sn9c20x-dev.c

   1 /**
   2  * @file sn9c20x-dev.c
   3  * @author Nicolas VIVIEN
   4  * @date 2008-02-01
   5  *
   6  * @brief Device specific functions
   7  *
   8  * @note Copyright (C) Nicolas VIVIEN
   9  *
  10  * @par Licences
  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  * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  */
  26
  27 #include <linux/errno.h>
  28 #include <linux/string.h>
  29 #include <stdarg.h>
  30
  31 #include "sn9c20x.h"
  32 #include "sn9c20x-bridge.h"
  33 #include "omnivision.h"
  34 #include "micron.h"
  35
  36 int (*sn_probes[])(struct usb_sn9c20x *dev) = {
  37         mt9v011_probe,
  38         mt9v111_probe,
  39         mt9v112_probe,
  40 };
  41
  42 struct sn9c20x_video_mode sn9c20x_modes[SN9C20X_N_MODES] = {
  43         {
  44                 .width = 128,
  45                 .height = 96,
  46                 .scale = SN9C20X_1_4_SCALE,
  47                 .window = {65, 48, 1024, 768}
  48         },
  49         {
  50                 .width = 160,
  51                 .height = 120,
  52                 .scale = SN9C20X_1_4_SCALE,
  53                 .window = {0, 0, 640, 480}
  54         },
  55         {
  56                 .width = 176,
  57                 .height = 144,
  58                 .scale = SN9C20X_1_2_SCALE,
  59                 .window = {145, 96, 704, 576}
  60         },
  61         {
  62                 .width = 320,
  63                 .height = 240,
  64                 .scale = SN9C20X_1_2_SCALE,
  65                 .window = {0, 0, 640, 480}
  66         },
  67         {
  68                 .width = 352,
  69                 .height = 288,
  70                 .scale = SN9C20X_NO_SCALE,
  71                 .window = {145, 96, 704, 576}
  72         },
  73         {
  74                 .width = 640,
  75                 .height = 480,
  76                 .scale = SN9C20X_NO_SCALE,
  77                 .window = {0, 0, 640, 480}
  78         },
  79 };
  80
  81 struct sn9c20x_video_format sn9c20x_fmts[SN9C20X_N_FMTS] = {
  82         {
  83                 .pix_fmt = V4L2_PIX_FMT_SN9C20X_I420,
  84                 .desc = "SN9C20X I420 (YUV 4:2:0)",
  85                 .depth = 12,
  86                 .set_format = sn9c20x_set_yuv420,
  87         },
  88         {
  89                 .pix_fmt = V4L2_PIX_FMT_SBGGR8,
  90                 .desc = "Bayer 8bit (BGGR)",
  91                 .depth = 8,
  92                 .set_format = sn9c20x_set_raw,
  93         },
  94 /*
  95         {
  96                 .pix_fmt = V4L2_PIX_FMT_YUYV,
  97                 .desc = "YUYV (YUV 4:2:0)",
  98                 .depth = 16,
  99                 .set_format = sn9c20x_set_yuv422,
 100         },
 101 */
 102         {
 103                 .pix_fmt = V4L2_PIX_FMT_JPEG,
 104                 .desc = "JPEG (YUV 4:2:2)",
 105                 .depth = 16,
 106                 .set_format = sn9c20x_set_jpeg,
 107         },
 108 };
 109
 110 int sn9c20x_initialize_sensor(struct usb_sn9c20x *dev)
 111 {
 112         int ret = 0;
 113         int i;
 114
 115         dev->camera.min_yavg = 60;
 116         dev->camera.max_yavg = 150;
 117         dev->camera.min_stable_yavg = 70;
 118         dev->camera.max_stable_yavg = 140;
 119         dev->camera.old_yavg = -1;
 120
 121         /* Probe sensor first if sensor set to probe*/
 122         if (dev->camera.sensor == PROBE_SENSOR) {
 123                 for (i = 0; i < ARRAY_SIZE(sn_probes); i++) {
 124                         ret = sn_probes[i](dev);
 125                         dev->camera.sensor = ret;
 126                         if (ret > 0)
 127                                 break;
 128                 }
 129         }
 130
 131         switch (dev->camera.sensor) {
 132         case SOI968_SENSOR:
 133                 sn9c20x_write_i2c_array(dev, soi968_init, 0);
 134                 dev->camera.set_exposure = soi968_set_exposure;
 135                 dev->camera.set_auto_exposure = soi968_set_autoexposure;
 136                 dev->camera.set_gain = soi968_set_gain;
 137                 dev->camera.set_auto_gain = ov_set_autogain;
 138                 dev->camera.button_detect = soi968_button_detect;
 139                 dev->camera.hstart = 60;
 140                 dev->camera.vstart = 11;
 141                 UDIA_INFO("Detected SOI968 Sensor.\n");
 142                 break;
 143         case OV9650_SENSOR:
 144                 sn9c20x_write_i2c_array(dev, ov9650_init, 0);
 145                 dev->camera.hstart = 1;
 146                 dev->camera.vstart = 7;
 147                 dev->camera.set_hvflip = ov965x_set_hvflip;
 148                 dev->camera.set_exposure = ov_set_exposure;
 149                 dev->camera.set_auto_gain = ov_set_autogain;
 150                 dev->camera.set_gain = ov9650_set_gain;
 151                 dev->camera.flip_detect = ov965x_flip_detect;
 152                 UDIA_INFO("Detected OV9650 Sensor.\n");
 153                 break;
 154         case OV9655_SENSOR:
 155                 sn9c20x_write_i2c_array(dev, ov9655_init, 0);
 156                 dev->camera.set_exposure = ov_set_exposure;
 157                 dev->camera.set_auto_gain = ov_set_autogain;
 158                 dev->camera.hstart = 0;
 159                 dev->camera.vstart = 7;
 160                 UDIA_INFO("Detected OV9655 Sensor.\n");
 161                 break;
 162         case OV7670_SENSOR:
 163                 sn9c20x_write_i2c_array(dev, ov7670_init, 0);
 164                 dev->camera.set_exposure = ov_set_exposure;
 165                 dev->camera.set_auto_gain = ov_set_autogain;
 166                 dev->camera.flip_detect = ov7670_flip_detect;
 167                 dev->camera.hstart = 0;
 168                 dev->camera.vstart = 1;
 169                 UDIA_INFO("Detected OV7670 Sensor.\n");
 170                 break;
 171         case OV7660_SENSOR:
 172                 sn9c20x_write_i2c_array(dev, ov7660_init, 0);
 173                 dev->camera.set_exposure = ov_set_exposure;
 174                 dev->camera.set_auto_gain = ov_set_autogain;
 175                 dev->camera.hstart = 1;
 176                 dev->camera.vstart = 1;
 177                 UDIA_INFO("Detected OV7660 Sensor.\n");
 178                 break;
 179         case MT9V111_SENSOR:
 180                 sn9c20x_write_i2c_array(dev, mt9v111_init, 1);
 181                 dev->camera.set_hvflip = mt9v111_set_hvflip;
 182                 dev->camera.set_exposure = mt9v111_set_exposure;
 183                 dev->camera.set_auto_exposure = mt9v111_set_autoexposure;
 184                 dev->camera.hstart = 2;
 185                 dev->camera.vstart = 2;
 186                 UDIA_INFO("Detected MT9V111 Sensor.\n");
 187                 break;
 188         case MT9V112_SENSOR:
 189                 sn9c20x_write_i2c_array(dev, mt9v112_init, 1);
 190                 dev->camera.hstart = 6;
 191                 dev->camera.vstart = 2;
 192                 UDIA_INFO("Detected MT9V112 Sensor.\n");
 193                 break;
 194         case MT9M111_SENSOR:
 195                 sn9c20x_write_i2c_array(dev, mt9m111_init, 1);
 196                 dev->camera.hstart = 6;
 197                 dev->camera.vstart = 2;
 198                 UDIA_INFO("Detected MT9M111 Sensor.\n");
 199                 break;
 200         case MT9V011_SENSOR:
 201                 sn9c20x_write_i2c_array(dev, mt9v011_init, 1);
 202                 dev->camera.set_hvflip = mt9v011_set_hvflip;
 203                 dev->camera.set_exposure = mt9v011_set_exposure;
 204                 dev->camera.hstart = 2;
 205                 dev->camera.vstart = 2;
 206                 UDIA_INFO("Detected MT9V011 Sensor.\n");
 207                 break;
 208         case MT9M001_SENSOR:
 209                 sn9c20x_write_i2c_array(dev, mt9m001_init, 1);
 210                 dev->camera.hstart = 2;
 211                 dev->camera.vstart = 2;
 212                 UDIA_INFO("Detected MT9M001 Sensor.\n");
 213                 break;
 214         case HV7131R_SENSOR:
 215                 dev->camera.i2c_flags |= SN9C20X_I2C_400KHZ;
 216                 sn9c20x_write_i2c_array(dev, hv7131r_init, 0);
 217                 dev->camera.set_hvflip = hv7131r_set_hvflip;
 218                 dev->camera.set_gain = hv7131r_set_gain;
 219                 dev->camera.set_exposure = hv7131r_set_exposure;
 220                 dev->camera.hstart = 0;
 221                 dev->camera.vstart = 1;
 222                 UDIA_INFO("Detected HV7131R Sensor.\n");
 223                 break;
 224         default:
 225                 ret = -EINVAL;
 226                 UDIA_INFO("Unsupported sensor.\n");
 227         }
 228         return ret;
 229 }
 230
 231
 232 /**
 233  * @brief Wrapper function to detect hardware states
 234  *
 235  * @param dev Pointer to device structure
 236  *
 237  * @returns 0
 238  */
 239 int dev_sn9c20x_call_constantly(struct usb_sn9c20x *dev)
 240 {
 241
 242         /* Know to be broken, temporarely disabled */
 243         /*dev_sn9c20x_flip_detection(dev);*/
 244         dev_sn9c20x_button_detection(dev);
 245         if (!dev->camera.set_auto_exposure &&
 246                 dev->vsettings.auto_exposure == V4L2_EXPOSURE_AUTO) {
 247                 dev_sn9c20x_perform_soft_ae(dev);
 248         }
 249
 250         return 0;
 251 }
 252
 253 /**
 254  * @brief Wrapper function to detect a flipped sensor
 255  *
 256  * @param dev Pointer to device structure
 257  *
 258  * @returns 0 or negative error value
 259  *
 260  */
 261 int dev_sn9c20x_flip_detection(struct usb_sn9c20x *dev)
 262 {
 263         int ret = -ENODEV;
 264         if (dev && dev->camera.flip_detect)
 265                 ret = dev->camera.flip_detect(dev);
 266         return ret;
 267 }
 268
 269 /**
 270  * @brief Wrapper function to detect a pushed button
 271  *
 272  * @param dev Pointer to device structure
 273  *
 274  * @returns 0 or negative error value
 275  *
 276  */
 277 int dev_sn9c20x_button_detection(struct usb_sn9c20x *dev)
 278 {
 279         int ret = -ENODEV;
 280         if (dev && dev->camera.button_detect)
 281                 ret = dev->camera.button_detect(dev);
 282         return ret;
 283 }
 284
 285 /**
 286  * @brief Perform software autoexposure
 287  *
 288  * @param dev
 289  *
 290  * @returns 0 or negative error value
 291  *
 292  * @author Vasily Khoruzhick
 293  */
 294 int dev_sn9c20x_perform_soft_ae(struct usb_sn9c20x *dev)
 295 {
 296         int yavg;
 297         int koef = 100, new_exp, i;
 298         yavg = -1;
 299         i = 10;
 300
 301         if (!dev->camera.set_exposure)
 302                 return -1;
 303         yavg = atomic_read(&dev->camera.yavg);
 304
 305         UDIA_DEBUG("Sensor YAVG: %d\n", yavg);
 306         if (yavg < 0) {
 307                 /* Can't get YAVG - we have nothing to do */
 308                 return -1;
 309         }
 310
 311         /* Image is too dark */
 312         if (yavg < dev->camera.min_yavg) {
 313                 /* yavg can't be 0 - in that way new_exp == infinity */
 314                 if (yavg == 0)
 315                         yavg = 1;
 316                 if (dev->camera.old_yavg != -1) {
 317                         /* Previous correction was made to make image darker,
 318                          * but we made it too dark. Calculating our error
 319                          * and taking it into account.
 320                          * Usually error is 0.7 - 2, so we multiply it by 100
 321                          */
 322                         if (dev->camera.old_yavg > dev->camera.max_yavg)
 323                                 koef = 100 * dev->camera.
 324                                         min_stable_yavg / yavg;
 325                         else
 326                                 koef = 100;
 327                 }
 328
 329                 /* Calculating new exposure value. We assuming that
 330                  * exposure linearly depends on YAVG, but we taking
 331                  * our calculated error into account */
 332                 new_exp = (dev->camera.min_stable_yavg
 333                         * dev->vsettings.exposure * 100) / (yavg * koef);
 334
 335                 /* Exposure can't be more than 0xff or less than 0x1 */
 336                 if (new_exp > 0xff)
 337                         new_exp = 0xff;
 338                 if (new_exp < 0x1)
 339                         new_exp = 1;
 340
 341                 dev->camera.old_yavg = yavg;
 342
 343                 /* Applying new exposure */
 344                 dev->vsettings.exposure = new_exp;
 345                 dev->camera.set_exposure(dev);
 346         }
 347
 348         /* Image is too bright */
 349         else if (yavg > dev->camera.max_yavg) {
 350                         /* yavg can't be 0 - in that way new_exp == infinity */
 351                 if (yavg == 0)
 352                         yavg = 1;
 353                 if (dev->camera.old_yavg != -1) {
 354
 355                         /* Previous correction was made to make image brighter,
 356                          * but we made it too bright. Calculating our error
 357                          * and taking it into account.
 358                          * Usually error is 0.7 - 2, so we multiply it by 100
 359                          */
 360                         if (dev->camera.old_yavg < dev->camera.min_yavg)
 361                                 koef = 100 * yavg / dev->camera.
 362                                         max_stable_yavg;
 363                         else
 364                                 koef = 100;
 365                 }
 366
 367                 /* Calculating new exposure value. We assuming that
 368                  * exposure linearly depends on YAVG, but we taking
 369                  * our calculated error into account */
 370                 new_exp = (koef * dev->camera.max_stable_yavg
 371                         * dev->vsettings.exposure) / (yavg * 100);
 372
 373                 /* Exposure can't be more than 0xff or less than 0x1 */
 374                 if (new_exp > 0xff)
 375                         new_exp = 0xff;
 376                 if (new_exp < 0x1)
 377                         new_exp = 1;
 378
 379                 dev->camera.old_yavg = yavg;
 380
 381                 /* Applying new exposure */
 382                 dev->vsettings.exposure = new_exp;
 383                 dev->camera.set_exposure(dev);
 384         }
 385
 386         return 0;
 387 }
 388