root/i2c-tools/trunk/include/linux/i2c-dev.h

Revision 6048, 2.4 KB (checked in by khali, 2 years ago)

i2c-dev: Move SMBus helper functions to include/i2c/smbus.h

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
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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., 51 Franklin Street, Fifth Floor, Boston,
20    MA 02110-1301 USA.
21*/
22
23#ifndef _LINUX_I2C_DEV_H
24#define _LINUX_I2C_DEV_H
25
26#include <linux/types.h>
27
28
29/* /dev/i2c-X ioctl commands.  The ioctl's parameter is always an
30 * unsigned long, except for:
31 *      - I2C_FUNCS, takes pointer to an unsigned long
32 *      - I2C_RDWR, takes pointer to struct i2c_rdwr_ioctl_data
33 *      - I2C_SMBUS, takes pointer to struct i2c_smbus_ioctl_data
34 */
35#define I2C_RETRIES     0x0701  /* number of times a device address should
36                                   be polled when not acknowledging */
37#define I2C_TIMEOUT     0x0702  /* set timeout in units of 10 ms */
38
39/* NOTE: Slave address is 7 or 10 bits, but 10-bit addresses
40 * are NOT supported! (due to code brokenness)
41 */
42#define I2C_SLAVE       0x0703  /* Use this slave address */
43#define I2C_SLAVE_FORCE 0x0706  /* Use this slave address, even if it
44                                   is already in use by a driver! */
45#define I2C_TENBIT      0x0704  /* 0 for 7 bit addrs, != 0 for 10 bit */
46
47#define I2C_FUNCS       0x0705  /* Get the adapter functionality mask */
48
49#define I2C_RDWR        0x0707  /* Combined R/W transfer (one STOP only) */
50
51#define I2C_PEC         0x0708  /* != 0 to use PEC with SMBus */
52#define I2C_SMBUS       0x0720  /* SMBus transfer */
53
54
55/* This is the structure as used in the I2C_SMBUS ioctl call */
56struct i2c_smbus_ioctl_data {
57        __u8 read_write;
58        __u8 command;
59        __u32 size;
60        union i2c_smbus_data *data;
61};
62
63/* This is the structure as used in the I2C_RDWR ioctl call */
64struct i2c_rdwr_ioctl_data {
65        struct i2c_msg *msgs;   /* pointers to i2c_msgs */
66        __u32 nmsgs;                    /* number of i2c_msgs */
67};
68
69#define  I2C_RDRW_IOCTL_MAX_MSGS        42
70
71
72#endif /* _LINUX_I2C_DEV_H */
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