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.set_exposure = mt9m111_set_exposure;
 197                 dev->camera.set_auto_exposure = mt9m111_set_autoexposure;
 198                 dev->camera.set_auto_whitebalance = mt9m111_set_autowhitebalance;
 199                 dev->camera.hstart = 0;
 200                 dev->camera.vstart = 2;
 201                 UDIA_INFO("Detected MT9M111 Sensor.\n");
 202                 break;
 203         case MT9V011_SENSOR:
 204                 sn9c20x_write_i2c_array(dev, mt9v011_init, 1);
 205                 dev->camera.set_hvflip = mt9v011_set_hvflip;
 206                 dev->camera.set_exposure = mt9v011_set_exposure;
 207                 dev->camera.hstart = 2;
 208                 dev->camera.vstart = 2;
 209                 UDIA_INFO("Detected MT9V011 Sensor.\n");
 210                 break;
 211         case MT9M001_SENSOR:
 212                 sn9c20x_write_i2c_array(dev, mt9m001_init, 1);
 213                 dev->camera.hstart = 2;
 214                 dev->camera.vstart = 2;
 215                 UDIA_INFO("Detected MT9M001 Sensor.\n");
 216                 break;
 217         case HV7131R_SENSOR:
 218                 dev->camera.i2c_flags |= SN9C20X_I2C_400KHZ;
 219                 sn9c20x_write_i2c_array(dev, hv7131r_init, 0);
 220                 dev->camera.set_hvflip = hv7131r_set_hvflip;
 221                 dev->camera.set_gain = hv7131r_set_gain;
 222                 dev->camera.set_exposure = hv7131r_set_exposure;
 223                 dev->camera.hstart = 0;
 224                 dev->camera.vstart = 1;
 225                 UDIA_INFO("Detected HV7131R Sensor.\n");
 226                 break;
 227         default:
 228                 ret = -EINVAL;
 229                 UDIA_INFO("Unsupported sensor.\n");
 230         }
 231         return ret;
 232 }
 233
 234
 235 /**
 236  * @brief Wrapper function to detect hardware states
 237  *
 238  * @param dev Pointer to device structure
 239  *
 240  * @returns 0
 241  */
 242 int dev_sn9c20x_call_constantly(struct usb_sn9c20x *dev)
 243 {
 244
 245         /* Know to be broken, temporarely disabled */
 246         /*dev_sn9c20x_flip_detection(dev);*/
 247         dev_sn9c20x_button_detection(dev);
 248         if (!dev->camera.set_auto_exposure &&
 249                 dev->vsettings.auto_exposure) {
 250                 dev_sn9c20x_perform_soft_ae(dev);
 251         }
 252
 253         return 0;
 254 }
 255
 256 /**
 257  * @brief Wrapper function to detect a flipped sensor
 258  *
 259  * @param dev Pointer to device structure
 260  *
 261  * @returns 0 or negative error value
 262  *
 263  */
 264 int dev_sn9c20x_flip_detection(struct usb_sn9c20x *dev)
 265 {
 266         int ret = -ENODEV;
 267         if (dev && dev->camera.flip_detect)
 268                 ret = dev->camera.flip_detect(dev);
 269         return ret;
 270 }
 271
 272 /**
 273  * @brief Wrapper function to detect a pushed button
 274  *
 275  * @param dev Pointer to device structure
 276  *
 277  * @returns 0 or negative error value
 278  *
 279  */
 280 int dev_sn9c20x_button_detection(struct usb_sn9c20x *dev)
 281 {
 282         int ret = -ENODEV;
 283         if (dev && dev->camera.button_detect)
 284                 ret = dev->camera.button_detect(dev);
 285         return ret;
 286 }
 287
 288 /**
 289  * @brief Perform software autoexposure
 290  *
 291  * @param dev
 292  *
 293  * @returns 0 or negative error value
 294  *
 295  * @author Vasily Khoruzhick
 296  */
 297 int dev_sn9c20x_perform_soft_ae(struct usb_sn9c20x *dev)
 298 {
 299         int yavg;
 300         int koef = 100, new_exp, i;
 301         yavg = -1;
 302         i = 10;
 303
 304         if (!dev->camera.set_exposure)
 305                 return -1;
 306         yavg = atomic_read(&dev->camera.yavg);
 307
 308         UDIA_DEBUG("Sensor YAVG: %d\n", yavg);
 309         if (yavg < 0) {
 310                 /* Can't get YAVG - we have nothing to do */
 311                 return -1;
 312         }
 313
 314         /* Image is too dark */
 315         if (yavg < dev->camera.min_yavg) {
 316                 /* yavg can't be 0 - in that way new_exp == infinity */
 317                 if (yavg == 0)
 318                         yavg = 1;
 319                 if (dev->camera.old_yavg != -1) {
 320                         /* Previous correction was made to make image darker,
 321                          * but we made it too dark. Calculating our error
 322                          * and taking it into account.
 323                          * Usually error is 0.7 - 2, so we multiply it by 100
 324                          */
 325                         if (dev->camera.old_yavg > dev->camera.max_yavg)
 326                                 koef = 100 * dev->camera.
 327                                         min_stable_yavg / yavg;
 328                         else
 329                                 koef = 100;
 330                 }
 331
 332                 /* Calculating new exposure value. We assuming that
 333                  * exposure linearly depends on YAVG, but we taking
 334                  * our calculated error into account */
 335                 new_exp = (dev->camera.min_stable_yavg
 336                         * dev->vsettings.exposure * 100) / (yavg * koef);
 337
 338                 /* Exposure can't be more than 0xff or less than 0x1 */
 339                 if (new_exp > 0xff)
 340                         new_exp = 0xff;
 341                 if (new_exp < 0x1)
 342                         new_exp = 1;
 343
 344                 dev->camera.old_yavg = yavg;
 345
 346                 /* Applying new exposure */
 347                 dev->vsettings.exposure = new_exp;
 348                 dev->camera.set_exposure(dev);
 349         }
 350
 351         /* Image is too bright */
 352         else if (yavg > dev->camera.max_yavg) {
 353                         /* yavg can't be 0 - in that way new_exp == infinity */
 354                 if (yavg == 0)
 355                         yavg = 1;
 356                 if (dev->camera.old_yavg != -1) {
 357
 358                         /* Previous correction was made to make image brighter,
 359                          * but we made it too bright. Calculating our error
 360                          * and taking it into account.
 361                          * Usually error is 0.7 - 2, so we multiply it by 100
 362                          */
 363                         if (dev->camera.old_yavg < dev->camera.min_yavg)
 364                                 koef = 100 * yavg / dev->camera.
 365                                         max_stable_yavg;
 366                         else
 367                                 koef = 100;
 368                 }
 369
 370                 /* Calculating new exposure value. We assuming that
 371                  * exposure linearly depends on YAVG, but we taking
 372                  * our calculated error into account */
 373                 new_exp = (koef * dev->camera.max_stable_yavg
 374                         * dev->vsettings.exposure) / (yavg * 100);
 375
 376                 /* Exposure can't be more than 0xff or less than 0x1 */
 377                 if (new_exp > 0xff)
 378                         new_exp = 0xff;
 379                 if (new_exp < 0x1)
 380                         new_exp = 1;
 381
 382                 dev->camera.old_yavg = yavg;
 383
 384                 /* Applying new exposure */
 385                 dev->vsettings.exposure = new_exp;
 386                 dev->camera.set_exposure(dev);
 387         }
 388
 389         return 0;
 390 }
 391