drivers/media/i2c/imx219.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * A V4L2 driver for Sony IMX219 cameras.
   4  * Copyright (C) 2019, Raspberry Pi (Trading) Ltd
   5  *
   6  * Based on Sony imx258 camera driver
   7  * Copyright (C) 2018 Intel Corporation
   8  *
   9  * DT / fwnode changes, and regulator / GPIO control taken from imx214 driver
  10  * Copyright 2018 Qtechnology A/S
  11  *
  12  * Flip handling taken from the Sony IMX319 driver.
  13  * Copyright (C) 2018 Intel Corporation
  14  *
  15  */
  16
  17 #include <linux/clk.h>
  18 #include <linux/delay.h>
  19 #include <linux/gpio/consumer.h>
  20 #include <linux/i2c.h>
  21 #include <linux/module.h>
  22 #include <linux/pm_runtime.h>
  23 #include <linux/regulator/consumer.h>
  24 #include <media/v4l2-ctrls.h>
  25 #include <media/v4l2-device.h>
  26 #include <media/v4l2-event.h>
  27 #include <media/v4l2-fwnode.h>
  28 #include <media/v4l2-mediabus.h>
  29 #include <asm/unaligned.h>
  30
  31 #define IMX219_REG_VALUE_08BIT          1
  32 #define IMX219_REG_VALUE_16BIT          2
  33
  34 #define IMX219_REG_MODE_SELECT          0x0100
  35 #define IMX219_MODE_STANDBY             0x00
  36 #define IMX219_MODE_STREAMING           0x01
  37
  38 /* Chip ID */
  39 #define IMX219_REG_CHIP_ID              0x0000
  40 #define IMX219_CHIP_ID                  0x0219
  41
  42 /* External clock frequency is 24.0M */
  43 #define IMX219_XCLK_FREQ                24000000
  44
  45 /* Pixel rate is fixed at 182.4M for all the modes */
  46 #define IMX219_PIXEL_RATE               182400000
  47
  48 #define IMX219_DEFAULT_LINK_FREQ        456000000
  49
  50 /* V_TIMING internal */
  51 #define IMX219_REG_VTS                  0x0160
  52 #define IMX219_VTS_15FPS                0x0dc6
  53 #define IMX219_VTS_30FPS_1080P          0x06e3
  54 #define IMX219_VTS_30FPS_BINNED         0x06e3
  55 #define IMX219_VTS_30FPS_640x480        0x06e3
  56 #define IMX219_VTS_MAX                  0xffff
  57
  58 #define IMX219_VBLANK_MIN               4
  59
  60 /*Frame Length Line*/
  61 #define IMX219_FLL_MIN                  0x08a6
  62 #define IMX219_FLL_MAX                  0xffff
  63 #define IMX219_FLL_STEP                 1
  64 #define IMX219_FLL_DEFAULT              0x0c98
  65
  66 /* HBLANK control - read only */
  67 #define IMX219_PPL_DEFAULT              3448
  68
  69 /* Exposure control */
  70 #define IMX219_REG_EXPOSURE             0x015a
  71 #define IMX219_EXPOSURE_MIN             4
  72 #define IMX219_EXPOSURE_STEP            1
  73 #define IMX219_EXPOSURE_DEFAULT         0x640
  74 #define IMX219_EXPOSURE_MAX             65535
  75
  76 /* Analog gain control */
  77 #define IMX219_REG_ANALOG_GAIN          0x0157
  78 #define IMX219_ANA_GAIN_MIN             0
  79 #define IMX219_ANA_GAIN_MAX             232
  80 #define IMX219_ANA_GAIN_STEP            1
  81 #define IMX219_ANA_GAIN_DEFAULT         0x0
  82
  83 /* Digital gain control */
  84 #define IMX219_REG_DIGITAL_GAIN         0x0158
  85 #define IMX219_DGTL_GAIN_MIN            0x0100
  86 #define IMX219_DGTL_GAIN_MAX            0x0fff
  87 #define IMX219_DGTL_GAIN_DEFAULT        0x0100
  88 #define IMX219_DGTL_GAIN_STEP           1
  89
  90 #define IMX219_REG_ORIENTATION          0x0172
  91
  92 /* Test Pattern Control */
  93 #define IMX219_REG_TEST_PATTERN         0x0600
  94 #define IMX219_TEST_PATTERN_DISABLE     0
  95 #define IMX219_TEST_PATTERN_SOLID_COLOR 1
  96 #define IMX219_TEST_PATTERN_COLOR_BARS  2
  97 #define IMX219_TEST_PATTERN_GREY_COLOR  3
  98 #define IMX219_TEST_PATTERN_PN9         4
  99
 100 /* Test pattern colour components */
 101 #define IMX219_REG_TESTP_RED            0x0602
 102 #define IMX219_REG_TESTP_GREENR         0x0604
 103 #define IMX219_REG_TESTP_BLUE           0x0606
 104 #define IMX219_REG_TESTP_GREENB         0x0608
 105 #define IMX219_TESTP_COLOUR_MIN         0
 106 #define IMX219_TESTP_COLOUR_MAX         0x03ff
 107 #define IMX219_TESTP_COLOUR_STEP        1
 108 #define IMX219_TESTP_RED_DEFAULT        IMX219_TESTP_COLOUR_MAX
 109 #define IMX219_TESTP_GREENR_DEFAULT     0
 110 #define IMX219_TESTP_BLUE_DEFAULT       0
 111 #define IMX219_TESTP_GREENB_DEFAULT     0
 112
 113 /* IMX219 native and active pixel array size. */
 114 #define IMX219_NATIVE_WIDTH             3296U
 115 #define IMX219_NATIVE_HEIGHT            2480U
 116 #define IMX219_PIXEL_ARRAY_LEFT         8U
 117 #define IMX219_PIXEL_ARRAY_TOP          8U
 118 #define IMX219_PIXEL_ARRAY_WIDTH        3280U
 119 #define IMX219_PIXEL_ARRAY_HEIGHT       2464U
 120
 121 struct imx219_reg {
 122         u16 address;
 123         u8 val;
 124 };
 125
 126 struct imx219_reg_list {
 127         unsigned int num_of_regs;
 128         const struct imx219_reg *regs;
 129 };
 130
 131 /* Mode : resolution and related config&values */
 132 struct imx219_mode {
 133         /* Frame width */
 134         unsigned int width;
 135         /* Frame height */
 136         unsigned int height;
 137
 138         /* Analog crop rectangle. */
 139         struct v4l2_rect crop;
 140
 141         /* V-timing */
 142         unsigned int vts_def;
 143
 144         /* Default register values */
 145         struct imx219_reg_list reg_list;
 146 };
 147
 148 /*
 149  * Register sets lifted off the i2C interface from the Raspberry Pi firmware
 150  * driver.
 151  * 3280x2464 = mode 2, 1920x1080 = mode 1, 1640x1232 = mode 4, 640x480 = mode 7.
 152  */
 153 static const struct imx219_reg mode_3280x2464_regs[] = {
 154         {0x0100, 0x00},
 155         {0x30eb, 0x0c},
 156         {0x30eb, 0x05},
 157         {0x300a, 0xff},
 158         {0x300b, 0xff},
 159         {0x30eb, 0x05},
 160         {0x30eb, 0x09},
 161         {0x0114, 0x01},
 162         {0x0128, 0x00},
 163         {0x012a, 0x18},
 164         {0x012b, 0x00},
 165         {0x0164, 0x00},
 166         {0x0165, 0x00},
 167         {0x0166, 0x0c},
 168         {0x0167, 0xcf},
 169         {0x0168, 0x00},
 170         {0x0169, 0x00},
 171         {0x016a, 0x09},
 172         {0x016b, 0x9f},
 173         {0x016c, 0x0c},
 174         {0x016d, 0xd0},
 175         {0x016e, 0x09},
 176         {0x016f, 0xa0},
 177         {0x0170, 0x01},
 178         {0x0171, 0x01},
 179         {0x0174, 0x00},
 180         {0x0175, 0x00},
 181         {0x0301, 0x05},
 182         {0x0303, 0x01},
 183         {0x0304, 0x03},
 184         {0x0305, 0x03},
 185         {0x0306, 0x00},
 186         {0x0307, 0x39},
 187         {0x030b, 0x01},
 188         {0x030c, 0x00},
 189         {0x030d, 0x72},
 190         {0x0624, 0x0c},
 191         {0x0625, 0xd0},
 192         {0x0626, 0x09},
 193         {0x0627, 0xa0},
 194         {0x455e, 0x00},
 195         {0x471e, 0x4b},
 196         {0x4767, 0x0f},
 197         {0x4750, 0x14},
 198         {0x4540, 0x00},
 199         {0x47b4, 0x14},
 200         {0x4713, 0x30},
 201         {0x478b, 0x10},
 202         {0x478f, 0x10},
 203         {0x4793, 0x10},
 204         {0x4797, 0x0e},
 205         {0x479b, 0x0e},
 206         {0x0162, 0x0d},
 207         {0x0163, 0x78},
 208 };
 209
 210 static const struct imx219_reg mode_1920_1080_regs[] = {
 211         {0x0100, 0x00},
 212         {0x30eb, 0x05},
 213         {0x30eb, 0x0c},
 214         {0x300a, 0xff},
 215         {0x300b, 0xff},
 216         {0x30eb, 0x05},
 217         {0x30eb, 0x09},
 218         {0x0114, 0x01},
 219         {0x0128, 0x00},
 220         {0x012a, 0x18},
 221         {0x012b, 0x00},
 222         {0x0162, 0x0d},
 223         {0x0163, 0x78},
 224         {0x0164, 0x02},
 225         {0x0165, 0xa8},
 226         {0x0166, 0x0a},
 227         {0x0167, 0x27},
 228         {0x0168, 0x02},
 229         {0x0169, 0xb4},
 230         {0x016a, 0x06},
 231         {0x016b, 0xeb},
 232         {0x016c, 0x07},
 233         {0x016d, 0x80},
 234         {0x016e, 0x04},
 235         {0x016f, 0x38},
 236         {0x0170, 0x01},
 237         {0x0171, 0x01},
 238         {0x0174, 0x00},
 239         {0x0175, 0x00},
 240         {0x0301, 0x05},
 241         {0x0303, 0x01},
 242         {0x0304, 0x03},
 243         {0x0305, 0x03},
 244         {0x0306, 0x00},
 245         {0x0307, 0x39},
 246         {0x030b, 0x01},
 247         {0x030c, 0x00},
 248         {0x030d, 0x72},
 249         {0x0624, 0x07},
 250         {0x0625, 0x80},
 251         {0x0626, 0x04},
 252         {0x0627, 0x38},
 253         {0x455e, 0x00},
 254         {0x471e, 0x4b},
 255         {0x4767, 0x0f},
 256         {0x4750, 0x14},
 257         {0x4540, 0x00},
 258         {0x47b4, 0x14},
 259         {0x4713, 0x30},
 260         {0x478b, 0x10},
 261         {0x478f, 0x10},
 262         {0x4793, 0x10},
 263         {0x4797, 0x0e},
 264         {0x479b, 0x0e},
 265         {0x0162, 0x0d},
 266         {0x0163, 0x78},
 267 };
 268
 269 static const struct imx219_reg mode_1640_1232_regs[] = {
 270         {0x0100, 0x00},
 271         {0x30eb, 0x0c},
 272         {0x30eb, 0x05},
 273         {0x300a, 0xff},
 274         {0x300b, 0xff},
 275         {0x30eb, 0x05},
 276         {0x30eb, 0x09},
 277         {0x0114, 0x01},
 278         {0x0128, 0x00},
 279         {0x012a, 0x18},
 280         {0x012b, 0x00},
 281         {0x0164, 0x00},
 282         {0x0165, 0x00},
 283         {0x0166, 0x0c},
 284         {0x0167, 0xcf},
 285         {0x0168, 0x00},
 286         {0x0169, 0x00},
 287         {0x016a, 0x09},
 288         {0x016b, 0x9f},
 289         {0x016c, 0x06},
 290         {0x016d, 0x68},
 291         {0x016e, 0x04},
 292         {0x016f, 0xd0},
 293         {0x0170, 0x01},
 294         {0x0171, 0x01},
 295         {0x0174, 0x01},
 296         {0x0175, 0x01},
 297         {0x0301, 0x05},
 298         {0x0303, 0x01},
 299         {0x0304, 0x03},
 300         {0x0305, 0x03},
 301         {0x0306, 0x00},
 302         {0x0307, 0x39},
 303         {0x030b, 0x01},
 304         {0x030c, 0x00},
 305         {0x030d, 0x72},
 306         {0x0624, 0x06},
 307         {0x0625, 0x68},
 308         {0x0626, 0x04},
 309         {0x0627, 0xd0},
 310         {0x455e, 0x00},
 311         {0x471e, 0x4b},
 312         {0x4767, 0x0f},
 313         {0x4750, 0x14},
 314         {0x4540, 0x00},
 315         {0x47b4, 0x14},
 316         {0x4713, 0x30},
 317         {0x478b, 0x10},
 318         {0x478f, 0x10},
 319         {0x4793, 0x10},
 320         {0x4797, 0x0e},
 321         {0x479b, 0x0e},
 322         {0x0162, 0x0d},
 323         {0x0163, 0x78},
 324 };
 325
 326 static const struct imx219_reg mode_640_480_regs[] = {
 327         {0x0100, 0x00},
 328         {0x30eb, 0x05},
 329         {0x30eb, 0x0c},
 330         {0x300a, 0xff},
 331         {0x300b, 0xff},
 332         {0x30eb, 0x05},
 333         {0x30eb, 0x09},
 334         {0x0114, 0x01},
 335         {0x0128, 0x00},
 336         {0x012a, 0x18},
 337         {0x012b, 0x00},
 338         {0x0162, 0x0d},
 339         {0x0163, 0x78},
 340         {0x0164, 0x03},
 341         {0x0165, 0xe8},
 342         {0x0166, 0x08},
 343         {0x0167, 0xe7},
 344         {0x0168, 0x02},
 345         {0x0169, 0xf0},
 346         {0x016a, 0x06},
 347         {0x016b, 0xaf},
 348         {0x016c, 0x02},
 349         {0x016d, 0x80},
 350         {0x016e, 0x01},
 351         {0x016f, 0xe0},
 352         {0x0170, 0x01},
 353         {0x0171, 0x01},
 354         {0x0174, 0x03},
 355         {0x0175, 0x03},
 356         {0x0301, 0x05},
 357         {0x0303, 0x01},
 358         {0x0304, 0x03},
 359         {0x0305, 0x03},
 360         {0x0306, 0x00},
 361         {0x0307, 0x39},
 362         {0x030b, 0x01},
 363         {0x030c, 0x00},
 364         {0x030d, 0x72},
 365         {0x0624, 0x06},
 366         {0x0625, 0x68},
 367         {0x0626, 0x04},
 368         {0x0627, 0xd0},
 369         {0x455e, 0x00},
 370         {0x471e, 0x4b},
 371         {0x4767, 0x0f},
 372         {0x4750, 0x14},
 373         {0x4540, 0x00},
 374         {0x47b4, 0x14},
 375         {0x4713, 0x30},
 376         {0x478b, 0x10},
 377         {0x478f, 0x10},
 378         {0x4793, 0x10},
 379         {0x4797, 0x0e},
 380         {0x479b, 0x0e},
 381 };
 382
 383 static const struct imx219_reg raw8_framefmt_regs[] = {
 384         {0x018c, 0x08},
 385         {0x018d, 0x08},
 386         {0x0309, 0x08},
 387 };
 388
 389 static const struct imx219_reg raw10_framefmt_regs[] = {
 390         {0x018c, 0x0a},
 391         {0x018d, 0x0a},
 392         {0x0309, 0x0a},
 393 };
 394
 395 static const char * const imx219_test_pattern_menu[] = {
 396         "Disabled",
 397         "Color Bars",
 398         "Solid Color",
 399         "Grey Color Bars",
 400         "PN9"
 401 };
 402
 403 static const int imx219_test_pattern_val[] = {
 404         IMX219_TEST_PATTERN_DISABLE,
 405         IMX219_TEST_PATTERN_COLOR_BARS,
 406         IMX219_TEST_PATTERN_SOLID_COLOR,
 407         IMX219_TEST_PATTERN_GREY_COLOR,
 408         IMX219_TEST_PATTERN_PN9,
 409 };
 410
 411 /* regulator supplies */
 412 static const char * const imx219_supply_name[] = {
 413         /* Supplies can be enabled in any order */
 414         "VANA",  /* Analog (2.8V) supply */
 415         "VDIG",  /* Digital Core (1.8V) supply */
 416         "VDDL",  /* IF (1.2V) supply */
 417 };
 418
 419 #define IMX219_NUM_SUPPLIES ARRAY_SIZE(imx219_supply_name)
 420
 421 /*
 422  * The supported formats.
 423  * This table MUST contain 4 entries per format, to cover the various flip
 424  * combinations in the order
 425  * - no flip
 426  * - h flip
 427  * - v flip
 428  * - h&v flips
 429  */
 430 static const u32 codes[] = {
 431         MEDIA_BUS_FMT_SRGGB10_1X10,
 432         MEDIA_BUS_FMT_SGRBG10_1X10,
 433         MEDIA_BUS_FMT_SGBRG10_1X10,
 434         MEDIA_BUS_FMT_SBGGR10_1X10,
 435
 436         MEDIA_BUS_FMT_SRGGB8_1X8,
 437         MEDIA_BUS_FMT_SGRBG8_1X8,
 438         MEDIA_BUS_FMT_SGBRG8_1X8,
 439         MEDIA_BUS_FMT_SBGGR8_1X8,
 440 };
 441
 442 /*
 443  * Initialisation delay between XCLR low->high and the moment when the sensor
 444  * can start capture (i.e. can leave software stanby) must be not less than:
 445  *   t4 + max(t5, t6 + <time to initialize the sensor register over I2C>)
 446  * where
 447  *   t4 is fixed, and is max 200uS,
 448  *   t5 is fixed, and is 6000uS,
 449  *   t6 depends on the sensor external clock, and is max 32000 clock periods.
 450  * As per sensor datasheet, the external clock must be from 6MHz to 27MHz.
 451  * So for any acceptable external clock t6 is always within the range of
 452  * 1185 to 5333 uS, and is always less than t5.
 453  * For this reason this is always safe to wait (t4 + t5) = 6200 uS, then
 454  * initialize the sensor over I2C, and then exit the software standby.
 455  *
 456  * This start-up time can be optimized a bit more, if we start the writes
 457  * over I2C after (t4+t6), but before (t4+t5) expires. But then sensor
 458  * initialization over I2C may complete before (t4+t5) expires, and we must
 459  * ensure that capture is not started before (t4+t5).
 460  *
 461  * This delay doesn't account for the power supply startup time. If needed,
 462  * this should be taken care of via the regulator framework. E.g. in the
 463  * case of DT for regulator-fixed one should define the startup-delay-us
 464  * property.
 465  */
 466 #define IMX219_XCLR_MIN_DELAY_US        6200
 467 #define IMX219_XCLR_DELAY_RANGE_US      1000
 468
 469 /* Mode configs */
 470 static const struct imx219_mode supported_modes[] = {
 471         {
 472                 /* 8MPix 15fps mode */
 473                 .width = 3280,
 474                 .height = 2464,
 475                 .crop = {
 476                         .left = IMX219_PIXEL_ARRAY_LEFT,
 477                         .top = IMX219_PIXEL_ARRAY_TOP,
 478                         .width = 3280,
 479                         .height = 2464
 480                 },
 481                 .vts_def = IMX219_VTS_15FPS,
 482                 .reg_list = {
 483                         .num_of_regs = ARRAY_SIZE(mode_3280x2464_regs),
 484                         .regs = mode_3280x2464_regs,
 485                 },
 486         },
 487         {
 488                 /* 1080P 30fps cropped */
 489                 .width = 1920,
 490                 .height = 1080,
 491                 .crop = {
 492                         .left = 688,
 493                         .top = 700,
 494                         .width = 1920,
 495                         .height = 1080
 496                 },
 497                 .vts_def = IMX219_VTS_30FPS_1080P,
 498                 .reg_list = {
 499                         .num_of_regs = ARRAY_SIZE(mode_1920_1080_regs),
 500                         .regs = mode_1920_1080_regs,
 501                 },
 502         },
 503         {
 504                 /* 2x2 binned 30fps mode */
 505                 .width = 1640,
 506                 .height = 1232,
 507                 .crop = {
 508                         .left = IMX219_PIXEL_ARRAY_LEFT,
 509                         .top = IMX219_PIXEL_ARRAY_TOP,
 510                         .width = 3280,
 511                         .height = 2464
 512                 },
 513                 .vts_def = IMX219_VTS_30FPS_BINNED,
 514                 .reg_list = {
 515                         .num_of_regs = ARRAY_SIZE(mode_1640_1232_regs),
 516                         .regs = mode_1640_1232_regs,
 517                 },
 518         },
 519         {
 520                 /* 640x480 30fps mode */
 521                 .width = 640,
 522                 .height = 480,
 523                 .crop = {
 524                         .left = 1008,
 525                         .top = 760,
 526                         .width = 1280,
 527                         .height = 960
 528                 },
 529                 .vts_def = IMX219_VTS_30FPS_640x480,
 530                 .reg_list = {
 531                         .num_of_regs = ARRAY_SIZE(mode_640_480_regs),
 532                         .regs = mode_640_480_regs,
 533                 },
 534         },
 535 };
 536
 537 struct imx219 {
 538         struct v4l2_subdev sd;
 539         struct media_pad pad;
 540
 541         struct v4l2_mbus_framefmt fmt;
 542
 543         struct clk *xclk; /* system clock to IMX219 */
 544         u32 xclk_freq;
 545
 546         struct gpio_desc *reset_gpio;
 547         struct regulator_bulk_data supplies[IMX219_NUM_SUPPLIES];
 548
 549         struct v4l2_ctrl_handler ctrl_handler;
 550         /* V4L2 Controls */
 551         struct v4l2_ctrl *pixel_rate;
 552         struct v4l2_ctrl *exposure;
 553         struct v4l2_ctrl *vflip;
 554         struct v4l2_ctrl *hflip;
 555         struct v4l2_ctrl *vblank;
 556         struct v4l2_ctrl *hblank;
 557
 558         /* Current mode */
 559         const struct imx219_mode *mode;
 560
 561         /*
 562          * Mutex for serialized access:
 563          * Protect sensor module set pad format and start/stop streaming safely.
 564          */
 565         struct mutex mutex;
 566
 567         /* Streaming on/off */
 568         bool streaming;
 569 };
 570
 571 static inline struct imx219 *to_imx219(struct v4l2_subdev *_sd)
 572 {
 573         return container_of(_sd, struct imx219, sd);
 574 }
 575
 576 /* Read registers up to 2 at a time */
 577 static int imx219_read_reg(struct imx219 *imx219, u16 reg, u32 len, u32 *val)
 578 {
 579         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
 580         struct i2c_msg msgs[2];
 581         u8 addr_buf[2] = { reg >> 8, reg & 0xff };
 582         u8 data_buf[4] = { 0, };
 583         int ret;
 584
 585         if (len > 4)
 586                 return -EINVAL;
 587
 588         /* Write register address */
 589         msgs[0].addr = client->addr;
 590         msgs[0].flags = 0;
 591         msgs[0].len = ARRAY_SIZE(addr_buf);
 592         msgs[0].buf = addr_buf;
 593
 594         /* Read data from register */
 595         msgs[1].addr = client->addr;
 596         msgs[1].flags = I2C_M_RD;
 597         msgs[1].len = len;
 598         msgs[1].buf = &data_buf[4 - len];
 599
 600         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 601         if (ret != ARRAY_SIZE(msgs))
 602                 return -EIO;
 603
 604         *val = get_unaligned_be32(data_buf);
 605
 606         return 0;
 607 }
 608
 609 /* Write registers up to 2 at a time */
 610 static int imx219_write_reg(struct imx219 *imx219, u16 reg, u32 len, u32 val)
 611 {
 612         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
 613         u8 buf[6];
 614
 615         if (len > 4)
 616                 return -EINVAL;
 617
 618         put_unaligned_be16(reg, buf);
 619         put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
 620         if (i2c_master_send(client, buf, len + 2) != len + 2)
 621                 return -EIO;
 622
 623         return 0;
 624 }
 625
 626 /* Write a list of registers */
 627 static int imx219_write_regs(struct imx219 *imx219,
 628                              const struct imx219_reg *regs, u32 len)
 629 {
 630         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
 631         unsigned int i;
 632         int ret;
 633
 634         for (i = 0; i < len; i++) {
 635                 ret = imx219_write_reg(imx219, regs[i].address, 1, regs[i].val);
 636                 if (ret) {
 637                         dev_err_ratelimited(&client->dev,
 638                                             "Failed to write reg 0x%4.4x. error = %d\n",
 639                                             regs[i].address, ret);
 640
 641                         return ret;
 642                 }
 643         }
 644
 645         return 0;
 646 }
 647
 648 /* Get bayer order based on flip setting. */
 649 static u32 imx219_get_format_code(struct imx219 *imx219, u32 code)
 650 {
 651         unsigned int i;
 652
 653         lockdep_assert_held(&imx219->mutex);
 654
 655         for (i = 0; i < ARRAY_SIZE(codes); i++)
 656                 if (codes[i] == code)
 657                         break;
 658
 659         if (i >= ARRAY_SIZE(codes))
 660                 i = 0;
 661
 662         i = (i & ~3) | (imx219->vflip->val ? 2 : 0) |
 663             (imx219->hflip->val ? 1 : 0);
 664
 665         return codes[i];
 666 }
 667
 668 static void imx219_set_default_format(struct imx219 *imx219)
 669 {
 670         struct v4l2_mbus_framefmt *fmt;
 671
 672         fmt = &imx219->fmt;
 673         fmt->code = MEDIA_BUS_FMT_SRGGB10_1X10;
 674         fmt->colorspace = V4L2_COLORSPACE_SRGB;
 675         fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
 676         fmt->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
 677                                                           fmt->colorspace,
 678                                                           fmt->ycbcr_enc);
 679         fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
 680         fmt->width = supported_modes[0].width;
 681         fmt->height = supported_modes[0].height;
 682         fmt->field = V4L2_FIELD_NONE;
 683 }
 684
 685 static int imx219_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 686 {
 687         struct imx219 *imx219 = to_imx219(sd);
 688         struct v4l2_mbus_framefmt *try_fmt =
 689                 v4l2_subdev_get_try_format(sd, fh->pad, 0);
 690         struct v4l2_rect *try_crop;
 691
 692         mutex_lock(&imx219->mutex);
 693
 694         /* Initialize try_fmt */
 695         try_fmt->width = supported_modes[0].width;
 696         try_fmt->height = supported_modes[0].height;
 697         try_fmt->code = imx219_get_format_code(imx219,
 698                                                MEDIA_BUS_FMT_SRGGB10_1X10);
 699         try_fmt->field = V4L2_FIELD_NONE;
 700
 701         /* Initialize try_crop rectangle. */
 702         try_crop = v4l2_subdev_get_try_crop(sd, fh->pad, 0);
 703         try_crop->top = IMX219_PIXEL_ARRAY_TOP;
 704         try_crop->left = IMX219_PIXEL_ARRAY_LEFT;
 705         try_crop->width = IMX219_PIXEL_ARRAY_WIDTH;
 706         try_crop->height = IMX219_PIXEL_ARRAY_HEIGHT;
 707
 708         mutex_unlock(&imx219->mutex);
 709
 710         return 0;
 711 }
 712
 713 static int imx219_set_ctrl(struct v4l2_ctrl *ctrl)
 714 {
 715         struct imx219 *imx219 =
 716                 container_of(ctrl->handler, struct imx219, ctrl_handler);
 717         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
 718         int ret;
 719
 720         if (ctrl->id == V4L2_CID_VBLANK) {
 721                 int exposure_max, exposure_def;
 722
 723                 /* Update max exposure while meeting expected vblanking */
 724                 exposure_max = imx219->mode->height + ctrl->val - 4;
 725                 exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ?
 726                         exposure_max : IMX219_EXPOSURE_DEFAULT;
 727                 __v4l2_ctrl_modify_range(imx219->exposure,
 728                                          imx219->exposure->minimum,
 729                                          exposure_max, imx219->exposure->step,
 730                                          exposure_def);
 731         }
 732
 733         /*
 734          * Applying V4L2 control value only happens
 735          * when power is up for streaming
 736          */
 737         if (pm_runtime_get_if_in_use(&client->dev) == 0)
 738                 return 0;
 739
 740         switch (ctrl->id) {
 741         case V4L2_CID_ANALOGUE_GAIN:
 742                 ret = imx219_write_reg(imx219, IMX219_REG_ANALOG_GAIN,
 743                                        IMX219_REG_VALUE_08BIT, ctrl->val);
 744                 break;
 745         case V4L2_CID_EXPOSURE:
 746                 ret = imx219_write_reg(imx219, IMX219_REG_EXPOSURE,
 747                                        IMX219_REG_VALUE_16BIT, ctrl->val);
 748                 break;
 749         case V4L2_CID_DIGITAL_GAIN:
 750                 ret = imx219_write_reg(imx219, IMX219_REG_DIGITAL_GAIN,
 751                                        IMX219_REG_VALUE_16BIT, ctrl->val);
 752                 break;
 753         case V4L2_CID_TEST_PATTERN:
 754                 ret = imx219_write_reg(imx219, IMX219_REG_TEST_PATTERN,
 755                                        IMX219_REG_VALUE_16BIT,
 756                                        imx219_test_pattern_val[ctrl->val]);
 757                 break;
 758         case V4L2_CID_HFLIP:
 759         case V4L2_CID_VFLIP:
 760                 ret = imx219_write_reg(imx219, IMX219_REG_ORIENTATION, 1,
 761                                        imx219->hflip->val |
 762                                        imx219->vflip->val << 1);
 763                 break;
 764         case V4L2_CID_VBLANK:
 765                 ret = imx219_write_reg(imx219, IMX219_REG_VTS,
 766                                        IMX219_REG_VALUE_16BIT,
 767                                        imx219->mode->height + ctrl->val);
 768                 break;
 769         case V4L2_CID_TEST_PATTERN_RED:
 770                 ret = imx219_write_reg(imx219, IMX219_REG_TESTP_RED,
 771                                        IMX219_REG_VALUE_16BIT, ctrl->val);
 772                 break;
 773         case V4L2_CID_TEST_PATTERN_GREENR:
 774                 ret = imx219_write_reg(imx219, IMX219_REG_TESTP_GREENR,
 775                                        IMX219_REG_VALUE_16BIT, ctrl->val);
 776                 break;
 777         case V4L2_CID_TEST_PATTERN_BLUE:
 778                 ret = imx219_write_reg(imx219, IMX219_REG_TESTP_BLUE,
 779                                        IMX219_REG_VALUE_16BIT, ctrl->val);
 780                 break;
 781         case V4L2_CID_TEST_PATTERN_GREENB:
 782                 ret = imx219_write_reg(imx219, IMX219_REG_TESTP_GREENB,
 783                                        IMX219_REG_VALUE_16BIT, ctrl->val);
 784                 break;
 785         default:
 786                 dev_info(&client->dev,
 787                          "ctrl(id:0x%x,val:0x%x) is not handled\n",
 788                          ctrl->id, ctrl->val);
 789                 ret = -EINVAL;
 790                 break;
 791         }
 792
 793         pm_runtime_put(&client->dev);
 794
 795         return ret;
 796 }
 797
 798 static const struct v4l2_ctrl_ops imx219_ctrl_ops = {
 799         .s_ctrl = imx219_set_ctrl,
 800 };
 801
 802 static int imx219_enum_mbus_code(struct v4l2_subdev *sd,
 803                                  struct v4l2_subdev_pad_config *cfg,
 804                                  struct v4l2_subdev_mbus_code_enum *code)
 805 {
 806         struct imx219 *imx219 = to_imx219(sd);
 807
 808         if (code->index >= (ARRAY_SIZE(codes) / 4))
 809                 return -EINVAL;
 810
 811         code->code = imx219_get_format_code(imx219, codes[code->index * 4]);
 812
 813         return 0;
 814 }
 815
 816 static int imx219_enum_frame_size(struct v4l2_subdev *sd,
 817                                   struct v4l2_subdev_pad_config *cfg,
 818                                   struct v4l2_subdev_frame_size_enum *fse)
 819 {
 820         struct imx219 *imx219 = to_imx219(sd);
 821
 822         if (fse->index >= ARRAY_SIZE(supported_modes))
 823                 return -EINVAL;
 824
 825         if (fse->code != imx219_get_format_code(imx219, fse->code))
 826                 return -EINVAL;
 827
 828         fse->min_width = supported_modes[fse->index].width;
 829         fse->max_width = fse->min_width;
 830         fse->min_height = supported_modes[fse->index].height;
 831         fse->max_height = fse->min_height;
 832
 833         return 0;
 834 }
 835
 836 static void imx219_reset_colorspace(struct v4l2_mbus_framefmt *fmt)
 837 {
 838         fmt->colorspace = V4L2_COLORSPACE_SRGB;
 839         fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
 840         fmt->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
 841                                                           fmt->colorspace,
 842                                                           fmt->ycbcr_enc);
 843         fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
 844 }
 845
 846 static void imx219_update_pad_format(struct imx219 *imx219,
 847                                      const struct imx219_mode *mode,
 848                                      struct v4l2_subdev_format *fmt)
 849 {
 850         fmt->format.width = mode->width;
 851         fmt->format.height = mode->height;
 852         fmt->format.field = V4L2_FIELD_NONE;
 853         imx219_reset_colorspace(&fmt->format);
 854 }
 855
 856 static int __imx219_get_pad_format(struct imx219 *imx219,
 857                                    struct v4l2_subdev_pad_config *cfg,
 858                                    struct v4l2_subdev_format *fmt)
 859 {
 860         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 861                 struct v4l2_mbus_framefmt *try_fmt =
 862                         v4l2_subdev_get_try_format(&imx219->sd, cfg, fmt->pad);
 863                 /* update the code which could change due to vflip or hflip: */
 864                 try_fmt->code = imx219_get_format_code(imx219, try_fmt->code);
 865                 fmt->format = *try_fmt;
 866         } else {
 867                 imx219_update_pad_format(imx219, imx219->mode, fmt);
 868                 fmt->format.code = imx219_get_format_code(imx219,
 869                                                           imx219->fmt.code);
 870         }
 871
 872         return 0;
 873 }
 874
 875 static int imx219_get_pad_format(struct v4l2_subdev *sd,
 876                                  struct v4l2_subdev_pad_config *cfg,
 877                                  struct v4l2_subdev_format *fmt)
 878 {
 879         struct imx219 *imx219 = to_imx219(sd);
 880         int ret;
 881
 882         mutex_lock(&imx219->mutex);
 883         ret = __imx219_get_pad_format(imx219, cfg, fmt);
 884         mutex_unlock(&imx219->mutex);
 885
 886         return ret;
 887 }
 888
 889 static int imx219_set_pad_format(struct v4l2_subdev *sd,
 890                                  struct v4l2_subdev_pad_config *cfg,
 891                                  struct v4l2_subdev_format *fmt)
 892 {
 893         struct imx219 *imx219 = to_imx219(sd);
 894         const struct imx219_mode *mode;
 895         struct v4l2_mbus_framefmt *framefmt;
 896         int exposure_max, exposure_def, hblank;
 897         unsigned int i;
 898
 899         mutex_lock(&imx219->mutex);
 900
 901         for (i = 0; i < ARRAY_SIZE(codes); i++)
 902                 if (codes[i] == fmt->format.code)
 903                         break;
 904         if (i >= ARRAY_SIZE(codes))
 905                 i = 0;
 906
 907         /* Bayer order varies with flips */
 908         fmt->format.code = imx219_get_format_code(imx219, codes[i]);
 909
 910         mode = v4l2_find_nearest_size(supported_modes,
 911                                       ARRAY_SIZE(supported_modes),
 912                                       width, height,
 913                                       fmt->format.width, fmt->format.height);
 914         imx219_update_pad_format(imx219, mode, fmt);
 915         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 916                 framefmt = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
 917                 *framefmt = fmt->format;
 918         } else if (imx219->mode != mode ||
 919                    imx219->fmt.code != fmt->format.code) {
 920                 imx219->fmt = fmt->format;
 921                 imx219->mode = mode;
 922                 /* Update limits and set FPS to default */
 923                 __v4l2_ctrl_modify_range(imx219->vblank, IMX219_VBLANK_MIN,
 924                                          IMX219_VTS_MAX - mode->height, 1,
 925                                          mode->vts_def - mode->height);
 926                 __v4l2_ctrl_s_ctrl(imx219->vblank,
 927                                    mode->vts_def - mode->height);
 928                 /* Update max exposure while meeting expected vblanking */
 929                 exposure_max = mode->vts_def - 4;
 930                 exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ?
 931                         exposure_max : IMX219_EXPOSURE_DEFAULT;
 932                 __v4l2_ctrl_modify_range(imx219->exposure,
 933                                          imx219->exposure->minimum,
 934                                          exposure_max, imx219->exposure->step,
 935                                          exposure_def);
 936                 /*
 937                  * Currently PPL is fixed to IMX219_PPL_DEFAULT, so hblank
 938                  * depends on mode->width only, and is not changeble in any
 939                  * way other than changing the mode.
 940                  */
 941                 hblank = IMX219_PPL_DEFAULT - mode->width;
 942                 __v4l2_ctrl_modify_range(imx219->hblank, hblank, hblank, 1,
 943                                          hblank);
 944         }
 945
 946         mutex_unlock(&imx219->mutex);
 947
 948         return 0;
 949 }
 950
 951 static int imx219_set_framefmt(struct imx219 *imx219)
 952 {
 953         switch (imx219->fmt.code) {
 954         case MEDIA_BUS_FMT_SRGGB8_1X8:
 955         case MEDIA_BUS_FMT_SGRBG8_1X8:
 956         case MEDIA_BUS_FMT_SGBRG8_1X8:
 957         case MEDIA_BUS_FMT_SBGGR8_1X8:
 958                 return imx219_write_regs(imx219, raw8_framefmt_regs,
 959                                         ARRAY_SIZE(raw8_framefmt_regs));
 960
 961         case MEDIA_BUS_FMT_SRGGB10_1X10:
 962         case MEDIA_BUS_FMT_SGRBG10_1X10:
 963         case MEDIA_BUS_FMT_SGBRG10_1X10:
 964         case MEDIA_BUS_FMT_SBGGR10_1X10:
 965                 return imx219_write_regs(imx219, raw10_framefmt_regs,
 966                                         ARRAY_SIZE(raw10_framefmt_regs));
 967         }
 968
 969         return -EINVAL;
 970 }
 971
 972 static const struct v4l2_rect *
 973 __imx219_get_pad_crop(struct imx219 *imx219, struct v4l2_subdev_pad_config *cfg,
 974                       unsigned int pad, enum v4l2_subdev_format_whence which)
 975 {
 976         switch (which) {
 977         case V4L2_SUBDEV_FORMAT_TRY:
 978                 return v4l2_subdev_get_try_crop(&imx219->sd, cfg, pad);
 979         case V4L2_SUBDEV_FORMAT_ACTIVE:
 980                 return &imx219->mode->crop;
 981         }
 982
 983         return NULL;
 984 }
 985
 986 static int imx219_get_selection(struct v4l2_subdev *sd,
 987                                 struct v4l2_subdev_pad_config *cfg,
 988                                 struct v4l2_subdev_selection *sel)
 989 {
 990         switch (sel->target) {
 991         case V4L2_SEL_TGT_CROP: {
 992                 struct imx219 *imx219 = to_imx219(sd);
 993
 994                 mutex_lock(&imx219->mutex);
 995                 sel->r = *__imx219_get_pad_crop(imx219, cfg, sel->pad,
 996                                                 sel->which);
 997                 mutex_unlock(&imx219->mutex);
 998
 999                 return 0;
1000         }
1001
1002         case V4L2_SEL_TGT_NATIVE_SIZE:
1003                 sel->r.top = 0;
1004                 sel->r.left = 0;
1005                 sel->r.width = IMX219_NATIVE_WIDTH;
1006                 sel->r.height = IMX219_NATIVE_HEIGHT;
1007
1008                 return 0;
1009
1010         case V4L2_SEL_TGT_CROP_DEFAULT:
1011         case V4L2_SEL_TGT_CROP_BOUNDS:
1012                 sel->r.top = IMX219_PIXEL_ARRAY_TOP;
1013                 sel->r.left = IMX219_PIXEL_ARRAY_LEFT;
1014                 sel->r.width = IMX219_PIXEL_ARRAY_WIDTH;
1015                 sel->r.height = IMX219_PIXEL_ARRAY_HEIGHT;
1016
1017                 return 0;
1018         }
1019
1020         return -EINVAL;
1021 }
1022
1023 static int imx219_start_streaming(struct imx219 *imx219)
1024 {
1025         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1026         const struct imx219_reg_list *reg_list;
1027         int ret;
1028
1029         ret = pm_runtime_get_sync(&client->dev);
1030         if (ret < 0) {
1031                 pm_runtime_put_noidle(&client->dev);
1032                 return ret;
1033         }
1034
1035         /* Apply default values of current mode */
1036         reg_list = &imx219->mode->reg_list;
1037         ret = imx219_write_regs(imx219, reg_list->regs, reg_list->num_of_regs);
1038         if (ret) {
1039                 dev_err(&client->dev, "%s failed to set mode\n", __func__);
1040                 goto err_rpm_put;
1041         }
1042
1043         ret = imx219_set_framefmt(imx219);
1044         if (ret) {
1045                 dev_err(&client->dev, "%s failed to set frame format: %d\n",
1046                         __func__, ret);
1047                 goto err_rpm_put;
1048         }
1049
1050         /* Apply customized values from user */
1051         ret =  __v4l2_ctrl_handler_setup(imx219->sd.ctrl_handler);
1052         if (ret)
1053                 goto err_rpm_put;
1054
1055         /* set stream on register */
1056         ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
1057                                IMX219_REG_VALUE_08BIT, IMX219_MODE_STREAMING);
1058         if (ret)
1059                 goto err_rpm_put;
1060
1061         /* vflip and hflip cannot change during streaming */
1062         __v4l2_ctrl_grab(imx219->vflip, true);
1063         __v4l2_ctrl_grab(imx219->hflip, true);
1064
1065         return 0;
1066
1067 err_rpm_put:
1068         pm_runtime_put(&client->dev);
1069         return ret;
1070 }
1071
1072 static void imx219_stop_streaming(struct imx219 *imx219)
1073 {
1074         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1075         int ret;
1076
1077         /* set stream off register */
1078         ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
1079                                IMX219_REG_VALUE_08BIT, IMX219_MODE_STANDBY);
1080         if (ret)
1081                 dev_err(&client->dev, "%s failed to set stream\n", __func__);
1082
1083         __v4l2_ctrl_grab(imx219->vflip, false);
1084         __v4l2_ctrl_grab(imx219->hflip, false);
1085
1086         pm_runtime_put(&client->dev);
1087 }
1088
1089 static int imx219_set_stream(struct v4l2_subdev *sd, int enable)
1090 {
1091         struct imx219 *imx219 = to_imx219(sd);
1092         int ret = 0;
1093
1094         mutex_lock(&imx219->mutex);
1095         if (imx219->streaming == enable) {
1096                 mutex_unlock(&imx219->mutex);
1097                 return 0;
1098         }
1099
1100         if (enable) {
1101                 /*
1102                  * Apply default & customized values
1103                  * and then start streaming.
1104                  */
1105                 ret = imx219_start_streaming(imx219);
1106                 if (ret)
1107                         goto err_unlock;
1108         } else {
1109                 imx219_stop_streaming(imx219);
1110         }
1111
1112         imx219->streaming = enable;
1113
1114         mutex_unlock(&imx219->mutex);
1115
1116         return ret;
1117
1118 err_unlock:
1119         mutex_unlock(&imx219->mutex);
1120
1121         return ret;
1122 }
1123
1124 /* Power/clock management functions */
1125 static int imx219_power_on(struct device *dev)
1126 {
1127         struct i2c_client *client = to_i2c_client(dev);
1128         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1129         struct imx219 *imx219 = to_imx219(sd);
1130         int ret;
1131
1132         ret = regulator_bulk_enable(IMX219_NUM_SUPPLIES,
1133                                     imx219->supplies);
1134         if (ret) {
1135                 dev_err(&client->dev, "%s: failed to enable regulators\n",
1136                         __func__);
1137                 return ret;
1138         }
1139
1140         ret = clk_prepare_enable(imx219->xclk);
1141         if (ret) {
1142                 dev_err(&client->dev, "%s: failed to enable clock\n",
1143                         __func__);
1144                 goto reg_off;
1145         }
1146
1147         gpiod_set_value_cansleep(imx219->reset_gpio, 1);
1148         usleep_range(IMX219_XCLR_MIN_DELAY_US,
1149                      IMX219_XCLR_MIN_DELAY_US + IMX219_XCLR_DELAY_RANGE_US);
1150
1151         return 0;
1152
1153 reg_off:
1154         regulator_bulk_disable(IMX219_NUM_SUPPLIES, imx219->supplies);
1155
1156         return ret;
1157 }
1158
1159 static int imx219_power_off(struct device *dev)
1160 {
1161         struct i2c_client *client = to_i2c_client(dev);
1162         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1163         struct imx219 *imx219 = to_imx219(sd);
1164
1165         gpiod_set_value_cansleep(imx219->reset_gpio, 0);
1166         regulator_bulk_disable(IMX219_NUM_SUPPLIES, imx219->supplies);
1167         clk_disable_unprepare(imx219->xclk);
1168
1169         return 0;
1170 }
1171
1172 static int __maybe_unused imx219_suspend(struct device *dev)
1173 {
1174         struct i2c_client *client = to_i2c_client(dev);
1175         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1176         struct imx219 *imx219 = to_imx219(sd);
1177
1178         if (imx219->streaming)
1179                 imx219_stop_streaming(imx219);
1180
1181         return 0;
1182 }
1183
1184 static int __maybe_unused imx219_resume(struct device *dev)
1185 {
1186         struct i2c_client *client = to_i2c_client(dev);
1187         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1188         struct imx219 *imx219 = to_imx219(sd);
1189         int ret;
1190
1191         if (imx219->streaming) {
1192                 ret = imx219_start_streaming(imx219);
1193                 if (ret)
1194                         goto error;
1195         }
1196
1197         return 0;
1198
1199 error:
1200         imx219_stop_streaming(imx219);
1201         imx219->streaming = false;
1202
1203         return ret;
1204 }
1205
1206 static int imx219_get_regulators(struct imx219 *imx219)
1207 {
1208         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1209         unsigned int i;
1210
1211         for (i = 0; i < IMX219_NUM_SUPPLIES; i++)
1212                 imx219->supplies[i].supply = imx219_supply_name[i];
1213
1214         return devm_regulator_bulk_get(&client->dev,
1215                                        IMX219_NUM_SUPPLIES,
1216                                        imx219->supplies);
1217 }
1218
1219 /* Verify chip ID */
1220 static int imx219_identify_module(struct imx219 *imx219)
1221 {
1222         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1223         int ret;
1224         u32 val;
1225
1226         ret = imx219_read_reg(imx219, IMX219_REG_CHIP_ID,
1227                               IMX219_REG_VALUE_16BIT, &val);
1228         if (ret) {
1229                 dev_err(&client->dev, "failed to read chip id %x\n",
1230                         IMX219_CHIP_ID);
1231                 return ret;
1232         }
1233
1234         if (val != IMX219_CHIP_ID) {
1235                 dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
1236                         IMX219_CHIP_ID, val);
1237                 return -EIO;
1238         }
1239
1240         return 0;
1241 }
1242
1243 static const struct v4l2_subdev_core_ops imx219_core_ops = {
1244         .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
1245         .unsubscribe_event = v4l2_event_subdev_unsubscribe,
1246 };
1247
1248 static const struct v4l2_subdev_video_ops imx219_video_ops = {
1249         .s_stream = imx219_set_stream,
1250 };
1251
1252 static const struct v4l2_subdev_pad_ops imx219_pad_ops = {
1253         .enum_mbus_code = imx219_enum_mbus_code,
1254         .get_fmt = imx219_get_pad_format,
1255         .set_fmt = imx219_set_pad_format,
1256         .get_selection = imx219_get_selection,
1257         .enum_frame_size = imx219_enum_frame_size,
1258 };
1259
1260 static const struct v4l2_subdev_ops imx219_subdev_ops = {
1261         .core = &imx219_core_ops,
1262         .video = &imx219_video_ops,
1263         .pad = &imx219_pad_ops,
1264 };
1265
1266 static const struct v4l2_subdev_internal_ops imx219_internal_ops = {
1267         .open = imx219_open,
1268 };
1269
1270 /* Initialize control handlers */
1271 static int imx219_init_controls(struct imx219 *imx219)
1272 {
1273         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1274         struct v4l2_ctrl_handler *ctrl_hdlr;
1275         unsigned int height = imx219->mode->height;
1276         struct v4l2_fwnode_device_properties props;
1277         int exposure_max, exposure_def, hblank;
1278         int i, ret;
1279
1280         ctrl_hdlr = &imx219->ctrl_handler;
1281         ret = v4l2_ctrl_handler_init(ctrl_hdlr, 11);
1282         if (ret)
1283                 return ret;
1284
1285         mutex_init(&imx219->mutex);
1286         ctrl_hdlr->lock = &imx219->mutex;
1287
1288         /* By default, PIXEL_RATE is read only */
1289         imx219->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1290                                                V4L2_CID_PIXEL_RATE,
1291                                                IMX219_PIXEL_RATE,
1292                                                IMX219_PIXEL_RATE, 1,
1293                                                IMX219_PIXEL_RATE);
1294
1295         /* Initial vblank/hblank/exposure parameters based on current mode */
1296         imx219->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1297                                            V4L2_CID_VBLANK, IMX219_VBLANK_MIN,
1298                                            IMX219_VTS_MAX - height, 1,
1299                                            imx219->mode->vts_def - height);
1300         hblank = IMX219_PPL_DEFAULT - imx219->mode->width;
1301         imx219->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1302                                            V4L2_CID_HBLANK, hblank, hblank,
1303                                            1, hblank);
1304         if (imx219->hblank)
1305                 imx219->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1306         exposure_max = imx219->mode->vts_def - 4;
1307         exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ?
1308                 exposure_max : IMX219_EXPOSURE_DEFAULT;
1309         imx219->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1310                                              V4L2_CID_EXPOSURE,
1311                                              IMX219_EXPOSURE_MIN, exposure_max,
1312                                              IMX219_EXPOSURE_STEP,
1313                                              exposure_def);
1314
1315         v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
1316                           IMX219_ANA_GAIN_MIN, IMX219_ANA_GAIN_MAX,
1317                           IMX219_ANA_GAIN_STEP, IMX219_ANA_GAIN_DEFAULT);
1318
1319         v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
1320                           IMX219_DGTL_GAIN_MIN, IMX219_DGTL_GAIN_MAX,
1321                           IMX219_DGTL_GAIN_STEP, IMX219_DGTL_GAIN_DEFAULT);
1322
1323         imx219->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1324                                           V4L2_CID_HFLIP, 0, 1, 1, 0);
1325         if (imx219->hflip)
1326                 imx219->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
1327
1328         imx219->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1329                                           V4L2_CID_VFLIP, 0, 1, 1, 0);
1330         if (imx219->vflip)
1331                 imx219->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
1332
1333         v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx219_ctrl_ops,
1334                                      V4L2_CID_TEST_PATTERN,
1335                                      ARRAY_SIZE(imx219_test_pattern_menu) - 1,
1336                                      0, 0, imx219_test_pattern_menu);
1337         for (i = 0; i < 4; i++) {
1338                 /*
1339                  * The assumption is that
1340                  * V4L2_CID_TEST_PATTERN_GREENR == V4L2_CID_TEST_PATTERN_RED + 1
1341                  * V4L2_CID_TEST_PATTERN_BLUE   == V4L2_CID_TEST_PATTERN_RED + 2
1342                  * V4L2_CID_TEST_PATTERN_GREENB == V4L2_CID_TEST_PATTERN_RED + 3
1343                  */
1344                 v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1345                                   V4L2_CID_TEST_PATTERN_RED + i,
1346                                   IMX219_TESTP_COLOUR_MIN,
1347                                   IMX219_TESTP_COLOUR_MAX,
1348                                   IMX219_TESTP_COLOUR_STEP,
1349                                   IMX219_TESTP_COLOUR_MAX);
1350                 /* The "Solid color" pattern is white by default */
1351         }
1352
1353         if (ctrl_hdlr->error) {
1354                 ret = ctrl_hdlr->error;
1355                 dev_err(&client->dev, "%s control init failed (%d)\n",
1356                         __func__, ret);
1357                 goto error;
1358         }
1359
1360         ret = v4l2_fwnode_device_parse(&client->dev, &props);
1361         if (ret)
1362                 goto error;
1363
1364         ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &imx219_ctrl_ops,
1365                                               &props);
1366         if (ret)
1367                 goto error;
1368
1369         imx219->sd.ctrl_handler = ctrl_hdlr;
1370
1371         return 0;
1372
1373 error:
1374         v4l2_ctrl_handler_free(ctrl_hdlr);
1375         mutex_destroy(&imx219->mutex);
1376
1377         return ret;
1378 }
1379
1380 static void imx219_free_controls(struct imx219 *imx219)
1381 {
1382         v4l2_ctrl_handler_free(imx219->sd.ctrl_handler);
1383         mutex_destroy(&imx219->mutex);
1384 }
1385
1386 static int imx219_check_hwcfg(struct device *dev)
1387 {
1388         struct fwnode_handle *endpoint;
1389         struct v4l2_fwnode_endpoint ep_cfg = {
1390                 .bus_type = V4L2_MBUS_CSI2_DPHY
1391         };
1392         int ret = -EINVAL;
1393
1394         endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
1395         if (!endpoint) {
1396                 dev_err(dev, "endpoint node not found\n");
1397                 return -EINVAL;
1398         }
1399
1400         if (v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep_cfg)) {
1401                 dev_err(dev, "could not parse endpoint\n");
1402                 goto error_out;
1403         }
1404
1405         /* Check the number of MIPI CSI2 data lanes */
1406         if (ep_cfg.bus.mipi_csi2.num_data_lanes != 2) {
1407                 dev_err(dev, "only 2 data lanes are currently supported\n");
1408                 goto error_out;
1409         }
1410
1411         /* Check the link frequency set in device tree */
1412         if (!ep_cfg.nr_of_link_frequencies) {
1413                 dev_err(dev, "link-frequency property not found in DT\n");
1414                 goto error_out;
1415         }
1416
1417         if (ep_cfg.nr_of_link_frequencies != 1 ||
1418             ep_cfg.link_frequencies[0] != IMX219_DEFAULT_LINK_FREQ) {
1419                 dev_err(dev, "Link frequency not supported: %lld\n",
1420                         ep_cfg.link_frequencies[0]);
1421                 goto error_out;
1422         }
1423
1424         ret = 0;
1425
1426 error_out:
1427         v4l2_fwnode_endpoint_free(&ep_cfg);
1428         fwnode_handle_put(endpoint);
1429
1430         return ret;
1431 }
1432
1433 static int imx219_probe(struct i2c_client *client)
1434 {
1435         struct device *dev = &client->dev;
1436         struct imx219 *imx219;
1437         int ret;
1438
1439         imx219 = devm_kzalloc(&client->dev, sizeof(*imx219), GFP_KERNEL);
1440         if (!imx219)
1441                 return -ENOMEM;
1442
1443         v4l2_i2c_subdev_init(&imx219->sd, client, &imx219_subdev_ops);
1444
1445         /* Check the hardware configuration in device tree */
1446         if (imx219_check_hwcfg(dev))
1447                 return -EINVAL;
1448
1449         /* Get system clock (xclk) */
1450         imx219->xclk = devm_clk_get(dev, NULL);
1451         if (IS_ERR(imx219->xclk)) {
1452                 dev_err(dev, "failed to get xclk\n");
1453                 return PTR_ERR(imx219->xclk);
1454         }
1455
1456         imx219->xclk_freq = clk_get_rate(imx219->xclk);
1457         if (imx219->xclk_freq != IMX219_XCLK_FREQ) {
1458                 dev_err(dev, "xclk frequency not supported: %d Hz\n",
1459                         imx219->xclk_freq);
1460                 return -EINVAL;
1461         }
1462
1463         ret = imx219_get_regulators(imx219);
1464         if (ret) {
1465                 dev_err(dev, "failed to get regulators\n");
1466                 return ret;
1467         }
1468
1469         /* Request optional enable pin */
1470         imx219->reset_gpio = devm_gpiod_get_optional(dev, "reset",
1471                                                      GPIOD_OUT_HIGH);
1472
1473         /*
1474          * The sensor must be powered for imx219_identify_module()
1475          * to be able to read the CHIP_ID register
1476          */
1477         ret = imx219_power_on(dev);
1478         if (ret)
1479                 return ret;
1480
1481         ret = imx219_identify_module(imx219);
1482         if (ret)
1483                 goto error_power_off;
1484
1485         /* Set default mode to max resolution */
1486         imx219->mode = &supported_modes[0];
1487
1488         /* sensor doesn't enter LP-11 state upon power up until and unless
1489          * streaming is started, so upon power up switch the modes to:
1490          * streaming -> standby
1491          */
1492         ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
1493                                IMX219_REG_VALUE_08BIT, IMX219_MODE_STREAMING);
1494         if (ret < 0)
1495                 goto error_power_off;
1496         usleep_range(100, 110);
1497
1498         /* put sensor back to standby mode */
1499         ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
1500                                IMX219_REG_VALUE_08BIT, IMX219_MODE_STANDBY);
1501         if (ret < 0)
1502                 goto error_power_off;
1503         usleep_range(100, 110);
1504
1505         ret = imx219_init_controls(imx219);
1506         if (ret)
1507                 goto error_power_off;
1508
1509         /* Initialize subdev */
1510         imx219->sd.internal_ops = &imx219_internal_ops;
1511         imx219->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1512         imx219->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1513
1514         /* Initialize source pad */
1515         imx219->pad.flags = MEDIA_PAD_FL_SOURCE;
1516
1517         /* Initialize default format */
1518         imx219_set_default_format(imx219);
1519
1520         ret = media_entity_pads_init(&imx219->sd.entity, 1, &imx219->pad);
1521         if (ret) {
1522                 dev_err(dev, "failed to init entity pads: %d\n", ret);
1523                 goto error_handler_free;
1524         }
1525
1526         ret = v4l2_async_register_subdev_sensor_common(&imx219->sd);
1527         if (ret < 0) {
1528                 dev_err(dev, "failed to register sensor sub-device: %d\n", ret);
1529                 goto error_media_entity;
1530         }
1531
1532         /* Enable runtime PM and turn off the device */
1533         pm_runtime_set_active(dev);
1534         pm_runtime_enable(dev);
1535         pm_runtime_idle(dev);
1536
1537         return 0;
1538
1539 error_media_entity:
1540         media_entity_cleanup(&imx219->sd.entity);
1541
1542 error_handler_free:
1543         imx219_free_controls(imx219);
1544
1545 error_power_off:
1546         imx219_power_off(dev);
1547
1548         return ret;
1549 }
1550
1551 static int imx219_remove(struct i2c_client *client)
1552 {
1553         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1554         struct imx219 *imx219 = to_imx219(sd);
1555
1556         v4l2_async_unregister_subdev(sd);
1557         media_entity_cleanup(&sd->entity);
1558         imx219_free_controls(imx219);
1559
1560         pm_runtime_disable(&client->dev);
1561         if (!pm_runtime_status_suspended(&client->dev))
1562                 imx219_power_off(&client->dev);
1563         pm_runtime_set_suspended(&client->dev);
1564
1565         return 0;
1566 }
1567
1568 static const struct of_device_id imx219_dt_ids[] = {
1569         { .compatible = "sony,imx219" },
1570         { /* sentinel */ }
1571 };
1572 MODULE_DEVICE_TABLE(of, imx219_dt_ids);
1573
1574 static const struct dev_pm_ops imx219_pm_ops = {
1575         SET_SYSTEM_SLEEP_PM_OPS(imx219_suspend, imx219_resume)
1576         SET_RUNTIME_PM_OPS(imx219_power_off, imx219_power_on, NULL)
1577 };
1578
1579 static struct i2c_driver imx219_i2c_driver = {
1580         .driver = {
1581                 .name = "imx219",
1582                 .of_match_table = imx219_dt_ids,
1583                 .pm = &imx219_pm_ops,
1584         },
1585         .probe_new = imx219_probe,
1586         .remove = imx219_remove,
1587 };
1588
1589 module_i2c_driver(imx219_i2c_driver);
1590
1591 MODULE_AUTHOR("Dave Stevenson <dave.stevenson@raspberrypi.com");
1592 MODULE_DESCRIPTION("Sony IMX219 sensor driver");
1593 MODULE_LICENSE("GPL v2");