drivers/usb/media/sn9c102_pas202bcb.c

   1 /***************************************************************************
   2  * Driver for PAS202BCB image sensor connected to the SN9C10[12] PC Camera *
   3  * Controllers                                                             *
   4  *                                                                         *
   5  * Copyright (C) 2004 by Carlos Eduardo Medaglia Dyonisio                  *
   6  *                       <medaglia@undl.org.br>                            *
   7  *                       http://cadu.homelinux.com:8080/                   *
   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 #include <linux/delay.h>
  25 #include "sn9c102_sensor.h"
  26
  27
  28 static struct sn9c102_sensor pas202bcb;
  29
  30
  31 static int pas202bcb_init(struct sn9c102_device* cam)
  32 {
  33         int err = 0;
  34
  35         err += sn9c102_write_reg(cam, 0x00, 0x10);
  36         err += sn9c102_write_reg(cam, 0x00, 0x11);
  37         err += sn9c102_write_reg(cam, 0x00, 0x14);
  38         err += sn9c102_write_reg(cam, 0x20, 0x17);
  39         err += sn9c102_write_reg(cam, 0x20, 0x19);
  40         err += sn9c102_write_reg(cam, 0x09, 0x18);
  41
  42         err += sn9c102_i2c_write(cam, 0x02, 0x0c);
  43         err += sn9c102_i2c_write(cam, 0x03, 0x40);
  44         err += sn9c102_i2c_write(cam, 0x04, 0x07);
  45         err += sn9c102_i2c_write(cam, 0x05, 0x25);
  46         err += sn9c102_i2c_write(cam, 0x0d, 0x2c);
  47         err += sn9c102_i2c_write(cam, 0x0e, 0x01);
  48         err += sn9c102_i2c_write(cam, 0x0f, 0xa9);
  49         err += sn9c102_i2c_write(cam, 0x08, 0x01);
  50         err += sn9c102_i2c_write(cam, 0x0b, 0x01);
  51         err += sn9c102_i2c_write(cam, 0x13, 0x63);
  52         err += sn9c102_i2c_write(cam, 0x15, 0x70);
  53         err += sn9c102_i2c_write(cam, 0x11, 0x01);
  54
  55         msleep(400);
  56
  57         return err;
  58 }
  59
  60
  61 static int pas202bcb_get_ctrl(struct sn9c102_device* cam,
  62                               struct v4l2_control* ctrl)
  63 {
  64         switch (ctrl->id) {
  65         case V4L2_CID_RED_BALANCE:
  66                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
  67                         return -EIO;
  68                 ctrl->value &= 0x0f;
  69                 return 0;
  70         case V4L2_CID_BLUE_BALANCE:
  71                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x07)) < 0)
  72                         return -EIO;
  73                 ctrl->value &= 0x0f;
  74                 return 0;
  75         case V4L2_CID_GAIN:
  76                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x10)) < 0)
  77                         return -EIO;
  78                 ctrl->value &= 0x1f;
  79                 return 0;
  80         case V4L2_CID_BRIGHTNESS:
  81                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x06)) < 0)
  82                         return -EIO;
  83                 ctrl->value &= 0x0f;
  84                 return 0;
  85         default:
  86                 return -EINVAL;
  87         }
  88 }
  89
  90
  91 static int pas202bcb_set_ctrl(struct sn9c102_device* cam,
  92                               const struct v4l2_control* ctrl)
  93 {
  94         int err = 0;
  95
  96         switch (ctrl->id) {
  97         case V4L2_CID_RED_BALANCE:
  98                 err += sn9c102_i2c_write(cam, 0x09, ctrl->value & 0x0f);
  99                 break;
 100         case V4L2_CID_BLUE_BALANCE:
 101                 err += sn9c102_i2c_write(cam, 0x07, ctrl->value & 0x0f);
 102                 break;
 103         case V4L2_CID_GAIN:
 104                 err += sn9c102_i2c_write(cam, 0x10, ctrl->value & 0x1f);
 105                 break;
 106         case V4L2_CID_BRIGHTNESS:
 107                 err += sn9c102_i2c_write(cam, 0x06, 0x0f-(ctrl->value & 0x0f));
 108                 break;
 109         default:
 110                 return -EINVAL;
 111         }
 112         err += sn9c102_i2c_write(cam, 0x11, 0x01);
 113
 114         return err;
 115 }
 116
 117
 118 static int pas202bcb_set_crop(struct sn9c102_device* cam,
 119                               const struct v4l2_rect* rect)
 120 {
 121         struct sn9c102_sensor* s = &pas202bcb;
 122         int err = 0;
 123         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4,
 124            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
 125
 126         err += sn9c102_write_reg(cam, h_start, 0x12);
 127         err += sn9c102_write_reg(cam, v_start, 0x13);
 128
 129         return err;
 130 }
 131
 132
 133 static struct sn9c102_sensor pas202bcb = {
 134         .name = "PAS202BCB",
 135         .maintainer = "Carlos Eduardo Medaglia Dyonisio "
 136                       "<medaglia@undl.org.br>",
 137         .frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
 138         .interface = SN9C102_I2C_2WIRES,
 139         .slave_read_id = 0x40,
 140         .slave_write_id = 0x40,
 141         .init = &pas202bcb_init,
 142         .qctrl = {
 143                 {
 144                         .id = V4L2_CID_RED_BALANCE,
 145                         .type = V4L2_CTRL_TYPE_INTEGER,
 146                         .name = "red balance",
 147                         .minimum = 0x00,
 148                         .maximum = 0x0f,
 149                         .step = 0x01,
 150                         .default_value = 0x01,
 151                         .flags = 0,
 152                 },
 153                 {
 154                         .id = V4L2_CID_BLUE_BALANCE,
 155                         .type = V4L2_CTRL_TYPE_INTEGER,
 156                         .name = "blue balance",
 157                         .minimum = 0x00,
 158                         .maximum = 0x0f,
 159                         .step = 0x01,
 160                         .default_value = 0x05,
 161                         .flags = 0,
 162                 },
 163                 {
 164                         .id = V4L2_CID_GAIN,
 165                         .type = V4L2_CTRL_TYPE_INTEGER,
 166                         .name = "global gain",
 167                         .minimum = 0x00,
 168                         .maximum = 0x1f,
 169                         .step = 0x01,
 170                         .default_value = 0x0c,
 171                         .flags = 0,
 172                 },
 173                 {
 174                         .id = V4L2_CID_BRIGHTNESS,
 175                         .type = V4L2_CTRL_TYPE_INTEGER,
 176                         .name = "brightness",
 177                         .minimum = 0x00,
 178                         .maximum = 0x0f,
 179                         .step = 0x01,
 180                         .default_value = 0x0f,
 181                         .flags = 0,
 182                 },
 183         },
 184         .get_ctrl = &pas202bcb_get_ctrl,
 185         .set_ctrl = &pas202bcb_set_ctrl,
 186         .cropcap = {
 187                 .bounds = {
 188                         .left = 0,
 189                         .top = 0,
 190                         .width = 640,
 191                         .height = 480,
 192                 },
 193                 .defrect = {
 194                         .left = 0,
 195                         .top = 0,
 196                         .width = 640,
 197                         .height = 480,
 198                 },
 199         },
 200         .set_crop = &pas202bcb_set_crop,
 201         .pix_format = {
 202                 .width = 640,
 203                 .height = 480,
 204                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 205                 .priv = 8,
 206         }
 207 };
 208
 209
 210 int sn9c102_probe_pas202bcb(struct sn9c102_device* cam)
 211 {
 212         int r0 = 0, r1 = 0, err = 0;
 213         unsigned int pid = 0;
 214
 215         /*
 216          *  Minimal initialization to enable the I2C communication
 217          *  NOTE: do NOT change the values!
 218          */
 219         err += sn9c102_write_reg(cam, 0x01, 0x01); /* sensor power down */
 220         err += sn9c102_write_reg(cam, 0x00, 0x01); /* sensor power on */
 221         err += sn9c102_write_reg(cam, 0x28, 0x17); /* sensor clock at 24 MHz */
 222         if (err)
 223                 return -EIO;
 224
 225         r0 = sn9c102_i2c_try_read(cam, &pas202bcb, 0x00);
 226         r1 = sn9c102_i2c_try_read(cam, &pas202bcb, 0x01);
 227
 228         if (r0 < 0 || r1 < 0)
 229                 return -EIO;
 230
 231         pid = (r0 << 4) | ((r1 & 0xf0) >> 4);
 232         if (pid != 0x017)
 233                 return -ENODEV;
 234
 235         sn9c102_attach_sensor(cam, &pas202bcb);
 236
 237         return 0;
 238 }