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1da177e4 LT |
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 | |
5694f8a8 JD |
19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
20 | MA 02110-1301 USA. | |
1da177e4 LT |
21 | */ |
22 | ||
1da177e4 LT |
23 | #ifndef _LINUX_I2C_DEV_H |
24 | #define _LINUX_I2C_DEV_H | |
25 | ||
26 | #include <linux/types.h> | |
3607d1df | 27 | #include <linux/compiler.h> |
1da177e4 | 28 | |
08fb68bb DB |
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 */ | |
cd97f39b | 37 | #define I2C_TIMEOUT 0x0702 /* set timeout in units of 10 ms */ |
08fb68bb DB |
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 | ||
1da177e4 LT |
54 | |
55 | /* This is the structure as used in the I2C_SMBUS ioctl call */ | |
56 | struct i2c_smbus_ioctl_data { | |
57 | __u8 read_write; | |
58 | __u8 command; | |
59 | __u32 size; | |
60 | union i2c_smbus_data __user *data; | |
61 | }; | |
62 | ||
63 | /* This is the structure as used in the I2C_RDWR ioctl call */ | |
64 | struct i2c_rdwr_ioctl_data { | |
65 | struct i2c_msg __user *msgs; /* pointers to i2c_msgs */ | |
66 | __u32 nmsgs; /* number of i2c_msgs */ | |
67 | }; | |
68 | ||
69 | #define I2C_RDRW_IOCTL_MAX_MSGS 42 | |
70 | ||
08fb68bb DB |
71 | #ifdef __KERNEL__ |
72 | #define I2C_MAJOR 89 /* Device major number */ | |
73 | #endif | |
74 | ||
1da177e4 | 75 | #endif /* _LINUX_I2C_DEV_H */ |