drivers/media/video/gspca/m5602/m5602_s5k83a.c

   1 /*
   2  * Driver for the s5k83a 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 #include <linux/kthread.h>
  20 #include "m5602_s5k83a.h"
  21
  22 static int s5k83a_set_gain(struct gspca_dev *gspca_dev, __s32 val);
  23 static int s5k83a_get_gain(struct gspca_dev *gspca_dev, __s32 *val);
  24 static int s5k83a_set_brightness(struct gspca_dev *gspca_dev, __s32 val);
  25 static int s5k83a_get_brightness(struct gspca_dev *gspca_dev, __s32 *val);
  26 static int s5k83a_set_exposure(struct gspca_dev *gspca_dev, __s32 val);
  27 static int s5k83a_get_exposure(struct gspca_dev *gspca_dev, __s32 *val);
  28 static int s5k83a_get_vflip(struct gspca_dev *gspca_dev, __s32 *val);
  29 static int s5k83a_set_vflip(struct gspca_dev *gspca_dev, __s32 val);
  30 static int s5k83a_get_hflip(struct gspca_dev *gspca_dev, __s32 *val);
  31 static int s5k83a_set_hflip(struct gspca_dev *gspca_dev, __s32 val);
  32
  33 static struct v4l2_pix_format s5k83a_modes[] = {
  34         {
  35                 640,
  36                 480,
  37                 V4L2_PIX_FMT_SBGGR8,
  38                 V4L2_FIELD_NONE,
  39                 .sizeimage =
  40                         640 * 480,
  41                 .bytesperline = 640,
  42                 .colorspace = V4L2_COLORSPACE_SRGB,
  43                 .priv = 0
  44         }
  45 };
  46
  47 static const struct ctrl s5k83a_ctrls[] = {
  48 #define GAIN_IDX 0
  49         {
  50                 {
  51                         .id = V4L2_CID_GAIN,
  52                         .type = V4L2_CTRL_TYPE_INTEGER,
  53                         .name = "gain",
  54                         .minimum = 0x00,
  55                         .maximum = 0xff,
  56                         .step = 0x01,
  57                         .default_value = S5K83A_DEFAULT_GAIN,
  58                         .flags = V4L2_CTRL_FLAG_SLIDER
  59                 },
  60                         .set = s5k83a_set_gain,
  61                         .get = s5k83a_get_gain
  62
  63         },
  64 #define BRIGHTNESS_IDX 1
  65         {
  66                 {
  67                         .id = V4L2_CID_BRIGHTNESS,
  68                         .type = V4L2_CTRL_TYPE_INTEGER,
  69                         .name = "brightness",
  70                         .minimum = 0x00,
  71                         .maximum = 0xff,
  72                         .step = 0x01,
  73                         .default_value = S5K83A_DEFAULT_BRIGHTNESS,
  74                         .flags = V4L2_CTRL_FLAG_SLIDER
  75                 },
  76                         .set = s5k83a_set_brightness,
  77                         .get = s5k83a_get_brightness,
  78         },
  79 #define EXPOSURE_IDX 2
  80         {
  81                 {
  82                         .id = V4L2_CID_EXPOSURE,
  83                         .type = V4L2_CTRL_TYPE_INTEGER,
  84                         .name = "exposure",
  85                         .minimum = 0x00,
  86                         .maximum = S5K83A_MAXIMUM_EXPOSURE,
  87                         .step = 0x01,
  88                         .default_value = S5K83A_DEFAULT_EXPOSURE,
  89                         .flags = V4L2_CTRL_FLAG_SLIDER
  90                 },
  91                         .set = s5k83a_set_exposure,
  92                         .get = s5k83a_get_exposure
  93         },
  94 #define HFLIP_IDX 3
  95         {
  96                 {
  97                         .id = V4L2_CID_HFLIP,
  98                         .type = V4L2_CTRL_TYPE_BOOLEAN,
  99                         .name = "horizontal flip",
 100                         .minimum = 0,
 101                         .maximum = 1,
 102                         .step = 1,
 103                         .default_value = 0
 104                 },
 105                         .set = s5k83a_set_hflip,
 106                         .get = s5k83a_get_hflip
 107         },
 108 #define VFLIP_IDX 4
 109         {
 110                 {
 111                         .id = V4L2_CID_VFLIP,
 112                         .type = V4L2_CTRL_TYPE_BOOLEAN,
 113                         .name = "vertical flip",
 114                         .minimum = 0,
 115                         .maximum = 1,
 116                         .step = 1,
 117                         .default_value = 0
 118                 },
 119                 .set = s5k83a_set_vflip,
 120                 .get = s5k83a_get_vflip
 121         }
 122 };
 123
 124 static void s5k83a_dump_registers(struct sd *sd);
 125 static int s5k83a_get_rotation(struct sd *sd, u8 *reg_data);
 126 static int s5k83a_set_led_indication(struct sd *sd, u8 val);
 127 static int s5k83a_set_flip_real(struct gspca_dev *gspca_dev,
 128                                 __s32 vflip, __s32 hflip);
 129
 130 int s5k83a_probe(struct sd *sd)
 131 {
 132         struct s5k83a_priv *sens_priv;
 133         u8 prod_id = 0, ver_id = 0;
 134         int i, err = 0;
 135
 136         if (force_sensor) {
 137                 if (force_sensor == S5K83A_SENSOR) {
 138                         info("Forcing a %s sensor", s5k83a.name);
 139                         goto sensor_found;
 140                 }
 141                 /* If we want to force another sensor, don't try to probe this
 142                  * one */
 143                 return -ENODEV;
 144         }
 145
 146         PDEBUG(D_PROBE, "Probing for a s5k83a sensor");
 147
 148         /* Preinit the sensor */
 149         for (i = 0; i < ARRAY_SIZE(preinit_s5k83a) && !err; i++) {
 150                 u8 data[2] = {preinit_s5k83a[i][2], preinit_s5k83a[i][3]};
 151                 if (preinit_s5k83a[i][0] == SENSOR)
 152                         err = m5602_write_sensor(sd, preinit_s5k83a[i][1],
 153                                 data, 2);
 154                 else
 155                         err = m5602_write_bridge(sd, preinit_s5k83a[i][1],
 156                                 data[0]);
 157         }
 158
 159         /* We don't know what register (if any) that contain the product id
 160          * Just pick the first addresses that seem to produce the same results
 161          * on multiple machines */
 162         if (m5602_read_sensor(sd, 0x00, &prod_id, 1))
 163                 return -ENODEV;
 164
 165         if (m5602_read_sensor(sd, 0x01, &ver_id, 1))
 166                 return -ENODEV;
 167
 168         if ((prod_id == 0xff) || (ver_id == 0xff))
 169                 return -ENODEV;
 170         else
 171                 info("Detected a s5k83a sensor");
 172
 173 sensor_found:
 174         sens_priv = kmalloc(
 175                 sizeof(struct s5k83a_priv), GFP_KERNEL);
 176         if (!sens_priv)
 177                 return -ENOMEM;
 178
 179         sens_priv->settings =
 180         kmalloc(sizeof(s32)*ARRAY_SIZE(s5k83a_ctrls), GFP_KERNEL);
 181         if (!sens_priv->settings) {
 182                 kfree(sens_priv);
 183                 return -ENOMEM;
 184         }
 185
 186         sd->gspca_dev.cam.cam_mode = s5k83a_modes;
 187         sd->gspca_dev.cam.nmodes = ARRAY_SIZE(s5k83a_modes);
 188         sd->desc->ctrls = s5k83a_ctrls;
 189         sd->desc->nctrls = ARRAY_SIZE(s5k83a_ctrls);
 190
 191         /* null the pointer! thread is't running now */
 192         sens_priv->rotation_thread = NULL;
 193
 194         for (i = 0; i < ARRAY_SIZE(s5k83a_ctrls); i++)
 195                 sens_priv->settings[i] = s5k83a_ctrls[i].qctrl.default_value;
 196
 197         sd->sensor_priv = sens_priv;
 198         return 0;
 199 }
 200
 201 int s5k83a_init(struct sd *sd)
 202 {
 203         int i, err = 0;
 204         s32 *sensor_settings =
 205                         ((struct s5k83a_priv *) sd->sensor_priv)->settings;
 206
 207         for (i = 0; i < ARRAY_SIZE(init_s5k83a) && !err; i++) {
 208                 u8 data[2] = {0x00, 0x00};
 209
 210                 switch (init_s5k83a[i][0]) {
 211                 case BRIDGE:
 212                         err = m5602_write_bridge(sd,
 213                                         init_s5k83a[i][1],
 214                                         init_s5k83a[i][2]);
 215                         break;
 216
 217                 case SENSOR:
 218                         data[0] = init_s5k83a[i][2];
 219                         err = m5602_write_sensor(sd,
 220                                 init_s5k83a[i][1], data, 1);
 221                         break;
 222
 223                 case SENSOR_LONG:
 224                         data[0] = init_s5k83a[i][2];
 225                         data[1] = init_s5k83a[i][3];
 226                         err = m5602_write_sensor(sd,
 227                                 init_s5k83a[i][1], data, 2);
 228                         break;
 229                 default:
 230                         info("Invalid stream command, exiting init");
 231                         return -EINVAL;
 232                 }
 233         }
 234
 235         if (dump_sensor)
 236                 s5k83a_dump_registers(sd);
 237
 238         err = s5k83a_set_gain(&sd->gspca_dev, sensor_settings[GAIN_IDX]);
 239         if (err < 0)
 240                 return err;
 241
 242         err = s5k83a_set_brightness(&sd->gspca_dev,
 243                                      sensor_settings[BRIGHTNESS_IDX]);
 244         if (err < 0)
 245                 return err;
 246
 247         err = s5k83a_set_exposure(&sd->gspca_dev,
 248                                    sensor_settings[EXPOSURE_IDX]);
 249         if (err < 0)
 250                 return err;
 251
 252         err = s5k83a_set_hflip(&sd->gspca_dev, sensor_settings[HFLIP_IDX]);
 253         if (err < 0)
 254                 return err;
 255
 256         err = s5k83a_set_vflip(&sd->gspca_dev, sensor_settings[VFLIP_IDX]);
 257
 258         return err;
 259 }
 260
 261 static int rotation_thread_function(void *data)
 262 {
 263         struct sd *sd = (struct sd *) data;
 264         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 265         u8 reg, previous_rotation = 0;
 266         __s32 vflip, hflip;
 267
 268         set_current_state(TASK_INTERRUPTIBLE);
 269         while (!schedule_timeout(100)) {
 270                 if (mutex_lock_interruptible(&sd->gspca_dev.usb_lock))
 271                         break;
 272
 273                 s5k83a_get_rotation(sd, &reg);
 274                 if (previous_rotation != reg) {
 275                         previous_rotation = reg;
 276                         info("Camera was flipped");
 277
 278                         s5k83a_get_vflip((struct gspca_dev *) sd, &vflip);
 279                         s5k83a_get_hflip((struct gspca_dev *) sd, &hflip);
 280
 281                         if (reg) {
 282                                 vflip = !vflip;
 283                                 hflip = !hflip;
 284                         }
 285                         s5k83a_set_flip_real((struct gspca_dev *) sd,
 286                                               vflip, hflip);
 287                 }
 288
 289                 mutex_unlock(&sd->gspca_dev.usb_lock);
 290                 set_current_state(TASK_INTERRUPTIBLE);
 291         }
 292
 293         /* return to "front" flip */
 294         if (previous_rotation) {
 295                 s5k83a_get_vflip((struct gspca_dev *) sd, &vflip);
 296                 s5k83a_get_hflip((struct gspca_dev *) sd, &hflip);
 297                 s5k83a_set_flip_real((struct gspca_dev *) sd, vflip, hflip);
 298         }
 299
 300         sens_priv->rotation_thread = NULL;
 301         return 0;
 302 }
 303
 304 int s5k83a_start(struct sd *sd)
 305 {
 306         int i, err = 0;
 307         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 308
 309         /* Create another thread, polling the GPIO ports of the camera to check
 310            if it got rotated. This is how the windows driver does it so we have
 311            to assume that there is no better way of accomplishing this */
 312         sens_priv->rotation_thread = kthread_create(rotation_thread_function,
 313                                                     sd, "rotation thread");
 314         wake_up_process(sens_priv->rotation_thread);
 315
 316         /* Preinit the sensor */
 317         for (i = 0; i < ARRAY_SIZE(start_s5k83a) && !err; i++) {
 318                 u8 data[2] = {start_s5k83a[i][2], start_s5k83a[i][3]};
 319                 if (start_s5k83a[i][0] == SENSOR)
 320                         err = m5602_write_sensor(sd, start_s5k83a[i][1],
 321                                 data, 2);
 322                 else
 323                         err = m5602_write_bridge(sd, start_s5k83a[i][1],
 324                                 data[0]);
 325         }
 326         if (err < 0)
 327                 return err;
 328
 329         return s5k83a_set_led_indication(sd, 1);
 330 }
 331
 332 int s5k83a_stop(struct sd *sd)
 333 {
 334         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 335
 336         if (sens_priv->rotation_thread)
 337                 kthread_stop(sens_priv->rotation_thread);
 338
 339         return s5k83a_set_led_indication(sd, 0);
 340 }
 341
 342 void s5k83a_disconnect(struct sd *sd)
 343 {
 344         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 345
 346         s5k83a_stop(sd);
 347
 348         sd->sensor = NULL;
 349         kfree(sens_priv->settings);
 350         kfree(sens_priv);
 351 }
 352
 353 static int s5k83a_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
 354 {
 355         struct sd *sd = (struct sd *) gspca_dev;
 356         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 357
 358         *val = sens_priv->settings[GAIN_IDX];
 359         return 0;
 360 }
 361
 362 static int s5k83a_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 363 {
 364         int err;
 365         u8 data[2];
 366         struct sd *sd = (struct sd *) gspca_dev;
 367         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 368
 369         sens_priv->settings[GAIN_IDX] = val;
 370
 371         data[0] = 0x00;
 372         data[1] = 0x20;
 373         err = m5602_write_sensor(sd, 0x14, data, 2);
 374         if (err < 0)
 375                 return err;
 376
 377         data[0] = 0x01;
 378         data[1] = 0x00;
 379         err = m5602_write_sensor(sd, 0x0d, data, 2);
 380         if (err < 0)
 381                 return err;
 382
 383         /* FIXME: This is not sane, we need to figure out the composition
 384                   of these registers */
 385         data[0] = val >> 3; /* gain, high 5 bits */
 386         data[1] = val >> 1; /* gain, high 7 bits */
 387         err = m5602_write_sensor(sd, S5K83A_GAIN, data, 2);
 388
 389         return err;
 390 }
 391
 392 static int s5k83a_get_brightness(struct gspca_dev *gspca_dev, __s32 *val)
 393 {
 394         struct sd *sd = (struct sd *) gspca_dev;
 395         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 396
 397         *val = sens_priv->settings[BRIGHTNESS_IDX];
 398         return 0;
 399 }
 400
 401 static int s5k83a_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
 402 {
 403         int err;
 404         u8 data[1];
 405         struct sd *sd = (struct sd *) gspca_dev;
 406         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 407
 408         sens_priv->settings[BRIGHTNESS_IDX] = val;
 409         data[0] = val;
 410         err = m5602_write_sensor(sd, S5K83A_BRIGHTNESS, data, 1);
 411         return err;
 412 }
 413
 414 static int s5k83a_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
 415 {
 416         struct sd *sd = (struct sd *) gspca_dev;
 417         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 418
 419         *val = sens_priv->settings[EXPOSURE_IDX];
 420         return 0;
 421 }
 422
 423 static int s5k83a_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
 424 {
 425         int err;
 426         u8 data[2];
 427         struct sd *sd = (struct sd *) gspca_dev;
 428         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 429
 430         sens_priv->settings[EXPOSURE_IDX] = val;
 431         data[0] = 0;
 432         data[1] = val;
 433         err = m5602_write_sensor(sd, S5K83A_EXPOSURE, data, 2);
 434         return err;
 435 }
 436
 437 static int s5k83a_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
 438 {
 439         struct sd *sd = (struct sd *) gspca_dev;
 440         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 441
 442         *val = sens_priv->settings[VFLIP_IDX];
 443         return 0;
 444 }
 445
 446 static int s5k83a_set_flip_real(struct gspca_dev *gspca_dev,
 447                                 __s32 vflip, __s32 hflip)
 448 {
 449         int err;
 450         u8 data[1];
 451         struct sd *sd = (struct sd *) gspca_dev;
 452
 453         data[0] = 0x05;
 454         err = m5602_write_sensor(sd, S5K83A_PAGE_MAP, data, 1);
 455         if (err < 0)
 456                 return err;
 457
 458         /* six bit is vflip, seven is hflip */
 459         data[0] = S5K83A_FLIP_MASK;
 460         data[0] = (vflip) ? data[0] | 0x40 : data[0];
 461         data[0] = (hflip) ? data[0] | 0x80 : data[0];
 462
 463         err = m5602_write_sensor(sd, S5K83A_FLIP, data, 1);
 464         if (err < 0)
 465                 return err;
 466
 467         data[0] = (vflip) ? 0x0b : 0x0a;
 468         err = m5602_write_sensor(sd, S5K83A_VFLIP_TUNE, data, 1);
 469         if (err < 0)
 470                 return err;
 471
 472         data[0] = (hflip) ? 0x0a : 0x0b;
 473         err = m5602_write_sensor(sd, S5K83A_HFLIP_TUNE, data, 1);
 474         return err;
 475 }
 476
 477 static int s5k83a_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
 478 {
 479         int err;
 480         u8 reg;
 481         __s32 hflip;
 482         struct sd *sd = (struct sd *) gspca_dev;
 483         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 484
 485         sens_priv->settings[VFLIP_IDX] = val;
 486
 487         s5k83a_get_hflip(gspca_dev, &hflip);
 488
 489         err = s5k83a_get_rotation(sd, &reg);
 490         if (err < 0)
 491                 return err;
 492         if (reg) {
 493                 val = !val;
 494                 hflip = !hflip;
 495         }
 496
 497         err = s5k83a_set_flip_real(gspca_dev, val, hflip);
 498         return err;
 499 }
 500
 501 static int s5k83a_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
 502 {
 503         struct sd *sd = (struct sd *) gspca_dev;
 504         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 505
 506         *val = sens_priv->settings[HFLIP_IDX];
 507         return 0;
 508 }
 509
 510 static int s5k83a_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
 511 {
 512         int err;
 513         u8 reg;
 514         __s32 vflip;
 515         struct sd *sd = (struct sd *) gspca_dev;
 516         struct s5k83a_priv *sens_priv = sd->sensor_priv;
 517
 518         sens_priv->settings[HFLIP_IDX] = val;
 519
 520         s5k83a_get_vflip(gspca_dev, &vflip);
 521
 522         err = s5k83a_get_rotation(sd, &reg);
 523         if (err < 0)
 524                 return err;
 525         if (reg) {
 526                 val = !val;
 527                 vflip = !vflip;
 528         }
 529
 530         err = s5k83a_set_flip_real(gspca_dev, vflip, val);
 531         return err;
 532 }
 533
 534 static int s5k83a_set_led_indication(struct sd *sd, u8 val)
 535 {
 536         int err = 0;
 537         u8 data[1];
 538
 539         err = m5602_read_bridge(sd, M5602_XB_GPIO_DAT, data);
 540         if (err < 0)
 541                 return err;
 542
 543         if (val)
 544                 data[0] = data[0] | S5K83A_GPIO_LED_MASK;
 545         else
 546                 data[0] = data[0] & ~S5K83A_GPIO_LED_MASK;
 547
 548         err = m5602_write_bridge(sd, M5602_XB_GPIO_DAT, data[0]);
 549
 550         return err;
 551 }
 552
 553 /* Get camera rotation on Acer notebooks */
 554 static int s5k83a_get_rotation(struct sd *sd, u8 *reg_data)
 555 {
 556         int err = m5602_read_bridge(sd, M5602_XB_GPIO_DAT, reg_data);
 557         *reg_data = (*reg_data & S5K83A_GPIO_ROTATION_MASK) ? 0 : 1;
 558         return err;
 559 }
 560
 561 static void s5k83a_dump_registers(struct sd *sd)
 562 {
 563         int address;
 564         u8 page, old_page;
 565         m5602_read_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1);
 566
 567         for (page = 0; page < 16; page++) {
 568                 m5602_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1);
 569                 info("Dumping the s5k83a register state for page 0x%x", page);
 570                 for (address = 0; address <= 0xff; address++) {
 571                         u8 val = 0;
 572                         m5602_read_sensor(sd, address, &val, 1);
 573                         info("register 0x%x contains 0x%x",
 574                              address, val);
 575                 }
 576         }
 577         info("s5k83a register state dump complete");
 578
 579         for (page = 0; page < 16; page++) {
 580                 m5602_write_sensor(sd, S5K83A_PAGE_MAP, &page, 1);
 581                 info("Probing for which registers that are read/write "
 582                                 "for page 0x%x", page);
 583                 for (address = 0; address <= 0xff; address++) {
 584                         u8 old_val, ctrl_val, test_val = 0xff;
 585
 586                         m5602_read_sensor(sd, address, &old_val, 1);
 587                         m5602_write_sensor(sd, address, &test_val, 1);
 588                         m5602_read_sensor(sd, address, &ctrl_val, 1);
 589
 590                         if (ctrl_val == test_val)
 591                                 info("register 0x%x is writeable", address);
 592                         else
 593                                 info("register 0x%x is read only", address);
 594
 595                         /* Restore original val */
 596                         m5602_write_sensor(sd, address, &old_val, 1);
 597                 }
 598         }
 599         info("Read/write register probing complete");
 600         m5602_write_sensor(sd, S5K83A_PAGE_MAP, &old_page, 1);
 601 }