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/* $Id: isdn.h,v 1.1.1.1 2004-04-15 02:36:27 phoenix Exp $

 *

 * Main header for the Linux ISDN subsystem (linklevel).

 *

 * Copyright 1994,95,96 by Fritz Elfert (fritz@isdn4linux.de)

 * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg

 * Copyright 1995,96    by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)

 *

 * This software may be used and distributed according to the terms

 * of the GNU General Public License, incorporated herein by reference.

 *

 */

#ifndef __ISDN_H__

#define __ISDN_H__

#include <linux/ioctl.h>

#ifdef CONFIG_COBALT_MICRO_SERVER

/* Save memory */

#define ISDN_MAX_DRIVERS    2

#define ISDN_MAX_CHANNELS   8

#else

#define ISDN_MAX_DRIVERS    32

#define ISDN_MAX_CHANNELS   64

#endif

/* New ioctl-codes */

#define IIOCNETAIF  _IO('I',1)

#define IIOCNETDIF  _IO('I',2)

#define IIOCNETSCF  _IO('I',3)

#define IIOCNETGCF  _IO('I',4)

#define IIOCNETANM  _IO('I',5)

#define IIOCNETDNM  _IO('I',6)

#define IIOCNETGNM  _IO('I',7)

#define IIOCGETSET  _IO('I',8) /* no longer supported */

#define IIOCSETSET  _IO('I',9) /* no longer supported */

#define IIOCSETVER  _IO('I',10)

#define IIOCNETHUP  _IO('I',11)

#define IIOCSETGST  _IO('I',12)

#define IIOCSETBRJ  _IO('I',13)

#define IIOCSIGPRF  _IO('I',14)

#define IIOCGETPRF  _IO('I',15)

#define IIOCSETPRF  _IO('I',16)

#define IIOCGETMAP  _IO('I',17)

#define IIOCSETMAP  _IO('I',18)

#define IIOCNETASL  _IO('I',19)

#define IIOCNETDIL  _IO('I',20)

#define IIOCGETCPS  _IO('I',21)

#define IIOCGETDVR  _IO('I',22)

#define IIOCNETLCR  _IO('I',23) /* dwabc ioctl for LCR from isdnlog */

#define IIOCNETDWRSET  _IO('I',24) /* dwabc ioctl to reset abc-values to default on a net-interface */

#define IIOCNETALN  _IO('I',32)

#define IIOCNETDLN  _IO('I',33)

#define IIOCNETGPN  _IO('I',34)

#define IIOCDBGVAR  _IO('I',127)

#define IIOCDRVCTL  _IO('I',128)

/* cisco hdlck device private ioctls */

#define SIOCGKEEPPERIOD (SIOCDEVPRIVATE + 0)

#define SIOCSKEEPPERIOD (SIOCDEVPRIVATE + 1)

#define SIOCGDEBSERINT  (SIOCDEVPRIVATE + 2)

#define SIOCSDEBSERINT  (SIOCDEVPRIVATE + 3)

/* Packet encapsulations for net-interfaces */

#define ISDN_NET_ENCAP_ETHER      0

#define ISDN_NET_ENCAP_RAWIP      1

#define ISDN_NET_ENCAP_IPTYP      2

#define ISDN_NET_ENCAP_CISCOHDLC  3 /* Without SLARP and keepalive */

#define ISDN_NET_ENCAP_SYNCPPP    4

#define ISDN_NET_ENCAP_UIHDLC     5

#define ISDN_NET_ENCAP_CISCOHDLCK 6 /* With SLARP and keepalive    */

#define ISDN_NET_ENCAP_X25IFACE   7 /* Documentation/networking/x25-iface.txt*/

#define ISDN_NET_ENCAP_MAX_ENCAP  ISDN_NET_ENCAP_X25IFACE

/* Facility which currently uses an ISDN-channel */

#define ISDN_USAGE_NONE       0

#define ISDN_USAGE_RAW        1

#define ISDN_USAGE_MODEM      2

#define ISDN_USAGE_NET        3

#define ISDN_USAGE_VOICE      4

#define ISDN_USAGE_FAX        5

#define ISDN_USAGE_MASK       7 /* Mask to get plain usage */

#define ISDN_USAGE_DISABLED  32 /* This bit is set, if channel is disabled */

#define ISDN_USAGE_EXCLUSIVE 64 /* This bit is set, if channel is exclusive */

#define ISDN_USAGE_OUTGOING 128 /* This bit is set, if channel is outgoing  */

#define ISDN_MODEM_NUMREG    24        /* Number of Modem-Registers        */

#define ISDN_LMSNLEN         255 /* Length of tty's Listen-MSN string */

#define ISDN_CMSGLEN         50  /* Length of CONNECT-Message to add for Modem */

#define ISDN_MSNLEN          32

#define NET_DV 0x06  /* Data version for isdn_net_ioctl_cfg   */

#define TTY_DV 0x06  /* Data version for iprofd etc.          */

#define INF_DV 0x01  /* Data version for /dev/isdninfo        */

typedef struct {

  char drvid[25];

  unsigned long arg;

} isdn_ioctl_struct;

typedef struct {

  char name[10];

  char phone[ISDN_MSNLEN];

  int  outgoing;

} isdn_net_ioctl_phone;

typedef struct {

  char name[10];     /* Name of interface                     */

  char master[10];   /* Name of Master for Bundling           */

  char slave[10];    /* Name of Slave for Bundling            */

  char eaz[256];     /* EAZ/MSN                               */

  char drvid[25];    /* DriverId for Bindings                 */

  int  onhtime;      /* Hangup-Timeout                        */

  int  charge;       /* Charge-Units                          */

  int  l2_proto;     /* Layer-2 protocol                      */

  int  l3_proto;     /* Layer-3 protocol                      */

  int  p_encap;      /* Encapsulation                         */

  int  exclusive;    /* Channel, if bound exclusive           */

  int  dialmax;      /* Dial Retry-Counter                    */

  int  slavedelay;   /* Delay until slave starts up           */

  int  cbdelay;      /* Delay before Callback                 */

  int  chargehup;    /* Flag: Charge-Hangup                   */

  int  ihup;         /* Flag: Hangup-Timeout on incoming line */

  int  secure;       /* Flag: Secure                          */

  int  callback;     /* Flag: Callback                        */

  int  cbhup;        /* Flag: Reject Call before Callback     */

  int  pppbind;      /* ippp device for bindings              */

  int  chargeint;    /* Use fixed charge interval length      */

  int  triggercps;   /* BogoCPS needed for triggering slave   */

  int  dialtimeout;  /* Dial-Timeout                          */

  int  dialwait;     /* Time to wait after failed dial        */

  int  dialmode;     /* Flag: off / on / auto                 */

} isdn_net_ioctl_cfg;

#define ISDN_NET_DIALMODE_MASK  0xC0    /* bits for status                */

#define ISDN_NET_DM_OFF         0x00    /* this interface is stopped      */

#define ISDN_NET_DM_MANUAL      0x40    /* this interface is on (manual)  */

#define ISDN_NET_DM_AUTO        0x80    /* this interface is autodial     */

#define ISDN_NET_DIALMODE(x) ((&(x))->flags & ISDN_NET_DIALMODE_MASK)

#ifdef __KERNEL__

#include <linux/config.h>

#include <linux/errno.h>

#include <linux/fs.h>

#include <linux/major.h>

#include <asm/segment.h>

#include <asm/io.h>

#include <linux/kernel.h>

#include <linux/signal.h>

#include <linux/slab.h>

#include <linux/timer.h>

#include <linux/wait.h>

#include <linux/tty.h>

#include <linux/tty_flip.h>

#include <linux/serial_reg.h>

#include <linux/fcntl.h>

#include <linux/types.h>

#include <linux/interrupt.h>

#include <linux/ip.h>

#include <linux/in.h>

#include <linux/netdevice.h>

#include <linux/etherdevice.h>

#include <linux/skbuff.h>

#include <linux/tcp.h>

#define ISDN_TTY_MAJOR    43

#define ISDN_TTYAUX_MAJOR 44

#define ISDN_MAJOR        45

/* The minor-devicenumbers for Channel 0 and 1 are used as arguments for

 * physical Channel-Mapping, so they MUST NOT be changed without changing

 * the correspondent code in isdn.c

 */

#define ISDN_MINOR_B        0

#define ISDN_MINOR_BMAX     (ISDN_MAX_CHANNELS-1)

#define ISDN_MINOR_CTRL     64

#define ISDN_MINOR_CTRLMAX  (64 + (ISDN_MAX_CHANNELS-1))

#define ISDN_MINOR_PPP      128

#define ISDN_MINOR_PPPMAX   (128 + (ISDN_MAX_CHANNELS-1))

#define ISDN_MINOR_STATUS   255

#ifdef CONFIG_ISDN_PPP

#ifdef CONFIG_ISDN_PPP_VJ

#  include <net/slhc_vj.h>

#endif

#include <linux/ppp_defs.h>

#include <linux/if_ppp.h>

#include <linux/if_pppvar.h>

#include <linux/isdn_ppp.h>

#endif

#ifdef CONFIG_ISDN_X25

#  include <linux/concap.h>

#endif

#ifdef CONFIG_DEVFS_FS

#  include <linux/devfs_fs_kernel.h>

#endif

#include <linux/isdnif.h>

#define ISDN_DRVIOCTL_MASK       0x7f  /* Mask for Device-ioctl */

/* Until now unused */

#define ISDN_SERVICE_VOICE 1

#define ISDN_SERVICE_AB    1<<1 

#define ISDN_SERVICE_X21   1<<2

#define ISDN_SERVICE_G4    1<<3

#define ISDN_SERVICE_BTX   1<<4

#define ISDN_SERVICE_DFUE  1<<5

#define ISDN_SERVICE_X25   1<<6

#define ISDN_SERVICE_TTX   1<<7

#define ISDN_SERVICE_MIXED 1<<8

#define ISDN_SERVICE_FW    1<<9

#define ISDN_SERVICE_GTEL  1<<10

#define ISDN_SERVICE_BTXN  1<<11

#define ISDN_SERVICE_BTEL  1<<12

/* Macros checking plain usage */

#define USG_NONE(x)         ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NONE)

#define USG_RAW(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_RAW)

#define USG_MODEM(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM)

#define USG_VOICE(x)        ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)

#define USG_NET(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_NET)

#define USG_FAX(x)          ((x & ISDN_USAGE_MASK)==ISDN_USAGE_FAX)

#define USG_OUTGOING(x)     ((x & ISDN_USAGE_OUTGOING)==ISDN_USAGE_OUTGOING)

#define USG_MODEMORVOICE(x) (((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM) || \

                             ((x & ISDN_USAGE_MASK)==ISDN_USAGE_VOICE)     )

/* Timer-delays and scheduling-flags */

#define ISDN_TIMER_RES         4                         /* Main Timer-Resolution   */

#define ISDN_TIMER_02SEC       (HZ/ISDN_TIMER_RES/5)     /* Slow-Timer1 .2 sec      */

#define ISDN_TIMER_1SEC        (HZ/ISDN_TIMER_RES)       /* Slow-Timer2 1 sec       */

#define ISDN_TIMER_RINGING     5 /* tty RINGs = ISDN_TIMER_1SEC * this factor       */

#define ISDN_TIMER_KEEPINT    10 /* Cisco-Keepalive = ISDN_TIMER_1SEC * this factor */

#define ISDN_TIMER_MODEMREAD   1

#define ISDN_TIMER_MODEMPLUS   2

#define ISDN_TIMER_MODEMRING   4

#define ISDN_TIMER_MODEMXMIT   8

#define ISDN_TIMER_NETDIAL    16 

#define ISDN_TIMER_NETHANGUP  32

#define ISDN_TIMER_CARRIER   256 /* Wait for Carrier */

#define ISDN_TIMER_FAST      (ISDN_TIMER_MODEMREAD | ISDN_TIMER_MODEMPLUS | \

                              ISDN_TIMER_MODEMXMIT)

#define ISDN_TIMER_SLOW      (ISDN_TIMER_MODEMRING | ISDN_TIMER_NETHANGUP | \

                              ISDN_TIMER_NETDIAL | ISDN_TIMER_CARRIER)

/* Timeout-Values for isdn_net_dial() */

#define ISDN_TIMER_DTIMEOUT10 (10*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))

#define ISDN_TIMER_DTIMEOUT15 (15*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))

#define ISDN_TIMER_DTIMEOUT60 (60*HZ/(ISDN_TIMER_02SEC*(ISDN_TIMER_RES+1)))

/* GLOBAL_FLAGS */

#define ISDN_GLOBAL_STOPPED 1

/*=================== Start of ip-over-ISDN stuff =========================*/

/* Feature- and status-flags for a net-interface */

#define ISDN_NET_CONNECTED  0x01       /* Bound to ISDN-Channel             */

#define ISDN_NET_SECURE     0x02       /* Accept calls from phonelist only  */

#define ISDN_NET_CALLBACK   0x04       /* activate callback                 */

#define ISDN_NET_CBHUP      0x08       /* hangup before callback            */

#define ISDN_NET_CBOUT      0x10       /* remote machine does callback      */

#define ISDN_NET_MAGIC      0x49344C02 /* for paranoia-checking             */

/* Phone-list-element */

typedef struct {

  void *next;

  char num[ISDN_MSNLEN];

} isdn_net_phone;

/*

   Principles when extending structures for generic encapsulation protocol

   ("concap") support:

   - Stuff which is hardware specific (here i4l-specific) goes in

     the netdev -> local structure (here: isdn_net_local)

   - Stuff which is encapsulation protocol specific goes in the structure

     which holds the linux device structure (here: isdn_net_device)

*/

/* Local interface-data */

typedef struct isdn_net_local_s {

  ulong                  magic;

  char                   name[10];     /* Name of device                   */

  struct net_device_stats stats;       /* Ethernet Statistics              */

  int                    isdn_device;  /* Index to isdn-device             */

  int                    isdn_channel; /* Index to isdn-channel            */

  int                    ppp_slot;     /* PPPD device slot number          */

  int                    pre_device;   /* Preselected isdn-device          */

  int                    pre_channel;  /* Preselected isdn-channel         */

  int                    exclusive;    /* If non-zero idx to reserved chan.*/

  int                    flags;        /* Connection-flags                 */

  int                    dialretry;    /* Counter for Dialout-retries      */

  int                    dialmax;      /* Max. Number of Dial-retries      */

  int                    cbdelay;      /* Delay before Callback starts     */

  int                    dtimer;       /* Timeout-counter for dialing      */

  char                   msn[ISDN_MSNLEN]; /* MSNs/EAZs for this interface */

  u_char                 cbhup;        /* Flag: Reject Call before Callback*/

  u_char                 dialstate;    /* State for dialing                */

  u_char                 p_encap;      /* Packet encapsulation             */

                                       /*   0 = Ethernet over ISDN         */

                                       /*   1 = RAW-IP                     */

                                       /*   2 = IP with type field         */

  u_char                 l2_proto;     /* Layer-2-protocol                 */

                                       /* See ISDN_PROTO_L2..-constants in */

                                       /* isdnif.h                         */

                                       /*   0 = X75/LAPB with I-Frames     */

                                       /*   1 = X75/LAPB with UI-Frames    */

                                       /*   2 = X75/LAPB with BUI-Frames   */

                                       /*   3 = HDLC                       */

  u_char                 l3_proto;     /* Layer-3-protocol                 */

                                       /* See ISDN_PROTO_L3..-constants in */

                                       /* isdnif.h                         */

                                       /*   0 = Transparent                */

  int                    huptimer;     /* Timeout-counter for auto-hangup  */

  int                    charge;       /* Counter for charging units       */

  ulong                  chargetime;   /* Timer for Charging info          */

  int                    hupflags;     /* Flags for charge-unit-hangup:    */

                                       /* bit0: chargeint is invalid       */

                                       /* bit1: Getting charge-interval    */

                                       /* bit2: Do charge-unit-hangup      */

                                       /* bit3: Do hangup even on incoming */

  int                    outgoing;     /* Flag: outgoing call              */

  int                    onhtime;      /* Time to keep link up             */

  int                    chargeint;    /* Interval between charge-infos    */

  int                    onum;         /* Flag: at least 1 outgoing number */

  int                    cps;          /* current speed of this interface  */

  int                    transcount;   /* byte-counter for cps-calculation */

  int                    sqfull;       /* Flag: netdev-queue overloaded    */

  ulong                  sqfull_stamp; /* Start-Time of overload           */

  ulong                  slavedelay;   /* Dynamic bundling delaytime       */

  int                    triggercps;   /* BogoCPS needed for trigger slave */

  isdn_net_phone         *phone[2];    /* List of remote-phonenumbers      */

                                       /* phone[0] = Incoming Numbers      */

                                       /* phone[1] = Outgoing Numbers      */

  isdn_net_phone         *dial;        /* Pointer to dialed number         */

  struct net_device      *master;      /* Ptr to Master device for slaves  */

  struct net_device      *slave;       /* Ptr to Slave device for masters  */

  struct isdn_net_local_s *next;       /* Ptr to next link in bundle       */

  struct isdn_net_local_s *last;       /* Ptr to last link in bundle       */

  struct isdn_net_dev_s  *netdev;      /* Ptr to netdev                    */

  struct sk_buff_head    super_tx_queue; /* List of supervisory frames to  */

                                       /* be transmitted asap              */

  atomic_t frame_cnt;                  /* number of frames currently       */

                                       /* queued in HL driver              */

                                       /* Ptr to orig. hard_header_cache   */

  spinlock_t             xmit_lock;    /* used to protect the xmit path of */

                                       /* a particular channel (including  */

                                       /* the frame_cnt                    */

  int                    (*org_hhc)(

                                    struct neighbour *neigh,

                                    struct hh_cache *hh);

                                       /* Ptr to orig. header_cache_update */

  void                   (*org_hcu)(struct hh_cache *,

                                    struct net_device *,

                                    unsigned char *);

  int  pppbind;                        /* ippp device for bindings         */

  int                                   dialtimeout;    /* How long shall we try on dialing? (jiffies) */

  int                                   dialwait;               /* How long shall we wait after failed attempt? (jiffies) */

  ulong                                 dialstarted;    /* jiffies of first dialing-attempt */

  ulong                                 dialwait_timer; /* jiffies of earliest next dialing-attempt */

  int                                   huptimeout;             /* How long will the connection be up? (seconds) */

#ifdef CONFIG_ISDN_X25

  struct concap_device_ops *dops;      /* callbacks used by encapsulator   */

#endif

  /* use an own struct for that in later versions */

  ulong cisco_myseq;                   /* Local keepalive seq. for Cisco   */

  ulong cisco_mineseen;                /* returned keepalive seq. from remote */

  ulong cisco_yourseq;                 /* Remote keepalive seq. for Cisco  */

  int cisco_keepalive_period;           /* keepalive period */

  ulong cisco_last_slarp_in;            /* jiffie of last keepalive packet we received */

  char cisco_line_state;                /* state of line according to keepalive packets */

  char cisco_debserint;                 /* debugging flag of cisco hdlc with slarp */

  struct timer_list cisco_timer;

  struct tq_struct tqueue;

} isdn_net_local;

/* the interface itself */

typedef struct isdn_net_dev_s {

  isdn_net_local *local;

  isdn_net_local *queue;               /* circular list of all bundled

                                          channels, which are currently

                                          online                           */

  spinlock_t queue_lock;               /* lock to protect queue            */

  void *next;                          /* Pointer to next isdn-interface   */

  struct net_device dev;               /* interface to upper levels        */

#ifdef CONFIG_ISDN_PPP

  ippp_bundle * pb;             /* pointer to the common bundle structure

                                 * with the per-bundle data */

#endif

#ifdef CONFIG_ISDN_X25

  struct concap_proto  *cprot; /* connection oriented encapsulation protocol */

#endif

} isdn_net_dev;

/*===================== End of ip-over-ISDN stuff ===========================*/

/*======================= Start of ISDN-tty stuff ===========================*/

#define ISDN_ASYNC_MAGIC          0x49344C01 /* for paranoia-checking        */

#define ISDN_ASYNC_INITIALIZED    0x80000000 /* port was initialized         */

#define ISDN_ASYNC_CALLOUT_ACTIVE 0x40000000 /* Call out device active       */

#define ISDN_ASYNC_NORMAL_ACTIVE  0x20000000 /* Normal device active         */

#define ISDN_ASYNC_CLOSING        0x08000000 /* Serial port is closing       */

#define ISDN_ASYNC_CTS_FLOW       0x04000000 /* Do CTS flow control          */

#define ISDN_ASYNC_CHECK_CD       0x02000000 /* i.e., CLOCAL                 */

#define ISDN_ASYNC_HUP_NOTIFY         0x0001 /* Notify tty on hangups/closes */

#define ISDN_ASYNC_SESSION_LOCKOUT    0x0100 /* Lock cua opens on session    */

#define ISDN_ASYNC_PGRP_LOCKOUT       0x0200 /* Lock cua opens on pgrp       */

#define ISDN_ASYNC_CALLOUT_NOHUP      0x0400 /* No hangup for cui            */

#define ISDN_ASYNC_SPLIT_TERMIOS      0x0008 /* Sep. termios for dialin/out  */

#define ISDN_SERIAL_XMIT_SIZE           1024 /* Default bufsize for write    */

#define ISDN_SERIAL_XMIT_MAX            4000 /* Maximum bufsize for write    */

#define ISDN_SERIAL_TYPE_NORMAL            1

#define ISDN_SERIAL_TYPE_CALLOUT           2

#ifdef CONFIG_ISDN_AUDIO

/* For using sk_buffs with audio we need some private variables

 * within each sk_buff. For this purpose, we declare a struct here,

 * and put it always at skb->head. A few macros help accessing the

 * variables. Of course, we need to check skb_headroom prior to

 * any access.

 */

typedef struct isdn_audio_skb {

  unsigned short dle_count;

  unsigned char  lock;

} isdn_audio_skb;

#define ISDN_AUDIO_SKB_DLECOUNT(skb) (((isdn_audio_skb*)skb->head)->dle_count)

#define ISDN_AUDIO_SKB_LOCK(skb) (((isdn_audio_skb*)skb->head)->lock)

#endif

/* Private data of AT-command-interpreter */

typedef struct atemu {

        u_char       profile[ISDN_MODEM_NUMREG]; /* Modem-Regs. Profile 0              */

        u_char       mdmreg[ISDN_MODEM_NUMREG];  /* Modem-Registers                    */

        char         pmsn[ISDN_MSNLEN];          /* EAZ/MSNs Profile 0                 */

        char         msn[ISDN_MSNLEN];           /* EAZ/MSN                            */

        char         plmsn[ISDN_LMSNLEN];        /* Listening MSNs Profile 0           */

        char         lmsn[ISDN_LMSNLEN];         /* Listening MSNs                     */

        char         cpn[ISDN_MSNLEN];           /* CalledPartyNumber on incoming call */

        char         connmsg[ISDN_CMSGLEN];      /* CONNECT-Msg from HL-Driver         */

#ifdef CONFIG_ISDN_AUDIO

        u_char       vpar[10];                   /* Voice-parameters                   */

        int          lastDLE;                    /* Flag for voice-coding: DLE seen    */

#endif

        int          mdmcmdl;                    /* Length of Modem-Commandbuffer      */

        int          pluscount;                  /* Counter for +++ sequence           */

        int          lastplus;                   /* Timestamp of last +                */

        int          carrierwait;                /* Seconds of carrier waiting         */

        char         mdmcmd[255];                /* Modem-Commandbuffer                */

        unsigned int charge;                     /* Charge units of current connection */

} atemu;

/* Private data (similar to async_struct in <linux/serial.h>) */

typedef struct modem_info {

  int                   magic;

  int                   flags;           /* defined in tty.h               */

  int                   x_char;          /* xon/xoff character             */

  int                   mcr;             /* Modem control register         */

  int                   msr;             /* Modem status register          */

  int                   lsr;             /* Line status register           */

  int                   line;

  int                   count;           /* # of fd on device              */

  int                   blocked_open;    /* # of blocked opens             */

  long                  session;         /* Session of opening process     */

  long                  pgrp;            /* pgrp of opening process        */

  int                   online;          /* 1 = B-Channel is up, drop data */

                                         /* 2 = B-Channel is up, deliver d.*/

  int                   dialing;         /* Dial in progress or ATA        */

  int                   rcvsched;        /* Receive needs schedule         */

  int                   isdn_driver;     /* Index to isdn-driver           */

  int                   isdn_channel;    /* Index to isdn-channel          */

  int                   drv_index;       /* Index to dev->usage            */

  int                   ncarrier;        /* Flag: schedule NO CARRIER      */

  unsigned char         last_cause[8];   /* Last cause message             */

  unsigned char         last_num[ISDN_MSNLEN];

                                         /* Last phone-number              */

  unsigned char         last_l2;         /* Last layer-2 protocol          */

  unsigned char         last_si;         /* Last service                   */

  unsigned char         last_lhup;       /* Last hangup local?             */

  unsigned char         last_dir;        /* Last direction (in or out)     */

  struct timer_list     nc_timer;        /* Timer for delayed NO CARRIER   */

  int                   send_outstanding;/* # of outstanding send-requests */

  int                   xmit_size;       /* max. # of chars in xmit_buf    */

  int                   xmit_count;      /* # of chars in xmit_buf         */

  unsigned char         *xmit_buf;       /* transmit buffer                */

  struct sk_buff_head   xmit_queue;      /* transmit queue                 */

  atomic_t              xmit_lock;       /* Semaphore for isdn_tty_write   */

#ifdef CONFIG_ISDN_AUDIO

  int                   vonline;         /* Voice-channel status           */

                                         /* Bit 0 = recording              */

                                         /* Bit 1 = playback               */

                                         /* Bit 2 = playback, DLE-ETX seen */

  struct sk_buff_head   dtmf_queue;      /* queue for dtmf results         */

  void                  *adpcms;         /* state for adpcm decompression  */

  void                  *adpcmr;         /* state for adpcm compression    */

  void                  *dtmf_state;     /* state for dtmf decoder         */

  void                  *silence_state;  /* state for silence detection    */

#endif

#ifdef CONFIG_ISDN_TTY_FAX

  struct T30_s          *fax;            /* T30 Fax Group 3 data/interface */

  int                   faxonline;       /* Fax-channel status             */

#endif

  struct tty_struct     *tty;            /* Pointer to corresponding tty   */

  atemu                 emu;             /* AT-emulator data               */

  struct termios        normal_termios;  /* For saving termios structs     */

  struct termios        callout_termios;

  wait_queue_head_t     open_wait, close_wait;

  struct semaphore      write_sem;

} modem_info;

#define ISDN_MODEM_WINSIZE 8

/* Description of one ISDN-tty */

typedef struct {

  int                refcount;                     /* Number of opens        */

  struct tty_driver  tty_modem;                    /* tty-device             */

  struct tty_driver  cua_modem;                    /* cua-device             */

  struct tty_struct  *modem_table[ISDN_MAX_CHANNELS]; /* ?? copied from Orig */

  struct termios     *modem_termios[ISDN_MAX_CHANNELS];

  struct termios     *modem_termios_locked[ISDN_MAX_CHANNELS];

  modem_info         info[ISDN_MAX_CHANNELS];      /* Private data           */

} modem;

/*======================= End of ISDN-tty stuff ============================*/

/*======================== Start of V.110 stuff ============================*/

#define V110_BUFSIZE 1024

typedef struct {

        int nbytes;                    /* 1 Matrixbyte -> nbytes in stream     */

        int nbits;                     /* Number of used bits in streambyte    */

        unsigned char key;             /* Bitmask in stream eg. 11 (nbits=2)   */

        int decodelen;                 /* Amount of data in decodebuf          */

        int SyncInit;                  /* Number of sync frames to send        */

        unsigned char *OnlineFrame;    /* Precalculated V110 idle frame        */

        unsigned char *OfflineFrame;   /* Precalculated V110 sync Frame        */

        int framelen;                  /* Length of frames                     */

        int skbuser;                   /* Number of unacked userdata skbs      */

        int skbidle;                   /* Number of unacked idle/sync skbs     */

        int introducer;                /* Local vars for decoder               */

        int dbit;

        unsigned char b;

        int skbres;                    /* space to reserve in outgoing skb     */

        int maxsize;                   /* maxbufsize of lowlevel driver        */

        unsigned char *encodebuf;      /* temporary buffer for encoding        */

        unsigned char decodebuf[V110_BUFSIZE]; /* incomplete V110 matrices     */

} isdn_v110_stream;

/*========================= End of V.110 stuff =============================*/

/*======================= Start of general stuff ===========================*/

typedef struct {

        char *next;

        char *private;

} infostruct;

#define DRV_FLAG_RUNNING 1

#define DRV_FLAG_REJBUS  2

#define DRV_FLAG_LOADED  4

/* Description of hardware-level-driver */

typedef struct {

        ulong               online;           /* Channel-Online flags             */

        ulong               flags;            /* Misc driver Flags                */

        int                 locks;            /* Number of locks for this driver  */

        int                 channels;         /* Number of channels               */

        wait_queue_head_t   st_waitq;         /* Wait-Queue for status-read's     */

        int                 maxbufsize;       /* Maximum Buffersize supported     */

        unsigned long       pktcount;         /* Until now: unused                */

        int                 stavail;          /* Chars avail on Status-device     */

        isdn_if            *interface;        /* Interface to driver              */

        int                *rcverr;           /* Error-counters for B-Ch.-receive */

        int                *rcvcount;         /* Byte-counters for B-Ch.-receive  */

#ifdef CONFIG_ISDN_AUDIO

        unsigned long      DLEflag;           /* Flags: Insert DLE at next read   */

#endif

        struct sk_buff_head *rpqueue;         /* Pointers to start of Rcv-Queue   */

        wait_queue_head_t  *rcv_waitq;       /* Wait-Queues for B-Channel-Reads  */

        wait_queue_head_t  *snd_waitq;       /* Wait-Queue for B-Channel-Send's  */

        char               msn2eaz[10][ISDN_MSNLEN];  /* Mapping-Table MSN->EAZ   */

} driver;

/* Main driver-data */

typedef struct isdn_devt {

        unsigned short    flags;                       /* Bitmapped Flags:           */

        /*                            */

        int               drivers;                     /* Current number of drivers  */

        int               channels;                    /* Current number of channels */

        int               net_verbose;               /* Verbose-Flag               */

        int               modempoll;                   /* Flag: tty-read active      */

        int               tflags;                    /* Timer-Flags:               */

        /*  see ISDN_TIMER_..defines  */

        int               global_flags;

        infostruct        *infochain;                /* List of open info-devs.    */

        wait_queue_head_t info_waitq;               /* Wait-Queue for isdninfo    */

        struct timer_list timer;                       /* Misc.-function Timer       */

        int               chanmap[ISDN_MAX_CHANNELS];/* Map minor->device-channel  */

        int               drvmap[ISDN_MAX_CHANNELS]; /* Map minor->driver-index    */

        int               usage[ISDN_MAX_CHANNELS];  /* Used by tty/ip/voice       */

        char              num[ISDN_MAX_CHANNELS][ISDN_MSNLEN];

        /* Remote number of active ch.*/

        int               m_idx[ISDN_MAX_CHANNELS];  /* Index for mdm....          */

        driver            *drv[ISDN_MAX_DRIVERS];    /* Array of drivers           */

        isdn_net_dev      *netdev;                     /* Linked list of net-if's    */

        char              drvid[ISDN_MAX_DRIVERS][20];/* Driver-ID                 */

        struct task_struct *profd;                   /* For iprofd                 */

        modem             mdm;                 /* tty-driver-data            */

        isdn_net_dev      *rx_netdev[ISDN_MAX_CHANNELS]; /* rx netdev-pointers     */

        isdn_net_dev      *st_netdev[ISDN_MAX_CHANNELS]; /* stat netdev-pointers   */

        ulong             ibytes[ISDN_MAX_CHANNELS]; /* Statistics incoming bytes  */

        ulong             obytes[ISDN_MAX_CHANNELS]; /* Statistics outgoing bytes  */

        int               v110emu[ISDN_MAX_CHANNELS];/* V.110 emulator-mode 0=none */

        atomic_t          v110use[ISDN_MAX_CHANNELS];/* Usage-Semaphore for stream */

        isdn_v110_stream  *v110[ISDN_MAX_CHANNELS];  /* V.110 private data         */

        struct semaphore  sem;                       /* serialize list access*/

        unsigned long     global_features;

#ifdef CONFIG_DEVFS_FS

        devfs_handle_t devfs_handle_isdninfo;

        devfs_handle_t devfs_handle_isdnctrl;

        devfs_handle_t devfs_handle_isdnX[ISDN_MAX_CHANNELS];

        devfs_handle_t devfs_handle_isdnctrlX[ISDN_MAX_CHANNELS];

#ifdef CONFIG_ISDN_PPP

        devfs_handle_t devfs_handle_ipppX[ISDN_MAX_CHANNELS];

#endif

#endif /* CONFIG_DEVFS_FS */

} isdn_dev;

extern isdn_dev *dev;

#endif /* __KERNEL__ */

#endif /* __ISDN_H__ */