236 lines
6.8 KiB
C
236 lines
6.8 KiB
C
|
/* 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 don't 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_create(const char *name);
|
||
|
|
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(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 int 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_create(const char *name)
|
||
|
|
{
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
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(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 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 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 void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec)
|
||
|
|
{
|
||
|
|
return pm_wakeup_ws_event(ws, msec, false);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pm_wakeup_event(struct device *dev, unsigned int msec)
|
||
|
|
{
|
||
|
|
return pm_wakeup_dev_event(dev, msec, false);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pm_wakeup_hard_event(struct device *dev)
|
||
|
|
{
|
||
|
|
return 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);
|
||
|
|
} else {
|
||
|
|
device_wakeup_disable(dev);
|
||
|
|
device_set_wakeup_capable(dev, false);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* _LINUX_PM_WAKEUP_H */
|