audk/Vlv2TbltDevicePkg/PlatformDxe/ClockControl.c

/** @file

  Copyright (c) 2004  - 2014, Intel Corporation. All rights reserved.<BR>
                                                                                   

  SPDX-License-Identifier: BSD-2-Clause-Patent

                                                                                   


Module Name:


  ClockControl.c

Abstract:

  Sets platform/SKU specific clock routing information.



--*/

#include "PlatformDxe.h"
#include <Protocol/CK505ClockPlatformInfo.h>

//
// Default clock routing informtion (All On)
//
EFI_CLOCK_PLATFORM_INFO mDefClockPolicy = {NULL, 0, NULL, 0, NULL, 0};

//
// Clock Settings
//
// Static clock table.
//  This should be used to define any clock settings that are static
//  (Always On or Always Off).  Dynamic clocks should be set to enabled
//  in this table.
//
EFI_STATIC_SIGNALS mAtxStaticClocks[] = {
  {SrcClk8,   Enabled,  All},
  {SrcClk7,   Enabled,  All},
  {SrcClk6,   Enabled,  All},
  {SrcClk5,   Enabled,  All},
  {SrcClk4,   Enabled,  All},
  {SrcClk3,   Enabled,  All},
  {SrcClk2,   Enabled,  All},
  {SrcClk1,   Enabled,  All},
  {SrcClk0,   Enabled,  All},
  {Ref0,      Enabled,  All},
  {Dot96,     Enabled,  All},
  {Usb48,     Enabled,  All},
  {PciClkF5,  Enabled,  All},
  {PciClk0,   Enabled,  All},
  {PciClk2,   Enabled,  All},
  {PciClk3,   Enabled,  All},
  {PciClk4,   Disabled,  All},
  {Cr_B,   EnabledWithSwitch,  All},
};

//
// ClockSxInfo Table
//  This is a list of clocks that need to be set to a known state when the
//  system enters S4 or S5.
//
EFI_STATIC_SIGNALS mAtxSxClocks[] = {
  {SaveClockConfiguration, Disabled, All}
};

//
// ATX settings structure
//
EFI_CLOCK_PLATFORM_INFO mAtxClockSettings = {
  mAtxStaticClocks,
  sizeof(mAtxStaticClocks) / sizeof(mAtxStaticClocks[0]),
  mAtxSxClocks,
  sizeof(mAtxSxClocks) / sizeof(mAtxSxClocks[0])
};

#if defined( RVP_SUPPORT ) && RVP_SUPPORT
//
// RVP Clock Settings
//
// Static clock table.
//  This should be used to define any clock settings that are static
//  (Always On or Always Off).  Dynamic clocks should be set to enabled
//  in this table.
//
//UPSD_TBD Check with Jan if any porting required.
//
EFI_STATIC_SIGNALS mRvpStaticClocks[] = {
  {SrcClk11,  Enabled,  All},     // Not used/not present but leave coding enabled
  {SrcClk10,  Enabled,  All},     // Not used/not present but leave coding enabled
  {SrcClk9,   Enabled,  All},     // Not used/not present but leave coding enabled
  {SrcClk8,   Enabled,  All},     // ICHSATAII
  {SrcClk7,   Enabled,  All},     // DPL_REFSSCLKIN
  {SrcClk6,   Enabled,  All},     // 100M_MCH
  {SrcClk5,   Enabled,  All},     // Mini-PCIe  //TODO PNV: Need to check ICH GPIO38:
                                                // 0: turn on; 1: turn off
  {SrcClk4,   Enabled,  All},     // ICHSATA
  {SrcClk3,   Enabled,  All},     // 100M_ICH
  {SrcClk2,   Enabled,  All},     // 100M_LAN
  {SrcClk1,   Enabled,  All},     // 25M_LAN
  {SrcClk0,   Enabled,  All},     // 96M_DREF
  {Ref0,      Enabled,  All},
  {Dot96,     Enabled,  All},
  {Usb48,     Enabled,  All},
  {PciClkF5,  Enabled,  All},     // 33M_ICH
  {PciClk0,   Enabled,  All},     // 33M_RISER
  {PciClk1,   Enabled,  All},     // 33M_RISER
  {PciClk2,   Enabled,  All},     // VDD_Clock
  {PciClk3,   Enabled,  All},     // 33M_S1
  {PciClk4,   Enabled,  All},     // 33M_PA
};

//
// Dynamic clock table
// This is used to determine if a clock should be left on or turned off based
// on the presence of a device.  The bridge information is used so the bus
// number for the device to be detected can be found.
//

//
// ClockSxInfo Table
// This is a list of clocks that need to be set to a known state when the
// system enters S4 or S5.
//
EFI_STATIC_SIGNALS mRvpSxClocks[] = {
  {SaveClockConfiguration, Disabled, All}
};

//
// RVP settings structure
//
EFI_CLOCK_PLATFORM_INFO mRvpClockSettings = {
  mRvpStaticClocks,
  sizeof(mRvpStaticClocks) / sizeof(mRvpStaticClocks[0]),
  0,  // No clocks will be turned off mRvpDynamicClocks,
  0, // No clocks will be turned off sizeof(mRvpDynamicClocks) / sizeof(mRvpDynamicClocks[0]),
  mRvpSxClocks,
  sizeof(mRvpSxClocks) / sizeof(mRvpSxClocks[0])
};
#endif

VOID
InitializeClockRouting(
  )
{
  EFI_STATUS                      Status;
  UINTN                           BoardIdVarSize;
  EFI_BOARD_FEATURES              BoardIdVar;
  EFI_CLOCK_PLATFORM_INFO         *ClockPolicy;
  EFI_HANDLE                      Handle;

  ClockPolicy = &mDefClockPolicy;

  //
  // Do modifications based on board type
  //
  BoardIdVarSize = sizeof (EFI_BOARD_FEATURES);
  Status = gRT->GetVariable (
                  BOARD_FEATURES_NAME,
                  &gEfiBoardFeaturesGuid,
                  NULL,
                  &BoardIdVarSize,
                  &BoardIdVar
                  );
  if (!EFI_ERROR (Status)) {

#if defined( RVP_SUPPORT ) && RVP_SUPPORT
    if (BoardIdVar & B_BOARD_FEATURES_RVP) {
      ClockPolicy = &mRvpClockSettings;
    }
#else

    //
    // Isolate board type information
    //
    BoardIdVar = BoardIdVar & (B_BOARD_FEATURES_FORM_FACTOR_ATX |
                               B_BOARD_FEATURES_FORM_FACTOR_BTX |
                               B_BOARD_FEATURES_FORM_FACTOR_MICRO_ATX |
                               B_BOARD_FEATURES_FORM_FACTOR_MICRO_BTX);

    if (BoardIdVar == B_BOARD_FEATURES_FORM_FACTOR_ATX ||
        BoardIdVar == B_BOARD_FEATURES_FORM_FACTOR_MICRO_ATX) {
      ClockPolicy = &mAtxClockSettings;
    }

#endif

  }

  Handle = NULL;
  Status = gBS->InstallProtocolInterface (
                  &Handle,
                  &gEfiCk505ClockPlatformInfoGuid,
                  EFI_NATIVE_INTERFACE,
                  ClockPolicy
                  );
  ASSERT_EFI_ERROR(Status);

}