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[mirror_ubuntu-jammy-kernel.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>
405f5571 16#include <linux/smp_lock.h>
1da177e4
LT		 17#include "isdn_common.h"
18#include "isdn_tty.h"
19#ifdef CONFIG_ISDN_AUDIO
20#include "isdn_audio.h"
21#define VBUF 0x3e0
22#define VBUFX (VBUF/16)
23#endif
24
25#define FIX_FILE_TRANSFER
26#define DUMMY_HAYES_AT
27
28/* Prototypes */
29
30static int isdn_tty_edit_at(const char *, int, modem_info *);
31static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
32static void isdn_tty_modem_reset_regs(modem_info *, int);
33static void isdn_tty_cmd_ATA(modem_info *);
34static void isdn_tty_flush_buffer(struct tty_struct *);
35static void isdn_tty_modem_result(int, modem_info *);
36#ifdef CONFIG_ISDN_AUDIO
37static int isdn_tty_countDLE(unsigned char *, int);
38#endif
39
40/* Leave this unchanged unless you know what you do! */
41#define MODEM_PARANOIA_CHECK
42#define MODEM_DO_RESTART
43
44static int bit2si[8] =
45{1, 5, 7, 7, 7, 7, 7, 7};
46static int si2bit[8] =
47{4, 1, 4, 4, 4, 4, 4, 4};
48
49char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
50
51
52/* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
53 * to stuff incoming data directly into a tty's flip-buffer. This
54 * is done to speed up tty-receiving if the receive-queue is empty.
55 * This routine MUST be called with interrupts off.
56 * Return:
57 * 1 = Success
58 * 0 = Failure, data has to be buffered and later processed by
59 * isdn_tty_readmodem().
60 */
61static int
62isdn_tty_try_read(modem_info * info, struct sk_buff *skb)
63{
64 int c;
65 int len;
66 struct tty_struct *tty;
33f0f88f 67 char last;
1da177e4
LT		 68
69 if (info->online) {
70 if ((tty = info->tty)) {
71 if (info->mcr & UART_MCR_RTS) {
1da177e4
LT		 72 len = skb->len
73#ifdef CONFIG_ISDN_AUDIO
74 + ISDN_AUDIO_SKB_DLECOUNT(skb)
75#endif
76 ;
33f0f88f
AC		 77
78 c = tty_buffer_request_room(tty, len);
1da177e4
LT		 79 if (c >= len) {
80#ifdef CONFIG_ISDN_AUDIO
33f0f88f
AC		 81 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
82 int l = skb->len;
83 unsigned char *dp = skb->data;
84 while (--l) {
ca6f8792 85 if (*dp == DLE)
1da177e4 86 tty_insert_flip_char(tty, DLE, 0);
33f0f88f
AC		 87 tty_insert_flip_char(tty, *dp++, 0);
88 }
7fde4d77
MG		 89 if (*dp == DLE)
90 tty_insert_flip_char(tty, DLE, 0);
33f0f88f 91 last = *dp;
1da177e4
LT		 92 } else {
93#endif
33f0f88f
AC		 94 if(len > 1)
95 tty_insert_flip_string(tty, skb->data, len - 1);
96 last = skb->data[len - 1];
1da177e4
LT		 97#ifdef CONFIG_ISDN_AUDIO
98 }
99#endif
100 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
33f0f88f
AC		 101 tty_insert_flip_char(tty, last, 0xFF);
102 else
103 tty_insert_flip_char(tty, last, TTY_NORMAL);
104 tty_flip_buffer_push(tty);
1da177e4
LT		 105 kfree_skb(skb);
106 return 1;
107 }
108 }
109 }
110 }
111 return 0;
112}
113
114/* isdn_tty_readmodem() is called periodically from within timer-interrupt.
115 * It tries getting received data from the receive queue an stuff it into
116 * the tty's flip-buffer.
117 */
118void
119isdn_tty_readmodem(void)
120{
121 int resched = 0;
122 int midx;
123 int i;
1da177e4
LT		 124 int r;
125 struct tty_struct *tty;
126 modem_info *info;
127
128 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
129 if ((midx = dev->m_idx[i]) >= 0) {
130 info = &dev->mdm.info[midx];
131 if (info->online) {
132 r = 0;
133#ifdef CONFIG_ISDN_AUDIO
134 isdn_audio_eval_dtmf(info);
135 if ((info->vonline & 1) && (info->emu.vpar[1]))
136 isdn_audio_eval_silence(info);
137#endif
138 if ((tty = info->tty)) {
139 if (info->mcr & UART_MCR_RTS) {
33f0f88f
AC		 140 /* CISCO AsyncPPP Hack */
141 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
142 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
143 else
144 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
145 if (r)
146 tty_flip_buffer_push(tty);
1da177e4
LT		 147 } else
148 r = 1;
149 } else
150 r = 1;
151 if (r) {
152 info->rcvsched = 0;
153 resched = 1;
154 } else
155 info->rcvsched = 1;
156 }
157 }
158 }
159 if (!resched)
160 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
161}
162
163int
164isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
165{
166 ulong flags;
167 int midx;
168#ifdef CONFIG_ISDN_AUDIO
169 int ifmt;
170#endif
171 modem_info *info;
172
173 if ((midx = dev->m_idx[i]) < 0) {
174 /* if midx is invalid, packet is not for tty */
175 return 0;
176 }
177 info = &dev->mdm.info[midx];
178#ifdef CONFIG_ISDN_AUDIO
179 ifmt = 1;
180
181 if ((info->vonline) && (!info->emu.vpar[4]))
182 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
183 if ((info->vonline & 1) && (info->emu.vpar[1]))
184 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
185#endif
186 if ((info->online < 2)
187#ifdef CONFIG_ISDN_AUDIO
188 && (!(info->vonline & 1))
189#endif
190 ) {
191 /* If Modem not listening, drop data */
192 kfree_skb(skb);
193 return 1;
194 }
195 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
196 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
197 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
198 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
199 skb_pull(skb, 4);
200 else
201 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
202 skb_pull(skb, 2);
203 } else
204 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
205 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
206 skb_pull(skb, 4);
207 }
208#ifdef CONFIG_ISDN_AUDIO
209 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
210 ISDN_AUDIO_SKB_LOCK(skb) = 0;
211 if (info->vonline & 1) {
212 /* voice conversion/compression */
213 switch (info->emu.vpar[3]) {
214 case 2:
215 case 3:
216 case 4:
217 /* adpcm
218 * Since compressed data takes less
219 * space, we can overwrite the buffer.
220 */
221 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
222 ifmt,
223 skb->data,
224 skb->data,
225 skb->len));
226 break;
227 case 5:
228 /* a-law */
229 if (!ifmt)
230 isdn_audio_ulaw2alaw(skb->data, skb->len);
231 break;
232 case 6:
233 /* u-law */
234 if (ifmt)
235 isdn_audio_alaw2ulaw(skb->data, skb->len);
236 break;
237 }
238 ISDN_AUDIO_SKB_DLECOUNT(skb) =
239 isdn_tty_countDLE(skb->data, skb->len);
240 }
241#ifdef CONFIG_ISDN_TTY_FAX
242 else {
243 if (info->faxonline & 2) {
244 isdn_tty_fax_bitorder(info, skb);
245 ISDN_AUDIO_SKB_DLECOUNT(skb) =
246 isdn_tty_countDLE(skb->data, skb->len);
247 }
248 }
249#endif
250#endif
33f0f88f 251 /* Try to deliver directly via tty-buf if queue is empty */
1da177e4
LT		 252 spin_lock_irqsave(&info->readlock, flags);
253 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
254 if (isdn_tty_try_read(info, skb)) {
255 spin_unlock_irqrestore(&info->readlock, flags);
256 return 1;
257 }
258 /* Direct deliver failed or queue wasn't empty.
259 * Queue up for later dequeueing via timer-irq.
260 */
261 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
262 dev->drv[di]->rcvcount[channel] +=
263 (skb->len
264#ifdef CONFIG_ISDN_AUDIO
265 + ISDN_AUDIO_SKB_DLECOUNT(skb)
266#endif
267 );
268 spin_unlock_irqrestore(&info->readlock, flags);
269 /* Schedule dequeuing */
270 if ((dev->modempoll) && (info->rcvsched))
271 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
272 return 1;
273}
274
3e206b0a 275static void
1da177e4
LT		 276isdn_tty_cleanup_xmit(modem_info * info)
277{
278 skb_queue_purge(&info->xmit_queue);
279#ifdef CONFIG_ISDN_AUDIO
280 skb_queue_purge(&info->dtmf_queue);
281#endif
282}
283
284static void
285isdn_tty_tint(modem_info * info)
286{
287 struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
288 int len, slen;
289
290 if (!skb)
291 return;
292 len = skb->len;
293 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
294 info->isdn_channel, 1, skb)) == len) {
295 struct tty_struct *tty = info->tty;
296 info->send_outstanding++;
297 info->msr &= ~UART_MSR_CTS;
298 info->lsr &= ~UART_LSR_TEMT;
299 tty_wakeup(tty);
300 return;
301 }
302 if (slen < 0) {
303 /* Error: no channel, already shutdown, or wrong parameter */
304 dev_kfree_skb(skb);
305 return;
306 }
307 skb_queue_head(&info->xmit_queue, skb);
308}
309
310#ifdef CONFIG_ISDN_AUDIO
311static int
312isdn_tty_countDLE(unsigned char *buf, int len)
313{
314 int count = 0;
315
316 while (len--)
317 if (*buf++ == DLE)
318 count++;
319 return count;
320}
321
322/* This routine is called from within isdn_tty_write() to perform
323 * DLE-decoding when sending audio-data.
324 */
325static int
326isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
327{
328 unsigned char *p = &info->xmit_buf[info->xmit_count];
329 int count = 0;
330
331 while (len > 0) {
332 if (m->lastDLE) {
333 m->lastDLE = 0;
334 switch (*p) {
335 case DLE:
336 /* Escape code */
337 if (len > 1)
338 memmove(p, p + 1, len - 1);
339 p--;
340 count++;
341 break;
342 case ETX:
343 /* End of data */
344 info->vonline |= 4;
345 return count;
346 case DC4:
347 /* Abort RX */
348 info->vonline &= ~1;
349#ifdef ISDN_DEBUG_MODEM_VOICE
350 printk(KERN_DEBUG
351 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
352 info->line);
353#endif
354 isdn_tty_at_cout("\020\003", info);
355 if (!info->vonline) {
356#ifdef ISDN_DEBUG_MODEM_VOICE
357 printk(KERN_DEBUG
358 "DLEdown: send VCON on ttyI%d\n",
359 info->line);
360#endif
361 isdn_tty_at_cout("\r\nVCON\r\n", info);
362 }
363 /* Fall through */
364 case 'q':
365 case 's':
366 /* Silence */
367 if (len > 1)
368 memmove(p, p + 1, len - 1);
369 p--;
370 break;
371 }
372 } else {
373 if (*p == DLE)
374 m->lastDLE = 1;
375 else
376 count++;
377 }
378 p++;
379 len--;
380 }
381 if (len < 0) {
382 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
383 return 0;
384 }
385 return count;
386}
387
388/* This routine is called from within isdn_tty_write() when receiving
389 * audio-data. It interrupts receiving, if an character other than
390 * ^S or ^Q is sent.
391 */
392static int
393isdn_tty_end_vrx(const char *buf, int c)
394{
395 char ch;
396
397 while (c--) {
398 ch = *buf;
399 if ((ch != 0x11) && (ch != 0x13))
400 return 1;
401 buf++;
402 }
403 return 0;
404}
405
406static int voice_cf[7] =
407{0, 0, 4, 3, 2, 0, 0};
408
409#endif /* CONFIG_ISDN_AUDIO */
410
411/* isdn_tty_senddown() is called either directly from within isdn_tty_write()
412 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
413 * outgoing data from the tty's xmit-buffer, handles voice-decompression or
414 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
415 */
416static void
417isdn_tty_senddown(modem_info * info)
418{
419 int buflen;
420 int skb_res;
421#ifdef CONFIG_ISDN_AUDIO
422 int audio_len;
423#endif
424 struct sk_buff *skb;
425
426#ifdef CONFIG_ISDN_AUDIO
427 if (info->vonline & 4) {
428 info->vonline &= ~6;
429 if (!info->vonline) {
430#ifdef ISDN_DEBUG_MODEM_VOICE
431 printk(KERN_DEBUG
432 "senddown: send VCON on ttyI%d\n",
433 info->line);
434#endif
435 isdn_tty_at_cout("\r\nVCON\r\n", info);
436 }
437 }
438#endif
439 if (!(buflen = info->xmit_count))
440 return;
441 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
442 info->msr &= ~UART_MSR_CTS;
443 info->lsr &= ~UART_LSR_TEMT;
444 /* info->xmit_count is modified here and in isdn_tty_write().
445 * So we return here if isdn_tty_write() is in the
446 * critical section.
447 */
448 atomic_inc(&info->xmit_lock);
449 if (!(atomic_dec_and_test(&info->xmit_lock)))
450 return;
451 if (info->isdn_driver < 0) {
452 info->xmit_count = 0;
453 return;
454 }
455 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
456#ifdef CONFIG_ISDN_AUDIO
457 if (info->vonline & 2)
458 audio_len = buflen * voice_cf[info->emu.vpar[3]];
459 else
460 audio_len = 0;
461 skb = dev_alloc_skb(skb_res + buflen + audio_len);
462#else
463 skb = dev_alloc_skb(skb_res + buflen);
464#endif
465 if (!skb) {
466 printk(KERN_WARNING
467 "isdn_tty: Out of memory in ttyI%d senddown\n",
468 info->line);
469 return;
470 }
471 skb_reserve(skb, skb_res);
472 memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
473 info->xmit_count = 0;
474#ifdef CONFIG_ISDN_AUDIO
475 if (info->vonline & 2) {
476 /* For now, ifmt is fixed to 1 (alaw), since this
477 * is used with ISDN everywhere in the world, except
478 * US, Canada and Japan.
479 * Later, when US-ISDN protocols are implemented,
480 * this setting will depend on the D-channel protocol.
481 */
482 int ifmt = 1;
483
484 /* voice conversion/decompression */
485 switch (info->emu.vpar[3]) {
486 case 2:
487 case 3:
488 case 4:
489 /* adpcm, compatible to ZyXel 1496 modem
490 * with ROM revision 6.01
491 */
492 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
493 ifmt,
494 skb->data,
495 skb_put(skb, audio_len),
496 buflen);
497 skb_pull(skb, buflen);
498 skb_trim(skb, audio_len);
499 break;
500 case 5:
501 /* a-law */
502 if (!ifmt)
503 isdn_audio_alaw2ulaw(skb->data,
504 buflen);
505 break;
506 case 6:
507 /* u-law */
508 if (ifmt)
509 isdn_audio_ulaw2alaw(skb->data,
510 buflen);
511 break;
512 }
513 }
514#endif /* CONFIG_ISDN_AUDIO */
515 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
516 /* Add T.70 simplified header */
517 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
518 memcpy(skb_push(skb, 2), "\1\0", 2);
519 else
520 memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
521 }
522 skb_queue_tail(&info->xmit_queue, skb);
523}
524
525/************************************************************
526 *
527 * Modem-functions
528 *
529 * mostly "stolen" from original Linux-serial.c and friends.
530 *
531 ************************************************************/
532
533/* The next routine is called once from within timer-interrupt
534 * triggered within isdn_tty_modem_ncarrier(). It calls
535 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
33f0f88f 536 * into the tty's buffer.
1da177e4
LT		 537 */
538static void
539isdn_tty_modem_do_ncarrier(unsigned long data)
540{
541 modem_info *info = (modem_info *) data;
542 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
543}
544
545/* Next routine is called, whenever the DTR-signal is raised.
546 * It checks the ncarrier-flag, and triggers the above routine
547 * when necessary. The ncarrier-flag is set, whenever DTR goes
548 * low.
549 */
550static void
551isdn_tty_modem_ncarrier(modem_info * info)
552{
553 if (info->ncarrier) {
554 info->nc_timer.expires = jiffies + HZ;
555 add_timer(&info->nc_timer);
556 }
557}
558
559/*
560 * return the usage calculated by si and layer 2 protocol
561 */
3e206b0a 562static int
1da177e4
LT		 563isdn_calc_usage(int si, int l2)
564{
565 int usg = ISDN_USAGE_MODEM;
566
567#ifdef CONFIG_ISDN_AUDIO
568 if (si == 1) {
569 switch(l2) {
570 case ISDN_PROTO_L2_MODEM:
571 usg = ISDN_USAGE_MODEM;
572 break;
573#ifdef CONFIG_ISDN_TTY_FAX
574 case ISDN_PROTO_L2_FAX:
575 usg = ISDN_USAGE_FAX;
576 break;
577#endif
578 case ISDN_PROTO_L2_TRANS:
579 default:
580 usg = ISDN_USAGE_VOICE;
581 break;
582 }
583 }
584#endif
585 return(usg);
586}
587
588/* isdn_tty_dial() performs dialing of a tty an the necessary
589 * setup of the lower levels before that.
590 */
591static void
592isdn_tty_dial(char *n, modem_info * info, atemu * m)
593{
594 int usg = ISDN_USAGE_MODEM;
595 int si = 7;
596 int l2 = m->mdmreg[REG_L2PROT];
597 u_long flags;
598 isdn_ctrl cmd;
599 int i;
600 int j;
601
602 for (j = 7; j >= 0; j--)
603 if (m->mdmreg[REG_SI1] & (1 << j)) {
604 si = bit2si[j];
605 break;
606 }
607 usg = isdn_calc_usage(si, l2);
608#ifdef CONFIG_ISDN_AUDIO
609 if ((si == 1) &&
610 (l2 != ISDN_PROTO_L2_MODEM)
611#ifdef CONFIG_ISDN_TTY_FAX
612 && (l2 != ISDN_PROTO_L2_FAX)
613#endif
614 ) {
615 l2 = ISDN_PROTO_L2_TRANS;
616 usg = ISDN_USAGE_VOICE;
617 }
618#endif
619 m->mdmreg[REG_SI1I] = si2bit[si];
620 spin_lock_irqsave(&dev->lock, flags);
621 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
622 if (i < 0) {
623 spin_unlock_irqrestore(&dev->lock, flags);
624 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
625 } else {
626 info->isdn_driver = dev->drvmap[i];
627 info->isdn_channel = dev->chanmap[i];
628 info->drv_index = i;
629 dev->m_idx[i] = info->line;
630 dev->usage[i] |= ISDN_USAGE_OUTGOING;
631 info->last_dir = 1;
632 strcpy(info->last_num, n);
633 isdn_info_update();
634 spin_unlock_irqrestore(&dev->lock, flags);
635 cmd.driver = info->isdn_driver;
636 cmd.arg = info->isdn_channel;
637 cmd.command = ISDN_CMD_CLREAZ;
638 isdn_command(&cmd);
639 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
640 cmd.driver = info->isdn_driver;
641 cmd.command = ISDN_CMD_SETEAZ;
642 isdn_command(&cmd);
643 cmd.driver = info->isdn_driver;
644 cmd.command = ISDN_CMD_SETL2;
645 info->last_l2 = l2;
646 cmd.arg = info->isdn_channel + (l2 << 8);
647 isdn_command(&cmd);
648 cmd.driver = info->isdn_driver;
649 cmd.command = ISDN_CMD_SETL3;
650 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
651#ifdef CONFIG_ISDN_TTY_FAX
652 if (l2 == ISDN_PROTO_L2_FAX) {
653 cmd.parm.fax = info->fax;
654 info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
655 }
656#endif
657 isdn_command(&cmd);
658 cmd.driver = info->isdn_driver;
659 cmd.arg = info->isdn_channel;
660 sprintf(cmd.parm.setup.phone, "%s", n);
661 sprintf(cmd.parm.setup.eazmsn, "%s",
662 isdn_map_eaz2msn(m->msn, info->isdn_driver));
663 cmd.parm.setup.si1 = si;
664 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
665 cmd.command = ISDN_CMD_DIAL;
666 info->dialing = 1;
667 info->emu.carrierwait = 0;
668 strcpy(dev->num[i], n);
669 isdn_info_update();
670 isdn_command(&cmd);
671 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
672 }
673}
674
675/* isdn_tty_hangup() disassociates a tty from the real
676 * ISDN-line (hangup). The usage-status is cleared
677 * and some cleanup is done also.
678 */
679void
680isdn_tty_modem_hup(modem_info * info, int local)
681{
682 isdn_ctrl cmd;
683 int di, ch;
684
685 if (!info)
686 return;
687
688 di = info->isdn_driver;
689 ch = info->isdn_channel;
690 if (di < 0 || ch < 0)
691 return;
692
693 info->isdn_driver = -1;
694 info->isdn_channel = -1;
695
696#ifdef ISDN_DEBUG_MODEM_HUP
697 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
698#endif
699 info->rcvsched = 0;
700 isdn_tty_flush_buffer(info->tty);
701 if (info->online) {
702 info->last_lhup = local;
703 info->online = 0;
704 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
705 }
706#ifdef CONFIG_ISDN_AUDIO
707 info->vonline = 0;
708#ifdef CONFIG_ISDN_TTY_FAX
709 info->faxonline = 0;
710 info->fax->phase = ISDN_FAX_PHASE_IDLE;
711#endif
712 info->emu.vpar[4] = 0;
713 info->emu.vpar[5] = 8;
3c7208f2
JJ		 714 kfree(info->dtmf_state);
715 info->dtmf_state = NULL;
716 kfree(info->silence_state);
717 info->silence_state = NULL;
718 kfree(info->adpcms);
719 info->adpcms = NULL;
720 kfree(info->adpcmr);
721 info->adpcmr = NULL;
1da177e4
LT		 722#endif
723 if ((info->msr & UART_MSR_RI) &&
724 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
725 isdn_tty_modem_result(RESULT_RUNG, info);
726 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
727 info->lsr |= UART_LSR_TEMT;
728
729 if (local) {
730 cmd.driver = di;
731 cmd.command = ISDN_CMD_HANGUP;
732 cmd.arg = ch;
733 isdn_command(&cmd);
734 }
735
736 isdn_all_eaz(di, ch);
737 info->emu.mdmreg[REG_RINGCNT] = 0;
738 isdn_free_channel(di, ch, 0);
739
740 if (info->drv_index >= 0) {
741 dev->m_idx[info->drv_index] = -1;
742 info->drv_index = -1;
743 }
744}
745
746/*
747 * Begin of a CAPI like interface, currently used only for
748 * supplementary service (CAPI 2.0 part III)
749 */
750#include <linux/isdn/capicmd.h>
751
752int
753isdn_tty_capi_facility(capi_msg *cm) {
754 return(-1); /* dummy */
755}
756
757/* isdn_tty_suspend() tries to suspend the current tty connection
758 */
759static void
760isdn_tty_suspend(char *id, modem_info * info, atemu * m)
761{
762 isdn_ctrl cmd;
763
764 int l;
765
766 if (!info)
767 return;
768
769#ifdef ISDN_DEBUG_MODEM_SERVICES
770 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
771#endif
772 l = strlen(id);
773 if ((info->isdn_driver >= 0)) {
774 cmd.parm.cmsg.Length = l+18;
775 cmd.parm.cmsg.Command = CAPI_FACILITY;
776 cmd.parm.cmsg.Subcommand = CAPI_REQ;
777 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
778 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
779 cmd.parm.cmsg.para[1] = 0;
780 cmd.parm.cmsg.para[2] = l + 3;
781 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
782 cmd.parm.cmsg.para[4] = 0;
783 cmd.parm.cmsg.para[5] = l;
784 strncpy(&cmd.parm.cmsg.para[6], id, l);
785 cmd.command = CAPI_PUT_MESSAGE;
786 cmd.driver = info->isdn_driver;
787 cmd.arg = info->isdn_channel;
788 isdn_command(&cmd);
789 }
790}
791
792/* isdn_tty_resume() tries to resume a suspended call
793 * setup of the lower levels before that. unfortunatly here is no
794 * checking for compatibility of used protocols implemented by Q931
795 * It does the same things like isdn_tty_dial, the last command
796 * is different, may be we can merge it.
797 */
798
799static void
800isdn_tty_resume(char *id, modem_info * info, atemu * m)
801{
802 int usg = ISDN_USAGE_MODEM;
803 int si = 7;
804 int l2 = m->mdmreg[REG_L2PROT];
805 isdn_ctrl cmd;
806 ulong flags;
807 int i;
808 int j;
809 int l;
810
811 l = strlen(id);
812 for (j = 7; j >= 0; j--)
813 if (m->mdmreg[REG_SI1] & (1 << j)) {
814 si = bit2si[j];
815 break;
816 }
817 usg = isdn_calc_usage(si, l2);
818#ifdef CONFIG_ISDN_AUDIO
819 if ((si == 1) &&
820 (l2 != ISDN_PROTO_L2_MODEM)
821#ifdef CONFIG_ISDN_TTY_FAX
822 && (l2 != ISDN_PROTO_L2_FAX)
823#endif
824 ) {
825 l2 = ISDN_PROTO_L2_TRANS;
826 usg = ISDN_USAGE_VOICE;
827 }
828#endif
829 m->mdmreg[REG_SI1I] = si2bit[si];
830 spin_lock_irqsave(&dev->lock, flags);
831 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
832 if (i < 0) {
833 spin_unlock_irqrestore(&dev->lock, flags);
834 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
835 } else {
836 info->isdn_driver = dev->drvmap[i];
837 info->isdn_channel = dev->chanmap[i];
838 info->drv_index = i;
839 dev->m_idx[i] = info->line;
840 dev->usage[i] |= ISDN_USAGE_OUTGOING;
841 info->last_dir = 1;
842// strcpy(info->last_num, n);
843 isdn_info_update();
844 spin_unlock_irqrestore(&dev->lock, flags);
845 cmd.driver = info->isdn_driver;
846 cmd.arg = info->isdn_channel;
847 cmd.command = ISDN_CMD_CLREAZ;
848 isdn_command(&cmd);
849 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
850 cmd.driver = info->isdn_driver;
851 cmd.command = ISDN_CMD_SETEAZ;
852 isdn_command(&cmd);
853 cmd.driver = info->isdn_driver;
854 cmd.command = ISDN_CMD_SETL2;
855 info->last_l2 = l2;
856 cmd.arg = info->isdn_channel + (l2 << 8);
857 isdn_command(&cmd);
858 cmd.driver = info->isdn_driver;
859 cmd.command = ISDN_CMD_SETL3;
860 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
861 isdn_command(&cmd);
862 cmd.driver = info->isdn_driver;
863 cmd.arg = info->isdn_channel;
864 cmd.parm.cmsg.Length = l+18;
865 cmd.parm.cmsg.Command = CAPI_FACILITY;
866 cmd.parm.cmsg.Subcommand = CAPI_REQ;
867 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
868 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
869 cmd.parm.cmsg.para[1] = 0;
870 cmd.parm.cmsg.para[2] = l+3;
871 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
872 cmd.parm.cmsg.para[4] = 0;
873 cmd.parm.cmsg.para[5] = l;
874 strncpy(&cmd.parm.cmsg.para[6], id, l);
875 cmd.command =CAPI_PUT_MESSAGE;
876 info->dialing = 1;
877// strcpy(dev->num[i], n);
878 isdn_info_update();
879 isdn_command(&cmd);
880 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
881 }
882}
883
884/* isdn_tty_send_msg() sends a message to a HL driver
885 * This is used for hybrid modem cards to send AT commands to it
886 */
887
888static void
889isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
890{
891 int usg = ISDN_USAGE_MODEM;
892 int si = 7;
893 int l2 = m->mdmreg[REG_L2PROT];
894 isdn_ctrl cmd;
895 ulong flags;
896 int i;
897 int j;
898 int l;
899
900 l = strlen(msg);
901 if (!l) {
902 isdn_tty_modem_result(RESULT_ERROR, info);
903 return;
904 }
905 for (j = 7; j >= 0; j--)
906 if (m->mdmreg[REG_SI1] & (1 << j)) {
907 si = bit2si[j];
908 break;
909 }
910 usg = isdn_calc_usage(si, l2);
911#ifdef CONFIG_ISDN_AUDIO
912 if ((si == 1) &&
913 (l2 != ISDN_PROTO_L2_MODEM)
914#ifdef CONFIG_ISDN_TTY_FAX
915 && (l2 != ISDN_PROTO_L2_FAX)
916#endif
917 ) {
918 l2 = ISDN_PROTO_L2_TRANS;
919 usg = ISDN_USAGE_VOICE;
920 }
921#endif
922 m->mdmreg[REG_SI1I] = si2bit[si];
923 spin_lock_irqsave(&dev->lock, flags);
924 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
925 if (i < 0) {
926 spin_unlock_irqrestore(&dev->lock, flags);
927 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
928 } else {
929 info->isdn_driver = dev->drvmap[i];
930 info->isdn_channel = dev->chanmap[i];
931 info->drv_index = i;
932 dev->m_idx[i] = info->line;
933 dev->usage[i] |= ISDN_USAGE_OUTGOING;
934 info->last_dir = 1;
935 isdn_info_update();
936 spin_unlock_irqrestore(&dev->lock, flags);
937 cmd.driver = info->isdn_driver;
938 cmd.arg = info->isdn_channel;
939 cmd.command = ISDN_CMD_CLREAZ;
940 isdn_command(&cmd);
941 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
942 cmd.driver = info->isdn_driver;
943 cmd.command = ISDN_CMD_SETEAZ;
944 isdn_command(&cmd);
945 cmd.driver = info->isdn_driver;
946 cmd.command = ISDN_CMD_SETL2;
947 info->last_l2 = l2;
948 cmd.arg = info->isdn_channel + (l2 << 8);
949 isdn_command(&cmd);
950 cmd.driver = info->isdn_driver;
951 cmd.command = ISDN_CMD_SETL3;
952 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
953 isdn_command(&cmd);
954 cmd.driver = info->isdn_driver;
955 cmd.arg = info->isdn_channel;
956 cmd.parm.cmsg.Length = l+14;
957 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
958 cmd.parm.cmsg.Subcommand = CAPI_REQ;
959 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
960 cmd.parm.cmsg.para[0] = l+1;
961 strncpy(&cmd.parm.cmsg.para[1], msg, l);
962 cmd.parm.cmsg.para[l+1] = 0xd;
963 cmd.command =CAPI_PUT_MESSAGE;
964/* info->dialing = 1;
965 strcpy(dev->num[i], n);
966 isdn_info_update();
967*/
968 isdn_command(&cmd);
969 }
970}
971
972static inline int
973isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
974{
975#ifdef MODEM_PARANOIA_CHECK
976 if (!info) {
977 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
978 name, routine);
979 return 1;
980 }
981 if (info->magic != ISDN_ASYNC_MAGIC) {
982 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
983 name, routine);
984 return 1;
985 }
986#endif
987 return 0;
988}
989
990/*
991 * This routine is called to set the UART divisor registers to match
992 * the specified baud rate for a serial port.
993 */
994static void
995isdn_tty_change_speed(modem_info * info)
996{
997 uint cflag,
998 cval,
999 fcr,
1000 quot;
1001 int i;
1002
1003 if (!info->tty || !info->tty->termios)
1004 return;
1005 cflag = info->tty->termios->c_cflag;
1006
1007 quot = i = cflag & CBAUD;
1008 if (i & CBAUDEX) {
1009 i &= ~CBAUDEX;
1010 if (i < 1 || i > 2)
1011 info->tty->termios->c_cflag &= ~CBAUDEX;
1012 else
1013 i += 15;
1014 }
1015 if (quot) {
1016 info->mcr |= UART_MCR_DTR;
1017 isdn_tty_modem_ncarrier(info);
1018 } else {
1019 info->mcr &= ~UART_MCR_DTR;
1020 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1021#ifdef ISDN_DEBUG_MODEM_HUP
1022 printk(KERN_DEBUG "Mhup in changespeed\n");
1023#endif
1024 if (info->online)
1025 info->ncarrier = 1;
1026 isdn_tty_modem_reset_regs(info, 0);
1027 isdn_tty_modem_hup(info, 1);
1028 }
1029 return;
1030 }
1031 /* byte size and parity */
1032 cval = cflag & (CSIZE | CSTOPB);
1033 cval >>= 4;
1034 if (cflag & PARENB)
1035 cval |= UART_LCR_PARITY;
1036 if (!(cflag & PARODD))
1037 cval |= UART_LCR_EPAR;
1038 fcr = 0;
1039
1040 /* CTS flow control flag and modem status interrupts */
1041 if (cflag & CRTSCTS) {
1042 info->flags |= ISDN_ASYNC_CTS_FLOW;
1043 } else
1044 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1045 if (cflag & CLOCAL)
1046 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1047 else {
1048 info->flags |= ISDN_ASYNC_CHECK_CD;
1049 }
1050}
1051
1052static int
1053isdn_tty_startup(modem_info * info)
1054{
1055 if (info->flags & ISDN_ASYNC_INITIALIZED)
1056 return 0;
1057 isdn_lock_drivers();
1058#ifdef ISDN_DEBUG_MODEM_OPEN
1059 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1060#endif
1061 /*
1062 * Now, initialize the UART
1063 */
1064 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1065 if (info->tty)
1066 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1067 /*
1068 * and set the speed of the serial port
1069 */
1070 isdn_tty_change_speed(info);
1071
1072 info->flags |= ISDN_ASYNC_INITIALIZED;
1073 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1074 info->send_outstanding = 0;
1075 return 0;
1076}
1077
1078/*
1079 * This routine will shutdown a serial port; interrupts are disabled, and
1080 * DTR is dropped if the hangup on close termio flag is on.
1081 */
1082static void
1083isdn_tty_shutdown(modem_info * info)
1084{
1085 if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1086 return;
1087#ifdef ISDN_DEBUG_MODEM_OPEN
1088 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1089#endif
1090 isdn_unlock_drivers();
1091 info->msr &= ~UART_MSR_RI;
1092 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1093 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1094 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1095 isdn_tty_modem_reset_regs(info, 0);
1096#ifdef ISDN_DEBUG_MODEM_HUP
1097 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1098#endif
1099 isdn_tty_modem_hup(info, 1);
1100 }
1101 }
1102 if (info->tty)
1103 set_bit(TTY_IO_ERROR, &info->tty->flags);
1104
1105 info->flags &= ~ISDN_ASYNC_INITIALIZED;
1106}
1107
1108/* isdn_tty_write() is the main send-routine. It is called from the upper
1109 * levels within the kernel to perform sending data. Depending on the
1110 * online-flag it either directs output to the at-command-interpreter or
1111 * to the lower level. Additional tasks done here:
1112 * - If online, check for escape-sequence (+++)
1113 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1114 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1115 * - If dialing, abort dial.
1116 */
1117static int
1118isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
1119{
1120 int c;
1121 int total = 0;
1122 modem_info *info = (modem_info *) tty->driver_data;
1123 atemu *m = &info->emu;
1124
1125 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1126 return 0;
1127 /* See isdn_tty_senddown() */
1128 atomic_inc(&info->xmit_lock);
1129 while (1) {
1130 c = count;
1131 if (c > info->xmit_size - info->xmit_count)
1132 c = info->xmit_size - info->xmit_count;
1133 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1134 c = dev->drv[info->isdn_driver]->maxbufsize;
1135 if (c <= 0)
1136 break;
1137 if ((info->online > 1)
1138#ifdef CONFIG_ISDN_AUDIO
1139 || (info->vonline & 3)
1140#endif
1141 ) {
1142#ifdef CONFIG_ISDN_AUDIO
1143 if (!info->vonline)
1144#endif
1145 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1146 &(m->pluscount),
1147 &(m->lastplus));
1148 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1149#ifdef CONFIG_ISDN_AUDIO
1150 if (info->vonline) {
1151 int cc = isdn_tty_handleDLEdown(info, m, c);
1152 if (info->vonline & 2) {
1153 if (!cc) {
1154 /* If DLE decoding results in zero-transmit, but
1155 * c originally was non-zero, do a wakeup.
1156 */
1157 tty_wakeup(tty);
1158 info->msr |= UART_MSR_CTS;
1159 info->lsr |= UART_LSR_TEMT;
1160 }
1161 info->xmit_count += cc;
1162 }
1163 if ((info->vonline & 3) == 1) {
1164 /* Do NOT handle Ctrl-Q or Ctrl-S
1165 * when in full-duplex audio mode.
1166 */
1167 if (isdn_tty_end_vrx(buf, c)) {
1168 info->vonline &= ~1;
1169#ifdef ISDN_DEBUG_MODEM_VOICE
1170 printk(KERN_DEBUG
1171 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1172 info->line);
1173#endif
1174 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1175 }
1176 }
1177 } else
1178 if (TTY_IS_FCLASS1(info)) {
1179 int cc = isdn_tty_handleDLEdown(info, m, c);
1180
1181 if (info->vonline & 4) { /* ETX seen */
1182 isdn_ctrl c;
1183
1184 c.command = ISDN_CMD_FAXCMD;
1185 c.driver = info->isdn_driver;
1186 c.arg = info->isdn_channel;
1187 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1188 c.parm.aux.subcmd = ETX;
1189 isdn_command(&c);
1190 }
1191 info->vonline = 0;
1192#ifdef ISDN_DEBUG_MODEM_VOICE
1193 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1194#endif
1195 info->xmit_count += cc;
1196 } else
1197#endif
1198 info->xmit_count += c;
1199 } else {
1200 info->msr |= UART_MSR_CTS;
1201 info->lsr |= UART_LSR_TEMT;
1202 if (info->dialing) {
1203 info->dialing = 0;
1204#ifdef ISDN_DEBUG_MODEM_HUP
1205 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1206#endif
1207 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1208 isdn_tty_modem_hup(info, 1);
1209 } else
1210 c = isdn_tty_edit_at(buf, c, info);
1211 }
1212 buf += c;
1213 count -= c;
1214 total += c;
1215 }
1216 atomic_dec(&info->xmit_lock);
b03efcfb 1217 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1da177e4
LT		 1218 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1219 isdn_tty_senddown(info);
1220 isdn_tty_tint(info);
1221 }
1222 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1223 }
1224 return total;
1225}
1226
1227static int
1228isdn_tty_write_room(struct tty_struct *tty)
1229{
1230 modem_info *info = (modem_info *) tty->driver_data;
1231 int ret;
1232
1233 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1234 return 0;
1235 if (!info->online)
1236 return info->xmit_size;
1237 ret = info->xmit_size - info->xmit_count;
1238 return (ret < 0) ? 0 : ret;
1239}
1240
1241static int
1242isdn_tty_chars_in_buffer(struct tty_struct *tty)
1243{
1244 modem_info *info = (modem_info *) tty->driver_data;
1245
1246 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1247 return 0;
1248 if (!info->online)
1249 return 0;
1250 return (info->xmit_count);
1251}
1252
1253static void
1254isdn_tty_flush_buffer(struct tty_struct *tty)
1255{
1256 modem_info *info;
1257
1258 if (!tty) {
1259 return;
1260 }
1261 info = (modem_info *) tty->driver_data;
1262 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1263 return;
1264 }
1265 isdn_tty_cleanup_xmit(info);
1266 info->xmit_count = 0;
1da177e4
LT		 1267 tty_wakeup(tty);
1268}
1269
1270static void
1271isdn_tty_flush_chars(struct tty_struct *tty)
1272{
1273 modem_info *info = (modem_info *) tty->driver_data;
1274
1275 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1276 return;
b03efcfb 1277 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1da177e4
LT		 1278 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1279}
1280
1281/*
1282 * ------------------------------------------------------------
1283 * isdn_tty_throttle()
1284 *
1285 * This routine is called by the upper-layer tty layer to signal that
1286 * incoming characters should be throttled.
1287 * ------------------------------------------------------------
1288 */
1289static void
1290isdn_tty_throttle(struct tty_struct *tty)
1291{
1292 modem_info *info = (modem_info *) tty->driver_data;
1293
1294 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1295 return;
1296 if (I_IXOFF(tty))
1297 info->x_char = STOP_CHAR(tty);
1298 info->mcr &= ~UART_MCR_RTS;
1299}
1300
1301static void
1302isdn_tty_unthrottle(struct tty_struct *tty)
1303{
1304 modem_info *info = (modem_info *) tty->driver_data;
1305
1306 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1307 return;
1308 if (I_IXOFF(tty)) {
1309 if (info->x_char)
1310 info->x_char = 0;
1311 else
1312 info->x_char = START_CHAR(tty);
1313 }
1314 info->mcr |= UART_MCR_RTS;
1315}
1316
1317/*
1318 * ------------------------------------------------------------
1319 * isdn_tty_ioctl() and friends
1320 * ------------------------------------------------------------
1321 */
1322
1323/*
1324 * isdn_tty_get_lsr_info - get line status register info
1325 *
1326 * Purpose: Let user call ioctl() to get info when the UART physically
1327 * is emptied. On bus types like RS485, the transmitter must
1328 * release the bus after transmitting. This must be done when
1329 * the transmit shift register is empty, not be done when the
1330 * transmit holding register is empty. This functionality
1331 * allows RS485 driver to be written in user space.
1332 */
1333static int
1334isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1335{
1336 u_char status;
1337 uint result;
1338
1339 status = info->lsr;
1340 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1341 return put_user(result, value);
1342}
1343
1344
1345static int
1346isdn_tty_tiocmget(struct tty_struct *tty, struct file *file)
1347{
1348 modem_info *info = (modem_info *) tty->driver_data;
1349 u_char control, status;
1350
156f1ed6 1351 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1da177e4
LT		 1352 return -ENODEV;
1353 if (tty->flags & (1 << TTY_IO_ERROR))
1354 return -EIO;
1355
6e4d376c 1356 lock_kernel();
1da177e4
LT		 1357#ifdef ISDN_DEBUG_MODEM_IOCTL
1358 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1359#endif
1360
1361 control = info->mcr;
1362 status = info->msr;
6e4d376c 1363 unlock_kernel();
1da177e4
LT		 1364 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1365 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1366 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1367 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1368 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1369 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1370}
1371
1372static int
1373isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
1374 unsigned int set, unsigned int clear)
1375{
1376 modem_info *info = (modem_info *) tty->driver_data;
1377
156f1ed6 1378 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1da177e4
LT		 1379 return -ENODEV;
1380 if (tty->flags & (1 << TTY_IO_ERROR))
1381 return -EIO;
1382
1383#ifdef ISDN_DEBUG_MODEM_IOCTL
1384 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1385#endif
1386
6e4d376c 1387 lock_kernel();
1da177e4
LT		 1388 if (set & TIOCM_RTS)
1389 info->mcr |= UART_MCR_RTS;
1390 if (set & TIOCM_DTR) {
1391 info->mcr |= UART_MCR_DTR;
1392 isdn_tty_modem_ncarrier(info);
1393 }
1394
1395 if (clear & TIOCM_RTS)
1396 info->mcr &= ~UART_MCR_RTS;
1397 if (clear & TIOCM_DTR) {
1398 info->mcr &= ~UART_MCR_DTR;
1399 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1400 isdn_tty_modem_reset_regs(info, 0);
1401#ifdef ISDN_DEBUG_MODEM_HUP
1402 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1403#endif
1404 if (info->online)
1405 info->ncarrier = 1;
1406 isdn_tty_modem_hup(info, 1);
1407 }
1408 }
6e4d376c 1409 unlock_kernel();
1da177e4
LT		 1410 return 0;
1411}
1412
1413static int
1414isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
1415 uint cmd, ulong arg)
1416{
1417 modem_info *info = (modem_info *) tty->driver_data;
1418 int retval;
1419
1420 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1421 return -ENODEV;
1422 if (tty->flags & (1 << TTY_IO_ERROR))
1423 return -EIO;
1424 switch (cmd) {
1425 case TCSBRK: /* SVID version: non-zero arg --> no break */
1426#ifdef ISDN_DEBUG_MODEM_IOCTL
1427 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1428#endif
1429 retval = tty_check_change(tty);
1430 if (retval)
1431 return retval;
1432 tty_wait_until_sent(tty, 0);
1433 return 0;
1434 case TCSBRKP: /* support for POSIX tcsendbreak() */
1435#ifdef ISDN_DEBUG_MODEM_IOCTL
1436 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1437#endif
1438 retval = tty_check_change(tty);
1439 if (retval)
1440 return retval;
1441 tty_wait_until_sent(tty, 0);
1442 return 0;
1da177e4
LT		 1443 case TIOCSERGETLSR: /* Get line status register */
1444#ifdef ISDN_DEBUG_MODEM_IOCTL
1445 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1446#endif
1447 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1448 default:
1449#ifdef ISDN_DEBUG_MODEM_IOCTL
1450 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1451#endif
1452 return -ENOIOCTLCMD;
1453 }
1454 return 0;
1455}
1456
1457static void
606d099c 1458isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4
LT		 1459{
1460 modem_info *info = (modem_info *) tty->driver_data;
1461
1462 if (!old_termios)
1463 isdn_tty_change_speed(info);
1464 else {
6e4d376c
AC		 1465 if (tty->termios->c_cflag == old_termios->c_cflag &&
1466 tty->termios->c_ispeed == old_termios->c_ispeed &&
1467 tty->termios->c_ospeed == old_termios->c_ospeed)
1da177e4
LT		 1468 return;
1469 isdn_tty_change_speed(info);
1470 if ((old_termios->c_cflag & CRTSCTS) &&
6e4d376c 1471 !(tty->termios->c_cflag & CRTSCTS))
1da177e4 1472 tty->hw_stopped = 0;
1da177e4
LT		 1473 }
1474}
1475
1476/*
1477 * ------------------------------------------------------------
1478 * isdn_tty_open() and friends
1479 * ------------------------------------------------------------
1480 */
1481static int
1482isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1483{
1484 DECLARE_WAITQUEUE(wait, NULL);
1485 int do_clocal = 0;
1486 int retval;
1487
1488 /*
1489 * If the device is in the middle of being closed, then block
1490 * until it's done, and then try again.
1491 */
1492 if (tty_hung_up_p(filp) ||
1493 (info->flags & ISDN_ASYNC_CLOSING)) {
1494 if (info->flags & ISDN_ASYNC_CLOSING)
1495 interruptible_sleep_on(&info->close_wait);
1496#ifdef MODEM_DO_RESTART
1497 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1498 return -EAGAIN;
1499 else
1500 return -ERESTARTSYS;
1501#else
1502 return -EAGAIN;
1503#endif
1504 }
1505 /*
1506 * If non-blocking mode is set, then make the check up front
1507 * and then exit.
1508 */
1509 if ((filp->f_flags & O_NONBLOCK) ||
1510 (tty->flags & (1 << TTY_IO_ERROR))) {
1511 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1512 return -EBUSY;
1513 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1514 return 0;
1515 }
1516 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1517 if (info->normal_termios.c_cflag & CLOCAL)
1518 do_clocal = 1;
1519 } else {
1520 if (tty->termios->c_cflag & CLOCAL)
1521 do_clocal = 1;
1522 }
1523 /*
1524 * Block waiting for the carrier detect and the line to become
1525 * free (i.e., not in use by the callout). While we are in
1526 * this loop, info->count is dropped by one, so that
1527 * isdn_tty_close() knows when to free things. We restore it upon
1528 * exit, either normal or abnormal.
1529 */
1530 retval = 0;
1531 add_wait_queue(&info->open_wait, &wait);
1532#ifdef ISDN_DEBUG_MODEM_OPEN
1533 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1534 info->line, info->count);
1535#endif
1536 if (!(tty_hung_up_p(filp)))
1537 info->count--;
1538 info->blocked_open++;
1539 while (1) {
1540 set_current_state(TASK_INTERRUPTIBLE);
1541 if (tty_hung_up_p(filp) ||
1542 !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1543#ifdef MODEM_DO_RESTART
1544 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1545 retval = -EAGAIN;
1546 else
1547 retval = -ERESTARTSYS;
1548#else
1549 retval = -EAGAIN;
1550#endif
1551 break;
1552 }
1553 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1554 !(info->flags & ISDN_ASYNC_CLOSING) &&
1555 (do_clocal || (info->msr & UART_MSR_DCD))) {
1556 break;
1557 }
1558 if (signal_pending(current)) {
1559 retval = -ERESTARTSYS;
1560 break;
1561 }
1562#ifdef ISDN_DEBUG_MODEM_OPEN
1563 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1564 info->line, info->count);
1565#endif
1566 schedule();
1567 }
1568 current->state = TASK_RUNNING;
1569 remove_wait_queue(&info->open_wait, &wait);
1570 if (!tty_hung_up_p(filp))
1571 info->count++;
1572 info->blocked_open--;
1573#ifdef ISDN_DEBUG_MODEM_OPEN
1574 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1575 info->line, info->count);
1576#endif
1577 if (retval)
1578 return retval;
1579 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1580 return 0;
1581}
1582
1583/*
1584 * This routine is called whenever a serial port is opened. It
1585 * enables interrupts for a serial port, linking in its async structure into
1586 * the IRQ chain. It also performs the serial-specific
1587 * initialization for the tty structure.
1588 */
1589static int
1590isdn_tty_open(struct tty_struct *tty, struct file *filp)
1591{
1592 modem_info *info;
1593 int retval, line;
1594
1595 line = tty->index;
395df11f 1596 if (line < 0 || line >= ISDN_MAX_CHANNELS)
1da177e4
LT		 1597 return -ENODEV;
1598 info = &dev->mdm.info[line];
1599 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1600 return -ENODEV;
1601 if (!try_module_get(info->owner)) {
156f1ed6 1602 printk(KERN_WARNING "%s: cannot reserve module\n", __func__);
1da177e4
LT		 1603 return -ENODEV;
1604 }
1605#ifdef ISDN_DEBUG_MODEM_OPEN
1606 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1607 info->count);
1608#endif
1609 info->count++;
1610 tty->driver_data = info;
1611 info->tty = tty;
1612 /*
1613 * Start up serial port
1614 */
1615 retval = isdn_tty_startup(info);
1616 if (retval) {
1617#ifdef ISDN_DEBUG_MODEM_OPEN
1618 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1619#endif
1620 module_put(info->owner);
1621 return retval;
1622 }
1623 retval = isdn_tty_block_til_ready(tty, filp, info);
1624 if (retval) {
1625#ifdef ISDN_DEBUG_MODEM_OPEN
1626 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1627#endif
1628 module_put(info->owner);
1629 return retval;
1630 }
1631#ifdef ISDN_DEBUG_MODEM_OPEN
1632 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1633#endif
1634 dev->modempoll++;
1635#ifdef ISDN_DEBUG_MODEM_OPEN
1636 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1637#endif
1638 return 0;
1639}
1640
1641static void
1642isdn_tty_close(struct tty_struct *tty, struct file *filp)
1643{
1644 modem_info *info = (modem_info *) tty->driver_data;
1645 ulong timeout;
1646
1647 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1648 return;
1649 if (tty_hung_up_p(filp)) {
1650#ifdef ISDN_DEBUG_MODEM_OPEN
1651 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1652#endif
1653 return;
1654 }
1655 if ((tty->count == 1) && (info->count != 1)) {
1656 /*
1657 * Uh, oh. tty->count is 1, which means that the tty
1658 * structure will be freed. Info->count should always
1659 * be one in these conditions. If it's greater than
1660 * one, we've got real problems, since it means the
1661 * serial port won't be shutdown.
1662 */
1663 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1664 "info->count is %d\n", info->count);
1665 info->count = 1;
1666 }
1667 if (--info->count < 0) {
1668 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1669 info->line, info->count);
1670 info->count = 0;
1671 }
1672 if (info->count) {
1673#ifdef ISDN_DEBUG_MODEM_OPEN
1674 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1675#endif
7cb9478f 1676 module_put(info->owner);
1da177e4
LT		 1677 return;
1678 }
1679 info->flags |= ISDN_ASYNC_CLOSING;
1680 /*
1681 * Save the termios structure, since this port may have
1682 * separate termios for callout and dialin.
1683 */
1684 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1685 info->normal_termios = *tty->termios;
1686 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1687 info->callout_termios = *tty->termios;
1688
1689 tty->closing = 1;
1690 /*
1691 * At this point we stop accepting input. To do this, we
1692 * disable the receive line status interrupts, and tell the
1693 * interrupt driver to stop checking the data ready bit in the
1694 * line status register.
1695 */
1696 if (info->flags & ISDN_ASYNC_INITIALIZED) {
1697 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1698 /*
1699 * Before we drop DTR, make sure the UART transmitter
1700 * has completely drained; this is especially
1701 * important if there is a transmit FIFO!
1702 */
1703 timeout = jiffies + HZ;
1704 while (!(info->lsr & UART_LSR_TEMT)) {
24763c48 1705 schedule_timeout_interruptible(20);
1da177e4
LT		 1706 if (time_after(jiffies,timeout))
1707 break;
1708 }
1709 }
1710 dev->modempoll--;
1711 isdn_tty_shutdown(info);
978e595f 1712 isdn_tty_flush_buffer(tty);
1da177e4
LT		 1713 tty_ldisc_flush(tty);
1714 info->tty = NULL;
1715 info->ncarrier = 0;
1716 tty->closing = 0;
1717 module_put(info->owner);
1718 if (info->blocked_open) {
1719 msleep_interruptible(500);
1720 wake_up_interruptible(&info->open_wait);
1721 }
1722 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1723 wake_up_interruptible(&info->close_wait);
1724#ifdef ISDN_DEBUG_MODEM_OPEN
1725 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1726#endif
1727}
1728
1729/*
1730 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1731 */
1732static void
1733isdn_tty_hangup(struct tty_struct *tty)
1734{
1735 modem_info *info = (modem_info *) tty->driver_data;
1736
1737 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1738 return;
1739 isdn_tty_shutdown(info);
1740 info->count = 0;
1741 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1742 info->tty = NULL;
1743 wake_up_interruptible(&info->open_wait);
1744}
1745
1746/* This routine initializes all emulator-data.
1747 */
1748static void
1749isdn_tty_reset_profile(atemu * m)
1750{
1751 m->profile[0] = 0;
1752 m->profile[1] = 0;
1753 m->profile[2] = 43;
1754 m->profile[3] = 13;
1755 m->profile[4] = 10;
1756 m->profile[5] = 8;
1757 m->profile[6] = 3;
1758 m->profile[7] = 60;
1759 m->profile[8] = 2;
1760 m->profile[9] = 6;
1761 m->profile[10] = 7;
1762 m->profile[11] = 70;
1763 m->profile[12] = 0x45;
1764 m->profile[13] = 4;
1765 m->profile[14] = ISDN_PROTO_L2_X75I;
1766 m->profile[15] = ISDN_PROTO_L3_TRANS;
1767 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1768 m->profile[17] = ISDN_MODEM_WINSIZE;
1769 m->profile[18] = 4;
1770 m->profile[19] = 0;
1771 m->profile[20] = 0;
1772 m->profile[23] = 0;
1773 m->pmsn[0] = '\0';
1774 m->plmsn[0] = '\0';
1775}
1776
1777#ifdef CONFIG_ISDN_AUDIO
1778static void
1779isdn_tty_modem_reset_vpar(atemu * m)
1780{
1781 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1782 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1783 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1784 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1785 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1786 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1787}
1788#endif
1789
1790#ifdef CONFIG_ISDN_TTY_FAX
1791static void
1792isdn_tty_modem_reset_faxpar(modem_info * info)
1793{
1794 T30_s *f = info->fax;
1795
1796 f->code = 0;
1797 f->phase = ISDN_FAX_PHASE_IDLE;
1798 f->direction = 0;
1799 f->resolution = 1; /* fine */
1800 f->rate = 5; /* 14400 bit/s */
1801 f->width = 0;
1802 f->length = 0;
1803 f->compression = 0;
1804 f->ecm = 0;
1805 f->binary = 0;
1806 f->scantime = 0;
1807 memset(&f->id[0], 32, FAXIDLEN - 1);
1808 f->id[FAXIDLEN - 1] = 0;
1809 f->badlin = 0;
1810 f->badmul = 0;
1811 f->bor = 0;
1812 f->nbc = 0;
1813 f->cq = 0;
1814 f->cr = 0;
1815 f->ctcrty = 0;
1816 f->minsp = 0;
1817 f->phcto = 30;
1818 f->rel = 0;
1819 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1820 f->pollid[FAXIDLEN - 1] = 0;
1821}
1822#endif
1823
1824static void
1825isdn_tty_modem_reset_regs(modem_info * info, int force)
1826{
1827 atemu *m = &info->emu;
1828 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1829 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1830 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1831 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1832 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1833 }
1834#ifdef CONFIG_ISDN_AUDIO
1835 isdn_tty_modem_reset_vpar(m);
1836#endif
1837#ifdef CONFIG_ISDN_TTY_FAX
1838 isdn_tty_modem_reset_faxpar(info);
1839#endif
1840 m->mdmcmdl = 0;
1841}
1842
1843static void
1844modem_write_profile(atemu * m)
1845{
1846 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1847 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1848 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1849 if (dev->profd)
1850 send_sig(SIGIO, dev->profd, 1);
1851}
1852
b68e31d0 1853static const struct tty_operations modem_ops = {
1da177e4
LT		 1854 .open = isdn_tty_open,
1855 .close = isdn_tty_close,
1856 .write = isdn_tty_write,
1857 .flush_chars = isdn_tty_flush_chars,
1858 .write_room = isdn_tty_write_room,
1859 .chars_in_buffer = isdn_tty_chars_in_buffer,
1860 .flush_buffer = isdn_tty_flush_buffer,
1861 .ioctl = isdn_tty_ioctl,
1862 .throttle = isdn_tty_throttle,
1863 .unthrottle = isdn_tty_unthrottle,
1864 .set_termios = isdn_tty_set_termios,
1865 .hangup = isdn_tty_hangup,
1866 .tiocmget = isdn_tty_tiocmget,
1867 .tiocmset = isdn_tty_tiocmset,
1868};
1869
1870int
1871isdn_tty_modem_init(void)
1872{
1873 isdn_modem_t *m;
1874 int i, retval;
1875 modem_info *info;
1876
1877 m = &dev->mdm;
1878 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1879 if (!m->tty_modem)
1880 return -ENOMEM;
1881 m->tty_modem->name = "ttyI";
1da177e4
LT		 1882 m->tty_modem->major = ISDN_TTY_MAJOR;
1883 m->tty_modem->minor_start = 0;
1884 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1885 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1886 m->tty_modem->init_termios = tty_std_termios;
1887 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
331b8319 1888 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1da177e4
LT		 1889 m->tty_modem->driver_name = "isdn_tty";
1890 tty_set_operations(m->tty_modem, &modem_ops);
1891 retval = tty_register_driver(m->tty_modem);
1892 if (retval) {
1893 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1894 goto err;
1895 }
1896 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1897 info = &m->info[i];
1898#ifdef CONFIG_ISDN_TTY_FAX
1899 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1900 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1901 retval = -ENOMEM;
1902 goto err_unregister;
1903 }
1904#endif
1905#ifdef MODULE
1906 info->owner = THIS_MODULE;
1907#endif
1908 spin_lock_init(&info->readlock);
1da177e4
LT		 1909 sprintf(info->last_cause, "0000");
1910 sprintf(info->last_num, "none");
1911 info->last_dir = 0;
1912 info->last_lhup = 1;
1913 info->last_l2 = -1;
1914 info->last_si = 0;
1915 isdn_tty_reset_profile(&info->emu);
1916 isdn_tty_modem_reset_regs(info, 1);
1917 info->magic = ISDN_ASYNC_MAGIC;
1918 info->line = i;
1919 info->tty = NULL;
1920 info->x_char = 0;
1921 info->count = 0;
1922 info->blocked_open = 0;
1923 init_waitqueue_head(&info->open_wait);
1924 init_waitqueue_head(&info->close_wait);
1925 info->isdn_driver = -1;
1926 info->isdn_channel = -1;
1927 info->drv_index = -1;
1928 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1929 init_timer(&info->nc_timer);
1930 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1931 info->nc_timer.data = (unsigned long) info;
1932 skb_queue_head_init(&info->xmit_queue);
1933#ifdef CONFIG_ISDN_AUDIO
1934 skb_queue_head_init(&info->dtmf_queue);
1935#endif
1936 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1937 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1938 retval = -ENOMEM;
1939 goto err_unregister;
1940 }
1941 /* Make room for T.70 header */
1942 info->xmit_buf += 4;
1943 }
1944 return 0;
1945err_unregister:
1946 for (i--; i >= 0; i--) {
1947 info = &m->info[i];
1948#ifdef CONFIG_ISDN_TTY_FAX
1949 kfree(info->fax);
1950#endif
1951 kfree(info->xmit_buf - 4);
1952 }
1953 tty_unregister_driver(m->tty_modem);
1954 err:
1955 put_tty_driver(m->tty_modem);
1956 m->tty_modem = NULL;
1957 return retval;
1958}
1959
1960void
1961isdn_tty_exit(void)
1962{
1963 modem_info *info;
1964 int i;
1965
1966 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1967 info = &dev->mdm.info[i];
1968 isdn_tty_cleanup_xmit(info);
1969#ifdef CONFIG_ISDN_TTY_FAX
1970 kfree(info->fax);
1971#endif
1972 kfree(info->xmit_buf - 4);
1973 }
1974 tty_unregister_driver(dev->mdm.tty_modem);
1975 put_tty_driver(dev->mdm.tty_modem);
1976 dev->mdm.tty_modem = NULL;
1977}
1978
1979
1980/*
1981 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1982 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1983 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1984 */
1985
1986static int
1987isdn_tty_match_icall(char *cid, atemu *emu, int di)
1988{
1989#ifdef ISDN_DEBUG_MODEM_ICALL
1990 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1991 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1992 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1993#endif
1994 if (strlen(emu->lmsn)) {
1995 char *p = emu->lmsn;
1996 char *q;
1997 int tmp;
1998 int ret = 0;
1999
2000 while (1) {
2001 if ((q = strchr(p, ';')))
2002 *q = '\0';
2003 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2004 ret = tmp;
2005#ifdef ISDN_DEBUG_MODEM_ICALL
2006 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2007 p, isdn_map_eaz2msn(emu->msn, di), tmp);
2008#endif
2009 if (q) {
2010 *q = ';';
2011 p = q;
2012 p++;
2013 }
2014 if (!tmp)
2015 return 0;
2016 if (!q)
2017 break;
2018 }
2019 return ret;
2020 } else {
2021 int tmp;
2022 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2023#ifdef ISDN_DEBUG_MODEM_ICALL
2024 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2025 isdn_map_eaz2msn(emu->msn, di), tmp);
2026#endif
2027 return tmp;
2028 }
2029}
2030
2031/*
2032 * An incoming call-request has arrived.
2033 * Search the tty-devices for an appropriate device and bind
2034 * it to the ISDN-Channel.
2035 * Return:
2036 *
2037 * 0 = No matching device found.
2038 * 1 = A matching device found.
2039 * 3 = No match found, but eventually would match, if
2040 * CID is longer.
2041 */
2042int
2043isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2044{
2045 char *eaz;
2046 int i;
2047 int wret;
2048 int idx;
2049 int si1;
2050 int si2;
2051 char *nr;
2052 ulong flags;
2053
2054 if (!setup->phone[0]) {
2055 nr = "0";
2056 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2057 } else
2058 nr = setup->phone;
2059 si1 = (int) setup->si1;
2060 si2 = (int) setup->si2;
2061 if (!setup->eazmsn[0]) {
2062 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2063 eaz = "0";
2064 } else
2065 eaz = setup->eazmsn;
2066#ifdef ISDN_DEBUG_MODEM_ICALL
2067 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2068#endif
2069 wret = 0;
2070 spin_lock_irqsave(&dev->lock, flags);
2071 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2072 modem_info *info = &dev->mdm.info[i];
2073
2074 if (info->count == 0)
2075 continue;
2076 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
2077 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
2078 idx = isdn_dc2minor(di, ch);
2079#ifdef ISDN_DEBUG_MODEM_ICALL
2080 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2081 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2082 info->flags, info->isdn_driver, info->isdn_channel,
2083 dev->usage[idx]);
2084#endif
2085 if (
2086#ifndef FIX_FILE_TRANSFER
2087 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2088#endif
2089 (info->isdn_driver == -1) &&
2090 (info->isdn_channel == -1) &&
2091 (USG_NONE(dev->usage[idx]))) {
2092 int matchret;
2093
2094 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2095 wret = matchret;
2096 if (!matchret) { /* EAZ is matching */
2097 info->isdn_driver = di;
2098 info->isdn_channel = ch;
2099 info->drv_index = idx;
2100 dev->m_idx[idx] = info->line;
2101 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2102 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2103 strcpy(dev->num[idx], nr);
2104 strcpy(info->emu.cpn, eaz);
2105 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2106 info->emu.mdmreg[REG_PLAN] = setup->plan;
2107 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2108 isdn_info_update();
2109 spin_unlock_irqrestore(&dev->lock, flags);
2110 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2111 info->line);
2112 info->msr |= UART_MSR_RI;
2113 isdn_tty_modem_result(RESULT_RING, info);
2114 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2115 return 1;
2116 }
2117 }
2118 }
2119 }
2120 spin_unlock_irqrestore(&dev->lock, flags);
2121 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2122 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2123 return (wret == 2)?3:0;
2124}
2125
2126#define TTY_IS_ACTIVE(info) \
2127 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2128
2129int
2130isdn_tty_stat_callback(int i, isdn_ctrl *c)
2131{
2132 int mi;
2133 modem_info *info;
2134 char *e;
2135
2136 if (i < 0)
2137 return 0;
2138 if ((mi = dev->m_idx[i]) >= 0) {
2139 info = &dev->mdm.info[mi];
2140 switch (c->command) {
2141 case ISDN_STAT_CINF:
2142 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2143 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2144 if (e == (char *)c->parm.num)
2145 info->emu.charge = 0;
2146
2147 break;
2148 case ISDN_STAT_BSENT:
2149#ifdef ISDN_TTY_STAT_DEBUG
2150 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2151#endif
2152 if ((info->isdn_driver == c->driver) &&
2153 (info->isdn_channel == c->arg)) {
2154 info->msr |= UART_MSR_CTS;
2155 if (info->send_outstanding)
2156 if (!(--info->send_outstanding))
2157 info->lsr |= UART_LSR_TEMT;
2158 isdn_tty_tint(info);
2159 return 1;
2160 }
2161 break;
2162 case ISDN_STAT_CAUSE:
2163#ifdef ISDN_TTY_STAT_DEBUG
2164 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2165#endif
2166 /* Signal cause to tty-device */
2167 strncpy(info->last_cause, c->parm.num, 5);
2168 return 1;
2169 case ISDN_STAT_DISPLAY:
2170#ifdef ISDN_TTY_STAT_DEBUG
2171 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2172#endif
2173 /* Signal display to tty-device */
2174 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2175 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2176 isdn_tty_at_cout("\r\n", info);
2177 isdn_tty_at_cout("DISPLAY: ", info);
2178 isdn_tty_at_cout(c->parm.display, info);
2179 isdn_tty_at_cout("\r\n", info);
2180 }
2181 return 1;
2182 case ISDN_STAT_DCONN:
2183#ifdef ISDN_TTY_STAT_DEBUG
2184 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2185#endif
2186 if (TTY_IS_ACTIVE(info)) {
2187 if (info->dialing == 1) {
2188 info->dialing = 2;
2189 return 1;
2190 }
2191 }
2192 break;
2193 case ISDN_STAT_DHUP:
2194#ifdef ISDN_TTY_STAT_DEBUG
2195 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2196#endif
2197 if (TTY_IS_ACTIVE(info)) {
2198 if (info->dialing == 1)
2199 isdn_tty_modem_result(RESULT_BUSY, info);
2200 if (info->dialing > 1)
2201 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2202 info->dialing = 0;
2203#ifdef ISDN_DEBUG_MODEM_HUP
2204 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2205#endif
2206 isdn_tty_modem_hup(info, 0);
2207 return 1;
2208 }
2209 break;
2210 case ISDN_STAT_BCONN:
2211#ifdef ISDN_TTY_STAT_DEBUG
2212 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2213#endif
2214 /* Wake up any processes waiting
2215 * for incoming call of this device when
2216 * DCD follow the state of incoming carrier
2217 */
2218 if (info->blocked_open &&
2219 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2220 wake_up_interruptible(&info->open_wait);
2221 }
2222
2223 /* Schedule CONNECT-Message to any tty
2224 * waiting for it and
2225 * set DCD-bit of its modem-status.
2226 */
2227 if (TTY_IS_ACTIVE(info) ||
2228 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2229 info->msr |= UART_MSR_DCD;
2230 info->emu.charge = 0;
2231 if (info->dialing & 0xf)
2232 info->last_dir = 1;
2233 else
2234 info->last_dir = 0;
2235 info->dialing = 0;
2236 info->rcvsched = 1;
2237 if (USG_MODEM(dev->usage[i])) {
2238 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2239 strcpy(info->emu.connmsg, c->parm.num);
2240 isdn_tty_modem_result(RESULT_CONNECT, info);
2241 } else
2242 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2243 }
2244 if (USG_VOICE(dev->usage[i]))
2245 isdn_tty_modem_result(RESULT_VCON, info);
2246 return 1;
2247 }
2248 break;
2249 case ISDN_STAT_BHUP:
2250#ifdef ISDN_TTY_STAT_DEBUG
2251 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2252#endif
2253 if (TTY_IS_ACTIVE(info)) {
2254#ifdef ISDN_DEBUG_MODEM_HUP
2255 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2256#endif
2257 isdn_tty_modem_hup(info, 0);
2258 return 1;
2259 }
2260 break;
2261 case ISDN_STAT_NODCH:
2262#ifdef ISDN_TTY_STAT_DEBUG
2263 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2264#endif
2265 if (TTY_IS_ACTIVE(info)) {
2266 if (info->dialing) {
2267 info->dialing = 0;
2268 info->last_l2 = -1;
2269 info->last_si = 0;
2270 sprintf(info->last_cause, "0000");
2271 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2272 }
2273 isdn_tty_modem_hup(info, 0);
2274 return 1;
2275 }
2276 break;
2277 case ISDN_STAT_UNLOAD:
2278#ifdef ISDN_TTY_STAT_DEBUG
2279 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2280#endif
2281 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2282 info = &dev->mdm.info[i];
2283 if (info->isdn_driver == c->driver) {
2284 if (info->online)
2285 isdn_tty_modem_hup(info, 1);
2286 }
2287 }
2288 return 1;
2289#ifdef CONFIG_ISDN_TTY_FAX
2290 case ISDN_STAT_FAXIND:
2291 if (TTY_IS_ACTIVE(info)) {
2292 isdn_tty_fax_command(info, c);
2293 }
2294 break;
2295#endif
2296#ifdef CONFIG_ISDN_AUDIO
2297 case ISDN_STAT_AUDIO:
2298 if (TTY_IS_ACTIVE(info)) {
2299 switch(c->parm.num[0]) {
2300 case ISDN_AUDIO_DTMF:
2301 if (info->vonline) {
2302 isdn_audio_put_dle_code(info,
2303 c->parm.num[1]);
2304 }
2305 break;
2306 }
2307 }
2308 break;
2309#endif
2310 }
2311 }
2312 return 0;
2313}
2314
2315/*********************************************************************
2316 Modem-Emulator-Routines
2317 *********************************************************************/
2318
2319#define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2320
2321/*
2322 * Put a message from the AT-emulator into receive-buffer of tty,
2323 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2324 */
2325void
2326isdn_tty_at_cout(char *msg, modem_info * info)
2327{
2328 struct tty_struct *tty;
2329 atemu *m = &info->emu;
2330 char *p;
2331 char c;
2332 u_long flags;
2333 struct sk_buff *skb = NULL;
2334 char *sp = NULL;
1f4d4a80 2335 int l;
1da177e4
LT		 2336
2337 if (!msg) {
2338 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2339 return;
2340 }
1f4d4a80
AB		 2341
2342 l = strlen(msg);
2343
1da177e4
LT		 2344 spin_lock_irqsave(&info->readlock, flags);
2345 tty = info->tty;
2346 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2347 spin_unlock_irqrestore(&info->readlock, flags);
2348 return;
2349 }
2350
33f0f88f
AC		 2351 /* use queue instead of direct, if online and */
2352 /* data is in queue or buffer is full */
61b9a26a
KK		 2353 if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2354 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
33f0f88f 2355 skb = alloc_skb(l, GFP_ATOMIC);
1da177e4
LT		 2356 if (!skb) {
2357 spin_unlock_irqrestore(&info->readlock, flags);
2358 return;
2359 }
33f0f88f 2360 sp = skb_put(skb, l);
1da177e4
LT		 2361#ifdef CONFIG_ISDN_AUDIO
2362 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2363 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2364#endif
2365 }
2366
2367 for (p = msg; *p; p++) {
2368 switch (*p) {
2369 case '\r':
2370 c = m->mdmreg[REG_CR];
2371 break;
2372 case '\n':
2373 c = m->mdmreg[REG_LF];
2374 break;
2375 case '\b':
2376 c = m->mdmreg[REG_BS];
2377 break;
2378 default:
2379 c = *p;
2380 }
2381 if (skb) {
2382 *sp++ = c;
2383 } else {
33f0f88f 2384 if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
1da177e4 2385 break;
1da177e4
LT		 2386 }
2387 }
2388 if (skb) {
2389 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2390 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2391 spin_unlock_irqrestore(&info->readlock, flags);
2392 /* Schedule dequeuing */
33f0f88f 2393 if (dev->modempoll && info->rcvsched)
1da177e4
LT		 2394 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2395
2396 } else {
2397 spin_unlock_irqrestore(&info->readlock, flags);
33f0f88f 2398 tty_flip_buffer_push(tty);
1da177e4
LT		 2399 }
2400}
2401
2402/*
2403 * Perform ATH Hangup
2404 */
2405static void
2406isdn_tty_on_hook(modem_info * info)
2407{
2408 if (info->isdn_channel >= 0) {
2409#ifdef ISDN_DEBUG_MODEM_HUP
2410 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2411#endif
2412 isdn_tty_modem_hup(info, 1);
2413 }
2414}
2415
2416static void
2417isdn_tty_off_hook(void)
2418{
2419 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2420}
2421
2422#define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
2423#define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
2424
2425/*
2426 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2427 * isdn_tty_modem_escape() if sequence found.
2428 *
2429 * Parameters:
2430 * p pointer to databuffer
2431 * plus escape-character
2432 * count length of buffer
2433 * pluscount count of valid escape-characters so far
2434 * lastplus timestamp of last character
2435 */
2436static void
2437isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2438 u_long *lastplus)
2439{
2440 if (plus > 127)
2441 return;
2442 if (count > 3) {
2443 p += count - 3;
2444 count = 3;
2445 *pluscount = 0;
2446 }
2447 while (count > 0) {
2448 if (*(p++) == plus) {
2449 if ((*pluscount)++) {
2450 /* Time since last '+' > 0.5 sec. ? */
2451 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2452 *pluscount = 1;
2453 } else {
2454 /* Time since last non-'+' < 1.5 sec. ? */
2455 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2456 *pluscount = 0;
2457 }
2458 if ((*pluscount == 3) && (count == 1))
2459 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2460 if (*pluscount > 3)
2461 *pluscount = 1;
2462 } else
2463 *pluscount = 0;
2464 *lastplus = jiffies;
2465 count--;
2466 }
2467}
2468
2469/*
2470 * Return result of AT-emulator to tty-receive-buffer, depending on
2471 * modem-register 12, bit 0 and 1.
2472 * For CONNECT-messages also switch to online-mode.
2473 * For RING-message handle auto-ATA if register 0 != 0
2474 */
2475
2476static void
2477isdn_tty_modem_result(int code, modem_info * info)
2478{
2479 atemu *m = &info->emu;
2480 static char *msg[] =
2481 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2482 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2483 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2484 char s[ISDN_MSNLEN+10];
2485
2486 switch (code) {
2487 case RESULT_RING:
2488 m->mdmreg[REG_RINGCNT]++;
2489 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2490 /* Automatically accept incoming call */
2491 isdn_tty_cmd_ATA(info);
2492 break;
2493 case RESULT_NO_CARRIER:
2494#ifdef ISDN_DEBUG_MODEM_HUP
2495 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2496 (info->flags & ISDN_ASYNC_CLOSING),
2497 (!info->tty));
2498#endif
2499 m->mdmreg[REG_RINGCNT] = 0;
2500 del_timer(&info->nc_timer);
2501 info->ncarrier = 0;
2502 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2503 return;
2504 }
2505#ifdef CONFIG_ISDN_AUDIO
2506 if (info->vonline & 1) {
2507#ifdef ISDN_DEBUG_MODEM_VOICE
2508 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2509 info->line);
2510#endif
2511 /* voice-recording, add DLE-ETX */
2512 isdn_tty_at_cout("\020\003", info);
2513 }
2514 if (info->vonline & 2) {
2515#ifdef ISDN_DEBUG_MODEM_VOICE
2516 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2517 info->line);
2518#endif
2519 /* voice-playing, add DLE-DC4 */
2520 isdn_tty_at_cout("\020\024", info);
2521 }
2522#endif
2523 break;
2524 case RESULT_CONNECT:
2525 case RESULT_CONNECT64000:
2526 sprintf(info->last_cause, "0000");
2527 if (!info->online)
2528 info->online = 2;
2529 break;
2530 case RESULT_VCON:
2531#ifdef ISDN_DEBUG_MODEM_VOICE
2532 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2533 info->line);
2534#endif
2535 sprintf(info->last_cause, "0000");
2536 if (!info->online)
2537 info->online = 1;
2538 break;
2539 } /* switch(code) */
2540
2541 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2542 /* Show results */
2543 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2544 /* Show numeric results only */
2545 sprintf(s, "\r\n%d\r\n", code);
2546 isdn_tty_at_cout(s, info);
2547 } else {
2548 if (code == RESULT_RING) {
2549 /* return if "show RUNG" and ringcounter>1 */
2550 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2551 (m->mdmreg[REG_RINGCNT] > 1))
2552 return;
2553 /* print CID, _before_ _every_ ring */
2554 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2555 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2556 isdn_tty_at_cout(dev->num[info->drv_index], info);
2557 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2558 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2559 isdn_tty_at_cout(info->emu.cpn, info);
2560 }
2561 }
2562 }
2563 isdn_tty_at_cout("\r\n", info);
2564 isdn_tty_at_cout(msg[code], info);
2565 switch (code) {
2566 case RESULT_CONNECT:
2567 switch (m->mdmreg[REG_L2PROT]) {
2568 case ISDN_PROTO_L2_MODEM:
2569 isdn_tty_at_cout(" ", info);
2570 isdn_tty_at_cout(m->connmsg, info);
2571 break;
2572 }
2573 break;
2574 case RESULT_RING:
2575 /* Append CPN, if enabled */
2576 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2577 sprintf(s, "/%s", m->cpn);
2578 isdn_tty_at_cout(s, info);
2579 }
2580 /* Print CID only once, _after_ 1st RING */
2581 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2582 (m->mdmreg[REG_RINGCNT] == 1)) {
2583 isdn_tty_at_cout("\r\n", info);
2584 isdn_tty_at_cout("CALLER NUMBER: ", info);
2585 isdn_tty_at_cout(dev->num[info->drv_index], info);
2586 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2587 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2588 isdn_tty_at_cout(info->emu.cpn, info);
2589 }
2590 }
2591 break;
2592 case RESULT_NO_CARRIER:
2593 case RESULT_NO_DIALTONE:
2594 case RESULT_BUSY:
2595 case RESULT_NO_ANSWER:
2596 m->mdmreg[REG_RINGCNT] = 0;
2597 /* Append Cause-Message if enabled */
2598 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2599 sprintf(s, "/%s", info->last_cause);
2600 isdn_tty_at_cout(s, info);
2601 }
2602 break;
2603 case RESULT_CONNECT64000:
2604 /* Append Protocol to CONNECT message */
2605 switch (m->mdmreg[REG_L2PROT]) {
2606 case ISDN_PROTO_L2_X75I:
2607 case ISDN_PROTO_L2_X75UI:
2608 case ISDN_PROTO_L2_X75BUI:
2609 isdn_tty_at_cout("/X.75", info);
2610 break;
2611 case ISDN_PROTO_L2_HDLC:
2612 isdn_tty_at_cout("/HDLC", info);
2613 break;
2614 case ISDN_PROTO_L2_V11096:
2615 isdn_tty_at_cout("/V110/9600", info);
2616 break;
2617 case ISDN_PROTO_L2_V11019:
2618 isdn_tty_at_cout("/V110/19200", info);
2619 break;
2620 case ISDN_PROTO_L2_V11038:
2621 isdn_tty_at_cout("/V110/38400", info);
2622 break;
2623 }
2624 if (m->mdmreg[REG_T70] & BIT_T70) {
2625 isdn_tty_at_cout("/T.70", info);
2626 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2627 isdn_tty_at_cout("+", info);
2628 }
2629 break;
2630 }
2631 isdn_tty_at_cout("\r\n", info);
2632 }
2633 }
2634 if (code == RESULT_NO_CARRIER) {
2635 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2636 return;
2637 }
00409bb0
MG		 2638#ifdef CONFIG_ISDN_AUDIO
2639 if ( !info->vonline )
2640 tty_ldisc_flush(info->tty);
2641#else
1da177e4 2642 tty_ldisc_flush(info->tty);
00409bb0 2643#endif
1da177e4
LT		 2644 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2645 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2646 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2647 tty_hangup(info->tty);
2648 }
2649 }
2650}
2651
2652
2653/*
2654 * Display a modem-register-value.
2655 */
2656static void
2657isdn_tty_show_profile(int ridx, modem_info * info)
2658{
2659 char v[6];
2660
2661 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2662 isdn_tty_at_cout(v, info);
2663}
2664
2665/*
2666 * Get MSN-string from char-pointer, set pointer to end of number
2667 */
2668static void
2669isdn_tty_get_msnstr(char *n, char **p)
2670{
2671 int limit = ISDN_MSNLEN - 1;
2672
2673 while (((*p[0] >= '0' && *p[0] <= '9') ||
2674 /* Why a comma ??? */
2675 (*p[0] == ',') || (*p[0] == ':')) &&
2676 (limit--))
2677 *n++ = *p[0]++;
2678 *n = '\0';
2679}
2680
2681/*
2682 * Get phone-number from modem-commandbuffer
2683 */
2684static void
2685isdn_tty_getdial(char *p, char *q,int cnt)
2686{
2687 int first = 1;
2688 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2689 buffer overflow */
2690
924ad158 2691 while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) {
1da177e4 2692 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
924ad158 2693 ((*p == 'R') && first) ||
1da177e4
LT		 2694 (*p == '*') || (*p == '#')) {
2695 *q++ = *p;
2696 limit--;
2697 }
2698 if(!limit)
2699 break;
2700 p++;
2701 first = 0;
2702 }
2703 *q = 0;
2704}
2705
2706#define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2707#define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2708
2709static void
2710isdn_tty_report(modem_info * info)
2711{
2712 atemu *m = &info->emu;
2713 char s[80];
2714
2715 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2716 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2717 isdn_tty_at_cout(s, info);
2718 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2719 isdn_tty_at_cout(s, info);
2720 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2721 switch (info->last_l2) {
2722 case ISDN_PROTO_L2_X75I:
2723 isdn_tty_at_cout("X.75i", info);
2724 break;
2725 case ISDN_PROTO_L2_X75UI:
2726 isdn_tty_at_cout("X.75ui", info);
2727 break;
2728 case ISDN_PROTO_L2_X75BUI:
2729 isdn_tty_at_cout("X.75bui", info);
2730 break;
2731 case ISDN_PROTO_L2_HDLC:
2732 isdn_tty_at_cout("HDLC", info);
2733 break;
2734 case ISDN_PROTO_L2_V11096:
2735 isdn_tty_at_cout("V.110 9600 Baud", info);
2736 break;
2737 case ISDN_PROTO_L2_V11019:
2738 isdn_tty_at_cout("V.110 19200 Baud", info);
2739 break;
2740 case ISDN_PROTO_L2_V11038:
2741 isdn_tty_at_cout("V.110 38400 Baud", info);
2742 break;
2743 case ISDN_PROTO_L2_TRANS:
2744 isdn_tty_at_cout("transparent", info);
2745 break;
2746 case ISDN_PROTO_L2_MODEM:
2747 isdn_tty_at_cout("modem", info);
2748 break;
2749 case ISDN_PROTO_L2_FAX:
2750 isdn_tty_at_cout("fax", info);
2751 break;
2752 default:
2753 isdn_tty_at_cout("unknown", info);
2754 break;
2755 }
2756 if (m->mdmreg[REG_T70] & BIT_T70) {
2757 isdn_tty_at_cout("/T.70", info);
2758 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2759 isdn_tty_at_cout("+", info);
2760 }
2761 isdn_tty_at_cout("\r\n", info);
2762 isdn_tty_at_cout(" Service: ", info);
2763 switch (info->last_si) {
2764 case 1:
2765 isdn_tty_at_cout("audio\r\n", info);
2766 break;
2767 case 5:
2768 isdn_tty_at_cout("btx\r\n", info);
2769 break;
2770 case 7:
2771 isdn_tty_at_cout("data\r\n", info);
2772 break;
2773 default:
2774 sprintf(s, "%d\r\n", info->last_si);
2775 isdn_tty_at_cout(s, info);
2776 break;
2777 }
2778 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2779 isdn_tty_at_cout(s, info);
2780 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2781 isdn_tty_at_cout(s, info);
2782}
2783
2784/*
2785 * Parse AT&.. commands.
2786 */
2787static int
2788isdn_tty_cmd_ATand(char **p, modem_info * info)
2789{
2790 atemu *m = &info->emu;
2791 int i;
2792 char rb[100];
2793
2794#define MAXRB (sizeof(rb) - 1)
2795
2796 switch (*p[0]) {
2797 case 'B':
2798 /* &B - Set Buffersize */
2799 p[0]++;
2800 i = isdn_getnum(p);
2801 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2802 PARSE_ERROR1;
2803#ifdef CONFIG_ISDN_AUDIO
2804 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2805 PARSE_ERROR1;
2806#endif
2807 m->mdmreg[REG_PSIZE] = i / 16;
2808 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2809 switch (m->mdmreg[REG_L2PROT]) {
2810 case ISDN_PROTO_L2_V11096:
2811 case ISDN_PROTO_L2_V11019:
2812 case ISDN_PROTO_L2_V11038:
2813 info->xmit_size /= 10;
2814 }
2815 break;
2816 case 'C':
2817 /* &C - DCD Status */
2818 p[0]++;
2819 switch (isdn_getnum(p)) {
2820 case 0:
2821 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2822 break;
2823 case 1:
2824 m->mdmreg[REG_DCD] |= BIT_DCD;
2825 break;
2826 default:
2827 PARSE_ERROR1
2828 }
2829 break;
2830 case 'D':
2831 /* &D - Set DTR-Low-behavior */
2832 p[0]++;
2833 switch (isdn_getnum(p)) {
2834 case 0:
2835 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2836 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2837 break;
2838 case 2:
2839 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2840 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2841 break;
2842 case 3:
2843 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2844 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2845 break;
2846 default:
2847 PARSE_ERROR1
2848 }
2849 break;
2850 case 'E':
2851 /* &E -Set EAZ/MSN */
2852 p[0]++;
2853 isdn_tty_get_msnstr(m->msn, p);
2854 break;
2855 case 'F':
2856 /* &F -Set Factory-Defaults */
2857 p[0]++;
2858 if (info->msr & UART_MSR_DCD)
2859 PARSE_ERROR1;
2860 isdn_tty_reset_profile(m);
2861 isdn_tty_modem_reset_regs(info, 1);
2862 break;
2863#ifdef DUMMY_HAYES_AT
2864 case 'K':
2865 /* only for be compilant with common scripts */
2866 /* &K Flowcontrol - no function */
2867 p[0]++;
2868 isdn_getnum(p);
2869 break;
2870#endif
2871 case 'L':
2872 /* &L -Set Numbers to listen on */
2873 p[0]++;
2874 i = 0;
2875 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
a6a61c54 2876 (i < ISDN_LMSNLEN - 1))
1da177e4
LT		 2877 m->lmsn[i++] = *p[0]++;
2878 m->lmsn[i] = '\0';
2879 break;
2880 case 'R':
2881 /* &R - Set V.110 bitrate adaption */
2882 p[0]++;
2883 i = isdn_getnum(p);
2884 switch (i) {
2885 case 0:
2886 /* Switch off V.110, back to X.75 */
2887 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2888 m->mdmreg[REG_SI2] = 0;
2889 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2890 break;
2891 case 9600:
2892 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2893 m->mdmreg[REG_SI2] = 197;
2894 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2895 break;
2896 case 19200:
2897 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2898 m->mdmreg[REG_SI2] = 199;
2899 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2900 break;
2901 case 38400:
2902 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2903 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2904 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2905 break;
2906 default:
2907 PARSE_ERROR1;
2908 }
2909 /* Switch off T.70 */
2910 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2911 /* Set Service 7 */
2912 m->mdmreg[REG_SI1] |= 4;
2913 break;
2914 case 'S':
2915 /* &S - Set Windowsize */
2916 p[0]++;
2917 i = isdn_getnum(p);
2918 if ((i > 0) && (i < 9))
2919 m->mdmreg[REG_WSIZE] = i;
2920 else
2921 PARSE_ERROR1;
2922 break;
2923 case 'V':
2924 /* &V - Show registers */
2925 p[0]++;
2926 isdn_tty_at_cout("\r\n", info);
2927 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2928 sprintf(rb, "S%02d=%03d%s", i,
2929 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2930 isdn_tty_at_cout(rb, info);
2931 }
2932 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2933 strlen(m->msn) ? m->msn : "None");
2934 isdn_tty_at_cout(rb, info);
2935 if (strlen(m->lmsn)) {
2936 isdn_tty_at_cout("\r\nListen: ", info);
2937 isdn_tty_at_cout(m->lmsn, info);
2938 isdn_tty_at_cout("\r\n", info);
2939 }
2940 break;
2941 case 'W':
2942 /* &W - Write Profile */
2943 p[0]++;
2944 switch (*p[0]) {
2945 case '0':
2946 p[0]++;
2947 modem_write_profile(m);
2948 break;
2949 default:
2950 PARSE_ERROR1;
2951 }
2952 break;
2953 case 'X':
2954 /* &X - Switch to BTX-Mode and T.70 */
2955 p[0]++;
2956 switch (isdn_getnum(p)) {
2957 case 0:
2958 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2959 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2960 break;
2961 case 1:
2962 m->mdmreg[REG_T70] |= BIT_T70;
2963 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2964 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2965 info->xmit_size = 112;
2966 m->mdmreg[REG_SI1] = 4;
2967 m->mdmreg[REG_SI2] = 0;
2968 break;
2969 case 2:
2970 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2971 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2972 info->xmit_size = 112;
2973 m->mdmreg[REG_SI1] = 4;
2974 m->mdmreg[REG_SI2] = 0;
2975 break;
2976 default:
2977 PARSE_ERROR1;
2978 }
2979 break;
2980 default:
2981 PARSE_ERROR1;
2982 }
2983 return 0;
2984}
2985
2986static int
2987isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
2988{
2989 /* Some plausibility checks */
2990 switch (mreg) {
2991 case REG_L2PROT:
2992 if (mval > ISDN_PROTO_L2_MAX)
2993 return 1;
2994 break;
2995 case REG_PSIZE:
2996 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2997 return 1;
2998#ifdef CONFIG_ISDN_AUDIO
2999 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
3000 return 1;
3001#endif
3002 info->xmit_size = mval * 16;
3003 switch (m->mdmreg[REG_L2PROT]) {
3004 case ISDN_PROTO_L2_V11096:
3005 case ISDN_PROTO_L2_V11019:
3006 case ISDN_PROTO_L2_V11038:
3007 info->xmit_size /= 10;
3008 }
3009 break;
3010 case REG_SI1I:
3011 case REG_PLAN:
3012 case REG_SCREEN:
3013 /* readonly registers */
3014 return 1;
3015 }
3016 return 0;
3017}
3018
3019/*
3020 * Perform ATS command
3021 */
3022static int
3023isdn_tty_cmd_ATS(char **p, modem_info * info)
3024{
3025 atemu *m = &info->emu;
3026 int bitpos;
3027 int mreg;
3028 int mval;
3029 int bval;
3030
3031 mreg = isdn_getnum(p);
3032 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3033 PARSE_ERROR1;
3034 switch (*p[0]) {
3035 case '=':
3036 p[0]++;
3037 mval = isdn_getnum(p);
3038 if (mval < 0 || mval > 255)
3039 PARSE_ERROR1;
3040 if (isdn_tty_check_ats(mreg, mval, info, m))
3041 PARSE_ERROR1;
3042 m->mdmreg[mreg] = mval;
3043 break;
3044 case '.':
3045 /* Set/Clear a single bit */
3046 p[0]++;
3047 bitpos = isdn_getnum(p);
3048 if ((bitpos < 0) || (bitpos > 7))
3049 PARSE_ERROR1;
3050 switch (*p[0]) {
3051 case '=':
3052 p[0]++;
3053 bval = isdn_getnum(p);
3054 if (bval < 0 || bval > 1)
3055 PARSE_ERROR1;
3056 if (bval)
3057 mval = m->mdmreg[mreg] | (1 << bitpos);
3058 else
3059 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3060 if (isdn_tty_check_ats(mreg, mval, info, m))
3061 PARSE_ERROR1;
3062 m->mdmreg[mreg] = mval;
3063 break;
3064 case '?':
3065 p[0]++;
3066 isdn_tty_at_cout("\r\n", info);
3067 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3068 info);
3069 break;
3070 default:
3071 PARSE_ERROR1;
3072 }
3073 break;
3074 case '?':
3075 p[0]++;
3076 isdn_tty_show_profile(mreg, info);
3077 break;
3078 default:
3079 PARSE_ERROR1;
3080 break;
3081 }
3082 return 0;
3083}
3084
3085/*
3086 * Perform ATA command
3087 */
3088static void
3089isdn_tty_cmd_ATA(modem_info * info)
3090{
3091 atemu *m = &info->emu;
3092 isdn_ctrl cmd;
3093 int l2;
3094
3095 if (info->msr & UART_MSR_RI) {
3096 /* Accept incoming call */
3097 info->last_dir = 0;
3098 strcpy(info->last_num, dev->num[info->drv_index]);
3099 m->mdmreg[REG_RINGCNT] = 0;
3100 info->msr &= ~UART_MSR_RI;
3101 l2 = m->mdmreg[REG_L2PROT];
3102#ifdef CONFIG_ISDN_AUDIO
3103 /* If more than one bit set in reg18, autoselect Layer2 */
3104 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3105 if (m->mdmreg[REG_SI1I] == 1) {
3106 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3107 l2 = ISDN_PROTO_L2_TRANS;
3108 } else
3109 l2 = ISDN_PROTO_L2_X75I;
3110 }
3111#endif
3112 cmd.driver = info->isdn_driver;
3113 cmd.command = ISDN_CMD_SETL2;
3114 cmd.arg = info->isdn_channel + (l2 << 8);
3115 info->last_l2 = l2;
3116 isdn_command(&cmd);
3117 cmd.driver = info->isdn_driver;
3118 cmd.command = ISDN_CMD_SETL3;
3119 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3120#ifdef CONFIG_ISDN_TTY_FAX
3121 if (l2 == ISDN_PROTO_L2_FAX) {
3122 cmd.parm.fax = info->fax;
3123 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3124 }
3125#endif
3126 isdn_command(&cmd);
3127 cmd.driver = info->isdn_driver;
3128 cmd.arg = info->isdn_channel;
3129 cmd.command = ISDN_CMD_ACCEPTD;
3130 info->dialing = 16;
3131 info->emu.carrierwait = 0;
3132 isdn_command(&cmd);
3133 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3134 } else
3135 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3136}
3137
3138#ifdef CONFIG_ISDN_AUDIO
3139/*
3140 * Parse AT+F.. commands
3141 */
3142static int
3143isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3144{
3145 atemu *m = &info->emu;
3146 char rs[20];
3147
3148 if (!strncmp(p[0], "CLASS", 5)) {
3149 p[0] += 5;
3150 switch (*p[0]) {
3151 case '?':
3152 p[0]++;
3153 sprintf(rs, "\r\n%d",
3154 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3155#ifdef CONFIG_ISDN_TTY_FAX
3156 if (TTY_IS_FCLASS2(info))
3157 sprintf(rs, "\r\n2");
3158 else if (TTY_IS_FCLASS1(info))
3159 sprintf(rs, "\r\n1");
3160#endif
3161 isdn_tty_at_cout(rs, info);
3162 break;
3163 case '=':
3164 p[0]++;
3165 switch (*p[0]) {
3166 case '0':
3167 p[0]++;
3168 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3169 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3170 m->mdmreg[REG_SI1] = 4;
3171 info->xmit_size =
3172 m->mdmreg[REG_PSIZE] * 16;
3173 break;
3174#ifdef CONFIG_ISDN_TTY_FAX
3175 case '1':
3176 p[0]++;
3177 if (!(dev->global_features &
3178 ISDN_FEATURE_L3_FCLASS1))
3179 PARSE_ERROR1;
3180 m->mdmreg[REG_SI1] = 1;
3181 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3182 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3183 info->xmit_size =
3184 m->mdmreg[REG_PSIZE] * 16;
3185 break;
3186 case '2':
3187 p[0]++;
3188 if (!(dev->global_features &
3189 ISDN_FEATURE_L3_FCLASS2))
3190 PARSE_ERROR1;
3191 m->mdmreg[REG_SI1] = 1;
3192 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3193 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3194 info->xmit_size =
3195 m->mdmreg[REG_PSIZE] * 16;
3196 break;
3197#endif
3198 case '8':
3199 p[0]++;
3200 /* L2 will change on dialout with si=1 */
3201 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3202 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3203 m->mdmreg[REG_SI1] = 5;
3204 info->xmit_size = VBUF;
3205 break;
3206 case '?':
3207 p[0]++;
3208 strcpy(rs, "\r\n0,");
3209#ifdef CONFIG_ISDN_TTY_FAX
3210 if (dev->global_features &
3211 ISDN_FEATURE_L3_FCLASS1)
3212 strcat(rs, "1,");
3213 if (dev->global_features &
3214 ISDN_FEATURE_L3_FCLASS2)
3215 strcat(rs, "2,");
3216#endif
3217 strcat(rs, "8");
3218 isdn_tty_at_cout(rs, info);
3219 break;
3220 default:
3221 PARSE_ERROR1;
3222 }
3223 break;
3224 default:
3225 PARSE_ERROR1;
3226 }
3227 return 0;
3228 }
3229#ifdef CONFIG_ISDN_TTY_FAX
3230 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3231#else
3232 PARSE_ERROR1;
3233#endif
3234}
3235
3236/*
3237 * Parse AT+V.. commands
3238 */
3239static int
3240isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3241{
3242 atemu *m = &info->emu;
3243 isdn_ctrl cmd;
3244 static char *vcmd[] =
3245 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3246 int i;
3247 int par1;
3248 int par2;
3249 char rs[20];
3250
3251 i = 0;
3252 while (vcmd[i]) {
3253 if (!strncmp(vcmd[i], p[0], 2)) {
3254 p[0] += 2;
3255 break;
3256 }
3257 i++;
3258 }
3259 switch (i) {
3260 case 0:
3261 /* AT+VNH - Auto hangup feature */
3262 switch (*p[0]) {
3263 case '?':
3264 p[0]++;
3265 isdn_tty_at_cout("\r\n1", info);
3266 break;
3267 case '=':
3268 p[0]++;
3269 switch (*p[0]) {
3270 case '1':
3271 p[0]++;
3272 break;
3273 case '?':
3274 p[0]++;
3275 isdn_tty_at_cout("\r\n1", info);
3276 break;
3277 default:
3278 PARSE_ERROR1;
3279 }
3280 break;
3281 default:
3282 PARSE_ERROR1;
3283 }
3284 break;
3285 case 1:
3286 /* AT+VIP - Reset all voice parameters */
3287 isdn_tty_modem_reset_vpar(m);
3288 break;
3289 case 2:
3290 /* AT+VLS - Select device, accept incoming call */
3291 switch (*p[0]) {
3292 case '?':
3293 p[0]++;
3294 sprintf(rs, "\r\n%d", m->vpar[0]);
3295 isdn_tty_at_cout(rs, info);
3296 break;
3297 case '=':
3298 p[0]++;
3299 switch (*p[0]) {
3300 case '0':
3301 p[0]++;
3302 m->vpar[0] = 0;
3303 break;
3304 case '2':
3305 p[0]++;
3306 m->vpar[0] = 2;
3307 break;
3308 case '?':
3309 p[0]++;
3310 isdn_tty_at_cout("\r\n0,2", info);
3311 break;
3312 default:
3313 PARSE_ERROR1;
3314 }
3315 break;
3316 default:
3317 PARSE_ERROR1;
3318 }
3319 break;
3320 case 3:
3321 /* AT+VRX - Start recording */
3322 if (!m->vpar[0])
3323 PARSE_ERROR1;
3324 if (info->online != 1) {
3325 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3326 return 1;
3327 }
3328 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3329 if (!info->dtmf_state) {
3330 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3331 PARSE_ERROR1;
3332 }
3333 info->silence_state = isdn_audio_silence_init(info->silence_state);
3334 if (!info->silence_state) {
3335 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3336 PARSE_ERROR1;
3337 }
3338 if (m->vpar[3] < 5) {
3339 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3340 if (!info->adpcmr) {
3341 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3342 PARSE_ERROR1;
3343 }
3344 }
3345#ifdef ISDN_DEBUG_AT
3346 printk(KERN_DEBUG "AT: +VRX\n");
3347#endif
3348 info->vonline |= 1;
3349 isdn_tty_modem_result(RESULT_CONNECT, info);
3350 return 0;
3351 break;
3352 case 4:
3353 /* AT+VSD - Silence detection */
3354 switch (*p[0]) {
3355 case '?':
3356 p[0]++;
3357 sprintf(rs, "\r\n<%d>,<%d>",
3358 m->vpar[1],
3359 m->vpar[2]);
3360 isdn_tty_at_cout(rs, info);
3361 break;
3362 case '=':
3363 p[0]++;
3364 if ((*p[0]>='0') && (*p[0]<='9')) {
3365 par1 = isdn_getnum(p);
3366 if ((par1 < 0) || (par1 > 31))
3367 PARSE_ERROR1;
3368 if (*p[0] != ',')
3369 PARSE_ERROR1;
3370 p[0]++;
3371 par2 = isdn_getnum(p);
3372 if ((par2 < 0) || (par2 > 255))
3373 PARSE_ERROR1;
3374 m->vpar[1] = par1;
3375 m->vpar[2] = par2;
3376 break;
3377 } else
3378 if (*p[0] == '?') {
3379 p[0]++;
3380 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3381 info);
3382 break;
3383 } else
3384 PARSE_ERROR1;
3385 break;
3386 default:
3387 PARSE_ERROR1;
3388 }
3389 break;
3390 case 5:
3391 /* AT+VSM - Select compression */
3392 switch (*p[0]) {
3393 case '?':
3394 p[0]++;
3395 sprintf(rs, "\r\n<%d>,<%d><8000>",
3396 m->vpar[3],
3397 m->vpar[1]);
3398 isdn_tty_at_cout(rs, info);
3399 break;
3400 case '=':
3401 p[0]++;
3402 switch (*p[0]) {
3403 case '2':
3404 case '3':
3405 case '4':
3406 case '5':
3407 case '6':
3408 par1 = isdn_getnum(p);
3409 if ((par1 < 2) || (par1 > 6))
3410 PARSE_ERROR1;
3411 m->vpar[3] = par1;
3412 break;
3413 case '?':
3414 p[0]++;
3415 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3416 info);
3417 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3418 info);
3419 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3420 info);
3421 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3422 info);
3423 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3424 info);
3425 break;
3426 default:
3427 PARSE_ERROR1;
3428 }
3429 break;
3430 default:
3431 PARSE_ERROR1;
3432 }
3433 break;
3434 case 6:
3435 /* AT+VTX - Start sending */
3436 if (!m->vpar[0])
3437 PARSE_ERROR1;
3438 if (info->online != 1) {
3439 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3440 return 1;
3441 }
3442 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3443 if (!info->dtmf_state) {
3444 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3445 PARSE_ERROR1;
3446 }
3447 if (m->vpar[3] < 5) {
3448 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3449 if (!info->adpcms) {
3450 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3451 PARSE_ERROR1;
3452 }
3453 }
3454#ifdef ISDN_DEBUG_AT
3455 printk(KERN_DEBUG "AT: +VTX\n");
3456#endif
3457 m->lastDLE = 0;
3458 info->vonline |= 2;
3459 isdn_tty_modem_result(RESULT_CONNECT, info);
3460 return 0;
3461 break;
3462 case 7:
3463 /* AT+VDD - DTMF detection */
3464 switch (*p[0]) {
3465 case '?':
3466 p[0]++;
3467 sprintf(rs, "\r\n<%d>,<%d>",
3468 m->vpar[4],
3469 m->vpar[5]);
3470 isdn_tty_at_cout(rs, info);
3471 break;
3472 case '=':
3473 p[0]++;
3474 if ((*p[0]>='0') && (*p[0]<='9')) {
3475 if (info->online != 1)
3476 PARSE_ERROR1;
3477 par1 = isdn_getnum(p);
3478 if ((par1 < 0) || (par1 > 15))
3479 PARSE_ERROR1;
3480 if (*p[0] != ',')
3481 PARSE_ERROR1;
3482 p[0]++;
3483 par2 = isdn_getnum(p);
3484 if ((par2 < 0) || (par2 > 255))
3485 PARSE_ERROR1;
3486 m->vpar[4] = par1;
3487 m->vpar[5] = par2;
3488 cmd.driver = info->isdn_driver;
3489 cmd.command = ISDN_CMD_AUDIO;
3490 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3491 cmd.parm.num[0] = par1;
3492 cmd.parm.num[1] = par2;
3493 isdn_command(&cmd);
3494 break;
3495 } else
3496 if (*p[0] == '?') {
3497 p[0]++;
3498 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3499 info);
3500 break;
3501 } else
3502 PARSE_ERROR1;
3503 break;
3504 default:
3505 PARSE_ERROR1;
3506 }
3507 break;
3508 default:
3509 PARSE_ERROR1;
3510 }
3511 return 0;
3512}
3513#endif /* CONFIG_ISDN_AUDIO */
3514
3515/*
3516 * Parse and perform an AT-command-line.
3517 */
3518static void
3519isdn_tty_parse_at(modem_info * info)
3520{
3521 atemu *m = &info->emu;
3522 char *p;
3523 char ds[40];
3524
3525#ifdef ISDN_DEBUG_AT
3526 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3527#endif
3528 for (p = &m->mdmcmd[2]; *p;) {
3529 switch (*p) {
3530 case ' ':
3531 p++;
3532 break;
3533 case 'A':
3534 /* A - Accept incoming call */
3535 p++;
3536 isdn_tty_cmd_ATA(info);
3537 return;
3538 break;
3539 case 'D':
3540 /* D - Dial */
3541 if (info->msr & UART_MSR_DCD)
3542 PARSE_ERROR;
3543 if (info->msr & UART_MSR_RI) {
3544 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3545 return;
3546 }
3547 isdn_tty_getdial(++p, ds, sizeof ds);
3548 p += strlen(p);
3549 if (!strlen(m->msn))
3550 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3551 else if (strlen(ds))
3552 isdn_tty_dial(ds, info, m);
3553 else
3554 PARSE_ERROR;
3555 return;
3556 case 'E':
3557 /* E - Turn Echo on/off */
3558 p++;
3559 switch (isdn_getnum(&p)) {
3560 case 0:
3561 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3562 break;
3563 case 1:
3564 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3565 break;
3566 default:
3567 PARSE_ERROR;
3568 }
3569 break;
3570 case 'H':
3571 /* H - On/Off-hook */
3572 p++;
3573 switch (*p) {
3574 case '0':
3575 p++;
3576 isdn_tty_on_hook(info);
3577 break;
3578 case '1':
3579 p++;
3580 isdn_tty_off_hook();
3581 break;
3582 default:
3583 isdn_tty_on_hook(info);
3584 break;
3585 }
3586 break;
3587 case 'I':
3588 /* I - Information */
3589 p++;
3590 isdn_tty_at_cout("\r\nLinux ISDN", info);
3591 switch (*p) {
3592 case '0':
3593 case '1':
3594 p++;
3595 break;
3596 case '2':
3597 p++;
3598 isdn_tty_report(info);
3599 break;
3600 case '3':
3601 p++;
3602 sprintf(ds, "\r\n%d", info->emu.charge);
3603 isdn_tty_at_cout(ds, info);
3604 break;
3605 default:;
3606 }
3607 break;
3608#ifdef DUMMY_HAYES_AT
3609 case 'L':
3610 case 'M':
3611 /* only for be compilant with common scripts */
3612 /* no function */
3613 p++;
3614 isdn_getnum(&p);
3615 break;
3616#endif
3617 case 'O':
3618 /* O - Go online */
3619 p++;
3620 if (info->msr & UART_MSR_DCD)
3621 /* if B-Channel is up */
3622 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3623 else
3624 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3625 return;
3626 case 'Q':
3627 /* Q - Turn Emulator messages on/off */
3628 p++;
3629 switch (isdn_getnum(&p)) {
3630 case 0:
3631 m->mdmreg[REG_RESP] |= BIT_RESP;
3632 break;
3633 case 1:
3634 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3635 break;
3636 default:
3637 PARSE_ERROR;
3638 }
3639 break;
3640 case 'S':
3641 /* S - Set/Get Register */
3642 p++;
3643 if (isdn_tty_cmd_ATS(&p, info))
3644 return;
3645 break;
3646 case 'V':
3647 /* V - Numeric or ASCII Emulator-messages */
3648 p++;
3649 switch (isdn_getnum(&p)) {
3650 case 0:
3651 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3652 break;
3653 case 1:
3654 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3655 break;
3656 default:
3657 PARSE_ERROR;
3658 }
3659 break;
3660 case 'Z':
3661 /* Z - Load Registers from Profile */
3662 p++;
3663 if (info->msr & UART_MSR_DCD) {
3664 info->online = 0;
3665 isdn_tty_on_hook(info);
3666 }
3667 isdn_tty_modem_reset_regs(info, 1);
3668 break;
3669 case '+':
3670 p++;
3671 switch (*p) {
3672#ifdef CONFIG_ISDN_AUDIO
3673 case 'F':
3674 p++;
3675 if (isdn_tty_cmd_PLUSF(&p, info))
3676 return;
3677 break;
3678 case 'V':
3679 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3680 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3681 PARSE_ERROR;
3682 p++;
3683 if (isdn_tty_cmd_PLUSV(&p, info))
3684 return;
3685 break;
3686#endif /* CONFIG_ISDN_AUDIO */
3687 case 'S': /* SUSPEND */
3688 p++;
3689 isdn_tty_get_msnstr(ds, &p);
3690 isdn_tty_suspend(ds, info, m);
3691 break;
3692 case 'R': /* RESUME */
3693 p++;
3694 isdn_tty_get_msnstr(ds, &p);
3695 isdn_tty_resume(ds, info, m);
3696 break;
3697 case 'M': /* MESSAGE */
3698 p++;
3699 isdn_tty_send_msg(info, m, p);
3700 break;
3701 default:
3702 PARSE_ERROR;
3703 }
3704 break;
3705 case '&':
3706 p++;
3707 if (isdn_tty_cmd_ATand(&p, info))
3708 return;
3709 break;
3710 default:
3711 PARSE_ERROR;
3712 }
3713 }
3714#ifdef CONFIG_ISDN_AUDIO
3715 if (!info->vonline)
3716#endif
3717 isdn_tty_modem_result(RESULT_OK, info);
3718}
3719
3720/* Need own toupper() because standard-toupper is not available
3721 * within modules.
3722 */
3723#define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3724
3725/*
3726 * Perform line-editing of AT-commands
3727 *
3728 * Parameters:
3729 * p inputbuffer
3730 * count length of buffer
3731 * channel index to line (minor-device)
3732 */
3733static int
3734isdn_tty_edit_at(const char *p, int count, modem_info * info)
3735{
3736 atemu *m = &info->emu;
3737 int total = 0;
3738 u_char c;
3739 char eb[2];
3740 int cnt;
3741
3742 for (cnt = count; cnt > 0; p++, cnt--) {
3743 c = *p;
3744 total++;
3745 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3746 /* Separator (CR or LF) */
3747 m->mdmcmd[m->mdmcmdl] = 0;
3748 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3749 eb[0] = c;
3750 eb[1] = 0;
3751 isdn_tty_at_cout(eb, info);
3752 }
3753 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3754 isdn_tty_parse_at(info);
3755 m->mdmcmdl = 0;
3756 continue;
3757 }
3758 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3759 /* Backspace-Function */
3760 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3761 if (m->mdmcmdl)
3762 m->mdmcmdl--;
3763 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3764 isdn_tty_at_cout("\b", info);
3765 }
3766 continue;
3767 }
3768 if (cmdchar(c)) {
3769 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3770 eb[0] = c;
3771 eb[1] = 0;
3772 isdn_tty_at_cout(eb, info);
3773 }
3774 if (m->mdmcmdl < 255) {
3775 c = my_toupper(c);
3776 switch (m->mdmcmdl) {
3777 case 1:
3778 if (c == 'T') {
3779 m->mdmcmd[m->mdmcmdl] = c;
3780 m->mdmcmd[++m->mdmcmdl] = 0;
3781 break;
3782 } else
3783 m->mdmcmdl = 0;
3784 /* Fall through, check for 'A' */
3785 case 0:
3786 if (c == 'A') {
3787 m->mdmcmd[m->mdmcmdl] = c;
3788 m->mdmcmd[++m->mdmcmdl] = 0;
3789 }
3790 break;
3791 default:
3792 m->mdmcmd[m->mdmcmdl] = c;
3793 m->mdmcmd[++m->mdmcmdl] = 0;
3794 }
3795 }
3796 }
3797 }
3798 return total;
3799}
3800
3801/*
3802 * Switch all modem-channels who are online and got a valid
3803 * escape-sequence 1.5 seconds ago, to command-mode.
3804 * This function is called every second via timer-interrupt from within
3805 * timer-dispatcher isdn_timer_function()
3806 */
3807void
3808isdn_tty_modem_escape(void)
3809{
3810 int ton = 0;
3811 int i;
3812 int midx;
3813
3814 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3815 if (USG_MODEM(dev->usage[i]))
3816 if ((midx = dev->m_idx[i]) >= 0) {
3817 modem_info *info = &dev->mdm.info[midx];
3818 if (info->online) {
3819 ton = 1;
3820 if ((info->emu.pluscount == 3) &&
3821 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3822 info->emu.pluscount = 0;
3823 info->online = 0;
3824 isdn_tty_modem_result(RESULT_OK, info);
3825 }
3826 }
3827 }
3828 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3829}
3830
3831/*
3832 * Put a RING-message to all modem-channels who have the RI-bit set.
3833 * This function is called every second via timer-interrupt from within
3834 * timer-dispatcher isdn_timer_function()
3835 */
3836void
3837isdn_tty_modem_ring(void)
3838{
3839 int ton = 0;
3840 int i;
3841
3842 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3843 modem_info *info = &dev->mdm.info[i];
3844 if (info->msr & UART_MSR_RI) {
3845 ton = 1;
3846 isdn_tty_modem_result(RESULT_RING, info);
3847 }
3848 }
3849 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3850}
3851
3852/*
3853 * For all online tty's, try sending data to
3854 * the lower levels.
3855 */
3856void
3857isdn_tty_modem_xmit(void)
3858{
3859 int ton = 1;
3860 int i;
3861
3862 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3863 modem_info *info = &dev->mdm.info[i];
3864 if (info->online) {
3865 ton = 1;
3866 isdn_tty_senddown(info);
3867 isdn_tty_tint(info);
3868 }
3869 }
3870 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3871}
3872
3873/*
3874 * Check all channels if we have a 'no carrier' timeout.
3875 * Timeout value is set by Register S7.
3876 */
3877void
3878isdn_tty_carrier_timeout(void)
3879{
3880 int ton = 0;
3881 int i;
3882
3883 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3884 modem_info *info = &dev->mdm.info[i];
3885 if (info->dialing) {
3886 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3887 info->dialing = 0;
3888 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3889 isdn_tty_modem_hup(info, 1);
3890 }
3891 else
3892 ton = 1;
3893 }
3894 }
3895 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3896}
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