1/*
2 * Copyright (c) 2004-2007 Marcus Overhagen <marcus@overhagen.de>
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without restriction,
7 * including without limitation the rights to use, copy, modify,
8 * merge, publish, distribute, sublicense, and/or sell copies of
9 * the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
17 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
19 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25#ifndef __I2C_CORE_H
26#define __I2C_CORE_H
27
28#include <SupportDefs.h>
29
30typedef void (*i2c_set_scl)(void *cookie, int state);
31typedef void (*i2c_set_sda)(void *cookie, int state);
32typedef int  (*i2c_get_scl)(void *cookie);
33typedef int  (*i2c_get_sda)(void *cookie);
34
35struct _i2c_bus;
36typedef struct _i2c_bus i2c_bus;
37
38i2c_bus *i2c_create_bus(void *cookie,
39						int freqency,
40						bigtime_t timeout,
41						i2c_set_scl set_scl,
42						i2c_set_sda set_sda,
43						i2c_get_scl get_scl,
44						i2c_get_sda get_sda);
45
46void i2c_delete_bus(i2c_bus *bus);
47
48status_t i2c_read(i2c_bus *bus, int address, void *data, int size);
49status_t i2c_write(i2c_bus *bus, int address, const void *data, int size);
50
51status_t i2c_xfer(i2c_bus *bus, int address,
52				  const void *write_data, int write_size,
53				  void *read_data, int read_size);
54
55#endif
56