[net-next-2.6.git] / drivers / acpi / wakeup.c

/*
 * wakeup.c - support wakeup devices
 * Copyright (C) 2004 Li Shaohua <shaohua.li@intel.com>
 */

#include <linux/init.h>
#include <linux/acpi.h>
#include <acpi/acpi_drivers.h>
#include <linux/kernel.h>
#include <linux/types.h>

#include "internal.h"
#include "sleep.h"

/*
 * We didn't lock acpi_device_lock in the file, because it invokes oops in
 * suspend/resume and isn't really required as this is called in S-state. At
 * that time, there is no device hotplug
 **/
#define _COMPONENT		ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("wakeup_devices")

/**
 * acpi_enable_wakeup_devices - Enable wake-up device GPEs.
 * @sleep_state: ACPI system sleep state.
 *
 * Enable wakeup device power of devices with the state.enable flag set and set
 * the wakeup enable mask bits in the GPE registers that correspond to wakeup
 * devices.
 */
void acpi_enable_wakeup_devices(u8 sleep_state)
{
	struct list_head *node, *next;

	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
		struct acpi_device *dev =
			container_of(node, struct acpi_device, wakeup_list);

		if (!dev->wakeup.flags.valid || !dev->wakeup.state.enabled
		    || sleep_state > (u32) dev->wakeup.sleep_state)
			continue;

		if (dev->wakeup.state.enabled)
			acpi_enable_wakeup_device_power(dev, sleep_state);

		/* The wake-up power should have been enabled already. */
		acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
				ACPI_GPE_TYPE_WAKE);
	}
}

/**
 * acpi_disable_wakeup_devices - Disable devices' wakeup capability.
 * @sleep_state: ACPI system sleep state.
 */
void acpi_disable_wakeup_devices(u8 sleep_state)
{
	struct list_head *node, *next;

	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
		struct acpi_device *dev =
			container_of(node, struct acpi_device, wakeup_list);

		if (!dev->wakeup.flags.valid || !dev->wakeup.state.enabled
		    || (sleep_state > (u32) dev->wakeup.sleep_state))
			continue;

		acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
				ACPI_GPE_TYPE_WAKE);
		acpi_disable_wakeup_device_power(dev);
	}
}

int __init acpi_wakeup_device_init(void)
{
	struct list_head *node, *next;

	mutex_lock(&acpi_device_lock);
	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
		struct acpi_device *dev = container_of(node,
						       struct acpi_device,
						       wakeup_list);
		if (dev->wakeup.flags.always_enabled)
			dev->wakeup.state.enabled = 1;
	}
	mutex_unlock(&acpi_device_lock);
	return 0;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* wakeup.c - support wakeup devices
	3	* Copyright (C) 2004 Li Shaohua <shaohua.li@intel.com>
	4	*/
	5
	6	#include <linux/init.h>
	7	#include <linux/acpi.h>
	8	#include <acpi/acpi_drivers.h>
	9	#include <linux/kernel.h>
	10	#include <linux/types.h>
e60cc7a6 BH	11
e60cc7a6 BH	12	#include "internal.h"
1da177e4 LT	13	#include "sleep.h"
1da177e4 LT	14
9090589d SL	15	/*
	16	* We didn't lock acpi_device_lock in the file, because it invokes oops in
	17	* suspend/resume and isn't really required as this is called in S-state. At
	18	* that time, there is no device hotplug
	19	**/
1da177e4	20	#define _COMPONENT ACPI_SYSTEM_COMPONENT
4be44fcd	21	ACPI_MODULE_NAME("wakeup_devices")
1da177e4	22
1da177e4	23	/**
78f5f023	24	* acpi_enable_wakeup_devices - Enable wake-up device GPEs.
9630bdd9 RW	25	* @sleep_state: ACPI system sleep state.
9630bdd9 RW	26	*
78f5f023 RW	27	* Enable wakeup device power of devices with the state.enable flag set and set
	28	* the wakeup enable mask bits in the GPE registers that correspond to wakeup
	29	* devices.
1da177e4	30	*/
78f5f023	31	void acpi_enable_wakeup_devices(u8 sleep_state)
1da177e4	32	{
4be44fcd	33	struct list_head node, next;
1da177e4	34
1da177e4	35	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
9b039330 AS	36	struct acpi_device *dev =
9b039330 AS	37	container_of(node, struct acpi_device, wakeup_list);
eb9d0fe4	38
cb1cb178	39	if (!dev->wakeup.flags.valid \|\| !dev->wakeup.state.enabled
9630bdd9	40	\|\| sleep_state > (u32) dev->wakeup.sleep_state)
1da177e4	41	continue;
9630bdd9	42
78f5f023 RW	43	if (dev->wakeup.state.enabled)
	44	acpi_enable_wakeup_device_power(dev, sleep_state);
	45
9630bdd9	46	/* The wake-up power should have been enabled already. */
cb1cb178 RW	47	acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
cb1cb178 RW	48	ACPI_GPE_TYPE_WAKE);
1da177e4	49	}
1da177e4 LT	50	}
	51
	52	/**
78f5f023	53	* acpi_disable_wakeup_devices - Disable devices' wakeup capability.
9630bdd9	54	* @sleep_state: ACPI system sleep state.
1da177e4	55	*/
78f5f023	56	void acpi_disable_wakeup_devices(u8 sleep_state)
1da177e4	57	{
4be44fcd	58	struct list_head node, next;
1da177e4	59
1da177e4	60	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
9b039330 AS	61	struct acpi_device *dev =
9b039330 AS	62	container_of(node, struct acpi_device, wakeup_list);
1da177e4	63
9630bdd9 RW	64	if (!dev->wakeup.flags.valid \|\| !dev->wakeup.state.enabled
9630bdd9 RW	65	\|\| (sleep_state > (u32) dev->wakeup.sleep_state))
1da177e4 LT	66	continue;
1da177e4 LT	67
cb1cb178 RW	68	acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
cb1cb178 RW	69	ACPI_GPE_TYPE_WAKE);
1da177e4	70	acpi_disable_wakeup_device_power(dev);
1da177e4	71	}
1da177e4 LT	72	}
1da177e4 LT	73
201b8c65	74	int __init acpi_wakeup_device_init(void)
1da177e4	75	{
4be44fcd	76	struct list_head node, next;
1da177e4	77
9090589d	78	mutex_lock(&acpi_device_lock);
1da177e4	79	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
4be44fcd LB	80	struct acpi_device *dev = container_of(node,
	81	struct acpi_device,
	82	wakeup_list);
cb1cb178 RW	83	if (dev->wakeup.flags.always_enabled)
cb1cb178 RW	84	dev->wakeup.state.enabled = 1;
1da177e4	85	}
9090589d	86	mutex_unlock(&acpi_device_lock);
1da177e4 LT	87	return 0;
1da177e4 LT	88	}