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initial commit with v2.6.9
[linux-2.6.9-moxart.git] / drivers / isdn / i4l / isdn_tty.c
blob921c3c2ab97a19bcce843dbb5a93cca81ff03fee
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 "isdn_common.h"
17 #include "isdn_tty.h"
18 #ifdef CONFIG_ISDN_AUDIO
19 #include "isdn_audio.h"
20 #define VBUF 0x3e0
21 #define VBUFX (VBUF/16)
22 #endif
23
24 #define FIX_FILE_TRANSFER
25 #define DUMMY_HAYES_AT
26
27 /* Prototypes */
28
29 static int isdn_tty_edit_at(const char *, int, modem_info *, int);
30 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *, int);
31 static void isdn_tty_modem_reset_regs(modem_info *, int);
32 static void isdn_tty_cmd_ATA(modem_info *);
33 static void isdn_tty_flush_buffer(struct tty_struct *);
34 static void isdn_tty_modem_result(int, modem_info *);
35 #ifdef CONFIG_ISDN_AUDIO
36 static int isdn_tty_countDLE(unsigned char *, int);
37 #endif
38
39 /* Leave this unchanged unless you know what you do! */
40 #define MODEM_PARANOIA_CHECK
41 #define MODEM_DO_RESTART
42
43 static int bit2si[8] =
44 {1, 5, 7, 7, 7, 7, 7, 7};
45 static int si2bit[8] =
46 {4, 1, 4, 4, 4, 4, 4, 4};
47
48 char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
49
50
51 /* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
52 * to stuff incoming data directly into a tty's flip-buffer. This
53 * is done to speed up tty-receiving if the receive-queue is empty.
54 * This routine MUST be called with interrupts off.
55 * Return:
56 * 1 = Success
57 * 0 = Failure, data has to be buffered and later processed by
58 * isdn_tty_readmodem().
59 */
60 static int
61 isdn_tty_try_read(modem_info * info, struct sk_buff *skb)
62 {
63 int c;
64 int len;
65 struct tty_struct *tty;
66
67 if (info->online) {
68 if ((tty = info->tty)) {
69 if (info->mcr & UART_MCR_RTS) {
70 c = TTY_FLIPBUF_SIZE - tty->flip.count;
71 len = skb->len
72 #ifdef CONFIG_ISDN_AUDIO
73 + ISDN_AUDIO_SKB_DLECOUNT(skb)
74 #endif
75 ;
76 if (c >= len) {
77 #ifdef CONFIG_ISDN_AUDIO
78 if (ISDN_AUDIO_SKB_DLECOUNT(skb))
79 while (skb->len--) {
80 if (*skb->data == DLE)
81 tty_insert_flip_char(tty, DLE, 0);
82 tty_insert_flip_char(tty, *skb->data++, 0);
83 } else {
84 #endif
85 memcpy(tty->flip.char_buf_ptr,
86 skb->data, len);
87 tty->flip.count += len;
88 tty->flip.char_buf_ptr += len;
89 memset(tty->flip.flag_buf_ptr, 0, len);
90 tty->flip.flag_buf_ptr += len;
91 #ifdef CONFIG_ISDN_AUDIO
92 }
93 #endif
94 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
95 tty->flip.flag_buf_ptr[len - 1] = 0xff;
96 schedule_delayed_work(&tty->flip.work, 1);
97 kfree_skb(skb);
98 return 1;
99 }
100 }
101 }
102 }
103 return 0;
104 }
105
106 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
107 * It tries getting received data from the receive queue an stuff it into
108 * the tty's flip-buffer.
109 */
110 void
111 isdn_tty_readmodem(void)
112 {
113 int resched = 0;
114 int midx;
115 int i;
116 int c;
117 int r;
118 struct tty_struct *tty;
119 modem_info *info;
120
121 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
122 if ((midx = dev->m_idx[i]) >= 0) {
123 info = &dev->mdm.info[midx];
124 if (info->online) {
125 r = 0;
126 #ifdef CONFIG_ISDN_AUDIO
127 isdn_audio_eval_dtmf(info);
128 if ((info->vonline & 1) && (info->emu.vpar[1]))
129 isdn_audio_eval_silence(info);
130 #endif
131 if ((tty = info->tty)) {
132 if (info->mcr & UART_MCR_RTS) {
133 c = TTY_FLIPBUF_SIZE - tty->flip.count;
134 if (c > 0) {
135 r = isdn_readbchan(info->isdn_driver, info->isdn_channel,
136 tty->flip.char_buf_ptr,
137 tty->flip.flag_buf_ptr, c, NULL);
138 /* CISCO AsyncPPP Hack */
139 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
140 memset(tty->flip.flag_buf_ptr, 0, r);
141 tty->flip.count += r;
142 tty->flip.flag_buf_ptr += r;
143 tty->flip.char_buf_ptr += r;
144 if (r)
145 schedule_delayed_work(&tty->flip.work, 1);
146 }
147 } else
148 r = 1;
149 } else
150 r = 1;
151 if (r) {
152 info->rcvsched = 0;
153 resched = 1;
154 } else
155 info->rcvsched = 1;
156 }
157 }
158 }
159 if (!resched)
160 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
161 }
162
163 int
164 isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
165 {
166 ulong flags;
167 int midx;
168 #ifdef CONFIG_ISDN_AUDIO
169 int ifmt;
170 #endif
171 modem_info *info;
172
173 if ((midx = dev->m_idx[i]) < 0) {
174 /* if midx is invalid, packet is not for tty */
175 return 0;
176 }
177 info = &dev->mdm.info[midx];
178 #ifdef CONFIG_ISDN_AUDIO
179 ifmt = 1;
180
181 if ((info->vonline) && (!info->emu.vpar[4]))
182 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
183 if ((info->vonline & 1) && (info->emu.vpar[1]))
184 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
185 #endif
186 if ((info->online < 2)
187 #ifdef CONFIG_ISDN_AUDIO
188 && (!(info->vonline & 1))
189 #endif
190 ) {
191 /* If Modem not listening, drop data */
192 kfree_skb(skb);
193 return 1;
194 }
195 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
196 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
197 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
198 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
199 skb_pull(skb, 4);
200 else
201 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
202 skb_pull(skb, 2);
203 } else
204 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
205 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
206 skb_pull(skb, 4);
207 }
208 #ifdef CONFIG_ISDN_AUDIO
209 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
210 ISDN_AUDIO_SKB_LOCK(skb) = 0;
211 if (info->vonline & 1) {
212 /* voice conversion/compression */
213 switch (info->emu.vpar[3]) {
214 case 2:
215 case 3:
216 case 4:
217 /* adpcm
218 * Since compressed data takes less
219 * space, we can overwrite the buffer.
220 */
221 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
222 ifmt,
223 skb->data,
224 skb->data,
225 skb->len));
226 break;
227 case 5:
228 /* a-law */
229 if (!ifmt)
230 isdn_audio_ulaw2alaw(skb->data, skb->len);
231 break;
232 case 6:
233 /* u-law */
234 if (ifmt)
235 isdn_audio_alaw2ulaw(skb->data, skb->len);
236 break;
237 }
238 ISDN_AUDIO_SKB_DLECOUNT(skb) =
239 isdn_tty_countDLE(skb->data, skb->len);
240 }
241 #ifdef CONFIG_ISDN_TTY_FAX
242 else {
243 if (info->faxonline & 2) {
244 isdn_tty_fax_bitorder(info, skb);
245 ISDN_AUDIO_SKB_DLECOUNT(skb) =
246 isdn_tty_countDLE(skb->data, skb->len);
247 }
248 }
249 #endif
250 #endif
251 /* Try to deliver directly via tty-flip-buf if queue is empty */
252 spin_lock_irqsave(&info->readlock, flags);
253 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
254 if (isdn_tty_try_read(info, skb)) {
255 spin_unlock_irqrestore(&info->readlock, flags);
256 return 1;
257 }
258 /* Direct deliver failed or queue wasn't empty.
259 * Queue up for later dequeueing via timer-irq.
260 */
261 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
262 dev->drv[di]->rcvcount[channel] +=
263 (skb->len
264 #ifdef CONFIG_ISDN_AUDIO
265 + ISDN_AUDIO_SKB_DLECOUNT(skb)
266 #endif
267 );
268 spin_unlock_irqrestore(&info->readlock, flags);
269 /* Schedule dequeuing */
270 if ((dev->modempoll) && (info->rcvsched))
271 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
272 return 1;
273 }
274
275 void
276 isdn_tty_cleanup_xmit(modem_info * info)
277 {
278 skb_queue_purge(&info->xmit_queue);
279 #ifdef CONFIG_ISDN_AUDIO
280 skb_queue_purge(&info->dtmf_queue);
281 #endif
282 }
283
284 static void
285 isdn_tty_tint(modem_info * info)
286 {
287 struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
288 int len, slen;
289
290 if (!skb)
291 return;
292 len = skb->len;
293 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
294 info->isdn_channel, 1, skb)) == len) {
295 struct tty_struct *tty = info->tty;
296 info->send_outstanding++;
297 info->msr &= ~UART_MSR_CTS;
298 info->lsr &= ~UART_LSR_TEMT;
299 tty_wakeup(tty);
300 return;
301 }
302 if (slen < 0) {
303 /* Error: no channel, already shutdown, or wrong parameter */
304 dev_kfree_skb(skb);
305 return;
306 }
307 skb_queue_head(&info->xmit_queue, skb);
308 }
309
310 #ifdef CONFIG_ISDN_AUDIO
311 static int
312 isdn_tty_countDLE(unsigned char *buf, int len)
313 {
314 int count = 0;
315
316 while (len--)
317 if (*buf++ == DLE)
318 count++;
319 return count;
320 }
321
322 /* This routine is called from within isdn_tty_write() to perform
323 * DLE-decoding when sending audio-data.
324 */
325 static int
326 isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
327 {
328 unsigned char *p = &info->xmit_buf[info->xmit_count];
329 int count = 0;
330
331 while (len > 0) {
332 if (m->lastDLE) {
333 m->lastDLE = 0;
334 switch (*p) {
335 case DLE:
336 /* Escape code */
337 if (len > 1)
338 memmove(p, p + 1, len - 1);
339 p--;
340 count++;
341 break;
342 case ETX:
343 /* End of data */
344 info->vonline |= 4;
345 return count;
346 case DC4:
347 /* Abort RX */
348 info->vonline &= ~1;
349 #ifdef ISDN_DEBUG_MODEM_VOICE
350 printk(KERN_DEBUG
351 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
352 info->line);
353 #endif
354 isdn_tty_at_cout("\020\003", info);
355 if (!info->vonline) {
356 #ifdef ISDN_DEBUG_MODEM_VOICE
357 printk(KERN_DEBUG
358 "DLEdown: send VCON on ttyI%d\n",
359 info->line);
360 #endif
361 isdn_tty_at_cout("\r\nVCON\r\n", info);
362 }
363 /* Fall through */
364 case 'q':
365 case 's':
366 /* Silence */
367 if (len > 1)
368 memmove(p, p + 1, len - 1);
369 p--;
370 break;
371 }
372 } else {
373 if (*p == DLE)
374 m->lastDLE = 1;
375 else
376 count++;
377 }
378 p++;
379 len--;
380 }
381 if (len < 0) {
382 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
383 return 0;
384 }
385 return count;
386 }
387
388 /* This routine is called from within isdn_tty_write() when receiving
389 * audio-data. It interrupts receiving, if an character other than
390 * ^S or ^Q is sent.
391 */
392 static int
393 isdn_tty_end_vrx(const char *buf, int c, int from_user)
394 {
395 char ch;
396
397 while (c--) {
398 if (from_user)
399 get_user(ch, buf);
400 else
401 ch = *buf;
402 if ((ch != 0x11) && (ch != 0x13))
403 return 1;
404 buf++;
405 }
406 return 0;
407 }
408
409 static int voice_cf[7] =
410 {0, 0, 4, 3, 2, 0, 0};
411
412 #endif /* CONFIG_ISDN_AUDIO */
413
414 /* isdn_tty_senddown() is called either directly from within isdn_tty_write()
415 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
416 * outgoing data from the tty's xmit-buffer, handles voice-decompression or
417 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
418 */
419 static void
420 isdn_tty_senddown(modem_info * info)
421 {
422 int buflen;
423 int skb_res;
424 #ifdef CONFIG_ISDN_AUDIO
425 int audio_len;
426 #endif
427 struct sk_buff *skb;
428
429 #ifdef CONFIG_ISDN_AUDIO
430 if (info->vonline & 4) {
431 info->vonline &= ~6;
432 if (!info->vonline) {
433 #ifdef ISDN_DEBUG_MODEM_VOICE
434 printk(KERN_DEBUG
435 "senddown: send VCON on ttyI%d\n",
436 info->line);
437 #endif
438 isdn_tty_at_cout("\r\nVCON\r\n", info);
439 }
440 }
441 #endif
442 if (!(buflen = info->xmit_count))
443 return;
444 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
445 info->msr &= ~UART_MSR_CTS;
446 info->lsr &= ~UART_LSR_TEMT;
447 /* info->xmit_count is modified here and in isdn_tty_write().
448 * So we return here if isdn_tty_write() is in the
449 * critical section.
450 */
451 atomic_inc(&info->xmit_lock);
452 if (!(atomic_dec_and_test(&info->xmit_lock)))
453 return;
454 if (info->isdn_driver < 0) {
455 info->xmit_count = 0;
456 return;
457 }
458 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
459 #ifdef CONFIG_ISDN_AUDIO
460 if (info->vonline & 2)
461 audio_len = buflen * voice_cf[info->emu.vpar[3]];
462 else
463 audio_len = 0;
464 skb = dev_alloc_skb(skb_res + buflen + audio_len);
465 #else
466 skb = dev_alloc_skb(skb_res + buflen);
467 #endif
468 if (!skb) {
469 printk(KERN_WARNING
470 "isdn_tty: Out of memory in ttyI%d senddown\n",
471 info->line);
472 return;
473 }
474 skb_reserve(skb, skb_res);
475 memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
476 info->xmit_count = 0;
477 #ifdef CONFIG_ISDN_AUDIO
478 if (info->vonline & 2) {
479 /* For now, ifmt is fixed to 1 (alaw), since this
480 * is used with ISDN everywhere in the world, except
481 * US, Canada and Japan.
482 * Later, when US-ISDN protocols are implemented,
483 * this setting will depend on the D-channel protocol.
484 */
485 int ifmt = 1;
486
487 /* voice conversion/decompression */
488 switch (info->emu.vpar[3]) {
489 case 2:
490 case 3:
491 case 4:
492 /* adpcm, compatible to ZyXel 1496 modem
493 * with ROM revision 6.01
494 */
495 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
496 ifmt,
497 skb->data,
498 skb_put(skb, audio_len),
499 buflen);
500 skb_pull(skb, buflen);
501 skb_trim(skb, audio_len);
502 break;
503 case 5:
504 /* a-law */
505 if (!ifmt)
506 isdn_audio_alaw2ulaw(skb->data,
507 buflen);
508 break;
509 case 6:
510 /* u-law */
511 if (ifmt)
512 isdn_audio_ulaw2alaw(skb->data,
513 buflen);
514 break;
515 }
516 }
517 #endif /* CONFIG_ISDN_AUDIO */
518 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
519 /* Add T.70 simplified header */
520 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
521 memcpy(skb_push(skb, 2), "\1\0", 2);
522 else
523 memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
524 }
525 skb_queue_tail(&info->xmit_queue, skb);
526 }
527
528 /************************************************************
529 *
530 * Modem-functions
531 *
532 * mostly "stolen" from original Linux-serial.c and friends.
533 *
534 ************************************************************/
535
536 /* The next routine is called once from within timer-interrupt
537 * triggered within isdn_tty_modem_ncarrier(). It calls
538 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
539 * into the tty's flip-buffer.
540 */
541 static void
542 isdn_tty_modem_do_ncarrier(unsigned long data)
543 {
544 modem_info *info = (modem_info *) data;
545 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
546 }
547
548 /* Next routine is called, whenever the DTR-signal is raised.
549 * It checks the ncarrier-flag, and triggers the above routine
550 * when necessary. The ncarrier-flag is set, whenever DTR goes
551 * low.
552 */
553 static void
554 isdn_tty_modem_ncarrier(modem_info * info)
555 {
556 if (info->ncarrier) {
557 info->nc_timer.expires = jiffies + HZ;
558 add_timer(&info->nc_timer);
559 }
560 }
561
562 /*
563 * return the usage calculated by si and layer 2 protocol
564 */
565 int
566 isdn_calc_usage(int si, int l2)
567 {
568 int usg = ISDN_USAGE_MODEM;
569
570 #ifdef CONFIG_ISDN_AUDIO
571 if (si == 1) {
572 switch(l2) {
573 case ISDN_PROTO_L2_MODEM:
574 usg = ISDN_USAGE_MODEM;
575 break;
576 #ifdef CONFIG_ISDN_TTY_FAX
577 case ISDN_PROTO_L2_FAX:
578 usg = ISDN_USAGE_FAX;
579 break;
580 #endif
581 case ISDN_PROTO_L2_TRANS:
582 default:
583 usg = ISDN_USAGE_VOICE;
584 break;
585 }
586 }
587 #endif
588 return(usg);
589 }
590
591 /* isdn_tty_dial() performs dialing of a tty an the necessary
592 * setup of the lower levels before that.
593 */
594 static void
595 isdn_tty_dial(char *n, modem_info * info, atemu * m)
596 {
597 int usg = ISDN_USAGE_MODEM;
598 int si = 7;
599 int l2 = m->mdmreg[REG_L2PROT];
600 u_long flags;
601 isdn_ctrl cmd;
602 int i;
603 int j;
604
605 for (j = 7; j >= 0; j--)
606 if (m->mdmreg[REG_SI1] & (1 << j)) {
607 si = bit2si[j];
608 break;
609 }
610 usg = isdn_calc_usage(si, l2);
611 #ifdef CONFIG_ISDN_AUDIO
612 if ((si == 1) &&
613 (l2 != ISDN_PROTO_L2_MODEM)
614 #ifdef CONFIG_ISDN_TTY_FAX
615 && (l2 != ISDN_PROTO_L2_FAX)
616 #endif
617 ) {
618 l2 = ISDN_PROTO_L2_TRANS;
619 usg = ISDN_USAGE_VOICE;
620 }
621 #endif
622 m->mdmreg[REG_SI1I] = si2bit[si];
623 spin_lock_irqsave(&dev->lock, flags);
624 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
625 if (i < 0) {
626 spin_unlock_irqrestore(&dev->lock, flags);
627 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
628 } else {
629 info->isdn_driver = dev->drvmap[i];
630 info->isdn_channel = dev->chanmap[i];
631 info->drv_index = i;
632 dev->m_idx[i] = info->line;
633 dev->usage[i] |= ISDN_USAGE_OUTGOING;
634 info->last_dir = 1;
635 strcpy(info->last_num, n);
636 isdn_info_update();
637 spin_unlock_irqrestore(&dev->lock, flags);
638 cmd.driver = info->isdn_driver;
639 cmd.arg = info->isdn_channel;
640 cmd.command = ISDN_CMD_CLREAZ;
641 isdn_command(&cmd);
642 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
643 cmd.driver = info->isdn_driver;
644 cmd.command = ISDN_CMD_SETEAZ;
645 isdn_command(&cmd);
646 cmd.driver = info->isdn_driver;
647 cmd.command = ISDN_CMD_SETL2;
648 info->last_l2 = l2;
649 cmd.arg = info->isdn_channel + (l2 << 8);
650 isdn_command(&cmd);
651 cmd.driver = info->isdn_driver;
652 cmd.command = ISDN_CMD_SETL3;
653 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
654 #ifdef CONFIG_ISDN_TTY_FAX
655 if (l2 == ISDN_PROTO_L2_FAX) {
656 cmd.parm.fax = info->fax;
657 info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
658 }
659 #endif
660 isdn_command(&cmd);
661 cmd.driver = info->isdn_driver;
662 cmd.arg = info->isdn_channel;
663 sprintf(cmd.parm.setup.phone, "%s", n);
664 sprintf(cmd.parm.setup.eazmsn, "%s",
665 isdn_map_eaz2msn(m->msn, info->isdn_driver));
666 cmd.parm.setup.si1 = si;
667 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
668 cmd.command = ISDN_CMD_DIAL;
669 info->dialing = 1;
670 info->emu.carrierwait = 0;
671 strcpy(dev->num[i], n);
672 isdn_info_update();
673 isdn_command(&cmd);
674 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
675 }
676 }
677
678 /* isdn_tty_hangup() disassociates a tty from the real
679 * ISDN-line (hangup). The usage-status is cleared
680 * and some cleanup is done also.
681 */
682 void
683 isdn_tty_modem_hup(modem_info * info, int local)
684 {
685 isdn_ctrl cmd;
686 int di, ch;
687
688 if (!info)
689 return;
690
691 di = info->isdn_driver;
692 ch = info->isdn_channel;
693 if (di < 0 || ch < 0)
694 return;
695
696 info->isdn_driver = -1;
697 info->isdn_channel = -1;
698
699 #ifdef ISDN_DEBUG_MODEM_HUP
700 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
701 #endif
702 info->rcvsched = 0;
703 isdn_tty_flush_buffer(info->tty);
704 if (info->online) {
705 info->last_lhup = local;
706 info->online = 0;
707 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
708 }
709 #ifdef CONFIG_ISDN_AUDIO
710 info->vonline = 0;
711 #ifdef CONFIG_ISDN_TTY_FAX
712 info->faxonline = 0;
713 info->fax->phase = ISDN_FAX_PHASE_IDLE;
714 #endif
715 info->emu.vpar[4] = 0;
716 info->emu.vpar[5] = 8;
717 if (info->dtmf_state) {
718 kfree(info->dtmf_state);
719 info->dtmf_state = NULL;
720 }
721 if (info->silence_state) {
722 kfree(info->silence_state);
723 info->silence_state = NULL;
724 }
725 if (info->adpcms) {
726 kfree(info->adpcms);
727 info->adpcms = NULL;
728 }
729 if (info->adpcmr) {
730 kfree(info->adpcmr);
731 info->adpcmr = NULL;
732 }
733 #endif
734 if ((info->msr & UART_MSR_RI) &&
735 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
736 isdn_tty_modem_result(RESULT_RUNG, info);
737 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
738 info->lsr |= UART_LSR_TEMT;
739
740 if (local) {
741 cmd.driver = di;
742 cmd.command = ISDN_CMD_HANGUP;
743 cmd.arg = ch;
744 isdn_command(&cmd);
745 }
746
747 isdn_all_eaz(di, ch);
748 info->emu.mdmreg[REG_RINGCNT] = 0;
749 isdn_free_channel(di, ch, 0);
750
751 if (info->drv_index >= 0) {
752 dev->m_idx[info->drv_index] = -1;
753 info->drv_index = -1;
754 }
755 }
756
757 /*
758 * Begin of a CAPI like interface, currently used only for
759 * supplementary service (CAPI 2.0 part III)
760 */
761 #include <linux/isdn/capicmd.h>
762
763 int
764 isdn_tty_capi_facility(capi_msg *cm) {
765 return(-1); /* dummy */
766 }
767
768 /* isdn_tty_suspend() tries to suspend the current tty connection
769 */
770 static void
771 isdn_tty_suspend(char *id, modem_info * info, atemu * m)
772 {
773 isdn_ctrl cmd;
774
775 int l;
776
777 if (!info)
778 return;
779
780 #ifdef ISDN_DEBUG_MODEM_SERVICES
781 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
782 #endif
783 l = strlen(id);
784 if ((info->isdn_driver >= 0)) {
785 cmd.parm.cmsg.Length = l+18;
786 cmd.parm.cmsg.Command = CAPI_FACILITY;
787 cmd.parm.cmsg.Subcommand = CAPI_REQ;
788 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
789 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
790 cmd.parm.cmsg.para[1] = 0;
791 cmd.parm.cmsg.para[2] = l + 3;
792 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
793 cmd.parm.cmsg.para[4] = 0;
794 cmd.parm.cmsg.para[5] = l;
795 strncpy(&cmd.parm.cmsg.para[6], id, l);
796 cmd.command = CAPI_PUT_MESSAGE;
797 cmd.driver = info->isdn_driver;
798 cmd.arg = info->isdn_channel;
799 isdn_command(&cmd);
800 }
801 }
802
803 /* isdn_tty_resume() tries to resume a suspended call
804 * setup of the lower levels before that. unfortunatly here is no
805 * checking for compatibility of used protocols implemented by Q931
806 * It does the same things like isdn_tty_dial, the last command
807 * is different, may be we can merge it.
808 */
809
810 static void
811 isdn_tty_resume(char *id, modem_info * info, atemu * m)
812 {
813 int usg = ISDN_USAGE_MODEM;
814 int si = 7;
815 int l2 = m->mdmreg[REG_L2PROT];
816 isdn_ctrl cmd;
817 ulong flags;
818 int i;
819 int j;
820 int l;
821
822 l = strlen(id);
823 for (j = 7; j >= 0; j--)
824 if (m->mdmreg[REG_SI1] & (1 << j)) {
825 si = bit2si[j];
826 break;
827 }
828 usg = isdn_calc_usage(si, l2);
829 #ifdef CONFIG_ISDN_AUDIO
830 if ((si == 1) &&
831 (l2 != ISDN_PROTO_L2_MODEM)
832 #ifdef CONFIG_ISDN_TTY_FAX
833 && (l2 != ISDN_PROTO_L2_FAX)
834 #endif
835 ) {
836 l2 = ISDN_PROTO_L2_TRANS;
837 usg = ISDN_USAGE_VOICE;
838 }
839 #endif
840 m->mdmreg[REG_SI1I] = si2bit[si];
841 spin_lock_irqsave(&dev->lock, flags);
842 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
843 if (i < 0) {
844 spin_unlock_irqrestore(&dev->lock, flags);
845 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
846 } else {
847 info->isdn_driver = dev->drvmap[i];
848 info->isdn_channel = dev->chanmap[i];
849 info->drv_index = i;
850 dev->m_idx[i] = info->line;
851 dev->usage[i] |= ISDN_USAGE_OUTGOING;
852 info->last_dir = 1;
853 // strcpy(info->last_num, n);
854 isdn_info_update();
855 spin_unlock_irqrestore(&dev->lock, flags);
856 cmd.driver = info->isdn_driver;
857 cmd.arg = info->isdn_channel;
858 cmd.command = ISDN_CMD_CLREAZ;
859 isdn_command(&cmd);
860 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
861 cmd.driver = info->isdn_driver;
862 cmd.command = ISDN_CMD_SETEAZ;
863 isdn_command(&cmd);
864 cmd.driver = info->isdn_driver;
865 cmd.command = ISDN_CMD_SETL2;
866 info->last_l2 = l2;
867 cmd.arg = info->isdn_channel + (l2 << 8);
868 isdn_command(&cmd);
869 cmd.driver = info->isdn_driver;
870 cmd.command = ISDN_CMD_SETL3;
871 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
872 isdn_command(&cmd);
873 cmd.driver = info->isdn_driver;
874 cmd.arg = info->isdn_channel;
875 cmd.parm.cmsg.Length = l+18;
876 cmd.parm.cmsg.Command = CAPI_FACILITY;
877 cmd.parm.cmsg.Subcommand = CAPI_REQ;
878 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
879 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
880 cmd.parm.cmsg.para[1] = 0;
881 cmd.parm.cmsg.para[2] = l+3;
882 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
883 cmd.parm.cmsg.para[4] = 0;
884 cmd.parm.cmsg.para[5] = l;
885 strncpy(&cmd.parm.cmsg.para[6], id, l);
886 cmd.command =CAPI_PUT_MESSAGE;
887 info->dialing = 1;
888 // strcpy(dev->num[i], n);
889 isdn_info_update();
890 isdn_command(&cmd);
891 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
892 }
893 }
894
895 /* isdn_tty_send_msg() sends a message to a HL driver
896 * This is used for hybrid modem cards to send AT commands to it
897 */
898
899 static void
900 isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
901 {
902 int usg = ISDN_USAGE_MODEM;
903 int si = 7;
904 int l2 = m->mdmreg[REG_L2PROT];
905 isdn_ctrl cmd;
906 ulong flags;
907 int i;
908 int j;
909 int l;
910
911 l = strlen(msg);
912 if (!l) {
913 isdn_tty_modem_result(RESULT_ERROR, info);
914 return;
915 }
916 for (j = 7; j >= 0; j--)
917 if (m->mdmreg[REG_SI1] & (1 << j)) {
918 si = bit2si[j];
919 break;
920 }
921 usg = isdn_calc_usage(si, l2);
922 #ifdef CONFIG_ISDN_AUDIO
923 if ((si == 1) &&
924 (l2 != ISDN_PROTO_L2_MODEM)
925 #ifdef CONFIG_ISDN_TTY_FAX
926 && (l2 != ISDN_PROTO_L2_FAX)
927 #endif
928 ) {
929 l2 = ISDN_PROTO_L2_TRANS;
930 usg = ISDN_USAGE_VOICE;
931 }
932 #endif
933 m->mdmreg[REG_SI1I] = si2bit[si];
934 spin_lock_irqsave(&dev->lock, flags);
935 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
936 if (i < 0) {
937 spin_unlock_irqrestore(&dev->lock, flags);
938 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
939 } else {
940 info->isdn_driver = dev->drvmap[i];
941 info->isdn_channel = dev->chanmap[i];
942 info->drv_index = i;
943 dev->m_idx[i] = info->line;
944 dev->usage[i] |= ISDN_USAGE_OUTGOING;
945 info->last_dir = 1;
946 isdn_info_update();
947 spin_unlock_irqrestore(&dev->lock, flags);
948 cmd.driver = info->isdn_driver;
949 cmd.arg = info->isdn_channel;
950 cmd.command = ISDN_CMD_CLREAZ;
951 isdn_command(&cmd);
952 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
953 cmd.driver = info->isdn_driver;
954 cmd.command = ISDN_CMD_SETEAZ;
955 isdn_command(&cmd);
956 cmd.driver = info->isdn_driver;
957 cmd.command = ISDN_CMD_SETL2;
958 info->last_l2 = l2;
959 cmd.arg = info->isdn_channel + (l2 << 8);
960 isdn_command(&cmd);
961 cmd.driver = info->isdn_driver;
962 cmd.command = ISDN_CMD_SETL3;
963 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
964 isdn_command(&cmd);
965 cmd.driver = info->isdn_driver;
966 cmd.arg = info->isdn_channel;
967 cmd.parm.cmsg.Length = l+14;
968 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
969 cmd.parm.cmsg.Subcommand = CAPI_REQ;
970 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
971 cmd.parm.cmsg.para[0] = l+1;
972 strncpy(&cmd.parm.cmsg.para[1], msg, l);
973 cmd.parm.cmsg.para[l+1] = 0xd;
974 cmd.command =CAPI_PUT_MESSAGE;
975 /* info->dialing = 1;
976 strcpy(dev->num[i], n);
977 isdn_info_update();
978 */
979 isdn_command(&cmd);
980 }
981 }
982
983 static inline int
984 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
985 {
986 #ifdef MODEM_PARANOIA_CHECK
987 if (!info) {
988 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
989 name, routine);
990 return 1;
991 }
992 if (info->magic != ISDN_ASYNC_MAGIC) {
993 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
994 name, routine);
995 return 1;
996 }
997 #endif
998 return 0;
999 }
1000
1001 /*
1002 * This routine is called to set the UART divisor registers to match
1003 * the specified baud rate for a serial port.
1004 */
1005 static void
1006 isdn_tty_change_speed(modem_info * info)
1007 {
1008 uint cflag,
1009 cval,
1010 fcr,
1011 quot;
1012 int i;
1013
1014 if (!info->tty || !info->tty->termios)
1015 return;
1016 cflag = info->tty->termios->c_cflag;
1017
1018 quot = i = cflag & CBAUD;
1019 if (i & CBAUDEX) {
1020 i &= ~CBAUDEX;
1021 if (i < 1 || i > 2)
1022 info->tty->termios->c_cflag &= ~CBAUDEX;
1023 else
1024 i += 15;
1025 }
1026 if (quot) {
1027 info->mcr |= UART_MCR_DTR;
1028 isdn_tty_modem_ncarrier(info);
1029 } else {
1030 info->mcr &= ~UART_MCR_DTR;
1031 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1032 #ifdef ISDN_DEBUG_MODEM_HUP
1033 printk(KERN_DEBUG "Mhup in changespeed\n");
1034 #endif
1035 if (info->online)
1036 info->ncarrier = 1;
1037 isdn_tty_modem_reset_regs(info, 0);
1038 isdn_tty_modem_hup(info, 1);
1039 }
1040 return;
1041 }
1042 /* byte size and parity */
1043 cval = cflag & (CSIZE | CSTOPB);
1044 cval >>= 4;
1045 if (cflag & PARENB)
1046 cval |= UART_LCR_PARITY;
1047 if (!(cflag & PARODD))
1048 cval |= UART_LCR_EPAR;
1049 fcr = 0;
1050
1051 /* CTS flow control flag and modem status interrupts */
1052 if (cflag & CRTSCTS) {
1053 info->flags |= ISDN_ASYNC_CTS_FLOW;
1054 } else
1055 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1056 if (cflag & CLOCAL)
1057 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1058 else {
1059 info->flags |= ISDN_ASYNC_CHECK_CD;
1060 }
1061 }
1062
1063 static int
1064 isdn_tty_startup(modem_info * info)
1065 {
1066 if (info->flags & ISDN_ASYNC_INITIALIZED)
1067 return 0;
1068 isdn_lock_drivers();
1069 #ifdef ISDN_DEBUG_MODEM_OPEN
1070 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1071 #endif
1072 /*
1073 * Now, initialize the UART
1074 */
1075 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1076 if (info->tty)
1077 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1078 /*
1079 * and set the speed of the serial port
1080 */
1081 isdn_tty_change_speed(info);
1082
1083 info->flags |= ISDN_ASYNC_INITIALIZED;
1084 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1085 info->send_outstanding = 0;
1086 return 0;
1087 }
1088
1089 /*
1090 * This routine will shutdown a serial port; interrupts are disabled, and
1091 * DTR is dropped if the hangup on close termio flag is on.
1092 */
1093 static void
1094 isdn_tty_shutdown(modem_info * info)
1095 {
1096 if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1097 return;
1098 #ifdef ISDN_DEBUG_MODEM_OPEN
1099 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1100 #endif
1101 isdn_unlock_drivers();
1102 info->msr &= ~UART_MSR_RI;
1103 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1104 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1105 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1106 isdn_tty_modem_reset_regs(info, 0);
1107 #ifdef ISDN_DEBUG_MODEM_HUP
1108 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1109 #endif
1110 isdn_tty_modem_hup(info, 1);
1111 }
1112 }
1113 if (info->tty)
1114 set_bit(TTY_IO_ERROR, &info->tty->flags);
1115
1116 info->flags &= ~ISDN_ASYNC_INITIALIZED;
1117 }
1118
1119 /* isdn_tty_write() is the main send-routine. It is called from the upper
1120 * levels within the kernel to perform sending data. Depending on the
1121 * online-flag it either directs output to the at-command-interpreter or
1122 * to the lower level. Additional tasks done here:
1123 * - If online, check for escape-sequence (+++)
1124 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1125 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1126 * - If dialing, abort dial.
1127 */
1128 static int
1129 isdn_tty_write(struct tty_struct *tty, int from_user, const u_char * buf, int count)
1130 {
1131 int c;
1132 int total = 0;
1133 modem_info *info = (modem_info *) tty->driver_data;
1134 atemu *m = &info->emu;
1135
1136 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1137 return 0;
1138 if (from_user)
1139 down(&info->write_sem);
1140 /* See isdn_tty_senddown() */
1141 atomic_inc(&info->xmit_lock);
1142 while (1) {
1143 c = count;
1144 if (c > info->xmit_size - info->xmit_count)
1145 c = info->xmit_size - info->xmit_count;
1146 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1147 c = dev->drv[info->isdn_driver]->maxbufsize;
1148 if (c <= 0)
1149 break;
1150 if ((info->online > 1)
1151 #ifdef CONFIG_ISDN_AUDIO
1152 || (info->vonline & 3)
1153 #endif
1154 ) {
1155 #ifdef CONFIG_ISDN_AUDIO
1156 if (!info->vonline)
1157 #endif
1158 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1159 &(m->pluscount),
1160 &(m->lastplus),
1161 from_user);
1162 if (from_user)
1163 copy_from_user(&(info->xmit_buf[info->xmit_count]), buf, c);
1164 else
1165 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1166 #ifdef CONFIG_ISDN_AUDIO
1167 if (info->vonline) {
1168 int cc = isdn_tty_handleDLEdown(info, m, c);
1169 if (info->vonline & 2) {
1170 if (!cc) {
1171 /* If DLE decoding results in zero-transmit, but
1172 * c originally was non-zero, do a wakeup.
1173 */
1174 tty_wakeup(tty);
1175 info->msr |= UART_MSR_CTS;
1176 info->lsr |= UART_LSR_TEMT;
1177 }
1178 info->xmit_count += cc;
1179 }
1180 if ((info->vonline & 3) == 1) {
1181 /* Do NOT handle Ctrl-Q or Ctrl-S
1182 * when in full-duplex audio mode.
1183 */
1184 if (isdn_tty_end_vrx(buf, c, from_user)) {
1185 info->vonline &= ~1;
1186 #ifdef ISDN_DEBUG_MODEM_VOICE
1187 printk(KERN_DEBUG
1188 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1189 info->line);
1190 #endif
1191 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1192 }
1193 }
1194 } else
1195 if (TTY_IS_FCLASS1(info)) {
1196 int cc = isdn_tty_handleDLEdown(info, m, c);
1197
1198 if (info->vonline & 4) { /* ETX seen */
1199 isdn_ctrl c;
1200
1201 c.command = ISDN_CMD_FAXCMD;
1202 c.driver = info->isdn_driver;
1203 c.arg = info->isdn_channel;
1204 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1205 c.parm.aux.subcmd = ETX;
1206 isdn_command(&c);
1207 }
1208 info->vonline = 0;
1209 #ifdef ISDN_DEBUG_MODEM_VOICE
1210 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1211 #endif
1212 info->xmit_count += cc;
1213 } else
1214 #endif
1215 info->xmit_count += c;
1216 } else {
1217 info->msr |= UART_MSR_CTS;
1218 info->lsr |= UART_LSR_TEMT;
1219 if (info->dialing) {
1220 info->dialing = 0;
1221 #ifdef ISDN_DEBUG_MODEM_HUP
1222 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1223 #endif
1224 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1225 isdn_tty_modem_hup(info, 1);
1226 } else
1227 c = isdn_tty_edit_at(buf, c, info, from_user);
1228 }
1229 buf += c;
1230 count -= c;
1231 total += c;
1232 }
1233 atomic_dec(&info->xmit_lock);
1234 if ((info->xmit_count) || (skb_queue_len(&info->xmit_queue))) {
1235 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1236 isdn_tty_senddown(info);
1237 isdn_tty_tint(info);
1238 }
1239 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1240 }
1241 if (from_user)
1242 up(&info->write_sem);
1243 return total;
1244 }
1245
1246 static int
1247 isdn_tty_write_room(struct tty_struct *tty)
1248 {
1249 modem_info *info = (modem_info *) tty->driver_data;
1250 int ret;
1251
1252 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1253 return 0;
1254 if (!info->online)
1255 return info->xmit_size;
1256 ret = info->xmit_size - info->xmit_count;
1257 return (ret < 0) ? 0 : ret;
1258 }
1259
1260 static int
1261 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1262 {
1263 modem_info *info = (modem_info *) tty->driver_data;
1264
1265 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1266 return 0;
1267 if (!info->online)
1268 return 0;
1269 return (info->xmit_count);
1270 }
1271
1272 static void
1273 isdn_tty_flush_buffer(struct tty_struct *tty)
1274 {
1275 modem_info *info;
1276
1277 if (!tty) {
1278 return;
1279 }
1280 info = (modem_info *) tty->driver_data;
1281 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1282 return;
1283 }
1284 isdn_tty_cleanup_xmit(info);
1285 info->xmit_count = 0;
1286 wake_up_interruptible(&tty->write_wait);
1287 tty_wakeup(tty);
1288 }
1289
1290 static void
1291 isdn_tty_flush_chars(struct tty_struct *tty)
1292 {
1293 modem_info *info = (modem_info *) tty->driver_data;
1294
1295 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1296 return;
1297 if ((info->xmit_count) || (skb_queue_len(&info->xmit_queue)))
1298 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1299 }
1300
1301 /*
1302 * ------------------------------------------------------------
1303 * isdn_tty_throttle()
1304 *
1305 * This routine is called by the upper-layer tty layer to signal that
1306 * incoming characters should be throttled.
1307 * ------------------------------------------------------------
1308 */
1309 static void
1310 isdn_tty_throttle(struct tty_struct *tty)
1311 {
1312 modem_info *info = (modem_info *) tty->driver_data;
1313
1314 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1315 return;
1316 if (I_IXOFF(tty))
1317 info->x_char = STOP_CHAR(tty);
1318 info->mcr &= ~UART_MCR_RTS;
1319 }
1320
1321 static void
1322 isdn_tty_unthrottle(struct tty_struct *tty)
1323 {
1324 modem_info *info = (modem_info *) tty->driver_data;
1325
1326 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1327 return;
1328 if (I_IXOFF(tty)) {
1329 if (info->x_char)
1330 info->x_char = 0;
1331 else
1332 info->x_char = START_CHAR(tty);
1333 }
1334 info->mcr |= UART_MCR_RTS;
1335 }
1336
1337 /*
1338 * ------------------------------------------------------------
1339 * isdn_tty_ioctl() and friends
1340 * ------------------------------------------------------------
1341 */
1342
1343 /*
1344 * isdn_tty_get_lsr_info - get line status register info
1345 *
1346 * Purpose: Let user call ioctl() to get info when the UART physically
1347 * is emptied. On bus types like RS485, the transmitter must
1348 * release the bus after transmitting. This must be done when
1349 * the transmit shift register is empty, not be done when the
1350 * transmit holding register is empty. This functionality
1351 * allows RS485 driver to be written in user space.
1352 */
1353 static int
1354 isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1355 {
1356 u_char status;
1357 uint result;
1358
1359 status = info->lsr;
1360 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1361 return put_user(result, value);
1362 }
1363
1364
1365 static int
1366 isdn_tty_tiocmget(struct tty_struct *tty, struct file *file)
1367 {
1368 modem_info *info = (modem_info *) tty->driver_data;
1369 u_char control, status;
1370
1371 if (isdn_tty_paranoia_check(info, tty->name, __FUNCTION__))
1372 return -ENODEV;
1373 if (tty->flags & (1 << TTY_IO_ERROR))
1374 return -EIO;
1375
1376 #ifdef ISDN_DEBUG_MODEM_IOCTL
1377 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1378 #endif
1379
1380 control = info->mcr;
1381 status = info->msr;
1382 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1383 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1384 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1385 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1386 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1387 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1388 }
1389
1390 static int
1391 isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
1392 unsigned int set, unsigned int clear)
1393 {
1394 modem_info *info = (modem_info *) tty->driver_data;
1395
1396 if (isdn_tty_paranoia_check(info, tty->name, __FUNCTION__))
1397 return -ENODEV;
1398 if (tty->flags & (1 << TTY_IO_ERROR))
1399 return -EIO;
1400
1401 #ifdef ISDN_DEBUG_MODEM_IOCTL
1402 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1403 #endif
1404
1405 if (set & TIOCM_RTS)
1406 info->mcr |= UART_MCR_RTS;
1407 if (set & TIOCM_DTR) {
1408 info->mcr |= UART_MCR_DTR;
1409 isdn_tty_modem_ncarrier(info);
1410 }
1411
1412 if (clear & TIOCM_RTS)
1413 info->mcr &= ~UART_MCR_RTS;
1414 if (clear & TIOCM_DTR) {
1415 info->mcr &= ~UART_MCR_DTR;
1416 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1417 isdn_tty_modem_reset_regs(info, 0);
1418 #ifdef ISDN_DEBUG_MODEM_HUP
1419 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1420 #endif
1421 if (info->online)
1422 info->ncarrier = 1;
1423 isdn_tty_modem_hup(info, 1);
1424 }
1425 }
1426 return 0;
1427 }
1428
1429 static int
1430 isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
1431 uint cmd, ulong arg)
1432 {
1433 modem_info *info = (modem_info *) tty->driver_data;
1434 int retval;
1435
1436 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1437 return -ENODEV;
1438 if (tty->flags & (1 << TTY_IO_ERROR))
1439 return -EIO;
1440 switch (cmd) {
1441 case TCSBRK: /* SVID version: non-zero arg --> no break */
1442 #ifdef ISDN_DEBUG_MODEM_IOCTL
1443 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1444 #endif
1445 retval = tty_check_change(tty);
1446 if (retval)
1447 return retval;
1448 tty_wait_until_sent(tty, 0);
1449 return 0;
1450 case TCSBRKP: /* support for POSIX tcsendbreak() */
1451 #ifdef ISDN_DEBUG_MODEM_IOCTL
1452 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1453 #endif
1454 retval = tty_check_change(tty);
1455 if (retval)
1456 return retval;
1457 tty_wait_until_sent(tty, 0);
1458 return 0;
1459 case TIOCGSOFTCAR:
1460 #ifdef ISDN_DEBUG_MODEM_IOCTL
1461 printk(KERN_DEBUG "ttyI%d ioctl TIOCGSOFTCAR\n", info->line);
1462 #endif
1463 return put_user(C_CLOCAL(tty) ? 1 : 0, (ulong __user *) arg);
1464 case TIOCSSOFTCAR:
1465 #ifdef ISDN_DEBUG_MODEM_IOCTL
1466 printk(KERN_DEBUG "ttyI%d ioctl TIOCSSOFTCAR\n", info->line);
1467 #endif
1468 if (get_user(arg, (ulong __user *) arg))
1469 return -EFAULT;
1470 tty->termios->c_cflag =
1471 ((tty->termios->c_cflag & ~CLOCAL) |
1472 (arg ? CLOCAL : 0));
1473 return 0;
1474 case TIOCSERGETLSR: /* Get line status register */
1475 #ifdef ISDN_DEBUG_MODEM_IOCTL
1476 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1477 #endif
1478 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1479 default:
1480 #ifdef ISDN_DEBUG_MODEM_IOCTL
1481 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1482 #endif
1483 return -ENOIOCTLCMD;
1484 }
1485 return 0;
1486 }
1487
1488 static void
1489 isdn_tty_set_termios(struct tty_struct *tty, struct termios *old_termios)
1490 {
1491 modem_info *info = (modem_info *) tty->driver_data;
1492
1493 if (!old_termios)
1494 isdn_tty_change_speed(info);
1495 else {
1496 if (tty->termios->c_cflag == old_termios->c_cflag)
1497 return;
1498 isdn_tty_change_speed(info);
1499 if ((old_termios->c_cflag & CRTSCTS) &&
1500 !(tty->termios->c_cflag & CRTSCTS)) {
1501 tty->hw_stopped = 0;
1502 }
1503 }
1504 }
1505
1506 /*
1507 * ------------------------------------------------------------
1508 * isdn_tty_open() and friends
1509 * ------------------------------------------------------------
1510 */
1511 static int
1512 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1513 {
1514 DECLARE_WAITQUEUE(wait, NULL);
1515 int do_clocal = 0;
1516 int retval;
1517
1518 /*
1519 * If the device is in the middle of being closed, then block
1520 * until it's done, and then try again.
1521 */
1522 if (tty_hung_up_p(filp) ||
1523 (info->flags & ISDN_ASYNC_CLOSING)) {
1524 if (info->flags & ISDN_ASYNC_CLOSING)
1525 interruptible_sleep_on(&info->close_wait);
1526 #ifdef MODEM_DO_RESTART
1527 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1528 return -EAGAIN;
1529 else
1530 return -ERESTARTSYS;
1531 #else
1532 return -EAGAIN;
1533 #endif
1534 }
1535 /*
1536 * If non-blocking mode is set, then make the check up front
1537 * and then exit.
1538 */
1539 if ((filp->f_flags & O_NONBLOCK) ||
1540 (tty->flags & (1 << TTY_IO_ERROR))) {
1541 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1542 return -EBUSY;
1543 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1544 return 0;
1545 }
1546 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1547 if (info->normal_termios.c_cflag & CLOCAL)
1548 do_clocal = 1;
1549 } else {
1550 if (tty->termios->c_cflag & CLOCAL)
1551 do_clocal = 1;
1552 }
1553 /*
1554 * Block waiting for the carrier detect and the line to become
1555 * free (i.e., not in use by the callout). While we are in
1556 * this loop, info->count is dropped by one, so that
1557 * isdn_tty_close() knows when to free things. We restore it upon
1558 * exit, either normal or abnormal.
1559 */
1560 retval = 0;
1561 add_wait_queue(&info->open_wait, &wait);
1562 #ifdef ISDN_DEBUG_MODEM_OPEN
1563 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1564 info->line, info->count);
1565 #endif
1566 if (!(tty_hung_up_p(filp)))
1567 info->count--;
1568 info->blocked_open++;
1569 while (1) {
1570 set_current_state(TASK_INTERRUPTIBLE);
1571 if (tty_hung_up_p(filp) ||
1572 !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1573 #ifdef MODEM_DO_RESTART
1574 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1575 retval = -EAGAIN;
1576 else
1577 retval = -ERESTARTSYS;
1578 #else
1579 retval = -EAGAIN;
1580 #endif
1581 break;
1582 }
1583 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1584 !(info->flags & ISDN_ASYNC_CLOSING) &&
1585 (do_clocal || (info->msr & UART_MSR_DCD))) {
1586 break;
1587 }
1588 if (signal_pending(current)) {
1589 retval = -ERESTARTSYS;
1590 break;
1591 }
1592 #ifdef ISDN_DEBUG_MODEM_OPEN
1593 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1594 info->line, info->count);
1595 #endif
1596 schedule();
1597 }
1598 current->state = TASK_RUNNING;
1599 remove_wait_queue(&info->open_wait, &wait);
1600 if (!tty_hung_up_p(filp))
1601 info->count++;
1602 info->blocked_open--;
1603 #ifdef ISDN_DEBUG_MODEM_OPEN
1604 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1605 info->line, info->count);
1606 #endif
1607 if (retval)
1608 return retval;
1609 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1610 return 0;
1611 }
1612
1613 /*
1614 * This routine is called whenever a serial port is opened. It
1615 * enables interrupts for a serial port, linking in its async structure into
1616 * the IRQ chain. It also performs the serial-specific
1617 * initialization for the tty structure.
1618 */
1619 static int
1620 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1621 {
1622 modem_info *info;
1623 int retval, line;
1624
1625 line = tty->index;
1626 if (line < 0 || line > ISDN_MAX_CHANNELS)
1627 return -ENODEV;
1628 info = &dev->mdm.info[line];
1629 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1630 return -ENODEV;
1631 if (!try_module_get(info->owner)) {
1632 printk(KERN_WARNING "%s: cannot reserve module\n", __FUNCTION__);
1633 return -ENODEV;
1634 }
1635 #ifdef ISDN_DEBUG_MODEM_OPEN
1636 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1637 info->count);
1638 #endif
1639 info->count++;
1640 tty->driver_data = info;
1641 info->tty = tty;
1642 /*
1643 * Start up serial port
1644 */
1645 retval = isdn_tty_startup(info);
1646 if (retval) {
1647 #ifdef ISDN_DEBUG_MODEM_OPEN
1648 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1649 #endif
1650 module_put(info->owner);
1651 return retval;
1652 }
1653 retval = isdn_tty_block_til_ready(tty, filp, info);
1654 if (retval) {
1655 #ifdef ISDN_DEBUG_MODEM_OPEN
1656 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1657 #endif
1658 module_put(info->owner);
1659 return retval;
1660 }
1661 #ifdef ISDN_DEBUG_MODEM_OPEN
1662 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1663 #endif
1664 dev->modempoll++;
1665 #ifdef ISDN_DEBUG_MODEM_OPEN
1666 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1667 #endif
1668 return 0;
1669 }
1670
1671 static void
1672 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1673 {
1674 modem_info *info = (modem_info *) tty->driver_data;
1675 ulong timeout;
1676
1677 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1678 return;
1679 if (tty_hung_up_p(filp)) {
1680 #ifdef ISDN_DEBUG_MODEM_OPEN
1681 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1682 #endif
1683 return;
1684 }
1685 if ((tty->count == 1) && (info->count != 1)) {
1686 /*
1687 * Uh, oh. tty->count is 1, which means that the tty
1688 * structure will be freed. Info->count should always
1689 * be one in these conditions. If it's greater than
1690 * one, we've got real problems, since it means the
1691 * serial port won't be shutdown.
1692 */
1693 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1694 "info->count is %d\n", info->count);
1695 info->count = 1;
1696 }
1697 if (--info->count < 0) {
1698 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1699 info->line, info->count);
1700 info->count = 0;
1701 }
1702 if (info->count) {
1703 #ifdef ISDN_DEBUG_MODEM_OPEN
1704 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1705 #endif
1706 return;
1707 }
1708 info->flags |= ISDN_ASYNC_CLOSING;
1709 /*
1710 * Save the termios structure, since this port may have
1711 * separate termios for callout and dialin.
1712 */
1713 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1714 info->normal_termios = *tty->termios;
1715 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1716 info->callout_termios = *tty->termios;
1717
1718 tty->closing = 1;
1719 /*
1720 * At this point we stop accepting input. To do this, we
1721 * disable the receive line status interrupts, and tell the
1722 * interrupt driver to stop checking the data ready bit in the
1723 * line status register.
1724 */
1725 if (info->flags & ISDN_ASYNC_INITIALIZED) {
1726 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1727 /*
1728 * Before we drop DTR, make sure the UART transmitter
1729 * has completely drained; this is especially
1730 * important if there is a transmit FIFO!
1731 */
1732 timeout = jiffies + HZ;
1733 while (!(info->lsr & UART_LSR_TEMT)) {
1734 set_current_state(TASK_INTERRUPTIBLE);
1735 schedule_timeout(20);
1736 if (time_after(jiffies,timeout))
1737 break;
1738 }
1739 }
1740 dev->modempoll--;
1741 isdn_tty_shutdown(info);
1742
1743 if (tty->driver->flush_buffer)
1744 tty->driver->flush_buffer(tty);
1745 tty_ldisc_flush(tty);
1746 info->tty = NULL;
1747 info->ncarrier = 0;
1748 tty->closing = 0;
1749 module_put(info->owner);
1750 if (info->blocked_open) {
1751 set_current_state(TASK_INTERRUPTIBLE);
1752 schedule_timeout(HZ/2);
1753 wake_up_interruptible(&info->open_wait);
1754 }
1755 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1756 wake_up_interruptible(&info->close_wait);
1757 #ifdef ISDN_DEBUG_MODEM_OPEN
1758 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1759 #endif
1760 }
1761
1762 /*
1763 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1764 */
1765 static void
1766 isdn_tty_hangup(struct tty_struct *tty)
1767 {
1768 modem_info *info = (modem_info *) tty->driver_data;
1769
1770 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1771 return;
1772 isdn_tty_shutdown(info);
1773 info->count = 0;
1774 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1775 info->tty = NULL;
1776 wake_up_interruptible(&info->open_wait);
1777 }
1778
1779 /* This routine initializes all emulator-data.
1780 */
1781 static void
1782 isdn_tty_reset_profile(atemu * m)
1783 {
1784 m->profile[0] = 0;
1785 m->profile[1] = 0;
1786 m->profile[2] = 43;
1787 m->profile[3] = 13;
1788 m->profile[4] = 10;
1789 m->profile[5] = 8;
1790 m->profile[6] = 3;
1791 m->profile[7] = 60;
1792 m->profile[8] = 2;
1793 m->profile[9] = 6;
1794 m->profile[10] = 7;
1795 m->profile[11] = 70;
1796 m->profile[12] = 0x45;
1797 m->profile[13] = 4;
1798 m->profile[14] = ISDN_PROTO_L2_X75I;
1799 m->profile[15] = ISDN_PROTO_L3_TRANS;
1800 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1801 m->profile[17] = ISDN_MODEM_WINSIZE;
1802 m->profile[18] = 4;
1803 m->profile[19] = 0;
1804 m->profile[20] = 0;
1805 m->profile[23] = 0;
1806 m->pmsn[0] = '\0';
1807 m->plmsn[0] = '\0';
1808 }
1809
1810 #ifdef CONFIG_ISDN_AUDIO
1811 static void
1812 isdn_tty_modem_reset_vpar(atemu * m)
1813 {
1814 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1815 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1816 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1817 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1818 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1819 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1820 }
1821 #endif
1822
1823 #ifdef CONFIG_ISDN_TTY_FAX
1824 static void
1825 isdn_tty_modem_reset_faxpar(modem_info * info)
1826 {
1827 T30_s *f = info->fax;
1828
1829 f->code = 0;
1830 f->phase = ISDN_FAX_PHASE_IDLE;
1831 f->direction = 0;
1832 f->resolution = 1; /* fine */
1833 f->rate = 5; /* 14400 bit/s */
1834 f->width = 0;
1835 f->length = 0;
1836 f->compression = 0;
1837 f->ecm = 0;
1838 f->binary = 0;
1839 f->scantime = 0;
1840 memset(&f->id[0], 32, FAXIDLEN - 1);
1841 f->id[FAXIDLEN - 1] = 0;
1842 f->badlin = 0;
1843 f->badmul = 0;
1844 f->bor = 0;
1845 f->nbc = 0;
1846 f->cq = 0;
1847 f->cr = 0;
1848 f->ctcrty = 0;
1849 f->minsp = 0;
1850 f->phcto = 30;
1851 f->rel = 0;
1852 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1853 f->pollid[FAXIDLEN - 1] = 0;
1854 }
1855 #endif
1856
1857 static void
1858 isdn_tty_modem_reset_regs(modem_info * info, int force)
1859 {
1860 atemu *m = &info->emu;
1861 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1862 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1863 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1864 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1865 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1866 }
1867 #ifdef CONFIG_ISDN_AUDIO
1868 isdn_tty_modem_reset_vpar(m);
1869 #endif
1870 #ifdef CONFIG_ISDN_TTY_FAX
1871 isdn_tty_modem_reset_faxpar(info);
1872 #endif
1873 m->mdmcmdl = 0;
1874 }
1875
1876 static void
1877 modem_write_profile(atemu * m)
1878 {
1879 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1880 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1881 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1882 if (dev->profd)
1883 send_sig(SIGIO, dev->profd, 1);
1884 }
1885
1886 static struct tty_operations modem_ops = {
1887 .open = isdn_tty_open,
1888 .close = isdn_tty_close,
1889 .write = isdn_tty_write,
1890 .flush_chars = isdn_tty_flush_chars,
1891 .write_room = isdn_tty_write_room,
1892 .chars_in_buffer = isdn_tty_chars_in_buffer,
1893 .flush_buffer = isdn_tty_flush_buffer,
1894 .ioctl = isdn_tty_ioctl,
1895 .throttle = isdn_tty_throttle,
1896 .unthrottle = isdn_tty_unthrottle,
1897 .set_termios = isdn_tty_set_termios,
1898 .hangup = isdn_tty_hangup,
1899 .tiocmget = isdn_tty_tiocmget,
1900 .tiocmset = isdn_tty_tiocmset,
1901 };
1902
1903 int
1904 isdn_tty_modem_init(void)
1905 {
1906 isdn_modem_t *m;
1907 int i, retval;
1908 modem_info *info;
1909
1910 m = &dev->mdm;
1911 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1912 if (!m->tty_modem)
1913 return -ENOMEM;
1914 m->tty_modem->name = "ttyI";
1915 m->tty_modem->devfs_name = "isdn/ttyI";
1916 m->tty_modem->major = ISDN_TTY_MAJOR;
1917 m->tty_modem->minor_start = 0;
1918 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1919 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1920 m->tty_modem->init_termios = tty_std_termios;
1921 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1922 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
1923 m->tty_modem->driver_name = "isdn_tty";
1924 tty_set_operations(m->tty_modem, &modem_ops);
1925 retval = tty_register_driver(m->tty_modem);
1926 if (retval) {
1927 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1928 goto err;
1929 }
1930 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1931 info = &m->info[i];
1932 #ifdef CONFIG_ISDN_TTY_FAX
1933 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1934 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1935 retval = -ENOMEM;
1936 goto err_unregister;
1937 }
1938 #endif
1939 #ifdef MODULE
1940 info->owner = THIS_MODULE;
1941 #endif
1942 spin_lock_init(&info->readlock);
1943 init_MUTEX(&info->write_sem);
1944 sprintf(info->last_cause, "0000");
1945 sprintf(info->last_num, "none");
1946 info->last_dir = 0;
1947 info->last_lhup = 1;
1948 info->last_l2 = -1;
1949 info->last_si = 0;
1950 isdn_tty_reset_profile(&info->emu);
1951 isdn_tty_modem_reset_regs(info, 1);
1952 info->magic = ISDN_ASYNC_MAGIC;
1953 info->line = i;
1954 info->tty = NULL;
1955 info->x_char = 0;
1956 info->count = 0;
1957 info->blocked_open = 0;
1958 init_waitqueue_head(&info->open_wait);
1959 init_waitqueue_head(&info->close_wait);
1960 info->isdn_driver = -1;
1961 info->isdn_channel = -1;
1962 info->drv_index = -1;
1963 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1964 init_timer(&info->nc_timer);
1965 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1966 info->nc_timer.data = (unsigned long) info;
1967 skb_queue_head_init(&info->xmit_queue);
1968 #ifdef CONFIG_ISDN_AUDIO
1969 skb_queue_head_init(&info->dtmf_queue);
1970 #endif
1971 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1972 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1973 retval = -ENOMEM;
1974 goto err_unregister;
1975 }
1976 /* Make room for T.70 header */
1977 info->xmit_buf += 4;
1978 }
1979 return 0;
1980 err_unregister:
1981 for (i--; i >= 0; i--) {
1982 info = &m->info[i];
1983 #ifdef CONFIG_ISDN_TTY_FAX
1984 kfree(info->fax);
1985 #endif
1986 kfree(info->xmit_buf - 4);
1987 }
1988 tty_unregister_driver(m->tty_modem);
1989 err:
1990 put_tty_driver(m->tty_modem);
1991 m->tty_modem = NULL;
1992 return retval;
1993 }
1994
1995 void
1996 isdn_tty_exit(void)
1997 {
1998 modem_info *info;
1999 int i;
2000
2001 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2002 info = &dev->mdm.info[i];
2003 isdn_tty_cleanup_xmit(info);
2004 #ifdef CONFIG_ISDN_TTY_FAX
2005 kfree(info->fax);
2006 #endif
2007 kfree(info->xmit_buf - 4);
2008 }
2009 tty_unregister_driver(dev->mdm.tty_modem);
2010 put_tty_driver(dev->mdm.tty_modem);
2011 dev->mdm.tty_modem = NULL;
2012 }
2013
2014
2015 /*
2016 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
2017 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
2018 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
2019 */
2020
2021 static int
2022 isdn_tty_match_icall(char *cid, atemu *emu, int di)
2023 {
2024 #ifdef ISDN_DEBUG_MODEM_ICALL
2025 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
2026 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
2027 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
2028 #endif
2029 if (strlen(emu->lmsn)) {
2030 char *p = emu->lmsn;
2031 char *q;
2032 int tmp;
2033 int ret = 0;
2034
2035 while (1) {
2036 if ((q = strchr(p, ';')))
2037 *q = '\0';
2038 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2039 ret = tmp;
2040 #ifdef ISDN_DEBUG_MODEM_ICALL
2041 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2042 p, isdn_map_eaz2msn(emu->msn, di), tmp);
2043 #endif
2044 if (q) {
2045 *q = ';';
2046 p = q;
2047 p++;
2048 }
2049 if (!tmp)
2050 return 0;
2051 if (!q)
2052 break;
2053 }
2054 return ret;
2055 } else {
2056 int tmp;
2057 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2058 #ifdef ISDN_DEBUG_MODEM_ICALL
2059 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2060 isdn_map_eaz2msn(emu->msn, di), tmp);
2061 #endif
2062 return tmp;
2063 }
2064 }
2065
2066 /*
2067 * An incoming call-request has arrived.
2068 * Search the tty-devices for an appropriate device and bind
2069 * it to the ISDN-Channel.
2070 * Return:
2071 *
2072 * 0 = No matching device found.
2073 * 1 = A matching device found.
2074 * 3 = No match found, but eventually would match, if
2075 * CID is longer.
2076 */
2077 int
2078 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2079 {
2080 char *eaz;
2081 int i;
2082 int wret;
2083 int idx;
2084 int si1;
2085 int si2;
2086 char *nr;
2087 ulong flags;
2088
2089 if (!setup->phone[0]) {
2090 nr = "0";
2091 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2092 } else
2093 nr = setup->phone;
2094 si1 = (int) setup->si1;
2095 si2 = (int) setup->si2;
2096 if (!setup->eazmsn[0]) {
2097 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2098 eaz = "0";
2099 } else
2100 eaz = setup->eazmsn;
2101 #ifdef ISDN_DEBUG_MODEM_ICALL
2102 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2103 #endif
2104 wret = 0;
2105 spin_lock_irqsave(&dev->lock, flags);
2106 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2107 modem_info *info = &dev->mdm.info[i];
2108
2109 if (info->count == 0)
2110 continue;
2111 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
2112 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
2113 idx = isdn_dc2minor(di, ch);
2114 #ifdef ISDN_DEBUG_MODEM_ICALL
2115 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2116 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2117 info->flags, info->isdn_driver, info->isdn_channel,
2118 dev->usage[idx]);
2119 #endif
2120 if (
2121 #ifndef FIX_FILE_TRANSFER
2122 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2123 #endif
2124 (info->isdn_driver == -1) &&
2125 (info->isdn_channel == -1) &&
2126 (USG_NONE(dev->usage[idx]))) {
2127 int matchret;
2128
2129 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2130 wret = matchret;
2131 if (!matchret) { /* EAZ is matching */
2132 info->isdn_driver = di;
2133 info->isdn_channel = ch;
2134 info->drv_index = idx;
2135 dev->m_idx[idx] = info->line;
2136 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2137 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2138 strcpy(dev->num[idx], nr);
2139 strcpy(info->emu.cpn, eaz);
2140 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2141 info->emu.mdmreg[REG_PLAN] = setup->plan;
2142 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2143 isdn_info_update();
2144 spin_unlock_irqrestore(&dev->lock, flags);
2145 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2146 info->line);
2147 info->msr |= UART_MSR_RI;
2148 isdn_tty_modem_result(RESULT_RING, info);
2149 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2150 return 1;
2151 }
2152 }
2153 }
2154 }
2155 spin_unlock_irqrestore(&dev->lock, flags);
2156 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2157 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2158 return (wret == 2)?3:0;
2159 }
2160
2161 #define TTY_IS_ACTIVE(info) \
2162 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2163
2164 int
2165 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2166 {
2167 int mi;
2168 modem_info *info;
2169 char *e;
2170
2171 if (i < 0)
2172 return 0;
2173 if ((mi = dev->m_idx[i]) >= 0) {
2174 info = &dev->mdm.info[mi];
2175 switch (c->command) {
2176 case ISDN_STAT_CINF:
2177 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2178 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2179 if (e == (char *)c->parm.num)
2180 info->emu.charge = 0;
2181
2182 break;
2183 case ISDN_STAT_BSENT:
2184 #ifdef ISDN_TTY_STAT_DEBUG
2185 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2186 #endif
2187 if ((info->isdn_driver == c->driver) &&
2188 (info->isdn_channel == c->arg)) {
2189 info->msr |= UART_MSR_CTS;
2190 if (info->send_outstanding)
2191 if (!(--info->send_outstanding))
2192 info->lsr |= UART_LSR_TEMT;
2193 isdn_tty_tint(info);
2194 return 1;
2195 }
2196 break;
2197 case ISDN_STAT_CAUSE:
2198 #ifdef ISDN_TTY_STAT_DEBUG
2199 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2200 #endif
2201 /* Signal cause to tty-device */
2202 strncpy(info->last_cause, c->parm.num, 5);
2203 return 1;
2204 case ISDN_STAT_DISPLAY:
2205 #ifdef ISDN_TTY_STAT_DEBUG
2206 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2207 #endif
2208 /* Signal display to tty-device */
2209 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2210 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2211 isdn_tty_at_cout("\r\n", info);
2212 isdn_tty_at_cout("DISPLAY: ", info);
2213 isdn_tty_at_cout(c->parm.display, info);
2214 isdn_tty_at_cout("\r\n", info);
2215 }
2216 return 1;
2217 case ISDN_STAT_DCONN:
2218 #ifdef ISDN_TTY_STAT_DEBUG
2219 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2220 #endif
2221 if (TTY_IS_ACTIVE(info)) {
2222 if (info->dialing == 1) {
2223 info->dialing = 2;
2224 return 1;
2225 }
2226 }
2227 break;
2228 case ISDN_STAT_DHUP:
2229 #ifdef ISDN_TTY_STAT_DEBUG
2230 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2231 #endif
2232 if (TTY_IS_ACTIVE(info)) {
2233 if (info->dialing == 1)
2234 isdn_tty_modem_result(RESULT_BUSY, info);
2235 if (info->dialing > 1)
2236 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2237 info->dialing = 0;
2238 #ifdef ISDN_DEBUG_MODEM_HUP
2239 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2240 #endif
2241 isdn_tty_modem_hup(info, 0);
2242 return 1;
2243 }
2244 break;
2245 case ISDN_STAT_BCONN:
2246 #ifdef ISDN_TTY_STAT_DEBUG
2247 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2248 #endif
2249 /* Wake up any processes waiting
2250 * for incoming call of this device when
2251 * DCD follow the state of incoming carrier
2252 */
2253 if (info->blocked_open &&
2254 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2255 wake_up_interruptible(&info->open_wait);
2256 }
2257
2258 /* Schedule CONNECT-Message to any tty
2259 * waiting for it and
2260 * set DCD-bit of its modem-status.
2261 */
2262 if (TTY_IS_ACTIVE(info) ||
2263 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2264 info->msr |= UART_MSR_DCD;
2265 info->emu.charge = 0;
2266 if (info->dialing & 0xf)
2267 info->last_dir = 1;
2268 else
2269 info->last_dir = 0;
2270 info->dialing = 0;
2271 info->rcvsched = 1;
2272 if (USG_MODEM(dev->usage[i])) {
2273 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2274 strcpy(info->emu.connmsg, c->parm.num);
2275 isdn_tty_modem_result(RESULT_CONNECT, info);
2276 } else
2277 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2278 }
2279 if (USG_VOICE(dev->usage[i]))
2280 isdn_tty_modem_result(RESULT_VCON, info);
2281 return 1;
2282 }
2283 break;
2284 case ISDN_STAT_BHUP:
2285 #ifdef ISDN_TTY_STAT_DEBUG
2286 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2287 #endif
2288 if (TTY_IS_ACTIVE(info)) {
2289 #ifdef ISDN_DEBUG_MODEM_HUP
2290 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2291 #endif
2292 isdn_tty_modem_hup(info, 0);
2293 return 1;
2294 }
2295 break;
2296 case ISDN_STAT_NODCH:
2297 #ifdef ISDN_TTY_STAT_DEBUG
2298 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2299 #endif
2300 if (TTY_IS_ACTIVE(info)) {
2301 if (info->dialing) {
2302 info->dialing = 0;
2303 info->last_l2 = -1;
2304 info->last_si = 0;
2305 sprintf(info->last_cause, "0000");
2306 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2307 }
2308 isdn_tty_modem_hup(info, 0);
2309 return 1;
2310 }
2311 break;
2312 case ISDN_STAT_UNLOAD:
2313 #ifdef ISDN_TTY_STAT_DEBUG
2314 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2315 #endif
2316 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2317 info = &dev->mdm.info[i];
2318 if (info->isdn_driver == c->driver) {
2319 if (info->online)
2320 isdn_tty_modem_hup(info, 1);
2321 }
2322 }
2323 return 1;
2324 #ifdef CONFIG_ISDN_TTY_FAX
2325 case ISDN_STAT_FAXIND:
2326 if (TTY_IS_ACTIVE(info)) {
2327 isdn_tty_fax_command(info, c);
2328 }
2329 break;
2330 #endif
2331 #ifdef CONFIG_ISDN_AUDIO
2332 case ISDN_STAT_AUDIO:
2333 if (TTY_IS_ACTIVE(info)) {
2334 switch(c->parm.num[0]) {
2335 case ISDN_AUDIO_DTMF:
2336 if (info->vonline) {
2337 isdn_audio_put_dle_code(info,
2338 c->parm.num[1]);
2339 }
2340 break;
2341 }
2342 }
2343 break;
2344 #endif
2345 }
2346 }
2347 return 0;
2348 }
2349
2350 /*********************************************************************
2351 Modem-Emulator-Routines
2352 *********************************************************************/
2353
2354 #define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2355
2356 /*
2357 * Put a message from the AT-emulator into receive-buffer of tty,
2358 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2359 */
2360 void
2361 isdn_tty_at_cout(char *msg, modem_info * info)
2362 {
2363 struct tty_struct *tty;
2364 atemu *m = &info->emu;
2365 char *p;
2366 char c;
2367 u_long flags;
2368 struct sk_buff *skb = NULL;
2369 char *sp = NULL;
2370
2371 if (!msg) {
2372 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2373 return;
2374 }
2375 spin_lock_irqsave(&info->readlock, flags);
2376 tty = info->tty;
2377 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2378 spin_unlock_irqrestore(&info->readlock, flags);
2379 return;
2380 }
2381
2382 /* use queue instead of direct flip, if online and */
2383 /* data is in queue or flip buffer is full */
2384 if ((info->online) && (((tty->flip.count + strlen(msg)) >= TTY_FLIPBUF_SIZE) ||
2385 (!skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel])))) {
2386 skb = alloc_skb(strlen(msg), GFP_ATOMIC);
2387 if (!skb) {
2388 spin_unlock_irqrestore(&info->readlock, flags);
2389 return;
2390 }
2391 sp = skb_put(skb, strlen(msg));
2392 #ifdef CONFIG_ISDN_AUDIO
2393 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2394 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2395 #endif
2396 }
2397
2398 for (p = msg; *p; p++) {
2399 switch (*p) {
2400 case '\r':
2401 c = m->mdmreg[REG_CR];
2402 break;
2403 case '\n':
2404 c = m->mdmreg[REG_LF];
2405 break;
2406 case '\b':
2407 c = m->mdmreg[REG_BS];
2408 break;
2409 default:
2410 c = *p;
2411 }
2412 if (skb) {
2413 *sp++ = c;
2414 } else {
2415 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
2416 break;
2417 tty_insert_flip_char(tty, c, 0);
2418 }
2419 }
2420 if (skb) {
2421 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2422 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2423 spin_unlock_irqrestore(&info->readlock, flags);
2424 /* Schedule dequeuing */
2425 if ((dev->modempoll) && (info->rcvsched))
2426 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2427
2428 } else {
2429 spin_unlock_irqrestore(&info->readlock, flags);
2430 schedule_delayed_work(&tty->flip.work, 1);
2431 }
2432 }
2433
2434 /*
2435 * Perform ATH Hangup
2436 */
2437 static void
2438 isdn_tty_on_hook(modem_info * info)
2439 {
2440 if (info->isdn_channel >= 0) {
2441 #ifdef ISDN_DEBUG_MODEM_HUP
2442 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2443 #endif
2444 isdn_tty_modem_hup(info, 1);
2445 }
2446 }
2447
2448 static void
2449 isdn_tty_off_hook(void)
2450 {
2451 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2452 }
2453
2454 #define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
2455 #define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
2456
2457 /*
2458 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2459 * isdn_tty_modem_escape() if sequence found.
2460 *
2461 * Parameters:
2462 * p pointer to databuffer
2463 * plus escape-character
2464 * count length of buffer
2465 * pluscount count of valid escape-characters so far
2466 * lastplus timestamp of last character
2467 */
2468 static void
2469 isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2470 u_long *lastplus, int from_user)
2471 {
2472 char cbuf[3];
2473
2474 if (plus > 127)
2475 return;
2476 if (count > 3) {
2477 p += count - 3;
2478 count = 3;
2479 *pluscount = 0;
2480 }
2481 if (from_user) {
2482 copy_from_user(cbuf, p, count);
2483 p = cbuf;
2484 }
2485 while (count > 0) {
2486 if (*(p++) == plus) {
2487 if ((*pluscount)++) {
2488 /* Time since last '+' > 0.5 sec. ? */
2489 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2490 *pluscount = 1;
2491 } else {
2492 /* Time since last non-'+' < 1.5 sec. ? */
2493 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2494 *pluscount = 0;
2495 }
2496 if ((*pluscount == 3) && (count == 1))
2497 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2498 if (*pluscount > 3)
2499 *pluscount = 1;
2500 } else
2501 *pluscount = 0;
2502 *lastplus = jiffies;
2503 count--;
2504 }
2505 }
2506
2507 /*
2508 * Return result of AT-emulator to tty-receive-buffer, depending on
2509 * modem-register 12, bit 0 and 1.
2510 * For CONNECT-messages also switch to online-mode.
2511 * For RING-message handle auto-ATA if register 0 != 0
2512 */
2513
2514 static void
2515 isdn_tty_modem_result(int code, modem_info * info)
2516 {
2517 atemu *m = &info->emu;
2518 static char *msg[] =
2519 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2520 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2521 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2522 char s[ISDN_MSNLEN+10];
2523
2524 switch (code) {
2525 case RESULT_RING:
2526 m->mdmreg[REG_RINGCNT]++;
2527 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2528 /* Automatically accept incoming call */
2529 isdn_tty_cmd_ATA(info);
2530 break;
2531 case RESULT_NO_CARRIER:
2532 #ifdef ISDN_DEBUG_MODEM_HUP
2533 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2534 (info->flags & ISDN_ASYNC_CLOSING),
2535 (!info->tty));
2536 #endif
2537 m->mdmreg[REG_RINGCNT] = 0;
2538 del_timer(&info->nc_timer);
2539 info->ncarrier = 0;
2540 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2541 return;
2542 }
2543 #ifdef CONFIG_ISDN_AUDIO
2544 if (info->vonline & 1) {
2545 #ifdef ISDN_DEBUG_MODEM_VOICE
2546 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2547 info->line);
2548 #endif
2549 /* voice-recording, add DLE-ETX */
2550 isdn_tty_at_cout("\020\003", info);
2551 }
2552 if (info->vonline & 2) {
2553 #ifdef ISDN_DEBUG_MODEM_VOICE
2554 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2555 info->line);
2556 #endif
2557 /* voice-playing, add DLE-DC4 */
2558 isdn_tty_at_cout("\020\024", info);
2559 }
2560 #endif
2561 break;
2562 case RESULT_CONNECT:
2563 case RESULT_CONNECT64000:
2564 sprintf(info->last_cause, "0000");
2565 if (!info->online)
2566 info->online = 2;
2567 break;
2568 case RESULT_VCON:
2569 #ifdef ISDN_DEBUG_MODEM_VOICE
2570 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2571 info->line);
2572 #endif
2573 sprintf(info->last_cause, "0000");
2574 if (!info->online)
2575 info->online = 1;
2576 break;
2577 } /* switch(code) */
2578
2579 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2580 /* Show results */
2581 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2582 /* Show numeric results only */
2583 sprintf(s, "\r\n%d\r\n", code);
2584 isdn_tty_at_cout(s, info);
2585 } else {
2586 if (code == RESULT_RING) {
2587 /* return if "show RUNG" and ringcounter>1 */
2588 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2589 (m->mdmreg[REG_RINGCNT] > 1))
2590 return;
2591 /* print CID, _before_ _every_ ring */
2592 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2593 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2594 isdn_tty_at_cout(dev->num[info->drv_index], info);
2595 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2596 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2597 isdn_tty_at_cout(info->emu.cpn, info);
2598 }
2599 }
2600 }
2601 isdn_tty_at_cout("\r\n", info);
2602 isdn_tty_at_cout(msg[code], info);
2603 switch (code) {
2604 case RESULT_CONNECT:
2605 switch (m->mdmreg[REG_L2PROT]) {
2606 case ISDN_PROTO_L2_MODEM:
2607 isdn_tty_at_cout(" ", info);
2608 isdn_tty_at_cout(m->connmsg, info);
2609 break;
2610 }
2611 break;
2612 case RESULT_RING:
2613 /* Append CPN, if enabled */
2614 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2615 sprintf(s, "/%s", m->cpn);
2616 isdn_tty_at_cout(s, info);
2617 }
2618 /* Print CID only once, _after_ 1st RING */
2619 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2620 (m->mdmreg[REG_RINGCNT] == 1)) {
2621 isdn_tty_at_cout("\r\n", info);
2622 isdn_tty_at_cout("CALLER NUMBER: ", info);
2623 isdn_tty_at_cout(dev->num[info->drv_index], info);
2624 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2625 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2626 isdn_tty_at_cout(info->emu.cpn, info);
2627 }
2628 }
2629 break;
2630 case RESULT_NO_CARRIER:
2631 case RESULT_NO_DIALTONE:
2632 case RESULT_BUSY:
2633 case RESULT_NO_ANSWER:
2634 m->mdmreg[REG_RINGCNT] = 0;
2635 /* Append Cause-Message if enabled */
2636 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2637 sprintf(s, "/%s", info->last_cause);
2638 isdn_tty_at_cout(s, info);
2639 }
2640 break;
2641 case RESULT_CONNECT64000:
2642 /* Append Protocol to CONNECT message */
2643 switch (m->mdmreg[REG_L2PROT]) {
2644 case ISDN_PROTO_L2_X75I:
2645 case ISDN_PROTO_L2_X75UI:
2646 case ISDN_PROTO_L2_X75BUI:
2647 isdn_tty_at_cout("/X.75", info);
2648 break;
2649 case ISDN_PROTO_L2_HDLC:
2650 isdn_tty_at_cout("/HDLC", info);
2651 break;
2652 case ISDN_PROTO_L2_V11096:
2653 isdn_tty_at_cout("/V110/9600", info);
2654 break;
2655 case ISDN_PROTO_L2_V11019:
2656 isdn_tty_at_cout("/V110/19200", info);
2657 break;
2658 case ISDN_PROTO_L2_V11038:
2659 isdn_tty_at_cout("/V110/38400", info);
2660 break;
2661 }
2662 if (m->mdmreg[REG_T70] & BIT_T70) {
2663 isdn_tty_at_cout("/T.70", info);
2664 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2665 isdn_tty_at_cout("+", info);
2666 }
2667 break;
2668 }
2669 isdn_tty_at_cout("\r\n", info);
2670 }
2671 }
2672 if (code == RESULT_NO_CARRIER) {
2673 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2674 return;
2675 }
2676 tty_ldisc_flush(info->tty);
2677 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2678 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2679 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2680 tty_hangup(info->tty);
2681 }
2682 }
2683 }
2684
2685
2686 /*
2687 * Display a modem-register-value.
2688 */
2689 static void
2690 isdn_tty_show_profile(int ridx, modem_info * info)
2691 {
2692 char v[6];
2693
2694 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2695 isdn_tty_at_cout(v, info);
2696 }
2697
2698 /*
2699 * Get MSN-string from char-pointer, set pointer to end of number
2700 */
2701 static void
2702 isdn_tty_get_msnstr(char *n, char **p)
2703 {
2704 int limit = ISDN_MSNLEN - 1;
2705
2706 while (((*p[0] >= '0' && *p[0] <= '9') ||
2707 /* Why a comma ??? */
2708 (*p[0] == ',') || (*p[0] == ':')) &&
2709 (limit--))
2710 *n++ = *p[0]++;
2711 *n = '\0';
2712 }
2713
2714 /*
2715 * Get phone-number from modem-commandbuffer
2716 */
2717 static void
2718 isdn_tty_getdial(char *p, char *q,int cnt)
2719 {
2720 int first = 1;
2721 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2722 buffer overflow */
2723
2724 while (strchr(" 0123456789,#.*WPTS-", *p) && *p && --cnt>0) {
2725 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2726 (*p == '*') || (*p == '#')) {
2727 *q++ = *p;
2728 limit--;
2729 }
2730 if(!limit)
2731 break;
2732 p++;
2733 first = 0;
2734 }
2735 *q = 0;
2736 }
2737
2738 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2739 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2740
2741 static void
2742 isdn_tty_report(modem_info * info)
2743 {
2744 atemu *m = &info->emu;
2745 char s[80];
2746
2747 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2748 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2749 isdn_tty_at_cout(s, info);
2750 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2751 isdn_tty_at_cout(s, info);
2752 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2753 switch (info->last_l2) {
2754 case ISDN_PROTO_L2_X75I:
2755 isdn_tty_at_cout("X.75i", info);
2756 break;
2757 case ISDN_PROTO_L2_X75UI:
2758 isdn_tty_at_cout("X.75ui", info);
2759 break;
2760 case ISDN_PROTO_L2_X75BUI:
2761 isdn_tty_at_cout("X.75bui", info);
2762 break;
2763 case ISDN_PROTO_L2_HDLC:
2764 isdn_tty_at_cout("HDLC", info);
2765 break;
2766 case ISDN_PROTO_L2_V11096:
2767 isdn_tty_at_cout("V.110 9600 Baud", info);
2768 break;
2769 case ISDN_PROTO_L2_V11019:
2770 isdn_tty_at_cout("V.110 19200 Baud", info);
2771 break;
2772 case ISDN_PROTO_L2_V11038:
2773 isdn_tty_at_cout("V.110 38400 Baud", info);
2774 break;
2775 case ISDN_PROTO_L2_TRANS:
2776 isdn_tty_at_cout("transparent", info);
2777 break;
2778 case ISDN_PROTO_L2_MODEM:
2779 isdn_tty_at_cout("modem", info);
2780 break;
2781 case ISDN_PROTO_L2_FAX:
2782 isdn_tty_at_cout("fax", info);
2783 break;
2784 default:
2785 isdn_tty_at_cout("unknown", info);
2786 break;
2787 }
2788 if (m->mdmreg[REG_T70] & BIT_T70) {
2789 isdn_tty_at_cout("/T.70", info);
2790 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2791 isdn_tty_at_cout("+", info);
2792 }
2793 isdn_tty_at_cout("\r\n", info);
2794 isdn_tty_at_cout(" Service: ", info);
2795 switch (info->last_si) {
2796 case 1:
2797 isdn_tty_at_cout("audio\r\n", info);
2798 break;
2799 case 5:
2800 isdn_tty_at_cout("btx\r\n", info);
2801 break;
2802 case 7:
2803 isdn_tty_at_cout("data\r\n", info);
2804 break;
2805 default:
2806 sprintf(s, "%d\r\n", info->last_si);
2807 isdn_tty_at_cout(s, info);
2808 break;
2809 }
2810 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2811 isdn_tty_at_cout(s, info);
2812 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2813 isdn_tty_at_cout(s, info);
2814 }
2815
2816 /*
2817 * Parse AT&.. commands.
2818 */
2819 static int
2820 isdn_tty_cmd_ATand(char **p, modem_info * info)
2821 {
2822 atemu *m = &info->emu;
2823 int i;
2824 char rb[100];
2825
2826 #define MAXRB (sizeof(rb) - 1)
2827
2828 switch (*p[0]) {
2829 case 'B':
2830 /* &B - Set Buffersize */
2831 p[0]++;
2832 i = isdn_getnum(p);
2833 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2834 PARSE_ERROR1;
2835 #ifdef CONFIG_ISDN_AUDIO
2836 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2837 PARSE_ERROR1;
2838 #endif
2839 m->mdmreg[REG_PSIZE] = i / 16;
2840 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2841 switch (m->mdmreg[REG_L2PROT]) {
2842 case ISDN_PROTO_L2_V11096:
2843 case ISDN_PROTO_L2_V11019:
2844 case ISDN_PROTO_L2_V11038:
2845 info->xmit_size /= 10;
2846 }
2847 break;
2848 case 'C':
2849 /* &C - DCD Status */
2850 p[0]++;
2851 switch (isdn_getnum(p)) {
2852 case 0:
2853 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2854 break;
2855 case 1:
2856 m->mdmreg[REG_DCD] |= BIT_DCD;
2857 break;
2858 default:
2859 PARSE_ERROR1
2860 }
2861 break;
2862 case 'D':
2863 /* &D - Set DTR-Low-behavior */
2864 p[0]++;
2865 switch (isdn_getnum(p)) {
2866 case 0:
2867 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2868 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2869 break;
2870 case 2:
2871 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2872 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2873 break;
2874 case 3:
2875 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2876 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2877 break;
2878 default:
2879 PARSE_ERROR1
2880 }
2881 break;
2882 case 'E':
2883 /* &E -Set EAZ/MSN */
2884 p[0]++;
2885 isdn_tty_get_msnstr(m->msn, p);
2886 break;
2887 case 'F':
2888 /* &F -Set Factory-Defaults */
2889 p[0]++;
2890 if (info->msr & UART_MSR_DCD)
2891 PARSE_ERROR1;
2892 isdn_tty_reset_profile(m);
2893 isdn_tty_modem_reset_regs(info, 1);
2894 break;
2895 #ifdef DUMMY_HAYES_AT
2896 case 'K':
2897 /* only for be compilant with common scripts */
2898 /* &K Flowcontrol - no function */
2899 p[0]++;
2900 isdn_getnum(p);
2901 break;
2902 #endif
2903 case 'L':
2904 /* &L -Set Numbers to listen on */
2905 p[0]++;
2906 i = 0;
2907 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2908 (i < ISDN_LMSNLEN))
2909 m->lmsn[i++] = *p[0]++;
2910 m->lmsn[i] = '\0';
2911 break;
2912 case 'R':
2913 /* &R - Set V.110 bitrate adaption */
2914 p[0]++;
2915 i = isdn_getnum(p);
2916 switch (i) {
2917 case 0:
2918 /* Switch off V.110, back to X.75 */
2919 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2920 m->mdmreg[REG_SI2] = 0;
2921 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2922 break;
2923 case 9600:
2924 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2925 m->mdmreg[REG_SI2] = 197;
2926 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2927 break;
2928 case 19200:
2929 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2930 m->mdmreg[REG_SI2] = 199;
2931 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2932 break;
2933 case 38400:
2934 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2935 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2936 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2937 break;
2938 default:
2939 PARSE_ERROR1;
2940 }
2941 /* Switch off T.70 */
2942 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2943 /* Set Service 7 */
2944 m->mdmreg[REG_SI1] |= 4;
2945 break;
2946 case 'S':
2947 /* &S - Set Windowsize */
2948 p[0]++;
2949 i = isdn_getnum(p);
2950 if ((i > 0) && (i < 9))
2951 m->mdmreg[REG_WSIZE] = i;
2952 else
2953 PARSE_ERROR1;
2954 break;
2955 case 'V':
2956 /* &V - Show registers */
2957 p[0]++;
2958 isdn_tty_at_cout("\r\n", info);
2959 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2960 sprintf(rb, "S%02d=%03d%s", i,
2961 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2962 isdn_tty_at_cout(rb, info);
2963 }
2964 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2965 strlen(m->msn) ? m->msn : "None");
2966 isdn_tty_at_cout(rb, info);
2967 if (strlen(m->lmsn)) {
2968 isdn_tty_at_cout("\r\nListen: ", info);
2969 isdn_tty_at_cout(m->lmsn, info);
2970 isdn_tty_at_cout("\r\n", info);
2971 }
2972 break;
2973 case 'W':
2974 /* &W - Write Profile */
2975 p[0]++;
2976 switch (*p[0]) {
2977 case '0':
2978 p[0]++;
2979 modem_write_profile(m);
2980 break;
2981 default:
2982 PARSE_ERROR1;
2983 }
2984 break;
2985 case 'X':
2986 /* &X - Switch to BTX-Mode and T.70 */
2987 p[0]++;
2988 switch (isdn_getnum(p)) {
2989 case 0:
2990 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2991 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2992 break;
2993 case 1:
2994 m->mdmreg[REG_T70] |= BIT_T70;
2995 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2996 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2997 info->xmit_size = 112;
2998 m->mdmreg[REG_SI1] = 4;
2999 m->mdmreg[REG_SI2] = 0;
3000 break;
3001 case 2:
3002 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
3003 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3004 info->xmit_size = 112;
3005 m->mdmreg[REG_SI1] = 4;
3006 m->mdmreg[REG_SI2] = 0;
3007 break;
3008 default:
3009 PARSE_ERROR1;
3010 }
3011 break;
3012 default:
3013 PARSE_ERROR1;
3014 }
3015 return 0;
3016 }
3017
3018 static int
3019 isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
3020 {
3021 /* Some plausibility checks */
3022 switch (mreg) {
3023 case REG_L2PROT:
3024 if (mval > ISDN_PROTO_L2_MAX)
3025 return 1;
3026 break;
3027 case REG_PSIZE:
3028 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
3029 return 1;
3030 #ifdef CONFIG_ISDN_AUDIO
3031 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
3032 return 1;
3033 #endif
3034 info->xmit_size = mval * 16;
3035 switch (m->mdmreg[REG_L2PROT]) {
3036 case ISDN_PROTO_L2_V11096:
3037 case ISDN_PROTO_L2_V11019:
3038 case ISDN_PROTO_L2_V11038:
3039 info->xmit_size /= 10;
3040 }
3041 break;
3042 case REG_SI1I:
3043 case REG_PLAN:
3044 case REG_SCREEN:
3045 /* readonly registers */
3046 return 1;
3047 }
3048 return 0;
3049 }
3050
3051 /*
3052 * Perform ATS command
3053 */
3054 static int
3055 isdn_tty_cmd_ATS(char **p, modem_info * info)
3056 {
3057 atemu *m = &info->emu;
3058 int bitpos;
3059 int mreg;
3060 int mval;
3061 int bval;
3062
3063 mreg = isdn_getnum(p);
3064 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3065 PARSE_ERROR1;
3066 switch (*p[0]) {
3067 case '=':
3068 p[0]++;
3069 mval = isdn_getnum(p);
3070 if (mval < 0 || mval > 255)
3071 PARSE_ERROR1;
3072 if (isdn_tty_check_ats(mreg, mval, info, m))
3073 PARSE_ERROR1;
3074 m->mdmreg[mreg] = mval;
3075 break;
3076 case '.':
3077 /* Set/Clear a single bit */
3078 p[0]++;
3079 bitpos = isdn_getnum(p);
3080 if ((bitpos < 0) || (bitpos > 7))
3081 PARSE_ERROR1;
3082 switch (*p[0]) {
3083 case '=':
3084 p[0]++;
3085 bval = isdn_getnum(p);
3086 if (bval < 0 || bval > 1)
3087 PARSE_ERROR1;
3088 if (bval)
3089 mval = m->mdmreg[mreg] | (1 << bitpos);
3090 else
3091 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3092 if (isdn_tty_check_ats(mreg, mval, info, m))
3093 PARSE_ERROR1;
3094 m->mdmreg[mreg] = mval;
3095 break;
3096 case '?':
3097 p[0]++;
3098 isdn_tty_at_cout("\r\n", info);
3099 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3100 info);
3101 break;
3102 default:
3103 PARSE_ERROR1;
3104 }
3105 break;
3106 case '?':
3107 p[0]++;
3108 isdn_tty_show_profile(mreg, info);
3109 break;
3110 default:
3111 PARSE_ERROR1;
3112 break;
3113 }
3114 return 0;
3115 }
3116
3117 /*
3118 * Perform ATA command
3119 */
3120 static void
3121 isdn_tty_cmd_ATA(modem_info * info)
3122 {
3123 atemu *m = &info->emu;
3124 isdn_ctrl cmd;
3125 int l2;
3126
3127 if (info->msr & UART_MSR_RI) {
3128 /* Accept incoming call */
3129 info->last_dir = 0;
3130 strcpy(info->last_num, dev->num[info->drv_index]);
3131 m->mdmreg[REG_RINGCNT] = 0;
3132 info->msr &= ~UART_MSR_RI;
3133 l2 = m->mdmreg[REG_L2PROT];
3134 #ifdef CONFIG_ISDN_AUDIO
3135 /* If more than one bit set in reg18, autoselect Layer2 */
3136 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3137 if (m->mdmreg[REG_SI1I] == 1) {
3138 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3139 l2 = ISDN_PROTO_L2_TRANS;
3140 } else
3141 l2 = ISDN_PROTO_L2_X75I;
3142 }
3143 #endif
3144 cmd.driver = info->isdn_driver;
3145 cmd.command = ISDN_CMD_SETL2;
3146 cmd.arg = info->isdn_channel + (l2 << 8);
3147 info->last_l2 = l2;
3148 isdn_command(&cmd);
3149 cmd.driver = info->isdn_driver;
3150 cmd.command = ISDN_CMD_SETL3;
3151 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3152 #ifdef CONFIG_ISDN_TTY_FAX
3153 if (l2 == ISDN_PROTO_L2_FAX) {
3154 cmd.parm.fax = info->fax;
3155 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3156 }
3157 #endif
3158 isdn_command(&cmd);
3159 cmd.driver = info->isdn_driver;
3160 cmd.arg = info->isdn_channel;
3161 cmd.command = ISDN_CMD_ACCEPTD;
3162 info->dialing = 16;
3163 info->emu.carrierwait = 0;
3164 isdn_command(&cmd);
3165 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3166 } else
3167 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3168 }
3169
3170 #ifdef CONFIG_ISDN_AUDIO
3171 /*
3172 * Parse AT+F.. commands
3173 */
3174 static int
3175 isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3176 {
3177 atemu *m = &info->emu;
3178 char rs[20];
3179
3180 if (!strncmp(p[0], "CLASS", 5)) {
3181 p[0] += 5;
3182 switch (*p[0]) {
3183 case '?':
3184 p[0]++;
3185 sprintf(rs, "\r\n%d",
3186 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3187 #ifdef CONFIG_ISDN_TTY_FAX
3188 if (TTY_IS_FCLASS2(info))
3189 sprintf(rs, "\r\n2");
3190 else if (TTY_IS_FCLASS1(info))
3191 sprintf(rs, "\r\n1");
3192 #endif
3193 isdn_tty_at_cout(rs, info);
3194 break;
3195 case '=':
3196 p[0]++;
3197 switch (*p[0]) {
3198 case '0':
3199 p[0]++;
3200 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3201 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3202 m->mdmreg[REG_SI1] = 4;
3203 info->xmit_size =
3204 m->mdmreg[REG_PSIZE] * 16;
3205 break;
3206 #ifdef CONFIG_ISDN_TTY_FAX
3207 case '1':
3208 p[0]++;
3209 if (!(dev->global_features &
3210 ISDN_FEATURE_L3_FCLASS1))
3211 PARSE_ERROR1;
3212 m->mdmreg[REG_SI1] = 1;
3213 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3214 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3215 info->xmit_size =
3216 m->mdmreg[REG_PSIZE] * 16;
3217 break;
3218 case '2':
3219 p[0]++;
3220 if (!(dev->global_features &
3221 ISDN_FEATURE_L3_FCLASS2))
3222 PARSE_ERROR1;
3223 m->mdmreg[REG_SI1] = 1;
3224 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3225 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3226 info->xmit_size =
3227 m->mdmreg[REG_PSIZE] * 16;
3228 break;
3229 #endif
3230 case '8':
3231 p[0]++;
3232 /* L2 will change on dialout with si=1 */
3233 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3234 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3235 m->mdmreg[REG_SI1] = 5;
3236 info->xmit_size = VBUF;
3237 break;
3238 case '?':
3239 p[0]++;
3240 strcpy(rs, "\r\n0,");
3241 #ifdef CONFIG_ISDN_TTY_FAX
3242 if (dev->global_features &
3243 ISDN_FEATURE_L3_FCLASS1)
3244 strcat(rs, "1,");
3245 if (dev->global_features &
3246 ISDN_FEATURE_L3_FCLASS2)
3247 strcat(rs, "2,");
3248 #endif
3249 strcat(rs, "8");
3250 isdn_tty_at_cout(rs, info);
3251 break;
3252 default:
3253 PARSE_ERROR1;
3254 }
3255 break;
3256 default:
3257 PARSE_ERROR1;
3258 }
3259 return 0;
3260 }
3261 #ifdef CONFIG_ISDN_TTY_FAX
3262 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3263 #else
3264 PARSE_ERROR1;
3265 #endif
3266 }
3267
3268 /*
3269 * Parse AT+V.. commands
3270 */
3271 static int
3272 isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3273 {
3274 atemu *m = &info->emu;
3275 isdn_ctrl cmd;
3276 static char *vcmd[] =
3277 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3278 int i;
3279 int par1;
3280 int par2;
3281 char rs[20];
3282
3283 i = 0;
3284 while (vcmd[i]) {
3285 if (!strncmp(vcmd[i], p[0], 2)) {
3286 p[0] += 2;
3287 break;
3288 }
3289 i++;
3290 }
3291 switch (i) {
3292 case 0:
3293 /* AT+VNH - Auto hangup feature */
3294 switch (*p[0]) {
3295 case '?':
3296 p[0]++;
3297 isdn_tty_at_cout("\r\n1", info);
3298 break;
3299 case '=':
3300 p[0]++;
3301 switch (*p[0]) {
3302 case '1':
3303 p[0]++;
3304 break;
3305 case '?':
3306 p[0]++;
3307 isdn_tty_at_cout("\r\n1", info);
3308 break;
3309 default:
3310 PARSE_ERROR1;
3311 }
3312 break;
3313 default:
3314 PARSE_ERROR1;
3315 }
3316 break;
3317 case 1:
3318 /* AT+VIP - Reset all voice parameters */
3319 isdn_tty_modem_reset_vpar(m);
3320 break;
3321 case 2:
3322 /* AT+VLS - Select device, accept incoming call */
3323 switch (*p[0]) {
3324 case '?':
3325 p[0]++;
3326 sprintf(rs, "\r\n%d", m->vpar[0]);
3327 isdn_tty_at_cout(rs, info);
3328 break;
3329 case '=':
3330 p[0]++;
3331 switch (*p[0]) {
3332 case '0':
3333 p[0]++;
3334 m->vpar[0] = 0;
3335 break;
3336 case '2':
3337 p[0]++;
3338 m->vpar[0] = 2;
3339 break;
3340 case '?':
3341 p[0]++;
3342 isdn_tty_at_cout("\r\n0,2", info);
3343 break;
3344 default:
3345 PARSE_ERROR1;
3346 }
3347 break;
3348 default:
3349 PARSE_ERROR1;
3350 }
3351 break;
3352 case 3:
3353 /* AT+VRX - Start recording */
3354 if (!m->vpar[0])
3355 PARSE_ERROR1;
3356 if (info->online != 1) {
3357 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3358 return 1;
3359 }
3360 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3361 if (!info->dtmf_state) {
3362 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3363 PARSE_ERROR1;
3364 }
3365 info->silence_state = isdn_audio_silence_init(info->silence_state);
3366 if (!info->silence_state) {
3367 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3368 PARSE_ERROR1;
3369 }
3370 if (m->vpar[3] < 5) {
3371 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3372 if (!info->adpcmr) {
3373 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3374 PARSE_ERROR1;
3375 }
3376 }
3377 #ifdef ISDN_DEBUG_AT
3378 printk(KERN_DEBUG "AT: +VRX\n");
3379 #endif
3380 info->vonline |= 1;
3381 isdn_tty_modem_result(RESULT_CONNECT, info);
3382 return 0;
3383 break;
3384 case 4:
3385 /* AT+VSD - Silence detection */
3386 switch (*p[0]) {
3387 case '?':
3388 p[0]++;
3389 sprintf(rs, "\r\n<%d>,<%d>",
3390 m->vpar[1],
3391 m->vpar[2]);
3392 isdn_tty_at_cout(rs, info);
3393 break;
3394 case '=':
3395 p[0]++;
3396 if ((*p[0]>='0') && (*p[0]<='9')) {
3397 par1 = isdn_getnum(p);
3398 if ((par1 < 0) || (par1 > 31))
3399 PARSE_ERROR1;
3400 if (*p[0] != ',')
3401 PARSE_ERROR1;
3402 p[0]++;
3403 par2 = isdn_getnum(p);
3404 if ((par2 < 0) || (par2 > 255))
3405 PARSE_ERROR1;
3406 m->vpar[1] = par1;
3407 m->vpar[2] = par2;
3408 break;
3409 } else
3410 if (*p[0] == '?') {
3411 p[0]++;
3412 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3413 info);
3414 break;
3415 } else
3416 PARSE_ERROR1;
3417 break;
3418 default:
3419 PARSE_ERROR1;
3420 }
3421 break;
3422 case 5:
3423 /* AT+VSM - Select compression */
3424 switch (*p[0]) {
3425 case '?':
3426 p[0]++;
3427 sprintf(rs, "\r\n<%d>,<%d><8000>",
3428 m->vpar[3],
3429 m->vpar[1]);
3430 isdn_tty_at_cout(rs, info);
3431 break;
3432 case '=':
3433 p[0]++;
3434 switch (*p[0]) {
3435 case '2':
3436 case '3':
3437 case '4':
3438 case '5':
3439 case '6':
3440 par1 = isdn_getnum(p);
3441 if ((par1 < 2) || (par1 > 6))
3442 PARSE_ERROR1;
3443 m->vpar[3] = par1;
3444 break;
3445 case '?':
3446 p[0]++;
3447 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3448 info);
3449 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3450 info);
3451 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3452 info);
3453 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3454 info);
3455 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3456 info);
3457 break;
3458 default:
3459 PARSE_ERROR1;
3460 }
3461 break;
3462 default:
3463 PARSE_ERROR1;
3464 }
3465 break;
3466 case 6:
3467 /* AT+VTX - Start sending */
3468 if (!m->vpar[0])
3469 PARSE_ERROR1;
3470 if (info->online != 1) {
3471 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3472 return 1;
3473 }
3474 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3475 if (!info->dtmf_state) {
3476 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3477 PARSE_ERROR1;
3478 }
3479 if (m->vpar[3] < 5) {
3480 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3481 if (!info->adpcms) {
3482 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3483 PARSE_ERROR1;
3484 }
3485 }
3486 #ifdef ISDN_DEBUG_AT
3487 printk(KERN_DEBUG "AT: +VTX\n");
3488 #endif
3489 m->lastDLE = 0;
3490 info->vonline |= 2;
3491 isdn_tty_modem_result(RESULT_CONNECT, info);
3492 return 0;
3493 break;
3494 case 7:
3495 /* AT+VDD - DTMF detection */
3496 switch (*p[0]) {
3497 case '?':
3498 p[0]++;
3499 sprintf(rs, "\r\n<%d>,<%d>",
3500 m->vpar[4],
3501 m->vpar[5]);
3502 isdn_tty_at_cout(rs, info);
3503 break;
3504 case '=':
3505 p[0]++;
3506 if ((*p[0]>='0') && (*p[0]<='9')) {
3507 if (info->online != 1)
3508 PARSE_ERROR1;
3509 par1 = isdn_getnum(p);
3510 if ((par1 < 0) || (par1 > 15))
3511 PARSE_ERROR1;
3512 if (*p[0] != ',')
3513 PARSE_ERROR1;
3514 p[0]++;
3515 par2 = isdn_getnum(p);
3516 if ((par2 < 0) || (par2 > 255))
3517 PARSE_ERROR1;
3518 m->vpar[4] = par1;
3519 m->vpar[5] = par2;
3520 cmd.driver = info->isdn_driver;
3521 cmd.command = ISDN_CMD_AUDIO;
3522 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3523 cmd.parm.num[0] = par1;
3524 cmd.parm.num[1] = par2;
3525 isdn_command(&cmd);
3526 break;
3527 } else
3528 if (*p[0] == '?') {
3529 p[0]++;
3530 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3531 info);
3532 break;
3533 } else
3534 PARSE_ERROR1;
3535 break;
3536 default:
3537 PARSE_ERROR1;
3538 }
3539 break;
3540 default:
3541 PARSE_ERROR1;
3542 }
3543 return 0;
3544 }
3545 #endif /* CONFIG_ISDN_AUDIO */
3546
3547 /*
3548 * Parse and perform an AT-command-line.
3549 */
3550 static void
3551 isdn_tty_parse_at(modem_info * info)
3552 {
3553 atemu *m = &info->emu;
3554 char *p;
3555 char ds[40];
3556
3557 #ifdef ISDN_DEBUG_AT
3558 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3559 #endif
3560 for (p = &m->mdmcmd[2]; *p;) {
3561 switch (*p) {
3562 case ' ':
3563 p++;
3564 break;
3565 case 'A':
3566 /* A - Accept incoming call */
3567 p++;
3568 isdn_tty_cmd_ATA(info);
3569 return;
3570 break;
3571 case 'D':
3572 /* D - Dial */
3573 if (info->msr & UART_MSR_DCD)
3574 PARSE_ERROR;
3575 if (info->msr & UART_MSR_RI) {
3576 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3577 return;
3578 }
3579 isdn_tty_getdial(++p, ds, sizeof ds);
3580 p += strlen(p);
3581 if (!strlen(m->msn))
3582 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3583 else if (strlen(ds))
3584 isdn_tty_dial(ds, info, m);
3585 else
3586 PARSE_ERROR;
3587 return;
3588 case 'E':
3589 /* E - Turn Echo on/off */
3590 p++;
3591 switch (isdn_getnum(&p)) {
3592 case 0:
3593 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3594 break;
3595 case 1:
3596 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3597 break;
3598 default:
3599 PARSE_ERROR;
3600 }
3601 break;
3602 case 'H':
3603 /* H - On/Off-hook */
3604 p++;
3605 switch (*p) {
3606 case '0':
3607 p++;
3608 isdn_tty_on_hook(info);
3609 break;
3610 case '1':
3611 p++;
3612 isdn_tty_off_hook();
3613 break;
3614 default:
3615 isdn_tty_on_hook(info);
3616 break;
3617 }
3618 break;
3619 case 'I':
3620 /* I - Information */
3621 p++;
3622 isdn_tty_at_cout("\r\nLinux ISDN", info);
3623 switch (*p) {
3624 case '0':
3625 case '1':
3626 p++;
3627 break;
3628 case '2':
3629 p++;
3630 isdn_tty_report(info);
3631 break;
3632 case '3':
3633 p++;
3634 sprintf(ds, "\r\n%d", info->emu.charge);
3635 isdn_tty_at_cout(ds, info);
3636 break;
3637 default:;
3638 }
3639 break;
3640 #ifdef DUMMY_HAYES_AT
3641 case 'L':
3642 case 'M':
3643 /* only for be compilant with common scripts */
3644 /* no function */
3645 p++;
3646 isdn_getnum(&p);
3647 break;
3648 #endif
3649 case 'O':
3650 /* O - Go online */
3651 p++;
3652 if (info->msr & UART_MSR_DCD)
3653 /* if B-Channel is up */
3654 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3655 else
3656 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3657 return;
3658 case 'Q':
3659 /* Q - Turn Emulator messages on/off */
3660 p++;
3661 switch (isdn_getnum(&p)) {
3662 case 0:
3663 m->mdmreg[REG_RESP] |= BIT_RESP;
3664 break;
3665 case 1:
3666 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3667 break;
3668 default:
3669 PARSE_ERROR;
3670 }
3671 break;
3672 case 'S':
3673 /* S - Set/Get Register */
3674 p++;
3675 if (isdn_tty_cmd_ATS(&p, info))
3676 return;
3677 break;
3678 case 'V':
3679 /* V - Numeric or ASCII Emulator-messages */
3680 p++;
3681 switch (isdn_getnum(&p)) {
3682 case 0:
3683 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3684 break;
3685 case 1:
3686 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3687 break;
3688 default:
3689 PARSE_ERROR;
3690 }
3691 break;
3692 case 'Z':
3693 /* Z - Load Registers from Profile */
3694 p++;
3695 if (info->msr & UART_MSR_DCD) {
3696 info->online = 0;
3697 isdn_tty_on_hook(info);
3698 }
3699 isdn_tty_modem_reset_regs(info, 1);
3700 break;
3701 case '+':
3702 p++;
3703 switch (*p) {
3704 #ifdef CONFIG_ISDN_AUDIO
3705 case 'F':
3706 p++;
3707 if (isdn_tty_cmd_PLUSF(&p, info))
3708 return;
3709 break;
3710 case 'V':
3711 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3712 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3713 PARSE_ERROR;
3714 p++;
3715 if (isdn_tty_cmd_PLUSV(&p, info))
3716 return;
3717 break;
3718 #endif /* CONFIG_ISDN_AUDIO */
3719 case 'S': /* SUSPEND */
3720 p++;
3721 isdn_tty_get_msnstr(ds, &p);
3722 isdn_tty_suspend(ds, info, m);
3723 break;
3724 case 'R': /* RESUME */
3725 p++;
3726 isdn_tty_get_msnstr(ds, &p);
3727 isdn_tty_resume(ds, info, m);
3728 break;
3729 case 'M': /* MESSAGE */
3730 p++;
3731 isdn_tty_send_msg(info, m, p);
3732 break;
3733 default:
3734 PARSE_ERROR;
3735 }
3736 break;
3737 case '&':
3738 p++;
3739 if (isdn_tty_cmd_ATand(&p, info))
3740 return;
3741 break;
3742 default:
3743 PARSE_ERROR;
3744 }
3745 }
3746 #ifdef CONFIG_ISDN_AUDIO
3747 if (!info->vonline)
3748 #endif
3749 isdn_tty_modem_result(RESULT_OK, info);
3750 }
3751
3752 /* Need own toupper() because standard-toupper is not available
3753 * within modules.
3754 */
3755 #define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3756
3757 /*
3758 * Perform line-editing of AT-commands
3759 *
3760 * Parameters:
3761 * p inputbuffer
3762 * count length of buffer
3763 * channel index to line (minor-device)
3764 * user flag: buffer is in userspace
3765 */
3766 static int
3767 isdn_tty_edit_at(const char *p, int count, modem_info * info, int user)
3768 {
3769 atemu *m = &info->emu;
3770 int total = 0;
3771 u_char c;
3772 char eb[2];
3773 int cnt;
3774
3775 for (cnt = count; cnt > 0; p++, cnt--) {
3776 if (user)
3777 get_user(c, p);
3778 else
3779 c = *p;
3780 total++;
3781 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3782 /* Separator (CR or LF) */
3783 m->mdmcmd[m->mdmcmdl] = 0;
3784 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3785 eb[0] = c;
3786 eb[1] = 0;
3787 isdn_tty_at_cout(eb, info);
3788 }
3789 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3790 isdn_tty_parse_at(info);
3791 m->mdmcmdl = 0;
3792 continue;
3793 }
3794 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3795 /* Backspace-Function */
3796 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3797 if (m->mdmcmdl)
3798 m->mdmcmdl--;
3799 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3800 isdn_tty_at_cout("\b", info);
3801 }
3802 continue;
3803 }
3804 if (cmdchar(c)) {
3805 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3806 eb[0] = c;
3807 eb[1] = 0;
3808 isdn_tty_at_cout(eb, info);
3809 }
3810 if (m->mdmcmdl < 255) {
3811 c = my_toupper(c);
3812 switch (m->mdmcmdl) {
3813 case 1:
3814 if (c == 'T') {
3815 m->mdmcmd[m->mdmcmdl] = c;
3816 m->mdmcmd[++m->mdmcmdl] = 0;
3817 break;
3818 } else
3819 m->mdmcmdl = 0;
3820 /* Fall through, check for 'A' */
3821 case 0:
3822 if (c == 'A') {
3823 m->mdmcmd[m->mdmcmdl] = c;
3824 m->mdmcmd[++m->mdmcmdl] = 0;
3825 }
3826 break;
3827 default:
3828 m->mdmcmd[m->mdmcmdl] = c;
3829 m->mdmcmd[++m->mdmcmdl] = 0;
3830 }
3831 }
3832 }
3833 }
3834 return total;
3835 }
3836
3837 /*
3838 * Switch all modem-channels who are online and got a valid
3839 * escape-sequence 1.5 seconds ago, to command-mode.
3840 * This function is called every second via timer-interrupt from within
3841 * timer-dispatcher isdn_timer_function()
3842 */
3843 void
3844 isdn_tty_modem_escape(void)
3845 {
3846 int ton = 0;
3847 int i;
3848 int midx;
3849
3850 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3851 if (USG_MODEM(dev->usage[i]))
3852 if ((midx = dev->m_idx[i]) >= 0) {
3853 modem_info *info = &dev->mdm.info[midx];
3854 if (info->online) {
3855 ton = 1;
3856 if ((info->emu.pluscount == 3) &&
3857 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3858 info->emu.pluscount = 0;
3859 info->online = 0;
3860 isdn_tty_modem_result(RESULT_OK, info);
3861 }
3862 }
3863 }
3864 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3865 }
3866
3867 /*
3868 * Put a RING-message to all modem-channels who have the RI-bit set.
3869 * This function is called every second via timer-interrupt from within
3870 * timer-dispatcher isdn_timer_function()
3871 */
3872 void
3873 isdn_tty_modem_ring(void)
3874 {
3875 int ton = 0;
3876 int i;
3877
3878 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3879 modem_info *info = &dev->mdm.info[i];
3880 if (info->msr & UART_MSR_RI) {
3881 ton = 1;
3882 isdn_tty_modem_result(RESULT_RING, info);
3883 }
3884 }
3885 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3886 }
3887
3888 /*
3889 * For all online tty's, try sending data to
3890 * the lower levels.
3891 */
3892 void
3893 isdn_tty_modem_xmit(void)
3894 {
3895 int ton = 1;
3896 int i;
3897
3898 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3899 modem_info *info = &dev->mdm.info[i];
3900 if (info->online) {
3901 ton = 1;
3902 isdn_tty_senddown(info);
3903 isdn_tty_tint(info);
3904 }
3905 }
3906 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3907 }
3908
3909 /*
3910 * Check all channels if we have a 'no carrier' timeout.
3911 * Timeout value is set by Register S7.
3912 */
3913 void
3914 isdn_tty_carrier_timeout(void)
3915 {
3916 int ton = 0;
3917 int i;
3918
3919 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3920 modem_info *info = &dev->mdm.info[i];
3921 if (info->dialing) {
3922 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3923 info->dialing = 0;
3924 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3925 isdn_tty_modem_hup(info, 1);
3926 }
3927 else
3928 ton = 1;
3929 }
3930 }
3931 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3932 }
MOXA 2.6.9 from sdlinux-moxaart.tgz