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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
140typedef 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
267typedef 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
282typedef 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
370typedef 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
386typedef 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 */
407typedef 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 */
437typedef 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 */
541extern int register_isdn(isdn_if*);
542#include <asm/uaccess.h>
543
544#endif /* __KERNEL__ */
545
546#endif /* __ISDNIF_H__ */