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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> |
51990e82 | 32 | #include <linux/device.h> |
c64fb016 JB |
33 | #include <linux/miscdevice.h> |
34 | #include <linux/wait.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/fs.h> | |
5a0e3ad6 | 37 | #include <linux/slab.h> |
19d337df JB |
38 | |
39 | #include "rfkill.h" | |
40 | ||
41 | #define POLL_INTERVAL (5 * HZ) | |
42 | ||
43 | #define RFKILL_BLOCK_HW BIT(0) | |
44 | #define RFKILL_BLOCK_SW BIT(1) | |
45 | #define RFKILL_BLOCK_SW_PREV BIT(2) | |
46 | #define RFKILL_BLOCK_ANY (RFKILL_BLOCK_HW |\ | |
47 | RFKILL_BLOCK_SW |\ | |
48 | RFKILL_BLOCK_SW_PREV) | |
49 | #define RFKILL_BLOCK_SW_SETCALL BIT(31) | |
50 | ||
51 | struct rfkill { | |
52 | spinlock_t lock; | |
53 | ||
54 | const char *name; | |
55 | enum rfkill_type type; | |
56 | ||
57 | unsigned long state; | |
58 | ||
c64fb016 JB |
59 | u32 idx; |
60 | ||
19d337df | 61 | bool registered; |
b3fa1329 | 62 | bool persistent; |
19d337df JB |
63 | |
64 | const struct rfkill_ops *ops; | |
65 | void *data; | |
66 | ||
67 | #ifdef CONFIG_RFKILL_LEDS | |
68 | struct led_trigger led_trigger; | |
69 | const char *ledtrigname; | |
70 | #endif | |
71 | ||
72 | struct device dev; | |
73 | struct list_head node; | |
74 | ||
75 | struct delayed_work poll_work; | |
76 | struct work_struct uevent_work; | |
77 | struct work_struct sync_work; | |
78 | }; | |
79 | #define to_rfkill(d) container_of(d, struct rfkill, dev) | |
80 | ||
c64fb016 JB |
81 | struct rfkill_int_event { |
82 | struct list_head list; | |
83 | struct rfkill_event ev; | |
84 | }; | |
85 | ||
86 | struct rfkill_data { | |
87 | struct list_head list; | |
88 | struct list_head events; | |
89 | struct mutex mtx; | |
90 | wait_queue_head_t read_wait; | |
91 | bool input_handler; | |
92 | }; | |
19d337df JB |
93 | |
94 | ||
95 | MODULE_AUTHOR("Ivo van Doorn <IvDoorn@gmail.com>"); | |
96 | MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>"); | |
97 | MODULE_DESCRIPTION("RF switch support"); | |
98 | MODULE_LICENSE("GPL"); | |
99 | ||
100 | ||
101 | /* | |
102 | * The locking here should be made much smarter, we currently have | |
103 | * a bit of a stupid situation because drivers might want to register | |
104 | * the rfkill struct under their own lock, and take this lock during | |
105 | * rfkill method calls -- which will cause an AB-BA deadlock situation. | |
106 | * | |
107 | * To fix that, we need to rework this code here to be mostly lock-free | |
108 | * and only use the mutex for list manipulations, not to protect the | |
109 | * various other global variables. Then we can avoid holding the mutex | |
110 | * around driver operations, and all is happy. | |
111 | */ | |
112 | static LIST_HEAD(rfkill_list); /* list of registered rf switches */ | |
113 | static DEFINE_MUTEX(rfkill_global_mutex); | |
c64fb016 | 114 | static LIST_HEAD(rfkill_fds); /* list of open fds of /dev/rfkill */ |
19d337df JB |
115 | |
116 | static unsigned int rfkill_default_state = 1; | |
117 | module_param_named(default_state, rfkill_default_state, uint, 0444); | |
118 | MODULE_PARM_DESC(default_state, | |
119 | "Default initial state for all radio types, 0 = radio off"); | |
120 | ||
121 | static struct { | |
b3fa1329 | 122 | bool cur, sav; |
19d337df JB |
123 | } rfkill_global_states[NUM_RFKILL_TYPES]; |
124 | ||
19d337df JB |
125 | static bool rfkill_epo_lock_active; |
126 | ||
127 | ||
128 | #ifdef CONFIG_RFKILL_LEDS | |
129 | static void rfkill_led_trigger_event(struct rfkill *rfkill) | |
130 | { | |
131 | struct led_trigger *trigger; | |
132 | ||
133 | if (!rfkill->registered) | |
134 | return; | |
135 | ||
136 | trigger = &rfkill->led_trigger; | |
137 | ||
138 | if (rfkill->state & RFKILL_BLOCK_ANY) | |
139 | led_trigger_event(trigger, LED_OFF); | |
140 | else | |
141 | led_trigger_event(trigger, LED_FULL); | |
142 | } | |
143 | ||
144 | static void rfkill_led_trigger_activate(struct led_classdev *led) | |
145 | { | |
146 | struct rfkill *rfkill; | |
147 | ||
148 | rfkill = container_of(led->trigger, struct rfkill, led_trigger); | |
149 | ||
150 | rfkill_led_trigger_event(rfkill); | |
151 | } | |
152 | ||
19d337df JB |
153 | static int rfkill_led_trigger_register(struct rfkill *rfkill) |
154 | { | |
155 | rfkill->led_trigger.name = rfkill->ledtrigname | |
156 | ? : dev_name(&rfkill->dev); | |
157 | rfkill->led_trigger.activate = rfkill_led_trigger_activate; | |
158 | return led_trigger_register(&rfkill->led_trigger); | |
159 | } | |
160 | ||
161 | static void rfkill_led_trigger_unregister(struct rfkill *rfkill) | |
162 | { | |
163 | led_trigger_unregister(&rfkill->led_trigger); | |
164 | } | |
165 | #else | |
166 | static void rfkill_led_trigger_event(struct rfkill *rfkill) | |
167 | { | |
168 | } | |
169 | ||
170 | static inline int rfkill_led_trigger_register(struct rfkill *rfkill) | |
171 | { | |
172 | return 0; | |
173 | } | |
174 | ||
175 | static inline void rfkill_led_trigger_unregister(struct rfkill *rfkill) | |
176 | { | |
177 | } | |
178 | #endif /* CONFIG_RFKILL_LEDS */ | |
179 | ||
c64fb016 JB |
180 | static void rfkill_fill_event(struct rfkill_event *ev, struct rfkill *rfkill, |
181 | enum rfkill_operation op) | |
182 | { | |
183 | unsigned long flags; | |
184 | ||
185 | ev->idx = rfkill->idx; | |
186 | ev->type = rfkill->type; | |
187 | ev->op = op; | |
188 | ||
189 | spin_lock_irqsave(&rfkill->lock, flags); | |
190 | ev->hard = !!(rfkill->state & RFKILL_BLOCK_HW); | |
191 | ev->soft = !!(rfkill->state & (RFKILL_BLOCK_SW | | |
192 | RFKILL_BLOCK_SW_PREV)); | |
193 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
194 | } | |
195 | ||
196 | static void rfkill_send_events(struct rfkill *rfkill, enum rfkill_operation op) | |
197 | { | |
198 | struct rfkill_data *data; | |
199 | struct rfkill_int_event *ev; | |
200 | ||
201 | list_for_each_entry(data, &rfkill_fds, list) { | |
202 | ev = kzalloc(sizeof(*ev), GFP_KERNEL); | |
203 | if (!ev) | |
204 | continue; | |
205 | rfkill_fill_event(&ev->ev, rfkill, op); | |
206 | mutex_lock(&data->mtx); | |
207 | list_add_tail(&ev->list, &data->events); | |
208 | mutex_unlock(&data->mtx); | |
209 | wake_up_interruptible(&data->read_wait); | |
210 | } | |
211 | } | |
212 | ||
213 | static void rfkill_event(struct rfkill *rfkill) | |
19d337df | 214 | { |
06d5caf4 | 215 | if (!rfkill->registered) |
19d337df JB |
216 | return; |
217 | ||
218 | kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE); | |
c64fb016 JB |
219 | |
220 | /* also send event to /dev/rfkill */ | |
221 | rfkill_send_events(rfkill, RFKILL_OP_CHANGE); | |
19d337df JB |
222 | } |
223 | ||
224 | static bool __rfkill_set_hw_state(struct rfkill *rfkill, | |
225 | bool blocked, bool *change) | |
226 | { | |
227 | unsigned long flags; | |
228 | bool prev, any; | |
229 | ||
230 | BUG_ON(!rfkill); | |
231 | ||
232 | spin_lock_irqsave(&rfkill->lock, flags); | |
233 | prev = !!(rfkill->state & RFKILL_BLOCK_HW); | |
234 | if (blocked) | |
235 | rfkill->state |= RFKILL_BLOCK_HW; | |
236 | else | |
237 | rfkill->state &= ~RFKILL_BLOCK_HW; | |
238 | *change = prev != blocked; | |
6be19ccd | 239 | any = !!(rfkill->state & RFKILL_BLOCK_ANY); |
19d337df JB |
240 | spin_unlock_irqrestore(&rfkill->lock, flags); |
241 | ||
242 | rfkill_led_trigger_event(rfkill); | |
243 | ||
244 | return any; | |
245 | } | |
246 | ||
247 | /** | |
248 | * rfkill_set_block - wrapper for set_block method | |
249 | * | |
250 | * @rfkill: the rfkill struct to use | |
251 | * @blocked: the new software state | |
252 | * | |
253 | * Calls the set_block method (when applicable) and handles notifications | |
254 | * etc. as well. | |
255 | */ | |
256 | static void rfkill_set_block(struct rfkill *rfkill, bool blocked) | |
257 | { | |
258 | unsigned long flags; | |
259 | int err; | |
260 | ||
7fa20a7f AJ |
261 | if (unlikely(rfkill->dev.power.power_state.event & PM_EVENT_SLEEP)) |
262 | return; | |
263 | ||
19d337df JB |
264 | /* |
265 | * Some platforms (...!) generate input events which affect the | |
266 | * _hard_ kill state -- whenever something tries to change the | |
267 | * current software state query the hardware state too. | |
268 | */ | |
269 | if (rfkill->ops->query) | |
270 | rfkill->ops->query(rfkill, rfkill->data); | |
271 | ||
272 | spin_lock_irqsave(&rfkill->lock, flags); | |
273 | if (rfkill->state & RFKILL_BLOCK_SW) | |
274 | rfkill->state |= RFKILL_BLOCK_SW_PREV; | |
275 | else | |
276 | rfkill->state &= ~RFKILL_BLOCK_SW_PREV; | |
277 | ||
278 | if (blocked) | |
279 | rfkill->state |= RFKILL_BLOCK_SW; | |
280 | else | |
281 | rfkill->state &= ~RFKILL_BLOCK_SW; | |
282 | ||
283 | rfkill->state |= RFKILL_BLOCK_SW_SETCALL; | |
284 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
285 | ||
19d337df JB |
286 | err = rfkill->ops->set_block(rfkill->data, blocked); |
287 | ||
288 | spin_lock_irqsave(&rfkill->lock, flags); | |
289 | if (err) { | |
290 | /* | |
291 | * Failed -- reset status to _prev, this may be different | |
292 | * from what set set _PREV to earlier in this function | |
293 | * if rfkill_set_sw_state was invoked. | |
294 | */ | |
295 | if (rfkill->state & RFKILL_BLOCK_SW_PREV) | |
296 | rfkill->state |= RFKILL_BLOCK_SW; | |
297 | else | |
298 | rfkill->state &= ~RFKILL_BLOCK_SW; | |
299 | } | |
300 | rfkill->state &= ~RFKILL_BLOCK_SW_SETCALL; | |
301 | rfkill->state &= ~RFKILL_BLOCK_SW_PREV; | |
302 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
303 | ||
304 | rfkill_led_trigger_event(rfkill); | |
c64fb016 | 305 | rfkill_event(rfkill); |
19d337df JB |
306 | } |
307 | ||
c64fb016 JB |
308 | #ifdef CONFIG_RFKILL_INPUT |
309 | static atomic_t rfkill_input_disabled = ATOMIC_INIT(0); | |
310 | ||
19d337df JB |
311 | /** |
312 | * __rfkill_switch_all - Toggle state of all switches of given type | |
313 | * @type: type of interfaces to be affected | |
314 | * @state: the new state | |
315 | * | |
316 | * This function sets the state of all switches of given type, | |
317 | * unless a specific switch is claimed by userspace (in which case, | |
318 | * that switch is left alone) or suspended. | |
319 | * | |
320 | * Caller must have acquired rfkill_global_mutex. | |
321 | */ | |
322 | static void __rfkill_switch_all(const enum rfkill_type type, bool blocked) | |
323 | { | |
324 | struct rfkill *rfkill; | |
325 | ||
326 | rfkill_global_states[type].cur = blocked; | |
327 | list_for_each_entry(rfkill, &rfkill_list, node) { | |
27e49ca9 | 328 | if (rfkill->type != type && type != RFKILL_TYPE_ALL) |
19d337df JB |
329 | continue; |
330 | ||
331 | rfkill_set_block(rfkill, blocked); | |
332 | } | |
333 | } | |
334 | ||
335 | /** | |
336 | * rfkill_switch_all - Toggle state of all switches of given type | |
337 | * @type: type of interfaces to be affected | |
338 | * @state: the new state | |
339 | * | |
340 | * Acquires rfkill_global_mutex and calls __rfkill_switch_all(@type, @state). | |
341 | * Please refer to __rfkill_switch_all() for details. | |
342 | * | |
343 | * Does nothing if the EPO lock is active. | |
344 | */ | |
345 | void rfkill_switch_all(enum rfkill_type type, bool blocked) | |
346 | { | |
c64fb016 JB |
347 | if (atomic_read(&rfkill_input_disabled)) |
348 | return; | |
349 | ||
19d337df JB |
350 | mutex_lock(&rfkill_global_mutex); |
351 | ||
352 | if (!rfkill_epo_lock_active) | |
353 | __rfkill_switch_all(type, blocked); | |
354 | ||
355 | mutex_unlock(&rfkill_global_mutex); | |
356 | } | |
357 | ||
358 | /** | |
359 | * rfkill_epo - emergency power off all transmitters | |
360 | * | |
361 | * This kicks all non-suspended rfkill devices to RFKILL_STATE_SOFT_BLOCKED, | |
362 | * ignoring everything in its path but rfkill_global_mutex and rfkill->mutex. | |
363 | * | |
364 | * The global state before the EPO is saved and can be restored later | |
365 | * using rfkill_restore_states(). | |
366 | */ | |
367 | void rfkill_epo(void) | |
368 | { | |
369 | struct rfkill *rfkill; | |
370 | int i; | |
371 | ||
c64fb016 JB |
372 | if (atomic_read(&rfkill_input_disabled)) |
373 | return; | |
374 | ||
19d337df JB |
375 | mutex_lock(&rfkill_global_mutex); |
376 | ||
377 | rfkill_epo_lock_active = true; | |
378 | list_for_each_entry(rfkill, &rfkill_list, node) | |
379 | rfkill_set_block(rfkill, true); | |
380 | ||
381 | for (i = 0; i < NUM_RFKILL_TYPES; i++) { | |
b3fa1329 | 382 | rfkill_global_states[i].sav = rfkill_global_states[i].cur; |
19d337df JB |
383 | rfkill_global_states[i].cur = true; |
384 | } | |
c64fb016 | 385 | |
19d337df JB |
386 | mutex_unlock(&rfkill_global_mutex); |
387 | } | |
388 | ||
389 | /** | |
390 | * rfkill_restore_states - restore global states | |
391 | * | |
392 | * Restore (and sync switches to) the global state from the | |
393 | * states in rfkill_default_states. This can undo the effects of | |
394 | * a call to rfkill_epo(). | |
395 | */ | |
396 | void rfkill_restore_states(void) | |
397 | { | |
398 | int i; | |
399 | ||
c64fb016 JB |
400 | if (atomic_read(&rfkill_input_disabled)) |
401 | return; | |
402 | ||
19d337df JB |
403 | mutex_lock(&rfkill_global_mutex); |
404 | ||
405 | rfkill_epo_lock_active = false; | |
406 | for (i = 0; i < NUM_RFKILL_TYPES; i++) | |
b3fa1329 | 407 | __rfkill_switch_all(i, rfkill_global_states[i].sav); |
19d337df JB |
408 | mutex_unlock(&rfkill_global_mutex); |
409 | } | |
410 | ||
411 | /** | |
412 | * rfkill_remove_epo_lock - unlock state changes | |
413 | * | |
414 | * Used by rfkill-input manually unlock state changes, when | |
415 | * the EPO switch is deactivated. | |
416 | */ | |
417 | void rfkill_remove_epo_lock(void) | |
418 | { | |
c64fb016 JB |
419 | if (atomic_read(&rfkill_input_disabled)) |
420 | return; | |
421 | ||
19d337df JB |
422 | mutex_lock(&rfkill_global_mutex); |
423 | rfkill_epo_lock_active = false; | |
424 | mutex_unlock(&rfkill_global_mutex); | |
425 | } | |
426 | ||
427 | /** | |
428 | * rfkill_is_epo_lock_active - returns true EPO is active | |
429 | * | |
430 | * Returns 0 (false) if there is NOT an active EPO contidion, | |
431 | * and 1 (true) if there is an active EPO contition, which | |
432 | * locks all radios in one of the BLOCKED states. | |
433 | * | |
434 | * Can be called in atomic context. | |
435 | */ | |
436 | bool rfkill_is_epo_lock_active(void) | |
437 | { | |
438 | return rfkill_epo_lock_active; | |
439 | } | |
440 | ||
441 | /** | |
442 | * rfkill_get_global_sw_state - returns global state for a type | |
443 | * @type: the type to get the global state of | |
444 | * | |
445 | * Returns the current global state for a given wireless | |
446 | * device type. | |
447 | */ | |
448 | bool rfkill_get_global_sw_state(const enum rfkill_type type) | |
449 | { | |
450 | return rfkill_global_states[type].cur; | |
451 | } | |
c64fb016 | 452 | #endif |
19d337df | 453 | |
19d337df JB |
454 | |
455 | bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked) | |
456 | { | |
457 | bool ret, change; | |
458 | ||
459 | ret = __rfkill_set_hw_state(rfkill, blocked, &change); | |
460 | ||
461 | if (!rfkill->registered) | |
462 | return ret; | |
463 | ||
464 | if (change) | |
465 | schedule_work(&rfkill->uevent_work); | |
466 | ||
467 | return ret; | |
468 | } | |
469 | EXPORT_SYMBOL(rfkill_set_hw_state); | |
470 | ||
471 | static void __rfkill_set_sw_state(struct rfkill *rfkill, bool blocked) | |
472 | { | |
473 | u32 bit = RFKILL_BLOCK_SW; | |
474 | ||
475 | /* if in a ops->set_block right now, use other bit */ | |
476 | if (rfkill->state & RFKILL_BLOCK_SW_SETCALL) | |
477 | bit = RFKILL_BLOCK_SW_PREV; | |
478 | ||
479 | if (blocked) | |
480 | rfkill->state |= bit; | |
481 | else | |
482 | rfkill->state &= ~bit; | |
483 | } | |
484 | ||
485 | bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked) | |
486 | { | |
487 | unsigned long flags; | |
488 | bool prev, hwblock; | |
489 | ||
490 | BUG_ON(!rfkill); | |
491 | ||
492 | spin_lock_irqsave(&rfkill->lock, flags); | |
493 | prev = !!(rfkill->state & RFKILL_BLOCK_SW); | |
494 | __rfkill_set_sw_state(rfkill, blocked); | |
495 | hwblock = !!(rfkill->state & RFKILL_BLOCK_HW); | |
496 | blocked = blocked || hwblock; | |
497 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
498 | ||
06d5caf4 AJ |
499 | if (!rfkill->registered) |
500 | return blocked; | |
19d337df | 501 | |
06d5caf4 AJ |
502 | if (prev != blocked && !hwblock) |
503 | schedule_work(&rfkill->uevent_work); | |
504 | ||
505 | rfkill_led_trigger_event(rfkill); | |
19d337df JB |
506 | |
507 | return blocked; | |
508 | } | |
509 | EXPORT_SYMBOL(rfkill_set_sw_state); | |
510 | ||
06d5caf4 AJ |
511 | void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked) |
512 | { | |
513 | unsigned long flags; | |
514 | ||
515 | BUG_ON(!rfkill); | |
516 | BUG_ON(rfkill->registered); | |
517 | ||
518 | spin_lock_irqsave(&rfkill->lock, flags); | |
519 | __rfkill_set_sw_state(rfkill, blocked); | |
520 | rfkill->persistent = true; | |
521 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
522 | } | |
523 | EXPORT_SYMBOL(rfkill_init_sw_state); | |
524 | ||
19d337df JB |
525 | void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw) |
526 | { | |
527 | unsigned long flags; | |
528 | bool swprev, hwprev; | |
529 | ||
530 | BUG_ON(!rfkill); | |
531 | ||
532 | spin_lock_irqsave(&rfkill->lock, flags); | |
533 | ||
534 | /* | |
535 | * No need to care about prev/setblock ... this is for uevent only | |
536 | * and that will get triggered by rfkill_set_block anyway. | |
537 | */ | |
538 | swprev = !!(rfkill->state & RFKILL_BLOCK_SW); | |
539 | hwprev = !!(rfkill->state & RFKILL_BLOCK_HW); | |
540 | __rfkill_set_sw_state(rfkill, sw); | |
48ab3578 AJ |
541 | if (hw) |
542 | rfkill->state |= RFKILL_BLOCK_HW; | |
543 | else | |
544 | rfkill->state &= ~RFKILL_BLOCK_HW; | |
19d337df JB |
545 | |
546 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
547 | ||
b3fa1329 AJ |
548 | if (!rfkill->registered) { |
549 | rfkill->persistent = true; | |
550 | } else { | |
551 | if (swprev != sw || hwprev != hw) | |
552 | schedule_work(&rfkill->uevent_work); | |
19d337df | 553 | |
b3fa1329 AJ |
554 | rfkill_led_trigger_event(rfkill); |
555 | } | |
19d337df JB |
556 | } |
557 | EXPORT_SYMBOL(rfkill_set_states); | |
558 | ||
559 | static ssize_t rfkill_name_show(struct device *dev, | |
560 | struct device_attribute *attr, | |
561 | char *buf) | |
562 | { | |
563 | struct rfkill *rfkill = to_rfkill(dev); | |
564 | ||
565 | return sprintf(buf, "%s\n", rfkill->name); | |
566 | } | |
567 | ||
568 | static const char *rfkill_get_type_str(enum rfkill_type type) | |
569 | { | |
02f7f179 AM |
570 | BUILD_BUG_ON(NUM_RFKILL_TYPES != RFKILL_TYPE_FM + 1); |
571 | ||
19d337df JB |
572 | switch (type) { |
573 | case RFKILL_TYPE_WLAN: | |
574 | return "wlan"; | |
575 | case RFKILL_TYPE_BLUETOOTH: | |
576 | return "bluetooth"; | |
577 | case RFKILL_TYPE_UWB: | |
578 | return "ultrawideband"; | |
579 | case RFKILL_TYPE_WIMAX: | |
580 | return "wimax"; | |
581 | case RFKILL_TYPE_WWAN: | |
582 | return "wwan"; | |
3ad20149 TW |
583 | case RFKILL_TYPE_GPS: |
584 | return "gps"; | |
875405a7 MH |
585 | case RFKILL_TYPE_FM: |
586 | return "fm"; | |
19d337df JB |
587 | default: |
588 | BUG(); | |
589 | } | |
19d337df JB |
590 | } |
591 | ||
592 | static ssize_t rfkill_type_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, "%s\n", rfkill_get_type_str(rfkill->type)); | |
599 | } | |
600 | ||
c64fb016 JB |
601 | static ssize_t rfkill_idx_show(struct device *dev, |
602 | struct device_attribute *attr, | |
603 | char *buf) | |
604 | { | |
605 | struct rfkill *rfkill = to_rfkill(dev); | |
606 | ||
607 | return sprintf(buf, "%d\n", rfkill->idx); | |
608 | } | |
609 | ||
464902e8 AJ |
610 | static ssize_t rfkill_persistent_show(struct device *dev, |
611 | struct device_attribute *attr, | |
612 | char *buf) | |
613 | { | |
614 | struct rfkill *rfkill = to_rfkill(dev); | |
615 | ||
616 | return sprintf(buf, "%d\n", rfkill->persistent); | |
617 | } | |
618 | ||
819bfecc | 619 | static ssize_t rfkill_hard_show(struct device *dev, |
6c26361e | 620 | struct device_attribute *attr, |
621 | char *buf) | |
622 | { | |
623 | struct rfkill *rfkill = to_rfkill(dev); | |
6c26361e | 624 | |
819bfecc | 625 | return sprintf(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_HW) ? 1 : 0 ); |
6c26361e | 626 | } |
627 | ||
819bfecc | 628 | static ssize_t rfkill_soft_show(struct device *dev, |
6c26361e | 629 | struct device_attribute *attr, |
630 | char *buf) | |
631 | { | |
632 | struct rfkill *rfkill = to_rfkill(dev); | |
6c26361e | 633 | |
819bfecc | 634 | return sprintf(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_SW) ? 1 : 0 ); |
6c26361e | 635 | } |
636 | ||
819bfecc | 637 | static ssize_t rfkill_soft_store(struct device *dev, |
6c26361e | 638 | struct device_attribute *attr, |
639 | const char *buf, size_t count) | |
640 | { | |
641 | struct rfkill *rfkill = to_rfkill(dev); | |
642 | unsigned long state; | |
643 | int err; | |
644 | ||
645 | if (!capable(CAP_NET_ADMIN)) | |
646 | return -EPERM; | |
647 | ||
1bac92ca | 648 | err = kstrtoul(buf, 0, &state); |
6c26361e | 649 | if (err) |
650 | return err; | |
651 | ||
652 | if (state > 1 ) | |
653 | return -EINVAL; | |
654 | ||
655 | mutex_lock(&rfkill_global_mutex); | |
656 | rfkill_set_block(rfkill, state); | |
657 | mutex_unlock(&rfkill_global_mutex); | |
658 | ||
659 | return err ?: count; | |
660 | } | |
661 | ||
19d337df JB |
662 | static u8 user_state_from_blocked(unsigned long state) |
663 | { | |
664 | if (state & RFKILL_BLOCK_HW) | |
665 | return RFKILL_USER_STATE_HARD_BLOCKED; | |
666 | if (state & RFKILL_BLOCK_SW) | |
667 | return RFKILL_USER_STATE_SOFT_BLOCKED; | |
668 | ||
669 | return RFKILL_USER_STATE_UNBLOCKED; | |
670 | } | |
671 | ||
672 | static ssize_t rfkill_state_show(struct device *dev, | |
673 | struct device_attribute *attr, | |
674 | char *buf) | |
675 | { | |
676 | struct rfkill *rfkill = to_rfkill(dev); | |
19d337df | 677 | |
819bfecc | 678 | return sprintf(buf, "%d\n", user_state_from_blocked(rfkill->state)); |
19d337df JB |
679 | } |
680 | ||
681 | static ssize_t rfkill_state_store(struct device *dev, | |
682 | struct device_attribute *attr, | |
683 | const char *buf, size_t count) | |
684 | { | |
f54c1427 JB |
685 | struct rfkill *rfkill = to_rfkill(dev); |
686 | unsigned long state; | |
687 | int err; | |
688 | ||
689 | if (!capable(CAP_NET_ADMIN)) | |
690 | return -EPERM; | |
691 | ||
1bac92ca | 692 | err = kstrtoul(buf, 0, &state); |
f54c1427 JB |
693 | if (err) |
694 | return err; | |
695 | ||
696 | if (state != RFKILL_USER_STATE_SOFT_BLOCKED && | |
697 | state != RFKILL_USER_STATE_UNBLOCKED) | |
698 | return -EINVAL; | |
699 | ||
700 | mutex_lock(&rfkill_global_mutex); | |
701 | rfkill_set_block(rfkill, state == RFKILL_USER_STATE_SOFT_BLOCKED); | |
702 | mutex_unlock(&rfkill_global_mutex); | |
19d337df | 703 | |
f54c1427 | 704 | return err ?: count; |
19d337df JB |
705 | } |
706 | ||
707 | static ssize_t rfkill_claim_show(struct device *dev, | |
708 | struct device_attribute *attr, | |
709 | char *buf) | |
710 | { | |
711 | return sprintf(buf, "%d\n", 0); | |
712 | } | |
713 | ||
714 | static ssize_t rfkill_claim_store(struct device *dev, | |
715 | struct device_attribute *attr, | |
716 | const char *buf, size_t count) | |
717 | { | |
718 | return -EOPNOTSUPP; | |
719 | } | |
720 | ||
721 | static struct device_attribute rfkill_dev_attrs[] = { | |
722 | __ATTR(name, S_IRUGO, rfkill_name_show, NULL), | |
723 | __ATTR(type, S_IRUGO, rfkill_type_show, NULL), | |
c64fb016 | 724 | __ATTR(index, S_IRUGO, rfkill_idx_show, NULL), |
464902e8 | 725 | __ATTR(persistent, S_IRUGO, rfkill_persistent_show, NULL), |
19d337df JB |
726 | __ATTR(state, S_IRUGO|S_IWUSR, rfkill_state_show, rfkill_state_store), |
727 | __ATTR(claim, S_IRUGO|S_IWUSR, rfkill_claim_show, rfkill_claim_store), | |
819bfecc | 728 | __ATTR(soft, S_IRUGO|S_IWUSR, rfkill_soft_show, rfkill_soft_store), |
729 | __ATTR(hard, S_IRUGO, rfkill_hard_show, NULL), | |
19d337df JB |
730 | __ATTR_NULL |
731 | }; | |
732 | ||
733 | static void rfkill_release(struct device *dev) | |
734 | { | |
735 | struct rfkill *rfkill = to_rfkill(dev); | |
736 | ||
737 | kfree(rfkill); | |
738 | } | |
739 | ||
740 | static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env) | |
741 | { | |
742 | struct rfkill *rfkill = to_rfkill(dev); | |
743 | unsigned long flags; | |
744 | u32 state; | |
745 | int error; | |
746 | ||
747 | error = add_uevent_var(env, "RFKILL_NAME=%s", rfkill->name); | |
748 | if (error) | |
749 | return error; | |
750 | error = add_uevent_var(env, "RFKILL_TYPE=%s", | |
751 | rfkill_get_type_str(rfkill->type)); | |
752 | if (error) | |
753 | return error; | |
754 | spin_lock_irqsave(&rfkill->lock, flags); | |
755 | state = rfkill->state; | |
756 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
757 | error = add_uevent_var(env, "RFKILL_STATE=%d", | |
758 | user_state_from_blocked(state)); | |
759 | return error; | |
760 | } | |
761 | ||
762 | void rfkill_pause_polling(struct rfkill *rfkill) | |
763 | { | |
764 | BUG_ON(!rfkill); | |
765 | ||
766 | if (!rfkill->ops->poll) | |
767 | return; | |
768 | ||
769 | cancel_delayed_work_sync(&rfkill->poll_work); | |
770 | } | |
771 | EXPORT_SYMBOL(rfkill_pause_polling); | |
772 | ||
773 | void rfkill_resume_polling(struct rfkill *rfkill) | |
774 | { | |
775 | BUG_ON(!rfkill); | |
776 | ||
777 | if (!rfkill->ops->poll) | |
778 | return; | |
779 | ||
780 | schedule_work(&rfkill->poll_work.work); | |
781 | } | |
782 | EXPORT_SYMBOL(rfkill_resume_polling); | |
783 | ||
784 | static int rfkill_suspend(struct device *dev, pm_message_t state) | |
785 | { | |
786 | struct rfkill *rfkill = to_rfkill(dev); | |
787 | ||
788 | rfkill_pause_polling(rfkill); | |
789 | ||
19d337df JB |
790 | return 0; |
791 | } | |
792 | ||
793 | static int rfkill_resume(struct device *dev) | |
794 | { | |
795 | struct rfkill *rfkill = to_rfkill(dev); | |
796 | bool cur; | |
797 | ||
06d5caf4 AJ |
798 | if (!rfkill->persistent) { |
799 | cur = !!(rfkill->state & RFKILL_BLOCK_SW); | |
800 | rfkill_set_block(rfkill, cur); | |
801 | } | |
19d337df | 802 | |
19d337df JB |
803 | rfkill_resume_polling(rfkill); |
804 | ||
805 | return 0; | |
806 | } | |
807 | ||
808 | static struct class rfkill_class = { | |
809 | .name = "rfkill", | |
810 | .dev_release = rfkill_release, | |
811 | .dev_attrs = rfkill_dev_attrs, | |
812 | .dev_uevent = rfkill_dev_uevent, | |
813 | .suspend = rfkill_suspend, | |
814 | .resume = rfkill_resume, | |
815 | }; | |
816 | ||
6081162e JB |
817 | bool rfkill_blocked(struct rfkill *rfkill) |
818 | { | |
819 | unsigned long flags; | |
820 | u32 state; | |
821 | ||
822 | spin_lock_irqsave(&rfkill->lock, flags); | |
823 | state = rfkill->state; | |
824 | spin_unlock_irqrestore(&rfkill->lock, flags); | |
825 | ||
826 | return !!(state & RFKILL_BLOCK_ANY); | |
827 | } | |
828 | EXPORT_SYMBOL(rfkill_blocked); | |
829 | ||
19d337df JB |
830 | |
831 | struct rfkill * __must_check rfkill_alloc(const char *name, | |
832 | struct device *parent, | |
833 | const enum rfkill_type type, | |
834 | const struct rfkill_ops *ops, | |
835 | void *ops_data) | |
836 | { | |
837 | struct rfkill *rfkill; | |
838 | struct device *dev; | |
839 | ||
840 | if (WARN_ON(!ops)) | |
841 | return NULL; | |
842 | ||
843 | if (WARN_ON(!ops->set_block)) | |
844 | return NULL; | |
845 | ||
846 | if (WARN_ON(!name)) | |
847 | return NULL; | |
848 | ||
c64fb016 | 849 | if (WARN_ON(type == RFKILL_TYPE_ALL || type >= NUM_RFKILL_TYPES)) |
19d337df JB |
850 | return NULL; |
851 | ||
852 | rfkill = kzalloc(sizeof(*rfkill), GFP_KERNEL); | |
853 | if (!rfkill) | |
854 | return NULL; | |
855 | ||
856 | spin_lock_init(&rfkill->lock); | |
857 | INIT_LIST_HEAD(&rfkill->node); | |
858 | rfkill->type = type; | |
859 | rfkill->name = name; | |
860 | rfkill->ops = ops; | |
861 | rfkill->data = ops_data; | |
862 | ||
863 | dev = &rfkill->dev; | |
864 | dev->class = &rfkill_class; | |
865 | dev->parent = parent; | |
866 | device_initialize(dev); | |
867 | ||
868 | return rfkill; | |
869 | } | |
870 | EXPORT_SYMBOL(rfkill_alloc); | |
871 | ||
872 | static void rfkill_poll(struct work_struct *work) | |
873 | { | |
874 | struct rfkill *rfkill; | |
875 | ||
876 | rfkill = container_of(work, struct rfkill, poll_work.work); | |
877 | ||
878 | /* | |
879 | * Poll hardware state -- driver will use one of the | |
880 | * rfkill_set{,_hw,_sw}_state functions and use its | |
881 | * return value to update the current status. | |
882 | */ | |
883 | rfkill->ops->poll(rfkill, rfkill->data); | |
884 | ||
885 | schedule_delayed_work(&rfkill->poll_work, | |
886 | round_jiffies_relative(POLL_INTERVAL)); | |
887 | } | |
888 | ||
889 | static void rfkill_uevent_work(struct work_struct *work) | |
890 | { | |
891 | struct rfkill *rfkill; | |
892 | ||
893 | rfkill = container_of(work, struct rfkill, uevent_work); | |
894 | ||
c64fb016 JB |
895 | mutex_lock(&rfkill_global_mutex); |
896 | rfkill_event(rfkill); | |
897 | mutex_unlock(&rfkill_global_mutex); | |
19d337df JB |
898 | } |
899 | ||
900 | static void rfkill_sync_work(struct work_struct *work) | |
901 | { | |
902 | struct rfkill *rfkill; | |
903 | bool cur; | |
904 | ||
905 | rfkill = container_of(work, struct rfkill, sync_work); | |
906 | ||
907 | mutex_lock(&rfkill_global_mutex); | |
908 | cur = rfkill_global_states[rfkill->type].cur; | |
909 | rfkill_set_block(rfkill, cur); | |
910 | mutex_unlock(&rfkill_global_mutex); | |
911 | } | |
912 | ||
913 | int __must_check rfkill_register(struct rfkill *rfkill) | |
914 | { | |
915 | static unsigned long rfkill_no; | |
916 | struct device *dev = &rfkill->dev; | |
917 | int error; | |
918 | ||
919 | BUG_ON(!rfkill); | |
920 | ||
921 | mutex_lock(&rfkill_global_mutex); | |
922 | ||
923 | if (rfkill->registered) { | |
924 | error = -EALREADY; | |
925 | goto unlock; | |
926 | } | |
927 | ||
c64fb016 | 928 | rfkill->idx = rfkill_no; |
19d337df JB |
929 | dev_set_name(dev, "rfkill%lu", rfkill_no); |
930 | rfkill_no++; | |
931 | ||
19d337df JB |
932 | list_add_tail(&rfkill->node, &rfkill_list); |
933 | ||
934 | error = device_add(dev); | |
935 | if (error) | |
936 | goto remove; | |
937 | ||
938 | error = rfkill_led_trigger_register(rfkill); | |
939 | if (error) | |
940 | goto devdel; | |
941 | ||
942 | rfkill->registered = true; | |
943 | ||
2ec2c68c | 944 | INIT_DELAYED_WORK(&rfkill->poll_work, rfkill_poll); |
19d337df | 945 | INIT_WORK(&rfkill->uevent_work, rfkill_uevent_work); |
19d337df | 946 | INIT_WORK(&rfkill->sync_work, rfkill_sync_work); |
2ec2c68c JB |
947 | |
948 | if (rfkill->ops->poll) | |
949 | schedule_delayed_work(&rfkill->poll_work, | |
950 | round_jiffies_relative(POLL_INTERVAL)); | |
b3fa1329 AJ |
951 | |
952 | if (!rfkill->persistent || rfkill_epo_lock_active) { | |
953 | schedule_work(&rfkill->sync_work); | |
954 | } else { | |
955 | #ifdef CONFIG_RFKILL_INPUT | |
956 | bool soft_blocked = !!(rfkill->state & RFKILL_BLOCK_SW); | |
957 | ||
958 | if (!atomic_read(&rfkill_input_disabled)) | |
959 | __rfkill_switch_all(rfkill->type, soft_blocked); | |
960 | #endif | |
961 | } | |
2ec2c68c | 962 | |
c64fb016 | 963 | rfkill_send_events(rfkill, RFKILL_OP_ADD); |
19d337df JB |
964 | |
965 | mutex_unlock(&rfkill_global_mutex); | |
966 | return 0; | |
967 | ||
968 | devdel: | |
969 | device_del(&rfkill->dev); | |
970 | remove: | |
971 | list_del_init(&rfkill->node); | |
972 | unlock: | |
973 | mutex_unlock(&rfkill_global_mutex); | |
974 | return error; | |
975 | } | |
976 | EXPORT_SYMBOL(rfkill_register); | |
977 | ||
978 | void rfkill_unregister(struct rfkill *rfkill) | |
979 | { | |
980 | BUG_ON(!rfkill); | |
981 | ||
982 | if (rfkill->ops->poll) | |
983 | cancel_delayed_work_sync(&rfkill->poll_work); | |
984 | ||
985 | cancel_work_sync(&rfkill->uevent_work); | |
986 | cancel_work_sync(&rfkill->sync_work); | |
987 | ||
988 | rfkill->registered = false; | |
989 | ||
990 | device_del(&rfkill->dev); | |
991 | ||
992 | mutex_lock(&rfkill_global_mutex); | |
c64fb016 | 993 | rfkill_send_events(rfkill, RFKILL_OP_DEL); |
19d337df JB |
994 | list_del_init(&rfkill->node); |
995 | mutex_unlock(&rfkill_global_mutex); | |
996 | ||
997 | rfkill_led_trigger_unregister(rfkill); | |
998 | } | |
999 | EXPORT_SYMBOL(rfkill_unregister); | |
1000 | ||
1001 | void rfkill_destroy(struct rfkill *rfkill) | |
1002 | { | |
1003 | if (rfkill) | |
1004 | put_device(&rfkill->dev); | |
1005 | } | |
1006 | EXPORT_SYMBOL(rfkill_destroy); | |
1007 | ||
c64fb016 JB |
1008 | static int rfkill_fop_open(struct inode *inode, struct file *file) |
1009 | { | |
1010 | struct rfkill_data *data; | |
1011 | struct rfkill *rfkill; | |
1012 | struct rfkill_int_event *ev, *tmp; | |
1013 | ||
1014 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1015 | if (!data) | |
1016 | return -ENOMEM; | |
1017 | ||
1018 | INIT_LIST_HEAD(&data->events); | |
1019 | mutex_init(&data->mtx); | |
1020 | init_waitqueue_head(&data->read_wait); | |
1021 | ||
1022 | mutex_lock(&rfkill_global_mutex); | |
1023 | mutex_lock(&data->mtx); | |
1024 | /* | |
1025 | * start getting events from elsewhere but hold mtx to get | |
1026 | * startup events added first | |
1027 | */ | |
c64fb016 JB |
1028 | |
1029 | list_for_each_entry(rfkill, &rfkill_list, node) { | |
1030 | ev = kzalloc(sizeof(*ev), GFP_KERNEL); | |
1031 | if (!ev) | |
1032 | goto free; | |
1033 | rfkill_fill_event(&ev->ev, rfkill, RFKILL_OP_ADD); | |
1034 | list_add_tail(&ev->list, &data->events); | |
1035 | } | |
bd2281b8 | 1036 | list_add(&data->list, &rfkill_fds); |
c64fb016 JB |
1037 | mutex_unlock(&data->mtx); |
1038 | mutex_unlock(&rfkill_global_mutex); | |
1039 | ||
1040 | file->private_data = data; | |
1041 | ||
1042 | return nonseekable_open(inode, file); | |
1043 | ||
1044 | free: | |
1045 | mutex_unlock(&data->mtx); | |
1046 | mutex_unlock(&rfkill_global_mutex); | |
1047 | mutex_destroy(&data->mtx); | |
1048 | list_for_each_entry_safe(ev, tmp, &data->events, list) | |
1049 | kfree(ev); | |
1050 | kfree(data); | |
1051 | return -ENOMEM; | |
1052 | } | |
1053 | ||
1054 | static unsigned int rfkill_fop_poll(struct file *file, poll_table *wait) | |
1055 | { | |
1056 | struct rfkill_data *data = file->private_data; | |
1057 | unsigned int res = POLLOUT | POLLWRNORM; | |
1058 | ||
1059 | poll_wait(file, &data->read_wait, wait); | |
1060 | ||
1061 | mutex_lock(&data->mtx); | |
1062 | if (!list_empty(&data->events)) | |
1063 | res = POLLIN | POLLRDNORM; | |
1064 | mutex_unlock(&data->mtx); | |
1065 | ||
1066 | return res; | |
1067 | } | |
1068 | ||
1069 | static bool rfkill_readable(struct rfkill_data *data) | |
1070 | { | |
1071 | bool r; | |
1072 | ||
1073 | mutex_lock(&data->mtx); | |
1074 | r = !list_empty(&data->events); | |
1075 | mutex_unlock(&data->mtx); | |
1076 | ||
1077 | return r; | |
1078 | } | |
1079 | ||
1080 | static ssize_t rfkill_fop_read(struct file *file, char __user *buf, | |
1081 | size_t count, loff_t *pos) | |
1082 | { | |
1083 | struct rfkill_data *data = file->private_data; | |
1084 | struct rfkill_int_event *ev; | |
1085 | unsigned long sz; | |
1086 | int ret; | |
1087 | ||
1088 | mutex_lock(&data->mtx); | |
1089 | ||
1090 | while (list_empty(&data->events)) { | |
1091 | if (file->f_flags & O_NONBLOCK) { | |
1092 | ret = -EAGAIN; | |
1093 | goto out; | |
1094 | } | |
1095 | mutex_unlock(&data->mtx); | |
1096 | ret = wait_event_interruptible(data->read_wait, | |
1097 | rfkill_readable(data)); | |
1098 | mutex_lock(&data->mtx); | |
1099 | ||
1100 | if (ret) | |
1101 | goto out; | |
1102 | } | |
1103 | ||
1104 | ev = list_first_entry(&data->events, struct rfkill_int_event, | |
1105 | list); | |
1106 | ||
1107 | sz = min_t(unsigned long, sizeof(ev->ev), count); | |
1108 | ret = sz; | |
1109 | if (copy_to_user(buf, &ev->ev, sz)) | |
1110 | ret = -EFAULT; | |
1111 | ||
1112 | list_del(&ev->list); | |
1113 | kfree(ev); | |
1114 | out: | |
1115 | mutex_unlock(&data->mtx); | |
1116 | return ret; | |
1117 | } | |
1118 | ||
1119 | static ssize_t rfkill_fop_write(struct file *file, const char __user *buf, | |
1120 | size_t count, loff_t *pos) | |
1121 | { | |
1122 | struct rfkill *rfkill; | |
1123 | struct rfkill_event ev; | |
1124 | ||
1125 | /* we don't need the 'hard' variable but accept it */ | |
1be491fc | 1126 | if (count < RFKILL_EVENT_SIZE_V1 - 1) |
c64fb016 JB |
1127 | return -EINVAL; |
1128 | ||
1be491fc JB |
1129 | /* |
1130 | * Copy as much data as we can accept into our 'ev' buffer, | |
1131 | * but tell userspace how much we've copied so it can determine | |
1132 | * our API version even in a write() call, if it cares. | |
1133 | */ | |
1134 | count = min(count, sizeof(ev)); | |
1135 | if (copy_from_user(&ev, buf, count)) | |
c64fb016 JB |
1136 | return -EFAULT; |
1137 | ||
1138 | if (ev.op != RFKILL_OP_CHANGE && ev.op != RFKILL_OP_CHANGE_ALL) | |
1139 | return -EINVAL; | |
1140 | ||
1141 | if (ev.type >= NUM_RFKILL_TYPES) | |
1142 | return -EINVAL; | |
1143 | ||
1144 | mutex_lock(&rfkill_global_mutex); | |
1145 | ||
1146 | if (ev.op == RFKILL_OP_CHANGE_ALL) { | |
1147 | if (ev.type == RFKILL_TYPE_ALL) { | |
1148 | enum rfkill_type i; | |
1149 | for (i = 0; i < NUM_RFKILL_TYPES; i++) | |
1150 | rfkill_global_states[i].cur = ev.soft; | |
1151 | } else { | |
1152 | rfkill_global_states[ev.type].cur = ev.soft; | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | list_for_each_entry(rfkill, &rfkill_list, node) { | |
1157 | if (rfkill->idx != ev.idx && ev.op != RFKILL_OP_CHANGE_ALL) | |
1158 | continue; | |
1159 | ||
1160 | if (rfkill->type != ev.type && ev.type != RFKILL_TYPE_ALL) | |
1161 | continue; | |
1162 | ||
1163 | rfkill_set_block(rfkill, ev.soft); | |
1164 | } | |
1165 | mutex_unlock(&rfkill_global_mutex); | |
1166 | ||
1167 | return count; | |
1168 | } | |
1169 | ||
1170 | static int rfkill_fop_release(struct inode *inode, struct file *file) | |
1171 | { | |
1172 | struct rfkill_data *data = file->private_data; | |
1173 | struct rfkill_int_event *ev, *tmp; | |
1174 | ||
1175 | mutex_lock(&rfkill_global_mutex); | |
1176 | list_del(&data->list); | |
1177 | mutex_unlock(&rfkill_global_mutex); | |
1178 | ||
1179 | mutex_destroy(&data->mtx); | |
1180 | list_for_each_entry_safe(ev, tmp, &data->events, list) | |
1181 | kfree(ev); | |
1182 | ||
1183 | #ifdef CONFIG_RFKILL_INPUT | |
1184 | if (data->input_handler) | |
207ee162 JB |
1185 | if (atomic_dec_return(&rfkill_input_disabled) == 0) |
1186 | printk(KERN_DEBUG "rfkill: input handler enabled\n"); | |
c64fb016 JB |
1187 | #endif |
1188 | ||
1189 | kfree(data); | |
1190 | ||
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | #ifdef CONFIG_RFKILL_INPUT | |
1195 | static long rfkill_fop_ioctl(struct file *file, unsigned int cmd, | |
1196 | unsigned long arg) | |
1197 | { | |
1198 | struct rfkill_data *data = file->private_data; | |
1199 | ||
1200 | if (_IOC_TYPE(cmd) != RFKILL_IOC_MAGIC) | |
1201 | return -ENOSYS; | |
1202 | ||
1203 | if (_IOC_NR(cmd) != RFKILL_IOC_NOINPUT) | |
1204 | return -ENOSYS; | |
1205 | ||
1206 | mutex_lock(&data->mtx); | |
1207 | ||
1208 | if (!data->input_handler) { | |
207ee162 JB |
1209 | if (atomic_inc_return(&rfkill_input_disabled) == 1) |
1210 | printk(KERN_DEBUG "rfkill: input handler disabled\n"); | |
c64fb016 JB |
1211 | data->input_handler = true; |
1212 | } | |
1213 | ||
1214 | mutex_unlock(&data->mtx); | |
1215 | ||
1216 | return 0; | |
1217 | } | |
1218 | #endif | |
1219 | ||
1220 | static const struct file_operations rfkill_fops = { | |
45ba564d | 1221 | .owner = THIS_MODULE, |
c64fb016 JB |
1222 | .open = rfkill_fop_open, |
1223 | .read = rfkill_fop_read, | |
1224 | .write = rfkill_fop_write, | |
1225 | .poll = rfkill_fop_poll, | |
1226 | .release = rfkill_fop_release, | |
1227 | #ifdef CONFIG_RFKILL_INPUT | |
1228 | .unlocked_ioctl = rfkill_fop_ioctl, | |
1229 | .compat_ioctl = rfkill_fop_ioctl, | |
1230 | #endif | |
6038f373 | 1231 | .llseek = no_llseek, |
c64fb016 JB |
1232 | }; |
1233 | ||
1234 | static struct miscdevice rfkill_miscdev = { | |
1235 | .name = "rfkill", | |
1236 | .fops = &rfkill_fops, | |
1237 | .minor = MISC_DYNAMIC_MINOR, | |
1238 | }; | |
19d337df JB |
1239 | |
1240 | static int __init rfkill_init(void) | |
1241 | { | |
1242 | int error; | |
1243 | int i; | |
1244 | ||
1245 | for (i = 0; i < NUM_RFKILL_TYPES; i++) | |
b3fa1329 | 1246 | rfkill_global_states[i].cur = !rfkill_default_state; |
19d337df JB |
1247 | |
1248 | error = class_register(&rfkill_class); | |
1249 | if (error) | |
1250 | goto out; | |
1251 | ||
c64fb016 JB |
1252 | error = misc_register(&rfkill_miscdev); |
1253 | if (error) { | |
1254 | class_unregister(&rfkill_class); | |
1255 | goto out; | |
1256 | } | |
1257 | ||
19d337df JB |
1258 | #ifdef CONFIG_RFKILL_INPUT |
1259 | error = rfkill_handler_init(); | |
c64fb016 JB |
1260 | if (error) { |
1261 | misc_deregister(&rfkill_miscdev); | |
19d337df | 1262 | class_unregister(&rfkill_class); |
c64fb016 JB |
1263 | goto out; |
1264 | } | |
19d337df JB |
1265 | #endif |
1266 | ||
1267 | out: | |
1268 | return error; | |
1269 | } | |
1270 | subsys_initcall(rfkill_init); | |
1271 | ||
1272 | static void __exit rfkill_exit(void) | |
1273 | { | |
1274 | #ifdef CONFIG_RFKILL_INPUT | |
1275 | rfkill_handler_exit(); | |
1276 | #endif | |
c64fb016 | 1277 | misc_deregister(&rfkill_miscdev); |
19d337df JB |
1278 | class_unregister(&rfkill_class); |
1279 | } | |
1280 | module_exit(rfkill_exit); |