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         bool streaming;
  63 };
  64
  65 struct reg_8 {
  66         u16 addr;
  67         u8 val;
  68 };
  69
  70 enum {
  71         IMX214_TABLE_WAIT_MS = 0,
  72         IMX214_TABLE_END,
  73         IMX214_MAX_RETRIES,
  74         IMX214_WAIT_MS
  75 };
  76
  77 /*From imx214_mode_tbls.h*/
  78 static const struct reg_8 mode_4096x2304[] = {
  79         {0x0114, 0x03},
  80         {0x0220, 0x00},
  81         {0x0221, 0x11},
  82         {0x0222, 0x01},
  83         {0x0340, 0x0C},
  84         {0x0341, 0x7A},
  85         {0x0342, 0x13},
  86         {0x0343, 0x90},
  87         {0x0344, 0x00},
  88         {0x0345, 0x38},
  89         {0x0346, 0x01},
  90         {0x0347, 0x98},
  91         {0x0348, 0x10},
  92         {0x0349, 0x37},
  93         {0x034A, 0x0A},
  94         {0x034B, 0x97},
  95         {0x0381, 0x01},
  96         {0x0383, 0x01},
  97         {0x0385, 0x01},
  98         {0x0387, 0x01},
  99         {0x0900, 0x00},
 100         {0x0901, 0x00},
 101         {0x0902, 0x00},
 102         {0x3000, 0x35},
 103         {0x3054, 0x01},
 104         {0x305C, 0x11},
 105
 106         {0x0112, 0x0A},
 107         {0x0113, 0x0A},
 108         {0x034C, 0x10},
 109         {0x034D, 0x00},
 110         {0x034E, 0x09},
 111         {0x034F, 0x00},
 112         {0x0401, 0x00},
 113         {0x0404, 0x00},
 114         {0x0405, 0x10},
 115         {0x0408, 0x00},
 116         {0x0409, 0x00},
 117         {0x040A, 0x00},
 118         {0x040B, 0x00},
 119         {0x040C, 0x10},
 120         {0x040D, 0x00},
 121         {0x040E, 0x09},
 122         {0x040F, 0x00},
 123
 124         {0x0301, 0x05},
 125         {0x0303, 0x02},
 126         {0x0305, 0x03},
 127         {0x0306, 0x00},
 128         {0x0307, 0x96},
 129         {0x0309, 0x0A},
 130         {0x030B, 0x01},
 131         {0x0310, 0x00},
 132
 133         {0x0820, 0x12},
 134         {0x0821, 0xC0},
 135         {0x0822, 0x00},
 136         {0x0823, 0x00},
 137
 138         {0x3A03, 0x09},
 139         {0x3A04, 0x50},
 140         {0x3A05, 0x01},
 141
 142         {0x0B06, 0x01},
 143         {0x30A2, 0x00},
 144
 145         {0x30B4, 0x00},
 146
 147         {0x3A02, 0xFF},
 148
 149         {0x3011, 0x00},
 150         {0x3013, 0x01},
 151
 152         {0x0202, 0x0C},
 153         {0x0203, 0x70},
 154         {0x0224, 0x01},
 155         {0x0225, 0xF4},
 156
 157         {0x0204, 0x00},
 158         {0x0205, 0x00},
 159         {0x020E, 0x01},
 160         {0x020F, 0x00},
 161         {0x0210, 0x01},
 162         {0x0211, 0x00},
 163         {0x0212, 0x01},
 164         {0x0213, 0x00},
 165         {0x0214, 0x01},
 166         {0x0215, 0x00},
 167         {0x0216, 0x00},
 168         {0x0217, 0x00},
 169
 170         {0x4170, 0x00},
 171         {0x4171, 0x10},
 172         {0x4176, 0x00},
 173         {0x4177, 0x3C},
 174         {0xAE20, 0x04},
 175         {0xAE21, 0x5C},
 176
 177         {IMX214_TABLE_WAIT_MS, 10},
 178         {0x0138, 0x01},
 179         {IMX214_TABLE_END, 0x00}
 180 };
 181
 182 static const struct reg_8 mode_1920x1080[] = {
 183         {0x0114, 0x03},
 184         {0x0220, 0x00},
 185         {0x0221, 0x11},
 186         {0x0222, 0x01},
 187         {0x0340, 0x0C},
 188         {0x0341, 0x7A},
 189         {0x0342, 0x13},
 190         {0x0343, 0x90},
 191         {0x0344, 0x04},
 192         {0x0345, 0x78},
 193         {0x0346, 0x03},
 194         {0x0347, 0xFC},
 195         {0x0348, 0x0B},
 196         {0x0349, 0xF7},
 197         {0x034A, 0x08},
 198         {0x034B, 0x33},
 199         {0x0381, 0x01},
 200         {0x0383, 0x01},
 201         {0x0385, 0x01},
 202         {0x0387, 0x01},
 203         {0x0900, 0x00},
 204         {0x0901, 0x00},
 205         {0x0902, 0x00},
 206         {0x3000, 0x35},
 207         {0x3054, 0x01},
 208         {0x305C, 0x11},
 209
 210         {0x0112, 0x0A},
 211         {0x0113, 0x0A},
 212         {0x034C, 0x07},
 213         {0x034D, 0x80},
 214         {0x034E, 0x04},
 215         {0x034F, 0x38},
 216         {0x0401, 0x00},
 217         {0x0404, 0x00},
 218         {0x0405, 0x10},
 219         {0x0408, 0x00},
 220         {0x0409, 0x00},
 221         {0x040A, 0x00},
 222         {0x040B, 0x00},
 223         {0x040C, 0x07},
 224         {0x040D, 0x80},
 225         {0x040E, 0x04},
 226         {0x040F, 0x38},
 227
 228         {0x0301, 0x05},
 229         {0x0303, 0x02},
 230         {0x0305, 0x03},
 231         {0x0306, 0x00},
 232         {0x0307, 0x96},
 233         {0x0309, 0x0A},
 234         {0x030B, 0x01},
 235         {0x0310, 0x00},
 236
 237         {0x0820, 0x12},
 238         {0x0821, 0xC0},
 239         {0x0822, 0x00},
 240         {0x0823, 0x00},
 241
 242         {0x3A03, 0x04},
 243         {0x3A04, 0xF8},
 244         {0x3A05, 0x02},
 245
 246         {0x0B06, 0x01},
 247         {0x30A2, 0x00},
 248
 249         {0x30B4, 0x00},
 250
 251         {0x3A02, 0xFF},
 252
 253         {0x3011, 0x00},
 254         {0x3013, 0x01},
 255
 256         {0x0202, 0x0C},
 257         {0x0203, 0x70},
 258         {0x0224, 0x01},
 259         {0x0225, 0xF4},
 260
 261         {0x0204, 0x00},
 262         {0x0205, 0x00},
 263         {0x020E, 0x01},
 264         {0x020F, 0x00},
 265         {0x0210, 0x01},
 266         {0x0211, 0x00},
 267         {0x0212, 0x01},
 268         {0x0213, 0x00},
 269         {0x0214, 0x01},
 270         {0x0215, 0x00},
 271         {0x0216, 0x00},
 272         {0x0217, 0x00},
 273
 274         {0x4170, 0x00},
 275         {0x4171, 0x10},
 276         {0x4176, 0x00},
 277         {0x4177, 0x3C},
 278         {0xAE20, 0x04},
 279         {0xAE21, 0x5C},
 280
 281         {IMX214_TABLE_WAIT_MS, 10},
 282         {0x0138, 0x01},
 283         {IMX214_TABLE_END, 0x00}
 284 };
 285
 286 static const struct reg_8 mode_table_common[] = {
 287         /* software reset */
 288
 289         /* software standby settings */
 290         {0x0100, 0x00},
 291
 292         /* ATR setting */
 293         {0x9300, 0x02},
 294
 295         /* external clock setting */
 296         {0x0136, 0x18},
 297         {0x0137, 0x00},
 298
 299         /* global setting */
 300         /* basic config */
 301         {0x0101, 0x00},
 302         {0x0105, 0x01},
 303         {0x0106, 0x01},
 304         {0x4550, 0x02},
 305         {0x4601, 0x00},
 306         {0x4642, 0x05},
 307         {0x6227, 0x11},
 308         {0x6276, 0x00},
 309         {0x900E, 0x06},
 310         {0xA802, 0x90},
 311         {0xA803, 0x11},
 312         {0xA804, 0x62},
 313         {0xA805, 0x77},
 314         {0xA806, 0xAE},
 315         {0xA807, 0x34},
 316         {0xA808, 0xAE},
 317         {0xA809, 0x35},
 318         {0xA80A, 0x62},
 319         {0xA80B, 0x83},
 320         {0xAE33, 0x00},
 321
 322         /* analog setting */
 323         {0x4174, 0x00},
 324         {0x4175, 0x11},
 325         {0x4612, 0x29},
 326         {0x461B, 0x12},
 327         {0x461F, 0x06},
 328         {0x4635, 0x07},
 329         {0x4637, 0x30},
 330         {0x463F, 0x18},
 331         {0x4641, 0x0D},
 332         {0x465B, 0x12},
 333         {0x465F, 0x11},
 334         {0x4663, 0x11},
 335         {0x4667, 0x0F},
 336         {0x466F, 0x0F},
 337         {0x470E, 0x09},
 338         {0x4909, 0xAB},
 339         {0x490B, 0x95},
 340         {0x4915, 0x5D},
 341         {0x4A5F, 0xFF},
 342         {0x4A61, 0xFF},
 343         {0x4A73, 0x62},
 344         {0x4A85, 0x00},
 345         {0x4A87, 0xFF},
 346
 347         /* embedded data */
 348         {0x5041, 0x04},
 349         {0x583C, 0x04},
 350         {0x620E, 0x04},
 351         {0x6EB2, 0x01},
 352         {0x6EB3, 0x00},
 353         {0x9300, 0x02},
 354
 355         /* imagequality */
 356         /* HDR setting */
 357         {0x3001, 0x07},
 358         {0x6D12, 0x3F},
 359         {0x6D13, 0xFF},
 360         {0x9344, 0x03},
 361         {0x9706, 0x10},
 362         {0x9707, 0x03},
 363         {0x9708, 0x03},
 364         {0x9E04, 0x01},
 365         {0x9E05, 0x00},
 366         {0x9E0C, 0x01},
 367         {0x9E0D, 0x02},
 368         {0x9E24, 0x00},
 369         {0x9E25, 0x8C},
 370         {0x9E26, 0x00},
 371         {0x9E27, 0x94},
 372         {0x9E28, 0x00},
 373         {0x9E29, 0x96},
 374
 375         /* CNR parameter setting */
 376         {0x69DB, 0x01},
 377
 378         /* Moire reduction */
 379         {0x6957, 0x01},
 380
 381         /* image enhancement */
 382         {0x6987, 0x17},
 383         {0x698A, 0x03},
 384         {0x698B, 0x03},
 385
 386         /* white balanace */
 387         {0x0B8E, 0x01},
 388         {0x0B8F, 0x00},
 389         {0x0B90, 0x01},
 390         {0x0B91, 0x00},
 391         {0x0B92, 0x01},
 392         {0x0B93, 0x00},
 393         {0x0B94, 0x01},
 394         {0x0B95, 0x00},
 395
 396         /* ATR setting */
 397         {0x6E50, 0x00},
 398         {0x6E51, 0x32},
 399         {0x9340, 0x00},
 400         {0x9341, 0x3C},
 401         {0x9342, 0x03},
 402         {0x9343, 0xFF},
 403         {IMX214_TABLE_END, 0x00}
 404 };
 405
 406 /*
 407  * Declare modes in order, from biggest
 408  * to smallest height.
 409  */
 410 static const struct imx214_mode {
 411         u32 width;
 412         u32 height;
 413         const struct reg_8 *reg_table;
 414 } imx214_modes[] = {
 415         {
 416                 .width = 4096,
 417                 .height = 2304,
 418                 .reg_table = mode_4096x2304,
 419         },
 420         {
 421                 .width = 1920,
 422                 .height = 1080,
 423                 .reg_table = mode_1920x1080,
 424         },
 425 };
 426
 427 static inline struct imx214 *to_imx214(struct v4l2_subdev *sd)
 428 {
 429         return container_of(sd, struct imx214, sd);
 430 }
 431
 432 static int __maybe_unused imx214_power_on(struct device *dev)
 433 {
 434         struct i2c_client *client = to_i2c_client(dev);
 435         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 436         struct imx214 *imx214 = to_imx214(sd);
 437         int ret;
 438
 439         ret = regulator_bulk_enable(IMX214_NUM_SUPPLIES, imx214->supplies);
 440         if (ret < 0) {
 441                 dev_err(imx214->dev, "failed to enable regulators: %d\n", ret);
 442                 return ret;
 443         }
 444
 445         usleep_range(2000, 3000);
 446
 447         ret = clk_prepare_enable(imx214->xclk);
 448         if (ret < 0) {
 449                 regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
 450                 dev_err(imx214->dev, "clk prepare enable failed\n");
 451                 return ret;
 452         }
 453
 454         gpiod_set_value_cansleep(imx214->enable_gpio, 1);
 455         usleep_range(12000, 15000);
 456
 457         return 0;
 458 }
 459
 460 static int __maybe_unused imx214_power_off(struct device *dev)
 461 {
 462         struct i2c_client *client = to_i2c_client(dev);
 463         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 464         struct imx214 *imx214 = to_imx214(sd);
 465
 466         gpiod_set_value_cansleep(imx214->enable_gpio, 0);
 467
 468         clk_disable_unprepare(imx214->xclk);
 469
 470         regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
 471         usleep_range(10, 20);
 472
 473         return 0;
 474 }
 475
 476 static int imx214_enum_mbus_code(struct v4l2_subdev *sd,
 477                                  struct v4l2_subdev_pad_config *cfg,
 478                                  struct v4l2_subdev_mbus_code_enum *code)
 479 {
 480         if (code->index > 0)
 481                 return -EINVAL;
 482
 483         code->code = IMX214_MBUS_CODE;
 484
 485         return 0;
 486 }
 487
 488 static int imx214_enum_frame_size(struct v4l2_subdev *subdev,
 489                                   struct v4l2_subdev_pad_config *cfg,
 490                                   struct v4l2_subdev_frame_size_enum *fse)
 491 {
 492         if (fse->code != IMX214_MBUS_CODE)
 493                 return -EINVAL;
 494
 495         if (fse->index >= ARRAY_SIZE(imx214_modes))
 496                 return -EINVAL;
 497
 498         fse->min_width = fse->max_width = imx214_modes[fse->index].width;
 499         fse->min_height = fse->max_height = imx214_modes[fse->index].height;
 500
 501         return 0;
 502 }
 503
 504 #ifdef CONFIG_VIDEO_ADV_DEBUG
 505 static int imx214_s_register(struct v4l2_subdev *subdev,
 506                              const struct v4l2_dbg_register *reg)
 507 {
 508         struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
 509
 510         return regmap_write(imx214->regmap, reg->reg, reg->val);
 511 }
 512
 513 static int imx214_g_register(struct v4l2_subdev *subdev,
 514                              struct v4l2_dbg_register *reg)
 515 {
 516         struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
 517         unsigned int aux;
 518         int ret;
 519
 520         reg->size = 1;
 521         ret = regmap_read(imx214->regmap, reg->reg, &aux);
 522         reg->val = aux;
 523
 524         return ret;
 525 }
 526 #endif
 527
 528 static const struct v4l2_subdev_core_ops imx214_core_ops = {
 529 #ifdef CONFIG_VIDEO_ADV_DEBUG
 530         .g_register = imx214_g_register,
 531         .s_register = imx214_s_register,
 532 #endif
 533 };
 534
 535 static struct v4l2_mbus_framefmt *
 536 __imx214_get_pad_format(struct imx214 *imx214,
 537                         struct v4l2_subdev_pad_config *cfg,
 538                         unsigned int pad,
 539                         enum v4l2_subdev_format_whence which)
 540 {
 541         switch (which) {
 542         case V4L2_SUBDEV_FORMAT_TRY:
 543                 return v4l2_subdev_get_try_format(&imx214->sd, cfg, pad);
 544         case V4L2_SUBDEV_FORMAT_ACTIVE:
 545                 return &imx214->fmt;
 546         default:
 547                 return NULL;
 548         }
 549 }
 550
 551 static int imx214_get_format(struct v4l2_subdev *sd,
 552                              struct v4l2_subdev_pad_config *cfg,
 553                              struct v4l2_subdev_format *format)
 554 {
 555         struct imx214 *imx214 = to_imx214(sd);
 556
 557         mutex_lock(&imx214->mutex);
 558         format->format = *__imx214_get_pad_format(imx214, cfg, format->pad,
 559                                                   format->which);
 560         mutex_unlock(&imx214->mutex);
 561
 562         return 0;
 563 }
 564
 565 static struct v4l2_rect *
 566 __imx214_get_pad_crop(struct imx214 *imx214, struct v4l2_subdev_pad_config *cfg,
 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, cfg, 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_pad_config *cfg,
 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, cfg, format->pad, format->which);
 591
 592         mode = v4l2_find_nearest_size(imx214_modes,
 593                                       ARRAY_SIZE(imx214_modes), width, height,
 594                                       format->format.width,
 595                                       format->format.height);
 596
 597         __crop->width = mode->width;
 598         __crop->height = mode->height;
 599
 600         __format = __imx214_get_pad_format(imx214, cfg, format->pad,
 601                                            format->which);
 602         __format->width = __crop->width;
 603         __format->height = __crop->height;
 604         __format->code = IMX214_MBUS_CODE;
 605         __format->field = V4L2_FIELD_NONE;
 606         __format->colorspace = V4L2_COLORSPACE_SRGB;
 607         __format->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(__format->colorspace);
 608         __format->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
 609                                 __format->colorspace, __format->ycbcr_enc);
 610         __format->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(__format->colorspace);
 611
 612         format->format = *__format;
 613
 614         mutex_unlock(&imx214->mutex);
 615
 616         return 0;
 617 }
 618
 619 static int imx214_get_selection(struct v4l2_subdev *sd,
 620                                 struct v4l2_subdev_pad_config *cfg,
 621                                 struct v4l2_subdev_selection *sel)
 622 {
 623         struct imx214 *imx214 = to_imx214(sd);
 624
 625         if (sel->target != V4L2_SEL_TGT_CROP)
 626                 return -EINVAL;
 627
 628         mutex_lock(&imx214->mutex);
 629         sel->r = *__imx214_get_pad_crop(imx214, cfg, sel->pad,
 630                                         sel->which);
 631         mutex_unlock(&imx214->mutex);
 632         return 0;
 633 }
 634
 635 static int imx214_entity_init_cfg(struct v4l2_subdev *subdev,
 636                                   struct v4l2_subdev_pad_config *cfg)
 637 {
 638         struct v4l2_subdev_format fmt = { };
 639
 640         fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 641         fmt.format.width = imx214_modes[0].width;
 642         fmt.format.height = imx214_modes[0].height;
 643
 644         imx214_set_format(subdev, cfg, &fmt);
 645
 646         return 0;
 647 }
 648
 649 static int imx214_set_ctrl(struct v4l2_ctrl *ctrl)
 650 {
 651         struct imx214 *imx214 = container_of(ctrl->handler,
 652                                              struct imx214, ctrls);
 653         u8 vals[2];
 654         int ret;
 655
 656         /*
 657          * Applying V4L2 control value only happens
 658          * when power is up for streaming
 659          */
 660         if (!pm_runtime_get_if_in_use(imx214->dev))
 661                 return 0;
 662
 663         switch (ctrl->id) {
 664         case V4L2_CID_EXPOSURE:
 665                 vals[1] = ctrl->val;
 666                 vals[0] = ctrl->val >> 8;
 667                 ret = regmap_bulk_write(imx214->regmap, 0x202, vals, 2);
 668                 if (ret < 0)
 669                         dev_err(imx214->dev, "Error %d\n", ret);
 670                 ret = 0;
 671                 break;
 672
 673         default:
 674                 ret = -EINVAL;
 675         }
 676
 677         pm_runtime_put(imx214->dev);
 678
 679         return ret;
 680 }
 681
 682 static const struct v4l2_ctrl_ops imx214_ctrl_ops = {
 683         .s_ctrl = imx214_set_ctrl,
 684 };
 685
 686 #define MAX_CMD 4
 687 static int imx214_write_table(struct imx214 *imx214,
 688                               const struct reg_8 table[])
 689 {
 690         u8 vals[MAX_CMD];
 691         int i;
 692         int ret;
 693
 694         for (; table->addr != IMX214_TABLE_END ; table++) {
 695                 if (table->addr == IMX214_TABLE_WAIT_MS) {
 696                         usleep_range(table->val * 1000,
 697                                      table->val * 1000 + 500);
 698                         continue;
 699                 }
 700
 701                 for (i = 0; i < MAX_CMD; i++) {
 702                         if (table[i].addr != (table[0].addr + i))
 703                                 break;
 704                         vals[i] = table[i].val;
 705                 }
 706
 707                 ret = regmap_bulk_write(imx214->regmap, table->addr, vals, i);
 708
 709                 if (ret) {
 710                         dev_err(imx214->dev, "write_table error: %d\n", ret);
 711                         return ret;
 712                 }
 713
 714                 table += i - 1;
 715         }
 716
 717         return 0;
 718 }
 719
 720 static int imx214_start_streaming(struct imx214 *imx214)
 721 {
 722         const struct imx214_mode *mode;
 723         int ret;
 724
 725         mutex_lock(&imx214->mutex);
 726         ret = imx214_write_table(imx214, mode_table_common);
 727         if (ret < 0) {
 728                 dev_err(imx214->dev, "could not sent common table %d\n", ret);
 729                 goto error;
 730         }
 731
 732         mode = v4l2_find_nearest_size(imx214_modes,
 733                                 ARRAY_SIZE(imx214_modes), width, height,
 734                                 imx214->fmt.width, imx214->fmt.height);
 735         ret = imx214_write_table(imx214, mode->reg_table);
 736         if (ret < 0) {
 737                 dev_err(imx214->dev, "could not sent mode table %d\n", ret);
 738                 goto error;
 739         }
 740         ret = __v4l2_ctrl_handler_setup(&imx214->ctrls);
 741         if (ret < 0) {
 742                 dev_err(imx214->dev, "could not sync v4l2 controls\n");
 743                 goto error;
 744         }
 745         ret = regmap_write(imx214->regmap, 0x100, 1);
 746         if (ret < 0) {
 747                 dev_err(imx214->dev, "could not sent start table %d\n", ret);
 748                 goto error;
 749         }
 750
 751         mutex_unlock(&imx214->mutex);
 752         return 0;
 753
 754 error:
 755         mutex_unlock(&imx214->mutex);
 756         return ret;
 757 }
 758
 759 static int imx214_stop_streaming(struct imx214 *imx214)
 760 {
 761         int ret;
 762
 763         ret = regmap_write(imx214->regmap, 0x100, 0);
 764         if (ret < 0)
 765                 dev_err(imx214->dev, "could not sent stop table %d\n",  ret);
 766
 767         return ret;
 768 }
 769
 770 static int imx214_s_stream(struct v4l2_subdev *subdev, int enable)
 771 {
 772         struct imx214 *imx214 = to_imx214(subdev);
 773         int ret;
 774
 775         if (imx214->streaming == enable)
 776                 return 0;
 777
 778         if (enable) {
 779                 ret = pm_runtime_get_sync(imx214->dev);
 780                 if (ret < 0) {
 781                         pm_runtime_put_noidle(imx214->dev);
 782                         return ret;
 783                 }
 784
 785                 ret = imx214_start_streaming(imx214);
 786                 if (ret < 0)
 787                         goto err_rpm_put;
 788         } else {
 789                 ret = imx214_start_streaming(imx214);
 790                 if (ret < 0)
 791                         goto err_rpm_put;
 792                 pm_runtime_put(imx214->dev);
 793         }
 794
 795         imx214->streaming = enable;
 796         return 0;
 797
 798 err_rpm_put:
 799         pm_runtime_put(imx214->dev);
 800         return ret;
 801 }
 802
 803 static int imx214_g_frame_interval(struct v4l2_subdev *subdev,
 804                                    struct v4l2_subdev_frame_interval *fival)
 805 {
 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         static const struct v4l2_area unit_size = {
 952                 .width = 1120,
 953                 .height = 1120,
 954         };
 955         int ret;
 956
 957         ret = imx214_parse_fwnode(dev);
 958         if (ret)
 959                 return ret;
 960
 961         imx214 = devm_kzalloc(dev, sizeof(*imx214), GFP_KERNEL);
 962         if (!imx214)
 963                 return -ENOMEM;
 964
 965         imx214->dev = dev;
 966
 967         imx214->xclk = devm_clk_get(dev, NULL);
 968         if (IS_ERR(imx214->xclk)) {
 969                 dev_err(dev, "could not get xclk");
 970                 return PTR_ERR(imx214->xclk);
 971         }
 972
 973         ret = clk_set_rate(imx214->xclk, IMX214_DEFAULT_CLK_FREQ);
 974         if (ret) {
 975                 dev_err(dev, "could not set xclk frequency\n");
 976                 return ret;
 977         }
 978
 979         ret = imx214_get_regulators(dev, imx214);
 980         if (ret < 0) {
 981                 dev_err(dev, "cannot get regulators\n");
 982                 return ret;
 983         }
 984
 985         imx214->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
 986         if (IS_ERR(imx214->enable_gpio)) {
 987                 dev_err(dev, "cannot get enable gpio\n");
 988                 return PTR_ERR(imx214->enable_gpio);
 989         }
 990
 991         imx214->regmap = devm_regmap_init_i2c(client, &sensor_regmap_config);
 992         if (IS_ERR(imx214->regmap)) {
 993                 dev_err(dev, "regmap init failed\n");
 994                 return PTR_ERR(imx214->regmap);
 995         }
 996
 997         v4l2_i2c_subdev_init(&imx214->sd, client, &imx214_subdev_ops);
 998
 999         /*
1000          * Enable power initially, to avoid warnings
1001          * from clk_disable on power_off
1002          */
1003         imx214_power_on(imx214->dev);
1004
1005         pm_runtime_set_active(imx214->dev);
1006         pm_runtime_enable(imx214->dev);
1007         pm_runtime_idle(imx214->dev);
1008
1009         v4l2_ctrl_handler_init(&imx214->ctrls, 3);
1010
1011         imx214->pixel_rate = v4l2_ctrl_new_std(&imx214->ctrls, NULL,
1012                                                V4L2_CID_PIXEL_RATE, 0,
1013                                                IMX214_DEFAULT_PIXEL_RATE, 1,
1014                                                IMX214_DEFAULT_PIXEL_RATE);
1015         imx214->link_freq = v4l2_ctrl_new_int_menu(&imx214->ctrls, NULL,
1016                                                    V4L2_CID_LINK_FREQ,
1017                                                    ARRAY_SIZE(link_freq) - 1,
1018                                                    0, link_freq);
1019         if (imx214->link_freq)
1020                 imx214->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1021
1022         /*
1023          * WARNING!
1024          * Values obtained reverse engineering blobs and/or devices.
1025          * Ranges and functionality might be wrong.
1026          *
1027          * Sony, please release some register set documentation for the
1028          * device.
1029          *
1030          * Yours sincerely, Ricardo.
1031          */
1032         imx214->exposure = v4l2_ctrl_new_std(&imx214->ctrls, &imx214_ctrl_ops,
1033                                              V4L2_CID_EXPOSURE,
1034                                              0, 3184, 1, 0x0c70);
1035
1036         imx214->unit_size = v4l2_ctrl_new_std_compound(&imx214->ctrls,
1037                                 NULL,
1038                                 V4L2_CID_UNIT_CELL_SIZE,
1039                                 v4l2_ctrl_ptr_create((void *)&unit_size));
1040         ret = imx214->ctrls.error;
1041         if (ret) {
1042                 dev_err(&client->dev, "%s control init failed (%d)\n",
1043                         __func__, ret);
1044                 goto free_ctrl;
1045         }
1046
1047         imx214->sd.ctrl_handler = &imx214->ctrls;
1048         mutex_init(&imx214->mutex);
1049         imx214->ctrls.lock = &imx214->mutex;
1050
1051         imx214->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1052         imx214->pad.flags = MEDIA_PAD_FL_SOURCE;
1053         imx214->sd.dev = &client->dev;
1054         imx214->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1055
1056         ret = media_entity_pads_init(&imx214->sd.entity, 1, &imx214->pad);
1057         if (ret < 0) {
1058                 dev_err(dev, "could not register media entity\n");
1059                 goto free_ctrl;
1060         }
1061
1062         imx214_entity_init_cfg(&imx214->sd, NULL);
1063
1064         ret = v4l2_async_register_subdev_sensor_common(&imx214->sd);
1065         if (ret < 0) {
1066                 dev_err(dev, "could not register v4l2 device\n");
1067                 goto free_entity;
1068         }
1069
1070         return 0;
1071
1072 free_entity:
1073         media_entity_cleanup(&imx214->sd.entity);
1074 free_ctrl:
1075         mutex_destroy(&imx214->mutex);
1076         v4l2_ctrl_handler_free(&imx214->ctrls);
1077         pm_runtime_disable(imx214->dev);
1078
1079         return ret;
1080 }
1081
1082 static int imx214_remove(struct i2c_client *client)
1083 {
1084         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1085         struct imx214 *imx214 = to_imx214(sd);
1086
1087         v4l2_async_unregister_subdev(&imx214->sd);
1088         media_entity_cleanup(&imx214->sd.entity);
1089         v4l2_ctrl_handler_free(&imx214->ctrls);
1090
1091         pm_runtime_disable(&client->dev);
1092         pm_runtime_set_suspended(&client->dev);
1093
1094         mutex_destroy(&imx214->mutex);
1095
1096         return 0;
1097 }
1098
1099 static const struct of_device_id imx214_of_match[] = {
1100         { .compatible = "sony,imx214" },
1101         { }
1102 };
1103 MODULE_DEVICE_TABLE(of, imx214_of_match);
1104
1105 static const struct dev_pm_ops imx214_pm_ops = {
1106         SET_SYSTEM_SLEEP_PM_OPS(imx214_suspend, imx214_resume)
1107         SET_RUNTIME_PM_OPS(imx214_power_off, imx214_power_on, NULL)
1108 };
1109
1110 static struct i2c_driver imx214_i2c_driver = {
1111         .driver = {
1112                 .of_match_table = imx214_of_match,
1113                 .pm = &imx214_pm_ops,
1114                 .name  = "imx214",
1115         },
1116         .probe_new  = imx214_probe,
1117         .remove = imx214_remove,
1118 };
1119
1120 module_i2c_driver(imx214_i2c_driver);
1121
1122 MODULE_DESCRIPTION("Sony IMX214 Camera driver");
1123 MODULE_AUTHOR("Ricardo Ribalda <ribalda@kernel.org>");
1124 MODULE_LICENSE("GPL v2");