[linux.git] / net / rfkill / input.c

/*
 * Input layer to RF Kill interface connector
 *
 * Copyright (c) 2007 Dmitry Torokhov
 * Copyright 2009 Johannes Berg <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * If you ever run into a situation in which you have a SW_ type rfkill
 * input device, then you can revive code that was removed in the patch
 * "rfkill-input: remove unused code".
 */

#include <linux/input.h>
#include <linux/slab.h>
#include <linux/moduleparam.h>
#include <linux/workqueue.h>
#include <linux/init.h>
#include <linux/rfkill.h>
#include <linux/sched.h>

#include "rfkill.h"

enum rfkill_input_master_mode {
	RFKILL_INPUT_MASTER_UNLOCK = 0,
	RFKILL_INPUT_MASTER_RESTORE = 1,
	RFKILL_INPUT_MASTER_UNBLOCKALL = 2,
	NUM_RFKILL_INPUT_MASTER_MODES
};

/* Delay (in ms) between consecutive switch ops */
#define RFKILL_OPS_DELAY 200

static enum rfkill_input_master_mode rfkill_master_switch_mode =
					RFKILL_INPUT_MASTER_UNBLOCKALL;
module_param_named(master_switch_mode, rfkill_master_switch_mode, uint, 0);
MODULE_PARM_DESC(master_switch_mode,
	"SW_RFKILL_ALL ON should: 0=do nothing (only unlock); 1=restore; 2=unblock all");

static spinlock_t rfkill_op_lock;
static bool rfkill_op_pending;
static unsigned long rfkill_sw_pending[BITS_TO_LONGS(NUM_RFKILL_TYPES)];
static unsigned long rfkill_sw_state[BITS_TO_LONGS(NUM_RFKILL_TYPES)];

enum rfkill_sched_op {
	RFKILL_GLOBAL_OP_EPO = 0,
	RFKILL_GLOBAL_OP_RESTORE,
	RFKILL_GLOBAL_OP_UNLOCK,
	RFKILL_GLOBAL_OP_UNBLOCK,
};

static enum rfkill_sched_op rfkill_master_switch_op;
static enum rfkill_sched_op rfkill_op;

static void __rfkill_handle_global_op(enum rfkill_sched_op op)
{
	unsigned int i;

	switch (op) {
	case RFKILL_GLOBAL_OP_EPO:
		rfkill_epo();
		break;
	case RFKILL_GLOBAL_OP_RESTORE:
		rfkill_restore_states();
		break;
	case RFKILL_GLOBAL_OP_UNLOCK:
		rfkill_remove_epo_lock();
		break;
	case RFKILL_GLOBAL_OP_UNBLOCK:
		rfkill_remove_epo_lock();
		for (i = 0; i < NUM_RFKILL_TYPES; i++)
			rfkill_switch_all(i, false);
		break;
	default:
		/* memory corruption or bug, fail safely */
		rfkill_epo();
		WARN(1, "Unknown requested operation %d! "
			"rfkill Emergency Power Off activated\n",
			op);
	}
}

static void __rfkill_handle_normal_op(const enum rfkill_type type,
				      const bool complement)
{
	bool blocked;

	blocked = rfkill_get_global_sw_state(type);
	if (complement)
		blocked = !blocked;

	rfkill_switch_all(type, blocked);
}

static void rfkill_op_handler(struct work_struct *work)
{
	unsigned int i;
	bool c;

	spin_lock_irq(&rfkill_op_lock);
	do {
		if (rfkill_op_pending) {
			enum rfkill_sched_op op = rfkill_op;
			rfkill_op_pending = false;
			memset(rfkill_sw_pending, 0,
				sizeof(rfkill_sw_pending));
			spin_unlock_irq(&rfkill_op_lock);

			__rfkill_handle_global_op(op);

			spin_lock_irq(&rfkill_op_lock);

			/*
			 * handle global ops first -- during unlocked period
			 * we might have gotten a new global op.
			 */
			if (rfkill_op_pending)
				continue;
		}

		if (rfkill_is_epo_lock_active())
			continue;

		for (i = 0; i < NUM_RFKILL_TYPES; i++) {
			if (__test_and_clear_bit(i, rfkill_sw_pending)) {
				c = __test_and_clear_bit(i, rfkill_sw_state);
				spin_unlock_irq(&rfkill_op_lock);

				__rfkill_handle_normal_op(i, c);

				spin_lock_irq(&rfkill_op_lock);
			}
		}
	} while (rfkill_op_pending);
	spin_unlock_irq(&rfkill_op_lock);
}

static DECLARE_DELAYED_WORK(rfkill_op_work, rfkill_op_handler);
static unsigned long rfkill_last_scheduled;

static unsigned long rfkill_ratelimit(const unsigned long last)
{
	const unsigned long delay = msecs_to_jiffies(RFKILL_OPS_DELAY);
	return time_after(jiffies, last + delay) ? 0 : delay;
}

static void rfkill_schedule_ratelimited(void)
{
	if (delayed_work_pending(&rfkill_op_work))
		return;
	schedule_delayed_work(&rfkill_op_work,
			      rfkill_ratelimit(rfkill_last_scheduled));
	rfkill_last_scheduled = jiffies;
}

static void rfkill_schedule_global_op(enum rfkill_sched_op op)
{
	unsigned long flags;

	spin_lock_irqsave(&rfkill_op_lock, flags);
	rfkill_op = op;
	rfkill_op_pending = true;
	if (op == RFKILL_GLOBAL_OP_EPO && !rfkill_is_epo_lock_active()) {
		/* bypass the limiter for EPO */
		mod_delayed_work(system_wq, &rfkill_op_work, 0);
		rfkill_last_scheduled = jiffies;
	} else
		rfkill_schedule_ratelimited();
	spin_unlock_irqrestore(&rfkill_op_lock, flags);
}

static void rfkill_schedule_toggle(enum rfkill_type type)
{
	unsigned long flags;

	if (rfkill_is_epo_lock_active())
		return;

	spin_lock_irqsave(&rfkill_op_lock, flags);
	if (!rfkill_op_pending) {
		__set_bit(type, rfkill_sw_pending);
		__change_bit(type, rfkill_sw_state);
		rfkill_schedule_ratelimited();
	}
	spin_unlock_irqrestore(&rfkill_op_lock, flags);
}

static void rfkill_schedule_evsw_rfkillall(int state)
{
	if (state)
		rfkill_schedule_global_op(rfkill_master_switch_op);
	else
		rfkill_schedule_global_op(RFKILL_GLOBAL_OP_EPO);
}

static void rfkill_event(struct input_handle *handle, unsigned int type,
			unsigned int code, int data)
{
	if (type == EV_KEY && data == 1) {
		switch (code) {
		case KEY_WLAN:
			rfkill_schedule_toggle(RFKILL_TYPE_WLAN);
			break;
		case KEY_BLUETOOTH:
			rfkill_schedule_toggle(RFKILL_TYPE_BLUETOOTH);
			break;
		case KEY_UWB:
			rfkill_schedule_toggle(RFKILL_TYPE_UWB);
			break;
		case KEY_WIMAX:
			rfkill_schedule_toggle(RFKILL_TYPE_WIMAX);
			break;
		case KEY_RFKILL:
			rfkill_schedule_toggle(RFKILL_TYPE_ALL);
			break;
		}
	} else if (type == EV_SW && code == SW_RFKILL_ALL)
		rfkill_schedule_evsw_rfkillall(data);
}

static int rfkill_connect(struct input_handler *handler, struct input_dev *dev,
			  const struct input_device_id *id)
{
	struct input_handle *handle;
	int error;

	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
	if (!handle)
		return -ENOMEM;

	handle->dev = dev;
	handle->handler = handler;
	handle->name = "rfkill";

	/* causes rfkill_start() to be called */
	error = input_register_handle(handle);
	if (error)
		goto err_free_handle;

	error = input_open_device(handle);
	if (error)
		goto err_unregister_handle;

	return 0;

 err_unregister_handle:
	input_unregister_handle(handle);
 err_free_handle:
	kfree(handle);
	return error;
}

static void rfkill_start(struct input_handle *handle)
{
	/*
	 * Take event_lock to guard against configuration changes, we
	 * should be able to deal with concurrency with rfkill_event()
	 * just fine (which event_lock will also avoid).
	 */
	spin_lock_irq(&handle->dev->event_lock);

	if (test_bit(EV_SW, handle->dev->evbit) &&
	    test_bit(SW_RFKILL_ALL, handle->dev->swbit))
		rfkill_schedule_evsw_rfkillall(test_bit(SW_RFKILL_ALL,
							handle->dev->sw));

	spin_unlock_irq(&handle->dev->event_lock);
}

static void rfkill_disconnect(struct input_handle *handle)
{
	input_close_device(handle);
	input_unregister_handle(handle);
	kfree(handle);
}

static const struct input_device_id rfkill_ids[] = {
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
		.evbit = { BIT_MASK(EV_KEY) },
		.keybit = { [BIT_WORD(KEY_WLAN)] = BIT_MASK(KEY_WLAN) },
	},
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
		.evbit = { BIT_MASK(EV_KEY) },
		.keybit = { [BIT_WORD(KEY_BLUETOOTH)] = BIT_MASK(KEY_BLUETOOTH) },
	},
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
		.evbit = { BIT_MASK(EV_KEY) },
		.keybit = { [BIT_WORD(KEY_UWB)] = BIT_MASK(KEY_UWB) },
	},
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
		.evbit = { BIT_MASK(EV_KEY) },
		.keybit = { [BIT_WORD(KEY_WIMAX)] = BIT_MASK(KEY_WIMAX) },
	},
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
		.evbit = { BIT_MASK(EV_KEY) },
		.keybit = { [BIT_WORD(KEY_RFKILL)] = BIT_MASK(KEY_RFKILL) },
	},
	{
		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_SWBIT,
		.evbit = { BIT(EV_SW) },
		.swbit = { [BIT_WORD(SW_RFKILL_ALL)] = BIT_MASK(SW_RFKILL_ALL) },
	},
	{ }
};

static struct input_handler rfkill_handler = {
	.name =	"rfkill",
	.event = rfkill_event,
	.connect = rfkill_connect,
	.start = rfkill_start,
	.disconnect = rfkill_disconnect,
	.id_table = rfkill_ids,
};

int __init rfkill_handler_init(void)
{
	switch (rfkill_master_switch_mode) {
	case RFKILL_INPUT_MASTER_UNBLOCKALL:
		rfkill_master_switch_op = RFKILL_GLOBAL_OP_UNBLOCK;
		break;
	case RFKILL_INPUT_MASTER_RESTORE:
		rfkill_master_switch_op = RFKILL_GLOBAL_OP_RESTORE;
		break;
	case RFKILL_INPUT_MASTER_UNLOCK:
		rfkill_master_switch_op = RFKILL_GLOBAL_OP_UNLOCK;
		break;
	default:
		return -EINVAL;
	}

	spin_lock_init(&rfkill_op_lock);

	/* Avoid delay at first schedule */
	rfkill_last_scheduled =
			jiffies - msecs_to_jiffies(RFKILL_OPS_DELAY) - 1;
	return input_register_handler(&rfkill_handler);
}

void __exit rfkill_handler_exit(void)
{
	input_unregister_handler(&rfkill_handler);
	cancel_delayed_work_sync(&rfkill_op_work);
}
Commit	Line	Data
19d337df JB	1	/*
	2	* Input layer to RF Kill interface connector
	3	*
	4	* Copyright (c) 2007 Dmitry Torokhov
	5	* Copyright 2009 Johannes Berg <[email protected]>
	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>
d9b93842	18	#include <linux/moduleparam.h>
19d337df JB	19	#include <linux/workqueue.h>
	20	#include <linux/init.h>
	21	#include <linux/rfkill.h>
	22	#include <linux/sched.h>
	23
	24	#include "rfkill.h"
	25
	26	enum rfkill_input_master_mode {
	27	RFKILL_INPUT_MASTER_UNLOCK = 0,
	28	RFKILL_INPUT_MASTER_RESTORE = 1,
	29	RFKILL_INPUT_MASTER_UNBLOCKALL = 2,
	30	NUM_RFKILL_INPUT_MASTER_MODES
	31	};
	32
	33	/* Delay (in ms) between consecutive switch ops */
	34	#define RFKILL_OPS_DELAY 200
	35
	36	static enum rfkill_input_master_mode rfkill_master_switch_mode =
	37	RFKILL_INPUT_MASTER_UNBLOCKALL;
	38	module_param_named(master_switch_mode, rfkill_master_switch_mode, uint, 0);
	39	MODULE_PARM_DESC(master_switch_mode,
	40	"SW_RFKILL_ALL ON should: 0=do nothing (only unlock); 1=restore; 2=unblock all");
	41
	42	static spinlock_t rfkill_op_lock;
	43	static bool rfkill_op_pending;
	44	static unsigned long rfkill_sw_pending[BITS_TO_LONGS(NUM_RFKILL_TYPES)];
	45	static unsigned long rfkill_sw_state[BITS_TO_LONGS(NUM_RFKILL_TYPES)];
	46
	47	enum rfkill_sched_op {
	48	RFKILL_GLOBAL_OP_EPO = 0,
	49	RFKILL_GLOBAL_OP_RESTORE,
	50	RFKILL_GLOBAL_OP_UNLOCK,
	51	RFKILL_GLOBAL_OP_UNBLOCK,
	52	};
	53
	54	static enum rfkill_sched_op rfkill_master_switch_op;
	55	static enum rfkill_sched_op rfkill_op;
	56
	57	static void __rfkill_handle_global_op(enum rfkill_sched_op op)
	58	{
	59	unsigned int i;
	60
	61	switch (op) {
	62	case RFKILL_GLOBAL_OP_EPO:
	63	rfkill_epo();
	64	break;
	65	case RFKILL_GLOBAL_OP_RESTORE:
	66	rfkill_restore_states();
	67	break;
	68	case RFKILL_GLOBAL_OP_UNLOCK:
	69	rfkill_remove_epo_lock();
	70	break;
	71	case RFKILL_GLOBAL_OP_UNBLOCK:
	72	rfkill_remove_epo_lock();
	73	for (i = 0; i < NUM_RFKILL_TYPES; i++)
	74	rfkill_switch_all(i, false);
	75	break;
	76	default:
	77	/* memory corruption or bug, fail safely */
	78	rfkill_epo();
	79	WARN(1, "Unknown requested operation %d! "
	80	"rfkill Emergency Power Off activated\n",
	81	op);
	82	}
83	}
84
85	static void __rfkill_handle_normal_op(const enum rfkill_type type,
86	const bool complement)
87	{
88	bool blocked;
89
90	blocked = rfkill_get_global_sw_state(type);
91	if (complement)
92	blocked = !blocked;
93
94	rfkill_switch_all(type, blocked);
95	}
96
97	static void rfkill_op_handler(struct work_struct *work)
98	{
99	unsigned int i;
100	bool c;
101
102	spin_lock_irq(&rfkill_op_lock);
103	do {
104	if (rfkill_op_pending) {
105	enum rfkill_sched_op op = rfkill_op;
106	rfkill_op_pending = false;
107	memset(rfkill_sw_pending, 0,
108	sizeof(rfkill_sw_pending));
109	spin_unlock_irq(&rfkill_op_lock);
110
111	__rfkill_handle_global_op(op);
112
113	spin_lock_irq(&rfkill_op_lock);
114
115	/*
116	* handle global ops first -- during unlocked period
117	* we might have gotten a new global op.
118	*/
119	if (rfkill_op_pending)
120	continue;
121	}
122
123	if (rfkill_is_epo_lock_active())
124	continue;
125
126	for (i = 0; i < NUM_RFKILL_TYPES; i++) {
127	if (__test_and_clear_bit(i, rfkill_sw_pending)) {
128	c = __test_and_clear_bit(i, rfkill_sw_state);
129	spin_unlock_irq(&rfkill_op_lock);
130
131	__rfkill_handle_normal_op(i, c);
132
133	spin_lock_irq(&rfkill_op_lock);
134	}
135	}
136	} while (rfkill_op_pending);
137	spin_unlock_irq(&rfkill_op_lock);
138	}
139
140	static DECLARE_DELAYED_WORK(rfkill_op_work, rfkill_op_handler);
141	static unsigned long rfkill_last_scheduled;
142
143	static unsigned long rfkill_ratelimit(const unsigned long last)
144	{
145	const unsigned long delay = msecs_to_jiffies(RFKILL_OPS_DELAY);
a02cec21	146	return time_after(jiffies, last + delay) ? 0 : delay;
19d337df JB	147	}
	148
	149	static void rfkill_schedule_ratelimited(void)
	150	{
	151	if (delayed_work_pending(&rfkill_op_work))
	152	return;
	153	schedule_delayed_work(&rfkill_op_work,
	154	rfkill_ratelimit(rfkill_last_scheduled));
	155	rfkill_last_scheduled = jiffies;
	156	}
	157
	158	static void rfkill_schedule_global_op(enum rfkill_sched_op op)
	159	{
	160	unsigned long flags;
	161
	162	spin_lock_irqsave(&rfkill_op_lock, flags);
	163	rfkill_op = op;
	164	rfkill_op_pending = true;
	165	if (op == RFKILL_GLOBAL_OP_EPO && !rfkill_is_epo_lock_active()) {
	166	/* bypass the limiter for EPO */
41f63c53	167	mod_delayed_work(system_wq, &rfkill_op_work, 0);
19d337df JB	168	rfkill_last_scheduled = jiffies;
	169	} else
	170	rfkill_schedule_ratelimited();
	171	spin_unlock_irqrestore(&rfkill_op_lock, flags);
	172	}
	173
	174	static 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
	190	static 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
	198	static 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;
3082a2b7 MG	215	case KEY_RFKILL:
	216	rfkill_schedule_toggle(RFKILL_TYPE_ALL);
	217	break;
19d337df JB	218	}
	219	} else if (type == EV_SW && code == SW_RFKILL_ALL)
	220	rfkill_schedule_evsw_rfkillall(data);
	221	}
	222
	223	static int rfkill_connect(struct input_handler handler, struct input_dev dev,
	224	const struct input_device_id *id)
	225	{
	226	struct input_handle *handle;
	227	int error;
	228
	229	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
	230	if (!handle)
	231	return -ENOMEM;
	232
	233	handle->dev = dev;
	234	handle->handler = handler;
	235	handle->name = "rfkill";
	236
	237	/* causes rfkill_start() to be called */
	238	error = input_register_handle(handle);
	239	if (error)
	240	goto err_free_handle;
	241
	242	error = input_open_device(handle);
	243	if (error)
	244	goto err_unregister_handle;
	245
	246	return 0;
	247
	248	err_unregister_handle:
	249	input_unregister_handle(handle);
	250	err_free_handle:
	251	kfree(handle);
	252	return error;
	253	}
	254
	255	static void rfkill_start(struct input_handle *handle)
	256	{
	257	/*
	258	* Take event_lock to guard against configuration changes, we
	259	* should be able to deal with concurrency with rfkill_event()
	260	* just fine (which event_lock will also avoid).
	261	*/
	262	spin_lock_irq(&handle->dev->event_lock);
	263
	264	if (test_bit(EV_SW, handle->dev->evbit) &&
	265	test_bit(SW_RFKILL_ALL, handle->dev->swbit))
	266	rfkill_schedule_evsw_rfkillall(test_bit(SW_RFKILL_ALL,
	267	handle->dev->sw));
	268
	269	spin_unlock_irq(&handle->dev->event_lock);
	270	}
	271
	272	static void rfkill_disconnect(struct input_handle *handle)
	273	{
	274	input_close_device(handle);
	275	input_unregister_handle(handle);
	276	kfree(handle);
	277	}
	278
	279	static const struct input_device_id rfkill_ids[] = {
	280	{
	281	.flags = INPUT_DEVICE_ID_MATCH_EVBIT \| INPUT_DEVICE_ID_MATCH_KEYBIT,
282	.evbit = { BIT_MASK(EV_KEY) },
283	.keybit = { [BIT_WORD(KEY_WLAN)] = BIT_MASK(KEY_WLAN) },
284	},
285	{
286	.flags = INPUT_DEVICE_ID_MATCH_EVBIT \| INPUT_DEVICE_ID_MATCH_KEYBIT,
287	.evbit = { BIT_MASK(EV_KEY) },
288	.keybit = { [BIT_WORD(KEY_BLUETOOTH)] = BIT_MASK(KEY_BLUETOOTH) },
289	},
290	{
291	.flags = INPUT_DEVICE_ID_MATCH_EVBIT \| INPUT_DEVICE_ID_MATCH_KEYBIT,
292	.evbit = { BIT_MASK(EV_KEY) },
293	.keybit = { [BIT_WORD(KEY_UWB)] = BIT_MASK(KEY_UWB) },
294	},
295	{
296	.flags = INPUT_DEVICE_ID_MATCH_EVBIT \| INPUT_DEVICE_ID_MATCH_KEYBIT,
297	.evbit = { BIT_MASK(EV_KEY) },
298	.keybit = { [BIT_WORD(KEY_WIMAX)] = BIT_MASK(KEY_WIMAX) },
299	},
3082a2b7 MG	300	{
	301	.flags = INPUT_DEVICE_ID_MATCH_EVBIT \| INPUT_DEVICE_ID_MATCH_KEYBIT,
	302	.evbit = { BIT_MASK(EV_KEY) },
	303	.keybit = { [BIT_WORD(KEY_RFKILL)] = BIT_MASK(KEY_RFKILL) },
	304	},
19d337df JB	305	{
	306	.flags = INPUT_DEVICE_ID_MATCH_EVBIT \| INPUT_DEVICE_ID_MATCH_SWBIT,
	307	.evbit = { BIT(EV_SW) },
	308	.swbit = { [BIT_WORD(SW_RFKILL_ALL)] = BIT_MASK(SW_RFKILL_ALL) },
	309	},
	310	{ }
	311	};
	312
	313	static struct input_handler rfkill_handler = {
	314	.name = "rfkill",
	315	.event = rfkill_event,
	316	.connect = rfkill_connect,
	317	.start = rfkill_start,
	318	.disconnect = rfkill_disconnect,
	319	.id_table = rfkill_ids,
	320	};
	321
	322	int __init rfkill_handler_init(void)
	323	{
	324	switch (rfkill_master_switch_mode) {
	325	case RFKILL_INPUT_MASTER_UNBLOCKALL:
	326	rfkill_master_switch_op = RFKILL_GLOBAL_OP_UNBLOCK;
	327	break;
	328	case RFKILL_INPUT_MASTER_RESTORE:
	329	rfkill_master_switch_op = RFKILL_GLOBAL_OP_RESTORE;
	330	break;
	331	case RFKILL_INPUT_MASTER_UNLOCK:
	332	rfkill_master_switch_op = RFKILL_GLOBAL_OP_UNLOCK;
	333	break;
	334	default:
	335	return -EINVAL;
	336	}
	337
	338	spin_lock_init(&rfkill_op_lock);
	339
	340	/* Avoid delay at first schedule */
	341	rfkill_last_scheduled =
	342	jiffies - msecs_to_jiffies(RFKILL_OPS_DELAY) - 1;
	343	return input_register_handler(&rfkill_handler);
	344	}
	345
	346	void __exit rfkill_handler_exit(void)
	347	{
	348	input_unregister_handler(&rfkill_handler);
	349	cancel_delayed_work_sync(&rfkill_op_work);
	350	}