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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / isdn / i4l / isdn_tty.c
blobe5546cb3ac691666048bae0678af98175a26a376
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
754 int
755 isdn_tty_capi_facility(capi_msg *cm) {
756 return(-1); /* dummy */
757 }
758
759 /* isdn_tty_suspend() tries to suspend the current tty connection
760 */
761 static void
762 isdn_tty_suspend(char *id, modem_info * info, atemu * m)
763 {
764 isdn_ctrl cmd;
765
766 int l;
767
768 if (!info)
769 return;
770
771 #ifdef ISDN_DEBUG_MODEM_SERVICES
772 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
773 #endif
774 l = strlen(id);
775 if ((info->isdn_driver >= 0)) {
776 cmd.parm.cmsg.Length = l+18;
777 cmd.parm.cmsg.Command = CAPI_FACILITY;
778 cmd.parm.cmsg.Subcommand = CAPI_REQ;
779 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
780 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
781 cmd.parm.cmsg.para[1] = 0;
782 cmd.parm.cmsg.para[2] = l + 3;
783 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
784 cmd.parm.cmsg.para[4] = 0;
785 cmd.parm.cmsg.para[5] = l;
786 strncpy(&cmd.parm.cmsg.para[6], id, l);
787 cmd.command = CAPI_PUT_MESSAGE;
788 cmd.driver = info->isdn_driver;
789 cmd.arg = info->isdn_channel;
790 isdn_command(&cmd);
791 }
792 }
793
794 /* isdn_tty_resume() tries to resume a suspended call
795 * setup of the lower levels before that. unfortunately here is no
796 * checking for compatibility of used protocols implemented by Q931
797 * It does the same things like isdn_tty_dial, the last command
798 * is different, may be we can merge it.
799 */
800
801 static void
802 isdn_tty_resume(char *id, modem_info * info, atemu * m)
803 {
804 int usg = ISDN_USAGE_MODEM;
805 int si = 7;
806 int l2 = m->mdmreg[REG_L2PROT];
807 isdn_ctrl cmd;
808 ulong flags;
809 int i;
810 int j;
811 int l;
812
813 l = strlen(id);
814 for (j = 7; j >= 0; j--)
815 if (m->mdmreg[REG_SI1] & (1 << j)) {
816 si = bit2si[j];
817 break;
818 }
819 usg = isdn_calc_usage(si, l2);
820 #ifdef CONFIG_ISDN_AUDIO
821 if ((si == 1) &&
822 (l2 != ISDN_PROTO_L2_MODEM)
823 #ifdef CONFIG_ISDN_TTY_FAX
824 && (l2 != ISDN_PROTO_L2_FAX)
825 #endif
826 ) {
827 l2 = ISDN_PROTO_L2_TRANS;
828 usg = ISDN_USAGE_VOICE;
829 }
830 #endif
831 m->mdmreg[REG_SI1I] = si2bit[si];
832 spin_lock_irqsave(&dev->lock, flags);
833 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
834 if (i < 0) {
835 spin_unlock_irqrestore(&dev->lock, flags);
836 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
837 } else {
838 info->isdn_driver = dev->drvmap[i];
839 info->isdn_channel = dev->chanmap[i];
840 info->drv_index = i;
841 dev->m_idx[i] = info->line;
842 dev->usage[i] |= ISDN_USAGE_OUTGOING;
843 info->last_dir = 1;
844 // strcpy(info->last_num, n);
845 isdn_info_update();
846 spin_unlock_irqrestore(&dev->lock, flags);
847 cmd.driver = info->isdn_driver;
848 cmd.arg = info->isdn_channel;
849 cmd.command = ISDN_CMD_CLREAZ;
850 isdn_command(&cmd);
851 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
852 cmd.driver = info->isdn_driver;
853 cmd.command = ISDN_CMD_SETEAZ;
854 isdn_command(&cmd);
855 cmd.driver = info->isdn_driver;
856 cmd.command = ISDN_CMD_SETL2;
857 info->last_l2 = l2;
858 cmd.arg = info->isdn_channel + (l2 << 8);
859 isdn_command(&cmd);
860 cmd.driver = info->isdn_driver;
861 cmd.command = ISDN_CMD_SETL3;
862 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
863 isdn_command(&cmd);
864 cmd.driver = info->isdn_driver;
865 cmd.arg = info->isdn_channel;
866 cmd.parm.cmsg.Length = l+18;
867 cmd.parm.cmsg.Command = CAPI_FACILITY;
868 cmd.parm.cmsg.Subcommand = CAPI_REQ;
869 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
870 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
871 cmd.parm.cmsg.para[1] = 0;
872 cmd.parm.cmsg.para[2] = l+3;
873 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
874 cmd.parm.cmsg.para[4] = 0;
875 cmd.parm.cmsg.para[5] = l;
876 strncpy(&cmd.parm.cmsg.para[6], id, l);
877 cmd.command =CAPI_PUT_MESSAGE;
878 info->dialing = 1;
879 // strcpy(dev->num[i], n);
880 isdn_info_update();
881 isdn_command(&cmd);
882 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
883 }
884 }
885
886 /* isdn_tty_send_msg() sends a message to a HL driver
887 * This is used for hybrid modem cards to send AT commands to it
888 */
889
890 static void
891 isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
892 {
893 int usg = ISDN_USAGE_MODEM;
894 int si = 7;
895 int l2 = m->mdmreg[REG_L2PROT];
896 isdn_ctrl cmd;
897 ulong flags;
898 int i;
899 int j;
900 int l;
901
902 l = strlen(msg);
903 if (!l) {
904 isdn_tty_modem_result(RESULT_ERROR, info);
905 return;
906 }
907 for (j = 7; j >= 0; j--)
908 if (m->mdmreg[REG_SI1] & (1 << j)) {
909 si = bit2si[j];
910 break;
911 }
912 usg = isdn_calc_usage(si, l2);
913 #ifdef CONFIG_ISDN_AUDIO
914 if ((si == 1) &&
915 (l2 != ISDN_PROTO_L2_MODEM)
916 #ifdef CONFIG_ISDN_TTY_FAX
917 && (l2 != ISDN_PROTO_L2_FAX)
918 #endif
919 ) {
920 l2 = ISDN_PROTO_L2_TRANS;
921 usg = ISDN_USAGE_VOICE;
922 }
923 #endif
924 m->mdmreg[REG_SI1I] = si2bit[si];
925 spin_lock_irqsave(&dev->lock, flags);
926 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
927 if (i < 0) {
928 spin_unlock_irqrestore(&dev->lock, flags);
929 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
930 } else {
931 info->isdn_driver = dev->drvmap[i];
932 info->isdn_channel = dev->chanmap[i];
933 info->drv_index = i;
934 dev->m_idx[i] = info->line;
935 dev->usage[i] |= ISDN_USAGE_OUTGOING;
936 info->last_dir = 1;
937 isdn_info_update();
938 spin_unlock_irqrestore(&dev->lock, flags);
939 cmd.driver = info->isdn_driver;
940 cmd.arg = info->isdn_channel;
941 cmd.command = ISDN_CMD_CLREAZ;
942 isdn_command(&cmd);
943 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
944 cmd.driver = info->isdn_driver;
945 cmd.command = ISDN_CMD_SETEAZ;
946 isdn_command(&cmd);
947 cmd.driver = info->isdn_driver;
948 cmd.command = ISDN_CMD_SETL2;
949 info->last_l2 = l2;
950 cmd.arg = info->isdn_channel + (l2 << 8);
951 isdn_command(&cmd);
952 cmd.driver = info->isdn_driver;
953 cmd.command = ISDN_CMD_SETL3;
954 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
955 isdn_command(&cmd);
956 cmd.driver = info->isdn_driver;
957 cmd.arg = info->isdn_channel;
958 cmd.parm.cmsg.Length = l+14;
959 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
960 cmd.parm.cmsg.Subcommand = CAPI_REQ;
961 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
962 cmd.parm.cmsg.para[0] = l+1;
963 strncpy(&cmd.parm.cmsg.para[1], msg, l);
964 cmd.parm.cmsg.para[l+1] = 0xd;
965 cmd.command =CAPI_PUT_MESSAGE;
966 /* info->dialing = 1;
967 strcpy(dev->num[i], n);
968 isdn_info_update();
969 */
970 isdn_command(&cmd);
971 }
972 }
973
974 static inline int
975 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
976 {
977 #ifdef MODEM_PARANOIA_CHECK
978 if (!info) {
979 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
980 name, routine);
981 return 1;
982 }
983 if (info->magic != ISDN_ASYNC_MAGIC) {
984 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
985 name, routine);
986 return 1;
987 }
988 #endif
989 return 0;
990 }
991
992 /*
993 * This routine is called to set the UART divisor registers to match
994 * the specified baud rate for a serial port.
995 */
996 static void
997 isdn_tty_change_speed(modem_info * info)
998 {
999 uint cflag,
1000 cval,
1001 quot;
1002 int i;
1003
1004 if (!info->tty || !info->tty->termios)
1005 return;
1006 cflag = info->tty->termios->c_cflag;
1007
1008 quot = i = cflag & CBAUD;
1009 if (i & CBAUDEX) {
1010 i &= ~CBAUDEX;
1011 if (i < 1 || i > 2)
1012 info->tty->termios->c_cflag &= ~CBAUDEX;
1013 else
1014 i += 15;
1015 }
1016 if (quot) {
1017 info->mcr |= UART_MCR_DTR;
1018 isdn_tty_modem_ncarrier(info);
1019 } else {
1020 info->mcr &= ~UART_MCR_DTR;
1021 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1022 #ifdef ISDN_DEBUG_MODEM_HUP
1023 printk(KERN_DEBUG "Mhup in changespeed\n");
1024 #endif
1025 if (info->online)
1026 info->ncarrier = 1;
1027 isdn_tty_modem_reset_regs(info, 0);
1028 isdn_tty_modem_hup(info, 1);
1029 }
1030 return;
1031 }
1032 /* byte size and parity */
1033 cval = cflag & (CSIZE | CSTOPB);
1034 cval >>= 4;
1035 if (cflag & PARENB)
1036 cval |= UART_LCR_PARITY;
1037 if (!(cflag & PARODD))
1038 cval |= UART_LCR_EPAR;
1039
1040 /* CTS flow control flag and modem status interrupts */
1041 if (cflag & CRTSCTS) {
1042 info->flags |= ISDN_ASYNC_CTS_FLOW;
1043 } else
1044 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1045 if (cflag & CLOCAL)
1046 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1047 else {
1048 info->flags |= ISDN_ASYNC_CHECK_CD;
1049 }
1050 }
1051
1052 static int
1053 isdn_tty_startup(modem_info * info)
1054 {
1055 if (info->flags & ISDN_ASYNC_INITIALIZED)
1056 return 0;
1057 isdn_lock_drivers();
1058 #ifdef ISDN_DEBUG_MODEM_OPEN
1059 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1060 #endif
1061 /*
1062 * Now, initialize the UART
1063 */
1064 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1065 if (info->tty)
1066 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1067 /*
1068 * and set the speed of the serial port
1069 */
1070 isdn_tty_change_speed(info);
1071
1072 info->flags |= ISDN_ASYNC_INITIALIZED;
1073 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1074 info->send_outstanding = 0;
1075 return 0;
1076 }
1077
1078 /*
1079 * This routine will shutdown a serial port; interrupts are disabled, and
1080 * DTR is dropped if the hangup on close termio flag is on.
1081 */
1082 static void
1083 isdn_tty_shutdown(modem_info * info)
1084 {
1085 if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1086 return;
1087 #ifdef ISDN_DEBUG_MODEM_OPEN
1088 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1089 #endif
1090 isdn_unlock_drivers();
1091 info->msr &= ~UART_MSR_RI;
1092 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1093 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1094 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1095 isdn_tty_modem_reset_regs(info, 0);
1096 #ifdef ISDN_DEBUG_MODEM_HUP
1097 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1098 #endif
1099 isdn_tty_modem_hup(info, 1);
1100 }
1101 }
1102 if (info->tty)
1103 set_bit(TTY_IO_ERROR, &info->tty->flags);
1104
1105 info->flags &= ~ISDN_ASYNC_INITIALIZED;
1106 }
1107
1108 /* isdn_tty_write() is the main send-routine. It is called from the upper
1109 * levels within the kernel to perform sending data. Depending on the
1110 * online-flag it either directs output to the at-command-interpreter or
1111 * to the lower level. Additional tasks done here:
1112 * - If online, check for escape-sequence (+++)
1113 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1114 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1115 * - If dialing, abort dial.
1116 */
1117 static int
1118 isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
1119 {
1120 int c;
1121 int total = 0;
1122 modem_info *info = (modem_info *) tty->driver_data;
1123 atemu *m = &info->emu;
1124
1125 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1126 return 0;
1127 /* See isdn_tty_senddown() */
1128 atomic_inc(&info->xmit_lock);
1129 while (1) {
1130 c = count;
1131 if (c > info->xmit_size - info->xmit_count)
1132 c = info->xmit_size - info->xmit_count;
1133 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1134 c = dev->drv[info->isdn_driver]->maxbufsize;
1135 if (c <= 0)
1136 break;
1137 if ((info->online > 1)
1138 #ifdef CONFIG_ISDN_AUDIO
1139 || (info->vonline & 3)
1140 #endif
1141 ) {
1142 #ifdef CONFIG_ISDN_AUDIO
1143 if (!info->vonline)
1144 #endif
1145 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1146 &(m->pluscount),
1147 &(m->lastplus));
1148 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1149 #ifdef CONFIG_ISDN_AUDIO
1150 if (info->vonline) {
1151 int cc = isdn_tty_handleDLEdown(info, m, c);
1152 if (info->vonline & 2) {
1153 if (!cc) {
1154 /* If DLE decoding results in zero-transmit, but
1155 * c originally was non-zero, do a wakeup.
1156 */
1157 tty_wakeup(tty);
1158 info->msr |= UART_MSR_CTS;
1159 info->lsr |= UART_LSR_TEMT;
1160 }
1161 info->xmit_count += cc;
1162 }
1163 if ((info->vonline & 3) == 1) {
1164 /* Do NOT handle Ctrl-Q or Ctrl-S
1165 * when in full-duplex audio mode.
1166 */
1167 if (isdn_tty_end_vrx(buf, c)) {
1168 info->vonline &= ~1;
1169 #ifdef ISDN_DEBUG_MODEM_VOICE
1170 printk(KERN_DEBUG
1171 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1172 info->line);
1173 #endif
1174 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1175 }
1176 }
1177 } else
1178 if (TTY_IS_FCLASS1(info)) {
1179 int cc = isdn_tty_handleDLEdown(info, m, c);
1180
1181 if (info->vonline & 4) { /* ETX seen */
1182 isdn_ctrl c;
1183
1184 c.command = ISDN_CMD_FAXCMD;
1185 c.driver = info->isdn_driver;
1186 c.arg = info->isdn_channel;
1187 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1188 c.parm.aux.subcmd = ETX;
1189 isdn_command(&c);
1190 }
1191 info->vonline = 0;
1192 #ifdef ISDN_DEBUG_MODEM_VOICE
1193 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1194 #endif
1195 info->xmit_count += cc;
1196 } else
1197 #endif
1198 info->xmit_count += c;
1199 } else {
1200 info->msr |= UART_MSR_CTS;
1201 info->lsr |= UART_LSR_TEMT;
1202 if (info->dialing) {
1203 info->dialing = 0;
1204 #ifdef ISDN_DEBUG_MODEM_HUP
1205 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1206 #endif
1207 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1208 isdn_tty_modem_hup(info, 1);
1209 } else
1210 c = isdn_tty_edit_at(buf, c, info);
1211 }
1212 buf += c;
1213 count -= c;
1214 total += c;
1215 }
1216 atomic_dec(&info->xmit_lock);
1217 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1218 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1219 isdn_tty_senddown(info);
1220 isdn_tty_tint(info);
1221 }
1222 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1223 }
1224 return total;
1225 }
1226
1227 static int
1228 isdn_tty_write_room(struct tty_struct *tty)
1229 {
1230 modem_info *info = (modem_info *) tty->driver_data;
1231 int ret;
1232
1233 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1234 return 0;
1235 if (!info->online)
1236 return info->xmit_size;
1237 ret = info->xmit_size - info->xmit_count;
1238 return (ret < 0) ? 0 : ret;
1239 }
1240
1241 static int
1242 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1243 {
1244 modem_info *info = (modem_info *) tty->driver_data;
1245
1246 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1247 return 0;
1248 if (!info->online)
1249 return 0;
1250 return (info->xmit_count);
1251 }
1252
1253 static void
1254 isdn_tty_flush_buffer(struct tty_struct *tty)
1255 {
1256 modem_info *info;
1257
1258 if (!tty) {
1259 return;
1260 }
1261 info = (modem_info *) tty->driver_data;
1262 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1263 return;
1264 }
1265 isdn_tty_cleanup_xmit(info);
1266 info->xmit_count = 0;
1267 tty_wakeup(tty);
1268 }
1269
1270 static void
1271 isdn_tty_flush_chars(struct tty_struct *tty)
1272 {
1273 modem_info *info = (modem_info *) tty->driver_data;
1274
1275 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1276 return;
1277 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1278 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1279 }
1280
1281 /*
1282 * ------------------------------------------------------------
1283 * isdn_tty_throttle()
1284 *
1285 * This routine is called by the upper-layer tty layer to signal that
1286 * incoming characters should be throttled.
1287 * ------------------------------------------------------------
1288 */
1289 static void
1290 isdn_tty_throttle(struct tty_struct *tty)
1291 {
1292 modem_info *info = (modem_info *) tty->driver_data;
1293
1294 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1295 return;
1296 if (I_IXOFF(tty))
1297 info->x_char = STOP_CHAR(tty);
1298 info->mcr &= ~UART_MCR_RTS;
1299 }
1300
1301 static void
1302 isdn_tty_unthrottle(struct tty_struct *tty)
1303 {
1304 modem_info *info = (modem_info *) tty->driver_data;
1305
1306 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1307 return;
1308 if (I_IXOFF(tty)) {
1309 if (info->x_char)
1310 info->x_char = 0;
1311 else
1312 info->x_char = START_CHAR(tty);
1313 }
1314 info->mcr |= UART_MCR_RTS;
1315 }
1316
1317 /*
1318 * ------------------------------------------------------------
1319 * isdn_tty_ioctl() and friends
1320 * ------------------------------------------------------------
1321 */
1322
1323 /*
1324 * isdn_tty_get_lsr_info - get line status register info
1325 *
1326 * Purpose: Let user call ioctl() to get info when the UART physically
1327 * is emptied. On bus types like RS485, the transmitter must
1328 * release the bus after transmitting. This must be done when
1329 * the transmit shift register is empty, not be done when the
1330 * transmit holding register is empty. This functionality
1331 * allows RS485 driver to be written in user space.
1332 */
1333 static int
1334 isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1335 {
1336 u_char status;
1337 uint result;
1338
1339 status = info->lsr;
1340 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1341 return put_user(result, value);
1342 }
1343
1344
1345 static int
1346 isdn_tty_tiocmget(struct tty_struct *tty)
1347 {
1348 modem_info *info = (modem_info *) tty->driver_data;
1349 u_char control, status;
1350
1351 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1352 return -ENODEV;
1353 if (tty->flags & (1 << TTY_IO_ERROR))
1354 return -EIO;
1355
1356 mutex_lock(&modem_info_mutex);
1357 #ifdef ISDN_DEBUG_MODEM_IOCTL
1358 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1359 #endif
1360
1361 control = info->mcr;
1362 status = info->msr;
1363 mutex_unlock(&modem_info_mutex);
1364 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1365 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1366 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1367 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1368 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1369 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1370 }
1371
1372 static int
1373 isdn_tty_tiocmset(struct tty_struct *tty,
1374 unsigned int set, unsigned int clear)
1375 {
1376 modem_info *info = (modem_info *) tty->driver_data;
1377
1378 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1379 return -ENODEV;
1380 if (tty->flags & (1 << TTY_IO_ERROR))
1381 return -EIO;
1382
1383 #ifdef ISDN_DEBUG_MODEM_IOCTL
1384 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1385 #endif
1386
1387 mutex_lock(&modem_info_mutex);
1388 if (set & TIOCM_RTS)
1389 info->mcr |= UART_MCR_RTS;
1390 if (set & TIOCM_DTR) {
1391 info->mcr |= UART_MCR_DTR;
1392 isdn_tty_modem_ncarrier(info);
1393 }
1394
1395 if (clear & TIOCM_RTS)
1396 info->mcr &= ~UART_MCR_RTS;
1397 if (clear & TIOCM_DTR) {
1398 info->mcr &= ~UART_MCR_DTR;
1399 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1400 isdn_tty_modem_reset_regs(info, 0);
1401 #ifdef ISDN_DEBUG_MODEM_HUP
1402 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1403 #endif
1404 if (info->online)
1405 info->ncarrier = 1;
1406 isdn_tty_modem_hup(info, 1);
1407 }
1408 }
1409 mutex_unlock(&modem_info_mutex);
1410 return 0;
1411 }
1412
1413 static int
1414 isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg)
1415 {
1416 modem_info *info = (modem_info *) tty->driver_data;
1417 int retval;
1418
1419 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1420 return -ENODEV;
1421 if (tty->flags & (1 << TTY_IO_ERROR))
1422 return -EIO;
1423 switch (cmd) {
1424 case TCSBRK: /* SVID version: non-zero arg --> no break */
1425 #ifdef ISDN_DEBUG_MODEM_IOCTL
1426 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1427 #endif
1428 retval = tty_check_change(tty);
1429 if (retval)
1430 return retval;
1431 tty_wait_until_sent(tty, 0);
1432 return 0;
1433 case TCSBRKP: /* support for POSIX tcsendbreak() */
1434 #ifdef ISDN_DEBUG_MODEM_IOCTL
1435 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1436 #endif
1437 retval = tty_check_change(tty);
1438 if (retval)
1439 return retval;
1440 tty_wait_until_sent(tty, 0);
1441 return 0;
1442 case TIOCSERGETLSR: /* Get line status register */
1443 #ifdef ISDN_DEBUG_MODEM_IOCTL
1444 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1445 #endif
1446 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1447 default:
1448 #ifdef ISDN_DEBUG_MODEM_IOCTL
1449 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1450 #endif
1451 return -ENOIOCTLCMD;
1452 }
1453 return 0;
1454 }
1455
1456 static void
1457 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1458 {
1459 modem_info *info = (modem_info *) tty->driver_data;
1460
1461 if (!old_termios)
1462 isdn_tty_change_speed(info);
1463 else {
1464 if (tty->termios->c_cflag == old_termios->c_cflag &&
1465 tty->termios->c_ispeed == old_termios->c_ispeed &&
1466 tty->termios->c_ospeed == old_termios->c_ospeed)
1467 return;
1468 isdn_tty_change_speed(info);
1469 if ((old_termios->c_cflag & CRTSCTS) &&
1470 !(tty->termios->c_cflag & CRTSCTS))
1471 tty->hw_stopped = 0;
1472 }
1473 }
1474
1475 /*
1476 * ------------------------------------------------------------
1477 * isdn_tty_open() and friends
1478 * ------------------------------------------------------------
1479 */
1480 static int
1481 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1482 {
1483 DECLARE_WAITQUEUE(wait, NULL);
1484 int do_clocal = 0;
1485 int retval;
1486
1487 /*
1488 * If the device is in the middle of being closed, then block
1489 * until it's done, and then try again.
1490 */
1491 if (tty_hung_up_p(filp) ||
1492 (info->flags & ISDN_ASYNC_CLOSING)) {
1493 if (info->flags & ISDN_ASYNC_CLOSING)
1494 interruptible_sleep_on(&info->close_wait);
1495 #ifdef MODEM_DO_RESTART
1496 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1497 return -EAGAIN;
1498 else
1499 return -ERESTARTSYS;
1500 #else
1501 return -EAGAIN;
1502 #endif
1503 }
1504 /*
1505 * If non-blocking mode is set, then make the check up front
1506 * and then exit.
1507 */
1508 if ((filp->f_flags & O_NONBLOCK) ||
1509 (tty->flags & (1 << TTY_IO_ERROR))) {
1510 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1511 return -EBUSY;
1512 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1513 return 0;
1514 }
1515 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1516 if (info->normal_termios.c_cflag & CLOCAL)
1517 do_clocal = 1;
1518 } else {
1519 if (tty->termios->c_cflag & CLOCAL)
1520 do_clocal = 1;
1521 }
1522 /*
1523 * Block waiting for the carrier detect and the line to become
1524 * free (i.e., not in use by the callout). While we are in
1525 * this loop, info->count is dropped by one, so that
1526 * isdn_tty_close() knows when to free things. We restore it upon
1527 * exit, either normal or abnormal.
1528 */
1529 retval = 0;
1530 add_wait_queue(&info->open_wait, &wait);
1531 #ifdef ISDN_DEBUG_MODEM_OPEN
1532 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1533 info->line, info->count);
1534 #endif
1535 if (!(tty_hung_up_p(filp)))
1536 info->count--;
1537 info->blocked_open++;
1538 while (1) {
1539 set_current_state(TASK_INTERRUPTIBLE);
1540 if (tty_hung_up_p(filp) ||
1541 !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1542 #ifdef MODEM_DO_RESTART
1543 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1544 retval = -EAGAIN;
1545 else
1546 retval = -ERESTARTSYS;
1547 #else
1548 retval = -EAGAIN;
1549 #endif
1550 break;
1551 }
1552 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1553 !(info->flags & ISDN_ASYNC_CLOSING) &&
1554 (do_clocal || (info->msr & UART_MSR_DCD))) {
1555 break;
1556 }
1557 if (signal_pending(current)) {
1558 retval = -ERESTARTSYS;
1559 break;
1560 }
1561 #ifdef ISDN_DEBUG_MODEM_OPEN
1562 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1563 info->line, info->count);
1564 #endif
1565 schedule();
1566 }
1567 current->state = TASK_RUNNING;
1568 remove_wait_queue(&info->open_wait, &wait);
1569 if (!tty_hung_up_p(filp))
1570 info->count++;
1571 info->blocked_open--;
1572 #ifdef ISDN_DEBUG_MODEM_OPEN
1573 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1574 info->line, info->count);
1575 #endif
1576 if (retval)
1577 return retval;
1578 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1579 return 0;
1580 }
1581
1582 /*
1583 * This routine is called whenever a serial port is opened. It
1584 * enables interrupts for a serial port, linking in its async structure into
1585 * the IRQ chain. It also performs the serial-specific
1586 * initialization for the tty structure.
1587 */
1588 static int
1589 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1590 {
1591 modem_info *info;
1592 int retval, line;
1593
1594 line = tty->index;
1595 if (line < 0 || line >= ISDN_MAX_CHANNELS)
1596 return -ENODEV;
1597 info = &dev->mdm.info[line];
1598 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1599 return -ENODEV;
1600 if (!try_module_get(info->owner)) {
1601 printk(KERN_WARNING "%s: cannot reserve module\n", __func__);
1602 return -ENODEV;
1603 }
1604 #ifdef ISDN_DEBUG_MODEM_OPEN
1605 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1606 info->count);
1607 #endif
1608 info->count++;
1609 tty->driver_data = info;
1610 info->tty = tty;
1611 /*
1612 * Start up serial port
1613 */
1614 retval = isdn_tty_startup(info);
1615 if (retval) {
1616 #ifdef ISDN_DEBUG_MODEM_OPEN
1617 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1618 #endif
1619 module_put(info->owner);
1620 return retval;
1621 }
1622 retval = isdn_tty_block_til_ready(tty, filp, info);
1623 if (retval) {
1624 #ifdef ISDN_DEBUG_MODEM_OPEN
1625 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1626 #endif
1627 module_put(info->owner);
1628 return retval;
1629 }
1630 #ifdef ISDN_DEBUG_MODEM_OPEN
1631 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1632 #endif
1633 dev->modempoll++;
1634 #ifdef ISDN_DEBUG_MODEM_OPEN
1635 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1636 #endif
1637 return 0;
1638 }
1639
1640 static void
1641 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1642 {
1643 modem_info *info = (modem_info *) tty->driver_data;
1644 ulong timeout;
1645
1646 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1647 return;
1648 if (tty_hung_up_p(filp)) {
1649 #ifdef ISDN_DEBUG_MODEM_OPEN
1650 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1651 #endif
1652 return;
1653 }
1654 if ((tty->count == 1) && (info->count != 1)) {
1655 /*
1656 * Uh, oh. tty->count is 1, which means that the tty
1657 * structure will be freed. Info->count should always
1658 * be one in these conditions. If it's greater than
1659 * one, we've got real problems, since it means the
1660 * serial port won't be shutdown.
1661 */
1662 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1663 "info->count is %d\n", info->count);
1664 info->count = 1;
1665 }
1666 if (--info->count < 0) {
1667 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1668 info->line, info->count);
1669 info->count = 0;
1670 }
1671 if (info->count) {
1672 #ifdef ISDN_DEBUG_MODEM_OPEN
1673 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1674 #endif
1675 module_put(info->owner);
1676 return;
1677 }
1678 info->flags |= ISDN_ASYNC_CLOSING;
1679 /*
1680 * Save the termios structure, since this port may have
1681 * separate termios for callout and dialin.
1682 */
1683 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1684 info->normal_termios = *tty->termios;
1685 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1686 info->callout_termios = *tty->termios;
1687
1688 tty->closing = 1;
1689 /*
1690 * At this point we stop accepting input. To do this, we
1691 * disable the receive line status interrupts, and tell the
1692 * interrupt driver to stop checking the data ready bit in the
1693 * line status register.
1694 */
1695 if (info->flags & ISDN_ASYNC_INITIALIZED) {
1696 tty_wait_until_sent_from_close(tty, 3000); /* 30 seconds timeout */
1697 /*
1698 * Before we drop DTR, make sure the UART transmitter
1699 * has completely drained; this is especially
1700 * important if there is a transmit FIFO!
1701 */
1702 timeout = jiffies + HZ;
1703 while (!(info->lsr & UART_LSR_TEMT)) {
1704 schedule_timeout_interruptible(20);
1705 if (time_after(jiffies,timeout))
1706 break;
1707 }
1708 }
1709 dev->modempoll--;
1710 isdn_tty_shutdown(info);
1711 isdn_tty_flush_buffer(tty);
1712 tty_ldisc_flush(tty);
1713 info->tty = NULL;
1714 info->ncarrier = 0;
1715 tty->closing = 0;
1716 module_put(info->owner);
1717 if (info->blocked_open) {
1718 msleep_interruptible(500);
1719 wake_up_interruptible(&info->open_wait);
1720 }
1721 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1722 wake_up_interruptible(&info->close_wait);
1723 #ifdef ISDN_DEBUG_MODEM_OPEN
1724 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1725 #endif
1726 }
1727
1728 /*
1729 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1730 */
1731 static void
1732 isdn_tty_hangup(struct tty_struct *tty)
1733 {
1734 modem_info *info = (modem_info *) tty->driver_data;
1735
1736 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1737 return;
1738 isdn_tty_shutdown(info);
1739 info->count = 0;
1740 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1741 info->tty = NULL;
1742 wake_up_interruptible(&info->open_wait);
1743 }
1744
1745 /* This routine initializes all emulator-data.
1746 */
1747 static void
1748 isdn_tty_reset_profile(atemu * m)
1749 {
1750 m->profile[0] = 0;
1751 m->profile[1] = 0;
1752 m->profile[2] = 43;
1753 m->profile[3] = 13;
1754 m->profile[4] = 10;
1755 m->profile[5] = 8;
1756 m->profile[6] = 3;
1757 m->profile[7] = 60;
1758 m->profile[8] = 2;
1759 m->profile[9] = 6;
1760 m->profile[10] = 7;
1761 m->profile[11] = 70;
1762 m->profile[12] = 0x45;
1763 m->profile[13] = 4;
1764 m->profile[14] = ISDN_PROTO_L2_X75I;
1765 m->profile[15] = ISDN_PROTO_L3_TRANS;
1766 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1767 m->profile[17] = ISDN_MODEM_WINSIZE;
1768 m->profile[18] = 4;
1769 m->profile[19] = 0;
1770 m->profile[20] = 0;
1771 m->profile[23] = 0;
1772 m->pmsn[0] = '\0';
1773 m->plmsn[0] = '\0';
1774 }
1775
1776 #ifdef CONFIG_ISDN_AUDIO
1777 static void
1778 isdn_tty_modem_reset_vpar(atemu * m)
1779 {
1780 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1781 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1782 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1783 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1784 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1785 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1786 }
1787 #endif
1788
1789 #ifdef CONFIG_ISDN_TTY_FAX
1790 static void
1791 isdn_tty_modem_reset_faxpar(modem_info * info)
1792 {
1793 T30_s *f = info->fax;
1794
1795 f->code = 0;
1796 f->phase = ISDN_FAX_PHASE_IDLE;
1797 f->direction = 0;
1798 f->resolution = 1; /* fine */
1799 f->rate = 5; /* 14400 bit/s */
1800 f->width = 0;
1801 f->length = 0;
1802 f->compression = 0;
1803 f->ecm = 0;
1804 f->binary = 0;
1805 f->scantime = 0;
1806 memset(&f->id[0], 32, FAXIDLEN - 1);
1807 f->id[FAXIDLEN - 1] = 0;
1808 f->badlin = 0;
1809 f->badmul = 0;
1810 f->bor = 0;
1811 f->nbc = 0;
1812 f->cq = 0;
1813 f->cr = 0;
1814 f->ctcrty = 0;
1815 f->minsp = 0;
1816 f->phcto = 30;
1817 f->rel = 0;
1818 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1819 f->pollid[FAXIDLEN - 1] = 0;
1820 }
1821 #endif
1822
1823 static void
1824 isdn_tty_modem_reset_regs(modem_info * info, int force)
1825 {
1826 atemu *m = &info->emu;
1827 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1828 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1829 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1830 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1831 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1832 }
1833 #ifdef CONFIG_ISDN_AUDIO
1834 isdn_tty_modem_reset_vpar(m);
1835 #endif
1836 #ifdef CONFIG_ISDN_TTY_FAX
1837 isdn_tty_modem_reset_faxpar(info);
1838 #endif
1839 m->mdmcmdl = 0;
1840 }
1841
1842 static void
1843 modem_write_profile(atemu * m)
1844 {
1845 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1846 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1847 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1848 if (dev->profd)
1849 send_sig(SIGIO, dev->profd, 1);
1850 }
1851
1852 static const struct tty_operations modem_ops = {
1853 .open = isdn_tty_open,
1854 .close = isdn_tty_close,
1855 .write = isdn_tty_write,
1856 .flush_chars = isdn_tty_flush_chars,
1857 .write_room = isdn_tty_write_room,
1858 .chars_in_buffer = isdn_tty_chars_in_buffer,
1859 .flush_buffer = isdn_tty_flush_buffer,
1860 .ioctl = isdn_tty_ioctl,
1861 .throttle = isdn_tty_throttle,
1862 .unthrottle = isdn_tty_unthrottle,
1863 .set_termios = isdn_tty_set_termios,
1864 .hangup = isdn_tty_hangup,
1865 .tiocmget = isdn_tty_tiocmget,
1866 .tiocmset = isdn_tty_tiocmset,
1867 };
1868
1869 int
1870 isdn_tty_modem_init(void)
1871 {
1872 isdn_modem_t *m;
1873 int i, retval;
1874 modem_info *info;
1875
1876 m = &dev->mdm;
1877 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1878 if (!m->tty_modem)
1879 return -ENOMEM;
1880 m->tty_modem->name = "ttyI";
1881 m->tty_modem->major = ISDN_TTY_MAJOR;
1882 m->tty_modem->minor_start = 0;
1883 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1884 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1885 m->tty_modem->init_termios = tty_std_termios;
1886 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1887 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1888 m->tty_modem->driver_name = "isdn_tty";
1889 tty_set_operations(m->tty_modem, &modem_ops);
1890 retval = tty_register_driver(m->tty_modem);
1891 if (retval) {
1892 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1893 goto err;
1894 }
1895 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1896 info = &m->info[i];
1897 #ifdef CONFIG_ISDN_TTY_FAX
1898 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1899 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1900 retval = -ENOMEM;
1901 goto err_unregister;
1902 }
1903 #endif
1904 #ifdef MODULE
1905 info->owner = THIS_MODULE;
1906 #endif
1907 spin_lock_init(&info->readlock);
1908 sprintf(info->last_cause, "0000");
1909 sprintf(info->last_num, "none");
1910 info->last_dir = 0;
1911 info->last_lhup = 1;
1912 info->last_l2 = -1;
1913 info->last_si = 0;
1914 isdn_tty_reset_profile(&info->emu);
1915 isdn_tty_modem_reset_regs(info, 1);
1916 info->magic = ISDN_ASYNC_MAGIC;
1917 info->line = i;
1918 info->tty = NULL;
1919 info->x_char = 0;
1920 info->count = 0;
1921 info->blocked_open = 0;
1922 init_waitqueue_head(&info->open_wait);
1923 init_waitqueue_head(&info->close_wait);
1924 info->isdn_driver = -1;
1925 info->isdn_channel = -1;
1926 info->drv_index = -1;
1927 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1928 init_timer(&info->nc_timer);
1929 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1930 info->nc_timer.data = (unsigned long) info;
1931 skb_queue_head_init(&info->xmit_queue);
1932 #ifdef CONFIG_ISDN_AUDIO
1933 skb_queue_head_init(&info->dtmf_queue);
1934 #endif
1935 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1936 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1937 retval = -ENOMEM;
1938 goto err_unregister;
1939 }
1940 /* Make room for T.70 header */
1941 info->xmit_buf += 4;
1942 }
1943 return 0;
1944 err_unregister:
1945 for (i--; i >= 0; i--) {
1946 info = &m->info[i];
1947 #ifdef CONFIG_ISDN_TTY_FAX
1948 kfree(info->fax);
1949 #endif
1950 kfree(info->xmit_buf - 4);
1951 }
1952 tty_unregister_driver(m->tty_modem);
1953 err:
1954 put_tty_driver(m->tty_modem);
1955 m->tty_modem = NULL;
1956 return retval;
1957 }
1958
1959 void
1960 isdn_tty_exit(void)
1961 {
1962 modem_info *info;
1963 int i;
1964
1965 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1966 info = &dev->mdm.info[i];
1967 isdn_tty_cleanup_xmit(info);
1968 #ifdef CONFIG_ISDN_TTY_FAX
1969 kfree(info->fax);
1970 #endif
1971 kfree(info->xmit_buf - 4);
1972 }
1973 tty_unregister_driver(dev->mdm.tty_modem);
1974 put_tty_driver(dev->mdm.tty_modem);
1975 dev->mdm.tty_modem = NULL;
1976 }
1977
1978
1979 /*
1980 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1981 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1982 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1983 */
1984
1985 static int
1986 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1987 {
1988 #ifdef ISDN_DEBUG_MODEM_ICALL
1989 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1990 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1991 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1992 #endif
1993 if (strlen(emu->lmsn)) {
1994 char *p = emu->lmsn;
1995 char *q;
1996 int tmp;
1997 int ret = 0;
1998
1999 while (1) {
2000 if ((q = strchr(p, ';')))
2001 *q = '\0';
2002 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2003 ret = tmp;
2004 #ifdef ISDN_DEBUG_MODEM_ICALL
2005 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2006 p, isdn_map_eaz2msn(emu->msn, di), tmp);
2007 #endif
2008 if (q) {
2009 *q = ';';
2010 p = q;
2011 p++;
2012 }
2013 if (!tmp)
2014 return 0;
2015 if (!q)
2016 break;
2017 }
2018 return ret;
2019 } else {
2020 int tmp;
2021 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2022 #ifdef ISDN_DEBUG_MODEM_ICALL
2023 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2024 isdn_map_eaz2msn(emu->msn, di), tmp);
2025 #endif
2026 return tmp;
2027 }
2028 }
2029
2030 /*
2031 * An incoming call-request has arrived.
2032 * Search the tty-devices for an appropriate device and bind
2033 * it to the ISDN-Channel.
2034 * Return:
2035 *
2036 * 0 = No matching device found.
2037 * 1 = A matching device found.
2038 * 3 = No match found, but eventually would match, if
2039 * CID is longer.
2040 */
2041 int
2042 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2043 {
2044 char *eaz;
2045 int i;
2046 int wret;
2047 int idx;
2048 int si1;
2049 int si2;
2050 char *nr;
2051 ulong flags;
2052
2053 if (!setup->phone[0]) {
2054 nr = "0";
2055 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2056 } else
2057 nr = setup->phone;
2058 si1 = (int) setup->si1;
2059 si2 = (int) setup->si2;
2060 if (!setup->eazmsn[0]) {
2061 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2062 eaz = "0";
2063 } else
2064 eaz = setup->eazmsn;
2065 #ifdef ISDN_DEBUG_MODEM_ICALL
2066 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2067 #endif
2068 wret = 0;
2069 spin_lock_irqsave(&dev->lock, flags);
2070 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2071 modem_info *info = &dev->mdm.info[i];
2072
2073 if (info->count == 0)
2074 continue;
2075 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
2076 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
2077 idx = isdn_dc2minor(di, ch);
2078 #ifdef ISDN_DEBUG_MODEM_ICALL
2079 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2080 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2081 info->flags, info->isdn_driver, info->isdn_channel,
2082 dev->usage[idx]);
2083 #endif
2084 if (
2085 #ifndef FIX_FILE_TRANSFER
2086 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2087 #endif
2088 (info->isdn_driver == -1) &&
2089 (info->isdn_channel == -1) &&
2090 (USG_NONE(dev->usage[idx]))) {
2091 int matchret;
2092
2093 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2094 wret = matchret;
2095 if (!matchret) { /* EAZ is matching */
2096 info->isdn_driver = di;
2097 info->isdn_channel = ch;
2098 info->drv_index = idx;
2099 dev->m_idx[idx] = info->line;
2100 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2101 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2102 strcpy(dev->num[idx], nr);
2103 strcpy(info->emu.cpn, eaz);
2104 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2105 info->emu.mdmreg[REG_PLAN] = setup->plan;
2106 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2107 isdn_info_update();
2108 spin_unlock_irqrestore(&dev->lock, flags);
2109 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2110 info->line);
2111 info->msr |= UART_MSR_RI;
2112 isdn_tty_modem_result(RESULT_RING, info);
2113 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2114 return 1;
2115 }
2116 }
2117 }
2118 }
2119 spin_unlock_irqrestore(&dev->lock, flags);
2120 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2121 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2122 return (wret == 2)?3:0;
2123 }
2124
2125 #define TTY_IS_ACTIVE(info) \
2126 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2127
2128 int
2129 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2130 {
2131 int mi;
2132 modem_info *info;
2133 char *e;
2134
2135 if (i < 0)
2136 return 0;
2137 if ((mi = dev->m_idx[i]) >= 0) {
2138 info = &dev->mdm.info[mi];
2139 switch (c->command) {
2140 case ISDN_STAT_CINF:
2141 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2142 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2143 if (e == (char *)c->parm.num)
2144 info->emu.charge = 0;
2145
2146 break;
2147 case ISDN_STAT_BSENT:
2148 #ifdef ISDN_TTY_STAT_DEBUG
2149 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2150 #endif
2151 if ((info->isdn_driver == c->driver) &&
2152 (info->isdn_channel == c->arg)) {
2153 info->msr |= UART_MSR_CTS;
2154 if (info->send_outstanding)
2155 if (!(--info->send_outstanding))
2156 info->lsr |= UART_LSR_TEMT;
2157 isdn_tty_tint(info);
2158 return 1;
2159 }
2160 break;
2161 case ISDN_STAT_CAUSE:
2162 #ifdef ISDN_TTY_STAT_DEBUG
2163 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2164 #endif
2165 /* Signal cause to tty-device */
2166 strncpy(info->last_cause, c->parm.num, 5);
2167 return 1;
2168 case ISDN_STAT_DISPLAY:
2169 #ifdef ISDN_TTY_STAT_DEBUG
2170 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2171 #endif
2172 /* Signal display to tty-device */
2173 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2174 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2175 isdn_tty_at_cout("\r\n", info);
2176 isdn_tty_at_cout("DISPLAY: ", info);
2177 isdn_tty_at_cout(c->parm.display, info);
2178 isdn_tty_at_cout("\r\n", info);
2179 }
2180 return 1;
2181 case ISDN_STAT_DCONN:
2182 #ifdef ISDN_TTY_STAT_DEBUG
2183 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2184 #endif
2185 if (TTY_IS_ACTIVE(info)) {
2186 if (info->dialing == 1) {
2187 info->dialing = 2;
2188 return 1;
2189 }
2190 }
2191 break;
2192 case ISDN_STAT_DHUP:
2193 #ifdef ISDN_TTY_STAT_DEBUG
2194 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2195 #endif
2196 if (TTY_IS_ACTIVE(info)) {
2197 if (info->dialing == 1)
2198 isdn_tty_modem_result(RESULT_BUSY, info);
2199 if (info->dialing > 1)
2200 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2201 info->dialing = 0;
2202 #ifdef ISDN_DEBUG_MODEM_HUP
2203 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2204 #endif
2205 isdn_tty_modem_hup(info, 0);
2206 return 1;
2207 }
2208 break;
2209 case ISDN_STAT_BCONN:
2210 #ifdef ISDN_TTY_STAT_DEBUG
2211 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2212 #endif
2213 /* Wake up any processes waiting
2214 * for incoming call of this device when
2215 * DCD follow the state of incoming carrier
2216 */
2217 if (info->blocked_open &&
2218 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2219 wake_up_interruptible(&info->open_wait);
2220 }
2221
2222 /* Schedule CONNECT-Message to any tty
2223 * waiting for it and
2224 * set DCD-bit of its modem-status.
2225 */
2226 if (TTY_IS_ACTIVE(info) ||
2227 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2228 info->msr |= UART_MSR_DCD;
2229 info->emu.charge = 0;
2230 if (info->dialing & 0xf)
2231 info->last_dir = 1;
2232 else
2233 info->last_dir = 0;
2234 info->dialing = 0;
2235 info->rcvsched = 1;
2236 if (USG_MODEM(dev->usage[i])) {
2237 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2238 strcpy(info->emu.connmsg, c->parm.num);
2239 isdn_tty_modem_result(RESULT_CONNECT, info);
2240 } else
2241 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2242 }
2243 if (USG_VOICE(dev->usage[i]))
2244 isdn_tty_modem_result(RESULT_VCON, info);
2245 return 1;
2246 }
2247 break;
2248 case ISDN_STAT_BHUP:
2249 #ifdef ISDN_TTY_STAT_DEBUG
2250 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2251 #endif
2252 if (TTY_IS_ACTIVE(info)) {
2253 #ifdef ISDN_DEBUG_MODEM_HUP
2254 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2255 #endif
2256 isdn_tty_modem_hup(info, 0);
2257 return 1;
2258 }
2259 break;
2260 case ISDN_STAT_NODCH:
2261 #ifdef ISDN_TTY_STAT_DEBUG
2262 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2263 #endif
2264 if (TTY_IS_ACTIVE(info)) {
2265 if (info->dialing) {
2266 info->dialing = 0;
2267 info->last_l2 = -1;
2268 info->last_si = 0;
2269 sprintf(info->last_cause, "0000");
2270 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2271 }
2272 isdn_tty_modem_hup(info, 0);
2273 return 1;
2274 }
2275 break;
2276 case ISDN_STAT_UNLOAD:
2277 #ifdef ISDN_TTY_STAT_DEBUG
2278 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2279 #endif
2280 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2281 info = &dev->mdm.info[i];
2282 if (info->isdn_driver == c->driver) {
2283 if (info->online)
2284 isdn_tty_modem_hup(info, 1);
2285 }
2286 }
2287 return 1;
2288 #ifdef CONFIG_ISDN_TTY_FAX
2289 case ISDN_STAT_FAXIND:
2290 if (TTY_IS_ACTIVE(info)) {
2291 isdn_tty_fax_command(info, c);
2292 }
2293 break;
2294 #endif
2295 #ifdef CONFIG_ISDN_AUDIO
2296 case ISDN_STAT_AUDIO:
2297 if (TTY_IS_ACTIVE(info)) {
2298 switch(c->parm.num[0]) {
2299 case ISDN_AUDIO_DTMF:
2300 if (info->vonline) {
2301 isdn_audio_put_dle_code(info,
2302 c->parm.num[1]);
2303 }
2304 break;
2305 }
2306 }
2307 break;
2308 #endif
2309 }
2310 }
2311 return 0;
2312 }
2313
2314 /*********************************************************************
2315 Modem-Emulator-Routines
2316 *********************************************************************/
2317
2318 #define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2319
2320 /*
2321 * Put a message from the AT-emulator into receive-buffer of tty,
2322 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2323 */
2324 void
2325 isdn_tty_at_cout(char *msg, modem_info * info)
2326 {
2327 struct tty_struct *tty;
2328 atemu *m = &info->emu;
2329 char *p;
2330 char c;
2331 u_long flags;
2332 struct sk_buff *skb = NULL;
2333 char *sp = NULL;
2334 int l;
2335
2336 if (!msg) {
2337 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2338 return;
2339 }
2340
2341 l = strlen(msg);
2342
2343 spin_lock_irqsave(&info->readlock, flags);
2344 tty = info->tty;
2345 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2346 spin_unlock_irqrestore(&info->readlock, flags);
2347 return;
2348 }
2349
2350 /* use queue instead of direct, if online and */
2351 /* data is in queue or buffer is full */
2352 if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2353 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2354 skb = alloc_skb(l, GFP_ATOMIC);
2355 if (!skb) {
2356 spin_unlock_irqrestore(&info->readlock, flags);
2357 return;
2358 }
2359 sp = skb_put(skb, l);
2360 #ifdef CONFIG_ISDN_AUDIO
2361 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2362 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2363 #endif
2364 }
2365
2366 for (p = msg; *p; p++) {
2367 switch (*p) {
2368 case '\r':
2369 c = m->mdmreg[REG_CR];
2370 break;
2371 case '\n':
2372 c = m->mdmreg[REG_LF];
2373 break;
2374 case '\b':
2375 c = m->mdmreg[REG_BS];
2376 break;
2377 default:
2378 c = *p;
2379 }
2380 if (skb) {
2381 *sp++ = c;
2382 } else {
2383 if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
2384 break;
2385 }
2386 }
2387 if (skb) {
2388 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2389 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2390 spin_unlock_irqrestore(&info->readlock, flags);
2391 /* Schedule dequeuing */
2392 if (dev->modempoll && info->rcvsched)
2393 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2394
2395 } else {
2396 spin_unlock_irqrestore(&info->readlock, flags);
2397 tty_flip_buffer_push(tty);
2398 }
2399 }
2400
2401 /*
2402 * Perform ATH Hangup
2403 */
2404 static void
2405 isdn_tty_on_hook(modem_info * info)
2406 {
2407 if (info->isdn_channel >= 0) {
2408 #ifdef ISDN_DEBUG_MODEM_HUP
2409 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2410 #endif
2411 isdn_tty_modem_hup(info, 1);
2412 }
2413 }
2414
2415 static void
2416 isdn_tty_off_hook(void)
2417 {
2418 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2419 }
2420
2421 #define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
2422 #define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
2423
2424 /*
2425 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2426 * isdn_tty_modem_escape() if sequence found.
2427 *
2428 * Parameters:
2429 * p pointer to databuffer
2430 * plus escape-character
2431 * count length of buffer
2432 * pluscount count of valid escape-characters so far
2433 * lastplus timestamp of last character
2434 */
2435 static void
2436 isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2437 u_long *lastplus)
2438 {
2439 if (plus > 127)
2440 return;
2441 if (count > 3) {
2442 p += count - 3;
2443 count = 3;
2444 *pluscount = 0;
2445 }
2446 while (count > 0) {
2447 if (*(p++) == plus) {
2448 if ((*pluscount)++) {
2449 /* Time since last '+' > 0.5 sec. ? */
2450 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2451 *pluscount = 1;
2452 } else {
2453 /* Time since last non-'+' < 1.5 sec. ? */
2454 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2455 *pluscount = 0;
2456 }
2457 if ((*pluscount == 3) && (count == 1))
2458 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2459 if (*pluscount > 3)
2460 *pluscount = 1;
2461 } else
2462 *pluscount = 0;
2463 *lastplus = jiffies;
2464 count--;
2465 }
2466 }
2467
2468 /*
2469 * Return result of AT-emulator to tty-receive-buffer, depending on
2470 * modem-register 12, bit 0 and 1.
2471 * For CONNECT-messages also switch to online-mode.
2472 * For RING-message handle auto-ATA if register 0 != 0
2473 */
2474
2475 static void
2476 isdn_tty_modem_result(int code, modem_info * info)
2477 {
2478 atemu *m = &info->emu;
2479 static char *msg[] =
2480 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2481 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2482 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2483 char s[ISDN_MSNLEN+10];
2484
2485 switch (code) {
2486 case RESULT_RING:
2487 m->mdmreg[REG_RINGCNT]++;
2488 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2489 /* Automatically accept incoming call */
2490 isdn_tty_cmd_ATA(info);
2491 break;
2492 case RESULT_NO_CARRIER:
2493 #ifdef ISDN_DEBUG_MODEM_HUP
2494 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2495 (info->flags & ISDN_ASYNC_CLOSING),
2496 (!info->tty));
2497 #endif
2498 m->mdmreg[REG_RINGCNT] = 0;
2499 del_timer(&info->nc_timer);
2500 info->ncarrier = 0;
2501 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2502 return;
2503 }
2504 #ifdef CONFIG_ISDN_AUDIO
2505 if (info->vonline & 1) {
2506 #ifdef ISDN_DEBUG_MODEM_VOICE
2507 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2508 info->line);
2509 #endif
2510 /* voice-recording, add DLE-ETX */
2511 isdn_tty_at_cout("\020\003", info);
2512 }
2513 if (info->vonline & 2) {
2514 #ifdef ISDN_DEBUG_MODEM_VOICE
2515 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2516 info->line);
2517 #endif
2518 /* voice-playing, add DLE-DC4 */
2519 isdn_tty_at_cout("\020\024", info);
2520 }
2521 #endif
2522 break;
2523 case RESULT_CONNECT:
2524 case RESULT_CONNECT64000:
2525 sprintf(info->last_cause, "0000");
2526 if (!info->online)
2527 info->online = 2;
2528 break;
2529 case RESULT_VCON:
2530 #ifdef ISDN_DEBUG_MODEM_VOICE
2531 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2532 info->line);
2533 #endif
2534 sprintf(info->last_cause, "0000");
2535 if (!info->online)
2536 info->online = 1;
2537 break;
2538 } /* switch(code) */
2539
2540 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2541 /* Show results */
2542 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2543 /* Show numeric results only */
2544 sprintf(s, "\r\n%d\r\n", code);
2545 isdn_tty_at_cout(s, info);
2546 } else {
2547 if (code == RESULT_RING) {
2548 /* return if "show RUNG" and ringcounter>1 */
2549 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2550 (m->mdmreg[REG_RINGCNT] > 1))
2551 return;
2552 /* print CID, _before_ _every_ ring */
2553 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2554 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2555 isdn_tty_at_cout(dev->num[info->drv_index], info);
2556 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2557 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2558 isdn_tty_at_cout(info->emu.cpn, info);
2559 }
2560 }
2561 }
2562 isdn_tty_at_cout("\r\n", info);
2563 isdn_tty_at_cout(msg[code], info);
2564 switch (code) {
2565 case RESULT_CONNECT:
2566 switch (m->mdmreg[REG_L2PROT]) {
2567 case ISDN_PROTO_L2_MODEM:
2568 isdn_tty_at_cout(" ", info);
2569 isdn_tty_at_cout(m->connmsg, info);
2570 break;
2571 }
2572 break;
2573 case RESULT_RING:
2574 /* Append CPN, if enabled */
2575 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2576 sprintf(s, "/%s", m->cpn);
2577 isdn_tty_at_cout(s, info);
2578 }
2579 /* Print CID only once, _after_ 1st RING */
2580 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2581 (m->mdmreg[REG_RINGCNT] == 1)) {
2582 isdn_tty_at_cout("\r\n", info);
2583 isdn_tty_at_cout("CALLER NUMBER: ", info);
2584 isdn_tty_at_cout(dev->num[info->drv_index], info);
2585 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2586 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2587 isdn_tty_at_cout(info->emu.cpn, info);
2588 }
2589 }
2590 break;
2591 case RESULT_NO_CARRIER:
2592 case RESULT_NO_DIALTONE:
2593 case RESULT_BUSY:
2594 case RESULT_NO_ANSWER:
2595 m->mdmreg[REG_RINGCNT] = 0;
2596 /* Append Cause-Message if enabled */
2597 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2598 sprintf(s, "/%s", info->last_cause);
2599 isdn_tty_at_cout(s, info);
2600 }
2601 break;
2602 case RESULT_CONNECT64000:
2603 /* Append Protocol to CONNECT message */
2604 switch (m->mdmreg[REG_L2PROT]) {
2605 case ISDN_PROTO_L2_X75I:
2606 case ISDN_PROTO_L2_X75UI:
2607 case ISDN_PROTO_L2_X75BUI:
2608 isdn_tty_at_cout("/X.75", info);
2609 break;
2610 case ISDN_PROTO_L2_HDLC:
2611 isdn_tty_at_cout("/HDLC", info);
2612 break;
2613 case ISDN_PROTO_L2_V11096:
2614 isdn_tty_at_cout("/V110/9600", info);
2615 break;
2616 case ISDN_PROTO_L2_V11019:
2617 isdn_tty_at_cout("/V110/19200", info);
2618 break;
2619 case ISDN_PROTO_L2_V11038:
2620 isdn_tty_at_cout("/V110/38400", info);
2621 break;
2622 }
2623 if (m->mdmreg[REG_T70] & BIT_T70) {
2624 isdn_tty_at_cout("/T.70", info);
2625 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2626 isdn_tty_at_cout("+", info);
2627 }
2628 break;
2629 }
2630 isdn_tty_at_cout("\r\n", info);
2631 }
2632 }
2633 if (code == RESULT_NO_CARRIER) {
2634 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2635 return;
2636 }
2637 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2638 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2639 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2640 tty_hangup(info->tty);
2641 }
2642 }
2643 }
2644
2645
2646 /*
2647 * Display a modem-register-value.
2648 */
2649 static void
2650 isdn_tty_show_profile(int ridx, modem_info * info)
2651 {
2652 char v[6];
2653
2654 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2655 isdn_tty_at_cout(v, info);
2656 }
2657
2658 /*
2659 * Get MSN-string from char-pointer, set pointer to end of number
2660 */
2661 static void
2662 isdn_tty_get_msnstr(char *n, char **p)
2663 {
2664 int limit = ISDN_MSNLEN - 1;
2665
2666 while (((*p[0] >= '0' && *p[0] <= '9') ||
2667 /* Why a comma ??? */
2668 (*p[0] == ',') || (*p[0] == ':')) &&
2669 (limit--))
2670 *n++ = *p[0]++;
2671 *n = '\0';
2672 }
2673
2674 /*
2675 * Get phone-number from modem-commandbuffer
2676 */
2677 static void
2678 isdn_tty_getdial(char *p, char *q,int cnt)
2679 {
2680 int first = 1;
2681 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2682 buffer overflow */
2683
2684 while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) {
2685 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2686 ((*p == 'R') && first) ||
2687 (*p == '*') || (*p == '#')) {
2688 *q++ = *p;
2689 limit--;
2690 }
2691 if(!limit)
2692 break;
2693 p++;
2694 first = 0;
2695 }
2696 *q = 0;
2697 }
2698
2699 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2700 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2701
2702 static void
2703 isdn_tty_report(modem_info * info)
2704 {
2705 atemu *m = &info->emu;
2706 char s[80];
2707
2708 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2709 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2710 isdn_tty_at_cout(s, info);
2711 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2712 isdn_tty_at_cout(s, info);
2713 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2714 switch (info->last_l2) {
2715 case ISDN_PROTO_L2_X75I:
2716 isdn_tty_at_cout("X.75i", info);
2717 break;
2718 case ISDN_PROTO_L2_X75UI:
2719 isdn_tty_at_cout("X.75ui", info);
2720 break;
2721 case ISDN_PROTO_L2_X75BUI:
2722 isdn_tty_at_cout("X.75bui", info);
2723 break;
2724 case ISDN_PROTO_L2_HDLC:
2725 isdn_tty_at_cout("HDLC", info);
2726 break;
2727 case ISDN_PROTO_L2_V11096:
2728 isdn_tty_at_cout("V.110 9600 Baud", info);
2729 break;
2730 case ISDN_PROTO_L2_V11019:
2731 isdn_tty_at_cout("V.110 19200 Baud", info);
2732 break;
2733 case ISDN_PROTO_L2_V11038:
2734 isdn_tty_at_cout("V.110 38400 Baud", info);
2735 break;
2736 case ISDN_PROTO_L2_TRANS:
2737 isdn_tty_at_cout("transparent", info);
2738 break;
2739 case ISDN_PROTO_L2_MODEM:
2740 isdn_tty_at_cout("modem", info);
2741 break;
2742 case ISDN_PROTO_L2_FAX:
2743 isdn_tty_at_cout("fax", info);
2744 break;
2745 default:
2746 isdn_tty_at_cout("unknown", info);
2747 break;
2748 }
2749 if (m->mdmreg[REG_T70] & BIT_T70) {
2750 isdn_tty_at_cout("/T.70", info);
2751 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2752 isdn_tty_at_cout("+", info);
2753 }
2754 isdn_tty_at_cout("\r\n", info);
2755 isdn_tty_at_cout(" Service: ", info);
2756 switch (info->last_si) {
2757 case 1:
2758 isdn_tty_at_cout("audio\r\n", info);
2759 break;
2760 case 5:
2761 isdn_tty_at_cout("btx\r\n", info);
2762 break;
2763 case 7:
2764 isdn_tty_at_cout("data\r\n", info);
2765 break;
2766 default:
2767 sprintf(s, "%d\r\n", info->last_si);
2768 isdn_tty_at_cout(s, info);
2769 break;
2770 }
2771 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2772 isdn_tty_at_cout(s, info);
2773 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2774 isdn_tty_at_cout(s, info);
2775 }
2776
2777 /*
2778 * Parse AT&.. commands.
2779 */
2780 static int
2781 isdn_tty_cmd_ATand(char **p, modem_info * info)
2782 {
2783 atemu *m = &info->emu;
2784 int i;
2785 char rb[100];
2786
2787 #define MAXRB (sizeof(rb) - 1)
2788
2789 switch (*p[0]) {
2790 case 'B':
2791 /* &B - Set Buffersize */
2792 p[0]++;
2793 i = isdn_getnum(p);
2794 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2795 PARSE_ERROR1;
2796 #ifdef CONFIG_ISDN_AUDIO
2797 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2798 PARSE_ERROR1;
2799 #endif
2800 m->mdmreg[REG_PSIZE] = i / 16;
2801 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2802 switch (m->mdmreg[REG_L2PROT]) {
2803 case ISDN_PROTO_L2_V11096:
2804 case ISDN_PROTO_L2_V11019:
2805 case ISDN_PROTO_L2_V11038:
2806 info->xmit_size /= 10;
2807 }
2808 break;
2809 case 'C':
2810 /* &C - DCD Status */
2811 p[0]++;
2812 switch (isdn_getnum(p)) {
2813 case 0:
2814 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2815 break;
2816 case 1:
2817 m->mdmreg[REG_DCD] |= BIT_DCD;
2818 break;
2819 default:
2820 PARSE_ERROR1
2821 }
2822 break;
2823 case 'D':
2824 /* &D - Set DTR-Low-behavior */
2825 p[0]++;
2826 switch (isdn_getnum(p)) {
2827 case 0:
2828 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2829 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2830 break;
2831 case 2:
2832 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2833 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2834 break;
2835 case 3:
2836 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2837 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2838 break;
2839 default:
2840 PARSE_ERROR1
2841 }
2842 break;
2843 case 'E':
2844 /* &E -Set EAZ/MSN */
2845 p[0]++;
2846 isdn_tty_get_msnstr(m->msn, p);
2847 break;
2848 case 'F':
2849 /* &F -Set Factory-Defaults */
2850 p[0]++;
2851 if (info->msr & UART_MSR_DCD)
2852 PARSE_ERROR1;
2853 isdn_tty_reset_profile(m);
2854 isdn_tty_modem_reset_regs(info, 1);
2855 break;
2856 #ifdef DUMMY_HAYES_AT
2857 case 'K':
2858 /* only for be compilant with common scripts */
2859 /* &K Flowcontrol - no function */
2860 p[0]++;
2861 isdn_getnum(p);
2862 break;
2863 #endif
2864 case 'L':
2865 /* &L -Set Numbers to listen on */
2866 p[0]++;
2867 i = 0;
2868 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2869 (i < ISDN_LMSNLEN - 1))
2870 m->lmsn[i++] = *p[0]++;
2871 m->lmsn[i] = '\0';
2872 break;
2873 case 'R':
2874 /* &R - Set V.110 bitrate adaption */
2875 p[0]++;
2876 i = isdn_getnum(p);
2877 switch (i) {
2878 case 0:
2879 /* Switch off V.110, back to X.75 */
2880 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2881 m->mdmreg[REG_SI2] = 0;
2882 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2883 break;
2884 case 9600:
2885 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2886 m->mdmreg[REG_SI2] = 197;
2887 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2888 break;
2889 case 19200:
2890 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2891 m->mdmreg[REG_SI2] = 199;
2892 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2893 break;
2894 case 38400:
2895 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2896 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2897 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2898 break;
2899 default:
2900 PARSE_ERROR1;
2901 }
2902 /* Switch off T.70 */
2903 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2904 /* Set Service 7 */
2905 m->mdmreg[REG_SI1] |= 4;
2906 break;
2907 case 'S':
2908 /* &S - Set Windowsize */
2909 p[0]++;
2910 i = isdn_getnum(p);
2911 if ((i > 0) && (i < 9))
2912 m->mdmreg[REG_WSIZE] = i;
2913 else
2914 PARSE_ERROR1;
2915 break;
2916 case 'V':
2917 /* &V - Show registers */
2918 p[0]++;
2919 isdn_tty_at_cout("\r\n", info);
2920 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2921 sprintf(rb, "S%02d=%03d%s", i,
2922 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2923 isdn_tty_at_cout(rb, info);
2924 }
2925 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2926 strlen(m->msn) ? m->msn : "None");
2927 isdn_tty_at_cout(rb, info);
2928 if (strlen(m->lmsn)) {
2929 isdn_tty_at_cout("\r\nListen: ", info);
2930 isdn_tty_at_cout(m->lmsn, info);
2931 isdn_tty_at_cout("\r\n", info);
2932 }
2933 break;
2934 case 'W':
2935 /* &W - Write Profile */
2936 p[0]++;
2937 switch (*p[0]) {
2938 case '0':
2939 p[0]++;
2940 modem_write_profile(m);
2941 break;
2942 default:
2943 PARSE_ERROR1;
2944 }
2945 break;
2946 case 'X':
2947 /* &X - Switch to BTX-Mode and T.70 */
2948 p[0]++;
2949 switch (isdn_getnum(p)) {
2950 case 0:
2951 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2952 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2953 break;
2954 case 1:
2955 m->mdmreg[REG_T70] |= BIT_T70;
2956 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2957 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2958 info->xmit_size = 112;
2959 m->mdmreg[REG_SI1] = 4;
2960 m->mdmreg[REG_SI2] = 0;
2961 break;
2962 case 2:
2963 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2964 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2965 info->xmit_size = 112;
2966 m->mdmreg[REG_SI1] = 4;
2967 m->mdmreg[REG_SI2] = 0;
2968 break;
2969 default:
2970 PARSE_ERROR1;
2971 }
2972 break;
2973 default:
2974 PARSE_ERROR1;
2975 }
2976 return 0;
2977 }
2978
2979 static int
2980 isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
2981 {
2982 /* Some plausibility checks */
2983 switch (mreg) {
2984 case REG_L2PROT:
2985 if (mval > ISDN_PROTO_L2_MAX)
2986 return 1;
2987 break;
2988 case REG_PSIZE:
2989 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2990 return 1;
2991 #ifdef CONFIG_ISDN_AUDIO
2992 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
2993 return 1;
2994 #endif
2995 info->xmit_size = mval * 16;
2996 switch (m->mdmreg[REG_L2PROT]) {
2997 case ISDN_PROTO_L2_V11096:
2998 case ISDN_PROTO_L2_V11019:
2999 case ISDN_PROTO_L2_V11038:
3000 info->xmit_size /= 10;
3001 }
3002 break;
3003 case REG_SI1I:
3004 case REG_PLAN:
3005 case REG_SCREEN:
3006 /* readonly registers */
3007 return 1;
3008 }
3009 return 0;
3010 }
3011
3012 /*
3013 * Perform ATS command
3014 */
3015 static int
3016 isdn_tty_cmd_ATS(char **p, modem_info * info)
3017 {
3018 atemu *m = &info->emu;
3019 int bitpos;
3020 int mreg;
3021 int mval;
3022 int bval;
3023
3024 mreg = isdn_getnum(p);
3025 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3026 PARSE_ERROR1;
3027 switch (*p[0]) {
3028 case '=':
3029 p[0]++;
3030 mval = isdn_getnum(p);
3031 if (mval < 0 || mval > 255)
3032 PARSE_ERROR1;
3033 if (isdn_tty_check_ats(mreg, mval, info, m))
3034 PARSE_ERROR1;
3035 m->mdmreg[mreg] = mval;
3036 break;
3037 case '.':
3038 /* Set/Clear a single bit */
3039 p[0]++;
3040 bitpos = isdn_getnum(p);
3041 if ((bitpos < 0) || (bitpos > 7))
3042 PARSE_ERROR1;
3043 switch (*p[0]) {
3044 case '=':
3045 p[0]++;
3046 bval = isdn_getnum(p);
3047 if (bval < 0 || bval > 1)
3048 PARSE_ERROR1;
3049 if (bval)
3050 mval = m->mdmreg[mreg] | (1 << bitpos);
3051 else
3052 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3053 if (isdn_tty_check_ats(mreg, mval, info, m))
3054 PARSE_ERROR1;
3055 m->mdmreg[mreg] = mval;
3056 break;
3057 case '?':
3058 p[0]++;
3059 isdn_tty_at_cout("\r\n", info);
3060 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3061 info);
3062 break;
3063 default:
3064 PARSE_ERROR1;
3065 }
3066 break;
3067 case '?':
3068 p[0]++;
3069 isdn_tty_show_profile(mreg, info);
3070 break;
3071 default:
3072 PARSE_ERROR1;
3073 break;
3074 }
3075 return 0;
3076 }
3077
3078 /*
3079 * Perform ATA command
3080 */
3081 static void
3082 isdn_tty_cmd_ATA(modem_info * info)
3083 {
3084 atemu *m = &info->emu;
3085 isdn_ctrl cmd;
3086 int l2;
3087
3088 if (info->msr & UART_MSR_RI) {
3089 /* Accept incoming call */
3090 info->last_dir = 0;
3091 strcpy(info->last_num, dev->num[info->drv_index]);
3092 m->mdmreg[REG_RINGCNT] = 0;
3093 info->msr &= ~UART_MSR_RI;
3094 l2 = m->mdmreg[REG_L2PROT];
3095 #ifdef CONFIG_ISDN_AUDIO
3096 /* If more than one bit set in reg18, autoselect Layer2 */
3097 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3098 if (m->mdmreg[REG_SI1I] == 1) {
3099 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3100 l2 = ISDN_PROTO_L2_TRANS;
3101 } else
3102 l2 = ISDN_PROTO_L2_X75I;
3103 }
3104 #endif
3105 cmd.driver = info->isdn_driver;
3106 cmd.command = ISDN_CMD_SETL2;
3107 cmd.arg = info->isdn_channel + (l2 << 8);
3108 info->last_l2 = l2;
3109 isdn_command(&cmd);
3110 cmd.driver = info->isdn_driver;
3111 cmd.command = ISDN_CMD_SETL3;
3112 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3113 #ifdef CONFIG_ISDN_TTY_FAX
3114 if (l2 == ISDN_PROTO_L2_FAX) {
3115 cmd.parm.fax = info->fax;
3116 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3117 }
3118 #endif
3119 isdn_command(&cmd);
3120 cmd.driver = info->isdn_driver;
3121 cmd.arg = info->isdn_channel;
3122 cmd.command = ISDN_CMD_ACCEPTD;
3123 info->dialing = 16;
3124 info->emu.carrierwait = 0;
3125 isdn_command(&cmd);
3126 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3127 } else
3128 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3129 }
3130
3131 #ifdef CONFIG_ISDN_AUDIO
3132 /*
3133 * Parse AT+F.. commands
3134 */
3135 static int
3136 isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3137 {
3138 atemu *m = &info->emu;
3139 char rs[20];
3140
3141 if (!strncmp(p[0], "CLASS", 5)) {
3142 p[0] += 5;
3143 switch (*p[0]) {
3144 case '?':
3145 p[0]++;
3146 sprintf(rs, "\r\n%d",
3147 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3148 #ifdef CONFIG_ISDN_TTY_FAX
3149 if (TTY_IS_FCLASS2(info))
3150 sprintf(rs, "\r\n2");
3151 else if (TTY_IS_FCLASS1(info))
3152 sprintf(rs, "\r\n1");
3153 #endif
3154 isdn_tty_at_cout(rs, info);
3155 break;
3156 case '=':
3157 p[0]++;
3158 switch (*p[0]) {
3159 case '0':
3160 p[0]++;
3161 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3162 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3163 m->mdmreg[REG_SI1] = 4;
3164 info->xmit_size =
3165 m->mdmreg[REG_PSIZE] * 16;
3166 break;
3167 #ifdef CONFIG_ISDN_TTY_FAX
3168 case '1':
3169 p[0]++;
3170 if (!(dev->global_features &
3171 ISDN_FEATURE_L3_FCLASS1))
3172 PARSE_ERROR1;
3173 m->mdmreg[REG_SI1] = 1;
3174 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3175 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3176 info->xmit_size =
3177 m->mdmreg[REG_PSIZE] * 16;
3178 break;
3179 case '2':
3180 p[0]++;
3181 if (!(dev->global_features &
3182 ISDN_FEATURE_L3_FCLASS2))
3183 PARSE_ERROR1;
3184 m->mdmreg[REG_SI1] = 1;
3185 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3186 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3187 info->xmit_size =
3188 m->mdmreg[REG_PSIZE] * 16;
3189 break;
3190 #endif
3191 case '8':
3192 p[0]++;
3193 /* L2 will change on dialout with si=1 */
3194 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3195 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3196 m->mdmreg[REG_SI1] = 5;
3197 info->xmit_size = VBUF;
3198 break;
3199 case '?':
3200 p[0]++;
3201 strcpy(rs, "\r\n0,");
3202 #ifdef CONFIG_ISDN_TTY_FAX
3203 if (dev->global_features &
3204 ISDN_FEATURE_L3_FCLASS1)
3205 strcat(rs, "1,");
3206 if (dev->global_features &
3207 ISDN_FEATURE_L3_FCLASS2)
3208 strcat(rs, "2,");
3209 #endif
3210 strcat(rs, "8");
3211 isdn_tty_at_cout(rs, info);
3212 break;
3213 default:
3214 PARSE_ERROR1;
3215 }
3216 break;
3217 default:
3218 PARSE_ERROR1;
3219 }
3220 return 0;
3221 }
3222 #ifdef CONFIG_ISDN_TTY_FAX
3223 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3224 #else
3225 PARSE_ERROR1;
3226 #endif
3227 }
3228
3229 /*
3230 * Parse AT+V.. commands
3231 */
3232 static int
3233 isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3234 {
3235 atemu *m = &info->emu;
3236 isdn_ctrl cmd;
3237 static char *vcmd[] =
3238 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3239 int i;
3240 int par1;
3241 int par2;
3242 char rs[20];
3243
3244 i = 0;
3245 while (vcmd[i]) {
3246 if (!strncmp(vcmd[i], p[0], 2)) {
3247 p[0] += 2;
3248 break;
3249 }
3250 i++;
3251 }
3252 switch (i) {
3253 case 0:
3254 /* AT+VNH - Auto hangup feature */
3255 switch (*p[0]) {
3256 case '?':
3257 p[0]++;
3258 isdn_tty_at_cout("\r\n1", info);
3259 break;
3260 case '=':
3261 p[0]++;
3262 switch (*p[0]) {
3263 case '1':
3264 p[0]++;
3265 break;
3266 case '?':
3267 p[0]++;
3268 isdn_tty_at_cout("\r\n1", info);
3269 break;
3270 default:
3271 PARSE_ERROR1;
3272 }
3273 break;
3274 default:
3275 PARSE_ERROR1;
3276 }
3277 break;
3278 case 1:
3279 /* AT+VIP - Reset all voice parameters */
3280 isdn_tty_modem_reset_vpar(m);
3281 break;
3282 case 2:
3283 /* AT+VLS - Select device, accept incoming call */
3284 switch (*p[0]) {
3285 case '?':
3286 p[0]++;
3287 sprintf(rs, "\r\n%d", m->vpar[0]);
3288 isdn_tty_at_cout(rs, info);
3289 break;
3290 case '=':
3291 p[0]++;
3292 switch (*p[0]) {
3293 case '0':
3294 p[0]++;
3295 m->vpar[0] = 0;
3296 break;
3297 case '2':
3298 p[0]++;
3299 m->vpar[0] = 2;
3300 break;
3301 case '?':
3302 p[0]++;
3303 isdn_tty_at_cout("\r\n0,2", info);
3304 break;
3305 default:
3306 PARSE_ERROR1;
3307 }
3308 break;
3309 default:
3310 PARSE_ERROR1;
3311 }
3312 break;
3313 case 3:
3314 /* AT+VRX - Start recording */
3315 if (!m->vpar[0])
3316 PARSE_ERROR1;
3317 if (info->online != 1) {
3318 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3319 return 1;
3320 }
3321 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3322 if (!info->dtmf_state) {
3323 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3324 PARSE_ERROR1;
3325 }
3326 info->silence_state = isdn_audio_silence_init(info->silence_state);
3327 if (!info->silence_state) {
3328 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3329 PARSE_ERROR1;
3330 }
3331 if (m->vpar[3] < 5) {
3332 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3333 if (!info->adpcmr) {
3334 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3335 PARSE_ERROR1;
3336 }
3337 }
3338 #ifdef ISDN_DEBUG_AT
3339 printk(KERN_DEBUG "AT: +VRX\n");
3340 #endif
3341 info->vonline |= 1;
3342 isdn_tty_modem_result(RESULT_CONNECT, info);
3343 return 0;
3344 break;
3345 case 4:
3346 /* AT+VSD - Silence detection */
3347 switch (*p[0]) {
3348 case '?':
3349 p[0]++;
3350 sprintf(rs, "\r\n<%d>,<%d>",
3351 m->vpar[1],
3352 m->vpar[2]);
3353 isdn_tty_at_cout(rs, info);
3354 break;
3355 case '=':
3356 p[0]++;
3357 if ((*p[0]>='0') && (*p[0]<='9')) {
3358 par1 = isdn_getnum(p);
3359 if ((par1 < 0) || (par1 > 31))
3360 PARSE_ERROR1;
3361 if (*p[0] != ',')
3362 PARSE_ERROR1;
3363 p[0]++;
3364 par2 = isdn_getnum(p);
3365 if ((par2 < 0) || (par2 > 255))
3366 PARSE_ERROR1;
3367 m->vpar[1] = par1;
3368 m->vpar[2] = par2;
3369 break;
3370 } else
3371 if (*p[0] == '?') {
3372 p[0]++;
3373 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3374 info);
3375 break;
3376 } else
3377 PARSE_ERROR1;
3378 break;
3379 default:
3380 PARSE_ERROR1;
3381 }
3382 break;
3383 case 5:
3384 /* AT+VSM - Select compression */
3385 switch (*p[0]) {
3386 case '?':
3387 p[0]++;
3388 sprintf(rs, "\r\n<%d>,<%d><8000>",
3389 m->vpar[3],
3390 m->vpar[1]);
3391 isdn_tty_at_cout(rs, info);
3392 break;
3393 case '=':
3394 p[0]++;
3395 switch (*p[0]) {
3396 case '2':
3397 case '3':
3398 case '4':
3399 case '5':
3400 case '6':
3401 par1 = isdn_getnum(p);
3402 if ((par1 < 2) || (par1 > 6))
3403 PARSE_ERROR1;
3404 m->vpar[3] = par1;
3405 break;
3406 case '?':
3407 p[0]++;
3408 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3409 info);
3410 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3411 info);
3412 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3413 info);
3414 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3415 info);
3416 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3417 info);
3418 break;
3419 default:
3420 PARSE_ERROR1;
3421 }
3422 break;
3423 default:
3424 PARSE_ERROR1;
3425 }
3426 break;
3427 case 6:
3428 /* AT+VTX - Start sending */
3429 if (!m->vpar[0])
3430 PARSE_ERROR1;
3431 if (info->online != 1) {
3432 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3433 return 1;
3434 }
3435 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3436 if (!info->dtmf_state) {
3437 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3438 PARSE_ERROR1;
3439 }
3440 if (m->vpar[3] < 5) {
3441 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3442 if (!info->adpcms) {
3443 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3444 PARSE_ERROR1;
3445 }
3446 }
3447 #ifdef ISDN_DEBUG_AT
3448 printk(KERN_DEBUG "AT: +VTX\n");
3449 #endif
3450 m->lastDLE = 0;
3451 info->vonline |= 2;
3452 isdn_tty_modem_result(RESULT_CONNECT, info);
3453 return 0;
3454 break;
3455 case 7:
3456 /* AT+VDD - DTMF detection */
3457 switch (*p[0]) {
3458 case '?':
3459 p[0]++;
3460 sprintf(rs, "\r\n<%d>,<%d>",
3461 m->vpar[4],
3462 m->vpar[5]);
3463 isdn_tty_at_cout(rs, info);
3464 break;
3465 case '=':
3466 p[0]++;
3467 if ((*p[0]>='0') && (*p[0]<='9')) {
3468 if (info->online != 1)
3469 PARSE_ERROR1;
3470 par1 = isdn_getnum(p);
3471 if ((par1 < 0) || (par1 > 15))
3472 PARSE_ERROR1;
3473 if (*p[0] != ',')
3474 PARSE_ERROR1;
3475 p[0]++;
3476 par2 = isdn_getnum(p);
3477 if ((par2 < 0) || (par2 > 255))
3478 PARSE_ERROR1;
3479 m->vpar[4] = par1;
3480 m->vpar[5] = par2;
3481 cmd.driver = info->isdn_driver;
3482 cmd.command = ISDN_CMD_AUDIO;
3483 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3484 cmd.parm.num[0] = par1;
3485 cmd.parm.num[1] = par2;
3486 isdn_command(&cmd);
3487 break;
3488 } else
3489 if (*p[0] == '?') {
3490 p[0]++;
3491 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3492 info);
3493 break;
3494 } else
3495 PARSE_ERROR1;
3496 break;
3497 default:
3498 PARSE_ERROR1;
3499 }
3500 break;
3501 default:
3502 PARSE_ERROR1;
3503 }
3504 return 0;
3505 }
3506 #endif /* CONFIG_ISDN_AUDIO */
3507
3508 /*
3509 * Parse and perform an AT-command-line.
3510 */
3511 static void
3512 isdn_tty_parse_at(modem_info * info)
3513 {
3514 atemu *m = &info->emu;
3515 char *p;
3516 char ds[ISDN_MSNLEN];
3517
3518 #ifdef ISDN_DEBUG_AT
3519 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3520 #endif
3521 for (p = &m->mdmcmd[2]; *p;) {
3522 switch (*p) {
3523 case ' ':
3524 p++;
3525 break;
3526 case 'A':
3527 /* A - Accept incoming call */
3528 p++;
3529 isdn_tty_cmd_ATA(info);
3530 return;
3531 break;
3532 case 'D':
3533 /* D - Dial */
3534 if (info->msr & UART_MSR_DCD)
3535 PARSE_ERROR;
3536 if (info->msr & UART_MSR_RI) {
3537 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3538 return;
3539 }
3540 isdn_tty_getdial(++p, ds, sizeof ds);
3541 p += strlen(p);
3542 if (!strlen(m->msn))
3543 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3544 else if (strlen(ds))
3545 isdn_tty_dial(ds, info, m);
3546 else
3547 PARSE_ERROR;
3548 return;
3549 case 'E':
3550 /* E - Turn Echo on/off */
3551 p++;
3552 switch (isdn_getnum(&p)) {
3553 case 0:
3554 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3555 break;
3556 case 1:
3557 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3558 break;
3559 default:
3560 PARSE_ERROR;
3561 }
3562 break;
3563 case 'H':
3564 /* H - On/Off-hook */
3565 p++;
3566 switch (*p) {
3567 case '0':
3568 p++;
3569 isdn_tty_on_hook(info);
3570 break;
3571 case '1':
3572 p++;
3573 isdn_tty_off_hook();
3574 break;
3575 default:
3576 isdn_tty_on_hook(info);
3577 break;
3578 }
3579 break;
3580 case 'I':
3581 /* I - Information */
3582 p++;
3583 isdn_tty_at_cout("\r\nLinux ISDN", info);
3584 switch (*p) {
3585 case '0':
3586 case '1':
3587 p++;
3588 break;
3589 case '2':
3590 p++;
3591 isdn_tty_report(info);
3592 break;
3593 case '3':
3594 p++;
3595 snprintf(ds, sizeof(ds), "\r\n%d", info->emu.charge);
3596 isdn_tty_at_cout(ds, info);
3597 break;
3598 default:;
3599 }
3600 break;
3601 #ifdef DUMMY_HAYES_AT
3602 case 'L':
3603 case 'M':
3604 /* only for be compilant with common scripts */
3605 /* no function */
3606 p++;
3607 isdn_getnum(&p);
3608 break;
3609 #endif
3610 case 'O':
3611 /* O - Go online */
3612 p++;
3613 if (info->msr & UART_MSR_DCD)
3614 /* if B-Channel is up */
3615 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3616 else
3617 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3618 return;
3619 case 'Q':
3620 /* Q - Turn Emulator messages on/off */
3621 p++;
3622 switch (isdn_getnum(&p)) {
3623 case 0:
3624 m->mdmreg[REG_RESP] |= BIT_RESP;
3625 break;
3626 case 1:
3627 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3628 break;
3629 default:
3630 PARSE_ERROR;
3631 }
3632 break;
3633 case 'S':
3634 /* S - Set/Get Register */
3635 p++;
3636 if (isdn_tty_cmd_ATS(&p, info))
3637 return;
3638 break;
3639 case 'V':
3640 /* V - Numeric or ASCII Emulator-messages */
3641 p++;
3642 switch (isdn_getnum(&p)) {
3643 case 0:
3644 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3645 break;
3646 case 1:
3647 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3648 break;
3649 default:
3650 PARSE_ERROR;
3651 }
3652 break;
3653 case 'Z':
3654 /* Z - Load Registers from Profile */
3655 p++;
3656 if (info->msr & UART_MSR_DCD) {
3657 info->online = 0;
3658 isdn_tty_on_hook(info);
3659 }
3660 isdn_tty_modem_reset_regs(info, 1);
3661 break;
3662 case '+':
3663 p++;
3664 switch (*p) {
3665 #ifdef CONFIG_ISDN_AUDIO
3666 case 'F':
3667 p++;
3668 if (isdn_tty_cmd_PLUSF(&p, info))
3669 return;
3670 break;
3671 case 'V':
3672 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3673 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3674 PARSE_ERROR;
3675 p++;
3676 if (isdn_tty_cmd_PLUSV(&p, info))
3677 return;
3678 break;
3679 #endif /* CONFIG_ISDN_AUDIO */
3680 case 'S': /* SUSPEND */
3681 p++;
3682 isdn_tty_get_msnstr(ds, &p);
3683 isdn_tty_suspend(ds, info, m);
3684 break;
3685 case 'R': /* RESUME */
3686 p++;
3687 isdn_tty_get_msnstr(ds, &p);
3688 isdn_tty_resume(ds, info, m);
3689 break;
3690 case 'M': /* MESSAGE */
3691 p++;
3692 isdn_tty_send_msg(info, m, p);
3693 break;
3694 default:
3695 PARSE_ERROR;
3696 }
3697 break;
3698 case '&':
3699 p++;
3700 if (isdn_tty_cmd_ATand(&p, info))
3701 return;
3702 break;
3703 default:
3704 PARSE_ERROR;
3705 }
3706 }
3707 #ifdef CONFIG_ISDN_AUDIO
3708 if (!info->vonline)
3709 #endif
3710 isdn_tty_modem_result(RESULT_OK, info);
3711 }
3712
3713 /* Need own toupper() because standard-toupper is not available
3714 * within modules.
3715 */
3716 #define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3717
3718 /*
3719 * Perform line-editing of AT-commands
3720 *
3721 * Parameters:
3722 * p inputbuffer
3723 * count length of buffer
3724 * channel index to line (minor-device)
3725 */
3726 static int
3727 isdn_tty_edit_at(const char *p, int count, modem_info * info)
3728 {
3729 atemu *m = &info->emu;
3730 int total = 0;
3731 u_char c;
3732 char eb[2];
3733 int cnt;
3734
3735 for (cnt = count; cnt > 0; p++, cnt--) {
3736 c = *p;
3737 total++;
3738 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3739 /* Separator (CR or LF) */
3740 m->mdmcmd[m->mdmcmdl] = 0;
3741 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3742 eb[0] = c;
3743 eb[1] = 0;
3744 isdn_tty_at_cout(eb, info);
3745 }
3746 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3747 isdn_tty_parse_at(info);
3748 m->mdmcmdl = 0;
3749 continue;
3750 }
3751 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3752 /* Backspace-Function */
3753 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3754 if (m->mdmcmdl)
3755 m->mdmcmdl--;
3756 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3757 isdn_tty_at_cout("\b", info);
3758 }
3759 continue;
3760 }
3761 if (cmdchar(c)) {
3762 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3763 eb[0] = c;
3764 eb[1] = 0;
3765 isdn_tty_at_cout(eb, info);
3766 }
3767 if (m->mdmcmdl < 255) {
3768 c = my_toupper(c);
3769 switch (m->mdmcmdl) {
3770 case 1:
3771 if (c == 'T') {
3772 m->mdmcmd[m->mdmcmdl] = c;
3773 m->mdmcmd[++m->mdmcmdl] = 0;
3774 break;
3775 } else
3776 m->mdmcmdl = 0;
3777 /* Fall through, check for 'A' */
3778 case 0:
3779 if (c == 'A') {
3780 m->mdmcmd[m->mdmcmdl] = c;
3781 m->mdmcmd[++m->mdmcmdl] = 0;
3782 }
3783 break;
3784 default:
3785 m->mdmcmd[m->mdmcmdl] = c;
3786 m->mdmcmd[++m->mdmcmdl] = 0;
3787 }
3788 }
3789 }
3790 }
3791 return total;
3792 }
3793
3794 /*
3795 * Switch all modem-channels who are online and got a valid
3796 * escape-sequence 1.5 seconds ago, to command-mode.
3797 * This function is called every second via timer-interrupt from within
3798 * timer-dispatcher isdn_timer_function()
3799 */
3800 void
3801 isdn_tty_modem_escape(void)
3802 {
3803 int ton = 0;
3804 int i;
3805 int midx;
3806
3807 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3808 if (USG_MODEM(dev->usage[i]))
3809 if ((midx = dev->m_idx[i]) >= 0) {
3810 modem_info *info = &dev->mdm.info[midx];
3811 if (info->online) {
3812 ton = 1;
3813 if ((info->emu.pluscount == 3) &&
3814 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3815 info->emu.pluscount = 0;
3816 info->online = 0;
3817 isdn_tty_modem_result(RESULT_OK, info);
3818 }
3819 }
3820 }
3821 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3822 }
3823
3824 /*
3825 * Put a RING-message to all modem-channels who have the RI-bit set.
3826 * This function is called every second via timer-interrupt from within
3827 * timer-dispatcher isdn_timer_function()
3828 */
3829 void
3830 isdn_tty_modem_ring(void)
3831 {
3832 int ton = 0;
3833 int i;
3834
3835 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3836 modem_info *info = &dev->mdm.info[i];
3837 if (info->msr & UART_MSR_RI) {
3838 ton = 1;
3839 isdn_tty_modem_result(RESULT_RING, info);
3840 }
3841 }
3842 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3843 }
3844
3845 /*
3846 * For all online tty's, try sending data to
3847 * the lower levels.
3848 */
3849 void
3850 isdn_tty_modem_xmit(void)
3851 {
3852 int ton = 1;
3853 int i;
3854
3855 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3856 modem_info *info = &dev->mdm.info[i];
3857 if (info->online) {
3858 ton = 1;
3859 isdn_tty_senddown(info);
3860 isdn_tty_tint(info);
3861 }
3862 }
3863 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3864 }
3865
3866 /*
3867 * Check all channels if we have a 'no carrier' timeout.
3868 * Timeout value is set by Register S7.
3869 */
3870 void
3871 isdn_tty_carrier_timeout(void)
3872 {
3873 int ton = 0;
3874 int i;
3875
3876 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3877 modem_info *info = &dev->mdm.info[i];
3878 if (info->dialing) {
3879 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3880 info->dialing = 0;
3881 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3882 isdn_tty_modem_hup(info, 1);
3883 }
3884 else
3885 ton = 1;
3886 }
3887 }
3888 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3889 }
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