drivers/media/i2c/ov5645.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Driver for the OV5645 camera sensor.
   4  *
   5  * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
   6  * Copyright (C) 2015 By Tech Design S.L. All Rights Reserved.
   7  * Copyright (C) 2012-2013 Freescale Semiconductor, Inc. All Rights Reserved.
   8  *
   9  * Based on:
  10  * - the OV5645 driver from QC msm-3.10 kernel on codeaurora.org:
  11  *   https://us.codeaurora.org/cgit/quic/la/kernel/msm-3.10/tree/drivers/
  12  *       media/platform/msm/camera_v2/sensor/ov5645.c?h=LA.BR.1.2.4_rb1.41
  13  * - the OV5640 driver posted on linux-media:
  14  *   https://www.mail-archive.com/linux-media%40vger.kernel.org/msg92671.html
  15  */
  16
  17 #include <linux/bitops.h>
  18 #include <linux/clk.h>
  19 #include <linux/delay.h>
  20 #include <linux/device.h>
  21 #include <linux/gpio/consumer.h>
  22 #include <linux/i2c.h>
  23 #include <linux/init.h>
  24 #include <linux/module.h>
  25 #include <linux/of.h>
  26 #include <linux/of_graph.h>
  27 #include <linux/pm_runtime.h>
  28 #include <linux/regulator/consumer.h>
  29 #include <linux/slab.h>
  30 #include <linux/types.h>
  31 #include <media/v4l2-ctrls.h>
  32 #include <media/v4l2-fwnode.h>
  33 #include <media/v4l2-subdev.h>
  34
  35 #define OV5645_SYSTEM_CTRL0             0x3008
  36 #define         OV5645_SYSTEM_CTRL0_START       0x02
  37 #define         OV5645_SYSTEM_CTRL0_STOP        0x42
  38 #define OV5645_CHIP_ID_HIGH             0x300a
  39 #define         OV5645_CHIP_ID_HIGH_BYTE        0x56
  40 #define OV5645_CHIP_ID_LOW              0x300b
  41 #define         OV5645_CHIP_ID_LOW_BYTE         0x45
  42 #define OV5645_IO_MIPI_CTRL00           0x300e
  43 #define OV5645_PAD_OUTPUT00             0x3019
  44 #define OV5645_AWB_MANUAL_CONTROL       0x3406
  45 #define         OV5645_AWB_MANUAL_ENABLE        BIT(0)
  46 #define OV5645_AEC_PK_MANUAL            0x3503
  47 #define         OV5645_AEC_MANUAL_ENABLE        BIT(0)
  48 #define         OV5645_AGC_MANUAL_ENABLE        BIT(1)
  49 #define OV5645_TIMING_TC_REG20          0x3820
  50 #define         OV5645_SENSOR_VFLIP             BIT(1)
  51 #define         OV5645_ISP_VFLIP                BIT(2)
  52 #define OV5645_TIMING_TC_REG21          0x3821
  53 #define         OV5645_SENSOR_MIRROR            BIT(1)
  54 #define OV5645_MIPI_CTRL00              0x4800
  55 #define OV5645_PRE_ISP_TEST_SETTING_1   0x503d
  56 #define         OV5645_TEST_PATTERN_MASK        0x3
  57 #define         OV5645_SET_TEST_PATTERN(x)      ((x) & OV5645_TEST_PATTERN_MASK)
  58 #define         OV5645_TEST_PATTERN_ENABLE      BIT(7)
  59 #define OV5645_SDE_SAT_U                0x5583
  60 #define OV5645_SDE_SAT_V                0x5584
  61
  62 /* regulator supplies */
  63 static const char * const ov5645_supply_name[] = {
  64         "vdddo", /* Digital I/O (1.8V) supply */
  65         "vdda",  /* Analog (2.8V) supply */
  66         "vddd",  /* Digital Core (1.5V) supply */
  67 };
  68
  69 #define OV5645_NUM_SUPPLIES ARRAY_SIZE(ov5645_supply_name)
  70
  71 struct reg_value {
  72         u16 reg;
  73         u8 val;
  74 };
  75
  76 struct ov5645_mode_info {
  77         u32 width;
  78         u32 height;
  79         const struct reg_value *data;
  80         u32 data_size;
  81         u32 pixel_clock;
  82         u32 link_freq;
  83 };
  84
  85 struct ov5645 {
  86         struct i2c_client *i2c_client;
  87         struct device *dev;
  88         struct v4l2_subdev sd;
  89         struct media_pad pad;
  90         struct v4l2_fwnode_endpoint ep;
  91         struct v4l2_mbus_framefmt fmt;
  92         struct v4l2_rect crop;
  93         struct clk *xclk;
  94
  95         struct regulator_bulk_data supplies[OV5645_NUM_SUPPLIES];
  96
  97         const struct ov5645_mode_info *current_mode;
  98
  99         struct v4l2_ctrl_handler ctrls;
 100         struct v4l2_ctrl *pixel_clock;
 101         struct v4l2_ctrl *link_freq;
 102
 103         /* Cached register values */
 104         u8 aec_pk_manual;
 105         u8 timing_tc_reg20;
 106         u8 timing_tc_reg21;
 107
 108         struct mutex power_lock; /* lock to protect power state */
 109
 110         struct gpio_desc *enable_gpio;
 111         struct gpio_desc *rst_gpio;
 112 };
 113
 114 static inline struct ov5645 *to_ov5645(struct v4l2_subdev *sd)
 115 {
 116         return container_of(sd, struct ov5645, sd);
 117 }
 118
 119 static const struct reg_value ov5645_global_init_setting[] = {
 120         { 0x3103, 0x11 },
 121         { 0x3008, 0x42 },
 122         { 0x3103, 0x03 },
 123         { 0x3503, 0x07 },
 124         { 0x3002, 0x1c },
 125         { 0x3006, 0xc3 },
 126         { 0x3017, 0x00 },
 127         { 0x3018, 0x00 },
 128         { 0x302e, 0x0b },
 129         { 0x3037, 0x13 },
 130         { 0x3108, 0x01 },
 131         { 0x3611, 0x06 },
 132         { 0x3500, 0x00 },
 133         { 0x3501, 0x01 },
 134         { 0x3502, 0x00 },
 135         { 0x350a, 0x00 },
 136         { 0x350b, 0x3f },
 137         { 0x3620, 0x33 },
 138         { 0x3621, 0xe0 },
 139         { 0x3622, 0x01 },
 140         { 0x3630, 0x2e },
 141         { 0x3631, 0x00 },
 142         { 0x3632, 0x32 },
 143         { 0x3633, 0x52 },
 144         { 0x3634, 0x70 },
 145         { 0x3635, 0x13 },
 146         { 0x3636, 0x03 },
 147         { 0x3703, 0x5a },
 148         { 0x3704, 0xa0 },
 149         { 0x3705, 0x1a },
 150         { 0x3709, 0x12 },
 151         { 0x370b, 0x61 },
 152         { 0x370f, 0x10 },
 153         { 0x3715, 0x78 },
 154         { 0x3717, 0x01 },
 155         { 0x371b, 0x20 },
 156         { 0x3731, 0x12 },
 157         { 0x3901, 0x0a },
 158         { 0x3905, 0x02 },
 159         { 0x3906, 0x10 },
 160         { 0x3719, 0x86 },
 161         { 0x3810, 0x00 },
 162         { 0x3811, 0x10 },
 163         { 0x3812, 0x00 },
 164         { 0x3821, 0x01 },
 165         { 0x3824, 0x01 },
 166         { 0x3826, 0x03 },
 167         { 0x3828, 0x08 },
 168         { 0x3a19, 0xf8 },
 169         { 0x3c01, 0x34 },
 170         { 0x3c04, 0x28 },
 171         { 0x3c05, 0x98 },
 172         { 0x3c07, 0x07 },
 173         { 0x3c09, 0xc2 },
 174         { 0x3c0a, 0x9c },
 175         { 0x3c0b, 0x40 },
 176         { 0x3c01, 0x34 },
 177         { 0x4001, 0x02 },
 178         { 0x4514, 0x00 },
 179         { 0x4520, 0xb0 },
 180         { 0x460b, 0x37 },
 181         { 0x460c, 0x20 },
 182         { 0x4818, 0x01 },
 183         { 0x481d, 0xf0 },
 184         { 0x481f, 0x50 },
 185         { 0x4823, 0x70 },
 186         { 0x4831, 0x14 },
 187         { 0x5000, 0xa7 },
 188         { 0x5001, 0x83 },
 189         { 0x501d, 0x00 },
 190         { 0x501f, 0x00 },
 191         { 0x503d, 0x00 },
 192         { 0x505c, 0x30 },
 193         { 0x5181, 0x59 },
 194         { 0x5183, 0x00 },
 195         { 0x5191, 0xf0 },
 196         { 0x5192, 0x03 },
 197         { 0x5684, 0x10 },
 198         { 0x5685, 0xa0 },
 199         { 0x5686, 0x0c },
 200         { 0x5687, 0x78 },
 201         { 0x5a00, 0x08 },
 202         { 0x5a21, 0x00 },
 203         { 0x5a24, 0x00 },
 204         { 0x3008, 0x02 },
 205         { 0x3503, 0x00 },
 206         { 0x5180, 0xff },
 207         { 0x5181, 0xf2 },
 208         { 0x5182, 0x00 },
 209         { 0x5183, 0x14 },
 210         { 0x5184, 0x25 },
 211         { 0x5185, 0x24 },
 212         { 0x5186, 0x09 },
 213         { 0x5187, 0x09 },
 214         { 0x5188, 0x0a },
 215         { 0x5189, 0x75 },
 216         { 0x518a, 0x52 },
 217         { 0x518b, 0xea },
 218         { 0x518c, 0xa8 },
 219         { 0x518d, 0x42 },
 220         { 0x518e, 0x38 },
 221         { 0x518f, 0x56 },
 222         { 0x5190, 0x42 },
 223         { 0x5191, 0xf8 },
 224         { 0x5192, 0x04 },
 225         { 0x5193, 0x70 },
 226         { 0x5194, 0xf0 },
 227         { 0x5195, 0xf0 },
 228         { 0x5196, 0x03 },
 229         { 0x5197, 0x01 },
 230         { 0x5198, 0x04 },
 231         { 0x5199, 0x12 },
 232         { 0x519a, 0x04 },
 233         { 0x519b, 0x00 },
 234         { 0x519c, 0x06 },
 235         { 0x519d, 0x82 },
 236         { 0x519e, 0x38 },
 237         { 0x5381, 0x1e },
 238         { 0x5382, 0x5b },
 239         { 0x5383, 0x08 },
 240         { 0x5384, 0x0a },
 241         { 0x5385, 0x7e },
 242         { 0x5386, 0x88 },
 243         { 0x5387, 0x7c },
 244         { 0x5388, 0x6c },
 245         { 0x5389, 0x10 },
 246         { 0x538a, 0x01 },
 247         { 0x538b, 0x98 },
 248         { 0x5300, 0x08 },
 249         { 0x5301, 0x30 },
 250         { 0x5302, 0x10 },
 251         { 0x5303, 0x00 },
 252         { 0x5304, 0x08 },
 253         { 0x5305, 0x30 },
 254         { 0x5306, 0x08 },
 255         { 0x5307, 0x16 },
 256         { 0x5309, 0x08 },
 257         { 0x530a, 0x30 },
 258         { 0x530b, 0x04 },
 259         { 0x530c, 0x06 },
 260         { 0x5480, 0x01 },
 261         { 0x5481, 0x08 },
 262         { 0x5482, 0x14 },
 263         { 0x5483, 0x28 },
 264         { 0x5484, 0x51 },
 265         { 0x5485, 0x65 },
 266         { 0x5486, 0x71 },
 267         { 0x5487, 0x7d },
 268         { 0x5488, 0x87 },
 269         { 0x5489, 0x91 },
 270         { 0x548a, 0x9a },
 271         { 0x548b, 0xaa },
 272         { 0x548c, 0xb8 },
 273         { 0x548d, 0xcd },
 274         { 0x548e, 0xdd },
 275         { 0x548f, 0xea },
 276         { 0x5490, 0x1d },
 277         { 0x5580, 0x02 },
 278         { 0x5583, 0x40 },
 279         { 0x5584, 0x10 },
 280         { 0x5589, 0x10 },
 281         { 0x558a, 0x00 },
 282         { 0x558b, 0xf8 },
 283         { 0x5800, 0x3f },
 284         { 0x5801, 0x16 },
 285         { 0x5802, 0x0e },
 286         { 0x5803, 0x0d },
 287         { 0x5804, 0x17 },
 288         { 0x5805, 0x3f },
 289         { 0x5806, 0x0b },
 290         { 0x5807, 0x06 },
 291         { 0x5808, 0x04 },
 292         { 0x5809, 0x04 },
 293         { 0x580a, 0x06 },
 294         { 0x580b, 0x0b },
 295         { 0x580c, 0x09 },
 296         { 0x580d, 0x03 },
 297         { 0x580e, 0x00 },
 298         { 0x580f, 0x00 },
 299         { 0x5810, 0x03 },
 300         { 0x5811, 0x08 },
 301         { 0x5812, 0x0a },
 302         { 0x5813, 0x03 },
 303         { 0x5814, 0x00 },
 304         { 0x5815, 0x00 },
 305         { 0x5816, 0x04 },
 306         { 0x5817, 0x09 },
 307         { 0x5818, 0x0f },
 308         { 0x5819, 0x08 },
 309         { 0x581a, 0x06 },
 310         { 0x581b, 0x06 },
 311         { 0x581c, 0x08 },
 312         { 0x581d, 0x0c },
 313         { 0x581e, 0x3f },
 314         { 0x581f, 0x1e },
 315         { 0x5820, 0x12 },
 316         { 0x5821, 0x13 },
 317         { 0x5822, 0x21 },
 318         { 0x5823, 0x3f },
 319         { 0x5824, 0x68 },
 320         { 0x5825, 0x28 },
 321         { 0x5826, 0x2c },
 322         { 0x5827, 0x28 },
 323         { 0x5828, 0x08 },
 324         { 0x5829, 0x48 },
 325         { 0x582a, 0x64 },
 326         { 0x582b, 0x62 },
 327         { 0x582c, 0x64 },
 328         { 0x582d, 0x28 },
 329         { 0x582e, 0x46 },
 330         { 0x582f, 0x62 },
 331         { 0x5830, 0x60 },
 332         { 0x5831, 0x62 },
 333         { 0x5832, 0x26 },
 334         { 0x5833, 0x48 },
 335         { 0x5834, 0x66 },
 336         { 0x5835, 0x44 },
 337         { 0x5836, 0x64 },
 338         { 0x5837, 0x28 },
 339         { 0x5838, 0x66 },
 340         { 0x5839, 0x48 },
 341         { 0x583a, 0x2c },
 342         { 0x583b, 0x28 },
 343         { 0x583c, 0x26 },
 344         { 0x583d, 0xae },
 345         { 0x5025, 0x00 },
 346         { 0x3a0f, 0x30 },
 347         { 0x3a10, 0x28 },
 348         { 0x3a1b, 0x30 },
 349         { 0x3a1e, 0x26 },
 350         { 0x3a11, 0x60 },
 351         { 0x3a1f, 0x14 },
 352         { 0x0601, 0x02 },
 353         { 0x3008, 0x42 },
 354         { 0x3008, 0x02 },
 355         { OV5645_IO_MIPI_CTRL00, 0x40 },
 356         { OV5645_MIPI_CTRL00, 0x24 },
 357         { OV5645_PAD_OUTPUT00, 0x70 }
 358 };
 359
 360 static const struct reg_value ov5645_setting_sxga[] = {
 361         { 0x3612, 0xa9 },
 362         { 0x3614, 0x50 },
 363         { 0x3618, 0x00 },
 364         { 0x3034, 0x18 },
 365         { 0x3035, 0x21 },
 366         { 0x3036, 0x70 },
 367         { 0x3600, 0x09 },
 368         { 0x3601, 0x43 },
 369         { 0x3708, 0x66 },
 370         { 0x370c, 0xc3 },
 371         { 0x3800, 0x00 },
 372         { 0x3801, 0x00 },
 373         { 0x3802, 0x00 },
 374         { 0x3803, 0x06 },
 375         { 0x3804, 0x0a },
 376         { 0x3805, 0x3f },
 377         { 0x3806, 0x07 },
 378         { 0x3807, 0x9d },
 379         { 0x3808, 0x05 },
 380         { 0x3809, 0x00 },
 381         { 0x380a, 0x03 },
 382         { 0x380b, 0xc0 },
 383         { 0x380c, 0x07 },
 384         { 0x380d, 0x68 },
 385         { 0x380e, 0x03 },
 386         { 0x380f, 0xd8 },
 387         { 0x3813, 0x06 },
 388         { 0x3814, 0x31 },
 389         { 0x3815, 0x31 },
 390         { 0x3820, 0x47 },
 391         { 0x3a02, 0x03 },
 392         { 0x3a03, 0xd8 },
 393         { 0x3a08, 0x01 },
 394         { 0x3a09, 0xf8 },
 395         { 0x3a0a, 0x01 },
 396         { 0x3a0b, 0xa4 },
 397         { 0x3a0e, 0x02 },
 398         { 0x3a0d, 0x02 },
 399         { 0x3a14, 0x03 },
 400         { 0x3a15, 0xd8 },
 401         { 0x3a18, 0x00 },
 402         { 0x4004, 0x02 },
 403         { 0x4005, 0x18 },
 404         { 0x4300, 0x32 },
 405         { 0x4202, 0x00 }
 406 };
 407
 408 static const struct reg_value ov5645_setting_1080p[] = {
 409         { 0x3612, 0xab },
 410         { 0x3614, 0x50 },
 411         { 0x3618, 0x04 },
 412         { 0x3034, 0x18 },
 413         { 0x3035, 0x11 },
 414         { 0x3036, 0x54 },
 415         { 0x3600, 0x08 },
 416         { 0x3601, 0x33 },
 417         { 0x3708, 0x63 },
 418         { 0x370c, 0xc0 },
 419         { 0x3800, 0x01 },
 420         { 0x3801, 0x50 },
 421         { 0x3802, 0x01 },
 422         { 0x3803, 0xb2 },
 423         { 0x3804, 0x08 },
 424         { 0x3805, 0xef },
 425         { 0x3806, 0x05 },
 426         { 0x3807, 0xf1 },
 427         { 0x3808, 0x07 },
 428         { 0x3809, 0x80 },
 429         { 0x380a, 0x04 },
 430         { 0x380b, 0x38 },
 431         { 0x380c, 0x09 },
 432         { 0x380d, 0xc4 },
 433         { 0x380e, 0x04 },
 434         { 0x380f, 0x60 },
 435         { 0x3813, 0x04 },
 436         { 0x3814, 0x11 },
 437         { 0x3815, 0x11 },
 438         { 0x3820, 0x47 },
 439         { 0x4514, 0x88 },
 440         { 0x3a02, 0x04 },
 441         { 0x3a03, 0x60 },
 442         { 0x3a08, 0x01 },
 443         { 0x3a09, 0x50 },
 444         { 0x3a0a, 0x01 },
 445         { 0x3a0b, 0x18 },
 446         { 0x3a0e, 0x03 },
 447         { 0x3a0d, 0x04 },
 448         { 0x3a14, 0x04 },
 449         { 0x3a15, 0x60 },
 450         { 0x3a18, 0x00 },
 451         { 0x4004, 0x06 },
 452         { 0x4005, 0x18 },
 453         { 0x4300, 0x32 },
 454         { 0x4202, 0x00 },
 455         { 0x4837, 0x0b }
 456 };
 457
 458 static const struct reg_value ov5645_setting_full[] = {
 459         { 0x3612, 0xab },
 460         { 0x3614, 0x50 },
 461         { 0x3618, 0x04 },
 462         { 0x3034, 0x18 },
 463         { 0x3035, 0x11 },
 464         { 0x3036, 0x54 },
 465         { 0x3600, 0x08 },
 466         { 0x3601, 0x33 },
 467         { 0x3708, 0x63 },
 468         { 0x370c, 0xc0 },
 469         { 0x3800, 0x00 },
 470         { 0x3801, 0x00 },
 471         { 0x3802, 0x00 },
 472         { 0x3803, 0x00 },
 473         { 0x3804, 0x0a },
 474         { 0x3805, 0x3f },
 475         { 0x3806, 0x07 },
 476         { 0x3807, 0x9f },
 477         { 0x3808, 0x0a },
 478         { 0x3809, 0x20 },
 479         { 0x380a, 0x07 },
 480         { 0x380b, 0x98 },
 481         { 0x380c, 0x0b },
 482         { 0x380d, 0x1c },
 483         { 0x380e, 0x07 },
 484         { 0x380f, 0xb0 },
 485         { 0x3813, 0x06 },
 486         { 0x3814, 0x11 },
 487         { 0x3815, 0x11 },
 488         { 0x3820, 0x47 },
 489         { 0x4514, 0x88 },
 490         { 0x3a02, 0x07 },
 491         { 0x3a03, 0xb0 },
 492         { 0x3a08, 0x01 },
 493         { 0x3a09, 0x27 },
 494         { 0x3a0a, 0x00 },
 495         { 0x3a0b, 0xf6 },
 496         { 0x3a0e, 0x06 },
 497         { 0x3a0d, 0x08 },
 498         { 0x3a14, 0x07 },
 499         { 0x3a15, 0xb0 },
 500         { 0x3a18, 0x01 },
 501         { 0x4004, 0x06 },
 502         { 0x4005, 0x18 },
 503         { 0x4300, 0x32 },
 504         { 0x4837, 0x0b },
 505         { 0x4202, 0x00 }
 506 };
 507
 508 static const s64 link_freq[] = {
 509         224000000,
 510         336000000
 511 };
 512
 513 static const struct ov5645_mode_info ov5645_mode_info_data[] = {
 514         {
 515                 .width = 1280,
 516                 .height = 960,
 517                 .data = ov5645_setting_sxga,
 518                 .data_size = ARRAY_SIZE(ov5645_setting_sxga),
 519                 .pixel_clock = 112000000,
 520                 .link_freq = 0 /* an index in link_freq[] */
 521         },
 522         {
 523                 .width = 1920,
 524                 .height = 1080,
 525                 .data = ov5645_setting_1080p,
 526                 .data_size = ARRAY_SIZE(ov5645_setting_1080p),
 527                 .pixel_clock = 168000000,
 528                 .link_freq = 1 /* an index in link_freq[] */
 529         },
 530         {
 531                 .width = 2592,
 532                 .height = 1944,
 533                 .data = ov5645_setting_full,
 534                 .data_size = ARRAY_SIZE(ov5645_setting_full),
 535                 .pixel_clock = 168000000,
 536                 .link_freq = 1 /* an index in link_freq[] */
 537         },
 538 };
 539
 540 static int ov5645_write_reg(struct ov5645 *ov5645, u16 reg, u8 val)
 541 {
 542         u8 regbuf[3];
 543         int ret;
 544
 545         regbuf[0] = reg >> 8;
 546         regbuf[1] = reg & 0xff;
 547         regbuf[2] = val;
 548
 549         ret = i2c_master_send(ov5645->i2c_client, regbuf, 3);
 550         if (ret < 0) {
 551                 dev_err(ov5645->dev, "%s: write reg error %d: reg=%x, val=%x\n",
 552                         __func__, ret, reg, val);
 553                 return ret;
 554         }
 555
 556         return 0;
 557 }
 558
 559 static int ov5645_read_reg(struct ov5645 *ov5645, u16 reg, u8 *val)
 560 {
 561         u8 regbuf[2];
 562         int ret;
 563
 564         regbuf[0] = reg >> 8;
 565         regbuf[1] = reg & 0xff;
 566
 567         ret = i2c_master_send(ov5645->i2c_client, regbuf, 2);
 568         if (ret < 0) {
 569                 dev_err(ov5645->dev, "%s: write reg error %d: reg=%x\n",
 570                         __func__, ret, reg);
 571                 return ret;
 572         }
 573
 574         ret = i2c_master_recv(ov5645->i2c_client, val, 1);
 575         if (ret < 0) {
 576                 dev_err(ov5645->dev, "%s: read reg error %d: reg=%x\n",
 577                         __func__, ret, reg);
 578                 return ret;
 579         }
 580
 581         return 0;
 582 }
 583
 584 static int ov5645_set_aec_mode(struct ov5645 *ov5645, u32 mode)
 585 {
 586         u8 val = ov5645->aec_pk_manual;
 587         int ret;
 588
 589         if (mode == V4L2_EXPOSURE_AUTO)
 590                 val &= ~OV5645_AEC_MANUAL_ENABLE;
 591         else /* V4L2_EXPOSURE_MANUAL */
 592                 val |= OV5645_AEC_MANUAL_ENABLE;
 593
 594         ret = ov5645_write_reg(ov5645, OV5645_AEC_PK_MANUAL, val);
 595         if (!ret)
 596                 ov5645->aec_pk_manual = val;
 597
 598         return ret;
 599 }
 600
 601 static int ov5645_set_agc_mode(struct ov5645 *ov5645, u32 enable)
 602 {
 603         u8 val = ov5645->aec_pk_manual;
 604         int ret;
 605
 606         if (enable)
 607                 val &= ~OV5645_AGC_MANUAL_ENABLE;
 608         else
 609                 val |= OV5645_AGC_MANUAL_ENABLE;
 610
 611         ret = ov5645_write_reg(ov5645, OV5645_AEC_PK_MANUAL, val);
 612         if (!ret)
 613                 ov5645->aec_pk_manual = val;
 614
 615         return ret;
 616 }
 617
 618 static int ov5645_set_register_array(struct ov5645 *ov5645,
 619                                      const struct reg_value *settings,
 620                                      unsigned int num_settings)
 621 {
 622         unsigned int i;
 623         int ret;
 624
 625         for (i = 0; i < num_settings; ++i, ++settings) {
 626                 ret = ov5645_write_reg(ov5645, settings->reg, settings->val);
 627                 if (ret < 0)
 628                         return ret;
 629
 630                 if (settings->reg == OV5645_SYSTEM_CTRL0 &&
 631                     settings->val == OV5645_SYSTEM_CTRL0_START)
 632                         usleep_range(1000, 2000);
 633         }
 634
 635         return 0;
 636 }
 637
 638 static void __ov5645_set_power_off(struct device *dev)
 639 {
 640         struct v4l2_subdev *sd = dev_get_drvdata(dev);
 641         struct ov5645 *ov5645 = to_ov5645(sd);
 642
 643         ov5645_write_reg(ov5645, OV5645_IO_MIPI_CTRL00, 0x58);
 644         gpiod_set_value_cansleep(ov5645->rst_gpio, 1);
 645         gpiod_set_value_cansleep(ov5645->enable_gpio, 0);
 646         regulator_bulk_disable(OV5645_NUM_SUPPLIES, ov5645->supplies);
 647 }
 648
 649 static int ov5645_set_power_off(struct device *dev)
 650 {
 651         struct v4l2_subdev *sd = dev_get_drvdata(dev);
 652         struct ov5645 *ov5645 = to_ov5645(sd);
 653
 654         __ov5645_set_power_off(dev);
 655         clk_disable_unprepare(ov5645->xclk);
 656
 657         return 0;
 658 }
 659
 660 static int ov5645_set_power_on(struct device *dev)
 661 {
 662         struct v4l2_subdev *sd = dev_get_drvdata(dev);
 663         struct ov5645 *ov5645 = to_ov5645(sd);
 664         int ret;
 665
 666         ret = regulator_bulk_enable(OV5645_NUM_SUPPLIES, ov5645->supplies);
 667         if (ret < 0)
 668                 return ret;
 669
 670         ret = clk_prepare_enable(ov5645->xclk);
 671         if (ret < 0) {
 672                 dev_err(ov5645->dev, "clk prepare enable failed\n");
 673                 regulator_bulk_disable(OV5645_NUM_SUPPLIES, ov5645->supplies);
 674                 return ret;
 675         }
 676
 677         usleep_range(5000, 15000);
 678         gpiod_set_value_cansleep(ov5645->enable_gpio, 1);
 679
 680         usleep_range(1000, 2000);
 681         gpiod_set_value_cansleep(ov5645->rst_gpio, 0);
 682
 683         msleep(20);
 684
 685         ret = ov5645_set_register_array(ov5645, ov5645_global_init_setting,
 686                                         ARRAY_SIZE(ov5645_global_init_setting));
 687         if (ret < 0) {
 688                 dev_err(ov5645->dev, "could not set init registers\n");
 689                 goto exit;
 690         }
 691
 692         usleep_range(500, 1000);
 693
 694         return 0;
 695
 696 exit:
 697         __ov5645_set_power_off(dev);
 698         clk_disable_unprepare(ov5645->xclk);
 699         return ret;
 700 }
 701
 702 static int ov5645_set_saturation(struct ov5645 *ov5645, s32 value)
 703 {
 704         u32 reg_value = (value * 0x10) + 0x40;
 705         int ret;
 706
 707         ret = ov5645_write_reg(ov5645, OV5645_SDE_SAT_U, reg_value);
 708         if (ret < 0)
 709                 return ret;
 710
 711         return ov5645_write_reg(ov5645, OV5645_SDE_SAT_V, reg_value);
 712 }
 713
 714 static int ov5645_set_hflip(struct ov5645 *ov5645, s32 value)
 715 {
 716         u8 val = ov5645->timing_tc_reg21;
 717         int ret;
 718
 719         if (value == 0)
 720                 val &= ~(OV5645_SENSOR_MIRROR);
 721         else
 722                 val |= (OV5645_SENSOR_MIRROR);
 723
 724         ret = ov5645_write_reg(ov5645, OV5645_TIMING_TC_REG21, val);
 725         if (!ret)
 726                 ov5645->timing_tc_reg21 = val;
 727
 728         return ret;
 729 }
 730
 731 static int ov5645_set_vflip(struct ov5645 *ov5645, s32 value)
 732 {
 733         u8 val = ov5645->timing_tc_reg20;
 734         int ret;
 735
 736         if (value == 0)
 737                 val |= (OV5645_SENSOR_VFLIP | OV5645_ISP_VFLIP);
 738         else
 739                 val &= ~(OV5645_SENSOR_VFLIP | OV5645_ISP_VFLIP);
 740
 741         ret = ov5645_write_reg(ov5645, OV5645_TIMING_TC_REG20, val);
 742         if (!ret)
 743                 ov5645->timing_tc_reg20 = val;
 744
 745         return ret;
 746 }
 747
 748 static int ov5645_set_test_pattern(struct ov5645 *ov5645, s32 value)
 749 {
 750         u8 val = 0;
 751
 752         if (value) {
 753                 val = OV5645_SET_TEST_PATTERN(value - 1);
 754                 val |= OV5645_TEST_PATTERN_ENABLE;
 755         }
 756
 757         return ov5645_write_reg(ov5645, OV5645_PRE_ISP_TEST_SETTING_1, val);
 758 }
 759
 760 static const char * const ov5645_test_pattern_menu[] = {
 761         "Disabled",
 762         "Vertical Color Bars",
 763         "Pseudo-Random Data",
 764         "Color Square",
 765         "Black Image",
 766 };
 767
 768 static int ov5645_set_awb(struct ov5645 *ov5645, s32 enable_auto)
 769 {
 770         u8 val = 0;
 771
 772         if (!enable_auto)
 773                 val = OV5645_AWB_MANUAL_ENABLE;
 774
 775         return ov5645_write_reg(ov5645, OV5645_AWB_MANUAL_CONTROL, val);
 776 }
 777
 778 static int ov5645_s_ctrl(struct v4l2_ctrl *ctrl)
 779 {
 780         struct ov5645 *ov5645 = container_of(ctrl->handler,
 781                                              struct ov5645, ctrls);
 782         int ret;
 783
 784         mutex_lock(&ov5645->power_lock);
 785         if (!pm_runtime_get_if_in_use(ov5645->dev)) {
 786                 mutex_unlock(&ov5645->power_lock);
 787                 return 0;
 788         }
 789
 790         switch (ctrl->id) {
 791         case V4L2_CID_SATURATION:
 792                 ret = ov5645_set_saturation(ov5645, ctrl->val);
 793                 break;
 794         case V4L2_CID_AUTO_WHITE_BALANCE:
 795                 ret = ov5645_set_awb(ov5645, ctrl->val);
 796                 break;
 797         case V4L2_CID_AUTOGAIN:
 798                 ret = ov5645_set_agc_mode(ov5645, ctrl->val);
 799                 break;
 800         case V4L2_CID_EXPOSURE_AUTO:
 801                 ret = ov5645_set_aec_mode(ov5645, ctrl->val);
 802                 break;
 803         case V4L2_CID_TEST_PATTERN:
 804                 ret = ov5645_set_test_pattern(ov5645, ctrl->val);
 805                 break;
 806         case V4L2_CID_HFLIP:
 807                 ret = ov5645_set_hflip(ov5645, ctrl->val);
 808                 break;
 809         case V4L2_CID_VFLIP:
 810                 ret = ov5645_set_vflip(ov5645, ctrl->val);
 811                 break;
 812         default:
 813                 ret = -EINVAL;
 814                 break;
 815         }
 816
 817         pm_runtime_mark_last_busy(ov5645->dev);
 818         pm_runtime_put_autosuspend(ov5645->dev);
 819         mutex_unlock(&ov5645->power_lock);
 820
 821         return ret;
 822 }
 823
 824 static const struct v4l2_ctrl_ops ov5645_ctrl_ops = {
 825         .s_ctrl = ov5645_s_ctrl,
 826 };
 827
 828 static int ov5645_enum_mbus_code(struct v4l2_subdev *sd,
 829                                  struct v4l2_subdev_state *sd_state,
 830                                  struct v4l2_subdev_mbus_code_enum *code)
 831 {
 832         if (code->index > 0)
 833                 return -EINVAL;
 834
 835         code->code = MEDIA_BUS_FMT_UYVY8_1X16;
 836
 837         return 0;
 838 }
 839
 840 static int ov5645_enum_frame_size(struct v4l2_subdev *subdev,
 841                                   struct v4l2_subdev_state *sd_state,
 842                                   struct v4l2_subdev_frame_size_enum *fse)
 843 {
 844         if (fse->code != MEDIA_BUS_FMT_UYVY8_1X16)
 845                 return -EINVAL;
 846
 847         if (fse->index >= ARRAY_SIZE(ov5645_mode_info_data))
 848                 return -EINVAL;
 849
 850         fse->min_width = ov5645_mode_info_data[fse->index].width;
 851         fse->max_width = ov5645_mode_info_data[fse->index].width;
 852         fse->min_height = ov5645_mode_info_data[fse->index].height;
 853         fse->max_height = ov5645_mode_info_data[fse->index].height;
 854
 855         return 0;
 856 }
 857
 858 static struct v4l2_mbus_framefmt *
 859 __ov5645_get_pad_format(struct ov5645 *ov5645,
 860                         struct v4l2_subdev_state *sd_state,
 861                         unsigned int pad,
 862                         enum v4l2_subdev_format_whence which)
 863 {
 864         switch (which) {
 865         case V4L2_SUBDEV_FORMAT_TRY:
 866                 return v4l2_subdev_state_get_format(sd_state, pad);
 867         case V4L2_SUBDEV_FORMAT_ACTIVE:
 868                 return &ov5645->fmt;
 869         default:
 870                 return NULL;
 871         }
 872 }
 873
 874 static int ov5645_get_format(struct v4l2_subdev *sd,
 875                              struct v4l2_subdev_state *sd_state,
 876                              struct v4l2_subdev_format *format)
 877 {
 878         struct ov5645 *ov5645 = to_ov5645(sd);
 879
 880         format->format = *__ov5645_get_pad_format(ov5645, sd_state,
 881                                                   format->pad,
 882                                                   format->which);
 883         return 0;
 884 }
 885
 886 static struct v4l2_rect *
 887 __ov5645_get_pad_crop(struct ov5645 *ov5645,
 888                       struct v4l2_subdev_state *sd_state,
 889                       unsigned int pad, enum v4l2_subdev_format_whence which)
 890 {
 891         switch (which) {
 892         case V4L2_SUBDEV_FORMAT_TRY:
 893                 return v4l2_subdev_state_get_crop(sd_state, pad);
 894         case V4L2_SUBDEV_FORMAT_ACTIVE:
 895                 return &ov5645->crop;
 896         default:
 897                 return NULL;
 898         }
 899 }
 900
 901 static int ov5645_set_format(struct v4l2_subdev *sd,
 902                              struct v4l2_subdev_state *sd_state,
 903                              struct v4l2_subdev_format *format)
 904 {
 905         struct ov5645 *ov5645 = to_ov5645(sd);
 906         struct v4l2_mbus_framefmt *__format;
 907         struct v4l2_rect *__crop;
 908         const struct ov5645_mode_info *new_mode;
 909         int ret;
 910
 911         __crop = __ov5645_get_pad_crop(ov5645, sd_state, format->pad,
 912                                        format->which);
 913
 914         new_mode = v4l2_find_nearest_size(ov5645_mode_info_data,
 915                                ARRAY_SIZE(ov5645_mode_info_data),
 916                                width, height,
 917                                format->format.width, format->format.height);
 918
 919         __crop->width = new_mode->width;
 920         __crop->height = new_mode->height;
 921
 922         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
 923                 ret = v4l2_ctrl_s_ctrl_int64(ov5645->pixel_clock,
 924                                              new_mode->pixel_clock);
 925                 if (ret < 0)
 926                         return ret;
 927
 928                 ret = v4l2_ctrl_s_ctrl(ov5645->link_freq,
 929                                        new_mode->link_freq);
 930                 if (ret < 0)
 931                         return ret;
 932
 933                 ov5645->current_mode = new_mode;
 934         }
 935
 936         __format = __ov5645_get_pad_format(ov5645, sd_state, format->pad,
 937                                            format->which);
 938         __format->width = __crop->width;
 939         __format->height = __crop->height;
 940         __format->code = MEDIA_BUS_FMT_UYVY8_1X16;
 941         __format->field = V4L2_FIELD_NONE;
 942         __format->colorspace = V4L2_COLORSPACE_SRGB;
 943
 944         format->format = *__format;
 945
 946         return 0;
 947 }
 948
 949 static int ov5645_init_state(struct v4l2_subdev *subdev,
 950                              struct v4l2_subdev_state *sd_state)
 951 {
 952         struct v4l2_subdev_format fmt = { 0 };
 953
 954         fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 955         fmt.format.width = 1920;
 956         fmt.format.height = 1080;
 957
 958         ov5645_set_format(subdev, sd_state, &fmt);
 959
 960         return 0;
 961 }
 962
 963 static int ov5645_get_selection(struct v4l2_subdev *sd,
 964                            struct v4l2_subdev_state *sd_state,
 965                            struct v4l2_subdev_selection *sel)
 966 {
 967         struct ov5645 *ov5645 = to_ov5645(sd);
 968
 969         if (sel->target != V4L2_SEL_TGT_CROP)
 970                 return -EINVAL;
 971
 972         sel->r = *__ov5645_get_pad_crop(ov5645, sd_state, sel->pad,
 973                                         sel->which);
 974         return 0;
 975 }
 976
 977 static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable)
 978 {
 979         struct ov5645 *ov5645 = to_ov5645(subdev);
 980         int ret;
 981
 982         if (enable) {
 983                 ret = pm_runtime_resume_and_get(ov5645->dev);
 984                 if (ret < 0)
 985                         return ret;
 986
 987                 ret = ov5645_set_register_array(ov5645,
 988                                         ov5645->current_mode->data,
 989                                         ov5645->current_mode->data_size);
 990                 if (ret < 0) {
 991                         dev_err(ov5645->dev, "could not set mode %dx%d\n",
 992                                 ov5645->current_mode->width,
 993                                 ov5645->current_mode->height);
 994                         goto err_rpm_put;
 995                 }
 996                 ret = v4l2_ctrl_handler_setup(&ov5645->ctrls);
 997                 if (ret < 0) {
 998                         dev_err(ov5645->dev, "could not sync v4l2 controls\n");
 999                         goto err_rpm_put;
1000                 }
1001
1002                 ret = ov5645_write_reg(ov5645, OV5645_IO_MIPI_CTRL00, 0x45);
1003                 if (ret < 0)
1004                         goto err_rpm_put;
1005
1006                 ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
1007                                        OV5645_SYSTEM_CTRL0_START);
1008                 if (ret < 0)
1009                         goto err_rpm_put;
1010         } else {
1011                 ret = ov5645_write_reg(ov5645, OV5645_IO_MIPI_CTRL00, 0x40);
1012                 if (ret < 0)
1013                         goto stream_off_rpm_put;
1014
1015                 ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
1016                                        OV5645_SYSTEM_CTRL0_STOP);
1017
1018                 goto stream_off_rpm_put;
1019         }
1020
1021         return 0;
1022
1023 err_rpm_put:
1024         pm_runtime_put_sync(ov5645->dev);
1025         return ret;
1026
1027 stream_off_rpm_put:
1028         pm_runtime_mark_last_busy(ov5645->dev);
1029         pm_runtime_put_autosuspend(ov5645->dev);
1030         return ret;
1031 }
1032
1033 static const struct v4l2_subdev_video_ops ov5645_video_ops = {
1034         .s_stream = ov5645_s_stream,
1035 };
1036
1037 static const struct v4l2_subdev_pad_ops ov5645_subdev_pad_ops = {
1038         .enum_mbus_code = ov5645_enum_mbus_code,
1039         .enum_frame_size = ov5645_enum_frame_size,
1040         .get_fmt = ov5645_get_format,
1041         .set_fmt = ov5645_set_format,
1042         .get_selection = ov5645_get_selection,
1043 };
1044
1045 static const struct v4l2_subdev_ops ov5645_subdev_ops = {
1046         .video = &ov5645_video_ops,
1047         .pad = &ov5645_subdev_pad_ops,
1048 };
1049
1050 static const struct v4l2_subdev_internal_ops ov5645_internal_ops = {
1051         .init_state = ov5645_init_state,
1052 };
1053
1054 static int ov5645_probe(struct i2c_client *client)
1055 {
1056         struct device *dev = &client->dev;
1057         struct device_node *endpoint;
1058         struct ov5645 *ov5645;
1059         u8 chip_id_high, chip_id_low;
1060         unsigned int i;
1061         u32 xclk_freq;
1062         int ret;
1063
1064         ov5645 = devm_kzalloc(dev, sizeof(struct ov5645), GFP_KERNEL);
1065         if (!ov5645)
1066                 return -ENOMEM;
1067
1068         ov5645->i2c_client = client;
1069         ov5645->dev = dev;
1070
1071         endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
1072         if (!endpoint) {
1073                 dev_err(dev, "endpoint node not found\n");
1074                 return -EINVAL;
1075         }
1076
1077         ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(endpoint),
1078                                          &ov5645->ep);
1079
1080         of_node_put(endpoint);
1081
1082         if (ret < 0) {
1083                 dev_err(dev, "parsing endpoint node failed\n");
1084                 return ret;
1085         }
1086
1087         if (ov5645->ep.bus_type != V4L2_MBUS_CSI2_DPHY) {
1088                 dev_err(dev, "invalid bus type, must be CSI2\n");
1089                 return -EINVAL;
1090         }
1091
1092         /* get system clock (xclk) */
1093         ov5645->xclk = devm_clk_get(dev, NULL);
1094         if (IS_ERR(ov5645->xclk)) {
1095                 dev_err(dev, "could not get xclk");
1096                 return PTR_ERR(ov5645->xclk);
1097         }
1098
1099         ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq);
1100         if (ret) {
1101                 dev_err(dev, "could not get xclk frequency\n");
1102                 return ret;
1103         }
1104
1105         /* external clock must be 24MHz, allow 1% tolerance */
1106         if (xclk_freq < 23760000 || xclk_freq > 24240000) {
1107                 dev_err(dev, "external clock frequency %u is not supported\n",
1108                         xclk_freq);
1109                 return -EINVAL;
1110         }
1111
1112         ret = clk_set_rate(ov5645->xclk, xclk_freq);
1113         if (ret) {
1114                 dev_err(dev, "could not set xclk frequency\n");
1115                 return ret;
1116         }
1117
1118         for (i = 0; i < OV5645_NUM_SUPPLIES; i++)
1119                 ov5645->supplies[i].supply = ov5645_supply_name[i];
1120
1121         ret = devm_regulator_bulk_get(dev, OV5645_NUM_SUPPLIES,
1122                                       ov5645->supplies);
1123         if (ret < 0)
1124                 return ret;
1125
1126         ov5645->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH);
1127         if (IS_ERR(ov5645->enable_gpio)) {
1128                 dev_err(dev, "cannot get enable gpio\n");
1129                 return PTR_ERR(ov5645->enable_gpio);
1130         }
1131
1132         ov5645->rst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
1133         if (IS_ERR(ov5645->rst_gpio)) {
1134                 dev_err(dev, "cannot get reset gpio\n");
1135                 return PTR_ERR(ov5645->rst_gpio);
1136         }
1137
1138         mutex_init(&ov5645->power_lock);
1139
1140         v4l2_ctrl_handler_init(&ov5645->ctrls, 9);
1141         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1142                           V4L2_CID_SATURATION, -4, 4, 1, 0);
1143         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1144                           V4L2_CID_HFLIP, 0, 1, 1, 0);
1145         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1146                           V4L2_CID_VFLIP, 0, 1, 1, 0);
1147         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1148                           V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
1149         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1150                           V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1151         v4l2_ctrl_new_std_menu(&ov5645->ctrls, &ov5645_ctrl_ops,
1152                                V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL,
1153                                0, V4L2_EXPOSURE_AUTO);
1154         v4l2_ctrl_new_std_menu_items(&ov5645->ctrls, &ov5645_ctrl_ops,
1155                                      V4L2_CID_TEST_PATTERN,
1156                                      ARRAY_SIZE(ov5645_test_pattern_menu) - 1,
1157                                      0, 0, ov5645_test_pattern_menu);
1158         ov5645->pixel_clock = v4l2_ctrl_new_std(&ov5645->ctrls,
1159                                                 &ov5645_ctrl_ops,
1160                                                 V4L2_CID_PIXEL_RATE,
1161                                                 1, INT_MAX, 1, 1);
1162         ov5645->link_freq = v4l2_ctrl_new_int_menu(&ov5645->ctrls,
1163                                                    &ov5645_ctrl_ops,
1164                                                    V4L2_CID_LINK_FREQ,
1165                                                    ARRAY_SIZE(link_freq) - 1,
1166                                                    0, link_freq);
1167         if (ov5645->link_freq)
1168                 ov5645->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1169
1170         ov5645->sd.ctrl_handler = &ov5645->ctrls;
1171
1172         if (ov5645->ctrls.error) {
1173                 dev_err(dev, "%s: control initialization error %d\n",
1174                        __func__, ov5645->ctrls.error);
1175                 ret = ov5645->ctrls.error;
1176                 goto free_ctrl;
1177         }
1178
1179         v4l2_i2c_subdev_init(&ov5645->sd, client, &ov5645_subdev_ops);
1180         ov5645->sd.internal_ops = &ov5645_internal_ops;
1181         ov5645->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1182         ov5645->pad.flags = MEDIA_PAD_FL_SOURCE;
1183         ov5645->sd.dev = &client->dev;
1184         ov5645->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1185
1186         ret = media_entity_pads_init(&ov5645->sd.entity, 1, &ov5645->pad);
1187         if (ret < 0) {
1188                 dev_err(dev, "could not register media entity\n");
1189                 goto free_ctrl;
1190         }
1191
1192         ret = ov5645_set_power_on(dev);
1193         if (ret)
1194                 goto free_entity;
1195
1196         ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_HIGH, &chip_id_high);
1197         if (ret < 0 || chip_id_high != OV5645_CHIP_ID_HIGH_BYTE) {
1198                 dev_err(dev, "could not read ID high\n");
1199                 ret = -ENODEV;
1200                 goto power_down;
1201         }
1202         ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_LOW, &chip_id_low);
1203         if (ret < 0 || chip_id_low != OV5645_CHIP_ID_LOW_BYTE) {
1204                 dev_err(dev, "could not read ID low\n");
1205                 ret = -ENODEV;
1206                 goto power_down;
1207         }
1208
1209         dev_info(dev, "OV5645 detected at address 0x%02x\n", client->addr);
1210
1211         ret = ov5645_read_reg(ov5645, OV5645_AEC_PK_MANUAL,
1212                               &ov5645->aec_pk_manual);
1213         if (ret < 0) {
1214                 dev_err(dev, "could not read AEC/AGC mode\n");
1215                 ret = -ENODEV;
1216                 goto power_down;
1217         }
1218
1219         ret = ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG20,
1220                               &ov5645->timing_tc_reg20);
1221         if (ret < 0) {
1222                 dev_err(dev, "could not read vflip value\n");
1223                 ret = -ENODEV;
1224                 goto power_down;
1225         }
1226
1227         ret = ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG21,
1228                               &ov5645->timing_tc_reg21);
1229         if (ret < 0) {
1230                 dev_err(dev, "could not read hflip value\n");
1231                 ret = -ENODEV;
1232                 goto power_down;
1233         }
1234
1235         pm_runtime_set_active(dev);
1236         pm_runtime_get_noresume(dev);
1237         pm_runtime_enable(dev);
1238
1239         ov5645_init_state(&ov5645->sd, NULL);
1240
1241         ret = v4l2_async_register_subdev(&ov5645->sd);
1242         if (ret < 0) {
1243                 dev_err(dev, "could not register v4l2 device\n");
1244                 goto err_pm_runtime;
1245         }
1246
1247         pm_runtime_set_autosuspend_delay(dev, 1000);
1248         pm_runtime_use_autosuspend(dev);
1249         pm_runtime_mark_last_busy(dev);
1250         pm_runtime_put_autosuspend(dev);
1251
1252         return 0;
1253
1254 err_pm_runtime:
1255         pm_runtime_disable(dev);
1256         pm_runtime_put_noidle(dev);
1257 power_down:
1258         ov5645_set_power_off(dev);
1259 free_entity:
1260         media_entity_cleanup(&ov5645->sd.entity);
1261 free_ctrl:
1262         v4l2_ctrl_handler_free(&ov5645->ctrls);
1263         mutex_destroy(&ov5645->power_lock);
1264
1265         return ret;
1266 }
1267
1268 static void ov5645_remove(struct i2c_client *client)
1269 {
1270         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1271         struct ov5645 *ov5645 = to_ov5645(sd);
1272
1273         v4l2_async_unregister_subdev(&ov5645->sd);
1274         media_entity_cleanup(&ov5645->sd.entity);
1275         v4l2_ctrl_handler_free(&ov5645->ctrls);
1276         pm_runtime_disable(ov5645->dev);
1277         if (!pm_runtime_status_suspended(ov5645->dev))
1278                 ov5645_set_power_off(ov5645->dev);
1279         pm_runtime_set_suspended(ov5645->dev);
1280         mutex_destroy(&ov5645->power_lock);
1281 }
1282
1283 static const struct i2c_device_id ov5645_id[] = {
1284         { "ov5645" },
1285         {}
1286 };
1287 MODULE_DEVICE_TABLE(i2c, ov5645_id);
1288
1289 static const struct of_device_id ov5645_of_match[] = {
1290         { .compatible = "ovti,ov5645" },
1291         { /* sentinel */ }
1292 };
1293 MODULE_DEVICE_TABLE(of, ov5645_of_match);
1294
1295 static const struct dev_pm_ops ov5645_pm_ops = {
1296         SET_RUNTIME_PM_OPS(ov5645_set_power_off, ov5645_set_power_on, NULL)
1297 };
1298
1299 static struct i2c_driver ov5645_i2c_driver = {
1300         .driver = {
1301                 .of_match_table = ov5645_of_match,
1302                 .name  = "ov5645",
1303                 .pm = &ov5645_pm_ops,
1304         },
1305         .probe = ov5645_probe,
1306         .remove = ov5645_remove,
1307         .id_table = ov5645_id,
1308 };
1309
1310 module_i2c_driver(ov5645_i2c_driver);
1311
1312 MODULE_DESCRIPTION("Omnivision OV5645 Camera Driver");
1313 MODULE_AUTHOR("Todor Tomov <[email protected]>");
1314 MODULE_LICENSE("GPL v2");