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TOMOYO Linux Cross Reference
Linux/include/linux/isdn.h

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  1 /* $Id: isdn.h,v 1.125.2.3 2004/02/10 01:07:14 keil Exp $
  2  *
  3  * Main header for the Linux ISDN subsystem (linklevel).
  4  *
  5  * Copyright 1994,95,96 by Fritz Elfert (fritz@isdn4linux.de)
  6  * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg
  7  * Copyright 1995,96    by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
  8  * 
  9  * This software may be used and distributed according to the terms
 10  * of the GNU General Public License, incorporated herein by reference.
 11  *
 12  */
 13 #ifndef __ISDN_H__
 14 #define __ISDN_H__
 15 
 16 
 17 #include <linux/errno.h>
 18 #include <linux/fs.h>
 19 #include <linux/major.h>
 20 #include <asm/io.h>
 21 #include <linux/kernel.h>
 22 #include <linux/signal.h>
 23 #include <linux/slab.h>
 24 #include <linux/timer.h>
 25 #include <linux/wait.h>
 26 #include <linux/tty.h>
 27 #include <linux/tty_flip.h>
 28 #include <linux/serial_reg.h>
 29 #include <linux/fcntl.h>
 30 #include <linux/types.h>
 31 #include <linux/interrupt.h>
 32 #include <linux/ip.h>
 33 #include <linux/in.h>
 34 #include <linux/netdevice.h>
 35 #include <linux/etherdevice.h>
 36 #include <linux/skbuff.h>
 37 #include <linux/tcp.h>
 38 #include <linux/mutex.h>
 39 #include <uapi/linux/isdn.h>
 40 
 41 #define ISDN_TTY_MAJOR    43
 42 #define ISDN_TTYAUX_MAJOR 44
 43 #define ISDN_MAJOR        45
 44 
 45 /* The minor-devicenumbers for Channel 0 and 1 are used as arguments for
 46  * physical Channel-Mapping, so they MUST NOT be changed without changing
 47  * the correspondent code in isdn.c
 48  */
 49 
 50 #define ISDN_MINOR_B        0
 51 #define ISDN_MINOR_BMAX     (ISDN_MAX_CHANNELS-1)
 52 #define ISDN_MINOR_CTRL     64
 53 #define ISDN_MINOR_CTRLMAX  (64 + (ISDN_MAX_CHANNELS-1))
 54 #define ISDN_MINOR_PPP      128
 55 #define ISDN_MINOR_PPPMAX   (128 + (ISDN_MAX_CHANNELS-1))
 56 #define ISDN_MINOR_STATUS   255
 57 
 58 #ifdef CONFIG_ISDN_PPP
 59 
 60 #ifdef CONFIG_ISDN_PPP_VJ
 61 #  include <net/slhc_vj.h>
 62 #endif
 63 
 64 #include <linux/ppp_defs.h>
 65 #include <linux/ppp-ioctl.h>
 66 
 67 #include <linux/isdn_ppp.h>
 68 #endif
 69 
 70 #ifdef CONFIG_ISDN_X25
 71 #  include <linux/concap.h>
 72 #endif
 73 
 74 #include <linux/isdnif.h>
 75 
 76 #define ISDN_DRVIOCTL_MASK       0x7f  /* Mask for Device-ioctl */
 77 
 78 /* Until now unused */
 79 #define ISDN_SERVICE_VOICE 1
 80 #define ISDN_SERVICE_AB    1<<1 
 81 #define ISDN_SERVICE_X21   1<<2
 82 #define ISDN_SERVICE_G4    1<<3
 83 #define ISDN_SERVICE_BTX   1<<4
 84 #define ISDN_SERVICE_DFUE  1<<5
 85 #define ISDN_SERVICE_X25   1<<6
 86 #define ISDN_SERVICE_TTX   1<<7
 87 #define ISDN_SERVICE_MIXED 1<<8
 88 #define ISDN_SERVICE_FW    1<<9
 89 #define ISDN_SERVICE_GTEL  1<<10
 90 #define ISDN_SERVICE_BTXN  1<<11
 91 #define ISDN_SERVICE_BTEL  1<<12
 92 
 93 /* Macros checking plain usage */
 94 #define USG_NONE(x)         ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NONE)
 95 #define USG_RAW(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_RAW)
 96 #define USG_MODEM(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM)
 97 #define USG_VOICE(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)
 98 #define USG_NET(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NET)
 99 #define USG_FAX(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_FAX)
100 #define USG_OUTGOING(x)     ((x & ISDN_USAGE_OUTGOING)==ISDN_USAGE_OUTGOING)
101 #define USG_MODEMORVOICE(x) (((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM) || \
102                              ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)     )
103 
104 /* Timer-delays and scheduling-flags */
105 #define ISDN_TIMER_RES         4                         /* Main Timer-Resolution   */
106 #define ISDN_TIMER_02SEC       (HZ/ISDN_TIMER_RES/5)     /* Slow-Timer1 .2 sec      */
107 #define ISDN_TIMER_1SEC        (HZ/ISDN_TIMER_RES)       /* Slow-Timer2 1 sec       */
108 #define ISDN_TIMER_RINGING     5 /* tty RINGs = ISDN_TIMER_1SEC * this factor       */
109 #define ISDN_TIMER_KEEPINT    10 /* Cisco-Keepalive = ISDN_TIMER_1SEC * this factor */
110 #define ISDN_TIMER_MODEMREAD   1
111 #define ISDN_TIMER_MODEMPLUS   2
112 #define ISDN_TIMER_MODEMRING   4
113 #define ISDN_TIMER_MODEMXMIT   8
114 #define ISDN_TIMER_NETDIAL    16 
115 #define ISDN_TIMER_NETHANGUP  32
116 #define ISDN_TIMER_CARRIER   256 /* Wait for Carrier */
117 #define ISDN_TIMER_FAST      (ISDN_TIMER_MODEMREAD | ISDN_TIMER_MODEMPLUS | \
118                               ISDN_TIMER_MODEMXMIT)
119 #define ISDN_TIMER_SLOW      (ISDN_TIMER_MODEMRING | ISDN_TIMER_NETHANGUP | \
120                               ISDN_TIMER_NETDIAL | ISDN_TIMER_CARRIER)
121 
122 /* Timeout-Values for isdn_net_dial() */
123 #define ISDN_TIMER_DTIMEOUT10 (10*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
124 #define ISDN_TIMER_DTIMEOUT15 (15*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
125 #define ISDN_TIMER_DTIMEOUT60 (60*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))
126 
127 /* GLOBAL_FLAGS */
128 #define ISDN_GLOBAL_STOPPED 1
129 
130 /*=================== Start of ip-over-ISDN stuff =========================*/
131 
132 /* Feature- and status-flags for a net-interface */
133 #define ISDN_NET_CONNECTED  0x01       /* Bound to ISDN-Channel             */
134 #define ISDN_NET_SECURE     0x02       /* Accept calls from phonelist only  */
135 #define ISDN_NET_CALLBACK   0x04       /* activate callback                 */
136 #define ISDN_NET_CBHUP      0x08       /* hangup before callback            */
137 #define ISDN_NET_CBOUT      0x10       /* remote machine does callback      */
138 
139 #define ISDN_NET_MAGIC      0x49344C02 /* for paranoia-checking             */
140 
141 /* Phone-list-element */
142 typedef struct {
143   void *next;
144   char num[ISDN_MSNLEN];
145 } isdn_net_phone;
146 
147 /*
148    Principles when extending structures for generic encapsulation protocol
149    ("concap") support:
150    - Stuff which is hardware specific (here i4l-specific) goes in 
151      the netdev -> local structure (here: isdn_net_local)
152    - Stuff which is encapsulation protocol specific goes in the structure
153      which holds the linux device structure (here: isdn_net_device)
154 */
155 
156 /* Local interface-data */
157 typedef struct isdn_net_local_s {
158   ulong                  magic;
159   struct net_device_stats stats;       /* Ethernet Statistics              */
160   int                    isdn_device;  /* Index to isdn-device             */
161   int                    isdn_channel; /* Index to isdn-channel            */
162   int                    ppp_slot;     /* PPPD device slot number          */
163   int                    pre_device;   /* Preselected isdn-device          */
164   int                    pre_channel;  /* Preselected isdn-channel         */
165   int                    exclusive;    /* If non-zero idx to reserved chan.*/
166   int                    flags;        /* Connection-flags                 */
167   int                    dialretry;    /* Counter for Dialout-retries      */
168   int                    dialmax;      /* Max. Number of Dial-retries      */
169   int                    cbdelay;      /* Delay before Callback starts     */
170   int                    dtimer;       /* Timeout-counter for dialing      */
171   char                   msn[ISDN_MSNLEN]; /* MSNs/EAZs for this interface */
172   u_char                 cbhup;        /* Flag: Reject Call before Callback*/
173   u_char                 dialstate;    /* State for dialing                */
174   u_char                 p_encap;      /* Packet encapsulation             */
175                                        /*   0 = Ethernet over ISDN         */
176                                        /*   1 = RAW-IP                     */
177                                        /*   2 = IP with type field         */
178   u_char                 l2_proto;     /* Layer-2-protocol                 */
179                                        /* See ISDN_PROTO_L2..-constants in */
180                                        /* isdnif.h                         */
181                                        /*   0 = X75/LAPB with I-Frames     */
182                                        /*   1 = X75/LAPB with UI-Frames    */
183                                        /*   2 = X75/LAPB with BUI-Frames   */
184                                        /*   3 = HDLC                       */
185   u_char                 l3_proto;     /* Layer-3-protocol                 */
186                                        /* See ISDN_PROTO_L3..-constants in */
187                                        /* isdnif.h                         */
188                                        /*   0 = Transparent                */
189   int                    huptimer;     /* Timeout-counter for auto-hangup  */
190   int                    charge;       /* Counter for charging units       */
191   ulong                  chargetime;   /* Timer for Charging info          */
192   int                    hupflags;     /* Flags for charge-unit-hangup:    */
193                                        /* bit0: chargeint is invalid       */
194                                        /* bit1: Getting charge-interval    */
195                                        /* bit2: Do charge-unit-hangup      */
196                                        /* bit3: Do hangup even on incoming */
197   int                    outgoing;     /* Flag: outgoing call              */
198   int                    onhtime;      /* Time to keep link up             */
199   int                    chargeint;    /* Interval between charge-infos    */
200   int                    onum;         /* Flag: at least 1 outgoing number */
201   int                    cps;          /* current speed of this interface  */
202   int                    transcount;   /* byte-counter for cps-calculation */
203   int                    sqfull;       /* Flag: netdev-queue overloaded    */
204   ulong                  sqfull_stamp; /* Start-Time of overload           */
205   ulong                  slavedelay;   /* Dynamic bundling delaytime       */
206   int                    triggercps;   /* BogoCPS needed for trigger slave */
207   isdn_net_phone         *phone[2];    /* List of remote-phonenumbers      */
208                                        /* phone[0] = Incoming Numbers      */
209                                        /* phone[1] = Outgoing Numbers      */
210   isdn_net_phone         *dial;        /* Pointer to dialed number         */
211   struct net_device      *master;      /* Ptr to Master device for slaves  */
212   struct net_device      *slave;       /* Ptr to Slave device for masters  */
213   struct isdn_net_local_s *next;       /* Ptr to next link in bundle       */
214   struct isdn_net_local_s *last;       /* Ptr to last link in bundle       */
215   struct isdn_net_dev_s  *netdev;      /* Ptr to netdev                    */
216   struct sk_buff_head    super_tx_queue; /* List of supervisory frames to  */
217                                        /* be transmitted asap              */
218   atomic_t frame_cnt;                  /* number of frames currently       */
219                                        /* queued in HL driver              */    
220                                        /* Ptr to orig. hard_header_cache   */
221   spinlock_t             xmit_lock;    /* used to protect the xmit path of */
222                                        /* a particular channel (including  */
223                                        /* the frame_cnt                    */
224 
225   int  pppbind;                        /* ippp device for bindings         */
226   int                                   dialtimeout;    /* How long shall we try on dialing? (jiffies) */
227   int                                   dialwait;               /* How long shall we wait after failed attempt? (jiffies) */
228   ulong                                 dialstarted;    /* jiffies of first dialing-attempt */
229   ulong                                 dialwait_timer; /* jiffies of earliest next dialing-attempt */
230   int                                   huptimeout;             /* How long will the connection be up? (seconds) */
231 #ifdef CONFIG_ISDN_X25
232   struct concap_device_ops *dops;      /* callbacks used by encapsulator   */
233 #endif
234   /* use an own struct for that in later versions */
235   ulong cisco_myseq;                   /* Local keepalive seq. for Cisco   */
236   ulong cisco_mineseen;                /* returned keepalive seq. from remote */
237   ulong cisco_yourseq;                 /* Remote keepalive seq. for Cisco  */
238   int cisco_keepalive_period;           /* keepalive period */
239   ulong cisco_last_slarp_in;            /* jiffie of last keepalive packet we received */
240   char cisco_line_state;                /* state of line according to keepalive packets */
241   char cisco_debserint;                 /* debugging flag of cisco hdlc with slarp */
242   struct timer_list cisco_timer;
243   struct work_struct tqueue;
244 } isdn_net_local;
245 
246 /* the interface itself */
247 typedef struct isdn_net_dev_s {
248   isdn_net_local *local;
249   isdn_net_local *queue;               /* circular list of all bundled
250                                           channels, which are currently
251                                           online                           */
252   spinlock_t queue_lock;               /* lock to protect queue            */
253   void *next;                          /* Pointer to next isdn-interface   */
254   struct net_device *dev;              /* interface to upper levels        */
255 #ifdef CONFIG_ISDN_PPP
256   ippp_bundle * pb;             /* pointer to the common bundle structure
257                                  * with the per-bundle data */
258 #endif
259 #ifdef CONFIG_ISDN_X25
260   struct concap_proto  *cprot; /* connection oriented encapsulation protocol */
261 #endif
262 
263 } isdn_net_dev;
264 
265 /*===================== End of ip-over-ISDN stuff ===========================*/
266 
267 /*======================= Start of ISDN-tty stuff ===========================*/
268 
269 #define ISDN_ASYNC_MAGIC          0x49344C01 /* for paranoia-checking        */
270 #define ISDN_SERIAL_XMIT_SIZE           1024 /* Default bufsize for write    */
271 #define ISDN_SERIAL_XMIT_MAX            4000 /* Maximum bufsize for write    */
272 
273 #ifdef CONFIG_ISDN_AUDIO
274 /* For using sk_buffs with audio we need some private variables
275  * within each sk_buff. For this purpose, we declare a struct here,
276  * and put it always at the private skb->cb data array. A few macros help
277  * accessing the variables.
278  */
279 typedef struct _isdn_audio_data {
280   unsigned short dle_count;
281   unsigned char  lock;
282 } isdn_audio_data_t;
283 
284 #define ISDN_AUDIO_SKB_DLECOUNT(skb)    (((isdn_audio_data_t *)&skb->cb[0])->dle_count)
285 #define ISDN_AUDIO_SKB_LOCK(skb)        (((isdn_audio_data_t *)&skb->cb[0])->lock)
286 #endif
287 
288 /* Private data of AT-command-interpreter */
289 typedef struct atemu {
290         u_char       profile[ISDN_MODEM_NUMREG]; /* Modem-Regs. Profile 0              */
291         u_char       mdmreg[ISDN_MODEM_NUMREG];  /* Modem-Registers                    */
292         char         pmsn[ISDN_MSNLEN];          /* EAZ/MSNs Profile 0                 */
293         char         msn[ISDN_MSNLEN];           /* EAZ/MSN                            */
294         char         plmsn[ISDN_LMSNLEN];        /* Listening MSNs Profile 0           */
295         char         lmsn[ISDN_LMSNLEN];         /* Listening MSNs                     */
296         char         cpn[ISDN_MSNLEN];           /* CalledPartyNumber on incoming call */
297         char         connmsg[ISDN_CMSGLEN];      /* CONNECT-Msg from HL-Driver         */
298 #ifdef CONFIG_ISDN_AUDIO
299         u_char       vpar[10];                   /* Voice-parameters                   */
300         int          lastDLE;                    /* Flag for voice-coding: DLE seen    */
301 #endif
302         int          mdmcmdl;                    /* Length of Modem-Commandbuffer      */
303         int          pluscount;                  /* Counter for +++ sequence           */
304         u_long       lastplus;                   /* Timestamp of last +                */
305         int          carrierwait;                /* Seconds of carrier waiting         */
306         char         mdmcmd[255];                /* Modem-Commandbuffer                */
307         unsigned int charge;                     /* Charge units of current connection */
308 } atemu;
309 
310 /* Private data (similar to async_struct in <linux/serial.h>) */
311 typedef struct modem_info {
312   int                   magic;
313   struct tty_port       port;
314   int                   x_char;          /* xon/xoff character             */
315   int                   mcr;             /* Modem control register         */
316   int                   msr;             /* Modem status register          */
317   int                   lsr;             /* Line status register           */
318   int                   line;
319   int                   online;          /* 1 = B-Channel is up, drop data */
320                                          /* 2 = B-Channel is up, deliver d.*/
321   int                   dialing;         /* Dial in progress or ATA        */
322   int                   closing;
323   int                   rcvsched;        /* Receive needs schedule         */
324   int                   isdn_driver;     /* Index to isdn-driver           */
325   int                   isdn_channel;    /* Index to isdn-channel          */
326   int                   drv_index;       /* Index to dev->usage            */
327   int                   ncarrier;        /* Flag: schedule NO CARRIER      */
328   unsigned char         last_cause[8];   /* Last cause message             */
329   unsigned char         last_num[ISDN_MSNLEN];
330                                          /* Last phone-number              */
331   unsigned char         last_l2;         /* Last layer-2 protocol          */
332   unsigned char         last_si;         /* Last service                   */
333   unsigned char         last_lhup;       /* Last hangup local?             */
334   unsigned char         last_dir;        /* Last direction (in or out)     */
335   struct timer_list     nc_timer;        /* Timer for delayed NO CARRIER   */
336   int                   send_outstanding;/* # of outstanding send-requests */
337   int                   xmit_size;       /* max. # of chars in xmit_buf    */
338   int                   xmit_count;      /* # of chars in xmit_buf         */
339   struct sk_buff_head   xmit_queue;      /* transmit queue                 */
340   atomic_t              xmit_lock;       /* Semaphore for isdn_tty_write   */
341 #ifdef CONFIG_ISDN_AUDIO
342   int                   vonline;         /* Voice-channel status           */
343                                          /* Bit 0 = recording              */
344                                          /* Bit 1 = playback               */
345                                          /* Bit 2 = playback, DLE-ETX seen */
346   struct sk_buff_head   dtmf_queue;      /* queue for dtmf results         */
347   void                  *adpcms;         /* state for adpcm decompression  */
348   void                  *adpcmr;         /* state for adpcm compression    */
349   void                  *dtmf_state;     /* state for dtmf decoder         */
350   void                  *silence_state;  /* state for silence detection    */
351 #endif
352 #ifdef CONFIG_ISDN_TTY_FAX
353   struct T30_s          *fax;            /* T30 Fax Group 3 data/interface */
354   int                   faxonline;       /* Fax-channel status             */
355 #endif
356   atemu                 emu;             /* AT-emulator data               */
357   spinlock_t            readlock;
358 } modem_info;
359 
360 #define ISDN_MODEM_WINSIZE 8
361 
362 /* Description of one ISDN-tty */
363 typedef struct _isdn_modem {
364   int                refcount;                          /* Number of opens        */
365   struct tty_driver  *tty_modem;                        /* tty-device             */
366   struct tty_struct  *modem_table[ISDN_MAX_CHANNELS];   /* ?? copied from Orig    */
367   struct ktermios     *modem_termios[ISDN_MAX_CHANNELS];
368   struct ktermios     *modem_termios_locked[ISDN_MAX_CHANNELS];
369   modem_info         info[ISDN_MAX_CHANNELS];      /* Private data           */
370 } isdn_modem_t;
371 
372 /*======================= End of ISDN-tty stuff ============================*/
373 
374 /*======================== Start of V.110 stuff ============================*/
375 #define V110_BUFSIZE 1024
376 
377 typedef struct {
378         int nbytes;                    /* 1 Matrixbyte -> nbytes in stream     */
379         int nbits;                     /* Number of used bits in streambyte    */
380         unsigned char key;             /* Bitmask in stream eg. 11 (nbits=2)   */
381         int decodelen;                 /* Amount of data in decodebuf          */
382         int SyncInit;                  /* Number of sync frames to send        */
383         unsigned char *OnlineFrame;    /* Precalculated V110 idle frame        */
384         unsigned char *OfflineFrame;   /* Precalculated V110 sync Frame        */
385         int framelen;                  /* Length of frames                     */
386         int skbuser;                   /* Number of unacked userdata skbs      */
387         int skbidle;                   /* Number of unacked idle/sync skbs     */
388         int introducer;                /* Local vars for decoder               */
389         int dbit;
390         unsigned char b;
391         int skbres;                    /* space to reserve in outgoing skb     */
392         int maxsize;                   /* maxbufsize of lowlevel driver        */
393         unsigned char *encodebuf;      /* temporary buffer for encoding        */
394         unsigned char decodebuf[V110_BUFSIZE]; /* incomplete V110 matrices     */
395 } isdn_v110_stream;
396 
397 /*========================= End of V.110 stuff =============================*/
398 
399 /*======================= Start of general stuff ===========================*/
400 
401 typedef struct {
402         char *next;
403         char *private;
404 } infostruct;
405 
406 #define DRV_FLAG_RUNNING 1
407 #define DRV_FLAG_REJBUS  2
408 #define DRV_FLAG_LOADED  4
409 
410 /* Description of hardware-level-driver */
411 typedef struct _isdn_driver {
412         ulong               online;           /* Channel-Online flags             */
413         ulong               flags;            /* Misc driver Flags                */
414         int                 locks;            /* Number of locks for this driver  */
415         int                 channels;         /* Number of channels               */
416         wait_queue_head_t   st_waitq;         /* Wait-Queue for status-read's     */
417         int                 maxbufsize;       /* Maximum Buffersize supported     */
418         unsigned long       pktcount;         /* Until now: unused                */
419         int                 stavail;          /* Chars avail on Status-device     */
420         isdn_if            *interface;        /* Interface to driver              */
421         int                *rcverr;           /* Error-counters for B-Ch.-receive */
422         int                *rcvcount;         /* Byte-counters for B-Ch.-receive  */
423 #ifdef CONFIG_ISDN_AUDIO
424         unsigned long      DLEflag;           /* Flags: Insert DLE at next read   */
425 #endif
426         struct sk_buff_head *rpqueue;         /* Pointers to start of Rcv-Queue   */
427         wait_queue_head_t  *rcv_waitq;       /* Wait-Queues for B-Channel-Reads  */
428         wait_queue_head_t  *snd_waitq;       /* Wait-Queue for B-Channel-Send's  */
429         char               msn2eaz[10][ISDN_MSNLEN];  /* Mapping-Table MSN->EAZ   */
430 } isdn_driver_t;
431 
432 /* Main driver-data */
433 typedef struct isdn_devt {
434         struct module     *owner;
435         spinlock_t        lock;
436         unsigned short    flags;                      /* Bitmapped Flags:           */
437         int               drivers;                    /* Current number of drivers  */
438         int               channels;                   /* Current number of channels */
439         int               net_verbose;                /* Verbose-Flag               */
440         int               modempoll;                  /* Flag: tty-read active      */
441         spinlock_t        timerlock;
442         int               tflags;                     /* Timer-Flags:               */
443         /*  see ISDN_TIMER_..defines  */
444         int               global_flags;
445         infostruct        *infochain;                 /* List of open info-devs.    */
446         wait_queue_head_t info_waitq;                 /* Wait-Queue for isdninfo    */
447         struct timer_list timer;                      /* Misc.-function Timer       */
448         int               chanmap[ISDN_MAX_CHANNELS]; /* Map minor->device-channel  */
449         int               drvmap[ISDN_MAX_CHANNELS];  /* Map minor->driver-index    */
450         int               usage[ISDN_MAX_CHANNELS];   /* Used by tty/ip/voice       */
451         char              num[ISDN_MAX_CHANNELS][ISDN_MSNLEN];
452         /* Remote number of active ch.*/
453         int               m_idx[ISDN_MAX_CHANNELS];   /* Index for mdm....          */
454         isdn_driver_t     *drv[ISDN_MAX_DRIVERS];     /* Array of drivers           */
455         isdn_net_dev      *netdev;                    /* Linked list of net-if's    */
456         char              drvid[ISDN_MAX_DRIVERS][20];/* Driver-ID                 */
457         struct task_struct *profd;                    /* For iprofd                 */
458         isdn_modem_t      mdm;                        /* tty-driver-data            */
459         isdn_net_dev      *rx_netdev[ISDN_MAX_CHANNELS]; /* rx netdev-pointers     */
460         isdn_net_dev      *st_netdev[ISDN_MAX_CHANNELS]; /* stat netdev-pointers   */
461         ulong             ibytes[ISDN_MAX_CHANNELS];  /* Statistics incoming bytes  */
462         ulong             obytes[ISDN_MAX_CHANNELS];  /* Statistics outgoing bytes  */
463         int               v110emu[ISDN_MAX_CHANNELS]; /* V.110 emulator-mode 0=none */
464         atomic_t          v110use[ISDN_MAX_CHANNELS]; /* Usage-Semaphore for stream */
465         isdn_v110_stream  *v110[ISDN_MAX_CHANNELS];   /* V.110 private data         */
466         struct mutex      mtx;                        /* serialize list access*/
467         unsigned long     global_features;
468 } isdn_dev;
469 
470 extern isdn_dev *dev;
471 
472 
473 #endif /* __ISDN_H__ */
474 

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