drivers/media/video/et61x251/et61x251_sensor.h

   1 /***************************************************************************
   2  * API for image sensors connected to ET61X[12]51 PC Camera Controllers    *
   3  *                                                                         *
   4  * Copyright (C) 2006-2007 by Luca Risolia <luca.risolia@studio.unibo.it>  *
   5  *                                                                         *
   6  * This program is free software; you can redistribute it and/or modify    *
   7  * it under the terms of the GNU General Public License as published by    *
   8  * the Free Software Foundation; either version 2 of the License, or       *
   9  * (at your option) any later version.                                     *
  10  *                                                                         *
  11  * This program is distributed in the hope that it will be useful,         *
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
  14  * GNU General Public License for more details.                            *
  15  *                                                                         *
  16  * You should have received a copy of the GNU General Public License       *
  17  * along with this program; if not, write to the Free Software             *
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.               *
  19  ***************************************************************************/
  20
  21 #ifndef _ET61X251_SENSOR_H_
  22 #define _ET61X251_SENSOR_H_
  23
  24 #include <linux/usb.h>
  25 #include <linux/videodev2.h>
  26 #include <linux/device.h>
  27 #include <linux/stddef.h>
  28 #include <linux/errno.h>
  29 #include <asm/types.h>
  30
  31 struct et61x251_device;
  32 struct et61x251_sensor;
  33
  34 /*****************************************************************************/
  35
  36 extern int et61x251_probe_tas5130d1b(struct et61x251_device* cam);
  37
  38 #define ET61X251_SENSOR_TABLE                                                 \
  39 /* Weak detections must go at the end of the list */                          \
  40 static int (*et61x251_sensor_table[])(struct et61x251_device*) = {            \
  41         &et61x251_probe_tas5130d1b,                                           \
  42         NULL,                                                                 \
  43 };
  44
  45 extern struct et61x251_device*
  46 et61x251_match_id(struct et61x251_device* cam, const struct usb_device_id *id);
  47
  48 extern void
  49 et61x251_attach_sensor(struct et61x251_device* cam,
  50                        const struct et61x251_sensor* sensor);
  51
  52 /*****************************************************************************/
  53
  54 extern int et61x251_write_reg(struct et61x251_device*, u8 value, u16 index);
  55 extern int et61x251_i2c_raw_write(struct et61x251_device*, u8 n, u8 data1,
  56                                   u8 data2, u8 data3, u8 data4, u8 data5,
  57                                   u8 data6, u8 data7, u8 data8, u8 address);
  58
  59 /*****************************************************************************/
  60
  61 enum et61x251_i2c_sysfs_ops {
  62         ET61X251_I2C_READ = 0x01,
  63         ET61X251_I2C_WRITE = 0x02,
  64 };
  65
  66 enum et61x251_i2c_interface {
  67         ET61X251_I2C_2WIRES,
  68         ET61X251_I2C_3WIRES,
  69 };
  70
  71 /* Repeat start condition when RSTA is high */
  72 enum et61x251_i2c_rsta {
  73         ET61X251_I2C_RSTA_STOP = 0x00, /* stop then start */
  74         ET61X251_I2C_RSTA_REPEAT = 0x01, /* repeat start */
  75 };
  76
  77 #define ET61X251_MAX_CTRLS (V4L2_CID_LASTP1-V4L2_CID_BASE+10)
  78
  79 struct et61x251_sensor {
  80         char name[32];
  81
  82         enum et61x251_i2c_sysfs_ops sysfs_ops;
  83
  84         enum et61x251_i2c_interface interface;
  85         u8 i2c_slave_id;
  86         enum et61x251_i2c_rsta rsta;
  87         struct v4l2_rect active_pixel; /* left and top define FVSX and FVSY */
  88
  89         struct v4l2_queryctrl qctrl[ET61X251_MAX_CTRLS];
  90         struct v4l2_cropcap cropcap;
  91         struct v4l2_pix_format pix_format;
  92
  93         int (*init)(struct et61x251_device* cam);
  94         int (*get_ctrl)(struct et61x251_device* cam,
  95                         struct v4l2_control* ctrl);
  96         int (*set_ctrl)(struct et61x251_device* cam,
  97                         const struct v4l2_control* ctrl);
  98         int (*set_crop)(struct et61x251_device* cam,
  99                         const struct v4l2_rect* rect);
 100         int (*set_pix_format)(struct et61x251_device* cam,
 101                               const struct v4l2_pix_format* pix);
 102
 103         /* Private */
 104         struct v4l2_queryctrl _qctrl[ET61X251_MAX_CTRLS];
 105         struct v4l2_rect _rect;
 106 };
 107
 108 #endif /* _ET61X251_SENSOR_H_ */