drivers/media/i2c/imx214.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * imx214.c - imx214 sensor driver
   4  *
   5  * Copyright 2018 Qtechnology A/S
   6  *
   7  * Ricardo Ribalda <ricardo.ribalda@gmail.com>
   8  */
   9 #include <linux/clk.h>
  10 #include <linux/delay.h>
  11 #include <linux/gpio/consumer.h>
  12 #include <linux/i2c.h>
  13 #include <linux/module.h>
  14 #include <linux/pm_runtime.h>
  15 #include <linux/regmap.h>
  16 #include <linux/regulator/consumer.h>
  17 #include <media/media-entity.h>
  18 #include <media/v4l2-ctrls.h>
  19 #include <media/v4l2-fwnode.h>
  20 #include <media/v4l2-subdev.h>
  21
  22 #define IMX214_DEFAULT_CLK_FREQ 24000000
  23 #define IMX214_DEFAULT_LINK_FREQ 480000000
  24 #define IMX214_DEFAULT_PIXEL_RATE ((IMX214_DEFAULT_LINK_FREQ * 8LL) / 10)
  25 #define IMX214_FPS 30
  26 #define IMX214_MBUS_CODE MEDIA_BUS_FMT_SRGGB10_1X10
  27
  28 static const char * const imx214_supply_name[] = {
  29         "vdda",
  30         "vddd",
  31         "vdddo",
  32 };
  33
  34 #define IMX214_NUM_SUPPLIES ARRAY_SIZE(imx214_supply_name)
  35
  36 struct imx214 {
  37         struct device *dev;
  38         struct clk *xclk;
  39         struct regmap *regmap;
  40
  41         struct v4l2_subdev sd;
  42         struct media_pad pad;
  43         struct v4l2_mbus_framefmt fmt;
  44         struct v4l2_rect crop;
  45
  46         struct v4l2_ctrl_handler ctrls;
  47         struct v4l2_ctrl *pixel_rate;
  48         struct v4l2_ctrl *link_freq;
  49         struct v4l2_ctrl *exposure;
  50
  51         struct regulator_bulk_data      supplies[IMX214_NUM_SUPPLIES];
  52
  53         struct gpio_desc *enable_gpio;
  54
  55         /*
  56          * Serialize control access, get/set format, get selection
  57          * and start streaming.
  58          */
  59         struct mutex mutex;
  60
  61         bool streaming;
  62 };
  63
  64 struct reg_8 {
  65         u16 addr;
  66         u8 val;
  67 };
  68
  69 enum {
  70         IMX214_TABLE_WAIT_MS = 0,
  71         IMX214_TABLE_END,
  72         IMX214_MAX_RETRIES,
  73         IMX214_WAIT_MS
  74 };
  75
  76 /*From imx214_mode_tbls.h*/
  77 static const struct reg_8 mode_4096x2304[] = {
  78         {0x0114, 0x03},
  79         {0x0220, 0x00},
  80         {0x0221, 0x11},
  81         {0x0222, 0x01},
  82         {0x0340, 0x0C},
  83         {0x0341, 0x7A},
  84         {0x0342, 0x13},
  85         {0x0343, 0x90},
  86         {0x0344, 0x00},
  87         {0x0345, 0x38},
  88         {0x0346, 0x01},
  89         {0x0347, 0x98},
  90         {0x0348, 0x10},
  91         {0x0349, 0x37},
  92         {0x034A, 0x0A},
  93         {0x034B, 0x97},
  94         {0x0381, 0x01},
  95         {0x0383, 0x01},
  96         {0x0385, 0x01},
  97         {0x0387, 0x01},
  98         {0x0900, 0x00},
  99         {0x0901, 0x00},
 100         {0x0902, 0x00},
 101         {0x3000, 0x35},
 102         {0x3054, 0x01},
 103         {0x305C, 0x11},
 104
 105         {0x0112, 0x0A},
 106         {0x0113, 0x0A},
 107         {0x034C, 0x10},
 108         {0x034D, 0x00},
 109         {0x034E, 0x09},
 110         {0x034F, 0x00},
 111         {0x0401, 0x00},
 112         {0x0404, 0x00},
 113         {0x0405, 0x10},
 114         {0x0408, 0x00},
 115         {0x0409, 0x00},
 116         {0x040A, 0x00},
 117         {0x040B, 0x00},
 118         {0x040C, 0x10},
 119         {0x040D, 0x00},
 120         {0x040E, 0x09},
 121         {0x040F, 0x00},
 122
 123         {0x0301, 0x05},
 124         {0x0303, 0x02},
 125         {0x0305, 0x03},
 126         {0x0306, 0x00},
 127         {0x0307, 0x96},
 128         {0x0309, 0x0A},
 129         {0x030B, 0x01},
 130         {0x0310, 0x00},
 131
 132         {0x0820, 0x12},
 133         {0x0821, 0xC0},
 134         {0x0822, 0x00},
 135         {0x0823, 0x00},
 136
 137         {0x3A03, 0x09},
 138         {0x3A04, 0x50},
 139         {0x3A05, 0x01},
 140
 141         {0x0B06, 0x01},
 142         {0x30A2, 0x00},
 143
 144         {0x30B4, 0x00},
 145
 146         {0x3A02, 0xFF},
 147
 148         {0x3011, 0x00},
 149         {0x3013, 0x01},
 150
 151         {0x0202, 0x0C},
 152         {0x0203, 0x70},
 153         {0x0224, 0x01},
 154         {0x0225, 0xF4},
 155
 156         {0x0204, 0x00},
 157         {0x0205, 0x00},
 158         {0x020E, 0x01},
 159         {0x020F, 0x00},
 160         {0x0210, 0x01},
 161         {0x0211, 0x00},
 162         {0x0212, 0x01},
 163         {0x0213, 0x00},
 164         {0x0214, 0x01},
 165         {0x0215, 0x00},
 166         {0x0216, 0x00},
 167         {0x0217, 0x00},
 168
 169         {0x4170, 0x00},
 170         {0x4171, 0x10},
 171         {0x4176, 0x00},
 172         {0x4177, 0x3C},
 173         {0xAE20, 0x04},
 174         {0xAE21, 0x5C},
 175
 176         {IMX214_TABLE_WAIT_MS, 10},
 177         {0x0138, 0x01},
 178         {IMX214_TABLE_END, 0x00}
 179 };
 180
 181 static const struct reg_8 mode_1920x1080[] = {
 182         {0x0114, 0x03},
 183         {0x0220, 0x00},
 184         {0x0221, 0x11},
 185         {0x0222, 0x01},
 186         {0x0340, 0x0C},
 187         {0x0341, 0x7A},
 188         {0x0342, 0x13},
 189         {0x0343, 0x90},
 190         {0x0344, 0x04},
 191         {0x0345, 0x78},
 192         {0x0346, 0x03},
 193         {0x0347, 0xFC},
 194         {0x0348, 0x0B},
 195         {0x0349, 0xF7},
 196         {0x034A, 0x08},
 197         {0x034B, 0x33},
 198         {0x0381, 0x01},
 199         {0x0383, 0x01},
 200         {0x0385, 0x01},
 201         {0x0387, 0x01},
 202         {0x0900, 0x00},
 203         {0x0901, 0x00},
 204         {0x0902, 0x00},
 205         {0x3000, 0x35},
 206         {0x3054, 0x01},
 207         {0x305C, 0x11},
 208
 209         {0x0112, 0x0A},
 210         {0x0113, 0x0A},
 211         {0x034C, 0x07},
 212         {0x034D, 0x80},
 213         {0x034E, 0x04},
 214         {0x034F, 0x38},
 215         {0x0401, 0x00},
 216         {0x0404, 0x00},
 217         {0x0405, 0x10},
 218         {0x0408, 0x00},
 219         {0x0409, 0x00},
 220         {0x040A, 0x00},
 221         {0x040B, 0x00},
 222         {0x040C, 0x07},
 223         {0x040D, 0x80},
 224         {0x040E, 0x04},
 225         {0x040F, 0x38},
 226
 227         {0x0301, 0x05},
 228         {0x0303, 0x02},
 229         {0x0305, 0x03},
 230         {0x0306, 0x00},
 231         {0x0307, 0x96},
 232         {0x0309, 0x0A},
 233         {0x030B, 0x01},
 234         {0x0310, 0x00},
 235
 236         {0x0820, 0x12},
 237         {0x0821, 0xC0},
 238         {0x0822, 0x00},
 239         {0x0823, 0x00},
 240
 241         {0x3A03, 0x04},
 242         {0x3A04, 0xF8},
 243         {0x3A05, 0x02},
 244
 245         {0x0B06, 0x01},
 246         {0x30A2, 0x00},
 247
 248         {0x30B4, 0x00},
 249
 250         {0x3A02, 0xFF},
 251
 252         {0x3011, 0x00},
 253         {0x3013, 0x01},
 254
 255         {0x0202, 0x0C},
 256         {0x0203, 0x70},
 257         {0x0224, 0x01},
 258         {0x0225, 0xF4},
 259
 260         {0x0204, 0x00},
 261         {0x0205, 0x00},
 262         {0x020E, 0x01},
 263         {0x020F, 0x00},
 264         {0x0210, 0x01},
 265         {0x0211, 0x00},
 266         {0x0212, 0x01},
 267         {0x0213, 0x00},
 268         {0x0214, 0x01},
 269         {0x0215, 0x00},
 270         {0x0216, 0x00},
 271         {0x0217, 0x00},
 272
 273         {0x4170, 0x00},
 274         {0x4171, 0x10},
 275         {0x4176, 0x00},
 276         {0x4177, 0x3C},
 277         {0xAE20, 0x04},
 278         {0xAE21, 0x5C},
 279
 280         {IMX214_TABLE_WAIT_MS, 10},
 281         {0x0138, 0x01},
 282         {IMX214_TABLE_END, 0x00}
 283 };
 284
 285 static const struct reg_8 mode_table_common[] = {
 286         /* software reset */
 287
 288         /* software standby settings */
 289         {0x0100, 0x00},
 290
 291         /* ATR setting */
 292         {0x9300, 0x02},
 293
 294         /* external clock setting */
 295         {0x0136, 0x18},
 296         {0x0137, 0x00},
 297
 298         /* global setting */
 299         /* basic config */
 300         {0x0101, 0x00},
 301         {0x0105, 0x01},
 302         {0x0106, 0x01},
 303         {0x4550, 0x02},
 304         {0x4601, 0x00},
 305         {0x4642, 0x05},
 306         {0x6227, 0x11},
 307         {0x6276, 0x00},
 308         {0x900E, 0x06},
 309         {0xA802, 0x90},
 310         {0xA803, 0x11},
 311         {0xA804, 0x62},
 312         {0xA805, 0x77},
 313         {0xA806, 0xAE},
 314         {0xA807, 0x34},
 315         {0xA808, 0xAE},
 316         {0xA809, 0x35},
 317         {0xA80A, 0x62},
 318         {0xA80B, 0x83},
 319         {0xAE33, 0x00},
 320
 321         /* analog setting */
 322         {0x4174, 0x00},
 323         {0x4175, 0x11},
 324         {0x4612, 0x29},
 325         {0x461B, 0x12},
 326         {0x461F, 0x06},
 327         {0x4635, 0x07},
 328         {0x4637, 0x30},
 329         {0x463F, 0x18},
 330         {0x4641, 0x0D},
 331         {0x465B, 0x12},
 332         {0x465F, 0x11},
 333         {0x4663, 0x11},
 334         {0x4667, 0x0F},
 335         {0x466F, 0x0F},
 336         {0x470E, 0x09},
 337         {0x4909, 0xAB},
 338         {0x490B, 0x95},
 339         {0x4915, 0x5D},
 340         {0x4A5F, 0xFF},
 341         {0x4A61, 0xFF},
 342         {0x4A73, 0x62},
 343         {0x4A85, 0x00},
 344         {0x4A87, 0xFF},
 345
 346         /* embedded data */
 347         {0x5041, 0x04},
 348         {0x583C, 0x04},
 349         {0x620E, 0x04},
 350         {0x6EB2, 0x01},
 351         {0x6EB3, 0x00},
 352         {0x9300, 0x02},
 353
 354         /* imagequality */
 355         /* HDR setting */
 356         {0x3001, 0x07},
 357         {0x6D12, 0x3F},
 358         {0x6D13, 0xFF},
 359         {0x9344, 0x03},
 360         {0x9706, 0x10},
 361         {0x9707, 0x03},
 362         {0x9708, 0x03},
 363         {0x9E04, 0x01},
 364         {0x9E05, 0x00},
 365         {0x9E0C, 0x01},
 366         {0x9E0D, 0x02},
 367         {0x9E24, 0x00},
 368         {0x9E25, 0x8C},
 369         {0x9E26, 0x00},
 370         {0x9E27, 0x94},
 371         {0x9E28, 0x00},
 372         {0x9E29, 0x96},
 373
 374         /* CNR parameter setting */
 375         {0x69DB, 0x01},
 376
 377         /* Moire reduction */
 378         {0x6957, 0x01},
 379
 380         /* image enhancement */
 381         {0x6987, 0x17},
 382         {0x698A, 0x03},
 383         {0x698B, 0x03},
 384
 385         /* white balanace */
 386         {0x0B8E, 0x01},
 387         {0x0B8F, 0x00},
 388         {0x0B90, 0x01},
 389         {0x0B91, 0x00},
 390         {0x0B92, 0x01},
 391         {0x0B93, 0x00},
 392         {0x0B94, 0x01},
 393         {0x0B95, 0x00},
 394
 395         /* ATR setting */
 396         {0x6E50, 0x00},
 397         {0x6E51, 0x32},
 398         {0x9340, 0x00},
 399         {0x9341, 0x3C},
 400         {0x9342, 0x03},
 401         {0x9343, 0xFF},
 402         {IMX214_TABLE_END, 0x00}
 403 };
 404
 405 /*
 406  * Declare modes in order, from biggest
 407  * to smallest height.
 408  */
 409 static const struct imx214_mode {
 410         u32 width;
 411         u32 height;
 412         const struct reg_8 *reg_table;
 413 } imx214_modes[] = {
 414         {
 415                 .width = 4096,
 416                 .height = 2304,
 417                 .reg_table = mode_4096x2304,
 418         },
 419         {
 420                 .width = 1920,
 421                 .height = 1080,
 422                 .reg_table = mode_1920x1080,
 423         },
 424 };
 425
 426 static inline struct imx214 *to_imx214(struct v4l2_subdev *sd)
 427 {
 428         return container_of(sd, struct imx214, sd);
 429 }
 430
 431 static int __maybe_unused imx214_power_on(struct device *dev)
 432 {
 433         struct i2c_client *client = to_i2c_client(dev);
 434         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 435         struct imx214 *imx214 = to_imx214(sd);
 436         int ret;
 437
 438         ret = regulator_bulk_enable(IMX214_NUM_SUPPLIES, imx214->supplies);
 439         if (ret < 0) {
 440                 dev_err(imx214->dev, "failed to enable regulators: %d\n", ret);
 441                 return ret;
 442         }
 443
 444         usleep_range(2000, 3000);
 445
 446         ret = clk_prepare_enable(imx214->xclk);
 447         if (ret < 0) {
 448                 regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
 449                 dev_err(imx214->dev, "clk prepare enable failed\n");
 450                 return ret;
 451         }
 452
 453         gpiod_set_value_cansleep(imx214->enable_gpio, 1);
 454         usleep_range(12000, 15000);
 455
 456         return 0;
 457 }
 458
 459 static int __maybe_unused imx214_power_off(struct device *dev)
 460 {
 461         struct i2c_client *client = to_i2c_client(dev);
 462         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 463         struct imx214 *imx214 = to_imx214(sd);
 464
 465         gpiod_set_value_cansleep(imx214->enable_gpio, 0);
 466
 467         clk_disable_unprepare(imx214->xclk);
 468
 469         regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
 470         usleep_range(10, 20);
 471
 472         return 0;
 473 }
 474
 475 static int imx214_enum_mbus_code(struct v4l2_subdev *sd,
 476                                  struct v4l2_subdev_pad_config *cfg,
 477                                  struct v4l2_subdev_mbus_code_enum *code)
 478 {
 479         if (code->index > 0)
 480                 return -EINVAL;
 481
 482         code->code = IMX214_MBUS_CODE;
 483
 484         return 0;
 485 }
 486
 487 static int imx214_enum_frame_size(struct v4l2_subdev *subdev,
 488                                   struct v4l2_subdev_pad_config *cfg,
 489                                   struct v4l2_subdev_frame_size_enum *fse)
 490 {
 491         if (fse->code != IMX214_MBUS_CODE)
 492                 return -EINVAL;
 493
 494         if (fse->index >= ARRAY_SIZE(imx214_modes))
 495                 return -EINVAL;
 496
 497         fse->min_width = fse->max_width = imx214_modes[fse->index].width;
 498         fse->min_height = fse->max_height = imx214_modes[fse->index].height;
 499
 500         return 0;
 501 }
 502
 503 #ifdef CONFIG_VIDEO_ADV_DEBUG
 504 static int imx214_s_register(struct v4l2_subdev *subdev,
 505                              const struct v4l2_dbg_register *reg)
 506 {
 507         struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
 508
 509         return regmap_write(imx214->regmap, reg->reg, reg->val);
 510 }
 511
 512 static int imx214_g_register(struct v4l2_subdev *subdev,
 513                              struct v4l2_dbg_register *reg)
 514 {
 515         struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
 516         unsigned int aux;
 517         int ret;
 518
 519         reg->size = 1;
 520         ret = regmap_read(imx214->regmap, reg->reg, &aux);
 521         reg->val = aux;
 522
 523         return ret;
 524 }
 525 #endif
 526
 527 static const struct v4l2_subdev_core_ops imx214_core_ops = {
 528 #ifdef CONFIG_VIDEO_ADV_DEBUG
 529         .g_register = imx214_g_register,
 530         .s_register = imx214_s_register,
 531 #endif
 532 };
 533
 534 static struct v4l2_mbus_framefmt *
 535 __imx214_get_pad_format(struct imx214 *imx214,
 536                         struct v4l2_subdev_pad_config *cfg,
 537                         unsigned int pad,
 538                         enum v4l2_subdev_format_whence which)
 539 {
 540         switch (which) {
 541         case V4L2_SUBDEV_FORMAT_TRY:
 542                 return v4l2_subdev_get_try_format(&imx214->sd, cfg, pad);
 543         case V4L2_SUBDEV_FORMAT_ACTIVE:
 544                 return &imx214->fmt;
 545         default:
 546                 return NULL;
 547         }
 548 }
 549
 550 static int imx214_get_format(struct v4l2_subdev *sd,
 551                              struct v4l2_subdev_pad_config *cfg,
 552                              struct v4l2_subdev_format *format)
 553 {
 554         struct imx214 *imx214 = to_imx214(sd);
 555
 556         mutex_lock(&imx214->mutex);
 557         format->format = *__imx214_get_pad_format(imx214, cfg, format->pad,
 558                                                   format->which);
 559         mutex_unlock(&imx214->mutex);
 560
 561         return 0;
 562 }
 563
 564 static struct v4l2_rect *
 565 __imx214_get_pad_crop(struct imx214 *imx214, struct v4l2_subdev_pad_config *cfg,
 566                       unsigned int pad, enum v4l2_subdev_format_whence which)
 567 {
 568         switch (which) {
 569         case V4L2_SUBDEV_FORMAT_TRY:
 570                 return v4l2_subdev_get_try_crop(&imx214->sd, cfg, pad);
 571         case V4L2_SUBDEV_FORMAT_ACTIVE:
 572                 return &imx214->crop;
 573         default:
 574                 return NULL;
 575         }
 576 }
 577
 578 static int imx214_set_format(struct v4l2_subdev *sd,
 579                              struct v4l2_subdev_pad_config *cfg,
 580                              struct v4l2_subdev_format *format)
 581 {
 582         struct imx214 *imx214 = to_imx214(sd);
 583         struct v4l2_mbus_framefmt *__format;
 584         struct v4l2_rect *__crop;
 585         const struct imx214_mode *mode;
 586
 587         mutex_lock(&imx214->mutex);
 588
 589         __crop = __imx214_get_pad_crop(imx214, cfg, format->pad, format->which);
 590
 591         mode = v4l2_find_nearest_size(imx214_modes,
 592                                       ARRAY_SIZE(imx214_modes), width, height,
 593                                       format->format.width,
 594                                       format->format.height);
 595
 596         __crop->width = mode->width;
 597         __crop->height = mode->height;
 598
 599         __format = __imx214_get_pad_format(imx214, cfg, format->pad,
 600                                            format->which);
 601         __format->width = __crop->width;
 602         __format->height = __crop->height;
 603         __format->code = IMX214_MBUS_CODE;
 604         __format->field = V4L2_FIELD_NONE;
 605         __format->colorspace = V4L2_COLORSPACE_SRGB;
 606         __format->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(__format->colorspace);
 607         __format->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
 608                                 __format->colorspace, __format->ycbcr_enc);
 609         __format->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(__format->colorspace);
 610
 611         format->format = *__format;
 612
 613         mutex_unlock(&imx214->mutex);
 614
 615         return 0;
 616 }
 617
 618 static int imx214_get_selection(struct v4l2_subdev *sd,
 619                                 struct v4l2_subdev_pad_config *cfg,
 620                                 struct v4l2_subdev_selection *sel)
 621 {
 622         struct imx214 *imx214 = to_imx214(sd);
 623
 624         if (sel->target != V4L2_SEL_TGT_CROP)
 625                 return -EINVAL;
 626
 627         mutex_lock(&imx214->mutex);
 628         sel->r = *__imx214_get_pad_crop(imx214, cfg, sel->pad,
 629                                         sel->which);
 630         mutex_unlock(&imx214->mutex);
 631         return 0;
 632 }
 633
 634 static int imx214_entity_init_cfg(struct v4l2_subdev *subdev,
 635                                   struct v4l2_subdev_pad_config *cfg)
 636 {
 637         struct v4l2_subdev_format fmt = { };
 638
 639         fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 640         fmt.format.width = imx214_modes[0].width;
 641         fmt.format.height = imx214_modes[0].height;
 642
 643         imx214_set_format(subdev, cfg, &fmt);
 644
 645         return 0;
 646 }
 647
 648 static int imx214_set_ctrl(struct v4l2_ctrl *ctrl)
 649 {
 650         struct imx214 *imx214 = container_of(ctrl->handler,
 651                                              struct imx214, ctrls);
 652         u8 vals[2];
 653         int ret;
 654
 655         /*
 656          * Applying V4L2 control value only happens
 657          * when power is up for streaming
 658          */
 659         if (!pm_runtime_get_if_in_use(imx214->dev))
 660                 return 0;
 661
 662         switch (ctrl->id) {
 663         case V4L2_CID_EXPOSURE:
 664                 vals[1] = ctrl->val;
 665                 vals[0] = ctrl->val >> 8;
 666                 ret = regmap_bulk_write(imx214->regmap, 0x202, vals, 2);
 667                 if (ret < 0)
 668                         dev_err(imx214->dev, "Error %d\n", ret);
 669                 ret = 0;
 670                 break;
 671
 672         default:
 673                 ret = -EINVAL;
 674         }
 675
 676         pm_runtime_put(imx214->dev);
 677
 678         return ret;
 679 }
 680
 681 static const struct v4l2_ctrl_ops imx214_ctrl_ops = {
 682         .s_ctrl = imx214_set_ctrl,
 683 };
 684
 685 #define MAX_CMD 4
 686 static int imx214_write_table(struct imx214 *imx214,
 687                               const struct reg_8 table[])
 688 {
 689         u8 vals[MAX_CMD];
 690         int i;
 691         int ret;
 692
 693         for (; table->addr != IMX214_TABLE_END ; table++) {
 694                 if (table->addr == IMX214_TABLE_WAIT_MS) {
 695                         usleep_range(table->val * 1000,
 696                                      table->val * 1000 + 500);
 697                         continue;
 698                 }
 699
 700                 for (i = 0; i < MAX_CMD; i++) {
 701                         if (table[i].addr != (table[0].addr + i))
 702                                 break;
 703                         vals[i] = table[i].val;
 704                 }
 705
 706                 ret = regmap_bulk_write(imx214->regmap, table->addr, vals, i);
 707
 708                 if (ret) {
 709                         dev_err(imx214->dev, "write_table error: %d\n", ret);
 710                         return ret;
 711                 }
 712
 713                 table += i - 1;
 714         }
 715
 716         return 0;
 717 }
 718
 719 static int imx214_start_streaming(struct imx214 *imx214)
 720 {
 721         const struct imx214_mode *mode;
 722         int ret;
 723
 724         mutex_lock(&imx214->mutex);
 725         ret = imx214_write_table(imx214, mode_table_common);
 726         if (ret < 0) {
 727                 dev_err(imx214->dev, "could not sent common table %d\n", ret);
 728                 goto error;
 729         }
 730
 731         mode = v4l2_find_nearest_size(imx214_modes,
 732                                 ARRAY_SIZE(imx214_modes), width, height,
 733                                 imx214->fmt.width, imx214->fmt.height);
 734         ret = imx214_write_table(imx214, mode->reg_table);
 735         if (ret < 0) {
 736                 dev_err(imx214->dev, "could not sent mode table %d\n", ret);
 737                 goto error;
 738         }
 739         ret = __v4l2_ctrl_handler_setup(&imx214->ctrls);
 740         if (ret < 0) {
 741                 dev_err(imx214->dev, "could not sync v4l2 controls\n");
 742                 goto error;
 743         }
 744         ret = regmap_write(imx214->regmap, 0x100, 1);
 745         if (ret < 0) {
 746                 dev_err(imx214->dev, "could not sent start table %d\n", ret);
 747                 goto error;
 748         }
 749
 750         mutex_unlock(&imx214->mutex);
 751         return 0;
 752
 753 error:
 754         mutex_unlock(&imx214->mutex);
 755         return ret;
 756 }
 757
 758 static int imx214_stop_streaming(struct imx214 *imx214)
 759 {
 760         int ret;
 761
 762         ret = regmap_write(imx214->regmap, 0x100, 0);
 763         if (ret < 0)
 764                 dev_err(imx214->dev, "could not sent stop table %d\n",  ret);
 765
 766         return ret;
 767 }
 768
 769 static int imx214_s_stream(struct v4l2_subdev *subdev, int enable)
 770 {
 771         struct imx214 *imx214 = to_imx214(subdev);
 772         int ret;
 773
 774         if (imx214->streaming == enable)
 775                 return 0;
 776
 777         if (enable) {
 778                 ret = pm_runtime_get_sync(imx214->dev);
 779                 if (ret < 0) {
 780                         pm_runtime_put_noidle(imx214->dev);
 781                         return ret;
 782                 }
 783
 784                 ret = imx214_start_streaming(imx214);
 785                 if (ret < 0)
 786                         goto err_rpm_put;
 787         } else {
 788                 ret = imx214_start_streaming(imx214);
 789                 if (ret < 0)
 790                         goto err_rpm_put;
 791                 pm_runtime_put(imx214->dev);
 792         }
 793
 794         imx214->streaming = enable;
 795         return 0;
 796
 797 err_rpm_put:
 798         pm_runtime_put(imx214->dev);
 799         return ret;
 800 }
 801
 802 static int imx214_g_frame_interval(struct v4l2_subdev *subdev,
 803                                    struct v4l2_subdev_frame_interval *fival)
 804 {
 805         fival->pad = 0;
 806         fival->interval.numerator = 1;
 807         fival->interval.denominator = IMX214_FPS;
 808
 809         return 0;
 810 }
 811
 812 static int imx214_enum_frame_interval(struct v4l2_subdev *subdev,
 813                                 struct v4l2_subdev_pad_config *cfg,
 814                                 struct v4l2_subdev_frame_interval_enum *fie)
 815 {
 816         const struct imx214_mode *mode;
 817
 818         if (fie->index != 0)
 819                 return -EINVAL;
 820
 821         mode = v4l2_find_nearest_size(imx214_modes,
 822                                 ARRAY_SIZE(imx214_modes), width, height,
 823                                 fie->width, fie->height);
 824
 825         fie->code = IMX214_MBUS_CODE;
 826         fie->width = mode->width;
 827         fie->height = mode->height;
 828         fie->interval.numerator = 1;
 829         fie->interval.denominator = IMX214_FPS;
 830
 831         return 0;
 832 }
 833
 834 static const struct v4l2_subdev_video_ops imx214_video_ops = {
 835         .s_stream = imx214_s_stream,
 836         .g_frame_interval = imx214_g_frame_interval,
 837         .s_frame_interval = imx214_g_frame_interval,
 838 };
 839
 840 static const struct v4l2_subdev_pad_ops imx214_subdev_pad_ops = {
 841         .enum_mbus_code = imx214_enum_mbus_code,
 842         .enum_frame_size = imx214_enum_frame_size,
 843         .enum_frame_interval = imx214_enum_frame_interval,
 844         .get_fmt = imx214_get_format,
 845         .set_fmt = imx214_set_format,
 846         .get_selection = imx214_get_selection,
 847         .init_cfg = imx214_entity_init_cfg,
 848 };
 849
 850 static const struct v4l2_subdev_ops imx214_subdev_ops = {
 851         .core = &imx214_core_ops,
 852         .video = &imx214_video_ops,
 853         .pad = &imx214_subdev_pad_ops,
 854 };
 855
 856 static const struct regmap_config sensor_regmap_config = {
 857         .reg_bits = 16,
 858         .val_bits = 8,
 859         .cache_type = REGCACHE_RBTREE,
 860 };
 861
 862 static int imx214_get_regulators(struct device *dev, struct imx214 *imx214)
 863 {
 864         unsigned int i;
 865
 866         for (i = 0; i < IMX214_NUM_SUPPLIES; i++)
 867                 imx214->supplies[i].supply = imx214_supply_name[i];
 868
 869         return devm_regulator_bulk_get(dev, IMX214_NUM_SUPPLIES,
 870                                        imx214->supplies);
 871 }
 872
 873 static int imx214_parse_fwnode(struct device *dev)
 874 {
 875         struct fwnode_handle *endpoint;
 876         struct v4l2_fwnode_endpoint bus_cfg = {
 877                 .bus_type = V4L2_MBUS_CSI2_DPHY,
 878         };
 879         unsigned int i;
 880         int ret;
 881
 882         endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
 883         if (!endpoint) {
 884                 dev_err(dev, "endpoint node not found\n");
 885                 return -EINVAL;
 886         }
 887
 888         ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
 889         if (ret) {
 890                 dev_err(dev, "parsing endpoint node failed\n");
 891                 goto done;
 892         }
 893
 894         for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
 895                 if (bus_cfg.link_frequencies[i] == IMX214_DEFAULT_LINK_FREQ)
 896                         break;
 897
 898         if (i == bus_cfg.nr_of_link_frequencies) {
 899                 dev_err(dev, "link-frequencies %d not supported, Please review your DT\n",
 900                         IMX214_DEFAULT_LINK_FREQ);
 901                 ret = -EINVAL;
 902                 goto done;
 903         }
 904
 905 done:
 906         v4l2_fwnode_endpoint_free(&bus_cfg);
 907         fwnode_handle_put(endpoint);
 908         return ret;
 909 }
 910
 911 static int __maybe_unused imx214_suspend(struct device *dev)
 912 {
 913         struct i2c_client *client = to_i2c_client(dev);
 914         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 915         struct imx214 *imx214 = to_imx214(sd);
 916
 917         if (imx214->streaming)
 918                 imx214_stop_streaming(imx214);
 919
 920         return 0;
 921 }
 922
 923 static int __maybe_unused imx214_resume(struct device *dev)
 924 {
 925         struct i2c_client *client = to_i2c_client(dev);
 926         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 927         struct imx214 *imx214 = to_imx214(sd);
 928         int ret;
 929
 930         if (imx214->streaming) {
 931                 ret = imx214_start_streaming(imx214);
 932                 if (ret)
 933                         goto error;
 934         }
 935
 936         return 0;
 937
 938 error:
 939         imx214_stop_streaming(imx214);
 940         imx214->streaming = 0;
 941         return ret;
 942 }
 943
 944 static int imx214_probe(struct i2c_client *client)
 945 {
 946         struct device *dev = &client->dev;
 947         struct imx214 *imx214;
 948         static const s64 link_freq[] = {
 949                 IMX214_DEFAULT_LINK_FREQ,
 950         };
 951         int ret;
 952
 953         ret = imx214_parse_fwnode(dev);
 954         if (ret)
 955                 return ret;
 956
 957         imx214 = devm_kzalloc(dev, sizeof(*imx214), GFP_KERNEL);
 958         if (!imx214)
 959                 return -ENOMEM;
 960
 961         imx214->dev = dev;
 962
 963         imx214->xclk = devm_clk_get(dev, NULL);
 964         if (IS_ERR(imx214->xclk)) {
 965                 dev_err(dev, "could not get xclk");
 966                 return PTR_ERR(imx214->xclk);
 967         }
 968
 969         ret = clk_set_rate(imx214->xclk, IMX214_DEFAULT_CLK_FREQ);
 970         if (ret) {
 971                 dev_err(dev, "could not set xclk frequency\n");
 972                 return ret;
 973         }
 974
 975         ret = imx214_get_regulators(dev, imx214);
 976         if (ret < 0) {
 977                 dev_err(dev, "cannot get regulators\n");
 978                 return ret;
 979         }
 980
 981         imx214->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
 982         if (IS_ERR(imx214->enable_gpio)) {
 983                 dev_err(dev, "cannot get enable gpio\n");
 984                 return PTR_ERR(imx214->enable_gpio);
 985         }
 986
 987         imx214->regmap = devm_regmap_init_i2c(client, &sensor_regmap_config);
 988         if (IS_ERR(imx214->regmap)) {
 989                 dev_err(dev, "regmap init failed\n");
 990                 return PTR_ERR(imx214->regmap);
 991         }
 992
 993         v4l2_i2c_subdev_init(&imx214->sd, client, &imx214_subdev_ops);
 994
 995         /*
 996          * Enable power initially, to avoid warnings
 997          * from clk_disable on power_off
 998          */
 999         imx214_power_on(imx214->dev);
1000
1001         pm_runtime_set_active(imx214->dev);
1002         pm_runtime_enable(imx214->dev);
1003         pm_runtime_idle(imx214->dev);
1004
1005         v4l2_ctrl_handler_init(&imx214->ctrls, 3);
1006
1007         imx214->pixel_rate = v4l2_ctrl_new_std(&imx214->ctrls, NULL,
1008                                                V4L2_CID_PIXEL_RATE, 0,
1009                                                IMX214_DEFAULT_PIXEL_RATE, 1,
1010                                                IMX214_DEFAULT_PIXEL_RATE);
1011         imx214->link_freq = v4l2_ctrl_new_int_menu(&imx214->ctrls, NULL,
1012                                                    V4L2_CID_LINK_FREQ,
1013                                                    ARRAY_SIZE(link_freq) - 1,
1014                                                    0, link_freq);
1015         if (imx214->link_freq)
1016                 imx214->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1017
1018         /*
1019          * WARNING!
1020          * Values obtained reverse engineering blobs and/or devices.
1021          * Ranges and functionality might be wrong.
1022          *
1023          * Sony, please release some register set documentation for the
1024          * device.
1025          *
1026          * Yours sincerely, Ricardo.
1027          */
1028         imx214->exposure = v4l2_ctrl_new_std(&imx214->ctrls, &imx214_ctrl_ops,
1029                                              V4L2_CID_EXPOSURE,
1030                                              0, 3184, 1, 0x0c70);
1031
1032         ret = imx214->ctrls.error;
1033         if (ret) {
1034                 dev_err(&client->dev, "%s control init failed (%d)\n",
1035                         __func__, ret);
1036                 goto free_ctrl;
1037         }
1038
1039         imx214->sd.ctrl_handler = &imx214->ctrls;
1040         mutex_init(&imx214->mutex);
1041         imx214->ctrls.lock = &imx214->mutex;
1042
1043         imx214->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1044         imx214->pad.flags = MEDIA_PAD_FL_SOURCE;
1045         imx214->sd.dev = &client->dev;
1046         imx214->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1047
1048         ret = media_entity_pads_init(&imx214->sd.entity, 1, &imx214->pad);
1049         if (ret < 0) {
1050                 dev_err(dev, "could not register media entity\n");
1051                 goto free_ctrl;
1052         }
1053
1054         imx214_entity_init_cfg(&imx214->sd, NULL);
1055
1056         ret = v4l2_async_register_subdev_sensor_common(&imx214->sd);
1057         if (ret < 0) {
1058                 dev_err(dev, "could not register v4l2 device\n");
1059                 goto free_entity;
1060         }
1061
1062         return 0;
1063
1064 free_entity:
1065         media_entity_cleanup(&imx214->sd.entity);
1066 free_ctrl:
1067         mutex_destroy(&imx214->mutex);
1068         v4l2_ctrl_handler_free(&imx214->ctrls);
1069         pm_runtime_disable(imx214->dev);
1070
1071         return ret;
1072 }
1073
1074 static int imx214_remove(struct i2c_client *client)
1075 {
1076         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1077         struct imx214 *imx214 = to_imx214(sd);
1078
1079         v4l2_async_unregister_subdev(&imx214->sd);
1080         media_entity_cleanup(&imx214->sd.entity);
1081         v4l2_ctrl_handler_free(&imx214->ctrls);
1082
1083         pm_runtime_disable(&client->dev);
1084         pm_runtime_set_suspended(&client->dev);
1085
1086         mutex_destroy(&imx214->mutex);
1087
1088         return 0;
1089 }
1090
1091 static const struct of_device_id imx214_of_match[] = {
1092         { .compatible = "sony,imx214" },
1093         { }
1094 };
1095 MODULE_DEVICE_TABLE(of, imx214_of_match);
1096
1097 static const struct dev_pm_ops imx214_pm_ops = {
1098         SET_SYSTEM_SLEEP_PM_OPS(imx214_suspend, imx214_resume)
1099         SET_RUNTIME_PM_OPS(imx214_power_off, imx214_power_on, NULL)
1100 };
1101
1102 static struct i2c_driver imx214_i2c_driver = {
1103         .driver = {
1104                 .of_match_table = imx214_of_match,
1105                 .pm = &imx214_pm_ops,
1106                 .name  = "imx214",
1107         },
1108         .probe_new  = imx214_probe,
1109         .remove = imx214_remove,
1110 };
1111
1112 module_i2c_driver(imx214_i2c_driver);
1113
1114 MODULE_DESCRIPTION("Sony IMX214 Camera driver");
1115 MODULE_AUTHOR("Ricardo Ribalda <ricardo.ribalda@gmail.com>");
1116 MODULE_LICENSE("GPL v2");