Intel Extensible Firmware Interface - Manual (Page 570)

Extensible Firmware Interface Specification
14-30 12/01/02 Version 1.10
EFI_USB_HC_PROTOCOL.SetRootHubPortFeature()
Summary
Sets a feature for the specified root hub port.
Prototype
typedef
EFI_STATUS
(EFIAPI *EFI_USB_HC_PROTOCOL_SET_ROOTHUB_PORT_FEATURE) (
IN EFI_USB_HC_PROTOCOL
*This,
IN UINT8 PortNumber,
IN EFI_USB_PORT_FEATURE PortFeature
);
Parameters
This A pointer to the EFI_USB_HC_PROTOCOL instance. Type
EFI_USB_HC_PROTOCOL is defined in Section 14.1.
PortNumber Specifies the root hub port whose feature is requested to be set.
This value is zero based. For example, if a root hub has two ports,
then the first port is number 0, and the second port is numbered 1.
PortFeature Indicates the feature selector associated with the feature set
request. The port feature indicator is defined in “Related
Definitions” and Table 14-3 below.
Related Definitions
typedef enum {
EfiUsbPortEnable
= 1,
EfiUsbPortSuspend = 2,
EfiUsbPortReset
= 4,
EfiUsbPortPower = 8,
EfiUsbPortConnectChange = 16,
EfiUsbPortEnableChange
= 17,
EfiUsbPortSuspendChange = 18,
EfiUsbPortOverCurrentChange = 19,
EfiUsbPortResetChange = 20
} EFI_USB_PORT_FEATURE;