include/linux/i2c-dev.h

   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
  22 #ifndef _LINUX_I2C_DEV_H
  23 #define _LINUX_I2C_DEV_H
  24
  25 #include <linux/types.h>
  26 #include <linux/compiler.h>
  27
  28 /* Some IOCTL commands are defined in <linux/i2c.h> */
  29 /* Note: 10-bit addresses are NOT supported! */
  30
  31 /* This is the structure as used in the I2C_SMBUS ioctl call */
  32 struct i2c_smbus_ioctl_data {
  33         __u8 read_write;
  34         __u8 command;
  35         __u32 size;
  36         union i2c_smbus_data __user *data;
  37 };
  38
  39 /* This is the structure as used in the I2C_RDWR ioctl call */
  40 struct i2c_rdwr_ioctl_data {
  41         struct i2c_msg __user *msgs;    /* pointers to i2c_msgs */
  42         __u32 nmsgs;                    /* number of i2c_msgs */
  43 };
  44
  45 #define  I2C_RDRW_IOCTL_MAX_MSGS        42
  46
  47 #endif /* _LINUX_I2C_DEV_H */