| 1 | /* $Id: VBoxVgaI2c.h 96407 2022-08-22 17:43:14Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBoxVgaI2c.h
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2009-2022 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 | /*
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| 38 | This code is based on:
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| 39 |
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| 40 | I2c Bus byte read/write functions.
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| 41 |
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| 42 | Copyright (c) 2008 - 2009, Intel Corporation
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| 43 | All rights reserved. This program and the accompanying materials
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| 44 | are licensed and made available under the terms and conditions of the BSD License
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| 45 | which accompanies this distribution. The full text of the license may be found at
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| 46 | http://opensource.org/licenses/bsd-license.php
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| 47 |
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| 48 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 49 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 50 |
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| 51 | */
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| 52 |
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| 53 | #ifndef _CIRRUS_LOGIC_I2C_H_
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| 54 | #define _CIRRUS_LOGIC_I2C_H_
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| 55 |
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| 56 | #include <Protocol/PciIo.h>
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| 57 |
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| 58 | /**
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| 59 | Read one byte data on I2C Bus.
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| 60 |
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| 61 | Read one byte data from the slave device connected to I2C Bus.
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| 62 | If Data is NULL, then ASSERT().
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| 63 |
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| 64 | @param PciIo The pointer to PCI_IO_PROTOCOL.
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| 65 | @param DeviceAddress Slave device's address.
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| 66 | @param RegisterAddress The register address on slave device.
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| 67 | @param Data The pointer to returned data if EFI_SUCCESS returned.
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| 68 |
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| 69 | @retval EFI_DEVICE_ERROR
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| 70 | @retval EFI_SUCCESS
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| 71 |
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| 72 | **/
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| 73 | EFI_STATUS
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| 74 | EFIAPI
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| 75 | I2cReadByte (
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| 76 | EFI_PCI_IO_PROTOCOL *PciIo,
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| 77 | UINT8 DeviceAddress,
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| 78 | UINT8 RegisterAddress,
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| 79 | UINT8 *Data
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| 80 | );
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| 81 |
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| 82 | /**
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| 83 | Write one byte data onto I2C Bus.
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| 84 |
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| 85 | Write one byte data to the slave device connected to I2C Bus.
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| 86 | If Data is NULL, then ASSERT().
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| 87 |
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| 88 | @param PciIo The pointer to PCI_IO_PROTOCOL.
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| 89 | @param DeviceAddress Slave device's address.
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| 90 | @param RegisterAddress The register address on slave device.
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| 91 | @param Data The pointer to write data.
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| 92 |
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| 93 | @retval EFI_DEVICE_ERROR
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| 94 | @retval EFI_SUCCESS
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| 95 |
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| 96 | **/
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| 97 | EFI_STATUS
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| 98 | EFIAPI
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| 99 | I2cWriteByte (
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| 100 | EFI_PCI_IO_PROTOCOL *PciIo,
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| 101 | UINT8 DeviceAddress,
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| 102 | UINT8 RegisterAddress,
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| 103 | UINT8 *Data
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| 104 | );
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| 105 |
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| 106 | #endif
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