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EFI_USBFN_IO_PROTOCOL.StartController

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The StartController function supplies power to the USB controller if needed and initializes hardware and internal data structures. The port must not be activated by this function.

Syntax

typedef
EFI_STATUS
(EFIAPI * EFI_USBFN_IO_START_CONTROLLER) (
  IN EFI_USBFN_IO_PROTOCOL        *This
  );

Parameters

This
A pointer to the EFI_USBFN_IO_PROTOCOL instance.

Return values

The function returns one of the following values:

Return code Description
EFI_SUCCESS The function returned successfully.
EFI_INVALID_PARAMETER A parameter is invalid.
EFI_DEVICE_ERROR The physical device reported an error.

Remarks

This function is available starting in revision 0x00010001 of the EFI_USBFN_IO_PROTOCOL.

Requirements

Header: User generated