drivers/isdn/i4l/isdn_tty.c

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