1 /* $Id: isdn_tty.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
2 *
3 * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
4 *
5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
7 *
8 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 */
12 #undef ISDN_TTY_STAT_DEBUG
13
14 #include <linux/isdn.h>
15 #include <linux/slab.h>
16 #include <linux/delay.h>
17 #include <linux/mutex.h>
18 #include "isdn_common.h"
19 #include "isdn_tty.h"
20 #ifdef CONFIG_ISDN_AUDIO
21 #include "isdn_audio.h"
22 #define VBUF 0x3e0
23 #define VBUFX (VBUF/16)
24 #endif
25
26 #define FIX_FILE_TRANSFER
27 #define DUMMY_HAYES_AT
28
29 /* Prototypes */
30
31 static DEFINE_MUTEX(modem_info_mutex);
32 static int isdn_tty_edit_at(const char *, int, modem_info *);
33 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
34 static void isdn_tty_modem_reset_regs(modem_info *, int);
35 static void isdn_tty_cmd_ATA(modem_info *);
36 static void isdn_tty_flush_buffer(struct tty_struct *);
37 static void isdn_tty_modem_result(int, modem_info *);
38 #ifdef CONFIG_ISDN_AUDIO
39 static int isdn_tty_countDLE(unsigned char *, int);
40 #endif
41
42 /* Leave this unchanged unless you know what you do! */
43 #define MODEM_PARANOIA_CHECK
44 #define MODEM_DO_RESTART
45
46 static int bit2si[8] =
47 {1, 5, 7, 7, 7, 7, 7, 7};
48 static int si2bit[8] =
49 {4, 1, 4, 4, 4, 4, 4, 4};
50
51 char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
52
53
54 /* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
55 * to stuff incoming data directly into a tty's flip-buffer. This
56 * is done to speed up tty-receiving if the receive-queue is empty.
57 * This routine MUST be called with interrupts off.
58 * Return:
59 * 1 = Success
60 * 0 = Failure, data has to be buffered and later processed by
61 * isdn_tty_readmodem().
62 */
63 static int
isdn_tty_try_read(modem_info * info,struct sk_buff * skb)64 isdn_tty_try_read(modem_info * info, struct sk_buff *skb)
65 {
66 int c;
67 int len;
68 struct tty_struct *tty;
69 char last;
70
71 if (info->online) {
72 if ((tty = info->tty)) {
73 if (info->mcr & UART_MCR_RTS) {
74 len = skb->len
75 #ifdef CONFIG_ISDN_AUDIO
76 + ISDN_AUDIO_SKB_DLECOUNT(skb)
77 #endif
78 ;
79
80 c = tty_buffer_request_room(tty, len);
81 if (c >= len) {
82 #ifdef CONFIG_ISDN_AUDIO
83 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
84 int l = skb->len;
85 unsigned char *dp = skb->data;
86 while (--l) {
87 if (*dp == DLE)
88 tty_insert_flip_char(tty, DLE, 0);
89 tty_insert_flip_char(tty, *dp++, 0);
90 }
91 if (*dp == DLE)
92 tty_insert_flip_char(tty, DLE, 0);
93 last = *dp;
94 } else {
95 #endif
96 if(len > 1)
97 tty_insert_flip_string(tty, skb->data, len - 1);
98 last = skb->data[len - 1];
99 #ifdef CONFIG_ISDN_AUDIO
100 }
101 #endif
102 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
103 tty_insert_flip_char(tty, last, 0xFF);
104 else
105 tty_insert_flip_char(tty, last, TTY_NORMAL);
106 tty_flip_buffer_push(tty);
107 kfree_skb(skb);
108 return 1;
109 }
110 }
111 }
112 }
113 return 0;
114 }
115
116 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
117 * It tries getting received data from the receive queue an stuff it into
118 * the tty's flip-buffer.
119 */
120 void
isdn_tty_readmodem(void)121 isdn_tty_readmodem(void)
122 {
123 int resched = 0;
124 int midx;
125 int i;
126 int r;
127 struct tty_struct *tty;
128 modem_info *info;
129
130 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
131 if ((midx = dev->m_idx[i]) >= 0) {
132 info = &dev->mdm.info[midx];
133 if (info->online) {
134 r = 0;
135 #ifdef CONFIG_ISDN_AUDIO
136 isdn_audio_eval_dtmf(info);
137 if ((info->vonline & 1) && (info->emu.vpar[1]))
138 isdn_audio_eval_silence(info);
139 #endif
140 if ((tty = info->tty)) {
141 if (info->mcr & UART_MCR_RTS) {
142 /* CISCO AsyncPPP Hack */
143 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
144 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
145 else
146 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
147 if (r)
148 tty_flip_buffer_push(tty);
149 } else
150 r = 1;
151 } else
152 r = 1;
153 if (r) {
154 info->rcvsched = 0;
155 resched = 1;
156 } else
157 info->rcvsched = 1;
158 }
159 }
160 }
161 if (!resched)
162 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
163 }
164
165 int
isdn_tty_rcv_skb(int i,int di,int channel,struct sk_buff * skb)166 isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
167 {
168 ulong flags;
169 int midx;
170 #ifdef CONFIG_ISDN_AUDIO
171 int ifmt;
172 #endif
173 modem_info *info;
174
175 if ((midx = dev->m_idx[i]) < 0) {
176 /* if midx is invalid, packet is not for tty */
177 return 0;
178 }
179 info = &dev->mdm.info[midx];
180 #ifdef CONFIG_ISDN_AUDIO
181 ifmt = 1;
182
183 if ((info->vonline) && (!info->emu.vpar[4]))
184 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
185 if ((info->vonline & 1) && (info->emu.vpar[1]))
186 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
187 #endif
188 if ((info->online < 2)
189 #ifdef CONFIG_ISDN_AUDIO
190 && (!(info->vonline & 1))
191 #endif
192 ) {
193 /* If Modem not listening, drop data */
194 kfree_skb(skb);
195 return 1;
196 }
197 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
198 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
199 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
200 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
201 skb_pull(skb, 4);
202 else
203 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
204 skb_pull(skb, 2);
205 } else
206 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
207 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
208 skb_pull(skb, 4);
209 }
210 #ifdef CONFIG_ISDN_AUDIO
211 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
212 ISDN_AUDIO_SKB_LOCK(skb) = 0;
213 if (info->vonline & 1) {
214 /* voice conversion/compression */
215 switch (info->emu.vpar[3]) {
216 case 2:
217 case 3:
218 case 4:
219 /* adpcm
220 * Since compressed data takes less
221 * space, we can overwrite the buffer.
222 */
223 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
224 ifmt,
225 skb->data,
226 skb->data,
227 skb->len));
228 break;
229 case 5:
230 /* a-law */
231 if (!ifmt)
232 isdn_audio_ulaw2alaw(skb->data, skb->len);
233 break;
234 case 6:
235 /* u-law */
236 if (ifmt)
237 isdn_audio_alaw2ulaw(skb->data, skb->len);
238 break;
239 }
240 ISDN_AUDIO_SKB_DLECOUNT(skb) =
241 isdn_tty_countDLE(skb->data, skb->len);
242 }
243 #ifdef CONFIG_ISDN_TTY_FAX
244 else {
245 if (info->faxonline & 2) {
246 isdn_tty_fax_bitorder(info, skb);
247 ISDN_AUDIO_SKB_DLECOUNT(skb) =
248 isdn_tty_countDLE(skb->data, skb->len);
249 }
250 }
251 #endif
252 #endif
253 /* Try to deliver directly via tty-buf if queue is empty */
254 spin_lock_irqsave(&info->readlock, flags);
255 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
256 if (isdn_tty_try_read(info, skb)) {
257 spin_unlock_irqrestore(&info->readlock, flags);
258 return 1;
259 }
260 /* Direct deliver failed or queue wasn't empty.
261 * Queue up for later dequeueing via timer-irq.
262 */
263 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
264 dev->drv[di]->rcvcount[channel] +=
265 (skb->len
266 #ifdef CONFIG_ISDN_AUDIO
267 + ISDN_AUDIO_SKB_DLECOUNT(skb)
268 #endif
269 );
270 spin_unlock_irqrestore(&info->readlock, flags);
271 /* Schedule dequeuing */
272 if ((dev->modempoll) && (info->rcvsched))
273 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
274 return 1;
275 }
276
277 static void
isdn_tty_cleanup_xmit(modem_info * info)278 isdn_tty_cleanup_xmit(modem_info * info)
279 {
280 skb_queue_purge(&info->xmit_queue);
281 #ifdef CONFIG_ISDN_AUDIO
282 skb_queue_purge(&info->dtmf_queue);
283 #endif
284 }
285
286 static void
isdn_tty_tint(modem_info * info)287 isdn_tty_tint(modem_info * info)
288 {
289 struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
290 int len, slen;
291
292 if (!skb)
293 return;
294 len = skb->len;
295 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
296 info->isdn_channel, 1, skb)) == len) {
297 struct tty_struct *tty = info->tty;
298 info->send_outstanding++;
299 info->msr &= ~UART_MSR_CTS;
300 info->lsr &= ~UART_LSR_TEMT;
301 tty_wakeup(tty);
302 return;
303 }
304 if (slen < 0) {
305 /* Error: no channel, already shutdown, or wrong parameter */
306 dev_kfree_skb(skb);
307 return;
308 }
309 skb_queue_head(&info->xmit_queue, skb);
310 }
311
312 #ifdef CONFIG_ISDN_AUDIO
313 static int
isdn_tty_countDLE(unsigned char * buf,int len)314 isdn_tty_countDLE(unsigned char *buf, int len)
315 {
316 int count = 0;
317
318 while (len--)
319 if (*buf++ == DLE)
320 count++;
321 return count;
322 }
323
324 /* This routine is called from within isdn_tty_write() to perform
325 * DLE-decoding when sending audio-data.
326 */
327 static int
isdn_tty_handleDLEdown(modem_info * info,atemu * m,int len)328 isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
329 {
330 unsigned char *p = &info->xmit_buf[info->xmit_count];
331 int count = 0;
332
333 while (len > 0) {
334 if (m->lastDLE) {
335 m->lastDLE = 0;
336 switch (*p) {
337 case DLE:
338 /* Escape code */
339 if (len > 1)
340 memmove(p, p + 1, len - 1);
341 p--;
342 count++;
343 break;
344 case ETX:
345 /* End of data */
346 info->vonline |= 4;
347 return count;
348 case DC4:
349 /* Abort RX */
350 info->vonline &= ~1;
351 #ifdef ISDN_DEBUG_MODEM_VOICE
352 printk(KERN_DEBUG
353 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
354 info->line);
355 #endif
356 isdn_tty_at_cout("\020\003", info);
357 if (!info->vonline) {
358 #ifdef ISDN_DEBUG_MODEM_VOICE
359 printk(KERN_DEBUG
360 "DLEdown: send VCON on ttyI%d\n",
361 info->line);
362 #endif
363 isdn_tty_at_cout("\r\nVCON\r\n", info);
364 }
365 /* Fall through */
366 case 'q':
367 case 's':
368 /* Silence */
369 if (len > 1)
370 memmove(p, p + 1, len - 1);
371 p--;
372 break;
373 }
374 } else {
375 if (*p == DLE)
376 m->lastDLE = 1;
377 else
378 count++;
379 }
380 p++;
381 len--;
382 }
383 if (len < 0) {
384 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
385 return 0;
386 }
387 return count;
388 }
389
390 /* This routine is called from within isdn_tty_write() when receiving
391 * audio-data. It interrupts receiving, if an character other than
392 * ^S or ^Q is sent.
393 */
394 static int
isdn_tty_end_vrx(const char * buf,int c)395 isdn_tty_end_vrx(const char *buf, int c)
396 {
397 char ch;
398
399 while (c--) {
400 ch = *buf;
401 if ((ch != 0x11) && (ch != 0x13))
402 return 1;
403 buf++;
404 }
405 return 0;
406 }
407
408 static int voice_cf[7] =
409 {0, 0, 4, 3, 2, 0, 0};
410
411 #endif /* CONFIG_ISDN_AUDIO */
412
413 /* isdn_tty_senddown() is called either directly from within isdn_tty_write()
414 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
415 * outgoing data from the tty's xmit-buffer, handles voice-decompression or
416 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
417 */
418 static void
isdn_tty_senddown(modem_info * info)419 isdn_tty_senddown(modem_info * info)
420 {
421 int buflen;
422 int skb_res;
423 #ifdef CONFIG_ISDN_AUDIO
424 int audio_len;
425 #endif
426 struct sk_buff *skb;
427
428 #ifdef CONFIG_ISDN_AUDIO
429 if (info->vonline & 4) {
430 info->vonline &= ~6;
431 if (!info->vonline) {
432 #ifdef ISDN_DEBUG_MODEM_VOICE
433 printk(KERN_DEBUG
434 "senddown: send VCON on ttyI%d\n",
435 info->line);
436 #endif
437 isdn_tty_at_cout("\r\nVCON\r\n", info);
438 }
439 }
440 #endif
441 if (!(buflen = info->xmit_count))
442 return;
443 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
444 info->msr &= ~UART_MSR_CTS;
445 info->lsr &= ~UART_LSR_TEMT;
446 /* info->xmit_count is modified here and in isdn_tty_write().
447 * So we return here if isdn_tty_write() is in the
448 * critical section.
449 */
450 atomic_inc(&info->xmit_lock);
451 if (!(atomic_dec_and_test(&info->xmit_lock)))
452 return;
453 if (info->isdn_driver < 0) {
454 info->xmit_count = 0;
455 return;
456 }
457 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
458 #ifdef CONFIG_ISDN_AUDIO
459 if (info->vonline & 2)
460 audio_len = buflen * voice_cf[info->emu.vpar[3]];
461 else
462 audio_len = 0;
463 skb = dev_alloc_skb(skb_res + buflen + audio_len);
464 #else
465 skb = dev_alloc_skb(skb_res + buflen);
466 #endif
467 if (!skb) {
468 printk(KERN_WARNING
469 "isdn_tty: Out of memory in ttyI%d senddown\n",
470 info->line);
471 return;
472 }
473 skb_reserve(skb, skb_res);
474 memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
475 info->xmit_count = 0;
476 #ifdef CONFIG_ISDN_AUDIO
477 if (info->vonline & 2) {
478 /* For now, ifmt is fixed to 1 (alaw), since this
479 * is used with ISDN everywhere in the world, except
480 * US, Canada and Japan.
481 * Later, when US-ISDN protocols are implemented,
482 * this setting will depend on the D-channel protocol.
483 */
484 int ifmt = 1;
485
486 /* voice conversion/decompression */
487 switch (info->emu.vpar[3]) {
488 case 2:
489 case 3:
490 case 4:
491 /* adpcm, compatible to ZyXel 1496 modem
492 * with ROM revision 6.01
493 */
494 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
495 ifmt,
496 skb->data,
497 skb_put(skb, audio_len),
498 buflen);
499 skb_pull(skb, buflen);
500 skb_trim(skb, audio_len);
501 break;
502 case 5:
503 /* a-law */
504 if (!ifmt)
505 isdn_audio_alaw2ulaw(skb->data,
506 buflen);
507 break;
508 case 6:
509 /* u-law */
510 if (ifmt)
511 isdn_audio_ulaw2alaw(skb->data,
512 buflen);
513 break;
514 }
515 }
516 #endif /* CONFIG_ISDN_AUDIO */
517 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
518 /* Add T.70 simplified header */
519 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
520 memcpy(skb_push(skb, 2), "\1\0", 2);
521 else
522 memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
523 }
524 skb_queue_tail(&info->xmit_queue, skb);
525 }
526
527 /************************************************************
528 *
529 * Modem-functions
530 *
531 * mostly "stolen" from original Linux-serial.c and friends.
532 *
533 ************************************************************/
534
535 /* The next routine is called once from within timer-interrupt
536 * triggered within isdn_tty_modem_ncarrier(). It calls
537 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
538 * into the tty's buffer.
539 */
540 static void
isdn_tty_modem_do_ncarrier(unsigned long data)541 isdn_tty_modem_do_ncarrier(unsigned long data)
542 {
543 modem_info *info = (modem_info *) data;
544 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
545 }
546
547 /* Next routine is called, whenever the DTR-signal is raised.
548 * It checks the ncarrier-flag, and triggers the above routine
549 * when necessary. The ncarrier-flag is set, whenever DTR goes
550 * low.
551 */
552 static void
isdn_tty_modem_ncarrier(modem_info * info)553 isdn_tty_modem_ncarrier(modem_info * info)
554 {
555 if (info->ncarrier) {
556 info->nc_timer.expires = jiffies + HZ;
557 add_timer(&info->nc_timer);
558 }
559 }
560
561 /*
562 * return the usage calculated by si and layer 2 protocol
563 */
564 static int
isdn_calc_usage(int si,int l2)565 isdn_calc_usage(int si, int l2)
566 {
567 int usg = ISDN_USAGE_MODEM;
568
569 #ifdef CONFIG_ISDN_AUDIO
570 if (si == 1) {
571 switch(l2) {
572 case ISDN_PROTO_L2_MODEM:
573 usg = ISDN_USAGE_MODEM;
574 break;
575 #ifdef CONFIG_ISDN_TTY_FAX
576 case ISDN_PROTO_L2_FAX:
577 usg = ISDN_USAGE_FAX;
578 break;
579 #endif
580 case ISDN_PROTO_L2_TRANS:
581 default:
582 usg = ISDN_USAGE_VOICE;
583 break;
584 }
585 }
586 #endif
587 return(usg);
588 }
589
590 /* isdn_tty_dial() performs dialing of a tty an the necessary
591 * setup of the lower levels before that.
592 */
593 static void
isdn_tty_dial(char * n,modem_info * info,atemu * m)594 isdn_tty_dial(char *n, modem_info * info, atemu * m)
595 {
596 int usg = ISDN_USAGE_MODEM;
597 int si = 7;
598 int l2 = m->mdmreg[REG_L2PROT];
599 u_long flags;
600 isdn_ctrl cmd;
601 int i;
602 int j;
603
604 for (j = 7; j >= 0; j--)
605 if (m->mdmreg[REG_SI1] & (1 << j)) {
606 si = bit2si[j];
607 break;
608 }
609 usg = isdn_calc_usage(si, l2);
610 #ifdef CONFIG_ISDN_AUDIO
611 if ((si == 1) &&
612 (l2 != ISDN_PROTO_L2_MODEM)
613 #ifdef CONFIG_ISDN_TTY_FAX
614 && (l2 != ISDN_PROTO_L2_FAX)
615 #endif
616 ) {
617 l2 = ISDN_PROTO_L2_TRANS;
618 usg = ISDN_USAGE_VOICE;
619 }
620 #endif
621 m->mdmreg[REG_SI1I] = si2bit[si];
622 spin_lock_irqsave(&dev->lock, flags);
623 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
624 if (i < 0) {
625 spin_unlock_irqrestore(&dev->lock, flags);
626 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
627 } else {
628 info->isdn_driver = dev->drvmap[i];
629 info->isdn_channel = dev->chanmap[i];
630 info->drv_index = i;
631 dev->m_idx[i] = info->line;
632 dev->usage[i] |= ISDN_USAGE_OUTGOING;
633 info->last_dir = 1;
634 strcpy(info->last_num, n);
635 isdn_info_update();
636 spin_unlock_irqrestore(&dev->lock, flags);
637 cmd.driver = info->isdn_driver;
638 cmd.arg = info->isdn_channel;
639 cmd.command = ISDN_CMD_CLREAZ;
640 isdn_command(&cmd);
641 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
642 cmd.driver = info->isdn_driver;
643 cmd.command = ISDN_CMD_SETEAZ;
644 isdn_command(&cmd);
645 cmd.driver = info->isdn_driver;
646 cmd.command = ISDN_CMD_SETL2;
647 info->last_l2 = l2;
648 cmd.arg = info->isdn_channel + (l2 << 8);
649 isdn_command(&cmd);
650 cmd.driver = info->isdn_driver;
651 cmd.command = ISDN_CMD_SETL3;
652 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
653 #ifdef CONFIG_ISDN_TTY_FAX
654 if (l2 == ISDN_PROTO_L2_FAX) {
655 cmd.parm.fax = info->fax;
656 info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
657 }
658 #endif
659 isdn_command(&cmd);
660 cmd.driver = info->isdn_driver;
661 cmd.arg = info->isdn_channel;
662 sprintf(cmd.parm.setup.phone, "%s", n);
663 sprintf(cmd.parm.setup.eazmsn, "%s",
664 isdn_map_eaz2msn(m->msn, info->isdn_driver));
665 cmd.parm.setup.si1 = si;
666 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
667 cmd.command = ISDN_CMD_DIAL;
668 info->dialing = 1;
669 info->emu.carrierwait = 0;
670 strcpy(dev->num[i], n);
671 isdn_info_update();
672 isdn_command(&cmd);
673 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
674 }
675 }
676
677 /* isdn_tty_hangup() disassociates a tty from the real
678 * ISDN-line (hangup). The usage-status is cleared
679 * and some cleanup is done also.
680 */
681 void
isdn_tty_modem_hup(modem_info * info,int local)682 isdn_tty_modem_hup(modem_info * info, int local)
683 {
684 isdn_ctrl cmd;
685 int di, ch;
686
687 if (!info)
688 return;
689
690 di = info->isdn_driver;
691 ch = info->isdn_channel;
692 if (di < 0 || ch < 0)
693 return;
694
695 info->isdn_driver = -1;
696 info->isdn_channel = -1;
697
698 #ifdef ISDN_DEBUG_MODEM_HUP
699 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
700 #endif
701 info->rcvsched = 0;
702 isdn_tty_flush_buffer(info->tty);
703 if (info->online) {
704 info->last_lhup = local;
705 info->online = 0;
706 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
707 }
708 #ifdef CONFIG_ISDN_AUDIO
709 info->vonline = 0;
710 #ifdef CONFIG_ISDN_TTY_FAX
711 info->faxonline = 0;
712 info->fax->phase = ISDN_FAX_PHASE_IDLE;
713 #endif
714 info->emu.vpar[4] = 0;
715 info->emu.vpar[5] = 8;
716 kfree(info->dtmf_state);
717 info->dtmf_state = NULL;
718 kfree(info->silence_state);
719 info->silence_state = NULL;
720 kfree(info->adpcms);
721 info->adpcms = NULL;
722 kfree(info->adpcmr);
723 info->adpcmr = NULL;
724 #endif
725 if ((info->msr & UART_MSR_RI) &&
726 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
727 isdn_tty_modem_result(RESULT_RUNG, info);
728 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
729 info->lsr |= UART_LSR_TEMT;
730
731 if (local) {
732 cmd.driver = di;
733 cmd.command = ISDN_CMD_HANGUP;
734 cmd.arg = ch;
735 isdn_command(&cmd);
736 }
737
738 isdn_all_eaz(di, ch);
739 info->emu.mdmreg[REG_RINGCNT] = 0;
740 isdn_free_channel(di, ch, 0);
741
742 if (info->drv_index >= 0) {
743 dev->m_idx[info->drv_index] = -1;
744 info->drv_index = -1;
745 }
746 }
747
748 /*
749 * Begin of a CAPI like interface, currently used only for
750 * supplementary service (CAPI 2.0 part III)
751 */
752 #include <linux/isdn/capicmd.h>
753 #include <linux/module.h>
754
755 int
isdn_tty_capi_facility(capi_msg * cm)756 isdn_tty_capi_facility(capi_msg *cm) {
757 return(-1); /* dummy */
758 }
759
760 /* isdn_tty_suspend() tries to suspend the current tty connection
761 */
762 static void
isdn_tty_suspend(char * id,modem_info * info,atemu * m)763 isdn_tty_suspend(char *id, modem_info * info, atemu * m)
764 {
765 isdn_ctrl cmd;
766
767 int l;
768
769 if (!info)
770 return;
771
772 #ifdef ISDN_DEBUG_MODEM_SERVICES
773 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
774 #endif
775 l = strlen(id);
776 if ((info->isdn_driver >= 0)) {
777 cmd.parm.cmsg.Length = l+18;
778 cmd.parm.cmsg.Command = CAPI_FACILITY;
779 cmd.parm.cmsg.Subcommand = CAPI_REQ;
780 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
781 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
782 cmd.parm.cmsg.para[1] = 0;
783 cmd.parm.cmsg.para[2] = l + 3;
784 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
785 cmd.parm.cmsg.para[4] = 0;
786 cmd.parm.cmsg.para[5] = l;
787 strncpy(&cmd.parm.cmsg.para[6], id, l);
788 cmd.command = CAPI_PUT_MESSAGE;
789 cmd.driver = info->isdn_driver;
790 cmd.arg = info->isdn_channel;
791 isdn_command(&cmd);
792 }
793 }
794
795 /* isdn_tty_resume() tries to resume a suspended call
796 * setup of the lower levels before that. unfortunately here is no
797 * checking for compatibility of used protocols implemented by Q931
798 * It does the same things like isdn_tty_dial, the last command
799 * is different, may be we can merge it.
800 */
801
802 static void
isdn_tty_resume(char * id,modem_info * info,atemu * m)803 isdn_tty_resume(char *id, modem_info * info, atemu * m)
804 {
805 int usg = ISDN_USAGE_MODEM;
806 int si = 7;
807 int l2 = m->mdmreg[REG_L2PROT];
808 isdn_ctrl cmd;
809 ulong flags;
810 int i;
811 int j;
812 int l;
813
814 l = strlen(id);
815 for (j = 7; j >= 0; j--)
816 if (m->mdmreg[REG_SI1] & (1 << j)) {
817 si = bit2si[j];
818 break;
819 }
820 usg = isdn_calc_usage(si, l2);
821 #ifdef CONFIG_ISDN_AUDIO
822 if ((si == 1) &&
823 (l2 != ISDN_PROTO_L2_MODEM)
824 #ifdef CONFIG_ISDN_TTY_FAX
825 && (l2 != ISDN_PROTO_L2_FAX)
826 #endif
827 ) {
828 l2 = ISDN_PROTO_L2_TRANS;
829 usg = ISDN_USAGE_VOICE;
830 }
831 #endif
832 m->mdmreg[REG_SI1I] = si2bit[si];
833 spin_lock_irqsave(&dev->lock, flags);
834 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
835 if (i < 0) {
836 spin_unlock_irqrestore(&dev->lock, flags);
837 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
838 } else {
839 info->isdn_driver = dev->drvmap[i];
840 info->isdn_channel = dev->chanmap[i];
841 info->drv_index = i;
842 dev->m_idx[i] = info->line;
843 dev->usage[i] |= ISDN_USAGE_OUTGOING;
844 info->last_dir = 1;
845 // strcpy(info->last_num, n);
846 isdn_info_update();
847 spin_unlock_irqrestore(&dev->lock, flags);
848 cmd.driver = info->isdn_driver;
849 cmd.arg = info->isdn_channel;
850 cmd.command = ISDN_CMD_CLREAZ;
851 isdn_command(&cmd);
852 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
853 cmd.driver = info->isdn_driver;
854 cmd.command = ISDN_CMD_SETEAZ;
855 isdn_command(&cmd);
856 cmd.driver = info->isdn_driver;
857 cmd.command = ISDN_CMD_SETL2;
858 info->last_l2 = l2;
859 cmd.arg = info->isdn_channel + (l2 << 8);
860 isdn_command(&cmd);
861 cmd.driver = info->isdn_driver;
862 cmd.command = ISDN_CMD_SETL3;
863 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
864 isdn_command(&cmd);
865 cmd.driver = info->isdn_driver;
866 cmd.arg = info->isdn_channel;
867 cmd.parm.cmsg.Length = l+18;
868 cmd.parm.cmsg.Command = CAPI_FACILITY;
869 cmd.parm.cmsg.Subcommand = CAPI_REQ;
870 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
871 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
872 cmd.parm.cmsg.para[1] = 0;
873 cmd.parm.cmsg.para[2] = l+3;
874 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
875 cmd.parm.cmsg.para[4] = 0;
876 cmd.parm.cmsg.para[5] = l;
877 strncpy(&cmd.parm.cmsg.para[6], id, l);
878 cmd.command =CAPI_PUT_MESSAGE;
879 info->dialing = 1;
880 // strcpy(dev->num[i], n);
881 isdn_info_update();
882 isdn_command(&cmd);
883 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
884 }
885 }
886
887 /* isdn_tty_send_msg() sends a message to a HL driver
888 * This is used for hybrid modem cards to send AT commands to it
889 */
890
891 static void
isdn_tty_send_msg(modem_info * info,atemu * m,char * msg)892 isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
893 {
894 int usg = ISDN_USAGE_MODEM;
895 int si = 7;
896 int l2 = m->mdmreg[REG_L2PROT];
897 isdn_ctrl cmd;
898 ulong flags;
899 int i;
900 int j;
901 int l;
902
903 l = strlen(msg);
904 if (!l) {
905 isdn_tty_modem_result(RESULT_ERROR, info);
906 return;
907 }
908 for (j = 7; j >= 0; j--)
909 if (m->mdmreg[REG_SI1] & (1 << j)) {
910 si = bit2si[j];
911 break;
912 }
913 usg = isdn_calc_usage(si, l2);
914 #ifdef CONFIG_ISDN_AUDIO
915 if ((si == 1) &&
916 (l2 != ISDN_PROTO_L2_MODEM)
917 #ifdef CONFIG_ISDN_TTY_FAX
918 && (l2 != ISDN_PROTO_L2_FAX)
919 #endif
920 ) {
921 l2 = ISDN_PROTO_L2_TRANS;
922 usg = ISDN_USAGE_VOICE;
923 }
924 #endif
925 m->mdmreg[REG_SI1I] = si2bit[si];
926 spin_lock_irqsave(&dev->lock, flags);
927 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
928 if (i < 0) {
929 spin_unlock_irqrestore(&dev->lock, flags);
930 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
931 } else {
932 info->isdn_driver = dev->drvmap[i];
933 info->isdn_channel = dev->chanmap[i];
934 info->drv_index = i;
935 dev->m_idx[i] = info->line;
936 dev->usage[i] |= ISDN_USAGE_OUTGOING;
937 info->last_dir = 1;
938 isdn_info_update();
939 spin_unlock_irqrestore(&dev->lock, flags);
940 cmd.driver = info->isdn_driver;
941 cmd.arg = info->isdn_channel;
942 cmd.command = ISDN_CMD_CLREAZ;
943 isdn_command(&cmd);
944 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
945 cmd.driver = info->isdn_driver;
946 cmd.command = ISDN_CMD_SETEAZ;
947 isdn_command(&cmd);
948 cmd.driver = info->isdn_driver;
949 cmd.command = ISDN_CMD_SETL2;
950 info->last_l2 = l2;
951 cmd.arg = info->isdn_channel + (l2 << 8);
952 isdn_command(&cmd);
953 cmd.driver = info->isdn_driver;
954 cmd.command = ISDN_CMD_SETL3;
955 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
956 isdn_command(&cmd);
957 cmd.driver = info->isdn_driver;
958 cmd.arg = info->isdn_channel;
959 cmd.parm.cmsg.Length = l+14;
960 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
961 cmd.parm.cmsg.Subcommand = CAPI_REQ;
962 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
963 cmd.parm.cmsg.para[0] = l+1;
964 strncpy(&cmd.parm.cmsg.para[1], msg, l);
965 cmd.parm.cmsg.para[l+1] = 0xd;
966 cmd.command =CAPI_PUT_MESSAGE;
967 /* info->dialing = 1;
968 strcpy(dev->num[i], n);
969 isdn_info_update();
970 */
971 isdn_command(&cmd);
972 }
973 }
974
975 static inline int
isdn_tty_paranoia_check(modem_info * info,char * name,const char * routine)976 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
977 {
978 #ifdef MODEM_PARANOIA_CHECK
979 if (!info) {
980 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
981 name, routine);
982 return 1;
983 }
984 if (info->magic != ISDN_ASYNC_MAGIC) {
985 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
986 name, routine);
987 return 1;
988 }
989 #endif
990 return 0;
991 }
992
993 /*
994 * This routine is called to set the UART divisor registers to match
995 * the specified baud rate for a serial port.
996 */
997 static void
isdn_tty_change_speed(modem_info * info)998 isdn_tty_change_speed(modem_info * info)
999 {
1000 uint cflag,
1001 cval,
1002 quot;
1003 int i;
1004
1005 if (!info->tty || !info->tty->termios)
1006 return;
1007 cflag = info->tty->termios->c_cflag;
1008
1009 quot = i = cflag & CBAUD;
1010 if (i & CBAUDEX) {
1011 i &= ~CBAUDEX;
1012 if (i < 1 || i > 2)
1013 info->tty->termios->c_cflag &= ~CBAUDEX;
1014 else
1015 i += 15;
1016 }
1017 if (quot) {
1018 info->mcr |= UART_MCR_DTR;
1019 isdn_tty_modem_ncarrier(info);
1020 } else {
1021 info->mcr &= ~UART_MCR_DTR;
1022 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1023 #ifdef ISDN_DEBUG_MODEM_HUP
1024 printk(KERN_DEBUG "Mhup in changespeed\n");
1025 #endif
1026 if (info->online)
1027 info->ncarrier = 1;
1028 isdn_tty_modem_reset_regs(info, 0);
1029 isdn_tty_modem_hup(info, 1);
1030 }
1031 return;
1032 }
1033 /* byte size and parity */
1034 cval = cflag & (CSIZE | CSTOPB);
1035 cval >>= 4;
1036 if (cflag & PARENB)
1037 cval |= UART_LCR_PARITY;
1038 if (!(cflag & PARODD))
1039 cval |= UART_LCR_EPAR;
1040
1041 /* CTS flow control flag and modem status interrupts */
1042 if (cflag & CRTSCTS) {
1043 info->flags |= ISDN_ASYNC_CTS_FLOW;
1044 } else
1045 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1046 if (cflag & CLOCAL)
1047 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1048 else {
1049 info->flags |= ISDN_ASYNC_CHECK_CD;
1050 }
1051 }
1052
1053 static int
isdn_tty_startup(modem_info * info)1054 isdn_tty_startup(modem_info * info)
1055 {
1056 if (info->flags & ISDN_ASYNC_INITIALIZED)
1057 return 0;
1058 isdn_lock_drivers();
1059 #ifdef ISDN_DEBUG_MODEM_OPEN
1060 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1061 #endif
1062 /*
1063 * Now, initialize the UART
1064 */
1065 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1066 if (info->tty)
1067 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1068 /*
1069 * and set the speed of the serial port
1070 */
1071 isdn_tty_change_speed(info);
1072
1073 info->flags |= ISDN_ASYNC_INITIALIZED;
1074 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1075 info->send_outstanding = 0;
1076 return 0;
1077 }
1078
1079 /*
1080 * This routine will shutdown a serial port; interrupts are disabled, and
1081 * DTR is dropped if the hangup on close termio flag is on.
1082 */
1083 static void
isdn_tty_shutdown(modem_info * info)1084 isdn_tty_shutdown(modem_info * info)
1085 {
1086 if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1087 return;
1088 #ifdef ISDN_DEBUG_MODEM_OPEN
1089 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1090 #endif
1091 isdn_unlock_drivers();
1092 info->msr &= ~UART_MSR_RI;
1093 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1094 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1095 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1096 isdn_tty_modem_reset_regs(info, 0);
1097 #ifdef ISDN_DEBUG_MODEM_HUP
1098 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1099 #endif
1100 isdn_tty_modem_hup(info, 1);
1101 }
1102 }
1103 if (info->tty)
1104 set_bit(TTY_IO_ERROR, &info->tty->flags);
1105
1106 info->flags &= ~ISDN_ASYNC_INITIALIZED;
1107 }
1108
1109 /* isdn_tty_write() is the main send-routine. It is called from the upper
1110 * levels within the kernel to perform sending data. Depending on the
1111 * online-flag it either directs output to the at-command-interpreter or
1112 * to the lower level. Additional tasks done here:
1113 * - If online, check for escape-sequence (+++)
1114 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1115 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1116 * - If dialing, abort dial.
1117 */
1118 static int
isdn_tty_write(struct tty_struct * tty,const u_char * buf,int count)1119 isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
1120 {
1121 int c;
1122 int total = 0;
1123 modem_info *info = (modem_info *) tty->driver_data;
1124 atemu *m = &info->emu;
1125
1126 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1127 return 0;
1128 /* See isdn_tty_senddown() */
1129 atomic_inc(&info->xmit_lock);
1130 while (1) {
1131 c = count;
1132 if (c > info->xmit_size - info->xmit_count)
1133 c = info->xmit_size - info->xmit_count;
1134 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1135 c = dev->drv[info->isdn_driver]->maxbufsize;
1136 if (c <= 0)
1137 break;
1138 if ((info->online > 1)
1139 #ifdef CONFIG_ISDN_AUDIO
1140 || (info->vonline & 3)
1141 #endif
1142 ) {
1143 #ifdef CONFIG_ISDN_AUDIO
1144 if (!info->vonline)
1145 #endif
1146 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1147 &(m->pluscount),
1148 &(m->lastplus));
1149 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1150 #ifdef CONFIG_ISDN_AUDIO
1151 if (info->vonline) {
1152 int cc = isdn_tty_handleDLEdown(info, m, c);
1153 if (info->vonline & 2) {
1154 if (!cc) {
1155 /* If DLE decoding results in zero-transmit, but
1156 * c originally was non-zero, do a wakeup.
1157 */
1158 tty_wakeup(tty);
1159 info->msr |= UART_MSR_CTS;
1160 info->lsr |= UART_LSR_TEMT;
1161 }
1162 info->xmit_count += cc;
1163 }
1164 if ((info->vonline & 3) == 1) {
1165 /* Do NOT handle Ctrl-Q or Ctrl-S
1166 * when in full-duplex audio mode.
1167 */
1168 if (isdn_tty_end_vrx(buf, c)) {
1169 info->vonline &= ~1;
1170 #ifdef ISDN_DEBUG_MODEM_VOICE
1171 printk(KERN_DEBUG
1172 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1173 info->line);
1174 #endif
1175 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1176 }
1177 }
1178 } else
1179 if (TTY_IS_FCLASS1(info)) {
1180 int cc = isdn_tty_handleDLEdown(info, m, c);
1181
1182 if (info->vonline & 4) { /* ETX seen */
1183 isdn_ctrl c;
1184
1185 c.command = ISDN_CMD_FAXCMD;
1186 c.driver = info->isdn_driver;
1187 c.arg = info->isdn_channel;
1188 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1189 c.parm.aux.subcmd = ETX;
1190 isdn_command(&c);
1191 }
1192 info->vonline = 0;
1193 #ifdef ISDN_DEBUG_MODEM_VOICE
1194 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1195 #endif
1196 info->xmit_count += cc;
1197 } else
1198 #endif
1199 info->xmit_count += c;
1200 } else {
1201 info->msr |= UART_MSR_CTS;
1202 info->lsr |= UART_LSR_TEMT;
1203 if (info->dialing) {
1204 info->dialing = 0;
1205 #ifdef ISDN_DEBUG_MODEM_HUP
1206 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1207 #endif
1208 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1209 isdn_tty_modem_hup(info, 1);
1210 } else
1211 c = isdn_tty_edit_at(buf, c, info);
1212 }
1213 buf += c;
1214 count -= c;
1215 total += c;
1216 }
1217 atomic_dec(&info->xmit_lock);
1218 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1219 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1220 isdn_tty_senddown(info);
1221 isdn_tty_tint(info);
1222 }
1223 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1224 }
1225 return total;
1226 }
1227
1228 static int
isdn_tty_write_room(struct tty_struct * tty)1229 isdn_tty_write_room(struct tty_struct *tty)
1230 {
1231 modem_info *info = (modem_info *) tty->driver_data;
1232 int ret;
1233
1234 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1235 return 0;
1236 if (!info->online)
1237 return info->xmit_size;
1238 ret = info->xmit_size - info->xmit_count;
1239 return (ret < 0) ? 0 : ret;
1240 }
1241
1242 static int
isdn_tty_chars_in_buffer(struct tty_struct * tty)1243 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1244 {
1245 modem_info *info = (modem_info *) tty->driver_data;
1246
1247 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1248 return 0;
1249 if (!info->online)
1250 return 0;
1251 return (info->xmit_count);
1252 }
1253
1254 static void
isdn_tty_flush_buffer(struct tty_struct * tty)1255 isdn_tty_flush_buffer(struct tty_struct *tty)
1256 {
1257 modem_info *info;
1258
1259 if (!tty) {
1260 return;
1261 }
1262 info = (modem_info *) tty->driver_data;
1263 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1264 return;
1265 }
1266 isdn_tty_cleanup_xmit(info);
1267 info->xmit_count = 0;
1268 tty_wakeup(tty);
1269 }
1270
1271 static void
isdn_tty_flush_chars(struct tty_struct * tty)1272 isdn_tty_flush_chars(struct tty_struct *tty)
1273 {
1274 modem_info *info = (modem_info *) tty->driver_data;
1275
1276 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1277 return;
1278 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1279 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1280 }
1281
1282 /*
1283 * ------------------------------------------------------------
1284 * isdn_tty_throttle()
1285 *
1286 * This routine is called by the upper-layer tty layer to signal that
1287 * incoming characters should be throttled.
1288 * ------------------------------------------------------------
1289 */
1290 static void
isdn_tty_throttle(struct tty_struct * tty)1291 isdn_tty_throttle(struct tty_struct *tty)
1292 {
1293 modem_info *info = (modem_info *) tty->driver_data;
1294
1295 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1296 return;
1297 if (I_IXOFF(tty))
1298 info->x_char = STOP_CHAR(tty);
1299 info->mcr &= ~UART_MCR_RTS;
1300 }
1301
1302 static void
isdn_tty_unthrottle(struct tty_struct * tty)1303 isdn_tty_unthrottle(struct tty_struct *tty)
1304 {
1305 modem_info *info = (modem_info *) tty->driver_data;
1306
1307 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1308 return;
1309 if (I_IXOFF(tty)) {
1310 if (info->x_char)
1311 info->x_char = 0;
1312 else
1313 info->x_char = START_CHAR(tty);
1314 }
1315 info->mcr |= UART_MCR_RTS;
1316 }
1317
1318 /*
1319 * ------------------------------------------------------------
1320 * isdn_tty_ioctl() and friends
1321 * ------------------------------------------------------------
1322 */
1323
1324 /*
1325 * isdn_tty_get_lsr_info - get line status register info
1326 *
1327 * Purpose: Let user call ioctl() to get info when the UART physically
1328 * is emptied. On bus types like RS485, the transmitter must
1329 * release the bus after transmitting. This must be done when
1330 * the transmit shift register is empty, not be done when the
1331 * transmit holding register is empty. This functionality
1332 * allows RS485 driver to be written in user space.
1333 */
1334 static int
isdn_tty_get_lsr_info(modem_info * info,uint __user * value)1335 isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1336 {
1337 u_char status;
1338 uint result;
1339
1340 status = info->lsr;
1341 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1342 return put_user(result, value);
1343 }
1344
1345
1346 static int
isdn_tty_tiocmget(struct tty_struct * tty)1347 isdn_tty_tiocmget(struct tty_struct *tty)
1348 {
1349 modem_info *info = (modem_info *) tty->driver_data;
1350 u_char control, status;
1351
1352 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1353 return -ENODEV;
1354 if (tty->flags & (1 << TTY_IO_ERROR))
1355 return -EIO;
1356
1357 mutex_lock(&modem_info_mutex);
1358 #ifdef ISDN_DEBUG_MODEM_IOCTL
1359 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1360 #endif
1361
1362 control = info->mcr;
1363 status = info->msr;
1364 mutex_unlock(&modem_info_mutex);
1365 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1366 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1367 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1368 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1369 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1370 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1371 }
1372
1373 static int
isdn_tty_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)1374 isdn_tty_tiocmset(struct tty_struct *tty,
1375 unsigned int set, unsigned int clear)
1376 {
1377 modem_info *info = (modem_info *) tty->driver_data;
1378
1379 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1380 return -ENODEV;
1381 if (tty->flags & (1 << TTY_IO_ERROR))
1382 return -EIO;
1383
1384 #ifdef ISDN_DEBUG_MODEM_IOCTL
1385 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1386 #endif
1387
1388 mutex_lock(&modem_info_mutex);
1389 if (set & TIOCM_RTS)
1390 info->mcr |= UART_MCR_RTS;
1391 if (set & TIOCM_DTR) {
1392 info->mcr |= UART_MCR_DTR;
1393 isdn_tty_modem_ncarrier(info);
1394 }
1395
1396 if (clear & TIOCM_RTS)
1397 info->mcr &= ~UART_MCR_RTS;
1398 if (clear & TIOCM_DTR) {
1399 info->mcr &= ~UART_MCR_DTR;
1400 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1401 isdn_tty_modem_reset_regs(info, 0);
1402 #ifdef ISDN_DEBUG_MODEM_HUP
1403 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1404 #endif
1405 if (info->online)
1406 info->ncarrier = 1;
1407 isdn_tty_modem_hup(info, 1);
1408 }
1409 }
1410 mutex_unlock(&modem_info_mutex);
1411 return 0;
1412 }
1413
1414 static int
isdn_tty_ioctl(struct tty_struct * tty,uint cmd,ulong arg)1415 isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg)
1416 {
1417 modem_info *info = (modem_info *) tty->driver_data;
1418 int retval;
1419
1420 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1421 return -ENODEV;
1422 if (tty->flags & (1 << TTY_IO_ERROR))
1423 return -EIO;
1424 switch (cmd) {
1425 case TCSBRK: /* SVID version: non-zero arg --> no break */
1426 #ifdef ISDN_DEBUG_MODEM_IOCTL
1427 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1428 #endif
1429 retval = tty_check_change(tty);
1430 if (retval)
1431 return retval;
1432 tty_wait_until_sent(tty, 0);
1433 return 0;
1434 case TCSBRKP: /* support for POSIX tcsendbreak() */
1435 #ifdef ISDN_DEBUG_MODEM_IOCTL
1436 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1437 #endif
1438 retval = tty_check_change(tty);
1439 if (retval)
1440 return retval;
1441 tty_wait_until_sent(tty, 0);
1442 return 0;
1443 case TIOCSERGETLSR: /* Get line status register */
1444 #ifdef ISDN_DEBUG_MODEM_IOCTL
1445 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1446 #endif
1447 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1448 default:
1449 #ifdef ISDN_DEBUG_MODEM_IOCTL
1450 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1451 #endif
1452 return -ENOIOCTLCMD;
1453 }
1454 return 0;
1455 }
1456
1457 static void
isdn_tty_set_termios(struct tty_struct * tty,struct ktermios * old_termios)1458 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1459 {
1460 modem_info *info = (modem_info *) tty->driver_data;
1461
1462 if (!old_termios)
1463 isdn_tty_change_speed(info);
1464 else {
1465 if (tty->termios->c_cflag == old_termios->c_cflag &&
1466 tty->termios->c_ispeed == old_termios->c_ispeed &&
1467 tty->termios->c_ospeed == old_termios->c_ospeed)
1468 return;
1469 isdn_tty_change_speed(info);
1470 if ((old_termios->c_cflag & CRTSCTS) &&
1471 !(tty->termios->c_cflag & CRTSCTS))
1472 tty->hw_stopped = 0;
1473 }
1474 }
1475
1476 /*
1477 * ------------------------------------------------------------
1478 * isdn_tty_open() and friends
1479 * ------------------------------------------------------------
1480 */
1481 static int
isdn_tty_block_til_ready(struct tty_struct * tty,struct file * filp,modem_info * info)1482 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1483 {
1484 DECLARE_WAITQUEUE(wait, NULL);
1485 int do_clocal = 0;
1486 int retval;
1487
1488 /*
1489 * If the device is in the middle of being closed, then block
1490 * until it's done, and then try again.
1491 */
1492 if (tty_hung_up_p(filp) ||
1493 (info->flags & ISDN_ASYNC_CLOSING)) {
1494 if (info->flags & ISDN_ASYNC_CLOSING)
1495 interruptible_sleep_on(&info->close_wait);
1496 #ifdef MODEM_DO_RESTART
1497 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1498 return -EAGAIN;
1499 else
1500 return -ERESTARTSYS;
1501 #else
1502 return -EAGAIN;
1503 #endif
1504 }
1505 /*
1506 * If non-blocking mode is set, then make the check up front
1507 * and then exit.
1508 */
1509 if ((filp->f_flags & O_NONBLOCK) ||
1510 (tty->flags & (1 << TTY_IO_ERROR))) {
1511 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1512 return -EBUSY;
1513 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1514 return 0;
1515 }
1516 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1517 if (info->normal_termios.c_cflag & CLOCAL)
1518 do_clocal = 1;
1519 } else {
1520 if (tty->termios->c_cflag & CLOCAL)
1521 do_clocal = 1;
1522 }
1523 /*
1524 * Block waiting for the carrier detect and the line to become
1525 * free (i.e., not in use by the callout). While we are in
1526 * this loop, info->count is dropped by one, so that
1527 * isdn_tty_close() knows when to free things. We restore it upon
1528 * exit, either normal or abnormal.
1529 */
1530 retval = 0;
1531 add_wait_queue(&info->open_wait, &wait);
1532 #ifdef ISDN_DEBUG_MODEM_OPEN
1533 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1534 info->line, info->count);
1535 #endif
1536 if (!(tty_hung_up_p(filp)))
1537 info->count--;
1538 info->blocked_open++;
1539 while (1) {
1540 set_current_state(TASK_INTERRUPTIBLE);
1541 if (tty_hung_up_p(filp) ||
1542 !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1543 #ifdef MODEM_DO_RESTART
1544 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1545 retval = -EAGAIN;
1546 else
1547 retval = -ERESTARTSYS;
1548 #else
1549 retval = -EAGAIN;
1550 #endif
1551 break;
1552 }
1553 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1554 !(info->flags & ISDN_ASYNC_CLOSING) &&
1555 (do_clocal || (info->msr & UART_MSR_DCD))) {
1556 break;
1557 }
1558 if (signal_pending(current)) {
1559 retval = -ERESTARTSYS;
1560 break;
1561 }
1562 #ifdef ISDN_DEBUG_MODEM_OPEN
1563 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1564 info->line, info->count);
1565 #endif
1566 schedule();
1567 }
1568 current->state = TASK_RUNNING;
1569 remove_wait_queue(&info->open_wait, &wait);
1570 if (!tty_hung_up_p(filp))
1571 info->count++;
1572 info->blocked_open--;
1573 #ifdef ISDN_DEBUG_MODEM_OPEN
1574 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1575 info->line, info->count);
1576 #endif
1577 if (retval)
1578 return retval;
1579 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1580 return 0;
1581 }
1582
1583 /*
1584 * This routine is called whenever a serial port is opened. It
1585 * enables interrupts for a serial port, linking in its async structure into
1586 * the IRQ chain. It also performs the serial-specific
1587 * initialization for the tty structure.
1588 */
1589 static int
isdn_tty_open(struct tty_struct * tty,struct file * filp)1590 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1591 {
1592 modem_info *info;
1593 int retval, line;
1594
1595 line = tty->index;
1596 if (line < 0 || line >= ISDN_MAX_CHANNELS)
1597 return -ENODEV;
1598 info = &dev->mdm.info[line];
1599 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1600 return -ENODEV;
1601 if (!try_module_get(info->owner)) {
1602 printk(KERN_WARNING "%s: cannot reserve module\n", __func__);
1603 return -ENODEV;
1604 }
1605 #ifdef ISDN_DEBUG_MODEM_OPEN
1606 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1607 info->count);
1608 #endif
1609 info->count++;
1610 tty->driver_data = info;
1611 info->tty = tty;
1612 /*
1613 * Start up serial port
1614 */
1615 retval = isdn_tty_startup(info);
1616 if (retval) {
1617 #ifdef ISDN_DEBUG_MODEM_OPEN
1618 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1619 #endif
1620 module_put(info->owner);
1621 return retval;
1622 }
1623 retval = isdn_tty_block_til_ready(tty, filp, info);
1624 if (retval) {
1625 #ifdef ISDN_DEBUG_MODEM_OPEN
1626 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1627 #endif
1628 module_put(info->owner);
1629 return retval;
1630 }
1631 #ifdef ISDN_DEBUG_MODEM_OPEN
1632 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1633 #endif
1634 dev->modempoll++;
1635 #ifdef ISDN_DEBUG_MODEM_OPEN
1636 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1637 #endif
1638 return 0;
1639 }
1640
1641 static void
isdn_tty_close(struct tty_struct * tty,struct file * filp)1642 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1643 {
1644 modem_info *info = (modem_info *) tty->driver_data;
1645 ulong timeout;
1646
1647 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1648 return;
1649 if (tty_hung_up_p(filp)) {
1650 #ifdef ISDN_DEBUG_MODEM_OPEN
1651 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1652 #endif
1653 return;
1654 }
1655 if ((tty->count == 1) && (info->count != 1)) {
1656 /*
1657 * Uh, oh. tty->count is 1, which means that the tty
1658 * structure will be freed. Info->count should always
1659 * be one in these conditions. If it's greater than
1660 * one, we've got real problems, since it means the
1661 * serial port won't be shutdown.
1662 */
1663 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1664 "info->count is %d\n", info->count);
1665 info->count = 1;
1666 }
1667 if (--info->count < 0) {
1668 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1669 info->line, info->count);
1670 info->count = 0;
1671 }
1672 if (info->count) {
1673 #ifdef ISDN_DEBUG_MODEM_OPEN
1674 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1675 #endif
1676 module_put(info->owner);
1677 return;
1678 }
1679 info->flags |= ISDN_ASYNC_CLOSING;
1680 /*
1681 * Save the termios structure, since this port may have
1682 * separate termios for callout and dialin.
1683 */
1684 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1685 info->normal_termios = *tty->termios;
1686 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1687 info->callout_termios = *tty->termios;
1688
1689 tty->closing = 1;
1690 /*
1691 * At this point we stop accepting input. To do this, we
1692 * disable the receive line status interrupts, and tell the
1693 * interrupt driver to stop checking the data ready bit in the
1694 * line status register.
1695 */
1696 if (info->flags & ISDN_ASYNC_INITIALIZED) {
1697 tty_wait_until_sent_from_close(tty, 3000); /* 30 seconds timeout */
1698 /*
1699 * Before we drop DTR, make sure the UART transmitter
1700 * has completely drained; this is especially
1701 * important if there is a transmit FIFO!
1702 */
1703 timeout = jiffies + HZ;
1704 while (!(info->lsr & UART_LSR_TEMT)) {
1705 schedule_timeout_interruptible(20);
1706 if (time_after(jiffies,timeout))
1707 break;
1708 }
1709 }
1710 dev->modempoll--;
1711 isdn_tty_shutdown(info);
1712 isdn_tty_flush_buffer(tty);
1713 tty_ldisc_flush(tty);
1714 info->tty = NULL;
1715 info->ncarrier = 0;
1716 tty->closing = 0;
1717 module_put(info->owner);
1718 if (info->blocked_open) {
1719 msleep_interruptible(500);
1720 wake_up_interruptible(&info->open_wait);
1721 }
1722 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1723 wake_up_interruptible(&info->close_wait);
1724 #ifdef ISDN_DEBUG_MODEM_OPEN
1725 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1726 #endif
1727 }
1728
1729 /*
1730 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1731 */
1732 static void
isdn_tty_hangup(struct tty_struct * tty)1733 isdn_tty_hangup(struct tty_struct *tty)
1734 {
1735 modem_info *info = (modem_info *) tty->driver_data;
1736
1737 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1738 return;
1739 isdn_tty_shutdown(info);
1740 info->count = 0;
1741 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1742 info->tty = NULL;
1743 wake_up_interruptible(&info->open_wait);
1744 }
1745
1746 /* This routine initializes all emulator-data.
1747 */
1748 static void
isdn_tty_reset_profile(atemu * m)1749 isdn_tty_reset_profile(atemu * m)
1750 {
1751 m->profile[0] = 0;
1752 m->profile[1] = 0;
1753 m->profile[2] = 43;
1754 m->profile[3] = 13;
1755 m->profile[4] = 10;
1756 m->profile[5] = 8;
1757 m->profile[6] = 3;
1758 m->profile[7] = 60;
1759 m->profile[8] = 2;
1760 m->profile[9] = 6;
1761 m->profile[10] = 7;
1762 m->profile[11] = 70;
1763 m->profile[12] = 0x45;
1764 m->profile[13] = 4;
1765 m->profile[14] = ISDN_PROTO_L2_X75I;
1766 m->profile[15] = ISDN_PROTO_L3_TRANS;
1767 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1768 m->profile[17] = ISDN_MODEM_WINSIZE;
1769 m->profile[18] = 4;
1770 m->profile[19] = 0;
1771 m->profile[20] = 0;
1772 m->profile[23] = 0;
1773 m->pmsn[0] = '\0';
1774 m->plmsn[0] = '\0';
1775 }
1776
1777 #ifdef CONFIG_ISDN_AUDIO
1778 static void
isdn_tty_modem_reset_vpar(atemu * m)1779 isdn_tty_modem_reset_vpar(atemu * m)
1780 {
1781 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1782 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1783 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1784 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1785 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1786 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1787 }
1788 #endif
1789
1790 #ifdef CONFIG_ISDN_TTY_FAX
1791 static void
isdn_tty_modem_reset_faxpar(modem_info * info)1792 isdn_tty_modem_reset_faxpar(modem_info * info)
1793 {
1794 T30_s *f = info->fax;
1795
1796 f->code = 0;
1797 f->phase = ISDN_FAX_PHASE_IDLE;
1798 f->direction = 0;
1799 f->resolution = 1; /* fine */
1800 f->rate = 5; /* 14400 bit/s */
1801 f->width = 0;
1802 f->length = 0;
1803 f->compression = 0;
1804 f->ecm = 0;
1805 f->binary = 0;
1806 f->scantime = 0;
1807 memset(&f->id[0], 32, FAXIDLEN - 1);
1808 f->id[FAXIDLEN - 1] = 0;
1809 f->badlin = 0;
1810 f->badmul = 0;
1811 f->bor = 0;
1812 f->nbc = 0;
1813 f->cq = 0;
1814 f->cr = 0;
1815 f->ctcrty = 0;
1816 f->minsp = 0;
1817 f->phcto = 30;
1818 f->rel = 0;
1819 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1820 f->pollid[FAXIDLEN - 1] = 0;
1821 }
1822 #endif
1823
1824 static void
isdn_tty_modem_reset_regs(modem_info * info,int force)1825 isdn_tty_modem_reset_regs(modem_info * info, int force)
1826 {
1827 atemu *m = &info->emu;
1828 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1829 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1830 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1831 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1832 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1833 }
1834 #ifdef CONFIG_ISDN_AUDIO
1835 isdn_tty_modem_reset_vpar(m);
1836 #endif
1837 #ifdef CONFIG_ISDN_TTY_FAX
1838 isdn_tty_modem_reset_faxpar(info);
1839 #endif
1840 m->mdmcmdl = 0;
1841 }
1842
1843 static void
modem_write_profile(atemu * m)1844 modem_write_profile(atemu * m)
1845 {
1846 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1847 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1848 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1849 if (dev->profd)
1850 send_sig(SIGIO, dev->profd, 1);
1851 }
1852
1853 static const struct tty_operations modem_ops = {
1854 .open = isdn_tty_open,
1855 .close = isdn_tty_close,
1856 .write = isdn_tty_write,
1857 .flush_chars = isdn_tty_flush_chars,
1858 .write_room = isdn_tty_write_room,
1859 .chars_in_buffer = isdn_tty_chars_in_buffer,
1860 .flush_buffer = isdn_tty_flush_buffer,
1861 .ioctl = isdn_tty_ioctl,
1862 .throttle = isdn_tty_throttle,
1863 .unthrottle = isdn_tty_unthrottle,
1864 .set_termios = isdn_tty_set_termios,
1865 .hangup = isdn_tty_hangup,
1866 .tiocmget = isdn_tty_tiocmget,
1867 .tiocmset = isdn_tty_tiocmset,
1868 };
1869
1870 int
isdn_tty_modem_init(void)1871 isdn_tty_modem_init(void)
1872 {
1873 isdn_modem_t *m;
1874 int i, retval;
1875 modem_info *info;
1876
1877 m = &dev->mdm;
1878 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1879 if (!m->tty_modem)
1880 return -ENOMEM;
1881 m->tty_modem->name = "ttyI";
1882 m->tty_modem->major = ISDN_TTY_MAJOR;
1883 m->tty_modem->minor_start = 0;
1884 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1885 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1886 m->tty_modem->init_termios = tty_std_termios;
1887 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1888 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1889 m->tty_modem->driver_name = "isdn_tty";
1890 tty_set_operations(m->tty_modem, &modem_ops);
1891 retval = tty_register_driver(m->tty_modem);
1892 if (retval) {
1893 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1894 goto err;
1895 }
1896 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1897 info = &m->info[i];
1898 #ifdef CONFIG_ISDN_TTY_FAX
1899 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1900 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1901 retval = -ENOMEM;
1902 goto err_unregister;
1903 }
1904 #endif
1905 #ifdef MODULE
1906 info->owner = THIS_MODULE;
1907 #endif
1908 spin_lock_init(&info->readlock);
1909 sprintf(info->last_cause, "0000");
1910 sprintf(info->last_num, "none");
1911 info->last_dir = 0;
1912 info->last_lhup = 1;
1913 info->last_l2 = -1;
1914 info->last_si = 0;
1915 isdn_tty_reset_profile(&info->emu);
1916 isdn_tty_modem_reset_regs(info, 1);
1917 info->magic = ISDN_ASYNC_MAGIC;
1918 info->line = i;
1919 info->tty = NULL;
1920 info->x_char = 0;
1921 info->count = 0;
1922 info->blocked_open = 0;
1923 init_waitqueue_head(&info->open_wait);
1924 init_waitqueue_head(&info->close_wait);
1925 info->isdn_driver = -1;
1926 info->isdn_channel = -1;
1927 info->drv_index = -1;
1928 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1929 init_timer(&info->nc_timer);
1930 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1931 info->nc_timer.data = (unsigned long) info;
1932 skb_queue_head_init(&info->xmit_queue);
1933 #ifdef CONFIG_ISDN_AUDIO
1934 skb_queue_head_init(&info->dtmf_queue);
1935 #endif
1936 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1937 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1938 retval = -ENOMEM;
1939 goto err_unregister;
1940 }
1941 /* Make room for T.70 header */
1942 info->xmit_buf += 4;
1943 }
1944 return 0;
1945 err_unregister:
1946 for (i--; i >= 0; i--) {
1947 info = &m->info[i];
1948 #ifdef CONFIG_ISDN_TTY_FAX
1949 kfree(info->fax);
1950 #endif
1951 kfree(info->xmit_buf - 4);
1952 }
1953 tty_unregister_driver(m->tty_modem);
1954 err:
1955 put_tty_driver(m->tty_modem);
1956 m->tty_modem = NULL;
1957 return retval;
1958 }
1959
1960 void
isdn_tty_exit(void)1961 isdn_tty_exit(void)
1962 {
1963 modem_info *info;
1964 int i;
1965
1966 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1967 info = &dev->mdm.info[i];
1968 isdn_tty_cleanup_xmit(info);
1969 #ifdef CONFIG_ISDN_TTY_FAX
1970 kfree(info->fax);
1971 #endif
1972 kfree(info->xmit_buf - 4);
1973 }
1974 tty_unregister_driver(dev->mdm.tty_modem);
1975 put_tty_driver(dev->mdm.tty_modem);
1976 dev->mdm.tty_modem = NULL;
1977 }
1978
1979
1980 /*
1981 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1982 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1983 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1984 */
1985
1986 static int
isdn_tty_match_icall(char * cid,atemu * emu,int di)1987 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1988 {
1989 #ifdef ISDN_DEBUG_MODEM_ICALL
1990 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1991 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1992 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1993 #endif
1994 if (strlen(emu->lmsn)) {
1995 char *p = emu->lmsn;
1996 char *q;
1997 int tmp;
1998 int ret = 0;
1999
2000 while (1) {
2001 if ((q = strchr(p, ';')))
2002 *q = '\0';
2003 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2004 ret = tmp;
2005 #ifdef ISDN_DEBUG_MODEM_ICALL
2006 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2007 p, isdn_map_eaz2msn(emu->msn, di), tmp);
2008 #endif
2009 if (q) {
2010 *q = ';';
2011 p = q;
2012 p++;
2013 }
2014 if (!tmp)
2015 return 0;
2016 if (!q)
2017 break;
2018 }
2019 return ret;
2020 } else {
2021 int tmp;
2022 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2023 #ifdef ISDN_DEBUG_MODEM_ICALL
2024 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2025 isdn_map_eaz2msn(emu->msn, di), tmp);
2026 #endif
2027 return tmp;
2028 }
2029 }
2030
2031 /*
2032 * An incoming call-request has arrived.
2033 * Search the tty-devices for an appropriate device and bind
2034 * it to the ISDN-Channel.
2035 * Return:
2036 *
2037 * 0 = No matching device found.
2038 * 1 = A matching device found.
2039 * 3 = No match found, but eventually would match, if
2040 * CID is longer.
2041 */
2042 int
isdn_tty_find_icall(int di,int ch,setup_parm * setup)2043 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2044 {
2045 char *eaz;
2046 int i;
2047 int wret;
2048 int idx;
2049 int si1;
2050 int si2;
2051 char *nr;
2052 ulong flags;
2053
2054 if (!setup->phone[0]) {
2055 nr = "0";
2056 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2057 } else
2058 nr = setup->phone;
2059 si1 = (int) setup->si1;
2060 si2 = (int) setup->si2;
2061 if (!setup->eazmsn[0]) {
2062 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2063 eaz = "0";
2064 } else
2065 eaz = setup->eazmsn;
2066 #ifdef ISDN_DEBUG_MODEM_ICALL
2067 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2068 #endif
2069 wret = 0;
2070 spin_lock_irqsave(&dev->lock, flags);
2071 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2072 modem_info *info = &dev->mdm.info[i];
2073
2074 if (info->count == 0)
2075 continue;
2076 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
2077 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
2078 idx = isdn_dc2minor(di, ch);
2079 #ifdef ISDN_DEBUG_MODEM_ICALL
2080 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2081 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2082 info->flags, info->isdn_driver, info->isdn_channel,
2083 dev->usage[idx]);
2084 #endif
2085 if (
2086 #ifndef FIX_FILE_TRANSFER
2087 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2088 #endif
2089 (info->isdn_driver == -1) &&
2090 (info->isdn_channel == -1) &&
2091 (USG_NONE(dev->usage[idx]))) {
2092 int matchret;
2093
2094 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2095 wret = matchret;
2096 if (!matchret) { /* EAZ is matching */
2097 info->isdn_driver = di;
2098 info->isdn_channel = ch;
2099 info->drv_index = idx;
2100 dev->m_idx[idx] = info->line;
2101 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2102 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2103 strcpy(dev->num[idx], nr);
2104 strcpy(info->emu.cpn, eaz);
2105 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2106 info->emu.mdmreg[REG_PLAN] = setup->plan;
2107 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2108 isdn_info_update();
2109 spin_unlock_irqrestore(&dev->lock, flags);
2110 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2111 info->line);
2112 info->msr |= UART_MSR_RI;
2113 isdn_tty_modem_result(RESULT_RING, info);
2114 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2115 return 1;
2116 }
2117 }
2118 }
2119 }
2120 spin_unlock_irqrestore(&dev->lock, flags);
2121 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2122 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2123 return (wret == 2)?3:0;
2124 }
2125
2126 #define TTY_IS_ACTIVE(info) \
2127 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2128
2129 int
isdn_tty_stat_callback(int i,isdn_ctrl * c)2130 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2131 {
2132 int mi;
2133 modem_info *info;
2134 char *e;
2135
2136 if (i < 0)
2137 return 0;
2138 if ((mi = dev->m_idx[i]) >= 0) {
2139 info = &dev->mdm.info[mi];
2140 switch (c->command) {
2141 case ISDN_STAT_CINF:
2142 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2143 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2144 if (e == (char *)c->parm.num)
2145 info->emu.charge = 0;
2146
2147 break;
2148 case ISDN_STAT_BSENT:
2149 #ifdef ISDN_TTY_STAT_DEBUG
2150 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2151 #endif
2152 if ((info->isdn_driver == c->driver) &&
2153 (info->isdn_channel == c->arg)) {
2154 info->msr |= UART_MSR_CTS;
2155 if (info->send_outstanding)
2156 if (!(--info->send_outstanding))
2157 info->lsr |= UART_LSR_TEMT;
2158 isdn_tty_tint(info);
2159 return 1;
2160 }
2161 break;
2162 case ISDN_STAT_CAUSE:
2163 #ifdef ISDN_TTY_STAT_DEBUG
2164 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2165 #endif
2166 /* Signal cause to tty-device */
2167 strncpy(info->last_cause, c->parm.num, 5);
2168 return 1;
2169 case ISDN_STAT_DISPLAY:
2170 #ifdef ISDN_TTY_STAT_DEBUG
2171 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2172 #endif
2173 /* Signal display to tty-device */
2174 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2175 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2176 isdn_tty_at_cout("\r\n", info);
2177 isdn_tty_at_cout("DISPLAY: ", info);
2178 isdn_tty_at_cout(c->parm.display, info);
2179 isdn_tty_at_cout("\r\n", info);
2180 }
2181 return 1;
2182 case ISDN_STAT_DCONN:
2183 #ifdef ISDN_TTY_STAT_DEBUG
2184 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2185 #endif
2186 if (TTY_IS_ACTIVE(info)) {
2187 if (info->dialing == 1) {
2188 info->dialing = 2;
2189 return 1;
2190 }
2191 }
2192 break;
2193 case ISDN_STAT_DHUP:
2194 #ifdef ISDN_TTY_STAT_DEBUG
2195 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2196 #endif
2197 if (TTY_IS_ACTIVE(info)) {
2198 if (info->dialing == 1)
2199 isdn_tty_modem_result(RESULT_BUSY, info);
2200 if (info->dialing > 1)
2201 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2202 info->dialing = 0;
2203 #ifdef ISDN_DEBUG_MODEM_HUP
2204 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2205 #endif
2206 isdn_tty_modem_hup(info, 0);
2207 return 1;
2208 }
2209 break;
2210 case ISDN_STAT_BCONN:
2211 #ifdef ISDN_TTY_STAT_DEBUG
2212 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2213 #endif
2214 /* Wake up any processes waiting
2215 * for incoming call of this device when
2216 * DCD follow the state of incoming carrier
2217 */
2218 if (info->blocked_open &&
2219 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2220 wake_up_interruptible(&info->open_wait);
2221 }
2222
2223 /* Schedule CONNECT-Message to any tty
2224 * waiting for it and
2225 * set DCD-bit of its modem-status.
2226 */
2227 if (TTY_IS_ACTIVE(info) ||
2228 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2229 info->msr |= UART_MSR_DCD;
2230 info->emu.charge = 0;
2231 if (info->dialing & 0xf)
2232 info->last_dir = 1;
2233 else
2234 info->last_dir = 0;
2235 info->dialing = 0;
2236 info->rcvsched = 1;
2237 if (USG_MODEM(dev->usage[i])) {
2238 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2239 strcpy(info->emu.connmsg, c->parm.num);
2240 isdn_tty_modem_result(RESULT_CONNECT, info);
2241 } else
2242 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2243 }
2244 if (USG_VOICE(dev->usage[i]))
2245 isdn_tty_modem_result(RESULT_VCON, info);
2246 return 1;
2247 }
2248 break;
2249 case ISDN_STAT_BHUP:
2250 #ifdef ISDN_TTY_STAT_DEBUG
2251 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2252 #endif
2253 if (TTY_IS_ACTIVE(info)) {
2254 #ifdef ISDN_DEBUG_MODEM_HUP
2255 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2256 #endif
2257 isdn_tty_modem_hup(info, 0);
2258 return 1;
2259 }
2260 break;
2261 case ISDN_STAT_NODCH:
2262 #ifdef ISDN_TTY_STAT_DEBUG
2263 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2264 #endif
2265 if (TTY_IS_ACTIVE(info)) {
2266 if (info->dialing) {
2267 info->dialing = 0;
2268 info->last_l2 = -1;
2269 info->last_si = 0;
2270 sprintf(info->last_cause, "0000");
2271 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2272 }
2273 isdn_tty_modem_hup(info, 0);
2274 return 1;
2275 }
2276 break;
2277 case ISDN_STAT_UNLOAD:
2278 #ifdef ISDN_TTY_STAT_DEBUG
2279 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2280 #endif
2281 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2282 info = &dev->mdm.info[i];
2283 if (info->isdn_driver == c->driver) {
2284 if (info->online)
2285 isdn_tty_modem_hup(info, 1);
2286 }
2287 }
2288 return 1;
2289 #ifdef CONFIG_ISDN_TTY_FAX
2290 case ISDN_STAT_FAXIND:
2291 if (TTY_IS_ACTIVE(info)) {
2292 isdn_tty_fax_command(info, c);
2293 }
2294 break;
2295 #endif
2296 #ifdef CONFIG_ISDN_AUDIO
2297 case ISDN_STAT_AUDIO:
2298 if (TTY_IS_ACTIVE(info)) {
2299 switch(c->parm.num[0]) {
2300 case ISDN_AUDIO_DTMF:
2301 if (info->vonline) {
2302 isdn_audio_put_dle_code(info,
2303 c->parm.num[1]);
2304 }
2305 break;
2306 }
2307 }
2308 break;
2309 #endif
2310 }
2311 }
2312 return 0;
2313 }
2314
2315 /*********************************************************************
2316 Modem-Emulator-Routines
2317 *********************************************************************/
2318
2319 #define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2320
2321 /*
2322 * Put a message from the AT-emulator into receive-buffer of tty,
2323 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2324 */
2325 void
isdn_tty_at_cout(char * msg,modem_info * info)2326 isdn_tty_at_cout(char *msg, modem_info * info)
2327 {
2328 struct tty_struct *tty;
2329 atemu *m = &info->emu;
2330 char *p;
2331 char c;
2332 u_long flags;
2333 struct sk_buff *skb = NULL;
2334 char *sp = NULL;
2335 int l;
2336
2337 if (!msg) {
2338 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2339 return;
2340 }
2341
2342 l = strlen(msg);
2343
2344 spin_lock_irqsave(&info->readlock, flags);
2345 tty = info->tty;
2346 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2347 spin_unlock_irqrestore(&info->readlock, flags);
2348 return;
2349 }
2350
2351 /* use queue instead of direct, if online and */
2352 /* data is in queue or buffer is full */
2353 if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2354 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2355 skb = alloc_skb(l, GFP_ATOMIC);
2356 if (!skb) {
2357 spin_unlock_irqrestore(&info->readlock, flags);
2358 return;
2359 }
2360 sp = skb_put(skb, l);
2361 #ifdef CONFIG_ISDN_AUDIO
2362 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2363 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2364 #endif
2365 }
2366
2367 for (p = msg; *p; p++) {
2368 switch (*p) {
2369 case '\r':
2370 c = m->mdmreg[REG_CR];
2371 break;
2372 case '\n':
2373 c = m->mdmreg[REG_LF];
2374 break;
2375 case '\b':
2376 c = m->mdmreg[REG_BS];
2377 break;
2378 default:
2379 c = *p;
2380 }
2381 if (skb) {
2382 *sp++ = c;
2383 } else {
2384 if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
2385 break;
2386 }
2387 }
2388 if (skb) {
2389 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2390 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2391 spin_unlock_irqrestore(&info->readlock, flags);
2392 /* Schedule dequeuing */
2393 if (dev->modempoll && info->rcvsched)
2394 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2395
2396 } else {
2397 spin_unlock_irqrestore(&info->readlock, flags);
2398 tty_flip_buffer_push(tty);
2399 }
2400 }
2401
2402 /*
2403 * Perform ATH Hangup
2404 */
2405 static void
isdn_tty_on_hook(modem_info * info)2406 isdn_tty_on_hook(modem_info * info)
2407 {
2408 if (info->isdn_channel >= 0) {
2409 #ifdef ISDN_DEBUG_MODEM_HUP
2410 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2411 #endif
2412 isdn_tty_modem_hup(info, 1);
2413 }
2414 }
2415
2416 static void
isdn_tty_off_hook(void)2417 isdn_tty_off_hook(void)
2418 {
2419 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2420 }
2421
2422 #define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
2423 #define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
2424
2425 /*
2426 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2427 * isdn_tty_modem_escape() if sequence found.
2428 *
2429 * Parameters:
2430 * p pointer to databuffer
2431 * plus escape-character
2432 * count length of buffer
2433 * pluscount count of valid escape-characters so far
2434 * lastplus timestamp of last character
2435 */
2436 static void
isdn_tty_check_esc(const u_char * p,u_char plus,int count,int * pluscount,u_long * lastplus)2437 isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2438 u_long *lastplus)
2439 {
2440 if (plus > 127)
2441 return;
2442 if (count > 3) {
2443 p += count - 3;
2444 count = 3;
2445 *pluscount = 0;
2446 }
2447 while (count > 0) {
2448 if (*(p++) == plus) {
2449 if ((*pluscount)++) {
2450 /* Time since last '+' > 0.5 sec. ? */
2451 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2452 *pluscount = 1;
2453 } else {
2454 /* Time since last non-'+' < 1.5 sec. ? */
2455 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2456 *pluscount = 0;
2457 }
2458 if ((*pluscount == 3) && (count == 1))
2459 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2460 if (*pluscount > 3)
2461 *pluscount = 1;
2462 } else
2463 *pluscount = 0;
2464 *lastplus = jiffies;
2465 count--;
2466 }
2467 }
2468
2469 /*
2470 * Return result of AT-emulator to tty-receive-buffer, depending on
2471 * modem-register 12, bit 0 and 1.
2472 * For CONNECT-messages also switch to online-mode.
2473 * For RING-message handle auto-ATA if register 0 != 0
2474 */
2475
2476 static void
isdn_tty_modem_result(int code,modem_info * info)2477 isdn_tty_modem_result(int code, modem_info * info)
2478 {
2479 atemu *m = &info->emu;
2480 static char *msg[] =
2481 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2482 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2483 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2484 char s[ISDN_MSNLEN+10];
2485
2486 switch (code) {
2487 case RESULT_RING:
2488 m->mdmreg[REG_RINGCNT]++;
2489 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2490 /* Automatically accept incoming call */
2491 isdn_tty_cmd_ATA(info);
2492 break;
2493 case RESULT_NO_CARRIER:
2494 #ifdef ISDN_DEBUG_MODEM_HUP
2495 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2496 (info->flags & ISDN_ASYNC_CLOSING),
2497 (!info->tty));
2498 #endif
2499 m->mdmreg[REG_RINGCNT] = 0;
2500 del_timer(&info->nc_timer);
2501 info->ncarrier = 0;
2502 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2503 return;
2504 }
2505 #ifdef CONFIG_ISDN_AUDIO
2506 if (info->vonline & 1) {
2507 #ifdef ISDN_DEBUG_MODEM_VOICE
2508 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2509 info->line);
2510 #endif
2511 /* voice-recording, add DLE-ETX */
2512 isdn_tty_at_cout("\020\003", info);
2513 }
2514 if (info->vonline & 2) {
2515 #ifdef ISDN_DEBUG_MODEM_VOICE
2516 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2517 info->line);
2518 #endif
2519 /* voice-playing, add DLE-DC4 */
2520 isdn_tty_at_cout("\020\024", info);
2521 }
2522 #endif
2523 break;
2524 case RESULT_CONNECT:
2525 case RESULT_CONNECT64000:
2526 sprintf(info->last_cause, "0000");
2527 if (!info->online)
2528 info->online = 2;
2529 break;
2530 case RESULT_VCON:
2531 #ifdef ISDN_DEBUG_MODEM_VOICE
2532 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2533 info->line);
2534 #endif
2535 sprintf(info->last_cause, "0000");
2536 if (!info->online)
2537 info->online = 1;
2538 break;
2539 } /* switch(code) */
2540
2541 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2542 /* Show results */
2543 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2544 /* Show numeric results only */
2545 sprintf(s, "\r\n%d\r\n", code);
2546 isdn_tty_at_cout(s, info);
2547 } else {
2548 if (code == RESULT_RING) {
2549 /* return if "show RUNG" and ringcounter>1 */
2550 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2551 (m->mdmreg[REG_RINGCNT] > 1))
2552 return;
2553 /* print CID, _before_ _every_ ring */
2554 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2555 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2556 isdn_tty_at_cout(dev->num[info->drv_index], info);
2557 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2558 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2559 isdn_tty_at_cout(info->emu.cpn, info);
2560 }
2561 }
2562 }
2563 isdn_tty_at_cout("\r\n", info);
2564 isdn_tty_at_cout(msg[code], info);
2565 switch (code) {
2566 case RESULT_CONNECT:
2567 switch (m->mdmreg[REG_L2PROT]) {
2568 case ISDN_PROTO_L2_MODEM:
2569 isdn_tty_at_cout(" ", info);
2570 isdn_tty_at_cout(m->connmsg, info);
2571 break;
2572 }
2573 break;
2574 case RESULT_RING:
2575 /* Append CPN, if enabled */
2576 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2577 sprintf(s, "/%s", m->cpn);
2578 isdn_tty_at_cout(s, info);
2579 }
2580 /* Print CID only once, _after_ 1st RING */
2581 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2582 (m->mdmreg[REG_RINGCNT] == 1)) {
2583 isdn_tty_at_cout("\r\n", info);
2584 isdn_tty_at_cout("CALLER NUMBER: ", info);
2585 isdn_tty_at_cout(dev->num[info->drv_index], info);
2586 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2587 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2588 isdn_tty_at_cout(info->emu.cpn, info);
2589 }
2590 }
2591 break;
2592 case RESULT_NO_CARRIER:
2593 case RESULT_NO_DIALTONE:
2594 case RESULT_BUSY:
2595 case RESULT_NO_ANSWER:
2596 m->mdmreg[REG_RINGCNT] = 0;
2597 /* Append Cause-Message if enabled */
2598 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2599 sprintf(s, "/%s", info->last_cause);
2600 isdn_tty_at_cout(s, info);
2601 }
2602 break;
2603 case RESULT_CONNECT64000:
2604 /* Append Protocol to CONNECT message */
2605 switch (m->mdmreg[REG_L2PROT]) {
2606 case ISDN_PROTO_L2_X75I:
2607 case ISDN_PROTO_L2_X75UI:
2608 case ISDN_PROTO_L2_X75BUI:
2609 isdn_tty_at_cout("/X.75", info);
2610 break;
2611 case ISDN_PROTO_L2_HDLC:
2612 isdn_tty_at_cout("/HDLC", info);
2613 break;
2614 case ISDN_PROTO_L2_V11096:
2615 isdn_tty_at_cout("/V110/9600", info);
2616 break;
2617 case ISDN_PROTO_L2_V11019:
2618 isdn_tty_at_cout("/V110/19200", info);
2619 break;
2620 case ISDN_PROTO_L2_V11038:
2621 isdn_tty_at_cout("/V110/38400", info);
2622 break;
2623 }
2624 if (m->mdmreg[REG_T70] & BIT_T70) {
2625 isdn_tty_at_cout("/T.70", info);
2626 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2627 isdn_tty_at_cout("+", info);
2628 }
2629 break;
2630 }
2631 isdn_tty_at_cout("\r\n", info);
2632 }
2633 }
2634 if (code == RESULT_NO_CARRIER) {
2635 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2636 return;
2637 }
2638 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2639 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2640 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2641 tty_hangup(info->tty);
2642 }
2643 }
2644 }
2645
2646
2647 /*
2648 * Display a modem-register-value.
2649 */
2650 static void
isdn_tty_show_profile(int ridx,modem_info * info)2651 isdn_tty_show_profile(int ridx, modem_info * info)
2652 {
2653 char v[6];
2654
2655 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2656 isdn_tty_at_cout(v, info);
2657 }
2658
2659 /*
2660 * Get MSN-string from char-pointer, set pointer to end of number
2661 */
2662 static void
isdn_tty_get_msnstr(char * n,char ** p)2663 isdn_tty_get_msnstr(char *n, char **p)
2664 {
2665 int limit = ISDN_MSNLEN - 1;
2666
2667 while (((*p[0] >= '0' && *p[0] <= '9') ||
2668 /* Why a comma ??? */
2669 (*p[0] == ',') || (*p[0] == ':')) &&
2670 (limit--))
2671 *n++ = *p[0]++;
2672 *n = '\0';
2673 }
2674
2675 /*
2676 * Get phone-number from modem-commandbuffer
2677 */
2678 static void
isdn_tty_getdial(char * p,char * q,int cnt)2679 isdn_tty_getdial(char *p, char *q,int cnt)
2680 {
2681 int first = 1;
2682 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2683 buffer overflow */
2684
2685 while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) {
2686 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2687 ((*p == 'R') && first) ||
2688 (*p == '*') || (*p == '#')) {
2689 *q++ = *p;
2690 limit--;
2691 }
2692 if(!limit)
2693 break;
2694 p++;
2695 first = 0;
2696 }
2697 *q = 0;
2698 }
2699
2700 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2701 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2702
2703 static void
isdn_tty_report(modem_info * info)2704 isdn_tty_report(modem_info * info)
2705 {
2706 atemu *m = &info->emu;
2707 char s[80];
2708
2709 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2710 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2711 isdn_tty_at_cout(s, info);
2712 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2713 isdn_tty_at_cout(s, info);
2714 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2715 switch (info->last_l2) {
2716 case ISDN_PROTO_L2_X75I:
2717 isdn_tty_at_cout("X.75i", info);
2718 break;
2719 case ISDN_PROTO_L2_X75UI:
2720 isdn_tty_at_cout("X.75ui", info);
2721 break;
2722 case ISDN_PROTO_L2_X75BUI:
2723 isdn_tty_at_cout("X.75bui", info);
2724 break;
2725 case ISDN_PROTO_L2_HDLC:
2726 isdn_tty_at_cout("HDLC", info);
2727 break;
2728 case ISDN_PROTO_L2_V11096:
2729 isdn_tty_at_cout("V.110 9600 Baud", info);
2730 break;
2731 case ISDN_PROTO_L2_V11019:
2732 isdn_tty_at_cout("V.110 19200 Baud", info);
2733 break;
2734 case ISDN_PROTO_L2_V11038:
2735 isdn_tty_at_cout("V.110 38400 Baud", info);
2736 break;
2737 case ISDN_PROTO_L2_TRANS:
2738 isdn_tty_at_cout("transparent", info);
2739 break;
2740 case ISDN_PROTO_L2_MODEM:
2741 isdn_tty_at_cout("modem", info);
2742 break;
2743 case ISDN_PROTO_L2_FAX:
2744 isdn_tty_at_cout("fax", info);
2745 break;
2746 default:
2747 isdn_tty_at_cout("unknown", info);
2748 break;
2749 }
2750 if (m->mdmreg[REG_T70] & BIT_T70) {
2751 isdn_tty_at_cout("/T.70", info);
2752 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2753 isdn_tty_at_cout("+", info);
2754 }
2755 isdn_tty_at_cout("\r\n", info);
2756 isdn_tty_at_cout(" Service: ", info);
2757 switch (info->last_si) {
2758 case 1:
2759 isdn_tty_at_cout("audio\r\n", info);
2760 break;
2761 case 5:
2762 isdn_tty_at_cout("btx\r\n", info);
2763 break;
2764 case 7:
2765 isdn_tty_at_cout("data\r\n", info);
2766 break;
2767 default:
2768 sprintf(s, "%d\r\n", info->last_si);
2769 isdn_tty_at_cout(s, info);
2770 break;
2771 }
2772 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2773 isdn_tty_at_cout(s, info);
2774 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2775 isdn_tty_at_cout(s, info);
2776 }
2777
2778 /*
2779 * Parse AT&.. commands.
2780 */
2781 static int
isdn_tty_cmd_ATand(char ** p,modem_info * info)2782 isdn_tty_cmd_ATand(char **p, modem_info * info)
2783 {
2784 atemu *m = &info->emu;
2785 int i;
2786 char rb[100];
2787
2788 #define MAXRB (sizeof(rb) - 1)
2789
2790 switch (*p[0]) {
2791 case 'B':
2792 /* &B - Set Buffersize */
2793 p[0]++;
2794 i = isdn_getnum(p);
2795 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2796 PARSE_ERROR1;
2797 #ifdef CONFIG_ISDN_AUDIO
2798 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2799 PARSE_ERROR1;
2800 #endif
2801 m->mdmreg[REG_PSIZE] = i / 16;
2802 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2803 switch (m->mdmreg[REG_L2PROT]) {
2804 case ISDN_PROTO_L2_V11096:
2805 case ISDN_PROTO_L2_V11019:
2806 case ISDN_PROTO_L2_V11038:
2807 info->xmit_size /= 10;
2808 }
2809 break;
2810 case 'C':
2811 /* &C - DCD Status */
2812 p[0]++;
2813 switch (isdn_getnum(p)) {
2814 case 0:
2815 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2816 break;
2817 case 1:
2818 m->mdmreg[REG_DCD] |= BIT_DCD;
2819 break;
2820 default:
2821 PARSE_ERROR1
2822 }
2823 break;
2824 case 'D':
2825 /* &D - Set DTR-Low-behavior */
2826 p[0]++;
2827 switch (isdn_getnum(p)) {
2828 case 0:
2829 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2830 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2831 break;
2832 case 2:
2833 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2834 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2835 break;
2836 case 3:
2837 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2838 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2839 break;
2840 default:
2841 PARSE_ERROR1
2842 }
2843 break;
2844 case 'E':
2845 /* &E -Set EAZ/MSN */
2846 p[0]++;
2847 isdn_tty_get_msnstr(m->msn, p);
2848 break;
2849 case 'F':
2850 /* &F -Set Factory-Defaults */
2851 p[0]++;
2852 if (info->msr & UART_MSR_DCD)
2853 PARSE_ERROR1;
2854 isdn_tty_reset_profile(m);
2855 isdn_tty_modem_reset_regs(info, 1);
2856 break;
2857 #ifdef DUMMY_HAYES_AT
2858 case 'K':
2859 /* only for be compilant with common scripts */
2860 /* &K Flowcontrol - no function */
2861 p[0]++;
2862 isdn_getnum(p);
2863 break;
2864 #endif
2865 case 'L':
2866 /* &L -Set Numbers to listen on */
2867 p[0]++;
2868 i = 0;
2869 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2870 (i < ISDN_LMSNLEN - 1))
2871 m->lmsn[i++] = *p[0]++;
2872 m->lmsn[i] = '\0';
2873 break;
2874 case 'R':
2875 /* &R - Set V.110 bitrate adaption */
2876 p[0]++;
2877 i = isdn_getnum(p);
2878 switch (i) {
2879 case 0:
2880 /* Switch off V.110, back to X.75 */
2881 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2882 m->mdmreg[REG_SI2] = 0;
2883 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2884 break;
2885 case 9600:
2886 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2887 m->mdmreg[REG_SI2] = 197;
2888 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2889 break;
2890 case 19200:
2891 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2892 m->mdmreg[REG_SI2] = 199;
2893 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2894 break;
2895 case 38400:
2896 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2897 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2898 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2899 break;
2900 default:
2901 PARSE_ERROR1;
2902 }
2903 /* Switch off T.70 */
2904 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2905 /* Set Service 7 */
2906 m->mdmreg[REG_SI1] |= 4;
2907 break;
2908 case 'S':
2909 /* &S - Set Windowsize */
2910 p[0]++;
2911 i = isdn_getnum(p);
2912 if ((i > 0) && (i < 9))
2913 m->mdmreg[REG_WSIZE] = i;
2914 else
2915 PARSE_ERROR1;
2916 break;
2917 case 'V':
2918 /* &V - Show registers */
2919 p[0]++;
2920 isdn_tty_at_cout("\r\n", info);
2921 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2922 sprintf(rb, "S%02d=%03d%s", i,
2923 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2924 isdn_tty_at_cout(rb, info);
2925 }
2926 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2927 strlen(m->msn) ? m->msn : "None");
2928 isdn_tty_at_cout(rb, info);
2929 if (strlen(m->lmsn)) {
2930 isdn_tty_at_cout("\r\nListen: ", info);
2931 isdn_tty_at_cout(m->lmsn, info);
2932 isdn_tty_at_cout("\r\n", info);
2933 }
2934 break;
2935 case 'W':
2936 /* &W - Write Profile */
2937 p[0]++;
2938 switch (*p[0]) {
2939 case '0':
2940 p[0]++;
2941 modem_write_profile(m);
2942 break;
2943 default:
2944 PARSE_ERROR1;
2945 }
2946 break;
2947 case 'X':
2948 /* &X - Switch to BTX-Mode and T.70 */
2949 p[0]++;
2950 switch (isdn_getnum(p)) {
2951 case 0:
2952 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2953 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2954 break;
2955 case 1:
2956 m->mdmreg[REG_T70] |= BIT_T70;
2957 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2958 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2959 info->xmit_size = 112;
2960 m->mdmreg[REG_SI1] = 4;
2961 m->mdmreg[REG_SI2] = 0;
2962 break;
2963 case 2:
2964 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2965 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2966 info->xmit_size = 112;
2967 m->mdmreg[REG_SI1] = 4;
2968 m->mdmreg[REG_SI2] = 0;
2969 break;
2970 default:
2971 PARSE_ERROR1;
2972 }
2973 break;
2974 default:
2975 PARSE_ERROR1;
2976 }
2977 return 0;
2978 }
2979
2980 static int
isdn_tty_check_ats(int mreg,int mval,modem_info * info,atemu * m)2981 isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
2982 {
2983 /* Some plausibility checks */
2984 switch (mreg) {
2985 case REG_L2PROT:
2986 if (mval > ISDN_PROTO_L2_MAX)
2987 return 1;
2988 break;
2989 case REG_PSIZE:
2990 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2991 return 1;
2992 #ifdef CONFIG_ISDN_AUDIO
2993 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
2994 return 1;
2995 #endif
2996 info->xmit_size = mval * 16;
2997 switch (m->mdmreg[REG_L2PROT]) {
2998 case ISDN_PROTO_L2_V11096:
2999 case ISDN_PROTO_L2_V11019:
3000 case ISDN_PROTO_L2_V11038:
3001 info->xmit_size /= 10;
3002 }
3003 break;
3004 case REG_SI1I:
3005 case REG_PLAN:
3006 case REG_SCREEN:
3007 /* readonly registers */
3008 return 1;
3009 }
3010 return 0;
3011 }
3012
3013 /*
3014 * Perform ATS command
3015 */
3016 static int
isdn_tty_cmd_ATS(char ** p,modem_info * info)3017 isdn_tty_cmd_ATS(char **p, modem_info * info)
3018 {
3019 atemu *m = &info->emu;
3020 int bitpos;
3021 int mreg;
3022 int mval;
3023 int bval;
3024
3025 mreg = isdn_getnum(p);
3026 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3027 PARSE_ERROR1;
3028 switch (*p[0]) {
3029 case '=':
3030 p[0]++;
3031 mval = isdn_getnum(p);
3032 if (mval < 0 || mval > 255)
3033 PARSE_ERROR1;
3034 if (isdn_tty_check_ats(mreg, mval, info, m))
3035 PARSE_ERROR1;
3036 m->mdmreg[mreg] = mval;
3037 break;
3038 case '.':
3039 /* Set/Clear a single bit */
3040 p[0]++;
3041 bitpos = isdn_getnum(p);
3042 if ((bitpos < 0) || (bitpos > 7))
3043 PARSE_ERROR1;
3044 switch (*p[0]) {
3045 case '=':
3046 p[0]++;
3047 bval = isdn_getnum(p);
3048 if (bval < 0 || bval > 1)
3049 PARSE_ERROR1;
3050 if (bval)
3051 mval = m->mdmreg[mreg] | (1 << bitpos);
3052 else
3053 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3054 if (isdn_tty_check_ats(mreg, mval, info, m))
3055 PARSE_ERROR1;
3056 m->mdmreg[mreg] = mval;
3057 break;
3058 case '?':
3059 p[0]++;
3060 isdn_tty_at_cout("\r\n", info);
3061 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3062 info);
3063 break;
3064 default:
3065 PARSE_ERROR1;
3066 }
3067 break;
3068 case '?':
3069 p[0]++;
3070 isdn_tty_show_profile(mreg, info);
3071 break;
3072 default:
3073 PARSE_ERROR1;
3074 break;
3075 }
3076 return 0;
3077 }
3078
3079 /*
3080 * Perform ATA command
3081 */
3082 static void
isdn_tty_cmd_ATA(modem_info * info)3083 isdn_tty_cmd_ATA(modem_info * info)
3084 {
3085 atemu *m = &info->emu;
3086 isdn_ctrl cmd;
3087 int l2;
3088
3089 if (info->msr & UART_MSR_RI) {
3090 /* Accept incoming call */
3091 info->last_dir = 0;
3092 strcpy(info->last_num, dev->num[info->drv_index]);
3093 m->mdmreg[REG_RINGCNT] = 0;
3094 info->msr &= ~UART_MSR_RI;
3095 l2 = m->mdmreg[REG_L2PROT];
3096 #ifdef CONFIG_ISDN_AUDIO
3097 /* If more than one bit set in reg18, autoselect Layer2 */
3098 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3099 if (m->mdmreg[REG_SI1I] == 1) {
3100 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3101 l2 = ISDN_PROTO_L2_TRANS;
3102 } else
3103 l2 = ISDN_PROTO_L2_X75I;
3104 }
3105 #endif
3106 cmd.driver = info->isdn_driver;
3107 cmd.command = ISDN_CMD_SETL2;
3108 cmd.arg = info->isdn_channel + (l2 << 8);
3109 info->last_l2 = l2;
3110 isdn_command(&cmd);
3111 cmd.driver = info->isdn_driver;
3112 cmd.command = ISDN_CMD_SETL3;
3113 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3114 #ifdef CONFIG_ISDN_TTY_FAX
3115 if (l2 == ISDN_PROTO_L2_FAX) {
3116 cmd.parm.fax = info->fax;
3117 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3118 }
3119 #endif
3120 isdn_command(&cmd);
3121 cmd.driver = info->isdn_driver;
3122 cmd.arg = info->isdn_channel;
3123 cmd.command = ISDN_CMD_ACCEPTD;
3124 info->dialing = 16;
3125 info->emu.carrierwait = 0;
3126 isdn_command(&cmd);
3127 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3128 } else
3129 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3130 }
3131
3132 #ifdef CONFIG_ISDN_AUDIO
3133 /*
3134 * Parse AT+F.. commands
3135 */
3136 static int
isdn_tty_cmd_PLUSF(char ** p,modem_info * info)3137 isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3138 {
3139 atemu *m = &info->emu;
3140 char rs[20];
3141
3142 if (!strncmp(p[0], "CLASS", 5)) {
3143 p[0] += 5;
3144 switch (*p[0]) {
3145 case '?':
3146 p[0]++;
3147 sprintf(rs, "\r\n%d",
3148 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3149 #ifdef CONFIG_ISDN_TTY_FAX
3150 if (TTY_IS_FCLASS2(info))
3151 sprintf(rs, "\r\n2");
3152 else if (TTY_IS_FCLASS1(info))
3153 sprintf(rs, "\r\n1");
3154 #endif
3155 isdn_tty_at_cout(rs, info);
3156 break;
3157 case '=':
3158 p[0]++;
3159 switch (*p[0]) {
3160 case '0':
3161 p[0]++;
3162 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3163 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3164 m->mdmreg[REG_SI1] = 4;
3165 info->xmit_size =
3166 m->mdmreg[REG_PSIZE] * 16;
3167 break;
3168 #ifdef CONFIG_ISDN_TTY_FAX
3169 case '1':
3170 p[0]++;
3171 if (!(dev->global_features &
3172 ISDN_FEATURE_L3_FCLASS1))
3173 PARSE_ERROR1;
3174 m->mdmreg[REG_SI1] = 1;
3175 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3176 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3177 info->xmit_size =
3178 m->mdmreg[REG_PSIZE] * 16;
3179 break;
3180 case '2':
3181 p[0]++;
3182 if (!(dev->global_features &
3183 ISDN_FEATURE_L3_FCLASS2))
3184 PARSE_ERROR1;
3185 m->mdmreg[REG_SI1] = 1;
3186 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3187 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3188 info->xmit_size =
3189 m->mdmreg[REG_PSIZE] * 16;
3190 break;
3191 #endif
3192 case '8':
3193 p[0]++;
3194 /* L2 will change on dialout with si=1 */
3195 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3196 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3197 m->mdmreg[REG_SI1] = 5;
3198 info->xmit_size = VBUF;
3199 break;
3200 case '?':
3201 p[0]++;
3202 strcpy(rs, "\r\n0,");
3203 #ifdef CONFIG_ISDN_TTY_FAX
3204 if (dev->global_features &
3205 ISDN_FEATURE_L3_FCLASS1)
3206 strcat(rs, "1,");
3207 if (dev->global_features &
3208 ISDN_FEATURE_L3_FCLASS2)
3209 strcat(rs, "2,");
3210 #endif
3211 strcat(rs, "8");
3212 isdn_tty_at_cout(rs, info);
3213 break;
3214 default:
3215 PARSE_ERROR1;
3216 }
3217 break;
3218 default:
3219 PARSE_ERROR1;
3220 }
3221 return 0;
3222 }
3223 #ifdef CONFIG_ISDN_TTY_FAX
3224 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3225 #else
3226 PARSE_ERROR1;
3227 #endif
3228 }
3229
3230 /*
3231 * Parse AT+V.. commands
3232 */
3233 static int
isdn_tty_cmd_PLUSV(char ** p,modem_info * info)3234 isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3235 {
3236 atemu *m = &info->emu;
3237 isdn_ctrl cmd;
3238 static char *vcmd[] =
3239 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3240 int i;
3241 int par1;
3242 int par2;
3243 char rs[20];
3244
3245 i = 0;
3246 while (vcmd[i]) {
3247 if (!strncmp(vcmd[i], p[0], 2)) {
3248 p[0] += 2;
3249 break;
3250 }
3251 i++;
3252 }
3253 switch (i) {
3254 case 0:
3255 /* AT+VNH - Auto hangup feature */
3256 switch (*p[0]) {
3257 case '?':
3258 p[0]++;
3259 isdn_tty_at_cout("\r\n1", info);
3260 break;
3261 case '=':
3262 p[0]++;
3263 switch (*p[0]) {
3264 case '1':
3265 p[0]++;
3266 break;
3267 case '?':
3268 p[0]++;
3269 isdn_tty_at_cout("\r\n1", info);
3270 break;
3271 default:
3272 PARSE_ERROR1;
3273 }
3274 break;
3275 default:
3276 PARSE_ERROR1;
3277 }
3278 break;
3279 case 1:
3280 /* AT+VIP - Reset all voice parameters */
3281 isdn_tty_modem_reset_vpar(m);
3282 break;
3283 case 2:
3284 /* AT+VLS - Select device, accept incoming call */
3285 switch (*p[0]) {
3286 case '?':
3287 p[0]++;
3288 sprintf(rs, "\r\n%d", m->vpar[0]);
3289 isdn_tty_at_cout(rs, info);
3290 break;
3291 case '=':
3292 p[0]++;
3293 switch (*p[0]) {
3294 case '0':
3295 p[0]++;
3296 m->vpar[0] = 0;
3297 break;
3298 case '2':
3299 p[0]++;
3300 m->vpar[0] = 2;
3301 break;
3302 case '?':
3303 p[0]++;
3304 isdn_tty_at_cout("\r\n0,2", info);
3305 break;
3306 default:
3307 PARSE_ERROR1;
3308 }
3309 break;
3310 default:
3311 PARSE_ERROR1;
3312 }
3313 break;
3314 case 3:
3315 /* AT+VRX - Start recording */
3316 if (!m->vpar[0])
3317 PARSE_ERROR1;
3318 if (info->online != 1) {
3319 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3320 return 1;
3321 }
3322 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3323 if (!info->dtmf_state) {
3324 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3325 PARSE_ERROR1;
3326 }
3327 info->silence_state = isdn_audio_silence_init(info->silence_state);
3328 if (!info->silence_state) {
3329 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3330 PARSE_ERROR1;
3331 }
3332 if (m->vpar[3] < 5) {
3333 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3334 if (!info->adpcmr) {
3335 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3336 PARSE_ERROR1;
3337 }
3338 }
3339 #ifdef ISDN_DEBUG_AT
3340 printk(KERN_DEBUG "AT: +VRX\n");
3341 #endif
3342 info->vonline |= 1;
3343 isdn_tty_modem_result(RESULT_CONNECT, info);
3344 return 0;
3345 break;
3346 case 4:
3347 /* AT+VSD - Silence detection */
3348 switch (*p[0]) {
3349 case '?':
3350 p[0]++;
3351 sprintf(rs, "\r\n<%d>,<%d>",
3352 m->vpar[1],
3353 m->vpar[2]);
3354 isdn_tty_at_cout(rs, info);
3355 break;
3356 case '=':
3357 p[0]++;
3358 if ((*p[0]>='0') && (*p[0]<='9')) {
3359 par1 = isdn_getnum(p);
3360 if ((par1 < 0) || (par1 > 31))
3361 PARSE_ERROR1;
3362 if (*p[0] != ',')
3363 PARSE_ERROR1;
3364 p[0]++;
3365 par2 = isdn_getnum(p);
3366 if ((par2 < 0) || (par2 > 255))
3367 PARSE_ERROR1;
3368 m->vpar[1] = par1;
3369 m->vpar[2] = par2;
3370 break;
3371 } else
3372 if (*p[0] == '?') {
3373 p[0]++;
3374 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3375 info);
3376 break;
3377 } else
3378 PARSE_ERROR1;
3379 break;
3380 default:
3381 PARSE_ERROR1;
3382 }
3383 break;
3384 case 5:
3385 /* AT+VSM - Select compression */
3386 switch (*p[0]) {
3387 case '?':
3388 p[0]++;
3389 sprintf(rs, "\r\n<%d>,<%d><8000>",
3390 m->vpar[3],
3391 m->vpar[1]);
3392 isdn_tty_at_cout(rs, info);
3393 break;
3394 case '=':
3395 p[0]++;
3396 switch (*p[0]) {
3397 case '2':
3398 case '3':
3399 case '4':
3400 case '5':
3401 case '6':
3402 par1 = isdn_getnum(p);
3403 if ((par1 < 2) || (par1 > 6))
3404 PARSE_ERROR1;
3405 m->vpar[3] = par1;
3406 break;
3407 case '?':
3408 p[0]++;
3409 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3410 info);
3411 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3412 info);
3413 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3414 info);
3415 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3416 info);
3417 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3418 info);
3419 break;
3420 default:
3421 PARSE_ERROR1;
3422 }
3423 break;
3424 default:
3425 PARSE_ERROR1;
3426 }
3427 break;
3428 case 6:
3429 /* AT+VTX - Start sending */
3430 if (!m->vpar[0])
3431 PARSE_ERROR1;
3432 if (info->online != 1) {
3433 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3434 return 1;
3435 }
3436 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3437 if (!info->dtmf_state) {
3438 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3439 PARSE_ERROR1;
3440 }
3441 if (m->vpar[3] < 5) {
3442 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3443 if (!info->adpcms) {
3444 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3445 PARSE_ERROR1;
3446 }
3447 }
3448 #ifdef ISDN_DEBUG_AT
3449 printk(KERN_DEBUG "AT: +VTX\n");
3450 #endif
3451 m->lastDLE = 0;
3452 info->vonline |= 2;
3453 isdn_tty_modem_result(RESULT_CONNECT, info);
3454 return 0;
3455 break;
3456 case 7:
3457 /* AT+VDD - DTMF detection */
3458 switch (*p[0]) {
3459 case '?':
3460 p[0]++;
3461 sprintf(rs, "\r\n<%d>,<%d>",
3462 m->vpar[4],
3463 m->vpar[5]);
3464 isdn_tty_at_cout(rs, info);
3465 break;
3466 case '=':
3467 p[0]++;
3468 if ((*p[0]>='0') && (*p[0]<='9')) {
3469 if (info->online != 1)
3470 PARSE_ERROR1;
3471 par1 = isdn_getnum(p);
3472 if ((par1 < 0) || (par1 > 15))
3473 PARSE_ERROR1;
3474 if (*p[0] != ',')
3475 PARSE_ERROR1;
3476 p[0]++;
3477 par2 = isdn_getnum(p);
3478 if ((par2 < 0) || (par2 > 255))
3479 PARSE_ERROR1;
3480 m->vpar[4] = par1;
3481 m->vpar[5] = par2;
3482 cmd.driver = info->isdn_driver;
3483 cmd.command = ISDN_CMD_AUDIO;
3484 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3485 cmd.parm.num[0] = par1;
3486 cmd.parm.num[1] = par2;
3487 isdn_command(&cmd);
3488 break;
3489 } else
3490 if (*p[0] == '?') {
3491 p[0]++;
3492 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3493 info);
3494 break;
3495 } else
3496 PARSE_ERROR1;
3497 break;
3498 default:
3499 PARSE_ERROR1;
3500 }
3501 break;
3502 default:
3503 PARSE_ERROR1;
3504 }
3505 return 0;
3506 }
3507 #endif /* CONFIG_ISDN_AUDIO */
3508
3509 /*
3510 * Parse and perform an AT-command-line.
3511 */
3512 static void
isdn_tty_parse_at(modem_info * info)3513 isdn_tty_parse_at(modem_info * info)
3514 {
3515 atemu *m = &info->emu;
3516 char *p;
3517 char ds[ISDN_MSNLEN];
3518
3519 #ifdef ISDN_DEBUG_AT
3520 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3521 #endif
3522 for (p = &m->mdmcmd[2]; *p;) {
3523 switch (*p) {
3524 case ' ':
3525 p++;
3526 break;
3527 case 'A':
3528 /* A - Accept incoming call */
3529 p++;
3530 isdn_tty_cmd_ATA(info);
3531 return;
3532 break;
3533 case 'D':
3534 /* D - Dial */
3535 if (info->msr & UART_MSR_DCD)
3536 PARSE_ERROR;
3537 if (info->msr & UART_MSR_RI) {
3538 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3539 return;
3540 }
3541 isdn_tty_getdial(++p, ds, sizeof ds);
3542 p += strlen(p);
3543 if (!strlen(m->msn))
3544 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3545 else if (strlen(ds))
3546 isdn_tty_dial(ds, info, m);
3547 else
3548 PARSE_ERROR;
3549 return;
3550 case 'E':
3551 /* E - Turn Echo on/off */
3552 p++;
3553 switch (isdn_getnum(&p)) {
3554 case 0:
3555 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3556 break;
3557 case 1:
3558 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3559 break;
3560 default:
3561 PARSE_ERROR;
3562 }
3563 break;
3564 case 'H':
3565 /* H - On/Off-hook */
3566 p++;
3567 switch (*p) {
3568 case '0':
3569 p++;
3570 isdn_tty_on_hook(info);
3571 break;
3572 case '1':
3573 p++;
3574 isdn_tty_off_hook();
3575 break;
3576 default:
3577 isdn_tty_on_hook(info);
3578 break;
3579 }
3580 break;
3581 case 'I':
3582 /* I - Information */
3583 p++;
3584 isdn_tty_at_cout("\r\nLinux ISDN", info);
3585 switch (*p) {
3586 case '0':
3587 case '1':
3588 p++;
3589 break;
3590 case '2':
3591 p++;
3592 isdn_tty_report(info);
3593 break;
3594 case '3':
3595 p++;
3596 snprintf(ds, sizeof(ds), "\r\n%d", info->emu.charge);
3597 isdn_tty_at_cout(ds, info);
3598 break;
3599 default:;
3600 }
3601 break;
3602 #ifdef DUMMY_HAYES_AT
3603 case 'L':
3604 case 'M':
3605 /* only for be compilant with common scripts */
3606 /* no function */
3607 p++;
3608 isdn_getnum(&p);
3609 break;
3610 #endif
3611 case 'O':
3612 /* O - Go online */
3613 p++;
3614 if (info->msr & UART_MSR_DCD)
3615 /* if B-Channel is up */
3616 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3617 else
3618 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3619 return;
3620 case 'Q':
3621 /* Q - Turn Emulator messages on/off */
3622 p++;
3623 switch (isdn_getnum(&p)) {
3624 case 0:
3625 m->mdmreg[REG_RESP] |= BIT_RESP;
3626 break;
3627 case 1:
3628 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3629 break;
3630 default:
3631 PARSE_ERROR;
3632 }
3633 break;
3634 case 'S':
3635 /* S - Set/Get Register */
3636 p++;
3637 if (isdn_tty_cmd_ATS(&p, info))
3638 return;
3639 break;
3640 case 'V':
3641 /* V - Numeric or ASCII Emulator-messages */
3642 p++;
3643 switch (isdn_getnum(&p)) {
3644 case 0:
3645 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3646 break;
3647 case 1:
3648 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3649 break;
3650 default:
3651 PARSE_ERROR;
3652 }
3653 break;
3654 case 'Z':
3655 /* Z - Load Registers from Profile */
3656 p++;
3657 if (info->msr & UART_MSR_DCD) {
3658 info->online = 0;
3659 isdn_tty_on_hook(info);
3660 }
3661 isdn_tty_modem_reset_regs(info, 1);
3662 break;
3663 case '+':
3664 p++;
3665 switch (*p) {
3666 #ifdef CONFIG_ISDN_AUDIO
3667 case 'F':
3668 p++;
3669 if (isdn_tty_cmd_PLUSF(&p, info))
3670 return;
3671 break;
3672 case 'V':
3673 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3674 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3675 PARSE_ERROR;
3676 p++;
3677 if (isdn_tty_cmd_PLUSV(&p, info))
3678 return;
3679 break;
3680 #endif /* CONFIG_ISDN_AUDIO */
3681 case 'S': /* SUSPEND */
3682 p++;
3683 isdn_tty_get_msnstr(ds, &p);
3684 isdn_tty_suspend(ds, info, m);
3685 break;
3686 case 'R': /* RESUME */
3687 p++;
3688 isdn_tty_get_msnstr(ds, &p);
3689 isdn_tty_resume(ds, info, m);
3690 break;
3691 case 'M': /* MESSAGE */
3692 p++;
3693 isdn_tty_send_msg(info, m, p);
3694 break;
3695 default:
3696 PARSE_ERROR;
3697 }
3698 break;
3699 case '&':
3700 p++;
3701 if (isdn_tty_cmd_ATand(&p, info))
3702 return;
3703 break;
3704 default:
3705 PARSE_ERROR;
3706 }
3707 }
3708 #ifdef CONFIG_ISDN_AUDIO
3709 if (!info->vonline)
3710 #endif
3711 isdn_tty_modem_result(RESULT_OK, info);
3712 }
3713
3714 /* Need own toupper() because standard-toupper is not available
3715 * within modules.
3716 */
3717 #define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3718
3719 /*
3720 * Perform line-editing of AT-commands
3721 *
3722 * Parameters:
3723 * p inputbuffer
3724 * count length of buffer
3725 * channel index to line (minor-device)
3726 */
3727 static int
isdn_tty_edit_at(const char * p,int count,modem_info * info)3728 isdn_tty_edit_at(const char *p, int count, modem_info * info)
3729 {
3730 atemu *m = &info->emu;
3731 int total = 0;
3732 u_char c;
3733 char eb[2];
3734 int cnt;
3735
3736 for (cnt = count; cnt > 0; p++, cnt--) {
3737 c = *p;
3738 total++;
3739 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3740 /* Separator (CR or LF) */
3741 m->mdmcmd[m->mdmcmdl] = 0;
3742 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3743 eb[0] = c;
3744 eb[1] = 0;
3745 isdn_tty_at_cout(eb, info);
3746 }
3747 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3748 isdn_tty_parse_at(info);
3749 m->mdmcmdl = 0;
3750 continue;
3751 }
3752 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3753 /* Backspace-Function */
3754 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3755 if (m->mdmcmdl)
3756 m->mdmcmdl--;
3757 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3758 isdn_tty_at_cout("\b", info);
3759 }
3760 continue;
3761 }
3762 if (cmdchar(c)) {
3763 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3764 eb[0] = c;
3765 eb[1] = 0;
3766 isdn_tty_at_cout(eb, info);
3767 }
3768 if (m->mdmcmdl < 255) {
3769 c = my_toupper(c);
3770 switch (m->mdmcmdl) {
3771 case 1:
3772 if (c == 'T') {
3773 m->mdmcmd[m->mdmcmdl] = c;
3774 m->mdmcmd[++m->mdmcmdl] = 0;
3775 break;
3776 } else
3777 m->mdmcmdl = 0;
3778 /* Fall through, check for 'A' */
3779 case 0:
3780 if (c == 'A') {
3781 m->mdmcmd[m->mdmcmdl] = c;
3782 m->mdmcmd[++m->mdmcmdl] = 0;
3783 }
3784 break;
3785 default:
3786 m->mdmcmd[m->mdmcmdl] = c;
3787 m->mdmcmd[++m->mdmcmdl] = 0;
3788 }
3789 }
3790 }
3791 }
3792 return total;
3793 }
3794
3795 /*
3796 * Switch all modem-channels who are online and got a valid
3797 * escape-sequence 1.5 seconds ago, to command-mode.
3798 * This function is called every second via timer-interrupt from within
3799 * timer-dispatcher isdn_timer_function()
3800 */
3801 void
isdn_tty_modem_escape(void)3802 isdn_tty_modem_escape(void)
3803 {
3804 int ton = 0;
3805 int i;
3806 int midx;
3807
3808 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3809 if (USG_MODEM(dev->usage[i]))
3810 if ((midx = dev->m_idx[i]) >= 0) {
3811 modem_info *info = &dev->mdm.info[midx];
3812 if (info->online) {
3813 ton = 1;
3814 if ((info->emu.pluscount == 3) &&
3815 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3816 info->emu.pluscount = 0;
3817 info->online = 0;
3818 isdn_tty_modem_result(RESULT_OK, info);
3819 }
3820 }
3821 }
3822 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3823 }
3824
3825 /*
3826 * Put a RING-message to all modem-channels who have the RI-bit set.
3827 * This function is called every second via timer-interrupt from within
3828 * timer-dispatcher isdn_timer_function()
3829 */
3830 void
isdn_tty_modem_ring(void)3831 isdn_tty_modem_ring(void)
3832 {
3833 int ton = 0;
3834 int i;
3835
3836 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3837 modem_info *info = &dev->mdm.info[i];
3838 if (info->msr & UART_MSR_RI) {
3839 ton = 1;
3840 isdn_tty_modem_result(RESULT_RING, info);
3841 }
3842 }
3843 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3844 }
3845
3846 /*
3847 * For all online tty's, try sending data to
3848 * the lower levels.
3849 */
3850 void
isdn_tty_modem_xmit(void)3851 isdn_tty_modem_xmit(void)
3852 {
3853 int ton = 1;
3854 int i;
3855
3856 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3857 modem_info *info = &dev->mdm.info[i];
3858 if (info->online) {
3859 ton = 1;
3860 isdn_tty_senddown(info);
3861 isdn_tty_tint(info);
3862 }
3863 }
3864 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3865 }
3866
3867 /*
3868 * Check all channels if we have a 'no carrier' timeout.
3869 * Timeout value is set by Register S7.
3870 */
3871 void
isdn_tty_carrier_timeout(void)3872 isdn_tty_carrier_timeout(void)
3873 {
3874 int ton = 0;
3875 int i;
3876
3877 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3878 modem_info *info = &dev->mdm.info[i];
3879 if (info->dialing) {
3880 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3881 info->dialing = 0;
3882 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3883 isdn_tty_modem_hup(info, 1);
3884 }
3885 else
3886 ton = 1;
3887 }
3888 }
3889 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3890 }
3891