include/linux/pm_wakeup.h

   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 static inline void device_set_wakeup_path(struct device *dev)
  92 {
  93         dev->power.wakeup_path = true;
  94 }
  95
  96 /* drivers/base/power/wakeup.c */
  97 extern void wakeup_source_prepare(struct wakeup_source *ws, const char *name);
  98 extern struct wakeup_source *wakeup_source_create(const char *name);
  99 extern void wakeup_source_drop(struct wakeup_source *ws);
 100 extern void wakeup_source_destroy(struct wakeup_source *ws);
 101 extern void wakeup_source_add(struct wakeup_source *ws);
 102 extern void wakeup_source_remove(struct wakeup_source *ws);
 103 extern struct wakeup_source *wakeup_source_register(const char *name);
 104 extern void wakeup_source_unregister(struct wakeup_source *ws);
 105 extern int device_wakeup_enable(struct device *dev);
 106 extern int device_wakeup_disable(struct device *dev);
 107 extern void device_set_wakeup_capable(struct device *dev, bool capable);
 108 extern int device_init_wakeup(struct device *dev, bool val);
 109 extern int device_set_wakeup_enable(struct device *dev, bool enable);
 110 extern void __pm_stay_awake(struct wakeup_source *ws);
 111 extern void pm_stay_awake(struct device *dev);
 112 extern void __pm_relax(struct wakeup_source *ws);
 113 extern void pm_relax(struct device *dev);
 114 extern void pm_wakeup_ws_event(struct wakeup_source *ws, unsigned int msec, bool hard);
 115 extern void pm_wakeup_dev_event(struct device *dev, unsigned int msec, bool hard);
 116
 117 #else /* !CONFIG_PM_SLEEP */
 118
 119 static inline void device_set_wakeup_capable(struct device *dev, bool capable)
 120 {
 121         dev->power.can_wakeup = capable;
 122 }
 123
 124 static inline bool device_can_wakeup(struct device *dev)
 125 {
 126         return dev->power.can_wakeup;
 127 }
 128
 129 static inline void wakeup_source_prepare(struct wakeup_source *ws,
 130                                          const char *name) {}
 131
 132 static inline struct wakeup_source *wakeup_source_create(const char *name)
 133 {
 134         return NULL;
 135 }
 136
 137 static inline void wakeup_source_drop(struct wakeup_source *ws) {}
 138
 139 static inline void wakeup_source_destroy(struct wakeup_source *ws) {}
 140
 141 static inline void wakeup_source_add(struct wakeup_source *ws) {}
 142
 143 static inline void wakeup_source_remove(struct wakeup_source *ws) {}
 144
 145 static inline struct wakeup_source *wakeup_source_register(const char *name)
 146 {
 147         return NULL;
 148 }
 149
 150 static inline void wakeup_source_unregister(struct wakeup_source *ws) {}
 151
 152 static inline int device_wakeup_enable(struct device *dev)
 153 {
 154         dev->power.should_wakeup = true;
 155         return 0;
 156 }
 157
 158 static inline int device_wakeup_disable(struct device *dev)
 159 {
 160         dev->power.should_wakeup = false;
 161         return 0;
 162 }
 163
 164 static inline int device_set_wakeup_enable(struct device *dev, bool enable)
 165 {
 166         dev->power.should_wakeup = enable;
 167         return 0;
 168 }
 169
 170 static inline int device_init_wakeup(struct device *dev, bool val)
 171 {
 172         device_set_wakeup_capable(dev, val);
 173         device_set_wakeup_enable(dev, val);
 174         return 0;
 175 }
 176
 177 static inline bool device_may_wakeup(struct device *dev)
 178 {
 179         return dev->power.can_wakeup && dev->power.should_wakeup;
 180 }
 181
 182 static inline void device_set_wakeup_path(struct device *dev) {}
 183
 184 static inline void __pm_stay_awake(struct wakeup_source *ws) {}
 185
 186 static inline void pm_stay_awake(struct device *dev) {}
 187
 188 static inline void __pm_relax(struct wakeup_source *ws) {}
 189
 190 static inline void pm_relax(struct device *dev) {}
 191
 192 static inline void pm_wakeup_ws_event(struct wakeup_source *ws,
 193                                       unsigned int msec, bool hard) {}
 194
 195 static inline void pm_wakeup_dev_event(struct device *dev, unsigned int msec,
 196                                        bool hard) {}
 197
 198 #endif /* !CONFIG_PM_SLEEP */
 199
 200 static inline void wakeup_source_init(struct wakeup_source *ws,
 201                                       const char *name)
 202 {
 203         wakeup_source_prepare(ws, name);
 204         wakeup_source_add(ws);
 205 }
 206
 207 static inline void wakeup_source_trash(struct wakeup_source *ws)
 208 {
 209         wakeup_source_remove(ws);
 210         wakeup_source_drop(ws);
 211 }
 212
 213 static inline void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec)
 214 {
 215         return pm_wakeup_ws_event(ws, msec, false);
 216 }
 217
 218 static inline void pm_wakeup_event(struct device *dev, unsigned int msec)
 219 {
 220         return pm_wakeup_dev_event(dev, msec, false);
 221 }
 222
 223 static inline void pm_wakeup_hard_event(struct device *dev)
 224 {
 225         return pm_wakeup_dev_event(dev, 0, true);
 226 }
 227
 228 #endif /* _LINUX_PM_WAKEUP_H */