drivers/media/i2c/ov5647.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * A V4L2 driver for OmniVision OV5647 cameras.
   4  *
   5  * Based on Samsung S5K6AAFX SXGA 1/6" 1.3M CMOS Image Sensor driver
   6  * Copyright (C) 2011 Sylwester Nawrocki <[email protected]>
   7  *
   8  * Based on Omnivision OV7670 Camera Driver
   9  * Copyright (C) 2006-7 Jonathan Corbet <[email protected]>
  10  *
  11  * Copyright (C) 2016, Synopsys, Inc.
  12  */
  13
  14 #include <linux/clk.h>
  15 #include <linux/delay.h>
  16 #include <linux/gpio/consumer.h>
  17 #include <linux/i2c.h>
  18 #include <linux/init.h>
  19 #include <linux/io.h>
  20 #include <linux/module.h>
  21 #include <linux/of_graph.h>
  22 #include <linux/pm_runtime.h>
  23 #include <linux/slab.h>
  24 #include <linux/videodev2.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-device.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-fwnode.h>
  29 #include <media/v4l2-image-sizes.h>
  30 #include <media/v4l2-mediabus.h>
  31
  32 /*
  33  * From the datasheet, "20ms after PWDN goes low or 20ms after RESETB goes
  34  * high if reset is inserted after PWDN goes high, host can access sensor's
  35  * SCCB to initialize sensor."
  36  */
  37 #define PWDN_ACTIVE_DELAY_MS    20
  38
  39 #define MIPI_CTRL00_CLOCK_LANE_GATE             BIT(5)
  40 #define MIPI_CTRL00_LINE_SYNC_ENABLE            BIT(4)
  41 #define MIPI_CTRL00_BUS_IDLE                    BIT(2)
  42 #define MIPI_CTRL00_CLOCK_LANE_DISABLE          BIT(0)
  43
  44 #define OV5647_SW_STANDBY               0x0100
  45 #define OV5647_SW_RESET                 0x0103
  46 #define OV5647_REG_CHIPID_H             0x300a
  47 #define OV5647_REG_CHIPID_L             0x300b
  48 #define OV5640_REG_PAD_OUT              0x300d
  49 #define OV5647_REG_EXP_HI               0x3500
  50 #define OV5647_REG_EXP_MID              0x3501
  51 #define OV5647_REG_EXP_LO               0x3502
  52 #define OV5647_REG_AEC_AGC              0x3503
  53 #define OV5647_REG_GAIN_HI              0x350a
  54 #define OV5647_REG_GAIN_LO              0x350b
  55 #define OV5647_REG_VTS_HI               0x380e
  56 #define OV5647_REG_VTS_LO               0x380f
  57 #define OV5647_REG_FRAME_OFF_NUMBER     0x4202
  58 #define OV5647_REG_MIPI_CTRL00          0x4800
  59 #define OV5647_REG_MIPI_CTRL14          0x4814
  60 #define OV5647_REG_AWB                  0x5001
  61 #define OV5647_REG_ISPCTRL3D            0x503d
  62
  63 #define REG_TERM 0xfffe
  64 #define VAL_TERM 0xfe
  65 #define REG_DLY  0xffff
  66
  67 /* OV5647 native and active pixel array size */
  68 #define OV5647_NATIVE_WIDTH             2624U
  69 #define OV5647_NATIVE_HEIGHT            1956U
  70
  71 #define OV5647_PIXEL_ARRAY_LEFT         16U
  72 #define OV5647_PIXEL_ARRAY_TOP          16U
  73 #define OV5647_PIXEL_ARRAY_WIDTH        2592U
  74 #define OV5647_PIXEL_ARRAY_HEIGHT       1944U
  75
  76 #define OV5647_VBLANK_MIN               4
  77 #define OV5647_VTS_MAX                  32767
  78
  79 #define OV5647_EXPOSURE_MIN             4
  80 #define OV5647_EXPOSURE_STEP            1
  81 #define OV5647_EXPOSURE_DEFAULT         1000
  82 #define OV5647_EXPOSURE_MAX             65535
  83
  84 struct regval_list {
  85         u16 addr;
  86         u8 data;
  87 };
  88
  89 struct ov5647_mode {
  90         struct v4l2_mbus_framefmt       format;
  91         struct v4l2_rect                crop;
  92         u64                             pixel_rate;
  93         int                             hts;
  94         int                             vts;
  95         const struct regval_list        *reg_list;
  96         unsigned int                    num_regs;
  97 };
  98
  99 struct ov5647 {
 100         struct v4l2_subdev              sd;
 101         struct media_pad                pad;
 102         struct mutex                    lock;
 103         struct clk                      *xclk;
 104         struct gpio_desc                *pwdn;
 105         bool                            clock_ncont;
 106         struct v4l2_ctrl_handler        ctrls;
 107         const struct ov5647_mode        *mode;
 108         struct v4l2_ctrl                *pixel_rate;
 109         struct v4l2_ctrl                *hblank;
 110         struct v4l2_ctrl                *vblank;
 111         struct v4l2_ctrl                *exposure;
 112 };
 113
 114 static inline struct ov5647 *to_sensor(struct v4l2_subdev *sd)
 115 {
 116         return container_of(sd, struct ov5647, sd);
 117 }
 118
 119 static const char * const ov5647_test_pattern_menu[] = {
 120         "Disabled",
 121         "Color Bars",
 122         "Color Squares",
 123         "Random Data",
 124 };
 125
 126 static const u8 ov5647_test_pattern_val[] = {
 127         0x00,   /* Disabled */
 128         0x80,   /* Color Bars */
 129         0x82,   /* Color Squares */
 130         0x81,   /* Random Data */
 131 };
 132
 133 static const struct regval_list sensor_oe_disable_regs[] = {
 134         {0x3000, 0x00},
 135         {0x3001, 0x00},
 136         {0x3002, 0x00},
 137 };
 138
 139 static const struct regval_list sensor_oe_enable_regs[] = {
 140         {0x3000, 0x0f},
 141         {0x3001, 0xff},
 142         {0x3002, 0xe4},
 143 };
 144
 145 static struct regval_list ov5647_2592x1944_10bpp[] = {
 146         {0x0100, 0x00},
 147         {0x0103, 0x01},
 148         {0x3034, 0x1a},
 149         {0x3035, 0x21},
 150         {0x3036, 0x69},
 151         {0x303c, 0x11},
 152         {0x3106, 0xf5},
 153         {0x3821, 0x06},
 154         {0x3820, 0x00},
 155         {0x3827, 0xec},
 156         {0x370c, 0x03},
 157         {0x3612, 0x5b},
 158         {0x3618, 0x04},
 159         {0x5000, 0x06},
 160         {0x5002, 0x41},
 161         {0x5003, 0x08},
 162         {0x5a00, 0x08},
 163         {0x3000, 0x00},
 164         {0x3001, 0x00},
 165         {0x3002, 0x00},
 166         {0x3016, 0x08},
 167         {0x3017, 0xe0},
 168         {0x3018, 0x44},
 169         {0x301c, 0xf8},
 170         {0x301d, 0xf0},
 171         {0x3a18, 0x00},
 172         {0x3a19, 0xf8},
 173         {0x3c01, 0x80},
 174         {0x3b07, 0x0c},
 175         {0x380c, 0x0b},
 176         {0x380d, 0x1c},
 177         {0x3814, 0x11},
 178         {0x3815, 0x11},
 179         {0x3708, 0x64},
 180         {0x3709, 0x12},
 181         {0x3808, 0x0a},
 182         {0x3809, 0x20},
 183         {0x380a, 0x07},
 184         {0x380b, 0x98},
 185         {0x3800, 0x00},
 186         {0x3801, 0x00},
 187         {0x3802, 0x00},
 188         {0x3803, 0x00},
 189         {0x3804, 0x0a},
 190         {0x3805, 0x3f},
 191         {0x3806, 0x07},
 192         {0x3807, 0xa3},
 193         {0x3811, 0x10},
 194         {0x3813, 0x06},
 195         {0x3630, 0x2e},
 196         {0x3632, 0xe2},
 197         {0x3633, 0x23},
 198         {0x3634, 0x44},
 199         {0x3636, 0x06},
 200         {0x3620, 0x64},
 201         {0x3621, 0xe0},
 202         {0x3600, 0x37},
 203         {0x3704, 0xa0},
 204         {0x3703, 0x5a},
 205         {0x3715, 0x78},
 206         {0x3717, 0x01},
 207         {0x3731, 0x02},
 208         {0x370b, 0x60},
 209         {0x3705, 0x1a},
 210         {0x3f05, 0x02},
 211         {0x3f06, 0x10},
 212         {0x3f01, 0x0a},
 213         {0x3a08, 0x01},
 214         {0x3a09, 0x28},
 215         {0x3a0a, 0x00},
 216         {0x3a0b, 0xf6},
 217         {0x3a0d, 0x08},
 218         {0x3a0e, 0x06},
 219         {0x3a0f, 0x58},
 220         {0x3a10, 0x50},
 221         {0x3a1b, 0x58},
 222         {0x3a1e, 0x50},
 223         {0x3a11, 0x60},
 224         {0x3a1f, 0x28},
 225         {0x4001, 0x02},
 226         {0x4004, 0x04},
 227         {0x4000, 0x09},
 228         {0x4837, 0x19},
 229         {0x4800, 0x24},
 230         {0x3503, 0x03},
 231         {0x0100, 0x01},
 232 };
 233
 234 static struct regval_list ov5647_1080p30_10bpp[] = {
 235         {0x0100, 0x00},
 236         {0x0103, 0x01},
 237         {0x3034, 0x1a},
 238         {0x3035, 0x21},
 239         {0x3036, 0x62},
 240         {0x303c, 0x11},
 241         {0x3106, 0xf5},
 242         {0x3821, 0x06},
 243         {0x3820, 0x00},
 244         {0x3827, 0xec},
 245         {0x370c, 0x03},
 246         {0x3612, 0x5b},
 247         {0x3618, 0x04},
 248         {0x5000, 0x06},
 249         {0x5002, 0x41},
 250         {0x5003, 0x08},
 251         {0x5a00, 0x08},
 252         {0x3000, 0x00},
 253         {0x3001, 0x00},
 254         {0x3002, 0x00},
 255         {0x3016, 0x08},
 256         {0x3017, 0xe0},
 257         {0x3018, 0x44},
 258         {0x301c, 0xf8},
 259         {0x301d, 0xf0},
 260         {0x3a18, 0x00},
 261         {0x3a19, 0xf8},
 262         {0x3c01, 0x80},
 263         {0x3b07, 0x0c},
 264         {0x380c, 0x09},
 265         {0x380d, 0x70},
 266         {0x3814, 0x11},
 267         {0x3815, 0x11},
 268         {0x3708, 0x64},
 269         {0x3709, 0x12},
 270         {0x3808, 0x07},
 271         {0x3809, 0x80},
 272         {0x380a, 0x04},
 273         {0x380b, 0x38},
 274         {0x3800, 0x01},
 275         {0x3801, 0x5c},
 276         {0x3802, 0x01},
 277         {0x3803, 0xb2},
 278         {0x3804, 0x08},
 279         {0x3805, 0xe3},
 280         {0x3806, 0x05},
 281         {0x3807, 0xf1},
 282         {0x3811, 0x04},
 283         {0x3813, 0x02},
 284         {0x3630, 0x2e},
 285         {0x3632, 0xe2},
 286         {0x3633, 0x23},
 287         {0x3634, 0x44},
 288         {0x3636, 0x06},
 289         {0x3620, 0x64},
 290         {0x3621, 0xe0},
 291         {0x3600, 0x37},
 292         {0x3704, 0xa0},
 293         {0x3703, 0x5a},
 294         {0x3715, 0x78},
 295         {0x3717, 0x01},
 296         {0x3731, 0x02},
 297         {0x370b, 0x60},
 298         {0x3705, 0x1a},
 299         {0x3f05, 0x02},
 300         {0x3f06, 0x10},
 301         {0x3f01, 0x0a},
 302         {0x3a08, 0x01},
 303         {0x3a09, 0x4b},
 304         {0x3a0a, 0x01},
 305         {0x3a0b, 0x13},
 306         {0x3a0d, 0x04},
 307         {0x3a0e, 0x03},
 308         {0x3a0f, 0x58},
 309         {0x3a10, 0x50},
 310         {0x3a1b, 0x58},
 311         {0x3a1e, 0x50},
 312         {0x3a11, 0x60},
 313         {0x3a1f, 0x28},
 314         {0x4001, 0x02},
 315         {0x4004, 0x04},
 316         {0x4000, 0x09},
 317         {0x4837, 0x19},
 318         {0x4800, 0x34},
 319         {0x3503, 0x03},
 320         {0x0100, 0x01},
 321 };
 322
 323 static struct regval_list ov5647_2x2binned_10bpp[] = {
 324         {0x0100, 0x00},
 325         {0x0103, 0x01},
 326         {0x3034, 0x1a},
 327         {0x3035, 0x21},
 328         {0x3036, 0x62},
 329         {0x303c, 0x11},
 330         {0x3106, 0xf5},
 331         {0x3827, 0xec},
 332         {0x370c, 0x03},
 333         {0x3612, 0x59},
 334         {0x3618, 0x00},
 335         {0x5000, 0x06},
 336         {0x5002, 0x41},
 337         {0x5003, 0x08},
 338         {0x5a00, 0x08},
 339         {0x3000, 0x00},
 340         {0x3001, 0x00},
 341         {0x3002, 0x00},
 342         {0x3016, 0x08},
 343         {0x3017, 0xe0},
 344         {0x3018, 0x44},
 345         {0x301c, 0xf8},
 346         {0x301d, 0xf0},
 347         {0x3a18, 0x00},
 348         {0x3a19, 0xf8},
 349         {0x3c01, 0x80},
 350         {0x3b07, 0x0c},
 351         {0x3800, 0x00},
 352         {0x3801, 0x00},
 353         {0x3802, 0x00},
 354         {0x3803, 0x00},
 355         {0x3804, 0x0a},
 356         {0x3805, 0x3f},
 357         {0x3806, 0x07},
 358         {0x3807, 0xa3},
 359         {0x3808, 0x05},
 360         {0x3809, 0x10},
 361         {0x380a, 0x03},
 362         {0x380b, 0xcc},
 363         {0x380c, 0x07},
 364         {0x380d, 0x68},
 365         {0x3811, 0x0c},
 366         {0x3813, 0x06},
 367         {0x3814, 0x31},
 368         {0x3815, 0x31},
 369         {0x3630, 0x2e},
 370         {0x3632, 0xe2},
 371         {0x3633, 0x23},
 372         {0x3634, 0x44},
 373         {0x3636, 0x06},
 374         {0x3620, 0x64},
 375         {0x3621, 0xe0},
 376         {0x3600, 0x37},
 377         {0x3704, 0xa0},
 378         {0x3703, 0x5a},
 379         {0x3715, 0x78},
 380         {0x3717, 0x01},
 381         {0x3731, 0x02},
 382         {0x370b, 0x60},
 383         {0x3705, 0x1a},
 384         {0x3f05, 0x02},
 385         {0x3f06, 0x10},
 386         {0x3f01, 0x0a},
 387         {0x3a08, 0x01},
 388         {0x3a09, 0x28},
 389         {0x3a0a, 0x00},
 390         {0x3a0b, 0xf6},
 391         {0x3a0d, 0x08},
 392         {0x3a0e, 0x06},
 393         {0x3a0f, 0x58},
 394         {0x3a10, 0x50},
 395         {0x3a1b, 0x58},
 396         {0x3a1e, 0x50},
 397         {0x3a11, 0x60},
 398         {0x3a1f, 0x28},
 399         {0x4001, 0x02},
 400         {0x4004, 0x04},
 401         {0x4000, 0x09},
 402         {0x4837, 0x16},
 403         {0x4800, 0x24},
 404         {0x3503, 0x03},
 405         {0x3820, 0x41},
 406         {0x3821, 0x07},
 407         {0x350a, 0x00},
 408         {0x350b, 0x10},
 409         {0x3500, 0x00},
 410         {0x3501, 0x1a},
 411         {0x3502, 0xf0},
 412         {0x3212, 0xa0},
 413         {0x0100, 0x01},
 414 };
 415
 416 static struct regval_list ov5647_640x480_10bpp[] = {
 417         {0x0100, 0x00},
 418         {0x0103, 0x01},
 419         {0x3035, 0x11},
 420         {0x3036, 0x46},
 421         {0x303c, 0x11},
 422         {0x3821, 0x07},
 423         {0x3820, 0x41},
 424         {0x370c, 0x03},
 425         {0x3612, 0x59},
 426         {0x3618, 0x00},
 427         {0x5000, 0x06},
 428         {0x5003, 0x08},
 429         {0x5a00, 0x08},
 430         {0x3000, 0xff},
 431         {0x3001, 0xff},
 432         {0x3002, 0xff},
 433         {0x301d, 0xf0},
 434         {0x3a18, 0x00},
 435         {0x3a19, 0xf8},
 436         {0x3c01, 0x80},
 437         {0x3b07, 0x0c},
 438         {0x380c, 0x07},
 439         {0x380d, 0x3c},
 440         {0x3814, 0x35},
 441         {0x3815, 0x35},
 442         {0x3708, 0x64},
 443         {0x3709, 0x52},
 444         {0x3808, 0x02},
 445         {0x3809, 0x80},
 446         {0x380a, 0x01},
 447         {0x380b, 0xe0},
 448         {0x3800, 0x00},
 449         {0x3801, 0x10},
 450         {0x3802, 0x00},
 451         {0x3803, 0x00},
 452         {0x3804, 0x0a},
 453         {0x3805, 0x2f},
 454         {0x3806, 0x07},
 455         {0x3807, 0x9f},
 456         {0x3630, 0x2e},
 457         {0x3632, 0xe2},
 458         {0x3633, 0x23},
 459         {0x3634, 0x44},
 460         {0x3620, 0x64},
 461         {0x3621, 0xe0},
 462         {0x3600, 0x37},
 463         {0x3704, 0xa0},
 464         {0x3703, 0x5a},
 465         {0x3715, 0x78},
 466         {0x3717, 0x01},
 467         {0x3731, 0x02},
 468         {0x370b, 0x60},
 469         {0x3705, 0x1a},
 470         {0x3f05, 0x02},
 471         {0x3f06, 0x10},
 472         {0x3f01, 0x0a},
 473         {0x3a08, 0x01},
 474         {0x3a09, 0x2e},
 475         {0x3a0a, 0x00},
 476         {0x3a0b, 0xfb},
 477         {0x3a0d, 0x02},
 478         {0x3a0e, 0x01},
 479         {0x3a0f, 0x58},
 480         {0x3a10, 0x50},
 481         {0x3a1b, 0x58},
 482         {0x3a1e, 0x50},
 483         {0x3a11, 0x60},
 484         {0x3a1f, 0x28},
 485         {0x4001, 0x02},
 486         {0x4004, 0x02},
 487         {0x4000, 0x09},
 488         {0x3000, 0x00},
 489         {0x3001, 0x00},
 490         {0x3002, 0x00},
 491         {0x3017, 0xe0},
 492         {0x301c, 0xfc},
 493         {0x3636, 0x06},
 494         {0x3016, 0x08},
 495         {0x3827, 0xec},
 496         {0x3018, 0x44},
 497         {0x3035, 0x21},
 498         {0x3106, 0xf5},
 499         {0x3034, 0x1a},
 500         {0x301c, 0xf8},
 501         {0x4800, 0x34},
 502         {0x3503, 0x03},
 503         {0x0100, 0x01},
 504 };
 505
 506 static const struct ov5647_mode ov5647_modes[] = {
 507         /* 2592x1944 full resolution full FOV 10-bit mode. */
 508         {
 509                 .format = {
 510                         .code           = MEDIA_BUS_FMT_SBGGR10_1X10,
 511                         .colorspace     = V4L2_COLORSPACE_SRGB,
 512                         .field          = V4L2_FIELD_NONE,
 513                         .width          = 2592,
 514                         .height         = 1944
 515                 },
 516                 .crop = {
 517                         .left           = OV5647_PIXEL_ARRAY_LEFT,
 518                         .top            = OV5647_PIXEL_ARRAY_TOP,
 519                         .width          = 2592,
 520                         .height         = 1944
 521                 },
 522                 .pixel_rate     = 87500000,
 523                 .hts            = 2844,
 524                 .vts            = 0x7b0,
 525                 .reg_list       = ov5647_2592x1944_10bpp,
 526                 .num_regs       = ARRAY_SIZE(ov5647_2592x1944_10bpp)
 527         },
 528         /* 1080p30 10-bit mode. Full resolution centre-cropped down to 1080p. */
 529         {
 530                 .format = {
 531                         .code           = MEDIA_BUS_FMT_SBGGR10_1X10,
 532                         .colorspace     = V4L2_COLORSPACE_SRGB,
 533                         .field          = V4L2_FIELD_NONE,
 534                         .width          = 1920,
 535                         .height         = 1080
 536                 },
 537                 .crop = {
 538                         .left           = 348 + OV5647_PIXEL_ARRAY_LEFT,
 539                         .top            = 434 + OV5647_PIXEL_ARRAY_TOP,
 540                         .width          = 1928,
 541                         .height         = 1080,
 542                 },
 543                 .pixel_rate     = 81666700,
 544                 .hts            = 2416,
 545                 .vts            = 0x450,
 546                 .reg_list       = ov5647_1080p30_10bpp,
 547                 .num_regs       = ARRAY_SIZE(ov5647_1080p30_10bpp)
 548         },
 549         /* 2x2 binned full FOV 10-bit mode. */
 550         {
 551                 .format = {
 552                         .code           = MEDIA_BUS_FMT_SBGGR10_1X10,
 553                         .colorspace     = V4L2_COLORSPACE_SRGB,
 554                         .field          = V4L2_FIELD_NONE,
 555                         .width          = 1296,
 556                         .height         = 972
 557                 },
 558                 .crop = {
 559                         .left           = OV5647_PIXEL_ARRAY_LEFT,
 560                         .top            = OV5647_PIXEL_ARRAY_TOP,
 561                         .width          = 2592,
 562                         .height         = 1944,
 563                 },
 564                 .pixel_rate     = 81666700,
 565                 .hts            = 1896,
 566                 .vts            = 0x59b,
 567                 .reg_list       = ov5647_2x2binned_10bpp,
 568                 .num_regs       = ARRAY_SIZE(ov5647_2x2binned_10bpp)
 569         },
 570         /* 10-bit VGA full FOV 60fps. 2x2 binned and subsampled down to VGA. */
 571         {
 572                 .format = {
 573                         .code           = MEDIA_BUS_FMT_SBGGR10_1X10,
 574                         .colorspace     = V4L2_COLORSPACE_SRGB,
 575                         .field          = V4L2_FIELD_NONE,
 576                         .width          = 640,
 577                         .height         = 480
 578                 },
 579                 .crop = {
 580                         .left           = 16 + OV5647_PIXEL_ARRAY_LEFT,
 581                         .top            = OV5647_PIXEL_ARRAY_TOP,
 582                         .width          = 2560,
 583                         .height         = 1920,
 584                 },
 585                 .pixel_rate     = 55000000,
 586                 .hts            = 1852,
 587                 .vts            = 0x1f8,
 588                 .reg_list       = ov5647_640x480_10bpp,
 589                 .num_regs       = ARRAY_SIZE(ov5647_640x480_10bpp)
 590         },
 591 };
 592
 593 /* Default sensor mode is 2x2 binned 640x480 SBGGR10_1X10. */
 594 #define OV5647_DEFAULT_MODE     (&ov5647_modes[3])
 595 #define OV5647_DEFAULT_FORMAT   (ov5647_modes[3].format)
 596
 597 static int ov5647_write16(struct v4l2_subdev *sd, u16 reg, u16 val)
 598 {
 599         unsigned char data[4] = { reg >> 8, reg & 0xff, val >> 8, val & 0xff};
 600         struct i2c_client *client = v4l2_get_subdevdata(sd);
 601         int ret;
 602
 603         ret = i2c_master_send(client, data, 4);
 604         if (ret < 0) {
 605                 dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
 606                         __func__, reg);
 607                 return ret;
 608         }
 609
 610         return 0;
 611 }
 612
 613 static int ov5647_write(struct v4l2_subdev *sd, u16 reg, u8 val)
 614 {
 615         unsigned char data[3] = { reg >> 8, reg & 0xff, val};
 616         struct i2c_client *client = v4l2_get_subdevdata(sd);
 617         int ret;
 618
 619         ret = i2c_master_send(client, data, 3);
 620         if (ret < 0) {
 621                 dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
 622                                 __func__, reg);
 623                 return ret;
 624         }
 625
 626         return 0;
 627 }
 628
 629 static int ov5647_read(struct v4l2_subdev *sd, u16 reg, u8 *val)
 630 {
 631         struct i2c_client *client = v4l2_get_subdevdata(sd);
 632         u8 buf[2] = { reg >> 8, reg & 0xff };
 633         struct i2c_msg msg[2];
 634         int ret;
 635
 636         msg[0].addr = client->addr;
 637         msg[0].flags = client->flags;
 638         msg[0].buf = buf;
 639         msg[0].len = sizeof(buf);
 640
 641         msg[1].addr = client->addr;
 642         msg[1].flags = client->flags | I2C_M_RD;
 643         msg[1].buf = buf;
 644         msg[1].len = 1;
 645
 646         ret = i2c_transfer(client->adapter, msg, 2);
 647         if (ret != 2) {
 648                 dev_err(&client->dev, "%s: i2c read error, reg: %x = %d\n",
 649                         __func__, reg, ret);
 650                 return ret >= 0 ? -EINVAL : ret;
 651         }
 652
 653         *val = buf[0];
 654
 655         return 0;
 656 }
 657
 658 static int ov5647_write_array(struct v4l2_subdev *sd,
 659                               const struct regval_list *regs, int array_size)
 660 {
 661         int i, ret;
 662
 663         for (i = 0; i < array_size; i++) {
 664                 ret = ov5647_write(sd, regs[i].addr, regs[i].data);
 665                 if (ret < 0)
 666                         return ret;
 667         }
 668
 669         return 0;
 670 }
 671
 672 static int ov5647_set_virtual_channel(struct v4l2_subdev *sd, int channel)
 673 {
 674         u8 channel_id;
 675         int ret;
 676
 677         ret = ov5647_read(sd, OV5647_REG_MIPI_CTRL14, &channel_id);
 678         if (ret < 0)
 679                 return ret;
 680
 681         channel_id &= ~(3 << 6);
 682
 683         return ov5647_write(sd, OV5647_REG_MIPI_CTRL14,
 684                             channel_id | (channel << 6));
 685 }
 686
 687 static int ov5647_set_mode(struct v4l2_subdev *sd)
 688 {
 689         struct i2c_client *client = v4l2_get_subdevdata(sd);
 690         struct ov5647 *sensor = to_sensor(sd);
 691         u8 resetval, rdval;
 692         int ret;
 693
 694         ret = ov5647_read(sd, OV5647_SW_STANDBY, &rdval);
 695         if (ret < 0)
 696                 return ret;
 697
 698         ret = ov5647_write_array(sd, sensor->mode->reg_list,
 699                                  sensor->mode->num_regs);
 700         if (ret < 0) {
 701                 dev_err(&client->dev, "write sensor default regs error\n");
 702                 return ret;
 703         }
 704
 705         ret = ov5647_set_virtual_channel(sd, 0);
 706         if (ret < 0)
 707                 return ret;
 708
 709         ret = ov5647_read(sd, OV5647_SW_STANDBY, &resetval);
 710         if (ret < 0)
 711                 return ret;
 712
 713         if (!(resetval & 0x01)) {
 714                 dev_err(&client->dev, "Device was in SW standby");
 715                 ret = ov5647_write(sd, OV5647_SW_STANDBY, 0x01);
 716                 if (ret < 0)
 717                         return ret;
 718         }
 719
 720         return 0;
 721 }
 722
 723 static int ov5647_stream_on(struct v4l2_subdev *sd)
 724 {
 725         struct i2c_client *client = v4l2_get_subdevdata(sd);
 726         struct ov5647 *sensor = to_sensor(sd);
 727         u8 val = MIPI_CTRL00_BUS_IDLE;
 728         int ret;
 729
 730         ret = ov5647_set_mode(sd);
 731         if (ret) {
 732                 dev_err(&client->dev, "Failed to program sensor mode: %d\n", ret);
 733                 return ret;
 734         }
 735
 736         /* Apply customized values from user when stream starts. */
 737         ret =  __v4l2_ctrl_handler_setup(sd->ctrl_handler);
 738         if (ret)
 739                 return ret;
 740
 741         if (sensor->clock_ncont)
 742                 val |= MIPI_CTRL00_CLOCK_LANE_GATE |
 743                        MIPI_CTRL00_LINE_SYNC_ENABLE;
 744
 745         ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, val);
 746         if (ret < 0)
 747                 return ret;
 748
 749         ret = ov5647_write(sd, OV5647_REG_FRAME_OFF_NUMBER, 0x00);
 750         if (ret < 0)
 751                 return ret;
 752
 753         return ov5647_write(sd, OV5640_REG_PAD_OUT, 0x00);
 754 }
 755
 756 static int ov5647_stream_off(struct v4l2_subdev *sd)
 757 {
 758         int ret;
 759
 760         ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00,
 761                            MIPI_CTRL00_CLOCK_LANE_GATE | MIPI_CTRL00_BUS_IDLE |
 762                            MIPI_CTRL00_CLOCK_LANE_DISABLE);
 763         if (ret < 0)
 764                 return ret;
 765
 766         ret = ov5647_write(sd, OV5647_REG_FRAME_OFF_NUMBER, 0x0f);
 767         if (ret < 0)
 768                 return ret;
 769
 770         return ov5647_write(sd, OV5640_REG_PAD_OUT, 0x01);
 771 }
 772
 773 static int ov5647_power_on(struct device *dev)
 774 {
 775         struct ov5647 *sensor = dev_get_drvdata(dev);
 776         int ret;
 777
 778         dev_dbg(dev, "OV5647 power on\n");
 779
 780         if (sensor->pwdn) {
 781                 gpiod_set_value_cansleep(sensor->pwdn, 0);
 782                 msleep(PWDN_ACTIVE_DELAY_MS);
 783         }
 784
 785         ret = clk_prepare_enable(sensor->xclk);
 786         if (ret < 0) {
 787                 dev_err(dev, "clk prepare enable failed\n");
 788                 goto error_pwdn;
 789         }
 790
 791         ret = ov5647_write_array(&sensor->sd, sensor_oe_enable_regs,
 792                                  ARRAY_SIZE(sensor_oe_enable_regs));
 793         if (ret < 0) {
 794                 dev_err(dev, "write sensor_oe_enable_regs error\n");
 795                 goto error_clk_disable;
 796         }
 797
 798         /* Stream off to coax lanes into LP-11 state. */
 799         ret = ov5647_stream_off(&sensor->sd);
 800         if (ret < 0) {
 801                 dev_err(dev, "camera not available, check power\n");
 802                 goto error_clk_disable;
 803         }
 804
 805         return 0;
 806
 807 error_clk_disable:
 808         clk_disable_unprepare(sensor->xclk);
 809 error_pwdn:
 810         gpiod_set_value_cansleep(sensor->pwdn, 1);
 811
 812         return ret;
 813 }
 814
 815 static int ov5647_power_off(struct device *dev)
 816 {
 817         struct ov5647 *sensor = dev_get_drvdata(dev);
 818         u8 rdval;
 819         int ret;
 820
 821         dev_dbg(dev, "OV5647 power off\n");
 822
 823         ret = ov5647_write_array(&sensor->sd, sensor_oe_disable_regs,
 824                                  ARRAY_SIZE(sensor_oe_disable_regs));
 825         if (ret < 0)
 826                 dev_dbg(dev, "disable oe failed\n");
 827
 828         /* Enter software standby */
 829         ret = ov5647_read(&sensor->sd, OV5647_SW_STANDBY, &rdval);
 830         if (ret < 0)
 831                 dev_dbg(dev, "software standby failed\n");
 832
 833         rdval &= ~0x01;
 834         ret = ov5647_write(&sensor->sd, OV5647_SW_STANDBY, rdval);
 835         if (ret < 0)
 836                 dev_dbg(dev, "software standby failed\n");
 837
 838         clk_disable_unprepare(sensor->xclk);
 839         gpiod_set_value_cansleep(sensor->pwdn, 1);
 840
 841         return 0;
 842 }
 843
 844 #ifdef CONFIG_VIDEO_ADV_DEBUG
 845 static int ov5647_sensor_get_register(struct v4l2_subdev *sd,
 846                                       struct v4l2_dbg_register *reg)
 847 {
 848         int ret;
 849         u8 val;
 850
 851         ret = ov5647_read(sd, reg->reg & 0xff, &val);
 852         if (ret < 0)
 853                 return ret;
 854
 855         reg->val = val;
 856         reg->size = 1;
 857
 858         return 0;
 859 }
 860
 861 static int ov5647_sensor_set_register(struct v4l2_subdev *sd,
 862                                       const struct v4l2_dbg_register *reg)
 863 {
 864         return ov5647_write(sd, reg->reg & 0xff, reg->val & 0xff);
 865 }
 866 #endif
 867
 868 /* Subdev core operations registration */
 869 static const struct v4l2_subdev_core_ops ov5647_subdev_core_ops = {
 870         .subscribe_event        = v4l2_ctrl_subdev_subscribe_event,
 871         .unsubscribe_event      = v4l2_event_subdev_unsubscribe,
 872 #ifdef CONFIG_VIDEO_ADV_DEBUG
 873         .g_register             = ov5647_sensor_get_register,
 874         .s_register             = ov5647_sensor_set_register,
 875 #endif
 876 };
 877
 878 static const struct v4l2_rect *
 879 __ov5647_get_pad_crop(struct ov5647 *ov5647,
 880                       struct v4l2_subdev_state *sd_state,
 881                       unsigned int pad, enum v4l2_subdev_format_whence which)
 882 {
 883         switch (which) {
 884         case V4L2_SUBDEV_FORMAT_TRY:
 885                 return v4l2_subdev_state_get_crop(sd_state, pad);
 886         case V4L2_SUBDEV_FORMAT_ACTIVE:
 887                 return &ov5647->mode->crop;
 888         }
 889
 890         return NULL;
 891 }
 892
 893 static int ov5647_s_stream(struct v4l2_subdev *sd, int enable)
 894 {
 895         struct i2c_client *client = v4l2_get_subdevdata(sd);
 896         struct ov5647 *sensor = to_sensor(sd);
 897         int ret;
 898
 899         mutex_lock(&sensor->lock);
 900
 901         if (enable) {
 902                 ret = pm_runtime_resume_and_get(&client->dev);
 903                 if (ret < 0)
 904                         goto error_unlock;
 905
 906                 ret = ov5647_stream_on(sd);
 907                 if (ret < 0) {
 908                         dev_err(&client->dev, "stream start failed: %d\n", ret);
 909                         goto error_pm;
 910                 }
 911         } else {
 912                 ret = ov5647_stream_off(sd);
 913                 if (ret < 0) {
 914                         dev_err(&client->dev, "stream stop failed: %d\n", ret);
 915                         goto error_pm;
 916                 }
 917                 pm_runtime_put(&client->dev);
 918         }
 919
 920         mutex_unlock(&sensor->lock);
 921
 922         return 0;
 923
 924 error_pm:
 925         pm_runtime_put(&client->dev);
 926 error_unlock:
 927         mutex_unlock(&sensor->lock);
 928
 929         return ret;
 930 }
 931
 932 static const struct v4l2_subdev_video_ops ov5647_subdev_video_ops = {
 933         .s_stream =             ov5647_s_stream,
 934 };
 935
 936 static int ov5647_enum_mbus_code(struct v4l2_subdev *sd,
 937                                  struct v4l2_subdev_state *sd_state,
 938                                  struct v4l2_subdev_mbus_code_enum *code)
 939 {
 940         if (code->index > 0)
 941                 return -EINVAL;
 942
 943         code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
 944
 945         return 0;
 946 }
 947
 948 static int ov5647_enum_frame_size(struct v4l2_subdev *sd,
 949                                   struct v4l2_subdev_state *sd_state,
 950                                   struct v4l2_subdev_frame_size_enum *fse)
 951 {
 952         const struct v4l2_mbus_framefmt *fmt;
 953
 954         if (fse->code != MEDIA_BUS_FMT_SBGGR10_1X10 ||
 955             fse->index >= ARRAY_SIZE(ov5647_modes))
 956                 return -EINVAL;
 957
 958         fmt = &ov5647_modes[fse->index].format;
 959         fse->min_width = fmt->width;
 960         fse->max_width = fmt->width;
 961         fse->min_height = fmt->height;
 962         fse->max_height = fmt->height;
 963
 964         return 0;
 965 }
 966
 967 static int ov5647_get_pad_fmt(struct v4l2_subdev *sd,
 968                               struct v4l2_subdev_state *sd_state,
 969                               struct v4l2_subdev_format *format)
 970 {
 971         struct v4l2_mbus_framefmt *fmt = &format->format;
 972         const struct v4l2_mbus_framefmt *sensor_format;
 973         struct ov5647 *sensor = to_sensor(sd);
 974
 975         mutex_lock(&sensor->lock);
 976         switch (format->which) {
 977         case V4L2_SUBDEV_FORMAT_TRY:
 978                 sensor_format = v4l2_subdev_state_get_format(sd_state,
 979                                                              format->pad);
 980                 break;
 981         default:
 982                 sensor_format = &sensor->mode->format;
 983                 break;
 984         }
 985
 986         *fmt = *sensor_format;
 987         mutex_unlock(&sensor->lock);
 988
 989         return 0;
 990 }
 991
 992 static int ov5647_set_pad_fmt(struct v4l2_subdev *sd,
 993                               struct v4l2_subdev_state *sd_state,
 994                               struct v4l2_subdev_format *format)
 995 {
 996         struct v4l2_mbus_framefmt *fmt = &format->format;
 997         struct ov5647 *sensor = to_sensor(sd);
 998         const struct ov5647_mode *mode;
 999
1000         mode = v4l2_find_nearest_size(ov5647_modes, ARRAY_SIZE(ov5647_modes),
1001                                       format.width, format.height,
1002                                       fmt->width, fmt->height);
1003
1004         /* Update the sensor mode and apply at it at streamon time. */
1005         mutex_lock(&sensor->lock);
1006         if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
1007                 *v4l2_subdev_state_get_format(sd_state, format->pad) = mode->format;
1008         } else {
1009                 int exposure_max, exposure_def;
1010                 int hblank, vblank;
1011
1012                 sensor->mode = mode;
1013                 __v4l2_ctrl_modify_range(sensor->pixel_rate, mode->pixel_rate,
1014                                          mode->pixel_rate, 1, mode->pixel_rate);
1015
1016                 hblank = mode->hts - mode->format.width;
1017                 __v4l2_ctrl_modify_range(sensor->hblank, hblank, hblank, 1,
1018                                          hblank);
1019
1020                 vblank = mode->vts - mode->format.height;
1021                 __v4l2_ctrl_modify_range(sensor->vblank, OV5647_VBLANK_MIN,
1022                                          OV5647_VTS_MAX - mode->format.height,
1023                                          1, vblank);
1024                 __v4l2_ctrl_s_ctrl(sensor->vblank, vblank);
1025
1026                 exposure_max = mode->vts - 4;
1027                 exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
1028                 __v4l2_ctrl_modify_range(sensor->exposure,
1029                                          sensor->exposure->minimum,
1030                                          exposure_max, sensor->exposure->step,
1031                                          exposure_def);
1032         }
1033         *fmt = mode->format;
1034         mutex_unlock(&sensor->lock);
1035
1036         return 0;
1037 }
1038
1039 static int ov5647_get_selection(struct v4l2_subdev *sd,
1040                                 struct v4l2_subdev_state *sd_state,
1041                                 struct v4l2_subdev_selection *sel)
1042 {
1043         switch (sel->target) {
1044         case V4L2_SEL_TGT_CROP: {
1045                 struct ov5647 *sensor = to_sensor(sd);
1046
1047                 mutex_lock(&sensor->lock);
1048                 sel->r = *__ov5647_get_pad_crop(sensor, sd_state, sel->pad,
1049                                                 sel->which);
1050                 mutex_unlock(&sensor->lock);
1051
1052                 return 0;
1053         }
1054
1055         case V4L2_SEL_TGT_NATIVE_SIZE:
1056                 sel->r.top = 0;
1057                 sel->r.left = 0;
1058                 sel->r.width = OV5647_NATIVE_WIDTH;
1059                 sel->r.height = OV5647_NATIVE_HEIGHT;
1060
1061                 return 0;
1062
1063         case V4L2_SEL_TGT_CROP_DEFAULT:
1064         case V4L2_SEL_TGT_CROP_BOUNDS:
1065                 sel->r.top = OV5647_PIXEL_ARRAY_TOP;
1066                 sel->r.left = OV5647_PIXEL_ARRAY_LEFT;
1067                 sel->r.width = OV5647_PIXEL_ARRAY_WIDTH;
1068                 sel->r.height = OV5647_PIXEL_ARRAY_HEIGHT;
1069
1070                 return 0;
1071         }
1072
1073         return -EINVAL;
1074 }
1075
1076 static const struct v4l2_subdev_pad_ops ov5647_subdev_pad_ops = {
1077         .enum_mbus_code         = ov5647_enum_mbus_code,
1078         .enum_frame_size        = ov5647_enum_frame_size,
1079         .set_fmt                = ov5647_set_pad_fmt,
1080         .get_fmt                = ov5647_get_pad_fmt,
1081         .get_selection          = ov5647_get_selection,
1082 };
1083
1084 static const struct v4l2_subdev_ops ov5647_subdev_ops = {
1085         .core           = &ov5647_subdev_core_ops,
1086         .video          = &ov5647_subdev_video_ops,
1087         .pad            = &ov5647_subdev_pad_ops,
1088 };
1089
1090 static int ov5647_detect(struct v4l2_subdev *sd)
1091 {
1092         struct i2c_client *client = v4l2_get_subdevdata(sd);
1093         u8 read;
1094         int ret;
1095
1096         ret = ov5647_write(sd, OV5647_SW_RESET, 0x01);
1097         if (ret < 0)
1098                 return ret;
1099
1100         ret = ov5647_read(sd, OV5647_REG_CHIPID_H, &read);
1101         if (ret < 0)
1102                 return ret;
1103
1104         if (read != 0x56) {
1105                 dev_err(&client->dev, "ID High expected 0x56 got %x", read);
1106                 return -ENODEV;
1107         }
1108
1109         ret = ov5647_read(sd, OV5647_REG_CHIPID_L, &read);
1110         if (ret < 0)
1111                 return ret;
1112
1113         if (read != 0x47) {
1114                 dev_err(&client->dev, "ID Low expected 0x47 got %x", read);
1115                 return -ENODEV;
1116         }
1117
1118         return ov5647_write(sd, OV5647_SW_RESET, 0x00);
1119 }
1120
1121 static int ov5647_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1122 {
1123         struct v4l2_mbus_framefmt *format =
1124                                 v4l2_subdev_state_get_format(fh->state, 0);
1125         struct v4l2_rect *crop = v4l2_subdev_state_get_crop(fh->state, 0);
1126
1127         crop->left = OV5647_PIXEL_ARRAY_LEFT;
1128         crop->top = OV5647_PIXEL_ARRAY_TOP;
1129         crop->width = OV5647_PIXEL_ARRAY_WIDTH;
1130         crop->height = OV5647_PIXEL_ARRAY_HEIGHT;
1131
1132         *format = OV5647_DEFAULT_FORMAT;
1133
1134         return 0;
1135 }
1136
1137 static const struct v4l2_subdev_internal_ops ov5647_subdev_internal_ops = {
1138         .open = ov5647_open,
1139 };
1140
1141 static int ov5647_s_auto_white_balance(struct v4l2_subdev *sd, u32 val)
1142 {
1143         return ov5647_write(sd, OV5647_REG_AWB, val ? 1 : 0);
1144 }
1145
1146 static int ov5647_s_autogain(struct v4l2_subdev *sd, u32 val)
1147 {
1148         int ret;
1149         u8 reg;
1150
1151         /* Non-zero turns on AGC by clearing bit 1.*/
1152         ret = ov5647_read(sd, OV5647_REG_AEC_AGC, &reg);
1153         if (ret)
1154                 return ret;
1155
1156         return ov5647_write(sd, OV5647_REG_AEC_AGC, val ? reg & ~BIT(1)
1157                                                         : reg | BIT(1));
1158 }
1159
1160 static int ov5647_s_exposure_auto(struct v4l2_subdev *sd, u32 val)
1161 {
1162         int ret;
1163         u8 reg;
1164
1165         /*
1166          * Everything except V4L2_EXPOSURE_MANUAL turns on AEC by
1167          * clearing bit 0.
1168          */
1169         ret = ov5647_read(sd, OV5647_REG_AEC_AGC, &reg);
1170         if (ret)
1171                 return ret;
1172
1173         return ov5647_write(sd, OV5647_REG_AEC_AGC,
1174                             val == V4L2_EXPOSURE_MANUAL ? reg | BIT(0)
1175                                                         : reg & ~BIT(0));
1176 }
1177
1178 static int ov5647_s_analogue_gain(struct v4l2_subdev *sd, u32 val)
1179 {
1180         int ret;
1181
1182         /* 10 bits of gain, 2 in the high register. */
1183         ret = ov5647_write(sd, OV5647_REG_GAIN_HI, (val >> 8) & 3);
1184         if (ret)
1185                 return ret;
1186
1187         return ov5647_write(sd, OV5647_REG_GAIN_LO, val & 0xff);
1188 }
1189
1190 static int ov5647_s_exposure(struct v4l2_subdev *sd, u32 val)
1191 {
1192         int ret;
1193
1194         /*
1195          * Sensor has 20 bits, but the bottom 4 bits are fractions of a line
1196          * which we leave as zero (and don't receive in "val").
1197          */
1198         ret = ov5647_write(sd, OV5647_REG_EXP_HI, (val >> 12) & 0xf);
1199         if (ret)
1200                 return ret;
1201
1202         ret = ov5647_write(sd, OV5647_REG_EXP_MID, (val >> 4) & 0xff);
1203         if (ret)
1204                 return ret;
1205
1206         return ov5647_write(sd, OV5647_REG_EXP_LO, (val & 0xf) << 4);
1207 }
1208
1209 static int ov5647_s_ctrl(struct v4l2_ctrl *ctrl)
1210 {
1211         struct ov5647 *sensor = container_of(ctrl->handler,
1212                                             struct ov5647, ctrls);
1213         struct v4l2_subdev *sd = &sensor->sd;
1214         struct i2c_client *client = v4l2_get_subdevdata(sd);
1215         int ret = 0;
1216
1217
1218         /* v4l2_ctrl_lock() locks our own mutex */
1219
1220         if (ctrl->id == V4L2_CID_VBLANK) {
1221                 int exposure_max, exposure_def;
1222
1223                 /* Update max exposure while meeting expected vblanking */
1224                 exposure_max = sensor->mode->format.height + ctrl->val - 4;
1225                 exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
1226                 __v4l2_ctrl_modify_range(sensor->exposure,
1227                                          sensor->exposure->minimum,
1228                                          exposure_max, sensor->exposure->step,
1229                                          exposure_def);
1230         }
1231
1232         /*
1233          * If the device is not powered up do not apply any controls
1234          * to H/W at this time. Instead the controls will be restored
1235          * at s_stream(1) time.
1236          */
1237         if (pm_runtime_get_if_in_use(&client->dev) == 0)
1238                 return 0;
1239
1240         switch (ctrl->id) {
1241         case V4L2_CID_AUTO_WHITE_BALANCE:
1242                 ret = ov5647_s_auto_white_balance(sd, ctrl->val);
1243                 break;
1244         case V4L2_CID_AUTOGAIN:
1245                 ret = ov5647_s_autogain(sd, ctrl->val);
1246                 break;
1247         case V4L2_CID_EXPOSURE_AUTO:
1248                 ret = ov5647_s_exposure_auto(sd, ctrl->val);
1249                 break;
1250         case V4L2_CID_ANALOGUE_GAIN:
1251                 ret =  ov5647_s_analogue_gain(sd, ctrl->val);
1252                 break;
1253         case V4L2_CID_EXPOSURE:
1254                 ret = ov5647_s_exposure(sd, ctrl->val);
1255                 break;
1256         case V4L2_CID_VBLANK:
1257                 ret = ov5647_write16(sd, OV5647_REG_VTS_HI,
1258                                      sensor->mode->format.height + ctrl->val);
1259                 break;
1260         case V4L2_CID_TEST_PATTERN:
1261                 ret = ov5647_write(sd, OV5647_REG_ISPCTRL3D,
1262                                    ov5647_test_pattern_val[ctrl->val]);
1263                 break;
1264
1265         /* Read-only, but we adjust it based on mode. */
1266         case V4L2_CID_PIXEL_RATE:
1267         case V4L2_CID_HBLANK:
1268                 /* Read-only, but we adjust it based on mode. */
1269                 break;
1270
1271         default:
1272                 dev_info(&client->dev,
1273                          "Control (id:0x%x, val:0x%x) not supported\n",
1274                          ctrl->id, ctrl->val);
1275                 return -EINVAL;
1276         }
1277
1278         pm_runtime_put(&client->dev);
1279
1280         return ret;
1281 }
1282
1283 static const struct v4l2_ctrl_ops ov5647_ctrl_ops = {
1284         .s_ctrl = ov5647_s_ctrl,
1285 };
1286
1287 static int ov5647_init_controls(struct ov5647 *sensor)
1288 {
1289         struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd);
1290         int hblank, exposure_max, exposure_def;
1291
1292         v4l2_ctrl_handler_init(&sensor->ctrls, 9);
1293
1294         v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1295                           V4L2_CID_AUTOGAIN, 0, 1, 1, 0);
1296
1297         v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1298                           V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 0);
1299
1300         v4l2_ctrl_new_std_menu(&sensor->ctrls, &ov5647_ctrl_ops,
1301                                V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL,
1302                                0, V4L2_EXPOSURE_MANUAL);
1303
1304         exposure_max = sensor->mode->vts - 4;
1305         exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
1306         sensor->exposure = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1307                                              V4L2_CID_EXPOSURE,
1308                                              OV5647_EXPOSURE_MIN,
1309                                              exposure_max, OV5647_EXPOSURE_STEP,
1310                                              exposure_def);
1311
1312         /* min: 16 = 1.0x; max (10 bits); default: 32 = 2.0x. */
1313         v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1314                           V4L2_CID_ANALOGUE_GAIN, 16, 1023, 1, 32);
1315
1316         /* By default, PIXEL_RATE is read only, but it does change per mode */
1317         sensor->pixel_rate = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1318                                                V4L2_CID_PIXEL_RATE,
1319                                                sensor->mode->pixel_rate,
1320                                                sensor->mode->pixel_rate, 1,
1321                                                sensor->mode->pixel_rate);
1322
1323         /* By default, HBLANK is read only, but it does change per mode. */
1324         hblank = sensor->mode->hts - sensor->mode->format.width;
1325         sensor->hblank = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1326                                            V4L2_CID_HBLANK, hblank, hblank, 1,
1327                                            hblank);
1328
1329         sensor->vblank = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1330                                            V4L2_CID_VBLANK, OV5647_VBLANK_MIN,
1331                                            OV5647_VTS_MAX -
1332                                            sensor->mode->format.height, 1,
1333                                            sensor->mode->vts -
1334                                            sensor->mode->format.height);
1335
1336         v4l2_ctrl_new_std_menu_items(&sensor->ctrls, &ov5647_ctrl_ops,
1337                                      V4L2_CID_TEST_PATTERN,
1338                                      ARRAY_SIZE(ov5647_test_pattern_menu) - 1,
1339                                      0, 0, ov5647_test_pattern_menu);
1340
1341         if (sensor->ctrls.error)
1342                 goto handler_free;
1343
1344         sensor->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1345         sensor->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1346         sensor->sd.ctrl_handler = &sensor->ctrls;
1347
1348         return 0;
1349
1350 handler_free:
1351         dev_err(&client->dev, "%s Controls initialization failed (%d)\n",
1352                 __func__, sensor->ctrls.error);
1353         v4l2_ctrl_handler_free(&sensor->ctrls);
1354
1355         return sensor->ctrls.error;
1356 }
1357
1358 static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np)
1359 {
1360         struct v4l2_fwnode_endpoint bus_cfg = {
1361                 .bus_type = V4L2_MBUS_CSI2_DPHY,
1362         };
1363         struct device_node *ep __free(device_node) =
1364                 of_graph_get_endpoint_by_regs(np, 0, -1);
1365         int ret;
1366
1367         if (!ep)
1368                 return -EINVAL;
1369
1370         ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &bus_cfg);
1371         if (ret)
1372                 return ret;
1373
1374         sensor->clock_ncont = bus_cfg.bus.mipi_csi2.flags &
1375                               V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
1376
1377         return 0;
1378 }
1379
1380 static int ov5647_probe(struct i2c_client *client)
1381 {
1382         struct device_node *np = client->dev.of_node;
1383         struct device *dev = &client->dev;
1384         struct ov5647 *sensor;
1385         struct v4l2_subdev *sd;
1386         u32 xclk_freq;
1387         int ret;
1388
1389         sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
1390         if (!sensor)
1391                 return -ENOMEM;
1392
1393         if (IS_ENABLED(CONFIG_OF) && np) {
1394                 ret = ov5647_parse_dt(sensor, np);
1395                 if (ret) {
1396                         dev_err(dev, "DT parsing error: %d\n", ret);
1397                         return ret;
1398                 }
1399         }
1400
1401         sensor->xclk = devm_clk_get(dev, NULL);
1402         if (IS_ERR(sensor->xclk)) {
1403                 dev_err(dev, "could not get xclk");
1404                 return PTR_ERR(sensor->xclk);
1405         }
1406
1407         xclk_freq = clk_get_rate(sensor->xclk);
1408         if (xclk_freq != 25000000) {
1409                 dev_err(dev, "Unsupported clock frequency: %u\n", xclk_freq);
1410                 return -EINVAL;
1411         }
1412
1413         /* Request the power down GPIO asserted. */
1414         sensor->pwdn = devm_gpiod_get_optional(dev, "pwdn", GPIOD_OUT_HIGH);
1415         if (IS_ERR(sensor->pwdn)) {
1416                 dev_err(dev, "Failed to get 'pwdn' gpio\n");
1417                 return -EINVAL;
1418         }
1419
1420         mutex_init(&sensor->lock);
1421
1422         sensor->mode = OV5647_DEFAULT_MODE;
1423
1424         ret = ov5647_init_controls(sensor);
1425         if (ret)
1426                 goto mutex_destroy;
1427
1428         sd = &sensor->sd;
1429         v4l2_i2c_subdev_init(sd, client, &ov5647_subdev_ops);
1430         sd->internal_ops = &ov5647_subdev_internal_ops;
1431         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
1432
1433         sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
1434         sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
1435         ret = media_entity_pads_init(&sd->entity, 1, &sensor->pad);
1436         if (ret < 0)
1437                 goto ctrl_handler_free;
1438
1439         ret = ov5647_power_on(dev);
1440         if (ret)
1441                 goto entity_cleanup;
1442
1443         ret = ov5647_detect(sd);
1444         if (ret < 0)
1445                 goto power_off;
1446
1447         ret = v4l2_async_register_subdev(sd);
1448         if (ret < 0)
1449                 goto power_off;
1450
1451         /* Enable runtime PM and turn off the device */
1452         pm_runtime_set_active(dev);
1453         pm_runtime_enable(dev);
1454         pm_runtime_idle(dev);
1455
1456         dev_dbg(dev, "OmniVision OV5647 camera driver probed\n");
1457
1458         return 0;
1459
1460 power_off:
1461         ov5647_power_off(dev);
1462 entity_cleanup:
1463         media_entity_cleanup(&sd->entity);
1464 ctrl_handler_free:
1465         v4l2_ctrl_handler_free(&sensor->ctrls);
1466 mutex_destroy:
1467         mutex_destroy(&sensor->lock);
1468
1469         return ret;
1470 }
1471
1472 static void ov5647_remove(struct i2c_client *client)
1473 {
1474         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1475         struct ov5647 *sensor = to_sensor(sd);
1476
1477         v4l2_async_unregister_subdev(&sensor->sd);
1478         media_entity_cleanup(&sensor->sd.entity);
1479         v4l2_ctrl_handler_free(&sensor->ctrls);
1480         v4l2_device_unregister_subdev(sd);
1481         pm_runtime_disable(&client->dev);
1482         mutex_destroy(&sensor->lock);
1483 }
1484
1485 static const struct dev_pm_ops ov5647_pm_ops = {
1486         SET_RUNTIME_PM_OPS(ov5647_power_off, ov5647_power_on, NULL)
1487 };
1488
1489 static const struct i2c_device_id ov5647_id[] = {
1490         { "ov5647" },
1491         { /* sentinel */ }
1492 };
1493 MODULE_DEVICE_TABLE(i2c, ov5647_id);
1494
1495 #if IS_ENABLED(CONFIG_OF)
1496 static const struct of_device_id ov5647_of_match[] = {
1497         { .compatible = "ovti,ov5647" },
1498         { /* sentinel */ },
1499 };
1500 MODULE_DEVICE_TABLE(of, ov5647_of_match);
1501 #endif
1502
1503 static struct i2c_driver ov5647_driver = {
1504         .driver = {
1505                 .of_match_table = of_match_ptr(ov5647_of_match),
1506                 .name   = "ov5647",
1507                 .pm     = &ov5647_pm_ops,
1508         },
1509         .probe          = ov5647_probe,
1510         .remove         = ov5647_remove,
1511         .id_table       = ov5647_id,
1512 };
1513
1514 module_i2c_driver(ov5647_driver);
1515
1516 MODULE_AUTHOR("Ramiro Oliveira <[email protected]>");
1517 MODULE_DESCRIPTION("A low-level driver for OmniVision ov5647 sensors");
1518 MODULE_LICENSE("GPL v2");