drivers/usb/media/sn9c102_tas5130d1b.c

   1 /***************************************************************************
   2  * Plug-in for TAS5130D1B image sensor connected to the SN9C10x PC Camera  *
   3  * Controllers                                                             *
   4  *                                                                         *
   5  * Copyright (C) 2004 by Luca Risolia <luca.risolia@studio.unibo.it>       *
   6  *                                                                         *
   7  * This program is free software; you can redistribute it and/or modify    *
   8  * it under the terms of the GNU General Public License as published by    *
   9  * the Free Software Foundation; either version 2 of the License, or       *
  10  * (at your option) any later version.                                     *
  11  *                                                                         *
  12  * This program is distributed in the hope that it will be useful,         *
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
  15  * GNU General Public License for more details.                            *
  16  *                                                                         *
  17  * You should have received a copy of the GNU General Public License       *
  18  * along with this program; if not, write to the Free Software             *
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.               *
  20  ***************************************************************************/
  21
  22 #include "sn9c102_sensor.h"
  23
  24
  25 static struct sn9c102_sensor tas5130d1b;
  26
  27 static struct v4l2_control tas5130d1b_gain, tas5130d1b_exposure;
  28
  29
  30 static int tas5130d1b_init(struct sn9c102_device* cam)
  31 {
  32         int err = 0;
  33
  34         err += sn9c102_write_reg(cam, 0x01, 0x01);
  35         err += sn9c102_write_reg(cam, 0x20, 0x17);
  36         err += sn9c102_write_reg(cam, 0x04, 0x01);
  37         err += sn9c102_write_reg(cam, 0x01, 0x10);
  38         err += sn9c102_write_reg(cam, 0x00, 0x11);
  39         err += sn9c102_write_reg(cam, 0x00, 0x14);
  40         err += sn9c102_write_reg(cam, 0x60, 0x17);
  41         err += sn9c102_write_reg(cam, 0x07, 0x18);
  42
  43         return err;
  44 }
  45
  46
  47 static int tas5130d1b_get_ctrl(struct sn9c102_device* cam,
  48                                struct v4l2_control* ctrl)
  49 {
  50         switch (ctrl->id) {
  51         case V4L2_CID_GAIN:
  52                 ctrl->value = tas5130d1b_gain.value;
  53                 break;
  54         case V4L2_CID_EXPOSURE:
  55                 ctrl->value = tas5130d1b_exposure.value;
  56                 break;
  57         default:
  58                 return -EINVAL;
  59         }
  60
  61         return 0;
  62 }
  63
  64
  65 static int tas5130d1b_set_ctrl(struct sn9c102_device* cam,
  66                                const struct v4l2_control* ctrl)
  67 {
  68         int err = 0;
  69
  70         switch (ctrl->id) {
  71         case V4L2_CID_GAIN:
  72                 if (!(err += sn9c102_i2c_write(cam, 0x20, 0xf6 - ctrl->value)))
  73                         tas5130d1b_gain.value = ctrl->value;
  74                 break;
  75         case V4L2_CID_EXPOSURE:
  76                 if (!(err += sn9c102_i2c_write(cam, 0x40, 0x47 - ctrl->value)))
  77                         tas5130d1b_exposure.value = ctrl->value;
  78                 break;
  79         default:
  80                 return -EINVAL;
  81         }
  82
  83         return err ? -EIO : 0;
  84 }
  85
  86
  87 static int tas5130d1b_set_crop(struct sn9c102_device* cam,
  88                                const struct v4l2_rect* rect)
  89 {
  90         struct sn9c102_sensor* s = &tas5130d1b;
  91         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 104,
  92            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 12;
  93         int err = 0;
  94
  95         err += sn9c102_write_reg(cam, h_start, 0x12);
  96         err += sn9c102_write_reg(cam, v_start, 0x13);
  97
  98         /* Do NOT change! */
  99         err += sn9c102_write_reg(cam, 0x1f, 0x1a);
 100         err += sn9c102_write_reg(cam, 0x1a, 0x1b);
 101         err += sn9c102_write_reg(cam, 0xf3, 0x19);
 102
 103         return err;
 104 }
 105
 106
 107 static struct sn9c102_sensor tas5130d1b = {
 108         .name = "TAS5130D1B",
 109         .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
 110         .frequency = SN9C102_I2C_100KHZ,
 111         .interface = SN9C102_I2C_3WIRES,
 112         .slave_read_id = SN9C102_I2C_SLAVEID_UNAVAILABLE,
 113         .slave_write_id = SN9C102_I2C_SLAVEID_FICTITIOUS,
 114         .init = &tas5130d1b_init,
 115         .qctrl = {
 116                 {
 117                         .id = V4L2_CID_GAIN,
 118                         .type = V4L2_CTRL_TYPE_INTEGER,
 119                         .name = "global gain",
 120                         .minimum = 0x00,
 121                         .maximum = 0xf6,
 122                         .step = 0x02,
 123                         .default_value = 0x00,
 124                         .flags = 0,
 125                 },
 126                 {
 127                         .id = V4L2_CID_EXPOSURE,
 128                         .type = V4L2_CTRL_TYPE_INTEGER,
 129                         .name = "exposure",
 130                         .minimum = 0x00,
 131                         .maximum = 0x47,
 132                         .step = 0x01,
 133                         .default_value = 0x00,
 134                         .flags = 0,
 135                 },
 136         },
 137         .get_ctrl = &tas5130d1b_get_ctrl,
 138         .set_ctrl = &tas5130d1b_set_ctrl,
 139         .cropcap = {
 140                 .bounds = {
 141                         .left = 0,
 142                         .top = 0,
 143                         .width = 640,
 144                         .height = 480,
 145                 },
 146                 .defrect = {
 147                         .left = 0,
 148                         .top = 0,
 149                         .width = 640,
 150                         .height = 480,
 151                 },
 152         },
 153         .set_crop = &tas5130d1b_set_crop,
 154         .pix_format = {
 155                 .width = 640,
 156                 .height = 480,
 157                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 158                 .priv = 8,
 159         }
 160 };
 161
 162
 163 int sn9c102_probe_tas5130d1b(struct sn9c102_device* cam)
 164 {
 165         /* This sensor has no identifiers, so let's attach it anyway */
 166         sn9c102_attach_sensor(cam, &tas5130d1b);
 167
 168         /* Sensor detection is based on USB pid/vid */
 169         if (tas5130d1b.usbdev->descriptor.idProduct != 0x6025 &&
 170             tas5130d1b.usbdev->descriptor.idProduct != 0x60aa)
 171                 return -ENODEV;
 172
 173         return 0;
 174 }