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 = 0,
 477                         .top = 0,
 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 = 680,
 493                         .top = 692,
 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 = 0,
 509                         .top = 0,
 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 = 1000,
 525                         .top = 752,
 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                 sel->r.top = IMX219_PIXEL_ARRAY_TOP;
1012                 sel->r.left = IMX219_PIXEL_ARRAY_LEFT;
1013                 sel->r.width = IMX219_PIXEL_ARRAY_WIDTH;
1014                 sel->r.height = IMX219_PIXEL_ARRAY_HEIGHT;
1015
1016                 return 0;
1017         }
1018
1019         return -EINVAL;
1020 }
1021
1022 static int imx219_start_streaming(struct imx219 *imx219)
1023 {
1024         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1025         const struct imx219_reg_list *reg_list;
1026         int ret;
1027
1028         /* Apply default values of current mode */
1029         reg_list = &imx219->mode->reg_list;
1030         ret = imx219_write_regs(imx219, reg_list->regs, reg_list->num_of_regs);
1031         if (ret) {
1032                 dev_err(&client->dev, "%s failed to set mode\n", __func__);
1033                 return ret;
1034         }
1035
1036         ret = imx219_set_framefmt(imx219);
1037         if (ret) {
1038                 dev_err(&client->dev, "%s failed to set frame format: %d\n",
1039                         __func__, ret);
1040                 return ret;
1041         }
1042
1043         /* Apply customized values from user */
1044         ret =  __v4l2_ctrl_handler_setup(imx219->sd.ctrl_handler);
1045         if (ret)
1046                 return ret;
1047
1048         /* set stream on register */
1049         return imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
1050                                 IMX219_REG_VALUE_08BIT, IMX219_MODE_STREAMING);
1051 }
1052
1053 static void imx219_stop_streaming(struct imx219 *imx219)
1054 {
1055         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1056         int ret;
1057
1058         /* set stream off register */
1059         ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
1060                                IMX219_REG_VALUE_08BIT, IMX219_MODE_STANDBY);
1061         if (ret)
1062                 dev_err(&client->dev, "%s failed to set stream\n", __func__);
1063 }
1064
1065 static int imx219_set_stream(struct v4l2_subdev *sd, int enable)
1066 {
1067         struct imx219 *imx219 = to_imx219(sd);
1068         struct i2c_client *client = v4l2_get_subdevdata(sd);
1069         int ret = 0;
1070
1071         mutex_lock(&imx219->mutex);
1072         if (imx219->streaming == enable) {
1073                 mutex_unlock(&imx219->mutex);
1074                 return 0;
1075         }
1076
1077         if (enable) {
1078                 ret = pm_runtime_get_sync(&client->dev);
1079                 if (ret < 0) {
1080                         pm_runtime_put_noidle(&client->dev);
1081                         goto err_unlock;
1082                 }
1083
1084                 /*
1085                  * Apply default & customized values
1086                  * and then start streaming.
1087                  */
1088                 ret = imx219_start_streaming(imx219);
1089                 if (ret)
1090                         goto err_rpm_put;
1091         } else {
1092                 imx219_stop_streaming(imx219);
1093                 pm_runtime_put(&client->dev);
1094         }
1095
1096         imx219->streaming = enable;
1097
1098         /* vflip and hflip cannot change during streaming */
1099         __v4l2_ctrl_grab(imx219->vflip, enable);
1100         __v4l2_ctrl_grab(imx219->hflip, enable);
1101
1102         mutex_unlock(&imx219->mutex);
1103
1104         return ret;
1105
1106 err_rpm_put:
1107         pm_runtime_put(&client->dev);
1108 err_unlock:
1109         mutex_unlock(&imx219->mutex);
1110
1111         return ret;
1112 }
1113
1114 /* Power/clock management functions */
1115 static int imx219_power_on(struct device *dev)
1116 {
1117         struct i2c_client *client = to_i2c_client(dev);
1118         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1119         struct imx219 *imx219 = to_imx219(sd);
1120         int ret;
1121
1122         ret = regulator_bulk_enable(IMX219_NUM_SUPPLIES,
1123                                     imx219->supplies);
1124         if (ret) {
1125                 dev_err(&client->dev, "%s: failed to enable regulators\n",
1126                         __func__);
1127                 return ret;
1128         }
1129
1130         ret = clk_prepare_enable(imx219->xclk);
1131         if (ret) {
1132                 dev_err(&client->dev, "%s: failed to enable clock\n",
1133                         __func__);
1134                 goto reg_off;
1135         }
1136
1137         gpiod_set_value_cansleep(imx219->reset_gpio, 1);
1138         usleep_range(IMX219_XCLR_MIN_DELAY_US,
1139                      IMX219_XCLR_MIN_DELAY_US + IMX219_XCLR_DELAY_RANGE_US);
1140
1141         return 0;
1142
1143 reg_off:
1144         regulator_bulk_disable(IMX219_NUM_SUPPLIES, imx219->supplies);
1145
1146         return ret;
1147 }
1148
1149 static int imx219_power_off(struct device *dev)
1150 {
1151         struct i2c_client *client = to_i2c_client(dev);
1152         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1153         struct imx219 *imx219 = to_imx219(sd);
1154
1155         gpiod_set_value_cansleep(imx219->reset_gpio, 0);
1156         regulator_bulk_disable(IMX219_NUM_SUPPLIES, imx219->supplies);
1157         clk_disable_unprepare(imx219->xclk);
1158
1159         return 0;
1160 }
1161
1162 static int __maybe_unused imx219_suspend(struct device *dev)
1163 {
1164         struct i2c_client *client = to_i2c_client(dev);
1165         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1166         struct imx219 *imx219 = to_imx219(sd);
1167
1168         if (imx219->streaming)
1169                 imx219_stop_streaming(imx219);
1170
1171         return 0;
1172 }
1173
1174 static int __maybe_unused imx219_resume(struct device *dev)
1175 {
1176         struct i2c_client *client = to_i2c_client(dev);
1177         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1178         struct imx219 *imx219 = to_imx219(sd);
1179         int ret;
1180
1181         if (imx219->streaming) {
1182                 ret = imx219_start_streaming(imx219);
1183                 if (ret)
1184                         goto error;
1185         }
1186
1187         return 0;
1188
1189 error:
1190         imx219_stop_streaming(imx219);
1191         imx219->streaming = 0;
1192
1193         return ret;
1194 }
1195
1196 static int imx219_get_regulators(struct imx219 *imx219)
1197 {
1198         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1199         unsigned int i;
1200
1201         for (i = 0; i < IMX219_NUM_SUPPLIES; i++)
1202                 imx219->supplies[i].supply = imx219_supply_name[i];
1203
1204         return devm_regulator_bulk_get(&client->dev,
1205                                        IMX219_NUM_SUPPLIES,
1206                                        imx219->supplies);
1207 }
1208
1209 /* Verify chip ID */
1210 static int imx219_identify_module(struct imx219 *imx219)
1211 {
1212         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1213         int ret;
1214         u32 val;
1215
1216         ret = imx219_read_reg(imx219, IMX219_REG_CHIP_ID,
1217                               IMX219_REG_VALUE_16BIT, &val);
1218         if (ret) {
1219                 dev_err(&client->dev, "failed to read chip id %x\n",
1220                         IMX219_CHIP_ID);
1221                 return ret;
1222         }
1223
1224         if (val != IMX219_CHIP_ID) {
1225                 dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
1226                         IMX219_CHIP_ID, val);
1227                 return -EIO;
1228         }
1229
1230         return 0;
1231 }
1232
1233 static const struct v4l2_subdev_core_ops imx219_core_ops = {
1234         .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
1235         .unsubscribe_event = v4l2_event_subdev_unsubscribe,
1236 };
1237
1238 static const struct v4l2_subdev_video_ops imx219_video_ops = {
1239         .s_stream = imx219_set_stream,
1240 };
1241
1242 static const struct v4l2_subdev_pad_ops imx219_pad_ops = {
1243         .enum_mbus_code = imx219_enum_mbus_code,
1244         .get_fmt = imx219_get_pad_format,
1245         .set_fmt = imx219_set_pad_format,
1246         .get_selection = imx219_get_selection,
1247         .enum_frame_size = imx219_enum_frame_size,
1248 };
1249
1250 static const struct v4l2_subdev_ops imx219_subdev_ops = {
1251         .core = &imx219_core_ops,
1252         .video = &imx219_video_ops,
1253         .pad = &imx219_pad_ops,
1254 };
1255
1256 static const struct v4l2_subdev_internal_ops imx219_internal_ops = {
1257         .open = imx219_open,
1258 };
1259
1260 /* Initialize control handlers */
1261 static int imx219_init_controls(struct imx219 *imx219)
1262 {
1263         struct i2c_client *client = v4l2_get_subdevdata(&imx219->sd);
1264         struct v4l2_ctrl_handler *ctrl_hdlr;
1265         unsigned int height = imx219->mode->height;
1266         struct v4l2_fwnode_device_properties props;
1267         int exposure_max, exposure_def, hblank;
1268         int i, ret;
1269
1270         ctrl_hdlr = &imx219->ctrl_handler;
1271         ret = v4l2_ctrl_handler_init(ctrl_hdlr, 11);
1272         if (ret)
1273                 return ret;
1274
1275         mutex_init(&imx219->mutex);
1276         ctrl_hdlr->lock = &imx219->mutex;
1277
1278         /* By default, PIXEL_RATE is read only */
1279         imx219->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1280                                                V4L2_CID_PIXEL_RATE,
1281                                                IMX219_PIXEL_RATE,
1282                                                IMX219_PIXEL_RATE, 1,
1283                                                IMX219_PIXEL_RATE);
1284
1285         /* Initial vblank/hblank/exposure parameters based on current mode */
1286         imx219->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1287                                            V4L2_CID_VBLANK, IMX219_VBLANK_MIN,
1288                                            IMX219_VTS_MAX - height, 1,
1289                                            imx219->mode->vts_def - height);
1290         hblank = IMX219_PPL_DEFAULT - imx219->mode->width;
1291         imx219->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1292                                            V4L2_CID_HBLANK, hblank, hblank,
1293                                            1, hblank);
1294         if (imx219->hblank)
1295                 imx219->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1296         exposure_max = imx219->mode->vts_def - 4;
1297         exposure_def = (exposure_max < IMX219_EXPOSURE_DEFAULT) ?
1298                 exposure_max : IMX219_EXPOSURE_DEFAULT;
1299         imx219->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1300                                              V4L2_CID_EXPOSURE,
1301                                              IMX219_EXPOSURE_MIN, exposure_max,
1302                                              IMX219_EXPOSURE_STEP,
1303                                              exposure_def);
1304
1305         v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
1306                           IMX219_ANA_GAIN_MIN, IMX219_ANA_GAIN_MAX,
1307                           IMX219_ANA_GAIN_STEP, IMX219_ANA_GAIN_DEFAULT);
1308
1309         v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
1310                           IMX219_DGTL_GAIN_MIN, IMX219_DGTL_GAIN_MAX,
1311                           IMX219_DGTL_GAIN_STEP, IMX219_DGTL_GAIN_DEFAULT);
1312
1313         imx219->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1314                                           V4L2_CID_HFLIP, 0, 1, 1, 0);
1315         if (imx219->hflip)
1316                 imx219->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
1317
1318         imx219->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1319                                           V4L2_CID_VFLIP, 0, 1, 1, 0);
1320         if (imx219->vflip)
1321                 imx219->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
1322
1323         v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx219_ctrl_ops,
1324                                      V4L2_CID_TEST_PATTERN,
1325                                      ARRAY_SIZE(imx219_test_pattern_menu) - 1,
1326                                      0, 0, imx219_test_pattern_menu);
1327         for (i = 0; i < 4; i++) {
1328                 /*
1329                  * The assumption is that
1330                  * V4L2_CID_TEST_PATTERN_GREENR == V4L2_CID_TEST_PATTERN_RED + 1
1331                  * V4L2_CID_TEST_PATTERN_BLUE   == V4L2_CID_TEST_PATTERN_RED + 2
1332                  * V4L2_CID_TEST_PATTERN_GREENB == V4L2_CID_TEST_PATTERN_RED + 3
1333                  */
1334                 v4l2_ctrl_new_std(ctrl_hdlr, &imx219_ctrl_ops,
1335                                   V4L2_CID_TEST_PATTERN_RED + i,
1336                                   IMX219_TESTP_COLOUR_MIN,
1337                                   IMX219_TESTP_COLOUR_MAX,
1338                                   IMX219_TESTP_COLOUR_STEP,
1339                                   IMX219_TESTP_COLOUR_MAX);
1340                 /* The "Solid color" pattern is white by default */
1341         }
1342
1343         if (ctrl_hdlr->error) {
1344                 ret = ctrl_hdlr->error;
1345                 dev_err(&client->dev, "%s control init failed (%d)\n",
1346                         __func__, ret);
1347                 goto error;
1348         }
1349
1350         ret = v4l2_fwnode_device_parse(&client->dev, &props);
1351         if (ret)
1352                 goto error;
1353
1354         ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &imx219_ctrl_ops,
1355                                               &props);
1356         if (ret)
1357                 goto error;
1358
1359         imx219->sd.ctrl_handler = ctrl_hdlr;
1360
1361         return 0;
1362
1363 error:
1364         v4l2_ctrl_handler_free(ctrl_hdlr);
1365         mutex_destroy(&imx219->mutex);
1366
1367         return ret;
1368 }
1369
1370 static void imx219_free_controls(struct imx219 *imx219)
1371 {
1372         v4l2_ctrl_handler_free(imx219->sd.ctrl_handler);
1373         mutex_destroy(&imx219->mutex);
1374 }
1375
1376 static int imx219_check_hwcfg(struct device *dev)
1377 {
1378         struct fwnode_handle *endpoint;
1379         struct v4l2_fwnode_endpoint ep_cfg = {
1380                 .bus_type = V4L2_MBUS_CSI2_DPHY
1381         };
1382         int ret = -EINVAL;
1383
1384         endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
1385         if (!endpoint) {
1386                 dev_err(dev, "endpoint node not found\n");
1387                 return -EINVAL;
1388         }
1389
1390         if (v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep_cfg)) {
1391                 dev_err(dev, "could not parse endpoint\n");
1392                 goto error_out;
1393         }
1394
1395         /* Check the number of MIPI CSI2 data lanes */
1396         if (ep_cfg.bus.mipi_csi2.num_data_lanes != 2) {
1397                 dev_err(dev, "only 2 data lanes are currently supported\n");
1398                 goto error_out;
1399         }
1400
1401         /* Check the link frequency set in device tree */
1402         if (!ep_cfg.nr_of_link_frequencies) {
1403                 dev_err(dev, "link-frequency property not found in DT\n");
1404                 goto error_out;
1405         }
1406
1407         if (ep_cfg.nr_of_link_frequencies != 1 ||
1408             ep_cfg.link_frequencies[0] != IMX219_DEFAULT_LINK_FREQ) {
1409                 dev_err(dev, "Link frequency not supported: %lld\n",
1410                         ep_cfg.link_frequencies[0]);
1411                 goto error_out;
1412         }
1413
1414         ret = 0;
1415
1416 error_out:
1417         v4l2_fwnode_endpoint_free(&ep_cfg);
1418         fwnode_handle_put(endpoint);
1419
1420         return ret;
1421 }
1422
1423 static int imx219_probe(struct i2c_client *client)
1424 {
1425         struct device *dev = &client->dev;
1426         struct imx219 *imx219;
1427         int ret;
1428
1429         imx219 = devm_kzalloc(&client->dev, sizeof(*imx219), GFP_KERNEL);
1430         if (!imx219)
1431                 return -ENOMEM;
1432
1433         v4l2_i2c_subdev_init(&imx219->sd, client, &imx219_subdev_ops);
1434
1435         /* Check the hardware configuration in device tree */
1436         if (imx219_check_hwcfg(dev))
1437                 return -EINVAL;
1438
1439         /* Get system clock (xclk) */
1440         imx219->xclk = devm_clk_get(dev, NULL);
1441         if (IS_ERR(imx219->xclk)) {
1442                 dev_err(dev, "failed to get xclk\n");
1443                 return PTR_ERR(imx219->xclk);
1444         }
1445
1446         imx219->xclk_freq = clk_get_rate(imx219->xclk);
1447         if (imx219->xclk_freq != IMX219_XCLK_FREQ) {
1448                 dev_err(dev, "xclk frequency not supported: %d Hz\n",
1449                         imx219->xclk_freq);
1450                 return -EINVAL;
1451         }
1452
1453         ret = imx219_get_regulators(imx219);
1454         if (ret) {
1455                 dev_err(dev, "failed to get regulators\n");
1456                 return ret;
1457         }
1458
1459         /* Request optional enable pin */
1460         imx219->reset_gpio = devm_gpiod_get_optional(dev, "reset",
1461                                                      GPIOD_OUT_HIGH);
1462
1463         /*
1464          * The sensor must be powered for imx219_identify_module()
1465          * to be able to read the CHIP_ID register
1466          */
1467         ret = imx219_power_on(dev);
1468         if (ret)
1469                 return ret;
1470
1471         ret = imx219_identify_module(imx219);
1472         if (ret)
1473                 goto error_power_off;
1474
1475         /* Set default mode to max resolution */
1476         imx219->mode = &supported_modes[0];
1477
1478         /* sensor doesn't enter LP-11 state upon power up until and unless
1479          * streaming is started, so upon power up switch the modes to:
1480          * streaming -> standby
1481          */
1482         ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
1483                                IMX219_REG_VALUE_08BIT, IMX219_MODE_STREAMING);
1484         if (ret < 0)
1485                 goto error_power_off;
1486         usleep_range(100, 110);
1487
1488         /* put sensor back to standby mode */
1489         ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
1490                                IMX219_REG_VALUE_08BIT, IMX219_MODE_STANDBY);
1491         if (ret < 0)
1492                 goto error_power_off;
1493         usleep_range(100, 110);
1494
1495         ret = imx219_init_controls(imx219);
1496         if (ret)
1497                 goto error_power_off;
1498
1499         /* Initialize subdev */
1500         imx219->sd.internal_ops = &imx219_internal_ops;
1501         imx219->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1502         imx219->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1503
1504         /* Initialize source pad */
1505         imx219->pad.flags = MEDIA_PAD_FL_SOURCE;
1506
1507         /* Initialize default format */
1508         imx219_set_default_format(imx219);
1509
1510         ret = media_entity_pads_init(&imx219->sd.entity, 1, &imx219->pad);
1511         if (ret) {
1512                 dev_err(dev, "failed to init entity pads: %d\n", ret);
1513                 goto error_handler_free;
1514         }
1515
1516         ret = v4l2_async_register_subdev_sensor_common(&imx219->sd);
1517         if (ret < 0) {
1518                 dev_err(dev, "failed to register sensor sub-device: %d\n", ret);
1519                 goto error_media_entity;
1520         }
1521
1522         /* Enable runtime PM and turn off the device */
1523         pm_runtime_set_active(dev);
1524         pm_runtime_enable(dev);
1525         pm_runtime_idle(dev);
1526
1527         return 0;
1528
1529 error_media_entity:
1530         media_entity_cleanup(&imx219->sd.entity);
1531
1532 error_handler_free:
1533         imx219_free_controls(imx219);
1534
1535 error_power_off:
1536         imx219_power_off(dev);
1537
1538         return ret;
1539 }
1540
1541 static int imx219_remove(struct i2c_client *client)
1542 {
1543         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1544         struct imx219 *imx219 = to_imx219(sd);
1545
1546         v4l2_async_unregister_subdev(sd);
1547         media_entity_cleanup(&sd->entity);
1548         imx219_free_controls(imx219);
1549
1550         pm_runtime_disable(&client->dev);
1551         if (!pm_runtime_status_suspended(&client->dev))
1552                 imx219_power_off(&client->dev);
1553         pm_runtime_set_suspended(&client->dev);
1554
1555         return 0;
1556 }
1557
1558 static const struct of_device_id imx219_dt_ids[] = {
1559         { .compatible = "sony,imx219" },
1560         { /* sentinel */ }
1561 };
1562 MODULE_DEVICE_TABLE(of, imx219_dt_ids);
1563
1564 static const struct dev_pm_ops imx219_pm_ops = {
1565         SET_SYSTEM_SLEEP_PM_OPS(imx219_suspend, imx219_resume)
1566         SET_RUNTIME_PM_OPS(imx219_power_off, imx219_power_on, NULL)
1567 };
1568
1569 static struct i2c_driver imx219_i2c_driver = {
1570         .driver = {
1571                 .name = "imx219",
1572                 .of_match_table = imx219_dt_ids,
1573                 .pm = &imx219_pm_ops,
1574         },
1575         .probe_new = imx219_probe,
1576         .remove = imx219_remove,
1577 };
1578
1579 module_i2c_driver(imx219_i2c_driver);
1580
1581 MODULE_AUTHOR("Dave Stevenson <dave.stevenson@raspberrypi.com");
1582 MODULE_DESCRIPTION("Sony IMX219 sensor driver");
1583 MODULE_LICENSE("GPL v2");