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bitops: remove ext2 non-atomic bitops from asm/bitops.h
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / isdn / i4l / isdn_tty.c
blob3d88f15aa218bc318d9a4e5c790d5c0029edf703
1 /* $Id: isdn_tty.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
2 *
3 * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
4 *
5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
7 *
8 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 */
12 #undef ISDN_TTY_STAT_DEBUG
13
14 #include <linux/isdn.h>
15 #include <linux/slab.h>
16 #include <linux/delay.h>
17 #include <linux/mutex.h>
18 #include "isdn_common.h"
19 #include "isdn_tty.h"
20 #ifdef CONFIG_ISDN_AUDIO
21 #include "isdn_audio.h"
22 #define VBUF 0x3e0
23 #define VBUFX (VBUF/16)
24 #endif
25
26 #define FIX_FILE_TRANSFER
27 #define DUMMY_HAYES_AT
28
29 /* Prototypes */
30
31 static DEFINE_MUTEX(modem_info_mutex);
32 static int isdn_tty_edit_at(const char *, int, modem_info *);
33 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
34 static void isdn_tty_modem_reset_regs(modem_info *, int);
35 static void isdn_tty_cmd_ATA(modem_info *);
36 static void isdn_tty_flush_buffer(struct tty_struct *);
37 static void isdn_tty_modem_result(int, modem_info *);
38 #ifdef CONFIG_ISDN_AUDIO
39 static int isdn_tty_countDLE(unsigned char *, int);
40 #endif
41
42 /* Leave this unchanged unless you know what you do! */
43 #define MODEM_PARANOIA_CHECK
44 #define MODEM_DO_RESTART
45
46 static int bit2si[8] =
47 {1, 5, 7, 7, 7, 7, 7, 7};
48 static int si2bit[8] =
49 {4, 1, 4, 4, 4, 4, 4, 4};
50
51 char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
52
53
54 /* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
55 * to stuff incoming data directly into a tty's flip-buffer. This
56 * is done to speed up tty-receiving if the receive-queue is empty.
57 * This routine MUST be called with interrupts off.
58 * Return:
59 * 1 = Success
60 * 0 = Failure, data has to be buffered and later processed by
61 * isdn_tty_readmodem().
62 */
63 static int
64 isdn_tty_try_read(modem_info * info, struct sk_buff *skb)
65 {
66 int c;
67 int len;
68 struct tty_struct *tty;
69 char last;
70
71 if (info->online) {
72 if ((tty = info->tty)) {
73 if (info->mcr & UART_MCR_RTS) {
74 len = skb->len
75 #ifdef CONFIG_ISDN_AUDIO
76 + ISDN_AUDIO_SKB_DLECOUNT(skb)
77 #endif
78 ;
79
80 c = tty_buffer_request_room(tty, len);
81 if (c >= len) {
82 #ifdef CONFIG_ISDN_AUDIO
83 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
84 int l = skb->len;
85 unsigned char *dp = skb->data;
86 while (--l) {
87 if (*dp == DLE)
88 tty_insert_flip_char(tty, DLE, 0);
89 tty_insert_flip_char(tty, *dp++, 0);
90 }
91 if (*dp == DLE)
92 tty_insert_flip_char(tty, DLE, 0);
93 last = *dp;
94 } else {
95 #endif
96 if(len > 1)
97 tty_insert_flip_string(tty, skb->data, len - 1);
98 last = skb->data[len - 1];
99 #ifdef CONFIG_ISDN_AUDIO
100 }
101 #endif
102 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
103 tty_insert_flip_char(tty, last, 0xFF);
104 else
105 tty_insert_flip_char(tty, last, TTY_NORMAL);
106 tty_flip_buffer_push(tty);
107 kfree_skb(skb);
108 return 1;
109 }
110 }
111 }
112 }
113 return 0;
114 }
115
116 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
117 * It tries getting received data from the receive queue an stuff it into
118 * the tty's flip-buffer.
119 */
120 void
121 isdn_tty_readmodem(void)
122 {
123 int resched = 0;
124 int midx;
125 int i;
126 int r;
127 struct tty_struct *tty;
128 modem_info *info;
129
130 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
131 if ((midx = dev->m_idx[i]) >= 0) {
132 info = &dev->mdm.info[midx];
133 if (info->online) {
134 r = 0;
135 #ifdef CONFIG_ISDN_AUDIO
136 isdn_audio_eval_dtmf(info);
137 if ((info->vonline & 1) && (info->emu.vpar[1]))
138 isdn_audio_eval_silence(info);
139 #endif
140 if ((tty = info->tty)) {
141 if (info->mcr & UART_MCR_RTS) {
142 /* CISCO AsyncPPP Hack */
143 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
144 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
145 else
146 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
147 if (r)
148 tty_flip_buffer_push(tty);
149 } else
150 r = 1;
151 } else
152 r = 1;
153 if (r) {
154 info->rcvsched = 0;
155 resched = 1;
156 } else
157 info->rcvsched = 1;
158 }
159 }
160 }
161 if (!resched)
162 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
163 }
164
165 int
166 isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
167 {
168 ulong flags;
169 int midx;
170 #ifdef CONFIG_ISDN_AUDIO
171 int ifmt;
172 #endif
173 modem_info *info;
174
175 if ((midx = dev->m_idx[i]) < 0) {
176 /* if midx is invalid, packet is not for tty */
177 return 0;
178 }
179 info = &dev->mdm.info[midx];
180 #ifdef CONFIG_ISDN_AUDIO
181 ifmt = 1;
182
183 if ((info->vonline) && (!info->emu.vpar[4]))
184 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
185 if ((info->vonline & 1) && (info->emu.vpar[1]))
186 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
187 #endif
188 if ((info->online < 2)
189 #ifdef CONFIG_ISDN_AUDIO
190 && (!(info->vonline & 1))
191 #endif
192 ) {
193 /* If Modem not listening, drop data */
194 kfree_skb(skb);
195 return 1;
196 }
197 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
198 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
199 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
200 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
201 skb_pull(skb, 4);
202 else
203 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
204 skb_pull(skb, 2);
205 } else
206 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
207 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
208 skb_pull(skb, 4);
209 }
210 #ifdef CONFIG_ISDN_AUDIO
211 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
212 ISDN_AUDIO_SKB_LOCK(skb) = 0;
213 if (info->vonline & 1) {
214 /* voice conversion/compression */
215 switch (info->emu.vpar[3]) {
216 case 2:
217 case 3:
218 case 4:
219 /* adpcm
220 * Since compressed data takes less
221 * space, we can overwrite the buffer.
222 */
223 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
224 ifmt,
225 skb->data,
226 skb->data,
227 skb->len));
228 break;
229 case 5:
230 /* a-law */
231 if (!ifmt)
232 isdn_audio_ulaw2alaw(skb->data, skb->len);
233 break;
234 case 6:
235 /* u-law */
236 if (ifmt)
237 isdn_audio_alaw2ulaw(skb->data, skb->len);
238 break;
239 }
240 ISDN_AUDIO_SKB_DLECOUNT(skb) =
241 isdn_tty_countDLE(skb->data, skb->len);
242 }
243 #ifdef CONFIG_ISDN_TTY_FAX
244 else {
245 if (info->faxonline & 2) {
246 isdn_tty_fax_bitorder(info, skb);
247 ISDN_AUDIO_SKB_DLECOUNT(skb) =
248 isdn_tty_countDLE(skb->data, skb->len);
249 }
250 }
251 #endif
252 #endif
253 /* Try to deliver directly via tty-buf if queue is empty */
254 spin_lock_irqsave(&info->readlock, flags);
255 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
256 if (isdn_tty_try_read(info, skb)) {
257 spin_unlock_irqrestore(&info->readlock, flags);
258 return 1;
259 }
260 /* Direct deliver failed or queue wasn't empty.
261 * Queue up for later dequeueing via timer-irq.
262 */
263 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
264 dev->drv[di]->rcvcount[channel] +=
265 (skb->len
266 #ifdef CONFIG_ISDN_AUDIO
267 + ISDN_AUDIO_SKB_DLECOUNT(skb)
268 #endif
269 );
270 spin_unlock_irqrestore(&info->readlock, flags);
271 /* Schedule dequeuing */
272 if ((dev->modempoll) && (info->rcvsched))
273 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
274 return 1;
275 }
276
277 static void
278 isdn_tty_cleanup_xmit(modem_info * info)
279 {
280 skb_queue_purge(&info->xmit_queue);
281 #ifdef CONFIG_ISDN_AUDIO
282 skb_queue_purge(&info->dtmf_queue);
283 #endif
284 }
285
286 static void
287 isdn_tty_tint(modem_info * info)
288 {
289 struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
290 int len, slen;
291
292 if (!skb)
293 return;
294 len = skb->len;
295 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
296 info->isdn_channel, 1, skb)) == len) {
297 struct tty_struct *tty = info->tty;
298 info->send_outstanding++;
299 info->msr &= ~UART_MSR_CTS;
300 info->lsr &= ~UART_LSR_TEMT;
301 tty_wakeup(tty);
302 return;
303 }
304 if (slen < 0) {
305 /* Error: no channel, already shutdown, or wrong parameter */
306 dev_kfree_skb(skb);
307 return;
308 }
309 skb_queue_head(&info->xmit_queue, skb);
310 }
311
312 #ifdef CONFIG_ISDN_AUDIO
313 static int
314 isdn_tty_countDLE(unsigned char *buf, int len)
315 {
316 int count = 0;
317
318 while (len--)
319 if (*buf++ == DLE)
320 count++;
321 return count;
322 }
323
324 /* This routine is called from within isdn_tty_write() to perform
325 * DLE-decoding when sending audio-data.
326 */
327 static int
328 isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
329 {
330 unsigned char *p = &info->xmit_buf[info->xmit_count];
331 int count = 0;
332
333 while (len > 0) {
334 if (m->lastDLE) {
335 m->lastDLE = 0;
336 switch (*p) {
337 case DLE:
338 /* Escape code */
339 if (len > 1)
340 memmove(p, p + 1, len - 1);
341 p--;
342 count++;
343 break;
344 case ETX:
345 /* End of data */
346 info->vonline |= 4;
347 return count;
348 case DC4:
349 /* Abort RX */
350 info->vonline &= ~1;
351 #ifdef ISDN_DEBUG_MODEM_VOICE
352 printk(KERN_DEBUG
353 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
354 info->line);
355 #endif
356 isdn_tty_at_cout("\020\003", info);
357 if (!info->vonline) {
358 #ifdef ISDN_DEBUG_MODEM_VOICE
359 printk(KERN_DEBUG
360 "DLEdown: send VCON on ttyI%d\n",
361 info->line);
362 #endif
363 isdn_tty_at_cout("\r\nVCON\r\n", info);
364 }
365 /* Fall through */
366 case 'q':
367 case 's':
368 /* Silence */
369 if (len > 1)
370 memmove(p, p + 1, len - 1);
371 p--;
372 break;
373 }
374 } else {
375 if (*p == DLE)
376 m->lastDLE = 1;
377 else
378 count++;
379 }
380 p++;
381 len--;
382 }
383 if (len < 0) {
384 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
385 return 0;
386 }
387 return count;
388 }
389
390 /* This routine is called from within isdn_tty_write() when receiving
391 * audio-data. It interrupts receiving, if an character other than
392 * ^S or ^Q is sent.
393 */
394 static int
395 isdn_tty_end_vrx(const char *buf, int c)
396 {
397 char ch;
398
399 while (c--) {
400 ch = *buf;
401 if ((ch != 0x11) && (ch != 0x13))
402 return 1;
403 buf++;
404 }
405 return 0;
406 }
407
408 static int voice_cf[7] =
409 {0, 0, 4, 3, 2, 0, 0};
410
411 #endif /* CONFIG_ISDN_AUDIO */
412
413 /* isdn_tty_senddown() is called either directly from within isdn_tty_write()
414 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
415 * outgoing data from the tty's xmit-buffer, handles voice-decompression or
416 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
417 */
418 static void
419 isdn_tty_senddown(modem_info * info)
420 {
421 int buflen;
422 int skb_res;
423 #ifdef CONFIG_ISDN_AUDIO
424 int audio_len;
425 #endif
426 struct sk_buff *skb;
427
428 #ifdef CONFIG_ISDN_AUDIO
429 if (info->vonline & 4) {
430 info->vonline &= ~6;
431 if (!info->vonline) {
432 #ifdef ISDN_DEBUG_MODEM_VOICE
433 printk(KERN_DEBUG
434 "senddown: send VCON on ttyI%d\n",
435 info->line);
436 #endif
437 isdn_tty_at_cout("\r\nVCON\r\n", info);
438 }
439 }
440 #endif
441 if (!(buflen = info->xmit_count))
442 return;
443 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
444 info->msr &= ~UART_MSR_CTS;
445 info->lsr &= ~UART_LSR_TEMT;
446 /* info->xmit_count is modified here and in isdn_tty_write().
447 * So we return here if isdn_tty_write() is in the
448 * critical section.
449 */
450 atomic_inc(&info->xmit_lock);
451 if (!(atomic_dec_and_test(&info->xmit_lock)))
452 return;
453 if (info->isdn_driver < 0) {
454 info->xmit_count = 0;
455 return;
456 }
457 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
458 #ifdef CONFIG_ISDN_AUDIO
459 if (info->vonline & 2)
460 audio_len = buflen * voice_cf[info->emu.vpar[3]];
461 else
462 audio_len = 0;
463 skb = dev_alloc_skb(skb_res + buflen + audio_len);
464 #else
465 skb = dev_alloc_skb(skb_res + buflen);
466 #endif
467 if (!skb) {
468 printk(KERN_WARNING
469 "isdn_tty: Out of memory in ttyI%d senddown\n",
470 info->line);
471 return;
472 }
473 skb_reserve(skb, skb_res);
474 memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
475 info->xmit_count = 0;
476 #ifdef CONFIG_ISDN_AUDIO
477 if (info->vonline & 2) {
478 /* For now, ifmt is fixed to 1 (alaw), since this
479 * is used with ISDN everywhere in the world, except
480 * US, Canada and Japan.
481 * Later, when US-ISDN protocols are implemented,
482 * this setting will depend on the D-channel protocol.
483 */
484 int ifmt = 1;
485
486 /* voice conversion/decompression */
487 switch (info->emu.vpar[3]) {
488 case 2:
489 case 3:
490 case 4:
491 /* adpcm, compatible to ZyXel 1496 modem
492 * with ROM revision 6.01
493 */
494 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
495 ifmt,
496 skb->data,
497 skb_put(skb, audio_len),
498 buflen);
499 skb_pull(skb, buflen);
500 skb_trim(skb, audio_len);
501 break;
502 case 5:
503 /* a-law */
504 if (!ifmt)
505 isdn_audio_alaw2ulaw(skb->data,
506 buflen);
507 break;
508 case 6:
509 /* u-law */
510 if (ifmt)
511 isdn_audio_ulaw2alaw(skb->data,
512 buflen);
513 break;
514 }
515 }
516 #endif /* CONFIG_ISDN_AUDIO */
517 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
518 /* Add T.70 simplified header */
519 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
520 memcpy(skb_push(skb, 2), "\1\0", 2);
521 else
522 memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
523 }
524 skb_queue_tail(&info->xmit_queue, skb);
525 }
526
527 /************************************************************
528 *
529 * Modem-functions
530 *
531 * mostly "stolen" from original Linux-serial.c and friends.
532 *
533 ************************************************************/
534
535 /* The next routine is called once from within timer-interrupt
536 * triggered within isdn_tty_modem_ncarrier(). It calls
537 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
538 * into the tty's buffer.
539 */
540 static void
541 isdn_tty_modem_do_ncarrier(unsigned long data)
542 {
543 modem_info *info = (modem_info *) data;
544 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
545 }
546
547 /* Next routine is called, whenever the DTR-signal is raised.
548 * It checks the ncarrier-flag, and triggers the above routine
549 * when necessary. The ncarrier-flag is set, whenever DTR goes
550 * low.
551 */
552 static void
553 isdn_tty_modem_ncarrier(modem_info * info)
554 {
555 if (info->ncarrier) {
556 info->nc_timer.expires = jiffies + HZ;
557 add_timer(&info->nc_timer);
558 }
559 }
560
561 /*
562 * return the usage calculated by si and layer 2 protocol
563 */
564 static int
565 isdn_calc_usage(int si, int l2)
566 {
567 int usg = ISDN_USAGE_MODEM;
568
569 #ifdef CONFIG_ISDN_AUDIO
570 if (si == 1) {
571 switch(l2) {
572 case ISDN_PROTO_L2_MODEM:
573 usg = ISDN_USAGE_MODEM;
574 break;
575 #ifdef CONFIG_ISDN_TTY_FAX
576 case ISDN_PROTO_L2_FAX:
577 usg = ISDN_USAGE_FAX;
578 break;
579 #endif
580 case ISDN_PROTO_L2_TRANS:
581 default:
582 usg = ISDN_USAGE_VOICE;
583 break;
584 }
585 }
586 #endif
587 return(usg);
588 }
589
590 /* isdn_tty_dial() performs dialing of a tty an the necessary
591 * setup of the lower levels before that.
592 */
593 static void
594 isdn_tty_dial(char *n, modem_info * info, atemu * m)
595 {
596 int usg = ISDN_USAGE_MODEM;
597 int si = 7;
598 int l2 = m->mdmreg[REG_L2PROT];
599 u_long flags;
600 isdn_ctrl cmd;
601 int i;
602 int j;
603
604 for (j = 7; j >= 0; j--)
605 if (m->mdmreg[REG_SI1] & (1 << j)) {
606 si = bit2si[j];
607 break;
608 }
609 usg = isdn_calc_usage(si, l2);
610 #ifdef CONFIG_ISDN_AUDIO
611 if ((si == 1) &&
612 (l2 != ISDN_PROTO_L2_MODEM)
613 #ifdef CONFIG_ISDN_TTY_FAX
614 && (l2 != ISDN_PROTO_L2_FAX)
615 #endif
616 ) {
617 l2 = ISDN_PROTO_L2_TRANS;
618 usg = ISDN_USAGE_VOICE;
619 }
620 #endif
621 m->mdmreg[REG_SI1I] = si2bit[si];
622 spin_lock_irqsave(&dev->lock, flags);
623 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
624 if (i < 0) {
625 spin_unlock_irqrestore(&dev->lock, flags);
626 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
627 } else {
628 info->isdn_driver = dev->drvmap[i];
629 info->isdn_channel = dev->chanmap[i];
630 info->drv_index = i;
631 dev->m_idx[i] = info->line;
632 dev->usage[i] |= ISDN_USAGE_OUTGOING;
633 info->last_dir = 1;
634 strcpy(info->last_num, n);
635 isdn_info_update();
636 spin_unlock_irqrestore(&dev->lock, flags);
637 cmd.driver = info->isdn_driver;
638 cmd.arg = info->isdn_channel;
639 cmd.command = ISDN_CMD_CLREAZ;
640 isdn_command(&cmd);
641 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
642 cmd.driver = info->isdn_driver;
643 cmd.command = ISDN_CMD_SETEAZ;
644 isdn_command(&cmd);
645 cmd.driver = info->isdn_driver;
646 cmd.command = ISDN_CMD_SETL2;
647 info->last_l2 = l2;
648 cmd.arg = info->isdn_channel + (l2 << 8);
649 isdn_command(&cmd);
650 cmd.driver = info->isdn_driver;
651 cmd.command = ISDN_CMD_SETL3;
652 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
653 #ifdef CONFIG_ISDN_TTY_FAX
654 if (l2 == ISDN_PROTO_L2_FAX) {
655 cmd.parm.fax = info->fax;
656 info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
657 }
658 #endif
659 isdn_command(&cmd);
660 cmd.driver = info->isdn_driver;
661 cmd.arg = info->isdn_channel;
662 sprintf(cmd.parm.setup.phone, "%s", n);
663 sprintf(cmd.parm.setup.eazmsn, "%s",
664 isdn_map_eaz2msn(m->msn, info->isdn_driver));
665 cmd.parm.setup.si1 = si;
666 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
667 cmd.command = ISDN_CMD_DIAL;
668 info->dialing = 1;
669 info->emu.carrierwait = 0;
670 strcpy(dev->num[i], n);
671 isdn_info_update();
672 isdn_command(&cmd);
673 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
674 }
675 }
676
677 /* isdn_tty_hangup() disassociates a tty from the real
678 * ISDN-line (hangup). The usage-status is cleared
679 * and some cleanup is done also.
680 */
681 void
682 isdn_tty_modem_hup(modem_info * info, int local)
683 {
684 isdn_ctrl cmd;
685 int di, ch;
686
687 if (!info)
688 return;
689
690 di = info->isdn_driver;
691 ch = info->isdn_channel;
692 if (di < 0 || ch < 0)
693 return;
694
695 info->isdn_driver = -1;
696 info->isdn_channel = -1;
697
698 #ifdef ISDN_DEBUG_MODEM_HUP
699 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
700 #endif
701 info->rcvsched = 0;
702 isdn_tty_flush_buffer(info->tty);
703 if (info->online) {
704 info->last_lhup = local;
705 info->online = 0;
706 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
707 }
708 #ifdef CONFIG_ISDN_AUDIO
709 info->vonline = 0;
710 #ifdef CONFIG_ISDN_TTY_FAX
711 info->faxonline = 0;
712 info->fax->phase = ISDN_FAX_PHASE_IDLE;
713 #endif
714 info->emu.vpar[4] = 0;
715 info->emu.vpar[5] = 8;
716 kfree(info->dtmf_state);
717 info->dtmf_state = NULL;
718 kfree(info->silence_state);
719 info->silence_state = NULL;
720 kfree(info->adpcms);
721 info->adpcms = NULL;
722 kfree(info->adpcmr);
723 info->adpcmr = NULL;
724 #endif
725 if ((info->msr & UART_MSR_RI) &&
726 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
727 isdn_tty_modem_result(RESULT_RUNG, info);
728 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
729 info->lsr |= UART_LSR_TEMT;
730
731 if (local) {
732 cmd.driver = di;
733 cmd.command = ISDN_CMD_HANGUP;
734 cmd.arg = ch;
735 isdn_command(&cmd);
736 }
737
738 isdn_all_eaz(di, ch);
739 info->emu.mdmreg[REG_RINGCNT] = 0;
740 isdn_free_channel(di, ch, 0);
741
742 if (info->drv_index >= 0) {
743 dev->m_idx[info->drv_index] = -1;
744 info->drv_index = -1;
745 }
746 }
747
748 /*
749 * Begin of a CAPI like interface, currently used only for
750 * supplementary service (CAPI 2.0 part III)
751 */
752 #include <linux/isdn/capicmd.h>
753
754 int
755 isdn_tty_capi_facility(capi_msg *cm) {
756 return(-1); /* dummy */
757 }
758
759 /* isdn_tty_suspend() tries to suspend the current tty connection
760 */
761 static void
762 isdn_tty_suspend(char *id, modem_info * info, atemu * m)
763 {
764 isdn_ctrl cmd;
765
766 int l;
767
768 if (!info)
769 return;
770
771 #ifdef ISDN_DEBUG_MODEM_SERVICES
772 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
773 #endif
774 l = strlen(id);
775 if ((info->isdn_driver >= 0)) {
776 cmd.parm.cmsg.Length = l+18;
777 cmd.parm.cmsg.Command = CAPI_FACILITY;
778 cmd.parm.cmsg.Subcommand = CAPI_REQ;
779 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
780 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
781 cmd.parm.cmsg.para[1] = 0;
782 cmd.parm.cmsg.para[2] = l + 3;
783 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
784 cmd.parm.cmsg.para[4] = 0;
785 cmd.parm.cmsg.para[5] = l;
786 strncpy(&cmd.parm.cmsg.para[6], id, l);
787 cmd.command = CAPI_PUT_MESSAGE;
788 cmd.driver = info->isdn_driver;
789 cmd.arg = info->isdn_channel;
790 isdn_command(&cmd);
791 }
792 }
793
794 /* isdn_tty_resume() tries to resume a suspended call
795 * setup of the lower levels before that. unfortunatly here is no
796 * checking for compatibility of used protocols implemented by Q931
797 * It does the same things like isdn_tty_dial, the last command
798 * is different, may be we can merge it.
799 */
800
801 static void
802 isdn_tty_resume(char *id, modem_info * info, atemu * m)
803 {
804 int usg = ISDN_USAGE_MODEM;
805 int si = 7;
806 int l2 = m->mdmreg[REG_L2PROT];
807 isdn_ctrl cmd;
808 ulong flags;
809 int i;
810 int j;
811 int l;
812
813 l = strlen(id);
814 for (j = 7; j >= 0; j--)
815 if (m->mdmreg[REG_SI1] & (1 << j)) {
816 si = bit2si[j];
817 break;
818 }
819 usg = isdn_calc_usage(si, l2);
820 #ifdef CONFIG_ISDN_AUDIO
821 if ((si == 1) &&
822 (l2 != ISDN_PROTO_L2_MODEM)
823 #ifdef CONFIG_ISDN_TTY_FAX
824 && (l2 != ISDN_PROTO_L2_FAX)
825 #endif
826 ) {
827 l2 = ISDN_PROTO_L2_TRANS;
828 usg = ISDN_USAGE_VOICE;
829 }
830 #endif
831 m->mdmreg[REG_SI1I] = si2bit[si];
832 spin_lock_irqsave(&dev->lock, flags);
833 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
834 if (i < 0) {
835 spin_unlock_irqrestore(&dev->lock, flags);
836 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
837 } else {
838 info->isdn_driver = dev->drvmap[i];
839 info->isdn_channel = dev->chanmap[i];
840 info->drv_index = i;
841 dev->m_idx[i] = info->line;
842 dev->usage[i] |= ISDN_USAGE_OUTGOING;
843 info->last_dir = 1;
844 // strcpy(info->last_num, n);
845 isdn_info_update();
846 spin_unlock_irqrestore(&dev->lock, flags);
847 cmd.driver = info->isdn_driver;
848 cmd.arg = info->isdn_channel;
849 cmd.command = ISDN_CMD_CLREAZ;
850 isdn_command(&cmd);
851 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
852 cmd.driver = info->isdn_driver;
853 cmd.command = ISDN_CMD_SETEAZ;
854 isdn_command(&cmd);
855 cmd.driver = info->isdn_driver;
856 cmd.command = ISDN_CMD_SETL2;
857 info->last_l2 = l2;
858 cmd.arg = info->isdn_channel + (l2 << 8);
859 isdn_command(&cmd);
860 cmd.driver = info->isdn_driver;
861 cmd.command = ISDN_CMD_SETL3;
862 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
863 isdn_command(&cmd);
864 cmd.driver = info->isdn_driver;
865 cmd.arg = info->isdn_channel;
866 cmd.parm.cmsg.Length = l+18;
867 cmd.parm.cmsg.Command = CAPI_FACILITY;
868 cmd.parm.cmsg.Subcommand = CAPI_REQ;
869 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
870 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
871 cmd.parm.cmsg.para[1] = 0;
872 cmd.parm.cmsg.para[2] = l+3;
873 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
874 cmd.parm.cmsg.para[4] = 0;
875 cmd.parm.cmsg.para[5] = l;
876 strncpy(&cmd.parm.cmsg.para[6], id, l);
877 cmd.command =CAPI_PUT_MESSAGE;
878 info->dialing = 1;
879 // strcpy(dev->num[i], n);
880 isdn_info_update();
881 isdn_command(&cmd);
882 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
883 }
884 }
885
886 /* isdn_tty_send_msg() sends a message to a HL driver
887 * This is used for hybrid modem cards to send AT commands to it
888 */
889
890 static void
891 isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
892 {
893 int usg = ISDN_USAGE_MODEM;
894 int si = 7;
895 int l2 = m->mdmreg[REG_L2PROT];
896 isdn_ctrl cmd;
897 ulong flags;
898 int i;
899 int j;
900 int l;
901
902 l = strlen(msg);
903 if (!l) {
904 isdn_tty_modem_result(RESULT_ERROR, info);
905 return;
906 }
907 for (j = 7; j >= 0; j--)
908 if (m->mdmreg[REG_SI1] & (1 << j)) {
909 si = bit2si[j];
910 break;
911 }
912 usg = isdn_calc_usage(si, l2);
913 #ifdef CONFIG_ISDN_AUDIO
914 if ((si == 1) &&
915 (l2 != ISDN_PROTO_L2_MODEM)
916 #ifdef CONFIG_ISDN_TTY_FAX
917 && (l2 != ISDN_PROTO_L2_FAX)
918 #endif
919 ) {
920 l2 = ISDN_PROTO_L2_TRANS;
921 usg = ISDN_USAGE_VOICE;
922 }
923 #endif
924 m->mdmreg[REG_SI1I] = si2bit[si];
925 spin_lock_irqsave(&dev->lock, flags);
926 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
927 if (i < 0) {
928 spin_unlock_irqrestore(&dev->lock, flags);
929 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
930 } else {
931 info->isdn_driver = dev->drvmap[i];
932 info->isdn_channel = dev->chanmap[i];
933 info->drv_index = i;
934 dev->m_idx[i] = info->line;
935 dev->usage[i] |= ISDN_USAGE_OUTGOING;
936 info->last_dir = 1;
937 isdn_info_update();
938 spin_unlock_irqrestore(&dev->lock, flags);
939 cmd.driver = info->isdn_driver;
940 cmd.arg = info->isdn_channel;
941 cmd.command = ISDN_CMD_CLREAZ;
942 isdn_command(&cmd);
943 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
944 cmd.driver = info->isdn_driver;
945 cmd.command = ISDN_CMD_SETEAZ;
946 isdn_command(&cmd);
947 cmd.driver = info->isdn_driver;
948 cmd.command = ISDN_CMD_SETL2;
949 info->last_l2 = l2;
950 cmd.arg = info->isdn_channel + (l2 << 8);
951 isdn_command(&cmd);
952 cmd.driver = info->isdn_driver;
953 cmd.command = ISDN_CMD_SETL3;
954 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
955 isdn_command(&cmd);
956 cmd.driver = info->isdn_driver;
957 cmd.arg = info->isdn_channel;
958 cmd.parm.cmsg.Length = l+14;
959 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
960 cmd.parm.cmsg.Subcommand = CAPI_REQ;
961 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
962 cmd.parm.cmsg.para[0] = l+1;
963 strncpy(&cmd.parm.cmsg.para[1], msg, l);
964 cmd.parm.cmsg.para[l+1] = 0xd;
965 cmd.command =CAPI_PUT_MESSAGE;
966 /* info->dialing = 1;
967 strcpy(dev->num[i], n);
968 isdn_info_update();
969 */
970 isdn_command(&cmd);
971 }
972 }
973
974 static inline int
975 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
976 {
977 #ifdef MODEM_PARANOIA_CHECK
978 if (!info) {
979 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
980 name, routine);
981 return 1;
982 }
983 if (info->magic != ISDN_ASYNC_MAGIC) {
984 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
985 name, routine);
986 return 1;
987 }
988 #endif
989 return 0;
990 }
991
992 /*
993 * This routine is called to set the UART divisor registers to match
994 * the specified baud rate for a serial port.
995 */
996 static void
997 isdn_tty_change_speed(modem_info * info)
998 {
999 uint cflag,
1000 cval,
1001 fcr,
1002 quot;
1003 int i;
1004
1005 if (!info->tty || !info->tty->termios)
1006 return;
1007 cflag = info->tty->termios->c_cflag;
1008
1009 quot = i = cflag & CBAUD;
1010 if (i & CBAUDEX) {
1011 i &= ~CBAUDEX;
1012 if (i < 1 || i > 2)
1013 info->tty->termios->c_cflag &= ~CBAUDEX;
1014 else
1015 i += 15;
1016 }
1017 if (quot) {
1018 info->mcr |= UART_MCR_DTR;
1019 isdn_tty_modem_ncarrier(info);
1020 } else {
1021 info->mcr &= ~UART_MCR_DTR;
1022 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1023 #ifdef ISDN_DEBUG_MODEM_HUP
1024 printk(KERN_DEBUG "Mhup in changespeed\n");
1025 #endif
1026 if (info->online)
1027 info->ncarrier = 1;
1028 isdn_tty_modem_reset_regs(info, 0);
1029 isdn_tty_modem_hup(info, 1);
1030 }
1031 return;
1032 }
1033 /* byte size and parity */
1034 cval = cflag & (CSIZE | CSTOPB);
1035 cval >>= 4;
1036 if (cflag & PARENB)
1037 cval |= UART_LCR_PARITY;
1038 if (!(cflag & PARODD))
1039 cval |= UART_LCR_EPAR;
1040 fcr = 0;
1041
1042 /* CTS flow control flag and modem status interrupts */
1043 if (cflag & CRTSCTS) {
1044 info->flags |= ISDN_ASYNC_CTS_FLOW;
1045 } else
1046 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1047 if (cflag & CLOCAL)
1048 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1049 else {
1050 info->flags |= ISDN_ASYNC_CHECK_CD;
1051 }
1052 }
1053
1054 static int
1055 isdn_tty_startup(modem_info * info)
1056 {
1057 if (info->flags & ISDN_ASYNC_INITIALIZED)
1058 return 0;
1059 isdn_lock_drivers();
1060 #ifdef ISDN_DEBUG_MODEM_OPEN
1061 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1062 #endif
1063 /*
1064 * Now, initialize the UART
1065 */
1066 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1067 if (info->tty)
1068 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1069 /*
1070 * and set the speed of the serial port
1071 */
1072 isdn_tty_change_speed(info);
1073
1074 info->flags |= ISDN_ASYNC_INITIALIZED;
1075 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1076 info->send_outstanding = 0;
1077 return 0;
1078 }
1079
1080 /*
1081 * This routine will shutdown a serial port; interrupts are disabled, and
1082 * DTR is dropped if the hangup on close termio flag is on.
1083 */
1084 static void
1085 isdn_tty_shutdown(modem_info * info)
1086 {
1087 if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1088 return;
1089 #ifdef ISDN_DEBUG_MODEM_OPEN
1090 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1091 #endif
1092 isdn_unlock_drivers();
1093 info->msr &= ~UART_MSR_RI;
1094 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1095 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1096 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1097 isdn_tty_modem_reset_regs(info, 0);
1098 #ifdef ISDN_DEBUG_MODEM_HUP
1099 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1100 #endif
1101 isdn_tty_modem_hup(info, 1);
1102 }
1103 }
1104 if (info->tty)
1105 set_bit(TTY_IO_ERROR, &info->tty->flags);
1106
1107 info->flags &= ~ISDN_ASYNC_INITIALIZED;
1108 }
1109
1110 /* isdn_tty_write() is the main send-routine. It is called from the upper
1111 * levels within the kernel to perform sending data. Depending on the
1112 * online-flag it either directs output to the at-command-interpreter or
1113 * to the lower level. Additional tasks done here:
1114 * - If online, check for escape-sequence (+++)
1115 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1116 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1117 * - If dialing, abort dial.
1118 */
1119 static int
1120 isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
1121 {
1122 int c;
1123 int total = 0;
1124 modem_info *info = (modem_info *) tty->driver_data;
1125 atemu *m = &info->emu;
1126
1127 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1128 return 0;
1129 /* See isdn_tty_senddown() */
1130 atomic_inc(&info->xmit_lock);
1131 while (1) {
1132 c = count;
1133 if (c > info->xmit_size - info->xmit_count)
1134 c = info->xmit_size - info->xmit_count;
1135 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1136 c = dev->drv[info->isdn_driver]->maxbufsize;
1137 if (c <= 0)
1138 break;
1139 if ((info->online > 1)
1140 #ifdef CONFIG_ISDN_AUDIO
1141 || (info->vonline & 3)
1142 #endif
1143 ) {
1144 #ifdef CONFIG_ISDN_AUDIO
1145 if (!info->vonline)
1146 #endif
1147 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1148 &(m->pluscount),
1149 &(m->lastplus));
1150 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1151 #ifdef CONFIG_ISDN_AUDIO
1152 if (info->vonline) {
1153 int cc = isdn_tty_handleDLEdown(info, m, c);
1154 if (info->vonline & 2) {
1155 if (!cc) {
1156 /* If DLE decoding results in zero-transmit, but
1157 * c originally was non-zero, do a wakeup.
1158 */
1159 tty_wakeup(tty);
1160 info->msr |= UART_MSR_CTS;
1161 info->lsr |= UART_LSR_TEMT;
1162 }
1163 info->xmit_count += cc;
1164 }
1165 if ((info->vonline & 3) == 1) {
1166 /* Do NOT handle Ctrl-Q or Ctrl-S
1167 * when in full-duplex audio mode.
1168 */
1169 if (isdn_tty_end_vrx(buf, c)) {
1170 info->vonline &= ~1;
1171 #ifdef ISDN_DEBUG_MODEM_VOICE
1172 printk(KERN_DEBUG
1173 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1174 info->line);
1175 #endif
1176 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1177 }
1178 }
1179 } else
1180 if (TTY_IS_FCLASS1(info)) {
1181 int cc = isdn_tty_handleDLEdown(info, m, c);
1182
1183 if (info->vonline & 4) { /* ETX seen */
1184 isdn_ctrl c;
1185
1186 c.command = ISDN_CMD_FAXCMD;
1187 c.driver = info->isdn_driver;
1188 c.arg = info->isdn_channel;
1189 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1190 c.parm.aux.subcmd = ETX;
1191 isdn_command(&c);
1192 }
1193 info->vonline = 0;
1194 #ifdef ISDN_DEBUG_MODEM_VOICE
1195 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1196 #endif
1197 info->xmit_count += cc;
1198 } else
1199 #endif
1200 info->xmit_count += c;
1201 } else {
1202 info->msr |= UART_MSR_CTS;
1203 info->lsr |= UART_LSR_TEMT;
1204 if (info->dialing) {
1205 info->dialing = 0;
1206 #ifdef ISDN_DEBUG_MODEM_HUP
1207 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1208 #endif
1209 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1210 isdn_tty_modem_hup(info, 1);
1211 } else
1212 c = isdn_tty_edit_at(buf, c, info);
1213 }
1214 buf += c;
1215 count -= c;
1216 total += c;
1217 }
1218 atomic_dec(&info->xmit_lock);
1219 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1220 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1221 isdn_tty_senddown(info);
1222 isdn_tty_tint(info);
1223 }
1224 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1225 }
1226 return total;
1227 }
1228
1229 static int
1230 isdn_tty_write_room(struct tty_struct *tty)
1231 {
1232 modem_info *info = (modem_info *) tty->driver_data;
1233 int ret;
1234
1235 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1236 return 0;
1237 if (!info->online)
1238 return info->xmit_size;
1239 ret = info->xmit_size - info->xmit_count;
1240 return (ret < 0) ? 0 : ret;
1241 }
1242
1243 static int
1244 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1245 {
1246 modem_info *info = (modem_info *) tty->driver_data;
1247
1248 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1249 return 0;
1250 if (!info->online)
1251 return 0;
1252 return (info->xmit_count);
1253 }
1254
1255 static void
1256 isdn_tty_flush_buffer(struct tty_struct *tty)
1257 {
1258 modem_info *info;
1259
1260 if (!tty) {
1261 return;
1262 }
1263 info = (modem_info *) tty->driver_data;
1264 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1265 return;
1266 }
1267 isdn_tty_cleanup_xmit(info);
1268 info->xmit_count = 0;
1269 tty_wakeup(tty);
1270 }
1271
1272 static void
1273 isdn_tty_flush_chars(struct tty_struct *tty)
1274 {
1275 modem_info *info = (modem_info *) tty->driver_data;
1276
1277 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1278 return;
1279 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1280 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1281 }
1282
1283 /*
1284 * ------------------------------------------------------------
1285 * isdn_tty_throttle()
1286 *
1287 * This routine is called by the upper-layer tty layer to signal that
1288 * incoming characters should be throttled.
1289 * ------------------------------------------------------------
1290 */
1291 static void
1292 isdn_tty_throttle(struct tty_struct *tty)
1293 {
1294 modem_info *info = (modem_info *) tty->driver_data;
1295
1296 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1297 return;
1298 if (I_IXOFF(tty))
1299 info->x_char = STOP_CHAR(tty);
1300 info->mcr &= ~UART_MCR_RTS;
1301 }
1302
1303 static void
1304 isdn_tty_unthrottle(struct tty_struct *tty)
1305 {
1306 modem_info *info = (modem_info *) tty->driver_data;
1307
1308 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1309 return;
1310 if (I_IXOFF(tty)) {
1311 if (info->x_char)
1312 info->x_char = 0;
1313 else
1314 info->x_char = START_CHAR(tty);
1315 }
1316 info->mcr |= UART_MCR_RTS;
1317 }
1318
1319 /*
1320 * ------------------------------------------------------------
1321 * isdn_tty_ioctl() and friends
1322 * ------------------------------------------------------------
1323 */
1324
1325 /*
1326 * isdn_tty_get_lsr_info - get line status register info
1327 *
1328 * Purpose: Let user call ioctl() to get info when the UART physically
1329 * is emptied. On bus types like RS485, the transmitter must
1330 * release the bus after transmitting. This must be done when
1331 * the transmit shift register is empty, not be done when the
1332 * transmit holding register is empty. This functionality
1333 * allows RS485 driver to be written in user space.
1334 */
1335 static int
1336 isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1337 {
1338 u_char status;
1339 uint result;
1340
1341 status = info->lsr;
1342 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1343 return put_user(result, value);
1344 }
1345
1346
1347 static int
1348 isdn_tty_tiocmget(struct tty_struct *tty)
1349 {
1350 modem_info *info = (modem_info *) tty->driver_data;
1351 u_char control, status;
1352
1353 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1354 return -ENODEV;
1355 if (tty->flags & (1 << TTY_IO_ERROR))
1356 return -EIO;
1357
1358 mutex_lock(&modem_info_mutex);
1359 #ifdef ISDN_DEBUG_MODEM_IOCTL
1360 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1361 #endif
1362
1363 control = info->mcr;
1364 status = info->msr;
1365 mutex_unlock(&modem_info_mutex);
1366 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1367 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1368 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1369 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1370 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1371 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1372 }
1373
1374 static int
1375 isdn_tty_tiocmset(struct tty_struct *tty,
1376 unsigned int set, unsigned int clear)
1377 {
1378 modem_info *info = (modem_info *) tty->driver_data;
1379
1380 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1381 return -ENODEV;
1382 if (tty->flags & (1 << TTY_IO_ERROR))
1383 return -EIO;
1384
1385 #ifdef ISDN_DEBUG_MODEM_IOCTL
1386 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1387 #endif
1388
1389 mutex_lock(&modem_info_mutex);
1390 if (set & TIOCM_RTS)
1391 info->mcr |= UART_MCR_RTS;
1392 if (set & TIOCM_DTR) {
1393 info->mcr |= UART_MCR_DTR;
1394 isdn_tty_modem_ncarrier(info);
1395 }
1396
1397 if (clear & TIOCM_RTS)
1398 info->mcr &= ~UART_MCR_RTS;
1399 if (clear & TIOCM_DTR) {
1400 info->mcr &= ~UART_MCR_DTR;
1401 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1402 isdn_tty_modem_reset_regs(info, 0);
1403 #ifdef ISDN_DEBUG_MODEM_HUP
1404 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1405 #endif
1406 if (info->online)
1407 info->ncarrier = 1;
1408 isdn_tty_modem_hup(info, 1);
1409 }
1410 }
1411 mutex_unlock(&modem_info_mutex);
1412 return 0;
1413 }
1414
1415 static int
1416 isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg)
1417 {
1418 modem_info *info = (modem_info *) tty->driver_data;
1419 int retval;
1420
1421 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1422 return -ENODEV;
1423 if (tty->flags & (1 << TTY_IO_ERROR))
1424 return -EIO;
1425 switch (cmd) {
1426 case TCSBRK: /* SVID version: non-zero arg --> no break */
1427 #ifdef ISDN_DEBUG_MODEM_IOCTL
1428 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1429 #endif
1430 retval = tty_check_change(tty);
1431 if (retval)
1432 return retval;
1433 tty_wait_until_sent(tty, 0);
1434 return 0;
1435 case TCSBRKP: /* support for POSIX tcsendbreak() */
1436 #ifdef ISDN_DEBUG_MODEM_IOCTL
1437 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1438 #endif
1439 retval = tty_check_change(tty);
1440 if (retval)
1441 return retval;
1442 tty_wait_until_sent(tty, 0);
1443 return 0;
1444 case TIOCSERGETLSR: /* Get line status register */
1445 #ifdef ISDN_DEBUG_MODEM_IOCTL
1446 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1447 #endif
1448 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1449 default:
1450 #ifdef ISDN_DEBUG_MODEM_IOCTL
1451 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1452 #endif
1453 return -ENOIOCTLCMD;
1454 }
1455 return 0;
1456 }
1457
1458 static void
1459 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1460 {
1461 modem_info *info = (modem_info *) tty->driver_data;
1462
1463 if (!old_termios)
1464 isdn_tty_change_speed(info);
1465 else {
1466 if (tty->termios->c_cflag == old_termios->c_cflag &&
1467 tty->termios->c_ispeed == old_termios->c_ispeed &&
1468 tty->termios->c_ospeed == old_termios->c_ospeed)
1469 return;
1470 isdn_tty_change_speed(info);
1471 if ((old_termios->c_cflag & CRTSCTS) &&
1472 !(tty->termios->c_cflag & CRTSCTS))
1473 tty->hw_stopped = 0;
1474 }
1475 }
1476
1477 /*
1478 * ------------------------------------------------------------
1479 * isdn_tty_open() and friends
1480 * ------------------------------------------------------------
1481 */
1482 static int
1483 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1484 {
1485 DECLARE_WAITQUEUE(wait, NULL);
1486 int do_clocal = 0;
1487 int retval;
1488
1489 /*
1490 * If the device is in the middle of being closed, then block
1491 * until it's done, and then try again.
1492 */
1493 if (tty_hung_up_p(filp) ||
1494 (info->flags & ISDN_ASYNC_CLOSING)) {
1495 if (info->flags & ISDN_ASYNC_CLOSING)
1496 interruptible_sleep_on(&info->close_wait);
1497 #ifdef MODEM_DO_RESTART
1498 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1499 return -EAGAIN;
1500 else
1501 return -ERESTARTSYS;
1502 #else
1503 return -EAGAIN;
1504 #endif
1505 }
1506 /*
1507 * If non-blocking mode is set, then make the check up front
1508 * and then exit.
1509 */
1510 if ((filp->f_flags & O_NONBLOCK) ||
1511 (tty->flags & (1 << TTY_IO_ERROR))) {
1512 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1513 return -EBUSY;
1514 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1515 return 0;
1516 }
1517 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1518 if (info->normal_termios.c_cflag & CLOCAL)
1519 do_clocal = 1;
1520 } else {
1521 if (tty->termios->c_cflag & CLOCAL)
1522 do_clocal = 1;
1523 }
1524 /*
1525 * Block waiting for the carrier detect and the line to become
1526 * free (i.e., not in use by the callout). While we are in
1527 * this loop, info->count is dropped by one, so that
1528 * isdn_tty_close() knows when to free things. We restore it upon
1529 * exit, either normal or abnormal.
1530 */
1531 retval = 0;
1532 add_wait_queue(&info->open_wait, &wait);
1533 #ifdef ISDN_DEBUG_MODEM_OPEN
1534 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1535 info->line, info->count);
1536 #endif
1537 if (!(tty_hung_up_p(filp)))
1538 info->count--;
1539 info->blocked_open++;
1540 while (1) {
1541 set_current_state(TASK_INTERRUPTIBLE);
1542 if (tty_hung_up_p(filp) ||
1543 !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1544 #ifdef MODEM_DO_RESTART
1545 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1546 retval = -EAGAIN;
1547 else
1548 retval = -ERESTARTSYS;
1549 #else
1550 retval = -EAGAIN;
1551 #endif
1552 break;
1553 }
1554 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1555 !(info->flags & ISDN_ASYNC_CLOSING) &&
1556 (do_clocal || (info->msr & UART_MSR_DCD))) {
1557 break;
1558 }
1559 if (signal_pending(current)) {
1560 retval = -ERESTARTSYS;
1561 break;
1562 }
1563 #ifdef ISDN_DEBUG_MODEM_OPEN
1564 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1565 info->line, info->count);
1566 #endif
1567 schedule();
1568 }
1569 current->state = TASK_RUNNING;
1570 remove_wait_queue(&info->open_wait, &wait);
1571 if (!tty_hung_up_p(filp))
1572 info->count++;
1573 info->blocked_open--;
1574 #ifdef ISDN_DEBUG_MODEM_OPEN
1575 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1576 info->line, info->count);
1577 #endif
1578 if (retval)
1579 return retval;
1580 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1581 return 0;
1582 }
1583
1584 /*
1585 * This routine is called whenever a serial port is opened. It
1586 * enables interrupts for a serial port, linking in its async structure into
1587 * the IRQ chain. It also performs the serial-specific
1588 * initialization for the tty structure.
1589 */
1590 static int
1591 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1592 {
1593 modem_info *info;
1594 int retval, line;
1595
1596 line = tty->index;
1597 if (line < 0 || line >= ISDN_MAX_CHANNELS)
1598 return -ENODEV;
1599 info = &dev->mdm.info[line];
1600 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1601 return -ENODEV;
1602 if (!try_module_get(info->owner)) {
1603 printk(KERN_WARNING "%s: cannot reserve module\n", __func__);
1604 return -ENODEV;
1605 }
1606 #ifdef ISDN_DEBUG_MODEM_OPEN
1607 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1608 info->count);
1609 #endif
1610 info->count++;
1611 tty->driver_data = info;
1612 info->tty = tty;
1613 /*
1614 * Start up serial port
1615 */
1616 retval = isdn_tty_startup(info);
1617 if (retval) {
1618 #ifdef ISDN_DEBUG_MODEM_OPEN
1619 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1620 #endif
1621 module_put(info->owner);
1622 return retval;
1623 }
1624 retval = isdn_tty_block_til_ready(tty, filp, info);
1625 if (retval) {
1626 #ifdef ISDN_DEBUG_MODEM_OPEN
1627 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1628 #endif
1629 module_put(info->owner);
1630 return retval;
1631 }
1632 #ifdef ISDN_DEBUG_MODEM_OPEN
1633 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1634 #endif
1635 dev->modempoll++;
1636 #ifdef ISDN_DEBUG_MODEM_OPEN
1637 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1638 #endif
1639 return 0;
1640 }
1641
1642 static void
1643 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1644 {
1645 modem_info *info = (modem_info *) tty->driver_data;
1646 ulong timeout;
1647
1648 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1649 return;
1650 if (tty_hung_up_p(filp)) {
1651 #ifdef ISDN_DEBUG_MODEM_OPEN
1652 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1653 #endif
1654 return;
1655 }
1656 if ((tty->count == 1) && (info->count != 1)) {
1657 /*
1658 * Uh, oh. tty->count is 1, which means that the tty
1659 * structure will be freed. Info->count should always
1660 * be one in these conditions. If it's greater than
1661 * one, we've got real problems, since it means the
1662 * serial port won't be shutdown.
1663 */
1664 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1665 "info->count is %d\n", info->count);
1666 info->count = 1;
1667 }
1668 if (--info->count < 0) {
1669 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1670 info->line, info->count);
1671 info->count = 0;
1672 }
1673 if (info->count) {
1674 #ifdef ISDN_DEBUG_MODEM_OPEN
1675 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1676 #endif
1677 module_put(info->owner);
1678 return;
1679 }
1680 info->flags |= ISDN_ASYNC_CLOSING;
1681 /*
1682 * Save the termios structure, since this port may have
1683 * separate termios for callout and dialin.
1684 */
1685 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1686 info->normal_termios = *tty->termios;
1687 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1688 info->callout_termios = *tty->termios;
1689
1690 tty->closing = 1;
1691 /*
1692 * At this point we stop accepting input. To do this, we
1693 * disable the receive line status interrupts, and tell the
1694 * interrupt driver to stop checking the data ready bit in the
1695 * line status register.
1696 */
1697 if (info->flags & ISDN_ASYNC_INITIALIZED) {
1698 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1699 /*
1700 * Before we drop DTR, make sure the UART transmitter
1701 * has completely drained; this is especially
1702 * important if there is a transmit FIFO!
1703 */
1704 timeout = jiffies + HZ;
1705 while (!(info->lsr & UART_LSR_TEMT)) {
1706 schedule_timeout_interruptible(20);
1707 if (time_after(jiffies,timeout))
1708 break;
1709 }
1710 }
1711 dev->modempoll--;
1712 isdn_tty_shutdown(info);
1713 isdn_tty_flush_buffer(tty);
1714 tty_ldisc_flush(tty);
1715 info->tty = NULL;
1716 info->ncarrier = 0;
1717 tty->closing = 0;
1718 module_put(info->owner);
1719 if (info->blocked_open) {
1720 msleep_interruptible(500);
1721 wake_up_interruptible(&info->open_wait);
1722 }
1723 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1724 wake_up_interruptible(&info->close_wait);
1725 #ifdef ISDN_DEBUG_MODEM_OPEN
1726 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1727 #endif
1728 }
1729
1730 /*
1731 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1732 */
1733 static void
1734 isdn_tty_hangup(struct tty_struct *tty)
1735 {
1736 modem_info *info = (modem_info *) tty->driver_data;
1737
1738 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1739 return;
1740 isdn_tty_shutdown(info);
1741 info->count = 0;
1742 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1743 info->tty = NULL;
1744 wake_up_interruptible(&info->open_wait);
1745 }
1746
1747 /* This routine initializes all emulator-data.
1748 */
1749 static void
1750 isdn_tty_reset_profile(atemu * m)
1751 {
1752 m->profile[0] = 0;
1753 m->profile[1] = 0;
1754 m->profile[2] = 43;
1755 m->profile[3] = 13;
1756 m->profile[4] = 10;
1757 m->profile[5] = 8;
1758 m->profile[6] = 3;
1759 m->profile[7] = 60;
1760 m->profile[8] = 2;
1761 m->profile[9] = 6;
1762 m->profile[10] = 7;
1763 m->profile[11] = 70;
1764 m->profile[12] = 0x45;
1765 m->profile[13] = 4;
1766 m->profile[14] = ISDN_PROTO_L2_X75I;
1767 m->profile[15] = ISDN_PROTO_L3_TRANS;
1768 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1769 m->profile[17] = ISDN_MODEM_WINSIZE;
1770 m->profile[18] = 4;
1771 m->profile[19] = 0;
1772 m->profile[20] = 0;
1773 m->profile[23] = 0;
1774 m->pmsn[0] = '\0';
1775 m->plmsn[0] = '\0';
1776 }
1777
1778 #ifdef CONFIG_ISDN_AUDIO
1779 static void
1780 isdn_tty_modem_reset_vpar(atemu * m)
1781 {
1782 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1783 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1784 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1785 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1786 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1787 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1788 }
1789 #endif
1790
1791 #ifdef CONFIG_ISDN_TTY_FAX
1792 static void
1793 isdn_tty_modem_reset_faxpar(modem_info * info)
1794 {
1795 T30_s *f = info->fax;
1796
1797 f->code = 0;
1798 f->phase = ISDN_FAX_PHASE_IDLE;
1799 f->direction = 0;
1800 f->resolution = 1; /* fine */
1801 f->rate = 5; /* 14400 bit/s */
1802 f->width = 0;
1803 f->length = 0;
1804 f->compression = 0;
1805 f->ecm = 0;
1806 f->binary = 0;
1807 f->scantime = 0;
1808 memset(&f->id[0], 32, FAXIDLEN - 1);
1809 f->id[FAXIDLEN - 1] = 0;
1810 f->badlin = 0;
1811 f->badmul = 0;
1812 f->bor = 0;
1813 f->nbc = 0;
1814 f->cq = 0;
1815 f->cr = 0;
1816 f->ctcrty = 0;
1817 f->minsp = 0;
1818 f->phcto = 30;
1819 f->rel = 0;
1820 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1821 f->pollid[FAXIDLEN - 1] = 0;
1822 }
1823 #endif
1824
1825 static void
1826 isdn_tty_modem_reset_regs(modem_info * info, int force)
1827 {
1828 atemu *m = &info->emu;
1829 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1830 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1831 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1832 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1833 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1834 }
1835 #ifdef CONFIG_ISDN_AUDIO
1836 isdn_tty_modem_reset_vpar(m);
1837 #endif
1838 #ifdef CONFIG_ISDN_TTY_FAX
1839 isdn_tty_modem_reset_faxpar(info);
1840 #endif
1841 m->mdmcmdl = 0;
1842 }
1843
1844 static void
1845 modem_write_profile(atemu * m)
1846 {
1847 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1848 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1849 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1850 if (dev->profd)
1851 send_sig(SIGIO, dev->profd, 1);
1852 }
1853
1854 static const struct tty_operations modem_ops = {
1855 .open = isdn_tty_open,
1856 .close = isdn_tty_close,
1857 .write = isdn_tty_write,
1858 .flush_chars = isdn_tty_flush_chars,
1859 .write_room = isdn_tty_write_room,
1860 .chars_in_buffer = isdn_tty_chars_in_buffer,
1861 .flush_buffer = isdn_tty_flush_buffer,
1862 .ioctl = isdn_tty_ioctl,
1863 .throttle = isdn_tty_throttle,
1864 .unthrottle = isdn_tty_unthrottle,
1865 .set_termios = isdn_tty_set_termios,
1866 .hangup = isdn_tty_hangup,
1867 .tiocmget = isdn_tty_tiocmget,
1868 .tiocmset = isdn_tty_tiocmset,
1869 };
1870
1871 int
1872 isdn_tty_modem_init(void)
1873 {
1874 isdn_modem_t *m;
1875 int i, retval;
1876 modem_info *info;
1877
1878 m = &dev->mdm;
1879 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1880 if (!m->tty_modem)
1881 return -ENOMEM;
1882 m->tty_modem->name = "ttyI";
1883 m->tty_modem->major = ISDN_TTY_MAJOR;
1884 m->tty_modem->minor_start = 0;
1885 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1886 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1887 m->tty_modem->init_termios = tty_std_termios;
1888 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1889 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1890 m->tty_modem->driver_name = "isdn_tty";
1891 tty_set_operations(m->tty_modem, &modem_ops);
1892 retval = tty_register_driver(m->tty_modem);
1893 if (retval) {
1894 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1895 goto err;
1896 }
1897 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1898 info = &m->info[i];
1899 #ifdef CONFIG_ISDN_TTY_FAX
1900 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1901 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1902 retval = -ENOMEM;
1903 goto err_unregister;
1904 }
1905 #endif
1906 #ifdef MODULE
1907 info->owner = THIS_MODULE;
1908 #endif
1909 spin_lock_init(&info->readlock);
1910 sprintf(info->last_cause, "0000");
1911 sprintf(info->last_num, "none");
1912 info->last_dir = 0;
1913 info->last_lhup = 1;
1914 info->last_l2 = -1;
1915 info->last_si = 0;
1916 isdn_tty_reset_profile(&info->emu);
1917 isdn_tty_modem_reset_regs(info, 1);
1918 info->magic = ISDN_ASYNC_MAGIC;
1919 info->line = i;
1920 info->tty = NULL;
1921 info->x_char = 0;
1922 info->count = 0;
1923 info->blocked_open = 0;
1924 init_waitqueue_head(&info->open_wait);
1925 init_waitqueue_head(&info->close_wait);
1926 info->isdn_driver = -1;
1927 info->isdn_channel = -1;
1928 info->drv_index = -1;
1929 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1930 init_timer(&info->nc_timer);
1931 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1932 info->nc_timer.data = (unsigned long) info;
1933 skb_queue_head_init(&info->xmit_queue);
1934 #ifdef CONFIG_ISDN_AUDIO
1935 skb_queue_head_init(&info->dtmf_queue);
1936 #endif
1937 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1938 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1939 retval = -ENOMEM;
1940 goto err_unregister;
1941 }
1942 /* Make room for T.70 header */
1943 info->xmit_buf += 4;
1944 }
1945 return 0;
1946 err_unregister:
1947 for (i--; i >= 0; i--) {
1948 info = &m->info[i];
1949 #ifdef CONFIG_ISDN_TTY_FAX
1950 kfree(info->fax);
1951 #endif
1952 kfree(info->xmit_buf - 4);
1953 }
1954 tty_unregister_driver(m->tty_modem);
1955 err:
1956 put_tty_driver(m->tty_modem);
1957 m->tty_modem = NULL;
1958 return retval;
1959 }
1960
1961 void
1962 isdn_tty_exit(void)
1963 {
1964 modem_info *info;
1965 int i;
1966
1967 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1968 info = &dev->mdm.info[i];
1969 isdn_tty_cleanup_xmit(info);
1970 #ifdef CONFIG_ISDN_TTY_FAX
1971 kfree(info->fax);
1972 #endif
1973 kfree(info->xmit_buf - 4);
1974 }
1975 tty_unregister_driver(dev->mdm.tty_modem);
1976 put_tty_driver(dev->mdm.tty_modem);
1977 dev->mdm.tty_modem = NULL;
1978 }
1979
1980
1981 /*
1982 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1983 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1984 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1985 */
1986
1987 static int
1988 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1989 {
1990 #ifdef ISDN_DEBUG_MODEM_ICALL
1991 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1992 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1993 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1994 #endif
1995 if (strlen(emu->lmsn)) {
1996 char *p = emu->lmsn;
1997 char *q;
1998 int tmp;
1999 int ret = 0;
2000
2001 while (1) {
2002 if ((q = strchr(p, ';')))
2003 *q = '\0';
2004 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2005 ret = tmp;
2006 #ifdef ISDN_DEBUG_MODEM_ICALL
2007 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2008 p, isdn_map_eaz2msn(emu->msn, di), tmp);
2009 #endif
2010 if (q) {
2011 *q = ';';
2012 p = q;
2013 p++;
2014 }
2015 if (!tmp)
2016 return 0;
2017 if (!q)
2018 break;
2019 }
2020 return ret;
2021 } else {
2022 int tmp;
2023 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2024 #ifdef ISDN_DEBUG_MODEM_ICALL
2025 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2026 isdn_map_eaz2msn(emu->msn, di), tmp);
2027 #endif
2028 return tmp;
2029 }
2030 }
2031
2032 /*
2033 * An incoming call-request has arrived.
2034 * Search the tty-devices for an appropriate device and bind
2035 * it to the ISDN-Channel.
2036 * Return:
2037 *
2038 * 0 = No matching device found.
2039 * 1 = A matching device found.
2040 * 3 = No match found, but eventually would match, if
2041 * CID is longer.
2042 */
2043 int
2044 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2045 {
2046 char *eaz;
2047 int i;
2048 int wret;
2049 int idx;
2050 int si1;
2051 int si2;
2052 char *nr;
2053 ulong flags;
2054
2055 if (!setup->phone[0]) {
2056 nr = "0";
2057 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2058 } else
2059 nr = setup->phone;
2060 si1 = (int) setup->si1;
2061 si2 = (int) setup->si2;
2062 if (!setup->eazmsn[0]) {
2063 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2064 eaz = "0";
2065 } else
2066 eaz = setup->eazmsn;
2067 #ifdef ISDN_DEBUG_MODEM_ICALL
2068 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2069 #endif
2070 wret = 0;
2071 spin_lock_irqsave(&dev->lock, flags);
2072 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2073 modem_info *info = &dev->mdm.info[i];
2074
2075 if (info->count == 0)
2076 continue;
2077 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
2078 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
2079 idx = isdn_dc2minor(di, ch);
2080 #ifdef ISDN_DEBUG_MODEM_ICALL
2081 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2082 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2083 info->flags, info->isdn_driver, info->isdn_channel,
2084 dev->usage[idx]);
2085 #endif
2086 if (
2087 #ifndef FIX_FILE_TRANSFER
2088 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2089 #endif
2090 (info->isdn_driver == -1) &&
2091 (info->isdn_channel == -1) &&
2092 (USG_NONE(dev->usage[idx]))) {
2093 int matchret;
2094
2095 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2096 wret = matchret;
2097 if (!matchret) { /* EAZ is matching */
2098 info->isdn_driver = di;
2099 info->isdn_channel = ch;
2100 info->drv_index = idx;
2101 dev->m_idx[idx] = info->line;
2102 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2103 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2104 strcpy(dev->num[idx], nr);
2105 strcpy(info->emu.cpn, eaz);
2106 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2107 info->emu.mdmreg[REG_PLAN] = setup->plan;
2108 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2109 isdn_info_update();
2110 spin_unlock_irqrestore(&dev->lock, flags);
2111 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2112 info->line);
2113 info->msr |= UART_MSR_RI;
2114 isdn_tty_modem_result(RESULT_RING, info);
2115 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2116 return 1;
2117 }
2118 }
2119 }
2120 }
2121 spin_unlock_irqrestore(&dev->lock, flags);
2122 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2123 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2124 return (wret == 2)?3:0;
2125 }
2126
2127 #define TTY_IS_ACTIVE(info) \
2128 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2129
2130 int
2131 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2132 {
2133 int mi;
2134 modem_info *info;
2135 char *e;
2136
2137 if (i < 0)
2138 return 0;
2139 if ((mi = dev->m_idx[i]) >= 0) {
2140 info = &dev->mdm.info[mi];
2141 switch (c->command) {
2142 case ISDN_STAT_CINF:
2143 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2144 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2145 if (e == (char *)c->parm.num)
2146 info->emu.charge = 0;
2147
2148 break;
2149 case ISDN_STAT_BSENT:
2150 #ifdef ISDN_TTY_STAT_DEBUG
2151 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2152 #endif
2153 if ((info->isdn_driver == c->driver) &&
2154 (info->isdn_channel == c->arg)) {
2155 info->msr |= UART_MSR_CTS;
2156 if (info->send_outstanding)
2157 if (!(--info->send_outstanding))
2158 info->lsr |= UART_LSR_TEMT;
2159 isdn_tty_tint(info);
2160 return 1;
2161 }
2162 break;
2163 case ISDN_STAT_CAUSE:
2164 #ifdef ISDN_TTY_STAT_DEBUG
2165 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2166 #endif
2167 /* Signal cause to tty-device */
2168 strncpy(info->last_cause, c->parm.num, 5);
2169 return 1;
2170 case ISDN_STAT_DISPLAY:
2171 #ifdef ISDN_TTY_STAT_DEBUG
2172 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2173 #endif
2174 /* Signal display to tty-device */
2175 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2176 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2177 isdn_tty_at_cout("\r\n", info);
2178 isdn_tty_at_cout("DISPLAY: ", info);
2179 isdn_tty_at_cout(c->parm.display, info);
2180 isdn_tty_at_cout("\r\n", info);
2181 }
2182 return 1;
2183 case ISDN_STAT_DCONN:
2184 #ifdef ISDN_TTY_STAT_DEBUG
2185 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2186 #endif
2187 if (TTY_IS_ACTIVE(info)) {
2188 if (info->dialing == 1) {
2189 info->dialing = 2;
2190 return 1;
2191 }
2192 }
2193 break;
2194 case ISDN_STAT_DHUP:
2195 #ifdef ISDN_TTY_STAT_DEBUG
2196 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2197 #endif
2198 if (TTY_IS_ACTIVE(info)) {
2199 if (info->dialing == 1)
2200 isdn_tty_modem_result(RESULT_BUSY, info);
2201 if (info->dialing > 1)
2202 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2203 info->dialing = 0;
2204 #ifdef ISDN_DEBUG_MODEM_HUP
2205 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2206 #endif
2207 isdn_tty_modem_hup(info, 0);
2208 return 1;
2209 }
2210 break;
2211 case ISDN_STAT_BCONN:
2212 #ifdef ISDN_TTY_STAT_DEBUG
2213 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2214 #endif
2215 /* Wake up any processes waiting
2216 * for incoming call of this device when
2217 * DCD follow the state of incoming carrier
2218 */
2219 if (info->blocked_open &&
2220 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2221 wake_up_interruptible(&info->open_wait);
2222 }
2223
2224 /* Schedule CONNECT-Message to any tty
2225 * waiting for it and
2226 * set DCD-bit of its modem-status.
2227 */
2228 if (TTY_IS_ACTIVE(info) ||
2229 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2230 info->msr |= UART_MSR_DCD;
2231 info->emu.charge = 0;
2232 if (info->dialing & 0xf)
2233 info->last_dir = 1;
2234 else
2235 info->last_dir = 0;
2236 info->dialing = 0;
2237 info->rcvsched = 1;
2238 if (USG_MODEM(dev->usage[i])) {
2239 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2240 strcpy(info->emu.connmsg, c->parm.num);
2241 isdn_tty_modem_result(RESULT_CONNECT, info);
2242 } else
2243 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2244 }
2245 if (USG_VOICE(dev->usage[i]))
2246 isdn_tty_modem_result(RESULT_VCON, info);
2247 return 1;
2248 }
2249 break;
2250 case ISDN_STAT_BHUP:
2251 #ifdef ISDN_TTY_STAT_DEBUG
2252 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2253 #endif
2254 if (TTY_IS_ACTIVE(info)) {
2255 #ifdef ISDN_DEBUG_MODEM_HUP
2256 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2257 #endif
2258 isdn_tty_modem_hup(info, 0);
2259 return 1;
2260 }
2261 break;
2262 case ISDN_STAT_NODCH:
2263 #ifdef ISDN_TTY_STAT_DEBUG
2264 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2265 #endif
2266 if (TTY_IS_ACTIVE(info)) {
2267 if (info->dialing) {
2268 info->dialing = 0;
2269 info->last_l2 = -1;
2270 info->last_si = 0;
2271 sprintf(info->last_cause, "0000");
2272 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2273 }
2274 isdn_tty_modem_hup(info, 0);
2275 return 1;
2276 }
2277 break;
2278 case ISDN_STAT_UNLOAD:
2279 #ifdef ISDN_TTY_STAT_DEBUG
2280 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2281 #endif
2282 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2283 info = &dev->mdm.info[i];
2284 if (info->isdn_driver == c->driver) {
2285 if (info->online)
2286 isdn_tty_modem_hup(info, 1);
2287 }
2288 }
2289 return 1;
2290 #ifdef CONFIG_ISDN_TTY_FAX
2291 case ISDN_STAT_FAXIND:
2292 if (TTY_IS_ACTIVE(info)) {
2293 isdn_tty_fax_command(info, c);
2294 }
2295 break;
2296 #endif
2297 #ifdef CONFIG_ISDN_AUDIO
2298 case ISDN_STAT_AUDIO:
2299 if (TTY_IS_ACTIVE(info)) {
2300 switch(c->parm.num[0]) {
2301 case ISDN_AUDIO_DTMF:
2302 if (info->vonline) {
2303 isdn_audio_put_dle_code(info,
2304 c->parm.num[1]);
2305 }
2306 break;
2307 }
2308 }
2309 break;
2310 #endif
2311 }
2312 }
2313 return 0;
2314 }
2315
2316 /*********************************************************************
2317 Modem-Emulator-Routines
2318 *********************************************************************/
2319
2320 #define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2321
2322 /*
2323 * Put a message from the AT-emulator into receive-buffer of tty,
2324 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2325 */
2326 void
2327 isdn_tty_at_cout(char *msg, modem_info * info)
2328 {
2329 struct tty_struct *tty;
2330 atemu *m = &info->emu;
2331 char *p;
2332 char c;
2333 u_long flags;
2334 struct sk_buff *skb = NULL;
2335 char *sp = NULL;
2336 int l;
2337
2338 if (!msg) {
2339 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2340 return;
2341 }
2342
2343 l = strlen(msg);
2344
2345 spin_lock_irqsave(&info->readlock, flags);
2346 tty = info->tty;
2347 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2348 spin_unlock_irqrestore(&info->readlock, flags);
2349 return;
2350 }
2351
2352 /* use queue instead of direct, if online and */
2353 /* data is in queue or buffer is full */
2354 if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2355 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2356 skb = alloc_skb(l, GFP_ATOMIC);
2357 if (!skb) {
2358 spin_unlock_irqrestore(&info->readlock, flags);
2359 return;
2360 }
2361 sp = skb_put(skb, l);
2362 #ifdef CONFIG_ISDN_AUDIO
2363 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2364 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2365 #endif
2366 }
2367
2368 for (p = msg; *p; p++) {
2369 switch (*p) {
2370 case '\r':
2371 c = m->mdmreg[REG_CR];
2372 break;
2373 case '\n':
2374 c = m->mdmreg[REG_LF];
2375 break;
2376 case '\b':
2377 c = m->mdmreg[REG_BS];
2378 break;
2379 default:
2380 c = *p;
2381 }
2382 if (skb) {
2383 *sp++ = c;
2384 } else {
2385 if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
2386 break;
2387 }
2388 }
2389 if (skb) {
2390 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2391 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2392 spin_unlock_irqrestore(&info->readlock, flags);
2393 /* Schedule dequeuing */
2394 if (dev->modempoll && info->rcvsched)
2395 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2396
2397 } else {
2398 spin_unlock_irqrestore(&info->readlock, flags);
2399 tty_flip_buffer_push(tty);
2400 }
2401 }
2402
2403 /*
2404 * Perform ATH Hangup
2405 */
2406 static void
2407 isdn_tty_on_hook(modem_info * info)
2408 {
2409 if (info->isdn_channel >= 0) {
2410 #ifdef ISDN_DEBUG_MODEM_HUP
2411 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2412 #endif
2413 isdn_tty_modem_hup(info, 1);
2414 }
2415 }
2416
2417 static void
2418 isdn_tty_off_hook(void)
2419 {
2420 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2421 }
2422
2423 #define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
2424 #define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
2425
2426 /*
2427 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2428 * isdn_tty_modem_escape() if sequence found.
2429 *
2430 * Parameters:
2431 * p pointer to databuffer
2432 * plus escape-character
2433 * count length of buffer
2434 * pluscount count of valid escape-characters so far
2435 * lastplus timestamp of last character
2436 */
2437 static void
2438 isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2439 u_long *lastplus)
2440 {
2441 if (plus > 127)
2442 return;
2443 if (count > 3) {
2444 p += count - 3;
2445 count = 3;
2446 *pluscount = 0;
2447 }
2448 while (count > 0) {
2449 if (*(p++) == plus) {
2450 if ((*pluscount)++) {
2451 /* Time since last '+' > 0.5 sec. ? */
2452 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2453 *pluscount = 1;
2454 } else {
2455 /* Time since last non-'+' < 1.5 sec. ? */
2456 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2457 *pluscount = 0;
2458 }
2459 if ((*pluscount == 3) && (count == 1))
2460 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2461 if (*pluscount > 3)
2462 *pluscount = 1;
2463 } else
2464 *pluscount = 0;
2465 *lastplus = jiffies;
2466 count--;
2467 }
2468 }
2469
2470 /*
2471 * Return result of AT-emulator to tty-receive-buffer, depending on
2472 * modem-register 12, bit 0 and 1.
2473 * For CONNECT-messages also switch to online-mode.
2474 * For RING-message handle auto-ATA if register 0 != 0
2475 */
2476
2477 static void
2478 isdn_tty_modem_result(int code, modem_info * info)
2479 {
2480 atemu *m = &info->emu;
2481 static char *msg[] =
2482 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2483 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2484 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2485 char s[ISDN_MSNLEN+10];
2486
2487 switch (code) {
2488 case RESULT_RING:
2489 m->mdmreg[REG_RINGCNT]++;
2490 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2491 /* Automatically accept incoming call */
2492 isdn_tty_cmd_ATA(info);
2493 break;
2494 case RESULT_NO_CARRIER:
2495 #ifdef ISDN_DEBUG_MODEM_HUP
2496 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2497 (info->flags & ISDN_ASYNC_CLOSING),
2498 (!info->tty));
2499 #endif
2500 m->mdmreg[REG_RINGCNT] = 0;
2501 del_timer(&info->nc_timer);
2502 info->ncarrier = 0;
2503 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2504 return;
2505 }
2506 #ifdef CONFIG_ISDN_AUDIO
2507 if (info->vonline & 1) {
2508 #ifdef ISDN_DEBUG_MODEM_VOICE
2509 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2510 info->line);
2511 #endif
2512 /* voice-recording, add DLE-ETX */
2513 isdn_tty_at_cout("\020\003", info);
2514 }
2515 if (info->vonline & 2) {
2516 #ifdef ISDN_DEBUG_MODEM_VOICE
2517 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2518 info->line);
2519 #endif
2520 /* voice-playing, add DLE-DC4 */
2521 isdn_tty_at_cout("\020\024", info);
2522 }
2523 #endif
2524 break;
2525 case RESULT_CONNECT:
2526 case RESULT_CONNECT64000:
2527 sprintf(info->last_cause, "0000");
2528 if (!info->online)
2529 info->online = 2;
2530 break;
2531 case RESULT_VCON:
2532 #ifdef ISDN_DEBUG_MODEM_VOICE
2533 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2534 info->line);
2535 #endif
2536 sprintf(info->last_cause, "0000");
2537 if (!info->online)
2538 info->online = 1;
2539 break;
2540 } /* switch(code) */
2541
2542 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2543 /* Show results */
2544 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2545 /* Show numeric results only */
2546 sprintf(s, "\r\n%d\r\n", code);
2547 isdn_tty_at_cout(s, info);
2548 } else {
2549 if (code == RESULT_RING) {
2550 /* return if "show RUNG" and ringcounter>1 */
2551 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2552 (m->mdmreg[REG_RINGCNT] > 1))
2553 return;
2554 /* print CID, _before_ _every_ ring */
2555 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2556 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2557 isdn_tty_at_cout(dev->num[info->drv_index], info);
2558 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2559 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2560 isdn_tty_at_cout(info->emu.cpn, info);
2561 }
2562 }
2563 }
2564 isdn_tty_at_cout("\r\n", info);
2565 isdn_tty_at_cout(msg[code], info);
2566 switch (code) {
2567 case RESULT_CONNECT:
2568 switch (m->mdmreg[REG_L2PROT]) {
2569 case ISDN_PROTO_L2_MODEM:
2570 isdn_tty_at_cout(" ", info);
2571 isdn_tty_at_cout(m->connmsg, info);
2572 break;
2573 }
2574 break;
2575 case RESULT_RING:
2576 /* Append CPN, if enabled */
2577 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2578 sprintf(s, "/%s", m->cpn);
2579 isdn_tty_at_cout(s, info);
2580 }
2581 /* Print CID only once, _after_ 1st RING */
2582 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2583 (m->mdmreg[REG_RINGCNT] == 1)) {
2584 isdn_tty_at_cout("\r\n", info);
2585 isdn_tty_at_cout("CALLER NUMBER: ", info);
2586 isdn_tty_at_cout(dev->num[info->drv_index], info);
2587 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2588 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2589 isdn_tty_at_cout(info->emu.cpn, info);
2590 }
2591 }
2592 break;
2593 case RESULT_NO_CARRIER:
2594 case RESULT_NO_DIALTONE:
2595 case RESULT_BUSY:
2596 case RESULT_NO_ANSWER:
2597 m->mdmreg[REG_RINGCNT] = 0;
2598 /* Append Cause-Message if enabled */
2599 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2600 sprintf(s, "/%s", info->last_cause);
2601 isdn_tty_at_cout(s, info);
2602 }
2603 break;
2604 case RESULT_CONNECT64000:
2605 /* Append Protocol to CONNECT message */
2606 switch (m->mdmreg[REG_L2PROT]) {
2607 case ISDN_PROTO_L2_X75I:
2608 case ISDN_PROTO_L2_X75UI:
2609 case ISDN_PROTO_L2_X75BUI:
2610 isdn_tty_at_cout("/X.75", info);
2611 break;
2612 case ISDN_PROTO_L2_HDLC:
2613 isdn_tty_at_cout("/HDLC", info);
2614 break;
2615 case ISDN_PROTO_L2_V11096:
2616 isdn_tty_at_cout("/V110/9600", info);
2617 break;
2618 case ISDN_PROTO_L2_V11019:
2619 isdn_tty_at_cout("/V110/19200", info);
2620 break;
2621 case ISDN_PROTO_L2_V11038:
2622 isdn_tty_at_cout("/V110/38400", info);
2623 break;
2624 }
2625 if (m->mdmreg[REG_T70] & BIT_T70) {
2626 isdn_tty_at_cout("/T.70", info);
2627 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2628 isdn_tty_at_cout("+", info);
2629 }
2630 break;
2631 }
2632 isdn_tty_at_cout("\r\n", info);
2633 }
2634 }
2635 if (code == RESULT_NO_CARRIER) {
2636 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2637 return;
2638 }
2639 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2640 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2641 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2642 tty_hangup(info->tty);
2643 }
2644 }
2645 }
2646
2647
2648 /*
2649 * Display a modem-register-value.
2650 */
2651 static void
2652 isdn_tty_show_profile(int ridx, modem_info * info)
2653 {
2654 char v[6];
2655
2656 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2657 isdn_tty_at_cout(v, info);
2658 }
2659
2660 /*
2661 * Get MSN-string from char-pointer, set pointer to end of number
2662 */
2663 static void
2664 isdn_tty_get_msnstr(char *n, char **p)
2665 {
2666 int limit = ISDN_MSNLEN - 1;
2667
2668 while (((*p[0] >= '0' && *p[0] <= '9') ||
2669 /* Why a comma ??? */
2670 (*p[0] == ',') || (*p[0] == ':')) &&
2671 (limit--))
2672 *n++ = *p[0]++;
2673 *n = '\0';
2674 }
2675
2676 /*
2677 * Get phone-number from modem-commandbuffer
2678 */
2679 static void
2680 isdn_tty_getdial(char *p, char *q,int cnt)
2681 {
2682 int first = 1;
2683 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2684 buffer overflow */
2685
2686 while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) {
2687 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2688 ((*p == 'R') && first) ||
2689 (*p == '*') || (*p == '#')) {
2690 *q++ = *p;
2691 limit--;
2692 }
2693 if(!limit)
2694 break;
2695 p++;
2696 first = 0;
2697 }
2698 *q = 0;
2699 }
2700
2701 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2702 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2703
2704 static void
2705 isdn_tty_report(modem_info * info)
2706 {
2707 atemu *m = &info->emu;
2708 char s[80];
2709
2710 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2711 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2712 isdn_tty_at_cout(s, info);
2713 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2714 isdn_tty_at_cout(s, info);
2715 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2716 switch (info->last_l2) {
2717 case ISDN_PROTO_L2_X75I:
2718 isdn_tty_at_cout("X.75i", info);
2719 break;
2720 case ISDN_PROTO_L2_X75UI:
2721 isdn_tty_at_cout("X.75ui", info);
2722 break;
2723 case ISDN_PROTO_L2_X75BUI:
2724 isdn_tty_at_cout("X.75bui", info);
2725 break;
2726 case ISDN_PROTO_L2_HDLC:
2727 isdn_tty_at_cout("HDLC", info);
2728 break;
2729 case ISDN_PROTO_L2_V11096:
2730 isdn_tty_at_cout("V.110 9600 Baud", info);
2731 break;
2732 case ISDN_PROTO_L2_V11019:
2733 isdn_tty_at_cout("V.110 19200 Baud", info);
2734 break;
2735 case ISDN_PROTO_L2_V11038:
2736 isdn_tty_at_cout("V.110 38400 Baud", info);
2737 break;
2738 case ISDN_PROTO_L2_TRANS:
2739 isdn_tty_at_cout("transparent", info);
2740 break;
2741 case ISDN_PROTO_L2_MODEM:
2742 isdn_tty_at_cout("modem", info);
2743 break;
2744 case ISDN_PROTO_L2_FAX:
2745 isdn_tty_at_cout("fax", info);
2746 break;
2747 default:
2748 isdn_tty_at_cout("unknown", info);
2749 break;
2750 }
2751 if (m->mdmreg[REG_T70] & BIT_T70) {
2752 isdn_tty_at_cout("/T.70", info);
2753 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2754 isdn_tty_at_cout("+", info);
2755 }
2756 isdn_tty_at_cout("\r\n", info);
2757 isdn_tty_at_cout(" Service: ", info);
2758 switch (info->last_si) {
2759 case 1:
2760 isdn_tty_at_cout("audio\r\n", info);
2761 break;
2762 case 5:
2763 isdn_tty_at_cout("btx\r\n", info);
2764 break;
2765 case 7:
2766 isdn_tty_at_cout("data\r\n", info);
2767 break;
2768 default:
2769 sprintf(s, "%d\r\n", info->last_si);
2770 isdn_tty_at_cout(s, info);
2771 break;
2772 }
2773 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2774 isdn_tty_at_cout(s, info);
2775 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2776 isdn_tty_at_cout(s, info);
2777 }
2778
2779 /*
2780 * Parse AT&.. commands.
2781 */
2782 static int
2783 isdn_tty_cmd_ATand(char **p, modem_info * info)
2784 {
2785 atemu *m = &info->emu;
2786 int i;
2787 char rb[100];
2788
2789 #define MAXRB (sizeof(rb) - 1)
2790
2791 switch (*p[0]) {
2792 case 'B':
2793 /* &B - Set Buffersize */
2794 p[0]++;
2795 i = isdn_getnum(p);
2796 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2797 PARSE_ERROR1;
2798 #ifdef CONFIG_ISDN_AUDIO
2799 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2800 PARSE_ERROR1;
2801 #endif
2802 m->mdmreg[REG_PSIZE] = i / 16;
2803 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2804 switch (m->mdmreg[REG_L2PROT]) {
2805 case ISDN_PROTO_L2_V11096:
2806 case ISDN_PROTO_L2_V11019:
2807 case ISDN_PROTO_L2_V11038:
2808 info->xmit_size /= 10;
2809 }
2810 break;
2811 case 'C':
2812 /* &C - DCD Status */
2813 p[0]++;
2814 switch (isdn_getnum(p)) {
2815 case 0:
2816 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2817 break;
2818 case 1:
2819 m->mdmreg[REG_DCD] |= BIT_DCD;
2820 break;
2821 default:
2822 PARSE_ERROR1
2823 }
2824 break;
2825 case 'D':
2826 /* &D - Set DTR-Low-behavior */
2827 p[0]++;
2828 switch (isdn_getnum(p)) {
2829 case 0:
2830 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2831 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2832 break;
2833 case 2:
2834 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2835 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2836 break;
2837 case 3:
2838 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2839 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2840 break;
2841 default:
2842 PARSE_ERROR1
2843 }
2844 break;
2845 case 'E':
2846 /* &E -Set EAZ/MSN */
2847 p[0]++;
2848 isdn_tty_get_msnstr(m->msn, p);
2849 break;
2850 case 'F':
2851 /* &F -Set Factory-Defaults */
2852 p[0]++;
2853 if (info->msr & UART_MSR_DCD)
2854 PARSE_ERROR1;
2855 isdn_tty_reset_profile(m);
2856 isdn_tty_modem_reset_regs(info, 1);
2857 break;
2858 #ifdef DUMMY_HAYES_AT
2859 case 'K':
2860 /* only for be compilant with common scripts */
2861 /* &K Flowcontrol - no function */
2862 p[0]++;
2863 isdn_getnum(p);
2864 break;
2865 #endif
2866 case 'L':
2867 /* &L -Set Numbers to listen on */
2868 p[0]++;
2869 i = 0;
2870 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2871 (i < ISDN_LMSNLEN - 1))
2872 m->lmsn[i++] = *p[0]++;
2873 m->lmsn[i] = '\0';
2874 break;
2875 case 'R':
2876 /* &R - Set V.110 bitrate adaption */
2877 p[0]++;
2878 i = isdn_getnum(p);
2879 switch (i) {
2880 case 0:
2881 /* Switch off V.110, back to X.75 */
2882 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2883 m->mdmreg[REG_SI2] = 0;
2884 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2885 break;
2886 case 9600:
2887 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2888 m->mdmreg[REG_SI2] = 197;
2889 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2890 break;
2891 case 19200:
2892 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2893 m->mdmreg[REG_SI2] = 199;
2894 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2895 break;
2896 case 38400:
2897 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2898 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2899 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2900 break;
2901 default:
2902 PARSE_ERROR1;
2903 }
2904 /* Switch off T.70 */
2905 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2906 /* Set Service 7 */
2907 m->mdmreg[REG_SI1] |= 4;
2908 break;
2909 case 'S':
2910 /* &S - Set Windowsize */
2911 p[0]++;
2912 i = isdn_getnum(p);
2913 if ((i > 0) && (i < 9))
2914 m->mdmreg[REG_WSIZE] = i;
2915 else
2916 PARSE_ERROR1;
2917 break;
2918 case 'V':
2919 /* &V - Show registers */
2920 p[0]++;
2921 isdn_tty_at_cout("\r\n", info);
2922 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2923 sprintf(rb, "S%02d=%03d%s", i,
2924 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2925 isdn_tty_at_cout(rb, info);
2926 }
2927 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2928 strlen(m->msn) ? m->msn : "None");
2929 isdn_tty_at_cout(rb, info);
2930 if (strlen(m->lmsn)) {
2931 isdn_tty_at_cout("\r\nListen: ", info);
2932 isdn_tty_at_cout(m->lmsn, info);
2933 isdn_tty_at_cout("\r\n", info);
2934 }
2935 break;
2936 case 'W':
2937 /* &W - Write Profile */
2938 p[0]++;
2939 switch (*p[0]) {
2940 case '0':
2941 p[0]++;
2942 modem_write_profile(m);
2943 break;
2944 default:
2945 PARSE_ERROR1;
2946 }
2947 break;
2948 case 'X':
2949 /* &X - Switch to BTX-Mode and T.70 */
2950 p[0]++;
2951 switch (isdn_getnum(p)) {
2952 case 0:
2953 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2954 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2955 break;
2956 case 1:
2957 m->mdmreg[REG_T70] |= BIT_T70;
2958 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2959 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2960 info->xmit_size = 112;
2961 m->mdmreg[REG_SI1] = 4;
2962 m->mdmreg[REG_SI2] = 0;
2963 break;
2964 case 2:
2965 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2966 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2967 info->xmit_size = 112;
2968 m->mdmreg[REG_SI1] = 4;
2969 m->mdmreg[REG_SI2] = 0;
2970 break;
2971 default:
2972 PARSE_ERROR1;
2973 }
2974 break;
2975 default:
2976 PARSE_ERROR1;
2977 }
2978 return 0;
2979 }
2980
2981 static int
2982 isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
2983 {
2984 /* Some plausibility checks */
2985 switch (mreg) {
2986 case REG_L2PROT:
2987 if (mval > ISDN_PROTO_L2_MAX)
2988 return 1;
2989 break;
2990 case REG_PSIZE:
2991 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2992 return 1;
2993 #ifdef CONFIG_ISDN_AUDIO
2994 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
2995 return 1;
2996 #endif
2997 info->xmit_size = mval * 16;
2998 switch (m->mdmreg[REG_L2PROT]) {
2999 case ISDN_PROTO_L2_V11096:
3000 case ISDN_PROTO_L2_V11019:
3001 case ISDN_PROTO_L2_V11038:
3002 info->xmit_size /= 10;
3003 }
3004 break;
3005 case REG_SI1I:
3006 case REG_PLAN:
3007 case REG_SCREEN:
3008 /* readonly registers */
3009 return 1;
3010 }
3011 return 0;
3012 }
3013
3014 /*
3015 * Perform ATS command
3016 */
3017 static int
3018 isdn_tty_cmd_ATS(char **p, modem_info * info)
3019 {
3020 atemu *m = &info->emu;
3021 int bitpos;
3022 int mreg;
3023 int mval;
3024 int bval;
3025
3026 mreg = isdn_getnum(p);
3027 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3028 PARSE_ERROR1;
3029 switch (*p[0]) {
3030 case '=':
3031 p[0]++;
3032 mval = isdn_getnum(p);
3033 if (mval < 0 || mval > 255)
3034 PARSE_ERROR1;
3035 if (isdn_tty_check_ats(mreg, mval, info, m))
3036 PARSE_ERROR1;
3037 m->mdmreg[mreg] = mval;
3038 break;
3039 case '.':
3040 /* Set/Clear a single bit */
3041 p[0]++;
3042 bitpos = isdn_getnum(p);
3043 if ((bitpos < 0) || (bitpos > 7))
3044 PARSE_ERROR1;
3045 switch (*p[0]) {
3046 case '=':
3047 p[0]++;
3048 bval = isdn_getnum(p);
3049 if (bval < 0 || bval > 1)
3050 PARSE_ERROR1;
3051 if (bval)
3052 mval = m->mdmreg[mreg] | (1 << bitpos);
3053 else
3054 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3055 if (isdn_tty_check_ats(mreg, mval, info, m))
3056 PARSE_ERROR1;
3057 m->mdmreg[mreg] = mval;
3058 break;
3059 case '?':
3060 p[0]++;
3061 isdn_tty_at_cout("\r\n", info);
3062 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3063 info);
3064 break;
3065 default:
3066 PARSE_ERROR1;
3067 }
3068 break;
3069 case '?':
3070 p[0]++;
3071 isdn_tty_show_profile(mreg, info);
3072 break;
3073 default:
3074 PARSE_ERROR1;
3075 break;
3076 }
3077 return 0;
3078 }
3079
3080 /*
3081 * Perform ATA command
3082 */
3083 static void
3084 isdn_tty_cmd_ATA(modem_info * info)
3085 {
3086 atemu *m = &info->emu;
3087 isdn_ctrl cmd;
3088 int l2;
3089
3090 if (info->msr & UART_MSR_RI) {
3091 /* Accept incoming call */
3092 info->last_dir = 0;
3093 strcpy(info->last_num, dev->num[info->drv_index]);
3094 m->mdmreg[REG_RINGCNT] = 0;
3095 info->msr &= ~UART_MSR_RI;
3096 l2 = m->mdmreg[REG_L2PROT];
3097 #ifdef CONFIG_ISDN_AUDIO
3098 /* If more than one bit set in reg18, autoselect Layer2 */
3099 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3100 if (m->mdmreg[REG_SI1I] == 1) {
3101 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3102 l2 = ISDN_PROTO_L2_TRANS;
3103 } else
3104 l2 = ISDN_PROTO_L2_X75I;
3105 }
3106 #endif
3107 cmd.driver = info->isdn_driver;
3108 cmd.command = ISDN_CMD_SETL2;
3109 cmd.arg = info->isdn_channel + (l2 << 8);
3110 info->last_l2 = l2;
3111 isdn_command(&cmd);
3112 cmd.driver = info->isdn_driver;
3113 cmd.command = ISDN_CMD_SETL3;
3114 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3115 #ifdef CONFIG_ISDN_TTY_FAX
3116 if (l2 == ISDN_PROTO_L2_FAX) {
3117 cmd.parm.fax = info->fax;
3118 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3119 }
3120 #endif
3121 isdn_command(&cmd);
3122 cmd.driver = info->isdn_driver;
3123 cmd.arg = info->isdn_channel;
3124 cmd.command = ISDN_CMD_ACCEPTD;
3125 info->dialing = 16;
3126 info->emu.carrierwait = 0;
3127 isdn_command(&cmd);
3128 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3129 } else
3130 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3131 }
3132
3133 #ifdef CONFIG_ISDN_AUDIO
3134 /*
3135 * Parse AT+F.. commands
3136 */
3137 static int
3138 isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3139 {
3140 atemu *m = &info->emu;
3141 char rs[20];
3142
3143 if (!strncmp(p[0], "CLASS", 5)) {
3144 p[0] += 5;
3145 switch (*p[0]) {
3146 case '?':
3147 p[0]++;
3148 sprintf(rs, "\r\n%d",
3149 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3150 #ifdef CONFIG_ISDN_TTY_FAX
3151 if (TTY_IS_FCLASS2(info))
3152 sprintf(rs, "\r\n2");
3153 else if (TTY_IS_FCLASS1(info))
3154 sprintf(rs, "\r\n1");
3155 #endif
3156 isdn_tty_at_cout(rs, info);
3157 break;
3158 case '=':
3159 p[0]++;
3160 switch (*p[0]) {
3161 case '0':
3162 p[0]++;
3163 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3164 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3165 m->mdmreg[REG_SI1] = 4;
3166 info->xmit_size =
3167 m->mdmreg[REG_PSIZE] * 16;
3168 break;
3169 #ifdef CONFIG_ISDN_TTY_FAX
3170 case '1':
3171 p[0]++;
3172 if (!(dev->global_features &
3173 ISDN_FEATURE_L3_FCLASS1))
3174 PARSE_ERROR1;
3175 m->mdmreg[REG_SI1] = 1;
3176 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3177 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3178 info->xmit_size =
3179 m->mdmreg[REG_PSIZE] * 16;
3180 break;
3181 case '2':
3182 p[0]++;
3183 if (!(dev->global_features &
3184 ISDN_FEATURE_L3_FCLASS2))
3185 PARSE_ERROR1;
3186 m->mdmreg[REG_SI1] = 1;
3187 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3188 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3189 info->xmit_size =
3190 m->mdmreg[REG_PSIZE] * 16;
3191 break;
3192 #endif
3193 case '8':
3194 p[0]++;
3195 /* L2 will change on dialout with si=1 */
3196 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3197 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3198 m->mdmreg[REG_SI1] = 5;
3199 info->xmit_size = VBUF;
3200 break;
3201 case '?':
3202 p[0]++;
3203 strcpy(rs, "\r\n0,");
3204 #ifdef CONFIG_ISDN_TTY_FAX
3205 if (dev->global_features &
3206 ISDN_FEATURE_L3_FCLASS1)
3207 strcat(rs, "1,");
3208 if (dev->global_features &
3209 ISDN_FEATURE_L3_FCLASS2)
3210 strcat(rs, "2,");
3211 #endif
3212 strcat(rs, "8");
3213 isdn_tty_at_cout(rs, info);
3214 break;
3215 default:
3216 PARSE_ERROR1;
3217 }
3218 break;
3219 default:
3220 PARSE_ERROR1;
3221 }
3222 return 0;
3223 }
3224 #ifdef CONFIG_ISDN_TTY_FAX
3225 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3226 #else
3227 PARSE_ERROR1;
3228 #endif
3229 }
3230
3231 /*
3232 * Parse AT+V.. commands
3233 */
3234 static int
3235 isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3236 {
3237 atemu *m = &info->emu;
3238 isdn_ctrl cmd;
3239 static char *vcmd[] =
3240 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3241 int i;
3242 int par1;
3243 int par2;
3244 char rs[20];
3245
3246 i = 0;
3247 while (vcmd[i]) {
3248 if (!strncmp(vcmd[i], p[0], 2)) {
3249 p[0] += 2;
3250 break;
3251 }
3252 i++;
3253 }
3254 switch (i) {
3255 case 0:
3256 /* AT+VNH - Auto hangup feature */
3257 switch (*p[0]) {
3258 case '?':
3259 p[0]++;
3260 isdn_tty_at_cout("\r\n1", info);
3261 break;
3262 case '=':
3263 p[0]++;
3264 switch (*p[0]) {
3265 case '1':
3266 p[0]++;
3267 break;
3268 case '?':
3269 p[0]++;
3270 isdn_tty_at_cout("\r\n1", info);
3271 break;
3272 default:
3273 PARSE_ERROR1;
3274 }
3275 break;
3276 default:
3277 PARSE_ERROR1;
3278 }
3279 break;
3280 case 1:
3281 /* AT+VIP - Reset all voice parameters */
3282 isdn_tty_modem_reset_vpar(m);
3283 break;
3284 case 2:
3285 /* AT+VLS - Select device, accept incoming call */
3286 switch (*p[0]) {
3287 case '?':
3288 p[0]++;
3289 sprintf(rs, "\r\n%d", m->vpar[0]);
3290 isdn_tty_at_cout(rs, info);
3291 break;
3292 case '=':
3293 p[0]++;
3294 switch (*p[0]) {
3295 case '0':
3296 p[0]++;
3297 m->vpar[0] = 0;
3298 break;
3299 case '2':
3300 p[0]++;
3301 m->vpar[0] = 2;
3302 break;
3303 case '?':
3304 p[0]++;
3305 isdn_tty_at_cout("\r\n0,2", info);
3306 break;
3307 default:
3308 PARSE_ERROR1;
3309 }
3310 break;
3311 default:
3312 PARSE_ERROR1;
3313 }
3314 break;
3315 case 3:
3316 /* AT+VRX - Start recording */
3317 if (!m->vpar[0])
3318 PARSE_ERROR1;
3319 if (info->online != 1) {
3320 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3321 return 1;
3322 }
3323 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3324 if (!info->dtmf_state) {
3325 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3326 PARSE_ERROR1;
3327 }
3328 info->silence_state = isdn_audio_silence_init(info->silence_state);
3329 if (!info->silence_state) {
3330 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3331 PARSE_ERROR1;
3332 }
3333 if (m->vpar[3] < 5) {
3334 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3335 if (!info->adpcmr) {
3336 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3337 PARSE_ERROR1;
3338 }
3339 }
3340 #ifdef ISDN_DEBUG_AT
3341 printk(KERN_DEBUG "AT: +VRX\n");
3342 #endif
3343 info->vonline |= 1;
3344 isdn_tty_modem_result(RESULT_CONNECT, info);
3345 return 0;
3346 break;
3347 case 4:
3348 /* AT+VSD - Silence detection */
3349 switch (*p[0]) {
3350 case '?':
3351 p[0]++;
3352 sprintf(rs, "\r\n<%d>,<%d>",
3353 m->vpar[1],
3354 m->vpar[2]);
3355 isdn_tty_at_cout(rs, info);
3356 break;
3357 case '=':
3358 p[0]++;
3359 if ((*p[0]>='0') && (*p[0]<='9')) {
3360 par1 = isdn_getnum(p);
3361 if ((par1 < 0) || (par1 > 31))
3362 PARSE_ERROR1;
3363 if (*p[0] != ',')
3364 PARSE_ERROR1;
3365 p[0]++;
3366 par2 = isdn_getnum(p);
3367 if ((par2 < 0) || (par2 > 255))
3368 PARSE_ERROR1;
3369 m->vpar[1] = par1;
3370 m->vpar[2] = par2;
3371 break;
3372 } else
3373 if (*p[0] == '?') {
3374 p[0]++;
3375 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3376 info);
3377 break;
3378 } else
3379 PARSE_ERROR1;
3380 break;
3381 default:
3382 PARSE_ERROR1;
3383 }
3384 break;
3385 case 5:
3386 /* AT+VSM - Select compression */
3387 switch (*p[0]) {
3388 case '?':
3389 p[0]++;
3390 sprintf(rs, "\r\n<%d>,<%d><8000>",
3391 m->vpar[3],
3392 m->vpar[1]);
3393 isdn_tty_at_cout(rs, info);
3394 break;
3395 case '=':
3396 p[0]++;
3397 switch (*p[0]) {
3398 case '2':
3399 case '3':
3400 case '4':
3401 case '5':
3402 case '6':
3403 par1 = isdn_getnum(p);
3404 if ((par1 < 2) || (par1 > 6))
3405 PARSE_ERROR1;
3406 m->vpar[3] = par1;
3407 break;
3408 case '?':
3409 p[0]++;
3410 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3411 info);
3412 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3413 info);
3414 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3415 info);
3416 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3417 info);
3418 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3419 info);
3420 break;
3421 default:
3422 PARSE_ERROR1;
3423 }
3424 break;
3425 default:
3426 PARSE_ERROR1;
3427 }
3428 break;
3429 case 6:
3430 /* AT+VTX - Start sending */
3431 if (!m->vpar[0])
3432 PARSE_ERROR1;
3433 if (info->online != 1) {
3434 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3435 return 1;
3436 }
3437 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3438 if (!info->dtmf_state) {
3439 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3440 PARSE_ERROR1;
3441 }
3442 if (m->vpar[3] < 5) {
3443 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3444 if (!info->adpcms) {
3445 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3446 PARSE_ERROR1;
3447 }
3448 }
3449 #ifdef ISDN_DEBUG_AT
3450 printk(KERN_DEBUG "AT: +VTX\n");
3451 #endif
3452 m->lastDLE = 0;
3453 info->vonline |= 2;
3454 isdn_tty_modem_result(RESULT_CONNECT, info);
3455 return 0;
3456 break;
3457 case 7:
3458 /* AT+VDD - DTMF detection */
3459 switch (*p[0]) {
3460 case '?':
3461 p[0]++;
3462 sprintf(rs, "\r\n<%d>,<%d>",
3463 m->vpar[4],
3464 m->vpar[5]);
3465 isdn_tty_at_cout(rs, info);
3466 break;
3467 case '=':
3468 p[0]++;
3469 if ((*p[0]>='0') && (*p[0]<='9')) {
3470 if (info->online != 1)
3471 PARSE_ERROR1;
3472 par1 = isdn_getnum(p);
3473 if ((par1 < 0) || (par1 > 15))
3474 PARSE_ERROR1;
3475 if (*p[0] != ',')
3476 PARSE_ERROR1;
3477 p[0]++;
3478 par2 = isdn_getnum(p);
3479 if ((par2 < 0) || (par2 > 255))
3480 PARSE_ERROR1;
3481 m->vpar[4] = par1;
3482 m->vpar[5] = par2;
3483 cmd.driver = info->isdn_driver;
3484 cmd.command = ISDN_CMD_AUDIO;
3485 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3486 cmd.parm.num[0] = par1;
3487 cmd.parm.num[1] = par2;
3488 isdn_command(&cmd);
3489 break;
3490 } else
3491 if (*p[0] == '?') {
3492 p[0]++;
3493 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3494 info);
3495 break;
3496 } else
3497 PARSE_ERROR1;
3498 break;
3499 default:
3500 PARSE_ERROR1;
3501 }
3502 break;
3503 default:
3504 PARSE_ERROR1;
3505 }
3506 return 0;
3507 }
3508 #endif /* CONFIG_ISDN_AUDIO */
3509
3510 /*
3511 * Parse and perform an AT-command-line.
3512 */
3513 static void
3514 isdn_tty_parse_at(modem_info * info)
3515 {
3516 atemu *m = &info->emu;
3517 char *p;
3518 char ds[ISDN_MSNLEN];
3519
3520 #ifdef ISDN_DEBUG_AT
3521 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3522 #endif
3523 for (p = &m->mdmcmd[2]; *p;) {
3524 switch (*p) {
3525 case ' ':
3526 p++;
3527 break;
3528 case 'A':
3529 /* A - Accept incoming call */
3530 p++;
3531 isdn_tty_cmd_ATA(info);
3532 return;
3533 break;
3534 case 'D':
3535 /* D - Dial */
3536 if (info->msr & UART_MSR_DCD)
3537 PARSE_ERROR;
3538 if (info->msr & UART_MSR_RI) {
3539 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3540 return;
3541 }
3542 isdn_tty_getdial(++p, ds, sizeof ds);
3543 p += strlen(p);
3544 if (!strlen(m->msn))
3545 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3546 else if (strlen(ds))
3547 isdn_tty_dial(ds, info, m);
3548 else
3549 PARSE_ERROR;
3550 return;
3551 case 'E':
3552 /* E - Turn Echo on/off */
3553 p++;
3554 switch (isdn_getnum(&p)) {
3555 case 0:
3556 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3557 break;
3558 case 1:
3559 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3560 break;
3561 default:
3562 PARSE_ERROR;
3563 }
3564 break;
3565 case 'H':
3566 /* H - On/Off-hook */
3567 p++;
3568 switch (*p) {
3569 case '0':
3570 p++;
3571 isdn_tty_on_hook(info);
3572 break;
3573 case '1':
3574 p++;
3575 isdn_tty_off_hook();
3576 break;
3577 default:
3578 isdn_tty_on_hook(info);
3579 break;
3580 }
3581 break;
3582 case 'I':
3583 /* I - Information */
3584 p++;
3585 isdn_tty_at_cout("\r\nLinux ISDN", info);
3586 switch (*p) {
3587 case '0':
3588 case '1':
3589 p++;
3590 break;
3591 case '2':
3592 p++;
3593 isdn_tty_report(info);
3594 break;
3595 case '3':
3596 p++;
3597 snprintf(ds, sizeof(ds), "\r\n%d", info->emu.charge);
3598 isdn_tty_at_cout(ds, info);
3599 break;
3600 default:;
3601 }
3602 break;
3603 #ifdef DUMMY_HAYES_AT
3604 case 'L':
3605 case 'M':
3606 /* only for be compilant with common scripts */
3607 /* no function */
3608 p++;
3609 isdn_getnum(&p);
3610 break;
3611 #endif
3612 case 'O':
3613 /* O - Go online */
3614 p++;
3615 if (info->msr & UART_MSR_DCD)
3616 /* if B-Channel is up */
3617 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3618 else
3619 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3620 return;
3621 case 'Q':
3622 /* Q - Turn Emulator messages on/off */
3623 p++;
3624 switch (isdn_getnum(&p)) {
3625 case 0:
3626 m->mdmreg[REG_RESP] |= BIT_RESP;
3627 break;
3628 case 1:
3629 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3630 break;
3631 default:
3632 PARSE_ERROR;
3633 }
3634 break;
3635 case 'S':
3636 /* S - Set/Get Register */
3637 p++;
3638 if (isdn_tty_cmd_ATS(&p, info))
3639 return;
3640 break;
3641 case 'V':
3642 /* V - Numeric or ASCII Emulator-messages */
3643 p++;
3644 switch (isdn_getnum(&p)) {
3645 case 0:
3646 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3647 break;
3648 case 1:
3649 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3650 break;
3651 default:
3652 PARSE_ERROR;
3653 }
3654 break;
3655 case 'Z':
3656 /* Z - Load Registers from Profile */
3657 p++;
3658 if (info->msr & UART_MSR_DCD) {
3659 info->online = 0;
3660 isdn_tty_on_hook(info);
3661 }
3662 isdn_tty_modem_reset_regs(info, 1);
3663 break;
3664 case '+':
3665 p++;
3666 switch (*p) {
3667 #ifdef CONFIG_ISDN_AUDIO
3668 case 'F':
3669 p++;
3670 if (isdn_tty_cmd_PLUSF(&p, info))
3671 return;
3672 break;
3673 case 'V':
3674 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3675 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3676 PARSE_ERROR;
3677 p++;
3678 if (isdn_tty_cmd_PLUSV(&p, info))
3679 return;
3680 break;
3681 #endif /* CONFIG_ISDN_AUDIO */
3682 case 'S': /* SUSPEND */
3683 p++;
3684 isdn_tty_get_msnstr(ds, &p);
3685 isdn_tty_suspend(ds, info, m);
3686 break;
3687 case 'R': /* RESUME */
3688 p++;
3689 isdn_tty_get_msnstr(ds, &p);
3690 isdn_tty_resume(ds, info, m);
3691 break;
3692 case 'M': /* MESSAGE */
3693 p++;
3694 isdn_tty_send_msg(info, m, p);
3695 break;
3696 default:
3697 PARSE_ERROR;
3698 }
3699 break;
3700 case '&':
3701 p++;
3702 if (isdn_tty_cmd_ATand(&p, info))
3703 return;
3704 break;
3705 default:
3706 PARSE_ERROR;
3707 }
3708 }
3709 #ifdef CONFIG_ISDN_AUDIO
3710 if (!info->vonline)
3711 #endif
3712 isdn_tty_modem_result(RESULT_OK, info);
3713 }
3714
3715 /* Need own toupper() because standard-toupper is not available
3716 * within modules.
3717 */
3718 #define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3719
3720 /*
3721 * Perform line-editing of AT-commands
3722 *
3723 * Parameters:
3724 * p inputbuffer
3725 * count length of buffer
3726 * channel index to line (minor-device)
3727 */
3728 static int
3729 isdn_tty_edit_at(const char *p, int count, modem_info * info)
3730 {
3731 atemu *m = &info->emu;
3732 int total = 0;
3733 u_char c;
3734 char eb[2];
3735 int cnt;
3736
3737 for (cnt = count; cnt > 0; p++, cnt--) {
3738 c = *p;
3739 total++;
3740 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3741 /* Separator (CR or LF) */
3742 m->mdmcmd[m->mdmcmdl] = 0;
3743 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3744 eb[0] = c;
3745 eb[1] = 0;
3746 isdn_tty_at_cout(eb, info);
3747 }
3748 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3749 isdn_tty_parse_at(info);
3750 m->mdmcmdl = 0;
3751 continue;
3752 }
3753 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3754 /* Backspace-Function */
3755 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3756 if (m->mdmcmdl)
3757 m->mdmcmdl--;
3758 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3759 isdn_tty_at_cout("\b", info);
3760 }
3761 continue;
3762 }
3763 if (cmdchar(c)) {
3764 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3765 eb[0] = c;
3766 eb[1] = 0;
3767 isdn_tty_at_cout(eb, info);
3768 }
3769 if (m->mdmcmdl < 255) {
3770 c = my_toupper(c);
3771 switch (m->mdmcmdl) {
3772 case 1:
3773 if (c == 'T') {
3774 m->mdmcmd[m->mdmcmdl] = c;
3775 m->mdmcmd[++m->mdmcmdl] = 0;
3776 break;
3777 } else
3778 m->mdmcmdl = 0;
3779 /* Fall through, check for 'A' */
3780 case 0:
3781 if (c == 'A') {
3782 m->mdmcmd[m->mdmcmdl] = c;
3783 m->mdmcmd[++m->mdmcmdl] = 0;
3784 }
3785 break;
3786 default:
3787 m->mdmcmd[m->mdmcmdl] = c;
3788 m->mdmcmd[++m->mdmcmdl] = 0;
3789 }
3790 }
3791 }
3792 }
3793 return total;
3794 }
3795
3796 /*
3797 * Switch all modem-channels who are online and got a valid
3798 * escape-sequence 1.5 seconds ago, to command-mode.
3799 * This function is called every second via timer-interrupt from within
3800 * timer-dispatcher isdn_timer_function()
3801 */
3802 void
3803 isdn_tty_modem_escape(void)
3804 {
3805 int ton = 0;
3806 int i;
3807 int midx;
3808
3809 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3810 if (USG_MODEM(dev->usage[i]))
3811 if ((midx = dev->m_idx[i]) >= 0) {
3812 modem_info *info = &dev->mdm.info[midx];
3813 if (info->online) {
3814 ton = 1;
3815 if ((info->emu.pluscount == 3) &&
3816 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3817 info->emu.pluscount = 0;
3818 info->online = 0;
3819 isdn_tty_modem_result(RESULT_OK, info);
3820 }
3821 }
3822 }
3823 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3824 }
3825
3826 /*
3827 * Put a RING-message to all modem-channels who have the RI-bit set.
3828 * This function is called every second via timer-interrupt from within
3829 * timer-dispatcher isdn_timer_function()
3830 */
3831 void
3832 isdn_tty_modem_ring(void)
3833 {
3834 int ton = 0;
3835 int i;
3836
3837 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3838 modem_info *info = &dev->mdm.info[i];
3839 if (info->msr & UART_MSR_RI) {
3840 ton = 1;
3841 isdn_tty_modem_result(RESULT_RING, info);
3842 }
3843 }
3844 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3845 }
3846
3847 /*
3848 * For all online tty's, try sending data to
3849 * the lower levels.
3850 */
3851 void
3852 isdn_tty_modem_xmit(void)
3853 {
3854 int ton = 1;
3855 int i;
3856
3857 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3858 modem_info *info = &dev->mdm.info[i];
3859 if (info->online) {
3860 ton = 1;
3861 isdn_tty_senddown(info);
3862 isdn_tty_tint(info);
3863 }
3864 }
3865 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3866 }
3867
3868 /*
3869 * Check all channels if we have a 'no carrier' timeout.
3870 * Timeout value is set by Register S7.
3871 */
3872 void
3873 isdn_tty_carrier_timeout(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->dialing) {
3881 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3882 info->dialing = 0;
3883 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3884 isdn_tty_modem_hup(info, 1);
3885 }
3886 else
3887 ton = 1;
3888 }
3889 }
3890 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3891 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree