audk/OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430I2c.h

/** @file
  I2c Bus byte read/write functions.

  Copyright (c) 2008 - 2009, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _CIRRUS_LOGIC_I2C_H_
#define _CIRRUS_LOGIC_I2C_H_

#include <Protocol/PciIo.h>

/**
  Read one byte data on I2C Bus.

  Read one byte data from the slave device connectet to I2C Bus.
  If Data is NULL, then ASSERT().

  @param  PciIo              The pointer to PCI_IO_PROTOCOL.
  @param  DeviceAddress      Slave device's address.
  @param  RegisterAddress    The register address on slave device.
  @param  Data               The pointer to returned data if EFI_SUCCESS returned.

  @retval EFI_DEVICE_ERROR
  @retval EFI_SUCCESS

**/
EFI_STATUS
EFIAPI
I2cReadByte (
  EFI_PCI_IO_PROTOCOL    *PciIo,
  UINT8                  DeviceAddress,
  UINT8                  RegisterAddress,
  UINT8                  *Data
  );

/**
  Write one byte data onto I2C Bus.

  Write one byte data to the slave device connectet to I2C Bus.
  If Data is NULL, then ASSERT().

  @param  PciIo              The pointer to PCI_IO_PROTOCOL.
  @param  DeviceAddress      Slave device's address.
  @param  RegisterAddress    The register address on slave device.
  @param  Data               The pointer to write data.

  @retval EFI_DEVICE_ERROR
  @retval EFI_SUCCESS

**/
EFI_STATUS
EFIAPI
I2cWriteByte (
  EFI_PCI_IO_PROTOCOL    *PciIo,
  UINT8                  DeviceAddress,
  UINT8                  RegisterAddress,
  UINT8                  *Data
  );

#endif