[deliverable/linux.git] / drivers / media / IR / ir-raw-event.c

/* ir-raw-event.c - handle IR Pulse/Space event
 *
 * Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 */

#include <linux/kthread.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/freezer.h>
#include "ir-core-priv.h"

/* Define the max number of pulse/space transitions to buffer */
#define MAX_IR_EVENT_SIZE      512

/* Used to keep track of IR raw clients, protected by ir_raw_handler_lock */
static LIST_HEAD(ir_raw_client_list);

/* Used to handle IR raw handler extensions */
static DEFINE_MUTEX(ir_raw_handler_lock);
static LIST_HEAD(ir_raw_handler_list);
static u64 available_protocols;

#ifdef MODULE
/* Used to load the decoders */
static struct work_struct wq_load;
#endif

static int ir_raw_event_thread(void *data)
{
	struct ir_raw_event ev;
	struct ir_raw_handler *handler;
	struct ir_raw_event_ctrl *raw = (struct ir_raw_event_ctrl *)data;
	int retval;

	while (!kthread_should_stop()) {

		spin_lock_irq(&raw->lock);
		retval = kfifo_out(&raw->kfifo, &ev, sizeof(ev));

		if (!retval) {
			set_current_state(TASK_INTERRUPTIBLE);

			if (kthread_should_stop())
				set_current_state(TASK_RUNNING);

			spin_unlock_irq(&raw->lock);
			schedule();
			continue;
		}

		spin_unlock_irq(&raw->lock);


		BUG_ON(retval != sizeof(ev));

		mutex_lock(&ir_raw_handler_lock);
		list_for_each_entry(handler, &ir_raw_handler_list, list)
			handler->decode(raw->input_dev, ev);
		raw->prev_ev = ev;
		mutex_unlock(&ir_raw_handler_lock);
	}

	return 0;
}

/**
 * ir_raw_event_store() - pass a pulse/space duration to the raw ir decoders
 * @input_dev:	the struct input_dev device descriptor
 * @ev:		the struct ir_raw_event descriptor of the pulse/space
 *
 * This routine (which may be called from an interrupt context) stores a
 * pulse/space duration for the raw ir decoding state machines. Pulses are
 * signalled as positive values and spaces as negative values. A zero value
 * will reset the decoding state machines.
 */
int ir_raw_event_store(struct input_dev *input_dev, struct ir_raw_event *ev)
{
	struct ir_input_dev *ir = input_get_drvdata(input_dev);

	if (!ir->raw)
		return -EINVAL;

	IR_dprintk(2, "sample: (%05dus %s)\n",
		TO_US(ev->duration), TO_STR(ev->pulse));

	if (kfifo_in(&ir->raw->kfifo, ev, sizeof(*ev)) != sizeof(*ev))
		return -ENOMEM;

	return 0;
}
EXPORT_SYMBOL_GPL(ir_raw_event_store);

/**
 * ir_raw_event_store_edge() - notify raw ir decoders of the start of a pulse/space
 * @input_dev:	the struct input_dev device descriptor
 * @type:	the type of the event that has occurred
 *
 * This routine (which may be called from an interrupt context) is used to
 * store the beginning of an ir pulse or space (or the start/end of ir
 * reception) for the raw ir decoding state machines. This is used by
 * hardware which does not provide durations directly but only interrupts
 * (or similar events) on state change.
 */
int ir_raw_event_store_edge(struct input_dev *input_dev, enum raw_event_type type)
{
	struct ir_input_dev	*ir = input_get_drvdata(input_dev);
	ktime_t			now;
	s64			delta; /* ns */
	struct ir_raw_event	ev;
	int			rc = 0;

	if (!ir->raw)
		return -EINVAL;

	now = ktime_get();
	delta = ktime_to_ns(ktime_sub(now, ir->raw->last_event));

	/* Check for a long duration since last event or if we're
	 * being called for the first time, note that delta can't
	 * possibly be negative.
	 */
	ev.duration = 0;
	if (delta > IR_MAX_DURATION || !ir->raw->last_type)
		type |= IR_START_EVENT;
	else
		ev.duration = delta;

	if (type & IR_START_EVENT)
		ir_raw_event_reset(input_dev);
	else if (ir->raw->last_type & IR_SPACE) {
		ev.pulse = false;
		rc = ir_raw_event_store(input_dev, &ev);
	} else if (ir->raw->last_type & IR_PULSE) {
		ev.pulse = true;
		rc = ir_raw_event_store(input_dev, &ev);
	} else
		return 0;

	ir->raw->last_event = now;
	ir->raw->last_type = type;
	return rc;
}
EXPORT_SYMBOL_GPL(ir_raw_event_store_edge);

/**
 * ir_raw_event_store_with_filter() - pass next pulse/space to decoders with some processing
 * @input_dev:	the struct input_dev device descriptor
 * @type:	the type of the event that has occurred
 *
 * This routine (which may be called from an interrupt context) works
 * in similiar manner to ir_raw_event_store_edge.
 * This routine is intended for devices with limited internal buffer
 * It automerges samples of same type, and handles timeouts
 */
int ir_raw_event_store_with_filter(struct input_dev *input_dev,
						struct ir_raw_event *ev)
{
	struct ir_input_dev *ir = input_get_drvdata(input_dev);
	struct ir_raw_event_ctrl *raw = ir->raw;

	if (!raw || !ir->props)
		return -EINVAL;

	/* Ignore spaces in idle mode */
	if (ir->idle && !ev->pulse)
		return 0;
	else if (ir->idle)
		ir_raw_event_set_idle(input_dev, false);

	if (!raw->this_ev.duration) {
		raw->this_ev = *ev;
	} else if (ev->pulse == raw->this_ev.pulse) {
		raw->this_ev.duration += ev->duration;
	} else {
		ir_raw_event_store(input_dev, &raw->this_ev);
		raw->this_ev = *ev;
	}

	/* Enter idle mode if nessesary */
	if (!ev->pulse && ir->props->timeout &&
		raw->this_ev.duration >= ir->props->timeout) {
		ir_raw_event_set_idle(input_dev, true);
	}
	return 0;
}
EXPORT_SYMBOL_GPL(ir_raw_event_store_with_filter);

/**
 * ir_raw_event_set_idle() - hint the ir core if device is receiving
 * IR data or not
 * @input_dev: the struct input_dev device descriptor
 * @idle: the hint value
 */
void ir_raw_event_set_idle(struct input_dev *input_dev, bool idle)
{
	struct ir_input_dev *ir = input_get_drvdata(input_dev);
	struct ir_raw_event_ctrl *raw = ir->raw;

	if (!ir->props || !ir->raw)
		return;

	IR_dprintk(2, "%s idle mode\n", idle ? "enter" : "leave");

	if (idle) {
		raw->this_ev.timeout = true;
		ir_raw_event_store(input_dev, &raw->this_ev);
		init_ir_raw_event(&raw->this_ev);
	}

	if (ir->props->s_idle)
		ir->props->s_idle(ir->props->priv, idle);
	ir->idle = idle;
}
EXPORT_SYMBOL_GPL(ir_raw_event_set_idle);

/**
 * ir_raw_event_handle() - schedules the decoding of stored ir data
 * @input_dev:	the struct input_dev device descriptor
 *
 * This routine will signal the workqueue to start decoding stored ir data.
 */
void ir_raw_event_handle(struct input_dev *input_dev)
{
	struct ir_input_dev *ir = input_get_drvdata(input_dev);
	unsigned long flags;

	if (!ir->raw)
		return;

	spin_lock_irqsave(&ir->raw->lock, flags);
	wake_up_process(ir->raw->thread);
	spin_unlock_irqrestore(&ir->raw->lock, flags);
}
EXPORT_SYMBOL_GPL(ir_raw_event_handle);

/* used internally by the sysfs interface */
u64
ir_raw_get_allowed_protocols()
{
	u64 protocols;
	mutex_lock(&ir_raw_handler_lock);
	protocols = available_protocols;
	mutex_unlock(&ir_raw_handler_lock);
	return protocols;
}

/*
 * Used to (un)register raw event clients
 */
int ir_raw_event_register(struct input_dev *input_dev)
{
	struct ir_input_dev *ir = input_get_drvdata(input_dev);
	int rc;
	struct ir_raw_handler *handler;

	ir->raw = kzalloc(sizeof(*ir->raw), GFP_KERNEL);
	if (!ir->raw)
		return -ENOMEM;

	ir->raw->input_dev = input_dev;

	ir->raw->enabled_protocols = ~0;
	rc = kfifo_alloc(&ir->raw->kfifo, sizeof(s64) * MAX_IR_EVENT_SIZE,
			 GFP_KERNEL);
	if (rc < 0) {
		kfree(ir->raw);
		ir->raw = NULL;
		return rc;
	}

	spin_lock_init(&ir->raw->lock);
	ir->raw->thread = kthread_run(ir_raw_event_thread, ir->raw,
			"rc%u",  (unsigned int)ir->devno);

	if (IS_ERR(ir->raw->thread)) {
		int ret = PTR_ERR(ir->raw->thread);

		kfree(ir->raw);
		ir->raw = NULL;
		return ret;
	}

	mutex_lock(&ir_raw_handler_lock);
	list_add_tail(&ir->raw->list, &ir_raw_client_list);
	list_for_each_entry(handler, &ir_raw_handler_list, list)
		if (handler->raw_register)
			handler->raw_register(ir->raw->input_dev);
	mutex_unlock(&ir_raw_handler_lock);

	return 0;
}

void ir_raw_event_unregister(struct input_dev *input_dev)
{
	struct ir_input_dev *ir = input_get_drvdata(input_dev);
	struct ir_raw_handler *handler;

	if (!ir->raw)
		return;

	kthread_stop(ir->raw->thread);

	mutex_lock(&ir_raw_handler_lock);
	list_del(&ir->raw->list);
	list_for_each_entry(handler, &ir_raw_handler_list, list)
		if (handler->raw_unregister)
			handler->raw_unregister(ir->raw->input_dev);
	mutex_unlock(&ir_raw_handler_lock);

	kfifo_free(&ir->raw->kfifo);
	kfree(ir->raw);
	ir->raw = NULL;
}

/*
 * Extension interface - used to register the IR decoders
 */

int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler)
{
	struct ir_raw_event_ctrl *raw;

	mutex_lock(&ir_raw_handler_lock);
	list_add_tail(&ir_raw_handler->list, &ir_raw_handler_list);
	if (ir_raw_handler->raw_register)
		list_for_each_entry(raw, &ir_raw_client_list, list)
			ir_raw_handler->raw_register(raw->input_dev);
	available_protocols |= ir_raw_handler->protocols;
	mutex_unlock(&ir_raw_handler_lock);

	return 0;
}
EXPORT_SYMBOL(ir_raw_handler_register);

void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler)
{
	struct ir_raw_event_ctrl *raw;

	mutex_lock(&ir_raw_handler_lock);
	list_del(&ir_raw_handler->list);
	if (ir_raw_handler->raw_unregister)
		list_for_each_entry(raw, &ir_raw_client_list, list)
			ir_raw_handler->raw_unregister(raw->input_dev);
	available_protocols &= ~ir_raw_handler->protocols;
	mutex_unlock(&ir_raw_handler_lock);
}
EXPORT_SYMBOL(ir_raw_handler_unregister);

#ifdef MODULE
static void init_decoders(struct work_struct *work)
{
	/* Load the decoder modules */

	load_nec_decode();
	load_rc5_decode();
	load_rc6_decode();
	load_jvc_decode();
	load_sony_decode();
	load_lirc_codec();

	/* If needed, we may later add some init code. In this case,
	   it is needed to change the CONFIG_MODULE test at ir-core.h
	 */
}
#endif

void ir_raw_init(void)
{
#ifdef MODULE
	INIT_WORK(&wq_load, init_decoders);
	schedule_work(&wq_load);
#endif
}
Commit	Line	Data
a3572c34 MCC	1	/* ir-raw-event.c - handle IR Pulse/Space event
	2	*
	3	* Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
	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 version 2 of the License.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*/
	14
0d2cb1de	15	#include <linux/kthread.h>
45a568fa	16	#include <linux/mutex.h>
724e2495	17	#include <linux/sched.h>
0d2cb1de	18	#include <linux/freezer.h>
3f113e36	19	#include "ir-core-priv.h"
a3572c34	20
724e2495 DH	21	/* Define the max number of pulse/space transitions to buffer */
724e2495 DH	22	#define MAX_IR_EVENT_SIZE 512
a3572c34	23
c216369e DH	24	/* Used to keep track of IR raw clients, protected by ir_raw_handler_lock */
	25	static LIST_HEAD(ir_raw_client_list);
	26
995187be	27	/* Used to handle IR raw handler extensions */
45a568fa	28	static DEFINE_MUTEX(ir_raw_handler_lock);
667c9ebe DH	29	static LIST_HEAD(ir_raw_handler_list);
667c9ebe DH	30	static u64 available_protocols;
93c312ff	31
5fa2989f	32	#ifdef MODULE
995187be MCC	33	/* Used to load the decoders */
995187be MCC	34	static struct work_struct wq_load;
5fa2989f	35	#endif
995187be	36
0d2cb1de	37	static int ir_raw_event_thread(void *data)
724e2495	38	{
e40b1127	39	struct ir_raw_event ev;
c216369e	40	struct ir_raw_handler *handler;
0d2cb1de	41	struct ir_raw_event_ctrl raw = (struct ir_raw_event_ctrl )data;
c6ef1e7f	42	int retval;
0d2cb1de ML	43
0d2cb1de ML	44	while (!kthread_should_stop()) {
724e2495	45
c6ef1e7f ML	46	spin_lock_irq(&raw->lock);
	47	retval = kfifo_out(&raw->kfifo, &ev, sizeof(ev));
	48
	49	if (!retval) {
	50	set_current_state(TASK_INTERRUPTIBLE);
0d2cb1de	51
c6ef1e7f ML	52	if (kthread_should_stop())
	53	set_current_state(TASK_RUNNING);
	54
	55	spin_unlock_irq(&raw->lock);
	56	schedule();
	57	continue;
0d2cb1de ML	58	}
0d2cb1de ML	59
c6ef1e7f	60	spin_unlock_irq(&raw->lock);
0d2cb1de	61
c6ef1e7f ML	62
	63	BUG_ON(retval != sizeof(ev));
	64
	65	mutex_lock(&ir_raw_handler_lock);
	66	list_for_each_entry(handler, &ir_raw_handler_list, list)
	67	handler->decode(raw->input_dev, ev);
	68	raw->prev_ev = ev;
	69	mutex_unlock(&ir_raw_handler_lock);
c216369e	70	}
0d2cb1de ML	71
0d2cb1de ML	72	return 0;
724e2495 DH	73	}
724e2495 DH	74
724e2495 DH	75	/**
	76	* ir_raw_event_store() - pass a pulse/space duration to the raw ir decoders
	77	* @input_dev: the struct input_dev device descriptor
e40b1127	78	* @ev: the struct ir_raw_event descriptor of the pulse/space
724e2495 DH	79	*
	80	* This routine (which may be called from an interrupt context) stores a
	81	* pulse/space duration for the raw ir decoding state machines. Pulses are
	82	* signalled as positive values and spaces as negative values. A zero value
	83	* will reset the decoding state machines.
	84	*/
e40b1127	85	int ir_raw_event_store(struct input_dev input_dev, struct ir_raw_event ev)
a3572c34	86	{
724e2495	87	struct ir_input_dev *ir = input_get_drvdata(input_dev);
a3572c34 MCC	88
	89	if (!ir->raw)
	90	return -EINVAL;
	91
74c4792c	92	IR_dprintk(2, "sample: (%05dus %s)\n",
510fcb70 ML	93	TO_US(ev->duration), TO_STR(ev->pulse));
510fcb70 ML	94
e40b1127	95	if (kfifo_in(&ir->raw->kfifo, ev, sizeof(ev)) != sizeof(ev))
724e2495	96	return -ENOMEM;
a3572c34	97
724e2495 DH	98	return 0;
	99	}
	100	EXPORT_SYMBOL_GPL(ir_raw_event_store);
a3572c34	101
724e2495 DH	102	/**
	103	* ir_raw_event_store_edge() - notify raw ir decoders of the start of a pulse/space
	104	* @input_dev: the struct input_dev device descriptor
	105	* @type: the type of the event that has occurred
	106	*
	107	* This routine (which may be called from an interrupt context) is used to
	108	* store the beginning of an ir pulse or space (or the start/end of ir
	109	* reception) for the raw ir decoding state machines. This is used by
	110	* hardware which does not provide durations directly but only interrupts
	111	* (or similar events) on state change.
	112	*/
	113	int ir_raw_event_store_edge(struct input_dev *input_dev, enum raw_event_type type)
	114	{
	115	struct ir_input_dev *ir = input_get_drvdata(input_dev);
	116	ktime_t now;
	117	s64 delta; /* ns */
e40b1127	118	struct ir_raw_event ev;
724e2495	119	int rc = 0;
a3572c34	120
724e2495 DH	121	if (!ir->raw)
724e2495 DH	122	return -EINVAL;
a3572c34	123
724e2495 DH	124	now = ktime_get();
724e2495 DH	125	delta = ktime_to_ns(ktime_sub(now, ir->raw->last_event));
a3572c34	126
724e2495 DH	127	/* Check for a long duration since last event or if we're
	128	* being called for the first time, note that delta can't
	129	* possibly be negative.
	130	*/
e40b1127 DH	131	ev.duration = 0;
e40b1127 DH	132	if (delta > IR_MAX_DURATION \|\| !ir->raw->last_type)
724e2495	133	type \|= IR_START_EVENT;
e40b1127 DH	134	else
e40b1127 DH	135	ev.duration = delta;
724e2495 DH	136
	137	if (type & IR_START_EVENT)
	138	ir_raw_event_reset(input_dev);
e40b1127 DH	139	else if (ir->raw->last_type & IR_SPACE) {
	140	ev.pulse = false;
	141	rc = ir_raw_event_store(input_dev, &ev);
	142	} else if (ir->raw->last_type & IR_PULSE) {
	143	ev.pulse = true;
	144	rc = ir_raw_event_store(input_dev, &ev);
	145	} else
724e2495	146	return 0;
a3572c34	147
724e2495 DH	148	ir->raw->last_event = now;
724e2495 DH	149	ir->raw->last_type = type;
a3572c34 MCC	150	return rc;
a3572c34 MCC	151	}
724e2495	152	EXPORT_SYMBOL_GPL(ir_raw_event_store_edge);
a3572c34	153
4a702ebf ML	154	/**
	155	* ir_raw_event_store_with_filter() - pass next pulse/space to decoders with some processing
	156	* @input_dev: the struct input_dev device descriptor
	157	* @type: the type of the event that has occurred
	158	*
	159	* This routine (which may be called from an interrupt context) works
	160	* in similiar manner to ir_raw_event_store_edge.
	161	* This routine is intended for devices with limited internal buffer
	162	* It automerges samples of same type, and handles timeouts
	163	*/
	164	int ir_raw_event_store_with_filter(struct input_dev *input_dev,
	165	struct ir_raw_event *ev)
	166	{
	167	struct ir_input_dev *ir = input_get_drvdata(input_dev);
	168	struct ir_raw_event_ctrl *raw = ir->raw;
	169
	170	if (!raw \|\| !ir->props)
	171	return -EINVAL;
	172
	173	/* Ignore spaces in idle mode */
	174	if (ir->idle && !ev->pulse)
	175	return 0;
	176	else if (ir->idle)
4651918a	177	ir_raw_event_set_idle(input_dev, false);
4a702ebf ML	178
	179	if (!raw->this_ev.duration) {
	180	raw->this_ev = *ev;
	181	} else if (ev->pulse == raw->this_ev.pulse) {
	182	raw->this_ev.duration += ev->duration;
	183	} else {
	184	ir_raw_event_store(input_dev, &raw->this_ev);
	185	raw->this_ev = *ev;
	186	}
	187
	188	/* Enter idle mode if nessesary */
	189	if (!ev->pulse && ir->props->timeout &&
4651918a ML	190	raw->this_ev.duration >= ir->props->timeout) {
	191	ir_raw_event_set_idle(input_dev, true);
	192	}
4a702ebf ML	193	return 0;
	194	}
	195	EXPORT_SYMBOL_GPL(ir_raw_event_store_with_filter);
	196
4651918a ML	197	/**
	198	* ir_raw_event_set_idle() - hint the ir core if device is receiving
	199	* IR data or not
	200	* @input_dev: the struct input_dev device descriptor
	201	* @idle: the hint value
	202	*/
	203	void ir_raw_event_set_idle(struct input_dev *input_dev, bool idle)
4a702ebf ML	204	{
	205	struct ir_input_dev *ir = input_get_drvdata(input_dev);
	206	struct ir_raw_event_ctrl *raw = ir->raw;
4a702ebf	207
4651918a	208	if (!ir->props \|\| !ir->raw)
4a702ebf ML	209	return;
4a702ebf ML	210
4651918a	211	IR_dprintk(2, "%s idle mode\n", idle ? "enter" : "leave");
4a702ebf ML	212
4a702ebf ML	213	if (idle) {
4651918a	214	raw->this_ev.timeout = true;
4a702ebf	215	ir_raw_event_store(input_dev, &raw->this_ev);
4651918a	216	init_ir_raw_event(&raw->this_ev);
4a702ebf	217	}
4651918a	218
4a702ebf ML	219	if (ir->props->s_idle)
	220	ir->props->s_idle(ir->props->priv, idle);
	221	ir->idle = idle;
	222	}
	223	EXPORT_SYMBOL_GPL(ir_raw_event_set_idle);
	224
724e2495 DH	225	/**
	226	* ir_raw_event_handle() - schedules the decoding of stored ir data
	227	* @input_dev: the struct input_dev device descriptor
	228	*
	229	* This routine will signal the workqueue to start decoding stored ir data.
	230	*/
	231	void ir_raw_event_handle(struct input_dev *input_dev)
a3572c34	232	{
724e2495	233	struct ir_input_dev *ir = input_get_drvdata(input_dev);
c6ef1e7f	234	unsigned long flags;
a3572c34	235
724e2495 DH	236	if (!ir->raw)
724e2495 DH	237	return;
a3572c34	238
c6ef1e7f	239	spin_lock_irqsave(&ir->raw->lock, flags);
0d2cb1de	240	wake_up_process(ir->raw->thread);
c6ef1e7f	241	spin_unlock_irqrestore(&ir->raw->lock, flags);
a3572c34 MCC	242	}
a3572c34 MCC	243	EXPORT_SYMBOL_GPL(ir_raw_event_handle);
995187be	244
667c9ebe DH	245	/* used internally by the sysfs interface */
	246	u64
	247	ir_raw_get_allowed_protocols()
	248	{
	249	u64 protocols;
45a568fa	250	mutex_lock(&ir_raw_handler_lock);
667c9ebe	251	protocols = available_protocols;
45a568fa	252	mutex_unlock(&ir_raw_handler_lock);
667c9ebe DH	253	return protocols;
	254	}
	255
	256	/*
	257	* Used to (un)register raw event clients
	258	*/
	259	int ir_raw_event_register(struct input_dev *input_dev)
	260	{
	261	struct ir_input_dev *ir = input_get_drvdata(input_dev);
	262	int rc;
c216369e	263	struct ir_raw_handler *handler;
667c9ebe DH	264
	265	ir->raw = kzalloc(sizeof(*ir->raw), GFP_KERNEL);
	266	if (!ir->raw)
	267	return -ENOMEM;
	268
	269	ir->raw->input_dev = input_dev;
0d2cb1de	270
667c9ebe DH	271	ir->raw->enabled_protocols = ~0;
	272	rc = kfifo_alloc(&ir->raw->kfifo, sizeof(s64) * MAX_IR_EVENT_SIZE,
	273	GFP_KERNEL);
	274	if (rc < 0) {
	275	kfree(ir->raw);
	276	ir->raw = NULL;
	277	return rc;
	278	}
	279
c6ef1e7f	280	spin_lock_init(&ir->raw->lock);
0d2cb1de ML	281	ir->raw->thread = kthread_run(ir_raw_event_thread, ir->raw,
	282	"rc%u", (unsigned int)ir->devno);
	283
	284	if (IS_ERR(ir->raw->thread)) {
028816bc DC	285	int ret = PTR_ERR(ir->raw->thread);
028816bc DC	286
0d2cb1de ML	287	kfree(ir->raw);
0d2cb1de ML	288	ir->raw = NULL;
028816bc	289	return ret;
0d2cb1de ML	290	}
0d2cb1de ML	291
45a568fa	292	mutex_lock(&ir_raw_handler_lock);
c216369e DH	293	list_add_tail(&ir->raw->list, &ir_raw_client_list);
	294	list_for_each_entry(handler, &ir_raw_handler_list, list)
	295	if (handler->raw_register)
	296	handler->raw_register(ir->raw->input_dev);
45a568fa	297	mutex_unlock(&ir_raw_handler_lock);
667c9ebe	298
c216369e	299	return 0;
667c9ebe DH	300	}
	301
	302	void ir_raw_event_unregister(struct input_dev *input_dev)
	303	{
	304	struct ir_input_dev *ir = input_get_drvdata(input_dev);
c216369e	305	struct ir_raw_handler *handler;
667c9ebe DH	306
	307	if (!ir->raw)
	308	return;
	309
0d2cb1de	310	kthread_stop(ir->raw->thread);
c216369e	311
45a568fa	312	mutex_lock(&ir_raw_handler_lock);
c216369e DH	313	list_del(&ir->raw->list);
	314	list_for_each_entry(handler, &ir_raw_handler_list, list)
	315	if (handler->raw_unregister)
	316	handler->raw_unregister(ir->raw->input_dev);
45a568fa	317	mutex_unlock(&ir_raw_handler_lock);
667c9ebe DH	318
	319	kfifo_free(&ir->raw->kfifo);
	320	kfree(ir->raw);
	321	ir->raw = NULL;
	322	}
	323
995187be MCC	324	/*
	325	* Extension interface - used to register the IR decoders
	326	*/
	327
	328	int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler)
	329	{
c216369e DH	330	struct ir_raw_event_ctrl *raw;
c216369e DH	331
45a568fa	332	mutex_lock(&ir_raw_handler_lock);
995187be	333	list_add_tail(&ir_raw_handler->list, &ir_raw_handler_list);
c216369e DH	334	if (ir_raw_handler->raw_register)
	335	list_for_each_entry(raw, &ir_raw_client_list, list)
	336	ir_raw_handler->raw_register(raw->input_dev);
667c9ebe	337	available_protocols \|= ir_raw_handler->protocols;
45a568fa	338	mutex_unlock(&ir_raw_handler_lock);
667c9ebe	339
995187be MCC	340	return 0;
	341	}
	342	EXPORT_SYMBOL(ir_raw_handler_register);
	343
	344	void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler)
	345	{
c216369e DH	346	struct ir_raw_event_ctrl *raw;
c216369e DH	347
45a568fa	348	mutex_lock(&ir_raw_handler_lock);
995187be	349	list_del(&ir_raw_handler->list);
c216369e DH	350	if (ir_raw_handler->raw_unregister)
	351	list_for_each_entry(raw, &ir_raw_client_list, list)
	352	ir_raw_handler->raw_unregister(raw->input_dev);
667c9ebe	353	available_protocols &= ~ir_raw_handler->protocols;
45a568fa	354	mutex_unlock(&ir_raw_handler_lock);
995187be MCC	355	}
	356	EXPORT_SYMBOL(ir_raw_handler_unregister);
	357
5fa2989f	358	#ifdef MODULE
995187be MCC	359	static void init_decoders(struct work_struct *work)
	360	{
	361	/* Load the decoder modules */
	362
	363	load_nec_decode();
db1423a6	364	load_rc5_decode();
784a4931	365	load_rc6_decode();
bf670f64	366	load_jvc_decode();
3fe29c89	367	load_sony_decode();
ca414698	368	load_lirc_codec();
995187be MCC	369
	370	/* If needed, we may later add some init code. In this case,
	371	it is needed to change the CONFIG_MODULE test at ir-core.h
	372	*/
	373	}
5fa2989f	374	#endif
995187be MCC	375
	376	void ir_raw_init(void)
	377	{
93c312ff	378	#ifdef MODULE
995187be MCC	379	INIT_WORK(&wq_load, init_decoders);
995187be MCC	380	schedule_work(&wq_load);
93c312ff MCC	381	#endif
93c312ff MCC	382	}