]>
Commit | Line | Data |
---|---|---|
19d337df JB |
1 | /* |
2 | * Copyright (C) 2006 - 2007 Ivo van Doorn | |
3 | * Copyright (C) 2007 Dmitry Torokhov | |
4 | * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the | |
18 | * Free Software Foundation, Inc., | |
19 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/workqueue.h> | |
26 | #include <linux/capability.h> | |
27 | #include <linux/list.h> | |
28 | #include <linux/mutex.h> | |
29 | #include <linux/rfkill.h> | |
30 | #include <linux/spinlock.h> | |
c64fb016 JB |
31 | #include <linux/miscdevice.h> |
32 | #include <linux/wait.h> | |
33 | #include <linux/poll.h> | |
34 | #include <linux/fs.h> | |
19d337df JB |
35 | |
36 | #include "rfkill.h" | |
37 | ||
38 | #define POLL_INTERVAL (5 * HZ) | |
39 | ||
40 | #define RFKILL_BLOCK_HW BIT(0) | |
41 | #define RFKILL_BLOCK_SW BIT(1) | |
42 | #define RFKILL_BLOCK_SW_PREV BIT(2) | |
43 | #define RFKILL_BLOCK_ANY (RFKILL_BLOCK_HW |\ | |
44 | RFKILL_BLOCK_SW |\ | |
45 | RFKILL_BLOCK_SW_PREV) | |
46 | #define RFKILL_BLOCK_SW_SETCALL BIT(31) | |
47 | ||
48 | struct rfkill { | |
49 | spinlock_t lock; | |
50 | ||
51 | const char *name; | |
52 | enum rfkill_type type; | |
53 | ||
54 | unsigned long state; | |
55 | ||
c64fb016 JB |
56 | u32 idx; |
57 | ||
19d337df JB |
58 | bool registered; |
59 | bool suspended; | |
b3fa1329 | 60 | bool persistent; |
19d337df JB |
61 | |
62 | const struct rfkill_ops *ops; | |
63 | void *data; | |
64 | ||
65 | #ifdef CONFIG_RFKILL_LEDS | |
66 | struct led_trigger led_trigger; | |
67 | const char *ledtrigname; | |
68 | #endif | |
69 | ||
70 | struct device dev; | |
71 | struct list_head node; | |
72 | ||
73 | struct delayed_work poll_work; | |
74 | struct work_struct uevent_work; | |
75 | struct work_struct sync_work; | |
76 | }; | |
77 | #define to_rfkill(d) container_of(d, struct rfkill, dev) | |
78 | ||
c64fb016 JB |
79 | struct rfkill_int_event { |
80 | struct list_head list; | |
81 | struct rfkill_event ev; | |
82 | }; | |
83 | ||
84 | struct rfkill_data { | |
85 | struct list_head list; | |
86 | struct list_head events; | |
87 | struct mutex mtx; | |
88 | wait_queue_head_t read_wait; | |
89 | bool input_handler; | |
90 | }; | |
19d337df JB |
91 | |
92 | ||
93 | MODULE_AUTHOR("Ivo van Doorn <IvDoorn@gmail.com>"); | |
94 | MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>"); | |
95 | MODULE_DESCRIPTION("RF switch support"); | |
96 | MODULE_LICENSE("GPL"); | |
97 | ||
98 | ||
99 | /* | |
100 | * The locking here should be made much smarter, we currently have | |
101 | * a bit of a stupid situation because drivers might want to register | |
102 | * the rfkill struct under their own lock, and take this lock during | |
103 | * rfkill method calls -- which will cause an AB-BA deadlock situation. | |
104 | * | |
105 | * To fix that, we need to rework this code here to be mostly lock-free | |
106 | * and only use the mutex for list manipulations, not to protect the | |
107 | * various other global variables. Then we can avoid holding the mutex | |
108 | * around driver operations, and all is happy. | |
109 | */ | |
110 | static LIST_HEAD(rfkill_list); /* list of registered rf switches */ | |
111 | static DEFINE_MUTEX(rfkill_global_mutex); | |
c64fb016 | 112 | static LIST_HEAD(rfkill_fds); /* list of open fds of /dev/rfkill */ |
19d337df JB |
113 | |
114 | static unsigned int rfkill_default_state = 1; | |
115 | module_param_named(default_state, rfkill_default_state, uint, 0444); | |
116 | MODULE_PARM_DESC(default_state, | |
117 | "Default initial state for all radio types, 0 = radio off"); | |
118 | ||
119 | static struct { | |
b3fa1329 | 120 | bool cur, sav; |
19d337df JB |
121 | } rfkill_global_states[NUM_RFKILL_TYPES]; |
122 | ||
19d337df JB |
123 | static bool rfkill_epo_lock_active; |
124 | ||
125 | ||
126 | #ifdef CONFIG_RFKILL_LEDS | |
127 | static void rfkill_led_trigger_event(struct rfkill *rfkill) | |
128 | { | |
129 | struct led_trigger *trigger; | |
130 | ||
131 | if (!rfkill->registered) | |
132 | return; | |
133 | ||
134 | trigger = &rfkill->led_trigger; | |
135 | ||
136 | if (rfkill->state & RFKILL_BLOCK_ANY) | |
137 | led_trigger_event(trigger, LED_OFF); | |
138 | else | |
139 | led_trigger_event(trigger, LED_FULL); | |
140 | } | |
141 | ||
142 | static void rfkill_led_trigger_activate(struct led_classdev *led) | |
143 | { | |
144 | struct rfkill *rfkill; | |
145 | ||
146 | rfkill = container_of(led->trigger, struct rfkill, led_trigger); | |
147 | ||
148 | rfkill_led_trigger_event(rfkill); | |
149 | } | |
150 | ||
151 | const char *rfkill_get_led_trigger_name(struct rfkill *rfkill) | |
152 | { | |
153 | return rfkill->led_trigger.name; | |
154 | } | |
155 | EXPORT_SYMBOL(rfkill_get_led_trigger_name); | |
156 | ||
157 | void rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name) | |
158 | { | |
159 | BUG_ON(!rfkill); | |
160 | ||
161 | rfkill->ledtrigname = name; | |
162 | } | |
163 | EXPORT_SYMBOL(rfkill_set_led_trigger_name); | |
164 | ||
165 | static int rfkill_led_trigger_register(struct rfkill *rfkill) | |
166 | { | |
167 | rfkill->led_trigger.name = rfkill->ledtrigname | |
168 | ? : dev_name(&rfkill->dev); | |
169 | rfkill->led_trigger.activate = rfkill_led_trigger_activate; | |
170 | return led_trigger_register(&rfkill->led_trigger); | |
171 | } | |
172 | ||
173 | static void rfkill_led_trigger_unregister(struct rfkill *rfkill) | |
174 | { | |
175 | led_trigger_unregister(&rfkill->led_trigger); | |
176 | } | |
177 | #else | |
178 | static void rfkill_led_trigger_event(struct rfkill *rfkill) | |
179 | { | |
180 | } | |
181 | ||
182 | static inline int rfkill_led_trigger_register(struct rfkill *rfkill) | |
183 | { | |
184 | return 0; | |
185 | } | |
186 | ||
187 | static inline void rfkill_led_trigger_unregister(struct rfkill *rfkill) | |
188 | { | |
189 | } | |
190 | #endif /* CONFIG_RFKILL_LEDS */ | |
191 | ||
c64fb016 JB |
192 | static void rfkill_fill_event(struct rfkill_event *ev, struct rfkill *rfkill, |
193 | enum rfkill_operation op) | |
194 | { | |
195 | unsigned long flags; | |
196 | ||
197 | ev->idx = rfkill->idx; | |
198 | ev->type = rfkill->type; | |
199 | ev->op = op; | |
200 | ||
201 | spin_lock_irqsave(&rfkill->lock, flags); | |
202 | ev->hard = !!(rfkill->state & RFKILL_BLOCK_HW); | |
203 | ev->soft = !!(rfkill->state & (RFKILL_BLOCK_SW | | |
204 | RFKILL_BLOCK_SW_PREV)); | |
205 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
206 | } | |
207 | ||
208 | static void rfkill_send_events(struct rfkill *rfkill, enum rfkill_operation op) | |
209 | { | |
210 | struct rfkill_data *data; | |
211 | struct rfkill_int_event *ev; | |
212 | ||
213 | list_for_each_entry(data, &rfkill_fds, list) { | |
214 | ev = kzalloc(sizeof(*ev), GFP_KERNEL); | |
215 | if (!ev) | |
216 | continue; | |
217 | rfkill_fill_event(&ev->ev, rfkill, op); | |
218 | mutex_lock(&data->mtx); | |
219 | list_add_tail(&ev->list, &data->events); | |
220 | mutex_unlock(&data->mtx); | |
221 | wake_up_interruptible(&data->read_wait); | |
222 | } | |
223 | } | |
224 | ||
225 | static void rfkill_event(struct rfkill *rfkill) | |
19d337df JB |
226 | { |
227 | if (!rfkill->registered || rfkill->suspended) | |
228 | return; | |
229 | ||
230 | kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE); | |
c64fb016 JB |
231 | |
232 | /* also send event to /dev/rfkill */ | |
233 | rfkill_send_events(rfkill, RFKILL_OP_CHANGE); | |
19d337df JB |
234 | } |
235 | ||
236 | static bool __rfkill_set_hw_state(struct rfkill *rfkill, | |
237 | bool blocked, bool *change) | |
238 | { | |
239 | unsigned long flags; | |
240 | bool prev, any; | |
241 | ||
242 | BUG_ON(!rfkill); | |
243 | ||
244 | spin_lock_irqsave(&rfkill->lock, flags); | |
245 | prev = !!(rfkill->state & RFKILL_BLOCK_HW); | |
246 | if (blocked) | |
247 | rfkill->state |= RFKILL_BLOCK_HW; | |
248 | else | |
249 | rfkill->state &= ~RFKILL_BLOCK_HW; | |
250 | *change = prev != blocked; | |
251 | any = rfkill->state & RFKILL_BLOCK_ANY; | |
252 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
253 | ||
254 | rfkill_led_trigger_event(rfkill); | |
255 | ||
256 | return any; | |
257 | } | |
258 | ||
259 | /** | |
260 | * rfkill_set_block - wrapper for set_block method | |
261 | * | |
262 | * @rfkill: the rfkill struct to use | |
263 | * @blocked: the new software state | |
264 | * | |
265 | * Calls the set_block method (when applicable) and handles notifications | |
266 | * etc. as well. | |
267 | */ | |
268 | static void rfkill_set_block(struct rfkill *rfkill, bool blocked) | |
269 | { | |
270 | unsigned long flags; | |
271 | int err; | |
272 | ||
7fa20a7f AJ |
273 | if (unlikely(rfkill->dev.power.power_state.event & PM_EVENT_SLEEP)) |
274 | return; | |
275 | ||
19d337df JB |
276 | /* |
277 | * Some platforms (...!) generate input events which affect the | |
278 | * _hard_ kill state -- whenever something tries to change the | |
279 | * current software state query the hardware state too. | |
280 | */ | |
281 | if (rfkill->ops->query) | |
282 | rfkill->ops->query(rfkill, rfkill->data); | |
283 | ||
284 | spin_lock_irqsave(&rfkill->lock, flags); | |
285 | if (rfkill->state & RFKILL_BLOCK_SW) | |
286 | rfkill->state |= RFKILL_BLOCK_SW_PREV; | |
287 | else | |
288 | rfkill->state &= ~RFKILL_BLOCK_SW_PREV; | |
289 | ||
290 | if (blocked) | |
291 | rfkill->state |= RFKILL_BLOCK_SW; | |
292 | else | |
293 | rfkill->state &= ~RFKILL_BLOCK_SW; | |
294 | ||
295 | rfkill->state |= RFKILL_BLOCK_SW_SETCALL; | |
296 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
297 | ||
19d337df JB |
298 | err = rfkill->ops->set_block(rfkill->data, blocked); |
299 | ||
300 | spin_lock_irqsave(&rfkill->lock, flags); | |
301 | if (err) { | |
302 | /* | |
303 | * Failed -- reset status to _prev, this may be different | |
304 | * from what set set _PREV to earlier in this function | |
305 | * if rfkill_set_sw_state was invoked. | |
306 | */ | |
307 | if (rfkill->state & RFKILL_BLOCK_SW_PREV) | |
308 | rfkill->state |= RFKILL_BLOCK_SW; | |
309 | else | |
310 | rfkill->state &= ~RFKILL_BLOCK_SW; | |
311 | } | |
312 | rfkill->state &= ~RFKILL_BLOCK_SW_SETCALL; | |
313 | rfkill->state &= ~RFKILL_BLOCK_SW_PREV; | |
314 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
315 | ||
316 | rfkill_led_trigger_event(rfkill); | |
c64fb016 | 317 | rfkill_event(rfkill); |
19d337df JB |
318 | } |
319 | ||
c64fb016 JB |
320 | #ifdef CONFIG_RFKILL_INPUT |
321 | static atomic_t rfkill_input_disabled = ATOMIC_INIT(0); | |
322 | ||
19d337df JB |
323 | /** |
324 | * __rfkill_switch_all - Toggle state of all switches of given type | |
325 | * @type: type of interfaces to be affected | |
326 | * @state: the new state | |
327 | * | |
328 | * This function sets the state of all switches of given type, | |
329 | * unless a specific switch is claimed by userspace (in which case, | |
330 | * that switch is left alone) or suspended. | |
331 | * | |
332 | * Caller must have acquired rfkill_global_mutex. | |
333 | */ | |
334 | static void __rfkill_switch_all(const enum rfkill_type type, bool blocked) | |
335 | { | |
336 | struct rfkill *rfkill; | |
337 | ||
338 | rfkill_global_states[type].cur = blocked; | |
339 | list_for_each_entry(rfkill, &rfkill_list, node) { | |
340 | if (rfkill->type != type) | |
341 | continue; | |
342 | ||
343 | rfkill_set_block(rfkill, blocked); | |
344 | } | |
345 | } | |
346 | ||
347 | /** | |
348 | * rfkill_switch_all - Toggle state of all switches of given type | |
349 | * @type: type of interfaces to be affected | |
350 | * @state: the new state | |
351 | * | |
352 | * Acquires rfkill_global_mutex and calls __rfkill_switch_all(@type, @state). | |
353 | * Please refer to __rfkill_switch_all() for details. | |
354 | * | |
355 | * Does nothing if the EPO lock is active. | |
356 | */ | |
357 | void rfkill_switch_all(enum rfkill_type type, bool blocked) | |
358 | { | |
c64fb016 JB |
359 | if (atomic_read(&rfkill_input_disabled)) |
360 | return; | |
361 | ||
19d337df JB |
362 | mutex_lock(&rfkill_global_mutex); |
363 | ||
364 | if (!rfkill_epo_lock_active) | |
365 | __rfkill_switch_all(type, blocked); | |
366 | ||
367 | mutex_unlock(&rfkill_global_mutex); | |
368 | } | |
369 | ||
370 | /** | |
371 | * rfkill_epo - emergency power off all transmitters | |
372 | * | |
373 | * This kicks all non-suspended rfkill devices to RFKILL_STATE_SOFT_BLOCKED, | |
374 | * ignoring everything in its path but rfkill_global_mutex and rfkill->mutex. | |
375 | * | |
376 | * The global state before the EPO is saved and can be restored later | |
377 | * using rfkill_restore_states(). | |
378 | */ | |
379 | void rfkill_epo(void) | |
380 | { | |
381 | struct rfkill *rfkill; | |
382 | int i; | |
383 | ||
c64fb016 JB |
384 | if (atomic_read(&rfkill_input_disabled)) |
385 | return; | |
386 | ||
19d337df JB |
387 | mutex_lock(&rfkill_global_mutex); |
388 | ||
389 | rfkill_epo_lock_active = true; | |
390 | list_for_each_entry(rfkill, &rfkill_list, node) | |
391 | rfkill_set_block(rfkill, true); | |
392 | ||
393 | for (i = 0; i < NUM_RFKILL_TYPES; i++) { | |
b3fa1329 | 394 | rfkill_global_states[i].sav = rfkill_global_states[i].cur; |
19d337df JB |
395 | rfkill_global_states[i].cur = true; |
396 | } | |
c64fb016 | 397 | |
19d337df JB |
398 | mutex_unlock(&rfkill_global_mutex); |
399 | } | |
400 | ||
401 | /** | |
402 | * rfkill_restore_states - restore global states | |
403 | * | |
404 | * Restore (and sync switches to) the global state from the | |
405 | * states in rfkill_default_states. This can undo the effects of | |
406 | * a call to rfkill_epo(). | |
407 | */ | |
408 | void rfkill_restore_states(void) | |
409 | { | |
410 | int i; | |
411 | ||
c64fb016 JB |
412 | if (atomic_read(&rfkill_input_disabled)) |
413 | return; | |
414 | ||
19d337df JB |
415 | mutex_lock(&rfkill_global_mutex); |
416 | ||
417 | rfkill_epo_lock_active = false; | |
418 | for (i = 0; i < NUM_RFKILL_TYPES; i++) | |
b3fa1329 | 419 | __rfkill_switch_all(i, rfkill_global_states[i].sav); |
19d337df JB |
420 | mutex_unlock(&rfkill_global_mutex); |
421 | } | |
422 | ||
423 | /** | |
424 | * rfkill_remove_epo_lock - unlock state changes | |
425 | * | |
426 | * Used by rfkill-input manually unlock state changes, when | |
427 | * the EPO switch is deactivated. | |
428 | */ | |
429 | void rfkill_remove_epo_lock(void) | |
430 | { | |
c64fb016 JB |
431 | if (atomic_read(&rfkill_input_disabled)) |
432 | return; | |
433 | ||
19d337df JB |
434 | mutex_lock(&rfkill_global_mutex); |
435 | rfkill_epo_lock_active = false; | |
436 | mutex_unlock(&rfkill_global_mutex); | |
437 | } | |
438 | ||
439 | /** | |
440 | * rfkill_is_epo_lock_active - returns true EPO is active | |
441 | * | |
442 | * Returns 0 (false) if there is NOT an active EPO contidion, | |
443 | * and 1 (true) if there is an active EPO contition, which | |
444 | * locks all radios in one of the BLOCKED states. | |
445 | * | |
446 | * Can be called in atomic context. | |
447 | */ | |
448 | bool rfkill_is_epo_lock_active(void) | |
449 | { | |
450 | return rfkill_epo_lock_active; | |
451 | } | |
452 | ||
453 | /** | |
454 | * rfkill_get_global_sw_state - returns global state for a type | |
455 | * @type: the type to get the global state of | |
456 | * | |
457 | * Returns the current global state for a given wireless | |
458 | * device type. | |
459 | */ | |
460 | bool rfkill_get_global_sw_state(const enum rfkill_type type) | |
461 | { | |
462 | return rfkill_global_states[type].cur; | |
463 | } | |
c64fb016 | 464 | #endif |
19d337df | 465 | |
19d337df JB |
466 | |
467 | bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked) | |
468 | { | |
469 | bool ret, change; | |
470 | ||
471 | ret = __rfkill_set_hw_state(rfkill, blocked, &change); | |
472 | ||
473 | if (!rfkill->registered) | |
474 | return ret; | |
475 | ||
476 | if (change) | |
477 | schedule_work(&rfkill->uevent_work); | |
478 | ||
479 | return ret; | |
480 | } | |
481 | EXPORT_SYMBOL(rfkill_set_hw_state); | |
482 | ||
483 | static void __rfkill_set_sw_state(struct rfkill *rfkill, bool blocked) | |
484 | { | |
485 | u32 bit = RFKILL_BLOCK_SW; | |
486 | ||
487 | /* if in a ops->set_block right now, use other bit */ | |
488 | if (rfkill->state & RFKILL_BLOCK_SW_SETCALL) | |
489 | bit = RFKILL_BLOCK_SW_PREV; | |
490 | ||
491 | if (blocked) | |
492 | rfkill->state |= bit; | |
493 | else | |
494 | rfkill->state &= ~bit; | |
495 | } | |
496 | ||
497 | bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked) | |
498 | { | |
499 | unsigned long flags; | |
500 | bool prev, hwblock; | |
501 | ||
502 | BUG_ON(!rfkill); | |
503 | ||
504 | spin_lock_irqsave(&rfkill->lock, flags); | |
505 | prev = !!(rfkill->state & RFKILL_BLOCK_SW); | |
506 | __rfkill_set_sw_state(rfkill, blocked); | |
507 | hwblock = !!(rfkill->state & RFKILL_BLOCK_HW); | |
508 | blocked = blocked || hwblock; | |
509 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
510 | ||
b3fa1329 AJ |
511 | if (!rfkill->registered) { |
512 | rfkill->persistent = true; | |
513 | } else { | |
514 | if (prev != blocked && !hwblock) | |
515 | schedule_work(&rfkill->uevent_work); | |
19d337df | 516 | |
b3fa1329 AJ |
517 | rfkill_led_trigger_event(rfkill); |
518 | } | |
19d337df JB |
519 | |
520 | return blocked; | |
521 | } | |
522 | EXPORT_SYMBOL(rfkill_set_sw_state); | |
523 | ||
524 | void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw) | |
525 | { | |
526 | unsigned long flags; | |
527 | bool swprev, hwprev; | |
528 | ||
529 | BUG_ON(!rfkill); | |
530 | ||
531 | spin_lock_irqsave(&rfkill->lock, flags); | |
532 | ||
533 | /* | |
534 | * No need to care about prev/setblock ... this is for uevent only | |
535 | * and that will get triggered by rfkill_set_block anyway. | |
536 | */ | |
537 | swprev = !!(rfkill->state & RFKILL_BLOCK_SW); | |
538 | hwprev = !!(rfkill->state & RFKILL_BLOCK_HW); | |
539 | __rfkill_set_sw_state(rfkill, sw); | |
540 | ||
541 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
542 | ||
b3fa1329 AJ |
543 | if (!rfkill->registered) { |
544 | rfkill->persistent = true; | |
545 | } else { | |
546 | if (swprev != sw || hwprev != hw) | |
547 | schedule_work(&rfkill->uevent_work); | |
19d337df | 548 | |
b3fa1329 AJ |
549 | rfkill_led_trigger_event(rfkill); |
550 | } | |
19d337df JB |
551 | } |
552 | EXPORT_SYMBOL(rfkill_set_states); | |
553 | ||
554 | static ssize_t rfkill_name_show(struct device *dev, | |
555 | struct device_attribute *attr, | |
556 | char *buf) | |
557 | { | |
558 | struct rfkill *rfkill = to_rfkill(dev); | |
559 | ||
560 | return sprintf(buf, "%s\n", rfkill->name); | |
561 | } | |
562 | ||
563 | static const char *rfkill_get_type_str(enum rfkill_type type) | |
564 | { | |
565 | switch (type) { | |
566 | case RFKILL_TYPE_WLAN: | |
567 | return "wlan"; | |
568 | case RFKILL_TYPE_BLUETOOTH: | |
569 | return "bluetooth"; | |
570 | case RFKILL_TYPE_UWB: | |
571 | return "ultrawideband"; | |
572 | case RFKILL_TYPE_WIMAX: | |
573 | return "wimax"; | |
574 | case RFKILL_TYPE_WWAN: | |
575 | return "wwan"; | |
576 | default: | |
577 | BUG(); | |
578 | } | |
579 | ||
580 | BUILD_BUG_ON(NUM_RFKILL_TYPES != RFKILL_TYPE_WWAN + 1); | |
581 | } | |
582 | ||
583 | static ssize_t rfkill_type_show(struct device *dev, | |
584 | struct device_attribute *attr, | |
585 | char *buf) | |
586 | { | |
587 | struct rfkill *rfkill = to_rfkill(dev); | |
588 | ||
589 | return sprintf(buf, "%s\n", rfkill_get_type_str(rfkill->type)); | |
590 | } | |
591 | ||
c64fb016 JB |
592 | static ssize_t rfkill_idx_show(struct device *dev, |
593 | struct device_attribute *attr, | |
594 | char *buf) | |
595 | { | |
596 | struct rfkill *rfkill = to_rfkill(dev); | |
597 | ||
598 | return sprintf(buf, "%d\n", rfkill->idx); | |
599 | } | |
600 | ||
19d337df JB |
601 | static u8 user_state_from_blocked(unsigned long state) |
602 | { | |
603 | if (state & RFKILL_BLOCK_HW) | |
604 | return RFKILL_USER_STATE_HARD_BLOCKED; | |
605 | if (state & RFKILL_BLOCK_SW) | |
606 | return RFKILL_USER_STATE_SOFT_BLOCKED; | |
607 | ||
608 | return RFKILL_USER_STATE_UNBLOCKED; | |
609 | } | |
610 | ||
611 | static ssize_t rfkill_state_show(struct device *dev, | |
612 | struct device_attribute *attr, | |
613 | char *buf) | |
614 | { | |
615 | struct rfkill *rfkill = to_rfkill(dev); | |
616 | unsigned long flags; | |
617 | u32 state; | |
618 | ||
619 | spin_lock_irqsave(&rfkill->lock, flags); | |
620 | state = rfkill->state; | |
621 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
622 | ||
623 | return sprintf(buf, "%d\n", user_state_from_blocked(state)); | |
624 | } | |
625 | ||
626 | static ssize_t rfkill_state_store(struct device *dev, | |
627 | struct device_attribute *attr, | |
628 | const char *buf, size_t count) | |
629 | { | |
630 | /* | |
631 | * The intention was that userspace can only take control over | |
632 | * a given device when/if rfkill-input doesn't control it due | |
633 | * to user_claim. Since user_claim is currently unsupported, | |
634 | * we never support changing the state from userspace -- this | |
635 | * can be implemented again later. | |
636 | */ | |
637 | ||
638 | return -EPERM; | |
639 | } | |
640 | ||
641 | static ssize_t rfkill_claim_show(struct device *dev, | |
642 | struct device_attribute *attr, | |
643 | char *buf) | |
644 | { | |
645 | return sprintf(buf, "%d\n", 0); | |
646 | } | |
647 | ||
648 | static ssize_t rfkill_claim_store(struct device *dev, | |
649 | struct device_attribute *attr, | |
650 | const char *buf, size_t count) | |
651 | { | |
652 | return -EOPNOTSUPP; | |
653 | } | |
654 | ||
655 | static struct device_attribute rfkill_dev_attrs[] = { | |
656 | __ATTR(name, S_IRUGO, rfkill_name_show, NULL), | |
657 | __ATTR(type, S_IRUGO, rfkill_type_show, NULL), | |
c64fb016 | 658 | __ATTR(index, S_IRUGO, rfkill_idx_show, NULL), |
19d337df JB |
659 | __ATTR(state, S_IRUGO|S_IWUSR, rfkill_state_show, rfkill_state_store), |
660 | __ATTR(claim, S_IRUGO|S_IWUSR, rfkill_claim_show, rfkill_claim_store), | |
661 | __ATTR_NULL | |
662 | }; | |
663 | ||
664 | static void rfkill_release(struct device *dev) | |
665 | { | |
666 | struct rfkill *rfkill = to_rfkill(dev); | |
667 | ||
668 | kfree(rfkill); | |
669 | } | |
670 | ||
671 | static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env) | |
672 | { | |
673 | struct rfkill *rfkill = to_rfkill(dev); | |
674 | unsigned long flags; | |
675 | u32 state; | |
676 | int error; | |
677 | ||
678 | error = add_uevent_var(env, "RFKILL_NAME=%s", rfkill->name); | |
679 | if (error) | |
680 | return error; | |
681 | error = add_uevent_var(env, "RFKILL_TYPE=%s", | |
682 | rfkill_get_type_str(rfkill->type)); | |
683 | if (error) | |
684 | return error; | |
685 | spin_lock_irqsave(&rfkill->lock, flags); | |
686 | state = rfkill->state; | |
687 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
688 | error = add_uevent_var(env, "RFKILL_STATE=%d", | |
689 | user_state_from_blocked(state)); | |
690 | return error; | |
691 | } | |
692 | ||
693 | void rfkill_pause_polling(struct rfkill *rfkill) | |
694 | { | |
695 | BUG_ON(!rfkill); | |
696 | ||
697 | if (!rfkill->ops->poll) | |
698 | return; | |
699 | ||
700 | cancel_delayed_work_sync(&rfkill->poll_work); | |
701 | } | |
702 | EXPORT_SYMBOL(rfkill_pause_polling); | |
703 | ||
704 | void rfkill_resume_polling(struct rfkill *rfkill) | |
705 | { | |
706 | BUG_ON(!rfkill); | |
707 | ||
708 | if (!rfkill->ops->poll) | |
709 | return; | |
710 | ||
711 | schedule_work(&rfkill->poll_work.work); | |
712 | } | |
713 | EXPORT_SYMBOL(rfkill_resume_polling); | |
714 | ||
715 | static int rfkill_suspend(struct device *dev, pm_message_t state) | |
716 | { | |
717 | struct rfkill *rfkill = to_rfkill(dev); | |
718 | ||
719 | rfkill_pause_polling(rfkill); | |
720 | ||
721 | rfkill->suspended = true; | |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
726 | static int rfkill_resume(struct device *dev) | |
727 | { | |
728 | struct rfkill *rfkill = to_rfkill(dev); | |
729 | bool cur; | |
730 | ||
908209c1 | 731 | cur = !!(rfkill->state & RFKILL_BLOCK_SW); |
19d337df | 732 | rfkill_set_block(rfkill, cur); |
19d337df JB |
733 | |
734 | rfkill->suspended = false; | |
735 | ||
19d337df JB |
736 | rfkill_resume_polling(rfkill); |
737 | ||
738 | return 0; | |
739 | } | |
740 | ||
741 | static struct class rfkill_class = { | |
742 | .name = "rfkill", | |
743 | .dev_release = rfkill_release, | |
744 | .dev_attrs = rfkill_dev_attrs, | |
745 | .dev_uevent = rfkill_dev_uevent, | |
746 | .suspend = rfkill_suspend, | |
747 | .resume = rfkill_resume, | |
748 | }; | |
749 | ||
6081162e JB |
750 | bool rfkill_blocked(struct rfkill *rfkill) |
751 | { | |
752 | unsigned long flags; | |
753 | u32 state; | |
754 | ||
755 | spin_lock_irqsave(&rfkill->lock, flags); | |
756 | state = rfkill->state; | |
757 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
758 | ||
759 | return !!(state & RFKILL_BLOCK_ANY); | |
760 | } | |
761 | EXPORT_SYMBOL(rfkill_blocked); | |
762 | ||
19d337df JB |
763 | |
764 | struct rfkill * __must_check rfkill_alloc(const char *name, | |
765 | struct device *parent, | |
766 | const enum rfkill_type type, | |
767 | const struct rfkill_ops *ops, | |
768 | void *ops_data) | |
769 | { | |
770 | struct rfkill *rfkill; | |
771 | struct device *dev; | |
772 | ||
773 | if (WARN_ON(!ops)) | |
774 | return NULL; | |
775 | ||
776 | if (WARN_ON(!ops->set_block)) | |
777 | return NULL; | |
778 | ||
779 | if (WARN_ON(!name)) | |
780 | return NULL; | |
781 | ||
c64fb016 | 782 | if (WARN_ON(type == RFKILL_TYPE_ALL || type >= NUM_RFKILL_TYPES)) |
19d337df JB |
783 | return NULL; |
784 | ||
785 | rfkill = kzalloc(sizeof(*rfkill), GFP_KERNEL); | |
786 | if (!rfkill) | |
787 | return NULL; | |
788 | ||
789 | spin_lock_init(&rfkill->lock); | |
790 | INIT_LIST_HEAD(&rfkill->node); | |
791 | rfkill->type = type; | |
792 | rfkill->name = name; | |
793 | rfkill->ops = ops; | |
794 | rfkill->data = ops_data; | |
795 | ||
796 | dev = &rfkill->dev; | |
797 | dev->class = &rfkill_class; | |
798 | dev->parent = parent; | |
799 | device_initialize(dev); | |
800 | ||
801 | return rfkill; | |
802 | } | |
803 | EXPORT_SYMBOL(rfkill_alloc); | |
804 | ||
805 | static void rfkill_poll(struct work_struct *work) | |
806 | { | |
807 | struct rfkill *rfkill; | |
808 | ||
809 | rfkill = container_of(work, struct rfkill, poll_work.work); | |
810 | ||
811 | /* | |
812 | * Poll hardware state -- driver will use one of the | |
813 | * rfkill_set{,_hw,_sw}_state functions and use its | |
814 | * return value to update the current status. | |
815 | */ | |
816 | rfkill->ops->poll(rfkill, rfkill->data); | |
817 | ||
818 | schedule_delayed_work(&rfkill->poll_work, | |
819 | round_jiffies_relative(POLL_INTERVAL)); | |
820 | } | |
821 | ||
822 | static void rfkill_uevent_work(struct work_struct *work) | |
823 | { | |
824 | struct rfkill *rfkill; | |
825 | ||
826 | rfkill = container_of(work, struct rfkill, uevent_work); | |
827 | ||
c64fb016 JB |
828 | mutex_lock(&rfkill_global_mutex); |
829 | rfkill_event(rfkill); | |
830 | mutex_unlock(&rfkill_global_mutex); | |
19d337df JB |
831 | } |
832 | ||
833 | static void rfkill_sync_work(struct work_struct *work) | |
834 | { | |
835 | struct rfkill *rfkill; | |
836 | bool cur; | |
837 | ||
838 | rfkill = container_of(work, struct rfkill, sync_work); | |
839 | ||
840 | mutex_lock(&rfkill_global_mutex); | |
841 | cur = rfkill_global_states[rfkill->type].cur; | |
842 | rfkill_set_block(rfkill, cur); | |
843 | mutex_unlock(&rfkill_global_mutex); | |
844 | } | |
845 | ||
846 | int __must_check rfkill_register(struct rfkill *rfkill) | |
847 | { | |
848 | static unsigned long rfkill_no; | |
849 | struct device *dev = &rfkill->dev; | |
850 | int error; | |
851 | ||
852 | BUG_ON(!rfkill); | |
853 | ||
854 | mutex_lock(&rfkill_global_mutex); | |
855 | ||
856 | if (rfkill->registered) { | |
857 | error = -EALREADY; | |
858 | goto unlock; | |
859 | } | |
860 | ||
c64fb016 | 861 | rfkill->idx = rfkill_no; |
19d337df JB |
862 | dev_set_name(dev, "rfkill%lu", rfkill_no); |
863 | rfkill_no++; | |
864 | ||
19d337df JB |
865 | list_add_tail(&rfkill->node, &rfkill_list); |
866 | ||
867 | error = device_add(dev); | |
868 | if (error) | |
869 | goto remove; | |
870 | ||
871 | error = rfkill_led_trigger_register(rfkill); | |
872 | if (error) | |
873 | goto devdel; | |
874 | ||
875 | rfkill->registered = true; | |
876 | ||
2ec2c68c | 877 | INIT_DELAYED_WORK(&rfkill->poll_work, rfkill_poll); |
19d337df | 878 | INIT_WORK(&rfkill->uevent_work, rfkill_uevent_work); |
19d337df | 879 | INIT_WORK(&rfkill->sync_work, rfkill_sync_work); |
2ec2c68c JB |
880 | |
881 | if (rfkill->ops->poll) | |
882 | schedule_delayed_work(&rfkill->poll_work, | |
883 | round_jiffies_relative(POLL_INTERVAL)); | |
b3fa1329 AJ |
884 | |
885 | if (!rfkill->persistent || rfkill_epo_lock_active) { | |
886 | schedule_work(&rfkill->sync_work); | |
887 | } else { | |
888 | #ifdef CONFIG_RFKILL_INPUT | |
889 | bool soft_blocked = !!(rfkill->state & RFKILL_BLOCK_SW); | |
890 | ||
891 | if (!atomic_read(&rfkill_input_disabled)) | |
892 | __rfkill_switch_all(rfkill->type, soft_blocked); | |
893 | #endif | |
894 | } | |
2ec2c68c | 895 | |
c64fb016 | 896 | rfkill_send_events(rfkill, RFKILL_OP_ADD); |
19d337df JB |
897 | |
898 | mutex_unlock(&rfkill_global_mutex); | |
899 | return 0; | |
900 | ||
901 | devdel: | |
902 | device_del(&rfkill->dev); | |
903 | remove: | |
904 | list_del_init(&rfkill->node); | |
905 | unlock: | |
906 | mutex_unlock(&rfkill_global_mutex); | |
907 | return error; | |
908 | } | |
909 | EXPORT_SYMBOL(rfkill_register); | |
910 | ||
911 | void rfkill_unregister(struct rfkill *rfkill) | |
912 | { | |
913 | BUG_ON(!rfkill); | |
914 | ||
915 | if (rfkill->ops->poll) | |
916 | cancel_delayed_work_sync(&rfkill->poll_work); | |
917 | ||
918 | cancel_work_sync(&rfkill->uevent_work); | |
919 | cancel_work_sync(&rfkill->sync_work); | |
920 | ||
921 | rfkill->registered = false; | |
922 | ||
923 | device_del(&rfkill->dev); | |
924 | ||
925 | mutex_lock(&rfkill_global_mutex); | |
c64fb016 | 926 | rfkill_send_events(rfkill, RFKILL_OP_DEL); |
19d337df JB |
927 | list_del_init(&rfkill->node); |
928 | mutex_unlock(&rfkill_global_mutex); | |
929 | ||
930 | rfkill_led_trigger_unregister(rfkill); | |
931 | } | |
932 | EXPORT_SYMBOL(rfkill_unregister); | |
933 | ||
934 | void rfkill_destroy(struct rfkill *rfkill) | |
935 | { | |
936 | if (rfkill) | |
937 | put_device(&rfkill->dev); | |
938 | } | |
939 | EXPORT_SYMBOL(rfkill_destroy); | |
940 | ||
c64fb016 JB |
941 | static int rfkill_fop_open(struct inode *inode, struct file *file) |
942 | { | |
943 | struct rfkill_data *data; | |
944 | struct rfkill *rfkill; | |
945 | struct rfkill_int_event *ev, *tmp; | |
946 | ||
947 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
948 | if (!data) | |
949 | return -ENOMEM; | |
950 | ||
951 | INIT_LIST_HEAD(&data->events); | |
952 | mutex_init(&data->mtx); | |
953 | init_waitqueue_head(&data->read_wait); | |
954 | ||
955 | mutex_lock(&rfkill_global_mutex); | |
956 | mutex_lock(&data->mtx); | |
957 | /* | |
958 | * start getting events from elsewhere but hold mtx to get | |
959 | * startup events added first | |
960 | */ | |
961 | list_add(&data->list, &rfkill_fds); | |
962 | ||
963 | list_for_each_entry(rfkill, &rfkill_list, node) { | |
964 | ev = kzalloc(sizeof(*ev), GFP_KERNEL); | |
965 | if (!ev) | |
966 | goto free; | |
967 | rfkill_fill_event(&ev->ev, rfkill, RFKILL_OP_ADD); | |
968 | list_add_tail(&ev->list, &data->events); | |
969 | } | |
970 | mutex_unlock(&data->mtx); | |
971 | mutex_unlock(&rfkill_global_mutex); | |
972 | ||
973 | file->private_data = data; | |
974 | ||
975 | return nonseekable_open(inode, file); | |
976 | ||
977 | free: | |
978 | mutex_unlock(&data->mtx); | |
979 | mutex_unlock(&rfkill_global_mutex); | |
980 | mutex_destroy(&data->mtx); | |
981 | list_for_each_entry_safe(ev, tmp, &data->events, list) | |
982 | kfree(ev); | |
983 | kfree(data); | |
984 | return -ENOMEM; | |
985 | } | |
986 | ||
987 | static unsigned int rfkill_fop_poll(struct file *file, poll_table *wait) | |
988 | { | |
989 | struct rfkill_data *data = file->private_data; | |
990 | unsigned int res = POLLOUT | POLLWRNORM; | |
991 | ||
992 | poll_wait(file, &data->read_wait, wait); | |
993 | ||
994 | mutex_lock(&data->mtx); | |
995 | if (!list_empty(&data->events)) | |
996 | res = POLLIN | POLLRDNORM; | |
997 | mutex_unlock(&data->mtx); | |
998 | ||
999 | return res; | |
1000 | } | |
1001 | ||
1002 | static bool rfkill_readable(struct rfkill_data *data) | |
1003 | { | |
1004 | bool r; | |
1005 | ||
1006 | mutex_lock(&data->mtx); | |
1007 | r = !list_empty(&data->events); | |
1008 | mutex_unlock(&data->mtx); | |
1009 | ||
1010 | return r; | |
1011 | } | |
1012 | ||
1013 | static ssize_t rfkill_fop_read(struct file *file, char __user *buf, | |
1014 | size_t count, loff_t *pos) | |
1015 | { | |
1016 | struct rfkill_data *data = file->private_data; | |
1017 | struct rfkill_int_event *ev; | |
1018 | unsigned long sz; | |
1019 | int ret; | |
1020 | ||
1021 | mutex_lock(&data->mtx); | |
1022 | ||
1023 | while (list_empty(&data->events)) { | |
1024 | if (file->f_flags & O_NONBLOCK) { | |
1025 | ret = -EAGAIN; | |
1026 | goto out; | |
1027 | } | |
1028 | mutex_unlock(&data->mtx); | |
1029 | ret = wait_event_interruptible(data->read_wait, | |
1030 | rfkill_readable(data)); | |
1031 | mutex_lock(&data->mtx); | |
1032 | ||
1033 | if (ret) | |
1034 | goto out; | |
1035 | } | |
1036 | ||
1037 | ev = list_first_entry(&data->events, struct rfkill_int_event, | |
1038 | list); | |
1039 | ||
1040 | sz = min_t(unsigned long, sizeof(ev->ev), count); | |
1041 | ret = sz; | |
1042 | if (copy_to_user(buf, &ev->ev, sz)) | |
1043 | ret = -EFAULT; | |
1044 | ||
1045 | list_del(&ev->list); | |
1046 | kfree(ev); | |
1047 | out: | |
1048 | mutex_unlock(&data->mtx); | |
1049 | return ret; | |
1050 | } | |
1051 | ||
1052 | static ssize_t rfkill_fop_write(struct file *file, const char __user *buf, | |
1053 | size_t count, loff_t *pos) | |
1054 | { | |
1055 | struct rfkill *rfkill; | |
1056 | struct rfkill_event ev; | |
1057 | ||
1058 | /* we don't need the 'hard' variable but accept it */ | |
1059 | if (count < sizeof(ev) - 1) | |
1060 | return -EINVAL; | |
1061 | ||
1062 | if (copy_from_user(&ev, buf, sizeof(ev) - 1)) | |
1063 | return -EFAULT; | |
1064 | ||
1065 | if (ev.op != RFKILL_OP_CHANGE && ev.op != RFKILL_OP_CHANGE_ALL) | |
1066 | return -EINVAL; | |
1067 | ||
1068 | if (ev.type >= NUM_RFKILL_TYPES) | |
1069 | return -EINVAL; | |
1070 | ||
1071 | mutex_lock(&rfkill_global_mutex); | |
1072 | ||
1073 | if (ev.op == RFKILL_OP_CHANGE_ALL) { | |
1074 | if (ev.type == RFKILL_TYPE_ALL) { | |
1075 | enum rfkill_type i; | |
1076 | for (i = 0; i < NUM_RFKILL_TYPES; i++) | |
1077 | rfkill_global_states[i].cur = ev.soft; | |
1078 | } else { | |
1079 | rfkill_global_states[ev.type].cur = ev.soft; | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | list_for_each_entry(rfkill, &rfkill_list, node) { | |
1084 | if (rfkill->idx != ev.idx && ev.op != RFKILL_OP_CHANGE_ALL) | |
1085 | continue; | |
1086 | ||
1087 | if (rfkill->type != ev.type && ev.type != RFKILL_TYPE_ALL) | |
1088 | continue; | |
1089 | ||
1090 | rfkill_set_block(rfkill, ev.soft); | |
1091 | } | |
1092 | mutex_unlock(&rfkill_global_mutex); | |
1093 | ||
1094 | return count; | |
1095 | } | |
1096 | ||
1097 | static int rfkill_fop_release(struct inode *inode, struct file *file) | |
1098 | { | |
1099 | struct rfkill_data *data = file->private_data; | |
1100 | struct rfkill_int_event *ev, *tmp; | |
1101 | ||
1102 | mutex_lock(&rfkill_global_mutex); | |
1103 | list_del(&data->list); | |
1104 | mutex_unlock(&rfkill_global_mutex); | |
1105 | ||
1106 | mutex_destroy(&data->mtx); | |
1107 | list_for_each_entry_safe(ev, tmp, &data->events, list) | |
1108 | kfree(ev); | |
1109 | ||
1110 | #ifdef CONFIG_RFKILL_INPUT | |
1111 | if (data->input_handler) | |
207ee162 JB |
1112 | if (atomic_dec_return(&rfkill_input_disabled) == 0) |
1113 | printk(KERN_DEBUG "rfkill: input handler enabled\n"); | |
c64fb016 JB |
1114 | #endif |
1115 | ||
1116 | kfree(data); | |
1117 | ||
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | #ifdef CONFIG_RFKILL_INPUT | |
1122 | static long rfkill_fop_ioctl(struct file *file, unsigned int cmd, | |
1123 | unsigned long arg) | |
1124 | { | |
1125 | struct rfkill_data *data = file->private_data; | |
1126 | ||
1127 | if (_IOC_TYPE(cmd) != RFKILL_IOC_MAGIC) | |
1128 | return -ENOSYS; | |
1129 | ||
1130 | if (_IOC_NR(cmd) != RFKILL_IOC_NOINPUT) | |
1131 | return -ENOSYS; | |
1132 | ||
1133 | mutex_lock(&data->mtx); | |
1134 | ||
1135 | if (!data->input_handler) { | |
207ee162 JB |
1136 | if (atomic_inc_return(&rfkill_input_disabled) == 1) |
1137 | printk(KERN_DEBUG "rfkill: input handler disabled\n"); | |
c64fb016 JB |
1138 | data->input_handler = true; |
1139 | } | |
1140 | ||
1141 | mutex_unlock(&data->mtx); | |
1142 | ||
1143 | return 0; | |
1144 | } | |
1145 | #endif | |
1146 | ||
1147 | static const struct file_operations rfkill_fops = { | |
1148 | .open = rfkill_fop_open, | |
1149 | .read = rfkill_fop_read, | |
1150 | .write = rfkill_fop_write, | |
1151 | .poll = rfkill_fop_poll, | |
1152 | .release = rfkill_fop_release, | |
1153 | #ifdef CONFIG_RFKILL_INPUT | |
1154 | .unlocked_ioctl = rfkill_fop_ioctl, | |
1155 | .compat_ioctl = rfkill_fop_ioctl, | |
1156 | #endif | |
1157 | }; | |
1158 | ||
1159 | static struct miscdevice rfkill_miscdev = { | |
1160 | .name = "rfkill", | |
1161 | .fops = &rfkill_fops, | |
1162 | .minor = MISC_DYNAMIC_MINOR, | |
1163 | }; | |
19d337df JB |
1164 | |
1165 | static int __init rfkill_init(void) | |
1166 | { | |
1167 | int error; | |
1168 | int i; | |
1169 | ||
1170 | for (i = 0; i < NUM_RFKILL_TYPES; i++) | |
b3fa1329 | 1171 | rfkill_global_states[i].cur = !rfkill_default_state; |
19d337df JB |
1172 | |
1173 | error = class_register(&rfkill_class); | |
1174 | if (error) | |
1175 | goto out; | |
1176 | ||
c64fb016 JB |
1177 | error = misc_register(&rfkill_miscdev); |
1178 | if (error) { | |
1179 | class_unregister(&rfkill_class); | |
1180 | goto out; | |
1181 | } | |
1182 | ||
19d337df JB |
1183 | #ifdef CONFIG_RFKILL_INPUT |
1184 | error = rfkill_handler_init(); | |
c64fb016 JB |
1185 | if (error) { |
1186 | misc_deregister(&rfkill_miscdev); | |
19d337df | 1187 | class_unregister(&rfkill_class); |
c64fb016 JB |
1188 | goto out; |
1189 | } | |
19d337df JB |
1190 | #endif |
1191 | ||
1192 | out: | |
1193 | return error; | |
1194 | } | |
1195 | subsys_initcall(rfkill_init); | |
1196 | ||
1197 | static void __exit rfkill_exit(void) | |
1198 | { | |
1199 | #ifdef CONFIG_RFKILL_INPUT | |
1200 | rfkill_handler_exit(); | |
1201 | #endif | |
c64fb016 | 1202 | misc_deregister(&rfkill_miscdev); |
19d337df JB |
1203 | class_unregister(&rfkill_class); |
1204 | } | |
1205 | module_exit(rfkill_exit); |