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" | |
6fd5ea63 HL |
17 | #include <linux/module.h> |
18 | #include <linux/moduleparam.h> | |
19 | ||
20 | /* Version Information */ | |
70440cf2 | 21 | #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Tilman Schmidt <tilman@imap.cc>, Stefan Eilers" |
6fd5ea63 HL |
22 | #define DRIVER_DESC "Driver for Gigaset 307x" |
23 | ||
2038724c TS |
24 | #ifdef CONFIG_GIGASET_DEBUG |
25 | #define DRIVER_DESC_DEBUG " (debug build)" | |
26 | #else | |
27 | #define DRIVER_DESC_DEBUG "" | |
28 | #endif | |
29 | ||
6fd5ea63 | 30 | /* Module parameters */ |
073886ff | 31 | int gigaset_debuglevel; |
6fd5ea63 | 32 | EXPORT_SYMBOL_GPL(gigaset_debuglevel); |
475be4d8 | 33 | module_param_named(debug, gigaset_debuglevel, int, S_IRUGO | S_IWUSR); |
6fd5ea63 HL |
34 | MODULE_PARM_DESC(debug, "debug level"); |
35 | ||
70440cf2 | 36 | /* driver state flags */ |
784d5858 TS |
37 | #define VALID_MINOR 0x01 |
38 | #define VALID_ID 0x02 | |
6fd5ea63 | 39 | |
1cec9727 TS |
40 | /** |
41 | * gigaset_dbg_buffer() - dump data in ASCII and hex for debugging | |
42 | * @level: debugging level. | |
43 | * @msg: message prefix. | |
44 | * @len: number of bytes to dump. | |
45 | * @buf: data to dump. | |
46 | * | |
47 | * If the current debugging level includes one of the bits set in @level, | |
48 | * @len bytes starting at @buf are logged to dmesg at KERN_DEBUG prio, | |
49 | * prefixed by the text @msg. | |
50 | */ | |
6fd5ea63 | 51 | void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg, |
01371500 | 52 | size_t len, const unsigned char *buf) |
6fd5ea63 HL |
53 | { |
54 | unsigned char outbuf[80]; | |
784d5858 | 55 | unsigned char c; |
6fd5ea63 HL |
56 | size_t space = sizeof outbuf - 1; |
57 | unsigned char *out = outbuf; | |
01371500 | 58 | size_t numin = len; |
6fd5ea63 | 59 | |
01371500 | 60 | while (numin--) { |
784d5858 TS |
61 | c = *buf++; |
62 | if (c == '~' || c == '^' || c == '\\') { | |
01371500 | 63 | if (!space--) |
784d5858 TS |
64 | break; |
65 | *out++ = '\\'; | |
66 | } | |
67 | if (c & 0x80) { | |
01371500 | 68 | if (!space--) |
784d5858 TS |
69 | break; |
70 | *out++ = '~'; | |
71 | c ^= 0x80; | |
72 | } | |
73 | if (c < 0x20 || c == 0x7f) { | |
01371500 | 74 | if (!space--) |
784d5858 | 75 | break; |
6fd5ea63 | 76 | *out++ = '^'; |
784d5858 | 77 | c ^= 0x40; |
6fd5ea63 | 78 | } |
01371500 | 79 | if (!space--) |
784d5858 TS |
80 | break; |
81 | *out++ = c; | |
6fd5ea63 HL |
82 | } |
83 | *out = 0; | |
84 | ||
784d5858 | 85 | gig_dbg(level, "%s (%u bytes): %s", msg, (unsigned) len, outbuf); |
6fd5ea63 HL |
86 | } |
87 | EXPORT_SYMBOL_GPL(gigaset_dbg_buffer); | |
88 | ||
89 | static int setflags(struct cardstate *cs, unsigned flags, unsigned delay) | |
90 | { | |
91 | int r; | |
92 | ||
93 | r = cs->ops->set_modem_ctrl(cs, cs->control_state, flags); | |
94 | cs->control_state = flags; | |
95 | if (r < 0) | |
96 | return r; | |
97 | ||
98 | if (delay) { | |
99 | set_current_state(TASK_INTERRUPTIBLE); | |
100 | schedule_timeout(delay * HZ / 1000); | |
101 | } | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
106 | int gigaset_enterconfigmode(struct cardstate *cs) | |
107 | { | |
108 | int i, r; | |
109 | ||
d9ba9c91 | 110 | cs->control_state = TIOCM_RTS; |
6fd5ea63 HL |
111 | |
112 | r = setflags(cs, TIOCM_DTR, 200); | |
113 | if (r < 0) | |
114 | goto error; | |
115 | r = setflags(cs, 0, 200); | |
116 | if (r < 0) | |
117 | goto error; | |
118 | for (i = 0; i < 5; ++i) { | |
119 | r = setflags(cs, TIOCM_RTS, 100); | |
120 | if (r < 0) | |
121 | goto error; | |
122 | r = setflags(cs, 0, 100); | |
123 | if (r < 0) | |
124 | goto error; | |
125 | } | |
475be4d8 | 126 | r = setflags(cs, TIOCM_RTS | TIOCM_DTR, 800); |
6fd5ea63 HL |
127 | if (r < 0) |
128 | goto error; | |
129 | ||
130 | return 0; | |
131 | ||
132 | error: | |
784d5858 | 133 | dev_err(cs->dev, "error %d on setuartbits\n", -r); |
475be4d8 JP |
134 | cs->control_state = TIOCM_RTS | TIOCM_DTR; |
135 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_RTS | TIOCM_DTR); | |
6fd5ea63 | 136 | |
d9ba9c91 | 137 | return -1; |
6fd5ea63 HL |
138 | } |
139 | ||
140 | static int test_timeout(struct at_state_t *at_state) | |
141 | { | |
142 | if (!at_state->timer_expires) | |
143 | return 0; | |
144 | ||
145 | if (--at_state->timer_expires) { | |
784d5858 TS |
146 | gig_dbg(DEBUG_MCMD, "decreased timer of %p to %lu", |
147 | at_state, at_state->timer_expires); | |
6fd5ea63 HL |
148 | return 0; |
149 | } | |
150 | ||
1528b18f TS |
151 | gigaset_add_event(at_state->cs, at_state, EV_TIMEOUT, NULL, |
152 | at_state->timer_index, NULL); | |
6fd5ea63 HL |
153 | return 1; |
154 | } | |
155 | ||
156 | static void timer_tick(unsigned long data) | |
157 | { | |
158 | struct cardstate *cs = (struct cardstate *) data; | |
159 | unsigned long flags; | |
160 | unsigned channel; | |
161 | struct at_state_t *at_state; | |
162 | int timeout = 0; | |
163 | ||
164 | spin_lock_irqsave(&cs->lock, flags); | |
165 | ||
166 | for (channel = 0; channel < cs->channels; ++channel) | |
167 | if (test_timeout(&cs->bcs[channel].at_state)) | |
168 | timeout = 1; | |
169 | ||
170 | if (test_timeout(&cs->at_state)) | |
171 | timeout = 1; | |
172 | ||
173 | list_for_each_entry(at_state, &cs->temp_at_states, list) | |
174 | if (test_timeout(at_state)) | |
175 | timeout = 1; | |
176 | ||
69049cc8 | 177 | if (cs->running) { |
ec81b5e6 | 178 | mod_timer(&cs->timer, jiffies + msecs_to_jiffies(GIG_TICK)); |
6fd5ea63 | 179 | if (timeout) { |
1528b18f | 180 | gig_dbg(DEBUG_EVENT, "scheduling timeout"); |
6fd5ea63 HL |
181 | tasklet_schedule(&cs->event_tasklet); |
182 | } | |
183 | } | |
184 | ||
185 | spin_unlock_irqrestore(&cs->lock, flags); | |
186 | } | |
187 | ||
188 | int gigaset_get_channel(struct bc_state *bcs) | |
189 | { | |
190 | unsigned long flags; | |
191 | ||
192 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
e468c048 | 193 | if (bcs->use_count || !try_module_get(bcs->cs->driver->owner)) { |
1528b18f | 194 | gig_dbg(DEBUG_CHANNEL, "could not allocate channel %d", |
784d5858 | 195 | bcs->channel); |
6fd5ea63 HL |
196 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
197 | return 0; | |
198 | } | |
199 | ++bcs->use_count; | |
200 | bcs->busy = 1; | |
1528b18f | 201 | gig_dbg(DEBUG_CHANNEL, "allocated channel %d", bcs->channel); |
6fd5ea63 HL |
202 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
203 | return 1; | |
204 | } | |
205 | ||
7bb5fdc2 TS |
206 | struct bc_state *gigaset_get_free_channel(struct cardstate *cs) |
207 | { | |
208 | unsigned long flags; | |
209 | int i; | |
210 | ||
211 | spin_lock_irqsave(&cs->lock, flags); | |
212 | if (!try_module_get(cs->driver->owner)) { | |
1528b18f | 213 | gig_dbg(DEBUG_CHANNEL, |
7bb5fdc2 TS |
214 | "could not get module for allocating channel"); |
215 | spin_unlock_irqrestore(&cs->lock, flags); | |
216 | return NULL; | |
217 | } | |
218 | for (i = 0; i < cs->channels; ++i) | |
219 | if (!cs->bcs[i].use_count) { | |
220 | ++cs->bcs[i].use_count; | |
221 | cs->bcs[i].busy = 1; | |
222 | spin_unlock_irqrestore(&cs->lock, flags); | |
1528b18f | 223 | gig_dbg(DEBUG_CHANNEL, "allocated channel %d", i); |
7bb5fdc2 TS |
224 | return cs->bcs + i; |
225 | } | |
226 | module_put(cs->driver->owner); | |
227 | spin_unlock_irqrestore(&cs->lock, flags); | |
1528b18f | 228 | gig_dbg(DEBUG_CHANNEL, "no free channel"); |
7bb5fdc2 TS |
229 | return NULL; |
230 | } | |
231 | ||
6fd5ea63 HL |
232 | void gigaset_free_channel(struct bc_state *bcs) |
233 | { | |
234 | unsigned long flags; | |
235 | ||
236 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
237 | if (!bcs->busy) { | |
1528b18f TS |
238 | gig_dbg(DEBUG_CHANNEL, "could not free channel %d", |
239 | bcs->channel); | |
6fd5ea63 HL |
240 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
241 | return; | |
242 | } | |
243 | --bcs->use_count; | |
244 | bcs->busy = 0; | |
e468c048 | 245 | module_put(bcs->cs->driver->owner); |
1528b18f | 246 | gig_dbg(DEBUG_CHANNEL, "freed channel %d", bcs->channel); |
6fd5ea63 HL |
247 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
248 | } | |
249 | ||
250 | int gigaset_get_channels(struct cardstate *cs) | |
251 | { | |
252 | unsigned long flags; | |
253 | int i; | |
254 | ||
255 | spin_lock_irqsave(&cs->lock, flags); | |
256 | for (i = 0; i < cs->channels; ++i) | |
257 | if (cs->bcs[i].use_count) { | |
258 | spin_unlock_irqrestore(&cs->lock, flags); | |
1528b18f TS |
259 | gig_dbg(DEBUG_CHANNEL, |
260 | "could not allocate all channels"); | |
6fd5ea63 HL |
261 | return 0; |
262 | } | |
263 | for (i = 0; i < cs->channels; ++i) | |
264 | ++cs->bcs[i].use_count; | |
265 | spin_unlock_irqrestore(&cs->lock, flags); | |
266 | ||
1528b18f | 267 | gig_dbg(DEBUG_CHANNEL, "allocated all channels"); |
6fd5ea63 HL |
268 | |
269 | return 1; | |
270 | } | |
271 | ||
272 | void gigaset_free_channels(struct cardstate *cs) | |
273 | { | |
274 | unsigned long flags; | |
275 | int i; | |
276 | ||
1528b18f | 277 | gig_dbg(DEBUG_CHANNEL, "unblocking all channels"); |
6fd5ea63 HL |
278 | spin_lock_irqsave(&cs->lock, flags); |
279 | for (i = 0; i < cs->channels; ++i) | |
280 | --cs->bcs[i].use_count; | |
281 | spin_unlock_irqrestore(&cs->lock, flags); | |
282 | } | |
283 | ||
284 | void gigaset_block_channels(struct cardstate *cs) | |
285 | { | |
286 | unsigned long flags; | |
287 | int i; | |
288 | ||
1528b18f | 289 | gig_dbg(DEBUG_CHANNEL, "blocking all channels"); |
6fd5ea63 HL |
290 | spin_lock_irqsave(&cs->lock, flags); |
291 | for (i = 0; i < cs->channels; ++i) | |
292 | ++cs->bcs[i].use_count; | |
293 | spin_unlock_irqrestore(&cs->lock, flags); | |
294 | } | |
295 | ||
296 | static void clear_events(struct cardstate *cs) | |
297 | { | |
298 | struct event_t *ev; | |
299 | unsigned head, tail; | |
69049cc8 | 300 | unsigned long flags; |
6fd5ea63 | 301 | |
69049cc8 | 302 | spin_lock_irqsave(&cs->ev_lock, flags); |
6fd5ea63 | 303 | |
69049cc8 TS |
304 | head = cs->ev_head; |
305 | tail = cs->ev_tail; | |
6fd5ea63 HL |
306 | |
307 | while (tail != head) { | |
308 | ev = cs->events + head; | |
309 | kfree(ev->ptr); | |
6fd5ea63 HL |
310 | head = (head + 1) % MAX_EVENTS; |
311 | } | |
312 | ||
69049cc8 TS |
313 | cs->ev_head = tail; |
314 | ||
315 | spin_unlock_irqrestore(&cs->ev_lock, flags); | |
6fd5ea63 HL |
316 | } |
317 | ||
1cec9727 TS |
318 | /** |
319 | * gigaset_add_event() - add event to device event queue | |
320 | * @cs: device descriptor structure. | |
321 | * @at_state: connection state structure. | |
322 | * @type: event type. | |
323 | * @ptr: pointer parameter for event. | |
324 | * @parameter: integer parameter for event. | |
325 | * @arg: pointer parameter for event. | |
326 | * | |
327 | * Allocate an event queue entry from the device's event queue, and set it up | |
328 | * with the parameters given. | |
329 | * | |
330 | * Return value: added event | |
331 | */ | |
6fd5ea63 | 332 | struct event_t *gigaset_add_event(struct cardstate *cs, |
784d5858 TS |
333 | struct at_state_t *at_state, int type, |
334 | void *ptr, int parameter, void *arg) | |
6fd5ea63 HL |
335 | { |
336 | unsigned long flags; | |
337 | unsigned next, tail; | |
338 | struct event_t *event = NULL; | |
339 | ||
1528b18f TS |
340 | gig_dbg(DEBUG_EVENT, "queueing event %d", type); |
341 | ||
6fd5ea63 HL |
342 | spin_lock_irqsave(&cs->ev_lock, flags); |
343 | ||
69049cc8 | 344 | tail = cs->ev_tail; |
6fd5ea63 | 345 | next = (tail + 1) % MAX_EVENTS; |
69049cc8 | 346 | if (unlikely(next == cs->ev_head)) |
5002779d | 347 | dev_err(cs->dev, "event queue full\n"); |
6fd5ea63 HL |
348 | else { |
349 | event = cs->events + tail; | |
350 | event->type = type; | |
351 | event->at_state = at_state; | |
352 | event->cid = -1; | |
353 | event->ptr = ptr; | |
354 | event->arg = arg; | |
355 | event->parameter = parameter; | |
69049cc8 | 356 | cs->ev_tail = next; |
6fd5ea63 HL |
357 | } |
358 | ||
359 | spin_unlock_irqrestore(&cs->ev_lock, flags); | |
360 | ||
361 | return event; | |
362 | } | |
363 | EXPORT_SYMBOL_GPL(gigaset_add_event); | |
364 | ||
365 | static void free_strings(struct at_state_t *at_state) | |
366 | { | |
367 | int i; | |
368 | ||
369 | for (i = 0; i < STR_NUM; ++i) { | |
370 | kfree(at_state->str_var[i]); | |
371 | at_state->str_var[i] = NULL; | |
372 | } | |
373 | } | |
374 | ||
375 | static void clear_at_state(struct at_state_t *at_state) | |
376 | { | |
377 | free_strings(at_state); | |
378 | } | |
379 | ||
380 | static void dealloc_at_states(struct cardstate *cs) | |
381 | { | |
382 | struct at_state_t *cur, *next; | |
383 | ||
384 | list_for_each_entry_safe(cur, next, &cs->temp_at_states, list) { | |
385 | list_del(&cur->list); | |
386 | free_strings(cur); | |
387 | kfree(cur); | |
388 | } | |
389 | } | |
390 | ||
391 | static void gigaset_freebcs(struct bc_state *bcs) | |
392 | { | |
393 | int i; | |
394 | ||
784d5858 | 395 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->hw", bcs->channel); |
d9ba9c91 | 396 | if (!bcs->cs->ops->freebcshw(bcs)) |
784d5858 | 397 | gig_dbg(DEBUG_INIT, "failed"); |
6fd5ea63 | 398 | |
784d5858 | 399 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]->at_state", bcs->channel); |
6fd5ea63 | 400 | clear_at_state(&bcs->at_state); |
784d5858 | 401 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->skb", bcs->channel); |
e7752ee2 TS |
402 | dev_kfree_skb(bcs->rx_skb); |
403 | bcs->rx_skb = NULL; | |
6fd5ea63 | 404 | |
6fd5ea63 HL |
405 | for (i = 0; i < AT_NUM; ++i) { |
406 | kfree(bcs->commands[i]); | |
407 | bcs->commands[i] = NULL; | |
408 | } | |
409 | } | |
410 | ||
70440cf2 TS |
411 | static struct cardstate *alloc_cs(struct gigaset_driver *drv) |
412 | { | |
413 | unsigned long flags; | |
414 | unsigned i; | |
e468c048 | 415 | struct cardstate *cs; |
e702ff0b | 416 | struct cardstate *ret = NULL; |
70440cf2 TS |
417 | |
418 | spin_lock_irqsave(&drv->lock, flags); | |
e468c048 TS |
419 | if (drv->blocked) |
420 | goto exit; | |
70440cf2 | 421 | for (i = 0; i < drv->minors; ++i) { |
e468c048 TS |
422 | cs = drv->cs + i; |
423 | if (!(cs->flags & VALID_MINOR)) { | |
424 | cs->flags = VALID_MINOR; | |
425 | ret = cs; | |
70440cf2 | 426 | break; |
e702ff0b | 427 | } |
70440cf2 | 428 | } |
e468c048 | 429 | exit: |
70440cf2 TS |
430 | spin_unlock_irqrestore(&drv->lock, flags); |
431 | return ret; | |
432 | } | |
433 | ||
434 | static void free_cs(struct cardstate *cs) | |
435 | { | |
e468c048 | 436 | cs->flags = 0; |
70440cf2 TS |
437 | } |
438 | ||
439 | static void make_valid(struct cardstate *cs, unsigned mask) | |
440 | { | |
441 | unsigned long flags; | |
442 | struct gigaset_driver *drv = cs->driver; | |
443 | spin_lock_irqsave(&drv->lock, flags); | |
e468c048 | 444 | cs->flags |= mask; |
70440cf2 TS |
445 | spin_unlock_irqrestore(&drv->lock, flags); |
446 | } | |
447 | ||
448 | static void make_invalid(struct cardstate *cs, unsigned mask) | |
449 | { | |
450 | unsigned long flags; | |
451 | struct gigaset_driver *drv = cs->driver; | |
452 | spin_lock_irqsave(&drv->lock, flags); | |
e468c048 | 453 | cs->flags &= ~mask; |
70440cf2 TS |
454 | spin_unlock_irqrestore(&drv->lock, flags); |
455 | } | |
456 | ||
1cec9727 TS |
457 | /** |
458 | * gigaset_freecs() - free all associated ressources of a device | |
459 | * @cs: device descriptor structure. | |
460 | * | |
461 | * Stops all tasklets and timers, unregisters the device from all | |
462 | * subsystems it was registered to, deallocates the device structure | |
463 | * @cs and all structures referenced from it. | |
464 | * Operations on the device should be stopped before calling this. | |
465 | */ | |
6fd5ea63 HL |
466 | void gigaset_freecs(struct cardstate *cs) |
467 | { | |
468 | int i; | |
469 | unsigned long flags; | |
470 | ||
471 | if (!cs) | |
472 | return; | |
473 | ||
abfd1dc7 | 474 | mutex_lock(&cs->mutex); |
6fd5ea63 HL |
475 | |
476 | if (!cs->bcs) | |
477 | goto f_cs; | |
478 | if (!cs->inbuf) | |
479 | goto f_bcs; | |
480 | ||
481 | spin_lock_irqsave(&cs->lock, flags); | |
69049cc8 | 482 | cs->running = 0; |
917f5085 TS |
483 | spin_unlock_irqrestore(&cs->lock, flags); /* event handler and timer are |
484 | not rescheduled below */ | |
6fd5ea63 HL |
485 | |
486 | tasklet_kill(&cs->event_tasklet); | |
487 | del_timer_sync(&cs->timer); | |
488 | ||
489 | switch (cs->cs_init) { | |
490 | default: | |
088ec0cc TS |
491 | /* clear B channel structures */ |
492 | for (i = 0; i < cs->channels; ++i) { | |
493 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i); | |
494 | gigaset_freebcs(cs->bcs + i); | |
495 | } | |
496 | ||
3dda4e37 HL |
497 | /* clear device sysfs */ |
498 | gigaset_free_dev_sysfs(cs); | |
499 | ||
6fd5ea63 HL |
500 | gigaset_if_free(cs); |
501 | ||
784d5858 | 502 | gig_dbg(DEBUG_INIT, "clearing hw"); |
6fd5ea63 HL |
503 | cs->ops->freecshw(cs); |
504 | ||
6fd5ea63 HL |
505 | /* fall through */ |
506 | case 2: /* error in initcshw */ | |
507 | /* Deregister from LL */ | |
508 | make_invalid(cs, VALID_ID); | |
bc35b4e3 | 509 | gigaset_isdn_unregdev(cs); |
6fd5ea63 HL |
510 | |
511 | /* fall through */ | |
088ec0cc | 512 | case 1: /* error when registering to LL */ |
784d5858 | 513 | gig_dbg(DEBUG_INIT, "clearing at_state"); |
6fd5ea63 HL |
514 | clear_at_state(&cs->at_state); |
515 | dealloc_at_states(cs); | |
516 | ||
517 | /* fall through */ | |
088ec0cc | 518 | case 0: /* error in basic setup */ |
6fd5ea63 | 519 | clear_events(cs); |
784d5858 | 520 | gig_dbg(DEBUG_INIT, "freeing inbuf"); |
6fd5ea63 HL |
521 | kfree(cs->inbuf); |
522 | } | |
784d5858 | 523 | f_bcs: gig_dbg(DEBUG_INIT, "freeing bcs[]"); |
6fd5ea63 | 524 | kfree(cs->bcs); |
784d5858 | 525 | f_cs: gig_dbg(DEBUG_INIT, "freeing cs"); |
abfd1dc7 | 526 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
527 | free_cs(cs); |
528 | } | |
529 | EXPORT_SYMBOL_GPL(gigaset_freecs); | |
530 | ||
531 | void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs, | |
784d5858 | 532 | struct cardstate *cs, int cid) |
6fd5ea63 HL |
533 | { |
534 | int i; | |
535 | ||
536 | INIT_LIST_HEAD(&at_state->list); | |
537 | at_state->waiting = 0; | |
538 | at_state->getstring = 0; | |
539 | at_state->pending_commands = 0; | |
540 | at_state->timer_expires = 0; | |
541 | at_state->timer_active = 0; | |
69049cc8 TS |
542 | at_state->timer_index = 0; |
543 | at_state->seq_index = 0; | |
6fd5ea63 HL |
544 | at_state->ConState = 0; |
545 | for (i = 0; i < STR_NUM; ++i) | |
546 | at_state->str_var[i] = NULL; | |
547 | at_state->int_var[VAR_ZDLE] = 0; | |
548 | at_state->int_var[VAR_ZCTP] = -1; | |
549 | at_state->int_var[VAR_ZSAU] = ZSAU_NULL; | |
550 | at_state->cs = cs; | |
551 | at_state->bcs = bcs; | |
552 | at_state->cid = cid; | |
553 | if (!cid) | |
554 | at_state->replystruct = cs->tabnocid; | |
555 | else | |
556 | at_state->replystruct = cs->tabcid; | |
557 | } | |
558 | ||
559 | ||
2032e2c2 | 560 | static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct cardstate *cs) |
6fd5ea63 HL |
561 | /* inbuf->read must be allocated before! */ |
562 | { | |
9d4bee2b TS |
563 | inbuf->head = 0; |
564 | inbuf->tail = 0; | |
6fd5ea63 | 565 | inbuf->cs = cs; |
2032e2c2 | 566 | inbuf->inputstate = INS_command; |
6fd5ea63 HL |
567 | } |
568 | ||
1cec9727 TS |
569 | /** |
570 | * gigaset_fill_inbuf() - append received data to input buffer | |
571 | * @inbuf: buffer structure. | |
572 | * @src: received data. | |
573 | * @numbytes: number of bytes received. | |
574 | */ | |
714e8236 TS |
575 | int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src, |
576 | unsigned numbytes) | |
577 | { | |
578 | unsigned n, head, tail, bytesleft; | |
579 | ||
580 | gig_dbg(DEBUG_INTR, "received %u bytes", numbytes); | |
581 | ||
582 | if (!numbytes) | |
583 | return 0; | |
584 | ||
585 | bytesleft = numbytes; | |
9d4bee2b TS |
586 | tail = inbuf->tail; |
587 | head = inbuf->head; | |
714e8236 TS |
588 | gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail); |
589 | ||
590 | while (bytesleft) { | |
591 | if (head > tail) | |
592 | n = head - 1 - tail; | |
593 | else if (head == 0) | |
475be4d8 | 594 | n = (RBUFSIZE - 1) - tail; |
714e8236 TS |
595 | else |
596 | n = RBUFSIZE - tail; | |
597 | if (!n) { | |
598 | dev_err(inbuf->cs->dev, | |
898eb71c JP |
599 | "buffer overflow (%u bytes lost)\n", |
600 | bytesleft); | |
714e8236 TS |
601 | break; |
602 | } | |
603 | if (n > bytesleft) | |
604 | n = bytesleft; | |
605 | memcpy(inbuf->data + tail, src, n); | |
606 | bytesleft -= n; | |
607 | tail = (tail + n) % RBUFSIZE; | |
608 | src += n; | |
609 | } | |
610 | gig_dbg(DEBUG_INTR, "setting tail to %u", tail); | |
9d4bee2b | 611 | inbuf->tail = tail; |
714e8236 TS |
612 | return numbytes != bytesleft; |
613 | } | |
614 | EXPORT_SYMBOL_GPL(gigaset_fill_inbuf); | |
615 | ||
6fd5ea63 HL |
616 | /* Initialize the b-channel structure */ |
617 | static struct bc_state *gigaset_initbcs(struct bc_state *bcs, | |
784d5858 | 618 | struct cardstate *cs, int channel) |
6fd5ea63 HL |
619 | { |
620 | int i; | |
621 | ||
d9ba9c91 | 622 | bcs->tx_skb = NULL; |
6fd5ea63 HL |
623 | |
624 | skb_queue_head_init(&bcs->squeue); | |
625 | ||
626 | bcs->corrupted = 0; | |
627 | bcs->trans_down = 0; | |
628 | bcs->trans_up = 0; | |
629 | ||
784d5858 | 630 | gig_dbg(DEBUG_INIT, "setting up bcs[%d]->at_state", channel); |
6fd5ea63 HL |
631 | gigaset_at_init(&bcs->at_state, bcs, cs, -1); |
632 | ||
6fd5ea63 HL |
633 | #ifdef CONFIG_GIGASET_DEBUG |
634 | bcs->emptycount = 0; | |
635 | #endif | |
636 | ||
e7752ee2 TS |
637 | bcs->rx_bufsize = 0; |
638 | bcs->rx_skb = NULL; | |
639 | bcs->rx_fcs = PPP_INITFCS; | |
6fd5ea63 | 640 | bcs->inputstate = 0; |
6fd5ea63 HL |
641 | bcs->channel = channel; |
642 | bcs->cs = cs; | |
643 | ||
644 | bcs->chstate = 0; | |
645 | bcs->use_count = 1; | |
646 | bcs->busy = 0; | |
647 | bcs->ignore = cs->ignoreframes; | |
648 | ||
649 | for (i = 0; i < AT_NUM; ++i) | |
650 | bcs->commands[i] = NULL; | |
651 | ||
1b4843c5 TS |
652 | spin_lock_init(&bcs->aplock); |
653 | bcs->ap = NULL; | |
654 | bcs->apconnstate = 0; | |
655 | ||
784d5858 | 656 | gig_dbg(DEBUG_INIT, " setting up bcs[%d]->hw", channel); |
6fd5ea63 HL |
657 | if (cs->ops->initbcshw(bcs)) |
658 | return bcs; | |
659 | ||
784d5858 | 660 | gig_dbg(DEBUG_INIT, " failed"); |
6fd5ea63 HL |
661 | return NULL; |
662 | } | |
663 | ||
1cec9727 TS |
664 | /** |
665 | * gigaset_initcs() - initialize device structure | |
666 | * @drv: hardware driver the device belongs to | |
667 | * @channels: number of B channels supported by device | |
668 | * @onechannel: !=0 if B channel data and AT commands share one | |
669 | * communication channel (M10x), | |
670 | * ==0 if B channels have separate communication channels (base) | |
671 | * @ignoreframes: number of frames to ignore after setting up B channel | |
672 | * @cidmode: !=0: start in CallID mode | |
673 | * @modulename: name of driver module for LL registration | |
674 | * | |
6fd5ea63 HL |
675 | * Allocate and initialize cardstate structure for Gigaset driver |
676 | * Calls hardware dependent gigaset_initcshw() function | |
677 | * Calls B channel initialization function gigaset_initbcs() for each B channel | |
1cec9727 TS |
678 | * |
679 | * Return value: | |
6fd5ea63 HL |
680 | * pointer to cardstate structure |
681 | */ | |
682 | struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels, | |
683 | int onechannel, int ignoreframes, | |
684 | int cidmode, const char *modulename) | |
685 | { | |
d9ba9c91 | 686 | struct cardstate *cs; |
69049cc8 | 687 | unsigned long flags; |
6fd5ea63 HL |
688 | int i; |
689 | ||
784d5858 | 690 | gig_dbg(DEBUG_INIT, "allocating cs"); |
d9ba9c91 TS |
691 | cs = alloc_cs(drv); |
692 | if (!cs) { | |
c8770dca | 693 | pr_err("maximum number of devices exceeded\n"); |
e702ff0b TS |
694 | return NULL; |
695 | } | |
e702ff0b | 696 | |
784d5858 | 697 | gig_dbg(DEBUG_INIT, "allocating bcs[0..%d]", channels - 1); |
6fd5ea63 | 698 | cs->bcs = kmalloc(channels * sizeof(struct bc_state), GFP_KERNEL); |
e702ff0b | 699 | if (!cs->bcs) { |
c8770dca | 700 | pr_err("out of memory\n"); |
6fd5ea63 | 701 | goto error; |
e702ff0b | 702 | } |
784d5858 | 703 | gig_dbg(DEBUG_INIT, "allocating inbuf"); |
6fd5ea63 | 704 | cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL); |
e702ff0b | 705 | if (!cs->inbuf) { |
c8770dca | 706 | pr_err("out of memory\n"); |
6fd5ea63 | 707 | goto error; |
e702ff0b | 708 | } |
6fd5ea63 HL |
709 | |
710 | cs->cs_init = 0; | |
711 | cs->channels = channels; | |
712 | cs->onechannel = onechannel; | |
713 | cs->ignoreframes = ignoreframes; | |
714 | INIT_LIST_HEAD(&cs->temp_at_states); | |
69049cc8 | 715 | cs->running = 0; |
6fd5ea63 HL |
716 | init_timer(&cs->timer); /* clear next & prev */ |
717 | spin_lock_init(&cs->ev_lock); | |
69049cc8 TS |
718 | cs->ev_tail = 0; |
719 | cs->ev_head = 0; | |
abfd1dc7 | 720 | |
5452fee2 | 721 | tasklet_init(&cs->event_tasklet, gigaset_handle_event, |
917f5085 | 722 | (unsigned long) cs); |
9d4bee2b | 723 | cs->commands_pending = 0; |
6fd5ea63 HL |
724 | cs->cur_at_seq = 0; |
725 | cs->gotfwver = -1; | |
726 | cs->open_count = 0; | |
784d5858 | 727 | cs->dev = NULL; |
6fd5ea63 | 728 | cs->tty = NULL; |
01107d34 | 729 | cs->tty_dev = NULL; |
69049cc8 | 730 | cs->cidmode = cidmode != 0; |
528efc6a TS |
731 | cs->tabnocid = gigaset_tab_nocid; |
732 | cs->tabcid = gigaset_tab_cid; | |
6fd5ea63 HL |
733 | |
734 | init_waitqueue_head(&cs->waitqueue); | |
735 | cs->waiting = 0; | |
736 | ||
9d4bee2b TS |
737 | cs->mode = M_UNKNOWN; |
738 | cs->mstate = MS_UNINITIALIZED; | |
6fd5ea63 | 739 | |
6fd5ea63 HL |
740 | ++cs->cs_init; |
741 | ||
784d5858 | 742 | gig_dbg(DEBUG_INIT, "setting up at_state"); |
6fd5ea63 HL |
743 | spin_lock_init(&cs->lock); |
744 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
745 | cs->dle = 0; | |
746 | cs->cbytes = 0; | |
747 | ||
784d5858 | 748 | gig_dbg(DEBUG_INIT, "setting up inbuf"); |
2032e2c2 | 749 | gigaset_inbuf_init(cs->inbuf, cs); |
6fd5ea63 | 750 | |
69049cc8 TS |
751 | cs->connected = 0; |
752 | cs->isdn_up = 0; | |
6fd5ea63 | 753 | |
784d5858 | 754 | gig_dbg(DEBUG_INIT, "setting up cmdbuf"); |
6fd5ea63 HL |
755 | cs->cmdbuf = cs->lastcmdbuf = NULL; |
756 | spin_lock_init(&cs->cmdlock); | |
757 | cs->curlen = 0; | |
758 | cs->cmdbytes = 0; | |
759 | ||
784d5858 | 760 | gig_dbg(DEBUG_INIT, "setting up iif"); |
bc35b4e3 | 761 | if (!gigaset_isdn_regdev(cs, modulename)) { |
c8770dca | 762 | pr_err("error registering ISDN device\n"); |
6fd5ea63 HL |
763 | goto error; |
764 | } | |
765 | ||
766 | make_valid(cs, VALID_ID); | |
767 | ++cs->cs_init; | |
784d5858 | 768 | gig_dbg(DEBUG_INIT, "setting up hw"); |
c8770dca | 769 | if (!cs->ops->initcshw(cs)) |
6fd5ea63 HL |
770 | goto error; |
771 | ||
772 | ++cs->cs_init; | |
773 | ||
7435f50e | 774 | /* set up character device */ |
6fd5ea63 HL |
775 | gigaset_if_init(cs); |
776 | ||
3dda4e37 HL |
777 | /* set up device sysfs */ |
778 | gigaset_init_dev_sysfs(cs); | |
779 | ||
088ec0cc TS |
780 | /* set up channel data structures */ |
781 | for (i = 0; i < channels; ++i) { | |
782 | gig_dbg(DEBUG_INIT, "setting up bcs[%d]", i); | |
783 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) { | |
784 | pr_err("could not allocate channel %d data\n", i); | |
785 | goto error; | |
786 | } | |
787 | } | |
788 | ||
69049cc8 TS |
789 | spin_lock_irqsave(&cs->lock, flags); |
790 | cs->running = 1; | |
791 | spin_unlock_irqrestore(&cs->lock, flags); | |
ec81b5e6 TS |
792 | setup_timer(&cs->timer, timer_tick, (unsigned long) cs); |
793 | cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK); | |
6fd5ea63 HL |
794 | add_timer(&cs->timer); |
795 | ||
784d5858 | 796 | gig_dbg(DEBUG_INIT, "cs initialized"); |
6fd5ea63 HL |
797 | return cs; |
798 | ||
e702ff0b | 799 | error: |
784d5858 | 800 | gig_dbg(DEBUG_INIT, "failed"); |
6fd5ea63 HL |
801 | gigaset_freecs(cs); |
802 | return NULL; | |
803 | } | |
804 | EXPORT_SYMBOL_GPL(gigaset_initcs); | |
805 | ||
73a88814 | 806 | /* ReInitialize the b-channel structure on hangup */ |
6fd5ea63 HL |
807 | void gigaset_bcs_reinit(struct bc_state *bcs) |
808 | { | |
809 | struct sk_buff *skb; | |
810 | struct cardstate *cs = bcs->cs; | |
811 | unsigned long flags; | |
812 | ||
813 | while ((skb = skb_dequeue(&bcs->squeue)) != NULL) | |
814 | dev_kfree_skb(skb); | |
815 | ||
917f5085 | 816 | spin_lock_irqsave(&cs->lock, flags); |
6fd5ea63 HL |
817 | clear_at_state(&bcs->at_state); |
818 | bcs->at_state.ConState = 0; | |
819 | bcs->at_state.timer_active = 0; | |
820 | bcs->at_state.timer_expires = 0; | |
784d5858 | 821 | bcs->at_state.cid = -1; /* No CID defined */ |
6fd5ea63 HL |
822 | spin_unlock_irqrestore(&cs->lock, flags); |
823 | ||
824 | bcs->inputstate = 0; | |
825 | ||
826 | #ifdef CONFIG_GIGASET_DEBUG | |
827 | bcs->emptycount = 0; | |
828 | #endif | |
829 | ||
e7752ee2 | 830 | bcs->rx_fcs = PPP_INITFCS; |
6fd5ea63 HL |
831 | bcs->chstate = 0; |
832 | ||
833 | bcs->ignore = cs->ignoreframes; | |
e7752ee2 TS |
834 | dev_kfree_skb(bcs->rx_skb); |
835 | bcs->rx_skb = NULL; | |
6fd5ea63 HL |
836 | |
837 | cs->ops->reinitbcshw(bcs); | |
838 | } | |
839 | ||
840 | static void cleanup_cs(struct cardstate *cs) | |
841 | { | |
842 | struct cmdbuf_t *cb, *tcb; | |
843 | int i; | |
844 | unsigned long flags; | |
845 | ||
846 | spin_lock_irqsave(&cs->lock, flags); | |
847 | ||
9d4bee2b TS |
848 | cs->mode = M_UNKNOWN; |
849 | cs->mstate = MS_UNINITIALIZED; | |
6fd5ea63 HL |
850 | |
851 | clear_at_state(&cs->at_state); | |
852 | dealloc_at_states(cs); | |
853 | free_strings(&cs->at_state); | |
854 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
855 | ||
6fd5ea63 | 856 | cs->inbuf->inputstate = INS_command; |
9d4bee2b TS |
857 | cs->inbuf->head = 0; |
858 | cs->inbuf->tail = 0; | |
6fd5ea63 HL |
859 | |
860 | cb = cs->cmdbuf; | |
861 | while (cb) { | |
862 | tcb = cb; | |
863 | cb = cb->next; | |
864 | kfree(tcb); | |
865 | } | |
866 | cs->cmdbuf = cs->lastcmdbuf = NULL; | |
867 | cs->curlen = 0; | |
868 | cs->cmdbytes = 0; | |
869 | cs->gotfwver = -1; | |
870 | cs->dle = 0; | |
871 | cs->cur_at_seq = 0; | |
9d4bee2b | 872 | cs->commands_pending = 0; |
6fd5ea63 HL |
873 | cs->cbytes = 0; |
874 | ||
875 | spin_unlock_irqrestore(&cs->lock, flags); | |
876 | ||
877 | for (i = 0; i < cs->channels; ++i) { | |
878 | gigaset_freebcs(cs->bcs + i); | |
879 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) | |
c8770dca | 880 | pr_err("could not allocate channel %d data\n", i); |
6fd5ea63 HL |
881 | } |
882 | ||
883 | if (cs->waiting) { | |
884 | cs->cmd_result = -ENODEV; | |
885 | cs->waiting = 0; | |
886 | wake_up_interruptible(&cs->waitqueue); | |
887 | } | |
888 | } | |
889 | ||
890 | ||
1cec9727 TS |
891 | /** |
892 | * gigaset_start() - start device operations | |
893 | * @cs: device descriptor structure. | |
894 | * | |
895 | * Prepares the device for use by setting up communication parameters, | |
896 | * scheduling an EV_START event to initiate device initialization, and | |
897 | * waiting for completion of the initialization. | |
898 | * | |
899 | * Return value: | |
900 | * 1 - success, 0 - error | |
901 | */ | |
6fd5ea63 HL |
902 | int gigaset_start(struct cardstate *cs) |
903 | { | |
69049cc8 TS |
904 | unsigned long flags; |
905 | ||
abfd1dc7 | 906 | if (mutex_lock_interruptible(&cs->mutex)) |
6fd5ea63 | 907 | return 0; |
6fd5ea63 | 908 | |
69049cc8 TS |
909 | spin_lock_irqsave(&cs->lock, flags); |
910 | cs->connected = 1; | |
911 | spin_unlock_irqrestore(&cs->lock, flags); | |
6fd5ea63 | 912 | |
9d4bee2b | 913 | if (cs->mstate != MS_LOCKED) { |
475be4d8 | 914 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR | TIOCM_RTS); |
6fd5ea63 HL |
915 | cs->ops->baud_rate(cs, B115200); |
916 | cs->ops->set_line_ctrl(cs, CS8); | |
475be4d8 | 917 | cs->control_state = TIOCM_DTR | TIOCM_RTS; |
6fd5ea63 HL |
918 | } |
919 | ||
920 | cs->waiting = 1; | |
921 | ||
922 | if (!gigaset_add_event(cs, &cs->at_state, EV_START, NULL, 0, NULL)) { | |
923 | cs->waiting = 0; | |
6fd5ea63 HL |
924 | goto error; |
925 | } | |
6fd5ea63 HL |
926 | gigaset_schedule_event(cs); |
927 | ||
928 | wait_event(cs->waitqueue, !cs->waiting); | |
929 | ||
abfd1dc7 | 930 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
931 | return 1; |
932 | ||
933 | error: | |
abfd1dc7 | 934 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
935 | return 0; |
936 | } | |
937 | EXPORT_SYMBOL_GPL(gigaset_start); | |
938 | ||
1cec9727 TS |
939 | /** |
940 | * gigaset_shutdown() - shut down device operations | |
941 | * @cs: device descriptor structure. | |
942 | * | |
943 | * Deactivates the device by scheduling an EV_SHUTDOWN event and | |
944 | * waiting for completion of the shutdown. | |
945 | * | |
946 | * Return value: | |
947 | * 0 - success, -1 - error (no device associated) | |
e468c048 TS |
948 | */ |
949 | int gigaset_shutdown(struct cardstate *cs) | |
6fd5ea63 | 950 | { |
abfd1dc7 | 951 | mutex_lock(&cs->mutex); |
6fd5ea63 | 952 | |
5d49c101 TS |
953 | if (!(cs->flags & VALID_MINOR)) { |
954 | mutex_unlock(&cs->mutex); | |
e468c048 | 955 | return -1; |
5d49c101 | 956 | } |
e468c048 | 957 | |
6fd5ea63 HL |
958 | cs->waiting = 1; |
959 | ||
1528b18f | 960 | if (!gigaset_add_event(cs, &cs->at_state, EV_SHUTDOWN, NULL, 0, NULL)) |
6fd5ea63 | 961 | goto exit; |
6fd5ea63 HL |
962 | gigaset_schedule_event(cs); |
963 | ||
2869b23e | 964 | wait_event(cs->waitqueue, !cs->waiting); |
6fd5ea63 HL |
965 | |
966 | cleanup_cs(cs); | |
967 | ||
968 | exit: | |
abfd1dc7 | 969 | mutex_unlock(&cs->mutex); |
e468c048 | 970 | return 0; |
6fd5ea63 HL |
971 | } |
972 | EXPORT_SYMBOL_GPL(gigaset_shutdown); | |
973 | ||
1cec9727 TS |
974 | /** |
975 | * gigaset_stop() - stop device operations | |
976 | * @cs: device descriptor structure. | |
977 | * | |
978 | * Stops operations on the device by scheduling an EV_STOP event and | |
979 | * waiting for completion of the shutdown. | |
980 | */ | |
6fd5ea63 HL |
981 | void gigaset_stop(struct cardstate *cs) |
982 | { | |
abfd1dc7 | 983 | mutex_lock(&cs->mutex); |
6fd5ea63 | 984 | |
6fd5ea63 HL |
985 | cs->waiting = 1; |
986 | ||
1528b18f | 987 | if (!gigaset_add_event(cs, &cs->at_state, EV_STOP, NULL, 0, NULL)) |
6fd5ea63 | 988 | goto exit; |
6fd5ea63 HL |
989 | gigaset_schedule_event(cs); |
990 | ||
2869b23e | 991 | wait_event(cs->waitqueue, !cs->waiting); |
6fd5ea63 | 992 | |
6fd5ea63 HL |
993 | cleanup_cs(cs); |
994 | ||
995 | exit: | |
abfd1dc7 | 996 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
997 | } |
998 | EXPORT_SYMBOL_GPL(gigaset_stop); | |
999 | ||
1000 | static LIST_HEAD(drivers); | |
34af946a | 1001 | static DEFINE_SPINLOCK(driver_lock); |
6fd5ea63 HL |
1002 | |
1003 | struct cardstate *gigaset_get_cs_by_id(int id) | |
1004 | { | |
1005 | unsigned long flags; | |
35dc8457 TS |
1006 | struct cardstate *ret = NULL; |
1007 | struct cardstate *cs; | |
6fd5ea63 HL |
1008 | struct gigaset_driver *drv; |
1009 | unsigned i; | |
1010 | ||
1011 | spin_lock_irqsave(&driver_lock, flags); | |
1012 | list_for_each_entry(drv, &drivers, list) { | |
1013 | spin_lock(&drv->lock); | |
1014 | for (i = 0; i < drv->minors; ++i) { | |
e468c048 TS |
1015 | cs = drv->cs + i; |
1016 | if ((cs->flags & VALID_ID) && cs->myid == id) { | |
1017 | ret = cs; | |
6fd5ea63 | 1018 | break; |
e468c048 | 1019 | } |
6fd5ea63 HL |
1020 | } |
1021 | spin_unlock(&drv->lock); | |
1022 | if (ret) | |
1023 | break; | |
1024 | } | |
1025 | spin_unlock_irqrestore(&driver_lock, flags); | |
1026 | return ret; | |
1027 | } | |
1028 | ||
8ca445df | 1029 | static struct cardstate *gigaset_get_cs_by_minor(unsigned minor) |
6fd5ea63 HL |
1030 | { |
1031 | unsigned long flags; | |
35dc8457 | 1032 | struct cardstate *ret = NULL; |
6fd5ea63 HL |
1033 | struct gigaset_driver *drv; |
1034 | unsigned index; | |
1035 | ||
1036 | spin_lock_irqsave(&driver_lock, flags); | |
1037 | list_for_each_entry(drv, &drivers, list) { | |
1038 | if (minor < drv->minor || minor >= drv->minor + drv->minors) | |
1039 | continue; | |
1040 | index = minor - drv->minor; | |
1041 | spin_lock(&drv->lock); | |
e468c048 | 1042 | if (drv->cs[index].flags & VALID_MINOR) |
6fd5ea63 HL |
1043 | ret = drv->cs + index; |
1044 | spin_unlock(&drv->lock); | |
1045 | if (ret) | |
1046 | break; | |
1047 | } | |
1048 | spin_unlock_irqrestore(&driver_lock, flags); | |
1049 | return ret; | |
1050 | } | |
1051 | ||
8ca445df AB |
1052 | struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty) |
1053 | { | |
1054 | if (tty->index < 0 || tty->index >= tty->driver->num) | |
1055 | return NULL; | |
1056 | return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start); | |
1057 | } | |
1058 | ||
1cec9727 TS |
1059 | /** |
1060 | * gigaset_freedriver() - free all associated ressources of a driver | |
1061 | * @drv: driver descriptor structure. | |
1062 | * | |
1063 | * Unregisters the driver from the system and deallocates the driver | |
1064 | * structure @drv and all structures referenced from it. | |
1065 | * All devices should be shut down before calling this. | |
1066 | */ | |
6fd5ea63 HL |
1067 | void gigaset_freedriver(struct gigaset_driver *drv) |
1068 | { | |
1069 | unsigned long flags; | |
1070 | ||
1071 | spin_lock_irqsave(&driver_lock, flags); | |
1072 | list_del(&drv->list); | |
1073 | spin_unlock_irqrestore(&driver_lock, flags); | |
1074 | ||
1075 | gigaset_if_freedriver(drv); | |
6fd5ea63 HL |
1076 | |
1077 | kfree(drv->cs); | |
6fd5ea63 HL |
1078 | kfree(drv); |
1079 | } | |
1080 | EXPORT_SYMBOL_GPL(gigaset_freedriver); | |
1081 | ||
1cec9727 TS |
1082 | /** |
1083 | * gigaset_initdriver() - initialize driver structure | |
1084 | * @minor: First minor number | |
1085 | * @minors: Number of minors this driver can handle | |
1086 | * @procname: Name of the driver | |
1087 | * @devname: Name of the device files (prefix without minor number) | |
1088 | * | |
6fd5ea63 | 1089 | * Allocate and initialize gigaset_driver structure. Initialize interface. |
1cec9727 TS |
1090 | * |
1091 | * Return value: | |
784d5858 | 1092 | * Pointer to the gigaset_driver structure on success, NULL on failure. |
6fd5ea63 HL |
1093 | */ |
1094 | struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors, | |
784d5858 TS |
1095 | const char *procname, |
1096 | const char *devname, | |
784d5858 TS |
1097 | const struct gigaset_ops *ops, |
1098 | struct module *owner) | |
6fd5ea63 HL |
1099 | { |
1100 | struct gigaset_driver *drv; | |
1101 | unsigned long flags; | |
1102 | unsigned i; | |
1103 | ||
1104 | drv = kmalloc(sizeof *drv, GFP_KERNEL); | |
1105 | if (!drv) | |
1106 | return NULL; | |
f4675c70 | 1107 | |
6fd5ea63 HL |
1108 | drv->have_tty = 0; |
1109 | drv->minor = minor; | |
1110 | drv->minors = minors; | |
1111 | spin_lock_init(&drv->lock); | |
1112 | drv->blocked = 0; | |
1113 | drv->ops = ops; | |
1114 | drv->owner = owner; | |
1115 | INIT_LIST_HEAD(&drv->list); | |
1116 | ||
1117 | drv->cs = kmalloc(minors * sizeof *drv->cs, GFP_KERNEL); | |
1118 | if (!drv->cs) | |
e702ff0b | 1119 | goto error; |
f4675c70 | 1120 | |
6fd5ea63 | 1121 | for (i = 0; i < minors; ++i) { |
e468c048 | 1122 | drv->cs[i].flags = 0; |
6fd5ea63 HL |
1123 | drv->cs[i].driver = drv; |
1124 | drv->cs[i].ops = drv->ops; | |
1125 | drv->cs[i].minor_index = i; | |
5d49c101 | 1126 | mutex_init(&drv->cs[i].mutex); |
6fd5ea63 HL |
1127 | } |
1128 | ||
f4eaa370 | 1129 | gigaset_if_initdriver(drv, procname, devname); |
6fd5ea63 HL |
1130 | |
1131 | spin_lock_irqsave(&driver_lock, flags); | |
1132 | list_add(&drv->list, &drivers); | |
1133 | spin_unlock_irqrestore(&driver_lock, flags); | |
1134 | ||
1135 | return drv; | |
1136 | ||
e702ff0b | 1137 | error: |
6fd5ea63 | 1138 | kfree(drv->cs); |
6fd5ea63 | 1139 | kfree(drv); |
6fd5ea63 HL |
1140 | return NULL; |
1141 | } | |
1142 | EXPORT_SYMBOL_GPL(gigaset_initdriver); | |
1143 | ||
1cec9727 TS |
1144 | /** |
1145 | * gigaset_blockdriver() - block driver | |
1146 | * @drv: driver descriptor structure. | |
1147 | * | |
1148 | * Prevents the driver from attaching new devices, in preparation for | |
1149 | * deregistration. | |
1150 | */ | |
6fd5ea63 HL |
1151 | void gigaset_blockdriver(struct gigaset_driver *drv) |
1152 | { | |
6fd5ea63 | 1153 | drv->blocked = 1; |
6fd5ea63 HL |
1154 | } |
1155 | EXPORT_SYMBOL_GPL(gigaset_blockdriver); | |
1156 | ||
1157 | static int __init gigaset_init_module(void) | |
1158 | { | |
1159 | /* in accordance with the principle of least astonishment, | |
1160 | * setting the 'debug' parameter to 1 activates a sensible | |
1161 | * set of default debug levels | |
1162 | */ | |
1163 | if (gigaset_debuglevel == 1) | |
1164 | gigaset_debuglevel = DEBUG_DEFAULT; | |
1165 | ||
2038724c | 1166 | pr_info(DRIVER_DESC DRIVER_DESC_DEBUG "\n"); |
bc35b4e3 | 1167 | gigaset_isdn_regdrv(); |
6fd5ea63 HL |
1168 | return 0; |
1169 | } | |
1170 | ||
1171 | static void __exit gigaset_exit_module(void) | |
1172 | { | |
bc35b4e3 | 1173 | gigaset_isdn_unregdrv(); |
6fd5ea63 HL |
1174 | } |
1175 | ||
1176 | module_init(gigaset_init_module); | |
1177 | module_exit(gigaset_exit_module); | |
1178 | ||
1179 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1180 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1181 | ||
1182 | MODULE_LICENSE("GPL"); |