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Viewing changes to drivers/isdn/gigaset/i4l.c

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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drivers/isdn/gigaset/i4l.c
 
1
/*
 
2
 * Stuff used by all variants of the driver
 
3
 *
 
4
 * Copyright (c) 2001 by Stefan Eilers,
 
5
 *                       Hansjoerg Lipp <hjlipp@web.de>,
 
6
 *                       Tilman Schmidt <tilman@imap.cc>.
 
7
 *
 
8
 * =====================================================================
 
9
 *      This program is free software; you can redistribute it and/or
 
10
 *      modify it under the terms of the GNU General Public License as
 
11
 *      published by the Free Software Foundation; either version 2 of
 
12
 *      the License, or (at your option) any later version.
 
13
 * =====================================================================
 
14
 */
 
15
 
 
16
#include "gigaset.h"
 
17
#include <linux/isdnif.h>
 
18
#include <linux/export.h>
 
19
 
 
20
#define SBUFSIZE        4096    /* sk_buff payload size */
 
21
#define TRANSBUFSIZE    768     /* bytes per skb for transparent receive */
 
22
#define HW_HDR_LEN      2       /* Header size used to store ack info */
 
23
#define MAX_BUF_SIZE    (SBUFSIZE - HW_HDR_LEN) /* max data packet from LL */
 
24
 
 
25
/* == Handling of I4L IO =====================================================*/
 
26
 
 
27
/* writebuf_from_LL
 
28
 * called by LL to transmit data on an open channel
 
29
 * inserts the buffer data into the send queue and starts the transmission
 
30
 * Note that this operation must not sleep!
 
31
 * When the buffer is processed completely, gigaset_skb_sent() should be called.
 
32
 * parameters:
 
33
 *      driverID        driver ID as assigned by LL
 
34
 *      channel         channel number
 
35
 *      ack             if != 0 LL wants to be notified on completion via
 
36
 *                      statcallb(ISDN_STAT_BSENT)
 
37
 *      skb             skb containing data to send
 
38
 * return value:
 
39
 *      number of accepted bytes
 
40
 *      0 if temporarily unable to accept data (out of buffer space)
 
41
 *      <0 on error (eg. -EINVAL)
 
42
 */
 
43
static int writebuf_from_LL(int driverID, int channel, int ack,
 
44
                            struct sk_buff *skb)
 
45
{
 
46
        struct cardstate *cs = gigaset_get_cs_by_id(driverID);
 
47
        struct bc_state *bcs;
 
48
        unsigned char *ack_header;
 
49
        unsigned len;
 
50
 
 
51
        if (!cs) {
 
52
                pr_err("%s: invalid driver ID (%d)\n", __func__, driverID);
 
53
                return -ENODEV;
 
54
        }
 
55
        if (channel < 0 || channel >= cs->channels) {
 
56
                dev_err(cs->dev, "%s: invalid channel ID (%d)\n",
 
57
                        __func__, channel);
 
58
                return -ENODEV;
 
59
        }
 
60
        bcs = &cs->bcs[channel];
 
61
 
 
62
        /* can only handle linear sk_buffs */
 
63
        if (skb_linearize(skb) < 0) {
 
64
                dev_err(cs->dev, "%s: skb_linearize failed\n", __func__);
 
65
                return -ENOMEM;
 
66
        }
 
67
        len = skb->len;
 
68
 
 
69
        gig_dbg(DEBUG_LLDATA,
 
70
                "Receiving data from LL (id: %d, ch: %d, ack: %d, sz: %d)",
 
71
                driverID, channel, ack, len);
 
72
 
 
73
        if (!len) {
 
74
                if (ack)
 
75
                        dev_notice(cs->dev, "%s: not ACKing empty packet\n",
 
76
                                   __func__);
 
77
                return 0;
 
78
        }
 
79
        if (len > MAX_BUF_SIZE) {
 
80
                dev_err(cs->dev, "%s: packet too large (%d bytes)\n",
 
81
                        __func__, len);
 
82
                return -EINVAL;
 
83
        }
 
84
 
 
85
        /* set up acknowledgement header */
 
86
        if (skb_headroom(skb) < HW_HDR_LEN) {
 
87
                /* should never happen */
 
88
                dev_err(cs->dev, "%s: insufficient skb headroom\n", __func__);
 
89
                return -ENOMEM;
 
90
        }
 
91
        skb_set_mac_header(skb, -HW_HDR_LEN);
 
92
        skb->mac_len = HW_HDR_LEN;
 
93
        ack_header = skb_mac_header(skb);
 
94
        if (ack) {
 
95
                ack_header[0] = len & 0xff;
 
96
                ack_header[1] = len >> 8;
 
97
        } else {
 
98
                ack_header[0] = ack_header[1] = 0;
 
99
        }
 
100
        gig_dbg(DEBUG_MCMD, "skb: len=%u, ack=%d: %02x %02x",
 
101
                len, ack, ack_header[0], ack_header[1]);
 
102
 
 
103
        /* pass to device-specific module */
 
104
        return cs->ops->send_skb(bcs, skb);
 
105
}
 
106
 
 
107
/**
 
108
 * gigaset_skb_sent() - acknowledge sending an skb
 
109
 * @bcs:        B channel descriptor structure.
 
110
 * @skb:        sent data.
 
111
 *
 
112
 * Called by hardware module {bas,ser,usb}_gigaset when the data in a
 
113
 * skb has been successfully sent, for signalling completion to the LL.
 
114
 */
 
115
void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb)
 
116
{
 
117
        isdn_if *iif = bcs->cs->iif;
 
118
        unsigned char *ack_header = skb_mac_header(skb);
 
119
        unsigned len;
 
120
        isdn_ctrl response;
 
121
 
 
122
        ++bcs->trans_up;
 
123
 
 
124
        if (skb->len)
 
125
                dev_warn(bcs->cs->dev, "%s: skb->len==%d\n",
 
126
                         __func__, skb->len);
 
127
 
 
128
        len = ack_header[0] + ((unsigned) ack_header[1] << 8);
 
129
        if (len) {
 
130
                gig_dbg(DEBUG_MCMD, "ACKing to LL (id: %d, ch: %d, sz: %u)",
 
131
                        bcs->cs->myid, bcs->channel, len);
 
132
 
 
133
                response.driver = bcs->cs->myid;
 
134
                response.command = ISDN_STAT_BSENT;
 
135
                response.arg = bcs->channel;
 
136
                response.parm.length = len;
 
137
                iif->statcallb(&response);
 
138
        }
 
139
}
 
140
EXPORT_SYMBOL_GPL(gigaset_skb_sent);
 
141
 
 
142
/**
 
143
 * gigaset_skb_rcvd() - pass received skb to LL
 
144
 * @bcs:        B channel descriptor structure.
 
145
 * @skb:        received data.
 
146
 *
 
147
 * Called by hardware module {bas,ser,usb}_gigaset when user data has
 
148
 * been successfully received, for passing to the LL.
 
149
 * Warning: skb must not be accessed anymore!
 
150
 */
 
151
void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
 
152
{
 
153
        isdn_if *iif = bcs->cs->iif;
 
154
 
 
155
        iif->rcvcallb_skb(bcs->cs->myid, bcs->channel, skb);
 
156
        bcs->trans_down++;
 
157
}
 
158
EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
 
159
 
 
160
/**
 
161
 * gigaset_isdn_rcv_err() - signal receive error
 
162
 * @bcs:        B channel descriptor structure.
 
163
 *
 
164
 * Called by hardware module {bas,ser,usb}_gigaset when a receive error
 
165
 * has occurred, for signalling to the LL.
 
166
 */
 
167
void gigaset_isdn_rcv_err(struct bc_state *bcs)
 
168
{
 
169
        isdn_if *iif = bcs->cs->iif;
 
170
        isdn_ctrl response;
 
171
 
 
172
        /* if currently ignoring packets, just count down */
 
173
        if (bcs->ignore) {
 
174
                bcs->ignore--;
 
175
                return;
 
176
        }
 
177
 
 
178
        /* update statistics */
 
179
        bcs->corrupted++;
 
180
 
 
181
        /* error -> LL */
 
182
        gig_dbg(DEBUG_CMD, "sending L1ERR");
 
183
        response.driver = bcs->cs->myid;
 
184
        response.command = ISDN_STAT_L1ERR;
 
185
        response.arg = bcs->channel;
 
186
        response.parm.errcode = ISDN_STAT_L1ERR_RECV;
 
187
        iif->statcallb(&response);
 
188
}
 
189
EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
 
190
 
 
191
/* This function will be called by LL to send commands
 
192
 * NOTE: LL ignores the returned value, for commands other than ISDN_CMD_IOCTL,
 
193
 * so don't put too much effort into it.
 
194
 */
 
195
static int command_from_LL(isdn_ctrl *cntrl)
 
196
{
 
197
        struct cardstate *cs;
 
198
        struct bc_state *bcs;
 
199
        int retval = 0;
 
200
        char **commands;
 
201
        int ch;
 
202
        int i;
 
203
        size_t l;
 
204
 
 
205
        gig_dbg(DEBUG_CMD, "driver: %d, command: %d, arg: 0x%lx",
 
206
                cntrl->driver, cntrl->command, cntrl->arg);
 
207
 
 
208
        cs = gigaset_get_cs_by_id(cntrl->driver);
 
209
        if (cs == NULL) {
 
210
                pr_err("%s: invalid driver ID (%d)\n", __func__, cntrl->driver);
 
211
                return -ENODEV;
 
212
        }
 
213
        ch = cntrl->arg & 0xff;
 
214
 
 
215
        switch (cntrl->command) {
 
216
        case ISDN_CMD_IOCTL:
 
217
                dev_warn(cs->dev, "ISDN_CMD_IOCTL not supported\n");
 
218
                return -EINVAL;
 
219
 
 
220
        case ISDN_CMD_DIAL:
 
221
                gig_dbg(DEBUG_CMD,
 
222
                        "ISDN_CMD_DIAL (phone: %s, msn: %s, si1: %d, si2: %d)",
 
223
                        cntrl->parm.setup.phone, cntrl->parm.setup.eazmsn,
 
224
                        cntrl->parm.setup.si1, cntrl->parm.setup.si2);
 
225
 
 
226
                if (ch >= cs->channels) {
 
227
                        dev_err(cs->dev,
 
228
                                "ISDN_CMD_DIAL: invalid channel (%d)\n", ch);
 
229
                        return -EINVAL;
 
230
                }
 
231
                bcs = cs->bcs + ch;
 
232
                if (!gigaset_get_channel(bcs)) {
 
233
                        dev_err(cs->dev, "ISDN_CMD_DIAL: channel not free\n");
 
234
                        return -EBUSY;
 
235
                }
 
236
                switch (bcs->proto2) {
 
237
                case L2_HDLC:
 
238
                        bcs->rx_bufsize = SBUFSIZE;
 
239
                        break;
 
240
                default:                        /* assume transparent */
 
241
                        bcs->rx_bufsize = TRANSBUFSIZE;
 
242
                }
 
243
                dev_kfree_skb(bcs->rx_skb);
 
244
                gigaset_new_rx_skb(bcs);
 
245
 
 
246
                commands = kzalloc(AT_NUM*(sizeof *commands), GFP_ATOMIC);
 
247
                if (!commands) {
 
248
                        gigaset_free_channel(bcs);
 
249
                        dev_err(cs->dev, "ISDN_CMD_DIAL: out of memory\n");
 
250
                        return -ENOMEM;
 
251
                }
 
252
 
 
253
                l = 3 + strlen(cntrl->parm.setup.phone);
 
254
                commands[AT_DIAL] = kmalloc(l, GFP_ATOMIC);
 
255
                if (!commands[AT_DIAL])
 
256
                        goto oom;
 
257
                if (cntrl->parm.setup.phone[0] == '*' &&
 
258
                    cntrl->parm.setup.phone[1] == '*') {
 
259
                        /* internal call: translate ** prefix to CTP value */
 
260
                        commands[AT_TYPE] = kstrdup("^SCTP=0\r", GFP_ATOMIC);
 
261
                        if (!commands[AT_TYPE])
 
262
                                goto oom;
 
263
                        snprintf(commands[AT_DIAL], l,
 
264
                                 "D%s\r", cntrl->parm.setup.phone+2);
 
265
                } else {
 
266
                        commands[AT_TYPE] = kstrdup("^SCTP=1\r", GFP_ATOMIC);
 
267
                        if (!commands[AT_TYPE])
 
268
                                goto oom;
 
269
                        snprintf(commands[AT_DIAL], l,
 
270
                                 "D%s\r", cntrl->parm.setup.phone);
 
271
                }
 
272
 
 
273
                l = strlen(cntrl->parm.setup.eazmsn);
 
274
                if (l) {
 
275
                        l += 8;
 
276
                        commands[AT_MSN] = kmalloc(l, GFP_ATOMIC);
 
277
                        if (!commands[AT_MSN])
 
278
                                goto oom;
 
279
                        snprintf(commands[AT_MSN], l, "^SMSN=%s\r",
 
280
                                 cntrl->parm.setup.eazmsn);
 
281
                }
 
282
 
 
283
                switch (cntrl->parm.setup.si1) {
 
284
                case 1:         /* audio */
 
285
                        /* BC = 9090A3: 3.1 kHz audio, A-law */
 
286
                        commands[AT_BC] = kstrdup("^SBC=9090A3\r", GFP_ATOMIC);
 
287
                        if (!commands[AT_BC])
 
288
                                goto oom;
 
289
                        break;
 
290
                case 7:         /* data */
 
291
                default:        /* hope the app knows what it is doing */
 
292
                        /* BC = 8890: unrestricted digital information */
 
293
                        commands[AT_BC] = kstrdup("^SBC=8890\r", GFP_ATOMIC);
 
294
                        if (!commands[AT_BC])
 
295
                                goto oom;
 
296
                }
 
297
                /* ToDo: other si1 values, inspect si2, set HLC/LLC */
 
298
 
 
299
                commands[AT_PROTO] = kmalloc(9, GFP_ATOMIC);
 
300
                if (!commands[AT_PROTO])
 
301
                        goto oom;
 
302
                snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
 
303
 
 
304
                commands[AT_ISO] = kmalloc(9, GFP_ATOMIC);
 
305
                if (!commands[AT_ISO])
 
306
                        goto oom;
 
307
                snprintf(commands[AT_ISO], 9, "^SISO=%u\r",
 
308
                         (unsigned) bcs->channel + 1);
 
309
 
 
310
                if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands,
 
311
                                       bcs->at_state.seq_index, NULL)) {
 
312
                        for (i = 0; i < AT_NUM; ++i)
 
313
                                kfree(commands[i]);
 
314
                        kfree(commands);
 
315
                        gigaset_free_channel(bcs);
 
316
                        return -ENOMEM;
 
317
                }
 
318
                gigaset_schedule_event(cs);
 
319
                break;
 
320
        case ISDN_CMD_ACCEPTD:
 
321
                gig_dbg(DEBUG_CMD, "ISDN_CMD_ACCEPTD");
 
322
                if (ch >= cs->channels) {
 
323
                        dev_err(cs->dev,
 
324
                                "ISDN_CMD_ACCEPTD: invalid channel (%d)\n", ch);
 
325
                        return -EINVAL;
 
326
                }
 
327
                bcs = cs->bcs + ch;
 
328
                switch (bcs->proto2) {
 
329
                case L2_HDLC:
 
330
                        bcs->rx_bufsize = SBUFSIZE;
 
331
                        break;
 
332
                default:                        /* assume transparent */
 
333
                        bcs->rx_bufsize = TRANSBUFSIZE;
 
334
                }
 
335
                dev_kfree_skb(bcs->rx_skb);
 
336
                gigaset_new_rx_skb(bcs);
 
337
                if (!gigaset_add_event(cs, &bcs->at_state,
 
338
                                       EV_ACCEPT, NULL, 0, NULL))
 
339
                        return -ENOMEM;
 
340
                gigaset_schedule_event(cs);
 
341
 
 
342
                break;
 
343
        case ISDN_CMD_HANGUP:
 
344
                gig_dbg(DEBUG_CMD, "ISDN_CMD_HANGUP");
 
345
                if (ch >= cs->channels) {
 
346
                        dev_err(cs->dev,
 
347
                                "ISDN_CMD_HANGUP: invalid channel (%d)\n", ch);
 
348
                        return -EINVAL;
 
349
                }
 
350
                bcs = cs->bcs + ch;
 
351
                if (!gigaset_add_event(cs, &bcs->at_state,
 
352
                                       EV_HUP, NULL, 0, NULL))
 
353
                        return -ENOMEM;
 
354
                gigaset_schedule_event(cs);
 
355
 
 
356
                break;
 
357
        case ISDN_CMD_CLREAZ: /* Do not signal incoming signals */
 
358
                dev_info(cs->dev, "ignoring ISDN_CMD_CLREAZ\n");
 
359
                break;
 
360
        case ISDN_CMD_SETEAZ: /* Signal incoming calls for given MSN */
 
361
                dev_info(cs->dev, "ignoring ISDN_CMD_SETEAZ (%s)\n",
 
362
                         cntrl->parm.num);
 
363
                break;
 
364
        case ISDN_CMD_SETL2: /* Set L2 to given protocol */
 
365
                if (ch >= cs->channels) {
 
366
                        dev_err(cs->dev,
 
367
                                "ISDN_CMD_SETL2: invalid channel (%d)\n", ch);
 
368
                        return -EINVAL;
 
369
                }
 
370
                bcs = cs->bcs + ch;
 
371
                if (bcs->chstate & CHS_D_UP) {
 
372
                        dev_err(cs->dev,
 
373
                                "ISDN_CMD_SETL2: channel active (%d)\n", ch);
 
374
                        return -EINVAL;
 
375
                }
 
376
                switch (cntrl->arg >> 8) {
 
377
                case ISDN_PROTO_L2_HDLC:
 
378
                        gig_dbg(DEBUG_CMD, "ISDN_CMD_SETL2: setting L2_HDLC");
 
379
                        bcs->proto2 = L2_HDLC;
 
380
                        break;
 
381
                case ISDN_PROTO_L2_TRANS:
 
382
                        gig_dbg(DEBUG_CMD, "ISDN_CMD_SETL2: setting L2_VOICE");
 
383
                        bcs->proto2 = L2_VOICE;
 
384
                        break;
 
385
                default:
 
386
                        dev_err(cs->dev,
 
387
                                "ISDN_CMD_SETL2: unsupported protocol (%lu)\n",
 
388
                                cntrl->arg >> 8);
 
389
                        return -EINVAL;
 
390
                }
 
391
                break;
 
392
        case ISDN_CMD_SETL3: /* Set L3 to given protocol */
 
393
                gig_dbg(DEBUG_CMD, "ISDN_CMD_SETL3");
 
394
                if (ch >= cs->channels) {
 
395
                        dev_err(cs->dev,
 
396
                                "ISDN_CMD_SETL3: invalid channel (%d)\n", ch);
 
397
                        return -EINVAL;
 
398
                }
 
399
 
 
400
                if (cntrl->arg >> 8 != ISDN_PROTO_L3_TRANS) {
 
401
                        dev_err(cs->dev,
 
402
                                "ISDN_CMD_SETL3: unsupported protocol (%lu)\n",
 
403
                                cntrl->arg >> 8);
 
404
                        return -EINVAL;
 
405
                }
 
406
 
 
407
                break;
 
408
 
 
409
        default:
 
410
                gig_dbg(DEBUG_CMD, "unknown command %d from LL",
 
411
                        cntrl->command);
 
412
                return -EINVAL;
 
413
        }
 
414
 
 
415
        return retval;
 
416
 
 
417
oom:
 
418
        dev_err(bcs->cs->dev, "out of memory\n");
 
419
        for (i = 0; i < AT_NUM; ++i)
 
420
                kfree(commands[i]);
 
421
        kfree(commands);
 
422
        gigaset_free_channel(bcs);
 
423
        return -ENOMEM;
 
424
}
 
425
 
 
426
static void gigaset_i4l_cmd(struct cardstate *cs, int cmd)
 
427
{
 
428
        isdn_if *iif = cs->iif;
 
429
        isdn_ctrl command;
 
430
 
 
431
        command.driver = cs->myid;
 
432
        command.command = cmd;
 
433
        command.arg = 0;
 
434
        iif->statcallb(&command);
 
435
}
 
436
 
 
437
static void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd)
 
438
{
 
439
        isdn_if *iif = bcs->cs->iif;
 
440
        isdn_ctrl command;
 
441
 
 
442
        command.driver = bcs->cs->myid;
 
443
        command.command = cmd;
 
444
        command.arg = bcs->channel;
 
445
        iif->statcallb(&command);
 
446
}
 
447
 
 
448
/**
 
449
 * gigaset_isdn_icall() - signal incoming call
 
450
 * @at_state:   connection state structure.
 
451
 *
 
452
 * Called by main module to notify the LL that an incoming call has been
 
453
 * received. @at_state contains the parameters of the call.
 
454
 *
 
455
 * Return value: call disposition (ICALL_*)
 
456
 */
 
457
int gigaset_isdn_icall(struct at_state_t *at_state)
 
458
{
 
459
        struct cardstate *cs = at_state->cs;
 
460
        struct bc_state *bcs = at_state->bcs;
 
461
        isdn_if *iif = cs->iif;
 
462
        isdn_ctrl response;
 
463
        int retval;
 
464
 
 
465
        /* fill ICALL structure */
 
466
        response.parm.setup.si1 = 0;    /* default: unknown */
 
467
        response.parm.setup.si2 = 0;
 
468
        response.parm.setup.screen = 0;
 
469
        response.parm.setup.plan = 0;
 
470
        if (!at_state->str_var[STR_ZBC]) {
 
471
                /* no BC (internal call): assume speech, A-law */
 
472
                response.parm.setup.si1 = 1;
 
473
        } else if (!strcmp(at_state->str_var[STR_ZBC], "8890")) {
 
474
                /* unrestricted digital information */
 
475
                response.parm.setup.si1 = 7;
 
476
        } else if (!strcmp(at_state->str_var[STR_ZBC], "8090A3")) {
 
477
                /* speech, A-law */
 
478
                response.parm.setup.si1 = 1;
 
479
        } else if (!strcmp(at_state->str_var[STR_ZBC], "9090A3")) {
 
480
                /* 3,1 kHz audio, A-law */
 
481
                response.parm.setup.si1 = 1;
 
482
                response.parm.setup.si2 = 2;
 
483
        } else {
 
484
                dev_warn(cs->dev, "RING ignored - unsupported BC %s\n",
 
485
                     at_state->str_var[STR_ZBC]);
 
486
                return ICALL_IGNORE;
 
487
        }
 
488
        if (at_state->str_var[STR_NMBR]) {
 
489
                strlcpy(response.parm.setup.phone, at_state->str_var[STR_NMBR],
 
490
                        sizeof response.parm.setup.phone);
 
491
        } else
 
492
                response.parm.setup.phone[0] = 0;
 
493
        if (at_state->str_var[STR_ZCPN]) {
 
494
                strlcpy(response.parm.setup.eazmsn, at_state->str_var[STR_ZCPN],
 
495
                        sizeof response.parm.setup.eazmsn);
 
496
        } else
 
497
                response.parm.setup.eazmsn[0] = 0;
 
498
 
 
499
        if (!bcs) {
 
500
                dev_notice(cs->dev, "no channel for incoming call\n");
 
501
                response.command = ISDN_STAT_ICALLW;
 
502
                response.arg = 0;
 
503
        } else {
 
504
                gig_dbg(DEBUG_CMD, "Sending ICALL");
 
505
                response.command = ISDN_STAT_ICALL;
 
506
                response.arg = bcs->channel;
 
507
        }
 
508
        response.driver = cs->myid;
 
509
        retval = iif->statcallb(&response);
 
510
        gig_dbg(DEBUG_CMD, "Response: %d", retval);
 
511
        switch (retval) {
 
512
        case 0: /* no takers */
 
513
                return ICALL_IGNORE;
 
514
        case 1: /* alerting */
 
515
                bcs->chstate |= CHS_NOTIFY_LL;
 
516
                return ICALL_ACCEPT;
 
517
        case 2: /* reject */
 
518
                return ICALL_REJECT;
 
519
        case 3: /* incomplete */
 
520
                dev_warn(cs->dev,
 
521
                       "LL requested unsupported feature: Incomplete Number\n");
 
522
                return ICALL_IGNORE;
 
523
        case 4: /* proceeding */
 
524
                /* Gigaset will send ALERTING anyway.
 
525
                 * There doesn't seem to be a way to avoid this.
 
526
                 */
 
527
                return ICALL_ACCEPT;
 
528
        case 5: /* deflect */
 
529
                dev_warn(cs->dev,
 
530
                         "LL requested unsupported feature: Call Deflection\n");
 
531
                return ICALL_IGNORE;
 
532
        default:
 
533
                dev_err(cs->dev, "LL error %d on ICALL\n", retval);
 
534
                return ICALL_IGNORE;
 
535
        }
 
536
}
 
537
 
 
538
/**
 
539
 * gigaset_isdn_connD() - signal D channel connect
 
540
 * @bcs:        B channel descriptor structure.
 
541
 *
 
542
 * Called by main module to notify the LL that the D channel connection has
 
543
 * been established.
 
544
 */
 
545
void gigaset_isdn_connD(struct bc_state *bcs)
 
546
{
 
547
        gig_dbg(DEBUG_CMD, "sending DCONN");
 
548
        gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
 
549
}
 
550
 
 
551
/**
 
552
 * gigaset_isdn_hupD() - signal D channel hangup
 
553
 * @bcs:        B channel descriptor structure.
 
554
 *
 
555
 * Called by main module to notify the LL that the D channel connection has
 
556
 * been shut down.
 
557
 */
 
558
void gigaset_isdn_hupD(struct bc_state *bcs)
 
559
{
 
560
        gig_dbg(DEBUG_CMD, "sending DHUP");
 
561
        gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DHUP);
 
562
}
 
563
 
 
564
/**
 
565
 * gigaset_isdn_connB() - signal B channel connect
 
566
 * @bcs:        B channel descriptor structure.
 
567
 *
 
568
 * Called by main module to notify the LL that the B channel connection has
 
569
 * been established.
 
570
 */
 
571
void gigaset_isdn_connB(struct bc_state *bcs)
 
572
{
 
573
        gig_dbg(DEBUG_CMD, "sending BCONN");
 
574
        gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BCONN);
 
575
}
 
576
 
 
577
/**
 
578
 * gigaset_isdn_hupB() - signal B channel hangup
 
579
 * @bcs:        B channel descriptor structure.
 
580
 *
 
581
 * Called by main module to notify the LL that the B channel connection has
 
582
 * been shut down.
 
583
 */
 
584
void gigaset_isdn_hupB(struct bc_state *bcs)
 
585
{
 
586
        gig_dbg(DEBUG_CMD, "sending BHUP");
 
587
        gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BHUP);
 
588
}
 
589
 
 
590
/**
 
591
 * gigaset_isdn_start() - signal device availability
 
592
 * @cs:         device descriptor structure.
 
593
 *
 
594
 * Called by main module to notify the LL that the device is available for
 
595
 * use.
 
596
 */
 
597
void gigaset_isdn_start(struct cardstate *cs)
 
598
{
 
599
        gig_dbg(DEBUG_CMD, "sending RUN");
 
600
        gigaset_i4l_cmd(cs, ISDN_STAT_RUN);
 
601
}
 
602
 
 
603
/**
 
604
 * gigaset_isdn_stop() - signal device unavailability
 
605
 * @cs:         device descriptor structure.
 
606
 *
 
607
 * Called by main module to notify the LL that the device is no longer
 
608
 * available for use.
 
609
 */
 
610
void gigaset_isdn_stop(struct cardstate *cs)
 
611
{
 
612
        gig_dbg(DEBUG_CMD, "sending STOP");
 
613
        gigaset_i4l_cmd(cs, ISDN_STAT_STOP);
 
614
}
 
615
 
 
616
/**
 
617
 * gigaset_isdn_regdev() - register to LL
 
618
 * @cs:         device descriptor structure.
 
619
 * @isdnid:     device name.
 
620
 *
 
621
 * Return value: 1 for success, 0 for failure
 
622
 */
 
623
int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid)
 
624
{
 
625
        isdn_if *iif;
 
626
 
 
627
        pr_info("ISDN4Linux interface\n");
 
628
 
 
629
        iif = kmalloc(sizeof *iif, GFP_KERNEL);
 
630
        if (!iif) {
 
631
                pr_err("out of memory\n");
 
632
                return 0;
 
633
        }
 
634
 
 
635
        if (snprintf(iif->id, sizeof iif->id, "%s_%u", isdnid, cs->minor_index)
 
636
            >= sizeof iif->id) {
 
637
                pr_err("ID too long: %s\n", isdnid);
 
638
                kfree(iif);
 
639
                return 0;
 
640
        }
 
641
 
 
642
        iif->owner = THIS_MODULE;
 
643
        iif->channels = cs->channels;
 
644
        iif->maxbufsize = MAX_BUF_SIZE;
 
645
        iif->features = ISDN_FEATURE_L2_TRANS |
 
646
                ISDN_FEATURE_L2_HDLC |
 
647
                ISDN_FEATURE_L2_X75I |
 
648
                ISDN_FEATURE_L3_TRANS |
 
649
                ISDN_FEATURE_P_EURO;
 
650
        iif->hl_hdrlen = HW_HDR_LEN;            /* Area for storing ack */
 
651
        iif->command = command_from_LL;
 
652
        iif->writebuf_skb = writebuf_from_LL;
 
653
        iif->writecmd = NULL;                   /* Don't support isdnctrl */
 
654
        iif->readstat = NULL;                   /* Don't support isdnctrl */
 
655
        iif->rcvcallb_skb = NULL;               /* Will be set by LL */
 
656
        iif->statcallb = NULL;                  /* Will be set by LL */
 
657
 
 
658
        if (!register_isdn(iif)) {
 
659
                pr_err("register_isdn failed\n");
 
660
                kfree(iif);
 
661
                return 0;
 
662
        }
 
663
 
 
664
        cs->iif = iif;
 
665
        cs->myid = iif->channels;               /* Set my device id */
 
666
        cs->hw_hdr_len = HW_HDR_LEN;
 
667
        return 1;
 
668
}
 
669
 
 
670
/**
 
671
 * gigaset_isdn_unregdev() - unregister device from LL
 
672
 * @cs:         device descriptor structure.
 
673
 */
 
674
void gigaset_isdn_unregdev(struct cardstate *cs)
 
675
{
 
676
        gig_dbg(DEBUG_CMD, "sending UNLOAD");
 
677
        gigaset_i4l_cmd(cs, ISDN_STAT_UNLOAD);
 
678
        kfree(cs->iif);
 
679
        cs->iif = NULL;
 
680
}
 
681
 
 
682
/**
 
683
 * gigaset_isdn_regdrv() - register driver to LL
 
684
 */
 
685
void gigaset_isdn_regdrv(void)
 
686
{
 
687
        /* nothing to do */
 
688
}
 
689
 
 
690
/**
 
691
 * gigaset_isdn_unregdrv() - unregister driver from LL
 
692
 */
 
693
void gigaset_isdn_unregdrv(void)
 
694
{
 
695
        /* nothing to do */
 
696
}