audk/QuarkSocPkg/QuarkSouthCluster/Library/IohLib/IohLib.c

/** @file
Lib function for Pei Quark South Cluster.

Copyright (c) 2013-2016 Intel Corporation.

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

**/
#include "CommonHeader.h"

/**
  Program SVID/SID the same as VID/DID*
**/
EFI_STATUS
EFIAPI
InitializeIohSsvidSsid (
   IN UINT8   Bus,
   IN UINT8   Device,
   IN UINT8   Func
   )
{
  UINTN       Index;

  for (Index = 0; Index <= IOH_PCI_IOSF2AHB_0_MAX_FUNCS; Index++) {
    if (((Device == IOH_PCI_IOSF2AHB_1_DEV_NUM) && (Index >= IOH_PCI_IOSF2AHB_1_MAX_FUNCS))) {
      continue;
    }

    IohMmPci32(0, Bus, Device, Index, PCI_REG_SVID0) = IohMmPci32(0, Bus, Device, Index, PCI_REG_VID);
  }

  return EFI_SUCCESS;
}

/* Enable memory, io, and bus master for USB controller */
VOID
EFIAPI
EnableUsbMemIoBusMaster (
  IN UINT8   UsbBusNumber
  )
{
  UINT16 CmdReg;

  CmdReg = PciRead16 (PCI_LIB_ADDRESS (UsbBusNumber, IOH_USB_OHCI_DEVICE_NUMBER, IOH_OHCI_FUNCTION_NUMBER, PCI_REG_PCICMD));
  CmdReg = (UINT16) (CmdReg | EFI_PCI_COMMAND_MEMORY_SPACE | EFI_PCI_COMMAND_IO_SPACE | EFI_PCI_COMMAND_BUS_MASTER);
  PciWrite16 (PCI_LIB_ADDRESS (UsbBusNumber, IOH_USB_OHCI_DEVICE_NUMBER, IOH_OHCI_FUNCTION_NUMBER, PCI_REG_PCICMD), CmdReg);

  CmdReg = PciRead16 (PCI_LIB_ADDRESS (UsbBusNumber, IOH_USB_EHCI_DEVICE_NUMBER, IOH_EHCI_FUNCTION_NUMBER, PCI_REG_PCICMD));
  CmdReg = (UINT16) (CmdReg | EFI_PCI_COMMAND_MEMORY_SPACE | EFI_PCI_COMMAND_IO_SPACE | EFI_PCI_COMMAND_BUS_MASTER);
  PciWrite16 (PCI_LIB_ADDRESS (UsbBusNumber, IOH_USB_EHCI_DEVICE_NUMBER, IOH_EHCI_FUNCTION_NUMBER, PCI_REG_PCICMD), CmdReg);
}

/**
  Read south cluster GPIO input from Port A.

**/
UINT32
EFIAPI
ReadIohGpioValues (
  VOID
  )
{
  UINT32  GipData;
  UINT32  GipAddr;
  UINT32  TempBarAddr;
  UINT16  SaveCmdReg;
  UINT32  SaveBarReg;

  TempBarAddr = (UINT32) PcdGet64(PcdIohGpioMmioBase);

  GipAddr = PCI_LIB_ADDRESS(
      PcdGet8 (PcdIohGpioBusNumber),
      PcdGet8 (PcdIohGpioDevNumber),
      PcdGet8 (PcdIohGpioFunctionNumber), 0);

  //
  // Save current settings for PCI CMD/BAR registers.
  //
  SaveCmdReg = PciRead16 (GipAddr + PCI_COMMAND_OFFSET);
  SaveBarReg = PciRead32 (GipAddr + PcdGet8 (PcdIohGpioBarRegister));

  DEBUG ((EFI_D_INFO, "SC GPIO temporary enable  at %08X\n", TempBarAddr));

  // Use predefined temporary memory resource.
  PciWrite32 ( GipAddr + PcdGet8 (PcdIohGpioBarRegister), TempBarAddr);
  PciWrite8 ( GipAddr + PCI_COMMAND_OFFSET, EFI_PCI_COMMAND_MEMORY_SPACE);

  // Read GPIO configuration
  GipData = MmioRead32(TempBarAddr + GPIO_EXT_PORTA);

  //
  // Restore settings for PCI CMD/BAR registers.
  //
  PciWrite32 ((GipAddr + PcdGet8 (PcdIohGpioBarRegister)), SaveBarReg);
  PciWrite16 (GipAddr + PCI_COMMAND_OFFSET, SaveCmdReg);

  // Only 8 bits valid.
  return GipData & 0x000000FF;
}