drivers/isdn/i4l/isdn_tty.c

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