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/videodev.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                        struct et61x251_sensor* sensor);
  51
  52 /*****************************************************************************/
  53
  54 extern int et61x251_write_reg(struct et61x251_device*, u8 value, u16 index);
  55 extern int et61x251_read_reg(struct et61x251_device*, u16 index);
  56 extern int et61x251_i2c_write(struct et61x251_device*, u8 address, u8 value);
  57 extern int et61x251_i2c_read(struct et61x251_device*, u8 address);
  58 extern int et61x251_i2c_try_write(struct et61x251_device*,
  59                                   struct et61x251_sensor*, u8 address,
  60                                   u8 value);
  61 extern int et61x251_i2c_try_read(struct et61x251_device*,
  62                                  struct et61x251_sensor*, u8 address);
  63 extern int et61x251_i2c_raw_write(struct et61x251_device*, u8 n, u8 data1,
  64                                   u8 data2, u8 data3, u8 data4, u8 data5,
  65                                   u8 data6, u8 data7, u8 data8, u8 address);
  66
  67 /*****************************************************************************/
  68
  69 enum et61x251_i2c_sysfs_ops {
  70         ET61X251_I2C_READ = 0x01,
  71         ET61X251_I2C_WRITE = 0x02,
  72 };
  73
  74 enum et61x251_i2c_interface {
  75         ET61X251_I2C_2WIRES,
  76         ET61X251_I2C_3WIRES,
  77 };
  78
  79 /* Repeat start condition when RSTA is high */
  80 enum et61x251_i2c_rsta {
  81         ET61X251_I2C_RSTA_STOP = 0x00, /* stop then start */
  82         ET61X251_I2C_RSTA_REPEAT = 0x01, /* repeat start */
  83 };
  84
  85 #define ET61X251_MAX_CTRLS (V4L2_CID_LASTP1-V4L2_CID_BASE+10)
  86
  87 struct et61x251_sensor {
  88         char name[32];
  89
  90         enum et61x251_i2c_sysfs_ops sysfs_ops;
  91
  92         enum et61x251_i2c_interface interface;
  93         u8 i2c_slave_id;
  94         enum et61x251_i2c_rsta rsta;
  95         struct v4l2_rect active_pixel; /* left and top define FVSX and FVSY */
  96
  97         struct v4l2_queryctrl qctrl[ET61X251_MAX_CTRLS];
  98         struct v4l2_cropcap cropcap;
  99         struct v4l2_pix_format pix_format;
 100
 101         int (*init)(struct et61x251_device* cam);
 102         int (*get_ctrl)(struct et61x251_device* cam,
 103                         struct v4l2_control* ctrl);
 104         int (*set_ctrl)(struct et61x251_device* cam,
 105                         const struct v4l2_control* ctrl);
 106         int (*set_crop)(struct et61x251_device* cam,
 107                         const struct v4l2_rect* rect);
 108         int (*set_pix_format)(struct et61x251_device* cam,
 109                               const struct v4l2_pix_format* pix);
 110
 111         /* Private */
 112         struct v4l2_queryctrl _qctrl[ET61X251_MAX_CTRLS];
 113         struct v4l2_rect _rect;
 114 };
 115
 116 #endif /* _ET61X251_SENSOR_H_ */