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