1 /* $Id: isdnif.h,v 1.43.2.2 2004/01/12 23:08:35 keil Exp $ 2 * 3 * Linux ISDN subsystem 4 * Definition of the interface between the subsystem and its low-level drivers. 5 * 6 * Copyright 1994,95,96 by Fritz Elfert (fritz@isdn4linux.de) 7 * Copyright 1995,96 Thinking Objects Software GmbH Wuerzburg 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 14 #ifndef __ISDNIF_H__ 15 #define __ISDNIF_H__ 16 17 18 /* 19 * Values for general protocol-selection 20 */ 21 #define ISDN_PTYPE_UNKNOWN 0 /* Protocol undefined */ 22 #define ISDN_PTYPE_1TR6 1 /* german 1TR6-protocol */ 23 #define ISDN_PTYPE_EURO 2 /* EDSS1-protocol */ 24 #define ISDN_PTYPE_LEASED 3 /* for leased lines */ 25 #define ISDN_PTYPE_NI1 4 /* US NI-1 protocol */ 26 #define ISDN_PTYPE_MAX 7 /* Max. 8 Protocols */ 27 28 /* 29 * Values for Layer-2-protocol-selection 30 */ 31 #define ISDN_PROTO_L2_X75I 0 /* X75/LAPB with I-Frames */ 32 #define ISDN_PROTO_L2_X75UI 1 /* X75/LAPB with UI-Frames */ 33 #define ISDN_PROTO_L2_X75BUI 2 /* X75/LAPB with UI-Frames */ 34 #define ISDN_PROTO_L2_HDLC 3 /* HDLC */ 35 #define ISDN_PROTO_L2_TRANS 4 /* Transparent (Voice) */ 36 #define ISDN_PROTO_L2_X25DTE 5 /* X25/LAPB DTE mode */ 37 #define ISDN_PROTO_L2_X25DCE 6 /* X25/LAPB DCE mode */ 38 #define ISDN_PROTO_L2_V11096 7 /* V.110 bitrate adaption 9600 Baud */ 39 #define ISDN_PROTO_L2_V11019 8 /* V.110 bitrate adaption 19200 Baud */ 40 #define ISDN_PROTO_L2_V11038 9 /* V.110 bitrate adaption 38400 Baud */ 41 #define ISDN_PROTO_L2_MODEM 10 /* Analog Modem on Board */ 42 #define ISDN_PROTO_L2_FAX 11 /* Fax Group 2/3 */ 43 #define ISDN_PROTO_L2_HDLC_56K 12 /* HDLC 56k */ 44 #define ISDN_PROTO_L2_MAX 15 /* Max. 16 Protocols */ 45 46 /* 47 * Values for Layer-3-protocol-selection 48 */ 49 #define ISDN_PROTO_L3_TRANS 0 /* Transparent */ 50 #define ISDN_PROTO_L3_TRANSDSP 1 /* Transparent with DSP */ 51 #define ISDN_PROTO_L3_FCLASS2 2 /* Fax Group 2/3 CLASS 2 */ 52 #define ISDN_PROTO_L3_FCLASS1 3 /* Fax Group 2/3 CLASS 1 */ 53 #define ISDN_PROTO_L3_MAX 7 /* Max. 8 Protocols */ 54 55 #ifdef __KERNEL__ 56 57 #include <linux/skbuff.h> 58 59 /***************************************************************************/ 60 /* Extensions made by Werner Cornelius (werner@ikt.de) */ 61 /* */ 62 /* The proceed command holds a incoming call in a state to leave processes */ 63 /* enough time to check whether ist should be accepted. */ 64 /* The PROT_IO Command extends the interface to make protocol dependent */ 65 /* features available (call diversion, call waiting...). */ 66 /* */ 67 /* The PROT_IO Command is executed with the desired driver id and the arg */ 68 /* parameter coded as follows: */ 69 /* The lower 8 bits of arg contain the desired protocol from ISDN_PTYPE */ 70 /* definitions. The upper 24 bits represent the protocol specific cmd/stat.*/ 71 /* Any additional data is protocol and command specific. */ 72 /* This mechanism also applies to the statcallb callback STAT_PROT. */ 73 /* */ 74 /* This suggested extension permits an easy expansion of protocol specific */ 75 /* handling. Extensions may be added at any time without changing the HL */ 76 /* driver code and not getting conflicts without certifications. */ 77 /* The well known CAPI 2.0 interface handles such extensions in a similar */ 78 /* way. Perhaps a protocol specific module may be added and separately */ 79 /* loaded and linked to the basic isdn module for handling. */ 80 /***************************************************************************/ 81 82 /*****************/ 83 /* DSS1 commands */ 84 /*****************/ 85 #define DSS1_CMD_INVOKE ((0x00 << 8) | ISDN_PTYPE_EURO) /* invoke a supplementary service */ 86 #define DSS1_CMD_INVOKE_ABORT ((0x01 << 8) | ISDN_PTYPE_EURO) /* abort a invoke cmd */ 87 88 /*******************************/ 89 /* DSS1 Status callback values */ 90 /*******************************/ 91 #define DSS1_STAT_INVOKE_RES ((0x80 << 8) | ISDN_PTYPE_EURO) /* Result for invocation */ 92 #define DSS1_STAT_INVOKE_ERR ((0x81 << 8) | ISDN_PTYPE_EURO) /* Error Return for invocation */ 93 #define DSS1_STAT_INVOKE_BRD ((0x82 << 8) | ISDN_PTYPE_EURO) /* Deliver invoke broadcast info */ 94 95 96 /*********************************************************************/ 97 /* structures for DSS1 commands and callback */ 98 /* */ 99 /* An action is invoked by sending a DSS1_CMD_INVOKE. The ll_id, proc*/ 100 /* timeout, datalen and data fields must be set before calling. */ 101 /* */ 102 /* The return value is a positive hl_id value also delivered in the */ 103 /* hl_id field. A value of zero signals no more left hl_id capacitys.*/ 104 /* A negative return value signals errors in LL. So if the return */ 105 /* value is <= 0 no action in LL will be taken -> request ignored */ 106 /* */ 107 /* The timeout field must be filled with a positive value specifying */ 108 /* the amount of time the INVOKED process waits for a reaction from */ 109 /* the network. */ 110 /* If a response (either error or result) is received during this */ 111 /* intervall, a reporting callback is initiated and the process will */ 112 /* be deleted, the hl identifier will be freed. */ 113 /* If no response is received during the specified intervall, a error*/ 114 /* callback is initiated with timeout set to -1 and a datalen set */ 115 /* to 0. */ 116 /* If timeout is set to a value <= 0 during INVOCATION the process is*/ 117 /* immediately deleted after sending the data. No callback occurs ! */ 118 /* */ 119 /* A currently waiting process may be aborted with INVOKE_ABORT. No */ 120 /* callback will occur when a process has been aborted. */ 121 /* */ 122 /* Broadcast invoke frames from the network are reported via the */ 123 /* STAT_INVOKE_BRD callback. The ll_id is set to 0, the other fields */ 124 /* are supplied by the network and not by the HL. */ 125 /*********************************************************************/ 126 127 /*****************/ 128 /* NI1 commands */ 129 /*****************/ 130 #define NI1_CMD_INVOKE ((0x00 << 8) | ISDN_PTYPE_NI1) /* invoke a supplementary service */ 131 #define NI1_CMD_INVOKE_ABORT ((0x01 << 8) | ISDN_PTYPE_NI1) /* abort a invoke cmd */ 132 133 /*******************************/ 134 /* NI1 Status callback values */ 135 /*******************************/ 136 #define NI1_STAT_INVOKE_RES ((0x80 << 8) | ISDN_PTYPE_NI1) /* Result for invocation */ 137 #define NI1_STAT_INVOKE_ERR ((0x81 << 8) | ISDN_PTYPE_NI1) /* Error Return for invocation */ 138 #define NI1_STAT_INVOKE_BRD ((0x82 << 8) | ISDN_PTYPE_NI1) /* Deliver invoke broadcast info */ 139 140 typedef struct 141 { ulong ll_id; /* ID supplied by LL when executing */ 142 /* a command and returned by HL for */ 143 /* INVOKE_RES and INVOKE_ERR */ 144 int hl_id; /* ID supplied by HL when called */ 145 /* for executing a cmd and delivered */ 146 /* for results and errors */ 147 /* must be supplied by LL when aborting*/ 148 int proc; /* invoke procedure used by CMD_INVOKE */ 149 /* returned by callback and broadcast */ 150 int timeout; /* timeout for INVOKE CMD in ms */ 151 /* -1 in stat callback when timed out */ 152 /* error value when error callback */ 153 int datalen; /* length of cmd or stat data */ 154 u_char *data;/* pointer to data delivered or send */ 155 } isdn_cmd_stat; 156 157 /* 158 * Commands from linklevel to lowlevel 159 * 160 */ 161 #define ISDN_CMD_IOCTL 0 /* Perform ioctl */ 162 #define ISDN_CMD_DIAL 1 /* Dial out */ 163 #define ISDN_CMD_ACCEPTD 2 /* Accept an incoming call on D-Chan. */ 164 #define ISDN_CMD_ACCEPTB 3 /* Request B-Channel connect. */ 165 #define ISDN_CMD_HANGUP 4 /* Hangup */ 166 #define ISDN_CMD_CLREAZ 5 /* Clear EAZ(s) of channel */ 167 #define ISDN_CMD_SETEAZ 6 /* Set EAZ(s) of channel */ 168 #define ISDN_CMD_GETEAZ 7 /* Get EAZ(s) of channel */ 169 #define ISDN_CMD_SETSIL 8 /* Set Service-Indicator-List of channel */ 170 #define ISDN_CMD_GETSIL 9 /* Get Service-Indicator-List of channel */ 171 #define ISDN_CMD_SETL2 10 /* Set B-Chan. Layer2-Parameter */ 172 #define ISDN_CMD_GETL2 11 /* Get B-Chan. Layer2-Parameter */ 173 #define ISDN_CMD_SETL3 12 /* Set B-Chan. Layer3-Parameter */ 174 #define ISDN_CMD_GETL3 13 /* Get B-Chan. Layer3-Parameter */ 175 // #define ISDN_CMD_LOCK 14 /* Signal usage by upper levels */ 176 // #define ISDN_CMD_UNLOCK 15 /* Release usage-lock */ 177 #define ISDN_CMD_SUSPEND 16 /* Suspend connection */ 178 #define ISDN_CMD_RESUME 17 /* Resume connection */ 179 #define ISDN_CMD_PROCEED 18 /* Proceed with call establishment */ 180 #define ISDN_CMD_ALERT 19 /* Alert after Proceeding */ 181 #define ISDN_CMD_REDIR 20 /* Redir a incoming call */ 182 #define ISDN_CMD_PROT_IO 21 /* Protocol specific commands */ 183 #define CAPI_PUT_MESSAGE 22 /* CAPI message send down or up */ 184 #define ISDN_CMD_FAXCMD 23 /* FAX commands to HL-driver */ 185 #define ISDN_CMD_AUDIO 24 /* DSP, DTMF, ... settings */ 186 187 /* 188 * Status-Values delivered from lowlevel to linklevel via 189 * statcallb(). 190 * 191 */ 192 #define ISDN_STAT_STAVAIL 256 /* Raw status-data available */ 193 #define ISDN_STAT_ICALL 257 /* Incoming call detected */ 194 #define ISDN_STAT_RUN 258 /* Signal protocol-code is running */ 195 #define ISDN_STAT_STOP 259 /* Signal halt of protocol-code */ 196 #define ISDN_STAT_DCONN 260 /* Signal D-Channel connect */ 197 #define ISDN_STAT_BCONN 261 /* Signal B-Channel connect */ 198 #define ISDN_STAT_DHUP 262 /* Signal D-Channel disconnect */ 199 #define ISDN_STAT_BHUP 263 /* Signal B-Channel disconnect */ 200 #define ISDN_STAT_CINF 264 /* Charge-Info */ 201 #define ISDN_STAT_LOAD 265 /* Signal new lowlevel-driver is loaded */ 202 #define ISDN_STAT_UNLOAD 266 /* Signal unload of lowlevel-driver */ 203 #define ISDN_STAT_BSENT 267 /* Signal packet sent */ 204 #define ISDN_STAT_NODCH 268 /* Signal no D-Channel */ 205 #define ISDN_STAT_ADDCH 269 /* Add more Channels */ 206 #define ISDN_STAT_CAUSE 270 /* Cause-Message */ 207 #define ISDN_STAT_ICALLW 271 /* Incoming call without B-chan waiting */ 208 #define ISDN_STAT_REDIR 272 /* Redir result */ 209 #define ISDN_STAT_PROT 273 /* protocol IO specific callback */ 210 #define ISDN_STAT_DISPLAY 274 /* deliver a received display message */ 211 #define ISDN_STAT_L1ERR 275 /* Signal Layer-1 Error */ 212 #define ISDN_STAT_FAXIND 276 /* FAX indications from HL-driver */ 213 #define ISDN_STAT_AUDIO 277 /* DTMF, DSP indications */ 214 #define ISDN_STAT_DISCH 278 /* Disable/Enable channel usage */ 215 216 /* 217 * Audio commands 218 */ 219 #define ISDN_AUDIO_SETDD 0 /* Set DTMF detection */ 220 #define ISDN_AUDIO_DTMF 1 /* Rx/Tx DTMF */ 221 222 /* 223 * Values for errcode field 224 */ 225 #define ISDN_STAT_L1ERR_SEND 1 226 #define ISDN_STAT_L1ERR_RECV 2 227 228 /* 229 * Values for feature-field of interface-struct. 230 */ 231 /* Layer 2 */ 232 #define ISDN_FEATURE_L2_X75I (0x0001 << ISDN_PROTO_L2_X75I) 233 #define ISDN_FEATURE_L2_X75UI (0x0001 << ISDN_PROTO_L2_X75UI) 234 #define ISDN_FEATURE_L2_X75BUI (0x0001 << ISDN_PROTO_L2_X75BUI) 235 #define ISDN_FEATURE_L2_HDLC (0x0001 << ISDN_PROTO_L2_HDLC) 236 #define ISDN_FEATURE_L2_TRANS (0x0001 << ISDN_PROTO_L2_TRANS) 237 #define ISDN_FEATURE_L2_X25DTE (0x0001 << ISDN_PROTO_L2_X25DTE) 238 #define ISDN_FEATURE_L2_X25DCE (0x0001 << ISDN_PROTO_L2_X25DCE) 239 #define ISDN_FEATURE_L2_V11096 (0x0001 << ISDN_PROTO_L2_V11096) 240 #define ISDN_FEATURE_L2_V11019 (0x0001 << ISDN_PROTO_L2_V11019) 241 #define ISDN_FEATURE_L2_V11038 (0x0001 << ISDN_PROTO_L2_V11038) 242 #define ISDN_FEATURE_L2_MODEM (0x0001 << ISDN_PROTO_L2_MODEM) 243 #define ISDN_FEATURE_L2_FAX (0x0001 << ISDN_PROTO_L2_FAX) 244 #define ISDN_FEATURE_L2_HDLC_56K (0x0001 << ISDN_PROTO_L2_HDLC_56K) 245 246 #define ISDN_FEATURE_L2_MASK (0x0FFFF) /* Max. 16 protocols */ 247 #define ISDN_FEATURE_L2_SHIFT (0) 248 249 /* Layer 3 */ 250 #define ISDN_FEATURE_L3_TRANS (0x10000 << ISDN_PROTO_L3_TRANS) 251 #define ISDN_FEATURE_L3_TRANSDSP (0x10000 << ISDN_PROTO_L3_TRANSDSP) 252 #define ISDN_FEATURE_L3_FCLASS2 (0x10000 << ISDN_PROTO_L3_FCLASS2) 253 #define ISDN_FEATURE_L3_FCLASS1 (0x10000 << ISDN_PROTO_L3_FCLASS1) 254 255 #define ISDN_FEATURE_L3_MASK (0x0FF0000) /* Max. 8 Protocols */ 256 #define ISDN_FEATURE_L3_SHIFT (16) 257 258 /* Signaling */ 259 #define ISDN_FEATURE_P_UNKNOWN (0x1000000 << ISDN_PTYPE_UNKNOWN) 260 #define ISDN_FEATURE_P_1TR6 (0x1000000 << ISDN_PTYPE_1TR6) 261 #define ISDN_FEATURE_P_EURO (0x1000000 << ISDN_PTYPE_EURO) 262 #define ISDN_FEATURE_P_NI1 (0x1000000 << ISDN_PTYPE_NI1) 263 264 #define ISDN_FEATURE_P_MASK (0x0FF000000) /* Max. 8 Protocols */ 265 #define ISDN_FEATURE_P_SHIFT (24) 266 267 typedef struct setup_parm { 268 unsigned char phone[32]; /* Remote Phone-Number */ 269 unsigned char eazmsn[32]; /* Local EAZ or MSN */ 270 unsigned char si1; /* Service Indicator 1 */ 271 unsigned char si2; /* Service Indicator 2 */ 272 unsigned char plan; /* Numbering plan */ 273 unsigned char screen; /* Screening info */ 274 } setup_parm; 275 276 277 #ifdef CONFIG_ISDN_TTY_FAX 278 /* T.30 Fax G3 */ 279 280 #define FAXIDLEN 21 281 282 typedef struct T30_s { 283 /* session parameters */ 284 __u8 resolution; 285 __u8 rate; 286 __u8 width; 287 __u8 length; 288 __u8 compression; 289 __u8 ecm; 290 __u8 binary; 291 __u8 scantime; 292 __u8 id[FAXIDLEN]; 293 /* additional parameters */ 294 __u8 phase; 295 __u8 direction; 296 __u8 code; 297 __u8 badlin; 298 __u8 badmul; 299 __u8 bor; 300 __u8 fet; 301 __u8 pollid[FAXIDLEN]; 302 __u8 cq; 303 __u8 cr; 304 __u8 ctcrty; 305 __u8 minsp; 306 __u8 phcto; 307 __u8 rel; 308 __u8 nbc; 309 /* remote station parameters */ 310 __u8 r_resolution; 311 __u8 r_rate; 312 __u8 r_width; 313 __u8 r_length; 314 __u8 r_compression; 315 __u8 r_ecm; 316 __u8 r_binary; 317 __u8 r_scantime; 318 __u8 r_id[FAXIDLEN]; 319 __u8 r_code; 320 } __packed T30_s; 321 322 #define ISDN_TTY_FAX_CONN_IN 0 323 #define ISDN_TTY_FAX_CONN_OUT 1 324 325 #define ISDN_TTY_FAX_FCON 0 326 #define ISDN_TTY_FAX_DIS 1 327 #define ISDN_TTY_FAX_FTT 2 328 #define ISDN_TTY_FAX_MCF 3 329 #define ISDN_TTY_FAX_DCS 4 330 #define ISDN_TTY_FAX_TRAIN_OK 5 331 #define ISDN_TTY_FAX_EOP 6 332 #define ISDN_TTY_FAX_EOM 7 333 #define ISDN_TTY_FAX_MPS 8 334 #define ISDN_TTY_FAX_DTC 9 335 #define ISDN_TTY_FAX_RID 10 336 #define ISDN_TTY_FAX_HNG 11 337 #define ISDN_TTY_FAX_DT 12 338 #define ISDN_TTY_FAX_FCON_I 13 339 #define ISDN_TTY_FAX_DR 14 340 #define ISDN_TTY_FAX_ET 15 341 #define ISDN_TTY_FAX_CFR 16 342 #define ISDN_TTY_FAX_PTS 17 343 #define ISDN_TTY_FAX_SENT 18 344 345 #define ISDN_FAX_PHASE_IDLE 0 346 #define ISDN_FAX_PHASE_A 1 347 #define ISDN_FAX_PHASE_B 2 348 #define ISDN_FAX_PHASE_C 3 349 #define ISDN_FAX_PHASE_D 4 350 #define ISDN_FAX_PHASE_E 5 351 352 #endif /* TTY_FAX */ 353 354 #define ISDN_FAX_CLASS1_FAE 0 355 #define ISDN_FAX_CLASS1_FTS 1 356 #define ISDN_FAX_CLASS1_FRS 2 357 #define ISDN_FAX_CLASS1_FTM 3 358 #define ISDN_FAX_CLASS1_FRM 4 359 #define ISDN_FAX_CLASS1_FTH 5 360 #define ISDN_FAX_CLASS1_FRH 6 361 #define ISDN_FAX_CLASS1_CTRL 7 362 363 #define ISDN_FAX_CLASS1_OK 0 364 #define ISDN_FAX_CLASS1_CONNECT 1 365 #define ISDN_FAX_CLASS1_NOCARR 2 366 #define ISDN_FAX_CLASS1_ERROR 3 367 #define ISDN_FAX_CLASS1_FCERROR 4 368 #define ISDN_FAX_CLASS1_QUERY 5 369 370 typedef struct { 371 __u8 cmd; 372 __u8 subcmd; 373 __u8 para[50]; 374 } aux_s; 375 376 #define AT_COMMAND 0 377 #define AT_EQ_VALUE 1 378 #define AT_QUERY 2 379 #define AT_EQ_QUERY 3 380 381 /* CAPI structs */ 382 383 /* this is compatible to the old union size */ 384 #define MAX_CAPI_PARA_LEN 50 385 386 typedef struct { 387 /* Header */ 388 __u16 Length; 389 __u16 ApplId; 390 __u8 Command; 391 __u8 Subcommand; 392 __u16 Messagenumber; 393 394 /* Parameter */ 395 union { 396 __u32 Controller; 397 __u32 PLCI; 398 __u32 NCCI; 399 } adr; 400 __u8 para[MAX_CAPI_PARA_LEN]; 401 } capi_msg; 402 403 /* 404 * Structure for exchanging above infos 405 * 406 */ 407 typedef struct { 408 int driver; /* Lowlevel-Driver-ID */ 409 int command; /* Command or Status (see above) */ 410 ulong arg; /* Additional Data */ 411 union { 412 ulong errcode; /* Type of error with STAT_L1ERR */ 413 int length; /* Amount of bytes sent with STAT_BSENT */ 414 u_char num[50]; /* Additional Data */ 415 setup_parm setup;/* For SETUP msg */ 416 capi_msg cmsg; /* For CAPI like messages */ 417 char display[85];/* display message data */ 418 isdn_cmd_stat isdn_io; /* ISDN IO-parameter/result */ 419 aux_s aux; /* for modem commands/indications */ 420 #ifdef CONFIG_ISDN_TTY_FAX 421 T30_s *fax; /* Pointer to ttys fax struct */ 422 #endif 423 ulong userdata; /* User Data */ 424 } parm; 425 } isdn_ctrl; 426 427 #define dss1_io isdn_io 428 #define ni1_io isdn_io 429 430 /* 431 * The interface-struct itself (initialized at load-time of lowlevel-driver) 432 * 433 * See Documentation/isdn/INTERFACE for a description, how the communication 434 * between the ISDN subsystem and its drivers is done. 435 * 436 */ 437 typedef struct { 438 struct module *owner; 439 440 /* Number of channels supported by this driver 441 */ 442 int channels; 443 444 /* 445 * Maximum Size of transmit/receive-buffer this driver supports. 446 */ 447 int maxbufsize; 448 449 /* Feature-Flags for this driver. 450 * See defines ISDN_FEATURE_... for Values 451 */ 452 unsigned long features; 453 454 /* 455 * Needed for calculating 456 * dev->hard_header_len = linklayer header + hl_hdrlen; 457 * Drivers, not supporting sk_buff's should set this to 0. 458 */ 459 unsigned short hl_hdrlen; 460 461 /* 462 * Receive-Callback using sk_buff's 463 * Parameters: 464 * int Driver-ID 465 * int local channel-number (0 ...) 466 * struct sk_buff *skb received Data 467 */ 468 void (*rcvcallb_skb)(int, int, struct sk_buff *); 469 470 /* Status-Callback 471 * Parameters: 472 * isdn_ctrl* 473 * driver = Driver ID. 474 * command = One of above ISDN_STAT_... constants. 475 * arg = depending on status-type. 476 * num = depending on status-type. 477 */ 478 int (*statcallb)(isdn_ctrl*); 479 480 /* Send command 481 * Parameters: 482 * isdn_ctrl* 483 * driver = Driver ID. 484 * command = One of above ISDN_CMD_... constants. 485 * arg = depending on command. 486 * num = depending on command. 487 */ 488 int (*command)(isdn_ctrl*); 489 490 /* 491 * Send data using sk_buff's 492 * Parameters: 493 * int driverId 494 * int local channel-number (0...) 495 * int Flag: Need ACK for this packet. 496 * struct sk_buff *skb Data to send 497 */ 498 int (*writebuf_skb) (int, int, int, struct sk_buff *); 499 500 /* Send raw D-Channel-Commands 501 * Parameters: 502 * u_char pointer data 503 * int length of data 504 * int driverId 505 * int local channel-number (0 ...) 506 */ 507 int (*writecmd)(const u_char __user *, int, int, int); 508 509 /* Read raw Status replies 510 * u_char pointer data (volatile) 511 * int length of buffer 512 * int driverId 513 * int local channel-number (0 ...) 514 */ 515 int (*readstat)(u_char __user *, int, int, int); 516 517 char id[20]; 518 } isdn_if; 519 520 /* 521 * Function which must be called by lowlevel-driver at loadtime with 522 * the following fields of above struct set: 523 * 524 * channels Number of channels that will be supported. 525 * hl_hdrlen Space to preserve in sk_buff's when sending. Drivers, not 526 * supporting sk_buff's should set this to 0. 527 * command Address of Command-Handler. 528 * features Bitwise coded Features of this driver. (use ISDN_FEATURE_...) 529 * writebuf_skb Address of Skbuff-Send-Handler. 530 * writecmd " " D-Channel " which accepts raw D-Ch-Commands. 531 * readstat " " D-Channel " which delivers raw Status-Data. 532 * 533 * The linklevel-driver fills the following fields: 534 * 535 * channels Driver-ID assigned to this driver. (Must be used on all 536 * subsequent callbacks. 537 * rcvcallb_skb Address of handler for received Skbuff's. 538 * statcallb " " " for status-changes. 539 * 540 */ 541 extern int register_isdn(isdn_if*); 542 #include <asm/uaccess.h> 543 544 #endif /* __KERNEL__ */ 545 546 #endif /* __ISDNIF_H__ */ 547