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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/linux/i2c-dev.h
2 i2c-dev.h - i2c-bus driver, char device interface
4 Copyright (C) 1995-97 Simon G. Vogl
5 Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
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.
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.
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.
22 #ifndef _LINUX_I2C_DEV_H
23 #define _LINUX_I2C_DEV_H
25 #include <linux/types.h>
26 #include <linux/compiler.h>
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
34 #define I2C_RETRIES 0x0701 /* number of times a device address should
35 be polled when not acknowledging */
36 #define I2C_TIMEOUT 0x0702 /* set timeout in jiffies - call with int */
38 /* NOTE: Slave address is 7 or 10 bits, but 10-bit addresses
39 * are NOT supported! (due to code brokenness)
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 */
46 #define I2C_FUNCS 0x0705 /* Get the adapter functionality mask */
48 #define I2C_RDWR 0x0707 /* Combined R/W transfer (one STOP only) */
50 #define I2C_PEC 0x0708 /* != 0 to use PEC with SMBus */
51 #define I2C_SMBUS 0x0720 /* SMBus transfer */
54 /* This is the structure as used in the I2C_SMBUS ioctl call */
55 struct i2c_smbus_ioctl_data
{
59 union i2c_smbus_data __user
*data
;
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 */
68 #define I2C_RDRW_IOCTL_MAX_MSGS 42
71 #define I2C_MAJOR 89 /* Device major number */
74 #endif /* _LINUX_I2C_DEV_H */