[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_device_prep - Prepare wake-up devices.
 * @sleep_state: ACPI system sleep state.
 *
 * Enable all wake-up devices' power, unless the requested system sleep state is
 * too deep.
 */
void acpi_enable_wakeup_device_prep(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_enable_wakeup_device_power(dev, sleep_state);
	}
}

/**
 * acpi_enable_wakeup_device - Enable wake-up device GPEs.
 * @sleep_state: ACPI system sleep state.
 *
 * Enable all wake-up devices' GPEs, with the assumption that
 * acpi_disable_all_gpes() was executed before, so we don't need to disable any
 * GPEs here.
 */
void acpi_enable_wakeup_device(u8 sleep_state)
{
	struct list_head *node, *next;

	/* 
	 * Caution: this routine must be invoked when interrupt is disabled 
	 * Refer ACPI2.0: P212
	 */
	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;

		/* 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_device - Disable devices' wakeup capability.
 * @sleep_state: ACPI system sleep state.
 *
 * This function only affects devices with wakeup.state.enabled set, which means
 * that it reverses the changes made by acpi_enable_wakeup_device_prep().
 */
void acpi_disable_wakeup_device(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	/**
9630bdd9 RW	24	* acpi_enable_wakeup_device_prep - Prepare wake-up devices.
	25	* @sleep_state: ACPI system sleep state.
	26	*
	27	* Enable all wake-up devices' power, unless the requested system sleep state is
	28	* too deep.
1da177e4	29	*/
4be44fcd	30	void acpi_enable_wakeup_device_prep(u8 sleep_state)
1da177e4	31	{
4be44fcd	32	struct list_head node, next;
1da177e4	33
1da177e4	34	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
4be44fcd LB	35	struct acpi_device *dev = container_of(node,
	36	struct acpi_device,
	37	wakeup_list);
	38
9630bdd9 RW	39	if (!dev->wakeup.flags.valid \|\| !dev->wakeup.state.enabled
9630bdd9 RW	40	\|\| (sleep_state > (u32) dev->wakeup.sleep_state))
1da177e4 LT	41	continue;
1da177e4 LT	42
77e76609	43	acpi_enable_wakeup_device_power(dev, sleep_state);
1da177e4	44	}
1da177e4 LT	45	}
	46
	47	/**
9630bdd9 RW	48	* acpi_enable_wakeup_device - Enable wake-up device GPEs.
	49	* @sleep_state: ACPI system sleep state.
	50	*
	51	* Enable all wake-up devices' GPEs, with the assumption that
	52	* acpi_disable_all_gpes() was executed before, so we don't need to disable any
	53	* GPEs here.
1da177e4	54	*/
4be44fcd	55	void acpi_enable_wakeup_device(u8 sleep_state)
1da177e4	56	{
4be44fcd	57	struct list_head node, next;
1da177e4 LT	58
	59	/*
	60	* Caution: this routine must be invoked when interrupt is disabled
	61	* Refer ACPI2.0: P212
	62	*/
1da177e4	63	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
9b039330 AS	64	struct acpi_device *dev =
9b039330 AS	65	container_of(node, struct acpi_device, wakeup_list);
eb9d0fe4	66
cb1cb178	67	if (!dev->wakeup.flags.valid \|\| !dev->wakeup.state.enabled
9630bdd9	68	\|\| sleep_state > (u32) dev->wakeup.sleep_state)
1da177e4	69	continue;
9630bdd9 RW	70
9630bdd9 RW	71	/* The wake-up power should have been enabled already. */
cb1cb178 RW	72	acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
cb1cb178 RW	73	ACPI_GPE_TYPE_WAKE);
1da177e4	74	}
1da177e4 LT	75	}
	76
	77	/**
9630bdd9 RW	78	* acpi_disable_wakeup_device - Disable devices' wakeup capability.
	79	* @sleep_state: ACPI system sleep state.
	80	*
	81	* This function only affects devices with wakeup.state.enabled set, which means
	82	* that it reverses the changes made by acpi_enable_wakeup_device_prep().
1da177e4	83	*/
4be44fcd	84	void acpi_disable_wakeup_device(u8 sleep_state)
1da177e4	85	{
4be44fcd	86	struct list_head node, next;
1da177e4	87
1da177e4	88	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
9b039330 AS	89	struct acpi_device *dev =
9b039330 AS	90	container_of(node, struct acpi_device, wakeup_list);
1da177e4	91
9630bdd9 RW	92	if (!dev->wakeup.flags.valid \|\| !dev->wakeup.state.enabled
9630bdd9 RW	93	\|\| (sleep_state > (u32) dev->wakeup.sleep_state))
1da177e4 LT	94	continue;
1da177e4 LT	95
cb1cb178 RW	96	acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
cb1cb178 RW	97	ACPI_GPE_TYPE_WAKE);
1da177e4	98	acpi_disable_wakeup_device_power(dev);
1da177e4	99	}
1da177e4 LT	100	}
1da177e4 LT	101
201b8c65	102	int __init acpi_wakeup_device_init(void)
1da177e4	103	{
4be44fcd	104	struct list_head node, next;
1da177e4	105
9090589d	106	mutex_lock(&acpi_device_lock);
1da177e4	107	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
4be44fcd LB	108	struct acpi_device *dev = container_of(node,
	109	struct acpi_device,
	110	wakeup_list);
cb1cb178 RW	111	if (dev->wakeup.flags.always_enabled)
cb1cb178 RW	112	dev->wakeup.state.enabled = 1;
1da177e4	113	}
9090589d	114	mutex_unlock(&acpi_device_lock);
1da177e4 LT	115	return 0;
1da177e4 LT	116	}