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Linux kernel mirror (for testing)
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linux
1/*
2 * v4l2-i2c-drv.h - contains I2C handling code that's identical for
3 * all V4L2 I2C drivers. Use this header if the
4 * I2C driver is only used by drivers converted
5 * to the bus-based I2C API.
6 *
7 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24/* NOTE: the full version of this header is in the v4l-dvb repository
25 * and allows v4l i2c drivers to be compiled on pre-2.6.26 kernels.
26 * The version of this header as it appears in the kernel is a stripped
27 * version (without all the backwards compatibility stuff) and so it
28 * looks a bit odd.
29 *
30 * If you look at the full version then you will understand the reason
31 * for introducing this header since you really don't want to have all
32 * the tricky backwards compatibility code in each and every i2c driver.
33 *
34 * If the i2c driver will never be compiled for pre-2.6.26 kernels, then
35 * DO NOT USE this header! Just write it as a regular i2c driver.
36 */
37
38#ifndef __V4L2_I2C_DRV_H__
39#define __V4L2_I2C_DRV_H__
40
41#include <media/v4l2-common.h>
42
43struct v4l2_i2c_driver_data {
44 const char * const name;
45 int (*command)(struct i2c_client *client, unsigned int cmd, void *arg);
46 int (*probe)(struct i2c_client *client, const struct i2c_device_id *id);
47 int (*remove)(struct i2c_client *client);
48 int (*suspend)(struct i2c_client *client, pm_message_t state);
49 int (*resume)(struct i2c_client *client);
50 const struct i2c_device_id *id_table;
51};
52
53static struct v4l2_i2c_driver_data v4l2_i2c_data;
54static struct i2c_driver v4l2_i2c_driver;
55
56
57/* Bus-based I2C implementation for kernels >= 2.6.26 */
58
59static int __init v4l2_i2c_drv_init(void)
60{
61 v4l2_i2c_driver.driver.name = v4l2_i2c_data.name;
62 v4l2_i2c_driver.command = v4l2_i2c_data.command;
63 v4l2_i2c_driver.probe = v4l2_i2c_data.probe;
64 v4l2_i2c_driver.remove = v4l2_i2c_data.remove;
65 v4l2_i2c_driver.suspend = v4l2_i2c_data.suspend;
66 v4l2_i2c_driver.resume = v4l2_i2c_data.resume;
67 v4l2_i2c_driver.id_table = v4l2_i2c_data.id_table;
68 return i2c_add_driver(&v4l2_i2c_driver);
69}
70
71
72static void __exit v4l2_i2c_drv_cleanup(void)
73{
74 i2c_del_driver(&v4l2_i2c_driver);
75}
76
77module_init(v4l2_i2c_drv_init);
78module_exit(v4l2_i2c_drv_cleanup);
79
80#endif /* __V4L2_I2C_DRV_H__ */