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The AtaPortRequestPowerStateChange routine requests a power state transition for the indicated device.
Note The ATA port driver and ATA miniport driver models may be altered or unavailable in the future. Instead, we recommend using the Storport driver and Storport miniport driver models.
Syntax
VOID AtaPortRequestPowerStateChange(
PVOID ChannelExtension,
UCHAR TargetId,
UCHAR Lun,
IDE_POWER_STATE DesiredPowerState
);
Parameters
ChannelExtension
A pointer to the channel extension.
TargetId
Specifies the target identifier of the device.
Lun
Specifies the logical unit number (LUN).
DesiredPowerState
Contains an enumerator value of type IDE_POWER_STATE that indicates the power state to which the indicated device should be changed.
Return value
None
Remarks
The AtaPortRequestPowerStateChange routine is used when a miniport driver might have to initiate a power state change, such as when a hot-plug operation occurs.
Note The practice of doing idle detection from an ATA miniport driver is discouraged.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Desktop |
| Header | irb.h (include Ata.h, Irb.h) |