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) {
407 di = (cm->adr.Controller & 0x7f) -1;
408 ch = isdn_dc2minor(di, (cm->adr.Controller>>8)& 0x7f);
409 switch(cm->Command) {
411 /* in the moment only handled in tty */
412 return(isdn_tty_capi_facility(cm));
419 isdn_status_callback(isdn_ctrl * c)
430 i = isdn_dc2minor(di, c->arg);
431 switch (c->command) {
432 case ISDN_STAT_BSENT:
435 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
437 if (isdn_net_stat_callback(i, c))
439 if (isdn_v110_stat_callback(i, c))
441 if (isdn_tty_stat_callback(i, c))
443 wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
445 case ISDN_STAT_STAVAIL:
446 dev->drv[di]->stavail += c->arg;
447 wake_up_interruptible(&dev->drv[di]->st_waitq);
450 dev->drv[di]->flags |= DRV_FLAG_RUNNING;
451 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
452 if (dev->drvmap[i] == di)
453 isdn_all_eaz(di, dev->chanmap[i]);
454 set_global_features();
457 dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
459 case ISDN_STAT_ICALL:
462 #ifdef ISDN_DEBUG_STATCALLB
463 printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
465 if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
468 cmd.command = ISDN_CMD_HANGUP;
472 /* Try to find a network-interface which will accept incoming call */
473 r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
476 /* No network-device replies.
478 * These return 0 on no match, 1 on match and
479 * 3 on eventually match, if CID is longer.
481 if (c->command == ISDN_STAT_ICALL)
482 if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return(retval);
483 #ifdef CONFIG_ISDN_DIVERSION
485 if ((retval = divert_if->stat_callback(c)))
486 return(retval); /* processed */
487 #endif /* CONFIG_ISDN_DIVERSION */
488 if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
489 /* No tty responding */
492 cmd.command = ISDN_CMD_HANGUP;
498 /* Schedule connection-setup */
502 cmd.command = ISDN_CMD_ACCEPTD;
503 for ( p = dev->netdev; p; p = p->next )
504 if ( p->local->isdn_channel == cmd.arg )
506 strcpy( cmd.parm.setup.eazmsn, p->local->msn );
513 case 2: /* For calling back, first reject incoming call ... */
514 case 3: /* Interface found, but down, reject call actively */
516 printk(KERN_INFO "isdn: Rejecting Call\n");
519 cmd.command = ISDN_CMD_HANGUP;
525 /* ... then start callback. */
529 /* Number would eventually match, if longer */
533 #ifdef ISDN_DEBUG_STATCALLB
534 printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
541 #ifdef ISDN_DEBUG_STATCALLB
542 printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
544 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
546 if (strcmp(c->parm.num, "0"))
547 isdn_net_stat_callback(i, c);
548 isdn_tty_stat_callback(i, c);
550 case ISDN_STAT_CAUSE:
551 #ifdef ISDN_DEBUG_STATCALLB
552 printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
554 printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
555 dev->drvid[di], c->arg, c->parm.num);
556 isdn_tty_stat_callback(i, c);
557 #ifdef CONFIG_ISDN_DIVERSION
559 divert_if->stat_callback(c);
560 #endif /* CONFIG_ISDN_DIVERSION */
562 case ISDN_STAT_DISPLAY:
563 #ifdef ISDN_DEBUG_STATCALLB
564 printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
566 isdn_tty_stat_callback(i, c);
567 #ifdef CONFIG_ISDN_DIVERSION
569 divert_if->stat_callback(c);
570 #endif /* CONFIG_ISDN_DIVERSION */
572 case ISDN_STAT_DCONN:
575 #ifdef ISDN_DEBUG_STATCALLB
576 printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
578 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
580 /* Find any net-device, waiting for D-channel setup */
581 if (isdn_net_stat_callback(i, c))
583 isdn_v110_stat_callback(i, c);
584 /* Find any ttyI, waiting for D-channel setup */
585 if (isdn_tty_stat_callback(i, c)) {
588 cmd.command = ISDN_CMD_ACCEPTB;
596 #ifdef ISDN_DEBUG_STATCALLB
597 printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
599 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
601 dev->drv[di]->online &= ~(1 << (c->arg));
603 /* Signal hangup to network-devices */
604 if (isdn_net_stat_callback(i, c))
606 isdn_v110_stat_callback(i, c);
607 if (isdn_tty_stat_callback(i, c))
609 #ifdef CONFIG_ISDN_DIVERSION
611 divert_if->stat_callback(c);
612 #endif /* CONFIG_ISDN_DIVERSION */
615 case ISDN_STAT_BCONN:
618 #ifdef ISDN_DEBUG_STATCALLB
619 printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
621 /* Signal B-channel-connect to network-devices */
622 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
624 dev->drv[di]->online |= (1 << (c->arg));
626 if (isdn_net_stat_callback(i, c))
628 isdn_v110_stat_callback(i, c);
629 if (isdn_tty_stat_callback(i, c))
635 #ifdef ISDN_DEBUG_STATCALLB
636 printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
638 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
640 dev->drv[di]->online &= ~(1 << (c->arg));
642 #ifdef CONFIG_ISDN_X25
643 /* Signal hangup to network-devices */
644 if (isdn_net_stat_callback(i, c))
647 isdn_v110_stat_callback(i, c);
648 if (isdn_tty_stat_callback(i, c))
651 case ISDN_STAT_NODCH:
654 #ifdef ISDN_DEBUG_STATCALLB
655 printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
657 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
659 if (isdn_net_stat_callback(i, c))
661 if (isdn_tty_stat_callback(i, c))
664 case ISDN_STAT_ADDCH:
665 spin_lock_irqsave(&dev->lock, flags);
666 if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) {
667 spin_unlock_irqrestore(&dev->lock, flags);
670 spin_unlock_irqrestore(&dev->lock, flags);
673 case ISDN_STAT_DISCH:
674 spin_lock_irqsave(&dev->lock, flags);
675 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
676 if ((dev->drvmap[i] == di) &&
677 (dev->chanmap[i] == c->arg)) {
679 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
681 if (USG_NONE(dev->usage[i])) {
682 dev->usage[i] |= ISDN_USAGE_DISABLED;
688 spin_unlock_irqrestore(&dev->lock, flags);
691 case ISDN_STAT_UNLOAD:
692 while (dev->drv[di]->locks > 0) {
693 isdn_unlock_driver(dev->drv[di]);
695 spin_lock_irqsave(&dev->lock, flags);
696 isdn_tty_stat_callback(i, c);
697 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
698 if (dev->drvmap[i] == di) {
700 dev->chanmap[i] = -1;
701 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
704 dev->channels -= dev->drv[di]->channels;
705 kfree(dev->drv[di]->rcverr);
706 kfree(dev->drv[di]->rcvcount);
707 for (i = 0; i < dev->drv[di]->channels; i++)
708 skb_queue_purge(&dev->drv[di]->rpqueue[i]);
709 kfree(dev->drv[di]->rpqueue);
710 kfree(dev->drv[di]->rcv_waitq);
713 dev->drvid[di][0] = '\0';
715 set_global_features();
716 spin_unlock_irqrestore(&dev->lock, flags);
718 case ISDN_STAT_L1ERR:
720 case CAPI_PUT_MESSAGE:
721 return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
722 #ifdef CONFIG_ISDN_TTY_FAX
723 case ISDN_STAT_FAXIND:
724 isdn_tty_stat_callback(i, c);
727 #ifdef CONFIG_ISDN_AUDIO
728 case ISDN_STAT_AUDIO:
729 isdn_tty_stat_callback(i, c);
732 #ifdef CONFIG_ISDN_DIVERSION
734 case ISDN_STAT_REDIR:
736 return(divert_if->stat_callback(c));
737 #endif /* CONFIG_ISDN_DIVERSION */
745 * Get integer from char-pointer, set pointer to end of number
748 isdn_getnum(char **p)
752 while (*p[0] >= '0' && *p[0] <= '9')
753 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
760 * isdn_readbchan() tries to get data from the read-queue.
761 * It MUST be called with interrupts off.
763 * Be aware that this is not an atomic operation when sleep != 0, even though
764 * interrupts are turned off! Well, like that we are currently only called
765 * on behalf of a read system call on raw device files (which are documented
766 * to be dangerous and for debugging purpose only). The inode semaphore
767 * takes care that this is not called for the same minor device number while
768 * we are sleeping, but access is not serialized against simultaneous read()
769 * from the corresponding ttyI device. Can other ugly events, like changes
770 * of the mapping (di,ch)<->minor, happen during the sleep? --he
773 isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_queue_head_t *sleep)
784 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
786 interruptible_sleep_on(sleep);
790 if (len > dev->drv[di]->rcvcount[channel])
791 len = dev->drv[di]->rcvcount[channel];
795 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
797 #ifdef CONFIG_ISDN_AUDIO
798 if (ISDN_AUDIO_SKB_LOCK(skb))
800 ISDN_AUDIO_SKB_LOCK(skb) = 1;
801 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
803 unsigned long DLEmask = (1 << channel);
806 count_pull = count_put = 0;
807 while ((count_pull < skb->len) && (len > 0)) {
809 if (dev->drv[di]->DLEflag & DLEmask) {
811 dev->drv[di]->DLEflag &= ~DLEmask;
815 dev->drv[di]->DLEflag |= DLEmask;
816 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
823 if (count_pull >= skb->len)
827 /* No DLE's in buff, so simply copy it */
829 if ((count_pull = skb->len) > len) {
833 count_put = count_pull;
834 skb_copy_from_linear_data(skb, cp, count_put);
837 #ifdef CONFIG_ISDN_AUDIO
842 memset(fp, 0, count_put);
846 /* We got all the data in this buff.
847 * Now we can dequeue it.
851 #ifdef CONFIG_ISDN_AUDIO
852 ISDN_AUDIO_SKB_LOCK(skb) = 0;
854 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
857 /* Not yet emptied this buff, so it
858 * must stay in the queue, for further calls
859 * but we pull off the data we got until now.
861 skb_pull(skb, count_pull);
862 #ifdef CONFIG_ISDN_AUDIO
863 ISDN_AUDIO_SKB_LOCK(skb) = 0;
866 dev->drv[di]->rcvcount[channel] -= count_put;
872 * isdn_readbchan_tty() tries to get data from the read-queue.
873 * It MUST be called with interrupts off.
875 * Be aware that this is not an atomic operation when sleep != 0, even though
876 * interrupts are turned off! Well, like that we are currently only called
877 * on behalf of a read system call on raw device files (which are documented
878 * to be dangerous and for debugging purpose only). The inode semaphore
879 * takes care that this is not called for the same minor device number while
880 * we are sleeping, but access is not serialized against simultaneous read()
881 * from the corresponding ttyI device. Can other ugly events, like changes
882 * of the mapping (di,ch)<->minor, happen during the sleep? --he
885 isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
897 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
900 len = tty_buffer_request_room(tty, dev->drv[di]->rcvcount[channel]);
906 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
908 #ifdef CONFIG_ISDN_AUDIO
909 if (ISDN_AUDIO_SKB_LOCK(skb))
911 ISDN_AUDIO_SKB_LOCK(skb) = 1;
912 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
914 unsigned long DLEmask = (1 << channel);
917 count_pull = count_put = 0;
918 while ((count_pull < skb->len) && (len > 0)) {
919 /* push every character but the last to the tty buffer directly */
921 tty_insert_flip_char(tty, last, TTY_NORMAL);
923 if (dev->drv[di]->DLEflag & DLEmask) {
925 dev->drv[di]->DLEflag &= ~DLEmask;
929 dev->drv[di]->DLEflag |= DLEmask;
930 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
937 if (count_pull >= skb->len)
941 /* No DLE's in buff, so simply copy it */
943 if ((count_pull = skb->len) > len) {
947 count_put = count_pull;
949 tty_insert_flip_string(tty, skb->data, count_put - 1);
950 last = skb->data[count_put - 1];
952 #ifdef CONFIG_ISDN_AUDIO
957 /* We got all the data in this buff.
958 * Now we can dequeue it.
961 tty_insert_flip_char(tty, last, 0xFF);
963 tty_insert_flip_char(tty, last, TTY_NORMAL);
964 #ifdef CONFIG_ISDN_AUDIO
965 ISDN_AUDIO_SKB_LOCK(skb) = 0;
967 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
970 tty_insert_flip_char(tty, last, TTY_NORMAL);
971 /* Not yet emptied this buff, so it
972 * must stay in the queue, for further calls
973 * but we pull off the data we got until now.
975 skb_pull(skb, count_pull);
976 #ifdef CONFIG_ISDN_AUDIO
977 ISDN_AUDIO_SKB_LOCK(skb) = 0;
980 dev->drv[di]->rcvcount[channel] -= count_put;
987 isdn_minor2drv(int minor)
989 return (dev->drvmap[minor]);
993 isdn_minor2chan(int minor)
995 return (dev->chanmap[minor]);
1001 static char istatbuf[2048];
1005 sprintf(istatbuf, "idmap:\t");
1006 p = istatbuf + strlen(istatbuf);
1007 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1008 sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
1009 p = istatbuf + strlen(istatbuf);
1011 sprintf(p, "\nchmap:\t");
1012 p = istatbuf + strlen(istatbuf);
1013 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1014 sprintf(p, "%d ", dev->chanmap[i]);
1015 p = istatbuf + strlen(istatbuf);
1017 sprintf(p, "\ndrmap:\t");
1018 p = istatbuf + strlen(istatbuf);
1019 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1020 sprintf(p, "%d ", dev->drvmap[i]);
1021 p = istatbuf + strlen(istatbuf);
1023 sprintf(p, "\nusage:\t");
1024 p = istatbuf + strlen(istatbuf);
1025 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1026 sprintf(p, "%d ", dev->usage[i]);
1027 p = istatbuf + strlen(istatbuf);
1029 sprintf(p, "\nflags:\t");
1030 p = istatbuf + strlen(istatbuf);
1031 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
1033 sprintf(p, "%ld ", dev->drv[i]->online);
1034 p = istatbuf + strlen(istatbuf);
1037 p = istatbuf + strlen(istatbuf);
1040 sprintf(p, "\nphone:\t");
1041 p = istatbuf + strlen(istatbuf);
1042 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1043 sprintf(p, "%s ", dev->num[i]);
1044 p = istatbuf + strlen(istatbuf);
1050 /* Module interface-code */
1053 isdn_info_update(void)
1055 infostruct *p = dev->infochain;
1059 p = (infostruct *) p->next;
1061 wake_up_interruptible(&(dev->info_waitq));
1065 isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
1067 uint minor = iminor(file->f_path.dentry->d_inode);
1074 mutex_lock(&isdn_mutex);
1075 if (minor == ISDN_MINOR_STATUS) {
1076 if (!file->private_data) {
1077 if (file->f_flags & O_NONBLOCK) {
1081 interruptible_sleep_on(&(dev->info_waitq));
1084 file->private_data = NULL;
1085 if ((len = strlen(p)) <= count) {
1086 if (copy_to_user(buf, p, len)) {
1097 if (!dev->drivers) {
1101 if (minor <= ISDN_MINOR_BMAX) {
1102 printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
1103 drvidx = isdn_minor2drv(minor);
1108 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1112 chidx = isdn_minor2chan(minor);
1113 if (!(p = kmalloc(count, GFP_KERNEL))) {
1117 len = isdn_readbchan(drvidx, chidx, p, NULL, count,
1118 &dev->drv[drvidx]->rcv_waitq[chidx]);
1120 if (copy_to_user(buf,p,len))
1126 if (minor <= ISDN_MINOR_CTRLMAX) {
1127 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1132 if (!dev->drv[drvidx]->stavail) {
1133 if (file->f_flags & O_NONBLOCK) {
1137 interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
1139 if (dev->drv[drvidx]->interface->readstat) {
1140 if (count > dev->drv[drvidx]->stavail)
1141 count = dev->drv[drvidx]->stavail;
1142 len = dev->drv[drvidx]->interface->readstat(buf, count,
1143 drvidx, isdn_minor2chan(minor - ISDN_MINOR_CTRL));
1152 dev->drv[drvidx]->stavail -= len;
1154 dev->drv[drvidx]->stavail = 0;
1159 #ifdef CONFIG_ISDN_PPP
1160 if (minor <= ISDN_MINOR_PPPMAX) {
1161 retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
1167 mutex_unlock(&isdn_mutex);
1172 isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
1174 uint minor = iminor(file->f_path.dentry->d_inode);
1179 if (minor == ISDN_MINOR_STATUS)
1184 mutex_lock(&isdn_mutex);
1185 if (minor <= ISDN_MINOR_BMAX) {
1186 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
1187 drvidx = isdn_minor2drv(minor);
1192 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1196 chidx = isdn_minor2chan(minor);
1197 while ((retval = isdn_writebuf_stub(drvidx, chidx, buf, count)) == 0)
1198 interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]);
1201 if (minor <= ISDN_MINOR_CTRLMAX) {
1202 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1208 * We want to use the isdnctrl device to load the firmware
1210 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1213 if (dev->drv[drvidx]->interface->writecmd)
1214 retval = dev->drv[drvidx]->interface->
1215 writecmd(buf, count, drvidx,
1216 isdn_minor2chan(minor - ISDN_MINOR_CTRL));
1221 #ifdef CONFIG_ISDN_PPP
1222 if (minor <= ISDN_MINOR_PPPMAX) {
1223 retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
1229 mutex_unlock(&isdn_mutex);
1234 isdn_poll(struct file *file, poll_table * wait)
1236 unsigned int mask = 0;
1237 unsigned int minor = iminor(file->f_path.dentry->d_inode);
1238 int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1240 mutex_lock(&isdn_mutex);
1241 if (minor == ISDN_MINOR_STATUS) {
1242 poll_wait(file, &(dev->info_waitq), wait);
1243 /* mask = POLLOUT | POLLWRNORM; */
1244 if (file->private_data) {
1245 mask |= POLLIN | POLLRDNORM;
1249 if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1251 /* driver deregistered while file open */
1255 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1256 mask = POLLOUT | POLLWRNORM;
1257 if (dev->drv[drvidx]->stavail) {
1258 mask |= POLLIN | POLLRDNORM;
1262 #ifdef CONFIG_ISDN_PPP
1263 if (minor <= ISDN_MINOR_PPPMAX) {
1264 mask = isdn_ppp_poll(file, wait);
1270 mutex_unlock(&isdn_mutex);
1276 isdn_ioctl(struct file *file, uint cmd, ulong arg)
1278 uint minor = iminor(file->f_path.dentry->d_inode);
1289 isdn_ioctl_struct iocts;
1290 isdn_net_ioctl_phone phone;
1291 isdn_net_ioctl_cfg cfg;
1293 void __user *argp = (void __user *)arg;
1295 #define name iocpar.name
1296 #define bname iocpar.bname
1297 #define iocts iocpar.iocts
1298 #define phone iocpar.phone
1299 #define cfg iocpar.cfg
1301 if (minor == ISDN_MINOR_STATUS) {
1309 ulong __user *p = argp;
1311 if (!access_ok(VERIFY_WRITE, p,
1312 sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1314 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1315 put_user(dev->ibytes[i], p++);
1316 put_user(dev->obytes[i], p++);
1322 #ifdef CONFIG_NETDEVICES
1324 /* Get peer phone number of a connected
1325 * isdn network interface */
1327 if (copy_from_user(&phone, argp, sizeof(phone)))
1329 return isdn_net_getpeer(&phone, argp);
1339 if (minor <= ISDN_MINOR_BMAX) {
1340 drvidx = isdn_minor2drv(minor);
1343 chidx = isdn_minor2chan(minor);
1344 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1348 if (minor <= ISDN_MINOR_CTRLMAX) {
1350 * isdn net devices manage lots of configuration variables as linked lists.
1351 * Those lists must only be manipulated from user space. Some of the ioctl's
1352 * service routines access user space and are not atomic. Therefore, ioctl's
1353 * manipulating the lists and ioctl's sleeping while accessing the lists
1354 * are serialized by means of a semaphore.
1358 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1361 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1363 #ifdef CONFIG_NETDEVICES
1365 /* Add a network-interface */
1367 if (copy_from_user(name, argp, sizeof(name)))
1373 ret = mutex_lock_interruptible(&dev->mtx);
1374 if( ret ) return ret;
1375 if ((s = isdn_net_new(s, NULL))) {
1376 if (copy_to_user(argp, s, strlen(s) + 1)){
1383 mutex_unlock(&dev->mtx);
1386 /* Add a slave to a network-interface */
1388 if (copy_from_user(bname, argp, sizeof(bname) - 1))
1392 ret = mutex_lock_interruptible(&dev->mtx);
1393 if( ret ) return ret;
1394 if ((s = isdn_net_newslave(bname))) {
1395 if (copy_to_user(argp, s, strlen(s) + 1)){
1402 mutex_unlock(&dev->mtx);
1405 /* Delete a network-interface */
1407 if (copy_from_user(name, argp, sizeof(name)))
1409 ret = mutex_lock_interruptible(&dev->mtx);
1410 if( ret ) return ret;
1411 ret = isdn_net_rm(name);
1412 mutex_unlock(&dev->mtx);
1417 /* Set configurable parameters of a network-interface */
1419 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1421 return isdn_net_setcfg(&cfg);
1425 /* Get configurable parameters of a network-interface */
1427 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1429 if (!(ret = isdn_net_getcfg(&cfg))) {
1430 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1437 /* Add a phone-number to a network-interface */
1439 if (copy_from_user(&phone, argp, sizeof(phone)))
1441 ret = mutex_lock_interruptible(&dev->mtx);
1442 if( ret ) return ret;
1443 ret = isdn_net_addphone(&phone);
1444 mutex_unlock(&dev->mtx);
1449 /* Get list of phone-numbers of a network-interface */
1451 if (copy_from_user(&phone, argp, sizeof(phone)))
1453 ret = mutex_lock_interruptible(&dev->mtx);
1454 if( ret ) return ret;
1455 ret = isdn_net_getphones(&phone, argp);
1456 mutex_unlock(&dev->mtx);
1461 /* Delete a phone-number of a network-interface */
1463 if (copy_from_user(&phone, argp, sizeof(phone)))
1465 ret = mutex_lock_interruptible(&dev->mtx);
1466 if( ret ) return ret;
1467 ret = isdn_net_delphone(&phone);
1468 mutex_unlock(&dev->mtx);
1473 /* Force dialing of a network-interface */
1475 if (copy_from_user(name, argp, sizeof(name)))
1477 return isdn_net_force_dial(name);
1480 #ifdef CONFIG_ISDN_PPP
1484 if (copy_from_user(name, argp, sizeof(name)))
1486 return isdn_ppp_dial_slave(name);
1490 if (copy_from_user(name, argp, sizeof(name)))
1492 return isdn_ppp_hangup_slave(name);
1495 /* Force hangup of a network-interface */
1498 if (copy_from_user(name, argp, sizeof(name)))
1500 return isdn_net_force_hangup(name);
1502 #endif /* CONFIG_NETDEVICES */
1504 dev->net_verbose = arg;
1505 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1509 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1511 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1512 printk(KERN_INFO "isdn: Global Mode %s\n",
1513 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1520 if (copy_from_user(&iocts, argp,
1521 sizeof(isdn_ioctl_struct)))
1523 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1524 if (strlen(iocts.drvid)) {
1525 if ((p = strchr(iocts.drvid, ',')))
1528 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1529 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1538 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1540 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1543 dev->profd = current;
1547 /* Get all Modem-Profiles */
1549 char __user *p = argp;
1552 if (!access_ok(VERIFY_WRITE, argp,
1553 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1554 * ISDN_MAX_CHANNELS))
1557 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1558 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1561 p += ISDN_MODEM_NUMREG;
1562 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1565 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1569 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1574 /* Set all Modem-Profiles */
1576 char __user *p = argp;
1579 if (!access_ok(VERIFY_READ, argp,
1580 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1581 * ISDN_MAX_CHANNELS))
1584 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1585 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1588 p += ISDN_MODEM_NUMREG;
1589 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1592 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1602 /* Set/Get MSN->EAZ-Mapping for a driver */
1605 if (copy_from_user(&iocts, argp,
1606 sizeof(isdn_ioctl_struct)))
1608 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1609 if (strlen(iocts.drvid)) {
1611 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1612 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1620 if (cmd == IIOCSETMAP) {
1623 p = (char __user *) iocts.arg;
1629 if (!access_ok(VERIFY_READ, p, 1))
1631 get_user(bname[j], p++);
1638 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1644 if (j >= ISDN_MSNLEN)
1651 p = (char __user *) iocts.arg;
1652 for (i = 0; i < 10; i++) {
1653 snprintf(bname, sizeof(bname), "%s%s",
1654 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1655 dev->drv[drvidx]->msn2eaz[i] : "_",
1656 (i < 9) ? "," : "\0");
1657 if (copy_to_user(p, bname, strlen(bname) + 1))
1667 if (copy_to_user(argp, &dev, sizeof(ulong)))
1674 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1675 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1681 if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
1683 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1684 if (strlen(iocts.drvid)) {
1685 if ((p = strchr(iocts.drvid, ',')))
1688 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1689 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1697 if (!access_ok(VERIFY_WRITE, argp,
1698 sizeof(isdn_ioctl_struct)))
1701 c.command = ISDN_CMD_IOCTL;
1703 memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1704 ret = isdn_command(&c);
1705 memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1706 if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1713 #ifdef CONFIG_ISDN_PPP
1714 if (minor <= ISDN_MINOR_PPPMAX)
1715 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1727 isdn_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1731 mutex_lock(&isdn_mutex);
1732 ret = isdn_ioctl(file, cmd, arg);
1733 mutex_unlock(&isdn_mutex);
1739 * Open the device code.
1742 isdn_open(struct inode *ino, struct file *filep)
1744 uint minor = iminor(ino);
1747 int retval = -ENODEV;
1749 mutex_lock(&isdn_mutex);
1750 if (minor == ISDN_MINOR_STATUS) {
1753 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1754 p->next = (char *) dev->infochain;
1755 p->private = (char *) &(filep->private_data);
1757 /* At opening we allow a single update */
1758 filep->private_data = (char *) 1;
1768 if (minor <= ISDN_MINOR_BMAX) {
1769 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1770 drvidx = isdn_minor2drv(minor);
1773 chidx = isdn_minor2chan(minor);
1774 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1776 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1778 isdn_lock_drivers();
1782 if (minor <= ISDN_MINOR_CTRLMAX) {
1783 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1786 isdn_lock_drivers();
1790 #ifdef CONFIG_ISDN_PPP
1791 if (minor <= ISDN_MINOR_PPPMAX) {
1792 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1794 isdn_lock_drivers();
1799 nonseekable_open(ino, filep);
1800 mutex_unlock(&isdn_mutex);
1805 isdn_close(struct inode *ino, struct file *filep)
1807 uint minor = iminor(ino);
1809 mutex_lock(&isdn_mutex);
1810 if (minor == ISDN_MINOR_STATUS) {
1811 infostruct *p = dev->infochain;
1812 infostruct *q = NULL;
1815 if (p->private == (char *) &(filep->private_data)) {
1819 dev->infochain = (infostruct *) (p->next);
1824 p = (infostruct *) (p->next);
1826 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1829 isdn_unlock_drivers();
1830 if (minor <= ISDN_MINOR_BMAX)
1832 if (minor <= ISDN_MINOR_CTRLMAX) {
1833 if (dev->profd == current)
1837 #ifdef CONFIG_ISDN_PPP
1838 if (minor <= ISDN_MINOR_PPPMAX)
1839 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1843 mutex_unlock(&isdn_mutex);
1847 static const struct file_operations isdn_fops =
1849 .owner = THIS_MODULE,
1850 .llseek = no_llseek,
1852 .write = isdn_write,
1854 .unlocked_ioctl = isdn_unlocked_ioctl,
1856 .release = isdn_close,
1860 isdn_map_eaz2msn(char *msn, int di)
1862 isdn_driver_t *this = dev->drv[di];
1865 if (strlen(msn) == 1) {
1867 if ((i >= 0) && (i <= 9))
1868 if (strlen(this->msn2eaz[i]))
1869 return (this->msn2eaz[i]);
1875 * Find an unused ISDN-channel, whose feature-flags match the
1876 * given L2- and L3-protocols.
1878 #define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1881 * This function must be called with holding the dev->lock.
1884 isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1885 ,int pre_chan, char *msn)
1891 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1892 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1893 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1894 /* If Layer-2 protocol is V.110, accept drivers with
1895 * transparent feature even if these don't support V.110
1896 * because we can emulate this in linklevel.
1898 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1899 if (USG_NONE(dev->usage[i]) &&
1900 (dev->drvmap[i] != -1)) {
1901 int d = dev->drvmap[i];
1902 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1903 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1905 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1907 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1908 continue; /* usage not allowed */
1909 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1910 if (((dev->drv[d]->interface->features & features) == features) ||
1911 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1912 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1913 if ((pre_dev < 0) || (pre_chan < 0)) {
1914 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1915 dev->usage[i] |= usage;
1919 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1920 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1921 dev->usage[i] |= usage;
1933 * Set state of ISDN-channel to 'unused'
1936 isdn_free_channel(int di, int ch, int usage)
1940 if ((di < 0) || (ch < 0)) {
1941 printk(KERN_WARNING "%s: called with invalid drv(%d) or channel(%d)\n",
1945 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1946 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1947 (dev->drvmap[i] == di) &&
1948 (dev->chanmap[i] == ch)) {
1949 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1950 strcpy(dev->num[i], "???");
1953 // 20.10.99 JIM, try to reinitialize v110 !
1954 dev->v110emu[i] = 0;
1955 atomic_set(&(dev->v110use[i]), 0);
1956 isdn_v110_close(dev->v110[i]);
1957 dev->v110[i] = NULL;
1958 // 20.10.99 JIM, try to reinitialize v110 !
1961 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1966 * Cancel Exclusive-Flag for ISDN-channel
1969 isdn_unexclusive_channel(int di, int ch)
1973 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1974 if ((dev->drvmap[i] == di) &&
1975 (dev->chanmap[i] == ch)) {
1976 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1983 * writebuf replacement for SKB_ABLE drivers
1986 isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
1989 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1990 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1994 skb_reserve(skb, hl);
1995 if (copy_from_user(skb_put(skb, len), buf, len)) {
1999 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
2003 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
2008 * Return: length of data on success, -ERRcode on failure.
2011 isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
2014 struct sk_buff *nskb = NULL;
2015 int v110_ret = skb->len;
2016 int idx = isdn_dc2minor(drvidx, chan);
2018 if (dev->v110[idx]) {
2019 atomic_inc(&dev->v110use[idx]);
2020 nskb = isdn_v110_encode(dev->v110[idx], skb);
2021 atomic_dec(&dev->v110use[idx]);
2024 v110_ret = *((int *)nskb->data);
2025 skb_pull(nskb, sizeof(int));
2027 dev_kfree_skb(nskb);
2030 /* V.110 must always be acknowledged */
2032 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
2034 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
2036 if( skb_headroom(skb) < hl ){
2038 * This should only occur when new HL driver with
2039 * increased hl_hdrlen was loaded after netdevice
2040 * was created and connected to the new driver.
2042 * The V.110 branch (re-allocates on its own) does
2045 struct sk_buff * skb_tmp;
2047 skb_tmp = skb_realloc_headroom(skb, hl);
2048 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
2049 if (!skb_tmp) return -ENOMEM; /* 0 better? */
2050 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
2054 dev_kfree_skb(skb_tmp);
2057 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
2061 dev->obytes[idx] += ret;
2062 if (dev->v110[idx]) {
2063 atomic_inc(&dev->v110use[idx]);
2064 dev->v110[idx]->skbuser++;
2065 atomic_dec(&dev->v110use[idx]);
2066 /* For V.110 return unencoded data length */
2068 /* if the complete frame was send we free the skb;
2069 if not upper function will requeue the skb */
2070 if (ret == skb->len)
2075 dev_kfree_skb(nskb);
2080 isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
2084 init_waitqueue_head(&d->st_waitq);
2085 if (d->flags & DRV_FLAG_RUNNING)
2087 if (n < 1) return 0;
2089 m = (adding) ? d->channels + n : n;
2091 if (dev->channels + n > ISDN_MAX_CHANNELS) {
2092 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2097 if ((adding) && (d->rcverr))
2099 if (!(d->rcverr = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2100 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2104 if ((adding) && (d->rcvcount))
2106 if (!(d->rcvcount = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
2107 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
2113 if ((adding) && (d->rpqueue)) {
2114 for (j = 0; j < d->channels; j++)
2115 skb_queue_purge(&d->rpqueue[j]);
2118 if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
2119 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2126 for (j = 0; j < m; j++) {
2127 skb_queue_head_init(&d->rpqueue[j]);
2130 if ((adding) && (d->rcv_waitq))
2131 kfree(d->rcv_waitq);
2132 d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_ATOMIC);
2133 if (!d->rcv_waitq) {
2134 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2142 d->snd_waitq = d->rcv_waitq + m;
2143 for (j = 0; j < m; j++) {
2144 init_waitqueue_head(&d->rcv_waitq[j]);
2145 init_waitqueue_head(&d->snd_waitq[j]);
2149 for (j = d->channels; j < m; j++)
2150 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2151 if (dev->chanmap[k] < 0) {
2152 dev->chanmap[k] = j;
2153 dev->drvmap[k] = drvidx;
2161 * Low-level-driver registration
2165 set_global_features(void)
2169 dev->global_features = 0;
2170 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2171 if (!dev->drv[drvidx])
2173 if (dev->drv[drvidx]->interface)
2174 dev->global_features |= dev->drv[drvidx]->interface->features;
2178 #ifdef CONFIG_ISDN_DIVERSION
2180 static char *map_drvname(int di)
2182 if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2184 return(dev->drvid[di]); /* driver name */
2187 static int map_namedrv(char *id)
2190 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2191 { if (!strcmp(dev->drvid[i],id))
2197 int DIVERT_REG_NAME(isdn_divert_if *i_div)
2199 if (i_div->if_magic != DIVERT_IF_MAGIC)
2200 return(DIVERT_VER_ERR);
2203 case DIVERT_CMD_REL:
2204 if (divert_if != i_div)
2205 return(DIVERT_REL_ERR);
2206 divert_if = NULL; /* free interface */
2207 return(DIVERT_NO_ERR);
2209 case DIVERT_CMD_REG:
2211 return(DIVERT_REG_ERR);
2212 i_div->ll_cmd = isdn_command; /* set command function */
2213 i_div->drv_to_name = map_drvname;
2214 i_div->name_to_drv = map_namedrv;
2215 divert_if = i_div; /* remember interface */
2216 return(DIVERT_NO_ERR);
2219 return(DIVERT_CMD_ERR);
2221 } /* DIVERT_REG_NAME */
2223 EXPORT_SYMBOL(DIVERT_REG_NAME);
2225 #endif /* CONFIG_ISDN_DIVERSION */
2228 EXPORT_SYMBOL(register_isdn);
2229 #ifdef CONFIG_ISDN_PPP
2230 EXPORT_SYMBOL(isdn_ppp_register_compressor);
2231 EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2235 register_isdn(isdn_if * i)
2242 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2243 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2247 if (!i->writebuf_skb) {
2248 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2251 if (!(d = kzalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
2252 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2256 d->maxbufsize = i->maxbufsize;
2259 d->flags = DRV_FLAG_LOADED;
2263 spin_lock_irqsave(&dev->lock, flags);
2264 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2265 if (!dev->drv[drvidx])
2267 if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2268 spin_unlock_irqrestore(&dev->lock, flags);
2272 i->channels = drvidx;
2273 i->rcvcallb_skb = isdn_receive_skb_callback;
2274 i->statcallb = isdn_status_callback;
2276 sprintf(i->id, "line%d", drvidx);
2277 for (j = 0; j < drvidx; j++)
2278 if (!strcmp(i->id, dev->drvid[j]))
2279 sprintf(i->id, "line%d", drvidx);
2280 dev->drv[drvidx] = d;
2281 strcpy(dev->drvid[drvidx], i->id);
2284 set_global_features();
2285 spin_unlock_irqrestore(&dev->lock, flags);
2290 *****************************************************************************
2291 * And now the modules code.
2292 *****************************************************************************
2296 isdn_getrev(const char *revision)
2301 if ((p = strchr(revision, ':'))) {
2303 p = strchr(rev, '$');
2311 * Allocate and initialize all data, register modem-devices
2313 static int __init isdn_init(void)
2318 if (!(dev = vmalloc(sizeof(isdn_dev)))) {
2319 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2322 memset((char *) dev, 0, sizeof(isdn_dev));
2323 init_timer(&dev->timer);
2324 dev->timer.function = isdn_timer_funct;
2325 spin_lock_init(&dev->lock);
2326 spin_lock_init(&dev->timerlock);
2328 dev->owner = THIS_MODULE;
2330 mutex_init(&dev->mtx);
2331 init_waitqueue_head(&dev->info_waitq);
2332 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2333 dev->drvmap[i] = -1;
2334 dev->chanmap[i] = -1;
2336 strcpy(dev->num[i], "???");
2337 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2338 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2340 if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2341 printk(KERN_WARNING "isdn: Could not register control devices\n");
2345 if ((isdn_tty_modem_init()) < 0) {
2346 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2348 unregister_chrdev(ISDN_MAJOR, "isdn");
2351 #ifdef CONFIG_ISDN_PPP
2352 if (isdn_ppp_init() < 0) {
2353 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2355 unregister_chrdev(ISDN_MAJOR, "isdn");
2359 #endif /* CONFIG_ISDN_PPP */
2361 strcpy(tmprev, isdn_revision);
2362 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2363 strcpy(tmprev, isdn_tty_revision);
2364 printk("%s/", isdn_getrev(tmprev));
2365 strcpy(tmprev, isdn_net_revision);
2366 printk("%s/", isdn_getrev(tmprev));
2367 strcpy(tmprev, isdn_ppp_revision);
2368 printk("%s/", isdn_getrev(tmprev));
2369 strcpy(tmprev, isdn_audio_revision);
2370 printk("%s/", isdn_getrev(tmprev));
2371 strcpy(tmprev, isdn_v110_revision);
2372 printk("%s", isdn_getrev(tmprev));
2375 printk(" loaded\n");
2386 static void __exit isdn_exit(void)
2388 #ifdef CONFIG_ISDN_PPP
2391 if (isdn_net_rmall() < 0) {
2392 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2396 unregister_chrdev(ISDN_MAJOR, "isdn");
2397 del_timer(&dev->timer);
2398 /* call vfree with interrupts enabled, else it will hang */
2400 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2403 module_init(isdn_init);
2404 module_exit(isdn_exit);