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/* $Id: isdnif.h,v 1.1.1.1 2001-09-10 07:43:48 simons Exp $

 *

 * Linux ISDN subsystem

 *

 * Definition of the interface between the subsystem and its low-level drivers.

 *

 * Copyright 1994-1998  by Fritz Elfert (fritz@isdn4linux.de)

 * Copyright 1995,96    Thinking Objects Software GmbH Wuerzburg

 *

 * 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  2001/07/02 17:57:59  simons

 * Initial revision

 *

 * Revision 1.20.2.2  1998/11/05 22:13:33  fritz

 * Changed mail-address.

 *

 * Revision 1.20.2.1  1998/03/07 23:00:50  tsbogend

 * added defines for Linux/Alpha 2.0.x with alpha-patches

 *

 * Revision 1.20  1997/05/27 15:18:06  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 1.19  1997/03/25 23:13:56  keil

 * NI-1 US protocol

 *

 * Revision 1.18  1997/03/04 22:09:18  calle

 * Change macros copy_from_user and copy_to_user in inline function.

 * These are now correct replacements of the functions for 2.1.xx

 *

 * Revision 1.17  1997/02/10 21:12:53  fritz

 * More setup-interface changes.

 *

 * Revision 1.16  1997/02/10 19:42:57  fritz

 * New interface for reporting incoming calls.

 *

 * Revision 1.15  1997/02/09 00:18:42  keil

 * leased line support

 *

 * Revision 1.14  1997/02/03 23:43:00  fritz

 * Misc changes for Kernel 2.1.X compatibility.

 *

 * Revision 1.13  1996/11/13 02:39:59  fritz

 * More compatibility changes.

 *

 * Revision 1.12  1996/11/06 17:38:48  keil

 * more changes for 2.1.X

 *

 * Revision 1.11  1996/10/23 11:59:42  fritz

 * More compatibility changes.

 *

 * Revision 1.10  1996/10/22 23:14:19  fritz

 * Changes for compatibility to 2.0.X and 2.1.X kernels.

 *

 * Revision 1.9  1996/06/06 21:24:24  fritz

 * Started adding support for suspend/resume.

 *

 * Revision 1.8  1996/05/18 01:45:37  fritz

 * More spelling corrections.

 *

 * Revision 1.7  1996/05/18 01:37:19  fritz

 * Added spelling corrections and some minor changes

 * to stay in sync with kernel.

 *

 * Revision 1.6  1996/05/17 03:59:28  fritz

 * Marked rcvcallb and writebuf obsolete.

 *

 * Revision 1.5  1996/05/01 11:43:54  fritz

 * Removed STANDALONE

 *

 * Revision 1.4  1996/05/01 11:38:40  fritz

 * Added ISDN_FEATURE_L2_TRANS

 *

 * Revision 1.3  1996/04/29 22:57:54  fritz

 * Added driverId and channel parameters to

 * writecmd() and readstat().

 * Added constant for voice-support.

 *

 * Revision 1.2  1996/04/20 17:02:40  fritz

 * Changes to support skbuffs for Lowlevel-Drivers.

 * Misc. typos

 *

 * Revision 1.1  1996/01/09 05:50:51  fritz

 * Initial revision

 *

 */

#ifndef isdnif_h

#define isdnif_h

/*

 * Values for general protocol-selection

 */

#define ISDN_PTYPE_UNKNOWN   0   /* Protocol undefined   */

#define ISDN_PTYPE_1TR6      1   /* german 1TR6-protocol */

#define ISDN_PTYPE_EURO      2   /* EDSS1-protocol       */

#define ISDN_PTYPE_LEASED    3   /* for leased lines     */

#define ISDN_PTYPE_NI1       4   /* US NI-1 protocol     */

/*

 * Values for Layer-2-protocol-selection

 */

#define ISDN_PROTO_L2_X75I   0   /* X75/LAPB with I-Frames      */

#define ISDN_PROTO_L2_X75UI  1   /* X75/LAPB with UI-Frames     */

#define ISDN_PROTO_L2_X75BUI 2   /* X75/LAPB with UI-Frames     */

#define ISDN_PROTO_L2_HDLC   3   /* HDLC                        */

#define ISDN_PROTO_L2_TRANS  4   /* Transparent (Voice)         */

/*

 * Values for Layer-3-protocol-selection

 */

#define ISDN_PROTO_L3_TRANS  0   /* Transparent                 */

#ifdef __KERNEL__

#include <linux/skbuff.h>

/*

 * Commands from linklevel to lowlevel

 *

 */

#define ISDN_CMD_IOCTL   0       /* Perform ioctl                         */

#define ISDN_CMD_DIAL     1       /* Dial out                              */

#define ISDN_CMD_ACCEPTD  2       /* Accept an incoming call on D-Chan.    */

#define ISDN_CMD_ACCEPTB  3       /* Request B-Channel connect.            */

#define ISDN_CMD_HANGUP   4       /* Hangup                                */

#define ISDN_CMD_CLREAZ   5       /* Clear EAZ(s) of channel               */

#define ISDN_CMD_SETEAZ   6       /* Set EAZ(s) of channel                 */

#define ISDN_CMD_GETEAZ   7       /* Get EAZ(s) of channel                 */

#define ISDN_CMD_SETSIL   8       /* Set Service-Indicator-List of channel */

#define ISDN_CMD_GETSIL   9       /* Get Service-Indicator-List of channel */

#define ISDN_CMD_SETL2   10       /* Set B-Chan. Layer2-Parameter          */

#define ISDN_CMD_GETL2   11       /* Get B-Chan. Layer2-Parameter          */

#define ISDN_CMD_SETL3   12       /* Set B-Chan. Layer3-Parameter          */

#define ISDN_CMD_GETL3   13       /* Get B-Chan. Layer3-Parameter          */

#define ISDN_CMD_LOCK    14       /* Signal usage by upper levels          */

#define ISDN_CMD_UNLOCK  15       /* Release usage-lock                    */

#define ISDN_CMD_SUSPEND 16       /* Suspend connection                    */

#define ISDN_CMD_RESUME  17       /* Resume connection                     */

/*

 * Status-Values delivered from lowlevel to linklevel via

 * statcallb().

 *

 */

#define ISDN_STAT_STAVAIL 256    /* Raw status-data available             */

#define ISDN_STAT_ICALL   257    /* Incoming call detected                */

#define ISDN_STAT_RUN     258    /* Signal protocol-code is running       */

#define ISDN_STAT_STOP    259    /* Signal halt of protocol-code          */

#define ISDN_STAT_DCONN   260    /* Signal D-Channel connect              */

#define ISDN_STAT_BCONN   261    /* Signal B-Channel connect              */

#define ISDN_STAT_DHUP    262    /* Signal D-Channel disconnect           */

#define ISDN_STAT_BHUP    263    /* Signal B-Channel disconnect           */

#define ISDN_STAT_CINF    264    /* Charge-Info                           */

#define ISDN_STAT_LOAD    265    /* Signal new lowlevel-driver is loaded  */

#define ISDN_STAT_UNLOAD  266    /* Signal unload of lowlevel-driver      */

#define ISDN_STAT_BSENT   267    /* Signal packet sent                    */

#define ISDN_STAT_NODCH   268    /* Signal no D-Channel                   */

#define ISDN_STAT_ADDCH   269    /* Add more Channels                     */

#define ISDN_STAT_CAUSE   270    /* Cause-Message                         */

/*

 * Values for feature-field of interface-struct.

 */

/* Layer 2 */

#define ISDN_FEATURE_L2_X75I    (0x0001 << ISDN_PROTO_L2_X75I)

#define ISDN_FEATURE_L2_X75UI   (0x0001 << ISDN_PROTO_L2_X75UI)

#define ISDN_FEATURE_L2_X75BUI  (0x0001 << ISDN_PROTO_L2_X75BUI)

#define ISDN_FEATURE_L2_HDLC    (0x0001 << ISDN_PROTO_L2_HDLC)

#define ISDN_FEATURE_L2_TRANS   (0x0001 << ISDN_PROTO_L2_TRANS)

/* Layer 3 */

#define ISDN_FEATURE_L3_TRANS   (0x0100 << ISDN_PROTO_L3_TRANS)

/* Signaling */

#define ISDN_FEATURE_P_UNKNOWN  (0x1000 << ISDN_PTYPE_UNKNOWN)

#define ISDN_FEATURE_P_1TR6     (0x1000 << ISDN_PTYPE_1TR6)

#define ISDN_FEATURE_P_EURO     (0x1000 << ISDN_PTYPE_EURO)

#define ISDN_FEATURE_P_NI1      (0x1000 << ISDN_PTYPE_NI1)

typedef struct setup_parm {

    char phone[32];         /* Remote Phone-Number */

    char eazmsn[32];        /* Local EAZ or MSN    */

    unsigned char si1;      /* Service Indicator 1 */

    unsigned char si2;      /* Service Indicator 2 */

    unsigned char plan;     /* Numbering plan      */

    unsigned char screen;   /* Screening info      */

} setup_parm;

/*

 * Structure for exchanging above infos

 *

 */

typedef struct {

  int   driver;                  /* Lowlevel-Driver-ID                    */

  int   command;                 /* Command or Status (see above)         */

  ulong arg;                     /* Additional Data                       */

  union {

        char  num[50];               /* Additional Data                       */

        setup_parm setup;

  } parm;

} isdn_ctrl;

/*

 * The interface-struct itself (initialized at load-time of lowlevel-driver)

 *

 * See Documentation/isdn/INTERFACE for a description, how the communication

 * between the ISDN subsystem and its drivers is done.

 *

 */

typedef struct {

  /* Number of channels supported by this driver

   */

  int channels;

  /*

   * Maximum Size of transmit/receive-buffer this driver supports.

   */

  int maxbufsize;

  /* Feature-Flags for this driver.

   * See defines ISDN_FEATURE_... for Values

   */

  unsigned long features;

  /*

   * Needed for calculating

   * dev->hard_header_len = linklayer header + hl_hdrlen;

   * Drivers, not supporting sk_buff's should set this to 0.

   */

  unsigned short hl_hdrlen;

  /* Receive-Callback

   * Parameters:

   *             int    Driver-ID

   *             int    local channel-number (0 ...)

   *             u_char pointer to received data (in Kernel-Space, volatile)

   *             int    length of data

   *

   * NOTE: This callback is obsolete, and will be removed when all

   *       current LL-drivers support rcvcall_skb. Do NOT use for new

   *       drivers.

   */

  void (*rcvcallb)(int, int, u_char*, int);

  /*

   * Receive-Callback using sk_buff's

   * Parameters:

   *             int                    Driver-ID

   *             int                    local channel-number (0 ...)

   *             struct sk_buff *skb    received Data

   */

  void (*rcvcallb_skb)(int, int, struct sk_buff *);

  /* Status-Callback

   * Parameters:

   *             isdn_ctrl*

   *                   driver  = Driver ID.

   *                   command = One of above ISDN_STAT_... constants.

   *                   arg     = depending on status-type.

   *                   num     = depending on status-type.

   */

  int (*statcallb)(isdn_ctrl*);

  /* Send command

   * Parameters:

   *             isdn_ctrl*

   *                   driver  = Driver ID.

   *                   command = One of above ISDN_CMD_... constants.

   *                   arg     = depending on command.

   *                   num     = depending on command.

   */

  int (*command)(isdn_ctrl*);

  /* Send Data

   * Parameters:

   *             int    driverId

   *             int    local channel-number (0 ...)

   *             u_char pointer to data

   *             int    length of data

   *             int    Flag: 0 = Call form Kernel-Space (use memcpy,

   *                              no schedule allowed)

   *                          1 = Data is in User-Space (use memcpy_fromfs,

   *                              may schedule)

   *

   * NOTE: This call is obsolete, and will be removed when all

   *       current LL-drivers support writebuf_skb. Do NOT use for new

   *       drivers.

   */

  int (*writebuf)(int, int, const u_char*, int, int);

  /*

   * Send data using sk_buff's

   * Parameters:

   *             int                    driverId

   *             int                    local channel-number (0...)

   *             struct sk_buff *skb    Data to send

   */

  int (*writebuf_skb) (int, int, struct sk_buff *);

  /* Send raw D-Channel-Commands

   * Parameters:

   *             u_char pointer data

   *             int    length of data

   *             int    Flag: 0 = Call form Kernel-Space (use memcpy,

   *                              no schedule allowed)

   *                          1 = Data is in User-Space (use memcpy_fromfs,

   *                              may schedule)

   *             int    driverId

   *             int    local channel-number (0 ...)

   */

  int (*writecmd)(const u_char*, int, int, int, int);

  /* Read raw Status replies

   *             u_char pointer data (volatile)

   *             int    length of buffer

   *             int    Flag: 0 = Call form Kernel-Space (use memcpy,

   *                              no schedule allowed)

   *                          1 = Data is in User-Space (use memcpy_fromfs,

   *                              may schedule)

   *             int    driverId

   *             int    local channel-number (0 ...)

   */

  int (*readstat)(u_char*, int, int, int, int);

  char id[20];

} isdn_if;

/*

 * Function which must be called by lowlevel-driver at loadtime with

 * the following fields of above struct set:

 *

 * channels     Number of channels that will be supported.

 * hl_hdrlen    Space to preserve in sk_buff's when sending. Drivers, not

 *              supporting sk_buff's should set this to 0.

 * command      Address of Command-Handler.

 * features     Bitwise coded Features of this driver. (use ISDN_FEATURE_...)

 * writebuf     Address of Send-Command-Handler. OBSOLETE do NOT use anymore.

 * writebuf_skb Address of Skbuff-Send-Handler. (NULL if not supported)

 * writecmd        "    "  D-Channel  " which accepts raw D-Ch-Commands.

 * readstat        "    "  D-Channel  " which delivers raw Status-Data.

 *

 * The linklevel-driver fills the following fields:

 *

 * channels      Driver-ID assigned to this driver. (Must be used on all

 *               subsequent callbacks.

 * rcvcallb      Address of handler for received data. OBSOLETE, do NOT use anymore.

 * rcvcallb_skb  Address of handler for received Skbuff's. (NULL if not supp.)

 * statcallb        "    "     "    for status-changes.

 *

 */

extern int register_isdn(isdn_if*);

/* Compatibility Linux-2.0.X <-> Linux-2.1.X */

#ifndef LINUX_VERSION_CODE

#include <linux/version.h>

#endif

#if (LINUX_VERSION_CODE < 0x020100)

#include <linux/mm.h>

static inline unsigned long copy_from_user(void *to, const void *from, unsigned long n)

{

        int i;

        if ((i = verify_area(VERIFY_READ, from, n)) != 0)

                return i;

        memcpy_fromfs(to, from, n);

        return 0;

}

static inline unsigned long copy_to_user(void *to, const void *from, unsigned long n)

{

        int i;

        if ((i = verify_area(VERIFY_WRITE, to, n)) != 0)

                return i;

        memcpy_tofs(to, from, n);

        return 0;

}

#define GET_USER(x, addr) ( x = get_user(addr) )

#ifdef __alpha__ /* needed for 2.0.x with alpha-patches */

#define RWTYPE long

#define LSTYPE long

#define RWARG unsigned long

#else

#define RWTYPE int

#define LSTYPE int

#define RWARG int

#endif

#define LSARG off_t

#else

#include <asm/uaccess.h>

#define GET_USER get_user

#define PUT_USER put_user

#define RWTYPE long

#define LSTYPE long long

#define RWARG unsigned long

#define LSARG long long

#endif

#if (LINUX_VERSION_CODE < 0x02010F)

#define SET_SKB_FREE(x) ( x->free = 1 )

#else

#define SET_SKB_FREE(x)

#endif

#if (LINUX_VERSION_CODE < 0x02011F)

#define CLOSETYPE void

#define CLOSEVAL

#else

#define CLOSETYPE int

#define CLOSEVAL (0)

#endif

#if (LINUX_VERSION_CODE < 0x020125)

#define test_and_clear_bit clear_bit

#define test_and_set_bit set_bit

#endif

#endif /* __KERNEL__ */

#endif /* isdnif_h */