| 1 | /* |
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| 2 | i2c-dev.h - i2c-bus driver, char device interface |
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| 3 | |
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| 4 | Copyright (C) 1995-97 Simon G. Vogl |
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| 5 | Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl> |
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| 6 | |
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| 7 | This program is free software; you can redistribute it and/or modify |
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| 8 | it under the terms of the GNU General Public License as published by |
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| 9 | the Free Software Foundation; either version 2 of the License, or |
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| 10 | (at your option) any later version. |
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| 11 | |
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| 12 | This program is distributed in the hope that it will be useful, |
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | GNU General Public License for more details. |
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| 16 | |
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| 17 | You should have received a copy of the GNU General Public License |
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| 18 | along with this program; if not, write to the Free Software |
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| 19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
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| 20 | MA 02110-1301 USA. |
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| 21 | */ |
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| 22 | |
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| 23 | #ifndef _LINUX_I2C_DEV_H |
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| 24 | #define _LINUX_I2C_DEV_H |
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| 25 | |
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| 26 | #include <linux/types.h> |
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| 27 | |
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| 28 | |
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| 29 | /* /dev/i2c-X ioctl commands. The ioctl's parameter is always an |
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| 30 | * unsigned long, except for: |
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| 31 | * - I2C_FUNCS, takes pointer to an unsigned long |
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| 32 | * - I2C_RDWR, takes pointer to struct i2c_rdwr_ioctl_data |
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| 33 | * - I2C_SMBUS, takes pointer to struct i2c_smbus_ioctl_data |
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| 34 | */ |
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| 35 | #define I2C_RETRIES 0x0701 /* number of times a device address should |
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| 36 | be polled when not acknowledging */ |
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| 37 | #define I2C_TIMEOUT 0x0702 /* set timeout in units of 10 ms */ |
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| 38 | |
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| 39 | /* NOTE: Slave address is 7 or 10 bits, but 10-bit addresses |
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| 40 | * are NOT supported! (due to code brokenness) |
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| 41 | */ |
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| 42 | #define I2C_SLAVE 0x0703 /* Use this slave address */ |
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| 43 | #define I2C_SLAVE_FORCE 0x0706 /* Use this slave address, even if it |
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| 44 | is already in use by a driver! */ |
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| 45 | #define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */ |
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| 46 | |
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| 47 | #define I2C_FUNCS 0x0705 /* Get the adapter functionality mask */ |
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| 48 | |
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| 49 | #define I2C_RDWR 0x0707 /* Combined R/W transfer (one STOP only) */ |
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| 50 | |
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| 51 | #define I2C_PEC 0x0708 /* != 0 to use PEC with SMBus */ |
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| 52 | #define I2C_SMBUS 0x0720 /* SMBus transfer */ |
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| 53 | |
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| 54 | |
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| 55 | /* This is the structure as used in the I2C_SMBUS ioctl call */ |
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| 56 | struct i2c_smbus_ioctl_data { |
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| 57 | __u8 read_write; |
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| 58 | __u8 command; |
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| 59 | __u32 size; |
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| 60 | union i2c_smbus_data *data; |
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| 61 | }; |
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| 62 | |
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| 63 | /* This is the structure as used in the I2C_RDWR ioctl call */ |
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| 64 | struct i2c_rdwr_ioctl_data { |
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| 65 | struct i2c_msg *msgs; /* pointers to i2c_msgs */ |
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| 66 | __u32 nmsgs; /* number of i2c_msgs */ |
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| 67 | }; |
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| 68 | |
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| 69 | #define I2C_RDRW_IOCTL_MAX_MSGS 42 |
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| 70 | |
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| 71 | |
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| 72 | #endif /* _LINUX_I2C_DEV_H */ |
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