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
  62 #define REG_TERM 0xfffe
  63 #define VAL_TERM 0xfe
  64 #define REG_DLY  0xffff
  65
  66 /* OV5647 native and active pixel array size */
  67 #define OV5647_NATIVE_WIDTH             2624U
  68 #define OV5647_NATIVE_HEIGHT            1956U
  69
  70 #define OV5647_PIXEL_ARRAY_LEFT         16U
  71 #define OV5647_PIXEL_ARRAY_TOP          16U
  72 #define OV5647_PIXEL_ARRAY_WIDTH        2592U
  73 #define OV5647_PIXEL_ARRAY_HEIGHT       1944U
  74
  75 #define OV5647_VBLANK_MIN               4
  76 #define OV5647_VTS_MAX                  32767
  77
  78 #define OV5647_EXPOSURE_MIN             4
  79 #define OV5647_EXPOSURE_STEP            1
  80 #define OV5647_EXPOSURE_DEFAULT         1000
  81 #define OV5647_EXPOSURE_MAX             65535
  82
  83 struct regval_list {
  84         u16 addr;
  85         u8 data;
  86 };
  87
  88 struct ov5647_mode {
  89         struct v4l2_mbus_framefmt       format;
  90         struct v4l2_rect                crop;
  91         u64                             pixel_rate;
  92         int                             hts;
  93         int                             vts;
  94         const struct regval_list        *reg_list;
  95         unsigned int                    num_regs;
  96 };
  97
  98 struct ov5647 {
  99         struct v4l2_subdev              sd;
 100         struct media_pad                pad;
 101         struct mutex                    lock;
 102         struct clk                      *xclk;
 103         struct gpio_desc                *pwdn;
 104         bool                            clock_ncont;
 105         struct v4l2_ctrl_handler        ctrls;
 106         const struct ov5647_mode        *mode;
 107         struct v4l2_ctrl                *pixel_rate;
 108         struct v4l2_ctrl                *hblank;
 109         struct v4l2_ctrl                *vblank;
 110         struct v4l2_ctrl                *exposure;
 111         bool                            streaming;
 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 struct regval_list sensor_oe_disable_regs[] = {
 120         {0x3000, 0x00},
 121         {0x3001, 0x00},
 122         {0x3002, 0x00},
 123 };
 124
 125 static const struct regval_list sensor_oe_enable_regs[] = {
 126         {0x3000, 0x0f},
 127         {0x3001, 0xff},
 128         {0x3002, 0xe4},
 129 };
 130
 131 static struct regval_list ov5647_2592x1944_10bpp[] = {
 132         {0x0100, 0x00},
 133         {0x0103, 0x01},
 134         {0x3034, 0x1a},
 135         {0x3035, 0x21},
 136         {0x3036, 0x69},
 137         {0x303c, 0x11},
 138         {0x3106, 0xf5},
 139         {0x3821, 0x06},
 140         {0x3820, 0x00},
 141         {0x3827, 0xec},
 142         {0x370c, 0x03},
 143         {0x3612, 0x5b},
 144         {0x3618, 0x04},
 145         {0x5000, 0x06},
 146         {0x5002, 0x41},
 147         {0x5003, 0x08},
 148         {0x5a00, 0x08},
 149         {0x3000, 0x00},
 150         {0x3001, 0x00},
 151         {0x3002, 0x00},
 152         {0x3016, 0x08},
 153         {0x3017, 0xe0},
 154         {0x3018, 0x44},
 155         {0x301c, 0xf8},
 156         {0x301d, 0xf0},
 157         {0x3a18, 0x00},
 158         {0x3a19, 0xf8},
 159         {0x3c01, 0x80},
 160         {0x3b07, 0x0c},
 161         {0x380c, 0x0b},
 162         {0x380d, 0x1c},
 163         {0x3814, 0x11},
 164         {0x3815, 0x11},
 165         {0x3708, 0x64},
 166         {0x3709, 0x12},
 167         {0x3808, 0x0a},
 168         {0x3809, 0x20},
 169         {0x380a, 0x07},
 170         {0x380b, 0x98},
 171         {0x3800, 0x00},
 172         {0x3801, 0x00},
 173         {0x3802, 0x00},
 174         {0x3803, 0x00},
 175         {0x3804, 0x0a},
 176         {0x3805, 0x3f},
 177         {0x3806, 0x07},
 178         {0x3807, 0xa3},
 179         {0x3811, 0x10},
 180         {0x3813, 0x06},
 181         {0x3630, 0x2e},
 182         {0x3632, 0xe2},
 183         {0x3633, 0x23},
 184         {0x3634, 0x44},
 185         {0x3636, 0x06},
 186         {0x3620, 0x64},
 187         {0x3621, 0xe0},
 188         {0x3600, 0x37},
 189         {0x3704, 0xa0},
 190         {0x3703, 0x5a},
 191         {0x3715, 0x78},
 192         {0x3717, 0x01},
 193         {0x3731, 0x02},
 194         {0x370b, 0x60},
 195         {0x3705, 0x1a},
 196         {0x3f05, 0x02},
 197         {0x3f06, 0x10},
 198         {0x3f01, 0x0a},
 199         {0x3a08, 0x01},
 200         {0x3a09, 0x28},
 201         {0x3a0a, 0x00},
 202         {0x3a0b, 0xf6},
 203         {0x3a0d, 0x08},
 204         {0x3a0e, 0x06},
 205         {0x3a0f, 0x58},
 206         {0x3a10, 0x50},
 207         {0x3a1b, 0x58},
 208         {0x3a1e, 0x50},
 209         {0x3a11, 0x60},
 210         {0x3a1f, 0x28},
 211         {0x4001, 0x02},
 212         {0x4004, 0x04},
 213         {0x4000, 0x09},
 214         {0x4837, 0x19},
 215         {0x4800, 0x24},
 216         {0x3503, 0x03},
 217         {0x0100, 0x01},
 218 };
 219
 220 static struct regval_list ov5647_1080p30_10bpp[] = {
 221         {0x0100, 0x00},
 222         {0x0103, 0x01},
 223         {0x3034, 0x1a},
 224         {0x3035, 0x21},
 225         {0x3036, 0x62},
 226         {0x303c, 0x11},
 227         {0x3106, 0xf5},
 228         {0x3821, 0x06},
 229         {0x3820, 0x00},
 230         {0x3827, 0xec},
 231         {0x370c, 0x03},
 232         {0x3612, 0x5b},
 233         {0x3618, 0x04},
 234         {0x5000, 0x06},
 235         {0x5002, 0x41},
 236         {0x5003, 0x08},
 237         {0x5a00, 0x08},
 238         {0x3000, 0x00},
 239         {0x3001, 0x00},
 240         {0x3002, 0x00},
 241         {0x3016, 0x08},
 242         {0x3017, 0xe0},
 243         {0x3018, 0x44},
 244         {0x301c, 0xf8},
 245         {0x301d, 0xf0},
 246         {0x3a18, 0x00},
 247         {0x3a19, 0xf8},
 248         {0x3c01, 0x80},
 249         {0x3b07, 0x0c},
 250         {0x380c, 0x09},
 251         {0x380d, 0x70},
 252         {0x3814, 0x11},
 253         {0x3815, 0x11},
 254         {0x3708, 0x64},
 255         {0x3709, 0x12},
 256         {0x3808, 0x07},
 257         {0x3809, 0x80},
 258         {0x380a, 0x04},
 259         {0x380b, 0x38},
 260         {0x3800, 0x01},
 261         {0x3801, 0x5c},
 262         {0x3802, 0x01},
 263         {0x3803, 0xb2},
 264         {0x3804, 0x08},
 265         {0x3805, 0xe3},
 266         {0x3806, 0x05},
 267         {0x3807, 0xf1},
 268         {0x3811, 0x04},
 269         {0x3813, 0x02},
 270         {0x3630, 0x2e},
 271         {0x3632, 0xe2},
 272         {0x3633, 0x23},
 273         {0x3634, 0x44},
 274         {0x3636, 0x06},
 275         {0x3620, 0x64},
 276         {0x3621, 0xe0},
 277         {0x3600, 0x37},
 278         {0x3704, 0xa0},
 279         {0x3703, 0x5a},
 280         {0x3715, 0x78},
 281         {0x3717, 0x01},
 282         {0x3731, 0x02},
 283         {0x370b, 0x60},
 284         {0x3705, 0x1a},
 285         {0x3f05, 0x02},
 286         {0x3f06, 0x10},
 287         {0x3f01, 0x0a},
 288         {0x3a08, 0x01},
 289         {0x3a09, 0x4b},
 290         {0x3a0a, 0x01},
 291         {0x3a0b, 0x13},
 292         {0x3a0d, 0x04},
 293         {0x3a0e, 0x03},
 294         {0x3a0f, 0x58},
 295         {0x3a10, 0x50},
 296         {0x3a1b, 0x58},
 297         {0x3a1e, 0x50},
 298         {0x3a11, 0x60},
 299         {0x3a1f, 0x28},
 300         {0x4001, 0x02},
 301         {0x4004, 0x04},
 302         {0x4000, 0x09},
 303         {0x4837, 0x19},
 304         {0x4800, 0x34},
 305         {0x3503, 0x03},
 306         {0x0100, 0x01},
 307 };
 308
 309 static struct regval_list ov5647_2x2binned_10bpp[] = {
 310         {0x0100, 0x00},
 311         {0x0103, 0x01},
 312         {0x3034, 0x1a},
 313         {0x3035, 0x21},
 314         {0x3036, 0x62},
 315         {0x303c, 0x11},
 316         {0x3106, 0xf5},
 317         {0x3827, 0xec},
 318         {0x370c, 0x03},
 319         {0x3612, 0x59},
 320         {0x3618, 0x00},
 321         {0x5000, 0x06},
 322         {0x5002, 0x41},
 323         {0x5003, 0x08},
 324         {0x5a00, 0x08},
 325         {0x3000, 0x00},
 326         {0x3001, 0x00},
 327         {0x3002, 0x00},
 328         {0x3016, 0x08},
 329         {0x3017, 0xe0},
 330         {0x3018, 0x44},
 331         {0x301c, 0xf8},
 332         {0x301d, 0xf0},
 333         {0x3a18, 0x00},
 334         {0x3a19, 0xf8},
 335         {0x3c01, 0x80},
 336         {0x3b07, 0x0c},
 337         {0x3800, 0x00},
 338         {0x3801, 0x00},
 339         {0x3802, 0x00},
 340         {0x3803, 0x00},
 341         {0x3804, 0x0a},
 342         {0x3805, 0x3f},
 343         {0x3806, 0x07},
 344         {0x3807, 0xa3},
 345         {0x3808, 0x05},
 346         {0x3809, 0x10},
 347         {0x380a, 0x03},
 348         {0x380b, 0xcc},
 349         {0x380c, 0x07},
 350         {0x380d, 0x68},
 351         {0x3811, 0x0c},
 352         {0x3813, 0x06},
 353         {0x3814, 0x31},
 354         {0x3815, 0x31},
 355         {0x3630, 0x2e},
 356         {0x3632, 0xe2},
 357         {0x3633, 0x23},
 358         {0x3634, 0x44},
 359         {0x3636, 0x06},
 360         {0x3620, 0x64},
 361         {0x3621, 0xe0},
 362         {0x3600, 0x37},
 363         {0x3704, 0xa0},
 364         {0x3703, 0x5a},
 365         {0x3715, 0x78},
 366         {0x3717, 0x01},
 367         {0x3731, 0x02},
 368         {0x370b, 0x60},
 369         {0x3705, 0x1a},
 370         {0x3f05, 0x02},
 371         {0x3f06, 0x10},
 372         {0x3f01, 0x0a},
 373         {0x3a08, 0x01},
 374         {0x3a09, 0x28},
 375         {0x3a0a, 0x00},
 376         {0x3a0b, 0xf6},
 377         {0x3a0d, 0x08},
 378         {0x3a0e, 0x06},
 379         {0x3a0f, 0x58},
 380         {0x3a10, 0x50},
 381         {0x3a1b, 0x58},
 382         {0x3a1e, 0x50},
 383         {0x3a11, 0x60},
 384         {0x3a1f, 0x28},
 385         {0x4001, 0x02},
 386         {0x4004, 0x04},
 387         {0x4000, 0x09},
 388         {0x4837, 0x16},
 389         {0x4800, 0x24},
 390         {0x3503, 0x03},
 391         {0x3820, 0x41},
 392         {0x3821, 0x07},
 393         {0x350a, 0x00},
 394         {0x350b, 0x10},
 395         {0x3500, 0x00},
 396         {0x3501, 0x1a},
 397         {0x3502, 0xf0},
 398         {0x3212, 0xa0},
 399         {0x0100, 0x01},
 400 };
 401
 402 static struct regval_list ov5647_640x480_10bpp[] = {
 403         {0x0100, 0x00},
 404         {0x0103, 0x01},
 405         {0x3035, 0x11},
 406         {0x3036, 0x46},
 407         {0x303c, 0x11},
 408         {0x3821, 0x07},
 409         {0x3820, 0x41},
 410         {0x370c, 0x03},
 411         {0x3612, 0x59},
 412         {0x3618, 0x00},
 413         {0x5000, 0x06},
 414         {0x5003, 0x08},
 415         {0x5a00, 0x08},
 416         {0x3000, 0xff},
 417         {0x3001, 0xff},
 418         {0x3002, 0xff},
 419         {0x301d, 0xf0},
 420         {0x3a18, 0x00},
 421         {0x3a19, 0xf8},
 422         {0x3c01, 0x80},
 423         {0x3b07, 0x0c},
 424         {0x380c, 0x07},
 425         {0x380d, 0x3c},
 426         {0x3814, 0x35},
 427         {0x3815, 0x35},
 428         {0x3708, 0x64},
 429         {0x3709, 0x52},
 430         {0x3808, 0x02},
 431         {0x3809, 0x80},
 432         {0x380a, 0x01},
 433         {0x380b, 0xe0},
 434         {0x3800, 0x00},
 435         {0x3801, 0x10},
 436         {0x3802, 0x00},
 437         {0x3803, 0x00},
 438         {0x3804, 0x0a},
 439         {0x3805, 0x2f},
 440         {0x3806, 0x07},
 441         {0x3807, 0x9f},
 442         {0x3630, 0x2e},
 443         {0x3632, 0xe2},
 444         {0x3633, 0x23},
 445         {0x3634, 0x44},
 446         {0x3620, 0x64},
 447         {0x3621, 0xe0},
 448         {0x3600, 0x37},
 449         {0x3704, 0xa0},
 450         {0x3703, 0x5a},
 451         {0x3715, 0x78},
 452         {0x3717, 0x01},
 453         {0x3731, 0x02},
 454         {0x370b, 0x60},
 455         {0x3705, 0x1a},
 456         {0x3f05, 0x02},
 457         {0x3f06, 0x10},
 458         {0x3f01, 0x0a},
 459         {0x3a08, 0x01},
 460         {0x3a09, 0x2e},
 461         {0x3a0a, 0x00},
 462         {0x3a0b, 0xfb},
 463         {0x3a0d, 0x02},
 464         {0x3a0e, 0x01},
 465         {0x3a0f, 0x58},
 466         {0x3a10, 0x50},
 467         {0x3a1b, 0x58},
 468         {0x3a1e, 0x50},
 469         {0x3a11, 0x60},
 470         {0x3a1f, 0x28},
 471         {0x4001, 0x02},
 472         {0x4004, 0x02},
 473         {0x4000, 0x09},
 474         {0x3000, 0x00},
 475         {0x3001, 0x00},
 476         {0x3002, 0x00},
 477         {0x3017, 0xe0},
 478         {0x301c, 0xfc},
 479         {0x3636, 0x06},
 480         {0x3016, 0x08},
 481         {0x3827, 0xec},
 482         {0x3018, 0x44},
 483         {0x3035, 0x21},
 484         {0x3106, 0xf5},
 485         {0x3034, 0x1a},
 486         {0x301c, 0xf8},
 487         {0x4800, 0x34},
 488         {0x3503, 0x03},
 489         {0x0100, 0x01},
 490 };
 491
 492 static const struct ov5647_mode ov5647_modes[] = {
 493         /* 2592x1944 full resolution full FOV 10-bit mode. */
 494         {
 495                 .format = {
 496                         .code           = MEDIA_BUS_FMT_SBGGR10_1X10,
 497                         .colorspace     = V4L2_COLORSPACE_SRGB,
 498                         .field          = V4L2_FIELD_NONE,
 499                         .width          = 2592,
 500                         .height         = 1944
 501                 },
 502                 .crop = {
 503                         .left           = OV5647_PIXEL_ARRAY_LEFT,
 504                         .top            = OV5647_PIXEL_ARRAY_TOP,
 505                         .width          = 2592,
 506                         .height         = 1944
 507                 },
 508                 .pixel_rate     = 87500000,
 509                 .hts            = 2844,
 510                 .vts            = 0x7b0,
 511                 .reg_list       = ov5647_2592x1944_10bpp,
 512                 .num_regs       = ARRAY_SIZE(ov5647_2592x1944_10bpp)
 513         },
 514         /* 1080p30 10-bit mode. Full resolution centre-cropped down to 1080p. */
 515         {
 516                 .format = {
 517                         .code           = MEDIA_BUS_FMT_SBGGR10_1X10,
 518                         .colorspace     = V4L2_COLORSPACE_SRGB,
 519                         .field          = V4L2_FIELD_NONE,
 520                         .width          = 1920,
 521                         .height         = 1080
 522                 },
 523                 .crop = {
 524                         .left           = 348 + OV5647_PIXEL_ARRAY_LEFT,
 525                         .top            = 434 + OV5647_PIXEL_ARRAY_TOP,
 526                         .width          = 1928,
 527                         .height         = 1080,
 528                 },
 529                 .pixel_rate     = 81666700,
 530                 .hts            = 2416,
 531                 .vts            = 0x450,
 532                 .reg_list       = ov5647_1080p30_10bpp,
 533                 .num_regs       = ARRAY_SIZE(ov5647_1080p30_10bpp)
 534         },
 535         /* 2x2 binned full FOV 10-bit mode. */
 536         {
 537                 .format = {
 538                         .code           = MEDIA_BUS_FMT_SBGGR10_1X10,
 539                         .colorspace     = V4L2_COLORSPACE_SRGB,
 540                         .field          = V4L2_FIELD_NONE,
 541                         .width          = 1296,
 542                         .height         = 972
 543                 },
 544                 .crop = {
 545                         .left           = OV5647_PIXEL_ARRAY_LEFT,
 546                         .top            = OV5647_PIXEL_ARRAY_TOP,
 547                         .width          = 2592,
 548                         .height         = 1944,
 549                 },
 550                 .pixel_rate     = 81666700,
 551                 .hts            = 1896,
 552                 .vts            = 0x59b,
 553                 .reg_list       = ov5647_2x2binned_10bpp,
 554                 .num_regs       = ARRAY_SIZE(ov5647_2x2binned_10bpp)
 555         },
 556         /* 10-bit VGA full FOV 60fps. 2x2 binned and subsampled down to VGA. */
 557         {
 558                 .format = {
 559                         .code           = MEDIA_BUS_FMT_SBGGR10_1X10,
 560                         .colorspace     = V4L2_COLORSPACE_SRGB,
 561                         .field          = V4L2_FIELD_NONE,
 562                         .width          = 640,
 563                         .height         = 480
 564                 },
 565                 .crop = {
 566                         .left           = 16 + OV5647_PIXEL_ARRAY_LEFT,
 567                         .top            = OV5647_PIXEL_ARRAY_TOP,
 568                         .width          = 2560,
 569                         .height         = 1920,
 570                 },
 571                 .pixel_rate     = 55000000,
 572                 .hts            = 1852,
 573                 .vts            = 0x1f8,
 574                 .reg_list       = ov5647_640x480_10bpp,
 575                 .num_regs       = ARRAY_SIZE(ov5647_640x480_10bpp)
 576         },
 577 };
 578
 579 /* Default sensor mode is 2x2 binned 640x480 SBGGR10_1X10. */
 580 #define OV5647_DEFAULT_MODE     (&ov5647_modes[3])
 581 #define OV5647_DEFAULT_FORMAT   (ov5647_modes[3].format)
 582
 583 static int ov5647_write16(struct v4l2_subdev *sd, u16 reg, u16 val)
 584 {
 585         unsigned char data[4] = { reg >> 8, reg & 0xff, val >> 8, val & 0xff};
 586         struct i2c_client *client = v4l2_get_subdevdata(sd);
 587         int ret;
 588
 589         ret = i2c_master_send(client, data, 4);
 590         if (ret < 0) {
 591                 dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
 592                         __func__, reg);
 593                 return ret;
 594         }
 595
 596         return 0;
 597 }
 598
 599 static int ov5647_write(struct v4l2_subdev *sd, u16 reg, u8 val)
 600 {
 601         unsigned char data[3] = { reg >> 8, reg & 0xff, val};
 602         struct i2c_client *client = v4l2_get_subdevdata(sd);
 603         int ret;
 604
 605         ret = i2c_master_send(client, data, 3);
 606         if (ret < 0) {
 607                 dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
 608                                 __func__, reg);
 609                 return ret;
 610         }
 611
 612         return 0;
 613 }
 614
 615 static int ov5647_read(struct v4l2_subdev *sd, u16 reg, u8 *val)
 616 {
 617         unsigned char data_w[2] = { reg >> 8, reg & 0xff };
 618         struct i2c_client *client = v4l2_get_subdevdata(sd);
 619         int ret;
 620
 621         ret = i2c_master_send(client, data_w, 2);
 622         if (ret < 0) {
 623                 dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
 624                         __func__, reg);
 625                 return ret;
 626         }
 627
 628         ret = i2c_master_recv(client, val, 1);
 629         if (ret < 0) {
 630                 dev_dbg(&client->dev, "%s: i2c read error, reg: %x\n",
 631                                 __func__, reg);
 632                 return ret;
 633         }
 634
 635         return 0;
 636 }
 637
 638 static int ov5647_write_array(struct v4l2_subdev *sd,
 639                               const struct regval_list *regs, int array_size)
 640 {
 641         int i, ret;
 642
 643         for (i = 0; i < array_size; i++) {
 644                 ret = ov5647_write(sd, regs[i].addr, regs[i].data);
 645                 if (ret < 0)
 646                         return ret;
 647         }
 648
 649         return 0;
 650 }
 651
 652 static int ov5647_set_virtual_channel(struct v4l2_subdev *sd, int channel)
 653 {
 654         u8 channel_id;
 655         int ret;
 656
 657         ret = ov5647_read(sd, OV5647_REG_MIPI_CTRL14, &channel_id);
 658         if (ret < 0)
 659                 return ret;
 660
 661         channel_id &= ~(3 << 6);
 662
 663         return ov5647_write(sd, OV5647_REG_MIPI_CTRL14,
 664                             channel_id | (channel << 6));
 665 }
 666
 667 static int ov5647_set_mode(struct v4l2_subdev *sd)
 668 {
 669         struct i2c_client *client = v4l2_get_subdevdata(sd);
 670         struct ov5647 *sensor = to_sensor(sd);
 671         u8 resetval, rdval;
 672         int ret;
 673
 674         ret = ov5647_read(sd, OV5647_SW_STANDBY, &rdval);
 675         if (ret < 0)
 676                 return ret;
 677
 678         ret = ov5647_write_array(sd, sensor->mode->reg_list,
 679                                  sensor->mode->num_regs);
 680         if (ret < 0) {
 681                 dev_err(&client->dev, "write sensor default regs error\n");
 682                 return ret;
 683         }
 684
 685         ret = ov5647_set_virtual_channel(sd, 0);
 686         if (ret < 0)
 687                 return ret;
 688
 689         ret = ov5647_read(sd, OV5647_SW_STANDBY, &resetval);
 690         if (ret < 0)
 691                 return ret;
 692
 693         if (!(resetval & 0x01)) {
 694                 dev_err(&client->dev, "Device was in SW standby");
 695                 ret = ov5647_write(sd, OV5647_SW_STANDBY, 0x01);
 696                 if (ret < 0)
 697                         return ret;
 698         }
 699
 700         return 0;
 701 }
 702
 703 static int ov5647_stream_on(struct v4l2_subdev *sd)
 704 {
 705         struct i2c_client *client = v4l2_get_subdevdata(sd);
 706         struct ov5647 *sensor = to_sensor(sd);
 707         u8 val = MIPI_CTRL00_BUS_IDLE;
 708         int ret;
 709
 710         ret = ov5647_set_mode(sd);
 711         if (ret) {
 712                 dev_err(&client->dev, "Failed to program sensor mode: %d\n", ret);
 713                 return ret;
 714         }
 715
 716         /* Apply customized values from user when stream starts. */
 717         ret =  __v4l2_ctrl_handler_setup(sd->ctrl_handler);
 718         if (ret)
 719                 return ret;
 720
 721         if (sensor->clock_ncont)
 722                 val |= MIPI_CTRL00_CLOCK_LANE_GATE |
 723                        MIPI_CTRL00_LINE_SYNC_ENABLE;
 724
 725         ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, val);
 726         if (ret < 0)
 727                 return ret;
 728
 729         ret = ov5647_write(sd, OV5647_REG_FRAME_OFF_NUMBER, 0x00);
 730         if (ret < 0)
 731                 return ret;
 732
 733         return ov5647_write(sd, OV5640_REG_PAD_OUT, 0x00);
 734 }
 735
 736 static int ov5647_stream_off(struct v4l2_subdev *sd)
 737 {
 738         int ret;
 739
 740         ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00,
 741                            MIPI_CTRL00_CLOCK_LANE_GATE | MIPI_CTRL00_BUS_IDLE |
 742                            MIPI_CTRL00_CLOCK_LANE_DISABLE);
 743         if (ret < 0)
 744                 return ret;
 745
 746         ret = ov5647_write(sd, OV5647_REG_FRAME_OFF_NUMBER, 0x0f);
 747         if (ret < 0)
 748                 return ret;
 749
 750         return ov5647_write(sd, OV5640_REG_PAD_OUT, 0x01);
 751 }
 752
 753 static int ov5647_power_on(struct device *dev)
 754 {
 755         struct ov5647 *sensor = dev_get_drvdata(dev);
 756         int ret;
 757
 758         dev_dbg(dev, "OV5647 power on\n");
 759
 760         if (sensor->pwdn) {
 761                 gpiod_set_value_cansleep(sensor->pwdn, 0);
 762                 msleep(PWDN_ACTIVE_DELAY_MS);
 763         }
 764
 765         ret = clk_prepare_enable(sensor->xclk);
 766         if (ret < 0) {
 767                 dev_err(dev, "clk prepare enable failed\n");
 768                 goto error_pwdn;
 769         }
 770
 771         ret = ov5647_write_array(&sensor->sd, sensor_oe_enable_regs,
 772                                  ARRAY_SIZE(sensor_oe_enable_regs));
 773         if (ret < 0) {
 774                 dev_err(dev, "write sensor_oe_enable_regs error\n");
 775                 goto error_clk_disable;
 776         }
 777
 778         /* Stream off to coax lanes into LP-11 state. */
 779         ret = ov5647_stream_off(&sensor->sd);
 780         if (ret < 0) {
 781                 dev_err(dev, "camera not available, check power\n");
 782                 goto error_clk_disable;
 783         }
 784
 785         return 0;
 786
 787 error_clk_disable:
 788         clk_disable_unprepare(sensor->xclk);
 789 error_pwdn:
 790         gpiod_set_value_cansleep(sensor->pwdn, 1);
 791
 792         return ret;
 793 }
 794
 795 static int ov5647_power_off(struct device *dev)
 796 {
 797         struct ov5647 *sensor = dev_get_drvdata(dev);
 798         u8 rdval;
 799         int ret;
 800
 801         dev_dbg(dev, "OV5647 power off\n");
 802
 803         ret = ov5647_write_array(&sensor->sd, sensor_oe_disable_regs,
 804                                  ARRAY_SIZE(sensor_oe_disable_regs));
 805         if (ret < 0)
 806                 dev_dbg(dev, "disable oe failed\n");
 807
 808         /* Enter software standby */
 809         ret = ov5647_read(&sensor->sd, OV5647_SW_STANDBY, &rdval);
 810         if (ret < 0)
 811                 dev_dbg(dev, "software standby failed\n");
 812
 813         rdval &= ~0x01;
 814         ret = ov5647_write(&sensor->sd, OV5647_SW_STANDBY, rdval);
 815         if (ret < 0)
 816                 dev_dbg(dev, "software standby failed\n");
 817
 818         clk_disable_unprepare(sensor->xclk);
 819         gpiod_set_value_cansleep(sensor->pwdn, 1);
 820
 821         return 0;
 822 }
 823
 824 #ifdef CONFIG_VIDEO_ADV_DEBUG
 825 static int ov5647_sensor_get_register(struct v4l2_subdev *sd,
 826                                       struct v4l2_dbg_register *reg)
 827 {
 828         int ret;
 829         u8 val;
 830
 831         ret = ov5647_read(sd, reg->reg & 0xff, &val);
 832         if (ret < 0)
 833                 return ret;
 834
 835         reg->val = val;
 836         reg->size = 1;
 837
 838         return 0;
 839 }
 840
 841 static int ov5647_sensor_set_register(struct v4l2_subdev *sd,
 842                                       const struct v4l2_dbg_register *reg)
 843 {
 844         return ov5647_write(sd, reg->reg & 0xff, reg->val & 0xff);
 845 }
 846 #endif
 847
 848 /* Subdev core operations registration */
 849 static const struct v4l2_subdev_core_ops ov5647_subdev_core_ops = {
 850         .subscribe_event        = v4l2_ctrl_subdev_subscribe_event,
 851         .unsubscribe_event      = v4l2_event_subdev_unsubscribe,
 852 #ifdef CONFIG_VIDEO_ADV_DEBUG
 853         .g_register             = ov5647_sensor_get_register,
 854         .s_register             = ov5647_sensor_set_register,
 855 #endif
 856 };
 857
 858 static const struct v4l2_rect *
 859 __ov5647_get_pad_crop(struct ov5647 *ov5647, struct v4l2_subdev_pad_config *cfg,
 860                       unsigned int pad, enum v4l2_subdev_format_whence which)
 861 {
 862         switch (which) {
 863         case V4L2_SUBDEV_FORMAT_TRY:
 864                 return v4l2_subdev_get_try_crop(&ov5647->sd, cfg, pad);
 865         case V4L2_SUBDEV_FORMAT_ACTIVE:
 866                 return &ov5647->mode->crop;
 867         }
 868
 869         return NULL;
 870 }
 871
 872 static int ov5647_s_stream(struct v4l2_subdev *sd, int enable)
 873 {
 874         struct i2c_client *client = v4l2_get_subdevdata(sd);
 875         struct ov5647 *sensor = to_sensor(sd);
 876         int ret;
 877
 878         mutex_lock(&sensor->lock);
 879         if (sensor->streaming == enable) {
 880                 mutex_unlock(&sensor->lock);
 881                 return 0;
 882         }
 883
 884         if (enable) {
 885                 ret = pm_runtime_get_sync(&client->dev);
 886                 if (ret < 0)
 887                         goto error_unlock;
 888
 889                 ret = ov5647_stream_on(sd);
 890                 if (ret < 0) {
 891                         dev_err(&client->dev, "stream start failed: %d\n", ret);
 892                         goto error_unlock;
 893                 }
 894         } else {
 895                 ret = ov5647_stream_off(sd);
 896                 if (ret < 0) {
 897                         dev_err(&client->dev, "stream stop failed: %d\n", ret);
 898                         goto error_unlock;
 899                 }
 900                 pm_runtime_put(&client->dev);
 901         }
 902
 903         sensor->streaming = enable;
 904         mutex_unlock(&sensor->lock);
 905
 906         return 0;
 907
 908 error_unlock:
 909         pm_runtime_put(&client->dev);
 910         mutex_unlock(&sensor->lock);
 911
 912         return ret;
 913 }
 914
 915 static const struct v4l2_subdev_video_ops ov5647_subdev_video_ops = {
 916         .s_stream =             ov5647_s_stream,
 917 };
 918
 919 static int ov5647_enum_mbus_code(struct v4l2_subdev *sd,
 920                                  struct v4l2_subdev_pad_config *cfg,
 921                                  struct v4l2_subdev_mbus_code_enum *code)
 922 {
 923         if (code->index > 0)
 924                 return -EINVAL;
 925
 926         code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
 927
 928         return 0;
 929 }
 930
 931 static int ov5647_enum_frame_size(struct v4l2_subdev *sd,
 932                                   struct v4l2_subdev_pad_config *cfg,
 933                                   struct v4l2_subdev_frame_size_enum *fse)
 934 {
 935         const struct v4l2_mbus_framefmt *fmt;
 936
 937         if (fse->code != MEDIA_BUS_FMT_SBGGR10_1X10 ||
 938             fse->index >= ARRAY_SIZE(ov5647_modes))
 939                 return -EINVAL;
 940
 941         fmt = &ov5647_modes[fse->index].format;
 942         fse->min_width = fmt->width;
 943         fse->max_width = fmt->width;
 944         fse->min_height = fmt->height;
 945         fse->max_height = fmt->height;
 946
 947         return 0;
 948 }
 949
 950 static int ov5647_get_pad_fmt(struct v4l2_subdev *sd,
 951                               struct v4l2_subdev_pad_config *cfg,
 952                               struct v4l2_subdev_format *format)
 953 {
 954         struct v4l2_mbus_framefmt *fmt = &format->format;
 955         const struct v4l2_mbus_framefmt *sensor_format;
 956         struct ov5647 *sensor = to_sensor(sd);
 957
 958         mutex_lock(&sensor->lock);
 959         switch (format->which) {
 960         case V4L2_SUBDEV_FORMAT_TRY:
 961                 sensor_format = v4l2_subdev_get_try_format(sd, cfg, format->pad);
 962                 break;
 963         default:
 964                 sensor_format = &sensor->mode->format;
 965                 break;
 966         }
 967
 968         *fmt = *sensor_format;
 969         mutex_unlock(&sensor->lock);
 970
 971         return 0;
 972 }
 973
 974 static int ov5647_set_pad_fmt(struct v4l2_subdev *sd,
 975                               struct v4l2_subdev_pad_config *cfg,
 976                               struct v4l2_subdev_format *format)
 977 {
 978         struct v4l2_mbus_framefmt *fmt = &format->format;
 979         struct ov5647 *sensor = to_sensor(sd);
 980         const struct ov5647_mode *mode;
 981
 982         mode = v4l2_find_nearest_size(ov5647_modes, ARRAY_SIZE(ov5647_modes),
 983                                       format.width, format.height,
 984                                       fmt->width, fmt->height);
 985
 986         /* Update the sensor mode and apply at it at streamon time. */
 987         mutex_lock(&sensor->lock);
 988         if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
 989                 *v4l2_subdev_get_try_format(sd, cfg, format->pad) = mode->format;
 990         } else {
 991                 int exposure_max, exposure_def;
 992                 int hblank, vblank;
 993
 994                 sensor->mode = mode;
 995                 __v4l2_ctrl_modify_range(sensor->pixel_rate, mode->pixel_rate,
 996                                          mode->pixel_rate, 1, mode->pixel_rate);
 997
 998                 hblank = mode->hts - mode->format.width;
 999                 __v4l2_ctrl_modify_range(sensor->hblank, hblank, hblank, 1,
1000                                          hblank);
1001
1002                 vblank = mode->vts - mode->format.height;
1003                 __v4l2_ctrl_modify_range(sensor->vblank, OV5647_VBLANK_MIN,
1004                                          OV5647_VTS_MAX - mode->format.height,
1005                                          1, vblank);
1006                 __v4l2_ctrl_s_ctrl(sensor->vblank, vblank);
1007
1008                 exposure_max = mode->vts - 4;
1009                 exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
1010                 __v4l2_ctrl_modify_range(sensor->exposure,
1011                                          sensor->exposure->minimum,
1012                                          exposure_max, sensor->exposure->step,
1013                                          exposure_def);
1014         }
1015         *fmt = mode->format;
1016         mutex_unlock(&sensor->lock);
1017
1018         return 0;
1019 }
1020
1021 static int ov5647_get_selection(struct v4l2_subdev *sd,
1022                                 struct v4l2_subdev_pad_config *cfg,
1023                                 struct v4l2_subdev_selection *sel)
1024 {
1025         switch (sel->target) {
1026         case V4L2_SEL_TGT_CROP: {
1027                 struct ov5647 *sensor = to_sensor(sd);
1028
1029                 mutex_lock(&sensor->lock);
1030                 sel->r = *__ov5647_get_pad_crop(sensor, cfg, sel->pad,
1031                                                 sel->which);
1032                 mutex_unlock(&sensor->lock);
1033
1034                 return 0;
1035         }
1036
1037         case V4L2_SEL_TGT_NATIVE_SIZE:
1038                 sel->r.top = 0;
1039                 sel->r.left = 0;
1040                 sel->r.width = OV5647_NATIVE_WIDTH;
1041                 sel->r.height = OV5647_NATIVE_HEIGHT;
1042
1043                 return 0;
1044
1045         case V4L2_SEL_TGT_CROP_DEFAULT:
1046         case V4L2_SEL_TGT_CROP_BOUNDS:
1047                 sel->r.top = OV5647_PIXEL_ARRAY_TOP;
1048                 sel->r.left = OV5647_PIXEL_ARRAY_LEFT;
1049                 sel->r.width = OV5647_PIXEL_ARRAY_WIDTH;
1050                 sel->r.height = OV5647_PIXEL_ARRAY_HEIGHT;
1051
1052                 return 0;
1053         }
1054
1055         return -EINVAL;
1056 }
1057
1058 static const struct v4l2_subdev_pad_ops ov5647_subdev_pad_ops = {
1059         .enum_mbus_code         = ov5647_enum_mbus_code,
1060         .enum_frame_size        = ov5647_enum_frame_size,
1061         .set_fmt                = ov5647_set_pad_fmt,
1062         .get_fmt                = ov5647_get_pad_fmt,
1063         .get_selection          = ov5647_get_selection,
1064 };
1065
1066 static const struct v4l2_subdev_ops ov5647_subdev_ops = {
1067         .core           = &ov5647_subdev_core_ops,
1068         .video          = &ov5647_subdev_video_ops,
1069         .pad            = &ov5647_subdev_pad_ops,
1070 };
1071
1072 static int ov5647_detect(struct v4l2_subdev *sd)
1073 {
1074         struct i2c_client *client = v4l2_get_subdevdata(sd);
1075         u8 read;
1076         int ret;
1077
1078         ret = ov5647_write(sd, OV5647_SW_RESET, 0x01);
1079         if (ret < 0)
1080                 return ret;
1081
1082         ret = ov5647_read(sd, OV5647_REG_CHIPID_H, &read);
1083         if (ret < 0)
1084                 return ret;
1085
1086         if (read != 0x56) {
1087                 dev_err(&client->dev, "ID High expected 0x56 got %x", read);
1088                 return -ENODEV;
1089         }
1090
1091         ret = ov5647_read(sd, OV5647_REG_CHIPID_L, &read);
1092         if (ret < 0)
1093                 return ret;
1094
1095         if (read != 0x47) {
1096                 dev_err(&client->dev, "ID Low expected 0x47 got %x", read);
1097                 return -ENODEV;
1098         }
1099
1100         return ov5647_write(sd, OV5647_SW_RESET, 0x00);
1101 }
1102
1103 static int ov5647_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1104 {
1105         struct v4l2_mbus_framefmt *format =
1106                                 v4l2_subdev_get_try_format(sd, fh->pad, 0);
1107         struct v4l2_rect *crop = v4l2_subdev_get_try_crop(sd, fh->pad, 0);
1108
1109         crop->left = OV5647_PIXEL_ARRAY_LEFT;
1110         crop->top = OV5647_PIXEL_ARRAY_TOP;
1111         crop->width = OV5647_PIXEL_ARRAY_WIDTH;
1112         crop->height = OV5647_PIXEL_ARRAY_HEIGHT;
1113
1114         *format = OV5647_DEFAULT_FORMAT;
1115
1116         return 0;
1117 }
1118
1119 static const struct v4l2_subdev_internal_ops ov5647_subdev_internal_ops = {
1120         .open = ov5647_open,
1121 };
1122
1123 static int ov5647_s_auto_white_balance(struct v4l2_subdev *sd, u32 val)
1124 {
1125         return ov5647_write(sd, OV5647_REG_AWB, val ? 1 : 0);
1126 }
1127
1128 static int ov5647_s_autogain(struct v4l2_subdev *sd, u32 val)
1129 {
1130         int ret;
1131         u8 reg;
1132
1133         /* Non-zero turns on AGC by clearing bit 1.*/
1134         ret = ov5647_read(sd, OV5647_REG_AEC_AGC, &reg);
1135         if (ret)
1136                 return ret;
1137
1138         return ov5647_write(sd, OV5647_REG_AEC_AGC, val ? reg & ~BIT(1)
1139                                                         : reg | BIT(1));
1140 }
1141
1142 static int ov5647_s_exposure_auto(struct v4l2_subdev *sd, u32 val)
1143 {
1144         int ret;
1145         u8 reg;
1146
1147         /*
1148          * Everything except V4L2_EXPOSURE_MANUAL turns on AEC by
1149          * clearing bit 0.
1150          */
1151         ret = ov5647_read(sd, OV5647_REG_AEC_AGC, &reg);
1152         if (ret)
1153                 return ret;
1154
1155         return ov5647_write(sd, OV5647_REG_AEC_AGC,
1156                             val == V4L2_EXPOSURE_MANUAL ? reg | BIT(0)
1157                                                         : reg & ~BIT(0));
1158 }
1159
1160 static int ov5647_s_analogue_gain(struct v4l2_subdev *sd, u32 val)
1161 {
1162         int ret;
1163
1164         /* 10 bits of gain, 2 in the high register. */
1165         ret = ov5647_write(sd, OV5647_REG_GAIN_HI, (val >> 8) & 3);
1166         if (ret)
1167                 return ret;
1168
1169         return ov5647_write(sd, OV5647_REG_GAIN_LO, val & 0xff);
1170 }
1171
1172 static int ov5647_s_exposure(struct v4l2_subdev *sd, u32 val)
1173 {
1174         int ret;
1175
1176         /*
1177          * Sensor has 20 bits, but the bottom 4 bits are fractions of a line
1178          * which we leave as zero (and don't receive in "val").
1179          */
1180         ret = ov5647_write(sd, OV5647_REG_EXP_HI, (val >> 12) & 0xf);
1181         if (ret)
1182                 return ret;
1183
1184         ret = ov5647_write(sd, OV5647_REG_EXP_MID, (val >> 4) & 0xff);
1185         if (ret)
1186                 return ret;
1187
1188         return ov5647_write(sd, OV5647_REG_EXP_LO, (val & 0xf) << 4);
1189 }
1190
1191 static int ov5647_s_ctrl(struct v4l2_ctrl *ctrl)
1192 {
1193         struct ov5647 *sensor = container_of(ctrl->handler,
1194                                             struct ov5647, ctrls);
1195         struct v4l2_subdev *sd = &sensor->sd;
1196         struct i2c_client *client = v4l2_get_subdevdata(sd);
1197         int ret = 0;
1198
1199
1200         /* v4l2_ctrl_lock() locks our own mutex */
1201
1202         if (ctrl->id == V4L2_CID_VBLANK) {
1203                 int exposure_max, exposure_def;
1204
1205                 /* Update max exposure while meeting expected vblanking */
1206                 exposure_max = sensor->mode->format.height + ctrl->val - 4;
1207                 exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
1208                 __v4l2_ctrl_modify_range(sensor->exposure,
1209                                          sensor->exposure->minimum,
1210                                          exposure_max, sensor->exposure->step,
1211                                          exposure_def);
1212         }
1213
1214         /*
1215          * If the device is not powered up do not apply any controls
1216          * to H/W at this time. Instead the controls will be restored
1217          * at s_stream(1) time.
1218          */
1219         if (pm_runtime_get_if_in_use(&client->dev) == 0)
1220                 return 0;
1221
1222         switch (ctrl->id) {
1223         case V4L2_CID_AUTO_WHITE_BALANCE:
1224                 ret = ov5647_s_auto_white_balance(sd, ctrl->val);
1225                 break;
1226         case V4L2_CID_AUTOGAIN:
1227                 ret = ov5647_s_autogain(sd, ctrl->val);
1228                 break;
1229         case V4L2_CID_EXPOSURE_AUTO:
1230                 ret = ov5647_s_exposure_auto(sd, ctrl->val);
1231                 break;
1232         case V4L2_CID_ANALOGUE_GAIN:
1233                 ret =  ov5647_s_analogue_gain(sd, ctrl->val);
1234                 break;
1235         case V4L2_CID_EXPOSURE:
1236                 ret = ov5647_s_exposure(sd, ctrl->val);
1237                 break;
1238         case V4L2_CID_VBLANK:
1239                 ret = ov5647_write16(sd, OV5647_REG_VTS_HI,
1240                                      sensor->mode->format.height + ctrl->val);
1241                 break;
1242
1243         /* Read-only, but we adjust it based on mode. */
1244         case V4L2_CID_PIXEL_RATE:
1245         case V4L2_CID_HBLANK:
1246                 /* Read-only, but we adjust it based on mode. */
1247                 break;
1248
1249         default:
1250                 dev_info(&client->dev,
1251                          "Control (id:0x%x, val:0x%x) not supported\n",
1252                          ctrl->id, ctrl->val);
1253                 return -EINVAL;
1254         }
1255
1256         pm_runtime_put(&client->dev);
1257
1258         return ret;
1259 }
1260
1261 static const struct v4l2_ctrl_ops ov5647_ctrl_ops = {
1262         .s_ctrl = ov5647_s_ctrl,
1263 };
1264
1265 static int ov5647_init_controls(struct ov5647 *sensor)
1266 {
1267         struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd);
1268         int hblank, exposure_max, exposure_def;
1269
1270         v4l2_ctrl_handler_init(&sensor->ctrls, 8);
1271
1272         v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1273                           V4L2_CID_AUTOGAIN, 0, 1, 1, 0);
1274
1275         v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1276                           V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 0);
1277
1278         v4l2_ctrl_new_std_menu(&sensor->ctrls, &ov5647_ctrl_ops,
1279                                V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL,
1280                                0, V4L2_EXPOSURE_MANUAL);
1281
1282         exposure_max = sensor->mode->vts - 4;
1283         exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
1284         sensor->exposure = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1285                                              V4L2_CID_EXPOSURE,
1286                                              OV5647_EXPOSURE_MIN,
1287                                              exposure_max, OV5647_EXPOSURE_STEP,
1288                                              exposure_def);
1289
1290         /* min: 16 = 1.0x; max (10 bits); default: 32 = 2.0x. */
1291         v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1292                           V4L2_CID_ANALOGUE_GAIN, 16, 1023, 1, 32);
1293
1294         /* By default, PIXEL_RATE is read only, but it does change per mode */
1295         sensor->pixel_rate = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1296                                                V4L2_CID_PIXEL_RATE,
1297                                                sensor->mode->pixel_rate,
1298                                                sensor->mode->pixel_rate, 1,
1299                                                sensor->mode->pixel_rate);
1300
1301         /* By default, HBLANK is read only, but it does change per mode. */
1302         hblank = sensor->mode->hts - sensor->mode->format.width;
1303         sensor->hblank = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1304                                            V4L2_CID_HBLANK, hblank, hblank, 1,
1305                                            hblank);
1306
1307         sensor->vblank = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1308                                            V4L2_CID_VBLANK, OV5647_VBLANK_MIN,
1309                                            OV5647_VTS_MAX -
1310                                            sensor->mode->format.height, 1,
1311                                            sensor->mode->vts -
1312                                            sensor->mode->format.height);
1313
1314         if (sensor->ctrls.error)
1315                 goto handler_free;
1316
1317         sensor->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1318         sensor->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1319         sensor->sd.ctrl_handler = &sensor->ctrls;
1320
1321         return 0;
1322
1323 handler_free:
1324         dev_err(&client->dev, "%s Controls initialization failed (%d)\n",
1325                 __func__, sensor->ctrls.error);
1326         v4l2_ctrl_handler_free(&sensor->ctrls);
1327
1328         return sensor->ctrls.error;
1329 }
1330
1331 static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np)
1332 {
1333         struct v4l2_fwnode_endpoint bus_cfg = {
1334                 .bus_type = V4L2_MBUS_CSI2_DPHY,
1335         };
1336         struct device_node *ep;
1337         int ret;
1338
1339         ep = of_graph_get_next_endpoint(np, NULL);
1340         if (!ep)
1341                 return -EINVAL;
1342
1343         ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &bus_cfg);
1344         if (ret)
1345                 goto out;
1346
1347         sensor->clock_ncont = bus_cfg.bus.mipi_csi2.flags &
1348                               V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
1349
1350 out:
1351         of_node_put(ep);
1352
1353         return ret;
1354 }
1355
1356 static int ov5647_probe(struct i2c_client *client)
1357 {
1358         struct device_node *np = client->dev.of_node;
1359         struct device *dev = &client->dev;
1360         struct ov5647 *sensor;
1361         struct v4l2_subdev *sd;
1362         u32 xclk_freq;
1363         int ret;
1364
1365         sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
1366         if (!sensor)
1367                 return -ENOMEM;
1368
1369         if (IS_ENABLED(CONFIG_OF) && np) {
1370                 ret = ov5647_parse_dt(sensor, np);
1371                 if (ret) {
1372                         dev_err(dev, "DT parsing error: %d\n", ret);
1373                         return ret;
1374                 }
1375         }
1376
1377         sensor->xclk = devm_clk_get(dev, NULL);
1378         if (IS_ERR(sensor->xclk)) {
1379                 dev_err(dev, "could not get xclk");
1380                 return PTR_ERR(sensor->xclk);
1381         }
1382
1383         xclk_freq = clk_get_rate(sensor->xclk);
1384         if (xclk_freq != 25000000) {
1385                 dev_err(dev, "Unsupported clock frequency: %u\n", xclk_freq);
1386                 return -EINVAL;
1387         }
1388
1389         /* Request the power down GPIO asserted. */
1390         sensor->pwdn = devm_gpiod_get_optional(dev, "pwdn", GPIOD_OUT_HIGH);
1391         if (IS_ERR(sensor->pwdn)) {
1392                 dev_err(dev, "Failed to get 'pwdn' gpio\n");
1393                 return -EINVAL;
1394         }
1395
1396         mutex_init(&sensor->lock);
1397
1398         sensor->mode = OV5647_DEFAULT_MODE;
1399
1400         ret = ov5647_init_controls(sensor);
1401         if (ret)
1402                 goto mutex_destroy;
1403
1404         sd = &sensor->sd;
1405         v4l2_i2c_subdev_init(sd, client, &ov5647_subdev_ops);
1406         sd->internal_ops = &ov5647_subdev_internal_ops;
1407         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
1408
1409         sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
1410         sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
1411         ret = media_entity_pads_init(&sd->entity, 1, &sensor->pad);
1412         if (ret < 0)
1413                 goto ctrl_handler_free;
1414
1415         ret = ov5647_power_on(dev);
1416         if (ret)
1417                 goto entity_cleanup;
1418
1419         ret = ov5647_detect(sd);
1420         if (ret < 0)
1421                 goto power_off;
1422
1423         ret = v4l2_async_register_subdev(sd);
1424         if (ret < 0)
1425                 goto power_off;
1426
1427         /* Enable runtime PM and turn off the device */
1428         pm_runtime_set_active(dev);
1429         pm_runtime_enable(dev);
1430         pm_runtime_idle(dev);
1431
1432         dev_dbg(dev, "OmniVision OV5647 camera driver probed\n");
1433
1434         return 0;
1435
1436 power_off:
1437         ov5647_power_off(dev);
1438 entity_cleanup:
1439         media_entity_cleanup(&sd->entity);
1440 ctrl_handler_free:
1441         v4l2_ctrl_handler_free(&sensor->ctrls);
1442 mutex_destroy:
1443         mutex_destroy(&sensor->lock);
1444
1445         return ret;
1446 }
1447
1448 static int ov5647_remove(struct i2c_client *client)
1449 {
1450         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1451         struct ov5647 *sensor = to_sensor(sd);
1452
1453         v4l2_async_unregister_subdev(&sensor->sd);
1454         media_entity_cleanup(&sensor->sd.entity);
1455         v4l2_ctrl_handler_free(&sensor->ctrls);
1456         v4l2_device_unregister_subdev(sd);
1457         pm_runtime_disable(&client->dev);
1458         mutex_destroy(&sensor->lock);
1459
1460         return 0;
1461 }
1462
1463 static const struct dev_pm_ops ov5647_pm_ops = {
1464         SET_RUNTIME_PM_OPS(ov5647_power_off, ov5647_power_on, NULL)
1465 };
1466
1467 static const struct i2c_device_id ov5647_id[] = {
1468         { "ov5647", 0 },
1469         { /* sentinel */ }
1470 };
1471 MODULE_DEVICE_TABLE(i2c, ov5647_id);
1472
1473 #if IS_ENABLED(CONFIG_OF)
1474 static const struct of_device_id ov5647_of_match[] = {
1475         { .compatible = "ovti,ov5647" },
1476         { /* sentinel */ },
1477 };
1478 MODULE_DEVICE_TABLE(of, ov5647_of_match);
1479 #endif
1480
1481 static struct i2c_driver ov5647_driver = {
1482         .driver = {
1483                 .of_match_table = of_match_ptr(ov5647_of_match),
1484                 .name   = "ov5647",
1485                 .pm     = &ov5647_pm_ops,
1486         },
1487         .probe_new      = ov5647_probe,
1488         .remove         = ov5647_remove,
1489         .id_table       = ov5647_id,
1490 };
1491
1492 module_i2c_driver(ov5647_driver);
1493
1494 MODULE_AUTHOR("Ramiro Oliveira <[email protected]>");
1495 MODULE_DESCRIPTION("A low-level driver for OmniVision ov5647 sensors");
1496 MODULE_LICENSE("GPL v2");