Intel Extensible Firmware Interface - Manual (Page 578)

Extensible Firmware Interface Specification
14-38 12/01/02 Version 1.10
EFI_USB_IO Protocol
Summary
Provides services to manage and communicate with USB devices.
GUID
#define EFI_USB_IO_PROTOCOL_GUID \
{0x2B2F68D6,0x0CD2,0x44cf,0x8E,0x8B,0xBB,0xA2,0x0B,0x1B,0x5B,0x75}
Protocol Interface Structure
typedef struct _EFI_USB_IO_PROTOCOL {
EFI_USB_IO_CONTROL_TRANSFER
UsbControlTransfer;
EFI_USB_IO_BULK_TRANSFER UsbBulkTransfer;
EFI_USB_IO_ASYNC_INTERRUPT_TRANSFER
UsbAsyncInterruptTransfer;
EFI_USB_IO_SYNC_INTERRPUT_TRANSFER UsbSyncInterruptTransfer
EFI_USB_IO_ISOCHRONOUS_TRANSFER UsbIsochronousTransfer;
EFI_USB_IO_ASYNC_ISOCHRONOUS_TRANSFER
UsbAsyncIsochronousTransfer;
EFI_USB_IO_GET_DEVICE_DESCRIPTOR UsbGetDeviceDescriptor;
EFI_USB_IO_GET_CONFIG_DESCRIPTOR UsbGetConfigDescriptor;
EFI_USB_IO_GET_INTERFACE_DESCRIPTOR
UsbGetInterfaceDescriptor;
EFI_USB_IO_GET_ENDPOINT_DESCRIPTOR UsbGetEndpointDescriptor;
EFI_USB_IO_GET_STRING_DESCRIPTOR UsbGetStringDescriptor;
EFI_USB_IO_GET_SUPPORTED_LANGUAGES UsbGetSupportedLanguages;
EFI_USB_IO_PORT_RESET UsbPortReset;
} EFI_USB_IO_PROTOCOL;
Parameters
UsbControlTransfer Accesses the USB Device through USB Control
Transfer Pipe. See the UsbControlTransfer()
function description.
UsbBulkTransfer Accesses the USB Device through USB Bulk Transfer
Pipe. See the UsbBulkTransfer() function
description.
UsbAsyncInterruptTransfer Nonblock USB interrupt transfer. See the
UsbAsyncInterruptTransfer() function
description.
UsbSyncInterruptTransfer Accesses the USB Device through USB Synchronous
Interrupt Transfer Pipe. See the
UsbSyncInterruptTransfer() function
description.