include/linux/isdnif.h

   1 /* $Id: isdnif.h,v 1.35 2000/06/16 13:19:38 keil Exp $
   2
   3  * Linux ISDN subsystem
   4  *
   5  * Definition of the interface between the subsystem and its low-level drivers.
   6  *
   7  * Copyright 1994,95,96 by Fritz Elfert (fritz@isdn4linux.de)
   8  * Copyright 1995,96    Thinking Objects Software GmbH Wuerzburg
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2, or (at your option)
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  *
  24  */
  25
  26 #ifndef isdnif_h
  27 #define isdnif_h
  28
  29 #include <linux/config.h>
  30
  31 /*
  32  * Values for general protocol-selection
  33  */
  34 #define ISDN_PTYPE_UNKNOWN   0   /* Protocol undefined   */
  35 #define ISDN_PTYPE_1TR6      1   /* german 1TR6-protocol */
  36 #define ISDN_PTYPE_EURO      2   /* EDSS1-protocol       */
  37 #define ISDN_PTYPE_LEASED    3   /* for leased lines     */
  38 #define ISDN_PTYPE_NI1       4   /* US NI-1 protocol     */
  39 #define ISDN_PTYPE_MAX       7   /* Max. 8 Protocols     */
  40
  41 /*
  42  * Values for Layer-2-protocol-selection
  43  */
  44 #define ISDN_PROTO_L2_X75I   0   /* X75/LAPB with I-Frames            */
  45 #define ISDN_PROTO_L2_X75UI  1   /* X75/LAPB with UI-Frames           */
  46 #define ISDN_PROTO_L2_X75BUI 2   /* X75/LAPB with UI-Frames           */
  47 #define ISDN_PROTO_L2_HDLC   3   /* HDLC                              */
  48 #define ISDN_PROTO_L2_TRANS  4   /* Transparent (Voice)               */
  49 #define ISDN_PROTO_L2_X25DTE 5   /* X25/LAPB DTE mode                 */
  50 #define ISDN_PROTO_L2_X25DCE 6   /* X25/LAPB DCE mode                 */
  51 #define ISDN_PROTO_L2_V11096 7   /* V.110 bitrate adaption 9600 Baud  */
  52 #define ISDN_PROTO_L2_V11019 8   /* V.110 bitrate adaption 19200 Baud */
  53 #define ISDN_PROTO_L2_V11038 9   /* V.110 bitrate adaption 38400 Baud */
  54 #define ISDN_PROTO_L2_MODEM  10  /* Analog Modem on Board */
  55 #define ISDN_PROTO_L2_FAX    11  /* Fax Group 2/3         */
  56 #define ISDN_PROTO_L2_MAX    15  /* Max. 16 Protocols                 */
  57
  58 /*
  59  * Values for Layer-3-protocol-selection
  60  */
  61 #define ISDN_PROTO_L3_TRANS     0       /* Transparent */
  62 #define ISDN_PROTO_L3_TRANSDSP  1       /* Transparent with DSP */
  63 #define ISDN_PROTO_L3_FCLASS2   2       /* Fax Group 2/3 CLASS 2 */
  64 #define ISDN_PROTO_L3_FCLASS1   3       /* Fax Group 2/3 CLASS 1 */
  65 #define ISDN_PROTO_L3_MAX       7       /* Max. 8 Protocols */
  66
  67 #ifdef __KERNEL__
  68
  69 #include <linux/skbuff.h>
  70
  71 /***************************************************************************/
  72 /* Extensions made by Werner Cornelius (werner@ikt.de)                     */
  73 /*                                                                         */
  74 /* The proceed command holds a incoming call in a state to leave processes */
  75 /* enough time to check whether ist should be accepted.                    */
  76 /* The PROT_IO Command extends the interface to make protocol dependant    */
  77 /* features available (call diversion, call waiting...).                   */
  78 /*                                                                         */
  79 /* The PROT_IO Command is executed with the desired driver id and the arg  */
  80 /* parameter coded as follows:                                             */
  81 /* The lower 8 bits of arg contain the desired protocol from ISDN_PTYPE    */
  82 /* definitions. The upper 24 bits represent the protocol specific cmd/stat.*/
  83 /* Any additional data is protocol and command specific.                   */
  84 /* This mechanism also applies to the statcallb callback STAT_PROT.        */
  85 /*                                                                         */
  86 /* This suggested extension permits an easy expansion of protocol specific */
  87 /* handling. Extensions may be added at any time without changing the HL   */
  88 /* driver code and not getting conflicts without certifications.           */
  89 /* The well known CAPI 2.0 interface handles such extensions in a similar  */
  90 /* way. Perhaps a protocol specific module may be added and separately     */
  91 /* loaded and linked to the basic isdn module for handling.                */
  92 /***************************************************************************/
  93
  94 /*****************/
  95 /* DSS1 commands */
  96 /*****************/
  97 #define DSS1_CMD_INVOKE       ((0x00 << 8) | ISDN_PTYPE_EURO)   /* invoke a supplementary service */
  98 #define DSS1_CMD_INVOKE_ABORT ((0x01 << 8) | ISDN_PTYPE_EURO)   /* abort a invoke cmd */
  99
 100 /*******************************/
 101 /* DSS1 Status callback values */
 102 /*******************************/
 103 #define DSS1_STAT_INVOKE_RES  ((0x80 << 8) | ISDN_PTYPE_EURO)   /* Result for invocation */
 104 #define DSS1_STAT_INVOKE_ERR  ((0x81 << 8) | ISDN_PTYPE_EURO)   /* Error Return for invocation */
 105 #define DSS1_STAT_INVOKE_BRD  ((0x82 << 8) | ISDN_PTYPE_EURO)   /* Deliver invoke broadcast info */
 106
 107
 108 /*********************************************************************/
 109 /* structures for DSS1 commands and callback                         */
 110 /*                                                                   */
 111 /* An action is invoked by sending a DSS1_CMD_INVOKE. The ll_id, proc*/
 112 /* timeout, datalen and data fields must be set before calling.      */
 113 /*                                                                   */
 114 /* The return value is a positive hl_id value also delivered in the  */
 115 /* hl_id field. A value of zero signals no more left hl_id capacitys.*/
 116 /* A negative return value signals errors in LL. So if the return    */
 117 /* value is <= 0 no action in LL will be taken -> request ignored    */
 118 /*                                                                   */
 119 /* The timeout field must be filled with a positive value specifying */
 120 /* the amount of time the INVOKED process waits for a reaction from  */
 121 /* the network.                                                      */
 122 /* If a response (either error or result) is received during this    */
 123 /* intervall, a reporting callback is initiated and the process will */
 124 /* be deleted, the hl identifier will be freed.                      */
 125 /* If no response is received during the specified intervall, a error*/
 126 /* callback is initiated with timeout set to -1 and a datalen set    */
 127 /* to 0.                                                             */
 128 /* If timeout is set to a value <= 0 during INVOCATION the process is*/
 129 /* immediately deleted after sending the data. No callback occurs !  */
 130 /*                                                                   */
 131 /* A currently waiting process may be aborted with INVOKE_ABORT. No  */
 132 /* callback will occur when a process has been aborted.              */
 133 /*                                                                   */
 134 /* Broadcast invoke frames from the network are reported via the     */
 135 /* STAT_INVOKE_BRD callback. The ll_id is set to 0, the other fields */
 136 /* are supplied by the network and not by the HL.                    */
 137 /*********************************************************************/
 138
 139 /*****************/
 140 /* NI1 commands */
 141 /*****************/
 142 #define NI1_CMD_INVOKE       ((0x00 << 8) | ISDN_PTYPE_NI1)   /* invoke a supplementary service */
 143 #define NI1_CMD_INVOKE_ABORT ((0x01 << 8) | ISDN_PTYPE_NI1)   /* abort a invoke cmd */
 144
 145 /*******************************/
 146 /* NI1 Status callback values */
 147 /*******************************/
 148 #define NI1_STAT_INVOKE_RES  ((0x80 << 8) | ISDN_PTYPE_NI1)   /* Result for invocation */
 149 #define NI1_STAT_INVOKE_ERR  ((0x81 << 8) | ISDN_PTYPE_NI1)   /* Error Return for invocation */
 150 #define NI1_STAT_INVOKE_BRD  ((0x82 << 8) | ISDN_PTYPE_NI1)   /* Deliver invoke broadcast info */
 151
 152 typedef struct
 153   { ulong ll_id; /* ID supplied by LL when executing    */
 154                  /* a command and returned by HL for    */
 155                  /* INVOKE_RES and INVOKE_ERR           */
 156     int hl_id;   /* ID supplied by HL when called       */
 157                  /* for executing a cmd and delivered   */
 158                  /* for results and errors              */
 159                  /* must be supplied by LL when aborting*/
 160     int proc;    /* invoke procedure used by CMD_INVOKE */
 161                  /* returned by callback and broadcast  */
 162     int timeout; /* timeout for INVOKE CMD in ms        */
 163                  /* -1  in stat callback when timed out */
 164                  /* error value when error callback     */
 165     int datalen; /* length of cmd or stat data          */
 166     u_char *data;/* pointer to data delivered or send   */
 167   } isdn_cmd_stat;
 168
 169 /*
 170  * Commands from linklevel to lowlevel
 171  *
 172  */
 173 #define ISDN_CMD_IOCTL    0       /* Perform ioctl                         */
 174 #define ISDN_CMD_DIAL     1       /* Dial out                              */
 175 #define ISDN_CMD_ACCEPTD  2       /* Accept an incoming call on D-Chan.    */
 176 #define ISDN_CMD_ACCEPTB  3       /* Request B-Channel connect.            */
 177 #define ISDN_CMD_HANGUP   4       /* Hangup                                */
 178 #define ISDN_CMD_CLREAZ   5       /* Clear EAZ(s) of channel               */
 179 #define ISDN_CMD_SETEAZ   6       /* Set EAZ(s) of channel                 */
 180 #define ISDN_CMD_GETEAZ   7       /* Get EAZ(s) of channel                 */
 181 #define ISDN_CMD_SETSIL   8       /* Set Service-Indicator-List of channel */
 182 #define ISDN_CMD_GETSIL   9       /* Get Service-Indicator-List of channel */
 183 #define ISDN_CMD_SETL2   10       /* Set B-Chan. Layer2-Parameter          */
 184 #define ISDN_CMD_GETL2   11       /* Get B-Chan. Layer2-Parameter          */
 185 #define ISDN_CMD_SETL3   12       /* Set B-Chan. Layer3-Parameter          */
 186 #define ISDN_CMD_GETL3   13       /* Get B-Chan. Layer3-Parameter          */
 187 #define ISDN_CMD_LOCK    14       /* Signal usage by upper levels          */
 188 #define ISDN_CMD_UNLOCK  15       /* Release usage-lock                    */
 189 #define ISDN_CMD_SUSPEND 16       /* Suspend connection                    */
 190 #define ISDN_CMD_RESUME  17       /* Resume connection                     */
 191 #define ISDN_CMD_PROCEED 18       /* Proceed with call establishment       */
 192 #define ISDN_CMD_ALERT   19       /* Alert after Proceeding                */
 193 #define ISDN_CMD_REDIR   20       /* Redir a incoming call                 */
 194 #define ISDN_CMD_PROT_IO 21       /* Protocol specific commands            */
 195 #define CAPI_PUT_MESSAGE 22       /* CAPI message send down or up          */
 196 #define ISDN_CMD_FAXCMD  23       /* FAX commands to HL-driver             */
 197 #define ISDN_CMD_AUDIO   24       /* DSP, DTMF, ... settings               */
 198
 199 /*
 200  * Status-Values delivered from lowlevel to linklevel via
 201  * statcallb().
 202  *
 203  */
 204 #define ISDN_STAT_STAVAIL 256    /* Raw status-data available             */
 205 #define ISDN_STAT_ICALL   257    /* Incoming call detected                */
 206 #define ISDN_STAT_RUN     258    /* Signal protocol-code is running       */
 207 #define ISDN_STAT_STOP    259    /* Signal halt of protocol-code          */
 208 #define ISDN_STAT_DCONN   260    /* Signal D-Channel connect              */
 209 #define ISDN_STAT_BCONN   261    /* Signal B-Channel connect              */
 210 #define ISDN_STAT_DHUP    262    /* Signal D-Channel disconnect           */
 211 #define ISDN_STAT_BHUP    263    /* Signal B-Channel disconnect           */
 212 #define ISDN_STAT_CINF    264    /* Charge-Info                           */
 213 #define ISDN_STAT_LOAD    265    /* Signal new lowlevel-driver is loaded  */
 214 #define ISDN_STAT_UNLOAD  266    /* Signal unload of lowlevel-driver      */
 215 #define ISDN_STAT_BSENT   267    /* Signal packet sent                    */
 216 #define ISDN_STAT_NODCH   268    /* Signal no D-Channel                   */
 217 #define ISDN_STAT_ADDCH   269    /* Add more Channels                     */
 218 #define ISDN_STAT_CAUSE   270    /* Cause-Message                         */
 219 #define ISDN_STAT_ICALLW  271    /* Incoming call without B-chan waiting  */
 220 #define ISDN_STAT_REDIR   272    /* Redir result                          */
 221 #define ISDN_STAT_PROT    273    /* protocol IO specific callback         */
 222 #define ISDN_STAT_DISPLAY 274    /* deliver a received display message    */
 223 #define ISDN_STAT_L1ERR   275    /* Signal Layer-1 Error                  */
 224 #define ISDN_STAT_FAXIND  276    /* FAX indications from HL-driver        */
 225 #define ISDN_STAT_AUDIO   277    /* DTMF, DSP indications                 */
 226 #define ISDN_STAT_DISCH   278    /* Disable/Enable channel usage          */
 227
 228 /*
 229  * Audio commands
 230  */
 231 #define ISDN_AUDIO_SETDD        0       /* Set DTMF detection           */
 232 #define ISDN_AUDIO_DTMF         1       /* Rx/Tx DTMF                   */
 233
 234 /*
 235  * Values for errcode field
 236  */
 237 #define ISDN_STAT_L1ERR_SEND 1
 238 #define ISDN_STAT_L1ERR_RECV 2
 239
 240 /*
 241  * Values for feature-field of interface-struct.
 242  */
 243 /* Layer 2 */
 244 #define ISDN_FEATURE_L2_X75I    (0x0001 << ISDN_PROTO_L2_X75I)
 245 #define ISDN_FEATURE_L2_X75UI   (0x0001 << ISDN_PROTO_L2_X75UI)
 246 #define ISDN_FEATURE_L2_X75BUI  (0x0001 << ISDN_PROTO_L2_X75BUI)
 247 #define ISDN_FEATURE_L2_HDLC    (0x0001 << ISDN_PROTO_L2_HDLC)
 248 #define ISDN_FEATURE_L2_TRANS   (0x0001 << ISDN_PROTO_L2_TRANS)
 249 #define ISDN_FEATURE_L2_X25DTE  (0x0001 << ISDN_PROTO_L2_X25DTE)
 250 #define ISDN_FEATURE_L2_X25DCE  (0x0001 << ISDN_PROTO_L2_X25DCE)
 251 #define ISDN_FEATURE_L2_V11096  (0x0001 << ISDN_PROTO_L2_V11096)
 252 #define ISDN_FEATURE_L2_V11019  (0x0001 << ISDN_PROTO_L2_V11019)
 253 #define ISDN_FEATURE_L2_V11038  (0x0001 << ISDN_PROTO_L2_V11038)
 254 #define ISDN_FEATURE_L2_MODEM   (0x0001 << ISDN_PROTO_L2_MODEM)
 255 #define ISDN_FEATURE_L2_FAX     (0x0001 << ISDN_PROTO_L2_FAX)
 256
 257 #define ISDN_FEATURE_L2_MASK    (0x0FFFF) /* Max. 16 protocols */
 258 #define ISDN_FEATURE_L2_SHIFT   (0)
 259
 260 /* Layer 3 */
 261 #define ISDN_FEATURE_L3_TRANS   (0x10000 << ISDN_PROTO_L3_TRANS)
 262 #define ISDN_FEATURE_L3_TRANSDSP (0x10000 << ISDN_PROTO_L3_TRANSDSP)
 263 #define ISDN_FEATURE_L3_FCLASS2 (0x10000 << ISDN_PROTO_L3_FCLASS2)
 264 #define ISDN_FEATURE_L3_FCLASS1 (0x10000 << ISDN_PROTO_L3_FCLASS1)
 265
 266 #define ISDN_FEATURE_L3_MASK    (0x0FF0000) /* Max. 8 Protocols */
 267 #define ISDN_FEATURE_L3_SHIFT   (16)
 268
 269 /* Signaling */
 270 #define ISDN_FEATURE_P_UNKNOWN  (0x1000000 << ISDN_PTYPE_UNKNOWN)
 271 #define ISDN_FEATURE_P_1TR6     (0x1000000 << ISDN_PTYPE_1TR6)
 272 #define ISDN_FEATURE_P_EURO     (0x1000000 << ISDN_PTYPE_EURO)
 273 #define ISDN_FEATURE_P_NI1      (0x1000000 << ISDN_PTYPE_NI1)
 274
 275 #define ISDN_FEATURE_P_MASK     (0x0FF000000) /* Max. 8 Protocols */
 276 #define ISDN_FEATURE_P_SHIFT    (24)
 277
 278 typedef struct setup_parm {
 279     unsigned char phone[32];    /* Remote Phone-Number */
 280     unsigned char eazmsn[32];   /* Local EAZ or MSN    */
 281     unsigned char si1;      /* Service Indicator 1 */
 282     unsigned char si2;      /* Service Indicator 2 */
 283     unsigned char plan;     /* Numbering plan      */
 284     unsigned char screen;   /* Screening info      */
 285 } setup_parm;
 286
 287
 288 #ifdef CONFIG_ISDN_TTY_FAX
 289 /* T.30 Fax G3 */
 290
 291 #define FAXIDLEN 21
 292
 293 typedef struct T30_s {
 294         /* session parameters */
 295         __u8 resolution         __attribute__ ((packed));
 296         __u8 rate               __attribute__ ((packed));
 297         __u8 width              __attribute__ ((packed));
 298         __u8 length             __attribute__ ((packed));
 299         __u8 compression        __attribute__ ((packed));
 300         __u8 ecm                __attribute__ ((packed));
 301         __u8 binary             __attribute__ ((packed));
 302         __u8 scantime           __attribute__ ((packed));
 303         __u8 id[FAXIDLEN]       __attribute__ ((packed));
 304         /* additional parameters */
 305         __u8 phase              __attribute__ ((packed));
 306         __u8 direction          __attribute__ ((packed));
 307         __u8 code               __attribute__ ((packed));
 308         __u8 badlin             __attribute__ ((packed));
 309         __u8 badmul             __attribute__ ((packed));
 310         __u8 bor                __attribute__ ((packed));
 311         __u8 fet                __attribute__ ((packed));
 312         __u8 pollid[FAXIDLEN]   __attribute__ ((packed));
 313         __u8 cq                 __attribute__ ((packed));
 314         __u8 cr                 __attribute__ ((packed));
 315         __u8 ctcrty             __attribute__ ((packed));
 316         __u8 minsp              __attribute__ ((packed));
 317         __u8 phcto              __attribute__ ((packed));
 318         __u8 rel                __attribute__ ((packed));
 319         __u8 nbc                __attribute__ ((packed));
 320         /* remote station parameters */
 321         __u8 r_resolution       __attribute__ ((packed));
 322         __u8 r_rate             __attribute__ ((packed));
 323         __u8 r_width            __attribute__ ((packed));
 324         __u8 r_length           __attribute__ ((packed));
 325         __u8 r_compression      __attribute__ ((packed));
 326         __u8 r_ecm              __attribute__ ((packed));
 327         __u8 r_binary           __attribute__ ((packed));
 328         __u8 r_scantime         __attribute__ ((packed));
 329         __u8 r_id[FAXIDLEN]     __attribute__ ((packed));
 330         __u8 r_code             __attribute__ ((packed));
 331 } T30_s;
 332
 333 #define ISDN_TTY_FAX_CONN_IN    0
 334 #define ISDN_TTY_FAX_CONN_OUT   1
 335
 336 #define ISDN_TTY_FAX_FCON       0
 337 #define ISDN_TTY_FAX_DIS        1
 338 #define ISDN_TTY_FAX_FTT        2
 339 #define ISDN_TTY_FAX_MCF        3
 340 #define ISDN_TTY_FAX_DCS        4
 341 #define ISDN_TTY_FAX_TRAIN_OK   5
 342 #define ISDN_TTY_FAX_EOP        6
 343 #define ISDN_TTY_FAX_EOM        7
 344 #define ISDN_TTY_FAX_MPS        8
 345 #define ISDN_TTY_FAX_DTC        9
 346 #define ISDN_TTY_FAX_RID        10
 347 #define ISDN_TTY_FAX_HNG        11
 348 #define ISDN_TTY_FAX_DT         12
 349 #define ISDN_TTY_FAX_FCON_I     13
 350 #define ISDN_TTY_FAX_DR         14
 351 #define ISDN_TTY_FAX_ET         15
 352 #define ISDN_TTY_FAX_CFR        16
 353 #define ISDN_TTY_FAX_PTS        17
 354 #define ISDN_TTY_FAX_SENT       18
 355
 356 #define ISDN_FAX_PHASE_IDLE     0
 357 #define ISDN_FAX_PHASE_A        1
 358 #define ISDN_FAX_PHASE_B        2
 359 #define ISDN_FAX_PHASE_C        3
 360 #define ISDN_FAX_PHASE_D        4
 361 #define ISDN_FAX_PHASE_E        5
 362
 363 #endif /* TTY_FAX */
 364
 365 #define ISDN_FAX_CLASS1_FAE     0
 366 #define ISDN_FAX_CLASS1_FTS     1
 367 #define ISDN_FAX_CLASS1_FRS     2
 368 #define ISDN_FAX_CLASS1_FTM     3
 369 #define ISDN_FAX_CLASS1_FRM     4
 370 #define ISDN_FAX_CLASS1_FTH     5
 371 #define ISDN_FAX_CLASS1_FRH     6
 372 #define ISDN_FAX_CLASS1_CTRL    7
 373
 374 #define ISDN_FAX_CLASS1_OK      0
 375 #define ISDN_FAX_CLASS1_CONNECT 1
 376 #define ISDN_FAX_CLASS1_NOCARR  2
 377 #define ISDN_FAX_CLASS1_ERROR   3
 378 #define ISDN_FAX_CLASS1_FCERROR 4
 379 #define ISDN_FAX_CLASS1_QUERY   5
 380
 381 typedef struct {
 382         __u8    cmd;
 383         __u8    subcmd;
 384         __u8    para[50];
 385 } aux_s;
 386
 387 #define AT_COMMAND      0
 388 #define AT_EQ_VALUE     1
 389 #define AT_QUERY        2
 390 #define AT_EQ_QUERY     3
 391
 392 /* CAPI structs */
 393
 394 /* this is compatible to the old union size */
 395 #define MAX_CAPI_PARA_LEN 50
 396
 397 typedef struct {
 398         /* Header */
 399         __u16 Length;
 400         __u16 ApplId;
 401         __u8 Command;
 402         __u8 Subcommand;
 403         __u16 Messagenumber;
 404
 405         /* Parameter */
 406         union {
 407                 __u32 Controller;
 408                 __u32 PLCI;
 409                 __u32 NCCI;
 410         } adr;
 411         __u8 para[MAX_CAPI_PARA_LEN];
 412 } capi_msg;
 413
 414 /*
 415  * Structure for exchanging above infos
 416  *
 417  */
 418 typedef struct {
 419         int   driver;           /* Lowlevel-Driver-ID            */
 420         int   command;          /* Command or Status (see above) */
 421         ulong arg;              /* Additional Data               */
 422         union {
 423                 ulong errcode;  /* Type of error with STAT_L1ERR        */
 424                 int length;     /* Amount of bytes sent with STAT_BSENT */
 425                 u_char num[50]; /* Additional Data                      */
 426                 setup_parm setup;/* For SETUP msg                       */
 427                 capi_msg cmsg;  /* For CAPI like messages               */
 428                 char display[85];/* display message data                */
 429                 isdn_cmd_stat isdn_io; /* ISDN IO-parameter/result      */
 430                 aux_s aux;      /* for modem commands/indications       */
 431 #ifdef CONFIG_ISDN_TTY_FAX
 432                 T30_s   *fax;   /* Pointer to ttys fax struct           */
 433 #endif
 434         } parm;
 435 } isdn_ctrl;
 436
 437 #define dss1_io    isdn_io
 438 #define ni1_io     isdn_io
 439
 440 /*
 441  * The interface-struct itself (initialized at load-time of lowlevel-driver)
 442  *
 443  * See Documentation/isdn/INTERFACE for a description, how the communication
 444  * between the ISDN subsystem and its drivers is done.
 445  *
 446  */
 447 typedef struct {
 448   /* Number of channels supported by this driver
 449    */
 450   int channels;
 451
 452   /*
 453    * Maximum Size of transmit/receive-buffer this driver supports.
 454    */
 455   int maxbufsize;
 456
 457   /* Feature-Flags for this driver.
 458    * See defines ISDN_FEATURE_... for Values
 459    */
 460   unsigned long features;
 461
 462   /*
 463    * Needed for calculating
 464    * dev->hard_header_len = linklayer header + hl_hdrlen;
 465    * Drivers, not supporting sk_buff's should set this to 0.
 466    */
 467   unsigned short hl_hdrlen;
 468
 469   /*
 470    * Receive-Callback using sk_buff's
 471    * Parameters:
 472    *             int                    Driver-ID
 473    *             int                    local channel-number (0 ...)
 474    *             struct sk_buff *skb    received Data
 475    */
 476   void (*rcvcallb_skb)(int, int, struct sk_buff *);
 477
 478   /* Status-Callback
 479    * Parameters:
 480    *             isdn_ctrl*
 481    *                   driver  = Driver ID.
 482    *                   command = One of above ISDN_STAT_... constants.
 483    *                   arg     = depending on status-type.
 484    *                   num     = depending on status-type.
 485    */
 486   int (*statcallb)(isdn_ctrl*);
 487
 488   /* Send command
 489    * Parameters:
 490    *             isdn_ctrl*
 491    *                   driver  = Driver ID.
 492    *                   command = One of above ISDN_CMD_... constants.
 493    *                   arg     = depending on command.
 494    *                   num     = depending on command.
 495    */
 496   int (*command)(isdn_ctrl*);
 497
 498   /*
 499    * Send data using sk_buff's
 500    * Parameters:
 501    *             int                    driverId
 502    *             int                    local channel-number (0...)
 503    *             int                    Flag: Need ACK for this packet.
 504    *             struct sk_buff *skb    Data to send
 505    */
 506   int (*writebuf_skb) (int, int, int, struct sk_buff *);
 507
 508   /* Send raw D-Channel-Commands
 509    * Parameters:
 510    *             u_char pointer data
 511    *             int    length of data
 512    *             int    Flag: 0 = Call form Kernel-Space (use memcpy,
 513    *                              no schedule allowed)
 514    *                          1 = Data is in User-Space (use memcpy_fromfs,
 515    *                              may schedule)
 516    *             int    driverId
 517    *             int    local channel-number (0 ...)
 518    */
 519   int (*writecmd)(const u_char*, int, int, int, int);
 520
 521   /* Read raw Status replies
 522    *             u_char pointer data (volatile)
 523    *             int    length of buffer
 524    *             int    Flag: 0 = Call form Kernel-Space (use memcpy,
 525    *                              no schedule allowed)
 526    *                          1 = Data is in User-Space (use memcpy_fromfs,
 527    *                              may schedule)
 528    *             int    driverId
 529    *             int    local channel-number (0 ...)
 530    */
 531   int (*readstat)(u_char*, int, int, int, int);
 532
 533   char id[20];
 534 } isdn_if;
 535
 536 /*
 537  * Function which must be called by lowlevel-driver at loadtime with
 538  * the following fields of above struct set:
 539  *
 540  * channels     Number of channels that will be supported.
 541  * hl_hdrlen    Space to preserve in sk_buff's when sending. Drivers, not
 542  *              supporting sk_buff's should set this to 0.
 543  * command      Address of Command-Handler.
 544  * features     Bitwise coded Features of this driver. (use ISDN_FEATURE_...)
 545  * writebuf_skb Address of Skbuff-Send-Handler.
 546  * writecmd        "    "  D-Channel  " which accepts raw D-Ch-Commands.
 547  * readstat        "    "  D-Channel  " which delivers raw Status-Data.
 548  *
 549  * The linklevel-driver fills the following fields:
 550  *
 551  * channels      Driver-ID assigned to this driver. (Must be used on all
 552  *               subsequent callbacks.
 553  * rcvcallb_skb  Address of handler for received Skbuff's.
 554  * statcallb        "    "     "    for status-changes.
 555  *
 556  */
 557 extern int register_isdn(isdn_if*);
 558 #include <asm/uaccess.h>
 559
 560 #endif /* __KERNEL__ */
 561 #endif /* isdnif_h */