mirror of https://github.com/acidanthera/audk.git
153 lines
5.2 KiB
C
153 lines
5.2 KiB
C
/** @file
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Intel I2C library implementation built upon I/O library
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Copyright (c) 2013-2015 Intel Corporation.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _I2C_LIB_H_
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#define _I2C_LIB_H_
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#include "I2cRegs.h"
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/**
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The I2cWriteByte() function is a wrapper function for the WriteByte() function.
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Provides a standard way to execute a standard single byte write to an IC2 device
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(without accessing sub-addresses), as defined in the I2C Specification.
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@param SlaveAddress The I2C slave address of the device
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with which to communicate.
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@param AddrMode I2C Addressing Mode: 7-bit or 10-bit address.
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@param Buffer Contains the value of byte data to execute to the
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I2C slave device.
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@retval EFI_SUCCESS Transfer success.
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@retval EFI_INVALID_PARAMETER This or Buffer pointers are invalid.
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@retval EFI_TIMEOUT Timeout while waiting xfer.
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@retval EFI_ABORTED Controller aborted xfer.
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@retval EFI_DEVICE_ERROR Device error detected by controller.
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**/
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EFI_STATUS
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EFIAPI
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I2cWriteByte (
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IN EFI_I2C_DEVICE_ADDRESS SlaveAddress,
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IN EFI_I2C_ADDR_MODE AddrMode,
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IN OUT VOID *Buffer
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);
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/**
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The I2cReadByte() function is a wrapper function for the ReadByte() function.
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Provides a standard way to execute a standard single byte read to an I2C device
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(without accessing sub-addresses), as defined in the I2C Specification.
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@param SlaveAddress The I2C slave address of the device
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with which to communicate.
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@param AddrMode I2C Addressing Mode: 7-bit or 10-bit address.
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@param Buffer Contains the value of byte data read from the
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I2C slave device.
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@retval EFI_SUCCESS Transfer success.
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@retval EFI_INVALID_PARAMETER This or Buffer pointers are invalid.
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@retval EFI_TIMEOUT Timeout while waiting xfer.
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@retval EFI_ABORTED Controller aborted xfer.
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@retval EFI_DEVICE_ERROR Device error detected by controller.
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**/
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EFI_STATUS
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EFIAPI
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I2cReadByte (
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IN EFI_I2C_DEVICE_ADDRESS SlaveAddress,
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IN EFI_I2C_ADDR_MODE AddrMode,
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IN OUT VOID *Buffer
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);
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/**
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The I2cWriteMultipleByte() function is a wrapper function for the WriteMultipleByte()
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function. Provides a standard way to execute multiple byte writes to an I2C device (e.g. when
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accessing sub-addresses or writing block of data), as defined in the I2C Specification.
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@param SlaveAddress The I2C slave address of the device
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with which to communicate.
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@param AddrMode I2C Addressing Mode: 7-bit or 10-bit address.
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@param Length No. of bytes to be written.
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@param Buffer Contains the value of byte to be written to the
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I2C slave device.
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@retval EFI_SUCCESS Transfer success.
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@retval EFI_INVALID_PARAMETER This, Length or Buffer pointers are invalid.
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@retval EFI_UNSUPPORTED Unsupported input param.
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@retval EFI_TIMEOUT Timeout while waiting xfer.
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@retval EFI_ABORTED Controller aborted xfer.
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@retval EFI_DEVICE_ERROR Device error detected by controller.
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**/
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EFI_STATUS
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EFIAPI
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I2cWriteMultipleByte (
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IN EFI_I2C_DEVICE_ADDRESS SlaveAddress,
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IN EFI_I2C_ADDR_MODE AddrMode,
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IN UINTN *Length,
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IN OUT VOID *Buffer
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);
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/**
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The I2cReadMultipleByte() function is a wrapper function for the ReadMultipleByte
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function. Provides a standard way to execute multiple byte writes to an IC2 device
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(e.g. when accessing sub-addresses or when reading block of data), as defined
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in the I2C Specification (I2C combined write/read protocol).
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@param SlaveAddress The I2C slave address of the device
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with which to communicate.
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@param AddrMode I2C Addressing Mode: 7-bit or 10-bit address.
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@param WriteLength No. of bytes to be written. In this case data
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written typically contains sub-address or sub-addresses
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in Hi-Lo format, that need to be read (I2C combined
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write/read protocol).
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@param ReadLength No. of bytes to be read from I2C slave device.
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need to be read.
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@param Buffer Contains the value of byte data read from the
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I2C slave device.
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@retval EFI_SUCCESS Transfer success.
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@retval EFI_INVALID_PARAMETER This, WriteLength, ReadLength or Buffer
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pointers are invalid.
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@retval EFI_UNSUPPORTED Unsupported input param.
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@retval EFI_TIMEOUT Timeout while waiting xfer.
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@retval EFI_ABORTED Controller aborted xfer.
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@retval EFI_DEVICE_ERROR Device error detected by controller.
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**/
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EFI_STATUS
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EFIAPI
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I2cReadMultipleByte (
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IN EFI_I2C_DEVICE_ADDRESS SlaveAddress,
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IN EFI_I2C_ADDR_MODE AddrMode,
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IN UINTN *WriteLength,
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IN UINTN *ReadLength,
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IN OUT VOID *Buffer
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);
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#endif
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