[net-next-2.6.git] / drivers / media / IR / rc-map.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 <media/ir-core.h>
#include <linux/spinlock.h>

/* Used to handle IR raw handler extensions */
static LIST_HEAD(rc_map_list);
static spinlock_t rc_map_lock;


static struct rc_keymap *seek_rc_map(const char *name)
{
	struct rc_keymap *map = NULL;

	spin_lock(&rc_map_lock);
	list_for_each_entry(map, &rc_map_list, list) {
		if (!strcmp(name, map->map.name)) {
			spin_unlock(&rc_map_lock);
			return map;
		}
	}
	spin_unlock(&rc_map_lock);

	return NULL;
}

struct ir_scancode_table *get_rc_map(const char *name)
{
	int rc = 0;

	struct rc_keymap *map;

	map = seek_rc_map(name);
#ifdef MODULE
	if (!map) {
		rc = request_module(name);
		if (rc < 0) {
			printk(KERN_ERR "Couldn't load IR keymap %s\n", name);
			return NULL;
		}
		msleep(20);	/* Give some time for IR to register */

		map = seek_rc_map(name);
	}
#endif
	if (!map) {
		printk(KERN_ERR "IR keymap %s not found\n", name);
		return NULL;
	}

	printk(KERN_INFO "Registered IR keymap %s\n", map->map.name);

	return &map->map;
}
EXPORT_SYMBOL_GPL(get_rc_map);

int ir_register_map(struct rc_keymap *map)
{
	spin_lock(&rc_map_lock);
	list_add_tail(&map->list, &rc_map_list);
	spin_unlock(&rc_map_lock);
	return 0;
}
EXPORT_SYMBOL_GPL(ir_register_map);

void ir_unregister_map(struct rc_keymap *map)
{
	spin_lock(&rc_map_lock);
	list_del(&map->list);
	spin_unlock(&rc_map_lock);
}
EXPORT_SYMBOL_GPL(ir_unregister_map);

void rc_map_init(void)
{
	spin_lock_init(&rc_map_lock);

}
Commit	Line	Data
9ce50c1a 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
	15	#include <media/ir-core.h>
	16	#include <linux/spinlock.h>
	17
	18	/* Used to handle IR raw handler extensions */
	19	static LIST_HEAD(rc_map_list);
	20	static spinlock_t rc_map_lock;
	21
	22
	23	static struct rc_keymap seek_rc_map(const char name)
	24	{
	25	struct rc_keymap *map = NULL;
	26
	27	spin_lock(&rc_map_lock);
	28	list_for_each_entry(map, &rc_map_list, list) {
02858eed MCC	29	if (!strcmp(name, map->map.name)) {
	30	spin_unlock(&rc_map_lock);
	31	return map;
	32	}
9ce50c1a MCC	33	}
	34	spin_unlock(&rc_map_lock);
	35
02858eed	36	return NULL;
9ce50c1a MCC	37	}
	38
	39	struct ir_scancode_table get_rc_map(const char name)
	40	{
	41	int rc = 0;
	42
	43	struct rc_keymap *map;
	44
	45	map = seek_rc_map(name);
	46	#ifdef MODULE
	47	if (!map) {
02858eed MCC	48	rc = request_module(name);
	49	if (rc < 0) {
	50	printk(KERN_ERR "Couldn't load IR keymap %s\n", name);
9ce50c1a	51	return NULL;
02858eed MCC	52	}
02858eed MCC	53	msleep(20); /* Give some time for IR to register */
9ce50c1a MCC	54
	55	map = seek_rc_map(name);
	56	}
	57	#endif
02858eed MCC	58	if (!map) {
02858eed MCC	59	printk(KERN_ERR "IR keymap %s not found\n", name);
9ce50c1a	60	return NULL;
02858eed MCC	61	}
	62
	63	printk(KERN_INFO "Registered IR keymap %s\n", map->map.name);
9ce50c1a MCC	64
	65	return &map->map;
	66	}
	67	EXPORT_SYMBOL_GPL(get_rc_map);
	68
	69	int ir_register_map(struct rc_keymap *map)
	70	{
	71	spin_lock(&rc_map_lock);
	72	list_add_tail(&map->list, &rc_map_list);
	73	spin_unlock(&rc_map_lock);
	74	return 0;
	75	}
6686fa69	76	EXPORT_SYMBOL_GPL(ir_register_map);
9ce50c1a MCC	77
	78	void ir_unregister_map(struct rc_keymap *map)
	79	{
	80	spin_lock(&rc_map_lock);
	81	list_del(&map->list);
	82	spin_unlock(&rc_map_lock);
	83	}
6686fa69	84	EXPORT_SYMBOL_GPL(ir_unregister_map);
02858eed MCC	85
	86	void rc_map_init(void)
	87	{
	88	spin_lock_init(&rc_map_lock);
	89
	90	}