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 */
 142typedef 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 */
 157typedef 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 */
 247typedef 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 */
 279typedef 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 */
 289typedef 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>) */
 311typedef 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                   rcvsched;        /* Receive needs schedule         */
 323  int                   isdn_driver;     /* Index to isdn-driver           */
 324  int                   isdn_channel;    /* Index to isdn-channel          */
 325  int                   drv_index;       /* Index to dev->usage            */
 326  int                   ncarrier;        /* Flag: schedule NO CARRIER      */
 327  unsigned char         last_cause[8];   /* Last cause message             */
 328  unsigned char         last_num[ISDN_MSNLEN];
 329                                         /* Last phone-number              */
 330  unsigned char         last_l2;         /* Last layer-2 protocol          */
 331  unsigned char         last_si;         /* Last service                   */
 332  unsigned char         last_lhup;       /* Last hangup local?             */
 333  unsigned char         last_dir;        /* Last direction (in or out)     */
 334  struct timer_list     nc_timer;        /* Timer for delayed NO CARRIER   */
 335  int                   send_outstanding;/* # of outstanding send-requests */
 336  int                   xmit_size;       /* max. # of chars in xmit_buf    */
 337  int                   xmit_count;      /* # of chars in xmit_buf         */
 338  struct sk_buff_head   xmit_queue;      /* transmit queue                 */
 339  atomic_t              xmit_lock;       /* Semaphore for isdn_tty_write   */
 340#ifdef CONFIG_ISDN_AUDIO
 341  int                   vonline;         /* Voice-channel status           */
 342                                         /* Bit 0 = recording              */
 343                                         /* Bit 1 = playback               */
 344                                         /* Bit 2 = playback, DLE-ETX seen */
 345  struct sk_buff_head   dtmf_queue;      /* queue for dtmf results         */
 346  void                  *adpcms;         /* state for adpcm decompression  */
 347  void                  *adpcmr;         /* state for adpcm compression    */
 348  void                  *dtmf_state;     /* state for dtmf decoder         */
 349  void                  *silence_state;  /* state for silence detection    */
 350#endif
 351#ifdef CONFIG_ISDN_TTY_FAX
 352  struct T30_s          *fax;            /* T30 Fax Group 3 data/interface */
 353  int                   faxonline;       /* Fax-channel status             */
 354#endif
 355  atemu                 emu;             /* AT-emulator data               */
 356  spinlock_t            readlock;
 357} modem_info;
 358
 359#define ISDN_MODEM_WINSIZE 8
 360
 361/* Description of one ISDN-tty */
 362typedef struct _isdn_modem {
 363  int                refcount;                          /* Number of opens        */
 364  struct tty_driver  *tty_modem;                        /* tty-device             */
 365  struct tty_struct  *modem_table[ISDN_MAX_CHANNELS];   /* ?? copied from Orig    */
 366  struct ktermios     *modem_termios[ISDN_MAX_CHANNELS];
 367  struct ktermios     *modem_termios_locked[ISDN_MAX_CHANNELS];
 368  modem_info         info[ISDN_MAX_CHANNELS];      /* Private data           */
 369} isdn_modem_t;
 370
 371/*======================= End of ISDN-tty stuff ============================*/
 372
 373/*======================== Start of V.110 stuff ============================*/
 374#define V110_BUFSIZE 1024
 375
 376typedef struct {
 377        int nbytes;                    /* 1 Matrixbyte -> nbytes in stream     */
 378        int nbits;                     /* Number of used bits in streambyte    */
 379        unsigned char key;             /* Bitmask in stream eg. 11 (nbits=2)   */
 380        int decodelen;                 /* Amount of data in decodebuf          */
 381        int SyncInit;                  /* Number of sync frames to send        */
 382        unsigned char *OnlineFrame;    /* Precalculated V110 idle frame        */
 383        unsigned char *OfflineFrame;   /* Precalculated V110 sync Frame        */
 384        int framelen;                  /* Length of frames                     */
 385        int skbuser;                   /* Number of unacked userdata skbs      */
 386        int skbidle;                   /* Number of unacked idle/sync skbs     */
 387        int introducer;                /* Local vars for decoder               */
 388        int dbit;
 389        unsigned char b;
 390        int skbres;                    /* space to reserve in outgoing skb     */
 391        int maxsize;                   /* maxbufsize of lowlevel driver        */
 392        unsigned char *encodebuf;      /* temporary buffer for encoding        */
 393        unsigned char decodebuf[V110_BUFSIZE]; /* incomplete V110 matrices     */
 394} isdn_v110_stream;
 395
 396/*========================= End of V.110 stuff =============================*/
 397
 398/*======================= Start of general stuff ===========================*/
 399
 400typedef struct {
 401        char *next;
 402        char *private;
 403} infostruct;
 404
 405#define DRV_FLAG_RUNNING 1
 406#define DRV_FLAG_REJBUS  2
 407#define DRV_FLAG_LOADED  4
 408
 409/* Description of hardware-level-driver */
 410typedef struct _isdn_driver {
 411        ulong               online;           /* Channel-Online flags             */
 412        ulong               flags;            /* Misc driver Flags                */
 413        int                 locks;            /* Number of locks for this driver  */
 414        int                 channels;         /* Number of channels               */
 415        wait_queue_head_t   st_waitq;         /* Wait-Queue for status-read's     */
 416        int                 maxbufsize;       /* Maximum Buffersize supported     */
 417        unsigned long       pktcount;         /* Until now: unused                */
 418        int                 stavail;          /* Chars avail on Status-device     */
 419        isdn_if            *interface;        /* Interface to driver              */
 420        int                *rcverr;           /* Error-counters for B-Ch.-receive */
 421        int                *rcvcount;         /* Byte-counters for B-Ch.-receive  */
 422#ifdef CONFIG_ISDN_AUDIO
 423        unsigned long      DLEflag;           /* Flags: Insert DLE at next read   */
 424#endif
 425        struct sk_buff_head *rpqueue;         /* Pointers to start of Rcv-Queue   */
 426        wait_queue_head_t  *rcv_waitq;       /* Wait-Queues for B-Channel-Reads  */
 427        wait_queue_head_t  *snd_waitq;       /* Wait-Queue for B-Channel-Send's  */
 428        char               msn2eaz[10][ISDN_MSNLEN];  /* Mapping-Table MSN->EAZ   */
 429} isdn_driver_t;
 430
 431/* Main driver-data */
 432typedef struct isdn_devt {
 433        struct module     *owner;
 434        spinlock_t        lock;
 435        unsigned short    flags;                      /* Bitmapped Flags:           */
 436        int               drivers;                    /* Current number of drivers  */
 437        int               channels;                   /* Current number of channels */
 438        int               net_verbose;                /* Verbose-Flag               */
 439        int               modempoll;                  /* Flag: tty-read active      */
 440        spinlock_t        timerlock;
 441        int               tflags;                     /* Timer-Flags:               */
 442        /*  see ISDN_TIMER_..defines  */
 443        int               global_flags;
 444        infostruct        *infochain;                 /* List of open info-devs.    */
 445        wait_queue_head_t info_waitq;                 /* Wait-Queue for isdninfo    */
 446        struct timer_list timer;                      /* Misc.-function Timer       */
 447        int               chanmap[ISDN_MAX_CHANNELS]; /* Map minor->device-channel  */
 448        int               drvmap[ISDN_MAX_CHANNELS];  /* Map minor->driver-index    */
 449        int               usage[ISDN_MAX_CHANNELS];   /* Used by tty/ip/voice       */
 450        char              num[ISDN_MAX_CHANNELS][ISDN_MSNLEN];
 451        /* Remote number of active ch.*/
 452        int               m_idx[ISDN_MAX_CHANNELS];   /* Index for mdm....          */
 453        isdn_driver_t     *drv[ISDN_MAX_DRIVERS];     /* Array of drivers           */
 454        isdn_net_dev      *netdev;                    /* Linked list of net-if's    */
 455        char              drvid[ISDN_MAX_DRIVERS][20];/* Driver-ID                 */
 456        struct task_struct *profd;                    /* For iprofd                 */
 457        isdn_modem_t      mdm;                        /* tty-driver-data            */
 458        isdn_net_dev      *rx_netdev[ISDN_MAX_CHANNELS]; /* rx netdev-pointers     */
 459        isdn_net_dev      *st_netdev[ISDN_MAX_CHANNELS]; /* stat netdev-pointers   */
 460        ulong             ibytes[ISDN_MAX_CHANNELS];  /* Statistics incoming bytes  */
 461        ulong             obytes[ISDN_MAX_CHANNELS];  /* Statistics outgoing bytes  */
 462        int               v110emu[ISDN_MAX_CHANNELS]; /* V.110 emulator-mode 0=none */
 463        atomic_t          v110use[ISDN_MAX_CHANNELS]; /* Usage-Semaphore for stream */
 464        isdn_v110_stream  *v110[ISDN_MAX_CHANNELS];   /* V.110 private data         */
 465        struct mutex      mtx;                        /* serialize list access*/
 466        unsigned long     global_features;
 467} isdn_dev;
 468
 469extern isdn_dev *dev;
 470
 471
 472#endif /* __ISDN_H__ */
 473
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