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1/*
2 * pm_wakeup.h - Power management wakeup interface
3 *
4 * Copyright (C) 2008 Alan Stern
5 * Copyright (C) 2010 Rafael J. Wysocki, Novell Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#ifndef _LINUX_PM_WAKEUP_H
23#define _LINUX_PM_WAKEUP_H
24
25#ifndef _DEVICE_H_
26# error "please don't include this file directly"
27#endif
28
29#include <linux/types.h>
30
31/**
32 * struct wakeup_source - Representation of wakeup sources
33 *
34 * @total_time: Total time this wakeup source has been active.
35 * @max_time: Maximum time this wakeup source has been continuously active.
36 * @last_time: Monotonic clock when the wakeup source's was activated last time.
37 * @event_count: Number of signaled wakeup events.
38 * @active_count: Number of times the wakeup sorce was activated.
39 * @relax_count: Number of times the wakeup sorce was deactivated.
40 * @hit_count: Number of times the wakeup sorce might abort system suspend.
41 * @active: Status of the wakeup source.
42 */
43struct wakeup_source {
44 char *name;
45 struct list_head entry;
46 spinlock_t lock;
47 struct timer_list timer;
48 unsigned long timer_expires;
49 ktime_t total_time;
50 ktime_t max_time;
51 ktime_t last_time;
52 unsigned long event_count;
53 unsigned long active_count;
54 unsigned long relax_count;
55 unsigned long hit_count;
56 unsigned int active:1;
57};
58
59#ifdef CONFIG_PM_SLEEP
60
61/*
62 * Changes to device_may_wakeup take effect on the next pm state change.
63 */
64
65static inline bool device_can_wakeup(struct device *dev)
66{
67 return dev->power.can_wakeup;
68}
69
70static inline bool device_may_wakeup(struct device *dev)
71{
72 return dev->power.can_wakeup && !!dev->power.wakeup;
73}
74
75/* drivers/base/power/wakeup.c */
76extern struct wakeup_source *wakeup_source_create(const char *name);
77extern void wakeup_source_destroy(struct wakeup_source *ws);
78extern void wakeup_source_add(struct wakeup_source *ws);
79extern void wakeup_source_remove(struct wakeup_source *ws);
80extern struct wakeup_source *wakeup_source_register(const char *name);
81extern void wakeup_source_unregister(struct wakeup_source *ws);
82extern int device_wakeup_enable(struct device *dev);
83extern int device_wakeup_disable(struct device *dev);
84extern void device_set_wakeup_capable(struct device *dev, bool capable);
85extern int device_init_wakeup(struct device *dev, bool val);
86extern int device_set_wakeup_enable(struct device *dev, bool enable);
87extern void __pm_stay_awake(struct wakeup_source *ws);
88extern void pm_stay_awake(struct device *dev);
89extern void __pm_relax(struct wakeup_source *ws);
90extern void pm_relax(struct device *dev);
91extern void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec);
92extern void pm_wakeup_event(struct device *dev, unsigned int msec);
93
94#else /* !CONFIG_PM_SLEEP */
95
96static inline void device_set_wakeup_capable(struct device *dev, bool capable)
97{
98 dev->power.can_wakeup = capable;
99}
100
101static inline bool device_can_wakeup(struct device *dev)
102{
103 return dev->power.can_wakeup;
104}
105
106static inline struct wakeup_source *wakeup_source_create(const char *name)
107{
108 return NULL;
109}
110
111static inline void wakeup_source_destroy(struct wakeup_source *ws) {}
112
113static inline void wakeup_source_add(struct wakeup_source *ws) {}
114
115static inline void wakeup_source_remove(struct wakeup_source *ws) {}
116
117static inline struct wakeup_source *wakeup_source_register(const char *name)
118{
119 return NULL;
120}
121
122static inline void wakeup_source_unregister(struct wakeup_source *ws) {}
123
124static inline int device_wakeup_enable(struct device *dev)
125{
126 dev->power.should_wakeup = true;
127 return 0;
128}
129
130static inline int device_wakeup_disable(struct device *dev)
131{
132 dev->power.should_wakeup = false;
133 return 0;
134}
135
136static inline int device_set_wakeup_enable(struct device *dev, bool enable)
137{
138 dev->power.should_wakeup = enable;
139 return 0;
140}
141
142static inline int device_init_wakeup(struct device *dev, bool val)
143{
144 device_set_wakeup_capable(dev, val);
145 device_set_wakeup_enable(dev, val);
146 return 0;
147}
148
149static inline bool device_may_wakeup(struct device *dev)
150{
151 return dev->power.can_wakeup && dev->power.should_wakeup;
152}
153
154static inline void __pm_stay_awake(struct wakeup_source *ws) {}
155
156static inline void pm_stay_awake(struct device *dev) {}
157
158static inline void __pm_relax(struct wakeup_source *ws) {}
159
160static inline void pm_relax(struct device *dev) {}
161
162static inline void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec) {}
163
164static inline void pm_wakeup_event(struct device *dev, unsigned int msec) {}
165
166#endif /* !CONFIG_PM_SLEEP */
167
168#endif /* _LINUX_PM_WAKEUP_H */