75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
/*
|
|
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>
|
|
#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_RDRW_IOCTL_MAX_MSGS 42
|
|
|
|
#ifdef __KERNEL__
|
|
#define I2C_MAJOR 89 /* Device major number */
|
|
#endif
|
|
|
|
#endif /* _LINUX_I2C_DEV_H */
|