1 /* SPDX-License-Identifier: GPL-2.0-or-later * <<
2 /* 1 /*
3 i2c-dev.h - i2c-bus driver, char device in 2 i2c-dev.h - i2c-bus driver, char device interface
4 3
5 Copyright (C) 1995-97 Simon G. Vogl 4 Copyright (C) 1995-97 Simon G. Vogl
6 Copyright (C) 1998-99 Frodo Looijaard <fro 5 Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
7 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.
8 */ 20 */
>> 21
9 #ifndef _LINUX_I2C_DEV_H 22 #ifndef _LINUX_I2C_DEV_H
10 #define _LINUX_I2C_DEV_H 23 #define _LINUX_I2C_DEV_H
11 24
12 #include <uapi/linux/i2c-dev.h> !! 25 #include <linux/types.h>
>> 26 #include <linux/compiler.h>
>> 27
>> 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 */
>> 36 #define I2C_TIMEOUT 0x0702 /* set timeout in units of 10 ms */
>> 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) */
13 49
>> 50 #define I2C_PEC 0x0708 /* != 0 to use PEC with SMBus */
>> 51 #define I2C_SMBUS 0x0720 /* SMBus transfer */
>> 52
>> 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
>> 70 #ifdef __KERNEL__
14 #define I2C_MAJOR 89 /* Dev 71 #define I2C_MAJOR 89 /* Device major number */
>> 72 #endif
>> 73
15 #endif /* _LINUX_I2C_DEV_H */ 74 #endif /* _LINUX_I2C_DEV_H */
16 75
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