[linux-2.6-block.git] / include / uapi / linux / i2c-dev.h

/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
    i2c-dev.h - i2c-bus driver, char device interface

    Copyright (C) 1995-97 Simon G. Vogl
    Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
    MA 02110-1301 USA.
*/

#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 */
Commit	Line	Data
e2be04c7	1	/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
607ca46e DH	2	/*
	3	i2c-dev.h - i2c-bus driver, char device interface
	4
	5	Copyright (C) 1995-97 Simon G. Vogl
	6	Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
	7
	8	This program is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2 of the License, or
	11	(at your option) any later version.
	12
	13	This program is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with this program; if not, write to the Free Software
	20	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
	21	MA 02110-1301 USA.
	22	*/
	23
	24	#ifndef _UAPI_LINUX_I2C_DEV_H
	25	#define _UAPI_LINUX_I2C_DEV_H
	26
	27	#include <linux/types.h>
	28	#include <linux/compiler.h>
	29
	30	/* /dev/i2c-X ioctl commands. The ioctl's parameter is always an
	31	* unsigned long, except for:
	32	* - I2C_FUNCS, takes pointer to an unsigned long
	33	* - I2C_RDWR, takes pointer to struct i2c_rdwr_ioctl_data
	34	* - I2C_SMBUS, takes pointer to struct i2c_smbus_ioctl_data
	35	*/
	36	#define I2C_RETRIES 0x0701 /* number of times a device address should
	37	be polled when not acknowledging */
	38	#define I2C_TIMEOUT 0x0702 /* set timeout in units of 10 ms */
	39
	40	/* NOTE: Slave address is 7 or 10 bits, but 10-bit addresses
	41	* are NOT supported! (due to code brokenness)
	42	*/
	43	#define I2C_SLAVE 0x0703 /* Use this slave address */
	44	#define I2C_SLAVE_FORCE 0x0706 /* Use this slave address, even if it
	45	is already in use by a driver! */
	46	#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
	47
	48	#define I2C_FUNCS 0x0705 /* Get the adapter functionality mask */
	49
	50	#define I2C_RDWR 0x0707 /* Combined R/W transfer (one STOP only) */
	51
	52	#define I2C_PEC 0x0708 /* != 0 to use PEC with SMBus */
	53	#define I2C_SMBUS 0x0720 /* SMBus transfer */
	54
	55
	56	/* This is the structure as used in the I2C_SMBUS ioctl call */
	57	struct i2c_smbus_ioctl_data {
	58	__u8 read_write;
	59	__u8 command;
	60	__u32 size;
	61	union i2c_smbus_data __user *data;
	62	};
	63
	64	/* This is the structure as used in the I2C_RDWR ioctl call */
	65	struct i2c_rdwr_ioctl_data {
66	struct i2c_msg __user msgs; / pointers to i2c_msgs */
67	__u32 nmsgs; /* number of i2c_msgs */
68	};
69
c57d3e7a JD	70	#define I2C_RDWR_IOCTL_MAX_MSGS 42
	71	/* Originally defined with a typo, keep it for compatibility */
	72	#define I2C_RDRW_IOCTL_MAX_MSGS I2C_RDWR_IOCTL_MAX_MSGS
607ca46e DH	73
	74
	75	#endif /* _UAPI_LINUX_I2C_DEV_H */