237 lines
6.6 KiB
C
237 lines
6.6 KiB
C
/*
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* pm.h - Power management interface
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*
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* Copyright (C) 2000 Andrew Henroid
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LINUX_PM_H
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#define _LINUX_PM_H
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#ifdef __KERNEL__
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#include <linux/config.h>
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#include <linux/list.h>
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#include <asm/atomic.h>
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/*
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* Power management requests... these are passed to pm_send_all() and friends.
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*
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* these functions are old and deprecated, see below.
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*/
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typedef int __bitwise pm_request_t;
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#define PM_SUSPEND ((__force pm_request_t) 1) /* enter D1-D3 */
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#define PM_RESUME ((__force pm_request_t) 2) /* enter D0 */
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/*
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* Device types... these are passed to pm_register
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*/
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typedef int __bitwise pm_dev_t;
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#define PM_UNKNOWN_DEV ((__force pm_dev_t) 0) /* generic */
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#define PM_SYS_DEV ((__force pm_dev_t) 1) /* system device (fan, KB controller, ...) */
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#define PM_PCI_DEV ((__force pm_dev_t) 2) /* PCI device */
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#define PM_USB_DEV ((__force pm_dev_t) 3) /* USB device */
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#define PM_SCSI_DEV ((__force pm_dev_t) 4) /* SCSI device */
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#define PM_ISA_DEV ((__force pm_dev_t) 5) /* ISA device */
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#define PM_MTD_DEV ((__force pm_dev_t) 6) /* Memory Technology Device */
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/*
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* System device hardware ID (PnP) values
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*/
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enum
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{
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PM_SYS_UNKNOWN = 0x00000000, /* generic */
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PM_SYS_KBC = 0x41d00303, /* keyboard controller */
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PM_SYS_COM = 0x41d00500, /* serial port */
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PM_SYS_IRDA = 0x41d00510, /* IRDA controller */
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PM_SYS_FDC = 0x41d00700, /* floppy controller */
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PM_SYS_VGA = 0x41d00900, /* VGA controller */
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PM_SYS_PCMCIA = 0x41d00e00, /* PCMCIA controller */
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};
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/*
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* Device identifier
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*/
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#define PM_PCI_ID(dev) ((dev)->bus->number << 16 | (dev)->devfn)
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/*
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* Request handler callback
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*/
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struct pm_dev;
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typedef int (*pm_callback)(struct pm_dev *dev, pm_request_t rqst, void *data);
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/*
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* Dynamic device information
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*/
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struct pm_dev
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{
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pm_dev_t type;
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unsigned long id;
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pm_callback callback;
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void *data;
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unsigned long flags;
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unsigned long state;
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unsigned long prev_state;
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struct list_head entry;
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};
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/* Functions above this comment are list-based old-style power
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* managment. Please avoid using them. */
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/*
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* Callbacks for platform drivers to implement.
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*/
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extern void (*pm_idle)(void);
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extern void (*pm_power_off)(void);
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typedef int __bitwise suspend_state_t;
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#define PM_SUSPEND_ON ((__force suspend_state_t) 0)
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#define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1)
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#define PM_SUSPEND_MEM ((__force suspend_state_t) 3)
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#define PM_SUSPEND_DISK ((__force suspend_state_t) 4)
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#define PM_SUSPEND_MAX ((__force suspend_state_t) 5)
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typedef int __bitwise suspend_disk_method_t;
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#define PM_DISK_FIRMWARE ((__force suspend_disk_method_t) 1)
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#define PM_DISK_PLATFORM ((__force suspend_disk_method_t) 2)
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#define PM_DISK_SHUTDOWN ((__force suspend_disk_method_t) 3)
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#define PM_DISK_REBOOT ((__force suspend_disk_method_t) 4)
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#define PM_DISK_MAX ((__force suspend_disk_method_t) 5)
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struct pm_ops {
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suspend_disk_method_t pm_disk_mode;
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int (*valid)(suspend_state_t state);
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int (*prepare)(suspend_state_t state);
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int (*enter)(suspend_state_t state);
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int (*finish)(suspend_state_t state);
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};
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extern void pm_set_ops(struct pm_ops *);
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extern struct pm_ops *pm_ops;
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extern int pm_suspend(suspend_state_t state);
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/*
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* Device power management
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*/
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struct device;
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typedef struct pm_message {
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int event;
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} pm_message_t;
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/*
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* There are 4 important states driver can be in:
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* ON -- driver is working
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* FREEZE -- stop operations and apply whatever policy is applicable to a
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* suspended driver of that class, freeze queues for block like IDE
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* does, drop packets for ethernet, etc... stop DMA engine too etc...
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* so a consistent image can be saved; but do not power any hardware
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* down.
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* SUSPEND - like FREEZE, but hardware is doing as much powersaving as
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* possible. Roughly pci D3.
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*
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* Unfortunately, current drivers only recognize numeric values 0 (ON) and 3
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* (SUSPEND). We'll need to fix the drivers. So yes, putting 3 to all different
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* defines is intentional, and will go away as soon as drivers are fixed. Also
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* note that typedef is neccessary, we'll probably want to switch to
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* typedef struct pm_message_t { int event; int flags; } pm_message_t
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* or something similar soon.
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*/
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#define PM_EVENT_ON 0
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#define PM_EVENT_FREEZE 1
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#define PM_EVENT_SUSPEND 2
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#define PMSG_FREEZE ((struct pm_message){ .event = PM_EVENT_FREEZE, })
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#define PMSG_SUSPEND ((struct pm_message){ .event = PM_EVENT_SUSPEND, })
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#define PMSG_ON ((struct pm_message){ .event = PM_EVENT_ON, })
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struct dev_pm_info {
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pm_message_t power_state;
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unsigned can_wakeup:1;
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#ifdef CONFIG_PM
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unsigned should_wakeup:1;
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pm_message_t prev_state;
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void * saved_state;
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struct device * pm_parent;
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struct list_head entry;
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#endif
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};
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extern void device_pm_set_parent(struct device * dev, struct device * parent);
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extern int device_power_down(pm_message_t state);
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extern void device_power_up(void);
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extern void device_resume(void);
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#ifdef CONFIG_PM
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extern int device_suspend(pm_message_t state);
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#define device_set_wakeup_enable(dev,val) \
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((dev)->power.should_wakeup = !!(val))
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#define device_may_wakeup(dev) \
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(device_can_wakeup(dev) && (dev)->power.should_wakeup)
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extern int dpm_runtime_suspend(struct device *, pm_message_t);
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extern void dpm_runtime_resume(struct device *);
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#else /* !CONFIG_PM */
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static inline int device_suspend(pm_message_t state)
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{
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return 0;
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}
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#define device_set_wakeup_enable(dev,val) do{}while(0)
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#define device_may_wakeup(dev) (0)
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static inline int dpm_runtime_suspend(struct device * dev, pm_message_t state)
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{
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return 0;
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}
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static inline void dpm_runtime_resume(struct device * dev)
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{
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}
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#endif
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/* changes to device_may_wakeup take effect on the next pm state change.
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* by default, devices should wakeup if they can.
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*/
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#define device_can_wakeup(dev) \
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((dev)->power.can_wakeup)
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#define device_init_wakeup(dev,val) \
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do { \
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device_can_wakeup(dev) = !!(val); \
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device_set_wakeup_enable(dev,val); \
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} while(0)
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#endif /* __KERNEL__ */
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#endif /* _LINUX_PM_H */
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