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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" | |
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 | 196 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
81fa7b82 | 197 | return -EBUSY; |
6fd5ea63 HL |
198 | } |
199 | ++bcs->use_count; | |
200 | bcs->busy = 1; | |
1528b18f | 201 | gig_dbg(DEBUG_CHANNEL, "allocated channel %d", bcs->channel); |
6fd5ea63 | 202 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
81fa7b82 | 203 | return 0; |
6fd5ea63 HL |
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"); | |
81fa7b82 | 261 | return -EBUSY; |
6fd5ea63 HL |
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 | 268 | |
81fa7b82 | 269 | return 0; |
6fd5ea63 HL |
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 | ||
7643ffbd | 365 | static void clear_at_state(struct at_state_t *at_state) |
6fd5ea63 HL |
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 | ||
7643ffbd | 375 | static void dealloc_temp_at_states(struct cardstate *cs) |
6fd5ea63 HL |
376 | { |
377 | struct at_state_t *cur, *next; | |
378 | ||
379 | list_for_each_entry_safe(cur, next, &cs->temp_at_states, list) { | |
380 | list_del(&cur->list); | |
7643ffbd | 381 | clear_at_state(cur); |
6fd5ea63 HL |
382 | kfree(cur); |
383 | } | |
384 | } | |
385 | ||
386 | static void gigaset_freebcs(struct bc_state *bcs) | |
387 | { | |
388 | int i; | |
389 | ||
784d5858 | 390 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->hw", bcs->channel); |
81fa7b82 | 391 | bcs->cs->ops->freebcshw(bcs); |
6fd5ea63 | 392 | |
784d5858 | 393 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]->at_state", bcs->channel); |
6fd5ea63 | 394 | clear_at_state(&bcs->at_state); |
784d5858 | 395 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->skb", bcs->channel); |
e7752ee2 TS |
396 | dev_kfree_skb(bcs->rx_skb); |
397 | bcs->rx_skb = NULL; | |
6fd5ea63 | 398 | |
6fd5ea63 HL |
399 | for (i = 0; i < AT_NUM; ++i) { |
400 | kfree(bcs->commands[i]); | |
401 | bcs->commands[i] = NULL; | |
402 | } | |
403 | } | |
404 | ||
70440cf2 TS |
405 | static struct cardstate *alloc_cs(struct gigaset_driver *drv) |
406 | { | |
407 | unsigned long flags; | |
408 | unsigned i; | |
e468c048 | 409 | struct cardstate *cs; |
e702ff0b | 410 | struct cardstate *ret = NULL; |
70440cf2 TS |
411 | |
412 | spin_lock_irqsave(&drv->lock, flags); | |
e468c048 TS |
413 | if (drv->blocked) |
414 | goto exit; | |
70440cf2 | 415 | for (i = 0; i < drv->minors; ++i) { |
e468c048 TS |
416 | cs = drv->cs + i; |
417 | if (!(cs->flags & VALID_MINOR)) { | |
418 | cs->flags = VALID_MINOR; | |
419 | ret = cs; | |
70440cf2 | 420 | break; |
e702ff0b | 421 | } |
70440cf2 | 422 | } |
e468c048 | 423 | exit: |
70440cf2 TS |
424 | spin_unlock_irqrestore(&drv->lock, flags); |
425 | return ret; | |
426 | } | |
427 | ||
428 | static void free_cs(struct cardstate *cs) | |
429 | { | |
e468c048 | 430 | cs->flags = 0; |
70440cf2 TS |
431 | } |
432 | ||
433 | static void make_valid(struct cardstate *cs, unsigned mask) | |
434 | { | |
435 | unsigned long flags; | |
436 | struct gigaset_driver *drv = cs->driver; | |
437 | spin_lock_irqsave(&drv->lock, flags); | |
e468c048 | 438 | cs->flags |= mask; |
70440cf2 TS |
439 | spin_unlock_irqrestore(&drv->lock, flags); |
440 | } | |
441 | ||
442 | static void make_invalid(struct cardstate *cs, unsigned mask) | |
443 | { | |
444 | unsigned long flags; | |
445 | struct gigaset_driver *drv = cs->driver; | |
446 | spin_lock_irqsave(&drv->lock, flags); | |
e468c048 | 447 | cs->flags &= ~mask; |
70440cf2 TS |
448 | spin_unlock_irqrestore(&drv->lock, flags); |
449 | } | |
450 | ||
1cec9727 TS |
451 | /** |
452 | * gigaset_freecs() - free all associated ressources of a device | |
453 | * @cs: device descriptor structure. | |
454 | * | |
455 | * Stops all tasklets and timers, unregisters the device from all | |
456 | * subsystems it was registered to, deallocates the device structure | |
457 | * @cs and all structures referenced from it. | |
458 | * Operations on the device should be stopped before calling this. | |
459 | */ | |
6fd5ea63 HL |
460 | void gigaset_freecs(struct cardstate *cs) |
461 | { | |
462 | int i; | |
463 | unsigned long flags; | |
464 | ||
465 | if (!cs) | |
466 | return; | |
467 | ||
abfd1dc7 | 468 | mutex_lock(&cs->mutex); |
6fd5ea63 | 469 | |
6fd5ea63 | 470 | spin_lock_irqsave(&cs->lock, flags); |
69049cc8 | 471 | cs->running = 0; |
917f5085 TS |
472 | spin_unlock_irqrestore(&cs->lock, flags); /* event handler and timer are |
473 | not rescheduled below */ | |
6fd5ea63 HL |
474 | |
475 | tasklet_kill(&cs->event_tasklet); | |
476 | del_timer_sync(&cs->timer); | |
477 | ||
478 | switch (cs->cs_init) { | |
479 | default: | |
088ec0cc TS |
480 | /* clear B channel structures */ |
481 | for (i = 0; i < cs->channels; ++i) { | |
482 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i); | |
483 | gigaset_freebcs(cs->bcs + i); | |
484 | } | |
485 | ||
3dda4e37 HL |
486 | /* clear device sysfs */ |
487 | gigaset_free_dev_sysfs(cs); | |
488 | ||
6fd5ea63 HL |
489 | gigaset_if_free(cs); |
490 | ||
784d5858 | 491 | gig_dbg(DEBUG_INIT, "clearing hw"); |
6fd5ea63 HL |
492 | cs->ops->freecshw(cs); |
493 | ||
6fd5ea63 HL |
494 | /* fall through */ |
495 | case 2: /* error in initcshw */ | |
496 | /* Deregister from LL */ | |
497 | make_invalid(cs, VALID_ID); | |
bc35b4e3 | 498 | gigaset_isdn_unregdev(cs); |
6fd5ea63 HL |
499 | |
500 | /* fall through */ | |
088ec0cc | 501 | case 1: /* error when registering to LL */ |
784d5858 | 502 | gig_dbg(DEBUG_INIT, "clearing at_state"); |
6fd5ea63 | 503 | clear_at_state(&cs->at_state); |
7643ffbd | 504 | dealloc_temp_at_states(cs); |
bc882b18 | 505 | clear_events(cs); |
1862c14e | 506 | tty_port_destroy(&cs->port); |
6fd5ea63 HL |
507 | |
508 | /* fall through */ | |
088ec0cc | 509 | case 0: /* error in basic setup */ |
784d5858 | 510 | gig_dbg(DEBUG_INIT, "freeing inbuf"); |
6fd5ea63 | 511 | kfree(cs->inbuf); |
bc882b18 | 512 | kfree(cs->bcs); |
6fd5ea63 | 513 | } |
bc882b18 | 514 | |
abfd1dc7 | 515 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
516 | free_cs(cs); |
517 | } | |
518 | EXPORT_SYMBOL_GPL(gigaset_freecs); | |
519 | ||
520 | void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs, | |
784d5858 | 521 | struct cardstate *cs, int cid) |
6fd5ea63 HL |
522 | { |
523 | int i; | |
524 | ||
525 | INIT_LIST_HEAD(&at_state->list); | |
526 | at_state->waiting = 0; | |
527 | at_state->getstring = 0; | |
528 | at_state->pending_commands = 0; | |
529 | at_state->timer_expires = 0; | |
530 | at_state->timer_active = 0; | |
69049cc8 TS |
531 | at_state->timer_index = 0; |
532 | at_state->seq_index = 0; | |
6fd5ea63 HL |
533 | at_state->ConState = 0; |
534 | for (i = 0; i < STR_NUM; ++i) | |
535 | at_state->str_var[i] = NULL; | |
536 | at_state->int_var[VAR_ZDLE] = 0; | |
537 | at_state->int_var[VAR_ZCTP] = -1; | |
538 | at_state->int_var[VAR_ZSAU] = ZSAU_NULL; | |
539 | at_state->cs = cs; | |
540 | at_state->bcs = bcs; | |
541 | at_state->cid = cid; | |
542 | if (!cid) | |
543 | at_state->replystruct = cs->tabnocid; | |
544 | else | |
545 | at_state->replystruct = cs->tabcid; | |
546 | } | |
547 | ||
548 | ||
2032e2c2 | 549 | static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct cardstate *cs) |
6fd5ea63 HL |
550 | /* inbuf->read must be allocated before! */ |
551 | { | |
9d4bee2b TS |
552 | inbuf->head = 0; |
553 | inbuf->tail = 0; | |
6fd5ea63 | 554 | inbuf->cs = cs; |
2032e2c2 | 555 | inbuf->inputstate = INS_command; |
6fd5ea63 HL |
556 | } |
557 | ||
1cec9727 TS |
558 | /** |
559 | * gigaset_fill_inbuf() - append received data to input buffer | |
560 | * @inbuf: buffer structure. | |
561 | * @src: received data. | |
562 | * @numbytes: number of bytes received. | |
81fa7b82 TS |
563 | * |
564 | * Return value: !=0 if some data was appended | |
1cec9727 | 565 | */ |
714e8236 TS |
566 | int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src, |
567 | unsigned numbytes) | |
568 | { | |
569 | unsigned n, head, tail, bytesleft; | |
570 | ||
571 | gig_dbg(DEBUG_INTR, "received %u bytes", numbytes); | |
572 | ||
573 | if (!numbytes) | |
574 | return 0; | |
575 | ||
576 | bytesleft = numbytes; | |
9d4bee2b TS |
577 | tail = inbuf->tail; |
578 | head = inbuf->head; | |
714e8236 TS |
579 | gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail); |
580 | ||
581 | while (bytesleft) { | |
582 | if (head > tail) | |
583 | n = head - 1 - tail; | |
584 | else if (head == 0) | |
475be4d8 | 585 | n = (RBUFSIZE - 1) - tail; |
714e8236 TS |
586 | else |
587 | n = RBUFSIZE - tail; | |
588 | if (!n) { | |
589 | dev_err(inbuf->cs->dev, | |
898eb71c JP |
590 | "buffer overflow (%u bytes lost)\n", |
591 | bytesleft); | |
714e8236 TS |
592 | break; |
593 | } | |
594 | if (n > bytesleft) | |
595 | n = bytesleft; | |
596 | memcpy(inbuf->data + tail, src, n); | |
597 | bytesleft -= n; | |
598 | tail = (tail + n) % RBUFSIZE; | |
599 | src += n; | |
600 | } | |
601 | gig_dbg(DEBUG_INTR, "setting tail to %u", tail); | |
9d4bee2b | 602 | inbuf->tail = tail; |
714e8236 TS |
603 | return numbytes != bytesleft; |
604 | } | |
605 | EXPORT_SYMBOL_GPL(gigaset_fill_inbuf); | |
606 | ||
6fd5ea63 | 607 | /* Initialize the b-channel structure */ |
81fa7b82 TS |
608 | static int gigaset_initbcs(struct bc_state *bcs, struct cardstate *cs, |
609 | int channel) | |
6fd5ea63 HL |
610 | { |
611 | int i; | |
612 | ||
d9ba9c91 | 613 | bcs->tx_skb = NULL; |
6fd5ea63 HL |
614 | |
615 | skb_queue_head_init(&bcs->squeue); | |
616 | ||
617 | bcs->corrupted = 0; | |
618 | bcs->trans_down = 0; | |
619 | bcs->trans_up = 0; | |
620 | ||
784d5858 | 621 | gig_dbg(DEBUG_INIT, "setting up bcs[%d]->at_state", channel); |
6fd5ea63 HL |
622 | gigaset_at_init(&bcs->at_state, bcs, cs, -1); |
623 | ||
6fd5ea63 HL |
624 | #ifdef CONFIG_GIGASET_DEBUG |
625 | bcs->emptycount = 0; | |
626 | #endif | |
627 | ||
e7752ee2 TS |
628 | bcs->rx_bufsize = 0; |
629 | bcs->rx_skb = NULL; | |
630 | bcs->rx_fcs = PPP_INITFCS; | |
6fd5ea63 | 631 | bcs->inputstate = 0; |
6fd5ea63 HL |
632 | bcs->channel = channel; |
633 | bcs->cs = cs; | |
634 | ||
635 | bcs->chstate = 0; | |
636 | bcs->use_count = 1; | |
637 | bcs->busy = 0; | |
638 | bcs->ignore = cs->ignoreframes; | |
639 | ||
640 | for (i = 0; i < AT_NUM; ++i) | |
641 | bcs->commands[i] = NULL; | |
642 | ||
1b4843c5 TS |
643 | spin_lock_init(&bcs->aplock); |
644 | bcs->ap = NULL; | |
645 | bcs->apconnstate = 0; | |
646 | ||
784d5858 | 647 | gig_dbg(DEBUG_INIT, " setting up bcs[%d]->hw", channel); |
81fa7b82 | 648 | return cs->ops->initbcshw(bcs); |
6fd5ea63 HL |
649 | } |
650 | ||
1cec9727 TS |
651 | /** |
652 | * gigaset_initcs() - initialize device structure | |
653 | * @drv: hardware driver the device belongs to | |
654 | * @channels: number of B channels supported by device | |
655 | * @onechannel: !=0 if B channel data and AT commands share one | |
656 | * communication channel (M10x), | |
657 | * ==0 if B channels have separate communication channels (base) | |
658 | * @ignoreframes: number of frames to ignore after setting up B channel | |
659 | * @cidmode: !=0: start in CallID mode | |
660 | * @modulename: name of driver module for LL registration | |
661 | * | |
6fd5ea63 HL |
662 | * Allocate and initialize cardstate structure for Gigaset driver |
663 | * Calls hardware dependent gigaset_initcshw() function | |
664 | * Calls B channel initialization function gigaset_initbcs() for each B channel | |
1cec9727 TS |
665 | * |
666 | * Return value: | |
6fd5ea63 HL |
667 | * pointer to cardstate structure |
668 | */ | |
669 | struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels, | |
670 | int onechannel, int ignoreframes, | |
671 | int cidmode, const char *modulename) | |
672 | { | |
d9ba9c91 | 673 | struct cardstate *cs; |
69049cc8 | 674 | unsigned long flags; |
6fd5ea63 HL |
675 | int i; |
676 | ||
784d5858 | 677 | gig_dbg(DEBUG_INIT, "allocating cs"); |
d9ba9c91 TS |
678 | cs = alloc_cs(drv); |
679 | if (!cs) { | |
c8770dca | 680 | pr_err("maximum number of devices exceeded\n"); |
e702ff0b TS |
681 | return NULL; |
682 | } | |
e702ff0b | 683 | |
6fd5ea63 HL |
684 | cs->cs_init = 0; |
685 | cs->channels = channels; | |
686 | cs->onechannel = onechannel; | |
687 | cs->ignoreframes = ignoreframes; | |
688 | INIT_LIST_HEAD(&cs->temp_at_states); | |
69049cc8 | 689 | cs->running = 0; |
6fd5ea63 HL |
690 | init_timer(&cs->timer); /* clear next & prev */ |
691 | spin_lock_init(&cs->ev_lock); | |
69049cc8 TS |
692 | cs->ev_tail = 0; |
693 | cs->ev_head = 0; | |
abfd1dc7 | 694 | |
5452fee2 | 695 | tasklet_init(&cs->event_tasklet, gigaset_handle_event, |
917f5085 | 696 | (unsigned long) cs); |
48a7466f | 697 | tty_port_init(&cs->port); |
9d4bee2b | 698 | cs->commands_pending = 0; |
6fd5ea63 HL |
699 | cs->cur_at_seq = 0; |
700 | cs->gotfwver = -1; | |
784d5858 | 701 | cs->dev = NULL; |
01107d34 | 702 | cs->tty_dev = NULL; |
69049cc8 | 703 | cs->cidmode = cidmode != 0; |
528efc6a TS |
704 | cs->tabnocid = gigaset_tab_nocid; |
705 | cs->tabcid = gigaset_tab_cid; | |
6fd5ea63 HL |
706 | |
707 | init_waitqueue_head(&cs->waitqueue); | |
708 | cs->waiting = 0; | |
709 | ||
9d4bee2b TS |
710 | cs->mode = M_UNKNOWN; |
711 | cs->mstate = MS_UNINITIALIZED; | |
6fd5ea63 | 712 | |
bc882b18 TS |
713 | cs->bcs = kmalloc(channels * sizeof(struct bc_state), GFP_KERNEL); |
714 | cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL); | |
715 | if (!cs->bcs || !cs->inbuf) { | |
716 | pr_err("out of memory\n"); | |
717 | goto error; | |
718 | } | |
6fd5ea63 HL |
719 | ++cs->cs_init; |
720 | ||
784d5858 | 721 | gig_dbg(DEBUG_INIT, "setting up at_state"); |
6fd5ea63 HL |
722 | spin_lock_init(&cs->lock); |
723 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
724 | cs->dle = 0; | |
725 | cs->cbytes = 0; | |
726 | ||
784d5858 | 727 | gig_dbg(DEBUG_INIT, "setting up inbuf"); |
2032e2c2 | 728 | gigaset_inbuf_init(cs->inbuf, cs); |
6fd5ea63 | 729 | |
69049cc8 TS |
730 | cs->connected = 0; |
731 | cs->isdn_up = 0; | |
6fd5ea63 | 732 | |
784d5858 | 733 | gig_dbg(DEBUG_INIT, "setting up cmdbuf"); |
6fd5ea63 HL |
734 | cs->cmdbuf = cs->lastcmdbuf = NULL; |
735 | spin_lock_init(&cs->cmdlock); | |
736 | cs->curlen = 0; | |
737 | cs->cmdbytes = 0; | |
738 | ||
784d5858 | 739 | gig_dbg(DEBUG_INIT, "setting up iif"); |
81fa7b82 | 740 | if (gigaset_isdn_regdev(cs, modulename) < 0) { |
c8770dca | 741 | pr_err("error registering ISDN device\n"); |
1862c14e | 742 | goto error; |
6fd5ea63 HL |
743 | } |
744 | ||
745 | make_valid(cs, VALID_ID); | |
746 | ++cs->cs_init; | |
784d5858 | 747 | gig_dbg(DEBUG_INIT, "setting up hw"); |
81fa7b82 | 748 | if (cs->ops->initcshw(cs) < 0) |
1862c14e | 749 | goto error; |
6fd5ea63 HL |
750 | |
751 | ++cs->cs_init; | |
752 | ||
7435f50e | 753 | /* set up character device */ |
6fd5ea63 HL |
754 | gigaset_if_init(cs); |
755 | ||
3dda4e37 HL |
756 | /* set up device sysfs */ |
757 | gigaset_init_dev_sysfs(cs); | |
758 | ||
088ec0cc TS |
759 | /* set up channel data structures */ |
760 | for (i = 0; i < channels; ++i) { | |
761 | gig_dbg(DEBUG_INIT, "setting up bcs[%d]", i); | |
81fa7b82 | 762 | if (gigaset_initbcs(cs->bcs + i, cs, i) < 0) { |
088ec0cc | 763 | pr_err("could not allocate channel %d data\n", i); |
1862c14e | 764 | goto error; |
088ec0cc TS |
765 | } |
766 | } | |
767 | ||
69049cc8 TS |
768 | spin_lock_irqsave(&cs->lock, flags); |
769 | cs->running = 1; | |
770 | spin_unlock_irqrestore(&cs->lock, flags); | |
ec81b5e6 TS |
771 | setup_timer(&cs->timer, timer_tick, (unsigned long) cs); |
772 | cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK); | |
6fd5ea63 HL |
773 | add_timer(&cs->timer); |
774 | ||
784d5858 | 775 | gig_dbg(DEBUG_INIT, "cs initialized"); |
6fd5ea63 | 776 | return cs; |
1862c14e | 777 | |
e702ff0b | 778 | error: |
784d5858 | 779 | gig_dbg(DEBUG_INIT, "failed"); |
6fd5ea63 HL |
780 | gigaset_freecs(cs); |
781 | return NULL; | |
782 | } | |
783 | EXPORT_SYMBOL_GPL(gigaset_initcs); | |
784 | ||
73a88814 | 785 | /* ReInitialize the b-channel structure on hangup */ |
6fd5ea63 HL |
786 | void gigaset_bcs_reinit(struct bc_state *bcs) |
787 | { | |
788 | struct sk_buff *skb; | |
789 | struct cardstate *cs = bcs->cs; | |
790 | unsigned long flags; | |
791 | ||
792 | while ((skb = skb_dequeue(&bcs->squeue)) != NULL) | |
793 | dev_kfree_skb(skb); | |
794 | ||
917f5085 | 795 | spin_lock_irqsave(&cs->lock, flags); |
6fd5ea63 HL |
796 | clear_at_state(&bcs->at_state); |
797 | bcs->at_state.ConState = 0; | |
798 | bcs->at_state.timer_active = 0; | |
799 | bcs->at_state.timer_expires = 0; | |
784d5858 | 800 | bcs->at_state.cid = -1; /* No CID defined */ |
6fd5ea63 HL |
801 | spin_unlock_irqrestore(&cs->lock, flags); |
802 | ||
803 | bcs->inputstate = 0; | |
804 | ||
805 | #ifdef CONFIG_GIGASET_DEBUG | |
806 | bcs->emptycount = 0; | |
807 | #endif | |
808 | ||
e7752ee2 | 809 | bcs->rx_fcs = PPP_INITFCS; |
6fd5ea63 HL |
810 | bcs->chstate = 0; |
811 | ||
812 | bcs->ignore = cs->ignoreframes; | |
e7752ee2 TS |
813 | dev_kfree_skb(bcs->rx_skb); |
814 | bcs->rx_skb = NULL; | |
6fd5ea63 HL |
815 | |
816 | cs->ops->reinitbcshw(bcs); | |
817 | } | |
818 | ||
819 | static void cleanup_cs(struct cardstate *cs) | |
820 | { | |
821 | struct cmdbuf_t *cb, *tcb; | |
822 | int i; | |
823 | unsigned long flags; | |
824 | ||
825 | spin_lock_irqsave(&cs->lock, flags); | |
826 | ||
9d4bee2b TS |
827 | cs->mode = M_UNKNOWN; |
828 | cs->mstate = MS_UNINITIALIZED; | |
6fd5ea63 HL |
829 | |
830 | clear_at_state(&cs->at_state); | |
7643ffbd | 831 | dealloc_temp_at_states(cs); |
6fd5ea63 HL |
832 | gigaset_at_init(&cs->at_state, NULL, cs, 0); |
833 | ||
6fd5ea63 | 834 | cs->inbuf->inputstate = INS_command; |
9d4bee2b TS |
835 | cs->inbuf->head = 0; |
836 | cs->inbuf->tail = 0; | |
6fd5ea63 HL |
837 | |
838 | cb = cs->cmdbuf; | |
839 | while (cb) { | |
840 | tcb = cb; | |
841 | cb = cb->next; | |
842 | kfree(tcb); | |
843 | } | |
844 | cs->cmdbuf = cs->lastcmdbuf = NULL; | |
845 | cs->curlen = 0; | |
846 | cs->cmdbytes = 0; | |
847 | cs->gotfwver = -1; | |
848 | cs->dle = 0; | |
849 | cs->cur_at_seq = 0; | |
9d4bee2b | 850 | cs->commands_pending = 0; |
6fd5ea63 HL |
851 | cs->cbytes = 0; |
852 | ||
853 | spin_unlock_irqrestore(&cs->lock, flags); | |
854 | ||
855 | for (i = 0; i < cs->channels; ++i) { | |
856 | gigaset_freebcs(cs->bcs + i); | |
81fa7b82 | 857 | if (gigaset_initbcs(cs->bcs + i, cs, i) < 0) |
c8770dca | 858 | pr_err("could not allocate channel %d data\n", i); |
6fd5ea63 HL |
859 | } |
860 | ||
861 | if (cs->waiting) { | |
862 | cs->cmd_result = -ENODEV; | |
863 | cs->waiting = 0; | |
864 | wake_up_interruptible(&cs->waitqueue); | |
865 | } | |
866 | } | |
867 | ||
868 | ||
1cec9727 TS |
869 | /** |
870 | * gigaset_start() - start device operations | |
871 | * @cs: device descriptor structure. | |
872 | * | |
873 | * Prepares the device for use by setting up communication parameters, | |
874 | * scheduling an EV_START event to initiate device initialization, and | |
875 | * waiting for completion of the initialization. | |
876 | * | |
877 | * Return value: | |
81fa7b82 | 878 | * 0 on success, error code < 0 on failure |
1cec9727 | 879 | */ |
6fd5ea63 HL |
880 | int gigaset_start(struct cardstate *cs) |
881 | { | |
69049cc8 TS |
882 | unsigned long flags; |
883 | ||
abfd1dc7 | 884 | if (mutex_lock_interruptible(&cs->mutex)) |
81fa7b82 | 885 | return -EBUSY; |
6fd5ea63 | 886 | |
69049cc8 TS |
887 | spin_lock_irqsave(&cs->lock, flags); |
888 | cs->connected = 1; | |
889 | spin_unlock_irqrestore(&cs->lock, flags); | |
6fd5ea63 | 890 | |
9d4bee2b | 891 | if (cs->mstate != MS_LOCKED) { |
475be4d8 | 892 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR | TIOCM_RTS); |
6fd5ea63 HL |
893 | cs->ops->baud_rate(cs, B115200); |
894 | cs->ops->set_line_ctrl(cs, CS8); | |
475be4d8 | 895 | cs->control_state = TIOCM_DTR | TIOCM_RTS; |
6fd5ea63 HL |
896 | } |
897 | ||
898 | cs->waiting = 1; | |
899 | ||
900 | if (!gigaset_add_event(cs, &cs->at_state, EV_START, NULL, 0, NULL)) { | |
901 | cs->waiting = 0; | |
6fd5ea63 HL |
902 | goto error; |
903 | } | |
6fd5ea63 HL |
904 | gigaset_schedule_event(cs); |
905 | ||
906 | wait_event(cs->waitqueue, !cs->waiting); | |
907 | ||
abfd1dc7 | 908 | mutex_unlock(&cs->mutex); |
81fa7b82 | 909 | return 0; |
6fd5ea63 HL |
910 | |
911 | error: | |
abfd1dc7 | 912 | mutex_unlock(&cs->mutex); |
81fa7b82 | 913 | return -ENOMEM; |
6fd5ea63 HL |
914 | } |
915 | EXPORT_SYMBOL_GPL(gigaset_start); | |
916 | ||
1cec9727 TS |
917 | /** |
918 | * gigaset_shutdown() - shut down device operations | |
919 | * @cs: device descriptor structure. | |
920 | * | |
921 | * Deactivates the device by scheduling an EV_SHUTDOWN event and | |
922 | * waiting for completion of the shutdown. | |
923 | * | |
924 | * Return value: | |
81fa7b82 | 925 | * 0 - success, -ENODEV - error (no device associated) |
e468c048 TS |
926 | */ |
927 | int gigaset_shutdown(struct cardstate *cs) | |
6fd5ea63 | 928 | { |
abfd1dc7 | 929 | mutex_lock(&cs->mutex); |
6fd5ea63 | 930 | |
5d49c101 TS |
931 | if (!(cs->flags & VALID_MINOR)) { |
932 | mutex_unlock(&cs->mutex); | |
81fa7b82 | 933 | return -ENODEV; |
5d49c101 | 934 | } |
e468c048 | 935 | |
6fd5ea63 HL |
936 | cs->waiting = 1; |
937 | ||
1528b18f | 938 | if (!gigaset_add_event(cs, &cs->at_state, EV_SHUTDOWN, NULL, 0, NULL)) |
6fd5ea63 | 939 | goto exit; |
6fd5ea63 HL |
940 | gigaset_schedule_event(cs); |
941 | ||
2869b23e | 942 | wait_event(cs->waitqueue, !cs->waiting); |
6fd5ea63 HL |
943 | |
944 | cleanup_cs(cs); | |
945 | ||
946 | exit: | |
abfd1dc7 | 947 | mutex_unlock(&cs->mutex); |
e468c048 | 948 | return 0; |
6fd5ea63 HL |
949 | } |
950 | EXPORT_SYMBOL_GPL(gigaset_shutdown); | |
951 | ||
1cec9727 TS |
952 | /** |
953 | * gigaset_stop() - stop device operations | |
954 | * @cs: device descriptor structure. | |
955 | * | |
956 | * Stops operations on the device by scheduling an EV_STOP event and | |
957 | * waiting for completion of the shutdown. | |
958 | */ | |
6fd5ea63 HL |
959 | void gigaset_stop(struct cardstate *cs) |
960 | { | |
abfd1dc7 | 961 | mutex_lock(&cs->mutex); |
6fd5ea63 | 962 | |
6fd5ea63 HL |
963 | cs->waiting = 1; |
964 | ||
1528b18f | 965 | if (!gigaset_add_event(cs, &cs->at_state, EV_STOP, NULL, 0, NULL)) |
6fd5ea63 | 966 | goto exit; |
6fd5ea63 HL |
967 | gigaset_schedule_event(cs); |
968 | ||
2869b23e | 969 | wait_event(cs->waitqueue, !cs->waiting); |
6fd5ea63 | 970 | |
6fd5ea63 HL |
971 | cleanup_cs(cs); |
972 | ||
973 | exit: | |
abfd1dc7 | 974 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
975 | } |
976 | EXPORT_SYMBOL_GPL(gigaset_stop); | |
977 | ||
978 | static LIST_HEAD(drivers); | |
34af946a | 979 | static DEFINE_SPINLOCK(driver_lock); |
6fd5ea63 HL |
980 | |
981 | struct cardstate *gigaset_get_cs_by_id(int id) | |
982 | { | |
983 | unsigned long flags; | |
35dc8457 TS |
984 | struct cardstate *ret = NULL; |
985 | struct cardstate *cs; | |
6fd5ea63 HL |
986 | struct gigaset_driver *drv; |
987 | unsigned i; | |
988 | ||
989 | spin_lock_irqsave(&driver_lock, flags); | |
990 | list_for_each_entry(drv, &drivers, list) { | |
991 | spin_lock(&drv->lock); | |
992 | for (i = 0; i < drv->minors; ++i) { | |
e468c048 TS |
993 | cs = drv->cs + i; |
994 | if ((cs->flags & VALID_ID) && cs->myid == id) { | |
995 | ret = cs; | |
6fd5ea63 | 996 | break; |
e468c048 | 997 | } |
6fd5ea63 HL |
998 | } |
999 | spin_unlock(&drv->lock); | |
1000 | if (ret) | |
1001 | break; | |
1002 | } | |
1003 | spin_unlock_irqrestore(&driver_lock, flags); | |
1004 | return ret; | |
1005 | } | |
1006 | ||
8ca445df | 1007 | static struct cardstate *gigaset_get_cs_by_minor(unsigned minor) |
6fd5ea63 HL |
1008 | { |
1009 | unsigned long flags; | |
35dc8457 | 1010 | struct cardstate *ret = NULL; |
6fd5ea63 HL |
1011 | struct gigaset_driver *drv; |
1012 | unsigned index; | |
1013 | ||
1014 | spin_lock_irqsave(&driver_lock, flags); | |
1015 | list_for_each_entry(drv, &drivers, list) { | |
1016 | if (minor < drv->minor || minor >= drv->minor + drv->minors) | |
1017 | continue; | |
1018 | index = minor - drv->minor; | |
1019 | spin_lock(&drv->lock); | |
e468c048 | 1020 | if (drv->cs[index].flags & VALID_MINOR) |
6fd5ea63 HL |
1021 | ret = drv->cs + index; |
1022 | spin_unlock(&drv->lock); | |
1023 | if (ret) | |
1024 | break; | |
1025 | } | |
1026 | spin_unlock_irqrestore(&driver_lock, flags); | |
1027 | return ret; | |
1028 | } | |
1029 | ||
8ca445df AB |
1030 | struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty) |
1031 | { | |
8ca445df AB |
1032 | return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start); |
1033 | } | |
1034 | ||
1cec9727 TS |
1035 | /** |
1036 | * gigaset_freedriver() - free all associated ressources of a driver | |
1037 | * @drv: driver descriptor structure. | |
1038 | * | |
1039 | * Unregisters the driver from the system and deallocates the driver | |
1040 | * structure @drv and all structures referenced from it. | |
1041 | * All devices should be shut down before calling this. | |
1042 | */ | |
6fd5ea63 HL |
1043 | void gigaset_freedriver(struct gigaset_driver *drv) |
1044 | { | |
1045 | unsigned long flags; | |
1046 | ||
1047 | spin_lock_irqsave(&driver_lock, flags); | |
1048 | list_del(&drv->list); | |
1049 | spin_unlock_irqrestore(&driver_lock, flags); | |
1050 | ||
1051 | gigaset_if_freedriver(drv); | |
6fd5ea63 HL |
1052 | |
1053 | kfree(drv->cs); | |
6fd5ea63 HL |
1054 | kfree(drv); |
1055 | } | |
1056 | EXPORT_SYMBOL_GPL(gigaset_freedriver); | |
1057 | ||
1cec9727 TS |
1058 | /** |
1059 | * gigaset_initdriver() - initialize driver structure | |
1060 | * @minor: First minor number | |
1061 | * @minors: Number of minors this driver can handle | |
1062 | * @procname: Name of the driver | |
1063 | * @devname: Name of the device files (prefix without minor number) | |
1064 | * | |
6fd5ea63 | 1065 | * Allocate and initialize gigaset_driver structure. Initialize interface. |
1cec9727 TS |
1066 | * |
1067 | * Return value: | |
784d5858 | 1068 | * Pointer to the gigaset_driver structure on success, NULL on failure. |
6fd5ea63 HL |
1069 | */ |
1070 | struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors, | |
784d5858 TS |
1071 | const char *procname, |
1072 | const char *devname, | |
784d5858 TS |
1073 | const struct gigaset_ops *ops, |
1074 | struct module *owner) | |
6fd5ea63 HL |
1075 | { |
1076 | struct gigaset_driver *drv; | |
1077 | unsigned long flags; | |
1078 | unsigned i; | |
1079 | ||
1080 | drv = kmalloc(sizeof *drv, GFP_KERNEL); | |
1081 | if (!drv) | |
1082 | return NULL; | |
f4675c70 | 1083 | |
6fd5ea63 HL |
1084 | drv->have_tty = 0; |
1085 | drv->minor = minor; | |
1086 | drv->minors = minors; | |
1087 | spin_lock_init(&drv->lock); | |
1088 | drv->blocked = 0; | |
1089 | drv->ops = ops; | |
1090 | drv->owner = owner; | |
1091 | INIT_LIST_HEAD(&drv->list); | |
1092 | ||
1093 | drv->cs = kmalloc(minors * sizeof *drv->cs, GFP_KERNEL); | |
1094 | if (!drv->cs) | |
e702ff0b | 1095 | goto error; |
f4675c70 | 1096 | |
6fd5ea63 | 1097 | for (i = 0; i < minors; ++i) { |
e468c048 | 1098 | drv->cs[i].flags = 0; |
6fd5ea63 HL |
1099 | drv->cs[i].driver = drv; |
1100 | drv->cs[i].ops = drv->ops; | |
1101 | drv->cs[i].minor_index = i; | |
5d49c101 | 1102 | mutex_init(&drv->cs[i].mutex); |
6fd5ea63 HL |
1103 | } |
1104 | ||
f4eaa370 | 1105 | gigaset_if_initdriver(drv, procname, devname); |
6fd5ea63 HL |
1106 | |
1107 | spin_lock_irqsave(&driver_lock, flags); | |
1108 | list_add(&drv->list, &drivers); | |
1109 | spin_unlock_irqrestore(&driver_lock, flags); | |
1110 | ||
1111 | return drv; | |
1112 | ||
e702ff0b | 1113 | error: |
6fd5ea63 | 1114 | kfree(drv); |
6fd5ea63 HL |
1115 | return NULL; |
1116 | } | |
1117 | EXPORT_SYMBOL_GPL(gigaset_initdriver); | |
1118 | ||
1cec9727 TS |
1119 | /** |
1120 | * gigaset_blockdriver() - block driver | |
1121 | * @drv: driver descriptor structure. | |
1122 | * | |
1123 | * Prevents the driver from attaching new devices, in preparation for | |
1124 | * deregistration. | |
1125 | */ | |
6fd5ea63 HL |
1126 | void gigaset_blockdriver(struct gigaset_driver *drv) |
1127 | { | |
6fd5ea63 | 1128 | drv->blocked = 1; |
6fd5ea63 HL |
1129 | } |
1130 | EXPORT_SYMBOL_GPL(gigaset_blockdriver); | |
1131 | ||
1132 | static int __init gigaset_init_module(void) | |
1133 | { | |
1134 | /* in accordance with the principle of least astonishment, | |
1135 | * setting the 'debug' parameter to 1 activates a sensible | |
1136 | * set of default debug levels | |
1137 | */ | |
1138 | if (gigaset_debuglevel == 1) | |
1139 | gigaset_debuglevel = DEBUG_DEFAULT; | |
1140 | ||
2038724c | 1141 | pr_info(DRIVER_DESC DRIVER_DESC_DEBUG "\n"); |
bc35b4e3 | 1142 | gigaset_isdn_regdrv(); |
6fd5ea63 HL |
1143 | return 0; |
1144 | } | |
1145 | ||
1146 | static void __exit gigaset_exit_module(void) | |
1147 | { | |
bc35b4e3 | 1148 | gigaset_isdn_unregdrv(); |
6fd5ea63 HL |
1149 | } |
1150 | ||
1151 | module_init(gigaset_init_module); | |
1152 | module_exit(gigaset_exit_module); | |
1153 | ||
1154 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1155 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1156 | ||
1157 | MODULE_LICENSE("GPL"); |