sn9c20x-bridge.c

   1 /**
   2  * @file sn9c20x.c
   3  * @author Dave Neuer
   4  * @date 2008-03-02
   5  *
   6  * @brief Common functions and data for the Sonix SN9C20x webcam bridge chips.
   7  *
   8  * @note Copyright (C) Dave Neuer
   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/delay.h>
  28 #include <linux/errno.h>
  29 #include <linux/string.h>
  30 #include "sn9c20x.h"
  31 #include "sn9c20x-bridge.h"
  32
  33 int sn9c20x_set_camera_control(struct usb_sn9c20x *dev,
  34         __u32 control, __u32 value)
  35 {
  36         int ret = -EINVAL;
  37         switch (control) {
  38         case V4L2_CID_CONTRAST:
  39                 if (dev->camera.set_contrast) {
  40                         dev->vsettings.contrast = value;
  41                         ret = dev->camera.set_contrast(dev);
  42                 }
  43                 break;
  44         case V4L2_CID_BRIGHTNESS:
  45                 if (dev->camera.set_brightness) {
  46                         dev->vsettings.brightness = value;
  47                         ret = dev->camera.set_brightness(dev);
  48                 }
  49                 break;
  50         case V4L2_CID_GAMMA:
  51                 if (dev->camera.set_gamma) {
  52                         dev->vsettings.gamma = value;
  53                         ret = dev->camera.set_gamma(dev);
  54                 }
  55                 break;
  56         case V4L2_CID_SHARPNESS:
  57                 if (dev->camera.set_sharpness) {
  58                         dev->vsettings.sharpness = value;
  59                         ret = dev->camera.set_sharpness(dev);
  60                 }
  61                 break;
  62         case V4L2_CID_RED_BALANCE:
  63                 if (dev->camera.set_red_gain) {
  64                         dev->vsettings.red_gain = value & 0x7f;
  65                         ret = dev->camera.set_red_gain(dev);
  66                 }
  67                 break;
  68         case V4L2_CID_BLUE_BALANCE:
  69                 if (dev->camera.set_blue_gain) {
  70                         dev->vsettings.blue_gain = value & 0x7f;
  71                         ret = dev->camera.set_blue_gain(dev);
  72                 }
  73                 break;
  74         case V4L2_CID_HFLIP:
  75                 if (dev->camera.set_hvflip) {
  76                         dev->vsettings.hflip = value;
  77                         ret = dev->camera.set_hvflip(dev);
  78                 }
  79                 break;
  80         case V4L2_CID_VFLIP:
  81                 if (dev->camera.set_hvflip) {
  82                         dev->vsettings.vflip = value;
  83                         ret = dev->camera.set_hvflip(dev);
  84                 }
  85                 break;
  86         case V4L2_CID_AUTOGAIN:
  87                 if (dev->camera.set_auto_gain) {
  88                         dev->vsettings.auto_gain = value;
  89                         ret = dev->camera.set_auto_gain(dev);
  90                 }
  91                 break;
  92         case V4L2_CID_EXPOSURE:
  93                 if (dev->camera.set_exposure) {
  94                         dev->vsettings.exposure = value;
  95                         ret = dev->camera.set_exposure(dev);
  96                 }
  97                 break;
  98         case V4L2_CID_GAIN:
  99                 if (dev->camera.set_gain) {
 100                         dev->vsettings.gain = value;
 101                         ret = dev->camera.set_gain(dev);
 102                 }
 103                 break;
 104         case V4L2_CID_AUTO_WHITE_BALANCE:
 105                 if (dev->camera.set_auto_whitebalance) {
 106                         dev->vsettings.auto_whitebalance = value;
 107                         ret = dev->camera.set_auto_whitebalance(dev);
 108                 }
 109                 break;
 110         case V4L2_CID_EXPOSURE_AUTO:
 111                 if (dev->camera.set_auto_exposure) {
 112                         dev->vsettings.auto_exposure = value;
 113                         ret = dev->camera.set_auto_exposure(dev);
 114                 }
 115                 break;
 116         }
 117         return ret;
 118 }
 119
 120 /**
 121  * @brief Switch Video stream on and off
 122  *
 123  * @param dev Pointer to device structure
 124  * @param enable On or off
 125  *
 126  * @author Brian Johnson
 127  *
 128  * @return 0 or negative error code
 129  *
 130  */
 131 int sn9c20x_enable_video(struct usb_sn9c20x *dev, int enable)
 132 {
 133         __u8 value;
 134         int ret;
 135
 136         ret = usb_sn9c20x_control_read(dev, 0x1061, &value, 1);
 137         if (ret < 0)
 138                 return ret;
 139
 140         if (enable) {
 141                 value |= 0x02;
 142                 ret = usb_sn9c20x_control_write(dev, 0x1061, &value, 1);
 143         } else {
 144                 value &= ~0x02;
 145                 ret = usb_sn9c20x_control_write(dev, 0x1061, &value, 1);
 146         }
 147
 148         sn9c20x_set_LEDs(dev, enable);
 149
 150         return ret;
 151 }
 152
 153 /**
 154  * @brief Switch LEDs on and off
 155  *
 156  * @param dev Pointer to device structure
 157  * @param enable On or off
 158  *
 159  * @author GWater
 160  *
 161  * @return 0 or negative error code
 162  *
 163  */
 164 int sn9c20x_set_LEDs(struct usb_sn9c20x *dev, int enable)
 165 {
 166         int ret;
 167         __u8 led[2];
 168
 169         int sensor = dev->camera.sensor;
 170
 171         if (enable) {
 172                 switch (sensor) {
 173                 case MT9M001_SENSOR:
 174                 case HV7131R_SENSOR:
 175                 case SOI968_SENSOR:
 176                         led[0] = 0x80;
 177                         led[1] = 0xa0;
 178                         break;
 179                 case MT9V011_SENSOR:
 180                 case OV7660_SENSOR:
 181                         led[0] = 0x40;
 182                         led[1] = 0x60;
 183                         break;
 184                 case MT9M111_SENSOR:
 185                         led[0] = 0x00;
 186                         led[1] = 0x60;
 187                         break;
 188                 case MT9V111_SENSOR:
 189                         led[0] = 0xc0;
 190                         led[1] = 0xe0;
 191                         break;
 192                 default:
 193                         led[0] = 0x00;
 194                         led[1] = 0x20;
 195                 }
 196         } else {
 197                 switch (sensor) {
 198                 case HV7131R_SENSOR:
 199                 case MT9M001_SENSOR:
 200                 case MT9V011_SENSOR:
 201                         led[0] = 0xa0;
 202                         led[1] = 0xa0;
 203                         break;
 204                 case MT9M111_SENSOR:
 205                 case OV7660_SENSOR:
 206                         led[0] = 0x20;
 207                         led[1] = 0x60;
 208                         break;
 209                 case MT9V111_SENSOR:
 210                         led[0] = 0x80;
 211                         led[1] = 0xe0;
 212                         break;
 213                 default:
 214                         led[0] = 0x20;
 215                         led[1] = 0x20;
 216                 }
 217         }
 218
 219         ret = usb_sn9c20x_control_write(dev, 0x1006, led, 2);
 220
 221         return ret;
 222 }
 223
 224 /**
 225  * @brief Initializes Micro-Controller's I2C interface
 226  *
 227  * @author Neekhil
 228  *
 229  * @param dev Pointer to the device
 230  *
 231  * @return Zero (success) or negative (USB-error value)
 232  *
 233  */
 234 int sn9c20x_i2c_initialize(struct usb_sn9c20x *dev)
 235 {
 236         __u8 buf[9];
 237         int ret;
 238
 239         dev->camera.i2c_flags = SN9C20X_I2C_2WIRE;
 240
 241         buf[0] = dev->camera.i2c_flags;
 242         buf[1] = dev->camera.address;
 243         buf[2] = 0x00;
 244         buf[3] = 0x00;
 245         buf[4] = 0x00;
 246         buf[5] = 0x00;
 247         buf[6] = 0x00;
 248         buf[7] = 0x00;
 249         buf[8] = 0x03;
 250         /*  Initialize I2C registers to avoid getting no ACK at first I2C operation: */
 251         /* Get green diagonal bands w/o this dummy write, Bridge does not know sensor address ? */
 252         ret = usb_sn9c20x_control_write(dev, 0x10c0, buf, 9);
 253         if (ret < 0)
 254                 return ret;
 255         else
 256                 return 0;
 257 }
 258
 259 /**
 260  * @brief Wait until the I2C slave is ready for the next operation
 261  *
 262  * @param dev Pointer to the device
 263  * @param highspeed
 264  * @param slave_error
 265  *
 266  * @return Zero for success or a negative error value
 267  *
 268  */
 269 int sn9c20x_i2c_ack_wait(struct usb_sn9c20x *dev, bool highspeed, bool *slave_error)
 270 {
 271         int ret, i;
 272         __u8 readbuf;
 273         int delay = highspeed ? 100 : 400;
 274
 275         for (i = 0; i < 5; i++) {
 276                 ret = usb_sn9c20x_control_read(dev, 0x10c0, &readbuf, 1);
 277
 278                 if (ret < 0)
 279                         return ret;
 280                 else if (readbuf & SN9C20X_I2C_ERROR) {
 281                         *slave_error = 1;
 282                         /* probably should come up w/ an error value and
 283                          * return it via the error return */
 284                         return 0;
 285                 } else if (readbuf & SN9C20X_I2C_READY)
 286                         return 0;
 287                 else
 288                         udelay(delay);
 289         }
 290         return -EBUSY;
 291 }
 292
 293 /**
 294  * @brief Read up to 5 bytes of data from an I2C slave
 295  *
 296  * @param dev Pointer to the device
 297  * @param nbytes Number of bytes to read
 298  * @param address The address of the register on the slave to read
 299  * @param result A pointer to the location at which the result should be stored
 300  *
 301  * @return Zero for success or a negative error value
 302  *
 303  */
 304 int sn9c20x_read_i2c_data(struct usb_sn9c20x *dev, __u8 nbytes,
 305         __u8 address, __u8 *result)
 306 {
 307         int ret, i, j;
 308         __u8 row[5];
 309
 310         if (!dev || nbytes > 4)
 311                 return -EINVAL;
 312
 313         /* first, we must do a dummy write of just the address */
 314         ret = sn9c20x_write_i2c_data(dev, 0, address, NULL);
 315         if (ret < 0)
 316                 return ret;
 317
 318         memset(row, 0, 5);
 319         /* now we issue the same command but with the read bit set
 320          * and no slave register address */
 321         dev->camera.i2c_flags |= SN9C20X_I2C_READ;
 322         ret = sn9c20x_write_i2c_data(dev, nbytes - 1, 0, row);
 323         dev->camera.i2c_flags &= ~SN9C20X_I2C_READ;
 324         if (ret < 0)
 325                 return ret;
 326
 327         /* finally, ask the bridge for the data */
 328         ret = usb_sn9c20x_control_read(dev, 0x10c2, row, 5);
 329         if (ret < 0)
 330                 return ret;
 331
 332         UDIA_DEBUG("I2C read: %02x %02x %02x %02x %02x %02x\n",
 333                 address, row[0], row[1], row[2], row[3], row[4]);
 334
 335         for (i = 0, j = 5 - nbytes; i < nbytes; i++, j++)
 336                 result[i] = row[j];
 337
 338         return 0;
 339 }
 340
 341 /**
 342  * @brief Read up to 4 bytes of data from an I2C slave an return them as 16bit values
 343  *
 344  * @param dev Pointer to the device
 345  * @param datalen Number of 16bit values to read
 346  * @param address The address of the register on the slave to read
 347  * @param result A pointer to the location at which the result should be stored
 348  *
 349  * @return Zero for success or a negative error value
 350  *
 351  */
 352 int sn9c20x_read_i2c_data16(struct usb_sn9c20x *dev, __u8 datalen,
 353         __u8 address, __u16 *result)
 354 {
 355         __u8 result8[4];
 356         __u8 k;
 357         int ret;
 358
 359         if (datalen > 2)
 360                 return -EINVAL;
 361         ret = sn9c20x_read_i2c_data(dev, 2*datalen, address, result8);
 362         for (k = 0; k < datalen; k++)
 363                 result[k] = (result8[k*2] << 8) | result8[k*2+1];
 364         return ret;
 365 }
 366
 367 static const char *wasread = "read from";
 368 static const char *waswrite = "write to";
 369
 370 /**
 371  * @brief Write up to 5 bytes of data to an I2C slave
 372  *
 373  * @param dev Pointer to the device
 374  * @param nbytes The number of bytes of data
 375  * @param address The address of the register on the slave to write
 376  * @param data An array containing the data to write
 377  * @param last_byte The byte to be sent as last byte of control sequence
 378  *
 379  * @return Zero for success or a negative error value
 380  *
 381  */
 382 int sn9c20x_write_i2c_data_ext(struct usb_sn9c20x *dev, __u8 nbytes,
 383         __u8 address, const __u8 data[nbytes], __u8 last_byte)
 384 {
 385         int ret, i;
 386         __u8 row[8];
 387         bool slave_error = 0;
 388
 389         if (!dev || (nbytes > 0 && !data) || nbytes > 4)
 390                 return -EINVAL;
 391
 392         /* from the point of view of the bridge, the length
 393          * includes the address */
 394         row[0] = dev->camera.i2c_flags | ((nbytes + 1) << 4);
 395         row[1] = dev->camera.address;
 396         row[2] = address;
 397         row[7] = last_byte;
 398
 399         for (i = 0; i < 4; i++)
 400                 row[i + 3] = i < nbytes ? data[i] : 0;
 401
 402         UDIA_DEBUG("I2C %s %02x: %02x %02x %02x %02x %02x %02x %02x %02x\n",
 403                 (dev->camera.i2c_flags & SN9C20X_I2C_READ ? wasread : waswrite),
 404                 address, row[0], row[1], row[2], row[3], row[4], row[5], row[6],
 405                 row[7]);
 406
 407         ret = usb_sn9c20x_control_write(dev, 0x10c0, row, 8);
 408         if (ret >= 0)
 409                 ret = sn9c20x_i2c_ack_wait(dev,
 410                         dev->camera.i2c_flags & SN9C20X_I2C_400KHZ,
 411                         &slave_error);
 412
 413         if (slave_error) {
 414                 UDIA_ERROR("I2C slave 0x%02x returned error during %s address 0x%02x\n",
 415                         dev->camera.address, (dev->camera.i2c_flags &
 416                         SN9C20X_I2C_READ ? wasread : waswrite), address);
 417                 return -1000;
 418                 /* there should be no interference with USB errors */
 419         }
 420
 421         if (ret < 0) {
 422                 /* we got no ack */
 423                 UDIA_ERROR("No ack from I2C slave 0x%02x for %s address 0x%02x\n",
 424                         dev->camera.address, (dev->camera.i2c_flags &
 425                         SN9C20X_I2C_READ ? wasread : waswrite), address);
 426                 return ret;
 427         }
 428
 429         return 0;
 430 }
 431
 432 /**
 433  * @brief Write up to 2 16bit values als single bytes to an I2C slave
 434  *
 435  * @param dev Pointer to the device
 436  * @param datalen The number of 16bit data values to write
 437  * @param address The address of the register on the slave to write
 438  * @param data An array containing the data to write
 439  *
 440  * @return Zero for success or a negative error value
 441  *
 442  */
 443 int sn9c20x_write_i2c_data16(struct usb_sn9c20x *dev, __u8 datalen,
 444         __u8 address, const __u16 data[datalen])
 445 {
 446         __u8 data8[4];
 447         __u8 k;
 448         int ret;
 449
 450         if (datalen > 2)
 451                 return -EINVAL;
 452         for (k = 0; k < datalen; k++) {
 453                 data8[k*2] = data[k] >> 8;
 454                 data8[k*2+1] = data[k] & 0xff;
 455         }
 456         ret = sn9c20x_write_i2c_data(dev, 2*datalen, address, data8);
 457         return ret;
 458 }
 459
 460 int sn9c20x_write_i2c_array(struct usb_sn9c20x *dev,
 461         struct sn9c20x_i2c_regs *regs, int bits16)
 462 {
 463         int i;
 464         int ret = 0;
 465         __u16 value16;
 466         __u8 value8;
 467         for (i = 0;; i++) {
 468                 if (regs[i].address == 0xff)
 469                         break;
 470                 if (bits16) {
 471                         value16 = regs[i].value;
 472                         ret = sn9c20x_write_i2c_data16(dev, 1,
 473                                 regs[i].address, &value16);
 474                 } else {
 475                         value8 = (__u8)regs[i].value;
 476                         ret = sn9c20x_write_i2c_data(dev, 1,
 477                                 regs[i].address, &value8);
 478                 }
 479                 if (ret < 0)
 480                         return ret;
 481         }
 482         return ret;
 483 }
 484
 485 /**
 486  * @brief Set contrast inside sn9c20x chip
 487  *
 488  * @author Comer352l
 489  *
 490  * @param dev Pointer to the device
 491  *
 492  * @return Zero (success) or negative (USB-error value)
 493  *
 494  */
 495 int sn9c20x_set_contrast(struct usb_sn9c20x *dev)
 496 {
 497         /* from 0x26 to 0x4b */
 498         __u8 brightness_contrast[21] = {0x16, 0x0, 0x2b, 0x0, 0x8, 0x0, 0xf6, 0x0f,
 499                                 0xd2, 0x0f, 0x38, 0x0, 0x34, 0x0, 0xcf, 0x0f,
 500                                 0xfd, 0x0f, 0x0, 0x0, 0x0};
 501         __u8 contrast_val = (dev->vsettings.contrast) * 0x25 / 0x100;
 502         __u8 brightness_val = dev->vsettings.brightness;
 503
 504         brightness_val -= 0x80;
 505         brightness_contrast[18] = brightness_val;
 506
 507         contrast_val += 0x26;
 508         brightness_contrast[2] = contrast_val;
 509         brightness_contrast[0] = 0x13 + (brightness_contrast[2] - 0x26) * 0x13 / 0x25;
 510         brightness_contrast[4] = 0x7 + (brightness_contrast[2] - 0x26) * 0x7 / 0x25;
 511
 512         return usb_sn9c20x_control_write(dev, 0x10e1, brightness_contrast, 21);
 513 }
 514
 515 /**
 516  * @brief Set brightness inside sn9c20x chip
 517  *
 518  * @author Comer352l
 519  *
 520  * @param dev Pointer to the device
 521  *
 522  * @return Zero (success) or negative (USB-error value)
 523  *
 524  * Wrapper for sn9c20x_set_contrast
 525  *
 526  */
 527 int sn9c20x_set_brightness(struct usb_sn9c20x *dev)
 528 {
 529         return sn9c20x_set_contrast(dev);
 530 }
 531
 532 /**
 533  * @brief Set gamma inside sn9c20x chip
 534  *
 535  * @author Comer352l
 536  *
 537  * @param dev Pointer to the device
 538  *
 539  * @return Zero (success) or negative (USB-error value)
 540  *
 541  */
 542 int sn9c20x_set_gamma(struct usb_sn9c20x *dev)
 543 {
 544         int value = (dev->vsettings.gamma) * 0xb8 / 0x100;
 545         int r = 0;
 546
 547         __u8 gamma_val[17] = {0x0a, 0x13, 0x25, 0x37, 0x45, 0x55, 0x65, 0x74,
 548                         0x83, 0x92, 0xa1, 0xb0, 0xbf, 0xce, 0xdf, 0xea, 0xf5};
 549
 550         gamma_val[0] = 0x0a;
 551         gamma_val[1] = 0x13 + (value * (0xcb - 0x13) / 0xb8);
 552         gamma_val[2] = 0x25 + (value * (0xee - 0x25) / 0xb8);
 553         gamma_val[3] = 0x37 + (value * (0xfa - 0x37) / 0xb8);
 554         gamma_val[4] = 0x45 + (value * (0xfc - 0x45) / 0xb8);
 555         gamma_val[5] = 0x55 + (value * (0xfb - 0x55) / 0xb8);
 556         gamma_val[6] = 0x65 + (value * (0xfc - 0x65) / 0xb8);
 557         gamma_val[7] = 0x74 + (value * (0xfd - 0x74) / 0xb8);
 558         gamma_val[8] = 0x83 + (value * (0xfe - 0x83) / 0xb8);
 559         gamma_val[9] = 0x92 + (value * (0xfc - 0x92) / 0xb8);
 560         gamma_val[10] = 0xa1 + (value * (0xfc - 0xa1) / 0xb8);
 561         gamma_val[11] = 0xb0 + (value * (0xfc - 0xb0) / 0xb8);
 562         gamma_val[12] = 0xbf + (value * (0xfb - 0xbf) / 0xb8);
 563         gamma_val[13] = 0xce + (value * (0xfb - 0xce) / 0xb8);
 564         gamma_val[14] = 0xdf + (value * (0xfd - 0xdf) / 0xb8);
 565         gamma_val[15] = 0xea + (value * (0xf9 - 0xea) / 0xb8);
 566         gamma_val[16] = 0xf5;
 567
 568         r = usb_sn9c20x_control_write(dev, 0x1190, gamma_val, 17);
 569
 570         return r;
 571 }
 572
 573 /**
 574  * @brief Set sharpness inside sn9c20x chip
 575  *
 576  * @author Comer352l
 577  *
 578  * @param dev Pointer to the device
 579  *
 580  * @return Zero (success) or negative (USB-error value)
 581  *
 582  */
 583 int sn9c20x_set_sharpness(struct usb_sn9c20x *dev)
 584 {
 585         __u8 val[1];
 586         int ret;
 587
 588         ret = usb_sn9c20x_control_read(dev, SN9C20X_SHARPNESS, val, 1);
 589         if (ret < 0)
 590                 return ret;
 591         val[0] = (val[0] & 0xc0) | (dev->vsettings.sharpness & 0x3f);
 592         ret = usb_sn9c20x_control_write(dev, SN9C20X_SHARPNESS, val, 1);
 593         if (ret < 0)
 594                 return ret;
 595         else
 596                 return 0;
 597 }
 598
 599 /**
 600  * @brief Set red gain inside sn9c20x chip
 601  *
 602  * @author Brian Johnson
 603  *
 604  * @param dev Pointer to the device
 605  *
 606  * @return Zero (success) or negative (USB-error value)
 607  *
 608  */
 609 int sn9c20x_set_red_gain(struct usb_sn9c20x *dev)
 610 {
 611         __u8 val;
 612         int ret;
 613
 614         val = dev->vsettings.red_gain;
 615         ret = usb_sn9c20x_control_write(dev, SN9C20X_RED_GAIN, &val, 1);
 616         if (ret < 0)
 617                 return ret;
 618         else
 619                 return 0;
 620 }
 621
 622 /**
 623  * @brief Set blue gain inside sn9c20x chip
 624  *
 625  * @author Brian Johnson
 626  *
 627  * @param dev Pointer to the device
 628  *
 629  * @return Zero (success) or negative (USB-error value)
 630  *
 631  */
 632 int sn9c20x_set_blue_gain(struct usb_sn9c20x *dev)
 633 {
 634         __u8 val;
 635         int ret;
 636
 637         val = dev->vsettings.blue_gain;
 638         ret = usb_sn9c20x_control_write(dev, SN9C20X_BLUE_GAIN, &val, 1);
 639         if (ret < 0)
 640                 return ret;
 641         else
 642                 return 0;
 643 }
 644
 645
 646 /**
 647  * @brief Calculate closest resolution to input from application
 648  *
 649  * @author Brian Johnson
 650  *
 651  * @param dev Pointer to the device structure
 652  * @param width Requested width of video stream
 653  * @param height Requested height of video stream
 654  *
 655  * @retval width Closest possible width of video stream
 656  * @retval height Closest possible height of video stream
 657  *
 658  * @return Number of the
 659  *
 660  */
 661 int sn9c20x_get_closest_resolution(struct usb_sn9c20x *dev,
 662         int *width, int *height)
 663 {
 664         int i;
 665
 666         for (i = SN9C20X_N_MODES - 1; i >= 0; i--) {
 667                 if (*width >= sn9c20x_modes[i].width
 668                     && *height >= sn9c20x_modes[i].height)
 669                         break;
 670         }
 671
 672         *width = sn9c20x_modes[i].width;
 673         *height = sn9c20x_modes[i].height;
 674
 675         return i;
 676 }
 677
 678 /**
 679  * @brief Set resolution inside sn9c20x chip
 680  *
 681  * @author Brian Johnson
 682  *
 683  * @param dev Pointer to the device
 684  * @param width Width
 685  * @param height Height
 686  *
 687  * @return 0
 688  *
 689  */
 690 int sn9c20x_set_resolution(struct usb_sn9c20x *dev,
 691         int width, int height)
 692 {
 693         int ret;
 694         __u8 scale;
 695         __u8 window[6];
 696         __u8 clrwindow[5];
 697         struct sn9c20x_video_mode *mode;
 698
 699         ret = sn9c20x_get_closest_resolution(dev, &width, &height);
 700
 701         mode = &sn9c20x_modes[ret];
 702
 703         dev->vsettings.format.width = mode->width;
 704         dev->vsettings.format.height = mode->height;
 705
 706         clrwindow[0] = 0;
 707         clrwindow[1] = mode->width  >> 2;
 708         clrwindow[2] = 0;
 709         clrwindow[3] = mode->height >> 1;
 710         clrwindow[4] = ((mode->width >> 10) & 0x01) |
 711                                 ((mode->height >> 10) & 0x06);
 712
 713         scale = mode->scale;
 714
 715         window[0] = (mode->window[0] + dev->camera.hstart) & 0xff;
 716         window[1] = (mode->window[0] + dev->camera.hstart) >> 8;
 717         window[2] = (mode->window[1] + dev->camera.vstart) & 0xff;
 718         window[3] = (mode->window[1] + dev->camera.vstart) >> 8;
 719         window[4] = mode->window[2] >> 4;
 720         window[5] = mode->window[3] >> 3;
 721
 722         usb_sn9c20x_control_write(dev, 0x10fb, clrwindow, 5);
 723         usb_sn9c20x_control_write(dev, 0x1180, window, 6);
 724         usb_sn9c20x_control_write(dev, SN9C20X_SCALE, &scale, 1);
 725
 726         UDIA_DEBUG("Set mode [%dx%d]\n", mode->width, mode->height);
 727
 728         return 0;
 729 }
 730
 731
 732 int sn9c20x_set_format(struct usb_sn9c20x *dev, __u32 format)
 733 {
 734         int i;
 735         int ret = -EINVAL;
 736         for (i = 0; i < SN9C20X_N_FMTS; i++) {
 737                 if (sn9c20x_fmts[i].pix_fmt == format) {
 738                         dev->vsettings.format.bytesperline =
 739                                 dev->vsettings.format.width *
 740                                 sn9c20x_fmts[i].depth / 8;
 741                         dev->vsettings.format.sizeimage =
 742                                 dev->vsettings.format.height *
 743                                 dev->vsettings.format.bytesperline;
 744                         dev->vsettings.format.pixelformat = format;
 745                         dev->vsettings.format.colorspace = V4L2_COLORSPACE_SRGB;
 746                         dev->vsettings.format.priv = 0;
 747                         sn9c20x_fmts[i].set_format(dev);
 748                         ret = 0;
 749                         break;
 750                 }
 751         }
 752         return ret;
 753 }
 754
 755 void sn9c20x_set_raw(struct usb_sn9c20x *dev)
 756 {
 757         __u8 value;
 758         value = 0x2d;
 759         usb_sn9c20x_control_write(dev, 0x10e0, &value, 1);
 760 }
 761
 762 void sn9c20x_set_jpeg(struct usb_sn9c20x *dev)
 763 {
 764         __u8 value;
 765         value = 0x2c;
 766         usb_sn9c20x_control_write(dev, 0x10e0, &value, 1);
 767 }
 768
 769 void sn9c20x_set_yuv420(struct usb_sn9c20x *dev)
 770 {
 771         __u8 value;
 772         value = 0x2f;
 773         usb_sn9c20x_control_write(dev, 0x10e0, &value, 1);
 774 }
 775
 776 void sn9c20x_set_yuv422(struct usb_sn9c20x *dev)
 777 {
 778         __u8 value;
 779         value = 0x2e;
 780         usb_sn9c20x_control_write(dev, 0x10e0, &value, 1);
 781 }
 782
 783 /**
 784  * @brief This function initializes the SN9C20x bridge,
 785  * these are the bare minimum writes that must be done for
 786  * the bridge to work correctly.
 787  *
 788  * @author Neekhil
 789  *
 790  * @param dev Pointer to the device
 791  *
 792  * @return Zero for success or error value
 793  *
 794  */
 795 int sn9c20x_initialize(struct usb_sn9c20x *dev)
 796 {
 797         int ret, i;
 798
 799         __u16 reg;
 800         __u8 value;
 801
 802         __u16 regs[][2] = {
 803                 {0x1000, 0x78},
 804                 {0x1001, 0x40},
 805                 {0x1002, 0x1c},
 806                 {0x1020, 0x80},
 807                 {0x1061, 0x01},
 808                 {0x1067, 0x40},
 809                 {0x1068, 0x30},
 810                 {0x1069, 0x20},
 811                 {0x106a, 0x10},
 812                 {0x106b, 0x08},
 813                 {0x1188, 0x87},
 814                 {0x11a1, 0x00},
 815                 {0x11a2, 0x00},
 816                 {0x11a3, 0x6a},
 817                 {0x11a4, 0x50},
 818                 {0x11ab, 0x00},
 819                 {0x11ac, 0x00},
 820                 {0x11ad, 0x50},
 821                 {0x11ae, 0x3c},
 822                 {0x118a, 0x04},
 823                 {0x0395, 0x04},
 824                 {0x11b8, 0x3a},
 825                 {0x118b, 0x0e},
 826                 {0x10f7, 0x05},
 827                 {0x10f8, 0x14},
 828                 {0x10fa, 0xff},
 829                 {0x10f9, 0x00},
 830                 {0x11ba, 0x0a},
 831                 {0x11a5, 0x2d},
 832                 {0x11a6, 0x2d},
 833                 {0x11a7, 0x3a},
 834                 {0x11a8, 0x05},
 835                 {0x11a9, 0x04},
 836                 {0x11aa, 0x3f},
 837                 {0x11af, 0x28},
 838                 {0x11b0, 0xd8},
 839                 {0x11b1, 0x14},
 840                 {0x11b2, 0xec},
 841                 {0x11b3, 0x32},
 842                 {0x11b4, 0xdd},
 843                 {0x11b5, 0x32},
 844                 {0x11b6, 0xdd},
 845                 {0x10e0, 0x2c},
 846                 {0x11bc, 0x40},
 847                 {0x11bd, 0x01},
 848                 {0x11be, 0xf0},
 849                 {0x11bf, 0x00},
 850                 {0x118c, 0x1f},
 851                 {0x118d, 0x1f},
 852                 {0x118e, 0x1f},
 853                 {0x118f, 0x1f},
 854                 {0x1180, 0x01},
 855                 {0x1181, 0x00},
 856                 {0x1182, 0x01},
 857                 {0x1183, 0x00},
 858                 {0x1184, 0x50},
 859                 {0x1185, 0x80},
 860         };
 861
 862         __u8 qtable1[64] = {
 863                 0x0d, 0x08, 0x08, 0x0d, 0x08, 0x08, 0x0d, 0x0d,
 864                 0x0d, 0x0d, 0x11, 0x0d, 0x0d, 0x11, 0x15, 0x21,
 865                 0x15, 0x15, 0x11, 0x11, 0x15, 0x2a, 0x1d, 0x1d,
 866                 0x19, 0x21, 0x32, 0x2a, 0x32, 0x32, 0x2e, 0x2a,
 867                 0x2e, 0x2e, 0x36, 0x3a, 0x4b, 0x43, 0x36, 0x3a,
 868                 0x47, 0x3a, 0x2e, 0x2e, 0x43, 0x5c, 0x43, 0x47,
 869                 0x4f, 0x54, 0x58, 0x58, 0x58, 0x32, 0x3f, 0x60,
 870                 0x64, 0x5c, 0x54, 0x64, 0x4b, 0x54, 0x58, 0x54
 871         };
 872
 873         __u8 qtable2[64] = {
 874                 0x0d, 0x11, 0x11, 0x15, 0x11, 0x15, 0x26, 0x15,
 875                 0x15, 0x26, 0x54, 0x36, 0x2e, 0x36, 0x54, 0x54,
 876                 0x54, 0x54, 0x54, 0x54, 0x54, 0x54, 0x54, 0x54,
 877                 0x54, 0x54, 0x54, 0x54, 0x54, 0x54, 0x54, 0x54,
 878                 0x54, 0x54, 0x54, 0x54, 0x54, 0x54, 0x54, 0x54,
 879                 0x54, 0x54, 0x54, 0x54, 0x54, 0x54, 0x54, 0x54,
 880                 0x54, 0x54, 0x54, 0x54, 0x54, 0x54, 0x54, 0x54,
 881                 0x54, 0x54, 0x54, 0x54, 0x54, 0x54, 0x54, 0x54
 882         };
 883
 884         for (i = 0; i < ARRAY_SIZE(regs); i++) {
 885                 reg = regs[i][0];
 886                 value = regs[i][1];
 887                 ret = usb_sn9c20x_control_write(dev, reg, &value, 1);
 888                 if (ret < 0) {
 889                         UDIA_INFO("Bridge Init Error (%d). line %d\n", ret, i);
 890                         goto err;
 891                 }
 892         }
 893
 894         ret = usb_sn9c20x_control_write(dev, 0x1100, qtable1, 64);
 895         if (ret < 0)
 896                 goto err;
 897
 898         ret = usb_sn9c20x_control_write(dev, 0x1140, qtable2, 64);
 899         if (ret < 0)
 900                 goto err;
 901
 902         dev->camera.set_contrast = sn9c20x_set_contrast;
 903         dev->camera.set_brightness = sn9c20x_set_brightness;
 904         dev->camera.set_gamma = sn9c20x_set_gamma;
 905         dev->camera.set_sharpness = sn9c20x_set_sharpness;
 906         dev->camera.set_red_gain = sn9c20x_set_red_gain;
 907         dev->camera.set_blue_gain = sn9c20x_set_blue_gain;
 908
 909         ret = sn9c20x_i2c_initialize(dev);
 910         if (ret < 0)
 911                 goto err;
 912
 913         ret = sn9c20x_initialize_sensor(dev);
 914         return ret;
 915
 916 err:
 917         UDIA_ERROR("Device Init failed (%d)!\n", ret);
 918         return ret;
 919 }