MdePkg/Include/Protocol/UsbHostController.h

   1 /** @file
   2   EFI_USB_HC_PROTOCOL as defined in EFI 1.10.
   3
   4   The USB Host Controller Protocol is used by code, typically USB bus drivers,
   5   running in the EFI boot services environment, to perform data transactions
   6   over a USB bus. In addition, it provides an abstraction for the root hub of the USB bus.
   7
   8   Copyright (c) 2006 - 2008, Intel Corporation
   9   All rights reserved. This program and the accompanying materials
  10   are licensed and made available under the terms and conditions of the BSD License
  11   which accompanies this distribution.  The full text of the license may be found at
  12   http://opensource.org/licenses/bsd-license.php
  13
  14   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  15   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  16
  17 **/
  18
  19 #ifndef _USB_HOSTCONTROLLER_H_
  20 #define _USB_HOSTCONTROLLER_H_
  21
  22 #include <Protocol/Usb2HostController.h>
  23
  24 #define EFI_USB_HC_PROTOCOL_GUID \
  25   { \
  26     0xf5089266, 0x1aa0, 0x4953, {0x97, 0xd8, 0x56, 0x2f, 0x8a, 0x73, 0xb5, 0x19 } \
  27   }
  28
  29 //
  30 // Forward reference for pure ANSI compatability
  31 //
  32 typedef struct _EFI_USB_HC_PROTOCOL EFI_USB_HC_PROTOCOL;
  33
  34 //
  35 // Protocol definitions
  36 //
  37
  38 /**
  39   Provides software reset for the USB host controller.
  40
  41   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
  42   @param  Attributes            A bit mask of the reset operation to perform.
  43
  44   @retval EFI_SUCCESS           The reset operation succeeded.
  45   @retval EFI_UNSUPPORTED       The type of reset specified by Attributes is not currently supported
  46                                 by the host controller hardware.
  47   @retval EFI_INVALID_PARAMETER Attributes is not valid.
  48   @retval EFI_DEVICE_ERROR      An error was encountered while attempting to perform the reset operation.
  49
  50 **/
  51 typedef
  52 EFI_STATUS
  53 (EFIAPI *EFI_USB_HC_PROTOCOL_RESET)(
  54   IN EFI_USB_HC_PROTOCOL     *This,
  55   IN UINT16                  Attributes
  56   );
  57
  58 /**
  59   Retrieves current state of the USB host controller.
  60
  61   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
  62   @param  State                 A pointer to the EFI_USB_HC_STATE data structure that
  63                                 indicates current state of the USB host controller.
  64
  65   @retval EFI_SUCCESS           The state information of the host controller was returned in State.
  66   @retval EFI_INVALID_PARAMETER State is NULL.
  67   @retval EFI_DEVICE_ERROR      An error was encountered while attempting to retrieve the host controller's
  68                                 current state.
  69
  70 **/
  71 typedef
  72 EFI_STATUS
  73 (EFIAPI *EFI_USB_HC_PROTOCOL_GET_STATE)(
  74   IN  EFI_USB_HC_PROTOCOL    *This,
  75   OUT EFI_USB_HC_STATE       *State
  76   );
  77
  78 /**
  79   Sets the USB host controller to a specific state.
  80
  81   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
  82   @param  State                 Indicates the state of the host controller that will be set.
  83
  84   @retval EFI_SUCCESS           The USB host controller was successfully placed in the state specified by
  85                                 State.
  86   @retval EFI_INVALID_PARAMETER State is NULL.
  87   @retval EFI_DEVICE_ERROR      Failed to set the state specified by State due to device error.
  88
  89 **/
  90 typedef
  91 EFI_STATUS
  92 (EFIAPI *EFI_USB_HC_PROTOCOL_SET_STATE)(
  93   IN EFI_USB_HC_PROTOCOL     *This,
  94   IN EFI_USB_HC_STATE        State
  95   );
  96
  97 /**
  98   Submits control transfer to a target USB device.
  99
 100   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
 101   @param  DeviceAddress         Represents the address of the target device on the USB, which is
 102                                 assigned during USB enumeration.
 103   @param  IsSlowDevice          Indicates whether the target device is slow device or full-speed
 104                                 device.
 105   @param  MaximumPacketLength   Indicates the maximum packet size that the default control
 106                                 transfer endpoint is capable of sending or receiving.
 107   @param  Request               A pointer to the USB device request that will be sent to the USB
 108                                 device.
 109   @param  TransferDirection     Specifies the data direction for the transfer.
 110   @param  Data                  A pointer to the buffer of data that will be transmitted to USB
 111                                 device or received from USB device.
 112   @param  DataLength            On input, indicates the size, in bytes, of the data buffer specified
 113                                 by Data. On output, indicates the amount of data actually
 114                                 transferred.
 115   @param  TimeOut               Indicates the maximum time, in milliseconds, which the transfer
 116                                 is allowed to complete.
 117   @param  TransferResult        A pointer to the detailed result information generated by this
 118                                 control transfer.
 119
 120   @retval EFI_SUCCESS           The control transfer was completed successfully.
 121   @retval EFI_OUT_OF_RESOURCES  The control transfer could not be completed due to a lack of resources.
 122   @retval EFI_INVALID_PARAMETER Some parameters are invalid.
 123   @retval EFI_TIMEOUT           The control transfer failed due to timeout.
 124   @retval EFI_DEVICE_ERROR      The control transfer failed due to host controller or device error.
 125
 126 **/
 127 typedef
 128 EFI_STATUS
 129 (EFIAPI *EFI_USB_HC_PROTOCOL_CONTROL_TRANSFER)(
 130   IN     EFI_USB_HC_PROTOCOL       *This,
 131   IN     UINT8                     DeviceAddress,
 132   IN     BOOLEAN                   IsSlowDevice,
 133   IN     UINT8                     MaximumPacketLength,
 134   IN     EFI_USB_DEVICE_REQUEST    *Request,
 135   IN     EFI_USB_DATA_DIRECTION    TransferDirection,
 136   IN OUT VOID                      *Data       OPTIONAL,
 137   IN OUT UINTN                     *DataLength OPTIONAL,
 138   IN     UINTN                     TimeOut,
 139   OUT    UINT32                    *TransferResult
 140   );
 141
 142 /**
 143   Submits bulk transfer to a bulk endpoint of a USB device.
 144
 145   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
 146   @param  DeviceAddress         Represents the address of the target device on the USB, which is
 147                                 assigned during USB enumeration.
 148   @param  EndPointAddress       The combination of an endpoint number and an endpoint
 149                                 direction of the target USB device.
 150   @param  MaximumPacketLength   Indicates the maximum packet size that the default control
 151                                 transfer endpoint is capable of sending or receiving.
 152   @param  Data                  A pointer to the buffer of data that will be transmitted to USB
 153                                 device or received from USB device.
 154   @param  DataLength            On input, indicates the size, in bytes, of the data buffer specified
 155                                 by Data. On output, indicates the amount of data actually
 156                                 transferred.
 157   @param  DataToggle            A pointer to the data toggle value.
 158   @param  TimeOut               Indicates the maximum time, in milliseconds, which the transfer
 159                                 is allowed to complete.
 160   @param  TransferResult        A pointer to the detailed result information of the bulk transfer.
 161
 162   @retval EFI_SUCCESS           The bulk transfer was completed successfully.
 163   @retval EFI_OUT_OF_RESOURCES  The bulk transfer could not be completed due to a lack of resources.
 164   @retval EFI_INVALID_PARAMETER Some parameters are invalid.
 165   @retval EFI_TIMEOUT           The bulk transfer failed due to timeout.
 166   @retval EFI_DEVICE_ERROR      The bulk transfer failed due to host controller or device error.
 167
 168 **/
 169 typedef
 170 EFI_STATUS
 171 (EFIAPI *EFI_USB_HC_PROTOCOL_BULK_TRANSFER)(
 172   IN     EFI_USB_HC_PROTOCOL    *This,
 173   IN     UINT8                  DeviceAddress,
 174   IN     UINT8                  EndPointAddress,
 175   IN     UINT8                  MaximumPacketLength,
 176   IN OUT VOID                   *Data,
 177   IN OUT UINTN                  *DataLength,
 178   IN OUT UINT8                  *DataToggle,
 179   IN     UINTN                  TimeOut,
 180   OUT    UINT32                 *TransferResult
 181   );
 182
 183 /**
 184   Submits an asynchronous interrupt transfer to an interrupt endpoint of a USB device.
 185
 186   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
 187   @param  DeviceAddress         Represents the address of the target device on the USB, which is
 188                                 assigned during USB enumeration.
 189   @param  EndPointAddress       The combination of an endpoint number and an endpoint
 190                                 direction of the target USB device.
 191   @param  IsSlowDevice          Indicates whether the target device is slow device or full-speed
 192                                 device.
 193   @param  MaximumPacketLength   Indicates the maximum packet size that the default control
 194                                 transfer endpoint is capable of sending or receiving.
 195   @param  IsNewTransfer         If TRUE, an asynchronous interrupt pipe is built between the host
 196                                 and the target interrupt endpoint. If FALSE, the specified
 197   @param  DataToggle            A pointer to the data toggle value.
 198   @param  PollingInterval       Indicates the interval, in milliseconds, that the asynchronous
 199                                 interrupt transfer is polled.                                                                                                      asynchronous interrupt pipe is canceled.
 200   @param  DataLength            Indicates the length of data to be received at the rate specified by
 201                                 PollingInterval from the target asynchronous interrupt
 202                                 endpoint.
 203   @param  CallBackFunction      The Callback function.
 204   @param  Context               The context that is passed to the CallBackFunction.
 205
 206   @retval EFI_SUCCESS           The asynchronous interrupt transfer request has been successfully
 207                                 submitted or canceled.
 208   @retval EFI_OUT_OF_RESOURCES  The request could not be completed due to a lack of resources.
 209   @retval EFI_INVALID_PARAMETER Some parameters are invalid.
 210   @retval EFI_TIMEOUT           The bulk transfer failed due to timeout.
 211   @retval EFI_DEVICE_ERROR      The bulk transfer failed due to host controller or device error.
 212
 213 **/
 214 typedef
 215 EFI_STATUS
 216 (EFIAPI *EFI_USB_HC_PROTOCOL_ASYNC_INTERRUPT_TRANSFER)(
 217   IN     EFI_USB_HC_PROTOCOL                                 *This,
 218   IN     UINT8                                               DeviceAddress,
 219   IN     UINT8                                               EndPointAddress,
 220   IN     BOOLEAN                                             IsSlowDevice,
 221   IN     UINT8                                               MaxiumPacketLength,
 222   IN     BOOLEAN                                             IsNewTransfer,
 223   IN OUT UINT8                                               *DataToggle,
 224   IN     UINTN                                               PollingInterval  OPTIONAL,
 225   IN     UINTN                                               DataLength       OPTIONAL,
 226   IN     EFI_ASYNC_USB_TRANSFER_CALLBACK                     CallBackFunction OPTIONAL,
 227   IN     VOID                                                *Context         OPTIONAL
 228   );
 229
 230 /**
 231   Submits synchronous interrupt transfer to an interrupt endpoint of a USB device.
 232
 233   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
 234   @param  DeviceAddress         Represents the address of the target device on the USB, which is
 235                                 assigned during USB enumeration.
 236   @param  EndPointAddress       The combination of an endpoint number and an endpoint
 237                                 direction of the target USB device.
 238   @param  IsSlowDevice          Indicates whether the target device is slow device or full-speed
 239                                 device.
 240   @param  MaximumPacketLength   Indicates the maximum packet size that the default control
 241                                 transfer endpoint is capable of sending or receiving.
 242   @param  Data                  A pointer to the buffer of data that will be transmitted to USB
 243                                 device or received from USB device.                                                                                            asynchronous interrupt pipe is canceled.
 244   @param  DataLength            On input, the size, in bytes, of the data buffer specified by Data.
 245                                 On output, the number of bytes transferred.
 246   @param  DataToggle            A pointer to the data toggle value.
 247   @param  TimeOut               Indicates the maximum time, in milliseconds, which the transfer
 248                                 is allowed to complete.
 249   @param  TransferResult        A pointer to the detailed result information from the synchronous
 250                                 interrupt transfer.
 251
 252   @retval EFI_SUCCESS           The synchronous interrupt transfer was completed successfully.
 253   @retval EFI_OUT_OF_RESOURCES  The request could not be completed due to a lack of resources.
 254   @retval EFI_INVALID_PARAMETER Some parameters are invalid.
 255   @retval EFI_TIMEOUT           The synchronous interrupt transfer failed due to timeout.
 256   @retval EFI_DEVICE_ERROR      The synchronous interrupt transfer failed due to host controller or device error.
 257
 258 **/
 259 typedef
 260 EFI_STATUS
 261 (EFIAPI *EFI_USB_HC_PROTOCOL_SYNC_INTERRUPT_TRANSFER)(
 262   IN     EFI_USB_HC_PROTOCOL    *This,
 263   IN     UINT8                  DeviceAddress,
 264   IN     UINT8                  EndPointAddress,
 265   IN     BOOLEAN                IsSlowDevice,
 266   IN     UINT8                  MaximumPacketLength,
 267   IN OUT VOID                   *Data,
 268   IN OUT UINTN                  *DataLength,
 269   IN OUT UINT8                  *DataToggle,
 270   IN     UINTN                  TimeOut,
 271   OUT    UINT32                 *TransferResult
 272   );
 273
 274 /**
 275   Submits isochronous transfer to an isochronous endpoint of a USB device.
 276
 277   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
 278   @param  DeviceAddress         Represents the address of the target device on the USB, which is
 279                                 assigned during USB enumeration.
 280   @param  EndPointAddress       The combination of an endpoint number and an endpoint
 281                                 direction of the target USB device.
 282   @param  MaximumPacketLength   Indicates the maximum packet size that the default control
 283                                 transfer endpoint is capable of sending or receiving.
 284   @param  Data                  A pointer to the buffer of data that will be transmitted to USB
 285                                 device or received from USB device.                                                                                            asynchronous interrupt pipe is canceled.
 286   @param  DataLength            Specifies the length, in bytes, of the data to be sent to or received
 287                                 from the USB device.
 288   @param  TransferResult        A pointer to the detailed result information from the isochronous
 289                                 transfer.
 290
 291   @retval EFI_SUCCESS           The isochronous transfer was completed successfully.
 292   @retval EFI_OUT_OF_RESOURCES  The isochronous could not be completed due to a lack of resources.
 293   @retval EFI_INVALID_PARAMETER Some parameters are invalid.
 294   @retval EFI_TIMEOUT           The isochronous transfer failed due to timeout.
 295   @retval EFI_DEVICE_ERROR      The isochronous transfer failed due to host controller or device error.
 296
 297 **/
 298 typedef
 299 EFI_STATUS
 300 (EFIAPI *EFI_USB_HC_PROTOCOL_ISOCHRONOUS_TRANSFER)(
 301   IN     EFI_USB_HC_PROTOCOL    *This,
 302   IN     UINT8                  DeviceAddress,
 303   IN     UINT8                  EndPointAddress,
 304   IN     UINT8                  MaximumPacketLength,
 305   IN OUT VOID                   *Data,
 306   IN     UINTN                  DataLength,
 307   OUT    UINT32                 *TransferResult
 308   );
 309
 310 /**
 311   Submits nonblocking isochronous transfer to an isochronous endpoint of a USB device.
 312
 313   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
 314   @param  DeviceAddress         Represents the address of the target device on the USB, which is
 315                                 assigned during USB enumeration.
 316   @param  EndPointAddress       The combination of an endpoint number and an endpoint
 317                                 direction of the target USB device.
 318   @param  MaximumPacketLength   Indicates the maximum packet size that the default control
 319                                 transfer endpoint is capable of sending or receiving.
 320   @param  Data                  A pointer to the buffer of data that will be transmitted to USB
 321                                 device or received from USB device.                                                                                            asynchronous interrupt pipe is canceled.
 322   @param  DataLength            Specifies the length, in bytes, of the data to be sent to or received
 323                                 from the USB device.
 324   @param  IsochronousCallback   The Callback function.
 325   @param  Context               Data passed to the IsochronousCallback function. This is
 326                                 an optional parameter and may be NULL.
 327
 328   @retval EFI_SUCCESS           The asynchronous isochronous transfer was completed successfully.
 329   @retval EFI_OUT_OF_RESOURCES  The asynchronous isochronous could not be completed due to a lack of resources.
 330   @retval EFI_INVALID_PARAMETER Some parameters are invalid.
 331
 332 **/
 333 typedef
 334 EFI_STATUS
 335 (EFIAPI *EFI_USB_HC_PROTOCOL_ASYNC_ISOCHRONOUS_TRANSFER)(
 336   IN     EFI_USB_HC_PROTOCOL                *This,
 337   IN     UINT8                              DeviceAddress,
 338   IN     UINT8                              EndPointAddress,
 339   IN     UINT8                              MaximumPacketLength,
 340   IN OUT VOID                               *Data,
 341   IN     UINTN                              DataLength,
 342   IN     EFI_ASYNC_USB_TRANSFER_CALLBACK    IsochronousCallBack,
 343   IN     VOID                               *Context OPTIONAL
 344   );
 345
 346 /**
 347   Retrieves the number of root hub ports.
 348
 349   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
 350   @param  PortNumber            A pointer to the number of the root hub ports.
 351
 352   @retval EFI_SUCCESS           The port number was retrieved successfully.
 353   @retval EFI_DEVICE_ERROR      An error was encountered while attempting to retrieve the port number.
 354   @retval EFI_INVALID_PARAMETER PortNumber is NULL.
 355
 356 **/
 357 typedef
 358 EFI_STATUS
 359 (EFIAPI *EFI_USB_HC_PROTOCOL_GET_ROOTHUB_PORT_NUMBER)(
 360   IN EFI_USB_HC_PROTOCOL    *This,
 361   OUT UINT8                 *PortNumber
 362   );
 363
 364 /**
 365   Retrieves the current status of a USB root hub port.
 366
 367   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
 368   @param  PortNumber            Specifies the root hub port from which the status is to be retrieved.
 369                                 This value is zero based.
 370   @param  PortStatus            A pointer to the current port status bits and port status change bits.
 371
 372   @retval EFI_SUCCESS           The status of the USB root hub port specified by PortNumber
 373                                 was returned in PortStatus.
 374   @retval EFI_INVALID_PARAMETER PortNumber is invalid.
 375
 376 **/
 377 typedef
 378 EFI_STATUS
 379 (EFIAPI *EFI_USB_HC_PROTOCOL_GET_ROOTHUB_PORT_STATUS)(
 380   IN EFI_USB_HC_PROTOCOL     *This,
 381   IN  UINT8                  PortNumber,
 382   OUT EFI_USB_PORT_STATUS    *PortStatus
 383   );
 384
 385 /**
 386   Sets a feature for the specified root hub port.
 387
 388   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
 389   @param  PortNumber            Specifies the root hub port from which the status is to be retrieved.
 390                                 This value is zero based.
 391   @param  PortFeature           Indicates the feature selector associated with the feature set
 392                                 request.
 393
 394   @retval EFI_SUCCESS           The feature specified by PortFeature was set for the USB
 395                                 root hub port specified by PortNumber.
 396   @retval EFI_INVALID_PARAMETER PortNumber is invalid or PortFeature is invalid for this function.
 397
 398 **/
 399 typedef
 400 EFI_STATUS
 401 (EFIAPI *EFI_USB_HC_PROTOCOL_SET_ROOTHUB_PORT_FEATURE)(
 402   IN EFI_USB_HC_PROTOCOL     *This,
 403   IN UINT8                   PortNumber,
 404   IN EFI_USB_PORT_FEATURE    PortFeature
 405   );
 406
 407 /**
 408   Clears a feature for the specified root hub port.
 409
 410   @param  This                  A pointer to the EFI_USB_HC_PROTOCOL instance.
 411   @param  PortNumber            Specifies the root hub port from which the status is to be cleared.
 412                                 This value is zero based.
 413   @param  PortFeature           Indicates the feature selector associated with the feature clear
 414                                 request.
 415
 416   @retval EFI_SUCCESS           The feature specified by PortFeature was cleared for the USB
 417                                 root hub port specified by PortNumber.
 418   @retval EFI_INVALID_PARAMETER PortNumber is invalid or PortFeature is invalid for this function.
 419
 420 **/
 421 typedef
 422 EFI_STATUS
 423 (EFIAPI *EFI_USB_HC_PROTOCOL_CLEAR_ROOTHUB_PORT_FEATURE)(
 424   IN EFI_USB_HC_PROTOCOL     *This,
 425   IN UINT8                   PortNumber,
 426   IN EFI_USB_PORT_FEATURE    PortFeature
 427   );
 428
 429
 430 /**
 431   @par Protocol Description:
 432   The EFI_USB_HC_PROTOCOL provides USB host controller management, basic data transactions
 433   over a USB bus, and USB root hub access. A device driver that wishes to manage a USB bus in a
 434   system retrieves the EFI_USB_HC_PROTOCOL instance that is associated with the USB bus to be
 435   managed. A device handle for a USB host controller will minimally contain an
 436   EFI_DEVICE_PATH_PROTOCOL instance, and an EFI_USB_HC_PROTOCOL instance.
 437
 438   @param Reset
 439   Software reset of USB.
 440
 441   @param GetState
 442   Retrieves the current state of the USB host controller.
 443
 444   @param SetState
 445   Sets the USB host controller to a specific state.
 446
 447   @param ControlTransfer
 448   Submits a control transfer to a target USB device.
 449
 450   @param BulkTransfer
 451   Submits a bulk transfer to a bulk endpoint of a USB device.
 452
 453   @param AsyncInterruptTransfer
 454   Submits an asynchronous interrupt transfer to an interrupt endpoint
 455   of a USB device.
 456
 457   @param SyncInterruptTransfer
 458   Submits a synchronous interrupt transfer to an interrupt endpoint
 459   of a USB device.
 460
 461   @param IsochronousTransfer
 462   Submits isochronous transfer to an isochronous endpoint of a USB device.
 463
 464   @param AsyncIsochronousTransfer
 465   Submits nonblocking USB isochronous transfer.
 466
 467   @param GetRootHubPortNumber
 468   Retrieves the number of root hub ports that are produced by the
 469   USB host controller.
 470
 471   @param GetRootHubPortStatus
 472   Retrieves the status of the specified root hub port.
 473
 474   @param SetRootHubPortFeature
 475   Sets the feature for the specified root hub port.
 476
 477   @param ClearRootHubPortFeature
 478   Clears the feature for the specified root hub port.
 479
 480   @param MajorRevision
 481   The major revision number of the USB host controller. The
 482   revision information indicates the release of the Universal Serial
 483   Bus Specification with which the host controller is compliant.
 484
 485   @param MinorRevision
 486   The minor revision number of the USB host controller. The
 487   revision information indicates the release of the Universal Serial
 488   Bus Specification with which the host controller is compliant.
 489
 490 **/
 491 struct _EFI_USB_HC_PROTOCOL {
 492   EFI_USB_HC_PROTOCOL_RESET                       Reset;
 493   EFI_USB_HC_PROTOCOL_GET_STATE                   GetState;
 494   EFI_USB_HC_PROTOCOL_SET_STATE                   SetState;
 495   EFI_USB_HC_PROTOCOL_CONTROL_TRANSFER            ControlTransfer;
 496   EFI_USB_HC_PROTOCOL_BULK_TRANSFER               BulkTransfer;
 497   EFI_USB_HC_PROTOCOL_ASYNC_INTERRUPT_TRANSFER    AsyncInterruptTransfer;
 498   EFI_USB_HC_PROTOCOL_SYNC_INTERRUPT_TRANSFER     SyncInterruptTransfer;
 499   EFI_USB_HC_PROTOCOL_ISOCHRONOUS_TRANSFER        IsochronousTransfer;
 500   EFI_USB_HC_PROTOCOL_ASYNC_ISOCHRONOUS_TRANSFER  AsyncIsochronousTransfer;
 501   EFI_USB_HC_PROTOCOL_GET_ROOTHUB_PORT_NUMBER     GetRootHubPortNumber;
 502   EFI_USB_HC_PROTOCOL_GET_ROOTHUB_PORT_STATUS     GetRootHubPortStatus;
 503   EFI_USB_HC_PROTOCOL_SET_ROOTHUB_PORT_FEATURE    SetRootHubPortFeature;
 504   EFI_USB_HC_PROTOCOL_CLEAR_ROOTHUB_PORT_FEATURE  ClearRootHubPortFeature;
 505   UINT16                                          MajorRevision;
 506   UINT16                                          MinorRevision;
 507 };
 508
 509 extern EFI_GUID gEfiUsbHcProtocolGuid;
 510
 511 #endif