[net-next-2.6.git] / include / linux / i2c-dev.h

/*
    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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifndef _LINUX_I2C_DEV_H
#define _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_RDRW_IOCTL_MAX_MSGS	42

#ifdef __KERNEL__
#define I2C_MAJOR	89		/* Device major number		*/
#endif

#endif /* _LINUX_I2C_DEV_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	i2c-dev.h - i2c-bus driver, char device interface
	3
	4	Copyright (C) 1995-97 Simon G. Vogl
	5	Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
1da177e4 LT	22	#ifndef _LINUX_I2C_DEV_H
	23	#define _LINUX_I2C_DEV_H
	24
	25	#include <linux/types.h>
3607d1df	26	#include <linux/compiler.h>
1da177e4	27
08fb68bb DB	28	/* /dev/i2c-X ioctl commands. The ioctl's parameter is always an
	29	* unsigned long, except for:
	30	* - I2C_FUNCS, takes pointer to an unsigned long
	31	* - I2C_RDWR, takes pointer to struct i2c_rdwr_ioctl_data
	32	* - I2C_SMBUS, takes pointer to struct i2c_smbus_ioctl_data
	33	*/
	34	#define I2C_RETRIES 0x0701 /* number of times a device address should
	35	be polled when not acknowledging */
cd97f39b	36	#define I2C_TIMEOUT 0x0702 /* set timeout in units of 10 ms */
08fb68bb DB	37
	38	/* NOTE: Slave address is 7 or 10 bits, but 10-bit addresses
	39	* are NOT supported! (due to code brokenness)
	40	*/
	41	#define I2C_SLAVE 0x0703 /* Use this slave address */
	42	#define I2C_SLAVE_FORCE 0x0706 /* Use this slave address, even if it
	43	is already in use by a driver! */
	44	#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
	45
	46	#define I2C_FUNCS 0x0705 /* Get the adapter functionality mask */
	47
	48	#define I2C_RDWR 0x0707 /* Combined R/W transfer (one STOP only) */
	49
	50	#define I2C_PEC 0x0708 /* != 0 to use PEC with SMBus */
	51	#define I2C_SMBUS 0x0720 /* SMBus transfer */
	52
1da177e4 LT	53
	54	/* This is the structure as used in the I2C_SMBUS ioctl call */
	55	struct i2c_smbus_ioctl_data {
	56	__u8 read_write;
	57	__u8 command;
	58	__u32 size;
	59	union i2c_smbus_data __user *data;
	60	};
	61
	62	/* This is the structure as used in the I2C_RDWR ioctl call */
	63	struct i2c_rdwr_ioctl_data {
	64	struct i2c_msg __user msgs; / pointers to i2c_msgs */
	65	__u32 nmsgs; /* number of i2c_msgs */
	66	};
	67
	68	#define I2C_RDRW_IOCTL_MAX_MSGS 42
	69
08fb68bb DB	70	#ifdef __KERNEL__
	71	#define I2C_MAJOR 89 /* Device major number */
	72	#endif
	73
1da177e4	74	#endif /* _LINUX_I2C_DEV_H */