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[PATCH] ISDN: fix drivers, by handling errors thrown by ->readstat()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / isdn / i4l / isdn_common.c
blob69aee2602aa62aac22a3c6e41442a4d1810a7ee5
1 /* $Id: isdn_common.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
2 *
3 * Linux ISDN subsystem, common used functions (linklevel).
4 *
5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 Thinking Objects Software GmbH Wuerzburg
7 * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
8 *
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
11 *
12 */
13
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/poll.h>
17 #include <linux/vmalloc.h>
18 #include <linux/isdn.h>
19 #include <linux/smp_lock.h>
20 #include "isdn_common.h"
21 #include "isdn_tty.h"
22 #include "isdn_net.h"
23 #include "isdn_ppp.h"
24 #ifdef CONFIG_ISDN_AUDIO
25 #include "isdn_audio.h"
26 #endif
27 #ifdef CONFIG_ISDN_DIVERSION_MODULE
28 #define CONFIG_ISDN_DIVERSION
29 #endif
30 #ifdef CONFIG_ISDN_DIVERSION
31 #include <linux/isdn_divertif.h>
32 #endif /* CONFIG_ISDN_DIVERSION */
33 #include "isdn_v110.h"
34
35 /* Debugflags */
36 #undef ISDN_DEBUG_STATCALLB
37
38 MODULE_DESCRIPTION("ISDN4Linux: link layer");
39 MODULE_AUTHOR("Fritz Elfert");
40 MODULE_LICENSE("GPL");
41
42 isdn_dev *dev;
43
44 static char *isdn_revision = "$Revision: 1.1.2.3 $";
45
46 extern char *isdn_net_revision;
47 extern char *isdn_tty_revision;
48 #ifdef CONFIG_ISDN_PPP
49 extern char *isdn_ppp_revision;
50 #else
51 static char *isdn_ppp_revision = ": none $";
52 #endif
53 #ifdef CONFIG_ISDN_AUDIO
54 extern char *isdn_audio_revision;
55 #else
56 static char *isdn_audio_revision = ": none $";
57 #endif
58 extern char *isdn_v110_revision;
59
60 #ifdef CONFIG_ISDN_DIVERSION
61 static isdn_divert_if *divert_if; /* = NULL */
62 #endif /* CONFIG_ISDN_DIVERSION */
63
64
65 static int isdn_writebuf_stub(int, int, const u_char __user *, int);
66 static void set_global_features(void);
67 static int isdn_wildmat(char *s, char *p);
68 static int isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding);
69
70 static inline void
71 isdn_lock_driver(isdn_driver_t *drv)
72 {
73 try_module_get(drv->interface->owner);
74 drv->locks++;
75 }
76
77 void
78 isdn_lock_drivers(void)
79 {
80 int i;
81
82 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
83 if (!dev->drv[i])
84 continue;
85 isdn_lock_driver(dev->drv[i]);
86 }
87 }
88
89 static inline void
90 isdn_unlock_driver(isdn_driver_t *drv)
91 {
92 if (drv->locks > 0) {
93 drv->locks--;
94 module_put(drv->interface->owner);
95 }
96 }
97
98 void
99 isdn_unlock_drivers(void)
100 {
101 int i;
102
103 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
104 if (!dev->drv[i])
105 continue;
106 isdn_unlock_driver(dev->drv[i]);
107 }
108 }
109
110 #if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP)
111 void
112 isdn_dumppkt(char *s, u_char * p, int len, int dumplen)
113 {
114 int dumpc;
115
116 printk(KERN_DEBUG "%s(%d) ", s, len);
117 for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++)
118 printk(" %02x", *p++);
119 printk("\n");
120 }
121 #endif
122
123 /*
124 * I picked the pattern-matching-functions from an old GNU-tar version (1.10)
125 * It was originally written and put to PD by rs@mirror.TMC.COM (Rich Salz)
126 */
127 static int
128 isdn_star(char *s, char *p)
129 {
130 while (isdn_wildmat(s, p)) {
131 if (*++s == '\0')
132 return (2);
133 }
134 return (0);
135 }
136
137 /*
138 * Shell-type Pattern-matching for incoming caller-Ids
139 * This function gets a string in s and checks, if it matches the pattern
140 * given in p.
141 *
142 * Return:
143 * 0 = match.
144 * 1 = no match.
145 * 2 = no match. Would eventually match, if s would be longer.
146 *
147 * Possible Patterns:
148 *
149 * '?' matches one character
150 * '*' matches zero or more characters
151 * [xyz] matches the set of characters in brackets.
152 * [^xyz] matches any single character not in the set of characters
153 */
154
155 static int
156 isdn_wildmat(char *s, char *p)
157 {
158 register int last;
159 register int matched;
160 register int reverse;
161 register int nostar = 1;
162
163 if (!(*s) && !(*p))
164 return(1);
165 for (; *p; s++, p++)
166 switch (*p) {
167 case '\\':
168 /*
169 * Literal match with following character,
170 * fall through.
171 */
172 p++;
173 default:
174 if (*s != *p)
175 return (*s == '\0')?2:1;
176 continue;
177 case '?':
178 /* Match anything. */
179 if (*s == '\0')
180 return (2);
181 continue;
182 case '*':
183 nostar = 0;
184 /* Trailing star matches everything. */
185 return (*++p ? isdn_star(s, p) : 0);
186 case '[':
187 /* [^....] means inverse character class. */
188 if ((reverse = (p[1] == '^')))
189 p++;
190 for (last = 0, matched = 0; *++p && (*p != ']'); last = *p)
191 /* This next line requires a good C compiler. */
192 if (*p == '-' ? *s <= *++p && *s >= last : *s == *p)
193 matched = 1;
194 if (matched == reverse)
195 return (1);
196 continue;
197 }
198 return (*s == '\0')?0:nostar;
199 }
200
201 int isdn_msncmp( const char * msn1, const char * msn2 )
202 {
203 char TmpMsn1[ ISDN_MSNLEN ];
204 char TmpMsn2[ ISDN_MSNLEN ];
205 char *p;
206
207 for ( p = TmpMsn1; *msn1 && *msn1 != ':'; ) // Strip off a SPID
208 *p++ = *msn1++;
209 *p = '\0';
210
211 for ( p = TmpMsn2; *msn2 && *msn2 != ':'; ) // Strip off a SPID
212 *p++ = *msn2++;
213 *p = '\0';
214
215 return isdn_wildmat( TmpMsn1, TmpMsn2 );
216 }
217
218 int
219 isdn_dc2minor(int di, int ch)
220 {
221 int i;
222 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
223 if (dev->chanmap[i] == ch && dev->drvmap[i] == di)
224 return i;
225 return -1;
226 }
227
228 static int isdn_timer_cnt1 = 0;
229 static int isdn_timer_cnt2 = 0;
230 static int isdn_timer_cnt3 = 0;
231
232 static void
233 isdn_timer_funct(ulong dummy)
234 {
235 int tf = dev->tflags;
236 if (tf & ISDN_TIMER_FAST) {
237 if (tf & ISDN_TIMER_MODEMREAD)
238 isdn_tty_readmodem();
239 if (tf & ISDN_TIMER_MODEMPLUS)
240 isdn_tty_modem_escape();
241 if (tf & ISDN_TIMER_MODEMXMIT)
242 isdn_tty_modem_xmit();
243 }
244 if (tf & ISDN_TIMER_SLOW) {
245 if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) {
246 isdn_timer_cnt1 = 0;
247 if (tf & ISDN_TIMER_NETDIAL)
248 isdn_net_dial();
249 }
250 if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
251 isdn_timer_cnt2 = 0;
252 if (tf & ISDN_TIMER_NETHANGUP)
253 isdn_net_autohup();
254 if (++isdn_timer_cnt3 >= ISDN_TIMER_RINGING) {
255 isdn_timer_cnt3 = 0;
256 if (tf & ISDN_TIMER_MODEMRING)
257 isdn_tty_modem_ring();
258 }
259 if (tf & ISDN_TIMER_CARRIER)
260 isdn_tty_carrier_timeout();
261 }
262 }
263 if (tf)
264 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
265 }
266
267 void
268 isdn_timer_ctrl(int tf, int onoff)
269 {
270 unsigned long flags;
271 int old_tflags;
272
273 spin_lock_irqsave(&dev->timerlock, flags);
274 if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) {
275 /* If the slow-timer wasn't activated until now */
276 isdn_timer_cnt1 = 0;
277 isdn_timer_cnt2 = 0;
278 }
279 old_tflags = dev->tflags;
280 if (onoff)
281 dev->tflags |= tf;
282 else
283 dev->tflags &= ~tf;
284 if (dev->tflags && !old_tflags)
285 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
286 spin_unlock_irqrestore(&dev->timerlock, flags);
287 }
288
289 /*
290 * Receive a packet from B-Channel. (Called from low-level-module)
291 */
292 static void
293 isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb)
294 {
295 int i;
296
297 if ((i = isdn_dc2minor(di, channel)) == -1) {
298 dev_kfree_skb(skb);
299 return;
300 }
301 /* Update statistics */
302 dev->ibytes[i] += skb->len;
303
304 /* First, try to deliver data to network-device */
305 if (isdn_net_rcv_skb(i, skb))
306 return;
307
308 /* V.110 handling
309 * makes sense for async streams only, so it is
310 * called after possible net-device delivery.
311 */
312 if (dev->v110[i]) {
313 atomic_inc(&dev->v110use[i]);
314 skb = isdn_v110_decode(dev->v110[i], skb);
315 atomic_dec(&dev->v110use[i]);
316 if (!skb)
317 return;
318 }
319
320 /* No network-device found, deliver to tty or raw-channel */
321 if (skb->len) {
322 if (isdn_tty_rcv_skb(i, di, channel, skb))
323 return;
324 wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]);
325 } else
326 dev_kfree_skb(skb);
327 }
328
329 /*
330 * Intercept command from Linklevel to Lowlevel.
331 * If layer 2 protocol is V.110 and this is not supported by current
332 * lowlevel-driver, use driver's transparent mode and handle V.110 in
333 * linklevel instead.
334 */
335 int
336 isdn_command(isdn_ctrl *cmd)
337 {
338 if (cmd->driver == -1) {
339 printk(KERN_WARNING "isdn_command command(%x) driver -1\n", cmd->command);
340 return(1);
341 }
342 if (!dev->drv[cmd->driver]) {
343 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d] NULL\n",
344 cmd->command, cmd->driver);
345 return(1);
346 }
347 if (!dev->drv[cmd->driver]->interface) {
348 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d]->interface NULL\n",
349 cmd->command, cmd->driver);
350 return(1);
351 }
352 if (cmd->command == ISDN_CMD_SETL2) {
353 int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255);
354 unsigned long l2prot = (cmd->arg >> 8) & 255;
355 unsigned long features = (dev->drv[cmd->driver]->interface->features
356 >> ISDN_FEATURE_L2_SHIFT) &
357 ISDN_FEATURE_L2_MASK;
358 unsigned long l2_feature = (1 << l2prot);
359
360 switch (l2prot) {
361 case ISDN_PROTO_L2_V11096:
362 case ISDN_PROTO_L2_V11019:
363 case ISDN_PROTO_L2_V11038:
364 /* If V.110 requested, but not supported by
365 * HL-driver, set emulator-flag and change
366 * Layer-2 to transparent
367 */
368 if (!(features & l2_feature)) {
369 dev->v110emu[idx] = l2prot;
370 cmd->arg = (cmd->arg & 255) |
371 (ISDN_PROTO_L2_TRANS << 8);
372 } else
373 dev->v110emu[idx] = 0;
374 }
375 }
376 return dev->drv[cmd->driver]->interface->command(cmd);
377 }
378
379 void
380 isdn_all_eaz(int di, int ch)
381 {
382 isdn_ctrl cmd;
383
384 if (di < 0)
385 return;
386 cmd.driver = di;
387 cmd.arg = ch;
388 cmd.command = ISDN_CMD_SETEAZ;
389 cmd.parm.num[0] = '\0';
390 isdn_command(&cmd);
391 }
392
393 /*
394 * Begin of a CAPI like LL<->HL interface, currently used only for
395 * supplementary service (CAPI 2.0 part III)
396 */
397 #include <linux/isdn/capicmd.h>
398
399 static int
400 isdn_capi_rec_hl_msg(capi_msg *cm) {
401
402 int di;
403 int ch;
404
405 di = (cm->adr.Controller & 0x7f) -1;
406 ch = isdn_dc2minor(di, (cm->adr.Controller>>8)& 0x7f);
407 switch(cm->Command) {
408 case CAPI_FACILITY:
409 /* in the moment only handled in tty */
410 return(isdn_tty_capi_facility(cm));
411 default:
412 return(-1);
413 }
414 }
415
416 static int
417 isdn_status_callback(isdn_ctrl * c)
418 {
419 int di;
420 u_long flags;
421 int i;
422 int r;
423 int retval = 0;
424 isdn_ctrl cmd;
425 isdn_net_dev *p;
426
427 di = c->driver;
428 i = isdn_dc2minor(di, c->arg);
429 switch (c->command) {
430 case ISDN_STAT_BSENT:
431 if (i < 0)
432 return -1;
433 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
434 return 0;
435 if (isdn_net_stat_callback(i, c))
436 return 0;
437 if (isdn_v110_stat_callback(i, c))
438 return 0;
439 if (isdn_tty_stat_callback(i, c))
440 return 0;
441 wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
442 break;
443 case ISDN_STAT_STAVAIL:
444 dev->drv[di]->stavail += c->arg;
445 wake_up_interruptible(&dev->drv[di]->st_waitq);
446 break;
447 case ISDN_STAT_RUN:
448 dev->drv[di]->flags |= DRV_FLAG_RUNNING;
449 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
450 if (dev->drvmap[i] == di)
451 isdn_all_eaz(di, dev->chanmap[i]);
452 set_global_features();
453 break;
454 case ISDN_STAT_STOP:
455 dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
456 break;
457 case ISDN_STAT_ICALL:
458 if (i < 0)
459 return -1;
460 #ifdef ISDN_DEBUG_STATCALLB
461 printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
462 #endif
463 if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
464 cmd.driver = di;
465 cmd.arg = c->arg;
466 cmd.command = ISDN_CMD_HANGUP;
467 isdn_command(&cmd);
468 return 0;
469 }
470 /* Try to find a network-interface which will accept incoming call */
471 r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
472 switch (r) {
473 case 0:
474 /* No network-device replies.
475 * Try ttyI's.
476 * These return 0 on no match, 1 on match and
477 * 3 on eventually match, if CID is longer.
478 */
479 if (c->command == ISDN_STAT_ICALL)
480 if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return(retval);
481 #ifdef CONFIG_ISDN_DIVERSION
482 if (divert_if)
483 if ((retval = divert_if->stat_callback(c)))
484 return(retval); /* processed */
485 #endif /* CONFIG_ISDN_DIVERSION */
486 if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
487 /* No tty responding */
488 cmd.driver = di;
489 cmd.arg = c->arg;
490 cmd.command = ISDN_CMD_HANGUP;
491 isdn_command(&cmd);
492 retval = 2;
493 }
494 break;
495 case 1:
496 /* Schedule connection-setup */
497 isdn_net_dial();
498 cmd.driver = di;
499 cmd.arg = c->arg;
500 cmd.command = ISDN_CMD_ACCEPTD;
501 for ( p = dev->netdev; p; p = p->next )
502 if ( p->local->isdn_channel == cmd.arg )
503 {
504 strcpy( cmd.parm.setup.eazmsn, p->local->msn );
505 isdn_command(&cmd);
506 retval = 1;
507 break;
508 }
509 break;
510
511 case 2: /* For calling back, first reject incoming call ... */
512 case 3: /* Interface found, but down, reject call actively */
513 retval = 2;
514 printk(KERN_INFO "isdn: Rejecting Call\n");
515 cmd.driver = di;
516 cmd.arg = c->arg;
517 cmd.command = ISDN_CMD_HANGUP;
518 isdn_command(&cmd);
519 if (r == 3)
520 break;
521 /* Fall through */
522 case 4:
523 /* ... then start callback. */
524 isdn_net_dial();
525 break;
526 case 5:
527 /* Number would eventually match, if longer */
528 retval = 3;
529 break;
530 }
531 #ifdef ISDN_DEBUG_STATCALLB
532 printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
533 #endif
534 return retval;
535 break;
536 case ISDN_STAT_CINF:
537 if (i < 0)
538 return -1;
539 #ifdef ISDN_DEBUG_STATCALLB
540 printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
541 #endif
542 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
543 return 0;
544 if (strcmp(c->parm.num, "0"))
545 isdn_net_stat_callback(i, c);
546 isdn_tty_stat_callback(i, c);
547 break;
548 case ISDN_STAT_CAUSE:
549 #ifdef ISDN_DEBUG_STATCALLB
550 printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
551 #endif
552 printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
553 dev->drvid[di], c->arg, c->parm.num);
554 isdn_tty_stat_callback(i, c);
555 #ifdef CONFIG_ISDN_DIVERSION
556 if (divert_if)
557 divert_if->stat_callback(c);
558 #endif /* CONFIG_ISDN_DIVERSION */
559 break;
560 case ISDN_STAT_DISPLAY:
561 #ifdef ISDN_DEBUG_STATCALLB
562 printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
563 #endif
564 isdn_tty_stat_callback(i, c);
565 #ifdef CONFIG_ISDN_DIVERSION
566 if (divert_if)
567 divert_if->stat_callback(c);
568 #endif /* CONFIG_ISDN_DIVERSION */
569 break;
570 case ISDN_STAT_DCONN:
571 if (i < 0)
572 return -1;
573 #ifdef ISDN_DEBUG_STATCALLB
574 printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
575 #endif
576 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
577 return 0;
578 /* Find any net-device, waiting for D-channel setup */
579 if (isdn_net_stat_callback(i, c))
580 break;
581 isdn_v110_stat_callback(i, c);
582 /* Find any ttyI, waiting for D-channel setup */
583 if (isdn_tty_stat_callback(i, c)) {
584 cmd.driver = di;
585 cmd.arg = c->arg;
586 cmd.command = ISDN_CMD_ACCEPTB;
587 isdn_command(&cmd);
588 break;
589 }
590 break;
591 case ISDN_STAT_DHUP:
592 if (i < 0)
593 return -1;
594 #ifdef ISDN_DEBUG_STATCALLB
595 printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
596 #endif
597 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
598 return 0;
599 dev->drv[di]->online &= ~(1 << (c->arg));
600 isdn_info_update();
601 /* Signal hangup to network-devices */
602 if (isdn_net_stat_callback(i, c))
603 break;
604 isdn_v110_stat_callback(i, c);
605 if (isdn_tty_stat_callback(i, c))
606 break;
607 #ifdef CONFIG_ISDN_DIVERSION
608 if (divert_if)
609 divert_if->stat_callback(c);
610 #endif /* CONFIG_ISDN_DIVERSION */
611 break;
612 break;
613 case ISDN_STAT_BCONN:
614 if (i < 0)
615 return -1;
616 #ifdef ISDN_DEBUG_STATCALLB
617 printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
618 #endif
619 /* Signal B-channel-connect to network-devices */
620 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
621 return 0;
622 dev->drv[di]->online |= (1 << (c->arg));
623 isdn_info_update();
624 if (isdn_net_stat_callback(i, c))
625 break;
626 isdn_v110_stat_callback(i, c);
627 if (isdn_tty_stat_callback(i, c))
628 break;
629 break;
630 case ISDN_STAT_BHUP:
631 if (i < 0)
632 return -1;
633 #ifdef ISDN_DEBUG_STATCALLB
634 printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
635 #endif
636 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
637 return 0;
638 dev->drv[di]->online &= ~(1 << (c->arg));
639 isdn_info_update();
640 #ifdef CONFIG_ISDN_X25
641 /* Signal hangup to network-devices */
642 if (isdn_net_stat_callback(i, c))
643 break;
644 #endif
645 isdn_v110_stat_callback(i, c);
646 if (isdn_tty_stat_callback(i, c))
647 break;
648 break;
649 case ISDN_STAT_NODCH:
650 if (i < 0)
651 return -1;
652 #ifdef ISDN_DEBUG_STATCALLB
653 printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
654 #endif
655 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
656 return 0;
657 if (isdn_net_stat_callback(i, c))
658 break;
659 if (isdn_tty_stat_callback(i, c))
660 break;
661 break;
662 case ISDN_STAT_ADDCH:
663 spin_lock_irqsave(&dev->lock, flags);
664 if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) {
665 spin_unlock_irqrestore(&dev->lock, flags);
666 return -1;
667 }
668 spin_unlock_irqrestore(&dev->lock, flags);
669 isdn_info_update();
670 break;
671 case ISDN_STAT_DISCH:
672 spin_lock_irqsave(&dev->lock, flags);
673 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
674 if ((dev->drvmap[i] == di) &&
675 (dev->chanmap[i] == c->arg)) {
676 if (c->parm.num[0])
677 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
678 else
679 if (USG_NONE(dev->usage[i])) {
680 dev->usage[i] |= ISDN_USAGE_DISABLED;
681 }
682 else
683 retval = -1;
684 break;
685 }
686 spin_unlock_irqrestore(&dev->lock, flags);
687 isdn_info_update();
688 break;
689 case ISDN_STAT_UNLOAD:
690 while (dev->drv[di]->locks > 0) {
691 isdn_unlock_driver(dev->drv[di]);
692 }
693 spin_lock_irqsave(&dev->lock, flags);
694 isdn_tty_stat_callback(i, c);
695 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
696 if (dev->drvmap[i] == di) {
697 dev->drvmap[i] = -1;
698 dev->chanmap[i] = -1;
699 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
700 }
701 dev->drivers--;
702 dev->channels -= dev->drv[di]->channels;
703 kfree(dev->drv[di]->rcverr);
704 kfree(dev->drv[di]->rcvcount);
705 for (i = 0; i < dev->drv[di]->channels; i++)
706 skb_queue_purge(&dev->drv[di]->rpqueue[i]);
707 kfree(dev->drv[di]->rpqueue);
708 kfree(dev->drv[di]->rcv_waitq);
709 kfree(dev->drv[di]);
710 dev->drv[di] = NULL;
711 dev->drvid[di][0] = '\0';
712 isdn_info_update();
713 set_global_features();
714 spin_unlock_irqrestore(&dev->lock, flags);
715 return 0;
716 case ISDN_STAT_L1ERR:
717 break;
718 case CAPI_PUT_MESSAGE:
719 return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
720 #ifdef CONFIG_ISDN_TTY_FAX
721 case ISDN_STAT_FAXIND:
722 isdn_tty_stat_callback(i, c);
723 break;
724 #endif
725 #ifdef CONFIG_ISDN_AUDIO
726 case ISDN_STAT_AUDIO:
727 isdn_tty_stat_callback(i, c);
728 break;
729 #endif
730 #ifdef CONFIG_ISDN_DIVERSION
731 case ISDN_STAT_PROT:
732 case ISDN_STAT_REDIR:
733 if (divert_if)
734 return(divert_if->stat_callback(c));
735 #endif /* CONFIG_ISDN_DIVERSION */
736 default:
737 return -1;
738 }
739 return 0;
740 }
741
742 /*
743 * Get integer from char-pointer, set pointer to end of number
744 */
745 int
746 isdn_getnum(char **p)
747 {
748 int v = -1;
749
750 while (*p[0] >= '0' && *p[0] <= '9')
751 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
752 return v;
753 }
754
755 #define DLE 0x10
756
757 /*
758 * isdn_readbchan() tries to get data from the read-queue.
759 * It MUST be called with interrupts off.
760 *
761 * Be aware that this is not an atomic operation when sleep != 0, even though
762 * interrupts are turned off! Well, like that we are currently only called
763 * on behalf of a read system call on raw device files (which are documented
764 * to be dangerous and for for debugging purpose only). The inode semaphore
765 * takes care that this is not called for the same minor device number while
766 * we are sleeping, but access is not serialized against simultaneous read()
767 * from the corresponding ttyI device. Can other ugly events, like changes
768 * of the mapping (di,ch)<->minor, happen during the sleep? --he
769 */
770 int
771 isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_queue_head_t *sleep)
772 {
773 int count;
774 int count_pull;
775 int count_put;
776 int dflag;
777 struct sk_buff *skb;
778 u_char *cp;
779
780 if (!dev->drv[di])
781 return 0;
782 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
783 if (sleep)
784 interruptible_sleep_on(sleep);
785 else
786 return 0;
787 }
788 if (len > dev->drv[di]->rcvcount[channel])
789 len = dev->drv[di]->rcvcount[channel];
790 cp = buf;
791 count = 0;
792 while (len) {
793 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
794 break;
795 #ifdef CONFIG_ISDN_AUDIO
796 if (ISDN_AUDIO_SKB_LOCK(skb))
797 break;
798 ISDN_AUDIO_SKB_LOCK(skb) = 1;
799 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
800 char *p = skb->data;
801 unsigned long DLEmask = (1 << channel);
802
803 dflag = 0;
804 count_pull = count_put = 0;
805 while ((count_pull < skb->len) && (len > 0)) {
806 len--;
807 if (dev->drv[di]->DLEflag & DLEmask) {
808 *cp++ = DLE;
809 dev->drv[di]->DLEflag &= ~DLEmask;
810 } else {
811 *cp++ = *p;
812 if (*p == DLE) {
813 dev->drv[di]->DLEflag |= DLEmask;
814 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
815 }
816 p++;
817 count_pull++;
818 }
819 count_put++;
820 }
821 if (count_pull >= skb->len)
822 dflag = 1;
823 } else {
824 #endif
825 /* No DLE's in buff, so simply copy it */
826 dflag = 1;
827 if ((count_pull = skb->len) > len) {
828 count_pull = len;
829 dflag = 0;
830 }
831 count_put = count_pull;
832 memcpy(cp, skb->data, count_put);
833 cp += count_put;
834 len -= count_put;
835 #ifdef CONFIG_ISDN_AUDIO
836 }
837 #endif
838 count += count_put;
839 if (fp) {
840 memset(fp, 0, count_put);
841 fp += count_put;
842 }
843 if (dflag) {
844 /* We got all the data in this buff.
845 * Now we can dequeue it.
846 */
847 if (fp)
848 *(fp - 1) = 0xff;
849 #ifdef CONFIG_ISDN_AUDIO
850 ISDN_AUDIO_SKB_LOCK(skb) = 0;
851 #endif
852 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
853 dev_kfree_skb(skb);
854 } else {
855 /* Not yet emptied this buff, so it
856 * must stay in the queue, for further calls
857 * but we pull off the data we got until now.
858 */
859 skb_pull(skb, count_pull);
860 #ifdef CONFIG_ISDN_AUDIO
861 ISDN_AUDIO_SKB_LOCK(skb) = 0;
862 #endif
863 }
864 dev->drv[di]->rcvcount[channel] -= count_put;
865 }
866 return count;
867 }
868
869 /*
870 * isdn_readbchan_tty() tries to get data from the read-queue.
871 * It MUST be called with interrupts off.
872 *
873 * Be aware that this is not an atomic operation when sleep != 0, even though
874 * interrupts are turned off! Well, like that we are currently only called
875 * on behalf of a read system call on raw device files (which are documented
876 * to be dangerous and for for debugging purpose only). The inode semaphore
877 * takes care that this is not called for the same minor device number while
878 * we are sleeping, but access is not serialized against simultaneous read()
879 * from the corresponding ttyI device. Can other ugly events, like changes
880 * of the mapping (di,ch)<->minor, happen during the sleep? --he
881 */
882 int
883 isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
884 {
885 int count;
886 int count_pull;
887 int count_put;
888 int dflag;
889 struct sk_buff *skb;
890 char last = 0;
891 int len;
892
893 if (!dev->drv[di])
894 return 0;
895 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
896 return 0;
897
898 len = tty_buffer_request_room(tty, dev->drv[di]->rcvcount[channel]);
899 if(len == 0)
900 return len;
901
902 count = 0;
903 while (len) {
904 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
905 break;
906 #ifdef CONFIG_ISDN_AUDIO
907 if (ISDN_AUDIO_SKB_LOCK(skb))
908 break;
909 ISDN_AUDIO_SKB_LOCK(skb) = 1;
910 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
911 char *p = skb->data;
912 unsigned long DLEmask = (1 << channel);
913
914 dflag = 0;
915 count_pull = count_put = 0;
916 while ((count_pull < skb->len) && (len > 0)) {
917 len--;
918 if (dev->drv[di]->DLEflag & DLEmask) {
919 last = DLE;
920 dev->drv[di]->DLEflag &= ~DLEmask;
921 } else {
922 last = *p;
923 if (last == DLE) {
924 dev->drv[di]->DLEflag |= DLEmask;
925 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
926 }
927 p++;
928 count_pull++;
929 }
930 count_put++;
931 }
932 if (count_pull >= skb->len)
933 dflag = 1;
934 } else {
935 #endif
936 /* No DLE's in buff, so simply copy it */
937 dflag = 1;
938 if ((count_pull = skb->len) > len) {
939 count_pull = len;
940 dflag = 0;
941 }
942 count_put = count_pull;
943 if(count_put > 1)
944 tty_insert_flip_string(tty, skb->data, count_put - 1);
945 last = skb->data[count_put - 1];
946 len -= count_put;
947 #ifdef CONFIG_ISDN_AUDIO
948 }
949 #endif
950 count += count_put;
951 if (dflag) {
952 /* We got all the data in this buff.
953 * Now we can dequeue it.
954 */
955 if(cisco_hack)
956 tty_insert_flip_char(tty, last, 0xFF);
957 else
958 tty_insert_flip_char(tty, last, TTY_NORMAL);
959 #ifdef CONFIG_ISDN_AUDIO
960 ISDN_AUDIO_SKB_LOCK(skb) = 0;
961 #endif
962 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
963 dev_kfree_skb(skb);
964 } else {
965 tty_insert_flip_char(tty, last, TTY_NORMAL);
966 /* Not yet emptied this buff, so it
967 * must stay in the queue, for further calls
968 * but we pull off the data we got until now.
969 */
970 skb_pull(skb, count_pull);
971 #ifdef CONFIG_ISDN_AUDIO
972 ISDN_AUDIO_SKB_LOCK(skb) = 0;
973 #endif
974 }
975 dev->drv[di]->rcvcount[channel] -= count_put;
976 }
977 return count;
978 }
979
980
981 static __inline int
982 isdn_minor2drv(int minor)
983 {
984 return (dev->drvmap[minor]);
985 }
986
987 static __inline int
988 isdn_minor2chan(int minor)
989 {
990 return (dev->chanmap[minor]);
991 }
992
993 static char *
994 isdn_statstr(void)
995 {
996 static char istatbuf[2048];
997 char *p;
998 int i;
999
1000 sprintf(istatbuf, "idmap:\t");
1001 p = istatbuf + strlen(istatbuf);
1002 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1003 sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
1004 p = istatbuf + strlen(istatbuf);
1005 }
1006 sprintf(p, "\nchmap:\t");
1007 p = istatbuf + strlen(istatbuf);
1008 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1009 sprintf(p, "%d ", dev->chanmap[i]);
1010 p = istatbuf + strlen(istatbuf);
1011 }
1012 sprintf(p, "\ndrmap:\t");
1013 p = istatbuf + strlen(istatbuf);
1014 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1015 sprintf(p, "%d ", dev->drvmap[i]);
1016 p = istatbuf + strlen(istatbuf);
1017 }
1018 sprintf(p, "\nusage:\t");
1019 p = istatbuf + strlen(istatbuf);
1020 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1021 sprintf(p, "%d ", dev->usage[i]);
1022 p = istatbuf + strlen(istatbuf);
1023 }
1024 sprintf(p, "\nflags:\t");
1025 p = istatbuf + strlen(istatbuf);
1026 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
1027 if (dev->drv[i]) {
1028 sprintf(p, "%ld ", dev->drv[i]->online);
1029 p = istatbuf + strlen(istatbuf);
1030 } else {
1031 sprintf(p, "? ");
1032 p = istatbuf + strlen(istatbuf);
1033 }
1034 }
1035 sprintf(p, "\nphone:\t");
1036 p = istatbuf + strlen(istatbuf);
1037 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1038 sprintf(p, "%s ", dev->num[i]);
1039 p = istatbuf + strlen(istatbuf);
1040 }
1041 sprintf(p, "\n");
1042 return istatbuf;
1043 }
1044
1045 /* Module interface-code */
1046
1047 void
1048 isdn_info_update(void)
1049 {
1050 infostruct *p = dev->infochain;
1051
1052 while (p) {
1053 *(p->private) = 1;
1054 p = (infostruct *) p->next;
1055 }
1056 wake_up_interruptible(&(dev->info_waitq));
1057 }
1058
1059 static ssize_t
1060 isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
1061 {
1062 uint minor = iminor(file->f_dentry->d_inode);
1063 int len = 0;
1064 int drvidx;
1065 int chidx;
1066 int retval;
1067 char *p;
1068
1069 lock_kernel();
1070 if (minor == ISDN_MINOR_STATUS) {
1071 if (!file->private_data) {
1072 if (file->f_flags & O_NONBLOCK) {
1073 retval = -EAGAIN;
1074 goto out;
1075 }
1076 interruptible_sleep_on(&(dev->info_waitq));
1077 }
1078 p = isdn_statstr();
1079 file->private_data = NULL;
1080 if ((len = strlen(p)) <= count) {
1081 if (copy_to_user(buf, p, len)) {
1082 retval = -EFAULT;
1083 goto out;
1084 }
1085 *off += len;
1086 retval = len;
1087 goto out;
1088 }
1089 retval = 0;
1090 goto out;
1091 }
1092 if (!dev->drivers) {
1093 retval = -ENODEV;
1094 goto out;
1095 }
1096 if (minor <= ISDN_MINOR_BMAX) {
1097 printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
1098 drvidx = isdn_minor2drv(minor);
1099 if (drvidx < 0) {
1100 retval = -ENODEV;
1101 goto out;
1102 }
1103 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1104 retval = -ENODEV;
1105 goto out;
1106 }
1107 chidx = isdn_minor2chan(minor);
1108 if (!(p = kmalloc(count, GFP_KERNEL))) {
1109 retval = -ENOMEM;
1110 goto out;
1111 }
1112 len = isdn_readbchan(drvidx, chidx, p, NULL, count,
1113 &dev->drv[drvidx]->rcv_waitq[chidx]);
1114 *off += len;
1115 if (copy_to_user(buf,p,len))
1116 len = -EFAULT;
1117 kfree(p);
1118 retval = len;
1119 goto out;
1120 }
1121 if (minor <= ISDN_MINOR_CTRLMAX) {
1122 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1123 if (drvidx < 0) {
1124 retval = -ENODEV;
1125 goto out;
1126 }
1127 if (!dev->drv[drvidx]->stavail) {
1128 if (file->f_flags & O_NONBLOCK) {
1129 retval = -EAGAIN;
1130 goto out;
1131 }
1132 interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
1133 }
1134 if (dev->drv[drvidx]->interface->readstat) {
1135 if (count > dev->drv[drvidx]->stavail)
1136 count = dev->drv[drvidx]->stavail;
1137 len = dev->drv[drvidx]->interface->readstat(buf, count,
1138 drvidx, isdn_minor2chan(minor));
1139 if (len < 0) {
1140 retval = len;
1141 goto out;
1142 }
1143 } else {
1144 len = 0;
1145 }
1146 if (len)
1147 dev->drv[drvidx]->stavail -= len;
1148 else
1149 dev->drv[drvidx]->stavail = 0;
1150 *off += len;
1151 retval = len;
1152 goto out;
1153 }
1154 #ifdef CONFIG_ISDN_PPP
1155 if (minor <= ISDN_MINOR_PPPMAX) {
1156 retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
1157 goto out;
1158 }
1159 #endif
1160 retval = -ENODEV;
1161 out:
1162 unlock_kernel();
1163 return retval;
1164 }
1165
1166 static ssize_t
1167 isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
1168 {
1169 uint minor = iminor(file->f_dentry->d_inode);
1170 int drvidx;
1171 int chidx;
1172 int retval;
1173
1174 if (minor == ISDN_MINOR_STATUS)
1175 return -EPERM;
1176 if (!dev->drivers)
1177 return -ENODEV;
1178
1179 lock_kernel();
1180 if (minor <= ISDN_MINOR_BMAX) {
1181 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
1182 drvidx = isdn_minor2drv(minor);
1183 if (drvidx < 0) {
1184 retval = -ENODEV;
1185 goto out;
1186 }
1187 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1188 retval = -ENODEV;
1189 goto out;
1190 }
1191 chidx = isdn_minor2chan(minor);
1192 while ((retval = isdn_writebuf_stub(drvidx, chidx, buf, count)) == 0)
1193 interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]);
1194 goto out;
1195 }
1196 if (minor <= ISDN_MINOR_CTRLMAX) {
1197 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1198 if (drvidx < 0) {
1199 retval = -ENODEV;
1200 goto out;
1201 }
1202 /*
1203 * We want to use the isdnctrl device to load the firmware
1204 *
1205 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1206 return -ENODEV;
1207 */
1208 if (dev->drv[drvidx]->interface->writecmd)
1209 retval = dev->drv[drvidx]->interface->
1210 writecmd(buf, count, drvidx, isdn_minor2chan(minor));
1211 else
1212 retval = count;
1213 goto out;
1214 }
1215 #ifdef CONFIG_ISDN_PPP
1216 if (minor <= ISDN_MINOR_PPPMAX) {
1217 retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
1218 goto out;
1219 }
1220 #endif
1221 retval = -ENODEV;
1222 out:
1223 unlock_kernel();
1224 return retval;
1225 }
1226
1227 static unsigned int
1228 isdn_poll(struct file *file, poll_table * wait)
1229 {
1230 unsigned int mask = 0;
1231 unsigned int minor = iminor(file->f_dentry->d_inode);
1232 int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1233
1234 lock_kernel();
1235 if (minor == ISDN_MINOR_STATUS) {
1236 poll_wait(file, &(dev->info_waitq), wait);
1237 /* mask = POLLOUT | POLLWRNORM; */
1238 if (file->private_data) {
1239 mask |= POLLIN | POLLRDNORM;
1240 }
1241 goto out;
1242 }
1243 if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1244 if (drvidx < 0) {
1245 /* driver deregistered while file open */
1246 mask = POLLHUP;
1247 goto out;
1248 }
1249 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1250 mask = POLLOUT | POLLWRNORM;
1251 if (dev->drv[drvidx]->stavail) {
1252 mask |= POLLIN | POLLRDNORM;
1253 }
1254 goto out;
1255 }
1256 #ifdef CONFIG_ISDN_PPP
1257 if (minor <= ISDN_MINOR_PPPMAX) {
1258 mask = isdn_ppp_poll(file, wait);
1259 goto out;
1260 }
1261 #endif
1262 mask = POLLERR;
1263 out:
1264 unlock_kernel();
1265 return mask;
1266 }
1267
1268
1269 static int
1270 isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
1271 {
1272 uint minor = iminor(inode);
1273 isdn_ctrl c;
1274 int drvidx;
1275 int chidx;
1276 int ret;
1277 int i;
1278 char __user *p;
1279 char *s;
1280 union iocpar {
1281 char name[10];
1282 char bname[22];
1283 isdn_ioctl_struct iocts;
1284 isdn_net_ioctl_phone phone;
1285 isdn_net_ioctl_cfg cfg;
1286 } iocpar;
1287 void __user *argp = (void __user *)arg;
1288
1289 #define name iocpar.name
1290 #define bname iocpar.bname
1291 #define iocts iocpar.iocts
1292 #define phone iocpar.phone
1293 #define cfg iocpar.cfg
1294
1295 if (minor == ISDN_MINOR_STATUS) {
1296 switch (cmd) {
1297 case IIOCGETDVR:
1298 return (TTY_DV +
1299 (NET_DV << 8) +
1300 (INF_DV << 16));
1301 case IIOCGETCPS:
1302 if (arg) {
1303 ulong __user *p = argp;
1304 int i;
1305 if (!access_ok(VERIFY_WRITE, p,
1306 sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1307 return -EFAULT;
1308 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1309 put_user(dev->ibytes[i], p++);
1310 put_user(dev->obytes[i], p++);
1311 }
1312 return 0;
1313 } else
1314 return -EINVAL;
1315 break;
1316 #ifdef CONFIG_NETDEVICES
1317 case IIOCNETGPN:
1318 /* Get peer phone number of a connected
1319 * isdn network interface */
1320 if (arg) {
1321 if (copy_from_user(&phone, argp, sizeof(phone)))
1322 return -EFAULT;
1323 return isdn_net_getpeer(&phone, argp);
1324 } else
1325 return -EINVAL;
1326 #endif
1327 default:
1328 return -EINVAL;
1329 }
1330 }
1331 if (!dev->drivers)
1332 return -ENODEV;
1333 if (minor <= ISDN_MINOR_BMAX) {
1334 drvidx = isdn_minor2drv(minor);
1335 if (drvidx < 0)
1336 return -ENODEV;
1337 chidx = isdn_minor2chan(minor);
1338 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1339 return -ENODEV;
1340 return 0;
1341 }
1342 if (minor <= ISDN_MINOR_CTRLMAX) {
1343 /*
1344 * isdn net devices manage lots of configuration variables as linked lists.
1345 * Those lists must only be manipulated from user space. Some of the ioctl's
1346 * service routines access user space and are not atomic. Therefor, ioctl's
1347 * manipulating the lists and ioctl's sleeping while accessing the lists
1348 * are serialized by means of a semaphore.
1349 */
1350 switch (cmd) {
1351 case IIOCNETDWRSET:
1352 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1353 return(-EINVAL);
1354 case IIOCNETLCR:
1355 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1356 return -ENODEV;
1357 #ifdef CONFIG_NETDEVICES
1358 case IIOCNETAIF:
1359 /* Add a network-interface */
1360 if (arg) {
1361 if (copy_from_user(name, argp, sizeof(name)))
1362 return -EFAULT;
1363 s = name;
1364 } else {
1365 s = NULL;
1366 }
1367 ret = down_interruptible(&dev->sem);
1368 if( ret ) return ret;
1369 if ((s = isdn_net_new(s, NULL))) {
1370 if (copy_to_user(argp, s, strlen(s) + 1)){
1371 ret = -EFAULT;
1372 } else {
1373 ret = 0;
1374 }
1375 } else
1376 ret = -ENODEV;
1377 up(&dev->sem);
1378 return ret;
1379 case IIOCNETASL:
1380 /* Add a slave to a network-interface */
1381 if (arg) {
1382 if (copy_from_user(bname, argp, sizeof(bname) - 1))
1383 return -EFAULT;
1384 } else
1385 return -EINVAL;
1386 ret = down_interruptible(&dev->sem);
1387 if( ret ) return ret;
1388 if ((s = isdn_net_newslave(bname))) {
1389 if (copy_to_user(argp, s, strlen(s) + 1)){
1390 ret = -EFAULT;
1391 } else {
1392 ret = 0;
1393 }
1394 } else
1395 ret = -ENODEV;
1396 up(&dev->sem);
1397 return ret;
1398 case IIOCNETDIF:
1399 /* Delete a network-interface */
1400 if (arg) {
1401 if (copy_from_user(name, argp, sizeof(name)))
1402 return -EFAULT;
1403 ret = down_interruptible(&dev->sem);
1404 if( ret ) return ret;
1405 ret = isdn_net_rm(name);
1406 up(&dev->sem);
1407 return ret;
1408 } else
1409 return -EINVAL;
1410 case IIOCNETSCF:
1411 /* Set configurable parameters of a network-interface */
1412 if (arg) {
1413 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1414 return -EFAULT;
1415 return isdn_net_setcfg(&cfg);
1416 } else
1417 return -EINVAL;
1418 case IIOCNETGCF:
1419 /* Get configurable parameters of a network-interface */
1420 if (arg) {
1421 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1422 return -EFAULT;
1423 if (!(ret = isdn_net_getcfg(&cfg))) {
1424 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1425 return -EFAULT;
1426 }
1427 return ret;
1428 } else
1429 return -EINVAL;
1430 case IIOCNETANM:
1431 /* Add a phone-number to a network-interface */
1432 if (arg) {
1433 if (copy_from_user(&phone, argp, sizeof(phone)))
1434 return -EFAULT;
1435 ret = down_interruptible(&dev->sem);
1436 if( ret ) return ret;
1437 ret = isdn_net_addphone(&phone);
1438 up(&dev->sem);
1439 return ret;
1440 } else
1441 return -EINVAL;
1442 case IIOCNETGNM:
1443 /* Get list of phone-numbers of a network-interface */
1444 if (arg) {
1445 if (copy_from_user(&phone, argp, sizeof(phone)))
1446 return -EFAULT;
1447 ret = down_interruptible(&dev->sem);
1448 if( ret ) return ret;
1449 ret = isdn_net_getphones(&phone, argp);
1450 up(&dev->sem);
1451 return ret;
1452 } else
1453 return -EINVAL;
1454 case IIOCNETDNM:
1455 /* Delete a phone-number of a network-interface */
1456 if (arg) {
1457 if (copy_from_user(&phone, argp, sizeof(phone)))
1458 return -EFAULT;
1459 ret = down_interruptible(&dev->sem);
1460 if( ret ) return ret;
1461 ret = isdn_net_delphone(&phone);
1462 up(&dev->sem);
1463 return ret;
1464 } else
1465 return -EINVAL;
1466 case IIOCNETDIL:
1467 /* Force dialing of a network-interface */
1468 if (arg) {
1469 if (copy_from_user(name, argp, sizeof(name)))
1470 return -EFAULT;
1471 return isdn_net_force_dial(name);
1472 } else
1473 return -EINVAL;
1474 #ifdef CONFIG_ISDN_PPP
1475 case IIOCNETALN:
1476 if (!arg)
1477 return -EINVAL;
1478 if (copy_from_user(name, argp, sizeof(name)))
1479 return -EFAULT;
1480 return isdn_ppp_dial_slave(name);
1481 case IIOCNETDLN:
1482 if (!arg)
1483 return -EINVAL;
1484 if (copy_from_user(name, argp, sizeof(name)))
1485 return -EFAULT;
1486 return isdn_ppp_hangup_slave(name);
1487 #endif
1488 case IIOCNETHUP:
1489 /* Force hangup of a network-interface */
1490 if (!arg)
1491 return -EINVAL;
1492 if (copy_from_user(name, argp, sizeof(name)))
1493 return -EFAULT;
1494 return isdn_net_force_hangup(name);
1495 break;
1496 #endif /* CONFIG_NETDEVICES */
1497 case IIOCSETVER:
1498 dev->net_verbose = arg;
1499 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1500 return 0;
1501 case IIOCSETGST:
1502 if (arg)
1503 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1504 else
1505 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1506 printk(KERN_INFO "isdn: Global Mode %s\n",
1507 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1508 return 0;
1509 case IIOCSETBRJ:
1510 drvidx = -1;
1511 if (arg) {
1512 int i;
1513 char *p;
1514 if (copy_from_user(&iocts, argp,
1515 sizeof(isdn_ioctl_struct)))
1516 return -EFAULT;
1517 if (strlen(iocts.drvid)) {
1518 if ((p = strchr(iocts.drvid, ',')))
1519 *p = 0;
1520 drvidx = -1;
1521 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1522 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1523 drvidx = i;
1524 break;
1525 }
1526 }
1527 }
1528 if (drvidx == -1)
1529 return -ENODEV;
1530 if (iocts.arg)
1531 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1532 else
1533 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1534 return 0;
1535 case IIOCSIGPRF:
1536 dev->profd = current;
1537 return 0;
1538 break;
1539 case IIOCGETPRF:
1540 /* Get all Modem-Profiles */
1541 if (arg) {
1542 char __user *p = argp;
1543 int i;
1544
1545 if (!access_ok(VERIFY_WRITE, argp,
1546 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1547 * ISDN_MAX_CHANNELS))
1548 return -EFAULT;
1549
1550 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1551 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1552 ISDN_MODEM_NUMREG))
1553 return -EFAULT;
1554 p += ISDN_MODEM_NUMREG;
1555 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1556 return -EFAULT;
1557 p += ISDN_MSNLEN;
1558 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1559 return -EFAULT;
1560 p += ISDN_LMSNLEN;
1561 }
1562 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1563 } else
1564 return -EINVAL;
1565 break;
1566 case IIOCSETPRF:
1567 /* Set all Modem-Profiles */
1568 if (arg) {
1569 char __user *p = argp;
1570 int i;
1571
1572 if (!access_ok(VERIFY_READ, argp,
1573 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1574 * ISDN_MAX_CHANNELS))
1575 return -EFAULT;
1576
1577 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1578 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1579 ISDN_MODEM_NUMREG))
1580 return -EFAULT;
1581 p += ISDN_MODEM_NUMREG;
1582 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1583 return -EFAULT;
1584 p += ISDN_LMSNLEN;
1585 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1586 return -EFAULT;
1587 p += ISDN_MSNLEN;
1588 }
1589 return 0;
1590 } else
1591 return -EINVAL;
1592 break;
1593 case IIOCSETMAP:
1594 case IIOCGETMAP:
1595 /* Set/Get MSN->EAZ-Mapping for a driver */
1596 if (arg) {
1597
1598 if (copy_from_user(&iocts, argp,
1599 sizeof(isdn_ioctl_struct)))
1600 return -EFAULT;
1601 if (strlen(iocts.drvid)) {
1602 drvidx = -1;
1603 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1604 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1605 drvidx = i;
1606 break;
1607 }
1608 } else
1609 drvidx = 0;
1610 if (drvidx == -1)
1611 return -ENODEV;
1612 if (cmd == IIOCSETMAP) {
1613 int loop = 1;
1614
1615 p = (char __user *) iocts.arg;
1616 i = 0;
1617 while (loop) {
1618 int j = 0;
1619
1620 while (1) {
1621 if (!access_ok(VERIFY_READ, p, 1))
1622 return -EFAULT;
1623 get_user(bname[j], p++);
1624 switch (bname[j]) {
1625 case '\0':
1626 loop = 0;
1627 /* Fall through */
1628 case ',':
1629 bname[j] = '\0';
1630 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1631 j = ISDN_MSNLEN;
1632 break;
1633 default:
1634 j++;
1635 }
1636 if (j >= ISDN_MSNLEN)
1637 break;
1638 }
1639 if (++i > 9)
1640 break;
1641 }
1642 } else {
1643 p = (char __user *) iocts.arg;
1644 for (i = 0; i < 10; i++) {
1645 sprintf(bname, "%s%s",
1646 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1647 dev->drv[drvidx]->msn2eaz[i] : "_",
1648 (i < 9) ? "," : "\0");
1649 if (copy_to_user(p, bname, strlen(bname) + 1))
1650 return -EFAULT;
1651 p += strlen(bname);
1652 }
1653 }
1654 return 0;
1655 } else
1656 return -EINVAL;
1657 case IIOCDBGVAR:
1658 if (arg) {
1659 if (copy_to_user(argp, &dev, sizeof(ulong)))
1660 return -EFAULT;
1661 return 0;
1662 } else
1663 return -EINVAL;
1664 break;
1665 default:
1666 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1667 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1668 else
1669 return -EINVAL;
1670 if (arg) {
1671 int i;
1672 char *p;
1673 if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
1674 return -EFAULT;
1675 if (strlen(iocts.drvid)) {
1676 if ((p = strchr(iocts.drvid, ',')))
1677 *p = 0;
1678 drvidx = -1;
1679 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1680 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1681 drvidx = i;
1682 break;
1683 }
1684 } else
1685 drvidx = 0;
1686 if (drvidx == -1)
1687 return -ENODEV;
1688 if (!access_ok(VERIFY_WRITE, argp,
1689 sizeof(isdn_ioctl_struct)))
1690 return -EFAULT;
1691 c.driver = drvidx;
1692 c.command = ISDN_CMD_IOCTL;
1693 c.arg = cmd;
1694 memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1695 ret = isdn_command(&c);
1696 memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1697 if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1698 return -EFAULT;
1699 return ret;
1700 } else
1701 return -EINVAL;
1702 }
1703 }
1704 #ifdef CONFIG_ISDN_PPP
1705 if (minor <= ISDN_MINOR_PPPMAX)
1706 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1707 #endif
1708 return -ENODEV;
1709
1710 #undef name
1711 #undef bname
1712 #undef iocts
1713 #undef phone
1714 #undef cfg
1715 }
1716
1717 /*
1718 * Open the device code.
1719 */
1720 static int
1721 isdn_open(struct inode *ino, struct file *filep)
1722 {
1723 uint minor = iminor(ino);
1724 int drvidx;
1725 int chidx;
1726 int retval = -ENODEV;
1727
1728
1729 if (minor == ISDN_MINOR_STATUS) {
1730 infostruct *p;
1731
1732 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1733 p->next = (char *) dev->infochain;
1734 p->private = (char *) &(filep->private_data);
1735 dev->infochain = p;
1736 /* At opening we allow a single update */
1737 filep->private_data = (char *) 1;
1738 retval = 0;
1739 goto out;
1740 } else {
1741 retval = -ENOMEM;
1742 goto out;
1743 }
1744 }
1745 if (!dev->channels)
1746 goto out;
1747 if (minor <= ISDN_MINOR_BMAX) {
1748 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1749 drvidx = isdn_minor2drv(minor);
1750 if (drvidx < 0)
1751 goto out;
1752 chidx = isdn_minor2chan(minor);
1753 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1754 goto out;
1755 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1756 goto out;
1757 isdn_lock_drivers();
1758 retval = 0;
1759 goto out;
1760 }
1761 if (minor <= ISDN_MINOR_CTRLMAX) {
1762 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1763 if (drvidx < 0)
1764 goto out;
1765 isdn_lock_drivers();
1766 retval = 0;
1767 goto out;
1768 }
1769 #ifdef CONFIG_ISDN_PPP
1770 if (minor <= ISDN_MINOR_PPPMAX) {
1771 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1772 if (retval == 0)
1773 isdn_lock_drivers();
1774 goto out;
1775 }
1776 #endif
1777 out:
1778 nonseekable_open(ino, filep);
1779 return retval;
1780 }
1781
1782 static int
1783 isdn_close(struct inode *ino, struct file *filep)
1784 {
1785 uint minor = iminor(ino);
1786
1787 lock_kernel();
1788 if (minor == ISDN_MINOR_STATUS) {
1789 infostruct *p = dev->infochain;
1790 infostruct *q = NULL;
1791
1792 while (p) {
1793 if (p->private == (char *) &(filep->private_data)) {
1794 if (q)
1795 q->next = p->next;
1796 else
1797 dev->infochain = (infostruct *) (p->next);
1798 kfree(p);
1799 goto out;
1800 }
1801 q = p;
1802 p = (infostruct *) (p->next);
1803 }
1804 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1805 goto out;
1806 }
1807 isdn_unlock_drivers();
1808 if (minor <= ISDN_MINOR_BMAX)
1809 goto out;
1810 if (minor <= ISDN_MINOR_CTRLMAX) {
1811 if (dev->profd == current)
1812 dev->profd = NULL;
1813 goto out;
1814 }
1815 #ifdef CONFIG_ISDN_PPP
1816 if (minor <= ISDN_MINOR_PPPMAX)
1817 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1818 #endif
1819
1820 out:
1821 unlock_kernel();
1822 return 0;
1823 }
1824
1825 static struct file_operations isdn_fops =
1826 {
1827 .owner = THIS_MODULE,
1828 .llseek = no_llseek,
1829 .read = isdn_read,
1830 .write = isdn_write,
1831 .poll = isdn_poll,
1832 .ioctl = isdn_ioctl,
1833 .open = isdn_open,
1834 .release = isdn_close,
1835 };
1836
1837 char *
1838 isdn_map_eaz2msn(char *msn, int di)
1839 {
1840 isdn_driver_t *this = dev->drv[di];
1841 int i;
1842
1843 if (strlen(msn) == 1) {
1844 i = msn[0] - '0';
1845 if ((i >= 0) && (i <= 9))
1846 if (strlen(this->msn2eaz[i]))
1847 return (this->msn2eaz[i]);
1848 }
1849 return (msn);
1850 }
1851
1852 /*
1853 * Find an unused ISDN-channel, whose feature-flags match the
1854 * given L2- and L3-protocols.
1855 */
1856 #define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1857
1858 /*
1859 * This function must be called with holding the dev->lock.
1860 */
1861 int
1862 isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1863 ,int pre_chan, char *msn)
1864 {
1865 int i;
1866 ulong features;
1867 ulong vfeatures;
1868
1869 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1870 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1871 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1872 /* If Layer-2 protocol is V.110, accept drivers with
1873 * transparent feature even if these don't support V.110
1874 * because we can emulate this in linklevel.
1875 */
1876 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1877 if (USG_NONE(dev->usage[i]) &&
1878 (dev->drvmap[i] != -1)) {
1879 int d = dev->drvmap[i];
1880 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1881 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1882 continue;
1883 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1884 continue;
1885 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1886 continue; /* usage not allowed */
1887 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1888 if (((dev->drv[d]->interface->features & features) == features) ||
1889 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1890 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1891 if ((pre_dev < 0) || (pre_chan < 0)) {
1892 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1893 dev->usage[i] |= usage;
1894 isdn_info_update();
1895 return i;
1896 } else {
1897 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1898 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1899 dev->usage[i] |= usage;
1900 isdn_info_update();
1901 return i;
1902 }
1903 }
1904 }
1905 }
1906 }
1907 return -1;
1908 }
1909
1910 /*
1911 * Set state of ISDN-channel to 'unused'
1912 */
1913 void
1914 isdn_free_channel(int di, int ch, int usage)
1915 {
1916 int i;
1917
1918 if ((di < 0) || (ch < 0)) {
1919 printk(KERN_WARNING "%s: called with invalid drv(%d) or channel(%d)\n",
1920 __FUNCTION__, di, ch);
1921 return;
1922 }
1923 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1924 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1925 (dev->drvmap[i] == di) &&
1926 (dev->chanmap[i] == ch)) {
1927 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1928 strcpy(dev->num[i], "???");
1929 dev->ibytes[i] = 0;
1930 dev->obytes[i] = 0;
1931 // 20.10.99 JIM, try to reinitialize v110 !
1932 dev->v110emu[i] = 0;
1933 atomic_set(&(dev->v110use[i]), 0);
1934 isdn_v110_close(dev->v110[i]);
1935 dev->v110[i] = NULL;
1936 // 20.10.99 JIM, try to reinitialize v110 !
1937 isdn_info_update();
1938 if (dev->drv[di])
1939 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1940 }
1941 }
1942
1943 /*
1944 * Cancel Exclusive-Flag for ISDN-channel
1945 */
1946 void
1947 isdn_unexclusive_channel(int di, int ch)
1948 {
1949 int i;
1950
1951 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1952 if ((dev->drvmap[i] == di) &&
1953 (dev->chanmap[i] == ch)) {
1954 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1955 isdn_info_update();
1956 return;
1957 }
1958 }
1959
1960 /*
1961 * writebuf replacement for SKB_ABLE drivers
1962 */
1963 static int
1964 isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
1965 {
1966 int ret;
1967 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1968 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1969
1970 if (!skb)
1971 return -ENOMEM;
1972 skb_reserve(skb, hl);
1973 if (copy_from_user(skb_put(skb, len), buf, len))
1974 return -EFAULT;
1975 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
1976 if (ret <= 0)
1977 dev_kfree_skb(skb);
1978 if (ret > 0)
1979 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
1980 return ret;
1981 }
1982
1983 /*
1984 * Return: length of data on success, -ERRcode on failure.
1985 */
1986 int
1987 isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
1988 {
1989 int ret;
1990 struct sk_buff *nskb = NULL;
1991 int v110_ret = skb->len;
1992 int idx = isdn_dc2minor(drvidx, chan);
1993
1994 if (dev->v110[idx]) {
1995 atomic_inc(&dev->v110use[idx]);
1996 nskb = isdn_v110_encode(dev->v110[idx], skb);
1997 atomic_dec(&dev->v110use[idx]);
1998 if (!nskb)
1999 return 0;
2000 v110_ret = *((int *)nskb->data);
2001 skb_pull(nskb, sizeof(int));
2002 if (!nskb->len) {
2003 dev_kfree_skb(nskb);
2004 return v110_ret;
2005 }
2006 /* V.110 must always be acknowledged */
2007 ack = 1;
2008 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
2009 } else {
2010 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
2011
2012 if( skb_headroom(skb) < hl ){
2013 /*
2014 * This should only occur when new HL driver with
2015 * increased hl_hdrlen was loaded after netdevice
2016 * was created and connected to the new driver.
2017 *
2018 * The V.110 branch (re-allocates on its own) does
2019 * not need this
2020 */
2021 struct sk_buff * skb_tmp;
2022
2023 skb_tmp = skb_realloc_headroom(skb, hl);
2024 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
2025 if (!skb_tmp) return -ENOMEM; /* 0 better? */
2026 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
2027 if( ret > 0 ){
2028 dev_kfree_skb(skb);
2029 } else {
2030 dev_kfree_skb(skb_tmp);
2031 }
2032 } else {
2033 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
2034 }
2035 }
2036 if (ret > 0) {
2037 dev->obytes[idx] += ret;
2038 if (dev->v110[idx]) {
2039 atomic_inc(&dev->v110use[idx]);
2040 dev->v110[idx]->skbuser++;
2041 atomic_dec(&dev->v110use[idx]);
2042 /* For V.110 return unencoded data length */
2043 ret = v110_ret;
2044 /* if the complete frame was send we free the skb;
2045 if not upper function will requeue the skb */
2046 if (ret == skb->len)
2047 dev_kfree_skb(skb);
2048 }
2049 } else
2050 if (dev->v110[idx])
2051 dev_kfree_skb(nskb);
2052 return ret;
2053 }
2054
2055 static int
2056 isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
2057 {
2058 int j, k, m;
2059
2060 init_waitqueue_head(&d->st_waitq);
2061 if (d->flags & DRV_FLAG_RUNNING)
2062 return -1;
2063 if (n < 1) return 0;
2064
2065 m = (adding) ? d->channels + n : n;
2066
2067 if (dev->channels + n > ISDN_MAX_CHANNELS) {
2068 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2069 ISDN_MAX_CHANNELS);
2070 return -1;
2071 }
2072
2073 if ((adding) && (d->rcverr))
2074 kfree(d->rcverr);
2075 if (!(d->rcverr = kmalloc(sizeof(int) * m, GFP_ATOMIC))) {
2076 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2077 return -1;
2078 }
2079 memset((char *) d->rcverr, 0, sizeof(int) * m);
2080
2081 if ((adding) && (d->rcvcount))
2082 kfree(d->rcvcount);
2083 if (!(d->rcvcount = kmalloc(sizeof(int) * m, GFP_ATOMIC))) {
2084 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
2085 if (!adding)
2086 kfree(d->rcverr);
2087 return -1;
2088 }
2089 memset((char *) d->rcvcount, 0, sizeof(int) * m);
2090
2091 if ((adding) && (d->rpqueue)) {
2092 for (j = 0; j < d->channels; j++)
2093 skb_queue_purge(&d->rpqueue[j]);
2094 kfree(d->rpqueue);
2095 }
2096 if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
2097 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2098 if (!adding) {
2099 kfree(d->rcvcount);
2100 kfree(d->rcverr);
2101 }
2102 return -1;
2103 }
2104 for (j = 0; j < m; j++) {
2105 skb_queue_head_init(&d->rpqueue[j]);
2106 }
2107
2108 if ((adding) && (d->rcv_waitq))
2109 kfree(d->rcv_waitq);
2110 d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_ATOMIC);
2111 if (!d->rcv_waitq) {
2112 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2113 if (!adding) {
2114 kfree(d->rpqueue);
2115 kfree(d->rcvcount);
2116 kfree(d->rcverr);
2117 }
2118 return -1;
2119 }
2120 d->snd_waitq = d->rcv_waitq + m;
2121 for (j = 0; j < m; j++) {
2122 init_waitqueue_head(&d->rcv_waitq[j]);
2123 init_waitqueue_head(&d->snd_waitq[j]);
2124 }
2125
2126 dev->channels += n;
2127 for (j = d->channels; j < m; j++)
2128 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2129 if (dev->chanmap[k] < 0) {
2130 dev->chanmap[k] = j;
2131 dev->drvmap[k] = drvidx;
2132 break;
2133 }
2134 d->channels = m;
2135 return 0;
2136 }
2137
2138 /*
2139 * Low-level-driver registration
2140 */
2141
2142 static void
2143 set_global_features(void)
2144 {
2145 int drvidx;
2146
2147 dev->global_features = 0;
2148 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2149 if (!dev->drv[drvidx])
2150 continue;
2151 if (dev->drv[drvidx]->interface)
2152 dev->global_features |= dev->drv[drvidx]->interface->features;
2153 }
2154 }
2155
2156 #ifdef CONFIG_ISDN_DIVERSION
2157
2158 static char *map_drvname(int di)
2159 {
2160 if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2161 return(NULL);
2162 return(dev->drvid[di]); /* driver name */
2163 } /* map_drvname */
2164
2165 static int map_namedrv(char *id)
2166 { int i;
2167
2168 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2169 { if (!strcmp(dev->drvid[i],id))
2170 return(i);
2171 }
2172 return(-1);
2173 } /* map_namedrv */
2174
2175 int DIVERT_REG_NAME(isdn_divert_if *i_div)
2176 {
2177 if (i_div->if_magic != DIVERT_IF_MAGIC)
2178 return(DIVERT_VER_ERR);
2179 switch (i_div->cmd)
2180 {
2181 case DIVERT_CMD_REL:
2182 if (divert_if != i_div)
2183 return(DIVERT_REL_ERR);
2184 divert_if = NULL; /* free interface */
2185 return(DIVERT_NO_ERR);
2186
2187 case DIVERT_CMD_REG:
2188 if (divert_if)
2189 return(DIVERT_REG_ERR);
2190 i_div->ll_cmd = isdn_command; /* set command function */
2191 i_div->drv_to_name = map_drvname;
2192 i_div->name_to_drv = map_namedrv;
2193 divert_if = i_div; /* remember interface */
2194 return(DIVERT_NO_ERR);
2195
2196 default:
2197 return(DIVERT_CMD_ERR);
2198 }
2199 } /* DIVERT_REG_NAME */
2200
2201 EXPORT_SYMBOL(DIVERT_REG_NAME);
2202
2203 #endif /* CONFIG_ISDN_DIVERSION */
2204
2205
2206 EXPORT_SYMBOL(register_isdn);
2207 #ifdef CONFIG_ISDN_PPP
2208 EXPORT_SYMBOL(isdn_ppp_register_compressor);
2209 EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2210 #endif
2211
2212 int
2213 register_isdn(isdn_if * i)
2214 {
2215 isdn_driver_t *d;
2216 int j;
2217 ulong flags;
2218 int drvidx;
2219
2220 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2221 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2222 ISDN_MAX_DRIVERS);
2223 return 0;
2224 }
2225 if (!i->writebuf_skb) {
2226 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2227 return 0;
2228 }
2229 if (!(d = kmalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
2230 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2231 return 0;
2232 }
2233 memset((char *) d, 0, sizeof(isdn_driver_t));
2234
2235 d->maxbufsize = i->maxbufsize;
2236 d->pktcount = 0;
2237 d->stavail = 0;
2238 d->flags = DRV_FLAG_LOADED;
2239 d->online = 0;
2240 d->interface = i;
2241 d->channels = 0;
2242 spin_lock_irqsave(&dev->lock, flags);
2243 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2244 if (!dev->drv[drvidx])
2245 break;
2246 if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2247 spin_unlock_irqrestore(&dev->lock, flags);
2248 kfree(d);
2249 return 0;
2250 }
2251 i->channels = drvidx;
2252 i->rcvcallb_skb = isdn_receive_skb_callback;
2253 i->statcallb = isdn_status_callback;
2254 if (!strlen(i->id))
2255 sprintf(i->id, "line%d", drvidx);
2256 for (j = 0; j < drvidx; j++)
2257 if (!strcmp(i->id, dev->drvid[j]))
2258 sprintf(i->id, "line%d", drvidx);
2259 dev->drv[drvidx] = d;
2260 strcpy(dev->drvid[drvidx], i->id);
2261 isdn_info_update();
2262 dev->drivers++;
2263 set_global_features();
2264 spin_unlock_irqrestore(&dev->lock, flags);
2265 return 1;
2266 }
2267
2268 /*
2269 *****************************************************************************
2270 * And now the modules code.
2271 *****************************************************************************
2272 */
2273
2274 static char *
2275 isdn_getrev(const char *revision)
2276 {
2277 char *rev;
2278 char *p;
2279
2280 if ((p = strchr(revision, ':'))) {
2281 rev = p + 2;
2282 p = strchr(rev, '$');
2283 *--p = 0;
2284 } else
2285 rev = "???";
2286 return rev;
2287 }
2288
2289 /*
2290 * Allocate and initialize all data, register modem-devices
2291 */
2292 static int __init isdn_init(void)
2293 {
2294 int i;
2295 char tmprev[50];
2296
2297 if (!(dev = (isdn_dev *) vmalloc(sizeof(isdn_dev)))) {
2298 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2299 return -EIO;
2300 }
2301 memset((char *) dev, 0, sizeof(isdn_dev));
2302 init_timer(&dev->timer);
2303 dev->timer.function = isdn_timer_funct;
2304 spin_lock_init(&dev->lock);
2305 spin_lock_init(&dev->timerlock);
2306 #ifdef MODULE
2307 dev->owner = THIS_MODULE;
2308 #endif
2309 init_MUTEX(&dev->sem);
2310 init_waitqueue_head(&dev->info_waitq);
2311 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2312 dev->drvmap[i] = -1;
2313 dev->chanmap[i] = -1;
2314 dev->m_idx[i] = -1;
2315 strcpy(dev->num[i], "???");
2316 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2317 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2318 }
2319 if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2320 printk(KERN_WARNING "isdn: Could not register control devices\n");
2321 vfree(dev);
2322 return -EIO;
2323 }
2324 if ((isdn_tty_modem_init()) < 0) {
2325 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2326 vfree(dev);
2327 unregister_chrdev(ISDN_MAJOR, "isdn");
2328 return -EIO;
2329 }
2330 #ifdef CONFIG_ISDN_PPP
2331 if (isdn_ppp_init() < 0) {
2332 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2333 isdn_tty_exit();
2334 unregister_chrdev(ISDN_MAJOR, "isdn");
2335 vfree(dev);
2336 return -EIO;
2337 }
2338 #endif /* CONFIG_ISDN_PPP */
2339
2340 strcpy(tmprev, isdn_revision);
2341 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2342 strcpy(tmprev, isdn_tty_revision);
2343 printk("%s/", isdn_getrev(tmprev));
2344 strcpy(tmprev, isdn_net_revision);
2345 printk("%s/", isdn_getrev(tmprev));
2346 strcpy(tmprev, isdn_ppp_revision);
2347 printk("%s/", isdn_getrev(tmprev));
2348 strcpy(tmprev, isdn_audio_revision);
2349 printk("%s/", isdn_getrev(tmprev));
2350 strcpy(tmprev, isdn_v110_revision);
2351 printk("%s", isdn_getrev(tmprev));
2352
2353 #ifdef MODULE
2354 printk(" loaded\n");
2355 #else
2356 printk("\n");
2357 #endif
2358 isdn_info_update();
2359 return 0;
2360 }
2361
2362 /*
2363 * Unload module
2364 */
2365 static void __exit isdn_exit(void)
2366 {
2367 #ifdef CONFIG_ISDN_PPP
2368 isdn_ppp_cleanup();
2369 #endif
2370 if (isdn_net_rmall() < 0) {
2371 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2372 return;
2373 }
2374 isdn_tty_exit();
2375 unregister_chrdev(ISDN_MAJOR, "isdn");
2376 del_timer(&dev->timer);
2377 /* call vfree with interrupts enabled, else it will hang */
2378 vfree(dev);
2379 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2380 }
2381
2382 module_init(isdn_init);
2383 module_exit(isdn_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree