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         memcpy(skb_put(skb, buflen), info->port.xmit_buf, buflen);
 478         info->xmit_count = 0;
 479 #ifdef CONFIG_ISDN_AUDIO
 480         if (info->vonline & 2) {
 481                 /* For now, ifmt is fixed to 1 (alaw), since this
 482                  * is used with ISDN everywhere in the world, except
 483                  * US, Canada and Japan.
 484                  * Later, when US-ISDN protocols are implemented,
 485                  * this setting will depend on the D-channel protocol.
 486                  */
 487                 int ifmt = 1;
 488
 489                 /* voice conversion/decompression */
 490                 switch (info->emu.vpar[3]) {
 491                 case 2:
 492                 case 3:
 493                 case 4:
 494                         /* adpcm, compatible to ZyXel 1496 modem
 495                          * with ROM revision 6.01
 496                          */
 497                         audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
 498                                                           ifmt,
 499                                                           skb->data,
 500                                                           skb_put(skb, audio_len),
 501                                                           buflen);
 502                         skb_pull(skb, buflen);
 503                         skb_trim(skb, audio_len);
 504                         break;
 505                 case 5:
 506                         /* a-law */
 507                         if (!ifmt)
 508                                 isdn_audio_alaw2ulaw(skb->data,
 509                                                      buflen);
 510                         break;
 511                 case 6:
 512                         /* u-law */
 513                         if (ifmt)
 514                                 isdn_audio_ulaw2alaw(skb->data,
 515                                                      buflen);
 516                         break;
 517                 }
 518         }
 519 #endif                          /* CONFIG_ISDN_AUDIO */
 520         if (info->emu.mdmreg[REG_T70] & BIT_T70) {
 521                 /* Add T.70 simplified header */
 522                 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
 523                         memcpy(skb_push(skb, 2), "\1\0", 2);
 524                 else
 525                         memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
 526         }
 527         skb_queue_tail(&info->xmit_queue, skb);
 528 }
 529
 530 /************************************************************
 531  *
 532  * Modem-functions
 533  *
 534  * mostly "stolen" from original Linux-serial.c and friends.
 535  *
 536  ************************************************************/
 537
 538 /* The next routine is called once from within timer-interrupt
 539  * triggered within isdn_tty_modem_ncarrier(). It calls
 540  * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
 541  * into the tty's buffer.
 542  */
 543 static void
 544 isdn_tty_modem_do_ncarrier(unsigned long data)
 545 {
 546         modem_info *info = (modem_info *) data;
 547         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
 548 }
 549
 550 /* Next routine is called, whenever the DTR-signal is raised.
 551  * It checks the ncarrier-flag, and triggers the above routine
 552  * when necessary. The ncarrier-flag is set, whenever DTR goes
 553  * low.
 554  */
 555 static void
 556 isdn_tty_modem_ncarrier(modem_info *info)
 557 {
 558         if (info->ncarrier) {
 559                 info->nc_timer.expires = jiffies + HZ;
 560                 add_timer(&info->nc_timer);
 561         }
 562 }
 563
 564 /*
 565  * return the usage calculated by si and layer 2 protocol
 566  */
 567 static int
 568 isdn_calc_usage(int si, int l2)
 569 {
 570         int usg = ISDN_USAGE_MODEM;
 571
 572 #ifdef CONFIG_ISDN_AUDIO
 573         if (si == 1) {
 574                 switch (l2) {
 575                 case ISDN_PROTO_L2_MODEM:
 576                         usg = ISDN_USAGE_MODEM;
 577                         break;
 578 #ifdef CONFIG_ISDN_TTY_FAX
 579                 case ISDN_PROTO_L2_FAX:
 580                         usg = ISDN_USAGE_FAX;
 581                         break;
 582 #endif
 583                 case ISDN_PROTO_L2_TRANS:
 584                 default:
 585                         usg = ISDN_USAGE_VOICE;
 586                         break;
 587                 }
 588         }
 589 #endif
 590         return (usg);
 591 }
 592
 593 /* isdn_tty_dial() performs dialing of a tty an the necessary
 594  * setup of the lower levels before that.
 595  */
 596 static void
 597 isdn_tty_dial(char *n, modem_info *info, atemu *m)
 598 {
 599         int usg = ISDN_USAGE_MODEM;
 600         int si = 7;
 601         int l2 = m->mdmreg[REG_L2PROT];
 602         u_long flags;
 603         isdn_ctrl cmd;
 604         int i;
 605         int j;
 606
 607         for (j = 7; j >= 0; j--)
 608                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 609                         si = bit2si[j];
 610                         break;
 611                 }
 612         usg = isdn_calc_usage(si, l2);
 613 #ifdef CONFIG_ISDN_AUDIO
 614         if ((si == 1) &&
 615             (l2 != ISDN_PROTO_L2_MODEM)
 616 #ifdef CONFIG_ISDN_TTY_FAX
 617             && (l2 != ISDN_PROTO_L2_FAX)
 618 #endif
 619                 ) {
 620                 l2 = ISDN_PROTO_L2_TRANS;
 621                 usg = ISDN_USAGE_VOICE;
 622         }
 623 #endif
 624         m->mdmreg[REG_SI1I] = si2bit[si];
 625         spin_lock_irqsave(&dev->lock, flags);
 626         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 627         if (i < 0) {
 628                 spin_unlock_irqrestore(&dev->lock, flags);
 629                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 630         } else {
 631                 info->isdn_driver = dev->drvmap[i];
 632                 info->isdn_channel = dev->chanmap[i];
 633                 info->drv_index = i;
 634                 dev->m_idx[i] = info->line;
 635                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 636                 info->last_dir = 1;
 637                 strcpy(info->last_num, n);
 638                 isdn_info_update();
 639                 spin_unlock_irqrestore(&dev->lock, flags);
 640                 cmd.driver = info->isdn_driver;
 641                 cmd.arg = info->isdn_channel;
 642                 cmd.command = ISDN_CMD_CLREAZ;
 643                 isdn_command(&cmd);
 644                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 645                 cmd.driver = info->isdn_driver;
 646                 cmd.command = ISDN_CMD_SETEAZ;
 647                 isdn_command(&cmd);
 648                 cmd.driver = info->isdn_driver;
 649                 cmd.command = ISDN_CMD_SETL2;
 650                 info->last_l2 = l2;
 651                 cmd.arg = info->isdn_channel + (l2 << 8);
 652                 isdn_command(&cmd);
 653                 cmd.driver = info->isdn_driver;
 654                 cmd.command = ISDN_CMD_SETL3;
 655                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 656 #ifdef CONFIG_ISDN_TTY_FAX
 657                 if (l2 == ISDN_PROTO_L2_FAX) {
 658                         cmd.parm.fax = info->fax;
 659                         info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
 660                 }
 661 #endif
 662                 isdn_command(&cmd);
 663                 cmd.driver = info->isdn_driver;
 664                 cmd.arg = info->isdn_channel;
 665                 sprintf(cmd.parm.setup.phone, "%s", n);
 666                 sprintf(cmd.parm.setup.eazmsn, "%s",
 667                         isdn_map_eaz2msn(m->msn, info->isdn_driver));
 668                 cmd.parm.setup.si1 = si;
 669                 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
 670                 cmd.command = ISDN_CMD_DIAL;
 671                 info->dialing = 1;
 672                 info->emu.carrierwait = 0;
 673                 strcpy(dev->num[i], n);
 674                 isdn_info_update();
 675                 isdn_command(&cmd);
 676                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
 677         }
 678 }
 679
 680 /* isdn_tty_hangup() disassociates a tty from the real
 681  * ISDN-line (hangup). The usage-status is cleared
 682  * and some cleanup is done also.
 683  */
 684 void
 685 isdn_tty_modem_hup(modem_info *info, int local)
 686 {
 687         isdn_ctrl cmd;
 688         int di, ch;
 689
 690         if (!info)
 691                 return;
 692
 693         di = info->isdn_driver;
 694         ch = info->isdn_channel;
 695         if (di < 0 || ch < 0)
 696                 return;
 697
 698         info->isdn_driver = -1;
 699         info->isdn_channel = -1;
 700
 701 #ifdef ISDN_DEBUG_MODEM_HUP
 702         printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
 703 #endif
 704         info->rcvsched = 0;
 705         isdn_tty_flush_buffer(info->port.tty);
 706         if (info->online) {
 707                 info->last_lhup = local;
 708                 info->online = 0;
 709                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
 710         }
 711 #ifdef CONFIG_ISDN_AUDIO
 712         info->vonline = 0;
 713 #ifdef CONFIG_ISDN_TTY_FAX
 714         info->faxonline = 0;
 715         info->fax->phase = ISDN_FAX_PHASE_IDLE;
 716 #endif
 717         info->emu.vpar[4] = 0;
 718         info->emu.vpar[5] = 8;
 719         kfree(info->dtmf_state);
 720         info->dtmf_state = NULL;
 721         kfree(info->silence_state);
 722         info->silence_state = NULL;
 723         kfree(info->adpcms);
 724         info->adpcms = NULL;
 725         kfree(info->adpcmr);
 726         info->adpcmr = NULL;
 727 #endif
 728         if ((info->msr & UART_MSR_RI) &&
 729             (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
 730                 isdn_tty_modem_result(RESULT_RUNG, info);
 731         info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
 732         info->lsr |= UART_LSR_TEMT;
 733
 734         if (local) {
 735                 cmd.driver = di;
 736                 cmd.command = ISDN_CMD_HANGUP;
 737                 cmd.arg = ch;
 738                 isdn_command(&cmd);
 739         }
 740
 741         isdn_all_eaz(di, ch);
 742         info->emu.mdmreg[REG_RINGCNT] = 0;
 743         isdn_free_channel(di, ch, 0);
 744
 745         if (info->drv_index >= 0) {
 746                 dev->m_idx[info->drv_index] = -1;
 747                 info->drv_index = -1;
 748         }
 749 }
 750
 751 /*
 752  * Begin of a CAPI like interface, currently used only for
 753  * supplementary service (CAPI 2.0 part III)
 754  */
 755 #include <linux/isdn/capicmd.h>
 756 #include <linux/module.h>
 757
 758 int
 759 isdn_tty_capi_facility(capi_msg *cm) {
 760         return (-1); /* dummy */
 761 }
 762
 763 /* isdn_tty_suspend() tries to suspend the current tty connection
 764  */
 765 static void
 766 isdn_tty_suspend(char *id, modem_info *info, atemu *m)
 767 {
 768         isdn_ctrl cmd;
 769
 770         int l;
 771
 772         if (!info)
 773                 return;
 774
 775 #ifdef ISDN_DEBUG_MODEM_SERVICES
 776         printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
 777 #endif
 778         l = strlen(id);
 779         if ((info->isdn_driver >= 0)) {
 780                 cmd.parm.cmsg.Length = l + 18;
 781                 cmd.parm.cmsg.Command = CAPI_FACILITY;
 782                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 783                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 784                 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
 785                 cmd.parm.cmsg.para[1] = 0;
 786                 cmd.parm.cmsg.para[2] = l + 3;
 787                 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
 788                 cmd.parm.cmsg.para[4] = 0;
 789                 cmd.parm.cmsg.para[5] = l;
 790                 strncpy(&cmd.parm.cmsg.para[6], id, l);
 791                 cmd.command = CAPI_PUT_MESSAGE;
 792                 cmd.driver = info->isdn_driver;
 793                 cmd.arg = info->isdn_channel;
 794                 isdn_command(&cmd);
 795         }
 796 }
 797
 798 /* isdn_tty_resume() tries to resume a suspended call
 799  * setup of the lower levels before that. unfortunately here is no
 800  * checking for compatibility of used protocols implemented by Q931
 801  * It does the same things like isdn_tty_dial, the last command
 802  * is different, may be we can merge it.
 803  */
 804
 805 static void
 806 isdn_tty_resume(char *id, modem_info *info, atemu *m)
 807 {
 808         int usg = ISDN_USAGE_MODEM;
 809         int si = 7;
 810         int l2 = m->mdmreg[REG_L2PROT];
 811         isdn_ctrl cmd;
 812         ulong flags;
 813         int i;
 814         int j;
 815         int l;
 816
 817         l = strlen(id);
 818         for (j = 7; j >= 0; j--)
 819                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 820                         si = bit2si[j];
 821                         break;
 822                 }
 823         usg = isdn_calc_usage(si, l2);
 824 #ifdef CONFIG_ISDN_AUDIO
 825         if ((si == 1) &&
 826             (l2 != ISDN_PROTO_L2_MODEM)
 827 #ifdef CONFIG_ISDN_TTY_FAX
 828             && (l2 != ISDN_PROTO_L2_FAX)
 829 #endif
 830                 ) {
 831                 l2 = ISDN_PROTO_L2_TRANS;
 832                 usg = ISDN_USAGE_VOICE;
 833         }
 834 #endif
 835         m->mdmreg[REG_SI1I] = si2bit[si];
 836         spin_lock_irqsave(&dev->lock, flags);
 837         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 838         if (i < 0) {
 839                 spin_unlock_irqrestore(&dev->lock, flags);
 840                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 841         } else {
 842                 info->isdn_driver = dev->drvmap[i];
 843                 info->isdn_channel = dev->chanmap[i];
 844                 info->drv_index = i;
 845                 dev->m_idx[i] = info->line;
 846                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 847                 info->last_dir = 1;
 848 //              strcpy(info->last_num, n);
 849                 isdn_info_update();
 850                 spin_unlock_irqrestore(&dev->lock, flags);
 851                 cmd.driver = info->isdn_driver;
 852                 cmd.arg = info->isdn_channel;
 853                 cmd.command = ISDN_CMD_CLREAZ;
 854                 isdn_command(&cmd);
 855                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 856                 cmd.driver = info->isdn_driver;
 857                 cmd.command = ISDN_CMD_SETEAZ;
 858                 isdn_command(&cmd);
 859                 cmd.driver = info->isdn_driver;
 860                 cmd.command = ISDN_CMD_SETL2;
 861                 info->last_l2 = l2;
 862                 cmd.arg = info->isdn_channel + (l2 << 8);
 863                 isdn_command(&cmd);
 864                 cmd.driver = info->isdn_driver;
 865                 cmd.command = ISDN_CMD_SETL3;
 866                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 867                 isdn_command(&cmd);
 868                 cmd.driver = info->isdn_driver;
 869                 cmd.arg = info->isdn_channel;
 870                 cmd.parm.cmsg.Length = l + 18;
 871                 cmd.parm.cmsg.Command = CAPI_FACILITY;
 872                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 873                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 874                 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
 875                 cmd.parm.cmsg.para[1] = 0;
 876                 cmd.parm.cmsg.para[2] = l + 3;
 877                 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
 878                 cmd.parm.cmsg.para[4] = 0;
 879                 cmd.parm.cmsg.para[5] = l;
 880                 strncpy(&cmd.parm.cmsg.para[6], id, l);
 881                 cmd.command = CAPI_PUT_MESSAGE;
 882                 info->dialing = 1;
 883 //              strcpy(dev->num[i], n);
 884                 isdn_info_update();
 885                 isdn_command(&cmd);
 886                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
 887         }
 888 }
 889
 890 /* isdn_tty_send_msg() sends a message to a HL driver
 891  * This is used for hybrid modem cards to send AT commands to it
 892  */
 893
 894 static void
 895 isdn_tty_send_msg(modem_info *info, atemu *m, char *msg)
 896 {
 897         int usg = ISDN_USAGE_MODEM;
 898         int si = 7;
 899         int l2 = m->mdmreg[REG_L2PROT];
 900         isdn_ctrl cmd;
 901         ulong flags;
 902         int i;
 903         int j;
 904         int l;
 905
 906         l = min(strlen(msg), sizeof(cmd.parm) - sizeof(cmd.parm.cmsg)
 907                 + sizeof(cmd.parm.cmsg.para) - 2);
 908
 909         if (!l) {
 910                 isdn_tty_modem_result(RESULT_ERROR, info);
 911                 return;
 912         }
 913         for (j = 7; j >= 0; j--)
 914                 if (m->mdmreg[REG_SI1] & (1 << j)) {
 915                         si = bit2si[j];
 916                         break;
 917                 }
 918         usg = isdn_calc_usage(si, l2);
 919 #ifdef CONFIG_ISDN_AUDIO
 920         if ((si == 1) &&
 921             (l2 != ISDN_PROTO_L2_MODEM)
 922 #ifdef CONFIG_ISDN_TTY_FAX
 923             && (l2 != ISDN_PROTO_L2_FAX)
 924 #endif
 925                 ) {
 926                 l2 = ISDN_PROTO_L2_TRANS;
 927                 usg = ISDN_USAGE_VOICE;
 928         }
 929 #endif
 930         m->mdmreg[REG_SI1I] = si2bit[si];
 931         spin_lock_irqsave(&dev->lock, flags);
 932         i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
 933         if (i < 0) {
 934                 spin_unlock_irqrestore(&dev->lock, flags);
 935                 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
 936         } else {
 937                 info->isdn_driver = dev->drvmap[i];
 938                 info->isdn_channel = dev->chanmap[i];
 939                 info->drv_index = i;
 940                 dev->m_idx[i] = info->line;
 941                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 942                 info->last_dir = 1;
 943                 isdn_info_update();
 944                 spin_unlock_irqrestore(&dev->lock, flags);
 945                 cmd.driver = info->isdn_driver;
 946                 cmd.arg = info->isdn_channel;
 947                 cmd.command = ISDN_CMD_CLREAZ;
 948                 isdn_command(&cmd);
 949                 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
 950                 cmd.driver = info->isdn_driver;
 951                 cmd.command = ISDN_CMD_SETEAZ;
 952                 isdn_command(&cmd);
 953                 cmd.driver = info->isdn_driver;
 954                 cmd.command = ISDN_CMD_SETL2;
 955                 info->last_l2 = l2;
 956                 cmd.arg = info->isdn_channel + (l2 << 8);
 957                 isdn_command(&cmd);
 958                 cmd.driver = info->isdn_driver;
 959                 cmd.command = ISDN_CMD_SETL3;
 960                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
 961                 isdn_command(&cmd);
 962                 cmd.driver = info->isdn_driver;
 963                 cmd.arg = info->isdn_channel;
 964                 cmd.parm.cmsg.Length = l + 14;
 965                 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
 966                 cmd.parm.cmsg.Subcommand = CAPI_REQ;
 967                 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
 968                 cmd.parm.cmsg.para[0] = l + 1;
 969                 strncpy(&cmd.parm.cmsg.para[1], msg, l);
 970                 cmd.parm.cmsg.para[l + 1] = 0xd;
 971                 cmd.command = CAPI_PUT_MESSAGE;
 972 /*              info->dialing = 1;
 973                 strcpy(dev->num[i], n);
 974                 isdn_info_update();
 975 */
 976                 isdn_command(&cmd);
 977         }
 978 }
 979
 980 static inline int
 981 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
 982 {
 983 #ifdef MODEM_PARANOIA_CHECK
 984         if (!info) {
 985                 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
 986                        name, routine);
 987                 return 1;
 988         }
 989         if (info->magic != ISDN_ASYNC_MAGIC) {
 990                 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
 991                        name, routine);
 992                 return 1;
 993         }
 994 #endif
 995         return 0;
 996 }
 997
 998 /*
 999  * This routine is called to set the UART divisor registers to match
1000  * the specified baud rate for a serial port.
1001  */
1002 static void
1003 isdn_tty_change_speed(modem_info *info)
1004 {
1005         struct tty_port *port = &info->port;
1006         uint cflag,
1007                 cval,
1008                 quot;
1009         int i;
1010
1011         if (!port->tty)
1012                 return;
1013         cflag = port->tty->termios.c_cflag;
1014
1015         quot = i = cflag & CBAUD;
1016         if (i & CBAUDEX) {
1017                 i &= ~CBAUDEX;
1018                 if (i < 1 || i > 2)
1019                         port->tty->termios.c_cflag &= ~CBAUDEX;
1020                 else
1021                         i += 15;
1022         }
1023         if (quot) {
1024                 info->mcr |= UART_MCR_DTR;
1025                 isdn_tty_modem_ncarrier(info);
1026         } else {
1027                 info->mcr &= ~UART_MCR_DTR;
1028                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1029 #ifdef ISDN_DEBUG_MODEM_HUP
1030                         printk(KERN_DEBUG "Mhup in changespeed\n");
1031 #endif
1032                         if (info->online)
1033                                 info->ncarrier = 1;
1034                         isdn_tty_modem_reset_regs(info, 0);
1035                         isdn_tty_modem_hup(info, 1);
1036                 }
1037                 return;
1038         }
1039         /* byte size and parity */
1040         cval = cflag & (CSIZE | CSTOPB);
1041         cval >>= 4;
1042         if (cflag & PARENB)
1043                 cval |= UART_LCR_PARITY;
1044         if (!(cflag & PARODD))
1045                 cval |= UART_LCR_EPAR;
1046
1047         tty_port_set_check_carrier(port, ~cflag & CLOCAL);
1048 }
1049
1050 static int
1051 isdn_tty_startup(modem_info *info)
1052 {
1053         if (tty_port_initialized(&info->port))
1054                 return 0;
1055         isdn_lock_drivers();
1056 #ifdef ISDN_DEBUG_MODEM_OPEN
1057         printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1058 #endif
1059         /*
1060          * Now, initialize the UART
1061          */
1062         info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1063         if (info->port.tty)
1064                 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1065         /*
1066          * and set the speed of the serial port
1067          */
1068         isdn_tty_change_speed(info);
1069
1070         tty_port_set_initialized(&info->port, 1);
1071         info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1072         info->send_outstanding = 0;
1073         return 0;
1074 }
1075
1076 /*
1077  * This routine will shutdown a serial port; interrupts are disabled, and
1078  * DTR is dropped if the hangup on close termio flag is on.
1079  */
1080 static void
1081 isdn_tty_shutdown(modem_info *info)
1082 {
1083         if (!tty_port_initialized(&info->port))
1084                 return;
1085 #ifdef ISDN_DEBUG_MODEM_OPEN
1086         printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1087 #endif
1088         isdn_unlock_drivers();
1089         info->msr &= ~UART_MSR_RI;
1090         if (!info->port.tty || (info->port.tty->termios.c_cflag & HUPCL)) {
1091                 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1092                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1093                         isdn_tty_modem_reset_regs(info, 0);
1094 #ifdef ISDN_DEBUG_MODEM_HUP
1095                         printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1096 #endif
1097                         isdn_tty_modem_hup(info, 1);
1098                 }
1099         }
1100         if (info->port.tty)
1101                 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1102
1103         tty_port_set_initialized(&info->port, 0);
1104 }
1105
1106 /* isdn_tty_write() is the main send-routine. It is called from the upper
1107  * levels within the kernel to perform sending data. Depending on the
1108  * online-flag it either directs output to the at-command-interpreter or
1109  * to the lower level. Additional tasks done here:
1110  *  - If online, check for escape-sequence (+++)
1111  *  - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1112  *  - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1113  *  - If dialing, abort dial.
1114  */
1115 static int
1116 isdn_tty_write(struct tty_struct *tty, const u_char *buf, int count)
1117 {
1118         int c;
1119         int total = 0;
1120         modem_info *info = (modem_info *) tty->driver_data;
1121         atemu *m = &info->emu;
1122
1123         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1124                 return 0;
1125         /* See isdn_tty_senddown() */
1126         atomic_inc(&info->xmit_lock);
1127         while (1) {
1128                 c = count;
1129                 if (c > info->xmit_size - info->xmit_count)
1130                         c = info->xmit_size - info->xmit_count;
1131                 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1132                         c = dev->drv[info->isdn_driver]->maxbufsize;
1133                 if (c <= 0)
1134                         break;
1135                 if ((info->online > 1)
1136 #ifdef CONFIG_ISDN_AUDIO
1137                     || (info->vonline & 3)
1138 #endif
1139                         ) {
1140 #ifdef CONFIG_ISDN_AUDIO
1141                         if (!info->vonline)
1142 #endif
1143                                 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1144                                                    &(m->pluscount),
1145                                                    &(m->lastplus));
1146                         memcpy(&info->port.xmit_buf[info->xmit_count], buf, c);
1147 #ifdef CONFIG_ISDN_AUDIO
1148                         if (info->vonline) {
1149                                 int cc = isdn_tty_handleDLEdown(info, m, c);
1150                                 if (info->vonline & 2) {
1151                                         if (!cc) {
1152                                                 /* If DLE decoding results in zero-transmit, but
1153                                                  * c originally was non-zero, do a wakeup.
1154                                                  */
1155                                                 tty_wakeup(tty);
1156                                                 info->msr |= UART_MSR_CTS;
1157                                                 info->lsr |= UART_LSR_TEMT;
1158                                         }
1159                                         info->xmit_count += cc;
1160                                 }
1161                                 if ((info->vonline & 3) == 1) {
1162                                         /* Do NOT handle Ctrl-Q or Ctrl-S
1163                                          * when in full-duplex audio mode.
1164                                          */
1165                                         if (isdn_tty_end_vrx(buf, c)) {
1166                                                 info->vonline &= ~1;
1167 #ifdef ISDN_DEBUG_MODEM_VOICE
1168                                                 printk(KERN_DEBUG
1169                                                        "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1170                                                        info->line);
1171 #endif
1172                                                 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1173                                         }
1174                                 }
1175                         } else
1176                                 if (TTY_IS_FCLASS1(info)) {
1177                                         int cc = isdn_tty_handleDLEdown(info, m, c);
1178
1179                                         if (info->vonline & 4) { /* ETX seen */
1180                                                 isdn_ctrl c;
1181
1182                                                 c.command = ISDN_CMD_FAXCMD;
1183                                                 c.driver = info->isdn_driver;
1184                                                 c.arg = info->isdn_channel;
1185                                                 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1186                                                 c.parm.aux.subcmd = ETX;
1187                                                 isdn_command(&c);
1188                                         }
1189                                         info->vonline = 0;
1190 #ifdef ISDN_DEBUG_MODEM_VOICE
1191                                         printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1192 #endif
1193                                         info->xmit_count += cc;
1194                                 } else
1195 #endif
1196                                         info->xmit_count += c;
1197                 } else {
1198                         info->msr |= UART_MSR_CTS;
1199                         info->lsr |= UART_LSR_TEMT;
1200                         if (info->dialing) {
1201                                 info->dialing = 0;
1202 #ifdef ISDN_DEBUG_MODEM_HUP
1203                                 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1204 #endif
1205                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1206                                 isdn_tty_modem_hup(info, 1);
1207                         } else
1208                                 c = isdn_tty_edit_at(buf, c, info);
1209                 }
1210                 buf += c;
1211                 count -= c;
1212                 total += c;
1213         }
1214         atomic_dec(&info->xmit_lock);
1215         if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1216                 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1217                         isdn_tty_senddown(info);
1218                         isdn_tty_tint(info);
1219                 }
1220                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1221         }
1222         return total;
1223 }
1224
1225 static int
1226 isdn_tty_write_room(struct tty_struct *tty)
1227 {
1228         modem_info *info = (modem_info *) tty->driver_data;
1229         int ret;
1230
1231         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1232                 return 0;
1233         if (!info->online)
1234                 return info->xmit_size;
1235         ret = info->xmit_size - info->xmit_count;
1236         return (ret < 0) ? 0 : ret;
1237 }
1238
1239 static int
1240 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1241 {
1242         modem_info *info = (modem_info *) tty->driver_data;
1243
1244         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1245                 return 0;
1246         if (!info->online)
1247                 return 0;
1248         return (info->xmit_count);
1249 }
1250
1251 static void
1252 isdn_tty_flush_buffer(struct tty_struct *tty)
1253 {
1254         modem_info *info;
1255
1256         if (!tty) {
1257                 return;
1258         }
1259         info = (modem_info *) tty->driver_data;
1260         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1261                 return;
1262         }
1263         isdn_tty_cleanup_xmit(info);
1264         info->xmit_count = 0;
1265         tty_wakeup(tty);
1266 }
1267
1268 static void
1269 isdn_tty_flush_chars(struct tty_struct *tty)
1270 {
1271         modem_info *info = (modem_info *) tty->driver_data;
1272
1273         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1274                 return;
1275         if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1276                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1277 }
1278
1279 /*
1280  * ------------------------------------------------------------
1281  * isdn_tty_throttle()
1282  *
1283  * This routine is called by the upper-layer tty layer to signal that
1284  * incoming characters should be throttled.
1285  * ------------------------------------------------------------
1286  */
1287 static void
1288 isdn_tty_throttle(struct tty_struct *tty)
1289 {
1290         modem_info *info = (modem_info *) tty->driver_data;
1291
1292         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1293                 return;
1294         if (I_IXOFF(tty))
1295                 info->x_char = STOP_CHAR(tty);
1296         info->mcr &= ~UART_MCR_RTS;
1297 }
1298
1299 static void
1300 isdn_tty_unthrottle(struct tty_struct *tty)
1301 {
1302         modem_info *info = (modem_info *) tty->driver_data;
1303
1304         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1305                 return;
1306         if (I_IXOFF(tty)) {
1307                 if (info->x_char)
1308                         info->x_char = 0;
1309                 else
1310                         info->x_char = START_CHAR(tty);
1311         }
1312         info->mcr |= UART_MCR_RTS;
1313 }
1314
1315 /*
1316  * ------------------------------------------------------------
1317  * isdn_tty_ioctl() and friends
1318  * ------------------------------------------------------------
1319  */
1320
1321 /*
1322  * isdn_tty_get_lsr_info - get line status register info
1323  *
1324  * Purpose: Let user call ioctl() to get info when the UART physically
1325  *          is emptied.  On bus types like RS485, the transmitter must
1326  *          release the bus after transmitting. This must be done when
1327  *          the transmit shift register is empty, not be done when the
1328  *          transmit holding register is empty.  This functionality
1329  *          allows RS485 driver to be written in user space.
1330  */
1331 static int
1332 isdn_tty_get_lsr_info(modem_info *info, uint __user *value)
1333 {
1334         u_char status;
1335         uint result;
1336
1337         status = info->lsr;
1338         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1339         return put_user(result, value);
1340 }
1341
1342
1343 static int
1344 isdn_tty_tiocmget(struct tty_struct *tty)
1345 {
1346         modem_info *info = (modem_info *) tty->driver_data;
1347         u_char control, status;
1348
1349         if (isdn_tty_paranoia_check(info, tty->name, __func__))
1350                 return -ENODEV;
1351         if (tty_io_error(tty))
1352                 return -EIO;
1353
1354         mutex_lock(&modem_info_mutex);
1355 #ifdef ISDN_DEBUG_MODEM_IOCTL
1356         printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1357 #endif
1358
1359         control = info->mcr;
1360         status = info->msr;
1361         mutex_unlock(&modem_info_mutex);
1362         return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1363                 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1364                 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1365                 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1366                 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1367                 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1368 }
1369
1370 static int
1371 isdn_tty_tiocmset(struct tty_struct *tty,
1372                   unsigned int set, unsigned int clear)
1373 {
1374         modem_info *info = (modem_info *) tty->driver_data;
1375
1376         if (isdn_tty_paranoia_check(info, tty->name, __func__))
1377                 return -ENODEV;
1378         if (tty_io_error(tty))
1379                 return -EIO;
1380
1381 #ifdef ISDN_DEBUG_MODEM_IOCTL
1382         printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1383 #endif
1384
1385         mutex_lock(&modem_info_mutex);
1386         if (set & TIOCM_RTS)
1387                 info->mcr |= UART_MCR_RTS;
1388         if (set & TIOCM_DTR) {
1389                 info->mcr |= UART_MCR_DTR;
1390                 isdn_tty_modem_ncarrier(info);
1391         }
1392
1393         if (clear & TIOCM_RTS)
1394                 info->mcr &= ~UART_MCR_RTS;
1395         if (clear & TIOCM_DTR) {
1396                 info->mcr &= ~UART_MCR_DTR;
1397                 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1398                         isdn_tty_modem_reset_regs(info, 0);
1399 #ifdef ISDN_DEBUG_MODEM_HUP
1400                         printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1401 #endif
1402                         if (info->online)
1403                                 info->ncarrier = 1;
1404                         isdn_tty_modem_hup(info, 1);
1405                 }
1406         }
1407         mutex_unlock(&modem_info_mutex);
1408         return 0;
1409 }
1410
1411 static int
1412 isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg)
1413 {
1414         modem_info *info = (modem_info *) tty->driver_data;
1415         int retval;
1416
1417         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1418                 return -ENODEV;
1419         if (tty_io_error(tty))
1420                 return -EIO;
1421         switch (cmd) {
1422         case TCSBRK:   /* SVID version: non-zero arg --> no break */
1423 #ifdef ISDN_DEBUG_MODEM_IOCTL
1424                 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1425 #endif
1426                 retval = tty_check_change(tty);
1427                 if (retval)
1428                         return retval;
1429                 tty_wait_until_sent(tty, 0);
1430                 return 0;
1431         case TCSBRKP:  /* support for POSIX tcsendbreak() */
1432 #ifdef ISDN_DEBUG_MODEM_IOCTL
1433                 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1434 #endif
1435                 retval = tty_check_change(tty);
1436                 if (retval)
1437                         return retval;
1438                 tty_wait_until_sent(tty, 0);
1439                 return 0;
1440         case TIOCSERGETLSR:     /* Get line status register */
1441 #ifdef ISDN_DEBUG_MODEM_IOCTL
1442                 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1443 #endif
1444                 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1445         default:
1446 #ifdef ISDN_DEBUG_MODEM_IOCTL
1447                 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1448 #endif
1449                 return -ENOIOCTLCMD;
1450         }
1451         return 0;
1452 }
1453
1454 static void
1455 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1456 {
1457         modem_info *info = (modem_info *) tty->driver_data;
1458
1459         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                 setup_timer(&info->nc_timer, isdn_tty_modem_do_ncarrier,
1816                             (unsigned long)info);
1817                 skb_queue_head_init(&info->xmit_queue);
1818 #ifdef CONFIG_ISDN_AUDIO
1819                 skb_queue_head_init(&info->dtmf_queue);
1820 #endif
1821                 info->port.xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5,
1822                                 GFP_KERNEL);
1823                 if (!info->port.xmit_buf) {
1824                         printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1825                         retval = -ENOMEM;
1826                         goto err_unregister;
1827                 }
1828                 /* Make room for T.70 header */
1829                 info->port.xmit_buf += 4;
1830         }
1831         return 0;
1832 err_unregister:
1833         for (i--; i >= 0; i--) {
1834                 info = &m->info[i];
1835 #ifdef CONFIG_ISDN_TTY_FAX
1836                 kfree(info->fax);
1837 #endif
1838                 kfree(info->port.xmit_buf - 4);
1839                 info->port.xmit_buf = NULL;
1840                 tty_port_destroy(&info->port);
1841         }
1842         tty_unregister_driver(m->tty_modem);
1843 err:
1844         put_tty_driver(m->tty_modem);
1845         m->tty_modem = NULL;
1846         return retval;
1847 }
1848
1849 void
1850 isdn_tty_exit(void)
1851 {
1852         modem_info *info;
1853         int i;
1854
1855         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1856                 info = &dev->mdm.info[i];
1857                 isdn_tty_cleanup_xmit(info);
1858 #ifdef CONFIG_ISDN_TTY_FAX
1859                 kfree(info->fax);
1860 #endif
1861                 kfree(info->port.xmit_buf - 4);
1862                 info->port.xmit_buf = NULL;
1863                 tty_port_destroy(&info->port);
1864         }
1865         tty_unregister_driver(dev->mdm.tty_modem);
1866         put_tty_driver(dev->mdm.tty_modem);
1867         dev->mdm.tty_modem = NULL;
1868 }
1869
1870
1871 /*
1872  * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1873  *      match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1874  *      and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1875  */
1876
1877 static int
1878 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1879 {
1880 #ifdef ISDN_DEBUG_MODEM_ICALL
1881         printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1882                emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1883                emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1884 #endif
1885         if (strlen(emu->lmsn)) {
1886                 char *p = emu->lmsn;
1887                 char *q;
1888                 int  tmp;
1889                 int  ret = 0;
1890
1891                 while (1) {
1892                         if ((q = strchr(p, ';')))
1893                                 *q = '\0';
1894                         if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
1895                                 ret = tmp;
1896 #ifdef ISDN_DEBUG_MODEM_ICALL
1897                         printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
1898                                p, isdn_map_eaz2msn(emu->msn, di), tmp);
1899 #endif
1900                         if (q) {
1901                                 *q = ';';
1902                                 p = q;
1903                                 p++;
1904                         }
1905                         if (!tmp)
1906                                 return 0;
1907                         if (!q)
1908                                 break;
1909                 }
1910                 return ret;
1911         } else {
1912                 int tmp;
1913                 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
1914 #ifdef ISDN_DEBUG_MODEM_ICALL
1915                 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
1916                        isdn_map_eaz2msn(emu->msn, di), tmp);
1917 #endif
1918                 return tmp;
1919         }
1920 }
1921
1922 /*
1923  * An incoming call-request has arrived.
1924  * Search the tty-devices for an appropriate device and bind
1925  * it to the ISDN-Channel.
1926  * Return:
1927  *
1928  *  0 = No matching device found.
1929  *  1 = A matching device found.
1930  *  3 = No match found, but eventually would match, if
1931  *      CID is longer.
1932  */
1933 int
1934 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
1935 {
1936         char *eaz;
1937         int i;
1938         int wret;
1939         int idx;
1940         int si1;
1941         int si2;
1942         char *nr;
1943         ulong flags;
1944
1945         if (!setup->phone[0]) {
1946                 nr = "0";
1947                 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
1948         } else
1949                 nr = setup->phone;
1950         si1 = (int) setup->si1;
1951         si2 = (int) setup->si2;
1952         if (!setup->eazmsn[0]) {
1953                 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
1954                 eaz = "0";
1955         } else
1956                 eaz = setup->eazmsn;
1957 #ifdef ISDN_DEBUG_MODEM_ICALL
1958         printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
1959 #endif
1960         wret = 0;
1961         spin_lock_irqsave(&dev->lock, flags);
1962         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1963                 modem_info *info = &dev->mdm.info[i];
1964
1965                 if (info->port.count == 0)
1966                         continue;
1967                 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) &&  /* SI1 is matching */
1968                     (info->emu.mdmreg[REG_SI2] == si2)) {         /* SI2 is matching */
1969                         idx = isdn_dc2minor(di, ch);
1970 #ifdef ISDN_DEBUG_MODEM_ICALL
1971                         printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
1972                         printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
1973                                info->port.flags, info->isdn_driver,
1974                                info->isdn_channel, dev->usage[idx]);
1975 #endif
1976                         if (
1977 #ifndef FIX_FILE_TRANSFER
1978                             tty_port_active(&info->port) &&
1979 #endif
1980                                 (info->isdn_driver == -1) &&
1981                                 (info->isdn_channel == -1) &&
1982                                 (USG_NONE(dev->usage[idx]))) {
1983                                 int matchret;
1984
1985                                 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
1986                                         wret = matchret;
1987                                 if (!matchret) {                  /* EAZ is matching */
1988                                         info->isdn_driver = di;
1989                                         info->isdn_channel = ch;
1990                                         info->drv_index = idx;
1991                                         dev->m_idx[idx] = info->line;
1992                                         dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
1993                                         dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
1994                                         strcpy(dev->num[idx], nr);
1995                                         strcpy(info->emu.cpn, eaz);
1996                                         info->emu.mdmreg[REG_SI1I] = si2bit[si1];
1997                                         info->emu.mdmreg[REG_PLAN] = setup->plan;
1998                                         info->emu.mdmreg[REG_SCREEN] = setup->screen;
1999                                         isdn_info_update();
2000                                         spin_unlock_irqrestore(&dev->lock, flags);
2001                                         printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2002                                                info->line);
2003                                         info->msr |= UART_MSR_RI;
2004                                         isdn_tty_modem_result(RESULT_RING, info);
2005                                         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2006                                         return 1;
2007                                 }
2008                         }
2009                 }
2010         }
2011         spin_unlock_irqrestore(&dev->lock, flags);
2012         printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2013                ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2)) ? "rejected" : "ignored");
2014         return (wret == 2) ? 3 : 0;
2015 }
2016
2017 int
2018 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2019 {
2020         int mi;
2021         modem_info *info;
2022         char *e;
2023
2024         if (i < 0)
2025                 return 0;
2026         if ((mi = dev->m_idx[i]) >= 0) {
2027                 info = &dev->mdm.info[mi];
2028                 switch (c->command) {
2029                 case ISDN_STAT_CINF:
2030                         printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2031                         info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2032                         if (e == (char *)c->parm.num)
2033                                 info->emu.charge = 0;
2034
2035                         break;
2036                 case ISDN_STAT_BSENT:
2037 #ifdef ISDN_TTY_STAT_DEBUG
2038                         printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2039 #endif
2040                         if ((info->isdn_driver == c->driver) &&
2041                             (info->isdn_channel == c->arg)) {
2042                                 info->msr |= UART_MSR_CTS;
2043                                 if (info->send_outstanding)
2044                                         if (!(--info->send_outstanding))
2045                                                 info->lsr |= UART_LSR_TEMT;
2046                                 isdn_tty_tint(info);
2047                                 return 1;
2048                         }
2049                         break;
2050                 case ISDN_STAT_CAUSE:
2051 #ifdef ISDN_TTY_STAT_DEBUG
2052                         printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2053 #endif
2054                         /* Signal cause to tty-device */
2055                         strncpy(info->last_cause, c->parm.num, 5);
2056                         return 1;
2057                 case ISDN_STAT_DISPLAY:
2058 #ifdef ISDN_TTY_STAT_DEBUG
2059                         printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2060 #endif
2061                         /* Signal display to tty-device */
2062                         if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2063                             !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2064                                 isdn_tty_at_cout("\r\n", info);
2065                                 isdn_tty_at_cout("DISPLAY: ", info);
2066                                 isdn_tty_at_cout(c->parm.display, info);
2067                                 isdn_tty_at_cout("\r\n", info);
2068                         }
2069                         return 1;
2070                 case ISDN_STAT_DCONN:
2071 #ifdef ISDN_TTY_STAT_DEBUG
2072                         printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2073 #endif
2074                         if (tty_port_active(&info->port)) {
2075                                 if (info->dialing == 1) {
2076                                         info->dialing = 2;
2077                                         return 1;
2078                                 }
2079                         }
2080                         break;
2081                 case ISDN_STAT_DHUP:
2082 #ifdef ISDN_TTY_STAT_DEBUG
2083                         printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2084 #endif
2085                         if (tty_port_active(&info->port)) {
2086                                 if (info->dialing == 1)
2087                                         isdn_tty_modem_result(RESULT_BUSY, info);
2088                                 if (info->dialing > 1)
2089                                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2090                                 info->dialing = 0;
2091 #ifdef ISDN_DEBUG_MODEM_HUP
2092                                 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2093 #endif
2094                                 isdn_tty_modem_hup(info, 0);
2095                                 return 1;
2096                         }
2097                         break;
2098                 case ISDN_STAT_BCONN:
2099 #ifdef ISDN_TTY_STAT_DEBUG
2100                         printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2101 #endif
2102                         /* Wake up any processes waiting
2103                          * for incoming call of this device when
2104                          * DCD follow the state of incoming carrier
2105                          */
2106                         if (info->port.blocked_open &&
2107                             (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2108                                 wake_up_interruptible(&info->port.open_wait);
2109                         }
2110
2111                         /* Schedule CONNECT-Message to any tty
2112                          * waiting for it and
2113                          * set DCD-bit of its modem-status.
2114                          */
2115                         if (tty_port_active(&info->port) ||
2116                             (info->port.blocked_open &&
2117                              (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2118                                 info->msr |= UART_MSR_DCD;
2119                                 info->emu.charge = 0;
2120                                 if (info->dialing & 0xf)
2121                                         info->last_dir = 1;
2122                                 else
2123                                         info->last_dir = 0;
2124                                 info->dialing = 0;
2125                                 info->rcvsched = 1;
2126                                 if (USG_MODEM(dev->usage[i])) {
2127                                         if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2128                                                 strcpy(info->emu.connmsg, c->parm.num);
2129                                                 isdn_tty_modem_result(RESULT_CONNECT, info);
2130                                         } else
2131                                                 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2132                                 }
2133                                 if (USG_VOICE(dev->usage[i]))
2134                                         isdn_tty_modem_result(RESULT_VCON, info);
2135                                 return 1;
2136                         }
2137                         break;
2138                 case ISDN_STAT_BHUP:
2139 #ifdef ISDN_TTY_STAT_DEBUG
2140                         printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2141 #endif
2142                         if (tty_port_active(&info->port)) {
2143 #ifdef ISDN_DEBUG_MODEM_HUP
2144                                 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2145 #endif
2146                                 isdn_tty_modem_hup(info, 0);
2147                                 return 1;
2148                         }
2149                         break;
2150                 case ISDN_STAT_NODCH:
2151 #ifdef ISDN_TTY_STAT_DEBUG
2152                         printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2153 #endif
2154                         if (tty_port_active(&info->port)) {
2155                                 if (info->dialing) {
2156                                         info->dialing = 0;
2157                                         info->last_l2 = -1;
2158                                         info->last_si = 0;
2159                                         sprintf(info->last_cause, "0000");
2160                                         isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2161                                 }
2162                                 isdn_tty_modem_hup(info, 0);
2163                                 return 1;
2164                         }
2165                         break;
2166                 case ISDN_STAT_UNLOAD:
2167 #ifdef ISDN_TTY_STAT_DEBUG
2168                         printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2169 #endif
2170                         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2171                                 info = &dev->mdm.info[i];
2172                                 if (info->isdn_driver == c->driver) {
2173                                         if (info->online)
2174                                                 isdn_tty_modem_hup(info, 1);
2175                                 }
2176                         }
2177                         return 1;
2178 #ifdef CONFIG_ISDN_TTY_FAX
2179                 case ISDN_STAT_FAXIND:
2180                         if (tty_port_active(&info->port)) {
2181                                 isdn_tty_fax_command(info, c);
2182                         }
2183                         break;
2184 #endif
2185 #ifdef CONFIG_ISDN_AUDIO
2186                 case ISDN_STAT_AUDIO:
2187                         if (tty_port_active(&info->port)) {
2188                                 switch (c->parm.num[0]) {
2189                                 case ISDN_AUDIO_DTMF:
2190                                         if (info->vonline) {
2191                                                 isdn_audio_put_dle_code(info,
2192                                                                         c->parm.num[1]);
2193                                         }
2194                                         break;
2195                                 }
2196                         }
2197                         break;
2198 #endif
2199                 }
2200         }
2201         return 0;
2202 }
2203
2204 /*********************************************************************
2205  Modem-Emulator-Routines
2206 *********************************************************************/
2207
2208 #define cmdchar(c) ((c >= ' ') && (c <= 0x7f))
2209
2210 /*
2211  * Put a message from the AT-emulator into receive-buffer of tty,
2212  * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2213  */
2214 void
2215 isdn_tty_at_cout(char *msg, modem_info *info)
2216 {
2217         struct tty_port *port = &info->port;
2218         atemu *m = &info->emu;
2219         char *p;
2220         char c;
2221         u_long flags;
2222         struct sk_buff *skb = NULL;
2223         char *sp = NULL;
2224         int l;
2225
2226         if (!msg) {
2227                 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2228                 return;
2229         }
2230
2231         l = strlen(msg);
2232
2233         spin_lock_irqsave(&info->readlock, flags);
2234         if (info->closing) {
2235                 spin_unlock_irqrestore(&info->readlock, flags);
2236                 return;
2237         }
2238
2239         /* use queue instead of direct, if online and */
2240         /* data is in queue or buffer is full */
2241         if (info->online && ((tty_buffer_request_room(port, l) < l) ||
2242                              !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2243                 skb = alloc_skb(l, GFP_ATOMIC);
2244                 if (!skb) {
2245                         spin_unlock_irqrestore(&info->readlock, flags);
2246                         return;
2247                 }
2248                 sp = skb_put(skb, l);
2249 #ifdef CONFIG_ISDN_AUDIO
2250                 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2251                 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2252 #endif
2253         }
2254
2255         for (p = msg; *p; p++) {
2256                 switch (*p) {
2257                 case '\r':
2258                         c = m->mdmreg[REG_CR];
2259                         break;
2260                 case '\n':
2261                         c = m->mdmreg[REG_LF];
2262                         break;
2263                 case '\b':
2264                         c = m->mdmreg[REG_BS];
2265                         break;
2266                 default:
2267                         c = *p;
2268                 }
2269                 if (skb) {
2270                         *sp++ = c;
2271                 } else {
2272                         if (tty_insert_flip_char(port, c, TTY_NORMAL) == 0)
2273                                 break;
2274                 }
2275         }
2276         if (skb) {
2277                 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2278                 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2279                 spin_unlock_irqrestore(&info->readlock, flags);
2280                 /* Schedule dequeuing */
2281                 if (dev->modempoll && info->rcvsched)
2282                         isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2283
2284         } else {
2285                 spin_unlock_irqrestore(&info->readlock, flags);
2286                 tty_flip_buffer_push(port);
2287         }
2288 }
2289
2290 /*
2291  * Perform ATH Hangup
2292  */
2293 static void
2294 isdn_tty_on_hook(modem_info *info)
2295 {
2296         if (info->isdn_channel >= 0) {
2297 #ifdef ISDN_DEBUG_MODEM_HUP
2298                 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2299 #endif
2300                 isdn_tty_modem_hup(info, 1);
2301         }
2302 }
2303
2304 static void
2305 isdn_tty_off_hook(void)
2306 {
2307         printk(KERN_DEBUG "isdn_tty_off_hook\n");
2308 }
2309
2310 #define PLUSWAIT1 (HZ / 2)      /* 0.5 sec. */
2311 #define PLUSWAIT2 (HZ * 3 / 2)  /* 1.5 sec */
2312
2313 /*
2314  * Check Buffer for Modem-escape-sequence, activate timer-callback to
2315  * isdn_tty_modem_escape() if sequence found.
2316  *
2317  * Parameters:
2318  *   p          pointer to databuffer
2319  *   plus       escape-character
2320  *   count      length of buffer
2321  *   pluscount  count of valid escape-characters so far
2322  *   lastplus   timestamp of last character
2323  */
2324 static void
2325 isdn_tty_check_esc(const u_char *p, u_char plus, int count, int *pluscount,
2326                    u_long *lastplus)
2327 {
2328         if (plus > 127)
2329                 return;
2330         if (count > 3) {
2331                 p += count - 3;
2332                 count = 3;
2333                 *pluscount = 0;
2334         }
2335         while (count > 0) {
2336                 if (*(p++) == plus) {
2337                         if ((*pluscount)++) {
2338                                 /* Time since last '+' > 0.5 sec. ? */
2339                                 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2340                                         *pluscount = 1;
2341                         } else {
2342                                 /* Time since last non-'+' < 1.5 sec. ? */
2343                                 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2344                                         *pluscount = 0;
2345                         }
2346                         if ((*pluscount == 3) && (count == 1))
2347                                 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2348                         if (*pluscount > 3)
2349                                 *pluscount = 1;
2350                 } else
2351                         *pluscount = 0;
2352                 *lastplus = jiffies;
2353                 count--;
2354         }
2355 }
2356
2357 /*
2358  * Return result of AT-emulator to tty-receive-buffer, depending on
2359  * modem-register 12, bit 0 and 1.
2360  * For CONNECT-messages also switch to online-mode.
2361  * For RING-message handle auto-ATA if register 0 != 0
2362  */
2363
2364 static void
2365 isdn_tty_modem_result(int code, modem_info *info)
2366 {
2367         atemu *m = &info->emu;
2368         static char *msg[] =
2369                 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2370                  "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2371                  "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2372         char s[ISDN_MSNLEN + 10];
2373
2374         switch (code) {
2375         case RESULT_RING:
2376                 m->mdmreg[REG_RINGCNT]++;
2377                 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2378                         /* Automatically accept incoming call */
2379                         isdn_tty_cmd_ATA(info);
2380                 break;
2381         case RESULT_NO_CARRIER:
2382 #ifdef ISDN_DEBUG_MODEM_HUP
2383                 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2384                        info->closing, !info->port.tty);
2385 #endif
2386                 m->mdmreg[REG_RINGCNT] = 0;
2387                 del_timer(&info->nc_timer);
2388                 info->ncarrier = 0;
2389                 if (info->closing || !info->port.tty)
2390                         return;
2391
2392 #ifdef CONFIG_ISDN_AUDIO
2393                 if (info->vonline & 1) {
2394 #ifdef ISDN_DEBUG_MODEM_VOICE
2395                         printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2396                                info->line);
2397 #endif
2398                         /* voice-recording, add DLE-ETX */
2399                         isdn_tty_at_cout("\020\003", info);
2400                 }
2401                 if (info->vonline & 2) {
2402 #ifdef ISDN_DEBUG_MODEM_VOICE
2403                         printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2404                                info->line);
2405 #endif
2406                         /* voice-playing, add DLE-DC4 */
2407                         isdn_tty_at_cout("\020\024", info);
2408                 }
2409 #endif
2410                 break;
2411         case RESULT_CONNECT:
2412         case RESULT_CONNECT64000:
2413                 sprintf(info->last_cause, "0000");
2414                 if (!info->online)
2415                         info->online = 2;
2416                 break;
2417         case RESULT_VCON:
2418 #ifdef ISDN_DEBUG_MODEM_VOICE
2419                 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2420                        info->line);
2421 #endif
2422                 sprintf(info->last_cause, "0000");
2423                 if (!info->online)
2424                         info->online = 1;
2425                 break;
2426         } /* switch (code) */
2427
2428         if (m->mdmreg[REG_RESP] & BIT_RESP) {
2429                 /* Show results */
2430                 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2431                         /* Show numeric results only */
2432                         sprintf(s, "\r\n%d\r\n", code);
2433                         isdn_tty_at_cout(s, info);
2434                 } else {
2435                         if (code == RESULT_RING) {
2436                                 /* return if "show RUNG" and ringcounter>1 */
2437                                 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2438                                     (m->mdmreg[REG_RINGCNT] > 1))
2439                                         return;
2440                                 /* print CID, _before_ _every_ ring */
2441                                 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2442                                         isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2443                                         isdn_tty_at_cout(dev->num[info->drv_index], info);
2444                                         if (m->mdmreg[REG_CDN] & BIT_CDN) {
2445                                                 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2446                                                 isdn_tty_at_cout(info->emu.cpn, info);
2447                                         }
2448                                 }
2449                         }
2450                         isdn_tty_at_cout("\r\n", info);
2451                         isdn_tty_at_cout(msg[code], info);
2452                         switch (code) {
2453                         case RESULT_CONNECT:
2454                                 switch (m->mdmreg[REG_L2PROT]) {
2455                                 case ISDN_PROTO_L2_MODEM:
2456                                         isdn_tty_at_cout(" ", info);
2457                                         isdn_tty_at_cout(m->connmsg, info);
2458                                         break;
2459                                 }
2460                                 break;
2461                         case RESULT_RING:
2462                                 /* Append CPN, if enabled */
2463                                 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2464                                         sprintf(s, "/%s", m->cpn);
2465                                         isdn_tty_at_cout(s, info);
2466                                 }
2467                                 /* Print CID only once, _after_ 1st RING */
2468                                 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2469                                     (m->mdmreg[REG_RINGCNT] == 1)) {
2470                                         isdn_tty_at_cout("\r\n", info);
2471                                         isdn_tty_at_cout("CALLER NUMBER: ", info);
2472                                         isdn_tty_at_cout(dev->num[info->drv_index], info);
2473                                         if (m->mdmreg[REG_CDN] & BIT_CDN) {
2474                                                 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2475                                                 isdn_tty_at_cout(info->emu.cpn, info);
2476                                         }
2477                                 }
2478                                 break;
2479                         case RESULT_NO_CARRIER:
2480                         case RESULT_NO_DIALTONE:
2481                         case RESULT_BUSY:
2482                         case RESULT_NO_ANSWER:
2483                                 m->mdmreg[REG_RINGCNT] = 0;
2484                                 /* Append Cause-Message if enabled */
2485                                 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2486                                         sprintf(s, "/%s", info->last_cause);
2487                                         isdn_tty_at_cout(s, info);
2488                                 }
2489                                 break;
2490                         case RESULT_CONNECT64000:
2491                                 /* Append Protocol to CONNECT message */
2492                                 switch (m->mdmreg[REG_L2PROT]) {
2493                                 case ISDN_PROTO_L2_X75I:
2494                                 case ISDN_PROTO_L2_X75UI:
2495                                 case ISDN_PROTO_L2_X75BUI:
2496                                         isdn_tty_at_cout("/X.75", info);
2497                                         break;
2498                                 case ISDN_PROTO_L2_HDLC:
2499                                         isdn_tty_at_cout("/HDLC", info);
2500                                         break;
2501                                 case ISDN_PROTO_L2_V11096:
2502                                         isdn_tty_at_cout("/V110/9600", info);
2503                                         break;
2504                                 case ISDN_PROTO_L2_V11019:
2505                                         isdn_tty_at_cout("/V110/19200", info);
2506                                         break;
2507                                 case ISDN_PROTO_L2_V11038:
2508                                         isdn_tty_at_cout("/V110/38400", info);
2509                                         break;
2510                                 }
2511                                 if (m->mdmreg[REG_T70] & BIT_T70) {
2512                                         isdn_tty_at_cout("/T.70", info);
2513                                         if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2514                                                 isdn_tty_at_cout("+", info);
2515                                 }
2516                                 break;
2517                         }
2518                         isdn_tty_at_cout("\r\n", info);
2519                 }
2520         }
2521         if (code == RESULT_NO_CARRIER) {
2522                 if (info->closing || (!info->port.tty))
2523                         return;
2524
2525                 if (tty_port_check_carrier(&info->port))
2526                         tty_hangup(info->port.tty);
2527         }
2528 }
2529
2530
2531 /*
2532  * Display a modem-register-value.
2533  */
2534 static void
2535 isdn_tty_show_profile(int ridx, modem_info *info)
2536 {
2537         char v[6];
2538
2539         sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2540         isdn_tty_at_cout(v, info);
2541 }
2542
2543 /*
2544  * Get MSN-string from char-pointer, set pointer to end of number
2545  */
2546 static void
2547 isdn_tty_get_msnstr(char *n, char **p)
2548 {
2549         int limit = ISDN_MSNLEN - 1;
2550
2551         while (((*p[0] >= '0' && *p[0] <= '9') ||
2552                 /* Why a comma ??? */
2553                 (*p[0] == ',') || (*p[0] == ':')) &&
2554                (limit--))
2555                 *n++ = *p[0]++;
2556         *n = '\0';
2557 }
2558
2559 /*
2560  * Get phone-number from modem-commandbuffer
2561  */
2562 static void
2563 isdn_tty_getdial(char *p, char *q, int cnt)
2564 {
2565         int first = 1;
2566         int limit = ISDN_MSNLEN - 1;    /* MUST match the size of interface var to avoid
2567                                            buffer overflow */
2568
2569         while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt > 0) {
2570                 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2571                     ((*p == 'R') && first) ||
2572                     (*p == '*') || (*p == '#')) {
2573                         *q++ = *p;
2574                         limit--;
2575                 }
2576                 if (!limit)
2577                         break;
2578                 p++;
2579                 first = 0;
2580         }
2581         *q = 0;
2582 }
2583
2584 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2585 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2586
2587 static void
2588 isdn_tty_report(modem_info *info)
2589 {
2590         atemu *m = &info->emu;
2591         char s[80];
2592
2593         isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2594         sprintf(s, "    Remote Number:    %s\r\n", info->last_num);
2595         isdn_tty_at_cout(s, info);
2596         sprintf(s, "    Direction:        %s\r\n", info->last_dir ? "outgoing" : "incoming");
2597         isdn_tty_at_cout(s, info);
2598         isdn_tty_at_cout("    Layer-2 Protocol: ", info);
2599         switch (info->last_l2) {
2600         case ISDN_PROTO_L2_X75I:
2601                 isdn_tty_at_cout("X.75i", info);
2602                 break;
2603         case ISDN_PROTO_L2_X75UI:
2604                 isdn_tty_at_cout("X.75ui", info);
2605                 break;
2606         case ISDN_PROTO_L2_X75BUI:
2607                 isdn_tty_at_cout("X.75bui", info);
2608                 break;
2609         case ISDN_PROTO_L2_HDLC:
2610                 isdn_tty_at_cout("HDLC", info);
2611                 break;
2612         case ISDN_PROTO_L2_V11096:
2613                 isdn_tty_at_cout("V.110 9600 Baud", info);
2614                 break;
2615         case ISDN_PROTO_L2_V11019:
2616                 isdn_tty_at_cout("V.110 19200 Baud", info);
2617                 break;
2618         case ISDN_PROTO_L2_V11038:
2619                 isdn_tty_at_cout("V.110 38400 Baud", info);
2620                 break;
2621         case ISDN_PROTO_L2_TRANS:
2622                 isdn_tty_at_cout("transparent", info);
2623                 break;
2624         case ISDN_PROTO_L2_MODEM:
2625                 isdn_tty_at_cout("modem", info);
2626                 break;
2627         case ISDN_PROTO_L2_FAX:
2628                 isdn_tty_at_cout("fax", info);
2629                 break;
2630         default:
2631                 isdn_tty_at_cout("unknown", info);
2632                 break;
2633         }
2634         if (m->mdmreg[REG_T70] & BIT_T70) {
2635                 isdn_tty_at_cout("/T.70", info);
2636                 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2637                         isdn_tty_at_cout("+", info);
2638         }
2639         isdn_tty_at_cout("\r\n", info);
2640         isdn_tty_at_cout("    Service:          ", info);
2641         switch (info->last_si) {
2642         case 1:
2643                 isdn_tty_at_cout("audio\r\n", info);
2644                 break;
2645         case 5:
2646                 isdn_tty_at_cout("btx\r\n", info);
2647                 break;
2648         case 7:
2649                 isdn_tty_at_cout("data\r\n", info);
2650                 break;
2651         default:
2652                 sprintf(s, "%d\r\n", info->last_si);
2653                 isdn_tty_at_cout(s, info);
2654                 break;
2655         }
2656         sprintf(s, "    Hangup location:  %s\r\n", info->last_lhup ? "local" : "remote");
2657         isdn_tty_at_cout(s, info);
2658         sprintf(s, "    Last cause:       %s\r\n", info->last_cause);
2659         isdn_tty_at_cout(s, info);
2660 }
2661
2662 /*
2663  * Parse AT&.. commands.
2664  */
2665 static int
2666 isdn_tty_cmd_ATand(char **p, modem_info *info)
2667 {
2668         atemu *m = &info->emu;
2669         int i;
2670         char rb[100];
2671
2672 #define MAXRB (sizeof(rb) - 1)
2673
2674         switch (*p[0]) {
2675         case 'B':
2676                 /* &B - Set Buffersize */
2677                 p[0]++;
2678                 i = isdn_getnum(p);
2679                 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2680                         PARSE_ERROR1;
2681 #ifdef CONFIG_ISDN_AUDIO
2682                 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2683                         PARSE_ERROR1;
2684 #endif
2685                 m->mdmreg[REG_PSIZE] = i / 16;
2686                 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2687                 switch (m->mdmreg[REG_L2PROT]) {
2688                 case ISDN_PROTO_L2_V11096:
2689                 case ISDN_PROTO_L2_V11019:
2690                 case ISDN_PROTO_L2_V11038:
2691                         info->xmit_size /= 10;
2692                 }
2693                 break;
2694         case 'C':
2695                 /* &C - DCD Status */
2696                 p[0]++;
2697                 switch (isdn_getnum(p)) {
2698                 case 0:
2699                         m->mdmreg[REG_DCD] &= ~BIT_DCD;
2700                         break;
2701                 case 1:
2702                         m->mdmreg[REG_DCD] |= BIT_DCD;
2703                         break;
2704                 default:
2705                         PARSE_ERROR1
2706                                 }
2707                 break;
2708         case 'D':
2709                 /* &D - Set DTR-Low-behavior */
2710                 p[0]++;
2711                 switch (isdn_getnum(p)) {
2712                 case 0:
2713                         m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2714                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2715                         break;
2716                 case 2:
2717                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2718                         m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2719                         break;
2720                 case 3:
2721                         m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2722                         m->mdmreg[REG_DTRR] |= BIT_DTRR;
2723                         break;
2724                 default:
2725                         PARSE_ERROR1
2726                                 }
2727                 break;
2728         case 'E':
2729                 /* &E -Set EAZ/MSN */
2730                 p[0]++;
2731                 isdn_tty_get_msnstr(m->msn, p);
2732                 break;
2733         case 'F':
2734                 /* &F -Set Factory-Defaults */
2735                 p[0]++;
2736                 if (info->msr & UART_MSR_DCD)
2737                         PARSE_ERROR1;
2738                 isdn_tty_reset_profile(m);
2739                 isdn_tty_modem_reset_regs(info, 1);
2740                 break;
2741 #ifdef DUMMY_HAYES_AT
2742         case 'K':
2743                 /* only for be compilant with common scripts */
2744                 /* &K Flowcontrol - no function */
2745                 p[0]++;
2746                 isdn_getnum(p);
2747                 break;
2748 #endif
2749         case 'L':
2750                 /* &L -Set Numbers to listen on */
2751                 p[0]++;
2752                 i = 0;
2753                 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2754                        (i < ISDN_LMSNLEN - 1))
2755                         m->lmsn[i++] = *p[0]++;
2756                 m->lmsn[i] = '\0';
2757                 break;
2758         case 'R':
2759                 /* &R - Set V.110 bitrate adaption */
2760                 p[0]++;
2761                 i = isdn_getnum(p);
2762                 switch (i) {
2763                 case 0:
2764                         /* Switch off V.110, back to X.75 */
2765                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2766                         m->mdmreg[REG_SI2] = 0;
2767                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2768                         break;
2769                 case 9600:
2770                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2771                         m->mdmreg[REG_SI2] = 197;
2772                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2773                         break;
2774                 case 19200:
2775                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2776                         m->mdmreg[REG_SI2] = 199;
2777                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2778                         break;
2779                 case 38400:
2780                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2781                         m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2782                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2783                         break;
2784                 default:
2785                         PARSE_ERROR1;
2786                 }
2787                 /* Switch off T.70 */
2788                 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2789                 /* Set Service 7 */
2790                 m->mdmreg[REG_SI1] |= 4;
2791                 break;
2792         case 'S':
2793                 /* &S - Set Windowsize */
2794                 p[0]++;
2795                 i = isdn_getnum(p);
2796                 if ((i > 0) && (i < 9))
2797                         m->mdmreg[REG_WSIZE] = i;
2798                 else
2799                         PARSE_ERROR1;
2800                 break;
2801         case 'V':
2802                 /* &V - Show registers */
2803                 p[0]++;
2804                 isdn_tty_at_cout("\r\n", info);
2805                 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2806                         sprintf(rb, "S%02d=%03d%s", i,
2807                                 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2808                         isdn_tty_at_cout(rb, info);
2809                 }
2810                 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2811                         strlen(m->msn) ? m->msn : "None");
2812                 isdn_tty_at_cout(rb, info);
2813                 if (strlen(m->lmsn)) {
2814                         isdn_tty_at_cout("\r\nListen: ", info);
2815                         isdn_tty_at_cout(m->lmsn, info);
2816                         isdn_tty_at_cout("\r\n", info);
2817                 }
2818                 break;
2819         case 'W':
2820                 /* &W - Write Profile */
2821                 p[0]++;
2822                 switch (*p[0]) {
2823                 case '0':
2824                         p[0]++;
2825                         modem_write_profile(m);
2826                         break;
2827                 default:
2828                         PARSE_ERROR1;
2829                 }
2830                 break;
2831         case 'X':
2832                 /* &X - Switch to BTX-Mode and T.70 */
2833                 p[0]++;
2834                 switch (isdn_getnum(p)) {
2835                 case 0:
2836                         m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2837                         info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2838                         break;
2839                 case 1:
2840                         m->mdmreg[REG_T70] |= BIT_T70;
2841                         m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2842                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2843                         info->xmit_size = 112;
2844                         m->mdmreg[REG_SI1] = 4;
2845                         m->mdmreg[REG_SI2] = 0;
2846                         break;
2847                 case 2:
2848                         m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2849                         m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2850                         info->xmit_size = 112;
2851                         m->mdmreg[REG_SI1] = 4;
2852                         m->mdmreg[REG_SI2] = 0;
2853                         break;
2854                 default:
2855                         PARSE_ERROR1;
2856                 }
2857                 break;
2858         default:
2859                 PARSE_ERROR1;
2860         }
2861         return 0;
2862 }
2863
2864 static int
2865 isdn_tty_check_ats(int mreg, int mval, modem_info *info, atemu *m)
2866 {
2867         /* Some plausibility checks */
2868         switch (mreg) {
2869         case REG_L2PROT:
2870                 if (mval > ISDN_PROTO_L2_MAX)
2871                         return 1;
2872                 break;
2873         case REG_PSIZE:
2874                 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2875                         return 1;
2876 #ifdef CONFIG_ISDN_AUDIO
2877                 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
2878                         return 1;
2879 #endif
2880                 info->xmit_size = mval * 16;
2881                 switch (m->mdmreg[REG_L2PROT]) {
2882                 case ISDN_PROTO_L2_V11096:
2883                 case ISDN_PROTO_L2_V11019:
2884                 case ISDN_PROTO_L2_V11038:
2885                         info->xmit_size /= 10;
2886                 }
2887                 break;
2888         case REG_SI1I:
2889         case REG_PLAN:
2890         case REG_SCREEN:
2891                 /* readonly registers */
2892                 return 1;
2893         }
2894         return 0;
2895 }
2896
2897 /*
2898  * Perform ATS command
2899  */
2900 static int
2901 isdn_tty_cmd_ATS(char **p, modem_info *info)
2902 {
2903         atemu *m = &info->emu;
2904         int bitpos;
2905         int mreg;
2906         int mval;
2907         int bval;
2908
2909         mreg = isdn_getnum(p);
2910         if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
2911                 PARSE_ERROR1;
2912         switch (*p[0]) {
2913         case '=':
2914                 p[0]++;
2915                 mval = isdn_getnum(p);
2916                 if (mval < 0 || mval > 255)
2917                         PARSE_ERROR1;
2918                 if (isdn_tty_check_ats(mreg, mval, info, m))
2919                         PARSE_ERROR1;
2920                 m->mdmreg[mreg] = mval;
2921                 break;
2922         case '.':
2923                 /* Set/Clear a single bit */
2924                 p[0]++;
2925                 bitpos = isdn_getnum(p);
2926                 if ((bitpos < 0) || (bitpos > 7))
2927                         PARSE_ERROR1;
2928                 switch (*p[0]) {
2929                 case '=':
2930                         p[0]++;
2931                         bval = isdn_getnum(p);
2932                         if (bval < 0 || bval > 1)
2933                                 PARSE_ERROR1;
2934                         if (bval)
2935                                 mval = m->mdmreg[mreg] | (1 << bitpos);
2936                         else
2937                                 mval = m->mdmreg[mreg] & ~(1 << bitpos);
2938                         if (isdn_tty_check_ats(mreg, mval, info, m))
2939                                 PARSE_ERROR1;
2940                         m->mdmreg[mreg] = mval;
2941                         break;
2942                 case '?':
2943                         p[0]++;
2944                         isdn_tty_at_cout("\r\n", info);
2945                         isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
2946                                          info);
2947                         break;
2948                 default:
2949                         PARSE_ERROR1;
2950                 }
2951                 break;
2952         case '?':
2953                 p[0]++;
2954                 isdn_tty_show_profile(mreg, info);
2955                 break;
2956         default:
2957                 PARSE_ERROR1;
2958                 break;
2959         }
2960         return 0;
2961 }
2962
2963 /*
2964  * Perform ATA command
2965  */
2966 static void
2967 isdn_tty_cmd_ATA(modem_info *info)
2968 {
2969         atemu *m = &info->emu;
2970         isdn_ctrl cmd;
2971         int l2;
2972
2973         if (info->msr & UART_MSR_RI) {
2974                 /* Accept incoming call */
2975                 info->last_dir = 0;
2976                 strcpy(info->last_num, dev->num[info->drv_index]);
2977                 m->mdmreg[REG_RINGCNT] = 0;
2978                 info->msr &= ~UART_MSR_RI;
2979                 l2 = m->mdmreg[REG_L2PROT];
2980 #ifdef CONFIG_ISDN_AUDIO
2981                 /* If more than one bit set in reg18, autoselect Layer2 */
2982                 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
2983                         if (m->mdmreg[REG_SI1I] == 1) {
2984                                 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
2985                                         l2 = ISDN_PROTO_L2_TRANS;
2986                         } else
2987                                 l2 = ISDN_PROTO_L2_X75I;
2988                 }
2989 #endif
2990                 cmd.driver = info->isdn_driver;
2991                 cmd.command = ISDN_CMD_SETL2;
2992                 cmd.arg = info->isdn_channel + (l2 << 8);
2993                 info->last_l2 = l2;
2994                 isdn_command(&cmd);
2995                 cmd.driver = info->isdn_driver;
2996                 cmd.command = ISDN_CMD_SETL3;
2997                 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
2998 #ifdef CONFIG_ISDN_TTY_FAX
2999                 if (l2 == ISDN_PROTO_L2_FAX) {
3000                         cmd.parm.fax = info->fax;
3001                         info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3002                 }
3003 #endif
3004                 isdn_command(&cmd);
3005                 cmd.driver = info->isdn_driver;
3006                 cmd.arg = info->isdn_channel;
3007                 cmd.command = ISDN_CMD_ACCEPTD;
3008                 info->dialing = 16;
3009                 info->emu.carrierwait = 0;
3010                 isdn_command(&cmd);
3011                 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3012         } else
3013                 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3014 }
3015
3016 #ifdef CONFIG_ISDN_AUDIO
3017 /*
3018  * Parse AT+F.. commands
3019  */
3020 static int
3021 isdn_tty_cmd_PLUSF(char **p, modem_info *info)
3022 {
3023         atemu *m = &info->emu;
3024         char rs[20];
3025
3026         if (!strncmp(p[0], "CLASS", 5)) {
3027                 p[0] += 5;
3028                 switch (*p[0]) {
3029                 case '?':
3030                         p[0]++;
3031                         sprintf(rs, "\r\n%d",
3032                                 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3033 #ifdef CONFIG_ISDN_TTY_FAX
3034                         if (TTY_IS_FCLASS2(info))
3035                                 sprintf(rs, "\r\n2");
3036                         else if (TTY_IS_FCLASS1(info))
3037                                 sprintf(rs, "\r\n1");
3038 #endif
3039                         isdn_tty_at_cout(rs, info);
3040                         break;
3041                 case '=':
3042                         p[0]++;
3043                         switch (*p[0]) {
3044                         case '0':
3045                                 p[0]++;
3046                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3047                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3048                                 m->mdmreg[REG_SI1] = 4;
3049                                 info->xmit_size =
3050                                         m->mdmreg[REG_PSIZE] * 16;
3051                                 break;
3052 #ifdef CONFIG_ISDN_TTY_FAX
3053                         case '1':
3054                                 p[0]++;
3055                                 if (!(dev->global_features &
3056                                       ISDN_FEATURE_L3_FCLASS1))
3057                                         PARSE_ERROR1;
3058                                 m->mdmreg[REG_SI1] = 1;
3059                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3060                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3061                                 info->xmit_size =
3062                                         m->mdmreg[REG_PSIZE] * 16;
3063                                 break;
3064                         case '2':
3065                                 p[0]++;
3066                                 if (!(dev->global_features &
3067                                       ISDN_FEATURE_L3_FCLASS2))
3068                                         PARSE_ERROR1;
3069                                 m->mdmreg[REG_SI1] = 1;
3070                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3071                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3072                                 info->xmit_size =
3073                                         m->mdmreg[REG_PSIZE] * 16;
3074                                 break;
3075 #endif
3076                         case '8':
3077                                 p[0]++;
3078                                 /* L2 will change on dialout with si=1 */
3079                                 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3080                                 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3081                                 m->mdmreg[REG_SI1] = 5;
3082                                 info->xmit_size = VBUF;
3083                                 break;
3084                         case '?':
3085                                 p[0]++;
3086                                 strcpy(rs, "\r\n0,");
3087 #ifdef CONFIG_ISDN_TTY_FAX
3088                                 if (dev->global_features &
3089                                     ISDN_FEATURE_L3_FCLASS1)
3090                                         strcat(rs, "1,");
3091                                 if (dev->global_features &
3092                                     ISDN_FEATURE_L3_FCLASS2)
3093                                         strcat(rs, "2,");
3094 #endif
3095                                 strcat(rs, "8");
3096                                 isdn_tty_at_cout(rs, info);
3097                                 break;
3098                         default:
3099                                 PARSE_ERROR1;
3100                         }
3101                         break;
3102                 default:
3103                         PARSE_ERROR1;
3104                 }
3105                 return 0;
3106         }
3107 #ifdef CONFIG_ISDN_TTY_FAX
3108         return (isdn_tty_cmd_PLUSF_FAX(p, info));
3109 #else
3110         PARSE_ERROR1;
3111 #endif
3112 }
3113
3114 /*
3115  * Parse AT+V.. commands
3116  */
3117 static int
3118 isdn_tty_cmd_PLUSV(char **p, modem_info *info)
3119 {
3120         atemu *m = &info->emu;
3121         isdn_ctrl cmd;
3122         static char *vcmd[] =
3123                 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3124         int i;
3125         int par1;
3126         int par2;
3127         char rs[20];
3128
3129         i = 0;
3130         while (vcmd[i]) {
3131                 if (!strncmp(vcmd[i], p[0], 2)) {
3132                         p[0] += 2;
3133                         break;
3134                 }
3135                 i++;
3136         }
3137         switch (i) {
3138         case 0:
3139                 /* AT+VNH - Auto hangup feature */
3140                 switch (*p[0]) {
3141                 case '?':
3142                         p[0]++;
3143                         isdn_tty_at_cout("\r\n1", info);
3144                         break;
3145                 case '=':
3146                         p[0]++;
3147                         switch (*p[0]) {
3148                         case '1':
3149                                 p[0]++;
3150                                 break;
3151                         case '?':
3152                                 p[0]++;
3153                                 isdn_tty_at_cout("\r\n1", info);
3154                                 break;
3155                         default:
3156                                 PARSE_ERROR1;
3157                         }
3158                         break;
3159                 default:
3160                         PARSE_ERROR1;
3161                 }
3162                 break;
3163         case 1:
3164                 /* AT+VIP - Reset all voice parameters */
3165                 isdn_tty_modem_reset_vpar(m);
3166                 break;
3167         case 2:
3168                 /* AT+VLS - Select device, accept incoming call */
3169                 switch (*p[0]) {
3170                 case '?':
3171                         p[0]++;
3172                         sprintf(rs, "\r\n%d", m->vpar[0]);
3173                         isdn_tty_at_cout(rs, info);
3174                         break;
3175                 case '=':
3176                         p[0]++;
3177                         switch (*p[0]) {
3178                         case '0':
3179                                 p[0]++;
3180                                 m->vpar[0] = 0;
3181                                 break;
3182                         case '2':
3183                                 p[0]++;
3184                                 m->vpar[0] = 2;
3185                                 break;
3186                         case '?':
3187                                 p[0]++;
3188                                 isdn_tty_at_cout("\r\n0,2", info);
3189                                 break;
3190                         default:
3191                                 PARSE_ERROR1;
3192                         }
3193                         break;
3194                 default:
3195                         PARSE_ERROR1;
3196                 }
3197                 break;
3198         case 3:
3199                 /* AT+VRX - Start recording */
3200                 if (!m->vpar[0])
3201                         PARSE_ERROR1;
3202                 if (info->online != 1) {
3203                         isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3204                         return 1;
3205                 }
3206                 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3207                 if (!info->dtmf_state) {
3208                         printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3209                         PARSE_ERROR1;
3210                 }
3211                 info->silence_state = isdn_audio_silence_init(info->silence_state);
3212                 if (!info->silence_state) {
3213                         printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3214                         PARSE_ERROR1;
3215                 }
3216                 if (m->vpar[3] < 5) {
3217                         info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3218                         if (!info->adpcmr) {
3219                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3220                                 PARSE_ERROR1;
3221                         }
3222                 }
3223 #ifdef ISDN_DEBUG_AT
3224                 printk(KERN_DEBUG "AT: +VRX\n");
3225 #endif
3226                 info->vonline |= 1;
3227                 isdn_tty_modem_result(RESULT_CONNECT, info);
3228                 return 0;
3229                 break;
3230         case 4:
3231                 /* AT+VSD - Silence detection */
3232                 switch (*p[0]) {
3233                 case '?':
3234                         p[0]++;
3235                         sprintf(rs, "\r\n<%d>,<%d>",
3236                                 m->vpar[1],
3237                                 m->vpar[2]);
3238                         isdn_tty_at_cout(rs, info);
3239                         break;
3240                 case '=':
3241                         p[0]++;
3242                         if ((*p[0] >= '0') && (*p[0] <= '9')) {
3243                                 par1 = isdn_getnum(p);
3244                                 if ((par1 < 0) || (par1 > 31))
3245                                         PARSE_ERROR1;
3246                                 if (*p[0] != ',')
3247                                         PARSE_ERROR1;
3248                                 p[0]++;
3249                                 par2 = isdn_getnum(p);
3250                                 if ((par2 < 0) || (par2 > 255))
3251                                         PARSE_ERROR1;
3252                                 m->vpar[1] = par1;
3253                                 m->vpar[2] = par2;
3254                                 break;
3255                         } else
3256                                 if (*p[0] == '?') {
3257                                         p[0]++;
3258                                         isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3259                                                          info);
3260                                         break;
3261                                 } else
3262                                         PARSE_ERROR1;
3263                         break;
3264                 default:
3265                         PARSE_ERROR1;
3266                 }
3267                 break;
3268         case 5:
3269                 /* AT+VSM - Select compression */
3270                 switch (*p[0]) {
3271                 case '?':
3272                         p[0]++;
3273                         sprintf(rs, "\r\n<%d>,<%d><8000>",
3274                                 m->vpar[3],
3275                                 m->vpar[1]);
3276                         isdn_tty_at_cout(rs, info);
3277                         break;
3278                 case '=':
3279                         p[0]++;
3280                         switch (*p[0]) {
3281                         case '2':
3282                         case '3':
3283                         case '4':
3284                         case '5':
3285                         case '6':
3286                                 par1 = isdn_getnum(p);
3287                                 if ((par1 < 2) || (par1 > 6))
3288                                         PARSE_ERROR1;
3289                                 m->vpar[3] = par1;
3290                                 break;
3291                         case '?':
3292                                 p[0]++;
3293                                 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3294                                                  info);
3295                                 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3296                                                  info);
3297                                 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3298                                                  info);
3299                                 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3300                                                  info);
3301                                 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3302                                                  info);
3303                                 break;
3304                         default:
3305                                 PARSE_ERROR1;
3306                         }
3307                         break;
3308                 default:
3309                         PARSE_ERROR1;
3310                 }
3311                 break;
3312         case 6:
3313                 /* AT+VTX - Start sending */
3314                 if (!m->vpar[0])
3315                         PARSE_ERROR1;
3316                 if (info->online != 1) {
3317                         isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3318                         return 1;
3319                 }
3320                 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3321                 if (!info->dtmf_state) {
3322                         printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3323                         PARSE_ERROR1;
3324                 }
3325                 if (m->vpar[3] < 5) {
3326                         info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3327                         if (!info->adpcms) {
3328                                 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3329                                 PARSE_ERROR1;
3330                         }
3331                 }
3332 #ifdef ISDN_DEBUG_AT
3333                 printk(KERN_DEBUG "AT: +VTX\n");
3334 #endif
3335                 m->lastDLE = 0;
3336                 info->vonline |= 2;
3337                 isdn_tty_modem_result(RESULT_CONNECT, info);
3338                 return 0;
3339                 break;
3340         case 7:
3341                 /* AT+VDD - DTMF detection */
3342                 switch (*p[0]) {
3343                 case '?':
3344                         p[0]++;
3345                         sprintf(rs, "\r\n<%d>,<%d>",
3346                                 m->vpar[4],
3347                                 m->vpar[5]);
3348                         isdn_tty_at_cout(rs, info);
3349                         break;
3350                 case '=':
3351                         p[0]++;
3352                         if ((*p[0] >= '0') && (*p[0] <= '9')) {
3353                                 if (info->online != 1)
3354                                         PARSE_ERROR1;
3355                                 par1 = isdn_getnum(p);
3356                                 if ((par1 < 0) || (par1 > 15))
3357                                         PARSE_ERROR1;
3358                                 if (*p[0] != ',')
3359                                         PARSE_ERROR1;
3360                                 p[0]++;
3361                                 par2 = isdn_getnum(p);
3362                                 if ((par2 < 0) || (par2 > 255))
3363                                         PARSE_ERROR1;
3364                                 m->vpar[4] = par1;
3365                                 m->vpar[5] = par2;
3366                                 cmd.driver = info->isdn_driver;
3367                                 cmd.command = ISDN_CMD_AUDIO;
3368                                 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3369                                 cmd.parm.num[0] = par1;
3370                                 cmd.parm.num[1] = par2;
3371                                 isdn_command(&cmd);
3372                                 break;
3373                         } else
3374                                 if (*p[0] == '?') {
3375                                         p[0]++;
3376                                         isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3377                                                          info);
3378                                         break;
3379                                 } else
3380                                         PARSE_ERROR1;
3381                         break;
3382                 default:
3383                         PARSE_ERROR1;
3384                 }
3385                 break;
3386         default:
3387                 PARSE_ERROR1;
3388         }
3389         return 0;
3390 }
3391 #endif                          /* CONFIG_ISDN_AUDIO */
3392
3393 /*
3394  * Parse and perform an AT-command-line.
3395  */
3396 static void
3397 isdn_tty_parse_at(modem_info *info)
3398 {
3399         atemu *m = &info->emu;
3400         char *p;
3401         char ds[ISDN_MSNLEN];
3402
3403 #ifdef ISDN_DEBUG_AT
3404         printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3405 #endif
3406         for (p = &m->mdmcmd[2]; *p;) {
3407                 switch (*p) {
3408                 case ' ':
3409                         p++;
3410                         break;
3411                 case 'A':
3412                         /* A - Accept incoming call */
3413                         p++;
3414                         isdn_tty_cmd_ATA(info);
3415                         return;
3416                 case 'D':
3417                         /* D - Dial */
3418                         if (info->msr & UART_MSR_DCD)
3419                                 PARSE_ERROR;
3420                         if (info->msr & UART_MSR_RI) {
3421                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3422                                 return;
3423                         }
3424                         isdn_tty_getdial(++p, ds, sizeof ds);
3425                         p += strlen(p);
3426                         if (!strlen(m->msn))
3427                                 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3428                         else if (strlen(ds))
3429                                 isdn_tty_dial(ds, info, m);
3430                         else
3431                                 PARSE_ERROR;
3432                         return;
3433                 case 'E':
3434                         /* E - Turn Echo on/off */
3435                         p++;
3436                         switch (isdn_getnum(&p)) {
3437                         case 0:
3438                                 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3439                                 break;
3440                         case 1:
3441                                 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3442                                 break;
3443                         default:
3444                                 PARSE_ERROR;
3445                         }
3446                         break;
3447                 case 'H':
3448                         /* H - On/Off-hook */
3449                         p++;
3450                         switch (*p) {
3451                         case '0':
3452                                 p++;
3453                                 isdn_tty_on_hook(info);
3454                                 break;
3455                         case '1':
3456                                 p++;
3457                                 isdn_tty_off_hook();
3458                                 break;
3459                         default:
3460                                 isdn_tty_on_hook(info);
3461                                 break;
3462                         }
3463                         break;
3464                 case 'I':
3465                         /* I - Information */
3466                         p++;
3467                         isdn_tty_at_cout("\r\nLinux ISDN", info);
3468                         switch (*p) {
3469                         case '0':
3470                         case '1':
3471                                 p++;
3472                                 break;
3473                         case '2':
3474                                 p++;
3475                                 isdn_tty_report(info);
3476                                 break;
3477                         case '3':
3478                                 p++;
3479                                 snprintf(ds, sizeof(ds), "\r\n%d", info->emu.charge);
3480                                 isdn_tty_at_cout(ds, info);
3481                                 break;
3482                         default:;
3483                         }
3484                         break;
3485 #ifdef DUMMY_HAYES_AT
3486                 case 'L':
3487                 case 'M':
3488                         /* only for be compilant with common scripts */
3489                         /* no function */
3490                         p++;
3491                         isdn_getnum(&p);
3492                         break;
3493 #endif
3494                 case 'O':
3495                         /* O - Go online */
3496                         p++;
3497                         if (info->msr & UART_MSR_DCD)
3498                                 /* if B-Channel is up */
3499                                 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT : RESULT_CONNECT64000, info);
3500                         else
3501                                 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3502                         return;
3503                 case 'Q':
3504                         /* Q - Turn Emulator messages on/off */
3505                         p++;
3506                         switch (isdn_getnum(&p)) {
3507                         case 0:
3508                                 m->mdmreg[REG_RESP] |= BIT_RESP;
3509                                 break;
3510                         case 1:
3511                                 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3512                                 break;
3513                         default:
3514                                 PARSE_ERROR;
3515                         }
3516                         break;
3517                 case 'S':
3518                         /* S - Set/Get Register */
3519                         p++;
3520                         if (isdn_tty_cmd_ATS(&p, info))
3521                                 return;
3522                         break;
3523                 case 'V':
3524                         /* V - Numeric or ASCII Emulator-messages */
3525                         p++;
3526                         switch (isdn_getnum(&p)) {
3527                         case 0:
3528                                 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3529                                 break;
3530                         case 1:
3531                                 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3532                                 break;
3533                         default:
3534                                 PARSE_ERROR;
3535                         }
3536                         break;
3537                 case 'Z':
3538                         /* Z - Load Registers from Profile */
3539                         p++;
3540                         if (info->msr & UART_MSR_DCD) {
3541                                 info->online = 0;
3542                                 isdn_tty_on_hook(info);
3543                         }
3544                         isdn_tty_modem_reset_regs(info, 1);
3545                         break;
3546                 case '+':
3547                         p++;
3548                         switch (*p) {
3549 #ifdef CONFIG_ISDN_AUDIO
3550                         case 'F':
3551                                 p++;
3552                                 if (isdn_tty_cmd_PLUSF(&p, info))
3553                                         return;
3554                                 break;
3555                         case 'V':
3556                                 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3557                                     (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3558                                         PARSE_ERROR;
3559                                 p++;
3560                                 if (isdn_tty_cmd_PLUSV(&p, info))
3561                                         return;
3562                                 break;
3563 #endif                          /* CONFIG_ISDN_AUDIO */
3564                         case 'S':       /* SUSPEND */
3565                                 p++;
3566                                 isdn_tty_get_msnstr(ds, &p);
3567                                 isdn_tty_suspend(ds, info, m);
3568                                 break;
3569                         case 'R':       /* RESUME */
3570                                 p++;
3571                                 isdn_tty_get_msnstr(ds, &p);
3572                                 isdn_tty_resume(ds, info, m);
3573                                 break;
3574                         case 'M':       /* MESSAGE */
3575                                 p++;
3576                                 isdn_tty_send_msg(info, m, p);
3577                                 break;
3578                         default:
3579                                 PARSE_ERROR;
3580                         }
3581                         break;
3582                 case '&':
3583                         p++;
3584                         if (isdn_tty_cmd_ATand(&p, info))
3585                                 return;
3586                         break;
3587                 default:
3588                         PARSE_ERROR;
3589                 }
3590         }
3591 #ifdef CONFIG_ISDN_AUDIO
3592         if (!info->vonline)
3593 #endif
3594                 isdn_tty_modem_result(RESULT_OK, info);
3595 }
3596
3597 /* Need own toupper() because standard-toupper is not available
3598  * within modules.
3599  */
3600 #define my_toupper(c) (((c >= 'a') && (c <= 'z')) ? (c & 0xdf) : c)
3601
3602 /*
3603  * Perform line-editing of AT-commands
3604  *
3605  * Parameters:
3606  *   p        inputbuffer
3607  *   count    length of buffer
3608  *   channel  index to line (minor-device)
3609  */
3610 static int
3611 isdn_tty_edit_at(const char *p, int count, modem_info *info)
3612 {
3613         atemu *m = &info->emu;
3614         int total = 0;
3615         u_char c;
3616         char eb[2];
3617         int cnt;
3618
3619         for (cnt = count; cnt > 0; p++, cnt--) {
3620                 c = *p;
3621                 total++;
3622                 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3623                         /* Separator (CR or LF) */
3624                         m->mdmcmd[m->mdmcmdl] = 0;
3625                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3626                                 eb[0] = c;
3627                                 eb[1] = 0;
3628                                 isdn_tty_at_cout(eb, info);
3629                         }
3630                         if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3631                                 isdn_tty_parse_at(info);
3632                         m->mdmcmdl = 0;
3633                         continue;
3634                 }
3635                 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3636                         /* Backspace-Function */
3637                         if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3638                                 if (m->mdmcmdl)
3639                                         m->mdmcmdl--;
3640                                 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3641                                         isdn_tty_at_cout("\b", info);
3642                         }
3643                         continue;
3644                 }
3645                 if (cmdchar(c)) {
3646                         if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3647                                 eb[0] = c;
3648                                 eb[1] = 0;
3649                                 isdn_tty_at_cout(eb, info);
3650                         }
3651                         if (m->mdmcmdl < 255) {
3652                                 c = my_toupper(c);
3653                                 switch (m->mdmcmdl) {
3654                                 case 1:
3655                                         if (c == 'T') {
3656                                                 m->mdmcmd[m->mdmcmdl] = c;
3657                                                 m->mdmcmd[++m->mdmcmdl] = 0;
3658                                                 break;
3659                                         } else
3660                                                 m->mdmcmdl = 0;
3661                                         /* Fall through, check for 'A' */
3662                                 case 0:
3663                                         if (c == 'A') {
3664                                                 m->mdmcmd[m->mdmcmdl] = c;
3665                                                 m->mdmcmd[++m->mdmcmdl] = 0;
3666                                         }
3667                                         break;
3668                                 default:
3669                                         m->mdmcmd[m->mdmcmdl] = c;
3670                                         m->mdmcmd[++m->mdmcmdl] = 0;
3671                                 }
3672                         }
3673                 }
3674         }
3675         return total;
3676 }
3677
3678 /*
3679  * Switch all modem-channels who are online and got a valid
3680  * escape-sequence 1.5 seconds ago, to command-mode.
3681  * This function is called every second via timer-interrupt from within
3682  * timer-dispatcher isdn_timer_function()
3683  */
3684 void
3685 isdn_tty_modem_escape(void)
3686 {
3687         int ton = 0;
3688         int i;
3689         int midx;
3690
3691         for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3692                 if (USG_MODEM(dev->usage[i]) && (midx = dev->m_idx[i]) >= 0) {
3693                         modem_info *info = &dev->mdm.info[midx];
3694                         if (info->online) {
3695                                 ton = 1;
3696                                 if ((info->emu.pluscount == 3) &&
3697                                     time_after(jiffies,
3698                                             info->emu.lastplus + PLUSWAIT2)) {
3699                                         info->emu.pluscount = 0;
3700                                         info->online = 0;
3701                                         isdn_tty_modem_result(RESULT_OK, info);
3702                                 }
3703                         }
3704                 }
3705         isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3706 }
3707
3708 /*
3709  * Put a RING-message to all modem-channels who have the RI-bit set.
3710  * This function is called every second via timer-interrupt from within
3711  * timer-dispatcher isdn_timer_function()
3712  */
3713 void
3714 isdn_tty_modem_ring(void)
3715 {
3716         int ton = 0;
3717         int i;
3718
3719         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3720                 modem_info *info = &dev->mdm.info[i];
3721                 if (info->msr & UART_MSR_RI) {
3722                         ton = 1;
3723                         isdn_tty_modem_result(RESULT_RING, info);
3724                 }
3725         }
3726         isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3727 }
3728
3729 /*
3730  * For all online tty's, try sending data to
3731  * the lower levels.
3732  */
3733 void
3734 isdn_tty_modem_xmit(void)
3735 {
3736         int ton = 1;
3737         int i;
3738
3739         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3740                 modem_info *info = &dev->mdm.info[i];
3741                 if (info->online) {
3742                         ton = 1;
3743                         isdn_tty_senddown(info);
3744                         isdn_tty_tint(info);
3745                 }
3746         }
3747         isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3748 }
3749
3750 /*
3751  * Check all channels if we have a 'no carrier' timeout.
3752  * Timeout value is set by Register S7.
3753  */
3754 void
3755 isdn_tty_carrier_timeout(void)
3756 {
3757         int ton = 0;
3758         int i;
3759
3760         for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3761                 modem_info *info = &dev->mdm.info[i];
3762                 if (!info->dialing)
3763                         continue;
3764                 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3765                         info->dialing = 0;
3766                         isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3767                         isdn_tty_modem_hup(info, 1);
3768                 } else
3769                         ton = 1;
3770         }
3771         isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3772 }