Commit | Line | Data |
---|---|---|
6fd5ea63 HL |
1 | /* |
2 | * Stuff used by all variants of the driver | |
3 | * | |
70440cf2 | 4 | * Copyright (c) 2001 by Stefan Eilers, |
6fd5ea63 HL |
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 | * ===================================================================== | |
6fd5ea63 HL |
14 | */ |
15 | ||
16 | #include "gigaset.h" | |
17 | #include <linux/ctype.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/moduleparam.h> | |
20 | ||
21 | /* Version Information */ | |
70440cf2 | 22 | #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Tilman Schmidt <tilman@imap.cc>, Stefan Eilers" |
6fd5ea63 HL |
23 | #define DRIVER_DESC "Driver for Gigaset 307x" |
24 | ||
25 | /* Module parameters */ | |
26 | int gigaset_debuglevel = DEBUG_DEFAULT; | |
27 | EXPORT_SYMBOL_GPL(gigaset_debuglevel); | |
28 | module_param_named(debug, gigaset_debuglevel, int, S_IRUGO|S_IWUSR); | |
29 | MODULE_PARM_DESC(debug, "debug level"); | |
30 | ||
70440cf2 | 31 | /* driver state flags */ |
784d5858 TS |
32 | #define VALID_MINOR 0x01 |
33 | #define VALID_ID 0x02 | |
6fd5ea63 | 34 | |
6fd5ea63 | 35 | void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg, |
01371500 | 36 | size_t len, const unsigned char *buf) |
6fd5ea63 HL |
37 | { |
38 | unsigned char outbuf[80]; | |
784d5858 | 39 | unsigned char c; |
6fd5ea63 HL |
40 | size_t space = sizeof outbuf - 1; |
41 | unsigned char *out = outbuf; | |
01371500 | 42 | size_t numin = len; |
6fd5ea63 | 43 | |
01371500 | 44 | while (numin--) { |
784d5858 TS |
45 | c = *buf++; |
46 | if (c == '~' || c == '^' || c == '\\') { | |
01371500 | 47 | if (!space--) |
784d5858 TS |
48 | break; |
49 | *out++ = '\\'; | |
50 | } | |
51 | if (c & 0x80) { | |
01371500 | 52 | if (!space--) |
784d5858 TS |
53 | break; |
54 | *out++ = '~'; | |
55 | c ^= 0x80; | |
56 | } | |
57 | if (c < 0x20 || c == 0x7f) { | |
01371500 | 58 | if (!space--) |
784d5858 | 59 | break; |
6fd5ea63 | 60 | *out++ = '^'; |
784d5858 | 61 | c ^= 0x40; |
6fd5ea63 | 62 | } |
01371500 | 63 | if (!space--) |
784d5858 TS |
64 | break; |
65 | *out++ = c; | |
6fd5ea63 HL |
66 | } |
67 | *out = 0; | |
68 | ||
784d5858 | 69 | gig_dbg(level, "%s (%u bytes): %s", msg, (unsigned) len, outbuf); |
6fd5ea63 HL |
70 | } |
71 | EXPORT_SYMBOL_GPL(gigaset_dbg_buffer); | |
72 | ||
73 | static int setflags(struct cardstate *cs, unsigned flags, unsigned delay) | |
74 | { | |
75 | int r; | |
76 | ||
77 | r = cs->ops->set_modem_ctrl(cs, cs->control_state, flags); | |
78 | cs->control_state = flags; | |
79 | if (r < 0) | |
80 | return r; | |
81 | ||
82 | if (delay) { | |
83 | set_current_state(TASK_INTERRUPTIBLE); | |
84 | schedule_timeout(delay * HZ / 1000); | |
85 | } | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
90 | int gigaset_enterconfigmode(struct cardstate *cs) | |
91 | { | |
92 | int i, r; | |
93 | ||
6fd5ea63 HL |
94 | cs->control_state = TIOCM_RTS; //FIXME |
95 | ||
96 | r = setflags(cs, TIOCM_DTR, 200); | |
97 | if (r < 0) | |
98 | goto error; | |
99 | r = setflags(cs, 0, 200); | |
100 | if (r < 0) | |
101 | goto error; | |
102 | for (i = 0; i < 5; ++i) { | |
103 | r = setflags(cs, TIOCM_RTS, 100); | |
104 | if (r < 0) | |
105 | goto error; | |
106 | r = setflags(cs, 0, 100); | |
107 | if (r < 0) | |
108 | goto error; | |
109 | } | |
110 | r = setflags(cs, TIOCM_RTS|TIOCM_DTR, 800); | |
111 | if (r < 0) | |
112 | goto error; | |
113 | ||
114 | return 0; | |
115 | ||
116 | error: | |
784d5858 | 117 | dev_err(cs->dev, "error %d on setuartbits\n", -r); |
6fd5ea63 HL |
118 | cs->control_state = TIOCM_RTS|TIOCM_DTR; // FIXME is this a good value? |
119 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_RTS|TIOCM_DTR); | |
120 | ||
121 | return -1; //r | |
122 | } | |
123 | ||
124 | static int test_timeout(struct at_state_t *at_state) | |
125 | { | |
126 | if (!at_state->timer_expires) | |
127 | return 0; | |
128 | ||
129 | if (--at_state->timer_expires) { | |
784d5858 TS |
130 | gig_dbg(DEBUG_MCMD, "decreased timer of %p to %lu", |
131 | at_state, at_state->timer_expires); | |
6fd5ea63 HL |
132 | return 0; |
133 | } | |
134 | ||
135 | if (!gigaset_add_event(at_state->cs, at_state, EV_TIMEOUT, NULL, | |
69049cc8 | 136 | at_state->timer_index, NULL)) { |
6fd5ea63 HL |
137 | //FIXME what should we do? |
138 | } | |
139 | ||
140 | return 1; | |
141 | } | |
142 | ||
143 | static void timer_tick(unsigned long data) | |
144 | { | |
145 | struct cardstate *cs = (struct cardstate *) data; | |
146 | unsigned long flags; | |
147 | unsigned channel; | |
148 | struct at_state_t *at_state; | |
149 | int timeout = 0; | |
150 | ||
151 | spin_lock_irqsave(&cs->lock, flags); | |
152 | ||
153 | for (channel = 0; channel < cs->channels; ++channel) | |
154 | if (test_timeout(&cs->bcs[channel].at_state)) | |
155 | timeout = 1; | |
156 | ||
157 | if (test_timeout(&cs->at_state)) | |
158 | timeout = 1; | |
159 | ||
160 | list_for_each_entry(at_state, &cs->temp_at_states, list) | |
161 | if (test_timeout(at_state)) | |
162 | timeout = 1; | |
163 | ||
69049cc8 | 164 | if (cs->running) { |
ec81b5e6 | 165 | mod_timer(&cs->timer, jiffies + msecs_to_jiffies(GIG_TICK)); |
6fd5ea63 | 166 | if (timeout) { |
784d5858 | 167 | gig_dbg(DEBUG_CMD, "scheduling timeout"); |
6fd5ea63 HL |
168 | tasklet_schedule(&cs->event_tasklet); |
169 | } | |
170 | } | |
171 | ||
172 | spin_unlock_irqrestore(&cs->lock, flags); | |
173 | } | |
174 | ||
175 | int gigaset_get_channel(struct bc_state *bcs) | |
176 | { | |
177 | unsigned long flags; | |
178 | ||
179 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
e468c048 | 180 | if (bcs->use_count || !try_module_get(bcs->cs->driver->owner)) { |
784d5858 TS |
181 | gig_dbg(DEBUG_ANY, "could not allocate channel %d", |
182 | bcs->channel); | |
6fd5ea63 HL |
183 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
184 | return 0; | |
185 | } | |
186 | ++bcs->use_count; | |
187 | bcs->busy = 1; | |
784d5858 | 188 | gig_dbg(DEBUG_ANY, "allocated channel %d", bcs->channel); |
6fd5ea63 HL |
189 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
190 | return 1; | |
191 | } | |
192 | ||
193 | void gigaset_free_channel(struct bc_state *bcs) | |
194 | { | |
195 | unsigned long flags; | |
196 | ||
197 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
198 | if (!bcs->busy) { | |
784d5858 | 199 | gig_dbg(DEBUG_ANY, "could not free channel %d", bcs->channel); |
6fd5ea63 HL |
200 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
201 | return; | |
202 | } | |
203 | --bcs->use_count; | |
204 | bcs->busy = 0; | |
e468c048 | 205 | module_put(bcs->cs->driver->owner); |
784d5858 | 206 | gig_dbg(DEBUG_ANY, "freed channel %d", bcs->channel); |
6fd5ea63 HL |
207 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
208 | } | |
209 | ||
210 | int gigaset_get_channels(struct cardstate *cs) | |
211 | { | |
212 | unsigned long flags; | |
213 | int i; | |
214 | ||
215 | spin_lock_irqsave(&cs->lock, flags); | |
216 | for (i = 0; i < cs->channels; ++i) | |
217 | if (cs->bcs[i].use_count) { | |
218 | spin_unlock_irqrestore(&cs->lock, flags); | |
784d5858 | 219 | gig_dbg(DEBUG_ANY, "could not allocate all channels"); |
6fd5ea63 HL |
220 | return 0; |
221 | } | |
222 | for (i = 0; i < cs->channels; ++i) | |
223 | ++cs->bcs[i].use_count; | |
224 | spin_unlock_irqrestore(&cs->lock, flags); | |
225 | ||
784d5858 | 226 | gig_dbg(DEBUG_ANY, "allocated all channels"); |
6fd5ea63 HL |
227 | |
228 | return 1; | |
229 | } | |
230 | ||
231 | void gigaset_free_channels(struct cardstate *cs) | |
232 | { | |
233 | unsigned long flags; | |
234 | int i; | |
235 | ||
784d5858 | 236 | gig_dbg(DEBUG_ANY, "unblocking all channels"); |
6fd5ea63 HL |
237 | spin_lock_irqsave(&cs->lock, flags); |
238 | for (i = 0; i < cs->channels; ++i) | |
239 | --cs->bcs[i].use_count; | |
240 | spin_unlock_irqrestore(&cs->lock, flags); | |
241 | } | |
242 | ||
243 | void gigaset_block_channels(struct cardstate *cs) | |
244 | { | |
245 | unsigned long flags; | |
246 | int i; | |
247 | ||
784d5858 | 248 | gig_dbg(DEBUG_ANY, "blocking all channels"); |
6fd5ea63 HL |
249 | spin_lock_irqsave(&cs->lock, flags); |
250 | for (i = 0; i < cs->channels; ++i) | |
251 | ++cs->bcs[i].use_count; | |
252 | spin_unlock_irqrestore(&cs->lock, flags); | |
253 | } | |
254 | ||
255 | static void clear_events(struct cardstate *cs) | |
256 | { | |
257 | struct event_t *ev; | |
258 | unsigned head, tail; | |
69049cc8 | 259 | unsigned long flags; |
6fd5ea63 | 260 | |
69049cc8 | 261 | spin_lock_irqsave(&cs->ev_lock, flags); |
6fd5ea63 | 262 | |
69049cc8 TS |
263 | head = cs->ev_head; |
264 | tail = cs->ev_tail; | |
6fd5ea63 HL |
265 | |
266 | while (tail != head) { | |
267 | ev = cs->events + head; | |
268 | kfree(ev->ptr); | |
6fd5ea63 HL |
269 | head = (head + 1) % MAX_EVENTS; |
270 | } | |
271 | ||
69049cc8 TS |
272 | cs->ev_head = tail; |
273 | ||
274 | spin_unlock_irqrestore(&cs->ev_lock, flags); | |
6fd5ea63 HL |
275 | } |
276 | ||
277 | struct event_t *gigaset_add_event(struct cardstate *cs, | |
784d5858 TS |
278 | struct at_state_t *at_state, int type, |
279 | void *ptr, int parameter, void *arg) | |
6fd5ea63 HL |
280 | { |
281 | unsigned long flags; | |
282 | unsigned next, tail; | |
283 | struct event_t *event = NULL; | |
284 | ||
285 | spin_lock_irqsave(&cs->ev_lock, flags); | |
286 | ||
69049cc8 | 287 | tail = cs->ev_tail; |
6fd5ea63 | 288 | next = (tail + 1) % MAX_EVENTS; |
69049cc8 | 289 | if (unlikely(next == cs->ev_head)) |
5002779d | 290 | dev_err(cs->dev, "event queue full\n"); |
6fd5ea63 HL |
291 | else { |
292 | event = cs->events + tail; | |
293 | event->type = type; | |
294 | event->at_state = at_state; | |
295 | event->cid = -1; | |
296 | event->ptr = ptr; | |
297 | event->arg = arg; | |
298 | event->parameter = parameter; | |
69049cc8 | 299 | cs->ev_tail = next; |
6fd5ea63 HL |
300 | } |
301 | ||
302 | spin_unlock_irqrestore(&cs->ev_lock, flags); | |
303 | ||
304 | return event; | |
305 | } | |
306 | EXPORT_SYMBOL_GPL(gigaset_add_event); | |
307 | ||
308 | static void free_strings(struct at_state_t *at_state) | |
309 | { | |
310 | int i; | |
311 | ||
312 | for (i = 0; i < STR_NUM; ++i) { | |
313 | kfree(at_state->str_var[i]); | |
314 | at_state->str_var[i] = NULL; | |
315 | } | |
316 | } | |
317 | ||
318 | static void clear_at_state(struct at_state_t *at_state) | |
319 | { | |
320 | free_strings(at_state); | |
321 | } | |
322 | ||
323 | static void dealloc_at_states(struct cardstate *cs) | |
324 | { | |
325 | struct at_state_t *cur, *next; | |
326 | ||
327 | list_for_each_entry_safe(cur, next, &cs->temp_at_states, list) { | |
328 | list_del(&cur->list); | |
329 | free_strings(cur); | |
330 | kfree(cur); | |
331 | } | |
332 | } | |
333 | ||
334 | static void gigaset_freebcs(struct bc_state *bcs) | |
335 | { | |
336 | int i; | |
337 | ||
784d5858 | 338 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->hw", bcs->channel); |
6fd5ea63 | 339 | if (!bcs->cs->ops->freebcshw(bcs)) { |
784d5858 | 340 | gig_dbg(DEBUG_INIT, "failed"); |
6fd5ea63 HL |
341 | } |
342 | ||
784d5858 | 343 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]->at_state", bcs->channel); |
6fd5ea63 | 344 | clear_at_state(&bcs->at_state); |
784d5858 | 345 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->skb", bcs->channel); |
6fd5ea63 HL |
346 | |
347 | if (bcs->skb) | |
348 | dev_kfree_skb(bcs->skb); | |
349 | for (i = 0; i < AT_NUM; ++i) { | |
350 | kfree(bcs->commands[i]); | |
351 | bcs->commands[i] = NULL; | |
352 | } | |
353 | } | |
354 | ||
70440cf2 TS |
355 | static struct cardstate *alloc_cs(struct gigaset_driver *drv) |
356 | { | |
357 | unsigned long flags; | |
358 | unsigned i; | |
e468c048 | 359 | struct cardstate *cs; |
e702ff0b | 360 | struct cardstate *ret = NULL; |
70440cf2 TS |
361 | |
362 | spin_lock_irqsave(&drv->lock, flags); | |
e468c048 TS |
363 | if (drv->blocked) |
364 | goto exit; | |
70440cf2 | 365 | for (i = 0; i < drv->minors; ++i) { |
e468c048 TS |
366 | cs = drv->cs + i; |
367 | if (!(cs->flags & VALID_MINOR)) { | |
368 | cs->flags = VALID_MINOR; | |
369 | ret = cs; | |
70440cf2 | 370 | break; |
e702ff0b | 371 | } |
70440cf2 | 372 | } |
e468c048 | 373 | exit: |
70440cf2 TS |
374 | spin_unlock_irqrestore(&drv->lock, flags); |
375 | return ret; | |
376 | } | |
377 | ||
378 | static void free_cs(struct cardstate *cs) | |
379 | { | |
e468c048 | 380 | cs->flags = 0; |
70440cf2 TS |
381 | } |
382 | ||
383 | static void make_valid(struct cardstate *cs, unsigned mask) | |
384 | { | |
385 | unsigned long flags; | |
386 | struct gigaset_driver *drv = cs->driver; | |
387 | spin_lock_irqsave(&drv->lock, flags); | |
e468c048 | 388 | cs->flags |= mask; |
70440cf2 TS |
389 | spin_unlock_irqrestore(&drv->lock, flags); |
390 | } | |
391 | ||
392 | static void make_invalid(struct cardstate *cs, unsigned mask) | |
393 | { | |
394 | unsigned long flags; | |
395 | struct gigaset_driver *drv = cs->driver; | |
396 | spin_lock_irqsave(&drv->lock, flags); | |
e468c048 | 397 | cs->flags &= ~mask; |
70440cf2 TS |
398 | spin_unlock_irqrestore(&drv->lock, flags); |
399 | } | |
400 | ||
6fd5ea63 HL |
401 | void gigaset_freecs(struct cardstate *cs) |
402 | { | |
403 | int i; | |
404 | unsigned long flags; | |
405 | ||
406 | if (!cs) | |
407 | return; | |
408 | ||
abfd1dc7 | 409 | mutex_lock(&cs->mutex); |
6fd5ea63 HL |
410 | |
411 | if (!cs->bcs) | |
412 | goto f_cs; | |
413 | if (!cs->inbuf) | |
414 | goto f_bcs; | |
415 | ||
416 | spin_lock_irqsave(&cs->lock, flags); | |
69049cc8 | 417 | cs->running = 0; |
917f5085 TS |
418 | spin_unlock_irqrestore(&cs->lock, flags); /* event handler and timer are |
419 | not rescheduled below */ | |
6fd5ea63 HL |
420 | |
421 | tasklet_kill(&cs->event_tasklet); | |
422 | del_timer_sync(&cs->timer); | |
423 | ||
424 | switch (cs->cs_init) { | |
425 | default: | |
3dda4e37 HL |
426 | /* clear device sysfs */ |
427 | gigaset_free_dev_sysfs(cs); | |
428 | ||
6fd5ea63 HL |
429 | gigaset_if_free(cs); |
430 | ||
784d5858 | 431 | gig_dbg(DEBUG_INIT, "clearing hw"); |
6fd5ea63 HL |
432 | cs->ops->freecshw(cs); |
433 | ||
434 | //FIXME cmdbuf | |
435 | ||
436 | /* fall through */ | |
437 | case 2: /* error in initcshw */ | |
438 | /* Deregister from LL */ | |
439 | make_invalid(cs, VALID_ID); | |
784d5858 | 440 | gig_dbg(DEBUG_INIT, "clearing iif"); |
6fd5ea63 HL |
441 | gigaset_i4l_cmd(cs, ISDN_STAT_UNLOAD); |
442 | ||
443 | /* fall through */ | |
444 | case 1: /* error when regestering to LL */ | |
784d5858 | 445 | gig_dbg(DEBUG_INIT, "clearing at_state"); |
6fd5ea63 HL |
446 | clear_at_state(&cs->at_state); |
447 | dealloc_at_states(cs); | |
448 | ||
449 | /* fall through */ | |
450 | case 0: /* error in one call to initbcs */ | |
451 | for (i = 0; i < cs->channels; ++i) { | |
784d5858 | 452 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i); |
6fd5ea63 HL |
453 | gigaset_freebcs(cs->bcs + i); |
454 | } | |
455 | ||
456 | clear_events(cs); | |
784d5858 | 457 | gig_dbg(DEBUG_INIT, "freeing inbuf"); |
6fd5ea63 HL |
458 | kfree(cs->inbuf); |
459 | } | |
784d5858 | 460 | f_bcs: gig_dbg(DEBUG_INIT, "freeing bcs[]"); |
6fd5ea63 | 461 | kfree(cs->bcs); |
784d5858 | 462 | f_cs: gig_dbg(DEBUG_INIT, "freeing cs"); |
abfd1dc7 | 463 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
464 | free_cs(cs); |
465 | } | |
466 | EXPORT_SYMBOL_GPL(gigaset_freecs); | |
467 | ||
468 | void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs, | |
784d5858 | 469 | struct cardstate *cs, int cid) |
6fd5ea63 HL |
470 | { |
471 | int i; | |
472 | ||
473 | INIT_LIST_HEAD(&at_state->list); | |
474 | at_state->waiting = 0; | |
475 | at_state->getstring = 0; | |
476 | at_state->pending_commands = 0; | |
477 | at_state->timer_expires = 0; | |
478 | at_state->timer_active = 0; | |
69049cc8 TS |
479 | at_state->timer_index = 0; |
480 | at_state->seq_index = 0; | |
6fd5ea63 HL |
481 | at_state->ConState = 0; |
482 | for (i = 0; i < STR_NUM; ++i) | |
483 | at_state->str_var[i] = NULL; | |
484 | at_state->int_var[VAR_ZDLE] = 0; | |
485 | at_state->int_var[VAR_ZCTP] = -1; | |
486 | at_state->int_var[VAR_ZSAU] = ZSAU_NULL; | |
487 | at_state->cs = cs; | |
488 | at_state->bcs = bcs; | |
489 | at_state->cid = cid; | |
490 | if (!cid) | |
491 | at_state->replystruct = cs->tabnocid; | |
492 | else | |
493 | at_state->replystruct = cs->tabcid; | |
494 | } | |
495 | ||
496 | ||
497 | static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct bc_state *bcs, | |
784d5858 | 498 | struct cardstate *cs, int inputstate) |
6fd5ea63 HL |
499 | /* inbuf->read must be allocated before! */ |
500 | { | |
9d4bee2b TS |
501 | inbuf->head = 0; |
502 | inbuf->tail = 0; | |
6fd5ea63 HL |
503 | inbuf->cs = cs; |
504 | inbuf->bcs = bcs; /*base driver: NULL*/ | |
9d4bee2b | 505 | inbuf->rcvbuf = NULL; |
6fd5ea63 HL |
506 | inbuf->inputstate = inputstate; |
507 | } | |
508 | ||
714e8236 TS |
509 | /* append received bytes to inbuf */ |
510 | int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src, | |
511 | unsigned numbytes) | |
512 | { | |
513 | unsigned n, head, tail, bytesleft; | |
514 | ||
515 | gig_dbg(DEBUG_INTR, "received %u bytes", numbytes); | |
516 | ||
517 | if (!numbytes) | |
518 | return 0; | |
519 | ||
520 | bytesleft = numbytes; | |
9d4bee2b TS |
521 | tail = inbuf->tail; |
522 | head = inbuf->head; | |
714e8236 TS |
523 | gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail); |
524 | ||
525 | while (bytesleft) { | |
526 | if (head > tail) | |
527 | n = head - 1 - tail; | |
528 | else if (head == 0) | |
529 | n = (RBUFSIZE-1) - tail; | |
530 | else | |
531 | n = RBUFSIZE - tail; | |
532 | if (!n) { | |
533 | dev_err(inbuf->cs->dev, | |
898eb71c JP |
534 | "buffer overflow (%u bytes lost)\n", |
535 | bytesleft); | |
714e8236 TS |
536 | break; |
537 | } | |
538 | if (n > bytesleft) | |
539 | n = bytesleft; | |
540 | memcpy(inbuf->data + tail, src, n); | |
541 | bytesleft -= n; | |
542 | tail = (tail + n) % RBUFSIZE; | |
543 | src += n; | |
544 | } | |
545 | gig_dbg(DEBUG_INTR, "setting tail to %u", tail); | |
9d4bee2b | 546 | inbuf->tail = tail; |
714e8236 TS |
547 | return numbytes != bytesleft; |
548 | } | |
549 | EXPORT_SYMBOL_GPL(gigaset_fill_inbuf); | |
550 | ||
6fd5ea63 HL |
551 | /* Initialize the b-channel structure */ |
552 | static struct bc_state *gigaset_initbcs(struct bc_state *bcs, | |
784d5858 | 553 | struct cardstate *cs, int channel) |
6fd5ea63 HL |
554 | { |
555 | int i; | |
556 | ||
557 | bcs->tx_skb = NULL; //FIXME -> hw part | |
558 | ||
559 | skb_queue_head_init(&bcs->squeue); | |
560 | ||
561 | bcs->corrupted = 0; | |
562 | bcs->trans_down = 0; | |
563 | bcs->trans_up = 0; | |
564 | ||
784d5858 | 565 | gig_dbg(DEBUG_INIT, "setting up bcs[%d]->at_state", channel); |
6fd5ea63 HL |
566 | gigaset_at_init(&bcs->at_state, bcs, cs, -1); |
567 | ||
6fd5ea63 HL |
568 | #ifdef CONFIG_GIGASET_DEBUG |
569 | bcs->emptycount = 0; | |
570 | #endif | |
571 | ||
784d5858 | 572 | gig_dbg(DEBUG_INIT, "allocating bcs[%d]->skb", channel); |
6fd5ea63 HL |
573 | bcs->fcs = PPP_INITFCS; |
574 | bcs->inputstate = 0; | |
575 | if (cs->ignoreframes) { | |
576 | bcs->inputstate |= INS_skip_frame; | |
577 | bcs->skb = NULL; | |
578 | } else if ((bcs->skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN)) != NULL) | |
579 | skb_reserve(bcs->skb, HW_HDR_LEN); | |
580 | else { | |
c8770dca | 581 | pr_err("out of memory\n"); |
6fd5ea63 HL |
582 | bcs->inputstate |= INS_skip_frame; |
583 | } | |
584 | ||
585 | bcs->channel = channel; | |
586 | bcs->cs = cs; | |
587 | ||
588 | bcs->chstate = 0; | |
589 | bcs->use_count = 1; | |
590 | bcs->busy = 0; | |
591 | bcs->ignore = cs->ignoreframes; | |
592 | ||
593 | for (i = 0; i < AT_NUM; ++i) | |
594 | bcs->commands[i] = NULL; | |
595 | ||
784d5858 | 596 | gig_dbg(DEBUG_INIT, " setting up bcs[%d]->hw", channel); |
6fd5ea63 HL |
597 | if (cs->ops->initbcshw(bcs)) |
598 | return bcs; | |
599 | ||
784d5858 | 600 | gig_dbg(DEBUG_INIT, " failed"); |
6fd5ea63 | 601 | |
784d5858 | 602 | gig_dbg(DEBUG_INIT, " freeing bcs[%d]->skb", channel); |
6fd5ea63 HL |
603 | if (bcs->skb) |
604 | dev_kfree_skb(bcs->skb); | |
605 | ||
606 | return NULL; | |
607 | } | |
608 | ||
609 | /* gigaset_initcs | |
610 | * Allocate and initialize cardstate structure for Gigaset driver | |
611 | * Calls hardware dependent gigaset_initcshw() function | |
612 | * Calls B channel initialization function gigaset_initbcs() for each B channel | |
613 | * parameters: | |
784d5858 | 614 | * drv hardware driver the device belongs to |
6fd5ea63 | 615 | * channels number of B channels supported by device |
917f5085 TS |
616 | * onechannel !=0: B channel data and AT commands share one |
617 | * communication channel | |
6fd5ea63 HL |
618 | * ==0: B channels have separate communication channels |
619 | * ignoreframes number of frames to ignore after setting up B channel | |
620 | * cidmode !=0: start in CallID mode | |
621 | * modulename name of driver module (used for I4L registration) | |
622 | * return value: | |
623 | * pointer to cardstate structure | |
624 | */ | |
625 | struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels, | |
626 | int onechannel, int ignoreframes, | |
627 | int cidmode, const char *modulename) | |
628 | { | |
629 | struct cardstate *cs = NULL; | |
69049cc8 | 630 | unsigned long flags; |
6fd5ea63 HL |
631 | int i; |
632 | ||
784d5858 | 633 | gig_dbg(DEBUG_INIT, "allocating cs"); |
e702ff0b | 634 | if (!(cs = alloc_cs(drv))) { |
c8770dca | 635 | pr_err("maximum number of devices exceeded\n"); |
e702ff0b TS |
636 | return NULL; |
637 | } | |
e702ff0b | 638 | |
784d5858 | 639 | gig_dbg(DEBUG_INIT, "allocating bcs[0..%d]", channels - 1); |
6fd5ea63 | 640 | cs->bcs = kmalloc(channels * sizeof(struct bc_state), GFP_KERNEL); |
e702ff0b | 641 | if (!cs->bcs) { |
c8770dca | 642 | pr_err("out of memory\n"); |
6fd5ea63 | 643 | goto error; |
e702ff0b | 644 | } |
784d5858 | 645 | gig_dbg(DEBUG_INIT, "allocating inbuf"); |
6fd5ea63 | 646 | cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL); |
e702ff0b | 647 | if (!cs->inbuf) { |
c8770dca | 648 | pr_err("out of memory\n"); |
6fd5ea63 | 649 | goto error; |
e702ff0b | 650 | } |
6fd5ea63 HL |
651 | |
652 | cs->cs_init = 0; | |
653 | cs->channels = channels; | |
654 | cs->onechannel = onechannel; | |
655 | cs->ignoreframes = ignoreframes; | |
656 | INIT_LIST_HEAD(&cs->temp_at_states); | |
69049cc8 | 657 | cs->running = 0; |
6fd5ea63 HL |
658 | init_timer(&cs->timer); /* clear next & prev */ |
659 | spin_lock_init(&cs->ev_lock); | |
69049cc8 TS |
660 | cs->ev_tail = 0; |
661 | cs->ev_head = 0; | |
abfd1dc7 | 662 | |
917f5085 TS |
663 | tasklet_init(&cs->event_tasklet, &gigaset_handle_event, |
664 | (unsigned long) cs); | |
9d4bee2b | 665 | cs->commands_pending = 0; |
6fd5ea63 HL |
666 | cs->cur_at_seq = 0; |
667 | cs->gotfwver = -1; | |
668 | cs->open_count = 0; | |
784d5858 | 669 | cs->dev = NULL; |
6fd5ea63 | 670 | cs->tty = NULL; |
01107d34 | 671 | cs->tty_dev = NULL; |
69049cc8 | 672 | cs->cidmode = cidmode != 0; |
528efc6a TS |
673 | cs->tabnocid = gigaset_tab_nocid; |
674 | cs->tabcid = gigaset_tab_cid; | |
6fd5ea63 HL |
675 | |
676 | init_waitqueue_head(&cs->waitqueue); | |
677 | cs->waiting = 0; | |
678 | ||
9d4bee2b TS |
679 | cs->mode = M_UNKNOWN; |
680 | cs->mstate = MS_UNINITIALIZED; | |
6fd5ea63 HL |
681 | |
682 | for (i = 0; i < channels; ++i) { | |
784d5858 | 683 | gig_dbg(DEBUG_INIT, "setting up bcs[%d].read", i); |
e702ff0b | 684 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) { |
c8770dca | 685 | pr_err("could not allocate channel %d data\n", i); |
6fd5ea63 | 686 | goto error; |
e702ff0b | 687 | } |
6fd5ea63 HL |
688 | } |
689 | ||
690 | ++cs->cs_init; | |
691 | ||
784d5858 | 692 | gig_dbg(DEBUG_INIT, "setting up at_state"); |
6fd5ea63 HL |
693 | spin_lock_init(&cs->lock); |
694 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
695 | cs->dle = 0; | |
696 | cs->cbytes = 0; | |
697 | ||
784d5858 | 698 | gig_dbg(DEBUG_INIT, "setting up inbuf"); |
6fd5ea63 HL |
699 | if (onechannel) { //FIXME distinction necessary? |
700 | gigaset_inbuf_init(cs->inbuf, cs->bcs, cs, INS_command); | |
701 | } else | |
702 | gigaset_inbuf_init(cs->inbuf, NULL, cs, INS_command); | |
703 | ||
69049cc8 TS |
704 | cs->connected = 0; |
705 | cs->isdn_up = 0; | |
6fd5ea63 | 706 | |
784d5858 | 707 | gig_dbg(DEBUG_INIT, "setting up cmdbuf"); |
6fd5ea63 HL |
708 | cs->cmdbuf = cs->lastcmdbuf = NULL; |
709 | spin_lock_init(&cs->cmdlock); | |
710 | cs->curlen = 0; | |
711 | cs->cmdbytes = 0; | |
712 | ||
784d5858 | 713 | gig_dbg(DEBUG_INIT, "setting up iif"); |
6fd5ea63 | 714 | if (!gigaset_register_to_LL(cs, modulename)) { |
c8770dca | 715 | pr_err("error registering ISDN device\n"); |
6fd5ea63 HL |
716 | goto error; |
717 | } | |
718 | ||
719 | make_valid(cs, VALID_ID); | |
720 | ++cs->cs_init; | |
784d5858 | 721 | gig_dbg(DEBUG_INIT, "setting up hw"); |
c8770dca | 722 | if (!cs->ops->initcshw(cs)) |
6fd5ea63 HL |
723 | goto error; |
724 | ||
725 | ++cs->cs_init; | |
726 | ||
7435f50e | 727 | /* set up character device */ |
6fd5ea63 HL |
728 | gigaset_if_init(cs); |
729 | ||
3dda4e37 HL |
730 | /* set up device sysfs */ |
731 | gigaset_init_dev_sysfs(cs); | |
732 | ||
69049cc8 TS |
733 | spin_lock_irqsave(&cs->lock, flags); |
734 | cs->running = 1; | |
735 | spin_unlock_irqrestore(&cs->lock, flags); | |
ec81b5e6 TS |
736 | setup_timer(&cs->timer, timer_tick, (unsigned long) cs); |
737 | cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK); | |
6fd5ea63 HL |
738 | /* FIXME: can jiffies increase too much until the timer is added? |
739 | * Same problem(?) with mod_timer() in timer_tick(). */ | |
740 | add_timer(&cs->timer); | |
741 | ||
784d5858 | 742 | gig_dbg(DEBUG_INIT, "cs initialized"); |
6fd5ea63 HL |
743 | return cs; |
744 | ||
e702ff0b | 745 | error: |
784d5858 | 746 | gig_dbg(DEBUG_INIT, "failed"); |
6fd5ea63 HL |
747 | gigaset_freecs(cs); |
748 | return NULL; | |
749 | } | |
750 | EXPORT_SYMBOL_GPL(gigaset_initcs); | |
751 | ||
73a88814 | 752 | /* ReInitialize the b-channel structure on hangup */ |
6fd5ea63 HL |
753 | void gigaset_bcs_reinit(struct bc_state *bcs) |
754 | { | |
755 | struct sk_buff *skb; | |
756 | struct cardstate *cs = bcs->cs; | |
757 | unsigned long flags; | |
758 | ||
759 | while ((skb = skb_dequeue(&bcs->squeue)) != NULL) | |
760 | dev_kfree_skb(skb); | |
761 | ||
917f5085 | 762 | spin_lock_irqsave(&cs->lock, flags); |
6fd5ea63 HL |
763 | clear_at_state(&bcs->at_state); |
764 | bcs->at_state.ConState = 0; | |
765 | bcs->at_state.timer_active = 0; | |
766 | bcs->at_state.timer_expires = 0; | |
784d5858 | 767 | bcs->at_state.cid = -1; /* No CID defined */ |
6fd5ea63 HL |
768 | spin_unlock_irqrestore(&cs->lock, flags); |
769 | ||
770 | bcs->inputstate = 0; | |
771 | ||
772 | #ifdef CONFIG_GIGASET_DEBUG | |
773 | bcs->emptycount = 0; | |
774 | #endif | |
775 | ||
776 | bcs->fcs = PPP_INITFCS; | |
777 | bcs->chstate = 0; | |
778 | ||
779 | bcs->ignore = cs->ignoreframes; | |
780 | if (bcs->ignore) | |
781 | bcs->inputstate |= INS_skip_frame; | |
782 | ||
783 | ||
784 | cs->ops->reinitbcshw(bcs); | |
785 | } | |
786 | ||
787 | static void cleanup_cs(struct cardstate *cs) | |
788 | { | |
789 | struct cmdbuf_t *cb, *tcb; | |
790 | int i; | |
791 | unsigned long flags; | |
792 | ||
793 | spin_lock_irqsave(&cs->lock, flags); | |
794 | ||
9d4bee2b TS |
795 | cs->mode = M_UNKNOWN; |
796 | cs->mstate = MS_UNINITIALIZED; | |
6fd5ea63 HL |
797 | |
798 | clear_at_state(&cs->at_state); | |
799 | dealloc_at_states(cs); | |
800 | free_strings(&cs->at_state); | |
801 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
802 | ||
803 | kfree(cs->inbuf->rcvbuf); | |
804 | cs->inbuf->rcvbuf = NULL; | |
805 | cs->inbuf->inputstate = INS_command; | |
9d4bee2b TS |
806 | cs->inbuf->head = 0; |
807 | cs->inbuf->tail = 0; | |
6fd5ea63 HL |
808 | |
809 | cb = cs->cmdbuf; | |
810 | while (cb) { | |
811 | tcb = cb; | |
812 | cb = cb->next; | |
813 | kfree(tcb); | |
814 | } | |
815 | cs->cmdbuf = cs->lastcmdbuf = NULL; | |
816 | cs->curlen = 0; | |
817 | cs->cmdbytes = 0; | |
818 | cs->gotfwver = -1; | |
819 | cs->dle = 0; | |
820 | cs->cur_at_seq = 0; | |
9d4bee2b | 821 | cs->commands_pending = 0; |
6fd5ea63 HL |
822 | cs->cbytes = 0; |
823 | ||
824 | spin_unlock_irqrestore(&cs->lock, flags); | |
825 | ||
826 | for (i = 0; i < cs->channels; ++i) { | |
827 | gigaset_freebcs(cs->bcs + i); | |
828 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) | |
c8770dca | 829 | pr_err("could not allocate channel %d data\n", i); |
6fd5ea63 HL |
830 | } |
831 | ||
832 | if (cs->waiting) { | |
833 | cs->cmd_result = -ENODEV; | |
834 | cs->waiting = 0; | |
835 | wake_up_interruptible(&cs->waitqueue); | |
836 | } | |
837 | } | |
838 | ||
839 | ||
840 | int gigaset_start(struct cardstate *cs) | |
841 | { | |
69049cc8 TS |
842 | unsigned long flags; |
843 | ||
abfd1dc7 | 844 | if (mutex_lock_interruptible(&cs->mutex)) |
6fd5ea63 | 845 | return 0; |
6fd5ea63 | 846 | |
69049cc8 TS |
847 | spin_lock_irqsave(&cs->lock, flags); |
848 | cs->connected = 1; | |
849 | spin_unlock_irqrestore(&cs->lock, flags); | |
6fd5ea63 | 850 | |
9d4bee2b | 851 | if (cs->mstate != MS_LOCKED) { |
6fd5ea63 HL |
852 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR|TIOCM_RTS); |
853 | cs->ops->baud_rate(cs, B115200); | |
854 | cs->ops->set_line_ctrl(cs, CS8); | |
855 | cs->control_state = TIOCM_DTR|TIOCM_RTS; | |
856 | } else { | |
857 | //FIXME use some saved values? | |
858 | } | |
859 | ||
860 | cs->waiting = 1; | |
861 | ||
862 | if (!gigaset_add_event(cs, &cs->at_state, EV_START, NULL, 0, NULL)) { | |
863 | cs->waiting = 0; | |
864 | //FIXME what should we do? | |
865 | goto error; | |
866 | } | |
867 | ||
784d5858 | 868 | gig_dbg(DEBUG_CMD, "scheduling START"); |
6fd5ea63 HL |
869 | gigaset_schedule_event(cs); |
870 | ||
871 | wait_event(cs->waitqueue, !cs->waiting); | |
872 | ||
abfd1dc7 | 873 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
874 | return 1; |
875 | ||
876 | error: | |
abfd1dc7 | 877 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
878 | return 0; |
879 | } | |
880 | EXPORT_SYMBOL_GPL(gigaset_start); | |
881 | ||
e468c048 TS |
882 | /* gigaset_shutdown |
883 | * check if a device is associated to the cardstate structure and stop it | |
884 | * return value: 0 if ok, -1 if no device was associated | |
885 | */ | |
886 | int gigaset_shutdown(struct cardstate *cs) | |
6fd5ea63 | 887 | { |
abfd1dc7 | 888 | mutex_lock(&cs->mutex); |
6fd5ea63 | 889 | |
5d49c101 TS |
890 | if (!(cs->flags & VALID_MINOR)) { |
891 | mutex_unlock(&cs->mutex); | |
e468c048 | 892 | return -1; |
5d49c101 | 893 | } |
e468c048 | 894 | |
6fd5ea63 HL |
895 | cs->waiting = 1; |
896 | ||
897 | if (!gigaset_add_event(cs, &cs->at_state, EV_SHUTDOWN, NULL, 0, NULL)) { | |
898 | //FIXME what should we do? | |
899 | goto exit; | |
900 | } | |
901 | ||
784d5858 | 902 | gig_dbg(DEBUG_CMD, "scheduling SHUTDOWN"); |
6fd5ea63 HL |
903 | gigaset_schedule_event(cs); |
904 | ||
2869b23e | 905 | wait_event(cs->waitqueue, !cs->waiting); |
6fd5ea63 HL |
906 | |
907 | cleanup_cs(cs); | |
908 | ||
909 | exit: | |
abfd1dc7 | 910 | mutex_unlock(&cs->mutex); |
e468c048 | 911 | return 0; |
6fd5ea63 HL |
912 | } |
913 | EXPORT_SYMBOL_GPL(gigaset_shutdown); | |
914 | ||
915 | void gigaset_stop(struct cardstate *cs) | |
916 | { | |
abfd1dc7 | 917 | mutex_lock(&cs->mutex); |
6fd5ea63 | 918 | |
6fd5ea63 HL |
919 | cs->waiting = 1; |
920 | ||
921 | if (!gigaset_add_event(cs, &cs->at_state, EV_STOP, NULL, 0, NULL)) { | |
922 | //FIXME what should we do? | |
923 | goto exit; | |
924 | } | |
925 | ||
784d5858 | 926 | gig_dbg(DEBUG_CMD, "scheduling STOP"); |
6fd5ea63 HL |
927 | gigaset_schedule_event(cs); |
928 | ||
2869b23e | 929 | wait_event(cs->waitqueue, !cs->waiting); |
6fd5ea63 | 930 | |
6fd5ea63 HL |
931 | cleanup_cs(cs); |
932 | ||
933 | exit: | |
abfd1dc7 | 934 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
935 | } |
936 | EXPORT_SYMBOL_GPL(gigaset_stop); | |
937 | ||
938 | static LIST_HEAD(drivers); | |
34af946a | 939 | static DEFINE_SPINLOCK(driver_lock); |
6fd5ea63 HL |
940 | |
941 | struct cardstate *gigaset_get_cs_by_id(int id) | |
942 | { | |
943 | unsigned long flags; | |
35dc8457 TS |
944 | struct cardstate *ret = NULL; |
945 | struct cardstate *cs; | |
6fd5ea63 HL |
946 | struct gigaset_driver *drv; |
947 | unsigned i; | |
948 | ||
949 | spin_lock_irqsave(&driver_lock, flags); | |
950 | list_for_each_entry(drv, &drivers, list) { | |
951 | spin_lock(&drv->lock); | |
952 | for (i = 0; i < drv->minors; ++i) { | |
e468c048 TS |
953 | cs = drv->cs + i; |
954 | if ((cs->flags & VALID_ID) && cs->myid == id) { | |
955 | ret = cs; | |
6fd5ea63 | 956 | break; |
e468c048 | 957 | } |
6fd5ea63 HL |
958 | } |
959 | spin_unlock(&drv->lock); | |
960 | if (ret) | |
961 | break; | |
962 | } | |
963 | spin_unlock_irqrestore(&driver_lock, flags); | |
964 | return ret; | |
965 | } | |
966 | ||
967 | void gigaset_debugdrivers(void) | |
968 | { | |
969 | unsigned long flags; | |
970 | static struct cardstate *cs; | |
971 | struct gigaset_driver *drv; | |
972 | unsigned i; | |
973 | ||
974 | spin_lock_irqsave(&driver_lock, flags); | |
975 | list_for_each_entry(drv, &drivers, list) { | |
784d5858 | 976 | gig_dbg(DEBUG_DRIVER, "driver %p", drv); |
6fd5ea63 HL |
977 | spin_lock(&drv->lock); |
978 | for (i = 0; i < drv->minors; ++i) { | |
784d5858 | 979 | gig_dbg(DEBUG_DRIVER, " index %u", i); |
6fd5ea63 | 980 | cs = drv->cs + i; |
784d5858 | 981 | gig_dbg(DEBUG_DRIVER, " cardstate %p", cs); |
e468c048 | 982 | gig_dbg(DEBUG_DRIVER, " flags 0x%02x", cs->flags); |
784d5858 TS |
983 | gig_dbg(DEBUG_DRIVER, " minor_index %u", |
984 | cs->minor_index); | |
985 | gig_dbg(DEBUG_DRIVER, " driver %p", cs->driver); | |
986 | gig_dbg(DEBUG_DRIVER, " i4l id %d", cs->myid); | |
6fd5ea63 HL |
987 | } |
988 | spin_unlock(&drv->lock); | |
989 | } | |
990 | spin_unlock_irqrestore(&driver_lock, flags); | |
991 | } | |
6fd5ea63 | 992 | |
8ca445df | 993 | static struct cardstate *gigaset_get_cs_by_minor(unsigned minor) |
6fd5ea63 HL |
994 | { |
995 | unsigned long flags; | |
35dc8457 | 996 | struct cardstate *ret = NULL; |
6fd5ea63 HL |
997 | struct gigaset_driver *drv; |
998 | unsigned index; | |
999 | ||
1000 | spin_lock_irqsave(&driver_lock, flags); | |
1001 | list_for_each_entry(drv, &drivers, list) { | |
1002 | if (minor < drv->minor || minor >= drv->minor + drv->minors) | |
1003 | continue; | |
1004 | index = minor - drv->minor; | |
1005 | spin_lock(&drv->lock); | |
e468c048 | 1006 | if (drv->cs[index].flags & VALID_MINOR) |
6fd5ea63 HL |
1007 | ret = drv->cs + index; |
1008 | spin_unlock(&drv->lock); | |
1009 | if (ret) | |
1010 | break; | |
1011 | } | |
1012 | spin_unlock_irqrestore(&driver_lock, flags); | |
1013 | return ret; | |
1014 | } | |
1015 | ||
8ca445df AB |
1016 | struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty) |
1017 | { | |
1018 | if (tty->index < 0 || tty->index >= tty->driver->num) | |
1019 | return NULL; | |
1020 | return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start); | |
1021 | } | |
1022 | ||
6fd5ea63 HL |
1023 | void gigaset_freedriver(struct gigaset_driver *drv) |
1024 | { | |
1025 | unsigned long flags; | |
1026 | ||
1027 | spin_lock_irqsave(&driver_lock, flags); | |
1028 | list_del(&drv->list); | |
1029 | spin_unlock_irqrestore(&driver_lock, flags); | |
1030 | ||
1031 | gigaset_if_freedriver(drv); | |
6fd5ea63 HL |
1032 | |
1033 | kfree(drv->cs); | |
6fd5ea63 HL |
1034 | kfree(drv); |
1035 | } | |
1036 | EXPORT_SYMBOL_GPL(gigaset_freedriver); | |
1037 | ||
1038 | /* gigaset_initdriver | |
1039 | * Allocate and initialize gigaset_driver structure. Initialize interface. | |
1040 | * parameters: | |
784d5858 TS |
1041 | * minor First minor number |
1042 | * minors Number of minors this driver can handle | |
1043 | * procname Name of the driver | |
1044 | * devname Name of the device files (prefix without minor number) | |
6fd5ea63 | 1045 | * return value: |
784d5858 | 1046 | * Pointer to the gigaset_driver structure on success, NULL on failure. |
6fd5ea63 HL |
1047 | */ |
1048 | struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors, | |
784d5858 TS |
1049 | const char *procname, |
1050 | const char *devname, | |
784d5858 TS |
1051 | const struct gigaset_ops *ops, |
1052 | struct module *owner) | |
6fd5ea63 HL |
1053 | { |
1054 | struct gigaset_driver *drv; | |
1055 | unsigned long flags; | |
1056 | unsigned i; | |
1057 | ||
1058 | drv = kmalloc(sizeof *drv, GFP_KERNEL); | |
1059 | if (!drv) | |
1060 | return NULL; | |
f4675c70 | 1061 | |
6fd5ea63 HL |
1062 | drv->have_tty = 0; |
1063 | drv->minor = minor; | |
1064 | drv->minors = minors; | |
1065 | spin_lock_init(&drv->lock); | |
1066 | drv->blocked = 0; | |
1067 | drv->ops = ops; | |
1068 | drv->owner = owner; | |
1069 | INIT_LIST_HEAD(&drv->list); | |
1070 | ||
1071 | drv->cs = kmalloc(minors * sizeof *drv->cs, GFP_KERNEL); | |
1072 | if (!drv->cs) | |
e702ff0b | 1073 | goto error; |
f4675c70 | 1074 | |
6fd5ea63 | 1075 | for (i = 0; i < minors; ++i) { |
e468c048 | 1076 | drv->cs[i].flags = 0; |
6fd5ea63 HL |
1077 | drv->cs[i].driver = drv; |
1078 | drv->cs[i].ops = drv->ops; | |
1079 | drv->cs[i].minor_index = i; | |
5d49c101 | 1080 | mutex_init(&drv->cs[i].mutex); |
6fd5ea63 HL |
1081 | } |
1082 | ||
f4eaa370 | 1083 | gigaset_if_initdriver(drv, procname, devname); |
6fd5ea63 HL |
1084 | |
1085 | spin_lock_irqsave(&driver_lock, flags); | |
1086 | list_add(&drv->list, &drivers); | |
1087 | spin_unlock_irqrestore(&driver_lock, flags); | |
1088 | ||
1089 | return drv; | |
1090 | ||
e702ff0b | 1091 | error: |
6fd5ea63 | 1092 | kfree(drv->cs); |
6fd5ea63 | 1093 | kfree(drv); |
6fd5ea63 HL |
1094 | return NULL; |
1095 | } | |
1096 | EXPORT_SYMBOL_GPL(gigaset_initdriver); | |
1097 | ||
6fd5ea63 HL |
1098 | void gigaset_blockdriver(struct gigaset_driver *drv) |
1099 | { | |
6fd5ea63 | 1100 | drv->blocked = 1; |
6fd5ea63 HL |
1101 | } |
1102 | EXPORT_SYMBOL_GPL(gigaset_blockdriver); | |
1103 | ||
1104 | static int __init gigaset_init_module(void) | |
1105 | { | |
1106 | /* in accordance with the principle of least astonishment, | |
1107 | * setting the 'debug' parameter to 1 activates a sensible | |
1108 | * set of default debug levels | |
1109 | */ | |
1110 | if (gigaset_debuglevel == 1) | |
1111 | gigaset_debuglevel = DEBUG_DEFAULT; | |
1112 | ||
c8770dca | 1113 | pr_info(DRIVER_DESC "\n"); |
6fd5ea63 HL |
1114 | return 0; |
1115 | } | |
1116 | ||
1117 | static void __exit gigaset_exit_module(void) | |
1118 | { | |
1119 | } | |
1120 | ||
1121 | module_init(gigaset_init_module); | |
1122 | module_exit(gigaset_exit_module); | |
1123 | ||
1124 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1125 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1126 | ||
1127 | MODULE_LICENSE("GPL"); |