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authorDan Williams <dan.j.williams@intel.com>2009-09-08 20:55:21 -0400
committerDan Williams <dan.j.williams@intel.com>2009-09-08 20:55:21 -0400
commitbbb20089a3275a19e475dbc21320c3742e3ca423 (patch)
tree216fdc1cbef450ca688135c5b8969169482d9a48 /net/rfkill
parent3e48e656903e9fd8bc805c6a2c4264d7808d315b (diff)
parent657a77fa7284d8ae28dfa48f1dc5d919bf5b2843 (diff)
Merge branch 'dmaengine' into async-tx-next
Conflicts: crypto/async_tx/async_xor.c drivers/dma/ioat/dma_v2.h drivers/dma/ioat/pci.c drivers/md/raid5.c
Diffstat (limited to 'net/rfkill')
-rw-r--r--net/rfkill/Kconfig21
-rw-r--r--net/rfkill/Makefile5
-rw-r--r--net/rfkill/core.c1225
-rw-r--r--net/rfkill/input.c342
-rw-r--r--net/rfkill/rfkill-input.c459
-rw-r--r--net/rfkill/rfkill.c882
-rw-r--r--net/rfkill/rfkill.h (renamed from net/rfkill/rfkill-input.h)10
7 files changed, 1585 insertions, 1359 deletions
diff --git a/net/rfkill/Kconfig b/net/rfkill/Kconfig
index 7f807b30cfbb..eaf765876458 100644
--- a/net/rfkill/Kconfig
+++ b/net/rfkill/Kconfig
@@ -10,22 +10,15 @@ menuconfig RFKILL
10 To compile this driver as a module, choose M here: the 10 To compile this driver as a module, choose M here: the
11 module will be called rfkill. 11 module will be called rfkill.
12 12
13config RFKILL_INPUT
14 tristate "Input layer to RF switch connector"
15 depends on RFKILL && INPUT
16 help
17 Say Y here if you want kernel automatically toggle state
18 of RF switches on and off when user presses appropriate
19 button or a key on the keyboard. Without this module you
20 need a some kind of userspace application to control
21 state of the switches.
22
23 To compile this driver as a module, choose M here: the
24 module will be called rfkill-input.
25
26# LED trigger support 13# LED trigger support
27config RFKILL_LEDS 14config RFKILL_LEDS
28 bool 15 bool
29 depends on RFKILL && LEDS_TRIGGERS 16 depends on RFKILL
17 depends on LEDS_TRIGGERS = y || RFKILL = LEDS_TRIGGERS
30 default y 18 default y
31 19
20config RFKILL_INPUT
21 bool "RF switch input support" if EMBEDDED
22 depends on RFKILL
23 depends on INPUT = y || RFKILL = INPUT
24 default y if !EMBEDDED
diff --git a/net/rfkill/Makefile b/net/rfkill/Makefile
index b38c430be057..662105352691 100644
--- a/net/rfkill/Makefile
+++ b/net/rfkill/Makefile
@@ -2,5 +2,6 @@
2# Makefile for the RF switch subsystem. 2# Makefile for the RF switch subsystem.
3# 3#
4 4
5obj-$(CONFIG_RFKILL) += rfkill.o 5rfkill-y += core.o
6obj-$(CONFIG_RFKILL_INPUT) += rfkill-input.o 6rfkill-$(CONFIG_RFKILL_INPUT) += input.o
7obj-$(CONFIG_RFKILL) += rfkill.o
diff --git a/net/rfkill/core.c b/net/rfkill/core.c
new file mode 100644
index 000000000000..79693fe2001e
--- /dev/null
+++ b/net/rfkill/core.c
@@ -0,0 +1,1225 @@
1/*
2 * Copyright (C) 2006 - 2007 Ivo van Doorn
3 * Copyright (C) 2007 Dmitry Torokhov
4 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the
18 * Free Software Foundation, Inc.,
19 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/workqueue.h>
26#include <linux/capability.h>
27#include <linux/list.h>
28#include <linux/mutex.h>
29#include <linux/rfkill.h>
30#include <linux/spinlock.h>
31#include <linux/miscdevice.h>
32#include <linux/wait.h>
33#include <linux/poll.h>
34#include <linux/fs.h>
35
36#include "rfkill.h"
37
38#define POLL_INTERVAL (5 * HZ)
39
40#define RFKILL_BLOCK_HW BIT(0)
41#define RFKILL_BLOCK_SW BIT(1)
42#define RFKILL_BLOCK_SW_PREV BIT(2)
43#define RFKILL_BLOCK_ANY (RFKILL_BLOCK_HW |\
44 RFKILL_BLOCK_SW |\
45 RFKILL_BLOCK_SW_PREV)
46#define RFKILL_BLOCK_SW_SETCALL BIT(31)
47
48struct rfkill {
49 spinlock_t lock;
50
51 const char *name;
52 enum rfkill_type type;
53
54 unsigned long state;
55
56 u32 idx;
57
58 bool registered;
59 bool persistent;
60
61 const struct rfkill_ops *ops;
62 void *data;
63
64#ifdef CONFIG_RFKILL_LEDS
65 struct led_trigger led_trigger;
66 const char *ledtrigname;
67#endif
68
69 struct device dev;
70 struct list_head node;
71
72 struct delayed_work poll_work;
73 struct work_struct uevent_work;
74 struct work_struct sync_work;
75};
76#define to_rfkill(d) container_of(d, struct rfkill, dev)
77
78struct rfkill_int_event {
79 struct list_head list;
80 struct rfkill_event ev;
81};
82
83struct rfkill_data {
84 struct list_head list;
85 struct list_head events;
86 struct mutex mtx;
87 wait_queue_head_t read_wait;
88 bool input_handler;
89};
90
91
92MODULE_AUTHOR("Ivo van Doorn <IvDoorn@gmail.com>");
93MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
94MODULE_DESCRIPTION("RF switch support");
95MODULE_LICENSE("GPL");
96
97
98/*
99 * The locking here should be made much smarter, we currently have
100 * a bit of a stupid situation because drivers might want to register
101 * the rfkill struct under their own lock, and take this lock during
102 * rfkill method calls -- which will cause an AB-BA deadlock situation.
103 *
104 * To fix that, we need to rework this code here to be mostly lock-free
105 * and only use the mutex for list manipulations, not to protect the
106 * various other global variables. Then we can avoid holding the mutex
107 * around driver operations, and all is happy.
108 */
109static LIST_HEAD(rfkill_list); /* list of registered rf switches */
110static DEFINE_MUTEX(rfkill_global_mutex);
111static LIST_HEAD(rfkill_fds); /* list of open fds of /dev/rfkill */
112
113static unsigned int rfkill_default_state = 1;
114module_param_named(default_state, rfkill_default_state, uint, 0444);
115MODULE_PARM_DESC(default_state,
116 "Default initial state for all radio types, 0 = radio off");
117
118static struct {
119 bool cur, sav;
120} rfkill_global_states[NUM_RFKILL_TYPES];
121
122static bool rfkill_epo_lock_active;
123
124
125#ifdef CONFIG_RFKILL_LEDS
126static void rfkill_led_trigger_event(struct rfkill *rfkill)
127{
128 struct led_trigger *trigger;
129
130 if (!rfkill->registered)
131 return;
132
133 trigger = &rfkill->led_trigger;
134
135 if (rfkill->state & RFKILL_BLOCK_ANY)
136 led_trigger_event(trigger, LED_OFF);
137 else
138 led_trigger_event(trigger, LED_FULL);
139}
140
141static void rfkill_led_trigger_activate(struct led_classdev *led)
142{
143 struct rfkill *rfkill;
144
145 rfkill = container_of(led->trigger, struct rfkill, led_trigger);
146
147 rfkill_led_trigger_event(rfkill);
148}
149
150const char *rfkill_get_led_trigger_name(struct rfkill *rfkill)
151{
152 return rfkill->led_trigger.name;
153}
154EXPORT_SYMBOL(rfkill_get_led_trigger_name);
155
156void rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name)
157{
158 BUG_ON(!rfkill);
159
160 rfkill->ledtrigname = name;
161}
162EXPORT_SYMBOL(rfkill_set_led_trigger_name);
163
164static int rfkill_led_trigger_register(struct rfkill *rfkill)
165{
166 rfkill->led_trigger.name = rfkill->ledtrigname
167 ? : dev_name(&rfkill->dev);
168 rfkill->led_trigger.activate = rfkill_led_trigger_activate;
169 return led_trigger_register(&rfkill->led_trigger);
170}
171
172static void rfkill_led_trigger_unregister(struct rfkill *rfkill)
173{
174 led_trigger_unregister(&rfkill->led_trigger);
175}
176#else
177static void rfkill_led_trigger_event(struct rfkill *rfkill)
178{
179}
180
181static inline int rfkill_led_trigger_register(struct rfkill *rfkill)
182{
183 return 0;
184}
185
186static inline void rfkill_led_trigger_unregister(struct rfkill *rfkill)
187{
188}
189#endif /* CONFIG_RFKILL_LEDS */
190
191static void rfkill_fill_event(struct rfkill_event *ev, struct rfkill *rfkill,
192 enum rfkill_operation op)
193{
194 unsigned long flags;
195
196 ev->idx = rfkill->idx;
197 ev->type = rfkill->type;
198 ev->op = op;
199
200 spin_lock_irqsave(&rfkill->lock, flags);
201 ev->hard = !!(rfkill->state & RFKILL_BLOCK_HW);
202 ev->soft = !!(rfkill->state & (RFKILL_BLOCK_SW |
203 RFKILL_BLOCK_SW_PREV));
204 spin_unlock_irqrestore(&rfkill->lock, flags);
205}
206
207static void rfkill_send_events(struct rfkill *rfkill, enum rfkill_operation op)
208{
209 struct rfkill_data *data;
210 struct rfkill_int_event *ev;
211
212 list_for_each_entry(data, &rfkill_fds, list) {
213 ev = kzalloc(sizeof(*ev), GFP_KERNEL);
214 if (!ev)
215 continue;
216 rfkill_fill_event(&ev->ev, rfkill, op);
217 mutex_lock(&data->mtx);
218 list_add_tail(&ev->list, &data->events);
219 mutex_unlock(&data->mtx);
220 wake_up_interruptible(&data->read_wait);
221 }
222}
223
224static void rfkill_event(struct rfkill *rfkill)
225{
226 if (!rfkill->registered)
227 return;
228
229 kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE);
230
231 /* also send event to /dev/rfkill */
232 rfkill_send_events(rfkill, RFKILL_OP_CHANGE);
233}
234
235static bool __rfkill_set_hw_state(struct rfkill *rfkill,
236 bool blocked, bool *change)
237{
238 unsigned long flags;
239 bool prev, any;
240
241 BUG_ON(!rfkill);
242
243 spin_lock_irqsave(&rfkill->lock, flags);
244 prev = !!(rfkill->state & RFKILL_BLOCK_HW);
245 if (blocked)
246 rfkill->state |= RFKILL_BLOCK_HW;
247 else
248 rfkill->state &= ~RFKILL_BLOCK_HW;
249 *change = prev != blocked;
250 any = rfkill->state & RFKILL_BLOCK_ANY;
251 spin_unlock_irqrestore(&rfkill->lock, flags);
252
253 rfkill_led_trigger_event(rfkill);
254
255 return any;
256}
257
258/**
259 * rfkill_set_block - wrapper for set_block method
260 *
261 * @rfkill: the rfkill struct to use
262 * @blocked: the new software state
263 *
264 * Calls the set_block method (when applicable) and handles notifications
265 * etc. as well.
266 */
267static void rfkill_set_block(struct rfkill *rfkill, bool blocked)
268{
269 unsigned long flags;
270 int err;
271
272 if (unlikely(rfkill->dev.power.power_state.event & PM_EVENT_SLEEP))
273 return;
274
275 /*
276 * Some platforms (...!) generate input events which affect the
277 * _hard_ kill state -- whenever something tries to change the
278 * current software state query the hardware state too.
279 */
280 if (rfkill->ops->query)
281 rfkill->ops->query(rfkill, rfkill->data);
282
283 spin_lock_irqsave(&rfkill->lock, flags);
284 if (rfkill->state & RFKILL_BLOCK_SW)
285 rfkill->state |= RFKILL_BLOCK_SW_PREV;
286 else
287 rfkill->state &= ~RFKILL_BLOCK_SW_PREV;
288
289 if (blocked)
290 rfkill->state |= RFKILL_BLOCK_SW;
291 else
292 rfkill->state &= ~RFKILL_BLOCK_SW;
293
294 rfkill->state |= RFKILL_BLOCK_SW_SETCALL;
295 spin_unlock_irqrestore(&rfkill->lock, flags);
296
297 err = rfkill->ops->set_block(rfkill->data, blocked);
298
299 spin_lock_irqsave(&rfkill->lock, flags);
300 if (err) {
301 /*
302 * Failed -- reset status to _prev, this may be different
303 * from what set set _PREV to earlier in this function
304 * if rfkill_set_sw_state was invoked.
305 */
306 if (rfkill->state & RFKILL_BLOCK_SW_PREV)
307 rfkill->state |= RFKILL_BLOCK_SW;
308 else
309 rfkill->state &= ~RFKILL_BLOCK_SW;
310 }
311 rfkill->state &= ~RFKILL_BLOCK_SW_SETCALL;
312 rfkill->state &= ~RFKILL_BLOCK_SW_PREV;
313 spin_unlock_irqrestore(&rfkill->lock, flags);
314
315 rfkill_led_trigger_event(rfkill);
316 rfkill_event(rfkill);
317}
318
319#ifdef CONFIG_RFKILL_INPUT
320static atomic_t rfkill_input_disabled = ATOMIC_INIT(0);
321
322/**
323 * __rfkill_switch_all - Toggle state of all switches of given type
324 * @type: type of interfaces to be affected
325 * @state: the new state
326 *
327 * This function sets the state of all switches of given type,
328 * unless a specific switch is claimed by userspace (in which case,
329 * that switch is left alone) or suspended.
330 *
331 * Caller must have acquired rfkill_global_mutex.
332 */
333static void __rfkill_switch_all(const enum rfkill_type type, bool blocked)
334{
335 struct rfkill *rfkill;
336
337 rfkill_global_states[type].cur = blocked;
338 list_for_each_entry(rfkill, &rfkill_list, node) {
339 if (rfkill->type != type)
340 continue;
341
342 rfkill_set_block(rfkill, blocked);
343 }
344}
345
346/**
347 * rfkill_switch_all - Toggle state of all switches of given type
348 * @type: type of interfaces to be affected
349 * @state: the new state
350 *
351 * Acquires rfkill_global_mutex and calls __rfkill_switch_all(@type, @state).
352 * Please refer to __rfkill_switch_all() for details.
353 *
354 * Does nothing if the EPO lock is active.
355 */
356void rfkill_switch_all(enum rfkill_type type, bool blocked)
357{
358 if (atomic_read(&rfkill_input_disabled))
359 return;
360
361 mutex_lock(&rfkill_global_mutex);
362
363 if (!rfkill_epo_lock_active)
364 __rfkill_switch_all(type, blocked);
365
366 mutex_unlock(&rfkill_global_mutex);
367}
368
369/**
370 * rfkill_epo - emergency power off all transmitters
371 *
372 * This kicks all non-suspended rfkill devices to RFKILL_STATE_SOFT_BLOCKED,
373 * ignoring everything in its path but rfkill_global_mutex and rfkill->mutex.
374 *
375 * The global state before the EPO is saved and can be restored later
376 * using rfkill_restore_states().
377 */
378void rfkill_epo(void)
379{
380 struct rfkill *rfkill;
381 int i;
382
383 if (atomic_read(&rfkill_input_disabled))
384 return;
385
386 mutex_lock(&rfkill_global_mutex);
387
388 rfkill_epo_lock_active = true;
389 list_for_each_entry(rfkill, &rfkill_list, node)
390 rfkill_set_block(rfkill, true);
391
392 for (i = 0; i < NUM_RFKILL_TYPES; i++) {
393 rfkill_global_states[i].sav = rfkill_global_states[i].cur;
394 rfkill_global_states[i].cur = true;
395 }
396
397 mutex_unlock(&rfkill_global_mutex);
398}
399
400/**
401 * rfkill_restore_states - restore global states
402 *
403 * Restore (and sync switches to) the global state from the
404 * states in rfkill_default_states. This can undo the effects of
405 * a call to rfkill_epo().
406 */
407void rfkill_restore_states(void)
408{
409 int i;
410
411 if (atomic_read(&rfkill_input_disabled))
412 return;
413
414 mutex_lock(&rfkill_global_mutex);
415
416 rfkill_epo_lock_active = false;
417 for (i = 0; i < NUM_RFKILL_TYPES; i++)
418 __rfkill_switch_all(i, rfkill_global_states[i].sav);
419 mutex_unlock(&rfkill_global_mutex);
420}
421
422/**
423 * rfkill_remove_epo_lock - unlock state changes
424 *
425 * Used by rfkill-input manually unlock state changes, when
426 * the EPO switch is deactivated.
427 */
428void rfkill_remove_epo_lock(void)
429{
430 if (atomic_read(&rfkill_input_disabled))
431 return;
432
433 mutex_lock(&rfkill_global_mutex);
434 rfkill_epo_lock_active = false;
435 mutex_unlock(&rfkill_global_mutex);
436}
437
438/**
439 * rfkill_is_epo_lock_active - returns true EPO is active
440 *
441 * Returns 0 (false) if there is NOT an active EPO contidion,
442 * and 1 (true) if there is an active EPO contition, which
443 * locks all radios in one of the BLOCKED states.
444 *
445 * Can be called in atomic context.
446 */
447bool rfkill_is_epo_lock_active(void)
448{
449 return rfkill_epo_lock_active;
450}
451
452/**
453 * rfkill_get_global_sw_state - returns global state for a type
454 * @type: the type to get the global state of
455 *
456 * Returns the current global state for a given wireless
457 * device type.
458 */
459bool rfkill_get_global_sw_state(const enum rfkill_type type)
460{
461 return rfkill_global_states[type].cur;
462}
463#endif
464
465
466bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
467{
468 bool ret, change;
469
470 ret = __rfkill_set_hw_state(rfkill, blocked, &change);
471
472 if (!rfkill->registered)
473 return ret;
474
475 if (change)
476 schedule_work(&rfkill->uevent_work);
477
478 return ret;
479}
480EXPORT_SYMBOL(rfkill_set_hw_state);
481
482static void __rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
483{
484 u32 bit = RFKILL_BLOCK_SW;
485
486 /* if in a ops->set_block right now, use other bit */
487 if (rfkill->state & RFKILL_BLOCK_SW_SETCALL)
488 bit = RFKILL_BLOCK_SW_PREV;
489
490 if (blocked)
491 rfkill->state |= bit;
492 else
493 rfkill->state &= ~bit;
494}
495
496bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
497{
498 unsigned long flags;
499 bool prev, hwblock;
500
501 BUG_ON(!rfkill);
502
503 spin_lock_irqsave(&rfkill->lock, flags);
504 prev = !!(rfkill->state & RFKILL_BLOCK_SW);
505 __rfkill_set_sw_state(rfkill, blocked);
506 hwblock = !!(rfkill->state & RFKILL_BLOCK_HW);
507 blocked = blocked || hwblock;
508 spin_unlock_irqrestore(&rfkill->lock, flags);
509
510 if (!rfkill->registered)
511 return blocked;
512
513 if (prev != blocked && !hwblock)
514 schedule_work(&rfkill->uevent_work);
515
516 rfkill_led_trigger_event(rfkill);
517
518 return blocked;
519}
520EXPORT_SYMBOL(rfkill_set_sw_state);
521
522void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked)
523{
524 unsigned long flags;
525
526 BUG_ON(!rfkill);
527 BUG_ON(rfkill->registered);
528
529 spin_lock_irqsave(&rfkill->lock, flags);
530 __rfkill_set_sw_state(rfkill, blocked);
531 rfkill->persistent = true;
532 spin_unlock_irqrestore(&rfkill->lock, flags);
533}
534EXPORT_SYMBOL(rfkill_init_sw_state);
535
536void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw)
537{
538 unsigned long flags;
539 bool swprev, hwprev;
540
541 BUG_ON(!rfkill);
542
543 spin_lock_irqsave(&rfkill->lock, flags);
544
545 /*
546 * No need to care about prev/setblock ... this is for uevent only
547 * and that will get triggered by rfkill_set_block anyway.
548 */
549 swprev = !!(rfkill->state & RFKILL_BLOCK_SW);
550 hwprev = !!(rfkill->state & RFKILL_BLOCK_HW);
551 __rfkill_set_sw_state(rfkill, sw);
552
553 spin_unlock_irqrestore(&rfkill->lock, flags);
554
555 if (!rfkill->registered) {
556 rfkill->persistent = true;
557 } else {
558 if (swprev != sw || hwprev != hw)
559 schedule_work(&rfkill->uevent_work);
560
561 rfkill_led_trigger_event(rfkill);
562 }
563}
564EXPORT_SYMBOL(rfkill_set_states);
565
566static ssize_t rfkill_name_show(struct device *dev,
567 struct device_attribute *attr,
568 char *buf)
569{
570 struct rfkill *rfkill = to_rfkill(dev);
571
572 return sprintf(buf, "%s\n", rfkill->name);
573}
574
575static const char *rfkill_get_type_str(enum rfkill_type type)
576{
577 switch (type) {
578 case RFKILL_TYPE_WLAN:
579 return "wlan";
580 case RFKILL_TYPE_BLUETOOTH:
581 return "bluetooth";
582 case RFKILL_TYPE_UWB:
583 return "ultrawideband";
584 case RFKILL_TYPE_WIMAX:
585 return "wimax";
586 case RFKILL_TYPE_WWAN:
587 return "wwan";
588 default:
589 BUG();
590 }
591
592 BUILD_BUG_ON(NUM_RFKILL_TYPES != RFKILL_TYPE_WWAN + 1);
593}
594
595static ssize_t rfkill_type_show(struct device *dev,
596 struct device_attribute *attr,
597 char *buf)
598{
599 struct rfkill *rfkill = to_rfkill(dev);
600
601 return sprintf(buf, "%s\n", rfkill_get_type_str(rfkill->type));
602}
603
604static ssize_t rfkill_idx_show(struct device *dev,
605 struct device_attribute *attr,
606 char *buf)
607{
608 struct rfkill *rfkill = to_rfkill(dev);
609
610 return sprintf(buf, "%d\n", rfkill->idx);
611}
612
613static ssize_t rfkill_persistent_show(struct device *dev,
614 struct device_attribute *attr,
615 char *buf)
616{
617 struct rfkill *rfkill = to_rfkill(dev);
618
619 return sprintf(buf, "%d\n", rfkill->persistent);
620}
621
622static u8 user_state_from_blocked(unsigned long state)
623{
624 if (state & RFKILL_BLOCK_HW)
625 return RFKILL_USER_STATE_HARD_BLOCKED;
626 if (state & RFKILL_BLOCK_SW)
627 return RFKILL_USER_STATE_SOFT_BLOCKED;
628
629 return RFKILL_USER_STATE_UNBLOCKED;
630}
631
632static ssize_t rfkill_state_show(struct device *dev,
633 struct device_attribute *attr,
634 char *buf)
635{
636 struct rfkill *rfkill = to_rfkill(dev);
637 unsigned long flags;
638 u32 state;
639
640 spin_lock_irqsave(&rfkill->lock, flags);
641 state = rfkill->state;
642 spin_unlock_irqrestore(&rfkill->lock, flags);
643
644 return sprintf(buf, "%d\n", user_state_from_blocked(state));
645}
646
647static ssize_t rfkill_state_store(struct device *dev,
648 struct device_attribute *attr,
649 const char *buf, size_t count)
650{
651 /*
652 * The intention was that userspace can only take control over
653 * a given device when/if rfkill-input doesn't control it due
654 * to user_claim. Since user_claim is currently unsupported,
655 * we never support changing the state from userspace -- this
656 * can be implemented again later.
657 */
658
659 return -EPERM;
660}
661
662static ssize_t rfkill_claim_show(struct device *dev,
663 struct device_attribute *attr,
664 char *buf)
665{
666 return sprintf(buf, "%d\n", 0);
667}
668
669static ssize_t rfkill_claim_store(struct device *dev,
670 struct device_attribute *attr,
671 const char *buf, size_t count)
672{
673 return -EOPNOTSUPP;
674}
675
676static struct device_attribute rfkill_dev_attrs[] = {
677 __ATTR(name, S_IRUGO, rfkill_name_show, NULL),
678 __ATTR(type, S_IRUGO, rfkill_type_show, NULL),
679 __ATTR(index, S_IRUGO, rfkill_idx_show, NULL),
680 __ATTR(persistent, S_IRUGO, rfkill_persistent_show, NULL),
681 __ATTR(state, S_IRUGO|S_IWUSR, rfkill_state_show, rfkill_state_store),
682 __ATTR(claim, S_IRUGO|S_IWUSR, rfkill_claim_show, rfkill_claim_store),
683 __ATTR_NULL
684};
685
686static void rfkill_release(struct device *dev)
687{
688 struct rfkill *rfkill = to_rfkill(dev);
689
690 kfree(rfkill);
691}
692
693static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
694{
695 struct rfkill *rfkill = to_rfkill(dev);
696 unsigned long flags;
697 u32 state;
698 int error;
699
700 error = add_uevent_var(env, "RFKILL_NAME=%s", rfkill->name);
701 if (error)
702 return error;
703 error = add_uevent_var(env, "RFKILL_TYPE=%s",
704 rfkill_get_type_str(rfkill->type));
705 if (error)
706 return error;
707 spin_lock_irqsave(&rfkill->lock, flags);
708 state = rfkill->state;
709 spin_unlock_irqrestore(&rfkill->lock, flags);
710 error = add_uevent_var(env, "RFKILL_STATE=%d",
711 user_state_from_blocked(state));
712 return error;
713}
714
715void rfkill_pause_polling(struct rfkill *rfkill)
716{
717 BUG_ON(!rfkill);
718
719 if (!rfkill->ops->poll)
720 return;
721
722 cancel_delayed_work_sync(&rfkill->poll_work);
723}
724EXPORT_SYMBOL(rfkill_pause_polling);
725
726void rfkill_resume_polling(struct rfkill *rfkill)
727{
728 BUG_ON(!rfkill);
729
730 if (!rfkill->ops->poll)
731 return;
732
733 schedule_work(&rfkill->poll_work.work);
734}
735EXPORT_SYMBOL(rfkill_resume_polling);
736
737static int rfkill_suspend(struct device *dev, pm_message_t state)
738{
739 struct rfkill *rfkill = to_rfkill(dev);
740
741 rfkill_pause_polling(rfkill);
742
743 return 0;
744}
745
746static int rfkill_resume(struct device *dev)
747{
748 struct rfkill *rfkill = to_rfkill(dev);
749 bool cur;
750
751 if (!rfkill->persistent) {
752 cur = !!(rfkill->state & RFKILL_BLOCK_SW);
753 rfkill_set_block(rfkill, cur);
754 }
755
756 rfkill_resume_polling(rfkill);
757
758 return 0;
759}
760
761static struct class rfkill_class = {
762 .name = "rfkill",
763 .dev_release = rfkill_release,
764 .dev_attrs = rfkill_dev_attrs,
765 .dev_uevent = rfkill_dev_uevent,
766 .suspend = rfkill_suspend,
767 .resume = rfkill_resume,
768};
769
770bool rfkill_blocked(struct rfkill *rfkill)
771{
772 unsigned long flags;
773 u32 state;
774
775 spin_lock_irqsave(&rfkill->lock, flags);
776 state = rfkill->state;
777 spin_unlock_irqrestore(&rfkill->lock, flags);
778
779 return !!(state & RFKILL_BLOCK_ANY);
780}
781EXPORT_SYMBOL(rfkill_blocked);
782
783
784struct rfkill * __must_check rfkill_alloc(const char *name,
785 struct device *parent,
786 const enum rfkill_type type,
787 const struct rfkill_ops *ops,
788 void *ops_data)
789{
790 struct rfkill *rfkill;
791 struct device *dev;
792
793 if (WARN_ON(!ops))
794 return NULL;
795
796 if (WARN_ON(!ops->set_block))
797 return NULL;
798
799 if (WARN_ON(!name))
800 return NULL;
801
802 if (WARN_ON(type == RFKILL_TYPE_ALL || type >= NUM_RFKILL_TYPES))
803 return NULL;
804
805 rfkill = kzalloc(sizeof(*rfkill), GFP_KERNEL);
806 if (!rfkill)
807 return NULL;
808
809 spin_lock_init(&rfkill->lock);
810 INIT_LIST_HEAD(&rfkill->node);
811 rfkill->type = type;
812 rfkill->name = name;
813 rfkill->ops = ops;
814 rfkill->data = ops_data;
815
816 dev = &rfkill->dev;
817 dev->class = &rfkill_class;
818 dev->parent = parent;
819 device_initialize(dev);
820
821 return rfkill;
822}
823EXPORT_SYMBOL(rfkill_alloc);
824
825static void rfkill_poll(struct work_struct *work)
826{
827 struct rfkill *rfkill;
828
829 rfkill = container_of(work, struct rfkill, poll_work.work);
830
831 /*
832 * Poll hardware state -- driver will use one of the
833 * rfkill_set{,_hw,_sw}_state functions and use its
834 * return value to update the current status.
835 */
836 rfkill->ops->poll(rfkill, rfkill->data);
837
838 schedule_delayed_work(&rfkill->poll_work,
839 round_jiffies_relative(POLL_INTERVAL));
840}
841
842static void rfkill_uevent_work(struct work_struct *work)
843{
844 struct rfkill *rfkill;
845
846 rfkill = container_of(work, struct rfkill, uevent_work);
847
848 mutex_lock(&rfkill_global_mutex);
849 rfkill_event(rfkill);
850 mutex_unlock(&rfkill_global_mutex);
851}
852
853static void rfkill_sync_work(struct work_struct *work)
854{
855 struct rfkill *rfkill;
856 bool cur;
857
858 rfkill = container_of(work, struct rfkill, sync_work);
859
860 mutex_lock(&rfkill_global_mutex);
861 cur = rfkill_global_states[rfkill->type].cur;
862 rfkill_set_block(rfkill, cur);
863 mutex_unlock(&rfkill_global_mutex);
864}
865
866int __must_check rfkill_register(struct rfkill *rfkill)
867{
868 static unsigned long rfkill_no;
869 struct device *dev = &rfkill->dev;
870 int error;
871
872 BUG_ON(!rfkill);
873
874 mutex_lock(&rfkill_global_mutex);
875
876 if (rfkill->registered) {
877 error = -EALREADY;
878 goto unlock;
879 }
880
881 rfkill->idx = rfkill_no;
882 dev_set_name(dev, "rfkill%lu", rfkill_no);
883 rfkill_no++;
884
885 list_add_tail(&rfkill->node, &rfkill_list);
886
887 error = device_add(dev);
888 if (error)
889 goto remove;
890
891 error = rfkill_led_trigger_register(rfkill);
892 if (error)
893 goto devdel;
894
895 rfkill->registered = true;
896
897 INIT_DELAYED_WORK(&rfkill->poll_work, rfkill_poll);
898 INIT_WORK(&rfkill->uevent_work, rfkill_uevent_work);
899 INIT_WORK(&rfkill->sync_work, rfkill_sync_work);
900
901 if (rfkill->ops->poll)
902 schedule_delayed_work(&rfkill->poll_work,
903 round_jiffies_relative(POLL_INTERVAL));
904
905 if (!rfkill->persistent || rfkill_epo_lock_active) {
906 schedule_work(&rfkill->sync_work);
907 } else {
908#ifdef CONFIG_RFKILL_INPUT
909 bool soft_blocked = !!(rfkill->state & RFKILL_BLOCK_SW);
910
911 if (!atomic_read(&rfkill_input_disabled))
912 __rfkill_switch_all(rfkill->type, soft_blocked);
913#endif
914 }
915
916 rfkill_send_events(rfkill, RFKILL_OP_ADD);
917
918 mutex_unlock(&rfkill_global_mutex);
919 return 0;
920
921 devdel:
922 device_del(&rfkill->dev);
923 remove:
924 list_del_init(&rfkill->node);
925 unlock:
926 mutex_unlock(&rfkill_global_mutex);
927 return error;
928}
929EXPORT_SYMBOL(rfkill_register);
930
931void rfkill_unregister(struct rfkill *rfkill)
932{
933 BUG_ON(!rfkill);
934
935 if (rfkill->ops->poll)
936 cancel_delayed_work_sync(&rfkill->poll_work);
937
938 cancel_work_sync(&rfkill->uevent_work);
939 cancel_work_sync(&rfkill->sync_work);
940
941 rfkill->registered = false;
942
943 device_del(&rfkill->dev);
944
945 mutex_lock(&rfkill_global_mutex);
946 rfkill_send_events(rfkill, RFKILL_OP_DEL);
947 list_del_init(&rfkill->node);
948 mutex_unlock(&rfkill_global_mutex);
949
950 rfkill_led_trigger_unregister(rfkill);
951}
952EXPORT_SYMBOL(rfkill_unregister);
953
954void rfkill_destroy(struct rfkill *rfkill)
955{
956 if (rfkill)
957 put_device(&rfkill->dev);
958}
959EXPORT_SYMBOL(rfkill_destroy);
960
961static int rfkill_fop_open(struct inode *inode, struct file *file)
962{
963 struct rfkill_data *data;
964 struct rfkill *rfkill;
965 struct rfkill_int_event *ev, *tmp;
966
967 data = kzalloc(sizeof(*data), GFP_KERNEL);
968 if (!data)
969 return -ENOMEM;
970
971 INIT_LIST_HEAD(&data->events);
972 mutex_init(&data->mtx);
973 init_waitqueue_head(&data->read_wait);
974
975 mutex_lock(&rfkill_global_mutex);
976 mutex_lock(&data->mtx);
977 /*
978 * start getting events from elsewhere but hold mtx to get
979 * startup events added first
980 */
981 list_add(&data->list, &rfkill_fds);
982
983 list_for_each_entry(rfkill, &rfkill_list, node) {
984 ev = kzalloc(sizeof(*ev), GFP_KERNEL);
985 if (!ev)
986 goto free;
987 rfkill_fill_event(&ev->ev, rfkill, RFKILL_OP_ADD);
988 list_add_tail(&ev->list, &data->events);
989 }
990 mutex_unlock(&data->mtx);
991 mutex_unlock(&rfkill_global_mutex);
992
993 file->private_data = data;
994
995 return nonseekable_open(inode, file);
996
997 free:
998 mutex_unlock(&data->mtx);
999 mutex_unlock(&rfkill_global_mutex);
1000 mutex_destroy(&data->mtx);
1001 list_for_each_entry_safe(ev, tmp, &data->events, list)
1002 kfree(ev);
1003 kfree(data);
1004 return -ENOMEM;
1005}
1006
1007static unsigned int rfkill_fop_poll(struct file *file, poll_table *wait)
1008{
1009 struct rfkill_data *data = file->private_data;
1010 unsigned int res = POLLOUT | POLLWRNORM;
1011
1012 poll_wait(file, &data->read_wait, wait);
1013
1014 mutex_lock(&data->mtx);
1015 if (!list_empty(&data->events))
1016 res = POLLIN | POLLRDNORM;
1017 mutex_unlock(&data->mtx);
1018
1019 return res;
1020}
1021
1022static bool rfkill_readable(struct rfkill_data *data)
1023{
1024 bool r;
1025
1026 mutex_lock(&data->mtx);
1027 r = !list_empty(&data->events);
1028 mutex_unlock(&data->mtx);
1029
1030 return r;
1031}
1032
1033static ssize_t rfkill_fop_read(struct file *file, char __user *buf,
1034 size_t count, loff_t *pos)
1035{
1036 struct rfkill_data *data = file->private_data;
1037 struct rfkill_int_event *ev;
1038 unsigned long sz;
1039 int ret;
1040
1041 mutex_lock(&data->mtx);
1042
1043 while (list_empty(&data->events)) {
1044 if (file->f_flags & O_NONBLOCK) {
1045 ret = -EAGAIN;
1046 goto out;
1047 }
1048 mutex_unlock(&data->mtx);
1049 ret = wait_event_interruptible(data->read_wait,
1050 rfkill_readable(data));
1051 mutex_lock(&data->mtx);
1052
1053 if (ret)
1054 goto out;
1055 }
1056
1057 ev = list_first_entry(&data->events, struct rfkill_int_event,
1058 list);
1059
1060 sz = min_t(unsigned long, sizeof(ev->ev), count);
1061 ret = sz;
1062 if (copy_to_user(buf, &ev->ev, sz))
1063 ret = -EFAULT;
1064
1065 list_del(&ev->list);
1066 kfree(ev);
1067 out:
1068 mutex_unlock(&data->mtx);
1069 return ret;
1070}
1071
1072static ssize_t rfkill_fop_write(struct file *file, const char __user *buf,
1073 size_t count, loff_t *pos)
1074{
1075 struct rfkill *rfkill;
1076 struct rfkill_event ev;
1077
1078 /* we don't need the 'hard' variable but accept it */
1079 if (count < sizeof(ev) - 1)
1080 return -EINVAL;
1081
1082 if (copy_from_user(&ev, buf, sizeof(ev) - 1))
1083 return -EFAULT;
1084
1085 if (ev.op != RFKILL_OP_CHANGE && ev.op != RFKILL_OP_CHANGE_ALL)
1086 return -EINVAL;
1087
1088 if (ev.type >= NUM_RFKILL_TYPES)
1089 return -EINVAL;
1090
1091 mutex_lock(&rfkill_global_mutex);
1092
1093 if (ev.op == RFKILL_OP_CHANGE_ALL) {
1094 if (ev.type == RFKILL_TYPE_ALL) {
1095 enum rfkill_type i;
1096 for (i = 0; i < NUM_RFKILL_TYPES; i++)
1097 rfkill_global_states[i].cur = ev.soft;
1098 } else {
1099 rfkill_global_states[ev.type].cur = ev.soft;
1100 }
1101 }
1102
1103 list_for_each_entry(rfkill, &rfkill_list, node) {
1104 if (rfkill->idx != ev.idx && ev.op != RFKILL_OP_CHANGE_ALL)
1105 continue;
1106
1107 if (rfkill->type != ev.type && ev.type != RFKILL_TYPE_ALL)
1108 continue;
1109
1110 rfkill_set_block(rfkill, ev.soft);
1111 }
1112 mutex_unlock(&rfkill_global_mutex);
1113
1114 return count;
1115}
1116
1117static int rfkill_fop_release(struct inode *inode, struct file *file)
1118{
1119 struct rfkill_data *data = file->private_data;
1120 struct rfkill_int_event *ev, *tmp;
1121
1122 mutex_lock(&rfkill_global_mutex);
1123 list_del(&data->list);
1124 mutex_unlock(&rfkill_global_mutex);
1125
1126 mutex_destroy(&data->mtx);
1127 list_for_each_entry_safe(ev, tmp, &data->events, list)
1128 kfree(ev);
1129
1130#ifdef CONFIG_RFKILL_INPUT
1131 if (data->input_handler)
1132 if (atomic_dec_return(&rfkill_input_disabled) == 0)
1133 printk(KERN_DEBUG "rfkill: input handler enabled\n");
1134#endif
1135
1136 kfree(data);
1137
1138 return 0;
1139}
1140
1141#ifdef CONFIG_RFKILL_INPUT
1142static long rfkill_fop_ioctl(struct file *file, unsigned int cmd,
1143 unsigned long arg)
1144{
1145 struct rfkill_data *data = file->private_data;
1146
1147 if (_IOC_TYPE(cmd) != RFKILL_IOC_MAGIC)
1148 return -ENOSYS;
1149
1150 if (_IOC_NR(cmd) != RFKILL_IOC_NOINPUT)
1151 return -ENOSYS;
1152
1153 mutex_lock(&data->mtx);
1154
1155 if (!data->input_handler) {
1156 if (atomic_inc_return(&rfkill_input_disabled) == 1)
1157 printk(KERN_DEBUG "rfkill: input handler disabled\n");
1158 data->input_handler = true;
1159 }
1160
1161 mutex_unlock(&data->mtx);
1162
1163 return 0;
1164}
1165#endif
1166
1167static const struct file_operations rfkill_fops = {
1168 .open = rfkill_fop_open,
1169 .read = rfkill_fop_read,
1170 .write = rfkill_fop_write,
1171 .poll = rfkill_fop_poll,
1172 .release = rfkill_fop_release,
1173#ifdef CONFIG_RFKILL_INPUT
1174 .unlocked_ioctl = rfkill_fop_ioctl,
1175 .compat_ioctl = rfkill_fop_ioctl,
1176#endif
1177};
1178
1179static struct miscdevice rfkill_miscdev = {
1180 .name = "rfkill",
1181 .fops = &rfkill_fops,
1182 .minor = MISC_DYNAMIC_MINOR,
1183};
1184
1185static int __init rfkill_init(void)
1186{
1187 int error;
1188 int i;
1189
1190 for (i = 0; i < NUM_RFKILL_TYPES; i++)
1191 rfkill_global_states[i].cur = !rfkill_default_state;
1192
1193 error = class_register(&rfkill_class);
1194 if (error)
1195 goto out;
1196
1197 error = misc_register(&rfkill_miscdev);
1198 if (error) {
1199 class_unregister(&rfkill_class);
1200 goto out;
1201 }
1202
1203#ifdef CONFIG_RFKILL_INPUT
1204 error = rfkill_handler_init();
1205 if (error) {
1206 misc_deregister(&rfkill_miscdev);
1207 class_unregister(&rfkill_class);
1208 goto out;
1209 }
1210#endif
1211
1212 out:
1213 return error;
1214}
1215subsys_initcall(rfkill_init);
1216
1217static void __exit rfkill_exit(void)
1218{
1219#ifdef CONFIG_RFKILL_INPUT
1220 rfkill_handler_exit();
1221#endif
1222 misc_deregister(&rfkill_miscdev);
1223 class_unregister(&rfkill_class);
1224}
1225module_exit(rfkill_exit);
diff --git a/net/rfkill/input.c b/net/rfkill/input.c
new file mode 100644
index 000000000000..a7295ad5f9cb
--- /dev/null
+++ b/net/rfkill/input.c
@@ -0,0 +1,342 @@
1/*
2 * Input layer to RF Kill interface connector
3 *
4 * Copyright (c) 2007 Dmitry Torokhov
5 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published
9 * by the Free Software Foundation.
10 *
11 * If you ever run into a situation in which you have a SW_ type rfkill
12 * input device, then you can revive code that was removed in the patch
13 * "rfkill-input: remove unused code".
14 */
15
16#include <linux/input.h>
17#include <linux/slab.h>
18#include <linux/workqueue.h>
19#include <linux/init.h>
20#include <linux/rfkill.h>
21#include <linux/sched.h>
22
23#include "rfkill.h"
24
25enum rfkill_input_master_mode {
26 RFKILL_INPUT_MASTER_UNLOCK = 0,
27 RFKILL_INPUT_MASTER_RESTORE = 1,
28 RFKILL_INPUT_MASTER_UNBLOCKALL = 2,
29 NUM_RFKILL_INPUT_MASTER_MODES
30};
31
32/* Delay (in ms) between consecutive switch ops */
33#define RFKILL_OPS_DELAY 200
34
35static enum rfkill_input_master_mode rfkill_master_switch_mode =
36 RFKILL_INPUT_MASTER_UNBLOCKALL;
37module_param_named(master_switch_mode, rfkill_master_switch_mode, uint, 0);
38MODULE_PARM_DESC(master_switch_mode,
39 "SW_RFKILL_ALL ON should: 0=do nothing (only unlock); 1=restore; 2=unblock all");
40
41static spinlock_t rfkill_op_lock;
42static bool rfkill_op_pending;
43static unsigned long rfkill_sw_pending[BITS_TO_LONGS(NUM_RFKILL_TYPES)];
44static unsigned long rfkill_sw_state[BITS_TO_LONGS(NUM_RFKILL_TYPES)];
45
46enum rfkill_sched_op {
47 RFKILL_GLOBAL_OP_EPO = 0,
48 RFKILL_GLOBAL_OP_RESTORE,
49 RFKILL_GLOBAL_OP_UNLOCK,
50 RFKILL_GLOBAL_OP_UNBLOCK,
51};
52
53static enum rfkill_sched_op rfkill_master_switch_op;
54static enum rfkill_sched_op rfkill_op;
55
56static void __rfkill_handle_global_op(enum rfkill_sched_op op)
57{
58 unsigned int i;
59
60 switch (op) {
61 case RFKILL_GLOBAL_OP_EPO:
62 rfkill_epo();
63 break;
64 case RFKILL_GLOBAL_OP_RESTORE:
65 rfkill_restore_states();
66 break;
67 case RFKILL_GLOBAL_OP_UNLOCK:
68 rfkill_remove_epo_lock();
69 break;
70 case RFKILL_GLOBAL_OP_UNBLOCK:
71 rfkill_remove_epo_lock();
72 for (i = 0; i < NUM_RFKILL_TYPES; i++)
73 rfkill_switch_all(i, false);
74 break;
75 default:
76 /* memory corruption or bug, fail safely */
77 rfkill_epo();
78 WARN(1, "Unknown requested operation %d! "
79 "rfkill Emergency Power Off activated\n",
80 op);
81 }
82}
83
84static void __rfkill_handle_normal_op(const enum rfkill_type type,
85 const bool complement)
86{
87 bool blocked;
88
89 blocked = rfkill_get_global_sw_state(type);
90 if (complement)
91 blocked = !blocked;
92
93 rfkill_switch_all(type, blocked);
94}
95
96static void rfkill_op_handler(struct work_struct *work)
97{
98 unsigned int i;
99 bool c;
100
101 spin_lock_irq(&rfkill_op_lock);
102 do {
103 if (rfkill_op_pending) {
104 enum rfkill_sched_op op = rfkill_op;
105 rfkill_op_pending = false;
106 memset(rfkill_sw_pending, 0,
107 sizeof(rfkill_sw_pending));
108 spin_unlock_irq(&rfkill_op_lock);
109
110 __rfkill_handle_global_op(op);
111
112 spin_lock_irq(&rfkill_op_lock);
113
114 /*
115 * handle global ops first -- during unlocked period
116 * we might have gotten a new global op.
117 */
118 if (rfkill_op_pending)
119 continue;
120 }
121
122 if (rfkill_is_epo_lock_active())
123 continue;
124
125 for (i = 0; i < NUM_RFKILL_TYPES; i++) {
126 if (__test_and_clear_bit(i, rfkill_sw_pending)) {
127 c = __test_and_clear_bit(i, rfkill_sw_state);
128 spin_unlock_irq(&rfkill_op_lock);
129
130 __rfkill_handle_normal_op(i, c);
131
132 spin_lock_irq(&rfkill_op_lock);
133 }
134 }
135 } while (rfkill_op_pending);
136 spin_unlock_irq(&rfkill_op_lock);
137}
138
139static DECLARE_DELAYED_WORK(rfkill_op_work, rfkill_op_handler);
140static unsigned long rfkill_last_scheduled;
141
142static unsigned long rfkill_ratelimit(const unsigned long last)
143{
144 const unsigned long delay = msecs_to_jiffies(RFKILL_OPS_DELAY);
145 return (time_after(jiffies, last + delay)) ? 0 : delay;
146}
147
148static void rfkill_schedule_ratelimited(void)
149{
150 if (delayed_work_pending(&rfkill_op_work))
151 return;
152 schedule_delayed_work(&rfkill_op_work,
153 rfkill_ratelimit(rfkill_last_scheduled));
154 rfkill_last_scheduled = jiffies;
155}
156
157static void rfkill_schedule_global_op(enum rfkill_sched_op op)
158{
159 unsigned long flags;
160
161 spin_lock_irqsave(&rfkill_op_lock, flags);
162 rfkill_op = op;
163 rfkill_op_pending = true;
164 if (op == RFKILL_GLOBAL_OP_EPO && !rfkill_is_epo_lock_active()) {
165 /* bypass the limiter for EPO */
166 cancel_delayed_work(&rfkill_op_work);
167 schedule_delayed_work(&rfkill_op_work, 0);
168 rfkill_last_scheduled = jiffies;
169 } else
170 rfkill_schedule_ratelimited();
171 spin_unlock_irqrestore(&rfkill_op_lock, flags);
172}
173
174static void rfkill_schedule_toggle(enum rfkill_type type)
175{
176 unsigned long flags;
177
178 if (rfkill_is_epo_lock_active())
179 return;
180
181 spin_lock_irqsave(&rfkill_op_lock, flags);
182 if (!rfkill_op_pending) {
183 __set_bit(type, rfkill_sw_pending);
184 __change_bit(type, rfkill_sw_state);
185 rfkill_schedule_ratelimited();
186 }
187 spin_unlock_irqrestore(&rfkill_op_lock, flags);
188}
189
190static void rfkill_schedule_evsw_rfkillall(int state)
191{
192 if (state)
193 rfkill_schedule_global_op(rfkill_master_switch_op);
194 else
195 rfkill_schedule_global_op(RFKILL_GLOBAL_OP_EPO);
196}
197
198static void rfkill_event(struct input_handle *handle, unsigned int type,
199 unsigned int code, int data)
200{
201 if (type == EV_KEY && data == 1) {
202 switch (code) {
203 case KEY_WLAN:
204 rfkill_schedule_toggle(RFKILL_TYPE_WLAN);
205 break;
206 case KEY_BLUETOOTH:
207 rfkill_schedule_toggle(RFKILL_TYPE_BLUETOOTH);
208 break;
209 case KEY_UWB:
210 rfkill_schedule_toggle(RFKILL_TYPE_UWB);
211 break;
212 case KEY_WIMAX:
213 rfkill_schedule_toggle(RFKILL_TYPE_WIMAX);
214 break;
215 }
216 } else if (type == EV_SW && code == SW_RFKILL_ALL)
217 rfkill_schedule_evsw_rfkillall(data);
218}
219
220static int rfkill_connect(struct input_handler *handler, struct input_dev *dev,
221 const struct input_device_id *id)
222{
223 struct input_handle *handle;
224 int error;
225
226 handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
227 if (!handle)
228 return -ENOMEM;
229
230 handle->dev = dev;
231 handle->handler = handler;
232 handle->name = "rfkill";
233
234 /* causes rfkill_start() to be called */
235 error = input_register_handle(handle);
236 if (error)
237 goto err_free_handle;
238
239 error = input_open_device(handle);
240 if (error)
241 goto err_unregister_handle;
242
243 return 0;
244
245 err_unregister_handle:
246 input_unregister_handle(handle);
247 err_free_handle:
248 kfree(handle);
249 return error;
250}
251
252static void rfkill_start(struct input_handle *handle)
253{
254 /*
255 * Take event_lock to guard against configuration changes, we
256 * should be able to deal with concurrency with rfkill_event()
257 * just fine (which event_lock will also avoid).
258 */
259 spin_lock_irq(&handle->dev->event_lock);
260
261 if (test_bit(EV_SW, handle->dev->evbit) &&
262 test_bit(SW_RFKILL_ALL, handle->dev->swbit))
263 rfkill_schedule_evsw_rfkillall(test_bit(SW_RFKILL_ALL,
264 handle->dev->sw));
265
266 spin_unlock_irq(&handle->dev->event_lock);
267}
268
269static void rfkill_disconnect(struct input_handle *handle)
270{
271 input_close_device(handle);
272 input_unregister_handle(handle);
273 kfree(handle);
274}
275
276static const struct input_device_id rfkill_ids[] = {
277 {
278 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
279 .evbit = { BIT_MASK(EV_KEY) },
280 .keybit = { [BIT_WORD(KEY_WLAN)] = BIT_MASK(KEY_WLAN) },
281 },
282 {
283 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
284 .evbit = { BIT_MASK(EV_KEY) },
285 .keybit = { [BIT_WORD(KEY_BLUETOOTH)] = BIT_MASK(KEY_BLUETOOTH) },
286 },
287 {
288 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
289 .evbit = { BIT_MASK(EV_KEY) },
290 .keybit = { [BIT_WORD(KEY_UWB)] = BIT_MASK(KEY_UWB) },
291 },
292 {
293 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
294 .evbit = { BIT_MASK(EV_KEY) },
295 .keybit = { [BIT_WORD(KEY_WIMAX)] = BIT_MASK(KEY_WIMAX) },
296 },
297 {
298 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_SWBIT,
299 .evbit = { BIT(EV_SW) },
300 .swbit = { [BIT_WORD(SW_RFKILL_ALL)] = BIT_MASK(SW_RFKILL_ALL) },
301 },
302 { }
303};
304
305static struct input_handler rfkill_handler = {
306 .name = "rfkill",
307 .event = rfkill_event,
308 .connect = rfkill_connect,
309 .start = rfkill_start,
310 .disconnect = rfkill_disconnect,
311 .id_table = rfkill_ids,
312};
313
314int __init rfkill_handler_init(void)
315{
316 switch (rfkill_master_switch_mode) {
317 case RFKILL_INPUT_MASTER_UNBLOCKALL:
318 rfkill_master_switch_op = RFKILL_GLOBAL_OP_UNBLOCK;
319 break;
320 case RFKILL_INPUT_MASTER_RESTORE:
321 rfkill_master_switch_op = RFKILL_GLOBAL_OP_RESTORE;
322 break;
323 case RFKILL_INPUT_MASTER_UNLOCK:
324 rfkill_master_switch_op = RFKILL_GLOBAL_OP_UNLOCK;
325 break;
326 default:
327 return -EINVAL;
328 }
329
330 spin_lock_init(&rfkill_op_lock);
331
332 /* Avoid delay at first schedule */
333 rfkill_last_scheduled =
334 jiffies - msecs_to_jiffies(RFKILL_OPS_DELAY) - 1;
335 return input_register_handler(&rfkill_handler);
336}
337
338void __exit rfkill_handler_exit(void)
339{
340 input_unregister_handler(&rfkill_handler);
341 cancel_delayed_work_sync(&rfkill_op_work);
342}
diff --git a/net/rfkill/rfkill-input.c b/net/rfkill/rfkill-input.c
deleted file mode 100644
index 84efde97c5a7..000000000000
--- a/net/rfkill/rfkill-input.c
+++ /dev/null
@@ -1,459 +0,0 @@
1/*
2 * Input layer to RF Kill interface connector
3 *
4 * Copyright (c) 2007 Dmitry Torokhov
5 */
6
7/*
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published
10 * by the Free Software Foundation.
11 */
12
13#include <linux/module.h>
14#include <linux/input.h>
15#include <linux/slab.h>
16#include <linux/workqueue.h>
17#include <linux/init.h>
18#include <linux/rfkill.h>
19#include <linux/sched.h>
20
21#include "rfkill-input.h"
22
23MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>");
24MODULE_DESCRIPTION("Input layer to RF switch connector");
25MODULE_LICENSE("GPL");
26
27enum rfkill_input_master_mode {
28 RFKILL_INPUT_MASTER_DONOTHING = 0,
29 RFKILL_INPUT_MASTER_RESTORE = 1,
30 RFKILL_INPUT_MASTER_UNBLOCKALL = 2,
31 RFKILL_INPUT_MASTER_MAX, /* marker */
32};
33
34/* Delay (in ms) between consecutive switch ops */
35#define RFKILL_OPS_DELAY 200
36
37static enum rfkill_input_master_mode rfkill_master_switch_mode =
38 RFKILL_INPUT_MASTER_UNBLOCKALL;
39module_param_named(master_switch_mode, rfkill_master_switch_mode, uint, 0);
40MODULE_PARM_DESC(master_switch_mode,
41 "SW_RFKILL_ALL ON should: 0=do nothing; 1=restore; 2=unblock all");
42
43enum rfkill_global_sched_op {
44 RFKILL_GLOBAL_OP_EPO = 0,
45 RFKILL_GLOBAL_OP_RESTORE,
46 RFKILL_GLOBAL_OP_UNLOCK,
47 RFKILL_GLOBAL_OP_UNBLOCK,
48};
49
50/*
51 * Currently, the code marked with RFKILL_NEED_SWSET is inactive.
52 * If handling of EV_SW SW_WLAN/WWAN/BLUETOOTH/etc is needed in the
53 * future, when such events are added, that code will be necessary.
54 */
55
56struct rfkill_task {
57 struct delayed_work dwork;
58
59 /* ensures that task is serialized */
60 struct mutex mutex;
61
62 /* protects everything below */
63 spinlock_t lock;
64
65 /* pending regular switch operations (1=pending) */
66 unsigned long sw_pending[BITS_TO_LONGS(RFKILL_TYPE_MAX)];
67
68#ifdef RFKILL_NEED_SWSET
69 /* set operation pending (1=pending) */
70 unsigned long sw_setpending[BITS_TO_LONGS(RFKILL_TYPE_MAX)];
71
72 /* desired state for pending set operation (1=unblock) */
73 unsigned long sw_newstate[BITS_TO_LONGS(RFKILL_TYPE_MAX)];
74#endif
75
76 /* should the state be complemented (1=yes) */
77 unsigned long sw_togglestate[BITS_TO_LONGS(RFKILL_TYPE_MAX)];
78
79 bool global_op_pending;
80 enum rfkill_global_sched_op op;
81
82 /* last time it was scheduled */
83 unsigned long last_scheduled;
84};
85
86static void __rfkill_handle_global_op(enum rfkill_global_sched_op op)
87{
88 unsigned int i;
89
90 switch (op) {
91 case RFKILL_GLOBAL_OP_EPO:
92 rfkill_epo();
93 break;
94 case RFKILL_GLOBAL_OP_RESTORE:
95 rfkill_restore_states();
96 break;
97 case RFKILL_GLOBAL_OP_UNLOCK:
98 rfkill_remove_epo_lock();
99 break;
100 case RFKILL_GLOBAL_OP_UNBLOCK:
101 rfkill_remove_epo_lock();
102 for (i = 0; i < RFKILL_TYPE_MAX; i++)
103 rfkill_switch_all(i, RFKILL_STATE_UNBLOCKED);
104 break;
105 default:
106 /* memory corruption or bug, fail safely */
107 rfkill_epo();
108 WARN(1, "Unknown requested operation %d! "
109 "rfkill Emergency Power Off activated\n",
110 op);
111 }
112}
113
114#ifdef RFKILL_NEED_SWSET
115static void __rfkill_handle_normal_op(const enum rfkill_type type,
116 const bool sp, const bool s, const bool c)
117{
118 enum rfkill_state state;
119
120 if (sp)
121 state = (s) ? RFKILL_STATE_UNBLOCKED :
122 RFKILL_STATE_SOFT_BLOCKED;
123 else
124 state = rfkill_get_global_state(type);
125
126 if (c)
127 state = rfkill_state_complement(state);
128
129 rfkill_switch_all(type, state);
130}
131#else
132static void __rfkill_handle_normal_op(const enum rfkill_type type,
133 const bool c)
134{
135 enum rfkill_state state;
136
137 state = rfkill_get_global_state(type);
138 if (c)
139 state = rfkill_state_complement(state);
140
141 rfkill_switch_all(type, state);
142}
143#endif
144
145static void rfkill_task_handler(struct work_struct *work)
146{
147 struct rfkill_task *task = container_of(work,
148 struct rfkill_task, dwork.work);
149 bool doit = true;
150
151 mutex_lock(&task->mutex);
152
153 spin_lock_irq(&task->lock);
154 while (doit) {
155 if (task->global_op_pending) {
156 enum rfkill_global_sched_op op = task->op;
157 task->global_op_pending = false;
158 memset(task->sw_pending, 0, sizeof(task->sw_pending));
159 spin_unlock_irq(&task->lock);
160
161 __rfkill_handle_global_op(op);
162
163 /* make sure we do at least one pass with
164 * !task->global_op_pending */
165 spin_lock_irq(&task->lock);
166 continue;
167 } else if (!rfkill_is_epo_lock_active()) {
168 unsigned int i = 0;
169
170 while (!task->global_op_pending &&
171 i < RFKILL_TYPE_MAX) {
172 if (test_and_clear_bit(i, task->sw_pending)) {
173 bool c;
174#ifdef RFKILL_NEED_SWSET
175 bool sp, s;
176 sp = test_and_clear_bit(i,
177 task->sw_setpending);
178 s = test_bit(i, task->sw_newstate);
179#endif
180 c = test_and_clear_bit(i,
181 task->sw_togglestate);
182 spin_unlock_irq(&task->lock);
183
184#ifdef RFKILL_NEED_SWSET
185 __rfkill_handle_normal_op(i, sp, s, c);
186#else
187 __rfkill_handle_normal_op(i, c);
188#endif
189
190 spin_lock_irq(&task->lock);
191 }
192 i++;
193 }
194 }
195 doit = task->global_op_pending;
196 }
197 spin_unlock_irq(&task->lock);
198
199 mutex_unlock(&task->mutex);
200}
201
202static struct rfkill_task rfkill_task = {
203 .dwork = __DELAYED_WORK_INITIALIZER(rfkill_task.dwork,
204 rfkill_task_handler),
205 .mutex = __MUTEX_INITIALIZER(rfkill_task.mutex),
206 .lock = __SPIN_LOCK_UNLOCKED(rfkill_task.lock),
207};
208
209static unsigned long rfkill_ratelimit(const unsigned long last)
210{
211 const unsigned long delay = msecs_to_jiffies(RFKILL_OPS_DELAY);
212 return (time_after(jiffies, last + delay)) ? 0 : delay;
213}
214
215static void rfkill_schedule_ratelimited(void)
216{
217 if (!delayed_work_pending(&rfkill_task.dwork)) {
218 schedule_delayed_work(&rfkill_task.dwork,
219 rfkill_ratelimit(rfkill_task.last_scheduled));
220 rfkill_task.last_scheduled = jiffies;
221 }
222}
223
224static void rfkill_schedule_global_op(enum rfkill_global_sched_op op)
225{
226 unsigned long flags;
227
228 spin_lock_irqsave(&rfkill_task.lock, flags);
229 rfkill_task.op = op;
230 rfkill_task.global_op_pending = true;
231 if (op == RFKILL_GLOBAL_OP_EPO && !rfkill_is_epo_lock_active()) {
232 /* bypass the limiter for EPO */
233 cancel_delayed_work(&rfkill_task.dwork);
234 schedule_delayed_work(&rfkill_task.dwork, 0);
235 rfkill_task.last_scheduled = jiffies;
236 } else
237 rfkill_schedule_ratelimited();
238 spin_unlock_irqrestore(&rfkill_task.lock, flags);
239}
240
241#ifdef RFKILL_NEED_SWSET
242/* Use this if you need to add EV_SW SW_WLAN/WWAN/BLUETOOTH/etc handling */
243
244static void rfkill_schedule_set(enum rfkill_type type,
245 enum rfkill_state desired_state)
246{
247 unsigned long flags;
248
249 if (rfkill_is_epo_lock_active())
250 return;
251
252 spin_lock_irqsave(&rfkill_task.lock, flags);
253 if (!rfkill_task.global_op_pending) {
254 set_bit(type, rfkill_task.sw_pending);
255 set_bit(type, rfkill_task.sw_setpending);
256 clear_bit(type, rfkill_task.sw_togglestate);
257 if (desired_state)
258 set_bit(type, rfkill_task.sw_newstate);
259 else
260 clear_bit(type, rfkill_task.sw_newstate);
261 rfkill_schedule_ratelimited();
262 }
263 spin_unlock_irqrestore(&rfkill_task.lock, flags);
264}
265#endif
266
267static void rfkill_schedule_toggle(enum rfkill_type type)
268{
269 unsigned long flags;
270
271 if (rfkill_is_epo_lock_active())
272 return;
273
274 spin_lock_irqsave(&rfkill_task.lock, flags);
275 if (!rfkill_task.global_op_pending) {
276 set_bit(type, rfkill_task.sw_pending);
277 change_bit(type, rfkill_task.sw_togglestate);
278 rfkill_schedule_ratelimited();
279 }
280 spin_unlock_irqrestore(&rfkill_task.lock, flags);
281}
282
283static void rfkill_schedule_evsw_rfkillall(int state)
284{
285 if (state) {
286 switch (rfkill_master_switch_mode) {
287 case RFKILL_INPUT_MASTER_UNBLOCKALL:
288 rfkill_schedule_global_op(RFKILL_GLOBAL_OP_UNBLOCK);
289 break;
290 case RFKILL_INPUT_MASTER_RESTORE:
291 rfkill_schedule_global_op(RFKILL_GLOBAL_OP_RESTORE);
292 break;
293 case RFKILL_INPUT_MASTER_DONOTHING:
294 rfkill_schedule_global_op(RFKILL_GLOBAL_OP_UNLOCK);
295 break;
296 default:
297 /* memory corruption or driver bug! fail safely */
298 rfkill_schedule_global_op(RFKILL_GLOBAL_OP_EPO);
299 WARN(1, "Unknown rfkill_master_switch_mode (%d), "
300 "driver bug or memory corruption detected!\n",
301 rfkill_master_switch_mode);
302 break;
303 }
304 } else
305 rfkill_schedule_global_op(RFKILL_GLOBAL_OP_EPO);
306}
307
308static void rfkill_event(struct input_handle *handle, unsigned int type,
309 unsigned int code, int data)
310{
311 if (type == EV_KEY && data == 1) {
312 enum rfkill_type t;
313
314 switch (code) {
315 case KEY_WLAN:
316 t = RFKILL_TYPE_WLAN;
317 break;
318 case KEY_BLUETOOTH:
319 t = RFKILL_TYPE_BLUETOOTH;
320 break;
321 case KEY_UWB:
322 t = RFKILL_TYPE_UWB;
323 break;
324 case KEY_WIMAX:
325 t = RFKILL_TYPE_WIMAX;
326 break;
327 default:
328 return;
329 }
330 rfkill_schedule_toggle(t);
331 return;
332 } else if (type == EV_SW) {
333 switch (code) {
334 case SW_RFKILL_ALL:
335 rfkill_schedule_evsw_rfkillall(data);
336 return;
337 default:
338 return;
339 }
340 }
341}
342
343static int rfkill_connect(struct input_handler *handler, struct input_dev *dev,
344 const struct input_device_id *id)
345{
346 struct input_handle *handle;
347 int error;
348
349 handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
350 if (!handle)
351 return -ENOMEM;
352
353 handle->dev = dev;
354 handle->handler = handler;
355 handle->name = "rfkill";
356
357 /* causes rfkill_start() to be called */
358 error = input_register_handle(handle);
359 if (error)
360 goto err_free_handle;
361
362 error = input_open_device(handle);
363 if (error)
364 goto err_unregister_handle;
365
366 return 0;
367
368 err_unregister_handle:
369 input_unregister_handle(handle);
370 err_free_handle:
371 kfree(handle);
372 return error;
373}
374
375static void rfkill_start(struct input_handle *handle)
376{
377 /* Take event_lock to guard against configuration changes, we
378 * should be able to deal with concurrency with rfkill_event()
379 * just fine (which event_lock will also avoid). */
380 spin_lock_irq(&handle->dev->event_lock);
381
382 if (test_bit(EV_SW, handle->dev->evbit)) {
383 if (test_bit(SW_RFKILL_ALL, handle->dev->swbit))
384 rfkill_schedule_evsw_rfkillall(test_bit(SW_RFKILL_ALL,
385 handle->dev->sw));
386 /* add resync for further EV_SW events here */
387 }
388
389 spin_unlock_irq(&handle->dev->event_lock);
390}
391
392static void rfkill_disconnect(struct input_handle *handle)
393{
394 input_close_device(handle);
395 input_unregister_handle(handle);
396 kfree(handle);
397}
398
399static const struct input_device_id rfkill_ids[] = {
400 {
401 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
402 .evbit = { BIT_MASK(EV_KEY) },
403 .keybit = { [BIT_WORD(KEY_WLAN)] = BIT_MASK(KEY_WLAN) },
404 },
405 {
406 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
407 .evbit = { BIT_MASK(EV_KEY) },
408 .keybit = { [BIT_WORD(KEY_BLUETOOTH)] = BIT_MASK(KEY_BLUETOOTH) },
409 },
410 {
411 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
412 .evbit = { BIT_MASK(EV_KEY) },
413 .keybit = { [BIT_WORD(KEY_UWB)] = BIT_MASK(KEY_UWB) },
414 },
415 {
416 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
417 .evbit = { BIT_MASK(EV_KEY) },
418 .keybit = { [BIT_WORD(KEY_WIMAX)] = BIT_MASK(KEY_WIMAX) },
419 },
420 {
421 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_SWBIT,
422 .evbit = { BIT(EV_SW) },
423 .swbit = { [BIT_WORD(SW_RFKILL_ALL)] = BIT_MASK(SW_RFKILL_ALL) },
424 },
425 { }
426};
427
428static struct input_handler rfkill_handler = {
429 .event = rfkill_event,
430 .connect = rfkill_connect,
431 .disconnect = rfkill_disconnect,
432 .start = rfkill_start,
433 .name = "rfkill",
434 .id_table = rfkill_ids,
435};
436
437static int __init rfkill_handler_init(void)
438{
439 if (rfkill_master_switch_mode >= RFKILL_INPUT_MASTER_MAX)
440 return -EINVAL;
441
442 /*
443 * The penalty to not doing this is a possible RFKILL_OPS_DELAY delay
444 * at the first use. Acceptable, but if we can avoid it, why not?
445 */
446 rfkill_task.last_scheduled =
447 jiffies - msecs_to_jiffies(RFKILL_OPS_DELAY) - 1;
448 return input_register_handler(&rfkill_handler);
449}
450
451static void __exit rfkill_handler_exit(void)
452{
453 input_unregister_handler(&rfkill_handler);
454 cancel_delayed_work_sync(&rfkill_task.dwork);
455 rfkill_remove_epo_lock();
456}
457
458module_init(rfkill_handler_init);
459module_exit(rfkill_handler_exit);
diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
deleted file mode 100644
index 3eaa39403c13..000000000000
--- a/net/rfkill/rfkill.c
+++ /dev/null
@@ -1,882 +0,0 @@
1/*
2 * Copyright (C) 2006 - 2007 Ivo van Doorn
3 * Copyright (C) 2007 Dmitry Torokhov
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the
17 * Free Software Foundation, Inc.,
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/workqueue.h>
25#include <linux/capability.h>
26#include <linux/list.h>
27#include <linux/mutex.h>
28#include <linux/rfkill.h>
29
30/* Get declaration of rfkill_switch_all() to shut up sparse. */
31#include "rfkill-input.h"
32
33
34MODULE_AUTHOR("Ivo van Doorn <IvDoorn@gmail.com>");
35MODULE_VERSION("1.0");
36MODULE_DESCRIPTION("RF switch support");
37MODULE_LICENSE("GPL");
38
39static LIST_HEAD(rfkill_list); /* list of registered rf switches */
40static DEFINE_MUTEX(rfkill_global_mutex);
41
42static unsigned int rfkill_default_state = RFKILL_STATE_UNBLOCKED;
43module_param_named(default_state, rfkill_default_state, uint, 0444);
44MODULE_PARM_DESC(default_state,
45 "Default initial state for all radio types, 0 = radio off");
46
47struct rfkill_gsw_state {
48 enum rfkill_state current_state;
49 enum rfkill_state default_state;
50};
51
52static struct rfkill_gsw_state rfkill_global_states[RFKILL_TYPE_MAX];
53static unsigned long rfkill_states_lockdflt[BITS_TO_LONGS(RFKILL_TYPE_MAX)];
54static bool rfkill_epo_lock_active;
55
56
57#ifdef CONFIG_RFKILL_LEDS
58static void rfkill_led_trigger(struct rfkill *rfkill,
59 enum rfkill_state state)
60{
61 struct led_trigger *led = &rfkill->led_trigger;
62
63 if (!led->name)
64 return;
65 if (state != RFKILL_STATE_UNBLOCKED)
66 led_trigger_event(led, LED_OFF);
67 else
68 led_trigger_event(led, LED_FULL);
69}
70
71static void rfkill_led_trigger_activate(struct led_classdev *led)
72{
73 struct rfkill *rfkill = container_of(led->trigger,
74 struct rfkill, led_trigger);
75
76 rfkill_led_trigger(rfkill, rfkill->state);
77}
78#endif /* CONFIG_RFKILL_LEDS */
79
80static void rfkill_uevent(struct rfkill *rfkill)
81{
82 kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE);
83}
84
85static void update_rfkill_state(struct rfkill *rfkill)
86{
87 enum rfkill_state newstate, oldstate;
88
89 if (rfkill->get_state) {
90 mutex_lock(&rfkill->mutex);
91 if (!rfkill->get_state(rfkill->data, &newstate)) {
92 oldstate = rfkill->state;
93 rfkill->state = newstate;
94 if (oldstate != newstate)
95 rfkill_uevent(rfkill);
96 }
97 mutex_unlock(&rfkill->mutex);
98 }
99}
100
101/**
102 * rfkill_toggle_radio - wrapper for toggle_radio hook
103 * @rfkill: the rfkill struct to use
104 * @force: calls toggle_radio even if cache says it is not needed,
105 * and also makes sure notifications of the state will be
106 * sent even if it didn't change
107 * @state: the new state to call toggle_radio() with
108 *
109 * Calls rfkill->toggle_radio, enforcing the API for toggle_radio
110 * calls and handling all the red tape such as issuing notifications
111 * if the call is successful.
112 *
113 * Suspended devices are not touched at all, and -EAGAIN is returned.
114 *
115 * Note that the @force parameter cannot override a (possibly cached)
116 * state of RFKILL_STATE_HARD_BLOCKED. Any device making use of
117 * RFKILL_STATE_HARD_BLOCKED implements either get_state() or
118 * rfkill_force_state(), so the cache either is bypassed or valid.
119 *
120 * Note that we do call toggle_radio for RFKILL_STATE_SOFT_BLOCKED
121 * even if the radio is in RFKILL_STATE_HARD_BLOCKED state, so as to
122 * give the driver a hint that it should double-BLOCK the transmitter.
123 *
124 * Caller must have acquired rfkill->mutex.
125 */
126static int rfkill_toggle_radio(struct rfkill *rfkill,
127 enum rfkill_state state,
128 int force)
129{
130 int retval = 0;
131 enum rfkill_state oldstate, newstate;
132
133 if (unlikely(rfkill->dev.power.power_state.event & PM_EVENT_SLEEP))
134 return -EBUSY;
135
136 oldstate = rfkill->state;
137
138 if (rfkill->get_state && !force &&
139 !rfkill->get_state(rfkill->data, &newstate))
140 rfkill->state = newstate;
141
142 switch (state) {
143 case RFKILL_STATE_HARD_BLOCKED:
144 /* typically happens when refreshing hardware state,
145 * such as on resume */
146 state = RFKILL_STATE_SOFT_BLOCKED;
147 break;
148 case RFKILL_STATE_UNBLOCKED:
149 /* force can't override this, only rfkill_force_state() can */
150 if (rfkill->state == RFKILL_STATE_HARD_BLOCKED)
151 return -EPERM;
152 break;
153 case RFKILL_STATE_SOFT_BLOCKED:
154 /* nothing to do, we want to give drivers the hint to double
155 * BLOCK even a transmitter that is already in state
156 * RFKILL_STATE_HARD_BLOCKED */
157 break;
158 default:
159 WARN(1, KERN_WARNING
160 "rfkill: illegal state %d passed as parameter "
161 "to rfkill_toggle_radio\n", state);
162 return -EINVAL;
163 }
164
165 if (force || state != rfkill->state) {
166 retval = rfkill->toggle_radio(rfkill->data, state);
167 /* never allow a HARD->SOFT downgrade! */
168 if (!retval && rfkill->state != RFKILL_STATE_HARD_BLOCKED)
169 rfkill->state = state;
170 }
171
172 if (force || rfkill->state != oldstate)
173 rfkill_uevent(rfkill);
174
175 return retval;
176}
177
178/**
179 * __rfkill_switch_all - Toggle state of all switches of given type
180 * @type: type of interfaces to be affected
181 * @state: the new state
182 *
183 * This function toggles the state of all switches of given type,
184 * unless a specific switch is claimed by userspace (in which case,
185 * that switch is left alone) or suspended.
186 *
187 * Caller must have acquired rfkill_global_mutex.
188 */
189static void __rfkill_switch_all(const enum rfkill_type type,
190 const enum rfkill_state state)
191{
192 struct rfkill *rfkill;
193
194 if (WARN((state >= RFKILL_STATE_MAX || type >= RFKILL_TYPE_MAX),
195 KERN_WARNING
196 "rfkill: illegal state %d or type %d "
197 "passed as parameter to __rfkill_switch_all\n",
198 state, type))
199 return;
200
201 rfkill_global_states[type].current_state = state;
202 list_for_each_entry(rfkill, &rfkill_list, node) {
203 if ((!rfkill->user_claim) && (rfkill->type == type)) {
204 mutex_lock(&rfkill->mutex);
205 rfkill_toggle_radio(rfkill, state, 0);
206 mutex_unlock(&rfkill->mutex);
207 }
208 }
209}
210
211/**
212 * rfkill_switch_all - Toggle state of all switches of given type
213 * @type: type of interfaces to be affected
214 * @state: the new state
215 *
216 * Acquires rfkill_global_mutex and calls __rfkill_switch_all(@type, @state).
217 * Please refer to __rfkill_switch_all() for details.
218 *
219 * Does nothing if the EPO lock is active.
220 */
221void rfkill_switch_all(enum rfkill_type type, enum rfkill_state state)
222{
223 mutex_lock(&rfkill_global_mutex);
224 if (!rfkill_epo_lock_active)
225 __rfkill_switch_all(type, state);
226 mutex_unlock(&rfkill_global_mutex);
227}
228EXPORT_SYMBOL(rfkill_switch_all);
229
230/**
231 * rfkill_epo - emergency power off all transmitters
232 *
233 * This kicks all non-suspended rfkill devices to RFKILL_STATE_SOFT_BLOCKED,
234 * ignoring everything in its path but rfkill_global_mutex and rfkill->mutex.
235 *
236 * The global state before the EPO is saved and can be restored later
237 * using rfkill_restore_states().
238 */
239void rfkill_epo(void)
240{
241 struct rfkill *rfkill;
242 int i;
243
244 mutex_lock(&rfkill_global_mutex);
245
246 rfkill_epo_lock_active = true;
247 list_for_each_entry(rfkill, &rfkill_list, node) {
248 mutex_lock(&rfkill->mutex);
249 rfkill_toggle_radio(rfkill, RFKILL_STATE_SOFT_BLOCKED, 1);
250 mutex_unlock(&rfkill->mutex);
251 }
252 for (i = 0; i < RFKILL_TYPE_MAX; i++) {
253 rfkill_global_states[i].default_state =
254 rfkill_global_states[i].current_state;
255 rfkill_global_states[i].current_state =
256 RFKILL_STATE_SOFT_BLOCKED;
257 }
258 mutex_unlock(&rfkill_global_mutex);
259}
260EXPORT_SYMBOL_GPL(rfkill_epo);
261
262/**
263 * rfkill_restore_states - restore global states
264 *
265 * Restore (and sync switches to) the global state from the
266 * states in rfkill_default_states. This can undo the effects of
267 * a call to rfkill_epo().
268 */
269void rfkill_restore_states(void)
270{
271 int i;
272
273 mutex_lock(&rfkill_global_mutex);
274
275 rfkill_epo_lock_active = false;
276 for (i = 0; i < RFKILL_TYPE_MAX; i++)
277 __rfkill_switch_all(i, rfkill_global_states[i].default_state);
278 mutex_unlock(&rfkill_global_mutex);
279}
280EXPORT_SYMBOL_GPL(rfkill_restore_states);
281
282/**
283 * rfkill_remove_epo_lock - unlock state changes
284 *
285 * Used by rfkill-input manually unlock state changes, when
286 * the EPO switch is deactivated.
287 */
288void rfkill_remove_epo_lock(void)
289{
290 mutex_lock(&rfkill_global_mutex);
291 rfkill_epo_lock_active = false;
292 mutex_unlock(&rfkill_global_mutex);
293}
294EXPORT_SYMBOL_GPL(rfkill_remove_epo_lock);
295
296/**
297 * rfkill_is_epo_lock_active - returns true EPO is active
298 *
299 * Returns 0 (false) if there is NOT an active EPO contidion,
300 * and 1 (true) if there is an active EPO contition, which
301 * locks all radios in one of the BLOCKED states.
302 *
303 * Can be called in atomic context.
304 */
305bool rfkill_is_epo_lock_active(void)
306{
307 return rfkill_epo_lock_active;
308}
309EXPORT_SYMBOL_GPL(rfkill_is_epo_lock_active);
310
311/**
312 * rfkill_get_global_state - returns global state for a type
313 * @type: the type to get the global state of
314 *
315 * Returns the current global state for a given wireless
316 * device type.
317 */
318enum rfkill_state rfkill_get_global_state(const enum rfkill_type type)
319{
320 return rfkill_global_states[type].current_state;
321}
322EXPORT_SYMBOL_GPL(rfkill_get_global_state);
323
324/**
325 * rfkill_force_state - Force the internal rfkill radio state
326 * @rfkill: pointer to the rfkill class to modify.
327 * @state: the current radio state the class should be forced to.
328 *
329 * This function updates the internal state of the radio cached
330 * by the rfkill class. It should be used when the driver gets
331 * a notification by the firmware/hardware of the current *real*
332 * state of the radio rfkill switch.
333 *
334 * Devices which are subject to external changes on their rfkill
335 * state (such as those caused by a hardware rfkill line) MUST
336 * have their driver arrange to call rfkill_force_state() as soon
337 * as possible after such a change.
338 *
339 * This function may not be called from an atomic context.
340 */
341int rfkill_force_state(struct rfkill *rfkill, enum rfkill_state state)
342{
343 enum rfkill_state oldstate;
344
345 BUG_ON(!rfkill);
346 if (WARN((state >= RFKILL_STATE_MAX),
347 KERN_WARNING
348 "rfkill: illegal state %d passed as parameter "
349 "to rfkill_force_state\n", state))
350 return -EINVAL;
351
352 mutex_lock(&rfkill->mutex);
353
354 oldstate = rfkill->state;
355 rfkill->state = state;
356
357 if (state != oldstate)
358 rfkill_uevent(rfkill);
359
360 mutex_unlock(&rfkill->mutex);
361
362 return 0;
363}
364EXPORT_SYMBOL(rfkill_force_state);
365
366static ssize_t rfkill_name_show(struct device *dev,
367 struct device_attribute *attr,
368 char *buf)
369{
370 struct rfkill *rfkill = to_rfkill(dev);
371
372 return sprintf(buf, "%s\n", rfkill->name);
373}
374
375static const char *rfkill_get_type_str(enum rfkill_type type)
376{
377 switch (type) {
378 case RFKILL_TYPE_WLAN:
379 return "wlan";
380 case RFKILL_TYPE_BLUETOOTH:
381 return "bluetooth";
382 case RFKILL_TYPE_UWB:
383 return "ultrawideband";
384 case RFKILL_TYPE_WIMAX:
385 return "wimax";
386 case RFKILL_TYPE_WWAN:
387 return "wwan";
388 default:
389 BUG();
390 }
391}
392
393static ssize_t rfkill_type_show(struct device *dev,
394 struct device_attribute *attr,
395 char *buf)
396{
397 struct rfkill *rfkill = to_rfkill(dev);
398
399 return sprintf(buf, "%s\n", rfkill_get_type_str(rfkill->type));
400}
401
402static ssize_t rfkill_state_show(struct device *dev,
403 struct device_attribute *attr,
404 char *buf)
405{
406 struct rfkill *rfkill = to_rfkill(dev);
407
408 update_rfkill_state(rfkill);
409 return sprintf(buf, "%d\n", rfkill->state);
410}
411
412static ssize_t rfkill_state_store(struct device *dev,
413 struct device_attribute *attr,
414 const char *buf, size_t count)
415{
416 struct rfkill *rfkill = to_rfkill(dev);
417 unsigned long state;
418 int error;
419
420 if (!capable(CAP_NET_ADMIN))
421 return -EPERM;
422
423 error = strict_strtoul(buf, 0, &state);
424 if (error)
425 return error;
426
427 /* RFKILL_STATE_HARD_BLOCKED is illegal here... */
428 if (state != RFKILL_STATE_UNBLOCKED &&
429 state != RFKILL_STATE_SOFT_BLOCKED)
430 return -EINVAL;
431
432 error = mutex_lock_killable(&rfkill->mutex);
433 if (error)
434 return error;
435
436 if (!rfkill_epo_lock_active)
437 error = rfkill_toggle_radio(rfkill, state, 0);
438 else
439 error = -EPERM;
440
441 mutex_unlock(&rfkill->mutex);
442
443 return error ? error : count;
444}
445
446static ssize_t rfkill_claim_show(struct device *dev,
447 struct device_attribute *attr,
448 char *buf)
449{
450 struct rfkill *rfkill = to_rfkill(dev);
451
452 return sprintf(buf, "%d\n", rfkill->user_claim);
453}
454
455static ssize_t rfkill_claim_store(struct device *dev,
456 struct device_attribute *attr,
457 const char *buf, size_t count)
458{
459 struct rfkill *rfkill = to_rfkill(dev);
460 unsigned long claim_tmp;
461 bool claim;
462 int error;
463
464 if (!capable(CAP_NET_ADMIN))
465 return -EPERM;
466
467 if (rfkill->user_claim_unsupported)
468 return -EOPNOTSUPP;
469
470 error = strict_strtoul(buf, 0, &claim_tmp);
471 if (error)
472 return error;
473 claim = !!claim_tmp;
474
475 /*
476 * Take the global lock to make sure the kernel is not in
477 * the middle of rfkill_switch_all
478 */
479 error = mutex_lock_killable(&rfkill_global_mutex);
480 if (error)
481 return error;
482
483 if (rfkill->user_claim != claim) {
484 if (!claim && !rfkill_epo_lock_active) {
485 mutex_lock(&rfkill->mutex);
486 rfkill_toggle_radio(rfkill,
487 rfkill_global_states[rfkill->type].current_state,
488 0);
489 mutex_unlock(&rfkill->mutex);
490 }
491 rfkill->user_claim = claim;
492 }
493
494 mutex_unlock(&rfkill_global_mutex);
495
496 return error ? error : count;
497}
498
499static struct device_attribute rfkill_dev_attrs[] = {
500 __ATTR(name, S_IRUGO, rfkill_name_show, NULL),
501 __ATTR(type, S_IRUGO, rfkill_type_show, NULL),
502 __ATTR(state, S_IRUGO|S_IWUSR, rfkill_state_show, rfkill_state_store),
503 __ATTR(claim, S_IRUGO|S_IWUSR, rfkill_claim_show, rfkill_claim_store),
504 __ATTR_NULL
505};
506
507static void rfkill_release(struct device *dev)
508{
509 struct rfkill *rfkill = to_rfkill(dev);
510
511 kfree(rfkill);
512 module_put(THIS_MODULE);
513}
514
515#ifdef CONFIG_PM
516static int rfkill_suspend(struct device *dev, pm_message_t state)
517{
518 struct rfkill *rfkill = to_rfkill(dev);
519
520 /* mark class device as suspended */
521 if (dev->power.power_state.event != state.event)
522 dev->power.power_state = state;
523
524 /* store state for the resume handler */
525 rfkill->state_for_resume = rfkill->state;
526
527 return 0;
528}
529
530static int rfkill_resume(struct device *dev)
531{
532 struct rfkill *rfkill = to_rfkill(dev);
533 enum rfkill_state newstate;
534
535 if (dev->power.power_state.event != PM_EVENT_ON) {
536 mutex_lock(&rfkill->mutex);
537
538 dev->power.power_state.event = PM_EVENT_ON;
539
540 /*
541 * rfkill->state could have been modified before we got
542 * called, and won't be updated by rfkill_toggle_radio()
543 * in force mode. Sync it FIRST.
544 */
545 if (rfkill->get_state &&
546 !rfkill->get_state(rfkill->data, &newstate))
547 rfkill->state = newstate;
548
549 /*
550 * If we are under EPO, kick transmitter offline,
551 * otherwise restore to pre-suspend state.
552 *
553 * Issue a notification in any case
554 */
555 rfkill_toggle_radio(rfkill,
556 rfkill_epo_lock_active ?
557 RFKILL_STATE_SOFT_BLOCKED :
558 rfkill->state_for_resume,
559 1);
560
561 mutex_unlock(&rfkill->mutex);
562 }
563
564 return 0;
565}
566#else
567#define rfkill_suspend NULL
568#define rfkill_resume NULL
569#endif
570
571static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
572{
573 struct rfkill *rfkill = to_rfkill(dev);
574 int error;
575
576 error = add_uevent_var(env, "RFKILL_NAME=%s", rfkill->name);
577 if (error)
578 return error;
579 error = add_uevent_var(env, "RFKILL_TYPE=%s",
580 rfkill_get_type_str(rfkill->type));
581 if (error)
582 return error;
583 error = add_uevent_var(env, "RFKILL_STATE=%d", rfkill->state);
584 return error;
585}
586
587static struct class rfkill_class = {
588 .name = "rfkill",
589 .dev_release = rfkill_release,
590 .dev_attrs = rfkill_dev_attrs,
591 .suspend = rfkill_suspend,
592 .resume = rfkill_resume,
593 .dev_uevent = rfkill_dev_uevent,
594};
595
596static int rfkill_check_duplicity(const struct rfkill *rfkill)
597{
598 struct rfkill *p;
599 unsigned long seen[BITS_TO_LONGS(RFKILL_TYPE_MAX)];
600
601 memset(seen, 0, sizeof(seen));
602
603 list_for_each_entry(p, &rfkill_list, node) {
604 if (WARN((p == rfkill), KERN_WARNING
605 "rfkill: illegal attempt to register "
606 "an already registered rfkill struct\n"))
607 return -EEXIST;
608 set_bit(p->type, seen);
609 }
610
611 /* 0: first switch of its kind */
612 return (test_bit(rfkill->type, seen)) ? 1 : 0;
613}
614
615static int rfkill_add_switch(struct rfkill *rfkill)
616{
617 int error;
618
619 mutex_lock(&rfkill_global_mutex);
620
621 error = rfkill_check_duplicity(rfkill);
622 if (error < 0)
623 goto unlock_out;
624
625 if (!error) {
626 /* lock default after first use */
627 set_bit(rfkill->type, rfkill_states_lockdflt);
628 rfkill_global_states[rfkill->type].current_state =
629 rfkill_global_states[rfkill->type].default_state;
630 }
631
632 rfkill_toggle_radio(rfkill,
633 rfkill_global_states[rfkill->type].current_state,
634 0);
635
636 list_add_tail(&rfkill->node, &rfkill_list);
637
638 error = 0;
639unlock_out:
640 mutex_unlock(&rfkill_global_mutex);
641
642 return error;
643}
644
645static void rfkill_remove_switch(struct rfkill *rfkill)
646{
647 mutex_lock(&rfkill_global_mutex);
648 list_del_init(&rfkill->node);
649 mutex_unlock(&rfkill_global_mutex);
650
651 mutex_lock(&rfkill->mutex);
652 rfkill_toggle_radio(rfkill, RFKILL_STATE_SOFT_BLOCKED, 1);
653 mutex_unlock(&rfkill->mutex);
654}
655
656/**
657 * rfkill_allocate - allocate memory for rfkill structure.
658 * @parent: device that has rf switch on it
659 * @type: type of the switch (RFKILL_TYPE_*)
660 *
661 * This function should be called by the network driver when it needs
662 * rfkill structure. Once the structure is allocated the driver should
663 * finish its initialization by setting the name, private data, enable_radio
664 * and disable_radio methods and then register it with rfkill_register().
665 *
666 * NOTE: If registration fails the structure shoudl be freed by calling
667 * rfkill_free() otherwise rfkill_unregister() should be used.
668 */
669struct rfkill * __must_check rfkill_allocate(struct device *parent,
670 enum rfkill_type type)
671{
672 struct rfkill *rfkill;
673 struct device *dev;
674
675 if (WARN((type >= RFKILL_TYPE_MAX),
676 KERN_WARNING
677 "rfkill: illegal type %d passed as parameter "
678 "to rfkill_allocate\n", type))
679 return NULL;
680
681 rfkill = kzalloc(sizeof(struct rfkill), GFP_KERNEL);
682 if (!rfkill)
683 return NULL;
684
685 mutex_init(&rfkill->mutex);
686 INIT_LIST_HEAD(&rfkill->node);
687 rfkill->type = type;
688
689 dev = &rfkill->dev;
690 dev->class = &rfkill_class;
691 dev->parent = parent;
692 device_initialize(dev);
693
694 __module_get(THIS_MODULE);
695
696 return rfkill;
697}
698EXPORT_SYMBOL(rfkill_allocate);
699
700/**
701 * rfkill_free - Mark rfkill structure for deletion
702 * @rfkill: rfkill structure to be destroyed
703 *
704 * Decrements reference count of the rfkill structure so it is destroyed.
705 * Note that rfkill_free() should _not_ be called after rfkill_unregister().
706 */
707void rfkill_free(struct rfkill *rfkill)
708{
709 if (rfkill)
710 put_device(&rfkill->dev);
711}
712EXPORT_SYMBOL(rfkill_free);
713
714static void rfkill_led_trigger_register(struct rfkill *rfkill)
715{
716#ifdef CONFIG_RFKILL_LEDS
717 int error;
718
719 if (!rfkill->led_trigger.name)
720 rfkill->led_trigger.name = dev_name(&rfkill->dev);
721 if (!rfkill->led_trigger.activate)
722 rfkill->led_trigger.activate = rfkill_led_trigger_activate;
723 error = led_trigger_register(&rfkill->led_trigger);
724 if (error)
725 rfkill->led_trigger.name = NULL;
726#endif /* CONFIG_RFKILL_LEDS */
727}
728
729static void rfkill_led_trigger_unregister(struct rfkill *rfkill)
730{
731#ifdef CONFIG_RFKILL_LEDS
732 if (rfkill->led_trigger.name) {
733 led_trigger_unregister(&rfkill->led_trigger);
734 rfkill->led_trigger.name = NULL;
735 }
736#endif
737}
738
739/**
740 * rfkill_register - Register a rfkill structure.
741 * @rfkill: rfkill structure to be registered
742 *
743 * This function should be called by the network driver when the rfkill
744 * structure needs to be registered. Immediately from registration the
745 * switch driver should be able to service calls to toggle_radio.
746 */
747int __must_check rfkill_register(struct rfkill *rfkill)
748{
749 static atomic_t rfkill_no = ATOMIC_INIT(0);
750 struct device *dev = &rfkill->dev;
751 int error;
752
753 if (WARN((!rfkill || !rfkill->toggle_radio ||
754 rfkill->type >= RFKILL_TYPE_MAX ||
755 rfkill->state >= RFKILL_STATE_MAX),
756 KERN_WARNING
757 "rfkill: attempt to register a "
758 "badly initialized rfkill struct\n"))
759 return -EINVAL;
760
761 dev_set_name(dev, "rfkill%ld", (long)atomic_inc_return(&rfkill_no) - 1);
762
763 rfkill_led_trigger_register(rfkill);
764
765 error = rfkill_add_switch(rfkill);
766 if (error) {
767 rfkill_led_trigger_unregister(rfkill);
768 return error;
769 }
770
771 error = device_add(dev);
772 if (error) {
773 rfkill_remove_switch(rfkill);
774 rfkill_led_trigger_unregister(rfkill);
775 return error;
776 }
777
778 return 0;
779}
780EXPORT_SYMBOL(rfkill_register);
781
782/**
783 * rfkill_unregister - Unregister a rfkill structure.
784 * @rfkill: rfkill structure to be unregistered
785 *
786 * This function should be called by the network driver during device
787 * teardown to destroy rfkill structure. Note that rfkill_free() should
788 * _not_ be called after rfkill_unregister().
789 */
790void rfkill_unregister(struct rfkill *rfkill)
791{
792 BUG_ON(!rfkill);
793 device_del(&rfkill->dev);
794 rfkill_remove_switch(rfkill);
795 rfkill_led_trigger_unregister(rfkill);
796 put_device(&rfkill->dev);
797}
798EXPORT_SYMBOL(rfkill_unregister);
799
800/**
801 * rfkill_set_default - set initial value for a switch type
802 * @type - the type of switch to set the default state of
803 * @state - the new default state for that group of switches
804 *
805 * Sets the initial state rfkill should use for a given type.
806 * The following initial states are allowed: RFKILL_STATE_SOFT_BLOCKED
807 * and RFKILL_STATE_UNBLOCKED.
808 *
809 * This function is meant to be used by platform drivers for platforms
810 * that can save switch state across power down/reboot.
811 *
812 * The default state for each switch type can be changed exactly once.
813 * After a switch of that type is registered, the default state cannot
814 * be changed anymore. This guards against multiple drivers it the
815 * same platform trying to set the initial switch default state, which
816 * is not allowed.
817 *
818 * Returns -EPERM if the state has already been set once or is in use,
819 * so drivers likely want to either ignore or at most printk(KERN_NOTICE)
820 * if this function returns -EPERM.
821 *
822 * Returns 0 if the new default state was set, or an error if it
823 * could not be set.
824 */
825int rfkill_set_default(enum rfkill_type type, enum rfkill_state state)
826{
827 int error;
828
829 if (WARN((type >= RFKILL_TYPE_MAX ||
830 (state != RFKILL_STATE_SOFT_BLOCKED &&
831 state != RFKILL_STATE_UNBLOCKED)),
832 KERN_WARNING
833 "rfkill: illegal state %d or type %d passed as "
834 "parameter to rfkill_set_default\n", state, type))
835 return -EINVAL;
836
837 mutex_lock(&rfkill_global_mutex);
838
839 if (!test_and_set_bit(type, rfkill_states_lockdflt)) {
840 rfkill_global_states[type].default_state = state;
841 rfkill_global_states[type].current_state = state;
842 error = 0;
843 } else
844 error = -EPERM;
845
846 mutex_unlock(&rfkill_global_mutex);
847 return error;
848}
849EXPORT_SYMBOL_GPL(rfkill_set_default);
850
851/*
852 * Rfkill module initialization/deinitialization.
853 */
854static int __init rfkill_init(void)
855{
856 int error;
857 int i;
858
859 /* RFKILL_STATE_HARD_BLOCKED is illegal here... */
860 if (rfkill_default_state != RFKILL_STATE_SOFT_BLOCKED &&
861 rfkill_default_state != RFKILL_STATE_UNBLOCKED)
862 return -EINVAL;
863
864 for (i = 0; i < RFKILL_TYPE_MAX; i++)
865 rfkill_global_states[i].default_state = rfkill_default_state;
866
867 error = class_register(&rfkill_class);
868 if (error) {
869 printk(KERN_ERR "rfkill: unable to register rfkill class\n");
870 return error;
871 }
872
873 return 0;
874}
875
876static void __exit rfkill_exit(void)
877{
878 class_unregister(&rfkill_class);
879}
880
881subsys_initcall(rfkill_init);
882module_exit(rfkill_exit);
diff --git a/net/rfkill/rfkill-input.h b/net/rfkill/rfkill.h
index fe8df6b5b935..d1117cb6e4de 100644
--- a/net/rfkill/rfkill-input.h
+++ b/net/rfkill/rfkill.h
@@ -1,5 +1,6 @@
1/* 1/*
2 * Copyright (C) 2007 Ivo van Doorn 2 * Copyright (C) 2007 Ivo van Doorn
3 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
3 */ 4 */
4 5
5/* 6/*
@@ -11,11 +12,16 @@
11#ifndef __RFKILL_INPUT_H 12#ifndef __RFKILL_INPUT_H
12#define __RFKILL_INPUT_H 13#define __RFKILL_INPUT_H
13 14
14void rfkill_switch_all(enum rfkill_type type, enum rfkill_state state); 15/* core code */
16void rfkill_switch_all(const enum rfkill_type type, bool blocked);
15void rfkill_epo(void); 17void rfkill_epo(void);
16void rfkill_restore_states(void); 18void rfkill_restore_states(void);
17void rfkill_remove_epo_lock(void); 19void rfkill_remove_epo_lock(void);
18bool rfkill_is_epo_lock_active(void); 20bool rfkill_is_epo_lock_active(void);
19enum rfkill_state rfkill_get_global_state(const enum rfkill_type type); 21bool rfkill_get_global_sw_state(const enum rfkill_type type);
22
23/* input handler */
24int rfkill_handler_init(void);
25void rfkill_handler_exit(void);
20 26
21#endif /* __RFKILL_INPUT_H */ 27#endif /* __RFKILL_INPUT_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-08-22 09:53:46 -0400