linux/drivers/media/i2c/ov5647.c
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   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 <s.nawrocki@samsung.com>
   7 *
   8 * Based on Omnivision OV7670 Camera Driver
   9 * Copyright (C) 2006-7 Jonathan Corbet <corbet@lwn.net>
  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
  83struct regval_list {
  84        u16 addr;
  85        u8 data;
  86};
  87
  88struct 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
  98struct 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
 114static inline struct ov5647 *to_sensor(struct v4l2_subdev *sd)
 115{
 116        return container_of(sd, struct ov5647, sd);
 117}
 118
 119static const struct regval_list sensor_oe_disable_regs[] = {
 120        {0x3000, 0x00},
 121        {0x3001, 0x00},
 122        {0x3002, 0x00},
 123};
 124
 125static const struct regval_list sensor_oe_enable_regs[] = {
 126        {0x3000, 0x0f},
 127        {0x3001, 0xff},
 128        {0x3002, 0xe4},
 129};
 130
 131static 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
 220static 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
 309static 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
 402static 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
 492static 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
 583static 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
 599static 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
 615static 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
 638static 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
 652static 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
 667static 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
 703static 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
 736static 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
 753static 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
 787error_clk_disable:
 788        clk_disable_unprepare(sensor->xclk);
 789error_pwdn:
 790        gpiod_set_value_cansleep(sensor->pwdn, 1);
 791
 792        return ret;
 793}
 794
 795static 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
 825static 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
 841static 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 */
 849static 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
 858static const struct v4l2_rect *
 859__ov5647_get_pad_crop(struct ov5647 *ov5647,
 860                      struct v4l2_subdev_state *sd_state,
 861                      unsigned int pad, enum v4l2_subdev_format_whence which)
 862{
 863        switch (which) {
 864        case V4L2_SUBDEV_FORMAT_TRY:
 865                return v4l2_subdev_get_try_crop(&ov5647->sd, sd_state, pad);
 866        case V4L2_SUBDEV_FORMAT_ACTIVE:
 867                return &ov5647->mode->crop;
 868        }
 869
 870        return NULL;
 871}
 872
 873static int ov5647_s_stream(struct v4l2_subdev *sd, int enable)
 874{
 875        struct i2c_client *client = v4l2_get_subdevdata(sd);
 876        struct ov5647 *sensor = to_sensor(sd);
 877        int ret;
 878
 879        mutex_lock(&sensor->lock);
 880        if (sensor->streaming == enable) {
 881                mutex_unlock(&sensor->lock);
 882                return 0;
 883        }
 884
 885        if (enable) {
 886                ret = pm_runtime_resume_and_get(&client->dev);
 887                if (ret < 0)
 888                        goto error_unlock;
 889
 890                ret = ov5647_stream_on(sd);
 891                if (ret < 0) {
 892                        dev_err(&client->dev, "stream start failed: %d\n", ret);
 893                        goto error_pm;
 894                }
 895        } else {
 896                ret = ov5647_stream_off(sd);
 897                if (ret < 0) {
 898                        dev_err(&client->dev, "stream stop failed: %d\n", ret);
 899                        goto error_pm;
 900                }
 901                pm_runtime_put(&client->dev);
 902        }
 903
 904        sensor->streaming = enable;
 905        mutex_unlock(&sensor->lock);
 906
 907        return 0;
 908
 909error_pm:
 910        pm_runtime_put(&client->dev);
 911error_unlock:
 912        mutex_unlock(&sensor->lock);
 913
 914        return ret;
 915}
 916
 917static const struct v4l2_subdev_video_ops ov5647_subdev_video_ops = {
 918        .s_stream =             ov5647_s_stream,
 919};
 920
 921static int ov5647_enum_mbus_code(struct v4l2_subdev *sd,
 922                                 struct v4l2_subdev_state *sd_state,
 923                                 struct v4l2_subdev_mbus_code_enum *code)
 924{
 925        if (code->index > 0)
 926                return -EINVAL;
 927
 928        code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
 929
 930        return 0;
 931}
 932
 933static int ov5647_enum_frame_size(struct v4l2_subdev *sd,
 934                                  struct v4l2_subdev_state *sd_state,
 935                                  struct v4l2_subdev_frame_size_enum *fse)
 936{
 937        const struct v4l2_mbus_framefmt *fmt;
 938
 939        if (fse->code != MEDIA_BUS_FMT_SBGGR10_1X10 ||
 940            fse->index >= ARRAY_SIZE(ov5647_modes))
 941                return -EINVAL;
 942
 943        fmt = &ov5647_modes[fse->index].format;
 944        fse->min_width = fmt->width;
 945        fse->max_width = fmt->width;
 946        fse->min_height = fmt->height;
 947        fse->max_height = fmt->height;
 948
 949        return 0;
 950}
 951
 952static int ov5647_get_pad_fmt(struct v4l2_subdev *sd,
 953                              struct v4l2_subdev_state *sd_state,
 954                              struct v4l2_subdev_format *format)
 955{
 956        struct v4l2_mbus_framefmt *fmt = &format->format;
 957        const struct v4l2_mbus_framefmt *sensor_format;
 958        struct ov5647 *sensor = to_sensor(sd);
 959
 960        mutex_lock(&sensor->lock);
 961        switch (format->which) {
 962        case V4L2_SUBDEV_FORMAT_TRY:
 963                sensor_format = v4l2_subdev_get_try_format(sd, sd_state,
 964                                                           format->pad);
 965                break;
 966        default:
 967                sensor_format = &sensor->mode->format;
 968                break;
 969        }
 970
 971        *fmt = *sensor_format;
 972        mutex_unlock(&sensor->lock);
 973
 974        return 0;
 975}
 976
 977static int ov5647_set_pad_fmt(struct v4l2_subdev *sd,
 978                              struct v4l2_subdev_state *sd_state,
 979                              struct v4l2_subdev_format *format)
 980{
 981        struct v4l2_mbus_framefmt *fmt = &format->format;
 982        struct ov5647 *sensor = to_sensor(sd);
 983        const struct ov5647_mode *mode;
 984
 985        mode = v4l2_find_nearest_size(ov5647_modes, ARRAY_SIZE(ov5647_modes),
 986                                      format.width, format.height,
 987                                      fmt->width, fmt->height);
 988
 989        /* Update the sensor mode and apply at it at streamon time. */
 990        mutex_lock(&sensor->lock);
 991        if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
 992                *v4l2_subdev_get_try_format(sd, sd_state, format->pad) = mode->format;
 993        } else {
 994                int exposure_max, exposure_def;
 995                int hblank, vblank;
 996
 997                sensor->mode = mode;
 998                __v4l2_ctrl_modify_range(sensor->pixel_rate, mode->pixel_rate,
 999                                         mode->pixel_rate, 1, mode->pixel_rate);
1000
1001                hblank = mode->hts - mode->format.width;
1002                __v4l2_ctrl_modify_range(sensor->hblank, hblank, hblank, 1,
1003                                         hblank);
1004
1005                vblank = mode->vts - mode->format.height;
1006                __v4l2_ctrl_modify_range(sensor->vblank, OV5647_VBLANK_MIN,
1007                                         OV5647_VTS_MAX - mode->format.height,
1008                                         1, vblank);
1009                __v4l2_ctrl_s_ctrl(sensor->vblank, vblank);
1010
1011                exposure_max = mode->vts - 4;
1012                exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
1013                __v4l2_ctrl_modify_range(sensor->exposure,
1014                                         sensor->exposure->minimum,
1015                                         exposure_max, sensor->exposure->step,
1016                                         exposure_def);
1017        }
1018        *fmt = mode->format;
1019        mutex_unlock(&sensor->lock);
1020
1021        return 0;
1022}
1023
1024static int ov5647_get_selection(struct v4l2_subdev *sd,
1025                                struct v4l2_subdev_state *sd_state,
1026                                struct v4l2_subdev_selection *sel)
1027{
1028        switch (sel->target) {
1029        case V4L2_SEL_TGT_CROP: {
1030                struct ov5647 *sensor = to_sensor(sd);
1031
1032                mutex_lock(&sensor->lock);
1033                sel->r = *__ov5647_get_pad_crop(sensor, sd_state, sel->pad,
1034                                                sel->which);
1035                mutex_unlock(&sensor->lock);
1036
1037                return 0;
1038        }
1039
1040        case V4L2_SEL_TGT_NATIVE_SIZE:
1041                sel->r.top = 0;
1042                sel->r.left = 0;
1043                sel->r.width = OV5647_NATIVE_WIDTH;
1044                sel->r.height = OV5647_NATIVE_HEIGHT;
1045
1046                return 0;
1047
1048        case V4L2_SEL_TGT_CROP_DEFAULT:
1049        case V4L2_SEL_TGT_CROP_BOUNDS:
1050                sel->r.top = OV5647_PIXEL_ARRAY_TOP;
1051                sel->r.left = OV5647_PIXEL_ARRAY_LEFT;
1052                sel->r.width = OV5647_PIXEL_ARRAY_WIDTH;
1053                sel->r.height = OV5647_PIXEL_ARRAY_HEIGHT;
1054
1055                return 0;
1056        }
1057
1058        return -EINVAL;
1059}
1060
1061static const struct v4l2_subdev_pad_ops ov5647_subdev_pad_ops = {
1062        .enum_mbus_code         = ov5647_enum_mbus_code,
1063        .enum_frame_size        = ov5647_enum_frame_size,
1064        .set_fmt                = ov5647_set_pad_fmt,
1065        .get_fmt                = ov5647_get_pad_fmt,
1066        .get_selection          = ov5647_get_selection,
1067};
1068
1069static const struct v4l2_subdev_ops ov5647_subdev_ops = {
1070        .core           = &ov5647_subdev_core_ops,
1071        .video          = &ov5647_subdev_video_ops,
1072        .pad            = &ov5647_subdev_pad_ops,
1073};
1074
1075static int ov5647_detect(struct v4l2_subdev *sd)
1076{
1077        struct i2c_client *client = v4l2_get_subdevdata(sd);
1078        u8 read;
1079        int ret;
1080
1081        ret = ov5647_write(sd, OV5647_SW_RESET, 0x01);
1082        if (ret < 0)
1083                return ret;
1084
1085        ret = ov5647_read(sd, OV5647_REG_CHIPID_H, &read);
1086        if (ret < 0)
1087                return ret;
1088
1089        if (read != 0x56) {
1090                dev_err(&client->dev, "ID High expected 0x56 got %x", read);
1091                return -ENODEV;
1092        }
1093
1094        ret = ov5647_read(sd, OV5647_REG_CHIPID_L, &read);
1095        if (ret < 0)
1096                return ret;
1097
1098        if (read != 0x47) {
1099                dev_err(&client->dev, "ID Low expected 0x47 got %x", read);
1100                return -ENODEV;
1101        }
1102
1103        return ov5647_write(sd, OV5647_SW_RESET, 0x00);
1104}
1105
1106static int ov5647_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1107{
1108        struct v4l2_mbus_framefmt *format =
1109                                v4l2_subdev_get_try_format(sd, fh->state, 0);
1110        struct v4l2_rect *crop = v4l2_subdev_get_try_crop(sd, fh->state, 0);
1111
1112        crop->left = OV5647_PIXEL_ARRAY_LEFT;
1113        crop->top = OV5647_PIXEL_ARRAY_TOP;
1114        crop->width = OV5647_PIXEL_ARRAY_WIDTH;
1115        crop->height = OV5647_PIXEL_ARRAY_HEIGHT;
1116
1117        *format = OV5647_DEFAULT_FORMAT;
1118
1119        return 0;
1120}
1121
1122static const struct v4l2_subdev_internal_ops ov5647_subdev_internal_ops = {
1123        .open = ov5647_open,
1124};
1125
1126static int ov5647_s_auto_white_balance(struct v4l2_subdev *sd, u32 val)
1127{
1128        return ov5647_write(sd, OV5647_REG_AWB, val ? 1 : 0);
1129}
1130
1131static int ov5647_s_autogain(struct v4l2_subdev *sd, u32 val)
1132{
1133        int ret;
1134        u8 reg;
1135
1136        /* Non-zero turns on AGC by clearing bit 1.*/
1137        ret = ov5647_read(sd, OV5647_REG_AEC_AGC, &reg);
1138        if (ret)
1139                return ret;
1140
1141        return ov5647_write(sd, OV5647_REG_AEC_AGC, val ? reg & ~BIT(1)
1142                                                        : reg | BIT(1));
1143}
1144
1145static int ov5647_s_exposure_auto(struct v4l2_subdev *sd, u32 val)
1146{
1147        int ret;
1148        u8 reg;
1149
1150        /*
1151         * Everything except V4L2_EXPOSURE_MANUAL turns on AEC by
1152         * clearing bit 0.
1153         */
1154        ret = ov5647_read(sd, OV5647_REG_AEC_AGC, &reg);
1155        if (ret)
1156                return ret;
1157
1158        return ov5647_write(sd, OV5647_REG_AEC_AGC,
1159                            val == V4L2_EXPOSURE_MANUAL ? reg | BIT(0)
1160                                                        : reg & ~BIT(0));
1161}
1162
1163static int ov5647_s_analogue_gain(struct v4l2_subdev *sd, u32 val)
1164{
1165        int ret;
1166
1167        /* 10 bits of gain, 2 in the high register. */
1168        ret = ov5647_write(sd, OV5647_REG_GAIN_HI, (val >> 8) & 3);
1169        if (ret)
1170                return ret;
1171
1172        return ov5647_write(sd, OV5647_REG_GAIN_LO, val & 0xff);
1173}
1174
1175static int ov5647_s_exposure(struct v4l2_subdev *sd, u32 val)
1176{
1177        int ret;
1178
1179        /*
1180         * Sensor has 20 bits, but the bottom 4 bits are fractions of a line
1181         * which we leave as zero (and don't receive in "val").
1182         */
1183        ret = ov5647_write(sd, OV5647_REG_EXP_HI, (val >> 12) & 0xf);
1184        if (ret)
1185                return ret;
1186
1187        ret = ov5647_write(sd, OV5647_REG_EXP_MID, (val >> 4) & 0xff);
1188        if (ret)
1189                return ret;
1190
1191        return ov5647_write(sd, OV5647_REG_EXP_LO, (val & 0xf) << 4);
1192}
1193
1194static int ov5647_s_ctrl(struct v4l2_ctrl *ctrl)
1195{
1196        struct ov5647 *sensor = container_of(ctrl->handler,
1197                                            struct ov5647, ctrls);
1198        struct v4l2_subdev *sd = &sensor->sd;
1199        struct i2c_client *client = v4l2_get_subdevdata(sd);
1200        int ret = 0;
1201
1202
1203        /* v4l2_ctrl_lock() locks our own mutex */
1204
1205        if (ctrl->id == V4L2_CID_VBLANK) {
1206                int exposure_max, exposure_def;
1207
1208                /* Update max exposure while meeting expected vblanking */
1209                exposure_max = sensor->mode->format.height + ctrl->val - 4;
1210                exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
1211                __v4l2_ctrl_modify_range(sensor->exposure,
1212                                         sensor->exposure->minimum,
1213                                         exposure_max, sensor->exposure->step,
1214                                         exposure_def);
1215        }
1216
1217        /*
1218         * If the device is not powered up do not apply any controls
1219         * to H/W at this time. Instead the controls will be restored
1220         * at s_stream(1) time.
1221         */
1222        if (pm_runtime_get_if_in_use(&client->dev) == 0)
1223                return 0;
1224
1225        switch (ctrl->id) {
1226        case V4L2_CID_AUTO_WHITE_BALANCE:
1227                ret = ov5647_s_auto_white_balance(sd, ctrl->val);
1228                break;
1229        case V4L2_CID_AUTOGAIN:
1230                ret = ov5647_s_autogain(sd, ctrl->val);
1231                break;
1232        case V4L2_CID_EXPOSURE_AUTO:
1233                ret = ov5647_s_exposure_auto(sd, ctrl->val);
1234                break;
1235        case V4L2_CID_ANALOGUE_GAIN:
1236                ret =  ov5647_s_analogue_gain(sd, ctrl->val);
1237                break;
1238        case V4L2_CID_EXPOSURE:
1239                ret = ov5647_s_exposure(sd, ctrl->val);
1240                break;
1241        case V4L2_CID_VBLANK:
1242                ret = ov5647_write16(sd, OV5647_REG_VTS_HI,
1243                                     sensor->mode->format.height + ctrl->val);
1244                break;
1245
1246        /* Read-only, but we adjust it based on mode. */
1247        case V4L2_CID_PIXEL_RATE:
1248        case V4L2_CID_HBLANK:
1249                /* Read-only, but we adjust it based on mode. */
1250                break;
1251
1252        default:
1253                dev_info(&client->dev,
1254                         "Control (id:0x%x, val:0x%x) not supported\n",
1255                         ctrl->id, ctrl->val);
1256                return -EINVAL;
1257        }
1258
1259        pm_runtime_put(&client->dev);
1260
1261        return ret;
1262}
1263
1264static const struct v4l2_ctrl_ops ov5647_ctrl_ops = {
1265        .s_ctrl = ov5647_s_ctrl,
1266};
1267
1268static int ov5647_init_controls(struct ov5647 *sensor)
1269{
1270        struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd);
1271        int hblank, exposure_max, exposure_def;
1272
1273        v4l2_ctrl_handler_init(&sensor->ctrls, 8);
1274
1275        v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1276                          V4L2_CID_AUTOGAIN, 0, 1, 1, 0);
1277
1278        v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1279                          V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 0);
1280
1281        v4l2_ctrl_new_std_menu(&sensor->ctrls, &ov5647_ctrl_ops,
1282                               V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL,
1283                               0, V4L2_EXPOSURE_MANUAL);
1284
1285        exposure_max = sensor->mode->vts - 4;
1286        exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
1287        sensor->exposure = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1288                                             V4L2_CID_EXPOSURE,
1289                                             OV5647_EXPOSURE_MIN,
1290                                             exposure_max, OV5647_EXPOSURE_STEP,
1291                                             exposure_def);
1292
1293        /* min: 16 = 1.0x; max (10 bits); default: 32 = 2.0x. */
1294        v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1295                          V4L2_CID_ANALOGUE_GAIN, 16, 1023, 1, 32);
1296
1297        /* By default, PIXEL_RATE is read only, but it does change per mode */
1298        sensor->pixel_rate = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1299                                               V4L2_CID_PIXEL_RATE,
1300                                               sensor->mode->pixel_rate,
1301                                               sensor->mode->pixel_rate, 1,
1302                                               sensor->mode->pixel_rate);
1303
1304        /* By default, HBLANK is read only, but it does change per mode. */
1305        hblank = sensor->mode->hts - sensor->mode->format.width;
1306        sensor->hblank = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1307                                           V4L2_CID_HBLANK, hblank, hblank, 1,
1308                                           hblank);
1309
1310        sensor->vblank = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1311                                           V4L2_CID_VBLANK, OV5647_VBLANK_MIN,
1312                                           OV5647_VTS_MAX -
1313                                           sensor->mode->format.height, 1,
1314                                           sensor->mode->vts -
1315                                           sensor->mode->format.height);
1316
1317        if (sensor->ctrls.error)
1318                goto handler_free;
1319
1320        sensor->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1321        sensor->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1322        sensor->sd.ctrl_handler = &sensor->ctrls;
1323
1324        return 0;
1325
1326handler_free:
1327        dev_err(&client->dev, "%s Controls initialization failed (%d)\n",
1328                __func__, sensor->ctrls.error);
1329        v4l2_ctrl_handler_free(&sensor->ctrls);
1330
1331        return sensor->ctrls.error;
1332}
1333
1334static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np)
1335{
1336        struct v4l2_fwnode_endpoint bus_cfg = {
1337                .bus_type = V4L2_MBUS_CSI2_DPHY,
1338        };
1339        struct device_node *ep;
1340        int ret;
1341
1342        ep = of_graph_get_next_endpoint(np, NULL);
1343        if (!ep)
1344                return -EINVAL;
1345
1346        ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &bus_cfg);
1347        if (ret)
1348                goto out;
1349
1350        sensor->clock_ncont = bus_cfg.bus.mipi_csi2.flags &
1351                              V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
1352
1353out:
1354        of_node_put(ep);
1355
1356        return ret;
1357}
1358
1359static int ov5647_probe(struct i2c_client *client)
1360{
1361        struct device_node *np = client->dev.of_node;
1362        struct device *dev = &client->dev;
1363        struct ov5647 *sensor;
1364        struct v4l2_subdev *sd;
1365        u32 xclk_freq;
1366        int ret;
1367
1368        sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
1369        if (!sensor)
1370                return -ENOMEM;
1371
1372        if (IS_ENABLED(CONFIG_OF) && np) {
1373                ret = ov5647_parse_dt(sensor, np);
1374                if (ret) {
1375                        dev_err(dev, "DT parsing error: %d\n", ret);
1376                        return ret;
1377                }
1378        }
1379
1380        sensor->xclk = devm_clk_get(dev, NULL);
1381        if (IS_ERR(sensor->xclk)) {
1382                dev_err(dev, "could not get xclk");
1383                return PTR_ERR(sensor->xclk);
1384        }
1385
1386        xclk_freq = clk_get_rate(sensor->xclk);
1387        if (xclk_freq != 25000000) {
1388                dev_err(dev, "Unsupported clock frequency: %u\n", xclk_freq);
1389                return -EINVAL;
1390        }
1391
1392        /* Request the power down GPIO asserted. */
1393        sensor->pwdn = devm_gpiod_get_optional(dev, "pwdn", GPIOD_OUT_HIGH);
1394        if (IS_ERR(sensor->pwdn)) {
1395                dev_err(dev, "Failed to get 'pwdn' gpio\n");
1396                return -EINVAL;
1397        }
1398
1399        mutex_init(&sensor->lock);
1400
1401        sensor->mode = OV5647_DEFAULT_MODE;
1402
1403        ret = ov5647_init_controls(sensor);
1404        if (ret)
1405                goto mutex_destroy;
1406
1407        sd = &sensor->sd;
1408        v4l2_i2c_subdev_init(sd, client, &ov5647_subdev_ops);
1409        sd->internal_ops = &ov5647_subdev_internal_ops;
1410        sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
1411
1412        sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
1413        sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
1414        ret = media_entity_pads_init(&sd->entity, 1, &sensor->pad);
1415        if (ret < 0)
1416                goto ctrl_handler_free;
1417
1418        ret = ov5647_power_on(dev);
1419        if (ret)
1420                goto entity_cleanup;
1421
1422        ret = ov5647_detect(sd);
1423        if (ret < 0)
1424                goto power_off;
1425
1426        ret = v4l2_async_register_subdev(sd);
1427        if (ret < 0)
1428                goto power_off;
1429
1430        /* Enable runtime PM and turn off the device */
1431        pm_runtime_set_active(dev);
1432        pm_runtime_enable(dev);
1433        pm_runtime_idle(dev);
1434
1435        dev_dbg(dev, "OmniVision OV5647 camera driver probed\n");
1436
1437        return 0;
1438
1439power_off:
1440        ov5647_power_off(dev);
1441entity_cleanup:
1442        media_entity_cleanup(&sd->entity);
1443ctrl_handler_free:
1444        v4l2_ctrl_handler_free(&sensor->ctrls);
1445mutex_destroy:
1446        mutex_destroy(&sensor->lock);
1447
1448        return ret;
1449}
1450
1451static int ov5647_remove(struct i2c_client *client)
1452{
1453        struct v4l2_subdev *sd = i2c_get_clientdata(client);
1454        struct ov5647 *sensor = to_sensor(sd);
1455
1456        v4l2_async_unregister_subdev(&sensor->sd);
1457        media_entity_cleanup(&sensor->sd.entity);
1458        v4l2_ctrl_handler_free(&sensor->ctrls);
1459        v4l2_device_unregister_subdev(sd);
1460        pm_runtime_disable(&client->dev);
1461        mutex_destroy(&sensor->lock);
1462
1463        return 0;
1464}
1465
1466static const struct dev_pm_ops ov5647_pm_ops = {
1467        SET_RUNTIME_PM_OPS(ov5647_power_off, ov5647_power_on, NULL)
1468};
1469
1470static const struct i2c_device_id ov5647_id[] = {
1471        { "ov5647", 0 },
1472        { /* sentinel */ }
1473};
1474MODULE_DEVICE_TABLE(i2c, ov5647_id);
1475
1476#if IS_ENABLED(CONFIG_OF)
1477static const struct of_device_id ov5647_of_match[] = {
1478        { .compatible = "ovti,ov5647" },
1479        { /* sentinel */ },
1480};
1481MODULE_DEVICE_TABLE(of, ov5647_of_match);
1482#endif
1483
1484static struct i2c_driver ov5647_driver = {
1485        .driver = {
1486                .of_match_table = of_match_ptr(ov5647_of_match),
1487                .name   = "ov5647",
1488                .pm     = &ov5647_pm_ops,
1489        },
1490        .probe_new      = ov5647_probe,
1491        .remove         = ov5647_remove,
1492        .id_table       = ov5647_id,
1493};
1494
1495module_i2c_driver(ov5647_driver);
1496
1497MODULE_AUTHOR("Ramiro Oliveira <roliveir@synopsys.com>");
1498MODULE_DESCRIPTION("A low-level driver for OmniVision ov5647 sensors");
1499MODULE_LICENSE("GPL v2");
1500
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