include/media/v4l2-i2c-drv.h

   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 #ifndef __V4L2_I2C_DRV_H__
  25 #define __V4L2_I2C_DRV_H__
  26
  27 #include <media/v4l2-common.h>
  28
  29 struct v4l2_i2c_driver_data {
  30         const char * const name;
  31         int driverid;
  32         int (*command)(struct i2c_client *client, unsigned int cmd, void *arg);
  33         int (*probe)(struct i2c_client *client);
  34         int (*remove)(struct i2c_client *client);
  35         int (*suspend)(struct i2c_client *client, pm_message_t state);
  36         int (*resume)(struct i2c_client *client);
  37         int (*legacy_probe)(struct i2c_adapter *adapter);
  38         int legacy_class;
  39 };
  40
  41 static struct v4l2_i2c_driver_data v4l2_i2c_data;
  42 static struct i2c_driver v4l2_i2c_driver;
  43
  44
  45 /* Bus-based I2C implementation for kernels >= 2.6.22 */
  46
  47 static int __init v4l2_i2c_drv_init(void)
  48 {
  49         v4l2_i2c_driver.driver.name = v4l2_i2c_data.name;
  50         v4l2_i2c_driver.id = v4l2_i2c_data.driverid;
  51         v4l2_i2c_driver.command = v4l2_i2c_data.command;
  52         v4l2_i2c_driver.probe = v4l2_i2c_data.probe;
  53         v4l2_i2c_driver.remove = v4l2_i2c_data.remove;
  54         v4l2_i2c_driver.suspend = v4l2_i2c_data.suspend;
  55         v4l2_i2c_driver.resume = v4l2_i2c_data.resume;
  56         return i2c_add_driver(&v4l2_i2c_driver);
  57 }
  58
  59
  60 static void __exit v4l2_i2c_drv_cleanup(void)
  61 {
  62         i2c_del_driver(&v4l2_i2c_driver);
  63 }
  64
  65 module_init(v4l2_i2c_drv_init);
  66 module_exit(v4l2_i2c_drv_cleanup);
  67
  68 #endif /* __V4L2_I2C_DRV_H__ */