/*
      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 */