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 <ribalda@kernel.org>
   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         struct v4l2_ctrl *unit_size;
  51
  52         struct regulator_bulk_data      supplies[IMX214_NUM_SUPPLIES];
  53
  54         struct gpio_desc *enable_gpio;
  55
  56         /*
  57          * Serialize control access, get/set format, get selection
  58          * and start streaming.
  59          */
  60         struct mutex mutex;
  61 };
  62
  63 struct reg_8 {
  64         u16 addr;
  65         u8 val;
  66 };
  67
  68 enum {
  69         IMX214_TABLE_WAIT_MS = 0,
  70         IMX214_TABLE_END,
  71         IMX214_MAX_RETRIES,
  72         IMX214_WAIT_MS
  73 };
  74
  75 /*From imx214_mode_tbls.h*/
  76 static const struct reg_8 mode_4096x2304[] = {
  77         {0x0114, 0x03},
  78         {0x0220, 0x00},
  79         {0x0221, 0x11},
  80         {0x0222, 0x01},
  81         {0x0340, 0x0C},
  82         {0x0341, 0x7A},
  83         {0x0342, 0x13},
  84         {0x0343, 0x90},
  85         {0x0344, 0x00},
  86         {0x0345, 0x38},
  87         {0x0346, 0x01},
  88         {0x0347, 0x98},
  89         {0x0348, 0x10},
  90         {0x0349, 0x37},
  91         {0x034A, 0x0A},
  92         {0x034B, 0x97},
  93         {0x0381, 0x01},
  94         {0x0383, 0x01},
  95         {0x0385, 0x01},
  96         {0x0387, 0x01},
  97         {0x0900, 0x00},
  98         {0x0901, 0x00},
  99         {0x0902, 0x00},
 100         {0x3000, 0x35},
 101         {0x3054, 0x01},
 102         {0x305C, 0x11},
 103
 104         {0x0112, 0x0A},
 105         {0x0113, 0x0A},
 106         {0x034C, 0x10},
 107         {0x034D, 0x00},
 108         {0x034E, 0x09},
 109         {0x034F, 0x00},
 110         {0x0401, 0x00},
 111         {0x0404, 0x00},
 112         {0x0405, 0x10},
 113         {0x0408, 0x00},
 114         {0x0409, 0x00},
 115         {0x040A, 0x00},
 116         {0x040B, 0x00},
 117         {0x040C, 0x10},
 118         {0x040D, 0x00},
 119         {0x040E, 0x09},
 120         {0x040F, 0x00},
 121
 122         {0x0301, 0x05},
 123         {0x0303, 0x02},
 124         {0x0305, 0x03},
 125         {0x0306, 0x00},
 126         {0x0307, 0x96},
 127         {0x0309, 0x0A},
 128         {0x030B, 0x01},
 129         {0x0310, 0x00},
 130
 131         {0x0820, 0x12},
 132         {0x0821, 0xC0},
 133         {0x0822, 0x00},
 134         {0x0823, 0x00},
 135
 136         {0x3A03, 0x09},
 137         {0x3A04, 0x50},
 138         {0x3A05, 0x01},
 139
 140         {0x0B06, 0x01},
 141         {0x30A2, 0x00},
 142
 143         {0x30B4, 0x00},
 144
 145         {0x3A02, 0xFF},
 146
 147         {0x3011, 0x00},
 148         {0x3013, 0x01},
 149
 150         {0x0202, 0x0C},
 151         {0x0203, 0x70},
 152         {0x0224, 0x01},
 153         {0x0225, 0xF4},
 154
 155         {0x0204, 0x00},
 156         {0x0205, 0x00},
 157         {0x020E, 0x01},
 158         {0x020F, 0x00},
 159         {0x0210, 0x01},
 160         {0x0211, 0x00},
 161         {0x0212, 0x01},
 162         {0x0213, 0x00},
 163         {0x0214, 0x01},
 164         {0x0215, 0x00},
 165         {0x0216, 0x00},
 166         {0x0217, 0x00},
 167
 168         {0x4170, 0x00},
 169         {0x4171, 0x10},
 170         {0x4176, 0x00},
 171         {0x4177, 0x3C},
 172         {0xAE20, 0x04},
 173         {0xAE21, 0x5C},
 174
 175         {IMX214_TABLE_WAIT_MS, 10},
 176         {0x0138, 0x01},
 177         {IMX214_TABLE_END, 0x00}
 178 };
 179
 180 static const struct reg_8 mode_1920x1080[] = {
 181         {0x0114, 0x03},
 182         {0x0220, 0x00},
 183         {0x0221, 0x11},
 184         {0x0222, 0x01},
 185         {0x0340, 0x0C},
 186         {0x0341, 0x7A},
 187         {0x0342, 0x13},
 188         {0x0343, 0x90},
 189         {0x0344, 0x04},
 190         {0x0345, 0x78},
 191         {0x0346, 0x03},
 192         {0x0347, 0xFC},
 193         {0x0348, 0x0B},
 194         {0x0349, 0xF7},
 195         {0x034A, 0x08},
 196         {0x034B, 0x33},
 197         {0x0381, 0x01},
 198         {0x0383, 0x01},
 199         {0x0385, 0x01},
 200         {0x0387, 0x01},
 201         {0x0900, 0x00},
 202         {0x0901, 0x00},
 203         {0x0902, 0x00},
 204         {0x3000, 0x35},
 205         {0x3054, 0x01},
 206         {0x305C, 0x11},
 207
 208         {0x0112, 0x0A},
 209         {0x0113, 0x0A},
 210         {0x034C, 0x07},
 211         {0x034D, 0x80},
 212         {0x034E, 0x04},
 213         {0x034F, 0x38},
 214         {0x0401, 0x00},
 215         {0x0404, 0x00},
 216         {0x0405, 0x10},
 217         {0x0408, 0x00},
 218         {0x0409, 0x00},
 219         {0x040A, 0x00},
 220         {0x040B, 0x00},
 221         {0x040C, 0x07},
 222         {0x040D, 0x80},
 223         {0x040E, 0x04},
 224         {0x040F, 0x38},
 225
 226         {0x0301, 0x05},
 227         {0x0303, 0x02},
 228         {0x0305, 0x03},
 229         {0x0306, 0x00},
 230         {0x0307, 0x96},
 231         {0x0309, 0x0A},
 232         {0x030B, 0x01},
 233         {0x0310, 0x00},
 234
 235         {0x0820, 0x12},
 236         {0x0821, 0xC0},
 237         {0x0822, 0x00},
 238         {0x0823, 0x00},
 239
 240         {0x3A03, 0x04},
 241         {0x3A04, 0xF8},
 242         {0x3A05, 0x02},
 243
 244         {0x0B06, 0x01},
 245         {0x30A2, 0x00},
 246
 247         {0x30B4, 0x00},
 248
 249         {0x3A02, 0xFF},
 250
 251         {0x3011, 0x00},
 252         {0x3013, 0x01},
 253
 254         {0x0202, 0x0C},
 255         {0x0203, 0x70},
 256         {0x0224, 0x01},
 257         {0x0225, 0xF4},
 258
 259         {0x0204, 0x00},
 260         {0x0205, 0x00},
 261         {0x020E, 0x01},
 262         {0x020F, 0x00},
 263         {0x0210, 0x01},
 264         {0x0211, 0x00},
 265         {0x0212, 0x01},
 266         {0x0213, 0x00},
 267         {0x0214, 0x01},
 268         {0x0215, 0x00},
 269         {0x0216, 0x00},
 270         {0x0217, 0x00},
 271
 272         {0x4170, 0x00},
 273         {0x4171, 0x10},
 274         {0x4176, 0x00},
 275         {0x4177, 0x3C},
 276         {0xAE20, 0x04},
 277         {0xAE21, 0x5C},
 278
 279         {IMX214_TABLE_WAIT_MS, 10},
 280         {0x0138, 0x01},
 281         {IMX214_TABLE_END, 0x00}
 282 };
 283
 284 static const struct reg_8 mode_table_common[] = {
 285         /* software reset */
 286
 287         /* software standby settings */
 288         {0x0100, 0x00},
 289
 290         /* ATR setting */
 291         {0x9300, 0x02},
 292
 293         /* external clock setting */
 294         {0x0136, 0x18},
 295         {0x0137, 0x00},
 296
 297         /* global setting */
 298         /* basic config */
 299         {0x0101, 0x00},
 300         {0x0105, 0x01},
 301         {0x0106, 0x01},
 302         {0x4550, 0x02},
 303         {0x4601, 0x00},
 304         {0x4642, 0x05},
 305         {0x6227, 0x11},
 306         {0x6276, 0x00},
 307         {0x900E, 0x06},
 308         {0xA802, 0x90},
 309         {0xA803, 0x11},
 310         {0xA804, 0x62},
 311         {0xA805, 0x77},
 312         {0xA806, 0xAE},
 313         {0xA807, 0x34},
 314         {0xA808, 0xAE},
 315         {0xA809, 0x35},
 316         {0xA80A, 0x62},
 317         {0xA80B, 0x83},
 318         {0xAE33, 0x00},
 319
 320         /* analog setting */
 321         {0x4174, 0x00},
 322         {0x4175, 0x11},
 323         {0x4612, 0x29},
 324         {0x461B, 0x12},
 325         {0x461F, 0x06},
 326         {0x4635, 0x07},
 327         {0x4637, 0x30},
 328         {0x463F, 0x18},
 329         {0x4641, 0x0D},
 330         {0x465B, 0x12},
 331         {0x465F, 0x11},
 332         {0x4663, 0x11},
 333         {0x4667, 0x0F},
 334         {0x466F, 0x0F},
 335         {0x470E, 0x09},
 336         {0x4909, 0xAB},
 337         {0x490B, 0x95},
 338         {0x4915, 0x5D},
 339         {0x4A5F, 0xFF},
 340         {0x4A61, 0xFF},
 341         {0x4A73, 0x62},
 342         {0x4A85, 0x00},
 343         {0x4A87, 0xFF},
 344
 345         /* embedded data */
 346         {0x5041, 0x04},
 347         {0x583C, 0x04},
 348         {0x620E, 0x04},
 349         {0x6EB2, 0x01},
 350         {0x6EB3, 0x00},
 351         {0x9300, 0x02},
 352
 353         /* imagequality */
 354         /* HDR setting */
 355         {0x3001, 0x07},
 356         {0x6D12, 0x3F},
 357         {0x6D13, 0xFF},
 358         {0x9344, 0x03},
 359         {0x9706, 0x10},
 360         {0x9707, 0x03},
 361         {0x9708, 0x03},
 362         {0x9E04, 0x01},
 363         {0x9E05, 0x00},
 364         {0x9E0C, 0x01},
 365         {0x9E0D, 0x02},
 366         {0x9E24, 0x00},
 367         {0x9E25, 0x8C},
 368         {0x9E26, 0x00},
 369         {0x9E27, 0x94},
 370         {0x9E28, 0x00},
 371         {0x9E29, 0x96},
 372
 373         /* CNR parameter setting */
 374         {0x69DB, 0x01},
 375
 376         /* Moire reduction */
 377         {0x6957, 0x01},
 378
 379         /* image enhancement */
 380         {0x6987, 0x17},
 381         {0x698A, 0x03},
 382         {0x698B, 0x03},
 383
 384         /* white balanace */
 385         {0x0B8E, 0x01},
 386         {0x0B8F, 0x00},
 387         {0x0B90, 0x01},
 388         {0x0B91, 0x00},
 389         {0x0B92, 0x01},
 390         {0x0B93, 0x00},
 391         {0x0B94, 0x01},
 392         {0x0B95, 0x00},
 393
 394         /* ATR setting */
 395         {0x6E50, 0x00},
 396         {0x6E51, 0x32},
 397         {0x9340, 0x00},
 398         {0x9341, 0x3C},
 399         {0x9342, 0x03},
 400         {0x9343, 0xFF},
 401         {IMX214_TABLE_END, 0x00}
 402 };
 403
 404 /*
 405  * Declare modes in order, from biggest
 406  * to smallest height.
 407  */
 408 static const struct imx214_mode {
 409         u32 width;
 410         u32 height;
 411         const struct reg_8 *reg_table;
 412 } imx214_modes[] = {
 413         {
 414                 .width = 4096,
 415                 .height = 2304,
 416                 .reg_table = mode_4096x2304,
 417         },
 418         {
 419                 .width = 1920,
 420                 .height = 1080,
 421                 .reg_table = mode_1920x1080,
 422         },
 423 };
 424
 425 static inline struct imx214 *to_imx214(struct v4l2_subdev *sd)
 426 {
 427         return container_of(sd, struct imx214, sd);
 428 }
 429
 430 static int __maybe_unused imx214_power_on(struct device *dev)
 431 {
 432         struct i2c_client *client = to_i2c_client(dev);
 433         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 434         struct imx214 *imx214 = to_imx214(sd);
 435         int ret;
 436
 437         ret = regulator_bulk_enable(IMX214_NUM_SUPPLIES, imx214->supplies);
 438         if (ret < 0) {
 439                 dev_err(imx214->dev, "failed to enable regulators: %d\n", ret);
 440                 return ret;
 441         }
 442
 443         usleep_range(2000, 3000);
 444
 445         ret = clk_prepare_enable(imx214->xclk);
 446         if (ret < 0) {
 447                 regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
 448                 dev_err(imx214->dev, "clk prepare enable failed\n");
 449                 return ret;
 450         }
 451
 452         gpiod_set_value_cansleep(imx214->enable_gpio, 1);
 453         usleep_range(12000, 15000);
 454
 455         return 0;
 456 }
 457
 458 static int __maybe_unused imx214_power_off(struct device *dev)
 459 {
 460         struct i2c_client *client = to_i2c_client(dev);
 461         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 462         struct imx214 *imx214 = to_imx214(sd);
 463
 464         gpiod_set_value_cansleep(imx214->enable_gpio, 0);
 465
 466         clk_disable_unprepare(imx214->xclk);
 467
 468         regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
 469         usleep_range(10, 20);
 470
 471         return 0;
 472 }
 473
 474 static int imx214_enum_mbus_code(struct v4l2_subdev *sd,
 475                                  struct v4l2_subdev_state *sd_state,
 476                                  struct v4l2_subdev_mbus_code_enum *code)
 477 {
 478         if (code->index > 0)
 479                 return -EINVAL;
 480
 481         code->code = IMX214_MBUS_CODE;
 482
 483         return 0;
 484 }
 485
 486 static int imx214_enum_frame_size(struct v4l2_subdev *subdev,
 487                                   struct v4l2_subdev_state *sd_state,
 488                                   struct v4l2_subdev_frame_size_enum *fse)
 489 {
 490         if (fse->code != IMX214_MBUS_CODE)
 491                 return -EINVAL;
 492
 493         if (fse->index >= ARRAY_SIZE(imx214_modes))
 494                 return -EINVAL;
 495
 496         fse->min_width = fse->max_width = imx214_modes[fse->index].width;
 497         fse->min_height = fse->max_height = imx214_modes[fse->index].height;
 498
 499         return 0;
 500 }
 501
 502 #ifdef CONFIG_VIDEO_ADV_DEBUG
 503 static int imx214_s_register(struct v4l2_subdev *subdev,
 504                              const struct v4l2_dbg_register *reg)
 505 {
 506         struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
 507
 508         return regmap_write(imx214->regmap, reg->reg, reg->val);
 509 }
 510
 511 static int imx214_g_register(struct v4l2_subdev *subdev,
 512                              struct v4l2_dbg_register *reg)
 513 {
 514         struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
 515         unsigned int aux;
 516         int ret;
 517
 518         reg->size = 1;
 519         ret = regmap_read(imx214->regmap, reg->reg, &aux);
 520         reg->val = aux;
 521
 522         return ret;
 523 }
 524 #endif
 525
 526 static const struct v4l2_subdev_core_ops imx214_core_ops = {
 527 #ifdef CONFIG_VIDEO_ADV_DEBUG
 528         .g_register = imx214_g_register,
 529         .s_register = imx214_s_register,
 530 #endif
 531 };
 532
 533 static struct v4l2_mbus_framefmt *
 534 __imx214_get_pad_format(struct imx214 *imx214,
 535                         struct v4l2_subdev_state *sd_state,
 536                         unsigned int pad,
 537                         enum v4l2_subdev_format_whence which)
 538 {
 539         switch (which) {
 540         case V4L2_SUBDEV_FORMAT_TRY:
 541                 return v4l2_subdev_get_try_format(&imx214->sd, sd_state, pad);
 542         case V4L2_SUBDEV_FORMAT_ACTIVE:
 543                 return &imx214->fmt;
 544         default:
 545                 return NULL;
 546         }
 547 }
 548
 549 static int imx214_get_format(struct v4l2_subdev *sd,
 550                              struct v4l2_subdev_state *sd_state,
 551                              struct v4l2_subdev_format *format)
 552 {
 553         struct imx214 *imx214 = to_imx214(sd);
 554
 555         mutex_lock(&imx214->mutex);
 556         format->format = *__imx214_get_pad_format(imx214, sd_state,
 557                                                   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,
 566                       struct v4l2_subdev_state *sd_state,
 567                       unsigned int pad, enum v4l2_subdev_format_whence which)
 568 {
 569         switch (which) {
 570         case V4L2_SUBDEV_FORMAT_TRY:
 571                 return v4l2_subdev_get_try_crop(&imx214->sd, sd_state, pad);
 572         case V4L2_SUBDEV_FORMAT_ACTIVE:
 573                 return &imx214->crop;
 574         default:
 575                 return NULL;
 576         }
 577 }
 578
 579 static int imx214_set_format(struct v4l2_subdev *sd,
 580                              struct v4l2_subdev_state *sd_state,
 581                              struct v4l2_subdev_format *format)
 582 {
 583         struct imx214 *imx214 = to_imx214(sd);
 584         struct v4l2_mbus_framefmt *__format;
 585         struct v4l2_rect *__crop;
 586         const struct imx214_mode *mode;
 587
 588         mutex_lock(&imx214->mutex);
 589
 590         __crop = __imx214_get_pad_crop(imx214, sd_state, format->pad,
 591                                        format->which);
 592
 593         mode = v4l2_find_nearest_size(imx214_modes,
 594                                       ARRAY_SIZE(imx214_modes), width, height,
 595                                       format->format.width,
 596                                       format->format.height);
 597
 598         __crop->width = mode->width;
 599         __crop->height = mode->height;
 600
 601         __format = __imx214_get_pad_format(imx214, sd_state, format->pad,
 602                                            format->which);
 603         __format->width = __crop->width;
 604         __format->height = __crop->height;
 605         __format->code = IMX214_MBUS_CODE;
 606         __format->field = V4L2_FIELD_NONE;
 607         __format->colorspace = V4L2_COLORSPACE_SRGB;
 608         __format->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(__format->colorspace);
 609         __format->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
 610                                 __format->colorspace, __format->ycbcr_enc);
 611         __format->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(__format->colorspace);
 612
 613         format->format = *__format;
 614
 615         mutex_unlock(&imx214->mutex);
 616
 617         return 0;
 618 }
 619
 620 static int imx214_get_selection(struct v4l2_subdev *sd,
 621                                 struct v4l2_subdev_state *sd_state,
 622                                 struct v4l2_subdev_selection *sel)
 623 {
 624         struct imx214 *imx214 = to_imx214(sd);
 625
 626         if (sel->target != V4L2_SEL_TGT_CROP)
 627                 return -EINVAL;
 628
 629         mutex_lock(&imx214->mutex);
 630         sel->r = *__imx214_get_pad_crop(imx214, sd_state, sel->pad,
 631                                         sel->which);
 632         mutex_unlock(&imx214->mutex);
 633         return 0;
 634 }
 635
 636 static int imx214_entity_init_cfg(struct v4l2_subdev *subdev,
 637                                   struct v4l2_subdev_state *sd_state)
 638 {
 639         struct v4l2_subdev_format fmt = { };
 640
 641         fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 642         fmt.format.width = imx214_modes[0].width;
 643         fmt.format.height = imx214_modes[0].height;
 644
 645         imx214_set_format(subdev, sd_state, &fmt);
 646
 647         return 0;
 648 }
 649
 650 static int imx214_set_ctrl(struct v4l2_ctrl *ctrl)
 651 {
 652         struct imx214 *imx214 = container_of(ctrl->handler,
 653                                              struct imx214, ctrls);
 654         u8 vals[2];
 655         int ret;
 656
 657         /*
 658          * Applying V4L2 control value only happens
 659          * when power is up for streaming
 660          */
 661         if (!pm_runtime_get_if_in_use(imx214->dev))
 662                 return 0;
 663
 664         switch (ctrl->id) {
 665         case V4L2_CID_EXPOSURE:
 666                 vals[1] = ctrl->val;
 667                 vals[0] = ctrl->val >> 8;
 668                 ret = regmap_bulk_write(imx214->regmap, 0x202, vals, 2);
 669                 if (ret < 0)
 670                         dev_err(imx214->dev, "Error %d\n", ret);
 671                 ret = 0;
 672                 break;
 673
 674         default:
 675                 ret = -EINVAL;
 676         }
 677
 678         pm_runtime_put(imx214->dev);
 679
 680         return ret;
 681 }
 682
 683 static const struct v4l2_ctrl_ops imx214_ctrl_ops = {
 684         .s_ctrl = imx214_set_ctrl,
 685 };
 686
 687 #define MAX_CMD 4
 688 static int imx214_write_table(struct imx214 *imx214,
 689                               const struct reg_8 table[])
 690 {
 691         u8 vals[MAX_CMD];
 692         int i;
 693         int ret;
 694
 695         for (; table->addr != IMX214_TABLE_END ; table++) {
 696                 if (table->addr == IMX214_TABLE_WAIT_MS) {
 697                         usleep_range(table->val * 1000,
 698                                      table->val * 1000 + 500);
 699                         continue;
 700                 }
 701
 702                 for (i = 0; i < MAX_CMD; i++) {
 703                         if (table[i].addr != (table[0].addr + i))
 704                                 break;
 705                         vals[i] = table[i].val;
 706                 }
 707
 708                 ret = regmap_bulk_write(imx214->regmap, table->addr, vals, i);
 709
 710                 if (ret) {
 711                         dev_err(imx214->dev, "write_table error: %d\n", ret);
 712                         return ret;
 713                 }
 714
 715                 table += i - 1;
 716         }
 717
 718         return 0;
 719 }
 720
 721 static int imx214_start_streaming(struct imx214 *imx214)
 722 {
 723         const struct imx214_mode *mode;
 724         int ret;
 725
 726         mutex_lock(&imx214->mutex);
 727         ret = imx214_write_table(imx214, mode_table_common);
 728         if (ret < 0) {
 729                 dev_err(imx214->dev, "could not sent common table %d\n", ret);
 730                 goto error;
 731         }
 732
 733         mode = v4l2_find_nearest_size(imx214_modes,
 734                                 ARRAY_SIZE(imx214_modes), width, height,
 735                                 imx214->fmt.width, imx214->fmt.height);
 736         ret = imx214_write_table(imx214, mode->reg_table);
 737         if (ret < 0) {
 738                 dev_err(imx214->dev, "could not sent mode table %d\n", ret);
 739                 goto error;
 740         }
 741         ret = __v4l2_ctrl_handler_setup(&imx214->ctrls);
 742         if (ret < 0) {
 743                 dev_err(imx214->dev, "could not sync v4l2 controls\n");
 744                 goto error;
 745         }
 746         ret = regmap_write(imx214->regmap, 0x100, 1);
 747         if (ret < 0) {
 748                 dev_err(imx214->dev, "could not sent start table %d\n", ret);
 749                 goto error;
 750         }
 751
 752         mutex_unlock(&imx214->mutex);
 753         return 0;
 754
 755 error:
 756         mutex_unlock(&imx214->mutex);
 757         return ret;
 758 }
 759
 760 static int imx214_stop_streaming(struct imx214 *imx214)
 761 {
 762         int ret;
 763
 764         ret = regmap_write(imx214->regmap, 0x100, 0);
 765         if (ret < 0)
 766                 dev_err(imx214->dev, "could not sent stop table %d\n",  ret);
 767
 768         return ret;
 769 }
 770
 771 static int imx214_s_stream(struct v4l2_subdev *subdev, int enable)
 772 {
 773         struct imx214 *imx214 = to_imx214(subdev);
 774         int ret;
 775
 776         if (enable) {
 777                 ret = pm_runtime_resume_and_get(imx214->dev);
 778                 if (ret < 0)
 779                         return ret;
 780
 781                 ret = imx214_start_streaming(imx214);
 782                 if (ret < 0)
 783                         goto err_rpm_put;
 784         } else {
 785                 ret = imx214_stop_streaming(imx214);
 786                 if (ret < 0)
 787                         goto err_rpm_put;
 788                 pm_runtime_put(imx214->dev);
 789         }
 790
 791         return 0;
 792
 793 err_rpm_put:
 794         pm_runtime_put(imx214->dev);
 795         return ret;
 796 }
 797
 798 static int imx214_g_frame_interval(struct v4l2_subdev *subdev,
 799                                    struct v4l2_subdev_frame_interval *fival)
 800 {
 801         fival->interval.numerator = 1;
 802         fival->interval.denominator = IMX214_FPS;
 803
 804         return 0;
 805 }
 806
 807 static int imx214_enum_frame_interval(struct v4l2_subdev *subdev,
 808                                 struct v4l2_subdev_state *sd_state,
 809                                 struct v4l2_subdev_frame_interval_enum *fie)
 810 {
 811         const struct imx214_mode *mode;
 812
 813         if (fie->index != 0)
 814                 return -EINVAL;
 815
 816         mode = v4l2_find_nearest_size(imx214_modes,
 817                                 ARRAY_SIZE(imx214_modes), width, height,
 818                                 fie->width, fie->height);
 819
 820         fie->code = IMX214_MBUS_CODE;
 821         fie->width = mode->width;
 822         fie->height = mode->height;
 823         fie->interval.numerator = 1;
 824         fie->interval.denominator = IMX214_FPS;
 825
 826         return 0;
 827 }
 828
 829 static const struct v4l2_subdev_video_ops imx214_video_ops = {
 830         .s_stream = imx214_s_stream,
 831         .g_frame_interval = imx214_g_frame_interval,
 832         .s_frame_interval = imx214_g_frame_interval,
 833 };
 834
 835 static const struct v4l2_subdev_pad_ops imx214_subdev_pad_ops = {
 836         .enum_mbus_code = imx214_enum_mbus_code,
 837         .enum_frame_size = imx214_enum_frame_size,
 838         .enum_frame_interval = imx214_enum_frame_interval,
 839         .get_fmt = imx214_get_format,
 840         .set_fmt = imx214_set_format,
 841         .get_selection = imx214_get_selection,
 842         .init_cfg = imx214_entity_init_cfg,
 843 };
 844
 845 static const struct v4l2_subdev_ops imx214_subdev_ops = {
 846         .core = &imx214_core_ops,
 847         .video = &imx214_video_ops,
 848         .pad = &imx214_subdev_pad_ops,
 849 };
 850
 851 static const struct regmap_config sensor_regmap_config = {
 852         .reg_bits = 16,
 853         .val_bits = 8,
 854         .cache_type = REGCACHE_RBTREE,
 855 };
 856
 857 static int imx214_get_regulators(struct device *dev, struct imx214 *imx214)
 858 {
 859         unsigned int i;
 860
 861         for (i = 0; i < IMX214_NUM_SUPPLIES; i++)
 862                 imx214->supplies[i].supply = imx214_supply_name[i];
 863
 864         return devm_regulator_bulk_get(dev, IMX214_NUM_SUPPLIES,
 865                                        imx214->supplies);
 866 }
 867
 868 static int imx214_parse_fwnode(struct device *dev)
 869 {
 870         struct fwnode_handle *endpoint;
 871         struct v4l2_fwnode_endpoint bus_cfg = {
 872                 .bus_type = V4L2_MBUS_CSI2_DPHY,
 873         };
 874         unsigned int i;
 875         int ret;
 876
 877         endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
 878         if (!endpoint) {
 879                 dev_err(dev, "endpoint node not found\n");
 880                 return -EINVAL;
 881         }
 882
 883         ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
 884         if (ret) {
 885                 dev_err(dev, "parsing endpoint node failed\n");
 886                 goto done;
 887         }
 888
 889         for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
 890                 if (bus_cfg.link_frequencies[i] == IMX214_DEFAULT_LINK_FREQ)
 891                         break;
 892
 893         if (i == bus_cfg.nr_of_link_frequencies) {
 894                 dev_err(dev, "link-frequencies %d not supported, Please review your DT\n",
 895                         IMX214_DEFAULT_LINK_FREQ);
 896                 ret = -EINVAL;
 897                 goto done;
 898         }
 899
 900 done:
 901         v4l2_fwnode_endpoint_free(&bus_cfg);
 902         fwnode_handle_put(endpoint);
 903         return ret;
 904 }
 905
 906 static int imx214_probe(struct i2c_client *client)
 907 {
 908         struct device *dev = &client->dev;
 909         struct imx214 *imx214;
 910         static const s64 link_freq[] = {
 911                 IMX214_DEFAULT_LINK_FREQ,
 912         };
 913         static const struct v4l2_area unit_size = {
 914                 .width = 1120,
 915                 .height = 1120,
 916         };
 917         int ret;
 918
 919         ret = imx214_parse_fwnode(dev);
 920         if (ret)
 921                 return ret;
 922
 923         imx214 = devm_kzalloc(dev, sizeof(*imx214), GFP_KERNEL);
 924         if (!imx214)
 925                 return -ENOMEM;
 926
 927         imx214->dev = dev;
 928
 929         imx214->xclk = devm_clk_get(dev, NULL);
 930         if (IS_ERR(imx214->xclk)) {
 931                 dev_err(dev, "could not get xclk");
 932                 return PTR_ERR(imx214->xclk);
 933         }
 934
 935         ret = clk_set_rate(imx214->xclk, IMX214_DEFAULT_CLK_FREQ);
 936         if (ret) {
 937                 dev_err(dev, "could not set xclk frequency\n");
 938                 return ret;
 939         }
 940
 941         ret = imx214_get_regulators(dev, imx214);
 942         if (ret < 0) {
 943                 dev_err(dev, "cannot get regulators\n");
 944                 return ret;
 945         }
 946
 947         imx214->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
 948         if (IS_ERR(imx214->enable_gpio)) {
 949                 dev_err(dev, "cannot get enable gpio\n");
 950                 return PTR_ERR(imx214->enable_gpio);
 951         }
 952
 953         imx214->regmap = devm_regmap_init_i2c(client, &sensor_regmap_config);
 954         if (IS_ERR(imx214->regmap)) {
 955                 dev_err(dev, "regmap init failed\n");
 956                 return PTR_ERR(imx214->regmap);
 957         }
 958
 959         v4l2_i2c_subdev_init(&imx214->sd, client, &imx214_subdev_ops);
 960
 961         /*
 962          * Enable power initially, to avoid warnings
 963          * from clk_disable on power_off
 964          */
 965         imx214_power_on(imx214->dev);
 966
 967         pm_runtime_set_active(imx214->dev);
 968         pm_runtime_enable(imx214->dev);
 969         pm_runtime_idle(imx214->dev);
 970
 971         v4l2_ctrl_handler_init(&imx214->ctrls, 3);
 972
 973         imx214->pixel_rate = v4l2_ctrl_new_std(&imx214->ctrls, NULL,
 974                                                V4L2_CID_PIXEL_RATE, 0,
 975                                                IMX214_DEFAULT_PIXEL_RATE, 1,
 976                                                IMX214_DEFAULT_PIXEL_RATE);
 977         imx214->link_freq = v4l2_ctrl_new_int_menu(&imx214->ctrls, NULL,
 978                                                    V4L2_CID_LINK_FREQ,
 979                                                    ARRAY_SIZE(link_freq) - 1,
 980                                                    0, link_freq);
 981         if (imx214->link_freq)
 982                 imx214->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
 983
 984         /*
 985          * WARNING!
 986          * Values obtained reverse engineering blobs and/or devices.
 987          * Ranges and functionality might be wrong.
 988          *
 989          * Sony, please release some register set documentation for the
 990          * device.
 991          *
 992          * Yours sincerely, Ricardo.
 993          */
 994         imx214->exposure = v4l2_ctrl_new_std(&imx214->ctrls, &imx214_ctrl_ops,
 995                                              V4L2_CID_EXPOSURE,
 996                                              0, 3184, 1, 0x0c70);
 997
 998         imx214->unit_size = v4l2_ctrl_new_std_compound(&imx214->ctrls,
 999                                 NULL,
1000                                 V4L2_CID_UNIT_CELL_SIZE,
1001                                 v4l2_ctrl_ptr_create((void *)&unit_size));
1002         ret = imx214->ctrls.error;
1003         if (ret) {
1004                 dev_err(&client->dev, "%s control init failed (%d)\n",
1005                         __func__, ret);
1006                 goto free_ctrl;
1007         }
1008
1009         imx214->sd.ctrl_handler = &imx214->ctrls;
1010         mutex_init(&imx214->mutex);
1011         imx214->ctrls.lock = &imx214->mutex;
1012
1013         imx214->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1014         imx214->pad.flags = MEDIA_PAD_FL_SOURCE;
1015         imx214->sd.dev = &client->dev;
1016         imx214->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1017
1018         ret = media_entity_pads_init(&imx214->sd.entity, 1, &imx214->pad);
1019         if (ret < 0) {
1020                 dev_err(dev, "could not register media entity\n");
1021                 goto free_ctrl;
1022         }
1023
1024         imx214_entity_init_cfg(&imx214->sd, NULL);
1025
1026         ret = v4l2_async_register_subdev_sensor(&imx214->sd);
1027         if (ret < 0) {
1028                 dev_err(dev, "could not register v4l2 device\n");
1029                 goto free_entity;
1030         }
1031
1032         return 0;
1033
1034 free_entity:
1035         media_entity_cleanup(&imx214->sd.entity);
1036 free_ctrl:
1037         mutex_destroy(&imx214->mutex);
1038         v4l2_ctrl_handler_free(&imx214->ctrls);
1039         pm_runtime_disable(imx214->dev);
1040
1041         return ret;
1042 }
1043
1044 static void imx214_remove(struct i2c_client *client)
1045 {
1046         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1047         struct imx214 *imx214 = to_imx214(sd);
1048
1049         v4l2_async_unregister_subdev(&imx214->sd);
1050         media_entity_cleanup(&imx214->sd.entity);
1051         v4l2_ctrl_handler_free(&imx214->ctrls);
1052
1053         pm_runtime_disable(&client->dev);
1054         pm_runtime_set_suspended(&client->dev);
1055
1056         mutex_destroy(&imx214->mutex);
1057 }
1058
1059 static const struct of_device_id imx214_of_match[] = {
1060         { .compatible = "sony,imx214" },
1061         { }
1062 };
1063 MODULE_DEVICE_TABLE(of, imx214_of_match);
1064
1065 static const struct dev_pm_ops imx214_pm_ops = {
1066         SET_RUNTIME_PM_OPS(imx214_power_off, imx214_power_on, NULL)
1067 };
1068
1069 static struct i2c_driver imx214_i2c_driver = {
1070         .driver = {
1071                 .of_match_table = imx214_of_match,
1072                 .pm = &imx214_pm_ops,
1073                 .name  = "imx214",
1074         },
1075         .probe = imx214_probe,
1076         .remove = imx214_remove,
1077 };
1078
1079 module_i2c_driver(imx214_i2c_driver);
1080
1081 MODULE_DESCRIPTION("Sony IMX214 Camera driver");
1082 MODULE_AUTHOR("Ricardo Ribalda <ribalda@kernel.org>");
1083 MODULE_LICENSE("GPL v2");