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/**
* @file
*
* @brief RTEMS Port of Linux I2C Device API
*
* @ingroup I2CLinux
*/
/*
* Copyright (c) 2014 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#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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