CorebootPayloadPkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / CorebootPayloadPkg / Library / PlatformHookLib / PlatformHookLib.c

/** @file\r
  Platform Hook Library instance for UART device upon coreboot.\r
\r
  Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Base.h>\r
#include <Uefi/UefiBaseType.h>\r
#include <Library/PciLib.h>\r
#include <Library/PlatformHookLib.h>\r
#include <Library/CbParseLib.h>\r
#include <Library/PcdLib.h>\r
\r
typedef struct {\r
  UINT16  VendorId;          ///< Vendor ID to match the PCI device.  The value 0xFFFF terminates the list of entries.\r
  UINT16  DeviceId;          ///< Device ID to match the PCI device\r
  UINT32  ClockRate;         ///< UART clock rate.  Set to 0 for default clock rate of 1843200 Hz\r
  UINT64  Offset;            ///< The byte offset into to the BAR\r
  UINT8   BarIndex;          ///< Which BAR to get the UART base address\r
  UINT8   RegisterStride;    ///< UART register stride in bytes.  Set to 0 for default register stride of 1 byte.\r
  UINT16  ReceiveFifoDepth;  ///< UART receive FIFO depth in bytes. Set to 0 for a default FIFO depth of 16 bytes.\r
  UINT16  TransmitFifoDepth; ///< UART transmit FIFO depth in bytes. Set to 0 for a default FIFO depth of 16 bytes.\r
  UINT8   Reserved[2];\r
} PCI_SERIAL_PARAMETER;\r
\r
/**\r
  Performs platform specific initialization required for the CPU to access\r
  the hardware associated with a SerialPortLib instance.  This function does\r
  not initialize the serial port hardware itself.  Instead, it initializes\r
  hardware devices that are required for the CPU to access the serial port\r
  hardware.  This function may be called more than once.\r
\r
  @retval RETURN_SUCCESS       The platform specific initialization succeeded.\r
  @retval RETURN_DEVICE_ERROR  The platform specific initialization could not be completed.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
PlatformHookSerialPortInitialize (\r
  VOID\r
  )\r
{\r
  RETURN_STATUS     Status;\r
  UINT32            SerialRegBase;\r
  UINT32            SerialRegAccessType;\r
  UINT32            BaudRate;\r
  UINT32            RegWidth;\r
  UINT32            InputHertz;\r
  UINT32            PayloadParam;\r
  UINT32            DeviceVendor;\r
  PCI_SERIAL_PARAMETER *SerialParam;\r
\r
  Status = CbParseSerialInfo (&SerialRegBase, &SerialRegAccessType,\r
                              &RegWidth, &BaudRate, &InputHertz,\r
                              &PayloadParam);\r
  if (RETURN_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  if (SerialRegAccessType == 2) { //MMIO\r
    Status = PcdSetBoolS (PcdSerialUseMmio, TRUE);\r
  } else { //IO\r
    Status = PcdSetBoolS (PcdSerialUseMmio, FALSE);\r
  }\r
  if (RETURN_ERROR (Status)) {\r
    return Status;\r
  }\r
  Status = PcdSet64S (PcdSerialRegisterBase, (UINT64) SerialRegBase);\r
  if (RETURN_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  Status = PcdSet32S (PcdSerialRegisterStride, RegWidth);\r
  if (RETURN_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  Status = PcdSet32S (PcdSerialBaudRate, BaudRate);\r
  if (RETURN_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  Status = PcdSet64S (PcdUartDefaultBaudRate, BaudRate);\r
  if (RETURN_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  Status = PcdSet32S (PcdSerialClockRate, InputHertz);\r
  if (RETURN_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  if (PayloadParam >= 0x80000000) {\r
    DeviceVendor = PciRead32 (PayloadParam & 0x0ffff000);\r
    SerialParam = PcdGetPtr(PcdPciSerialParameters);\r
    SerialParam->VendorId = (UINT16)DeviceVendor;\r
    SerialParam->DeviceId = DeviceVendor >> 16;\r
    SerialParam->ClockRate = InputHertz;\r
    SerialParam->RegisterStride = (UINT8)RegWidth;\r
  }\r
\r
  return RETURN_SUCCESS;\r
}\r