/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* pm_wakeup . h - Power management wakeup interface
*
* Copyright ( C ) 2008 Alan Stern
* Copyright ( C ) 2010 Rafael J . Wysocki , Novell Inc .
*/
#ifndef _LINUX_PM_WAKEUP_H
#define _LINUX_PM_WAKEUP_H
#ifndef _DEVICE_H_
# error "Please do not include this file directly."
#endif
#include <linux/types.h>
struct wake_irq;
/**
* struct wakeup_source - Representation of wakeup sources
*
* @ name : Name of the wakeup source
* @ id : Wakeup source id
* @ entry : Wakeup source list entry
* @ lock : Wakeup source lock
* @ wakeirq : Optional device specific wakeirq
* @ timer : Wakeup timer list
* @ timer_expires : Wakeup timer expiration
* @ 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 .
* @ dev : Struct device for sysfs statistics about the wakeup source .
* @ active : Status of the wakeup source .
* @ autosleep_enabled : Autosleep is active , so update @ prevent_sleep_time .
*/
struct wakeup_source {
const char *name;
int id;
struct list_head entry;
spinlock_t lock;
struct wake_irq *wakeirq;
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;
struct device *dev;
bool active:1 ;
bool autosleep_enabled:1 ;
};
#define for_each_wakeup_source(ws) \
for ((ws) = wakeup_sources_walk_start(); \
(ws); \
(ws) = wakeup_sources_walk_next((ws)))
#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;
}
static inline bool device_wakeup_path(struct device *dev)
{
return dev->power.wakeup_path;
}
static inline void device_set_wakeup_path(struct device *dev)
{
dev->power.wakeup_path = true ;
}
/* drivers/base/power/wakeup.c */
extern struct wakeup_source *wakeup_source_register(struct device *dev,
const char *name);
extern void wakeup_source_unregister(struct wakeup_source *ws);
extern int wakeup_sources_read_lock(void );
extern void wakeup_sources_read_unlock(int idx);
extern struct wakeup_source *wakeup_sources_walk_start(void );
extern struct wakeup_source *wakeup_sources_walk_next(struct wakeup_source *ws);
extern int device_wakeup_enable(struct device *dev);
extern void device_wakeup_disable(struct device *dev);
extern void device_set_wakeup_capable(struct device *dev, bool capable);
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_ws_event(struct wakeup_source *ws, unsigned int msec, bool hard);
extern void pm_wakeup_dev_event(struct device *dev, unsigned int msec, bool hard);
#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 struct wakeup_source *wakeup_source_register(struct device *dev,
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 void device_wakeup_disable(struct device *dev)
{
dev->power.should_wakeup = false ;
}
static inline int device_set_wakeup_enable(struct device *dev, bool enable)
{
dev->power.should_wakeup = enable;
return 0 ;
}
static inline bool device_may_wakeup(struct device *dev)
{
return dev->power.can_wakeup && dev->power.should_wakeup;
}
static inline bool device_wakeup_path(struct device *dev)
{
return false ;
}
static inline void device_set_wakeup_path(struct device *dev) {}
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_ws_event(struct wakeup_source *ws,
unsigned int msec, bool hard) {}
static inline void pm_wakeup_dev_event(struct device *dev, unsigned int msec,
bool hard) {}
#endif /* !CONFIG_PM_SLEEP */
static inline bool device_awake_path(struct device *dev)
{
return device_wakeup_path(dev);
}
static inline void device_set_awake_path(struct device *dev)
{
device_set_wakeup_path(dev);
}
static inline void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec)
{
pm_wakeup_ws_event(ws, msec, false );
}
static inline void pm_wakeup_event(struct device *dev, unsigned int msec)
{
pm_wakeup_dev_event(dev, msec, false );
}
static inline void pm_wakeup_hard_event(struct device *dev)
{
pm_wakeup_dev_event(dev, 0 , true );
}
/**
* device_init_wakeup - Device wakeup initialization .
* @ dev : Device to handle .
* @ enable : Whether or not to enable @ dev as a wakeup device .
*
* By default , most devices should leave wakeup disabled . The exceptions are
* devices that everyone expects to be wakeup sources : keyboards , power buttons ,
* possibly network interfaces , etc . Also , devices that don ' t generate their
* own wakeup requests but merely forward requests from one bus to another
* ( like PCI bridges ) should have wakeup enabled by default .
*/
static inline int device_init_wakeup(struct device *dev, bool enable)
{
if (enable) {
device_set_wakeup_capable(dev, true );
return device_wakeup_enable(dev);
}
device_wakeup_disable(dev);
device_set_wakeup_capable(dev, false );
return 0 ;
}
static void device_disable_wakeup(void *dev)
{
device_init_wakeup(dev, false );
}
/**
* devm_device_init_wakeup - Resource managed device wakeup initialization .
* @ dev : Device to handle .
*
* This function is the devm managed version of device_init_wakeup ( dev , true ) .
*/
static inline int devm_device_init_wakeup(struct device *dev)
{
device_init_wakeup(dev, true );
return devm_add_action_or_reset(dev, device_disable_wakeup, dev);
}
#endif /* _LINUX_PM_WAKEUP_H */
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