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isdn: i4l: isdn_tty: Fix some concurrency double-free bugs
[mirror_ubuntu-bionic-kernel.git] / drivers / isdn / i4l / isdn_tty.c
CommitLineData
1ca6711e 1/*
1da177e4
LT		 2 * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
3 *
4 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
5 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
6 *
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
9 *
10 */
11#undef ISDN_TTY_STAT_DEBUG
12
1da177e4 13#include <linux/isdn.h>
6776a2f0 14#include <linux/serial.h> /* ASYNC_* flags */
5a0e3ad6 15#include <linux/slab.h>
1da177e4 16#include <linux/delay.h>
72250d44 17#include <linux/mutex.h>
3f07c014 18#include <linux/sched/signal.h>
1da177e4
LT		 19#include "isdn_common.h"
20#include "isdn_tty.h"
21#ifdef CONFIG_ISDN_AUDIO
22#include "isdn_audio.h"
23#define VBUF 0x3e0
24#define VBUFX (VBUF/16)
25#endif
26
27#define FIX_FILE_TRANSFER
28#define DUMMY_HAYES_AT
29
30/* Prototypes */
31
72250d44 32static DEFINE_MUTEX(modem_info_mutex);
1da177e4
LT		 33static int isdn_tty_edit_at(const char *, int, modem_info *);
34static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
35static void isdn_tty_modem_reset_regs(modem_info *, int);
36static void isdn_tty_cmd_ATA(modem_info *);
37static void isdn_tty_flush_buffer(struct tty_struct *);
38static void isdn_tty_modem_result(int, modem_info *);
39#ifdef CONFIG_ISDN_AUDIO
40static int isdn_tty_countDLE(unsigned char *, int);
41#endif
42
43/* Leave this unchanged unless you know what you do! */
44#define MODEM_PARANOIA_CHECK
45#define MODEM_DO_RESTART
46
47static int bit2si[8] =
48{1, 5, 7, 7, 7, 7, 7, 7};
49static int si2bit[8] =
50{4, 1, 4, 4, 4, 4, 4, 4};
51
1da177e4
LT		 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
475be4d8 62isdn_tty_try_read(modem_info *info, struct sk_buff *skb)
1da177e4 63{
227434f8 64 struct tty_port *port = &info->port;
1da177e4
LT		 65 int c;
66 int len;
33f0f88f 67 char last;
1da177e4 68
37630f40
JS		 69 if (!info->online)
70 return 0;
71
37630f40
JS		 72 if (!(info->mcr & UART_MCR_RTS))
73 return 0;
74
75 len = skb->len
1da177e4 76#ifdef CONFIG_ISDN_AUDIO
37630f40 77 + ISDN_AUDIO_SKB_DLECOUNT(skb)
1da177e4 78#endif
37630f40
JS		 79 ;
80
227434f8 81 c = tty_buffer_request_room(port, len);
37630f40
JS		 82 if (c < len)
83 return 0;
33f0f88f 84
1da177e4 85#ifdef CONFIG_ISDN_AUDIO
37630f40
JS		 86 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
87 int l = skb->len;
88 unsigned char *dp = skb->data;
89 while (--l) {
90 if (*dp == DLE)
92a19f9c
JS		 91 tty_insert_flip_char(port, DLE, 0);
92 tty_insert_flip_char(port, *dp++, 0);
37630f40
JS		 93 }
94 if (*dp == DLE)
92a19f9c 95 tty_insert_flip_char(port, DLE, 0);
37630f40
JS		 96 last = *dp;
97 } else {
1da177e4 98#endif
37630f40 99 if (len > 1)
05c7cd39 100 tty_insert_flip_string(port, skb->data, len - 1);
37630f40
JS		 101 last = skb->data[len - 1];
102#ifdef CONFIG_ISDN_AUDIO
1da177e4 103 }
37630f40
JS		 104#endif
105 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
92a19f9c 106 tty_insert_flip_char(port, last, 0xFF);
37630f40 107 else
92a19f9c 108 tty_insert_flip_char(port, last, TTY_NORMAL);
2e124b4a 109 tty_flip_buffer_push(port);
37630f40
JS		 110 kfree_skb(skb);
111
112 return 1;
1da177e4
LT		 113}
114
115/* isdn_tty_readmodem() is called periodically from within timer-interrupt.
116 * It tries getting received data from the receive queue an stuff it into
117 * the tty's flip-buffer.
118 */
119void
120isdn_tty_readmodem(void)
121{
122 int resched = 0;
123 int midx;
124 int i;
1da177e4 125 int r;
1da177e4
LT		 126 modem_info *info;
127
128 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
37630f40
JS		 129 midx = dev->m_idx[i];
130 if (midx < 0)
131 continue;
132
133 info = &dev->mdm.info[midx];
134 if (!info->online)
135 continue;
136
137 r = 0;
1da177e4 138#ifdef CONFIG_ISDN_AUDIO
37630f40
JS		 139 isdn_audio_eval_dtmf(info);
140 if ((info->vonline & 1) && (info->emu.vpar[1]))
141 isdn_audio_eval_silence(info);
142#endif
2e124b4a
JS		 143 if (info->mcr & UART_MCR_RTS) {
144 /* CISCO AsyncPPP Hack */
145 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
146 r = isdn_readbchan_tty(info->isdn_driver,
147 info->isdn_channel,
148 &info->port, 0);
149 else
150 r = isdn_readbchan_tty(info->isdn_driver,
151 info->isdn_channel,
152 &info->port, 1);
153 if (r)
154 tty_flip_buffer_push(&info->port);
37630f40
JS		 155 } else
156 r = 1;
2e124b4a 157
37630f40
JS		 158 if (r) {
159 info->rcvsched = 0;
160 resched = 1;
161 } else
162 info->rcvsched = 1;
1da177e4
LT		 163 }
164 if (!resched)
165 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
166}
167
168int
169isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
170{
171 ulong flags;
172 int midx;
173#ifdef CONFIG_ISDN_AUDIO
174 int ifmt;
175#endif
176 modem_info *info;
177
178 if ((midx = dev->m_idx[i]) < 0) {
179 /* if midx is invalid, packet is not for tty */
180 return 0;
181 }
182 info = &dev->mdm.info[midx];
183#ifdef CONFIG_ISDN_AUDIO
184 ifmt = 1;
475be4d8 185
1da177e4
LT		 186 if ((info->vonline) && (!info->emu.vpar[4]))
187 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
188 if ((info->vonline & 1) && (info->emu.vpar[1]))
189 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
190#endif
191 if ((info->online < 2)
192#ifdef CONFIG_ISDN_AUDIO
193 && (!(info->vonline & 1))
194#endif
195 ) {
196 /* If Modem not listening, drop data */
197 kfree_skb(skb);
198 return 1;
199 }
200 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
201 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
202 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
203 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
204 skb_pull(skb, 4);
205 else
206 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
207 skb_pull(skb, 2);
208 } else
209 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
210 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
211 skb_pull(skb, 4);
212 }
213#ifdef CONFIG_ISDN_AUDIO
214 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
215 ISDN_AUDIO_SKB_LOCK(skb) = 0;
216 if (info->vonline & 1) {
217 /* voice conversion/compression */
218 switch (info->emu.vpar[3]) {
475be4d8
JP		 219 case 2:
220 case 3:
221 case 4:
222 /* adpcm
223 * Since compressed data takes less
224 * space, we can overwrite the buffer.
225 */
226 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
227 ifmt,
228 skb->data,
229 skb->data,
230 skb->len));
231 break;
232 case 5:
233 /* a-law */
234 if (!ifmt)
235 isdn_audio_ulaw2alaw(skb->data, skb->len);
236 break;
237 case 6:
238 /* u-law */
239 if (ifmt)
240 isdn_audio_alaw2ulaw(skb->data, skb->len);
241 break;
1da177e4
LT		 242 }
243 ISDN_AUDIO_SKB_DLECOUNT(skb) =
244 isdn_tty_countDLE(skb->data, skb->len);
245 }
246#ifdef CONFIG_ISDN_TTY_FAX
247 else {
248 if (info->faxonline & 2) {
249 isdn_tty_fax_bitorder(info, skb);
250 ISDN_AUDIO_SKB_DLECOUNT(skb) =
251 isdn_tty_countDLE(skb->data, skb->len);
252 }
253 }
254#endif
255#endif
33f0f88f 256 /* Try to deliver directly via tty-buf if queue is empty */
1da177e4
LT		 257 spin_lock_irqsave(&info->readlock, flags);
258 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
259 if (isdn_tty_try_read(info, skb)) {
260 spin_unlock_irqrestore(&info->readlock, flags);
261 return 1;
262 }
263 /* Direct deliver failed or queue wasn't empty.
264 * Queue up for later dequeueing via timer-irq.
265 */
266 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
267 dev->drv[di]->rcvcount[channel] +=
268 (skb->len
269#ifdef CONFIG_ISDN_AUDIO
270 + ISDN_AUDIO_SKB_DLECOUNT(skb)
271#endif
272 );
273 spin_unlock_irqrestore(&info->readlock, flags);
274 /* Schedule dequeuing */
275 if ((dev->modempoll) && (info->rcvsched))
276 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
277 return 1;
278}
279
3e206b0a 280static void
475be4d8 281isdn_tty_cleanup_xmit(modem_info *info)
1da177e4
LT		 282{
283 skb_queue_purge(&info->xmit_queue);
284#ifdef CONFIG_ISDN_AUDIO
285 skb_queue_purge(&info->dtmf_queue);
286#endif
287}
288
289static void
475be4d8 290isdn_tty_tint(modem_info *info)
1da177e4
LT		 291{
292 struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
293 int len, slen;
294
295 if (!skb)
296 return;
297 len = skb->len;
298 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
299 info->isdn_channel, 1, skb)) == len) {
ba43294d 300 struct tty_struct *tty = info->port.tty;
1da177e4
LT		 301 info->send_outstanding++;
302 info->msr &= ~UART_MSR_CTS;
303 info->lsr &= ~UART_LSR_TEMT;
304 tty_wakeup(tty);
305 return;
306 }
307 if (slen < 0) {
308 /* Error: no channel, already shutdown, or wrong parameter */
309 dev_kfree_skb(skb);
310 return;
311 }
312 skb_queue_head(&info->xmit_queue, skb);
313}
314
315#ifdef CONFIG_ISDN_AUDIO
316static int
317isdn_tty_countDLE(unsigned char *buf, int len)
318{
319 int count = 0;
320
321 while (len--)
322 if (*buf++ == DLE)
323 count++;
324 return count;
325}
326
327/* This routine is called from within isdn_tty_write() to perform
328 * DLE-decoding when sending audio-data.
329 */
330static int
475be4d8 331isdn_tty_handleDLEdown(modem_info *info, atemu *m, int len)
1da177e4 332{
82e46b31 333 unsigned char *p = &info->port.xmit_buf[info->xmit_count];
1da177e4
LT		 334 int count = 0;
335
336 while (len > 0) {
337 if (m->lastDLE) {
338 m->lastDLE = 0;
339 switch (*p) {
475be4d8
JP		 340 case DLE:
341 /* Escape code */
342 if (len > 1)
343 memmove(p, p + 1, len - 1);
344 p--;
345 count++;
346 break;
347 case ETX:
348 /* End of data */
349 info->vonline |= 4;
350 return count;
351 case DC4:
352 /* Abort RX */
353 info->vonline &= ~1;
1da177e4 354#ifdef ISDN_DEBUG_MODEM_VOICE
475be4d8
JP		 355 printk(KERN_DEBUG
356 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
357 info->line);
1da177e4 358#endif
475be4d8
JP		 359 isdn_tty_at_cout("\020\003", info);
360 if (!info->vonline) {
1da177e4 361#ifdef ISDN_DEBUG_MODEM_VOICE
475be4d8
JP		 362 printk(KERN_DEBUG
363 "DLEdown: send VCON on ttyI%d\n",
364 info->line);
1da177e4 365#endif
475be4d8
JP		 366 isdn_tty_at_cout("\r\nVCON\r\n", info);
367 }
368 /* Fall through */
369 case 'q':
370 case 's':
371 /* Silence */
372 if (len > 1)
373 memmove(p, p + 1, len - 1);
374 p--;
375 break;
1da177e4
LT		 376 }
377 } else {
378 if (*p == DLE)
379 m->lastDLE = 1;
380 else
381 count++;
382 }
383 p++;
384 len--;
385 }
386 if (len < 0) {
387 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
388 return 0;
389 }
390 return count;
391}
392
393/* This routine is called from within isdn_tty_write() when receiving
394 * audio-data. It interrupts receiving, if an character other than
395 * ^S or ^Q is sent.
396 */
397static int
398isdn_tty_end_vrx(const char *buf, int c)
399{
400 char ch;
401
402 while (c--) {
403 ch = *buf;
404 if ((ch != 0x11) && (ch != 0x13))
405 return 1;
406 buf++;
407 }
408 return 0;
409}
410
411static int voice_cf[7] =
412{0, 0, 4, 3, 2, 0, 0};
413
414#endif /* CONFIG_ISDN_AUDIO */
415
416/* isdn_tty_senddown() is called either directly from within isdn_tty_write()
417 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
418 * outgoing data from the tty's xmit-buffer, handles voice-decompression or
419 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
420 */
421static void
475be4d8 422isdn_tty_senddown(modem_info *info)
1da177e4
LT		 423{
424 int buflen;
425 int skb_res;
426#ifdef CONFIG_ISDN_AUDIO
427 int audio_len;
428#endif
429 struct sk_buff *skb;
430
431#ifdef CONFIG_ISDN_AUDIO
432 if (info->vonline & 4) {
433 info->vonline &= ~6;
434 if (!info->vonline) {
435#ifdef ISDN_DEBUG_MODEM_VOICE
436 printk(KERN_DEBUG
437 "senddown: send VCON on ttyI%d\n",
438 info->line);
439#endif
440 isdn_tty_at_cout("\r\nVCON\r\n", info);
441 }
442 }
443#endif
444 if (!(buflen = info->xmit_count))
445 return;
475be4d8 446 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
1da177e4 447 info->msr &= ~UART_MSR_CTS;
475be4d8 448 info->lsr &= ~UART_LSR_TEMT;
1da177e4
LT		 449 /* info->xmit_count is modified here and in isdn_tty_write().
450 * So we return here if isdn_tty_write() is in the
451 * critical section.
452 */
453 atomic_inc(&info->xmit_lock);
454 if (!(atomic_dec_and_test(&info->xmit_lock)))
455 return;
456 if (info->isdn_driver < 0) {
457 info->xmit_count = 0;
458 return;
459 }
460 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
461#ifdef CONFIG_ISDN_AUDIO
462 if (info->vonline & 2)
463 audio_len = buflen * voice_cf[info->emu.vpar[3]];
464 else
465 audio_len = 0;
466 skb = dev_alloc_skb(skb_res + buflen + audio_len);
467#else
468 skb = dev_alloc_skb(skb_res + buflen);
469#endif
470 if (!skb) {
471 printk(KERN_WARNING
472 "isdn_tty: Out of memory in ttyI%d senddown\n",
473 info->line);
474 return;
475 }
476 skb_reserve(skb, skb_res);
59ae1d12 477 skb_put_data(skb, info->port.xmit_buf, buflen);
1da177e4
LT		 478 info->xmit_count = 0;
479#ifdef CONFIG_ISDN_AUDIO
480 if (info->vonline & 2) {
481 /* For now, ifmt is fixed to 1 (alaw), since this
482 * is used with ISDN everywhere in the world, except
483 * US, Canada and Japan.
484 * Later, when US-ISDN protocols are implemented,
485 * this setting will depend on the D-channel protocol.
486 */
487 int ifmt = 1;
488
489 /* voice conversion/decompression */
490 switch (info->emu.vpar[3]) {
475be4d8
JP		 491 case 2:
492 case 3:
493 case 4:
494 /* adpcm, compatible to ZyXel 1496 modem
495 * with ROM revision 6.01
496 */
497 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
498 ifmt,
499 skb->data,
500 skb_put(skb, audio_len),
501 buflen);
502 skb_pull(skb, buflen);
503 skb_trim(skb, audio_len);
504 break;
505 case 5:
506 /* a-law */
507 if (!ifmt)
508 isdn_audio_alaw2ulaw(skb->data,
509 buflen);
510 break;
511 case 6:
512 /* u-law */
513 if (ifmt)
514 isdn_audio_ulaw2alaw(skb->data,
515 buflen);
516 break;
1da177e4
LT		 517 }
518 }
519#endif /* CONFIG_ISDN_AUDIO */
520 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
521 /* Add T.70 simplified header */
522 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
523 memcpy(skb_push(skb, 2), "\1\0", 2);
524 else
525 memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
526 }
527 skb_queue_tail(&info->xmit_queue, skb);
528}
529
530/************************************************************
531 *
532 * Modem-functions
533 *
534 * mostly "stolen" from original Linux-serial.c and friends.
535 *
536 ************************************************************/
537
538/* The next routine is called once from within timer-interrupt
539 * triggered within isdn_tty_modem_ncarrier(). It calls
540 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
33f0f88f 541 * into the tty's buffer.
1da177e4
LT		 542 */
543static void
e99e88a9 544isdn_tty_modem_do_ncarrier(struct timer_list *t)
1da177e4 545{
e99e88a9 546 modem_info *info = from_timer(info, t, nc_timer);
1da177e4
LT		 547 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
548}
549
550/* Next routine is called, whenever the DTR-signal is raised.
551 * It checks the ncarrier-flag, and triggers the above routine
552 * when necessary. The ncarrier-flag is set, whenever DTR goes
553 * low.
554 */
555static void
475be4d8 556isdn_tty_modem_ncarrier(modem_info *info)
1da177e4
LT		 557{
558 if (info->ncarrier) {
559 info->nc_timer.expires = jiffies + HZ;
560 add_timer(&info->nc_timer);
561 }
562}
563
564/*
565 * return the usage calculated by si and layer 2 protocol
566 */
3e206b0a 567static int
1da177e4
LT		 568isdn_calc_usage(int si, int l2)
569{
570 int usg = ISDN_USAGE_MODEM;
571
572#ifdef CONFIG_ISDN_AUDIO
573 if (si == 1) {
475be4d8
JP		 574 switch (l2) {
575 case ISDN_PROTO_L2_MODEM:
576 usg = ISDN_USAGE_MODEM;
577 break;
1da177e4 578#ifdef CONFIG_ISDN_TTY_FAX
475be4d8
JP		 579 case ISDN_PROTO_L2_FAX:
580 usg = ISDN_USAGE_FAX;
581 break;
1da177e4 582#endif
475be4d8
JP		 583 case ISDN_PROTO_L2_TRANS:
584 default:
585 usg = ISDN_USAGE_VOICE;
586 break;
1da177e4
LT		 587 }
588 }
589#endif
475be4d8 590 return (usg);
1da177e4
LT		 591}
592
593/* isdn_tty_dial() performs dialing of a tty an the necessary
594 * setup of the lower levels before that.
595 */
596static void
475be4d8 597isdn_tty_dial(char *n, modem_info *info, atemu *m)
1da177e4
LT		 598{
599 int usg = ISDN_USAGE_MODEM;
600 int si = 7;
601 int l2 = m->mdmreg[REG_L2PROT];
602 u_long flags;
603 isdn_ctrl cmd;
604 int i;
605 int j;
606
607 for (j = 7; j >= 0; j--)
608 if (m->mdmreg[REG_SI1] & (1 << j)) {
609 si = bit2si[j];
610 break;
611 }
612 usg = isdn_calc_usage(si, l2);
613#ifdef CONFIG_ISDN_AUDIO
475be4d8
JP		 614 if ((si == 1) &&
615 (l2 != ISDN_PROTO_L2_MODEM)
1da177e4 616#ifdef CONFIG_ISDN_TTY_FAX
475be4d8 617 && (l2 != ISDN_PROTO_L2_FAX)
1da177e4
LT		 618#endif
619 ) {
620 l2 = ISDN_PROTO_L2_TRANS;
621 usg = ISDN_USAGE_VOICE;
622 }
623#endif
624 m->mdmreg[REG_SI1I] = si2bit[si];
625 spin_lock_irqsave(&dev->lock, flags);
626 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
627 if (i < 0) {
628 spin_unlock_irqrestore(&dev->lock, flags);
629 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
630 } else {
631 info->isdn_driver = dev->drvmap[i];
632 info->isdn_channel = dev->chanmap[i];
633 info->drv_index = i;
634 dev->m_idx[i] = info->line;
635 dev->usage[i] |= ISDN_USAGE_OUTGOING;
636 info->last_dir = 1;
637 strcpy(info->last_num, n);
638 isdn_info_update();
639 spin_unlock_irqrestore(&dev->lock, flags);
640 cmd.driver = info->isdn_driver;
641 cmd.arg = info->isdn_channel;
642 cmd.command = ISDN_CMD_CLREAZ;
643 isdn_command(&cmd);
644 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
645 cmd.driver = info->isdn_driver;
646 cmd.command = ISDN_CMD_SETEAZ;
647 isdn_command(&cmd);
648 cmd.driver = info->isdn_driver;
649 cmd.command = ISDN_CMD_SETL2;
650 info->last_l2 = l2;
651 cmd.arg = info->isdn_channel + (l2 << 8);
652 isdn_command(&cmd);
653 cmd.driver = info->isdn_driver;
654 cmd.command = ISDN_CMD_SETL3;
655 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
656#ifdef CONFIG_ISDN_TTY_FAX
657 if (l2 == ISDN_PROTO_L2_FAX) {
658 cmd.parm.fax = info->fax;
659 info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
660 }
661#endif
662 isdn_command(&cmd);
663 cmd.driver = info->isdn_driver;
664 cmd.arg = info->isdn_channel;
665 sprintf(cmd.parm.setup.phone, "%s", n);
666 sprintf(cmd.parm.setup.eazmsn, "%s",
667 isdn_map_eaz2msn(m->msn, info->isdn_driver));
668 cmd.parm.setup.si1 = si;
669 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
670 cmd.command = ISDN_CMD_DIAL;
671 info->dialing = 1;
672 info->emu.carrierwait = 0;
673 strcpy(dev->num[i], n);
674 isdn_info_update();
675 isdn_command(&cmd);
676 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
677 }
678}
679
680/* isdn_tty_hangup() disassociates a tty from the real
681 * ISDN-line (hangup). The usage-status is cleared
682 * and some cleanup is done also.
683 */
684void
475be4d8 685isdn_tty_modem_hup(modem_info *info, int local)
1da177e4
LT		 686{
687 isdn_ctrl cmd;
688 int di, ch;
689
690 if (!info)
691 return;
692
693 di = info->isdn_driver;
694 ch = info->isdn_channel;
695 if (di < 0 || ch < 0)
696 return;
697
698 info->isdn_driver = -1;
699 info->isdn_channel = -1;
700
701#ifdef ISDN_DEBUG_MODEM_HUP
702 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
703#endif
704 info->rcvsched = 0;
ba43294d 705 isdn_tty_flush_buffer(info->port.tty);
1da177e4
LT		 706 if (info->online) {
707 info->last_lhup = local;
708 info->online = 0;
709 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
710 }
711#ifdef CONFIG_ISDN_AUDIO
712 info->vonline = 0;
713#ifdef CONFIG_ISDN_TTY_FAX
714 info->faxonline = 0;
715 info->fax->phase = ISDN_FAX_PHASE_IDLE;
716#endif
717 info->emu.vpar[4] = 0;
718 info->emu.vpar[5] = 8;
3c7208f2
JJ		 719 kfree(info->dtmf_state);
720 info->dtmf_state = NULL;
721 kfree(info->silence_state);
722 info->silence_state = NULL;
723 kfree(info->adpcms);
724 info->adpcms = NULL;
725 kfree(info->adpcmr);
726 info->adpcmr = NULL;
1da177e4
LT		 727#endif
728 if ((info->msr & UART_MSR_RI) &&
475be4d8 729 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
1da177e4
LT		 730 isdn_tty_modem_result(RESULT_RUNG, info);
731 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
732 info->lsr |= UART_LSR_TEMT;
733
734 if (local) {
735 cmd.driver = di;
736 cmd.command = ISDN_CMD_HANGUP;
737 cmd.arg = ch;
738 isdn_command(&cmd);
739 }
740
741 isdn_all_eaz(di, ch);
742 info->emu.mdmreg[REG_RINGCNT] = 0;
743 isdn_free_channel(di, ch, 0);
744
745 if (info->drv_index >= 0) {
746 dev->m_idx[info->drv_index] = -1;
747 info->drv_index = -1;
748 }
749}
750
751/*
475be4d8 752 * Begin of a CAPI like interface, currently used only for
1da177e4
LT		 753 * supplementary service (CAPI 2.0 part III)
754 */
755#include <linux/isdn/capicmd.h>
07a97fe8 756#include <linux/module.h>
1da177e4
LT		 757
758int
759isdn_tty_capi_facility(capi_msg *cm) {
475be4d8 760 return (-1); /* dummy */
1da177e4
LT		 761}
762
763/* isdn_tty_suspend() tries to suspend the current tty connection
764 */
765static void
475be4d8 766isdn_tty_suspend(char *id, modem_info *info, atemu *m)
1da177e4
LT		 767{
768 isdn_ctrl cmd;
475be4d8 769
1da177e4
LT		 770 int l;
771
772 if (!info)
773 return;
774
775#ifdef ISDN_DEBUG_MODEM_SERVICES
776 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
777#endif
778 l = strlen(id);
779 if ((info->isdn_driver >= 0)) {
475be4d8 780 cmd.parm.cmsg.Length = l + 18;
1da177e4
LT		 781 cmd.parm.cmsg.Command = CAPI_FACILITY;
782 cmd.parm.cmsg.Subcommand = CAPI_REQ;
783 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
784 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
785 cmd.parm.cmsg.para[1] = 0;
786 cmd.parm.cmsg.para[2] = l + 3;
787 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
788 cmd.parm.cmsg.para[4] = 0;
789 cmd.parm.cmsg.para[5] = l;
790 strncpy(&cmd.parm.cmsg.para[6], id, l);
791 cmd.command = CAPI_PUT_MESSAGE;
792 cmd.driver = info->isdn_driver;
793 cmd.arg = info->isdn_channel;
794 isdn_command(&cmd);
795 }
796}
797
798/* isdn_tty_resume() tries to resume a suspended call
25985edc 799 * setup of the lower levels before that. unfortunately here is no
1da177e4
LT		 800 * checking for compatibility of used protocols implemented by Q931
801 * It does the same things like isdn_tty_dial, the last command
802 * is different, may be we can merge it.
803 */
804
805static void
475be4d8 806isdn_tty_resume(char *id, modem_info *info, atemu *m)
1da177e4
LT		 807{
808 int usg = ISDN_USAGE_MODEM;
809 int si = 7;
810 int l2 = m->mdmreg[REG_L2PROT];
811 isdn_ctrl cmd;
812 ulong flags;
813 int i;
814 int j;
815 int l;
816
817 l = strlen(id);
818 for (j = 7; j >= 0; j--)
819 if (m->mdmreg[REG_SI1] & (1 << j)) {
820 si = bit2si[j];
821 break;
822 }
823 usg = isdn_calc_usage(si, l2);
824#ifdef CONFIG_ISDN_AUDIO
475be4d8
JP		 825 if ((si == 1) &&
826 (l2 != ISDN_PROTO_L2_MODEM)
1da177e4 827#ifdef CONFIG_ISDN_TTY_FAX
475be4d8 828 && (l2 != ISDN_PROTO_L2_FAX)
1da177e4
LT		 829#endif
830 ) {
831 l2 = ISDN_PROTO_L2_TRANS;
832 usg = ISDN_USAGE_VOICE;
833 }
834#endif
835 m->mdmreg[REG_SI1I] = si2bit[si];
836 spin_lock_irqsave(&dev->lock, flags);
837 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
838 if (i < 0) {
839 spin_unlock_irqrestore(&dev->lock, flags);
840 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
841 } else {
842 info->isdn_driver = dev->drvmap[i];
843 info->isdn_channel = dev->chanmap[i];
844 info->drv_index = i;
845 dev->m_idx[i] = info->line;
846 dev->usage[i] |= ISDN_USAGE_OUTGOING;
847 info->last_dir = 1;
848// strcpy(info->last_num, n);
849 isdn_info_update();
850 spin_unlock_irqrestore(&dev->lock, flags);
851 cmd.driver = info->isdn_driver;
852 cmd.arg = info->isdn_channel;
853 cmd.command = ISDN_CMD_CLREAZ;
854 isdn_command(&cmd);
855 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
856 cmd.driver = info->isdn_driver;
857 cmd.command = ISDN_CMD_SETEAZ;
858 isdn_command(&cmd);
859 cmd.driver = info->isdn_driver;
860 cmd.command = ISDN_CMD_SETL2;
861 info->last_l2 = l2;
862 cmd.arg = info->isdn_channel + (l2 << 8);
863 isdn_command(&cmd);
864 cmd.driver = info->isdn_driver;
865 cmd.command = ISDN_CMD_SETL3;
866 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
867 isdn_command(&cmd);
868 cmd.driver = info->isdn_driver;
869 cmd.arg = info->isdn_channel;
475be4d8 870 cmd.parm.cmsg.Length = l + 18;
1da177e4
LT		 871 cmd.parm.cmsg.Command = CAPI_FACILITY;
872 cmd.parm.cmsg.Subcommand = CAPI_REQ;
873 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
874 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
875 cmd.parm.cmsg.para[1] = 0;
475be4d8 876 cmd.parm.cmsg.para[2] = l + 3;
1da177e4
LT		 877 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
878 cmd.parm.cmsg.para[4] = 0;
879 cmd.parm.cmsg.para[5] = l;
880 strncpy(&cmd.parm.cmsg.para[6], id, l);
475be4d8 881 cmd.command = CAPI_PUT_MESSAGE;
1da177e4
LT		 882 info->dialing = 1;
883// strcpy(dev->num[i], n);
884 isdn_info_update();
885 isdn_command(&cmd);
886 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
887 }
888}
889
890/* isdn_tty_send_msg() sends a message to a HL driver
891 * This is used for hybrid modem cards to send AT commands to it
892 */
893
894static void
475be4d8 895isdn_tty_send_msg(modem_info *info, atemu *m, char *msg)
1da177e4
LT		 896{
897 int usg = ISDN_USAGE_MODEM;
898 int si = 7;
899 int l2 = m->mdmreg[REG_L2PROT];
900 isdn_ctrl cmd;
901 ulong flags;
902 int i;
903 int j;
904 int l;
905
f3947936
CG		 906 l = min(strlen(msg), sizeof(cmd.parm) - sizeof(cmd.parm.cmsg)
907 + sizeof(cmd.parm.cmsg.para) - 2);
908
1da177e4
LT		 909 if (!l) {
910 isdn_tty_modem_result(RESULT_ERROR, info);
911 return;
912 }
913 for (j = 7; j >= 0; j--)
914 if (m->mdmreg[REG_SI1] & (1 << j)) {
915 si = bit2si[j];
916 break;
917 }
918 usg = isdn_calc_usage(si, l2);
919#ifdef CONFIG_ISDN_AUDIO
475be4d8
JP		 920 if ((si == 1) &&
921 (l2 != ISDN_PROTO_L2_MODEM)
1da177e4 922#ifdef CONFIG_ISDN_TTY_FAX
475be4d8 923 && (l2 != ISDN_PROTO_L2_FAX)
1da177e4
LT		 924#endif
925 ) {
926 l2 = ISDN_PROTO_L2_TRANS;
927 usg = ISDN_USAGE_VOICE;
928 }
929#endif
930 m->mdmreg[REG_SI1I] = si2bit[si];
931 spin_lock_irqsave(&dev->lock, flags);
932 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
933 if (i < 0) {
934 spin_unlock_irqrestore(&dev->lock, flags);
935 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
936 } else {
937 info->isdn_driver = dev->drvmap[i];
938 info->isdn_channel = dev->chanmap[i];
939 info->drv_index = i;
940 dev->m_idx[i] = info->line;
941 dev->usage[i] |= ISDN_USAGE_OUTGOING;
942 info->last_dir = 1;
943 isdn_info_update();
944 spin_unlock_irqrestore(&dev->lock, flags);
945 cmd.driver = info->isdn_driver;
946 cmd.arg = info->isdn_channel;
947 cmd.command = ISDN_CMD_CLREAZ;
948 isdn_command(&cmd);
949 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
950 cmd.driver = info->isdn_driver;
951 cmd.command = ISDN_CMD_SETEAZ;
952 isdn_command(&cmd);
953 cmd.driver = info->isdn_driver;
954 cmd.command = ISDN_CMD_SETL2;
955 info->last_l2 = l2;
956 cmd.arg = info->isdn_channel + (l2 << 8);
957 isdn_command(&cmd);
958 cmd.driver = info->isdn_driver;
959 cmd.command = ISDN_CMD_SETL3;
960 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
961 isdn_command(&cmd);
962 cmd.driver = info->isdn_driver;
963 cmd.arg = info->isdn_channel;
475be4d8 964 cmd.parm.cmsg.Length = l + 14;
1da177e4
LT		 965 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
966 cmd.parm.cmsg.Subcommand = CAPI_REQ;
967 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
475be4d8 968 cmd.parm.cmsg.para[0] = l + 1;
1da177e4 969 strncpy(&cmd.parm.cmsg.para[1], msg, l);
475be4d8
JP		 970 cmd.parm.cmsg.para[l + 1] = 0xd;
971 cmd.command = CAPI_PUT_MESSAGE;
1da177e4
LT		 972/* info->dialing = 1;
973 strcpy(dev->num[i], n);
974 isdn_info_update();
975*/
976 isdn_command(&cmd);
977 }
978}
979
980static inline int
981isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
982{
983#ifdef MODEM_PARANOIA_CHECK
984 if (!info) {
985 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
475be4d8 986 name, routine);
1da177e4
LT		 987 return 1;
988 }
989 if (info->magic != ISDN_ASYNC_MAGIC) {
990 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
991 name, routine);
992 return 1;
993 }
994#endif
995 return 0;
996}
997
998/*
999 * This routine is called to set the UART divisor registers to match
1000 * the specified baud rate for a serial port.
1001 */
1002static void
475be4d8 1003isdn_tty_change_speed(modem_info *info)
1da177e4 1004{
265d6f00 1005 struct tty_port *port = &info->port;
1da177e4 1006 uint cflag,
475be4d8
JP		 1007 cval,
1008 quot;
1da177e4
LT		 1009 int i;
1010
adc8d746 1011 if (!port->tty)
1da177e4 1012 return;
adc8d746 1013 cflag = port->tty->termios.c_cflag;
1da177e4
LT		 1014
1015 quot = i = cflag & CBAUD;
1016 if (i & CBAUDEX) {
1017 i &= ~CBAUDEX;
1018 if (i < 1 || i > 2)
adc8d746 1019 port->tty->termios.c_cflag &= ~CBAUDEX;
1da177e4
LT		 1020 else
1021 i += 15;
1022 }
1023 if (quot) {
1024 info->mcr |= UART_MCR_DTR;
1025 isdn_tty_modem_ncarrier(info);
1026 } else {
1027 info->mcr &= ~UART_MCR_DTR;
1028 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1029#ifdef ISDN_DEBUG_MODEM_HUP
1030 printk(KERN_DEBUG "Mhup in changespeed\n");
1031#endif
1032 if (info->online)
1033 info->ncarrier = 1;
1034 isdn_tty_modem_reset_regs(info, 0);
1035 isdn_tty_modem_hup(info, 1);
1036 }
1037 return;
1038 }
1039 /* byte size and parity */
1040 cval = cflag & (CSIZE | CSTOPB);
1041 cval >>= 4;
1042 if (cflag & PARENB)
1043 cval |= UART_LCR_PARITY;
1044 if (!(cflag & PARODD))
1045 cval |= UART_LCR_EPAR;
1da177e4 1046
2d68655d 1047 tty_port_set_check_carrier(port, ~cflag & CLOCAL);
1da177e4
LT		 1048}
1049
1050static int
475be4d8 1051isdn_tty_startup(modem_info *info)
1da177e4 1052{
d41861ca 1053 if (tty_port_initialized(&info->port))
1da177e4
LT		 1054 return 0;
1055 isdn_lock_drivers();
1056#ifdef ISDN_DEBUG_MODEM_OPEN
1057 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1058#endif
1059 /*
1060 * Now, initialize the UART
1061 */
1062 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
ba43294d
JS		 1063 if (info->port.tty)
1064 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1da177e4
LT		 1065 /*
1066 * and set the speed of the serial port
1067 */
1068 isdn_tty_change_speed(info);
1069
d41861ca 1070 tty_port_set_initialized(&info->port, 1);
1da177e4
LT		 1071 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1072 info->send_outstanding = 0;
1073 return 0;
1074}
1075
1076/*
1077 * This routine will shutdown a serial port; interrupts are disabled, and
1078 * DTR is dropped if the hangup on close termio flag is on.
1079 */
1080static void
475be4d8 1081isdn_tty_shutdown(modem_info *info)
1da177e4 1082{
d41861ca 1083 if (!tty_port_initialized(&info->port))
1da177e4
LT		 1084 return;
1085#ifdef ISDN_DEBUG_MODEM_OPEN
1086 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1087#endif
1088 isdn_unlock_drivers();
1089 info->msr &= ~UART_MSR_RI;
adc8d746 1090 if (!info->port.tty || (info->port.tty->termios.c_cflag & HUPCL)) {
1da177e4
LT		 1091 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1092 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1093 isdn_tty_modem_reset_regs(info, 0);
1094#ifdef ISDN_DEBUG_MODEM_HUP
1095 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1096#endif
1097 isdn_tty_modem_hup(info, 1);
1098 }
1099 }
ba43294d
JS		 1100 if (info->port.tty)
1101 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1da177e4 1102
d41861ca 1103 tty_port_set_initialized(&info->port, 0);
1da177e4
LT		 1104}
1105
1106/* isdn_tty_write() is the main send-routine. It is called from the upper
1107 * levels within the kernel to perform sending data. Depending on the
1108 * online-flag it either directs output to the at-command-interpreter or
1109 * to the lower level. Additional tasks done here:
1110 * - If online, check for escape-sequence (+++)
1111 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1112 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1113 * - If dialing, abort dial.
1114 */
1115static int
475be4d8 1116isdn_tty_write(struct tty_struct *tty, const u_char *buf, int count)
1da177e4
LT		 1117{
1118 int c;
1119 int total = 0;
1120 modem_info *info = (modem_info *) tty->driver_data;
1121 atemu *m = &info->emu;
1122
1123 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1124 return 0;
1125 /* See isdn_tty_senddown() */
1126 atomic_inc(&info->xmit_lock);
1127 while (1) {
1128 c = count;
1129 if (c > info->xmit_size - info->xmit_count)
1130 c = info->xmit_size - info->xmit_count;
1131 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1132 c = dev->drv[info->isdn_driver]->maxbufsize;
1133 if (c <= 0)
1134 break;
1135 if ((info->online > 1)
1136#ifdef CONFIG_ISDN_AUDIO
1137 || (info->vonline & 3)
1138#endif
1139 ) {
1140#ifdef CONFIG_ISDN_AUDIO
1141 if (!info->vonline)
1142#endif
1143 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1144 &(m->pluscount),
1145 &(m->lastplus));
82e46b31 1146 memcpy(&info->port.xmit_buf[info->xmit_count], buf, c);
1da177e4
LT		 1147#ifdef CONFIG_ISDN_AUDIO
1148 if (info->vonline) {
1149 int cc = isdn_tty_handleDLEdown(info, m, c);
1150 if (info->vonline & 2) {
1151 if (!cc) {
1152 /* If DLE decoding results in zero-transmit, but
1153 * c originally was non-zero, do a wakeup.
1154 */
1155 tty_wakeup(tty);
1156 info->msr |= UART_MSR_CTS;
1157 info->lsr |= UART_LSR_TEMT;
1158 }
1159 info->xmit_count += cc;
1160 }
1161 if ((info->vonline & 3) == 1) {
1162 /* Do NOT handle Ctrl-Q or Ctrl-S
1163 * when in full-duplex audio mode.
1164 */
1165 if (isdn_tty_end_vrx(buf, c)) {
1166 info->vonline &= ~1;
1167#ifdef ISDN_DEBUG_MODEM_VOICE
1168 printk(KERN_DEBUG
1169 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1170 info->line);
1171#endif
1172 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1173 }
1174 }
1175 } else
475be4d8
JP		 1176 if (TTY_IS_FCLASS1(info)) {
1177 int cc = isdn_tty_handleDLEdown(info, m, c);
1178
1179 if (info->vonline & 4) { /* ETX seen */
1180 isdn_ctrl c;
1181
1182 c.command = ISDN_CMD_FAXCMD;
1183 c.driver = info->isdn_driver;
1184 c.arg = info->isdn_channel;
1185 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1186 c.parm.aux.subcmd = ETX;
1187 isdn_command(&c);
1188 }
1189 info->vonline = 0;
1da177e4 1190#ifdef ISDN_DEBUG_MODEM_VOICE
475be4d8 1191 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1da177e4 1192#endif
475be4d8
JP		 1193 info->xmit_count += cc;
1194 } else
1da177e4 1195#endif
475be4d8 1196 info->xmit_count += c;
1da177e4
LT		 1197 } else {
1198 info->msr |= UART_MSR_CTS;
1199 info->lsr |= UART_LSR_TEMT;
1200 if (info->dialing) {
1201 info->dialing = 0;
1202#ifdef ISDN_DEBUG_MODEM_HUP
1203 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1204#endif
1205 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1206 isdn_tty_modem_hup(info, 1);
1207 } else
1208 c = isdn_tty_edit_at(buf, c, info);
1209 }
1210 buf += c;
1211 count -= c;
1212 total += c;
1213 }
1214 atomic_dec(&info->xmit_lock);
b03efcfb 1215 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1da177e4
LT		 1216 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1217 isdn_tty_senddown(info);
1218 isdn_tty_tint(info);
1219 }
1220 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1221 }
1222 return total;
1223}
1224
1225static int
1226isdn_tty_write_room(struct tty_struct *tty)
1227{
1228 modem_info *info = (modem_info *) tty->driver_data;
1229 int ret;
1230
1231 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1232 return 0;
1233 if (!info->online)
1234 return info->xmit_size;
1235 ret = info->xmit_size - info->xmit_count;
1236 return (ret < 0) ? 0 : ret;
1237}
1238
1239static int
1240isdn_tty_chars_in_buffer(struct tty_struct *tty)
1241{
1242 modem_info *info = (modem_info *) tty->driver_data;
1243
1244 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1245 return 0;
1246 if (!info->online)
1247 return 0;
1248 return (info->xmit_count);
1249}
1250
1251static void
1252isdn_tty_flush_buffer(struct tty_struct *tty)
1253{
1254 modem_info *info;
1255
1256 if (!tty) {
1257 return;
1258 }
1259 info = (modem_info *) tty->driver_data;
1260 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1261 return;
1262 }
1263 isdn_tty_cleanup_xmit(info);
1264 info->xmit_count = 0;
1da177e4
LT		 1265 tty_wakeup(tty);
1266}
1267
1268static void
1269isdn_tty_flush_chars(struct tty_struct *tty)
1270{
1271 modem_info *info = (modem_info *) tty->driver_data;
1272
1273 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1274 return;
b03efcfb 1275 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1da177e4
LT		 1276 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1277}
1278
1279/*
1280 * ------------------------------------------------------------
1281 * isdn_tty_throttle()
1282 *
1283 * This routine is called by the upper-layer tty layer to signal that
1284 * incoming characters should be throttled.
1285 * ------------------------------------------------------------
1286 */
1287static void
1288isdn_tty_throttle(struct tty_struct *tty)
1289{
1290 modem_info *info = (modem_info *) tty->driver_data;
1291
1292 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1293 return;
1294 if (I_IXOFF(tty))
1295 info->x_char = STOP_CHAR(tty);
1296 info->mcr &= ~UART_MCR_RTS;
1297}
1298
1299static void
1300isdn_tty_unthrottle(struct tty_struct *tty)
1301{
1302 modem_info *info = (modem_info *) tty->driver_data;
1303
1304 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1305 return;
1306 if (I_IXOFF(tty)) {
1307 if (info->x_char)
1308 info->x_char = 0;
1309 else
1310 info->x_char = START_CHAR(tty);
1311 }
1312 info->mcr |= UART_MCR_RTS;
1313}
1314
1315/*
1316 * ------------------------------------------------------------
1317 * isdn_tty_ioctl() and friends
1318 * ------------------------------------------------------------
1319 */
1320
1321/*
1322 * isdn_tty_get_lsr_info - get line status register info
1323 *
1324 * Purpose: Let user call ioctl() to get info when the UART physically
1325 * is emptied. On bus types like RS485, the transmitter must
1326 * release the bus after transmitting. This must be done when
1327 * the transmit shift register is empty, not be done when the
1328 * transmit holding register is empty. This functionality
1329 * allows RS485 driver to be written in user space.
1330 */
1331static int
475be4d8 1332isdn_tty_get_lsr_info(modem_info *info, uint __user *value)
1da177e4
LT		 1333{
1334 u_char status;
1335 uint result;
1336
1337 status = info->lsr;
1338 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1339 return put_user(result, value);
1340}
1341
1342
1343static int
60b33c13 1344isdn_tty_tiocmget(struct tty_struct *tty)
1da177e4
LT		 1345{
1346 modem_info *info = (modem_info *) tty->driver_data;
1347 u_char control, status;
1348
156f1ed6 1349 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1da177e4 1350 return -ENODEV;
18900ca6 1351 if (tty_io_error(tty))
1da177e4
LT		 1352 return -EIO;
1353
72250d44 1354 mutex_lock(&modem_info_mutex);
1da177e4
LT		 1355#ifdef ISDN_DEBUG_MODEM_IOCTL
1356 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1357#endif
1358
1359 control = info->mcr;
1360 status = info->msr;
72250d44 1361 mutex_unlock(&modem_info_mutex);
1da177e4 1362 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
475be4d8
JP		 1363 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1364 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1365 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1366 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1367 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1da177e4
LT		 1368}
1369
1370static int
20b9d177 1371isdn_tty_tiocmset(struct tty_struct *tty,
475be4d8 1372 unsigned int set, unsigned int clear)
1da177e4
LT		 1373{
1374 modem_info *info = (modem_info *) tty->driver_data;
1375
156f1ed6 1376 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1da177e4 1377 return -ENODEV;
18900ca6 1378 if (tty_io_error(tty))
1da177e4
LT		 1379 return -EIO;
1380
1381#ifdef ISDN_DEBUG_MODEM_IOCTL
1382 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1383#endif
1384
72250d44 1385 mutex_lock(&modem_info_mutex);
1da177e4
LT		 1386 if (set & TIOCM_RTS)
1387 info->mcr |= UART_MCR_RTS;
1388 if (set & TIOCM_DTR) {
1389 info->mcr |= UART_MCR_DTR;
1390 isdn_tty_modem_ncarrier(info);
1391 }
1392
1393 if (clear & TIOCM_RTS)
1394 info->mcr &= ~UART_MCR_RTS;
1395 if (clear & TIOCM_DTR) {
1396 info->mcr &= ~UART_MCR_DTR;
1397 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1398 isdn_tty_modem_reset_regs(info, 0);
1399#ifdef ISDN_DEBUG_MODEM_HUP
1400 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1401#endif
1402 if (info->online)
1403 info->ncarrier = 1;
1404 isdn_tty_modem_hup(info, 1);
1405 }
1406 }
72250d44 1407 mutex_unlock(&modem_info_mutex);
1da177e4
LT		 1408 return 0;
1409}
1410
1411static int
6caa76b7 1412isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg)
1da177e4
LT		 1413{
1414 modem_info *info = (modem_info *) tty->driver_data;
1415 int retval;
1416
1417 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1418 return -ENODEV;
18900ca6 1419 if (tty_io_error(tty))
1da177e4
LT		 1420 return -EIO;
1421 switch (cmd) {
475be4d8 1422 case TCSBRK: /* SVID version: non-zero arg --> no break */
1da177e4 1423#ifdef ISDN_DEBUG_MODEM_IOCTL
475be4d8
JP		 1424 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1425#endif
1426 retval = tty_check_change(tty);
1427 if (retval)
1428 return retval;
1429 tty_wait_until_sent(tty, 0);
1430 return 0;
1431 case TCSBRKP: /* support for POSIX tcsendbreak() */
1da177e4 1432#ifdef ISDN_DEBUG_MODEM_IOCTL
475be4d8
JP		 1433 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1434#endif
1435 retval = tty_check_change(tty);
1436 if (retval)
1437 return retval;
1438 tty_wait_until_sent(tty, 0);
1439 return 0;
1440 case TIOCSERGETLSR: /* Get line status register */
1da177e4 1441#ifdef ISDN_DEBUG_MODEM_IOCTL
475be4d8 1442 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1da177e4 1443#endif
475be4d8
JP		 1444 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1445 default:
1da177e4 1446#ifdef ISDN_DEBUG_MODEM_IOCTL
475be4d8 1447 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1da177e4 1448#endif
475be4d8 1449 return -ENOIOCTLCMD;
1da177e4
LT		 1450 }
1451 return 0;
1452}
1453
1454static void
606d099c 1455isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4
LT		 1456{
1457 modem_info *info = (modem_info *) tty->driver_data;
1458
f2d390d2 1459 mutex_lock(&modem_info_mutex);
1da177e4
LT		 1460 if (!old_termios)
1461 isdn_tty_change_speed(info);
1462 else {
adc8d746
AC		 1463 if (tty->termios.c_cflag == old_termios->c_cflag &&
1464 tty->termios.c_ispeed == old_termios->c_ispeed &&
f2d390d2
JJB		 1465 tty->termios.c_ospeed == old_termios->c_ospeed) {
1466 mutex_unlock(&modem_info_mutex);
1da177e4 1467 return;
f2d390d2 1468 }
1da177e4 1469 isdn_tty_change_speed(info);
1da177e4 1470 }
f2d390d2 1471 mutex_unlock(&modem_info_mutex);
1da177e4
LT		 1472}
1473
1474/*
1475 * ------------------------------------------------------------
1476 * isdn_tty_open() and friends
1477 * ------------------------------------------------------------
1478 */
042b9e7c 1479
f7e0405e
JS		 1480static int isdn_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1481{
1482 modem_info *info = &dev->mdm.info[tty->index];
1483
1484 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1485 return -ENODEV;
1486
1487 tty->driver_data = info;
1488
1489 return tty_port_install(&info->port, driver, tty);
1490}
1491
1da177e4
LT		 1492/*
1493 * This routine is called whenever a serial port is opened. It
1494 * enables interrupts for a serial port, linking in its async structure into
1495 * the IRQ chain. It also performs the serial-specific
1496 * initialization for the tty structure.
1497 */
1498static int
1499isdn_tty_open(struct tty_struct *tty, struct file *filp)
1500{
f7e0405e
JS		 1501 modem_info *info = tty->driver_data;
1502 struct tty_port *port = &info->port;
410235fd 1503 int retval;
1da177e4 1504
1da177e4 1505#ifdef ISDN_DEBUG_MODEM_OPEN
475be4d8 1506 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
265d6f00 1507 port->count);
1da177e4 1508#endif
265d6f00 1509 port->count++;
265d6f00 1510 port->tty = tty;
1da177e4
LT		 1511 /*
1512 * Start up serial port
1513 */
1514 retval = isdn_tty_startup(info);
1515 if (retval) {
1516#ifdef ISDN_DEBUG_MODEM_OPEN
1517 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1518#endif
1da177e4
LT		 1519 return retval;
1520 }
875d54aa 1521 retval = tty_port_block_til_ready(port, tty, filp);
1da177e4
LT		 1522 if (retval) {
1523#ifdef ISDN_DEBUG_MODEM_OPEN
1524 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1525#endif
1da177e4
LT		 1526 return retval;
1527 }
1528#ifdef ISDN_DEBUG_MODEM_OPEN
1529 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1530#endif
1531 dev->modempoll++;
1532#ifdef ISDN_DEBUG_MODEM_OPEN
1533 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1534#endif
1535 return 0;
1536}
1537
1538static void
1539isdn_tty_close(struct tty_struct *tty, struct file *filp)
1540{
1541 modem_info *info = (modem_info *) tty->driver_data;
265d6f00 1542 struct tty_port *port = &info->port;
1da177e4
LT		 1543 ulong timeout;
1544
1545 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1546 return;
1547 if (tty_hung_up_p(filp)) {
1548#ifdef ISDN_DEBUG_MODEM_OPEN
1549 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1550#endif
1551 return;
1552 }
265d6f00 1553 if ((tty->count == 1) && (port->count != 1)) {
1da177e4
LT		 1554 /*
1555 * Uh, oh. tty->count is 1, which means that the tty
1556 * structure will be freed. Info->count should always
1557 * be one in these conditions. If it's greater than
1558 * one, we've got real problems, since it means the
1559 * serial port won't be shutdown.
1560 */
1561 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
265d6f00
JS		 1562 "info->count is %d\n", port->count);
1563 port->count = 1;
1da177e4 1564 }
265d6f00 1565 if (--port->count < 0) {
1da177e4 1566 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
265d6f00
JS		 1567 info->line, port->count);
1568 port->count = 0;
1da177e4 1569 }
265d6f00 1570 if (port->count) {
1da177e4
LT		 1571#ifdef ISDN_DEBUG_MODEM_OPEN
1572 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1573#endif
1574 return;
1575 }
a657eecd 1576 info->closing = 1;
1da177e4
LT		 1577
1578 tty->closing = 1;
1579 /*
1580 * At this point we stop accepting input. To do this, we
1581 * disable the receive line status interrupts, and tell the
1582 * interrupt driver to stop checking the data ready bit in the
1583 * line status register.
1584 */
d41861ca 1585 if (tty_port_initialized(port)) {
79c1faa4 1586 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1da177e4
LT		 1587 /*
1588 * Before we drop DTR, make sure the UART transmitter
1589 * has completely drained; this is especially
1590 * important if there is a transmit FIFO!
1591 */
1592 timeout = jiffies + HZ;
1593 while (!(info->lsr & UART_LSR_TEMT)) {
24763c48 1594 schedule_timeout_interruptible(20);
475be4d8 1595 if (time_after(jiffies, timeout))
1da177e4
LT		 1596 break;
1597 }
1598 }
1599 dev->modempoll--;
1600 isdn_tty_shutdown(info);
978e595f 1601 isdn_tty_flush_buffer(tty);
1da177e4 1602 tty_ldisc_flush(tty);
265d6f00 1603 port->tty = NULL;
1da177e4 1604 info->ncarrier = 0;
4330d663
JS		 1605
1606 tty_port_close_end(port, tty);
a657eecd 1607 info->closing = 0;
1da177e4
LT		 1608#ifdef ISDN_DEBUG_MODEM_OPEN
1609 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1610#endif
1611}
1612
1613/*
1614 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1615 */
1616static void
1617isdn_tty_hangup(struct tty_struct *tty)
1618{
1619 modem_info *info = (modem_info *) tty->driver_data;
265d6f00 1620 struct tty_port *port = &info->port;
1da177e4
LT		 1621
1622 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1623 return;
1624 isdn_tty_shutdown(info);
265d6f00 1625 port->count = 0;
807c8d81 1626 tty_port_set_active(port, 0);
265d6f00
JS		 1627 port->tty = NULL;
1628 wake_up_interruptible(&port->open_wait);
1da177e4
LT		 1629}
1630
1631/* This routine initializes all emulator-data.
1632 */
1633static void
475be4d8 1634isdn_tty_reset_profile(atemu *m)
1da177e4
LT		 1635{
1636 m->profile[0] = 0;
1637 m->profile[1] = 0;
1638 m->profile[2] = 43;
1639 m->profile[3] = 13;
1640 m->profile[4] = 10;
1641 m->profile[5] = 8;
1642 m->profile[6] = 3;
1643 m->profile[7] = 60;
1644 m->profile[8] = 2;
1645 m->profile[9] = 6;
1646 m->profile[10] = 7;
1647 m->profile[11] = 70;
1648 m->profile[12] = 0x45;
1649 m->profile[13] = 4;
1650 m->profile[14] = ISDN_PROTO_L2_X75I;
1651 m->profile[15] = ISDN_PROTO_L3_TRANS;
1652 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1653 m->profile[17] = ISDN_MODEM_WINSIZE;
1654 m->profile[18] = 4;
1655 m->profile[19] = 0;
1656 m->profile[20] = 0;
1657 m->profile[23] = 0;
1658 m->pmsn[0] = '\0';
1659 m->plmsn[0] = '\0';
1660}
1661
1662#ifdef CONFIG_ISDN_AUDIO
1663static void
475be4d8 1664isdn_tty_modem_reset_vpar(atemu *m)
1da177e4
LT		 1665{
1666 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1667 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1668 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1669 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1670 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1671 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1672}
1673#endif
1674
1675#ifdef CONFIG_ISDN_TTY_FAX
1676static void
475be4d8 1677isdn_tty_modem_reset_faxpar(modem_info *info)
1da177e4
LT		 1678{
1679 T30_s *f = info->fax;
1680
1681 f->code = 0;
1682 f->phase = ISDN_FAX_PHASE_IDLE;
1683 f->direction = 0;
1684 f->resolution = 1; /* fine */
1685 f->rate = 5; /* 14400 bit/s */
1686 f->width = 0;
1687 f->length = 0;
1688 f->compression = 0;
1689 f->ecm = 0;
1690 f->binary = 0;
1691 f->scantime = 0;
1692 memset(&f->id[0], 32, FAXIDLEN - 1);
1693 f->id[FAXIDLEN - 1] = 0;
1694 f->badlin = 0;
1695 f->badmul = 0;
1696 f->bor = 0;
1697 f->nbc = 0;
1698 f->cq = 0;
1699 f->cr = 0;
1700 f->ctcrty = 0;
1701 f->minsp = 0;
1702 f->phcto = 30;
1703 f->rel = 0;
1704 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1705 f->pollid[FAXIDLEN - 1] = 0;
1706}
1707#endif
1708
1709static void
475be4d8 1710isdn_tty_modem_reset_regs(modem_info *info, int force)
1da177e4
LT		 1711{
1712 atemu *m = &info->emu;
1713 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1714 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1715 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1716 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1717 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1718 }
1719#ifdef CONFIG_ISDN_AUDIO
1720 isdn_tty_modem_reset_vpar(m);
1721#endif
1722#ifdef CONFIG_ISDN_TTY_FAX
1723 isdn_tty_modem_reset_faxpar(info);
1724#endif
1725 m->mdmcmdl = 0;
1726}
1727
1728static void
475be4d8 1729modem_write_profile(atemu *m)
1da177e4
LT		 1730{
1731 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1732 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1733 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1734 if (dev->profd)
1735 send_sig(SIGIO, dev->profd, 1);
1736}
1737
b68e31d0 1738static const struct tty_operations modem_ops = {
f7e0405e 1739 .install = isdn_tty_install,
475be4d8 1740 .open = isdn_tty_open,
1da177e4
LT		 1741 .close = isdn_tty_close,
1742 .write = isdn_tty_write,
1743 .flush_chars = isdn_tty_flush_chars,
1744 .write_room = isdn_tty_write_room,
1745 .chars_in_buffer = isdn_tty_chars_in_buffer,
1746 .flush_buffer = isdn_tty_flush_buffer,
1747 .ioctl = isdn_tty_ioctl,
1748 .throttle = isdn_tty_throttle,
1749 .unthrottle = isdn_tty_unthrottle,
1750 .set_termios = isdn_tty_set_termios,
1751 .hangup = isdn_tty_hangup,
1752 .tiocmget = isdn_tty_tiocmget,
1753 .tiocmset = isdn_tty_tiocmset,
1754};
1755
042b9e7c
JS		 1756static int isdn_tty_carrier_raised(struct tty_port *port)
1757{
1758 modem_info *info = container_of(port, modem_info, port);
1759 return info->msr & UART_MSR_DCD;
1760}
1761
1762static const struct tty_port_operations isdn_tty_port_ops = {
1763 .carrier_raised = isdn_tty_carrier_raised,
1764};
1765
1da177e4
LT		 1766int
1767isdn_tty_modem_init(void)
1768{
1769 isdn_modem_t *m;
1770 int i, retval;
1771 modem_info *info;
1772
1773 m = &dev->mdm;
1774 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1775 if (!m->tty_modem)
1776 return -ENOMEM;
1777 m->tty_modem->name = "ttyI";
1da177e4
LT		 1778 m->tty_modem->major = ISDN_TTY_MAJOR;
1779 m->tty_modem->minor_start = 0;
1780 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1781 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1782 m->tty_modem->init_termios = tty_std_termios;
1783 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
c4d6ebeb 1784 m->tty_modem->flags = TTY_DRIVER_REAL_RAW;
1da177e4
LT		 1785 m->tty_modem->driver_name = "isdn_tty";
1786 tty_set_operations(m->tty_modem, &modem_ops);
1787 retval = tty_register_driver(m->tty_modem);
1788 if (retval) {
1789 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1790 goto err;
1791 }
1792 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1793 info = &m->info[i];
1794#ifdef CONFIG_ISDN_TTY_FAX
1795 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1796 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1797 retval = -ENOMEM;
1798 goto err_unregister;
1799 }
1da177e4 1800#endif
48decc1c 1801 tty_port_init(&info->port);
042b9e7c 1802 info->port.ops = &isdn_tty_port_ops;
1da177e4 1803 spin_lock_init(&info->readlock);
1da177e4
LT		 1804 sprintf(info->last_cause, "0000");
1805 sprintf(info->last_num, "none");
1806 info->last_dir = 0;
1807 info->last_lhup = 1;
1808 info->last_l2 = -1;
1809 info->last_si = 0;
1810 isdn_tty_reset_profile(&info->emu);
1811 isdn_tty_modem_reset_regs(info, 1);
1812 info->magic = ISDN_ASYNC_MAGIC;
1813 info->line = i;
1da177e4 1814 info->x_char = 0;
1da177e4
LT		 1815 info->isdn_driver = -1;
1816 info->isdn_channel = -1;
1817 info->drv_index = -1;
1818 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
e99e88a9 1819 timer_setup(&info->nc_timer, isdn_tty_modem_do_ncarrier, 0);
1da177e4
LT		 1820 skb_queue_head_init(&info->xmit_queue);
1821#ifdef CONFIG_ISDN_AUDIO
1822 skb_queue_head_init(&info->dtmf_queue);
1823#endif
82e46b31
JS		 1824 info->port.xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5,
1825 GFP_KERNEL);
1826 if (!info->port.xmit_buf) {
1da177e4
LT		 1827 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1828 retval = -ENOMEM;
1829 goto err_unregister;
1830 }
1831 /* Make room for T.70 header */
82e46b31 1832 info->port.xmit_buf += 4;
1da177e4
LT		 1833 }
1834 return 0;
1835err_unregister:
1836 for (i--; i >= 0; i--) {
1837 info = &m->info[i];
1838#ifdef CONFIG_ISDN_TTY_FAX
1839 kfree(info->fax);
1840#endif
82e46b31 1841 kfree(info->port.xmit_buf - 4);
191c5f10
JS		 1842 info->port.xmit_buf = NULL;
1843 tty_port_destroy(&info->port);
1da177e4
LT		 1844 }
1845 tty_unregister_driver(m->tty_modem);
475be4d8 1846err:
1da177e4
LT		 1847 put_tty_driver(m->tty_modem);
1848 m->tty_modem = NULL;
1849 return retval;
1850}
1851
1852void
1853isdn_tty_exit(void)
1854{
1855 modem_info *info;
1856 int i;
1857
1858 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1859 info = &dev->mdm.info[i];
1860 isdn_tty_cleanup_xmit(info);
1861#ifdef CONFIG_ISDN_TTY_FAX
1862 kfree(info->fax);
1863#endif
82e46b31 1864 kfree(info->port.xmit_buf - 4);
191c5f10
JS		 1865 info->port.xmit_buf = NULL;
1866 tty_port_destroy(&info->port);
1da177e4
LT		 1867 }
1868 tty_unregister_driver(dev->mdm.tty_modem);
1869 put_tty_driver(dev->mdm.tty_modem);
1870 dev->mdm.tty_modem = NULL;
1871}
1872
1873
1874/*
1875 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1876 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1877 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1878 */
1879
1880static int
1881isdn_tty_match_icall(char *cid, atemu *emu, int di)
1882{
1883#ifdef ISDN_DEBUG_MODEM_ICALL
1884 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1885 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1886 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1887#endif
1888 if (strlen(emu->lmsn)) {
1889 char *p = emu->lmsn;
1890 char *q;
1891 int tmp;
1892 int ret = 0;
1893
1894 while (1) {
1895 if ((q = strchr(p, ';')))
1896 *q = '\0';
1897 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
1898 ret = tmp;
1899#ifdef ISDN_DEBUG_MODEM_ICALL
1900 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
1901 p, isdn_map_eaz2msn(emu->msn, di), tmp);
1902#endif
1903 if (q) {
1904 *q = ';';
1905 p = q;
1906 p++;
1907 }
1908 if (!tmp)
1909 return 0;
1910 if (!q)
1911 break;
1912 }
1913 return ret;
1914 } else {
1915 int tmp;
1916 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
1917#ifdef ISDN_DEBUG_MODEM_ICALL
475be4d8
JP		 1918 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
1919 isdn_map_eaz2msn(emu->msn, di), tmp);
1da177e4
LT		 1920#endif
1921 return tmp;
1922 }
1923}
1924
1925/*
1926 * An incoming call-request has arrived.
1927 * Search the tty-devices for an appropriate device and bind
1928 * it to the ISDN-Channel.
1929 * Return:
1930 *
1931 * 0 = No matching device found.
1932 * 1 = A matching device found.
1933 * 3 = No match found, but eventually would match, if
1934 * CID is longer.
1935 */
1936int
1937isdn_tty_find_icall(int di, int ch, setup_parm *setup)
1938{
1939 char *eaz;
1940 int i;
1941 int wret;
1942 int idx;
1943 int si1;
1944 int si2;
1945 char *nr;
1946 ulong flags;
1947
1948 if (!setup->phone[0]) {
1949 nr = "0";
1950 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
1951 } else
1952 nr = setup->phone;
1953 si1 = (int) setup->si1;
1954 si2 = (int) setup->si2;
1955 if (!setup->eazmsn[0]) {
1956 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
1957 eaz = "0";
1958 } else
1959 eaz = setup->eazmsn;
1960#ifdef ISDN_DEBUG_MODEM_ICALL
1961 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
1962#endif
1963 wret = 0;
1964 spin_lock_irqsave(&dev->lock, flags);
1965 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1966 modem_info *info = &dev->mdm.info[i];
1967
1b05f030 1968 if (info->port.count == 0)
475be4d8 1969 continue;
1da177e4
LT		 1970 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
1971 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
1972 idx = isdn_dc2minor(di, ch);
1973#ifdef ISDN_DEBUG_MODEM_ICALL
1974 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
1975 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
48decc1c
JS		 1976 info->port.flags, info->isdn_driver,
1977 info->isdn_channel, dev->usage[idx]);
1da177e4
LT		 1978#endif
1979 if (
1980#ifndef FIX_FILE_TRANSFER
807c8d81 1981 tty_port_active(&info->port) &&
1da177e4
LT		 1982#endif
1983 (info->isdn_driver == -1) &&
1984 (info->isdn_channel == -1) &&
1985 (USG_NONE(dev->usage[idx]))) {
1986 int matchret;
1987
1988 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
1989 wret = matchret;
1990 if (!matchret) { /* EAZ is matching */
1991 info->isdn_driver = di;
1992 info->isdn_channel = ch;
1993 info->drv_index = idx;
1994 dev->m_idx[idx] = info->line;
1995 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
475be4d8 1996 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
1da177e4
LT		 1997 strcpy(dev->num[idx], nr);
1998 strcpy(info->emu.cpn, eaz);
1999 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2000 info->emu.mdmreg[REG_PLAN] = setup->plan;
2001 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2002 isdn_info_update();
2003 spin_unlock_irqrestore(&dev->lock, flags);
2004 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2005 info->line);
2006 info->msr |= UART_MSR_RI;
2007 isdn_tty_modem_result(RESULT_RING, info);
2008 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2009 return 1;
2010 }
2011 }
2012 }
2013 }
2014 spin_unlock_irqrestore(&dev->lock, flags);
2015 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
475be4d8
JP		 2016 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2)) ? "rejected" : "ignored");
2017 return (wret == 2) ? 3 : 0;
1da177e4
LT		 2018}
2019
1da177e4
LT		 2020int
2021isdn_tty_stat_callback(int i, isdn_ctrl *c)
2022{
2023 int mi;
2024 modem_info *info;
2025 char *e;
2026
2027 if (i < 0)
2028 return 0;
2029 if ((mi = dev->m_idx[i]) >= 0) {
2030 info = &dev->mdm.info[mi];
2031 switch (c->command) {
475be4d8
JP		 2032 case ISDN_STAT_CINF:
2033 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2034 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2035 if (e == (char *)c->parm.num)
2036 info->emu.charge = 0;
2037
2038 break;
2039 case ISDN_STAT_BSENT:
1da177e4 2040#ifdef ISDN_TTY_STAT_DEBUG
475be4d8 2041 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
1da177e4 2042#endif
475be4d8
JP		 2043 if ((info->isdn_driver == c->driver) &&
2044 (info->isdn_channel == c->arg)) {
2045 info->msr |= UART_MSR_CTS;
2046 if (info->send_outstanding)
2047 if (!(--info->send_outstanding))
2048 info->lsr |= UART_LSR_TEMT;
2049 isdn_tty_tint(info);
1da177e4 2050 return 1;
475be4d8
JP		 2051 }
2052 break;
2053 case ISDN_STAT_CAUSE:
1da177e4 2054#ifdef ISDN_TTY_STAT_DEBUG
475be4d8
JP		 2055 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2056#endif
2057 /* Signal cause to tty-device */
2058 strncpy(info->last_cause, c->parm.num, 5);
2059 return 1;
2060 case ISDN_STAT_DISPLAY:
1da177e4 2061#ifdef ISDN_TTY_STAT_DEBUG
475be4d8 2062 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
1da177e4 2063#endif
475be4d8
JP		 2064 /* Signal display to tty-device */
2065 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2066 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2067 isdn_tty_at_cout("\r\n", info);
2068 isdn_tty_at_cout("DISPLAY: ", info);
2069 isdn_tty_at_cout(c->parm.display, info);
2070 isdn_tty_at_cout("\r\n", info);
2071 }
2072 return 1;
2073 case ISDN_STAT_DCONN:
2074#ifdef ISDN_TTY_STAT_DEBUG
2075 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2076#endif
807c8d81 2077 if (tty_port_active(&info->port)) {
475be4d8
JP		 2078 if (info->dialing == 1) {
2079 info->dialing = 2;
2080 return 1;
1da177e4 2081 }
475be4d8
JP		 2082 }
2083 break;
2084 case ISDN_STAT_DHUP:
1da177e4 2085#ifdef ISDN_TTY_STAT_DEBUG
475be4d8 2086 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
1da177e4 2087#endif
807c8d81 2088 if (tty_port_active(&info->port)) {
475be4d8
JP		 2089 if (info->dialing == 1)
2090 isdn_tty_modem_result(RESULT_BUSY, info);
2091 if (info->dialing > 1)
2092 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2093 info->dialing = 0;
1da177e4 2094#ifdef ISDN_DEBUG_MODEM_HUP
475be4d8 2095 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
1da177e4 2096#endif
475be4d8
JP		 2097 isdn_tty_modem_hup(info, 0);
2098 return 1;
2099 }
2100 break;
2101 case ISDN_STAT_BCONN:
1da177e4 2102#ifdef ISDN_TTY_STAT_DEBUG
475be4d8
JP		 2103 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2104#endif
2105 /* Wake up any processes waiting
2106 * for incoming call of this device when
2107 * DCD follow the state of incoming carrier
2108 */
1b05f030 2109 if (info->port.blocked_open &&
475be4d8 2110 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
c6e92b63 2111 wake_up_interruptible(&info->port.open_wait);
475be4d8 2112 }
1da177e4 2113
475be4d8
JP		 2114 /* Schedule CONNECT-Message to any tty
2115 * waiting for it and
2116 * set DCD-bit of its modem-status.
2117 */
807c8d81 2118 if (tty_port_active(&info->port) ||
1b05f030
JS		 2119 (info->port.blocked_open &&
2120 (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
475be4d8
JP		 2121 info->msr |= UART_MSR_DCD;
2122 info->emu.charge = 0;
2123 if (info->dialing & 0xf)
2124 info->last_dir = 1;
2125 else
2126 info->last_dir = 0;
2127 info->dialing = 0;
2128 info->rcvsched = 1;
2129 if (USG_MODEM(dev->usage[i])) {
2130 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2131 strcpy(info->emu.connmsg, c->parm.num);
2132 isdn_tty_modem_result(RESULT_CONNECT, info);
2133 } else
2134 isdn_tty_modem_result(RESULT_CONNECT64000, info);
1da177e4 2135 }
475be4d8
JP		 2136 if (USG_VOICE(dev->usage[i]))
2137 isdn_tty_modem_result(RESULT_VCON, info);
2138 return 1;
2139 }
2140 break;
2141 case ISDN_STAT_BHUP:
1da177e4 2142#ifdef ISDN_TTY_STAT_DEBUG
475be4d8 2143 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
1da177e4 2144#endif
807c8d81 2145 if (tty_port_active(&info->port)) {
1da177e4 2146#ifdef ISDN_DEBUG_MODEM_HUP
475be4d8 2147 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
1da177e4 2148#endif
475be4d8
JP		 2149 isdn_tty_modem_hup(info, 0);
2150 return 1;
2151 }
2152 break;
2153 case ISDN_STAT_NODCH:
1da177e4 2154#ifdef ISDN_TTY_STAT_DEBUG
475be4d8
JP		 2155 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2156#endif
807c8d81 2157 if (tty_port_active(&info->port)) {
475be4d8
JP		 2158 if (info->dialing) {
2159 info->dialing = 0;
2160 info->last_l2 = -1;
2161 info->last_si = 0;
2162 sprintf(info->last_cause, "0000");
2163 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
1da177e4 2164 }
475be4d8
JP		 2165 isdn_tty_modem_hup(info, 0);
2166 return 1;
2167 }
2168 break;
2169 case ISDN_STAT_UNLOAD:
1da177e4 2170#ifdef ISDN_TTY_STAT_DEBUG
475be4d8 2171 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
1da177e4 2172#endif
475be4d8
JP		 2173 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2174 info = &dev->mdm.info[i];
2175 if (info->isdn_driver == c->driver) {
2176 if (info->online)
2177 isdn_tty_modem_hup(info, 1);
1da177e4 2178 }
475be4d8
JP		 2179 }
2180 return 1;
1da177e4 2181#ifdef CONFIG_ISDN_TTY_FAX
475be4d8 2182 case ISDN_STAT_FAXIND:
807c8d81 2183 if (tty_port_active(&info->port)) {
475be4d8
JP		 2184 isdn_tty_fax_command(info, c);
2185 }
2186 break;
1da177e4
LT		 2187#endif
2188#ifdef CONFIG_ISDN_AUDIO
475be4d8 2189 case ISDN_STAT_AUDIO:
807c8d81 2190 if (tty_port_active(&info->port)) {
475be4d8
JP		 2191 switch (c->parm.num[0]) {
2192 case ISDN_AUDIO_DTMF:
2193 if (info->vonline) {
2194 isdn_audio_put_dle_code(info,
1da177e4 2195 c->parm.num[1]);
1da177e4 2196 }
475be4d8 2197 break;
1da177e4 2198 }
475be4d8
JP		 2199 }
2200 break;
1da177e4
LT		 2201#endif
2202 }
2203 }
2204 return 0;
2205}
2206
2207/*********************************************************************
2208 Modem-Emulator-Routines
475be4d8 2209*********************************************************************/
1da177e4 2210
475be4d8 2211#define cmdchar(c) ((c >= ' ') && (c <= 0x7f))
1da177e4
LT		 2212
2213/*
2214 * Put a message from the AT-emulator into receive-buffer of tty,
2215 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2216 */
2217void
475be4d8 2218isdn_tty_at_cout(char *msg, modem_info *info)
1da177e4 2219{
227434f8 2220 struct tty_port *port = &info->port;
1da177e4
LT		 2221 atemu *m = &info->emu;
2222 char *p;
2223 char c;
2224 u_long flags;
2225 struct sk_buff *skb = NULL;
2226 char *sp = NULL;
1f4d4a80 2227 int l;
1da177e4
LT		 2228
2229 if (!msg) {
2230 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2231 return;
2232 }
1f4d4a80
AB		 2233
2234 l = strlen(msg);
2235
1da177e4 2236 spin_lock_irqsave(&info->readlock, flags);
a657eecd 2237 if (info->closing) {
1da177e4
LT		 2238 spin_unlock_irqrestore(&info->readlock, flags);
2239 return;
2240 }
2241
33f0f88f
AC		 2242 /* use queue instead of direct, if online and */
2243 /* data is in queue or buffer is full */
227434f8 2244 if (info->online && ((tty_buffer_request_room(port, l) < l) ||
475be4d8 2245 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
33f0f88f 2246 skb = alloc_skb(l, GFP_ATOMIC);
1da177e4
LT		 2247 if (!skb) {
2248 spin_unlock_irqrestore(&info->readlock, flags);
2249 return;
2250 }
33f0f88f 2251 sp = skb_put(skb, l);
1da177e4
LT		 2252#ifdef CONFIG_ISDN_AUDIO
2253 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2254 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2255#endif
2256 }
2257
2258 for (p = msg; *p; p++) {
2259 switch (*p) {
475be4d8
JP		 2260 case '\r':
2261 c = m->mdmreg[REG_CR];
2262 break;
2263 case '\n':
2264 c = m->mdmreg[REG_LF];
2265 break;
2266 case '\b':
2267 c = m->mdmreg[REG_BS];
2268 break;
2269 default:
2270 c = *p;
1da177e4
LT		 2271 }
2272 if (skb) {
2273 *sp++ = c;
2274 } else {
92a19f9c 2275 if (tty_insert_flip_char(port, c, TTY_NORMAL) == 0)
1da177e4 2276 break;
1da177e4
LT		 2277 }
2278 }
2279 if (skb) {
2280 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2281 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2282 spin_unlock_irqrestore(&info->readlock, flags);
2283 /* Schedule dequeuing */
33f0f88f 2284 if (dev->modempoll && info->rcvsched)
1da177e4
LT		 2285 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2286
2287 } else {
2288 spin_unlock_irqrestore(&info->readlock, flags);
2e124b4a 2289 tty_flip_buffer_push(port);
1da177e4
LT		 2290 }
2291}
2292
2293/*
2294 * Perform ATH Hangup
2295 */
2296static void
475be4d8 2297isdn_tty_on_hook(modem_info *info)
1da177e4
LT		 2298{
2299 if (info->isdn_channel >= 0) {
2300#ifdef ISDN_DEBUG_MODEM_HUP
2301 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2302#endif
2303 isdn_tty_modem_hup(info, 1);
2304 }
2305}
2306
2307static void
2308isdn_tty_off_hook(void)
2309{
2310 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2311}
2312
475be4d8
JP		 2313#define PLUSWAIT1 (HZ / 2) /* 0.5 sec. */
2314#define PLUSWAIT2 (HZ * 3 / 2) /* 1.5 sec */
1da177e4
LT		 2315
2316/*
2317 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2318 * isdn_tty_modem_escape() if sequence found.
2319 *
2320 * Parameters:
2321 * p pointer to databuffer
2322 * plus escape-character
2323 * count length of buffer
2324 * pluscount count of valid escape-characters so far
2325 * lastplus timestamp of last character
2326 */
2327static void
475be4d8 2328isdn_tty_check_esc(const u_char *p, u_char plus, int count, int *pluscount,
1da177e4
LT		 2329 u_long *lastplus)
2330{
2331 if (plus > 127)
2332 return;
2333 if (count > 3) {
2334 p += count - 3;
2335 count = 3;
2336 *pluscount = 0;
2337 }
2338 while (count > 0) {
2339 if (*(p++) == plus) {
2340 if ((*pluscount)++) {
2341 /* Time since last '+' > 0.5 sec. ? */
2342 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2343 *pluscount = 1;
2344 } else {
2345 /* Time since last non-'+' < 1.5 sec. ? */
2346 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2347 *pluscount = 0;
2348 }
2349 if ((*pluscount == 3) && (count == 1))
2350 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2351 if (*pluscount > 3)
2352 *pluscount = 1;
2353 } else
2354 *pluscount = 0;
2355 *lastplus = jiffies;
2356 count--;
2357 }
2358}
2359
2360/*
2361 * Return result of AT-emulator to tty-receive-buffer, depending on
2362 * modem-register 12, bit 0 and 1.
2363 * For CONNECT-messages also switch to online-mode.
2364 * For RING-message handle auto-ATA if register 0 != 0
2365 */
2366
2367static void
475be4d8 2368isdn_tty_modem_result(int code, modem_info *info)
1da177e4
LT		 2369{
2370 atemu *m = &info->emu;
2371 static char *msg[] =
475be4d8
JP		 2372 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2373 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2374 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2375 char s[ISDN_MSNLEN + 10];
1da177e4
LT		 2376
2377 switch (code) {
475be4d8
JP		 2378 case RESULT_RING:
2379 m->mdmreg[REG_RINGCNT]++;
2380 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2381 /* Automatically accept incoming call */
2382 isdn_tty_cmd_ATA(info);
2383 break;
2384 case RESULT_NO_CARRIER:
1da177e4 2385#ifdef ISDN_DEBUG_MODEM_HUP
475be4d8 2386 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
a657eecd 2387 info->closing, !info->port.tty);
475be4d8
JP		 2388#endif
2389 m->mdmreg[REG_RINGCNT] = 0;
2390 del_timer(&info->nc_timer);
2391 info->ncarrier = 0;
a657eecd 2392 if (info->closing || !info->port.tty)
475be4d8 2393 return;
6776a2f0 2394
1da177e4 2395#ifdef CONFIG_ISDN_AUDIO
475be4d8 2396 if (info->vonline & 1) {
1da177e4 2397#ifdef ISDN_DEBUG_MODEM_VOICE
475be4d8
JP		 2398 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2399 info->line);
1da177e4 2400#endif
475be4d8
JP		 2401 /* voice-recording, add DLE-ETX */
2402 isdn_tty_at_cout("\020\003", info);
2403 }
2404 if (info->vonline & 2) {
1da177e4 2405#ifdef ISDN_DEBUG_MODEM_VOICE
475be4d8
JP		 2406 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2407 info->line);
1da177e4 2408#endif
475be4d8
JP		 2409 /* voice-playing, add DLE-DC4 */
2410 isdn_tty_at_cout("\020\024", info);
2411 }
1da177e4 2412#endif
475be4d8
JP		 2413 break;
2414 case RESULT_CONNECT:
2415 case RESULT_CONNECT64000:
2416 sprintf(info->last_cause, "0000");
2417 if (!info->online)
2418 info->online = 2;
2419 break;
2420 case RESULT_VCON:
1da177e4 2421#ifdef ISDN_DEBUG_MODEM_VOICE
475be4d8
JP		 2422 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2423 info->line);
1da177e4 2424#endif
475be4d8
JP		 2425 sprintf(info->last_cause, "0000");
2426 if (!info->online)
2427 info->online = 1;
2428 break;
2429 } /* switch (code) */
1da177e4
LT		 2430
2431 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2432 /* Show results */
2433 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2434 /* Show numeric results only */
2435 sprintf(s, "\r\n%d\r\n", code);
2436 isdn_tty_at_cout(s, info);
2437 } else {
2438 if (code == RESULT_RING) {
475be4d8
JP		 2439 /* return if "show RUNG" and ringcounter>1 */
2440 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
1da177e4 2441 (m->mdmreg[REG_RINGCNT] > 1))
475be4d8
JP		 2442 return;
2443 /* print CID, _before_ _every_ ring */
2444 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2445 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2446 isdn_tty_at_cout(dev->num[info->drv_index], info);
2447 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2448 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2449 isdn_tty_at_cout(info->emu.cpn, info);
2450 }
2451 }
1da177e4
LT		 2452 }
2453 isdn_tty_at_cout("\r\n", info);
2454 isdn_tty_at_cout(msg[code], info);
2455 switch (code) {
475be4d8
JP		 2456 case RESULT_CONNECT:
2457 switch (m->mdmreg[REG_L2PROT]) {
2458 case ISDN_PROTO_L2_MODEM:
2459 isdn_tty_at_cout(" ", info);
2460 isdn_tty_at_cout(m->connmsg, info);
1da177e4 2461 break;
475be4d8
JP		 2462 }
2463 break;
2464 case RESULT_RING:
2465 /* Append CPN, if enabled */
2466 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2467 sprintf(s, "/%s", m->cpn);
2468 isdn_tty_at_cout(s, info);
2469 }
2470 /* Print CID only once, _after_ 1st RING */
2471 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2472 (m->mdmreg[REG_RINGCNT] == 1)) {
2473 isdn_tty_at_cout("\r\n", info);
2474 isdn_tty_at_cout("CALLER NUMBER: ", info);
2475 isdn_tty_at_cout(dev->num[info->drv_index], info);
2476 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2477 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2478 isdn_tty_at_cout(info->emu.cpn, info);
1da177e4 2479 }
475be4d8
JP		 2480 }
2481 break;
2482 case RESULT_NO_CARRIER:
2483 case RESULT_NO_DIALTONE:
2484 case RESULT_BUSY:
2485 case RESULT_NO_ANSWER:
2486 m->mdmreg[REG_RINGCNT] = 0;
2487 /* Append Cause-Message if enabled */
2488 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2489 sprintf(s, "/%s", info->last_cause);
2490 isdn_tty_at_cout(s, info);
2491 }
2492 break;
2493 case RESULT_CONNECT64000:
2494 /* Append Protocol to CONNECT message */
2495 switch (m->mdmreg[REG_L2PROT]) {
2496 case ISDN_PROTO_L2_X75I:
2497 case ISDN_PROTO_L2_X75UI:
2498 case ISDN_PROTO_L2_X75BUI:
2499 isdn_tty_at_cout("/X.75", info);
1da177e4 2500 break;
475be4d8
JP		 2501 case ISDN_PROTO_L2_HDLC:
2502 isdn_tty_at_cout("/HDLC", info);
1da177e4 2503 break;
475be4d8
JP		 2504 case ISDN_PROTO_L2_V11096:
2505 isdn_tty_at_cout("/V110/9600", info);
2506 break;
2507 case ISDN_PROTO_L2_V11019:
2508 isdn_tty_at_cout("/V110/19200", info);
2509 break;
2510 case ISDN_PROTO_L2_V11038:
2511 isdn_tty_at_cout("/V110/38400", info);
1da177e4 2512 break;
475be4d8
JP		 2513 }
2514 if (m->mdmreg[REG_T70] & BIT_T70) {
2515 isdn_tty_at_cout("/T.70", info);
2516 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2517 isdn_tty_at_cout("+", info);
2518 }
2519 break;
1da177e4
LT		 2520 }
2521 isdn_tty_at_cout("\r\n", info);
2522 }
2523 }
2524 if (code == RESULT_NO_CARRIER) {
a657eecd 2525 if (info->closing || (!info->port.tty))
1da177e4 2526 return;
6776a2f0 2527
2d68655d 2528 if (tty_port_check_carrier(&info->port))
ba43294d 2529 tty_hangup(info->port.tty);
1da177e4
LT		 2530 }
2531}
2532
2533
2534/*
2535 * Display a modem-register-value.
2536 */
2537static void
475be4d8 2538isdn_tty_show_profile(int ridx, modem_info *info)
1da177e4
LT		 2539{
2540 char v[6];
2541
2542 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2543 isdn_tty_at_cout(v, info);
2544}
2545
2546/*
2547 * Get MSN-string from char-pointer, set pointer to end of number
2548 */
2549static void
2550isdn_tty_get_msnstr(char *n, char **p)
2551{
2552 int limit = ISDN_MSNLEN - 1;
2553
2554 while (((*p[0] >= '0' && *p[0] <= '9') ||
2555 /* Why a comma ??? */
2556 (*p[0] == ',') || (*p[0] == ':')) &&
475be4d8 2557 (limit--))
1da177e4
LT		 2558 *n++ = *p[0]++;
2559 *n = '\0';
2560}
2561
2562/*
2563 * Get phone-number from modem-commandbuffer
2564 */
2565static void
475be4d8 2566isdn_tty_getdial(char *p, char *q, int cnt)
1da177e4
LT		 2567{
2568 int first = 1;
2569 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
475be4d8 2570 buffer overflow */
1da177e4 2571
475be4d8 2572 while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt > 0) {
1da177e4 2573 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
924ad158 2574 ((*p == 'R') && first) ||
1da177e4
LT		 2575 (*p == '*') || (*p == '#')) {
2576 *q++ = *p;
2577 limit--;
2578 }
475be4d8 2579 if (!limit)
1da177e4
LT		 2580 break;
2581 p++;
2582 first = 0;
2583 }
2584 *q = 0;
2585}
2586
2587#define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2588#define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2589
2590static void
475be4d8 2591isdn_tty_report(modem_info *info)
1da177e4
LT		 2592{
2593 atemu *m = &info->emu;
2594 char s[80];
2595
2596 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2597 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2598 isdn_tty_at_cout(s, info);
2599 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2600 isdn_tty_at_cout(s, info);
2601 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2602 switch (info->last_l2) {
475be4d8
JP		 2603 case ISDN_PROTO_L2_X75I:
2604 isdn_tty_at_cout("X.75i", info);
2605 break;
2606 case ISDN_PROTO_L2_X75UI:
2607 isdn_tty_at_cout("X.75ui", info);
2608 break;
2609 case ISDN_PROTO_L2_X75BUI:
2610 isdn_tty_at_cout("X.75bui", info);
2611 break;
2612 case ISDN_PROTO_L2_HDLC:
2613 isdn_tty_at_cout("HDLC", info);
2614 break;
2615 case ISDN_PROTO_L2_V11096:
2616 isdn_tty_at_cout("V.110 9600 Baud", info);
2617 break;
2618 case ISDN_PROTO_L2_V11019:
2619 isdn_tty_at_cout("V.110 19200 Baud", info);
2620 break;
2621 case ISDN_PROTO_L2_V11038:
2622 isdn_tty_at_cout("V.110 38400 Baud", info);
2623 break;
2624 case ISDN_PROTO_L2_TRANS:
2625 isdn_tty_at_cout("transparent", info);
2626 break;
2627 case ISDN_PROTO_L2_MODEM:
2628 isdn_tty_at_cout("modem", info);
2629 break;
2630 case ISDN_PROTO_L2_FAX:
2631 isdn_tty_at_cout("fax", info);
2632 break;
2633 default:
2634 isdn_tty_at_cout("unknown", info);
2635 break;
1da177e4
LT		 2636 }
2637 if (m->mdmreg[REG_T70] & BIT_T70) {
2638 isdn_tty_at_cout("/T.70", info);
2639 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2640 isdn_tty_at_cout("+", info);
2641 }
2642 isdn_tty_at_cout("\r\n", info);
2643 isdn_tty_at_cout(" Service: ", info);
2644 switch (info->last_si) {
475be4d8
JP		 2645 case 1:
2646 isdn_tty_at_cout("audio\r\n", info);
2647 break;
2648 case 5:
2649 isdn_tty_at_cout("btx\r\n", info);
2650 break;
2651 case 7:
2652 isdn_tty_at_cout("data\r\n", info);
2653 break;
2654 default:
2655 sprintf(s, "%d\r\n", info->last_si);
2656 isdn_tty_at_cout(s, info);
2657 break;
1da177e4
LT		 2658 }
2659 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2660 isdn_tty_at_cout(s, info);
2661 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2662 isdn_tty_at_cout(s, info);
2663}
2664
2665/*
2666 * Parse AT&.. commands.
2667 */
2668static int
475be4d8 2669isdn_tty_cmd_ATand(char **p, modem_info *info)
1da177e4
LT		 2670{
2671 atemu *m = &info->emu;
2672 int i;
2673 char rb[100];
2674
2675#define MAXRB (sizeof(rb) - 1)
2676
2677 switch (*p[0]) {
475be4d8
JP		 2678 case 'B':
2679 /* &B - Set Buffersize */
2680 p[0]++;
2681 i = isdn_getnum(p);
2682 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2683 PARSE_ERROR1;
1da177e4 2684#ifdef CONFIG_ISDN_AUDIO
475be4d8
JP		 2685 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2686 PARSE_ERROR1;
1da177e4 2687#endif
475be4d8
JP		 2688 m->mdmreg[REG_PSIZE] = i / 16;
2689 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2690 switch (m->mdmreg[REG_L2PROT]) {
2691 case ISDN_PROTO_L2_V11096:
2692 case ISDN_PROTO_L2_V11019:
2693 case ISDN_PROTO_L2_V11038:
2694 info->xmit_size /= 10;
2695 }
2696 break;
2697 case 'C':
2698 /* &C - DCD Status */
2699 p[0]++;
2700 switch (isdn_getnum(p)) {
2701 case 0:
2702 m->mdmreg[REG_DCD] &= ~BIT_DCD;
1da177e4 2703 break;
475be4d8
JP		 2704 case 1:
2705 m->mdmreg[REG_DCD] |= BIT_DCD;
1da177e4 2706 break;
475be4d8
JP		 2707 default:
2708 PARSE_ERROR1
2709 }
2710 break;
2711 case 'D':
2712 /* &D - Set DTR-Low-behavior */
2713 p[0]++;
2714 switch (isdn_getnum(p)) {
2715 case 0:
2716 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2717 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
1da177e4 2718 break;
475be4d8
JP		 2719 case 2:
2720 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2721 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2722 break;
2723 case 3:
2724 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2725 m->mdmreg[REG_DTRR] |= BIT_DTRR;
1da177e4 2726 break;
475be4d8
JP		 2727 default:
2728 PARSE_ERROR1
2729 }
2730 break;
2731 case 'E':
2732 /* &E -Set EAZ/MSN */
2733 p[0]++;
2734 isdn_tty_get_msnstr(m->msn, p);
2735 break;
2736 case 'F':
2737 /* &F -Set Factory-Defaults */
2738 p[0]++;
2739 if (info->msr & UART_MSR_DCD)
2740 PARSE_ERROR1;
2741 isdn_tty_reset_profile(m);
2742 isdn_tty_modem_reset_regs(info, 1);
2743 break;
1da177e4 2744#ifdef DUMMY_HAYES_AT
475be4d8
JP		 2745 case 'K':
2746 /* only for be compilant with common scripts */
2747 /* &K Flowcontrol - no function */
2748 p[0]++;
2749 isdn_getnum(p);
2750 break;
2751#endif
2752 case 'L':
2753 /* &L -Set Numbers to listen on */
2754 p[0]++;
2755 i = 0;
2756 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2757 (i < ISDN_LMSNLEN - 1))
2758 m->lmsn[i++] = *p[0]++;
2759 m->lmsn[i] = '\0';
2760 break;
2761 case 'R':
2762 /* &R - Set V.110 bitrate adaption */
2763 p[0]++;
2764 i = isdn_getnum(p);
2765 switch (i) {
2766 case 0:
2767 /* Switch off V.110, back to X.75 */
2768 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2769 m->mdmreg[REG_SI2] = 0;
2770 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1da177e4 2771 break;
475be4d8
JP		 2772 case 9600:
2773 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2774 m->mdmreg[REG_SI2] = 197;
2775 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
1da177e4 2776 break;
475be4d8
JP		 2777 case 19200:
2778 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2779 m->mdmreg[REG_SI2] = 199;
2780 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
1da177e4 2781 break;
475be4d8
JP		 2782 case 38400:
2783 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2784 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2785 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
1da177e4 2786 break;
475be4d8
JP		 2787 default:
2788 PARSE_ERROR1;
2789 }
2790 /* Switch off T.70 */
2791 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2792 /* Set Service 7 */
2793 m->mdmreg[REG_SI1] |= 4;
2794 break;
2795 case 'S':
2796 /* &S - Set Windowsize */
2797 p[0]++;
2798 i = isdn_getnum(p);
2799 if ((i > 0) && (i < 9))
2800 m->mdmreg[REG_WSIZE] = i;
2801 else
2802 PARSE_ERROR1;
2803 break;
2804 case 'V':
2805 /* &V - Show registers */
2806 p[0]++;
2807 isdn_tty_at_cout("\r\n", info);
2808 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2809 sprintf(rb, "S%02d=%03d%s", i,
2810 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2811 isdn_tty_at_cout(rb, info);
2812 }
2813 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2814 strlen(m->msn) ? m->msn : "None");
2815 isdn_tty_at_cout(rb, info);
2816 if (strlen(m->lmsn)) {
2817 isdn_tty_at_cout("\r\nListen: ", info);
2818 isdn_tty_at_cout(m->lmsn, info);
2819 isdn_tty_at_cout("\r\n", info);
2820 }
2821 break;
2822 case 'W':
2823 /* &W - Write Profile */
2824 p[0]++;
2825 switch (*p[0]) {
2826 case '0':
1da177e4 2827 p[0]++;
475be4d8 2828 modem_write_profile(m);
1da177e4 2829 break;
475be4d8
JP		 2830 default:
2831 PARSE_ERROR1;
2832 }
2833 break;
2834 case 'X':
2835 /* &X - Switch to BTX-Mode and T.70 */
2836 p[0]++;
2837 switch (isdn_getnum(p)) {
2838 case 0:
2839 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2840 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2841 break;
2842 case 1:
2843 m->mdmreg[REG_T70] |= BIT_T70;
2844 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2845 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2846 info->xmit_size = 112;
2847 m->mdmreg[REG_SI1] = 4;
2848 m->mdmreg[REG_SI2] = 0;
2849 break;
2850 case 2:
2851 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2852 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2853 info->xmit_size = 112;
2854 m->mdmreg[REG_SI1] = 4;
2855 m->mdmreg[REG_SI2] = 0;
1da177e4
LT		 2856 break;
2857 default:
2858 PARSE_ERROR1;
475be4d8
JP		 2859 }
2860 break;
2861 default:
2862 PARSE_ERROR1;
1da177e4
LT		 2863 }
2864 return 0;
2865}
2866
2867static int
475be4d8 2868isdn_tty_check_ats(int mreg, int mval, modem_info *info, atemu *m)
1da177e4
LT		 2869{
2870 /* Some plausibility checks */
2871 switch (mreg) {
475be4d8
JP		 2872 case REG_L2PROT:
2873 if (mval > ISDN_PROTO_L2_MAX)
2874 return 1;
2875 break;
2876 case REG_PSIZE:
2877 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2878 return 1;
1da177e4 2879#ifdef CONFIG_ISDN_AUDIO
475be4d8 2880 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
1da177e4 2881 return 1;
475be4d8
JP		 2882#endif
2883 info->xmit_size = mval * 16;
2884 switch (m->mdmreg[REG_L2PROT]) {
2885 case ISDN_PROTO_L2_V11096:
2886 case ISDN_PROTO_L2_V11019:
2887 case ISDN_PROTO_L2_V11038:
2888 info->xmit_size /= 10;
2889 }
2890 break;
2891 case REG_SI1I:
2892 case REG_PLAN:
2893 case REG_SCREEN:
2894 /* readonly registers */
2895 return 1;
1da177e4
LT		 2896 }
2897 return 0;
2898}
2899
2900/*
2901 * Perform ATS command
2902 */
2903static int
475be4d8 2904isdn_tty_cmd_ATS(char **p, modem_info *info)
1da177e4
LT		 2905{
2906 atemu *m = &info->emu;
2907 int bitpos;
2908 int mreg;
2909 int mval;
2910 int bval;
2911
2912 mreg = isdn_getnum(p);
2913 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
2914 PARSE_ERROR1;
2915 switch (*p[0]) {
475be4d8
JP		 2916 case '=':
2917 p[0]++;
2918 mval = isdn_getnum(p);
2919 if (mval < 0 || mval > 255)
2920 PARSE_ERROR1;
2921 if (isdn_tty_check_ats(mreg, mval, info, m))
2922 PARSE_ERROR1;
2923 m->mdmreg[mreg] = mval;
2924 break;
2925 case '.':
2926 /* Set/Clear a single bit */
2927 p[0]++;
2928 bitpos = isdn_getnum(p);
2929 if ((bitpos < 0) || (bitpos > 7))
2930 PARSE_ERROR1;
2931 switch (*p[0]) {
1da177e4
LT		 2932 case '=':
2933 p[0]++;
475be4d8
JP		 2934 bval = isdn_getnum(p);
2935 if (bval < 0 || bval > 1)
1da177e4 2936 PARSE_ERROR1;
475be4d8
JP		 2937 if (bval)
2938 mval = m->mdmreg[mreg] | (1 << bitpos);
2939 else
2940 mval = m->mdmreg[mreg] & ~(1 << bitpos);
1da177e4
LT		 2941 if (isdn_tty_check_ats(mreg, mval, info, m))
2942 PARSE_ERROR1;
2943 m->mdmreg[mreg] = mval;
2944 break;
1da177e4
LT		 2945 case '?':
2946 p[0]++;
475be4d8
JP		 2947 isdn_tty_at_cout("\r\n", info);
2948 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
2949 info);
1da177e4
LT		 2950 break;
2951 default:
2952 PARSE_ERROR1;
475be4d8
JP		 2953 }
2954 break;
2955 case '?':
2956 p[0]++;
2957 isdn_tty_show_profile(mreg, info);
2958 break;
2959 default:
2960 PARSE_ERROR1;
2961 break;
1da177e4
LT		 2962 }
2963 return 0;
2964}
2965
2966/*
2967 * Perform ATA command
2968 */
2969static void
475be4d8 2970isdn_tty_cmd_ATA(modem_info *info)
1da177e4
LT		 2971{
2972 atemu *m = &info->emu;
2973 isdn_ctrl cmd;
2974 int l2;
2975
2976 if (info->msr & UART_MSR_RI) {
2977 /* Accept incoming call */
2978 info->last_dir = 0;
2979 strcpy(info->last_num, dev->num[info->drv_index]);
2980 m->mdmreg[REG_RINGCNT] = 0;
2981 info->msr &= ~UART_MSR_RI;
2982 l2 = m->mdmreg[REG_L2PROT];
2983#ifdef CONFIG_ISDN_AUDIO
2984 /* If more than one bit set in reg18, autoselect Layer2 */
2985 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
2986 if (m->mdmreg[REG_SI1I] == 1) {
2987 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
2988 l2 = ISDN_PROTO_L2_TRANS;
2989 } else
2990 l2 = ISDN_PROTO_L2_X75I;
2991 }
2992#endif
2993 cmd.driver = info->isdn_driver;
2994 cmd.command = ISDN_CMD_SETL2;
2995 cmd.arg = info->isdn_channel + (l2 << 8);
2996 info->last_l2 = l2;
2997 isdn_command(&cmd);
2998 cmd.driver = info->isdn_driver;
2999 cmd.command = ISDN_CMD_SETL3;
3000 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3001#ifdef CONFIG_ISDN_TTY_FAX
3002 if (l2 == ISDN_PROTO_L2_FAX) {
3003 cmd.parm.fax = info->fax;
3004 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3005 }
3006#endif
3007 isdn_command(&cmd);
3008 cmd.driver = info->isdn_driver;
3009 cmd.arg = info->isdn_channel;
3010 cmd.command = ISDN_CMD_ACCEPTD;
3011 info->dialing = 16;
3012 info->emu.carrierwait = 0;
3013 isdn_command(&cmd);
3014 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3015 } else
3016 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3017}
3018
3019#ifdef CONFIG_ISDN_AUDIO
3020/*
3021 * Parse AT+F.. commands
3022 */
3023static int
475be4d8 3024isdn_tty_cmd_PLUSF(char **p, modem_info *info)
1da177e4
LT		 3025{
3026 atemu *m = &info->emu;
3027 char rs[20];
3028
3029 if (!strncmp(p[0], "CLASS", 5)) {
3030 p[0] += 5;
3031 switch (*p[0]) {
475be4d8
JP		 3032 case '?':
3033 p[0]++;
3034 sprintf(rs, "\r\n%d",
3035 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
1da177e4 3036#ifdef CONFIG_ISDN_TTY_FAX
475be4d8
JP		 3037 if (TTY_IS_FCLASS2(info))
3038 sprintf(rs, "\r\n2");
3039 else if (TTY_IS_FCLASS1(info))
3040 sprintf(rs, "\r\n1");
1da177e4 3041#endif
475be4d8
JP		 3042 isdn_tty_at_cout(rs, info);
3043 break;
3044 case '=':
3045 p[0]++;
3046 switch (*p[0]) {
3047 case '0':
1da177e4 3048 p[0]++;
475be4d8
JP		 3049 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3050 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3051 m->mdmreg[REG_SI1] = 4;
3052 info->xmit_size =
3053 m->mdmreg[REG_PSIZE] * 16;
3054 break;
1da177e4 3055#ifdef CONFIG_ISDN_TTY_FAX
475be4d8
JP		 3056 case '1':
3057 p[0]++;
3058 if (!(dev->global_features &
3059 ISDN_FEATURE_L3_FCLASS1))
3060 PARSE_ERROR1;
3061 m->mdmreg[REG_SI1] = 1;
3062 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3063 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3064 info->xmit_size =
3065 m->mdmreg[REG_PSIZE] * 16;
3066 break;
3067 case '2':
3068 p[0]++;
3069 if (!(dev->global_features &
3070 ISDN_FEATURE_L3_FCLASS2))
3071 PARSE_ERROR1;
3072 m->mdmreg[REG_SI1] = 1;
3073 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3074 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3075 info->xmit_size =
3076 m->mdmreg[REG_PSIZE] * 16;
3077 break;
1da177e4 3078#endif
475be4d8
JP		 3079 case '8':
3080 p[0]++;
3081 /* L2 will change on dialout with si=1 */
3082 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3083 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3084 m->mdmreg[REG_SI1] = 5;
3085 info->xmit_size = VBUF;
3086 break;
3087 case '?':
3088 p[0]++;
3089 strcpy(rs, "\r\n0,");
1da177e4 3090#ifdef CONFIG_ISDN_TTY_FAX
475be4d8
JP		 3091 if (dev->global_features &
3092 ISDN_FEATURE_L3_FCLASS1)
3093 strcat(rs, "1,");
3094 if (dev->global_features &
3095 ISDN_FEATURE_L3_FCLASS2)
3096 strcat(rs, "2,");
3097#endif
3098 strcat(rs, "8");
3099 isdn_tty_at_cout(rs, info);
1da177e4
LT		 3100 break;
3101 default:
3102 PARSE_ERROR1;
475be4d8
JP		 3103 }
3104 break;
3105 default:
3106 PARSE_ERROR1;
1da177e4
LT		 3107 }
3108 return 0;
3109 }
3110#ifdef CONFIG_ISDN_TTY_FAX
3111 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3112#else
3113 PARSE_ERROR1;
3114#endif
3115}
3116
3117/*
3118 * Parse AT+V.. commands
3119 */
3120static int
475be4d8 3121isdn_tty_cmd_PLUSV(char **p, modem_info *info)
1da177e4
LT		 3122{
3123 atemu *m = &info->emu;
3124 isdn_ctrl cmd;
3125 static char *vcmd[] =
475be4d8 3126 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
1da177e4
LT		 3127 int i;
3128 int par1;
3129 int par2;
3130 char rs[20];
3131
3132 i = 0;
3133 while (vcmd[i]) {
3134 if (!strncmp(vcmd[i], p[0], 2)) {
3135 p[0] += 2;
3136 break;
3137 }
3138 i++;
3139 }
3140 switch (i) {
475be4d8
JP		 3141 case 0:
3142 /* AT+VNH - Auto hangup feature */
3143 switch (*p[0]) {
3144 case '?':
3145 p[0]++;
3146 isdn_tty_at_cout("\r\n1", info);
3147 break;
3148 case '=':
3149 p[0]++;
1da177e4 3150 switch (*p[0]) {
475be4d8
JP		 3151 case '1':
3152 p[0]++;
3153 break;
3154 case '?':
3155 p[0]++;
3156 isdn_tty_at_cout("\r\n1", info);
3157 break;
3158 default:
3159 PARSE_ERROR1;
1da177e4
LT		 3160 }
3161 break;
475be4d8
JP		 3162 default:
3163 PARSE_ERROR1;
3164 }
3165 break;
3166 case 1:
3167 /* AT+VIP - Reset all voice parameters */
3168 isdn_tty_modem_reset_vpar(m);
3169 break;
3170 case 2:
3171 /* AT+VLS - Select device, accept incoming call */
3172 switch (*p[0]) {
3173 case '?':
3174 p[0]++;
3175 sprintf(rs, "\r\n%d", m->vpar[0]);
3176 isdn_tty_at_cout(rs, info);
1da177e4 3177 break;
475be4d8
JP		 3178 case '=':
3179 p[0]++;
1da177e4 3180 switch (*p[0]) {
475be4d8
JP		 3181 case '0':
3182 p[0]++;
3183 m->vpar[0] = 0;
3184 break;
3185 case '2':
3186 p[0]++;
3187 m->vpar[0] = 2;
3188 break;
3189 case '?':
3190 p[0]++;
3191 isdn_tty_at_cout("\r\n0,2", info);
3192 break;
3193 default:
1da177e4
LT		 3194 PARSE_ERROR1;
3195 }
475be4d8
JP		 3196 break;
3197 default:
3198 PARSE_ERROR1;
3199 }
3200 break;
3201 case 3:
3202 /* AT+VRX - Start recording */
3203 if (!m->vpar[0])
3204 PARSE_ERROR1;
3205 if (info->online != 1) {
3206 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3207 return 1;
3208 }
3209 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3210 if (!info->dtmf_state) {
3211 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3212 PARSE_ERROR1;
3213 }
3214 info->silence_state = isdn_audio_silence_init(info->silence_state);
3215 if (!info->silence_state) {
3216 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3217 PARSE_ERROR1;
3218 }
3219 if (m->vpar[3] < 5) {
3220 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3221 if (!info->adpcmr) {
3222 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
1da177e4
LT		 3223 PARSE_ERROR1;
3224 }
475be4d8 3225 }
1da177e4 3226#ifdef ISDN_DEBUG_AT
475be4d8 3227 printk(KERN_DEBUG "AT: +VRX\n");
1da177e4 3228#endif
475be4d8
JP		 3229 info->vonline |= 1;
3230 isdn_tty_modem_result(RESULT_CONNECT, info);
3231 return 0;
3232 break;
3233 case 4:
3234 /* AT+VSD - Silence detection */
3235 switch (*p[0]) {
3236 case '?':
3237 p[0]++;
3238 sprintf(rs, "\r\n<%d>,<%d>",
3239 m->vpar[1],
3240 m->vpar[2]);
3241 isdn_tty_at_cout(rs, info);
1da177e4 3242 break;
475be4d8
JP		 3243 case '=':
3244 p[0]++;
3245 if ((*p[0] >= '0') && (*p[0] <= '9')) {
3246 par1 = isdn_getnum(p);
3247 if ((par1 < 0) || (par1 > 31))
1da177e4 3248 PARSE_ERROR1;
475be4d8 3249 if (*p[0] != ',')
1da177e4 3250 PARSE_ERROR1;
475be4d8
JP		 3251 p[0]++;
3252 par2 = isdn_getnum(p);
3253 if ((par2 < 0) || (par2 > 255))
3254 PARSE_ERROR1;
3255 m->vpar[1] = par1;
3256 m->vpar[2] = par2;
3257 break;
3258 } else
3259 if (*p[0] == '?') {
1da177e4 3260 p[0]++;
475be4d8
JP		 3261 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3262 info);
1da177e4 3263 break;
475be4d8 3264 } else
1da177e4 3265 PARSE_ERROR1;
1da177e4 3266 break;
475be4d8
JP		 3267 default:
3268 PARSE_ERROR1;
3269 }
3270 break;
3271 case 5:
3272 /* AT+VSM - Select compression */
3273 switch (*p[0]) {
3274 case '?':
3275 p[0]++;
3276 sprintf(rs, "\r\n<%d>,<%d><8000>",
3277 m->vpar[3],
3278 m->vpar[1]);
3279 isdn_tty_at_cout(rs, info);
3280 break;
3281 case '=':
3282 p[0]++;
3283 switch (*p[0]) {
3284 case '2':
3285 case '3':
3286 case '4':
3287 case '5':
3288 case '6':
3289 par1 = isdn_getnum(p);
3290 if ((par1 < 2) || (par1 > 6))
3291 PARSE_ERROR1;
3292 m->vpar[3] = par1;
3293 break;
3294 case '?':
3295 p[0]++;
3296 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3297 info);
3298 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3299 info);
3300 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3301 info);
3302 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3303 info);
3304 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3305 info);
3306 break;
3307 default:
1da177e4 3308 PARSE_ERROR1;
1da177e4 3309 }
475be4d8
JP		 3310 break;
3311 default:
3312 PARSE_ERROR1;
3313 }
3314 break;
3315 case 6:
3316 /* AT+VTX - Start sending */
3317 if (!m->vpar[0])
3318 PARSE_ERROR1;
3319 if (info->online != 1) {
3320 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3321 return 1;
3322 }
3323 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3324 if (!info->dtmf_state) {
3325 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3326 PARSE_ERROR1;
3327 }
3328 if (m->vpar[3] < 5) {
3329 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3330 if (!info->adpcms) {
3331 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
1da177e4
LT		 3332 PARSE_ERROR1;
3333 }
475be4d8 3334 }
1da177e4 3335#ifdef ISDN_DEBUG_AT
475be4d8 3336 printk(KERN_DEBUG "AT: +VTX\n");
1da177e4 3337#endif
475be4d8
JP		 3338 m->lastDLE = 0;
3339 info->vonline |= 2;
3340 isdn_tty_modem_result(RESULT_CONNECT, info);
3341 return 0;
3342 break;
3343 case 7:
3344 /* AT+VDD - DTMF detection */
3345 switch (*p[0]) {
3346 case '?':
3347 p[0]++;
3348 sprintf(rs, "\r\n<%d>,<%d>",
3349 m->vpar[4],
3350 m->vpar[5]);
3351 isdn_tty_at_cout(rs, info);
1da177e4 3352 break;
475be4d8
JP		 3353 case '=':
3354 p[0]++;
3355 if ((*p[0] >= '0') && (*p[0] <= '9')) {
3356 if (info->online != 1)
3357 PARSE_ERROR1;
3358 par1 = isdn_getnum(p);
3359 if ((par1 < 0) || (par1 > 15))
3360 PARSE_ERROR1;
3361 if (*p[0] != ',')
1da177e4 3362 PARSE_ERROR1;
475be4d8
JP		 3363 p[0]++;
3364 par2 = isdn_getnum(p);
3365 if ((par2 < 0) || (par2 > 255))
3366 PARSE_ERROR1;
3367 m->vpar[4] = par1;
3368 m->vpar[5] = par2;
3369 cmd.driver = info->isdn_driver;
3370 cmd.command = ISDN_CMD_AUDIO;
3371 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3372 cmd.parm.num[0] = par1;
3373 cmd.parm.num[1] = par2;
3374 isdn_command(&cmd);
3375 break;
3376 } else
3377 if (*p[0] == '?') {
3378 p[0]++;
3379 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3380 info);
1da177e4 3381 break;
475be4d8 3382 } else
1da177e4 3383 PARSE_ERROR1;
1da177e4
LT		 3384 break;
3385 default:
3386 PARSE_ERROR1;
475be4d8
JP		 3387 }
3388 break;
3389 default:
3390 PARSE_ERROR1;
1da177e4
LT		 3391 }
3392 return 0;
3393}
3394#endif /* CONFIG_ISDN_AUDIO */
3395
3396/*
3397 * Parse and perform an AT-command-line.
3398 */
3399static void
475be4d8 3400isdn_tty_parse_at(modem_info *info)
1da177e4
LT		 3401{
3402 atemu *m = &info->emu;
3403 char *p;
f417f5e4 3404 char ds[ISDN_MSNLEN];
1da177e4
LT		 3405
3406#ifdef ISDN_DEBUG_AT
3407 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3408#endif
3409 for (p = &m->mdmcmd[2]; *p;) {
3410 switch (*p) {
475be4d8
JP		 3411 case ' ':
3412 p++;
3413 break;
3414 case 'A':
3415 /* A - Accept incoming call */
3416 p++;
3417 isdn_tty_cmd_ATA(info);
3418 return;
475be4d8
JP		 3419 case 'D':
3420 /* D - Dial */
3421 if (info->msr & UART_MSR_DCD)
3422 PARSE_ERROR;
3423 if (info->msr & UART_MSR_RI) {
3424 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3425 return;
3426 }
3427 isdn_tty_getdial(++p, ds, sizeof ds);
3428 p += strlen(p);
3429 if (!strlen(m->msn))
3430 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3431 else if (strlen(ds))
3432 isdn_tty_dial(ds, info, m);
3433 else
3434 PARSE_ERROR;
3435 return;
3436 case 'E':
3437 /* E - Turn Echo on/off */
3438 p++;
3439 switch (isdn_getnum(&p)) {
3440 case 0:
3441 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
1da177e4 3442 break;
475be4d8
JP		 3443 case 1:
3444 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3445 break;
3446 default:
3447 PARSE_ERROR;
3448 }
3449 break;
3450 case 'H':
3451 /* H - On/Off-hook */
3452 p++;
3453 switch (*p) {
3454 case '0':
1da177e4 3455 p++;
475be4d8 3456 isdn_tty_on_hook(info);
1da177e4 3457 break;
475be4d8 3458 case '1':
1da177e4 3459 p++;
475be4d8 3460 isdn_tty_off_hook();
1da177e4 3461 break;
475be4d8
JP		 3462 default:
3463 isdn_tty_on_hook(info);
3464 break;
3465 }
3466 break;
3467 case 'I':
3468 /* I - Information */
3469 p++;
3470 isdn_tty_at_cout("\r\nLinux ISDN", info);
3471 switch (*p) {
3472 case '0':
3473 case '1':
1da177e4 3474 p++;
1da177e4 3475 break;
475be4d8 3476 case '2':
1da177e4 3477 p++;
475be4d8 3478 isdn_tty_report(info);
1da177e4 3479 break;
475be4d8 3480 case '3':
1da177e4 3481 p++;
475be4d8
JP		 3482 snprintf(ds, sizeof(ds), "\r\n%d", info->emu.charge);
3483 isdn_tty_at_cout(ds, info);
1da177e4 3484 break;
475be4d8
JP		 3485 default:;
3486 }
3487 break;
3488#ifdef DUMMY_HAYES_AT
3489 case 'L':
3490 case 'M':
3491 /* only for be compilant with common scripts */
3492 /* no function */
3493 p++;
3494 isdn_getnum(&p);
3495 break;
1da177e4 3496#endif
475be4d8
JP		 3497 case 'O':
3498 /* O - Go online */
3499 p++;
3500 if (info->msr & UART_MSR_DCD)
3501 /* if B-Channel is up */
3502 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT : RESULT_CONNECT64000, info);
3503 else
3504 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3505 return;
3506 case 'Q':
3507 /* Q - Turn Emulator messages on/off */
3508 p++;
3509 switch (isdn_getnum(&p)) {
3510 case 0:
3511 m->mdmreg[REG_RESP] |= BIT_RESP;
3512 break;
3513 case 1:
3514 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3515 break;
3516 default:
3517 PARSE_ERROR;
3518 }
3519 break;
3520 case 'S':
3521 /* S - Set/Get Register */
3522 p++;
3523 if (isdn_tty_cmd_ATS(&p, info))
1da177e4 3524 return;
475be4d8
JP		 3525 break;
3526 case 'V':
3527 /* V - Numeric or ASCII Emulator-messages */
3528 p++;
3529 switch (isdn_getnum(&p)) {
3530 case 0:
3531 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3532 break;
3533 case 1:
3534 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
1da177e4 3535 break;
475be4d8
JP		 3536 default:
3537 PARSE_ERROR;
3538 }
3539 break;
3540 case 'Z':
3541 /* Z - Load Registers from Profile */
3542 p++;
3543 if (info->msr & UART_MSR_DCD) {
3544 info->online = 0;
3545 isdn_tty_on_hook(info);
3546 }
3547 isdn_tty_modem_reset_regs(info, 1);
3548 break;
3549 case '+':
3550 p++;
3551 switch (*p) {
3552#ifdef CONFIG_ISDN_AUDIO
3553 case 'F':
1da177e4 3554 p++;
475be4d8 3555 if (isdn_tty_cmd_PLUSF(&p, info))
1da177e4
LT		 3556 return;
3557 break;
3558 case 'V':
475be4d8
JP		 3559 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3560 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3561 PARSE_ERROR;
1da177e4 3562 p++;
475be4d8
JP		 3563 if (isdn_tty_cmd_PLUSV(&p, info))
3564 return;
1da177e4 3565 break;
475be4d8
JP		 3566#endif /* CONFIG_ISDN_AUDIO */
3567 case 'S': /* SUSPEND */
1da177e4 3568 p++;
475be4d8
JP		 3569 isdn_tty_get_msnstr(ds, &p);
3570 isdn_tty_suspend(ds, info, m);
1da177e4 3571 break;
475be4d8 3572 case 'R': /* RESUME */
1da177e4 3573 p++;
475be4d8
JP		 3574 isdn_tty_get_msnstr(ds, &p);
3575 isdn_tty_resume(ds, info, m);
1da177e4 3576 break;
475be4d8 3577 case 'M': /* MESSAGE */
1da177e4 3578 p++;
475be4d8 3579 isdn_tty_send_msg(info, m, p);
1da177e4
LT		 3580 break;
3581 default:
3582 PARSE_ERROR;
475be4d8
JP		 3583 }
3584 break;
3585 case '&':
3586 p++;
3587 if (isdn_tty_cmd_ATand(&p, info))
3588 return;
3589 break;
3590 default:
3591 PARSE_ERROR;
1da177e4
LT		 3592 }
3593 }
3594#ifdef CONFIG_ISDN_AUDIO
3595 if (!info->vonline)
3596#endif
3597 isdn_tty_modem_result(RESULT_OK, info);
3598}
3599
3600/* Need own toupper() because standard-toupper is not available
3601 * within modules.
3602 */
475be4d8 3603#define my_toupper(c) (((c >= 'a') && (c <= 'z')) ? (c & 0xdf) : c)
1da177e4
LT		 3604
3605/*
3606 * Perform line-editing of AT-commands
3607 *
3608 * Parameters:
3609 * p inputbuffer
3610 * count length of buffer
3611 * channel index to line (minor-device)
3612 */
3613static int
475be4d8 3614isdn_tty_edit_at(const char *p, int count, modem_info *info)
1da177e4
LT		 3615{
3616 atemu *m = &info->emu;
3617 int total = 0;
3618 u_char c;
3619 char eb[2];
3620 int cnt;
3621
3622 for (cnt = count; cnt > 0; p++, cnt--) {
3623 c = *p;
3624 total++;
3625 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3626 /* Separator (CR or LF) */
3627 m->mdmcmd[m->mdmcmdl] = 0;
3628 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3629 eb[0] = c;
3630 eb[1] = 0;
3631 isdn_tty_at_cout(eb, info);
3632 }
3633 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3634 isdn_tty_parse_at(info);
3635 m->mdmcmdl = 0;
3636 continue;
3637 }
3638 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3639 /* Backspace-Function */
3640 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3641 if (m->mdmcmdl)
3642 m->mdmcmdl--;
3643 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3644 isdn_tty_at_cout("\b", info);
3645 }
3646 continue;
3647 }
3648 if (cmdchar(c)) {
3649 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3650 eb[0] = c;
3651 eb[1] = 0;
3652 isdn_tty_at_cout(eb, info);
3653 }
3654 if (m->mdmcmdl < 255) {
3655 c = my_toupper(c);
3656 switch (m->mdmcmdl) {
475be4d8
JP		 3657 case 1:
3658 if (c == 'T') {
3659 m->mdmcmd[m->mdmcmdl] = c;
3660 m->mdmcmd[++m->mdmcmdl] = 0;
1da177e4 3661 break;
475be4d8
JP		 3662 } else
3663 m->mdmcmdl = 0;
3664 /* Fall through, check for 'A' */
3665 case 0:
3666 if (c == 'A') {
1da177e4
LT		 3667 m->mdmcmd[m->mdmcmdl] = c;
3668 m->mdmcmd[++m->mdmcmdl] = 0;
475be4d8
JP		 3669 }
3670 break;
3671 default:
3672 m->mdmcmd[m->mdmcmdl] = c;
3673 m->mdmcmd[++m->mdmcmdl] = 0;
1da177e4
LT		 3674 }
3675 }
3676 }
3677 }
3678 return total;
3679}
3680
3681/*
3682 * Switch all modem-channels who are online and got a valid
3683 * escape-sequence 1.5 seconds ago, to command-mode.
3684 * This function is called every second via timer-interrupt from within
3685 * timer-dispatcher isdn_timer_function()
3686 */
3687void
3688isdn_tty_modem_escape(void)
3689{
3690 int ton = 0;
3691 int i;
3692 int midx;
3693
3694 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
37630f40
JS		 3695 if (USG_MODEM(dev->usage[i]) && (midx = dev->m_idx[i]) >= 0) {
3696 modem_info *info = &dev->mdm.info[midx];
3697 if (info->online) {
3698 ton = 1;
3699 if ((info->emu.pluscount == 3) &&
3700 time_after(jiffies,
3701 info->emu.lastplus + PLUSWAIT2)) {
3702 info->emu.pluscount = 0;
3703 info->online = 0;
3704 isdn_tty_modem_result(RESULT_OK, info);
1da177e4
LT		 3705 }
3706 }
37630f40 3707 }
1da177e4
LT		 3708 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3709}
3710
3711/*
3712 * Put a RING-message to all modem-channels who have the RI-bit set.
3713 * This function is called every second via timer-interrupt from within
3714 * timer-dispatcher isdn_timer_function()
3715 */
3716void
3717isdn_tty_modem_ring(void)
3718{
3719 int ton = 0;
3720 int i;
3721
3722 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3723 modem_info *info = &dev->mdm.info[i];
3724 if (info->msr & UART_MSR_RI) {
3725 ton = 1;
3726 isdn_tty_modem_result(RESULT_RING, info);
3727 }
3728 }
3729 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3730}
3731
3732/*
3733 * For all online tty's, try sending data to
3734 * the lower levels.
3735 */
3736void
3737isdn_tty_modem_xmit(void)
3738{
3739 int ton = 1;
3740 int i;
3741
3742 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3743 modem_info *info = &dev->mdm.info[i];
3744 if (info->online) {
3745 ton = 1;
3746 isdn_tty_senddown(info);
3747 isdn_tty_tint(info);
3748 }
3749 }
3750 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3751}
3752
3753/*
3754 * Check all channels if we have a 'no carrier' timeout.
3755 * Timeout value is set by Register S7.
3756 */
3757void
3758isdn_tty_carrier_timeout(void)
3759{
3760 int ton = 0;
3761 int i;
3762
3763 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3764 modem_info *info = &dev->mdm.info[i];
37630f40
JS		 3765 if (!info->dialing)
3766 continue;
3767 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3768 info->dialing = 0;
3769 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3770 isdn_tty_modem_hup(info, 1);
3771 } else
3772 ton = 1;
1da177e4
LT		 3773 }
3774 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3775}
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