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Extensible Firmware Interface Specification
14-2 12/01/02 Version 1.10
EFI_USB_HC_PROTOCOL
Summary
Provides basic USB host controller management, basic data transactions over USB bus, and USB
root hub access.
GUID
#define EFI_USB_HC_PROTOCOL_GUID \
{0xF5089266,0x1AA0,0x4953,0x97,0xD8,0x56,0x2F,0x8A,0x73,0xB5,0x19}
Protocol Interface Structure
typedef struct _EFI_USB_HC_PROTOCOL {
EFI_USB_HC_PROTOCOL_RESET Reset;
EFI_USB_HC_PROTOCOL_GET_STATE GetState;
EFI_USB_HC_PROTOCOL_SET_STATE SetState;
EFI_USB_HC_PROTOCOL_CONTROL_TRANSFER ControlTransfer;
EFI_USB_HC_PROTOCOL_BULK_TRANSFER BulkTransfer;
EFI_USB_HC_PROTOCOL_ASYNC_INTERRUPT_TRANSFER
AsyncInterruptTransfer;
EFI_USB_HC_PROTOCOL_SYNC_INTERRUPT_TRANSFER
SyncInterruptTransfer;
EFI_USB_HC_PROTOCOL_ISOCHRONOUS_TRANSFER
IsochronousTransfer;
EFI_USB_HC_PROTOCOL_ASYNC_ISOCHRONOUS_TRANSFER
AsyncIsochronousTransfer;
EFI_USB_HC_PROTOCOL_GET_ROOTHUB_PORT_NUMBER
GetRootHubPortNumber;
EFI_USB_HC_PROTOCOL_GET_ROOTHUB_PORT_STATUS
GetRootHubPortStatus;
EFI_USB_HC_PROTOCOL_SET_ROOTHUB_PORT_FEATURE
SetRootHubPortFeature;
EFI_USB_HC_PROTOCOL_CLEAR_ROOTHUB_PORT_FEATURE
ClearRootHubPortFeature;
UINT16 MajorRevision;
UINT16 MinorRevision;
} EFI_USB_HC_PROTOCOL;
Parameters
Reset Software reset of USB. See the Reset() function description.
GetState Retrieves the current state of the USB host controller. See the
GetState()
function description.
SetState Sets the USB host controller to a specific state. See the
SetState()
function description.
ControlTransfer Submits a control transfer to a target USB device. See the
ControlTransfer()
function description.