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(struct timer_list *t)
 545 {
 546         modem_info *info = from_timer(info, t, nc_timer);
 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         if (!old_termios)
1460                 isdn_tty_change_speed(info);
1461         else {
1462                 if (tty->termios.c_cflag == old_termios->c_cflag &&
1463                     tty->termios.c_ispeed == old_termios->c_ispeed &&
1464                     tty->termios.c_ospeed == old_termios->c_ospeed)
1465                         return;
1466                 isdn_tty_change_speed(info);
1467         }
1468 }
1469
1470 /*
1471  * ------------------------------------------------------------
1472  * isdn_tty_open() and friends
1473  * ------------------------------------------------------------
1474  */
1475
1476 static int isdn_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1477 {
1478         modem_info *info = &dev->mdm.info[tty->index];
1479
1480         if (isdn_tty_paranoia_check(info, tty->name, __func__))
1481                 return -ENODEV;
1482
1483         tty->driver_data = info;
1484
1485         return tty_port_install(&info->port, driver, tty);
1486 }
1487
1488 /*
1489  * This routine is called whenever a serial port is opened.  It
1490  * enables interrupts for a serial port, linking in its async structure into
1491  * the IRQ chain.   It also performs the serial-specific
1492  * initialization for the tty structure.
1493  */
1494 static int
1495 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1496 {
1497         modem_info *info = tty->driver_data;
1498         struct tty_port *port = &info->port;
1499         int retval;
1500
1501 #ifdef ISDN_DEBUG_MODEM_OPEN
1502         printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1503                port->count);
1504 #endif
1505         port->count++;
1506         port->tty = tty;
1507         /*
1508          * Start up serial port
1509          */
1510         retval = isdn_tty_startup(info);
1511         if (retval) {
1512 #ifdef ISDN_DEBUG_MODEM_OPEN
1513                 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1514 #endif
1515                 return retval;
1516         }
1517         retval = tty_port_block_til_ready(port, tty, filp);
1518         if (retval) {
1519 #ifdef ISDN_DEBUG_MODEM_OPEN
1520                 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1521 #endif
1522                 return retval;
1523         }
1524 #ifdef ISDN_DEBUG_MODEM_OPEN
1525         printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1526 #endif
1527         dev->modempoll++;
1528 #ifdef ISDN_DEBUG_MODEM_OPEN
1529         printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1530 #endif
1531         return 0;
1532 }
1533
1534 static void
1535 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1536 {
1537         modem_info *info = (modem_info *) tty->driver_data;
1538         struct tty_port *port = &info->port;
1539         ulong timeout;
1540
1541         if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1542                 return;
1543         if (tty_hung_up_p(filp)) {
1544 #ifdef ISDN_DEBUG_MODEM_OPEN
1545                 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1546 #endif
1547                 return;
1548         }
1549         if ((tty->count == 1) && (port->count != 1)) {
1550                 /*
1551                  * Uh, oh.  tty->count is 1, which means that the tty
1552                  * structure will be freed.  Info->count should always
1553                  * be one in these conditions.  If it's greater than
1554                  * one, we've got real problems, since it means the
1555                  * serial port won't be shutdown.
1556                  */
1557                 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1558                        "info->count is %d\n", port->count);
1559                 port->count = 1;
1560         }
1561         if (--port->count < 0) {
1562                 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1563                        info->line, port->count);
1564                 port->count = 0;
1565         }
1566         if (port->count) {
1567 #ifdef ISDN_DEBUG_MODEM_OPEN
1568                 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1569 #endif
1570                 return;
1571         }
1572         info->closing = 1;
1573
1574         tty->closing = 1;
1575         /*
1576          * At this point we stop accepting input.  To do this, we
1577          * disable the receive line status interrupts, and tell the
1578          * interrupt driver to stop checking the data ready bit in the
1579          * line status register.
1580          */
1581         if (tty_port_initialized(port)) {
1582                 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1583                 /*
1584                  * Before we drop DTR, make sure the UART transmitter
1585                  * has completely drained; this is especially
1586                  * important if there is a transmit FIFO!
1587                  */
1588                 timeout = jiffies + HZ;
1589                 while (!(info->lsr & UART_LSR_TEMT)) {
1590                         schedule_timeout_interruptible(20);
1591                         if (time_after(jiffies, timeout))
1592                                 break;
1593                 }
1594         }
1595         dev->modempoll--;
1596         isdn_tty_shutdown(info);
1597         isdn_tty_flush_buffer(tty);
1598         tty_ldisc_flush(tty);
1599         port->tty = NULL;
1600         info->ncarrier = 0;
1601
1602         tty_port_close_end(port, tty);
1603         info->closing = 0;
1604 #ifdef ISDN_DEBUG_MODEM_OPEN
1605         printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1606 #endif
1607 }
1608
1609 /*
1610  * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1611  */
1612 static void
1613 isdn_tty_hangup(struct tty_struct *tty)
1614 {
1615         modem_info *info = (modem_info *) tty->driver_data;
1616         struct tty_port *port = &info->port;
1617
1618         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1619                 return;
1620         isdn_tty_shutdown(info);
1621         port->count = 0;
1622         tty_port_set_active(port, 0);
1623         port->tty = NULL;
1624         wake_up_interruptible(&port->open_wait);
1625 }
1626
1627 /* This routine initializes all emulator-data.
1628  */
1629 static void
1630 isdn_tty_reset_profile(atemu *m)
1631 {
1632         m->profile[0] = 0;
1633         m->profile[1] = 0;
1634         m->profile[2] = 43;
1635         m->profile[3] = 13;
1636         m->profile[4] = 10;
1637         m->profile[5] = 8;
1638         m->profile[6] = 3;
1639         m->profile[7] = 60;
1640         m->profile[8] = 2;
1641         m->profile[9] = 6;
1642         m->profile[10] = 7;
1643         m->profile[11] = 70;
1644         m->profile[12] = 0x45;
1645         m->profile[13] = 4;
1646         m->profile[14] = ISDN_PROTO_L2_X75I;
1647         m->profile[15] = ISDN_PROTO_L3_TRANS;
1648         m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1649         m->profile[17] = ISDN_MODEM_WINSIZE;
1650         m->profile[18] = 4;
1651         m->profile[19] = 0;
1652         m->profile[20] = 0;
1653         m->profile[23] = 0;
1654         m->pmsn[0] = '\0';
1655         m->plmsn[0] = '\0';
1656 }
1657
1658 #ifdef CONFIG_ISDN_AUDIO
1659 static void
1660 isdn_tty_modem_reset_vpar(atemu *m)
1661 {
1662         m->vpar[0] = 2;         /* Voice-device            (2 = phone line) */
1663         m->vpar[1] = 0;         /* Silence detection level (0 = none      ) */
1664         m->vpar[2] = 70;        /* Silence interval        (7 sec.        ) */
1665         m->vpar[3] = 2;         /* Compression type        (1 = ADPCM-2   ) */
1666         m->vpar[4] = 0;         /* DTMF detection level    (0 = softcode  ) */
1667         m->vpar[5] = 8;         /* DTMF interval           (8 * 5 ms.     ) */
1668 }
1669 #endif
1670
1671 #ifdef CONFIG_ISDN_TTY_FAX
1672 static void
1673 isdn_tty_modem_reset_faxpar(modem_info *info)
1674 {
1675         T30_s *f = info->fax;
1676
1677         f->code = 0;
1678         f->phase = ISDN_FAX_PHASE_IDLE;
1679         f->direction = 0;
1680         f->resolution = 1;      /* fine */
1681         f->rate = 5;            /* 14400 bit/s */
1682         f->width = 0;
1683         f->length = 0;
1684         f->compression = 0;
1685         f->ecm = 0;
1686         f->binary = 0;
1687         f->scantime = 0;
1688         memset(&f->id[0], 32, FAXIDLEN - 1);
1689         f->id[FAXIDLEN - 1] = 0;
1690         f->badlin = 0;
1691         f->badmul = 0;
1692         f->bor = 0;
1693         f->nbc = 0;
1694         f->cq = 0;
1695         f->cr = 0;
1696         f->ctcrty = 0;
1697         f->minsp = 0;
1698         f->phcto = 30;
1699         f->rel = 0;
1700         memset(&f->pollid[0], 32, FAXIDLEN - 1);
1701         f->pollid[FAXIDLEN - 1] = 0;
1702 }
1703 #endif
1704
1705 static void
1706 isdn_tty_modem_reset_regs(modem_info *info, int force)
1707 {
1708         atemu *m = &info->emu;
1709         if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1710                 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1711                 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1712                 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1713                 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1714         }
1715 #ifdef CONFIG_ISDN_AUDIO
1716         isdn_tty_modem_reset_vpar(m);
1717 #endif
1718 #ifdef CONFIG_ISDN_TTY_FAX
1719         isdn_tty_modem_reset_faxpar(info);
1720 #endif
1721         m->mdmcmdl = 0;
1722 }
1723
1724 static void
1725 modem_write_profile(atemu *m)
1726 {
1727         memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1728         memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1729         memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1730         if (dev->profd)
1731                 send_sig(SIGIO, dev->profd, 1);
1732 }
1733
1734 static const struct tty_operations modem_ops = {
1735         .install = isdn_tty_install,
1736         .open = isdn_tty_open,
1737         .close = isdn_tty_close,
1738         .write = isdn_tty_write,
1739         .flush_chars = isdn_tty_flush_chars,
1740         .write_room = isdn_tty_write_room,
1741         .chars_in_buffer = isdn_tty_chars_in_buffer,
1742         .flush_buffer = isdn_tty_flush_buffer,
1743         .ioctl = isdn_tty_ioctl,
1744         .throttle = isdn_tty_throttle,
1745         .unthrottle = isdn_tty_unthrottle,
1746         .set_termios = isdn_tty_set_termios,
1747         .hangup = isdn_tty_hangup,
1748         .tiocmget = isdn_tty_tiocmget,
1749         .tiocmset = isdn_tty_tiocmset,
1750 };
1751
1752 static int isdn_tty_carrier_raised(struct tty_port *port)
1753 {
1754         modem_info *info = container_of(port, modem_info, port);
1755         return info->msr & UART_MSR_DCD;
1756 }
1757
1758 static const struct tty_port_operations isdn_tty_port_ops = {
1759         .carrier_raised = isdn_tty_carrier_raised,
1760 };
1761
1762 int
1763 isdn_tty_modem_init(void)
1764 {
1765         isdn_modem_t    *m;
1766         int             i, retval;
1767         modem_info      *info;
1768
1769         m = &dev->mdm;
1770         m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1771         if (!m->tty_modem)
1772                 return -ENOMEM;
1773         m->tty_modem->name = "ttyI";
1774         m->tty_modem->major = ISDN_TTY_MAJOR;
1775         m->tty_modem->minor_start = 0;
1776         m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1777         m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1778         m->tty_modem->init_termios = tty_std_termios;
1779         m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1780         m->tty_modem->flags = TTY_DRIVER_REAL_RAW;
1781         m->tty_modem->driver_name = "isdn_tty";
1782         tty_set_operations(m->tty_modem, &modem_ops);
1783         retval = tty_register_driver(m->tty_modem);
1784         if (retval) {
1785                 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1786                 goto err;
1787         }
1788         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1789                 info = &m->info[i];
1790 #ifdef CONFIG_ISDN_TTY_FAX
1791                 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1792                         printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1793                         retval = -ENOMEM;
1794                         goto err_unregister;
1795                 }
1796 #endif
1797                 tty_port_init(&info->port);
1798                 info->port.ops = &isdn_tty_port_ops;
1799                 spin_lock_init(&info->readlock);
1800                 sprintf(info->last_cause, "0000");
1801                 sprintf(info->last_num, "none");
1802                 info->last_dir = 0;
1803                 info->last_lhup = 1;
1804                 info->last_l2 = -1;
1805                 info->last_si = 0;
1806                 isdn_tty_reset_profile(&info->emu);
1807                 isdn_tty_modem_reset_regs(info, 1);
1808                 info->magic = ISDN_ASYNC_MAGIC;
1809                 info->line = i;
1810                 info->x_char = 0;
1811                 info->isdn_driver = -1;
1812                 info->isdn_channel = -1;
1813                 info->drv_index = -1;
1814                 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1815                 timer_setup(&info->nc_timer, isdn_tty_modem_do_ncarrier, 0);
1816                 skb_queue_head_init(&info->xmit_queue);
1817 #ifdef CONFIG_ISDN_AUDIO
1818                 skb_queue_head_init(&info->dtmf_queue);
1819 #endif
1820                 info->port.xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5,
1821                                 GFP_KERNEL);
1822                 if (!info->port.xmit_buf) {
1823                         printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1824                         retval = -ENOMEM;
1825                         goto err_unregister;
1826                 }
1827                 /* Make room for T.70 header */
1828                 info->port.xmit_buf += 4;
1829         }
1830         return 0;
1831 err_unregister:
1832         for (i--; i >= 0; i--) {
1833                 info = &m->info[i];
1834 #ifdef CONFIG_ISDN_TTY_FAX
1835                 kfree(info->fax);
1836 #endif
1837                 kfree(info->port.xmit_buf - 4);
1838                 info->port.xmit_buf = NULL;
1839                 tty_port_destroy(&info->port);
1840         }
1841         tty_unregister_driver(m->tty_modem);
1842 err:
1843         put_tty_driver(m->tty_modem);
1844         m->tty_modem = NULL;
1845         return retval;
1846 }
1847
1848 void
1849 isdn_tty_exit(void)
1850 {
1851         modem_info *info;
1852         int i;
1853
1854         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1855                 info = &dev->mdm.info[i];
1856                 isdn_tty_cleanup_xmit(info);
1857 #ifdef CONFIG_ISDN_TTY_FAX
1858                 kfree(info->fax);
1859 #endif
1860                 kfree(info->port.xmit_buf - 4);
1861                 info->port.xmit_buf = NULL;
1862                 tty_port_destroy(&info->port);
1863         }
1864         tty_unregister_driver(dev->mdm.tty_modem);
1865         put_tty_driver(dev->mdm.tty_modem);
1866         dev->mdm.tty_modem = NULL;
1867 }
1868
1869
1870 /*
1871  * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1872  *      match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1873  *      and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1874  */
1875
1876 static int
1877 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1878 {
1879 #ifdef ISDN_DEBUG_MODEM_ICALL
1880         printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1881                emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1882                emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1883 #endif
1884         if (strlen(emu->lmsn)) {
1885                 char *p = emu->lmsn;
1886                 char *q;
1887                 int  tmp;
1888                 int  ret = 0;
1889
1890                 while (1) {
1891                         if ((q = strchr(p, ';')))
1892                                 *q = '\0';
1893                         if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
1894                                 ret = tmp;
1895 #ifdef ISDN_DEBUG_MODEM_ICALL
1896                         printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
1897                                p, isdn_map_eaz2msn(emu->msn, di), tmp);
1898 #endif
1899                         if (q) {
1900                                 *q = ';';
1901                                 p = q;
1902                                 p++;
1903                         }
1904                         if (!tmp)
1905                                 return 0;
1906                         if (!q)
1907                                 break;
1908                 }
1909                 return ret;
1910         } else {
1911                 int tmp;
1912                 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
1913 #ifdef ISDN_DEBUG_MODEM_ICALL
1914                 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
1915                        isdn_map_eaz2msn(emu->msn, di), tmp);
1916 #endif
1917                 return tmp;
1918         }
1919 }
1920
1921 /*
1922  * An incoming call-request has arrived.
1923  * Search the tty-devices for an appropriate device and bind
1924  * it to the ISDN-Channel.
1925  * Return:
1926  *
1927  *  0 = No matching device found.
1928  *  1 = A matching device found.
1929  *  3 = No match found, but eventually would match, if
1930  *      CID is longer.
1931  */
1932 int
1933 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
1934 {
1935         char *eaz;
1936         int i;
1937         int wret;
1938         int idx;
1939         int si1;
1940         int si2;
1941         char *nr;
1942         ulong flags;
1943
1944         if (!setup->phone[0]) {
1945                 nr = "0";
1946                 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
1947         } else
1948                 nr = setup->phone;
1949         si1 = (int) setup->si1;
1950         si2 = (int) setup->si2;
1951         if (!setup->eazmsn[0]) {
1952                 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
1953                 eaz = "0";
1954         } else
1955                 eaz = setup->eazmsn;
1956 #ifdef ISDN_DEBUG_MODEM_ICALL
1957         printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
1958 #endif
1959         wret = 0;
1960         spin_lock_irqsave(&dev->lock, flags);
1961         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1962                 modem_info *info = &dev->mdm.info[i];
1963
1964                 if (info->port.count == 0)
1965                         continue;
1966                 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) &&  /* SI1 is matching */
1967                     (info->emu.mdmreg[REG_SI2] == si2)) {         /* SI2 is matching */
1968                         idx = isdn_dc2minor(di, ch);
1969 #ifdef ISDN_DEBUG_MODEM_ICALL
1970                         printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
1971                         printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
1972                                info->port.flags, info->isdn_driver,
1973                                info->isdn_channel, dev->usage[idx]);
1974 #endif
1975                         if (
1976 #ifndef FIX_FILE_TRANSFER
1977                             tty_port_active(&info->port) &&
1978 #endif
1979                                 (info->isdn_driver == -1) &&
1980                                 (info->isdn_channel == -1) &&
1981                                 (USG_NONE(dev->usage[idx]))) {
1982                                 int matchret;
1983
1984                                 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
1985                                         wret = matchret;
1986                                 if (!matchret) {                  /* EAZ is matching */
1987                                         info->isdn_driver = di;
1988                                         info->isdn_channel = ch;
1989                                         info->drv_index = idx;
1990                                         dev->m_idx[idx] = info->line;
1991                                         dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
1992                                         dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
1993                                         strcpy(dev->num[idx], nr);
1994                                         strcpy(info->emu.cpn, eaz);
1995                                         info->emu.mdmreg[REG_SI1I] = si2bit[si1];
1996                                         info->emu.mdmreg[REG_PLAN] = setup->plan;
1997                                         info->emu.mdmreg[REG_SCREEN] = setup->screen;
1998                                         isdn_info_update();
1999                                         spin_unlock_irqrestore(&dev->lock, flags);
2000                                         printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2001                                                info->line);
2002                                         info->msr |= UART_MSR_RI;
2003                                         isdn_tty_modem_result(RESULT_RING, info);
2004                                         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2005                                         return 1;
2006                                 }
2007                         }
2008                 }
2009         }
2010         spin_unlock_irqrestore(&dev->lock, flags);
2011         printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2012                ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2)) ? "rejected" : "ignored");
2013         return (wret == 2) ? 3 : 0;
2014 }
2015
2016 int
2017 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2018 {
2019         int mi;
2020         modem_info *info;
2021         char *e;
2022
2023         if (i < 0)
2024                 return 0;
2025         if ((mi = dev->m_idx[i]) >= 0) {
2026                 info = &dev->mdm.info[mi];
2027                 switch (c->command) {
2028                 case ISDN_STAT_CINF:
2029                         printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2030                         info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2031                         if (e == (char *)c->parm.num)
2032                                 info->emu.charge = 0;
2033
2034                         break;
2035                 case ISDN_STAT_BSENT:
2036 #ifdef ISDN_TTY_STAT_DEBUG
2037                         printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2038 #endif
2039                         if ((info->isdn_driver == c->driver) &&
2040                             (info->isdn_channel == c->arg)) {
2041                                 info->msr |= UART_MSR_CTS;
2042                                 if (info->send_outstanding)
2043                                         if (!(--info->send_outstanding))
2044                                                 info->lsr |= UART_LSR_TEMT;
2045                                 isdn_tty_tint(info);
2046                                 return 1;
2047                         }
2048                         break;
2049                 case ISDN_STAT_CAUSE:
2050 #ifdef ISDN_TTY_STAT_DEBUG
2051                         printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2052 #endif
2053                         /* Signal cause to tty-device */
2054                         strncpy(info->last_cause, c->parm.num, 5);
2055                         return 1;
2056                 case ISDN_STAT_DISPLAY:
2057 #ifdef ISDN_TTY_STAT_DEBUG
2058                         printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2059 #endif
2060                         /* Signal display to tty-device */
2061                         if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2062                             !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2063                                 isdn_tty_at_cout("\r\n", info);
2064                                 isdn_tty_at_cout("DISPLAY: ", info);
2065                                 isdn_tty_at_cout(c->parm.display, info);
2066                                 isdn_tty_at_cout("\r\n", info);
2067                         }
2068                         return 1;
2069                 case ISDN_STAT_DCONN:
2070 #ifdef ISDN_TTY_STAT_DEBUG
2071                         printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2072 #endif
2073                         if (tty_port_active(&info->port)) {
2074                                 if (info->dialing == 1) {
2075                                         info->dialing = 2;
2076                                         return 1;
2077                                 }
2078                         }
2079                         break;
2080                 case ISDN_STAT_DHUP:
2081 #ifdef ISDN_TTY_STAT_DEBUG
2082                         printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2083 #endif
2084                         if (tty_port_active(&info->port)) {
2085                                 if (info->dialing == 1)
2086                                         isdn_tty_modem_result(RESULT_BUSY, info);
2087                                 if (info->dialing > 1)
2088                                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2089                                 info->dialing = 0;
2090 #ifdef ISDN_DEBUG_MODEM_HUP
2091                                 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2092 #endif
2093                                 isdn_tty_modem_hup(info, 0);
2094                                 return 1;
2095                         }
2096                         break;
2097                 case ISDN_STAT_BCONN:
2098 #ifdef ISDN_TTY_STAT_DEBUG
2099                         printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2100 #endif
2101                         /* Wake up any processes waiting
2102                          * for incoming call of this device when
2103                          * DCD follow the state of incoming carrier
2104                          */
2105                         if (info->port.blocked_open &&
2106                             (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2107                                 wake_up_interruptible(&info->port.open_wait);
2108                         }
2109
2110                         /* Schedule CONNECT-Message to any tty
2111                          * waiting for it and
2112                          * set DCD-bit of its modem-status.
2113                          */
2114                         if (tty_port_active(&info->port) ||
2115                             (info->port.blocked_open &&
2116                              (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2117                                 info->msr |= UART_MSR_DCD;
2118                                 info->emu.charge = 0;
2119                                 if (info->dialing & 0xf)
2120                                         info->last_dir = 1;
2121                                 else
2122                                         info->last_dir = 0;
2123                                 info->dialing = 0;
2124                                 info->rcvsched = 1;
2125                                 if (USG_MODEM(dev->usage[i])) {
2126                                         if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2127                                                 strcpy(info->emu.connmsg, c->parm.num);
2128                                                 isdn_tty_modem_result(RESULT_CONNECT, info);
2129                                         } else
2130                                                 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2131                                 }
2132                                 if (USG_VOICE(dev->usage[i]))
2133                                         isdn_tty_modem_result(RESULT_VCON, info);
2134                                 return 1;
2135                         }
2136                         break;
2137                 case ISDN_STAT_BHUP:
2138 #ifdef ISDN_TTY_STAT_DEBUG
2139                         printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2140 #endif
2141                         if (tty_port_active(&info->port)) {
2142 #ifdef ISDN_DEBUG_MODEM_HUP
2143                                 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2144 #endif
2145                                 isdn_tty_modem_hup(info, 0);
2146                                 return 1;
2147                         }
2148                         break;
2149                 case ISDN_STAT_NODCH:
2150 #ifdef ISDN_TTY_STAT_DEBUG
2151                         printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2152 #endif
2153                         if (tty_port_active(&info->port)) {
2154                                 if (info->dialing) {
2155                                         info->dialing = 0;
2156                                         info->last_l2 = -1;
2157                                         info->last_si = 0;
2158                                         sprintf(info->last_cause, "0000");
2159                                         isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2160                                 }
2161                                 isdn_tty_modem_hup(info, 0);
2162                                 return 1;
2163                         }
2164                         break;
2165                 case ISDN_STAT_UNLOAD:
2166 #ifdef ISDN_TTY_STAT_DEBUG
2167                         printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2168 #endif
2169                         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2170                                 info = &dev->mdm.info[i];
2171                                 if (info->isdn_driver == c->driver) {
2172                                         if (info->online)
2173                                                 isdn_tty_modem_hup(info, 1);
2174                                 }
2175                         }
2176                         return 1;
2177 #ifdef CONFIG_ISDN_TTY_FAX
2178                 case ISDN_STAT_FAXIND:
2179                         if (tty_port_active(&info->port)) {
2180                                 isdn_tty_fax_command(info, c);
2181                         }
2182                         break;
2183 #endif
2184 #ifdef CONFIG_ISDN_AUDIO
2185                 case ISDN_STAT_AUDIO:
2186                         if (tty_port_active(&info->port)) {
2187                                 switch (c->parm.num[0]) {
2188                                 case ISDN_AUDIO_DTMF:
2189                                         if (info->vonline) {
2190                                                 isdn_audio_put_dle_code(info,
2191                                                                         c->parm.num[1]);
2192                                         }
2193                                         break;
2194                                 }
2195                         }
2196                         break;
2197 #endif
2198                 }
2199         }
2200         return 0;
2201 }
2202
2203 /*********************************************************************
2204  Modem-Emulator-Routines
2205 *********************************************************************/
2206
2207 #define cmdchar(c) ((c >= ' ') && (c <= 0x7f))
2208
2209 /*
2210  * Put a message from the AT-emulator into receive-buffer of tty,
2211  * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2212  */
2213 void
2214 isdn_tty_at_cout(char *msg, modem_info *info)
2215 {
2216         struct tty_port *port = &info->port;
2217         atemu *m = &info->emu;
2218         char *p;
2219         char c;
2220         u_long flags;
2221         struct sk_buff *skb = NULL;
2222         char *sp = NULL;
2223         int l;
2224
2225         if (!msg) {
2226                 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2227                 return;
2228         }
2229
2230         l = strlen(msg);
2231
2232         spin_lock_irqsave(&info->readlock, flags);
2233         if (info->closing) {
2234                 spin_unlock_irqrestore(&info->readlock, flags);
2235                 return;
2236         }
2237
2238         /* use queue instead of direct, if online and */
2239         /* data is in queue or buffer is full */
2240         if (info->online && ((tty_buffer_request_room(port, l) < l) ||
2241                              !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2242                 skb = alloc_skb(l, GFP_ATOMIC);
2243                 if (!skb) {
2244                         spin_unlock_irqrestore(&info->readlock, flags);
2245                         return;
2246                 }
2247                 sp = skb_put(skb, l);
2248 #ifdef CONFIG_ISDN_AUDIO
2249                 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2250                 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2251 #endif
2252         }
2253
2254         for (p = msg; *p; p++) {
2255                 switch (*p) {
2256                 case '\r':
2257                         c = m->mdmreg[REG_CR];
2258                         break;
2259                 case '\n':
2260                         c = m->mdmreg[REG_LF];
2261                         break;
2262                 case '\b':
2263                         c = m->mdmreg[REG_BS];
2264                         break;
2265                 default:
2266                         c = *p;
2267                 }
2268                 if (skb) {
2269                         *sp++ = c;
2270                 } else {
2271                         if (tty_insert_flip_char(port, c, TTY_NORMAL) == 0)
2272                                 break;
2273                 }
2274         }
2275         if (skb) {
2276                 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2277                 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2278                 spin_unlock_irqrestore(&info->readlock, flags);
2279                 /* Schedule dequeuing */
2280                 if (dev->modempoll && info->rcvsched)
2281                         isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2282
2283         } else {
2284                 spin_unlock_irqrestore(&info->readlock, flags);
2285                 tty_flip_buffer_push(port);
2286         }
2287 }
2288
2289 /*
2290  * Perform ATH Hangup
2291  */
2292 static void
2293 isdn_tty_on_hook(modem_info *info)
2294 {
2295         if (info->isdn_channel >= 0) {
2296 #ifdef ISDN_DEBUG_MODEM_HUP
2297                 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2298 #endif
2299                 isdn_tty_modem_hup(info, 1);
2300         }
2301 }
2302
2303 static void
2304 isdn_tty_off_hook(void)
2305 {
2306         printk(KERN_DEBUG "isdn_tty_off_hook\n");
2307 }
2308
2309 #define PLUSWAIT1 (HZ / 2)      /* 0.5 sec. */
2310 #define PLUSWAIT2 (HZ * 3 / 2)  /* 1.5 sec */
2311
2312 /*
2313  * Check Buffer for Modem-escape-sequence, activate timer-callback to
2314  * isdn_tty_modem_escape() if sequence found.
2315  *
2316  * Parameters:
2317  *   p          pointer to databuffer
2318  *   plus       escape-character
2319  *   count      length of buffer
2320  *   pluscount  count of valid escape-characters so far
2321  *   lastplus   timestamp of last character
2322  */
2323 static void
2324 isdn_tty_check_esc(const u_char *p, u_char plus, int count, int *pluscount,
2325                    u_long *lastplus)
2326 {
2327         if (plus > 127)
2328                 return;
2329         if (count > 3) {
2330                 p += count - 3;
2331                 count = 3;
2332                 *pluscount = 0;
2333         }
2334         while (count > 0) {
2335                 if (*(p++) == plus) {
2336                         if ((*pluscount)++) {
2337                                 /* Time since last '+' > 0.5 sec. ? */
2338                                 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2339                                         *pluscount = 1;
2340                         } else {
2341                                 /* Time since last non-'+' < 1.5 sec. ? */
2342                                 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2343                                         *pluscount = 0;
2344                         }
2345                         if ((*pluscount == 3) && (count == 1))
2346                                 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2347                         if (*pluscount > 3)
2348                                 *pluscount = 1;
2349                 } else
2350                         *pluscount = 0;
2351                 *lastplus = jiffies;
2352                 count--;
2353         }
2354 }
2355
2356 /*
2357  * Return result of AT-emulator to tty-receive-buffer, depending on
2358  * modem-register 12, bit 0 and 1.
2359  * For CONNECT-messages also switch to online-mode.
2360  * For RING-message handle auto-ATA if register 0 != 0
2361  */
2362
2363 static void
2364 isdn_tty_modem_result(int code, modem_info *info)
2365 {
2366         atemu *m = &info->emu;
2367         static char *msg[] =
2368                 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2369                  "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2370                  "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2371         char s[ISDN_MSNLEN + 10];
2372
2373         switch (code) {
2374         case RESULT_RING:
2375                 m->mdmreg[REG_RINGCNT]++;
2376                 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2377                         /* Automatically accept incoming call */
2378                         isdn_tty_cmd_ATA(info);
2379                 break;
2380         case RESULT_NO_CARRIER:
2381 #ifdef ISDN_DEBUG_MODEM_HUP
2382                 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2383                        info->closing, !info->port.tty);
2384 #endif
2385                 m->mdmreg[REG_RINGCNT] = 0;
2386                 del_timer(&info->nc_timer);
2387                 info->ncarrier = 0;
2388                 if (info->closing || !info->port.tty)
2389                         return;
2390
2391 #ifdef CONFIG_ISDN_AUDIO
2392                 if (info->vonline & 1) {
2393 #ifdef ISDN_DEBUG_MODEM_VOICE
2394                         printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2395                                info->line);
2396 #endif
2397                         /* voice-recording, add DLE-ETX */
2398                         isdn_tty_at_cout("\020\003", info);
2399                 }
2400                 if (info->vonline & 2) {
2401 #ifdef ISDN_DEBUG_MODEM_VOICE
2402                         printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2403                                info->line);
2404 #endif
2405                         /* voice-playing, add DLE-DC4 */
2406                         isdn_tty_at_cout("\020\024", info);
2407                 }
2408 #endif
2409                 break;
2410         case RESULT_CONNECT:
2411         case RESULT_CONNECT64000:
2412                 sprintf(info->last_cause, "0000");
2413                 if (!info->online)
2414                         info->online = 2;
2415                 break;
2416         case RESULT_VCON:
2417 #ifdef ISDN_DEBUG_MODEM_VOICE
2418                 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2419                        info->line);
2420 #endif
2421                 sprintf(info->last_cause, "0000");
2422                 if (!info->online)
2423                         info->online = 1;
2424                 break;
2425         } /* switch (code) */
2426
2427         if (m->mdmreg[REG_RESP] & BIT_RESP) {
2428                 /* Show results */
2429                 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2430                         /* Show numeric results only */
2431                         sprintf(s, "\r\n%d\r\n", code);
2432                         isdn_tty_at_cout(s, info);
2433                 } else {
2434                         if (code == RESULT_RING) {
2435                                 /* return if "show RUNG" and ringcounter>1 */
2436                                 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2437                                     (m->mdmreg[REG_RINGCNT] > 1))
2438                                         return;
2439                                 /* print CID, _before_ _every_ ring */
2440                                 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2441                                         isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2442                                         isdn_tty_at_cout(dev->num[info->drv_index], info);
2443                                         if (m->mdmreg[REG_CDN] & BIT_CDN) {
2444                                                 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2445                                                 isdn_tty_at_cout(info->emu.cpn, info);
2446                                         }
2447                                 }
2448                         }
2449                         isdn_tty_at_cout("\r\n", info);
2450                         isdn_tty_at_cout(msg[code], info);
2451                         switch (code) {
2452                         case RESULT_CONNECT:
2453                                 switch (m->mdmreg[REG_L2PROT]) {
2454                                 case ISDN_PROTO_L2_MODEM:
2455                                         isdn_tty_at_cout(" ", info);
2456                                         isdn_tty_at_cout(m->connmsg, info);
2457                                         break;
2458                                 }
2459                                 break;
2460                         case RESULT_RING:
2461                                 /* Append CPN, if enabled */
2462                                 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2463                                         sprintf(s, "/%s", m->cpn);
2464                                         isdn_tty_at_cout(s, info);
2465                                 }
2466                                 /* Print CID only once, _after_ 1st RING */
2467                                 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2468                                     (m->mdmreg[REG_RINGCNT] == 1)) {
2469                                         isdn_tty_at_cout("\r\n", info);
2470                                         isdn_tty_at_cout("CALLER NUMBER: ", info);
2471                                         isdn_tty_at_cout(dev->num[info->drv_index], info);
2472                                         if (m->mdmreg[REG_CDN] & BIT_CDN) {
2473                                                 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2474                                                 isdn_tty_at_cout(info->emu.cpn, info);
2475                                         }
2476                                 }
2477                                 break;
2478                         case RESULT_NO_CARRIER:
2479                         case RESULT_NO_DIALTONE:
2480                         case RESULT_BUSY:
2481                         case RESULT_NO_ANSWER:
2482                                 m->mdmreg[REG_RINGCNT] = 0;
2483                                 /* Append Cause-Message if enabled */
2484                                 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2485                                         sprintf(s, "/%s", info->last_cause);
2486                                         isdn_tty_at_cout(s, info);
2487                                 }
2488                                 break;
2489                         case RESULT_CONNECT64000:
2490                                 /* Append Protocol to CONNECT message */
2491                                 switch (m->mdmreg[REG_L2PROT]) {
2492                                 case ISDN_PROTO_L2_X75I:
2493                                 case ISDN_PROTO_L2_X75UI:
2494                                 case ISDN_PROTO_L2_X75BUI:
2495                                         isdn_tty_at_cout("/X.75", info);
2496                                         break;
2497                                 case ISDN_PROTO_L2_HDLC:
2498                                         isdn_tty_at_cout("/HDLC", info);
2499                                         break;
2500                                 case ISDN_PROTO_L2_V11096:
2501                                         isdn_tty_at_cout("/V110/9600", info);
2502                                         break;
2503                                 case ISDN_PROTO_L2_V11019:
2504                                         isdn_tty_at_cout("/V110/19200", info);
2505                                         break;
2506                                 case ISDN_PROTO_L2_V11038:
2507                                         isdn_tty_at_cout("/V110/38400", info);
2508                                         break;
2509                                 }
2510                                 if (m->mdmreg[REG_T70] & BIT_T70) {
2511                                         isdn_tty_at_cout("/T.70", info);
2512                                         if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2513                                                 isdn_tty_at_cout("+", info);
2514                                 }
2515                                 break;
2516                         }
2517                         isdn_tty_at_cout("\r\n", info);
2518                 }
2519         }
2520         if (code == RESULT_NO_CARRIER) {
2521                 if (info->closing || (!info->port.tty))
2522                         return;
2523
2524                 if (tty_port_check_carrier(&info->port))
2525                         tty_hangup(info->port.tty);
2526         }
2527 }
2528
2529
2530 /*
2531  * Display a modem-register-value.
2532  */
2533 static void
2534 isdn_tty_show_profile(int ridx, modem_info *info)
2535 {
2536         char v[6];
2537
2538         sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2539         isdn_tty_at_cout(v, info);
2540 }
2541
2542 /*
2543  * Get MSN-string from char-pointer, set pointer to end of number
2544  */
2545 static void
2546 isdn_tty_get_msnstr(char *n, char **p)
2547 {
2548         int limit = ISDN_MSNLEN - 1;
2549
2550         while (((*p[0] >= '0' && *p[0] <= '9') ||
2551                 /* Why a comma ??? */
2552                 (*p[0] == ',') || (*p[0] == ':')) &&
2553                (limit--))
2554                 *n++ = *p[0]++;
2555         *n = '\0';
2556 }
2557
2558 /*
2559  * Get phone-number from modem-commandbuffer
2560  */
2561 static void
2562 isdn_tty_getdial(char *p, char *q, int cnt)
2563 {
2564         int first = 1;
2565         int limit = ISDN_MSNLEN - 1;    /* MUST match the size of interface var to avoid
2566                                            buffer overflow */
2567
2568         while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt > 0) {
2569                 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2570                     ((*p == 'R') && first) ||
2571                     (*p == '*') || (*p == '#')) {
2572                         *q++ = *p;
2573                         limit--;
2574                 }
2575                 if (!limit)
2576                         break;
2577                 p++;
2578                 first = 0;
2579         }
2580         *q = 0;
2581 }
2582
2583 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2584 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2585
2586 static void
2587 isdn_tty_report(modem_info *info)
2588 {
2589         atemu *m = &info->emu;
2590         char s[80];
2591
2592         isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2593         sprintf(s, "    Remote Number:    %s\r\n", info->last_num);
2594         isdn_tty_at_cout(s, info);
2595         sprintf(s, "    Direction:        %s\r\n", info->last_dir ? "outgoing" : "incoming");
2596         isdn_tty_at_cout(s, info);
2597         isdn_tty_at_cout("    Layer-2 Protocol: ", info);
2598         switch (info->last_l2) {
2599         case ISDN_PROTO_L2_X75I:
2600                 isdn_tty_at_cout("X.75i", info);
2601                 break;
2602         case ISDN_PROTO_L2_X75UI:
2603                 isdn_tty_at_cout("X.75ui", info);
2604                 break;
2605         case ISDN_PROTO_L2_X75BUI:
2606                 isdn_tty_at_cout("X.75bui", info);
2607                 break;
2608         case ISDN_PROTO_L2_HDLC:
2609                 isdn_tty_at_cout("HDLC", info);
2610                 break;
2611         case ISDN_PROTO_L2_V11096:
2612                 isdn_tty_at_cout("V.110 9600 Baud", info);
2613                 break;
2614         case ISDN_PROTO_L2_V11019:
2615                 isdn_tty_at_cout("V.110 19200 Baud", info);
2616                 break;
2617         case ISDN_PROTO_L2_V11038:
2618                 isdn_tty_at_cout("V.110 38400 Baud", info);
2619                 break;
2620         case ISDN_PROTO_L2_TRANS:
2621                 isdn_tty_at_cout("transparent", info);
2622                 break;
2623         case ISDN_PROTO_L2_MODEM:
2624                 isdn_tty_at_cout("modem", info);
2625                 break;
2626         case ISDN_PROTO_L2_FAX:
2627                 isdn_tty_at_cout("fax", info);
2628                 break;
2629         default:
2630                 isdn_tty_at_cout("unknown", info);
2631                 break;
2632         }
2633         if (m->mdmreg[REG_T70] & BIT_T70) {
2634                 isdn_tty_at_cout("/T.70", info);
2635                 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2636                         isdn_tty_at_cout("+", info);
2637         }
2638         isdn_tty_at_cout("\r\n", info);
2639         isdn_tty_at_cout("    Service:          ", info);
2640         switch (info->last_si) {
2641         case 1:
2642                 isdn_tty_at_cout("audio\r\n", info);
2643                 break;
2644         case 5:
2645                 isdn_tty_at_cout("btx\r\n", info);
2646                 break;
2647         case 7:
2648                 isdn_tty_at_cout("data\r\n", info);
2649                 break;
2650         default:
2651                 sprintf(s, "%d\r\n", info->last_si);
2652                 isdn_tty_at_cout(s, info);
2653                 break;
2654         }
2655         sprintf(s, "    Hangup location:  %s\r\n", info->last_lhup ? "local" : "remote");
2656         isdn_tty_at_cout(s, info);
2657         sprintf(s, "    Last cause:       %s\r\n", info->last_cause);
2658         isdn_tty_at_cout(s, info);
2659 }
2660
2661 /*
2662  * Parse AT&.. commands.
2663  */
2664 static int
2665 isdn_tty_cmd_ATand(char **p, modem_info *info)
2666 {
2667         atemu *m = &info->emu;
2668         int i;
2669         char rb[100];
2670
2671 #define MAXRB (sizeof(rb) - 1)
2672
2673         switch (*p[0]) {
2674         case 'B':
2675                 /* &B - Set Buffersize */
2676                 p[0]++;
2677                 i = isdn_getnum(p);
2678                 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2679                         PARSE_ERROR1;
2680 #ifdef CONFIG_ISDN_AUDIO
2681                 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2682                         PARSE_ERROR1;
2683 #endif
2684                 m->mdmreg[REG_PSIZE] = i / 16;
2685                 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2686                 switch (m->mdmreg[REG_L2PROT]) {
2687                 case ISDN_PROTO_L2_V11096:
2688                 case ISDN_PROTO_L2_V11019:
2689                 case ISDN_PROTO_L2_V11038:
2690                         info->xmit_size /= 10;
2691                 }
2692                 break;
2693         case 'C':
2694                 /* &C - DCD Status */
2695                 p[0]++;
2696                 switch (isdn_getnum(p)) {
2697                 case 0:
2698                         m->mdmreg[REG_DCD] &= ~BIT_DCD;
2699                         break;
2700                 case 1:
2701                         m->mdmreg[REG_DCD] |= BIT_DCD;
2702                         break;
2703                 default:
2704                         PARSE_ERROR1
2705                                 }
2706                 break;
2707         case 'D':
2708                 /* &D - Set DTR-Low-behavior */
2709                 p[0]++;
2710                 switch (isdn_getnum(p)) {
2711                 case 0:
2712                         m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2713                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2714                         break;
2715                 case 2:
2716                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2717                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2718                         break;
2719                 case 3:
2720                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2721                         m->mdmreg[REG_DTRR] |= BIT_DTRR;
2722                         break;
2723                 default:
2724                         PARSE_ERROR1
2725                                 }
2726                 break;
2727         case 'E':
2728                 /* &E -Set EAZ/MSN */
2729                 p[0]++;
2730                 isdn_tty_get_msnstr(m->msn, p);
2731                 break;
2732         case 'F':
2733                 /* &F -Set Factory-Defaults */
2734                 p[0]++;
2735                 if (info->msr & UART_MSR_DCD)
2736                         PARSE_ERROR1;
2737                 isdn_tty_reset_profile(m);
2738                 isdn_tty_modem_reset_regs(info, 1);
2739                 break;
2740 #ifdef DUMMY_HAYES_AT
2741         case 'K':
2742                 /* only for be compilant with common scripts */
2743                 /* &K Flowcontrol - no function */
2744                 p[0]++;
2745                 isdn_getnum(p);
2746                 break;
2747 #endif
2748         case 'L':
2749                 /* &L -Set Numbers to listen on */
2750                 p[0]++;
2751                 i = 0;
2752                 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2753                        (i < ISDN_LMSNLEN - 1))
2754                         m->lmsn[i++] = *p[0]++;
2755                 m->lmsn[i] = '\0';
2756                 break;
2757         case 'R':
2758                 /* &R - Set V.110 bitrate adaption */
2759                 p[0]++;
2760                 i = isdn_getnum(p);
2761                 switch (i) {
2762                 case 0:
2763                         /* Switch off V.110, back to X.75 */
2764                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2765                         m->mdmreg[REG_SI2] = 0;
2766                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2767                         break;
2768                 case 9600:
2769                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2770                         m->mdmreg[REG_SI2] = 197;
2771                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2772                         break;
2773                 case 19200:
2774                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2775                         m->mdmreg[REG_SI2] = 199;
2776                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2777                         break;
2778                 case 38400:
2779                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2780                         m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2781                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2782                         break;
2783                 default:
2784                         PARSE_ERROR1;
2785                 }
2786                 /* Switch off T.70 */
2787                 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2788                 /* Set Service 7 */
2789                 m->mdmreg[REG_SI1] |= 4;
2790                 break;
2791         case 'S':
2792                 /* &S - Set Windowsize */
2793                 p[0]++;
2794                 i = isdn_getnum(p);
2795                 if ((i > 0) && (i < 9))
2796                         m->mdmreg[REG_WSIZE] = i;
2797                 else
2798                         PARSE_ERROR1;
2799                 break;
2800         case 'V':
2801                 /* &V - Show registers */
2802                 p[0]++;
2803                 isdn_tty_at_cout("\r\n", info);
2804                 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2805                         sprintf(rb, "S%02d=%03d%s", i,
2806                                 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2807                         isdn_tty_at_cout(rb, info);
2808                 }
2809                 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2810                         strlen(m->msn) ? m->msn : "None");
2811                 isdn_tty_at_cout(rb, info);
2812                 if (strlen(m->lmsn)) {
2813                         isdn_tty_at_cout("\r\nListen: ", info);
2814                         isdn_tty_at_cout(m->lmsn, info);
2815                         isdn_tty_at_cout("\r\n", info);
2816                 }
2817                 break;
2818         case 'W':
2819                 /* &W - Write Profile */
2820                 p[0]++;
2821                 switch (*p[0]) {
2822                 case '0':
2823                         p[0]++;
2824                         modem_write_profile(m);
2825                         break;
2826                 default:
2827                         PARSE_ERROR1;
2828                 }
2829                 break;
2830         case 'X':
2831                 /* &X - Switch to BTX-Mode and T.70 */
2832                 p[0]++;
2833                 switch (isdn_getnum(p)) {
2834                 case 0:
2835                         m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2836                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2837                         break;
2838                 case 1:
2839                         m->mdmreg[REG_T70] |= BIT_T70;
2840                         m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2841                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2842                         info->xmit_size = 112;
2843                         m->mdmreg[REG_SI1] = 4;
2844                         m->mdmreg[REG_SI2] = 0;
2845                         break;
2846                 case 2:
2847                         m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2848                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2849                         info->xmit_size = 112;
2850                         m->mdmreg[REG_SI1] = 4;
2851                         m->mdmreg[REG_SI2] = 0;
2852                         break;
2853                 default:
2854                         PARSE_ERROR1;
2855                 }
2856                 break;
2857         default:
2858                 PARSE_ERROR1;
2859         }
2860         return 0;
2861 }
2862
2863 static int
2864 isdn_tty_check_ats(int mreg, int mval, modem_info *info, atemu *m)
2865 {
2866         /* Some plausibility checks */
2867         switch (mreg) {
2868         case REG_L2PROT:
2869                 if (mval > ISDN_PROTO_L2_MAX)
2870                         return 1;
2871                 break;
2872         case REG_PSIZE:
2873                 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2874                         return 1;
2875 #ifdef CONFIG_ISDN_AUDIO
2876                 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
2877                         return 1;
2878 #endif
2879                 info->xmit_size = mval * 16;
2880                 switch (m->mdmreg[REG_L2PROT]) {
2881                 case ISDN_PROTO_L2_V11096:
2882                 case ISDN_PROTO_L2_V11019:
2883                 case ISDN_PROTO_L2_V11038:
2884                         info->xmit_size /= 10;
2885                 }
2886                 break;
2887         case REG_SI1I:
2888         case REG_PLAN:
2889         case REG_SCREEN:
2890                 /* readonly registers */
2891                 return 1;
2892         }
2893         return 0;
2894 }
2895
2896 /*
2897  * Perform ATS command
2898  */
2899 static int
2900 isdn_tty_cmd_ATS(char **p, modem_info *info)
2901 {
2902         atemu *m = &info->emu;
2903         int bitpos;
2904         int mreg;
2905         int mval;
2906         int bval;
2907
2908         mreg = isdn_getnum(p);
2909         if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
2910                 PARSE_ERROR1;
2911         switch (*p[0]) {
2912         case '=':
2913                 p[0]++;
2914                 mval = isdn_getnum(p);
2915                 if (mval < 0 || mval > 255)
2916                         PARSE_ERROR1;
2917                 if (isdn_tty_check_ats(mreg, mval, info, m))
2918                         PARSE_ERROR1;
2919                 m->mdmreg[mreg] = mval;
2920                 break;
2921         case '.':
2922                 /* Set/Clear a single bit */
2923                 p[0]++;
2924                 bitpos = isdn_getnum(p);
2925                 if ((bitpos < 0) || (bitpos > 7))
2926                         PARSE_ERROR1;
2927                 switch (*p[0]) {
2928                 case '=':
2929                         p[0]++;
2930                         bval = isdn_getnum(p);
2931                         if (bval < 0 || bval > 1)
2932                                 PARSE_ERROR1;
2933                         if (bval)
2934                                 mval = m->mdmreg[mreg] | (1 << bitpos);
2935                         else
2936                                 mval = m->mdmreg[mreg] & ~(1 << bitpos);
2937                         if (isdn_tty_check_ats(mreg, mval, info, m))
2938                                 PARSE_ERROR1;
2939                         m->mdmreg[mreg] = mval;
2940                         break;
2941                 case '?':
2942                         p[0]++;
2943                         isdn_tty_at_cout("\r\n", info);
2944                         isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
2945                                          info);
2946                         break;
2947                 default:
2948                         PARSE_ERROR1;
2949                 }
2950                 break;
2951         case '?':
2952                 p[0]++;
2953                 isdn_tty_show_profile(mreg, info);
2954                 break;
2955         default:
2956                 PARSE_ERROR1;
2957                 break;
2958         }
2959         return 0;
2960 }
2961
2962 /*
2963  * Perform ATA command
2964  */
2965 static void
2966 isdn_tty_cmd_ATA(modem_info *info)
2967 {
2968         atemu *m = &info->emu;
2969         isdn_ctrl cmd;
2970         int l2;
2971
2972         if (info->msr & UART_MSR_RI) {
2973                 /* Accept incoming call */
2974                 info->last_dir = 0;
2975                 strcpy(info->last_num, dev->num[info->drv_index]);
2976                 m->mdmreg[REG_RINGCNT] = 0;
2977                 info->msr &= ~UART_MSR_RI;
2978                 l2 = m->mdmreg[REG_L2PROT];
2979 #ifdef CONFIG_ISDN_AUDIO
2980                 /* If more than one bit set in reg18, autoselect Layer2 */
2981                 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
2982                         if (m->mdmreg[REG_SI1I] == 1) {
2983                                 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
2984                                         l2 = ISDN_PROTO_L2_TRANS;
2985                         } else
2986                                 l2 = ISDN_PROTO_L2_X75I;
2987                 }
2988 #endif
2989                 cmd.driver = info->isdn_driver;
2990                 cmd.command = ISDN_CMD_SETL2;
2991                 cmd.arg = info->isdn_channel + (l2 << 8);
2992                 info->last_l2 = l2;
2993                 isdn_command(&cmd);
2994                 cmd.driver = info->isdn_driver;
2995                 cmd.command = ISDN_CMD_SETL3;
2996                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
2997 #ifdef CONFIG_ISDN_TTY_FAX
2998                 if (l2 == ISDN_PROTO_L2_FAX) {
2999                         cmd.parm.fax = info->fax;
3000                         info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3001                 }
3002 #endif
3003                 isdn_command(&cmd);
3004                 cmd.driver = info->isdn_driver;
3005                 cmd.arg = info->isdn_channel;
3006                 cmd.command = ISDN_CMD_ACCEPTD;
3007                 info->dialing = 16;
3008                 info->emu.carrierwait = 0;
3009                 isdn_command(&cmd);
3010                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3011         } else
3012                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3013 }
3014
3015 #ifdef CONFIG_ISDN_AUDIO
3016 /*
3017  * Parse AT+F.. commands
3018  */
3019 static int
3020 isdn_tty_cmd_PLUSF(char **p, modem_info *info)
3021 {
3022         atemu *m = &info->emu;
3023         char rs[20];
3024
3025         if (!strncmp(p[0], "CLASS", 5)) {
3026                 p[0] += 5;
3027                 switch (*p[0]) {
3028                 case '?':
3029                         p[0]++;
3030                         sprintf(rs, "\r\n%d",
3031                                 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3032 #ifdef CONFIG_ISDN_TTY_FAX
3033                         if (TTY_IS_FCLASS2(info))
3034                                 sprintf(rs, "\r\n2");
3035                         else if (TTY_IS_FCLASS1(info))
3036                                 sprintf(rs, "\r\n1");
3037 #endif
3038                         isdn_tty_at_cout(rs, info);
3039                         break;
3040                 case '=':
3041                         p[0]++;
3042                         switch (*p[0]) {
3043                         case '0':
3044                                 p[0]++;
3045                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3046                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3047                                 m->mdmreg[REG_SI1] = 4;
3048                                 info->xmit_size =
3049                                         m->mdmreg[REG_PSIZE] * 16;
3050                                 break;
3051 #ifdef CONFIG_ISDN_TTY_FAX
3052                         case '1':
3053                                 p[0]++;
3054                                 if (!(dev->global_features &
3055                                       ISDN_FEATURE_L3_FCLASS1))
3056                                         PARSE_ERROR1;
3057                                 m->mdmreg[REG_SI1] = 1;
3058                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3059                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3060                                 info->xmit_size =
3061                                         m->mdmreg[REG_PSIZE] * 16;
3062                                 break;
3063                         case '2':
3064                                 p[0]++;
3065                                 if (!(dev->global_features &
3066                                       ISDN_FEATURE_L3_FCLASS2))
3067                                         PARSE_ERROR1;
3068                                 m->mdmreg[REG_SI1] = 1;
3069                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3070                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3071                                 info->xmit_size =
3072                                         m->mdmreg[REG_PSIZE] * 16;
3073                                 break;
3074 #endif
3075                         case '8':
3076                                 p[0]++;
3077                                 /* L2 will change on dialout with si=1 */
3078                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3079                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3080                                 m->mdmreg[REG_SI1] = 5;
3081                                 info->xmit_size = VBUF;
3082                                 break;
3083                         case '?':
3084                                 p[0]++;
3085                                 strcpy(rs, "\r\n0,");
3086 #ifdef CONFIG_ISDN_TTY_FAX
3087                                 if (dev->global_features &
3088                                     ISDN_FEATURE_L3_FCLASS1)
3089                                         strcat(rs, "1,");
3090                                 if (dev->global_features &
3091                                     ISDN_FEATURE_L3_FCLASS2)
3092                                         strcat(rs, "2,");
3093 #endif
3094                                 strcat(rs, "8");
3095                                 isdn_tty_at_cout(rs, info);
3096                                 break;
3097                         default:
3098                                 PARSE_ERROR1;
3099                         }
3100                         break;
3101                 default:
3102                         PARSE_ERROR1;
3103                 }
3104                 return 0;
3105         }
3106 #ifdef CONFIG_ISDN_TTY_FAX
3107         return (isdn_tty_cmd_PLUSF_FAX(p, info));
3108 #else
3109         PARSE_ERROR1;
3110 #endif
3111 }
3112
3113 /*
3114  * Parse AT+V.. commands
3115  */
3116 static int
3117 isdn_tty_cmd_PLUSV(char **p, modem_info *info)
3118 {
3119         atemu *m = &info->emu;
3120         isdn_ctrl cmd;
3121         static char *vcmd[] =
3122                 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3123         int i;
3124         int par1;
3125         int par2;
3126         char rs[20];
3127
3128         i = 0;
3129         while (vcmd[i]) {
3130                 if (!strncmp(vcmd[i], p[0], 2)) {
3131                         p[0] += 2;
3132                         break;
3133                 }
3134                 i++;
3135         }
3136         switch (i) {
3137         case 0:
3138                 /* AT+VNH - Auto hangup feature */
3139                 switch (*p[0]) {
3140                 case '?':
3141                         p[0]++;
3142                         isdn_tty_at_cout("\r\n1", info);
3143                         break;
3144                 case '=':
3145                         p[0]++;
3146                         switch (*p[0]) {
3147                         case '1':
3148                                 p[0]++;
3149                                 break;
3150                         case '?':
3151                                 p[0]++;
3152                                 isdn_tty_at_cout("\r\n1", info);
3153                                 break;
3154                         default:
3155                                 PARSE_ERROR1;
3156                         }
3157                         break;
3158                 default:
3159                         PARSE_ERROR1;
3160                 }
3161                 break;
3162         case 1:
3163                 /* AT+VIP - Reset all voice parameters */
3164                 isdn_tty_modem_reset_vpar(m);
3165                 break;
3166         case 2:
3167                 /* AT+VLS - Select device, accept incoming call */
3168                 switch (*p[0]) {
3169                 case '?':
3170                         p[0]++;
3171                         sprintf(rs, "\r\n%d", m->vpar[0]);
3172                         isdn_tty_at_cout(rs, info);
3173                         break;
3174                 case '=':
3175                         p[0]++;
3176                         switch (*p[0]) {
3177                         case '0':
3178                                 p[0]++;
3179                                 m->vpar[0] = 0;
3180                                 break;
3181                         case '2':
3182                                 p[0]++;
3183                                 m->vpar[0] = 2;
3184                                 break;
3185                         case '?':
3186                                 p[0]++;
3187                                 isdn_tty_at_cout("\r\n0,2", info);
3188                                 break;
3189                         default:
3190                                 PARSE_ERROR1;
3191                         }
3192                         break;
3193                 default:
3194                         PARSE_ERROR1;
3195                 }
3196                 break;
3197         case 3:
3198                 /* AT+VRX - Start recording */
3199                 if (!m->vpar[0])
3200                         PARSE_ERROR1;
3201                 if (info->online != 1) {
3202                         isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3203                         return 1;
3204                 }
3205                 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3206                 if (!info->dtmf_state) {
3207                         printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3208                         PARSE_ERROR1;
3209                 }
3210                 info->silence_state = isdn_audio_silence_init(info->silence_state);
3211                 if (!info->silence_state) {
3212                         printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3213                         PARSE_ERROR1;
3214                 }
3215                 if (m->vpar[3] < 5) {
3216                         info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3217                         if (!info->adpcmr) {
3218                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3219                                 PARSE_ERROR1;
3220                         }
3221                 }
3222 #ifdef ISDN_DEBUG_AT
3223                 printk(KERN_DEBUG "AT: +VRX\n");
3224 #endif
3225                 info->vonline |= 1;
3226                 isdn_tty_modem_result(RESULT_CONNECT, info);
3227                 return 0;
3228                 break;
3229         case 4:
3230                 /* AT+VSD - Silence detection */
3231                 switch (*p[0]) {
3232                 case '?':
3233                         p[0]++;
3234                         sprintf(rs, "\r\n<%d>,<%d>",
3235                                 m->vpar[1],
3236                                 m->vpar[2]);
3237                         isdn_tty_at_cout(rs, info);
3238                         break;
3239                 case '=':
3240                         p[0]++;
3241                         if ((*p[0] >= '0') && (*p[0] <= '9')) {
3242                                 par1 = isdn_getnum(p);
3243                                 if ((par1 < 0) || (par1 > 31))
3244                                         PARSE_ERROR1;
3245                                 if (*p[0] != ',')
3246                                         PARSE_ERROR1;
3247                                 p[0]++;
3248                                 par2 = isdn_getnum(p);
3249                                 if ((par2 < 0) || (par2 > 255))
3250                                         PARSE_ERROR1;
3251                                 m->vpar[1] = par1;
3252                                 m->vpar[2] = par2;
3253                                 break;
3254                         } else
3255                                 if (*p[0] == '?') {
3256                                         p[0]++;
3257                                         isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3258                                                          info);
3259                                         break;
3260                                 } else
3261                                         PARSE_ERROR1;
3262                         break;
3263                 default:
3264                         PARSE_ERROR1;
3265                 }
3266                 break;
3267         case 5:
3268                 /* AT+VSM - Select compression */
3269                 switch (*p[0]) {
3270                 case '?':
3271                         p[0]++;
3272                         sprintf(rs, "\r\n<%d>,<%d><8000>",
3273                                 m->vpar[3],
3274                                 m->vpar[1]);
3275                         isdn_tty_at_cout(rs, info);
3276                         break;
3277                 case '=':
3278                         p[0]++;
3279                         switch (*p[0]) {
3280                         case '2':
3281                         case '3':
3282                         case '4':
3283                         case '5':
3284                         case '6':
3285                                 par1 = isdn_getnum(p);
3286                                 if ((par1 < 2) || (par1 > 6))
3287                                         PARSE_ERROR1;
3288                                 m->vpar[3] = par1;
3289                                 break;
3290                         case '?':
3291                                 p[0]++;
3292                                 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3293                                                  info);
3294                                 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3295                                                  info);
3296                                 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3297                                                  info);
3298                                 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3299                                                  info);
3300                                 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3301                                                  info);
3302                                 break;
3303                         default:
3304                                 PARSE_ERROR1;
3305                         }
3306                         break;
3307                 default:
3308                         PARSE_ERROR1;
3309                 }
3310                 break;
3311         case 6:
3312                 /* AT+VTX - Start sending */
3313                 if (!m->vpar[0])
3314                         PARSE_ERROR1;
3315                 if (info->online != 1) {
3316                         isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3317                         return 1;
3318                 }
3319                 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3320                 if (!info->dtmf_state) {
3321                         printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3322                         PARSE_ERROR1;
3323                 }
3324                 if (m->vpar[3] < 5) {
3325                         info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3326                         if (!info->adpcms) {
3327                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3328                                 PARSE_ERROR1;
3329                         }
3330                 }
3331 #ifdef ISDN_DEBUG_AT
3332                 printk(KERN_DEBUG "AT: +VTX\n");
3333 #endif
3334                 m->lastDLE = 0;
3335                 info->vonline |= 2;
3336                 isdn_tty_modem_result(RESULT_CONNECT, info);
3337                 return 0;
3338                 break;
3339         case 7:
3340                 /* AT+VDD - DTMF detection */
3341                 switch (*p[0]) {
3342                 case '?':
3343                         p[0]++;
3344                         sprintf(rs, "\r\n<%d>,<%d>",
3345                                 m->vpar[4],
3346                                 m->vpar[5]);
3347                         isdn_tty_at_cout(rs, info);
3348                         break;
3349                 case '=':
3350                         p[0]++;
3351                         if ((*p[0] >= '0') && (*p[0] <= '9')) {
3352                                 if (info->online != 1)
3353                                         PARSE_ERROR1;
3354                                 par1 = isdn_getnum(p);
3355                                 if ((par1 < 0) || (par1 > 15))
3356                                         PARSE_ERROR1;
3357                                 if (*p[0] != ',')
3358                                         PARSE_ERROR1;
3359                                 p[0]++;
3360                                 par2 = isdn_getnum(p);
3361                                 if ((par2 < 0) || (par2 > 255))
3362                                         PARSE_ERROR1;
3363                                 m->vpar[4] = par1;
3364                                 m->vpar[5] = par2;
3365                                 cmd.driver = info->isdn_driver;
3366                                 cmd.command = ISDN_CMD_AUDIO;
3367                                 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3368                                 cmd.parm.num[0] = par1;
3369                                 cmd.parm.num[1] = par2;
3370                                 isdn_command(&cmd);
3371                                 break;
3372                         } else
3373                                 if (*p[0] == '?') {
3374                                         p[0]++;
3375                                         isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3376                                                          info);
3377                                         break;
3378                                 } else
3379                                         PARSE_ERROR1;
3380                         break;
3381                 default:
3382                         PARSE_ERROR1;
3383                 }
3384                 break;
3385         default:
3386                 PARSE_ERROR1;
3387         }
3388         return 0;
3389 }
3390 #endif                          /* CONFIG_ISDN_AUDIO */
3391
3392 /*
3393  * Parse and perform an AT-command-line.
3394  */
3395 static void
3396 isdn_tty_parse_at(modem_info *info)
3397 {
3398         atemu *m = &info->emu;
3399         char *p;
3400         char ds[ISDN_MSNLEN];
3401
3402 #ifdef ISDN_DEBUG_AT
3403         printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3404 #endif
3405         for (p = &m->mdmcmd[2]; *p;) {
3406                 switch (*p) {
3407                 case ' ':
3408                         p++;
3409                         break;
3410                 case 'A':
3411                         /* A - Accept incoming call */
3412                         p++;
3413                         isdn_tty_cmd_ATA(info);
3414                         return;
3415                 case 'D':
3416                         /* D - Dial */
3417                         if (info->msr & UART_MSR_DCD)
3418                                 PARSE_ERROR;
3419                         if (info->msr & UART_MSR_RI) {
3420                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3421                                 return;
3422                         }
3423                         isdn_tty_getdial(++p, ds, sizeof ds);
3424                         p += strlen(p);
3425                         if (!strlen(m->msn))
3426                                 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3427                         else if (strlen(ds))
3428                                 isdn_tty_dial(ds, info, m);
3429                         else
3430                                 PARSE_ERROR;
3431                         return;
3432                 case 'E':
3433                         /* E - Turn Echo on/off */
3434                         p++;
3435                         switch (isdn_getnum(&p)) {
3436                         case 0:
3437                                 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3438                                 break;
3439                         case 1:
3440                                 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3441                                 break;
3442                         default:
3443                                 PARSE_ERROR;
3444                         }
3445                         break;
3446                 case 'H':
3447                         /* H - On/Off-hook */
3448                         p++;
3449                         switch (*p) {
3450                         case '0':
3451                                 p++;
3452                                 isdn_tty_on_hook(info);
3453                                 break;
3454                         case '1':
3455                                 p++;
3456                                 isdn_tty_off_hook();
3457                                 break;
3458                         default:
3459                                 isdn_tty_on_hook(info);
3460                                 break;
3461                         }
3462                         break;
3463                 case 'I':
3464                         /* I - Information */
3465                         p++;
3466                         isdn_tty_at_cout("\r\nLinux ISDN", info);
3467                         switch (*p) {
3468                         case '0':
3469                         case '1':
3470                                 p++;
3471                                 break;
3472                         case '2':
3473                                 p++;
3474                                 isdn_tty_report(info);
3475                                 break;
3476                         case '3':
3477                                 p++;
3478                                 snprintf(ds, sizeof(ds), "\r\n%d", info->emu.charge);
3479                                 isdn_tty_at_cout(ds, info);
3480                                 break;
3481                         default:;
3482                         }
3483                         break;
3484 #ifdef DUMMY_HAYES_AT
3485                 case 'L':
3486                 case 'M':
3487                         /* only for be compilant with common scripts */
3488                         /* no function */
3489                         p++;
3490                         isdn_getnum(&p);
3491                         break;
3492 #endif
3493                 case 'O':
3494                         /* O - Go online */
3495                         p++;
3496                         if (info->msr & UART_MSR_DCD)
3497                                 /* if B-Channel is up */
3498                                 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT : RESULT_CONNECT64000, info);
3499                         else
3500                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3501                         return;
3502                 case 'Q':
3503                         /* Q - Turn Emulator messages on/off */
3504                         p++;
3505                         switch (isdn_getnum(&p)) {
3506                         case 0:
3507                                 m->mdmreg[REG_RESP] |= BIT_RESP;
3508                                 break;
3509                         case 1:
3510                                 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3511                                 break;
3512                         default:
3513                                 PARSE_ERROR;
3514                         }
3515                         break;
3516                 case 'S':
3517                         /* S - Set/Get Register */
3518                         p++;
3519                         if (isdn_tty_cmd_ATS(&p, info))
3520                                 return;
3521                         break;
3522                 case 'V':
3523                         /* V - Numeric or ASCII Emulator-messages */
3524                         p++;
3525                         switch (isdn_getnum(&p)) {
3526                         case 0:
3527                                 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3528                                 break;
3529                         case 1:
3530                                 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3531                                 break;
3532                         default:
3533                                 PARSE_ERROR;
3534                         }
3535                         break;
3536                 case 'Z':
3537                         /* Z - Load Registers from Profile */
3538                         p++;
3539                         if (info->msr & UART_MSR_DCD) {
3540                                 info->online = 0;
3541                                 isdn_tty_on_hook(info);
3542                         }
3543                         isdn_tty_modem_reset_regs(info, 1);
3544                         break;
3545                 case '+':
3546                         p++;
3547                         switch (*p) {
3548 #ifdef CONFIG_ISDN_AUDIO
3549                         case 'F':
3550                                 p++;
3551                                 if (isdn_tty_cmd_PLUSF(&p, info))
3552                                         return;
3553                                 break;
3554                         case 'V':
3555                                 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3556                                     (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3557                                         PARSE_ERROR;
3558                                 p++;
3559                                 if (isdn_tty_cmd_PLUSV(&p, info))
3560                                         return;
3561                                 break;
3562 #endif                          /* CONFIG_ISDN_AUDIO */
3563                         case 'S':       /* SUSPEND */
3564                                 p++;
3565                                 isdn_tty_get_msnstr(ds, &p);
3566                                 isdn_tty_suspend(ds, info, m);
3567                                 break;
3568                         case 'R':       /* RESUME */
3569                                 p++;
3570                                 isdn_tty_get_msnstr(ds, &p);
3571                                 isdn_tty_resume(ds, info, m);
3572                                 break;
3573                         case 'M':       /* MESSAGE */
3574                                 p++;
3575                                 isdn_tty_send_msg(info, m, p);
3576                                 break;
3577                         default:
3578                                 PARSE_ERROR;
3579                         }
3580                         break;
3581                 case '&':
3582                         p++;
3583                         if (isdn_tty_cmd_ATand(&p, info))
3584                                 return;
3585                         break;
3586                 default:
3587                         PARSE_ERROR;
3588                 }
3589         }
3590 #ifdef CONFIG_ISDN_AUDIO
3591         if (!info->vonline)
3592 #endif
3593                 isdn_tty_modem_result(RESULT_OK, info);
3594 }
3595
3596 /* Need own toupper() because standard-toupper is not available
3597  * within modules.
3598  */
3599 #define my_toupper(c) (((c >= 'a') && (c <= 'z')) ? (c & 0xdf) : c)
3600
3601 /*
3602  * Perform line-editing of AT-commands
3603  *
3604  * Parameters:
3605  *   p        inputbuffer
3606  *   count    length of buffer
3607  *   channel  index to line (minor-device)
3608  */
3609 static int
3610 isdn_tty_edit_at(const char *p, int count, modem_info *info)
3611 {
3612         atemu *m = &info->emu;
3613         int total = 0;
3614         u_char c;
3615         char eb[2];
3616         int cnt;
3617
3618         for (cnt = count; cnt > 0; p++, cnt--) {
3619                 c = *p;
3620                 total++;
3621                 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3622                         /* Separator (CR or LF) */
3623                         m->mdmcmd[m->mdmcmdl] = 0;
3624                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3625                                 eb[0] = c;
3626                                 eb[1] = 0;
3627                                 isdn_tty_at_cout(eb, info);
3628                         }
3629                         if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3630                                 isdn_tty_parse_at(info);
3631                         m->mdmcmdl = 0;
3632                         continue;
3633                 }
3634                 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3635                         /* Backspace-Function */
3636                         if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3637                                 if (m->mdmcmdl)
3638                                         m->mdmcmdl--;
3639                                 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3640                                         isdn_tty_at_cout("\b", info);
3641                         }
3642                         continue;
3643                 }
3644                 if (cmdchar(c)) {
3645                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3646                                 eb[0] = c;
3647                                 eb[1] = 0;
3648                                 isdn_tty_at_cout(eb, info);
3649                         }
3650                         if (m->mdmcmdl < 255) {
3651                                 c = my_toupper(c);
3652                                 switch (m->mdmcmdl) {
3653                                 case 1:
3654                                         if (c == 'T') {
3655                                                 m->mdmcmd[m->mdmcmdl] = c;
3656                                                 m->mdmcmd[++m->mdmcmdl] = 0;
3657                                                 break;
3658                                         } else
3659                                                 m->mdmcmdl = 0;
3660                                         /* Fall through, check for 'A' */
3661                                 case 0:
3662                                         if (c == 'A') {
3663                                                 m->mdmcmd[m->mdmcmdl] = c;
3664                                                 m->mdmcmd[++m->mdmcmdl] = 0;
3665                                         }
3666                                         break;
3667                                 default:
3668                                         m->mdmcmd[m->mdmcmdl] = c;
3669                                         m->mdmcmd[++m->mdmcmdl] = 0;
3670                                 }
3671                         }
3672                 }
3673         }
3674         return total;
3675 }
3676
3677 /*
3678  * Switch all modem-channels who are online and got a valid
3679  * escape-sequence 1.5 seconds ago, to command-mode.
3680  * This function is called every second via timer-interrupt from within
3681  * timer-dispatcher isdn_timer_function()
3682  */
3683 void
3684 isdn_tty_modem_escape(void)
3685 {
3686         int ton = 0;
3687         int i;
3688         int midx;
3689
3690         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3691                 if (USG_MODEM(dev->usage[i]) && (midx = dev->m_idx[i]) >= 0) {
3692                         modem_info *info = &dev->mdm.info[midx];
3693                         if (info->online) {
3694                                 ton = 1;
3695                                 if ((info->emu.pluscount == 3) &&
3696                                     time_after(jiffies,
3697                                             info->emu.lastplus + PLUSWAIT2)) {
3698                                         info->emu.pluscount = 0;
3699                                         info->online = 0;
3700                                         isdn_tty_modem_result(RESULT_OK, info);
3701                                 }
3702                         }
3703                 }
3704         isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3705 }
3706
3707 /*
3708  * Put a RING-message to all modem-channels who have the RI-bit set.
3709  * This function is called every second via timer-interrupt from within
3710  * timer-dispatcher isdn_timer_function()
3711  */
3712 void
3713 isdn_tty_modem_ring(void)
3714 {
3715         int ton = 0;
3716         int i;
3717
3718         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3719                 modem_info *info = &dev->mdm.info[i];
3720                 if (info->msr & UART_MSR_RI) {
3721                         ton = 1;
3722                         isdn_tty_modem_result(RESULT_RING, info);
3723                 }
3724         }
3725         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3726 }
3727
3728 /*
3729  * For all online tty's, try sending data to
3730  * the lower levels.
3731  */
3732 void
3733 isdn_tty_modem_xmit(void)
3734 {
3735         int ton = 1;
3736         int i;
3737
3738         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3739                 modem_info *info = &dev->mdm.info[i];
3740                 if (info->online) {
3741                         ton = 1;
3742                         isdn_tty_senddown(info);
3743                         isdn_tty_tint(info);
3744                 }
3745         }
3746         isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3747 }
3748
3749 /*
3750  * Check all channels if we have a 'no carrier' timeout.
3751  * Timeout value is set by Register S7.
3752  */
3753 void
3754 isdn_tty_carrier_timeout(void)
3755 {
3756         int ton = 0;
3757         int i;
3758
3759         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3760                 modem_info *info = &dev->mdm.info[i];
3761                 if (!info->dialing)
3762                         continue;
3763                 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3764                         info->dialing = 0;
3765                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3766                         isdn_tty_modem_hup(info, 1);
3767                 } else
3768                         ton = 1;
3769         }
3770         isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3771 }