drivers/isdn/i4l/isdn_tty.c

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