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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, see <http://www.gnu.org/licenses/>. |
18 | */ |
19 | |
20 | #include <linux/kernel.h> |
21 | #include <linux/module.h> |
22 | #include <linux/init.h> |
23 | #include <linux/workqueue.h> |
24 | #include <linux/capability.h> |
25 | #include <linux/list.h> |
26 | #include <linux/mutex.h> |
27 | #include <linux/rfkill.h> |
28 | #include <linux/sched.h> |
29 | #include <linux/spinlock.h> |
30 | #include <linux/device.h> |
31 | #include <linux/miscdevice.h> |
32 | #include <linux/wait.h> |
33 | #include <linux/poll.h> |
34 | #include <linux/fs.h> |
35 | #include <linux/slab.h> |
36 | |
37 | #include "rfkill.h" |
38 | |
39 | #define POLL_INTERVAL (5 * HZ) |
40 | |
41 | #define RFKILL_BLOCK_HW BIT(0) |
42 | #define RFKILL_BLOCK_SW BIT(1) |
43 | #define RFKILL_BLOCK_SW_PREV BIT(2) |
44 | #define RFKILL_BLOCK_ANY (RFKILL_BLOCK_HW |\ |
45 | RFKILL_BLOCK_SW |\ |
46 | RFKILL_BLOCK_SW_PREV) |
47 | #define RFKILL_BLOCK_SW_SETCALL BIT(31) |
48 | |
49 | struct rfkill { |
50 | spinlock_t lock; |
51 | |
52 | const char *name; |
53 | enum rfkill_type type; |
54 | |
55 | unsigned long state; |
56 | |
57 | u32 idx; |
58 | |
59 | bool registered; |
60 | bool persistent; |
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 | |
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 | }; |
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); |
112 | static LIST_HEAD(rfkill_fds); /* list of open fds of /dev/rfkill */ |
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 { |
120 | bool cur, sav; |
121 | } rfkill_global_states[NUM_RFKILL_TYPES]; |
122 | |
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 | |
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) |
226 | { |
227 | if (!rfkill->registered) |
228 | return; |
229 | |
230 | kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE); |
231 | |
232 | /* also send event to /dev/rfkill */ |
233 | rfkill_send_events(rfkill, RFKILL_OP_CHANGE); |
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 | bool prev, curr; |
272 | int err; |
273 | |
274 | if (unlikely(rfkill->dev.power.power_state.event & PM_EVENT_SLEEP)) |
275 | return; |
276 | |
277 | /* |
278 | * Some platforms (...!) generate input events which affect the |
279 | * _hard_ kill state -- whenever something tries to change the |
280 | * current software state query the hardware state too. |
281 | */ |
282 | if (rfkill->ops->query) |
283 | rfkill->ops->query(rfkill, rfkill->data); |
284 | |
285 | spin_lock_irqsave(&rfkill->lock, flags); |
286 | prev = rfkill->state & RFKILL_BLOCK_SW; |
287 | |
288 | if (rfkill->state & RFKILL_BLOCK_SW) |
289 | rfkill->state |= RFKILL_BLOCK_SW_PREV; |
290 | else |
291 | rfkill->state &= ~RFKILL_BLOCK_SW_PREV; |
292 | |
293 | if (blocked) |
294 | rfkill->state |= RFKILL_BLOCK_SW; |
295 | else |
296 | rfkill->state &= ~RFKILL_BLOCK_SW; |
297 | |
298 | rfkill->state |= RFKILL_BLOCK_SW_SETCALL; |
299 | spin_unlock_irqrestore(&rfkill->lock, flags); |
300 | |
301 | err = rfkill->ops->set_block(rfkill->data, blocked); |
302 | |
303 | spin_lock_irqsave(&rfkill->lock, flags); |
304 | if (err) { |
305 | /* |
306 | * Failed -- reset status to _prev, this may be different |
307 | * from what set set _PREV to earlier in this function |
308 | * if rfkill_set_sw_state was invoked. |
309 | */ |
310 | if (rfkill->state & RFKILL_BLOCK_SW_PREV) |
311 | rfkill->state |= RFKILL_BLOCK_SW; |
312 | else |
313 | rfkill->state &= ~RFKILL_BLOCK_SW; |
314 | } |
315 | rfkill->state &= ~RFKILL_BLOCK_SW_SETCALL; |
316 | rfkill->state &= ~RFKILL_BLOCK_SW_PREV; |
317 | curr = rfkill->state & RFKILL_BLOCK_SW; |
318 | spin_unlock_irqrestore(&rfkill->lock, flags); |
319 | |
320 | rfkill_led_trigger_event(rfkill); |
321 | |
322 | if (prev != curr) |
323 | rfkill_event(rfkill); |
324 | } |
325 | |
326 | #ifdef CONFIG_RFKILL_INPUT |
327 | static atomic_t rfkill_input_disabled = ATOMIC_INIT(0); |
328 | |
329 | /** |
330 | * __rfkill_switch_all - Toggle state of all switches of given type |
331 | * @type: type of interfaces to be affected |
332 | * @state: the new state |
333 | * |
334 | * This function sets the state of all switches of given type, |
335 | * unless a specific switch is claimed by userspace (in which case, |
336 | * that switch is left alone) or suspended. |
337 | * |
338 | * Caller must have acquired rfkill_global_mutex. |
339 | */ |
340 | static void __rfkill_switch_all(const enum rfkill_type type, bool blocked) |
341 | { |
342 | struct rfkill *rfkill; |
343 | |
344 | rfkill_global_states[type].cur = blocked; |
345 | list_for_each_entry(rfkill, &rfkill_list, node) { |
346 | if (rfkill->type != type && type != RFKILL_TYPE_ALL) |
347 | continue; |
348 | |
349 | rfkill_set_block(rfkill, blocked); |
350 | } |
351 | } |
352 | |
353 | /** |
354 | * rfkill_switch_all - Toggle state of all switches of given type |
355 | * @type: type of interfaces to be affected |
356 | * @state: the new state |
357 | * |
358 | * Acquires rfkill_global_mutex and calls __rfkill_switch_all(@type, @state). |
359 | * Please refer to __rfkill_switch_all() for details. |
360 | * |
361 | * Does nothing if the EPO lock is active. |
362 | */ |
363 | void rfkill_switch_all(enum rfkill_type type, bool blocked) |
364 | { |
365 | if (atomic_read(&rfkill_input_disabled)) |
366 | return; |
367 | |
368 | mutex_lock(&rfkill_global_mutex); |
369 | |
370 | if (!rfkill_epo_lock_active) |
371 | __rfkill_switch_all(type, blocked); |
372 | |
373 | mutex_unlock(&rfkill_global_mutex); |
374 | } |
375 | |
376 | /** |
377 | * rfkill_epo - emergency power off all transmitters |
378 | * |
379 | * This kicks all non-suspended rfkill devices to RFKILL_STATE_SOFT_BLOCKED, |
380 | * ignoring everything in its path but rfkill_global_mutex and rfkill->mutex. |
381 | * |
382 | * The global state before the EPO is saved and can be restored later |
383 | * using rfkill_restore_states(). |
384 | */ |
385 | void rfkill_epo(void) |
386 | { |
387 | struct rfkill *rfkill; |
388 | int i; |
389 | |
390 | if (atomic_read(&rfkill_input_disabled)) |
391 | return; |
392 | |
393 | mutex_lock(&rfkill_global_mutex); |
394 | |
395 | rfkill_epo_lock_active = true; |
396 | list_for_each_entry(rfkill, &rfkill_list, node) |
397 | rfkill_set_block(rfkill, true); |
398 | |
399 | for (i = 0; i < NUM_RFKILL_TYPES; i++) { |
400 | rfkill_global_states[i].sav = rfkill_global_states[i].cur; |
401 | rfkill_global_states[i].cur = true; |
402 | } |
403 | |
404 | mutex_unlock(&rfkill_global_mutex); |
405 | } |
406 | |
407 | /** |
408 | * rfkill_restore_states - restore global states |
409 | * |
410 | * Restore (and sync switches to) the global state from the |
411 | * states in rfkill_default_states. This can undo the effects of |
412 | * a call to rfkill_epo(). |
413 | */ |
414 | void rfkill_restore_states(void) |
415 | { |
416 | int i; |
417 | |
418 | if (atomic_read(&rfkill_input_disabled)) |
419 | return; |
420 | |
421 | mutex_lock(&rfkill_global_mutex); |
422 | |
423 | rfkill_epo_lock_active = false; |
424 | for (i = 0; i < NUM_RFKILL_TYPES; i++) |
425 | __rfkill_switch_all(i, rfkill_global_states[i].sav); |
426 | mutex_unlock(&rfkill_global_mutex); |
427 | } |
428 | |
429 | /** |
430 | * rfkill_remove_epo_lock - unlock state changes |
431 | * |
432 | * Used by rfkill-input manually unlock state changes, when |
433 | * the EPO switch is deactivated. |
434 | */ |
435 | void rfkill_remove_epo_lock(void) |
436 | { |
437 | if (atomic_read(&rfkill_input_disabled)) |
438 | return; |
439 | |
440 | mutex_lock(&rfkill_global_mutex); |
441 | rfkill_epo_lock_active = false; |
442 | mutex_unlock(&rfkill_global_mutex); |
443 | } |
444 | |
445 | /** |
446 | * rfkill_is_epo_lock_active - returns true EPO is active |
447 | * |
448 | * Returns 0 (false) if there is NOT an active EPO contidion, |
449 | * and 1 (true) if there is an active EPO contition, which |
450 | * locks all radios in one of the BLOCKED states. |
451 | * |
452 | * Can be called in atomic context. |
453 | */ |
454 | bool rfkill_is_epo_lock_active(void) |
455 | { |
456 | return rfkill_epo_lock_active; |
457 | } |
458 | |
459 | /** |
460 | * rfkill_get_global_sw_state - returns global state for a type |
461 | * @type: the type to get the global state of |
462 | * |
463 | * Returns the current global state for a given wireless |
464 | * device type. |
465 | */ |
466 | bool rfkill_get_global_sw_state(const enum rfkill_type type) |
467 | { |
468 | return rfkill_global_states[type].cur; |
469 | } |
470 | #endif |
471 | |
472 | |
473 | bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked) |
474 | { |
475 | bool ret, change; |
476 | |
477 | ret = __rfkill_set_hw_state(rfkill, blocked, &change); |
478 | |
479 | if (!rfkill->registered) |
480 | return ret; |
481 | |
482 | if (change) |
483 | schedule_work(&rfkill->uevent_work); |
484 | |
485 | return ret; |
486 | } |
487 | EXPORT_SYMBOL(rfkill_set_hw_state); |
488 | |
489 | static void __rfkill_set_sw_state(struct rfkill *rfkill, bool blocked) |
490 | { |
491 | u32 bit = RFKILL_BLOCK_SW; |
492 | |
493 | /* if in a ops->set_block right now, use other bit */ |
494 | if (rfkill->state & RFKILL_BLOCK_SW_SETCALL) |
495 | bit = RFKILL_BLOCK_SW_PREV; |
496 | |
497 | if (blocked) |
498 | rfkill->state |= bit; |
499 | else |
500 | rfkill->state &= ~bit; |
501 | } |
502 | |
503 | bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked) |
504 | { |
505 | unsigned long flags; |
506 | bool prev, hwblock; |
507 | |
508 | BUG_ON(!rfkill); |
509 | |
510 | spin_lock_irqsave(&rfkill->lock, flags); |
511 | prev = !!(rfkill->state & RFKILL_BLOCK_SW); |
512 | __rfkill_set_sw_state(rfkill, blocked); |
513 | hwblock = !!(rfkill->state & RFKILL_BLOCK_HW); |
514 | blocked = blocked || hwblock; |
515 | spin_unlock_irqrestore(&rfkill->lock, flags); |
516 | |
517 | if (!rfkill->registered) |
518 | return blocked; |
519 | |
520 | if (prev != blocked && !hwblock) |
521 | schedule_work(&rfkill->uevent_work); |
522 | |
523 | rfkill_led_trigger_event(rfkill); |
524 | |
525 | return blocked; |
526 | } |
527 | EXPORT_SYMBOL(rfkill_set_sw_state); |
528 | |
529 | void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked) |
530 | { |
531 | unsigned long flags; |
532 | |
533 | BUG_ON(!rfkill); |
534 | BUG_ON(rfkill->registered); |
535 | |
536 | spin_lock_irqsave(&rfkill->lock, flags); |
537 | __rfkill_set_sw_state(rfkill, blocked); |
538 | rfkill->persistent = true; |
539 | spin_unlock_irqrestore(&rfkill->lock, flags); |
540 | } |
541 | EXPORT_SYMBOL(rfkill_init_sw_state); |
542 | |
543 | void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw) |
544 | { |
545 | unsigned long flags; |
546 | bool swprev, hwprev; |
547 | |
548 | BUG_ON(!rfkill); |
549 | |
550 | spin_lock_irqsave(&rfkill->lock, flags); |
551 | |
552 | /* |
553 | * No need to care about prev/setblock ... this is for uevent only |
554 | * and that will get triggered by rfkill_set_block anyway. |
555 | */ |
556 | swprev = !!(rfkill->state & RFKILL_BLOCK_SW); |
557 | hwprev = !!(rfkill->state & RFKILL_BLOCK_HW); |
558 | __rfkill_set_sw_state(rfkill, sw); |
559 | if (hw) |
560 | rfkill->state |= RFKILL_BLOCK_HW; |
561 | else |
562 | rfkill->state &= ~RFKILL_BLOCK_HW; |
563 | |
564 | spin_unlock_irqrestore(&rfkill->lock, flags); |
565 | |
566 | if (!rfkill->registered) { |
567 | rfkill->persistent = true; |
568 | } else { |
569 | if (swprev != sw || hwprev != hw) |
570 | schedule_work(&rfkill->uevent_work); |
571 | |
572 | rfkill_led_trigger_event(rfkill); |
573 | } |
574 | } |
575 | EXPORT_SYMBOL(rfkill_set_states); |
576 | |
577 | static ssize_t name_show(struct device *dev, struct device_attribute *attr, |
578 | char *buf) |
579 | { |
580 | struct rfkill *rfkill = to_rfkill(dev); |
581 | |
582 | return sprintf(buf, "%s\n", rfkill->name); |
583 | } |
584 | static DEVICE_ATTR_RO(name); |
585 | |
586 | static const char *rfkill_get_type_str(enum rfkill_type type) |
587 | { |
588 | BUILD_BUG_ON(NUM_RFKILL_TYPES != RFKILL_TYPE_NFC + 1); |
589 | |
590 | switch (type) { |
591 | case RFKILL_TYPE_WLAN: |
592 | return "wlan"; |
593 | case RFKILL_TYPE_BLUETOOTH: |
594 | return "bluetooth"; |
595 | case RFKILL_TYPE_UWB: |
596 | return "ultrawideband"; |
597 | case RFKILL_TYPE_WIMAX: |
598 | return "wimax"; |
599 | case RFKILL_TYPE_WWAN: |
600 | return "wwan"; |
601 | case RFKILL_TYPE_GPS: |
602 | return "gps"; |
603 | case RFKILL_TYPE_FM: |
604 | return "fm"; |
605 | case RFKILL_TYPE_NFC: |
606 | return "nfc"; |
607 | default: |
608 | BUG(); |
609 | } |
610 | } |
611 | |
612 | static ssize_t type_show(struct device *dev, struct device_attribute *attr, |
613 | char *buf) |
614 | { |
615 | struct rfkill *rfkill = to_rfkill(dev); |
616 | |
617 | return sprintf(buf, "%s\n", rfkill_get_type_str(rfkill->type)); |
618 | } |
619 | static DEVICE_ATTR_RO(type); |
620 | |
621 | static ssize_t index_show(struct device *dev, struct device_attribute *attr, |
622 | char *buf) |
623 | { |
624 | struct rfkill *rfkill = to_rfkill(dev); |
625 | |
626 | return sprintf(buf, "%d\n", rfkill->idx); |
627 | } |
628 | static DEVICE_ATTR_RO(index); |
629 | |
630 | static ssize_t persistent_show(struct device *dev, |
631 | struct device_attribute *attr, char *buf) |
632 | { |
633 | struct rfkill *rfkill = to_rfkill(dev); |
634 | |
635 | return sprintf(buf, "%d\n", rfkill->persistent); |
636 | } |
637 | static DEVICE_ATTR_RO(persistent); |
638 | |
639 | static ssize_t hard_show(struct device *dev, struct device_attribute *attr, |
640 | char *buf) |
641 | { |
642 | struct rfkill *rfkill = to_rfkill(dev); |
643 | |
644 | return sprintf(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_HW) ? 1 : 0 ); |
645 | } |
646 | static DEVICE_ATTR_RO(hard); |
647 | |
648 | static ssize_t soft_show(struct device *dev, struct device_attribute *attr, |
649 | char *buf) |
650 | { |
651 | struct rfkill *rfkill = to_rfkill(dev); |
652 | |
653 | return sprintf(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_SW) ? 1 : 0 ); |
654 | } |
655 | |
656 | static ssize_t soft_store(struct device *dev, struct device_attribute *attr, |
657 | const char *buf, size_t count) |
658 | { |
659 | struct rfkill *rfkill = to_rfkill(dev); |
660 | unsigned long state; |
661 | int err; |
662 | |
663 | if (!capable(CAP_NET_ADMIN)) |
664 | return -EPERM; |
665 | |
666 | err = kstrtoul(buf, 0, &state); |
667 | if (err) |
668 | return err; |
669 | |
670 | if (state > 1 ) |
671 | return -EINVAL; |
672 | |
673 | mutex_lock(&rfkill_global_mutex); |
674 | rfkill_set_block(rfkill, state); |
675 | mutex_unlock(&rfkill_global_mutex); |
676 | |
677 | return count; |
678 | } |
679 | static DEVICE_ATTR_RW(soft); |
680 | |
681 | static u8 user_state_from_blocked(unsigned long state) |
682 | { |
683 | if (state & RFKILL_BLOCK_HW) |
684 | return RFKILL_USER_STATE_HARD_BLOCKED; |
685 | if (state & RFKILL_BLOCK_SW) |
686 | return RFKILL_USER_STATE_SOFT_BLOCKED; |
687 | |
688 | return RFKILL_USER_STATE_UNBLOCKED; |
689 | } |
690 | |
691 | static ssize_t state_show(struct device *dev, struct device_attribute *attr, |
692 | char *buf) |
693 | { |
694 | struct rfkill *rfkill = to_rfkill(dev); |
695 | |
696 | return sprintf(buf, "%d\n", user_state_from_blocked(rfkill->state)); |
697 | } |
698 | |
699 | static ssize_t state_store(struct device *dev, struct device_attribute *attr, |
700 | const char *buf, size_t count) |
701 | { |
702 | struct rfkill *rfkill = to_rfkill(dev); |
703 | unsigned long state; |
704 | int err; |
705 | |
706 | if (!capable(CAP_NET_ADMIN)) |
707 | return -EPERM; |
708 | |
709 | err = kstrtoul(buf, 0, &state); |
710 | if (err) |
711 | return err; |
712 | |
713 | if (state != RFKILL_USER_STATE_SOFT_BLOCKED && |
714 | state != RFKILL_USER_STATE_UNBLOCKED) |
715 | return -EINVAL; |
716 | |
717 | mutex_lock(&rfkill_global_mutex); |
718 | rfkill_set_block(rfkill, state == RFKILL_USER_STATE_SOFT_BLOCKED); |
719 | mutex_unlock(&rfkill_global_mutex); |
720 | |
721 | return count; |
722 | } |
723 | static DEVICE_ATTR_RW(state); |
724 | |
725 | static ssize_t claim_show(struct device *dev, struct device_attribute *attr, |
726 | char *buf) |
727 | { |
728 | return sprintf(buf, "%d\n", 0); |
729 | } |
730 | static DEVICE_ATTR_RO(claim); |
731 | |
732 | static struct attribute *rfkill_dev_attrs[] = { |
733 | &dev_attr_name.attr, |
734 | &dev_attr_type.attr, |
735 | &dev_attr_index.attr, |
736 | &dev_attr_persistent.attr, |
737 | &dev_attr_state.attr, |
738 | &dev_attr_claim.attr, |
739 | &dev_attr_soft.attr, |
740 | &dev_attr_hard.attr, |
741 | NULL, |
742 | }; |
743 | ATTRIBUTE_GROUPS(rfkill_dev); |
744 | |
745 | static void rfkill_release(struct device *dev) |
746 | { |
747 | struct rfkill *rfkill = to_rfkill(dev); |
748 | |
749 | kfree(rfkill); |
750 | } |
751 | |
752 | static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env) |
753 | { |
754 | struct rfkill *rfkill = to_rfkill(dev); |
755 | unsigned long flags; |
756 | u32 state; |
757 | int error; |
758 | |
759 | error = add_uevent_var(env, "RFKILL_NAME=%s", rfkill->name); |
760 | if (error) |
761 | return error; |
762 | error = add_uevent_var(env, "RFKILL_TYPE=%s", |
763 | rfkill_get_type_str(rfkill->type)); |
764 | if (error) |
765 | return error; |
766 | spin_lock_irqsave(&rfkill->lock, flags); |
767 | state = rfkill->state; |
768 | spin_unlock_irqrestore(&rfkill->lock, flags); |
769 | error = add_uevent_var(env, "RFKILL_STATE=%d", |
770 | user_state_from_blocked(state)); |
771 | return error; |
772 | } |
773 | |
774 | void rfkill_pause_polling(struct rfkill *rfkill) |
775 | { |
776 | BUG_ON(!rfkill); |
777 | |
778 | if (!rfkill->ops->poll) |
779 | return; |
780 | |
781 | cancel_delayed_work_sync(&rfkill->poll_work); |
782 | } |
783 | EXPORT_SYMBOL(rfkill_pause_polling); |
784 | |
785 | void rfkill_resume_polling(struct rfkill *rfkill) |
786 | { |
787 | BUG_ON(!rfkill); |
788 | |
789 | if (!rfkill->ops->poll) |
790 | return; |
791 | |
792 | queue_delayed_work(system_power_efficient_wq, |
793 | &rfkill->poll_work, 0); |
794 | } |
795 | EXPORT_SYMBOL(rfkill_resume_polling); |
796 | |
797 | static int rfkill_suspend(struct device *dev, pm_message_t state) |
798 | { |
799 | struct rfkill *rfkill = to_rfkill(dev); |
800 | |
801 | rfkill_pause_polling(rfkill); |
802 | |
803 | return 0; |
804 | } |
805 | |
806 | static int rfkill_resume(struct device *dev) |
807 | { |
808 | struct rfkill *rfkill = to_rfkill(dev); |
809 | bool cur; |
810 | |
811 | if (!rfkill->persistent) { |
812 | cur = !!(rfkill->state & RFKILL_BLOCK_SW); |
813 | rfkill_set_block(rfkill, cur); |
814 | } |
815 | |
816 | rfkill_resume_polling(rfkill); |
817 | |
818 | return 0; |
819 | } |
820 | |
821 | static struct class rfkill_class = { |
822 | .name = "rfkill", |
823 | .dev_release = rfkill_release, |
824 | .dev_groups = rfkill_dev_groups, |
825 | .dev_uevent = rfkill_dev_uevent, |
826 | .suspend = rfkill_suspend, |
827 | .resume = rfkill_resume, |
828 | }; |
829 | |
830 | bool rfkill_blocked(struct rfkill *rfkill) |
831 | { |
832 | unsigned long flags; |
833 | u32 state; |
834 | |
835 | spin_lock_irqsave(&rfkill->lock, flags); |
836 | state = rfkill->state; |
837 | spin_unlock_irqrestore(&rfkill->lock, flags); |
838 | |
839 | return !!(state & RFKILL_BLOCK_ANY); |
840 | } |
841 | EXPORT_SYMBOL(rfkill_blocked); |
842 | |
843 | |
844 | struct rfkill * __must_check rfkill_alloc(const char *name, |
845 | struct device *parent, |
846 | const enum rfkill_type type, |
847 | const struct rfkill_ops *ops, |
848 | void *ops_data) |
849 | { |
850 | struct rfkill *rfkill; |
851 | struct device *dev; |
852 | |
853 | if (WARN_ON(!ops)) |
854 | return NULL; |
855 | |
856 | if (WARN_ON(!ops->set_block)) |
857 | return NULL; |
858 | |
859 | if (WARN_ON(!name)) |
860 | return NULL; |
861 | |
862 | if (WARN_ON(type == RFKILL_TYPE_ALL || type >= NUM_RFKILL_TYPES)) |
863 | return NULL; |
864 | |
865 | rfkill = kzalloc(sizeof(*rfkill), GFP_KERNEL); |
866 | if (!rfkill) |
867 | return NULL; |
868 | |
869 | spin_lock_init(&rfkill->lock); |
870 | INIT_LIST_HEAD(&rfkill->node); |
871 | rfkill->type = type; |
872 | rfkill->name = name; |
873 | rfkill->ops = ops; |
874 | rfkill->data = ops_data; |
875 | |
876 | dev = &rfkill->dev; |
877 | dev->class = &rfkill_class; |
878 | dev->parent = parent; |
879 | device_initialize(dev); |
880 | |
881 | return rfkill; |
882 | } |
883 | EXPORT_SYMBOL(rfkill_alloc); |
884 | |
885 | static void rfkill_poll(struct work_struct *work) |
886 | { |
887 | struct rfkill *rfkill; |
888 | |
889 | rfkill = container_of(work, struct rfkill, poll_work.work); |
890 | |
891 | /* |
892 | * Poll hardware state -- driver will use one of the |
893 | * rfkill_set{,_hw,_sw}_state functions and use its |
894 | * return value to update the current status. |
895 | */ |
896 | rfkill->ops->poll(rfkill, rfkill->data); |
897 | |
898 | queue_delayed_work(system_power_efficient_wq, |
899 | &rfkill->poll_work, |
900 | round_jiffies_relative(POLL_INTERVAL)); |
901 | } |
902 | |
903 | static void rfkill_uevent_work(struct work_struct *work) |
904 | { |
905 | struct rfkill *rfkill; |
906 | |
907 | rfkill = container_of(work, struct rfkill, uevent_work); |
908 | |
909 | mutex_lock(&rfkill_global_mutex); |
910 | rfkill_event(rfkill); |
911 | mutex_unlock(&rfkill_global_mutex); |
912 | } |
913 | |
914 | static void rfkill_sync_work(struct work_struct *work) |
915 | { |
916 | struct rfkill *rfkill; |
917 | bool cur; |
918 | |
919 | rfkill = container_of(work, struct rfkill, sync_work); |
920 | |
921 | mutex_lock(&rfkill_global_mutex); |
922 | cur = rfkill_global_states[rfkill->type].cur; |
923 | rfkill_set_block(rfkill, cur); |
924 | mutex_unlock(&rfkill_global_mutex); |
925 | } |
926 | |
927 | int __must_check rfkill_register(struct rfkill *rfkill) |
928 | { |
929 | static unsigned long rfkill_no; |
930 | struct device *dev = &rfkill->dev; |
931 | int error; |
932 | |
933 | BUG_ON(!rfkill); |
934 | |
935 | mutex_lock(&rfkill_global_mutex); |
936 | |
937 | if (rfkill->registered) { |
938 | error = -EALREADY; |
939 | goto unlock; |
940 | } |
941 | |
942 | rfkill->idx = rfkill_no; |
943 | dev_set_name(dev, "rfkill%lu", rfkill_no); |
944 | rfkill_no++; |
945 | |
946 | list_add_tail(&rfkill->node, &rfkill_list); |
947 | |
948 | error = device_add(dev); |
949 | if (error) |
950 | goto remove; |
951 | |
952 | error = rfkill_led_trigger_register(rfkill); |
953 | if (error) |
954 | goto devdel; |
955 | |
956 | rfkill->registered = true; |
957 | |
958 | INIT_DELAYED_WORK(&rfkill->poll_work, rfkill_poll); |
959 | INIT_WORK(&rfkill->uevent_work, rfkill_uevent_work); |
960 | INIT_WORK(&rfkill->sync_work, rfkill_sync_work); |
961 | |
962 | if (rfkill->ops->poll) |
963 | queue_delayed_work(system_power_efficient_wq, |
964 | &rfkill->poll_work, |
965 | round_jiffies_relative(POLL_INTERVAL)); |
966 | |
967 | if (!rfkill->persistent || rfkill_epo_lock_active) { |
968 | schedule_work(&rfkill->sync_work); |
969 | } else { |
970 | #ifdef CONFIG_RFKILL_INPUT |
971 | bool soft_blocked = !!(rfkill->state & RFKILL_BLOCK_SW); |
972 | |
973 | if (!atomic_read(&rfkill_input_disabled)) |
974 | __rfkill_switch_all(rfkill->type, soft_blocked); |
975 | #endif |
976 | } |
977 | |
978 | rfkill_send_events(rfkill, RFKILL_OP_ADD); |
979 | |
980 | mutex_unlock(&rfkill_global_mutex); |
981 | return 0; |
982 | |
983 | devdel: |
984 | device_del(&rfkill->dev); |
985 | remove: |
986 | list_del_init(&rfkill->node); |
987 | unlock: |
988 | mutex_unlock(&rfkill_global_mutex); |
989 | return error; |
990 | } |
991 | EXPORT_SYMBOL(rfkill_register); |
992 | |
993 | void rfkill_unregister(struct rfkill *rfkill) |
994 | { |
995 | BUG_ON(!rfkill); |
996 | |
997 | if (rfkill->ops->poll) |
998 | cancel_delayed_work_sync(&rfkill->poll_work); |
999 | |
1000 | cancel_work_sync(&rfkill->uevent_work); |
1001 | cancel_work_sync(&rfkill->sync_work); |
1002 | |
1003 | rfkill->registered = false; |
1004 | |
1005 | device_del(&rfkill->dev); |
1006 | |
1007 | mutex_lock(&rfkill_global_mutex); |
1008 | rfkill_send_events(rfkill, RFKILL_OP_DEL); |
1009 | list_del_init(&rfkill->node); |
1010 | mutex_unlock(&rfkill_global_mutex); |
1011 | |
1012 | rfkill_led_trigger_unregister(rfkill); |
1013 | } |
1014 | EXPORT_SYMBOL(rfkill_unregister); |
1015 | |
1016 | void rfkill_destroy(struct rfkill *rfkill) |
1017 | { |
1018 | if (rfkill) |
1019 | put_device(&rfkill->dev); |
1020 | } |
1021 | EXPORT_SYMBOL(rfkill_destroy); |
1022 | |
1023 | static int rfkill_fop_open(struct inode *inode, struct file *file) |
1024 | { |
1025 | struct rfkill_data *data; |
1026 | struct rfkill *rfkill; |
1027 | struct rfkill_int_event *ev, *tmp; |
1028 | |
1029 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
1030 | if (!data) |
1031 | return -ENOMEM; |
1032 | |
1033 | INIT_LIST_HEAD(&data->events); |
1034 | mutex_init(&data->mtx); |
1035 | init_waitqueue_head(&data->read_wait); |
1036 | |
1037 | mutex_lock(&rfkill_global_mutex); |
1038 | mutex_lock(&data->mtx); |
1039 | /* |
1040 | * start getting events from elsewhere but hold mtx to get |
1041 | * startup events added first |
1042 | */ |
1043 | |
1044 | list_for_each_entry(rfkill, &rfkill_list, node) { |
1045 | ev = kzalloc(sizeof(*ev), GFP_KERNEL); |
1046 | if (!ev) |
1047 | goto free; |
1048 | rfkill_fill_event(&ev->ev, rfkill, RFKILL_OP_ADD); |
1049 | list_add_tail(&ev->list, &data->events); |
1050 | } |
1051 | list_add(&data->list, &rfkill_fds); |
1052 | mutex_unlock(&data->mtx); |
1053 | mutex_unlock(&rfkill_global_mutex); |
1054 | |
1055 | file->private_data = data; |
1056 | |
1057 | return nonseekable_open(inode, file); |
1058 | |
1059 | free: |
1060 | mutex_unlock(&data->mtx); |
1061 | mutex_unlock(&rfkill_global_mutex); |
1062 | mutex_destroy(&data->mtx); |
1063 | list_for_each_entry_safe(ev, tmp, &data->events, list) |
1064 | kfree(ev); |
1065 | kfree(data); |
1066 | return -ENOMEM; |
1067 | } |
1068 | |
1069 | static unsigned int rfkill_fop_poll(struct file *file, poll_table *wait) |
1070 | { |
1071 | struct rfkill_data *data = file->private_data; |
1072 | unsigned int res = POLLOUT | POLLWRNORM; |
1073 | |
1074 | poll_wait(file, &data->read_wait, wait); |
1075 | |
1076 | mutex_lock(&data->mtx); |
1077 | if (!list_empty(&data->events)) |
1078 | res = POLLIN | POLLRDNORM; |
1079 | mutex_unlock(&data->mtx); |
1080 | |
1081 | return res; |
1082 | } |
1083 | |
1084 | static bool rfkill_readable(struct rfkill_data *data) |
1085 | { |
1086 | bool r; |
1087 | |
1088 | mutex_lock(&data->mtx); |
1089 | r = !list_empty(&data->events); |
1090 | mutex_unlock(&data->mtx); |
1091 | |
1092 | return r; |
1093 | } |
1094 | |
1095 | static ssize_t rfkill_fop_read(struct file *file, char __user *buf, |
1096 | size_t count, loff_t *pos) |
1097 | { |
1098 | struct rfkill_data *data = file->private_data; |
1099 | struct rfkill_int_event *ev; |
1100 | unsigned long sz; |
1101 | int ret; |
1102 | |
1103 | mutex_lock(&data->mtx); |
1104 | |
1105 | while (list_empty(&data->events)) { |
1106 | if (file->f_flags & O_NONBLOCK) { |
1107 | ret = -EAGAIN; |
1108 | goto out; |
1109 | } |
1110 | mutex_unlock(&data->mtx); |
1111 | ret = wait_event_interruptible(data->read_wait, |
1112 | rfkill_readable(data)); |
1113 | mutex_lock(&data->mtx); |
1114 | |
1115 | if (ret) |
1116 | goto out; |
1117 | } |
1118 | |
1119 | ev = list_first_entry(&data->events, struct rfkill_int_event, |
1120 | list); |
1121 | |
1122 | sz = min_t(unsigned long, sizeof(ev->ev), count); |
1123 | ret = sz; |
1124 | if (copy_to_user(buf, &ev->ev, sz)) |
1125 | ret = -EFAULT; |
1126 | |
1127 | list_del(&ev->list); |
1128 | kfree(ev); |
1129 | out: |
1130 | mutex_unlock(&data->mtx); |
1131 | return ret; |
1132 | } |
1133 | |
1134 | static ssize_t rfkill_fop_write(struct file *file, const char __user *buf, |
1135 | size_t count, loff_t *pos) |
1136 | { |
1137 | struct rfkill *rfkill; |
1138 | struct rfkill_event ev; |
1139 | |
1140 | /* we don't need the 'hard' variable but accept it */ |
1141 | if (count < RFKILL_EVENT_SIZE_V1 - 1) |
1142 | return -EINVAL; |
1143 | |
1144 | /* |
1145 | * Copy as much data as we can accept into our 'ev' buffer, |
1146 | * but tell userspace how much we've copied so it can determine |
1147 | * our API version even in a write() call, if it cares. |
1148 | */ |
1149 | count = min(count, sizeof(ev)); |
1150 | if (copy_from_user(&ev, buf, count)) |
1151 | return -EFAULT; |
1152 | |
1153 | if (ev.op != RFKILL_OP_CHANGE && ev.op != RFKILL_OP_CHANGE_ALL) |
1154 | return -EINVAL; |
1155 | |
1156 | if (ev.type >= NUM_RFKILL_TYPES) |
1157 | return -EINVAL; |
1158 | |
1159 | mutex_lock(&rfkill_global_mutex); |
1160 | |
1161 | if (ev.op == RFKILL_OP_CHANGE_ALL) { |
1162 | if (ev.type == RFKILL_TYPE_ALL) { |
1163 | enum rfkill_type i; |
1164 | for (i = 0; i < NUM_RFKILL_TYPES; i++) |
1165 | rfkill_global_states[i].cur = ev.soft; |
1166 | } else { |
1167 | rfkill_global_states[ev.type].cur = ev.soft; |
1168 | } |
1169 | } |
1170 | |
1171 | list_for_each_entry(rfkill, &rfkill_list, node) { |
1172 | if (rfkill->idx != ev.idx && ev.op != RFKILL_OP_CHANGE_ALL) |
1173 | continue; |
1174 | |
1175 | if (rfkill->type != ev.type && ev.type != RFKILL_TYPE_ALL) |
1176 | continue; |
1177 | |
1178 | rfkill_set_block(rfkill, ev.soft); |
1179 | } |
1180 | mutex_unlock(&rfkill_global_mutex); |
1181 | |
1182 | return count; |
1183 | } |
1184 | |
1185 | static int rfkill_fop_release(struct inode *inode, struct file *file) |
1186 | { |
1187 | struct rfkill_data *data = file->private_data; |
1188 | struct rfkill_int_event *ev, *tmp; |
1189 | |
1190 | mutex_lock(&rfkill_global_mutex); |
1191 | list_del(&data->list); |
1192 | mutex_unlock(&rfkill_global_mutex); |
1193 | |
1194 | mutex_destroy(&data->mtx); |
1195 | list_for_each_entry_safe(ev, tmp, &data->events, list) |
1196 | kfree(ev); |
1197 | |
1198 | #ifdef CONFIG_RFKILL_INPUT |
1199 | if (data->input_handler) |
1200 | if (atomic_dec_return(&rfkill_input_disabled) == 0) |
1201 | printk(KERN_DEBUG "rfkill: input handler enabled\n"); |
1202 | #endif |
1203 | |
1204 | kfree(data); |
1205 | |
1206 | return 0; |
1207 | } |
1208 | |
1209 | #ifdef CONFIG_RFKILL_INPUT |
1210 | static long rfkill_fop_ioctl(struct file *file, unsigned int cmd, |
1211 | unsigned long arg) |
1212 | { |
1213 | struct rfkill_data *data = file->private_data; |
1214 | |
1215 | if (_IOC_TYPE(cmd) != RFKILL_IOC_MAGIC) |
1216 | return -ENOSYS; |
1217 | |
1218 | if (_IOC_NR(cmd) != RFKILL_IOC_NOINPUT) |
1219 | return -ENOSYS; |
1220 | |
1221 | mutex_lock(&data->mtx); |
1222 | |
1223 | if (!data->input_handler) { |
1224 | if (atomic_inc_return(&rfkill_input_disabled) == 1) |
1225 | printk(KERN_DEBUG "rfkill: input handler disabled\n"); |
1226 | data->input_handler = true; |
1227 | } |
1228 | |
1229 | mutex_unlock(&data->mtx); |
1230 | |
1231 | return 0; |
1232 | } |
1233 | #endif |
1234 | |
1235 | static const struct file_operations rfkill_fops = { |
1236 | .owner = THIS_MODULE, |
1237 | .open = rfkill_fop_open, |
1238 | .read = rfkill_fop_read, |
1239 | .write = rfkill_fop_write, |
1240 | .poll = rfkill_fop_poll, |
1241 | .release = rfkill_fop_release, |
1242 | #ifdef CONFIG_RFKILL_INPUT |
1243 | .unlocked_ioctl = rfkill_fop_ioctl, |
1244 | .compat_ioctl = rfkill_fop_ioctl, |
1245 | #endif |
1246 | .llseek = no_llseek, |
1247 | }; |
1248 | |
1249 | static struct miscdevice rfkill_miscdev = { |
1250 | .name = "rfkill", |
1251 | .fops = &rfkill_fops, |
1252 | .minor = MISC_DYNAMIC_MINOR, |
1253 | }; |
1254 | |
1255 | static int __init rfkill_init(void) |
1256 | { |
1257 | int error; |
1258 | int i; |
1259 | |
1260 | for (i = 0; i < NUM_RFKILL_TYPES; i++) |
1261 | rfkill_global_states[i].cur = !rfkill_default_state; |
1262 | |
1263 | error = class_register(&rfkill_class); |
1264 | if (error) |
1265 | goto out; |
1266 | |
1267 | error = misc_register(&rfkill_miscdev); |
1268 | if (error) { |
1269 | class_unregister(&rfkill_class); |
1270 | goto out; |
1271 | } |
1272 | |
1273 | #ifdef CONFIG_RFKILL_INPUT |
1274 | error = rfkill_handler_init(); |
1275 | if (error) { |
1276 | misc_deregister(&rfkill_miscdev); |
1277 | class_unregister(&rfkill_class); |
1278 | goto out; |
1279 | } |
1280 | #endif |
1281 | |
1282 | out: |
1283 | return error; |
1284 | } |
1285 | subsys_initcall(rfkill_init); |
1286 | |
1287 | static void __exit rfkill_exit(void) |
1288 | { |
1289 | #ifdef CONFIG_RFKILL_INPUT |
1290 | rfkill_handler_exit(); |
1291 | #endif |
1292 | misc_deregister(&rfkill_miscdev); |
1293 | class_unregister(&rfkill_class); |
1294 | } |
1295 | module_exit(rfkill_exit); |
1296 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9