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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / isdn / i4l / isdn_tty.c
1 /* $Id: isdn_tty.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
2 *
3 * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
4 *
5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
7 *
8 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 */
12 #undef ISDN_TTY_STAT_DEBUG
13
14 #include <linux/isdn.h>
15 #include <linux/slab.h>
16 #include <linux/delay.h>
17 #include <linux/smp_lock.h>
18 #include "isdn_common.h"
19 #include "isdn_tty.h"
20 #ifdef CONFIG_ISDN_AUDIO
21 #include "isdn_audio.h"
22 #define VBUF 0x3e0
23 #define VBUFX (VBUF/16)
24 #endif
25
26 #define FIX_FILE_TRANSFER
27 #define DUMMY_HAYES_AT
28
29 /* Prototypes */
30
31 static int isdn_tty_edit_at(const char *, int, modem_info *);
32 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
33 static void isdn_tty_modem_reset_regs(modem_info *, int);
34 static void isdn_tty_cmd_ATA(modem_info *);
35 static void isdn_tty_flush_buffer(struct tty_struct *);
36 static void isdn_tty_modem_result(int, modem_info *);
37 #ifdef CONFIG_ISDN_AUDIO
38 static int isdn_tty_countDLE(unsigned char *, int);
39 #endif
40
41 /* Leave this unchanged unless you know what you do! */
42 #define MODEM_PARANOIA_CHECK
43 #define MODEM_DO_RESTART
44
45 static int bit2si[8] =
46 {1, 5, 7, 7, 7, 7, 7, 7};
47 static int si2bit[8] =
48 {4, 1, 4, 4, 4, 4, 4, 4};
49
50 char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
51
52
53 /* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
54 * to stuff incoming data directly into a tty's flip-buffer. This
55 * is done to speed up tty-receiving if the receive-queue is empty.
56 * This routine MUST be called with interrupts off.
57 * Return:
58 * 1 = Success
59 * 0 = Failure, data has to be buffered and later processed by
60 * isdn_tty_readmodem().
61 */
62 static int
63 isdn_tty_try_read(modem_info * info, struct sk_buff *skb)
64 {
65 int c;
66 int len;
67 struct tty_struct *tty;
68 char last;
69
70 if (info->online) {
71 if ((tty = info->tty)) {
72 if (info->mcr & UART_MCR_RTS) {
73 len = skb->len
74 #ifdef CONFIG_ISDN_AUDIO
75 + ISDN_AUDIO_SKB_DLECOUNT(skb)
76 #endif
77 ;
78
79 c = tty_buffer_request_room(tty, len);
80 if (c >= len) {
81 #ifdef CONFIG_ISDN_AUDIO
82 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
83 int l = skb->len;
84 unsigned char *dp = skb->data;
85 while (--l) {
86 if (*dp == DLE)
87 tty_insert_flip_char(tty, DLE, 0);
88 tty_insert_flip_char(tty, *dp++, 0);
89 }
90 if (*dp == DLE)
91 tty_insert_flip_char(tty, DLE, 0);
92 last = *dp;
93 } else {
94 #endif
95 if(len > 1)
96 tty_insert_flip_string(tty, skb->data, len - 1);
97 last = skb->data[len - 1];
98 #ifdef CONFIG_ISDN_AUDIO
99 }
100 #endif
101 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
102 tty_insert_flip_char(tty, last, 0xFF);
103 else
104 tty_insert_flip_char(tty, last, TTY_NORMAL);
105 tty_flip_buffer_push(tty);
106 kfree_skb(skb);
107 return 1;
108 }
109 }
110 }
111 }
112 return 0;
113 }
114
115 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
116 * It tries getting received data from the receive queue an stuff it into
117 * the tty's flip-buffer.
118 */
119 void
120 isdn_tty_readmodem(void)
121 {
122 int resched = 0;
123 int midx;
124 int i;
125 int r;
126 struct tty_struct *tty;
127 modem_info *info;
128
129 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
130 if ((midx = dev->m_idx[i]) >= 0) {
131 info = &dev->mdm.info[midx];
132 if (info->online) {
133 r = 0;
134 #ifdef CONFIG_ISDN_AUDIO
135 isdn_audio_eval_dtmf(info);
136 if ((info->vonline & 1) && (info->emu.vpar[1]))
137 isdn_audio_eval_silence(info);
138 #endif
139 if ((tty = info->tty)) {
140 if (info->mcr & UART_MCR_RTS) {
141 /* CISCO AsyncPPP Hack */
142 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
143 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
144 else
145 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
146 if (r)
147 tty_flip_buffer_push(tty);
148 } else
149 r = 1;
150 } else
151 r = 1;
152 if (r) {
153 info->rcvsched = 0;
154 resched = 1;
155 } else
156 info->rcvsched = 1;
157 }
158 }
159 }
160 if (!resched)
161 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
162 }
163
164 int
165 isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
166 {
167 ulong flags;
168 int midx;
169 #ifdef CONFIG_ISDN_AUDIO
170 int ifmt;
171 #endif
172 modem_info *info;
173
174 if ((midx = dev->m_idx[i]) < 0) {
175 /* if midx is invalid, packet is not for tty */
176 return 0;
177 }
178 info = &dev->mdm.info[midx];
179 #ifdef CONFIG_ISDN_AUDIO
180 ifmt = 1;
181
182 if ((info->vonline) && (!info->emu.vpar[4]))
183 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
184 if ((info->vonline & 1) && (info->emu.vpar[1]))
185 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
186 #endif
187 if ((info->online < 2)
188 #ifdef CONFIG_ISDN_AUDIO
189 && (!(info->vonline & 1))
190 #endif
191 ) {
192 /* If Modem not listening, drop data */
193 kfree_skb(skb);
194 return 1;
195 }
196 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
197 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
198 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
199 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
200 skb_pull(skb, 4);
201 else
202 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
203 skb_pull(skb, 2);
204 } else
205 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
206 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
207 skb_pull(skb, 4);
208 }
209 #ifdef CONFIG_ISDN_AUDIO
210 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
211 ISDN_AUDIO_SKB_LOCK(skb) = 0;
212 if (info->vonline & 1) {
213 /* voice conversion/compression */
214 switch (info->emu.vpar[3]) {
215 case 2:
216 case 3:
217 case 4:
218 /* adpcm
219 * Since compressed data takes less
220 * space, we can overwrite the buffer.
221 */
222 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
223 ifmt,
224 skb->data,
225 skb->data,
226 skb->len));
227 break;
228 case 5:
229 /* a-law */
230 if (!ifmt)
231 isdn_audio_ulaw2alaw(skb->data, skb->len);
232 break;
233 case 6:
234 /* u-law */
235 if (ifmt)
236 isdn_audio_alaw2ulaw(skb->data, skb->len);
237 break;
238 }
239 ISDN_AUDIO_SKB_DLECOUNT(skb) =
240 isdn_tty_countDLE(skb->data, skb->len);
241 }
242 #ifdef CONFIG_ISDN_TTY_FAX
243 else {
244 if (info->faxonline & 2) {
245 isdn_tty_fax_bitorder(info, skb);
246 ISDN_AUDIO_SKB_DLECOUNT(skb) =
247 isdn_tty_countDLE(skb->data, skb->len);
248 }
249 }
250 #endif
251 #endif
252 /* Try to deliver directly via tty-buf if queue is empty */
253 spin_lock_irqsave(&info->readlock, flags);
254 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
255 if (isdn_tty_try_read(info, skb)) {
256 spin_unlock_irqrestore(&info->readlock, flags);
257 return 1;
258 }
259 /* Direct deliver failed or queue wasn't empty.
260 * Queue up for later dequeueing via timer-irq.
261 */
262 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
263 dev->drv[di]->rcvcount[channel] +=
264 (skb->len
265 #ifdef CONFIG_ISDN_AUDIO
266 + ISDN_AUDIO_SKB_DLECOUNT(skb)
267 #endif
268 );
269 spin_unlock_irqrestore(&info->readlock, flags);
270 /* Schedule dequeuing */
271 if ((dev->modempoll) && (info->rcvsched))
272 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
273 return 1;
274 }
275
276 static void
277 isdn_tty_cleanup_xmit(modem_info * info)
278 {
279 skb_queue_purge(&info->xmit_queue);
280 #ifdef CONFIG_ISDN_AUDIO
281 skb_queue_purge(&info->dtmf_queue);
282 #endif
283 }
284
285 static void
286 isdn_tty_tint(modem_info * info)
287 {
288 struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
289 int len, slen;
290
291 if (!skb)
292 return;
293 len = skb->len;
294 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
295 info->isdn_channel, 1, skb)) == len) {
296 struct tty_struct *tty = info->tty;
297 info->send_outstanding++;
298 info->msr &= ~UART_MSR_CTS;
299 info->lsr &= ~UART_LSR_TEMT;
300 tty_wakeup(tty);
301 return;
302 }
303 if (slen < 0) {
304 /* Error: no channel, already shutdown, or wrong parameter */
305 dev_kfree_skb(skb);
306 return;
307 }
308 skb_queue_head(&info->xmit_queue, skb);
309 }
310
311 #ifdef CONFIG_ISDN_AUDIO
312 static int
313 isdn_tty_countDLE(unsigned char *buf, int len)
314 {
315 int count = 0;
316
317 while (len--)
318 if (*buf++ == DLE)
319 count++;
320 return count;
321 }
322
323 /* This routine is called from within isdn_tty_write() to perform
324 * DLE-decoding when sending audio-data.
325 */
326 static int
327 isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
328 {
329 unsigned char *p = &info->xmit_buf[info->xmit_count];
330 int count = 0;
331
332 while (len > 0) {
333 if (m->lastDLE) {
334 m->lastDLE = 0;
335 switch (*p) {
336 case DLE:
337 /* Escape code */
338 if (len > 1)
339 memmove(p, p + 1, len - 1);
340 p--;
341 count++;
342 break;
343 case ETX:
344 /* End of data */
345 info->vonline |= 4;
346 return count;
347 case DC4:
348 /* Abort RX */
349 info->vonline &= ~1;
350 #ifdef ISDN_DEBUG_MODEM_VOICE
351 printk(KERN_DEBUG
352 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
353 info->line);
354 #endif
355 isdn_tty_at_cout("\020\003", info);
356 if (!info->vonline) {
357 #ifdef ISDN_DEBUG_MODEM_VOICE
358 printk(KERN_DEBUG
359 "DLEdown: send VCON on ttyI%d\n",
360 info->line);
361 #endif
362 isdn_tty_at_cout("\r\nVCON\r\n", info);
363 }
364 /* Fall through */
365 case 'q':
366 case 's':
367 /* Silence */
368 if (len > 1)
369 memmove(p, p + 1, len - 1);
370 p--;
371 break;
372 }
373 } else {
374 if (*p == DLE)
375 m->lastDLE = 1;
376 else
377 count++;
378 }
379 p++;
380 len--;
381 }
382 if (len < 0) {
383 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
384 return 0;
385 }
386 return count;
387 }
388
389 /* This routine is called from within isdn_tty_write() when receiving
390 * audio-data. It interrupts receiving, if an character other than
391 * ^S or ^Q is sent.
392 */
393 static int
394 isdn_tty_end_vrx(const char *buf, int c)
395 {
396 char ch;
397
398 while (c--) {
399 ch = *buf;
400 if ((ch != 0x11) && (ch != 0x13))
401 return 1;
402 buf++;
403 }
404 return 0;
405 }
406
407 static int voice_cf[7] =
408 {0, 0, 4, 3, 2, 0, 0};
409
410 #endif /* CONFIG_ISDN_AUDIO */
411
412 /* isdn_tty_senddown() is called either directly from within isdn_tty_write()
413 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
414 * outgoing data from the tty's xmit-buffer, handles voice-decompression or
415 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
416 */
417 static void
418 isdn_tty_senddown(modem_info * info)
419 {
420 int buflen;
421 int skb_res;
422 #ifdef CONFIG_ISDN_AUDIO
423 int audio_len;
424 #endif
425 struct sk_buff *skb;
426
427 #ifdef CONFIG_ISDN_AUDIO
428 if (info->vonline & 4) {
429 info->vonline &= ~6;
430 if (!info->vonline) {
431 #ifdef ISDN_DEBUG_MODEM_VOICE
432 printk(KERN_DEBUG
433 "senddown: send VCON on ttyI%d\n",
434 info->line);
435 #endif
436 isdn_tty_at_cout("\r\nVCON\r\n", info);
437 }
438 }
439 #endif
440 if (!(buflen = info->xmit_count))
441 return;
442 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
443 info->msr &= ~UART_MSR_CTS;
444 info->lsr &= ~UART_LSR_TEMT;
445 /* info->xmit_count is modified here and in isdn_tty_write().
446 * So we return here if isdn_tty_write() is in the
447 * critical section.
448 */
449 atomic_inc(&info->xmit_lock);
450 if (!(atomic_dec_and_test(&info->xmit_lock)))
451 return;
452 if (info->isdn_driver < 0) {
453 info->xmit_count = 0;
454 return;
455 }
456 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
457 #ifdef CONFIG_ISDN_AUDIO
458 if (info->vonline & 2)
459 audio_len = buflen * voice_cf[info->emu.vpar[3]];
460 else
461 audio_len = 0;
462 skb = dev_alloc_skb(skb_res + buflen + audio_len);
463 #else
464 skb = dev_alloc_skb(skb_res + buflen);
465 #endif
466 if (!skb) {
467 printk(KERN_WARNING
468 "isdn_tty: Out of memory in ttyI%d senddown\n",
469 info->line);
470 return;
471 }
472 skb_reserve(skb, skb_res);
473 memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
474 info->xmit_count = 0;
475 #ifdef CONFIG_ISDN_AUDIO
476 if (info->vonline & 2) {
477 /* For now, ifmt is fixed to 1 (alaw), since this
478 * is used with ISDN everywhere in the world, except
479 * US, Canada and Japan.
480 * Later, when US-ISDN protocols are implemented,
481 * this setting will depend on the D-channel protocol.
482 */
483 int ifmt = 1;
484
485 /* voice conversion/decompression */
486 switch (info->emu.vpar[3]) {
487 case 2:
488 case 3:
489 case 4:
490 /* adpcm, compatible to ZyXel 1496 modem
491 * with ROM revision 6.01
492 */
493 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
494 ifmt,
495 skb->data,
496 skb_put(skb, audio_len),
497 buflen);
498 skb_pull(skb, buflen);
499 skb_trim(skb, audio_len);
500 break;
501 case 5:
502 /* a-law */
503 if (!ifmt)
504 isdn_audio_alaw2ulaw(skb->data,
505 buflen);
506 break;
507 case 6:
508 /* u-law */
509 if (ifmt)
510 isdn_audio_ulaw2alaw(skb->data,
511 buflen);
512 break;
513 }
514 }
515 #endif /* CONFIG_ISDN_AUDIO */
516 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
517 /* Add T.70 simplified header */
518 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
519 memcpy(skb_push(skb, 2), "\1\0", 2);
520 else
521 memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
522 }
523 skb_queue_tail(&info->xmit_queue, skb);
524 }
525
526 /************************************************************
527 *
528 * Modem-functions
529 *
530 * mostly "stolen" from original Linux-serial.c and friends.
531 *
532 ************************************************************/
533
534 /* The next routine is called once from within timer-interrupt
535 * triggered within isdn_tty_modem_ncarrier(). It calls
536 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
537 * into the tty's buffer.
538 */
539 static void
540 isdn_tty_modem_do_ncarrier(unsigned long data)
541 {
542 modem_info *info = (modem_info *) data;
543 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
544 }
545
546 /* Next routine is called, whenever the DTR-signal is raised.
547 * It checks the ncarrier-flag, and triggers the above routine
548 * when necessary. The ncarrier-flag is set, whenever DTR goes
549 * low.
550 */
551 static void
552 isdn_tty_modem_ncarrier(modem_info * info)
553 {
554 if (info->ncarrier) {
555 info->nc_timer.expires = jiffies + HZ;
556 add_timer(&info->nc_timer);
557 }
558 }
559
560 /*
561 * return the usage calculated by si and layer 2 protocol
562 */
563 static int
564 isdn_calc_usage(int si, int l2)
565 {
566 int usg = ISDN_USAGE_MODEM;
567
568 #ifdef CONFIG_ISDN_AUDIO
569 if (si == 1) {
570 switch(l2) {
571 case ISDN_PROTO_L2_MODEM:
572 usg = ISDN_USAGE_MODEM;
573 break;
574 #ifdef CONFIG_ISDN_TTY_FAX
575 case ISDN_PROTO_L2_FAX:
576 usg = ISDN_USAGE_FAX;
577 break;
578 #endif
579 case ISDN_PROTO_L2_TRANS:
580 default:
581 usg = ISDN_USAGE_VOICE;
582 break;
583 }
584 }
585 #endif
586 return(usg);
587 }
588
589 /* isdn_tty_dial() performs dialing of a tty an the necessary
590 * setup of the lower levels before that.
591 */
592 static void
593 isdn_tty_dial(char *n, modem_info * info, atemu * m)
594 {
595 int usg = ISDN_USAGE_MODEM;
596 int si = 7;
597 int l2 = m->mdmreg[REG_L2PROT];
598 u_long flags;
599 isdn_ctrl cmd;
600 int i;
601 int j;
602
603 for (j = 7; j >= 0; j--)
604 if (m->mdmreg[REG_SI1] & (1 << j)) {
605 si = bit2si[j];
606 break;
607 }
608 usg = isdn_calc_usage(si, l2);
609 #ifdef CONFIG_ISDN_AUDIO
610 if ((si == 1) &&
611 (l2 != ISDN_PROTO_L2_MODEM)
612 #ifdef CONFIG_ISDN_TTY_FAX
613 && (l2 != ISDN_PROTO_L2_FAX)
614 #endif
615 ) {
616 l2 = ISDN_PROTO_L2_TRANS;
617 usg = ISDN_USAGE_VOICE;
618 }
619 #endif
620 m->mdmreg[REG_SI1I] = si2bit[si];
621 spin_lock_irqsave(&dev->lock, flags);
622 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
623 if (i < 0) {
624 spin_unlock_irqrestore(&dev->lock, flags);
625 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
626 } else {
627 info->isdn_driver = dev->drvmap[i];
628 info->isdn_channel = dev->chanmap[i];
629 info->drv_index = i;
630 dev->m_idx[i] = info->line;
631 dev->usage[i] |= ISDN_USAGE_OUTGOING;
632 info->last_dir = 1;
633 strcpy(info->last_num, n);
634 isdn_info_update();
635 spin_unlock_irqrestore(&dev->lock, flags);
636 cmd.driver = info->isdn_driver;
637 cmd.arg = info->isdn_channel;
638 cmd.command = ISDN_CMD_CLREAZ;
639 isdn_command(&cmd);
640 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
641 cmd.driver = info->isdn_driver;
642 cmd.command = ISDN_CMD_SETEAZ;
643 isdn_command(&cmd);
644 cmd.driver = info->isdn_driver;
645 cmd.command = ISDN_CMD_SETL2;
646 info->last_l2 = l2;
647 cmd.arg = info->isdn_channel + (l2 << 8);
648 isdn_command(&cmd);
649 cmd.driver = info->isdn_driver;
650 cmd.command = ISDN_CMD_SETL3;
651 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
652 #ifdef CONFIG_ISDN_TTY_FAX
653 if (l2 == ISDN_PROTO_L2_FAX) {
654 cmd.parm.fax = info->fax;
655 info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
656 }
657 #endif
658 isdn_command(&cmd);
659 cmd.driver = info->isdn_driver;
660 cmd.arg = info->isdn_channel;
661 sprintf(cmd.parm.setup.phone, "%s", n);
662 sprintf(cmd.parm.setup.eazmsn, "%s",
663 isdn_map_eaz2msn(m->msn, info->isdn_driver));
664 cmd.parm.setup.si1 = si;
665 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
666 cmd.command = ISDN_CMD_DIAL;
667 info->dialing = 1;
668 info->emu.carrierwait = 0;
669 strcpy(dev->num[i], n);
670 isdn_info_update();
671 isdn_command(&cmd);
672 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
673 }
674 }
675
676 /* isdn_tty_hangup() disassociates a tty from the real
677 * ISDN-line (hangup). The usage-status is cleared
678 * and some cleanup is done also.
679 */
680 void
681 isdn_tty_modem_hup(modem_info * info, int local)
682 {
683 isdn_ctrl cmd;
684 int di, ch;
685
686 if (!info)
687 return;
688
689 di = info->isdn_driver;
690 ch = info->isdn_channel;
691 if (di < 0 || ch < 0)
692 return;
693
694 info->isdn_driver = -1;
695 info->isdn_channel = -1;
696
697 #ifdef ISDN_DEBUG_MODEM_HUP
698 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
699 #endif
700 info->rcvsched = 0;
701 isdn_tty_flush_buffer(info->tty);
702 if (info->online) {
703 info->last_lhup = local;
704 info->online = 0;
705 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
706 }
707 #ifdef CONFIG_ISDN_AUDIO
708 info->vonline = 0;
709 #ifdef CONFIG_ISDN_TTY_FAX
710 info->faxonline = 0;
711 info->fax->phase = ISDN_FAX_PHASE_IDLE;
712 #endif
713 info->emu.vpar[4] = 0;
714 info->emu.vpar[5] = 8;
715 kfree(info->dtmf_state);
716 info->dtmf_state = NULL;
717 kfree(info->silence_state);
718 info->silence_state = NULL;
719 kfree(info->adpcms);
720 info->adpcms = NULL;
721 kfree(info->adpcmr);
722 info->adpcmr = NULL;
723 #endif
724 if ((info->msr & UART_MSR_RI) &&
725 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
726 isdn_tty_modem_result(RESULT_RUNG, info);
727 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
728 info->lsr |= UART_LSR_TEMT;
729
730 if (local) {
731 cmd.driver = di;
732 cmd.command = ISDN_CMD_HANGUP;
733 cmd.arg = ch;
734 isdn_command(&cmd);
735 }
736
737 isdn_all_eaz(di, ch);
738 info->emu.mdmreg[REG_RINGCNT] = 0;
739 isdn_free_channel(di, ch, 0);
740
741 if (info->drv_index >= 0) {
742 dev->m_idx[info->drv_index] = -1;
743 info->drv_index = -1;
744 }
745 }
746
747 /*
748 * Begin of a CAPI like interface, currently used only for
749 * supplementary service (CAPI 2.0 part III)
750 */
751 #include <linux/isdn/capicmd.h>
752
753 int
754 isdn_tty_capi_facility(capi_msg *cm) {
755 return(-1); /* dummy */
756 }
757
758 /* isdn_tty_suspend() tries to suspend the current tty connection
759 */
760 static void
761 isdn_tty_suspend(char *id, modem_info * info, atemu * m)
762 {
763 isdn_ctrl cmd;
764
765 int l;
766
767 if (!info)
768 return;
769
770 #ifdef ISDN_DEBUG_MODEM_SERVICES
771 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
772 #endif
773 l = strlen(id);
774 if ((info->isdn_driver >= 0)) {
775 cmd.parm.cmsg.Length = l+18;
776 cmd.parm.cmsg.Command = CAPI_FACILITY;
777 cmd.parm.cmsg.Subcommand = CAPI_REQ;
778 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
779 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
780 cmd.parm.cmsg.para[1] = 0;
781 cmd.parm.cmsg.para[2] = l + 3;
782 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
783 cmd.parm.cmsg.para[4] = 0;
784 cmd.parm.cmsg.para[5] = l;
785 strncpy(&cmd.parm.cmsg.para[6], id, l);
786 cmd.command = CAPI_PUT_MESSAGE;
787 cmd.driver = info->isdn_driver;
788 cmd.arg = info->isdn_channel;
789 isdn_command(&cmd);
790 }
791 }
792
793 /* isdn_tty_resume() tries to resume a suspended call
794 * setup of the lower levels before that. unfortunatly here is no
795 * checking for compatibility of used protocols implemented by Q931
796 * It does the same things like isdn_tty_dial, the last command
797 * is different, may be we can merge it.
798 */
799
800 static void
801 isdn_tty_resume(char *id, modem_info * info, atemu * m)
802 {
803 int usg = ISDN_USAGE_MODEM;
804 int si = 7;
805 int l2 = m->mdmreg[REG_L2PROT];
806 isdn_ctrl cmd;
807 ulong flags;
808 int i;
809 int j;
810 int l;
811
812 l = strlen(id);
813 for (j = 7; j >= 0; j--)
814 if (m->mdmreg[REG_SI1] & (1 << j)) {
815 si = bit2si[j];
816 break;
817 }
818 usg = isdn_calc_usage(si, l2);
819 #ifdef CONFIG_ISDN_AUDIO
820 if ((si == 1) &&
821 (l2 != ISDN_PROTO_L2_MODEM)
822 #ifdef CONFIG_ISDN_TTY_FAX
823 && (l2 != ISDN_PROTO_L2_FAX)
824 #endif
825 ) {
826 l2 = ISDN_PROTO_L2_TRANS;
827 usg = ISDN_USAGE_VOICE;
828 }
829 #endif
830 m->mdmreg[REG_SI1I] = si2bit[si];
831 spin_lock_irqsave(&dev->lock, flags);
832 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
833 if (i < 0) {
834 spin_unlock_irqrestore(&dev->lock, flags);
835 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
836 } else {
837 info->isdn_driver = dev->drvmap[i];
838 info->isdn_channel = dev->chanmap[i];
839 info->drv_index = i;
840 dev->m_idx[i] = info->line;
841 dev->usage[i] |= ISDN_USAGE_OUTGOING;
842 info->last_dir = 1;
843 // strcpy(info->last_num, n);
844 isdn_info_update();
845 spin_unlock_irqrestore(&dev->lock, flags);
846 cmd.driver = info->isdn_driver;
847 cmd.arg = info->isdn_channel;
848 cmd.command = ISDN_CMD_CLREAZ;
849 isdn_command(&cmd);
850 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
851 cmd.driver = info->isdn_driver;
852 cmd.command = ISDN_CMD_SETEAZ;
853 isdn_command(&cmd);
854 cmd.driver = info->isdn_driver;
855 cmd.command = ISDN_CMD_SETL2;
856 info->last_l2 = l2;
857 cmd.arg = info->isdn_channel + (l2 << 8);
858 isdn_command(&cmd);
859 cmd.driver = info->isdn_driver;
860 cmd.command = ISDN_CMD_SETL3;
861 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
862 isdn_command(&cmd);
863 cmd.driver = info->isdn_driver;
864 cmd.arg = info->isdn_channel;
865 cmd.parm.cmsg.Length = l+18;
866 cmd.parm.cmsg.Command = CAPI_FACILITY;
867 cmd.parm.cmsg.Subcommand = CAPI_REQ;
868 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
869 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
870 cmd.parm.cmsg.para[1] = 0;
871 cmd.parm.cmsg.para[2] = l+3;
872 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
873 cmd.parm.cmsg.para[4] = 0;
874 cmd.parm.cmsg.para[5] = l;
875 strncpy(&cmd.parm.cmsg.para[6], id, l);
876 cmd.command =CAPI_PUT_MESSAGE;
877 info->dialing = 1;
878 // strcpy(dev->num[i], n);
879 isdn_info_update();
880 isdn_command(&cmd);
881 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
882 }
883 }
884
885 /* isdn_tty_send_msg() sends a message to a HL driver
886 * This is used for hybrid modem cards to send AT commands to it
887 */
888
889 static void
890 isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
891 {
892 int usg = ISDN_USAGE_MODEM;
893 int si = 7;
894 int l2 = m->mdmreg[REG_L2PROT];
895 isdn_ctrl cmd;
896 ulong flags;
897 int i;
898 int j;
899 int l;
900
901 l = strlen(msg);
902 if (!l) {
903 isdn_tty_modem_result(RESULT_ERROR, info);
904 return;
905 }
906 for (j = 7; j >= 0; j--)
907 if (m->mdmreg[REG_SI1] & (1 << j)) {
908 si = bit2si[j];
909 break;
910 }
911 usg = isdn_calc_usage(si, l2);
912 #ifdef CONFIG_ISDN_AUDIO
913 if ((si == 1) &&
914 (l2 != ISDN_PROTO_L2_MODEM)
915 #ifdef CONFIG_ISDN_TTY_FAX
916 && (l2 != ISDN_PROTO_L2_FAX)
917 #endif
918 ) {
919 l2 = ISDN_PROTO_L2_TRANS;
920 usg = ISDN_USAGE_VOICE;
921 }
922 #endif
923 m->mdmreg[REG_SI1I] = si2bit[si];
924 spin_lock_irqsave(&dev->lock, flags);
925 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
926 if (i < 0) {
927 spin_unlock_irqrestore(&dev->lock, flags);
928 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
929 } else {
930 info->isdn_driver = dev->drvmap[i];
931 info->isdn_channel = dev->chanmap[i];
932 info->drv_index = i;
933 dev->m_idx[i] = info->line;
934 dev->usage[i] |= ISDN_USAGE_OUTGOING;
935 info->last_dir = 1;
936 isdn_info_update();
937 spin_unlock_irqrestore(&dev->lock, flags);
938 cmd.driver = info->isdn_driver;
939 cmd.arg = info->isdn_channel;
940 cmd.command = ISDN_CMD_CLREAZ;
941 isdn_command(&cmd);
942 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
943 cmd.driver = info->isdn_driver;
944 cmd.command = ISDN_CMD_SETEAZ;
945 isdn_command(&cmd);
946 cmd.driver = info->isdn_driver;
947 cmd.command = ISDN_CMD_SETL2;
948 info->last_l2 = l2;
949 cmd.arg = info->isdn_channel + (l2 << 8);
950 isdn_command(&cmd);
951 cmd.driver = info->isdn_driver;
952 cmd.command = ISDN_CMD_SETL3;
953 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
954 isdn_command(&cmd);
955 cmd.driver = info->isdn_driver;
956 cmd.arg = info->isdn_channel;
957 cmd.parm.cmsg.Length = l+14;
958 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
959 cmd.parm.cmsg.Subcommand = CAPI_REQ;
960 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
961 cmd.parm.cmsg.para[0] = l+1;
962 strncpy(&cmd.parm.cmsg.para[1], msg, l);
963 cmd.parm.cmsg.para[l+1] = 0xd;
964 cmd.command =CAPI_PUT_MESSAGE;
965 /* info->dialing = 1;
966 strcpy(dev->num[i], n);
967 isdn_info_update();
968 */
969 isdn_command(&cmd);
970 }
971 }
972
973 static inline int
974 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
975 {
976 #ifdef MODEM_PARANOIA_CHECK
977 if (!info) {
978 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
979 name, routine);
980 return 1;
981 }
982 if (info->magic != ISDN_ASYNC_MAGIC) {
983 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
984 name, routine);
985 return 1;
986 }
987 #endif
988 return 0;
989 }
990
991 /*
992 * This routine is called to set the UART divisor registers to match
993 * the specified baud rate for a serial port.
994 */
995 static void
996 isdn_tty_change_speed(modem_info * info)
997 {
998 uint cflag,
999 cval,
1000 fcr,
1001 quot;
1002 int i;
1003
1004 if (!info->tty || !info->tty->termios)
1005 return;
1006 cflag = info->tty->termios->c_cflag;
1007
1008 quot = i = cflag & CBAUD;
1009 if (i & CBAUDEX) {
1010 i &= ~CBAUDEX;
1011 if (i < 1 || i > 2)
1012 info->tty->termios->c_cflag &= ~CBAUDEX;
1013 else
1014 i += 15;
1015 }
1016 if (quot) {
1017 info->mcr |= UART_MCR_DTR;
1018 isdn_tty_modem_ncarrier(info);
1019 } else {
1020 info->mcr &= ~UART_MCR_DTR;
1021 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1022 #ifdef ISDN_DEBUG_MODEM_HUP
1023 printk(KERN_DEBUG "Mhup in changespeed\n");
1024 #endif
1025 if (info->online)
1026 info->ncarrier = 1;
1027 isdn_tty_modem_reset_regs(info, 0);
1028 isdn_tty_modem_hup(info, 1);
1029 }
1030 return;
1031 }
1032 /* byte size and parity */
1033 cval = cflag & (CSIZE | CSTOPB);
1034 cval >>= 4;
1035 if (cflag & PARENB)
1036 cval |= UART_LCR_PARITY;
1037 if (!(cflag & PARODD))
1038 cval |= UART_LCR_EPAR;
1039 fcr = 0;
1040
1041 /* CTS flow control flag and modem status interrupts */
1042 if (cflag & CRTSCTS) {
1043 info->flags |= ISDN_ASYNC_CTS_FLOW;
1044 } else
1045 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1046 if (cflag & CLOCAL)
1047 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1048 else {
1049 info->flags |= ISDN_ASYNC_CHECK_CD;
1050 }
1051 }
1052
1053 static int
1054 isdn_tty_startup(modem_info * info)
1055 {
1056 if (info->flags & ISDN_ASYNC_INITIALIZED)
1057 return 0;
1058 isdn_lock_drivers();
1059 #ifdef ISDN_DEBUG_MODEM_OPEN
1060 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1061 #endif
1062 /*
1063 * Now, initialize the UART
1064 */
1065 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1066 if (info->tty)
1067 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1068 /*
1069 * and set the speed of the serial port
1070 */
1071 isdn_tty_change_speed(info);
1072
1073 info->flags |= ISDN_ASYNC_INITIALIZED;
1074 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1075 info->send_outstanding = 0;
1076 return 0;
1077 }
1078
1079 /*
1080 * This routine will shutdown a serial port; interrupts are disabled, and
1081 * DTR is dropped if the hangup on close termio flag is on.
1082 */
1083 static void
1084 isdn_tty_shutdown(modem_info * info)
1085 {
1086 if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1087 return;
1088 #ifdef ISDN_DEBUG_MODEM_OPEN
1089 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1090 #endif
1091 isdn_unlock_drivers();
1092 info->msr &= ~UART_MSR_RI;
1093 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1094 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1095 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1096 isdn_tty_modem_reset_regs(info, 0);
1097 #ifdef ISDN_DEBUG_MODEM_HUP
1098 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1099 #endif
1100 isdn_tty_modem_hup(info, 1);
1101 }
1102 }
1103 if (info->tty)
1104 set_bit(TTY_IO_ERROR, &info->tty->flags);
1105
1106 info->flags &= ~ISDN_ASYNC_INITIALIZED;
1107 }
1108
1109 /* isdn_tty_write() is the main send-routine. It is called from the upper
1110 * levels within the kernel to perform sending data. Depending on the
1111 * online-flag it either directs output to the at-command-interpreter or
1112 * to the lower level. Additional tasks done here:
1113 * - If online, check for escape-sequence (+++)
1114 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1115 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1116 * - If dialing, abort dial.
1117 */
1118 static int
1119 isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
1120 {
1121 int c;
1122 int total = 0;
1123 modem_info *info = (modem_info *) tty->driver_data;
1124 atemu *m = &info->emu;
1125
1126 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1127 return 0;
1128 /* See isdn_tty_senddown() */
1129 atomic_inc(&info->xmit_lock);
1130 while (1) {
1131 c = count;
1132 if (c > info->xmit_size - info->xmit_count)
1133 c = info->xmit_size - info->xmit_count;
1134 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1135 c = dev->drv[info->isdn_driver]->maxbufsize;
1136 if (c <= 0)
1137 break;
1138 if ((info->online > 1)
1139 #ifdef CONFIG_ISDN_AUDIO
1140 || (info->vonline & 3)
1141 #endif
1142 ) {
1143 #ifdef CONFIG_ISDN_AUDIO
1144 if (!info->vonline)
1145 #endif
1146 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1147 &(m->pluscount),
1148 &(m->lastplus));
1149 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1150 #ifdef CONFIG_ISDN_AUDIO
1151 if (info->vonline) {
1152 int cc = isdn_tty_handleDLEdown(info, m, c);
1153 if (info->vonline & 2) {
1154 if (!cc) {
1155 /* If DLE decoding results in zero-transmit, but
1156 * c originally was non-zero, do a wakeup.
1157 */
1158 tty_wakeup(tty);
1159 info->msr |= UART_MSR_CTS;
1160 info->lsr |= UART_LSR_TEMT;
1161 }
1162 info->xmit_count += cc;
1163 }
1164 if ((info->vonline & 3) == 1) {
1165 /* Do NOT handle Ctrl-Q or Ctrl-S
1166 * when in full-duplex audio mode.
1167 */
1168 if (isdn_tty_end_vrx(buf, c)) {
1169 info->vonline &= ~1;
1170 #ifdef ISDN_DEBUG_MODEM_VOICE
1171 printk(KERN_DEBUG
1172 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1173 info->line);
1174 #endif
1175 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1176 }
1177 }
1178 } else
1179 if (TTY_IS_FCLASS1(info)) {
1180 int cc = isdn_tty_handleDLEdown(info, m, c);
1181
1182 if (info->vonline & 4) { /* ETX seen */
1183 isdn_ctrl c;
1184
1185 c.command = ISDN_CMD_FAXCMD;
1186 c.driver = info->isdn_driver;
1187 c.arg = info->isdn_channel;
1188 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1189 c.parm.aux.subcmd = ETX;
1190 isdn_command(&c);
1191 }
1192 info->vonline = 0;
1193 #ifdef ISDN_DEBUG_MODEM_VOICE
1194 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1195 #endif
1196 info->xmit_count += cc;
1197 } else
1198 #endif
1199 info->xmit_count += c;
1200 } else {
1201 info->msr |= UART_MSR_CTS;
1202 info->lsr |= UART_LSR_TEMT;
1203 if (info->dialing) {
1204 info->dialing = 0;
1205 #ifdef ISDN_DEBUG_MODEM_HUP
1206 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1207 #endif
1208 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1209 isdn_tty_modem_hup(info, 1);
1210 } else
1211 c = isdn_tty_edit_at(buf, c, info);
1212 }
1213 buf += c;
1214 count -= c;
1215 total += c;
1216 }
1217 atomic_dec(&info->xmit_lock);
1218 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1219 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1220 isdn_tty_senddown(info);
1221 isdn_tty_tint(info);
1222 }
1223 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1224 }
1225 return total;
1226 }
1227
1228 static int
1229 isdn_tty_write_room(struct tty_struct *tty)
1230 {
1231 modem_info *info = (modem_info *) tty->driver_data;
1232 int ret;
1233
1234 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1235 return 0;
1236 if (!info->online)
1237 return info->xmit_size;
1238 ret = info->xmit_size - info->xmit_count;
1239 return (ret < 0) ? 0 : ret;
1240 }
1241
1242 static int
1243 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1244 {
1245 modem_info *info = (modem_info *) tty->driver_data;
1246
1247 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1248 return 0;
1249 if (!info->online)
1250 return 0;
1251 return (info->xmit_count);
1252 }
1253
1254 static void
1255 isdn_tty_flush_buffer(struct tty_struct *tty)
1256 {
1257 modem_info *info;
1258
1259 if (!tty) {
1260 return;
1261 }
1262 info = (modem_info *) tty->driver_data;
1263 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1264 return;
1265 }
1266 isdn_tty_cleanup_xmit(info);
1267 info->xmit_count = 0;
1268 tty_wakeup(tty);
1269 }
1270
1271 static void
1272 isdn_tty_flush_chars(struct tty_struct *tty)
1273 {
1274 modem_info *info = (modem_info *) tty->driver_data;
1275
1276 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1277 return;
1278 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1279 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1280 }
1281
1282 /*
1283 * ------------------------------------------------------------
1284 * isdn_tty_throttle()
1285 *
1286 * This routine is called by the upper-layer tty layer to signal that
1287 * incoming characters should be throttled.
1288 * ------------------------------------------------------------
1289 */
1290 static void
1291 isdn_tty_throttle(struct tty_struct *tty)
1292 {
1293 modem_info *info = (modem_info *) tty->driver_data;
1294
1295 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1296 return;
1297 if (I_IXOFF(tty))
1298 info->x_char = STOP_CHAR(tty);
1299 info->mcr &= ~UART_MCR_RTS;
1300 }
1301
1302 static void
1303 isdn_tty_unthrottle(struct tty_struct *tty)
1304 {
1305 modem_info *info = (modem_info *) tty->driver_data;
1306
1307 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1308 return;
1309 if (I_IXOFF(tty)) {
1310 if (info->x_char)
1311 info->x_char = 0;
1312 else
1313 info->x_char = START_CHAR(tty);
1314 }
1315 info->mcr |= UART_MCR_RTS;
1316 }
1317
1318 /*
1319 * ------------------------------------------------------------
1320 * isdn_tty_ioctl() and friends
1321 * ------------------------------------------------------------
1322 */
1323
1324 /*
1325 * isdn_tty_get_lsr_info - get line status register info
1326 *
1327 * Purpose: Let user call ioctl() to get info when the UART physically
1328 * is emptied. On bus types like RS485, the transmitter must
1329 * release the bus after transmitting. This must be done when
1330 * the transmit shift register is empty, not be done when the
1331 * transmit holding register is empty. This functionality
1332 * allows RS485 driver to be written in user space.
1333 */
1334 static int
1335 isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1336 {
1337 u_char status;
1338 uint result;
1339
1340 status = info->lsr;
1341 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1342 return put_user(result, value);
1343 }
1344
1345
1346 static int
1347 isdn_tty_tiocmget(struct tty_struct *tty, struct file *file)
1348 {
1349 modem_info *info = (modem_info *) tty->driver_data;
1350 u_char control, status;
1351
1352 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1353 return -ENODEV;
1354 if (tty->flags & (1 << TTY_IO_ERROR))
1355 return -EIO;
1356
1357 lock_kernel();
1358 #ifdef ISDN_DEBUG_MODEM_IOCTL
1359 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1360 #endif
1361
1362 control = info->mcr;
1363 status = info->msr;
1364 unlock_kernel();
1365 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1366 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1367 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1368 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1369 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1370 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1371 }
1372
1373 static int
1374 isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
1375 unsigned int set, unsigned int clear)
1376 {
1377 modem_info *info = (modem_info *) tty->driver_data;
1378
1379 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1380 return -ENODEV;
1381 if (tty->flags & (1 << TTY_IO_ERROR))
1382 return -EIO;
1383
1384 #ifdef ISDN_DEBUG_MODEM_IOCTL
1385 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1386 #endif
1387
1388 lock_kernel();
1389 if (set & TIOCM_RTS)
1390 info->mcr |= UART_MCR_RTS;
1391 if (set & TIOCM_DTR) {
1392 info->mcr |= UART_MCR_DTR;
1393 isdn_tty_modem_ncarrier(info);
1394 }
1395
1396 if (clear & TIOCM_RTS)
1397 info->mcr &= ~UART_MCR_RTS;
1398 if (clear & TIOCM_DTR) {
1399 info->mcr &= ~UART_MCR_DTR;
1400 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1401 isdn_tty_modem_reset_regs(info, 0);
1402 #ifdef ISDN_DEBUG_MODEM_HUP
1403 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1404 #endif
1405 if (info->online)
1406 info->ncarrier = 1;
1407 isdn_tty_modem_hup(info, 1);
1408 }
1409 }
1410 unlock_kernel();
1411 return 0;
1412 }
1413
1414 static int
1415 isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
1416 uint cmd, ulong arg)
1417 {
1418 modem_info *info = (modem_info *) tty->driver_data;
1419 int retval;
1420
1421 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1422 return -ENODEV;
1423 if (tty->flags & (1 << TTY_IO_ERROR))
1424 return -EIO;
1425 switch (cmd) {
1426 case TCSBRK: /* SVID version: non-zero arg --> no break */
1427 #ifdef ISDN_DEBUG_MODEM_IOCTL
1428 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1429 #endif
1430 retval = tty_check_change(tty);
1431 if (retval)
1432 return retval;
1433 tty_wait_until_sent(tty, 0);
1434 return 0;
1435 case TCSBRKP: /* support for POSIX tcsendbreak() */
1436 #ifdef ISDN_DEBUG_MODEM_IOCTL
1437 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1438 #endif
1439 retval = tty_check_change(tty);
1440 if (retval)
1441 return retval;
1442 tty_wait_until_sent(tty, 0);
1443 return 0;
1444 case TIOCSERGETLSR: /* Get line status register */
1445 #ifdef ISDN_DEBUG_MODEM_IOCTL
1446 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1447 #endif
1448 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1449 default:
1450 #ifdef ISDN_DEBUG_MODEM_IOCTL
1451 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1452 #endif
1453 return -ENOIOCTLCMD;
1454 }
1455 return 0;
1456 }
1457
1458 static void
1459 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1460 {
1461 modem_info *info = (modem_info *) tty->driver_data;
1462
1463 if (!old_termios)
1464 isdn_tty_change_speed(info);
1465 else {
1466 if (tty->termios->c_cflag == old_termios->c_cflag &&
1467 tty->termios->c_ispeed == old_termios->c_ispeed &&
1468 tty->termios->c_ospeed == old_termios->c_ospeed)
1469 return;
1470 isdn_tty_change_speed(info);
1471 if ((old_termios->c_cflag & CRTSCTS) &&
1472 !(tty->termios->c_cflag & CRTSCTS))
1473 tty->hw_stopped = 0;
1474 }
1475 }
1476
1477 /*
1478 * ------------------------------------------------------------
1479 * isdn_tty_open() and friends
1480 * ------------------------------------------------------------
1481 */
1482 static int
1483 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1484 {
1485 DECLARE_WAITQUEUE(wait, NULL);
1486 int do_clocal = 0;
1487 int retval;
1488
1489 /*
1490 * If the device is in the middle of being closed, then block
1491 * until it's done, and then try again.
1492 */
1493 if (tty_hung_up_p(filp) ||
1494 (info->flags & ISDN_ASYNC_CLOSING)) {
1495 if (info->flags & ISDN_ASYNC_CLOSING)
1496 interruptible_sleep_on(&info->close_wait);
1497 #ifdef MODEM_DO_RESTART
1498 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1499 return -EAGAIN;
1500 else
1501 return -ERESTARTSYS;
1502 #else
1503 return -EAGAIN;
1504 #endif
1505 }
1506 /*
1507 * If non-blocking mode is set, then make the check up front
1508 * and then exit.
1509 */
1510 if ((filp->f_flags & O_NONBLOCK) ||
1511 (tty->flags & (1 << TTY_IO_ERROR))) {
1512 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1513 return -EBUSY;
1514 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1515 return 0;
1516 }
1517 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1518 if (info->normal_termios.c_cflag & CLOCAL)
1519 do_clocal = 1;
1520 } else {
1521 if (tty->termios->c_cflag & CLOCAL)
1522 do_clocal = 1;
1523 }
1524 /*
1525 * Block waiting for the carrier detect and the line to become
1526 * free (i.e., not in use by the callout). While we are in
1527 * this loop, info->count is dropped by one, so that
1528 * isdn_tty_close() knows when to free things. We restore it upon
1529 * exit, either normal or abnormal.
1530 */
1531 retval = 0;
1532 add_wait_queue(&info->open_wait, &wait);
1533 #ifdef ISDN_DEBUG_MODEM_OPEN
1534 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1535 info->line, info->count);
1536 #endif
1537 if (!(tty_hung_up_p(filp)))
1538 info->count--;
1539 info->blocked_open++;
1540 while (1) {
1541 set_current_state(TASK_INTERRUPTIBLE);
1542 if (tty_hung_up_p(filp) ||
1543 !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1544 #ifdef MODEM_DO_RESTART
1545 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1546 retval = -EAGAIN;
1547 else
1548 retval = -ERESTARTSYS;
1549 #else
1550 retval = -EAGAIN;
1551 #endif
1552 break;
1553 }
1554 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1555 !(info->flags & ISDN_ASYNC_CLOSING) &&
1556 (do_clocal || (info->msr & UART_MSR_DCD))) {
1557 break;
1558 }
1559 if (signal_pending(current)) {
1560 retval = -ERESTARTSYS;
1561 break;
1562 }
1563 #ifdef ISDN_DEBUG_MODEM_OPEN
1564 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1565 info->line, info->count);
1566 #endif
1567 schedule();
1568 }
1569 current->state = TASK_RUNNING;
1570 remove_wait_queue(&info->open_wait, &wait);
1571 if (!tty_hung_up_p(filp))
1572 info->count++;
1573 info->blocked_open--;
1574 #ifdef ISDN_DEBUG_MODEM_OPEN
1575 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1576 info->line, info->count);
1577 #endif
1578 if (retval)
1579 return retval;
1580 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1581 return 0;
1582 }
1583
1584 /*
1585 * This routine is called whenever a serial port is opened. It
1586 * enables interrupts for a serial port, linking in its async structure into
1587 * the IRQ chain. It also performs the serial-specific
1588 * initialization for the tty structure.
1589 */
1590 static int
1591 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1592 {
1593 modem_info *info;
1594 int retval, line;
1595
1596 line = tty->index;
1597 if (line < 0 || line >= ISDN_MAX_CHANNELS)
1598 return -ENODEV;
1599 info = &dev->mdm.info[line];
1600 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1601 return -ENODEV;
1602 if (!try_module_get(info->owner)) {
1603 printk(KERN_WARNING "%s: cannot reserve module\n", __func__);
1604 return -ENODEV;
1605 }
1606 #ifdef ISDN_DEBUG_MODEM_OPEN
1607 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1608 info->count);
1609 #endif
1610 info->count++;
1611 tty->driver_data = info;
1612 info->tty = tty;
1613 /*
1614 * Start up serial port
1615 */
1616 retval = isdn_tty_startup(info);
1617 if (retval) {
1618 #ifdef ISDN_DEBUG_MODEM_OPEN
1619 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1620 #endif
1621 module_put(info->owner);
1622 return retval;
1623 }
1624 retval = isdn_tty_block_til_ready(tty, filp, info);
1625 if (retval) {
1626 #ifdef ISDN_DEBUG_MODEM_OPEN
1627 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1628 #endif
1629 module_put(info->owner);
1630 return retval;
1631 }
1632 #ifdef ISDN_DEBUG_MODEM_OPEN
1633 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1634 #endif
1635 dev->modempoll++;
1636 #ifdef ISDN_DEBUG_MODEM_OPEN
1637 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1638 #endif
1639 return 0;
1640 }
1641
1642 static void
1643 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1644 {
1645 modem_info *info = (modem_info *) tty->driver_data;
1646 ulong timeout;
1647
1648 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1649 return;
1650 if (tty_hung_up_p(filp)) {
1651 #ifdef ISDN_DEBUG_MODEM_OPEN
1652 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1653 #endif
1654 return;
1655 }
1656 if ((tty->count == 1) && (info->count != 1)) {
1657 /*
1658 * Uh, oh. tty->count is 1, which means that the tty
1659 * structure will be freed. Info->count should always
1660 * be one in these conditions. If it's greater than
1661 * one, we've got real problems, since it means the
1662 * serial port won't be shutdown.
1663 */
1664 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1665 "info->count is %d\n", info->count);
1666 info->count = 1;
1667 }
1668 if (--info->count < 0) {
1669 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1670 info->line, info->count);
1671 info->count = 0;
1672 }
1673 if (info->count) {
1674 #ifdef ISDN_DEBUG_MODEM_OPEN
1675 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1676 #endif
1677 module_put(info->owner);
1678 return;
1679 }
1680 info->flags |= ISDN_ASYNC_CLOSING;
1681 /*
1682 * Save the termios structure, since this port may have
1683 * separate termios for callout and dialin.
1684 */
1685 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1686 info->normal_termios = *tty->termios;
1687 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1688 info->callout_termios = *tty->termios;
1689
1690 tty->closing = 1;
1691 /*
1692 * At this point we stop accepting input. To do this, we
1693 * disable the receive line status interrupts, and tell the
1694 * interrupt driver to stop checking the data ready bit in the
1695 * line status register.
1696 */
1697 if (info->flags & ISDN_ASYNC_INITIALIZED) {
1698 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1699 /*
1700 * Before we drop DTR, make sure the UART transmitter
1701 * has completely drained; this is especially
1702 * important if there is a transmit FIFO!
1703 */
1704 timeout = jiffies + HZ;
1705 while (!(info->lsr & UART_LSR_TEMT)) {
1706 schedule_timeout_interruptible(20);
1707 if (time_after(jiffies,timeout))
1708 break;
1709 }
1710 }
1711 dev->modempoll--;
1712 isdn_tty_shutdown(info);
1713 isdn_tty_flush_buffer(tty);
1714 tty_ldisc_flush(tty);
1715 info->tty = NULL;
1716 info->ncarrier = 0;
1717 tty->closing = 0;
1718 module_put(info->owner);
1719 if (info->blocked_open) {
1720 msleep_interruptible(500);
1721 wake_up_interruptible(&info->open_wait);
1722 }
1723 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1724 wake_up_interruptible(&info->close_wait);
1725 #ifdef ISDN_DEBUG_MODEM_OPEN
1726 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1727 #endif
1728 }
1729
1730 /*
1731 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1732 */
1733 static void
1734 isdn_tty_hangup(struct tty_struct *tty)
1735 {
1736 modem_info *info = (modem_info *) tty->driver_data;
1737
1738 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1739 return;
1740 isdn_tty_shutdown(info);
1741 info->count = 0;
1742 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1743 info->tty = NULL;
1744 wake_up_interruptible(&info->open_wait);
1745 }
1746
1747 /* This routine initializes all emulator-data.
1748 */
1749 static void
1750 isdn_tty_reset_profile(atemu * m)
1751 {
1752 m->profile[0] = 0;
1753 m->profile[1] = 0;
1754 m->profile[2] = 43;
1755 m->profile[3] = 13;
1756 m->profile[4] = 10;
1757 m->profile[5] = 8;
1758 m->profile[6] = 3;
1759 m->profile[7] = 60;
1760 m->profile[8] = 2;
1761 m->profile[9] = 6;
1762 m->profile[10] = 7;
1763 m->profile[11] = 70;
1764 m->profile[12] = 0x45;
1765 m->profile[13] = 4;
1766 m->profile[14] = ISDN_PROTO_L2_X75I;
1767 m->profile[15] = ISDN_PROTO_L3_TRANS;
1768 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1769 m->profile[17] = ISDN_MODEM_WINSIZE;
1770 m->profile[18] = 4;
1771 m->profile[19] = 0;
1772 m->profile[20] = 0;
1773 m->profile[23] = 0;
1774 m->pmsn[0] = '\0';
1775 m->plmsn[0] = '\0';
1776 }
1777
1778 #ifdef CONFIG_ISDN_AUDIO
1779 static void
1780 isdn_tty_modem_reset_vpar(atemu * m)
1781 {
1782 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1783 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1784 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1785 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1786 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1787 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1788 }
1789 #endif
1790
1791 #ifdef CONFIG_ISDN_TTY_FAX
1792 static void
1793 isdn_tty_modem_reset_faxpar(modem_info * info)
1794 {
1795 T30_s *f = info->fax;
1796
1797 f->code = 0;
1798 f->phase = ISDN_FAX_PHASE_IDLE;
1799 f->direction = 0;
1800 f->resolution = 1; /* fine */
1801 f->rate = 5; /* 14400 bit/s */
1802 f->width = 0;
1803 f->length = 0;
1804 f->compression = 0;
1805 f->ecm = 0;
1806 f->binary = 0;
1807 f->scantime = 0;
1808 memset(&f->id[0], 32, FAXIDLEN - 1);
1809 f->id[FAXIDLEN - 1] = 0;
1810 f->badlin = 0;
1811 f->badmul = 0;
1812 f->bor = 0;
1813 f->nbc = 0;
1814 f->cq = 0;
1815 f->cr = 0;
1816 f->ctcrty = 0;
1817 f->minsp = 0;
1818 f->phcto = 30;
1819 f->rel = 0;
1820 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1821 f->pollid[FAXIDLEN - 1] = 0;
1822 }
1823 #endif
1824
1825 static void
1826 isdn_tty_modem_reset_regs(modem_info * info, int force)
1827 {
1828 atemu *m = &info->emu;
1829 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1830 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1831 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1832 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1833 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1834 }
1835 #ifdef CONFIG_ISDN_AUDIO
1836 isdn_tty_modem_reset_vpar(m);
1837 #endif
1838 #ifdef CONFIG_ISDN_TTY_FAX
1839 isdn_tty_modem_reset_faxpar(info);
1840 #endif
1841 m->mdmcmdl = 0;
1842 }
1843
1844 static void
1845 modem_write_profile(atemu * m)
1846 {
1847 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1848 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1849 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1850 if (dev->profd)
1851 send_sig(SIGIO, dev->profd, 1);
1852 }
1853
1854 static const struct tty_operations modem_ops = {
1855 .open = isdn_tty_open,
1856 .close = isdn_tty_close,
1857 .write = isdn_tty_write,
1858 .flush_chars = isdn_tty_flush_chars,
1859 .write_room = isdn_tty_write_room,
1860 .chars_in_buffer = isdn_tty_chars_in_buffer,
1861 .flush_buffer = isdn_tty_flush_buffer,
1862 .ioctl = isdn_tty_ioctl,
1863 .throttle = isdn_tty_throttle,
1864 .unthrottle = isdn_tty_unthrottle,
1865 .set_termios = isdn_tty_set_termios,
1866 .hangup = isdn_tty_hangup,
1867 .tiocmget = isdn_tty_tiocmget,
1868 .tiocmset = isdn_tty_tiocmset,
1869 };
1870
1871 int
1872 isdn_tty_modem_init(void)
1873 {
1874 isdn_modem_t *m;
1875 int i, retval;
1876 modem_info *info;
1877
1878 m = &dev->mdm;
1879 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1880 if (!m->tty_modem)
1881 return -ENOMEM;
1882 m->tty_modem->name = "ttyI";
1883 m->tty_modem->major = ISDN_TTY_MAJOR;
1884 m->tty_modem->minor_start = 0;
1885 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1886 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1887 m->tty_modem->init_termios = tty_std_termios;
1888 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1889 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1890 m->tty_modem->driver_name = "isdn_tty";
1891 tty_set_operations(m->tty_modem, &modem_ops);
1892 retval = tty_register_driver(m->tty_modem);
1893 if (retval) {
1894 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1895 goto err;
1896 }
1897 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1898 info = &m->info[i];
1899 #ifdef CONFIG_ISDN_TTY_FAX
1900 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1901 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1902 retval = -ENOMEM;
1903 goto err_unregister;
1904 }
1905 #endif
1906 #ifdef MODULE
1907 info->owner = THIS_MODULE;
1908 #endif
1909 spin_lock_init(&info->readlock);
1910 sprintf(info->last_cause, "0000");
1911 sprintf(info->last_num, "none");
1912 info->last_dir = 0;
1913 info->last_lhup = 1;
1914 info->last_l2 = -1;
1915 info->last_si = 0;
1916 isdn_tty_reset_profile(&info->emu);
1917 isdn_tty_modem_reset_regs(info, 1);
1918 info->magic = ISDN_ASYNC_MAGIC;
1919 info->line = i;
1920 info->tty = NULL;
1921 info->x_char = 0;
1922 info->count = 0;
1923 info->blocked_open = 0;
1924 init_waitqueue_head(&info->open_wait);
1925 init_waitqueue_head(&info->close_wait);
1926 info->isdn_driver = -1;
1927 info->isdn_channel = -1;
1928 info->drv_index = -1;
1929 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1930 init_timer(&info->nc_timer);
1931 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1932 info->nc_timer.data = (unsigned long) info;
1933 skb_queue_head_init(&info->xmit_queue);
1934 #ifdef CONFIG_ISDN_AUDIO
1935 skb_queue_head_init(&info->dtmf_queue);
1936 #endif
1937 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1938 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1939 retval = -ENOMEM;
1940 goto err_unregister;
1941 }
1942 /* Make room for T.70 header */
1943 info->xmit_buf += 4;
1944 }
1945 return 0;
1946 err_unregister:
1947 for (i--; i >= 0; i--) {
1948 info = &m->info[i];
1949 #ifdef CONFIG_ISDN_TTY_FAX
1950 kfree(info->fax);
1951 #endif
1952 kfree(info->xmit_buf - 4);
1953 }
1954 tty_unregister_driver(m->tty_modem);
1955 err:
1956 put_tty_driver(m->tty_modem);
1957 m->tty_modem = NULL;
1958 return retval;
1959 }
1960
1961 void
1962 isdn_tty_exit(void)
1963 {
1964 modem_info *info;
1965 int i;
1966
1967 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1968 info = &dev->mdm.info[i];
1969 isdn_tty_cleanup_xmit(info);
1970 #ifdef CONFIG_ISDN_TTY_FAX
1971 kfree(info->fax);
1972 #endif
1973 kfree(info->xmit_buf - 4);
1974 }
1975 tty_unregister_driver(dev->mdm.tty_modem);
1976 put_tty_driver(dev->mdm.tty_modem);
1977 dev->mdm.tty_modem = NULL;
1978 }
1979
1980
1981 /*
1982 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1983 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1984 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1985 */
1986
1987 static int
1988 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1989 {
1990 #ifdef ISDN_DEBUG_MODEM_ICALL
1991 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1992 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1993 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1994 #endif
1995 if (strlen(emu->lmsn)) {
1996 char *p = emu->lmsn;
1997 char *q;
1998 int tmp;
1999 int ret = 0;
2000
2001 while (1) {
2002 if ((q = strchr(p, ';')))
2003 *q = '\0';
2004 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2005 ret = tmp;
2006 #ifdef ISDN_DEBUG_MODEM_ICALL
2007 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2008 p, isdn_map_eaz2msn(emu->msn, di), tmp);
2009 #endif
2010 if (q) {
2011 *q = ';';
2012 p = q;
2013 p++;
2014 }
2015 if (!tmp)
2016 return 0;
2017 if (!q)
2018 break;
2019 }
2020 return ret;
2021 } else {
2022 int tmp;
2023 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2024 #ifdef ISDN_DEBUG_MODEM_ICALL
2025 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2026 isdn_map_eaz2msn(emu->msn, di), tmp);
2027 #endif
2028 return tmp;
2029 }
2030 }
2031
2032 /*
2033 * An incoming call-request has arrived.
2034 * Search the tty-devices for an appropriate device and bind
2035 * it to the ISDN-Channel.
2036 * Return:
2037 *
2038 * 0 = No matching device found.
2039 * 1 = A matching device found.
2040 * 3 = No match found, but eventually would match, if
2041 * CID is longer.
2042 */
2043 int
2044 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2045 {
2046 char *eaz;
2047 int i;
2048 int wret;
2049 int idx;
2050 int si1;
2051 int si2;
2052 char *nr;
2053 ulong flags;
2054
2055 if (!setup->phone[0]) {
2056 nr = "0";
2057 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2058 } else
2059 nr = setup->phone;
2060 si1 = (int) setup->si1;
2061 si2 = (int) setup->si2;
2062 if (!setup->eazmsn[0]) {
2063 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2064 eaz = "0";
2065 } else
2066 eaz = setup->eazmsn;
2067 #ifdef ISDN_DEBUG_MODEM_ICALL
2068 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2069 #endif
2070 wret = 0;
2071 spin_lock_irqsave(&dev->lock, flags);
2072 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2073 modem_info *info = &dev->mdm.info[i];
2074
2075 if (info->count == 0)
2076 continue;
2077 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
2078 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
2079 idx = isdn_dc2minor(di, ch);
2080 #ifdef ISDN_DEBUG_MODEM_ICALL
2081 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2082 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2083 info->flags, info->isdn_driver, info->isdn_channel,
2084 dev->usage[idx]);
2085 #endif
2086 if (
2087 #ifndef FIX_FILE_TRANSFER
2088 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2089 #endif
2090 (info->isdn_driver == -1) &&
2091 (info->isdn_channel == -1) &&
2092 (USG_NONE(dev->usage[idx]))) {
2093 int matchret;
2094
2095 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2096 wret = matchret;
2097 if (!matchret) { /* EAZ is matching */
2098 info->isdn_driver = di;
2099 info->isdn_channel = ch;
2100 info->drv_index = idx;
2101 dev->m_idx[idx] = info->line;
2102 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2103 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2104 strcpy(dev->num[idx], nr);
2105 strcpy(info->emu.cpn, eaz);
2106 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2107 info->emu.mdmreg[REG_PLAN] = setup->plan;
2108 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2109 isdn_info_update();
2110 spin_unlock_irqrestore(&dev->lock, flags);
2111 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2112 info->line);
2113 info->msr |= UART_MSR_RI;
2114 isdn_tty_modem_result(RESULT_RING, info);
2115 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2116 return 1;
2117 }
2118 }
2119 }
2120 }
2121 spin_unlock_irqrestore(&dev->lock, flags);
2122 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2123 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2124 return (wret == 2)?3:0;
2125 }
2126
2127 #define TTY_IS_ACTIVE(info) \
2128 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2129
2130 int
2131 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2132 {
2133 int mi;
2134 modem_info *info;
2135 char *e;
2136
2137 if (i < 0)
2138 return 0;
2139 if ((mi = dev->m_idx[i]) >= 0) {
2140 info = &dev->mdm.info[mi];
2141 switch (c->command) {
2142 case ISDN_STAT_CINF:
2143 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2144 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2145 if (e == (char *)c->parm.num)
2146 info->emu.charge = 0;
2147
2148 break;
2149 case ISDN_STAT_BSENT:
2150 #ifdef ISDN_TTY_STAT_DEBUG
2151 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2152 #endif
2153 if ((info->isdn_driver == c->driver) &&
2154 (info->isdn_channel == c->arg)) {
2155 info->msr |= UART_MSR_CTS;
2156 if (info->send_outstanding)
2157 if (!(--info->send_outstanding))
2158 info->lsr |= UART_LSR_TEMT;
2159 isdn_tty_tint(info);
2160 return 1;
2161 }
2162 break;
2163 case ISDN_STAT_CAUSE:
2164 #ifdef ISDN_TTY_STAT_DEBUG
2165 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2166 #endif
2167 /* Signal cause to tty-device */
2168 strncpy(info->last_cause, c->parm.num, 5);
2169 return 1;
2170 case ISDN_STAT_DISPLAY:
2171 #ifdef ISDN_TTY_STAT_DEBUG
2172 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2173 #endif
2174 /* Signal display to tty-device */
2175 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2176 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2177 isdn_tty_at_cout("\r\n", info);
2178 isdn_tty_at_cout("DISPLAY: ", info);
2179 isdn_tty_at_cout(c->parm.display, info);
2180 isdn_tty_at_cout("\r\n", info);
2181 }
2182 return 1;
2183 case ISDN_STAT_DCONN:
2184 #ifdef ISDN_TTY_STAT_DEBUG
2185 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2186 #endif
2187 if (TTY_IS_ACTIVE(info)) {
2188 if (info->dialing == 1) {
2189 info->dialing = 2;
2190 return 1;
2191 }
2192 }
2193 break;
2194 case ISDN_STAT_DHUP:
2195 #ifdef ISDN_TTY_STAT_DEBUG
2196 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2197 #endif
2198 if (TTY_IS_ACTIVE(info)) {
2199 if (info->dialing == 1)
2200 isdn_tty_modem_result(RESULT_BUSY, info);
2201 if (info->dialing > 1)
2202 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2203 info->dialing = 0;
2204 #ifdef ISDN_DEBUG_MODEM_HUP
2205 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2206 #endif
2207 isdn_tty_modem_hup(info, 0);
2208 return 1;
2209 }
2210 break;
2211 case ISDN_STAT_BCONN:
2212 #ifdef ISDN_TTY_STAT_DEBUG
2213 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2214 #endif
2215 /* Wake up any processes waiting
2216 * for incoming call of this device when
2217 * DCD follow the state of incoming carrier
2218 */
2219 if (info->blocked_open &&
2220 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2221 wake_up_interruptible(&info->open_wait);
2222 }
2223
2224 /* Schedule CONNECT-Message to any tty
2225 * waiting for it and
2226 * set DCD-bit of its modem-status.
2227 */
2228 if (TTY_IS_ACTIVE(info) ||
2229 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2230 info->msr |= UART_MSR_DCD;
2231 info->emu.charge = 0;
2232 if (info->dialing & 0xf)
2233 info->last_dir = 1;
2234 else
2235 info->last_dir = 0;
2236 info->dialing = 0;
2237 info->rcvsched = 1;
2238 if (USG_MODEM(dev->usage[i])) {
2239 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2240 strcpy(info->emu.connmsg, c->parm.num);
2241 isdn_tty_modem_result(RESULT_CONNECT, info);
2242 } else
2243 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2244 }
2245 if (USG_VOICE(dev->usage[i]))
2246 isdn_tty_modem_result(RESULT_VCON, info);
2247 return 1;
2248 }
2249 break;
2250 case ISDN_STAT_BHUP:
2251 #ifdef ISDN_TTY_STAT_DEBUG
2252 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2253 #endif
2254 if (TTY_IS_ACTIVE(info)) {
2255 #ifdef ISDN_DEBUG_MODEM_HUP
2256 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2257 #endif
2258 isdn_tty_modem_hup(info, 0);
2259 return 1;
2260 }
2261 break;
2262 case ISDN_STAT_NODCH:
2263 #ifdef ISDN_TTY_STAT_DEBUG
2264 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2265 #endif
2266 if (TTY_IS_ACTIVE(info)) {
2267 if (info->dialing) {
2268 info->dialing = 0;
2269 info->last_l2 = -1;
2270 info->last_si = 0;
2271 sprintf(info->last_cause, "0000");
2272 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2273 }
2274 isdn_tty_modem_hup(info, 0);
2275 return 1;
2276 }
2277 break;
2278 case ISDN_STAT_UNLOAD:
2279 #ifdef ISDN_TTY_STAT_DEBUG
2280 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2281 #endif
2282 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2283 info = &dev->mdm.info[i];
2284 if (info->isdn_driver == c->driver) {
2285 if (info->online)
2286 isdn_tty_modem_hup(info, 1);
2287 }
2288 }
2289 return 1;
2290 #ifdef CONFIG_ISDN_TTY_FAX
2291 case ISDN_STAT_FAXIND:
2292 if (TTY_IS_ACTIVE(info)) {
2293 isdn_tty_fax_command(info, c);
2294 }
2295 break;
2296 #endif
2297 #ifdef CONFIG_ISDN_AUDIO
2298 case ISDN_STAT_AUDIO:
2299 if (TTY_IS_ACTIVE(info)) {
2300 switch(c->parm.num[0]) {
2301 case ISDN_AUDIO_DTMF:
2302 if (info->vonline) {
2303 isdn_audio_put_dle_code(info,
2304 c->parm.num[1]);
2305 }
2306 break;
2307 }
2308 }
2309 break;
2310 #endif
2311 }
2312 }
2313 return 0;
2314 }
2315
2316 /*********************************************************************
2317 Modem-Emulator-Routines
2318 *********************************************************************/
2319
2320 #define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2321
2322 /*
2323 * Put a message from the AT-emulator into receive-buffer of tty,
2324 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2325 */
2326 void
2327 isdn_tty_at_cout(char *msg, modem_info * info)
2328 {
2329 struct tty_struct *tty;
2330 atemu *m = &info->emu;
2331 char *p;
2332 char c;
2333 u_long flags;
2334 struct sk_buff *skb = NULL;
2335 char *sp = NULL;
2336 int l;
2337
2338 if (!msg) {
2339 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2340 return;
2341 }
2342
2343 l = strlen(msg);
2344
2345 spin_lock_irqsave(&info->readlock, flags);
2346 tty = info->tty;
2347 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2348 spin_unlock_irqrestore(&info->readlock, flags);
2349 return;
2350 }
2351
2352 /* use queue instead of direct, if online and */
2353 /* data is in queue or buffer is full */
2354 if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2355 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2356 skb = alloc_skb(l, GFP_ATOMIC);
2357 if (!skb) {
2358 spin_unlock_irqrestore(&info->readlock, flags);
2359 return;
2360 }
2361 sp = skb_put(skb, l);
2362 #ifdef CONFIG_ISDN_AUDIO
2363 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2364 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2365 #endif
2366 }
2367
2368 for (p = msg; *p; p++) {
2369 switch (*p) {
2370 case '\r':
2371 c = m->mdmreg[REG_CR];
2372 break;
2373 case '\n':
2374 c = m->mdmreg[REG_LF];
2375 break;
2376 case '\b':
2377 c = m->mdmreg[REG_BS];
2378 break;
2379 default:
2380 c = *p;
2381 }
2382 if (skb) {
2383 *sp++ = c;
2384 } else {
2385 if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
2386 break;
2387 }
2388 }
2389 if (skb) {
2390 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2391 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2392 spin_unlock_irqrestore(&info->readlock, flags);
2393 /* Schedule dequeuing */
2394 if (dev->modempoll && info->rcvsched)
2395 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2396
2397 } else {
2398 spin_unlock_irqrestore(&info->readlock, flags);
2399 tty_flip_buffer_push(tty);
2400 }
2401 }
2402
2403 /*
2404 * Perform ATH Hangup
2405 */
2406 static void
2407 isdn_tty_on_hook(modem_info * info)
2408 {
2409 if (info->isdn_channel >= 0) {
2410 #ifdef ISDN_DEBUG_MODEM_HUP
2411 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2412 #endif
2413 isdn_tty_modem_hup(info, 1);
2414 }
2415 }
2416
2417 static void
2418 isdn_tty_off_hook(void)
2419 {
2420 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2421 }
2422
2423 #define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
2424 #define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
2425
2426 /*
2427 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2428 * isdn_tty_modem_escape() if sequence found.
2429 *
2430 * Parameters:
2431 * p pointer to databuffer
2432 * plus escape-character
2433 * count length of buffer
2434 * pluscount count of valid escape-characters so far
2435 * lastplus timestamp of last character
2436 */
2437 static void
2438 isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2439 u_long *lastplus)
2440 {
2441 if (plus > 127)
2442 return;
2443 if (count > 3) {
2444 p += count - 3;
2445 count = 3;
2446 *pluscount = 0;
2447 }
2448 while (count > 0) {
2449 if (*(p++) == plus) {
2450 if ((*pluscount)++) {
2451 /* Time since last '+' > 0.5 sec. ? */
2452 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2453 *pluscount = 1;
2454 } else {
2455 /* Time since last non-'+' < 1.5 sec. ? */
2456 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2457 *pluscount = 0;
2458 }
2459 if ((*pluscount == 3) && (count == 1))
2460 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2461 if (*pluscount > 3)
2462 *pluscount = 1;
2463 } else
2464 *pluscount = 0;
2465 *lastplus = jiffies;
2466 count--;
2467 }
2468 }
2469
2470 /*
2471 * Return result of AT-emulator to tty-receive-buffer, depending on
2472 * modem-register 12, bit 0 and 1.
2473 * For CONNECT-messages also switch to online-mode.
2474 * For RING-message handle auto-ATA if register 0 != 0
2475 */
2476
2477 static void
2478 isdn_tty_modem_result(int code, modem_info * info)
2479 {
2480 atemu *m = &info->emu;
2481 static char *msg[] =
2482 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2483 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2484 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2485 char s[ISDN_MSNLEN+10];
2486
2487 switch (code) {
2488 case RESULT_RING:
2489 m->mdmreg[REG_RINGCNT]++;
2490 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2491 /* Automatically accept incoming call */
2492 isdn_tty_cmd_ATA(info);
2493 break;
2494 case RESULT_NO_CARRIER:
2495 #ifdef ISDN_DEBUG_MODEM_HUP
2496 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2497 (info->flags & ISDN_ASYNC_CLOSING),
2498 (!info->tty));
2499 #endif
2500 m->mdmreg[REG_RINGCNT] = 0;
2501 del_timer(&info->nc_timer);
2502 info->ncarrier = 0;
2503 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2504 return;
2505 }
2506 #ifdef CONFIG_ISDN_AUDIO
2507 if (info->vonline & 1) {
2508 #ifdef ISDN_DEBUG_MODEM_VOICE
2509 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2510 info->line);
2511 #endif
2512 /* voice-recording, add DLE-ETX */
2513 isdn_tty_at_cout("\020\003", info);
2514 }
2515 if (info->vonline & 2) {
2516 #ifdef ISDN_DEBUG_MODEM_VOICE
2517 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2518 info->line);
2519 #endif
2520 /* voice-playing, add DLE-DC4 */
2521 isdn_tty_at_cout("\020\024", info);
2522 }
2523 #endif
2524 break;
2525 case RESULT_CONNECT:
2526 case RESULT_CONNECT64000:
2527 sprintf(info->last_cause, "0000");
2528 if (!info->online)
2529 info->online = 2;
2530 break;
2531 case RESULT_VCON:
2532 #ifdef ISDN_DEBUG_MODEM_VOICE
2533 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2534 info->line);
2535 #endif
2536 sprintf(info->last_cause, "0000");
2537 if (!info->online)
2538 info->online = 1;
2539 break;
2540 } /* switch(code) */
2541
2542 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2543 /* Show results */
2544 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2545 /* Show numeric results only */
2546 sprintf(s, "\r\n%d\r\n", code);
2547 isdn_tty_at_cout(s, info);
2548 } else {
2549 if (code == RESULT_RING) {
2550 /* return if "show RUNG" and ringcounter>1 */
2551 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2552 (m->mdmreg[REG_RINGCNT] > 1))
2553 return;
2554 /* print CID, _before_ _every_ ring */
2555 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2556 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2557 isdn_tty_at_cout(dev->num[info->drv_index], info);
2558 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2559 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2560 isdn_tty_at_cout(info->emu.cpn, info);
2561 }
2562 }
2563 }
2564 isdn_tty_at_cout("\r\n", info);
2565 isdn_tty_at_cout(msg[code], info);
2566 switch (code) {
2567 case RESULT_CONNECT:
2568 switch (m->mdmreg[REG_L2PROT]) {
2569 case ISDN_PROTO_L2_MODEM:
2570 isdn_tty_at_cout(" ", info);
2571 isdn_tty_at_cout(m->connmsg, info);
2572 break;
2573 }
2574 break;
2575 case RESULT_RING:
2576 /* Append CPN, if enabled */
2577 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2578 sprintf(s, "/%s", m->cpn);
2579 isdn_tty_at_cout(s, info);
2580 }
2581 /* Print CID only once, _after_ 1st RING */
2582 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2583 (m->mdmreg[REG_RINGCNT] == 1)) {
2584 isdn_tty_at_cout("\r\n", info);
2585 isdn_tty_at_cout("CALLER NUMBER: ", info);
2586 isdn_tty_at_cout(dev->num[info->drv_index], info);
2587 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2588 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2589 isdn_tty_at_cout(info->emu.cpn, info);
2590 }
2591 }
2592 break;
2593 case RESULT_NO_CARRIER:
2594 case RESULT_NO_DIALTONE:
2595 case RESULT_BUSY:
2596 case RESULT_NO_ANSWER:
2597 m->mdmreg[REG_RINGCNT] = 0;
2598 /* Append Cause-Message if enabled */
2599 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2600 sprintf(s, "/%s", info->last_cause);
2601 isdn_tty_at_cout(s, info);
2602 }
2603 break;
2604 case RESULT_CONNECT64000:
2605 /* Append Protocol to CONNECT message */
2606 switch (m->mdmreg[REG_L2PROT]) {
2607 case ISDN_PROTO_L2_X75I:
2608 case ISDN_PROTO_L2_X75UI:
2609 case ISDN_PROTO_L2_X75BUI:
2610 isdn_tty_at_cout("/X.75", info);
2611 break;
2612 case ISDN_PROTO_L2_HDLC:
2613 isdn_tty_at_cout("/HDLC", info);
2614 break;
2615 case ISDN_PROTO_L2_V11096:
2616 isdn_tty_at_cout("/V110/9600", info);
2617 break;
2618 case ISDN_PROTO_L2_V11019:
2619 isdn_tty_at_cout("/V110/19200", info);
2620 break;
2621 case ISDN_PROTO_L2_V11038:
2622 isdn_tty_at_cout("/V110/38400", info);
2623 break;
2624 }
2625 if (m->mdmreg[REG_T70] & BIT_T70) {
2626 isdn_tty_at_cout("/T.70", info);
2627 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2628 isdn_tty_at_cout("+", info);
2629 }
2630 break;
2631 }
2632 isdn_tty_at_cout("\r\n", info);
2633 }
2634 }
2635 if (code == RESULT_NO_CARRIER) {
2636 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2637 return;
2638 }
2639 #ifdef CONFIG_ISDN_AUDIO
2640 if ( !info->vonline )
2641 tty_ldisc_flush(info->tty);
2642 #else
2643 tty_ldisc_flush(info->tty);
2644 #endif
2645 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2646 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2647 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2648 tty_hangup(info->tty);
2649 }
2650 }
2651 }
2652
2653
2654 /*
2655 * Display a modem-register-value.
2656 */
2657 static void
2658 isdn_tty_show_profile(int ridx, modem_info * info)
2659 {
2660 char v[6];
2661
2662 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2663 isdn_tty_at_cout(v, info);
2664 }
2665
2666 /*
2667 * Get MSN-string from char-pointer, set pointer to end of number
2668 */
2669 static void
2670 isdn_tty_get_msnstr(char *n, char **p)
2671 {
2672 int limit = ISDN_MSNLEN - 1;
2673
2674 while (((*p[0] >= '0' && *p[0] <= '9') ||
2675 /* Why a comma ??? */
2676 (*p[0] == ',') || (*p[0] == ':')) &&
2677 (limit--))
2678 *n++ = *p[0]++;
2679 *n = '\0';
2680 }
2681
2682 /*
2683 * Get phone-number from modem-commandbuffer
2684 */
2685 static void
2686 isdn_tty_getdial(char *p, char *q,int cnt)
2687 {
2688 int first = 1;
2689 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2690 buffer overflow */
2691
2692 while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) {
2693 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2694 ((*p == 'R') && first) ||
2695 (*p == '*') || (*p == '#')) {
2696 *q++ = *p;
2697 limit--;
2698 }
2699 if(!limit)
2700 break;
2701 p++;
2702 first = 0;
2703 }
2704 *q = 0;
2705 }
2706
2707 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2708 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2709
2710 static void
2711 isdn_tty_report(modem_info * info)
2712 {
2713 atemu *m = &info->emu;
2714 char s[80];
2715
2716 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2717 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2718 isdn_tty_at_cout(s, info);
2719 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2720 isdn_tty_at_cout(s, info);
2721 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2722 switch (info->last_l2) {
2723 case ISDN_PROTO_L2_X75I:
2724 isdn_tty_at_cout("X.75i", info);
2725 break;
2726 case ISDN_PROTO_L2_X75UI:
2727 isdn_tty_at_cout("X.75ui", info);
2728 break;
2729 case ISDN_PROTO_L2_X75BUI:
2730 isdn_tty_at_cout("X.75bui", info);
2731 break;
2732 case ISDN_PROTO_L2_HDLC:
2733 isdn_tty_at_cout("HDLC", info);
2734 break;
2735 case ISDN_PROTO_L2_V11096:
2736 isdn_tty_at_cout("V.110 9600 Baud", info);
2737 break;
2738 case ISDN_PROTO_L2_V11019:
2739 isdn_tty_at_cout("V.110 19200 Baud", info);
2740 break;
2741 case ISDN_PROTO_L2_V11038:
2742 isdn_tty_at_cout("V.110 38400 Baud", info);
2743 break;
2744 case ISDN_PROTO_L2_TRANS:
2745 isdn_tty_at_cout("transparent", info);
2746 break;
2747 case ISDN_PROTO_L2_MODEM:
2748 isdn_tty_at_cout("modem", info);
2749 break;
2750 case ISDN_PROTO_L2_FAX:
2751 isdn_tty_at_cout("fax", info);
2752 break;
2753 default:
2754 isdn_tty_at_cout("unknown", info);
2755 break;
2756 }
2757 if (m->mdmreg[REG_T70] & BIT_T70) {
2758 isdn_tty_at_cout("/T.70", info);
2759 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2760 isdn_tty_at_cout("+", info);
2761 }
2762 isdn_tty_at_cout("\r\n", info);
2763 isdn_tty_at_cout(" Service: ", info);
2764 switch (info->last_si) {
2765 case 1:
2766 isdn_tty_at_cout("audio\r\n", info);
2767 break;
2768 case 5:
2769 isdn_tty_at_cout("btx\r\n", info);
2770 break;
2771 case 7:
2772 isdn_tty_at_cout("data\r\n", info);
2773 break;
2774 default:
2775 sprintf(s, "%d\r\n", info->last_si);
2776 isdn_tty_at_cout(s, info);
2777 break;
2778 }
2779 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2780 isdn_tty_at_cout(s, info);
2781 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2782 isdn_tty_at_cout(s, info);
2783 }
2784
2785 /*
2786 * Parse AT&.. commands.
2787 */
2788 static int
2789 isdn_tty_cmd_ATand(char **p, modem_info * info)
2790 {
2791 atemu *m = &info->emu;
2792 int i;
2793 char rb[100];
2794
2795 #define MAXRB (sizeof(rb) - 1)
2796
2797 switch (*p[0]) {
2798 case 'B':
2799 /* &B - Set Buffersize */
2800 p[0]++;
2801 i = isdn_getnum(p);
2802 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2803 PARSE_ERROR1;
2804 #ifdef CONFIG_ISDN_AUDIO
2805 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2806 PARSE_ERROR1;
2807 #endif
2808 m->mdmreg[REG_PSIZE] = i / 16;
2809 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2810 switch (m->mdmreg[REG_L2PROT]) {
2811 case ISDN_PROTO_L2_V11096:
2812 case ISDN_PROTO_L2_V11019:
2813 case ISDN_PROTO_L2_V11038:
2814 info->xmit_size /= 10;
2815 }
2816 break;
2817 case 'C':
2818 /* &C - DCD Status */
2819 p[0]++;
2820 switch (isdn_getnum(p)) {
2821 case 0:
2822 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2823 break;
2824 case 1:
2825 m->mdmreg[REG_DCD] |= BIT_DCD;
2826 break;
2827 default:
2828 PARSE_ERROR1
2829 }
2830 break;
2831 case 'D':
2832 /* &D - Set DTR-Low-behavior */
2833 p[0]++;
2834 switch (isdn_getnum(p)) {
2835 case 0:
2836 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2837 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2838 break;
2839 case 2:
2840 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2841 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2842 break;
2843 case 3:
2844 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2845 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2846 break;
2847 default:
2848 PARSE_ERROR1
2849 }
2850 break;
2851 case 'E':
2852 /* &E -Set EAZ/MSN */
2853 p[0]++;
2854 isdn_tty_get_msnstr(m->msn, p);
2855 break;
2856 case 'F':
2857 /* &F -Set Factory-Defaults */
2858 p[0]++;
2859 if (info->msr & UART_MSR_DCD)
2860 PARSE_ERROR1;
2861 isdn_tty_reset_profile(m);
2862 isdn_tty_modem_reset_regs(info, 1);
2863 break;
2864 #ifdef DUMMY_HAYES_AT
2865 case 'K':
2866 /* only for be compilant with common scripts */
2867 /* &K Flowcontrol - no function */
2868 p[0]++;
2869 isdn_getnum(p);
2870 break;
2871 #endif
2872 case 'L':
2873 /* &L -Set Numbers to listen on */
2874 p[0]++;
2875 i = 0;
2876 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2877 (i < ISDN_LMSNLEN - 1))
2878 m->lmsn[i++] = *p[0]++;
2879 m->lmsn[i] = '\0';
2880 break;
2881 case 'R':
2882 /* &R - Set V.110 bitrate adaption */
2883 p[0]++;
2884 i = isdn_getnum(p);
2885 switch (i) {
2886 case 0:
2887 /* Switch off V.110, back to X.75 */
2888 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2889 m->mdmreg[REG_SI2] = 0;
2890 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2891 break;
2892 case 9600:
2893 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2894 m->mdmreg[REG_SI2] = 197;
2895 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2896 break;
2897 case 19200:
2898 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2899 m->mdmreg[REG_SI2] = 199;
2900 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2901 break;
2902 case 38400:
2903 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2904 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2905 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2906 break;
2907 default:
2908 PARSE_ERROR1;
2909 }
2910 /* Switch off T.70 */
2911 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2912 /* Set Service 7 */
2913 m->mdmreg[REG_SI1] |= 4;
2914 break;
2915 case 'S':
2916 /* &S - Set Windowsize */
2917 p[0]++;
2918 i = isdn_getnum(p);
2919 if ((i > 0) && (i < 9))
2920 m->mdmreg[REG_WSIZE] = i;
2921 else
2922 PARSE_ERROR1;
2923 break;
2924 case 'V':
2925 /* &V - Show registers */
2926 p[0]++;
2927 isdn_tty_at_cout("\r\n", info);
2928 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2929 sprintf(rb, "S%02d=%03d%s", i,
2930 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2931 isdn_tty_at_cout(rb, info);
2932 }
2933 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2934 strlen(m->msn) ? m->msn : "None");
2935 isdn_tty_at_cout(rb, info);
2936 if (strlen(m->lmsn)) {
2937 isdn_tty_at_cout("\r\nListen: ", info);
2938 isdn_tty_at_cout(m->lmsn, info);
2939 isdn_tty_at_cout("\r\n", info);
2940 }
2941 break;
2942 case 'W':
2943 /* &W - Write Profile */
2944 p[0]++;
2945 switch (*p[0]) {
2946 case '0':
2947 p[0]++;
2948 modem_write_profile(m);
2949 break;
2950 default:
2951 PARSE_ERROR1;
2952 }
2953 break;
2954 case 'X':
2955 /* &X - Switch to BTX-Mode and T.70 */
2956 p[0]++;
2957 switch (isdn_getnum(p)) {
2958 case 0:
2959 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2960 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2961 break;
2962 case 1:
2963 m->mdmreg[REG_T70] |= BIT_T70;
2964 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2965 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2966 info->xmit_size = 112;
2967 m->mdmreg[REG_SI1] = 4;
2968 m->mdmreg[REG_SI2] = 0;
2969 break;
2970 case 2:
2971 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2972 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2973 info->xmit_size = 112;
2974 m->mdmreg[REG_SI1] = 4;
2975 m->mdmreg[REG_SI2] = 0;
2976 break;
2977 default:
2978 PARSE_ERROR1;
2979 }
2980 break;
2981 default:
2982 PARSE_ERROR1;
2983 }
2984 return 0;
2985 }
2986
2987 static int
2988 isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
2989 {
2990 /* Some plausibility checks */
2991 switch (mreg) {
2992 case REG_L2PROT:
2993 if (mval > ISDN_PROTO_L2_MAX)
2994 return 1;
2995 break;
2996 case REG_PSIZE:
2997 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2998 return 1;
2999 #ifdef CONFIG_ISDN_AUDIO
3000 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
3001 return 1;
3002 #endif
3003 info->xmit_size = mval * 16;
3004 switch (m->mdmreg[REG_L2PROT]) {
3005 case ISDN_PROTO_L2_V11096:
3006 case ISDN_PROTO_L2_V11019:
3007 case ISDN_PROTO_L2_V11038:
3008 info->xmit_size /= 10;
3009 }
3010 break;
3011 case REG_SI1I:
3012 case REG_PLAN:
3013 case REG_SCREEN:
3014 /* readonly registers */
3015 return 1;
3016 }
3017 return 0;
3018 }
3019
3020 /*
3021 * Perform ATS command
3022 */
3023 static int
3024 isdn_tty_cmd_ATS(char **p, modem_info * info)
3025 {
3026 atemu *m = &info->emu;
3027 int bitpos;
3028 int mreg;
3029 int mval;
3030 int bval;
3031
3032 mreg = isdn_getnum(p);
3033 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3034 PARSE_ERROR1;
3035 switch (*p[0]) {
3036 case '=':
3037 p[0]++;
3038 mval = isdn_getnum(p);
3039 if (mval < 0 || mval > 255)
3040 PARSE_ERROR1;
3041 if (isdn_tty_check_ats(mreg, mval, info, m))
3042 PARSE_ERROR1;
3043 m->mdmreg[mreg] = mval;
3044 break;
3045 case '.':
3046 /* Set/Clear a single bit */
3047 p[0]++;
3048 bitpos = isdn_getnum(p);
3049 if ((bitpos < 0) || (bitpos > 7))
3050 PARSE_ERROR1;
3051 switch (*p[0]) {
3052 case '=':
3053 p[0]++;
3054 bval = isdn_getnum(p);
3055 if (bval < 0 || bval > 1)
3056 PARSE_ERROR1;
3057 if (bval)
3058 mval = m->mdmreg[mreg] | (1 << bitpos);
3059 else
3060 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3061 if (isdn_tty_check_ats(mreg, mval, info, m))
3062 PARSE_ERROR1;
3063 m->mdmreg[mreg] = mval;
3064 break;
3065 case '?':
3066 p[0]++;
3067 isdn_tty_at_cout("\r\n", info);
3068 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3069 info);
3070 break;
3071 default:
3072 PARSE_ERROR1;
3073 }
3074 break;
3075 case '?':
3076 p[0]++;
3077 isdn_tty_show_profile(mreg, info);
3078 break;
3079 default:
3080 PARSE_ERROR1;
3081 break;
3082 }
3083 return 0;
3084 }
3085
3086 /*
3087 * Perform ATA command
3088 */
3089 static void
3090 isdn_tty_cmd_ATA(modem_info * info)
3091 {
3092 atemu *m = &info->emu;
3093 isdn_ctrl cmd;
3094 int l2;
3095
3096 if (info->msr & UART_MSR_RI) {
3097 /* Accept incoming call */
3098 info->last_dir = 0;
3099 strcpy(info->last_num, dev->num[info->drv_index]);
3100 m->mdmreg[REG_RINGCNT] = 0;
3101 info->msr &= ~UART_MSR_RI;
3102 l2 = m->mdmreg[REG_L2PROT];
3103 #ifdef CONFIG_ISDN_AUDIO
3104 /* If more than one bit set in reg18, autoselect Layer2 */
3105 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3106 if (m->mdmreg[REG_SI1I] == 1) {
3107 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3108 l2 = ISDN_PROTO_L2_TRANS;
3109 } else
3110 l2 = ISDN_PROTO_L2_X75I;
3111 }
3112 #endif
3113 cmd.driver = info->isdn_driver;
3114 cmd.command = ISDN_CMD_SETL2;
3115 cmd.arg = info->isdn_channel + (l2 << 8);
3116 info->last_l2 = l2;
3117 isdn_command(&cmd);
3118 cmd.driver = info->isdn_driver;
3119 cmd.command = ISDN_CMD_SETL3;
3120 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3121 #ifdef CONFIG_ISDN_TTY_FAX
3122 if (l2 == ISDN_PROTO_L2_FAX) {
3123 cmd.parm.fax = info->fax;
3124 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3125 }
3126 #endif
3127 isdn_command(&cmd);
3128 cmd.driver = info->isdn_driver;
3129 cmd.arg = info->isdn_channel;
3130 cmd.command = ISDN_CMD_ACCEPTD;
3131 info->dialing = 16;
3132 info->emu.carrierwait = 0;
3133 isdn_command(&cmd);
3134 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3135 } else
3136 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3137 }
3138
3139 #ifdef CONFIG_ISDN_AUDIO
3140 /*
3141 * Parse AT+F.. commands
3142 */
3143 static int
3144 isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3145 {
3146 atemu *m = &info->emu;
3147 char rs[20];
3148
3149 if (!strncmp(p[0], "CLASS", 5)) {
3150 p[0] += 5;
3151 switch (*p[0]) {
3152 case '?':
3153 p[0]++;
3154 sprintf(rs, "\r\n%d",
3155 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3156 #ifdef CONFIG_ISDN_TTY_FAX
3157 if (TTY_IS_FCLASS2(info))
3158 sprintf(rs, "\r\n2");
3159 else if (TTY_IS_FCLASS1(info))
3160 sprintf(rs, "\r\n1");
3161 #endif
3162 isdn_tty_at_cout(rs, info);
3163 break;
3164 case '=':
3165 p[0]++;
3166 switch (*p[0]) {
3167 case '0':
3168 p[0]++;
3169 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3170 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3171 m->mdmreg[REG_SI1] = 4;
3172 info->xmit_size =
3173 m->mdmreg[REG_PSIZE] * 16;
3174 break;
3175 #ifdef CONFIG_ISDN_TTY_FAX
3176 case '1':
3177 p[0]++;
3178 if (!(dev->global_features &
3179 ISDN_FEATURE_L3_FCLASS1))
3180 PARSE_ERROR1;
3181 m->mdmreg[REG_SI1] = 1;
3182 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3183 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3184 info->xmit_size =
3185 m->mdmreg[REG_PSIZE] * 16;
3186 break;
3187 case '2':
3188 p[0]++;
3189 if (!(dev->global_features &
3190 ISDN_FEATURE_L3_FCLASS2))
3191 PARSE_ERROR1;
3192 m->mdmreg[REG_SI1] = 1;
3193 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3194 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3195 info->xmit_size =
3196 m->mdmreg[REG_PSIZE] * 16;
3197 break;
3198 #endif
3199 case '8':
3200 p[0]++;
3201 /* L2 will change on dialout with si=1 */
3202 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3203 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3204 m->mdmreg[REG_SI1] = 5;
3205 info->xmit_size = VBUF;
3206 break;
3207 case '?':
3208 p[0]++;
3209 strcpy(rs, "\r\n0,");
3210 #ifdef CONFIG_ISDN_TTY_FAX
3211 if (dev->global_features &
3212 ISDN_FEATURE_L3_FCLASS1)
3213 strcat(rs, "1,");
3214 if (dev->global_features &
3215 ISDN_FEATURE_L3_FCLASS2)
3216 strcat(rs, "2,");
3217 #endif
3218 strcat(rs, "8");
3219 isdn_tty_at_cout(rs, info);
3220 break;
3221 default:
3222 PARSE_ERROR1;
3223 }
3224 break;
3225 default:
3226 PARSE_ERROR1;
3227 }
3228 return 0;
3229 }
3230 #ifdef CONFIG_ISDN_TTY_FAX
3231 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3232 #else
3233 PARSE_ERROR1;
3234 #endif
3235 }
3236
3237 /*
3238 * Parse AT+V.. commands
3239 */
3240 static int
3241 isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3242 {
3243 atemu *m = &info->emu;
3244 isdn_ctrl cmd;
3245 static char *vcmd[] =
3246 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3247 int i;
3248 int par1;
3249 int par2;
3250 char rs[20];
3251
3252 i = 0;
3253 while (vcmd[i]) {
3254 if (!strncmp(vcmd[i], p[0], 2)) {
3255 p[0] += 2;
3256 break;
3257 }
3258 i++;
3259 }
3260 switch (i) {
3261 case 0:
3262 /* AT+VNH - Auto hangup feature */
3263 switch (*p[0]) {
3264 case '?':
3265 p[0]++;
3266 isdn_tty_at_cout("\r\n1", info);
3267 break;
3268 case '=':
3269 p[0]++;
3270 switch (*p[0]) {
3271 case '1':
3272 p[0]++;
3273 break;
3274 case '?':
3275 p[0]++;
3276 isdn_tty_at_cout("\r\n1", info);
3277 break;
3278 default:
3279 PARSE_ERROR1;
3280 }
3281 break;
3282 default:
3283 PARSE_ERROR1;
3284 }
3285 break;
3286 case 1:
3287 /* AT+VIP - Reset all voice parameters */
3288 isdn_tty_modem_reset_vpar(m);
3289 break;
3290 case 2:
3291 /* AT+VLS - Select device, accept incoming call */
3292 switch (*p[0]) {
3293 case '?':
3294 p[0]++;
3295 sprintf(rs, "\r\n%d", m->vpar[0]);
3296 isdn_tty_at_cout(rs, info);
3297 break;
3298 case '=':
3299 p[0]++;
3300 switch (*p[0]) {
3301 case '0':
3302 p[0]++;
3303 m->vpar[0] = 0;
3304 break;
3305 case '2':
3306 p[0]++;
3307 m->vpar[0] = 2;
3308 break;
3309 case '?':
3310 p[0]++;
3311 isdn_tty_at_cout("\r\n0,2", info);
3312 break;
3313 default:
3314 PARSE_ERROR1;
3315 }
3316 break;
3317 default:
3318 PARSE_ERROR1;
3319 }
3320 break;
3321 case 3:
3322 /* AT+VRX - Start recording */
3323 if (!m->vpar[0])
3324 PARSE_ERROR1;
3325 if (info->online != 1) {
3326 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3327 return 1;
3328 }
3329 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3330 if (!info->dtmf_state) {
3331 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3332 PARSE_ERROR1;
3333 }
3334 info->silence_state = isdn_audio_silence_init(info->silence_state);
3335 if (!info->silence_state) {
3336 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3337 PARSE_ERROR1;
3338 }
3339 if (m->vpar[3] < 5) {
3340 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3341 if (!info->adpcmr) {
3342 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3343 PARSE_ERROR1;
3344 }
3345 }
3346 #ifdef ISDN_DEBUG_AT
3347 printk(KERN_DEBUG "AT: +VRX\n");
3348 #endif
3349 info->vonline |= 1;
3350 isdn_tty_modem_result(RESULT_CONNECT, info);
3351 return 0;
3352 break;
3353 case 4:
3354 /* AT+VSD - Silence detection */
3355 switch (*p[0]) {
3356 case '?':
3357 p[0]++;
3358 sprintf(rs, "\r\n<%d>,<%d>",
3359 m->vpar[1],
3360 m->vpar[2]);
3361 isdn_tty_at_cout(rs, info);
3362 break;
3363 case '=':
3364 p[0]++;
3365 if ((*p[0]>='0') && (*p[0]<='9')) {
3366 par1 = isdn_getnum(p);
3367 if ((par1 < 0) || (par1 > 31))
3368 PARSE_ERROR1;
3369 if (*p[0] != ',')
3370 PARSE_ERROR1;
3371 p[0]++;
3372 par2 = isdn_getnum(p);
3373 if ((par2 < 0) || (par2 > 255))
3374 PARSE_ERROR1;
3375 m->vpar[1] = par1;
3376 m->vpar[2] = par2;
3377 break;
3378 } else
3379 if (*p[0] == '?') {
3380 p[0]++;
3381 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3382 info);
3383 break;
3384 } else
3385 PARSE_ERROR1;
3386 break;
3387 default:
3388 PARSE_ERROR1;
3389 }
3390 break;
3391 case 5:
3392 /* AT+VSM - Select compression */
3393 switch (*p[0]) {
3394 case '?':
3395 p[0]++;
3396 sprintf(rs, "\r\n<%d>,<%d><8000>",
3397 m->vpar[3],
3398 m->vpar[1]);
3399 isdn_tty_at_cout(rs, info);
3400 break;
3401 case '=':
3402 p[0]++;
3403 switch (*p[0]) {
3404 case '2':
3405 case '3':
3406 case '4':
3407 case '5':
3408 case '6':
3409 par1 = isdn_getnum(p);
3410 if ((par1 < 2) || (par1 > 6))
3411 PARSE_ERROR1;
3412 m->vpar[3] = par1;
3413 break;
3414 case '?':
3415 p[0]++;
3416 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3417 info);
3418 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3419 info);
3420 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3421 info);
3422 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3423 info);
3424 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3425 info);
3426 break;
3427 default:
3428 PARSE_ERROR1;
3429 }
3430 break;
3431 default:
3432 PARSE_ERROR1;
3433 }
3434 break;
3435 case 6:
3436 /* AT+VTX - Start sending */
3437 if (!m->vpar[0])
3438 PARSE_ERROR1;
3439 if (info->online != 1) {
3440 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3441 return 1;
3442 }
3443 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3444 if (!info->dtmf_state) {
3445 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3446 PARSE_ERROR1;
3447 }
3448 if (m->vpar[3] < 5) {
3449 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3450 if (!info->adpcms) {
3451 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3452 PARSE_ERROR1;
3453 }
3454 }
3455 #ifdef ISDN_DEBUG_AT
3456 printk(KERN_DEBUG "AT: +VTX\n");
3457 #endif
3458 m->lastDLE = 0;
3459 info->vonline |= 2;
3460 isdn_tty_modem_result(RESULT_CONNECT, info);
3461 return 0;
3462 break;
3463 case 7:
3464 /* AT+VDD - DTMF detection */
3465 switch (*p[0]) {
3466 case '?':
3467 p[0]++;
3468 sprintf(rs, "\r\n<%d>,<%d>",
3469 m->vpar[4],
3470 m->vpar[5]);
3471 isdn_tty_at_cout(rs, info);
3472 break;
3473 case '=':
3474 p[0]++;
3475 if ((*p[0]>='0') && (*p[0]<='9')) {
3476 if (info->online != 1)
3477 PARSE_ERROR1;
3478 par1 = isdn_getnum(p);
3479 if ((par1 < 0) || (par1 > 15))
3480 PARSE_ERROR1;
3481 if (*p[0] != ',')
3482 PARSE_ERROR1;
3483 p[0]++;
3484 par2 = isdn_getnum(p);
3485 if ((par2 < 0) || (par2 > 255))
3486 PARSE_ERROR1;
3487 m->vpar[4] = par1;
3488 m->vpar[5] = par2;
3489 cmd.driver = info->isdn_driver;
3490 cmd.command = ISDN_CMD_AUDIO;
3491 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3492 cmd.parm.num[0] = par1;
3493 cmd.parm.num[1] = par2;
3494 isdn_command(&cmd);
3495 break;
3496 } else
3497 if (*p[0] == '?') {
3498 p[0]++;
3499 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3500 info);
3501 break;
3502 } else
3503 PARSE_ERROR1;
3504 break;
3505 default:
3506 PARSE_ERROR1;
3507 }
3508 break;
3509 default:
3510 PARSE_ERROR1;
3511 }
3512 return 0;
3513 }
3514 #endif /* CONFIG_ISDN_AUDIO */
3515
3516 /*
3517 * Parse and perform an AT-command-line.
3518 */
3519 static void
3520 isdn_tty_parse_at(modem_info * info)
3521 {
3522 atemu *m = &info->emu;
3523 char *p;
3524 char ds[40];
3525
3526 #ifdef ISDN_DEBUG_AT
3527 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3528 #endif
3529 for (p = &m->mdmcmd[2]; *p;) {
3530 switch (*p) {
3531 case ' ':
3532 p++;
3533 break;
3534 case 'A':
3535 /* A - Accept incoming call */
3536 p++;
3537 isdn_tty_cmd_ATA(info);
3538 return;
3539 break;
3540 case 'D':
3541 /* D - Dial */
3542 if (info->msr & UART_MSR_DCD)
3543 PARSE_ERROR;
3544 if (info->msr & UART_MSR_RI) {
3545 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3546 return;
3547 }
3548 isdn_tty_getdial(++p, ds, sizeof ds);
3549 p += strlen(p);
3550 if (!strlen(m->msn))
3551 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3552 else if (strlen(ds))
3553 isdn_tty_dial(ds, info, m);
3554 else
3555 PARSE_ERROR;
3556 return;
3557 case 'E':
3558 /* E - Turn Echo on/off */
3559 p++;
3560 switch (isdn_getnum(&p)) {
3561 case 0:
3562 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3563 break;
3564 case 1:
3565 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3566 break;
3567 default:
3568 PARSE_ERROR;
3569 }
3570 break;
3571 case 'H':
3572 /* H - On/Off-hook */
3573 p++;
3574 switch (*p) {
3575 case '0':
3576 p++;
3577 isdn_tty_on_hook(info);
3578 break;
3579 case '1':
3580 p++;
3581 isdn_tty_off_hook();
3582 break;
3583 default:
3584 isdn_tty_on_hook(info);
3585 break;
3586 }
3587 break;
3588 case 'I':
3589 /* I - Information */
3590 p++;
3591 isdn_tty_at_cout("\r\nLinux ISDN", info);
3592 switch (*p) {
3593 case '0':
3594 case '1':
3595 p++;
3596 break;
3597 case '2':
3598 p++;
3599 isdn_tty_report(info);
3600 break;
3601 case '3':
3602 p++;
3603 sprintf(ds, "\r\n%d", info->emu.charge);
3604 isdn_tty_at_cout(ds, info);
3605 break;
3606 default:;
3607 }
3608 break;
3609 #ifdef DUMMY_HAYES_AT
3610 case 'L':
3611 case 'M':
3612 /* only for be compilant with common scripts */
3613 /* no function */
3614 p++;
3615 isdn_getnum(&p);
3616 break;
3617 #endif
3618 case 'O':
3619 /* O - Go online */
3620 p++;
3621 if (info->msr & UART_MSR_DCD)
3622 /* if B-Channel is up */
3623 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3624 else
3625 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3626 return;
3627 case 'Q':
3628 /* Q - Turn Emulator messages on/off */
3629 p++;
3630 switch (isdn_getnum(&p)) {
3631 case 0:
3632 m->mdmreg[REG_RESP] |= BIT_RESP;
3633 break;
3634 case 1:
3635 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3636 break;
3637 default:
3638 PARSE_ERROR;
3639 }
3640 break;
3641 case 'S':
3642 /* S - Set/Get Register */
3643 p++;
3644 if (isdn_tty_cmd_ATS(&p, info))
3645 return;
3646 break;
3647 case 'V':
3648 /* V - Numeric or ASCII Emulator-messages */
3649 p++;
3650 switch (isdn_getnum(&p)) {
3651 case 0:
3652 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3653 break;
3654 case 1:
3655 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3656 break;
3657 default:
3658 PARSE_ERROR;
3659 }
3660 break;
3661 case 'Z':
3662 /* Z - Load Registers from Profile */
3663 p++;
3664 if (info->msr & UART_MSR_DCD) {
3665 info->online = 0;
3666 isdn_tty_on_hook(info);
3667 }
3668 isdn_tty_modem_reset_regs(info, 1);
3669 break;
3670 case '+':
3671 p++;
3672 switch (*p) {
3673 #ifdef CONFIG_ISDN_AUDIO
3674 case 'F':
3675 p++;
3676 if (isdn_tty_cmd_PLUSF(&p, info))
3677 return;
3678 break;
3679 case 'V':
3680 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3681 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3682 PARSE_ERROR;
3683 p++;
3684 if (isdn_tty_cmd_PLUSV(&p, info))
3685 return;
3686 break;
3687 #endif /* CONFIG_ISDN_AUDIO */
3688 case 'S': /* SUSPEND */
3689 p++;
3690 isdn_tty_get_msnstr(ds, &p);
3691 isdn_tty_suspend(ds, info, m);
3692 break;
3693 case 'R': /* RESUME */
3694 p++;
3695 isdn_tty_get_msnstr(ds, &p);
3696 isdn_tty_resume(ds, info, m);
3697 break;
3698 case 'M': /* MESSAGE */
3699 p++;
3700 isdn_tty_send_msg(info, m, p);
3701 break;
3702 default:
3703 PARSE_ERROR;
3704 }
3705 break;
3706 case '&':
3707 p++;
3708 if (isdn_tty_cmd_ATand(&p, info))
3709 return;
3710 break;
3711 default:
3712 PARSE_ERROR;
3713 }
3714 }
3715 #ifdef CONFIG_ISDN_AUDIO
3716 if (!info->vonline)
3717 #endif
3718 isdn_tty_modem_result(RESULT_OK, info);
3719 }
3720
3721 /* Need own toupper() because standard-toupper is not available
3722 * within modules.
3723 */
3724 #define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3725
3726 /*
3727 * Perform line-editing of AT-commands
3728 *
3729 * Parameters:
3730 * p inputbuffer
3731 * count length of buffer
3732 * channel index to line (minor-device)
3733 */
3734 static int
3735 isdn_tty_edit_at(const char *p, int count, modem_info * info)
3736 {
3737 atemu *m = &info->emu;
3738 int total = 0;
3739 u_char c;
3740 char eb[2];
3741 int cnt;
3742
3743 for (cnt = count; cnt > 0; p++, cnt--) {
3744 c = *p;
3745 total++;
3746 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3747 /* Separator (CR or LF) */
3748 m->mdmcmd[m->mdmcmdl] = 0;
3749 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3750 eb[0] = c;
3751 eb[1] = 0;
3752 isdn_tty_at_cout(eb, info);
3753 }
3754 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3755 isdn_tty_parse_at(info);
3756 m->mdmcmdl = 0;
3757 continue;
3758 }
3759 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3760 /* Backspace-Function */
3761 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3762 if (m->mdmcmdl)
3763 m->mdmcmdl--;
3764 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3765 isdn_tty_at_cout("\b", info);
3766 }
3767 continue;
3768 }
3769 if (cmdchar(c)) {
3770 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3771 eb[0] = c;
3772 eb[1] = 0;
3773 isdn_tty_at_cout(eb, info);
3774 }
3775 if (m->mdmcmdl < 255) {
3776 c = my_toupper(c);
3777 switch (m->mdmcmdl) {
3778 case 1:
3779 if (c == 'T') {
3780 m->mdmcmd[m->mdmcmdl] = c;
3781 m->mdmcmd[++m->mdmcmdl] = 0;
3782 break;
3783 } else
3784 m->mdmcmdl = 0;
3785 /* Fall through, check for 'A' */
3786 case 0:
3787 if (c == 'A') {
3788 m->mdmcmd[m->mdmcmdl] = c;
3789 m->mdmcmd[++m->mdmcmdl] = 0;
3790 }
3791 break;
3792 default:
3793 m->mdmcmd[m->mdmcmdl] = c;
3794 m->mdmcmd[++m->mdmcmdl] = 0;
3795 }
3796 }
3797 }
3798 }
3799 return total;
3800 }
3801
3802 /*
3803 * Switch all modem-channels who are online and got a valid
3804 * escape-sequence 1.5 seconds ago, to command-mode.
3805 * This function is called every second via timer-interrupt from within
3806 * timer-dispatcher isdn_timer_function()
3807 */
3808 void
3809 isdn_tty_modem_escape(void)
3810 {
3811 int ton = 0;
3812 int i;
3813 int midx;
3814
3815 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3816 if (USG_MODEM(dev->usage[i]))
3817 if ((midx = dev->m_idx[i]) >= 0) {
3818 modem_info *info = &dev->mdm.info[midx];
3819 if (info->online) {
3820 ton = 1;
3821 if ((info->emu.pluscount == 3) &&
3822 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3823 info->emu.pluscount = 0;
3824 info->online = 0;
3825 isdn_tty_modem_result(RESULT_OK, info);
3826 }
3827 }
3828 }
3829 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3830 }
3831
3832 /*
3833 * Put a RING-message to all modem-channels who have the RI-bit set.
3834 * This function is called every second via timer-interrupt from within
3835 * timer-dispatcher isdn_timer_function()
3836 */
3837 void
3838 isdn_tty_modem_ring(void)
3839 {
3840 int ton = 0;
3841 int i;
3842
3843 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3844 modem_info *info = &dev->mdm.info[i];
3845 if (info->msr & UART_MSR_RI) {
3846 ton = 1;
3847 isdn_tty_modem_result(RESULT_RING, info);
3848 }
3849 }
3850 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3851 }
3852
3853 /*
3854 * For all online tty's, try sending data to
3855 * the lower levels.
3856 */
3857 void
3858 isdn_tty_modem_xmit(void)
3859 {
3860 int ton = 1;
3861 int i;
3862
3863 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3864 modem_info *info = &dev->mdm.info[i];
3865 if (info->online) {
3866 ton = 1;
3867 isdn_tty_senddown(info);
3868 isdn_tty_tint(info);
3869 }
3870 }
3871 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3872 }
3873
3874 /*
3875 * Check all channels if we have a 'no carrier' timeout.
3876 * Timeout value is set by Register S7.
3877 */
3878 void
3879 isdn_tty_carrier_timeout(void)
3880 {
3881 int ton = 0;
3882 int i;
3883
3884 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3885 modem_info *info = &dev->mdm.info[i];
3886 if (info->dialing) {
3887 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3888 info->dialing = 0;
3889 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3890 isdn_tty_modem_hup(info, 1);
3891 }
3892 else
3893 ton = 1;
3894 }
3895 }
3896 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3897 }
kernel source for telekom puls (alcatel/mediatek)