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diff --git a/Core/MdeModulePkg/Bus/Pci/EhciDxe/EhciDxe.inf b/Core/MdeModulePkg/Bus/Pci/EhciDxe/EhciDxe.inf
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+++ b/Core/MdeModulePkg/Bus/Pci/EhciDxe/EhciDxe.inf
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+## @file
+#  The EhciDxe driver is responsible for managing the behavior of EHCI controller.
+#  It implements the interfaces of monitoring the status of all ports and transferring 
+#  Control, Bulk, Interrupt and Isochronous requests to Usb2.0 device.
+#
+#  Note that EhciDxe driver is enhanced to guarantee that the EHCI controller get attached
+#  to the EHCI controller before the UHCI driver attaches to the companion UHCI controller. 
+#  This way avoids the control transfer on a shared port between EHCI and companion host
+#  controller when UHCI gets attached earlier than EHCI and a USB 2.0 device inserts.
+#
+#  Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
+#
+#  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.
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = EhciDxe
+  MODULE_UNI_FILE                = EhciDxe.uni
+  FILE_GUID                      = BDFE430E-8F2A-4db0-9991-6F856594777E
+  MODULE_TYPE                    = UEFI_DRIVER
+  VERSION_STRING                 = 1.0
+
+  ENTRY_POINT                    = EhcDriverEntryPoint
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC ARM AARCH64
+#
+#  DRIVER_BINDING                =  gEhciDriverBinding                        
+#  COMPONENT_NAME                =  gEhciComponentName
+#  COMPONENT_NAME2               =  gEhciComponentName2
+#
+
+[Sources]
+  UsbHcMem.h
+  EhciUrb.c
+  EhciReg.h
+  UsbHcMem.c
+  EhciSched.c
+  EhciDebug.c
+  EhciReg.c
+  EhciDebug.h
+  ComponentName.c
+  ComponentName.h
+  EhciUrb.h
+  Ehci.h
+  EhciSched.h
+  Ehci.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
+[FeaturePcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdTurnOffUsbLegacySupport  ## CONSUMES
+
+[LibraryClasses]
+  MemoryAllocationLib
+  BaseLib
+  UefiLib
+  UefiBootServicesTableLib
+  UefiDriverEntryPoint
+  BaseMemoryLib
+  DebugLib
+  PcdLib
+  ReportStatusCodeLib
+
+[Guids]
+  gEfiEventExitBootServicesGuid                 ## SOMETIMES_CONSUMES ## Event
+
+[Protocols]
+  gEfiPciIoProtocolGuid                         ## TO_START
+  gEfiUsb2HcProtocolGuid                        ## BY_START
+
+# [Event]
+# EVENT_TYPE_PERIODIC_TIMER       ## CONSUMES
+#
+
+[UserExtensions.TianoCore."ExtraFiles"]
+  EhciDxeExtra.uni