[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / ac97_bus.c

/*
 * Linux driver model AC97 bus interface
 *
 * Author:	Nicolas Pitre
 * Created:	Jan 14, 2005
 * Copyright:	(C) MontaVista Software Inc.
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/string.h>

/*
 * Let drivers decide whether they want to support given codec from their
 * probe method.  Drivers have direct access to the struct snd_ac97 structure and may
 * decide based on the id field amongst other things.
 */
static int ac97_bus_match(struct device *dev, struct device_driver *drv)
{
	return 1;
}

#ifdef CONFIG_PM
static int ac97_bus_suspend(struct device *dev, pm_message_t state)
{
	int ret = 0;

	if (dev->driver && dev->driver->suspend)
		ret = dev->driver->suspend(dev, state);

	return ret;
}

static int ac97_bus_resume(struct device *dev)
{
	int ret = 0;

	if (dev->driver && dev->driver->resume)
		ret = dev->driver->resume(dev);

	return ret;
}
#endif /* CONFIG_PM */

struct bus_type ac97_bus_type = {
	.name		= "ac97",
	.match		= ac97_bus_match,
#ifdef CONFIG_PM
	.suspend	= ac97_bus_suspend,
	.resume		= ac97_bus_resume,
#endif /* CONFIG_PM */
};

static int __init ac97_bus_init(void)
{
	return bus_register(&ac97_bus_type);
}

subsys_initcall(ac97_bus_init);

static void __exit ac97_bus_exit(void)
{
	bus_unregister(&ac97_bus_type);
}

module_exit(ac97_bus_exit);

EXPORT_SYMBOL(ac97_bus_type);

MODULE_LICENSE("GPL");
Commit	Line	Data
0ca06a00 LG	1	/*
	2	* Linux driver model AC97 bus interface
	3	*
	4	* Author: Nicolas Pitre
	5	* Created: Jan 14, 2005
	6	* Copyright: (C) MontaVista Software Inc.
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*/
	13
5049c35b	14	#include <linux/module.h>
0ca06a00 LG	15	#include <linux/init.h>
	16	#include <linux/device.h>
	17	#include <linux/string.h>
	18
	19	/*
3a91e959	20	* Let drivers decide whether they want to support given codec from their
ee42381e	21	* probe method. Drivers have direct access to the struct snd_ac97 structure and may
3a91e959	22	* decide based on the id field amongst other things.
0ca06a00 LG	23	*/
	24	static int ac97_bus_match(struct device dev, struct device_driver drv)
	25	{
3a91e959	26	return 1;
0ca06a00 LG	27	}
0ca06a00 LG	28
66e27788	29	#ifdef CONFIG_PM
0ca06a00 LG	30	static int ac97_bus_suspend(struct device *dev, pm_message_t state)
	31	{
	32	int ret = 0;
	33
90b66e83	34	if (dev->driver && dev->driver->suspend)
9480e307 RK	35	ret = dev->driver->suspend(dev, state);
9480e307 RK	36
0ca06a00 LG	37	return ret;
	38	}
	39
	40	static int ac97_bus_resume(struct device *dev)
	41	{
	42	int ret = 0;
	43
90b66e83	44	if (dev->driver && dev->driver->resume)
9480e307 RK	45	ret = dev->driver->resume(dev);
9480e307 RK	46
0ca06a00 LG	47	return ret;
0ca06a00 LG	48	}
66e27788	49	#endif /* CONFIG_PM */
0ca06a00 LG	50
	51	struct bus_type ac97_bus_type = {
	52	.name = "ac97",
	53	.match = ac97_bus_match,
66e27788	54	#ifdef CONFIG_PM
0ca06a00 LG	55	.suspend = ac97_bus_suspend,
0ca06a00 LG	56	.resume = ac97_bus_resume,
66e27788	57	#endif /* CONFIG_PM */
0ca06a00 LG	58	};
	59
	60	static int __init ac97_bus_init(void)
	61	{
	62	return bus_register(&ac97_bus_type);
	63	}
	64
	65	subsys_initcall(ac97_bus_init);
	66
	67	static void __exit ac97_bus_exit(void)
	68	{
	69	bus_unregister(&ac97_bus_type);
	70	}
	71
	72	module_exit(ac97_bus_exit);
	73
	74	EXPORT_SYMBOL(ac97_bus_type);
	75
	76	MODULE_LICENSE("GPL");