URL
https://opencores.org/ocsvn/or1k/or1k/trunk
Subversion Repositories or1k
[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [isdn/] [isdn_common.c] - Rev 1765
Compare with Previous | Blame | View Log
/* $Id: isdn_common.c,v 1.1 2005-12-20 10:16:56 jcastillo Exp $ * Linux ISDN subsystem, common used functions (linklevel). * * Copyright 1994-1998 by Fritz Elfert (fritz@isdn4linux.de) * Copyright 1995,96 Thinking Objects Software GmbH Wuerzburg * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * $Log: not supported by cvs2svn $ * Revision 1.1.1.1 2001/09/10 07:44:18 simons * Initial import * * Revision 1.1.1.1 2001/07/02 17:58:31 simons * Initial revision * * Revision 1.44.2.9 1998/11/06 00:07:25 fritz * Bugfix: loading additional driver while /dev/isdnctrl opened resulted in * wrong module usage count after closing /dev/isdnctrl. * * Revision 1.44.2.8 1998/11/05 22:11:43 fritz * Changed mail-address. * * Revision 1.44.2.7 1998/11/04 17:22:40 fritz * Replaced broken lowlevel-driver locking. * * Revision 1.44.2.6 1998/11/03 14:30:56 fritz * Reduced stack usage in various functions. * Adapted statemachine to work with certified HiSax. * Some fixes in callback handling. * * Revision 1.44.2.5 1998/10/25 15:48:04 fritz * Misc bugfixes and adaptions to new HiSax * * Revision 1.44.2.4 1998/06/07 13:47:44 fritz * ABC cleanup * * Revision 1.44.2.2 1998/03/16 09:55:44 cal * Merged in TimRu-patches. Still needs validation in conjunction with ABC-patches. * * Revision 1.44.2.1 1998/03/07 23:35:03 detabc * added the abc-extension to the linux isdn-kernel * for kernel-version 2.0.xx * DO NOT USE FOR HIGHER KERNELS-VERSIONS * all source-lines are switched with the define CONFIG_ISDN_WITH_ABC * (make config and answer ABC-Ext. Support (Compress,TCP-Keepalive ...) with yes * * you need also a modified isdnctrl-source the switch on the * features of the abc-extension * * please use carefully. more detail will be follow. * thanks * * Revision 1.44 1997/05/27 15:17:23 fritz * Added changes for recent 2.1.x kernels: * changed return type of isdn_close * queue_task_* -> queue_task * clear/set_bit -> test_and_... where apropriate. * changed type of hard_header_cache parameter. * * Revision 1.43 1997/03/31 14:09:43 fritz * Fixed memory leak in isdn_close(). * * Revision 1.42 1997/03/30 16:51:08 calle * changed calls to copy_from_user/copy_to_user and removed verify_area * were possible. * * Revision 1.41 1997/03/24 22:54:41 fritz * Some small fixes in debug code. * * Revision 1.40 1997/03/08 08:13:51 fritz * Bugfix: IIOCSETMAP (Set mapping) was broken. * * Revision 1.39 1997/03/07 01:32:54 fritz * Added proper ifdef's for CONFIG_ISDN_AUDIO * * Revision 1.38 1997/03/05 21:15:02 fritz * Fix: reduced stack usage of isdn_ioctl() and isdn_set_allcfg() * * Revision 1.37 1997/03/02 14:29:18 fritz * More ttyI related cleanup. * * Revision 1.36 1997/02/28 02:32:40 fritz * Cleanup: Moved some tty related stuff from isdn_common.c * to isdn_tty.c * Bugfix: Bisync protocol did not behave like documented. * * Revision 1.35 1997/02/21 13:01:19 fritz * Changes CAUSE message output in kernel log. * * Revision 1.34 1997/02/10 20:12:43 fritz * Changed interface for reporting incoming calls. * * Revision 1.33 1997/02/10 10:05:42 fritz * More changes for Kernel 2.1.X * Symbol information moved to isdn_syms.c * * Revision 1.32 1997/02/03 22:55:26 fritz * Reformatted according CodingStyle. * Changed isdn_writebuf_stub static. * Slow down tty-RING counter. * skb->free stuff replaced by macro. * Bugfix in audio-skb locking. * Bugfix in HL-driver locking. * * Revision 1.31 1997/01/17 01:19:18 fritz * Applied chargeint patch. * * Revision 1.30 1997/01/14 01:27:47 fritz * Changed audio receive not to rely on skb->users and skb->lock. * Added ATI2 and related variables. * Started adding full-duplex audio capability. * * Revision 1.29 1997/01/12 23:33:03 fritz * Made isdn_all_eaz foolproof. * * Revision 1.28 1996/11/13 02:33:19 fritz * Fixed a race condition. * * Revision 1.27 1996/10/27 22:02:41 keil * return codes for ISDN_STAT_ICALL * * Revision 1.26 1996/10/23 11:59:40 fritz * More compatibility changes. * * Revision 1.25 1996/10/22 23:13:54 fritz * Changes for compatibility to 2.0.X and 2.1.X kernels. * * Revision 1.24 1996/10/11 14:02:03 fritz * Bugfix: call to isdn_ppp_timer_timeout() never compiled, because of * typo in #ifdef. * * Revision 1.23 1996/06/25 18:35:38 fritz * Fixed bogus memory access in isdn_set_allcfg(). * * Revision 1.22 1996/06/24 17:37:37 fritz * Bugfix: isdn_timer_ctrl() did restart timer, even if it * was already running. * lowlevel driver locking did use wrong parameters. * * Revision 1.21 1996/06/15 14:58:20 fritz * Added version signatures for data structures used * by userlevel programs. * * Revision 1.20 1996/06/12 16:01:49 fritz * Bugfix: Remote B-channel hangup sometimes did not result * in a NO CARRIER on tty. * * Revision 1.19 1996/06/11 14:52:04 hipp * minor bugfix in isdn_writebuf_skb_stub() * * Revision 1.18 1996/06/06 14:51:51 fritz * Changed to support DTMF decoding on audio playback also. * * Revision 1.17 1996/06/05 02:24:10 fritz * Added DTMF decoder for audio mode. * * Revision 1.16 1996/06/03 20:09:05 fritz * Bugfix: called wrong function pointer for locking in * isdn_get_free_channel(). * * Revision 1.15 1996/05/31 01:10:54 fritz * Bugfixes: * Lowlevel modules did not get locked correctly. * Did show wrong revision when initializing. * Minor fixes in ioctl code. * sk_buff did not get freed, if error in writebuf_stub. * * Revision 1.14 1996/05/18 01:36:55 fritz * Added spelling corrections and some minor changes * to stay in sync with kernel. * * Revision 1.13 1996/05/17 15:43:30 fritz * Bugfix: decrement of rcvcount in readbchan() corrected. * * Revision 1.12 1996/05/17 03:55:43 fritz * Changed DLE handling for audio receive. * Some cleanup. * Added display of isdn_audio_revision. * * Revision 1.11 1996/05/11 21:51:32 fritz * Changed queue management to use sk_buffs. * * Revision 1.10 1996/05/10 08:49:16 fritz * Checkin before major changes of tty-code. * * Revision 1.9 1996/05/07 09:19:41 fritz * Adapted to changes in isdn_tty.c * * Revision 1.8 1996/05/06 11:34:51 hipp * fixed a few bugs * * Revision 1.7 1996/05/02 03:55:17 fritz * Bugfixes: * - B-channel connect message for modem devices * sometimes did not result in a CONNECT-message. * - register_isdn did not check for driverId-conflicts. * * Revision 1.6 1996/04/30 20:57:21 fritz * Commit test * * Revision 1.5 1996/04/20 16:19:07 fritz * Changed slow timer handlers to increase accuracy. * Added statistic information for usage by xisdnload. * Fixed behaviour of isdnctrl-device on non-blocked io. * Fixed all io to go through generic writebuf-function without * bypassing. Same for incoming data. * Fixed bug: Last channel had been unusable. * Fixed kfree of tty xmit_buf on ppp initialization failure. * * Revision 1.4 1996/02/11 02:33:26 fritz * Fixed bug in main timer-dispatcher. * Bugfix: Lot of tty-callbacks got called regardless of the events already * been handled by network-devices. * Changed ioctl-names. * * Revision 1.3 1996/01/22 05:16:11 fritz * Changed ioctl-names. * Fixed bugs in isdn_open and isdn_close regarding PPP_MINOR. * * Revision 1.2 1996/01/21 16:52:40 fritz * Support for sk_buffs added, changed header-stuffing. * * Revision 1.1 1996/01/09 04:12:52 fritz * Initial revision * */ #include <linux/config.h> #define __NO_VERSION__ #include <linux/module.h> #include <linux/version.h> #if (LINUX_VERSION_CODE >= 0x020117) #include <asm/poll.h> #endif #include <linux/isdn.h> #include "isdn_common.h" #include "isdn_tty.h" #include "isdn_net.h" #include "isdn_ppp.h" #ifdef CONFIG_ISDN_AUDIO #include "isdn_audio.h" #endif #include "isdn_cards.h" /* Debugflags */ #undef ISDN_DEBUG_STATCALLB isdn_dev *dev = (isdn_dev *) 0; static char *isdn_revision = "$Revision: 1.1 $"; extern char *isdn_net_revision; extern char *isdn_tty_revision; #ifdef CONFIG_ISDN_PPP extern char *isdn_ppp_revision; #else static char *isdn_ppp_revision = ": none $"; #endif #ifdef CONFIG_ISDN_AUDIO extern char *isdn_audio_revision; #else static char *isdn_audio_revision = ": none $"; #endif static int isdn_writebuf_stub(int, int, const u_char *, int, int); void isdn_MOD_INC_USE_COUNT(void) { int i; MOD_INC_USE_COUNT; for (i = 0; i < dev->drivers; i++) { isdn_ctrl cmd; cmd.driver = i; cmd.arg = 0; cmd.command = ISDN_CMD_LOCK; isdn_command(&cmd); dev->drv[i]->locks++; } } void isdn_MOD_DEC_USE_COUNT(void) { int i; MOD_DEC_USE_COUNT; for (i = 0; i < dev->drivers; i++) if (dev->drv[i]->locks > 0) { isdn_ctrl cmd; cmd.driver = i; cmd.arg = 0; cmd.command = ISDN_CMD_UNLOCK; isdn_command(&cmd); dev->drv[i]->locks--; } } #if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP) || defined(CONFIG_ISDN_TIMEOUT_RULES) void isdn_dumppkt(char *s, u_char * p, int len, int dumplen) { int dumpc; printk(KERN_DEBUG "%s(%d) ", s, len); for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++) printk(" %02x", *p++); printk("\n"); } #endif static __inline void isdn_trash_skb(struct sk_buff *skb, int rw) { SET_SKB_FREE(skb); kfree_skb(skb, rw); } static void isdn_free_queue(struct sk_buff_head *queue) { struct sk_buff *skb; unsigned long flags; save_flags(flags); cli(); if (skb_queue_len(queue)) while ((skb = skb_dequeue(queue))) isdn_trash_skb(skb, FREE_READ); restore_flags(flags); } int isdn_dc2minor(int di, int ch) { int i; for (i = 0; i < ISDN_MAX_CHANNELS; i++) if (dev->chanmap[i] == ch && dev->drvmap[i] == di) return i; return -1; } static int isdn_timer_cnt1 = 0; static int isdn_timer_cnt2 = 0; static int isdn_timer_cnt3 = 0; static void isdn_timer_funct(ulong dummy) { int tf = dev->tflags; if (tf & ISDN_TIMER_FAST) { if (tf & ISDN_TIMER_MODEMREAD) isdn_tty_readmodem(); if (tf & ISDN_TIMER_MODEMPLUS) isdn_tty_modem_escape(); if (tf & ISDN_TIMER_MODEMXMIT) isdn_tty_modem_xmit(); } if (tf & ISDN_TIMER_SLOW) { if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) { isdn_timer_cnt1 = 0; if (tf & ISDN_TIMER_NETDIAL) isdn_net_dial(); } if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) { isdn_timer_cnt2 = 0; if (tf & ISDN_TIMER_NETHANGUP) isdn_net_autohup(); if (++isdn_timer_cnt3 > ISDN_TIMER_RINGING) { isdn_timer_cnt3 = 0; if (tf & ISDN_TIMER_MODEMRING) isdn_tty_modem_ring(); } #if (defined CONFIG_ISDN_PPP) && (defined CONFIG_ISDN_MPP) if (tf & ISDN_TIMER_IPPP) isdn_ppp_timer_timeout(); #endif } } if (tf) { int flags; save_flags(flags); cli(); del_timer(&dev->timer); dev->timer.expires = jiffies + ISDN_TIMER_RES; add_timer(&dev->timer); restore_flags(flags); } } void isdn_timer_ctrl(int tf, int onoff) { int flags; save_flags(flags); cli(); if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) { /* If the slow-timer wasn't activated until now */ isdn_timer_cnt1 = 0; isdn_timer_cnt2 = 0; } if (onoff) dev->tflags |= tf; else dev->tflags &= ~tf; if (dev->tflags) { if (!del_timer(&dev->timer)) /* del_timer is 1, when active */ dev->timer.expires = jiffies + ISDN_TIMER_RES; add_timer(&dev->timer); } restore_flags(flags); } /* * Receive a packet from B-Channel. (Called from low-level-module) */ static void isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb) { int i; if ((i = isdn_dc2minor(di, channel)) == -1) { isdn_trash_skb(skb, FREE_READ); return; } /* Update statistics */ dev->ibytes[i] += skb->len; /* First, try to deliver data to network-device */ if (isdn_net_rcv_skb(i, skb)) return; /* No network-device found, deliver to tty or raw-channel */ SET_SKB_FREE(skb); if (skb->len) { if (isdn_tty_rcv_skb(i, di, channel, skb)) return; wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]); } else isdn_trash_skb(skb, FREE_READ); } /* * Intercept command from Linklevel to Lowlevel. */ int isdn_command(isdn_ctrl *cmd) { return dev->drv[cmd->driver]->interface->command(cmd); } void isdn_all_eaz(int di, int ch) { isdn_ctrl cmd; if (di < 0) return; cmd.driver = di; cmd.arg = ch; cmd.command = ISDN_CMD_SETEAZ; cmd.parm.num[0] = '\0'; isdn_command(&cmd); } static int isdn_status_callback(isdn_ctrl * c) { int di; ulong flags; int i; int r; int retval = 0; isdn_ctrl cmd; di = c->driver; i = isdn_dc2minor(di, c->arg); switch (c->command) { case ISDN_STAT_BSENT: if (i < 0) return -1; if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; if (isdn_net_stat_callback(i, c)) return 0; if (isdn_tty_stat_callback(i, c)) return 0; wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]); break; case ISDN_STAT_STAVAIL: save_flags(flags); cli(); dev->drv[di]->stavail += c->arg; restore_flags(flags); wake_up_interruptible(&dev->drv[di]->st_waitq); break; case ISDN_STAT_RUN: dev->drv[di]->flags |= DRV_FLAG_RUNNING; for (i = 0; i < ISDN_MAX_CHANNELS; i++) if (dev->drvmap[i] == di) isdn_all_eaz(di, dev->chanmap[i]); break; case ISDN_STAT_STOP: dev->drv[di]->flags &= ~DRV_FLAG_RUNNING; break; case ISDN_STAT_ICALL: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num); #endif if (dev->global_flags & ISDN_GLOBAL_STOPPED) { cmd.driver = di; cmd.arg = c->arg; cmd.command = ISDN_CMD_HANGUP; isdn_command(&cmd); return 0; } /* Try to find a network-interface which will accept incoming call */ r = isdn_net_find_icall(di, c, i); switch (r) { case 0: /* No network-device replies. * Try ttyI's */ if (isdn_tty_find_icall(di, c) >= 0) retval = 1; else if (dev->drv[di]->flags & DRV_FLAG_REJBUS) { cmd.driver = di; cmd.arg = c->arg; cmd.command = ISDN_CMD_HANGUP; isdn_command(&cmd); retval = 2; } break; case 1: /* Schedule connection-setup */ isdn_net_dial(); cmd.driver = di; cmd.arg = c->arg; cmd.command = ISDN_CMD_ACCEPTD; isdn_command(&cmd); retval = 1; break; case 2: /* For calling back, first reject incoming call ... */ case 3: /* Interface found, but down, reject call actively */ retval = 2; printk(KERN_INFO "isdn: Rejecting Call\n"); cmd.driver = di; cmd.arg = c->arg; cmd.command = ISDN_CMD_HANGUP; isdn_command(&cmd); if (r == 3) break; /* Fall through */ case 4: /* ... then start callback. */ isdn_net_dial(); break; } return retval; break; case ISDN_STAT_CINF: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num); #endif if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; if (strcmp(c->parm.num, "0")) isdn_net_stat_callback(i, c); break; case ISDN_STAT_CAUSE: #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num); #endif printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n", dev->drvid[di], c->arg, c->parm.num); isdn_tty_stat_callback(i, c); break; case ISDN_STAT_DCONN: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "DCONN: %ld\n", c->arg); #endif if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; /* Find any net-device, waiting for D-channel setup */ if (isdn_net_stat_callback(i, c)) break; /* Find any ttyI, waiting for D-channel setup */ if (isdn_tty_stat_callback(i, c)) { cmd.driver = di; cmd.arg = c->arg; cmd.command = ISDN_CMD_ACCEPTB; isdn_command(&cmd); break; } break; case ISDN_STAT_DHUP: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "DHUP: %ld\n", c->arg); #endif if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; dev->drv[di]->online &= ~(1 << (c->arg)); isdn_info_update(); /* Signal hangup to network-devices */ if (isdn_net_stat_callback(i, c)) break; if (isdn_tty_stat_callback(i, c)) break; break; case ISDN_STAT_BCONN: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "BCONN: %ld\n", c->arg); #endif /* Signal B-channel-connect to network-devices */ if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; dev->drv[di]->online |= (1 << (c->arg)); isdn_info_update(); if (isdn_net_stat_callback(i, c)) break; if (isdn_tty_stat_callback(i, c)) break; break; case ISDN_STAT_BHUP: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "BHUP: %ld\n", c->arg); #endif if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; dev->drv[di]->online &= ~(1 << (c->arg)); isdn_info_update(); if (isdn_tty_stat_callback(i, c)) break; break; case ISDN_STAT_NODCH: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "NODCH: %ld\n", c->arg); #endif if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; if (isdn_net_stat_callback(i, c)) break; if (isdn_tty_stat_callback(i, c)) break; break; case ISDN_STAT_ADDCH: break; case ISDN_STAT_UNLOAD: save_flags(flags); cli(); isdn_tty_stat_callback(i, c); for (i = 0; i < ISDN_MAX_CHANNELS; i++) if (dev->drvmap[i] == di) { dev->drvmap[i] = -1; dev->chanmap[i] = -1; } dev->drivers--; dev->channels -= dev->drv[di]->channels; kfree(dev->drv[di]->rcverr); kfree(dev->drv[di]->rcvcount); for (i = 0; i < dev->drv[di]->channels; i++) isdn_free_queue(&dev->drv[di]->rpqueue[i]); kfree(dev->drv[di]->rpqueue); kfree(dev->drv[di]->rcv_waitq); kfree(dev->drv[di]->snd_waitq); kfree(dev->drv[di]); dev->drv[di] = NULL; dev->drvid[di][0] = '\0'; isdn_info_update(); restore_flags(flags); return 0; default: return -1; } return 0; } /* * Get integer from char-pointer, set pointer to end of number */ int isdn_getnum(char **p) { int v = -1; while (*p[0] >= '0' && *p[0] <= '9') v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0'); return v; } #define DLE 0x10 /* * isdn_readbchan() tries to get data from the read-queue. * It MUST be called with interrupts off. */ int isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, int user) { int left; int count; int count_pull; int count_put; int dflag; struct sk_buff *skb; u_char *cp; if (!dev->drv[di]) return 0; if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) { if (user) interruptible_sleep_on(&dev->drv[di]->rcv_waitq[channel]); else return 0; } left = MIN(len, dev->drv[di]->rcvcount[channel]); cp = buf; count = 0; while (left) { if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel]))) break; #ifdef CONFIG_ISDN_AUDIO if (ISDN_AUDIO_SKB_LOCK(skb)) break; ISDN_AUDIO_SKB_LOCK(skb) = 1; if (ISDN_AUDIO_SKB_DLECOUNT(skb)) { char *p = skb->data; unsigned long DLEmask = (1 << channel); dflag = 0; count_pull = count_put = 0; while ((count_pull < skb->len) && (left-- > 0)) { if (dev->drv[di]->DLEflag & DLEmask) { if (user) put_user(DLE, cp++); else *cp++ = DLE; dev->drv[di]->DLEflag &= ~DLEmask; } else { if (user) put_user(*p, cp++); else *cp++ = *p; if (*p == DLE) { dev->drv[di]->DLEflag |= DLEmask; (ISDN_AUDIO_SKB_DLECOUNT(skb))--; } p++; count_pull++; } count_put++; } if (count_pull >= skb->len) dflag = 1; } else { #endif /* No DLE's in buff, so simply copy it */ dflag = 1; if ((count_pull = skb->len) > left) { count_pull = left; dflag = 0; } count_put = count_pull; if (user) copy_to_user(cp, skb->data, count_put); else memcpy(cp, skb->data, count_put); cp += count_put; left -= count_put; #ifdef CONFIG_ISDN_AUDIO } #endif count += count_put; if (fp) { memset(fp, 0, count_put); fp += count_put; } if (dflag) { /* We got all the data in this buff. * Now we can dequeue it. */ if (fp) *(fp - 1) = 0xff; #ifdef CONFIG_ISDN_AUDIO ISDN_AUDIO_SKB_LOCK(skb) = 0; #endif skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]); isdn_trash_skb(skb, FREE_READ); } else { /* Not yet emptied this buff, so it * must stay in the queue, for further calls * but we pull off the data we got until now. */ skb_pull(skb, count_pull); #ifdef CONFIG_ISDN_AUDIO ISDN_AUDIO_SKB_LOCK(skb) = 0; #endif } dev->drv[di]->rcvcount[channel] -= count_put; } return count; } static __inline int isdn_minor2drv(int minor) { return (dev->drvmap[minor]); } static __inline int isdn_minor2chan(int minor) { return (dev->chanmap[minor]); } #define INF_DV 0x01 /* Data version for /dev/isdninfo */ static char * isdn_statstr(void) { static char istatbuf[2048]; char *p; int i; sprintf(istatbuf, "idmap:\t"); p = istatbuf + strlen(istatbuf); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]); p = istatbuf + strlen(istatbuf); } sprintf(p, "\nchmap:\t"); p = istatbuf + strlen(istatbuf); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { sprintf(p, "%d ", dev->chanmap[i]); p = istatbuf + strlen(istatbuf); } sprintf(p, "\ndrmap:\t"); p = istatbuf + strlen(istatbuf); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { sprintf(p, "%d ", dev->drvmap[i]); p = istatbuf + strlen(istatbuf); } sprintf(p, "\nusage:\t"); p = istatbuf + strlen(istatbuf); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { sprintf(p, "%d ", dev->usage[i]); p = istatbuf + strlen(istatbuf); } sprintf(p, "\nflags:\t"); p = istatbuf + strlen(istatbuf); for (i = 0; i < ISDN_MAX_DRIVERS; i++) { if (dev->drv[i]) { sprintf(p, "%ld ", dev->drv[i]->online); p = istatbuf + strlen(istatbuf); } else { sprintf(p, "? "); p = istatbuf + strlen(istatbuf); } } sprintf(p, "\nphone:\t"); p = istatbuf + strlen(istatbuf); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { sprintf(p, "%s ", dev->num[i]); p = istatbuf + strlen(istatbuf); } sprintf(p, "\n"); return istatbuf; } /* Module interface-code */ void isdn_info_update(void) { infostruct *p = dev->infochain; while (p) { *(p->private) = 1; p = (infostruct *) p->next; } wake_up_interruptible(&(dev->info_waitq)); } static RWTYPE isdn_read(struct inode *inode, struct file *file, char *buf, RWARG count) { uint minor = MINOR(inode->i_rdev); int len = 0; ulong flags; int drvidx; int chidx; if (minor == ISDN_MINOR_STATUS) { char *p; if (!file->private_data) { if (file->f_flags & O_NONBLOCK) return -EAGAIN; interruptible_sleep_on(&(dev->info_waitq)); } p = isdn_statstr(); file->private_data = 0; if ((len = strlen(p)) <= count) { if (copy_to_user(buf, p, len)) return -EFAULT; file->f_pos += len; return len; } return 0; } if (!dev->drivers) return -ENODEV; if (minor < ISDN_MINOR_CTRL) { drvidx = isdn_minor2drv(minor); if (drvidx < 0) return -ENODEV; if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) return -ENODEV; chidx = isdn_minor2chan(minor); save_flags(flags); cli(); len = isdn_readbchan(drvidx, chidx, buf, 0, count, 1); file->f_pos += len; restore_flags(flags); return len; } if (minor <= ISDN_MINOR_CTRLMAX) { drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL); if (drvidx < 0) return -ENODEV; if (!dev->drv[drvidx]->stavail) { if (file->f_flags & O_NONBLOCK) return -EAGAIN; interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq)); } if (dev->drv[drvidx]->interface->readstat) len = dev->drv[drvidx]->interface-> readstat(buf, MIN(count, dev->drv[drvidx]->stavail), 1, drvidx, isdn_minor2chan(minor)); else len = 0; save_flags(flags); cli(); if (len) dev->drv[drvidx]->stavail -= len; else dev->drv[drvidx]->stavail = 0; restore_flags(flags); file->f_pos += len; return len; } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) return (isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count)); #endif return -ENODEV; } static LSTYPE isdn_lseek(struct inode *inode, struct file *file, LSARG offset, int orig) { return -ESPIPE; } static RWTYPE isdn_write(struct inode *inode, struct file *file, const char *buf, RWARG count) { uint minor = MINOR(inode->i_rdev); int drvidx; int chidx; if (minor == ISDN_MINOR_STATUS) return -EPERM; if (!dev->drivers) return -ENODEV; if (minor < ISDN_MINOR_CTRL) { drvidx = isdn_minor2drv(minor); if (drvidx < 0) return -ENODEV; if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) return -ENODEV; chidx = isdn_minor2chan(minor); while (isdn_writebuf_stub(drvidx, chidx, buf, count, 1) != count) interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]); return count; } if (minor <= ISDN_MINOR_CTRLMAX) { drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL); if (drvidx < 0) return -ENODEV; /* * We want to use the isdnctrl device to load the firmware * if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) return -ENODEV; */ if (dev->drv[drvidx]->interface->writecmd) return (dev->drv[drvidx]->interface-> writecmd(buf, count, 1, drvidx, isdn_minor2chan(minor))); else return count; } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) return (isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count)); #endif return -ENODEV; } #if (LINUX_VERSION_CODE < 0x020117) static int isdn_select(struct inode *inode, struct file *file, int type, select_table * st) { uint minor = MINOR(inode->i_rdev); int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL); if (minor == ISDN_MINOR_STATUS) { if (file->private_data) return 1; else { if (st) select_wait(&(dev->info_waitq), st); return 0; } } if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) { if (drvidx < 0) return -ENODEV; if (dev->drv[drvidx]->stavail) return 1; else { if (st) select_wait(&(dev->drv[drvidx]->st_waitq), st); return 0; } return 1; } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) return (isdn_ppp_select(minor - ISDN_MINOR_PPP, file, type, st)); #endif return -ENODEV; } #else static unsigned int isdn_poll(struct file *file, poll_table * wait) { unsigned int mask = 0; unsigned int minor = MINOR(file->f_inode->i_rdev); int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL); if (minor == ISDN_MINOR_STATUS) { poll_wait(&(dev->info_waitq), wait); /* mask = POLLOUT | POLLWRNORM; */ if (file->private_data) { mask |= POLLIN | POLLRDNORM; } return mask; } if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) { poll_wait(&(dev->drv[drvidx]->st_waitq), wait); if (drvidx < 0) { printk(KERN_ERR "isdn_common: isdn_poll 1 -> what the hell\n"); return POLLERR; } mask = POLLOUT | POLLWRNORM; if (dev->drv[drvidx]->stavail) { mask |= POLLIN | POLLRDNORM; } return mask; } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) return (isdn_ppp_poll(file, wait)); #endif printk(KERN_ERR "isdn_common: isdn_poll 2 -> what the hell\n"); return POLLERR; } #endif typedef union { char name[10]; char bname[22]; isdn_ioctl_struct iocts; isdn_net_ioctl_phone phone; isdn_net_ioctl_cfg cfg; } iocpar_t; static int isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg) { uint minor = MINOR(inode->i_rdev); isdn_ctrl c; int drvidx; int chidx; int ret; int i; char *p; char *s; iocpar_t *iocpar; #define name iocpar->name #define bname iocpar->bname #define iocts iocpar->iocts #define phone iocpar->phone #define cfg iocpar->cfg #define RETURN(r) ({ ret = r; kfree(iocpar); return ret; }) if (minor == ISDN_MINOR_STATUS) { switch (cmd) { case IIOCGETDVR: return (TTY_DV + (NET_DV << 8) + (INF_DV << 16)); case IIOCGETCPS: if (arg) { ulong *p = (ulong *) arg; int i; if ((ret = verify_area(VERIFY_WRITE, (void *) arg, sizeof(ulong) * ISDN_MAX_CHANNELS * 2))) return ret; for (i = 0; i < ISDN_MAX_CHANNELS; i++) { put_user(dev->ibytes[i], p++); put_user(dev->obytes[i], p++); } return 0; } else return -EINVAL; break; default: return -EINVAL; } } if (!dev->drivers) return -ENODEV; if (minor < ISDN_MINOR_CTRL) { drvidx = isdn_minor2drv(minor); if (drvidx < 0) return -ENODEV; chidx = isdn_minor2chan(minor); if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) return -ENODEV; return 0; } if (minor <= ISDN_MINOR_CTRLMAX) { if ((iocpar = (iocpar_t *)kmalloc(sizeof(iocpar_t), GFP_KERNEL)) == NULL) { printk(KERN_WARNING "isdn: Out of memory in isdn_ioctl\n"); return -ENOMEM; } switch (cmd) { #ifdef CONFIG_NETDEVICES case IIOCNETAIF: /* Add a network-interface */ if (arg) { if ((ret = copy_from_user(name, (char *) arg, sizeof(name)))) RETURN(ret); s = name; } else s = NULL; if ((s = isdn_net_new(s, NULL))) { if ((ret = copy_to_user((char *) arg, s, strlen(s) + 1))) RETURN(ret); RETURN(0); } else RETURN(-ENODEV); case IIOCNETASL: /* Add a slave to a network-interface */ if (arg) { if ((ret = copy_from_user(bname, (char *) arg, sizeof(bname) - 1))) RETURN(ret); } else RETURN(-EINVAL); if ((s = isdn_net_newslave(bname))) { if ((ret = copy_to_user((char *) arg, s, strlen(s) + 1))) RETURN(ret); RETURN(0); } else RETURN(-ENODEV); case IIOCNETDIF: /* Delete a network-interface */ if (arg) { if ((ret = copy_from_user(name, (char *) arg, sizeof(name)))) RETURN(ret); RETURN(isdn_net_rm(name)); } else RETURN(-EINVAL); case IIOCNETSCF: /* Set configurable parameters of a network-interface */ if (arg) { if ((ret = copy_from_user((char *) &cfg, (char *) arg, sizeof(cfg)))) RETURN(ret); RETURN(isdn_net_setcfg(&cfg)); } else RETURN(-EINVAL); case IIOCNETGCF: /* Get configurable parameters of a network-interface */ if (arg) { if ((ret = copy_from_user((char *) &cfg, (char *) arg, sizeof(cfg)))) RETURN(ret); if (!(ret = isdn_net_getcfg(&cfg))) { if ((ret = copy_to_user((char *) arg, (char *) &cfg, sizeof(cfg)))) RETURN(ret); } RETURN(ret); } else RETURN(-EINVAL); case IIOCNETANM: /* Add a phone-number to a network-interface */ if (arg) { if ((ret = copy_from_user((char *) &phone, (char *) arg, sizeof(phone)))) RETURN(ret); RETURN(isdn_net_addphone(&phone)); } else RETURN(-EINVAL); case IIOCNETGNM: /* Get list of phone-numbers of a network-interface */ if (arg) { if ((ret = copy_from_user((char *) &phone, (char *) arg, sizeof(phone)))) RETURN(ret); RETURN(isdn_net_getphones(&phone, (char *) arg)); } else RETURN(-EINVAL); case IIOCNETDNM: /* Delete a phone-number of a network-interface */ if (arg) { if ((ret = copy_from_user((char *) &phone, (char *) arg, sizeof(phone)))) RETURN(ret); RETURN(isdn_net_delphone(&phone)); } else RETURN(-EINVAL); case IIOCNETDIL: /* Force dialing of a network-interface */ if (arg) { if ((ret = copy_from_user(name, (char *) arg, sizeof(name)))) RETURN(ret); RETURN(isdn_net_force_dial(name)); } else RETURN(-EINVAL); #ifdef CONFIG_ISDN_PPP case IIOCNETALN: if (!arg) RETURN(-EINVAL); if ((ret = copy_from_user(name, (char *) arg, sizeof(name)))) RETURN(ret); RETURN(isdn_ppp_dial_slave(name)); case IIOCNETDLN: if (!arg) RETURN(-EINVAL); if ((ret = copy_from_user(name, (char *) arg, sizeof(name)))) RETURN(ret); RETURN(isdn_ppp_hangup_slave(name)); #endif case IIOCNETHUP: /* Force hangup of a network-interface */ if (!arg) RETURN(-EINVAL); if ((ret = copy_from_user(name, (char *) arg, sizeof(name)))) RETURN(ret); RETURN(isdn_net_force_hangup(name)); break; #endif /* CONFIG_NETDEVICES */ case IIOCSETVER: dev->net_verbose = arg; printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose); RETURN(0); case IIOCSETGST: if (arg) dev->global_flags |= ISDN_GLOBAL_STOPPED; else dev->global_flags &= ~ISDN_GLOBAL_STOPPED; printk(KERN_INFO "isdn: Global Mode %s\n", (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running"); RETURN(0); case IIOCSETBRJ: drvidx = -1; if (arg) { int i; char *p; if ((ret = copy_from_user((char *) &iocts, (char *) arg, sizeof(isdn_ioctl_struct)))) RETURN(ret); if (strlen(iocts.drvid)) { if ((p = strchr(iocts.drvid, ','))) *p = 0; drvidx = -1; for (i = 0; i < ISDN_MAX_DRIVERS; i++) if (!(strcmp(dev->drvid[i], iocts.drvid))) { drvidx = i; break; } } } if (drvidx == -1) RETURN(-ENODEV); if (iocts.arg) dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS; else dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS; RETURN(0); case IIOCSIGPRF: dev->profd = current; RETURN(0); break; case IIOCGETPRF: /* Get all Modem-Profiles */ if (arg) { char *p = (char *) arg; int i; if ((ret = verify_area(VERIFY_WRITE, (void *) arg, (ISDN_MODEM_ANZREG + ISDN_MSNLEN) * ISDN_MAX_CHANNELS))) RETURN(ret); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { if (copy_to_user(p, dev->mdm.info[i].emu.profile, ISDN_MODEM_ANZREG)) RETURN(-EFAULT); p += ISDN_MODEM_ANZREG; if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN)) RETURN(-EFAULT); p += ISDN_MSNLEN; } RETURN((ISDN_MODEM_ANZREG + ISDN_MSNLEN) * ISDN_MAX_CHANNELS); } else RETURN(-EINVAL); break; case IIOCSETPRF: /* Set all Modem-Profiles */ if (arg) { char *p = (char *) arg; int i; if ((ret = verify_area(VERIFY_READ, (void *) arg, (ISDN_MODEM_ANZREG + ISDN_MSNLEN) * ISDN_MAX_CHANNELS))) RETURN(ret); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { if ((ret = copy_from_user(dev->mdm.info[i].emu.profile, p, ISDN_MODEM_ANZREG))) RETURN(ret); p += ISDN_MODEM_ANZREG; if ((ret = copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))) RETURN(ret); p += ISDN_MSNLEN; } RETURN(0); } else RETURN(-EINVAL); break; case IIOCSETMAP: case IIOCGETMAP: /* Set/Get MSN->EAZ-Mapping for a driver */ if (arg) { if ((ret = copy_from_user((char *) &iocts, (char *) arg, sizeof(isdn_ioctl_struct)))) RETURN(ret); if (strlen(iocts.drvid)) { drvidx = -1; for (i = 0; i < ISDN_MAX_DRIVERS; i++) if (!(strcmp(dev->drvid[i], iocts.drvid))) { drvidx = i; break; } } else drvidx = 0; if (drvidx == -1) RETURN(-ENODEV); if (cmd == IIOCSETMAP) { int loop = 1; p = (char *) iocts.arg; i = 0; while (loop) { int j = 0; while (1) { if ((ret = verify_area(VERIFY_READ, p, 1))) RETURN(ret); GET_USER(bname[j], p++); switch (bname[j]) { case '\0': loop = 0; /* Fall through */ case ',': bname[j] = '\0'; strcpy(dev->drv[drvidx]->msn2eaz[i], bname); j = ISDN_MSNLEN; break; default: j++; } if (j >= ISDN_MSNLEN) break; } if (++i > 9) break; } } else { p = (char *) iocts.arg; for (i = 0; i < 10; i++) { sprintf(bname, "%s%s", strlen(dev->drv[drvidx]->msn2eaz[i]) ? dev->drv[drvidx]->msn2eaz[i] : "-", (i < 9) ? "," : "\0"); if ((ret = copy_to_user(p, bname, strlen(bname) + 1))) RETURN(ret); p += strlen(bname); } } RETURN(0); } else RETURN(-EINVAL); case IIOCDBGVAR: if (arg) { if ((ret = copy_to_user((char *) arg, (char *) &dev, sizeof(ulong)))) RETURN(ret); RETURN(0); } else RETURN(-EINVAL); break; default: if ((cmd & IIOCDRVCTL) == IIOCDRVCTL) cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK; else RETURN(-EINVAL); if (arg) { int i; char *p; if ((ret = copy_from_user((char *) &iocts, (char *) arg, sizeof(isdn_ioctl_struct)))) RETURN(ret); if (strlen(iocts.drvid)) { if ((p = strchr(iocts.drvid, ','))) *p = 0; drvidx = -1; for (i = 0; i < ISDN_MAX_DRIVERS; i++) if (!(strcmp(dev->drvid[i], iocts.drvid))) { drvidx = i; break; } } else drvidx = 0; if (drvidx == -1) RETURN(-ENODEV); if ((ret = verify_area(VERIFY_WRITE, (void *) arg, sizeof(isdn_ioctl_struct)))) RETURN(ret); c.driver = drvidx; c.command = ISDN_CMD_IOCTL; c.arg = cmd; memcpy(c.parm.num, (char *) &iocts.arg, sizeof(ulong)); ret = isdn_command(&c); memcpy((char *) &iocts.arg, c.parm.num, sizeof(ulong)); if ((copy_to_user((char *) arg, &iocts, sizeof(isdn_ioctl_struct)))) RETURN(-EFAULT); RETURN(ret); } else RETURN(-EINVAL); } } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg)); #endif return -ENODEV; #undef name #undef bname #undef iocts #undef phone #undef cfg #undef RETURN } /* * Open the device code. * MOD_INC_USE_COUNT make sure that the driver memory is not freed * while the device is in use. */ static int isdn_open(struct inode *ino, struct file *filep) { uint minor = MINOR(ino->i_rdev); int drvidx; int chidx; if (minor == ISDN_MINOR_STATUS) { infostruct *p; if ((p = (infostruct *) kmalloc(sizeof(infostruct), GFP_KERNEL))) { MOD_INC_USE_COUNT; p->next = (char *) dev->infochain; p->private = (char *) &(filep->private_data); dev->infochain = p; /* At opening we allow a single update */ filep->private_data = (char *) 1; return 0; } else return -ENOMEM; } if (!dev->channels) return -ENODEV; if (minor < ISDN_MINOR_CTRL) { drvidx = isdn_minor2drv(minor); if (drvidx < 0) return -ENODEV; chidx = isdn_minor2chan(minor); if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) return -ENODEV; if (!(dev->drv[drvidx]->online & (1 << chidx))) return -ENODEV; isdn_MOD_INC_USE_COUNT(); return 0; } if (minor <= ISDN_MINOR_CTRLMAX) { drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL); if (drvidx < 0) return -ENODEV; isdn_MOD_INC_USE_COUNT(); return 0; } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) { int ret; if (!(ret = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep))) isdn_MOD_INC_USE_COUNT(); return ret; } #endif return -ENODEV; } static CLOSETYPE isdn_close(struct inode *ino, struct file *filep) { uint minor = MINOR(ino->i_rdev); if (minor == ISDN_MINOR_STATUS) { infostruct *p = dev->infochain; infostruct *q = NULL; MOD_DEC_USE_COUNT; while (p) { if (p->private == (char *) &(filep->private_data)) { if (q) q->next = p->next; else dev->infochain = (infostruct *) (p->next); kfree(p); return CLOSEVAL; } q = p; p = (infostruct *) (p->next); } printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n"); return CLOSEVAL; } isdn_MOD_DEC_USE_COUNT(); if (minor < ISDN_MINOR_CTRL) return CLOSEVAL; if (minor <= ISDN_MINOR_CTRLMAX) { if (dev->profd == current) dev->profd = NULL; return CLOSEVAL; } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) isdn_ppp_release(minor - ISDN_MINOR_PPP, filep); #endif return CLOSEVAL; } static struct file_operations isdn_fops = { isdn_lseek, isdn_read, isdn_write, NULL, /* isdn_readdir */ #if (LINUX_VERSION_CODE < 0x020117) isdn_select, /* isdn_select */ #else isdn_poll, /* isdn_poll */ #endif isdn_ioctl, /* isdn_ioctl */ NULL, /* isdn_mmap */ isdn_open, isdn_close, NULL /* fsync */ }; char * isdn_map_eaz2msn(char *msn, int di) { driver *this = dev->drv[di]; int i; if (strlen(msn) == 1) { i = msn[0] - '0'; if ((i >= 0) && (i <= 9)) if (strlen(this->msn2eaz[i])) return (this->msn2eaz[i]); } return (msn); } /* * Find an unused ISDN-channel, whose feature-flags match the * given L2- and L3-protocols. */ int isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev ,int pre_chan) { int i; ulong flags; ulong features; save_flags(flags); cli(); features = (1 << l2_proto) | (0x100 << l3_proto); for (i = 0; i < ISDN_MAX_CHANNELS; i++) if (USG_NONE(dev->usage[i]) && (dev->drvmap[i] != -1)) { int d = dev->drvmap[i]; if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) && ((pre_dev != d) || (pre_chan != dev->chanmap[i]))) continue; if (dev->drv[d]->flags & DRV_FLAG_RUNNING) { if ((dev->drv[d]->interface->features & features) == features) { if ((pre_dev < 0) || (pre_chan < 0)) { dev->usage[i] &= ISDN_USAGE_EXCLUSIVE; dev->usage[i] |= usage; isdn_info_update(); restore_flags(flags); return i; } else { if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) { dev->usage[i] &= ISDN_USAGE_EXCLUSIVE; dev->usage[i] |= usage; isdn_info_update(); restore_flags(flags); return i; } } } } } restore_flags(flags); return -1; } /* * Set state of ISDN-channel to 'unused' */ void isdn_free_channel(int di, int ch, int usage) { int i; ulong flags; isdn_ctrl cmd; save_flags(flags); cli(); for (i = 0; i < ISDN_MAX_CHANNELS; i++) if (((dev->usage[i] & ISDN_USAGE_MASK) == usage) && (dev->drvmap[i] == di) && (dev->chanmap[i] == ch)) { dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE); strcpy(dev->num[i], "???"); dev->ibytes[i] = 0; dev->obytes[i] = 0; isdn_info_update(); isdn_free_queue(&dev->drv[di]->rpqueue[ch]); cmd.driver = di; cmd.arg = ch; cmd.command = ISDN_CMD_HANGUP; restore_flags(flags); isdn_command(&cmd); return; } printk(KERN_DEBUG "Unmatched free_channel d=%d c=%d u=%d\n", di, ch, usage); restore_flags(flags); } /* * Cancel Exclusive-Flag for ISDN-channel */ void isdn_unexclusive_channel(int di, int ch) { int i; ulong flags; save_flags(flags); cli(); for (i = 0; i < ISDN_MAX_CHANNELS; i++) if ((dev->drvmap[i] == di) && (dev->chanmap[i] == ch)) { dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE; isdn_info_update(); restore_flags(flags); return; } restore_flags(flags); } /* * receive callback handler for drivers not supporting sk_buff's. * Parameters: * * di = Driver-Index. * channel = Number of B-Channel (0...) * buf = pointer to packet-data * len = Length of packet-data * */ static void isdn_receive_callback(int drvidx, int chan, u_char * buf, int len) { struct sk_buff *skb; if (dev->global_flags & ISDN_GLOBAL_STOPPED) return; skb = dev_alloc_skb(len); if (skb) { memcpy(skb_put(skb, len), buf, len); isdn_receive_skb_callback(drvidx, chan, skb); } else printk(KERN_WARNING "isdn: rcv alloc_skb failed, packet dropped.\n"); } /* * writebuf replacement for SKB_ABLE drivers */ static int isdn_writebuf_stub(int drvidx, int chan, const u_char * buf, int len, int user) { int ret; if (dev->drv[drvidx]->interface->writebuf) ret = dev->drv[drvidx]->interface->writebuf(drvidx, chan, buf, len, user); else { struct sk_buff *skb; skb = alloc_skb(dev->drv[drvidx]->interface->hl_hdrlen + len, GFP_ATOMIC); if (skb == NULL) return 0; skb_reserve(skb, dev->drv[drvidx]->interface->hl_hdrlen); SET_SKB_FREE(skb); if (user) copy_from_user(skb_put(skb, len), buf, len); else memcpy(skb_put(skb, len), buf, len); ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, skb); if (ret <= 0) kfree_skb(skb, FREE_WRITE); } if (ret > 0) dev->obytes[isdn_dc2minor(drvidx, chan)] += ret; return ret; } /* * writebuf_skb replacement for NON SKB_ABLE drivers * If lowlevel-device does not support supports skbufs, use * standard send-routine, else sind directly. * * Return: length of data on success, -ERRcode on failure. */ int isdn_writebuf_skb_stub(int drvidx, int chan, struct sk_buff *skb) { int ret; int len = skb->len; /* skb pointer no longer valid after free */ if (dev->drv[drvidx]->interface->writebuf_skb) ret = dev->drv[drvidx]->interface-> writebuf_skb(drvidx, chan, skb); else { if ((ret = dev->drv[drvidx]->interface-> writebuf(drvidx, chan, skb->data, skb->len, 0)) == len) dev_kfree_skb(skb, FREE_WRITE); } if (ret > 0) dev->obytes[isdn_dc2minor(drvidx, chan)] += len; return ret; } /* * Low-level-driver registration */ int register_isdn(isdn_if * i) { driver *d; int n, j, k; ulong flags; int drvidx; if (dev->drivers >= ISDN_MAX_DRIVERS) { printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n", ISDN_MAX_DRIVERS); return 0; } n = i->channels; if (dev->channels + n > ISDN_MAX_CHANNELS) { printk(KERN_WARNING "register_isdn: Max. %d channels supported\n", ISDN_MAX_CHANNELS); return 0; } if ((!i->writebuf_skb) && (!i->writebuf)) { printk(KERN_WARNING "register_isdn: No write routine given.\n"); return 0; } if (!(d = (driver *) kmalloc(sizeof(driver), GFP_KERNEL))) { printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n"); return 0; } memset((char *) d, 0, sizeof(driver)); if (!(d->rcverr = (int *) kmalloc(sizeof(int) * n, GFP_KERNEL))) { printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n"); kfree(d); return 0; } memset((char *) d->rcverr, 0, sizeof(int) * n); if (!(d->rcvcount = (int *) kmalloc(sizeof(int) * n, GFP_KERNEL))) { printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n"); kfree(d->rcverr); kfree(d); return 0; } memset((char *) d->rcvcount, 0, sizeof(int) * n); if (!(d->rpqueue = (struct sk_buff_head *) kmalloc(sizeof(struct sk_buff_head) * n, GFP_KERNEL))) { printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n"); kfree(d->rcvcount); kfree(d->rcverr); kfree(d); return 0; } for (j = 0; j < n; j++) { skb_queue_head_init(&d->rpqueue[j]); } if (!(d->rcv_waitq = (struct wait_queue **) kmalloc(sizeof(struct wait_queue *) * n, GFP_KERNEL))) { printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n"); kfree(d->rpqueue); kfree(d->rcvcount); kfree(d->rcverr); kfree(d); return 0; } memset((char *) d->rcv_waitq, 0, sizeof(struct wait_queue *) * n); if (!(d->snd_waitq = (struct wait_queue **) kmalloc(sizeof(struct wait_queue *) * n, GFP_KERNEL))) { printk(KERN_WARNING "register_isdn: Could not alloc snd_waitq\n"); kfree(d->rcv_waitq); kfree(d->rpqueue); kfree(d->rcvcount); kfree(d->rcverr); kfree(d); return 0; } memset((char *) d->snd_waitq, 0, sizeof(struct wait_queue *) * n); d->channels = n; d->maxbufsize = i->maxbufsize; d->pktcount = 0; d->stavail = 0; d->flags = DRV_FLAG_LOADED; d->online = 0; d->interface = i; for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) if (!dev->drv[drvidx]) break; i->channels = drvidx; i->rcvcallb_skb = isdn_receive_skb_callback; i->rcvcallb = isdn_receive_callback; i->statcallb = isdn_status_callback; if (!strlen(i->id)) sprintf(i->id, "line%d", drvidx); save_flags(flags); cli(); for (j = 0; j < drvidx; j++) if (!strcmp(i->id, dev->drvid[j])) sprintf(i->id, "line%d", drvidx); for (j = 0; j < n; j++) for (k = 0; k < ISDN_MAX_CHANNELS; k++) if (dev->chanmap[k] < 0) { dev->chanmap[k] = j; dev->drvmap[k] = drvidx; break; } dev->drv[drvidx] = d; dev->channels += n; strcpy(dev->drvid[drvidx], i->id); isdn_info_update(); dev->drivers++; restore_flags(flags); return 1; } /* ***************************************************************************** * And now the modules code. ***************************************************************************** */ extern int printk(const char *fmt,...); #ifdef MODULE #define isdn_init init_module #endif static char * isdn_getrev(const char *revision) { char *rev; char *p; if ((p = strchr(revision, ':'))) { rev = p + 2; p = strchr(rev, '$'); *--p = 0; } else rev = "???"; return rev; } /* * Allocate and initialize all data, register modem-devices */ int isdn_init(void) { int i; char irev[50]; char trev[50]; char nrev[50]; char prev[50]; char arev[50]; sti(); if (!(dev = (isdn_dev *) kmalloc(sizeof(isdn_dev), GFP_KERNEL))) { printk(KERN_WARNING "isdn: Could not allocate device-struct.\n"); return -EIO; } memset((char *) dev, 0, sizeof(isdn_dev)); init_timer(&dev->timer); dev->timer.function = isdn_timer_funct; for (i = 0; i < ISDN_MAX_CHANNELS; i++) { dev->drvmap[i] = -1; dev->chanmap[i] = -1; dev->m_idx[i] = -1; strcpy(dev->num[i], "???"); } if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) { printk(KERN_WARNING "isdn: Could not register control devices\n"); kfree(dev); return -EIO; } if ((i = isdn_tty_modem_init()) < 0) { printk(KERN_WARNING "isdn: Could not register tty devices\n"); if (i == -3) tty_unregister_driver(&dev->mdm.cua_modem); if (i <= -2) tty_unregister_driver(&dev->mdm.tty_modem); kfree(dev); unregister_chrdev(ISDN_MAJOR, "isdn"); return -EIO; } #ifdef CONFIG_ISDN_PPP if (isdn_ppp_init() < 0) { printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n"); tty_unregister_driver(&dev->mdm.tty_modem); tty_unregister_driver(&dev->mdm.cua_modem); for (i = 0; i < ISDN_MAX_CHANNELS; i++) kfree(dev->mdm.info[i].xmit_buf - 4); unregister_chrdev(ISDN_MAJOR, "isdn"); kfree(dev); return -EIO; } #endif /* CONFIG_ISDN_PPP */ isdn_export_syms(); strcpy(irev, isdn_revision); strcpy(trev, isdn_tty_revision); strcpy(nrev, isdn_net_revision); strcpy(prev, isdn_ppp_revision); strcpy(arev, isdn_audio_revision); printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(irev)); printk("%s/", isdn_getrev(trev)); printk("%s/", isdn_getrev(nrev)); printk("%s/", isdn_getrev(prev)); printk("%s", isdn_getrev(arev)); #ifdef MODULE printk(" loaded\n"); #else printk("\n"); isdn_cards_init(); #endif isdn_info_update(); return 0; } #ifdef MODULE /* * Unload module */ void cleanup_module(void) { int flags; int i; #ifdef CONFIG_ISDN_PPP isdn_ppp_cleanup(); #endif save_flags(flags); cli(); if (isdn_net_rmall() < 0) { printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n"); restore_flags(flags); return; } if (tty_unregister_driver(&dev->mdm.tty_modem)) { printk(KERN_WARNING "isdn: ttyI-device busy, remove cancelled\n"); restore_flags(flags); return; } if (tty_unregister_driver(&dev->mdm.cua_modem)) { printk(KERN_WARNING "isdn: cui-device busy, remove cancelled\n"); restore_flags(flags); return; } for (i = 0; i < ISDN_MAX_CHANNELS; i++) { isdn_tty_cleanup_xmit(&dev->mdm.info[i]); kfree(dev->mdm.info[i].xmit_buf - 4); } if (unregister_chrdev(ISDN_MAJOR, "isdn") != 0) { printk(KERN_WARNING "isdn: controldevice busy, remove cancelled\n"); } else { del_timer(&dev->timer); kfree(dev); printk(KERN_NOTICE "ISDN-subsystem unloaded\n"); } restore_flags(flags); } #endif