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/** @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
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