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01: /*
02:     i2c-dev.h - i2c-bus driver, char device interface
03: 
04:     Copyright (C) 1995-97 Simon G. Vogl
05:     Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
06: 
07:     This program is free software; you can redistribute it and/or modify
08:     it under the terms of the GNU General Public License as published by
09:     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., 675 Mass Ave, Cambridge, MA 02139, USA.
20: */
21: 
22: #ifndef _LINUX_I2C_DEV_H
23: #define _LINUX_I2C_DEV_H
24: 
25: #include <linux/types.h>
26: 
27: 
28: /* /dev/i2c-X ioctl commands.  The ioctl's parameter is always an
29:  * unsigned long, except for:
30:  *      - I2C_FUNCS, takes pointer to an unsigned long
31:  *      - I2C_RDWR, takes pointer to struct i2c_rdwr_ioctl_data
32:  *      - I2C_SMBUS, takes pointer to struct i2c_smbus_ioctl_data
33:  */
34: #define I2C_RETRIES     0x0701  /* number of times a device address should
35:                                    be polled when not acknowledging */
36: #define I2C_TIMEOUT     0x0702  /* set timeout in units of 10 ms */
37: 
38: /* NOTE: Slave address is 7 or 10 bits, but 10-bit addresses
39:  * are NOT supported! (due to code brokenness)
40:  */
41: #define I2C_SLAVE       0x0703  /* Use this slave address */
42: #define I2C_SLAVE_FORCE 0x0706  /* Use this slave address, even if it
43:                                    is already in use by a driver! */
44: #define I2C_TENBIT      0x0704  /* 0 for 7 bit addrs, != 0 for 10 bit */
45: 
46: #define I2C_FUNCS       0x0705  /* Get the adapter functionality mask */
47: 
48: #define I2C_RDWR        0x0707  /* Combined R/W transfer (one STOP only) */
49: 
50: #define I2C_PEC         0x0708  /* != 0 to use PEC with SMBus */
51: #define I2C_SMBUS       0x0720  /* SMBus transfer */
52: 
53: 
54: /* This is the structure as used in the I2C_SMBUS ioctl call */
55: struct i2c_smbus_ioctl_data {
56:         __u8 read_write;
57:         __u8 command;
58:         __u32 size;
59:         union i2c_smbus_data *data;
60: };
61: 
62: /* This is the structure as used in the I2C_RDWR ioctl call */
63: struct i2c_rdwr_ioctl_data {
64:         struct i2c_msg *msgs;   /* pointers to i2c_msgs */
65:         __u32 nmsgs;                    /* number of i2c_msgs */
66: };
67: 
68: #define  I2C_RDRW_IOCTL_MAX_MSGS        42
69: 
70: 
71: #endif /* _LINUX_I2C_DEV_H */
72: 

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