alder_lake_bios/Lcfc/LfcPkg/Library/BaseLfcLib/BaseLfcLib.c

 /*****************************************************************************
 *
 *
 * Copyright (c) 2012 - 2015, Hefei LCFC Information Technology Co.Ltd. 
 * And/or its affiliates. All rights reserved. 
 * Hefei LCFC Information Technology Co.Ltd. PROPRIETARY/CONFIDENTIAL. 
 * Use is subject to license terms.
 * 
 *****************************************************************************/
/*
Data          Name          Version    Description
2014.12.28    dahai.zhou    v1.00      Initial release it for EDK2 projects
*/

#include <Library/IoLib.h>
#include <Library/PcdLib.h>
#include <Uefi.h>
#include <Lfc.h>
#include <Library/GpioLib.h>
//[-start-210513-KEBIN00001-modify]//
//#include "Register/PchRegsPcr.h"
#include "Register/PchPcrRegs.h"
//[-end-210513-KEBIN00001-modify]//
#include <Library/PchPcrLib.h>

#define PCH_PCR_BASE_ADDRESS            0xFD000000     ///< SBREG MMIO base address
#define ACPI_TIMER_ADDR       (PcdGet16(PcdPerfPkgAcpiIoPortBaseAddress) + 0x08)
#define ACPI_TIMER_MAX_VALUE  0x1000000

EFI_STATUS
EFIAPI
LfcLibLogError (
  IN  UINT8                        Data
  )
{
  UINT8                            ErrorCount;

  IoWrite8 (LFC_CMOS_INDEX, LFC_DEBUG_ERROR_COUNT_INDEX);
  ErrorCount = IoRead8 (LFC_CMOS_DATA);

  ErrorCount++;

  IoWrite8 (LFC_CMOS_INDEX, LFC_DEBUG_ERROR_COUNT_INDEX);
  IoWrite8 (LFC_CMOS_DATA, ErrorCount);

  if (ErrorCount > 3) {
    return EFI_SUCCESS;
  } else {
    IoWrite8 (LFC_CMOS_INDEX, LFC_DEBUG_ERROR1_INDEX + ErrorCount - 1);
    IoWrite8 (LFC_CMOS_DATA, Data);
    return EFI_SUCCESS;
  }
}

//[-start-210722-QINGLIN0002-modify]//
//[-start-210830-GEORGE0001-modify]//
//#ifndef S570_SUPPORT
#if !defined(S570_SUPPORT) && !defined(S77014_SUPPORT) && !defined(S77014IAH_SUPPORT)
//[-end-210830-GEORGE0001-modify]//
EFI_STATUS
EFIAPI
LfcProjectLibSetDGPUPowerEN (
  UINT8 Level
  )
{
  UINT32            Data32;
  // DGPU POEWR_EN GPP_C12 offset 0x6C0
  // Set Tx to level.

  Data32 = MmioRead32 (PCH_PCR_ADDRESS (PID_GPIOCOM4, 0x6C0));
  Data32 &= ~BIT0;
  Data32 |= Level & BIT0;
  
  MmioWrite32(PCH_PCR_ADDRESS (PID_GPIOCOM4, 0x6C0), Data32);
  
  return EFI_SUCCESS;
}

EFI_STATUS
EFIAPI
LfcProjectLibSetDGPUPowerRST (
  UINT8 Level
  )
{
  UINT32            Data32;
  // DGPU POEWR_RST GPP_C13 offset 0x6D0
  // Set Tx to level.

  Data32 = MmioRead32 (PCH_PCR_ADDRESS (PID_GPIOCOM4, 0x6D0));

  Data32 &= ~BIT0;
  Data32 |= Level & BIT0;
  
  MmioWrite32(PCH_PCR_ADDRESS (PID_GPIOCOM4, 0x6D0), Data32);

  return EFI_SUCCESS;
}

//
//disable Gpio's Tx, for power save and HW circuit.
//there have pull up by HW on PXS_PwrEn.
//
EFI_STATUS
EFIAPI
LfcProjectLibDisableGPUPwr (
  )
{
  UINT32            Data32;
  
  //disable PXS_PwrEn output
  Data32 = MmioRead32 (PCH_PCR_ADDRESS (PID_GPIOCOM4, 0x6C0));
  Data32 |= BIT8;
  MmioWrite32(PCH_PCR_ADDRESS (PID_GPIOCOM4, 0x6C0), Data32);

  return EFI_SUCCESS;
  
}

EFI_STATUS
EFIAPI
LfcProjectLibGetDGPUPowerGood (
  UINT8 *PowerGood
  )
{
  // DGPU POEWR_RST GPP_C14 offset 0x6E0
  // Get Rx to PowerGood.
  if(MmioRead32 (PCH_PCR_ADDRESS (PID_GPIOCOM4, 0x6E0)) & BIT1) {
  	// Power Good equ high
    *PowerGood = 1;
  }
  else {
  	// Power Good equ low
    *PowerGood = 0;
  }
  return EFI_SUCCESS;
}
#endif
//[-end-210722-QINGLIN0002-modify]//

/**

  Waits for at least the given number of microseconds.

  @param[in]  Microseconds   - Desired length of time to wait
  
  @retval   EFI_SUCCESS    - If the desired amount of time passed.
  @retval   !EFI_SUCCESS   - If error occurs while locating CpuIoPpi.

**/
EFI_STATUS
EFIAPI
LfcProjectLibStall (
  IN UINTN                                    Microseconds
  )
{
  UINT32                                      CurrentTick;
  UINT32                                      OriginalTick;
  UINT32                                      RemainingTick;
  UINTN                                       Counts;
  UINTN                                       Ticks;

  if (Microseconds == 0) {
    return EFI_SUCCESS;
  }

  OriginalTick  = IoRead32 (ACPI_TIMER_ADDR) & 0x00FFFFFF;

  CurrentTick   = OriginalTick;

  //
  // The timer frequency is 3.579545 MHz, so 1 ms corresponds 3.58 clocks
  //
  Ticks = Microseconds * 358 / 100 + OriginalTick + 1;
  //
  // The loops needed by timer overflow
  //
  Counts = Ticks / ACPI_TIMER_MAX_VALUE;
  //
  // remaining clocks within one loop
  //
  RemainingTick = Ticks % ACPI_TIMER_MAX_VALUE;
  //
  // not intend to use TMROF_STS bit of register PM1_STS, because this adds extra
  // one I/O operation, and maybe generate SMI
  //
  while (Counts != 0) {
    CurrentTick = IoRead32 (ACPI_TIMER_ADDR) & 0x00FFFFFF;

    if (CurrentTick <= OriginalTick) {
      Counts--;
    }

    OriginalTick = CurrentTick;
  }

  while ((RemainingTick > CurrentTick) && (OriginalTick <= CurrentTick)) {
    OriginalTick  = CurrentTick;
    CurrentTick   = (IoRead32 (ACPI_TIMER_ADDR) & 0x00FFFFFF);
  }

  return EFI_SUCCESS;
}