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[ISDN] i4l: 'NO CARRIER' message lost after ldisc flush
[linux-2.6-block.git] / drivers / isdn / i4l / isdn_tty.c
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1da177e4
LT		 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
1da177e4
LT		 14#include <linux/isdn.h>
15#include <linux/delay.h>
16#include "isdn_common.h"
17#include "isdn_tty.h"
18#ifdef CONFIG_ISDN_AUDIO
19#include "isdn_audio.h"
20#define VBUF 0x3e0
21#define VBUFX (VBUF/16)
22#endif
23
24#define FIX_FILE_TRANSFER
25#define DUMMY_HAYES_AT
26
27/* Prototypes */
28
29static int isdn_tty_edit_at(const char *, int, modem_info *);
30static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
31static void isdn_tty_modem_reset_regs(modem_info *, int);
32static void isdn_tty_cmd_ATA(modem_info *);
33static void isdn_tty_flush_buffer(struct tty_struct *);
34static void isdn_tty_modem_result(int, modem_info *);
35#ifdef CONFIG_ISDN_AUDIO
36static int isdn_tty_countDLE(unsigned char *, int);
37#endif
38
39/* Leave this unchanged unless you know what you do! */
40#define MODEM_PARANOIA_CHECK
41#define MODEM_DO_RESTART
42
43static int bit2si[8] =
44{1, 5, 7, 7, 7, 7, 7, 7};
45static int si2bit[8] =
46{4, 1, 4, 4, 4, 4, 4, 4};
47
48char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
49
50
51/* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
52 * to stuff incoming data directly into a tty's flip-buffer. This
53 * is done to speed up tty-receiving if the receive-queue is empty.
54 * This routine MUST be called with interrupts off.
55 * Return:
56 * 1 = Success
57 * 0 = Failure, data has to be buffered and later processed by
58 * isdn_tty_readmodem().
59 */
60static int
61isdn_tty_try_read(modem_info * info, struct sk_buff *skb)
62{
63 int c;
64 int len;
65 struct tty_struct *tty;
33f0f88f 66 char last;
1da177e4
LT		 67
68 if (info->online) {
69 if ((tty = info->tty)) {
70 if (info->mcr & UART_MCR_RTS) {
1da177e4
LT		 71 len = skb->len
72#ifdef CONFIG_ISDN_AUDIO
73 + ISDN_AUDIO_SKB_DLECOUNT(skb)
74#endif
75 ;
33f0f88f
AC		 76
77 c = tty_buffer_request_room(tty, len);
1da177e4
LT		 78 if (c >= len) {
79#ifdef CONFIG_ISDN_AUDIO
33f0f88f
AC		 80 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
81 int l = skb->len;
82 unsigned char *dp = skb->data;
83 while (--l) {
ca6f8792 84 if (*dp == DLE)
1da177e4 85 tty_insert_flip_char(tty, DLE, 0);
33f0f88f
AC		 86 tty_insert_flip_char(tty, *dp++, 0);
87 }
88 last = *dp;
1da177e4
LT		 89 } else {
90#endif
33f0f88f
AC		 91 if(len > 1)
92 tty_insert_flip_string(tty, skb->data, len - 1);
93 last = skb->data[len - 1];
1da177e4
LT		 94#ifdef CONFIG_ISDN_AUDIO
95 }
96#endif
97 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
33f0f88f
AC		 98 tty_insert_flip_char(tty, last, 0xFF);
99 else
100 tty_insert_flip_char(tty, last, TTY_NORMAL);
101 tty_flip_buffer_push(tty);
1da177e4
LT		 102 kfree_skb(skb);
103 return 1;
104 }
105 }
106 }
107 }
108 return 0;
109}
110
111/* isdn_tty_readmodem() is called periodically from within timer-interrupt.
112 * It tries getting received data from the receive queue an stuff it into
113 * the tty's flip-buffer.
114 */
115void
116isdn_tty_readmodem(void)
117{
118 int resched = 0;
119 int midx;
120 int i;
1da177e4
LT		 121 int r;
122 struct tty_struct *tty;
123 modem_info *info;
124
125 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
126 if ((midx = dev->m_idx[i]) >= 0) {
127 info = &dev->mdm.info[midx];
128 if (info->online) {
129 r = 0;
130#ifdef CONFIG_ISDN_AUDIO
131 isdn_audio_eval_dtmf(info);
132 if ((info->vonline & 1) && (info->emu.vpar[1]))
133 isdn_audio_eval_silence(info);
134#endif
135 if ((tty = info->tty)) {
136 if (info->mcr & UART_MCR_RTS) {
33f0f88f
AC		 137 /* CISCO AsyncPPP Hack */
138 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
139 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
140 else
141 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
142 if (r)
143 tty_flip_buffer_push(tty);
1da177e4
LT		 144 } else
145 r = 1;
146 } else
147 r = 1;
148 if (r) {
149 info->rcvsched = 0;
150 resched = 1;
151 } else
152 info->rcvsched = 1;
153 }
154 }
155 }
156 if (!resched)
157 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
158}
159
160int
161isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
162{
163 ulong flags;
164 int midx;
165#ifdef CONFIG_ISDN_AUDIO
166 int ifmt;
167#endif
168 modem_info *info;
169
170 if ((midx = dev->m_idx[i]) < 0) {
171 /* if midx is invalid, packet is not for tty */
172 return 0;
173 }
174 info = &dev->mdm.info[midx];
175#ifdef CONFIG_ISDN_AUDIO
176 ifmt = 1;
177
178 if ((info->vonline) && (!info->emu.vpar[4]))
179 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
180 if ((info->vonline & 1) && (info->emu.vpar[1]))
181 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
182#endif
183 if ((info->online < 2)
184#ifdef CONFIG_ISDN_AUDIO
185 && (!(info->vonline & 1))
186#endif
187 ) {
188 /* If Modem not listening, drop data */
189 kfree_skb(skb);
190 return 1;
191 }
192 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
193 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
194 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
195 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
196 skb_pull(skb, 4);
197 else
198 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
199 skb_pull(skb, 2);
200 } else
201 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
202 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
203 skb_pull(skb, 4);
204 }
205#ifdef CONFIG_ISDN_AUDIO
206 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
207 ISDN_AUDIO_SKB_LOCK(skb) = 0;
208 if (info->vonline & 1) {
209 /* voice conversion/compression */
210 switch (info->emu.vpar[3]) {
211 case 2:
212 case 3:
213 case 4:
214 /* adpcm
215 * Since compressed data takes less
216 * space, we can overwrite the buffer.
217 */
218 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
219 ifmt,
220 skb->data,
221 skb->data,
222 skb->len));
223 break;
224 case 5:
225 /* a-law */
226 if (!ifmt)
227 isdn_audio_ulaw2alaw(skb->data, skb->len);
228 break;
229 case 6:
230 /* u-law */
231 if (ifmt)
232 isdn_audio_alaw2ulaw(skb->data, skb->len);
233 break;
234 }
235 ISDN_AUDIO_SKB_DLECOUNT(skb) =
236 isdn_tty_countDLE(skb->data, skb->len);
237 }
238#ifdef CONFIG_ISDN_TTY_FAX
239 else {
240 if (info->faxonline & 2) {
241 isdn_tty_fax_bitorder(info, skb);
242 ISDN_AUDIO_SKB_DLECOUNT(skb) =
243 isdn_tty_countDLE(skb->data, skb->len);
244 }
245 }
246#endif
247#endif
33f0f88f 248 /* Try to deliver directly via tty-buf if queue is empty */
1da177e4
LT		 249 spin_lock_irqsave(&info->readlock, flags);
250 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
251 if (isdn_tty_try_read(info, skb)) {
252 spin_unlock_irqrestore(&info->readlock, flags);
253 return 1;
254 }
255 /* Direct deliver failed or queue wasn't empty.
256 * Queue up for later dequeueing via timer-irq.
257 */
258 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
259 dev->drv[di]->rcvcount[channel] +=
260 (skb->len
261#ifdef CONFIG_ISDN_AUDIO
262 + ISDN_AUDIO_SKB_DLECOUNT(skb)
263#endif
264 );
265 spin_unlock_irqrestore(&info->readlock, flags);
266 /* Schedule dequeuing */
267 if ((dev->modempoll) && (info->rcvsched))
268 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
269 return 1;
270}
271
3e206b0a 272static void
1da177e4
LT		 273isdn_tty_cleanup_xmit(modem_info * info)
274{
275 skb_queue_purge(&info->xmit_queue);
276#ifdef CONFIG_ISDN_AUDIO
277 skb_queue_purge(&info->dtmf_queue);
278#endif
279}
280
281static void
282isdn_tty_tint(modem_info * info)
283{
284 struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
285 int len, slen;
286
287 if (!skb)
288 return;
289 len = skb->len;
290 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
291 info->isdn_channel, 1, skb)) == len) {
292 struct tty_struct *tty = info->tty;
293 info->send_outstanding++;
294 info->msr &= ~UART_MSR_CTS;
295 info->lsr &= ~UART_LSR_TEMT;
296 tty_wakeup(tty);
297 return;
298 }
299 if (slen < 0) {
300 /* Error: no channel, already shutdown, or wrong parameter */
301 dev_kfree_skb(skb);
302 return;
303 }
304 skb_queue_head(&info->xmit_queue, skb);
305}
306
307#ifdef CONFIG_ISDN_AUDIO
308static int
309isdn_tty_countDLE(unsigned char *buf, int len)
310{
311 int count = 0;
312
313 while (len--)
314 if (*buf++ == DLE)
315 count++;
316 return count;
317}
318
319/* This routine is called from within isdn_tty_write() to perform
320 * DLE-decoding when sending audio-data.
321 */
322static int
323isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
324{
325 unsigned char *p = &info->xmit_buf[info->xmit_count];
326 int count = 0;
327
328 while (len > 0) {
329 if (m->lastDLE) {
330 m->lastDLE = 0;
331 switch (*p) {
332 case DLE:
333 /* Escape code */
334 if (len > 1)
335 memmove(p, p + 1, len - 1);
336 p--;
337 count++;
338 break;
339 case ETX:
340 /* End of data */
341 info->vonline |= 4;
342 return count;
343 case DC4:
344 /* Abort RX */
345 info->vonline &= ~1;
346#ifdef ISDN_DEBUG_MODEM_VOICE
347 printk(KERN_DEBUG
348 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
349 info->line);
350#endif
351 isdn_tty_at_cout("\020\003", info);
352 if (!info->vonline) {
353#ifdef ISDN_DEBUG_MODEM_VOICE
354 printk(KERN_DEBUG
355 "DLEdown: send VCON on ttyI%d\n",
356 info->line);
357#endif
358 isdn_tty_at_cout("\r\nVCON\r\n", info);
359 }
360 /* Fall through */
361 case 'q':
362 case 's':
363 /* Silence */
364 if (len > 1)
365 memmove(p, p + 1, len - 1);
366 p--;
367 break;
368 }
369 } else {
370 if (*p == DLE)
371 m->lastDLE = 1;
372 else
373 count++;
374 }
375 p++;
376 len--;
377 }
378 if (len < 0) {
379 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
380 return 0;
381 }
382 return count;
383}
384
385/* This routine is called from within isdn_tty_write() when receiving
386 * audio-data. It interrupts receiving, if an character other than
387 * ^S or ^Q is sent.
388 */
389static int
390isdn_tty_end_vrx(const char *buf, int c)
391{
392 char ch;
393
394 while (c--) {
395 ch = *buf;
396 if ((ch != 0x11) && (ch != 0x13))
397 return 1;
398 buf++;
399 }
400 return 0;
401}
402
403static int voice_cf[7] =
404{0, 0, 4, 3, 2, 0, 0};
405
406#endif /* CONFIG_ISDN_AUDIO */
407
408/* isdn_tty_senddown() is called either directly from within isdn_tty_write()
409 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
410 * outgoing data from the tty's xmit-buffer, handles voice-decompression or
411 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
412 */
413static void
414isdn_tty_senddown(modem_info * info)
415{
416 int buflen;
417 int skb_res;
418#ifdef CONFIG_ISDN_AUDIO
419 int audio_len;
420#endif
421 struct sk_buff *skb;
422
423#ifdef CONFIG_ISDN_AUDIO
424 if (info->vonline & 4) {
425 info->vonline &= ~6;
426 if (!info->vonline) {
427#ifdef ISDN_DEBUG_MODEM_VOICE
428 printk(KERN_DEBUG
429 "senddown: send VCON on ttyI%d\n",
430 info->line);
431#endif
432 isdn_tty_at_cout("\r\nVCON\r\n", info);
433 }
434 }
435#endif
436 if (!(buflen = info->xmit_count))
437 return;
438 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
439 info->msr &= ~UART_MSR_CTS;
440 info->lsr &= ~UART_LSR_TEMT;
441 /* info->xmit_count is modified here and in isdn_tty_write().
442 * So we return here if isdn_tty_write() is in the
443 * critical section.
444 */
445 atomic_inc(&info->xmit_lock);
446 if (!(atomic_dec_and_test(&info->xmit_lock)))
447 return;
448 if (info->isdn_driver < 0) {
449 info->xmit_count = 0;
450 return;
451 }
452 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
453#ifdef CONFIG_ISDN_AUDIO
454 if (info->vonline & 2)
455 audio_len = buflen * voice_cf[info->emu.vpar[3]];
456 else
457 audio_len = 0;
458 skb = dev_alloc_skb(skb_res + buflen + audio_len);
459#else
460 skb = dev_alloc_skb(skb_res + buflen);
461#endif
462 if (!skb) {
463 printk(KERN_WARNING
464 "isdn_tty: Out of memory in ttyI%d senddown\n",
465 info->line);
466 return;
467 }
468 skb_reserve(skb, skb_res);
469 memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
470 info->xmit_count = 0;
471#ifdef CONFIG_ISDN_AUDIO
472 if (info->vonline & 2) {
473 /* For now, ifmt is fixed to 1 (alaw), since this
474 * is used with ISDN everywhere in the world, except
475 * US, Canada and Japan.
476 * Later, when US-ISDN protocols are implemented,
477 * this setting will depend on the D-channel protocol.
478 */
479 int ifmt = 1;
480
481 /* voice conversion/decompression */
482 switch (info->emu.vpar[3]) {
483 case 2:
484 case 3:
485 case 4:
486 /* adpcm, compatible to ZyXel 1496 modem
487 * with ROM revision 6.01
488 */
489 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
490 ifmt,
491 skb->data,
492 skb_put(skb, audio_len),
493 buflen);
494 skb_pull(skb, buflen);
495 skb_trim(skb, audio_len);
496 break;
497 case 5:
498 /* a-law */
499 if (!ifmt)
500 isdn_audio_alaw2ulaw(skb->data,
501 buflen);
502 break;
503 case 6:
504 /* u-law */
505 if (ifmt)
506 isdn_audio_ulaw2alaw(skb->data,
507 buflen);
508 break;
509 }
510 }
511#endif /* CONFIG_ISDN_AUDIO */
512 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
513 /* Add T.70 simplified header */
514 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
515 memcpy(skb_push(skb, 2), "\1\0", 2);
516 else
517 memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
518 }
519 skb_queue_tail(&info->xmit_queue, skb);
520}
521
522/************************************************************
523 *
524 * Modem-functions
525 *
526 * mostly "stolen" from original Linux-serial.c and friends.
527 *
528 ************************************************************/
529
530/* The next routine is called once from within timer-interrupt
531 * triggered within isdn_tty_modem_ncarrier(). It calls
532 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
33f0f88f 533 * into the tty's buffer.
1da177e4
LT		 534 */
535static void
536isdn_tty_modem_do_ncarrier(unsigned long data)
537{
538 modem_info *info = (modem_info *) data;
539 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
540}
541
542/* Next routine is called, whenever the DTR-signal is raised.
543 * It checks the ncarrier-flag, and triggers the above routine
544 * when necessary. The ncarrier-flag is set, whenever DTR goes
545 * low.
546 */
547static void
548isdn_tty_modem_ncarrier(modem_info * info)
549{
550 if (info->ncarrier) {
551 info->nc_timer.expires = jiffies + HZ;
552 add_timer(&info->nc_timer);
553 }
554}
555
556/*
557 * return the usage calculated by si and layer 2 protocol
558 */
3e206b0a 559static int
1da177e4
LT		 560isdn_calc_usage(int si, int l2)
561{
562 int usg = ISDN_USAGE_MODEM;
563
564#ifdef CONFIG_ISDN_AUDIO
565 if (si == 1) {
566 switch(l2) {
567 case ISDN_PROTO_L2_MODEM:
568 usg = ISDN_USAGE_MODEM;
569 break;
570#ifdef CONFIG_ISDN_TTY_FAX
571 case ISDN_PROTO_L2_FAX:
572 usg = ISDN_USAGE_FAX;
573 break;
574#endif
575 case ISDN_PROTO_L2_TRANS:
576 default:
577 usg = ISDN_USAGE_VOICE;
578 break;
579 }
580 }
581#endif
582 return(usg);
583}
584
585/* isdn_tty_dial() performs dialing of a tty an the necessary
586 * setup of the lower levels before that.
587 */
588static void
589isdn_tty_dial(char *n, modem_info * info, atemu * m)
590{
591 int usg = ISDN_USAGE_MODEM;
592 int si = 7;
593 int l2 = m->mdmreg[REG_L2PROT];
594 u_long flags;
595 isdn_ctrl cmd;
596 int i;
597 int j;
598
599 for (j = 7; j >= 0; j--)
600 if (m->mdmreg[REG_SI1] & (1 << j)) {
601 si = bit2si[j];
602 break;
603 }
604 usg = isdn_calc_usage(si, l2);
605#ifdef CONFIG_ISDN_AUDIO
606 if ((si == 1) &&
607 (l2 != ISDN_PROTO_L2_MODEM)
608#ifdef CONFIG_ISDN_TTY_FAX
609 && (l2 != ISDN_PROTO_L2_FAX)
610#endif
611 ) {
612 l2 = ISDN_PROTO_L2_TRANS;
613 usg = ISDN_USAGE_VOICE;
614 }
615#endif
616 m->mdmreg[REG_SI1I] = si2bit[si];
617 spin_lock_irqsave(&dev->lock, flags);
618 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
619 if (i < 0) {
620 spin_unlock_irqrestore(&dev->lock, flags);
621 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
622 } else {
623 info->isdn_driver = dev->drvmap[i];
624 info->isdn_channel = dev->chanmap[i];
625 info->drv_index = i;
626 dev->m_idx[i] = info->line;
627 dev->usage[i] |= ISDN_USAGE_OUTGOING;
628 info->last_dir = 1;
629 strcpy(info->last_num, n);
630 isdn_info_update();
631 spin_unlock_irqrestore(&dev->lock, flags);
632 cmd.driver = info->isdn_driver;
633 cmd.arg = info->isdn_channel;
634 cmd.command = ISDN_CMD_CLREAZ;
635 isdn_command(&cmd);
636 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
637 cmd.driver = info->isdn_driver;
638 cmd.command = ISDN_CMD_SETEAZ;
639 isdn_command(&cmd);
640 cmd.driver = info->isdn_driver;
641 cmd.command = ISDN_CMD_SETL2;
642 info->last_l2 = l2;
643 cmd.arg = info->isdn_channel + (l2 << 8);
644 isdn_command(&cmd);
645 cmd.driver = info->isdn_driver;
646 cmd.command = ISDN_CMD_SETL3;
647 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
648#ifdef CONFIG_ISDN_TTY_FAX
649 if (l2 == ISDN_PROTO_L2_FAX) {
650 cmd.parm.fax = info->fax;
651 info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
652 }
653#endif
654 isdn_command(&cmd);
655 cmd.driver = info->isdn_driver;
656 cmd.arg = info->isdn_channel;
657 sprintf(cmd.parm.setup.phone, "%s", n);
658 sprintf(cmd.parm.setup.eazmsn, "%s",
659 isdn_map_eaz2msn(m->msn, info->isdn_driver));
660 cmd.parm.setup.si1 = si;
661 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
662 cmd.command = ISDN_CMD_DIAL;
663 info->dialing = 1;
664 info->emu.carrierwait = 0;
665 strcpy(dev->num[i], n);
666 isdn_info_update();
667 isdn_command(&cmd);
668 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
669 }
670}
671
672/* isdn_tty_hangup() disassociates a tty from the real
673 * ISDN-line (hangup). The usage-status is cleared
674 * and some cleanup is done also.
675 */
676void
677isdn_tty_modem_hup(modem_info * info, int local)
678{
679 isdn_ctrl cmd;
680 int di, ch;
681
682 if (!info)
683 return;
684
685 di = info->isdn_driver;
686 ch = info->isdn_channel;
687 if (di < 0 || ch < 0)
688 return;
689
690 info->isdn_driver = -1;
691 info->isdn_channel = -1;
692
693#ifdef ISDN_DEBUG_MODEM_HUP
694 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
695#endif
696 info->rcvsched = 0;
697 isdn_tty_flush_buffer(info->tty);
698 if (info->online) {
699 info->last_lhup = local;
700 info->online = 0;
701 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
702 }
703#ifdef CONFIG_ISDN_AUDIO
704 info->vonline = 0;
705#ifdef CONFIG_ISDN_TTY_FAX
706 info->faxonline = 0;
707 info->fax->phase = ISDN_FAX_PHASE_IDLE;
708#endif
709 info->emu.vpar[4] = 0;
710 info->emu.vpar[5] = 8;
3c7208f2
JJ		 711 kfree(info->dtmf_state);
712 info->dtmf_state = NULL;
713 kfree(info->silence_state);
714 info->silence_state = NULL;
715 kfree(info->adpcms);
716 info->adpcms = NULL;
717 kfree(info->adpcmr);
718 info->adpcmr = NULL;
1da177e4
LT		 719#endif
720 if ((info->msr & UART_MSR_RI) &&
721 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
722 isdn_tty_modem_result(RESULT_RUNG, info);
723 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
724 info->lsr |= UART_LSR_TEMT;
725
726 if (local) {
727 cmd.driver = di;
728 cmd.command = ISDN_CMD_HANGUP;
729 cmd.arg = ch;
730 isdn_command(&cmd);
731 }
732
733 isdn_all_eaz(di, ch);
734 info->emu.mdmreg[REG_RINGCNT] = 0;
735 isdn_free_channel(di, ch, 0);
736
737 if (info->drv_index >= 0) {
738 dev->m_idx[info->drv_index] = -1;
739 info->drv_index = -1;
740 }
741}
742
743/*
744 * Begin of a CAPI like interface, currently used only for
745 * supplementary service (CAPI 2.0 part III)
746 */
747#include <linux/isdn/capicmd.h>
748
749int
750isdn_tty_capi_facility(capi_msg *cm) {
751 return(-1); /* dummy */
752}
753
754/* isdn_tty_suspend() tries to suspend the current tty connection
755 */
756static void
757isdn_tty_suspend(char *id, modem_info * info, atemu * m)
758{
759 isdn_ctrl cmd;
760
761 int l;
762
763 if (!info)
764 return;
765
766#ifdef ISDN_DEBUG_MODEM_SERVICES
767 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
768#endif
769 l = strlen(id);
770 if ((info->isdn_driver >= 0)) {
771 cmd.parm.cmsg.Length = l+18;
772 cmd.parm.cmsg.Command = CAPI_FACILITY;
773 cmd.parm.cmsg.Subcommand = CAPI_REQ;
774 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
775 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
776 cmd.parm.cmsg.para[1] = 0;
777 cmd.parm.cmsg.para[2] = l + 3;
778 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
779 cmd.parm.cmsg.para[4] = 0;
780 cmd.parm.cmsg.para[5] = l;
781 strncpy(&cmd.parm.cmsg.para[6], id, l);
782 cmd.command = CAPI_PUT_MESSAGE;
783 cmd.driver = info->isdn_driver;
784 cmd.arg = info->isdn_channel;
785 isdn_command(&cmd);
786 }
787}
788
789/* isdn_tty_resume() tries to resume a suspended call
790 * setup of the lower levels before that. unfortunatly here is no
791 * checking for compatibility of used protocols implemented by Q931
792 * It does the same things like isdn_tty_dial, the last command
793 * is different, may be we can merge it.
794 */
795
796static void
797isdn_tty_resume(char *id, modem_info * info, atemu * m)
798{
799 int usg = ISDN_USAGE_MODEM;
800 int si = 7;
801 int l2 = m->mdmreg[REG_L2PROT];
802 isdn_ctrl cmd;
803 ulong flags;
804 int i;
805 int j;
806 int l;
807
808 l = strlen(id);
809 for (j = 7; j >= 0; j--)
810 if (m->mdmreg[REG_SI1] & (1 << j)) {
811 si = bit2si[j];
812 break;
813 }
814 usg = isdn_calc_usage(si, l2);
815#ifdef CONFIG_ISDN_AUDIO
816 if ((si == 1) &&
817 (l2 != ISDN_PROTO_L2_MODEM)
818#ifdef CONFIG_ISDN_TTY_FAX
819 && (l2 != ISDN_PROTO_L2_FAX)
820#endif
821 ) {
822 l2 = ISDN_PROTO_L2_TRANS;
823 usg = ISDN_USAGE_VOICE;
824 }
825#endif
826 m->mdmreg[REG_SI1I] = si2bit[si];
827 spin_lock_irqsave(&dev->lock, flags);
828 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
829 if (i < 0) {
830 spin_unlock_irqrestore(&dev->lock, flags);
831 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
832 } else {
833 info->isdn_driver = dev->drvmap[i];
834 info->isdn_channel = dev->chanmap[i];
835 info->drv_index = i;
836 dev->m_idx[i] = info->line;
837 dev->usage[i] |= ISDN_USAGE_OUTGOING;
838 info->last_dir = 1;
839// strcpy(info->last_num, n);
840 isdn_info_update();
841 spin_unlock_irqrestore(&dev->lock, flags);
842 cmd.driver = info->isdn_driver;
843 cmd.arg = info->isdn_channel;
844 cmd.command = ISDN_CMD_CLREAZ;
845 isdn_command(&cmd);
846 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
847 cmd.driver = info->isdn_driver;
848 cmd.command = ISDN_CMD_SETEAZ;
849 isdn_command(&cmd);
850 cmd.driver = info->isdn_driver;
851 cmd.command = ISDN_CMD_SETL2;
852 info->last_l2 = l2;
853 cmd.arg = info->isdn_channel + (l2 << 8);
854 isdn_command(&cmd);
855 cmd.driver = info->isdn_driver;
856 cmd.command = ISDN_CMD_SETL3;
857 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
858 isdn_command(&cmd);
859 cmd.driver = info->isdn_driver;
860 cmd.arg = info->isdn_channel;
861 cmd.parm.cmsg.Length = l+18;
862 cmd.parm.cmsg.Command = CAPI_FACILITY;
863 cmd.parm.cmsg.Subcommand = CAPI_REQ;
864 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
865 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
866 cmd.parm.cmsg.para[1] = 0;
867 cmd.parm.cmsg.para[2] = l+3;
868 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
869 cmd.parm.cmsg.para[4] = 0;
870 cmd.parm.cmsg.para[5] = l;
871 strncpy(&cmd.parm.cmsg.para[6], id, l);
872 cmd.command =CAPI_PUT_MESSAGE;
873 info->dialing = 1;
874// strcpy(dev->num[i], n);
875 isdn_info_update();
876 isdn_command(&cmd);
877 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
878 }
879}
880
881/* isdn_tty_send_msg() sends a message to a HL driver
882 * This is used for hybrid modem cards to send AT commands to it
883 */
884
885static void
886isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
887{
888 int usg = ISDN_USAGE_MODEM;
889 int si = 7;
890 int l2 = m->mdmreg[REG_L2PROT];
891 isdn_ctrl cmd;
892 ulong flags;
893 int i;
894 int j;
895 int l;
896
897 l = strlen(msg);
898 if (!l) {
899 isdn_tty_modem_result(RESULT_ERROR, info);
900 return;
901 }
902 for (j = 7; j >= 0; j--)
903 if (m->mdmreg[REG_SI1] & (1 << j)) {
904 si = bit2si[j];
905 break;
906 }
907 usg = isdn_calc_usage(si, l2);
908#ifdef CONFIG_ISDN_AUDIO
909 if ((si == 1) &&
910 (l2 != ISDN_PROTO_L2_MODEM)
911#ifdef CONFIG_ISDN_TTY_FAX
912 && (l2 != ISDN_PROTO_L2_FAX)
913#endif
914 ) {
915 l2 = ISDN_PROTO_L2_TRANS;
916 usg = ISDN_USAGE_VOICE;
917 }
918#endif
919 m->mdmreg[REG_SI1I] = si2bit[si];
920 spin_lock_irqsave(&dev->lock, flags);
921 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
922 if (i < 0) {
923 spin_unlock_irqrestore(&dev->lock, flags);
924 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
925 } else {
926 info->isdn_driver = dev->drvmap[i];
927 info->isdn_channel = dev->chanmap[i];
928 info->drv_index = i;
929 dev->m_idx[i] = info->line;
930 dev->usage[i] |= ISDN_USAGE_OUTGOING;
931 info->last_dir = 1;
932 isdn_info_update();
933 spin_unlock_irqrestore(&dev->lock, flags);
934 cmd.driver = info->isdn_driver;
935 cmd.arg = info->isdn_channel;
936 cmd.command = ISDN_CMD_CLREAZ;
937 isdn_command(&cmd);
938 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
939 cmd.driver = info->isdn_driver;
940 cmd.command = ISDN_CMD_SETEAZ;
941 isdn_command(&cmd);
942 cmd.driver = info->isdn_driver;
943 cmd.command = ISDN_CMD_SETL2;
944 info->last_l2 = l2;
945 cmd.arg = info->isdn_channel + (l2 << 8);
946 isdn_command(&cmd);
947 cmd.driver = info->isdn_driver;
948 cmd.command = ISDN_CMD_SETL3;
949 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
950 isdn_command(&cmd);
951 cmd.driver = info->isdn_driver;
952 cmd.arg = info->isdn_channel;
953 cmd.parm.cmsg.Length = l+14;
954 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
955 cmd.parm.cmsg.Subcommand = CAPI_REQ;
956 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
957 cmd.parm.cmsg.para[0] = l+1;
958 strncpy(&cmd.parm.cmsg.para[1], msg, l);
959 cmd.parm.cmsg.para[l+1] = 0xd;
960 cmd.command =CAPI_PUT_MESSAGE;
961/* info->dialing = 1;
962 strcpy(dev->num[i], n);
963 isdn_info_update();
964*/
965 isdn_command(&cmd);
966 }
967}
968
969static inline int
970isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
971{
972#ifdef MODEM_PARANOIA_CHECK
973 if (!info) {
974 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
975 name, routine);
976 return 1;
977 }
978 if (info->magic != ISDN_ASYNC_MAGIC) {
979 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
980 name, routine);
981 return 1;
982 }
983#endif
984 return 0;
985}
986
987/*
988 * This routine is called to set the UART divisor registers to match
989 * the specified baud rate for a serial port.
990 */
991static void
992isdn_tty_change_speed(modem_info * info)
993{
994 uint cflag,
995 cval,
996 fcr,
997 quot;
998 int i;
999
1000 if (!info->tty || !info->tty->termios)
1001 return;
1002 cflag = info->tty->termios->c_cflag;
1003
1004 quot = i = cflag & CBAUD;
1005 if (i & CBAUDEX) {
1006 i &= ~CBAUDEX;
1007 if (i < 1 || i > 2)
1008 info->tty->termios->c_cflag &= ~CBAUDEX;
1009 else
1010 i += 15;
1011 }
1012 if (quot) {
1013 info->mcr |= UART_MCR_DTR;
1014 isdn_tty_modem_ncarrier(info);
1015 } else {
1016 info->mcr &= ~UART_MCR_DTR;
1017 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1018#ifdef ISDN_DEBUG_MODEM_HUP
1019 printk(KERN_DEBUG "Mhup in changespeed\n");
1020#endif
1021 if (info->online)
1022 info->ncarrier = 1;
1023 isdn_tty_modem_reset_regs(info, 0);
1024 isdn_tty_modem_hup(info, 1);
1025 }
1026 return;
1027 }
1028 /* byte size and parity */
1029 cval = cflag & (CSIZE | CSTOPB);
1030 cval >>= 4;
1031 if (cflag & PARENB)
1032 cval |= UART_LCR_PARITY;
1033 if (!(cflag & PARODD))
1034 cval |= UART_LCR_EPAR;
1035 fcr = 0;
1036
1037 /* CTS flow control flag and modem status interrupts */
1038 if (cflag & CRTSCTS) {
1039 info->flags |= ISDN_ASYNC_CTS_FLOW;
1040 } else
1041 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1042 if (cflag & CLOCAL)
1043 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1044 else {
1045 info->flags |= ISDN_ASYNC_CHECK_CD;
1046 }
1047}
1048
1049static int
1050isdn_tty_startup(modem_info * info)
1051{
1052 if (info->flags & ISDN_ASYNC_INITIALIZED)
1053 return 0;
1054 isdn_lock_drivers();
1055#ifdef ISDN_DEBUG_MODEM_OPEN
1056 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1057#endif
1058 /*
1059 * Now, initialize the UART
1060 */
1061 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1062 if (info->tty)
1063 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1064 /*
1065 * and set the speed of the serial port
1066 */
1067 isdn_tty_change_speed(info);
1068
1069 info->flags |= ISDN_ASYNC_INITIALIZED;
1070 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1071 info->send_outstanding = 0;
1072 return 0;
1073}
1074
1075/*
1076 * This routine will shutdown a serial port; interrupts are disabled, and
1077 * DTR is dropped if the hangup on close termio flag is on.
1078 */
1079static void
1080isdn_tty_shutdown(modem_info * info)
1081{
1082 if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1083 return;
1084#ifdef ISDN_DEBUG_MODEM_OPEN
1085 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1086#endif
1087 isdn_unlock_drivers();
1088 info->msr &= ~UART_MSR_RI;
1089 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1090 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1091 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1092 isdn_tty_modem_reset_regs(info, 0);
1093#ifdef ISDN_DEBUG_MODEM_HUP
1094 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1095#endif
1096 isdn_tty_modem_hup(info, 1);
1097 }
1098 }
1099 if (info->tty)
1100 set_bit(TTY_IO_ERROR, &info->tty->flags);
1101
1102 info->flags &= ~ISDN_ASYNC_INITIALIZED;
1103}
1104
1105/* isdn_tty_write() is the main send-routine. It is called from the upper
1106 * levels within the kernel to perform sending data. Depending on the
1107 * online-flag it either directs output to the at-command-interpreter or
1108 * to the lower level. Additional tasks done here:
1109 * - If online, check for escape-sequence (+++)
1110 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1111 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1112 * - If dialing, abort dial.
1113 */
1114static int
1115isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
1116{
1117 int c;
1118 int total = 0;
1119 modem_info *info = (modem_info *) tty->driver_data;
1120 atemu *m = &info->emu;
1121
1122 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1123 return 0;
1124 /* See isdn_tty_senddown() */
1125 atomic_inc(&info->xmit_lock);
1126 while (1) {
1127 c = count;
1128 if (c > info->xmit_size - info->xmit_count)
1129 c = info->xmit_size - info->xmit_count;
1130 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1131 c = dev->drv[info->isdn_driver]->maxbufsize;
1132 if (c <= 0)
1133 break;
1134 if ((info->online > 1)
1135#ifdef CONFIG_ISDN_AUDIO
1136 || (info->vonline & 3)
1137#endif
1138 ) {
1139#ifdef CONFIG_ISDN_AUDIO
1140 if (!info->vonline)
1141#endif
1142 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1143 &(m->pluscount),
1144 &(m->lastplus));
1145 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1146#ifdef CONFIG_ISDN_AUDIO
1147 if (info->vonline) {
1148 int cc = isdn_tty_handleDLEdown(info, m, c);
1149 if (info->vonline & 2) {
1150 if (!cc) {
1151 /* If DLE decoding results in zero-transmit, but
1152 * c originally was non-zero, do a wakeup.
1153 */
1154 tty_wakeup(tty);
1155 info->msr |= UART_MSR_CTS;
1156 info->lsr |= UART_LSR_TEMT;
1157 }
1158 info->xmit_count += cc;
1159 }
1160 if ((info->vonline & 3) == 1) {
1161 /* Do NOT handle Ctrl-Q or Ctrl-S
1162 * when in full-duplex audio mode.
1163 */
1164 if (isdn_tty_end_vrx(buf, c)) {
1165 info->vonline &= ~1;
1166#ifdef ISDN_DEBUG_MODEM_VOICE
1167 printk(KERN_DEBUG
1168 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1169 info->line);
1170#endif
1171 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1172 }
1173 }
1174 } else
1175 if (TTY_IS_FCLASS1(info)) {
1176 int cc = isdn_tty_handleDLEdown(info, m, c);
1177
1178 if (info->vonline & 4) { /* ETX seen */
1179 isdn_ctrl c;
1180
1181 c.command = ISDN_CMD_FAXCMD;
1182 c.driver = info->isdn_driver;
1183 c.arg = info->isdn_channel;
1184 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1185 c.parm.aux.subcmd = ETX;
1186 isdn_command(&c);
1187 }
1188 info->vonline = 0;
1189#ifdef ISDN_DEBUG_MODEM_VOICE
1190 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1191#endif
1192 info->xmit_count += cc;
1193 } else
1194#endif
1195 info->xmit_count += c;
1196 } else {
1197 info->msr |= UART_MSR_CTS;
1198 info->lsr |= UART_LSR_TEMT;
1199 if (info->dialing) {
1200 info->dialing = 0;
1201#ifdef ISDN_DEBUG_MODEM_HUP
1202 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1203#endif
1204 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1205 isdn_tty_modem_hup(info, 1);
1206 } else
1207 c = isdn_tty_edit_at(buf, c, info);
1208 }
1209 buf += c;
1210 count -= c;
1211 total += c;
1212 }
1213 atomic_dec(&info->xmit_lock);
b03efcfb 1214 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1da177e4
LT		 1215 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1216 isdn_tty_senddown(info);
1217 isdn_tty_tint(info);
1218 }
1219 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1220 }
1221 return total;
1222}
1223
1224static int
1225isdn_tty_write_room(struct tty_struct *tty)
1226{
1227 modem_info *info = (modem_info *) tty->driver_data;
1228 int ret;
1229
1230 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1231 return 0;
1232 if (!info->online)
1233 return info->xmit_size;
1234 ret = info->xmit_size - info->xmit_count;
1235 return (ret < 0) ? 0 : ret;
1236}
1237
1238static int
1239isdn_tty_chars_in_buffer(struct tty_struct *tty)
1240{
1241 modem_info *info = (modem_info *) tty->driver_data;
1242
1243 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1244 return 0;
1245 if (!info->online)
1246 return 0;
1247 return (info->xmit_count);
1248}
1249
1250static void
1251isdn_tty_flush_buffer(struct tty_struct *tty)
1252{
1253 modem_info *info;
1254
1255 if (!tty) {
1256 return;
1257 }
1258 info = (modem_info *) tty->driver_data;
1259 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1260 return;
1261 }
1262 isdn_tty_cleanup_xmit(info);
1263 info->xmit_count = 0;
1da177e4
LT		 1264 tty_wakeup(tty);
1265}
1266
1267static void
1268isdn_tty_flush_chars(struct tty_struct *tty)
1269{
1270 modem_info *info = (modem_info *) tty->driver_data;
1271
1272 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1273 return;
b03efcfb 1274 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1da177e4
LT		 1275 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1276}
1277
1278/*
1279 * ------------------------------------------------------------
1280 * isdn_tty_throttle()
1281 *
1282 * This routine is called by the upper-layer tty layer to signal that
1283 * incoming characters should be throttled.
1284 * ------------------------------------------------------------
1285 */
1286static void
1287isdn_tty_throttle(struct tty_struct *tty)
1288{
1289 modem_info *info = (modem_info *) tty->driver_data;
1290
1291 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1292 return;
1293 if (I_IXOFF(tty))
1294 info->x_char = STOP_CHAR(tty);
1295 info->mcr &= ~UART_MCR_RTS;
1296}
1297
1298static void
1299isdn_tty_unthrottle(struct tty_struct *tty)
1300{
1301 modem_info *info = (modem_info *) tty->driver_data;
1302
1303 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1304 return;
1305 if (I_IXOFF(tty)) {
1306 if (info->x_char)
1307 info->x_char = 0;
1308 else
1309 info->x_char = START_CHAR(tty);
1310 }
1311 info->mcr |= UART_MCR_RTS;
1312}
1313
1314/*
1315 * ------------------------------------------------------------
1316 * isdn_tty_ioctl() and friends
1317 * ------------------------------------------------------------
1318 */
1319
1320/*
1321 * isdn_tty_get_lsr_info - get line status register info
1322 *
1323 * Purpose: Let user call ioctl() to get info when the UART physically
1324 * is emptied. On bus types like RS485, the transmitter must
1325 * release the bus after transmitting. This must be done when
1326 * the transmit shift register is empty, not be done when the
1327 * transmit holding register is empty. This functionality
1328 * allows RS485 driver to be written in user space.
1329 */
1330static int
1331isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1332{
1333 u_char status;
1334 uint result;
1335
1336 status = info->lsr;
1337 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1338 return put_user(result, value);
1339}
1340
1341
1342static int
1343isdn_tty_tiocmget(struct tty_struct *tty, struct file *file)
1344{
1345 modem_info *info = (modem_info *) tty->driver_data;
1346 u_char control, status;
1347
1348 if (isdn_tty_paranoia_check(info, tty->name, __FUNCTION__))
1349 return -ENODEV;
1350 if (tty->flags & (1 << TTY_IO_ERROR))
1351 return -EIO;
1352
1353#ifdef ISDN_DEBUG_MODEM_IOCTL
1354 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1355#endif
1356
1357 control = info->mcr;
1358 status = info->msr;
1359 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1360 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1361 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1362 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1363 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1364 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1365}
1366
1367static int
1368isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
1369 unsigned int set, unsigned int clear)
1370{
1371 modem_info *info = (modem_info *) tty->driver_data;
1372
1373 if (isdn_tty_paranoia_check(info, tty->name, __FUNCTION__))
1374 return -ENODEV;
1375 if (tty->flags & (1 << TTY_IO_ERROR))
1376 return -EIO;
1377
1378#ifdef ISDN_DEBUG_MODEM_IOCTL
1379 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1380#endif
1381
1382 if (set & TIOCM_RTS)
1383 info->mcr |= UART_MCR_RTS;
1384 if (set & TIOCM_DTR) {
1385 info->mcr |= UART_MCR_DTR;
1386 isdn_tty_modem_ncarrier(info);
1387 }
1388
1389 if (clear & TIOCM_RTS)
1390 info->mcr &= ~UART_MCR_RTS;
1391 if (clear & TIOCM_DTR) {
1392 info->mcr &= ~UART_MCR_DTR;
1393 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1394 isdn_tty_modem_reset_regs(info, 0);
1395#ifdef ISDN_DEBUG_MODEM_HUP
1396 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1397#endif
1398 if (info->online)
1399 info->ncarrier = 1;
1400 isdn_tty_modem_hup(info, 1);
1401 }
1402 }
1403 return 0;
1404}
1405
1406static int
1407isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
1408 uint cmd, ulong arg)
1409{
1410 modem_info *info = (modem_info *) tty->driver_data;
1411 int retval;
1412
1413 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1414 return -ENODEV;
1415 if (tty->flags & (1 << TTY_IO_ERROR))
1416 return -EIO;
1417 switch (cmd) {
1418 case TCSBRK: /* SVID version: non-zero arg --> no break */
1419#ifdef ISDN_DEBUG_MODEM_IOCTL
1420 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1421#endif
1422 retval = tty_check_change(tty);
1423 if (retval)
1424 return retval;
1425 tty_wait_until_sent(tty, 0);
1426 return 0;
1427 case TCSBRKP: /* support for POSIX tcsendbreak() */
1428#ifdef ISDN_DEBUG_MODEM_IOCTL
1429 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1430#endif
1431 retval = tty_check_change(tty);
1432 if (retval)
1433 return retval;
1434 tty_wait_until_sent(tty, 0);
1435 return 0;
1436 case TIOCGSOFTCAR:
1437#ifdef ISDN_DEBUG_MODEM_IOCTL
1438 printk(KERN_DEBUG "ttyI%d ioctl TIOCGSOFTCAR\n", info->line);
1439#endif
1440 return put_user(C_CLOCAL(tty) ? 1 : 0, (ulong __user *) arg);
1441 case TIOCSSOFTCAR:
1442#ifdef ISDN_DEBUG_MODEM_IOCTL
1443 printk(KERN_DEBUG "ttyI%d ioctl TIOCSSOFTCAR\n", info->line);
1444#endif
1445 if (get_user(arg, (ulong __user *) arg))
1446 return -EFAULT;
1447 tty->termios->c_cflag =
1448 ((tty->termios->c_cflag & ~CLOCAL) |
1449 (arg ? CLOCAL : 0));
1450 return 0;
1451 case TIOCSERGETLSR: /* Get line status register */
1452#ifdef ISDN_DEBUG_MODEM_IOCTL
1453 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1454#endif
1455 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1456 default:
1457#ifdef ISDN_DEBUG_MODEM_IOCTL
1458 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1459#endif
1460 return -ENOIOCTLCMD;
1461 }
1462 return 0;
1463}
1464
1465static void
606d099c 1466isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4
LT		 1467{
1468 modem_info *info = (modem_info *) tty->driver_data;
1469
1470 if (!old_termios)
1471 isdn_tty_change_speed(info);
1472 else {
1473 if (tty->termios->c_cflag == old_termios->c_cflag)
1474 return;
1475 isdn_tty_change_speed(info);
1476 if ((old_termios->c_cflag & CRTSCTS) &&
1477 !(tty->termios->c_cflag & CRTSCTS)) {
1478 tty->hw_stopped = 0;
1479 }
1480 }
1481}
1482
1483/*
1484 * ------------------------------------------------------------
1485 * isdn_tty_open() and friends
1486 * ------------------------------------------------------------
1487 */
1488static int
1489isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1490{
1491 DECLARE_WAITQUEUE(wait, NULL);
1492 int do_clocal = 0;
1493 int retval;
1494
1495 /*
1496 * If the device is in the middle of being closed, then block
1497 * until it's done, and then try again.
1498 */
1499 if (tty_hung_up_p(filp) ||
1500 (info->flags & ISDN_ASYNC_CLOSING)) {
1501 if (info->flags & ISDN_ASYNC_CLOSING)
1502 interruptible_sleep_on(&info->close_wait);
1503#ifdef MODEM_DO_RESTART
1504 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1505 return -EAGAIN;
1506 else
1507 return -ERESTARTSYS;
1508#else
1509 return -EAGAIN;
1510#endif
1511 }
1512 /*
1513 * If non-blocking mode is set, then make the check up front
1514 * and then exit.
1515 */
1516 if ((filp->f_flags & O_NONBLOCK) ||
1517 (tty->flags & (1 << TTY_IO_ERROR))) {
1518 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1519 return -EBUSY;
1520 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1521 return 0;
1522 }
1523 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1524 if (info->normal_termios.c_cflag & CLOCAL)
1525 do_clocal = 1;
1526 } else {
1527 if (tty->termios->c_cflag & CLOCAL)
1528 do_clocal = 1;
1529 }
1530 /*
1531 * Block waiting for the carrier detect and the line to become
1532 * free (i.e., not in use by the callout). While we are in
1533 * this loop, info->count is dropped by one, so that
1534 * isdn_tty_close() knows when to free things. We restore it upon
1535 * exit, either normal or abnormal.
1536 */
1537 retval = 0;
1538 add_wait_queue(&info->open_wait, &wait);
1539#ifdef ISDN_DEBUG_MODEM_OPEN
1540 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1541 info->line, info->count);
1542#endif
1543 if (!(tty_hung_up_p(filp)))
1544 info->count--;
1545 info->blocked_open++;
1546 while (1) {
1547 set_current_state(TASK_INTERRUPTIBLE);
1548 if (tty_hung_up_p(filp) ||
1549 !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1550#ifdef MODEM_DO_RESTART
1551 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1552 retval = -EAGAIN;
1553 else
1554 retval = -ERESTARTSYS;
1555#else
1556 retval = -EAGAIN;
1557#endif
1558 break;
1559 }
1560 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1561 !(info->flags & ISDN_ASYNC_CLOSING) &&
1562 (do_clocal || (info->msr & UART_MSR_DCD))) {
1563 break;
1564 }
1565 if (signal_pending(current)) {
1566 retval = -ERESTARTSYS;
1567 break;
1568 }
1569#ifdef ISDN_DEBUG_MODEM_OPEN
1570 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1571 info->line, info->count);
1572#endif
1573 schedule();
1574 }
1575 current->state = TASK_RUNNING;
1576 remove_wait_queue(&info->open_wait, &wait);
1577 if (!tty_hung_up_p(filp))
1578 info->count++;
1579 info->blocked_open--;
1580#ifdef ISDN_DEBUG_MODEM_OPEN
1581 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1582 info->line, info->count);
1583#endif
1584 if (retval)
1585 return retval;
1586 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1587 return 0;
1588}
1589
1590/*
1591 * This routine is called whenever a serial port is opened. It
1592 * enables interrupts for a serial port, linking in its async structure into
1593 * the IRQ chain. It also performs the serial-specific
1594 * initialization for the tty structure.
1595 */
1596static int
1597isdn_tty_open(struct tty_struct *tty, struct file *filp)
1598{
1599 modem_info *info;
1600 int retval, line;
1601
1602 line = tty->index;
1603 if (line < 0 || line > ISDN_MAX_CHANNELS)
1604 return -ENODEV;
1605 info = &dev->mdm.info[line];
1606 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1607 return -ENODEV;
1608 if (!try_module_get(info->owner)) {
1609 printk(KERN_WARNING "%s: cannot reserve module\n", __FUNCTION__);
1610 return -ENODEV;
1611 }
1612#ifdef ISDN_DEBUG_MODEM_OPEN
1613 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1614 info->count);
1615#endif
1616 info->count++;
1617 tty->driver_data = info;
1618 info->tty = tty;
1619 /*
1620 * Start up serial port
1621 */
1622 retval = isdn_tty_startup(info);
1623 if (retval) {
1624#ifdef ISDN_DEBUG_MODEM_OPEN
1625 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1626#endif
1627 module_put(info->owner);
1628 return retval;
1629 }
1630 retval = isdn_tty_block_til_ready(tty, filp, info);
1631 if (retval) {
1632#ifdef ISDN_DEBUG_MODEM_OPEN
1633 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1634#endif
1635 module_put(info->owner);
1636 return retval;
1637 }
1638#ifdef ISDN_DEBUG_MODEM_OPEN
1639 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1640#endif
1641 dev->modempoll++;
1642#ifdef ISDN_DEBUG_MODEM_OPEN
1643 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1644#endif
1645 return 0;
1646}
1647
1648static void
1649isdn_tty_close(struct tty_struct *tty, struct file *filp)
1650{
1651 modem_info *info = (modem_info *) tty->driver_data;
1652 ulong timeout;
1653
1654 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1655 return;
1656 if (tty_hung_up_p(filp)) {
1657#ifdef ISDN_DEBUG_MODEM_OPEN
1658 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1659#endif
1660 return;
1661 }
1662 if ((tty->count == 1) && (info->count != 1)) {
1663 /*
1664 * Uh, oh. tty->count is 1, which means that the tty
1665 * structure will be freed. Info->count should always
1666 * be one in these conditions. If it's greater than
1667 * one, we've got real problems, since it means the
1668 * serial port won't be shutdown.
1669 */
1670 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1671 "info->count is %d\n", info->count);
1672 info->count = 1;
1673 }
1674 if (--info->count < 0) {
1675 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1676 info->line, info->count);
1677 info->count = 0;
1678 }
1679 if (info->count) {
1680#ifdef ISDN_DEBUG_MODEM_OPEN
1681 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1682#endif
7cb9478f 1683 module_put(info->owner);
1da177e4
LT		 1684 return;
1685 }
1686 info->flags |= ISDN_ASYNC_CLOSING;
1687 /*
1688 * Save the termios structure, since this port may have
1689 * separate termios for callout and dialin.
1690 */
1691 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1692 info->normal_termios = *tty->termios;
1693 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1694 info->callout_termios = *tty->termios;
1695
1696 tty->closing = 1;
1697 /*
1698 * At this point we stop accepting input. To do this, we
1699 * disable the receive line status interrupts, and tell the
1700 * interrupt driver to stop checking the data ready bit in the
1701 * line status register.
1702 */
1703 if (info->flags & ISDN_ASYNC_INITIALIZED) {
1704 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1705 /*
1706 * Before we drop DTR, make sure the UART transmitter
1707 * has completely drained; this is especially
1708 * important if there is a transmit FIFO!
1709 */
1710 timeout = jiffies + HZ;
1711 while (!(info->lsr & UART_LSR_TEMT)) {
24763c48 1712 schedule_timeout_interruptible(20);
1da177e4
LT		 1713 if (time_after(jiffies,timeout))
1714 break;
1715 }
1716 }
1717 dev->modempoll--;
1718 isdn_tty_shutdown(info);
1719
1720 if (tty->driver->flush_buffer)
1721 tty->driver->flush_buffer(tty);
1722 tty_ldisc_flush(tty);
1723 info->tty = NULL;
1724 info->ncarrier = 0;
1725 tty->closing = 0;
1726 module_put(info->owner);
1727 if (info->blocked_open) {
1728 msleep_interruptible(500);
1729 wake_up_interruptible(&info->open_wait);
1730 }
1731 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1732 wake_up_interruptible(&info->close_wait);
1733#ifdef ISDN_DEBUG_MODEM_OPEN
1734 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1735#endif
1736}
1737
1738/*
1739 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1740 */
1741static void
1742isdn_tty_hangup(struct tty_struct *tty)
1743{
1744 modem_info *info = (modem_info *) tty->driver_data;
1745
1746 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1747 return;
1748 isdn_tty_shutdown(info);
1749 info->count = 0;
1750 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1751 info->tty = NULL;
1752 wake_up_interruptible(&info->open_wait);
1753}
1754
1755/* This routine initializes all emulator-data.
1756 */
1757static void
1758isdn_tty_reset_profile(atemu * m)
1759{
1760 m->profile[0] = 0;
1761 m->profile[1] = 0;
1762 m->profile[2] = 43;
1763 m->profile[3] = 13;
1764 m->profile[4] = 10;
1765 m->profile[5] = 8;
1766 m->profile[6] = 3;
1767 m->profile[7] = 60;
1768 m->profile[8] = 2;
1769 m->profile[9] = 6;
1770 m->profile[10] = 7;
1771 m->profile[11] = 70;
1772 m->profile[12] = 0x45;
1773 m->profile[13] = 4;
1774 m->profile[14] = ISDN_PROTO_L2_X75I;
1775 m->profile[15] = ISDN_PROTO_L3_TRANS;
1776 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1777 m->profile[17] = ISDN_MODEM_WINSIZE;
1778 m->profile[18] = 4;
1779 m->profile[19] = 0;
1780 m->profile[20] = 0;
1781 m->profile[23] = 0;
1782 m->pmsn[0] = '\0';
1783 m->plmsn[0] = '\0';
1784}
1785
1786#ifdef CONFIG_ISDN_AUDIO
1787static void
1788isdn_tty_modem_reset_vpar(atemu * m)
1789{
1790 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1791 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1792 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1793 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1794 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1795 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1796}
1797#endif
1798
1799#ifdef CONFIG_ISDN_TTY_FAX
1800static void
1801isdn_tty_modem_reset_faxpar(modem_info * info)
1802{
1803 T30_s *f = info->fax;
1804
1805 f->code = 0;
1806 f->phase = ISDN_FAX_PHASE_IDLE;
1807 f->direction = 0;
1808 f->resolution = 1; /* fine */
1809 f->rate = 5; /* 14400 bit/s */
1810 f->width = 0;
1811 f->length = 0;
1812 f->compression = 0;
1813 f->ecm = 0;
1814 f->binary = 0;
1815 f->scantime = 0;
1816 memset(&f->id[0], 32, FAXIDLEN - 1);
1817 f->id[FAXIDLEN - 1] = 0;
1818 f->badlin = 0;
1819 f->badmul = 0;
1820 f->bor = 0;
1821 f->nbc = 0;
1822 f->cq = 0;
1823 f->cr = 0;
1824 f->ctcrty = 0;
1825 f->minsp = 0;
1826 f->phcto = 30;
1827 f->rel = 0;
1828 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1829 f->pollid[FAXIDLEN - 1] = 0;
1830}
1831#endif
1832
1833static void
1834isdn_tty_modem_reset_regs(modem_info * info, int force)
1835{
1836 atemu *m = &info->emu;
1837 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1838 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1839 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1840 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1841 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1842 }
1843#ifdef CONFIG_ISDN_AUDIO
1844 isdn_tty_modem_reset_vpar(m);
1845#endif
1846#ifdef CONFIG_ISDN_TTY_FAX
1847 isdn_tty_modem_reset_faxpar(info);
1848#endif
1849 m->mdmcmdl = 0;
1850}
1851
1852static void
1853modem_write_profile(atemu * m)
1854{
1855 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1856 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1857 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1858 if (dev->profd)
1859 send_sig(SIGIO, dev->profd, 1);
1860}
1861
b68e31d0 1862static const struct tty_operations modem_ops = {
1da177e4
LT		 1863 .open = isdn_tty_open,
1864 .close = isdn_tty_close,
1865 .write = isdn_tty_write,
1866 .flush_chars = isdn_tty_flush_chars,
1867 .write_room = isdn_tty_write_room,
1868 .chars_in_buffer = isdn_tty_chars_in_buffer,
1869 .flush_buffer = isdn_tty_flush_buffer,
1870 .ioctl = isdn_tty_ioctl,
1871 .throttle = isdn_tty_throttle,
1872 .unthrottle = isdn_tty_unthrottle,
1873 .set_termios = isdn_tty_set_termios,
1874 .hangup = isdn_tty_hangup,
1875 .tiocmget = isdn_tty_tiocmget,
1876 .tiocmset = isdn_tty_tiocmset,
1877};
1878
1879int
1880isdn_tty_modem_init(void)
1881{
1882 isdn_modem_t *m;
1883 int i, retval;
1884 modem_info *info;
1885
1886 m = &dev->mdm;
1887 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1888 if (!m->tty_modem)
1889 return -ENOMEM;
1890 m->tty_modem->name = "ttyI";
1da177e4
LT		 1891 m->tty_modem->major = ISDN_TTY_MAJOR;
1892 m->tty_modem->minor_start = 0;
1893 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1894 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1895 m->tty_modem->init_termios = tty_std_termios;
1896 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
331b8319 1897 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4
LT		 1898 m->tty_modem->driver_name = "isdn_tty";
1899 tty_set_operations(m->tty_modem, &modem_ops);
1900 retval = tty_register_driver(m->tty_modem);
1901 if (retval) {
1902 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1903 goto err;
1904 }
1905 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1906 info = &m->info[i];
1907#ifdef CONFIG_ISDN_TTY_FAX
1908 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1909 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1910 retval = -ENOMEM;
1911 goto err_unregister;
1912 }
1913#endif
1914#ifdef MODULE
1915 info->owner = THIS_MODULE;
1916#endif
1917 spin_lock_init(&info->readlock);
1918 init_MUTEX(&info->write_sem);
1919 sprintf(info->last_cause, "0000");
1920 sprintf(info->last_num, "none");
1921 info->last_dir = 0;
1922 info->last_lhup = 1;
1923 info->last_l2 = -1;
1924 info->last_si = 0;
1925 isdn_tty_reset_profile(&info->emu);
1926 isdn_tty_modem_reset_regs(info, 1);
1927 info->magic = ISDN_ASYNC_MAGIC;
1928 info->line = i;
1929 info->tty = NULL;
1930 info->x_char = 0;
1931 info->count = 0;
1932 info->blocked_open = 0;
1933 init_waitqueue_head(&info->open_wait);
1934 init_waitqueue_head(&info->close_wait);
1935 info->isdn_driver = -1;
1936 info->isdn_channel = -1;
1937 info->drv_index = -1;
1938 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1939 init_timer(&info->nc_timer);
1940 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1941 info->nc_timer.data = (unsigned long) info;
1942 skb_queue_head_init(&info->xmit_queue);
1943#ifdef CONFIG_ISDN_AUDIO
1944 skb_queue_head_init(&info->dtmf_queue);
1945#endif
1946 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1947 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1948 retval = -ENOMEM;
1949 goto err_unregister;
1950 }
1951 /* Make room for T.70 header */
1952 info->xmit_buf += 4;
1953 }
1954 return 0;
1955err_unregister:
1956 for (i--; i >= 0; i--) {
1957 info = &m->info[i];
1958#ifdef CONFIG_ISDN_TTY_FAX
1959 kfree(info->fax);
1960#endif
1961 kfree(info->xmit_buf - 4);
1962 }
1963 tty_unregister_driver(m->tty_modem);
1964 err:
1965 put_tty_driver(m->tty_modem);
1966 m->tty_modem = NULL;
1967 return retval;
1968}
1969
1970void
1971isdn_tty_exit(void)
1972{
1973 modem_info *info;
1974 int i;
1975
1976 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1977 info = &dev->mdm.info[i];
1978 isdn_tty_cleanup_xmit(info);
1979#ifdef CONFIG_ISDN_TTY_FAX
1980 kfree(info->fax);
1981#endif
1982 kfree(info->xmit_buf - 4);
1983 }
1984 tty_unregister_driver(dev->mdm.tty_modem);
1985 put_tty_driver(dev->mdm.tty_modem);
1986 dev->mdm.tty_modem = NULL;
1987}
1988
1989
1990/*
1991 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1992 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1993 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1994 */
1995
1996static int
1997isdn_tty_match_icall(char *cid, atemu *emu, int di)
1998{
1999#ifdef ISDN_DEBUG_MODEM_ICALL
2000 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
2001 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
2002 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
2003#endif
2004 if (strlen(emu->lmsn)) {
2005 char *p = emu->lmsn;
2006 char *q;
2007 int tmp;
2008 int ret = 0;
2009
2010 while (1) {
2011 if ((q = strchr(p, ';')))
2012 *q = '\0';
2013 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2014 ret = tmp;
2015#ifdef ISDN_DEBUG_MODEM_ICALL
2016 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2017 p, isdn_map_eaz2msn(emu->msn, di), tmp);
2018#endif
2019 if (q) {
2020 *q = ';';
2021 p = q;
2022 p++;
2023 }
2024 if (!tmp)
2025 return 0;
2026 if (!q)
2027 break;
2028 }
2029 return ret;
2030 } else {
2031 int tmp;
2032 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2033#ifdef ISDN_DEBUG_MODEM_ICALL
2034 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2035 isdn_map_eaz2msn(emu->msn, di), tmp);
2036#endif
2037 return tmp;
2038 }
2039}
2040
2041/*
2042 * An incoming call-request has arrived.
2043 * Search the tty-devices for an appropriate device and bind
2044 * it to the ISDN-Channel.
2045 * Return:
2046 *
2047 * 0 = No matching device found.
2048 * 1 = A matching device found.
2049 * 3 = No match found, but eventually would match, if
2050 * CID is longer.
2051 */
2052int
2053isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2054{
2055 char *eaz;
2056 int i;
2057 int wret;
2058 int idx;
2059 int si1;
2060 int si2;
2061 char *nr;
2062 ulong flags;
2063
2064 if (!setup->phone[0]) {
2065 nr = "0";
2066 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2067 } else
2068 nr = setup->phone;
2069 si1 = (int) setup->si1;
2070 si2 = (int) setup->si2;
2071 if (!setup->eazmsn[0]) {
2072 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2073 eaz = "0";
2074 } else
2075 eaz = setup->eazmsn;
2076#ifdef ISDN_DEBUG_MODEM_ICALL
2077 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2078#endif
2079 wret = 0;
2080 spin_lock_irqsave(&dev->lock, flags);
2081 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2082 modem_info *info = &dev->mdm.info[i];
2083
2084 if (info->count == 0)
2085 continue;
2086 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
2087 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
2088 idx = isdn_dc2minor(di, ch);
2089#ifdef ISDN_DEBUG_MODEM_ICALL
2090 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2091 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2092 info->flags, info->isdn_driver, info->isdn_channel,
2093 dev->usage[idx]);
2094#endif
2095 if (
2096#ifndef FIX_FILE_TRANSFER
2097 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2098#endif
2099 (info->isdn_driver == -1) &&
2100 (info->isdn_channel == -1) &&
2101 (USG_NONE(dev->usage[idx]))) {
2102 int matchret;
2103
2104 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2105 wret = matchret;
2106 if (!matchret) { /* EAZ is matching */
2107 info->isdn_driver = di;
2108 info->isdn_channel = ch;
2109 info->drv_index = idx;
2110 dev->m_idx[idx] = info->line;
2111 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2112 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2113 strcpy(dev->num[idx], nr);
2114 strcpy(info->emu.cpn, eaz);
2115 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2116 info->emu.mdmreg[REG_PLAN] = setup->plan;
2117 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2118 isdn_info_update();
2119 spin_unlock_irqrestore(&dev->lock, flags);
2120 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2121 info->line);
2122 info->msr |= UART_MSR_RI;
2123 isdn_tty_modem_result(RESULT_RING, info);
2124 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2125 return 1;
2126 }
2127 }
2128 }
2129 }
2130 spin_unlock_irqrestore(&dev->lock, flags);
2131 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2132 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2133 return (wret == 2)?3:0;
2134}
2135
2136#define TTY_IS_ACTIVE(info) \
2137 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2138
2139int
2140isdn_tty_stat_callback(int i, isdn_ctrl *c)
2141{
2142 int mi;
2143 modem_info *info;
2144 char *e;
2145
2146 if (i < 0)
2147 return 0;
2148 if ((mi = dev->m_idx[i]) >= 0) {
2149 info = &dev->mdm.info[mi];
2150 switch (c->command) {
2151 case ISDN_STAT_CINF:
2152 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2153 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2154 if (e == (char *)c->parm.num)
2155 info->emu.charge = 0;
2156
2157 break;
2158 case ISDN_STAT_BSENT:
2159#ifdef ISDN_TTY_STAT_DEBUG
2160 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2161#endif
2162 if ((info->isdn_driver == c->driver) &&
2163 (info->isdn_channel == c->arg)) {
2164 info->msr |= UART_MSR_CTS;
2165 if (info->send_outstanding)
2166 if (!(--info->send_outstanding))
2167 info->lsr |= UART_LSR_TEMT;
2168 isdn_tty_tint(info);
2169 return 1;
2170 }
2171 break;
2172 case ISDN_STAT_CAUSE:
2173#ifdef ISDN_TTY_STAT_DEBUG
2174 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2175#endif
2176 /* Signal cause to tty-device */
2177 strncpy(info->last_cause, c->parm.num, 5);
2178 return 1;
2179 case ISDN_STAT_DISPLAY:
2180#ifdef ISDN_TTY_STAT_DEBUG
2181 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2182#endif
2183 /* Signal display to tty-device */
2184 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2185 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2186 isdn_tty_at_cout("\r\n", info);
2187 isdn_tty_at_cout("DISPLAY: ", info);
2188 isdn_tty_at_cout(c->parm.display, info);
2189 isdn_tty_at_cout("\r\n", info);
2190 }
2191 return 1;
2192 case ISDN_STAT_DCONN:
2193#ifdef ISDN_TTY_STAT_DEBUG
2194 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2195#endif
2196 if (TTY_IS_ACTIVE(info)) {
2197 if (info->dialing == 1) {
2198 info->dialing = 2;
2199 return 1;
2200 }
2201 }
2202 break;
2203 case ISDN_STAT_DHUP:
2204#ifdef ISDN_TTY_STAT_DEBUG
2205 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2206#endif
2207 if (TTY_IS_ACTIVE(info)) {
2208 if (info->dialing == 1)
2209 isdn_tty_modem_result(RESULT_BUSY, info);
2210 if (info->dialing > 1)
2211 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2212 info->dialing = 0;
2213#ifdef ISDN_DEBUG_MODEM_HUP
2214 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2215#endif
2216 isdn_tty_modem_hup(info, 0);
2217 return 1;
2218 }
2219 break;
2220 case ISDN_STAT_BCONN:
2221#ifdef ISDN_TTY_STAT_DEBUG
2222 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2223#endif
2224 /* Wake up any processes waiting
2225 * for incoming call of this device when
2226 * DCD follow the state of incoming carrier
2227 */
2228 if (info->blocked_open &&
2229 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2230 wake_up_interruptible(&info->open_wait);
2231 }
2232
2233 /* Schedule CONNECT-Message to any tty
2234 * waiting for it and
2235 * set DCD-bit of its modem-status.
2236 */
2237 if (TTY_IS_ACTIVE(info) ||
2238 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2239 info->msr |= UART_MSR_DCD;
2240 info->emu.charge = 0;
2241 if (info->dialing & 0xf)
2242 info->last_dir = 1;
2243 else
2244 info->last_dir = 0;
2245 info->dialing = 0;
2246 info->rcvsched = 1;
2247 if (USG_MODEM(dev->usage[i])) {
2248 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2249 strcpy(info->emu.connmsg, c->parm.num);
2250 isdn_tty_modem_result(RESULT_CONNECT, info);
2251 } else
2252 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2253 }
2254 if (USG_VOICE(dev->usage[i]))
2255 isdn_tty_modem_result(RESULT_VCON, info);
2256 return 1;
2257 }
2258 break;
2259 case ISDN_STAT_BHUP:
2260#ifdef ISDN_TTY_STAT_DEBUG
2261 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2262#endif
2263 if (TTY_IS_ACTIVE(info)) {
2264#ifdef ISDN_DEBUG_MODEM_HUP
2265 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2266#endif
2267 isdn_tty_modem_hup(info, 0);
2268 return 1;
2269 }
2270 break;
2271 case ISDN_STAT_NODCH:
2272#ifdef ISDN_TTY_STAT_DEBUG
2273 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2274#endif
2275 if (TTY_IS_ACTIVE(info)) {
2276 if (info->dialing) {
2277 info->dialing = 0;
2278 info->last_l2 = -1;
2279 info->last_si = 0;
2280 sprintf(info->last_cause, "0000");
2281 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2282 }
2283 isdn_tty_modem_hup(info, 0);
2284 return 1;
2285 }
2286 break;
2287 case ISDN_STAT_UNLOAD:
2288#ifdef ISDN_TTY_STAT_DEBUG
2289 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2290#endif
2291 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2292 info = &dev->mdm.info[i];
2293 if (info->isdn_driver == c->driver) {
2294 if (info->online)
2295 isdn_tty_modem_hup(info, 1);
2296 }
2297 }
2298 return 1;
2299#ifdef CONFIG_ISDN_TTY_FAX
2300 case ISDN_STAT_FAXIND:
2301 if (TTY_IS_ACTIVE(info)) {
2302 isdn_tty_fax_command(info, c);
2303 }
2304 break;
2305#endif
2306#ifdef CONFIG_ISDN_AUDIO
2307 case ISDN_STAT_AUDIO:
2308 if (TTY_IS_ACTIVE(info)) {
2309 switch(c->parm.num[0]) {
2310 case ISDN_AUDIO_DTMF:
2311 if (info->vonline) {
2312 isdn_audio_put_dle_code(info,
2313 c->parm.num[1]);
2314 }
2315 break;
2316 }
2317 }
2318 break;
2319#endif
2320 }
2321 }
2322 return 0;
2323}
2324
2325/*********************************************************************
2326 Modem-Emulator-Routines
2327 *********************************************************************/
2328
2329#define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2330
2331/*
2332 * Put a message from the AT-emulator into receive-buffer of tty,
2333 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2334 */
2335void
2336isdn_tty_at_cout(char *msg, modem_info * info)
2337{
2338 struct tty_struct *tty;
2339 atemu *m = &info->emu;
2340 char *p;
2341 char c;
2342 u_long flags;
2343 struct sk_buff *skb = NULL;
2344 char *sp = NULL;
1f4d4a80 2345 int l;
1da177e4
LT		 2346
2347 if (!msg) {
2348 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2349 return;
2350 }
1f4d4a80
AB		 2351
2352 l = strlen(msg);
2353
1da177e4
LT		 2354 spin_lock_irqsave(&info->readlock, flags);
2355 tty = info->tty;
2356 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2357 spin_unlock_irqrestore(&info->readlock, flags);
2358 return;
2359 }
2360
33f0f88f
AC		 2361 /* use queue instead of direct, if online and */
2362 /* data is in queue or buffer is full */
61b9a26a
KK		 2363 if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2364 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
33f0f88f 2365 skb = alloc_skb(l, GFP_ATOMIC);
1da177e4
LT		 2366 if (!skb) {
2367 spin_unlock_irqrestore(&info->readlock, flags);
2368 return;
2369 }
33f0f88f 2370 sp = skb_put(skb, l);
1da177e4
LT		 2371#ifdef CONFIG_ISDN_AUDIO
2372 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2373 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2374#endif
2375 }
2376
2377 for (p = msg; *p; p++) {
2378 switch (*p) {
2379 case '\r':
2380 c = m->mdmreg[REG_CR];
2381 break;
2382 case '\n':
2383 c = m->mdmreg[REG_LF];
2384 break;
2385 case '\b':
2386 c = m->mdmreg[REG_BS];
2387 break;
2388 default:
2389 c = *p;
2390 }
2391 if (skb) {
2392 *sp++ = c;
2393 } else {
33f0f88f 2394 if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
1da177e4 2395 break;
1da177e4
LT		 2396 }
2397 }
2398 if (skb) {
2399 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2400 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2401 spin_unlock_irqrestore(&info->readlock, flags);
2402 /* Schedule dequeuing */
33f0f88f 2403 if (dev->modempoll && info->rcvsched)
1da177e4
LT		 2404 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2405
2406 } else {
2407 spin_unlock_irqrestore(&info->readlock, flags);
33f0f88f 2408 tty_flip_buffer_push(tty);
1da177e4
LT		 2409 }
2410}
2411
2412/*
2413 * Perform ATH Hangup
2414 */
2415static void
2416isdn_tty_on_hook(modem_info * info)
2417{
2418 if (info->isdn_channel >= 0) {
2419#ifdef ISDN_DEBUG_MODEM_HUP
2420 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2421#endif
2422 isdn_tty_modem_hup(info, 1);
2423 }
2424}
2425
2426static void
2427isdn_tty_off_hook(void)
2428{
2429 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2430}
2431
2432#define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
2433#define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
2434
2435/*
2436 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2437 * isdn_tty_modem_escape() if sequence found.
2438 *
2439 * Parameters:
2440 * p pointer to databuffer
2441 * plus escape-character
2442 * count length of buffer
2443 * pluscount count of valid escape-characters so far
2444 * lastplus timestamp of last character
2445 */
2446static void
2447isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2448 u_long *lastplus)
2449{
2450 if (plus > 127)
2451 return;
2452 if (count > 3) {
2453 p += count - 3;
2454 count = 3;
2455 *pluscount = 0;
2456 }
2457 while (count > 0) {
2458 if (*(p++) == plus) {
2459 if ((*pluscount)++) {
2460 /* Time since last '+' > 0.5 sec. ? */
2461 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2462 *pluscount = 1;
2463 } else {
2464 /* Time since last non-'+' < 1.5 sec. ? */
2465 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2466 *pluscount = 0;
2467 }
2468 if ((*pluscount == 3) && (count == 1))
2469 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2470 if (*pluscount > 3)
2471 *pluscount = 1;
2472 } else
2473 *pluscount = 0;
2474 *lastplus = jiffies;
2475 count--;
2476 }
2477}
2478
2479/*
2480 * Return result of AT-emulator to tty-receive-buffer, depending on
2481 * modem-register 12, bit 0 and 1.
2482 * For CONNECT-messages also switch to online-mode.
2483 * For RING-message handle auto-ATA if register 0 != 0
2484 */
2485
2486static void
2487isdn_tty_modem_result(int code, modem_info * info)
2488{
2489 atemu *m = &info->emu;
2490 static char *msg[] =
2491 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2492 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2493 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2494 char s[ISDN_MSNLEN+10];
2495
2496 switch (code) {
2497 case RESULT_RING:
2498 m->mdmreg[REG_RINGCNT]++;
2499 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2500 /* Automatically accept incoming call */
2501 isdn_tty_cmd_ATA(info);
2502 break;
2503 case RESULT_NO_CARRIER:
2504#ifdef ISDN_DEBUG_MODEM_HUP
2505 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2506 (info->flags & ISDN_ASYNC_CLOSING),
2507 (!info->tty));
2508#endif
2509 m->mdmreg[REG_RINGCNT] = 0;
2510 del_timer(&info->nc_timer);
2511 info->ncarrier = 0;
2512 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2513 return;
2514 }
2515#ifdef CONFIG_ISDN_AUDIO
2516 if (info->vonline & 1) {
2517#ifdef ISDN_DEBUG_MODEM_VOICE
2518 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2519 info->line);
2520#endif
2521 /* voice-recording, add DLE-ETX */
2522 isdn_tty_at_cout("\020\003", info);
2523 }
2524 if (info->vonline & 2) {
2525#ifdef ISDN_DEBUG_MODEM_VOICE
2526 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2527 info->line);
2528#endif
2529 /* voice-playing, add DLE-DC4 */
2530 isdn_tty_at_cout("\020\024", info);
2531 }
2532#endif
2533 break;
2534 case RESULT_CONNECT:
2535 case RESULT_CONNECT64000:
2536 sprintf(info->last_cause, "0000");
2537 if (!info->online)
2538 info->online = 2;
2539 break;
2540 case RESULT_VCON:
2541#ifdef ISDN_DEBUG_MODEM_VOICE
2542 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2543 info->line);
2544#endif
2545 sprintf(info->last_cause, "0000");
2546 if (!info->online)
2547 info->online = 1;
2548 break;
2549 } /* switch(code) */
2550
2551 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2552 /* Show results */
2553 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2554 /* Show numeric results only */
2555 sprintf(s, "\r\n%d\r\n", code);
2556 isdn_tty_at_cout(s, info);
2557 } else {
2558 if (code == RESULT_RING) {
2559 /* return if "show RUNG" and ringcounter>1 */
2560 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2561 (m->mdmreg[REG_RINGCNT] > 1))
2562 return;
2563 /* print CID, _before_ _every_ ring */
2564 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2565 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2566 isdn_tty_at_cout(dev->num[info->drv_index], info);
2567 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2568 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2569 isdn_tty_at_cout(info->emu.cpn, info);
2570 }
2571 }
2572 }
2573 isdn_tty_at_cout("\r\n", info);
2574 isdn_tty_at_cout(msg[code], info);
2575 switch (code) {
2576 case RESULT_CONNECT:
2577 switch (m->mdmreg[REG_L2PROT]) {
2578 case ISDN_PROTO_L2_MODEM:
2579 isdn_tty_at_cout(" ", info);
2580 isdn_tty_at_cout(m->connmsg, info);
2581 break;
2582 }
2583 break;
2584 case RESULT_RING:
2585 /* Append CPN, if enabled */
2586 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2587 sprintf(s, "/%s", m->cpn);
2588 isdn_tty_at_cout(s, info);
2589 }
2590 /* Print CID only once, _after_ 1st RING */
2591 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2592 (m->mdmreg[REG_RINGCNT] == 1)) {
2593 isdn_tty_at_cout("\r\n", info);
2594 isdn_tty_at_cout("CALLER NUMBER: ", info);
2595 isdn_tty_at_cout(dev->num[info->drv_index], info);
2596 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2597 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2598 isdn_tty_at_cout(info->emu.cpn, info);
2599 }
2600 }
2601 break;
2602 case RESULT_NO_CARRIER:
2603 case RESULT_NO_DIALTONE:
2604 case RESULT_BUSY:
2605 case RESULT_NO_ANSWER:
2606 m->mdmreg[REG_RINGCNT] = 0;
2607 /* Append Cause-Message if enabled */
2608 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2609 sprintf(s, "/%s", info->last_cause);
2610 isdn_tty_at_cout(s, info);
2611 }
2612 break;
2613 case RESULT_CONNECT64000:
2614 /* Append Protocol to CONNECT message */
2615 switch (m->mdmreg[REG_L2PROT]) {
2616 case ISDN_PROTO_L2_X75I:
2617 case ISDN_PROTO_L2_X75UI:
2618 case ISDN_PROTO_L2_X75BUI:
2619 isdn_tty_at_cout("/X.75", info);
2620 break;
2621 case ISDN_PROTO_L2_HDLC:
2622 isdn_tty_at_cout("/HDLC", info);
2623 break;
2624 case ISDN_PROTO_L2_V11096:
2625 isdn_tty_at_cout("/V110/9600", info);
2626 break;
2627 case ISDN_PROTO_L2_V11019:
2628 isdn_tty_at_cout("/V110/19200", info);
2629 break;
2630 case ISDN_PROTO_L2_V11038:
2631 isdn_tty_at_cout("/V110/38400", info);
2632 break;
2633 }
2634 if (m->mdmreg[REG_T70] & BIT_T70) {
2635 isdn_tty_at_cout("/T.70", info);
2636 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2637 isdn_tty_at_cout("+", info);
2638 }
2639 break;
2640 }
2641 isdn_tty_at_cout("\r\n", info);
2642 }
2643 }
2644 if (code == RESULT_NO_CARRIER) {
2645 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2646 return;
2647 }
00409bb0
MG		 2648#ifdef CONFIG_ISDN_AUDIO
2649 if ( !info->vonline )
2650 tty_ldisc_flush(info->tty);
2651#else
1da177e4 2652 tty_ldisc_flush(info->tty);
00409bb0 2653#endif
1da177e4
LT		 2654 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2655 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2656 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2657 tty_hangup(info->tty);
2658 }
2659 }
2660}
2661
2662
2663/*
2664 * Display a modem-register-value.
2665 */
2666static void
2667isdn_tty_show_profile(int ridx, modem_info * info)
2668{
2669 char v[6];
2670
2671 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2672 isdn_tty_at_cout(v, info);
2673}
2674
2675/*
2676 * Get MSN-string from char-pointer, set pointer to end of number
2677 */
2678static void
2679isdn_tty_get_msnstr(char *n, char **p)
2680{
2681 int limit = ISDN_MSNLEN - 1;
2682
2683 while (((*p[0] >= '0' && *p[0] <= '9') ||
2684 /* Why a comma ??? */
2685 (*p[0] == ',') || (*p[0] == ':')) &&
2686 (limit--))
2687 *n++ = *p[0]++;
2688 *n = '\0';
2689}
2690
2691/*
2692 * Get phone-number from modem-commandbuffer
2693 */
2694static void
2695isdn_tty_getdial(char *p, char *q,int cnt)
2696{
2697 int first = 1;
2698 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2699 buffer overflow */
2700
924ad158 2701 while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) {
1da177e4 2702 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
924ad158 2703 ((*p == 'R') && first) ||
1da177e4
LT		 2704 (*p == '*') || (*p == '#')) {
2705 *q++ = *p;
2706 limit--;
2707 }
2708 if(!limit)
2709 break;
2710 p++;
2711 first = 0;
2712 }
2713 *q = 0;
2714}
2715
2716#define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2717#define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2718
2719static void
2720isdn_tty_report(modem_info * info)
2721{
2722 atemu *m = &info->emu;
2723 char s[80];
2724
2725 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2726 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2727 isdn_tty_at_cout(s, info);
2728 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2729 isdn_tty_at_cout(s, info);
2730 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2731 switch (info->last_l2) {
2732 case ISDN_PROTO_L2_X75I:
2733 isdn_tty_at_cout("X.75i", info);
2734 break;
2735 case ISDN_PROTO_L2_X75UI:
2736 isdn_tty_at_cout("X.75ui", info);
2737 break;
2738 case ISDN_PROTO_L2_X75BUI:
2739 isdn_tty_at_cout("X.75bui", info);
2740 break;
2741 case ISDN_PROTO_L2_HDLC:
2742 isdn_tty_at_cout("HDLC", info);
2743 break;
2744 case ISDN_PROTO_L2_V11096:
2745 isdn_tty_at_cout("V.110 9600 Baud", info);
2746 break;
2747 case ISDN_PROTO_L2_V11019:
2748 isdn_tty_at_cout("V.110 19200 Baud", info);
2749 break;
2750 case ISDN_PROTO_L2_V11038:
2751 isdn_tty_at_cout("V.110 38400 Baud", info);
2752 break;
2753 case ISDN_PROTO_L2_TRANS:
2754 isdn_tty_at_cout("transparent", info);
2755 break;
2756 case ISDN_PROTO_L2_MODEM:
2757 isdn_tty_at_cout("modem", info);
2758 break;
2759 case ISDN_PROTO_L2_FAX:
2760 isdn_tty_at_cout("fax", info);
2761 break;
2762 default:
2763 isdn_tty_at_cout("unknown", info);
2764 break;
2765 }
2766 if (m->mdmreg[REG_T70] & BIT_T70) {
2767 isdn_tty_at_cout("/T.70", info);
2768 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2769 isdn_tty_at_cout("+", info);
2770 }
2771 isdn_tty_at_cout("\r\n", info);
2772 isdn_tty_at_cout(" Service: ", info);
2773 switch (info->last_si) {
2774 case 1:
2775 isdn_tty_at_cout("audio\r\n", info);
2776 break;
2777 case 5:
2778 isdn_tty_at_cout("btx\r\n", info);
2779 break;
2780 case 7:
2781 isdn_tty_at_cout("data\r\n", info);
2782 break;
2783 default:
2784 sprintf(s, "%d\r\n", info->last_si);
2785 isdn_tty_at_cout(s, info);
2786 break;
2787 }
2788 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2789 isdn_tty_at_cout(s, info);
2790 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2791 isdn_tty_at_cout(s, info);
2792}
2793
2794/*
2795 * Parse AT&.. commands.
2796 */
2797static int
2798isdn_tty_cmd_ATand(char **p, modem_info * info)
2799{
2800 atemu *m = &info->emu;
2801 int i;
2802 char rb[100];
2803
2804#define MAXRB (sizeof(rb) - 1)
2805
2806 switch (*p[0]) {
2807 case 'B':
2808 /* &B - Set Buffersize */
2809 p[0]++;
2810 i = isdn_getnum(p);
2811 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2812 PARSE_ERROR1;
2813#ifdef CONFIG_ISDN_AUDIO
2814 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2815 PARSE_ERROR1;
2816#endif
2817 m->mdmreg[REG_PSIZE] = i / 16;
2818 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2819 switch (m->mdmreg[REG_L2PROT]) {
2820 case ISDN_PROTO_L2_V11096:
2821 case ISDN_PROTO_L2_V11019:
2822 case ISDN_PROTO_L2_V11038:
2823 info->xmit_size /= 10;
2824 }
2825 break;
2826 case 'C':
2827 /* &C - DCD Status */
2828 p[0]++;
2829 switch (isdn_getnum(p)) {
2830 case 0:
2831 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2832 break;
2833 case 1:
2834 m->mdmreg[REG_DCD] |= BIT_DCD;
2835 break;
2836 default:
2837 PARSE_ERROR1
2838 }
2839 break;
2840 case 'D':
2841 /* &D - Set DTR-Low-behavior */
2842 p[0]++;
2843 switch (isdn_getnum(p)) {
2844 case 0:
2845 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2846 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2847 break;
2848 case 2:
2849 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2850 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2851 break;
2852 case 3:
2853 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2854 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2855 break;
2856 default:
2857 PARSE_ERROR1
2858 }
2859 break;
2860 case 'E':
2861 /* &E -Set EAZ/MSN */
2862 p[0]++;
2863 isdn_tty_get_msnstr(m->msn, p);
2864 break;
2865 case 'F':
2866 /* &F -Set Factory-Defaults */
2867 p[0]++;
2868 if (info->msr & UART_MSR_DCD)
2869 PARSE_ERROR1;
2870 isdn_tty_reset_profile(m);
2871 isdn_tty_modem_reset_regs(info, 1);
2872 break;
2873#ifdef DUMMY_HAYES_AT
2874 case 'K':
2875 /* only for be compilant with common scripts */
2876 /* &K Flowcontrol - no function */
2877 p[0]++;
2878 isdn_getnum(p);
2879 break;
2880#endif
2881 case 'L':
2882 /* &L -Set Numbers to listen on */
2883 p[0]++;
2884 i = 0;
2885 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
a6a61c54 2886 (i < ISDN_LMSNLEN - 1))
1da177e4
LT		 2887 m->lmsn[i++] = *p[0]++;
2888 m->lmsn[i] = '\0';
2889 break;
2890 case 'R':
2891 /* &R - Set V.110 bitrate adaption */
2892 p[0]++;
2893 i = isdn_getnum(p);
2894 switch (i) {
2895 case 0:
2896 /* Switch off V.110, back to X.75 */
2897 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2898 m->mdmreg[REG_SI2] = 0;
2899 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2900 break;
2901 case 9600:
2902 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2903 m->mdmreg[REG_SI2] = 197;
2904 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2905 break;
2906 case 19200:
2907 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2908 m->mdmreg[REG_SI2] = 199;
2909 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2910 break;
2911 case 38400:
2912 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2913 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2914 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2915 break;
2916 default:
2917 PARSE_ERROR1;
2918 }
2919 /* Switch off T.70 */
2920 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2921 /* Set Service 7 */
2922 m->mdmreg[REG_SI1] |= 4;
2923 break;
2924 case 'S':
2925 /* &S - Set Windowsize */
2926 p[0]++;
2927 i = isdn_getnum(p);
2928 if ((i > 0) && (i < 9))
2929 m->mdmreg[REG_WSIZE] = i;
2930 else
2931 PARSE_ERROR1;
2932 break;
2933 case 'V':
2934 /* &V - Show registers */
2935 p[0]++;
2936 isdn_tty_at_cout("\r\n", info);
2937 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2938 sprintf(rb, "S%02d=%03d%s", i,
2939 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2940 isdn_tty_at_cout(rb, info);
2941 }
2942 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2943 strlen(m->msn) ? m->msn : "None");
2944 isdn_tty_at_cout(rb, info);
2945 if (strlen(m->lmsn)) {
2946 isdn_tty_at_cout("\r\nListen: ", info);
2947 isdn_tty_at_cout(m->lmsn, info);
2948 isdn_tty_at_cout("\r\n", info);
2949 }
2950 break;
2951 case 'W':
2952 /* &W - Write Profile */
2953 p[0]++;
2954 switch (*p[0]) {
2955 case '0':
2956 p[0]++;
2957 modem_write_profile(m);
2958 break;
2959 default:
2960 PARSE_ERROR1;
2961 }
2962 break;
2963 case 'X':
2964 /* &X - Switch to BTX-Mode and T.70 */
2965 p[0]++;
2966 switch (isdn_getnum(p)) {
2967 case 0:
2968 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2969 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2970 break;
2971 case 1:
2972 m->mdmreg[REG_T70] |= BIT_T70;
2973 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2974 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2975 info->xmit_size = 112;
2976 m->mdmreg[REG_SI1] = 4;
2977 m->mdmreg[REG_SI2] = 0;
2978 break;
2979 case 2:
2980 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2981 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2982 info->xmit_size = 112;
2983 m->mdmreg[REG_SI1] = 4;
2984 m->mdmreg[REG_SI2] = 0;
2985 break;
2986 default:
2987 PARSE_ERROR1;
2988 }
2989 break;
2990 default:
2991 PARSE_ERROR1;
2992 }
2993 return 0;
2994}
2995
2996static int
2997isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
2998{
2999 /* Some plausibility checks */
3000 switch (mreg) {
3001 case REG_L2PROT:
3002 if (mval > ISDN_PROTO_L2_MAX)
3003 return 1;
3004 break;
3005 case REG_PSIZE:
3006 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
3007 return 1;
3008#ifdef CONFIG_ISDN_AUDIO
3009 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
3010 return 1;
3011#endif
3012 info->xmit_size = mval * 16;
3013 switch (m->mdmreg[REG_L2PROT]) {
3014 case ISDN_PROTO_L2_V11096:
3015 case ISDN_PROTO_L2_V11019:
3016 case ISDN_PROTO_L2_V11038:
3017 info->xmit_size /= 10;
3018 }
3019 break;
3020 case REG_SI1I:
3021 case REG_PLAN:
3022 case REG_SCREEN:
3023 /* readonly registers */
3024 return 1;
3025 }
3026 return 0;
3027}
3028
3029/*
3030 * Perform ATS command
3031 */
3032static int
3033isdn_tty_cmd_ATS(char **p, modem_info * info)
3034{
3035 atemu *m = &info->emu;
3036 int bitpos;
3037 int mreg;
3038 int mval;
3039 int bval;
3040
3041 mreg = isdn_getnum(p);
3042 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3043 PARSE_ERROR1;
3044 switch (*p[0]) {
3045 case '=':
3046 p[0]++;
3047 mval = isdn_getnum(p);
3048 if (mval < 0 || mval > 255)
3049 PARSE_ERROR1;
3050 if (isdn_tty_check_ats(mreg, mval, info, m))
3051 PARSE_ERROR1;
3052 m->mdmreg[mreg] = mval;
3053 break;
3054 case '.':
3055 /* Set/Clear a single bit */
3056 p[0]++;
3057 bitpos = isdn_getnum(p);
3058 if ((bitpos < 0) || (bitpos > 7))
3059 PARSE_ERROR1;
3060 switch (*p[0]) {
3061 case '=':
3062 p[0]++;
3063 bval = isdn_getnum(p);
3064 if (bval < 0 || bval > 1)
3065 PARSE_ERROR1;
3066 if (bval)
3067 mval = m->mdmreg[mreg] | (1 << bitpos);
3068 else
3069 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3070 if (isdn_tty_check_ats(mreg, mval, info, m))
3071 PARSE_ERROR1;
3072 m->mdmreg[mreg] = mval;
3073 break;
3074 case '?':
3075 p[0]++;
3076 isdn_tty_at_cout("\r\n", info);
3077 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3078 info);
3079 break;
3080 default:
3081 PARSE_ERROR1;
3082 }
3083 break;
3084 case '?':
3085 p[0]++;
3086 isdn_tty_show_profile(mreg, info);
3087 break;
3088 default:
3089 PARSE_ERROR1;
3090 break;
3091 }
3092 return 0;
3093}
3094
3095/*
3096 * Perform ATA command
3097 */
3098static void
3099isdn_tty_cmd_ATA(modem_info * info)
3100{
3101 atemu *m = &info->emu;
3102 isdn_ctrl cmd;
3103 int l2;
3104
3105 if (info->msr & UART_MSR_RI) {
3106 /* Accept incoming call */
3107 info->last_dir = 0;
3108 strcpy(info->last_num, dev->num[info->drv_index]);
3109 m->mdmreg[REG_RINGCNT] = 0;
3110 info->msr &= ~UART_MSR_RI;
3111 l2 = m->mdmreg[REG_L2PROT];
3112#ifdef CONFIG_ISDN_AUDIO
3113 /* If more than one bit set in reg18, autoselect Layer2 */
3114 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3115 if (m->mdmreg[REG_SI1I] == 1) {
3116 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3117 l2 = ISDN_PROTO_L2_TRANS;
3118 } else
3119 l2 = ISDN_PROTO_L2_X75I;
3120 }
3121#endif
3122 cmd.driver = info->isdn_driver;
3123 cmd.command = ISDN_CMD_SETL2;
3124 cmd.arg = info->isdn_channel + (l2 << 8);
3125 info->last_l2 = l2;
3126 isdn_command(&cmd);
3127 cmd.driver = info->isdn_driver;
3128 cmd.command = ISDN_CMD_SETL3;
3129 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3130#ifdef CONFIG_ISDN_TTY_FAX
3131 if (l2 == ISDN_PROTO_L2_FAX) {
3132 cmd.parm.fax = info->fax;
3133 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3134 }
3135#endif
3136 isdn_command(&cmd);
3137 cmd.driver = info->isdn_driver;
3138 cmd.arg = info->isdn_channel;
3139 cmd.command = ISDN_CMD_ACCEPTD;
3140 info->dialing = 16;
3141 info->emu.carrierwait = 0;
3142 isdn_command(&cmd);
3143 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3144 } else
3145 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3146}
3147
3148#ifdef CONFIG_ISDN_AUDIO
3149/*
3150 * Parse AT+F.. commands
3151 */
3152static int
3153isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3154{
3155 atemu *m = &info->emu;
3156 char rs[20];
3157
3158 if (!strncmp(p[0], "CLASS", 5)) {
3159 p[0] += 5;
3160 switch (*p[0]) {
3161 case '?':
3162 p[0]++;
3163 sprintf(rs, "\r\n%d",
3164 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3165#ifdef CONFIG_ISDN_TTY_FAX
3166 if (TTY_IS_FCLASS2(info))
3167 sprintf(rs, "\r\n2");
3168 else if (TTY_IS_FCLASS1(info))
3169 sprintf(rs, "\r\n1");
3170#endif
3171 isdn_tty_at_cout(rs, info);
3172 break;
3173 case '=':
3174 p[0]++;
3175 switch (*p[0]) {
3176 case '0':
3177 p[0]++;
3178 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3179 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3180 m->mdmreg[REG_SI1] = 4;
3181 info->xmit_size =
3182 m->mdmreg[REG_PSIZE] * 16;
3183 break;
3184#ifdef CONFIG_ISDN_TTY_FAX
3185 case '1':
3186 p[0]++;
3187 if (!(dev->global_features &
3188 ISDN_FEATURE_L3_FCLASS1))
3189 PARSE_ERROR1;
3190 m->mdmreg[REG_SI1] = 1;
3191 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3192 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3193 info->xmit_size =
3194 m->mdmreg[REG_PSIZE] * 16;
3195 break;
3196 case '2':
3197 p[0]++;
3198 if (!(dev->global_features &
3199 ISDN_FEATURE_L3_FCLASS2))
3200 PARSE_ERROR1;
3201 m->mdmreg[REG_SI1] = 1;
3202 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3203 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3204 info->xmit_size =
3205 m->mdmreg[REG_PSIZE] * 16;
3206 break;
3207#endif
3208 case '8':
3209 p[0]++;
3210 /* L2 will change on dialout with si=1 */
3211 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3212 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3213 m->mdmreg[REG_SI1] = 5;
3214 info->xmit_size = VBUF;
3215 break;
3216 case '?':
3217 p[0]++;
3218 strcpy(rs, "\r\n0,");
3219#ifdef CONFIG_ISDN_TTY_FAX
3220 if (dev->global_features &
3221 ISDN_FEATURE_L3_FCLASS1)
3222 strcat(rs, "1,");
3223 if (dev->global_features &
3224 ISDN_FEATURE_L3_FCLASS2)
3225 strcat(rs, "2,");
3226#endif
3227 strcat(rs, "8");
3228 isdn_tty_at_cout(rs, info);
3229 break;
3230 default:
3231 PARSE_ERROR1;
3232 }
3233 break;
3234 default:
3235 PARSE_ERROR1;
3236 }
3237 return 0;
3238 }
3239#ifdef CONFIG_ISDN_TTY_FAX
3240 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3241#else
3242 PARSE_ERROR1;
3243#endif
3244}
3245
3246/*
3247 * Parse AT+V.. commands
3248 */
3249static int
3250isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3251{
3252 atemu *m = &info->emu;
3253 isdn_ctrl cmd;
3254 static char *vcmd[] =
3255 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3256 int i;
3257 int par1;
3258 int par2;
3259 char rs[20];
3260
3261 i = 0;
3262 while (vcmd[i]) {
3263 if (!strncmp(vcmd[i], p[0], 2)) {
3264 p[0] += 2;
3265 break;
3266 }
3267 i++;
3268 }
3269 switch (i) {
3270 case 0:
3271 /* AT+VNH - Auto hangup feature */
3272 switch (*p[0]) {
3273 case '?':
3274 p[0]++;
3275 isdn_tty_at_cout("\r\n1", info);
3276 break;
3277 case '=':
3278 p[0]++;
3279 switch (*p[0]) {
3280 case '1':
3281 p[0]++;
3282 break;
3283 case '?':
3284 p[0]++;
3285 isdn_tty_at_cout("\r\n1", info);
3286 break;
3287 default:
3288 PARSE_ERROR1;
3289 }
3290 break;
3291 default:
3292 PARSE_ERROR1;
3293 }
3294 break;
3295 case 1:
3296 /* AT+VIP - Reset all voice parameters */
3297 isdn_tty_modem_reset_vpar(m);
3298 break;
3299 case 2:
3300 /* AT+VLS - Select device, accept incoming call */
3301 switch (*p[0]) {
3302 case '?':
3303 p[0]++;
3304 sprintf(rs, "\r\n%d", m->vpar[0]);
3305 isdn_tty_at_cout(rs, info);
3306 break;
3307 case '=':
3308 p[0]++;
3309 switch (*p[0]) {
3310 case '0':
3311 p[0]++;
3312 m->vpar[0] = 0;
3313 break;
3314 case '2':
3315 p[0]++;
3316 m->vpar[0] = 2;
3317 break;
3318 case '?':
3319 p[0]++;
3320 isdn_tty_at_cout("\r\n0,2", info);
3321 break;
3322 default:
3323 PARSE_ERROR1;
3324 }
3325 break;
3326 default:
3327 PARSE_ERROR1;
3328 }
3329 break;
3330 case 3:
3331 /* AT+VRX - Start recording */
3332 if (!m->vpar[0])
3333 PARSE_ERROR1;
3334 if (info->online != 1) {
3335 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3336 return 1;
3337 }
3338 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3339 if (!info->dtmf_state) {
3340 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3341 PARSE_ERROR1;
3342 }
3343 info->silence_state = isdn_audio_silence_init(info->silence_state);
3344 if (!info->silence_state) {
3345 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3346 PARSE_ERROR1;
3347 }
3348 if (m->vpar[3] < 5) {
3349 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3350 if (!info->adpcmr) {
3351 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3352 PARSE_ERROR1;
3353 }
3354 }
3355#ifdef ISDN_DEBUG_AT
3356 printk(KERN_DEBUG "AT: +VRX\n");
3357#endif
3358 info->vonline |= 1;
3359 isdn_tty_modem_result(RESULT_CONNECT, info);
3360 return 0;
3361 break;
3362 case 4:
3363 /* AT+VSD - Silence detection */
3364 switch (*p[0]) {
3365 case '?':
3366 p[0]++;
3367 sprintf(rs, "\r\n<%d>,<%d>",
3368 m->vpar[1],
3369 m->vpar[2]);
3370 isdn_tty_at_cout(rs, info);
3371 break;
3372 case '=':
3373 p[0]++;
3374 if ((*p[0]>='0') && (*p[0]<='9')) {
3375 par1 = isdn_getnum(p);
3376 if ((par1 < 0) || (par1 > 31))
3377 PARSE_ERROR1;
3378 if (*p[0] != ',')
3379 PARSE_ERROR1;
3380 p[0]++;
3381 par2 = isdn_getnum(p);
3382 if ((par2 < 0) || (par2 > 255))
3383 PARSE_ERROR1;
3384 m->vpar[1] = par1;
3385 m->vpar[2] = par2;
3386 break;
3387 } else
3388 if (*p[0] == '?') {
3389 p[0]++;
3390 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3391 info);
3392 break;
3393 } else
3394 PARSE_ERROR1;
3395 break;
3396 default:
3397 PARSE_ERROR1;
3398 }
3399 break;
3400 case 5:
3401 /* AT+VSM - Select compression */
3402 switch (*p[0]) {
3403 case '?':
3404 p[0]++;
3405 sprintf(rs, "\r\n<%d>,<%d><8000>",
3406 m->vpar[3],
3407 m->vpar[1]);
3408 isdn_tty_at_cout(rs, info);
3409 break;
3410 case '=':
3411 p[0]++;
3412 switch (*p[0]) {
3413 case '2':
3414 case '3':
3415 case '4':
3416 case '5':
3417 case '6':
3418 par1 = isdn_getnum(p);
3419 if ((par1 < 2) || (par1 > 6))
3420 PARSE_ERROR1;
3421 m->vpar[3] = par1;
3422 break;
3423 case '?':
3424 p[0]++;
3425 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3426 info);
3427 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3428 info);
3429 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3430 info);
3431 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3432 info);
3433 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3434 info);
3435 break;
3436 default:
3437 PARSE_ERROR1;
3438 }
3439 break;
3440 default:
3441 PARSE_ERROR1;
3442 }
3443 break;
3444 case 6:
3445 /* AT+VTX - Start sending */
3446 if (!m->vpar[0])
3447 PARSE_ERROR1;
3448 if (info->online != 1) {
3449 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3450 return 1;
3451 }
3452 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3453 if (!info->dtmf_state) {
3454 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3455 PARSE_ERROR1;
3456 }
3457 if (m->vpar[3] < 5) {
3458 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3459 if (!info->adpcms) {
3460 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3461 PARSE_ERROR1;
3462 }
3463 }
3464#ifdef ISDN_DEBUG_AT
3465 printk(KERN_DEBUG "AT: +VTX\n");
3466#endif
3467 m->lastDLE = 0;
3468 info->vonline |= 2;
3469 isdn_tty_modem_result(RESULT_CONNECT, info);
3470 return 0;
3471 break;
3472 case 7:
3473 /* AT+VDD - DTMF detection */
3474 switch (*p[0]) {
3475 case '?':
3476 p[0]++;
3477 sprintf(rs, "\r\n<%d>,<%d>",
3478 m->vpar[4],
3479 m->vpar[5]);
3480 isdn_tty_at_cout(rs, info);
3481 break;
3482 case '=':
3483 p[0]++;
3484 if ((*p[0]>='0') && (*p[0]<='9')) {
3485 if (info->online != 1)
3486 PARSE_ERROR1;
3487 par1 = isdn_getnum(p);
3488 if ((par1 < 0) || (par1 > 15))
3489 PARSE_ERROR1;
3490 if (*p[0] != ',')
3491 PARSE_ERROR1;
3492 p[0]++;
3493 par2 = isdn_getnum(p);
3494 if ((par2 < 0) || (par2 > 255))
3495 PARSE_ERROR1;
3496 m->vpar[4] = par1;
3497 m->vpar[5] = par2;
3498 cmd.driver = info->isdn_driver;
3499 cmd.command = ISDN_CMD_AUDIO;
3500 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3501 cmd.parm.num[0] = par1;
3502 cmd.parm.num[1] = par2;
3503 isdn_command(&cmd);
3504 break;
3505 } else
3506 if (*p[0] == '?') {
3507 p[0]++;
3508 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3509 info);
3510 break;
3511 } else
3512 PARSE_ERROR1;
3513 break;
3514 default:
3515 PARSE_ERROR1;
3516 }
3517 break;
3518 default:
3519 PARSE_ERROR1;
3520 }
3521 return 0;
3522}
3523#endif /* CONFIG_ISDN_AUDIO */
3524
3525/*
3526 * Parse and perform an AT-command-line.
3527 */
3528static void
3529isdn_tty_parse_at(modem_info * info)
3530{
3531 atemu *m = &info->emu;
3532 char *p;
3533 char ds[40];
3534
3535#ifdef ISDN_DEBUG_AT
3536 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3537#endif
3538 for (p = &m->mdmcmd[2]; *p;) {
3539 switch (*p) {
3540 case ' ':
3541 p++;
3542 break;
3543 case 'A':
3544 /* A - Accept incoming call */
3545 p++;
3546 isdn_tty_cmd_ATA(info);
3547 return;
3548 break;
3549 case 'D':
3550 /* D - Dial */
3551 if (info->msr & UART_MSR_DCD)
3552 PARSE_ERROR;
3553 if (info->msr & UART_MSR_RI) {
3554 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3555 return;
3556 }
3557 isdn_tty_getdial(++p, ds, sizeof ds);
3558 p += strlen(p);
3559 if (!strlen(m->msn))
3560 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3561 else if (strlen(ds))
3562 isdn_tty_dial(ds, info, m);
3563 else
3564 PARSE_ERROR;
3565 return;
3566 case 'E':
3567 /* E - Turn Echo on/off */
3568 p++;
3569 switch (isdn_getnum(&p)) {
3570 case 0:
3571 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3572 break;
3573 case 1:
3574 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3575 break;
3576 default:
3577 PARSE_ERROR;
3578 }
3579 break;
3580 case 'H':
3581 /* H - On/Off-hook */
3582 p++;
3583 switch (*p) {
3584 case '0':
3585 p++;
3586 isdn_tty_on_hook(info);
3587 break;
3588 case '1':
3589 p++;
3590 isdn_tty_off_hook();
3591 break;
3592 default:
3593 isdn_tty_on_hook(info);
3594 break;
3595 }
3596 break;
3597 case 'I':
3598 /* I - Information */
3599 p++;
3600 isdn_tty_at_cout("\r\nLinux ISDN", info);
3601 switch (*p) {
3602 case '0':
3603 case '1':
3604 p++;
3605 break;
3606 case '2':
3607 p++;
3608 isdn_tty_report(info);
3609 break;
3610 case '3':
3611 p++;
3612 sprintf(ds, "\r\n%d", info->emu.charge);
3613 isdn_tty_at_cout(ds, info);
3614 break;
3615 default:;
3616 }
3617 break;
3618#ifdef DUMMY_HAYES_AT
3619 case 'L':
3620 case 'M':
3621 /* only for be compilant with common scripts */
3622 /* no function */
3623 p++;
3624 isdn_getnum(&p);
3625 break;
3626#endif
3627 case 'O':
3628 /* O - Go online */
3629 p++;
3630 if (info->msr & UART_MSR_DCD)
3631 /* if B-Channel is up */
3632 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3633 else
3634 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3635 return;
3636 case 'Q':
3637 /* Q - Turn Emulator messages on/off */
3638 p++;
3639 switch (isdn_getnum(&p)) {
3640 case 0:
3641 m->mdmreg[REG_RESP] |= BIT_RESP;
3642 break;
3643 case 1:
3644 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3645 break;
3646 default:
3647 PARSE_ERROR;
3648 }
3649 break;
3650 case 'S':
3651 /* S - Set/Get Register */
3652 p++;
3653 if (isdn_tty_cmd_ATS(&p, info))
3654 return;
3655 break;
3656 case 'V':
3657 /* V - Numeric or ASCII Emulator-messages */
3658 p++;
3659 switch (isdn_getnum(&p)) {
3660 case 0:
3661 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3662 break;
3663 case 1:
3664 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3665 break;
3666 default:
3667 PARSE_ERROR;
3668 }
3669 break;
3670 case 'Z':
3671 /* Z - Load Registers from Profile */
3672 p++;
3673 if (info->msr & UART_MSR_DCD) {
3674 info->online = 0;
3675 isdn_tty_on_hook(info);
3676 }
3677 isdn_tty_modem_reset_regs(info, 1);
3678 break;
3679 case '+':
3680 p++;
3681 switch (*p) {
3682#ifdef CONFIG_ISDN_AUDIO
3683 case 'F':
3684 p++;
3685 if (isdn_tty_cmd_PLUSF(&p, info))
3686 return;
3687 break;
3688 case 'V':
3689 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3690 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3691 PARSE_ERROR;
3692 p++;
3693 if (isdn_tty_cmd_PLUSV(&p, info))
3694 return;
3695 break;
3696#endif /* CONFIG_ISDN_AUDIO */
3697 case 'S': /* SUSPEND */
3698 p++;
3699 isdn_tty_get_msnstr(ds, &p);
3700 isdn_tty_suspend(ds, info, m);
3701 break;
3702 case 'R': /* RESUME */
3703 p++;
3704 isdn_tty_get_msnstr(ds, &p);
3705 isdn_tty_resume(ds, info, m);
3706 break;
3707 case 'M': /* MESSAGE */
3708 p++;
3709 isdn_tty_send_msg(info, m, p);
3710 break;
3711 default:
3712 PARSE_ERROR;
3713 }
3714 break;
3715 case '&':
3716 p++;
3717 if (isdn_tty_cmd_ATand(&p, info))
3718 return;
3719 break;
3720 default:
3721 PARSE_ERROR;
3722 }
3723 }
3724#ifdef CONFIG_ISDN_AUDIO
3725 if (!info->vonline)
3726#endif
3727 isdn_tty_modem_result(RESULT_OK, info);
3728}
3729
3730/* Need own toupper() because standard-toupper is not available
3731 * within modules.
3732 */
3733#define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3734
3735/*
3736 * Perform line-editing of AT-commands
3737 *
3738 * Parameters:
3739 * p inputbuffer
3740 * count length of buffer
3741 * channel index to line (minor-device)
3742 */
3743static int
3744isdn_tty_edit_at(const char *p, int count, modem_info * info)
3745{
3746 atemu *m = &info->emu;
3747 int total = 0;
3748 u_char c;
3749 char eb[2];
3750 int cnt;
3751
3752 for (cnt = count; cnt > 0; p++, cnt--) {
3753 c = *p;
3754 total++;
3755 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3756 /* Separator (CR or LF) */
3757 m->mdmcmd[m->mdmcmdl] = 0;
3758 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3759 eb[0] = c;
3760 eb[1] = 0;
3761 isdn_tty_at_cout(eb, info);
3762 }
3763 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3764 isdn_tty_parse_at(info);
3765 m->mdmcmdl = 0;
3766 continue;
3767 }
3768 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3769 /* Backspace-Function */
3770 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3771 if (m->mdmcmdl)
3772 m->mdmcmdl--;
3773 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3774 isdn_tty_at_cout("\b", info);
3775 }
3776 continue;
3777 }
3778 if (cmdchar(c)) {
3779 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3780 eb[0] = c;
3781 eb[1] = 0;
3782 isdn_tty_at_cout(eb, info);
3783 }
3784 if (m->mdmcmdl < 255) {
3785 c = my_toupper(c);
3786 switch (m->mdmcmdl) {
3787 case 1:
3788 if (c == 'T') {
3789 m->mdmcmd[m->mdmcmdl] = c;
3790 m->mdmcmd[++m->mdmcmdl] = 0;
3791 break;
3792 } else
3793 m->mdmcmdl = 0;
3794 /* Fall through, check for 'A' */
3795 case 0:
3796 if (c == 'A') {
3797 m->mdmcmd[m->mdmcmdl] = c;
3798 m->mdmcmd[++m->mdmcmdl] = 0;
3799 }
3800 break;
3801 default:
3802 m->mdmcmd[m->mdmcmdl] = c;
3803 m->mdmcmd[++m->mdmcmdl] = 0;
3804 }
3805 }
3806 }
3807 }
3808 return total;
3809}
3810
3811/*
3812 * Switch all modem-channels who are online and got a valid
3813 * escape-sequence 1.5 seconds ago, to command-mode.
3814 * This function is called every second via timer-interrupt from within
3815 * timer-dispatcher isdn_timer_function()
3816 */
3817void
3818isdn_tty_modem_escape(void)
3819{
3820 int ton = 0;
3821 int i;
3822 int midx;
3823
3824 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3825 if (USG_MODEM(dev->usage[i]))
3826 if ((midx = dev->m_idx[i]) >= 0) {
3827 modem_info *info = &dev->mdm.info[midx];
3828 if (info->online) {
3829 ton = 1;
3830 if ((info->emu.pluscount == 3) &&
3831 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3832 info->emu.pluscount = 0;
3833 info->online = 0;
3834 isdn_tty_modem_result(RESULT_OK, info);
3835 }
3836 }
3837 }
3838 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3839}
3840
3841/*
3842 * Put a RING-message to all modem-channels who have the RI-bit set.
3843 * This function is called every second via timer-interrupt from within
3844 * timer-dispatcher isdn_timer_function()
3845 */
3846void
3847isdn_tty_modem_ring(void)
3848{
3849 int ton = 0;
3850 int i;
3851
3852 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3853 modem_info *info = &dev->mdm.info[i];
3854 if (info->msr & UART_MSR_RI) {
3855 ton = 1;
3856 isdn_tty_modem_result(RESULT_RING, info);
3857 }
3858 }
3859 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3860}
3861
3862/*
3863 * For all online tty's, try sending data to
3864 * the lower levels.
3865 */
3866void
3867isdn_tty_modem_xmit(void)
3868{
3869 int ton = 1;
3870 int i;
3871
3872 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3873 modem_info *info = &dev->mdm.info[i];
3874 if (info->online) {
3875 ton = 1;
3876 isdn_tty_senddown(info);
3877 isdn_tty_tint(info);
3878 }
3879 }
3880 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3881}
3882
3883/*
3884 * Check all channels if we have a 'no carrier' timeout.
3885 * Timeout value is set by Register S7.
3886 */
3887void
3888isdn_tty_carrier_timeout(void)
3889{
3890 int ton = 0;
3891 int i;
3892
3893 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3894 modem_info *info = &dev->mdm.info[i];
3895 if (info->dialing) {
3896 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3897 info->dialing = 0;
3898 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3899 isdn_tty_modem_hup(info, 1);
3900 }
3901 else
3902 ton = 1;
3903 }
3904 }
3905 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3906}
Linux 6.x block layer and io_uring tree(s)