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[deliverable/linux.git] / drivers / isdn / i4l / isdn_tty.c
1 /* $Id: isdn_tty.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
2 *
3 * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
4 *
5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
7 *
8 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 */
12 #undef ISDN_TTY_STAT_DEBUG
13
14 #include <linux/isdn.h>
15 #include <linux/delay.h>
16 #include "isdn_common.h"
17 #include "isdn_tty.h"
18 #ifdef CONFIG_ISDN_AUDIO
19 #include "isdn_audio.h"
20 #define VBUF 0x3e0
21 #define VBUFX (VBUF/16)
22 #endif
23
24 #define FIX_FILE_TRANSFER
25 #define DUMMY_HAYES_AT
26
27 /* Prototypes */
28
29 static int isdn_tty_edit_at(const char *, int, modem_info *);
30 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
31 static void isdn_tty_modem_reset_regs(modem_info *, int);
32 static void isdn_tty_cmd_ATA(modem_info *);
33 static void isdn_tty_flush_buffer(struct tty_struct *);
34 static void isdn_tty_modem_result(int, modem_info *);
35 #ifdef CONFIG_ISDN_AUDIO
36 static int isdn_tty_countDLE(unsigned char *, int);
37 #endif
38
39 /* Leave this unchanged unless you know what you do! */
40 #define MODEM_PARANOIA_CHECK
41 #define MODEM_DO_RESTART
42
43 static int bit2si[8] =
44 {1, 5, 7, 7, 7, 7, 7, 7};
45 static int si2bit[8] =
46 {4, 1, 4, 4, 4, 4, 4, 4};
47
48 char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
49
50
51 /* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
52 * to stuff incoming data directly into a tty's flip-buffer. This
53 * is done to speed up tty-receiving if the receive-queue is empty.
54 * This routine MUST be called with interrupts off.
55 * Return:
56 * 1 = Success
57 * 0 = Failure, data has to be buffered and later processed by
58 * isdn_tty_readmodem().
59 */
60 static int
61 isdn_tty_try_read(modem_info * info, struct sk_buff *skb)
62 {
63 int c;
64 int len;
65 struct tty_struct *tty;
66 char last;
67
68 if (info->online) {
69 if ((tty = info->tty)) {
70 if (info->mcr & UART_MCR_RTS) {
71 len = skb->len
72 #ifdef CONFIG_ISDN_AUDIO
73 + ISDN_AUDIO_SKB_DLECOUNT(skb)
74 #endif
75 ;
76
77 c = tty_buffer_request_room(tty, len);
78 if (c >= len) {
79 #ifdef CONFIG_ISDN_AUDIO
80 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
81 int l = skb->len;
82 unsigned char *dp = skb->data;
83 while (--l) {
84 if (*dp == DLE)
85 tty_insert_flip_char(tty, DLE, 0);
86 tty_insert_flip_char(tty, *dp++, 0);
87 }
88 last = *dp;
89 } else {
90 #endif
91 if(len > 1)
92 tty_insert_flip_string(tty, skb->data, len - 1);
93 last = skb->data[len - 1];
94 #ifdef CONFIG_ISDN_AUDIO
95 }
96 #endif
97 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
98 tty_insert_flip_char(tty, last, 0xFF);
99 else
100 tty_insert_flip_char(tty, last, TTY_NORMAL);
101 tty_flip_buffer_push(tty);
102 kfree_skb(skb);
103 return 1;
104 }
105 }
106 }
107 }
108 return 0;
109 }
110
111 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
112 * It tries getting received data from the receive queue an stuff it into
113 * the tty's flip-buffer.
114 */
115 void
116 isdn_tty_readmodem(void)
117 {
118 int resched = 0;
119 int midx;
120 int i;
121 int r;
122 struct tty_struct *tty;
123 modem_info *info;
124
125 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
126 if ((midx = dev->m_idx[i]) >= 0) {
127 info = &dev->mdm.info[midx];
128 if (info->online) {
129 r = 0;
130 #ifdef CONFIG_ISDN_AUDIO
131 isdn_audio_eval_dtmf(info);
132 if ((info->vonline & 1) && (info->emu.vpar[1]))
133 isdn_audio_eval_silence(info);
134 #endif
135 if ((tty = info->tty)) {
136 if (info->mcr & UART_MCR_RTS) {
137 /* CISCO AsyncPPP Hack */
138 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
139 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
140 else
141 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
142 if (r)
143 tty_flip_buffer_push(tty);
144 } else
145 r = 1;
146 } else
147 r = 1;
148 if (r) {
149 info->rcvsched = 0;
150 resched = 1;
151 } else
152 info->rcvsched = 1;
153 }
154 }
155 }
156 if (!resched)
157 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
158 }
159
160 int
161 isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
162 {
163 ulong flags;
164 int midx;
165 #ifdef CONFIG_ISDN_AUDIO
166 int ifmt;
167 #endif
168 modem_info *info;
169
170 if ((midx = dev->m_idx[i]) < 0) {
171 /* if midx is invalid, packet is not for tty */
172 return 0;
173 }
174 info = &dev->mdm.info[midx];
175 #ifdef CONFIG_ISDN_AUDIO
176 ifmt = 1;
177
178 if ((info->vonline) && (!info->emu.vpar[4]))
179 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
180 if ((info->vonline & 1) && (info->emu.vpar[1]))
181 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
182 #endif
183 if ((info->online < 2)
184 #ifdef CONFIG_ISDN_AUDIO
185 && (!(info->vonline & 1))
186 #endif
187 ) {
188 /* If Modem not listening, drop data */
189 kfree_skb(skb);
190 return 1;
191 }
192 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
193 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
194 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
195 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
196 skb_pull(skb, 4);
197 else
198 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
199 skb_pull(skb, 2);
200 } else
201 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
202 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
203 skb_pull(skb, 4);
204 }
205 #ifdef CONFIG_ISDN_AUDIO
206 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
207 ISDN_AUDIO_SKB_LOCK(skb) = 0;
208 if (info->vonline & 1) {
209 /* voice conversion/compression */
210 switch (info->emu.vpar[3]) {
211 case 2:
212 case 3:
213 case 4:
214 /* adpcm
215 * Since compressed data takes less
216 * space, we can overwrite the buffer.
217 */
218 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
219 ifmt,
220 skb->data,
221 skb->data,
222 skb->len));
223 break;
224 case 5:
225 /* a-law */
226 if (!ifmt)
227 isdn_audio_ulaw2alaw(skb->data, skb->len);
228 break;
229 case 6:
230 /* u-law */
231 if (ifmt)
232 isdn_audio_alaw2ulaw(skb->data, skb->len);
233 break;
234 }
235 ISDN_AUDIO_SKB_DLECOUNT(skb) =
236 isdn_tty_countDLE(skb->data, skb->len);
237 }
238 #ifdef CONFIG_ISDN_TTY_FAX
239 else {
240 if (info->faxonline & 2) {
241 isdn_tty_fax_bitorder(info, skb);
242 ISDN_AUDIO_SKB_DLECOUNT(skb) =
243 isdn_tty_countDLE(skb->data, skb->len);
244 }
245 }
246 #endif
247 #endif
248 /* Try to deliver directly via tty-buf if queue is empty */
249 spin_lock_irqsave(&info->readlock, flags);
250 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
251 if (isdn_tty_try_read(info, skb)) {
252 spin_unlock_irqrestore(&info->readlock, flags);
253 return 1;
254 }
255 /* Direct deliver failed or queue wasn't empty.
256 * Queue up for later dequeueing via timer-irq.
257 */
258 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
259 dev->drv[di]->rcvcount[channel] +=
260 (skb->len
261 #ifdef CONFIG_ISDN_AUDIO
262 + ISDN_AUDIO_SKB_DLECOUNT(skb)
263 #endif
264 );
265 spin_unlock_irqrestore(&info->readlock, flags);
266 /* Schedule dequeuing */
267 if ((dev->modempoll) && (info->rcvsched))
268 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
269 return 1;
270 }
271
272 static void
273 isdn_tty_cleanup_xmit(modem_info * info)
274 {
275 skb_queue_purge(&info->xmit_queue);
276 #ifdef CONFIG_ISDN_AUDIO
277 skb_queue_purge(&info->dtmf_queue);
278 #endif
279 }
280
281 static void
282 isdn_tty_tint(modem_info * info)
283 {
284 struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
285 int len, slen;
286
287 if (!skb)
288 return;
289 len = skb->len;
290 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
291 info->isdn_channel, 1, skb)) == len) {
292 struct tty_struct *tty = info->tty;
293 info->send_outstanding++;
294 info->msr &= ~UART_MSR_CTS;
295 info->lsr &= ~UART_LSR_TEMT;
296 tty_wakeup(tty);
297 return;
298 }
299 if (slen < 0) {
300 /* Error: no channel, already shutdown, or wrong parameter */
301 dev_kfree_skb(skb);
302 return;
303 }
304 skb_queue_head(&info->xmit_queue, skb);
305 }
306
307 #ifdef CONFIG_ISDN_AUDIO
308 static int
309 isdn_tty_countDLE(unsigned char *buf, int len)
310 {
311 int count = 0;
312
313 while (len--)
314 if (*buf++ == DLE)
315 count++;
316 return count;
317 }
318
319 /* This routine is called from within isdn_tty_write() to perform
320 * DLE-decoding when sending audio-data.
321 */
322 static int
323 isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
324 {
325 unsigned char *p = &info->xmit_buf[info->xmit_count];
326 int count = 0;
327
328 while (len > 0) {
329 if (m->lastDLE) {
330 m->lastDLE = 0;
331 switch (*p) {
332 case DLE:
333 /* Escape code */
334 if (len > 1)
335 memmove(p, p + 1, len - 1);
336 p--;
337 count++;
338 break;
339 case ETX:
340 /* End of data */
341 info->vonline |= 4;
342 return count;
343 case DC4:
344 /* Abort RX */
345 info->vonline &= ~1;
346 #ifdef ISDN_DEBUG_MODEM_VOICE
347 printk(KERN_DEBUG
348 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
349 info->line);
350 #endif
351 isdn_tty_at_cout("\020\003", info);
352 if (!info->vonline) {
353 #ifdef ISDN_DEBUG_MODEM_VOICE
354 printk(KERN_DEBUG
355 "DLEdown: send VCON on ttyI%d\n",
356 info->line);
357 #endif
358 isdn_tty_at_cout("\r\nVCON\r\n", info);
359 }
360 /* Fall through */
361 case 'q':
362 case 's':
363 /* Silence */
364 if (len > 1)
365 memmove(p, p + 1, len - 1);
366 p--;
367 break;
368 }
369 } else {
370 if (*p == DLE)
371 m->lastDLE = 1;
372 else
373 count++;
374 }
375 p++;
376 len--;
377 }
378 if (len < 0) {
379 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
380 return 0;
381 }
382 return count;
383 }
384
385 /* This routine is called from within isdn_tty_write() when receiving
386 * audio-data. It interrupts receiving, if an character other than
387 * ^S or ^Q is sent.
388 */
389 static int
390 isdn_tty_end_vrx(const char *buf, int c)
391 {
392 char ch;
393
394 while (c--) {
395 ch = *buf;
396 if ((ch != 0x11) && (ch != 0x13))
397 return 1;
398 buf++;
399 }
400 return 0;
401 }
402
403 static int voice_cf[7] =
404 {0, 0, 4, 3, 2, 0, 0};
405
406 #endif /* CONFIG_ISDN_AUDIO */
407
408 /* isdn_tty_senddown() is called either directly from within isdn_tty_write()
409 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
410 * outgoing data from the tty's xmit-buffer, handles voice-decompression or
411 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
412 */
413 static void
414 isdn_tty_senddown(modem_info * info)
415 {
416 int buflen;
417 int skb_res;
418 #ifdef CONFIG_ISDN_AUDIO
419 int audio_len;
420 #endif
421 struct sk_buff *skb;
422
423 #ifdef CONFIG_ISDN_AUDIO
424 if (info->vonline & 4) {
425 info->vonline &= ~6;
426 if (!info->vonline) {
427 #ifdef ISDN_DEBUG_MODEM_VOICE
428 printk(KERN_DEBUG
429 "senddown: send VCON on ttyI%d\n",
430 info->line);
431 #endif
432 isdn_tty_at_cout("\r\nVCON\r\n", info);
433 }
434 }
435 #endif
436 if (!(buflen = info->xmit_count))
437 return;
438 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
439 info->msr &= ~UART_MSR_CTS;
440 info->lsr &= ~UART_LSR_TEMT;
441 /* info->xmit_count is modified here and in isdn_tty_write().
442 * So we return here if isdn_tty_write() is in the
443 * critical section.
444 */
445 atomic_inc(&info->xmit_lock);
446 if (!(atomic_dec_and_test(&info->xmit_lock)))
447 return;
448 if (info->isdn_driver < 0) {
449 info->xmit_count = 0;
450 return;
451 }
452 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
453 #ifdef CONFIG_ISDN_AUDIO
454 if (info->vonline & 2)
455 audio_len = buflen * voice_cf[info->emu.vpar[3]];
456 else
457 audio_len = 0;
458 skb = dev_alloc_skb(skb_res + buflen + audio_len);
459 #else
460 skb = dev_alloc_skb(skb_res + buflen);
461 #endif
462 if (!skb) {
463 printk(KERN_WARNING
464 "isdn_tty: Out of memory in ttyI%d senddown\n",
465 info->line);
466 return;
467 }
468 skb_reserve(skb, skb_res);
469 memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
470 info->xmit_count = 0;
471 #ifdef CONFIG_ISDN_AUDIO
472 if (info->vonline & 2) {
473 /* For now, ifmt is fixed to 1 (alaw), since this
474 * is used with ISDN everywhere in the world, except
475 * US, Canada and Japan.
476 * Later, when US-ISDN protocols are implemented,
477 * this setting will depend on the D-channel protocol.
478 */
479 int ifmt = 1;
480
481 /* voice conversion/decompression */
482 switch (info->emu.vpar[3]) {
483 case 2:
484 case 3:
485 case 4:
486 /* adpcm, compatible to ZyXel 1496 modem
487 * with ROM revision 6.01
488 */
489 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
490 ifmt,
491 skb->data,
492 skb_put(skb, audio_len),
493 buflen);
494 skb_pull(skb, buflen);
495 skb_trim(skb, audio_len);
496 break;
497 case 5:
498 /* a-law */
499 if (!ifmt)
500 isdn_audio_alaw2ulaw(skb->data,
501 buflen);
502 break;
503 case 6:
504 /* u-law */
505 if (ifmt)
506 isdn_audio_ulaw2alaw(skb->data,
507 buflen);
508 break;
509 }
510 }
511 #endif /* CONFIG_ISDN_AUDIO */
512 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
513 /* Add T.70 simplified header */
514 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
515 memcpy(skb_push(skb, 2), "\1\0", 2);
516 else
517 memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
518 }
519 skb_queue_tail(&info->xmit_queue, skb);
520 }
521
522 /************************************************************
523 *
524 * Modem-functions
525 *
526 * mostly "stolen" from original Linux-serial.c and friends.
527 *
528 ************************************************************/
529
530 /* The next routine is called once from within timer-interrupt
531 * triggered within isdn_tty_modem_ncarrier(). It calls
532 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
533 * into the tty's buffer.
534 */
535 static void
536 isdn_tty_modem_do_ncarrier(unsigned long data)
537 {
538 modem_info *info = (modem_info *) data;
539 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
540 }
541
542 /* Next routine is called, whenever the DTR-signal is raised.
543 * It checks the ncarrier-flag, and triggers the above routine
544 * when necessary. The ncarrier-flag is set, whenever DTR goes
545 * low.
546 */
547 static void
548 isdn_tty_modem_ncarrier(modem_info * info)
549 {
550 if (info->ncarrier) {
551 info->nc_timer.expires = jiffies + HZ;
552 add_timer(&info->nc_timer);
553 }
554 }
555
556 /*
557 * return the usage calculated by si and layer 2 protocol
558 */
559 static int
560 isdn_calc_usage(int si, int l2)
561 {
562 int usg = ISDN_USAGE_MODEM;
563
564 #ifdef CONFIG_ISDN_AUDIO
565 if (si == 1) {
566 switch(l2) {
567 case ISDN_PROTO_L2_MODEM:
568 usg = ISDN_USAGE_MODEM;
569 break;
570 #ifdef CONFIG_ISDN_TTY_FAX
571 case ISDN_PROTO_L2_FAX:
572 usg = ISDN_USAGE_FAX;
573 break;
574 #endif
575 case ISDN_PROTO_L2_TRANS:
576 default:
577 usg = ISDN_USAGE_VOICE;
578 break;
579 }
580 }
581 #endif
582 return(usg);
583 }
584
585 /* isdn_tty_dial() performs dialing of a tty an the necessary
586 * setup of the lower levels before that.
587 */
588 static void
589 isdn_tty_dial(char *n, modem_info * info, atemu * m)
590 {
591 int usg = ISDN_USAGE_MODEM;
592 int si = 7;
593 int l2 = m->mdmreg[REG_L2PROT];
594 u_long flags;
595 isdn_ctrl cmd;
596 int i;
597 int j;
598
599 for (j = 7; j >= 0; j--)
600 if (m->mdmreg[REG_SI1] & (1 << j)) {
601 si = bit2si[j];
602 break;
603 }
604 usg = isdn_calc_usage(si, l2);
605 #ifdef CONFIG_ISDN_AUDIO
606 if ((si == 1) &&
607 (l2 != ISDN_PROTO_L2_MODEM)
608 #ifdef CONFIG_ISDN_TTY_FAX
609 && (l2 != ISDN_PROTO_L2_FAX)
610 #endif
611 ) {
612 l2 = ISDN_PROTO_L2_TRANS;
613 usg = ISDN_USAGE_VOICE;
614 }
615 #endif
616 m->mdmreg[REG_SI1I] = si2bit[si];
617 spin_lock_irqsave(&dev->lock, flags);
618 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
619 if (i < 0) {
620 spin_unlock_irqrestore(&dev->lock, flags);
621 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
622 } else {
623 info->isdn_driver = dev->drvmap[i];
624 info->isdn_channel = dev->chanmap[i];
625 info->drv_index = i;
626 dev->m_idx[i] = info->line;
627 dev->usage[i] |= ISDN_USAGE_OUTGOING;
628 info->last_dir = 1;
629 strcpy(info->last_num, n);
630 isdn_info_update();
631 spin_unlock_irqrestore(&dev->lock, flags);
632 cmd.driver = info->isdn_driver;
633 cmd.arg = info->isdn_channel;
634 cmd.command = ISDN_CMD_CLREAZ;
635 isdn_command(&cmd);
636 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
637 cmd.driver = info->isdn_driver;
638 cmd.command = ISDN_CMD_SETEAZ;
639 isdn_command(&cmd);
640 cmd.driver = info->isdn_driver;
641 cmd.command = ISDN_CMD_SETL2;
642 info->last_l2 = l2;
643 cmd.arg = info->isdn_channel + (l2 << 8);
644 isdn_command(&cmd);
645 cmd.driver = info->isdn_driver;
646 cmd.command = ISDN_CMD_SETL3;
647 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
648 #ifdef CONFIG_ISDN_TTY_FAX
649 if (l2 == ISDN_PROTO_L2_FAX) {
650 cmd.parm.fax = info->fax;
651 info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
652 }
653 #endif
654 isdn_command(&cmd);
655 cmd.driver = info->isdn_driver;
656 cmd.arg = info->isdn_channel;
657 sprintf(cmd.parm.setup.phone, "%s", n);
658 sprintf(cmd.parm.setup.eazmsn, "%s",
659 isdn_map_eaz2msn(m->msn, info->isdn_driver));
660 cmd.parm.setup.si1 = si;
661 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
662 cmd.command = ISDN_CMD_DIAL;
663 info->dialing = 1;
664 info->emu.carrierwait = 0;
665 strcpy(dev->num[i], n);
666 isdn_info_update();
667 isdn_command(&cmd);
668 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
669 }
670 }
671
672 /* isdn_tty_hangup() disassociates a tty from the real
673 * ISDN-line (hangup). The usage-status is cleared
674 * and some cleanup is done also.
675 */
676 void
677 isdn_tty_modem_hup(modem_info * info, int local)
678 {
679 isdn_ctrl cmd;
680 int di, ch;
681
682 if (!info)
683 return;
684
685 di = info->isdn_driver;
686 ch = info->isdn_channel;
687 if (di < 0 || ch < 0)
688 return;
689
690 info->isdn_driver = -1;
691 info->isdn_channel = -1;
692
693 #ifdef ISDN_DEBUG_MODEM_HUP
694 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
695 #endif
696 info->rcvsched = 0;
697 isdn_tty_flush_buffer(info->tty);
698 if (info->online) {
699 info->last_lhup = local;
700 info->online = 0;
701 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
702 }
703 #ifdef CONFIG_ISDN_AUDIO
704 info->vonline = 0;
705 #ifdef CONFIG_ISDN_TTY_FAX
706 info->faxonline = 0;
707 info->fax->phase = ISDN_FAX_PHASE_IDLE;
708 #endif
709 info->emu.vpar[4] = 0;
710 info->emu.vpar[5] = 8;
711 kfree(info->dtmf_state);
712 info->dtmf_state = NULL;
713 kfree(info->silence_state);
714 info->silence_state = NULL;
715 kfree(info->adpcms);
716 info->adpcms = NULL;
717 kfree(info->adpcmr);
718 info->adpcmr = NULL;
719 #endif
720 if ((info->msr & UART_MSR_RI) &&
721 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
722 isdn_tty_modem_result(RESULT_RUNG, info);
723 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
724 info->lsr |= UART_LSR_TEMT;
725
726 if (local) {
727 cmd.driver = di;
728 cmd.command = ISDN_CMD_HANGUP;
729 cmd.arg = ch;
730 isdn_command(&cmd);
731 }
732
733 isdn_all_eaz(di, ch);
734 info->emu.mdmreg[REG_RINGCNT] = 0;
735 isdn_free_channel(di, ch, 0);
736
737 if (info->drv_index >= 0) {
738 dev->m_idx[info->drv_index] = -1;
739 info->drv_index = -1;
740 }
741 }
742
743 /*
744 * Begin of a CAPI like interface, currently used only for
745 * supplementary service (CAPI 2.0 part III)
746 */
747 #include <linux/isdn/capicmd.h>
748
749 int
750 isdn_tty_capi_facility(capi_msg *cm) {
751 return(-1); /* dummy */
752 }
753
754 /* isdn_tty_suspend() tries to suspend the current tty connection
755 */
756 static void
757 isdn_tty_suspend(char *id, modem_info * info, atemu * m)
758 {
759 isdn_ctrl cmd;
760
761 int l;
762
763 if (!info)
764 return;
765
766 #ifdef ISDN_DEBUG_MODEM_SERVICES
767 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
768 #endif
769 l = strlen(id);
770 if ((info->isdn_driver >= 0)) {
771 cmd.parm.cmsg.Length = l+18;
772 cmd.parm.cmsg.Command = CAPI_FACILITY;
773 cmd.parm.cmsg.Subcommand = CAPI_REQ;
774 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
775 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
776 cmd.parm.cmsg.para[1] = 0;
777 cmd.parm.cmsg.para[2] = l + 3;
778 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
779 cmd.parm.cmsg.para[4] = 0;
780 cmd.parm.cmsg.para[5] = l;
781 strncpy(&cmd.parm.cmsg.para[6], id, l);
782 cmd.command = CAPI_PUT_MESSAGE;
783 cmd.driver = info->isdn_driver;
784 cmd.arg = info->isdn_channel;
785 isdn_command(&cmd);
786 }
787 }
788
789 /* isdn_tty_resume() tries to resume a suspended call
790 * setup of the lower levels before that. unfortunatly here is no
791 * checking for compatibility of used protocols implemented by Q931
792 * It does the same things like isdn_tty_dial, the last command
793 * is different, may be we can merge it.
794 */
795
796 static void
797 isdn_tty_resume(char *id, modem_info * info, atemu * m)
798 {
799 int usg = ISDN_USAGE_MODEM;
800 int si = 7;
801 int l2 = m->mdmreg[REG_L2PROT];
802 isdn_ctrl cmd;
803 ulong flags;
804 int i;
805 int j;
806 int l;
807
808 l = strlen(id);
809 for (j = 7; j >= 0; j--)
810 if (m->mdmreg[REG_SI1] & (1 << j)) {
811 si = bit2si[j];
812 break;
813 }
814 usg = isdn_calc_usage(si, l2);
815 #ifdef CONFIG_ISDN_AUDIO
816 if ((si == 1) &&
817 (l2 != ISDN_PROTO_L2_MODEM)
818 #ifdef CONFIG_ISDN_TTY_FAX
819 && (l2 != ISDN_PROTO_L2_FAX)
820 #endif
821 ) {
822 l2 = ISDN_PROTO_L2_TRANS;
823 usg = ISDN_USAGE_VOICE;
824 }
825 #endif
826 m->mdmreg[REG_SI1I] = si2bit[si];
827 spin_lock_irqsave(&dev->lock, flags);
828 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
829 if (i < 0) {
830 spin_unlock_irqrestore(&dev->lock, flags);
831 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
832 } else {
833 info->isdn_driver = dev->drvmap[i];
834 info->isdn_channel = dev->chanmap[i];
835 info->drv_index = i;
836 dev->m_idx[i] = info->line;
837 dev->usage[i] |= ISDN_USAGE_OUTGOING;
838 info->last_dir = 1;
839 // strcpy(info->last_num, n);
840 isdn_info_update();
841 spin_unlock_irqrestore(&dev->lock, flags);
842 cmd.driver = info->isdn_driver;
843 cmd.arg = info->isdn_channel;
844 cmd.command = ISDN_CMD_CLREAZ;
845 isdn_command(&cmd);
846 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
847 cmd.driver = info->isdn_driver;
848 cmd.command = ISDN_CMD_SETEAZ;
849 isdn_command(&cmd);
850 cmd.driver = info->isdn_driver;
851 cmd.command = ISDN_CMD_SETL2;
852 info->last_l2 = l2;
853 cmd.arg = info->isdn_channel + (l2 << 8);
854 isdn_command(&cmd);
855 cmd.driver = info->isdn_driver;
856 cmd.command = ISDN_CMD_SETL3;
857 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
858 isdn_command(&cmd);
859 cmd.driver = info->isdn_driver;
860 cmd.arg = info->isdn_channel;
861 cmd.parm.cmsg.Length = l+18;
862 cmd.parm.cmsg.Command = CAPI_FACILITY;
863 cmd.parm.cmsg.Subcommand = CAPI_REQ;
864 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
865 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
866 cmd.parm.cmsg.para[1] = 0;
867 cmd.parm.cmsg.para[2] = l+3;
868 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
869 cmd.parm.cmsg.para[4] = 0;
870 cmd.parm.cmsg.para[5] = l;
871 strncpy(&cmd.parm.cmsg.para[6], id, l);
872 cmd.command =CAPI_PUT_MESSAGE;
873 info->dialing = 1;
874 // strcpy(dev->num[i], n);
875 isdn_info_update();
876 isdn_command(&cmd);
877 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
878 }
879 }
880
881 /* isdn_tty_send_msg() sends a message to a HL driver
882 * This is used for hybrid modem cards to send AT commands to it
883 */
884
885 static void
886 isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
887 {
888 int usg = ISDN_USAGE_MODEM;
889 int si = 7;
890 int l2 = m->mdmreg[REG_L2PROT];
891 isdn_ctrl cmd;
892 ulong flags;
893 int i;
894 int j;
895 int l;
896
897 l = strlen(msg);
898 if (!l) {
899 isdn_tty_modem_result(RESULT_ERROR, info);
900 return;
901 }
902 for (j = 7; j >= 0; j--)
903 if (m->mdmreg[REG_SI1] & (1 << j)) {
904 si = bit2si[j];
905 break;
906 }
907 usg = isdn_calc_usage(si, l2);
908 #ifdef CONFIG_ISDN_AUDIO
909 if ((si == 1) &&
910 (l2 != ISDN_PROTO_L2_MODEM)
911 #ifdef CONFIG_ISDN_TTY_FAX
912 && (l2 != ISDN_PROTO_L2_FAX)
913 #endif
914 ) {
915 l2 = ISDN_PROTO_L2_TRANS;
916 usg = ISDN_USAGE_VOICE;
917 }
918 #endif
919 m->mdmreg[REG_SI1I] = si2bit[si];
920 spin_lock_irqsave(&dev->lock, flags);
921 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
922 if (i < 0) {
923 spin_unlock_irqrestore(&dev->lock, flags);
924 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
925 } else {
926 info->isdn_driver = dev->drvmap[i];
927 info->isdn_channel = dev->chanmap[i];
928 info->drv_index = i;
929 dev->m_idx[i] = info->line;
930 dev->usage[i] |= ISDN_USAGE_OUTGOING;
931 info->last_dir = 1;
932 isdn_info_update();
933 spin_unlock_irqrestore(&dev->lock, flags);
934 cmd.driver = info->isdn_driver;
935 cmd.arg = info->isdn_channel;
936 cmd.command = ISDN_CMD_CLREAZ;
937 isdn_command(&cmd);
938 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
939 cmd.driver = info->isdn_driver;
940 cmd.command = ISDN_CMD_SETEAZ;
941 isdn_command(&cmd);
942 cmd.driver = info->isdn_driver;
943 cmd.command = ISDN_CMD_SETL2;
944 info->last_l2 = l2;
945 cmd.arg = info->isdn_channel + (l2 << 8);
946 isdn_command(&cmd);
947 cmd.driver = info->isdn_driver;
948 cmd.command = ISDN_CMD_SETL3;
949 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
950 isdn_command(&cmd);
951 cmd.driver = info->isdn_driver;
952 cmd.arg = info->isdn_channel;
953 cmd.parm.cmsg.Length = l+14;
954 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
955 cmd.parm.cmsg.Subcommand = CAPI_REQ;
956 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
957 cmd.parm.cmsg.para[0] = l+1;
958 strncpy(&cmd.parm.cmsg.para[1], msg, l);
959 cmd.parm.cmsg.para[l+1] = 0xd;
960 cmd.command =CAPI_PUT_MESSAGE;
961 /* info->dialing = 1;
962 strcpy(dev->num[i], n);
963 isdn_info_update();
964 */
965 isdn_command(&cmd);
966 }
967 }
968
969 static inline int
970 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
971 {
972 #ifdef MODEM_PARANOIA_CHECK
973 if (!info) {
974 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
975 name, routine);
976 return 1;
977 }
978 if (info->magic != ISDN_ASYNC_MAGIC) {
979 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
980 name, routine);
981 return 1;
982 }
983 #endif
984 return 0;
985 }
986
987 /*
988 * This routine is called to set the UART divisor registers to match
989 * the specified baud rate for a serial port.
990 */
991 static void
992 isdn_tty_change_speed(modem_info * info)
993 {
994 uint cflag,
995 cval,
996 fcr,
997 quot;
998 int i;
999
1000 if (!info->tty || !info->tty->termios)
1001 return;
1002 cflag = info->tty->termios->c_cflag;
1003
1004 quot = i = cflag & CBAUD;
1005 if (i & CBAUDEX) {
1006 i &= ~CBAUDEX;
1007 if (i < 1 || i > 2)
1008 info->tty->termios->c_cflag &= ~CBAUDEX;
1009 else
1010 i += 15;
1011 }
1012 if (quot) {
1013 info->mcr |= UART_MCR_DTR;
1014 isdn_tty_modem_ncarrier(info);
1015 } else {
1016 info->mcr &= ~UART_MCR_DTR;
1017 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1018 #ifdef ISDN_DEBUG_MODEM_HUP
1019 printk(KERN_DEBUG "Mhup in changespeed\n");
1020 #endif
1021 if (info->online)
1022 info->ncarrier = 1;
1023 isdn_tty_modem_reset_regs(info, 0);
1024 isdn_tty_modem_hup(info, 1);
1025 }
1026 return;
1027 }
1028 /* byte size and parity */
1029 cval = cflag & (CSIZE | CSTOPB);
1030 cval >>= 4;
1031 if (cflag & PARENB)
1032 cval |= UART_LCR_PARITY;
1033 if (!(cflag & PARODD))
1034 cval |= UART_LCR_EPAR;
1035 fcr = 0;
1036
1037 /* CTS flow control flag and modem status interrupts */
1038 if (cflag & CRTSCTS) {
1039 info->flags |= ISDN_ASYNC_CTS_FLOW;
1040 } else
1041 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1042 if (cflag & CLOCAL)
1043 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1044 else {
1045 info->flags |= ISDN_ASYNC_CHECK_CD;
1046 }
1047 }
1048
1049 static int
1050 isdn_tty_startup(modem_info * info)
1051 {
1052 if (info->flags & ISDN_ASYNC_INITIALIZED)
1053 return 0;
1054 isdn_lock_drivers();
1055 #ifdef ISDN_DEBUG_MODEM_OPEN
1056 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1057 #endif
1058 /*
1059 * Now, initialize the UART
1060 */
1061 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1062 if (info->tty)
1063 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1064 /*
1065 * and set the speed of the serial port
1066 */
1067 isdn_tty_change_speed(info);
1068
1069 info->flags |= ISDN_ASYNC_INITIALIZED;
1070 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1071 info->send_outstanding = 0;
1072 return 0;
1073 }
1074
1075 /*
1076 * This routine will shutdown a serial port; interrupts are disabled, and
1077 * DTR is dropped if the hangup on close termio flag is on.
1078 */
1079 static void
1080 isdn_tty_shutdown(modem_info * info)
1081 {
1082 if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1083 return;
1084 #ifdef ISDN_DEBUG_MODEM_OPEN
1085 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1086 #endif
1087 isdn_unlock_drivers();
1088 info->msr &= ~UART_MSR_RI;
1089 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1090 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1091 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1092 isdn_tty_modem_reset_regs(info, 0);
1093 #ifdef ISDN_DEBUG_MODEM_HUP
1094 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1095 #endif
1096 isdn_tty_modem_hup(info, 1);
1097 }
1098 }
1099 if (info->tty)
1100 set_bit(TTY_IO_ERROR, &info->tty->flags);
1101
1102 info->flags &= ~ISDN_ASYNC_INITIALIZED;
1103 }
1104
1105 /* isdn_tty_write() is the main send-routine. It is called from the upper
1106 * levels within the kernel to perform sending data. Depending on the
1107 * online-flag it either directs output to the at-command-interpreter or
1108 * to the lower level. Additional tasks done here:
1109 * - If online, check for escape-sequence (+++)
1110 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1111 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1112 * - If dialing, abort dial.
1113 */
1114 static int
1115 isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
1116 {
1117 int c;
1118 int total = 0;
1119 modem_info *info = (modem_info *) tty->driver_data;
1120 atemu *m = &info->emu;
1121
1122 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1123 return 0;
1124 /* See isdn_tty_senddown() */
1125 atomic_inc(&info->xmit_lock);
1126 while (1) {
1127 c = count;
1128 if (c > info->xmit_size - info->xmit_count)
1129 c = info->xmit_size - info->xmit_count;
1130 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1131 c = dev->drv[info->isdn_driver]->maxbufsize;
1132 if (c <= 0)
1133 break;
1134 if ((info->online > 1)
1135 #ifdef CONFIG_ISDN_AUDIO
1136 || (info->vonline & 3)
1137 #endif
1138 ) {
1139 #ifdef CONFIG_ISDN_AUDIO
1140 if (!info->vonline)
1141 #endif
1142 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1143 &(m->pluscount),
1144 &(m->lastplus));
1145 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1146 #ifdef CONFIG_ISDN_AUDIO
1147 if (info->vonline) {
1148 int cc = isdn_tty_handleDLEdown(info, m, c);
1149 if (info->vonline & 2) {
1150 if (!cc) {
1151 /* If DLE decoding results in zero-transmit, but
1152 * c originally was non-zero, do a wakeup.
1153 */
1154 tty_wakeup(tty);
1155 info->msr |= UART_MSR_CTS;
1156 info->lsr |= UART_LSR_TEMT;
1157 }
1158 info->xmit_count += cc;
1159 }
1160 if ((info->vonline & 3) == 1) {
1161 /* Do NOT handle Ctrl-Q or Ctrl-S
1162 * when in full-duplex audio mode.
1163 */
1164 if (isdn_tty_end_vrx(buf, c)) {
1165 info->vonline &= ~1;
1166 #ifdef ISDN_DEBUG_MODEM_VOICE
1167 printk(KERN_DEBUG
1168 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1169 info->line);
1170 #endif
1171 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1172 }
1173 }
1174 } else
1175 if (TTY_IS_FCLASS1(info)) {
1176 int cc = isdn_tty_handleDLEdown(info, m, c);
1177
1178 if (info->vonline & 4) { /* ETX seen */
1179 isdn_ctrl c;
1180
1181 c.command = ISDN_CMD_FAXCMD;
1182 c.driver = info->isdn_driver;
1183 c.arg = info->isdn_channel;
1184 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1185 c.parm.aux.subcmd = ETX;
1186 isdn_command(&c);
1187 }
1188 info->vonline = 0;
1189 #ifdef ISDN_DEBUG_MODEM_VOICE
1190 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1191 #endif
1192 info->xmit_count += cc;
1193 } else
1194 #endif
1195 info->xmit_count += c;
1196 } else {
1197 info->msr |= UART_MSR_CTS;
1198 info->lsr |= UART_LSR_TEMT;
1199 if (info->dialing) {
1200 info->dialing = 0;
1201 #ifdef ISDN_DEBUG_MODEM_HUP
1202 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1203 #endif
1204 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1205 isdn_tty_modem_hup(info, 1);
1206 } else
1207 c = isdn_tty_edit_at(buf, c, info);
1208 }
1209 buf += c;
1210 count -= c;
1211 total += c;
1212 }
1213 atomic_dec(&info->xmit_lock);
1214 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1215 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1216 isdn_tty_senddown(info);
1217 isdn_tty_tint(info);
1218 }
1219 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1220 }
1221 return total;
1222 }
1223
1224 static int
1225 isdn_tty_write_room(struct tty_struct *tty)
1226 {
1227 modem_info *info = (modem_info *) tty->driver_data;
1228 int ret;
1229
1230 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1231 return 0;
1232 if (!info->online)
1233 return info->xmit_size;
1234 ret = info->xmit_size - info->xmit_count;
1235 return (ret < 0) ? 0 : ret;
1236 }
1237
1238 static int
1239 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1240 {
1241 modem_info *info = (modem_info *) tty->driver_data;
1242
1243 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1244 return 0;
1245 if (!info->online)
1246 return 0;
1247 return (info->xmit_count);
1248 }
1249
1250 static void
1251 isdn_tty_flush_buffer(struct tty_struct *tty)
1252 {
1253 modem_info *info;
1254
1255 if (!tty) {
1256 return;
1257 }
1258 info = (modem_info *) tty->driver_data;
1259 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1260 return;
1261 }
1262 isdn_tty_cleanup_xmit(info);
1263 info->xmit_count = 0;
1264 wake_up_interruptible(&tty->write_wait);
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, struct file *file)
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, __FUNCTION__))
1350 return -ENODEV;
1351 if (tty->flags & (1 << TTY_IO_ERROR))
1352 return -EIO;
1353
1354 #ifdef ISDN_DEBUG_MODEM_IOCTL
1355 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1356 #endif
1357
1358 control = info->mcr;
1359 status = info->msr;
1360 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1361 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1362 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1363 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1364 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1365 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1366 }
1367
1368 static int
1369 isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
1370 unsigned int set, unsigned int clear)
1371 {
1372 modem_info *info = (modem_info *) tty->driver_data;
1373
1374 if (isdn_tty_paranoia_check(info, tty->name, __FUNCTION__))
1375 return -ENODEV;
1376 if (tty->flags & (1 << TTY_IO_ERROR))
1377 return -EIO;
1378
1379 #ifdef ISDN_DEBUG_MODEM_IOCTL
1380 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1381 #endif
1382
1383 if (set & TIOCM_RTS)
1384 info->mcr |= UART_MCR_RTS;
1385 if (set & TIOCM_DTR) {
1386 info->mcr |= UART_MCR_DTR;
1387 isdn_tty_modem_ncarrier(info);
1388 }
1389
1390 if (clear & TIOCM_RTS)
1391 info->mcr &= ~UART_MCR_RTS;
1392 if (clear & TIOCM_DTR) {
1393 info->mcr &= ~UART_MCR_DTR;
1394 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1395 isdn_tty_modem_reset_regs(info, 0);
1396 #ifdef ISDN_DEBUG_MODEM_HUP
1397 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1398 #endif
1399 if (info->online)
1400 info->ncarrier = 1;
1401 isdn_tty_modem_hup(info, 1);
1402 }
1403 }
1404 return 0;
1405 }
1406
1407 static int
1408 isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
1409 uint cmd, ulong arg)
1410 {
1411 modem_info *info = (modem_info *) tty->driver_data;
1412 int retval;
1413
1414 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1415 return -ENODEV;
1416 if (tty->flags & (1 << TTY_IO_ERROR))
1417 return -EIO;
1418 switch (cmd) {
1419 case TCSBRK: /* SVID version: non-zero arg --> no break */
1420 #ifdef ISDN_DEBUG_MODEM_IOCTL
1421 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1422 #endif
1423 retval = tty_check_change(tty);
1424 if (retval)
1425 return retval;
1426 tty_wait_until_sent(tty, 0);
1427 return 0;
1428 case TCSBRKP: /* support for POSIX tcsendbreak() */
1429 #ifdef ISDN_DEBUG_MODEM_IOCTL
1430 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1431 #endif
1432 retval = tty_check_change(tty);
1433 if (retval)
1434 return retval;
1435 tty_wait_until_sent(tty, 0);
1436 return 0;
1437 case TIOCGSOFTCAR:
1438 #ifdef ISDN_DEBUG_MODEM_IOCTL
1439 printk(KERN_DEBUG "ttyI%d ioctl TIOCGSOFTCAR\n", info->line);
1440 #endif
1441 return put_user(C_CLOCAL(tty) ? 1 : 0, (ulong __user *) arg);
1442 case TIOCSSOFTCAR:
1443 #ifdef ISDN_DEBUG_MODEM_IOCTL
1444 printk(KERN_DEBUG "ttyI%d ioctl TIOCSSOFTCAR\n", info->line);
1445 #endif
1446 if (get_user(arg, (ulong __user *) arg))
1447 return -EFAULT;
1448 tty->termios->c_cflag =
1449 ((tty->termios->c_cflag & ~CLOCAL) |
1450 (arg ? CLOCAL : 0));
1451 return 0;
1452 case TIOCSERGETLSR: /* Get line status register */
1453 #ifdef ISDN_DEBUG_MODEM_IOCTL
1454 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1455 #endif
1456 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1457 default:
1458 #ifdef ISDN_DEBUG_MODEM_IOCTL
1459 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1460 #endif
1461 return -ENOIOCTLCMD;
1462 }
1463 return 0;
1464 }
1465
1466 static void
1467 isdn_tty_set_termios(struct tty_struct *tty, struct termios *old_termios)
1468 {
1469 modem_info *info = (modem_info *) tty->driver_data;
1470
1471 if (!old_termios)
1472 isdn_tty_change_speed(info);
1473 else {
1474 if (tty->termios->c_cflag == old_termios->c_cflag)
1475 return;
1476 isdn_tty_change_speed(info);
1477 if ((old_termios->c_cflag & CRTSCTS) &&
1478 !(tty->termios->c_cflag & CRTSCTS)) {
1479 tty->hw_stopped = 0;
1480 }
1481 }
1482 }
1483
1484 /*
1485 * ------------------------------------------------------------
1486 * isdn_tty_open() and friends
1487 * ------------------------------------------------------------
1488 */
1489 static int
1490 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1491 {
1492 DECLARE_WAITQUEUE(wait, NULL);
1493 int do_clocal = 0;
1494 int retval;
1495
1496 /*
1497 * If the device is in the middle of being closed, then block
1498 * until it's done, and then try again.
1499 */
1500 if (tty_hung_up_p(filp) ||
1501 (info->flags & ISDN_ASYNC_CLOSING)) {
1502 if (info->flags & ISDN_ASYNC_CLOSING)
1503 interruptible_sleep_on(&info->close_wait);
1504 #ifdef MODEM_DO_RESTART
1505 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1506 return -EAGAIN;
1507 else
1508 return -ERESTARTSYS;
1509 #else
1510 return -EAGAIN;
1511 #endif
1512 }
1513 /*
1514 * If non-blocking mode is set, then make the check up front
1515 * and then exit.
1516 */
1517 if ((filp->f_flags & O_NONBLOCK) ||
1518 (tty->flags & (1 << TTY_IO_ERROR))) {
1519 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1520 return -EBUSY;
1521 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1522 return 0;
1523 }
1524 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1525 if (info->normal_termios.c_cflag & CLOCAL)
1526 do_clocal = 1;
1527 } else {
1528 if (tty->termios->c_cflag & CLOCAL)
1529 do_clocal = 1;
1530 }
1531 /*
1532 * Block waiting for the carrier detect and the line to become
1533 * free (i.e., not in use by the callout). While we are in
1534 * this loop, info->count is dropped by one, so that
1535 * isdn_tty_close() knows when to free things. We restore it upon
1536 * exit, either normal or abnormal.
1537 */
1538 retval = 0;
1539 add_wait_queue(&info->open_wait, &wait);
1540 #ifdef ISDN_DEBUG_MODEM_OPEN
1541 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1542 info->line, info->count);
1543 #endif
1544 if (!(tty_hung_up_p(filp)))
1545 info->count--;
1546 info->blocked_open++;
1547 while (1) {
1548 set_current_state(TASK_INTERRUPTIBLE);
1549 if (tty_hung_up_p(filp) ||
1550 !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1551 #ifdef MODEM_DO_RESTART
1552 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1553 retval = -EAGAIN;
1554 else
1555 retval = -ERESTARTSYS;
1556 #else
1557 retval = -EAGAIN;
1558 #endif
1559 break;
1560 }
1561 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1562 !(info->flags & ISDN_ASYNC_CLOSING) &&
1563 (do_clocal || (info->msr & UART_MSR_DCD))) {
1564 break;
1565 }
1566 if (signal_pending(current)) {
1567 retval = -ERESTARTSYS;
1568 break;
1569 }
1570 #ifdef ISDN_DEBUG_MODEM_OPEN
1571 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1572 info->line, info->count);
1573 #endif
1574 schedule();
1575 }
1576 current->state = TASK_RUNNING;
1577 remove_wait_queue(&info->open_wait, &wait);
1578 if (!tty_hung_up_p(filp))
1579 info->count++;
1580 info->blocked_open--;
1581 #ifdef ISDN_DEBUG_MODEM_OPEN
1582 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1583 info->line, info->count);
1584 #endif
1585 if (retval)
1586 return retval;
1587 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1588 return 0;
1589 }
1590
1591 /*
1592 * This routine is called whenever a serial port is opened. It
1593 * enables interrupts for a serial port, linking in its async structure into
1594 * the IRQ chain. It also performs the serial-specific
1595 * initialization for the tty structure.
1596 */
1597 static int
1598 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1599 {
1600 modem_info *info;
1601 int retval, line;
1602
1603 line = tty->index;
1604 if (line < 0 || line > ISDN_MAX_CHANNELS)
1605 return -ENODEV;
1606 info = &dev->mdm.info[line];
1607 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1608 return -ENODEV;
1609 if (!try_module_get(info->owner)) {
1610 printk(KERN_WARNING "%s: cannot reserve module\n", __FUNCTION__);
1611 return -ENODEV;
1612 }
1613 #ifdef ISDN_DEBUG_MODEM_OPEN
1614 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1615 info->count);
1616 #endif
1617 info->count++;
1618 tty->driver_data = info;
1619 info->tty = tty;
1620 /*
1621 * Start up serial port
1622 */
1623 retval = isdn_tty_startup(info);
1624 if (retval) {
1625 #ifdef ISDN_DEBUG_MODEM_OPEN
1626 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1627 #endif
1628 module_put(info->owner);
1629 return retval;
1630 }
1631 retval = isdn_tty_block_til_ready(tty, filp, info);
1632 if (retval) {
1633 #ifdef ISDN_DEBUG_MODEM_OPEN
1634 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1635 #endif
1636 module_put(info->owner);
1637 return retval;
1638 }
1639 #ifdef ISDN_DEBUG_MODEM_OPEN
1640 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1641 #endif
1642 dev->modempoll++;
1643 #ifdef ISDN_DEBUG_MODEM_OPEN
1644 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1645 #endif
1646 return 0;
1647 }
1648
1649 static void
1650 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1651 {
1652 modem_info *info = (modem_info *) tty->driver_data;
1653 ulong timeout;
1654
1655 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1656 return;
1657 if (tty_hung_up_p(filp)) {
1658 #ifdef ISDN_DEBUG_MODEM_OPEN
1659 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1660 #endif
1661 return;
1662 }
1663 if ((tty->count == 1) && (info->count != 1)) {
1664 /*
1665 * Uh, oh. tty->count is 1, which means that the tty
1666 * structure will be freed. Info->count should always
1667 * be one in these conditions. If it's greater than
1668 * one, we've got real problems, since it means the
1669 * serial port won't be shutdown.
1670 */
1671 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1672 "info->count is %d\n", info->count);
1673 info->count = 1;
1674 }
1675 if (--info->count < 0) {
1676 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1677 info->line, info->count);
1678 info->count = 0;
1679 }
1680 if (info->count) {
1681 #ifdef ISDN_DEBUG_MODEM_OPEN
1682 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1683 #endif
1684 module_put(info->owner);
1685 return;
1686 }
1687 info->flags |= ISDN_ASYNC_CLOSING;
1688 /*
1689 * Save the termios structure, since this port may have
1690 * separate termios for callout and dialin.
1691 */
1692 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1693 info->normal_termios = *tty->termios;
1694 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1695 info->callout_termios = *tty->termios;
1696
1697 tty->closing = 1;
1698 /*
1699 * At this point we stop accepting input. To do this, we
1700 * disable the receive line status interrupts, and tell the
1701 * interrupt driver to stop checking the data ready bit in the
1702 * line status register.
1703 */
1704 if (info->flags & ISDN_ASYNC_INITIALIZED) {
1705 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1706 /*
1707 * Before we drop DTR, make sure the UART transmitter
1708 * has completely drained; this is especially
1709 * important if there is a transmit FIFO!
1710 */
1711 timeout = jiffies + HZ;
1712 while (!(info->lsr & UART_LSR_TEMT)) {
1713 schedule_timeout_interruptible(20);
1714 if (time_after(jiffies,timeout))
1715 break;
1716 }
1717 }
1718 dev->modempoll--;
1719 isdn_tty_shutdown(info);
1720
1721 if (tty->driver->flush_buffer)
1722 tty->driver->flush_buffer(tty);
1723 tty_ldisc_flush(tty);
1724 info->tty = NULL;
1725 info->ncarrier = 0;
1726 tty->closing = 0;
1727 module_put(info->owner);
1728 if (info->blocked_open) {
1729 msleep_interruptible(500);
1730 wake_up_interruptible(&info->open_wait);
1731 }
1732 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1733 wake_up_interruptible(&info->close_wait);
1734 #ifdef ISDN_DEBUG_MODEM_OPEN
1735 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1736 #endif
1737 }
1738
1739 /*
1740 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1741 */
1742 static void
1743 isdn_tty_hangup(struct tty_struct *tty)
1744 {
1745 modem_info *info = (modem_info *) tty->driver_data;
1746
1747 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1748 return;
1749 isdn_tty_shutdown(info);
1750 info->count = 0;
1751 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1752 info->tty = NULL;
1753 wake_up_interruptible(&info->open_wait);
1754 }
1755
1756 /* This routine initializes all emulator-data.
1757 */
1758 static void
1759 isdn_tty_reset_profile(atemu * m)
1760 {
1761 m->profile[0] = 0;
1762 m->profile[1] = 0;
1763 m->profile[2] = 43;
1764 m->profile[3] = 13;
1765 m->profile[4] = 10;
1766 m->profile[5] = 8;
1767 m->profile[6] = 3;
1768 m->profile[7] = 60;
1769 m->profile[8] = 2;
1770 m->profile[9] = 6;
1771 m->profile[10] = 7;
1772 m->profile[11] = 70;
1773 m->profile[12] = 0x45;
1774 m->profile[13] = 4;
1775 m->profile[14] = ISDN_PROTO_L2_X75I;
1776 m->profile[15] = ISDN_PROTO_L3_TRANS;
1777 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1778 m->profile[17] = ISDN_MODEM_WINSIZE;
1779 m->profile[18] = 4;
1780 m->profile[19] = 0;
1781 m->profile[20] = 0;
1782 m->profile[23] = 0;
1783 m->pmsn[0] = '\0';
1784 m->plmsn[0] = '\0';
1785 }
1786
1787 #ifdef CONFIG_ISDN_AUDIO
1788 static void
1789 isdn_tty_modem_reset_vpar(atemu * m)
1790 {
1791 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1792 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1793 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1794 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1795 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1796 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1797 }
1798 #endif
1799
1800 #ifdef CONFIG_ISDN_TTY_FAX
1801 static void
1802 isdn_tty_modem_reset_faxpar(modem_info * info)
1803 {
1804 T30_s *f = info->fax;
1805
1806 f->code = 0;
1807 f->phase = ISDN_FAX_PHASE_IDLE;
1808 f->direction = 0;
1809 f->resolution = 1; /* fine */
1810 f->rate = 5; /* 14400 bit/s */
1811 f->width = 0;
1812 f->length = 0;
1813 f->compression = 0;
1814 f->ecm = 0;
1815 f->binary = 0;
1816 f->scantime = 0;
1817 memset(&f->id[0], 32, FAXIDLEN - 1);
1818 f->id[FAXIDLEN - 1] = 0;
1819 f->badlin = 0;
1820 f->badmul = 0;
1821 f->bor = 0;
1822 f->nbc = 0;
1823 f->cq = 0;
1824 f->cr = 0;
1825 f->ctcrty = 0;
1826 f->minsp = 0;
1827 f->phcto = 30;
1828 f->rel = 0;
1829 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1830 f->pollid[FAXIDLEN - 1] = 0;
1831 }
1832 #endif
1833
1834 static void
1835 isdn_tty_modem_reset_regs(modem_info * info, int force)
1836 {
1837 atemu *m = &info->emu;
1838 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1839 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1840 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1841 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1842 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1843 }
1844 #ifdef CONFIG_ISDN_AUDIO
1845 isdn_tty_modem_reset_vpar(m);
1846 #endif
1847 #ifdef CONFIG_ISDN_TTY_FAX
1848 isdn_tty_modem_reset_faxpar(info);
1849 #endif
1850 m->mdmcmdl = 0;
1851 }
1852
1853 static void
1854 modem_write_profile(atemu * m)
1855 {
1856 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1857 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1858 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1859 if (dev->profd)
1860 send_sig(SIGIO, dev->profd, 1);
1861 }
1862
1863 static const struct tty_operations modem_ops = {
1864 .open = isdn_tty_open,
1865 .close = isdn_tty_close,
1866 .write = isdn_tty_write,
1867 .flush_chars = isdn_tty_flush_chars,
1868 .write_room = isdn_tty_write_room,
1869 .chars_in_buffer = isdn_tty_chars_in_buffer,
1870 .flush_buffer = isdn_tty_flush_buffer,
1871 .ioctl = isdn_tty_ioctl,
1872 .throttle = isdn_tty_throttle,
1873 .unthrottle = isdn_tty_unthrottle,
1874 .set_termios = isdn_tty_set_termios,
1875 .hangup = isdn_tty_hangup,
1876 .tiocmget = isdn_tty_tiocmget,
1877 .tiocmset = isdn_tty_tiocmset,
1878 };
1879
1880 int
1881 isdn_tty_modem_init(void)
1882 {
1883 isdn_modem_t *m;
1884 int i, retval;
1885 modem_info *info;
1886
1887 m = &dev->mdm;
1888 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1889 if (!m->tty_modem)
1890 return -ENOMEM;
1891 m->tty_modem->name = "ttyI";
1892 m->tty_modem->major = ISDN_TTY_MAJOR;
1893 m->tty_modem->minor_start = 0;
1894 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1895 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1896 m->tty_modem->init_termios = tty_std_termios;
1897 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1898 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1899 m->tty_modem->driver_name = "isdn_tty";
1900 tty_set_operations(m->tty_modem, &modem_ops);
1901 retval = tty_register_driver(m->tty_modem);
1902 if (retval) {
1903 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1904 goto err;
1905 }
1906 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1907 info = &m->info[i];
1908 #ifdef CONFIG_ISDN_TTY_FAX
1909 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1910 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1911 retval = -ENOMEM;
1912 goto err_unregister;
1913 }
1914 #endif
1915 #ifdef MODULE
1916 info->owner = THIS_MODULE;
1917 #endif
1918 spin_lock_init(&info->readlock);
1919 init_MUTEX(&info->write_sem);
1920 sprintf(info->last_cause, "0000");
1921 sprintf(info->last_num, "none");
1922 info->last_dir = 0;
1923 info->last_lhup = 1;
1924 info->last_l2 = -1;
1925 info->last_si = 0;
1926 isdn_tty_reset_profile(&info->emu);
1927 isdn_tty_modem_reset_regs(info, 1);
1928 info->magic = ISDN_ASYNC_MAGIC;
1929 info->line = i;
1930 info->tty = NULL;
1931 info->x_char = 0;
1932 info->count = 0;
1933 info->blocked_open = 0;
1934 init_waitqueue_head(&info->open_wait);
1935 init_waitqueue_head(&info->close_wait);
1936 info->isdn_driver = -1;
1937 info->isdn_channel = -1;
1938 info->drv_index = -1;
1939 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1940 init_timer(&info->nc_timer);
1941 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1942 info->nc_timer.data = (unsigned long) info;
1943 skb_queue_head_init(&info->xmit_queue);
1944 #ifdef CONFIG_ISDN_AUDIO
1945 skb_queue_head_init(&info->dtmf_queue);
1946 #endif
1947 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1948 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1949 retval = -ENOMEM;
1950 goto err_unregister;
1951 }
1952 /* Make room for T.70 header */
1953 info->xmit_buf += 4;
1954 }
1955 return 0;
1956 err_unregister:
1957 for (i--; i >= 0; i--) {
1958 info = &m->info[i];
1959 #ifdef CONFIG_ISDN_TTY_FAX
1960 kfree(info->fax);
1961 #endif
1962 kfree(info->xmit_buf - 4);
1963 }
1964 tty_unregister_driver(m->tty_modem);
1965 err:
1966 put_tty_driver(m->tty_modem);
1967 m->tty_modem = NULL;
1968 return retval;
1969 }
1970
1971 void
1972 isdn_tty_exit(void)
1973 {
1974 modem_info *info;
1975 int i;
1976
1977 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1978 info = &dev->mdm.info[i];
1979 isdn_tty_cleanup_xmit(info);
1980 #ifdef CONFIG_ISDN_TTY_FAX
1981 kfree(info->fax);
1982 #endif
1983 kfree(info->xmit_buf - 4);
1984 }
1985 tty_unregister_driver(dev->mdm.tty_modem);
1986 put_tty_driver(dev->mdm.tty_modem);
1987 dev->mdm.tty_modem = NULL;
1988 }
1989
1990
1991 /*
1992 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1993 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1994 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1995 */
1996
1997 static int
1998 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1999 {
2000 #ifdef ISDN_DEBUG_MODEM_ICALL
2001 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
2002 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
2003 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
2004 #endif
2005 if (strlen(emu->lmsn)) {
2006 char *p = emu->lmsn;
2007 char *q;
2008 int tmp;
2009 int ret = 0;
2010
2011 while (1) {
2012 if ((q = strchr(p, ';')))
2013 *q = '\0';
2014 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2015 ret = tmp;
2016 #ifdef ISDN_DEBUG_MODEM_ICALL
2017 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2018 p, isdn_map_eaz2msn(emu->msn, di), tmp);
2019 #endif
2020 if (q) {
2021 *q = ';';
2022 p = q;
2023 p++;
2024 }
2025 if (!tmp)
2026 return 0;
2027 if (!q)
2028 break;
2029 }
2030 return ret;
2031 } else {
2032 int tmp;
2033 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2034 #ifdef ISDN_DEBUG_MODEM_ICALL
2035 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2036 isdn_map_eaz2msn(emu->msn, di), tmp);
2037 #endif
2038 return tmp;
2039 }
2040 }
2041
2042 /*
2043 * An incoming call-request has arrived.
2044 * Search the tty-devices for an appropriate device and bind
2045 * it to the ISDN-Channel.
2046 * Return:
2047 *
2048 * 0 = No matching device found.
2049 * 1 = A matching device found.
2050 * 3 = No match found, but eventually would match, if
2051 * CID is longer.
2052 */
2053 int
2054 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2055 {
2056 char *eaz;
2057 int i;
2058 int wret;
2059 int idx;
2060 int si1;
2061 int si2;
2062 char *nr;
2063 ulong flags;
2064
2065 if (!setup->phone[0]) {
2066 nr = "0";
2067 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2068 } else
2069 nr = setup->phone;
2070 si1 = (int) setup->si1;
2071 si2 = (int) setup->si2;
2072 if (!setup->eazmsn[0]) {
2073 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2074 eaz = "0";
2075 } else
2076 eaz = setup->eazmsn;
2077 #ifdef ISDN_DEBUG_MODEM_ICALL
2078 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2079 #endif
2080 wret = 0;
2081 spin_lock_irqsave(&dev->lock, flags);
2082 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2083 modem_info *info = &dev->mdm.info[i];
2084
2085 if (info->count == 0)
2086 continue;
2087 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
2088 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
2089 idx = isdn_dc2minor(di, ch);
2090 #ifdef ISDN_DEBUG_MODEM_ICALL
2091 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2092 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2093 info->flags, info->isdn_driver, info->isdn_channel,
2094 dev->usage[idx]);
2095 #endif
2096 if (
2097 #ifndef FIX_FILE_TRANSFER
2098 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2099 #endif
2100 (info->isdn_driver == -1) &&
2101 (info->isdn_channel == -1) &&
2102 (USG_NONE(dev->usage[idx]))) {
2103 int matchret;
2104
2105 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2106 wret = matchret;
2107 if (!matchret) { /* EAZ is matching */
2108 info->isdn_driver = di;
2109 info->isdn_channel = ch;
2110 info->drv_index = idx;
2111 dev->m_idx[idx] = info->line;
2112 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2113 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2114 strcpy(dev->num[idx], nr);
2115 strcpy(info->emu.cpn, eaz);
2116 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2117 info->emu.mdmreg[REG_PLAN] = setup->plan;
2118 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2119 isdn_info_update();
2120 spin_unlock_irqrestore(&dev->lock, flags);
2121 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2122 info->line);
2123 info->msr |= UART_MSR_RI;
2124 isdn_tty_modem_result(RESULT_RING, info);
2125 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2126 return 1;
2127 }
2128 }
2129 }
2130 }
2131 spin_unlock_irqrestore(&dev->lock, flags);
2132 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2133 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2134 return (wret == 2)?3:0;
2135 }
2136
2137 #define TTY_IS_ACTIVE(info) \
2138 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2139
2140 int
2141 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2142 {
2143 int mi;
2144 modem_info *info;
2145 char *e;
2146
2147 if (i < 0)
2148 return 0;
2149 if ((mi = dev->m_idx[i]) >= 0) {
2150 info = &dev->mdm.info[mi];
2151 switch (c->command) {
2152 case ISDN_STAT_CINF:
2153 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2154 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2155 if (e == (char *)c->parm.num)
2156 info->emu.charge = 0;
2157
2158 break;
2159 case ISDN_STAT_BSENT:
2160 #ifdef ISDN_TTY_STAT_DEBUG
2161 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2162 #endif
2163 if ((info->isdn_driver == c->driver) &&
2164 (info->isdn_channel == c->arg)) {
2165 info->msr |= UART_MSR_CTS;
2166 if (info->send_outstanding)
2167 if (!(--info->send_outstanding))
2168 info->lsr |= UART_LSR_TEMT;
2169 isdn_tty_tint(info);
2170 return 1;
2171 }
2172 break;
2173 case ISDN_STAT_CAUSE:
2174 #ifdef ISDN_TTY_STAT_DEBUG
2175 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2176 #endif
2177 /* Signal cause to tty-device */
2178 strncpy(info->last_cause, c->parm.num, 5);
2179 return 1;
2180 case ISDN_STAT_DISPLAY:
2181 #ifdef ISDN_TTY_STAT_DEBUG
2182 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2183 #endif
2184 /* Signal display to tty-device */
2185 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2186 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2187 isdn_tty_at_cout("\r\n", info);
2188 isdn_tty_at_cout("DISPLAY: ", info);
2189 isdn_tty_at_cout(c->parm.display, info);
2190 isdn_tty_at_cout("\r\n", info);
2191 }
2192 return 1;
2193 case ISDN_STAT_DCONN:
2194 #ifdef ISDN_TTY_STAT_DEBUG
2195 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2196 #endif
2197 if (TTY_IS_ACTIVE(info)) {
2198 if (info->dialing == 1) {
2199 info->dialing = 2;
2200 return 1;
2201 }
2202 }
2203 break;
2204 case ISDN_STAT_DHUP:
2205 #ifdef ISDN_TTY_STAT_DEBUG
2206 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2207 #endif
2208 if (TTY_IS_ACTIVE(info)) {
2209 if (info->dialing == 1)
2210 isdn_tty_modem_result(RESULT_BUSY, info);
2211 if (info->dialing > 1)
2212 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2213 info->dialing = 0;
2214 #ifdef ISDN_DEBUG_MODEM_HUP
2215 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2216 #endif
2217 isdn_tty_modem_hup(info, 0);
2218 return 1;
2219 }
2220 break;
2221 case ISDN_STAT_BCONN:
2222 #ifdef ISDN_TTY_STAT_DEBUG
2223 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2224 #endif
2225 /* Wake up any processes waiting
2226 * for incoming call of this device when
2227 * DCD follow the state of incoming carrier
2228 */
2229 if (info->blocked_open &&
2230 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2231 wake_up_interruptible(&info->open_wait);
2232 }
2233
2234 /* Schedule CONNECT-Message to any tty
2235 * waiting for it and
2236 * set DCD-bit of its modem-status.
2237 */
2238 if (TTY_IS_ACTIVE(info) ||
2239 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2240 info->msr |= UART_MSR_DCD;
2241 info->emu.charge = 0;
2242 if (info->dialing & 0xf)
2243 info->last_dir = 1;
2244 else
2245 info->last_dir = 0;
2246 info->dialing = 0;
2247 info->rcvsched = 1;
2248 if (USG_MODEM(dev->usage[i])) {
2249 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2250 strcpy(info->emu.connmsg, c->parm.num);
2251 isdn_tty_modem_result(RESULT_CONNECT, info);
2252 } else
2253 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2254 }
2255 if (USG_VOICE(dev->usage[i]))
2256 isdn_tty_modem_result(RESULT_VCON, info);
2257 return 1;
2258 }
2259 break;
2260 case ISDN_STAT_BHUP:
2261 #ifdef ISDN_TTY_STAT_DEBUG
2262 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2263 #endif
2264 if (TTY_IS_ACTIVE(info)) {
2265 #ifdef ISDN_DEBUG_MODEM_HUP
2266 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2267 #endif
2268 isdn_tty_modem_hup(info, 0);
2269 return 1;
2270 }
2271 break;
2272 case ISDN_STAT_NODCH:
2273 #ifdef ISDN_TTY_STAT_DEBUG
2274 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2275 #endif
2276 if (TTY_IS_ACTIVE(info)) {
2277 if (info->dialing) {
2278 info->dialing = 0;
2279 info->last_l2 = -1;
2280 info->last_si = 0;
2281 sprintf(info->last_cause, "0000");
2282 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2283 }
2284 isdn_tty_modem_hup(info, 0);
2285 return 1;
2286 }
2287 break;
2288 case ISDN_STAT_UNLOAD:
2289 #ifdef ISDN_TTY_STAT_DEBUG
2290 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2291 #endif
2292 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2293 info = &dev->mdm.info[i];
2294 if (info->isdn_driver == c->driver) {
2295 if (info->online)
2296 isdn_tty_modem_hup(info, 1);
2297 }
2298 }
2299 return 1;
2300 #ifdef CONFIG_ISDN_TTY_FAX
2301 case ISDN_STAT_FAXIND:
2302 if (TTY_IS_ACTIVE(info)) {
2303 isdn_tty_fax_command(info, c);
2304 }
2305 break;
2306 #endif
2307 #ifdef CONFIG_ISDN_AUDIO
2308 case ISDN_STAT_AUDIO:
2309 if (TTY_IS_ACTIVE(info)) {
2310 switch(c->parm.num[0]) {
2311 case ISDN_AUDIO_DTMF:
2312 if (info->vonline) {
2313 isdn_audio_put_dle_code(info,
2314 c->parm.num[1]);
2315 }
2316 break;
2317 }
2318 }
2319 break;
2320 #endif
2321 }
2322 }
2323 return 0;
2324 }
2325
2326 /*********************************************************************
2327 Modem-Emulator-Routines
2328 *********************************************************************/
2329
2330 #define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2331
2332 /*
2333 * Put a message from the AT-emulator into receive-buffer of tty,
2334 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2335 */
2336 void
2337 isdn_tty_at_cout(char *msg, modem_info * info)
2338 {
2339 struct tty_struct *tty;
2340 atemu *m = &info->emu;
2341 char *p;
2342 char c;
2343 u_long flags;
2344 struct sk_buff *skb = NULL;
2345 char *sp = NULL;
2346 int l;
2347
2348 if (!msg) {
2349 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2350 return;
2351 }
2352
2353 l = strlen(msg);
2354
2355 spin_lock_irqsave(&info->readlock, flags);
2356 tty = info->tty;
2357 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2358 spin_unlock_irqrestore(&info->readlock, flags);
2359 return;
2360 }
2361
2362 /* use queue instead of direct, if online and */
2363 /* data is in queue or buffer is full */
2364 if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2365 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2366 skb = alloc_skb(l, GFP_ATOMIC);
2367 if (!skb) {
2368 spin_unlock_irqrestore(&info->readlock, flags);
2369 return;
2370 }
2371 sp = skb_put(skb, l);
2372 #ifdef CONFIG_ISDN_AUDIO
2373 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2374 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2375 #endif
2376 }
2377
2378 for (p = msg; *p; p++) {
2379 switch (*p) {
2380 case '\r':
2381 c = m->mdmreg[REG_CR];
2382 break;
2383 case '\n':
2384 c = m->mdmreg[REG_LF];
2385 break;
2386 case '\b':
2387 c = m->mdmreg[REG_BS];
2388 break;
2389 default:
2390 c = *p;
2391 }
2392 if (skb) {
2393 *sp++ = c;
2394 } else {
2395 if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
2396 break;
2397 }
2398 }
2399 if (skb) {
2400 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2401 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2402 spin_unlock_irqrestore(&info->readlock, flags);
2403 /* Schedule dequeuing */
2404 if (dev->modempoll && info->rcvsched)
2405 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2406
2407 } else {
2408 spin_unlock_irqrestore(&info->readlock, flags);
2409 tty_flip_buffer_push(tty);
2410 }
2411 }
2412
2413 /*
2414 * Perform ATH Hangup
2415 */
2416 static void
2417 isdn_tty_on_hook(modem_info * info)
2418 {
2419 if (info->isdn_channel >= 0) {
2420 #ifdef ISDN_DEBUG_MODEM_HUP
2421 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2422 #endif
2423 isdn_tty_modem_hup(info, 1);
2424 }
2425 }
2426
2427 static void
2428 isdn_tty_off_hook(void)
2429 {
2430 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2431 }
2432
2433 #define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
2434 #define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
2435
2436 /*
2437 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2438 * isdn_tty_modem_escape() if sequence found.
2439 *
2440 * Parameters:
2441 * p pointer to databuffer
2442 * plus escape-character
2443 * count length of buffer
2444 * pluscount count of valid escape-characters so far
2445 * lastplus timestamp of last character
2446 */
2447 static void
2448 isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2449 u_long *lastplus)
2450 {
2451 if (plus > 127)
2452 return;
2453 if (count > 3) {
2454 p += count - 3;
2455 count = 3;
2456 *pluscount = 0;
2457 }
2458 while (count > 0) {
2459 if (*(p++) == plus) {
2460 if ((*pluscount)++) {
2461 /* Time since last '+' > 0.5 sec. ? */
2462 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2463 *pluscount = 1;
2464 } else {
2465 /* Time since last non-'+' < 1.5 sec. ? */
2466 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2467 *pluscount = 0;
2468 }
2469 if ((*pluscount == 3) && (count == 1))
2470 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2471 if (*pluscount > 3)
2472 *pluscount = 1;
2473 } else
2474 *pluscount = 0;
2475 *lastplus = jiffies;
2476 count--;
2477 }
2478 }
2479
2480 /*
2481 * Return result of AT-emulator to tty-receive-buffer, depending on
2482 * modem-register 12, bit 0 and 1.
2483 * For CONNECT-messages also switch to online-mode.
2484 * For RING-message handle auto-ATA if register 0 != 0
2485 */
2486
2487 static void
2488 isdn_tty_modem_result(int code, modem_info * info)
2489 {
2490 atemu *m = &info->emu;
2491 static char *msg[] =
2492 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2493 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2494 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2495 char s[ISDN_MSNLEN+10];
2496
2497 switch (code) {
2498 case RESULT_RING:
2499 m->mdmreg[REG_RINGCNT]++;
2500 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2501 /* Automatically accept incoming call */
2502 isdn_tty_cmd_ATA(info);
2503 break;
2504 case RESULT_NO_CARRIER:
2505 #ifdef ISDN_DEBUG_MODEM_HUP
2506 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2507 (info->flags & ISDN_ASYNC_CLOSING),
2508 (!info->tty));
2509 #endif
2510 m->mdmreg[REG_RINGCNT] = 0;
2511 del_timer(&info->nc_timer);
2512 info->ncarrier = 0;
2513 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2514 return;
2515 }
2516 #ifdef CONFIG_ISDN_AUDIO
2517 if (info->vonline & 1) {
2518 #ifdef ISDN_DEBUG_MODEM_VOICE
2519 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2520 info->line);
2521 #endif
2522 /* voice-recording, add DLE-ETX */
2523 isdn_tty_at_cout("\020\003", info);
2524 }
2525 if (info->vonline & 2) {
2526 #ifdef ISDN_DEBUG_MODEM_VOICE
2527 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2528 info->line);
2529 #endif
2530 /* voice-playing, add DLE-DC4 */
2531 isdn_tty_at_cout("\020\024", info);
2532 }
2533 #endif
2534 break;
2535 case RESULT_CONNECT:
2536 case RESULT_CONNECT64000:
2537 sprintf(info->last_cause, "0000");
2538 if (!info->online)
2539 info->online = 2;
2540 break;
2541 case RESULT_VCON:
2542 #ifdef ISDN_DEBUG_MODEM_VOICE
2543 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2544 info->line);
2545 #endif
2546 sprintf(info->last_cause, "0000");
2547 if (!info->online)
2548 info->online = 1;
2549 break;
2550 } /* switch(code) */
2551
2552 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2553 /* Show results */
2554 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2555 /* Show numeric results only */
2556 sprintf(s, "\r\n%d\r\n", code);
2557 isdn_tty_at_cout(s, info);
2558 } else {
2559 if (code == RESULT_RING) {
2560 /* return if "show RUNG" and ringcounter>1 */
2561 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2562 (m->mdmreg[REG_RINGCNT] > 1))
2563 return;
2564 /* print CID, _before_ _every_ ring */
2565 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2566 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2567 isdn_tty_at_cout(dev->num[info->drv_index], info);
2568 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2569 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2570 isdn_tty_at_cout(info->emu.cpn, info);
2571 }
2572 }
2573 }
2574 isdn_tty_at_cout("\r\n", info);
2575 isdn_tty_at_cout(msg[code], info);
2576 switch (code) {
2577 case RESULT_CONNECT:
2578 switch (m->mdmreg[REG_L2PROT]) {
2579 case ISDN_PROTO_L2_MODEM:
2580 isdn_tty_at_cout(" ", info);
2581 isdn_tty_at_cout(m->connmsg, info);
2582 break;
2583 }
2584 break;
2585 case RESULT_RING:
2586 /* Append CPN, if enabled */
2587 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2588 sprintf(s, "/%s", m->cpn);
2589 isdn_tty_at_cout(s, info);
2590 }
2591 /* Print CID only once, _after_ 1st RING */
2592 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2593 (m->mdmreg[REG_RINGCNT] == 1)) {
2594 isdn_tty_at_cout("\r\n", info);
2595 isdn_tty_at_cout("CALLER NUMBER: ", info);
2596 isdn_tty_at_cout(dev->num[info->drv_index], info);
2597 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2598 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2599 isdn_tty_at_cout(info->emu.cpn, info);
2600 }
2601 }
2602 break;
2603 case RESULT_NO_CARRIER:
2604 case RESULT_NO_DIALTONE:
2605 case RESULT_BUSY:
2606 case RESULT_NO_ANSWER:
2607 m->mdmreg[REG_RINGCNT] = 0;
2608 /* Append Cause-Message if enabled */
2609 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2610 sprintf(s, "/%s", info->last_cause);
2611 isdn_tty_at_cout(s, info);
2612 }
2613 break;
2614 case RESULT_CONNECT64000:
2615 /* Append Protocol to CONNECT message */
2616 switch (m->mdmreg[REG_L2PROT]) {
2617 case ISDN_PROTO_L2_X75I:
2618 case ISDN_PROTO_L2_X75UI:
2619 case ISDN_PROTO_L2_X75BUI:
2620 isdn_tty_at_cout("/X.75", info);
2621 break;
2622 case ISDN_PROTO_L2_HDLC:
2623 isdn_tty_at_cout("/HDLC", info);
2624 break;
2625 case ISDN_PROTO_L2_V11096:
2626 isdn_tty_at_cout("/V110/9600", info);
2627 break;
2628 case ISDN_PROTO_L2_V11019:
2629 isdn_tty_at_cout("/V110/19200", info);
2630 break;
2631 case ISDN_PROTO_L2_V11038:
2632 isdn_tty_at_cout("/V110/38400", info);
2633 break;
2634 }
2635 if (m->mdmreg[REG_T70] & BIT_T70) {
2636 isdn_tty_at_cout("/T.70", info);
2637 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2638 isdn_tty_at_cout("+", info);
2639 }
2640 break;
2641 }
2642 isdn_tty_at_cout("\r\n", info);
2643 }
2644 }
2645 if (code == RESULT_NO_CARRIER) {
2646 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2647 return;
2648 }
2649 tty_ldisc_flush(info->tty);
2650 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2651 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2652 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2653 tty_hangup(info->tty);
2654 }
2655 }
2656 }
2657
2658
2659 /*
2660 * Display a modem-register-value.
2661 */
2662 static void
2663 isdn_tty_show_profile(int ridx, modem_info * info)
2664 {
2665 char v[6];
2666
2667 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2668 isdn_tty_at_cout(v, info);
2669 }
2670
2671 /*
2672 * Get MSN-string from char-pointer, set pointer to end of number
2673 */
2674 static void
2675 isdn_tty_get_msnstr(char *n, char **p)
2676 {
2677 int limit = ISDN_MSNLEN - 1;
2678
2679 while (((*p[0] >= '0' && *p[0] <= '9') ||
2680 /* Why a comma ??? */
2681 (*p[0] == ',') || (*p[0] == ':')) &&
2682 (limit--))
2683 *n++ = *p[0]++;
2684 *n = '\0';
2685 }
2686
2687 /*
2688 * Get phone-number from modem-commandbuffer
2689 */
2690 static void
2691 isdn_tty_getdial(char *p, char *q,int cnt)
2692 {
2693 int first = 1;
2694 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2695 buffer overflow */
2696
2697 while (strchr(" 0123456789,#.*WPTS-", *p) && *p && --cnt>0) {
2698 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2699 (*p == '*') || (*p == '#')) {
2700 *q++ = *p;
2701 limit--;
2702 }
2703 if(!limit)
2704 break;
2705 p++;
2706 first = 0;
2707 }
2708 *q = 0;
2709 }
2710
2711 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2712 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2713
2714 static void
2715 isdn_tty_report(modem_info * info)
2716 {
2717 atemu *m = &info->emu;
2718 char s[80];
2719
2720 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2721 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2722 isdn_tty_at_cout(s, info);
2723 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2724 isdn_tty_at_cout(s, info);
2725 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2726 switch (info->last_l2) {
2727 case ISDN_PROTO_L2_X75I:
2728 isdn_tty_at_cout("X.75i", info);
2729 break;
2730 case ISDN_PROTO_L2_X75UI:
2731 isdn_tty_at_cout("X.75ui", info);
2732 break;
2733 case ISDN_PROTO_L2_X75BUI:
2734 isdn_tty_at_cout("X.75bui", info);
2735 break;
2736 case ISDN_PROTO_L2_HDLC:
2737 isdn_tty_at_cout("HDLC", info);
2738 break;
2739 case ISDN_PROTO_L2_V11096:
2740 isdn_tty_at_cout("V.110 9600 Baud", info);
2741 break;
2742 case ISDN_PROTO_L2_V11019:
2743 isdn_tty_at_cout("V.110 19200 Baud", info);
2744 break;
2745 case ISDN_PROTO_L2_V11038:
2746 isdn_tty_at_cout("V.110 38400 Baud", info);
2747 break;
2748 case ISDN_PROTO_L2_TRANS:
2749 isdn_tty_at_cout("transparent", info);
2750 break;
2751 case ISDN_PROTO_L2_MODEM:
2752 isdn_tty_at_cout("modem", info);
2753 break;
2754 case ISDN_PROTO_L2_FAX:
2755 isdn_tty_at_cout("fax", info);
2756 break;
2757 default:
2758 isdn_tty_at_cout("unknown", info);
2759 break;
2760 }
2761 if (m->mdmreg[REG_T70] & BIT_T70) {
2762 isdn_tty_at_cout("/T.70", info);
2763 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2764 isdn_tty_at_cout("+", info);
2765 }
2766 isdn_tty_at_cout("\r\n", info);
2767 isdn_tty_at_cout(" Service: ", info);
2768 switch (info->last_si) {
2769 case 1:
2770 isdn_tty_at_cout("audio\r\n", info);
2771 break;
2772 case 5:
2773 isdn_tty_at_cout("btx\r\n", info);
2774 break;
2775 case 7:
2776 isdn_tty_at_cout("data\r\n", info);
2777 break;
2778 default:
2779 sprintf(s, "%d\r\n", info->last_si);
2780 isdn_tty_at_cout(s, info);
2781 break;
2782 }
2783 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2784 isdn_tty_at_cout(s, info);
2785 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2786 isdn_tty_at_cout(s, info);
2787 }
2788
2789 /*
2790 * Parse AT&.. commands.
2791 */
2792 static int
2793 isdn_tty_cmd_ATand(char **p, modem_info * info)
2794 {
2795 atemu *m = &info->emu;
2796 int i;
2797 char rb[100];
2798
2799 #define MAXRB (sizeof(rb) - 1)
2800
2801 switch (*p[0]) {
2802 case 'B':
2803 /* &B - Set Buffersize */
2804 p[0]++;
2805 i = isdn_getnum(p);
2806 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2807 PARSE_ERROR1;
2808 #ifdef CONFIG_ISDN_AUDIO
2809 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2810 PARSE_ERROR1;
2811 #endif
2812 m->mdmreg[REG_PSIZE] = i / 16;
2813 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2814 switch (m->mdmreg[REG_L2PROT]) {
2815 case ISDN_PROTO_L2_V11096:
2816 case ISDN_PROTO_L2_V11019:
2817 case ISDN_PROTO_L2_V11038:
2818 info->xmit_size /= 10;
2819 }
2820 break;
2821 case 'C':
2822 /* &C - DCD Status */
2823 p[0]++;
2824 switch (isdn_getnum(p)) {
2825 case 0:
2826 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2827 break;
2828 case 1:
2829 m->mdmreg[REG_DCD] |= BIT_DCD;
2830 break;
2831 default:
2832 PARSE_ERROR1
2833 }
2834 break;
2835 case 'D':
2836 /* &D - Set DTR-Low-behavior */
2837 p[0]++;
2838 switch (isdn_getnum(p)) {
2839 case 0:
2840 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2841 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2842 break;
2843 case 2:
2844 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2845 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2846 break;
2847 case 3:
2848 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2849 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2850 break;
2851 default:
2852 PARSE_ERROR1
2853 }
2854 break;
2855 case 'E':
2856 /* &E -Set EAZ/MSN */
2857 p[0]++;
2858 isdn_tty_get_msnstr(m->msn, p);
2859 break;
2860 case 'F':
2861 /* &F -Set Factory-Defaults */
2862 p[0]++;
2863 if (info->msr & UART_MSR_DCD)
2864 PARSE_ERROR1;
2865 isdn_tty_reset_profile(m);
2866 isdn_tty_modem_reset_regs(info, 1);
2867 break;
2868 #ifdef DUMMY_HAYES_AT
2869 case 'K':
2870 /* only for be compilant with common scripts */
2871 /* &K Flowcontrol - no function */
2872 p[0]++;
2873 isdn_getnum(p);
2874 break;
2875 #endif
2876 case 'L':
2877 /* &L -Set Numbers to listen on */
2878 p[0]++;
2879 i = 0;
2880 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2881 (i < ISDN_LMSNLEN - 1))
2882 m->lmsn[i++] = *p[0]++;
2883 m->lmsn[i] = '\0';
2884 break;
2885 case 'R':
2886 /* &R - Set V.110 bitrate adaption */
2887 p[0]++;
2888 i = isdn_getnum(p);
2889 switch (i) {
2890 case 0:
2891 /* Switch off V.110, back to X.75 */
2892 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2893 m->mdmreg[REG_SI2] = 0;
2894 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2895 break;
2896 case 9600:
2897 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2898 m->mdmreg[REG_SI2] = 197;
2899 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2900 break;
2901 case 19200:
2902 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2903 m->mdmreg[REG_SI2] = 199;
2904 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2905 break;
2906 case 38400:
2907 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2908 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2909 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2910 break;
2911 default:
2912 PARSE_ERROR1;
2913 }
2914 /* Switch off T.70 */
2915 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2916 /* Set Service 7 */
2917 m->mdmreg[REG_SI1] |= 4;
2918 break;
2919 case 'S':
2920 /* &S - Set Windowsize */
2921 p[0]++;
2922 i = isdn_getnum(p);
2923 if ((i > 0) && (i < 9))
2924 m->mdmreg[REG_WSIZE] = i;
2925 else
2926 PARSE_ERROR1;
2927 break;
2928 case 'V':
2929 /* &V - Show registers */
2930 p[0]++;
2931 isdn_tty_at_cout("\r\n", info);
2932 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2933 sprintf(rb, "S%02d=%03d%s", i,
2934 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2935 isdn_tty_at_cout(rb, info);
2936 }
2937 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2938 strlen(m->msn) ? m->msn : "None");
2939 isdn_tty_at_cout(rb, info);
2940 if (strlen(m->lmsn)) {
2941 isdn_tty_at_cout("\r\nListen: ", info);
2942 isdn_tty_at_cout(m->lmsn, info);
2943 isdn_tty_at_cout("\r\n", info);
2944 }
2945 break;
2946 case 'W':
2947 /* &W - Write Profile */
2948 p[0]++;
2949 switch (*p[0]) {
2950 case '0':
2951 p[0]++;
2952 modem_write_profile(m);
2953 break;
2954 default:
2955 PARSE_ERROR1;
2956 }
2957 break;
2958 case 'X':
2959 /* &X - Switch to BTX-Mode and T.70 */
2960 p[0]++;
2961 switch (isdn_getnum(p)) {
2962 case 0:
2963 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2964 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2965 break;
2966 case 1:
2967 m->mdmreg[REG_T70] |= BIT_T70;
2968 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2969 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2970 info->xmit_size = 112;
2971 m->mdmreg[REG_SI1] = 4;
2972 m->mdmreg[REG_SI2] = 0;
2973 break;
2974 case 2:
2975 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2976 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2977 info->xmit_size = 112;
2978 m->mdmreg[REG_SI1] = 4;
2979 m->mdmreg[REG_SI2] = 0;
2980 break;
2981 default:
2982 PARSE_ERROR1;
2983 }
2984 break;
2985 default:
2986 PARSE_ERROR1;
2987 }
2988 return 0;
2989 }
2990
2991 static int
2992 isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
2993 {
2994 /* Some plausibility checks */
2995 switch (mreg) {
2996 case REG_L2PROT:
2997 if (mval > ISDN_PROTO_L2_MAX)
2998 return 1;
2999 break;
3000 case REG_PSIZE:
3001 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
3002 return 1;
3003 #ifdef CONFIG_ISDN_AUDIO
3004 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
3005 return 1;
3006 #endif
3007 info->xmit_size = mval * 16;
3008 switch (m->mdmreg[REG_L2PROT]) {
3009 case ISDN_PROTO_L2_V11096:
3010 case ISDN_PROTO_L2_V11019:
3011 case ISDN_PROTO_L2_V11038:
3012 info->xmit_size /= 10;
3013 }
3014 break;
3015 case REG_SI1I:
3016 case REG_PLAN:
3017 case REG_SCREEN:
3018 /* readonly registers */
3019 return 1;
3020 }
3021 return 0;
3022 }
3023
3024 /*
3025 * Perform ATS command
3026 */
3027 static int
3028 isdn_tty_cmd_ATS(char **p, modem_info * info)
3029 {
3030 atemu *m = &info->emu;
3031 int bitpos;
3032 int mreg;
3033 int mval;
3034 int bval;
3035
3036 mreg = isdn_getnum(p);
3037 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3038 PARSE_ERROR1;
3039 switch (*p[0]) {
3040 case '=':
3041 p[0]++;
3042 mval = isdn_getnum(p);
3043 if (mval < 0 || mval > 255)
3044 PARSE_ERROR1;
3045 if (isdn_tty_check_ats(mreg, mval, info, m))
3046 PARSE_ERROR1;
3047 m->mdmreg[mreg] = mval;
3048 break;
3049 case '.':
3050 /* Set/Clear a single bit */
3051 p[0]++;
3052 bitpos = isdn_getnum(p);
3053 if ((bitpos < 0) || (bitpos > 7))
3054 PARSE_ERROR1;
3055 switch (*p[0]) {
3056 case '=':
3057 p[0]++;
3058 bval = isdn_getnum(p);
3059 if (bval < 0 || bval > 1)
3060 PARSE_ERROR1;
3061 if (bval)
3062 mval = m->mdmreg[mreg] | (1 << bitpos);
3063 else
3064 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3065 if (isdn_tty_check_ats(mreg, mval, info, m))
3066 PARSE_ERROR1;
3067 m->mdmreg[mreg] = mval;
3068 break;
3069 case '?':
3070 p[0]++;
3071 isdn_tty_at_cout("\r\n", info);
3072 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3073 info);
3074 break;
3075 default:
3076 PARSE_ERROR1;
3077 }
3078 break;
3079 case '?':
3080 p[0]++;
3081 isdn_tty_show_profile(mreg, info);
3082 break;
3083 default:
3084 PARSE_ERROR1;
3085 break;
3086 }
3087 return 0;
3088 }
3089
3090 /*
3091 * Perform ATA command
3092 */
3093 static void
3094 isdn_tty_cmd_ATA(modem_info * info)
3095 {
3096 atemu *m = &info->emu;
3097 isdn_ctrl cmd;
3098 int l2;
3099
3100 if (info->msr & UART_MSR_RI) {
3101 /* Accept incoming call */
3102 info->last_dir = 0;
3103 strcpy(info->last_num, dev->num[info->drv_index]);
3104 m->mdmreg[REG_RINGCNT] = 0;
3105 info->msr &= ~UART_MSR_RI;
3106 l2 = m->mdmreg[REG_L2PROT];
3107 #ifdef CONFIG_ISDN_AUDIO
3108 /* If more than one bit set in reg18, autoselect Layer2 */
3109 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3110 if (m->mdmreg[REG_SI1I] == 1) {
3111 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3112 l2 = ISDN_PROTO_L2_TRANS;
3113 } else
3114 l2 = ISDN_PROTO_L2_X75I;
3115 }
3116 #endif
3117 cmd.driver = info->isdn_driver;
3118 cmd.command = ISDN_CMD_SETL2;
3119 cmd.arg = info->isdn_channel + (l2 << 8);
3120 info->last_l2 = l2;
3121 isdn_command(&cmd);
3122 cmd.driver = info->isdn_driver;
3123 cmd.command = ISDN_CMD_SETL3;
3124 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3125 #ifdef CONFIG_ISDN_TTY_FAX
3126 if (l2 == ISDN_PROTO_L2_FAX) {
3127 cmd.parm.fax = info->fax;
3128 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3129 }
3130 #endif
3131 isdn_command(&cmd);
3132 cmd.driver = info->isdn_driver;
3133 cmd.arg = info->isdn_channel;
3134 cmd.command = ISDN_CMD_ACCEPTD;
3135 info->dialing = 16;
3136 info->emu.carrierwait = 0;
3137 isdn_command(&cmd);
3138 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3139 } else
3140 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3141 }
3142
3143 #ifdef CONFIG_ISDN_AUDIO
3144 /*
3145 * Parse AT+F.. commands
3146 */
3147 static int
3148 isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3149 {
3150 atemu *m = &info->emu;
3151 char rs[20];
3152
3153 if (!strncmp(p[0], "CLASS", 5)) {
3154 p[0] += 5;
3155 switch (*p[0]) {
3156 case '?':
3157 p[0]++;
3158 sprintf(rs, "\r\n%d",
3159 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3160 #ifdef CONFIG_ISDN_TTY_FAX
3161 if (TTY_IS_FCLASS2(info))
3162 sprintf(rs, "\r\n2");
3163 else if (TTY_IS_FCLASS1(info))
3164 sprintf(rs, "\r\n1");
3165 #endif
3166 isdn_tty_at_cout(rs, info);
3167 break;
3168 case '=':
3169 p[0]++;
3170 switch (*p[0]) {
3171 case '0':
3172 p[0]++;
3173 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3174 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3175 m->mdmreg[REG_SI1] = 4;
3176 info->xmit_size =
3177 m->mdmreg[REG_PSIZE] * 16;
3178 break;
3179 #ifdef CONFIG_ISDN_TTY_FAX
3180 case '1':
3181 p[0]++;
3182 if (!(dev->global_features &
3183 ISDN_FEATURE_L3_FCLASS1))
3184 PARSE_ERROR1;
3185 m->mdmreg[REG_SI1] = 1;
3186 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3187 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3188 info->xmit_size =
3189 m->mdmreg[REG_PSIZE] * 16;
3190 break;
3191 case '2':
3192 p[0]++;
3193 if (!(dev->global_features &
3194 ISDN_FEATURE_L3_FCLASS2))
3195 PARSE_ERROR1;
3196 m->mdmreg[REG_SI1] = 1;
3197 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3198 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3199 info->xmit_size =
3200 m->mdmreg[REG_PSIZE] * 16;
3201 break;
3202 #endif
3203 case '8':
3204 p[0]++;
3205 /* L2 will change on dialout with si=1 */
3206 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3207 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3208 m->mdmreg[REG_SI1] = 5;
3209 info->xmit_size = VBUF;
3210 break;
3211 case '?':
3212 p[0]++;
3213 strcpy(rs, "\r\n0,");
3214 #ifdef CONFIG_ISDN_TTY_FAX
3215 if (dev->global_features &
3216 ISDN_FEATURE_L3_FCLASS1)
3217 strcat(rs, "1,");
3218 if (dev->global_features &
3219 ISDN_FEATURE_L3_FCLASS2)
3220 strcat(rs, "2,");
3221 #endif
3222 strcat(rs, "8");
3223 isdn_tty_at_cout(rs, info);
3224 break;
3225 default:
3226 PARSE_ERROR1;
3227 }
3228 break;
3229 default:
3230 PARSE_ERROR1;
3231 }
3232 return 0;
3233 }
3234 #ifdef CONFIG_ISDN_TTY_FAX
3235 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3236 #else
3237 PARSE_ERROR1;
3238 #endif
3239 }
3240
3241 /*
3242 * Parse AT+V.. commands
3243 */
3244 static int
3245 isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3246 {
3247 atemu *m = &info->emu;
3248 isdn_ctrl cmd;
3249 static char *vcmd[] =
3250 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3251 int i;
3252 int par1;
3253 int par2;
3254 char rs[20];
3255
3256 i = 0;
3257 while (vcmd[i]) {
3258 if (!strncmp(vcmd[i], p[0], 2)) {
3259 p[0] += 2;
3260 break;
3261 }
3262 i++;
3263 }
3264 switch (i) {
3265 case 0:
3266 /* AT+VNH - Auto hangup feature */
3267 switch (*p[0]) {
3268 case '?':
3269 p[0]++;
3270 isdn_tty_at_cout("\r\n1", info);
3271 break;
3272 case '=':
3273 p[0]++;
3274 switch (*p[0]) {
3275 case '1':
3276 p[0]++;
3277 break;
3278 case '?':
3279 p[0]++;
3280 isdn_tty_at_cout("\r\n1", info);
3281 break;
3282 default:
3283 PARSE_ERROR1;
3284 }
3285 break;
3286 default:
3287 PARSE_ERROR1;
3288 }
3289 break;
3290 case 1:
3291 /* AT+VIP - Reset all voice parameters */
3292 isdn_tty_modem_reset_vpar(m);
3293 break;
3294 case 2:
3295 /* AT+VLS - Select device, accept incoming call */
3296 switch (*p[0]) {
3297 case '?':
3298 p[0]++;
3299 sprintf(rs, "\r\n%d", m->vpar[0]);
3300 isdn_tty_at_cout(rs, info);
3301 break;
3302 case '=':
3303 p[0]++;
3304 switch (*p[0]) {
3305 case '0':
3306 p[0]++;
3307 m->vpar[0] = 0;
3308 break;
3309 case '2':
3310 p[0]++;
3311 m->vpar[0] = 2;
3312 break;
3313 case '?':
3314 p[0]++;
3315 isdn_tty_at_cout("\r\n0,2", info);
3316 break;
3317 default:
3318 PARSE_ERROR1;
3319 }
3320 break;
3321 default:
3322 PARSE_ERROR1;
3323 }
3324 break;
3325 case 3:
3326 /* AT+VRX - Start recording */
3327 if (!m->vpar[0])
3328 PARSE_ERROR1;
3329 if (info->online != 1) {
3330 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3331 return 1;
3332 }
3333 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3334 if (!info->dtmf_state) {
3335 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3336 PARSE_ERROR1;
3337 }
3338 info->silence_state = isdn_audio_silence_init(info->silence_state);
3339 if (!info->silence_state) {
3340 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3341 PARSE_ERROR1;
3342 }
3343 if (m->vpar[3] < 5) {
3344 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3345 if (!info->adpcmr) {
3346 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3347 PARSE_ERROR1;
3348 }
3349 }
3350 #ifdef ISDN_DEBUG_AT
3351 printk(KERN_DEBUG "AT: +VRX\n");
3352 #endif
3353 info->vonline |= 1;
3354 isdn_tty_modem_result(RESULT_CONNECT, info);
3355 return 0;
3356 break;
3357 case 4:
3358 /* AT+VSD - Silence detection */
3359 switch (*p[0]) {
3360 case '?':
3361 p[0]++;
3362 sprintf(rs, "\r\n<%d>,<%d>",
3363 m->vpar[1],
3364 m->vpar[2]);
3365 isdn_tty_at_cout(rs, info);
3366 break;
3367 case '=':
3368 p[0]++;
3369 if ((*p[0]>='0') && (*p[0]<='9')) {
3370 par1 = isdn_getnum(p);
3371 if ((par1 < 0) || (par1 > 31))
3372 PARSE_ERROR1;
3373 if (*p[0] != ',')
3374 PARSE_ERROR1;
3375 p[0]++;
3376 par2 = isdn_getnum(p);
3377 if ((par2 < 0) || (par2 > 255))
3378 PARSE_ERROR1;
3379 m->vpar[1] = par1;
3380 m->vpar[2] = par2;
3381 break;
3382 } else
3383 if (*p[0] == '?') {
3384 p[0]++;
3385 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3386 info);
3387 break;
3388 } else
3389 PARSE_ERROR1;
3390 break;
3391 default:
3392 PARSE_ERROR1;
3393 }
3394 break;
3395 case 5:
3396 /* AT+VSM - Select compression */
3397 switch (*p[0]) {
3398 case '?':
3399 p[0]++;
3400 sprintf(rs, "\r\n<%d>,<%d><8000>",
3401 m->vpar[3],
3402 m->vpar[1]);
3403 isdn_tty_at_cout(rs, info);
3404 break;
3405 case '=':
3406 p[0]++;
3407 switch (*p[0]) {
3408 case '2':
3409 case '3':
3410 case '4':
3411 case '5':
3412 case '6':
3413 par1 = isdn_getnum(p);
3414 if ((par1 < 2) || (par1 > 6))
3415 PARSE_ERROR1;
3416 m->vpar[3] = par1;
3417 break;
3418 case '?':
3419 p[0]++;
3420 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3421 info);
3422 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3423 info);
3424 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3425 info);
3426 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3427 info);
3428 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3429 info);
3430 break;
3431 default:
3432 PARSE_ERROR1;
3433 }
3434 break;
3435 default:
3436 PARSE_ERROR1;
3437 }
3438 break;
3439 case 6:
3440 /* AT+VTX - Start sending */
3441 if (!m->vpar[0])
3442 PARSE_ERROR1;
3443 if (info->online != 1) {
3444 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3445 return 1;
3446 }
3447 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3448 if (!info->dtmf_state) {
3449 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3450 PARSE_ERROR1;
3451 }
3452 if (m->vpar[3] < 5) {
3453 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3454 if (!info->adpcms) {
3455 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3456 PARSE_ERROR1;
3457 }
3458 }
3459 #ifdef ISDN_DEBUG_AT
3460 printk(KERN_DEBUG "AT: +VTX\n");
3461 #endif
3462 m->lastDLE = 0;
3463 info->vonline |= 2;
3464 isdn_tty_modem_result(RESULT_CONNECT, info);
3465 return 0;
3466 break;
3467 case 7:
3468 /* AT+VDD - DTMF detection */
3469 switch (*p[0]) {
3470 case '?':
3471 p[0]++;
3472 sprintf(rs, "\r\n<%d>,<%d>",
3473 m->vpar[4],
3474 m->vpar[5]);
3475 isdn_tty_at_cout(rs, info);
3476 break;
3477 case '=':
3478 p[0]++;
3479 if ((*p[0]>='0') && (*p[0]<='9')) {
3480 if (info->online != 1)
3481 PARSE_ERROR1;
3482 par1 = isdn_getnum(p);
3483 if ((par1 < 0) || (par1 > 15))
3484 PARSE_ERROR1;
3485 if (*p[0] != ',')
3486 PARSE_ERROR1;
3487 p[0]++;
3488 par2 = isdn_getnum(p);
3489 if ((par2 < 0) || (par2 > 255))
3490 PARSE_ERROR1;
3491 m->vpar[4] = par1;
3492 m->vpar[5] = par2;
3493 cmd.driver = info->isdn_driver;
3494 cmd.command = ISDN_CMD_AUDIO;
3495 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3496 cmd.parm.num[0] = par1;
3497 cmd.parm.num[1] = par2;
3498 isdn_command(&cmd);
3499 break;
3500 } else
3501 if (*p[0] == '?') {
3502 p[0]++;
3503 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3504 info);
3505 break;
3506 } else
3507 PARSE_ERROR1;
3508 break;
3509 default:
3510 PARSE_ERROR1;
3511 }
3512 break;
3513 default:
3514 PARSE_ERROR1;
3515 }
3516 return 0;
3517 }
3518 #endif /* CONFIG_ISDN_AUDIO */
3519
3520 /*
3521 * Parse and perform an AT-command-line.
3522 */
3523 static void
3524 isdn_tty_parse_at(modem_info * info)
3525 {
3526 atemu *m = &info->emu;
3527 char *p;
3528 char ds[40];
3529
3530 #ifdef ISDN_DEBUG_AT
3531 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3532 #endif
3533 for (p = &m->mdmcmd[2]; *p;) {
3534 switch (*p) {
3535 case ' ':
3536 p++;
3537 break;
3538 case 'A':
3539 /* A - Accept incoming call */
3540 p++;
3541 isdn_tty_cmd_ATA(info);
3542 return;
3543 break;
3544 case 'D':
3545 /* D - Dial */
3546 if (info->msr & UART_MSR_DCD)
3547 PARSE_ERROR;
3548 if (info->msr & UART_MSR_RI) {
3549 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3550 return;
3551 }
3552 isdn_tty_getdial(++p, ds, sizeof ds);
3553 p += strlen(p);
3554 if (!strlen(m->msn))
3555 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3556 else if (strlen(ds))
3557 isdn_tty_dial(ds, info, m);
3558 else
3559 PARSE_ERROR;
3560 return;
3561 case 'E':
3562 /* E - Turn Echo on/off */
3563 p++;
3564 switch (isdn_getnum(&p)) {
3565 case 0:
3566 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3567 break;
3568 case 1:
3569 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3570 break;
3571 default:
3572 PARSE_ERROR;
3573 }
3574 break;
3575 case 'H':
3576 /* H - On/Off-hook */
3577 p++;
3578 switch (*p) {
3579 case '0':
3580 p++;
3581 isdn_tty_on_hook(info);
3582 break;
3583 case '1':
3584 p++;
3585 isdn_tty_off_hook();
3586 break;
3587 default:
3588 isdn_tty_on_hook(info);
3589 break;
3590 }
3591 break;
3592 case 'I':
3593 /* I - Information */
3594 p++;
3595 isdn_tty_at_cout("\r\nLinux ISDN", info);
3596 switch (*p) {
3597 case '0':
3598 case '1':
3599 p++;
3600 break;
3601 case '2':
3602 p++;
3603 isdn_tty_report(info);
3604 break;
3605 case '3':
3606 p++;
3607 sprintf(ds, "\r\n%d", info->emu.charge);
3608 isdn_tty_at_cout(ds, info);
3609 break;
3610 default:;
3611 }
3612 break;
3613 #ifdef DUMMY_HAYES_AT
3614 case 'L':
3615 case 'M':
3616 /* only for be compilant with common scripts */
3617 /* no function */
3618 p++;
3619 isdn_getnum(&p);
3620 break;
3621 #endif
3622 case 'O':
3623 /* O - Go online */
3624 p++;
3625 if (info->msr & UART_MSR_DCD)
3626 /* if B-Channel is up */
3627 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3628 else
3629 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3630 return;
3631 case 'Q':
3632 /* Q - Turn Emulator messages on/off */
3633 p++;
3634 switch (isdn_getnum(&p)) {
3635 case 0:
3636 m->mdmreg[REG_RESP] |= BIT_RESP;
3637 break;
3638 case 1:
3639 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3640 break;
3641 default:
3642 PARSE_ERROR;
3643 }
3644 break;
3645 case 'S':
3646 /* S - Set/Get Register */
3647 p++;
3648 if (isdn_tty_cmd_ATS(&p, info))
3649 return;
3650 break;
3651 case 'V':
3652 /* V - Numeric or ASCII Emulator-messages */
3653 p++;
3654 switch (isdn_getnum(&p)) {
3655 case 0:
3656 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3657 break;
3658 case 1:
3659 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3660 break;
3661 default:
3662 PARSE_ERROR;
3663 }
3664 break;
3665 case 'Z':
3666 /* Z - Load Registers from Profile */
3667 p++;
3668 if (info->msr & UART_MSR_DCD) {
3669 info->online = 0;
3670 isdn_tty_on_hook(info);
3671 }
3672 isdn_tty_modem_reset_regs(info, 1);
3673 break;
3674 case '+':
3675 p++;
3676 switch (*p) {
3677 #ifdef CONFIG_ISDN_AUDIO
3678 case 'F':
3679 p++;
3680 if (isdn_tty_cmd_PLUSF(&p, info))
3681 return;
3682 break;
3683 case 'V':
3684 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3685 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3686 PARSE_ERROR;
3687 p++;
3688 if (isdn_tty_cmd_PLUSV(&p, info))
3689 return;
3690 break;
3691 #endif /* CONFIG_ISDN_AUDIO */
3692 case 'S': /* SUSPEND */
3693 p++;
3694 isdn_tty_get_msnstr(ds, &p);
3695 isdn_tty_suspend(ds, info, m);
3696 break;
3697 case 'R': /* RESUME */
3698 p++;
3699 isdn_tty_get_msnstr(ds, &p);
3700 isdn_tty_resume(ds, info, m);
3701 break;
3702 case 'M': /* MESSAGE */
3703 p++;
3704 isdn_tty_send_msg(info, m, p);
3705 break;
3706 default:
3707 PARSE_ERROR;
3708 }
3709 break;
3710 case '&':
3711 p++;
3712 if (isdn_tty_cmd_ATand(&p, info))
3713 return;
3714 break;
3715 default:
3716 PARSE_ERROR;
3717 }
3718 }
3719 #ifdef CONFIG_ISDN_AUDIO
3720 if (!info->vonline)
3721 #endif
3722 isdn_tty_modem_result(RESULT_OK, info);
3723 }
3724
3725 /* Need own toupper() because standard-toupper is not available
3726 * within modules.
3727 */
3728 #define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3729
3730 /*
3731 * Perform line-editing of AT-commands
3732 *
3733 * Parameters:
3734 * p inputbuffer
3735 * count length of buffer
3736 * channel index to line (minor-device)
3737 */
3738 static int
3739 isdn_tty_edit_at(const char *p, int count, modem_info * info)
3740 {
3741 atemu *m = &info->emu;
3742 int total = 0;
3743 u_char c;
3744 char eb[2];
3745 int cnt;
3746
3747 for (cnt = count; cnt > 0; p++, cnt--) {
3748 c = *p;
3749 total++;
3750 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3751 /* Separator (CR or LF) */
3752 m->mdmcmd[m->mdmcmdl] = 0;
3753 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3754 eb[0] = c;
3755 eb[1] = 0;
3756 isdn_tty_at_cout(eb, info);
3757 }
3758 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3759 isdn_tty_parse_at(info);
3760 m->mdmcmdl = 0;
3761 continue;
3762 }
3763 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3764 /* Backspace-Function */
3765 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3766 if (m->mdmcmdl)
3767 m->mdmcmdl--;
3768 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3769 isdn_tty_at_cout("\b", info);
3770 }
3771 continue;
3772 }
3773 if (cmdchar(c)) {
3774 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3775 eb[0] = c;
3776 eb[1] = 0;
3777 isdn_tty_at_cout(eb, info);
3778 }
3779 if (m->mdmcmdl < 255) {
3780 c = my_toupper(c);
3781 switch (m->mdmcmdl) {
3782 case 1:
3783 if (c == 'T') {
3784 m->mdmcmd[m->mdmcmdl] = c;
3785 m->mdmcmd[++m->mdmcmdl] = 0;
3786 break;
3787 } else
3788 m->mdmcmdl = 0;
3789 /* Fall through, check for 'A' */
3790 case 0:
3791 if (c == 'A') {
3792 m->mdmcmd[m->mdmcmdl] = c;
3793 m->mdmcmd[++m->mdmcmdl] = 0;
3794 }
3795 break;
3796 default:
3797 m->mdmcmd[m->mdmcmdl] = c;
3798 m->mdmcmd[++m->mdmcmdl] = 0;
3799 }
3800 }
3801 }
3802 }
3803 return total;
3804 }
3805
3806 /*
3807 * Switch all modem-channels who are online and got a valid
3808 * escape-sequence 1.5 seconds ago, to command-mode.
3809 * This function is called every second via timer-interrupt from within
3810 * timer-dispatcher isdn_timer_function()
3811 */
3812 void
3813 isdn_tty_modem_escape(void)
3814 {
3815 int ton = 0;
3816 int i;
3817 int midx;
3818
3819 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3820 if (USG_MODEM(dev->usage[i]))
3821 if ((midx = dev->m_idx[i]) >= 0) {
3822 modem_info *info = &dev->mdm.info[midx];
3823 if (info->online) {
3824 ton = 1;
3825 if ((info->emu.pluscount == 3) &&
3826 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3827 info->emu.pluscount = 0;
3828 info->online = 0;
3829 isdn_tty_modem_result(RESULT_OK, info);
3830 }
3831 }
3832 }
3833 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3834 }
3835
3836 /*
3837 * Put a RING-message to all modem-channels who have the RI-bit set.
3838 * This function is called every second via timer-interrupt from within
3839 * timer-dispatcher isdn_timer_function()
3840 */
3841 void
3842 isdn_tty_modem_ring(void)
3843 {
3844 int ton = 0;
3845 int i;
3846
3847 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3848 modem_info *info = &dev->mdm.info[i];
3849 if (info->msr & UART_MSR_RI) {
3850 ton = 1;
3851 isdn_tty_modem_result(RESULT_RING, info);
3852 }
3853 }
3854 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3855 }
3856
3857 /*
3858 * For all online tty's, try sending data to
3859 * the lower levels.
3860 */
3861 void
3862 isdn_tty_modem_xmit(void)
3863 {
3864 int ton = 1;
3865 int i;
3866
3867 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3868 modem_info *info = &dev->mdm.info[i];
3869 if (info->online) {
3870 ton = 1;
3871 isdn_tty_senddown(info);
3872 isdn_tty_tint(info);
3873 }
3874 }
3875 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3876 }
3877
3878 /*
3879 * Check all channels if we have a 'no carrier' timeout.
3880 * Timeout value is set by Register S7.
3881 */
3882 void
3883 isdn_tty_carrier_timeout(void)
3884 {
3885 int ton = 0;
3886 int i;
3887
3888 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3889 modem_info *info = &dev->mdm.info[i];
3890 if (info->dialing) {
3891 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3892 info->dialing = 0;
3893 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3894 isdn_tty_modem_hup(info, 1);
3895 }
3896 else
3897 ton = 1;
3898 }
3899 }
3900 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3901 }
Linux kernel - Deliverables
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