Omap35xxPkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / Omap35xxPkg / Gpio / Gpio.c

/** @file\r
\r
  Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Uefi.h>\r
\r
#include <Library/IoLib.h>\r
#include <Library/OmapLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
\r
#include <Protocol/EmbeddedGpio.h>\r
\r
#include <Omap3530/Omap3530.h>\r
\r
EFI_STATUS\r
Get (\r
  IN  EMBEDDED_GPIO     *This,\r
  IN  EMBEDDED_GPIO_PIN Gpio,\r
  OUT UINTN               *Value\r
  )\r
{\r
  UINTN  Port;\r
  UINTN  Pin;\r
  UINT32 DataInRegister;\r
\r
  if (Value == NULL)\r
  {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  Port    = GPIO_PORT(Gpio);\r
  Pin     = GPIO_PIN(Gpio);\r
\r
  DataInRegister = GpioBase(Port) + GPIO_DATAIN;\r
\r
  if (MmioRead32 (DataInRegister) & GPIO_DATAIN_MASK(Pin)) {\r
    *Value = 1;\r
  } else {\r
    *Value = 0;\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
Set (\r
  IN  EMBEDDED_GPIO       *This,\r
  IN  EMBEDDED_GPIO_PIN   Gpio,\r
  IN  EMBEDDED_GPIO_MODE  Mode\r
  )\r
{\r
  UINTN  Port;\r
  UINTN  Pin;\r
  UINT32 OutputEnableRegister;\r
  UINT32 SetDataOutRegister;\r
  UINT32 ClearDataOutRegister;\r
\r
  Port    = GPIO_PORT(Gpio);\r
  Pin     = GPIO_PIN(Gpio);\r
\r
  OutputEnableRegister = GpioBase(Port) + GPIO_OE;\r
  SetDataOutRegister   = GpioBase(Port) + GPIO_SETDATAOUT;\r
  ClearDataOutRegister = GpioBase(Port) + GPIO_CLEARDATAOUT;\r
\r
  switch (Mode)\r
  {\r
    case GPIO_MODE_INPUT:\r
      MmioAndThenOr32(OutputEnableRegister, ~GPIO_OE_MASK(Pin), GPIO_OE_INPUT(Pin));\r
      break;\r
\r
    case GPIO_MODE_OUTPUT_0:\r
      MmioWrite32 (ClearDataOutRegister, GPIO_CLEARDATAOUT_BIT(Pin));\r
      MmioAndThenOr32(OutputEnableRegister, ~GPIO_OE_MASK(Pin), GPIO_OE_OUTPUT(Pin));\r
      break;\r
\r
    case GPIO_MODE_OUTPUT_1:\r
      MmioWrite32 (SetDataOutRegister, GPIO_SETDATAOUT_BIT(Pin));\r
      MmioAndThenOr32(OutputEnableRegister, ~GPIO_OE_MASK(Pin), GPIO_OE_OUTPUT(Pin));\r
      break;\r
\r
    default:\r
      return EFI_UNSUPPORTED;\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
GetMode (\r
  IN  EMBEDDED_GPIO       *This,\r
  IN  EMBEDDED_GPIO_PIN   Gpio,\r
  OUT EMBEDDED_GPIO_MODE  *Mode\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
EFI_STATUS\r
SetPull (\r
  IN  EMBEDDED_GPIO       *This,\r
  IN  EMBEDDED_GPIO_PIN   Gpio,\r
  IN  EMBEDDED_GPIO_PULL  Direction\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
EMBEDDED_GPIO Gpio = {\r
  Get,\r
  Set,\r
  GetMode,\r
  SetPull\r
};\r
\r
EFI_STATUS\r
GpioInitialize (\r
  IN EFI_HANDLE         ImageHandle,\r
  IN EFI_SYSTEM_TABLE   *SystemTable\r
  )\r
{\r
  EFI_STATUS  Status;\r
\r
  Status = gBS->InstallMultipleProtocolInterfaces(&ImageHandle, &gEmbeddedGpioProtocolGuid, &Gpio, NULL);\r
  return Status;\r
}\r