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 <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
  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,
 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
 873 static 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
 909 error_pm:
 910         pm_runtime_put(&client->dev);
 911 error_unlock:
 912         mutex_unlock(&sensor->lock);
 913
 914         return ret;
 915 }
 916
 917 static const struct v4l2_subdev_video_ops ov5647_subdev_video_ops = {
 918         .s_stream =             ov5647_s_stream,
 919 };
 920
 921 static 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
 933 static 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
 952 static 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
 977 static 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
1024 static 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
1061 static 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
1069 static 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
1075 static 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
1106 static 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
1122 static const struct v4l2_subdev_internal_ops ov5647_subdev_internal_ops = {
1123         .open = ov5647_open,
1124 };
1125
1126 static 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
1131 static 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
1145 static 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
1163 static 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
1175 static 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
1194 static 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
1264 static const struct v4l2_ctrl_ops ov5647_ctrl_ops = {
1265         .s_ctrl = ov5647_s_ctrl,
1266 };
1267
1268 static 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
1326 handler_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
1334 static 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
1353 out:
1354         of_node_put(ep);
1355
1356         return ret;
1357 }
1358
1359 static 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
1439 power_off:
1440         ov5647_power_off(dev);
1441 entity_cleanup:
1442         media_entity_cleanup(&sd->entity);
1443 ctrl_handler_free:
1444         v4l2_ctrl_handler_free(&sensor->ctrls);
1445 mutex_destroy:
1446         mutex_destroy(&sensor->lock);
1447
1448         return ret;
1449 }
1450
1451 static void 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
1464 static const struct dev_pm_ops ov5647_pm_ops = {
1465         SET_RUNTIME_PM_OPS(ov5647_power_off, ov5647_power_on, NULL)
1466 };
1467
1468 static const struct i2c_device_id ov5647_id[] = {
1469         { "ov5647", 0 },
1470         { /* sentinel */ }
1471 };
1472 MODULE_DEVICE_TABLE(i2c, ov5647_id);
1473
1474 #if IS_ENABLED(CONFIG_OF)
1475 static const struct of_device_id ov5647_of_match[] = {
1476         { .compatible = "ovti,ov5647" },
1477         { /* sentinel */ },
1478 };
1479 MODULE_DEVICE_TABLE(of, ov5647_of_match);
1480 #endif
1481
1482 static struct i2c_driver ov5647_driver = {
1483         .driver = {
1484                 .of_match_table = of_match_ptr(ov5647_of_match),
1485                 .name   = "ov5647",
1486                 .pm     = &ov5647_pm_ops,
1487         },
1488         .probe_new      = ov5647_probe,
1489         .remove         = ov5647_remove,
1490         .id_table       = ov5647_id,
1491 };
1492
1493 module_i2c_driver(ov5647_driver);
1494
1495 MODULE_AUTHOR("Ramiro Oliveira <roliveir@synopsys.com>");
1496 MODULE_DESCRIPTION("A low-level driver for OmniVision ov5647 sensors");
1497 MODULE_LICENSE("GPL v2");