diff --git a/MdeModulePkg/Bus/Pci/EhciDxe/EhciDebug.c b/MdeModulePkg/Bus/Pci/EhciDxe/EhciDebug.c
index 76368b4748..71755d421b 100644
--- a/MdeModulePkg/Bus/Pci/EhciDxe/EhciDebug.c
+++ b/MdeModulePkg/Bus/Pci/EhciDxe/EhciDebug.c
@@ -228,31 +228,4 @@ EhcDumpBuf (
   DEBUG ((EFI_D_VERBOSE, "\n"));
 }
 
-/**
-  Dump the EHCI status registers.
 
-  @param  Ehc    USB EHCI Host Controller instance
-
-**/
-VOID
-EhcDumpRegs (
-  IN  USB2_HC_DEV         *Ehc
-  )
-{
-  UINT8   Index;
-
-  DEBUG ((EFI_D_VERBOSE, "  EHC_CAPLENGTH_OFFSET   = 0x%08x\n", EhcReadCapRegister (Ehc, EHC_CAPLENGTH_OFFSET)));
-  DEBUG ((EFI_D_VERBOSE, "  EHC_HCSPARAMS_OFFSET   = 0x%08x\n", EhcReadCapRegister (Ehc, EHC_HCSPARAMS_OFFSET)));
-  DEBUG ((EFI_D_VERBOSE, "  EHC_HCCPARAMS_OFFSET   = 0x%08x\n", EhcReadCapRegister (Ehc, EHC_HCCPARAMS_OFFSET)));
-  DEBUG ((EFI_D_VERBOSE, "  EHC_USBCMD_OFFSET      = 0x%08x\n", EhcReadOpReg (Ehc, EHC_USBCMD_OFFSET)));
-  DEBUG ((EFI_D_VERBOSE, "  EHC_USBSTS_OFFSET      = 0x%08x\n", EhcReadOpReg (Ehc, EHC_USBSTS_OFFSET)));
-  DEBUG ((EFI_D_VERBOSE, "  EHC_USBINTR_OFFSET     = 0x%08x\n", EhcReadOpReg (Ehc, EHC_USBINTR_OFFSET)));
-  DEBUG ((EFI_D_VERBOSE, "  EHC_FRINDEX_OFFSET     = 0x%08x\n", EhcReadOpReg (Ehc, EHC_FRINDEX_OFFSET)));
-  DEBUG ((EFI_D_VERBOSE, "  EHC_CTRLDSSEG_OFFSET   = 0x%08x\n", EhcReadOpReg (Ehc,  EHC_CTRLDSSEG_OFFSET)));
-  DEBUG ((EFI_D_VERBOSE, "  EHC_FRAME_BASE_OFFSET  = 0x%08x\n", EhcReadOpReg (Ehc,  EHC_FRAME_BASE_OFFSET)));
-  DEBUG ((EFI_D_VERBOSE, "  EHC_ASYNC_HEAD_OFFSET  = 0x%08x\n", EhcReadOpReg (Ehc, EHC_ASYNC_HEAD_OFFSET)));
-  DEBUG ((EFI_D_VERBOSE, "  EHC_CONFIG_FLAG_OFFSET = 0x%08x\n", EhcReadOpReg (Ehc, EHC_CONFIG_FLAG_OFFSET)));
-  for (Index = 0; Index < (UINT8) (Ehc->HcStructParams & HCSP_NPORTS); Index++) {
-    DEBUG ((EFI_D_VERBOSE, "  EHC_PORT_STAT_OFFSET(%d)  = 0x%08x\n", Index, EhcReadOpReg (Ehc, EHC_PORT_STAT_OFFSET + (4 * Index))));
-  }
-}
diff --git a/MdeModulePkg/Bus/Pci/EhciDxe/EhciDebug.h b/MdeModulePkg/Bus/Pci/EhciDxe/EhciDebug.h
index bc84bb7864..a64b0551a0 100644
--- a/MdeModulePkg/Bus/Pci/EhciDxe/EhciDebug.h
+++ b/MdeModulePkg/Bus/Pci/EhciDxe/EhciDebug.h
@@ -61,15 +61,4 @@ EhcDumpBuf (
   );
 
 
-/**
-  Dump the EHCI status registers.
-
-  @param  Ehc    USB EHCI Host Controller instance
-
-**/
-VOID
-EhcDumpRegs (
-  IN  USB2_HC_DEV         *Ehc
-  );
-
 #endif
diff --git a/MdeModulePkg/Bus/Pci/EhciDxe/EhciReg.c b/MdeModulePkg/Bus/Pci/EhciDxe/EhciReg.c
index 34836eccf5..59752d1bdc 100644
--- a/MdeModulePkg/Bus/Pci/EhciDxe/EhciReg.c
+++ b/MdeModulePkg/Bus/Pci/EhciDxe/EhciReg.c
@@ -372,29 +372,7 @@ EhcEnablePeriodSchd (
 }
 
 
-/**
-  Disable periodic schedule.
 
-  @param  Ehc               The EHCI device.
-  @param  Timeout           Time to wait before abort (in millisecond, ms).
-
-  @retval EFI_SUCCESS       Periodic schedule is disabled.
-  @retval EFI_DEVICE_ERROR  Fail to disable periodic schedule.
-
-**/
-EFI_STATUS
-EhcDisablePeriodSchd (
-  IN USB2_HC_DEV          *Ehc,
-  IN UINT32               Timeout
-  )
-{
-  EFI_STATUS              Status;
-
-  EhcClearOpRegBit (Ehc, EHC_USBCMD_OFFSET, USBCMD_ENABLE_PERIOD);
-
-  Status = EhcWaitOpRegBit (Ehc, EHC_USBSTS_OFFSET, USBSTS_PERIOD_ENABLED, FALSE, Timeout);
-  return Status;
-}
 
 
 
@@ -424,29 +402,7 @@ EhcEnableAsyncSchd (
 
 
 
-/**
-  Disable asynchrounous schedule.
 
-  @param  Ehc          The EHCI device.
-  @param  Timeout      Time to wait before abort (in millisecond, ms).
-
-  @retval EFI_SUCCESS  The asynchronous schedule is disabled.
-  @return Others       Failed to disable the asynchronous schedule.
-
-**/
-EFI_STATUS
-EhcDisableAsyncSchd (
-  IN USB2_HC_DEV          *Ehc,
-  IN UINT32               Timeout
-  )
-{
-  EFI_STATUS  Status;
-
-  EhcClearOpRegBit (Ehc, EHC_USBCMD_OFFSET, USBCMD_ENABLE_ASYNC);
-
-  Status = EhcWaitOpRegBit (Ehc, EHC_USBSTS_OFFSET, USBSTS_ASYNC_ENABLED, FALSE, Timeout);
-  return Status;
-}