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Commit | Line | Data |
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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 | ||
2038724c TS |
25 | #ifdef CONFIG_GIGASET_DEBUG |
26 | #define DRIVER_DESC_DEBUG " (debug build)" | |
27 | #else | |
28 | #define DRIVER_DESC_DEBUG "" | |
29 | #endif | |
30 | ||
6fd5ea63 | 31 | /* Module parameters */ |
073886ff | 32 | int gigaset_debuglevel; |
6fd5ea63 HL |
33 | EXPORT_SYMBOL_GPL(gigaset_debuglevel); |
34 | module_param_named(debug, gigaset_debuglevel, int, S_IRUGO|S_IWUSR); | |
35 | MODULE_PARM_DESC(debug, "debug level"); | |
36 | ||
70440cf2 | 37 | /* driver state flags */ |
784d5858 TS |
38 | #define VALID_MINOR 0x01 |
39 | #define VALID_ID 0x02 | |
6fd5ea63 | 40 | |
1cec9727 TS |
41 | /** |
42 | * gigaset_dbg_buffer() - dump data in ASCII and hex for debugging | |
43 | * @level: debugging level. | |
44 | * @msg: message prefix. | |
45 | * @len: number of bytes to dump. | |
46 | * @buf: data to dump. | |
47 | * | |
48 | * If the current debugging level includes one of the bits set in @level, | |
49 | * @len bytes starting at @buf are logged to dmesg at KERN_DEBUG prio, | |
50 | * prefixed by the text @msg. | |
51 | */ | |
6fd5ea63 | 52 | void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg, |
01371500 | 53 | size_t len, const unsigned char *buf) |
6fd5ea63 HL |
54 | { |
55 | unsigned char outbuf[80]; | |
784d5858 | 56 | unsigned char c; |
6fd5ea63 HL |
57 | size_t space = sizeof outbuf - 1; |
58 | unsigned char *out = outbuf; | |
01371500 | 59 | size_t numin = len; |
6fd5ea63 | 60 | |
01371500 | 61 | while (numin--) { |
784d5858 TS |
62 | c = *buf++; |
63 | if (c == '~' || c == '^' || c == '\\') { | |
01371500 | 64 | if (!space--) |
784d5858 TS |
65 | break; |
66 | *out++ = '\\'; | |
67 | } | |
68 | if (c & 0x80) { | |
01371500 | 69 | if (!space--) |
784d5858 TS |
70 | break; |
71 | *out++ = '~'; | |
72 | c ^= 0x80; | |
73 | } | |
74 | if (c < 0x20 || c == 0x7f) { | |
01371500 | 75 | if (!space--) |
784d5858 | 76 | break; |
6fd5ea63 | 77 | *out++ = '^'; |
784d5858 | 78 | c ^= 0x40; |
6fd5ea63 | 79 | } |
01371500 | 80 | if (!space--) |
784d5858 TS |
81 | break; |
82 | *out++ = c; | |
6fd5ea63 HL |
83 | } |
84 | *out = 0; | |
85 | ||
784d5858 | 86 | gig_dbg(level, "%s (%u bytes): %s", msg, (unsigned) len, outbuf); |
6fd5ea63 HL |
87 | } |
88 | EXPORT_SYMBOL_GPL(gigaset_dbg_buffer); | |
89 | ||
90 | static int setflags(struct cardstate *cs, unsigned flags, unsigned delay) | |
91 | { | |
92 | int r; | |
93 | ||
94 | r = cs->ops->set_modem_ctrl(cs, cs->control_state, flags); | |
95 | cs->control_state = flags; | |
96 | if (r < 0) | |
97 | return r; | |
98 | ||
99 | if (delay) { | |
100 | set_current_state(TASK_INTERRUPTIBLE); | |
101 | schedule_timeout(delay * HZ / 1000); | |
102 | } | |
103 | ||
104 | return 0; | |
105 | } | |
106 | ||
107 | int gigaset_enterconfigmode(struct cardstate *cs) | |
108 | { | |
109 | int i, r; | |
110 | ||
d9ba9c91 | 111 | cs->control_state = TIOCM_RTS; |
6fd5ea63 HL |
112 | |
113 | r = setflags(cs, TIOCM_DTR, 200); | |
114 | if (r < 0) | |
115 | goto error; | |
116 | r = setflags(cs, 0, 200); | |
117 | if (r < 0) | |
118 | goto error; | |
119 | for (i = 0; i < 5; ++i) { | |
120 | r = setflags(cs, TIOCM_RTS, 100); | |
121 | if (r < 0) | |
122 | goto error; | |
123 | r = setflags(cs, 0, 100); | |
124 | if (r < 0) | |
125 | goto error; | |
126 | } | |
127 | r = setflags(cs, TIOCM_RTS|TIOCM_DTR, 800); | |
128 | if (r < 0) | |
129 | goto error; | |
130 | ||
131 | return 0; | |
132 | ||
133 | error: | |
784d5858 | 134 | dev_err(cs->dev, "error %d on setuartbits\n", -r); |
d9ba9c91 | 135 | cs->control_state = TIOCM_RTS|TIOCM_DTR; |
6fd5ea63 HL |
136 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_RTS|TIOCM_DTR); |
137 | ||
d9ba9c91 | 138 | return -1; |
6fd5ea63 HL |
139 | } |
140 | ||
141 | static int test_timeout(struct at_state_t *at_state) | |
142 | { | |
143 | if (!at_state->timer_expires) | |
144 | return 0; | |
145 | ||
146 | if (--at_state->timer_expires) { | |
784d5858 TS |
147 | gig_dbg(DEBUG_MCMD, "decreased timer of %p to %lu", |
148 | at_state, at_state->timer_expires); | |
6fd5ea63 HL |
149 | return 0; |
150 | } | |
151 | ||
152 | if (!gigaset_add_event(at_state->cs, at_state, EV_TIMEOUT, NULL, | |
d9ba9c91 TS |
153 | at_state->timer_index, NULL)) |
154 | dev_err(at_state->cs->dev, "%s: out of memory\n", | |
155 | __func__); | |
6fd5ea63 HL |
156 | return 1; |
157 | } | |
158 | ||
159 | static void timer_tick(unsigned long data) | |
160 | { | |
161 | struct cardstate *cs = (struct cardstate *) data; | |
162 | unsigned long flags; | |
163 | unsigned channel; | |
164 | struct at_state_t *at_state; | |
165 | int timeout = 0; | |
166 | ||
167 | spin_lock_irqsave(&cs->lock, flags); | |
168 | ||
169 | for (channel = 0; channel < cs->channels; ++channel) | |
170 | if (test_timeout(&cs->bcs[channel].at_state)) | |
171 | timeout = 1; | |
172 | ||
173 | if (test_timeout(&cs->at_state)) | |
174 | timeout = 1; | |
175 | ||
176 | list_for_each_entry(at_state, &cs->temp_at_states, list) | |
177 | if (test_timeout(at_state)) | |
178 | timeout = 1; | |
179 | ||
69049cc8 | 180 | if (cs->running) { |
ec81b5e6 | 181 | mod_timer(&cs->timer, jiffies + msecs_to_jiffies(GIG_TICK)); |
6fd5ea63 | 182 | if (timeout) { |
784d5858 | 183 | gig_dbg(DEBUG_CMD, "scheduling timeout"); |
6fd5ea63 HL |
184 | tasklet_schedule(&cs->event_tasklet); |
185 | } | |
186 | } | |
187 | ||
188 | spin_unlock_irqrestore(&cs->lock, flags); | |
189 | } | |
190 | ||
191 | int gigaset_get_channel(struct bc_state *bcs) | |
192 | { | |
193 | unsigned long flags; | |
194 | ||
195 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
e468c048 | 196 | if (bcs->use_count || !try_module_get(bcs->cs->driver->owner)) { |
784d5858 TS |
197 | gig_dbg(DEBUG_ANY, "could not allocate channel %d", |
198 | bcs->channel); | |
6fd5ea63 HL |
199 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
200 | return 0; | |
201 | } | |
202 | ++bcs->use_count; | |
203 | bcs->busy = 1; | |
784d5858 | 204 | gig_dbg(DEBUG_ANY, "allocated channel %d", bcs->channel); |
6fd5ea63 HL |
205 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
206 | return 1; | |
207 | } | |
208 | ||
7bb5fdc2 TS |
209 | struct bc_state *gigaset_get_free_channel(struct cardstate *cs) |
210 | { | |
211 | unsigned long flags; | |
212 | int i; | |
213 | ||
214 | spin_lock_irqsave(&cs->lock, flags); | |
215 | if (!try_module_get(cs->driver->owner)) { | |
216 | gig_dbg(DEBUG_ANY, | |
217 | "could not get module for allocating channel"); | |
218 | spin_unlock_irqrestore(&cs->lock, flags); | |
219 | return NULL; | |
220 | } | |
221 | for (i = 0; i < cs->channels; ++i) | |
222 | if (!cs->bcs[i].use_count) { | |
223 | ++cs->bcs[i].use_count; | |
224 | cs->bcs[i].busy = 1; | |
225 | spin_unlock_irqrestore(&cs->lock, flags); | |
226 | gig_dbg(DEBUG_ANY, "allocated channel %d", i); | |
227 | return cs->bcs + i; | |
228 | } | |
229 | module_put(cs->driver->owner); | |
230 | spin_unlock_irqrestore(&cs->lock, flags); | |
231 | gig_dbg(DEBUG_ANY, "no free channel"); | |
232 | return NULL; | |
233 | } | |
234 | ||
6fd5ea63 HL |
235 | void gigaset_free_channel(struct bc_state *bcs) |
236 | { | |
237 | unsigned long flags; | |
238 | ||
239 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
240 | if (!bcs->busy) { | |
784d5858 | 241 | gig_dbg(DEBUG_ANY, "could not free channel %d", bcs->channel); |
6fd5ea63 HL |
242 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
243 | return; | |
244 | } | |
245 | --bcs->use_count; | |
246 | bcs->busy = 0; | |
e468c048 | 247 | module_put(bcs->cs->driver->owner); |
784d5858 | 248 | gig_dbg(DEBUG_ANY, "freed channel %d", bcs->channel); |
6fd5ea63 HL |
249 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
250 | } | |
251 | ||
252 | int gigaset_get_channels(struct cardstate *cs) | |
253 | { | |
254 | unsigned long flags; | |
255 | int i; | |
256 | ||
257 | spin_lock_irqsave(&cs->lock, flags); | |
258 | for (i = 0; i < cs->channels; ++i) | |
259 | if (cs->bcs[i].use_count) { | |
260 | spin_unlock_irqrestore(&cs->lock, flags); | |
784d5858 | 261 | gig_dbg(DEBUG_ANY, "could not allocate all channels"); |
6fd5ea63 HL |
262 | return 0; |
263 | } | |
264 | for (i = 0; i < cs->channels; ++i) | |
265 | ++cs->bcs[i].use_count; | |
266 | spin_unlock_irqrestore(&cs->lock, flags); | |
267 | ||
784d5858 | 268 | gig_dbg(DEBUG_ANY, "allocated all channels"); |
6fd5ea63 HL |
269 | |
270 | return 1; | |
271 | } | |
272 | ||
273 | void gigaset_free_channels(struct cardstate *cs) | |
274 | { | |
275 | unsigned long flags; | |
276 | int i; | |
277 | ||
784d5858 | 278 | gig_dbg(DEBUG_ANY, "unblocking all channels"); |
6fd5ea63 HL |
279 | spin_lock_irqsave(&cs->lock, flags); |
280 | for (i = 0; i < cs->channels; ++i) | |
281 | --cs->bcs[i].use_count; | |
282 | spin_unlock_irqrestore(&cs->lock, flags); | |
283 | } | |
284 | ||
285 | void gigaset_block_channels(struct cardstate *cs) | |
286 | { | |
287 | unsigned long flags; | |
288 | int i; | |
289 | ||
784d5858 | 290 | gig_dbg(DEBUG_ANY, "blocking all channels"); |
6fd5ea63 HL |
291 | spin_lock_irqsave(&cs->lock, flags); |
292 | for (i = 0; i < cs->channels; ++i) | |
293 | ++cs->bcs[i].use_count; | |
294 | spin_unlock_irqrestore(&cs->lock, flags); | |
295 | } | |
296 | ||
297 | static void clear_events(struct cardstate *cs) | |
298 | { | |
299 | struct event_t *ev; | |
300 | unsigned head, tail; | |
69049cc8 | 301 | unsigned long flags; |
6fd5ea63 | 302 | |
69049cc8 | 303 | spin_lock_irqsave(&cs->ev_lock, flags); |
6fd5ea63 | 304 | |
69049cc8 TS |
305 | head = cs->ev_head; |
306 | tail = cs->ev_tail; | |
6fd5ea63 HL |
307 | |
308 | while (tail != head) { | |
309 | ev = cs->events + head; | |
310 | kfree(ev->ptr); | |
6fd5ea63 HL |
311 | head = (head + 1) % MAX_EVENTS; |
312 | } | |
313 | ||
69049cc8 TS |
314 | cs->ev_head = tail; |
315 | ||
316 | spin_unlock_irqrestore(&cs->ev_lock, flags); | |
6fd5ea63 HL |
317 | } |
318 | ||
1cec9727 TS |
319 | /** |
320 | * gigaset_add_event() - add event to device event queue | |
321 | * @cs: device descriptor structure. | |
322 | * @at_state: connection state structure. | |
323 | * @type: event type. | |
324 | * @ptr: pointer parameter for event. | |
325 | * @parameter: integer parameter for event. | |
326 | * @arg: pointer parameter for event. | |
327 | * | |
328 | * Allocate an event queue entry from the device's event queue, and set it up | |
329 | * with the parameters given. | |
330 | * | |
331 | * Return value: added event | |
332 | */ | |
6fd5ea63 | 333 | struct event_t *gigaset_add_event(struct cardstate *cs, |
784d5858 TS |
334 | struct at_state_t *at_state, int type, |
335 | void *ptr, int parameter, void *arg) | |
6fd5ea63 HL |
336 | { |
337 | unsigned long flags; | |
338 | unsigned next, tail; | |
339 | struct event_t *event = NULL; | |
340 | ||
341 | spin_lock_irqsave(&cs->ev_lock, flags); | |
342 | ||
69049cc8 | 343 | tail = cs->ev_tail; |
6fd5ea63 | 344 | next = (tail + 1) % MAX_EVENTS; |
69049cc8 | 345 | if (unlikely(next == cs->ev_head)) |
5002779d | 346 | dev_err(cs->dev, "event queue full\n"); |
6fd5ea63 HL |
347 | else { |
348 | event = cs->events + tail; | |
349 | event->type = type; | |
350 | event->at_state = at_state; | |
351 | event->cid = -1; | |
352 | event->ptr = ptr; | |
353 | event->arg = arg; | |
354 | event->parameter = parameter; | |
69049cc8 | 355 | cs->ev_tail = next; |
6fd5ea63 HL |
356 | } |
357 | ||
358 | spin_unlock_irqrestore(&cs->ev_lock, flags); | |
359 | ||
360 | return event; | |
361 | } | |
362 | EXPORT_SYMBOL_GPL(gigaset_add_event); | |
363 | ||
364 | static void free_strings(struct at_state_t *at_state) | |
365 | { | |
366 | int i; | |
367 | ||
368 | for (i = 0; i < STR_NUM; ++i) { | |
369 | kfree(at_state->str_var[i]); | |
370 | at_state->str_var[i] = NULL; | |
371 | } | |
372 | } | |
373 | ||
374 | static void clear_at_state(struct at_state_t *at_state) | |
375 | { | |
376 | free_strings(at_state); | |
377 | } | |
378 | ||
379 | static void dealloc_at_states(struct cardstate *cs) | |
380 | { | |
381 | struct at_state_t *cur, *next; | |
382 | ||
383 | list_for_each_entry_safe(cur, next, &cs->temp_at_states, list) { | |
384 | list_del(&cur->list); | |
385 | free_strings(cur); | |
386 | kfree(cur); | |
387 | } | |
388 | } | |
389 | ||
390 | static void gigaset_freebcs(struct bc_state *bcs) | |
391 | { | |
392 | int i; | |
393 | ||
784d5858 | 394 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->hw", bcs->channel); |
d9ba9c91 | 395 | if (!bcs->cs->ops->freebcshw(bcs)) |
784d5858 | 396 | gig_dbg(DEBUG_INIT, "failed"); |
6fd5ea63 | 397 | |
784d5858 | 398 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]->at_state", bcs->channel); |
6fd5ea63 | 399 | clear_at_state(&bcs->at_state); |
784d5858 | 400 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->skb", bcs->channel); |
2032e2c2 TS |
401 | dev_kfree_skb(bcs->skb); |
402 | bcs->skb = NULL; | |
6fd5ea63 | 403 | |
6fd5ea63 HL |
404 | for (i = 0; i < AT_NUM; ++i) { |
405 | kfree(bcs->commands[i]); | |
406 | bcs->commands[i] = NULL; | |
407 | } | |
408 | } | |
409 | ||
70440cf2 TS |
410 | static struct cardstate *alloc_cs(struct gigaset_driver *drv) |
411 | { | |
412 | unsigned long flags; | |
413 | unsigned i; | |
e468c048 | 414 | struct cardstate *cs; |
e702ff0b | 415 | struct cardstate *ret = NULL; |
70440cf2 TS |
416 | |
417 | spin_lock_irqsave(&drv->lock, flags); | |
e468c048 TS |
418 | if (drv->blocked) |
419 | goto exit; | |
70440cf2 | 420 | for (i = 0; i < drv->minors; ++i) { |
e468c048 TS |
421 | cs = drv->cs + i; |
422 | if (!(cs->flags & VALID_MINOR)) { | |
423 | cs->flags = VALID_MINOR; | |
424 | ret = cs; | |
70440cf2 | 425 | break; |
e702ff0b | 426 | } |
70440cf2 | 427 | } |
e468c048 | 428 | exit: |
70440cf2 TS |
429 | spin_unlock_irqrestore(&drv->lock, flags); |
430 | return ret; | |
431 | } | |
432 | ||
433 | static void free_cs(struct cardstate *cs) | |
434 | { | |
e468c048 | 435 | cs->flags = 0; |
70440cf2 TS |
436 | } |
437 | ||
438 | static void make_valid(struct cardstate *cs, unsigned mask) | |
439 | { | |
440 | unsigned long flags; | |
441 | struct gigaset_driver *drv = cs->driver; | |
442 | spin_lock_irqsave(&drv->lock, flags); | |
e468c048 | 443 | cs->flags |= mask; |
70440cf2 TS |
444 | spin_unlock_irqrestore(&drv->lock, flags); |
445 | } | |
446 | ||
447 | static void make_invalid(struct cardstate *cs, unsigned mask) | |
448 | { | |
449 | unsigned long flags; | |
450 | struct gigaset_driver *drv = cs->driver; | |
451 | spin_lock_irqsave(&drv->lock, flags); | |
e468c048 | 452 | cs->flags &= ~mask; |
70440cf2 TS |
453 | spin_unlock_irqrestore(&drv->lock, flags); |
454 | } | |
455 | ||
1cec9727 TS |
456 | /** |
457 | * gigaset_freecs() - free all associated ressources of a device | |
458 | * @cs: device descriptor structure. | |
459 | * | |
460 | * Stops all tasklets and timers, unregisters the device from all | |
461 | * subsystems it was registered to, deallocates the device structure | |
462 | * @cs and all structures referenced from it. | |
463 | * Operations on the device should be stopped before calling this. | |
464 | */ | |
6fd5ea63 HL |
465 | void gigaset_freecs(struct cardstate *cs) |
466 | { | |
467 | int i; | |
468 | unsigned long flags; | |
469 | ||
470 | if (!cs) | |
471 | return; | |
472 | ||
abfd1dc7 | 473 | mutex_lock(&cs->mutex); |
6fd5ea63 HL |
474 | |
475 | if (!cs->bcs) | |
476 | goto f_cs; | |
477 | if (!cs->inbuf) | |
478 | goto f_bcs; | |
479 | ||
480 | spin_lock_irqsave(&cs->lock, flags); | |
69049cc8 | 481 | cs->running = 0; |
917f5085 TS |
482 | spin_unlock_irqrestore(&cs->lock, flags); /* event handler and timer are |
483 | not rescheduled below */ | |
6fd5ea63 HL |
484 | |
485 | tasklet_kill(&cs->event_tasklet); | |
486 | del_timer_sync(&cs->timer); | |
487 | ||
488 | switch (cs->cs_init) { | |
489 | default: | |
088ec0cc TS |
490 | /* clear B channel structures */ |
491 | for (i = 0; i < cs->channels; ++i) { | |
492 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i); | |
493 | gigaset_freebcs(cs->bcs + i); | |
494 | } | |
495 | ||
3dda4e37 HL |
496 | /* clear device sysfs */ |
497 | gigaset_free_dev_sysfs(cs); | |
498 | ||
6fd5ea63 HL |
499 | gigaset_if_free(cs); |
500 | ||
784d5858 | 501 | gig_dbg(DEBUG_INIT, "clearing hw"); |
6fd5ea63 HL |
502 | cs->ops->freecshw(cs); |
503 | ||
6fd5ea63 HL |
504 | /* fall through */ |
505 | case 2: /* error in initcshw */ | |
506 | /* Deregister from LL */ | |
507 | make_invalid(cs, VALID_ID); | |
088ec0cc | 508 | gigaset_isdn_unregister(cs); |
6fd5ea63 HL |
509 | |
510 | /* fall through */ | |
088ec0cc | 511 | case 1: /* error when registering to LL */ |
784d5858 | 512 | gig_dbg(DEBUG_INIT, "clearing at_state"); |
6fd5ea63 HL |
513 | clear_at_state(&cs->at_state); |
514 | dealloc_at_states(cs); | |
515 | ||
516 | /* fall through */ | |
088ec0cc | 517 | case 0: /* error in basic setup */ |
6fd5ea63 | 518 | clear_events(cs); |
784d5858 | 519 | gig_dbg(DEBUG_INIT, "freeing inbuf"); |
6fd5ea63 HL |
520 | kfree(cs->inbuf); |
521 | } | |
784d5858 | 522 | f_bcs: gig_dbg(DEBUG_INIT, "freeing bcs[]"); |
6fd5ea63 | 523 | kfree(cs->bcs); |
784d5858 | 524 | f_cs: gig_dbg(DEBUG_INIT, "freeing cs"); |
abfd1dc7 | 525 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
526 | free_cs(cs); |
527 | } | |
528 | EXPORT_SYMBOL_GPL(gigaset_freecs); | |
529 | ||
530 | void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs, | |
784d5858 | 531 | struct cardstate *cs, int cid) |
6fd5ea63 HL |
532 | { |
533 | int i; | |
534 | ||
535 | INIT_LIST_HEAD(&at_state->list); | |
536 | at_state->waiting = 0; | |
537 | at_state->getstring = 0; | |
538 | at_state->pending_commands = 0; | |
539 | at_state->timer_expires = 0; | |
540 | at_state->timer_active = 0; | |
69049cc8 TS |
541 | at_state->timer_index = 0; |
542 | at_state->seq_index = 0; | |
6fd5ea63 HL |
543 | at_state->ConState = 0; |
544 | for (i = 0; i < STR_NUM; ++i) | |
545 | at_state->str_var[i] = NULL; | |
546 | at_state->int_var[VAR_ZDLE] = 0; | |
547 | at_state->int_var[VAR_ZCTP] = -1; | |
548 | at_state->int_var[VAR_ZSAU] = ZSAU_NULL; | |
549 | at_state->cs = cs; | |
550 | at_state->bcs = bcs; | |
551 | at_state->cid = cid; | |
552 | if (!cid) | |
553 | at_state->replystruct = cs->tabnocid; | |
554 | else | |
555 | at_state->replystruct = cs->tabcid; | |
556 | } | |
557 | ||
558 | ||
2032e2c2 | 559 | static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct cardstate *cs) |
6fd5ea63 HL |
560 | /* inbuf->read must be allocated before! */ |
561 | { | |
9d4bee2b TS |
562 | inbuf->head = 0; |
563 | inbuf->tail = 0; | |
6fd5ea63 | 564 | inbuf->cs = cs; |
2032e2c2 | 565 | inbuf->inputstate = INS_command; |
6fd5ea63 HL |
566 | } |
567 | ||
1cec9727 TS |
568 | /** |
569 | * gigaset_fill_inbuf() - append received data to input buffer | |
570 | * @inbuf: buffer structure. | |
571 | * @src: received data. | |
572 | * @numbytes: number of bytes received. | |
573 | */ | |
714e8236 TS |
574 | int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src, |
575 | unsigned numbytes) | |
576 | { | |
577 | unsigned n, head, tail, bytesleft; | |
578 | ||
579 | gig_dbg(DEBUG_INTR, "received %u bytes", numbytes); | |
580 | ||
581 | if (!numbytes) | |
582 | return 0; | |
583 | ||
584 | bytesleft = numbytes; | |
9d4bee2b TS |
585 | tail = inbuf->tail; |
586 | head = inbuf->head; | |
714e8236 TS |
587 | gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail); |
588 | ||
589 | while (bytesleft) { | |
590 | if (head > tail) | |
591 | n = head - 1 - tail; | |
592 | else if (head == 0) | |
593 | n = (RBUFSIZE-1) - tail; | |
594 | else | |
595 | n = RBUFSIZE - tail; | |
596 | if (!n) { | |
597 | dev_err(inbuf->cs->dev, | |
898eb71c JP |
598 | "buffer overflow (%u bytes lost)\n", |
599 | bytesleft); | |
714e8236 TS |
600 | break; |
601 | } | |
602 | if (n > bytesleft) | |
603 | n = bytesleft; | |
604 | memcpy(inbuf->data + tail, src, n); | |
605 | bytesleft -= n; | |
606 | tail = (tail + n) % RBUFSIZE; | |
607 | src += n; | |
608 | } | |
609 | gig_dbg(DEBUG_INTR, "setting tail to %u", tail); | |
9d4bee2b | 610 | inbuf->tail = tail; |
714e8236 TS |
611 | return numbytes != bytesleft; |
612 | } | |
613 | EXPORT_SYMBOL_GPL(gigaset_fill_inbuf); | |
614 | ||
6fd5ea63 HL |
615 | /* Initialize the b-channel structure */ |
616 | static struct bc_state *gigaset_initbcs(struct bc_state *bcs, | |
784d5858 | 617 | struct cardstate *cs, int channel) |
6fd5ea63 HL |
618 | { |
619 | int i; | |
620 | ||
d9ba9c91 | 621 | bcs->tx_skb = NULL; |
6fd5ea63 HL |
622 | |
623 | skb_queue_head_init(&bcs->squeue); | |
624 | ||
625 | bcs->corrupted = 0; | |
626 | bcs->trans_down = 0; | |
627 | bcs->trans_up = 0; | |
628 | ||
784d5858 | 629 | gig_dbg(DEBUG_INIT, "setting up bcs[%d]->at_state", channel); |
6fd5ea63 HL |
630 | gigaset_at_init(&bcs->at_state, bcs, cs, -1); |
631 | ||
6fd5ea63 HL |
632 | #ifdef CONFIG_GIGASET_DEBUG |
633 | bcs->emptycount = 0; | |
634 | #endif | |
635 | ||
784d5858 | 636 | gig_dbg(DEBUG_INIT, "allocating bcs[%d]->skb", channel); |
6fd5ea63 HL |
637 | bcs->fcs = PPP_INITFCS; |
638 | bcs->inputstate = 0; | |
639 | if (cs->ignoreframes) { | |
6fd5ea63 | 640 | bcs->skb = NULL; |
088ec0cc TS |
641 | } else { |
642 | bcs->skb = dev_alloc_skb(SBUFSIZE + cs->hw_hdr_len); | |
643 | if (bcs->skb != NULL) | |
644 | skb_reserve(bcs->skb, cs->hw_hdr_len); | |
2032e2c2 | 645 | else |
088ec0cc | 646 | pr_err("out of memory\n"); |
6fd5ea63 HL |
647 | } |
648 | ||
649 | bcs->channel = channel; | |
650 | bcs->cs = cs; | |
651 | ||
652 | bcs->chstate = 0; | |
653 | bcs->use_count = 1; | |
654 | bcs->busy = 0; | |
655 | bcs->ignore = cs->ignoreframes; | |
656 | ||
657 | for (i = 0; i < AT_NUM; ++i) | |
658 | bcs->commands[i] = NULL; | |
659 | ||
784d5858 | 660 | gig_dbg(DEBUG_INIT, " setting up bcs[%d]->hw", channel); |
6fd5ea63 HL |
661 | if (cs->ops->initbcshw(bcs)) |
662 | return bcs; | |
663 | ||
784d5858 | 664 | gig_dbg(DEBUG_INIT, " failed"); |
6fd5ea63 | 665 | |
784d5858 | 666 | gig_dbg(DEBUG_INIT, " freeing bcs[%d]->skb", channel); |
2032e2c2 TS |
667 | dev_kfree_skb(bcs->skb); |
668 | bcs->skb = NULL; | |
6fd5ea63 HL |
669 | |
670 | return NULL; | |
671 | } | |
672 | ||
1cec9727 TS |
673 | /** |
674 | * gigaset_initcs() - initialize device structure | |
675 | * @drv: hardware driver the device belongs to | |
676 | * @channels: number of B channels supported by device | |
677 | * @onechannel: !=0 if B channel data and AT commands share one | |
678 | * communication channel (M10x), | |
679 | * ==0 if B channels have separate communication channels (base) | |
680 | * @ignoreframes: number of frames to ignore after setting up B channel | |
681 | * @cidmode: !=0: start in CallID mode | |
682 | * @modulename: name of driver module for LL registration | |
683 | * | |
6fd5ea63 HL |
684 | * Allocate and initialize cardstate structure for Gigaset driver |
685 | * Calls hardware dependent gigaset_initcshw() function | |
686 | * Calls B channel initialization function gigaset_initbcs() for each B channel | |
1cec9727 TS |
687 | * |
688 | * Return value: | |
6fd5ea63 HL |
689 | * pointer to cardstate structure |
690 | */ | |
691 | struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels, | |
692 | int onechannel, int ignoreframes, | |
693 | int cidmode, const char *modulename) | |
694 | { | |
d9ba9c91 | 695 | struct cardstate *cs; |
69049cc8 | 696 | unsigned long flags; |
6fd5ea63 HL |
697 | int i; |
698 | ||
784d5858 | 699 | gig_dbg(DEBUG_INIT, "allocating cs"); |
d9ba9c91 TS |
700 | cs = alloc_cs(drv); |
701 | if (!cs) { | |
c8770dca | 702 | pr_err("maximum number of devices exceeded\n"); |
e702ff0b TS |
703 | return NULL; |
704 | } | |
e702ff0b | 705 | |
784d5858 | 706 | gig_dbg(DEBUG_INIT, "allocating bcs[0..%d]", channels - 1); |
6fd5ea63 | 707 | cs->bcs = kmalloc(channels * sizeof(struct bc_state), GFP_KERNEL); |
e702ff0b | 708 | if (!cs->bcs) { |
c8770dca | 709 | pr_err("out of memory\n"); |
6fd5ea63 | 710 | goto error; |
e702ff0b | 711 | } |
784d5858 | 712 | gig_dbg(DEBUG_INIT, "allocating inbuf"); |
6fd5ea63 | 713 | cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL); |
e702ff0b | 714 | if (!cs->inbuf) { |
c8770dca | 715 | pr_err("out of memory\n"); |
6fd5ea63 | 716 | goto error; |
e702ff0b | 717 | } |
6fd5ea63 HL |
718 | |
719 | cs->cs_init = 0; | |
720 | cs->channels = channels; | |
721 | cs->onechannel = onechannel; | |
722 | cs->ignoreframes = ignoreframes; | |
723 | INIT_LIST_HEAD(&cs->temp_at_states); | |
69049cc8 | 724 | cs->running = 0; |
6fd5ea63 HL |
725 | init_timer(&cs->timer); /* clear next & prev */ |
726 | spin_lock_init(&cs->ev_lock); | |
69049cc8 TS |
727 | cs->ev_tail = 0; |
728 | cs->ev_head = 0; | |
abfd1dc7 | 729 | |
5452fee2 | 730 | tasklet_init(&cs->event_tasklet, gigaset_handle_event, |
917f5085 | 731 | (unsigned long) cs); |
9d4bee2b | 732 | cs->commands_pending = 0; |
6fd5ea63 HL |
733 | cs->cur_at_seq = 0; |
734 | cs->gotfwver = -1; | |
735 | cs->open_count = 0; | |
784d5858 | 736 | cs->dev = NULL; |
6fd5ea63 | 737 | cs->tty = NULL; |
01107d34 | 738 | cs->tty_dev = NULL; |
69049cc8 | 739 | cs->cidmode = cidmode != 0; |
528efc6a TS |
740 | cs->tabnocid = gigaset_tab_nocid; |
741 | cs->tabcid = gigaset_tab_cid; | |
6fd5ea63 HL |
742 | |
743 | init_waitqueue_head(&cs->waitqueue); | |
744 | cs->waiting = 0; | |
745 | ||
9d4bee2b TS |
746 | cs->mode = M_UNKNOWN; |
747 | cs->mstate = MS_UNINITIALIZED; | |
6fd5ea63 | 748 | |
6fd5ea63 HL |
749 | ++cs->cs_init; |
750 | ||
784d5858 | 751 | gig_dbg(DEBUG_INIT, "setting up at_state"); |
6fd5ea63 HL |
752 | spin_lock_init(&cs->lock); |
753 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
754 | cs->dle = 0; | |
755 | cs->cbytes = 0; | |
756 | ||
784d5858 | 757 | gig_dbg(DEBUG_INIT, "setting up inbuf"); |
2032e2c2 | 758 | gigaset_inbuf_init(cs->inbuf, cs); |
6fd5ea63 | 759 | |
69049cc8 TS |
760 | cs->connected = 0; |
761 | cs->isdn_up = 0; | |
6fd5ea63 | 762 | |
784d5858 | 763 | gig_dbg(DEBUG_INIT, "setting up cmdbuf"); |
6fd5ea63 HL |
764 | cs->cmdbuf = cs->lastcmdbuf = NULL; |
765 | spin_lock_init(&cs->cmdlock); | |
766 | cs->curlen = 0; | |
767 | cs->cmdbytes = 0; | |
768 | ||
784d5858 | 769 | gig_dbg(DEBUG_INIT, "setting up iif"); |
088ec0cc | 770 | if (!gigaset_isdn_register(cs, modulename)) { |
c8770dca | 771 | pr_err("error registering ISDN device\n"); |
6fd5ea63 HL |
772 | goto error; |
773 | } | |
774 | ||
775 | make_valid(cs, VALID_ID); | |
776 | ++cs->cs_init; | |
784d5858 | 777 | gig_dbg(DEBUG_INIT, "setting up hw"); |
c8770dca | 778 | if (!cs->ops->initcshw(cs)) |
6fd5ea63 HL |
779 | goto error; |
780 | ||
781 | ++cs->cs_init; | |
782 | ||
7435f50e | 783 | /* set up character device */ |
6fd5ea63 HL |
784 | gigaset_if_init(cs); |
785 | ||
3dda4e37 HL |
786 | /* set up device sysfs */ |
787 | gigaset_init_dev_sysfs(cs); | |
788 | ||
088ec0cc TS |
789 | /* set up channel data structures */ |
790 | for (i = 0; i < channels; ++i) { | |
791 | gig_dbg(DEBUG_INIT, "setting up bcs[%d]", i); | |
792 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) { | |
793 | pr_err("could not allocate channel %d data\n", i); | |
794 | goto error; | |
795 | } | |
796 | } | |
797 | ||
69049cc8 TS |
798 | spin_lock_irqsave(&cs->lock, flags); |
799 | cs->running = 1; | |
800 | spin_unlock_irqrestore(&cs->lock, flags); | |
ec81b5e6 TS |
801 | setup_timer(&cs->timer, timer_tick, (unsigned long) cs); |
802 | cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK); | |
6fd5ea63 HL |
803 | /* FIXME: can jiffies increase too much until the timer is added? |
804 | * Same problem(?) with mod_timer() in timer_tick(). */ | |
805 | add_timer(&cs->timer); | |
806 | ||
784d5858 | 807 | gig_dbg(DEBUG_INIT, "cs initialized"); |
6fd5ea63 HL |
808 | return cs; |
809 | ||
e702ff0b | 810 | error: |
784d5858 | 811 | gig_dbg(DEBUG_INIT, "failed"); |
6fd5ea63 HL |
812 | gigaset_freecs(cs); |
813 | return NULL; | |
814 | } | |
815 | EXPORT_SYMBOL_GPL(gigaset_initcs); | |
816 | ||
73a88814 | 817 | /* ReInitialize the b-channel structure on hangup */ |
6fd5ea63 HL |
818 | void gigaset_bcs_reinit(struct bc_state *bcs) |
819 | { | |
820 | struct sk_buff *skb; | |
821 | struct cardstate *cs = bcs->cs; | |
822 | unsigned long flags; | |
823 | ||
824 | while ((skb = skb_dequeue(&bcs->squeue)) != NULL) | |
825 | dev_kfree_skb(skb); | |
826 | ||
917f5085 | 827 | spin_lock_irqsave(&cs->lock, flags); |
6fd5ea63 HL |
828 | clear_at_state(&bcs->at_state); |
829 | bcs->at_state.ConState = 0; | |
830 | bcs->at_state.timer_active = 0; | |
831 | bcs->at_state.timer_expires = 0; | |
784d5858 | 832 | bcs->at_state.cid = -1; /* No CID defined */ |
6fd5ea63 HL |
833 | spin_unlock_irqrestore(&cs->lock, flags); |
834 | ||
835 | bcs->inputstate = 0; | |
836 | ||
837 | #ifdef CONFIG_GIGASET_DEBUG | |
838 | bcs->emptycount = 0; | |
839 | #endif | |
840 | ||
841 | bcs->fcs = PPP_INITFCS; | |
842 | bcs->chstate = 0; | |
843 | ||
844 | bcs->ignore = cs->ignoreframes; | |
2032e2c2 TS |
845 | if (bcs->ignore) { |
846 | dev_kfree_skb(bcs->skb); | |
847 | bcs->skb = NULL; | |
848 | } | |
6fd5ea63 HL |
849 | |
850 | cs->ops->reinitbcshw(bcs); | |
851 | } | |
852 | ||
853 | static void cleanup_cs(struct cardstate *cs) | |
854 | { | |
855 | struct cmdbuf_t *cb, *tcb; | |
856 | int i; | |
857 | unsigned long flags; | |
858 | ||
859 | spin_lock_irqsave(&cs->lock, flags); | |
860 | ||
9d4bee2b TS |
861 | cs->mode = M_UNKNOWN; |
862 | cs->mstate = MS_UNINITIALIZED; | |
6fd5ea63 HL |
863 | |
864 | clear_at_state(&cs->at_state); | |
865 | dealloc_at_states(cs); | |
866 | free_strings(&cs->at_state); | |
867 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
868 | ||
6fd5ea63 | 869 | cs->inbuf->inputstate = INS_command; |
9d4bee2b TS |
870 | cs->inbuf->head = 0; |
871 | cs->inbuf->tail = 0; | |
6fd5ea63 HL |
872 | |
873 | cb = cs->cmdbuf; | |
874 | while (cb) { | |
875 | tcb = cb; | |
876 | cb = cb->next; | |
877 | kfree(tcb); | |
878 | } | |
879 | cs->cmdbuf = cs->lastcmdbuf = NULL; | |
880 | cs->curlen = 0; | |
881 | cs->cmdbytes = 0; | |
882 | cs->gotfwver = -1; | |
883 | cs->dle = 0; | |
884 | cs->cur_at_seq = 0; | |
9d4bee2b | 885 | cs->commands_pending = 0; |
6fd5ea63 HL |
886 | cs->cbytes = 0; |
887 | ||
888 | spin_unlock_irqrestore(&cs->lock, flags); | |
889 | ||
890 | for (i = 0; i < cs->channels; ++i) { | |
891 | gigaset_freebcs(cs->bcs + i); | |
892 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) | |
c8770dca | 893 | pr_err("could not allocate channel %d data\n", i); |
6fd5ea63 HL |
894 | } |
895 | ||
896 | if (cs->waiting) { | |
897 | cs->cmd_result = -ENODEV; | |
898 | cs->waiting = 0; | |
899 | wake_up_interruptible(&cs->waitqueue); | |
900 | } | |
901 | } | |
902 | ||
903 | ||
1cec9727 TS |
904 | /** |
905 | * gigaset_start() - start device operations | |
906 | * @cs: device descriptor structure. | |
907 | * | |
908 | * Prepares the device for use by setting up communication parameters, | |
909 | * scheduling an EV_START event to initiate device initialization, and | |
910 | * waiting for completion of the initialization. | |
911 | * | |
912 | * Return value: | |
913 | * 1 - success, 0 - error | |
914 | */ | |
6fd5ea63 HL |
915 | int gigaset_start(struct cardstate *cs) |
916 | { | |
69049cc8 TS |
917 | unsigned long flags; |
918 | ||
abfd1dc7 | 919 | if (mutex_lock_interruptible(&cs->mutex)) |
6fd5ea63 | 920 | return 0; |
6fd5ea63 | 921 | |
69049cc8 TS |
922 | spin_lock_irqsave(&cs->lock, flags); |
923 | cs->connected = 1; | |
924 | spin_unlock_irqrestore(&cs->lock, flags); | |
6fd5ea63 | 925 | |
9d4bee2b | 926 | if (cs->mstate != MS_LOCKED) { |
6fd5ea63 HL |
927 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR|TIOCM_RTS); |
928 | cs->ops->baud_rate(cs, B115200); | |
929 | cs->ops->set_line_ctrl(cs, CS8); | |
930 | cs->control_state = TIOCM_DTR|TIOCM_RTS; | |
6fd5ea63 HL |
931 | } |
932 | ||
933 | cs->waiting = 1; | |
934 | ||
935 | if (!gigaset_add_event(cs, &cs->at_state, EV_START, NULL, 0, NULL)) { | |
936 | cs->waiting = 0; | |
d9ba9c91 | 937 | dev_err(cs->dev, "%s: out of memory\n", __func__); |
6fd5ea63 HL |
938 | goto error; |
939 | } | |
940 | ||
784d5858 | 941 | gig_dbg(DEBUG_CMD, "scheduling START"); |
6fd5ea63 HL |
942 | gigaset_schedule_event(cs); |
943 | ||
944 | wait_event(cs->waitqueue, !cs->waiting); | |
945 | ||
abfd1dc7 | 946 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
947 | return 1; |
948 | ||
949 | error: | |
abfd1dc7 | 950 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
951 | return 0; |
952 | } | |
953 | EXPORT_SYMBOL_GPL(gigaset_start); | |
954 | ||
1cec9727 TS |
955 | /** |
956 | * gigaset_shutdown() - shut down device operations | |
957 | * @cs: device descriptor structure. | |
958 | * | |
959 | * Deactivates the device by scheduling an EV_SHUTDOWN event and | |
960 | * waiting for completion of the shutdown. | |
961 | * | |
962 | * Return value: | |
963 | * 0 - success, -1 - error (no device associated) | |
e468c048 TS |
964 | */ |
965 | int gigaset_shutdown(struct cardstate *cs) | |
6fd5ea63 | 966 | { |
abfd1dc7 | 967 | mutex_lock(&cs->mutex); |
6fd5ea63 | 968 | |
5d49c101 TS |
969 | if (!(cs->flags & VALID_MINOR)) { |
970 | mutex_unlock(&cs->mutex); | |
e468c048 | 971 | return -1; |
5d49c101 | 972 | } |
e468c048 | 973 | |
6fd5ea63 HL |
974 | cs->waiting = 1; |
975 | ||
976 | if (!gigaset_add_event(cs, &cs->at_state, EV_SHUTDOWN, NULL, 0, NULL)) { | |
d9ba9c91 | 977 | dev_err(cs->dev, "%s: out of memory\n", __func__); |
6fd5ea63 HL |
978 | goto exit; |
979 | } | |
980 | ||
784d5858 | 981 | gig_dbg(DEBUG_CMD, "scheduling SHUTDOWN"); |
6fd5ea63 HL |
982 | gigaset_schedule_event(cs); |
983 | ||
2869b23e | 984 | wait_event(cs->waitqueue, !cs->waiting); |
6fd5ea63 HL |
985 | |
986 | cleanup_cs(cs); | |
987 | ||
988 | exit: | |
abfd1dc7 | 989 | mutex_unlock(&cs->mutex); |
e468c048 | 990 | return 0; |
6fd5ea63 HL |
991 | } |
992 | EXPORT_SYMBOL_GPL(gigaset_shutdown); | |
993 | ||
1cec9727 TS |
994 | /** |
995 | * gigaset_stop() - stop device operations | |
996 | * @cs: device descriptor structure. | |
997 | * | |
998 | * Stops operations on the device by scheduling an EV_STOP event and | |
999 | * waiting for completion of the shutdown. | |
1000 | */ | |
6fd5ea63 HL |
1001 | void gigaset_stop(struct cardstate *cs) |
1002 | { | |
abfd1dc7 | 1003 | mutex_lock(&cs->mutex); |
6fd5ea63 | 1004 | |
6fd5ea63 HL |
1005 | cs->waiting = 1; |
1006 | ||
1007 | if (!gigaset_add_event(cs, &cs->at_state, EV_STOP, NULL, 0, NULL)) { | |
d9ba9c91 | 1008 | dev_err(cs->dev, "%s: out of memory\n", __func__); |
6fd5ea63 HL |
1009 | goto exit; |
1010 | } | |
1011 | ||
784d5858 | 1012 | gig_dbg(DEBUG_CMD, "scheduling STOP"); |
6fd5ea63 HL |
1013 | gigaset_schedule_event(cs); |
1014 | ||
2869b23e | 1015 | wait_event(cs->waitqueue, !cs->waiting); |
6fd5ea63 | 1016 | |
6fd5ea63 HL |
1017 | cleanup_cs(cs); |
1018 | ||
1019 | exit: | |
abfd1dc7 | 1020 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
1021 | } |
1022 | EXPORT_SYMBOL_GPL(gigaset_stop); | |
1023 | ||
1024 | static LIST_HEAD(drivers); | |
34af946a | 1025 | static DEFINE_SPINLOCK(driver_lock); |
6fd5ea63 HL |
1026 | |
1027 | struct cardstate *gigaset_get_cs_by_id(int id) | |
1028 | { | |
1029 | unsigned long flags; | |
35dc8457 TS |
1030 | struct cardstate *ret = NULL; |
1031 | struct cardstate *cs; | |
6fd5ea63 HL |
1032 | struct gigaset_driver *drv; |
1033 | unsigned i; | |
1034 | ||
1035 | spin_lock_irqsave(&driver_lock, flags); | |
1036 | list_for_each_entry(drv, &drivers, list) { | |
1037 | spin_lock(&drv->lock); | |
1038 | for (i = 0; i < drv->minors; ++i) { | |
e468c048 TS |
1039 | cs = drv->cs + i; |
1040 | if ((cs->flags & VALID_ID) && cs->myid == id) { | |
1041 | ret = cs; | |
6fd5ea63 | 1042 | break; |
e468c048 | 1043 | } |
6fd5ea63 HL |
1044 | } |
1045 | spin_unlock(&drv->lock); | |
1046 | if (ret) | |
1047 | break; | |
1048 | } | |
1049 | spin_unlock_irqrestore(&driver_lock, flags); | |
1050 | return ret; | |
1051 | } | |
1052 | ||
1053 | void gigaset_debugdrivers(void) | |
1054 | { | |
1055 | unsigned long flags; | |
1056 | static struct cardstate *cs; | |
1057 | struct gigaset_driver *drv; | |
1058 | unsigned i; | |
1059 | ||
1060 | spin_lock_irqsave(&driver_lock, flags); | |
1061 | list_for_each_entry(drv, &drivers, list) { | |
784d5858 | 1062 | gig_dbg(DEBUG_DRIVER, "driver %p", drv); |
6fd5ea63 HL |
1063 | spin_lock(&drv->lock); |
1064 | for (i = 0; i < drv->minors; ++i) { | |
784d5858 | 1065 | gig_dbg(DEBUG_DRIVER, " index %u", i); |
6fd5ea63 | 1066 | cs = drv->cs + i; |
784d5858 | 1067 | gig_dbg(DEBUG_DRIVER, " cardstate %p", cs); |
e468c048 | 1068 | gig_dbg(DEBUG_DRIVER, " flags 0x%02x", cs->flags); |
784d5858 TS |
1069 | gig_dbg(DEBUG_DRIVER, " minor_index %u", |
1070 | cs->minor_index); | |
1071 | gig_dbg(DEBUG_DRIVER, " driver %p", cs->driver); | |
1072 | gig_dbg(DEBUG_DRIVER, " i4l id %d", cs->myid); | |
6fd5ea63 HL |
1073 | } |
1074 | spin_unlock(&drv->lock); | |
1075 | } | |
1076 | spin_unlock_irqrestore(&driver_lock, flags); | |
1077 | } | |
6fd5ea63 | 1078 | |
8ca445df | 1079 | static struct cardstate *gigaset_get_cs_by_minor(unsigned minor) |
6fd5ea63 HL |
1080 | { |
1081 | unsigned long flags; | |
35dc8457 | 1082 | struct cardstate *ret = NULL; |
6fd5ea63 HL |
1083 | struct gigaset_driver *drv; |
1084 | unsigned index; | |
1085 | ||
1086 | spin_lock_irqsave(&driver_lock, flags); | |
1087 | list_for_each_entry(drv, &drivers, list) { | |
1088 | if (minor < drv->minor || minor >= drv->minor + drv->minors) | |
1089 | continue; | |
1090 | index = minor - drv->minor; | |
1091 | spin_lock(&drv->lock); | |
e468c048 | 1092 | if (drv->cs[index].flags & VALID_MINOR) |
6fd5ea63 HL |
1093 | ret = drv->cs + index; |
1094 | spin_unlock(&drv->lock); | |
1095 | if (ret) | |
1096 | break; | |
1097 | } | |
1098 | spin_unlock_irqrestore(&driver_lock, flags); | |
1099 | return ret; | |
1100 | } | |
1101 | ||
8ca445df AB |
1102 | struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty) |
1103 | { | |
1104 | if (tty->index < 0 || tty->index >= tty->driver->num) | |
1105 | return NULL; | |
1106 | return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start); | |
1107 | } | |
1108 | ||
1cec9727 TS |
1109 | /** |
1110 | * gigaset_freedriver() - free all associated ressources of a driver | |
1111 | * @drv: driver descriptor structure. | |
1112 | * | |
1113 | * Unregisters the driver from the system and deallocates the driver | |
1114 | * structure @drv and all structures referenced from it. | |
1115 | * All devices should be shut down before calling this. | |
1116 | */ | |
6fd5ea63 HL |
1117 | void gigaset_freedriver(struct gigaset_driver *drv) |
1118 | { | |
1119 | unsigned long flags; | |
1120 | ||
1121 | spin_lock_irqsave(&driver_lock, flags); | |
1122 | list_del(&drv->list); | |
1123 | spin_unlock_irqrestore(&driver_lock, flags); | |
1124 | ||
1125 | gigaset_if_freedriver(drv); | |
6fd5ea63 HL |
1126 | |
1127 | kfree(drv->cs); | |
6fd5ea63 HL |
1128 | kfree(drv); |
1129 | } | |
1130 | EXPORT_SYMBOL_GPL(gigaset_freedriver); | |
1131 | ||
1cec9727 TS |
1132 | /** |
1133 | * gigaset_initdriver() - initialize driver structure | |
1134 | * @minor: First minor number | |
1135 | * @minors: Number of minors this driver can handle | |
1136 | * @procname: Name of the driver | |
1137 | * @devname: Name of the device files (prefix without minor number) | |
1138 | * | |
6fd5ea63 | 1139 | * Allocate and initialize gigaset_driver structure. Initialize interface. |
1cec9727 TS |
1140 | * |
1141 | * Return value: | |
784d5858 | 1142 | * Pointer to the gigaset_driver structure on success, NULL on failure. |
6fd5ea63 HL |
1143 | */ |
1144 | struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors, | |
784d5858 TS |
1145 | const char *procname, |
1146 | const char *devname, | |
784d5858 TS |
1147 | const struct gigaset_ops *ops, |
1148 | struct module *owner) | |
6fd5ea63 HL |
1149 | { |
1150 | struct gigaset_driver *drv; | |
1151 | unsigned long flags; | |
1152 | unsigned i; | |
1153 | ||
1154 | drv = kmalloc(sizeof *drv, GFP_KERNEL); | |
1155 | if (!drv) | |
1156 | return NULL; | |
f4675c70 | 1157 | |
6fd5ea63 HL |
1158 | drv->have_tty = 0; |
1159 | drv->minor = minor; | |
1160 | drv->minors = minors; | |
1161 | spin_lock_init(&drv->lock); | |
1162 | drv->blocked = 0; | |
1163 | drv->ops = ops; | |
1164 | drv->owner = owner; | |
1165 | INIT_LIST_HEAD(&drv->list); | |
1166 | ||
1167 | drv->cs = kmalloc(minors * sizeof *drv->cs, GFP_KERNEL); | |
1168 | if (!drv->cs) | |
e702ff0b | 1169 | goto error; |
f4675c70 | 1170 | |
6fd5ea63 | 1171 | for (i = 0; i < minors; ++i) { |
e468c048 | 1172 | drv->cs[i].flags = 0; |
6fd5ea63 HL |
1173 | drv->cs[i].driver = drv; |
1174 | drv->cs[i].ops = drv->ops; | |
1175 | drv->cs[i].minor_index = i; | |
5d49c101 | 1176 | mutex_init(&drv->cs[i].mutex); |
6fd5ea63 HL |
1177 | } |
1178 | ||
f4eaa370 | 1179 | gigaset_if_initdriver(drv, procname, devname); |
6fd5ea63 HL |
1180 | |
1181 | spin_lock_irqsave(&driver_lock, flags); | |
1182 | list_add(&drv->list, &drivers); | |
1183 | spin_unlock_irqrestore(&driver_lock, flags); | |
1184 | ||
1185 | return drv; | |
1186 | ||
e702ff0b | 1187 | error: |
6fd5ea63 | 1188 | kfree(drv->cs); |
6fd5ea63 | 1189 | kfree(drv); |
6fd5ea63 HL |
1190 | return NULL; |
1191 | } | |
1192 | EXPORT_SYMBOL_GPL(gigaset_initdriver); | |
1193 | ||
1cec9727 TS |
1194 | /** |
1195 | * gigaset_blockdriver() - block driver | |
1196 | * @drv: driver descriptor structure. | |
1197 | * | |
1198 | * Prevents the driver from attaching new devices, in preparation for | |
1199 | * deregistration. | |
1200 | */ | |
6fd5ea63 HL |
1201 | void gigaset_blockdriver(struct gigaset_driver *drv) |
1202 | { | |
6fd5ea63 | 1203 | drv->blocked = 1; |
6fd5ea63 HL |
1204 | } |
1205 | EXPORT_SYMBOL_GPL(gigaset_blockdriver); | |
1206 | ||
1207 | static int __init gigaset_init_module(void) | |
1208 | { | |
1209 | /* in accordance with the principle of least astonishment, | |
1210 | * setting the 'debug' parameter to 1 activates a sensible | |
1211 | * set of default debug levels | |
1212 | */ | |
1213 | if (gigaset_debuglevel == 1) | |
1214 | gigaset_debuglevel = DEBUG_DEFAULT; | |
1215 | ||
2038724c | 1216 | pr_info(DRIVER_DESC DRIVER_DESC_DEBUG "\n"); |
6fd5ea63 HL |
1217 | return 0; |
1218 | } | |
1219 | ||
1220 | static void __exit gigaset_exit_module(void) | |
1221 | { | |
1222 | } | |
1223 | ||
1224 | module_init(gigaset_init_module); | |
1225 | module_exit(gigaset_exit_module); | |
1226 | ||
1227 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1228 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1229 | ||
1230 | MODULE_LICENSE("GPL"); |