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_SBGGR8,
  84                 .desc = "Bayer 8bit (BGGR)",
  85                 .depth = 8,
  86                 .set_format = sn9c20x_set_raw,
  87         },
  88         {
  89                 .pix_fmt = V4L2_PIX_FMT_YUV420,
  90                 .desc = "I420 (YUV 4:2:0)",
  91                 .depth = 12,
  92                 .set_format = sn9c20x_set_yuv420,
  93         },
  94         {
  95                 .pix_fmt = V4L2_PIX_FMT_YUYV,
  96                 .desc = "YUYV (YUV 4:2:0)",
  97                 .depth = 16,
  98                 .set_format = sn9c20x_set_yuv422,
  99         },
 100         {
 101                 .pix_fmt = V4L2_PIX_FMT_JPEG,
 102                 .desc = "JPEG (YUV 4:2:2)",
 103                 .depth = 16,
 104                 .set_format = sn9c20x_set_jpeg,
 105         },
 106 };
 107
 108 int sn9c20x_initialize_sensor(struct usb_sn9c20x *dev)
 109 {
 110         int ret = 0;
 111         int i;
 112
 113         dev->camera.min_yavg = 60;
 114         dev->camera.max_yavg = 150;
 115         dev->camera.min_stable_yavg = 70;
 116         dev->camera.max_stable_yavg = 140;
 117
 118         /* Probe sensor first if sensor set to probe*/
 119         if (dev->camera.sensor == PROBE_SENSOR) {
 120                 for (i = 0; i < ARRAY_SIZE(sn_probes); i++) {
 121                         ret = sn_probes[i](dev);
 122                         if (ret != -EINVAL)
 123                                 break;
 124                         dev->camera.sensor = ret;
 125                 }
 126         }
 127
 128         switch (dev->camera.sensor) {
 129         case SOI968_SENSOR:
 130                 sn9c20x_write_i2c_array(dev, soi968_init, 0);
 131                 dev->camera.set_exposure = soi968_set_exposure;
 132                 dev->camera.set_auto_exposure = soi968_set_autoexposure;
 133                 dev->camera.set_gain = soi968_set_gain;
 134                 dev->camera.set_auto_gain = ov_set_autogain;
 135                 dev->camera.button_detect = soi968_button_detect;
 136                 dev->camera.hstart = 60;
 137                 dev->camera.vstart = 11;
 138                 UDIA_INFO("Detected SOI968 Sensor.\n");
 139                 break;
 140         case OV9650_SENSOR:
 141                 sn9c20x_write_i2c_array(dev, ov9650_init, 0);
 142                 dev->camera.hstart = 1;
 143                 dev->camera.vstart = 7;
 144                 dev->camera.set_hvflip = ov965x_set_hvflip;
 145                 dev->camera.set_exposure = ov_set_exposure;
 146                 dev->camera.set_auto_gain = ov_set_autogain;
 147                 dev->camera.flip_detect = ov965x_flip_detect;
 148                 UDIA_INFO("Detected OV9650 Sensor.\n");
 149                 break;
 150         case OV9655_SENSOR:
 151                 sn9c20x_write_i2c_array(dev, ov9655_init, 0);
 152                 dev->camera.set_exposure = ov_set_exposure;
 153                 dev->camera.set_auto_gain = ov_set_autogain;
 154                 dev->camera.hstart = 0;
 155                 dev->camera.vstart = 7;
 156                 UDIA_INFO("Detected OV9655 Sensor.\n");
 157                 break;
 158         case OV7670_SENSOR:
 159                 sn9c20x_write_i2c_array(dev, ov7670_init, 0);
 160                 dev->camera.set_exposure = ov_set_exposure;
 161                 dev->camera.set_auto_gain = ov_set_autogain;
 162                 dev->camera.flip_detect = ov7670_flip_detect;
 163                 dev->camera.hstart = 0;
 164                 dev->camera.vstart = 1;
 165                 UDIA_INFO("Detected OV7670 Sensor.\n");
 166                 break;
 167         case OV7660_SENSOR:
 168                 sn9c20x_write_i2c_array(dev, ov7660_init, 0);
 169                 dev->camera.set_exposure = ov_set_exposure;
 170                 dev->camera.set_auto_gain = ov_set_autogain;
 171                 dev->camera.hstart = 1;
 172                 dev->camera.vstart = 1;
 173                 UDIA_INFO("Detected OV7660 Sensor.\n");
 174                 break;
 175         case MT9V111_SENSOR:
 176                 sn9c20x_write_i2c_array(dev, mt9v111_init, 1);
 177                 dev->camera.set_hvflip = mt9v111_set_hvflip;
 178                 dev->camera.set_exposure = mt9v111_set_exposure;
 179                 dev->camera.set_auto_exposure = mt9v111_set_autoexposure;
 180                 dev->camera.hstart = 2;
 181                 dev->camera.vstart = 2;
 182                 UDIA_INFO("Detected MT9V111 Sensor.\n");
 183                 break;
 184         case MT9V112_SENSOR:
 185                 sn9c20x_write_i2c_array(dev, mt9v112_init, 1);
 186                 dev->camera.hstart = 6;
 187                 dev->camera.vstart = 2;
 188                 UDIA_INFO("Detected MT9V112 Sensor.\n");
 189                 break;
 190         case MT9M111_SENSOR:
 191                 sn9c20x_write_i2c_array(dev, mt9m111_init, 1);
 192                 dev->camera.hstart = 6;
 193                 dev->camera.vstart = 2;
 194                 UDIA_INFO("Detected MT9M111 Sensor.\n");
 195                 break;
 196         case MT9V011_SENSOR:
 197                 sn9c20x_write_i2c_array(dev, mt9v011_init, 1);
 198                 dev->camera.set_hvflip = mt9v011_set_hvflip;
 199                 dev->camera.set_exposure = mt9v011_set_exposure;
 200                 dev->camera.hstart = 2;
 201                 dev->camera.vstart = 2;
 202                 UDIA_INFO("Detected MT9V011 Sensor.\n");
 203                 break;
 204         case MT9M001_SENSOR:
 205                 sn9c20x_write_i2c_array(dev, mt9m001_init, 1);
 206                 dev->camera.hstart = 2;
 207                 dev->camera.vstart = 2;
 208                 UDIA_INFO("Detected MT9M001 Sensor.\n");
 209                 break;
 210         case HV7131R_SENSOR:
 211                 dev->camera.i2c_flags |= SN9C20X_I2C_400KHZ;
 212                 sn9c20x_write_i2c_array(dev, hv7131r_init, 0);
 213                 dev->camera.set_hvflip = hv7131r_set_hvflip;
 214                 dev->camera.set_gain = hv7131r_set_gain;
 215                 dev->camera.set_exposure = hv7131r_set_exposure;
 216                 dev->camera.hstart = 0;
 217                 dev->camera.vstart = 1;
 218                 UDIA_INFO("Detected HV7131R Sensor.\n");
 219                 break;
 220         default:
 221                 ret = -EINVAL;
 222                 UDIA_INFO("Unsupported sensor.\n");
 223         }
 224         return ret;
 225 }
 226
 227
 228 /**
 229  * @brief Wrapper function to detect hardware states
 230  *
 231  * @param dev Pointer to device structure
 232  *
 233  * @returns 0
 234  */
 235 int dev_sn9c20x_call_constantly(struct usb_sn9c20x *dev)
 236 {
 237
 238         /* Know to be broken, temporarely disabled */
 239         /*dev_sn9c20x_flip_detection(dev);*/
 240         dev_sn9c20x_button_detection(dev);
 241         if (!dev->camera.set_auto_exposure &&
 242                 dev->vsettings.auto_exposure == V4L2_EXPOSURE_AUTO) {
 243                 dev_sn9c20x_perform_soft_ae(dev);
 244         }
 245
 246         return 0;
 247 }
 248
 249 /**
 250  * @brief Wrapper function to detect a flipped sensor
 251  *
 252  * @param dev Pointer to device structure
 253  *
 254  * @returns 0 or negative error value
 255  *
 256  */
 257 int dev_sn9c20x_flip_detection(struct usb_sn9c20x *dev)
 258 {
 259         int ret = -ENODEV;
 260         if (dev && dev->camera.flip_detect)
 261                 ret = dev->camera.flip_detect(dev);
 262         return ret;
 263 }
 264
 265 /**
 266  * @brief Wrapper function to detect a pushed button
 267  *
 268  * @param dev Pointer to device structure
 269  *
 270  * @returns 0 or negative error value
 271  *
 272  */
 273 int dev_sn9c20x_button_detection(struct usb_sn9c20x *dev)
 274 {
 275         int ret = -ENODEV;
 276         if (dev && dev->camera.button_detect)
 277                 ret = dev->camera.button_detect(dev);
 278         return ret;
 279 }
 280
 281 /**
 282  * @brief Perform software autoexposure
 283  *
 284  * @param dev
 285  *
 286  * @returns 0 or negative error value
 287  *
 288  * @author Vasily Khoruzhick
 289  */
 290 int dev_sn9c20x_perform_soft_ae(struct usb_sn9c20x *dev)
 291 {
 292         int yavg;
 293         static int old_yavg = -1;
 294         int koef = 100, new_exp, i;
 295         yavg = -1;
 296         i = 10;
 297
 298         if (!dev->camera.set_exposure)
 299                 return -1;
 300         yavg = atomic_read(&dev->camera.yavg);
 301
 302         UDIA_INFO("Sensor YAVG: %d\n", yavg);
 303         if (yavg < 0) {
 304                 /* Can't get YAVG - we have nothing to do */
 305                 return -1;
 306         }
 307
 308         /* Image is too dark */
 309         if (yavg < dev->camera.min_yavg) {
 310                 /* yavg can't be 0 - in that way new_exp == infinity */
 311                 if (yavg == 0)
 312                         yavg = 1;
 313                 if (old_yavg != -1) {
 314                         /* Previous correction was made to make image darker,
 315                          * but we made it too dark. Calculating our error
 316                          * and taking it into account.
 317                          * Usually error is 0.7 - 2, so we multiply it by 100
 318                          */
 319                         if (old_yavg > dev->camera.max_yavg)
 320                                 koef = 100 * dev->camera.
 321                                         min_stable_yavg / yavg;
 322                         else
 323                                 koef = 100;
 324                 }
 325
 326                 /* Calculating new exposure value. We assuming that
 327                  * exposure linearly depends on YAVG, but we taking
 328                  * our calculated error into account */
 329                 new_exp = (dev->camera.min_stable_yavg
 330                         * dev->vsettings.exposure * 100) / (yavg * koef);
 331
 332                 /* Exposure can't be more than 0xff or less than 0x1 */
 333                 if (new_exp > 0xff)
 334                         new_exp = 0xff;
 335                 if (new_exp < 0x1)
 336                         new_exp = 1;
 337
 338                 old_yavg = yavg;
 339
 340                 /* Applying new exposure */
 341                 dev->vsettings.exposure = new_exp;
 342                 dev->camera.set_exposure(dev);
 343         }
 344
 345         /* Image is too bright */
 346         else if (yavg > dev->camera.max_yavg) {
 347                         /* yavg can't be 0 - in that way new_exp == infinity */
 348                 if (yavg == 0)
 349                         yavg = 1;
 350                 if (old_yavg != -1) {
 351
 352                         /* Previous correction was made to make image brighter,
 353                          * but we made it too bright. Calculating our error
 354                          * and taking it into account.
 355                          * Usually error is 0.7 - 2, so we multiply it by 100
 356                          */
 357                         if (old_yavg < dev->camera.min_yavg)
 358                                 koef = 100 * yavg / dev->camera.
 359                                         max_stable_yavg;
 360                         else
 361                                 koef = 100;
 362                 }
 363
 364                 /* Calculating new exposure value. We assuming that
 365                  * exposure linearly depends on YAVG, but we taking
 366                  * our calculated error into account */
 367                 new_exp = (koef * dev->camera.max_stable_yavg
 368                         * dev->vsettings.exposure) / (yavg * 100);
 369
 370                 /* Exposure can't be more than 0xff or less than 0x1 */
 371                 if (new_exp > 0xff)
 372                         new_exp = 0xff;
 373                 if (new_exp < 0x1)
 374                         new_exp = 1;
 375
 376                 old_yavg = yavg;
 377
 378                 /* Applying new exposure */
 379                 dev->vsettings.exposure = new_exp;
 380                 dev->camera.set_exposure(dev);
 381         }
 382
 383         return 0;
 384 }
 385