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