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Add Sample I2C Library for Baytrail I2C Controller.

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Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: David Wei  <david.wei@intel.com>
Reviewed-by: Tim He <time.he@intel.com> 


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17546 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
David Wei
2015-06-02 01:47:57 +00:00
committed by zwei4
parent c85bc0c9d4
commit 4e5220964b
12 changed files with 2437 additions and 0 deletions
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64
Vlv2TbltDevicePkg/Include/Library/I2CLib.h Normal file
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/** @file
Interface Definitions for I2C Lib.
Copyright (c) 2004 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
--*/
#include <Uefi.h>
#include <Library/IoLib.h>
#ifndef I2C_LIB_HEADER_H
#define I2C_LIB_HEADER_H
/**
Reads a Byte from I2C Device.
@param I2cControllerIndex I2C Bus no to which the I2C device has been connected
@param SlaveAddress Device Address from which the byte value has to be read
@param Offset Offset from which the data has to be read
@param ReadBytes Number of bytes to be read
@param *ReadBuffer Address to which the value read has to be stored
@return EFI_SUCCESS If the byte value has been successfully read
@return EFI_DEVICE_ERROR Operation Failed, Device Error
**/
EFI_STATUS
ByteReadI2C(
IN UINT8 BusNo,
IN UINT8 SlaveAddress,
IN UINT8 Offset,
IN UINTN ReadBytes,
OUT UINT8 *ReadBuffer
);
/**
Writes a Byte to I2C Device.
@param I2cControllerIndex I2C Bus no to which the I2C device has been connected
@param SlaveAddress Device Address from which the byte value has to be written
@param Offset Offset from which the data has to be written
@param WriteBytes Number of bytes to be written
@param *Byte Address to which the value written is stored
@return EFI_SUCCESS If the byte value has been successfully read
@return EFI_DEVICE_ERROR Operation Failed, Device Error
**/
EFI_STATUS ByteWriteI2C(
IN UINT8 BusNo,
IN UINT8 SlaveAddress,
IN UINT8 Offset,
IN UINTN WriteBytes,
IN UINT8 *WriteBuffer
);
#endif