Intel Extensible Firmware Interface - Manual (Page 584)

Extensible Firmware Interface Specification
14-44 12/01/02 Version 1.10
Description
This function allows a USB device driver to communicate with the USB device through Bulk
Transfer. The transfer direction is determined by the endpoint direction. If the USB transfer is
successful, then
EFI_SUCCESS is returned. If USB transfer cannot be completed within the
Timeout frame, EFI_TIMEOUT is returned. If an error other than timeout occurs during the
USB transfer, then EFI_DEVICE_ERROR is returned and the detailed status code will be returned
in the Status parameter.
Status Code Returned
EFI_SUCCESS The bulk transfer has been successfully executed.
EFI_INVALID_PARAMETER If DeviceEndpoint is not valid.
EFI_INVALID_PARAMETER Data is NULL .
EFI_INVALID_PARAMETER DataLength is NULL .
EFI_INVALID_PARAMETER Status is NULL .
EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
EFI_TIMEOUT The bulk transfer cannot be completed within Timeout timeframe.
EFI_DEVICE_ERROR The transfer failed other than timeout, and the transfer status is returned
in
Status .