#ifdef __KERNEL__
-#include <linux/config.h>
#include <linux/list.h>
#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 */
-
- PM_SAVE_STATE, /* save device's state */
-
- /* enable wake-on */
- PM_SET_WAKEUP,
-
- /* bus resource management */
- PM_GET_RESOURCES,
- PM_SET_RESOURCES,
+typedef int __bitwise pm_request_t;
- /* base station management */
- PM_EJECT,
- PM_LOCK,
-};
+#define PM_SUSPEND ((__force pm_request_t) 1) /* enter D1-D3 */
+#define PM_RESUME ((__force pm_request_t) 2) /* enter D0 */
-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
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 *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);
-
-/*
- * Unregister all devices with matching callback
- */
-void 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);
-
-/*
- * Send a request to all devices
- */
-int pm_send_all(pm_request_t rqst, void *data);
-
-/*
- * Find a device
- */
-struct pm_dev *pm_find(pm_dev_t type, struct pm_dev *from);
-
-static inline void pm_access(struct pm_dev *dev) {}
-static inline void pm_dev_idle(struct pm_dev *dev) {}
-
-#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(struct pm_dev *dev, pm_request_t rqst, void *data)
-{
- return 0;
-}
-
-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.
extern void (*pm_idle)(void);
extern void (*pm_power_off)(void);
-enum {
- PM_SUSPEND_ON = 0,
- PM_SUSPEND_STANDBY = 1,
- /* NOTE: PM_SUSPEND_MEM == PCI_D3hot */
- PM_SUSPEND_MEM = 3,
- PM_SUSPEND_DISK = 4,
- PM_SUSPEND_MAX = 5,
-};
+typedef int __bitwise suspend_state_t;
-enum {
- PM_DISK_FIRMWARE = 1,
- PM_DISK_PLATFORM,
- PM_DISK_SHUTDOWN,
- PM_DISK_REBOOT,
- PM_DISK_MAX,
-};
+#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_TEST ((__force suspend_disk_method_t) 5)
+#define PM_DISK_TESTPROC ((__force suspend_disk_method_t) 6)
+#define PM_DISK_MAX ((__force suspend_disk_method_t) 7)
struct pm_ops {
- u32 pm_disk_mode;
- int (*prepare)(u32 state);
- int (*enter)(u32 state);
- int (*finish)(u32 state);
+ suspend_disk_method_t pm_disk_mode;
+ int (*valid)(suspend_state_t state);
+ 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 int pm_suspend(u32 state);
+extern struct pm_ops *pm_ops;
+extern int pm_suspend(suspend_state_t state);
/*
struct device;
+typedef struct pm_message {
+ int event;
+} pm_message_t;
+
+/*
+ * Several driver power state transitions are externally visible, affecting
+ * the state of pending I/O queues and (for drivers that touch hardware)
+ * interrupts, wakeups, DMA, and other hardware state. There may also be
+ * internal transitions to various low power modes, which are transparent
+ * to the rest of the driver stack (such as a driver that's ON gating off
+ * clocks which are not in active use).
+ *
+ * One transition is triggered by resume(), after a suspend() call; the
+ * message is implicit:
+ *
+ * ON Driver starts working again, responding to hardware events
+ * and software requests. The hardware may have gone through
+ * a power-off reset, or it may have maintained state from the
+ * previous suspend() which the driver will rely on while
+ * resuming. On most platforms, there are no restrictions on
+ * availability of resources like clocks during resume().
+ *
+ * Other transitions are triggered by messages sent using suspend(). All
+ * these transitions quiesce the driver, so that I/O queues are inactive.
+ * That commonly entails turning off IRQs and DMA; there may be rules
+ * about how to quiesce that are specific to the bus or the device's type.
+ * (For example, network drivers mark the link state.) Other details may
+ * differ according to the message:
+ *
+ * SUSPEND Quiesce, enter a low power device state appropriate for
+ * the upcoming system state (such as PCI_D3hot), and enable
+ * wakeup events as appropriate.
+ *
+ * FREEZE Quiesce operations so that a consistent image can be saved;
+ * but do NOT otherwise enter a low power device state, and do
+ * NOT emit system wakeup events.
+ *
+ * PRETHAW Quiesce as if for FREEZE; additionally, prepare for restoring
+ * the system from a snapshot taken after an earlier FREEZE.
+ * Some drivers will need to reset their hardware state instead
+ * of preserving it, to ensure that it's never mistaken for the
+ * state which that earlier snapshot had set up.
+ *
+ * A minimally power-aware driver treats all messages as SUSPEND, fully
+ * reinitializes its device during resume() -- whether or not it was reset
+ * during the suspend/resume cycle -- and can't issue wakeup events.
+ *
+ * More power-aware drivers may also use low power states at runtime as
+ * well as during system sleep states like PM_SUSPEND_STANDBY. They may
+ * be able to use wakeup events to exit from runtime low-power states,
+ * or from system low-power states such as standby or suspend-to-RAM.
+ */
+
+#define PM_EVENT_ON 0
+#define PM_EVENT_FREEZE 1
+#define PM_EVENT_SUSPEND 2
+#define PM_EVENT_PRETHAW 3
+
+#define PMSG_FREEZE ((struct pm_message){ .event = PM_EVENT_FREEZE, })
+#define PMSG_PRETHAW ((struct pm_message){ .event = PM_EVENT_PRETHAW, })
+#define PMSG_SUSPEND ((struct pm_message){ .event = PM_EVENT_SUSPEND, })
+#define PMSG_ON ((struct pm_message){ .event = PM_EVENT_ON, })
+
struct dev_pm_info {
- u32 power_state;
+ pm_message_t power_state;
+ unsigned can_wakeup:1;
#ifdef CONFIG_PM
- u32 prev_state;
- u8 * saved_state;
- atomic_t pm_users;
+ unsigned should_wakeup:1;
+ pm_message_t prev_state;
+ void * saved_state;
struct device * pm_parent;
struct list_head entry;
#endif
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_power_down(pm_message_t state);
extern void device_power_up(void);
extern void device_resume(void);
+#ifdef CONFIG_PM
+extern suspend_disk_method_t pm_disk_mode;
+
+extern int device_suspend(pm_message_t state);
+extern int device_prepare_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)
+
+extern int dpm_runtime_suspend(struct device *, pm_message_t);
+extern void dpm_runtime_resume(struct device *);
+extern void __suspend_report_result(const char *function, void *fn, int ret);
+
+#define suspend_report_result(fn, ret) \
+ do { \
+ __suspend_report_result(__FUNCTION__, fn, ret); \
+ } while (0)
+
+#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)
+
+static inline int dpm_runtime_suspend(struct device * dev, pm_message_t state)
+{
+ return 0;
+}
+
+static inline void dpm_runtime_resume(struct device * dev)
+{
+}
+
+#define suspend_report_result(fn, ret) do { } while (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__ */
git://git.onelab.eu / linux-2.6.git / blobdiff