drivers/usb/media/sn9c102_pas202bcb.c

   1 /***************************************************************************
   2  * Plug-in for PAS202BCB image sensor connected to the SN9C10x 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  * DAC Magnitude, exposure and green gain controls added by                *
  10  * Luca Risolia <luca.risolia@studio.unibo.it>                             *
  11  *                                                                         *
  12  * This program is free software; you can redistribute it and/or modify    *
  13  * it under the terms of the GNU General Public License as published by    *
  14  * the Free Software Foundation; either version 2 of the License, or       *
  15  * (at your option) any later version.                                     *
  16  *                                                                         *
  17  * This program is distributed in the hope that it will be useful,         *
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
  20  * GNU General Public License for more details.                            *
  21  *                                                                         *
  22  * You should have received a copy of the GNU General Public License       *
  23  * along with this program; if not, write to the Free Software             *
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.               *
  25  ***************************************************************************/
  26
  27 #include <linux/delay.h>
  28 #include "sn9c102_sensor.h"
  29
  30
  31 static struct sn9c102_sensor pas202bcb;
  32
  33
  34 static int pas202bcb_init(struct sn9c102_device* cam)
  35 {
  36         int err = 0;
  37
  38         err += sn9c102_write_reg(cam, 0x00, 0x10);
  39         err += sn9c102_write_reg(cam, 0x00, 0x11);
  40         err += sn9c102_write_reg(cam, 0x00, 0x14);
  41         err += sn9c102_write_reg(cam, 0x20, 0x17);
  42         err += sn9c102_write_reg(cam, 0x30, 0x19);
  43         err += sn9c102_write_reg(cam, 0x09, 0x18);
  44
  45         err += sn9c102_i2c_write(cam, 0x02, 0x14);
  46         err += sn9c102_i2c_write(cam, 0x03, 0x40);
  47         err += sn9c102_i2c_write(cam, 0x0d, 0x2c);
  48         err += sn9c102_i2c_write(cam, 0x0e, 0x01);
  49         err += sn9c102_i2c_write(cam, 0x0f, 0xa9);
  50         err += sn9c102_i2c_write(cam, 0x10, 0x08);
  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_EXPOSURE:
  66                 {
  67                         int r1 = sn9c102_i2c_read(cam, 0x04),
  68                             r2 = sn9c102_i2c_read(cam, 0x05);
  69                         if (r1 < 0 || r2 < 0)
  70                                 return -EIO;
  71                         ctrl->value = (r1 << 6) | (r2 & 0x3f);
  72                 }
  73                 return 0;
  74         case V4L2_CID_RED_BALANCE:
  75                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x09)) < 0)
  76                         return -EIO;
  77                 ctrl->value &= 0x0f;
  78                 return 0;
  79         case V4L2_CID_BLUE_BALANCE:
  80                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x07)) < 0)
  81                         return -EIO;
  82                 ctrl->value &= 0x0f;
  83                 return 0;
  84         case V4L2_CID_GAIN:
  85                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x10)) < 0)
  86                         return -EIO;
  87                 ctrl->value &= 0x1f;
  88                 return 0;
  89         case SN9C102_V4L2_CID_GREEN_BALANCE:
  90                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x08)) < 0)
  91                         return -EIO;
  92                 ctrl->value &= 0x0f;
  93                 return 0;
  94         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
  95                 if ((ctrl->value = sn9c102_i2c_read(cam, 0x0c)) < 0)
  96                         return -EIO;
  97                 return 0;
  98         default:
  99                 return -EINVAL;
 100         }
 101 }
 102
 103
 104 static int pas202bcb_set_pix_format(struct sn9c102_device* cam,
 105                                     const struct v4l2_pix_format* pix)
 106 {
 107         int err = 0;
 108
 109         if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
 110                 err += sn9c102_write_reg(cam, 0x24, 0x17);
 111         else
 112                 err += sn9c102_write_reg(cam, 0x20, 0x17);
 113
 114         return err;
 115 }
 116
 117
 118 static int pas202bcb_set_ctrl(struct sn9c102_device* cam,
 119                               const struct v4l2_control* ctrl)
 120 {
 121         int err = 0;
 122
 123         switch (ctrl->id) {
 124         case V4L2_CID_EXPOSURE:
 125                 err += sn9c102_i2c_write(cam, 0x04, ctrl->value >> 6);
 126                 err += sn9c102_i2c_write(cam, 0x05, ctrl->value & 0x3f);
 127                 break;
 128         case V4L2_CID_RED_BALANCE:
 129                 err += sn9c102_i2c_write(cam, 0x09, ctrl->value);
 130                 break;
 131         case V4L2_CID_BLUE_BALANCE:
 132                 err += sn9c102_i2c_write(cam, 0x07, ctrl->value);
 133                 break;
 134         case V4L2_CID_GAIN:
 135                 err += sn9c102_i2c_write(cam, 0x10, ctrl->value);
 136                 break;
 137         case SN9C102_V4L2_CID_GREEN_BALANCE:
 138                 err += sn9c102_i2c_write(cam, 0x08, ctrl->value);
 139                 break;
 140         case SN9C102_V4L2_CID_DAC_MAGNITUDE:
 141                 err += sn9c102_i2c_write(cam, 0x0c, ctrl->value);
 142                 break;
 143         default:
 144                 return -EINVAL;
 145         }
 146         err += sn9c102_i2c_write(cam, 0x11, 0x01);
 147
 148         return err ? -EIO : 0;
 149 }
 150
 151
 152 static int pas202bcb_set_crop(struct sn9c102_device* cam,
 153                               const struct v4l2_rect* rect)
 154 {
 155         struct sn9c102_sensor* s = &pas202bcb;
 156         int err = 0;
 157         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 4,
 158            v_start = (u8)(rect->top - s->cropcap.bounds.top) + 3;
 159
 160         err += sn9c102_write_reg(cam, h_start, 0x12);
 161         err += sn9c102_write_reg(cam, v_start, 0x13);
 162
 163         return err;
 164 }
 165
 166
 167 static struct sn9c102_sensor pas202bcb = {
 168         .name = "PAS202BCB",
 169         .maintainer = "Carlos Eduardo Medaglia Dyonisio "
 170                       "<medaglia@undl.org.br>",
 171         .sysfs_ops = SN9C102_I2C_READ | SN9C102_I2C_WRITE,
 172         .frequency = SN9C102_I2C_400KHZ | SN9C102_I2C_100KHZ,
 173         .interface = SN9C102_I2C_2WIRES,
 174         .i2c_slave_id = 0x40,
 175         .init = &pas202bcb_init,
 176         .qctrl = {
 177                 {
 178                         .id = V4L2_CID_EXPOSURE,
 179                         .type = V4L2_CTRL_TYPE_INTEGER,
 180                         .name = "exposure",
 181                         .minimum = 0x01e5,
 182                         .maximum = 0x3fff,
 183                         .step = 0x0001,
 184                         .default_value = 0x01e5,
 185                         .flags = 0,
 186                 },
 187                 {
 188                         .id = V4L2_CID_GAIN,
 189                         .type = V4L2_CTRL_TYPE_INTEGER,
 190                         .name = "global gain",
 191                         .minimum = 0x00,
 192                         .maximum = 0x1f,
 193                         .step = 0x01,
 194                         .default_value = 0x0c,
 195                         .flags = 0,
 196                 },
 197                 {
 198                         .id = V4L2_CID_RED_BALANCE,
 199                         .type = V4L2_CTRL_TYPE_INTEGER,
 200                         .name = "red balance",
 201                         .minimum = 0x00,
 202                         .maximum = 0x0f,
 203                         .step = 0x01,
 204                         .default_value = 0x01,
 205                         .flags = 0,
 206                 },
 207                 {
 208                         .id = V4L2_CID_BLUE_BALANCE,
 209                         .type = V4L2_CTRL_TYPE_INTEGER,
 210                         .name = "blue balance",
 211                         .minimum = 0x00,
 212                         .maximum = 0x0f,
 213                         .step = 0x01,
 214                         .default_value = 0x05,
 215                         .flags = 0,
 216                 },
 217                 {
 218                         .id = SN9C102_V4L2_CID_GREEN_BALANCE,
 219                         .type = V4L2_CTRL_TYPE_INTEGER,
 220                         .name = "green balance",
 221                         .minimum = 0x00,
 222                         .maximum = 0x0f,
 223                         .step = 0x01,
 224                         .default_value = 0x00,
 225                         .flags = 0,
 226                 },
 227                 {
 228                         .id = SN9C102_V4L2_CID_DAC_MAGNITUDE,
 229                         .type = V4L2_CTRL_TYPE_INTEGER,
 230                         .name = "DAC magnitude",
 231                         .minimum = 0x00,
 232                         .maximum = 0xff,
 233                         .step = 0x01,
 234                         .default_value = 0x04,
 235                         .flags = 0,
 236                 },
 237         },
 238         .get_ctrl = &pas202bcb_get_ctrl,
 239         .set_ctrl = &pas202bcb_set_ctrl,
 240         .cropcap = {
 241                 .bounds = {
 242                         .left = 0,
 243                         .top = 0,
 244                         .width = 640,
 245                         .height = 480,
 246                 },
 247                 .defrect = {
 248                         .left = 0,
 249                         .top = 0,
 250                         .width = 640,
 251                         .height = 480,
 252                 },
 253         },
 254         .set_crop = &pas202bcb_set_crop,
 255         .pix_format = {
 256                 .width = 640,
 257                 .height = 480,
 258                 .pixelformat = V4L2_PIX_FMT_SBGGR8,
 259                 .priv = 8,
 260         },
 261         .set_pix_format = &pas202bcb_set_pix_format
 262 };
 263
 264
 265 int sn9c102_probe_pas202bcb(struct sn9c102_device* cam)
 266 {
 267         int r0 = 0, r1 = 0, err = 0;
 268         unsigned int pid = 0;
 269
 270         /*
 271          *  Minimal initialization to enable the I2C communication
 272          *  NOTE: do NOT change the values!
 273          */
 274         err += sn9c102_write_reg(cam, 0x01, 0x01); /* sensor power down */
 275         err += sn9c102_write_reg(cam, 0x40, 0x01); /* sensor power on */
 276         err += sn9c102_write_reg(cam, 0x28, 0x17); /* sensor clock at 24 MHz */
 277         if (err)
 278                 return -EIO;
 279
 280         r0 = sn9c102_i2c_try_read(cam, &pas202bcb, 0x00);
 281         r1 = sn9c102_i2c_try_read(cam, &pas202bcb, 0x01);
 282
 283         if (r0 < 0 || r1 < 0)
 284                 return -EIO;
 285
 286         pid = (r0 << 4) | ((r1 & 0xf0) >> 4);
 287         if (pid != 0x017)
 288                 return -ENODEV;
 289
 290         sn9c102_attach_sensor(cam, &pas202bcb);
 291
 292         return 0;
 293 }