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 = 80;
 116         dev->camera.max_yavg = 130;
 117         dev->camera.old_step = 0;
 118         dev->camera.older_step = 0;
 119         dev->camera.exposure_step = 16;
 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.set_auto_whitebalance = soi968_set_autowhitebalance;
 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.set_gain = ov9650_set_gain;
 176                 dev->camera.hstart = 1;
 177                 dev->camera.vstart = 1;
 178                 UDIA_INFO("Detected OV7660 Sensor.\n");
 179                 break;
 180         case MT9V111_SENSOR:
 181                 sn9c20x_write_i2c_array(dev, mt9v111_init, 1);
 182                 dev->camera.set_hvflip = mt9v111_set_hvflip;
 183                 dev->camera.set_exposure = mt9v111_set_exposure;
 184                 dev->camera.set_auto_exposure = mt9v111_set_autoexposure;
 185                 dev->camera.set_auto_whitebalance = mt9v111_set_autowhitebalance;
 186                 dev->camera.hstart = 2;
 187                 dev->camera.vstart = 2;
 188                 UDIA_INFO("Detected MT9V111 Sensor.\n");
 189                 break;
 190         case MT9V112_SENSOR:
 191                 sn9c20x_write_i2c_array(dev, mt9v112_init, 1);
 192                 dev->camera.set_hvflip = mt9v112_set_hvflip;
 193                 dev->camera.hstart = 6;
 194                 dev->camera.vstart = 2;
 195                 UDIA_INFO("Detected MT9V112 Sensor.\n");
 196                 break;
 197         case MT9M111_SENSOR:
 198                 sn9c20x_write_i2c_array(dev, mt9m111_init, 1);
 199                 dev->camera.set_exposure = mt9m111_set_exposure;
 200                 dev->camera.set_auto_exposure = mt9m111_set_autoexposure;
 201                 dev->camera.set_auto_whitebalance = mt9m111_set_autowhitebalance;
 202                 dev->camera.hstart = 0;
 203                 dev->camera.vstart = 2;
 204                 UDIA_INFO("Detected MT9M111 Sensor.\n");
 205                 break;
 206         case MT9V011_SENSOR:
 207                 sn9c20x_write_i2c_array(dev, mt9v011_init, 1);
 208                 dev->camera.set_hvflip = mt9v011_set_hvflip;
 209                 dev->camera.set_exposure = mt9v011_set_exposure;
 210                 dev->camera.hstart = 2;
 211                 dev->camera.vstart = 2;
 212                 UDIA_INFO("Detected MT9V011 Sensor.\n");
 213                 break;
 214         case MT9M001_SENSOR:
 215                 sn9c20x_write_i2c_array(dev, mt9m001_init, 1);
 216                 dev->camera.hstart = 2;
 217                 dev->camera.vstart = 2;
 218                 UDIA_INFO("Detected MT9M001 Sensor.\n");
 219                 break;
 220         case HV7131R_SENSOR:
 221                 dev->camera.i2c_flags |= SN9C20X_I2C_400KHZ;
 222                 sn9c20x_write_i2c_array(dev, hv7131r_init, 0);
 223                 dev->camera.set_hvflip = hv7131r_set_hvflip;
 224                 dev->camera.set_gain = hv7131r_set_gain;
 225                 dev->camera.set_exposure = hv7131r_set_exposure;
 226                 dev->camera.hstart = 0;
 227                 dev->camera.vstart = 1;
 228                 UDIA_INFO("Detected HV7131R Sensor.\n");
 229                 break;
 230         default:
 231                 ret = -EINVAL;
 232                 UDIA_INFO("Unsupported sensor.\n");
 233         }
 234         return ret;
 235 }
 236
 237
 238 /**
 239  * @brief Wrapper function to detect hardware states
 240  *
 241  * @param dev Pointer to device structure
 242  *
 243  * @returns 0
 244  */
 245 int dev_sn9c20x_call_constantly(struct usb_sn9c20x *dev)
 246 {
 247
 248         /* Know to be broken, temporarely disabled */
 249         /*dev_sn9c20x_flip_detection(dev);*/
 250         if (!dev->camera.set_auto_exposure &&
 251                 dev->vsettings.auto_exposure) {
 252                 dev_sn9c20x_perform_soft_ae(dev);
 253         }
 254
 255         return 0;
 256 }
 257
 258 /**
 259  * @brief Wrapper function to detect a flipped sensor
 260  *
 261  * @param dev Pointer to device structure
 262  *
 263  * @returns 0 or negative error value
 264  *
 265  */
 266 int dev_sn9c20x_flip_detection(struct usb_sn9c20x *dev)
 267 {
 268         int ret = -ENODEV;
 269         if (dev && dev->camera.flip_detect)
 270                 ret = dev->camera.flip_detect(dev);
 271         return ret;
 272 }
 273
 274 /**
 275  * @brief Perform software autoexposure
 276  *
 277  * @param dev
 278  *
 279  * @returns 0 or negative error value
 280  *
 281  * @author Stefan Krastanov
 282  */
 283 int dev_sn9c20x_perform_soft_ae(struct usb_sn9c20x *dev)
 284 {
 285         int yavg, new_exp;
 286         yavg = -1;
 287
 288         if (!dev->camera.set_exposure)
 289                 return -1;
 290         yavg = atomic_read(&dev->camera.yavg);
 291
 292         UDIA_DEBUG("Sensor YAVG: %d\n", yavg);
 293         if (yavg < 0) {
 294                 /* Can't get YAVG - we have nothing to do */
 295                 return -1;
 296         }
 297
 298         /*some hardcoded values are present
 299          *like those for maximal/minimal exposure
 300          *and exposure steps*/
 301
 302         /* image too dark */
 303         if (yavg < dev->camera.min_yavg) {
 304                 /*worst case - exposure is allready maximal*/
 305                 if (dev->vsettings.exposure > 0xf5)
 306                         return 0;
 307                 /*change exposure just a bit*/
 308                 new_exp = dev->vsettings.exposure + dev->camera.exposure_step;
 309                 if (new_exp > 0xff)
 310                         new_exp = 0xff;
 311                 if (new_exp < 0x1)
 312                         new_exp = 1;
 313                 /*set it*/
 314                 dev->vsettings.exposure = new_exp;
 315                 dev->camera.set_exposure(dev);
 316                 /*note the direction of the change*/
 317                 dev->camera.older_step = dev->camera.old_step;
 318                 dev->camera.old_step = 1; /*it's going up*/
 319
 320                 /*check if it's oscillating and take smaller step if it is*/
 321                 if (dev->camera.old_step ^ dev->camera.older_step)
 322                         dev->camera.exposure_step /= 2;
 323                         /* oscilating - divide the step by 2 */
 324                 else
 325                         dev->camera.exposure_step += 2;
 326                         /* same direction - step must be bigger */
 327         }
 328         /*image too light*/
 329         if (yavg > dev->camera.max_yavg) {
 330                 /*worst case - exposure is allready minimal*/
 331                 if (dev->vsettings.exposure < 0x10)
 332                         return 0;
 333                 /*change exposure just a bit*/
 334                 new_exp = dev->vsettings.exposure - dev->camera.exposure_step;
 335                 if (new_exp > 0xff)
 336                         new_exp = 0xff;
 337                 if (new_exp < 0x1)
 338                         new_exp = 1;
 339                 /*set it*/
 340                 dev->vsettings.exposure = new_exp;
 341                 dev->camera.set_exposure(dev);
 342                 /*note the direction of the change*/
 343                 dev->camera.older_step = dev->camera.old_step;
 344                 dev->camera.old_step = 0; /*it's going down*/
 345
 346                 /*check if it's oscillating and take smaller step if it is*/
 347                 if (dev->camera.old_step ^ dev->camera.older_step)
 348                         dev->camera.exposure_step /= 2;
 349                         /* oscilating - divide the step by 2 */
 350                 else
 351                         dev->camera.exposure_step += 2;
 352                         /* same direction - step must be bigger */
 353         }
 354
 355         return 0;
 356 }
 357