forked from Imagelibrary/rtems
151 lines
3.6 KiB
C
151 lines
3.6 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @brief RTEMS Port of Linux I2C Device API
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*
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* @ingroup I2CLinux
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*/
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/*
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* Copyright (c) 2014 embedded brains GmbH & Co. KG
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _UAPI_LINUX_I2C_DEV_H
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#define _UAPI_LINUX_I2C_DEV_H
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#include <stdint.h>
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/**
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* @addtogroup I2CLinux
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*
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* @{
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*/
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/**
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* @name I2C IO Control Commands
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*
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* @{
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*/
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/**
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* @brief Sets the count of transfer retries in case a slave
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* device does not acknowledge a transaction.
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*
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* The argument type is unsigned long.
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*/
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#define I2C_RETRIES 0x701
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/**
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* @brief Sets the transfer timeout in 10ms units.
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*
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* The argument type is unsigned long.
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*/
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#define I2C_TIMEOUT 0x702
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/**
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* @brief Sets the slave address.
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*
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* It is an error to set a slave address already used by another slave device.
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*
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* The argument type is unsigned long.
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*/
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#define I2C_SLAVE 0x703
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/**
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* @brief Forces setting the slave address.
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*
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* The argument type is unsigned long.
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*/
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#define I2C_SLAVE_FORCE 0x706
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/**
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* @brief Enables 10-bit addresses if argument is non-zero, otherwise
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* disables 10-bit addresses.
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*
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* The argument type is unsigned long.
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*/
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#define I2C_TENBIT 0x704
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/**
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* @brief Gets the I2C controller functionality information.
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*
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* The argument type is a pointer to an unsigned long.
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*/
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#define I2C_FUNCS 0x705
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/**
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* @brief Performs a combined read/write transfer.
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*
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* Only one stop condition is signalled.
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*
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* The argument type is a pointer to struct i2c_rdwr_ioctl_data.
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*/
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#define I2C_RDWR 0x707
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/**
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* @brief Enables System Management Bus (SMBus) Packet Error Checking (PEC)
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* if argument is non-zero, otherwise disables PEC.
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*
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* The argument type is unsigned long.
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*/
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#define I2C_PEC 0x708
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/**
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* @brief Performs an SMBus transfer.
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*
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* The argument type is a pointer to struct i2c_smbus_ioctl_data.
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*/
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#define I2C_SMBUS 0x720
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/** @} */
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/**
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* @brief Argument type for I2C_SMBUS IO control call.
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*/
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struct i2c_smbus_ioctl_data {
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uint8_t read_write;
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uint8_t command;
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uint32_t size;
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union i2c_smbus_data *data;
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};
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/**
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* @brief Argument type for I2C_RDWR IO control call.
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*/
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struct i2c_rdwr_ioctl_data {
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struct i2c_msg *msgs;
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uint32_t nmsgs;
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};
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/**
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* @brief Maximum count of messages for one IO control call.
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*/
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#define I2C_RDRW_IOCTL_MAX_MSGS 42
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/** @} */
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#endif /* _UAPI_LINUX_I2C_DEV_H */
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