1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linu <<
2 /* 1 /*
3 * i2c-dev.h - I2C bus char device interface !! 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 <frod !! 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., 51 Franklin Street, Fifth Floor, Boston,
>> 20 MA 02110-1301 USA.
>> 21 */
8 22
9 #ifndef _UAPI_LINUX_I2C_DEV_H 23 #ifndef _UAPI_LINUX_I2C_DEV_H
10 #define _UAPI_LINUX_I2C_DEV_H 24 #define _UAPI_LINUX_I2C_DEV_H
11 25
12 #include <linux/types.h> 26 #include <linux/types.h>
13 #include <linux/compiler.h> 27 #include <linux/compiler.h>
14 28
15 /* /dev/i2c-X ioctl commands. The ioctl's par 29 /* /dev/i2c-X ioctl commands. The ioctl's parameter is always an
16 * unsigned long, except for: 30 * unsigned long, except for:
17 * - I2C_FUNCS, takes pointer to an unsig 31 * - I2C_FUNCS, takes pointer to an unsigned long
18 * - I2C_RDWR, takes pointer to struct i2 32 * - I2C_RDWR, takes pointer to struct i2c_rdwr_ioctl_data
19 * - I2C_SMBUS, takes pointer to struct i 33 * - I2C_SMBUS, takes pointer to struct i2c_smbus_ioctl_data
20 */ 34 */
21 #define I2C_RETRIES 0x0701 /* number of t 35 #define I2C_RETRIES 0x0701 /* number of times a device address should
22 be polled w 36 be polled when not acknowledging */
23 #define I2C_TIMEOUT 0x0702 /* set timeout 37 #define I2C_TIMEOUT 0x0702 /* set timeout in units of 10 ms */
24 38
25 /* NOTE: Slave address is 7 or 10 bits, but 10 39 /* NOTE: Slave address is 7 or 10 bits, but 10-bit addresses
26 * are NOT supported! (due to code brokenness) 40 * are NOT supported! (due to code brokenness)
27 */ 41 */
28 #define I2C_SLAVE 0x0703 /* Use this sl 42 #define I2C_SLAVE 0x0703 /* Use this slave address */
29 #define I2C_SLAVE_FORCE 0x0706 /* Use this sl 43 #define I2C_SLAVE_FORCE 0x0706 /* Use this slave address, even if it
30 is already 44 is already in use by a driver! */
31 #define I2C_TENBIT 0x0704 /* 0 for 7 bit 45 #define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
32 46
33 #define I2C_FUNCS 0x0705 /* Get the ada 47 #define I2C_FUNCS 0x0705 /* Get the adapter functionality mask */
34 48
35 #define I2C_RDWR 0x0707 /* Combined R/ 49 #define I2C_RDWR 0x0707 /* Combined R/W transfer (one STOP only) */
36 50
37 #define I2C_PEC 0x0708 /* != 0 to use 51 #define I2C_PEC 0x0708 /* != 0 to use PEC with SMBus */
38 #define I2C_SMBUS 0x0720 /* SMBus trans 52 #define I2C_SMBUS 0x0720 /* SMBus transfer */
39 53
40 54
41 /* This is the structure as used in the I2C_SM 55 /* This is the structure as used in the I2C_SMBUS ioctl call */
42 struct i2c_smbus_ioctl_data { 56 struct i2c_smbus_ioctl_data {
43 __u8 read_write; 57 __u8 read_write;
44 __u8 command; 58 __u8 command;
45 __u32 size; 59 __u32 size;
46 union i2c_smbus_data __user *data; 60 union i2c_smbus_data __user *data;
47 }; 61 };
48 62
49 /* This is the structure as used in the I2C_RD 63 /* This is the structure as used in the I2C_RDWR ioctl call */
50 struct i2c_rdwr_ioctl_data { 64 struct i2c_rdwr_ioctl_data {
51 struct i2c_msg __user *msgs; /* poi 65 struct i2c_msg __user *msgs; /* pointers to i2c_msgs */
52 __u32 nmsgs; /* num 66 __u32 nmsgs; /* number of i2c_msgs */
53 }; 67 };
54 68
55 #define I2C_RDWR_IOCTL_MAX_MSGS 42 69 #define I2C_RDWR_IOCTL_MAX_MSGS 42
56 /* Originally defined with a typo, keep it for 70 /* Originally defined with a typo, keep it for compatibility */
57 #define I2C_RDRW_IOCTL_MAX_MSGS I2C_RD 71 #define I2C_RDRW_IOCTL_MAX_MSGS I2C_RDWR_IOCTL_MAX_MSGS
58 72
59 73
60 #endif /* _UAPI_LINUX_I2C_DEV_H */ 74 #endif /* _UAPI_LINUX_I2C_DEV_H */
61 75
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