Pileus Git - ~andy/linux/blob - drivers/media/usb/gspca/m5602/m5602_s5k4aa.c

   1 /*
   2  * Driver for the s5k4aa sensor
   3  *
   4  * Copyright (C) 2008 Erik Andrén
   5  * Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
   6  * Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
   7  *
   8  * Portions of code to USB interface and ALi driver software,
   9  * Copyright (c) 2006 Willem Duinker
  10  * v4l2 interface modeled after the V4L2 driver
  11  * for SN9C10x PC Camera Controllers
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License as
  15  * published by the Free Software Foundation, version 2.
  16  *
  17  */
  18
  19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  20
  21 #include "m5602_s5k4aa.h"
  22
  23 static int s5k4aa_get_exposure(struct gspca_dev *gspca_dev, __s32 *val);
  24 static int s5k4aa_set_exposure(struct gspca_dev *gspca_dev, __s32 val);
  25 static int s5k4aa_get_vflip(struct gspca_dev *gspca_dev, __s32 *val);
  26 static int s5k4aa_set_vflip(struct gspca_dev *gspca_dev, __s32 val);
  27 static int s5k4aa_get_hflip(struct gspca_dev *gspca_dev, __s32 *val);
  28 static int s5k4aa_set_hflip(struct gspca_dev *gspca_dev, __s32 val);
  29 static int s5k4aa_get_gain(struct gspca_dev *gspca_dev, __s32 *val);
  30 static int s5k4aa_set_gain(struct gspca_dev *gspca_dev, __s32 val);
  31 static int s5k4aa_get_noise(struct gspca_dev *gspca_dev, __s32 *val);
  32 static int s5k4aa_set_noise(struct gspca_dev *gspca_dev, __s32 val);
  33 static int s5k4aa_get_brightness(struct gspca_dev *gspca_dev, __s32 *val);
  34 static int s5k4aa_set_brightness(struct gspca_dev *gspca_dev, __s32 val);
  35
  36 static
  37     const
  38         struct dmi_system_id s5k4aa_vflip_dmi_table[] = {
  39         {
  40                 .ident = "BRUNEINIT",
  41                 .matches = {
  42                         DMI_MATCH(DMI_SYS_VENDOR, "BRUNENIT"),
  43                         DMI_MATCH(DMI_PRODUCT_NAME, "BRUNENIT"),
  44                         DMI_MATCH(DMI_BOARD_VERSION, "00030D0000000001")
  45                 }
  46         }, {
  47                 .ident = "Fujitsu-Siemens Amilo Xa 2528",
  48                 .matches = {
  49                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
  50                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Xa 2528")
  51                 }
  52         }, {
  53                 .ident = "Fujitsu-Siemens Amilo Xi 2428",
  54                 .matches = {
  55                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
  56                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Xi 2428")
  57                 }
  58         }, {
  59                 .ident = "Fujitsu-Siemens Amilo Xi 2528",
  60                 .matches = {
  61                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
  62                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Xi 2528")
  63                 }
  64         }, {
  65                 .ident = "Fujitsu-Siemens Amilo Xi 2550",
  66                 .matches = {
  67                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
  68                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Xi 2550")
  69                 }
  70         }, {
  71                 .ident = "Fujitsu-Siemens Amilo Pa 2548",
  72                 .matches = {
  73                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
  74                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pa 2548")
  75                 }
  76         }, {
  77                 .ident = "Fujitsu-Siemens Amilo Pi 2530",
  78                 .matches = {
  79                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
  80                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pi 2530")
  81                 }
  82         }, {
  83                 .ident = "MSI GX700",
  84                 .matches = {
  85                         DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
  86                         DMI_MATCH(DMI_PRODUCT_NAME, "GX700"),
  87                         DMI_MATCH(DMI_BIOS_DATE, "12/02/2008")
  88                 }
  89         }, {
  90                 .ident = "MSI GX700",
  91                 .matches = {
  92                         DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
  93                         DMI_MATCH(DMI_PRODUCT_NAME, "GX700"),
  94                         DMI_MATCH(DMI_BIOS_DATE, "07/26/2007")
  95                 }
  96         }, {
  97                 .ident = "MSI GX700",
  98                 .matches = {
  99                         DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
 100                         DMI_MATCH(DMI_PRODUCT_NAME, "GX700"),
 101                         DMI_MATCH(DMI_BIOS_DATE, "07/19/2007")
 102                 }
 103         }, {
 104                 .ident = "MSI GX700/GX705/EX700",
 105                 .matches = {
 106                         DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
 107                         DMI_MATCH(DMI_PRODUCT_NAME, "GX700/GX705/EX700")
 108                 }
 109         }, {
 110                 .ident = "MSI L735",
 111                 .matches = {
 112                         DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
 113                         DMI_MATCH(DMI_PRODUCT_NAME, "MS-1717X")
 114                 }
 115         }, {
 116                 .ident = "Lenovo Y300",
 117                 .matches = {
 118                         DMI_MATCH(DMI_SYS_VENDOR, "L3000 Y300"),
 119                         DMI_MATCH(DMI_PRODUCT_NAME, "Y300")
 120                 }
 121         },
 122         { }
 123 };
 124
 125 static struct v4l2_pix_format s5k4aa_modes[] = {
 126         {
 127                 640,
 128                 480,
 129                 V4L2_PIX_FMT_SBGGR8,
 130                 V4L2_FIELD_NONE,
 131                 .sizeimage =
 132                         640 * 480,
 133                 .bytesperline = 640,
 134                 .colorspace = V4L2_COLORSPACE_SRGB,
 135                 .priv = 0
 136         },
 137         {
 138                 1280,
 139                 1024,
 140                 V4L2_PIX_FMT_SBGGR8,
 141                 V4L2_FIELD_NONE,
 142                 .sizeimage =
 143                         1280 * 1024,
 144                 .bytesperline = 1280,
 145                 .colorspace = V4L2_COLORSPACE_SRGB,
 146                 .priv = 0
 147         }
 148 };
 149
 150 static const struct ctrl s5k4aa_ctrls[] = {
 151 #define VFLIP_IDX 0
 152         {
 153                 {
 154                         .id             = V4L2_CID_VFLIP,
 155                         .type           = V4L2_CTRL_TYPE_BOOLEAN,
 156                         .name           = "vertical flip",
 157                         .minimum        = 0,
 158                         .maximum        = 1,
 159                         .step           = 1,
 160                         .default_value  = 0
 161                 },
 162                 .set = s5k4aa_set_vflip,
 163                 .get = s5k4aa_get_vflip
 164         },
 165 #define HFLIP_IDX 1
 166         {
 167                 {
 168                         .id             = V4L2_CID_HFLIP,
 169                         .type           = V4L2_CTRL_TYPE_BOOLEAN,
 170                         .name           = "horizontal flip",
 171                         .minimum        = 0,
 172                         .maximum        = 1,
 173                         .step           = 1,
 174                         .default_value  = 0
 175                 },
 176                 .set = s5k4aa_set_hflip,
 177                 .get = s5k4aa_get_hflip
 178         },
 179 #define GAIN_IDX 2
 180         {
 181                 {
 182                         .id             = V4L2_CID_GAIN,
 183                         .type           = V4L2_CTRL_TYPE_INTEGER,
 184                         .name           = "Gain",
 185                         .minimum        = 0,
 186                         .maximum        = 127,
 187                         .step           = 1,
 188                         .default_value  = S5K4AA_DEFAULT_GAIN,
 189                         .flags          = V4L2_CTRL_FLAG_SLIDER
 190                 },
 191                 .set = s5k4aa_set_gain,
 192                 .get = s5k4aa_get_gain
 193         },
 194 #define EXPOSURE_IDX 3
 195         {
 196                 {
 197                         .id             = V4L2_CID_EXPOSURE,
 198                         .type           = V4L2_CTRL_TYPE_INTEGER,
 199                         .name           = "Exposure",
 200                         .minimum        = 13,
 201                         .maximum        = 0xfff,
 202                         .step           = 1,
 203                         .default_value  = 0x100,
 204                         .flags          = V4L2_CTRL_FLAG_SLIDER
 205                 },
 206                 .set = s5k4aa_set_exposure,
 207                 .get = s5k4aa_get_exposure
 208         },
 209 #define NOISE_SUPP_IDX 4
 210         {
 211                 {
 212                         .id             = V4L2_CID_PRIVATE_BASE,
 213                         .type           = V4L2_CTRL_TYPE_BOOLEAN,
 214                         .name           = "Noise suppression (smoothing)",
 215                         .minimum        = 0,
 216                         .maximum        = 1,
 217                         .step           = 1,
 218                         .default_value  = 1,
 219                 },
 220                         .set = s5k4aa_set_noise,
 221                         .get = s5k4aa_get_noise
 222         },
 223 #define BRIGHTNESS_IDX 5
 224         {
 225                 {
 226                         .id             = V4L2_CID_BRIGHTNESS,
 227                         .type           = V4L2_CTRL_TYPE_INTEGER,
 228                         .name           = "Brightness",
 229                         .minimum        = 0,
 230                         .maximum        = 0x1f,
 231                         .step           = 1,
 232                         .default_value  = S5K4AA_DEFAULT_BRIGHTNESS,
 233                 },
 234                         .set = s5k4aa_set_brightness,
 235                         .get = s5k4aa_get_brightness
 236         },
 237
 238 };
 239
 240 static void s5k4aa_dump_registers(struct sd *sd);
 241
 242 int s5k4aa_probe(struct sd *sd)
 243 {
 244         u8 prod_id[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 245         const u8 expected_prod_id[6] = {0x00, 0x10, 0x00, 0x4b, 0x33, 0x75};
 246         int i, err = 0;
 247         s32 *sensor_settings;
 248
 249         if (force_sensor) {
 250                 if (force_sensor == S5K4AA_SENSOR) {
 251                         pr_info("Forcing a %s sensor\n", s5k4aa.name);
 252                         goto sensor_found;
 253                 }
 254                 /* If we want to force another sensor, don't try to probe this
 255                  * one */
 256                 return -ENODEV;
 257         }
 258
 259         PDEBUG(D_PROBE, "Probing for a s5k4aa sensor");
 260
 261         /* Preinit the sensor */
 262         for (i = 0; i < ARRAY_SIZE(preinit_s5k4aa) && !err; i++) {
 263                 u8 data[2] = {0x00, 0x00};
 264
 265                 switch (preinit_s5k4aa[i][0]) {
 266                 case BRIDGE:
 267                         err = m5602_write_bridge(sd,
 268                                                  preinit_s5k4aa[i][1],
 269                                                  preinit_s5k4aa[i][2]);
 270                         break;
 271
 272                 case SENSOR:
 273                         data[0] = preinit_s5k4aa[i][2];
 274                         err = m5602_write_sensor(sd,
 275                                                   preinit_s5k4aa[i][1],
 276                                                   data, 1);
 277                         break;
 278
 279                 case SENSOR_LONG:
 280                         data[0] = preinit_s5k4aa[i][2];
 281                         data[1] = preinit_s5k4aa[i][3];
 282                         err = m5602_write_sensor(sd,
 283                                                   preinit_s5k4aa[i][1],
 284                                                   data, 2);
 285                         break;
 286                 default:
 287                         pr_info("Invalid stream command, exiting init\n");
 288                         return -EINVAL;
 289                 }
 290         }
 291
 292         /* Test some registers, but we don't know their exact meaning yet */
 293         if (m5602_read_sensor(sd, 0x00, prod_id, 2))
 294                 return -ENODEV;
 295         if (m5602_read_sensor(sd, 0x02, prod_id+2, 2))
 296                 return -ENODEV;
 297         if (m5602_read_sensor(sd, 0x04, prod_id+4, 2))
 298                 return -ENODEV;
 299
 300         if (memcmp(prod_id, expected_prod_id, sizeof(prod_id)))
 301                 return -ENODEV;
 302         else
 303                 pr_info("Detected a s5k4aa sensor\n");
 304
 305 sensor_found:
 306         sensor_settings = kmalloc(
 307                 ARRAY_SIZE(s5k4aa_ctrls) * sizeof(s32), GFP_KERNEL);
 308         if (!sensor_settings)
 309                 return -ENOMEM;
 310
 311         sd->gspca_dev.cam.cam_mode = s5k4aa_modes;
 312         sd->gspca_dev.cam.nmodes = ARRAY_SIZE(s5k4aa_modes);
 313         sd->desc->ctrls = s5k4aa_ctrls;
 314         sd->desc->nctrls = ARRAY_SIZE(s5k4aa_ctrls);
 315
 316         for (i = 0; i < ARRAY_SIZE(s5k4aa_ctrls); i++)
 317                 sensor_settings[i] = s5k4aa_ctrls[i].qctrl.default_value;
 318         sd->sensor_priv = sensor_settings;
 319
 320         return 0;
 321 }
 322
 323 int s5k4aa_start(struct sd *sd)
 324 {
 325         int i, err = 0;
 326         u8 data[2];
 327         struct cam *cam = &sd->gspca_dev.cam;
 328         s32 *sensor_settings = sd->sensor_priv;
 329
 330         switch (cam->cam_mode[sd->gspca_dev.curr_mode].width) {
 331         case 1280:
 332                 PDEBUG(D_V4L2, "Configuring camera for SXGA mode");
 333
 334                 for (i = 0; i < ARRAY_SIZE(SXGA_s5k4aa); i++) {
 335                         switch (SXGA_s5k4aa[i][0]) {
 336                         case BRIDGE:
 337                                 err = m5602_write_bridge(sd,
 338                                                  SXGA_s5k4aa[i][1],
 339                                                  SXGA_s5k4aa[i][2]);
 340                         break;
 341
 342                         case SENSOR:
 343                                 data[0] = SXGA_s5k4aa[i][2];
 344                                 err = m5602_write_sensor(sd,
 345                                                  SXGA_s5k4aa[i][1],
 346                                                  data, 1);
 347                         break;
 348
 349                         case SENSOR_LONG:
 350                                 data[0] = SXGA_s5k4aa[i][2];
 351                                 data[1] = SXGA_s5k4aa[i][3];
 352                                 err = m5602_write_sensor(sd,
 353                                                   SXGA_s5k4aa[i][1],
 354                                                   data, 2);
 355                         break;
 356
 357                         default:
 358                                 pr_err("Invalid stream command, exiting init\n");
 359                                 return -EINVAL;
 360                         }
 361                 }
 362                 err = s5k4aa_set_noise(&sd->gspca_dev, 0);
 363                 if (err < 0)
 364                         return err;
 365                 break;
 366
 367         case 640:
 368                 PDEBUG(D_V4L2, "Configuring camera for VGA mode");
 369
 370                 for (i = 0; i < ARRAY_SIZE(VGA_s5k4aa); i++) {
 371                         switch (VGA_s5k4aa[i][0]) {
 372                         case BRIDGE:
 373                                 err = m5602_write_bridge(sd,
 374                                                  VGA_s5k4aa[i][1],
 375                                                  VGA_s5k4aa[i][2]);
 376                         break;
 377
 378                         case SENSOR:
 379                                 data[0] = VGA_s5k4aa[i][2];
 380                                 err = m5602_write_sensor(sd,
 381                                                  VGA_s5k4aa[i][1],
 382                                                  data, 1);
 383                         break;
 384
 385                         case SENSOR_LONG:
 386                                 data[0] = VGA_s5k4aa[i][2];
 387                                 data[1] = VGA_s5k4aa[i][3];
 388                                 err = m5602_write_sensor(sd,
 389                                                   VGA_s5k4aa[i][1],
 390                                                   data, 2);
 391                         break;
 392
 393                         default:
 394                                 pr_err("Invalid stream command, exiting init\n");
 395                                 return -EINVAL;
 396                         }
 397                 }
 398                 err = s5k4aa_set_noise(&sd->gspca_dev, 1);
 399                 if (err < 0)
 400                         return err;
 401                 break;
 402         }
 403         if (err < 0)
 404                 return err;
 405
 406         err = s5k4aa_set_exposure(&sd->gspca_dev,
 407                                    sensor_settings[EXPOSURE_IDX]);
 408         if (err < 0)
 409                 return err;
 410
 411         err = s5k4aa_set_gain(&sd->gspca_dev, sensor_settings[GAIN_IDX]);
 412         if (err < 0)
 413                 return err;
 414
 415         err = s5k4aa_set_brightness(&sd->gspca_dev,
 416                                      sensor_settings[BRIGHTNESS_IDX]);
 417         if (err < 0)
 418                 return err;
 419
 420         err = s5k4aa_set_noise(&sd->gspca_dev, sensor_settings[NOISE_SUPP_IDX]);
 421         if (err < 0)
 422                 return err;
 423
 424         err = s5k4aa_set_vflip(&sd->gspca_dev, sensor_settings[VFLIP_IDX]);
 425         if (err < 0)
 426                 return err;
 427
 428         return s5k4aa_set_hflip(&sd->gspca_dev, sensor_settings[HFLIP_IDX]);
 429 }
 430
 431 int s5k4aa_init(struct sd *sd)
 432 {
 433         int i, err = 0;
 434
 435         for (i = 0; i < ARRAY_SIZE(init_s5k4aa) && !err; i++) {
 436                 u8 data[2] = {0x00, 0x00};
 437
 438                 switch (init_s5k4aa[i][0]) {
 439                 case BRIDGE:
 440                         err = m5602_write_bridge(sd,
 441                                 init_s5k4aa[i][1],
 442                                 init_s5k4aa[i][2]);
 443                         break;
 444
 445                 case SENSOR:
 446                         data[0] = init_s5k4aa[i][2];
 447                         err = m5602_write_sensor(sd,
 448                                 init_s5k4aa[i][1], data, 1);
 449                         break;
 450
 451                 case SENSOR_LONG:
 452                         data[0] = init_s5k4aa[i][2];
 453                         data[1] = init_s5k4aa[i][3];
 454                         err = m5602_write_sensor(sd,
 455                                 init_s5k4aa[i][1], data, 2);
 456                         break;
 457                 default:
 458                         pr_info("Invalid stream command, exiting init\n");
 459                         return -EINVAL;
 460                 }
 461         }
 462
 463         if (dump_sensor)
 464                 s5k4aa_dump_registers(sd);
 465
 466         return err;
 467 }
 468
 469 static int s5k4aa_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
 470 {
 471         struct sd *sd = (struct sd *) gspca_dev;
 472         s32 *sensor_settings = sd->sensor_priv;
 473
 474         *val = sensor_settings[EXPOSURE_IDX];
 475         PDEBUG(D_V4L2, "Read exposure %d", *val);
 476
 477         return 0;
 478 }
 479
 480 static int s5k4aa_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
 481 {
 482         struct sd *sd = (struct sd *) gspca_dev;
 483         s32 *sensor_settings = sd->sensor_priv;
 484         u8 data = S5K4AA_PAGE_MAP_2;
 485         int err;
 486
 487         sensor_settings[EXPOSURE_IDX] = val;
 488         PDEBUG(D_V4L2, "Set exposure to %d", val);
 489         err = m5602_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
 490         if (err < 0)
 491                 return err;
 492         data = (val >> 8) & 0xff;
 493         err = m5602_write_sensor(sd, S5K4AA_EXPOSURE_HI, &data, 1);
 494         if (err < 0)
 495                 return err;
 496         data = val & 0xff;
 497         err = m5602_write_sensor(sd, S5K4AA_EXPOSURE_LO, &data, 1);
 498
 499         return err;
 500 }
 501
 502 static int s5k4aa_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
 503 {
 504         struct sd *sd = (struct sd *) gspca_dev;
 505         s32 *sensor_settings = sd->sensor_priv;
 506
 507         *val = sensor_settings[VFLIP_IDX];
 508         PDEBUG(D_V4L2, "Read vertical flip %d", *val);
 509
 510         return 0;
 511 }
 512
 513 static int s5k4aa_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
 514 {
 515         struct sd *sd = (struct sd *) gspca_dev;
 516         s32 *sensor_settings = sd->sensor_priv;
 517         u8 data = S5K4AA_PAGE_MAP_2;
 518         int err;
 519
 520         sensor_settings[VFLIP_IDX] = val;
 521
 522         PDEBUG(D_V4L2, "Set vertical flip to %d", val);
 523         err = m5602_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
 524         if (err < 0)
 525                 return err;
 526
 527         err = m5602_read_sensor(sd, S5K4AA_READ_MODE, &data, 1);
 528         if (err < 0)
 529                 return err;
 530
 531         if (dmi_check_system(s5k4aa_vflip_dmi_table))
 532                 val = !val;
 533
 534         data = ((data & ~S5K4AA_RM_V_FLIP) | ((val & 0x01) << 7));
 535         err = m5602_write_sensor(sd, S5K4AA_READ_MODE, &data, 1);
 536         if (err < 0)
 537                 return err;
 538
 539         err = m5602_read_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
 540         if (err < 0)
 541                 return err;
 542         if (val)
 543                 data &= 0xfe;
 544         else
 545                 data |= 0x01;
 546         err = m5602_write_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
 547         return err;
 548 }
 549
 550 static int s5k4aa_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
 551 {
 552         struct sd *sd = (struct sd *) gspca_dev;
 553         s32 *sensor_settings = sd->sensor_priv;
 554
 555         *val = sensor_settings[HFLIP_IDX];
 556         PDEBUG(D_V4L2, "Read horizontal flip %d", *val);
 557
 558         return 0;
 559 }
 560
 561 static int s5k4aa_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
 562 {
 563         struct sd *sd = (struct sd *) gspca_dev;
 564         s32 *sensor_settings = sd->sensor_priv;
 565         u8 data = S5K4AA_PAGE_MAP_2;
 566         int err;
 567
 568         sensor_settings[HFLIP_IDX] = val;
 569
 570         PDEBUG(D_V4L2, "Set horizontal flip to %d", val);
 571         err = m5602_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
 572         if (err < 0)
 573                 return err;
 574
 575         err = m5602_read_sensor(sd, S5K4AA_READ_MODE, &data, 1);
 576         if (err < 0)
 577                 return err;
 578
 579         if (dmi_check_system(s5k4aa_vflip_dmi_table))
 580                 val = !val;
 581
 582         data = ((data & ~S5K4AA_RM_H_FLIP) | ((val & 0x01) << 6));
 583         err = m5602_write_sensor(sd, S5K4AA_READ_MODE, &data, 1);
 584         if (err < 0)
 585                 return err;
 586
 587         err = m5602_read_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
 588         if (err < 0)
 589                 return err;
 590         if (val)
 591                 data &= 0xfe;
 592         else
 593                 data |= 0x01;
 594         err = m5602_write_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
 595         return err;
 596 }
 597
 598 static int s5k4aa_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
 599 {
 600         struct sd *sd = (struct sd *) gspca_dev;
 601         s32 *sensor_settings = sd->sensor_priv;
 602
 603         *val = sensor_settings[GAIN_IDX];
 604         PDEBUG(D_V4L2, "Read gain %d", *val);
 605         return 0;
 606 }
 607
 608 static int s5k4aa_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 609 {
 610         struct sd *sd = (struct sd *) gspca_dev;
 611         s32 *sensor_settings = sd->sensor_priv;
 612         u8 data = S5K4AA_PAGE_MAP_2;
 613         int err;
 614
 615         sensor_settings[GAIN_IDX] = val;
 616
 617         PDEBUG(D_V4L2, "Set gain to %d", val);
 618         err = m5602_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
 619         if (err < 0)
 620                 return err;
 621
 622         data = val & 0xff;
 623         err = m5602_write_sensor(sd, S5K4AA_GAIN, &data, 1);
 624
 625         return err;
 626 }
 627
 628 static int s5k4aa_get_brightness(struct gspca_dev *gspca_dev, __s32 *val)
 629 {
 630         struct sd *sd = (struct sd *) gspca_dev;
 631         s32 *sensor_settings = sd->sensor_priv;
 632
 633         *val = sensor_settings[BRIGHTNESS_IDX];
 634         PDEBUG(D_V4L2, "Read brightness %d", *val);
 635         return 0;
 636 }
 637
 638 static int s5k4aa_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
 639 {
 640         struct sd *sd = (struct sd *) gspca_dev;
 641         s32 *sensor_settings = sd->sensor_priv;
 642         u8 data = S5K4AA_PAGE_MAP_2;
 643         int err;
 644
 645         sensor_settings[BRIGHTNESS_IDX] = val;
 646
 647         PDEBUG(D_V4L2, "Set brightness to %d", val);
 648         err = m5602_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
 649         if (err < 0)
 650                 return err;
 651
 652         data = val & 0xff;
 653         return m5602_write_sensor(sd, S5K4AA_BRIGHTNESS, &data, 1);
 654 }
 655
 656 static int s5k4aa_get_noise(struct gspca_dev *gspca_dev, __s32 *val)
 657 {
 658         struct sd *sd = (struct sd *) gspca_dev;
 659         s32 *sensor_settings = sd->sensor_priv;
 660
 661         *val = sensor_settings[NOISE_SUPP_IDX];
 662         PDEBUG(D_V4L2, "Read noise %d", *val);
 663         return 0;
 664 }
 665
 666 static int s5k4aa_set_noise(struct gspca_dev *gspca_dev, __s32 val)
 667 {
 668         struct sd *sd = (struct sd *) gspca_dev;
 669         s32 *sensor_settings = sd->sensor_priv;
 670         u8 data = S5K4AA_PAGE_MAP_2;
 671         int err;
 672
 673         sensor_settings[NOISE_SUPP_IDX] = val;
 674
 675         PDEBUG(D_V4L2, "Set noise to %d", val);
 676         err = m5602_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
 677         if (err < 0)
 678                 return err;
 679
 680         data = val & 0x01;
 681         return m5602_write_sensor(sd, S5K4AA_NOISE_SUPP, &data, 1);
 682 }
 683
 684 void s5k4aa_disconnect(struct sd *sd)
 685 {
 686         sd->sensor = NULL;
 687         kfree(sd->sensor_priv);
 688 }
 689
 690 static void s5k4aa_dump_registers(struct sd *sd)
 691 {
 692         int address;
 693         u8 page, old_page;
 694         m5602_read_sensor(sd, S5K4AA_PAGE_MAP, &old_page, 1);
 695         for (page = 0; page < 16; page++) {
 696                 m5602_write_sensor(sd, S5K4AA_PAGE_MAP, &page, 1);
 697                 pr_info("Dumping the s5k4aa register state for page 0x%x\n",
 698                         page);
 699                 for (address = 0; address <= 0xff; address++) {
 700                         u8 value = 0;
 701                         m5602_read_sensor(sd, address, &value, 1);
 702                         pr_info("register 0x%x contains 0x%x\n",
 703                                 address, value);
 704                 }
 705         }
 706         pr_info("s5k4aa register state dump complete\n");
 707
 708         for (page = 0; page < 16; page++) {
 709                 m5602_write_sensor(sd, S5K4AA_PAGE_MAP, &page, 1);
 710                 pr_info("Probing for which registers that are read/write for page 0x%x\n",
 711                         page);
 712                 for (address = 0; address <= 0xff; address++) {
 713                         u8 old_value, ctrl_value, test_value = 0xff;
 714
 715                         m5602_read_sensor(sd, address, &old_value, 1);
 716                         m5602_write_sensor(sd, address, &test_value, 1);
 717                         m5602_read_sensor(sd, address, &ctrl_value, 1);
 718
 719                         if (ctrl_value == test_value)
 720                                 pr_info("register 0x%x is writeable\n",
 721                                         address);
 722                         else
 723                                 pr_info("register 0x%x is read only\n",
 724                                         address);
 725
 726                         /* Restore original value */
 727                         m5602_write_sensor(sd, address, &old_value, 1);
 728                 }
 729         }
 730         pr_info("Read/write register probing complete\n");
 731         m5602_write_sensor(sd, S5K4AA_PAGE_MAP, &old_page, 1);
 732 }