MdePkg: Clean up source files

[mirror_edk2.git] / MdePkg / Include / Protocol / UsbIo.h

diff --git a/MdePkg/Include/Protocol/UsbIo.h b/MdePkg/Include/Protocol/UsbIo.h
index 47de143d852e900b2117e0b3229a7c809b094e33..1d102f17aa19350b9bc416f4b0460b766024ac18 100644 (file)
--- a/MdePkg/Include/Protocol/UsbIo.h
+++ b/MdePkg/Include/Protocol/UsbIo.h
@@ -1,22 +1,26 @@
 /** @file\r
 /** @file\r

-  EFI Usb I/O Protocol\r
+  EFI Usb I/O Protocol as defined in UEFI specification.\r
+  This protocol is used by code, typically drivers, running in the EFI\r
+  boot services environment to access USB devices like USB keyboards,\r
+  mice and mass storage devices. In particular, functions for managing devices\r
+  on USB buses are defined here.\r

 \r
 \r

-  Copyright (c) 2006, Intel Corporation                                                         \r
-  All rights reserved. This program and the accompanying materials                          \r
-  are licensed and made available under the terms and conditions of the BSD License         \r
-  which accompanies this distribution.  The full text of the license may be found at        \r
-  http://opensource.org/licenses/bsd-license.php                                            \r
+  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
+  This program and the accompanying materials\r
+  are licensed and made available under the terms and conditions of the BSD License\r
+  which accompanies this distribution.  The full text of the license may be found at\r
+  http://opensource.org/licenses/bsd-license.php\r

 \r
 \r

-  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
-  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
-\r
-  Module Name:  UsbIo.h\r
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r

 \r
 **/\r
 \r
 #ifndef __USB_IO_H__\r
 #define __USB_IO_H__\r
 \r
 \r
 **/\r
 \r
 #ifndef __USB_IO_H__\r
 #define __USB_IO_H__\r
 \r

+#include <IndustryStandard/Usb.h>\r
+\r

 //\r
 // Global ID for the USB I/O Protocol\r
 //\r
 //\r
 // Global ID for the USB I/O Protocol\r
 //\r


@@ -27,23 +31,59 @@
 \r
 typedef struct _EFI_USB_IO_PROTOCOL   EFI_USB_IO_PROTOCOL;\r
 \r
 \r
 typedef struct _EFI_USB_IO_PROTOCOL   EFI_USB_IO_PROTOCOL;\r
 \r

-/**                                                                 \r
+//\r
+// Related Definition for EFI USB I/O protocol\r
+//\r
+\r
+//\r
+// USB standard descriptors and reqeust\r
+//\r
+typedef USB_DEVICE_REQUEST        EFI_USB_DEVICE_REQUEST;\r
+typedef USB_DEVICE_DESCRIPTOR     EFI_USB_DEVICE_DESCRIPTOR;\r
+typedef USB_CONFIG_DESCRIPTOR     EFI_USB_CONFIG_DESCRIPTOR;\r
+typedef USB_INTERFACE_DESCRIPTOR  EFI_USB_INTERFACE_DESCRIPTOR;\r
+typedef USB_ENDPOINT_DESCRIPTOR   EFI_USB_ENDPOINT_DESCRIPTOR;\r
+\r
+///\r
+/// USB data transfer direction\r
+///\r
+typedef enum {\r
+  EfiUsbDataIn,\r
+  EfiUsbDataOut,\r
+  EfiUsbNoData\r
+} EFI_USB_DATA_DIRECTION;\r
+\r
+//\r
+// USB Transfer Results\r
+//\r
+#define EFI_USB_NOERROR             0x00\r
+#define EFI_USB_ERR_NOTEXECUTE      0x01\r
+#define EFI_USB_ERR_STALL           0x02\r
+#define EFI_USB_ERR_BUFFER          0x04\r
+#define EFI_USB_ERR_BABBLE          0x08\r
+#define EFI_USB_ERR_NAK             0x10\r
+#define EFI_USB_ERR_CRC             0x20\r
+#define EFI_USB_ERR_TIMEOUT         0x40\r
+#define EFI_USB_ERR_BITSTUFF        0x80\r
+#define EFI_USB_ERR_SYSTEM          0x100\r
+\r
+/**\r

   Async USB transfer callback routine.\r
   Async USB transfer callback routine.\r

-    \r
+\r

   @param  Data                  Data received or sent via the USB Asynchronous Transfer, if the\r
   @param  Data                  Data received or sent via the USB Asynchronous Transfer, if the\r

-                                transfer completed successfully.                               \r
+                                transfer completed successfully.\r

   @param  DataLength            The length of Data received or sent via the Asynchronous\r
   @param  DataLength            The length of Data received or sent via the Asynchronous\r

-                                Transfer, if transfer successfully completes.                                           \r
+                                Transfer, if transfer successfully completes.\r

   @param  Context               Data passed from UsbAsyncInterruptTransfer() request.\r
   @param  Status                Indicates the result of the asynchronous transfer.\r
   @param  Context               Data passed from UsbAsyncInterruptTransfer() request.\r
   @param  Status                Indicates the result of the asynchronous transfer.\r

-                                \r
-  @retval EFI_SUCCESS           The asynchronous USB transfer request has been successfully executed.  \r
+\r
+  @retval EFI_SUCCESS           The asynchronous USB transfer request has been successfully executed.\r

   @retval EFI_DEVICE_ERROR      The asynchronous USB transfer request failed.\r
   @retval EFI_DEVICE_ERROR      The asynchronous USB transfer request failed.\r

-                                   \r
+\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_ASYNC_USB_TRANSFER_CALLBACK) (\r
+(EFIAPI *EFI_ASYNC_USB_TRANSFER_CALLBACK)(\r

   IN VOID         *Data,\r
   IN UINTN        DataLength,\r
   IN VOID         *Context,\r
   IN VOID         *Data,\r
   IN UINTN        DataLength,\r
   IN VOID         *Context,\r


@@ -55,31 +95,31 @@ EFI_STATUS
 //\r
 \r
 \r
 //\r
 \r
 \r

-/**                                                                 \r
+/**\r

   This function is used to manage a USB device with a control transfer pipe. A control transfer is\r
   This function is used to manage a USB device with a control transfer pipe. A control transfer is\r

-  typically used to perform device initialization and configuration.                              \r
-    \r
-  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.                                \r
+  typically used to perform device initialization and configuration.\r
+\r
+  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.\r

   @param  Request               A pointer to the USB device request that will be sent to the USB\r
   @param  Request               A pointer to the USB device request that will be sent to the USB\r

-                                device.                                                         \r
+                                device.\r

   @param  Direction             Indicates the data direction.\r
   @param  Direction             Indicates the data direction.\r

-  @param  Data                  A pointer to the buffer of data that will be transmitted to USB\r
-                                device or received from USB device.                            \r

   @param  Timeout               Indicating the transfer should be completed within this time frame.\r
   @param  Timeout               Indicating the transfer should be completed within this time frame.\r

-                                The units are in milliseconds.                                       \r
+                                The units are in milliseconds.\r
+  @param  Data                  A pointer to the buffer of data that will be transmitted to USB\r
+                                device or received from USB device.\r

   @param  DataLength            The size, in bytes, of the data buffer specified by Data.\r
   @param  Status                A pointer to the result of the USB transfer.\r
   @param  DataLength            The size, in bytes, of the data buffer specified by Data.\r
   @param  Status                A pointer to the result of the USB transfer.\r

-                                \r
+\r

   @retval EFI_SUCCESS           The control transfer has been successfully executed.\r
   @retval EFI_DEVICE_ERROR      The transfer failed. The transfer status is returned in Status.\r
   @retval EFI_INVALID_PARAMETE  One or more parameters are invalid.\r
   @retval EFI_OUT_OF_RESOURCES  The request could not be completed due to a lack of resources.\r
   @retval EFI_TIMEOUT           The control transfer fails due to timeout.\r
   @retval EFI_SUCCESS           The control transfer has been successfully executed.\r
   @retval EFI_DEVICE_ERROR      The transfer failed. The transfer status is returned in Status.\r
   @retval EFI_INVALID_PARAMETE  One or more parameters are invalid.\r
   @retval EFI_OUT_OF_RESOURCES  The request could not be completed due to a lack of resources.\r
   @retval EFI_TIMEOUT           The control transfer fails due to timeout.\r

-                                   \r
+\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_CONTROL_TRANSFER) (\r
+(EFIAPI *EFI_USB_IO_CONTROL_TRANSFER)(\r

   IN EFI_USB_IO_PROTOCOL                        *This,\r
   IN EFI_USB_DEVICE_REQUEST                     *Request,\r
   IN EFI_USB_DATA_DIRECTION                     Direction,\r
   IN EFI_USB_IO_PROTOCOL                        *This,\r
   IN EFI_USB_DEVICE_REQUEST                     *Request,\r
   IN EFI_USB_DATA_DIRECTION                     Direction,\r


@@ -89,30 +129,40 @@ EFI_STATUS
   OUT UINT32                                    *Status\r
   );\r
 \r
   OUT UINT32                                    *Status\r
   );\r
 \r

-/**                                                                 \r
+/**\r

   This function is used to manage a USB device with the bulk transfer pipe. Bulk Transfers are\r
   typically used to transfer large amounts of data to/from USB devices.\r
   This function is used to manage a USB device with the bulk transfer pipe. Bulk Transfers are\r
   typically used to transfer large amounts of data to/from USB devices.\r

-    \r
-  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.                                \r
-  @param  DeviceEndpoint        A pointer to the USB device request that will be sent to the USB\r
-                                device.                                                         \r
+\r
+  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.\r
+  @param  DeviceEndpoint        The destination USB device endpoint to which the\r
+                                device request is being sent. DeviceEndpoint must\r
+                                be between 0x01 and 0x0F or between 0x81 and 0x8F,\r
+                                otherwise EFI_INVALID_PARAMETER is returned. If\r
+                                the endpoint is not a BULK endpoint, EFI_INVALID_PARAMETER\r
+                                is returned. The MSB of this parameter indicates\r
+                                the endpoint direction. The number "1" stands for\r
+                                an IN endpoint, and "0" stands for an OUT endpoint.\r

   @param  Data                  A pointer to the buffer of data that will be transmitted to USB\r
   @param  Data                  A pointer to the buffer of data that will be transmitted to USB\r

-                                device or received from USB device.                            \r
+                                device or received from USB device.\r

   @param  DataLength            The size, in bytes, of the data buffer specified by Data.\r
   @param  DataLength            The size, in bytes, of the data buffer specified by Data.\r

+                                On input, the size, in bytes, of the data buffer specified by Data.\r
+                                On output, the number of bytes that were actually transferred.\r

   @param  Timeout               Indicating the transfer should be completed within this time frame.\r
   @param  Timeout               Indicating the transfer should be completed within this time frame.\r

-                                The units are in milliseconds.                                           \r
+                                The units are in milliseconds. If Timeout is 0, then the\r
+                                caller must wait for the function to be completed until\r
+                                EFI_SUCCESS or EFI_DEVICE_ERROR is returned.\r

   @param  Status                This parameter indicates the USB transfer status.\r
   @param  Status                This parameter indicates the USB transfer status.\r

-                                \r
+\r

   @retval EFI_SUCCESS           The bulk transfer has been successfully executed.\r
   @retval EFI_DEVICE_ERROR      The transfer failed. The transfer status is returned in Status.\r
   @retval EFI_INVALID_PARAMETE  One or more parameters are invalid.\r
   @retval EFI_OUT_OF_RESOURCES  The request could not be submitted due to a lack of resources.\r
   @retval EFI_TIMEOUT           The control transfer fails due to timeout.\r
   @retval EFI_SUCCESS           The bulk transfer has been successfully executed.\r
   @retval EFI_DEVICE_ERROR      The transfer failed. The transfer status is returned in Status.\r
   @retval EFI_INVALID_PARAMETE  One or more parameters are invalid.\r
   @retval EFI_OUT_OF_RESOURCES  The request could not be submitted due to a lack of resources.\r
   @retval EFI_TIMEOUT           The control transfer fails due to timeout.\r

-                                   \r
+\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_BULK_TRANSFER) (\r
+(EFIAPI *EFI_USB_IO_BULK_TRANSFER)(\r

   IN EFI_USB_IO_PROTOCOL            *This,\r
   IN UINT8                          DeviceEndpoint,\r
   IN OUT VOID                       *Data,\r
   IN EFI_USB_IO_PROTOCOL            *This,\r
   IN UINT8                          DeviceEndpoint,\r
   IN OUT VOID                       *Data,\r


@@ -121,33 +171,43 @@ EFI_STATUS
   OUT UINT32                        *Status\r
   );\r
 \r
   OUT UINT32                        *Status\r
   );\r
 \r

-/**                                                                 \r
-  This function is used to manage a USB device with an interrupt transfer pipe. An Asynchronous   \r
-  Interrupt Transfer is typically used to query a device's status at a fixed rate. For example,  \r
+/**\r
+  This function is used to manage a USB device with an interrupt transfer pipe. An Asynchronous\r
+  Interrupt Transfer is typically used to query a device's status at a fixed rate. For example,\r

   keyboard, mouse, and hub devices use this type of transfer to query their interrupt endpoints at\r
   keyboard, mouse, and hub devices use this type of transfer to query their interrupt endpoints at\r

-  a fixed rate.                                                                                   \r
-    \r
-  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.                                \r
-  @param  DeviceEndpoint        A pointer to the USB device request that will be sent to the USB\r
-                                device.                                                         \r
-  @param  IsNewTransfer         If TRUE, a new transfer will be submitted to USB controller. If                             \r
+  a fixed rate.\r
+\r
+  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.\r
+  @param  DeviceEndpoint        The destination USB device endpoint to which the\r
+                                device request is being sent. DeviceEndpoint must\r
+                                be between 0x01 and 0x0F or between 0x81 and 0x8F,\r
+                                otherwise EFI_INVALID_PARAMETER is returned. If\r
+                                the endpoint is not a BULK endpoint, EFI_INVALID_PARAMETER\r
+                                is returned. The MSB of this parameter indicates\r
+                                the endpoint direction. The number "1" stands for\r
+                                an IN endpoint, and "0" stands for an OUT endpoint.\r
+  @param  IsNewTransfer         If TRUE, a new transfer will be submitted to USB controller. If\r

                                 FALSE, the interrupt transfer is deleted from the device's interrupt\r
                                 FALSE, the interrupt transfer is deleted from the device's interrupt\r

-                                transfer queue.                                                      \r
-  @param  PollingInterval       Indicates the periodic rate, in milliseconds, that the transfer is to be                        \r
-                                executed.                                                                 \r
+                                transfer queue.\r
+  @param  PollingInterval       Indicates the periodic rate, in milliseconds, that the transfer is to be\r
+                                executed.This parameter is required when IsNewTransfer is TRUE. The\r
+                                value must be between 1 to 255, otherwise EFI_INVALID_PARAMETER is returned.\r
+                                The units are in milliseconds.\r

   @param  DataLength            Specifies the length, in bytes, of the data to be received from the\r
   @param  DataLength            Specifies the length, in bytes, of the data to be received from the\r

-                                USB device.                                                        \r
-  @param  Context               Data passed to the InterruptCallback function.\r
+                                USB device. This parameter is only required when IsNewTransfer is TRUE.\r

   @param  InterruptCallback     The Callback function. This function is called if the asynchronous\r
   @param  InterruptCallback     The Callback function. This function is called if the asynchronous\r

-                                interrupt transfer is completed.\r
-                                \r
+                                interrupt transfer is completed. This parameter is required\r
+                                when IsNewTransfer is TRUE.\r
+  @param  Context               Data passed to the InterruptCallback function. This is an optional\r
+                                parameter and may be NULL.\r
+\r

   @retval EFI_SUCCESS           The asynchronous USB transfer request transfer has been successfully executed.\r
   @retval EFI_SUCCESS           The asynchronous USB transfer request transfer has been successfully executed.\r

-  @retval EFI_DEVICE_ERROR      The asynchronous USB transfer request failed.   \r
-                                   \r
+  @retval EFI_DEVICE_ERROR      The asynchronous USB transfer request failed.\r
+\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_ASYNC_INTERRUPT_TRANSFER) (\r
+(EFIAPI *EFI_USB_IO_ASYNC_INTERRUPT_TRANSFER)(\r

   IN EFI_USB_IO_PROTOCOL                                 *This,\r
   IN UINT8                                               DeviceEndpoint,\r
   IN BOOLEAN                                             IsNewTransfer,\r
   IN EFI_USB_IO_PROTOCOL                                 *This,\r
   IN UINT8                                               DeviceEndpoint,\r
   IN BOOLEAN                                             IsNewTransfer,\r


@@ -157,28 +217,37 @@ EFI_STATUS
   IN VOID                                                *Context OPTIONAL\r
   );\r
 \r
   IN VOID                                                *Context OPTIONAL\r
   );\r
 \r

-/**                                                                 \r
+/**\r

   This function is used to manage a USB device with an interrupt transfer pipe.\r
   This function is used to manage a USB device with an interrupt transfer pipe.\r

-    \r
-  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.                                \r
-  @param  DeviceEndpoint        A pointer to the USB device request that will be sent to the USB\r
-                                device.                                                         \r
+\r
+  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.\r
+  @param  DeviceEndpoint        The destination USB device endpoint to which the\r
+                                device request is being sent. DeviceEndpoint must\r
+                                be between 0x01 and 0x0F or between 0x81 and 0x8F,\r
+                                otherwise EFI_INVALID_PARAMETER is returned. If\r
+                                the endpoint is not a BULK endpoint, EFI_INVALID_PARAMETER\r
+                                is returned. The MSB of this parameter indicates\r
+                                the endpoint direction. The number "1" stands for\r
+                                an IN endpoint, and "0" stands for an OUT endpoint.\r

   @param  Data                  A pointer to the buffer of data that will be transmitted to USB\r
   @param  Data                  A pointer to the buffer of data that will be transmitted to USB\r

-                                device or received from USB device.                            \r
+                                device or received from USB device.\r

   @param  DataLength            On input, then size, in bytes, of the buffer Data. On output, the\r
   @param  DataLength            On input, then size, in bytes, of the buffer Data. On output, the\r

-                                amount of data actually transferred.                             \r
-  @param  Timeout               The time out, in seconds, for this transfer.\r
-  @param  Status                This parameter indicates the USB transfer status.                                \r
-                                \r
+                                amount of data actually transferred.\r
+  @param  Timeout               The time out, in seconds, for this transfer. If Timeout is 0,\r
+                                then the caller must wait for the function to be completed\r
+                                until EFI_SUCCESS or EFI_DEVICE_ERROR is returned. If the\r
+                                transfer is not completed in this time frame, then EFI_TIMEOUT is returned.\r
+  @param  Status                This parameter indicates the USB transfer status.\r
+\r

   @retval EFI_SUCCESS           The sync interrupt transfer has been successfully executed.\r
   @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r
   @retval EFI_SUCCESS           The sync interrupt transfer has been successfully executed.\r
   @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r

-  @retval EFI_DEVICE_ERROR      The sync interrupt transfer request failed.   \r
+  @retval EFI_DEVICE_ERROR      The sync interrupt transfer request failed.\r

   @retval EFI_OUT_OF_RESOURCES  The request could not be submitted due to a lack of resources.\r
   @retval EFI_OUT_OF_RESOURCES  The request could not be submitted due to a lack of resources.\r

-  @retval EFI_TIMEOUT           The transfer fails due to timeout.                                                       \r
+  @retval EFI_TIMEOUT           The transfer fails due to timeout.\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_SYNC_INTERRUPT_TRANSFER) (\r
+(EFIAPI *EFI_USB_IO_SYNC_INTERRUPT_TRANSFER)(\r

   IN EFI_USB_IO_PROTOCOL            *This,\r
   IN     UINT8                      DeviceEndpoint,\r
   IN OUT VOID                       *Data,\r
   IN EFI_USB_IO_PROTOCOL            *This,\r
   IN     UINT8                      DeviceEndpoint,\r
   IN OUT VOID                       *Data,\r


@@ -187,28 +256,34 @@ EFI_STATUS
   OUT    UINT32                     *Status\r
   );\r
 \r
   OUT    UINT32                     *Status\r
   );\r
 \r

-/**                                                                 \r
+/**\r

   This function is used to manage a USB device with an isochronous transfer pipe. An Isochronous\r
   transfer is typically used to transfer streaming data.\r
   This function is used to manage a USB device with an isochronous transfer pipe. An Isochronous\r
   transfer is typically used to transfer streaming data.\r

-    \r
-  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.                                \r
-  @param  DeviceEndpoint        A pointer to the USB device request that will be sent to the USB\r
-                                device.                                                         \r
+\r
+  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.\r
+  @param  DeviceEndpoint        The destination USB device endpoint to which the\r
+                                device request is being sent. DeviceEndpoint must\r
+                                be between 0x01 and 0x0F or between 0x81 and 0x8F,\r
+                                otherwise EFI_INVALID_PARAMETER is returned. If\r
+                                the endpoint is not a BULK endpoint, EFI_INVALID_PARAMETER\r
+                                is returned. The MSB of this parameter indicates\r
+                                the endpoint direction. The number "1" stands for\r
+                                an IN endpoint, and "0" stands for an OUT endpoint.\r

   @param  Data                  A pointer to the buffer of data that will be transmitted to USB\r
   @param  Data                  A pointer to the buffer of data that will be transmitted to USB\r

-                                device or received from USB device.                            \r
-  @param  DataLength            The size, in bytes, of the data buffer specified by Data.                                         \r
-  @param  Status                This parameter indicates the USB transfer status.                                \r
-                                \r
+                                device or received from USB device.\r
+  @param  DataLength            The size, in bytes, of the data buffer specified by Data.\r
+  @param  Status                This parameter indicates the USB transfer status.\r
+\r

   @retval EFI_SUCCESS           The isochronous transfer has been successfully executed.\r
   @retval EFI_INVALID_PARAMETER The parameter DeviceEndpoint is not valid.\r
   @retval EFI_DEVICE_ERROR      The transfer failed due to the reason other than timeout, The error status\r
   @retval EFI_SUCCESS           The isochronous transfer has been successfully executed.\r
   @retval EFI_INVALID_PARAMETER The parameter DeviceEndpoint is not valid.\r
   @retval EFI_DEVICE_ERROR      The transfer failed due to the reason other than timeout, The error status\r

-                                is returned in Status.                                                    \r
+                                is returned in Status.\r

   @retval EFI_OUT_OF_RESOURCES  The request could not be submitted due to a lack of resources.\r
   @retval EFI_OUT_OF_RESOURCES  The request could not be submitted due to a lack of resources.\r

-  @retval EFI_TIMEOUT           The transfer fails due to timeout.                                                       \r
+  @retval EFI_TIMEOUT           The transfer fails due to timeout.\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_ISOCHRONOUS_TRANSFER) (\r
+(EFIAPI *EFI_USB_IO_ISOCHRONOUS_TRANSFER)(\r

   IN EFI_USB_IO_PROTOCOL            *This,\r
   IN     UINT8                      DeviceEndpoint,\r
   IN OUT VOID                       *Data,\r
   IN EFI_USB_IO_PROTOCOL            *This,\r
   IN     UINT8                      DeviceEndpoint,\r
   IN OUT VOID                       *Data,\r


@@ -216,28 +291,36 @@ EFI_STATUS
   OUT    UINT32                     *Status\r
   );\r
 \r
   OUT    UINT32                     *Status\r
   );\r
 \r

-/**                                                                 \r
+/**\r

   This function is used to manage a USB device with an isochronous transfer pipe. An Isochronous\r
   This function is used to manage a USB device with an isochronous transfer pipe. An Isochronous\r

-  transfer is typically used to transfer streaming data.                                      \r
-    \r
-  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.                                \r
-  @param  DeviceEndpoint        A pointer to the USB device request that will be sent to the USB\r
-                                device.                                                         \r
+  transfer is typically used to transfer streaming data.\r
+\r
+  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.\r
+  @param  DeviceEndpoint        The destination USB device endpoint to which the\r
+                                device request is being sent. DeviceEndpoint must\r
+                                be between 0x01 and 0x0F or between 0x81 and 0x8F,\r
+                                otherwise EFI_INVALID_PARAMETER is returned. If\r
+                                the endpoint is not a BULK endpoint, EFI_INVALID_PARAMETER\r
+                                is returned. The MSB of this parameter indicates\r
+                                the endpoint direction. The number "1" stands for\r
+                                an IN endpoint, and "0" stands for an OUT endpoint.\r

   @param  Data                  A pointer to the buffer of data that will be transmitted to USB\r
   @param  Data                  A pointer to the buffer of data that will be transmitted to USB\r

-                                device or received from USB device.                            \r
-  @param  DataLength            The size, in bytes, of the data buffer specified by Data.                                         \r
+                                device or received from USB device.\r
+  @param  DataLength            The size, in bytes, of the data buffer specified by Data.\r
+                                This is an optional parameter and may be NULL.\r
+  @param  IsochronousCallback   The IsochronousCallback() function.This function is\r
+                                called if the requested isochronous transfer is completed.\r

   @param  Context               Data passed to the IsochronousCallback() function.\r
   @param  Context               Data passed to the IsochronousCallback() function.\r

-  @param  IsochronousCallback   The IsochronousCallback() function.\r
-                                \r
+\r

   @retval EFI_SUCCESS           The asynchronous isochronous transfer has been successfully submitted\r
                                 to the system.\r
   @retval EFI_INVALID_PARAMETER The parameter DeviceEndpoint is not valid.\r
   @retval EFI_OUT_OF_RESOURCES  The request could not be submitted due to a lack of resources.\r
   @retval EFI_SUCCESS           The asynchronous isochronous transfer has been successfully submitted\r
                                 to the system.\r
   @retval EFI_INVALID_PARAMETER The parameter DeviceEndpoint is not valid.\r
   @retval EFI_OUT_OF_RESOURCES  The request could not be submitted due to a lack of resources.\r

-                                           \r
+\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_ASYNC_ISOCHRONOUS_TRANSFER) (\r
+(EFIAPI *EFI_USB_IO_ASYNC_ISOCHRONOUS_TRANSFER)(\r

   IN EFI_USB_IO_PROTOCOL              *This,\r
   IN UINT8                            DeviceEndpoint,\r
   IN OUT VOID                         *Data,\r
   IN EFI_USB_IO_PROTOCOL              *This,\r
   IN UINT8                            DeviceEndpoint,\r
   IN OUT VOID                         *Data,\r


@@ -246,146 +329,157 @@ EFI_STATUS
   IN VOID                             *Context OPTIONAL\r
   );\r
 \r
   IN VOID                             *Context OPTIONAL\r
   );\r
 \r

-/**                                                                 \r
+/**\r

   Resets and reconfigures the USB controller. This function will work for all USB devices except\r
   Resets and reconfigures the USB controller. This function will work for all USB devices except\r

-  USB Hub Controllers.                                                                          \r
-    \r
-  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.                                  \r
-                                \r
-  @retval EFI_SUCCESS           The USB controller was reset.                                \r
+  USB Hub Controllers.\r
+\r
+  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.\r
+\r
+  @retval EFI_SUCCESS           The USB controller was reset.\r

   @retval EFI_INVALID_PARAMETER If the controller specified by This is a USB hub.\r
   @retval EFI_DEVICE_ERROR      An error occurred during the reconfiguration process.\r
   @retval EFI_INVALID_PARAMETER If the controller specified by This is a USB hub.\r
   @retval EFI_DEVICE_ERROR      An error occurred during the reconfiguration process.\r

-                                           \r
+\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_PORT_RESET) (\r
+(EFIAPI *EFI_USB_IO_PORT_RESET)(\r

   IN EFI_USB_IO_PROTOCOL    *This\r
   );\r
 \r
   IN EFI_USB_IO_PROTOCOL    *This\r
   );\r
 \r

-/**                                                                 \r
+/**\r

   Retrieves the USB Device Descriptor.\r
   Retrieves the USB Device Descriptor.\r

-    \r
-  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.                                  \r
+\r
+  @param  This                  A pointer to the EFI_USB_IO_PROTOCOL instance.\r

   @param  DeviceDescriptor      A pointer to the caller allocated USB Device Descriptor.\r
   @param  DeviceDescriptor      A pointer to the caller allocated USB Device Descriptor.\r

-                                \r
+\r

   @retval EFI_SUCCESS           The device descriptor was retrieved successfully.\r
   @retval EFI_INVALID_PARAMETER DeviceDescriptor is NULL.\r
   @retval EFI_NOT_FOUND         The device descriptor was not found. The device may not be configured.\r
   @retval EFI_SUCCESS           The device descriptor was retrieved successfully.\r
   @retval EFI_INVALID_PARAMETER DeviceDescriptor is NULL.\r
   @retval EFI_NOT_FOUND         The device descriptor was not found. The device may not be configured.\r

-                                           \r
+\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_GET_DEVICE_DESCRIPTOR) (\r
+(EFIAPI *EFI_USB_IO_GET_DEVICE_DESCRIPTOR)(\r

   IN EFI_USB_IO_PROTOCOL            *This,\r
   OUT EFI_USB_DEVICE_DESCRIPTOR     *DeviceDescriptor\r
   );\r
 \r
   IN EFI_USB_IO_PROTOCOL            *This,\r
   OUT EFI_USB_DEVICE_DESCRIPTOR     *DeviceDescriptor\r
   );\r
 \r

-/**                                                                 \r
+/**\r

   Retrieves the USB Device Descriptor.\r
   Retrieves the USB Device Descriptor.\r

-    \r
-  @param  This                    A pointer to the EFI_USB_IO_PROTOCOL instance.                                  \r
+\r
+  @param  This                    A pointer to the EFI_USB_IO_PROTOCOL instance.\r

   @param  ConfigurationDescriptor A pointer to the caller allocated USB Active Configuration\r
   @param  ConfigurationDescriptor A pointer to the caller allocated USB Active Configuration\r

-                                  Descriptor.                                               \r
+                                  Descriptor.\r

   @retval EFI_SUCCESS             The active configuration descriptor was retrieved successfully.\r
   @retval EFI_INVALID_PARAMETER   ConfigurationDescriptor is NULL.\r
   @retval EFI_NOT_FOUND           An active configuration descriptor cannot be found. The device may not\r
   @retval EFI_SUCCESS             The active configuration descriptor was retrieved successfully.\r
   @retval EFI_INVALID_PARAMETER   ConfigurationDescriptor is NULL.\r
   @retval EFI_NOT_FOUND           An active configuration descriptor cannot be found. The device may not\r

-                                  be configured.                                                        \r
-                                           \r
+                                  be configured.\r
+\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_GET_CONFIG_DESCRIPTOR) (\r
+(EFIAPI *EFI_USB_IO_GET_CONFIG_DESCRIPTOR)(\r

   IN EFI_USB_IO_PROTOCOL            *This,\r
   OUT EFI_USB_CONFIG_DESCRIPTOR     *ConfigurationDescriptor\r
   );\r
 \r
   IN EFI_USB_IO_PROTOCOL            *This,\r
   OUT EFI_USB_CONFIG_DESCRIPTOR     *ConfigurationDescriptor\r
   );\r
 \r

-/**                                                                 \r
+/**\r

   Retrieves the Interface Descriptor for a USB Device Controller. As stated earlier, an interface\r
   Retrieves the Interface Descriptor for a USB Device Controller. As stated earlier, an interface\r

-  within a USB device is equivalently to a USB Controller within the current configuration.      \r
-    \r
-  @param  This                    A pointer to the EFI_USB_IO_PROTOCOL instance.                                  \r
+  within a USB device is equivalently to a USB Controller within the current configuration.\r
+\r
+  @param  This                    A pointer to the EFI_USB_IO_PROTOCOL instance.\r

   @param  InterfaceDescriptor     A pointer to the caller allocated USB Interface Descriptor within\r
   @param  InterfaceDescriptor     A pointer to the caller allocated USB Interface Descriptor within\r

-                                  the configuration setting.                                       \r
+                                  the configuration setting.\r

   @retval EFI_SUCCESS             The interface descriptor retrieved successfully.\r
   @retval EFI_INVALID_PARAMETER   InterfaceDescriptor is NULL.\r
   @retval EFI_NOT_FOUND           The interface descriptor cannot be found. The device may not be\r
   @retval EFI_SUCCESS             The interface descriptor retrieved successfully.\r
   @retval EFI_INVALID_PARAMETER   InterfaceDescriptor is NULL.\r
   @retval EFI_NOT_FOUND           The interface descriptor cannot be found. The device may not be\r

-                                  correctly configured.                                          \r
-                                           \r
+                                  correctly configured.\r
+\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_GET_INTERFACE_DESCRIPTOR) (\r
+(EFIAPI *EFI_USB_IO_GET_INTERFACE_DESCRIPTOR)(\r

   IN EFI_USB_IO_PROTOCOL            *This,\r
   OUT EFI_USB_INTERFACE_DESCRIPTOR  *InterfaceDescriptor\r
   );\r
 \r
   IN EFI_USB_IO_PROTOCOL            *This,\r
   OUT EFI_USB_INTERFACE_DESCRIPTOR  *InterfaceDescriptor\r
   );\r
 \r

-/**                                                                 \r
+/**\r

   Retrieves an Endpoint Descriptor within a USB Controller.\r
   Retrieves an Endpoint Descriptor within a USB Controller.\r

-    \r
-  @param  This                    A pointer to the EFI_USB_IO_PROTOCOL instance.                                  \r
+\r
+  @param  This                    A pointer to the EFI_USB_IO_PROTOCOL instance.\r

   @param  EndpointIndex           Indicates which endpoint descriptor to retrieve.\r
   @param  EndpointDescriptor      A pointer to the caller allocated USB Endpoint Descriptor of\r
   @param  EndpointIndex           Indicates which endpoint descriptor to retrieve.\r
   @param  EndpointDescriptor      A pointer to the caller allocated USB Endpoint Descriptor of\r

-                                  a USB controller.                                           \r
-                                                    \r
+                                  a USB controller.\r
+\r

   @retval EFI_SUCCESS             The endpoint descriptor was retrieved successfully.\r
   @retval EFI_INVALID_PARAMETER   One or more parameters are invalid.\r
   @retval EFI_NOT_FOUND           The endpoint descriptor cannot be found. The device may not be\r
   @retval EFI_SUCCESS             The endpoint descriptor was retrieved successfully.\r
   @retval EFI_INVALID_PARAMETER   One or more parameters are invalid.\r
   @retval EFI_NOT_FOUND           The endpoint descriptor cannot be found. The device may not be\r

-                                  correctly configured.                                         \r
-                                           \r
+                                  correctly configured.\r
+\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_GET_ENDPOINT_DESCRIPTOR) (\r
+(EFIAPI *EFI_USB_IO_GET_ENDPOINT_DESCRIPTOR)(\r

   IN EFI_USB_IO_PROTOCOL            *This,\r
   IN  UINT8                         EndpointIndex,\r
   OUT EFI_USB_ENDPOINT_DESCRIPTOR   *EndpointDescriptor\r
   );\r
 \r
   IN EFI_USB_IO_PROTOCOL            *This,\r
   IN  UINT8                         EndpointIndex,\r
   OUT EFI_USB_ENDPOINT_DESCRIPTOR   *EndpointDescriptor\r
   );\r
 \r

-/**                                                                 \r
-  Retrieves a Unicode string stored in a USB Device.\r
-    \r
-  @param  This                    A pointer to the EFI_USB_IO_PROTOCOL instance.                                  \r
+/**\r
+  Retrieves a string stored in a USB Device.\r
+\r
+  @param  This                    A pointer to the EFI_USB_IO_PROTOCOL instance.\r

   @param  LangID                  The Language ID for the string being retrieved.\r
   @param  LangID                  The Language ID for the string being retrieved.\r

-  @param  StringID                The ID of the string being retrieved.                                                         \r
-  @param  String                  A pointer to a buffer allocated by this function with                \r
-                                  AllocatePool() to store the string.\r
-                                                    \r
-  @retval EFI_SUCCESS             The string was retrieved successfully.  \r
-  @retval EFI_NOT_FOUND           The string specified by LangID and StringID was not found.                                      \r
+  @param  StringID                The ID of the string being retrieved.\r
+  @param  String                  A pointer to a buffer allocated by this function with\r
+                                  AllocatePool() to store the string.If this function\r
+                                  returns EFI_SUCCESS, it stores the string the caller\r
+                                  wants to get. The caller should release the string\r
+                                  buffer with FreePool() after the string is not used any more.\r
+\r
+  @retval EFI_SUCCESS             The string was retrieved successfully.\r
+  @retval EFI_NOT_FOUND           The string specified by LangID and StringID was not found.\r

   @retval EFI_OUT_OF_RESOURCES    There are not enough resources to allocate the return buffer String.\r
   @retval EFI_OUT_OF_RESOURCES    There are not enough resources to allocate the return buffer String.\r

-                                           \r
+\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_GET_STRING_DESCRIPTOR) (\r
+(EFIAPI *EFI_USB_IO_GET_STRING_DESCRIPTOR)(\r

   IN EFI_USB_IO_PROTOCOL            *This,\r
   IN  UINT16                        LangID,\r
   IN  UINT8                         StringID,\r
   OUT CHAR16                        **String\r
   );\r
 \r
   IN EFI_USB_IO_PROTOCOL            *This,\r
   IN  UINT16                        LangID,\r
   IN  UINT8                         StringID,\r
   OUT CHAR16                        **String\r
   );\r
 \r

-/**                                                                 \r
+/**\r

   Retrieves all the language ID codes that the USB device supports.\r
   Retrieves all the language ID codes that the USB device supports.\r

-    \r
-  @param  This                    A pointer to the EFI_USB_IO_PROTOCOL instance.                                  \r
+\r
+  @param  This                    A pointer to the EFI_USB_IO_PROTOCOL instance.\r

   @param  LangIDTable             Language ID for the string the caller wants to get.\r
   @param  LangIDTable             Language ID for the string the caller wants to get.\r

+                                  This is a 16-bit ID defined by Microsoft. This\r
+                                  buffer pointer is allocated and maintained by\r
+                                  the USB Bus Driver, the caller should not modify\r
+                                  its contents.\r

   @param  TableSize               The size, in bytes, of the table LangIDTable.\r
   @param  TableSize               The size, in bytes, of the table LangIDTable.\r

-                                                    \r
-  @retval EFI_SUCCESS             The support languages were retrieved successfully.  \r
-                                           \r
+\r
+  @retval EFI_SUCCESS             The support languages were retrieved successfully.\r
+\r

 **/\r
 typedef\r
 EFI_STATUS\r
 **/\r
 typedef\r
 EFI_STATUS\r

-(EFIAPI *EFI_USB_IO_GET_SUPPORTED_LANGUAGE) (\r
+(EFIAPI *EFI_USB_IO_GET_SUPPORTED_LANGUAGE)(\r

   IN EFI_USB_IO_PROTOCOL            *This,\r
   OUT UINT16                        **LangIDTable,\r
   OUT UINT16                        *TableSize\r
   );\r
 \r
   IN EFI_USB_IO_PROTOCOL            *This,\r
   OUT UINT16                        **LangIDTable,\r
   OUT UINT16                        *TableSize\r
   );\r
 \r

-//\r
-//  Protocol Interface Structure\r
-//\r
+///\r
+/// The EFI_USB_IO_PROTOCOL provides four basic transfers types described\r
+/// in the USB 1.1 Specification. These include control transfer, interrupt\r
+/// transfer, bulk transfer and isochronous transfer. The EFI_USB_IO_PROTOCOL\r
+/// also provides some basic USB device/controller management and configuration\r
+/// interfaces. A USB device driver uses the services of this protocol to manage USB devices.\r
+///\r

 struct _EFI_USB_IO_PROTOCOL {\r
   //\r
   // IO transfer\r
 struct _EFI_USB_IO_PROTOCOL {\r
   //\r
   // IO transfer\r