You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
272 lines
7.2 KiB
272 lines
7.2 KiB
/*
|
|
* pm.h - Power management interface
|
|
*
|
|
* Copyright (C) 2000 Andrew Henroid
|
|
*
|
|
* 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_H
|
|
#define _LINUX_PM_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/list.h>
|
|
#include <asm/atomic.h>
|
|
|
|
/*
|
|
* Power management requests... these are passed to pm_send_all() and friends.
|
|
*
|
|
* these functions are old and deprecated, see below.
|
|
*/
|
|
typedef int __bitwise pm_request_t;
|
|
|
|
#define PM_SUSPEND ((__force pm_request_t) 1) /* enter D1-D3 */
|
|
#define PM_RESUME ((__force pm_request_t) 2) /* enter D0 */
|
|
|
|
|
|
/*
|
|
* Device types... these are passed to pm_register
|
|
*/
|
|
typedef int __bitwise pm_dev_t;
|
|
|
|
#define PM_UNKNOWN_DEV ((__force pm_dev_t) 0) /* generic */
|
|
#define PM_SYS_DEV ((__force pm_dev_t) 1) /* system device (fan, KB controller, ...) */
|
|
#define PM_PCI_DEV ((__force pm_dev_t) 2) /* PCI device */
|
|
#define PM_USB_DEV ((__force pm_dev_t) 3) /* USB device */
|
|
#define PM_SCSI_DEV ((__force pm_dev_t) 4) /* SCSI device */
|
|
#define PM_ISA_DEV ((__force pm_dev_t) 5) /* ISA device */
|
|
#define PM_MTD_DEV ((__force pm_dev_t) 6) /* Memory Technology Device */
|
|
|
|
/*
|
|
* System device hardware ID (PnP) values
|
|
*/
|
|
enum
|
|
{
|
|
PM_SYS_UNKNOWN = 0x00000000, /* generic */
|
|
PM_SYS_KBC = 0x41d00303, /* keyboard controller */
|
|
PM_SYS_COM = 0x41d00500, /* serial port */
|
|
PM_SYS_IRDA = 0x41d00510, /* IRDA controller */
|
|
PM_SYS_FDC = 0x41d00700, /* floppy controller */
|
|
PM_SYS_VGA = 0x41d00900, /* VGA controller */
|
|
PM_SYS_PCMCIA = 0x41d00e00, /* PCMCIA controller */
|
|
};
|
|
|
|
/*
|
|
* Device identifier
|
|
*/
|
|
#define PM_PCI_ID(dev) ((dev)->bus->number << 16 | (dev)->devfn)
|
|
|
|
/*
|
|
* Request handler callback
|
|
*/
|
|
struct pm_dev;
|
|
|
|
typedef int (*pm_callback)(struct pm_dev *dev, pm_request_t rqst, void *data);
|
|
|
|
/*
|
|
* Dynamic device information
|
|
*/
|
|
struct pm_dev
|
|
{
|
|
pm_dev_t type;
|
|
unsigned long id;
|
|
pm_callback callback;
|
|
void *data;
|
|
|
|
unsigned long flags;
|
|
unsigned long state;
|
|
unsigned long prev_state;
|
|
|
|
struct list_head entry;
|
|
};
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
extern int pm_active;
|
|
|
|
#define PM_IS_ACTIVE() (pm_active != 0)
|
|
|
|
/*
|
|
* Register a device with power management
|
|
*/
|
|
struct pm_dev __deprecated *
|
|
pm_register(pm_dev_t type, unsigned long id, pm_callback callback);
|
|
|
|
/*
|
|
* Unregister a device with power management
|
|
*/
|
|
void __deprecated pm_unregister(struct pm_dev *dev);
|
|
|
|
/*
|
|
* Unregister all devices with matching callback
|
|
*/
|
|
void __deprecated pm_unregister_all(pm_callback callback);
|
|
|
|
/*
|
|
* Send a request to all devices
|
|
*/
|
|
int __deprecated pm_send_all(pm_request_t rqst, void *data);
|
|
|
|
#else /* CONFIG_PM */
|
|
|
|
#define PM_IS_ACTIVE() 0
|
|
|
|
static inline struct pm_dev *pm_register(pm_dev_t type,
|
|
unsigned long id,
|
|
pm_callback callback)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void pm_unregister(struct pm_dev *dev) {}
|
|
|
|
static inline void pm_unregister_all(pm_callback callback) {}
|
|
|
|
static inline int pm_send_all(pm_request_t rqst, void *data)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
/* Functions above this comment are list-based old-style power
|
|
* managment. Please avoid using them. */
|
|
|
|
/*
|
|
* Callbacks for platform drivers to implement.
|
|
*/
|
|
extern void (*pm_idle)(void);
|
|
extern void (*pm_power_off)(void);
|
|
|
|
typedef int __bitwise suspend_state_t;
|
|
|
|
#define PM_SUSPEND_ON ((__force suspend_state_t) 0)
|
|
#define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1)
|
|
#define PM_SUSPEND_MEM ((__force suspend_state_t) 3)
|
|
#define PM_SUSPEND_DISK ((__force suspend_state_t) 4)
|
|
#define PM_SUSPEND_MAX ((__force suspend_state_t) 5)
|
|
|
|
typedef int __bitwise suspend_disk_method_t;
|
|
|
|
#define PM_DISK_FIRMWARE ((__force suspend_disk_method_t) 1)
|
|
#define PM_DISK_PLATFORM ((__force suspend_disk_method_t) 2)
|
|
#define PM_DISK_SHUTDOWN ((__force suspend_disk_method_t) 3)
|
|
#define PM_DISK_REBOOT ((__force suspend_disk_method_t) 4)
|
|
#define PM_DISK_MAX ((__force suspend_disk_method_t) 5)
|
|
|
|
struct pm_ops {
|
|
suspend_disk_method_t pm_disk_mode;
|
|
int (*prepare)(suspend_state_t state);
|
|
int (*enter)(suspend_state_t state);
|
|
int (*finish)(suspend_state_t state);
|
|
};
|
|
|
|
extern void pm_set_ops(struct pm_ops *);
|
|
extern struct pm_ops *pm_ops;
|
|
extern int pm_suspend(suspend_state_t state);
|
|
|
|
|
|
/*
|
|
* Device power management
|
|
*/
|
|
|
|
struct device;
|
|
|
|
typedef struct pm_message {
|
|
int event;
|
|
} pm_message_t;
|
|
|
|
/*
|
|
* There are 4 important states driver can be in:
|
|
* ON -- driver is working
|
|
* FREEZE -- stop operations and apply whatever policy is applicable to a
|
|
* suspended driver of that class, freeze queues for block like IDE
|
|
* does, drop packets for ethernet, etc... stop DMA engine too etc...
|
|
* so a consistent image can be saved; but do not power any hardware
|
|
* down.
|
|
* SUSPEND - like FREEZE, but hardware is doing as much powersaving as
|
|
* possible. Roughly pci D3.
|
|
*
|
|
* Unfortunately, current drivers only recognize numeric values 0 (ON) and 3
|
|
* (SUSPEND). We'll need to fix the drivers. So yes, putting 3 to all different
|
|
* defines is intentional, and will go away as soon as drivers are fixed. Also
|
|
* note that typedef is neccessary, we'll probably want to switch to
|
|
* typedef struct pm_message_t { int event; int flags; } pm_message_t
|
|
* or something similar soon.
|
|
*/
|
|
|
|
#define PM_EVENT_ON 0
|
|
#define PM_EVENT_FREEZE 1
|
|
#define PM_EVENT_SUSPEND 2
|
|
|
|
#define PMSG_FREEZE ((struct pm_message){ .event = PM_EVENT_FREEZE, })
|
|
#define PMSG_SUSPEND ((struct pm_message){ .event = PM_EVENT_SUSPEND, })
|
|
#define PMSG_ON ((struct pm_message){ .event = PM_EVENT_ON, })
|
|
|
|
struct dev_pm_info {
|
|
pm_message_t power_state;
|
|
unsigned can_wakeup:1;
|
|
#ifdef CONFIG_PM
|
|
unsigned should_wakeup:1;
|
|
pm_message_t prev_state;
|
|
void * saved_state;
|
|
atomic_t pm_users;
|
|
struct device * pm_parent;
|
|
struct list_head entry;
|
|
#endif
|
|
};
|
|
|
|
extern void device_pm_set_parent(struct device * dev, struct device * parent);
|
|
|
|
extern int device_power_down(pm_message_t state);
|
|
extern void device_power_up(void);
|
|
extern void device_resume(void);
|
|
|
|
#ifdef CONFIG_PM
|
|
extern int device_suspend(pm_message_t state);
|
|
|
|
#define device_set_wakeup_enable(dev,val) \
|
|
((dev)->power.should_wakeup = !!(val))
|
|
#define device_may_wakeup(dev) \
|
|
(device_can_wakeup(dev) && (dev)->power.should_wakeup)
|
|
|
|
#else /* !CONFIG_PM */
|
|
|
|
static inline int device_suspend(pm_message_t state)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#define device_set_wakeup_enable(dev,val) do{}while(0)
|
|
#define device_may_wakeup(dev) (0)
|
|
|
|
#endif
|
|
|
|
/* changes to device_may_wakeup take effect on the next pm state change.
|
|
* by default, devices should wakeup if they can.
|
|
*/
|
|
#define device_can_wakeup(dev) \
|
|
((dev)->power.can_wakeup)
|
|
#define device_init_wakeup(dev,val) \
|
|
do { \
|
|
device_can_wakeup(dev) = !!(val); \
|
|
device_set_wakeup_enable(dev,val); \
|
|
} while(0)
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_PM_H */
|
|
|