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                 .width = 1280,
  81                 .height = 1024,
  82                 .scale = SN9C20X_NO_SCALE,
  83                 .window = {0, 0, 1280, 1024}
  84         },
  85 };
  86
  87 struct sn9c20x_video_format sn9c20x_fmts[SN9C20X_N_FMTS] = {
  88         {
  89                 .pix_fmt = V4L2_PIX_FMT_SN9C20X_I420,
  90                 .desc = "SN9C20X I420 (YUV 4:2:0)",
  91                 .depth = 12,
  92                 .set_format = sn9c20x_set_yuv420,
  93         },
  94         {
  95                 .pix_fmt = V4L2_PIX_FMT_SBGGR8,
  96                 .desc = "Bayer 8bit (BGGR)",
  97                 .depth = 8,
  98                 .set_format = sn9c20x_set_raw,
  99         },
 100 /*
 101         {
 102                 .pix_fmt = V4L2_PIX_FMT_YUYV,
 103                 .desc = "YUYV (YUV 4:2:0)",
 104                 .depth = 16,
 105                 .set_format = sn9c20x_set_yuv422,
 106         },
 107 */
 108         {
 109                 .pix_fmt = V4L2_PIX_FMT_JPEG,
 110                 .desc = "JPEG (YUV 4:2:2)",
 111                 .depth = 16,
 112                 .set_format = sn9c20x_set_jpeg,
 113         },
 114 };
 115
 116 int sn9c20x_initialize_sensor(struct usb_sn9c20x *dev)
 117 {
 118         int ret = 0;
 119         int i;
 120
 121         dev->camera.min_yavg = 80;
 122         dev->camera.max_yavg = 130;
 123         dev->camera.old_step = 0;
 124         dev->camera.older_step = 0;
 125         dev->camera.exposure_step = 16;
 126
 127         /* Probe sensor first if sensor set to probe*/
 128         if (dev->camera.sensor == PROBE_SENSOR) {
 129                 for (i = 0; i < ARRAY_SIZE(sn_probes); i++) {
 130                         ret = sn_probes[i](dev);
 131                         dev->camera.sensor = ret;
 132                         if (ret > 0)
 133                                 break;
 134                 }
 135         }
 136
 137         switch (dev->camera.sensor) {
 138         case SOI968_SENSOR:
 139                 sn9c20x_write_i2c_array(dev, soi968_init, 0);
 140                 dev->camera.set_sxga_mode = ov965x_set_sxga_mode;
 141                 dev->camera.set_exposure = soi968_set_exposure;
 142                 dev->camera.set_auto_exposure = soi968_set_autoexposure;
 143                 dev->camera.set_gain = soi968_set_gain;
 144                 dev->camera.set_auto_gain = ov_set_autogain;
 145                 dev->camera.set_auto_whitebalance = soi968_set_autowhitebalance;
 146                 dev->camera.hstart = 60;
 147                 dev->camera.vstart = 11;
 148                 UDIA_INFO("Detected SOI968 Sensor.\n");
 149                 break;
 150         case OV9650_SENSOR:
 151                 sn9c20x_write_i2c_array(dev, ov9650_init, 0);
 152                 dev->camera.hstart = 1;
 153                 dev->camera.vstart = 7;
 154                 dev->camera.set_sxga_mode = ov965x_set_sxga_mode;
 155                 dev->camera.set_hvflip = ov965x_set_hvflip;
 156                 dev->camera.set_exposure = ov_set_exposure;
 157                 dev->camera.set_auto_gain = ov_set_autogain;
 158                 dev->camera.set_gain = ov9650_set_gain;
 159                 dev->camera.flip_detect = ov965x_flip_detect;
 160                 UDIA_INFO("Detected OV9650 Sensor.\n");
 161                 break;
 162         case OV9655_SENSOR:
 163                 sn9c20x_write_i2c_array(dev, ov9655_init, 0);
 164                 dev->camera.set_sxga_mode = ov965x_set_sxga_mode;
 165                 dev->camera.set_exposure = ov_set_exposure;
 166                 dev->camera.set_auto_gain = ov_set_autogain;
 167                 dev->camera.hstart = 0;
 168                 dev->camera.vstart = 7;
 169                 UDIA_INFO("Detected OV9655 Sensor.\n");
 170                 break;
 171         case OV7670_SENSOR:
 172                 sn9c20x_write_i2c_array(dev, ov7670_init, 0);
 173                 dev->camera.set_exposure = ov_set_exposure;
 174                 dev->camera.set_auto_gain = ov_set_autogain;
 175                 dev->camera.flip_detect = ov7670_flip_detect;
 176                 dev->camera.hstart = 0;
 177                 dev->camera.vstart = 1;
 178                 UDIA_INFO("Detected OV7670 Sensor.\n");
 179                 break;
 180         case OV7660_SENSOR:
 181                 sn9c20x_write_i2c_array(dev, ov7660_init, 0);
 182                 dev->camera.set_exposure = ov_set_exposure;
 183                 dev->camera.set_auto_gain = ov_set_autogain;
 184                 dev->camera.set_gain = ov9650_set_gain;
 185                 dev->camera.hstart = 1;
 186                 dev->camera.vstart = 1;
 187                 UDIA_INFO("Detected OV7660 Sensor.\n");
 188                 break;
 189         case MT9V111_SENSOR:
 190                 sn9c20x_write_i2c_array(dev, mt9v111_init, 1);
 191                 dev->camera.set_hvflip = mt9v111_set_hvflip;
 192                 dev->camera.set_exposure = mt9v111_set_exposure;
 193                 dev->camera.set_auto_exposure = mt9v111_set_autoexposure;
 194                 dev->camera.set_auto_whitebalance = mt9v111_set_autowhitebalance;
 195                 dev->camera.hstart = 2;
 196                 dev->camera.vstart = 2;
 197                 UDIA_INFO("Detected MT9V111 Sensor.\n");
 198                 break;
 199         case MT9V112_SENSOR:
 200                 sn9c20x_write_i2c_array(dev, mt9v112_init, 1);
 201                 dev->camera.set_hvflip = mt9v112_set_hvflip;
 202                 dev->camera.hstart = 6;
 203                 dev->camera.vstart = 2;
 204                 UDIA_INFO("Detected MT9V112 Sensor.\n");
 205                 break;
 206         case MT9M111_SENSOR:
 207                 sn9c20x_write_i2c_array(dev, mt9m111_init, 1);
 208                 dev->camera.set_exposure = mt9m111_set_exposure;
 209                 dev->camera.set_auto_exposure = mt9m111_set_autoexposure;
 210                 dev->camera.set_auto_whitebalance = mt9m111_set_autowhitebalance;
 211                 dev->camera.hstart = 0;
 212                 dev->camera.vstart = 2;
 213                 UDIA_INFO("Detected MT9M111 Sensor.\n");
 214                 break;
 215         case MT9V011_SENSOR:
 216                 sn9c20x_write_i2c_array(dev, mt9v011_init, 1);
 217                 dev->camera.set_hvflip = mt9v011_set_hvflip;
 218                 dev->camera.set_exposure = mt9v011_set_exposure;
 219                 dev->camera.hstart = 2;
 220                 dev->camera.vstart = 2;
 221                 UDIA_INFO("Detected MT9V011 Sensor.\n");
 222                 break;
 223         case MT9M001_SENSOR:
 224                 sn9c20x_write_i2c_array(dev, mt9m001_init, 1);
 225                 dev->camera.hstart = 2;
 226                 dev->camera.vstart = 2;
 227                 UDIA_INFO("Detected MT9M001 Sensor.\n");
 228                 break;
 229         case HV7131R_SENSOR:
 230                 dev->camera.i2c_flags |= SN9C20X_I2C_400KHZ;
 231                 sn9c20x_write_i2c_array(dev, hv7131r_init, 0);
 232                 dev->camera.set_hvflip = hv7131r_set_hvflip;
 233                 dev->camera.set_gain = hv7131r_set_gain;
 234                 dev->camera.set_exposure = hv7131r_set_exposure;
 235                 dev->camera.hstart = 0;
 236                 dev->camera.vstart = 1;
 237                 UDIA_INFO("Detected HV7131R Sensor.\n");
 238                 break;
 239         default:
 240                 ret = -EINVAL;
 241                 UDIA_INFO("Unsupported sensor.\n");
 242         }
 243         return ret;
 244 }
 245
 246
 247 /**
 248  * @brief Wrapper function to detect hardware states
 249  *
 250  * @param dev Pointer to device structure
 251  *
 252  * @returns 0
 253  */
 254 int dev_sn9c20x_call_constantly(struct usb_sn9c20x *dev)
 255 {
 256
 257         /* Know to be broken, temporarely disabled */
 258         /*dev_sn9c20x_flip_detection(dev);*/
 259         if (!dev->camera.set_auto_exposure &&
 260                 dev->vsettings.auto_exposure) {
 261                 dev_sn9c20x_perform_soft_ae(dev);
 262         }
 263
 264         return 0;
 265 }
 266
 267 /**
 268  * @brief Wrapper function to detect a flipped sensor
 269  *
 270  * @param dev Pointer to device structure
 271  *
 272  * @returns 0 or negative error value
 273  *
 274  */
 275 int dev_sn9c20x_flip_detection(struct usb_sn9c20x *dev)
 276 {
 277         int ret = -ENODEV;
 278         if (dev && dev->camera.flip_detect)
 279                 ret = dev->camera.flip_detect(dev);
 280         return ret;
 281 }
 282
 283 /**
 284  * @brief Perform software autoexposure
 285  *
 286  * @param dev
 287  *
 288  * @returns 0 or negative error value
 289  *
 290  * @author Stefan Krastanov
 291  */
 292 int dev_sn9c20x_perform_soft_ae(struct usb_sn9c20x *dev)
 293 {
 294         int yavg, new_exp;
 295         yavg = -1;
 296
 297         if (!dev->camera.set_exposure)
 298                 return -1;
 299         yavg = atomic_read(&dev->camera.yavg);
 300
 301         UDIA_DEBUG("Sensor YAVG: %d\n", yavg);
 302         if (yavg < 0) {
 303                 /* Can't get YAVG - we have nothing to do */
 304                 return -1;
 305         }
 306
 307         /*some hardcoded values are present
 308          *like those for maximal/minimal exposure
 309          *and exposure steps*/
 310
 311         /* image too dark */
 312         if (yavg < dev->camera.min_yavg) {
 313                 /*worst case - exposure is allready maximal*/
 314                 if (dev->vsettings.exposure > 0xf5)
 315                         return 0;
 316                 /*change exposure just a bit*/
 317                 new_exp = dev->vsettings.exposure + dev->camera.exposure_step;
 318                 if (new_exp > 0xff)
 319                         new_exp = 0xff;
 320                 if (new_exp < 0x1)
 321                         new_exp = 1;
 322                 /*set it*/
 323                 dev->vsettings.exposure = new_exp;
 324                 dev->camera.set_exposure(dev);
 325                 /*note the direction of the change*/
 326                 dev->camera.older_step = dev->camera.old_step;
 327                 dev->camera.old_step = 1; /*it's going up*/
 328
 329                 /*check if it's oscillating and take smaller step if it is*/
 330                 if (dev->camera.old_step ^ dev->camera.older_step)
 331                         dev->camera.exposure_step /= 2;
 332                         /* oscilating - divide the step by 2 */
 333                 else
 334                         dev->camera.exposure_step += 2;
 335                         /* same direction - step must be bigger */
 336         }
 337         /*image too light*/
 338         if (yavg > dev->camera.max_yavg) {
 339                 /*worst case - exposure is allready minimal*/
 340                 if (dev->vsettings.exposure < 0x10)
 341                         return 0;
 342                 /*change exposure just a bit*/
 343                 new_exp = dev->vsettings.exposure - dev->camera.exposure_step;
 344                 if (new_exp > 0xff)
 345                         new_exp = 0xff;
 346                 if (new_exp < 0x1)
 347                         new_exp = 1;
 348                 /*set it*/
 349                 dev->vsettings.exposure = new_exp;
 350                 dev->camera.set_exposure(dev);
 351                 /*note the direction of the change*/
 352                 dev->camera.older_step = dev->camera.old_step;
 353                 dev->camera.old_step = 0; /*it's going down*/
 354
 355                 /*check if it's oscillating and take smaller step if it is*/
 356                 if (dev->camera.old_step ^ dev->camera.older_step)
 357                         dev->camera.exposure_step /= 2;
 358                         /* oscilating - divide the step by 2 */
 359                 else
 360                         dev->camera.exposure_step += 2;
 361                         /* same direction - step must be bigger */
 362         }
 363
 364         return 0;
 365 }
 366