/*
   *  pm_wakeup.h - Power management wakeup interface
   *
   *  Copyright (C) 2008 Alan Stern

   *  Copyright (C) 2010 Rafael J. Wysocki, Novell Inc.

   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2 of the License, or
   *  (at your option) any later version.
   *
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *  along with this program; if not, write to the Free Software
   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  #ifndef _LINUX_PM_WAKEUP_H
  #define _LINUX_PM_WAKEUP_H
  
  #ifndef _DEVICE_H_
  # error "please don't include this file directly"
  #endif

  #include <linux/types.h>

  /**
   * struct wakeup_source - Representation of wakeup sources

   *

   * @total_time: Total time this wakeup source has been active.
   * @max_time: Maximum time this wakeup source has been continuously active.

   * @last_time: Monotonic clock when the wakeup source's was touched last time.

   * @prevent_sleep_time: Total time this source has been preventing autosleep.

   * @event_count: Number of signaled wakeup events.

   * @active_count: Number of times the wakeup source was activated.
   * @relax_count: Number of times the wakeup source was deactivated.

   * @expire_count: Number of times the wakeup source's timeout has expired.
   * @wakeup_count: Number of times the wakeup source might abort suspend.

   * @active: Status of the wakeup source.

   * @has_timeout: The wakeup source has been activated with a timeout.

   */

  struct wakeup_source {

  	const char 		*name;

  	struct list_head	entry;
  	spinlock_t		lock;
  	struct timer_list	timer;
  	unsigned long		timer_expires;
  	ktime_t total_time;
  	ktime_t max_time;
  	ktime_t last_time;

  	ktime_t start_prevent_time;
  	ktime_t prevent_sleep_time;

  	unsigned long		event_count;
  	unsigned long		active_count;
  	unsigned long		relax_count;

  	unsigned long		expire_count;
  	unsigned long		wakeup_count;
  	bool			active:1;

  	bool			autosleep_enabled:1;

  };
  
  #ifdef CONFIG_PM_SLEEP
  
  /*
   * Changes to device_may_wakeup take effect on the next pm state change.
   */

  static inline bool device_can_wakeup(struct device *dev)
  {
  	return dev->power.can_wakeup;
  }

  static inline bool device_may_wakeup(struct device *dev)

  {

  	return dev->power.can_wakeup && !!dev->power.wakeup;

  }

  /* drivers/base/power/wakeup.c */

  extern void wakeup_source_prepare(struct wakeup_source *ws, const char *name);

  extern struct wakeup_source *wakeup_source_create(const char *name);

  extern void wakeup_source_drop(struct wakeup_source *ws);

  extern void wakeup_source_destroy(struct wakeup_source *ws);
  extern void wakeup_source_add(struct wakeup_source *ws);
  extern void wakeup_source_remove(struct wakeup_source *ws);
  extern struct wakeup_source *wakeup_source_register(const char *name);
  extern void wakeup_source_unregister(struct wakeup_source *ws);
  extern int device_wakeup_enable(struct device *dev);
  extern int device_wakeup_disable(struct device *dev);

  extern void device_set_wakeup_capable(struct device *dev, bool capable);

  extern int device_init_wakeup(struct device *dev, bool val);
  extern int device_set_wakeup_enable(struct device *dev, bool enable);
  extern void __pm_stay_awake(struct wakeup_source *ws);
  extern void pm_stay_awake(struct device *dev);
  extern void __pm_relax(struct wakeup_source *ws);
  extern void pm_relax(struct device *dev);
  extern void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec);
  extern void pm_wakeup_event(struct device *dev, unsigned int msec);
  
  #else /* !CONFIG_PM_SLEEP */

  static inline void device_set_wakeup_capable(struct device *dev, bool capable)

  {

  	dev->power.can_wakeup = capable;

  }

  static inline bool device_can_wakeup(struct device *dev)

  {
  	return dev->power.can_wakeup;
  }

  static inline void wakeup_source_prepare(struct wakeup_source *ws,
  					 const char *name) {}

  static inline struct wakeup_source *wakeup_source_create(const char *name)

  {

  	return NULL;

  }

  static inline void wakeup_source_drop(struct wakeup_source *ws) {}

  static inline void wakeup_source_destroy(struct wakeup_source *ws) {}
  
  static inline void wakeup_source_add(struct wakeup_source *ws) {}

  static inline void wakeup_source_remove(struct wakeup_source *ws) {}
  
  static inline struct wakeup_source *wakeup_source_register(const char *name)

  {

  	return NULL;

  }

  static inline void wakeup_source_unregister(struct wakeup_source *ws) {}
  
  static inline int device_wakeup_enable(struct device *dev)

  {

  	dev->power.should_wakeup = true;
  	return 0;

  }

  static inline int device_wakeup_disable(struct device *dev)

  {

  	dev->power.should_wakeup = false;

  	return 0;

  }

  static inline int device_set_wakeup_enable(struct device *dev, bool enable)

  {

  	dev->power.should_wakeup = enable;
  	return 0;

  }

  static inline int device_init_wakeup(struct device *dev, bool val)
  {
  	device_set_wakeup_capable(dev, val);
  	device_set_wakeup_enable(dev, val);
  	return 0;
  }

  static inline bool device_may_wakeup(struct device *dev)

  {

  	return dev->power.can_wakeup && dev->power.should_wakeup;

  }

  static inline void __pm_stay_awake(struct wakeup_source *ws) {}
  
  static inline void pm_stay_awake(struct device *dev) {}
  
  static inline void __pm_relax(struct wakeup_source *ws) {}
  
  static inline void pm_relax(struct device *dev) {}
  
  static inline void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec) {}
  
  static inline void pm_wakeup_event(struct device *dev, unsigned int msec) {}
  
  #endif /* !CONFIG_PM_SLEEP */

  static inline void wakeup_source_init(struct wakeup_source *ws,
  				      const char *name)
  {
  	wakeup_source_prepare(ws, name);
  	wakeup_source_add(ws);
  }
  
  static inline void wakeup_source_trash(struct wakeup_source *ws)
  {
  	wakeup_source_remove(ws);
  	wakeup_source_drop(ws);
  }

  #endif /* _LINUX_PM_WAKEUP_H */