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/* $Id$ */
/** @file
* VBoxVgaI2c.h
*/
/*
* Copyright (C) 2009-2022 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*
This code is based on:
I2c Bus byte read/write functions.
Copyright (c) 2008 - 2009, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which 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.
*/
#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 connected 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 connected 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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