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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 | ||
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 | |
34 | #define ASSIGNED 0x04 | |
6fd5ea63 | 35 | |
6fd5ea63 | 36 | void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg, |
01371500 | 37 | size_t len, const unsigned char *buf) |
6fd5ea63 HL |
38 | { |
39 | unsigned char outbuf[80]; | |
784d5858 | 40 | unsigned char c; |
6fd5ea63 HL |
41 | size_t space = sizeof outbuf - 1; |
42 | unsigned char *out = outbuf; | |
01371500 | 43 | size_t numin = len; |
6fd5ea63 | 44 | |
01371500 | 45 | while (numin--) { |
784d5858 TS |
46 | c = *buf++; |
47 | if (c == '~' || c == '^' || c == '\\') { | |
01371500 | 48 | if (!space--) |
784d5858 TS |
49 | break; |
50 | *out++ = '\\'; | |
51 | } | |
52 | if (c & 0x80) { | |
01371500 | 53 | if (!space--) |
784d5858 TS |
54 | break; |
55 | *out++ = '~'; | |
56 | c ^= 0x80; | |
57 | } | |
58 | if (c < 0x20 || c == 0x7f) { | |
01371500 | 59 | if (!space--) |
784d5858 | 60 | break; |
6fd5ea63 | 61 | *out++ = '^'; |
784d5858 | 62 | c ^= 0x40; |
6fd5ea63 | 63 | } |
01371500 | 64 | if (!space--) |
784d5858 TS |
65 | break; |
66 | *out++ = c; | |
6fd5ea63 HL |
67 | } |
68 | *out = 0; | |
69 | ||
784d5858 | 70 | gig_dbg(level, "%s (%u bytes): %s", msg, (unsigned) len, outbuf); |
6fd5ea63 HL |
71 | } |
72 | EXPORT_SYMBOL_GPL(gigaset_dbg_buffer); | |
73 | ||
74 | static int setflags(struct cardstate *cs, unsigned flags, unsigned delay) | |
75 | { | |
76 | int r; | |
77 | ||
78 | r = cs->ops->set_modem_ctrl(cs, cs->control_state, flags); | |
79 | cs->control_state = flags; | |
80 | if (r < 0) | |
81 | return r; | |
82 | ||
83 | if (delay) { | |
84 | set_current_state(TASK_INTERRUPTIBLE); | |
85 | schedule_timeout(delay * HZ / 1000); | |
86 | } | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | int gigaset_enterconfigmode(struct cardstate *cs) | |
92 | { | |
93 | int i, r; | |
94 | ||
6fd5ea63 HL |
95 | cs->control_state = TIOCM_RTS; //FIXME |
96 | ||
97 | r = setflags(cs, TIOCM_DTR, 200); | |
98 | if (r < 0) | |
99 | goto error; | |
100 | r = setflags(cs, 0, 200); | |
101 | if (r < 0) | |
102 | goto error; | |
103 | for (i = 0; i < 5; ++i) { | |
104 | r = setflags(cs, TIOCM_RTS, 100); | |
105 | if (r < 0) | |
106 | goto error; | |
107 | r = setflags(cs, 0, 100); | |
108 | if (r < 0) | |
109 | goto error; | |
110 | } | |
111 | r = setflags(cs, TIOCM_RTS|TIOCM_DTR, 800); | |
112 | if (r < 0) | |
113 | goto error; | |
114 | ||
115 | return 0; | |
116 | ||
117 | error: | |
784d5858 | 118 | dev_err(cs->dev, "error %d on setuartbits\n", -r); |
6fd5ea63 HL |
119 | cs->control_state = TIOCM_RTS|TIOCM_DTR; // FIXME is this a good value? |
120 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_RTS|TIOCM_DTR); | |
121 | ||
122 | return -1; //r | |
123 | } | |
124 | ||
125 | static int test_timeout(struct at_state_t *at_state) | |
126 | { | |
127 | if (!at_state->timer_expires) | |
128 | return 0; | |
129 | ||
130 | if (--at_state->timer_expires) { | |
784d5858 TS |
131 | gig_dbg(DEBUG_MCMD, "decreased timer of %p to %lu", |
132 | at_state, at_state->timer_expires); | |
6fd5ea63 HL |
133 | return 0; |
134 | } | |
135 | ||
136 | if (!gigaset_add_event(at_state->cs, at_state, EV_TIMEOUT, NULL, | |
69049cc8 | 137 | at_state->timer_index, NULL)) { |
6fd5ea63 HL |
138 | //FIXME what should we do? |
139 | } | |
140 | ||
141 | return 1; | |
142 | } | |
143 | ||
144 | static void timer_tick(unsigned long data) | |
145 | { | |
146 | struct cardstate *cs = (struct cardstate *) data; | |
147 | unsigned long flags; | |
148 | unsigned channel; | |
149 | struct at_state_t *at_state; | |
150 | int timeout = 0; | |
151 | ||
152 | spin_lock_irqsave(&cs->lock, flags); | |
153 | ||
154 | for (channel = 0; channel < cs->channels; ++channel) | |
155 | if (test_timeout(&cs->bcs[channel].at_state)) | |
156 | timeout = 1; | |
157 | ||
158 | if (test_timeout(&cs->at_state)) | |
159 | timeout = 1; | |
160 | ||
161 | list_for_each_entry(at_state, &cs->temp_at_states, list) | |
162 | if (test_timeout(at_state)) | |
163 | timeout = 1; | |
164 | ||
69049cc8 | 165 | if (cs->running) { |
ec81b5e6 | 166 | mod_timer(&cs->timer, jiffies + msecs_to_jiffies(GIG_TICK)); |
6fd5ea63 | 167 | if (timeout) { |
784d5858 | 168 | gig_dbg(DEBUG_CMD, "scheduling timeout"); |
6fd5ea63 HL |
169 | tasklet_schedule(&cs->event_tasklet); |
170 | } | |
171 | } | |
172 | ||
173 | spin_unlock_irqrestore(&cs->lock, flags); | |
174 | } | |
175 | ||
176 | int gigaset_get_channel(struct bc_state *bcs) | |
177 | { | |
178 | unsigned long flags; | |
179 | ||
180 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
181 | if (bcs->use_count) { | |
784d5858 TS |
182 | gig_dbg(DEBUG_ANY, "could not allocate channel %d", |
183 | bcs->channel); | |
6fd5ea63 HL |
184 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
185 | return 0; | |
186 | } | |
187 | ++bcs->use_count; | |
188 | bcs->busy = 1; | |
784d5858 | 189 | gig_dbg(DEBUG_ANY, "allocated channel %d", bcs->channel); |
6fd5ea63 HL |
190 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
191 | return 1; | |
192 | } | |
193 | ||
194 | void gigaset_free_channel(struct bc_state *bcs) | |
195 | { | |
196 | unsigned long flags; | |
197 | ||
198 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
199 | if (!bcs->busy) { | |
784d5858 | 200 | gig_dbg(DEBUG_ANY, "could not free channel %d", bcs->channel); |
6fd5ea63 HL |
201 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
202 | return; | |
203 | } | |
204 | --bcs->use_count; | |
205 | bcs->busy = 0; | |
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)) |
6fd5ea63 HL |
290 | err("event queue full"); |
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; | |
e702ff0b | 359 | struct cardstate *ret = NULL; |
70440cf2 TS |
360 | |
361 | spin_lock_irqsave(&drv->lock, flags); | |
362 | for (i = 0; i < drv->minors; ++i) { | |
363 | if (!(drv->flags[i] & VALID_MINOR)) { | |
e702ff0b TS |
364 | if (try_module_get(drv->owner)) { |
365 | drv->flags[i] = VALID_MINOR; | |
366 | ret = drv->cs + i; | |
367 | } | |
70440cf2 | 368 | break; |
e702ff0b | 369 | } |
70440cf2 TS |
370 | } |
371 | spin_unlock_irqrestore(&drv->lock, flags); | |
372 | return ret; | |
373 | } | |
374 | ||
375 | static void free_cs(struct cardstate *cs) | |
376 | { | |
377 | unsigned long flags; | |
378 | struct gigaset_driver *drv = cs->driver; | |
379 | spin_lock_irqsave(&drv->lock, flags); | |
e702ff0b TS |
380 | if (drv->flags[cs->minor_index] & VALID_MINOR) |
381 | module_put(drv->owner); | |
70440cf2 TS |
382 | drv->flags[cs->minor_index] = 0; |
383 | spin_unlock_irqrestore(&drv->lock, flags); | |
384 | } | |
385 | ||
386 | static void make_valid(struct cardstate *cs, unsigned mask) | |
387 | { | |
388 | unsigned long flags; | |
389 | struct gigaset_driver *drv = cs->driver; | |
390 | spin_lock_irqsave(&drv->lock, flags); | |
391 | drv->flags[cs->minor_index] |= mask; | |
392 | spin_unlock_irqrestore(&drv->lock, flags); | |
393 | } | |
394 | ||
395 | static void make_invalid(struct cardstate *cs, unsigned mask) | |
396 | { | |
397 | unsigned long flags; | |
398 | struct gigaset_driver *drv = cs->driver; | |
399 | spin_lock_irqsave(&drv->lock, flags); | |
400 | drv->flags[cs->minor_index] &= ~mask; | |
401 | spin_unlock_irqrestore(&drv->lock, flags); | |
402 | } | |
403 | ||
6fd5ea63 HL |
404 | void gigaset_freecs(struct cardstate *cs) |
405 | { | |
406 | int i; | |
407 | unsigned long flags; | |
408 | ||
409 | if (!cs) | |
410 | return; | |
411 | ||
abfd1dc7 | 412 | mutex_lock(&cs->mutex); |
6fd5ea63 HL |
413 | |
414 | if (!cs->bcs) | |
415 | goto f_cs; | |
416 | if (!cs->inbuf) | |
417 | goto f_bcs; | |
418 | ||
419 | spin_lock_irqsave(&cs->lock, flags); | |
69049cc8 | 420 | cs->running = 0; |
917f5085 TS |
421 | spin_unlock_irqrestore(&cs->lock, flags); /* event handler and timer are |
422 | not rescheduled below */ | |
6fd5ea63 HL |
423 | |
424 | tasklet_kill(&cs->event_tasklet); | |
425 | del_timer_sync(&cs->timer); | |
426 | ||
427 | switch (cs->cs_init) { | |
428 | default: | |
3dda4e37 HL |
429 | /* clear device sysfs */ |
430 | gigaset_free_dev_sysfs(cs); | |
431 | ||
6fd5ea63 HL |
432 | gigaset_if_free(cs); |
433 | ||
784d5858 | 434 | gig_dbg(DEBUG_INIT, "clearing hw"); |
6fd5ea63 HL |
435 | cs->ops->freecshw(cs); |
436 | ||
437 | //FIXME cmdbuf | |
438 | ||
439 | /* fall through */ | |
440 | case 2: /* error in initcshw */ | |
441 | /* Deregister from LL */ | |
442 | make_invalid(cs, VALID_ID); | |
784d5858 | 443 | gig_dbg(DEBUG_INIT, "clearing iif"); |
6fd5ea63 HL |
444 | gigaset_i4l_cmd(cs, ISDN_STAT_UNLOAD); |
445 | ||
446 | /* fall through */ | |
447 | case 1: /* error when regestering to LL */ | |
784d5858 | 448 | gig_dbg(DEBUG_INIT, "clearing at_state"); |
6fd5ea63 HL |
449 | clear_at_state(&cs->at_state); |
450 | dealloc_at_states(cs); | |
451 | ||
452 | /* fall through */ | |
453 | case 0: /* error in one call to initbcs */ | |
454 | for (i = 0; i < cs->channels; ++i) { | |
784d5858 | 455 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i); |
6fd5ea63 HL |
456 | gigaset_freebcs(cs->bcs + i); |
457 | } | |
458 | ||
459 | clear_events(cs); | |
784d5858 | 460 | gig_dbg(DEBUG_INIT, "freeing inbuf"); |
6fd5ea63 HL |
461 | kfree(cs->inbuf); |
462 | } | |
784d5858 | 463 | f_bcs: gig_dbg(DEBUG_INIT, "freeing bcs[]"); |
6fd5ea63 | 464 | kfree(cs->bcs); |
784d5858 | 465 | f_cs: gig_dbg(DEBUG_INIT, "freeing cs"); |
abfd1dc7 | 466 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
467 | free_cs(cs); |
468 | } | |
469 | EXPORT_SYMBOL_GPL(gigaset_freecs); | |
470 | ||
471 | void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs, | |
784d5858 | 472 | struct cardstate *cs, int cid) |
6fd5ea63 HL |
473 | { |
474 | int i; | |
475 | ||
476 | INIT_LIST_HEAD(&at_state->list); | |
477 | at_state->waiting = 0; | |
478 | at_state->getstring = 0; | |
479 | at_state->pending_commands = 0; | |
480 | at_state->timer_expires = 0; | |
481 | at_state->timer_active = 0; | |
69049cc8 TS |
482 | at_state->timer_index = 0; |
483 | at_state->seq_index = 0; | |
6fd5ea63 HL |
484 | at_state->ConState = 0; |
485 | for (i = 0; i < STR_NUM; ++i) | |
486 | at_state->str_var[i] = NULL; | |
487 | at_state->int_var[VAR_ZDLE] = 0; | |
488 | at_state->int_var[VAR_ZCTP] = -1; | |
489 | at_state->int_var[VAR_ZSAU] = ZSAU_NULL; | |
490 | at_state->cs = cs; | |
491 | at_state->bcs = bcs; | |
492 | at_state->cid = cid; | |
493 | if (!cid) | |
494 | at_state->replystruct = cs->tabnocid; | |
495 | else | |
496 | at_state->replystruct = cs->tabcid; | |
497 | } | |
498 | ||
499 | ||
500 | static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct bc_state *bcs, | |
784d5858 | 501 | struct cardstate *cs, int inputstate) |
6fd5ea63 HL |
502 | /* inbuf->read must be allocated before! */ |
503 | { | |
504 | atomic_set(&inbuf->head, 0); | |
505 | atomic_set(&inbuf->tail, 0); | |
506 | inbuf->cs = cs; | |
507 | inbuf->bcs = bcs; /*base driver: NULL*/ | |
508 | inbuf->rcvbuf = NULL; //FIXME | |
509 | inbuf->inputstate = inputstate; | |
510 | } | |
511 | ||
714e8236 TS |
512 | /* append received bytes to inbuf */ |
513 | int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src, | |
514 | unsigned numbytes) | |
515 | { | |
516 | unsigned n, head, tail, bytesleft; | |
517 | ||
518 | gig_dbg(DEBUG_INTR, "received %u bytes", numbytes); | |
519 | ||
520 | if (!numbytes) | |
521 | return 0; | |
522 | ||
523 | bytesleft = numbytes; | |
524 | tail = atomic_read(&inbuf->tail); | |
525 | head = atomic_read(&inbuf->head); | |
526 | gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail); | |
527 | ||
528 | while (bytesleft) { | |
529 | if (head > tail) | |
530 | n = head - 1 - tail; | |
531 | else if (head == 0) | |
532 | n = (RBUFSIZE-1) - tail; | |
533 | else | |
534 | n = RBUFSIZE - tail; | |
535 | if (!n) { | |
536 | dev_err(inbuf->cs->dev, | |
537 | "buffer overflow (%u bytes lost)", bytesleft); | |
538 | break; | |
539 | } | |
540 | if (n > bytesleft) | |
541 | n = bytesleft; | |
542 | memcpy(inbuf->data + tail, src, n); | |
543 | bytesleft -= n; | |
544 | tail = (tail + n) % RBUFSIZE; | |
545 | src += n; | |
546 | } | |
547 | gig_dbg(DEBUG_INTR, "setting tail to %u", tail); | |
548 | atomic_set(&inbuf->tail, tail); | |
549 | return numbytes != bytesleft; | |
550 | } | |
551 | EXPORT_SYMBOL_GPL(gigaset_fill_inbuf); | |
552 | ||
6fd5ea63 HL |
553 | /* Initialize the b-channel structure */ |
554 | static struct bc_state *gigaset_initbcs(struct bc_state *bcs, | |
784d5858 | 555 | struct cardstate *cs, int channel) |
6fd5ea63 HL |
556 | { |
557 | int i; | |
558 | ||
559 | bcs->tx_skb = NULL; //FIXME -> hw part | |
560 | ||
561 | skb_queue_head_init(&bcs->squeue); | |
562 | ||
563 | bcs->corrupted = 0; | |
564 | bcs->trans_down = 0; | |
565 | bcs->trans_up = 0; | |
566 | ||
784d5858 | 567 | gig_dbg(DEBUG_INIT, "setting up bcs[%d]->at_state", channel); |
6fd5ea63 HL |
568 | gigaset_at_init(&bcs->at_state, bcs, cs, -1); |
569 | ||
570 | bcs->rcvbytes = 0; | |
571 | ||
572 | #ifdef CONFIG_GIGASET_DEBUG | |
573 | bcs->emptycount = 0; | |
574 | #endif | |
575 | ||
784d5858 | 576 | gig_dbg(DEBUG_INIT, "allocating bcs[%d]->skb", channel); |
6fd5ea63 HL |
577 | bcs->fcs = PPP_INITFCS; |
578 | bcs->inputstate = 0; | |
579 | if (cs->ignoreframes) { | |
580 | bcs->inputstate |= INS_skip_frame; | |
581 | bcs->skb = NULL; | |
582 | } else if ((bcs->skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN)) != NULL) | |
583 | skb_reserve(bcs->skb, HW_HDR_LEN); | |
584 | else { | |
e702ff0b | 585 | warn("could not allocate skb"); |
6fd5ea63 HL |
586 | bcs->inputstate |= INS_skip_frame; |
587 | } | |
588 | ||
589 | bcs->channel = channel; | |
590 | bcs->cs = cs; | |
591 | ||
592 | bcs->chstate = 0; | |
593 | bcs->use_count = 1; | |
594 | bcs->busy = 0; | |
595 | bcs->ignore = cs->ignoreframes; | |
596 | ||
597 | for (i = 0; i < AT_NUM; ++i) | |
598 | bcs->commands[i] = NULL; | |
599 | ||
784d5858 | 600 | gig_dbg(DEBUG_INIT, " setting up bcs[%d]->hw", channel); |
6fd5ea63 HL |
601 | if (cs->ops->initbcshw(bcs)) |
602 | return bcs; | |
603 | ||
784d5858 | 604 | gig_dbg(DEBUG_INIT, " failed"); |
6fd5ea63 | 605 | |
784d5858 | 606 | gig_dbg(DEBUG_INIT, " freeing bcs[%d]->skb", channel); |
6fd5ea63 HL |
607 | if (bcs->skb) |
608 | dev_kfree_skb(bcs->skb); | |
609 | ||
610 | return NULL; | |
611 | } | |
612 | ||
613 | /* gigaset_initcs | |
614 | * Allocate and initialize cardstate structure for Gigaset driver | |
615 | * Calls hardware dependent gigaset_initcshw() function | |
616 | * Calls B channel initialization function gigaset_initbcs() for each B channel | |
617 | * parameters: | |
784d5858 | 618 | * drv hardware driver the device belongs to |
6fd5ea63 | 619 | * channels number of B channels supported by device |
917f5085 TS |
620 | * onechannel !=0: B channel data and AT commands share one |
621 | * communication channel | |
6fd5ea63 HL |
622 | * ==0: B channels have separate communication channels |
623 | * ignoreframes number of frames to ignore after setting up B channel | |
624 | * cidmode !=0: start in CallID mode | |
625 | * modulename name of driver module (used for I4L registration) | |
626 | * return value: | |
627 | * pointer to cardstate structure | |
628 | */ | |
629 | struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels, | |
630 | int onechannel, int ignoreframes, | |
631 | int cidmode, const char *modulename) | |
632 | { | |
633 | struct cardstate *cs = NULL; | |
69049cc8 | 634 | unsigned long flags; |
6fd5ea63 HL |
635 | int i; |
636 | ||
784d5858 | 637 | gig_dbg(DEBUG_INIT, "allocating cs"); |
e702ff0b TS |
638 | if (!(cs = alloc_cs(drv))) { |
639 | err("maximum number of devices exceeded"); | |
640 | return NULL; | |
641 | } | |
642 | mutex_init(&cs->mutex); | |
e702ff0b | 643 | |
784d5858 | 644 | gig_dbg(DEBUG_INIT, "allocating bcs[0..%d]", channels - 1); |
6fd5ea63 | 645 | cs->bcs = kmalloc(channels * sizeof(struct bc_state), GFP_KERNEL); |
e702ff0b TS |
646 | if (!cs->bcs) { |
647 | err("out of memory"); | |
6fd5ea63 | 648 | goto error; |
e702ff0b | 649 | } |
784d5858 | 650 | gig_dbg(DEBUG_INIT, "allocating inbuf"); |
6fd5ea63 | 651 | cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL); |
e702ff0b TS |
652 | if (!cs->inbuf) { |
653 | err("out of memory"); | |
6fd5ea63 | 654 | goto error; |
e702ff0b | 655 | } |
6fd5ea63 HL |
656 | |
657 | cs->cs_init = 0; | |
658 | cs->channels = channels; | |
659 | cs->onechannel = onechannel; | |
660 | cs->ignoreframes = ignoreframes; | |
661 | INIT_LIST_HEAD(&cs->temp_at_states); | |
69049cc8 | 662 | cs->running = 0; |
6fd5ea63 HL |
663 | init_timer(&cs->timer); /* clear next & prev */ |
664 | spin_lock_init(&cs->ev_lock); | |
69049cc8 TS |
665 | cs->ev_tail = 0; |
666 | cs->ev_head = 0; | |
abfd1dc7 | 667 | |
917f5085 TS |
668 | tasklet_init(&cs->event_tasklet, &gigaset_handle_event, |
669 | (unsigned long) cs); | |
6fd5ea63 HL |
670 | atomic_set(&cs->commands_pending, 0); |
671 | cs->cur_at_seq = 0; | |
672 | cs->gotfwver = -1; | |
673 | cs->open_count = 0; | |
784d5858 | 674 | cs->dev = NULL; |
6fd5ea63 | 675 | cs->tty = NULL; |
01107d34 | 676 | cs->tty_dev = NULL; |
69049cc8 | 677 | cs->cidmode = cidmode != 0; |
6fd5ea63 HL |
678 | |
679 | //if(onechannel) { //FIXME | |
680 | cs->tabnocid = gigaset_tab_nocid_m10x; | |
681 | cs->tabcid = gigaset_tab_cid_m10x; | |
682 | //} else { | |
683 | // cs->tabnocid = gigaset_tab_nocid; | |
684 | // cs->tabcid = gigaset_tab_cid; | |
685 | //} | |
686 | ||
687 | init_waitqueue_head(&cs->waitqueue); | |
688 | cs->waiting = 0; | |
689 | ||
690 | atomic_set(&cs->mode, M_UNKNOWN); | |
691 | atomic_set(&cs->mstate, MS_UNINITIALIZED); | |
692 | ||
693 | for (i = 0; i < channels; ++i) { | |
784d5858 | 694 | gig_dbg(DEBUG_INIT, "setting up bcs[%d].read", i); |
e702ff0b TS |
695 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) { |
696 | err("could not allocate channel %d data", i); | |
6fd5ea63 | 697 | goto error; |
e702ff0b | 698 | } |
6fd5ea63 HL |
699 | } |
700 | ||
701 | ++cs->cs_init; | |
702 | ||
784d5858 | 703 | gig_dbg(DEBUG_INIT, "setting up at_state"); |
6fd5ea63 HL |
704 | spin_lock_init(&cs->lock); |
705 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
706 | cs->dle = 0; | |
707 | cs->cbytes = 0; | |
708 | ||
784d5858 | 709 | gig_dbg(DEBUG_INIT, "setting up inbuf"); |
6fd5ea63 HL |
710 | if (onechannel) { //FIXME distinction necessary? |
711 | gigaset_inbuf_init(cs->inbuf, cs->bcs, cs, INS_command); | |
712 | } else | |
713 | gigaset_inbuf_init(cs->inbuf, NULL, cs, INS_command); | |
714 | ||
69049cc8 TS |
715 | cs->connected = 0; |
716 | cs->isdn_up = 0; | |
6fd5ea63 | 717 | |
784d5858 | 718 | gig_dbg(DEBUG_INIT, "setting up cmdbuf"); |
6fd5ea63 HL |
719 | cs->cmdbuf = cs->lastcmdbuf = NULL; |
720 | spin_lock_init(&cs->cmdlock); | |
721 | cs->curlen = 0; | |
722 | cs->cmdbytes = 0; | |
723 | ||
784d5858 | 724 | gig_dbg(DEBUG_INIT, "setting up iif"); |
6fd5ea63 | 725 | if (!gigaset_register_to_LL(cs, modulename)) { |
784d5858 | 726 | err("register_isdn failed"); |
6fd5ea63 HL |
727 | goto error; |
728 | } | |
729 | ||
730 | make_valid(cs, VALID_ID); | |
731 | ++cs->cs_init; | |
784d5858 | 732 | gig_dbg(DEBUG_INIT, "setting up hw"); |
e702ff0b TS |
733 | if (!cs->ops->initcshw(cs)) { |
734 | err("could not allocate device specific data"); | |
6fd5ea63 | 735 | goto error; |
e702ff0b | 736 | } |
6fd5ea63 HL |
737 | |
738 | ++cs->cs_init; | |
739 | ||
7435f50e | 740 | /* set up character device */ |
6fd5ea63 HL |
741 | gigaset_if_init(cs); |
742 | ||
3dda4e37 HL |
743 | /* set up device sysfs */ |
744 | gigaset_init_dev_sysfs(cs); | |
745 | ||
69049cc8 TS |
746 | spin_lock_irqsave(&cs->lock, flags); |
747 | cs->running = 1; | |
748 | spin_unlock_irqrestore(&cs->lock, flags); | |
ec81b5e6 TS |
749 | setup_timer(&cs->timer, timer_tick, (unsigned long) cs); |
750 | cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK); | |
6fd5ea63 HL |
751 | /* FIXME: can jiffies increase too much until the timer is added? |
752 | * Same problem(?) with mod_timer() in timer_tick(). */ | |
753 | add_timer(&cs->timer); | |
754 | ||
784d5858 | 755 | gig_dbg(DEBUG_INIT, "cs initialized"); |
6fd5ea63 HL |
756 | return cs; |
757 | ||
e702ff0b | 758 | error: |
784d5858 | 759 | gig_dbg(DEBUG_INIT, "failed"); |
6fd5ea63 HL |
760 | gigaset_freecs(cs); |
761 | return NULL; | |
762 | } | |
763 | EXPORT_SYMBOL_GPL(gigaset_initcs); | |
764 | ||
73a88814 | 765 | /* ReInitialize the b-channel structure on hangup */ |
6fd5ea63 HL |
766 | void gigaset_bcs_reinit(struct bc_state *bcs) |
767 | { | |
768 | struct sk_buff *skb; | |
769 | struct cardstate *cs = bcs->cs; | |
770 | unsigned long flags; | |
771 | ||
772 | while ((skb = skb_dequeue(&bcs->squeue)) != NULL) | |
773 | dev_kfree_skb(skb); | |
774 | ||
917f5085 | 775 | spin_lock_irqsave(&cs->lock, flags); |
6fd5ea63 HL |
776 | clear_at_state(&bcs->at_state); |
777 | bcs->at_state.ConState = 0; | |
778 | bcs->at_state.timer_active = 0; | |
779 | bcs->at_state.timer_expires = 0; | |
784d5858 | 780 | bcs->at_state.cid = -1; /* No CID defined */ |
6fd5ea63 HL |
781 | spin_unlock_irqrestore(&cs->lock, flags); |
782 | ||
783 | bcs->inputstate = 0; | |
784 | ||
785 | #ifdef CONFIG_GIGASET_DEBUG | |
786 | bcs->emptycount = 0; | |
787 | #endif | |
788 | ||
789 | bcs->fcs = PPP_INITFCS; | |
790 | bcs->chstate = 0; | |
791 | ||
792 | bcs->ignore = cs->ignoreframes; | |
793 | if (bcs->ignore) | |
794 | bcs->inputstate |= INS_skip_frame; | |
795 | ||
796 | ||
797 | cs->ops->reinitbcshw(bcs); | |
798 | } | |
799 | ||
800 | static void cleanup_cs(struct cardstate *cs) | |
801 | { | |
802 | struct cmdbuf_t *cb, *tcb; | |
803 | int i; | |
804 | unsigned long flags; | |
805 | ||
806 | spin_lock_irqsave(&cs->lock, flags); | |
807 | ||
808 | atomic_set(&cs->mode, M_UNKNOWN); | |
809 | atomic_set(&cs->mstate, MS_UNINITIALIZED); | |
810 | ||
811 | clear_at_state(&cs->at_state); | |
812 | dealloc_at_states(cs); | |
813 | free_strings(&cs->at_state); | |
814 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
815 | ||
816 | kfree(cs->inbuf->rcvbuf); | |
817 | cs->inbuf->rcvbuf = NULL; | |
818 | cs->inbuf->inputstate = INS_command; | |
819 | atomic_set(&cs->inbuf->head, 0); | |
820 | atomic_set(&cs->inbuf->tail, 0); | |
821 | ||
822 | cb = cs->cmdbuf; | |
823 | while (cb) { | |
824 | tcb = cb; | |
825 | cb = cb->next; | |
826 | kfree(tcb); | |
827 | } | |
828 | cs->cmdbuf = cs->lastcmdbuf = NULL; | |
829 | cs->curlen = 0; | |
830 | cs->cmdbytes = 0; | |
831 | cs->gotfwver = -1; | |
832 | cs->dle = 0; | |
833 | cs->cur_at_seq = 0; | |
834 | atomic_set(&cs->commands_pending, 0); | |
835 | cs->cbytes = 0; | |
836 | ||
837 | spin_unlock_irqrestore(&cs->lock, flags); | |
838 | ||
839 | for (i = 0; i < cs->channels; ++i) { | |
840 | gigaset_freebcs(cs->bcs + i); | |
841 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) | |
842 | break; //FIXME error handling | |
843 | } | |
844 | ||
845 | if (cs->waiting) { | |
846 | cs->cmd_result = -ENODEV; | |
847 | cs->waiting = 0; | |
848 | wake_up_interruptible(&cs->waitqueue); | |
849 | } | |
850 | } | |
851 | ||
852 | ||
853 | int gigaset_start(struct cardstate *cs) | |
854 | { | |
69049cc8 TS |
855 | unsigned long flags; |
856 | ||
abfd1dc7 | 857 | if (mutex_lock_interruptible(&cs->mutex)) |
6fd5ea63 | 858 | return 0; |
6fd5ea63 | 859 | |
69049cc8 TS |
860 | spin_lock_irqsave(&cs->lock, flags); |
861 | cs->connected = 1; | |
862 | spin_unlock_irqrestore(&cs->lock, flags); | |
6fd5ea63 HL |
863 | |
864 | if (atomic_read(&cs->mstate) != MS_LOCKED) { | |
865 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR|TIOCM_RTS); | |
866 | cs->ops->baud_rate(cs, B115200); | |
867 | cs->ops->set_line_ctrl(cs, CS8); | |
868 | cs->control_state = TIOCM_DTR|TIOCM_RTS; | |
869 | } else { | |
870 | //FIXME use some saved values? | |
871 | } | |
872 | ||
873 | cs->waiting = 1; | |
874 | ||
875 | if (!gigaset_add_event(cs, &cs->at_state, EV_START, NULL, 0, NULL)) { | |
876 | cs->waiting = 0; | |
877 | //FIXME what should we do? | |
878 | goto error; | |
879 | } | |
880 | ||
784d5858 | 881 | gig_dbg(DEBUG_CMD, "scheduling START"); |
6fd5ea63 HL |
882 | gigaset_schedule_event(cs); |
883 | ||
884 | wait_event(cs->waitqueue, !cs->waiting); | |
885 | ||
abfd1dc7 | 886 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
887 | return 1; |
888 | ||
889 | error: | |
abfd1dc7 | 890 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
891 | return 0; |
892 | } | |
893 | EXPORT_SYMBOL_GPL(gigaset_start); | |
894 | ||
895 | void gigaset_shutdown(struct cardstate *cs) | |
896 | { | |
abfd1dc7 | 897 | mutex_lock(&cs->mutex); |
6fd5ea63 HL |
898 | |
899 | cs->waiting = 1; | |
900 | ||
901 | if (!gigaset_add_event(cs, &cs->at_state, EV_SHUTDOWN, NULL, 0, NULL)) { | |
902 | //FIXME what should we do? | |
903 | goto exit; | |
904 | } | |
905 | ||
784d5858 | 906 | gig_dbg(DEBUG_CMD, "scheduling SHUTDOWN"); |
6fd5ea63 HL |
907 | gigaset_schedule_event(cs); |
908 | ||
2869b23e | 909 | wait_event(cs->waitqueue, !cs->waiting); |
6fd5ea63 HL |
910 | |
911 | cleanup_cs(cs); | |
912 | ||
913 | exit: | |
abfd1dc7 | 914 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
915 | } |
916 | EXPORT_SYMBOL_GPL(gigaset_shutdown); | |
917 | ||
918 | void gigaset_stop(struct cardstate *cs) | |
919 | { | |
abfd1dc7 | 920 | mutex_lock(&cs->mutex); |
6fd5ea63 | 921 | |
6fd5ea63 HL |
922 | cs->waiting = 1; |
923 | ||
924 | if (!gigaset_add_event(cs, &cs->at_state, EV_STOP, NULL, 0, NULL)) { | |
925 | //FIXME what should we do? | |
926 | goto exit; | |
927 | } | |
928 | ||
784d5858 | 929 | gig_dbg(DEBUG_CMD, "scheduling STOP"); |
6fd5ea63 HL |
930 | gigaset_schedule_event(cs); |
931 | ||
2869b23e | 932 | wait_event(cs->waitqueue, !cs->waiting); |
6fd5ea63 | 933 | |
6fd5ea63 HL |
934 | cleanup_cs(cs); |
935 | ||
936 | exit: | |
abfd1dc7 | 937 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
938 | } |
939 | EXPORT_SYMBOL_GPL(gigaset_stop); | |
940 | ||
941 | static LIST_HEAD(drivers); | |
34af946a | 942 | static DEFINE_SPINLOCK(driver_lock); |
6fd5ea63 HL |
943 | |
944 | struct cardstate *gigaset_get_cs_by_id(int id) | |
945 | { | |
946 | unsigned long flags; | |
35dc8457 TS |
947 | struct cardstate *ret = NULL; |
948 | struct cardstate *cs; | |
6fd5ea63 HL |
949 | struct gigaset_driver *drv; |
950 | unsigned i; | |
951 | ||
952 | spin_lock_irqsave(&driver_lock, flags); | |
953 | list_for_each_entry(drv, &drivers, list) { | |
954 | spin_lock(&drv->lock); | |
955 | for (i = 0; i < drv->minors; ++i) { | |
956 | if (drv->flags[i] & VALID_ID) { | |
957 | cs = drv->cs + i; | |
958 | if (cs->myid == id) | |
959 | ret = cs; | |
960 | } | |
961 | if (ret) | |
962 | break; | |
963 | } | |
964 | spin_unlock(&drv->lock); | |
965 | if (ret) | |
966 | break; | |
967 | } | |
968 | spin_unlock_irqrestore(&driver_lock, flags); | |
969 | return ret; | |
970 | } | |
971 | ||
972 | void gigaset_debugdrivers(void) | |
973 | { | |
974 | unsigned long flags; | |
975 | static struct cardstate *cs; | |
976 | struct gigaset_driver *drv; | |
977 | unsigned i; | |
978 | ||
979 | spin_lock_irqsave(&driver_lock, flags); | |
980 | list_for_each_entry(drv, &drivers, list) { | |
784d5858 | 981 | gig_dbg(DEBUG_DRIVER, "driver %p", drv); |
6fd5ea63 HL |
982 | spin_lock(&drv->lock); |
983 | for (i = 0; i < drv->minors; ++i) { | |
784d5858 TS |
984 | gig_dbg(DEBUG_DRIVER, " index %u", i); |
985 | gig_dbg(DEBUG_DRIVER, " flags 0x%02x", | |
986 | drv->flags[i]); | |
6fd5ea63 | 987 | cs = drv->cs + i; |
784d5858 TS |
988 | gig_dbg(DEBUG_DRIVER, " cardstate %p", cs); |
989 | gig_dbg(DEBUG_DRIVER, " minor_index %u", | |
990 | cs->minor_index); | |
991 | gig_dbg(DEBUG_DRIVER, " driver %p", cs->driver); | |
992 | gig_dbg(DEBUG_DRIVER, " i4l id %d", cs->myid); | |
6fd5ea63 HL |
993 | } |
994 | spin_unlock(&drv->lock); | |
995 | } | |
996 | spin_unlock_irqrestore(&driver_lock, flags); | |
997 | } | |
6fd5ea63 | 998 | |
8ca445df | 999 | static struct cardstate *gigaset_get_cs_by_minor(unsigned minor) |
6fd5ea63 HL |
1000 | { |
1001 | unsigned long flags; | |
35dc8457 | 1002 | struct cardstate *ret = NULL; |
6fd5ea63 HL |
1003 | struct gigaset_driver *drv; |
1004 | unsigned index; | |
1005 | ||
1006 | spin_lock_irqsave(&driver_lock, flags); | |
1007 | list_for_each_entry(drv, &drivers, list) { | |
1008 | if (minor < drv->minor || minor >= drv->minor + drv->minors) | |
1009 | continue; | |
1010 | index = minor - drv->minor; | |
1011 | spin_lock(&drv->lock); | |
1012 | if (drv->flags[index] & VALID_MINOR) | |
1013 | ret = drv->cs + index; | |
1014 | spin_unlock(&drv->lock); | |
1015 | if (ret) | |
1016 | break; | |
1017 | } | |
1018 | spin_unlock_irqrestore(&driver_lock, flags); | |
1019 | return ret; | |
1020 | } | |
1021 | ||
8ca445df AB |
1022 | struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty) |
1023 | { | |
1024 | if (tty->index < 0 || tty->index >= tty->driver->num) | |
1025 | return NULL; | |
1026 | return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start); | |
1027 | } | |
1028 | ||
6fd5ea63 HL |
1029 | void gigaset_freedriver(struct gigaset_driver *drv) |
1030 | { | |
1031 | unsigned long flags; | |
1032 | ||
1033 | spin_lock_irqsave(&driver_lock, flags); | |
1034 | list_del(&drv->list); | |
1035 | spin_unlock_irqrestore(&driver_lock, flags); | |
1036 | ||
1037 | gigaset_if_freedriver(drv); | |
6fd5ea63 HL |
1038 | |
1039 | kfree(drv->cs); | |
1040 | kfree(drv->flags); | |
1041 | kfree(drv); | |
1042 | } | |
1043 | EXPORT_SYMBOL_GPL(gigaset_freedriver); | |
1044 | ||
1045 | /* gigaset_initdriver | |
1046 | * Allocate and initialize gigaset_driver structure. Initialize interface. | |
1047 | * parameters: | |
784d5858 TS |
1048 | * minor First minor number |
1049 | * minors Number of minors this driver can handle | |
1050 | * procname Name of the driver | |
1051 | * devname Name of the device files (prefix without minor number) | |
6fd5ea63 | 1052 | * return value: |
784d5858 | 1053 | * Pointer to the gigaset_driver structure on success, NULL on failure. |
6fd5ea63 HL |
1054 | */ |
1055 | struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors, | |
784d5858 TS |
1056 | const char *procname, |
1057 | const char *devname, | |
784d5858 TS |
1058 | const struct gigaset_ops *ops, |
1059 | struct module *owner) | |
6fd5ea63 HL |
1060 | { |
1061 | struct gigaset_driver *drv; | |
1062 | unsigned long flags; | |
1063 | unsigned i; | |
1064 | ||
1065 | drv = kmalloc(sizeof *drv, GFP_KERNEL); | |
1066 | if (!drv) | |
1067 | return NULL; | |
f4675c70 | 1068 | |
6fd5ea63 HL |
1069 | drv->have_tty = 0; |
1070 | drv->minor = minor; | |
1071 | drv->minors = minors; | |
1072 | spin_lock_init(&drv->lock); | |
1073 | drv->blocked = 0; | |
1074 | drv->ops = ops; | |
1075 | drv->owner = owner; | |
1076 | INIT_LIST_HEAD(&drv->list); | |
1077 | ||
1078 | drv->cs = kmalloc(minors * sizeof *drv->cs, GFP_KERNEL); | |
1079 | if (!drv->cs) | |
e702ff0b | 1080 | goto error; |
f4675c70 | 1081 | |
6fd5ea63 HL |
1082 | drv->flags = kmalloc(minors * sizeof *drv->flags, GFP_KERNEL); |
1083 | if (!drv->flags) | |
e702ff0b | 1084 | goto error; |
6fd5ea63 HL |
1085 | |
1086 | for (i = 0; i < minors; ++i) { | |
1087 | drv->flags[i] = 0; | |
1088 | drv->cs[i].driver = drv; | |
1089 | drv->cs[i].ops = drv->ops; | |
1090 | drv->cs[i].minor_index = i; | |
1091 | } | |
1092 | ||
f4eaa370 | 1093 | gigaset_if_initdriver(drv, procname, devname); |
6fd5ea63 HL |
1094 | |
1095 | spin_lock_irqsave(&driver_lock, flags); | |
1096 | list_add(&drv->list, &drivers); | |
1097 | spin_unlock_irqrestore(&driver_lock, flags); | |
1098 | ||
1099 | return drv; | |
1100 | ||
e702ff0b | 1101 | error: |
6fd5ea63 | 1102 | kfree(drv->cs); |
6fd5ea63 | 1103 | kfree(drv); |
6fd5ea63 HL |
1104 | return NULL; |
1105 | } | |
1106 | EXPORT_SYMBOL_GPL(gigaset_initdriver); | |
1107 | ||
6fd5ea63 HL |
1108 | /* For drivers without fixed assignment device<->cardstate (usb) */ |
1109 | struct cardstate *gigaset_getunassignedcs(struct gigaset_driver *drv) | |
1110 | { | |
1111 | unsigned long flags; | |
1112 | struct cardstate *cs = NULL; | |
1113 | unsigned i; | |
1114 | ||
1115 | spin_lock_irqsave(&drv->lock, flags); | |
1116 | if (drv->blocked) | |
1117 | goto exit; | |
1118 | for (i = 0; i < drv->minors; ++i) { | |
1119 | if ((drv->flags[i] & VALID_MINOR) && | |
1120 | !(drv->flags[i] & ASSIGNED)) { | |
1121 | drv->flags[i] |= ASSIGNED; | |
1122 | cs = drv->cs + i; | |
1123 | break; | |
1124 | } | |
1125 | } | |
1126 | exit: | |
1127 | spin_unlock_irqrestore(&drv->lock, flags); | |
1128 | return cs; | |
1129 | } | |
1130 | EXPORT_SYMBOL_GPL(gigaset_getunassignedcs); | |
1131 | ||
1132 | void gigaset_unassign(struct cardstate *cs) | |
1133 | { | |
1134 | unsigned long flags; | |
1135 | unsigned *minor_flags; | |
1136 | struct gigaset_driver *drv; | |
1137 | ||
1138 | if (!cs) | |
1139 | return; | |
1140 | drv = cs->driver; | |
1141 | spin_lock_irqsave(&drv->lock, flags); | |
1142 | minor_flags = drv->flags + cs->minor_index; | |
1143 | if (*minor_flags & VALID_MINOR) | |
1144 | *minor_flags &= ~ASSIGNED; | |
1145 | spin_unlock_irqrestore(&drv->lock, flags); | |
1146 | } | |
1147 | EXPORT_SYMBOL_GPL(gigaset_unassign); | |
1148 | ||
1149 | void gigaset_blockdriver(struct gigaset_driver *drv) | |
1150 | { | |
1151 | unsigned long flags; | |
1152 | spin_lock_irqsave(&drv->lock, flags); | |
1153 | drv->blocked = 1; | |
1154 | spin_unlock_irqrestore(&drv->lock, flags); | |
1155 | } | |
1156 | EXPORT_SYMBOL_GPL(gigaset_blockdriver); | |
1157 | ||
1158 | static int __init gigaset_init_module(void) | |
1159 | { | |
1160 | /* in accordance with the principle of least astonishment, | |
1161 | * setting the 'debug' parameter to 1 activates a sensible | |
1162 | * set of default debug levels | |
1163 | */ | |
1164 | if (gigaset_debuglevel == 1) | |
1165 | gigaset_debuglevel = DEBUG_DEFAULT; | |
1166 | ||
1167 | info(DRIVER_AUTHOR); | |
1168 | info(DRIVER_DESC); | |
1169 | return 0; | |
1170 | } | |
1171 | ||
1172 | static void __exit gigaset_exit_module(void) | |
1173 | { | |
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"); |