#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;
-
-/* invalid must be 0 so struct pm_ops initialisers can leave it out */
-#define PM_DISK_INVALID ((__force suspend_disk_method_t) 0)
-#define PM_DISK_PLATFORM ((__force suspend_disk_method_t) 1)
-#define PM_DISK_SHUTDOWN ((__force suspend_disk_method_t) 2)
-#define PM_DISK_REBOOT ((__force suspend_disk_method_t) 3)
-#define PM_DISK_TEST ((__force suspend_disk_method_t) 4)
-#define PM_DISK_TESTPROC ((__force suspend_disk_method_t) 5)
-#define PM_DISK_MAX ((__force suspend_disk_method_t) 6)
+#define PM_SUSPEND_MAX ((__force suspend_state_t) 4)
/**
- * struct pm_ops - Callbacks for managing platform dependent suspend states.
- * @valid: Callback to determine whether the given state can be entered.
- * If %CONFIG_SOFTWARE_SUSPEND is set then %PM_SUSPEND_DISK is
- * always valid and never passed to this call.
- * If not assigned, all suspend states are advertised as valid
- * in /sys/power/state (but can still be rejected by prepare or enter.)
+ * 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.
*
- * @prepare: Prepare the platform for the given suspend state. Can return a
- * negative error code if necessary.
+ * @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.
*
- * @enter: Enter the given suspend state, must be assigned. Can return a
- * negative error code if necessary.
+ * @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).
*
- * @finish: Called when the system has left the given state and all devices
- * are resumed. The return value is ignored.
+ * @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.
*
- * @pm_disk_mode: The generic code always allows one of the shutdown methods
- * %PM_DISK_SHUTDOWN, %PM_DISK_REBOOT, %PM_DISK_TEST and
- * %PM_DISK_TESTPROC. If this variable is set, the mode it is set
- * to is allowed in addition to those modes and is also made default.
- * When this mode is sent selected, the @prepare call will be called
- * before suspending to disk (if present), the @enter call should be
- * present and will be called after all state has been saved and the
- * machine is ready to be powered off; the @finish callback is called
- * after state has been restored. All these calls are called with
- * %PM_SUSPEND_DISK as the 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 {
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);
- suspend_disk_method_t pm_disk_mode;
};
+#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 struct pm_ops *pm_ops;
-extern int pm_suspend(suspend_state_t state);
-
+extern int pm_valid_only_mem(suspend_state_t state);
/**
* arch_suspend_disable_irqs - disable IRQs for suspend
*/
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) \
return 0;
}
-#else /* !CONFIG_PM */
+#else /* !CONFIG_PM_SLEEP */
static inline int device_suspend(pm_message_t state)
{
#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)
static inline int call_platform_enable_wakeup(struct device *dev, int is_on)
{
- return -EIO;
+ return 0;
}
-#endif
+#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