1 /* $Id: isdn_common.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
3 * Linux ISDN subsystem, common used functions (linklevel).
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)
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/poll.h>
17 #include <linux/slab.h>
18 #include <linux/vmalloc.h>
19 #include <linux/isdn.h>
20 #include <linux/mutex.h>
21 #include "isdn_common.h"
25 #ifdef CONFIG_ISDN_AUDIO
26 #include "isdn_audio.h"
28 #ifdef CONFIG_ISDN_DIVERSION_MODULE
29 #define CONFIG_ISDN_DIVERSION
31 #ifdef CONFIG_ISDN_DIVERSION
32 #include <linux/isdn_divertif.h>
33 #endif /* CONFIG_ISDN_DIVERSION */
34 #include "isdn_v110.h"
37 #undef ISDN_DEBUG_STATCALLB
39 MODULE_DESCRIPTION("ISDN4Linux: link layer");
40 MODULE_AUTHOR("Fritz Elfert");
41 MODULE_LICENSE("GPL");
45 static DEFINE_MUTEX(isdn_mutex);
46 static char *isdn_revision = "$Revision: 1.1.2.3 $";
48 extern char *isdn_net_revision;
49 extern char *isdn_tty_revision;
50 #ifdef CONFIG_ISDN_PPP
51 extern char *isdn_ppp_revision;
53 static char *isdn_ppp_revision = ": none $";
55 #ifdef CONFIG_ISDN_AUDIO
56 extern char *isdn_audio_revision;
58 static char *isdn_audio_revision = ": none $";
60 extern char *isdn_v110_revision;
62 #ifdef CONFIG_ISDN_DIVERSION
63 static isdn_divert_if *divert_if; /* = NULL */
64 #endif /* CONFIG_ISDN_DIVERSION */
67 static int isdn_writebuf_stub(int, int, const u_char __user *, int);
68 static void set_global_features(void);
69 static int isdn_wildmat(char *s, char *p);
70 static int isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding);
73 isdn_lock_driver(isdn_driver_t *drv)
75 try_module_get(drv->interface->owner);
80 isdn_lock_drivers(void)
84 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
87 isdn_lock_driver(dev->drv[i]);
92 isdn_unlock_driver(isdn_driver_t *drv)
96 module_put(drv->interface->owner);
101 isdn_unlock_drivers(void)
105 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
108 isdn_unlock_driver(dev->drv[i]);
112 #if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP)
114 isdn_dumppkt(char *s, u_char *p, int len, int dumplen)
118 printk(KERN_DEBUG "%s(%d) ", s, len);
119 for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++)
120 printk(" %02x", *p++);
126 * I picked the pattern-matching-functions from an old GNU-tar version (1.10)
127 * It was originally written and put to PD by rs@mirror.TMC.COM (Rich Salz)
130 isdn_star(char *s, char *p)
132 while (isdn_wildmat(s, p)) {
140 * Shell-type Pattern-matching for incoming caller-Ids
141 * This function gets a string in s and checks, if it matches the pattern
147 * 2 = no match. Would eventually match, if s would be longer.
151 * '?' matches one character
152 * '*' matches zero or more characters
153 * [xyz] matches the set of characters in brackets.
154 * [^xyz] matches any single character not in the set of characters
158 isdn_wildmat(char *s, char *p)
161 register int matched;
162 register int reverse;
163 register int nostar = 1;
171 * Literal match with following character,
177 return (*s == '\0') ? 2 : 1;
180 /* Match anything. */
186 /* Trailing star matches everything. */
187 return (*++p ? isdn_star(s, p) : 0);
189 /* [^....] means inverse character class. */
190 if ((reverse = (p[1] == '^')))
192 for (last = 0, matched = 0; *++p && (*p != ']'); last = *p)
193 /* This next line requires a good C compiler. */
194 if (*p == '-' ? *s <= *++p && *s >= last : *s == *p)
196 if (matched == reverse)
200 return (*s == '\0') ? 0 : nostar;
203 int isdn_msncmp(const char *msn1, const char *msn2)
205 char TmpMsn1[ISDN_MSNLEN];
206 char TmpMsn2[ISDN_MSNLEN];
209 for (p = TmpMsn1; *msn1 && *msn1 != ':';) // Strip off a SPID
213 for (p = TmpMsn2; *msn2 && *msn2 != ':';) // Strip off a SPID
217 return isdn_wildmat(TmpMsn1, TmpMsn2);
221 isdn_dc2minor(int di, int ch)
224 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
225 if (dev->chanmap[i] == ch && dev->drvmap[i] == di)
230 static int isdn_timer_cnt1 = 0;
231 static int isdn_timer_cnt2 = 0;
232 static int isdn_timer_cnt3 = 0;
235 isdn_timer_funct(ulong dummy)
237 int tf = dev->tflags;
238 if (tf & ISDN_TIMER_FAST) {
239 if (tf & ISDN_TIMER_MODEMREAD)
240 isdn_tty_readmodem();
241 if (tf & ISDN_TIMER_MODEMPLUS)
242 isdn_tty_modem_escape();
243 if (tf & ISDN_TIMER_MODEMXMIT)
244 isdn_tty_modem_xmit();
246 if (tf & ISDN_TIMER_SLOW) {
247 if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) {
249 if (tf & ISDN_TIMER_NETDIAL)
252 if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
254 if (tf & ISDN_TIMER_NETHANGUP)
256 if (++isdn_timer_cnt3 >= ISDN_TIMER_RINGING) {
258 if (tf & ISDN_TIMER_MODEMRING)
259 isdn_tty_modem_ring();
261 if (tf & ISDN_TIMER_CARRIER)
262 isdn_tty_carrier_timeout();
266 mod_timer(&dev->timer, jiffies + ISDN_TIMER_RES);
270 isdn_timer_ctrl(int tf, int onoff)
275 spin_lock_irqsave(&dev->timerlock, flags);
276 if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) {
277 /* If the slow-timer wasn't activated until now */
281 old_tflags = dev->tflags;
286 if (dev->tflags && !old_tflags)
287 mod_timer(&dev->timer, jiffies + ISDN_TIMER_RES);
288 spin_unlock_irqrestore(&dev->timerlock, flags);
292 * Receive a packet from B-Channel. (Called from low-level-module)
295 isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb)
299 if ((i = isdn_dc2minor(di, channel)) == -1) {
303 /* Update statistics */
304 dev->ibytes[i] += skb->len;
306 /* First, try to deliver data to network-device */
307 if (isdn_net_rcv_skb(i, skb))
311 * makes sense for async streams only, so it is
312 * called after possible net-device delivery.
315 atomic_inc(&dev->v110use[i]);
316 skb = isdn_v110_decode(dev->v110[i], skb);
317 atomic_dec(&dev->v110use[i]);
322 /* No network-device found, deliver to tty or raw-channel */
324 if (isdn_tty_rcv_skb(i, di, channel, skb))
326 wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]);
332 * Intercept command from Linklevel to Lowlevel.
333 * If layer 2 protocol is V.110 and this is not supported by current
334 * lowlevel-driver, use driver's transparent mode and handle V.110 in
338 isdn_command(isdn_ctrl *cmd)
340 if (cmd->driver == -1) {
341 printk(KERN_WARNING "isdn_command command(%x) driver -1\n", cmd->command);
344 if (!dev->drv[cmd->driver]) {
345 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d] NULL\n",
346 cmd->command, cmd->driver);
349 if (!dev->drv[cmd->driver]->interface) {
350 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d]->interface NULL\n",
351 cmd->command, cmd->driver);
354 if (cmd->command == ISDN_CMD_SETL2) {
355 int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255);
356 unsigned long l2prot = (cmd->arg >> 8) & 255;
357 unsigned long features = (dev->drv[cmd->driver]->interface->features
358 >> ISDN_FEATURE_L2_SHIFT) &
359 ISDN_FEATURE_L2_MASK;
360 unsigned long l2_feature = (1 << l2prot);
363 case ISDN_PROTO_L2_V11096:
364 case ISDN_PROTO_L2_V11019:
365 case ISDN_PROTO_L2_V11038:
366 /* If V.110 requested, but not supported by
367 * HL-driver, set emulator-flag and change
368 * Layer-2 to transparent
370 if (!(features & l2_feature)) {
371 dev->v110emu[idx] = l2prot;
372 cmd->arg = (cmd->arg & 255) |
373 (ISDN_PROTO_L2_TRANS << 8);
375 dev->v110emu[idx] = 0;
378 return dev->drv[cmd->driver]->interface->command(cmd);
382 isdn_all_eaz(int di, int ch)
390 cmd.command = ISDN_CMD_SETEAZ;
391 cmd.parm.num[0] = '\0';
396 * Begin of a CAPI like LL<->HL interface, currently used only for
397 * supplementary service (CAPI 2.0 part III)
399 #include <linux/isdn/capicmd.h>
402 isdn_capi_rec_hl_msg(capi_msg *cm)
404 switch (cm->Command) {
406 /* in the moment only handled in tty */
407 return (isdn_tty_capi_facility(cm));
414 isdn_status_callback(isdn_ctrl *c)
425 i = isdn_dc2minor(di, c->arg);
426 switch (c->command) {
427 case ISDN_STAT_BSENT:
430 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
432 if (isdn_net_stat_callback(i, c))
434 if (isdn_v110_stat_callback(i, c))
436 if (isdn_tty_stat_callback(i, c))
438 wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
440 case ISDN_STAT_STAVAIL:
441 dev->drv[di]->stavail += c->arg;
442 wake_up_interruptible(&dev->drv[di]->st_waitq);
445 dev->drv[di]->flags |= DRV_FLAG_RUNNING;
446 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
447 if (dev->drvmap[i] == di)
448 isdn_all_eaz(di, dev->chanmap[i]);
449 set_global_features();
452 dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
454 case ISDN_STAT_ICALL:
457 #ifdef ISDN_DEBUG_STATCALLB
458 printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
460 if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
463 cmd.command = ISDN_CMD_HANGUP;
467 /* Try to find a network-interface which will accept incoming call */
468 r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
471 /* No network-device replies.
473 * These return 0 on no match, 1 on match and
474 * 3 on eventually match, if CID is longer.
476 if (c->command == ISDN_STAT_ICALL)
477 if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return (retval);
478 #ifdef CONFIG_ISDN_DIVERSION
480 if ((retval = divert_if->stat_callback(c)))
481 return (retval); /* processed */
482 #endif /* CONFIG_ISDN_DIVERSION */
483 if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
484 /* No tty responding */
487 cmd.command = ISDN_CMD_HANGUP;
493 /* Schedule connection-setup */
497 cmd.command = ISDN_CMD_ACCEPTD;
498 for (p = dev->netdev; p; p = p->next)
499 if (p->local->isdn_channel == cmd.arg)
501 strcpy(cmd.parm.setup.eazmsn, p->local->msn);
508 case 2: /* For calling back, first reject incoming call ... */
509 case 3: /* Interface found, but down, reject call actively */
511 printk(KERN_INFO "isdn: Rejecting Call\n");
514 cmd.command = ISDN_CMD_HANGUP;
520 /* ... then start callback. */
524 /* Number would eventually match, if longer */
528 #ifdef ISDN_DEBUG_STATCALLB
529 printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
536 #ifdef ISDN_DEBUG_STATCALLB
537 printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
539 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
541 if (strcmp(c->parm.num, "0"))
542 isdn_net_stat_callback(i, c);
543 isdn_tty_stat_callback(i, c);
545 case ISDN_STAT_CAUSE:
546 #ifdef ISDN_DEBUG_STATCALLB
547 printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
549 printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
550 dev->drvid[di], c->arg, c->parm.num);
551 isdn_tty_stat_callback(i, c);
552 #ifdef CONFIG_ISDN_DIVERSION
554 divert_if->stat_callback(c);
555 #endif /* CONFIG_ISDN_DIVERSION */
557 case ISDN_STAT_DISPLAY:
558 #ifdef ISDN_DEBUG_STATCALLB
559 printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
561 isdn_tty_stat_callback(i, c);
562 #ifdef CONFIG_ISDN_DIVERSION
564 divert_if->stat_callback(c);
565 #endif /* CONFIG_ISDN_DIVERSION */
567 case ISDN_STAT_DCONN:
570 #ifdef ISDN_DEBUG_STATCALLB
571 printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
573 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
575 /* Find any net-device, waiting for D-channel setup */
576 if (isdn_net_stat_callback(i, c))
578 isdn_v110_stat_callback(i, c);
579 /* Find any ttyI, waiting for D-channel setup */
580 if (isdn_tty_stat_callback(i, c)) {
583 cmd.command = ISDN_CMD_ACCEPTB;
591 #ifdef ISDN_DEBUG_STATCALLB
592 printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
594 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
596 dev->drv[di]->online &= ~(1 << (c->arg));
598 /* Signal hangup to network-devices */
599 if (isdn_net_stat_callback(i, c))
601 isdn_v110_stat_callback(i, c);
602 if (isdn_tty_stat_callback(i, c))
604 #ifdef CONFIG_ISDN_DIVERSION
606 divert_if->stat_callback(c);
607 #endif /* CONFIG_ISDN_DIVERSION */
610 case ISDN_STAT_BCONN:
613 #ifdef ISDN_DEBUG_STATCALLB
614 printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
616 /* Signal B-channel-connect to network-devices */
617 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
619 dev->drv[di]->online |= (1 << (c->arg));
621 if (isdn_net_stat_callback(i, c))
623 isdn_v110_stat_callback(i, c);
624 if (isdn_tty_stat_callback(i, c))
630 #ifdef ISDN_DEBUG_STATCALLB
631 printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
633 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
635 dev->drv[di]->online &= ~(1 << (c->arg));
637 #ifdef CONFIG_ISDN_X25
638 /* Signal hangup to network-devices */
639 if (isdn_net_stat_callback(i, c))
642 isdn_v110_stat_callback(i, c);
643 if (isdn_tty_stat_callback(i, c))
646 case ISDN_STAT_NODCH:
649 #ifdef ISDN_DEBUG_STATCALLB
650 printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
652 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
654 if (isdn_net_stat_callback(i, c))
656 if (isdn_tty_stat_callback(i, c))
659 case ISDN_STAT_ADDCH:
660 spin_lock_irqsave(&dev->lock, flags);
661 if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) {
662 spin_unlock_irqrestore(&dev->lock, flags);
665 spin_unlock_irqrestore(&dev->lock, flags);
668 case ISDN_STAT_DISCH:
669 spin_lock_irqsave(&dev->lock, flags);
670 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
671 if ((dev->drvmap[i] == di) &&
672 (dev->chanmap[i] == c->arg)) {
674 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
676 if (USG_NONE(dev->usage[i])) {
677 dev->usage[i] |= ISDN_USAGE_DISABLED;
683 spin_unlock_irqrestore(&dev->lock, flags);
686 case ISDN_STAT_UNLOAD:
687 while (dev->drv[di]->locks > 0) {
688 isdn_unlock_driver(dev->drv[di]);
690 spin_lock_irqsave(&dev->lock, flags);
691 isdn_tty_stat_callback(i, c);
692 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
693 if (dev->drvmap[i] == di) {
695 dev->chanmap[i] = -1;
696 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
699 dev->channels -= dev->drv[di]->channels;
700 kfree(dev->drv[di]->rcverr);
701 kfree(dev->drv[di]->rcvcount);
702 for (i = 0; i < dev->drv[di]->channels; i++)
703 skb_queue_purge(&dev->drv[di]->rpqueue[i]);
704 kfree(dev->drv[di]->rpqueue);
705 kfree(dev->drv[di]->rcv_waitq);
708 dev->drvid[di][0] = '\0';
710 set_global_features();
711 spin_unlock_irqrestore(&dev->lock, flags);
713 case ISDN_STAT_L1ERR:
715 case CAPI_PUT_MESSAGE:
716 return (isdn_capi_rec_hl_msg(&c->parm.cmsg));
717 #ifdef CONFIG_ISDN_TTY_FAX
718 case ISDN_STAT_FAXIND:
719 isdn_tty_stat_callback(i, c);
722 #ifdef CONFIG_ISDN_AUDIO
723 case ISDN_STAT_AUDIO:
724 isdn_tty_stat_callback(i, c);
727 #ifdef CONFIG_ISDN_DIVERSION
729 case ISDN_STAT_REDIR:
731 return (divert_if->stat_callback(c));
732 #endif /* CONFIG_ISDN_DIVERSION */
740 * Get integer from char-pointer, set pointer to end of number
743 isdn_getnum(char **p)
747 while (*p[0] >= '0' && *p[0] <= '9')
748 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
755 * isdn_readbchan() tries to get data from the read-queue.
756 * It MUST be called with interrupts off.
758 * Be aware that this is not an atomic operation when sleep != 0, even though
759 * interrupts are turned off! Well, like that we are currently only called
760 * on behalf of a read system call on raw device files (which are documented
761 * to be dangerous and for debugging purpose only). The inode semaphore
762 * takes care that this is not called for the same minor device number while
763 * we are sleeping, but access is not serialized against simultaneous read()
764 * from the corresponding ttyI device. Can other ugly events, like changes
765 * of the mapping (di,ch)<->minor, happen during the sleep? --he
768 isdn_readbchan(int di, int channel, u_char *buf, u_char *fp, int len, wait_queue_head_t *sleep)
779 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
781 interruptible_sleep_on(sleep);
785 if (len > dev->drv[di]->rcvcount[channel])
786 len = dev->drv[di]->rcvcount[channel];
790 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
792 #ifdef CONFIG_ISDN_AUDIO
793 if (ISDN_AUDIO_SKB_LOCK(skb))
795 ISDN_AUDIO_SKB_LOCK(skb) = 1;
796 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
798 unsigned long DLEmask = (1 << channel);
801 count_pull = count_put = 0;
802 while ((count_pull < skb->len) && (len > 0)) {
804 if (dev->drv[di]->DLEflag & DLEmask) {
806 dev->drv[di]->DLEflag &= ~DLEmask;
810 dev->drv[di]->DLEflag |= DLEmask;
811 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
818 if (count_pull >= skb->len)
822 /* No DLE's in buff, so simply copy it */
824 if ((count_pull = skb->len) > len) {
828 count_put = count_pull;
829 skb_copy_from_linear_data(skb, cp, count_put);
832 #ifdef CONFIG_ISDN_AUDIO
837 memset(fp, 0, count_put);
841 /* We got all the data in this buff.
842 * Now we can dequeue it.
846 #ifdef CONFIG_ISDN_AUDIO
847 ISDN_AUDIO_SKB_LOCK(skb) = 0;
849 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
852 /* Not yet emptied this buff, so it
853 * must stay in the queue, for further calls
854 * but we pull off the data we got until now.
856 skb_pull(skb, count_pull);
857 #ifdef CONFIG_ISDN_AUDIO
858 ISDN_AUDIO_SKB_LOCK(skb) = 0;
861 dev->drv[di]->rcvcount[channel] -= count_put;
867 * isdn_readbchan_tty() tries to get data from the read-queue.
868 * It MUST be called with interrupts off.
870 * Be aware that this is not an atomic operation when sleep != 0, even though
871 * interrupts are turned off! Well, like that we are currently only called
872 * on behalf of a read system call on raw device files (which are documented
873 * to be dangerous and for debugging purpose only). The inode semaphore
874 * takes care that this is not called for the same minor device number while
875 * we are sleeping, but access is not serialized against simultaneous read()
876 * from the corresponding ttyI device. Can other ugly events, like changes
877 * of the mapping (di,ch)<->minor, happen during the sleep? --he
880 isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
892 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
895 len = tty_buffer_request_room(tty, dev->drv[di]->rcvcount[channel]);
901 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
903 #ifdef CONFIG_ISDN_AUDIO
904 if (ISDN_AUDIO_SKB_LOCK(skb))
906 ISDN_AUDIO_SKB_LOCK(skb) = 1;
907 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
909 unsigned long DLEmask = (1 << channel);
912 count_pull = count_put = 0;
913 while ((count_pull < skb->len) && (len > 0)) {
914 /* push every character but the last to the tty buffer directly */
916 tty_insert_flip_char(tty, last, TTY_NORMAL);
918 if (dev->drv[di]->DLEflag & DLEmask) {
920 dev->drv[di]->DLEflag &= ~DLEmask;
924 dev->drv[di]->DLEflag |= DLEmask;
925 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
932 if (count_pull >= skb->len)
936 /* No DLE's in buff, so simply copy it */
938 if ((count_pull = skb->len) > len) {
942 count_put = count_pull;
944 tty_insert_flip_string(tty, skb->data, count_put - 1);
945 last = skb->data[count_put - 1];
947 #ifdef CONFIG_ISDN_AUDIO
952 /* We got all the data in this buff.
953 * Now we can dequeue it.
956 tty_insert_flip_char(tty, last, 0xFF);
958 tty_insert_flip_char(tty, last, TTY_NORMAL);
959 #ifdef CONFIG_ISDN_AUDIO
960 ISDN_AUDIO_SKB_LOCK(skb) = 0;
962 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
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.
970 skb_pull(skb, count_pull);
971 #ifdef CONFIG_ISDN_AUDIO
972 ISDN_AUDIO_SKB_LOCK(skb) = 0;
975 dev->drv[di]->rcvcount[channel] -= count_put;
982 isdn_minor2drv(int minor)
984 return (dev->drvmap[minor]);
988 isdn_minor2chan(int minor)
990 return (dev->chanmap[minor]);
996 static char istatbuf[2048];
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);
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);
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);
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);
1024 sprintf(p, "\nflags:\t");
1025 p = istatbuf + strlen(istatbuf);
1026 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
1028 sprintf(p, "%ld ", dev->drv[i]->online);
1029 p = istatbuf + strlen(istatbuf);
1032 p = istatbuf + strlen(istatbuf);
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);
1045 /* Module interface-code */
1048 isdn_info_update(void)
1050 infostruct *p = dev->infochain;
1054 p = (infostruct *) p->next;
1056 wake_up_interruptible(&(dev->info_waitq));
1060 isdn_read(struct file *file, char __user *buf, size_t count, loff_t *off)
1062 uint minor = iminor(file->f_path.dentry->d_inode);
1069 mutex_lock(&isdn_mutex);
1070 if (minor == ISDN_MINOR_STATUS) {
1071 if (!file->private_data) {
1072 if (file->f_flags & O_NONBLOCK) {
1076 interruptible_sleep_on(&(dev->info_waitq));
1079 file->private_data = NULL;
1080 if ((len = strlen(p)) <= count) {
1081 if (copy_to_user(buf, p, len)) {
1092 if (!dev->drivers) {
1096 if (minor <= ISDN_MINOR_BMAX) {
1097 printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
1098 drvidx = isdn_minor2drv(minor);
1103 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1107 chidx = isdn_minor2chan(minor);
1108 if (!(p = kmalloc(count, GFP_KERNEL))) {
1112 len = isdn_readbchan(drvidx, chidx, p, NULL, count,
1113 &dev->drv[drvidx]->rcv_waitq[chidx]);
1115 if (copy_to_user(buf, p, len))
1121 if (minor <= ISDN_MINOR_CTRLMAX) {
1122 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1127 if (!dev->drv[drvidx]->stavail) {
1128 if (file->f_flags & O_NONBLOCK) {
1132 interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
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 - ISDN_MINOR_CTRL));
1147 dev->drv[drvidx]->stavail -= len;
1149 dev->drv[drvidx]->stavail = 0;
1154 #ifdef CONFIG_ISDN_PPP
1155 if (minor <= ISDN_MINOR_PPPMAX) {
1156 retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
1162 mutex_unlock(&isdn_mutex);
1167 isdn_write(struct file *file, const char __user *buf, size_t count, loff_t *off)
1169 uint minor = iminor(file->f_path.dentry->d_inode);
1174 if (minor == ISDN_MINOR_STATUS)
1179 mutex_lock(&isdn_mutex);
1180 if (minor <= ISDN_MINOR_BMAX) {
1181 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
1182 drvidx = isdn_minor2drv(minor);
1187 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
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]);
1196 if (minor <= ISDN_MINOR_CTRLMAX) {
1197 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1203 * We want to use the isdnctrl device to load the firmware
1205 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1208 if (dev->drv[drvidx]->interface->writecmd)
1209 retval = dev->drv[drvidx]->interface->
1210 writecmd(buf, count, drvidx,
1211 isdn_minor2chan(minor - ISDN_MINOR_CTRL));
1216 #ifdef CONFIG_ISDN_PPP
1217 if (minor <= ISDN_MINOR_PPPMAX) {
1218 retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
1224 mutex_unlock(&isdn_mutex);
1229 isdn_poll(struct file *file, poll_table *wait)
1231 unsigned int mask = 0;
1232 unsigned int minor = iminor(file->f_path.dentry->d_inode);
1233 int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1235 mutex_lock(&isdn_mutex);
1236 if (minor == ISDN_MINOR_STATUS) {
1237 poll_wait(file, &(dev->info_waitq), wait);
1238 /* mask = POLLOUT | POLLWRNORM; */
1239 if (file->private_data) {
1240 mask |= POLLIN | POLLRDNORM;
1244 if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1246 /* driver deregistered while file open */
1250 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1251 mask = POLLOUT | POLLWRNORM;
1252 if (dev->drv[drvidx]->stavail) {
1253 mask |= POLLIN | POLLRDNORM;
1257 #ifdef CONFIG_ISDN_PPP
1258 if (minor <= ISDN_MINOR_PPPMAX) {
1259 mask = isdn_ppp_poll(file, wait);
1265 mutex_unlock(&isdn_mutex);
1271 isdn_ioctl(struct file *file, uint cmd, ulong arg)
1273 uint minor = iminor(file->f_path.dentry->d_inode);
1283 isdn_ioctl_struct iocts;
1284 isdn_net_ioctl_phone phone;
1285 isdn_net_ioctl_cfg cfg;
1287 void __user *argp = (void __user *)arg;
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
1295 if (minor == ISDN_MINOR_STATUS) {
1303 ulong __user *p = argp;
1305 if (!access_ok(VERIFY_WRITE, p,
1306 sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1308 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1309 put_user(dev->ibytes[i], p++);
1310 put_user(dev->obytes[i], p++);
1316 #ifdef CONFIG_NETDEVICES
1318 /* Get peer phone number of a connected
1319 * isdn network interface */
1321 if (copy_from_user(&phone, argp, sizeof(phone)))
1323 return isdn_net_getpeer(&phone, argp);
1333 if (minor <= ISDN_MINOR_BMAX) {
1334 drvidx = isdn_minor2drv(minor);
1337 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1341 if (minor <= ISDN_MINOR_CTRLMAX) {
1343 * isdn net devices manage lots of configuration variables as linked lists.
1344 * Those lists must only be manipulated from user space. Some of the ioctl's
1345 * service routines access user space and are not atomic. Therefore, ioctl's
1346 * manipulating the lists and ioctl's sleeping while accessing the lists
1347 * are serialized by means of a semaphore.
1351 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1354 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1356 #ifdef CONFIG_NETDEVICES
1358 /* Add a network-interface */
1360 if (copy_from_user(name, argp, sizeof(name)))
1366 ret = mutex_lock_interruptible(&dev->mtx);
1367 if (ret) return ret;
1368 if ((s = isdn_net_new(s, NULL))) {
1369 if (copy_to_user(argp, s, strlen(s) + 1)) {
1376 mutex_unlock(&dev->mtx);
1379 /* Add a slave to a network-interface */
1381 if (copy_from_user(bname, argp, sizeof(bname) - 1))
1385 ret = mutex_lock_interruptible(&dev->mtx);
1386 if (ret) return ret;
1387 if ((s = isdn_net_newslave(bname))) {
1388 if (copy_to_user(argp, s, strlen(s) + 1)) {
1395 mutex_unlock(&dev->mtx);
1398 /* Delete a network-interface */
1400 if (copy_from_user(name, argp, sizeof(name)))
1402 ret = mutex_lock_interruptible(&dev->mtx);
1403 if (ret) return ret;
1404 ret = isdn_net_rm(name);
1405 mutex_unlock(&dev->mtx);
1410 /* Set configurable parameters of a network-interface */
1412 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1414 return isdn_net_setcfg(&cfg);
1418 /* Get configurable parameters of a network-interface */
1420 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1422 if (!(ret = isdn_net_getcfg(&cfg))) {
1423 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1430 /* Add a phone-number to a network-interface */
1432 if (copy_from_user(&phone, argp, sizeof(phone)))
1434 ret = mutex_lock_interruptible(&dev->mtx);
1435 if (ret) return ret;
1436 ret = isdn_net_addphone(&phone);
1437 mutex_unlock(&dev->mtx);
1442 /* Get list of phone-numbers of a network-interface */
1444 if (copy_from_user(&phone, argp, sizeof(phone)))
1446 ret = mutex_lock_interruptible(&dev->mtx);
1447 if (ret) return ret;
1448 ret = isdn_net_getphones(&phone, argp);
1449 mutex_unlock(&dev->mtx);
1454 /* Delete a phone-number of a network-interface */
1456 if (copy_from_user(&phone, argp, sizeof(phone)))
1458 ret = mutex_lock_interruptible(&dev->mtx);
1459 if (ret) return ret;
1460 ret = isdn_net_delphone(&phone);
1461 mutex_unlock(&dev->mtx);
1466 /* Force dialing of a network-interface */
1468 if (copy_from_user(name, argp, sizeof(name)))
1470 return isdn_net_force_dial(name);
1473 #ifdef CONFIG_ISDN_PPP
1477 if (copy_from_user(name, argp, sizeof(name)))
1479 return isdn_ppp_dial_slave(name);
1483 if (copy_from_user(name, argp, sizeof(name)))
1485 return isdn_ppp_hangup_slave(name);
1488 /* Force hangup of a network-interface */
1491 if (copy_from_user(name, argp, sizeof(name)))
1493 return isdn_net_force_hangup(name);
1495 #endif /* CONFIG_NETDEVICES */
1497 dev->net_verbose = arg;
1498 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1502 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1504 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1505 printk(KERN_INFO "isdn: Global Mode %s\n",
1506 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1513 if (copy_from_user(&iocts, argp,
1514 sizeof(isdn_ioctl_struct)))
1516 iocts.drvid[sizeof(iocts.drvid) - 1] = 0;
1517 if (strlen(iocts.drvid)) {
1518 if ((p = strchr(iocts.drvid, ',')))
1521 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1522 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1531 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1533 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1536 dev->profd = current;
1540 /* Get all Modem-Profiles */
1542 char __user *p = argp;
1545 if (!access_ok(VERIFY_WRITE, argp,
1546 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1547 * ISDN_MAX_CHANNELS))
1550 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1551 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1554 p += ISDN_MODEM_NUMREG;
1555 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1558 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1562 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1567 /* Set all Modem-Profiles */
1569 char __user *p = argp;
1572 if (!access_ok(VERIFY_READ, argp,
1573 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1574 * ISDN_MAX_CHANNELS))
1577 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1578 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1581 p += ISDN_MODEM_NUMREG;
1582 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1585 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1595 /* Set/Get MSN->EAZ-Mapping for a driver */
1598 if (copy_from_user(&iocts, argp,
1599 sizeof(isdn_ioctl_struct)))
1601 iocts.drvid[sizeof(iocts.drvid) - 1] = 0;
1602 if (strlen(iocts.drvid)) {
1604 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1605 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1613 if (cmd == IIOCSETMAP) {
1616 p = (char __user *) iocts.arg;
1622 if (!access_ok(VERIFY_READ, p, 1))
1624 get_user(bname[j], p++);
1631 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1637 if (j >= ISDN_MSNLEN)
1644 p = (char __user *) iocts.arg;
1645 for (i = 0; i < 10; i++) {
1646 snprintf(bname, sizeof(bname), "%s%s",
1647 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1648 dev->drv[drvidx]->msn2eaz[i] : "_",
1649 (i < 9) ? "," : "\0");
1650 if (copy_to_user(p, bname, strlen(bname) + 1))
1660 if (copy_to_user(argp, &dev, sizeof(ulong)))
1667 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1668 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1674 if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
1676 iocts.drvid[sizeof(iocts.drvid) - 1] = 0;
1677 if (strlen(iocts.drvid)) {
1678 if ((p = strchr(iocts.drvid, ',')))
1681 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1682 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1690 if (!access_ok(VERIFY_WRITE, argp,
1691 sizeof(isdn_ioctl_struct)))
1694 c.command = ISDN_CMD_IOCTL;
1696 memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1697 ret = isdn_command(&c);
1698 memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1699 if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1706 #ifdef CONFIG_ISDN_PPP
1707 if (minor <= ISDN_MINOR_PPPMAX)
1708 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1720 isdn_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1724 mutex_lock(&isdn_mutex);
1725 ret = isdn_ioctl(file, cmd, arg);
1726 mutex_unlock(&isdn_mutex);
1732 * Open the device code.
1735 isdn_open(struct inode *ino, struct file *filep)
1737 uint minor = iminor(ino);
1740 int retval = -ENODEV;
1742 mutex_lock(&isdn_mutex);
1743 if (minor == ISDN_MINOR_STATUS) {
1746 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1747 p->next = (char *) dev->infochain;
1748 p->private = (char *) &(filep->private_data);
1750 /* At opening we allow a single update */
1751 filep->private_data = (char *) 1;
1761 if (minor <= ISDN_MINOR_BMAX) {
1762 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1763 drvidx = isdn_minor2drv(minor);
1766 chidx = isdn_minor2chan(minor);
1767 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1769 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1771 isdn_lock_drivers();
1775 if (minor <= ISDN_MINOR_CTRLMAX) {
1776 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1779 isdn_lock_drivers();
1783 #ifdef CONFIG_ISDN_PPP
1784 if (minor <= ISDN_MINOR_PPPMAX) {
1785 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1787 isdn_lock_drivers();
1792 nonseekable_open(ino, filep);
1793 mutex_unlock(&isdn_mutex);
1798 isdn_close(struct inode *ino, struct file *filep)
1800 uint minor = iminor(ino);
1802 mutex_lock(&isdn_mutex);
1803 if (minor == ISDN_MINOR_STATUS) {
1804 infostruct *p = dev->infochain;
1805 infostruct *q = NULL;
1808 if (p->private == (char *) &(filep->private_data)) {
1812 dev->infochain = (infostruct *) (p->next);
1817 p = (infostruct *) (p->next);
1819 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1822 isdn_unlock_drivers();
1823 if (minor <= ISDN_MINOR_BMAX)
1825 if (minor <= ISDN_MINOR_CTRLMAX) {
1826 if (dev->profd == current)
1830 #ifdef CONFIG_ISDN_PPP
1831 if (minor <= ISDN_MINOR_PPPMAX)
1832 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1836 mutex_unlock(&isdn_mutex);
1840 static const struct file_operations isdn_fops =
1842 .owner = THIS_MODULE,
1843 .llseek = no_llseek,
1845 .write = isdn_write,
1847 .unlocked_ioctl = isdn_unlocked_ioctl,
1849 .release = isdn_close,
1853 isdn_map_eaz2msn(char *msn, int di)
1855 isdn_driver_t *this = dev->drv[di];
1858 if (strlen(msn) == 1) {
1860 if ((i >= 0) && (i <= 9))
1861 if (strlen(this->msn2eaz[i]))
1862 return (this->msn2eaz[i]);
1868 * Find an unused ISDN-channel, whose feature-flags match the
1869 * given L2- and L3-protocols.
1871 #define L2V (~(ISDN_FEATURE_L2_V11096 | ISDN_FEATURE_L2_V11019 | ISDN_FEATURE_L2_V11038))
1874 * This function must be called with holding the dev->lock.
1877 isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1878 , int pre_chan, char *msn)
1884 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1885 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1886 ~(ISDN_FEATURE_L2_V11096 | ISDN_FEATURE_L2_V11019 | ISDN_FEATURE_L2_V11038));
1887 /* If Layer-2 protocol is V.110, accept drivers with
1888 * transparent feature even if these don't support V.110
1889 * because we can emulate this in linklevel.
1891 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1892 if (USG_NONE(dev->usage[i]) &&
1893 (dev->drvmap[i] != -1)) {
1894 int d = dev->drvmap[i];
1895 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1896 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1898 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1900 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1901 continue; /* usage not allowed */
1902 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1903 if (((dev->drv[d]->interface->features & features) == features) ||
1904 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1905 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1906 if ((pre_dev < 0) || (pre_chan < 0)) {
1907 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1908 dev->usage[i] |= usage;
1912 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1913 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1914 dev->usage[i] |= usage;
1926 * Set state of ISDN-channel to 'unused'
1929 isdn_free_channel(int di, int ch, int usage)
1933 if ((di < 0) || (ch < 0)) {
1934 printk(KERN_WARNING "%s: called with invalid drv(%d) or channel(%d)\n",
1938 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1939 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1940 (dev->drvmap[i] == di) &&
1941 (dev->chanmap[i] == ch)) {
1942 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1943 strcpy(dev->num[i], "???");
1946 // 20.10.99 JIM, try to reinitialize v110 !
1947 dev->v110emu[i] = 0;
1948 atomic_set(&(dev->v110use[i]), 0);
1949 isdn_v110_close(dev->v110[i]);
1950 dev->v110[i] = NULL;
1951 // 20.10.99 JIM, try to reinitialize v110 !
1954 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1959 * Cancel Exclusive-Flag for ISDN-channel
1962 isdn_unexclusive_channel(int di, int ch)
1966 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1967 if ((dev->drvmap[i] == di) &&
1968 (dev->chanmap[i] == ch)) {
1969 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1976 * writebuf replacement for SKB_ABLE drivers
1979 isdn_writebuf_stub(int drvidx, int chan, const u_char __user *buf, int len)
1982 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1983 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1987 skb_reserve(skb, hl);
1988 if (copy_from_user(skb_put(skb, len), buf, len)) {
1992 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
1996 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
2001 * Return: length of data on success, -ERRcode on failure.
2004 isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
2007 struct sk_buff *nskb = NULL;
2008 int v110_ret = skb->len;
2009 int idx = isdn_dc2minor(drvidx, chan);
2011 if (dev->v110[idx]) {
2012 atomic_inc(&dev->v110use[idx]);
2013 nskb = isdn_v110_encode(dev->v110[idx], skb);
2014 atomic_dec(&dev->v110use[idx]);
2017 v110_ret = *((int *)nskb->data);
2018 skb_pull(nskb, sizeof(int));
2020 dev_kfree_skb(nskb);
2023 /* V.110 must always be acknowledged */
2025 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
2027 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
2029 if (skb_headroom(skb) < hl) {
2031 * This should only occur when new HL driver with
2032 * increased hl_hdrlen was loaded after netdevice
2033 * was created and connected to the new driver.
2035 * The V.110 branch (re-allocates on its own) does
2038 struct sk_buff *skb_tmp;
2040 skb_tmp = skb_realloc_headroom(skb, hl);
2041 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
2042 if (!skb_tmp) return -ENOMEM; /* 0 better? */
2043 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
2047 dev_kfree_skb(skb_tmp);
2050 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
2054 dev->obytes[idx] += ret;
2055 if (dev->v110[idx]) {
2056 atomic_inc(&dev->v110use[idx]);
2057 dev->v110[idx]->skbuser++;
2058 atomic_dec(&dev->v110use[idx]);
2059 /* For V.110 return unencoded data length */
2061 /* if the complete frame was send we free the skb;
2062 if not upper function will requeue the skb */
2063 if (ret == skb->len)
2068 dev_kfree_skb(nskb);
2073 isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
2077 init_waitqueue_head(&d->st_waitq);
2078 if (d->flags & DRV_FLAG_RUNNING)
2080 if (n < 1) return 0;
2082 m = (adding) ? d->channels + n : n;
2084 if (dev->channels + n > ISDN_MAX_CHANNELS) {
2085 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2090 if ((adding) && (d->rcverr))
2092 if (!(d->rcverr = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2093 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2097 if ((adding) && (d->rcvcount))
2099 if (!(d->rcvcount = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2100 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
2106 if ((adding) && (d->rpqueue)) {
2107 for (j = 0; j < d->channels; j++)
2108 skb_queue_purge(&d->rpqueue[j]);
2111 if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
2112 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2119 for (j = 0; j < m; j++) {
2120 skb_queue_head_init(&d->rpqueue[j]);
2123 if ((adding) && (d->rcv_waitq))
2124 kfree(d->rcv_waitq);
2125 d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_ATOMIC);
2126 if (!d->rcv_waitq) {
2127 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2135 d->snd_waitq = d->rcv_waitq + m;
2136 for (j = 0; j < m; j++) {
2137 init_waitqueue_head(&d->rcv_waitq[j]);
2138 init_waitqueue_head(&d->snd_waitq[j]);
2142 for (j = d->channels; j < m; j++)
2143 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2144 if (dev->chanmap[k] < 0) {
2145 dev->chanmap[k] = j;
2146 dev->drvmap[k] = drvidx;
2154 * Low-level-driver registration
2158 set_global_features(void)
2162 dev->global_features = 0;
2163 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2164 if (!dev->drv[drvidx])
2166 if (dev->drv[drvidx]->interface)
2167 dev->global_features |= dev->drv[drvidx]->interface->features;
2171 #ifdef CONFIG_ISDN_DIVERSION
2173 static char *map_drvname(int di)
2175 if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2177 return (dev->drvid[di]); /* driver name */
2180 static int map_namedrv(char *id)
2183 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2184 { if (!strcmp(dev->drvid[i], id))
2190 int DIVERT_REG_NAME(isdn_divert_if *i_div)
2192 if (i_div->if_magic != DIVERT_IF_MAGIC)
2193 return (DIVERT_VER_ERR);
2196 case DIVERT_CMD_REL:
2197 if (divert_if != i_div)
2198 return (DIVERT_REL_ERR);
2199 divert_if = NULL; /* free interface */
2200 return (DIVERT_NO_ERR);
2202 case DIVERT_CMD_REG:
2204 return (DIVERT_REG_ERR);
2205 i_div->ll_cmd = isdn_command; /* set command function */
2206 i_div->drv_to_name = map_drvname;
2207 i_div->name_to_drv = map_namedrv;
2208 divert_if = i_div; /* remember interface */
2209 return (DIVERT_NO_ERR);
2212 return (DIVERT_CMD_ERR);
2214 } /* DIVERT_REG_NAME */
2216 EXPORT_SYMBOL(DIVERT_REG_NAME);
2218 #endif /* CONFIG_ISDN_DIVERSION */
2221 EXPORT_SYMBOL(register_isdn);
2222 #ifdef CONFIG_ISDN_PPP
2223 EXPORT_SYMBOL(isdn_ppp_register_compressor);
2224 EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2228 register_isdn(isdn_if *i)
2235 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2236 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2240 if (!i->writebuf_skb) {
2241 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2244 if (!(d = kzalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
2245 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2249 d->maxbufsize = i->maxbufsize;
2252 d->flags = DRV_FLAG_LOADED;
2256 spin_lock_irqsave(&dev->lock, flags);
2257 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2258 if (!dev->drv[drvidx])
2260 if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2261 spin_unlock_irqrestore(&dev->lock, flags);
2265 i->channels = drvidx;
2266 i->rcvcallb_skb = isdn_receive_skb_callback;
2267 i->statcallb = isdn_status_callback;
2269 sprintf(i->id, "line%d", drvidx);
2270 for (j = 0; j < drvidx; j++)
2271 if (!strcmp(i->id, dev->drvid[j]))
2272 sprintf(i->id, "line%d", drvidx);
2273 dev->drv[drvidx] = d;
2274 strcpy(dev->drvid[drvidx], i->id);
2277 set_global_features();
2278 spin_unlock_irqrestore(&dev->lock, flags);
2283 *****************************************************************************
2284 * And now the modules code.
2285 *****************************************************************************
2289 isdn_getrev(const char *revision)
2294 if ((p = strchr(revision, ':'))) {
2296 p = strchr(rev, '$');
2304 * Allocate and initialize all data, register modem-devices
2306 static int __init isdn_init(void)
2311 dev = vzalloc(sizeof(isdn_dev));
2313 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2316 init_timer(&dev->timer);
2317 dev->timer.function = isdn_timer_funct;
2318 spin_lock_init(&dev->lock);
2319 spin_lock_init(&dev->timerlock);
2321 dev->owner = THIS_MODULE;
2323 mutex_init(&dev->mtx);
2324 init_waitqueue_head(&dev->info_waitq);
2325 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2326 dev->drvmap[i] = -1;
2327 dev->chanmap[i] = -1;
2329 strcpy(dev->num[i], "???");
2330 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2331 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2333 if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2334 printk(KERN_WARNING "isdn: Could not register control devices\n");
2338 if ((isdn_tty_modem_init()) < 0) {
2339 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2341 unregister_chrdev(ISDN_MAJOR, "isdn");
2344 #ifdef CONFIG_ISDN_PPP
2345 if (isdn_ppp_init() < 0) {
2346 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2348 unregister_chrdev(ISDN_MAJOR, "isdn");
2352 #endif /* CONFIG_ISDN_PPP */
2354 strcpy(tmprev, isdn_revision);
2355 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2356 strcpy(tmprev, isdn_tty_revision);
2357 printk("%s/", isdn_getrev(tmprev));
2358 strcpy(tmprev, isdn_net_revision);
2359 printk("%s/", isdn_getrev(tmprev));
2360 strcpy(tmprev, isdn_ppp_revision);
2361 printk("%s/", isdn_getrev(tmprev));
2362 strcpy(tmprev, isdn_audio_revision);
2363 printk("%s/", isdn_getrev(tmprev));
2364 strcpy(tmprev, isdn_v110_revision);
2365 printk("%s", isdn_getrev(tmprev));
2368 printk(" loaded\n");
2379 static void __exit isdn_exit(void)
2381 #ifdef CONFIG_ISDN_PPP
2384 if (isdn_net_rmall() < 0) {
2385 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2389 unregister_chrdev(ISDN_MAJOR, "isdn");
2390 del_timer(&dev->timer);
2391 /* call vfree with interrupts enabled, else it will hang */
2393 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2396 module_init(isdn_init);
2397 module_exit(isdn_exit);