drivers/isdn/i4l/isdn_tty.c

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