1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* 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 <acpi/acevents.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;
ACPI_FUNCTION_TRACE("acpi_enable_wakeup_device_prep");
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
*/
ACPI_FUNCTION_TRACE("acpi_enable_wakeup_device");
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;
ACPI_FUNCTION_TRACE("acpi_disable_wakeup_device");
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);
|
