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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> | |
a99bbaf5 | 30 | #include <linux/sched.h> |
19d337df | 31 | #include <linux/spinlock.h> |
c64fb016 JB |
32 | #include <linux/miscdevice.h> |
33 | #include <linux/wait.h> | |
34 | #include <linux/poll.h> | |
35 | #include <linux/fs.h> | |
19d337df JB |
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 | ||
c64fb016 JB |
57 | u32 idx; |
58 | ||
19d337df | 59 | bool registered; |
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 | 226 | { |
06d5caf4 | 227 | if (!rfkill->registered) |
19d337df JB |
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 | ||
06d5caf4 AJ |
511 | if (!rfkill->registered) |
512 | return blocked; | |
19d337df | 513 | |
06d5caf4 AJ |
514 | if (prev != blocked && !hwblock) |
515 | schedule_work(&rfkill->uevent_work); | |
516 | ||
517 | rfkill_led_trigger_event(rfkill); | |
19d337df JB |
518 | |
519 | return blocked; | |
520 | } | |
521 | EXPORT_SYMBOL(rfkill_set_sw_state); | |
522 | ||
06d5caf4 AJ |
523 | void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked) |
524 | { | |
525 | unsigned long flags; | |
526 | ||
527 | BUG_ON(!rfkill); | |
528 | BUG_ON(rfkill->registered); | |
529 | ||
530 | spin_lock_irqsave(&rfkill->lock, flags); | |
531 | __rfkill_set_sw_state(rfkill, blocked); | |
532 | rfkill->persistent = true; | |
533 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
534 | } | |
535 | EXPORT_SYMBOL(rfkill_init_sw_state); | |
536 | ||
19d337df JB |
537 | void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw) |
538 | { | |
539 | unsigned long flags; | |
540 | bool swprev, hwprev; | |
541 | ||
542 | BUG_ON(!rfkill); | |
543 | ||
544 | spin_lock_irqsave(&rfkill->lock, flags); | |
545 | ||
546 | /* | |
547 | * No need to care about prev/setblock ... this is for uevent only | |
548 | * and that will get triggered by rfkill_set_block anyway. | |
549 | */ | |
550 | swprev = !!(rfkill->state & RFKILL_BLOCK_SW); | |
551 | hwprev = !!(rfkill->state & RFKILL_BLOCK_HW); | |
552 | __rfkill_set_sw_state(rfkill, sw); | |
48ab3578 AJ |
553 | if (hw) |
554 | rfkill->state |= RFKILL_BLOCK_HW; | |
555 | else | |
556 | rfkill->state &= ~RFKILL_BLOCK_HW; | |
19d337df JB |
557 | |
558 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
559 | ||
b3fa1329 AJ |
560 | if (!rfkill->registered) { |
561 | rfkill->persistent = true; | |
562 | } else { | |
563 | if (swprev != sw || hwprev != hw) | |
564 | schedule_work(&rfkill->uevent_work); | |
19d337df | 565 | |
b3fa1329 AJ |
566 | rfkill_led_trigger_event(rfkill); |
567 | } | |
19d337df JB |
568 | } |
569 | EXPORT_SYMBOL(rfkill_set_states); | |
570 | ||
571 | static ssize_t rfkill_name_show(struct device *dev, | |
572 | struct device_attribute *attr, | |
573 | char *buf) | |
574 | { | |
575 | struct rfkill *rfkill = to_rfkill(dev); | |
576 | ||
577 | return sprintf(buf, "%s\n", rfkill->name); | |
578 | } | |
579 | ||
580 | static const char *rfkill_get_type_str(enum rfkill_type type) | |
581 | { | |
582 | switch (type) { | |
583 | case RFKILL_TYPE_WLAN: | |
584 | return "wlan"; | |
585 | case RFKILL_TYPE_BLUETOOTH: | |
586 | return "bluetooth"; | |
587 | case RFKILL_TYPE_UWB: | |
588 | return "ultrawideband"; | |
589 | case RFKILL_TYPE_WIMAX: | |
590 | return "wimax"; | |
591 | case RFKILL_TYPE_WWAN: | |
592 | return "wwan"; | |
3ad20149 TW |
593 | case RFKILL_TYPE_GPS: |
594 | return "gps"; | |
19d337df JB |
595 | default: |
596 | BUG(); | |
597 | } | |
598 | ||
3ad20149 | 599 | BUILD_BUG_ON(NUM_RFKILL_TYPES != RFKILL_TYPE_GPS + 1); |
19d337df JB |
600 | } |
601 | ||
602 | static ssize_t rfkill_type_show(struct device *dev, | |
603 | struct device_attribute *attr, | |
604 | char *buf) | |
605 | { | |
606 | struct rfkill *rfkill = to_rfkill(dev); | |
607 | ||
608 | return sprintf(buf, "%s\n", rfkill_get_type_str(rfkill->type)); | |
609 | } | |
610 | ||
c64fb016 JB |
611 | static ssize_t rfkill_idx_show(struct device *dev, |
612 | struct device_attribute *attr, | |
613 | char *buf) | |
614 | { | |
615 | struct rfkill *rfkill = to_rfkill(dev); | |
616 | ||
617 | return sprintf(buf, "%d\n", rfkill->idx); | |
618 | } | |
619 | ||
464902e8 AJ |
620 | static ssize_t rfkill_persistent_show(struct device *dev, |
621 | struct device_attribute *attr, | |
622 | char *buf) | |
623 | { | |
624 | struct rfkill *rfkill = to_rfkill(dev); | |
625 | ||
626 | return sprintf(buf, "%d\n", rfkill->persistent); | |
627 | } | |
628 | ||
19d337df JB |
629 | static u8 user_state_from_blocked(unsigned long state) |
630 | { | |
631 | if (state & RFKILL_BLOCK_HW) | |
632 | return RFKILL_USER_STATE_HARD_BLOCKED; | |
633 | if (state & RFKILL_BLOCK_SW) | |
634 | return RFKILL_USER_STATE_SOFT_BLOCKED; | |
635 | ||
636 | return RFKILL_USER_STATE_UNBLOCKED; | |
637 | } | |
638 | ||
639 | static ssize_t rfkill_state_show(struct device *dev, | |
640 | struct device_attribute *attr, | |
641 | char *buf) | |
642 | { | |
643 | struct rfkill *rfkill = to_rfkill(dev); | |
644 | unsigned long flags; | |
645 | u32 state; | |
646 | ||
647 | spin_lock_irqsave(&rfkill->lock, flags); | |
648 | state = rfkill->state; | |
649 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
650 | ||
651 | return sprintf(buf, "%d\n", user_state_from_blocked(state)); | |
652 | } | |
653 | ||
654 | static ssize_t rfkill_state_store(struct device *dev, | |
655 | struct device_attribute *attr, | |
656 | const char *buf, size_t count) | |
657 | { | |
f54c1427 JB |
658 | struct rfkill *rfkill = to_rfkill(dev); |
659 | unsigned long state; | |
660 | int err; | |
661 | ||
662 | if (!capable(CAP_NET_ADMIN)) | |
663 | return -EPERM; | |
664 | ||
665 | err = strict_strtoul(buf, 0, &state); | |
666 | if (err) | |
667 | return err; | |
668 | ||
669 | if (state != RFKILL_USER_STATE_SOFT_BLOCKED && | |
670 | state != RFKILL_USER_STATE_UNBLOCKED) | |
671 | return -EINVAL; | |
672 | ||
673 | mutex_lock(&rfkill_global_mutex); | |
674 | rfkill_set_block(rfkill, state == RFKILL_USER_STATE_SOFT_BLOCKED); | |
675 | mutex_unlock(&rfkill_global_mutex); | |
19d337df | 676 | |
f54c1427 | 677 | return err ?: count; |
19d337df JB |
678 | } |
679 | ||
680 | static ssize_t rfkill_claim_show(struct device *dev, | |
681 | struct device_attribute *attr, | |
682 | char *buf) | |
683 | { | |
684 | return sprintf(buf, "%d\n", 0); | |
685 | } | |
686 | ||
687 | static ssize_t rfkill_claim_store(struct device *dev, | |
688 | struct device_attribute *attr, | |
689 | const char *buf, size_t count) | |
690 | { | |
691 | return -EOPNOTSUPP; | |
692 | } | |
693 | ||
694 | static struct device_attribute rfkill_dev_attrs[] = { | |
695 | __ATTR(name, S_IRUGO, rfkill_name_show, NULL), | |
696 | __ATTR(type, S_IRUGO, rfkill_type_show, NULL), | |
c64fb016 | 697 | __ATTR(index, S_IRUGO, rfkill_idx_show, NULL), |
464902e8 | 698 | __ATTR(persistent, S_IRUGO, rfkill_persistent_show, NULL), |
19d337df JB |
699 | __ATTR(state, S_IRUGO|S_IWUSR, rfkill_state_show, rfkill_state_store), |
700 | __ATTR(claim, S_IRUGO|S_IWUSR, rfkill_claim_show, rfkill_claim_store), | |
701 | __ATTR_NULL | |
702 | }; | |
703 | ||
704 | static void rfkill_release(struct device *dev) | |
705 | { | |
706 | struct rfkill *rfkill = to_rfkill(dev); | |
707 | ||
708 | kfree(rfkill); | |
709 | } | |
710 | ||
711 | static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env) | |
712 | { | |
713 | struct rfkill *rfkill = to_rfkill(dev); | |
714 | unsigned long flags; | |
715 | u32 state; | |
716 | int error; | |
717 | ||
718 | error = add_uevent_var(env, "RFKILL_NAME=%s", rfkill->name); | |
719 | if (error) | |
720 | return error; | |
721 | error = add_uevent_var(env, "RFKILL_TYPE=%s", | |
722 | rfkill_get_type_str(rfkill->type)); | |
723 | if (error) | |
724 | return error; | |
725 | spin_lock_irqsave(&rfkill->lock, flags); | |
726 | state = rfkill->state; | |
727 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
728 | error = add_uevent_var(env, "RFKILL_STATE=%d", | |
729 | user_state_from_blocked(state)); | |
730 | return error; | |
731 | } | |
732 | ||
733 | void rfkill_pause_polling(struct rfkill *rfkill) | |
734 | { | |
735 | BUG_ON(!rfkill); | |
736 | ||
737 | if (!rfkill->ops->poll) | |
738 | return; | |
739 | ||
740 | cancel_delayed_work_sync(&rfkill->poll_work); | |
741 | } | |
742 | EXPORT_SYMBOL(rfkill_pause_polling); | |
743 | ||
744 | void rfkill_resume_polling(struct rfkill *rfkill) | |
745 | { | |
746 | BUG_ON(!rfkill); | |
747 | ||
748 | if (!rfkill->ops->poll) | |
749 | return; | |
750 | ||
751 | schedule_work(&rfkill->poll_work.work); | |
752 | } | |
753 | EXPORT_SYMBOL(rfkill_resume_polling); | |
754 | ||
755 | static int rfkill_suspend(struct device *dev, pm_message_t state) | |
756 | { | |
757 | struct rfkill *rfkill = to_rfkill(dev); | |
758 | ||
759 | rfkill_pause_polling(rfkill); | |
760 | ||
19d337df JB |
761 | return 0; |
762 | } | |
763 | ||
764 | static int rfkill_resume(struct device *dev) | |
765 | { | |
766 | struct rfkill *rfkill = to_rfkill(dev); | |
767 | bool cur; | |
768 | ||
06d5caf4 AJ |
769 | if (!rfkill->persistent) { |
770 | cur = !!(rfkill->state & RFKILL_BLOCK_SW); | |
771 | rfkill_set_block(rfkill, cur); | |
772 | } | |
19d337df | 773 | |
19d337df JB |
774 | rfkill_resume_polling(rfkill); |
775 | ||
776 | return 0; | |
777 | } | |
778 | ||
779 | static struct class rfkill_class = { | |
780 | .name = "rfkill", | |
781 | .dev_release = rfkill_release, | |
782 | .dev_attrs = rfkill_dev_attrs, | |
783 | .dev_uevent = rfkill_dev_uevent, | |
784 | .suspend = rfkill_suspend, | |
785 | .resume = rfkill_resume, | |
786 | }; | |
787 | ||
6081162e JB |
788 | bool rfkill_blocked(struct rfkill *rfkill) |
789 | { | |
790 | unsigned long flags; | |
791 | u32 state; | |
792 | ||
793 | spin_lock_irqsave(&rfkill->lock, flags); | |
794 | state = rfkill->state; | |
795 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
796 | ||
797 | return !!(state & RFKILL_BLOCK_ANY); | |
798 | } | |
799 | EXPORT_SYMBOL(rfkill_blocked); | |
800 | ||
19d337df JB |
801 | |
802 | struct rfkill * __must_check rfkill_alloc(const char *name, | |
803 | struct device *parent, | |
804 | const enum rfkill_type type, | |
805 | const struct rfkill_ops *ops, | |
806 | void *ops_data) | |
807 | { | |
808 | struct rfkill *rfkill; | |
809 | struct device *dev; | |
810 | ||
811 | if (WARN_ON(!ops)) | |
812 | return NULL; | |
813 | ||
814 | if (WARN_ON(!ops->set_block)) | |
815 | return NULL; | |
816 | ||
817 | if (WARN_ON(!name)) | |
818 | return NULL; | |
819 | ||
c64fb016 | 820 | if (WARN_ON(type == RFKILL_TYPE_ALL || type >= NUM_RFKILL_TYPES)) |
19d337df JB |
821 | return NULL; |
822 | ||
823 | rfkill = kzalloc(sizeof(*rfkill), GFP_KERNEL); | |
824 | if (!rfkill) | |
825 | return NULL; | |
826 | ||
827 | spin_lock_init(&rfkill->lock); | |
828 | INIT_LIST_HEAD(&rfkill->node); | |
829 | rfkill->type = type; | |
830 | rfkill->name = name; | |
831 | rfkill->ops = ops; | |
832 | rfkill->data = ops_data; | |
833 | ||
834 | dev = &rfkill->dev; | |
835 | dev->class = &rfkill_class; | |
836 | dev->parent = parent; | |
837 | device_initialize(dev); | |
838 | ||
839 | return rfkill; | |
840 | } | |
841 | EXPORT_SYMBOL(rfkill_alloc); | |
842 | ||
843 | static void rfkill_poll(struct work_struct *work) | |
844 | { | |
845 | struct rfkill *rfkill; | |
846 | ||
847 | rfkill = container_of(work, struct rfkill, poll_work.work); | |
848 | ||
849 | /* | |
850 | * Poll hardware state -- driver will use one of the | |
851 | * rfkill_set{,_hw,_sw}_state functions and use its | |
852 | * return value to update the current status. | |
853 | */ | |
854 | rfkill->ops->poll(rfkill, rfkill->data); | |
855 | ||
856 | schedule_delayed_work(&rfkill->poll_work, | |
857 | round_jiffies_relative(POLL_INTERVAL)); | |
858 | } | |
859 | ||
860 | static void rfkill_uevent_work(struct work_struct *work) | |
861 | { | |
862 | struct rfkill *rfkill; | |
863 | ||
864 | rfkill = container_of(work, struct rfkill, uevent_work); | |
865 | ||
c64fb016 JB |
866 | mutex_lock(&rfkill_global_mutex); |
867 | rfkill_event(rfkill); | |
868 | mutex_unlock(&rfkill_global_mutex); | |
19d337df JB |
869 | } |
870 | ||
871 | static void rfkill_sync_work(struct work_struct *work) | |
872 | { | |
873 | struct rfkill *rfkill; | |
874 | bool cur; | |
875 | ||
876 | rfkill = container_of(work, struct rfkill, sync_work); | |
877 | ||
878 | mutex_lock(&rfkill_global_mutex); | |
879 | cur = rfkill_global_states[rfkill->type].cur; | |
880 | rfkill_set_block(rfkill, cur); | |
881 | mutex_unlock(&rfkill_global_mutex); | |
882 | } | |
883 | ||
884 | int __must_check rfkill_register(struct rfkill *rfkill) | |
885 | { | |
886 | static unsigned long rfkill_no; | |
887 | struct device *dev = &rfkill->dev; | |
888 | int error; | |
889 | ||
890 | BUG_ON(!rfkill); | |
891 | ||
892 | mutex_lock(&rfkill_global_mutex); | |
893 | ||
894 | if (rfkill->registered) { | |
895 | error = -EALREADY; | |
896 | goto unlock; | |
897 | } | |
898 | ||
c64fb016 | 899 | rfkill->idx = rfkill_no; |
19d337df JB |
900 | dev_set_name(dev, "rfkill%lu", rfkill_no); |
901 | rfkill_no++; | |
902 | ||
19d337df JB |
903 | list_add_tail(&rfkill->node, &rfkill_list); |
904 | ||
905 | error = device_add(dev); | |
906 | if (error) | |
907 | goto remove; | |
908 | ||
909 | error = rfkill_led_trigger_register(rfkill); | |
910 | if (error) | |
911 | goto devdel; | |
912 | ||
913 | rfkill->registered = true; | |
914 | ||
2ec2c68c | 915 | INIT_DELAYED_WORK(&rfkill->poll_work, rfkill_poll); |
19d337df | 916 | INIT_WORK(&rfkill->uevent_work, rfkill_uevent_work); |
19d337df | 917 | INIT_WORK(&rfkill->sync_work, rfkill_sync_work); |
2ec2c68c JB |
918 | |
919 | if (rfkill->ops->poll) | |
920 | schedule_delayed_work(&rfkill->poll_work, | |
921 | round_jiffies_relative(POLL_INTERVAL)); | |
b3fa1329 AJ |
922 | |
923 | if (!rfkill->persistent || rfkill_epo_lock_active) { | |
924 | schedule_work(&rfkill->sync_work); | |
925 | } else { | |
926 | #ifdef CONFIG_RFKILL_INPUT | |
927 | bool soft_blocked = !!(rfkill->state & RFKILL_BLOCK_SW); | |
928 | ||
929 | if (!atomic_read(&rfkill_input_disabled)) | |
930 | __rfkill_switch_all(rfkill->type, soft_blocked); | |
931 | #endif | |
932 | } | |
2ec2c68c | 933 | |
c64fb016 | 934 | rfkill_send_events(rfkill, RFKILL_OP_ADD); |
19d337df JB |
935 | |
936 | mutex_unlock(&rfkill_global_mutex); | |
937 | return 0; | |
938 | ||
939 | devdel: | |
940 | device_del(&rfkill->dev); | |
941 | remove: | |
942 | list_del_init(&rfkill->node); | |
943 | unlock: | |
944 | mutex_unlock(&rfkill_global_mutex); | |
945 | return error; | |
946 | } | |
947 | EXPORT_SYMBOL(rfkill_register); | |
948 | ||
949 | void rfkill_unregister(struct rfkill *rfkill) | |
950 | { | |
951 | BUG_ON(!rfkill); | |
952 | ||
953 | if (rfkill->ops->poll) | |
954 | cancel_delayed_work_sync(&rfkill->poll_work); | |
955 | ||
956 | cancel_work_sync(&rfkill->uevent_work); | |
957 | cancel_work_sync(&rfkill->sync_work); | |
958 | ||
959 | rfkill->registered = false; | |
960 | ||
961 | device_del(&rfkill->dev); | |
962 | ||
963 | mutex_lock(&rfkill_global_mutex); | |
c64fb016 | 964 | rfkill_send_events(rfkill, RFKILL_OP_DEL); |
19d337df JB |
965 | list_del_init(&rfkill->node); |
966 | mutex_unlock(&rfkill_global_mutex); | |
967 | ||
968 | rfkill_led_trigger_unregister(rfkill); | |
969 | } | |
970 | EXPORT_SYMBOL(rfkill_unregister); | |
971 | ||
972 | void rfkill_destroy(struct rfkill *rfkill) | |
973 | { | |
974 | if (rfkill) | |
975 | put_device(&rfkill->dev); | |
976 | } | |
977 | EXPORT_SYMBOL(rfkill_destroy); | |
978 | ||
c64fb016 JB |
979 | static int rfkill_fop_open(struct inode *inode, struct file *file) |
980 | { | |
981 | struct rfkill_data *data; | |
982 | struct rfkill *rfkill; | |
983 | struct rfkill_int_event *ev, *tmp; | |
984 | ||
985 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
986 | if (!data) | |
987 | return -ENOMEM; | |
988 | ||
989 | INIT_LIST_HEAD(&data->events); | |
990 | mutex_init(&data->mtx); | |
991 | init_waitqueue_head(&data->read_wait); | |
992 | ||
993 | mutex_lock(&rfkill_global_mutex); | |
994 | mutex_lock(&data->mtx); | |
995 | /* | |
996 | * start getting events from elsewhere but hold mtx to get | |
997 | * startup events added first | |
998 | */ | |
999 | list_add(&data->list, &rfkill_fds); | |
1000 | ||
1001 | list_for_each_entry(rfkill, &rfkill_list, node) { | |
1002 | ev = kzalloc(sizeof(*ev), GFP_KERNEL); | |
1003 | if (!ev) | |
1004 | goto free; | |
1005 | rfkill_fill_event(&ev->ev, rfkill, RFKILL_OP_ADD); | |
1006 | list_add_tail(&ev->list, &data->events); | |
1007 | } | |
1008 | mutex_unlock(&data->mtx); | |
1009 | mutex_unlock(&rfkill_global_mutex); | |
1010 | ||
1011 | file->private_data = data; | |
1012 | ||
1013 | return nonseekable_open(inode, file); | |
1014 | ||
1015 | free: | |
1016 | mutex_unlock(&data->mtx); | |
1017 | mutex_unlock(&rfkill_global_mutex); | |
1018 | mutex_destroy(&data->mtx); | |
1019 | list_for_each_entry_safe(ev, tmp, &data->events, list) | |
1020 | kfree(ev); | |
1021 | kfree(data); | |
1022 | return -ENOMEM; | |
1023 | } | |
1024 | ||
1025 | static unsigned int rfkill_fop_poll(struct file *file, poll_table *wait) | |
1026 | { | |
1027 | struct rfkill_data *data = file->private_data; | |
1028 | unsigned int res = POLLOUT | POLLWRNORM; | |
1029 | ||
1030 | poll_wait(file, &data->read_wait, wait); | |
1031 | ||
1032 | mutex_lock(&data->mtx); | |
1033 | if (!list_empty(&data->events)) | |
1034 | res = POLLIN | POLLRDNORM; | |
1035 | mutex_unlock(&data->mtx); | |
1036 | ||
1037 | return res; | |
1038 | } | |
1039 | ||
1040 | static bool rfkill_readable(struct rfkill_data *data) | |
1041 | { | |
1042 | bool r; | |
1043 | ||
1044 | mutex_lock(&data->mtx); | |
1045 | r = !list_empty(&data->events); | |
1046 | mutex_unlock(&data->mtx); | |
1047 | ||
1048 | return r; | |
1049 | } | |
1050 | ||
1051 | static ssize_t rfkill_fop_read(struct file *file, char __user *buf, | |
1052 | size_t count, loff_t *pos) | |
1053 | { | |
1054 | struct rfkill_data *data = file->private_data; | |
1055 | struct rfkill_int_event *ev; | |
1056 | unsigned long sz; | |
1057 | int ret; | |
1058 | ||
1059 | mutex_lock(&data->mtx); | |
1060 | ||
1061 | while (list_empty(&data->events)) { | |
1062 | if (file->f_flags & O_NONBLOCK) { | |
1063 | ret = -EAGAIN; | |
1064 | goto out; | |
1065 | } | |
1066 | mutex_unlock(&data->mtx); | |
1067 | ret = wait_event_interruptible(data->read_wait, | |
1068 | rfkill_readable(data)); | |
1069 | mutex_lock(&data->mtx); | |
1070 | ||
1071 | if (ret) | |
1072 | goto out; | |
1073 | } | |
1074 | ||
1075 | ev = list_first_entry(&data->events, struct rfkill_int_event, | |
1076 | list); | |
1077 | ||
1078 | sz = min_t(unsigned long, sizeof(ev->ev), count); | |
1079 | ret = sz; | |
1080 | if (copy_to_user(buf, &ev->ev, sz)) | |
1081 | ret = -EFAULT; | |
1082 | ||
1083 | list_del(&ev->list); | |
1084 | kfree(ev); | |
1085 | out: | |
1086 | mutex_unlock(&data->mtx); | |
1087 | return ret; | |
1088 | } | |
1089 | ||
1090 | static ssize_t rfkill_fop_write(struct file *file, const char __user *buf, | |
1091 | size_t count, loff_t *pos) | |
1092 | { | |
1093 | struct rfkill *rfkill; | |
1094 | struct rfkill_event ev; | |
1095 | ||
1096 | /* we don't need the 'hard' variable but accept it */ | |
1be491fc | 1097 | if (count < RFKILL_EVENT_SIZE_V1 - 1) |
c64fb016 JB |
1098 | return -EINVAL; |
1099 | ||
1be491fc JB |
1100 | /* |
1101 | * Copy as much data as we can accept into our 'ev' buffer, | |
1102 | * but tell userspace how much we've copied so it can determine | |
1103 | * our API version even in a write() call, if it cares. | |
1104 | */ | |
1105 | count = min(count, sizeof(ev)); | |
1106 | if (copy_from_user(&ev, buf, count)) | |
c64fb016 JB |
1107 | return -EFAULT; |
1108 | ||
1109 | if (ev.op != RFKILL_OP_CHANGE && ev.op != RFKILL_OP_CHANGE_ALL) | |
1110 | return -EINVAL; | |
1111 | ||
1112 | if (ev.type >= NUM_RFKILL_TYPES) | |
1113 | return -EINVAL; | |
1114 | ||
1115 | mutex_lock(&rfkill_global_mutex); | |
1116 | ||
1117 | if (ev.op == RFKILL_OP_CHANGE_ALL) { | |
1118 | if (ev.type == RFKILL_TYPE_ALL) { | |
1119 | enum rfkill_type i; | |
1120 | for (i = 0; i < NUM_RFKILL_TYPES; i++) | |
1121 | rfkill_global_states[i].cur = ev.soft; | |
1122 | } else { | |
1123 | rfkill_global_states[ev.type].cur = ev.soft; | |
1124 | } | |
1125 | } | |
1126 | ||
1127 | list_for_each_entry(rfkill, &rfkill_list, node) { | |
1128 | if (rfkill->idx != ev.idx && ev.op != RFKILL_OP_CHANGE_ALL) | |
1129 | continue; | |
1130 | ||
1131 | if (rfkill->type != ev.type && ev.type != RFKILL_TYPE_ALL) | |
1132 | continue; | |
1133 | ||
1134 | rfkill_set_block(rfkill, ev.soft); | |
1135 | } | |
1136 | mutex_unlock(&rfkill_global_mutex); | |
1137 | ||
1138 | return count; | |
1139 | } | |
1140 | ||
1141 | static int rfkill_fop_release(struct inode *inode, struct file *file) | |
1142 | { | |
1143 | struct rfkill_data *data = file->private_data; | |
1144 | struct rfkill_int_event *ev, *tmp; | |
1145 | ||
1146 | mutex_lock(&rfkill_global_mutex); | |
1147 | list_del(&data->list); | |
1148 | mutex_unlock(&rfkill_global_mutex); | |
1149 | ||
1150 | mutex_destroy(&data->mtx); | |
1151 | list_for_each_entry_safe(ev, tmp, &data->events, list) | |
1152 | kfree(ev); | |
1153 | ||
1154 | #ifdef CONFIG_RFKILL_INPUT | |
1155 | if (data->input_handler) | |
207ee162 JB |
1156 | if (atomic_dec_return(&rfkill_input_disabled) == 0) |
1157 | printk(KERN_DEBUG "rfkill: input handler enabled\n"); | |
c64fb016 JB |
1158 | #endif |
1159 | ||
1160 | kfree(data); | |
1161 | ||
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | #ifdef CONFIG_RFKILL_INPUT | |
1166 | static long rfkill_fop_ioctl(struct file *file, unsigned int cmd, | |
1167 | unsigned long arg) | |
1168 | { | |
1169 | struct rfkill_data *data = file->private_data; | |
1170 | ||
1171 | if (_IOC_TYPE(cmd) != RFKILL_IOC_MAGIC) | |
1172 | return -ENOSYS; | |
1173 | ||
1174 | if (_IOC_NR(cmd) != RFKILL_IOC_NOINPUT) | |
1175 | return -ENOSYS; | |
1176 | ||
1177 | mutex_lock(&data->mtx); | |
1178 | ||
1179 | if (!data->input_handler) { | |
207ee162 JB |
1180 | if (atomic_inc_return(&rfkill_input_disabled) == 1) |
1181 | printk(KERN_DEBUG "rfkill: input handler disabled\n"); | |
c64fb016 JB |
1182 | data->input_handler = true; |
1183 | } | |
1184 | ||
1185 | mutex_unlock(&data->mtx); | |
1186 | ||
1187 | return 0; | |
1188 | } | |
1189 | #endif | |
1190 | ||
1191 | static const struct file_operations rfkill_fops = { | |
1192 | .open = rfkill_fop_open, | |
1193 | .read = rfkill_fop_read, | |
1194 | .write = rfkill_fop_write, | |
1195 | .poll = rfkill_fop_poll, | |
1196 | .release = rfkill_fop_release, | |
1197 | #ifdef CONFIG_RFKILL_INPUT | |
1198 | .unlocked_ioctl = rfkill_fop_ioctl, | |
1199 | .compat_ioctl = rfkill_fop_ioctl, | |
1200 | #endif | |
1201 | }; | |
1202 | ||
1203 | static struct miscdevice rfkill_miscdev = { | |
1204 | .name = "rfkill", | |
1205 | .fops = &rfkill_fops, | |
1206 | .minor = MISC_DYNAMIC_MINOR, | |
1207 | }; | |
19d337df JB |
1208 | |
1209 | static int __init rfkill_init(void) | |
1210 | { | |
1211 | int error; | |
1212 | int i; | |
1213 | ||
1214 | for (i = 0; i < NUM_RFKILL_TYPES; i++) | |
b3fa1329 | 1215 | rfkill_global_states[i].cur = !rfkill_default_state; |
19d337df JB |
1216 | |
1217 | error = class_register(&rfkill_class); | |
1218 | if (error) | |
1219 | goto out; | |
1220 | ||
c64fb016 JB |
1221 | error = misc_register(&rfkill_miscdev); |
1222 | if (error) { | |
1223 | class_unregister(&rfkill_class); | |
1224 | goto out; | |
1225 | } | |
1226 | ||
19d337df JB |
1227 | #ifdef CONFIG_RFKILL_INPUT |
1228 | error = rfkill_handler_init(); | |
c64fb016 JB |
1229 | if (error) { |
1230 | misc_deregister(&rfkill_miscdev); | |
19d337df | 1231 | class_unregister(&rfkill_class); |
c64fb016 JB |
1232 | goto out; |
1233 | } | |
19d337df JB |
1234 | #endif |
1235 | ||
1236 | out: | |
1237 | return error; | |
1238 | } | |
1239 | subsys_initcall(rfkill_init); | |
1240 | ||
1241 | static void __exit rfkill_exit(void) | |
1242 | { | |
1243 | #ifdef CONFIG_RFKILL_INPUT | |
1244 | rfkill_handler_exit(); | |
1245 | #endif | |
c64fb016 | 1246 | misc_deregister(&rfkill_miscdev); |
19d337df JB |
1247 | class_unregister(&rfkill_class); |
1248 | } | |
1249 | module_exit(rfkill_exit); |