drivers/media/video/gspca/stv06xx/stv06xx_hdcs.c

   1 /*
   2  * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
   3  *                    Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
   4  * Copyright (c) 2002, 2003 Tuukka Toivonen
   5  * Copyright (c) 2008 Erik Andrén
   6  * Copyright (c) 2008 Chia-I Wu
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  * P/N 861037:      Sensor HDCS1000        ASIC STV0600
  23  * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
  24  * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
  25  * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
  26  * P/N 861075-0040: Sensor HDCS1000        ASIC
  27  * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
  28  * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
  29  */
  30
  31 #include "stv06xx_hdcs.h"
  32
  33 static const struct ctrl hdcs1x00_ctrl[] = {
  34         {
  35                 {
  36                         .id             = V4L2_CID_EXPOSURE,
  37                         .type           = V4L2_CTRL_TYPE_INTEGER,
  38                         .name           = "exposure",
  39                         .minimum        = 0x00,
  40                         .maximum        = 0xff,
  41                         .step           = 0x1,
  42                         .default_value  = HDCS_DEFAULT_EXPOSURE,
  43                         .flags          = V4L2_CTRL_FLAG_SLIDER
  44                 },
  45                 .set = hdcs_set_exposure,
  46                 .get = hdcs_get_exposure
  47         }, {
  48                 {
  49                         .id             = V4L2_CID_GAIN,
  50                         .type           = V4L2_CTRL_TYPE_INTEGER,
  51                         .name           = "gain",
  52                         .minimum        = 0x00,
  53                         .maximum        = 0xff,
  54                         .step           = 0x1,
  55                         .default_value  = HDCS_DEFAULT_GAIN,
  56                         .flags          = V4L2_CTRL_FLAG_SLIDER
  57                 },
  58                 .set = hdcs_set_gain,
  59                 .get = hdcs_get_gain
  60         }
  61 };
  62
  63 static struct v4l2_pix_format hdcs1x00_mode[] = {
  64         {
  65                 HDCS_1X00_DEF_WIDTH,
  66                 HDCS_1X00_DEF_HEIGHT,
  67                 V4L2_PIX_FMT_SGRBG8,
  68                 V4L2_FIELD_NONE,
  69                 .sizeimage =
  70                         HDCS_1X00_DEF_WIDTH * HDCS_1X00_DEF_HEIGHT,
  71                 .bytesperline = HDCS_1X00_DEF_WIDTH,
  72                 .colorspace = V4L2_COLORSPACE_SRGB,
  73                 .priv = 1
  74         }
  75 };
  76
  77 static const struct ctrl hdcs1020_ctrl[] = {
  78         {
  79                 {
  80                         .id             = V4L2_CID_EXPOSURE,
  81                         .type           = V4L2_CTRL_TYPE_INTEGER,
  82                         .name           = "exposure",
  83                         .minimum        = 0x00,
  84                         .maximum        = 0xffff,
  85                         .step           = 0x1,
  86                         .default_value  = HDCS_DEFAULT_EXPOSURE,
  87                         .flags          = V4L2_CTRL_FLAG_SLIDER
  88                 },
  89                 .set = hdcs_set_exposure,
  90                 .get = hdcs_get_exposure
  91         }, {
  92                 {
  93                         .id             = V4L2_CID_GAIN,
  94                         .type           = V4L2_CTRL_TYPE_INTEGER,
  95                         .name           = "gain",
  96                         .minimum        = 0x00,
  97                         .maximum        = 0xff,
  98                         .step           = 0x1,
  99                         .default_value  = HDCS_DEFAULT_GAIN,
 100                         .flags          = V4L2_CTRL_FLAG_SLIDER
 101                 },
 102                 .set = hdcs_set_gain,
 103                 .get = hdcs_get_gain
 104         }
 105 };
 106
 107 static struct v4l2_pix_format hdcs1020_mode[] = {
 108         {
 109                 HDCS_1020_DEF_WIDTH,
 110                 HDCS_1020_DEF_HEIGHT,
 111                 V4L2_PIX_FMT_SGRBG8,
 112                 V4L2_FIELD_NONE,
 113                 .sizeimage =
 114                         HDCS_1020_DEF_WIDTH * HDCS_1020_DEF_HEIGHT,
 115                 .bytesperline = HDCS_1020_DEF_WIDTH,
 116                 .colorspace = V4L2_COLORSPACE_SRGB,
 117                 .priv = 1
 118         }
 119 };
 120
 121 enum hdcs_power_state {
 122         HDCS_STATE_SLEEP,
 123         HDCS_STATE_IDLE,
 124         HDCS_STATE_RUN
 125 };
 126
 127 /* no lock? */
 128 struct hdcs {
 129         enum hdcs_power_state state;
 130         int w, h;
 131
 132         /* visible area of the sensor array */
 133         struct {
 134                 int left, top;
 135                 int width, height;
 136                 int border;
 137         } array;
 138
 139         struct {
 140                 /* Column timing overhead */
 141                 u8 cto;
 142                 /* Column processing overhead */
 143                 u8 cpo;
 144                 /* Row sample period constant */
 145                 u16 rs;
 146                 /* Exposure reset duration */
 147                 u16 er;
 148         } exp;
 149
 150         int psmp;
 151         u8 exp_cache, gain_cache;
 152 };
 153
 154 static int hdcs_reg_write_seq(struct sd *sd, u8 reg, u8 *vals, u8 len)
 155 {
 156         u8 regs[I2C_MAX_BYTES * 2];
 157         int i;
 158
 159         if (unlikely((len <= 0) || (len >= I2C_MAX_BYTES) ||
 160                      (reg + len > 0xff)))
 161                 return -EINVAL;
 162
 163         for (i = 0; i < len; i++) {
 164                 regs[2 * i] = reg;
 165                 regs[2 * i + 1] = vals[i];
 166                 /* All addresses are shifted left one bit as bit 0 toggles r/w */
 167                 reg += 2;
 168         }
 169
 170         return stv06xx_write_sensor_bytes(sd, regs, len);
 171 }
 172
 173 static int hdcs_set_state(struct sd *sd, enum hdcs_power_state state)
 174 {
 175         struct hdcs *hdcs = sd->sensor_priv;
 176         u8 val;
 177         int ret;
 178
 179         if (hdcs->state == state)
 180                 return 0;
 181
 182         /* we need to go idle before running or sleeping */
 183         if (hdcs->state != HDCS_STATE_IDLE) {
 184                 ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
 185                 if (ret)
 186                         return ret;
 187         }
 188
 189         hdcs->state = HDCS_STATE_IDLE;
 190
 191         if (state == HDCS_STATE_IDLE)
 192                 return 0;
 193
 194         switch (state) {
 195         case HDCS_STATE_SLEEP:
 196                 val = HDCS_SLEEP_MODE;
 197                 break;
 198
 199         case HDCS_STATE_RUN:
 200                 val = HDCS_RUN_ENABLE;
 201                 break;
 202
 203         default:
 204                 return -EINVAL;
 205         }
 206
 207         ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), val);
 208
 209         /* Update the state if the write succeeded */
 210         if (!ret)
 211                 hdcs->state = state;
 212
 213         return ret;
 214 }
 215
 216 static int hdcs_reset(struct sd *sd)
 217 {
 218         struct hdcs *hdcs = sd->sensor_priv;
 219         int err;
 220
 221         err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 1);
 222         if (err < 0)
 223                 return err;
 224
 225         err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
 226         if (err < 0)
 227                 hdcs->state = HDCS_STATE_IDLE;
 228
 229         return err;
 230 }
 231
 232 static int hdcs_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
 233 {
 234         struct sd *sd = (struct sd *) gspca_dev;
 235         struct hdcs *hdcs = sd->sensor_priv;
 236
 237         *val = hdcs->exp_cache;
 238
 239         return 0;
 240 }
 241
 242 static int hdcs_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
 243 {
 244         struct sd *sd = (struct sd *) gspca_dev;
 245         struct hdcs *hdcs = sd->sensor_priv;
 246         int rowexp, srowexp;
 247         int max_srowexp;
 248         /* Column time period */
 249         int ct;
 250         /* Column processing period */
 251         int cp;
 252         /* Row processing period */
 253         int rp;
 254         /* Minimum number of column timing periods
 255            within the column processing period */
 256         int mnct;
 257         int cycles, err;
 258         u8 exp[14];
 259
 260         val &= 0xff;
 261         hdcs->exp_cache = val;
 262
 263         cycles = val * HDCS_CLK_FREQ_MHZ * 257;
 264
 265         ct = hdcs->exp.cto + hdcs->psmp + (HDCS_ADC_START_SIG_DUR + 2);
 266         cp = hdcs->exp.cto + (hdcs->w * ct / 2);
 267
 268         /* the cycles one row takes */
 269         rp = hdcs->exp.rs + cp;
 270
 271         rowexp = cycles / rp;
 272
 273         /* the remaining cycles */
 274         cycles -= rowexp * rp;
 275
 276         /* calculate sub-row exposure */
 277         if (IS_1020(sd)) {
 278                 /* see HDCS-1020 datasheet 3.5.6.4, p. 63 */
 279                 srowexp = hdcs->w - (cycles + hdcs->exp.er + 13) / ct;
 280
 281                 mnct = (hdcs->exp.er + 12 + ct - 1) / ct;
 282                 max_srowexp = hdcs->w - mnct;
 283         } else {
 284                 /* see HDCS-1000 datasheet 3.4.5.5, p. 61 */
 285                 srowexp = cp - hdcs->exp.er - 6 - cycles;
 286
 287                 mnct = (hdcs->exp.er + 5 + ct - 1) / ct;
 288                 max_srowexp = cp - mnct * ct - 1;
 289         }
 290
 291         if (srowexp < 0)
 292                 srowexp = 0;
 293         else if (srowexp > max_srowexp)
 294                 srowexp = max_srowexp;
 295
 296         if (IS_1020(sd)) {
 297                 exp[0] = HDCS20_CONTROL;
 298                 exp[1] = 0x00;          /* Stop streaming */
 299                 exp[2] = HDCS_ROWEXPL;
 300                 exp[3] = rowexp & 0xff;
 301                 exp[4] = HDCS_ROWEXPH;
 302                 exp[5] = rowexp >> 8;
 303                 exp[6] = HDCS20_SROWEXP;
 304                 exp[7] = (srowexp >> 2) & 0xff;
 305                 exp[8] = HDCS20_ERROR;
 306                 exp[9] = 0x10;          /* Clear exposure error flag*/
 307                 exp[10] = HDCS20_CONTROL;
 308                 exp[11] = 0x04;         /* Restart streaming */
 309                 err = stv06xx_write_sensor_bytes(sd, exp, 6);
 310         } else {
 311                 exp[0] = HDCS00_CONTROL;
 312                 exp[1] = 0x00;         /* Stop streaming */
 313                 exp[2] = HDCS_ROWEXPL;
 314                 exp[3] = rowexp & 0xff;
 315                 exp[4] = HDCS_ROWEXPH;
 316                 exp[5] = rowexp >> 8;
 317                 exp[6] = HDCS00_SROWEXPL;
 318                 exp[7] = srowexp & 0xff;
 319                 exp[8] = HDCS00_SROWEXPH;
 320                 exp[9] = srowexp >> 8;
 321                 exp[10] = HDCS_STATUS;
 322                 exp[11] = 0x10;         /* Clear exposure error flag*/
 323                 exp[12] = HDCS00_CONTROL;
 324                 exp[13] = 0x04;         /* Restart streaming */
 325                 err = stv06xx_write_sensor_bytes(sd, exp, 7);
 326                 if (err < 0)
 327                         return err;
 328         }
 329         PDEBUG(D_V4L2, "Writing exposure %d, rowexp %d, srowexp %d",
 330                val, rowexp, srowexp);
 331         return err;
 332 }
 333
 334 static int hdcs_set_gains(struct sd *sd, u8 g)
 335 {
 336         struct hdcs *hdcs = sd->sensor_priv;
 337         int err;
 338         u8 gains[4];
 339
 340         hdcs->gain_cache = g;
 341
 342         /* the voltage gain Av = (1 + 19 * val / 127) * (1 + bit7) */
 343         if (g > 127)
 344                 g = 0x80 | (g / 2);
 345
 346         gains[0] = g;
 347         gains[1] = g;
 348         gains[2] = g;
 349         gains[3] = g;
 350
 351         err = hdcs_reg_write_seq(sd, HDCS_ERECPGA, gains, 4);
 352                 return err;
 353 }
 354
 355 static int hdcs_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
 356 {
 357         struct sd *sd = (struct sd *) gspca_dev;
 358         struct hdcs *hdcs = sd->sensor_priv;
 359
 360         *val = hdcs->gain_cache;
 361
 362         return 0;
 363 }
 364
 365 static int hdcs_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 366 {
 367         PDEBUG(D_V4L2, "Writing gain %d", val);
 368         return hdcs_set_gains((struct sd *) gspca_dev,
 369                                val & 0xff);
 370 }
 371
 372 static int hdcs_set_size(struct sd *sd,
 373                 unsigned int width, unsigned int height)
 374 {
 375         struct hdcs *hdcs = sd->sensor_priv;
 376         u8 win[4];
 377         unsigned int x, y;
 378         int err;
 379
 380         /* must be multiple of 4 */
 381         width = (width + 3) & ~0x3;
 382         height = (height + 3) & ~0x3;
 383
 384         if (width > hdcs->array.width)
 385                 width = hdcs->array.width;
 386
 387         if (IS_1020(sd)) {
 388                 /* the borders are also invalid */
 389                 if (height + 2 * hdcs->array.border + HDCS_1020_BOTTOM_Y_SKIP
 390                                   > hdcs->array.height)
 391                         height = hdcs->array.height - 2 * hdcs->array.border -
 392                                 HDCS_1020_BOTTOM_Y_SKIP;
 393
 394                 y = (hdcs->array.height - HDCS_1020_BOTTOM_Y_SKIP - height) / 2
 395                                 + hdcs->array.top;
 396         } else {
 397                 if (height > hdcs->array.height)
 398                         height = hdcs->array.height;
 399
 400                 y = hdcs->array.top + (hdcs->array.height - height) / 2;
 401         }
 402
 403         x = hdcs->array.left + (hdcs->array.width - width) / 2;
 404
 405         win[0] = y / 4;
 406         win[1] = x / 4;
 407         win[2] = (y + height) / 4 - 1;
 408         win[3] = (x + width) / 4 - 1;
 409
 410         err = hdcs_reg_write_seq(sd, HDCS_FWROW, win, 4);
 411         if (err < 0)
 412                 return err;
 413
 414         /* Update the current width and height */
 415         hdcs->w = width;
 416         hdcs->h = height;
 417         return err;
 418 }
 419
 420 static int hdcs_probe_1x00(struct sd *sd)
 421 {
 422         struct hdcs *hdcs;
 423         u16 sensor;
 424         int ret;
 425
 426         ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
 427         if (ret < 0 || sensor != 0x08)
 428                 return -ENODEV;
 429
 430         info("HDCS-1000/1100 sensor detected");
 431
 432         sd->gspca_dev.cam.cam_mode = hdcs1x00_mode;
 433         sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1x00_mode);
 434         sd->desc.ctrls = hdcs1x00_ctrl;
 435         sd->desc.nctrls = ARRAY_SIZE(hdcs1x00_ctrl);
 436
 437         hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
 438         if (!hdcs)
 439                 return -ENOMEM;
 440
 441         hdcs->array.left = 8;
 442         hdcs->array.top = 8;
 443         hdcs->array.width = HDCS_1X00_DEF_WIDTH;
 444         hdcs->array.height = HDCS_1X00_DEF_HEIGHT;
 445         hdcs->array.border = 4;
 446
 447         hdcs->exp.cto = 4;
 448         hdcs->exp.cpo = 2;
 449         hdcs->exp.rs = 186;
 450         hdcs->exp.er = 100;
 451
 452         /*
 453          * Frame rate on HDCS-1000 with STV600 depends on PSMP:
 454          *  4 = doesn't work at all
 455          *  5 = 7.8 fps,
 456          *  6 = 6.9 fps,
 457          *  8 = 6.3 fps,
 458          * 10 = 5.5 fps,
 459          * 15 = 4.4 fps,
 460          * 31 = 2.8 fps
 461          *
 462          * Frame rate on HDCS-1000 with STV602 depends on PSMP:
 463          * 15 = doesn't work at all
 464          * 18 = doesn't work at all
 465          * 19 = 7.3 fps
 466          * 20 = 7.4 fps
 467          * 21 = 7.4 fps
 468          * 22 = 7.4 fps
 469          * 24 = 6.3 fps
 470          * 30 = 5.4 fps
 471          */
 472         hdcs->psmp = (sd->bridge == BRIDGE_STV602) ? 20 : 5;
 473
 474         sd->sensor_priv = hdcs;
 475
 476         return 0;
 477 }
 478
 479 static int hdcs_probe_1020(struct sd *sd)
 480 {
 481         struct hdcs *hdcs;
 482         u16 sensor;
 483         int ret;
 484
 485         ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
 486         if (ret < 0 || sensor != 0x10)
 487                 return -ENODEV;
 488
 489         info("HDCS-1020 sensor detected");
 490
 491         sd->gspca_dev.cam.cam_mode = hdcs1020_mode;
 492         sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1020_mode);
 493         sd->desc.ctrls = hdcs1020_ctrl;
 494         sd->desc.nctrls = ARRAY_SIZE(hdcs1020_ctrl);
 495
 496         hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
 497         if (!hdcs)
 498                 return -ENOMEM;
 499
 500         /*
 501          * From Andrey's test image: looks like HDCS-1020 upper-left
 502          * visible pixel is at 24,8 (y maybe even smaller?) and lower-right
 503          * visible pixel at 375,299 (x maybe even larger?)
 504          */
 505         hdcs->array.left = 24;
 506         hdcs->array.top  = 4;
 507         hdcs->array.width = HDCS_1020_DEF_WIDTH;
 508         hdcs->array.height = 304;
 509         hdcs->array.border = 4;
 510
 511         hdcs->psmp = 6;
 512
 513         hdcs->exp.cto = 3;
 514         hdcs->exp.cpo = 3;
 515         hdcs->exp.rs = 155;
 516         hdcs->exp.er = 96;
 517
 518         sd->sensor_priv = hdcs;
 519
 520         return 0;
 521 }
 522
 523 static int hdcs_start(struct sd *sd)
 524 {
 525         PDEBUG(D_STREAM, "Starting stream");
 526
 527         return hdcs_set_state(sd, HDCS_STATE_RUN);
 528 }
 529
 530 static int hdcs_stop(struct sd *sd)
 531 {
 532         PDEBUG(D_STREAM, "Halting stream");
 533
 534         return hdcs_set_state(sd, HDCS_STATE_SLEEP);
 535 }
 536
 537 static void hdcs_disconnect(struct sd *sd)
 538 {
 539         PDEBUG(D_PROBE, "Disconnecting the sensor");
 540         kfree(sd->sensor_priv);
 541 }
 542
 543 static int hdcs_init(struct sd *sd)
 544 {
 545         struct hdcs *hdcs = sd->sensor_priv;
 546         int i, err = 0;
 547
 548         /* Set the STV0602AA in STV0600 emulation mode */
 549         if (sd->bridge == BRIDGE_STV602)
 550                 stv06xx_write_bridge(sd, STV_STV0600_EMULATION, 1);
 551
 552         /* Execute the bridge init */
 553         for (i = 0; i < ARRAY_SIZE(stv_bridge_init) && !err; i++) {
 554                 err = stv06xx_write_bridge(sd, stv_bridge_init[i][0],
 555                                            stv_bridge_init[i][1]);
 556         }
 557         if (err < 0)
 558                 return err;
 559
 560         /* sensor soft reset */
 561         hdcs_reset(sd);
 562
 563         /* Execute the sensor init */
 564         for (i = 0; i < ARRAY_SIZE(stv_sensor_init) && !err; i++) {
 565                 err = stv06xx_write_sensor(sd, stv_sensor_init[i][0],
 566                                              stv_sensor_init[i][1]);
 567         }
 568         if (err < 0)
 569                 return err;
 570
 571         /* Enable continous frame capture, bit 2: stop when frame complete */
 572         err = stv06xx_write_sensor(sd, HDCS_REG_CONFIG(sd), BIT(3));
 573         if (err < 0)
 574                 return err;
 575
 576         /* Set PGA sample duration
 577         (was 0x7E for the STV602, but caused slow framerate with HDCS-1020) */
 578         if (IS_1020(sd))
 579                 err = stv06xx_write_sensor(sd, HDCS_TCTRL,
 580                                 (HDCS_ADC_START_SIG_DUR << 6) | hdcs->psmp);
 581         else
 582                 err = stv06xx_write_sensor(sd, HDCS_TCTRL,
 583                                 (HDCS_ADC_START_SIG_DUR << 5) | hdcs->psmp);
 584         if (err < 0)
 585                 return err;
 586
 587         err = hdcs_set_gains(sd, HDCS_DEFAULT_GAIN);
 588         if (err < 0)
 589                 return err;
 590
 591         err = hdcs_set_size(sd, hdcs->array.width, hdcs->array.height);
 592         if (err < 0)
 593                 return err;
 594
 595         err = hdcs_set_exposure(&sd->gspca_dev, HDCS_DEFAULT_EXPOSURE);
 596         return err;
 597 }
 598
 599 static int hdcs_dump(struct sd *sd)
 600 {
 601         u16 reg, val;
 602
 603         info("Dumping sensor registers:");
 604
 605         for (reg = HDCS_IDENT; reg <= HDCS_ROWEXPH; reg++) {
 606                 stv06xx_read_sensor(sd, reg, &val);
 607                 info("reg 0x%02x = 0x%02x", reg, val);
 608         }
 609         return 0;
 610 }