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TOMOYO Linux Cross Reference
Linux/include/linux/pm_wakeup.h

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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 struct wake_irq;
 32 
 33 /**
 34  * struct wakeup_source - Representation of wakeup sources
 35  *
 36  * @name: Name of the wakeup source
 37  * @entry: Wakeup source list entry
 38  * @lock: Wakeup source lock
 39  * @wakeirq: Optional device specific wakeirq
 40  * @timer: Wakeup timer list
 41  * @timer_expires: Wakeup timer expiration
 42  * @total_time: Total time this wakeup source has been active.
 43  * @max_time: Maximum time this wakeup source has been continuously active.
 44  * @last_time: Monotonic clock when the wakeup source's was touched last time.
 45  * @prevent_sleep_time: Total time this source has been preventing autosleep.
 46  * @event_count: Number of signaled wakeup events.
 47  * @active_count: Number of times the wakeup source was activated.
 48  * @relax_count: Number of times the wakeup source was deactivated.
 49  * @expire_count: Number of times the wakeup source's timeout has expired.
 50  * @wakeup_count: Number of times the wakeup source might abort suspend.
 51  * @active: Status of the wakeup source.
 52  * @has_timeout: The wakeup source has been activated with a timeout.
 53  */
 54 struct wakeup_source {
 55         const char              *name;
 56         struct list_head        entry;
 57         spinlock_t              lock;
 58         struct wake_irq         *wakeirq;
 59         struct timer_list       timer;
 60         unsigned long           timer_expires;
 61         ktime_t total_time;
 62         ktime_t max_time;
 63         ktime_t last_time;
 64         ktime_t start_prevent_time;
 65         ktime_t prevent_sleep_time;
 66         unsigned long           event_count;
 67         unsigned long           active_count;
 68         unsigned long           relax_count;
 69         unsigned long           expire_count;
 70         unsigned long           wakeup_count;
 71         bool                    active:1;
 72         bool                    autosleep_enabled:1;
 73 };
 74 
 75 #ifdef CONFIG_PM_SLEEP
 76 
 77 /*
 78  * Changes to device_may_wakeup take effect on the next pm state change.
 79  */
 80 
 81 static inline bool device_can_wakeup(struct device *dev)
 82 {
 83         return dev->power.can_wakeup;
 84 }
 85 
 86 static inline bool device_may_wakeup(struct device *dev)
 87 {
 88         return dev->power.can_wakeup && !!dev->power.wakeup;
 89 }
 90 
 91 /* drivers/base/power/wakeup.c */
 92 extern void wakeup_source_prepare(struct wakeup_source *ws, const char *name);
 93 extern struct wakeup_source *wakeup_source_create(const char *name);
 94 extern void wakeup_source_drop(struct wakeup_source *ws);
 95 extern void wakeup_source_destroy(struct wakeup_source *ws);
 96 extern void wakeup_source_add(struct wakeup_source *ws);
 97 extern void wakeup_source_remove(struct wakeup_source *ws);
 98 extern struct wakeup_source *wakeup_source_register(const char *name);
 99 extern void wakeup_source_unregister(struct wakeup_source *ws);
100 extern int device_wakeup_enable(struct device *dev);
101 extern int device_wakeup_disable(struct device *dev);
102 extern void device_set_wakeup_capable(struct device *dev, bool capable);
103 extern int device_init_wakeup(struct device *dev, bool val);
104 extern int device_set_wakeup_enable(struct device *dev, bool enable);
105 extern void __pm_stay_awake(struct wakeup_source *ws);
106 extern void pm_stay_awake(struct device *dev);
107 extern void __pm_relax(struct wakeup_source *ws);
108 extern void pm_relax(struct device *dev);
109 extern void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec);
110 extern void pm_wakeup_event(struct device *dev, unsigned int msec);
111 
112 #else /* !CONFIG_PM_SLEEP */
113 
114 static inline void device_set_wakeup_capable(struct device *dev, bool capable)
115 {
116         dev->power.can_wakeup = capable;
117 }
118 
119 static inline bool device_can_wakeup(struct device *dev)
120 {
121         return dev->power.can_wakeup;
122 }
123 
124 static inline void wakeup_source_prepare(struct wakeup_source *ws,
125                                          const char *name) {}
126 
127 static inline struct wakeup_source *wakeup_source_create(const char *name)
128 {
129         return NULL;
130 }
131 
132 static inline void wakeup_source_drop(struct wakeup_source *ws) {}
133 
134 static inline void wakeup_source_destroy(struct wakeup_source *ws) {}
135 
136 static inline void wakeup_source_add(struct wakeup_source *ws) {}
137 
138 static inline void wakeup_source_remove(struct wakeup_source *ws) {}
139 
140 static inline struct wakeup_source *wakeup_source_register(const char *name)
141 {
142         return NULL;
143 }
144 
145 static inline void wakeup_source_unregister(struct wakeup_source *ws) {}
146 
147 static inline int device_wakeup_enable(struct device *dev)
148 {
149         dev->power.should_wakeup = true;
150         return 0;
151 }
152 
153 static inline int device_wakeup_disable(struct device *dev)
154 {
155         dev->power.should_wakeup = false;
156         return 0;
157 }
158 
159 static inline int device_set_wakeup_enable(struct device *dev, bool enable)
160 {
161         dev->power.should_wakeup = enable;
162         return 0;
163 }
164 
165 static inline int device_init_wakeup(struct device *dev, bool val)
166 {
167         device_set_wakeup_capable(dev, val);
168         device_set_wakeup_enable(dev, val);
169         return 0;
170 }
171 
172 static inline bool device_may_wakeup(struct device *dev)
173 {
174         return dev->power.can_wakeup && dev->power.should_wakeup;
175 }
176 
177 static inline void __pm_stay_awake(struct wakeup_source *ws) {}
178 
179 static inline void pm_stay_awake(struct device *dev) {}
180 
181 static inline void __pm_relax(struct wakeup_source *ws) {}
182 
183 static inline void pm_relax(struct device *dev) {}
184 
185 static inline void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec) {}
186 
187 static inline void pm_wakeup_event(struct device *dev, unsigned int msec) {}
188 
189 #endif /* !CONFIG_PM_SLEEP */
190 
191 static inline void wakeup_source_init(struct wakeup_source *ws,
192                                       const char *name)
193 {
194         wakeup_source_prepare(ws, name);
195         wakeup_source_add(ws);
196 }
197 
198 static inline void wakeup_source_trash(struct wakeup_source *ws)
199 {
200         wakeup_source_remove(ws);
201         wakeup_source_drop(ws);
202 }
203 
204 #endif /* _LINUX_PM_WAKEUP_H */
205 

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