mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-14 16:23:51 +08:00
80 lines
1.8 KiB
C
80 lines
1.8 KiB
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>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Codec families have names seperated by commas, so we search for an
|
||
|
|
* individual codec name within the family string.
|
||
|
|
*/
|
||
|
|
static int ac97_bus_match(struct device *dev, struct device_driver *drv)
|
||
|
|
{
|
||
|
|
return (strstr(dev->bus_id, drv->name) != NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
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, SUSPEND_DISABLE);
|
||
|
|
if (ret == 0)
|
||
|
|
ret = dev->driver->suspend(dev, state, SUSPEND_SAVE_STATE);
|
||
|
|
if (ret == 0)
|
||
|
|
ret = dev->driver->suspend(dev, state, SUSPEND_POWER_DOWN);
|
||
|
|
}
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ac97_bus_resume(struct device *dev)
|
||
|
|
{
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
if (dev->driver && dev->driver->resume) {
|
||
|
|
ret = dev->driver->resume(dev, RESUME_POWER_ON);
|
||
|
|
if (ret == 0)
|
||
|
|
ret = dev->driver->resume(dev, RESUME_RESTORE_STATE);
|
||
|
|
if (ret == 0)
|
||
|
|
ret = dev->driver->resume(dev, RESUME_ENABLE);
|
||
|
|
}
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct bus_type ac97_bus_type = {
|
||
|
|
.name = "ac97",
|
||
|
|
.match = ac97_bus_match,
|
||
|
|
.suspend = ac97_bus_suspend,
|
||
|
|
.resume = ac97_bus_resume,
|
||
|
|
};
|
||
|
|
|
||
|
|
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");
|