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_REG_MODE_SELECT          0x0100
  23 #define IMX214_MODE_STANDBY             0x00
  24 #define IMX214_MODE_STREAMING           0x01
  25
  26 #define IMX214_DEFAULT_CLK_FREQ 24000000
  27 #define IMX214_DEFAULT_LINK_FREQ 480000000
  28 #define IMX214_DEFAULT_PIXEL_RATE ((IMX214_DEFAULT_LINK_FREQ * 8LL) / 10)
  29 #define IMX214_FPS 30
  30 #define IMX214_MBUS_CODE MEDIA_BUS_FMT_SRGGB10_1X10
  31
  32 /* Exposure control */
  33 #define IMX214_REG_EXPOSURE             0x0202
  34 #define IMX214_EXPOSURE_MIN             0
  35 #define IMX214_EXPOSURE_MAX             3184
  36 #define IMX214_EXPOSURE_STEP            1
  37 #define IMX214_EXPOSURE_DEFAULT         3184
  38
  39 /* IMX214 native and active pixel array size */
  40 #define IMX214_NATIVE_WIDTH             4224U
  41 #define IMX214_NATIVE_HEIGHT            3136U
  42 #define IMX214_PIXEL_ARRAY_LEFT         8U
  43 #define IMX214_PIXEL_ARRAY_TOP          8U
  44 #define IMX214_PIXEL_ARRAY_WIDTH        4208U
  45 #define IMX214_PIXEL_ARRAY_HEIGHT       3120U
  46
  47 static const char * const imx214_supply_name[] = {
  48         "vdda",
  49         "vddd",
  50         "vdddo",
  51 };
  52
  53 #define IMX214_NUM_SUPPLIES ARRAY_SIZE(imx214_supply_name)
  54
  55 struct imx214 {
  56         struct device *dev;
  57         struct clk *xclk;
  58         struct regmap *regmap;
  59
  60         struct v4l2_subdev sd;
  61         struct media_pad pad;
  62         struct v4l2_mbus_framefmt fmt;
  63         struct v4l2_rect crop;
  64
  65         struct v4l2_ctrl_handler ctrls;
  66         struct v4l2_ctrl *pixel_rate;
  67         struct v4l2_ctrl *link_freq;
  68         struct v4l2_ctrl *exposure;
  69         struct v4l2_ctrl *unit_size;
  70
  71         struct regulator_bulk_data      supplies[IMX214_NUM_SUPPLIES];
  72
  73         struct gpio_desc *enable_gpio;
  74
  75         /*
  76          * Serialize control access, get/set format, get selection
  77          * and start streaming.
  78          */
  79         struct mutex mutex;
  80 };
  81
  82 struct reg_8 {
  83         u16 addr;
  84         u8 val;
  85 };
  86
  87 enum {
  88         IMX214_TABLE_WAIT_MS = 0,
  89         IMX214_TABLE_END,
  90         IMX214_MAX_RETRIES,
  91         IMX214_WAIT_MS
  92 };
  93
  94 /*From imx214_mode_tbls.h*/
  95 static const struct reg_8 mode_4096x2304[] = {
  96         {0x0114, 0x03},
  97         {0x0220, 0x00},
  98         {0x0221, 0x11},
  99         {0x0222, 0x01},
 100         {0x0340, 0x0C},
 101         {0x0341, 0x7A},
 102         {0x0342, 0x13},
 103         {0x0343, 0x90},
 104         {0x0344, 0x00},
 105         {0x0345, 0x38},
 106         {0x0346, 0x01},
 107         {0x0347, 0x98},
 108         {0x0348, 0x10},
 109         {0x0349, 0x37},
 110         {0x034A, 0x0A},
 111         {0x034B, 0x97},
 112         {0x0381, 0x01},
 113         {0x0383, 0x01},
 114         {0x0385, 0x01},
 115         {0x0387, 0x01},
 116         {0x0900, 0x00},
 117         {0x0901, 0x00},
 118         {0x0902, 0x00},
 119         {0x3000, 0x35},
 120         {0x3054, 0x01},
 121         {0x305C, 0x11},
 122
 123         {0x0112, 0x0A},
 124         {0x0113, 0x0A},
 125         {0x034C, 0x10},
 126         {0x034D, 0x00},
 127         {0x034E, 0x09},
 128         {0x034F, 0x00},
 129         {0x0401, 0x00},
 130         {0x0404, 0x00},
 131         {0x0405, 0x10},
 132         {0x0408, 0x00},
 133         {0x0409, 0x00},
 134         {0x040A, 0x00},
 135         {0x040B, 0x00},
 136         {0x040C, 0x10},
 137         {0x040D, 0x00},
 138         {0x040E, 0x09},
 139         {0x040F, 0x00},
 140
 141         {0x0301, 0x05},
 142         {0x0303, 0x02},
 143         {0x0305, 0x03},
 144         {0x0306, 0x00},
 145         {0x0307, 0x96},
 146         {0x0309, 0x0A},
 147         {0x030B, 0x01},
 148         {0x0310, 0x00},
 149
 150         {0x0820, 0x12},
 151         {0x0821, 0xC0},
 152         {0x0822, 0x00},
 153         {0x0823, 0x00},
 154
 155         {0x3A03, 0x09},
 156         {0x3A04, 0x50},
 157         {0x3A05, 0x01},
 158
 159         {0x0B06, 0x01},
 160         {0x30A2, 0x00},
 161
 162         {0x30B4, 0x00},
 163
 164         {0x3A02, 0xFF},
 165
 166         {0x3011, 0x00},
 167         {0x3013, 0x01},
 168
 169         {0x0202, 0x0C},
 170         {0x0203, 0x70},
 171         {0x0224, 0x01},
 172         {0x0225, 0xF4},
 173
 174         {0x0204, 0x00},
 175         {0x0205, 0x00},
 176         {0x020E, 0x01},
 177         {0x020F, 0x00},
 178         {0x0210, 0x01},
 179         {0x0211, 0x00},
 180         {0x0212, 0x01},
 181         {0x0213, 0x00},
 182         {0x0214, 0x01},
 183         {0x0215, 0x00},
 184         {0x0216, 0x00},
 185         {0x0217, 0x00},
 186
 187         {0x4170, 0x00},
 188         {0x4171, 0x10},
 189         {0x4176, 0x00},
 190         {0x4177, 0x3C},
 191         {0xAE20, 0x04},
 192         {0xAE21, 0x5C},
 193
 194         {IMX214_TABLE_WAIT_MS, 10},
 195         {0x0138, 0x01},
 196         {IMX214_TABLE_END, 0x00}
 197 };
 198
 199 static const struct reg_8 mode_1920x1080[] = {
 200         {0x0114, 0x03},
 201         {0x0220, 0x00},
 202         {0x0221, 0x11},
 203         {0x0222, 0x01},
 204         {0x0340, 0x0C},
 205         {0x0341, 0x7A},
 206         {0x0342, 0x13},
 207         {0x0343, 0x90},
 208         {0x0344, 0x04},
 209         {0x0345, 0x78},
 210         {0x0346, 0x03},
 211         {0x0347, 0xFC},
 212         {0x0348, 0x0B},
 213         {0x0349, 0xF7},
 214         {0x034A, 0x08},
 215         {0x034B, 0x33},
 216         {0x0381, 0x01},
 217         {0x0383, 0x01},
 218         {0x0385, 0x01},
 219         {0x0387, 0x01},
 220         {0x0900, 0x00},
 221         {0x0901, 0x00},
 222         {0x0902, 0x00},
 223         {0x3000, 0x35},
 224         {0x3054, 0x01},
 225         {0x305C, 0x11},
 226
 227         {0x0112, 0x0A},
 228         {0x0113, 0x0A},
 229         {0x034C, 0x07},
 230         {0x034D, 0x80},
 231         {0x034E, 0x04},
 232         {0x034F, 0x38},
 233         {0x0401, 0x00},
 234         {0x0404, 0x00},
 235         {0x0405, 0x10},
 236         {0x0408, 0x00},
 237         {0x0409, 0x00},
 238         {0x040A, 0x00},
 239         {0x040B, 0x00},
 240         {0x040C, 0x07},
 241         {0x040D, 0x80},
 242         {0x040E, 0x04},
 243         {0x040F, 0x38},
 244
 245         {0x0301, 0x05},
 246         {0x0303, 0x02},
 247         {0x0305, 0x03},
 248         {0x0306, 0x00},
 249         {0x0307, 0x96},
 250         {0x0309, 0x0A},
 251         {0x030B, 0x01},
 252         {0x0310, 0x00},
 253
 254         {0x0820, 0x12},
 255         {0x0821, 0xC0},
 256         {0x0822, 0x00},
 257         {0x0823, 0x00},
 258
 259         {0x3A03, 0x04},
 260         {0x3A04, 0xF8},
 261         {0x3A05, 0x02},
 262
 263         {0x0B06, 0x01},
 264         {0x30A2, 0x00},
 265
 266         {0x30B4, 0x00},
 267
 268         {0x3A02, 0xFF},
 269
 270         {0x3011, 0x00},
 271         {0x3013, 0x01},
 272
 273         {0x0202, 0x0C},
 274         {0x0203, 0x70},
 275         {0x0224, 0x01},
 276         {0x0225, 0xF4},
 277
 278         {0x0204, 0x00},
 279         {0x0205, 0x00},
 280         {0x020E, 0x01},
 281         {0x020F, 0x00},
 282         {0x0210, 0x01},
 283         {0x0211, 0x00},
 284         {0x0212, 0x01},
 285         {0x0213, 0x00},
 286         {0x0214, 0x01},
 287         {0x0215, 0x00},
 288         {0x0216, 0x00},
 289         {0x0217, 0x00},
 290
 291         {0x4170, 0x00},
 292         {0x4171, 0x10},
 293         {0x4176, 0x00},
 294         {0x4177, 0x3C},
 295         {0xAE20, 0x04},
 296         {0xAE21, 0x5C},
 297
 298         {IMX214_TABLE_WAIT_MS, 10},
 299         {0x0138, 0x01},
 300         {IMX214_TABLE_END, 0x00}
 301 };
 302
 303 static const struct reg_8 mode_table_common[] = {
 304         /* software reset */
 305
 306         /* software standby settings */
 307         {0x0100, 0x00},
 308
 309         /* ATR setting */
 310         {0x9300, 0x02},
 311
 312         /* external clock setting */
 313         {0x0136, 0x18},
 314         {0x0137, 0x00},
 315
 316         /* global setting */
 317         /* basic config */
 318         {0x0101, 0x00},
 319         {0x0105, 0x01},
 320         {0x0106, 0x01},
 321         {0x4550, 0x02},
 322         {0x4601, 0x00},
 323         {0x4642, 0x05},
 324         {0x6227, 0x11},
 325         {0x6276, 0x00},
 326         {0x900E, 0x06},
 327         {0xA802, 0x90},
 328         {0xA803, 0x11},
 329         {0xA804, 0x62},
 330         {0xA805, 0x77},
 331         {0xA806, 0xAE},
 332         {0xA807, 0x34},
 333         {0xA808, 0xAE},
 334         {0xA809, 0x35},
 335         {0xA80A, 0x62},
 336         {0xA80B, 0x83},
 337         {0xAE33, 0x00},
 338
 339         /* analog setting */
 340         {0x4174, 0x00},
 341         {0x4175, 0x11},
 342         {0x4612, 0x29},
 343         {0x461B, 0x12},
 344         {0x461F, 0x06},
 345         {0x4635, 0x07},
 346         {0x4637, 0x30},
 347         {0x463F, 0x18},
 348         {0x4641, 0x0D},
 349         {0x465B, 0x12},
 350         {0x465F, 0x11},
 351         {0x4663, 0x11},
 352         {0x4667, 0x0F},
 353         {0x466F, 0x0F},
 354         {0x470E, 0x09},
 355         {0x4909, 0xAB},
 356         {0x490B, 0x95},
 357         {0x4915, 0x5D},
 358         {0x4A5F, 0xFF},
 359         {0x4A61, 0xFF},
 360         {0x4A73, 0x62},
 361         {0x4A85, 0x00},
 362         {0x4A87, 0xFF},
 363
 364         /* embedded data */
 365         {0x5041, 0x04},
 366         {0x583C, 0x04},
 367         {0x620E, 0x04},
 368         {0x6EB2, 0x01},
 369         {0x6EB3, 0x00},
 370         {0x9300, 0x02},
 371
 372         /* imagequality */
 373         /* HDR setting */
 374         {0x3001, 0x07},
 375         {0x6D12, 0x3F},
 376         {0x6D13, 0xFF},
 377         {0x9344, 0x03},
 378         {0x9706, 0x10},
 379         {0x9707, 0x03},
 380         {0x9708, 0x03},
 381         {0x9E04, 0x01},
 382         {0x9E05, 0x00},
 383         {0x9E0C, 0x01},
 384         {0x9E0D, 0x02},
 385         {0x9E24, 0x00},
 386         {0x9E25, 0x8C},
 387         {0x9E26, 0x00},
 388         {0x9E27, 0x94},
 389         {0x9E28, 0x00},
 390         {0x9E29, 0x96},
 391
 392         /* CNR parameter setting */
 393         {0x69DB, 0x01},
 394
 395         /* Moire reduction */
 396         {0x6957, 0x01},
 397
 398         /* image enhancement */
 399         {0x6987, 0x17},
 400         {0x698A, 0x03},
 401         {0x698B, 0x03},
 402
 403         /* white balanace */
 404         {0x0B8E, 0x01},
 405         {0x0B8F, 0x00},
 406         {0x0B90, 0x01},
 407         {0x0B91, 0x00},
 408         {0x0B92, 0x01},
 409         {0x0B93, 0x00},
 410         {0x0B94, 0x01},
 411         {0x0B95, 0x00},
 412
 413         /* ATR setting */
 414         {0x6E50, 0x00},
 415         {0x6E51, 0x32},
 416         {0x9340, 0x00},
 417         {0x9341, 0x3C},
 418         {0x9342, 0x03},
 419         {0x9343, 0xFF},
 420         {IMX214_TABLE_END, 0x00}
 421 };
 422
 423 /*
 424  * Declare modes in order, from biggest
 425  * to smallest height.
 426  */
 427 static const struct imx214_mode {
 428         u32 width;
 429         u32 height;
 430         const struct reg_8 *reg_table;
 431 } imx214_modes[] = {
 432         {
 433                 .width = 4096,
 434                 .height = 2304,
 435                 .reg_table = mode_4096x2304,
 436         },
 437         {
 438                 .width = 1920,
 439                 .height = 1080,
 440                 .reg_table = mode_1920x1080,
 441         },
 442 };
 443
 444 static inline struct imx214 *to_imx214(struct v4l2_subdev *sd)
 445 {
 446         return container_of(sd, struct imx214, sd);
 447 }
 448
 449 static int __maybe_unused imx214_power_on(struct device *dev)
 450 {
 451         struct i2c_client *client = to_i2c_client(dev);
 452         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 453         struct imx214 *imx214 = to_imx214(sd);
 454         int ret;
 455
 456         ret = regulator_bulk_enable(IMX214_NUM_SUPPLIES, imx214->supplies);
 457         if (ret < 0) {
 458                 dev_err(imx214->dev, "failed to enable regulators: %d\n", ret);
 459                 return ret;
 460         }
 461
 462         usleep_range(2000, 3000);
 463
 464         ret = clk_prepare_enable(imx214->xclk);
 465         if (ret < 0) {
 466                 regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
 467                 dev_err(imx214->dev, "clk prepare enable failed\n");
 468                 return ret;
 469         }
 470
 471         gpiod_set_value_cansleep(imx214->enable_gpio, 1);
 472         usleep_range(12000, 15000);
 473
 474         return 0;
 475 }
 476
 477 static int __maybe_unused imx214_power_off(struct device *dev)
 478 {
 479         struct i2c_client *client = to_i2c_client(dev);
 480         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 481         struct imx214 *imx214 = to_imx214(sd);
 482
 483         gpiod_set_value_cansleep(imx214->enable_gpio, 0);
 484
 485         clk_disable_unprepare(imx214->xclk);
 486
 487         regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
 488         usleep_range(10, 20);
 489
 490         return 0;
 491 }
 492
 493 static int imx214_enum_mbus_code(struct v4l2_subdev *sd,
 494                                  struct v4l2_subdev_state *sd_state,
 495                                  struct v4l2_subdev_mbus_code_enum *code)
 496 {
 497         if (code->index > 0)
 498                 return -EINVAL;
 499
 500         code->code = IMX214_MBUS_CODE;
 501
 502         return 0;
 503 }
 504
 505 static int imx214_enum_frame_size(struct v4l2_subdev *subdev,
 506                                   struct v4l2_subdev_state *sd_state,
 507                                   struct v4l2_subdev_frame_size_enum *fse)
 508 {
 509         if (fse->code != IMX214_MBUS_CODE)
 510                 return -EINVAL;
 511
 512         if (fse->index >= ARRAY_SIZE(imx214_modes))
 513                 return -EINVAL;
 514
 515         fse->min_width = fse->max_width = imx214_modes[fse->index].width;
 516         fse->min_height = fse->max_height = imx214_modes[fse->index].height;
 517
 518         return 0;
 519 }
 520
 521 #ifdef CONFIG_VIDEO_ADV_DEBUG
 522 static int imx214_s_register(struct v4l2_subdev *subdev,
 523                              const struct v4l2_dbg_register *reg)
 524 {
 525         struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
 526
 527         return regmap_write(imx214->regmap, reg->reg, reg->val);
 528 }
 529
 530 static int imx214_g_register(struct v4l2_subdev *subdev,
 531                              struct v4l2_dbg_register *reg)
 532 {
 533         struct imx214 *imx214 = container_of(subdev, struct imx214, sd);
 534         unsigned int aux;
 535         int ret;
 536
 537         reg->size = 1;
 538         ret = regmap_read(imx214->regmap, reg->reg, &aux);
 539         reg->val = aux;
 540
 541         return ret;
 542 }
 543 #endif
 544
 545 static const struct v4l2_subdev_core_ops imx214_core_ops = {
 546 #ifdef CONFIG_VIDEO_ADV_DEBUG
 547         .g_register = imx214_g_register,
 548         .s_register = imx214_s_register,
 549 #endif
 550 };
 551
 552 static struct v4l2_mbus_framefmt *
 553 __imx214_get_pad_format(struct imx214 *imx214,
 554                         struct v4l2_subdev_state *sd_state,
 555                         unsigned int pad,
 556                         enum v4l2_subdev_format_whence which)
 557 {
 558         switch (which) {
 559         case V4L2_SUBDEV_FORMAT_TRY:
 560                 return v4l2_subdev_state_get_format(sd_state, pad);
 561         case V4L2_SUBDEV_FORMAT_ACTIVE:
 562                 return &imx214->fmt;
 563         default:
 564                 return NULL;
 565         }
 566 }
 567
 568 static int imx214_get_format(struct v4l2_subdev *sd,
 569                              struct v4l2_subdev_state *sd_state,
 570                              struct v4l2_subdev_format *format)
 571 {
 572         struct imx214 *imx214 = to_imx214(sd);
 573
 574         mutex_lock(&imx214->mutex);
 575         format->format = *__imx214_get_pad_format(imx214, sd_state,
 576                                                   format->pad,
 577                                                   format->which);
 578         mutex_unlock(&imx214->mutex);
 579
 580         return 0;
 581 }
 582
 583 static struct v4l2_rect *
 584 __imx214_get_pad_crop(struct imx214 *imx214,
 585                       struct v4l2_subdev_state *sd_state,
 586                       unsigned int pad, enum v4l2_subdev_format_whence which)
 587 {
 588         switch (which) {
 589         case V4L2_SUBDEV_FORMAT_TRY:
 590                 return v4l2_subdev_state_get_crop(sd_state, pad);
 591         case V4L2_SUBDEV_FORMAT_ACTIVE:
 592                 return &imx214->crop;
 593         default:
 594                 return NULL;
 595         }
 596 }
 597
 598 static int imx214_set_format(struct v4l2_subdev *sd,
 599                              struct v4l2_subdev_state *sd_state,
 600                              struct v4l2_subdev_format *format)
 601 {
 602         struct imx214 *imx214 = to_imx214(sd);
 603         struct v4l2_mbus_framefmt *__format;
 604         struct v4l2_rect *__crop;
 605         const struct imx214_mode *mode;
 606
 607         mutex_lock(&imx214->mutex);
 608
 609         __crop = __imx214_get_pad_crop(imx214, sd_state, format->pad,
 610                                        format->which);
 611
 612         mode = v4l2_find_nearest_size(imx214_modes,
 613                                       ARRAY_SIZE(imx214_modes), width, height,
 614                                       format->format.width,
 615                                       format->format.height);
 616
 617         __crop->width = mode->width;
 618         __crop->height = mode->height;
 619
 620         __format = __imx214_get_pad_format(imx214, sd_state, format->pad,
 621                                            format->which);
 622         __format->width = __crop->width;
 623         __format->height = __crop->height;
 624         __format->code = IMX214_MBUS_CODE;
 625         __format->field = V4L2_FIELD_NONE;
 626         __format->colorspace = V4L2_COLORSPACE_SRGB;
 627         __format->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(__format->colorspace);
 628         __format->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
 629                                 __format->colorspace, __format->ycbcr_enc);
 630         __format->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(__format->colorspace);
 631
 632         format->format = *__format;
 633
 634         mutex_unlock(&imx214->mutex);
 635
 636         return 0;
 637 }
 638
 639 static int imx214_get_selection(struct v4l2_subdev *sd,
 640                                 struct v4l2_subdev_state *sd_state,
 641                                 struct v4l2_subdev_selection *sel)
 642 {
 643         struct imx214 *imx214 = to_imx214(sd);
 644
 645         switch (sel->target) {
 646         case V4L2_SEL_TGT_CROP:
 647                 mutex_lock(&imx214->mutex);
 648                 sel->r = *__imx214_get_pad_crop(imx214, sd_state, sel->pad,
 649                                                 sel->which);
 650                 mutex_unlock(&imx214->mutex);
 651                 return 0;
 652
 653         case V4L2_SEL_TGT_NATIVE_SIZE:
 654                 sel->r.top = 0;
 655                 sel->r.left = 0;
 656                 sel->r.width = IMX214_NATIVE_WIDTH;
 657                 sel->r.height = IMX214_NATIVE_HEIGHT;
 658                 return 0;
 659
 660         case V4L2_SEL_TGT_CROP_DEFAULT:
 661         case V4L2_SEL_TGT_CROP_BOUNDS:
 662                 sel->r.top = IMX214_PIXEL_ARRAY_TOP;
 663                 sel->r.left = IMX214_PIXEL_ARRAY_LEFT;
 664                 sel->r.width = IMX214_PIXEL_ARRAY_WIDTH;
 665                 sel->r.height = IMX214_PIXEL_ARRAY_HEIGHT;
 666                 return 0;
 667         }
 668
 669         return -EINVAL;
 670 }
 671
 672 static int imx214_entity_init_state(struct v4l2_subdev *subdev,
 673                                     struct v4l2_subdev_state *sd_state)
 674 {
 675         struct v4l2_subdev_format fmt = { };
 676
 677         fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 678         fmt.format.width = imx214_modes[0].width;
 679         fmt.format.height = imx214_modes[0].height;
 680
 681         imx214_set_format(subdev, sd_state, &fmt);
 682
 683         return 0;
 684 }
 685
 686 static int imx214_set_ctrl(struct v4l2_ctrl *ctrl)
 687 {
 688         struct imx214 *imx214 = container_of(ctrl->handler,
 689                                              struct imx214, ctrls);
 690         u8 vals[2];
 691         int ret;
 692
 693         /*
 694          * Applying V4L2 control value only happens
 695          * when power is up for streaming
 696          */
 697         if (!pm_runtime_get_if_in_use(imx214->dev))
 698                 return 0;
 699
 700         switch (ctrl->id) {
 701         case V4L2_CID_EXPOSURE:
 702                 vals[1] = ctrl->val;
 703                 vals[0] = ctrl->val >> 8;
 704                 ret = regmap_bulk_write(imx214->regmap, IMX214_REG_EXPOSURE, vals, 2);
 705                 if (ret < 0)
 706                         dev_err(imx214->dev, "Error %d\n", ret);
 707                 ret = 0;
 708                 break;
 709
 710         default:
 711                 ret = -EINVAL;
 712         }
 713
 714         pm_runtime_put(imx214->dev);
 715
 716         return ret;
 717 }
 718
 719 static const struct v4l2_ctrl_ops imx214_ctrl_ops = {
 720         .s_ctrl = imx214_set_ctrl,
 721 };
 722
 723 static int imx214_ctrls_init(struct imx214 *imx214)
 724 {
 725         static const s64 link_freq[] = {
 726                 IMX214_DEFAULT_LINK_FREQ
 727         };
 728         static const struct v4l2_area unit_size = {
 729                 .width = 1120,
 730                 .height = 1120,
 731         };
 732         struct v4l2_fwnode_device_properties props;
 733         struct v4l2_ctrl_handler *ctrl_hdlr;
 734         int ret;
 735
 736         ret = v4l2_fwnode_device_parse(imx214->dev, &props);
 737         if (ret < 0)
 738                 return ret;
 739
 740         ctrl_hdlr = &imx214->ctrls;
 741         ret = v4l2_ctrl_handler_init(&imx214->ctrls, 6);
 742         if (ret)
 743                 return ret;
 744
 745         imx214->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, NULL,
 746                                                V4L2_CID_PIXEL_RATE, 0,
 747                                                IMX214_DEFAULT_PIXEL_RATE, 1,
 748                                                IMX214_DEFAULT_PIXEL_RATE);
 749
 750         imx214->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, NULL,
 751                                                    V4L2_CID_LINK_FREQ,
 752                                                    ARRAY_SIZE(link_freq) - 1,
 753                                                    0, link_freq);
 754         if (imx214->link_freq)
 755                 imx214->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
 756
 757         /*
 758          * WARNING!
 759          * Values obtained reverse engineering blobs and/or devices.
 760          * Ranges and functionality might be wrong.
 761          *
 762          * Sony, please release some register set documentation for the
 763          * device.
 764          *
 765          * Yours sincerely, Ricardo.
 766          */
 767         imx214->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx214_ctrl_ops,
 768                                              V4L2_CID_EXPOSURE,
 769                                              IMX214_EXPOSURE_MIN,
 770                                              IMX214_EXPOSURE_MAX,
 771                                              IMX214_EXPOSURE_STEP,
 772                                              IMX214_EXPOSURE_DEFAULT);
 773
 774         imx214->unit_size = v4l2_ctrl_new_std_compound(ctrl_hdlr,
 775                                 NULL,
 776                                 V4L2_CID_UNIT_CELL_SIZE,
 777                                 v4l2_ctrl_ptr_create((void *)&unit_size));
 778
 779         v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &imx214_ctrl_ops, &props);
 780
 781         ret = ctrl_hdlr->error;
 782         if (ret) {
 783                 v4l2_ctrl_handler_free(ctrl_hdlr);
 784                 dev_err(imx214->dev, "failed to add controls: %d\n", ret);
 785                 return ret;
 786         }
 787
 788         imx214->sd.ctrl_handler = ctrl_hdlr;
 789
 790         return 0;
 791 };
 792
 793 #define MAX_CMD 4
 794 static int imx214_write_table(struct imx214 *imx214,
 795                               const struct reg_8 table[])
 796 {
 797         u8 vals[MAX_CMD];
 798         int i;
 799         int ret;
 800
 801         for (; table->addr != IMX214_TABLE_END ; table++) {
 802                 if (table->addr == IMX214_TABLE_WAIT_MS) {
 803                         usleep_range(table->val * 1000,
 804                                      table->val * 1000 + 500);
 805                         continue;
 806                 }
 807
 808                 for (i = 0; i < MAX_CMD; i++) {
 809                         if (table[i].addr != (table[0].addr + i))
 810                                 break;
 811                         vals[i] = table[i].val;
 812                 }
 813
 814                 ret = regmap_bulk_write(imx214->regmap, table->addr, vals, i);
 815
 816                 if (ret) {
 817                         dev_err(imx214->dev, "write_table error: %d\n", ret);
 818                         return ret;
 819                 }
 820
 821                 table += i - 1;
 822         }
 823
 824         return 0;
 825 }
 826
 827 static int imx214_start_streaming(struct imx214 *imx214)
 828 {
 829         const struct imx214_mode *mode;
 830         int ret;
 831
 832         mutex_lock(&imx214->mutex);
 833         ret = imx214_write_table(imx214, mode_table_common);
 834         if (ret < 0) {
 835                 dev_err(imx214->dev, "could not sent common table %d\n", ret);
 836                 goto error;
 837         }
 838
 839         mode = v4l2_find_nearest_size(imx214_modes,
 840                                 ARRAY_SIZE(imx214_modes), width, height,
 841                                 imx214->fmt.width, imx214->fmt.height);
 842         ret = imx214_write_table(imx214, mode->reg_table);
 843         if (ret < 0) {
 844                 dev_err(imx214->dev, "could not sent mode table %d\n", ret);
 845                 goto error;
 846         }
 847         ret = __v4l2_ctrl_handler_setup(&imx214->ctrls);
 848         if (ret < 0) {
 849                 dev_err(imx214->dev, "could not sync v4l2 controls\n");
 850                 goto error;
 851         }
 852         ret = regmap_write(imx214->regmap, IMX214_REG_MODE_SELECT, IMX214_MODE_STREAMING);
 853         if (ret < 0) {
 854                 dev_err(imx214->dev, "could not sent start table %d\n", ret);
 855                 goto error;
 856         }
 857
 858         mutex_unlock(&imx214->mutex);
 859         return 0;
 860
 861 error:
 862         mutex_unlock(&imx214->mutex);
 863         return ret;
 864 }
 865
 866 static int imx214_stop_streaming(struct imx214 *imx214)
 867 {
 868         int ret;
 869
 870         ret = regmap_write(imx214->regmap, IMX214_REG_MODE_SELECT, IMX214_MODE_STANDBY);
 871         if (ret < 0)
 872                 dev_err(imx214->dev, "could not sent stop table %d\n",  ret);
 873
 874         return ret;
 875 }
 876
 877 static int imx214_s_stream(struct v4l2_subdev *subdev, int enable)
 878 {
 879         struct imx214 *imx214 = to_imx214(subdev);
 880         int ret;
 881
 882         if (enable) {
 883                 ret = pm_runtime_resume_and_get(imx214->dev);
 884                 if (ret < 0)
 885                         return ret;
 886
 887                 ret = imx214_start_streaming(imx214);
 888                 if (ret < 0)
 889                         goto err_rpm_put;
 890         } else {
 891                 ret = imx214_stop_streaming(imx214);
 892                 if (ret < 0)
 893                         goto err_rpm_put;
 894                 pm_runtime_put(imx214->dev);
 895         }
 896
 897         return 0;
 898
 899 err_rpm_put:
 900         pm_runtime_put(imx214->dev);
 901         return ret;
 902 }
 903
 904 static int imx214_get_frame_interval(struct v4l2_subdev *subdev,
 905                                      struct v4l2_subdev_state *sd_state,
 906                                      struct v4l2_subdev_frame_interval *fival)
 907 {
 908         /*
 909          * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2
 910          * subdev active state API.
 911          */
 912         if (fival->which != V4L2_SUBDEV_FORMAT_ACTIVE)
 913                 return -EINVAL;
 914
 915         fival->interval.numerator = 1;
 916         fival->interval.denominator = IMX214_FPS;
 917
 918         return 0;
 919 }
 920
 921 static int imx214_enum_frame_interval(struct v4l2_subdev *subdev,
 922                                 struct v4l2_subdev_state *sd_state,
 923                                 struct v4l2_subdev_frame_interval_enum *fie)
 924 {
 925         const struct imx214_mode *mode;
 926
 927         if (fie->index != 0)
 928                 return -EINVAL;
 929
 930         mode = v4l2_find_nearest_size(imx214_modes,
 931                                 ARRAY_SIZE(imx214_modes), width, height,
 932                                 fie->width, fie->height);
 933
 934         fie->code = IMX214_MBUS_CODE;
 935         fie->width = mode->width;
 936         fie->height = mode->height;
 937         fie->interval.numerator = 1;
 938         fie->interval.denominator = IMX214_FPS;
 939
 940         return 0;
 941 }
 942
 943 static const struct v4l2_subdev_video_ops imx214_video_ops = {
 944         .s_stream = imx214_s_stream,
 945 };
 946
 947 static const struct v4l2_subdev_pad_ops imx214_subdev_pad_ops = {
 948         .enum_mbus_code = imx214_enum_mbus_code,
 949         .enum_frame_size = imx214_enum_frame_size,
 950         .enum_frame_interval = imx214_enum_frame_interval,
 951         .get_fmt = imx214_get_format,
 952         .set_fmt = imx214_set_format,
 953         .get_selection = imx214_get_selection,
 954         .get_frame_interval = imx214_get_frame_interval,
 955         .set_frame_interval = imx214_get_frame_interval,
 956 };
 957
 958 static const struct v4l2_subdev_ops imx214_subdev_ops = {
 959         .core = &imx214_core_ops,
 960         .video = &imx214_video_ops,
 961         .pad = &imx214_subdev_pad_ops,
 962 };
 963
 964 static const struct v4l2_subdev_internal_ops imx214_internal_ops = {
 965         .init_state = imx214_entity_init_state,
 966 };
 967
 968 static const struct regmap_config sensor_regmap_config = {
 969         .reg_bits = 16,
 970         .val_bits = 8,
 971         .cache_type = REGCACHE_MAPLE,
 972 };
 973
 974 static int imx214_get_regulators(struct device *dev, struct imx214 *imx214)
 975 {
 976         unsigned int i;
 977
 978         for (i = 0; i < IMX214_NUM_SUPPLIES; i++)
 979                 imx214->supplies[i].supply = imx214_supply_name[i];
 980
 981         return devm_regulator_bulk_get(dev, IMX214_NUM_SUPPLIES,
 982                                        imx214->supplies);
 983 }
 984
 985 static int imx214_parse_fwnode(struct device *dev)
 986 {
 987         struct fwnode_handle *endpoint;
 988         struct v4l2_fwnode_endpoint bus_cfg = {
 989                 .bus_type = V4L2_MBUS_CSI2_DPHY,
 990         };
 991         unsigned int i;
 992         int ret;
 993
 994         endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
 995         if (!endpoint) {
 996                 dev_err(dev, "endpoint node not found\n");
 997                 return -EINVAL;
 998         }
 999
1000         ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
1001         if (ret) {
1002                 dev_err(dev, "parsing endpoint node failed\n");
1003                 goto done;
1004         }
1005
1006         for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
1007                 if (bus_cfg.link_frequencies[i] == IMX214_DEFAULT_LINK_FREQ)
1008                         break;
1009
1010         if (i == bus_cfg.nr_of_link_frequencies) {
1011                 dev_err(dev, "link-frequencies %d not supported, Please review your DT\n",
1012                         IMX214_DEFAULT_LINK_FREQ);
1013                 ret = -EINVAL;
1014                 goto done;
1015         }
1016
1017 done:
1018         v4l2_fwnode_endpoint_free(&bus_cfg);
1019         fwnode_handle_put(endpoint);
1020         return ret;
1021 }
1022
1023 static int imx214_probe(struct i2c_client *client)
1024 {
1025         struct device *dev = &client->dev;
1026         struct imx214 *imx214;
1027         int ret;
1028
1029         ret = imx214_parse_fwnode(dev);
1030         if (ret)
1031                 return ret;
1032
1033         imx214 = devm_kzalloc(dev, sizeof(*imx214), GFP_KERNEL);
1034         if (!imx214)
1035                 return -ENOMEM;
1036
1037         imx214->dev = dev;
1038
1039         imx214->xclk = devm_clk_get(dev, NULL);
1040         if (IS_ERR(imx214->xclk)) {
1041                 dev_err(dev, "could not get xclk");
1042                 return PTR_ERR(imx214->xclk);
1043         }
1044
1045         ret = clk_set_rate(imx214->xclk, IMX214_DEFAULT_CLK_FREQ);
1046         if (ret) {
1047                 dev_err(dev, "could not set xclk frequency\n");
1048                 return ret;
1049         }
1050
1051         ret = imx214_get_regulators(dev, imx214);
1052         if (ret < 0) {
1053                 dev_err(dev, "cannot get regulators\n");
1054                 return ret;
1055         }
1056
1057         imx214->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
1058         if (IS_ERR(imx214->enable_gpio)) {
1059                 dev_err(dev, "cannot get enable gpio\n");
1060                 return PTR_ERR(imx214->enable_gpio);
1061         }
1062
1063         imx214->regmap = devm_regmap_init_i2c(client, &sensor_regmap_config);
1064         if (IS_ERR(imx214->regmap)) {
1065                 dev_err(dev, "regmap init failed\n");
1066                 return PTR_ERR(imx214->regmap);
1067         }
1068
1069         v4l2_i2c_subdev_init(&imx214->sd, client, &imx214_subdev_ops);
1070         imx214->sd.internal_ops = &imx214_internal_ops;
1071
1072         /*
1073          * Enable power initially, to avoid warnings
1074          * from clk_disable on power_off
1075          */
1076         imx214_power_on(imx214->dev);
1077
1078         pm_runtime_set_active(imx214->dev);
1079         pm_runtime_enable(imx214->dev);
1080         pm_runtime_idle(imx214->dev);
1081
1082         ret = imx214_ctrls_init(imx214);
1083         if (ret < 0)
1084                 goto error_power_off;
1085
1086         mutex_init(&imx214->mutex);
1087         imx214->ctrls.lock = &imx214->mutex;
1088
1089         imx214->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1090         imx214->pad.flags = MEDIA_PAD_FL_SOURCE;
1091         imx214->sd.dev = &client->dev;
1092         imx214->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1093
1094         ret = media_entity_pads_init(&imx214->sd.entity, 1, &imx214->pad);
1095         if (ret < 0) {
1096                 dev_err(dev, "could not register media entity\n");
1097                 goto free_ctrl;
1098         }
1099
1100         imx214_entity_init_state(&imx214->sd, NULL);
1101
1102         ret = v4l2_async_register_subdev_sensor(&imx214->sd);
1103         if (ret < 0) {
1104                 dev_err(dev, "could not register v4l2 device\n");
1105                 goto free_entity;
1106         }
1107
1108         return 0;
1109
1110 free_entity:
1111         media_entity_cleanup(&imx214->sd.entity);
1112 free_ctrl:
1113         mutex_destroy(&imx214->mutex);
1114         v4l2_ctrl_handler_free(&imx214->ctrls);
1115 error_power_off:
1116         pm_runtime_disable(imx214->dev);
1117         regulator_bulk_disable(IMX214_NUM_SUPPLIES, imx214->supplies);
1118
1119         return ret;
1120 }
1121
1122 static void imx214_remove(struct i2c_client *client)
1123 {
1124         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1125         struct imx214 *imx214 = to_imx214(sd);
1126
1127         v4l2_async_unregister_subdev(&imx214->sd);
1128         media_entity_cleanup(&imx214->sd.entity);
1129         v4l2_ctrl_handler_free(&imx214->ctrls);
1130
1131         pm_runtime_disable(&client->dev);
1132         pm_runtime_set_suspended(&client->dev);
1133
1134         mutex_destroy(&imx214->mutex);
1135 }
1136
1137 static const struct of_device_id imx214_of_match[] = {
1138         { .compatible = "sony,imx214" },
1139         { }
1140 };
1141 MODULE_DEVICE_TABLE(of, imx214_of_match);
1142
1143 static const struct dev_pm_ops imx214_pm_ops = {
1144         SET_RUNTIME_PM_OPS(imx214_power_off, imx214_power_on, NULL)
1145 };
1146
1147 static struct i2c_driver imx214_i2c_driver = {
1148         .driver = {
1149                 .of_match_table = imx214_of_match,
1150                 .pm = &imx214_pm_ops,
1151                 .name  = "imx214",
1152         },
1153         .probe = imx214_probe,
1154         .remove = imx214_remove,
1155 };
1156
1157 module_i2c_driver(imx214_i2c_driver);
1158
1159 MODULE_DESCRIPTION("Sony IMX214 Camera driver");
1160 MODULE_AUTHOR("Ricardo Ribalda <ribalda@kernel.org>");
1161 MODULE_LICENSE("GPL v2");