diff --git a/MdePkg/Include/Protocol/SmmUsbDispatch2.h b/MdePkg/Include/Protocol/SmmUsbDispatch2.h
new file mode 100644
index 0000000000..a95f8f63b6
--- /dev/null
+++ b/MdePkg/Include/Protocol/SmmUsbDispatch2.h
@@ -0,0 +1,130 @@
+/** @file
+  SMM USB Dispatch2 Protocol as defined in PI 1.1 Specification
+  Volume 4 System Management Mode Core Interface.
+
+  Provides the parent dispatch service for the USB SMI source generator.
+
+  Copyright (c) 2009, Intel Corporation
+  All rights reserved. This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+  @par Revision Reference:
+  This protocol is from PI Version 1.1.
+
+**/
+
+#ifndef _SMM_USB_DISPATCH2_H_
+#define _SMM_USB_DISPATCH2_H_
+
+#include <Pi/PiSmmCis.h>
+
+#define EFI_SMM_USB_DISPATCH2_PROTOCOL_GUID \
+  { \
+    0xee9b8d90, 0xc5a6, 0x40a2, {0xbd, 0xe2, 0x52, 0x55, 0x8d, 0x33, 0xcc, 0xa1 } \
+  }
+
+///
+/// USB SMI event types
+///
+typedef enum {
+  UsbLegacy,
+  UsbWake
+} EFI_USB_SMI_TYPE;
+
+///
+/// The dispatch function's context.
+///
+typedef struct {
+  ///
+  /// Describes whether this child handler will be invoked in response to a USB legacy 
+  /// emulation event, such as port-trap on the PS/2* keyboard control registers, or to a 
+  /// USB wake event, such as resumption from a sleep state.
+  ///
+  EFI_USB_SMI_TYPE          Type;
+  ///
+  /// The device path is part of the context structure and describes the location of the 
+  /// particular USB host controller in the system for which this register event will occur.
+  /// This location is important because of the possible integration of several USB host 
+  /// controllers in a system.
+  ///
+  EFI_DEVICE_PATH_PROTOCOL  *Device;
+} EFI_SMM_USB_REGISTER_CONTEXT;
+
+typedef struct _EFI_SMM_USB_DISPATCH2_PROTOCOL EFI_SMM_USB_DISPATCH2_PROTOCOL;
+
+/**
+  Provides the parent dispatch service for the USB SMI source generator.
+
+  This service registers a function (DispatchFunction) which will be called when the USB-
+  related SMI specified by RegisterContext has occurred. On return, DispatchHandle 
+  contains a unique handle which may be used later to unregister the function using UnRegister().
+  The DispatchFunction will be called with Context set to the same value as was passed into 
+  this function in RegisterContext and with CommBuffer containing NULL and 
+  CommBufferSize containing zero.
+
+  @param[in]  This               Pointer to the EFI_SMM_USB_DISPATCH2_PROTOCOL instance.
+  @param[in]  DispatchFunction   Function to register for handler when a USB-related SMI occurs. 
+  @param[in]  RegisterContext    Pointer to the dispatch function's context.
+                                 The caller fills this context in before calling
+                                 the register function to indicate to the register
+                                 function the USB SMI types for which the dispatch
+                                 function should be invoked.
+  @param[out] DispatchHandle     Handle generated by the dispatcher to track the function instance.
+
+  @retval EFI_SUCCESS            The dispatch function has been successfully
+                                 registered and the SMI source has been enabled.
+  @retval EFI_DEVICE_ERROR       The driver was unable to enable the SMI source.
+  @retval EFI_INVALID_PARAMETER  RegisterContext is invalid. The USB SMI type
+                                 is not within valid range.
+  @retval EFI_OUT_OF_RESOURCES   There is not enough memory (system or SMM) to manage this child.
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SMM_USB_REGISTER)(
+  IN  CONST EFI_SMM_USB_DISPATCH2_PROTOCOL  *This,
+  IN        EFI_SMM_HANDLER_ENTRY_POINT2    DispatchFunction,
+  IN  CONST EFI_SMM_USB_REGISTER_CONTEXT    *RegisterContext,
+  OUT       EFI_HANDLE                      *DispatchHandle
+  );
+
+/**
+  Unregisters a USB service.
+
+  This service removes the handler associated with DispatchHandle so that it will no longer be 
+  called when the USB event occurs.
+
+  @param[in]  This               Pointer to the EFI_SMM_USB_DISPATCH2_PROTOCOL instance.
+  @param[in]  DispatchHandle     Handle of the service to remove. 
+
+  @retval EFI_SUCCESS            The dispatch function has been successfully
+                                 unregistered and the SMI source has been disabled
+                                 if there are no other registered child dispatch
+                                 functions for this SMI source.
+  @retval EFI_INVALID_PARAMETER  The DispatchHandle was not valid.
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SMM_USB_UNREGISTER)(
+  IN CONST EFI_SMM_USB_DISPATCH2_PROTOCOL  *This,
+  IN       EFI_HANDLE                      DispatchHandle
+  );
+
+///
+/// Interface structure for the SMM USB SMI Dispatch2 Protocol
+///
+/// This protocol provides the parent dispatch service for the USB SMI source generator.
+///
+struct _EFI_SMM_USB_DISPATCH2_PROTOCOL {
+  EFI_SMM_USB_REGISTER    Register;
+  EFI_SMM_USB_UNREGISTER  UnRegister;
+};
+
+extern EFI_GUID gEfiSmmUsbDispatch2ProtocolGuid;
+
+#endif
+
diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
index e60efb92b7..a36e9766d3 100644
--- a/MdePkg/MdePkg.dec
+++ b/MdePkg/MdePkg.dec
@@ -644,6 +644,9 @@
   ## Include/Protocol/SmmPeriodicTimerDispatch2.h
   gEfiSmmPeriodicTimerDispatch2ProtocolGuid = { 0x4cec368e, 0x8e8e, 0x4d71, {0x8b, 0xe1, 0x95, 0x8c, 0x45, 0xfc, 0x8a, 0x53 }}
 
+  ## Include/Protocol/SmmUsbDispatch2.h
+  gEfiSmmUsbDispatch2ProtocolGuid = { 0xee9b8d90, 0xc5a6, 0x40a2, {0xbd, 0xe2, 0x52, 0x55, 0x8d, 0x33, 0xcc, 0xa1 }}
+
   #
   # Protocols defined in UEFI2.1/UEFI2.0/EFI1.1
   #