diff options
Diffstat (limited to 'include/linux/pm.h')
| -rw-r--r-- | include/linux/pm.h | 103 |
1 files changed, 50 insertions, 53 deletions
diff --git a/include/linux/pm.h b/include/linux/pm.h index 68da2eae8547..1d106a3edad5 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -28,44 +28,28 @@ #include <asm/atomic.h> /* - * Power management requests + * Power management requests... these are passed to pm_send_all() and friends. + * + * these functions are old and deprecated, see below. */ -enum -{ - PM_SUSPEND, /* enter D1-D3 */ - PM_RESUME, /* enter D0 */ +typedef int __bitwise pm_request_t; - PM_SAVE_STATE, /* save device's state */ +#define PM_SUSPEND ((__force pm_request_t) 1) /* enter D1-D3 */ +#define PM_RESUME ((__force pm_request_t) 2) /* enter D0 */ - /* enable wake-on */ - PM_SET_WAKEUP, - - /* bus resource management */ - PM_GET_RESOURCES, - PM_SET_RESOURCES, - - /* base station management */ - PM_EJECT, - PM_LOCK, -}; - -typedef int pm_request_t; /* - * Device types + * Device types... these are passed to pm_register */ -enum -{ - PM_UNKNOWN_DEV = 0, /* generic */ - PM_SYS_DEV, /* system device (fan, KB controller, ...) */ - PM_PCI_DEV, /* PCI device */ - PM_USB_DEV, /* USB device */ - PM_SCSI_DEV, /* SCSI device */ - PM_ISA_DEV, /* ISA device */ - PM_MTD_DEV, /* Memory Technology Device */ -}; +typedef int __bitwise pm_dev_t; -typedef int 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 @@ -119,32 +103,27 @@ extern int pm_active; /* * Register a device with power management */ -struct pm_dev *pm_register(pm_dev_t type, - unsigned long id, - pm_callback callback); +struct pm_dev __deprecated *pm_register(pm_dev_t type, unsigned long id, pm_callback callback); /* * Unregister a device with power management */ -void pm_unregister(struct pm_dev *dev); +void __deprecated pm_unregister(struct pm_dev *dev); /* * Unregister all devices with matching callback */ -void pm_unregister_all(pm_callback callback); +void __deprecated pm_unregister_all(pm_callback callback); /* * Send a request to a single device */ -int pm_send(struct pm_dev *dev, pm_request_t rqst, void *data); +int __deprecated pm_send(struct pm_dev *dev, pm_request_t rqst, void *data); /* * Send a request to all devices */ -int pm_send_all(pm_request_t rqst, void *data); - -static inline void pm_access(struct pm_dev *dev) {} -static inline void pm_dev_idle(struct pm_dev *dev) {} +int __deprecated pm_send_all(pm_request_t rqst, void *data); #else /* CONFIG_PM */ @@ -171,16 +150,10 @@ static inline int pm_send_all(pm_request_t rqst, void *data) return 0; } -static inline struct pm_dev *pm_find(pm_dev_t type, struct pm_dev *from) -{ - return 0; -} - -static inline void pm_access(struct pm_dev *dev) {} -static inline void pm_dev_idle(struct pm_dev *dev) {} - #endif /* CONFIG_PM */ +/* Functions above this comment are list-based old-style power + * managment. Please avoid using them. */ /* * Callbacks for platform drivers to implement. @@ -222,10 +195,34 @@ extern int pm_suspend(suspend_state_t state); struct device; +typedef u32 __bitwise 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 diferent 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 PMSG_FREEZE ((__force pm_message_t) 3) +#define PMSG_SUSPEND ((__force pm_message_t) 3) +#define PMSG_ON ((__force pm_message_t) 0) + struct dev_pm_info { - u32 power_state; + pm_message_t power_state; #ifdef CONFIG_PM - u32 prev_state; + pm_message_t prev_state; void * saved_state; atomic_t pm_users; struct device * pm_parent; @@ -235,8 +232,8 @@ struct dev_pm_info { extern void device_pm_set_parent(struct device * dev, struct device * parent); -extern int device_suspend(u32 state); -extern int device_power_down(u32 state); +extern int device_suspend(pm_message_t state); +extern int device_power_down(pm_message_t state); extern void device_power_up(void); extern void device_resume(void); |