pm.h
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上传日期:2009-04-28
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- /*
- * 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;
- #ifdef CONFIG_PM
- 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);
- #else
- static inline int device_suspend(pm_message_t state)
- {
- return 0;
- }
- #endif
- #endif /* __KERNEL__ */
- #endif /* _LINUX_PM_H */