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MdePkg[all]
1.08
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MdePkg[all]
1.08
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Data Structures | |
| struct | EFI_USB_PORT_STATUS |
| struct | EFI_USB2_HC_TRANSACTION_TRANSLATOR |
| struct | _EFI_USB2_HC_PROTOCOL |
Enumerations | |
| enum | EFI_USB_PORT_FEATURE { EfiUsbPortEnable = 1, EfiUsbPortSuspend = 2, EfiUsbPortReset = 4, EfiUsbPortPower = 8, EfiUsbPortOwner = 13, EfiUsbPortConnectChange = 16, EfiUsbPortEnableChange = 17, EfiUsbPortSuspendChange = 18, EfiUsbPortOverCurrentChange = 19, EfiUsbPortResetChange = 20 } |
| enum | EFI_USB_HC_STATE { EfiUsbHcStateHalt, EfiUsbHcStateOperational, EfiUsbHcStateSuspend, EfiUsbHcStateMaximum } |
Variables | |
| EFI_GUID | gEfiUsb2HcProtocolGuid |
EFI_USB2_HC_PROTOCOL as defined in UEFI 2.0. The USB Host Controller Protocol is used by code, typically USB bus drivers, running in the EFI boot services environment, to perform data transactions over a USB bus. In addition, it provides an abstraction for the root hub of the USB bus.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
| #define EFI_USB2_HC_PROTOCOL_GUID |
| #define EFI_USB_HC_RESET_GLOBAL 0x0001 |
| #define EFI_USB_HC_RESET_GLOBAL_WITH_DEBUG 0x0004 |
| #define EFI_USB_HC_RESET_HOST_CONTROLLER 0x0002 |
| #define EFI_USB_HC_RESET_HOST_WITH_DEBUG 0x0008 |
| #define EFI_USB_MAX_BULK_BUFFER_NUM 10 |
| #define EFI_USB_MAX_ISO_BUFFER_NUM 7 |
| #define EFI_USB_MAX_ISO_BUFFER_NUM1 2 |
| #define EFI_USB_SPEED_FULL 0x0000 |
12 Mb/s, USB 1.1 OHCI and UHCI HC.
| #define EFI_USB_SPEED_HIGH 0x0002 |
480 Mb/s, USB 2.0 EHCI HC.
| #define EFI_USB_SPEED_LOW 0x0001 |
1 Mb/s, USB 1.1 OHCI and UHCI HC.
| #define EFI_USB_SPEED_SUPER 0x0003 |
4.8 Gb/s, USB 3.0 XHCI HC.
| #define USB_PORT_STAT_C_CONNECTION 0x0001 |
EFI_USB_PORT_STATUS.PortChangeStatus bit definition
| #define USB_PORT_STAT_C_ENABLE 0x0002 |
| #define USB_PORT_STAT_C_OVERCURRENT 0x0008 |
| #define USB_PORT_STAT_C_RESET 0x0010 |
| #define USB_PORT_STAT_C_SUSPEND 0x0004 |
| #define USB_PORT_STAT_CONNECTION 0x0001 |
EFI_USB_PORT_STATUS.PortStatus bit definition
| #define USB_PORT_STAT_ENABLE 0x0002 |
| #define USB_PORT_STAT_HIGH_SPEED 0x0400 |
| #define USB_PORT_STAT_LOW_SPEED 0x0200 |
| #define USB_PORT_STAT_OVERCURRENT 0x0008 |
| #define USB_PORT_STAT_OWNER 0x2000 |
| #define USB_PORT_STAT_POWER 0x0100 |
| #define USB_PORT_STAT_RESET 0x0010 |
| #define USB_PORT_STAT_SUPER_SPEED 0x0800 |
| #define USB_PORT_STAT_SUSPEND 0x0004 |
| typedef struct _EFI_USB2_HC_PROTOCOL EFI_USB2_HC_PROTOCOL |
Forward reference for pure ANSI compatability
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_ASYNC_INTERRUPT_TRANSFER)(IN EFI_USB2_HC_PROTOCOL *This, IN UINT8 DeviceAddress, IN UINT8 EndPointAddress, IN UINT8 DeviceSpeed, IN UINTN MaxiumPacketLength, IN BOOLEAN IsNewTransfer, IN OUT UINT8 *DataToggle, IN UINTN PollingInterval, IN UINTN DataLength, IN EFI_USB2_HC_TRANSACTION_TRANSLATOR *Translator, IN EFI_ASYNC_USB_TRANSFER_CALLBACK CallBackFunction, IN VOID *Context) |
Submits an asynchronous interrupt transfer to an interrupt endpoint of a USB device. Translator parameter doesn't exist in UEFI2.0 spec, but it will be updated in the following specification version.
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| DeviceAddress | Represents the address of the target device on the USB. |
| EndPointAddress | The combination of an endpoint number and an endpoint direction of the target USB device. |
| DeviceSpeed | Indicates device speed. |
| MaximumPacketLength | Indicates the maximum packet size the target endpoint is capable of sending or receiving. |
| IsNewTransfer | If TRUE, an asynchronous interrupt pipe is built between the host and the target interrupt endpoint. If FALSE, the specified asynchronous interrupt pipe is canceled. If TRUE, and an interrupt transfer exists for the target end point, then EFI_INVALID_PARAMETER is returned. |
| DataToggle | A pointer to the data toggle value. |
| PollingInterval | Indicates the interval, in milliseconds, that the asynchronous interrupt transfer is polled. |
| DataLength | Indicates the length of data to be received at the rate specified by PollingInterval from the target asynchronous interrupt endpoint. |
| Translator | A pointr to the transaction translator data. |
| CallBackFunction | The Callback function. This function is called at the rate specified by PollingInterval. |
| Context | The context that is passed to the CallBackFunction. This is an optional parameter and may be NULL. |
| EFI_SUCCESS | The asynchronous interrupt transfer request has been successfully submitted or canceled. |
| EFI_INVALID_PARAMETER | Some parameters are invalid. |
| EFI_OUT_OF_RESOURCES | The request could not be completed due to a lack of resources. |
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_ASYNC_ISOCHRONOUS_TRANSFER)(IN EFI_USB2_HC_PROTOCOL *This, IN UINT8 DeviceAddress, IN UINT8 EndPointAddress, IN UINT8 DeviceSpeed, IN UINTN MaximumPacketLength, IN UINT8 DataBuffersNumber, IN OUT VOID *Data[EFI_USB_MAX_ISO_BUFFER_NUM], IN UINTN DataLength, IN EFI_USB2_HC_TRANSACTION_TRANSLATOR *Translator, IN EFI_ASYNC_USB_TRANSFER_CALLBACK IsochronousCallBack, IN VOID *Context) |
Submits nonblocking isochronous transfer to an isochronous endpoint of a USB device.
This is an asynchronous type of USB isochronous transfer. If the caller submits a USB isochronous transfer request through this function, this function will return immediately.
When the isochronous transfer completes, the IsochronousCallbackfunction will be triggered, the caller can know the transfer results. If the transfer is successful, the caller can get the data received or sent in this callback function.
The target endpoint is specified by DeviceAddressand EndpointAddress. Isochronous transfers are used when working with isochronous date. It provides periodic, continuous communication between the host and a device. Isochronous transfers can be used only by full-speed, high-speed, and super-speed devices.
High-speed isochronous transfers can be performed using multiple data buffers. The number of buffers that are actually prepared for the transfer is specified by DataBuffersNumber. For full-speed isochronous transfers this value is ignored.
Data represents a list of pointers to the data buffers. For full-speed isochronous transfers only the data pointed by Data[0] shall be used. For high-speed isochronous transfers and for the split transactions depending on DataLength there several data buffers can be used. For the high-speed isochronous transfers the total number of buffers must not exceed EFI_USB_MAX_ISO_BUFFER_NUM.
For split transactions performed on full-speed device by high-speed host controller the total number of buffers is limited to EFI_USB_MAX_ISO_BUFFER_NUM1.
EFI_INVALID_PARAMETER is returned if one of the following conditionsis satisfied:
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| DeviceAddress | Represents the address of the target device on the USB. |
| EndPointAddress | The combination of an endpoint number and an endpoint direction of the target USB device. |
| DeviceSpeed | Indicates device speed. The supported values are EFI_USB_SPEED_FULL, EFI_USB_SPEED_HIGH, or EFI_USB_SPEED_SUPER. |
| MaximumPacketLength | Indicates the maximum packet size the target endpoint is capable of sending or receiving. |
| DataBuffersNumber | Number of data buffers prepared for the transfer. |
| Data | Array of pointers to the buffers of data that will be transmitted to USB device or received from USB device. |
| DataLength | Specifies the length, in bytes, of the data to be sent to or received from the USB device. |
| Translator | A pointer to the transaction translator data. |
| IsochronousCallback | The Callback function. This function is called if the requested isochronous transfer is completed. |
| Context | Data passed to the IsochronousCallback function. This is an optional parameter and may be NULL. |
| EFI_SUCCESS | The asynchronous isochronous transfer request has been successfully submitted or canceled. |
| EFI_INVALID_PARAMETER | Some parameters are invalid. |
| EFI_OUT_OF_RESOURCES | The asynchronous isochronous transfer could not be submitted due to a lack of resources. |
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_BULK_TRANSFER)(IN EFI_USB2_HC_PROTOCOL *This, IN UINT8 DeviceAddress, IN UINT8 EndPointAddress, IN UINT8 DeviceSpeed, IN UINTN MaximumPacketLength, IN UINT8 DataBuffersNumber, IN OUT VOID *Data[EFI_USB_MAX_BULK_BUFFER_NUM], IN OUT UINTN *DataLength, IN OUT UINT8 *DataToggle, IN UINTN TimeOut, IN EFI_USB2_HC_TRANSACTION_TRANSLATOR *Translator, OUT UINT32 *TransferResult) |
Submits bulk transfer to a bulk endpoint of a USB device.
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| DeviceAddress | Represents the address of the target device on the USB. |
| EndPointAddress | The combination of an endpoint number and an endpoint direction of the target USB device. |
| DeviceSpeed | Indicates device speed. |
| MaximumPacketLength | Indicates the maximum packet size the target endpoint is capable of sending or receiving. |
| DataBuffersNumber | Number of data buffers prepared for the transfer. |
| Data | Array of pointers to the buffers of data that will be transmitted to USB device or received from USB device. |
| DataLength | When input, indicates the size, in bytes, of the data buffers specified by Data. When output, indicates the actually transferred data size. |
| DataToggle | A pointer to the data toggle value. |
| TimeOut | Indicates the maximum time, in milliseconds, which the transfer is allowed to complete. |
| Translator | A pointer to the transaction translator data. |
| TransferResult | A pointer to the detailed result information of the bulk transfer. |
| EFI_SUCCESS | The bulk transfer was completed successfully. |
| EFI_INVALID_PARAMETER | Some parameters are invalid. |
| EFI_OUT_OF_RESOURCES | The bulk transfer could not be submitted due to a lack of resources. |
| EFI_TIMEOUT | The bulk transfer failed due to timeout. |
| EFI_DEVICE_ERROR | The bulk transfer failed due to host controller or device error. Caller should check TransferResult for detailed error information. |
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_CLEAR_ROOTHUB_PORT_FEATURE)(IN EFI_USB2_HC_PROTOCOL *This, IN UINT8 PortNumber, IN EFI_USB_PORT_FEATURE PortFeature) |
Clears a feature for the specified root hub port.
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| PortNumber | Specifies the root hub port whose feature is requested to be cleared. This value is zero based. |
| PortFeature | Indicates the feature selector associated with the feature clear request. |
| EFI_SUCCESS | The feature specified by PortFeature was cleared for the USB root hub port specified by PortNumber. |
| EFI_INVALID_PARAMETER | PortNumber is invalid or PortFeature is invalid for this function. |
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_CONTROL_TRANSFER)(IN EFI_USB2_HC_PROTOCOL *This, IN UINT8 DeviceAddress, IN UINT8 DeviceSpeed, IN UINTN MaximumPacketLength, IN EFI_USB_DEVICE_REQUEST *Request, IN EFI_USB_DATA_DIRECTION TransferDirection, IN OUT VOID *Data, IN OUT UINTN *DataLength, IN UINTN TimeOut, IN EFI_USB2_HC_TRANSACTION_TRANSLATOR *Translator, OUT UINT32 *TransferResult) |
Submits control transfer to a target USB device.
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| DeviceAddress | Represents the address of the target device on the USB. |
| DeviceSpeed | Indicates device speed. |
| MaximumPacketLength | Indicates the maximum packet size that the default control transfer endpoint is capable of sending or receiving. |
| Request | A pointer to the USB device request that will be sent to the USB device. |
| TransferDirection | Specifies the data direction for the transfer. There are three values available, EfiUsbDataIn, EfiUsbDataOut and EfiUsbNoData. |
| Data | A pointer to the buffer of data that will be transmitted to USB device or received from USB device. |
| DataLength | On input, indicates the size, in bytes, of the data buffer specified by Data. On output, indicates the amount of data actually transferred. |
| TimeOut | Indicates the maximum time, in milliseconds, which the transfer is allowed to complete. |
| Translator | A pointer to the transaction translator data. |
| TransferResult | A pointer to the detailed result information generated by this control transfer. |
| EFI_SUCCESS | The control transfer was completed successfully. |
| EFI_INVALID_PARAMETER | Some parameters are invalid. |
| EFI_OUT_OF_RESOURCES | The control transfer could not be completed due to a lack of resources. |
| EFI_TIMEOUT | The control transfer failed due to timeout. |
| EFI_DEVICE_ERROR | The control transfer failed due to host controller or device error. Caller should check TransferResult for detailed error information. |
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_GET_CAPABILITY)(IN EFI_USB2_HC_PROTOCOL *This, OUT UINT8 *MaxSpeed, OUT UINT8 *PortNumber, OUT UINT8 *Is64BitCapable) |
Retrieves the Host Controller capabilities.
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| MaxSpeed | Host controller data transfer speed. |
| PortNumber | Number of the root hub ports. |
| Is64BitCapable | TRUE if controller supports 64-bit memory addressing, FALSE otherwise. |
| EFI_SUCCESS | The host controller capabilities were retrieved successfully. |
| EFI_INVALID_PARAMETER | One of the input args was NULL. |
| EFI_DEVICE_ERROR | An error was encountered while attempting to retrieve the capabilities. |
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_GET_ROOTHUB_PORT_STATUS)(IN EFI_USB2_HC_PROTOCOL *This, IN UINT8 PortNumber, OUT EFI_USB_PORT_STATUS *PortStatus) |
Retrieves the current status of a USB root hub port.
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| PortNumber | Specifies the root hub port from which the status is to be retrieved. This value is zero based. |
| PortStatus | A pointer to the current port status bits and port status change bits. |
| EFI_SUCCESS | The status of the USB root hub port specified by PortNumber was returned in PortStatus. |
| EFI_INVALID_PARAMETER | PortNumber is invalid. |
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_GET_STATE)(IN EFI_USB2_HC_PROTOCOL *This, OUT EFI_USB_HC_STATE *State) |
Retrieves current state of the USB host controller.
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| State | A pointer to the EFI_USB_HC_STATE data structure that indicates current state of the USB host controller. |
| EFI_SUCCESS | The state information of the host controller was returned in State. |
| EFI_INVALID_PARAMETER | State is NULL. |
| EFI_DEVICE_ERROR | An error was encountered while attempting to retrieve the host controller's current state. |
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_ISOCHRONOUS_TRANSFER)(IN EFI_USB2_HC_PROTOCOL *This, IN UINT8 DeviceAddress, IN UINT8 EndPointAddress, IN UINT8 DeviceSpeed, IN UINTN MaximumPacketLength, IN UINT8 DataBuffersNumber, IN OUT VOID *Data[EFI_USB_MAX_ISO_BUFFER_NUM], IN UINTN DataLength, IN EFI_USB2_HC_TRANSACTION_TRANSLATOR *Translator, OUT UINT32 *TransferResult) |
Submits isochronous transfer to an isochronous endpoint of a USB device.
This function is used to submit isochronous transfer to a target endpoint of a USB device. The target endpoint is specified by DeviceAddressand EndpointAddress. Isochronous transfers are used when working with isochronous date. It provides periodic, continuous communication between the host and a device. Isochronous transfers can beused only by full-speed, high-speed, and super-speed devices.
High-speed isochronous transfers can be performed using multiple data buffers. The number of buffers that are actually prepared for the transfer is specified by DataBuffersNumber. For full-speed isochronous transfers this value is ignored.
Data represents a list of pointers to the data buffers. For full-speed isochronous transfers only the data pointed by Data[0]shall be used. For high-speed isochronous transfers and for the split transactions depending on DataLengththere several data buffers canbe used. For the high-speed isochronous transfers the total number of buffers must not exceed EFI_USB_MAX_ISO_BUFFER_NUM.
For split transactions performed on full-speed device by high-speed host controller the total number of buffers is limited to EFI_USB_MAX_ISO_BUFFER_NUM1. If the isochronous transfer is successful, then EFI_SUCCESSis returned. The isochronous transfer is designed to be completed within one USB frame time, if it cannot be completed, 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 TransferResult.
EFI_INVALID_PARAMETERis returned if one of the following conditionsis satisfied:
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| DeviceAddress | Represents the address of the target device on the USB. |
| EndPointAddress | The combination of an endpoint number and an endpoint direction of the target USB device. |
| DeviceSpeed | Indicates device speed. The supported values are EFI_USB_SPEED_FULL, EFI_USB_SPEED_HIGH, or EFI_USB_SPEED_SUPER. |
| MaximumPacketLength | Indicates the maximum packet size the target endpoint is capable of sending or receiving. |
| DataBuffersNumber | Number of data buffers prepared for the transfer. |
| Data | Array of pointers to the buffers of data that will be transmitted to USB device or received from USB device. |
| DataLength | Specifies the length, in bytes, of the data to be sent to or received from the USB device. |
| Translator | A pointer to the transaction translator data. |
| TransferResult | A pointer to the detailed result information of the isochronous transfer. |
| EFI_SUCCESS | The isochronous transfer was completed successfully. |
| EFI_INVALID_PARAMETER | Some parameters are invalid. |
| EFI_OUT_OF_RESOURCES | The isochronous transfer could not be submitted due to a lack of resources. |
| EFI_TIMEOUT | The isochronous transfer cannot be completed within the one USB frame time. |
| EFI_DEVICE_ERROR | The isochronous transfer failed due to host controller or device error. Caller should check TransferResult for detailed error information. |
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_RESET)(IN EFI_USB2_HC_PROTOCOL *This, IN UINT16 Attributes) |
Provides software reset for the USB host controller.
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| Attributes | A bit mask of the reset operation to perform. |
| EFI_SUCCESS | The reset operation succeeded. |
| EFI_INVALID_PARAMETER | Attributes is not valid. |
| EFI_UNSUPPORTED | The type of reset specified by Attributes is not currently supported by the host controller hardware. |
| EFI_ACCESS_DENIED | Reset operation is rejected due to the debug port being configured and active; only EFI_USB_HC_RESET_GLOBAL_WITH_DEBUG or EFI_USB_HC_RESET_HOST_WITH_DEBUG reset Attributes can be used to perform reset operation for this host controller. |
| EFI_DEVICE_ERROR | An error was encountered while attempting to retrieve the capabilities. |
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_SET_ROOTHUB_PORT_FEATURE)(IN EFI_USB2_HC_PROTOCOL *This, IN UINT8 PortNumber, IN EFI_USB_PORT_FEATURE PortFeature) |
Sets a feature for the specified root hub port.
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| PortNumber | Specifies the root hub port whose feature is requested to be set. This value is zero based. |
| PortFeature | Indicates the feature selector associated with the feature set request. |
| EFI_SUCCESS | The feature specified by PortFeature was set for the USB root hub port specified by PortNumber. |
| EFI_INVALID_PARAMETER | PortNumber is invalid or PortFeature is invalid for this function. |
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_SET_STATE)(IN EFI_USB2_HC_PROTOCOL *This, IN EFI_USB_HC_STATE State) |
Sets the USB host controller to a specific state.
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| State | Indicates the state of the host controller that will be set. |
| EFI_SUCCESS | The USB host controller was successfully placed in the state specified by State. |
| EFI_INVALID_PARAMETER | State is not valid. |
| EFI_DEVICE_ERROR | Failed to set the state specified by State due to device error. |
| typedef EFI_STATUS(EFIAPI * EFI_USB2_HC_PROTOCOL_SYNC_INTERRUPT_TRANSFER)(IN EFI_USB2_HC_PROTOCOL *This, IN UINT8 DeviceAddress, IN UINT8 EndPointAddress, IN UINT8 DeviceSpeed, IN UINTN MaximumPacketLength, IN OUT VOID *Data, IN OUT UINTN *DataLength, IN OUT UINT8 *DataToggle, IN UINTN TimeOut, IN EFI_USB2_HC_TRANSACTION_TRANSLATOR *Translator, OUT UINT32 *TransferResult) |
Submits synchronous interrupt transfer to an interrupt endpoint of a USB device. Translator parameter doesn't exist in UEFI2.0 spec, but it will be updated in the following specification version.
| This | A pointer to the EFI_USB2_HC_PROTOCOL instance. |
| DeviceAddress | Represents the address of the target device on the USB. |
| EndPointAddress | The combination of an endpoint number and an endpoint direction of the target USB device. |
| DeviceSpeed | Indicates device speed. |
| MaximumPacketLength | Indicates the maximum packet size the target endpoint is capable of sending or receiving. |
| Data | A pointer to the buffer of data that will be transmitted to USB device or received from USB device. |
| DataLength | On input, the size, in bytes, of the data buffer specified by Data. On output, the number of bytes transferred. |
| DataToggle | A pointer to the data toggle value. |
| TimeOut | Indicates the maximum time, in milliseconds, which the transfer is allowed to complete. |
| Translator | A pointr to the transaction translator data. |
| TransferResult | A pointer to the detailed result information from the synchronous interrupt transfer. |
| EFI_SUCCESS | The synchronous interrupt transfer was completed successfully. |
| EFI_INVALID_PARAMETER | Some parameters are invalid. |
| EFI_OUT_OF_RESOURCES | The synchronous interrupt transfer could not be submitted due to a lack of resources. |
| EFI_TIMEOUT | The synchronous interrupt transfer failed due to timeout. |
| EFI_DEVICE_ERROR | The synchronous interrupt transfer failed due to host controller or device error. Caller should check TransferResult for detailed error information. |
| enum EFI_USB_HC_STATE |
Enumration value for status of USB HC.
| enum EFI_USB_PORT_FEATURE |
Usb port features value Each value indicates its bit index in the port status and status change bitmaps, if combines these two bitmaps into a 32-bit bitmap.
| EFI_GUID gEfiUsb2HcProtocolGuid |
1.8.6 
