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Merge branch 'misc_devel_3.4' of git://git.pwsan.com/linux-2.6 into fixes
[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/slab.h>
16 #include <linux/delay.h>
17 #include <linux/mutex.h>
18 #include "isdn_common.h"
19 #include "isdn_tty.h"
20 #ifdef CONFIG_ISDN_AUDIO
21 #include "isdn_audio.h"
22 #define VBUF 0x3e0
23 #define VBUFX (VBUF/16)
24 #endif
25
26 #define FIX_FILE_TRANSFER
27 #define DUMMY_HAYES_AT
28
29 /* Prototypes */
30
31 static DEFINE_MUTEX(modem_info_mutex);
32 static int isdn_tty_edit_at(const char *, int, modem_info *);
33 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
34 static void isdn_tty_modem_reset_regs(modem_info *, int);
35 static void isdn_tty_cmd_ATA(modem_info *);
36 static void isdn_tty_flush_buffer(struct tty_struct *);
37 static void isdn_tty_modem_result(int, modem_info *);
38 #ifdef CONFIG_ISDN_AUDIO
39 static int isdn_tty_countDLE(unsigned char *, int);
40 #endif
41
42 /* Leave this unchanged unless you know what you do! */
43 #define MODEM_PARANOIA_CHECK
44 #define MODEM_DO_RESTART
45
46 static int bit2si[8] =
47 {1, 5, 7, 7, 7, 7, 7, 7};
48 static int si2bit[8] =
49 {4, 1, 4, 4, 4, 4, 4, 4};
50
51 char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
52
53
54 /* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
55 * to stuff incoming data directly into a tty's flip-buffer. This
56 * is done to speed up tty-receiving if the receive-queue is empty.
57 * This routine MUST be called with interrupts off.
58 * Return:
59 * 1 = Success
60 * 0 = Failure, data has to be buffered and later processed by
61 * isdn_tty_readmodem().
62 */
63 static int
64 isdn_tty_try_read(modem_info *info, struct sk_buff *skb)
65 {
66 int c;
67 int len;
68 struct tty_struct *tty;
69 char last;
70
71 if (info->online) {
72 if ((tty = info->tty)) {
73 if (info->mcr & UART_MCR_RTS) {
74 len = skb->len
75 #ifdef CONFIG_ISDN_AUDIO
76 + ISDN_AUDIO_SKB_DLECOUNT(skb)
77 #endif
78 ;
79
80 c = tty_buffer_request_room(tty, len);
81 if (c >= len) {
82 #ifdef CONFIG_ISDN_AUDIO
83 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
84 int l = skb->len;
85 unsigned char *dp = skb->data;
86 while (--l) {
87 if (*dp == DLE)
88 tty_insert_flip_char(tty, DLE, 0);
89 tty_insert_flip_char(tty, *dp++, 0);
90 }
91 if (*dp == DLE)
92 tty_insert_flip_char(tty, DLE, 0);
93 last = *dp;
94 } else {
95 #endif
96 if (len > 1)
97 tty_insert_flip_string(tty, skb->data, len - 1);
98 last = skb->data[len - 1];
99 #ifdef CONFIG_ISDN_AUDIO
100 }
101 #endif
102 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
103 tty_insert_flip_char(tty, last, 0xFF);
104 else
105 tty_insert_flip_char(tty, last, TTY_NORMAL);
106 tty_flip_buffer_push(tty);
107 kfree_skb(skb);
108 return 1;
109 }
110 }
111 }
112 }
113 return 0;
114 }
115
116 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
117 * It tries getting received data from the receive queue an stuff it into
118 * the tty's flip-buffer.
119 */
120 void
121 isdn_tty_readmodem(void)
122 {
123 int resched = 0;
124 int midx;
125 int i;
126 int r;
127 struct tty_struct *tty;
128 modem_info *info;
129
130 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
131 if ((midx = dev->m_idx[i]) >= 0) {
132 info = &dev->mdm.info[midx];
133 if (info->online) {
134 r = 0;
135 #ifdef CONFIG_ISDN_AUDIO
136 isdn_audio_eval_dtmf(info);
137 if ((info->vonline & 1) && (info->emu.vpar[1]))
138 isdn_audio_eval_silence(info);
139 #endif
140 if ((tty = info->tty)) {
141 if (info->mcr & UART_MCR_RTS) {
142 /* CISCO AsyncPPP Hack */
143 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
144 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
145 else
146 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
147 if (r)
148 tty_flip_buffer_push(tty);
149 } else
150 r = 1;
151 } else
152 r = 1;
153 if (r) {
154 info->rcvsched = 0;
155 resched = 1;
156 } else
157 info->rcvsched = 1;
158 }
159 }
160 }
161 if (!resched)
162 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
163 }
164
165 int
166 isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
167 {
168 ulong flags;
169 int midx;
170 #ifdef CONFIG_ISDN_AUDIO
171 int ifmt;
172 #endif
173 modem_info *info;
174
175 if ((midx = dev->m_idx[i]) < 0) {
176 /* if midx is invalid, packet is not for tty */
177 return 0;
178 }
179 info = &dev->mdm.info[midx];
180 #ifdef CONFIG_ISDN_AUDIO
181 ifmt = 1;
182
183 if ((info->vonline) && (!info->emu.vpar[4]))
184 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
185 if ((info->vonline & 1) && (info->emu.vpar[1]))
186 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
187 #endif
188 if ((info->online < 2)
189 #ifdef CONFIG_ISDN_AUDIO
190 && (!(info->vonline & 1))
191 #endif
192 ) {
193 /* If Modem not listening, drop data */
194 kfree_skb(skb);
195 return 1;
196 }
197 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
198 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
199 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
200 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
201 skb_pull(skb, 4);
202 else
203 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
204 skb_pull(skb, 2);
205 } else
206 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
207 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
208 skb_pull(skb, 4);
209 }
210 #ifdef CONFIG_ISDN_AUDIO
211 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
212 ISDN_AUDIO_SKB_LOCK(skb) = 0;
213 if (info->vonline & 1) {
214 /* voice conversion/compression */
215 switch (info->emu.vpar[3]) {
216 case 2:
217 case 3:
218 case 4:
219 /* adpcm
220 * Since compressed data takes less
221 * space, we can overwrite the buffer.
222 */
223 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
224 ifmt,
225 skb->data,
226 skb->data,
227 skb->len));
228 break;
229 case 5:
230 /* a-law */
231 if (!ifmt)
232 isdn_audio_ulaw2alaw(skb->data, skb->len);
233 break;
234 case 6:
235 /* u-law */
236 if (ifmt)
237 isdn_audio_alaw2ulaw(skb->data, skb->len);
238 break;
239 }
240 ISDN_AUDIO_SKB_DLECOUNT(skb) =
241 isdn_tty_countDLE(skb->data, skb->len);
242 }
243 #ifdef CONFIG_ISDN_TTY_FAX
244 else {
245 if (info->faxonline & 2) {
246 isdn_tty_fax_bitorder(info, skb);
247 ISDN_AUDIO_SKB_DLECOUNT(skb) =
248 isdn_tty_countDLE(skb->data, skb->len);
249 }
250 }
251 #endif
252 #endif
253 /* Try to deliver directly via tty-buf if queue is empty */
254 spin_lock_irqsave(&info->readlock, flags);
255 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
256 if (isdn_tty_try_read(info, skb)) {
257 spin_unlock_irqrestore(&info->readlock, flags);
258 return 1;
259 }
260 /* Direct deliver failed or queue wasn't empty.
261 * Queue up for later dequeueing via timer-irq.
262 */
263 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
264 dev->drv[di]->rcvcount[channel] +=
265 (skb->len
266 #ifdef CONFIG_ISDN_AUDIO
267 + ISDN_AUDIO_SKB_DLECOUNT(skb)
268 #endif
269 );
270 spin_unlock_irqrestore(&info->readlock, flags);
271 /* Schedule dequeuing */
272 if ((dev->modempoll) && (info->rcvsched))
273 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
274 return 1;
275 }
276
277 static void
278 isdn_tty_cleanup_xmit(modem_info *info)
279 {
280 skb_queue_purge(&info->xmit_queue);
281 #ifdef CONFIG_ISDN_AUDIO
282 skb_queue_purge(&info->dtmf_queue);
283 #endif
284 }
285
286 static void
287 isdn_tty_tint(modem_info *info)
288 {
289 struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
290 int len, slen;
291
292 if (!skb)
293 return;
294 len = skb->len;
295 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
296 info->isdn_channel, 1, skb)) == len) {
297 struct tty_struct *tty = info->tty;
298 info->send_outstanding++;
299 info->msr &= ~UART_MSR_CTS;
300 info->lsr &= ~UART_LSR_TEMT;
301 tty_wakeup(tty);
302 return;
303 }
304 if (slen < 0) {
305 /* Error: no channel, already shutdown, or wrong parameter */
306 dev_kfree_skb(skb);
307 return;
308 }
309 skb_queue_head(&info->xmit_queue, skb);
310 }
311
312 #ifdef CONFIG_ISDN_AUDIO
313 static int
314 isdn_tty_countDLE(unsigned char *buf, int len)
315 {
316 int count = 0;
317
318 while (len--)
319 if (*buf++ == DLE)
320 count++;
321 return count;
322 }
323
324 /* This routine is called from within isdn_tty_write() to perform
325 * DLE-decoding when sending audio-data.
326 */
327 static int
328 isdn_tty_handleDLEdown(modem_info *info, atemu *m, int len)
329 {
330 unsigned char *p = &info->xmit_buf[info->xmit_count];
331 int count = 0;
332
333 while (len > 0) {
334 if (m->lastDLE) {
335 m->lastDLE = 0;
336 switch (*p) {
337 case DLE:
338 /* Escape code */
339 if (len > 1)
340 memmove(p, p + 1, len - 1);
341 p--;
342 count++;
343 break;
344 case ETX:
345 /* End of data */
346 info->vonline |= 4;
347 return count;
348 case DC4:
349 /* Abort RX */
350 info->vonline &= ~1;
351 #ifdef ISDN_DEBUG_MODEM_VOICE
352 printk(KERN_DEBUG
353 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
354 info->line);
355 #endif
356 isdn_tty_at_cout("\020\003", info);
357 if (!info->vonline) {
358 #ifdef ISDN_DEBUG_MODEM_VOICE
359 printk(KERN_DEBUG
360 "DLEdown: send VCON on ttyI%d\n",
361 info->line);
362 #endif
363 isdn_tty_at_cout("\r\nVCON\r\n", info);
364 }
365 /* Fall through */
366 case 'q':
367 case 's':
368 /* Silence */
369 if (len > 1)
370 memmove(p, p + 1, len - 1);
371 p--;
372 break;
373 }
374 } else {
375 if (*p == DLE)
376 m->lastDLE = 1;
377 else
378 count++;
379 }
380 p++;
381 len--;
382 }
383 if (len < 0) {
384 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
385 return 0;
386 }
387 return count;
388 }
389
390 /* This routine is called from within isdn_tty_write() when receiving
391 * audio-data. It interrupts receiving, if an character other than
392 * ^S or ^Q is sent.
393 */
394 static int
395 isdn_tty_end_vrx(const char *buf, int c)
396 {
397 char ch;
398
399 while (c--) {
400 ch = *buf;
401 if ((ch != 0x11) && (ch != 0x13))
402 return 1;
403 buf++;
404 }
405 return 0;
406 }
407
408 static int voice_cf[7] =
409 {0, 0, 4, 3, 2, 0, 0};
410
411 #endif /* CONFIG_ISDN_AUDIO */
412
413 /* isdn_tty_senddown() is called either directly from within isdn_tty_write()
414 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
415 * outgoing data from the tty's xmit-buffer, handles voice-decompression or
416 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
417 */
418 static void
419 isdn_tty_senddown(modem_info *info)
420 {
421 int buflen;
422 int skb_res;
423 #ifdef CONFIG_ISDN_AUDIO
424 int audio_len;
425 #endif
426 struct sk_buff *skb;
427
428 #ifdef CONFIG_ISDN_AUDIO
429 if (info->vonline & 4) {
430 info->vonline &= ~6;
431 if (!info->vonline) {
432 #ifdef ISDN_DEBUG_MODEM_VOICE
433 printk(KERN_DEBUG
434 "senddown: send VCON on ttyI%d\n",
435 info->line);
436 #endif
437 isdn_tty_at_cout("\r\nVCON\r\n", info);
438 }
439 }
440 #endif
441 if (!(buflen = info->xmit_count))
442 return;
443 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
444 info->msr &= ~UART_MSR_CTS;
445 info->lsr &= ~UART_LSR_TEMT;
446 /* info->xmit_count is modified here and in isdn_tty_write().
447 * So we return here if isdn_tty_write() is in the
448 * critical section.
449 */
450 atomic_inc(&info->xmit_lock);
451 if (!(atomic_dec_and_test(&info->xmit_lock)))
452 return;
453 if (info->isdn_driver < 0) {
454 info->xmit_count = 0;
455 return;
456 }
457 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
458 #ifdef CONFIG_ISDN_AUDIO
459 if (info->vonline & 2)
460 audio_len = buflen * voice_cf[info->emu.vpar[3]];
461 else
462 audio_len = 0;
463 skb = dev_alloc_skb(skb_res + buflen + audio_len);
464 #else
465 skb = dev_alloc_skb(skb_res + buflen);
466 #endif
467 if (!skb) {
468 printk(KERN_WARNING
469 "isdn_tty: Out of memory in ttyI%d senddown\n",
470 info->line);
471 return;
472 }
473 skb_reserve(skb, skb_res);
474 memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
475 info->xmit_count = 0;
476 #ifdef CONFIG_ISDN_AUDIO
477 if (info->vonline & 2) {
478 /* For now, ifmt is fixed to 1 (alaw), since this
479 * is used with ISDN everywhere in the world, except
480 * US, Canada and Japan.
481 * Later, when US-ISDN protocols are implemented,
482 * this setting will depend on the D-channel protocol.
483 */
484 int ifmt = 1;
485
486 /* voice conversion/decompression */
487 switch (info->emu.vpar[3]) {
488 case 2:
489 case 3:
490 case 4:
491 /* adpcm, compatible to ZyXel 1496 modem
492 * with ROM revision 6.01
493 */
494 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
495 ifmt,
496 skb->data,
497 skb_put(skb, audio_len),
498 buflen);
499 skb_pull(skb, buflen);
500 skb_trim(skb, audio_len);
501 break;
502 case 5:
503 /* a-law */
504 if (!ifmt)
505 isdn_audio_alaw2ulaw(skb->data,
506 buflen);
507 break;
508 case 6:
509 /* u-law */
510 if (ifmt)
511 isdn_audio_ulaw2alaw(skb->data,
512 buflen);
513 break;
514 }
515 }
516 #endif /* CONFIG_ISDN_AUDIO */
517 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
518 /* Add T.70 simplified header */
519 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
520 memcpy(skb_push(skb, 2), "\1\0", 2);
521 else
522 memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
523 }
524 skb_queue_tail(&info->xmit_queue, skb);
525 }
526
527 /************************************************************
528 *
529 * Modem-functions
530 *
531 * mostly "stolen" from original Linux-serial.c and friends.
532 *
533 ************************************************************/
534
535 /* The next routine is called once from within timer-interrupt
536 * triggered within isdn_tty_modem_ncarrier(). It calls
537 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
538 * into the tty's buffer.
539 */
540 static void
541 isdn_tty_modem_do_ncarrier(unsigned long data)
542 {
543 modem_info *info = (modem_info *) data;
544 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
545 }
546
547 /* Next routine is called, whenever the DTR-signal is raised.
548 * It checks the ncarrier-flag, and triggers the above routine
549 * when necessary. The ncarrier-flag is set, whenever DTR goes
550 * low.
551 */
552 static void
553 isdn_tty_modem_ncarrier(modem_info *info)
554 {
555 if (info->ncarrier) {
556 info->nc_timer.expires = jiffies + HZ;
557 add_timer(&info->nc_timer);
558 }
559 }
560
561 /*
562 * return the usage calculated by si and layer 2 protocol
563 */
564 static int
565 isdn_calc_usage(int si, int l2)
566 {
567 int usg = ISDN_USAGE_MODEM;
568
569 #ifdef CONFIG_ISDN_AUDIO
570 if (si == 1) {
571 switch (l2) {
572 case ISDN_PROTO_L2_MODEM:
573 usg = ISDN_USAGE_MODEM;
574 break;
575 #ifdef CONFIG_ISDN_TTY_FAX
576 case ISDN_PROTO_L2_FAX:
577 usg = ISDN_USAGE_FAX;
578 break;
579 #endif
580 case ISDN_PROTO_L2_TRANS:
581 default:
582 usg = ISDN_USAGE_VOICE;
583 break;
584 }
585 }
586 #endif
587 return (usg);
588 }
589
590 /* isdn_tty_dial() performs dialing of a tty an the necessary
591 * setup of the lower levels before that.
592 */
593 static void
594 isdn_tty_dial(char *n, modem_info *info, atemu *m)
595 {
596 int usg = ISDN_USAGE_MODEM;
597 int si = 7;
598 int l2 = m->mdmreg[REG_L2PROT];
599 u_long flags;
600 isdn_ctrl cmd;
601 int i;
602 int j;
603
604 for (j = 7; j >= 0; j--)
605 if (m->mdmreg[REG_SI1] & (1 << j)) {
606 si = bit2si[j];
607 break;
608 }
609 usg = isdn_calc_usage(si, l2);
610 #ifdef CONFIG_ISDN_AUDIO
611 if ((si == 1) &&
612 (l2 != ISDN_PROTO_L2_MODEM)
613 #ifdef CONFIG_ISDN_TTY_FAX
614 && (l2 != ISDN_PROTO_L2_FAX)
615 #endif
616 ) {
617 l2 = ISDN_PROTO_L2_TRANS;
618 usg = ISDN_USAGE_VOICE;
619 }
620 #endif
621 m->mdmreg[REG_SI1I] = si2bit[si];
622 spin_lock_irqsave(&dev->lock, flags);
623 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
624 if (i < 0) {
625 spin_unlock_irqrestore(&dev->lock, flags);
626 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
627 } else {
628 info->isdn_driver = dev->drvmap[i];
629 info->isdn_channel = dev->chanmap[i];
630 info->drv_index = i;
631 dev->m_idx[i] = info->line;
632 dev->usage[i] |= ISDN_USAGE_OUTGOING;
633 info->last_dir = 1;
634 strcpy(info->last_num, n);
635 isdn_info_update();
636 spin_unlock_irqrestore(&dev->lock, flags);
637 cmd.driver = info->isdn_driver;
638 cmd.arg = info->isdn_channel;
639 cmd.command = ISDN_CMD_CLREAZ;
640 isdn_command(&cmd);
641 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
642 cmd.driver = info->isdn_driver;
643 cmd.command = ISDN_CMD_SETEAZ;
644 isdn_command(&cmd);
645 cmd.driver = info->isdn_driver;
646 cmd.command = ISDN_CMD_SETL2;
647 info->last_l2 = l2;
648 cmd.arg = info->isdn_channel + (l2 << 8);
649 isdn_command(&cmd);
650 cmd.driver = info->isdn_driver;
651 cmd.command = ISDN_CMD_SETL3;
652 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
653 #ifdef CONFIG_ISDN_TTY_FAX
654 if (l2 == ISDN_PROTO_L2_FAX) {
655 cmd.parm.fax = info->fax;
656 info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
657 }
658 #endif
659 isdn_command(&cmd);
660 cmd.driver = info->isdn_driver;
661 cmd.arg = info->isdn_channel;
662 sprintf(cmd.parm.setup.phone, "%s", n);
663 sprintf(cmd.parm.setup.eazmsn, "%s",
664 isdn_map_eaz2msn(m->msn, info->isdn_driver));
665 cmd.parm.setup.si1 = si;
666 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
667 cmd.command = ISDN_CMD_DIAL;
668 info->dialing = 1;
669 info->emu.carrierwait = 0;
670 strcpy(dev->num[i], n);
671 isdn_info_update();
672 isdn_command(&cmd);
673 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
674 }
675 }
676
677 /* isdn_tty_hangup() disassociates a tty from the real
678 * ISDN-line (hangup). The usage-status is cleared
679 * and some cleanup is done also.
680 */
681 void
682 isdn_tty_modem_hup(modem_info *info, int local)
683 {
684 isdn_ctrl cmd;
685 int di, ch;
686
687 if (!info)
688 return;
689
690 di = info->isdn_driver;
691 ch = info->isdn_channel;
692 if (di < 0 || ch < 0)
693 return;
694
695 info->isdn_driver = -1;
696 info->isdn_channel = -1;
697
698 #ifdef ISDN_DEBUG_MODEM_HUP
699 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
700 #endif
701 info->rcvsched = 0;
702 isdn_tty_flush_buffer(info->tty);
703 if (info->online) {
704 info->last_lhup = local;
705 info->online = 0;
706 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
707 }
708 #ifdef CONFIG_ISDN_AUDIO
709 info->vonline = 0;
710 #ifdef CONFIG_ISDN_TTY_FAX
711 info->faxonline = 0;
712 info->fax->phase = ISDN_FAX_PHASE_IDLE;
713 #endif
714 info->emu.vpar[4] = 0;
715 info->emu.vpar[5] = 8;
716 kfree(info->dtmf_state);
717 info->dtmf_state = NULL;
718 kfree(info->silence_state);
719 info->silence_state = NULL;
720 kfree(info->adpcms);
721 info->adpcms = NULL;
722 kfree(info->adpcmr);
723 info->adpcmr = NULL;
724 #endif
725 if ((info->msr & UART_MSR_RI) &&
726 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
727 isdn_tty_modem_result(RESULT_RUNG, info);
728 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
729 info->lsr |= UART_LSR_TEMT;
730
731 if (local) {
732 cmd.driver = di;
733 cmd.command = ISDN_CMD_HANGUP;
734 cmd.arg = ch;
735 isdn_command(&cmd);
736 }
737
738 isdn_all_eaz(di, ch);
739 info->emu.mdmreg[REG_RINGCNT] = 0;
740 isdn_free_channel(di, ch, 0);
741
742 if (info->drv_index >= 0) {
743 dev->m_idx[info->drv_index] = -1;
744 info->drv_index = -1;
745 }
746 }
747
748 /*
749 * Begin of a CAPI like interface, currently used only for
750 * supplementary service (CAPI 2.0 part III)
751 */
752 #include <linux/isdn/capicmd.h>
753 #include <linux/module.h>
754
755 int
756 isdn_tty_capi_facility(capi_msg *cm) {
757 return (-1); /* dummy */
758 }
759
760 /* isdn_tty_suspend() tries to suspend the current tty connection
761 */
762 static void
763 isdn_tty_suspend(char *id, modem_info *info, atemu *m)
764 {
765 isdn_ctrl cmd;
766
767 int l;
768
769 if (!info)
770 return;
771
772 #ifdef ISDN_DEBUG_MODEM_SERVICES
773 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
774 #endif
775 l = strlen(id);
776 if ((info->isdn_driver >= 0)) {
777 cmd.parm.cmsg.Length = l + 18;
778 cmd.parm.cmsg.Command = CAPI_FACILITY;
779 cmd.parm.cmsg.Subcommand = CAPI_REQ;
780 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
781 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
782 cmd.parm.cmsg.para[1] = 0;
783 cmd.parm.cmsg.para[2] = l + 3;
784 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
785 cmd.parm.cmsg.para[4] = 0;
786 cmd.parm.cmsg.para[5] = l;
787 strncpy(&cmd.parm.cmsg.para[6], id, l);
788 cmd.command = CAPI_PUT_MESSAGE;
789 cmd.driver = info->isdn_driver;
790 cmd.arg = info->isdn_channel;
791 isdn_command(&cmd);
792 }
793 }
794
795 /* isdn_tty_resume() tries to resume a suspended call
796 * setup of the lower levels before that. unfortunately here is no
797 * checking for compatibility of used protocols implemented by Q931
798 * It does the same things like isdn_tty_dial, the last command
799 * is different, may be we can merge it.
800 */
801
802 static void
803 isdn_tty_resume(char *id, modem_info *info, atemu *m)
804 {
805 int usg = ISDN_USAGE_MODEM;
806 int si = 7;
807 int l2 = m->mdmreg[REG_L2PROT];
808 isdn_ctrl cmd;
809 ulong flags;
810 int i;
811 int j;
812 int l;
813
814 l = strlen(id);
815 for (j = 7; j >= 0; j--)
816 if (m->mdmreg[REG_SI1] & (1 << j)) {
817 si = bit2si[j];
818 break;
819 }
820 usg = isdn_calc_usage(si, l2);
821 #ifdef CONFIG_ISDN_AUDIO
822 if ((si == 1) &&
823 (l2 != ISDN_PROTO_L2_MODEM)
824 #ifdef CONFIG_ISDN_TTY_FAX
825 && (l2 != ISDN_PROTO_L2_FAX)
826 #endif
827 ) {
828 l2 = ISDN_PROTO_L2_TRANS;
829 usg = ISDN_USAGE_VOICE;
830 }
831 #endif
832 m->mdmreg[REG_SI1I] = si2bit[si];
833 spin_lock_irqsave(&dev->lock, flags);
834 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
835 if (i < 0) {
836 spin_unlock_irqrestore(&dev->lock, flags);
837 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
838 } else {
839 info->isdn_driver = dev->drvmap[i];
840 info->isdn_channel = dev->chanmap[i];
841 info->drv_index = i;
842 dev->m_idx[i] = info->line;
843 dev->usage[i] |= ISDN_USAGE_OUTGOING;
844 info->last_dir = 1;
845 // strcpy(info->last_num, n);
846 isdn_info_update();
847 spin_unlock_irqrestore(&dev->lock, flags);
848 cmd.driver = info->isdn_driver;
849 cmd.arg = info->isdn_channel;
850 cmd.command = ISDN_CMD_CLREAZ;
851 isdn_command(&cmd);
852 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
853 cmd.driver = info->isdn_driver;
854 cmd.command = ISDN_CMD_SETEAZ;
855 isdn_command(&cmd);
856 cmd.driver = info->isdn_driver;
857 cmd.command = ISDN_CMD_SETL2;
858 info->last_l2 = l2;
859 cmd.arg = info->isdn_channel + (l2 << 8);
860 isdn_command(&cmd);
861 cmd.driver = info->isdn_driver;
862 cmd.command = ISDN_CMD_SETL3;
863 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
864 isdn_command(&cmd);
865 cmd.driver = info->isdn_driver;
866 cmd.arg = info->isdn_channel;
867 cmd.parm.cmsg.Length = l + 18;
868 cmd.parm.cmsg.Command = CAPI_FACILITY;
869 cmd.parm.cmsg.Subcommand = CAPI_REQ;
870 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
871 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
872 cmd.parm.cmsg.para[1] = 0;
873 cmd.parm.cmsg.para[2] = l + 3;
874 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
875 cmd.parm.cmsg.para[4] = 0;
876 cmd.parm.cmsg.para[5] = l;
877 strncpy(&cmd.parm.cmsg.para[6], id, l);
878 cmd.command = CAPI_PUT_MESSAGE;
879 info->dialing = 1;
880 // strcpy(dev->num[i], n);
881 isdn_info_update();
882 isdn_command(&cmd);
883 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
884 }
885 }
886
887 /* isdn_tty_send_msg() sends a message to a HL driver
888 * This is used for hybrid modem cards to send AT commands to it
889 */
890
891 static void
892 isdn_tty_send_msg(modem_info *info, atemu *m, char *msg)
893 {
894 int usg = ISDN_USAGE_MODEM;
895 int si = 7;
896 int l2 = m->mdmreg[REG_L2PROT];
897 isdn_ctrl cmd;
898 ulong flags;
899 int i;
900 int j;
901 int l;
902
903 l = strlen(msg);
904 if (!l) {
905 isdn_tty_modem_result(RESULT_ERROR, info);
906 return;
907 }
908 for (j = 7; j >= 0; j--)
909 if (m->mdmreg[REG_SI1] & (1 << j)) {
910 si = bit2si[j];
911 break;
912 }
913 usg = isdn_calc_usage(si, l2);
914 #ifdef CONFIG_ISDN_AUDIO
915 if ((si == 1) &&
916 (l2 != ISDN_PROTO_L2_MODEM)
917 #ifdef CONFIG_ISDN_TTY_FAX
918 && (l2 != ISDN_PROTO_L2_FAX)
919 #endif
920 ) {
921 l2 = ISDN_PROTO_L2_TRANS;
922 usg = ISDN_USAGE_VOICE;
923 }
924 #endif
925 m->mdmreg[REG_SI1I] = si2bit[si];
926 spin_lock_irqsave(&dev->lock, flags);
927 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
928 if (i < 0) {
929 spin_unlock_irqrestore(&dev->lock, flags);
930 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
931 } else {
932 info->isdn_driver = dev->drvmap[i];
933 info->isdn_channel = dev->chanmap[i];
934 info->drv_index = i;
935 dev->m_idx[i] = info->line;
936 dev->usage[i] |= ISDN_USAGE_OUTGOING;
937 info->last_dir = 1;
938 isdn_info_update();
939 spin_unlock_irqrestore(&dev->lock, flags);
940 cmd.driver = info->isdn_driver;
941 cmd.arg = info->isdn_channel;
942 cmd.command = ISDN_CMD_CLREAZ;
943 isdn_command(&cmd);
944 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
945 cmd.driver = info->isdn_driver;
946 cmd.command = ISDN_CMD_SETEAZ;
947 isdn_command(&cmd);
948 cmd.driver = info->isdn_driver;
949 cmd.command = ISDN_CMD_SETL2;
950 info->last_l2 = l2;
951 cmd.arg = info->isdn_channel + (l2 << 8);
952 isdn_command(&cmd);
953 cmd.driver = info->isdn_driver;
954 cmd.command = ISDN_CMD_SETL3;
955 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
956 isdn_command(&cmd);
957 cmd.driver = info->isdn_driver;
958 cmd.arg = info->isdn_channel;
959 cmd.parm.cmsg.Length = l + 14;
960 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
961 cmd.parm.cmsg.Subcommand = CAPI_REQ;
962 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
963 cmd.parm.cmsg.para[0] = l + 1;
964 strncpy(&cmd.parm.cmsg.para[1], msg, l);
965 cmd.parm.cmsg.para[l + 1] = 0xd;
966 cmd.command = CAPI_PUT_MESSAGE;
967 /* info->dialing = 1;
968 strcpy(dev->num[i], n);
969 isdn_info_update();
970 */
971 isdn_command(&cmd);
972 }
973 }
974
975 static inline int
976 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
977 {
978 #ifdef MODEM_PARANOIA_CHECK
979 if (!info) {
980 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
981 name, routine);
982 return 1;
983 }
984 if (info->magic != ISDN_ASYNC_MAGIC) {
985 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
986 name, routine);
987 return 1;
988 }
989 #endif
990 return 0;
991 }
992
993 /*
994 * This routine is called to set the UART divisor registers to match
995 * the specified baud rate for a serial port.
996 */
997 static void
998 isdn_tty_change_speed(modem_info *info)
999 {
1000 uint cflag,
1001 cval,
1002 quot;
1003 int i;
1004
1005 if (!info->tty || !info->tty->termios)
1006 return;
1007 cflag = info->tty->termios->c_cflag;
1008
1009 quot = i = cflag & CBAUD;
1010 if (i & CBAUDEX) {
1011 i &= ~CBAUDEX;
1012 if (i < 1 || i > 2)
1013 info->tty->termios->c_cflag &= ~CBAUDEX;
1014 else
1015 i += 15;
1016 }
1017 if (quot) {
1018 info->mcr |= UART_MCR_DTR;
1019 isdn_tty_modem_ncarrier(info);
1020 } else {
1021 info->mcr &= ~UART_MCR_DTR;
1022 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1023 #ifdef ISDN_DEBUG_MODEM_HUP
1024 printk(KERN_DEBUG "Mhup in changespeed\n");
1025 #endif
1026 if (info->online)
1027 info->ncarrier = 1;
1028 isdn_tty_modem_reset_regs(info, 0);
1029 isdn_tty_modem_hup(info, 1);
1030 }
1031 return;
1032 }
1033 /* byte size and parity */
1034 cval = cflag & (CSIZE | CSTOPB);
1035 cval >>= 4;
1036 if (cflag & PARENB)
1037 cval |= UART_LCR_PARITY;
1038 if (!(cflag & PARODD))
1039 cval |= UART_LCR_EPAR;
1040
1041 /* CTS flow control flag and modem status interrupts */
1042 if (cflag & CRTSCTS) {
1043 info->flags |= ISDN_ASYNC_CTS_FLOW;
1044 } else
1045 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1046 if (cflag & CLOCAL)
1047 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1048 else {
1049 info->flags |= ISDN_ASYNC_CHECK_CD;
1050 }
1051 }
1052
1053 static int
1054 isdn_tty_startup(modem_info *info)
1055 {
1056 if (info->flags & ISDN_ASYNC_INITIALIZED)
1057 return 0;
1058 isdn_lock_drivers();
1059 #ifdef ISDN_DEBUG_MODEM_OPEN
1060 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1061 #endif
1062 /*
1063 * Now, initialize the UART
1064 */
1065 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1066 if (info->tty)
1067 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1068 /*
1069 * and set the speed of the serial port
1070 */
1071 isdn_tty_change_speed(info);
1072
1073 info->flags |= ISDN_ASYNC_INITIALIZED;
1074 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1075 info->send_outstanding = 0;
1076 return 0;
1077 }
1078
1079 /*
1080 * This routine will shutdown a serial port; interrupts are disabled, and
1081 * DTR is dropped if the hangup on close termio flag is on.
1082 */
1083 static void
1084 isdn_tty_shutdown(modem_info *info)
1085 {
1086 if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1087 return;
1088 #ifdef ISDN_DEBUG_MODEM_OPEN
1089 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1090 #endif
1091 isdn_unlock_drivers();
1092 info->msr &= ~UART_MSR_RI;
1093 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1094 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1095 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1096 isdn_tty_modem_reset_regs(info, 0);
1097 #ifdef ISDN_DEBUG_MODEM_HUP
1098 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1099 #endif
1100 isdn_tty_modem_hup(info, 1);
1101 }
1102 }
1103 if (info->tty)
1104 set_bit(TTY_IO_ERROR, &info->tty->flags);
1105
1106 info->flags &= ~ISDN_ASYNC_INITIALIZED;
1107 }
1108
1109 /* isdn_tty_write() is the main send-routine. It is called from the upper
1110 * levels within the kernel to perform sending data. Depending on the
1111 * online-flag it either directs output to the at-command-interpreter or
1112 * to the lower level. Additional tasks done here:
1113 * - If online, check for escape-sequence (+++)
1114 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1115 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1116 * - If dialing, abort dial.
1117 */
1118 static int
1119 isdn_tty_write(struct tty_struct *tty, const u_char *buf, int count)
1120 {
1121 int c;
1122 int total = 0;
1123 modem_info *info = (modem_info *) tty->driver_data;
1124 atemu *m = &info->emu;
1125
1126 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1127 return 0;
1128 /* See isdn_tty_senddown() */
1129 atomic_inc(&info->xmit_lock);
1130 while (1) {
1131 c = count;
1132 if (c > info->xmit_size - info->xmit_count)
1133 c = info->xmit_size - info->xmit_count;
1134 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1135 c = dev->drv[info->isdn_driver]->maxbufsize;
1136 if (c <= 0)
1137 break;
1138 if ((info->online > 1)
1139 #ifdef CONFIG_ISDN_AUDIO
1140 || (info->vonline & 3)
1141 #endif
1142 ) {
1143 #ifdef CONFIG_ISDN_AUDIO
1144 if (!info->vonline)
1145 #endif
1146 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1147 &(m->pluscount),
1148 &(m->lastplus));
1149 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1150 #ifdef CONFIG_ISDN_AUDIO
1151 if (info->vonline) {
1152 int cc = isdn_tty_handleDLEdown(info, m, c);
1153 if (info->vonline & 2) {
1154 if (!cc) {
1155 /* If DLE decoding results in zero-transmit, but
1156 * c originally was non-zero, do a wakeup.
1157 */
1158 tty_wakeup(tty);
1159 info->msr |= UART_MSR_CTS;
1160 info->lsr |= UART_LSR_TEMT;
1161 }
1162 info->xmit_count += cc;
1163 }
1164 if ((info->vonline & 3) == 1) {
1165 /* Do NOT handle Ctrl-Q or Ctrl-S
1166 * when in full-duplex audio mode.
1167 */
1168 if (isdn_tty_end_vrx(buf, c)) {
1169 info->vonline &= ~1;
1170 #ifdef ISDN_DEBUG_MODEM_VOICE
1171 printk(KERN_DEBUG
1172 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1173 info->line);
1174 #endif
1175 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1176 }
1177 }
1178 } else
1179 if (TTY_IS_FCLASS1(info)) {
1180 int cc = isdn_tty_handleDLEdown(info, m, c);
1181
1182 if (info->vonline & 4) { /* ETX seen */
1183 isdn_ctrl c;
1184
1185 c.command = ISDN_CMD_FAXCMD;
1186 c.driver = info->isdn_driver;
1187 c.arg = info->isdn_channel;
1188 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1189 c.parm.aux.subcmd = ETX;
1190 isdn_command(&c);
1191 }
1192 info->vonline = 0;
1193 #ifdef ISDN_DEBUG_MODEM_VOICE
1194 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1195 #endif
1196 info->xmit_count += cc;
1197 } else
1198 #endif
1199 info->xmit_count += c;
1200 } else {
1201 info->msr |= UART_MSR_CTS;
1202 info->lsr |= UART_LSR_TEMT;
1203 if (info->dialing) {
1204 info->dialing = 0;
1205 #ifdef ISDN_DEBUG_MODEM_HUP
1206 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1207 #endif
1208 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1209 isdn_tty_modem_hup(info, 1);
1210 } else
1211 c = isdn_tty_edit_at(buf, c, info);
1212 }
1213 buf += c;
1214 count -= c;
1215 total += c;
1216 }
1217 atomic_dec(&info->xmit_lock);
1218 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1219 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1220 isdn_tty_senddown(info);
1221 isdn_tty_tint(info);
1222 }
1223 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1224 }
1225 return total;
1226 }
1227
1228 static int
1229 isdn_tty_write_room(struct tty_struct *tty)
1230 {
1231 modem_info *info = (modem_info *) tty->driver_data;
1232 int ret;
1233
1234 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1235 return 0;
1236 if (!info->online)
1237 return info->xmit_size;
1238 ret = info->xmit_size - info->xmit_count;
1239 return (ret < 0) ? 0 : ret;
1240 }
1241
1242 static int
1243 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1244 {
1245 modem_info *info = (modem_info *) tty->driver_data;
1246
1247 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1248 return 0;
1249 if (!info->online)
1250 return 0;
1251 return (info->xmit_count);
1252 }
1253
1254 static void
1255 isdn_tty_flush_buffer(struct tty_struct *tty)
1256 {
1257 modem_info *info;
1258
1259 if (!tty) {
1260 return;
1261 }
1262 info = (modem_info *) tty->driver_data;
1263 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1264 return;
1265 }
1266 isdn_tty_cleanup_xmit(info);
1267 info->xmit_count = 0;
1268 tty_wakeup(tty);
1269 }
1270
1271 static void
1272 isdn_tty_flush_chars(struct tty_struct *tty)
1273 {
1274 modem_info *info = (modem_info *) tty->driver_data;
1275
1276 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1277 return;
1278 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1279 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1280 }
1281
1282 /*
1283 * ------------------------------------------------------------
1284 * isdn_tty_throttle()
1285 *
1286 * This routine is called by the upper-layer tty layer to signal that
1287 * incoming characters should be throttled.
1288 * ------------------------------------------------------------
1289 */
1290 static void
1291 isdn_tty_throttle(struct tty_struct *tty)
1292 {
1293 modem_info *info = (modem_info *) tty->driver_data;
1294
1295 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1296 return;
1297 if (I_IXOFF(tty))
1298 info->x_char = STOP_CHAR(tty);
1299 info->mcr &= ~UART_MCR_RTS;
1300 }
1301
1302 static void
1303 isdn_tty_unthrottle(struct tty_struct *tty)
1304 {
1305 modem_info *info = (modem_info *) tty->driver_data;
1306
1307 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1308 return;
1309 if (I_IXOFF(tty)) {
1310 if (info->x_char)
1311 info->x_char = 0;
1312 else
1313 info->x_char = START_CHAR(tty);
1314 }
1315 info->mcr |= UART_MCR_RTS;
1316 }
1317
1318 /*
1319 * ------------------------------------------------------------
1320 * isdn_tty_ioctl() and friends
1321 * ------------------------------------------------------------
1322 */
1323
1324 /*
1325 * isdn_tty_get_lsr_info - get line status register info
1326 *
1327 * Purpose: Let user call ioctl() to get info when the UART physically
1328 * is emptied. On bus types like RS485, the transmitter must
1329 * release the bus after transmitting. This must be done when
1330 * the transmit shift register is empty, not be done when the
1331 * transmit holding register is empty. This functionality
1332 * allows RS485 driver to be written in user space.
1333 */
1334 static int
1335 isdn_tty_get_lsr_info(modem_info *info, uint __user *value)
1336 {
1337 u_char status;
1338 uint result;
1339
1340 status = info->lsr;
1341 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1342 return put_user(result, value);
1343 }
1344
1345
1346 static int
1347 isdn_tty_tiocmget(struct tty_struct *tty)
1348 {
1349 modem_info *info = (modem_info *) tty->driver_data;
1350 u_char control, status;
1351
1352 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1353 return -ENODEV;
1354 if (tty->flags & (1 << TTY_IO_ERROR))
1355 return -EIO;
1356
1357 mutex_lock(&modem_info_mutex);
1358 #ifdef ISDN_DEBUG_MODEM_IOCTL
1359 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1360 #endif
1361
1362 control = info->mcr;
1363 status = info->msr;
1364 mutex_unlock(&modem_info_mutex);
1365 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1366 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1367 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1368 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1369 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1370 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1371 }
1372
1373 static int
1374 isdn_tty_tiocmset(struct tty_struct *tty,
1375 unsigned int set, unsigned int clear)
1376 {
1377 modem_info *info = (modem_info *) tty->driver_data;
1378
1379 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1380 return -ENODEV;
1381 if (tty->flags & (1 << TTY_IO_ERROR))
1382 return -EIO;
1383
1384 #ifdef ISDN_DEBUG_MODEM_IOCTL
1385 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1386 #endif
1387
1388 mutex_lock(&modem_info_mutex);
1389 if (set & TIOCM_RTS)
1390 info->mcr |= UART_MCR_RTS;
1391 if (set & TIOCM_DTR) {
1392 info->mcr |= UART_MCR_DTR;
1393 isdn_tty_modem_ncarrier(info);
1394 }
1395
1396 if (clear & TIOCM_RTS)
1397 info->mcr &= ~UART_MCR_RTS;
1398 if (clear & TIOCM_DTR) {
1399 info->mcr &= ~UART_MCR_DTR;
1400 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1401 isdn_tty_modem_reset_regs(info, 0);
1402 #ifdef ISDN_DEBUG_MODEM_HUP
1403 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1404 #endif
1405 if (info->online)
1406 info->ncarrier = 1;
1407 isdn_tty_modem_hup(info, 1);
1408 }
1409 }
1410 mutex_unlock(&modem_info_mutex);
1411 return 0;
1412 }
1413
1414 static int
1415 isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg)
1416 {
1417 modem_info *info = (modem_info *) tty->driver_data;
1418 int retval;
1419
1420 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1421 return -ENODEV;
1422 if (tty->flags & (1 << TTY_IO_ERROR))
1423 return -EIO;
1424 switch (cmd) {
1425 case TCSBRK: /* SVID version: non-zero arg --> no break */
1426 #ifdef ISDN_DEBUG_MODEM_IOCTL
1427 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1428 #endif
1429 retval = tty_check_change(tty);
1430 if (retval)
1431 return retval;
1432 tty_wait_until_sent(tty, 0);
1433 return 0;
1434 case TCSBRKP: /* support for POSIX tcsendbreak() */
1435 #ifdef ISDN_DEBUG_MODEM_IOCTL
1436 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1437 #endif
1438 retval = tty_check_change(tty);
1439 if (retval)
1440 return retval;
1441 tty_wait_until_sent(tty, 0);
1442 return 0;
1443 case TIOCSERGETLSR: /* Get line status register */
1444 #ifdef ISDN_DEBUG_MODEM_IOCTL
1445 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1446 #endif
1447 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1448 default:
1449 #ifdef ISDN_DEBUG_MODEM_IOCTL
1450 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1451 #endif
1452 return -ENOIOCTLCMD;
1453 }
1454 return 0;
1455 }
1456
1457 static void
1458 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1459 {
1460 modem_info *info = (modem_info *) tty->driver_data;
1461
1462 if (!old_termios)
1463 isdn_tty_change_speed(info);
1464 else {
1465 if (tty->termios->c_cflag == old_termios->c_cflag &&
1466 tty->termios->c_ispeed == old_termios->c_ispeed &&
1467 tty->termios->c_ospeed == old_termios->c_ospeed)
1468 return;
1469 isdn_tty_change_speed(info);
1470 if ((old_termios->c_cflag & CRTSCTS) &&
1471 !(tty->termios->c_cflag & CRTSCTS))
1472 tty->hw_stopped = 0;
1473 }
1474 }
1475
1476 /*
1477 * ------------------------------------------------------------
1478 * isdn_tty_open() and friends
1479 * ------------------------------------------------------------
1480 */
1481 static int
1482 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info *info)
1483 {
1484 DECLARE_WAITQUEUE(wait, NULL);
1485 int do_clocal = 0;
1486 int retval;
1487
1488 /*
1489 * If the device is in the middle of being closed, then block
1490 * until it's done, and then try again.
1491 */
1492 if (tty_hung_up_p(filp) ||
1493 (info->flags & ISDN_ASYNC_CLOSING)) {
1494 if (info->flags & ISDN_ASYNC_CLOSING)
1495 interruptible_sleep_on(&info->close_wait);
1496 #ifdef MODEM_DO_RESTART
1497 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1498 return -EAGAIN;
1499 else
1500 return -ERESTARTSYS;
1501 #else
1502 return -EAGAIN;
1503 #endif
1504 }
1505 /*
1506 * If non-blocking mode is set, then make the check up front
1507 * and then exit.
1508 */
1509 if ((filp->f_flags & O_NONBLOCK) ||
1510 (tty->flags & (1 << TTY_IO_ERROR))) {
1511 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1512 return -EBUSY;
1513 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1514 return 0;
1515 }
1516 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1517 if (info->normal_termios.c_cflag & CLOCAL)
1518 do_clocal = 1;
1519 } else {
1520 if (tty->termios->c_cflag & CLOCAL)
1521 do_clocal = 1;
1522 }
1523 /*
1524 * Block waiting for the carrier detect and the line to become
1525 * free (i.e., not in use by the callout). While we are in
1526 * this loop, info->count is dropped by one, so that
1527 * isdn_tty_close() knows when to free things. We restore it upon
1528 * exit, either normal or abnormal.
1529 */
1530 retval = 0;
1531 add_wait_queue(&info->open_wait, &wait);
1532 #ifdef ISDN_DEBUG_MODEM_OPEN
1533 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1534 info->line, info->count);
1535 #endif
1536 if (!(tty_hung_up_p(filp)))
1537 info->count--;
1538 info->blocked_open++;
1539 while (1) {
1540 set_current_state(TASK_INTERRUPTIBLE);
1541 if (tty_hung_up_p(filp) ||
1542 !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1543 #ifdef MODEM_DO_RESTART
1544 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1545 retval = -EAGAIN;
1546 else
1547 retval = -ERESTARTSYS;
1548 #else
1549 retval = -EAGAIN;
1550 #endif
1551 break;
1552 }
1553 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1554 !(info->flags & ISDN_ASYNC_CLOSING) &&
1555 (do_clocal || (info->msr & UART_MSR_DCD))) {
1556 break;
1557 }
1558 if (signal_pending(current)) {
1559 retval = -ERESTARTSYS;
1560 break;
1561 }
1562 #ifdef ISDN_DEBUG_MODEM_OPEN
1563 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1564 info->line, info->count);
1565 #endif
1566 schedule();
1567 }
1568 current->state = TASK_RUNNING;
1569 remove_wait_queue(&info->open_wait, &wait);
1570 if (!tty_hung_up_p(filp))
1571 info->count++;
1572 info->blocked_open--;
1573 #ifdef ISDN_DEBUG_MODEM_OPEN
1574 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1575 info->line, info->count);
1576 #endif
1577 if (retval)
1578 return retval;
1579 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1580 return 0;
1581 }
1582
1583 /*
1584 * This routine is called whenever a serial port is opened. It
1585 * enables interrupts for a serial port, linking in its async structure into
1586 * the IRQ chain. It also performs the serial-specific
1587 * initialization for the tty structure.
1588 */
1589 static int
1590 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1591 {
1592 modem_info *info;
1593 int retval;
1594
1595 info = &dev->mdm.info[tty->index];
1596 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1597 return -ENODEV;
1598 if (!try_module_get(info->owner)) {
1599 printk(KERN_WARNING "%s: cannot reserve module\n", __func__);
1600 return -ENODEV;
1601 }
1602 #ifdef ISDN_DEBUG_MODEM_OPEN
1603 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1604 info->count);
1605 #endif
1606 info->count++;
1607 tty->driver_data = info;
1608 info->tty = tty;
1609 /*
1610 * Start up serial port
1611 */
1612 retval = isdn_tty_startup(info);
1613 if (retval) {
1614 #ifdef ISDN_DEBUG_MODEM_OPEN
1615 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1616 #endif
1617 module_put(info->owner);
1618 return retval;
1619 }
1620 retval = isdn_tty_block_til_ready(tty, filp, info);
1621 if (retval) {
1622 #ifdef ISDN_DEBUG_MODEM_OPEN
1623 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1624 #endif
1625 module_put(info->owner);
1626 return retval;
1627 }
1628 #ifdef ISDN_DEBUG_MODEM_OPEN
1629 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1630 #endif
1631 dev->modempoll++;
1632 #ifdef ISDN_DEBUG_MODEM_OPEN
1633 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1634 #endif
1635 return 0;
1636 }
1637
1638 static void
1639 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1640 {
1641 modem_info *info = (modem_info *) tty->driver_data;
1642 ulong timeout;
1643
1644 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1645 return;
1646 if (tty_hung_up_p(filp)) {
1647 #ifdef ISDN_DEBUG_MODEM_OPEN
1648 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1649 #endif
1650 return;
1651 }
1652 if ((tty->count == 1) && (info->count != 1)) {
1653 /*
1654 * Uh, oh. tty->count is 1, which means that the tty
1655 * structure will be freed. Info->count should always
1656 * be one in these conditions. If it's greater than
1657 * one, we've got real problems, since it means the
1658 * serial port won't be shutdown.
1659 */
1660 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1661 "info->count is %d\n", info->count);
1662 info->count = 1;
1663 }
1664 if (--info->count < 0) {
1665 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1666 info->line, info->count);
1667 info->count = 0;
1668 }
1669 if (info->count) {
1670 #ifdef ISDN_DEBUG_MODEM_OPEN
1671 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1672 #endif
1673 module_put(info->owner);
1674 return;
1675 }
1676 info->flags |= ISDN_ASYNC_CLOSING;
1677 /*
1678 * Save the termios structure, since this port may have
1679 * separate termios for callout and dialin.
1680 */
1681 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1682 info->normal_termios = *tty->termios;
1683 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1684 info->callout_termios = *tty->termios;
1685
1686 tty->closing = 1;
1687 /*
1688 * At this point we stop accepting input. To do this, we
1689 * disable the receive line status interrupts, and tell the
1690 * interrupt driver to stop checking the data ready bit in the
1691 * line status register.
1692 */
1693 if (info->flags & ISDN_ASYNC_INITIALIZED) {
1694 tty_wait_until_sent_from_close(tty, 3000); /* 30 seconds timeout */
1695 /*
1696 * Before we drop DTR, make sure the UART transmitter
1697 * has completely drained; this is especially
1698 * important if there is a transmit FIFO!
1699 */
1700 timeout = jiffies + HZ;
1701 while (!(info->lsr & UART_LSR_TEMT)) {
1702 schedule_timeout_interruptible(20);
1703 if (time_after(jiffies, timeout))
1704 break;
1705 }
1706 }
1707 dev->modempoll--;
1708 isdn_tty_shutdown(info);
1709 isdn_tty_flush_buffer(tty);
1710 tty_ldisc_flush(tty);
1711 info->tty = NULL;
1712 info->ncarrier = 0;
1713 tty->closing = 0;
1714 module_put(info->owner);
1715 if (info->blocked_open) {
1716 msleep_interruptible(500);
1717 wake_up_interruptible(&info->open_wait);
1718 }
1719 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1720 wake_up_interruptible(&info->close_wait);
1721 #ifdef ISDN_DEBUG_MODEM_OPEN
1722 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1723 #endif
1724 }
1725
1726 /*
1727 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1728 */
1729 static void
1730 isdn_tty_hangup(struct tty_struct *tty)
1731 {
1732 modem_info *info = (modem_info *) tty->driver_data;
1733
1734 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1735 return;
1736 isdn_tty_shutdown(info);
1737 info->count = 0;
1738 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1739 info->tty = NULL;
1740 wake_up_interruptible(&info->open_wait);
1741 }
1742
1743 /* This routine initializes all emulator-data.
1744 */
1745 static void
1746 isdn_tty_reset_profile(atemu *m)
1747 {
1748 m->profile[0] = 0;
1749 m->profile[1] = 0;
1750 m->profile[2] = 43;
1751 m->profile[3] = 13;
1752 m->profile[4] = 10;
1753 m->profile[5] = 8;
1754 m->profile[6] = 3;
1755 m->profile[7] = 60;
1756 m->profile[8] = 2;
1757 m->profile[9] = 6;
1758 m->profile[10] = 7;
1759 m->profile[11] = 70;
1760 m->profile[12] = 0x45;
1761 m->profile[13] = 4;
1762 m->profile[14] = ISDN_PROTO_L2_X75I;
1763 m->profile[15] = ISDN_PROTO_L3_TRANS;
1764 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1765 m->profile[17] = ISDN_MODEM_WINSIZE;
1766 m->profile[18] = 4;
1767 m->profile[19] = 0;
1768 m->profile[20] = 0;
1769 m->profile[23] = 0;
1770 m->pmsn[0] = '\0';
1771 m->plmsn[0] = '\0';
1772 }
1773
1774 #ifdef CONFIG_ISDN_AUDIO
1775 static void
1776 isdn_tty_modem_reset_vpar(atemu *m)
1777 {
1778 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1779 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1780 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1781 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1782 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1783 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1784 }
1785 #endif
1786
1787 #ifdef CONFIG_ISDN_TTY_FAX
1788 static void
1789 isdn_tty_modem_reset_faxpar(modem_info *info)
1790 {
1791 T30_s *f = info->fax;
1792
1793 f->code = 0;
1794 f->phase = ISDN_FAX_PHASE_IDLE;
1795 f->direction = 0;
1796 f->resolution = 1; /* fine */
1797 f->rate = 5; /* 14400 bit/s */
1798 f->width = 0;
1799 f->length = 0;
1800 f->compression = 0;
1801 f->ecm = 0;
1802 f->binary = 0;
1803 f->scantime = 0;
1804 memset(&f->id[0], 32, FAXIDLEN - 1);
1805 f->id[FAXIDLEN - 1] = 0;
1806 f->badlin = 0;
1807 f->badmul = 0;
1808 f->bor = 0;
1809 f->nbc = 0;
1810 f->cq = 0;
1811 f->cr = 0;
1812 f->ctcrty = 0;
1813 f->minsp = 0;
1814 f->phcto = 30;
1815 f->rel = 0;
1816 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1817 f->pollid[FAXIDLEN - 1] = 0;
1818 }
1819 #endif
1820
1821 static void
1822 isdn_tty_modem_reset_regs(modem_info *info, int force)
1823 {
1824 atemu *m = &info->emu;
1825 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1826 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1827 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1828 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1829 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1830 }
1831 #ifdef CONFIG_ISDN_AUDIO
1832 isdn_tty_modem_reset_vpar(m);
1833 #endif
1834 #ifdef CONFIG_ISDN_TTY_FAX
1835 isdn_tty_modem_reset_faxpar(info);
1836 #endif
1837 m->mdmcmdl = 0;
1838 }
1839
1840 static void
1841 modem_write_profile(atemu *m)
1842 {
1843 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1844 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1845 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1846 if (dev->profd)
1847 send_sig(SIGIO, dev->profd, 1);
1848 }
1849
1850 static const struct tty_operations modem_ops = {
1851 .open = isdn_tty_open,
1852 .close = isdn_tty_close,
1853 .write = isdn_tty_write,
1854 .flush_chars = isdn_tty_flush_chars,
1855 .write_room = isdn_tty_write_room,
1856 .chars_in_buffer = isdn_tty_chars_in_buffer,
1857 .flush_buffer = isdn_tty_flush_buffer,
1858 .ioctl = isdn_tty_ioctl,
1859 .throttle = isdn_tty_throttle,
1860 .unthrottle = isdn_tty_unthrottle,
1861 .set_termios = isdn_tty_set_termios,
1862 .hangup = isdn_tty_hangup,
1863 .tiocmget = isdn_tty_tiocmget,
1864 .tiocmset = isdn_tty_tiocmset,
1865 };
1866
1867 int
1868 isdn_tty_modem_init(void)
1869 {
1870 isdn_modem_t *m;
1871 int i, retval;
1872 modem_info *info;
1873
1874 m = &dev->mdm;
1875 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1876 if (!m->tty_modem)
1877 return -ENOMEM;
1878 m->tty_modem->name = "ttyI";
1879 m->tty_modem->major = ISDN_TTY_MAJOR;
1880 m->tty_modem->minor_start = 0;
1881 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1882 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1883 m->tty_modem->init_termios = tty_std_termios;
1884 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1885 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1886 m->tty_modem->driver_name = "isdn_tty";
1887 tty_set_operations(m->tty_modem, &modem_ops);
1888 retval = tty_register_driver(m->tty_modem);
1889 if (retval) {
1890 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1891 goto err;
1892 }
1893 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1894 info = &m->info[i];
1895 #ifdef CONFIG_ISDN_TTY_FAX
1896 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1897 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1898 retval = -ENOMEM;
1899 goto err_unregister;
1900 }
1901 #endif
1902 #ifdef MODULE
1903 info->owner = THIS_MODULE;
1904 #endif
1905 spin_lock_init(&info->readlock);
1906 sprintf(info->last_cause, "0000");
1907 sprintf(info->last_num, "none");
1908 info->last_dir = 0;
1909 info->last_lhup = 1;
1910 info->last_l2 = -1;
1911 info->last_si = 0;
1912 isdn_tty_reset_profile(&info->emu);
1913 isdn_tty_modem_reset_regs(info, 1);
1914 info->magic = ISDN_ASYNC_MAGIC;
1915 info->line = i;
1916 info->tty = NULL;
1917 info->x_char = 0;
1918 info->count = 0;
1919 info->blocked_open = 0;
1920 init_waitqueue_head(&info->open_wait);
1921 init_waitqueue_head(&info->close_wait);
1922 info->isdn_driver = -1;
1923 info->isdn_channel = -1;
1924 info->drv_index = -1;
1925 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1926 init_timer(&info->nc_timer);
1927 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1928 info->nc_timer.data = (unsigned long) info;
1929 skb_queue_head_init(&info->xmit_queue);
1930 #ifdef CONFIG_ISDN_AUDIO
1931 skb_queue_head_init(&info->dtmf_queue);
1932 #endif
1933 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1934 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1935 retval = -ENOMEM;
1936 goto err_unregister;
1937 }
1938 /* Make room for T.70 header */
1939 info->xmit_buf += 4;
1940 }
1941 return 0;
1942 err_unregister:
1943 for (i--; i >= 0; i--) {
1944 info = &m->info[i];
1945 #ifdef CONFIG_ISDN_TTY_FAX
1946 kfree(info->fax);
1947 #endif
1948 kfree(info->xmit_buf - 4);
1949 }
1950 tty_unregister_driver(m->tty_modem);
1951 err:
1952 put_tty_driver(m->tty_modem);
1953 m->tty_modem = NULL;
1954 return retval;
1955 }
1956
1957 void
1958 isdn_tty_exit(void)
1959 {
1960 modem_info *info;
1961 int i;
1962
1963 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1964 info = &dev->mdm.info[i];
1965 isdn_tty_cleanup_xmit(info);
1966 #ifdef CONFIG_ISDN_TTY_FAX
1967 kfree(info->fax);
1968 #endif
1969 kfree(info->xmit_buf - 4);
1970 }
1971 tty_unregister_driver(dev->mdm.tty_modem);
1972 put_tty_driver(dev->mdm.tty_modem);
1973 dev->mdm.tty_modem = NULL;
1974 }
1975
1976
1977 /*
1978 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1979 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1980 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1981 */
1982
1983 static int
1984 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1985 {
1986 #ifdef ISDN_DEBUG_MODEM_ICALL
1987 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1988 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1989 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1990 #endif
1991 if (strlen(emu->lmsn)) {
1992 char *p = emu->lmsn;
1993 char *q;
1994 int tmp;
1995 int ret = 0;
1996
1997 while (1) {
1998 if ((q = strchr(p, ';')))
1999 *q = '\0';
2000 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2001 ret = tmp;
2002 #ifdef ISDN_DEBUG_MODEM_ICALL
2003 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2004 p, isdn_map_eaz2msn(emu->msn, di), tmp);
2005 #endif
2006 if (q) {
2007 *q = ';';
2008 p = q;
2009 p++;
2010 }
2011 if (!tmp)
2012 return 0;
2013 if (!q)
2014 break;
2015 }
2016 return ret;
2017 } else {
2018 int tmp;
2019 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2020 #ifdef ISDN_DEBUG_MODEM_ICALL
2021 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2022 isdn_map_eaz2msn(emu->msn, di), tmp);
2023 #endif
2024 return tmp;
2025 }
2026 }
2027
2028 /*
2029 * An incoming call-request has arrived.
2030 * Search the tty-devices for an appropriate device and bind
2031 * it to the ISDN-Channel.
2032 * Return:
2033 *
2034 * 0 = No matching device found.
2035 * 1 = A matching device found.
2036 * 3 = No match found, but eventually would match, if
2037 * CID is longer.
2038 */
2039 int
2040 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2041 {
2042 char *eaz;
2043 int i;
2044 int wret;
2045 int idx;
2046 int si1;
2047 int si2;
2048 char *nr;
2049 ulong flags;
2050
2051 if (!setup->phone[0]) {
2052 nr = "0";
2053 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2054 } else
2055 nr = setup->phone;
2056 si1 = (int) setup->si1;
2057 si2 = (int) setup->si2;
2058 if (!setup->eazmsn[0]) {
2059 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2060 eaz = "0";
2061 } else
2062 eaz = setup->eazmsn;
2063 #ifdef ISDN_DEBUG_MODEM_ICALL
2064 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2065 #endif
2066 wret = 0;
2067 spin_lock_irqsave(&dev->lock, flags);
2068 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2069 modem_info *info = &dev->mdm.info[i];
2070
2071 if (info->count == 0)
2072 continue;
2073 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
2074 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
2075 idx = isdn_dc2minor(di, ch);
2076 #ifdef ISDN_DEBUG_MODEM_ICALL
2077 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2078 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2079 info->flags, info->isdn_driver, info->isdn_channel,
2080 dev->usage[idx]);
2081 #endif
2082 if (
2083 #ifndef FIX_FILE_TRANSFER
2084 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2085 #endif
2086 (info->isdn_driver == -1) &&
2087 (info->isdn_channel == -1) &&
2088 (USG_NONE(dev->usage[idx]))) {
2089 int matchret;
2090
2091 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2092 wret = matchret;
2093 if (!matchret) { /* EAZ is matching */
2094 info->isdn_driver = di;
2095 info->isdn_channel = ch;
2096 info->drv_index = idx;
2097 dev->m_idx[idx] = info->line;
2098 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2099 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2100 strcpy(dev->num[idx], nr);
2101 strcpy(info->emu.cpn, eaz);
2102 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2103 info->emu.mdmreg[REG_PLAN] = setup->plan;
2104 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2105 isdn_info_update();
2106 spin_unlock_irqrestore(&dev->lock, flags);
2107 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2108 info->line);
2109 info->msr |= UART_MSR_RI;
2110 isdn_tty_modem_result(RESULT_RING, info);
2111 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2112 return 1;
2113 }
2114 }
2115 }
2116 }
2117 spin_unlock_irqrestore(&dev->lock, flags);
2118 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2119 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2)) ? "rejected" : "ignored");
2120 return (wret == 2) ? 3 : 0;
2121 }
2122
2123 #define TTY_IS_ACTIVE(info) \
2124 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2125
2126 int
2127 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2128 {
2129 int mi;
2130 modem_info *info;
2131 char *e;
2132
2133 if (i < 0)
2134 return 0;
2135 if ((mi = dev->m_idx[i]) >= 0) {
2136 info = &dev->mdm.info[mi];
2137 switch (c->command) {
2138 case ISDN_STAT_CINF:
2139 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2140 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2141 if (e == (char *)c->parm.num)
2142 info->emu.charge = 0;
2143
2144 break;
2145 case ISDN_STAT_BSENT:
2146 #ifdef ISDN_TTY_STAT_DEBUG
2147 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2148 #endif
2149 if ((info->isdn_driver == c->driver) &&
2150 (info->isdn_channel == c->arg)) {
2151 info->msr |= UART_MSR_CTS;
2152 if (info->send_outstanding)
2153 if (!(--info->send_outstanding))
2154 info->lsr |= UART_LSR_TEMT;
2155 isdn_tty_tint(info);
2156 return 1;
2157 }
2158 break;
2159 case ISDN_STAT_CAUSE:
2160 #ifdef ISDN_TTY_STAT_DEBUG
2161 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2162 #endif
2163 /* Signal cause to tty-device */
2164 strncpy(info->last_cause, c->parm.num, 5);
2165 return 1;
2166 case ISDN_STAT_DISPLAY:
2167 #ifdef ISDN_TTY_STAT_DEBUG
2168 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2169 #endif
2170 /* Signal display to tty-device */
2171 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2172 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2173 isdn_tty_at_cout("\r\n", info);
2174 isdn_tty_at_cout("DISPLAY: ", info);
2175 isdn_tty_at_cout(c->parm.display, info);
2176 isdn_tty_at_cout("\r\n", info);
2177 }
2178 return 1;
2179 case ISDN_STAT_DCONN:
2180 #ifdef ISDN_TTY_STAT_DEBUG
2181 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2182 #endif
2183 if (TTY_IS_ACTIVE(info)) {
2184 if (info->dialing == 1) {
2185 info->dialing = 2;
2186 return 1;
2187 }
2188 }
2189 break;
2190 case ISDN_STAT_DHUP:
2191 #ifdef ISDN_TTY_STAT_DEBUG
2192 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2193 #endif
2194 if (TTY_IS_ACTIVE(info)) {
2195 if (info->dialing == 1)
2196 isdn_tty_modem_result(RESULT_BUSY, info);
2197 if (info->dialing > 1)
2198 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2199 info->dialing = 0;
2200 #ifdef ISDN_DEBUG_MODEM_HUP
2201 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2202 #endif
2203 isdn_tty_modem_hup(info, 0);
2204 return 1;
2205 }
2206 break;
2207 case ISDN_STAT_BCONN:
2208 #ifdef ISDN_TTY_STAT_DEBUG
2209 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2210 #endif
2211 /* Wake up any processes waiting
2212 * for incoming call of this device when
2213 * DCD follow the state of incoming carrier
2214 */
2215 if (info->blocked_open &&
2216 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2217 wake_up_interruptible(&info->open_wait);
2218 }
2219
2220 /* Schedule CONNECT-Message to any tty
2221 * waiting for it and
2222 * set DCD-bit of its modem-status.
2223 */
2224 if (TTY_IS_ACTIVE(info) ||
2225 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2226 info->msr |= UART_MSR_DCD;
2227 info->emu.charge = 0;
2228 if (info->dialing & 0xf)
2229 info->last_dir = 1;
2230 else
2231 info->last_dir = 0;
2232 info->dialing = 0;
2233 info->rcvsched = 1;
2234 if (USG_MODEM(dev->usage[i])) {
2235 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2236 strcpy(info->emu.connmsg, c->parm.num);
2237 isdn_tty_modem_result(RESULT_CONNECT, info);
2238 } else
2239 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2240 }
2241 if (USG_VOICE(dev->usage[i]))
2242 isdn_tty_modem_result(RESULT_VCON, info);
2243 return 1;
2244 }
2245 break;
2246 case ISDN_STAT_BHUP:
2247 #ifdef ISDN_TTY_STAT_DEBUG
2248 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2249 #endif
2250 if (TTY_IS_ACTIVE(info)) {
2251 #ifdef ISDN_DEBUG_MODEM_HUP
2252 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2253 #endif
2254 isdn_tty_modem_hup(info, 0);
2255 return 1;
2256 }
2257 break;
2258 case ISDN_STAT_NODCH:
2259 #ifdef ISDN_TTY_STAT_DEBUG
2260 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2261 #endif
2262 if (TTY_IS_ACTIVE(info)) {
2263 if (info->dialing) {
2264 info->dialing = 0;
2265 info->last_l2 = -1;
2266 info->last_si = 0;
2267 sprintf(info->last_cause, "0000");
2268 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2269 }
2270 isdn_tty_modem_hup(info, 0);
2271 return 1;
2272 }
2273 break;
2274 case ISDN_STAT_UNLOAD:
2275 #ifdef ISDN_TTY_STAT_DEBUG
2276 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2277 #endif
2278 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2279 info = &dev->mdm.info[i];
2280 if (info->isdn_driver == c->driver) {
2281 if (info->online)
2282 isdn_tty_modem_hup(info, 1);
2283 }
2284 }
2285 return 1;
2286 #ifdef CONFIG_ISDN_TTY_FAX
2287 case ISDN_STAT_FAXIND:
2288 if (TTY_IS_ACTIVE(info)) {
2289 isdn_tty_fax_command(info, c);
2290 }
2291 break;
2292 #endif
2293 #ifdef CONFIG_ISDN_AUDIO
2294 case ISDN_STAT_AUDIO:
2295 if (TTY_IS_ACTIVE(info)) {
2296 switch (c->parm.num[0]) {
2297 case ISDN_AUDIO_DTMF:
2298 if (info->vonline) {
2299 isdn_audio_put_dle_code(info,
2300 c->parm.num[1]);
2301 }
2302 break;
2303 }
2304 }
2305 break;
2306 #endif
2307 }
2308 }
2309 return 0;
2310 }
2311
2312 /*********************************************************************
2313 Modem-Emulator-Routines
2314 *********************************************************************/
2315
2316 #define cmdchar(c) ((c >= ' ') && (c <= 0x7f))
2317
2318 /*
2319 * Put a message from the AT-emulator into receive-buffer of tty,
2320 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2321 */
2322 void
2323 isdn_tty_at_cout(char *msg, modem_info *info)
2324 {
2325 struct tty_struct *tty;
2326 atemu *m = &info->emu;
2327 char *p;
2328 char c;
2329 u_long flags;
2330 struct sk_buff *skb = NULL;
2331 char *sp = NULL;
2332 int l;
2333
2334 if (!msg) {
2335 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2336 return;
2337 }
2338
2339 l = strlen(msg);
2340
2341 spin_lock_irqsave(&info->readlock, flags);
2342 tty = info->tty;
2343 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2344 spin_unlock_irqrestore(&info->readlock, flags);
2345 return;
2346 }
2347
2348 /* use queue instead of direct, if online and */
2349 /* data is in queue or buffer is full */
2350 if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2351 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2352 skb = alloc_skb(l, GFP_ATOMIC);
2353 if (!skb) {
2354 spin_unlock_irqrestore(&info->readlock, flags);
2355 return;
2356 }
2357 sp = skb_put(skb, l);
2358 #ifdef CONFIG_ISDN_AUDIO
2359 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2360 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2361 #endif
2362 }
2363
2364 for (p = msg; *p; p++) {
2365 switch (*p) {
2366 case '\r':
2367 c = m->mdmreg[REG_CR];
2368 break;
2369 case '\n':
2370 c = m->mdmreg[REG_LF];
2371 break;
2372 case '\b':
2373 c = m->mdmreg[REG_BS];
2374 break;
2375 default:
2376 c = *p;
2377 }
2378 if (skb) {
2379 *sp++ = c;
2380 } else {
2381 if (tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
2382 break;
2383 }
2384 }
2385 if (skb) {
2386 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2387 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2388 spin_unlock_irqrestore(&info->readlock, flags);
2389 /* Schedule dequeuing */
2390 if (dev->modempoll && info->rcvsched)
2391 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2392
2393 } else {
2394 spin_unlock_irqrestore(&info->readlock, flags);
2395 tty_flip_buffer_push(tty);
2396 }
2397 }
2398
2399 /*
2400 * Perform ATH Hangup
2401 */
2402 static void
2403 isdn_tty_on_hook(modem_info *info)
2404 {
2405 if (info->isdn_channel >= 0) {
2406 #ifdef ISDN_DEBUG_MODEM_HUP
2407 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2408 #endif
2409 isdn_tty_modem_hup(info, 1);
2410 }
2411 }
2412
2413 static void
2414 isdn_tty_off_hook(void)
2415 {
2416 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2417 }
2418
2419 #define PLUSWAIT1 (HZ / 2) /* 0.5 sec. */
2420 #define PLUSWAIT2 (HZ * 3 / 2) /* 1.5 sec */
2421
2422 /*
2423 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2424 * isdn_tty_modem_escape() if sequence found.
2425 *
2426 * Parameters:
2427 * p pointer to databuffer
2428 * plus escape-character
2429 * count length of buffer
2430 * pluscount count of valid escape-characters so far
2431 * lastplus timestamp of last character
2432 */
2433 static void
2434 isdn_tty_check_esc(const u_char *p, u_char plus, int count, int *pluscount,
2435 u_long *lastplus)
2436 {
2437 if (plus > 127)
2438 return;
2439 if (count > 3) {
2440 p += count - 3;
2441 count = 3;
2442 *pluscount = 0;
2443 }
2444 while (count > 0) {
2445 if (*(p++) == plus) {
2446 if ((*pluscount)++) {
2447 /* Time since last '+' > 0.5 sec. ? */
2448 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2449 *pluscount = 1;
2450 } else {
2451 /* Time since last non-'+' < 1.5 sec. ? */
2452 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2453 *pluscount = 0;
2454 }
2455 if ((*pluscount == 3) && (count == 1))
2456 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2457 if (*pluscount > 3)
2458 *pluscount = 1;
2459 } else
2460 *pluscount = 0;
2461 *lastplus = jiffies;
2462 count--;
2463 }
2464 }
2465
2466 /*
2467 * Return result of AT-emulator to tty-receive-buffer, depending on
2468 * modem-register 12, bit 0 and 1.
2469 * For CONNECT-messages also switch to online-mode.
2470 * For RING-message handle auto-ATA if register 0 != 0
2471 */
2472
2473 static void
2474 isdn_tty_modem_result(int code, modem_info *info)
2475 {
2476 atemu *m = &info->emu;
2477 static char *msg[] =
2478 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2479 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2480 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2481 char s[ISDN_MSNLEN + 10];
2482
2483 switch (code) {
2484 case RESULT_RING:
2485 m->mdmreg[REG_RINGCNT]++;
2486 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2487 /* Automatically accept incoming call */
2488 isdn_tty_cmd_ATA(info);
2489 break;
2490 case RESULT_NO_CARRIER:
2491 #ifdef ISDN_DEBUG_MODEM_HUP
2492 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2493 (info->flags & ISDN_ASYNC_CLOSING),
2494 (!info->tty));
2495 #endif
2496 m->mdmreg[REG_RINGCNT] = 0;
2497 del_timer(&info->nc_timer);
2498 info->ncarrier = 0;
2499 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2500 return;
2501 }
2502 #ifdef CONFIG_ISDN_AUDIO
2503 if (info->vonline & 1) {
2504 #ifdef ISDN_DEBUG_MODEM_VOICE
2505 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2506 info->line);
2507 #endif
2508 /* voice-recording, add DLE-ETX */
2509 isdn_tty_at_cout("\020\003", info);
2510 }
2511 if (info->vonline & 2) {
2512 #ifdef ISDN_DEBUG_MODEM_VOICE
2513 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2514 info->line);
2515 #endif
2516 /* voice-playing, add DLE-DC4 */
2517 isdn_tty_at_cout("\020\024", info);
2518 }
2519 #endif
2520 break;
2521 case RESULT_CONNECT:
2522 case RESULT_CONNECT64000:
2523 sprintf(info->last_cause, "0000");
2524 if (!info->online)
2525 info->online = 2;
2526 break;
2527 case RESULT_VCON:
2528 #ifdef ISDN_DEBUG_MODEM_VOICE
2529 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2530 info->line);
2531 #endif
2532 sprintf(info->last_cause, "0000");
2533 if (!info->online)
2534 info->online = 1;
2535 break;
2536 } /* switch (code) */
2537
2538 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2539 /* Show results */
2540 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2541 /* Show numeric results only */
2542 sprintf(s, "\r\n%d\r\n", code);
2543 isdn_tty_at_cout(s, info);
2544 } else {
2545 if (code == RESULT_RING) {
2546 /* return if "show RUNG" and ringcounter>1 */
2547 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2548 (m->mdmreg[REG_RINGCNT] > 1))
2549 return;
2550 /* print CID, _before_ _every_ ring */
2551 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2552 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2553 isdn_tty_at_cout(dev->num[info->drv_index], info);
2554 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2555 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2556 isdn_tty_at_cout(info->emu.cpn, info);
2557 }
2558 }
2559 }
2560 isdn_tty_at_cout("\r\n", info);
2561 isdn_tty_at_cout(msg[code], info);
2562 switch (code) {
2563 case RESULT_CONNECT:
2564 switch (m->mdmreg[REG_L2PROT]) {
2565 case ISDN_PROTO_L2_MODEM:
2566 isdn_tty_at_cout(" ", info);
2567 isdn_tty_at_cout(m->connmsg, info);
2568 break;
2569 }
2570 break;
2571 case RESULT_RING:
2572 /* Append CPN, if enabled */
2573 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2574 sprintf(s, "/%s", m->cpn);
2575 isdn_tty_at_cout(s, info);
2576 }
2577 /* Print CID only once, _after_ 1st RING */
2578 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2579 (m->mdmreg[REG_RINGCNT] == 1)) {
2580 isdn_tty_at_cout("\r\n", info);
2581 isdn_tty_at_cout("CALLER NUMBER: ", info);
2582 isdn_tty_at_cout(dev->num[info->drv_index], info);
2583 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2584 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2585 isdn_tty_at_cout(info->emu.cpn, info);
2586 }
2587 }
2588 break;
2589 case RESULT_NO_CARRIER:
2590 case RESULT_NO_DIALTONE:
2591 case RESULT_BUSY:
2592 case RESULT_NO_ANSWER:
2593 m->mdmreg[REG_RINGCNT] = 0;
2594 /* Append Cause-Message if enabled */
2595 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2596 sprintf(s, "/%s", info->last_cause);
2597 isdn_tty_at_cout(s, info);
2598 }
2599 break;
2600 case RESULT_CONNECT64000:
2601 /* Append Protocol to CONNECT message */
2602 switch (m->mdmreg[REG_L2PROT]) {
2603 case ISDN_PROTO_L2_X75I:
2604 case ISDN_PROTO_L2_X75UI:
2605 case ISDN_PROTO_L2_X75BUI:
2606 isdn_tty_at_cout("/X.75", info);
2607 break;
2608 case ISDN_PROTO_L2_HDLC:
2609 isdn_tty_at_cout("/HDLC", info);
2610 break;
2611 case ISDN_PROTO_L2_V11096:
2612 isdn_tty_at_cout("/V110/9600", info);
2613 break;
2614 case ISDN_PROTO_L2_V11019:
2615 isdn_tty_at_cout("/V110/19200", info);
2616 break;
2617 case ISDN_PROTO_L2_V11038:
2618 isdn_tty_at_cout("/V110/38400", info);
2619 break;
2620 }
2621 if (m->mdmreg[REG_T70] & BIT_T70) {
2622 isdn_tty_at_cout("/T.70", info);
2623 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2624 isdn_tty_at_cout("+", info);
2625 }
2626 break;
2627 }
2628 isdn_tty_at_cout("\r\n", info);
2629 }
2630 }
2631 if (code == RESULT_NO_CARRIER) {
2632 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2633 return;
2634 }
2635 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2636 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2637 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2638 tty_hangup(info->tty);
2639 }
2640 }
2641 }
2642
2643
2644 /*
2645 * Display a modem-register-value.
2646 */
2647 static void
2648 isdn_tty_show_profile(int ridx, modem_info *info)
2649 {
2650 char v[6];
2651
2652 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2653 isdn_tty_at_cout(v, info);
2654 }
2655
2656 /*
2657 * Get MSN-string from char-pointer, set pointer to end of number
2658 */
2659 static void
2660 isdn_tty_get_msnstr(char *n, char **p)
2661 {
2662 int limit = ISDN_MSNLEN - 1;
2663
2664 while (((*p[0] >= '0' && *p[0] <= '9') ||
2665 /* Why a comma ??? */
2666 (*p[0] == ',') || (*p[0] == ':')) &&
2667 (limit--))
2668 *n++ = *p[0]++;
2669 *n = '\0';
2670 }
2671
2672 /*
2673 * Get phone-number from modem-commandbuffer
2674 */
2675 static void
2676 isdn_tty_getdial(char *p, char *q, int cnt)
2677 {
2678 int first = 1;
2679 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2680 buffer overflow */
2681
2682 while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt > 0) {
2683 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2684 ((*p == 'R') && first) ||
2685 (*p == '*') || (*p == '#')) {
2686 *q++ = *p;
2687 limit--;
2688 }
2689 if (!limit)
2690 break;
2691 p++;
2692 first = 0;
2693 }
2694 *q = 0;
2695 }
2696
2697 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2698 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2699
2700 static void
2701 isdn_tty_report(modem_info *info)
2702 {
2703 atemu *m = &info->emu;
2704 char s[80];
2705
2706 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2707 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2708 isdn_tty_at_cout(s, info);
2709 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2710 isdn_tty_at_cout(s, info);
2711 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2712 switch (info->last_l2) {
2713 case ISDN_PROTO_L2_X75I:
2714 isdn_tty_at_cout("X.75i", info);
2715 break;
2716 case ISDN_PROTO_L2_X75UI:
2717 isdn_tty_at_cout("X.75ui", info);
2718 break;
2719 case ISDN_PROTO_L2_X75BUI:
2720 isdn_tty_at_cout("X.75bui", info);
2721 break;
2722 case ISDN_PROTO_L2_HDLC:
2723 isdn_tty_at_cout("HDLC", info);
2724 break;
2725 case ISDN_PROTO_L2_V11096:
2726 isdn_tty_at_cout("V.110 9600 Baud", info);
2727 break;
2728 case ISDN_PROTO_L2_V11019:
2729 isdn_tty_at_cout("V.110 19200 Baud", info);
2730 break;
2731 case ISDN_PROTO_L2_V11038:
2732 isdn_tty_at_cout("V.110 38400 Baud", info);
2733 break;
2734 case ISDN_PROTO_L2_TRANS:
2735 isdn_tty_at_cout("transparent", info);
2736 break;
2737 case ISDN_PROTO_L2_MODEM:
2738 isdn_tty_at_cout("modem", info);
2739 break;
2740 case ISDN_PROTO_L2_FAX:
2741 isdn_tty_at_cout("fax", info);
2742 break;
2743 default:
2744 isdn_tty_at_cout("unknown", info);
2745 break;
2746 }
2747 if (m->mdmreg[REG_T70] & BIT_T70) {
2748 isdn_tty_at_cout("/T.70", info);
2749 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2750 isdn_tty_at_cout("+", info);
2751 }
2752 isdn_tty_at_cout("\r\n", info);
2753 isdn_tty_at_cout(" Service: ", info);
2754 switch (info->last_si) {
2755 case 1:
2756 isdn_tty_at_cout("audio\r\n", info);
2757 break;
2758 case 5:
2759 isdn_tty_at_cout("btx\r\n", info);
2760 break;
2761 case 7:
2762 isdn_tty_at_cout("data\r\n", info);
2763 break;
2764 default:
2765 sprintf(s, "%d\r\n", info->last_si);
2766 isdn_tty_at_cout(s, info);
2767 break;
2768 }
2769 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2770 isdn_tty_at_cout(s, info);
2771 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2772 isdn_tty_at_cout(s, info);
2773 }
2774
2775 /*
2776 * Parse AT&.. commands.
2777 */
2778 static int
2779 isdn_tty_cmd_ATand(char **p, modem_info *info)
2780 {
2781 atemu *m = &info->emu;
2782 int i;
2783 char rb[100];
2784
2785 #define MAXRB (sizeof(rb) - 1)
2786
2787 switch (*p[0]) {
2788 case 'B':
2789 /* &B - Set Buffersize */
2790 p[0]++;
2791 i = isdn_getnum(p);
2792 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2793 PARSE_ERROR1;
2794 #ifdef CONFIG_ISDN_AUDIO
2795 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2796 PARSE_ERROR1;
2797 #endif
2798 m->mdmreg[REG_PSIZE] = i / 16;
2799 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2800 switch (m->mdmreg[REG_L2PROT]) {
2801 case ISDN_PROTO_L2_V11096:
2802 case ISDN_PROTO_L2_V11019:
2803 case ISDN_PROTO_L2_V11038:
2804 info->xmit_size /= 10;
2805 }
2806 break;
2807 case 'C':
2808 /* &C - DCD Status */
2809 p[0]++;
2810 switch (isdn_getnum(p)) {
2811 case 0:
2812 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2813 break;
2814 case 1:
2815 m->mdmreg[REG_DCD] |= BIT_DCD;
2816 break;
2817 default:
2818 PARSE_ERROR1
2819 }
2820 break;
2821 case 'D':
2822 /* &D - Set DTR-Low-behavior */
2823 p[0]++;
2824 switch (isdn_getnum(p)) {
2825 case 0:
2826 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2827 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2828 break;
2829 case 2:
2830 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2831 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2832 break;
2833 case 3:
2834 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2835 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2836 break;
2837 default:
2838 PARSE_ERROR1
2839 }
2840 break;
2841 case 'E':
2842 /* &E -Set EAZ/MSN */
2843 p[0]++;
2844 isdn_tty_get_msnstr(m->msn, p);
2845 break;
2846 case 'F':
2847 /* &F -Set Factory-Defaults */
2848 p[0]++;
2849 if (info->msr & UART_MSR_DCD)
2850 PARSE_ERROR1;
2851 isdn_tty_reset_profile(m);
2852 isdn_tty_modem_reset_regs(info, 1);
2853 break;
2854 #ifdef DUMMY_HAYES_AT
2855 case 'K':
2856 /* only for be compilant with common scripts */
2857 /* &K Flowcontrol - no function */
2858 p[0]++;
2859 isdn_getnum(p);
2860 break;
2861 #endif
2862 case 'L':
2863 /* &L -Set Numbers to listen on */
2864 p[0]++;
2865 i = 0;
2866 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2867 (i < ISDN_LMSNLEN - 1))
2868 m->lmsn[i++] = *p[0]++;
2869 m->lmsn[i] = '\0';
2870 break;
2871 case 'R':
2872 /* &R - Set V.110 bitrate adaption */
2873 p[0]++;
2874 i = isdn_getnum(p);
2875 switch (i) {
2876 case 0:
2877 /* Switch off V.110, back to X.75 */
2878 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2879 m->mdmreg[REG_SI2] = 0;
2880 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2881 break;
2882 case 9600:
2883 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2884 m->mdmreg[REG_SI2] = 197;
2885 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2886 break;
2887 case 19200:
2888 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2889 m->mdmreg[REG_SI2] = 199;
2890 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2891 break;
2892 case 38400:
2893 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2894 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2895 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2896 break;
2897 default:
2898 PARSE_ERROR1;
2899 }
2900 /* Switch off T.70 */
2901 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2902 /* Set Service 7 */
2903 m->mdmreg[REG_SI1] |= 4;
2904 break;
2905 case 'S':
2906 /* &S - Set Windowsize */
2907 p[0]++;
2908 i = isdn_getnum(p);
2909 if ((i > 0) && (i < 9))
2910 m->mdmreg[REG_WSIZE] = i;
2911 else
2912 PARSE_ERROR1;
2913 break;
2914 case 'V':
2915 /* &V - Show registers */
2916 p[0]++;
2917 isdn_tty_at_cout("\r\n", info);
2918 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2919 sprintf(rb, "S%02d=%03d%s", i,
2920 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2921 isdn_tty_at_cout(rb, info);
2922 }
2923 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2924 strlen(m->msn) ? m->msn : "None");
2925 isdn_tty_at_cout(rb, info);
2926 if (strlen(m->lmsn)) {
2927 isdn_tty_at_cout("\r\nListen: ", info);
2928 isdn_tty_at_cout(m->lmsn, info);
2929 isdn_tty_at_cout("\r\n", info);
2930 }
2931 break;
2932 case 'W':
2933 /* &W - Write Profile */
2934 p[0]++;
2935 switch (*p[0]) {
2936 case '0':
2937 p[0]++;
2938 modem_write_profile(m);
2939 break;
2940 default:
2941 PARSE_ERROR1;
2942 }
2943 break;
2944 case 'X':
2945 /* &X - Switch to BTX-Mode and T.70 */
2946 p[0]++;
2947 switch (isdn_getnum(p)) {
2948 case 0:
2949 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2950 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2951 break;
2952 case 1:
2953 m->mdmreg[REG_T70] |= BIT_T70;
2954 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2955 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2956 info->xmit_size = 112;
2957 m->mdmreg[REG_SI1] = 4;
2958 m->mdmreg[REG_SI2] = 0;
2959 break;
2960 case 2:
2961 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2962 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2963 info->xmit_size = 112;
2964 m->mdmreg[REG_SI1] = 4;
2965 m->mdmreg[REG_SI2] = 0;
2966 break;
2967 default:
2968 PARSE_ERROR1;
2969 }
2970 break;
2971 default:
2972 PARSE_ERROR1;
2973 }
2974 return 0;
2975 }
2976
2977 static int
2978 isdn_tty_check_ats(int mreg, int mval, modem_info *info, atemu *m)
2979 {
2980 /* Some plausibility checks */
2981 switch (mreg) {
2982 case REG_L2PROT:
2983 if (mval > ISDN_PROTO_L2_MAX)
2984 return 1;
2985 break;
2986 case REG_PSIZE:
2987 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2988 return 1;
2989 #ifdef CONFIG_ISDN_AUDIO
2990 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
2991 return 1;
2992 #endif
2993 info->xmit_size = mval * 16;
2994 switch (m->mdmreg[REG_L2PROT]) {
2995 case ISDN_PROTO_L2_V11096:
2996 case ISDN_PROTO_L2_V11019:
2997 case ISDN_PROTO_L2_V11038:
2998 info->xmit_size /= 10;
2999 }
3000 break;
3001 case REG_SI1I:
3002 case REG_PLAN:
3003 case REG_SCREEN:
3004 /* readonly registers */
3005 return 1;
3006 }
3007 return 0;
3008 }
3009
3010 /*
3011 * Perform ATS command
3012 */
3013 static int
3014 isdn_tty_cmd_ATS(char **p, modem_info *info)
3015 {
3016 atemu *m = &info->emu;
3017 int bitpos;
3018 int mreg;
3019 int mval;
3020 int bval;
3021
3022 mreg = isdn_getnum(p);
3023 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3024 PARSE_ERROR1;
3025 switch (*p[0]) {
3026 case '=':
3027 p[0]++;
3028 mval = isdn_getnum(p);
3029 if (mval < 0 || mval > 255)
3030 PARSE_ERROR1;
3031 if (isdn_tty_check_ats(mreg, mval, info, m))
3032 PARSE_ERROR1;
3033 m->mdmreg[mreg] = mval;
3034 break;
3035 case '.':
3036 /* Set/Clear a single bit */
3037 p[0]++;
3038 bitpos = isdn_getnum(p);
3039 if ((bitpos < 0) || (bitpos > 7))
3040 PARSE_ERROR1;
3041 switch (*p[0]) {
3042 case '=':
3043 p[0]++;
3044 bval = isdn_getnum(p);
3045 if (bval < 0 || bval > 1)
3046 PARSE_ERROR1;
3047 if (bval)
3048 mval = m->mdmreg[mreg] | (1 << bitpos);
3049 else
3050 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3051 if (isdn_tty_check_ats(mreg, mval, info, m))
3052 PARSE_ERROR1;
3053 m->mdmreg[mreg] = mval;
3054 break;
3055 case '?':
3056 p[0]++;
3057 isdn_tty_at_cout("\r\n", info);
3058 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3059 info);
3060 break;
3061 default:
3062 PARSE_ERROR1;
3063 }
3064 break;
3065 case '?':
3066 p[0]++;
3067 isdn_tty_show_profile(mreg, info);
3068 break;
3069 default:
3070 PARSE_ERROR1;
3071 break;
3072 }
3073 return 0;
3074 }
3075
3076 /*
3077 * Perform ATA command
3078 */
3079 static void
3080 isdn_tty_cmd_ATA(modem_info *info)
3081 {
3082 atemu *m = &info->emu;
3083 isdn_ctrl cmd;
3084 int l2;
3085
3086 if (info->msr & UART_MSR_RI) {
3087 /* Accept incoming call */
3088 info->last_dir = 0;
3089 strcpy(info->last_num, dev->num[info->drv_index]);
3090 m->mdmreg[REG_RINGCNT] = 0;
3091 info->msr &= ~UART_MSR_RI;
3092 l2 = m->mdmreg[REG_L2PROT];
3093 #ifdef CONFIG_ISDN_AUDIO
3094 /* If more than one bit set in reg18, autoselect Layer2 */
3095 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3096 if (m->mdmreg[REG_SI1I] == 1) {
3097 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3098 l2 = ISDN_PROTO_L2_TRANS;
3099 } else
3100 l2 = ISDN_PROTO_L2_X75I;
3101 }
3102 #endif
3103 cmd.driver = info->isdn_driver;
3104 cmd.command = ISDN_CMD_SETL2;
3105 cmd.arg = info->isdn_channel + (l2 << 8);
3106 info->last_l2 = l2;
3107 isdn_command(&cmd);
3108 cmd.driver = info->isdn_driver;
3109 cmd.command = ISDN_CMD_SETL3;
3110 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3111 #ifdef CONFIG_ISDN_TTY_FAX
3112 if (l2 == ISDN_PROTO_L2_FAX) {
3113 cmd.parm.fax = info->fax;
3114 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3115 }
3116 #endif
3117 isdn_command(&cmd);
3118 cmd.driver = info->isdn_driver;
3119 cmd.arg = info->isdn_channel;
3120 cmd.command = ISDN_CMD_ACCEPTD;
3121 info->dialing = 16;
3122 info->emu.carrierwait = 0;
3123 isdn_command(&cmd);
3124 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3125 } else
3126 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3127 }
3128
3129 #ifdef CONFIG_ISDN_AUDIO
3130 /*
3131 * Parse AT+F.. commands
3132 */
3133 static int
3134 isdn_tty_cmd_PLUSF(char **p, modem_info *info)
3135 {
3136 atemu *m = &info->emu;
3137 char rs[20];
3138
3139 if (!strncmp(p[0], "CLASS", 5)) {
3140 p[0] += 5;
3141 switch (*p[0]) {
3142 case '?':
3143 p[0]++;
3144 sprintf(rs, "\r\n%d",
3145 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3146 #ifdef CONFIG_ISDN_TTY_FAX
3147 if (TTY_IS_FCLASS2(info))
3148 sprintf(rs, "\r\n2");
3149 else if (TTY_IS_FCLASS1(info))
3150 sprintf(rs, "\r\n1");
3151 #endif
3152 isdn_tty_at_cout(rs, info);
3153 break;
3154 case '=':
3155 p[0]++;
3156 switch (*p[0]) {
3157 case '0':
3158 p[0]++;
3159 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3160 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3161 m->mdmreg[REG_SI1] = 4;
3162 info->xmit_size =
3163 m->mdmreg[REG_PSIZE] * 16;
3164 break;
3165 #ifdef CONFIG_ISDN_TTY_FAX
3166 case '1':
3167 p[0]++;
3168 if (!(dev->global_features &
3169 ISDN_FEATURE_L3_FCLASS1))
3170 PARSE_ERROR1;
3171 m->mdmreg[REG_SI1] = 1;
3172 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3173 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3174 info->xmit_size =
3175 m->mdmreg[REG_PSIZE] * 16;
3176 break;
3177 case '2':
3178 p[0]++;
3179 if (!(dev->global_features &
3180 ISDN_FEATURE_L3_FCLASS2))
3181 PARSE_ERROR1;
3182 m->mdmreg[REG_SI1] = 1;
3183 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3184 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3185 info->xmit_size =
3186 m->mdmreg[REG_PSIZE] * 16;
3187 break;
3188 #endif
3189 case '8':
3190 p[0]++;
3191 /* L2 will change on dialout with si=1 */
3192 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3193 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3194 m->mdmreg[REG_SI1] = 5;
3195 info->xmit_size = VBUF;
3196 break;
3197 case '?':
3198 p[0]++;
3199 strcpy(rs, "\r\n0,");
3200 #ifdef CONFIG_ISDN_TTY_FAX
3201 if (dev->global_features &
3202 ISDN_FEATURE_L3_FCLASS1)
3203 strcat(rs, "1,");
3204 if (dev->global_features &
3205 ISDN_FEATURE_L3_FCLASS2)
3206 strcat(rs, "2,");
3207 #endif
3208 strcat(rs, "8");
3209 isdn_tty_at_cout(rs, info);
3210 break;
3211 default:
3212 PARSE_ERROR1;
3213 }
3214 break;
3215 default:
3216 PARSE_ERROR1;
3217 }
3218 return 0;
3219 }
3220 #ifdef CONFIG_ISDN_TTY_FAX
3221 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3222 #else
3223 PARSE_ERROR1;
3224 #endif
3225 }
3226
3227 /*
3228 * Parse AT+V.. commands
3229 */
3230 static int
3231 isdn_tty_cmd_PLUSV(char **p, modem_info *info)
3232 {
3233 atemu *m = &info->emu;
3234 isdn_ctrl cmd;
3235 static char *vcmd[] =
3236 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3237 int i;
3238 int par1;
3239 int par2;
3240 char rs[20];
3241
3242 i = 0;
3243 while (vcmd[i]) {
3244 if (!strncmp(vcmd[i], p[0], 2)) {
3245 p[0] += 2;
3246 break;
3247 }
3248 i++;
3249 }
3250 switch (i) {
3251 case 0:
3252 /* AT+VNH - Auto hangup feature */
3253 switch (*p[0]) {
3254 case '?':
3255 p[0]++;
3256 isdn_tty_at_cout("\r\n1", info);
3257 break;
3258 case '=':
3259 p[0]++;
3260 switch (*p[0]) {
3261 case '1':
3262 p[0]++;
3263 break;
3264 case '?':
3265 p[0]++;
3266 isdn_tty_at_cout("\r\n1", info);
3267 break;
3268 default:
3269 PARSE_ERROR1;
3270 }
3271 break;
3272 default:
3273 PARSE_ERROR1;
3274 }
3275 break;
3276 case 1:
3277 /* AT+VIP - Reset all voice parameters */
3278 isdn_tty_modem_reset_vpar(m);
3279 break;
3280 case 2:
3281 /* AT+VLS - Select device, accept incoming call */
3282 switch (*p[0]) {
3283 case '?':
3284 p[0]++;
3285 sprintf(rs, "\r\n%d", m->vpar[0]);
3286 isdn_tty_at_cout(rs, info);
3287 break;
3288 case '=':
3289 p[0]++;
3290 switch (*p[0]) {
3291 case '0':
3292 p[0]++;
3293 m->vpar[0] = 0;
3294 break;
3295 case '2':
3296 p[0]++;
3297 m->vpar[0] = 2;
3298 break;
3299 case '?':
3300 p[0]++;
3301 isdn_tty_at_cout("\r\n0,2", info);
3302 break;
3303 default:
3304 PARSE_ERROR1;
3305 }
3306 break;
3307 default:
3308 PARSE_ERROR1;
3309 }
3310 break;
3311 case 3:
3312 /* AT+VRX - Start recording */
3313 if (!m->vpar[0])
3314 PARSE_ERROR1;
3315 if (info->online != 1) {
3316 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3317 return 1;
3318 }
3319 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3320 if (!info->dtmf_state) {
3321 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3322 PARSE_ERROR1;
3323 }
3324 info->silence_state = isdn_audio_silence_init(info->silence_state);
3325 if (!info->silence_state) {
3326 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3327 PARSE_ERROR1;
3328 }
3329 if (m->vpar[3] < 5) {
3330 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3331 if (!info->adpcmr) {
3332 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3333 PARSE_ERROR1;
3334 }
3335 }
3336 #ifdef ISDN_DEBUG_AT
3337 printk(KERN_DEBUG "AT: +VRX\n");
3338 #endif
3339 info->vonline |= 1;
3340 isdn_tty_modem_result(RESULT_CONNECT, info);
3341 return 0;
3342 break;
3343 case 4:
3344 /* AT+VSD - Silence detection */
3345 switch (*p[0]) {
3346 case '?':
3347 p[0]++;
3348 sprintf(rs, "\r\n<%d>,<%d>",
3349 m->vpar[1],
3350 m->vpar[2]);
3351 isdn_tty_at_cout(rs, info);
3352 break;
3353 case '=':
3354 p[0]++;
3355 if ((*p[0] >= '0') && (*p[0] <= '9')) {
3356 par1 = isdn_getnum(p);
3357 if ((par1 < 0) || (par1 > 31))
3358 PARSE_ERROR1;
3359 if (*p[0] != ',')
3360 PARSE_ERROR1;
3361 p[0]++;
3362 par2 = isdn_getnum(p);
3363 if ((par2 < 0) || (par2 > 255))
3364 PARSE_ERROR1;
3365 m->vpar[1] = par1;
3366 m->vpar[2] = par2;
3367 break;
3368 } else
3369 if (*p[0] == '?') {
3370 p[0]++;
3371 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3372 info);
3373 break;
3374 } else
3375 PARSE_ERROR1;
3376 break;
3377 default:
3378 PARSE_ERROR1;
3379 }
3380 break;
3381 case 5:
3382 /* AT+VSM - Select compression */
3383 switch (*p[0]) {
3384 case '?':
3385 p[0]++;
3386 sprintf(rs, "\r\n<%d>,<%d><8000>",
3387 m->vpar[3],
3388 m->vpar[1]);
3389 isdn_tty_at_cout(rs, info);
3390 break;
3391 case '=':
3392 p[0]++;
3393 switch (*p[0]) {
3394 case '2':
3395 case '3':
3396 case '4':
3397 case '5':
3398 case '6':
3399 par1 = isdn_getnum(p);
3400 if ((par1 < 2) || (par1 > 6))
3401 PARSE_ERROR1;
3402 m->vpar[3] = par1;
3403 break;
3404 case '?':
3405 p[0]++;
3406 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3407 info);
3408 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3409 info);
3410 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3411 info);
3412 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3413 info);
3414 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3415 info);
3416 break;
3417 default:
3418 PARSE_ERROR1;
3419 }
3420 break;
3421 default:
3422 PARSE_ERROR1;
3423 }
3424 break;
3425 case 6:
3426 /* AT+VTX - Start sending */
3427 if (!m->vpar[0])
3428 PARSE_ERROR1;
3429 if (info->online != 1) {
3430 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3431 return 1;
3432 }
3433 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3434 if (!info->dtmf_state) {
3435 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3436 PARSE_ERROR1;
3437 }
3438 if (m->vpar[3] < 5) {
3439 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3440 if (!info->adpcms) {
3441 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3442 PARSE_ERROR1;
3443 }
3444 }
3445 #ifdef ISDN_DEBUG_AT
3446 printk(KERN_DEBUG "AT: +VTX\n");
3447 #endif
3448 m->lastDLE = 0;
3449 info->vonline |= 2;
3450 isdn_tty_modem_result(RESULT_CONNECT, info);
3451 return 0;
3452 break;
3453 case 7:
3454 /* AT+VDD - DTMF detection */
3455 switch (*p[0]) {
3456 case '?':
3457 p[0]++;
3458 sprintf(rs, "\r\n<%d>,<%d>",
3459 m->vpar[4],
3460 m->vpar[5]);
3461 isdn_tty_at_cout(rs, info);
3462 break;
3463 case '=':
3464 p[0]++;
3465 if ((*p[0] >= '0') && (*p[0] <= '9')) {
3466 if (info->online != 1)
3467 PARSE_ERROR1;
3468 par1 = isdn_getnum(p);
3469 if ((par1 < 0) || (par1 > 15))
3470 PARSE_ERROR1;
3471 if (*p[0] != ',')
3472 PARSE_ERROR1;
3473 p[0]++;
3474 par2 = isdn_getnum(p);
3475 if ((par2 < 0) || (par2 > 255))
3476 PARSE_ERROR1;
3477 m->vpar[4] = par1;
3478 m->vpar[5] = par2;
3479 cmd.driver = info->isdn_driver;
3480 cmd.command = ISDN_CMD_AUDIO;
3481 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3482 cmd.parm.num[0] = par1;
3483 cmd.parm.num[1] = par2;
3484 isdn_command(&cmd);
3485 break;
3486 } else
3487 if (*p[0] == '?') {
3488 p[0]++;
3489 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3490 info);
3491 break;
3492 } else
3493 PARSE_ERROR1;
3494 break;
3495 default:
3496 PARSE_ERROR1;
3497 }
3498 break;
3499 default:
3500 PARSE_ERROR1;
3501 }
3502 return 0;
3503 }
3504 #endif /* CONFIG_ISDN_AUDIO */
3505
3506 /*
3507 * Parse and perform an AT-command-line.
3508 */
3509 static void
3510 isdn_tty_parse_at(modem_info *info)
3511 {
3512 atemu *m = &info->emu;
3513 char *p;
3514 char ds[ISDN_MSNLEN];
3515
3516 #ifdef ISDN_DEBUG_AT
3517 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3518 #endif
3519 for (p = &m->mdmcmd[2]; *p;) {
3520 switch (*p) {
3521 case ' ':
3522 p++;
3523 break;
3524 case 'A':
3525 /* A - Accept incoming call */
3526 p++;
3527 isdn_tty_cmd_ATA(info);
3528 return;
3529 break;
3530 case 'D':
3531 /* D - Dial */
3532 if (info->msr & UART_MSR_DCD)
3533 PARSE_ERROR;
3534 if (info->msr & UART_MSR_RI) {
3535 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3536 return;
3537 }
3538 isdn_tty_getdial(++p, ds, sizeof ds);
3539 p += strlen(p);
3540 if (!strlen(m->msn))
3541 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3542 else if (strlen(ds))
3543 isdn_tty_dial(ds, info, m);
3544 else
3545 PARSE_ERROR;
3546 return;
3547 case 'E':
3548 /* E - Turn Echo on/off */
3549 p++;
3550 switch (isdn_getnum(&p)) {
3551 case 0:
3552 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3553 break;
3554 case 1:
3555 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3556 break;
3557 default:
3558 PARSE_ERROR;
3559 }
3560 break;
3561 case 'H':
3562 /* H - On/Off-hook */
3563 p++;
3564 switch (*p) {
3565 case '0':
3566 p++;
3567 isdn_tty_on_hook(info);
3568 break;
3569 case '1':
3570 p++;
3571 isdn_tty_off_hook();
3572 break;
3573 default:
3574 isdn_tty_on_hook(info);
3575 break;
3576 }
3577 break;
3578 case 'I':
3579 /* I - Information */
3580 p++;
3581 isdn_tty_at_cout("\r\nLinux ISDN", info);
3582 switch (*p) {
3583 case '0':
3584 case '1':
3585 p++;
3586 break;
3587 case '2':
3588 p++;
3589 isdn_tty_report(info);
3590 break;
3591 case '3':
3592 p++;
3593 snprintf(ds, sizeof(ds), "\r\n%d", info->emu.charge);
3594 isdn_tty_at_cout(ds, info);
3595 break;
3596 default:;
3597 }
3598 break;
3599 #ifdef DUMMY_HAYES_AT
3600 case 'L':
3601 case 'M':
3602 /* only for be compilant with common scripts */
3603 /* no function */
3604 p++;
3605 isdn_getnum(&p);
3606 break;
3607 #endif
3608 case 'O':
3609 /* O - Go online */
3610 p++;
3611 if (info->msr & UART_MSR_DCD)
3612 /* if B-Channel is up */
3613 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT : RESULT_CONNECT64000, info);
3614 else
3615 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3616 return;
3617 case 'Q':
3618 /* Q - Turn Emulator messages on/off */
3619 p++;
3620 switch (isdn_getnum(&p)) {
3621 case 0:
3622 m->mdmreg[REG_RESP] |= BIT_RESP;
3623 break;
3624 case 1:
3625 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3626 break;
3627 default:
3628 PARSE_ERROR;
3629 }
3630 break;
3631 case 'S':
3632 /* S - Set/Get Register */
3633 p++;
3634 if (isdn_tty_cmd_ATS(&p, info))
3635 return;
3636 break;
3637 case 'V':
3638 /* V - Numeric or ASCII Emulator-messages */
3639 p++;
3640 switch (isdn_getnum(&p)) {
3641 case 0:
3642 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3643 break;
3644 case 1:
3645 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3646 break;
3647 default:
3648 PARSE_ERROR;
3649 }
3650 break;
3651 case 'Z':
3652 /* Z - Load Registers from Profile */
3653 p++;
3654 if (info->msr & UART_MSR_DCD) {
3655 info->online = 0;
3656 isdn_tty_on_hook(info);
3657 }
3658 isdn_tty_modem_reset_regs(info, 1);
3659 break;
3660 case '+':
3661 p++;
3662 switch (*p) {
3663 #ifdef CONFIG_ISDN_AUDIO
3664 case 'F':
3665 p++;
3666 if (isdn_tty_cmd_PLUSF(&p, info))
3667 return;
3668 break;
3669 case 'V':
3670 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3671 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3672 PARSE_ERROR;
3673 p++;
3674 if (isdn_tty_cmd_PLUSV(&p, info))
3675 return;
3676 break;
3677 #endif /* CONFIG_ISDN_AUDIO */
3678 case 'S': /* SUSPEND */
3679 p++;
3680 isdn_tty_get_msnstr(ds, &p);
3681 isdn_tty_suspend(ds, info, m);
3682 break;
3683 case 'R': /* RESUME */
3684 p++;
3685 isdn_tty_get_msnstr(ds, &p);
3686 isdn_tty_resume(ds, info, m);
3687 break;
3688 case 'M': /* MESSAGE */
3689 p++;
3690 isdn_tty_send_msg(info, m, p);
3691 break;
3692 default:
3693 PARSE_ERROR;
3694 }
3695 break;
3696 case '&':
3697 p++;
3698 if (isdn_tty_cmd_ATand(&p, info))
3699 return;
3700 break;
3701 default:
3702 PARSE_ERROR;
3703 }
3704 }
3705 #ifdef CONFIG_ISDN_AUDIO
3706 if (!info->vonline)
3707 #endif
3708 isdn_tty_modem_result(RESULT_OK, info);
3709 }
3710
3711 /* Need own toupper() because standard-toupper is not available
3712 * within modules.
3713 */
3714 #define my_toupper(c) (((c >= 'a') && (c <= 'z')) ? (c & 0xdf) : c)
3715
3716 /*
3717 * Perform line-editing of AT-commands
3718 *
3719 * Parameters:
3720 * p inputbuffer
3721 * count length of buffer
3722 * channel index to line (minor-device)
3723 */
3724 static int
3725 isdn_tty_edit_at(const char *p, int count, modem_info *info)
3726 {
3727 atemu *m = &info->emu;
3728 int total = 0;
3729 u_char c;
3730 char eb[2];
3731 int cnt;
3732
3733 for (cnt = count; cnt > 0; p++, cnt--) {
3734 c = *p;
3735 total++;
3736 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3737 /* Separator (CR or LF) */
3738 m->mdmcmd[m->mdmcmdl] = 0;
3739 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3740 eb[0] = c;
3741 eb[1] = 0;
3742 isdn_tty_at_cout(eb, info);
3743 }
3744 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3745 isdn_tty_parse_at(info);
3746 m->mdmcmdl = 0;
3747 continue;
3748 }
3749 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3750 /* Backspace-Function */
3751 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3752 if (m->mdmcmdl)
3753 m->mdmcmdl--;
3754 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3755 isdn_tty_at_cout("\b", info);
3756 }
3757 continue;
3758 }
3759 if (cmdchar(c)) {
3760 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3761 eb[0] = c;
3762 eb[1] = 0;
3763 isdn_tty_at_cout(eb, info);
3764 }
3765 if (m->mdmcmdl < 255) {
3766 c = my_toupper(c);
3767 switch (m->mdmcmdl) {
3768 case 1:
3769 if (c == 'T') {
3770 m->mdmcmd[m->mdmcmdl] = c;
3771 m->mdmcmd[++m->mdmcmdl] = 0;
3772 break;
3773 } else
3774 m->mdmcmdl = 0;
3775 /* Fall through, check for 'A' */
3776 case 0:
3777 if (c == 'A') {
3778 m->mdmcmd[m->mdmcmdl] = c;
3779 m->mdmcmd[++m->mdmcmdl] = 0;
3780 }
3781 break;
3782 default:
3783 m->mdmcmd[m->mdmcmdl] = c;
3784 m->mdmcmd[++m->mdmcmdl] = 0;
3785 }
3786 }
3787 }
3788 }
3789 return total;
3790 }
3791
3792 /*
3793 * Switch all modem-channels who are online and got a valid
3794 * escape-sequence 1.5 seconds ago, to command-mode.
3795 * This function is called every second via timer-interrupt from within
3796 * timer-dispatcher isdn_timer_function()
3797 */
3798 void
3799 isdn_tty_modem_escape(void)
3800 {
3801 int ton = 0;
3802 int i;
3803 int midx;
3804
3805 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3806 if (USG_MODEM(dev->usage[i]))
3807 if ((midx = dev->m_idx[i]) >= 0) {
3808 modem_info *info = &dev->mdm.info[midx];
3809 if (info->online) {
3810 ton = 1;
3811 if ((info->emu.pluscount == 3) &&
3812 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3813 info->emu.pluscount = 0;
3814 info->online = 0;
3815 isdn_tty_modem_result(RESULT_OK, info);
3816 }
3817 }
3818 }
3819 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3820 }
3821
3822 /*
3823 * Put a RING-message to all modem-channels who have the RI-bit set.
3824 * This function is called every second via timer-interrupt from within
3825 * timer-dispatcher isdn_timer_function()
3826 */
3827 void
3828 isdn_tty_modem_ring(void)
3829 {
3830 int ton = 0;
3831 int i;
3832
3833 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3834 modem_info *info = &dev->mdm.info[i];
3835 if (info->msr & UART_MSR_RI) {
3836 ton = 1;
3837 isdn_tty_modem_result(RESULT_RING, info);
3838 }
3839 }
3840 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3841 }
3842
3843 /*
3844 * For all online tty's, try sending data to
3845 * the lower levels.
3846 */
3847 void
3848 isdn_tty_modem_xmit(void)
3849 {
3850 int ton = 1;
3851 int i;
3852
3853 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3854 modem_info *info = &dev->mdm.info[i];
3855 if (info->online) {
3856 ton = 1;
3857 isdn_tty_senddown(info);
3858 isdn_tty_tint(info);
3859 }
3860 }
3861 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3862 }
3863
3864 /*
3865 * Check all channels if we have a 'no carrier' timeout.
3866 * Timeout value is set by Register S7.
3867 */
3868 void
3869 isdn_tty_carrier_timeout(void)
3870 {
3871 int ton = 0;
3872 int i;
3873
3874 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3875 modem_info *info = &dev->mdm.info[i];
3876 if (info->dialing) {
3877 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3878 info->dialing = 0;
3879 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3880 isdn_tty_modem_hup(info, 1);
3881 }
3882 else
3883 ton = 1;
3884 }
3885 }
3886 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3887 }
Linux kernel - Deliverables
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