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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / isdn / i4l / isdn_tty.c
blob133eb18e65cca989dcd3f0755ae3d0f98f1c9a47
1 /* $Id: isdn_tty.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
2 *
3 * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
4 *
5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
7 *
8 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 */
12 #undef ISDN_TTY_STAT_DEBUG
13
14 #include <linux/isdn.h>
15 #include <linux/delay.h>
16 #include "isdn_common.h"
17 #include "isdn_tty.h"
18 #ifdef CONFIG_ISDN_AUDIO
19 #include "isdn_audio.h"
20 #define VBUF 0x3e0
21 #define VBUFX (VBUF/16)
22 #endif
23
24 #define FIX_FILE_TRANSFER
25 #define DUMMY_HAYES_AT
26
27 /* Prototypes */
28
29 static int isdn_tty_edit_at(const char *, int, modem_info *);
30 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
31 static void isdn_tty_modem_reset_regs(modem_info *, int);
32 static void isdn_tty_cmd_ATA(modem_info *);
33 static void isdn_tty_flush_buffer(struct tty_struct *);
34 static void isdn_tty_modem_result(int, modem_info *);
35 #ifdef CONFIG_ISDN_AUDIO
36 static int isdn_tty_countDLE(unsigned char *, int);
37 #endif
38
39 /* Leave this unchanged unless you know what you do! */
40 #define MODEM_PARANOIA_CHECK
41 #define MODEM_DO_RESTART
42
43 static int bit2si[8] =
44 {1, 5, 7, 7, 7, 7, 7, 7};
45 static int si2bit[8] =
46 {4, 1, 4, 4, 4, 4, 4, 4};
47
48 char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
49
50
51 /* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
52 * to stuff incoming data directly into a tty's flip-buffer. This
53 * is done to speed up tty-receiving if the receive-queue is empty.
54 * This routine MUST be called with interrupts off.
55 * Return:
56 * 1 = Success
57 * 0 = Failure, data has to be buffered and later processed by
58 * isdn_tty_readmodem().
59 */
60 static int
61 isdn_tty_try_read(modem_info * info, struct sk_buff *skb)
62 {
63 int c;
64 int len;
65 struct tty_struct *tty;
66 char last;
67
68 if (info->online) {
69 if ((tty = info->tty)) {
70 if (info->mcr & UART_MCR_RTS) {
71 len = skb->len
72 #ifdef CONFIG_ISDN_AUDIO
73 + ISDN_AUDIO_SKB_DLECOUNT(skb)
74 #endif
75 ;
76
77 c = tty_buffer_request_room(tty, len);
78 if (c >= len) {
79 #ifdef CONFIG_ISDN_AUDIO
80 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
81 int l = skb->len;
82 unsigned char *dp = skb->data;
83 while (--l) {
84 if (*dp == DLE)
85 tty_insert_flip_char(tty, DLE, 0);
86 tty_insert_flip_char(tty, *dp++, 0);
87 }
88 if (*dp == DLE)
89 tty_insert_flip_char(tty, DLE, 0);
90 last = *dp;
91 } else {
92 #endif
93 if(len > 1)
94 tty_insert_flip_string(tty, skb->data, len - 1);
95 last = skb->data[len - 1];
96 #ifdef CONFIG_ISDN_AUDIO
97 }
98 #endif
99 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
100 tty_insert_flip_char(tty, last, 0xFF);
101 else
102 tty_insert_flip_char(tty, last, TTY_NORMAL);
103 tty_flip_buffer_push(tty);
104 kfree_skb(skb);
105 return 1;
106 }
107 }
108 }
109 }
110 return 0;
111 }
112
113 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
114 * It tries getting received data from the receive queue an stuff it into
115 * the tty's flip-buffer.
116 */
117 void
118 isdn_tty_readmodem(void)
119 {
120 int resched = 0;
121 int midx;
122 int i;
123 int r;
124 struct tty_struct *tty;
125 modem_info *info;
126
127 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
128 if ((midx = dev->m_idx[i]) >= 0) {
129 info = &dev->mdm.info[midx];
130 if (info->online) {
131 r = 0;
132 #ifdef CONFIG_ISDN_AUDIO
133 isdn_audio_eval_dtmf(info);
134 if ((info->vonline & 1) && (info->emu.vpar[1]))
135 isdn_audio_eval_silence(info);
136 #endif
137 if ((tty = info->tty)) {
138 if (info->mcr & UART_MCR_RTS) {
139 /* CISCO AsyncPPP Hack */
140 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
141 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
142 else
143 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
144 if (r)
145 tty_flip_buffer_push(tty);
146 } else
147 r = 1;
148 } else
149 r = 1;
150 if (r) {
151 info->rcvsched = 0;
152 resched = 1;
153 } else
154 info->rcvsched = 1;
155 }
156 }
157 }
158 if (!resched)
159 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
160 }
161
162 int
163 isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
164 {
165 ulong flags;
166 int midx;
167 #ifdef CONFIG_ISDN_AUDIO
168 int ifmt;
169 #endif
170 modem_info *info;
171
172 if ((midx = dev->m_idx[i]) < 0) {
173 /* if midx is invalid, packet is not for tty */
174 return 0;
175 }
176 info = &dev->mdm.info[midx];
177 #ifdef CONFIG_ISDN_AUDIO
178 ifmt = 1;
179
180 if ((info->vonline) && (!info->emu.vpar[4]))
181 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
182 if ((info->vonline & 1) && (info->emu.vpar[1]))
183 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
184 #endif
185 if ((info->online < 2)
186 #ifdef CONFIG_ISDN_AUDIO
187 && (!(info->vonline & 1))
188 #endif
189 ) {
190 /* If Modem not listening, drop data */
191 kfree_skb(skb);
192 return 1;
193 }
194 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
195 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
196 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
197 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
198 skb_pull(skb, 4);
199 else
200 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
201 skb_pull(skb, 2);
202 } else
203 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
204 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
205 skb_pull(skb, 4);
206 }
207 #ifdef CONFIG_ISDN_AUDIO
208 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
209 ISDN_AUDIO_SKB_LOCK(skb) = 0;
210 if (info->vonline & 1) {
211 /* voice conversion/compression */
212 switch (info->emu.vpar[3]) {
213 case 2:
214 case 3:
215 case 4:
216 /* adpcm
217 * Since compressed data takes less
218 * space, we can overwrite the buffer.
219 */
220 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
221 ifmt,
222 skb->data,
223 skb->data,
224 skb->len));
225 break;
226 case 5:
227 /* a-law */
228 if (!ifmt)
229 isdn_audio_ulaw2alaw(skb->data, skb->len);
230 break;
231 case 6:
232 /* u-law */
233 if (ifmt)
234 isdn_audio_alaw2ulaw(skb->data, skb->len);
235 break;
236 }
237 ISDN_AUDIO_SKB_DLECOUNT(skb) =
238 isdn_tty_countDLE(skb->data, skb->len);
239 }
240 #ifdef CONFIG_ISDN_TTY_FAX
241 else {
242 if (info->faxonline & 2) {
243 isdn_tty_fax_bitorder(info, skb);
244 ISDN_AUDIO_SKB_DLECOUNT(skb) =
245 isdn_tty_countDLE(skb->data, skb->len);
246 }
247 }
248 #endif
249 #endif
250 /* Try to deliver directly via tty-buf if queue is empty */
251 spin_lock_irqsave(&info->readlock, flags);
252 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
253 if (isdn_tty_try_read(info, skb)) {
254 spin_unlock_irqrestore(&info->readlock, flags);
255 return 1;
256 }
257 /* Direct deliver failed or queue wasn't empty.
258 * Queue up for later dequeueing via timer-irq.
259 */
260 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
261 dev->drv[di]->rcvcount[channel] +=
262 (skb->len
263 #ifdef CONFIG_ISDN_AUDIO
264 + ISDN_AUDIO_SKB_DLECOUNT(skb)
265 #endif
266 );
267 spin_unlock_irqrestore(&info->readlock, flags);
268 /* Schedule dequeuing */
269 if ((dev->modempoll) && (info->rcvsched))
270 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
271 return 1;
272 }
273
274 static void
275 isdn_tty_cleanup_xmit(modem_info * info)
276 {
277 skb_queue_purge(&info->xmit_queue);
278 #ifdef CONFIG_ISDN_AUDIO
279 skb_queue_purge(&info->dtmf_queue);
280 #endif
281 }
282
283 static void
284 isdn_tty_tint(modem_info * info)
285 {
286 struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
287 int len, slen;
288
289 if (!skb)
290 return;
291 len = skb->len;
292 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
293 info->isdn_channel, 1, skb)) == len) {
294 struct tty_struct *tty = info->tty;
295 info->send_outstanding++;
296 info->msr &= ~UART_MSR_CTS;
297 info->lsr &= ~UART_LSR_TEMT;
298 tty_wakeup(tty);
299 return;
300 }
301 if (slen < 0) {
302 /* Error: no channel, already shutdown, or wrong parameter */
303 dev_kfree_skb(skb);
304 return;
305 }
306 skb_queue_head(&info->xmit_queue, skb);
307 }
308
309 #ifdef CONFIG_ISDN_AUDIO
310 static int
311 isdn_tty_countDLE(unsigned char *buf, int len)
312 {
313 int count = 0;
314
315 while (len--)
316 if (*buf++ == DLE)
317 count++;
318 return count;
319 }
320
321 /* This routine is called from within isdn_tty_write() to perform
322 * DLE-decoding when sending audio-data.
323 */
324 static int
325 isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
326 {
327 unsigned char *p = &info->xmit_buf[info->xmit_count];
328 int count = 0;
329
330 while (len > 0) {
331 if (m->lastDLE) {
332 m->lastDLE = 0;
333 switch (*p) {
334 case DLE:
335 /* Escape code */
336 if (len > 1)
337 memmove(p, p + 1, len - 1);
338 p--;
339 count++;
340 break;
341 case ETX:
342 /* End of data */
343 info->vonline |= 4;
344 return count;
345 case DC4:
346 /* Abort RX */
347 info->vonline &= ~1;
348 #ifdef ISDN_DEBUG_MODEM_VOICE
349 printk(KERN_DEBUG
350 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
351 info->line);
352 #endif
353 isdn_tty_at_cout("\020\003", info);
354 if (!info->vonline) {
355 #ifdef ISDN_DEBUG_MODEM_VOICE
356 printk(KERN_DEBUG
357 "DLEdown: send VCON on ttyI%d\n",
358 info->line);
359 #endif
360 isdn_tty_at_cout("\r\nVCON\r\n", info);
361 }
362 /* Fall through */
363 case 'q':
364 case 's':
365 /* Silence */
366 if (len > 1)
367 memmove(p, p + 1, len - 1);
368 p--;
369 break;
370 }
371 } else {
372 if (*p == DLE)
373 m->lastDLE = 1;
374 else
375 count++;
376 }
377 p++;
378 len--;
379 }
380 if (len < 0) {
381 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
382 return 0;
383 }
384 return count;
385 }
386
387 /* This routine is called from within isdn_tty_write() when receiving
388 * audio-data. It interrupts receiving, if an character other than
389 * ^S or ^Q is sent.
390 */
391 static int
392 isdn_tty_end_vrx(const char *buf, int c)
393 {
394 char ch;
395
396 while (c--) {
397 ch = *buf;
398 if ((ch != 0x11) && (ch != 0x13))
399 return 1;
400 buf++;
401 }
402 return 0;
403 }
404
405 static int voice_cf[7] =
406 {0, 0, 4, 3, 2, 0, 0};
407
408 #endif /* CONFIG_ISDN_AUDIO */
409
410 /* isdn_tty_senddown() is called either directly from within isdn_tty_write()
411 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
412 * outgoing data from the tty's xmit-buffer, handles voice-decompression or
413 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
414 */
415 static void
416 isdn_tty_senddown(modem_info * info)
417 {
418 int buflen;
419 int skb_res;
420 #ifdef CONFIG_ISDN_AUDIO
421 int audio_len;
422 #endif
423 struct sk_buff *skb;
424
425 #ifdef CONFIG_ISDN_AUDIO
426 if (info->vonline & 4) {
427 info->vonline &= ~6;
428 if (!info->vonline) {
429 #ifdef ISDN_DEBUG_MODEM_VOICE
430 printk(KERN_DEBUG
431 "senddown: send VCON on ttyI%d\n",
432 info->line);
433 #endif
434 isdn_tty_at_cout("\r\nVCON\r\n", info);
435 }
436 }
437 #endif
438 if (!(buflen = info->xmit_count))
439 return;
440 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
441 info->msr &= ~UART_MSR_CTS;
442 info->lsr &= ~UART_LSR_TEMT;
443 /* info->xmit_count is modified here and in isdn_tty_write().
444 * So we return here if isdn_tty_write() is in the
445 * critical section.
446 */
447 atomic_inc(&info->xmit_lock);
448 if (!(atomic_dec_and_test(&info->xmit_lock)))
449 return;
450 if (info->isdn_driver < 0) {
451 info->xmit_count = 0;
452 return;
453 }
454 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
455 #ifdef CONFIG_ISDN_AUDIO
456 if (info->vonline & 2)
457 audio_len = buflen * voice_cf[info->emu.vpar[3]];
458 else
459 audio_len = 0;
460 skb = dev_alloc_skb(skb_res + buflen + audio_len);
461 #else
462 skb = dev_alloc_skb(skb_res + buflen);
463 #endif
464 if (!skb) {
465 printk(KERN_WARNING
466 "isdn_tty: Out of memory in ttyI%d senddown\n",
467 info->line);
468 return;
469 }
470 skb_reserve(skb, skb_res);
471 memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
472 info->xmit_count = 0;
473 #ifdef CONFIG_ISDN_AUDIO
474 if (info->vonline & 2) {
475 /* For now, ifmt is fixed to 1 (alaw), since this
476 * is used with ISDN everywhere in the world, except
477 * US, Canada and Japan.
478 * Later, when US-ISDN protocols are implemented,
479 * this setting will depend on the D-channel protocol.
480 */
481 int ifmt = 1;
482
483 /* voice conversion/decompression */
484 switch (info->emu.vpar[3]) {
485 case 2:
486 case 3:
487 case 4:
488 /* adpcm, compatible to ZyXel 1496 modem
489 * with ROM revision 6.01
490 */
491 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
492 ifmt,
493 skb->data,
494 skb_put(skb, audio_len),
495 buflen);
496 skb_pull(skb, buflen);
497 skb_trim(skb, audio_len);
498 break;
499 case 5:
500 /* a-law */
501 if (!ifmt)
502 isdn_audio_alaw2ulaw(skb->data,
503 buflen);
504 break;
505 case 6:
506 /* u-law */
507 if (ifmt)
508 isdn_audio_ulaw2alaw(skb->data,
509 buflen);
510 break;
511 }
512 }
513 #endif /* CONFIG_ISDN_AUDIO */
514 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
515 /* Add T.70 simplified header */
516 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
517 memcpy(skb_push(skb, 2), "\1\0", 2);
518 else
519 memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
520 }
521 skb_queue_tail(&info->xmit_queue, skb);
522 }
523
524 /************************************************************
525 *
526 * Modem-functions
527 *
528 * mostly "stolen" from original Linux-serial.c and friends.
529 *
530 ************************************************************/
531
532 /* The next routine is called once from within timer-interrupt
533 * triggered within isdn_tty_modem_ncarrier(). It calls
534 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
535 * into the tty's buffer.
536 */
537 static void
538 isdn_tty_modem_do_ncarrier(unsigned long data)
539 {
540 modem_info *info = (modem_info *) data;
541 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
542 }
543
544 /* Next routine is called, whenever the DTR-signal is raised.
545 * It checks the ncarrier-flag, and triggers the above routine
546 * when necessary. The ncarrier-flag is set, whenever DTR goes
547 * low.
548 */
549 static void
550 isdn_tty_modem_ncarrier(modem_info * info)
551 {
552 if (info->ncarrier) {
553 info->nc_timer.expires = jiffies + HZ;
554 add_timer(&info->nc_timer);
555 }
556 }
557
558 /*
559 * return the usage calculated by si and layer 2 protocol
560 */
561 static int
562 isdn_calc_usage(int si, int l2)
563 {
564 int usg = ISDN_USAGE_MODEM;
565
566 #ifdef CONFIG_ISDN_AUDIO
567 if (si == 1) {
568 switch(l2) {
569 case ISDN_PROTO_L2_MODEM:
570 usg = ISDN_USAGE_MODEM;
571 break;
572 #ifdef CONFIG_ISDN_TTY_FAX
573 case ISDN_PROTO_L2_FAX:
574 usg = ISDN_USAGE_FAX;
575 break;
576 #endif
577 case ISDN_PROTO_L2_TRANS:
578 default:
579 usg = ISDN_USAGE_VOICE;
580 break;
581 }
582 }
583 #endif
584 return(usg);
585 }
586
587 /* isdn_tty_dial() performs dialing of a tty an the necessary
588 * setup of the lower levels before that.
589 */
590 static void
591 isdn_tty_dial(char *n, modem_info * info, atemu * m)
592 {
593 int usg = ISDN_USAGE_MODEM;
594 int si = 7;
595 int l2 = m->mdmreg[REG_L2PROT];
596 u_long flags;
597 isdn_ctrl cmd;
598 int i;
599 int j;
600
601 for (j = 7; j >= 0; j--)
602 if (m->mdmreg[REG_SI1] & (1 << j)) {
603 si = bit2si[j];
604 break;
605 }
606 usg = isdn_calc_usage(si, l2);
607 #ifdef CONFIG_ISDN_AUDIO
608 if ((si == 1) &&
609 (l2 != ISDN_PROTO_L2_MODEM)
610 #ifdef CONFIG_ISDN_TTY_FAX
611 && (l2 != ISDN_PROTO_L2_FAX)
612 #endif
613 ) {
614 l2 = ISDN_PROTO_L2_TRANS;
615 usg = ISDN_USAGE_VOICE;
616 }
617 #endif
618 m->mdmreg[REG_SI1I] = si2bit[si];
619 spin_lock_irqsave(&dev->lock, flags);
620 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
621 if (i < 0) {
622 spin_unlock_irqrestore(&dev->lock, flags);
623 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
624 } else {
625 info->isdn_driver = dev->drvmap[i];
626 info->isdn_channel = dev->chanmap[i];
627 info->drv_index = i;
628 dev->m_idx[i] = info->line;
629 dev->usage[i] |= ISDN_USAGE_OUTGOING;
630 info->last_dir = 1;
631 strcpy(info->last_num, n);
632 isdn_info_update();
633 spin_unlock_irqrestore(&dev->lock, flags);
634 cmd.driver = info->isdn_driver;
635 cmd.arg = info->isdn_channel;
636 cmd.command = ISDN_CMD_CLREAZ;
637 isdn_command(&cmd);
638 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
639 cmd.driver = info->isdn_driver;
640 cmd.command = ISDN_CMD_SETEAZ;
641 isdn_command(&cmd);
642 cmd.driver = info->isdn_driver;
643 cmd.command = ISDN_CMD_SETL2;
644 info->last_l2 = l2;
645 cmd.arg = info->isdn_channel + (l2 << 8);
646 isdn_command(&cmd);
647 cmd.driver = info->isdn_driver;
648 cmd.command = ISDN_CMD_SETL3;
649 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
650 #ifdef CONFIG_ISDN_TTY_FAX
651 if (l2 == ISDN_PROTO_L2_FAX) {
652 cmd.parm.fax = info->fax;
653 info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
654 }
655 #endif
656 isdn_command(&cmd);
657 cmd.driver = info->isdn_driver;
658 cmd.arg = info->isdn_channel;
659 sprintf(cmd.parm.setup.phone, "%s", n);
660 sprintf(cmd.parm.setup.eazmsn, "%s",
661 isdn_map_eaz2msn(m->msn, info->isdn_driver));
662 cmd.parm.setup.si1 = si;
663 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
664 cmd.command = ISDN_CMD_DIAL;
665 info->dialing = 1;
666 info->emu.carrierwait = 0;
667 strcpy(dev->num[i], n);
668 isdn_info_update();
669 isdn_command(&cmd);
670 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
671 }
672 }
673
674 /* isdn_tty_hangup() disassociates a tty from the real
675 * ISDN-line (hangup). The usage-status is cleared
676 * and some cleanup is done also.
677 */
678 void
679 isdn_tty_modem_hup(modem_info * info, int local)
680 {
681 isdn_ctrl cmd;
682 int di, ch;
683
684 if (!info)
685 return;
686
687 di = info->isdn_driver;
688 ch = info->isdn_channel;
689 if (di < 0 || ch < 0)
690 return;
691
692 info->isdn_driver = -1;
693 info->isdn_channel = -1;
694
695 #ifdef ISDN_DEBUG_MODEM_HUP
696 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
697 #endif
698 info->rcvsched = 0;
699 isdn_tty_flush_buffer(info->tty);
700 if (info->online) {
701 info->last_lhup = local;
702 info->online = 0;
703 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
704 }
705 #ifdef CONFIG_ISDN_AUDIO
706 info->vonline = 0;
707 #ifdef CONFIG_ISDN_TTY_FAX
708 info->faxonline = 0;
709 info->fax->phase = ISDN_FAX_PHASE_IDLE;
710 #endif
711 info->emu.vpar[4] = 0;
712 info->emu.vpar[5] = 8;
713 kfree(info->dtmf_state);
714 info->dtmf_state = NULL;
715 kfree(info->silence_state);
716 info->silence_state = NULL;
717 kfree(info->adpcms);
718 info->adpcms = NULL;
719 kfree(info->adpcmr);
720 info->adpcmr = NULL;
721 #endif
722 if ((info->msr & UART_MSR_RI) &&
723 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
724 isdn_tty_modem_result(RESULT_RUNG, info);
725 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
726 info->lsr |= UART_LSR_TEMT;
727
728 if (local) {
729 cmd.driver = di;
730 cmd.command = ISDN_CMD_HANGUP;
731 cmd.arg = ch;
732 isdn_command(&cmd);
733 }
734
735 isdn_all_eaz(di, ch);
736 info->emu.mdmreg[REG_RINGCNT] = 0;
737 isdn_free_channel(di, ch, 0);
738
739 if (info->drv_index >= 0) {
740 dev->m_idx[info->drv_index] = -1;
741 info->drv_index = -1;
742 }
743 }
744
745 /*
746 * Begin of a CAPI like interface, currently used only for
747 * supplementary service (CAPI 2.0 part III)
748 */
749 #include <linux/isdn/capicmd.h>
750
751 int
752 isdn_tty_capi_facility(capi_msg *cm) {
753 return(-1); /* dummy */
754 }
755
756 /* isdn_tty_suspend() tries to suspend the current tty connection
757 */
758 static void
759 isdn_tty_suspend(char *id, modem_info * info, atemu * m)
760 {
761 isdn_ctrl cmd;
762
763 int l;
764
765 if (!info)
766 return;
767
768 #ifdef ISDN_DEBUG_MODEM_SERVICES
769 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
770 #endif
771 l = strlen(id);
772 if ((info->isdn_driver >= 0)) {
773 cmd.parm.cmsg.Length = l+18;
774 cmd.parm.cmsg.Command = CAPI_FACILITY;
775 cmd.parm.cmsg.Subcommand = CAPI_REQ;
776 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
777 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
778 cmd.parm.cmsg.para[1] = 0;
779 cmd.parm.cmsg.para[2] = l + 3;
780 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
781 cmd.parm.cmsg.para[4] = 0;
782 cmd.parm.cmsg.para[5] = l;
783 strncpy(&cmd.parm.cmsg.para[6], id, l);
784 cmd.command = CAPI_PUT_MESSAGE;
785 cmd.driver = info->isdn_driver;
786 cmd.arg = info->isdn_channel;
787 isdn_command(&cmd);
788 }
789 }
790
791 /* isdn_tty_resume() tries to resume a suspended call
792 * setup of the lower levels before that. unfortunatly here is no
793 * checking for compatibility of used protocols implemented by Q931
794 * It does the same things like isdn_tty_dial, the last command
795 * is different, may be we can merge it.
796 */
797
798 static void
799 isdn_tty_resume(char *id, modem_info * info, atemu * m)
800 {
801 int usg = ISDN_USAGE_MODEM;
802 int si = 7;
803 int l2 = m->mdmreg[REG_L2PROT];
804 isdn_ctrl cmd;
805 ulong flags;
806 int i;
807 int j;
808 int l;
809
810 l = strlen(id);
811 for (j = 7; j >= 0; j--)
812 if (m->mdmreg[REG_SI1] & (1 << j)) {
813 si = bit2si[j];
814 break;
815 }
816 usg = isdn_calc_usage(si, l2);
817 #ifdef CONFIG_ISDN_AUDIO
818 if ((si == 1) &&
819 (l2 != ISDN_PROTO_L2_MODEM)
820 #ifdef CONFIG_ISDN_TTY_FAX
821 && (l2 != ISDN_PROTO_L2_FAX)
822 #endif
823 ) {
824 l2 = ISDN_PROTO_L2_TRANS;
825 usg = ISDN_USAGE_VOICE;
826 }
827 #endif
828 m->mdmreg[REG_SI1I] = si2bit[si];
829 spin_lock_irqsave(&dev->lock, flags);
830 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
831 if (i < 0) {
832 spin_unlock_irqrestore(&dev->lock, flags);
833 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
834 } else {
835 info->isdn_driver = dev->drvmap[i];
836 info->isdn_channel = dev->chanmap[i];
837 info->drv_index = i;
838 dev->m_idx[i] = info->line;
839 dev->usage[i] |= ISDN_USAGE_OUTGOING;
840 info->last_dir = 1;
841 // strcpy(info->last_num, n);
842 isdn_info_update();
843 spin_unlock_irqrestore(&dev->lock, flags);
844 cmd.driver = info->isdn_driver;
845 cmd.arg = info->isdn_channel;
846 cmd.command = ISDN_CMD_CLREAZ;
847 isdn_command(&cmd);
848 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
849 cmd.driver = info->isdn_driver;
850 cmd.command = ISDN_CMD_SETEAZ;
851 isdn_command(&cmd);
852 cmd.driver = info->isdn_driver;
853 cmd.command = ISDN_CMD_SETL2;
854 info->last_l2 = l2;
855 cmd.arg = info->isdn_channel + (l2 << 8);
856 isdn_command(&cmd);
857 cmd.driver = info->isdn_driver;
858 cmd.command = ISDN_CMD_SETL3;
859 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
860 isdn_command(&cmd);
861 cmd.driver = info->isdn_driver;
862 cmd.arg = info->isdn_channel;
863 cmd.parm.cmsg.Length = l+18;
864 cmd.parm.cmsg.Command = CAPI_FACILITY;
865 cmd.parm.cmsg.Subcommand = CAPI_REQ;
866 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
867 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
868 cmd.parm.cmsg.para[1] = 0;
869 cmd.parm.cmsg.para[2] = l+3;
870 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
871 cmd.parm.cmsg.para[4] = 0;
872 cmd.parm.cmsg.para[5] = l;
873 strncpy(&cmd.parm.cmsg.para[6], id, l);
874 cmd.command =CAPI_PUT_MESSAGE;
875 info->dialing = 1;
876 // strcpy(dev->num[i], n);
877 isdn_info_update();
878 isdn_command(&cmd);
879 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
880 }
881 }
882
883 /* isdn_tty_send_msg() sends a message to a HL driver
884 * This is used for hybrid modem cards to send AT commands to it
885 */
886
887 static void
888 isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
889 {
890 int usg = ISDN_USAGE_MODEM;
891 int si = 7;
892 int l2 = m->mdmreg[REG_L2PROT];
893 isdn_ctrl cmd;
894 ulong flags;
895 int i;
896 int j;
897 int l;
898
899 l = strlen(msg);
900 if (!l) {
901 isdn_tty_modem_result(RESULT_ERROR, info);
902 return;
903 }
904 for (j = 7; j >= 0; j--)
905 if (m->mdmreg[REG_SI1] & (1 << j)) {
906 si = bit2si[j];
907 break;
908 }
909 usg = isdn_calc_usage(si, l2);
910 #ifdef CONFIG_ISDN_AUDIO
911 if ((si == 1) &&
912 (l2 != ISDN_PROTO_L2_MODEM)
913 #ifdef CONFIG_ISDN_TTY_FAX
914 && (l2 != ISDN_PROTO_L2_FAX)
915 #endif
916 ) {
917 l2 = ISDN_PROTO_L2_TRANS;
918 usg = ISDN_USAGE_VOICE;
919 }
920 #endif
921 m->mdmreg[REG_SI1I] = si2bit[si];
922 spin_lock_irqsave(&dev->lock, flags);
923 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
924 if (i < 0) {
925 spin_unlock_irqrestore(&dev->lock, flags);
926 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
927 } else {
928 info->isdn_driver = dev->drvmap[i];
929 info->isdn_channel = dev->chanmap[i];
930 info->drv_index = i;
931 dev->m_idx[i] = info->line;
932 dev->usage[i] |= ISDN_USAGE_OUTGOING;
933 info->last_dir = 1;
934 isdn_info_update();
935 spin_unlock_irqrestore(&dev->lock, flags);
936 cmd.driver = info->isdn_driver;
937 cmd.arg = info->isdn_channel;
938 cmd.command = ISDN_CMD_CLREAZ;
939 isdn_command(&cmd);
940 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
941 cmd.driver = info->isdn_driver;
942 cmd.command = ISDN_CMD_SETEAZ;
943 isdn_command(&cmd);
944 cmd.driver = info->isdn_driver;
945 cmd.command = ISDN_CMD_SETL2;
946 info->last_l2 = l2;
947 cmd.arg = info->isdn_channel + (l2 << 8);
948 isdn_command(&cmd);
949 cmd.driver = info->isdn_driver;
950 cmd.command = ISDN_CMD_SETL3;
951 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
952 isdn_command(&cmd);
953 cmd.driver = info->isdn_driver;
954 cmd.arg = info->isdn_channel;
955 cmd.parm.cmsg.Length = l+14;
956 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
957 cmd.parm.cmsg.Subcommand = CAPI_REQ;
958 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
959 cmd.parm.cmsg.para[0] = l+1;
960 strncpy(&cmd.parm.cmsg.para[1], msg, l);
961 cmd.parm.cmsg.para[l+1] = 0xd;
962 cmd.command =CAPI_PUT_MESSAGE;
963 /* info->dialing = 1;
964 strcpy(dev->num[i], n);
965 isdn_info_update();
966 */
967 isdn_command(&cmd);
968 }
969 }
970
971 static inline int
972 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
973 {
974 #ifdef MODEM_PARANOIA_CHECK
975 if (!info) {
976 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
977 name, routine);
978 return 1;
979 }
980 if (info->magic != ISDN_ASYNC_MAGIC) {
981 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
982 name, routine);
983 return 1;
984 }
985 #endif
986 return 0;
987 }
988
989 /*
990 * This routine is called to set the UART divisor registers to match
991 * the specified baud rate for a serial port.
992 */
993 static void
994 isdn_tty_change_speed(modem_info * info)
995 {
996 uint cflag,
997 cval,
998 fcr,
999 quot;
1000 int i;
1001
1002 if (!info->tty || !info->tty->termios)
1003 return;
1004 cflag = info->tty->termios->c_cflag;
1005
1006 quot = i = cflag & CBAUD;
1007 if (i & CBAUDEX) {
1008 i &= ~CBAUDEX;
1009 if (i < 1 || i > 2)
1010 info->tty->termios->c_cflag &= ~CBAUDEX;
1011 else
1012 i += 15;
1013 }
1014 if (quot) {
1015 info->mcr |= UART_MCR_DTR;
1016 isdn_tty_modem_ncarrier(info);
1017 } else {
1018 info->mcr &= ~UART_MCR_DTR;
1019 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1020 #ifdef ISDN_DEBUG_MODEM_HUP
1021 printk(KERN_DEBUG "Mhup in changespeed\n");
1022 #endif
1023 if (info->online)
1024 info->ncarrier = 1;
1025 isdn_tty_modem_reset_regs(info, 0);
1026 isdn_tty_modem_hup(info, 1);
1027 }
1028 return;
1029 }
1030 /* byte size and parity */
1031 cval = cflag & (CSIZE | CSTOPB);
1032 cval >>= 4;
1033 if (cflag & PARENB)
1034 cval |= UART_LCR_PARITY;
1035 if (!(cflag & PARODD))
1036 cval |= UART_LCR_EPAR;
1037 fcr = 0;
1038
1039 /* CTS flow control flag and modem status interrupts */
1040 if (cflag & CRTSCTS) {
1041 info->flags |= ISDN_ASYNC_CTS_FLOW;
1042 } else
1043 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1044 if (cflag & CLOCAL)
1045 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1046 else {
1047 info->flags |= ISDN_ASYNC_CHECK_CD;
1048 }
1049 }
1050
1051 static int
1052 isdn_tty_startup(modem_info * info)
1053 {
1054 if (info->flags & ISDN_ASYNC_INITIALIZED)
1055 return 0;
1056 isdn_lock_drivers();
1057 #ifdef ISDN_DEBUG_MODEM_OPEN
1058 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1059 #endif
1060 /*
1061 * Now, initialize the UART
1062 */
1063 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1064 if (info->tty)
1065 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1066 /*
1067 * and set the speed of the serial port
1068 */
1069 isdn_tty_change_speed(info);
1070
1071 info->flags |= ISDN_ASYNC_INITIALIZED;
1072 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1073 info->send_outstanding = 0;
1074 return 0;
1075 }
1076
1077 /*
1078 * This routine will shutdown a serial port; interrupts are disabled, and
1079 * DTR is dropped if the hangup on close termio flag is on.
1080 */
1081 static void
1082 isdn_tty_shutdown(modem_info * info)
1083 {
1084 if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1085 return;
1086 #ifdef ISDN_DEBUG_MODEM_OPEN
1087 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1088 #endif
1089 isdn_unlock_drivers();
1090 info->msr &= ~UART_MSR_RI;
1091 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1092 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1093 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1094 isdn_tty_modem_reset_regs(info, 0);
1095 #ifdef ISDN_DEBUG_MODEM_HUP
1096 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1097 #endif
1098 isdn_tty_modem_hup(info, 1);
1099 }
1100 }
1101 if (info->tty)
1102 set_bit(TTY_IO_ERROR, &info->tty->flags);
1103
1104 info->flags &= ~ISDN_ASYNC_INITIALIZED;
1105 }
1106
1107 /* isdn_tty_write() is the main send-routine. It is called from the upper
1108 * levels within the kernel to perform sending data. Depending on the
1109 * online-flag it either directs output to the at-command-interpreter or
1110 * to the lower level. Additional tasks done here:
1111 * - If online, check for escape-sequence (+++)
1112 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1113 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1114 * - If dialing, abort dial.
1115 */
1116 static int
1117 isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
1118 {
1119 int c;
1120 int total = 0;
1121 modem_info *info = (modem_info *) tty->driver_data;
1122 atemu *m = &info->emu;
1123
1124 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1125 return 0;
1126 /* See isdn_tty_senddown() */
1127 atomic_inc(&info->xmit_lock);
1128 while (1) {
1129 c = count;
1130 if (c > info->xmit_size - info->xmit_count)
1131 c = info->xmit_size - info->xmit_count;
1132 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1133 c = dev->drv[info->isdn_driver]->maxbufsize;
1134 if (c <= 0)
1135 break;
1136 if ((info->online > 1)
1137 #ifdef CONFIG_ISDN_AUDIO
1138 || (info->vonline & 3)
1139 #endif
1140 ) {
1141 #ifdef CONFIG_ISDN_AUDIO
1142 if (!info->vonline)
1143 #endif
1144 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1145 &(m->pluscount),
1146 &(m->lastplus));
1147 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1148 #ifdef CONFIG_ISDN_AUDIO
1149 if (info->vonline) {
1150 int cc = isdn_tty_handleDLEdown(info, m, c);
1151 if (info->vonline & 2) {
1152 if (!cc) {
1153 /* If DLE decoding results in zero-transmit, but
1154 * c originally was non-zero, do a wakeup.
1155 */
1156 tty_wakeup(tty);
1157 info->msr |= UART_MSR_CTS;
1158 info->lsr |= UART_LSR_TEMT;
1159 }
1160 info->xmit_count += cc;
1161 }
1162 if ((info->vonline & 3) == 1) {
1163 /* Do NOT handle Ctrl-Q or Ctrl-S
1164 * when in full-duplex audio mode.
1165 */
1166 if (isdn_tty_end_vrx(buf, c)) {
1167 info->vonline &= ~1;
1168 #ifdef ISDN_DEBUG_MODEM_VOICE
1169 printk(KERN_DEBUG
1170 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1171 info->line);
1172 #endif
1173 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1174 }
1175 }
1176 } else
1177 if (TTY_IS_FCLASS1(info)) {
1178 int cc = isdn_tty_handleDLEdown(info, m, c);
1179
1180 if (info->vonline & 4) { /* ETX seen */
1181 isdn_ctrl c;
1182
1183 c.command = ISDN_CMD_FAXCMD;
1184 c.driver = info->isdn_driver;
1185 c.arg = info->isdn_channel;
1186 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1187 c.parm.aux.subcmd = ETX;
1188 isdn_command(&c);
1189 }
1190 info->vonline = 0;
1191 #ifdef ISDN_DEBUG_MODEM_VOICE
1192 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1193 #endif
1194 info->xmit_count += cc;
1195 } else
1196 #endif
1197 info->xmit_count += c;
1198 } else {
1199 info->msr |= UART_MSR_CTS;
1200 info->lsr |= UART_LSR_TEMT;
1201 if (info->dialing) {
1202 info->dialing = 0;
1203 #ifdef ISDN_DEBUG_MODEM_HUP
1204 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1205 #endif
1206 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1207 isdn_tty_modem_hup(info, 1);
1208 } else
1209 c = isdn_tty_edit_at(buf, c, info);
1210 }
1211 buf += c;
1212 count -= c;
1213 total += c;
1214 }
1215 atomic_dec(&info->xmit_lock);
1216 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1217 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1218 isdn_tty_senddown(info);
1219 isdn_tty_tint(info);
1220 }
1221 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1222 }
1223 return total;
1224 }
1225
1226 static int
1227 isdn_tty_write_room(struct tty_struct *tty)
1228 {
1229 modem_info *info = (modem_info *) tty->driver_data;
1230 int ret;
1231
1232 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1233 return 0;
1234 if (!info->online)
1235 return info->xmit_size;
1236 ret = info->xmit_size - info->xmit_count;
1237 return (ret < 0) ? 0 : ret;
1238 }
1239
1240 static int
1241 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1242 {
1243 modem_info *info = (modem_info *) tty->driver_data;
1244
1245 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1246 return 0;
1247 if (!info->online)
1248 return 0;
1249 return (info->xmit_count);
1250 }
1251
1252 static void
1253 isdn_tty_flush_buffer(struct tty_struct *tty)
1254 {
1255 modem_info *info;
1256
1257 if (!tty) {
1258 return;
1259 }
1260 info = (modem_info *) tty->driver_data;
1261 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1262 return;
1263 }
1264 isdn_tty_cleanup_xmit(info);
1265 info->xmit_count = 0;
1266 tty_wakeup(tty);
1267 }
1268
1269 static void
1270 isdn_tty_flush_chars(struct tty_struct *tty)
1271 {
1272 modem_info *info = (modem_info *) tty->driver_data;
1273
1274 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1275 return;
1276 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1277 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1278 }
1279
1280 /*
1281 * ------------------------------------------------------------
1282 * isdn_tty_throttle()
1283 *
1284 * This routine is called by the upper-layer tty layer to signal that
1285 * incoming characters should be throttled.
1286 * ------------------------------------------------------------
1287 */
1288 static void
1289 isdn_tty_throttle(struct tty_struct *tty)
1290 {
1291 modem_info *info = (modem_info *) tty->driver_data;
1292
1293 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1294 return;
1295 if (I_IXOFF(tty))
1296 info->x_char = STOP_CHAR(tty);
1297 info->mcr &= ~UART_MCR_RTS;
1298 }
1299
1300 static void
1301 isdn_tty_unthrottle(struct tty_struct *tty)
1302 {
1303 modem_info *info = (modem_info *) tty->driver_data;
1304
1305 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1306 return;
1307 if (I_IXOFF(tty)) {
1308 if (info->x_char)
1309 info->x_char = 0;
1310 else
1311 info->x_char = START_CHAR(tty);
1312 }
1313 info->mcr |= UART_MCR_RTS;
1314 }
1315
1316 /*
1317 * ------------------------------------------------------------
1318 * isdn_tty_ioctl() and friends
1319 * ------------------------------------------------------------
1320 */
1321
1322 /*
1323 * isdn_tty_get_lsr_info - get line status register info
1324 *
1325 * Purpose: Let user call ioctl() to get info when the UART physically
1326 * is emptied. On bus types like RS485, the transmitter must
1327 * release the bus after transmitting. This must be done when
1328 * the transmit shift register is empty, not be done when the
1329 * transmit holding register is empty. This functionality
1330 * allows RS485 driver to be written in user space.
1331 */
1332 static int
1333 isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1334 {
1335 u_char status;
1336 uint result;
1337
1338 status = info->lsr;
1339 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1340 return put_user(result, value);
1341 }
1342
1343
1344 static int
1345 isdn_tty_tiocmget(struct tty_struct *tty, struct file *file)
1346 {
1347 modem_info *info = (modem_info *) tty->driver_data;
1348 u_char control, status;
1349
1350 if (isdn_tty_paranoia_check(info, tty->name, __FUNCTION__))
1351 return -ENODEV;
1352 if (tty->flags & (1 << TTY_IO_ERROR))
1353 return -EIO;
1354
1355 #ifdef ISDN_DEBUG_MODEM_IOCTL
1356 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1357 #endif
1358
1359 control = info->mcr;
1360 status = info->msr;
1361 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1362 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1363 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1364 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1365 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1366 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1367 }
1368
1369 static int
1370 isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
1371 unsigned int set, unsigned int clear)
1372 {
1373 modem_info *info = (modem_info *) tty->driver_data;
1374
1375 if (isdn_tty_paranoia_check(info, tty->name, __FUNCTION__))
1376 return -ENODEV;
1377 if (tty->flags & (1 << TTY_IO_ERROR))
1378 return -EIO;
1379
1380 #ifdef ISDN_DEBUG_MODEM_IOCTL
1381 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1382 #endif
1383
1384 if (set & TIOCM_RTS)
1385 info->mcr |= UART_MCR_RTS;
1386 if (set & TIOCM_DTR) {
1387 info->mcr |= UART_MCR_DTR;
1388 isdn_tty_modem_ncarrier(info);
1389 }
1390
1391 if (clear & TIOCM_RTS)
1392 info->mcr &= ~UART_MCR_RTS;
1393 if (clear & TIOCM_DTR) {
1394 info->mcr &= ~UART_MCR_DTR;
1395 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1396 isdn_tty_modem_reset_regs(info, 0);
1397 #ifdef ISDN_DEBUG_MODEM_HUP
1398 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1399 #endif
1400 if (info->online)
1401 info->ncarrier = 1;
1402 isdn_tty_modem_hup(info, 1);
1403 }
1404 }
1405 return 0;
1406 }
1407
1408 static int
1409 isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
1410 uint cmd, ulong arg)
1411 {
1412 modem_info *info = (modem_info *) tty->driver_data;
1413 int retval;
1414
1415 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1416 return -ENODEV;
1417 if (tty->flags & (1 << TTY_IO_ERROR))
1418 return -EIO;
1419 switch (cmd) {
1420 case TCSBRK: /* SVID version: non-zero arg --> no break */
1421 #ifdef ISDN_DEBUG_MODEM_IOCTL
1422 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1423 #endif
1424 retval = tty_check_change(tty);
1425 if (retval)
1426 return retval;
1427 tty_wait_until_sent(tty, 0);
1428 return 0;
1429 case TCSBRKP: /* support for POSIX tcsendbreak() */
1430 #ifdef ISDN_DEBUG_MODEM_IOCTL
1431 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1432 #endif
1433 retval = tty_check_change(tty);
1434 if (retval)
1435 return retval;
1436 tty_wait_until_sent(tty, 0);
1437 return 0;
1438 case TIOCGSOFTCAR:
1439 #ifdef ISDN_DEBUG_MODEM_IOCTL
1440 printk(KERN_DEBUG "ttyI%d ioctl TIOCGSOFTCAR\n", info->line);
1441 #endif
1442 return put_user(C_CLOCAL(tty) ? 1 : 0, (ulong __user *) arg);
1443 case TIOCSSOFTCAR:
1444 #ifdef ISDN_DEBUG_MODEM_IOCTL
1445 printk(KERN_DEBUG "ttyI%d ioctl TIOCSSOFTCAR\n", info->line);
1446 #endif
1447 if (get_user(arg, (ulong __user *) arg))
1448 return -EFAULT;
1449 tty->termios->c_cflag =
1450 ((tty->termios->c_cflag & ~CLOCAL) |
1451 (arg ? CLOCAL : 0));
1452 return 0;
1453 case TIOCSERGETLSR: /* Get line status register */
1454 #ifdef ISDN_DEBUG_MODEM_IOCTL
1455 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1456 #endif
1457 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1458 default:
1459 #ifdef ISDN_DEBUG_MODEM_IOCTL
1460 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1461 #endif
1462 return -ENOIOCTLCMD;
1463 }
1464 return 0;
1465 }
1466
1467 static void
1468 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1469 {
1470 modem_info *info = (modem_info *) tty->driver_data;
1471
1472 if (!old_termios)
1473 isdn_tty_change_speed(info);
1474 else {
1475 if (tty->termios->c_cflag == old_termios->c_cflag)
1476 return;
1477 isdn_tty_change_speed(info);
1478 if ((old_termios->c_cflag & CRTSCTS) &&
1479 !(tty->termios->c_cflag & CRTSCTS)) {
1480 tty->hw_stopped = 0;
1481 }
1482 }
1483 }
1484
1485 /*
1486 * ------------------------------------------------------------
1487 * isdn_tty_open() and friends
1488 * ------------------------------------------------------------
1489 */
1490 static int
1491 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1492 {
1493 DECLARE_WAITQUEUE(wait, NULL);
1494 int do_clocal = 0;
1495 int retval;
1496
1497 /*
1498 * If the device is in the middle of being closed, then block
1499 * until it's done, and then try again.
1500 */
1501 if (tty_hung_up_p(filp) ||
1502 (info->flags & ISDN_ASYNC_CLOSING)) {
1503 if (info->flags & ISDN_ASYNC_CLOSING)
1504 interruptible_sleep_on(&info->close_wait);
1505 #ifdef MODEM_DO_RESTART
1506 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1507 return -EAGAIN;
1508 else
1509 return -ERESTARTSYS;
1510 #else
1511 return -EAGAIN;
1512 #endif
1513 }
1514 /*
1515 * If non-blocking mode is set, then make the check up front
1516 * and then exit.
1517 */
1518 if ((filp->f_flags & O_NONBLOCK) ||
1519 (tty->flags & (1 << TTY_IO_ERROR))) {
1520 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1521 return -EBUSY;
1522 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1523 return 0;
1524 }
1525 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1526 if (info->normal_termios.c_cflag & CLOCAL)
1527 do_clocal = 1;
1528 } else {
1529 if (tty->termios->c_cflag & CLOCAL)
1530 do_clocal = 1;
1531 }
1532 /*
1533 * Block waiting for the carrier detect and the line to become
1534 * free (i.e., not in use by the callout). While we are in
1535 * this loop, info->count is dropped by one, so that
1536 * isdn_tty_close() knows when to free things. We restore it upon
1537 * exit, either normal or abnormal.
1538 */
1539 retval = 0;
1540 add_wait_queue(&info->open_wait, &wait);
1541 #ifdef ISDN_DEBUG_MODEM_OPEN
1542 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1543 info->line, info->count);
1544 #endif
1545 if (!(tty_hung_up_p(filp)))
1546 info->count--;
1547 info->blocked_open++;
1548 while (1) {
1549 set_current_state(TASK_INTERRUPTIBLE);
1550 if (tty_hung_up_p(filp) ||
1551 !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1552 #ifdef MODEM_DO_RESTART
1553 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1554 retval = -EAGAIN;
1555 else
1556 retval = -ERESTARTSYS;
1557 #else
1558 retval = -EAGAIN;
1559 #endif
1560 break;
1561 }
1562 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1563 !(info->flags & ISDN_ASYNC_CLOSING) &&
1564 (do_clocal || (info->msr & UART_MSR_DCD))) {
1565 break;
1566 }
1567 if (signal_pending(current)) {
1568 retval = -ERESTARTSYS;
1569 break;
1570 }
1571 #ifdef ISDN_DEBUG_MODEM_OPEN
1572 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1573 info->line, info->count);
1574 #endif
1575 schedule();
1576 }
1577 current->state = TASK_RUNNING;
1578 remove_wait_queue(&info->open_wait, &wait);
1579 if (!tty_hung_up_p(filp))
1580 info->count++;
1581 info->blocked_open--;
1582 #ifdef ISDN_DEBUG_MODEM_OPEN
1583 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1584 info->line, info->count);
1585 #endif
1586 if (retval)
1587 return retval;
1588 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1589 return 0;
1590 }
1591
1592 /*
1593 * This routine is called whenever a serial port is opened. It
1594 * enables interrupts for a serial port, linking in its async structure into
1595 * the IRQ chain. It also performs the serial-specific
1596 * initialization for the tty structure.
1597 */
1598 static int
1599 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1600 {
1601 modem_info *info;
1602 int retval, line;
1603
1604 line = tty->index;
1605 if (line < 0 || line > ISDN_MAX_CHANNELS)
1606 return -ENODEV;
1607 info = &dev->mdm.info[line];
1608 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1609 return -ENODEV;
1610 if (!try_module_get(info->owner)) {
1611 printk(KERN_WARNING "%s: cannot reserve module\n", __FUNCTION__);
1612 return -ENODEV;
1613 }
1614 #ifdef ISDN_DEBUG_MODEM_OPEN
1615 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1616 info->count);
1617 #endif
1618 info->count++;
1619 tty->driver_data = info;
1620 info->tty = tty;
1621 /*
1622 * Start up serial port
1623 */
1624 retval = isdn_tty_startup(info);
1625 if (retval) {
1626 #ifdef ISDN_DEBUG_MODEM_OPEN
1627 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1628 #endif
1629 module_put(info->owner);
1630 return retval;
1631 }
1632 retval = isdn_tty_block_til_ready(tty, filp, info);
1633 if (retval) {
1634 #ifdef ISDN_DEBUG_MODEM_OPEN
1635 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1636 #endif
1637 module_put(info->owner);
1638 return retval;
1639 }
1640 #ifdef ISDN_DEBUG_MODEM_OPEN
1641 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1642 #endif
1643 dev->modempoll++;
1644 #ifdef ISDN_DEBUG_MODEM_OPEN
1645 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1646 #endif
1647 return 0;
1648 }
1649
1650 static void
1651 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1652 {
1653 modem_info *info = (modem_info *) tty->driver_data;
1654 ulong timeout;
1655
1656 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1657 return;
1658 if (tty_hung_up_p(filp)) {
1659 #ifdef ISDN_DEBUG_MODEM_OPEN
1660 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1661 #endif
1662 return;
1663 }
1664 if ((tty->count == 1) && (info->count != 1)) {
1665 /*
1666 * Uh, oh. tty->count is 1, which means that the tty
1667 * structure will be freed. Info->count should always
1668 * be one in these conditions. If it's greater than
1669 * one, we've got real problems, since it means the
1670 * serial port won't be shutdown.
1671 */
1672 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1673 "info->count is %d\n", info->count);
1674 info->count = 1;
1675 }
1676 if (--info->count < 0) {
1677 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1678 info->line, info->count);
1679 info->count = 0;
1680 }
1681 if (info->count) {
1682 #ifdef ISDN_DEBUG_MODEM_OPEN
1683 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1684 #endif
1685 module_put(info->owner);
1686 return;
1687 }
1688 info->flags |= ISDN_ASYNC_CLOSING;
1689 /*
1690 * Save the termios structure, since this port may have
1691 * separate termios for callout and dialin.
1692 */
1693 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1694 info->normal_termios = *tty->termios;
1695 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1696 info->callout_termios = *tty->termios;
1697
1698 tty->closing = 1;
1699 /*
1700 * At this point we stop accepting input. To do this, we
1701 * disable the receive line status interrupts, and tell the
1702 * interrupt driver to stop checking the data ready bit in the
1703 * line status register.
1704 */
1705 if (info->flags & ISDN_ASYNC_INITIALIZED) {
1706 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1707 /*
1708 * Before we drop DTR, make sure the UART transmitter
1709 * has completely drained; this is especially
1710 * important if there is a transmit FIFO!
1711 */
1712 timeout = jiffies + HZ;
1713 while (!(info->lsr & UART_LSR_TEMT)) {
1714 schedule_timeout_interruptible(20);
1715 if (time_after(jiffies,timeout))
1716 break;
1717 }
1718 }
1719 dev->modempoll--;
1720 isdn_tty_shutdown(info);
1721
1722 if (tty->driver->flush_buffer)
1723 tty->driver->flush_buffer(tty);
1724 tty_ldisc_flush(tty);
1725 info->tty = NULL;
1726 info->ncarrier = 0;
1727 tty->closing = 0;
1728 module_put(info->owner);
1729 if (info->blocked_open) {
1730 msleep_interruptible(500);
1731 wake_up_interruptible(&info->open_wait);
1732 }
1733 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1734 wake_up_interruptible(&info->close_wait);
1735 #ifdef ISDN_DEBUG_MODEM_OPEN
1736 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1737 #endif
1738 }
1739
1740 /*
1741 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1742 */
1743 static void
1744 isdn_tty_hangup(struct tty_struct *tty)
1745 {
1746 modem_info *info = (modem_info *) tty->driver_data;
1747
1748 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1749 return;
1750 isdn_tty_shutdown(info);
1751 info->count = 0;
1752 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1753 info->tty = NULL;
1754 wake_up_interruptible(&info->open_wait);
1755 }
1756
1757 /* This routine initializes all emulator-data.
1758 */
1759 static void
1760 isdn_tty_reset_profile(atemu * m)
1761 {
1762 m->profile[0] = 0;
1763 m->profile[1] = 0;
1764 m->profile[2] = 43;
1765 m->profile[3] = 13;
1766 m->profile[4] = 10;
1767 m->profile[5] = 8;
1768 m->profile[6] = 3;
1769 m->profile[7] = 60;
1770 m->profile[8] = 2;
1771 m->profile[9] = 6;
1772 m->profile[10] = 7;
1773 m->profile[11] = 70;
1774 m->profile[12] = 0x45;
1775 m->profile[13] = 4;
1776 m->profile[14] = ISDN_PROTO_L2_X75I;
1777 m->profile[15] = ISDN_PROTO_L3_TRANS;
1778 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1779 m->profile[17] = ISDN_MODEM_WINSIZE;
1780 m->profile[18] = 4;
1781 m->profile[19] = 0;
1782 m->profile[20] = 0;
1783 m->profile[23] = 0;
1784 m->pmsn[0] = '\0';
1785 m->plmsn[0] = '\0';
1786 }
1787
1788 #ifdef CONFIG_ISDN_AUDIO
1789 static void
1790 isdn_tty_modem_reset_vpar(atemu * m)
1791 {
1792 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1793 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1794 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1795 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1796 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1797 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1798 }
1799 #endif
1800
1801 #ifdef CONFIG_ISDN_TTY_FAX
1802 static void
1803 isdn_tty_modem_reset_faxpar(modem_info * info)
1804 {
1805 T30_s *f = info->fax;
1806
1807 f->code = 0;
1808 f->phase = ISDN_FAX_PHASE_IDLE;
1809 f->direction = 0;
1810 f->resolution = 1; /* fine */
1811 f->rate = 5; /* 14400 bit/s */
1812 f->width = 0;
1813 f->length = 0;
1814 f->compression = 0;
1815 f->ecm = 0;
1816 f->binary = 0;
1817 f->scantime = 0;
1818 memset(&f->id[0], 32, FAXIDLEN - 1);
1819 f->id[FAXIDLEN - 1] = 0;
1820 f->badlin = 0;
1821 f->badmul = 0;
1822 f->bor = 0;
1823 f->nbc = 0;
1824 f->cq = 0;
1825 f->cr = 0;
1826 f->ctcrty = 0;
1827 f->minsp = 0;
1828 f->phcto = 30;
1829 f->rel = 0;
1830 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1831 f->pollid[FAXIDLEN - 1] = 0;
1832 }
1833 #endif
1834
1835 static void
1836 isdn_tty_modem_reset_regs(modem_info * info, int force)
1837 {
1838 atemu *m = &info->emu;
1839 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1840 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1841 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1842 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1843 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1844 }
1845 #ifdef CONFIG_ISDN_AUDIO
1846 isdn_tty_modem_reset_vpar(m);
1847 #endif
1848 #ifdef CONFIG_ISDN_TTY_FAX
1849 isdn_tty_modem_reset_faxpar(info);
1850 #endif
1851 m->mdmcmdl = 0;
1852 }
1853
1854 static void
1855 modem_write_profile(atemu * m)
1856 {
1857 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1858 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1859 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1860 if (dev->profd)
1861 send_sig(SIGIO, dev->profd, 1);
1862 }
1863
1864 static const struct tty_operations modem_ops = {
1865 .open = isdn_tty_open,
1866 .close = isdn_tty_close,
1867 .write = isdn_tty_write,
1868 .flush_chars = isdn_tty_flush_chars,
1869 .write_room = isdn_tty_write_room,
1870 .chars_in_buffer = isdn_tty_chars_in_buffer,
1871 .flush_buffer = isdn_tty_flush_buffer,
1872 .ioctl = isdn_tty_ioctl,
1873 .throttle = isdn_tty_throttle,
1874 .unthrottle = isdn_tty_unthrottle,
1875 .set_termios = isdn_tty_set_termios,
1876 .hangup = isdn_tty_hangup,
1877 .tiocmget = isdn_tty_tiocmget,
1878 .tiocmset = isdn_tty_tiocmset,
1879 };
1880
1881 int
1882 isdn_tty_modem_init(void)
1883 {
1884 isdn_modem_t *m;
1885 int i, retval;
1886 modem_info *info;
1887
1888 m = &dev->mdm;
1889 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1890 if (!m->tty_modem)
1891 return -ENOMEM;
1892 m->tty_modem->name = "ttyI";
1893 m->tty_modem->major = ISDN_TTY_MAJOR;
1894 m->tty_modem->minor_start = 0;
1895 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1896 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1897 m->tty_modem->init_termios = tty_std_termios;
1898 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1899 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1900 m->tty_modem->driver_name = "isdn_tty";
1901 tty_set_operations(m->tty_modem, &modem_ops);
1902 retval = tty_register_driver(m->tty_modem);
1903 if (retval) {
1904 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1905 goto err;
1906 }
1907 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1908 info = &m->info[i];
1909 #ifdef CONFIG_ISDN_TTY_FAX
1910 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1911 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1912 retval = -ENOMEM;
1913 goto err_unregister;
1914 }
1915 #endif
1916 #ifdef MODULE
1917 info->owner = THIS_MODULE;
1918 #endif
1919 spin_lock_init(&info->readlock);
1920 sprintf(info->last_cause, "0000");
1921 sprintf(info->last_num, "none");
1922 info->last_dir = 0;
1923 info->last_lhup = 1;
1924 info->last_l2 = -1;
1925 info->last_si = 0;
1926 isdn_tty_reset_profile(&info->emu);
1927 isdn_tty_modem_reset_regs(info, 1);
1928 info->magic = ISDN_ASYNC_MAGIC;
1929 info->line = i;
1930 info->tty = NULL;
1931 info->x_char = 0;
1932 info->count = 0;
1933 info->blocked_open = 0;
1934 init_waitqueue_head(&info->open_wait);
1935 init_waitqueue_head(&info->close_wait);
1936 info->isdn_driver = -1;
1937 info->isdn_channel = -1;
1938 info->drv_index = -1;
1939 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1940 init_timer(&info->nc_timer);
1941 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1942 info->nc_timer.data = (unsigned long) info;
1943 skb_queue_head_init(&info->xmit_queue);
1944 #ifdef CONFIG_ISDN_AUDIO
1945 skb_queue_head_init(&info->dtmf_queue);
1946 #endif
1947 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1948 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1949 retval = -ENOMEM;
1950 goto err_unregister;
1951 }
1952 /* Make room for T.70 header */
1953 info->xmit_buf += 4;
1954 }
1955 return 0;
1956 err_unregister:
1957 for (i--; i >= 0; i--) {
1958 info = &m->info[i];
1959 #ifdef CONFIG_ISDN_TTY_FAX
1960 kfree(info->fax);
1961 #endif
1962 kfree(info->xmit_buf - 4);
1963 }
1964 tty_unregister_driver(m->tty_modem);
1965 err:
1966 put_tty_driver(m->tty_modem);
1967 m->tty_modem = NULL;
1968 return retval;
1969 }
1970
1971 void
1972 isdn_tty_exit(void)
1973 {
1974 modem_info *info;
1975 int i;
1976
1977 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1978 info = &dev->mdm.info[i];
1979 isdn_tty_cleanup_xmit(info);
1980 #ifdef CONFIG_ISDN_TTY_FAX
1981 kfree(info->fax);
1982 #endif
1983 kfree(info->xmit_buf - 4);
1984 }
1985 tty_unregister_driver(dev->mdm.tty_modem);
1986 put_tty_driver(dev->mdm.tty_modem);
1987 dev->mdm.tty_modem = NULL;
1988 }
1989
1990
1991 /*
1992 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1993 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1994 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1995 */
1996
1997 static int
1998 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1999 {
2000 #ifdef ISDN_DEBUG_MODEM_ICALL
2001 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
2002 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
2003 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
2004 #endif
2005 if (strlen(emu->lmsn)) {
2006 char *p = emu->lmsn;
2007 char *q;
2008 int tmp;
2009 int ret = 0;
2010
2011 while (1) {
2012 if ((q = strchr(p, ';')))
2013 *q = '\0';
2014 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2015 ret = tmp;
2016 #ifdef ISDN_DEBUG_MODEM_ICALL
2017 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2018 p, isdn_map_eaz2msn(emu->msn, di), tmp);
2019 #endif
2020 if (q) {
2021 *q = ';';
2022 p = q;
2023 p++;
2024 }
2025 if (!tmp)
2026 return 0;
2027 if (!q)
2028 break;
2029 }
2030 return ret;
2031 } else {
2032 int tmp;
2033 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2034 #ifdef ISDN_DEBUG_MODEM_ICALL
2035 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2036 isdn_map_eaz2msn(emu->msn, di), tmp);
2037 #endif
2038 return tmp;
2039 }
2040 }
2041
2042 /*
2043 * An incoming call-request has arrived.
2044 * Search the tty-devices for an appropriate device and bind
2045 * it to the ISDN-Channel.
2046 * Return:
2047 *
2048 * 0 = No matching device found.
2049 * 1 = A matching device found.
2050 * 3 = No match found, but eventually would match, if
2051 * CID is longer.
2052 */
2053 int
2054 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2055 {
2056 char *eaz;
2057 int i;
2058 int wret;
2059 int idx;
2060 int si1;
2061 int si2;
2062 char *nr;
2063 ulong flags;
2064
2065 if (!setup->phone[0]) {
2066 nr = "0";
2067 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2068 } else
2069 nr = setup->phone;
2070 si1 = (int) setup->si1;
2071 si2 = (int) setup->si2;
2072 if (!setup->eazmsn[0]) {
2073 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2074 eaz = "0";
2075 } else
2076 eaz = setup->eazmsn;
2077 #ifdef ISDN_DEBUG_MODEM_ICALL
2078 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2079 #endif
2080 wret = 0;
2081 spin_lock_irqsave(&dev->lock, flags);
2082 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2083 modem_info *info = &dev->mdm.info[i];
2084
2085 if (info->count == 0)
2086 continue;
2087 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
2088 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
2089 idx = isdn_dc2minor(di, ch);
2090 #ifdef ISDN_DEBUG_MODEM_ICALL
2091 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2092 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2093 info->flags, info->isdn_driver, info->isdn_channel,
2094 dev->usage[idx]);
2095 #endif
2096 if (
2097 #ifndef FIX_FILE_TRANSFER
2098 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2099 #endif
2100 (info->isdn_driver == -1) &&
2101 (info->isdn_channel == -1) &&
2102 (USG_NONE(dev->usage[idx]))) {
2103 int matchret;
2104
2105 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2106 wret = matchret;
2107 if (!matchret) { /* EAZ is matching */
2108 info->isdn_driver = di;
2109 info->isdn_channel = ch;
2110 info->drv_index = idx;
2111 dev->m_idx[idx] = info->line;
2112 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2113 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2114 strcpy(dev->num[idx], nr);
2115 strcpy(info->emu.cpn, eaz);
2116 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2117 info->emu.mdmreg[REG_PLAN] = setup->plan;
2118 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2119 isdn_info_update();
2120 spin_unlock_irqrestore(&dev->lock, flags);
2121 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2122 info->line);
2123 info->msr |= UART_MSR_RI;
2124 isdn_tty_modem_result(RESULT_RING, info);
2125 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2126 return 1;
2127 }
2128 }
2129 }
2130 }
2131 spin_unlock_irqrestore(&dev->lock, flags);
2132 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2133 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2134 return (wret == 2)?3:0;
2135 }
2136
2137 #define TTY_IS_ACTIVE(info) \
2138 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2139
2140 int
2141 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2142 {
2143 int mi;
2144 modem_info *info;
2145 char *e;
2146
2147 if (i < 0)
2148 return 0;
2149 if ((mi = dev->m_idx[i]) >= 0) {
2150 info = &dev->mdm.info[mi];
2151 switch (c->command) {
2152 case ISDN_STAT_CINF:
2153 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2154 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2155 if (e == (char *)c->parm.num)
2156 info->emu.charge = 0;
2157
2158 break;
2159 case ISDN_STAT_BSENT:
2160 #ifdef ISDN_TTY_STAT_DEBUG
2161 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2162 #endif
2163 if ((info->isdn_driver == c->driver) &&
2164 (info->isdn_channel == c->arg)) {
2165 info->msr |= UART_MSR_CTS;
2166 if (info->send_outstanding)
2167 if (!(--info->send_outstanding))
2168 info->lsr |= UART_LSR_TEMT;
2169 isdn_tty_tint(info);
2170 return 1;
2171 }
2172 break;
2173 case ISDN_STAT_CAUSE:
2174 #ifdef ISDN_TTY_STAT_DEBUG
2175 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2176 #endif
2177 /* Signal cause to tty-device */
2178 strncpy(info->last_cause, c->parm.num, 5);
2179 return 1;
2180 case ISDN_STAT_DISPLAY:
2181 #ifdef ISDN_TTY_STAT_DEBUG
2182 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2183 #endif
2184 /* Signal display to tty-device */
2185 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2186 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2187 isdn_tty_at_cout("\r\n", info);
2188 isdn_tty_at_cout("DISPLAY: ", info);
2189 isdn_tty_at_cout(c->parm.display, info);
2190 isdn_tty_at_cout("\r\n", info);
2191 }
2192 return 1;
2193 case ISDN_STAT_DCONN:
2194 #ifdef ISDN_TTY_STAT_DEBUG
2195 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2196 #endif
2197 if (TTY_IS_ACTIVE(info)) {
2198 if (info->dialing == 1) {
2199 info->dialing = 2;
2200 return 1;
2201 }
2202 }
2203 break;
2204 case ISDN_STAT_DHUP:
2205 #ifdef ISDN_TTY_STAT_DEBUG
2206 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2207 #endif
2208 if (TTY_IS_ACTIVE(info)) {
2209 if (info->dialing == 1)
2210 isdn_tty_modem_result(RESULT_BUSY, info);
2211 if (info->dialing > 1)
2212 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2213 info->dialing = 0;
2214 #ifdef ISDN_DEBUG_MODEM_HUP
2215 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2216 #endif
2217 isdn_tty_modem_hup(info, 0);
2218 return 1;
2219 }
2220 break;
2221 case ISDN_STAT_BCONN:
2222 #ifdef ISDN_TTY_STAT_DEBUG
2223 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2224 #endif
2225 /* Wake up any processes waiting
2226 * for incoming call of this device when
2227 * DCD follow the state of incoming carrier
2228 */
2229 if (info->blocked_open &&
2230 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2231 wake_up_interruptible(&info->open_wait);
2232 }
2233
2234 /* Schedule CONNECT-Message to any tty
2235 * waiting for it and
2236 * set DCD-bit of its modem-status.
2237 */
2238 if (TTY_IS_ACTIVE(info) ||
2239 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2240 info->msr |= UART_MSR_DCD;
2241 info->emu.charge = 0;
2242 if (info->dialing & 0xf)
2243 info->last_dir = 1;
2244 else
2245 info->last_dir = 0;
2246 info->dialing = 0;
2247 info->rcvsched = 1;
2248 if (USG_MODEM(dev->usage[i])) {
2249 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2250 strcpy(info->emu.connmsg, c->parm.num);
2251 isdn_tty_modem_result(RESULT_CONNECT, info);
2252 } else
2253 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2254 }
2255 if (USG_VOICE(dev->usage[i]))
2256 isdn_tty_modem_result(RESULT_VCON, info);
2257 return 1;
2258 }
2259 break;
2260 case ISDN_STAT_BHUP:
2261 #ifdef ISDN_TTY_STAT_DEBUG
2262 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2263 #endif
2264 if (TTY_IS_ACTIVE(info)) {
2265 #ifdef ISDN_DEBUG_MODEM_HUP
2266 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2267 #endif
2268 isdn_tty_modem_hup(info, 0);
2269 return 1;
2270 }
2271 break;
2272 case ISDN_STAT_NODCH:
2273 #ifdef ISDN_TTY_STAT_DEBUG
2274 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2275 #endif
2276 if (TTY_IS_ACTIVE(info)) {
2277 if (info->dialing) {
2278 info->dialing = 0;
2279 info->last_l2 = -1;
2280 info->last_si = 0;
2281 sprintf(info->last_cause, "0000");
2282 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2283 }
2284 isdn_tty_modem_hup(info, 0);
2285 return 1;
2286 }
2287 break;
2288 case ISDN_STAT_UNLOAD:
2289 #ifdef ISDN_TTY_STAT_DEBUG
2290 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2291 #endif
2292 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2293 info = &dev->mdm.info[i];
2294 if (info->isdn_driver == c->driver) {
2295 if (info->online)
2296 isdn_tty_modem_hup(info, 1);
2297 }
2298 }
2299 return 1;
2300 #ifdef CONFIG_ISDN_TTY_FAX
2301 case ISDN_STAT_FAXIND:
2302 if (TTY_IS_ACTIVE(info)) {
2303 isdn_tty_fax_command(info, c);
2304 }
2305 break;
2306 #endif
2307 #ifdef CONFIG_ISDN_AUDIO
2308 case ISDN_STAT_AUDIO:
2309 if (TTY_IS_ACTIVE(info)) {
2310 switch(c->parm.num[0]) {
2311 case ISDN_AUDIO_DTMF:
2312 if (info->vonline) {
2313 isdn_audio_put_dle_code(info,
2314 c->parm.num[1]);
2315 }
2316 break;
2317 }
2318 }
2319 break;
2320 #endif
2321 }
2322 }
2323 return 0;
2324 }
2325
2326 /*********************************************************************
2327 Modem-Emulator-Routines
2328 *********************************************************************/
2329
2330 #define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2331
2332 /*
2333 * Put a message from the AT-emulator into receive-buffer of tty,
2334 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2335 */
2336 void
2337 isdn_tty_at_cout(char *msg, modem_info * info)
2338 {
2339 struct tty_struct *tty;
2340 atemu *m = &info->emu;
2341 char *p;
2342 char c;
2343 u_long flags;
2344 struct sk_buff *skb = NULL;
2345 char *sp = NULL;
2346 int l;
2347
2348 if (!msg) {
2349 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2350 return;
2351 }
2352
2353 l = strlen(msg);
2354
2355 spin_lock_irqsave(&info->readlock, flags);
2356 tty = info->tty;
2357 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2358 spin_unlock_irqrestore(&info->readlock, flags);
2359 return;
2360 }
2361
2362 /* use queue instead of direct, if online and */
2363 /* data is in queue or buffer is full */
2364 if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2365 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2366 skb = alloc_skb(l, GFP_ATOMIC);
2367 if (!skb) {
2368 spin_unlock_irqrestore(&info->readlock, flags);
2369 return;
2370 }
2371 sp = skb_put(skb, l);
2372 #ifdef CONFIG_ISDN_AUDIO
2373 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2374 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2375 #endif
2376 }
2377
2378 for (p = msg; *p; p++) {
2379 switch (*p) {
2380 case '\r':
2381 c = m->mdmreg[REG_CR];
2382 break;
2383 case '\n':
2384 c = m->mdmreg[REG_LF];
2385 break;
2386 case '\b':
2387 c = m->mdmreg[REG_BS];
2388 break;
2389 default:
2390 c = *p;
2391 }
2392 if (skb) {
2393 *sp++ = c;
2394 } else {
2395 if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
2396 break;
2397 }
2398 }
2399 if (skb) {
2400 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2401 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2402 spin_unlock_irqrestore(&info->readlock, flags);
2403 /* Schedule dequeuing */
2404 if (dev->modempoll && info->rcvsched)
2405 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2406
2407 } else {
2408 spin_unlock_irqrestore(&info->readlock, flags);
2409 tty_flip_buffer_push(tty);
2410 }
2411 }
2412
2413 /*
2414 * Perform ATH Hangup
2415 */
2416 static void
2417 isdn_tty_on_hook(modem_info * info)
2418 {
2419 if (info->isdn_channel >= 0) {
2420 #ifdef ISDN_DEBUG_MODEM_HUP
2421 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2422 #endif
2423 isdn_tty_modem_hup(info, 1);
2424 }
2425 }
2426
2427 static void
2428 isdn_tty_off_hook(void)
2429 {
2430 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2431 }
2432
2433 #define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
2434 #define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
2435
2436 /*
2437 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2438 * isdn_tty_modem_escape() if sequence found.
2439 *
2440 * Parameters:
2441 * p pointer to databuffer
2442 * plus escape-character
2443 * count length of buffer
2444 * pluscount count of valid escape-characters so far
2445 * lastplus timestamp of last character
2446 */
2447 static void
2448 isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2449 u_long *lastplus)
2450 {
2451 if (plus > 127)
2452 return;
2453 if (count > 3) {
2454 p += count - 3;
2455 count = 3;
2456 *pluscount = 0;
2457 }
2458 while (count > 0) {
2459 if (*(p++) == plus) {
2460 if ((*pluscount)++) {
2461 /* Time since last '+' > 0.5 sec. ? */
2462 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2463 *pluscount = 1;
2464 } else {
2465 /* Time since last non-'+' < 1.5 sec. ? */
2466 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2467 *pluscount = 0;
2468 }
2469 if ((*pluscount == 3) && (count == 1))
2470 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2471 if (*pluscount > 3)
2472 *pluscount = 1;
2473 } else
2474 *pluscount = 0;
2475 *lastplus = jiffies;
2476 count--;
2477 }
2478 }
2479
2480 /*
2481 * Return result of AT-emulator to tty-receive-buffer, depending on
2482 * modem-register 12, bit 0 and 1.
2483 * For CONNECT-messages also switch to online-mode.
2484 * For RING-message handle auto-ATA if register 0 != 0
2485 */
2486
2487 static void
2488 isdn_tty_modem_result(int code, modem_info * info)
2489 {
2490 atemu *m = &info->emu;
2491 static char *msg[] =
2492 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2493 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2494 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2495 char s[ISDN_MSNLEN+10];
2496
2497 switch (code) {
2498 case RESULT_RING:
2499 m->mdmreg[REG_RINGCNT]++;
2500 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2501 /* Automatically accept incoming call */
2502 isdn_tty_cmd_ATA(info);
2503 break;
2504 case RESULT_NO_CARRIER:
2505 #ifdef ISDN_DEBUG_MODEM_HUP
2506 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2507 (info->flags & ISDN_ASYNC_CLOSING),
2508 (!info->tty));
2509 #endif
2510 m->mdmreg[REG_RINGCNT] = 0;
2511 del_timer(&info->nc_timer);
2512 info->ncarrier = 0;
2513 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2514 return;
2515 }
2516 #ifdef CONFIG_ISDN_AUDIO
2517 if (info->vonline & 1) {
2518 #ifdef ISDN_DEBUG_MODEM_VOICE
2519 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2520 info->line);
2521 #endif
2522 /* voice-recording, add DLE-ETX */
2523 isdn_tty_at_cout("\020\003", info);
2524 }
2525 if (info->vonline & 2) {
2526 #ifdef ISDN_DEBUG_MODEM_VOICE
2527 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2528 info->line);
2529 #endif
2530 /* voice-playing, add DLE-DC4 */
2531 isdn_tty_at_cout("\020\024", info);
2532 }
2533 #endif
2534 break;
2535 case RESULT_CONNECT:
2536 case RESULT_CONNECT64000:
2537 sprintf(info->last_cause, "0000");
2538 if (!info->online)
2539 info->online = 2;
2540 break;
2541 case RESULT_VCON:
2542 #ifdef ISDN_DEBUG_MODEM_VOICE
2543 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2544 info->line);
2545 #endif
2546 sprintf(info->last_cause, "0000");
2547 if (!info->online)
2548 info->online = 1;
2549 break;
2550 } /* switch(code) */
2551
2552 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2553 /* Show results */
2554 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2555 /* Show numeric results only */
2556 sprintf(s, "\r\n%d\r\n", code);
2557 isdn_tty_at_cout(s, info);
2558 } else {
2559 if (code == RESULT_RING) {
2560 /* return if "show RUNG" and ringcounter>1 */
2561 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2562 (m->mdmreg[REG_RINGCNT] > 1))
2563 return;
2564 /* print CID, _before_ _every_ ring */
2565 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2566 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2567 isdn_tty_at_cout(dev->num[info->drv_index], info);
2568 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2569 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2570 isdn_tty_at_cout(info->emu.cpn, info);
2571 }
2572 }
2573 }
2574 isdn_tty_at_cout("\r\n", info);
2575 isdn_tty_at_cout(msg[code], info);
2576 switch (code) {
2577 case RESULT_CONNECT:
2578 switch (m->mdmreg[REG_L2PROT]) {
2579 case ISDN_PROTO_L2_MODEM:
2580 isdn_tty_at_cout(" ", info);
2581 isdn_tty_at_cout(m->connmsg, info);
2582 break;
2583 }
2584 break;
2585 case RESULT_RING:
2586 /* Append CPN, if enabled */
2587 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2588 sprintf(s, "/%s", m->cpn);
2589 isdn_tty_at_cout(s, info);
2590 }
2591 /* Print CID only once, _after_ 1st RING */
2592 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2593 (m->mdmreg[REG_RINGCNT] == 1)) {
2594 isdn_tty_at_cout("\r\n", info);
2595 isdn_tty_at_cout("CALLER NUMBER: ", info);
2596 isdn_tty_at_cout(dev->num[info->drv_index], info);
2597 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2598 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2599 isdn_tty_at_cout(info->emu.cpn, info);
2600 }
2601 }
2602 break;
2603 case RESULT_NO_CARRIER:
2604 case RESULT_NO_DIALTONE:
2605 case RESULT_BUSY:
2606 case RESULT_NO_ANSWER:
2607 m->mdmreg[REG_RINGCNT] = 0;
2608 /* Append Cause-Message if enabled */
2609 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2610 sprintf(s, "/%s", info->last_cause);
2611 isdn_tty_at_cout(s, info);
2612 }
2613 break;
2614 case RESULT_CONNECT64000:
2615 /* Append Protocol to CONNECT message */
2616 switch (m->mdmreg[REG_L2PROT]) {
2617 case ISDN_PROTO_L2_X75I:
2618 case ISDN_PROTO_L2_X75UI:
2619 case ISDN_PROTO_L2_X75BUI:
2620 isdn_tty_at_cout("/X.75", info);
2621 break;
2622 case ISDN_PROTO_L2_HDLC:
2623 isdn_tty_at_cout("/HDLC", info);
2624 break;
2625 case ISDN_PROTO_L2_V11096:
2626 isdn_tty_at_cout("/V110/9600", info);
2627 break;
2628 case ISDN_PROTO_L2_V11019:
2629 isdn_tty_at_cout("/V110/19200", info);
2630 break;
2631 case ISDN_PROTO_L2_V11038:
2632 isdn_tty_at_cout("/V110/38400", info);
2633 break;
2634 }
2635 if (m->mdmreg[REG_T70] & BIT_T70) {
2636 isdn_tty_at_cout("/T.70", info);
2637 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2638 isdn_tty_at_cout("+", info);
2639 }
2640 break;
2641 }
2642 isdn_tty_at_cout("\r\n", info);
2643 }
2644 }
2645 if (code == RESULT_NO_CARRIER) {
2646 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2647 return;
2648 }
2649 #ifdef CONFIG_ISDN_AUDIO
2650 if ( !info->vonline )
2651 tty_ldisc_flush(info->tty);
2652 #else
2653 tty_ldisc_flush(info->tty);
2654 #endif
2655 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2656 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2657 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2658 tty_hangup(info->tty);
2659 }
2660 }
2661 }
2662
2663
2664 /*
2665 * Display a modem-register-value.
2666 */
2667 static void
2668 isdn_tty_show_profile(int ridx, modem_info * info)
2669 {
2670 char v[6];
2671
2672 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2673 isdn_tty_at_cout(v, info);
2674 }
2675
2676 /*
2677 * Get MSN-string from char-pointer, set pointer to end of number
2678 */
2679 static void
2680 isdn_tty_get_msnstr(char *n, char **p)
2681 {
2682 int limit = ISDN_MSNLEN - 1;
2683
2684 while (((*p[0] >= '0' && *p[0] <= '9') ||
2685 /* Why a comma ??? */
2686 (*p[0] == ',') || (*p[0] == ':')) &&
2687 (limit--))
2688 *n++ = *p[0]++;
2689 *n = '\0';
2690 }
2691
2692 /*
2693 * Get phone-number from modem-commandbuffer
2694 */
2695 static void
2696 isdn_tty_getdial(char *p, char *q,int cnt)
2697 {
2698 int first = 1;
2699 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2700 buffer overflow */
2701
2702 while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) {
2703 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2704 ((*p == 'R') && first) ||
2705 (*p == '*') || (*p == '#')) {
2706 *q++ = *p;
2707 limit--;
2708 }
2709 if(!limit)
2710 break;
2711 p++;
2712 first = 0;
2713 }
2714 *q = 0;
2715 }
2716
2717 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2718 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2719
2720 static void
2721 isdn_tty_report(modem_info * info)
2722 {
2723 atemu *m = &info->emu;
2724 char s[80];
2725
2726 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2727 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2728 isdn_tty_at_cout(s, info);
2729 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2730 isdn_tty_at_cout(s, info);
2731 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2732 switch (info->last_l2) {
2733 case ISDN_PROTO_L2_X75I:
2734 isdn_tty_at_cout("X.75i", info);
2735 break;
2736 case ISDN_PROTO_L2_X75UI:
2737 isdn_tty_at_cout("X.75ui", info);
2738 break;
2739 case ISDN_PROTO_L2_X75BUI:
2740 isdn_tty_at_cout("X.75bui", info);
2741 break;
2742 case ISDN_PROTO_L2_HDLC:
2743 isdn_tty_at_cout("HDLC", info);
2744 break;
2745 case ISDN_PROTO_L2_V11096:
2746 isdn_tty_at_cout("V.110 9600 Baud", info);
2747 break;
2748 case ISDN_PROTO_L2_V11019:
2749 isdn_tty_at_cout("V.110 19200 Baud", info);
2750 break;
2751 case ISDN_PROTO_L2_V11038:
2752 isdn_tty_at_cout("V.110 38400 Baud", info);
2753 break;
2754 case ISDN_PROTO_L2_TRANS:
2755 isdn_tty_at_cout("transparent", info);
2756 break;
2757 case ISDN_PROTO_L2_MODEM:
2758 isdn_tty_at_cout("modem", info);
2759 break;
2760 case ISDN_PROTO_L2_FAX:
2761 isdn_tty_at_cout("fax", info);
2762 break;
2763 default:
2764 isdn_tty_at_cout("unknown", info);
2765 break;
2766 }
2767 if (m->mdmreg[REG_T70] & BIT_T70) {
2768 isdn_tty_at_cout("/T.70", info);
2769 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2770 isdn_tty_at_cout("+", info);
2771 }
2772 isdn_tty_at_cout("\r\n", info);
2773 isdn_tty_at_cout(" Service: ", info);
2774 switch (info->last_si) {
2775 case 1:
2776 isdn_tty_at_cout("audio\r\n", info);
2777 break;
2778 case 5:
2779 isdn_tty_at_cout("btx\r\n", info);
2780 break;
2781 case 7:
2782 isdn_tty_at_cout("data\r\n", info);
2783 break;
2784 default:
2785 sprintf(s, "%d\r\n", info->last_si);
2786 isdn_tty_at_cout(s, info);
2787 break;
2788 }
2789 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2790 isdn_tty_at_cout(s, info);
2791 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2792 isdn_tty_at_cout(s, info);
2793 }
2794
2795 /*
2796 * Parse AT&.. commands.
2797 */
2798 static int
2799 isdn_tty_cmd_ATand(char **p, modem_info * info)
2800 {
2801 atemu *m = &info->emu;
2802 int i;
2803 char rb[100];
2804
2805 #define MAXRB (sizeof(rb) - 1)
2806
2807 switch (*p[0]) {
2808 case 'B':
2809 /* &B - Set Buffersize */
2810 p[0]++;
2811 i = isdn_getnum(p);
2812 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2813 PARSE_ERROR1;
2814 #ifdef CONFIG_ISDN_AUDIO
2815 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2816 PARSE_ERROR1;
2817 #endif
2818 m->mdmreg[REG_PSIZE] = i / 16;
2819 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2820 switch (m->mdmreg[REG_L2PROT]) {
2821 case ISDN_PROTO_L2_V11096:
2822 case ISDN_PROTO_L2_V11019:
2823 case ISDN_PROTO_L2_V11038:
2824 info->xmit_size /= 10;
2825 }
2826 break;
2827 case 'C':
2828 /* &C - DCD Status */
2829 p[0]++;
2830 switch (isdn_getnum(p)) {
2831 case 0:
2832 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2833 break;
2834 case 1:
2835 m->mdmreg[REG_DCD] |= BIT_DCD;
2836 break;
2837 default:
2838 PARSE_ERROR1
2839 }
2840 break;
2841 case 'D':
2842 /* &D - Set DTR-Low-behavior */
2843 p[0]++;
2844 switch (isdn_getnum(p)) {
2845 case 0:
2846 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2847 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2848 break;
2849 case 2:
2850 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2851 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2852 break;
2853 case 3:
2854 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2855 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2856 break;
2857 default:
2858 PARSE_ERROR1
2859 }
2860 break;
2861 case 'E':
2862 /* &E -Set EAZ/MSN */
2863 p[0]++;
2864 isdn_tty_get_msnstr(m->msn, p);
2865 break;
2866 case 'F':
2867 /* &F -Set Factory-Defaults */
2868 p[0]++;
2869 if (info->msr & UART_MSR_DCD)
2870 PARSE_ERROR1;
2871 isdn_tty_reset_profile(m);
2872 isdn_tty_modem_reset_regs(info, 1);
2873 break;
2874 #ifdef DUMMY_HAYES_AT
2875 case 'K':
2876 /* only for be compilant with common scripts */
2877 /* &K Flowcontrol - no function */
2878 p[0]++;
2879 isdn_getnum(p);
2880 break;
2881 #endif
2882 case 'L':
2883 /* &L -Set Numbers to listen on */
2884 p[0]++;
2885 i = 0;
2886 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2887 (i < ISDN_LMSNLEN - 1))
2888 m->lmsn[i++] = *p[0]++;
2889 m->lmsn[i] = '\0';
2890 break;
2891 case 'R':
2892 /* &R - Set V.110 bitrate adaption */
2893 p[0]++;
2894 i = isdn_getnum(p);
2895 switch (i) {
2896 case 0:
2897 /* Switch off V.110, back to X.75 */
2898 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2899 m->mdmreg[REG_SI2] = 0;
2900 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2901 break;
2902 case 9600:
2903 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2904 m->mdmreg[REG_SI2] = 197;
2905 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2906 break;
2907 case 19200:
2908 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2909 m->mdmreg[REG_SI2] = 199;
2910 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2911 break;
2912 case 38400:
2913 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2914 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2915 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2916 break;
2917 default:
2918 PARSE_ERROR1;
2919 }
2920 /* Switch off T.70 */
2921 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2922 /* Set Service 7 */
2923 m->mdmreg[REG_SI1] |= 4;
2924 break;
2925 case 'S':
2926 /* &S - Set Windowsize */
2927 p[0]++;
2928 i = isdn_getnum(p);
2929 if ((i > 0) && (i < 9))
2930 m->mdmreg[REG_WSIZE] = i;
2931 else
2932 PARSE_ERROR1;
2933 break;
2934 case 'V':
2935 /* &V - Show registers */
2936 p[0]++;
2937 isdn_tty_at_cout("\r\n", info);
2938 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2939 sprintf(rb, "S%02d=%03d%s", i,
2940 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2941 isdn_tty_at_cout(rb, info);
2942 }
2943 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2944 strlen(m->msn) ? m->msn : "None");
2945 isdn_tty_at_cout(rb, info);
2946 if (strlen(m->lmsn)) {
2947 isdn_tty_at_cout("\r\nListen: ", info);
2948 isdn_tty_at_cout(m->lmsn, info);
2949 isdn_tty_at_cout("\r\n", info);
2950 }
2951 break;
2952 case 'W':
2953 /* &W - Write Profile */
2954 p[0]++;
2955 switch (*p[0]) {
2956 case '0':
2957 p[0]++;
2958 modem_write_profile(m);
2959 break;
2960 default:
2961 PARSE_ERROR1;
2962 }
2963 break;
2964 case 'X':
2965 /* &X - Switch to BTX-Mode and T.70 */
2966 p[0]++;
2967 switch (isdn_getnum(p)) {
2968 case 0:
2969 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2970 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2971 break;
2972 case 1:
2973 m->mdmreg[REG_T70] |= BIT_T70;
2974 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2975 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2976 info->xmit_size = 112;
2977 m->mdmreg[REG_SI1] = 4;
2978 m->mdmreg[REG_SI2] = 0;
2979 break;
2980 case 2:
2981 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2982 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2983 info->xmit_size = 112;
2984 m->mdmreg[REG_SI1] = 4;
2985 m->mdmreg[REG_SI2] = 0;
2986 break;
2987 default:
2988 PARSE_ERROR1;
2989 }
2990 break;
2991 default:
2992 PARSE_ERROR1;
2993 }
2994 return 0;
2995 }
2996
2997 static int
2998 isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
2999 {
3000 /* Some plausibility checks */
3001 switch (mreg) {
3002 case REG_L2PROT:
3003 if (mval > ISDN_PROTO_L2_MAX)
3004 return 1;
3005 break;
3006 case REG_PSIZE:
3007 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
3008 return 1;
3009 #ifdef CONFIG_ISDN_AUDIO
3010 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
3011 return 1;
3012 #endif
3013 info->xmit_size = mval * 16;
3014 switch (m->mdmreg[REG_L2PROT]) {
3015 case ISDN_PROTO_L2_V11096:
3016 case ISDN_PROTO_L2_V11019:
3017 case ISDN_PROTO_L2_V11038:
3018 info->xmit_size /= 10;
3019 }
3020 break;
3021 case REG_SI1I:
3022 case REG_PLAN:
3023 case REG_SCREEN:
3024 /* readonly registers */
3025 return 1;
3026 }
3027 return 0;
3028 }
3029
3030 /*
3031 * Perform ATS command
3032 */
3033 static int
3034 isdn_tty_cmd_ATS(char **p, modem_info * info)
3035 {
3036 atemu *m = &info->emu;
3037 int bitpos;
3038 int mreg;
3039 int mval;
3040 int bval;
3041
3042 mreg = isdn_getnum(p);
3043 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3044 PARSE_ERROR1;
3045 switch (*p[0]) {
3046 case '=':
3047 p[0]++;
3048 mval = isdn_getnum(p);
3049 if (mval < 0 || mval > 255)
3050 PARSE_ERROR1;
3051 if (isdn_tty_check_ats(mreg, mval, info, m))
3052 PARSE_ERROR1;
3053 m->mdmreg[mreg] = mval;
3054 break;
3055 case '.':
3056 /* Set/Clear a single bit */
3057 p[0]++;
3058 bitpos = isdn_getnum(p);
3059 if ((bitpos < 0) || (bitpos > 7))
3060 PARSE_ERROR1;
3061 switch (*p[0]) {
3062 case '=':
3063 p[0]++;
3064 bval = isdn_getnum(p);
3065 if (bval < 0 || bval > 1)
3066 PARSE_ERROR1;
3067 if (bval)
3068 mval = m->mdmreg[mreg] | (1 << bitpos);
3069 else
3070 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3071 if (isdn_tty_check_ats(mreg, mval, info, m))
3072 PARSE_ERROR1;
3073 m->mdmreg[mreg] = mval;
3074 break;
3075 case '?':
3076 p[0]++;
3077 isdn_tty_at_cout("\r\n", info);
3078 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3079 info);
3080 break;
3081 default:
3082 PARSE_ERROR1;
3083 }
3084 break;
3085 case '?':
3086 p[0]++;
3087 isdn_tty_show_profile(mreg, info);
3088 break;
3089 default:
3090 PARSE_ERROR1;
3091 break;
3092 }
3093 return 0;
3094 }
3095
3096 /*
3097 * Perform ATA command
3098 */
3099 static void
3100 isdn_tty_cmd_ATA(modem_info * info)
3101 {
3102 atemu *m = &info->emu;
3103 isdn_ctrl cmd;
3104 int l2;
3105
3106 if (info->msr & UART_MSR_RI) {
3107 /* Accept incoming call */
3108 info->last_dir = 0;
3109 strcpy(info->last_num, dev->num[info->drv_index]);
3110 m->mdmreg[REG_RINGCNT] = 0;
3111 info->msr &= ~UART_MSR_RI;
3112 l2 = m->mdmreg[REG_L2PROT];
3113 #ifdef CONFIG_ISDN_AUDIO
3114 /* If more than one bit set in reg18, autoselect Layer2 */
3115 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3116 if (m->mdmreg[REG_SI1I] == 1) {
3117 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3118 l2 = ISDN_PROTO_L2_TRANS;
3119 } else
3120 l2 = ISDN_PROTO_L2_X75I;
3121 }
3122 #endif
3123 cmd.driver = info->isdn_driver;
3124 cmd.command = ISDN_CMD_SETL2;
3125 cmd.arg = info->isdn_channel + (l2 << 8);
3126 info->last_l2 = l2;
3127 isdn_command(&cmd);
3128 cmd.driver = info->isdn_driver;
3129 cmd.command = ISDN_CMD_SETL3;
3130 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3131 #ifdef CONFIG_ISDN_TTY_FAX
3132 if (l2 == ISDN_PROTO_L2_FAX) {
3133 cmd.parm.fax = info->fax;
3134 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3135 }
3136 #endif
3137 isdn_command(&cmd);
3138 cmd.driver = info->isdn_driver;
3139 cmd.arg = info->isdn_channel;
3140 cmd.command = ISDN_CMD_ACCEPTD;
3141 info->dialing = 16;
3142 info->emu.carrierwait = 0;
3143 isdn_command(&cmd);
3144 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3145 } else
3146 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3147 }
3148
3149 #ifdef CONFIG_ISDN_AUDIO
3150 /*
3151 * Parse AT+F.. commands
3152 */
3153 static int
3154 isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3155 {
3156 atemu *m = &info->emu;
3157 char rs[20];
3158
3159 if (!strncmp(p[0], "CLASS", 5)) {
3160 p[0] += 5;
3161 switch (*p[0]) {
3162 case '?':
3163 p[0]++;
3164 sprintf(rs, "\r\n%d",
3165 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3166 #ifdef CONFIG_ISDN_TTY_FAX
3167 if (TTY_IS_FCLASS2(info))
3168 sprintf(rs, "\r\n2");
3169 else if (TTY_IS_FCLASS1(info))
3170 sprintf(rs, "\r\n1");
3171 #endif
3172 isdn_tty_at_cout(rs, info);
3173 break;
3174 case '=':
3175 p[0]++;
3176 switch (*p[0]) {
3177 case '0':
3178 p[0]++;
3179 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3180 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3181 m->mdmreg[REG_SI1] = 4;
3182 info->xmit_size =
3183 m->mdmreg[REG_PSIZE] * 16;
3184 break;
3185 #ifdef CONFIG_ISDN_TTY_FAX
3186 case '1':
3187 p[0]++;
3188 if (!(dev->global_features &
3189 ISDN_FEATURE_L3_FCLASS1))
3190 PARSE_ERROR1;
3191 m->mdmreg[REG_SI1] = 1;
3192 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3193 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3194 info->xmit_size =
3195 m->mdmreg[REG_PSIZE] * 16;
3196 break;
3197 case '2':
3198 p[0]++;
3199 if (!(dev->global_features &
3200 ISDN_FEATURE_L3_FCLASS2))
3201 PARSE_ERROR1;
3202 m->mdmreg[REG_SI1] = 1;
3203 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3204 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3205 info->xmit_size =
3206 m->mdmreg[REG_PSIZE] * 16;
3207 break;
3208 #endif
3209 case '8':
3210 p[0]++;
3211 /* L2 will change on dialout with si=1 */
3212 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3213 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3214 m->mdmreg[REG_SI1] = 5;
3215 info->xmit_size = VBUF;
3216 break;
3217 case '?':
3218 p[0]++;
3219 strcpy(rs, "\r\n0,");
3220 #ifdef CONFIG_ISDN_TTY_FAX
3221 if (dev->global_features &
3222 ISDN_FEATURE_L3_FCLASS1)
3223 strcat(rs, "1,");
3224 if (dev->global_features &
3225 ISDN_FEATURE_L3_FCLASS2)
3226 strcat(rs, "2,");
3227 #endif
3228 strcat(rs, "8");
3229 isdn_tty_at_cout(rs, info);
3230 break;
3231 default:
3232 PARSE_ERROR1;
3233 }
3234 break;
3235 default:
3236 PARSE_ERROR1;
3237 }
3238 return 0;
3239 }
3240 #ifdef CONFIG_ISDN_TTY_FAX
3241 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3242 #else
3243 PARSE_ERROR1;
3244 #endif
3245 }
3246
3247 /*
3248 * Parse AT+V.. commands
3249 */
3250 static int
3251 isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3252 {
3253 atemu *m = &info->emu;
3254 isdn_ctrl cmd;
3255 static char *vcmd[] =
3256 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3257 int i;
3258 int par1;
3259 int par2;
3260 char rs[20];
3261
3262 i = 0;
3263 while (vcmd[i]) {
3264 if (!strncmp(vcmd[i], p[0], 2)) {
3265 p[0] += 2;
3266 break;
3267 }
3268 i++;
3269 }
3270 switch (i) {
3271 case 0:
3272 /* AT+VNH - Auto hangup feature */
3273 switch (*p[0]) {
3274 case '?':
3275 p[0]++;
3276 isdn_tty_at_cout("\r\n1", info);
3277 break;
3278 case '=':
3279 p[0]++;
3280 switch (*p[0]) {
3281 case '1':
3282 p[0]++;
3283 break;
3284 case '?':
3285 p[0]++;
3286 isdn_tty_at_cout("\r\n1", info);
3287 break;
3288 default:
3289 PARSE_ERROR1;
3290 }
3291 break;
3292 default:
3293 PARSE_ERROR1;
3294 }
3295 break;
3296 case 1:
3297 /* AT+VIP - Reset all voice parameters */
3298 isdn_tty_modem_reset_vpar(m);
3299 break;
3300 case 2:
3301 /* AT+VLS - Select device, accept incoming call */
3302 switch (*p[0]) {
3303 case '?':
3304 p[0]++;
3305 sprintf(rs, "\r\n%d", m->vpar[0]);
3306 isdn_tty_at_cout(rs, info);
3307 break;
3308 case '=':
3309 p[0]++;
3310 switch (*p[0]) {
3311 case '0':
3312 p[0]++;
3313 m->vpar[0] = 0;
3314 break;
3315 case '2':
3316 p[0]++;
3317 m->vpar[0] = 2;
3318 break;
3319 case '?':
3320 p[0]++;
3321 isdn_tty_at_cout("\r\n0,2", info);
3322 break;
3323 default:
3324 PARSE_ERROR1;
3325 }
3326 break;
3327 default:
3328 PARSE_ERROR1;
3329 }
3330 break;
3331 case 3:
3332 /* AT+VRX - Start recording */
3333 if (!m->vpar[0])
3334 PARSE_ERROR1;
3335 if (info->online != 1) {
3336 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3337 return 1;
3338 }
3339 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3340 if (!info->dtmf_state) {
3341 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3342 PARSE_ERROR1;
3343 }
3344 info->silence_state = isdn_audio_silence_init(info->silence_state);
3345 if (!info->silence_state) {
3346 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3347 PARSE_ERROR1;
3348 }
3349 if (m->vpar[3] < 5) {
3350 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3351 if (!info->adpcmr) {
3352 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3353 PARSE_ERROR1;
3354 }
3355 }
3356 #ifdef ISDN_DEBUG_AT
3357 printk(KERN_DEBUG "AT: +VRX\n");
3358 #endif
3359 info->vonline |= 1;
3360 isdn_tty_modem_result(RESULT_CONNECT, info);
3361 return 0;
3362 break;
3363 case 4:
3364 /* AT+VSD - Silence detection */
3365 switch (*p[0]) {
3366 case '?':
3367 p[0]++;
3368 sprintf(rs, "\r\n<%d>,<%d>",
3369 m->vpar[1],
3370 m->vpar[2]);
3371 isdn_tty_at_cout(rs, info);
3372 break;
3373 case '=':
3374 p[0]++;
3375 if ((*p[0]>='0') && (*p[0]<='9')) {
3376 par1 = isdn_getnum(p);
3377 if ((par1 < 0) || (par1 > 31))
3378 PARSE_ERROR1;
3379 if (*p[0] != ',')
3380 PARSE_ERROR1;
3381 p[0]++;
3382 par2 = isdn_getnum(p);
3383 if ((par2 < 0) || (par2 > 255))
3384 PARSE_ERROR1;
3385 m->vpar[1] = par1;
3386 m->vpar[2] = par2;
3387 break;
3388 } else
3389 if (*p[0] == '?') {
3390 p[0]++;
3391 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3392 info);
3393 break;
3394 } else
3395 PARSE_ERROR1;
3396 break;
3397 default:
3398 PARSE_ERROR1;
3399 }
3400 break;
3401 case 5:
3402 /* AT+VSM - Select compression */
3403 switch (*p[0]) {
3404 case '?':
3405 p[0]++;
3406 sprintf(rs, "\r\n<%d>,<%d><8000>",
3407 m->vpar[3],
3408 m->vpar[1]);
3409 isdn_tty_at_cout(rs, info);
3410 break;
3411 case '=':
3412 p[0]++;
3413 switch (*p[0]) {
3414 case '2':
3415 case '3':
3416 case '4':
3417 case '5':
3418 case '6':
3419 par1 = isdn_getnum(p);
3420 if ((par1 < 2) || (par1 > 6))
3421 PARSE_ERROR1;
3422 m->vpar[3] = par1;
3423 break;
3424 case '?':
3425 p[0]++;
3426 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3427 info);
3428 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3429 info);
3430 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3431 info);
3432 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3433 info);
3434 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3435 info);
3436 break;
3437 default:
3438 PARSE_ERROR1;
3439 }
3440 break;
3441 default:
3442 PARSE_ERROR1;
3443 }
3444 break;
3445 case 6:
3446 /* AT+VTX - Start sending */
3447 if (!m->vpar[0])
3448 PARSE_ERROR1;
3449 if (info->online != 1) {
3450 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3451 return 1;
3452 }
3453 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3454 if (!info->dtmf_state) {
3455 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3456 PARSE_ERROR1;
3457 }
3458 if (m->vpar[3] < 5) {
3459 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3460 if (!info->adpcms) {
3461 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3462 PARSE_ERROR1;
3463 }
3464 }
3465 #ifdef ISDN_DEBUG_AT
3466 printk(KERN_DEBUG "AT: +VTX\n");
3467 #endif
3468 m->lastDLE = 0;
3469 info->vonline |= 2;
3470 isdn_tty_modem_result(RESULT_CONNECT, info);
3471 return 0;
3472 break;
3473 case 7:
3474 /* AT+VDD - DTMF detection */
3475 switch (*p[0]) {
3476 case '?':
3477 p[0]++;
3478 sprintf(rs, "\r\n<%d>,<%d>",
3479 m->vpar[4],
3480 m->vpar[5]);
3481 isdn_tty_at_cout(rs, info);
3482 break;
3483 case '=':
3484 p[0]++;
3485 if ((*p[0]>='0') && (*p[0]<='9')) {
3486 if (info->online != 1)
3487 PARSE_ERROR1;
3488 par1 = isdn_getnum(p);
3489 if ((par1 < 0) || (par1 > 15))
3490 PARSE_ERROR1;
3491 if (*p[0] != ',')
3492 PARSE_ERROR1;
3493 p[0]++;
3494 par2 = isdn_getnum(p);
3495 if ((par2 < 0) || (par2 > 255))
3496 PARSE_ERROR1;
3497 m->vpar[4] = par1;
3498 m->vpar[5] = par2;
3499 cmd.driver = info->isdn_driver;
3500 cmd.command = ISDN_CMD_AUDIO;
3501 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3502 cmd.parm.num[0] = par1;
3503 cmd.parm.num[1] = par2;
3504 isdn_command(&cmd);
3505 break;
3506 } else
3507 if (*p[0] == '?') {
3508 p[0]++;
3509 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3510 info);
3511 break;
3512 } else
3513 PARSE_ERROR1;
3514 break;
3515 default:
3516 PARSE_ERROR1;
3517 }
3518 break;
3519 default:
3520 PARSE_ERROR1;
3521 }
3522 return 0;
3523 }
3524 #endif /* CONFIG_ISDN_AUDIO */
3525
3526 /*
3527 * Parse and perform an AT-command-line.
3528 */
3529 static void
3530 isdn_tty_parse_at(modem_info * info)
3531 {
3532 atemu *m = &info->emu;
3533 char *p;
3534 char ds[40];
3535
3536 #ifdef ISDN_DEBUG_AT
3537 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3538 #endif
3539 for (p = &m->mdmcmd[2]; *p;) {
3540 switch (*p) {
3541 case ' ':
3542 p++;
3543 break;
3544 case 'A':
3545 /* A - Accept incoming call */
3546 p++;
3547 isdn_tty_cmd_ATA(info);
3548 return;
3549 break;
3550 case 'D':
3551 /* D - Dial */
3552 if (info->msr & UART_MSR_DCD)
3553 PARSE_ERROR;
3554 if (info->msr & UART_MSR_RI) {
3555 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3556 return;
3557 }
3558 isdn_tty_getdial(++p, ds, sizeof ds);
3559 p += strlen(p);
3560 if (!strlen(m->msn))
3561 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3562 else if (strlen(ds))
3563 isdn_tty_dial(ds, info, m);
3564 else
3565 PARSE_ERROR;
3566 return;
3567 case 'E':
3568 /* E - Turn Echo on/off */
3569 p++;
3570 switch (isdn_getnum(&p)) {
3571 case 0:
3572 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3573 break;
3574 case 1:
3575 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3576 break;
3577 default:
3578 PARSE_ERROR;
3579 }
3580 break;
3581 case 'H':
3582 /* H - On/Off-hook */
3583 p++;
3584 switch (*p) {
3585 case '0':
3586 p++;
3587 isdn_tty_on_hook(info);
3588 break;
3589 case '1':
3590 p++;
3591 isdn_tty_off_hook();
3592 break;
3593 default:
3594 isdn_tty_on_hook(info);
3595 break;
3596 }
3597 break;
3598 case 'I':
3599 /* I - Information */
3600 p++;
3601 isdn_tty_at_cout("\r\nLinux ISDN", info);
3602 switch (*p) {
3603 case '0':
3604 case '1':
3605 p++;
3606 break;
3607 case '2':
3608 p++;
3609 isdn_tty_report(info);
3610 break;
3611 case '3':
3612 p++;
3613 sprintf(ds, "\r\n%d", info->emu.charge);
3614 isdn_tty_at_cout(ds, info);
3615 break;
3616 default:;
3617 }
3618 break;
3619 #ifdef DUMMY_HAYES_AT
3620 case 'L':
3621 case 'M':
3622 /* only for be compilant with common scripts */
3623 /* no function */
3624 p++;
3625 isdn_getnum(&p);
3626 break;
3627 #endif
3628 case 'O':
3629 /* O - Go online */
3630 p++;
3631 if (info->msr & UART_MSR_DCD)
3632 /* if B-Channel is up */
3633 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3634 else
3635 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3636 return;
3637 case 'Q':
3638 /* Q - Turn Emulator messages on/off */
3639 p++;
3640 switch (isdn_getnum(&p)) {
3641 case 0:
3642 m->mdmreg[REG_RESP] |= BIT_RESP;
3643 break;
3644 case 1:
3645 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3646 break;
3647 default:
3648 PARSE_ERROR;
3649 }
3650 break;
3651 case 'S':
3652 /* S - Set/Get Register */
3653 p++;
3654 if (isdn_tty_cmd_ATS(&p, info))
3655 return;
3656 break;
3657 case 'V':
3658 /* V - Numeric or ASCII Emulator-messages */
3659 p++;
3660 switch (isdn_getnum(&p)) {
3661 case 0:
3662 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3663 break;
3664 case 1:
3665 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3666 break;
3667 default:
3668 PARSE_ERROR;
3669 }
3670 break;
3671 case 'Z':
3672 /* Z - Load Registers from Profile */
3673 p++;
3674 if (info->msr & UART_MSR_DCD) {
3675 info->online = 0;
3676 isdn_tty_on_hook(info);
3677 }
3678 isdn_tty_modem_reset_regs(info, 1);
3679 break;
3680 case '+':
3681 p++;
3682 switch (*p) {
3683 #ifdef CONFIG_ISDN_AUDIO
3684 case 'F':
3685 p++;
3686 if (isdn_tty_cmd_PLUSF(&p, info))
3687 return;
3688 break;
3689 case 'V':
3690 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3691 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3692 PARSE_ERROR;
3693 p++;
3694 if (isdn_tty_cmd_PLUSV(&p, info))
3695 return;
3696 break;
3697 #endif /* CONFIG_ISDN_AUDIO */
3698 case 'S': /* SUSPEND */
3699 p++;
3700 isdn_tty_get_msnstr(ds, &p);
3701 isdn_tty_suspend(ds, info, m);
3702 break;
3703 case 'R': /* RESUME */
3704 p++;
3705 isdn_tty_get_msnstr(ds, &p);
3706 isdn_tty_resume(ds, info, m);
3707 break;
3708 case 'M': /* MESSAGE */
3709 p++;
3710 isdn_tty_send_msg(info, m, p);
3711 break;
3712 default:
3713 PARSE_ERROR;
3714 }
3715 break;
3716 case '&':
3717 p++;
3718 if (isdn_tty_cmd_ATand(&p, info))
3719 return;
3720 break;
3721 default:
3722 PARSE_ERROR;
3723 }
3724 }
3725 #ifdef CONFIG_ISDN_AUDIO
3726 if (!info->vonline)
3727 #endif
3728 isdn_tty_modem_result(RESULT_OK, info);
3729 }
3730
3731 /* Need own toupper() because standard-toupper is not available
3732 * within modules.
3733 */
3734 #define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3735
3736 /*
3737 * Perform line-editing of AT-commands
3738 *
3739 * Parameters:
3740 * p inputbuffer
3741 * count length of buffer
3742 * channel index to line (minor-device)
3743 */
3744 static int
3745 isdn_tty_edit_at(const char *p, int count, modem_info * info)
3746 {
3747 atemu *m = &info->emu;
3748 int total = 0;
3749 u_char c;
3750 char eb[2];
3751 int cnt;
3752
3753 for (cnt = count; cnt > 0; p++, cnt--) {
3754 c = *p;
3755 total++;
3756 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3757 /* Separator (CR or LF) */
3758 m->mdmcmd[m->mdmcmdl] = 0;
3759 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3760 eb[0] = c;
3761 eb[1] = 0;
3762 isdn_tty_at_cout(eb, info);
3763 }
3764 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3765 isdn_tty_parse_at(info);
3766 m->mdmcmdl = 0;
3767 continue;
3768 }
3769 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3770 /* Backspace-Function */
3771 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3772 if (m->mdmcmdl)
3773 m->mdmcmdl--;
3774 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3775 isdn_tty_at_cout("\b", info);
3776 }
3777 continue;
3778 }
3779 if (cmdchar(c)) {
3780 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3781 eb[0] = c;
3782 eb[1] = 0;
3783 isdn_tty_at_cout(eb, info);
3784 }
3785 if (m->mdmcmdl < 255) {
3786 c = my_toupper(c);
3787 switch (m->mdmcmdl) {
3788 case 1:
3789 if (c == 'T') {
3790 m->mdmcmd[m->mdmcmdl] = c;
3791 m->mdmcmd[++m->mdmcmdl] = 0;
3792 break;
3793 } else
3794 m->mdmcmdl = 0;
3795 /* Fall through, check for 'A' */
3796 case 0:
3797 if (c == 'A') {
3798 m->mdmcmd[m->mdmcmdl] = c;
3799 m->mdmcmd[++m->mdmcmdl] = 0;
3800 }
3801 break;
3802 default:
3803 m->mdmcmd[m->mdmcmdl] = c;
3804 m->mdmcmd[++m->mdmcmdl] = 0;
3805 }
3806 }
3807 }
3808 }
3809 return total;
3810 }
3811
3812 /*
3813 * Switch all modem-channels who are online and got a valid
3814 * escape-sequence 1.5 seconds ago, to command-mode.
3815 * This function is called every second via timer-interrupt from within
3816 * timer-dispatcher isdn_timer_function()
3817 */
3818 void
3819 isdn_tty_modem_escape(void)
3820 {
3821 int ton = 0;
3822 int i;
3823 int midx;
3824
3825 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3826 if (USG_MODEM(dev->usage[i]))
3827 if ((midx = dev->m_idx[i]) >= 0) {
3828 modem_info *info = &dev->mdm.info[midx];
3829 if (info->online) {
3830 ton = 1;
3831 if ((info->emu.pluscount == 3) &&
3832 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3833 info->emu.pluscount = 0;
3834 info->online = 0;
3835 isdn_tty_modem_result(RESULT_OK, info);
3836 }
3837 }
3838 }
3839 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3840 }
3841
3842 /*
3843 * Put a RING-message to all modem-channels who have the RI-bit set.
3844 * This function is called every second via timer-interrupt from within
3845 * timer-dispatcher isdn_timer_function()
3846 */
3847 void
3848 isdn_tty_modem_ring(void)
3849 {
3850 int ton = 0;
3851 int i;
3852
3853 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3854 modem_info *info = &dev->mdm.info[i];
3855 if (info->msr & UART_MSR_RI) {
3856 ton = 1;
3857 isdn_tty_modem_result(RESULT_RING, info);
3858 }
3859 }
3860 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3861 }
3862
3863 /*
3864 * For all online tty's, try sending data to
3865 * the lower levels.
3866 */
3867 void
3868 isdn_tty_modem_xmit(void)
3869 {
3870 int ton = 1;
3871 int i;
3872
3873 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3874 modem_info *info = &dev->mdm.info[i];
3875 if (info->online) {
3876 ton = 1;
3877 isdn_tty_senddown(info);
3878 isdn_tty_tint(info);
3879 }
3880 }
3881 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3882 }
3883
3884 /*
3885 * Check all channels if we have a 'no carrier' timeout.
3886 * Timeout value is set by Register S7.
3887 */
3888 void
3889 isdn_tty_carrier_timeout(void)
3890 {
3891 int ton = 0;
3892 int i;
3893
3894 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3895 modem_info *info = &dev->mdm.info[i];
3896 if (info->dialing) {
3897 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3898 info->dialing = 0;
3899 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3900 isdn_tty_modem_hup(info, 1);
3901 }
3902 else
3903 ton = 1;
3904 }
3905 }
3906 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3907 }
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