[GitHub/mt8127/android_kernel_alcatel_ttab.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 "sleep.h"

#define _COMPONENT		ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("wakeup_devices")

extern struct list_head acpi_wakeup_device_list;
extern spinlock_t acpi_device_lock;

/**
 * acpi_enable_wakeup_device_prep - prepare wakeup devices
 *	@sleep_state:	ACPI state
 * Enable all wakup devices power if the devices' wakeup level
 * is higher than requested sleep level
 */

void acpi_enable_wakeup_device_prep(u8 sleep_state)
{
	struct list_head *node, *next;

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

		spin_unlock(&acpi_device_lock);
		acpi_enable_wakeup_device_power(dev, sleep_state);
		spin_lock(&acpi_device_lock);
	}
	spin_unlock(&acpi_device_lock);
}

/**
 * acpi_enable_wakeup_device - enable wakeup devices
 *	@sleep_state:	ACPI state
 * Enable all wakup devices's GPE
 */
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
	 */
	spin_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.valid)
			continue;

		/* If users want to disable run-wake GPE,
		 * we only disable it for wake and leave it for runtime
		 */
		if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
		    || sleep_state > (u32) dev->wakeup.sleep_state) {
			if (dev->wakeup.flags.run_wake) {
				spin_unlock(&acpi_device_lock);
				/* set_gpe_type will disable GPE, leave it like that */
				acpi_set_gpe_type(dev->wakeup.gpe_device,
						  dev->wakeup.gpe_number,
						  ACPI_GPE_TYPE_RUNTIME);
				spin_lock(&acpi_device_lock);
			}
			continue;
		}
		spin_unlock(&acpi_device_lock);
		if (!dev->wakeup.flags.run_wake)
			acpi_enable_gpe(dev->wakeup.gpe_device,
					dev->wakeup.gpe_number);
		spin_lock(&acpi_device_lock);
	}
	spin_unlock(&acpi_device_lock);
}

/**
 * acpi_disable_wakeup_device - disable devices' wakeup capability
 *	@sleep_state:	ACPI state
 * Disable all wakup devices's GPE and wakeup capability
 */
void acpi_disable_wakeup_device(u8 sleep_state)
{
	struct list_head *node, *next;

	spin_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.valid)
			continue;

		if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
		    || sleep_state > (u32) dev->wakeup.sleep_state) {
			if (dev->wakeup.flags.run_wake) {
				spin_unlock(&acpi_device_lock);
				acpi_set_gpe_type(dev->wakeup.gpe_device,
						  dev->wakeup.gpe_number,
						  ACPI_GPE_TYPE_WAKE_RUN);
				/* Re-enable it, since set_gpe_type will disable it */
				acpi_enable_gpe(dev->wakeup.gpe_device,
						dev->wakeup.gpe_number);
				spin_lock(&acpi_device_lock);
			}
			continue;
		}

		spin_unlock(&acpi_device_lock);
		acpi_disable_wakeup_device_power(dev);
		/* Never disable run-wake GPE */
		if (!dev->wakeup.flags.run_wake) {
			acpi_disable_gpe(dev->wakeup.gpe_device,
					 dev->wakeup.gpe_number);
			acpi_clear_gpe(dev->wakeup.gpe_device,
				       dev->wakeup.gpe_number, ACPI_NOT_ISR);
		}
		spin_lock(&acpi_device_lock);
	}
	spin_unlock(&acpi_device_lock);
}

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

	if (acpi_disabled)
		return 0;

	spin_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);
		/* In case user doesn't load button driver */
		if (!dev->wakeup.flags.run_wake || dev->wakeup.state.enabled)
			continue;
		spin_unlock(&acpi_device_lock);
		acpi_set_gpe_type(dev->wakeup.gpe_device,
				  dev->wakeup.gpe_number,
				  ACPI_GPE_TYPE_WAKE_RUN);
		acpi_enable_gpe(dev->wakeup.gpe_device,
				dev->wakeup.gpe_number);
		dev->wakeup.state.enabled = 1;
		spin_lock(&acpi_device_lock);
	}
	spin_unlock(&acpi_device_lock);
	return 0;
}

late_initcall(acpi_wakeup_device_init);
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>
1da177e4 LT	11	#include "sleep.h"
	12
	13	#define _COMPONENT ACPI_SYSTEM_COMPONENT
4be44fcd	14	ACPI_MODULE_NAME("wakeup_devices")
1da177e4	15
4be44fcd	16	extern struct list_head acpi_wakeup_device_list;
1da177e4 LT	17	extern spinlock_t acpi_device_lock;
1da177e4 LT	18
1da177e4 LT	19	/**
	20	* acpi_enable_wakeup_device_prep - prepare wakeup devices
	21	* @sleep_state: ACPI state
	22	* Enable all wakup devices power if the devices' wakeup level
	23	* is higher than requested sleep level
	24	*/
	25
4be44fcd	26	void acpi_enable_wakeup_device_prep(u8 sleep_state)
1da177e4	27	{
4be44fcd	28	struct list_head node, next;
1da177e4	29
1da177e4 LT	30	spin_lock(&acpi_device_lock);
1da177e4 LT	31	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
4be44fcd LB	32	struct acpi_device *dev = container_of(node,
	33	struct acpi_device,
	34	wakeup_list);
	35
	36	if (!dev->wakeup.flags.valid \|\|
	37	!dev->wakeup.state.enabled \|\|
	38	(sleep_state > (u32) dev->wakeup.sleep_state))
1da177e4 LT	39	continue;
	40
	41	spin_unlock(&acpi_device_lock);
77e76609	42	acpi_enable_wakeup_device_power(dev, sleep_state);
1da177e4 LT	43	spin_lock(&acpi_device_lock);
	44	}
	45	spin_unlock(&acpi_device_lock);
	46	}
	47
	48	/**
	49	* acpi_enable_wakeup_device - enable wakeup devices
	50	* @sleep_state: ACPI state
	51	* Enable all wakup devices's GPE
	52	*/
4be44fcd	53	void acpi_enable_wakeup_device(u8 sleep_state)
1da177e4	54	{
4be44fcd	55	struct list_head node, next;
1da177e4 LT	56
	57	/*
	58	* Caution: this routine must be invoked when interrupt is disabled
	59	* Refer ACPI2.0: P212
	60	*/
1da177e4 LT	61	spin_lock(&acpi_device_lock);
1da177e4 LT	62	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
9b039330 AS	63	struct acpi_device *dev =
9b039330 AS	64	container_of(node, struct acpi_device, wakeup_list);
eb9d0fe4	65
9b039330 AS	66	if (!dev->wakeup.flags.valid)
9b039330 AS	67	continue;
eb9d0fe4	68
1da177e4 LT	69	/* If users want to disable run-wake GPE,
	70	* we only disable it for wake and leave it for runtime
	71	*/
eb9d0fe4 RW	72	if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
eb9d0fe4 RW	73	\|\| sleep_state > (u32) dev->wakeup.sleep_state) {
9b039330 AS	74	if (dev->wakeup.flags.run_wake) {
	75	spin_unlock(&acpi_device_lock);
	76	/* set_gpe_type will disable GPE, leave it like that */
	77	acpi_set_gpe_type(dev->wakeup.gpe_device,
	78	dev->wakeup.gpe_number,
	79	ACPI_GPE_TYPE_RUNTIME);
	80	spin_lock(&acpi_device_lock);
	81	}
1da177e4 LT	82	continue;
1da177e4 LT	83	}
1da177e4	84	spin_unlock(&acpi_device_lock);
1da177e4	85	if (!dev->wakeup.flags.run_wake)
4be44fcd	86	acpi_enable_gpe(dev->wakeup.gpe_device,
0b7084ac	87	dev->wakeup.gpe_number);
1da177e4 LT	88	spin_lock(&acpi_device_lock);
	89	}
	90	spin_unlock(&acpi_device_lock);
	91	}
	92
	93	/**
	94	* acpi_disable_wakeup_device - disable devices' wakeup capability
	95	* @sleep_state: ACPI state
	96	* Disable all wakup devices's GPE and wakeup capability
	97	*/
4be44fcd	98	void acpi_disable_wakeup_device(u8 sleep_state)
1da177e4	99	{
4be44fcd	100	struct list_head node, next;
1da177e4	101
1da177e4 LT	102	spin_lock(&acpi_device_lock);
1da177e4 LT	103	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
9b039330 AS	104	struct acpi_device *dev =
9b039330 AS	105	container_of(node, struct acpi_device, wakeup_list);
1da177e4	106
9b039330	107	if (!dev->wakeup.flags.valid)
1da177e4	108	continue;
eb9d0fe4 RW	109
	110	if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
	111	\|\| sleep_state > (u32) dev->wakeup.sleep_state) {
9b039330 AS	112	if (dev->wakeup.flags.run_wake) {
	113	spin_unlock(&acpi_device_lock);
	114	acpi_set_gpe_type(dev->wakeup.gpe_device,
	115	dev->wakeup.gpe_number,
	116	ACPI_GPE_TYPE_WAKE_RUN);
	117	/* Re-enable it, since set_gpe_type will disable it */
	118	acpi_enable_gpe(dev->wakeup.gpe_device,
0b7084ac	119	dev->wakeup.gpe_number);
9b039330 AS	120	spin_lock(&acpi_device_lock);
9b039330 AS	121	}
1da177e4	122	continue;
9b039330	123	}
1da177e4 LT	124
	125	spin_unlock(&acpi_device_lock);
	126	acpi_disable_wakeup_device_power(dev);
	127	/* Never disable run-wake GPE */
	128	if (!dev->wakeup.flags.run_wake) {
4be44fcd	129	acpi_disable_gpe(dev->wakeup.gpe_device,
0b7084ac	130	dev->wakeup.gpe_number);
4be44fcd LB	131	acpi_clear_gpe(dev->wakeup.gpe_device,
4be44fcd LB	132	dev->wakeup.gpe_number, ACPI_NOT_ISR);
1da177e4	133	}
1da177e4 LT	134	spin_lock(&acpi_device_lock);
	135	}
	136	spin_unlock(&acpi_device_lock);
	137	}
	138
	139	static int __init acpi_wakeup_device_init(void)
	140	{
4be44fcd	141	struct list_head node, next;
1da177e4 LT	142
	143	if (acpi_disabled)
	144	return 0;
1da177e4 LT	145
	146	spin_lock(&acpi_device_lock);
	147	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
4be44fcd LB	148	struct acpi_device *dev = container_of(node,
	149	struct acpi_device,
	150	wakeup_list);
1da177e4	151	/* In case user doesn't load button driver */
9b039330 AS	152	if (!dev->wakeup.flags.run_wake \|\| dev->wakeup.state.enabled)
	153	continue;
	154	spin_unlock(&acpi_device_lock);
	155	acpi_set_gpe_type(dev->wakeup.gpe_device,
	156	dev->wakeup.gpe_number,
	157	ACPI_GPE_TYPE_WAKE_RUN);
	158	acpi_enable_gpe(dev->wakeup.gpe_device,
0b7084ac	159	dev->wakeup.gpe_number);
9b039330 AS	160	dev->wakeup.state.enabled = 1;
9b039330 AS	161	spin_lock(&acpi_device_lock);
1da177e4 LT	162	}
1da177e4 LT	163	spin_unlock(&acpi_device_lock);
1da177e4 LT	164	return 0;
	165	}
	166
	167	late_initcall(acpi_wakeup_device_init);