| /* |
| i2c-dev.h - i2c-bus driver, char device interface |
| |
| Copyright (C) 1995-97 Simon G. Vogl |
| Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #ifndef _LINUX_I2C_DEV_H |
| #define _LINUX_I2C_DEV_H |
| |
| #include <linux/types.h> |
| |
| |
| /* /dev/i2c-X ioctl commands. The ioctl's parameter is always an |
| * unsigned long, except for: |
| * - I2C_FUNCS, takes pointer to an unsigned long |
| * - I2C_RDWR, takes pointer to struct i2c_rdwr_ioctl_data |
| * - I2C_SMBUS, takes pointer to struct i2c_smbus_ioctl_data |
| */ |
| #define I2C_RETRIES 0x0701 /* number of times a device address should |
| be polled when not acknowledging */ |
| #define I2C_TIMEOUT 0x0702 /* set timeout in units of 10 ms */ |
| |
| /* NOTE: Slave address is 7 or 10 bits, but 10-bit addresses |
| * are NOT supported! (due to code brokenness) |
| */ |
| #define I2C_SLAVE 0x0703 /* Use this slave address */ |
| #define I2C_SLAVE_FORCE 0x0706 /* Use this slave address, even if it |
| is already in use by a driver! */ |
| #define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */ |
| |
| #define I2C_FUNCS 0x0705 /* Get the adapter functionality mask */ |
| |
| #define I2C_RDWR 0x0707 /* Combined R/W transfer (one STOP only) */ |
| |
| #define I2C_PEC 0x0708 /* != 0 to use PEC with SMBus */ |
| #define I2C_SMBUS 0x0720 /* SMBus transfer */ |
| |
| |
| /* This is the structure as used in the I2C_SMBUS ioctl call */ |
| struct i2c_smbus_ioctl_data { |
| __u8 read_write; |
| __u8 command; |
| __u32 size; |
| union i2c_smbus_data *data; |
| }; |
| |
| /* This is the structure as used in the I2C_RDWR ioctl call */ |
| struct i2c_rdwr_ioctl_data { |
| struct i2c_msg *msgs; /* pointers to i2c_msgs */ |
| __u32 nmsgs; /* number of i2c_msgs */ |
| }; |
| |
| #define I2C_RDRW_IOCTL_MAX_MSGS 42 |
| |
| |
| #endif /* _LINUX_I2C_DEV_H */ |