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- /*
- 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., 51 Franklin Street, Fifth Floor, Boston,
- MA 02110-1301 USA.
- */
- #ifndef _UAPI_LINUX_I2C_DEV_H
- #define _UAPI_LINUX_I2C_DEV_H
- #include <linux/types.h>
- #include <linux/compiler.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 __user *data;
- };
- /* This is the structure as used in the I2C_RDWR ioctl call */
- struct i2c_rdwr_ioctl_data {
- struct i2c_msg __user *msgs; /* pointers to i2c_msgs */
- __u32 nmsgs; /* number of i2c_msgs */
- };
- #define I2C_RDWR_IOCTL_MAX_MSGS 42
- /* Originally defined with a typo, keep it for compatibility */
- #define I2C_RDRW_IOCTL_MAX_MSGS I2C_RDWR_IOCTL_MAX_MSGS
- #endif /* _UAPI_LINUX_I2C_DEV_H */
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