY_IS_FCLASS1(info)) {
1178                                 int cc = isdn_tty_handleDLEdown(info, m, c);
1179
1180                                 if (info->vonline & 4) { /* ETX seen */
1181                                         isdn_ctrl c;
1182
1183                                         c.command = ISDN_CMD_FAXCMD;
1184                                         c.driver = info->isdn_driver;
1185                                         c.arg = info->isdn_channel;
1186                                         c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1187                                         c.parm.aux.subcmd = ETX;
1188                                         isdn_command(&c);
1189                                 }
1190                                 info->vonline = 0;
1191 #ifdef ISDN_DEBUG_MODEM_VOICE
1192                                 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1193 #endif
1194                                 info->xmit_count += cc;
1195                         } else
1196 #endif
1197                                 info->xmit_count += c;
1198                 } else {
1199                         info->msr |= UART_MSR_CTS;
1200                         info->lsr |= UART_LSR_TEMT;
1201                         if (info->dialing) {
1202                                 info->dialing = 0;
1203 #ifdef ISDN_DEBUG_MODEM_HUP
1204                                 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1205 #endif
1206                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1207                                 isdn_tty_modem_hup(info, 1);
1208                         } else
1209                                 c = isdn_tty_edit_at(buf, c, info);
1210                 }
1211                 buf += c;
1212                 count -= c;
1213                 total += c;
1214         }
1215         atomic_dec(&info->xmit_lock);
1216         if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1217                 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1218                         isdn_tty_senddown(info);
1219                         isdn_tty_tint(info);
1220                 }
1221                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1222         }
1223         return total;
1224 }
1225
1226 static int
1227 isdn_tty_write_room(struct tty_struct *tty)
1228 {
1229         modem_info *info = (modem_info *) tty->driver_data;
1230         int ret;
1231
1232         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1233                 return 0;
1234         if (!info->online)
1235                 return info->xmit_size;
1236         ret = info->xmit_size - info->xmit_count;
1237         return (ret < 0) ? 0 : ret;
1238 }
1239
1240 static int
1241 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1242 {
1243         modem_info *info = (modem_info *) tty->driver_data;
1244
1245         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1246                 return 0;
1247         if (!info->online)
1248                 return 0;
1249         return (info->xmit_count);
1250 }
1251
1252 static void
1253 isdn_tty_flush_buffer(struct tty_struct *tty)
1254 {
1255         modem_info *info;
1256
1257         if (!tty) {
1258                 return;
1259         }
1260         info = (modem_info *) tty->driver_data;
1261         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1262                 return;
1263         }
1264         isdn_tty_cleanup_xmit(info);
1265         info->xmit_count = 0;
1266         tty_wakeup(tty);
1267 }
1268
1269 static void
1270 isdn_tty_flush_chars(struct tty_struct *tty)
1271 {
1272         modem_info *info = (modem_info *) tty->driver_data;
1273
1274         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1275                 return;
1276         if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1277                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1278 }
1279
1280 /*
1281  * ------------------------------------------------------------
1282  * isdn_tty_throttle()
1283  *
1284  * This routine is called by the upper-layer tty layer to signal that
1285  * incoming characters should be throttled.
1286  * ------------------------------------------------------------
1287  */
1288 static void
1289 isdn_tty_throttle(struct tty_struct *tty)
1290 {
1291         modem_info *info = (modem_info *) tty->driver_data;
1292
1293         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1294                 return;
1295         if (I_IXOFF(tty))
1296                 info->x_char = STOP_CHAR(tty);
1297         info->mcr &= ~UART_MCR_RTS;
1298 }
1299
1300 static void
1301 isdn_tty_unthrottle(struct tty_struct *tty)
1302 {
1303         modem_info *info = (modem_info *) tty->driver_data;
1304
1305         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1306                 return;
1307         if (I_IXOFF(tty)) {
1308                 if (info->x_char)
1309                         info->x_char = 0;
1310                 else
1311                         info->x_char = START_CHAR(tty);
1312         }
1313         info->mcr |= UART_MCR_RTS;
1314 }
1315
1316 /*
1317  * ------------------------------------------------------------
1318  * isdn_tty_ioctl() and friends
1319  * ------------------------------------------------------------
1320  */
1321
1322 /*
1323  * isdn_tty_get_lsr_info - get line status register info
1324  *
1325  * Purpose: Let user call ioctl() to get info when the UART physically
1326  *          is emptied.  On bus types like RS485, the transmitter must
1327  *          release the bus after transmitting. This must be done when
1328  *          the transmit shift register is empty, not be done when the
1329  *          transmit holding register is empty.  This functionality
1330  *          allows RS485 driver to be written in user space.
1331  */
1332 static int
1333 isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1334 {
1335         u_char status;
1336         uint result;
1337
1338         status = info->lsr;
1339         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1340         return put_user(result, value);
1341 }
1342
1343
1344 static int
1345 isdn_tty_tiocmget(struct tty_struct *tty, struct file *file)
1346 {
1347         modem_info *info = (modem_info *) tty->driver_data;
1348         u_char control, status;
1349
1350         if (isdn_tty_paranoia_check(info, tty->name, __FUNCTION__))
1351                 return -ENODEV;
1352         if (tty->flags & (1 << TTY_IO_ERROR))
1353                 return -EIO;
1354
1355 #ifdef ISDN_DEBUG_MODEM_IOCTL
1356         printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1357 #endif
1358
1359         control = info->mcr;
1360         status = info->msr;
1361         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1362             | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1363             | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1364             | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1365             | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1366             | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1367 }
1368
1369 static int
1370 isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
1371                 unsigned int set, unsigned int clear)
1372 {
1373         modem_info *info = (modem_info *) tty->driver_data;
1374
1375         if (isdn_tty_paranoia_check(info, tty->name, __FUNCTION__))
1376                 return -ENODEV;
1377         if (tty->flags & (1 << TTY_IO_ERROR))
1378                 return -EIO;
1379
1380 #ifdef ISDN_DEBUG_MODEM_IOCTL
1381         printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1382 #endif
1383
1384         if (set & TIOCM_RTS)
1385                 info->mcr |= UART_MCR_RTS;
1386         if (set & TIOCM_DTR) {
1387                 info->mcr |= UART_MCR_DTR;
1388                 isdn_tty_modem_ncarrier(info);
1389         }
1390
1391         if (clear & TIOCM_RTS)
1392                 info->mcr &= ~UART_MCR_RTS;
1393         if (clear & TIOCM_DTR) {
1394                 info->mcr &= ~UART_MCR_DTR;
1395                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1396                         isdn_tty_modem_reset_regs(info, 0);
1397 #ifdef ISDN_DEBUG_MODEM_HUP
1398                         printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1399 #endif
1400                         if (info->online)
1401                                 info->ncarrier = 1;
1402                         isdn_tty_modem_hup(info, 1);
1403                 }
1404         }
1405         return 0;
1406 }
1407
1408 static int
1409 isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
1410                uint cmd, ulong arg)
1411 {
1412         modem_info *info = (modem_info *) tty->driver_data;
1413         int retval;
1414
1415         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1416                 return -ENODEV;
1417         if (tty->flags & (1 << TTY_IO_ERROR))
1418                 return -EIO;
1419         switch (cmd) {
1420                 case TCSBRK:   /* SVID version: non-zero arg --> no break */
1421 #ifdef ISDN_DEBUG_MODEM_IOCTL
1422                         printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1423 #endif
1424                         retval = tty_check_change(tty);
1425                         if (retval)
1426                                 return retval;
1427                         tty_wait_until_sent(tty, 0);
1428                         return 0;
1429                 case TCSBRKP:  /* support for POSIX tcsendbreak() */
1430 #ifdef ISDN_DEBUG_MODEM_IOCTL
1431                         printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1432 #endif
1433                         retval = tty_check_change(tty);
1434                         if (retval)
1435                                 return retval;
1436                         tty_wait_until_sent(tty, 0);
1437                         return 0;
1438                 case TIOCGSOFTCAR:
1439 #ifdef ISDN_DEBUG_MODEM_IOCTL
1440                         printk(KERN_DEBUG "ttyI%d ioctl TIOCGSOFTCAR\n", info->line);
1441 #endif
1442                         return put_user(C_CLOCAL(tty) ? 1 : 0, (ulong __user *) arg);
1443                 case TIOCSSOFTCAR:
1444 #ifdef ISDN_DEBUG_MODEM_IOCTL
1445                         printk(KERN_DEBUG "ttyI%d ioctl TIOCSSOFTCAR\n", info->line);
1446 #endif
1447                         if (get_user(arg, (ulong __user *) arg))
1448                                 return -EFAULT;
1449                         tty->termios->c_cflag =
1450                             ((tty->termios->c_cflag & ~CLOCAL) |
1451                              (arg ? CLOCAL : 0));
1452                         return 0;
1453                 case TIOCSERGETLSR:     /* Get line status register */
1454 #ifdef ISDN_DEBUG_MODEM_IOCTL
1455                         printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1456 #endif
1457                         return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1458                 default:
1459 #ifdef ISDN_DEBUG_MODEM_IOCTL
1460                         printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1461 #endif
1462                         return -ENOIOCTLCMD;
1463         }
1464         return 0;
1465 }
1466
1467 static void
1468 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1469 {
1470         modem_info *info = (modem_info *) tty->driver_data;
1471
1472         if (!old_termios)
1473                 isdn_tty_change_speed(info);
1474         else {
1475                 if (tty->termios->c_cflag == old_termios->c_cflag)
1476                         return;
1477                 isdn_tty_change_speed(info);
1478                 if ((old_termios->c_cflag & CRTSCTS) &&
1479                     !(tty->termios->c_cflag & CRTSCTS)) {
1480                         tty->hw_stopped = 0;
1481                 }
1482         }
1483 }
1484
1485 /*
1486  * ------------------------------------------------------------
1487  * isdn_tty_open() and friends
1488  * ------------------------------------------------------------
1489  */
1490 static int
1491 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1492 {
1493         DECLARE_WAITQUEUE(wait, NULL);
1494         int do_clocal = 0;
1495         int retval;
1496
1497         /*
1498          * If the device is in the middle of being closed, then block
1499          * until it's done, and then try again.
1500          */
1501         if (tty_hung_up_p(filp) ||
1502             (info->flags & ISDN_ASYNC_CLOSING)) {
1503                 if (info->flags & ISDN_ASYNC_CLOSING)
1504                         interruptible_sleep_on(&info->close_wait);
1505 #ifdef MODEM_DO_RESTART
1506                 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1507                         return -EAGAIN;
1508                 else
1509                         return -ERESTARTSYS;
1510 #else
1511                 return -EAGAIN;
1512 #endif
1513         }
1514         /*
1515          * If non-blocking mode is set, then make the check up front
1516          * and then exit.
1517          */
1518         if ((filp->f_flags & O_NONBLOCK) ||
1519             (tty->flags & (1 << TTY_IO_ERROR))) {
1520                 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1521                         return -EBUSY;
1522                 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1523                 return 0;
1524         }
1525         if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1526                 if (info->normal_termios.c_cflag & CLOCAL)
1527                         do_clocal = 1;
1528         } else {
1529                 if (tty->termios->c_cflag & CLOCAL)
1530                         do_clocal = 1;
1531         }
1532         /*
1533          * Block waiting for the carrier detect and the line to become
1534          * free (i.e., not in use by the callout).  While we are in
1535          * this loop, info->count is dropped by one, so that
1536          * isdn_tty_close() knows when to free things.  We restore it upon
1537          * exit, either normal or abnormal.
1538          */
1539         retval = 0;
1540         add_wait_queue(&info->open_wait, &wait);
1541 #ifdef ISDN_DEBUG_MODEM_OPEN
1542         printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1543                info->line, info->count);
1544 #endif
1545         if (!(tty_hung_up_p(filp)))
1546                 info->count--;
1547         info->blocked_open++;
1548         while (1) {
1549                 set_current_state(TASK_INTERRUPTIBLE);
1550                 if (tty_hung_up_p(filp) ||
1551                     !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1552 #ifdef MODEM_DO_RESTART
1553                         if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1554                                 retval = -EAGAIN;
1555                         else
1556                                 retval = -ERESTARTSYS;
1557 #else
1558                         retval = -EAGAIN;
1559 #endif
1560                         break;
1561                 }
1562                 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1563                     !(info->flags & ISDN_ASYNC_CLOSING) &&
1564                     (do_clocal || (info->msr & UART_MSR_DCD))) {
1565                         break;
1566                 }
1567                 if (signal_pending(current)) {
1568                         retval = -ERESTARTSYS;
1569                         break;
1570                 }
1571 #ifdef ISDN_DEBUG_MODEM_OPEN
1572                 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1573                        info->line, info->count);
1574 #endif
1575                 schedule();
1576         }
1577         current->state = TASK_RUNNING;
1578         remove_wait_queue(&info->open_wait, &wait);
1579         if (!tty_hung_up_p(filp))
1580                 info->count++;
1581         info->blocked_open--;
1582 #ifdef ISDN_DEBUG_MODEM_OPEN
1583         printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1584                info->line, info->count);
1585 #endif
1586         if (retval)
1587                 return retval;
1588         info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1589         return 0;
1590 }
1591
1592 /*
1593  * This routine is called whenever a serial port is opened.  It
1594  * enables interrupts for a serial port, linking in its async structure into
1595  * the IRQ chain.   It also performs the serial-specific
1596  * initialization for the tty structure.
1597  */
1598 static int
1599 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1600 {
1601         modem_info *info;
1602         int retval, line;
1603
1604         line = tty->index;
1605         if (line < 0 || line > ISDN_MAX_CHANNELS)
1606                 return -ENODEV;
1607         info = &dev->mdm.info[line];
1608         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1609                 return -ENODEV;
1610         if (!try_module_get(info->owner)) {
1611                 printk(KERN_WARNING "%s: cannot reserve module\n", __FUNCTION__);
1612                 return -ENODEV;
1613         }
1614 #ifdef ISDN_DEBUG_MODEM_OPEN
1615         printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1616                info->count);
1617 #endif
1618         info->count++;
1619         tty->driver_data = info;
1620         info->tty = tty;
1621         /*
1622          * Start up serial port
1623          */
1624         retval = isdn_tty_startup(info);
1625         if (retval) {
1626 #ifdef ISDN_DEBUG_MODEM_OPEN
1627                 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1628 #endif
1629                 module_put(info->owner);
1630                 return retval;
1631         }
1632         retval = isdn_tty_block_til_ready(tty, filp, info);
1633         if (retval) {
1634 #ifdef ISDN_DEBUG_MODEM_OPEN
1635                 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1636 #endif
1637                 module_put(info->owner);
1638                 return retval;
1639         }
1640 #ifdef ISDN_DEBUG_MODEM_OPEN
1641         printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1642 #endif
1643         dev->modempoll++;
1644 #ifdef ISDN_DEBUG_MODEM_OPEN
1645         printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1646 #endif
1647         return 0;
1648 }
1649
1650 static void
1651 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1652 {
1653         modem_info *info = (modem_info *) tty->driver_data;
1654         ulong timeout;
1655
1656         if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1657                 return;
1658         if (tty_hung_up_p(filp)) {
1659 #ifdef ISDN_DEBUG_MODEM_OPEN
1660                 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1661 #endif
1662                 return;
1663         }
1664         if ((tty->count == 1) && (info->count != 1)) {
1665                 /*
1666                  * Uh, oh.  tty->count is 1, which means that the tty
1667                  * structure will be freed.  Info->count should always
1668                  * be one in these conditions.  If it's greater than
1669                  * one, we've got real problems, since it means the
1670                  * serial port won't be shutdown.
1671                  */
1672                 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1673                        "info->count is %d\n", info->count);
1674                 info->count = 1;
1675         }
1676         if (--info->count < 0) {
1677                 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1678                        info->line, info->count);
1679                 info->count = 0;
1680         }
1681         if (info->count) {
1682 #ifdef ISDN_DEBUG_MODEM_OPEN
1683                 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1684 #endif
1685                 module_put(info->owner);
1686                 return;
1687         }
1688         info->flags |= ISDN_ASYNC_CLOSING;
1689         /*
1690          * Save the termios structure, since this port may have
1691          * separate termios for callout and dialin.
1692          */
1693         if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1694                 info->normal_termios = *tty->termios;
1695         if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1696                 info->callout_termios = *tty->termios;
1697
1698         tty->closing = 1;
1699         /*
1700          * At this point we stop accepting input.  To do this, we
1701          * disable the receive line status interrupts, and tell the
1702          * interrupt driver to stop checking the data ready bit in the
1703          * line status register.
1704          */
1705         if (info->flags & ISDN_ASYNC_INITIALIZED) {
1706                 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1707                 /*
1708                  * Before we drop DTR, make sure the UART transmitter
1709                  * has completely drained; this is especially
1710                  * important if there is a transmit FIFO!
1711                  */
1712                 timeout = jiffies + HZ;
1713                 while (!(info->lsr & UART_LSR_TEMT)) {
1714                         schedule_timeout_interruptible(20);
1715                         if (time_after(jiffies,timeout))
1716                                 break;
1717                 }
1718         }
1719         dev->modempoll--;
1720         isdn_tty_shutdown(info);
1721
1722         if (tty->driver->flush_buffer)
1723                 tty->driver->flush_buffer(tty);
1724         tty_ldisc_flush(tty);
1725         info->tty = NULL;
1726         info->ncarrier = 0;
1727         tty->closing = 0;
1728         module_put(info->owner);
1729         if (info->blocked_open) {
1730                 msleep_interruptible(500);
1731                 wake_up_interruptible(&info->open_wait);
1732         }
1733         info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1734         wake_up_interruptible(&info->close_wait);
1735 #ifdef ISDN_DEBUG_MODEM_OPEN
1736         printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1737 #endif
1738 }
1739
1740 /*
1741  * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1742  */
1743 static void
1744 isdn_tty_hangup(struct tty_struct *tty)
1745 {
1746         modem_info *info = (modem_info *) tty->driver_data;
1747
1748         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1749                 return;
1750         isdn_tty_shutdown(info);
1751         info->count = 0;
1752         info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1753         info->tty = NULL;
1754         wake_up_interruptible(&info->open_wait);
1755 }
1756
1757 /* This routine initializes all emulator-data.
1758  */
1759 static void
1760 isdn_tty_reset_profile(atemu * m)
1761 {
1762         m->profile[0] = 0;
1763         m->profile[1] = 0;
1764         m->profile[2] = 43;
1765         m->profile[3] = 13;
1766         m->profile[4] = 10;
1767         m->profile[5] = 8;
1768         m->profile[6] = 3;
1769         m->profile[7] = 60;
1770         m->profile[8] = 2;
1771         m->profile[9] = 6;
1772         m->profile[10] = 7;
1773         m->profile[11] = 70;
1774         m->profile[12] = 0x45;
1775         m->profile[13] = 4;
1776         m->profile[14] = ISDN_PROTO_L2_X75I;
1777         m->profile[15] = ISDN_PROTO_L3_TRANS;
1778         m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1779         m->profile[17] = ISDN_MODEM_WINSIZE;
1780         m->profile[18] = 4;
1781         m->profile[19] = 0;
1782         m->profile[20] = 0;
1783         m->profile[23] = 0;
1784         m->pmsn[0] = '\0';
1785         m->plmsn[0] = '\0';
1786 }
1787
1788 #ifdef CONFIG_ISDN_AUDIO
1789 static void
1790 isdn_tty_modem_reset_vpar(atemu * m)
1791 {
1792         m->vpar[0] = 2;         /* Voice-device            (2 = phone line) */
1793         m->vpar[1] = 0;         /* Silence detection level (0 = none      ) */
1794         m->vpar[2] = 70;        /* Silence interval        (7 sec.        ) */
1795         m->vpar[3] = 2;         /* Compression type        (1 = ADPCM-2   ) */
1796         m->vpar[4] = 0;         /* DTMF detection level    (0 = softcode  ) */
1797         m->vpar[5] = 8;         /* DTMF interval           (8 * 5 ms.     ) */
1798 }
1799 #endif
1800
1801 #ifdef CONFIG_ISDN_TTY_FAX
1802 static void
1803 isdn_tty_modem_reset_faxpar(modem_info * info)
1804 {
1805         T30_s *f = info->fax;
1806
1807         f->code = 0;
1808         f->phase = ISDN_FAX_PHASE_IDLE;
1809         f->direction = 0;
1810         f->resolution = 1;      /* fine */
1811         f->rate = 5;            /* 14400 bit/s */
1812         f->width = 0;
1813         f->length = 0;
1814         f->compression = 0;
1815         f->ecm = 0;
1816         f->binary = 0;
1817         f->scantime = 0;
1818         memset(&f->id[0], 32, FAXIDLEN - 1);
1819         f->id[FAXIDLEN - 1] = 0;
1820         f->badlin = 0;
1821         f->badmul = 0;
1822         f->bor = 0;
1823         f->nbc = 0;
1824         f->cq = 0;
1825         f->cr = 0;
1826         f->ctcrty = 0;
1827         f->minsp = 0;
1828         f->phcto = 30;
1829         f->rel = 0;
1830         memset(&f->pollid[0], 32, FAXIDLEN - 1);
1831         f->pollid[FAXIDLEN - 1] = 0;
1832 }
1833 #endif
1834
1835 static void
1836 isdn_tty_modem_reset_regs(modem_info * info, int force)
1837 {
1838         atemu *m = &info->emu;
1839         if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1840                 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1841                 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1842                 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1843                 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1844         }
1845 #ifdef CONFIG_ISDN_AUDIO
1846         isdn_tty_modem_reset_vpar(m);
1847 #endif
1848 #ifdef CONFIG_ISDN_TTY_FAX
1849         isdn_tty_modem_reset_faxpar(info);
1850 #endif
1851         m->mdmcmdl = 0;
1852 }
1853
1854 static void
1855 modem_write_profile(atemu * m)
1856 {
1857         memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1858         memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1859         memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1860         if (dev->profd)
1861                 send_sig(SIGIO, dev->profd, 1);
1862 }
1863
1864 static const struct tty_operations modem_ops = {
1865         .open = isdn_tty_open,
1866         .close = isdn_tty_close,
1867         .write = isdn_tty_write,
1868         .flush_chars = isdn_tty_flush_chars,
1869         .write_room = isdn_tty_write_room,
1870         .chars_in_buffer = isdn_tty_chars_in_buffer,
1871         .flush_buffer = isdn_tty_flush_buffer,
1872         .ioctl = isdn_tty_ioctl,
1873         .throttle = isdn_tty_throttle,
1874         .unthrottle = isdn_tty_unthrottle,
1875         .set_termios = isdn_tty_set_termios,
1876         .hangup = isdn_tty_hangup,
1877         .tiocmget = isdn_tty_tiocmget,
1878         .tiocmset = isdn_tty_tiocmset,
1879 };
1880
1881 int
1882 isdn_tty_modem_init(void)
1883 {
1884         isdn_modem_t    *m;
1885         int             i, retval;
1886         modem_info      *info;
1887
1888         m = &dev->mdm;
1889         m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1890         if (!m->tty_modem)
1891                 return -ENOMEM;
1892         m->tty_modem->name = "ttyI";
1893         m->tty_modem->major = ISDN_TTY_MAJOR;
1894         m->tty_modem->minor_start = 0;
1895         m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1896         m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1897         m->tty_modem->init_termios = tty_std_termios;
1898         m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1899         m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1900         m->tty_modem->driver_name = "isdn_tty";
1901         tty_set_operations(m->tty_modem, &modem_ops);
1902         retval = tty_register_driver(m->tty_modem);
1903         if (retval) {
1904                 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1905                 goto err;
1906         }
1907         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1908                 info = &m->info[i];
1909 #ifdef CONFIG_ISDN_TTY_FAX
1910                 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1911                         printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1912                         retval = -ENOMEM;
1913                         goto err_unregister;
1914                 }
1915 #endif
1916 #ifdef MODULE
1917                 info->owner = THIS_MODULE;
1918 #endif
1919                 spin_lock_init(&info->readlock);
1920                 init_MUTEX(&info->write_sem);
1921                 sprintf(info->last_cause, "0000");
1922                 sprintf(info->last_num, "none");
1923                 info->last_dir = 0;
1924                 info->last_lhup = 1;
1925                 info->last_l2 = -1;
1926                 info->last_si = 0;
1927                 isdn_tty_reset_profile(&info->emu);
1928                 isdn_tty_modem_reset_regs(info, 1);
1929                 info->magic = ISDN_ASYNC_MAGIC;
1930                 info->line = i;
1931                 info->tty = NULL;
1932                 info->x_char = 0;
1933                 info->count = 0;
1934                 info->blocked_open = 0;
1935                 init_waitqueue_head(&info->open_wait);
1936                 init_waitqueue_head(&info->close_wait);
1937                 info->isdn_driver = -1;
1938                 info->isdn_channel = -1;
1939                 info->drv_index = -1;
1940                 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1941                 init_timer(&info->nc_timer);
1942                 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1943                 info->nc_timer.data = (unsigned long) info;
1944                 skb_queue_head_init(&info->xmit_queue);
1945 #ifdef CONFIG_ISDN_AUDIO
1946                 skb_queue_head_init(&info->dtmf_queue);
1947 #endif
1948                 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1949                         printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1950                         retval = -ENOMEM;
1951                         goto err_unregister;
1952                 }
1953                 /* Make room for T.70 header */
1954                 info->xmit_buf += 4;
1955         }
1956         return 0;
1957 err_unregister:
1958         for (i--; i >= 0; i--) {
1959                 info = &m->info[i];
1960 #ifdef CONFIG_ISDN_TTY_FAX
1961                 kfree(info->fax);
1962 #endif
1963                 kfree(info->xmit_buf - 4);
1964         }
1965         tty_unregister_driver(m->tty_modem);
1966  err:
1967         put_tty_driver(m->tty_modem);
1968         m->tty_modem = NULL;
1969         return retval;
1970 }
1971
1972 void
1973 isdn_tty_exit(void)
1974 {
1975         modem_info *info;
1976         int i;
1977
1978         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1979                 info = &dev->mdm.info[i];
1980                 isdn_tty_cleanup_xmit(info);
1981 #ifdef CONFIG_ISDN_TTY_FAX
1982                 kfree(info->fax);
1983 #endif
1984                 kfree(info->xmit_buf - 4);
1985         }
1986         tty_unregister_driver(dev->mdm.tty_modem);
1987         put_tty_driver(dev->mdm.tty_modem);
1988         dev->mdm.tty_modem = NULL;
1989 }
1990
1991
1992 /*
1993  * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1994  *      match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1995  *      and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1996  */
1997
1998 static int
1999 isdn_tty_match_icall(char *cid, atemu *emu, int di)
2000 {
2001 #ifdef ISDN_DEBUG_MODEM_ICALL
2002         printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
2003                emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
2004                emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
2005 #endif
2006         if (strlen(emu->lmsn)) {
2007                 char *p = emu->lmsn;
2008                 char *q;
2009                 int  tmp;
2010                 int  ret = 0;
2011
2012                 while (1) {
2013                         if ((q = strchr(p, ';')))
2014                                 *q = '\0';
2015                         if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2016                                 ret = tmp;
2017 #ifdef ISDN_DEBUG_MODEM_ICALL
2018                         printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2019                                p, isdn_map_eaz2msn(emu->msn, di), tmp);
2020 #endif
2021                         if (q) {
2022                                 *q = ';';
2023                                 p = q;
2024                                 p++;
2025                         }
2026                         if (!tmp)
2027                                 return 0;
2028                         if (!q)
2029                                 break;
2030                 }
2031                 return ret;
2032         } else {
2033                 int tmp;
2034                 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2035 #ifdef ISDN_DEBUG_MODEM_ICALL
2036                         printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2037                                isdn_map_eaz2msn(emu->msn, di), tmp);
2038 #endif
2039                 return tmp;
2040         }
2041 }
2042
2043 /*
2044  * An incoming call-request has arrived.
2045  * Search the tty-devices for an appropriate device and bind
2046  * it to the ISDN-Channel.
2047  * Return:
2048  *
2049  *  0 = No matching device found.
2050  *  1 = A matching device found.
2051  *  3 = No match found, but eventually would match, if
2052  *      CID is longer.
2053  */
2054 int
2055 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2056 {
2057         char *eaz;
2058         int i;
2059         int wret;
2060         int idx;
2061         int si1;
2062         int si2;
2063         char *nr;
2064         ulong flags;
2065
2066         if (!setup->phone[0]) {
2067                 nr = "0";
2068                 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2069         } else
2070                 nr = setup->phone;
2071         si1 = (int) setup->si1;
2072         si2 = (int) setup->si2;
2073         if (!setup->eazmsn[0]) {
2074                 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2075                 eaz = "0";
2076         } else
2077                 eaz = setup->eazmsn;
2078 #ifdef ISDN_DEBUG_MODEM_ICALL
2079         printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2080 #endif
2081         wret = 0;
2082         spin_lock_irqsave(&dev->lock, flags);
2083         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2084                 modem_info *info = &dev->mdm.info[i];
2085
2086                 if (info->count == 0)
2087                     continue;
2088                 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) &&  /* SI1 is matching */
2089                     (info->emu.mdmreg[REG_SI2] == si2)) {         /* SI2 is matching */
2090                         idx = isdn_dc2minor(di, ch);
2091 #ifdef ISDN_DEBUG_MODEM_ICALL
2092                         printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2093                         printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2094                                info->flags, info->isdn_driver, info->isdn_channel,
2095                                dev->usage[idx]);
2096 #endif
2097                         if (
2098 #ifndef FIX_FILE_TRANSFER
2099                                 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2100 #endif
2101                                 (info->isdn_driver == -1) &&
2102                                 (info->isdn_channel == -1) &&
2103                                 (USG_NONE(dev->usage[idx]))) {
2104                                 int matchret;
2105
2106                                 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2107                                         wret = matchret;
2108                                 if (!matchret) {                  /* EAZ is matching */
2109                                         info->isdn_driver = di;
2110                                         info->isdn_channel = ch;
2111                                         info->drv_index = idx;
2112                                         dev->m_idx[idx] = info->line;
2113                                         dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2114                                         dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2115                                         strcpy(dev->num[idx], nr);
2116                                         strcpy(info->emu.cpn, eaz);
2117                                         info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2118                                         info->emu.mdmreg[REG_PLAN] = setup->plan;
2119                                         info->emu.mdmreg[REG_SCREEN] = setup->screen;
2120                                         isdn_info_update();
2121                                         spin_unlock_irqrestore(&dev->lock, flags);
2122                                         printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2123                                                info->line);
2124                                         info->msr |= UART_MSR_RI;
2125                                         isdn_tty_modem_result(RESULT_RING, info);
2126                                         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2127                                         return 1;
2128                                 }
2129                         }
2130                 }
2131         }
2132         spin_unlock_irqrestore(&dev->lock, flags);
2133         printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2134                ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2135         return (wret == 2)?3:0;
2136 }
2137
2138 #define TTY_IS_ACTIVE(info) \
2139         (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2140
2141 int
2142 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2143 {
2144         int mi;
2145         modem_info *info;
2146         char *e;
2147
2148         if (i < 0)
2149                 return 0;
2150         if ((mi = dev->m_idx[i]) >= 0) {
2151                 info = &dev->mdm.info[mi];
2152                 switch (c->command) {
2153                         case ISDN_STAT_CINF:
2154                                 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2155                                 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2156                                 if (e == (char *)c->parm.num)
2157                                         info->emu.charge = 0;
2158
2159                                 break;
2160                         case ISDN_STAT_BSENT:
2161 #ifdef ISDN_TTY_STAT_DEBUG
2162                                 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2163 #endif
2164                                 if ((info->isdn_driver == c->driver) &&
2165                                     (info->isdn_channel == c->arg)) {
2166                                         info->msr |= UART_MSR_CTS;
2167                                         if (info->send_outstanding)
2168                                                 if (!(--info->send_outstanding))
2169                                                         info->lsr |= UART_LSR_TEMT;
2170                                         isdn_tty_tint(info);
2171                                         return 1;
2172                                 }
2173                                 break;
2174                         case ISDN_STAT_CAUSE:
2175 #ifdef ISDN_TTY_STAT_DEBUG
2176                                 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2177 #endif
2178                                 /* Signal cause to tty-device */
2179                                 strncpy(info->last_cause, c->parm.num, 5);
2180                                 return 1;
2181                         case ISDN_STAT_DISPLAY:
2182 #ifdef ISDN_TTY_STAT_DEBUG
2183                                 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2184 #endif
2185                                 /* Signal display to tty-device */
2186                                 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2187                                         !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2188                                   isdn_tty_at_cout("\r\n", info);
2189                                   isdn_tty_at_cout("DISPLAY: ", info);
2190                                   isdn_tty_at_cout(c->parm.display, info);
2191                                   isdn_tty_at_cout("\r\n", info);
2192                                 }
2193                                 return 1;
2194                         case ISDN_STAT_DCONN:
2195 #ifdef ISDN_TTY_STAT_DEBUG
2196                                 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2197 #endif
2198                                 if (TTY_IS_ACTIVE(info)) {
2199                                         if (info->dialing == 1) {
2200                                                 info->dialing = 2;
2201                                                 return 1;
2202                                         }
2203                                 }
2204                                 break;
2205                         case ISDN_STAT_DHUP:
2206 #ifdef ISDN_TTY_STAT_DEBUG
2207                                 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2208 #endif
2209                                 if (TTY_IS_ACTIVE(info)) {
2210                                         if (info->dialing == 1)
2211                                                 isdn_tty_modem_result(RESULT_BUSY, info);
2212                                         if (info->dialing > 1)
2213                                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2214                                         info->dialing = 0;
2215 #ifdef ISDN_DEBUG_MODEM_HUP
2216                                         printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2217 #endif
2218                                         isdn_tty_modem_hup(info, 0);
2219                                         return 1;
2220                                 }
2221                                 break;
2222                         case ISDN_STAT_BCONN:
2223 #ifdef ISDN_TTY_STAT_DEBUG
2224                                 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2225 #endif
2226                                 /* Wake up any processes waiting
2227                                  * for incoming call of this device when
2228                                  * DCD follow the state of incoming carrier
2229                                  */
2230                                 if (info->blocked_open &&
2231                                    (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2232                                         wake_up_interruptible(&info->open_wait);
2233                                 }
2234
2235                                 /* Schedule CONNECT-Message to any tty
2236                                  * waiting for it and
2237                                  * set DCD-bit of its modem-status.
2238                                  */
2239                                 if (TTY_IS_ACTIVE(info) ||
2240                                     (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2241                                         info->msr |= UART_MSR_DCD;
2242                                         info->emu.charge = 0;
2243                                         if (info->dialing & 0xf)
2244                                                 info->last_dir = 1;
2245                                         else
2246                                                 info->last_dir = 0;
2247                                         info->dialing = 0;
2248                                         info->rcvsched = 1;
2249                                         if (USG_MODEM(dev->usage[i])) {
2250                                                 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2251                                                         strcpy(info->emu.connmsg, c->parm.num);
2252                                                         isdn_tty_modem_result(RESULT_CONNECT, info);
2253                                                 } else
2254                                                         isdn_tty_modem_result(RESULT_CONNECT64000, info);
2255                                         }
2256                                         if (USG_VOICE(dev->usage[i]))
2257                                                 isdn_tty_modem_result(RESULT_VCON, info);
2258                                         return 1;
2259                                 }
2260                                 break;
2261                         case ISDN_STAT_BHUP:
2262 #ifdef ISDN_TTY_STAT_DEBUG
2263                                 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2264 #endif
2265                                 if (TTY_IS_ACTIVE(info)) {
2266 #ifdef ISDN_DEBUG_MODEM_HUP
2267                                         printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2268 #endif
2269                                         isdn_tty_modem_hup(info, 0);
2270                                         return 1;
2271                                 }
2272                                 break;
2273                         case ISDN_STAT_NODCH:
2274 #ifdef ISDN_TTY_STAT_DEBUG
2275                                 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2276 #endif
2277                                 if (TTY_IS_ACTIVE(info)) {
2278                                         if (info->dialing) {
2279                                                 info->dialing = 0;
2280                                                 info->last_l2 = -1;
2281                                                 info->last_si = 0;
2282                                                 sprintf(info->last_cause, "0000");
2283                                                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2284                                         }
2285                                         isdn_tty_modem_hup(info, 0);
2286                                         return 1;
2287                                 }
2288                                 break;
2289                         case ISDN_STAT_UNLOAD:
2290 #ifdef ISDN_TTY_STAT_DEBUG
2291                                 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2292 #endif
2293                                 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2294                                         info = &dev->mdm.info[i];
2295                                         if (info->isdn_driver == c->driver) {
2296                                                 if (info->online)
2297                                                         isdn_tty_modem_hup(info, 1);
2298                                         }
2299                                 }
2300                                 return 1;
2301 #ifdef CONFIG_ISDN_TTY_FAX
2302                         case ISDN_STAT_FAXIND:
2303                                 if (TTY_IS_ACTIVE(info)) {
2304                                         isdn_tty_fax_command(info, c);
2305                                 }
2306                                 break;
2307 #endif
2308 #ifdef CONFIG_ISDN_AUDIO
2309                         case ISDN_STAT_AUDIO:
2310                                 if (TTY_IS_ACTIVE(info)) {
2311                                         switch(c->parm.num[0]) {
2312                                                 case ISDN_AUDIO_DTMF:
2313                                                         if (info->vonline) {
2314                                                                 isdn_audio_put_dle_code(info,
2315                                                                         c->parm.num[1]);
2316                                                         }
2317                                                         break;
2318                                         }
2319                                 }
2320                                 break;
2321 #endif
2322                 }
2323         }
2324         return 0;
2325 }
2326
2327 /*********************************************************************
2328  Modem-Emulator-Routines
2329  *********************************************************************/
2330
2331 #define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2332
2333 /*
2334  * Put a message from the AT-emulator into receive-buffer of tty,
2335  * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2336  */
2337 void
2338 isdn_tty_at_cout(char *msg, modem_info * info)
2339 {
2340         struct tty_struct *tty;
2341         atemu *m = &info->emu;
2342         char *p;
2343         char c;
2344         u_long flags;
2345         struct sk_buff *skb = NULL;
2346         char *sp = NULL;
2347         int l;
2348
2349         if (!msg) {
2350                 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2351                 return;
2352         }
2353
2354         l = strlen(msg);
2355
2356         spin_lock_irqsave(&info->readlock, flags);
2357         tty = info->tty;
2358         if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2359                 spin_unlock_irqrestore(&info->readlock, flags);
2360                 return;
2361         }
2362
2363         /* use queue instead of direct, if online and */
2364         /* data is in queue or buffer is full */
2365         if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2366             !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2367                 skb = alloc_skb(l, GFP_ATOMIC);
2368                 if (!skb) {
2369                         spin_unlock_irqrestore(&info->readlock, flags);
2370                         return;
2371                 }
2372                 sp = skb_put(skb, l);
2373 #ifdef CONFIG_ISDN_AUDIO
2374                 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2375                 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2376 #endif
2377         }
2378
2379         for (p = msg; *p; p++) {
2380                 switch (*p) {
2381                         case '\r':
2382                                 c = m->mdmreg[REG_CR];
2383                                 break;
2384                         case '\n':
2385                                 c = m->mdmreg[REG_LF];
2386                                 break;
2387                         case '\b':
2388                                 c = m->mdmreg[REG_BS];
2389                                 break;
2390                         default:
2391                                 c = *p;
2392                 }
2393                 if (skb) {
2394                         *sp++ = c;
2395                 } else {
2396                         if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
2397                                 break;
2398                 }
2399         }
2400         if (skb) {
2401                 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2402                 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2403                 spin_unlock_irqrestore(&info->readlock, flags);
2404                 /* Schedule dequeuing */
2405                 if (dev->modempoll && info->rcvsched)
2406                         isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2407
2408         } else {
2409                 spin_unlock_irqrestore(&info->readlock, flags);
2410                 tty_flip_buffer_push(tty);
2411         }
2412 }
2413
2414 /*
2415  * Perform ATH Hangup
2416  */
2417 static void
2418 isdn_tty_on_hook(modem_info * info)
2419 {
2420         if (info->isdn_channel >= 0) {
2421 #ifdef ISDN_DEBUG_MODEM_HUP
2422                 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2423 #endif
2424                 isdn_tty_modem_hup(info, 1);
2425         }
2426 }
2427
2428 static void
2429 isdn_tty_off_hook(void)
2430 {
2431         printk(KERN_DEBUG "isdn_tty_off_hook\n");
2432 }
2433
2434 #define PLUSWAIT1 (HZ/2)        /* 0.5 sec. */
2435 #define PLUSWAIT2 (HZ*3/2)      /* 1.5 sec */
2436
2437 /*
2438  * Check Buffer for Modem-escape-sequence, activate timer-callback to
2439  * isdn_tty_modem_escape() if sequence found.
2440  *
2441  * Parameters:
2442  *   p          pointer to databuffer
2443  *   plus       escape-character
2444  *   count      length of buffer
2445  *   pluscount  count of valid escape-characters so far
2446  *   lastplus   timestamp of last character
2447  */
2448 static void
2449 isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2450                    u_long *lastplus)
2451 {
2452         if (plus > 127)
2453                 return;
2454         if (count > 3) {
2455                 p += count - 3;
2456                 count = 3;
2457                 *pluscount = 0;
2458         }
2459         while (count > 0) {
2460                 if (*(p++) == plus) {
2461                         if ((*pluscount)++) {
2462                                 /* Time since last '+' > 0.5 sec. ? */
2463                                 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2464                                         *pluscount = 1;
2465                         } else {
2466                                 /* Time since last non-'+' < 1.5 sec. ? */
2467                                 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2468                                         *pluscount = 0;
2469                         }
2470                         if ((*pluscount == 3) && (count == 1))
2471                                 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2472                         if (*pluscount > 3)
2473                                 *pluscount = 1;
2474                 } else
2475                         *pluscount = 0;
2476                 *lastplus = jiffies;
2477                 count--;
2478         }
2479 }
2480
2481 /*
2482  * Return result of AT-emulator to tty-receive-buffer, depending on
2483  * modem-register 12, bit 0 and 1.
2484  * For CONNECT-messages also switch to online-mode.
2485  * For RING-message handle auto-ATA if register 0 != 0
2486  */
2487
2488 static void
2489 isdn_tty_modem_result(int code, modem_info * info)
2490 {
2491         atemu *m = &info->emu;
2492         static char *msg[] =
2493         {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2494          "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2495          "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2496         char s[ISDN_MSNLEN+10];
2497
2498         switch (code) {
2499                 case RESULT_RING:
2500                         m->mdmreg[REG_RINGCNT]++;
2501                         if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2502                                 /* Automatically accept incoming call */
2503                                 isdn_tty_cmd_ATA(info);
2504                         break;
2505                 case RESULT_NO_CARRIER:
2506 #ifdef ISDN_DEBUG_MODEM_HUP
2507                         printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2508                                (info->flags & ISDN_ASYNC_CLOSING),
2509                                (!info->tty));
2510 #endif
2511                         m->mdmreg[REG_RINGCNT] = 0;
2512                         del_timer(&info->nc_timer);
2513                         info->ncarrier = 0;
2514                         if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2515                                 return;
2516                         }
2517 #ifdef CONFIG_ISDN_AUDIO
2518                         if (info->vonline & 1) {
2519 #ifdef ISDN_DEBUG_MODEM_VOICE
2520                                 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2521                                        info->line);
2522 #endif
2523                                 /* voice-recording, add DLE-ETX */
2524                                 isdn_tty_at_cout("\020\003", info);
2525                         }
2526                         if (info->vonline & 2) {
2527 #ifdef ISDN_DEBUG_MODEM_VOICE
2528                                 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2529                                        info->line);
2530 #endif
2531                                 /* voice-playing, add DLE-DC4 */
2532                                 isdn_tty_at_cout("\020\024", info);
2533                         }
2534 #endif
2535                         break;
2536                 case RESULT_CONNECT:
2537                 case RESULT_CONNECT64000:
2538                         sprintf(info->last_cause, "0000");
2539                         if (!info->online)
2540                                 info->online = 2;
2541                         break;
2542                 case RESULT_VCON:
2543 #ifdef ISDN_DEBUG_MODEM_VOICE
2544                         printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2545                                info->line);
2546 #endif
2547                         sprintf(info->last_cause, "0000");
2548                         if (!info->online)
2549                                 info->online = 1;
2550                         break;
2551         } /* switch(code) */
2552
2553         if (m->mdmreg[REG_RESP] & BIT_RESP) {
2554                 /* Show results */
2555                 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2556                         /* Show numeric results only */
2557                         sprintf(s, "\r\n%d\r\n", code);
2558                         isdn_tty_at_cout(s, info);
2559                 } else {
2560                         if (code == RESULT_RING) {
2561                             /* return if "show RUNG" and ringcounter>1 */
2562                             if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2563                                     (m->mdmreg[REG_RINGCNT] > 1))
2564                                                 return;
2565                             /* print CID, _before_ _every_ ring */
2566                             if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2567                                     isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2568                                     isdn_tty_at_cout(dev->num[info->drv_index], info);
2569                                     if (m->mdmreg[REG_CDN] & BIT_CDN) {
2570                                             isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2571                                             isdn_tty_at_cout(info->emu.cpn, info);
2572                                     }
2573                             }
2574                         }
2575                         isdn_tty_at_cout("\r\n", info);
2576                         isdn_tty_at_cout(msg[code], info);
2577                         switch (code) {
2578                                 case RESULT_CONNECT:
2579                                         switch (m->mdmreg[REG_L2PROT]) {
2580                                                 case ISDN_PROTO_L2_MODEM:
2581                                                         isdn_tty_at_cout(" ", info);
2582                                                         isdn_tty_at_cout(m->connmsg, info);
2583                                                         break;
2584                                         }
2585                                         break;
2586                                 case RESULT_RING:
2587                                         /* Append CPN, if enabled */
2588                                         if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2589                                                 sprintf(s, "/%s", m->cpn);
2590                                                 isdn_tty_at_cout(s, info);
2591                                         }
2592                                         /* Print CID only once, _after_ 1st RING */
2593                                         if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2594                                             (m->mdmreg[REG_RINGCNT] == 1)) {
2595                                                 isdn_tty_at_cout("\r\n", info);
2596                                                 isdn_tty_at_cout("CALLER NUMBER: ", info);
2597                                                 isdn_tty_at_cout(dev->num[info->drv_index], info);
2598                                                 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2599                                                         isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2600                                                         isdn_tty_at_cout(info->emu.cpn, info);
2601                                                 }
2602                                         }
2603                                         break;
2604                                 case RESULT_NO_CARRIER:
2605                                 case RESULT_NO_DIALTONE:
2606                                 case RESULT_BUSY:
2607                                 case RESULT_NO_ANSWER:
2608                                         m->mdmreg[REG_RINGCNT] = 0;
2609                                         /* Append Cause-Message if enabled */
2610                                         if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2611                                                 sprintf(s, "/%s", info->last_cause);
2612                                                 isdn_tty_at_cout(s, info);
2613                                         }
2614                                         break;
2615                                 case RESULT_CONNECT64000:
2616                                         /* Append Protocol to CONNECT message */
2617                                         switch (m->mdmreg[REG_L2PROT]) {
2618                                                 case ISDN_PROTO_L2_X75I:
2619                                                 case ISDN_PROTO_L2_X75UI:
2620                                                 case ISDN_PROTO_L2_X75BUI:
2621                                                         isdn_tty_at_cout("/X.75", info);
2622                                                         break;
2623                                                 case ISDN_PROTO_L2_HDLC:
2624                                                         isdn_tty_at_cout("/HDLC", info);
2625                                                         break;
2626                                                 case ISDN_PROTO_L2_V11096:
2627                                                         isdn_tty_at_cout("/V110/9600", info);
2628                                                         break;
2629                                                 case ISDN_PROTO_L2_V11019:
2630                                                         isdn_tty_at_cout("/V110/19200", info);
2631                                                         break;
2632                                                 case ISDN_PROTO_L2_V11038:
2633                                                         isdn_tty_at_cout("/V110/38400", info);
2634                                                         break;
2635                                         }
2636                                         if (m->mdmreg[REG_T70] & BIT_T70) {
2637                                                 isdn_tty_at_cout("/T.70", info);
2638                                                 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2639                                                         isdn_tty_at_cout("+", info);
2640                                         }
2641                                         break;
2642                         }
2643                         isdn_tty_at_cout("\r\n", info);
2644                 }
2645         }
2646         if (code == RESULT_NO_CARRIER) {
2647                 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2648                         return;
2649                 }
2650 #ifdef CONFIG_ISDN_AUDIO
2651                 if ( !info->vonline )
2652                         tty_ldisc_flush(info->tty);
2653 #else
2654                 tty_ldisc_flush(info->tty);
2655 #endif
2656                 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2657                     (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2658                        (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2659                         tty_hangup(info->tty);
2660                 }
2661         }
2662 }
2663
2664
2665 /*
2666  * Display a modem-register-value.
2667  */
2668 static void
2669 isdn_tty_show_profile(int ridx, modem_info * info)
2670 {
2671         char v[6];
2672
2673         sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2674         isdn_tty_at_cout(v, info);
2675 }
2676
2677 /*
2678  * Get MSN-string from char-pointer, set pointer to end of number
2679  */
2680 static void
2681 isdn_tty_get_msnstr(char *n, char **p)
2682 {
2683         int limit = ISDN_MSNLEN - 1;
2684
2685         while (((*p[0] >= '0' && *p[0] <= '9') ||
2686                 /* Why a comma ??? */
2687                 (*p[0] == ',') || (*p[0] == ':')) &&
2688                 (limit--))
2689                 *n++ = *p[0]++;
2690         *n = '\0';
2691 }
2692
2693 /*
2694  * Get phone-number from modem-commandbuffer
2695  */
2696 static void
2697 isdn_tty_getdial(char *p, char *q,int cnt)
2698 {
2699         int first = 1;
2700         int limit = ISDN_MSNLEN - 1;    /* MUST match the size of interface var to avoid
2701                                         buffer overflow */
2702
2703         while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) {
2704                 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2705                     ((*p == 'R') && first) ||
2706                     (*p == '*') || (*p == '#')) {
2707                         *q++ = *p;
2708                         limit--;
2709                 }
2710                 if(!limit)
2711                         break;
2712                 p++;
2713                 first = 0;
2714         }
2715         *q = 0;
2716 }
2717
2718 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2719 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2720
2721 static void
2722 isdn_tty_report(modem_info * info)
2723 {
2724         atemu *m = &info->emu;
2725         char s[80];
2726
2727         isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2728         sprintf(s, "    Remote Number:    %s\r\n", info->last_num);
2729         isdn_tty_at_cout(s, info);
2730         sprintf(s, "    Direction:        %s\r\n", info->last_dir ? "outgoing" : "incoming");
2731         isdn_tty_at_cout(s, info);
2732         isdn_tty_at_cout("    Layer-2 Protocol: ", info);
2733         switch (info->last_l2) {
2734                 case ISDN_PROTO_L2_X75I:
2735                         isdn_tty_at_cout("X.75i", info);
2736                         break;
2737                 case ISDN_PROTO_L2_X75UI:
2738                         isdn_tty_at_cout("X.75ui", info);
2739                         break;
2740                 case ISDN_PROTO_L2_X75BUI:
2741                         isdn_tty_at_cout("X.75bui", info);
2742                         break;
2743                 case ISDN_PROTO_L2_HDLC:
2744                         isdn_tty_at_cout("HDLC", info);
2745                         break;
2746                 case ISDN_PROTO_L2_V11096:
2747                         isdn_tty_at_cout("V.110 9600 Baud", info);
2748                         break;
2749                 case ISDN_PROTO_L2_V11019:
2750                         isdn_tty_at_cout("V.110 19200 Baud", info);
2751                         break;
2752                 case ISDN_PROTO_L2_V11038:
2753                         isdn_tty_at_cout("V.110 38400 Baud", info);
2754                         break;
2755                 case ISDN_PROTO_L2_TRANS:
2756                         isdn_tty_at_cout("transparent", info);
2757                         break;
2758                 case ISDN_PROTO_L2_MODEM:
2759                         isdn_tty_at_cout("modem", info);
2760                         break;
2761                 case ISDN_PROTO_L2_FAX:
2762                         isdn_tty_at_cout("fax", info);
2763                         break;
2764                 default:
2765                         isdn_tty_at_cout("unknown", info);
2766                         break;
2767         }
2768         if (m->mdmreg[REG_T70] & BIT_T70) {
2769                 isdn_tty_at_cout("/T.70", info);
2770                 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2771                         isdn_tty_at_cout("+", info);
2772         }
2773         isdn_tty_at_cout("\r\n", info);
2774         isdn_tty_at_cout("    Service:          ", info);
2775         switch (info->last_si) {
2776                 case 1:
2777                         isdn_tty_at_cout("audio\r\n", info);
2778                         break;
2779                 case 5:
2780                         isdn_tty_at_cout("btx\r\n", info);
2781                         break;
2782                 case 7:
2783                         isdn_tty_at_cout("data\r\n", info);
2784                         break;
2785                 default:
2786                         sprintf(s, "%d\r\n", info->last_si);
2787                         isdn_tty_at_cout(s, info);
2788                         break;
2789         }
2790         sprintf(s, "    Hangup location:  %s\r\n", info->last_lhup ? "local" : "remote");
2791         isdn_tty_at_cout(s, info);
2792         sprintf(s, "    Last cause:       %s\r\n", info->last_cause);
2793         isdn_tty_at_cout(s, info);
2794 }
2795
2796 /*
2797  * Parse AT&.. commands.
2798  */
2799 static int
2800 isdn_tty_cmd_ATand(char **p, modem_info * info)
2801 {
2802         atemu *m = &info->emu;
2803         int i;
2804         char rb[100];
2805
2806 #define MAXRB (sizeof(rb) - 1)
2807
2808         switch (*p[0]) {
2809                 case 'B':
2810                         /* &B - Set Buffersize */
2811                         p[0]++;
2812                         i = isdn_getnum(p);
2813                         if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2814                                 PARSE_ERROR1;
2815 #ifdef CONFIG_ISDN_AUDIO
2816                         if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2817                                 PARSE_ERROR1;
2818 #endif
2819                         m->mdmreg[REG_PSIZE] = i / 16;
2820                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2821                         switch (m->mdmreg[REG_L2PROT]) {
2822                                 case ISDN_PROTO_L2_V11096:
2823                                 case ISDN_PROTO_L2_V11019:
2824                                 case ISDN_PROTO_L2_V11038:
2825                                         info->xmit_size /= 10;
2826                         }
2827                         break;
2828                 case 'C':
2829                         /* &C - DCD Status */
2830                         p[0]++;
2831                         switch (isdn_getnum(p)) {
2832                                 case 0:
2833                                         m->mdmreg[REG_DCD] &= ~BIT_DCD;
2834                                         break;
2835                                 case 1:
2836                                         m->mdmreg[REG_DCD] |= BIT_DCD;
2837                                         break;
2838                                 default:
2839                                         PARSE_ERROR1
2840                         }
2841                         break;
2842                 case 'D':
2843                         /* &D - Set DTR-Low-behavior */
2844                         p[0]++;
2845                         switch (isdn_getnum(p)) {
2846                                 case 0:
2847                                         m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2848                                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2849                                         break;
2850                                 case 2:
2851                                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2852                                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2853                                         break;
2854                                 case 3:
2855                                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2856                                         m->mdmreg[REG_DTRR] |= BIT_DTRR;
2857                                         break;
2858                                 default:
2859                                         PARSE_ERROR1
2860                         }
2861                         break;
2862                 case 'E':
2863                         /* &E -Set EAZ/MSN */
2864                         p[0]++;
2865                         isdn_tty_get_msnstr(m->msn, p);
2866                         break;
2867                 case 'F':
2868                         /* &F -Set Factory-Defaults */
2869                         p[0]++;
2870                         if (info->msr & UART_MSR_DCD)
2871                                 PARSE_ERROR1;
2872                         isdn_tty_reset_profile(m);
2873                         isdn_tty_modem_reset_regs(info, 1);
2874                         break;
2875 #ifdef DUMMY_HAYES_AT
2876                 case 'K':
2877                         /* only for be compilant with common scripts */
2878                         /* &K Flowcontrol - no function */
2879                         p[0]++;
2880                         isdn_getnum(p);
2881                         break;
2882 #endif
2883                 case 'L':
2884                         /* &L -Set Numbers to listen on */
2885                         p[0]++;
2886                         i = 0;
2887                         while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2888                                (i < ISDN_LMSNLEN - 1))
2889                                 m->lmsn[i++] = *p[0]++;
2890                         m->lmsn[i] = '\0';
2891                         break;
2892                 case 'R':
2893                         /* &R - Set V.110 bitrate adaption */
2894                         p[0]++;
2895                         i = isdn_getnum(p);
2896                         switch (i) {
2897                                 case 0:
2898                                         /* Switch off V.110, back to X.75 */
2899                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2900                                         m->mdmreg[REG_SI2] = 0;
2901                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2902                                         break;
2903                                 case 9600:
2904                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2905                                         m->mdmreg[REG_SI2] = 197;
2906                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2907                                         break;
2908                                 case 19200:
2909                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2910                                         m->mdmreg[REG_SI2] = 199;
2911                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2912                                         break;
2913                                 case 38400:
2914                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2915                                         m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2916                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2917                                         break;
2918                                 default:
2919                                         PARSE_ERROR1;
2920                         }
2921                         /* Switch off T.70 */
2922                         m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2923                         /* Set Service 7 */
2924                         m->mdmreg[REG_SI1] |= 4;
2925                         break;
2926                 case 'S':
2927                         /* &S - Set Windowsize */
2928                         p[0]++;
2929                         i = isdn_getnum(p);
2930                         if ((i > 0) && (i < 9))
2931                                 m->mdmreg[REG_WSIZE] = i;
2932                         else
2933                                 PARSE_ERROR1;
2934                         break;
2935                 case 'V':
2936                         /* &V - Show registers */
2937                         p[0]++;
2938                         isdn_tty_at_cout("\r\n", info);
2939                         for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2940                                 sprintf(rb, "S%02d=%03d%s", i,
2941                                         m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2942                                 isdn_tty_at_cout(rb, info);
2943                         }
2944                         sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2945                                 strlen(m->msn) ? m->msn : "None");
2946                         isdn_tty_at_cout(rb, info);
2947                         if (strlen(m->lmsn)) {
2948                                 isdn_tty_at_cout("\r\nListen: ", info);
2949                                 isdn_tty_at_cout(m->lmsn, info);
2950                                 isdn_tty_at_cout("\r\n", info);
2951                         }
2952                         break;
2953                 case 'W':
2954                         /* &W - Write Profile */
2955                         p[0]++;
2956                         switch (*p[0]) {
2957                                 case '0':
2958                                         p[0]++;
2959                                         modem_write_profile(m);
2960                                         break;
2961                                 default:
2962                                         PARSE_ERROR1;
2963                         }
2964                         break;
2965                 case 'X':
2966                         /* &X - Switch to BTX-Mode and T.70 */
2967                         p[0]++;
2968                         switch (isdn_getnum(p)) {
2969                                 case 0:
2970                                         m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2971                                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2972                                         break;
2973                                 case 1:
2974                                         m->mdmreg[REG_T70] |= BIT_T70;
2975                                         m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2976                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2977                                         info->xmit_size = 112;
2978                                         m->mdmreg[REG_SI1] = 4;
2979                                         m->mdmreg[REG_SI2] = 0;
2980                                         break;
2981                                 case 2:
2982                                         m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2983                                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2984                                         info->xmit_size = 112;
2985                                         m->mdmreg[REG_SI1] = 4;
2986                                         m->mdmreg[REG_SI2] = 0;
2987                                         break;
2988                                 default:
2989                                         PARSE_ERROR1;
2990                         }
2991                         break;
2992                 default:
2993                         PARSE_ERROR1;
2994         }
2995         return 0;
2996 }
2997
2998 static int
2999 isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
3000 {
3001         /* Some plausibility checks */
3002         switch (mreg) {
3003                 case REG_L2PROT:
3004                         if (mval > ISDN_PROTO_L2_MAX)
3005                                 return 1;
3006                         break;
3007                 case REG_PSIZE:
3008                         if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
3009                                 return 1;
3010 #ifdef CONFIG_ISDN_AUDIO
3011                         if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
3012                                 return 1;
3013 #endif
3014                         info->xmit_size = mval * 16;
3015                         switch (m->mdmreg[REG_L2PROT]) {
3016                                 case ISDN_PROTO_L2_V11096:
3017                                 case ISDN_PROTO_L2_V11019:
3018                                 case ISDN_PROTO_L2_V11038:
3019                                         info->xmit_size /= 10;
3020                         }
3021                         break;
3022                 case REG_SI1I:
3023                 case REG_PLAN:
3024                 case REG_SCREEN:
3025                         /* readonly registers */
3026                         return 1;
3027         }
3028         return 0;
3029 }
3030
3031 /*
3032  * Perform ATS command
3033  */
3034 static int
3035 isdn_tty_cmd_ATS(char **p, modem_info * info)
3036 {
3037         atemu *m = &info->emu;
3038         int bitpos;
3039         int mreg;
3040         int mval;
3041         int bval;
3042
3043         mreg = isdn_getnum(p);
3044         if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3045                 PARSE_ERROR1;
3046         switch (*p[0]) {
3047                 case '=':
3048                         p[0]++;
3049                         mval = isdn_getnum(p);
3050                         if (mval < 0 || mval > 255)
3051                                 PARSE_ERROR1;
3052                         if (isdn_tty_check_ats(mreg, mval, info, m))
3053                                 PARSE_ERROR1;
3054                         m->mdmreg[mreg] = mval;
3055                         break;
3056                 case '.':
3057                         /* Set/Clear a single bit */
3058                         p[0]++;
3059                         bitpos = isdn_getnum(p);
3060                         if ((bitpos < 0) || (bitpos > 7))
3061                                 PARSE_ERROR1;
3062                         switch (*p[0]) {
3063                                 case '=':
3064                                         p[0]++;
3065                                         bval = isdn_getnum(p);
3066                                         if (bval < 0 || bval > 1)
3067                                                 PARSE_ERROR1;
3068                                         if (bval)
3069                                                 mval = m->mdmreg[mreg] | (1 << bitpos);
3070                                         else
3071                                                 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3072                                         if (isdn_tty_check_ats(mreg, mval, info, m))
3073                                                 PARSE_ERROR1;
3074                                         m->mdmreg[mreg] = mval;
3075                                         break;
3076                                 case '?':
3077                                         p[0]++;
3078                                         isdn_tty_at_cout("\r\n", info);
3079                                         isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3080                                                          info);
3081                                         break;
3082                                 default:
3083                                         PARSE_ERROR1;
3084                         }
3085                         break;
3086                 case '?':
3087                         p[0]++;
3088                         isdn_tty_show_profile(mreg, info);
3089                         break;
3090                 default:
3091                         PARSE_ERROR1;
3092                         break;
3093         }
3094         return 0;
3095 }
3096
3097 /*
3098  * Perform ATA command
3099  */
3100 static void
3101 isdn_tty_cmd_ATA(modem_info * info)
3102 {
3103         atemu *m = &info->emu;
3104         isdn_ctrl cmd;
3105         int l2;
3106
3107         if (info->msr & UART_MSR_RI) {
3108                 /* Accept incoming call */
3109                 info->last_dir = 0;
3110                 strcpy(info->last_num, dev->num[info->drv_index]);
3111                 m->mdmreg[REG_RINGCNT] = 0;
3112                 info->msr &= ~UART_MSR_RI;
3113                 l2 = m->mdmreg[REG_L2PROT];
3114 #ifdef CONFIG_ISDN_AUDIO
3115                 /* If more than one bit set in reg18, autoselect Layer2 */
3116                 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3117                         if (m->mdmreg[REG_SI1I] == 1) {
3118                                 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3119                                         l2 = ISDN_PROTO_L2_TRANS;
3120                         } else
3121                                 l2 = ISDN_PROTO_L2_X75I;
3122                 }
3123 #endif
3124                 cmd.driver = info->isdn_driver;
3125                 cmd.command = ISDN_CMD_SETL2;
3126                 cmd.arg = info->isdn_channel + (l2 << 8);
3127                 info->last_l2 = l2;
3128                 isdn_command(&cmd);
3129                 cmd.driver = info->isdn_driver;
3130                 cmd.command = ISDN_CMD_SETL3;
3131                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3132 #ifdef CONFIG_ISDN_TTY_FAX
3133                 if (l2 == ISDN_PROTO_L2_FAX) {
3134                         cmd.parm.fax = info->fax;
3135                         info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3136                 }
3137 #endif
3138                 isdn_command(&cmd);
3139                 cmd.driver = info->isdn_driver;
3140                 cmd.arg = info->isdn_channel;
3141                 cmd.command = ISDN_CMD_ACCEPTD;
3142                 info->dialing = 16;
3143                 info->emu.carrierwait = 0;
3144                 isdn_command(&cmd);
3145                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3146         } else
3147                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3148 }
3149
3150 #ifdef CONFIG_ISDN_AUDIO
3151 /*
3152  * Parse AT+F.. commands
3153  */
3154 static int
3155 isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3156 {
3157         atemu *m = &info->emu;
3158         char rs[20];
3159
3160         if (!strncmp(p[0], "CLASS", 5)) {
3161                 p[0] += 5;
3162                 switch (*p[0]) {
3163                         case '?':
3164                                 p[0]++;
3165                                 sprintf(rs, "\r\n%d",
3166                                         (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3167 #ifdef CONFIG_ISDN_TTY_FAX
3168                                 if (TTY_IS_FCLASS2(info))
3169                                                 sprintf(rs, "\r\n2");
3170                                 else if (TTY_IS_FCLASS1(info))
3171                                                 sprintf(rs, "\r\n1");
3172 #endif
3173                                 isdn_tty_at_cout(rs, info);
3174                                 break;
3175                         case '=':
3176                                 p[0]++;
3177                                 switch (*p[0]) {
3178                                         case '0':
3179                                                 p[0]++;
3180                                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3181                                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3182                                                 m->mdmreg[REG_SI1] = 4;
3183                                                 info->xmit_size =
3184                                                     m->mdmreg[REG_PSIZE] * 16;
3185                                                 break;
3186 #ifdef CONFIG_ISDN_TTY_FAX
3187                                         case '1':
3188                                                 p[0]++;
3189                                                 if (!(dev->global_features &
3190                                                         ISDN_FEATURE_L3_FCLASS1))
3191                                                         PARSE_ERROR1;
3192                                                 m->mdmreg[REG_SI1] = 1;
3193                                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3194                                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3195                                                 info->xmit_size =
3196                                                     m->mdmreg[REG_PSIZE] * 16;
3197                                                 break;
3198                                         case '2':
3199                                                 p[0]++;
3200                                                 if (!(dev->global_features &
3201                                                         ISDN_FEATURE_L3_FCLASS2))
3202                                                         PARSE_ERROR1;
3203                                                 m->mdmreg[REG_SI1] = 1;
3204                                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3205                                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3206                                                 info->xmit_size =
3207                                                     m->mdmreg[REG_PSIZE] * 16;
3208                                                 break;
3209 #endif
3210                                         case '8':
3211                                                 p[0]++;
3212                                                 /* L2 will change on dialout with si=1 */
3213                                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3214                                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3215                                                 m->mdmreg[REG_SI1] = 5;
3216                                                 info->xmit_size = VBUF;
3217                                                 break;
3218                                         case '?':
3219                                                 p[0]++;
3220                                                 strcpy(rs, "\r\n0,");
3221 #ifdef CONFIG_ISDN_TTY_FAX
3222                                                 if (dev->global_features &
3223                                                         ISDN_FEATURE_L3_FCLASS1)
3224                                                         strcat(rs, "1,");
3225                                                 if (dev->global_features &
3226                                                         ISDN_FEATURE_L3_FCLASS2)
3227                                                         strcat(rs, "2,");
3228 #endif
3229                                                 strcat(rs, "8");
3230                                                 isdn_tty_at_cout(rs, info);
3231                                                 break;
3232                                         default:
3233                                                 PARSE_ERROR1;
3234                                 }
3235                                 break;
3236                         default:
3237                                 PARSE_ERROR1;
3238                 }
3239                 return 0;
3240         }
3241 #ifdef CONFIG_ISDN_TTY_FAX
3242         return (isdn_tty_cmd_PLUSF_FAX(p, info));
3243 #else
3244         PARSE_ERROR1;
3245 #endif
3246 }
3247
3248 /*
3249  * Parse AT+V.. commands
3250  */
3251 static int
3252 isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3253 {
3254         atemu *m = &info->emu;
3255         isdn_ctrl cmd;
3256         static char *vcmd[] =
3257         {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3258         int i;
3259         int par1;
3260         int par2;
3261         char rs[20];
3262
3263         i = 0;
3264         while (vcmd[i]) {
3265                 if (!strncmp(vcmd[i], p[0], 2)) {
3266                         p[0] += 2;
3267                         break;
3268                 }
3269                 i++;
3270         }
3271         switch (i) {
3272                 case 0:
3273                         /* AT+VNH - Auto hangup feature */
3274                         switch (*p[0]) {
3275                                 case '?':
3276                                         p[0]++;
3277                                         isdn_tty_at_cout("\r\n1", info);
3278                                         break;
3279                                 case '=':
3280                                         p[0]++;
3281                                         switch (*p[0]) {
3282                                                 case '1':
3283                                                         p[0]++;
3284                                                         break;
3285                                                 case '?':
3286                                                         p[0]++;
3287                                                         isdn_tty_at_cout("\r\n1", info);
3288                                                         break;
3289                                                 default:
3290                                                         PARSE_ERROR1;
3291                                         }
3292                                         break;
3293                                 default:
3294                                         PARSE_ERROR1;
3295                         }
3296                         break;
3297                 case 1:
3298                         /* AT+VIP - Reset all voice parameters */
3299                         isdn_tty_modem_reset_vpar(m);
3300                         break;
3301                 case 2:
3302                         /* AT+VLS - Select device, accept incoming call */
3303                         switch (*p[0]) {
3304                                 case '?':
3305                                         p[0]++;
3306                                         sprintf(rs, "\r\n%d", m->vpar[0]);
3307                                         isdn_tty_at_cout(rs, info);
3308                                         break;
3309                                 case '=':
3310                                         p[0]++;
3311                                         switch (*p[0]) {
3312                                                 case '0':
3313                                                         p[0]++;
3314                                                         m->vpar[0] = 0;
3315                                                         break;
3316                                                 case '2':
3317                                                         p[0]++;
3318                                                         m->vpar[0] = 2;
3319                                                         break;
3320                                                 case '?':
3321                                                         p[0]++;
3322                                                         isdn_tty_at_cout("\r\n0,2", info);
3323                                                         break;
3324                                                 default:
3325                                                         PARSE_ERROR1;
3326                                         }
3327                                         break;
3328                                 default:
3329                                         PARSE_ERROR1;
3330                         }
3331                         break;
3332                 case 3:
3333                         /* AT+VRX - Start recording */
3334                         if (!m->vpar[0])
3335                                 PARSE_ERROR1;
3336                         if (info->online != 1) {
3337                                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3338                                 return 1;
3339                         }
3340                         info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3341                         if (!info->dtmf_state) {
3342                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3343                                 PARSE_ERROR1;
3344                         }
3345                         info->silence_state = isdn_audio_silence_init(info->silence_state);
3346                         if (!info->silence_state) {
3347                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3348                                 PARSE_ERROR1;
3349                         }
3350                         if (m->vpar[3] < 5) {
3351                                 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3352                                 if (!info->adpcmr) {
3353                                         printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3354                                         PARSE_ERROR1;
3355                                 }
3356                         }
3357 #ifdef ISDN_DEBUG_AT
3358                         printk(KERN_DEBUG "AT: +VRX\n");
3359 #endif
3360                         info->vonline |= 1;
3361                         isdn_tty_modem_result(RESULT_CONNECT, info);
3362                         return 0;
3363                         break;
3364                 case 4:
3365                         /* AT+VSD - Silence detection */
3366                         switch (*p[0]) {
3367                                 case '?':
3368                                         p[0]++;
3369                                         sprintf(rs, "\r\n<%d>,<%d>",
3370                                                 m->vpar[1],
3371                                                 m->vpar[2]);
3372                                         isdn_tty_at_cout(rs, info);
3373                                         break;
3374                                 case '=':
3375                                         p[0]++;
3376                                         if ((*p[0]>='0') && (*p[0]<='9')) {
3377                                                 par1 = isdn_getnum(p);
3378                                                 if ((par1 < 0) || (par1 > 31))
3379                                                         PARSE_ERROR1;
3380                                                 if (*p[0] != ',')
3381                                                         PARSE_ERROR1;
3382                                                 p[0]++;
3383                                                 par2 = isdn_getnum(p);
3384                                                 if ((par2 < 0) || (par2 > 255))
3385                                                         PARSE_ERROR1;
3386                                                 m->vpar[1] = par1;
3387                                                 m->vpar[2] = par2;
3388                                                 break;
3389                                         } else
3390                                         if (*p[0] == '?') {
3391                                                 p[0]++;
3392                                                 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3393                                                            info);
3394                                                 break;
3395                                         } else
3396                                         PARSE_ERROR1;
3397                                         break;
3398                                 default:
3399                                         PARSE_ERROR1;
3400                         }
3401                         break;
3402                 case 5:
3403                         /* AT+VSM - Select compression */
3404                         switch (*p[0]) {
3405                                 case '?':
3406                                         p[0]++;
3407                                         sprintf(rs, "\r\n<%d>,<%d><8000>",
3408                                                 m->vpar[3],
3409                                                 m->vpar[1]);
3410                                         isdn_tty_at_cout(rs, info);
3411                                         break;
3412                                 case '=':
3413                                         p[0]++;
3414                                         switch (*p[0]) {
3415                                                 case '2':
3416                                                 case '3':
3417                                                 case '4':
3418                                                 case '5':
3419                                                 case '6':
3420                                                         par1 = isdn_getnum(p);
3421                                                         if ((par1 < 2) || (par1 > 6))
3422                                                                 PARSE_ERROR1;
3423                                                         m->vpar[3] = par1;
3424                                                         break;
3425                                                 case '?':
3426                                                         p[0]++;
3427                                                         isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3428                                                                    info);
3429                                                         isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3430                                                                    info);
3431                                                         isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3432                                                                    info);
3433                                                         isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3434                                                                    info);
3435                                                         isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3436                                                                    info);
3437                                                         break;
3438                                                 default:
3439                                                         PARSE_ERROR1;
3440                                         }
3441                                         break;
3442                                 default:
3443                                         PARSE_ERROR1;
3444                         }
3445                         break;
3446                 case 6:
3447                         /* AT+VTX - Start sending */
3448                         if (!m->vpar[0])
3449                                 PARSE_ERROR1;
3450                         if (info->online != 1) {
3451                                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3452                                 return 1;
3453                         }
3454                         info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3455                         if (!info->dtmf_state) {
3456                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3457                                 PARSE_ERROR1;
3458                         }
3459                         if (m->vpar[3] < 5) {
3460                                 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3461                                 if (!info->adpcms) {
3462                                         printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3463                                         PARSE_ERROR1;
3464                                 }
3465                         }
3466 #ifdef ISDN_DEBUG_AT
3467                         printk(KERN_DEBUG "AT: +VTX\n");
3468 #endif
3469                         m->lastDLE = 0;
3470                         info->vonline |= 2;
3471                         isdn_tty_modem_result(RESULT_CONNECT, info);
3472                         return 0;
3473                         break;
3474                 case 7:
3475                         /* AT+VDD - DTMF detection */
3476                         switch (*p[0]) {
3477                                 case '?':
3478                                         p[0]++;
3479                                         sprintf(rs, "\r\n<%d>,<%d>",
3480                                                 m->vpar[4],
3481                                                 m->vpar[5]);
3482                                         isdn_tty_at_cout(rs, info);
3483                                         break;
3484                                 case '=':
3485                                         p[0]++;
3486                                         if ((*p[0]>='0') && (*p[0]<='9')) {
3487                                                 if (info->online != 1)
3488                                                         PARSE_ERROR1;
3489                                                 par1 = isdn_getnum(p);
3490                                                 if ((par1 < 0) || (par1 > 15))
3491                                                         PARSE_ERROR1;
3492                                                 if (*p[0] != ',')
3493                                                         PARSE_ERROR1;
3494                                                 p[0]++;
3495                                                 par2 = isdn_getnum(p);
3496                                                 if ((par2 < 0) || (par2 > 255))
3497                                                         PARSE_ERROR1;
3498                                                 m->vpar[4] = par1;
3499                                                 m->vpar[5] = par2;
3500                                                 cmd.driver = info->isdn_driver;
3501                                                 cmd.command = ISDN_CMD_AUDIO;
3502                                                 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3503                                                 cmd.parm.num[0] = par1;
3504                                                 cmd.parm.num[1] = par2;
3505                                                 isdn_command(&cmd);
3506                                                 break;
3507                                         } else
3508                                         if (*p[0] == '?') {
3509                                                 p[0]++;
3510                                                 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3511                                                         info);
3512                                                 break;
3513                                         } else
3514                                         PARSE_ERROR1;
3515                                         break;
3516                                 default:
3517                                         PARSE_ERROR1;
3518                         }
3519                         break;
3520                 default:
3521                         PARSE_ERROR1;
3522         }
3523         return 0;
3524 }
3525 #endif                          /* CONFIG_ISDN_AUDIO */
3526
3527 /*
3528  * Parse and perform an AT-command-line.
3529  */
3530 static void
3531 isdn_tty_parse_at(modem_info * info)
3532 {
3533         atemu *m = &info->emu;
3534         char *p;
3535         char ds[40];
3536
3537 #ifdef ISDN_DEBUG_AT
3538         printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3539 #endif
3540         for (p = &m->mdmcmd[2]; *p;) {
3541                 switch (*p) {
3542                         case ' ':
3543                                 p++;
3544                                 break;
3545                         case 'A':
3546                                 /* A - Accept incoming call */
3547                                 p++;
3548                                 isdn_tty_cmd_ATA(info);
3549                                 return;
3550                                 break;
3551                         case 'D':
3552                                 /* D - Dial */
3553                                 if (info->msr & UART_MSR_DCD)
3554                                         PARSE_ERROR;
3555                                 if (info->msr & UART_MSR_RI) {
3556                                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3557                                         return;
3558                                 }
3559                                 isdn_tty_getdial(++p, ds, sizeof ds);
3560                                 p += strlen(p);
3561                                 if (!strlen(m->msn))
3562                                         isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3563                                 else if (strlen(ds))
3564                                         isdn_tty_dial(ds, info, m);
3565                                 else
3566                                         PARSE_ERROR;
3567                                 return;
3568                         case 'E':
3569                                 /* E - Turn Echo on/off */
3570                                 p++;
3571                                 switch (isdn_getnum(&p)) {
3572                                         case 0:
3573                                                 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3574                                                 break;
3575                                         case 1:
3576                                                 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3577                                                 break;
3578                                         default:
3579                                                 PARSE_ERROR;
3580                                 }
3581                                 break;
3582                         case 'H':
3583                                 /* H - On/Off-hook */
3584                                 p++;
3585                                 switch (*p) {
3586                                         case '0':
3587                                                 p++;
3588                                                 isdn_tty_on_hook(info);
3589                                                 break;
3590                                         case '1':
3591                                                 p++;
3592                                                 isdn_tty_off_hook();
3593                                                 break;
3594                                         default:
3595                                                 isdn_tty_on_hook(info);
3596                                                 break;
3597                                 }
3598                                 break;
3599                         case 'I':
3600                                 /* I - Information */
3601                                 p++;
3602                                 isdn_tty_at_cout("\r\nLinux ISDN", info);
3603                                 switch (*p) {
3604                                         case '0':
3605                                         case '1':
3606                                                 p++;
3607                                                 break;
3608                                         case '2':
3609                                                 p++;
3610                                                 isdn_tty_report(info);
3611                                                 break;
3612                                         case '3':
3613                                                 p++;
3614                                                 sprintf(ds, "\r\n%d", info->emu.charge);
3615                                                 isdn_tty_at_cout(ds, info);
3616                                                 break;
3617                                         default:;
3618                                 }
3619                                 break;
3620 #ifdef DUMMY_HAYES_AT
3621                         case 'L':
3622                         case 'M':
3623                                 /* only for be compilant with common scripts */
3624                                 /* no function */
3625                                 p++;
3626                                 isdn_getnum(&p);
3627                                 break;
3628 #endif
3629                         case 'O':
3630                                 /* O - Go online */
3631                                 p++;
3632                                 if (info->msr & UART_MSR_DCD)
3633                                         /* if B-Channel is up */
3634                                         isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3635                                 else
3636                                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3637                                 return;
3638                         case 'Q':
3639                                 /* Q - Turn Emulator messages on/off */
3640                                 p++;
3641                                 switch (isdn_getnum(&p)) {
3642                                         case 0:
3643                                                 m->mdmreg[REG_RESP] |= BIT_RESP;
3644                                                 break;
3645                                         case 1:
3646                                                 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3647                                                 break;
3648                                         default:
3649                                                 PARSE_ERROR;
3650                                 }
3651                                 break;
3652                         case 'S':
3653                                 /* S - Set/Get Register */
3654                                 p++;
3655                                 if (isdn_tty_cmd_ATS(&p, info))
3656                                         return;
3657                                 break;
3658                         case 'V':
3659                                 /* V - Numeric or ASCII Emulator-messages */
3660                                 p++;
3661                                 switch (isdn_getnum(&p)) {
3662                                         case 0:
3663                                                 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3664                                                 break;
3665                                         case 1:
3666                                                 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3667                                                 break;
3668                                         default:
3669                                                 PARSE_ERROR;
3670                                 }
3671                                 break;
3672                         case 'Z':
3673                                 /* Z - Load Registers from Profile */
3674                                 p++;
3675                                 if (info->msr & UART_MSR_DCD) {
3676                                         info->online = 0;
3677                                         isdn_tty_on_hook(info);
3678                                 }
3679                                 isdn_tty_modem_reset_regs(info, 1);
3680                                 break;
3681                         case '+':
3682                                 p++;
3683                                 switch (*p) {
3684 #ifdef CONFIG_ISDN_AUDIO
3685                                         case 'F':
3686                                                 p++;
3687                                                 if (isdn_tty_cmd_PLUSF(&p, info))
3688                                                         return;
3689                                                 break;
3690                                         case 'V':
3691                                                 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3692                                                         (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3693                                                         PARSE_ERROR;
3694                                                 p++;
3695                                                 if (isdn_tty_cmd_PLUSV(&p, info))
3696                                                         return;
3697                                                 break;
3698 #endif                          /* CONFIG_ISDN_AUDIO */
3699                                         case 'S':       /* SUSPEND */
3700                                                 p++;
3701                                                 isdn_tty_get_msnstr(ds, &p);
3702                                                 isdn_tty_suspend(ds, info, m);
3703                                                 break;
3704                                         case 'R':       /* RESUME */
3705                                                 p++;
3706                                                 isdn_tty_get_msnstr(ds, &p);
3707                                                 isdn_tty_resume(ds, info, m);
3708                                                 break;
3709                                         case 'M':       /* MESSAGE */
3710                                                 p++;
3711                                                 isdn_tty_send_msg(info, m, p);
3712                                                 break;
3713                                         default:
3714                                                 PARSE_ERROR;
3715                                 }
3716                                 break;
3717                         case '&':
3718                                 p++;
3719                                 if (isdn_tty_cmd_ATand(&p, info))
3720                                         return;
3721                                 break;
3722                         default:
3723                                 PARSE_ERROR;
3724                 }
3725         }
3726 #ifdef CONFIG_ISDN_AUDIO
3727         if (!info->vonline)
3728 #endif
3729                 isdn_tty_modem_result(RESULT_OK, info);
3730 }
3731
3732 /* Need own toupper() because standard-toupper is not available
3733  * within modules.
3734  */
3735 #define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3736
3737 /*
3738  * Perform line-editing of AT-commands
3739  *
3740  * Parameters:
3741  *   p        inputbuffer
3742  *   count    length of buffer
3743  *   channel  index to line (minor-device)
3744  */
3745 static int
3746 isdn_tty_edit_at(const char *p, int count, modem_info * info)
3747 {
3748         atemu *m = &info->emu;
3749         int total = 0;
3750         u_char c;
3751         char eb[2];
3752         int cnt;
3753
3754         for (cnt = count; cnt > 0; p++, cnt--) {
3755                 c = *p;
3756                 total++;
3757                 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3758                         /* Separator (CR or LF) */
3759                         m->mdmcmd[m->mdmcmdl] = 0;
3760                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3761                                 eb[0] = c;
3762                                 eb[1] = 0;
3763                                 isdn_tty_at_cout(eb, info);
3764                         }
3765                         if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3766                                 isdn_tty_parse_at(info);
3767                         m->mdmcmdl = 0;
3768                         continue;
3769                 }
3770                 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3771                         /* Backspace-Function */
3772                         if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3773                                 if (m->mdmcmdl)
3774                                         m->mdmcmdl--;
3775                                 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3776                                         isdn_tty_at_cout("\b", info);
3777                         }
3778                         continue;
3779                 }
3780                 if (cmdchar(c)) {
3781                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3782                                 eb[0] = c;
3783                                 eb[1] = 0;
3784                                 isdn_tty_at_cout(eb, info);
3785                         }
3786                         if (m->mdmcmdl < 255) {
3787                                 c = my_toupper(c);
3788                                 switch (m->mdmcmdl) {
3789                                         case 1:
3790                                                 if (c == 'T') {
3791                                                         m->mdmcmd[m->mdmcmdl] = c;
3792                                                         m->mdmcmd[++m->mdmcmdl] = 0;
3793                                                         break;
3794                                                 } else
3795                                                         m->mdmcmdl = 0;
3796                                                 /* Fall through, check for 'A' */
3797                                         case 0:
3798                                                 if (c == 'A') {
3799                                                         m->mdmcmd[m->mdmcmdl] = c;
3800                                                         m->mdmcmd[++m->mdmcmdl] = 0;
3801                                                 }
3802                                                 break;
3803                                         default:
3804                                                 m->mdmcmd[m->mdmcmdl] = c;
3805                                                 m->mdmcmd[++m->mdmcmdl] = 0;
3806                                 }
3807                         }
3808                 }
3809         }
3810         return total;
3811 }
3812
3813 /*
3814  * Switch all modem-channels who are online and got a valid
3815  * escape-sequence 1.5 seconds ago, to command-mode.
3816  * This function is called every second via timer-interrupt from within
3817  * timer-dispatcher isdn_timer_function()
3818  */
3819 void
3820 isdn_tty_modem_escape(void)
3821 {
3822         int ton = 0;
3823         int i;
3824         int midx;
3825
3826         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3827                 if (USG_MODEM(dev->usage[i]))
3828                         if ((midx = dev->m_idx[i]) >= 0) {
3829                                 modem_info *info = &dev->mdm.info[midx];
3830                                 if (info->online) {
3831                                         ton = 1;
3832                                         if ((info->emu.pluscount == 3) &&
3833                                             time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3834                                                 info->emu.pluscount = 0;
3835                                                 info->online = 0;
3836                                                 isdn_tty_modem_result(RESULT_OK, info);
3837                                         }
3838                                 }
3839                         }
3840         isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3841 }
3842
3843 /*
3844  * Put a RING-message to all modem-channels who have the RI-bit set.
3845  * This function is called every second via timer-interrupt from within
3846  * timer-dispatcher isdn_timer_function()
3847  */
3848 void
3849 isdn_tty_modem_ring(void)
3850 {
3851         int ton = 0;
3852         int i;
3853
3854         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3855                 modem_info *info = &dev->mdm.info[i];
3856                 if (info->msr & UART_MSR_RI) {
3857                         ton = 1;
3858                         isdn_tty_modem_result(RESULT_RING, info);
3859                 }
3860         }
3861         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3862 }
3863
3864 /*
3865  * For all online tty's, try sending data to
3866  * the lower levels.
3867  */
3868 void
3869 isdn_tty_modem_xmit(void)
3870 {
3871         int ton = 1;
3872         int i;
3873
3874         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3875                 modem_info *info = &dev->mdm.info[i];
3876                 if (info->online) {
3877                         ton = 1;
3878                         isdn_tty_senddown(info);
3879                         isdn_tty_tint(info);
3880                 }
3881         }
3882         isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3883 }
3884
3885 /*
3886  * Check all channels if we have a 'no carrier' timeout.
3887  * Timeout value is set by Register S7.
3888  */
3889 void
3890 isdn_tty_carrier_timeout(void)
3891 {
3892         int ton = 0;
3893         int i;
3894
3895         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3896                 modem_info *info = &dev->mdm.info[i];
3897                 if (info->dialing) {
3898                         if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3899                                 info->dialing = 0;
3900                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3901                                 isdn_tty_modem_hup(info, 1);
3902                         }
3903                         else
3904                                 ton = 1;
3905                 }
3906         }
3907         isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3908 }