| David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 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 _UAPI_LINUX_I2C_DEV_H |
| 24 | #define _UAPI_LINUX_I2C_DEV_H |
| 25 | |
| 26 | #include <linux/types.h> |
| 27 | #include <linux/compiler.h> |
| 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 */ |
| 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 | |
| 71 | |
| 72 | #endif /* _UAPI_LINUX_I2C_DEV_H */ |