61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
|
||
|
|
/*
|
||
|
|
* i2c-dev.h - I2C bus char device interface
|
||
|
|
*
|
||
|
|
* Copyright (C) 1995-97 Simon G. Vogl
|
||
|
|
* Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _UAPI_LINUX_I2C_DEV_H
|
||
|
|
#define _UAPI_LINUX_I2C_DEV_H
|
||
|
|
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/compiler.h>
|
||
|
|
|
||
|
|
/* /dev/i2c-X ioctl commands. The ioctl's parameter is always an
|
||
|
|
* unsigned long, except for:
|
||
|
|
* - I2C_FUNCS, takes pointer to an unsigned long
|
||
|
|
* - I2C_RDWR, takes pointer to struct i2c_rdwr_ioctl_data
|
||
|
|
* - I2C_SMBUS, takes pointer to struct i2c_smbus_ioctl_data
|
||
|
|
*/
|
||
|
|
#define I2C_RETRIES 0x0701 /* number of times a device address should
|
||
|
|
be polled when not acknowledging */
|
||
|
|
#define I2C_TIMEOUT 0x0702 /* set timeout in units of 10 ms */
|
||
|
|
|
||
|
|
/* NOTE: Slave address is 7 or 10 bits, but 10-bit addresses
|
||
|
|
* are NOT supported! (due to code brokenness)
|
||
|
|
*/
|
||
|
|
#define I2C_SLAVE 0x0703 /* Use this slave address */
|
||
|
|
#define I2C_SLAVE_FORCE 0x0706 /* Use this slave address, even if it
|
||
|
|
is already in use by a driver! */
|
||
|
|
#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
|
||
|
|
|
||
|
|
#define I2C_FUNCS 0x0705 /* Get the adapter functionality mask */
|
||
|
|
|
||
|
|
#define I2C_RDWR 0x0707 /* Combined R/W transfer (one STOP only) */
|
||
|
|
|
||
|
|
#define I2C_PEC 0x0708 /* != 0 to use PEC with SMBus */
|
||
|
|
#define I2C_SMBUS 0x0720 /* SMBus transfer */
|
||
|
|
|
||
|
|
|
||
|
|
/* This is the structure as used in the I2C_SMBUS ioctl call */
|
||
|
|
struct i2c_smbus_ioctl_data {
|
||
|
|
__u8 read_write;
|
||
|
|
__u8 command;
|
||
|
|
__u32 size;
|
||
|
|
union i2c_smbus_data __user *data;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* This is the structure as used in the I2C_RDWR ioctl call */
|
||
|
|
struct i2c_rdwr_ioctl_data {
|
||
|
|
struct i2c_msg __user *msgs; /* pointers to i2c_msgs */
|
||
|
|
__u32 nmsgs; /* number of i2c_msgs */
|
||
|
|
};
|
||
|
|
|
||
|
|
#define I2C_RDWR_IOCTL_MAX_MSGS 42
|
||
|
|
/* Originally defined with a typo, keep it for compatibility */
|
||
|
|
#define I2C_RDRW_IOCTL_MAX_MSGS I2C_RDWR_IOCTL_MAX_MSGS
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* _UAPI_LINUX_I2C_DEV_H */
|