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Merge master.kernel.org:/pub/scm/linux/kernel/git/tglx/mtd-2.6
[deliverable/linux.git] / drivers / isdn / i4l / isdn_tty.c
1 /* $Id: isdn_tty.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
2 *
3 * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
4 *
5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
7 *
8 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 */
12 #undef ISDN_TTY_STAT_DEBUG
13
14 #include <linux/config.h>
15 #include <linux/isdn.h>
16 #include <linux/delay.h>
17 #include "isdn_common.h"
18 #include "isdn_tty.h"
19 #ifdef CONFIG_ISDN_AUDIO
20 #include "isdn_audio.h"
21 #define VBUF 0x3e0
22 #define VBUFX (VBUF/16)
23 #endif
24
25 #define FIX_FILE_TRANSFER
26 #define DUMMY_HAYES_AT
27
28 /* Prototypes */
29
30 static int isdn_tty_edit_at(const char *, int, modem_info *);
31 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
32 static void isdn_tty_modem_reset_regs(modem_info *, int);
33 static void isdn_tty_cmd_ATA(modem_info *);
34 static void isdn_tty_flush_buffer(struct tty_struct *);
35 static void isdn_tty_modem_result(int, modem_info *);
36 #ifdef CONFIG_ISDN_AUDIO
37 static int isdn_tty_countDLE(unsigned char *, int);
38 #endif
39
40 /* Leave this unchanged unless you know what you do! */
41 #define MODEM_PARANOIA_CHECK
42 #define MODEM_DO_RESTART
43
44 static int bit2si[8] =
45 {1, 5, 7, 7, 7, 7, 7, 7};
46 static int si2bit[8] =
47 {4, 1, 4, 4, 4, 4, 4, 4};
48
49 char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
50
51
52 /* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
53 * to stuff incoming data directly into a tty's flip-buffer. This
54 * is done to speed up tty-receiving if the receive-queue is empty.
55 * This routine MUST be called with interrupts off.
56 * Return:
57 * 1 = Success
58 * 0 = Failure, data has to be buffered and later processed by
59 * isdn_tty_readmodem().
60 */
61 static int
62 isdn_tty_try_read(modem_info * info, struct sk_buff *skb)
63 {
64 int c;
65 int len;
66 struct tty_struct *tty;
67
68 if (info->online) {
69 if ((tty = info->tty)) {
70 if (info->mcr & UART_MCR_RTS) {
71 c = TTY_FLIPBUF_SIZE - tty->flip.count;
72 len = skb->len
73 #ifdef CONFIG_ISDN_AUDIO
74 + ISDN_AUDIO_SKB_DLECOUNT(skb)
75 #endif
76 ;
77 if (c >= len) {
78 #ifdef CONFIG_ISDN_AUDIO
79 if (ISDN_AUDIO_SKB_DLECOUNT(skb))
80 while (skb->len--) {
81 if (*skb->data == DLE)
82 tty_insert_flip_char(tty, DLE, 0);
83 tty_insert_flip_char(tty, *skb->data++, 0);
84 } else {
85 #endif
86 memcpy(tty->flip.char_buf_ptr,
87 skb->data, len);
88 tty->flip.count += len;
89 tty->flip.char_buf_ptr += len;
90 memset(tty->flip.flag_buf_ptr, 0, len);
91 tty->flip.flag_buf_ptr += len;
92 #ifdef CONFIG_ISDN_AUDIO
93 }
94 #endif
95 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
96 tty->flip.flag_buf_ptr[len - 1] = 0xff;
97 schedule_delayed_work(&tty->flip.work, 1);
98 kfree_skb(skb);
99 return 1;
100 }
101 }
102 }
103 }
104 return 0;
105 }
106
107 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
108 * It tries getting received data from the receive queue an stuff it into
109 * the tty's flip-buffer.
110 */
111 void
112 isdn_tty_readmodem(void)
113 {
114 int resched = 0;
115 int midx;
116 int i;
117 int c;
118 int r;
119 struct tty_struct *tty;
120 modem_info *info;
121
122 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
123 if ((midx = dev->m_idx[i]) >= 0) {
124 info = &dev->mdm.info[midx];
125 if (info->online) {
126 r = 0;
127 #ifdef CONFIG_ISDN_AUDIO
128 isdn_audio_eval_dtmf(info);
129 if ((info->vonline & 1) && (info->emu.vpar[1]))
130 isdn_audio_eval_silence(info);
131 #endif
132 if ((tty = info->tty)) {
133 if (info->mcr & UART_MCR_RTS) {
134 c = TTY_FLIPBUF_SIZE - tty->flip.count;
135 if (c > 0) {
136 r = isdn_readbchan(info->isdn_driver, info->isdn_channel,
137 tty->flip.char_buf_ptr,
138 tty->flip.flag_buf_ptr, c, NULL);
139 /* CISCO AsyncPPP Hack */
140 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
141 memset(tty->flip.flag_buf_ptr, 0, r);
142 tty->flip.count += r;
143 tty->flip.flag_buf_ptr += r;
144 tty->flip.char_buf_ptr += r;
145 if (r)
146 schedule_delayed_work(&tty->flip.work, 1);
147 }
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-flip-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 flip-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 wake_up_interruptible(&tty->write_wait);
1269 tty_wakeup(tty);
1270 }
1271
1272 static void
1273 isdn_tty_flush_chars(struct tty_struct *tty)
1274 {
1275 modem_info *info = (modem_info *) tty->driver_data;
1276
1277 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1278 return;
1279 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1280 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1281 }
1282
1283 /*
1284 * ------------------------------------------------------------
1285 * isdn_tty_throttle()
1286 *
1287 * This routine is called by the upper-layer tty layer to signal that
1288 * incoming characters should be throttled.
1289 * ------------------------------------------------------------
1290 */
1291 static void
1292 isdn_tty_throttle(struct tty_struct *tty)
1293 {
1294 modem_info *info = (modem_info *) tty->driver_data;
1295
1296 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1297 return;
1298 if (I_IXOFF(tty))
1299 info->x_char = STOP_CHAR(tty);
1300 info->mcr &= ~UART_MCR_RTS;
1301 }
1302
1303 static void
1304 isdn_tty_unthrottle(struct tty_struct *tty)
1305 {
1306 modem_info *info = (modem_info *) tty->driver_data;
1307
1308 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1309 return;
1310 if (I_IXOFF(tty)) {
1311 if (info->x_char)
1312 info->x_char = 0;
1313 else
1314 info->x_char = START_CHAR(tty);
1315 }
1316 info->mcr |= UART_MCR_RTS;
1317 }
1318
1319 /*
1320 * ------------------------------------------------------------
1321 * isdn_tty_ioctl() and friends
1322 * ------------------------------------------------------------
1323 */
1324
1325 /*
1326 * isdn_tty_get_lsr_info - get line status register info
1327 *
1328 * Purpose: Let user call ioctl() to get info when the UART physically
1329 * is emptied. On bus types like RS485, the transmitter must
1330 * release the bus after transmitting. This must be done when
1331 * the transmit shift register is empty, not be done when the
1332 * transmit holding register is empty. This functionality
1333 * allows RS485 driver to be written in user space.
1334 */
1335 static int
1336 isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1337 {
1338 u_char status;
1339 uint result;
1340
1341 status = info->lsr;
1342 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1343 return put_user(result, value);
1344 }
1345
1346
1347 static int
1348 isdn_tty_tiocmget(struct tty_struct *tty, struct file *file)
1349 {
1350 modem_info *info = (modem_info *) tty->driver_data;
1351 u_char control, status;
1352
1353 if (isdn_tty_paranoia_check(info, tty->name, __FUNCTION__))
1354 return -ENODEV;
1355 if (tty->flags & (1 << TTY_IO_ERROR))
1356 return -EIO;
1357
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 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1365 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1366 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1367 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1368 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1369 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1370 }
1371
1372 static int
1373 isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
1374 unsigned int set, unsigned int clear)
1375 {
1376 modem_info *info = (modem_info *) tty->driver_data;
1377
1378 if (isdn_tty_paranoia_check(info, tty->name, __FUNCTION__))
1379 return -ENODEV;
1380 if (tty->flags & (1 << TTY_IO_ERROR))
1381 return -EIO;
1382
1383 #ifdef ISDN_DEBUG_MODEM_IOCTL
1384 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1385 #endif
1386
1387 if (set & TIOCM_RTS)
1388 info->mcr |= UART_MCR_RTS;
1389 if (set & TIOCM_DTR) {
1390 info->mcr |= UART_MCR_DTR;
1391 isdn_tty_modem_ncarrier(info);
1392 }
1393
1394 if (clear & TIOCM_RTS)
1395 info->mcr &= ~UART_MCR_RTS;
1396 if (clear & TIOCM_DTR) {
1397 info->mcr &= ~UART_MCR_DTR;
1398 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1399 isdn_tty_modem_reset_regs(info, 0);
1400 #ifdef ISDN_DEBUG_MODEM_HUP
1401 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1402 #endif
1403 if (info->online)
1404 info->ncarrier = 1;
1405 isdn_tty_modem_hup(info, 1);
1406 }
1407 }
1408 return 0;
1409 }
1410
1411 static int
1412 isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
1413 uint cmd, ulong arg)
1414 {
1415 modem_info *info = (modem_info *) tty->driver_data;
1416 int retval;
1417
1418 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1419 return -ENODEV;
1420 if (tty->flags & (1 << TTY_IO_ERROR))
1421 return -EIO;
1422 switch (cmd) {
1423 case TCSBRK: /* SVID version: non-zero arg --> no break */
1424 #ifdef ISDN_DEBUG_MODEM_IOCTL
1425 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1426 #endif
1427 retval = tty_check_change(tty);
1428 if (retval)
1429 return retval;
1430 tty_wait_until_sent(tty, 0);
1431 return 0;
1432 case TCSBRKP: /* support for POSIX tcsendbreak() */
1433 #ifdef ISDN_DEBUG_MODEM_IOCTL
1434 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1435 #endif
1436 retval = tty_check_change(tty);
1437 if (retval)
1438 return retval;
1439 tty_wait_until_sent(tty, 0);
1440 return 0;
1441 case TIOCGSOFTCAR:
1442 #ifdef ISDN_DEBUG_MODEM_IOCTL
1443 printk(KERN_DEBUG "ttyI%d ioctl TIOCGSOFTCAR\n", info->line);
1444 #endif
1445 return put_user(C_CLOCAL(tty) ? 1 : 0, (ulong __user *) arg);
1446 case TIOCSSOFTCAR:
1447 #ifdef ISDN_DEBUG_MODEM_IOCTL
1448 printk(KERN_DEBUG "ttyI%d ioctl TIOCSSOFTCAR\n", info->line);
1449 #endif
1450 if (get_user(arg, (ulong __user *) arg))
1451 return -EFAULT;
1452 tty->termios->c_cflag =
1453 ((tty->termios->c_cflag & ~CLOCAL) |
1454 (arg ? CLOCAL : 0));
1455 return 0;
1456 case TIOCSERGETLSR: /* Get line status register */
1457 #ifdef ISDN_DEBUG_MODEM_IOCTL
1458 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1459 #endif
1460 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1461 default:
1462 #ifdef ISDN_DEBUG_MODEM_IOCTL
1463 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1464 #endif
1465 return -ENOIOCTLCMD;
1466 }
1467 return 0;
1468 }
1469
1470 static void
1471 isdn_tty_set_termios(struct tty_struct *tty, struct termios *old_termios)
1472 {
1473 modem_info *info = (modem_info *) tty->driver_data;
1474
1475 if (!old_termios)
1476 isdn_tty_change_speed(info);
1477 else {
1478 if (tty->termios->c_cflag == old_termios->c_cflag)
1479 return;
1480 isdn_tty_change_speed(info);
1481 if ((old_termios->c_cflag & CRTSCTS) &&
1482 !(tty->termios->c_cflag & CRTSCTS)) {
1483 tty->hw_stopped = 0;
1484 }
1485 }
1486 }
1487
1488 /*
1489 * ------------------------------------------------------------
1490 * isdn_tty_open() and friends
1491 * ------------------------------------------------------------
1492 */
1493 static int
1494 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1495 {
1496 DECLARE_WAITQUEUE(wait, NULL);
1497 int do_clocal = 0;
1498 int retval;
1499
1500 /*
1501 * If the device is in the middle of being closed, then block
1502 * until it's done, and then try again.
1503 */
1504 if (tty_hung_up_p(filp) ||
1505 (info->flags & ISDN_ASYNC_CLOSING)) {
1506 if (info->flags & ISDN_ASYNC_CLOSING)
1507 interruptible_sleep_on(&info->close_wait);
1508 #ifdef MODEM_DO_RESTART
1509 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1510 return -EAGAIN;
1511 else
1512 return -ERESTARTSYS;
1513 #else
1514 return -EAGAIN;
1515 #endif
1516 }
1517 /*
1518 * If non-blocking mode is set, then make the check up front
1519 * and then exit.
1520 */
1521 if ((filp->f_flags & O_NONBLOCK) ||
1522 (tty->flags & (1 << TTY_IO_ERROR))) {
1523 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1524 return -EBUSY;
1525 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1526 return 0;
1527 }
1528 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1529 if (info->normal_termios.c_cflag & CLOCAL)
1530 do_clocal = 1;
1531 } else {
1532 if (tty->termios->c_cflag & CLOCAL)
1533 do_clocal = 1;
1534 }
1535 /*
1536 * Block waiting for the carrier detect and the line to become
1537 * free (i.e., not in use by the callout). While we are in
1538 * this loop, info->count is dropped by one, so that
1539 * isdn_tty_close() knows when to free things. We restore it upon
1540 * exit, either normal or abnormal.
1541 */
1542 retval = 0;
1543 add_wait_queue(&info->open_wait, &wait);
1544 #ifdef ISDN_DEBUG_MODEM_OPEN
1545 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1546 info->line, info->count);
1547 #endif
1548 if (!(tty_hung_up_p(filp)))
1549 info->count--;
1550 info->blocked_open++;
1551 while (1) {
1552 set_current_state(TASK_INTERRUPTIBLE);
1553 if (tty_hung_up_p(filp) ||
1554 !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1555 #ifdef MODEM_DO_RESTART
1556 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1557 retval = -EAGAIN;
1558 else
1559 retval = -ERESTARTSYS;
1560 #else
1561 retval = -EAGAIN;
1562 #endif
1563 break;
1564 }
1565 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1566 !(info->flags & ISDN_ASYNC_CLOSING) &&
1567 (do_clocal || (info->msr & UART_MSR_DCD))) {
1568 break;
1569 }
1570 if (signal_pending(current)) {
1571 retval = -ERESTARTSYS;
1572 break;
1573 }
1574 #ifdef ISDN_DEBUG_MODEM_OPEN
1575 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1576 info->line, info->count);
1577 #endif
1578 schedule();
1579 }
1580 current->state = TASK_RUNNING;
1581 remove_wait_queue(&info->open_wait, &wait);
1582 if (!tty_hung_up_p(filp))
1583 info->count++;
1584 info->blocked_open--;
1585 #ifdef ISDN_DEBUG_MODEM_OPEN
1586 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1587 info->line, info->count);
1588 #endif
1589 if (retval)
1590 return retval;
1591 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1592 return 0;
1593 }
1594
1595 /*
1596 * This routine is called whenever a serial port is opened. It
1597 * enables interrupts for a serial port, linking in its async structure into
1598 * the IRQ chain. It also performs the serial-specific
1599 * initialization for the tty structure.
1600 */
1601 static int
1602 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1603 {
1604 modem_info *info;
1605 int retval, line;
1606
1607 line = tty->index;
1608 if (line < 0 || line > ISDN_MAX_CHANNELS)
1609 return -ENODEV;
1610 info = &dev->mdm.info[line];
1611 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1612 return -ENODEV;
1613 if (!try_module_get(info->owner)) {
1614 printk(KERN_WARNING "%s: cannot reserve module\n", __FUNCTION__);
1615 return -ENODEV;
1616 }
1617 #ifdef ISDN_DEBUG_MODEM_OPEN
1618 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1619 info->count);
1620 #endif
1621 info->count++;
1622 tty->driver_data = info;
1623 info->tty = tty;
1624 /*
1625 * Start up serial port
1626 */
1627 retval = isdn_tty_startup(info);
1628 if (retval) {
1629 #ifdef ISDN_DEBUG_MODEM_OPEN
1630 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1631 #endif
1632 module_put(info->owner);
1633 return retval;
1634 }
1635 retval = isdn_tty_block_til_ready(tty, filp, info);
1636 if (retval) {
1637 #ifdef ISDN_DEBUG_MODEM_OPEN
1638 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1639 #endif
1640 module_put(info->owner);
1641 return retval;
1642 }
1643 #ifdef ISDN_DEBUG_MODEM_OPEN
1644 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1645 #endif
1646 dev->modempoll++;
1647 #ifdef ISDN_DEBUG_MODEM_OPEN
1648 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1649 #endif
1650 return 0;
1651 }
1652
1653 static void
1654 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1655 {
1656 modem_info *info = (modem_info *) tty->driver_data;
1657 ulong timeout;
1658
1659 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1660 return;
1661 if (tty_hung_up_p(filp)) {
1662 #ifdef ISDN_DEBUG_MODEM_OPEN
1663 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1664 #endif
1665 return;
1666 }
1667 if ((tty->count == 1) && (info->count != 1)) {
1668 /*
1669 * Uh, oh. tty->count is 1, which means that the tty
1670 * structure will be freed. Info->count should always
1671 * be one in these conditions. If it's greater than
1672 * one, we've got real problems, since it means the
1673 * serial port won't be shutdown.
1674 */
1675 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1676 "info->count is %d\n", info->count);
1677 info->count = 1;
1678 }
1679 if (--info->count < 0) {
1680 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1681 info->line, info->count);
1682 info->count = 0;
1683 }
1684 if (info->count) {
1685 #ifdef ISDN_DEBUG_MODEM_OPEN
1686 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1687 #endif
1688 return;
1689 }
1690 info->flags |= ISDN_ASYNC_CLOSING;
1691 /*
1692 * Save the termios structure, since this port may have
1693 * separate termios for callout and dialin.
1694 */
1695 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1696 info->normal_termios = *tty->termios;
1697 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1698 info->callout_termios = *tty->termios;
1699
1700 tty->closing = 1;
1701 /*
1702 * At this point we stop accepting input. To do this, we
1703 * disable the receive line status interrupts, and tell the
1704 * interrupt driver to stop checking the data ready bit in the
1705 * line status register.
1706 */
1707 if (info->flags & ISDN_ASYNC_INITIALIZED) {
1708 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1709 /*
1710 * Before we drop DTR, make sure the UART transmitter
1711 * has completely drained; this is especially
1712 * important if there is a transmit FIFO!
1713 */
1714 timeout = jiffies + HZ;
1715 while (!(info->lsr & UART_LSR_TEMT)) {
1716 schedule_timeout_interruptible(20);
1717 if (time_after(jiffies,timeout))
1718 break;
1719 }
1720 }
1721 dev->modempoll--;
1722 isdn_tty_shutdown(info);
1723
1724 if (tty->driver->flush_buffer)
1725 tty->driver->flush_buffer(tty);
1726 tty_ldisc_flush(tty);
1727 info->tty = NULL;
1728 info->ncarrier = 0;
1729 tty->closing = 0;
1730 module_put(info->owner);
1731 if (info->blocked_open) {
1732 msleep_interruptible(500);
1733 wake_up_interruptible(&info->open_wait);
1734 }
1735 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1736 wake_up_interruptible(&info->close_wait);
1737 #ifdef ISDN_DEBUG_MODEM_OPEN
1738 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1739 #endif
1740 }
1741
1742 /*
1743 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1744 */
1745 static void
1746 isdn_tty_hangup(struct tty_struct *tty)
1747 {
1748 modem_info *info = (modem_info *) tty->driver_data;
1749
1750 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1751 return;
1752 isdn_tty_shutdown(info);
1753 info->count = 0;
1754 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1755 info->tty = NULL;
1756 wake_up_interruptible(&info->open_wait);
1757 }
1758
1759 /* This routine initializes all emulator-data.
1760 */
1761 static void
1762 isdn_tty_reset_profile(atemu * m)
1763 {
1764 m->profile[0] = 0;
1765 m->profile[1] = 0;
1766 m->profile[2] = 43;
1767 m->profile[3] = 13;
1768 m->profile[4] = 10;
1769 m->profile[5] = 8;
1770 m->profile[6] = 3;
1771 m->profile[7] = 60;
1772 m->profile[8] = 2;
1773 m->profile[9] = 6;
1774 m->profile[10] = 7;
1775 m->profile[11] = 70;
1776 m->profile[12] = 0x45;
1777 m->profile[13] = 4;
1778 m->profile[14] = ISDN_PROTO_L2_X75I;
1779 m->profile[15] = ISDN_PROTO_L3_TRANS;
1780 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1781 m->profile[17] = ISDN_MODEM_WINSIZE;
1782 m->profile[18] = 4;
1783 m->profile[19] = 0;
1784 m->profile[20] = 0;
1785 m->profile[23] = 0;
1786 m->pmsn[0] = '\0';
1787 m->plmsn[0] = '\0';
1788 }
1789
1790 #ifdef CONFIG_ISDN_AUDIO
1791 static void
1792 isdn_tty_modem_reset_vpar(atemu * m)
1793 {
1794 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1795 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1796 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1797 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1798 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1799 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1800 }
1801 #endif
1802
1803 #ifdef CONFIG_ISDN_TTY_FAX
1804 static void
1805 isdn_tty_modem_reset_faxpar(modem_info * info)
1806 {
1807 T30_s *f = info->fax;
1808
1809 f->code = 0;
1810 f->phase = ISDN_FAX_PHASE_IDLE;
1811 f->direction = 0;
1812 f->resolution = 1; /* fine */
1813 f->rate = 5; /* 14400 bit/s */
1814 f->width = 0;
1815 f->length = 0;
1816 f->compression = 0;
1817 f->ecm = 0;
1818 f->binary = 0;
1819 f->scantime = 0;
1820 memset(&f->id[0], 32, FAXIDLEN - 1);
1821 f->id[FAXIDLEN - 1] = 0;
1822 f->badlin = 0;
1823 f->badmul = 0;
1824 f->bor = 0;
1825 f->nbc = 0;
1826 f->cq = 0;
1827 f->cr = 0;
1828 f->ctcrty = 0;
1829 f->minsp = 0;
1830 f->phcto = 30;
1831 f->rel = 0;
1832 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1833 f->pollid[FAXIDLEN - 1] = 0;
1834 }
1835 #endif
1836
1837 static void
1838 isdn_tty_modem_reset_regs(modem_info * info, int force)
1839 {
1840 atemu *m = &info->emu;
1841 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1842 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1843 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1844 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1845 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1846 }
1847 #ifdef CONFIG_ISDN_AUDIO
1848 isdn_tty_modem_reset_vpar(m);
1849 #endif
1850 #ifdef CONFIG_ISDN_TTY_FAX
1851 isdn_tty_modem_reset_faxpar(info);
1852 #endif
1853 m->mdmcmdl = 0;
1854 }
1855
1856 static void
1857 modem_write_profile(atemu * m)
1858 {
1859 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1860 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1861 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1862 if (dev->profd)
1863 send_sig(SIGIO, dev->profd, 1);
1864 }
1865
1866 static struct tty_operations modem_ops = {
1867 .open = isdn_tty_open,
1868 .close = isdn_tty_close,
1869 .write = isdn_tty_write,
1870 .flush_chars = isdn_tty_flush_chars,
1871 .write_room = isdn_tty_write_room,
1872 .chars_in_buffer = isdn_tty_chars_in_buffer,
1873 .flush_buffer = isdn_tty_flush_buffer,
1874 .ioctl = isdn_tty_ioctl,
1875 .throttle = isdn_tty_throttle,
1876 .unthrottle = isdn_tty_unthrottle,
1877 .set_termios = isdn_tty_set_termios,
1878 .hangup = isdn_tty_hangup,
1879 .tiocmget = isdn_tty_tiocmget,
1880 .tiocmset = isdn_tty_tiocmset,
1881 };
1882
1883 int
1884 isdn_tty_modem_init(void)
1885 {
1886 isdn_modem_t *m;
1887 int i, retval;
1888 modem_info *info;
1889
1890 m = &dev->mdm;
1891 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1892 if (!m->tty_modem)
1893 return -ENOMEM;
1894 m->tty_modem->name = "ttyI";
1895 m->tty_modem->devfs_name = "isdn/ttyI";
1896 m->tty_modem->major = ISDN_TTY_MAJOR;
1897 m->tty_modem->minor_start = 0;
1898 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1899 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1900 m->tty_modem->init_termios = tty_std_termios;
1901 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1902 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
1903 m->tty_modem->driver_name = "isdn_tty";
1904 tty_set_operations(m->tty_modem, &modem_ops);
1905 retval = tty_register_driver(m->tty_modem);
1906 if (retval) {
1907 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1908 goto err;
1909 }
1910 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1911 info = &m->info[i];
1912 #ifdef CONFIG_ISDN_TTY_FAX
1913 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1914 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1915 retval = -ENOMEM;
1916 goto err_unregister;
1917 }
1918 #endif
1919 #ifdef MODULE
1920 info->owner = THIS_MODULE;
1921 #endif
1922 spin_lock_init(&info->readlock);
1923 init_MUTEX(&info->write_sem);
1924 sprintf(info->last_cause, "0000");
1925 sprintf(info->last_num, "none");
1926 info->last_dir = 0;
1927 info->last_lhup = 1;
1928 info->last_l2 = -1;
1929 info->last_si = 0;
1930 isdn_tty_reset_profile(&info->emu);
1931 isdn_tty_modem_reset_regs(info, 1);
1932 info->magic = ISDN_ASYNC_MAGIC;
1933 info->line = i;
1934 info->tty = NULL;
1935 info->x_char = 0;
1936 info->count = 0;
1937 info->blocked_open = 0;
1938 init_waitqueue_head(&info->open_wait);
1939 init_waitqueue_head(&info->close_wait);
1940 info->isdn_driver = -1;
1941 info->isdn_channel = -1;
1942 info->drv_index = -1;
1943 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1944 init_timer(&info->nc_timer);
1945 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1946 info->nc_timer.data = (unsigned long) info;
1947 skb_queue_head_init(&info->xmit_queue);
1948 #ifdef CONFIG_ISDN_AUDIO
1949 skb_queue_head_init(&info->dtmf_queue);
1950 #endif
1951 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1952 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1953 retval = -ENOMEM;
1954 goto err_unregister;
1955 }
1956 /* Make room for T.70 header */
1957 info->xmit_buf += 4;
1958 }
1959 return 0;
1960 err_unregister:
1961 for (i--; i >= 0; i--) {
1962 info = &m->info[i];
1963 #ifdef CONFIG_ISDN_TTY_FAX
1964 kfree(info->fax);
1965 #endif
1966 kfree(info->xmit_buf - 4);
1967 }
1968 tty_unregister_driver(m->tty_modem);
1969 err:
1970 put_tty_driver(m->tty_modem);
1971 m->tty_modem = NULL;
1972 return retval;
1973 }
1974
1975 void
1976 isdn_tty_exit(void)
1977 {
1978 modem_info *info;
1979 int i;
1980
1981 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1982 info = &dev->mdm.info[i];
1983 isdn_tty_cleanup_xmit(info);
1984 #ifdef CONFIG_ISDN_TTY_FAX
1985 kfree(info->fax);
1986 #endif
1987 kfree(info->xmit_buf - 4);
1988 }
1989 tty_unregister_driver(dev->mdm.tty_modem);
1990 put_tty_driver(dev->mdm.tty_modem);
1991 dev->mdm.tty_modem = NULL;
1992 }
1993
1994
1995 /*
1996 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1997 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1998 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1999 */
2000
2001 static int
2002 isdn_tty_match_icall(char *cid, atemu *emu, int di)
2003 {
2004 #ifdef ISDN_DEBUG_MODEM_ICALL
2005 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
2006 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
2007 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
2008 #endif
2009 if (strlen(emu->lmsn)) {
2010 char *p = emu->lmsn;
2011 char *q;
2012 int tmp;
2013 int ret = 0;
2014
2015 while (1) {
2016 if ((q = strchr(p, ';')))
2017 *q = '\0';
2018 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2019 ret = tmp;
2020 #ifdef ISDN_DEBUG_MODEM_ICALL
2021 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2022 p, isdn_map_eaz2msn(emu->msn, di), tmp);
2023 #endif
2024 if (q) {
2025 *q = ';';
2026 p = q;
2027 p++;
2028 }
2029 if (!tmp)
2030 return 0;
2031 if (!q)
2032 break;
2033 }
2034 return ret;
2035 } else {
2036 int tmp;
2037 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2038 #ifdef ISDN_DEBUG_MODEM_ICALL
2039 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2040 isdn_map_eaz2msn(emu->msn, di), tmp);
2041 #endif
2042 return tmp;
2043 }
2044 }
2045
2046 /*
2047 * An incoming call-request has arrived.
2048 * Search the tty-devices for an appropriate device and bind
2049 * it to the ISDN-Channel.
2050 * Return:
2051 *
2052 * 0 = No matching device found.
2053 * 1 = A matching device found.
2054 * 3 = No match found, but eventually would match, if
2055 * CID is longer.
2056 */
2057 int
2058 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2059 {
2060 char *eaz;
2061 int i;
2062 int wret;
2063 int idx;
2064 int si1;
2065 int si2;
2066 char *nr;
2067 ulong flags;
2068
2069 if (!setup->phone[0]) {
2070 nr = "0";
2071 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2072 } else
2073 nr = setup->phone;
2074 si1 = (int) setup->si1;
2075 si2 = (int) setup->si2;
2076 if (!setup->eazmsn[0]) {
2077 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2078 eaz = "0";
2079 } else
2080 eaz = setup->eazmsn;
2081 #ifdef ISDN_DEBUG_MODEM_ICALL
2082 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2083 #endif
2084 wret = 0;
2085 spin_lock_irqsave(&dev->lock, flags);
2086 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2087 modem_info *info = &dev->mdm.info[i];
2088
2089 if (info->count == 0)
2090 continue;
2091 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
2092 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
2093 idx = isdn_dc2minor(di, ch);
2094 #ifdef ISDN_DEBUG_MODEM_ICALL
2095 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2096 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2097 info->flags, info->isdn_driver, info->isdn_channel,
2098 dev->usage[idx]);
2099 #endif
2100 if (
2101 #ifndef FIX_FILE_TRANSFER
2102 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2103 #endif
2104 (info->isdn_driver == -1) &&
2105 (info->isdn_channel == -1) &&
2106 (USG_NONE(dev->usage[idx]))) {
2107 int matchret;
2108
2109 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2110 wret = matchret;
2111 if (!matchret) { /* EAZ is matching */
2112 info->isdn_driver = di;
2113 info->isdn_channel = ch;
2114 info->drv_index = idx;
2115 dev->m_idx[idx] = info->line;
2116 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2117 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2118 strcpy(dev->num[idx], nr);
2119 strcpy(info->emu.cpn, eaz);
2120 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2121 info->emu.mdmreg[REG_PLAN] = setup->plan;
2122 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2123 isdn_info_update();
2124 spin_unlock_irqrestore(&dev->lock, flags);
2125 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2126 info->line);
2127 info->msr |= UART_MSR_RI;
2128 isdn_tty_modem_result(RESULT_RING, info);
2129 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2130 return 1;
2131 }
2132 }
2133 }
2134 }
2135 spin_unlock_irqrestore(&dev->lock, flags);
2136 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2137 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2138 return (wret == 2)?3:0;
2139 }
2140
2141 #define TTY_IS_ACTIVE(info) \
2142 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2143
2144 int
2145 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2146 {
2147 int mi;
2148 modem_info *info;
2149 char *e;
2150
2151 if (i < 0)
2152 return 0;
2153 if ((mi = dev->m_idx[i]) >= 0) {
2154 info = &dev->mdm.info[mi];
2155 switch (c->command) {
2156 case ISDN_STAT_CINF:
2157 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2158 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2159 if (e == (char *)c->parm.num)
2160 info->emu.charge = 0;
2161
2162 break;
2163 case ISDN_STAT_BSENT:
2164 #ifdef ISDN_TTY_STAT_DEBUG
2165 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2166 #endif
2167 if ((info->isdn_driver == c->driver) &&
2168 (info->isdn_channel == c->arg)) {
2169 info->msr |= UART_MSR_CTS;
2170 if (info->send_outstanding)
2171 if (!(--info->send_outstanding))
2172 info->lsr |= UART_LSR_TEMT;
2173 isdn_tty_tint(info);
2174 return 1;
2175 }
2176 break;
2177 case ISDN_STAT_CAUSE:
2178 #ifdef ISDN_TTY_STAT_DEBUG
2179 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2180 #endif
2181 /* Signal cause to tty-device */
2182 strncpy(info->last_cause, c->parm.num, 5);
2183 return 1;
2184 case ISDN_STAT_DISPLAY:
2185 #ifdef ISDN_TTY_STAT_DEBUG
2186 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2187 #endif
2188 /* Signal display to tty-device */
2189 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2190 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2191 isdn_tty_at_cout("\r\n", info);
2192 isdn_tty_at_cout("DISPLAY: ", info);
2193 isdn_tty_at_cout(c->parm.display, info);
2194 isdn_tty_at_cout("\r\n", info);
2195 }
2196 return 1;
2197 case ISDN_STAT_DCONN:
2198 #ifdef ISDN_TTY_STAT_DEBUG
2199 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2200 #endif
2201 if (TTY_IS_ACTIVE(info)) {
2202 if (info->dialing == 1) {
2203 info->dialing = 2;
2204 return 1;
2205 }
2206 }
2207 break;
2208 case ISDN_STAT_DHUP:
2209 #ifdef ISDN_TTY_STAT_DEBUG
2210 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2211 #endif
2212 if (TTY_IS_ACTIVE(info)) {
2213 if (info->dialing == 1)
2214 isdn_tty_modem_result(RESULT_BUSY, info);
2215 if (info->dialing > 1)
2216 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2217 info->dialing = 0;
2218 #ifdef ISDN_DEBUG_MODEM_HUP
2219 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2220 #endif
2221 isdn_tty_modem_hup(info, 0);
2222 return 1;
2223 }
2224 break;
2225 case ISDN_STAT_BCONN:
2226 #ifdef ISDN_TTY_STAT_DEBUG
2227 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2228 #endif
2229 /* Wake up any processes waiting
2230 * for incoming call of this device when
2231 * DCD follow the state of incoming carrier
2232 */
2233 if (info->blocked_open &&
2234 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2235 wake_up_interruptible(&info->open_wait);
2236 }
2237
2238 /* Schedule CONNECT-Message to any tty
2239 * waiting for it and
2240 * set DCD-bit of its modem-status.
2241 */
2242 if (TTY_IS_ACTIVE(info) ||
2243 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2244 info->msr |= UART_MSR_DCD;
2245 info->emu.charge = 0;
2246 if (info->dialing & 0xf)
2247 info->last_dir = 1;
2248 else
2249 info->last_dir = 0;
2250 info->dialing = 0;
2251 info->rcvsched = 1;
2252 if (USG_MODEM(dev->usage[i])) {
2253 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2254 strcpy(info->emu.connmsg, c->parm.num);
2255 isdn_tty_modem_result(RESULT_CONNECT, info);
2256 } else
2257 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2258 }
2259 if (USG_VOICE(dev->usage[i]))
2260 isdn_tty_modem_result(RESULT_VCON, info);
2261 return 1;
2262 }
2263 break;
2264 case ISDN_STAT_BHUP:
2265 #ifdef ISDN_TTY_STAT_DEBUG
2266 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2267 #endif
2268 if (TTY_IS_ACTIVE(info)) {
2269 #ifdef ISDN_DEBUG_MODEM_HUP
2270 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2271 #endif
2272 isdn_tty_modem_hup(info, 0);
2273 return 1;
2274 }
2275 break;
2276 case ISDN_STAT_NODCH:
2277 #ifdef ISDN_TTY_STAT_DEBUG
2278 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2279 #endif
2280 if (TTY_IS_ACTIVE(info)) {
2281 if (info->dialing) {
2282 info->dialing = 0;
2283 info->last_l2 = -1;
2284 info->last_si = 0;
2285 sprintf(info->last_cause, "0000");
2286 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2287 }
2288 isdn_tty_modem_hup(info, 0);
2289 return 1;
2290 }
2291 break;
2292 case ISDN_STAT_UNLOAD:
2293 #ifdef ISDN_TTY_STAT_DEBUG
2294 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2295 #endif
2296 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2297 info = &dev->mdm.info[i];
2298 if (info->isdn_driver == c->driver) {
2299 if (info->online)
2300 isdn_tty_modem_hup(info, 1);
2301 }
2302 }
2303 return 1;
2304 #ifdef CONFIG_ISDN_TTY_FAX
2305 case ISDN_STAT_FAXIND:
2306 if (TTY_IS_ACTIVE(info)) {
2307 isdn_tty_fax_command(info, c);
2308 }
2309 break;
2310 #endif
2311 #ifdef CONFIG_ISDN_AUDIO
2312 case ISDN_STAT_AUDIO:
2313 if (TTY_IS_ACTIVE(info)) {
2314 switch(c->parm.num[0]) {
2315 case ISDN_AUDIO_DTMF:
2316 if (info->vonline) {
2317 isdn_audio_put_dle_code(info,
2318 c->parm.num[1]);
2319 }
2320 break;
2321 }
2322 }
2323 break;
2324 #endif
2325 }
2326 }
2327 return 0;
2328 }
2329
2330 /*********************************************************************
2331 Modem-Emulator-Routines
2332 *********************************************************************/
2333
2334 #define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2335
2336 /*
2337 * Put a message from the AT-emulator into receive-buffer of tty,
2338 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2339 */
2340 void
2341 isdn_tty_at_cout(char *msg, modem_info * info)
2342 {
2343 struct tty_struct *tty;
2344 atemu *m = &info->emu;
2345 char *p;
2346 char c;
2347 u_long flags;
2348 struct sk_buff *skb = NULL;
2349 char *sp = NULL;
2350
2351 if (!msg) {
2352 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2353 return;
2354 }
2355 spin_lock_irqsave(&info->readlock, flags);
2356 tty = info->tty;
2357 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2358 spin_unlock_irqrestore(&info->readlock, flags);
2359 return;
2360 }
2361
2362 /* use queue instead of direct flip, if online and */
2363 /* data is in queue or flip buffer is full */
2364 if ((info->online) && (((tty->flip.count + strlen(msg)) >= TTY_FLIPBUF_SIZE) ||
2365 (!skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel])))) {
2366 skb = alloc_skb(strlen(msg), GFP_ATOMIC);
2367 if (!skb) {
2368 spin_unlock_irqrestore(&info->readlock, flags);
2369 return;
2370 }
2371 sp = skb_put(skb, strlen(msg));
2372 #ifdef CONFIG_ISDN_AUDIO
2373 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2374 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2375 #endif
2376 }
2377
2378 for (p = msg; *p; p++) {
2379 switch (*p) {
2380 case '\r':
2381 c = m->mdmreg[REG_CR];
2382 break;
2383 case '\n':
2384 c = m->mdmreg[REG_LF];
2385 break;
2386 case '\b':
2387 c = m->mdmreg[REG_BS];
2388 break;
2389 default:
2390 c = *p;
2391 }
2392 if (skb) {
2393 *sp++ = c;
2394 } else {
2395 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
2396 break;
2397 tty_insert_flip_char(tty, c, 0);
2398 }
2399 }
2400 if (skb) {
2401 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2402 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2403 spin_unlock_irqrestore(&info->readlock, flags);
2404 /* Schedule dequeuing */
2405 if ((dev->modempoll) && (info->rcvsched))
2406 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2407
2408 } else {
2409 spin_unlock_irqrestore(&info->readlock, flags);
2410 schedule_delayed_work(&tty->flip.work, 1);
2411 }
2412 }
2413
2414 /*
2415 * Perform ATH Hangup
2416 */
2417 static void
2418 isdn_tty_on_hook(modem_info * info)
2419 {
2420 if (info->isdn_channel >= 0) {
2421 #ifdef ISDN_DEBUG_MODEM_HUP
2422 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2423 #endif
2424 isdn_tty_modem_hup(info, 1);
2425 }
2426 }
2427
2428 static void
2429 isdn_tty_off_hook(void)
2430 {
2431 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2432 }
2433
2434 #define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
2435 #define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
2436
2437 /*
2438 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2439 * isdn_tty_modem_escape() if sequence found.
2440 *
2441 * Parameters:
2442 * p pointer to databuffer
2443 * plus escape-character
2444 * count length of buffer
2445 * pluscount count of valid escape-characters so far
2446 * lastplus timestamp of last character
2447 */
2448 static void
2449 isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2450 u_long *lastplus)
2451 {
2452 if (plus > 127)
2453 return;
2454 if (count > 3) {
2455 p += count - 3;
2456 count = 3;
2457 *pluscount = 0;
2458 }
2459 while (count > 0) {
2460 if (*(p++) == plus) {
2461 if ((*pluscount)++) {
2462 /* Time since last '+' > 0.5 sec. ? */
2463 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2464 *pluscount = 1;
2465 } else {
2466 /* Time since last non-'+' < 1.5 sec. ? */
2467 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2468 *pluscount = 0;
2469 }
2470 if ((*pluscount == 3) && (count == 1))
2471 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2472 if (*pluscount > 3)
2473 *pluscount = 1;
2474 } else
2475 *pluscount = 0;
2476 *lastplus = jiffies;
2477 count--;
2478 }
2479 }
2480
2481 /*
2482 * Return result of AT-emulator to tty-receive-buffer, depending on
2483 * modem-register 12, bit 0 and 1.
2484 * For CONNECT-messages also switch to online-mode.
2485 * For RING-message handle auto-ATA if register 0 != 0
2486 */
2487
2488 static void
2489 isdn_tty_modem_result(int code, modem_info * info)
2490 {
2491 atemu *m = &info->emu;
2492 static char *msg[] =
2493 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2494 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2495 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2496 char s[ISDN_MSNLEN+10];
2497
2498 switch (code) {
2499 case RESULT_RING:
2500 m->mdmreg[REG_RINGCNT]++;
2501 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2502 /* Automatically accept incoming call */
2503 isdn_tty_cmd_ATA(info);
2504 break;
2505 case RESULT_NO_CARRIER:
2506 #ifdef ISDN_DEBUG_MODEM_HUP
2507 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2508 (info->flags & ISDN_ASYNC_CLOSING),
2509 (!info->tty));
2510 #endif
2511 m->mdmreg[REG_RINGCNT] = 0;
2512 del_timer(&info->nc_timer);
2513 info->ncarrier = 0;
2514 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2515 return;
2516 }
2517 #ifdef CONFIG_ISDN_AUDIO
2518 if (info->vonline & 1) {
2519 #ifdef ISDN_DEBUG_MODEM_VOICE
2520 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2521 info->line);
2522 #endif
2523 /* voice-recording, add DLE-ETX */
2524 isdn_tty_at_cout("\020\003", info);
2525 }
2526 if (info->vonline & 2) {
2527 #ifdef ISDN_DEBUG_MODEM_VOICE
2528 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2529 info->line);
2530 #endif
2531 /* voice-playing, add DLE-DC4 */
2532 isdn_tty_at_cout("\020\024", info);
2533 }
2534 #endif
2535 break;
2536 case RESULT_CONNECT:
2537 case RESULT_CONNECT64000:
2538 sprintf(info->last_cause, "0000");
2539 if (!info->online)
2540 info->online = 2;
2541 break;
2542 case RESULT_VCON:
2543 #ifdef ISDN_DEBUG_MODEM_VOICE
2544 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2545 info->line);
2546 #endif
2547 sprintf(info->last_cause, "0000");
2548 if (!info->online)
2549 info->online = 1;
2550 break;
2551 } /* switch(code) */
2552
2553 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2554 /* Show results */
2555 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2556 /* Show numeric results only */
2557 sprintf(s, "\r\n%d\r\n", code);
2558 isdn_tty_at_cout(s, info);
2559 } else {
2560 if (code == RESULT_RING) {
2561 /* return if "show RUNG" and ringcounter>1 */
2562 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2563 (m->mdmreg[REG_RINGCNT] > 1))
2564 return;
2565 /* print CID, _before_ _every_ ring */
2566 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2567 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2568 isdn_tty_at_cout(dev->num[info->drv_index], info);
2569 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2570 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2571 isdn_tty_at_cout(info->emu.cpn, info);
2572 }
2573 }
2574 }
2575 isdn_tty_at_cout("\r\n", info);
2576 isdn_tty_at_cout(msg[code], info);
2577 switch (code) {
2578 case RESULT_CONNECT:
2579 switch (m->mdmreg[REG_L2PROT]) {
2580 case ISDN_PROTO_L2_MODEM:
2581 isdn_tty_at_cout(" ", info);
2582 isdn_tty_at_cout(m->connmsg, info);
2583 break;
2584 }
2585 break;
2586 case RESULT_RING:
2587 /* Append CPN, if enabled */
2588 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2589 sprintf(s, "/%s", m->cpn);
2590 isdn_tty_at_cout(s, info);
2591 }
2592 /* Print CID only once, _after_ 1st RING */
2593 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2594 (m->mdmreg[REG_RINGCNT] == 1)) {
2595 isdn_tty_at_cout("\r\n", info);
2596 isdn_tty_at_cout("CALLER NUMBER: ", info);
2597 isdn_tty_at_cout(dev->num[info->drv_index], info);
2598 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2599 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2600 isdn_tty_at_cout(info->emu.cpn, info);
2601 }
2602 }
2603 break;
2604 case RESULT_NO_CARRIER:
2605 case RESULT_NO_DIALTONE:
2606 case RESULT_BUSY:
2607 case RESULT_NO_ANSWER:
2608 m->mdmreg[REG_RINGCNT] = 0;
2609 /* Append Cause-Message if enabled */
2610 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2611 sprintf(s, "/%s", info->last_cause);
2612 isdn_tty_at_cout(s, info);
2613 }
2614 break;
2615 case RESULT_CONNECT64000:
2616 /* Append Protocol to CONNECT message */
2617 switch (m->mdmreg[REG_L2PROT]) {
2618 case ISDN_PROTO_L2_X75I:
2619 case ISDN_PROTO_L2_X75UI:
2620 case ISDN_PROTO_L2_X75BUI:
2621 isdn_tty_at_cout("/X.75", info);
2622 break;
2623 case ISDN_PROTO_L2_HDLC:
2624 isdn_tty_at_cout("/HDLC", info);
2625 break;
2626 case ISDN_PROTO_L2_V11096:
2627 isdn_tty_at_cout("/V110/9600", info);
2628 break;
2629 case ISDN_PROTO_L2_V11019:
2630 isdn_tty_at_cout("/V110/19200", info);
2631 break;
2632 case ISDN_PROTO_L2_V11038:
2633 isdn_tty_at_cout("/V110/38400", info);
2634 break;
2635 }
2636 if (m->mdmreg[REG_T70] & BIT_T70) {
2637 isdn_tty_at_cout("/T.70", info);
2638 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2639 isdn_tty_at_cout("+", info);
2640 }
2641 break;
2642 }
2643 isdn_tty_at_cout("\r\n", info);
2644 }
2645 }
2646 if (code == RESULT_NO_CARRIER) {
2647 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2648 return;
2649 }
2650 tty_ldisc_flush(info->tty);
2651 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2652 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2653 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2654 tty_hangup(info->tty);
2655 }
2656 }
2657 }
2658
2659
2660 /*
2661 * Display a modem-register-value.
2662 */
2663 static void
2664 isdn_tty_show_profile(int ridx, modem_info * info)
2665 {
2666 char v[6];
2667
2668 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2669 isdn_tty_at_cout(v, info);
2670 }
2671
2672 /*
2673 * Get MSN-string from char-pointer, set pointer to end of number
2674 */
2675 static void
2676 isdn_tty_get_msnstr(char *n, char **p)
2677 {
2678 int limit = ISDN_MSNLEN - 1;
2679
2680 while (((*p[0] >= '0' && *p[0] <= '9') ||
2681 /* Why a comma ??? */
2682 (*p[0] == ',') || (*p[0] == ':')) &&
2683 (limit--))
2684 *n++ = *p[0]++;
2685 *n = '\0';
2686 }
2687
2688 /*
2689 * Get phone-number from modem-commandbuffer
2690 */
2691 static void
2692 isdn_tty_getdial(char *p, char *q,int cnt)
2693 {
2694 int first = 1;
2695 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2696 buffer overflow */
2697
2698 while (strchr(" 0123456789,#.*WPTS-", *p) && *p && --cnt>0) {
2699 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2700 (*p == '*') || (*p == '#')) {
2701 *q++ = *p;
2702 limit--;
2703 }
2704 if(!limit)
2705 break;
2706 p++;
2707 first = 0;
2708 }
2709 *q = 0;
2710 }
2711
2712 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2713 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2714
2715 static void
2716 isdn_tty_report(modem_info * info)
2717 {
2718 atemu *m = &info->emu;
2719 char s[80];
2720
2721 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2722 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2723 isdn_tty_at_cout(s, info);
2724 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2725 isdn_tty_at_cout(s, info);
2726 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2727 switch (info->last_l2) {
2728 case ISDN_PROTO_L2_X75I:
2729 isdn_tty_at_cout("X.75i", info);
2730 break;
2731 case ISDN_PROTO_L2_X75UI:
2732 isdn_tty_at_cout("X.75ui", info);
2733 break;
2734 case ISDN_PROTO_L2_X75BUI:
2735 isdn_tty_at_cout("X.75bui", info);
2736 break;
2737 case ISDN_PROTO_L2_HDLC:
2738 isdn_tty_at_cout("HDLC", info);
2739 break;
2740 case ISDN_PROTO_L2_V11096:
2741 isdn_tty_at_cout("V.110 9600 Baud", info);
2742 break;
2743 case ISDN_PROTO_L2_V11019:
2744 isdn_tty_at_cout("V.110 19200 Baud", info);
2745 break;
2746 case ISDN_PROTO_L2_V11038:
2747 isdn_tty_at_cout("V.110 38400 Baud", info);
2748 break;
2749 case ISDN_PROTO_L2_TRANS:
2750 isdn_tty_at_cout("transparent", info);
2751 break;
2752 case ISDN_PROTO_L2_MODEM:
2753 isdn_tty_at_cout("modem", info);
2754 break;
2755 case ISDN_PROTO_L2_FAX:
2756 isdn_tty_at_cout("fax", info);
2757 break;
2758 default:
2759 isdn_tty_at_cout("unknown", info);
2760 break;
2761 }
2762 if (m->mdmreg[REG_T70] & BIT_T70) {
2763 isdn_tty_at_cout("/T.70", info);
2764 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2765 isdn_tty_at_cout("+", info);
2766 }
2767 isdn_tty_at_cout("\r\n", info);
2768 isdn_tty_at_cout(" Service: ", info);
2769 switch (info->last_si) {
2770 case 1:
2771 isdn_tty_at_cout("audio\r\n", info);
2772 break;
2773 case 5:
2774 isdn_tty_at_cout("btx\r\n", info);
2775 break;
2776 case 7:
2777 isdn_tty_at_cout("data\r\n", info);
2778 break;
2779 default:
2780 sprintf(s, "%d\r\n", info->last_si);
2781 isdn_tty_at_cout(s, info);
2782 break;
2783 }
2784 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2785 isdn_tty_at_cout(s, info);
2786 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2787 isdn_tty_at_cout(s, info);
2788 }
2789
2790 /*
2791 * Parse AT&.. commands.
2792 */
2793 static int
2794 isdn_tty_cmd_ATand(char **p, modem_info * info)
2795 {
2796 atemu *m = &info->emu;
2797 int i;
2798 char rb[100];
2799
2800 #define MAXRB (sizeof(rb) - 1)
2801
2802 switch (*p[0]) {
2803 case 'B':
2804 /* &B - Set Buffersize */
2805 p[0]++;
2806 i = isdn_getnum(p);
2807 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2808 PARSE_ERROR1;
2809 #ifdef CONFIG_ISDN_AUDIO
2810 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2811 PARSE_ERROR1;
2812 #endif
2813 m->mdmreg[REG_PSIZE] = i / 16;
2814 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2815 switch (m->mdmreg[REG_L2PROT]) {
2816 case ISDN_PROTO_L2_V11096:
2817 case ISDN_PROTO_L2_V11019:
2818 case ISDN_PROTO_L2_V11038:
2819 info->xmit_size /= 10;
2820 }
2821 break;
2822 case 'C':
2823 /* &C - DCD Status */
2824 p[0]++;
2825 switch (isdn_getnum(p)) {
2826 case 0:
2827 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2828 break;
2829 case 1:
2830 m->mdmreg[REG_DCD] |= BIT_DCD;
2831 break;
2832 default:
2833 PARSE_ERROR1
2834 }
2835 break;
2836 case 'D':
2837 /* &D - Set DTR-Low-behavior */
2838 p[0]++;
2839 switch (isdn_getnum(p)) {
2840 case 0:
2841 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2842 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2843 break;
2844 case 2:
2845 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2846 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2847 break;
2848 case 3:
2849 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2850 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2851 break;
2852 default:
2853 PARSE_ERROR1
2854 }
2855 break;
2856 case 'E':
2857 /* &E -Set EAZ/MSN */
2858 p[0]++;
2859 isdn_tty_get_msnstr(m->msn, p);
2860 break;
2861 case 'F':
2862 /* &F -Set Factory-Defaults */
2863 p[0]++;
2864 if (info->msr & UART_MSR_DCD)
2865 PARSE_ERROR1;
2866 isdn_tty_reset_profile(m);
2867 isdn_tty_modem_reset_regs(info, 1);
2868 break;
2869 #ifdef DUMMY_HAYES_AT
2870 case 'K':
2871 /* only for be compilant with common scripts */
2872 /* &K Flowcontrol - no function */
2873 p[0]++;
2874 isdn_getnum(p);
2875 break;
2876 #endif
2877 case 'L':
2878 /* &L -Set Numbers to listen on */
2879 p[0]++;
2880 i = 0;
2881 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2882 (i < ISDN_LMSNLEN))
2883 m->lmsn[i++] = *p[0]++;
2884 m->lmsn[i] = '\0';
2885 break;
2886 case 'R':
2887 /* &R - Set V.110 bitrate adaption */
2888 p[0]++;
2889 i = isdn_getnum(p);
2890 switch (i) {
2891 case 0:
2892 /* Switch off V.110, back to X.75 */
2893 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2894 m->mdmreg[REG_SI2] = 0;
2895 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2896 break;
2897 case 9600:
2898 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2899 m->mdmreg[REG_SI2] = 197;
2900 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2901 break;
2902 case 19200:
2903 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2904 m->mdmreg[REG_SI2] = 199;
2905 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2906 break;
2907 case 38400:
2908 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2909 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2910 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2911 break;
2912 default:
2913 PARSE_ERROR1;
2914 }
2915 /* Switch off T.70 */
2916 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2917 /* Set Service 7 */
2918 m->mdmreg[REG_SI1] |= 4;
2919 break;
2920 case 'S':
2921 /* &S - Set Windowsize */
2922 p[0]++;
2923 i = isdn_getnum(p);
2924 if ((i > 0) && (i < 9))
2925 m->mdmreg[REG_WSIZE] = i;
2926 else
2927 PARSE_ERROR1;
2928 break;
2929 case 'V':
2930 /* &V - Show registers */
2931 p[0]++;
2932 isdn_tty_at_cout("\r\n", info);
2933 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2934 sprintf(rb, "S%02d=%03d%s", i,
2935 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2936 isdn_tty_at_cout(rb, info);
2937 }
2938 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2939 strlen(m->msn) ? m->msn : "None");
2940 isdn_tty_at_cout(rb, info);
2941 if (strlen(m->lmsn)) {
2942 isdn_tty_at_cout("\r\nListen: ", info);
2943 isdn_tty_at_cout(m->lmsn, info);
2944 isdn_tty_at_cout("\r\n", info);
2945 }
2946 break;
2947 case 'W':
2948 /* &W - Write Profile */
2949 p[0]++;
2950 switch (*p[0]) {
2951 case '0':
2952 p[0]++;
2953 modem_write_profile(m);
2954 break;
2955 default:
2956 PARSE_ERROR1;
2957 }
2958 break;
2959 case 'X':
2960 /* &X - Switch to BTX-Mode and T.70 */
2961 p[0]++;
2962 switch (isdn_getnum(p)) {
2963 case 0:
2964 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2965 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2966 break;
2967 case 1:
2968 m->mdmreg[REG_T70] |= BIT_T70;
2969 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2970 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2971 info->xmit_size = 112;
2972 m->mdmreg[REG_SI1] = 4;
2973 m->mdmreg[REG_SI2] = 0;
2974 break;
2975 case 2:
2976 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2977 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2978 info->xmit_size = 112;
2979 m->mdmreg[REG_SI1] = 4;
2980 m->mdmreg[REG_SI2] = 0;
2981 break;
2982 default:
2983 PARSE_ERROR1;
2984 }
2985 break;
2986 default:
2987 PARSE_ERROR1;
2988 }
2989 return 0;
2990 }
2991
2992 static int
2993 isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
2994 {
2995 /* Some plausibility checks */
2996 switch (mreg) {
2997 case REG_L2PROT:
2998 if (mval > ISDN_PROTO_L2_MAX)
2999 return 1;
3000 break;
3001 case REG_PSIZE:
3002 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
3003 return 1;
3004 #ifdef CONFIG_ISDN_AUDIO
3005 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
3006 return 1;
3007 #endif
3008 info->xmit_size = mval * 16;
3009 switch (m->mdmreg[REG_L2PROT]) {
3010 case ISDN_PROTO_L2_V11096:
3011 case ISDN_PROTO_L2_V11019:
3012 case ISDN_PROTO_L2_V11038:
3013 info->xmit_size /= 10;
3014 }
3015 break;
3016 case REG_SI1I:
3017 case REG_PLAN:
3018 case REG_SCREEN:
3019 /* readonly registers */
3020 return 1;
3021 }
3022 return 0;
3023 }
3024
3025 /*
3026 * Perform ATS command
3027 */
3028 static int
3029 isdn_tty_cmd_ATS(char **p, modem_info * info)
3030 {
3031 atemu *m = &info->emu;
3032 int bitpos;
3033 int mreg;
3034 int mval;
3035 int bval;
3036
3037 mreg = isdn_getnum(p);
3038 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3039 PARSE_ERROR1;
3040 switch (*p[0]) {
3041 case '=':
3042 p[0]++;
3043 mval = isdn_getnum(p);
3044 if (mval < 0 || mval > 255)
3045 PARSE_ERROR1;
3046 if (isdn_tty_check_ats(mreg, mval, info, m))
3047 PARSE_ERROR1;
3048 m->mdmreg[mreg] = mval;
3049 break;
3050 case '.':
3051 /* Set/Clear a single bit */
3052 p[0]++;
3053 bitpos = isdn_getnum(p);
3054 if ((bitpos < 0) || (bitpos > 7))
3055 PARSE_ERROR1;
3056 switch (*p[0]) {
3057 case '=':
3058 p[0]++;
3059 bval = isdn_getnum(p);
3060 if (bval < 0 || bval > 1)
3061 PARSE_ERROR1;
3062 if (bval)
3063 mval = m->mdmreg[mreg] | (1 << bitpos);
3064 else
3065 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3066 if (isdn_tty_check_ats(mreg, mval, info, m))
3067 PARSE_ERROR1;
3068 m->mdmreg[mreg] = mval;
3069 break;
3070 case '?':
3071 p[0]++;
3072 isdn_tty_at_cout("\r\n", info);
3073 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3074 info);
3075 break;
3076 default:
3077 PARSE_ERROR1;
3078 }
3079 break;
3080 case '?':
3081 p[0]++;
3082 isdn_tty_show_profile(mreg, info);
3083 break;
3084 default:
3085 PARSE_ERROR1;
3086 break;
3087 }
3088 return 0;
3089 }
3090
3091 /*
3092 * Perform ATA command
3093 */
3094 static void
3095 isdn_tty_cmd_ATA(modem_info * info)
3096 {
3097 atemu *m = &info->emu;
3098 isdn_ctrl cmd;
3099 int l2;
3100
3101 if (info->msr & UART_MSR_RI) {
3102 /* Accept incoming call */
3103 info->last_dir = 0;
3104 strcpy(info->last_num, dev->num[info->drv_index]);
3105 m->mdmreg[REG_RINGCNT] = 0;
3106 info->msr &= ~UART_MSR_RI;
3107 l2 = m->mdmreg[REG_L2PROT];
3108 #ifdef CONFIG_ISDN_AUDIO
3109 /* If more than one bit set in reg18, autoselect Layer2 */
3110 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3111 if (m->mdmreg[REG_SI1I] == 1) {
3112 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3113 l2 = ISDN_PROTO_L2_TRANS;
3114 } else
3115 l2 = ISDN_PROTO_L2_X75I;
3116 }
3117 #endif
3118 cmd.driver = info->isdn_driver;
3119 cmd.command = ISDN_CMD_SETL2;
3120 cmd.arg = info->isdn_channel + (l2 << 8);
3121 info->last_l2 = l2;
3122 isdn_command(&cmd);
3123 cmd.driver = info->isdn_driver;
3124 cmd.command = ISDN_CMD_SETL3;
3125 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3126 #ifdef CONFIG_ISDN_TTY_FAX
3127 if (l2 == ISDN_PROTO_L2_FAX) {
3128 cmd.parm.fax = info->fax;
3129 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3130 }
3131 #endif
3132 isdn_command(&cmd);
3133 cmd.driver = info->isdn_driver;
3134 cmd.arg = info->isdn_channel;
3135 cmd.command = ISDN_CMD_ACCEPTD;
3136 info->dialing = 16;
3137 info->emu.carrierwait = 0;
3138 isdn_command(&cmd);
3139 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3140 } else
3141 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3142 }
3143
3144 #ifdef CONFIG_ISDN_AUDIO
3145 /*
3146 * Parse AT+F.. commands
3147 */
3148 static int
3149 isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3150 {
3151 atemu *m = &info->emu;
3152 char rs[20];
3153
3154 if (!strncmp(p[0], "CLASS", 5)) {
3155 p[0] += 5;
3156 switch (*p[0]) {
3157 case '?':
3158 p[0]++;
3159 sprintf(rs, "\r\n%d",
3160 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3161 #ifdef CONFIG_ISDN_TTY_FAX
3162 if (TTY_IS_FCLASS2(info))
3163 sprintf(rs, "\r\n2");
3164 else if (TTY_IS_FCLASS1(info))
3165 sprintf(rs, "\r\n1");
3166 #endif
3167 isdn_tty_at_cout(rs, info);
3168 break;
3169 case '=':
3170 p[0]++;
3171 switch (*p[0]) {
3172 case '0':
3173 p[0]++;
3174 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3175 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3176 m->mdmreg[REG_SI1] = 4;
3177 info->xmit_size =
3178 m->mdmreg[REG_PSIZE] * 16;
3179 break;
3180 #ifdef CONFIG_ISDN_TTY_FAX
3181 case '1':
3182 p[0]++;
3183 if (!(dev->global_features &
3184 ISDN_FEATURE_L3_FCLASS1))
3185 PARSE_ERROR1;
3186 m->mdmreg[REG_SI1] = 1;
3187 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3188 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3189 info->xmit_size =
3190 m->mdmreg[REG_PSIZE] * 16;
3191 break;
3192 case '2':
3193 p[0]++;
3194 if (!(dev->global_features &
3195 ISDN_FEATURE_L3_FCLASS2))
3196 PARSE_ERROR1;
3197 m->mdmreg[REG_SI1] = 1;
3198 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3199 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3200 info->xmit_size =
3201 m->mdmreg[REG_PSIZE] * 16;
3202 break;
3203 #endif
3204 case '8':
3205 p[0]++;
3206 /* L2 will change on dialout with si=1 */
3207 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3208 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3209 m->mdmreg[REG_SI1] = 5;
3210 info->xmit_size = VBUF;
3211 break;
3212 case '?':
3213 p[0]++;
3214 strcpy(rs, "\r\n0,");
3215 #ifdef CONFIG_ISDN_TTY_FAX
3216 if (dev->global_features &
3217 ISDN_FEATURE_L3_FCLASS1)
3218 strcat(rs, "1,");
3219 if (dev->global_features &
3220 ISDN_FEATURE_L3_FCLASS2)
3221 strcat(rs, "2,");
3222 #endif
3223 strcat(rs, "8");
3224 isdn_tty_at_cout(rs, info);
3225 break;
3226 default:
3227 PARSE_ERROR1;
3228 }
3229 break;
3230 default:
3231 PARSE_ERROR1;
3232 }
3233 return 0;
3234 }
3235 #ifdef CONFIG_ISDN_TTY_FAX
3236 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3237 #else
3238 PARSE_ERROR1;
3239 #endif
3240 }
3241
3242 /*
3243 * Parse AT+V.. commands
3244 */
3245 static int
3246 isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3247 {
3248 atemu *m = &info->emu;
3249 isdn_ctrl cmd;
3250 static char *vcmd[] =
3251 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3252 int i;
3253 int par1;
3254 int par2;
3255 char rs[20];
3256
3257 i = 0;
3258 while (vcmd[i]) {
3259 if (!strncmp(vcmd[i], p[0], 2)) {
3260 p[0] += 2;
3261 break;
3262 }
3263 i++;
3264 }
3265 switch (i) {
3266 case 0:
3267 /* AT+VNH - Auto hangup feature */
3268 switch (*p[0]) {
3269 case '?':
3270 p[0]++;
3271 isdn_tty_at_cout("\r\n1", info);
3272 break;
3273 case '=':
3274 p[0]++;
3275 switch (*p[0]) {
3276 case '1':
3277 p[0]++;
3278 break;
3279 case '?':
3280 p[0]++;
3281 isdn_tty_at_cout("\r\n1", info);
3282 break;
3283 default:
3284 PARSE_ERROR1;
3285 }
3286 break;
3287 default:
3288 PARSE_ERROR1;
3289 }
3290 break;
3291 case 1:
3292 /* AT+VIP - Reset all voice parameters */
3293 isdn_tty_modem_reset_vpar(m);
3294 break;
3295 case 2:
3296 /* AT+VLS - Select device, accept incoming call */
3297 switch (*p[0]) {
3298 case '?':
3299 p[0]++;
3300 sprintf(rs, "\r\n%d", m->vpar[0]);
3301 isdn_tty_at_cout(rs, info);
3302 break;
3303 case '=':
3304 p[0]++;
3305 switch (*p[0]) {
3306 case '0':
3307 p[0]++;
3308 m->vpar[0] = 0;
3309 break;
3310 case '2':
3311 p[0]++;
3312 m->vpar[0] = 2;
3313 break;
3314 case '?':
3315 p[0]++;
3316 isdn_tty_at_cout("\r\n0,2", info);
3317 break;
3318 default:
3319 PARSE_ERROR1;
3320 }
3321 break;
3322 default:
3323 PARSE_ERROR1;
3324 }
3325 break;
3326 case 3:
3327 /* AT+VRX - Start recording */
3328 if (!m->vpar[0])
3329 PARSE_ERROR1;
3330 if (info->online != 1) {
3331 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3332 return 1;
3333 }
3334 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3335 if (!info->dtmf_state) {
3336 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3337 PARSE_ERROR1;
3338 }
3339 info->silence_state = isdn_audio_silence_init(info->silence_state);
3340 if (!info->silence_state) {
3341 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3342 PARSE_ERROR1;
3343 }
3344 if (m->vpar[3] < 5) {
3345 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3346 if (!info->adpcmr) {
3347 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3348 PARSE_ERROR1;
3349 }
3350 }
3351 #ifdef ISDN_DEBUG_AT
3352 printk(KERN_DEBUG "AT: +VRX\n");
3353 #endif
3354 info->vonline |= 1;
3355 isdn_tty_modem_result(RESULT_CONNECT, info);
3356 return 0;
3357 break;
3358 case 4:
3359 /* AT+VSD - Silence detection */
3360 switch (*p[0]) {
3361 case '?':
3362 p[0]++;
3363 sprintf(rs, "\r\n<%d>,<%d>",
3364 m->vpar[1],
3365 m->vpar[2]);
3366 isdn_tty_at_cout(rs, info);
3367 break;
3368 case '=':
3369 p[0]++;
3370 if ((*p[0]>='0') && (*p[0]<='9')) {
3371 par1 = isdn_getnum(p);
3372 if ((par1 < 0) || (par1 > 31))
3373 PARSE_ERROR1;
3374 if (*p[0] != ',')
3375 PARSE_ERROR1;
3376 p[0]++;
3377 par2 = isdn_getnum(p);
3378 if ((par2 < 0) || (par2 > 255))
3379 PARSE_ERROR1;
3380 m->vpar[1] = par1;
3381 m->vpar[2] = par2;
3382 break;
3383 } else
3384 if (*p[0] == '?') {
3385 p[0]++;
3386 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3387 info);
3388 break;
3389 } else
3390 PARSE_ERROR1;
3391 break;
3392 default:
3393 PARSE_ERROR1;
3394 }
3395 break;
3396 case 5:
3397 /* AT+VSM - Select compression */
3398 switch (*p[0]) {
3399 case '?':
3400 p[0]++;
3401 sprintf(rs, "\r\n<%d>,<%d><8000>",
3402 m->vpar[3],
3403 m->vpar[1]);
3404 isdn_tty_at_cout(rs, info);
3405 break;
3406 case '=':
3407 p[0]++;
3408 switch (*p[0]) {
3409 case '2':
3410 case '3':
3411 case '4':
3412 case '5':
3413 case '6':
3414 par1 = isdn_getnum(p);
3415 if ((par1 < 2) || (par1 > 6))
3416 PARSE_ERROR1;
3417 m->vpar[3] = par1;
3418 break;
3419 case '?':
3420 p[0]++;
3421 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3422 info);
3423 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3424 info);
3425 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3426 info);
3427 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3428 info);
3429 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3430 info);
3431 break;
3432 default:
3433 PARSE_ERROR1;
3434 }
3435 break;
3436 default:
3437 PARSE_ERROR1;
3438 }
3439 break;
3440 case 6:
3441 /* AT+VTX - Start sending */
3442 if (!m->vpar[0])
3443 PARSE_ERROR1;
3444 if (info->online != 1) {
3445 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3446 return 1;
3447 }
3448 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3449 if (!info->dtmf_state) {
3450 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3451 PARSE_ERROR1;
3452 }
3453 if (m->vpar[3] < 5) {
3454 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3455 if (!info->adpcms) {
3456 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3457 PARSE_ERROR1;
3458 }
3459 }
3460 #ifdef ISDN_DEBUG_AT
3461 printk(KERN_DEBUG "AT: +VTX\n");
3462 #endif
3463 m->lastDLE = 0;
3464 info->vonline |= 2;
3465 isdn_tty_modem_result(RESULT_CONNECT, info);
3466 return 0;
3467 break;
3468 case 7:
3469 /* AT+VDD - DTMF detection */
3470 switch (*p[0]) {
3471 case '?':
3472 p[0]++;
3473 sprintf(rs, "\r\n<%d>,<%d>",
3474 m->vpar[4],
3475 m->vpar[5]);
3476 isdn_tty_at_cout(rs, info);
3477 break;
3478 case '=':
3479 p[0]++;
3480 if ((*p[0]>='0') && (*p[0]<='9')) {
3481 if (info->online != 1)
3482 PARSE_ERROR1;
3483 par1 = isdn_getnum(p);
3484 if ((par1 < 0) || (par1 > 15))
3485 PARSE_ERROR1;
3486 if (*p[0] != ',')
3487 PARSE_ERROR1;
3488 p[0]++;
3489 par2 = isdn_getnum(p);
3490 if ((par2 < 0) || (par2 > 255))
3491 PARSE_ERROR1;
3492 m->vpar[4] = par1;
3493 m->vpar[5] = par2;
3494 cmd.driver = info->isdn_driver;
3495 cmd.command = ISDN_CMD_AUDIO;
3496 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3497 cmd.parm.num[0] = par1;
3498 cmd.parm.num[1] = par2;
3499 isdn_command(&cmd);
3500 break;
3501 } else
3502 if (*p[0] == '?') {
3503 p[0]++;
3504 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3505 info);
3506 break;
3507 } else
3508 PARSE_ERROR1;
3509 break;
3510 default:
3511 PARSE_ERROR1;
3512 }
3513 break;
3514 default:
3515 PARSE_ERROR1;
3516 }
3517 return 0;
3518 }
3519 #endif /* CONFIG_ISDN_AUDIO */
3520
3521 /*
3522 * Parse and perform an AT-command-line.
3523 */
3524 static void
3525 isdn_tty_parse_at(modem_info * info)
3526 {
3527 atemu *m = &info->emu;
3528 char *p;
3529 char ds[40];
3530
3531 #ifdef ISDN_DEBUG_AT
3532 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3533 #endif
3534 for (p = &m->mdmcmd[2]; *p;) {
3535 switch (*p) {
3536 case ' ':
3537 p++;
3538 break;
3539 case 'A':
3540 /* A - Accept incoming call */
3541 p++;
3542 isdn_tty_cmd_ATA(info);
3543 return;
3544 break;
3545 case 'D':
3546 /* D - Dial */
3547 if (info->msr & UART_MSR_DCD)
3548 PARSE_ERROR;
3549 if (info->msr & UART_MSR_RI) {
3550 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3551 return;
3552 }
3553 isdn_tty_getdial(++p, ds, sizeof ds);
3554 p += strlen(p);
3555 if (!strlen(m->msn))
3556 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3557 else if (strlen(ds))
3558 isdn_tty_dial(ds, info, m);
3559 else
3560 PARSE_ERROR;
3561 return;
3562 case 'E':
3563 /* E - Turn Echo on/off */
3564 p++;
3565 switch (isdn_getnum(&p)) {
3566 case 0:
3567 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3568 break;
3569 case 1:
3570 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3571 break;
3572 default:
3573 PARSE_ERROR;
3574 }
3575 break;
3576 case 'H':
3577 /* H - On/Off-hook */
3578 p++;
3579 switch (*p) {
3580 case '0':
3581 p++;
3582 isdn_tty_on_hook(info);
3583 break;
3584 case '1':
3585 p++;
3586 isdn_tty_off_hook();
3587 break;
3588 default:
3589 isdn_tty_on_hook(info);
3590 break;
3591 }
3592 break;
3593 case 'I':
3594 /* I - Information */
3595 p++;
3596 isdn_tty_at_cout("\r\nLinux ISDN", info);
3597 switch (*p) {
3598 case '0':
3599 case '1':
3600 p++;
3601 break;
3602 case '2':
3603 p++;
3604 isdn_tty_report(info);
3605 break;
3606 case '3':
3607 p++;
3608 sprintf(ds, "\r\n%d", info->emu.charge);
3609 isdn_tty_at_cout(ds, info);
3610 break;
3611 default:;
3612 }
3613 break;
3614 #ifdef DUMMY_HAYES_AT
3615 case 'L':
3616 case 'M':
3617 /* only for be compilant with common scripts */
3618 /* no function */
3619 p++;
3620 isdn_getnum(&p);
3621 break;
3622 #endif
3623 case 'O':
3624 /* O - Go online */
3625 p++;
3626 if (info->msr & UART_MSR_DCD)
3627 /* if B-Channel is up */
3628 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3629 else
3630 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3631 return;
3632 case 'Q':
3633 /* Q - Turn Emulator messages on/off */
3634 p++;
3635 switch (isdn_getnum(&p)) {
3636 case 0:
3637 m->mdmreg[REG_RESP] |= BIT_RESP;
3638 break;
3639 case 1:
3640 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3641 break;
3642 default:
3643 PARSE_ERROR;
3644 }
3645 break;
3646 case 'S':
3647 /* S - Set/Get Register */
3648 p++;
3649 if (isdn_tty_cmd_ATS(&p, info))
3650 return;
3651 break;
3652 case 'V':
3653 /* V - Numeric or ASCII Emulator-messages */
3654 p++;
3655 switch (isdn_getnum(&p)) {
3656 case 0:
3657 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3658 break;
3659 case 1:
3660 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3661 break;
3662 default:
3663 PARSE_ERROR;
3664 }
3665 break;
3666 case 'Z':
3667 /* Z - Load Registers from Profile */
3668 p++;
3669 if (info->msr & UART_MSR_DCD) {
3670 info->online = 0;
3671 isdn_tty_on_hook(info);
3672 }
3673 isdn_tty_modem_reset_regs(info, 1);
3674 break;
3675 case '+':
3676 p++;
3677 switch (*p) {
3678 #ifdef CONFIG_ISDN_AUDIO
3679 case 'F':
3680 p++;
3681 if (isdn_tty_cmd_PLUSF(&p, info))
3682 return;
3683 break;
3684 case 'V':
3685 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3686 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3687 PARSE_ERROR;
3688 p++;
3689 if (isdn_tty_cmd_PLUSV(&p, info))
3690 return;
3691 break;
3692 #endif /* CONFIG_ISDN_AUDIO */
3693 case 'S': /* SUSPEND */
3694 p++;
3695 isdn_tty_get_msnstr(ds, &p);
3696 isdn_tty_suspend(ds, info, m);
3697 break;
3698 case 'R': /* RESUME */
3699 p++;
3700 isdn_tty_get_msnstr(ds, &p);
3701 isdn_tty_resume(ds, info, m);
3702 break;
3703 case 'M': /* MESSAGE */
3704 p++;
3705 isdn_tty_send_msg(info, m, p);
3706 break;
3707 default:
3708 PARSE_ERROR;
3709 }
3710 break;
3711 case '&':
3712 p++;
3713 if (isdn_tty_cmd_ATand(&p, info))
3714 return;
3715 break;
3716 default:
3717 PARSE_ERROR;
3718 }
3719 }
3720 #ifdef CONFIG_ISDN_AUDIO
3721 if (!info->vonline)
3722 #endif
3723 isdn_tty_modem_result(RESULT_OK, info);
3724 }
3725
3726 /* Need own toupper() because standard-toupper is not available
3727 * within modules.
3728 */
3729 #define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3730
3731 /*
3732 * Perform line-editing of AT-commands
3733 *
3734 * Parameters:
3735 * p inputbuffer
3736 * count length of buffer
3737 * channel index to line (minor-device)
3738 */
3739 static int
3740 isdn_tty_edit_at(const char *p, int count, modem_info * info)
3741 {
3742 atemu *m = &info->emu;
3743 int total = 0;
3744 u_char c;
3745 char eb[2];
3746 int cnt;
3747
3748 for (cnt = count; cnt > 0; p++, cnt--) {
3749 c = *p;
3750 total++;
3751 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3752 /* Separator (CR or LF) */
3753 m->mdmcmd[m->mdmcmdl] = 0;
3754 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3755 eb[0] = c;
3756 eb[1] = 0;
3757 isdn_tty_at_cout(eb, info);
3758 }
3759 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3760 isdn_tty_parse_at(info);
3761 m->mdmcmdl = 0;
3762 continue;
3763 }
3764 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3765 /* Backspace-Function */
3766 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3767 if (m->mdmcmdl)
3768 m->mdmcmdl--;
3769 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3770 isdn_tty_at_cout("\b", info);
3771 }
3772 continue;
3773 }
3774 if (cmdchar(c)) {
3775 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3776 eb[0] = c;
3777 eb[1] = 0;
3778 isdn_tty_at_cout(eb, info);
3779 }
3780 if (m->mdmcmdl < 255) {
3781 c = my_toupper(c);
3782 switch (m->mdmcmdl) {
3783 case 1:
3784 if (c == 'T') {
3785 m->mdmcmd[m->mdmcmdl] = c;
3786 m->mdmcmd[++m->mdmcmdl] = 0;
3787 break;
3788 } else
3789 m->mdmcmdl = 0;
3790 /* Fall through, check for 'A' */
3791 case 0:
3792 if (c == 'A') {
3793 m->mdmcmd[m->mdmcmdl] = c;
3794 m->mdmcmd[++m->mdmcmdl] = 0;
3795 }
3796 break;
3797 default:
3798 m->mdmcmd[m->mdmcmdl] = c;
3799 m->mdmcmd[++m->mdmcmdl] = 0;
3800 }
3801 }
3802 }
3803 }
3804 return total;
3805 }
3806
3807 /*
3808 * Switch all modem-channels who are online and got a valid
3809 * escape-sequence 1.5 seconds ago, to command-mode.
3810 * This function is called every second via timer-interrupt from within
3811 * timer-dispatcher isdn_timer_function()
3812 */
3813 void
3814 isdn_tty_modem_escape(void)
3815 {
3816 int ton = 0;
3817 int i;
3818 int midx;
3819
3820 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3821 if (USG_MODEM(dev->usage[i]))
3822 if ((midx = dev->m_idx[i]) >= 0) {
3823 modem_info *info = &dev->mdm.info[midx];
3824 if (info->online) {
3825 ton = 1;
3826 if ((info->emu.pluscount == 3) &&
3827 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3828 info->emu.pluscount = 0;
3829 info->online = 0;
3830 isdn_tty_modem_result(RESULT_OK, info);
3831 }
3832 }
3833 }
3834 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3835 }
3836
3837 /*
3838 * Put a RING-message to all modem-channels who have the RI-bit set.
3839 * This function is called every second via timer-interrupt from within
3840 * timer-dispatcher isdn_timer_function()
3841 */
3842 void
3843 isdn_tty_modem_ring(void)
3844 {
3845 int ton = 0;
3846 int i;
3847
3848 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3849 modem_info *info = &dev->mdm.info[i];
3850 if (info->msr & UART_MSR_RI) {
3851 ton = 1;
3852 isdn_tty_modem_result(RESULT_RING, info);
3853 }
3854 }
3855 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3856 }
3857
3858 /*
3859 * For all online tty's, try sending data to
3860 * the lower levels.
3861 */
3862 void
3863 isdn_tty_modem_xmit(void)
3864 {
3865 int ton = 1;
3866 int i;
3867
3868 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3869 modem_info *info = &dev->mdm.info[i];
3870 if (info->online) {
3871 ton = 1;
3872 isdn_tty_senddown(info);
3873 isdn_tty_tint(info);
3874 }
3875 }
3876 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3877 }
3878
3879 /*
3880 * Check all channels if we have a 'no carrier' timeout.
3881 * Timeout value is set by Register S7.
3882 */
3883 void
3884 isdn_tty_carrier_timeout(void)
3885 {
3886 int ton = 0;
3887 int i;
3888
3889 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3890 modem_info *info = &dev->mdm.info[i];
3891 if (info->dialing) {
3892 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3893 info->dialing = 0;
3894 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3895 isdn_tty_modem_hup(info, 1);
3896 }
3897 else
3898 ton = 1;
3899 }
3900 }
3901 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3902 }
Linux kernel - Deliverables
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