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>
11
12#include "internal.h"
13#include "sleep.h"
14
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 **/
20#define _COMPONENT		ACPI_SYSTEM_COMPONENT
21ACPI_MODULE_NAME("wakeup_devices")
22
23/**
24 * acpi_enable_wakeup_devices - Enable wake-up device GPEs.
25 * @sleep_state: ACPI system sleep state.
26 *
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.
30 */
31void acpi_enable_wakeup_devices(u8 sleep_state)
32{
33	struct list_head *node, *next;
34
35	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
36		struct acpi_device *dev =
37			container_of(node, struct acpi_device, wakeup_list);
38
39		if (!dev->wakeup.flags.valid
40		    || sleep_state > (u32) dev->wakeup.sleep_state
41		    || !(device_may_wakeup(&dev->dev)
42		        || dev->wakeup.prepare_count))
43			continue;
44
45		if (device_may_wakeup(&dev->dev))
46			acpi_enable_wakeup_device_power(dev, sleep_state);
47
48		/* The wake-up power should have been enabled already. */
49		acpi_set_gpe_wake_mask(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
50				ACPI_GPE_ENABLE);
51	}
52}
53
54/**
55 * acpi_disable_wakeup_devices - Disable devices' wakeup capability.
56 * @sleep_state: ACPI system sleep state.
57 */
58void acpi_disable_wakeup_devices(u8 sleep_state)
59{
60	struct list_head *node, *next;
61
62	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
63		struct acpi_device *dev =
64			container_of(node, struct acpi_device, wakeup_list);
65
66		if (!dev->wakeup.flags.valid
67		    || sleep_state > (u32) dev->wakeup.sleep_state
68		    || !(device_may_wakeup(&dev->dev)
69		        || dev->wakeup.prepare_count))
70			continue;
71
72		acpi_set_gpe_wake_mask(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
73				ACPI_GPE_DISABLE);
74
75		if (device_may_wakeup(&dev->dev))
76			acpi_disable_wakeup_device_power(dev);
77	}
78}
79
80int __init acpi_wakeup_device_init(void)
81{
82	struct list_head *node, *next;
83
84	mutex_lock(&acpi_device_lock);
85	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
86		struct acpi_device *dev = container_of(node,
87						       struct acpi_device,
88						       wakeup_list);
89		if (device_can_wakeup(&dev->dev)) {
90			/* Button GPEs are supposed to be always enabled. */
91			acpi_enable_gpe(dev->wakeup.gpe_device,
92					dev->wakeup.gpe_number);
93			device_set_wakeup_enable(&dev->dev, true);
94		}
95	}
96	mutex_unlock(&acpi_device_lock);
97	return 0;
98}

 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 <linux/kernel.h>
 9#include <linux/types.h>
10
11#include "internal.h"
12#include "sleep.h"
13
14/*
15 * We didn't lock acpi_device_lock in the file, because it invokes oops in
16 * suspend/resume and isn't really required as this is called in S-state. At
17 * that time, there is no device hotplug
18 **/
19#define _COMPONENT		ACPI_SYSTEM_COMPONENT
20ACPI_MODULE_NAME("wakeup_devices")
21
22/**
23 * acpi_enable_wakeup_devices - Enable wake-up device GPEs.
24 * @sleep_state: ACPI system sleep state.
25 *
26 * Enable wakeup device power of devices with the state.enable flag set and set
27 * the wakeup enable mask bits in the GPE registers that correspond to wakeup
28 * devices.
29 */
30void acpi_enable_wakeup_devices(u8 sleep_state)
31{
32	struct list_head *node, *next;
33
34	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
35		struct acpi_device *dev =
36			container_of(node, struct acpi_device, wakeup_list);
37
38		if (!dev->wakeup.flags.valid
39		    || sleep_state > (u32) dev->wakeup.sleep_state
40		    || !(device_may_wakeup(&dev->dev)
41		        || dev->wakeup.prepare_count))
42			continue;
43
44		if (device_may_wakeup(&dev->dev))
45			acpi_enable_wakeup_device_power(dev, sleep_state);
46
47		/* The wake-up power should have been enabled already. */
48		acpi_set_gpe_wake_mask(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
49				ACPI_GPE_ENABLE);
50	}
51}
52
53/**
54 * acpi_disable_wakeup_devices - Disable devices' wakeup capability.
55 * @sleep_state: ACPI system sleep state.
56 */
57void acpi_disable_wakeup_devices(u8 sleep_state)
58{
59	struct list_head *node, *next;
60
61	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
62		struct acpi_device *dev =
63			container_of(node, struct acpi_device, wakeup_list);
64
65		if (!dev->wakeup.flags.valid
66		    || sleep_state > (u32) dev->wakeup.sleep_state
67		    || !(device_may_wakeup(&dev->dev)
68		        || dev->wakeup.prepare_count))
69			continue;
70
71		acpi_set_gpe_wake_mask(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
72				ACPI_GPE_DISABLE);
73
74		if (device_may_wakeup(&dev->dev))
75			acpi_disable_wakeup_device_power(dev);
76	}
77}
78
79int __init acpi_wakeup_device_init(void)
80{
81	struct list_head *node, *next;
82
83	mutex_lock(&acpi_device_lock);
84	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
85		struct acpi_device *dev = container_of(node,
86						       struct acpi_device,
87						       wakeup_list);
88		if (device_can_wakeup(&dev->dev)) {
89			/* Button GPEs are supposed to be always enabled. */
90			acpi_enable_gpe(dev->wakeup.gpe_device,
91					dev->wakeup.gpe_number);
92			device_set_wakeup_enable(&dev->dev, true);
93		}
94	}
95	mutex_unlock(&acpi_device_lock);
96	return 0;
97}