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 };
  40
  41 struct sn9c20x_video_mode sn9c20x_modes[SN9C20X_N_MODES] = {
  42         {
  43                 .width = 128,
  44                 .height = 96,
  45                 .scale = SN9C20X_1_4_SCALE,
  46                 .window = {65, 48, 1024, 768}
  47         },
  48         {
  49                 .width = 160,
  50                 .height = 120,
  51                 .scale = SN9C20X_1_4_SCALE,
  52                 .window = {0, 0, 640, 480}
  53         },
  54         {
  55                 .width = 176,
  56                 .height = 144,
  57                 .scale = SN9C20X_1_2_SCALE,
  58                 .window = {145, 96, 704, 576}
  59         },
  60         {
  61                 .width = 320,
  62                 .height = 240,
  63                 .scale = SN9C20X_1_2_SCALE,
  64                 .window = {0, 0, 640, 480}
  65         },
  66         {
  67                 .width = 352,
  68                 .height = 288,
  69                 .scale = SN9C20X_NO_SCALE,
  70                 .window = {145, 96, 704, 576}
  71         },
  72         {
  73                 .width = 640,
  74                 .height = 480,
  75                 .scale = SN9C20X_NO_SCALE,
  76                 .window = {0, 0, 640, 480}
  77         },
  78 };
  79
  80 struct sn9c20x_video_format sn9c20x_fmts[SN9C20X_N_FMTS] = {
  81         {
  82                 .pix_fmt = V4L2_PIX_FMT_SBGGR8,
  83                 .desc = "Bayer 8bit (BGGR)",
  84                 .depth = 8,
  85                 .set_format = sn9c20x_set_raw,
  86         },
  87         {
  88                 .pix_fmt = V4L2_PIX_FMT_YUV420,
  89                 .desc = "I420 (YUV 4:2:0)",
  90                 .depth = 12,
  91                 .set_format = sn9c20x_set_yuv420,
  92         },
  93         {
  94                 .pix_fmt = V4L2_PIX_FMT_YUYV,
  95                 .desc = "YUYV (YUV 4:2:0)",
  96                 .depth = 16,
  97                 .set_format = sn9c20x_set_yuv422,
  98         },
  99         {
 100                 .pix_fmt = V4L2_PIX_FMT_JPEG,
 101                 .desc = "JPEG (YUV 4:2:2)",
 102                 .depth = 16,
 103                 .set_format = sn9c20x_set_jpeg,
 104         },
 105 };
 106
 107 int sn9c20x_initialize_sensor(struct usb_sn9c20x *dev)
 108 {
 109         int ret = 0;
 110         int i;
 111
 112         dev->camera.min_yavg = 30;
 113         dev->camera.max_yavg = 60;
 114         dev->camera.min_stable_yavg = 32;
 115         dev->camera.max_stable_yavg = 58;
 116
 117         /* Probe sensor first if sensor set to probe*/
 118         if (dev->camera.sensor == PROBE_SENSOR) {
 119                 for (i = 0; i < ARRAY_SIZE(sn_probes); i++) {
 120                         ret = sn_probes[i](dev);
 121                         if (ret != -EINVAL)
 122                                 break;
 123                         dev->camera.sensor = ret;
 124                 }
 125         }
 126
 127         switch (dev->camera.sensor) {
 128         case SOI968_SENSOR:
 129                 sn9c20x_write_i2c_array(dev, soi968_init, 0);
 130                 dev->camera.set_exposure = soi968_set_exposure;
 131                 dev->camera.set_auto_exposure = ov_set_autoexposure;
 132                 dev->camera.set_auto_gain = ov_set_autogain;
 133                 dev->camera.button_detect = soi968_button_detect;
 134                 dev->camera.hstart = 60;
 135                 dev->camera.vstart = 11;
 136                 UDIA_INFO("Detected SOI968 Sensor.\n");
 137                 break;
 138         case OV9650_SENSOR:
 139                 sn9c20x_write_i2c_array(dev, ov9650_init, 0);
 140                 dev->camera.hstart = 1;
 141                 dev->camera.vstart = 7;
 142                 dev->camera.set_hvflip = ov965x_set_hvflip;
 143                 dev->camera.set_exposure = ov965x_set_exposure;
 144                 dev->camera.set_auto_gain = ov_set_autogain;
 145                 dev->camera.flip_detect = ov965x_flip_detect;
 146                 dev->camera.get_yavg = ov965x_get_yavg;
 147                 UDIA_INFO("Detected OV9650 Sensor.\n");
 148                 break;
 149         case OV9655_SENSOR:
 150                 sn9c20x_write_i2c_array(dev, ov9655_init, 0);
 151                 dev->camera.set_auto_exposure = ov_set_autoexposure;
 152                 dev->camera.set_auto_gain = ov_set_autogain;
 153                 dev->camera.hstart = 0;
 154                 dev->camera.vstart = 7;
 155                 UDIA_INFO("Detected OV9655 Sensor.\n");
 156                 break;
 157         case OV7670_SENSOR:
 158                 sn9c20x_write_i2c_array(dev, ov7670_init, 0);
 159                 dev->camera.set_auto_exposure = ov_set_autoexposure;
 160                 dev->camera.set_exposure = ov7660_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 = ov7660_set_exposure;
 170                 dev->camera.set_auto_gain = ov_set_autogain;
 171                 dev->camera.hstart = 1;
 172                 dev->camera.vstart = 1;
 173                 dev->camera.get_yavg = ov965x_get_yavg;
 174                 UDIA_INFO("Detected OV7660 Sensor.\n");
 175                 break;
 176         case MT9V111_SENSOR:
 177                 sn9c20x_write_i2c_array(dev, mt9v111_init, 1);
 178                 dev->camera.set_hvflip = mt9v111_set_hvflip;
 179                 dev->camera.set_exposure = mt9v111_set_exposure;
 180                 dev->camera.set_auto_exposure = mt9v111_set_autoexposure;
 181                 dev->camera.hstart = 2;
 182                 dev->camera.vstart = 2;
 183                 UDIA_INFO("Detected MT9V111 Sensor.\n");
 184                 break;
 185         case MT9M111_SENSOR:
 186                 sn9c20x_write_i2c_array(dev, mt9m111_init, 1);
 187                 dev->camera.hstart = 6;
 188                 dev->camera.vstart = 2;
 189                 UDIA_INFO("Detected MT9M111 Sensor.\n");
 190                 break;
 191         case MT9V011_SENSOR:
 192                 sn9c20x_write_i2c_array(dev, mt9v011_init, 1);
 193                 dev->camera.set_hvflip = mt9v011_set_hvflip;
 194                 dev->camera.set_exposure = mt9v011_set_exposure;
 195                 dev->camera.hstart = 2;
 196                 dev->camera.vstart = 2;
 197                 UDIA_INFO("Detected MT9V011 Sensor.\n");
 198                 break;
 199         case MT9M001_SENSOR:
 200                 sn9c20x_write_i2c_array(dev, mt9m001_init, 1);
 201                 dev->camera.hstart = 2;
 202                 dev->camera.vstart = 2;
 203                 UDIA_INFO("Detected MT9M001 Sensor.\n");
 204                 break;
 205         case HV7131R_SENSOR:
 206                 dev->camera.i2c_flags |= SN9C20X_I2C_400KHZ;
 207                 sn9c20x_write_i2c_array(dev, hv7131r_init, 0);
 208                 dev->camera.set_hvflip = hv7131r_set_hvflip;
 209                 dev->camera.set_gain = hv7131r_set_gain;
 210                 dev->camera.set_exposure = hv7131r_set_exposure;
 211                 dev->camera.hstart = 0;
 212                 dev->camera.vstart = 1;
 213                 UDIA_INFO("Detected HV7131R Sensor.\n");
 214                 break;
 215         default:
 216                 ret = -EINVAL;
 217                 UDIA_INFO("Unsupported sensor.\n");
 218         }
 219         return ret;
 220 }
 221
 222
 223 /**
 224  * @brief Wrapper function to detect hardware states
 225  *
 226  * @param dev Pointer to device structure
 227  *
 228  * @returns 0
 229  */
 230 int dev_sn9c20x_call_constantly(struct usb_sn9c20x *dev)
 231 {
 232
 233         /* Know to be broken, temporarely disabled */
 234         /*dev_sn9c20x_flip_detection(dev);*/
 235         dev_sn9c20x_button_detection(dev);
 236         if (!dev->camera.set_auto_exposure &&
 237                 dev->camera.get_yavg &&
 238                 dev->vsettings.auto_exposure == V4L2_EXPOSURE_AUTO) {
 239                 dev_sn9c20x_perform_soft_ae(dev);
 240         }
 241
 242         return 0;
 243 }
 244
 245 /**
 246  * @brief Wrapper function to detect a flipped sensor
 247  *
 248  * @param dev Pointer to device structure
 249  *
 250  * @returns 0 or negative error value
 251  *
 252  */
 253 int dev_sn9c20x_flip_detection(struct usb_sn9c20x *dev)
 254 {
 255         int ret = -ENODEV;
 256         if (dev && dev->camera.flip_detect)
 257                 ret = dev->camera.flip_detect(dev);
 258         return ret;
 259 }
 260
 261 /**
 262  * @brief Wrapper function to detect a pushed button
 263  *
 264  * @param dev Pointer to device structure
 265  *
 266  * @returns 0 or negative error value
 267  *
 268  */
 269 int dev_sn9c20x_button_detection(struct usb_sn9c20x *dev)
 270 {
 271         int ret = -ENODEV;
 272         if (dev && dev->camera.button_detect)
 273                 ret = dev->camera.button_detect(dev);
 274         return ret;
 275 }
 276
 277 /**
 278  * @brief Perform software autoexposure
 279  *
 280  * @param dev
 281  *
 282  * @returns 0 or negative error value
 283  *
 284  * @author Vasily Khoruzhick
 285  */
 286 int dev_sn9c20x_perform_soft_ae(struct usb_sn9c20x *dev)
 287 {
 288         int yavg;
 289         static int old_yavg = -1, old_exp = -1;
 290         int koef = 100, new_exp, i;
 291         yavg = -1;
 292         i = 10;
 293
 294         if (!dev->camera.set_exposure)
 295                 return -1;
 296         if (!dev->camera.get_yavg)
 297                 return -1;
 298
 299         /* Trying to get average value of Y */
 300         while ((yavg == -1) && (i--))
 301                 yavg = dev->camera.get_yavg(dev);
 302
 303         if (yavg == -1) {
 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_exp = dev->vsettings.exposure;
 339                 old_yavg = yavg;
 340
 341                 /* Applying new exposure */
 342                 dev->vsettings.exposure = new_exp;
 343                 dev->camera.set_exposure(dev);
 344         }
 345
 346         /* Image is too bright */
 347         else if (yavg > dev->camera.max_yavg) {
 348                         /* yavg can't be 0 - in that way new_exp == infinity */
 349                 if (yavg == 0)
 350                         yavg = 1;
 351                 if (old_yavg != -1) {
 352
 353                         /* Previous correction was made to make image brighter,
 354                          * but we made it too bright. Calculating our error
 355                          * and taking it into account.
 356                          * Usually error is 0.7 - 2, so we multiply it by 100
 357                          */
 358                         if (old_yavg < dev->camera.min_yavg)
 359                                 koef = 100 * yavg / dev->camera.
 360                                         max_stable_yavg;
 361                         else
 362                                 koef = 100;
 363                 }
 364
 365                 /* Calculating new exposure value. We assuming that
 366                  * exposure linearly depends on YAVG, but we taking
 367                  * our calculated error into account */
 368                 new_exp = (koef * dev->camera.max_stable_yavg
 369                         * dev->vsettings.exposure) / (yavg * 100);
 370
 371                 /* Exposure can't be more than 0xff or less than 0x1 */
 372                 if (new_exp > 0xff)
 373                         new_exp = 0xff;
 374                 if (new_exp < 0x1)
 375                         new_exp = 1;
 376
 377                 old_exp = dev->vsettings.exposure;
 378                 old_yavg = yavg;
 379
 380                 /* Applying new exposure */
 381                 dev->vsettings.exposure = new_exp;
 382                 dev->camera.set_exposure(dev);
 383         }
 384
 385         return 0;
 386 }
 387