#include <linux/list.h>
#include <asm/atomic.h>
+#include <asm/errno.h>
/*
* Power management requests... these are passed to pm_send_all() and friends.
*/
extern void (*pm_idle)(void);
extern void (*pm_power_off)(void);
+extern void (*pm_power_off_prepare)(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_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)
+#define PM_SUSPEND_MAX ((__force suspend_state_t) 4)
+/**
+ * struct pm_ops - Callbacks for managing platform dependent system sleep
+ * states.
+ *
+ * @valid: Callback to determine if given system sleep state is supported by
+ * the platform.
+ * Valid (ie. supported) states are advertised in /sys/power/state. Note
+ * that it still may be impossible to enter given system sleep state if the
+ * conditions aren't right.
+ * There is the %pm_valid_only_mem function available that can be assigned
+ * to this if the platform only supports mem sleep.
+ *
+ * @set_target: Tell the platform which system sleep state is going to be
+ * entered.
+ * @set_target() is executed right prior to suspending devices. The
+ * information conveyed to the platform code by @set_target() should be
+ * disregarded by the platform as soon as @finish() is executed and if
+ * @prepare() fails. If @set_target() fails (ie. returns nonzero),
+ * @prepare(), @enter() and @finish() will not be called by the PM core.
+ * This callback is optional. However, if it is implemented, the argument
+ * passed to @prepare(), @enter() and @finish() is meaningless and should
+ * be ignored.
+ *
+ * @prepare: Prepare the platform for entering the system sleep state indicated
+ * by @set_target() or represented by the argument if @set_target() is not
+ * implemented.
+ * @prepare() is called right after devices have been suspended (ie. the
+ * appropriate .suspend() method has been executed for each device) and
+ * before the nonboot CPUs are disabled (it is executed with IRQs enabled).
+ * This callback is optional. It returns 0 on success or a negative
+ * error code otherwise, in which case the system cannot enter the desired
+ * sleep state (@enter() and @finish() will not be called in that case).
+ *
+ * @enter: Enter the system sleep state indicated by @set_target() or
+ * represented by the argument if @set_target() is not implemented.
+ * This callback is mandatory. It returns 0 on success or a negative
+ * error code otherwise, in which case the system cannot enter the desired
+ * sleep state.
+ *
+ * @finish: Called when the system has just left a sleep state, right after
+ * the nonboot CPUs have been enabled and before devices are resumed (it is
+ * executed with IRQs enabled). If @set_target() is not implemented, the
+ * argument represents the sleep state being left.
+ * This callback is optional, but should be implemented by the platforms
+ * that implement @prepare(). If implemented, it is always called after
+ * @enter() (even if @enter() fails).
+ */
struct pm_ops {
- suspend_disk_method_t pm_disk_mode;
int (*valid)(suspend_state_t state);
+ int (*set_target)(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 *);
+#ifdef CONFIG_SUSPEND
extern struct pm_ops *pm_ops;
+
+/**
+ * pm_set_ops - set platform dependent power management ops
+ * @pm_ops: The new power management operations to set.
+ */
+extern void pm_set_ops(struct pm_ops *pm_ops);
+extern int pm_valid_only_mem(suspend_state_t state);
+
+/**
+ * arch_suspend_disable_irqs - disable IRQs for suspend
+ *
+ * Disables IRQs (in the default case). This is a weak symbol in the common
+ * code and thus allows architectures to override it if more needs to be
+ * done. Not called for suspend to disk.
+ */
+extern void arch_suspend_disable_irqs(void);
+
+/**
+ * arch_suspend_enable_irqs - enable IRQs after suspend
+ *
+ * Enables IRQs (in the default case). This is a weak symbol in the common
+ * code and thus allows architectures to override it if more needs to be
+ * done. Not called for suspend to disk.
+ */
+extern void arch_suspend_enable_irqs(void);
+
extern int pm_suspend(suspend_state_t state);
+#else /* !CONFIG_SUSPEND */
+#define suspend_valid_only_mem NULL
+static inline void pm_set_ops(struct pm_ops *pm_ops) {}
+static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
+#endif /* !CONFIG_SUSPEND */
/*
* Device power management
struct dev_pm_info {
pm_message_t power_state;
unsigned can_wakeup:1;
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
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_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;
-
+#ifdef CONFIG_PM_SLEEP
extern int device_suspend(pm_message_t state);
extern int device_prepare_suspend(pm_message_t state);
#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) \
__suspend_report_result(__FUNCTION__, fn, ret); \
} while (0)
-#else /* !CONFIG_PM */
+/*
+ * Platform hook to activate device wakeup capability, if that's not already
+ * handled by enable_irq_wake() etc.
+ * Returns zero on success, else negative errno
+ */
+extern int (*platform_enable_wakeup)(struct device *dev, int is_on);
-static inline int device_suspend(pm_message_t state)
+static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
{
+ if (platform_enable_wakeup)
+ return (*platform_enable_wakeup)(dev, is_on);
return 0;
}
-#define device_set_wakeup_enable(dev,val) do{}while(0)
-#define device_may_wakeup(dev) (0)
+#else /* !CONFIG_PM_SLEEP */
-static inline int dpm_runtime_suspend(struct device * dev, pm_message_t state)
+static inline int device_suspend(pm_message_t state)
{
return 0;
}
-static inline void dpm_runtime_resume(struct device * dev)
-{
-}
+#define device_set_wakeup_enable(dev,val) do{}while(0)
+#define device_may_wakeup(dev) (0)
#define suspend_report_result(fn, ret) do { } while (0)
-#endif
+static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
+{
+ return 0;
+}
+
+#endif /* !CONFIG_PM_SLEEP */
/* changes to device_may_wakeup take effect on the next pm state change.
* by default, devices should wakeup if they can.
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff