drivers/media/i2c/ov5645.c

   1 /*
   2  * Driver for the OV5645 camera sensor.
   3  *
   4  * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
   5  * Copyright (C) 2015 By Tech Design S.L. All Rights Reserved.
   6  * Copyright (C) 2012-2013 Freescale Semiconductor, Inc. All Rights Reserved.
   7  *
   8  * Based on:
   9  * - the OV5645 driver from QC msm-3.10 kernel on codeaurora.org:
  10  *   https://us.codeaurora.org/cgit/quic/la/kernel/msm-3.10/tree/drivers/
  11  *       media/platform/msm/camera_v2/sensor/ov5645.c?h=LA.BR.1.2.4_rb1.41
  12  * - the OV5640 driver posted on linux-media:
  13  *   https://www.mail-archive.com/linux-media%40vger.kernel.org/msg92671.html
  14  */
  15
  16 /*
  17  * This program is free software; you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation; either version 2 of the License, or
  20  * (at your option) any later version.
  21
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  */
  27
  28 #include <linux/bitops.h>
  29 #include <linux/clk.h>
  30 #include <linux/delay.h>
  31 #include <linux/device.h>
  32 #include <linux/gpio/consumer.h>
  33 #include <linux/i2c.h>
  34 #include <linux/init.h>
  35 #include <linux/module.h>
  36 #include <linux/of.h>
  37 #include <linux/of_graph.h>
  38 #include <linux/regulator/consumer.h>
  39 #include <linux/slab.h>
  40 #include <linux/types.h>
  41 #include <media/v4l2-ctrls.h>
  42 #include <media/v4l2-fwnode.h>
  43 #include <media/v4l2-subdev.h>
  44
  45 #define OV5645_VOLTAGE_ANALOG               2800000
  46 #define OV5645_VOLTAGE_DIGITAL_CORE         1500000
  47 #define OV5645_VOLTAGE_DIGITAL_IO           1800000
  48
  49 #define OV5645_SYSTEM_CTRL0             0x3008
  50 #define         OV5645_SYSTEM_CTRL0_START       0x02
  51 #define         OV5645_SYSTEM_CTRL0_STOP        0x42
  52 #define OV5645_CHIP_ID_HIGH             0x300a
  53 #define         OV5645_CHIP_ID_HIGH_BYTE        0x56
  54 #define OV5645_CHIP_ID_LOW              0x300b
  55 #define         OV5645_CHIP_ID_LOW_BYTE         0x45
  56 #define OV5645_AWB_MANUAL_CONTROL       0x3406
  57 #define         OV5645_AWB_MANUAL_ENABLE        BIT(0)
  58 #define OV5645_AEC_PK_MANUAL            0x3503
  59 #define         OV5645_AEC_MANUAL_ENABLE        BIT(0)
  60 #define         OV5645_AGC_MANUAL_ENABLE        BIT(1)
  61 #define OV5645_TIMING_TC_REG20          0x3820
  62 #define         OV5645_SENSOR_VFLIP             BIT(1)
  63 #define         OV5645_ISP_VFLIP                BIT(2)
  64 #define OV5645_TIMING_TC_REG21          0x3821
  65 #define         OV5645_SENSOR_MIRROR            BIT(1)
  66 #define OV5645_PRE_ISP_TEST_SETTING_1   0x503d
  67 #define         OV5645_TEST_PATTERN_MASK        0x3
  68 #define         OV5645_SET_TEST_PATTERN(x)      ((x) & OV5645_TEST_PATTERN_MASK)
  69 #define         OV5645_TEST_PATTERN_ENABLE      BIT(7)
  70 #define OV5645_SDE_SAT_U                0x5583
  71 #define OV5645_SDE_SAT_V                0x5584
  72
  73 struct reg_value {
  74         u16 reg;
  75         u8 val;
  76 };
  77
  78 struct ov5645_mode_info {
  79         u32 width;
  80         u32 height;
  81         const struct reg_value *data;
  82         u32 data_size;
  83         u32 pixel_clock;
  84         u32 link_freq;
  85 };
  86
  87 struct ov5645 {
  88         struct i2c_client *i2c_client;
  89         struct device *dev;
  90         struct v4l2_subdev sd;
  91         struct media_pad pad;
  92         struct v4l2_fwnode_endpoint ep;
  93         struct v4l2_mbus_framefmt fmt;
  94         struct v4l2_rect crop;
  95         struct clk *xclk;
  96
  97         struct regulator *io_regulator;
  98         struct regulator *core_regulator;
  99         struct regulator *analog_regulator;
 100
 101         const struct ov5645_mode_info *current_mode;
 102
 103         struct v4l2_ctrl_handler ctrls;
 104         struct v4l2_ctrl *pixel_clock;
 105         struct v4l2_ctrl *link_freq;
 106
 107         /* Cached register values */
 108         u8 aec_pk_manual;
 109         u8 timing_tc_reg20;
 110         u8 timing_tc_reg21;
 111
 112         struct mutex power_lock; /* lock to protect power state */
 113         int power_count;
 114
 115         struct gpio_desc *enable_gpio;
 116         struct gpio_desc *rst_gpio;
 117 };
 118
 119 static inline struct ov5645 *to_ov5645(struct v4l2_subdev *sd)
 120 {
 121         return container_of(sd, struct ov5645, sd);
 122 }
 123
 124 static const struct reg_value ov5645_global_init_setting[] = {
 125         { 0x3103, 0x11 },
 126         { 0x3008, 0x82 },
 127         { 0x3008, 0x42 },
 128         { 0x3103, 0x03 },
 129         { 0x3503, 0x07 },
 130         { 0x3002, 0x1c },
 131         { 0x3006, 0xc3 },
 132         { 0x300e, 0x45 },
 133         { 0x3017, 0x00 },
 134         { 0x3018, 0x00 },
 135         { 0x302e, 0x0b },
 136         { 0x3037, 0x13 },
 137         { 0x3108, 0x01 },
 138         { 0x3611, 0x06 },
 139         { 0x3500, 0x00 },
 140         { 0x3501, 0x01 },
 141         { 0x3502, 0x00 },
 142         { 0x350a, 0x00 },
 143         { 0x350b, 0x3f },
 144         { 0x3620, 0x33 },
 145         { 0x3621, 0xe0 },
 146         { 0x3622, 0x01 },
 147         { 0x3630, 0x2e },
 148         { 0x3631, 0x00 },
 149         { 0x3632, 0x32 },
 150         { 0x3633, 0x52 },
 151         { 0x3634, 0x70 },
 152         { 0x3635, 0x13 },
 153         { 0x3636, 0x03 },
 154         { 0x3703, 0x5a },
 155         { 0x3704, 0xa0 },
 156         { 0x3705, 0x1a },
 157         { 0x3709, 0x12 },
 158         { 0x370b, 0x61 },
 159         { 0x370f, 0x10 },
 160         { 0x3715, 0x78 },
 161         { 0x3717, 0x01 },
 162         { 0x371b, 0x20 },
 163         { 0x3731, 0x12 },
 164         { 0x3901, 0x0a },
 165         { 0x3905, 0x02 },
 166         { 0x3906, 0x10 },
 167         { 0x3719, 0x86 },
 168         { 0x3810, 0x00 },
 169         { 0x3811, 0x10 },
 170         { 0x3812, 0x00 },
 171         { 0x3821, 0x01 },
 172         { 0x3824, 0x01 },
 173         { 0x3826, 0x03 },
 174         { 0x3828, 0x08 },
 175         { 0x3a19, 0xf8 },
 176         { 0x3c01, 0x34 },
 177         { 0x3c04, 0x28 },
 178         { 0x3c05, 0x98 },
 179         { 0x3c07, 0x07 },
 180         { 0x3c09, 0xc2 },
 181         { 0x3c0a, 0x9c },
 182         { 0x3c0b, 0x40 },
 183         { 0x3c01, 0x34 },
 184         { 0x4001, 0x02 },
 185         { 0x4514, 0x00 },
 186         { 0x4520, 0xb0 },
 187         { 0x460b, 0x37 },
 188         { 0x460c, 0x20 },
 189         { 0x4818, 0x01 },
 190         { 0x481d, 0xf0 },
 191         { 0x481f, 0x50 },
 192         { 0x4823, 0x70 },
 193         { 0x4831, 0x14 },
 194         { 0x5000, 0xa7 },
 195         { 0x5001, 0x83 },
 196         { 0x501d, 0x00 },
 197         { 0x501f, 0x00 },
 198         { 0x503d, 0x00 },
 199         { 0x505c, 0x30 },
 200         { 0x5181, 0x59 },
 201         { 0x5183, 0x00 },
 202         { 0x5191, 0xf0 },
 203         { 0x5192, 0x03 },
 204         { 0x5684, 0x10 },
 205         { 0x5685, 0xa0 },
 206         { 0x5686, 0x0c },
 207         { 0x5687, 0x78 },
 208         { 0x5a00, 0x08 },
 209         { 0x5a21, 0x00 },
 210         { 0x5a24, 0x00 },
 211         { 0x3008, 0x02 },
 212         { 0x3503, 0x00 },
 213         { 0x5180, 0xff },
 214         { 0x5181, 0xf2 },
 215         { 0x5182, 0x00 },
 216         { 0x5183, 0x14 },
 217         { 0x5184, 0x25 },
 218         { 0x5185, 0x24 },
 219         { 0x5186, 0x09 },
 220         { 0x5187, 0x09 },
 221         { 0x5188, 0x0a },
 222         { 0x5189, 0x75 },
 223         { 0x518a, 0x52 },
 224         { 0x518b, 0xea },
 225         { 0x518c, 0xa8 },
 226         { 0x518d, 0x42 },
 227         { 0x518e, 0x38 },
 228         { 0x518f, 0x56 },
 229         { 0x5190, 0x42 },
 230         { 0x5191, 0xf8 },
 231         { 0x5192, 0x04 },
 232         { 0x5193, 0x70 },
 233         { 0x5194, 0xf0 },
 234         { 0x5195, 0xf0 },
 235         { 0x5196, 0x03 },
 236         { 0x5197, 0x01 },
 237         { 0x5198, 0x04 },
 238         { 0x5199, 0x12 },
 239         { 0x519a, 0x04 },
 240         { 0x519b, 0x00 },
 241         { 0x519c, 0x06 },
 242         { 0x519d, 0x82 },
 243         { 0x519e, 0x38 },
 244         { 0x5381, 0x1e },
 245         { 0x5382, 0x5b },
 246         { 0x5383, 0x08 },
 247         { 0x5384, 0x0a },
 248         { 0x5385, 0x7e },
 249         { 0x5386, 0x88 },
 250         { 0x5387, 0x7c },
 251         { 0x5388, 0x6c },
 252         { 0x5389, 0x10 },
 253         { 0x538a, 0x01 },
 254         { 0x538b, 0x98 },
 255         { 0x5300, 0x08 },
 256         { 0x5301, 0x30 },
 257         { 0x5302, 0x10 },
 258         { 0x5303, 0x00 },
 259         { 0x5304, 0x08 },
 260         { 0x5305, 0x30 },
 261         { 0x5306, 0x08 },
 262         { 0x5307, 0x16 },
 263         { 0x5309, 0x08 },
 264         { 0x530a, 0x30 },
 265         { 0x530b, 0x04 },
 266         { 0x530c, 0x06 },
 267         { 0x5480, 0x01 },
 268         { 0x5481, 0x08 },
 269         { 0x5482, 0x14 },
 270         { 0x5483, 0x28 },
 271         { 0x5484, 0x51 },
 272         { 0x5485, 0x65 },
 273         { 0x5486, 0x71 },
 274         { 0x5487, 0x7d },
 275         { 0x5488, 0x87 },
 276         { 0x5489, 0x91 },
 277         { 0x548a, 0x9a },
 278         { 0x548b, 0xaa },
 279         { 0x548c, 0xb8 },
 280         { 0x548d, 0xcd },
 281         { 0x548e, 0xdd },
 282         { 0x548f, 0xea },
 283         { 0x5490, 0x1d },
 284         { 0x5580, 0x02 },
 285         { 0x5583, 0x40 },
 286         { 0x5584, 0x10 },
 287         { 0x5589, 0x10 },
 288         { 0x558a, 0x00 },
 289         { 0x558b, 0xf8 },
 290         { 0x5800, 0x3f },
 291         { 0x5801, 0x16 },
 292         { 0x5802, 0x0e },
 293         { 0x5803, 0x0d },
 294         { 0x5804, 0x17 },
 295         { 0x5805, 0x3f },
 296         { 0x5806, 0x0b },
 297         { 0x5807, 0x06 },
 298         { 0x5808, 0x04 },
 299         { 0x5809, 0x04 },
 300         { 0x580a, 0x06 },
 301         { 0x580b, 0x0b },
 302         { 0x580c, 0x09 },
 303         { 0x580d, 0x03 },
 304         { 0x580e, 0x00 },
 305         { 0x580f, 0x00 },
 306         { 0x5810, 0x03 },
 307         { 0x5811, 0x08 },
 308         { 0x5812, 0x0a },
 309         { 0x5813, 0x03 },
 310         { 0x5814, 0x00 },
 311         { 0x5815, 0x00 },
 312         { 0x5816, 0x04 },
 313         { 0x5817, 0x09 },
 314         { 0x5818, 0x0f },
 315         { 0x5819, 0x08 },
 316         { 0x581a, 0x06 },
 317         { 0x581b, 0x06 },
 318         { 0x581c, 0x08 },
 319         { 0x581d, 0x0c },
 320         { 0x581e, 0x3f },
 321         { 0x581f, 0x1e },
 322         { 0x5820, 0x12 },
 323         { 0x5821, 0x13 },
 324         { 0x5822, 0x21 },
 325         { 0x5823, 0x3f },
 326         { 0x5824, 0x68 },
 327         { 0x5825, 0x28 },
 328         { 0x5826, 0x2c },
 329         { 0x5827, 0x28 },
 330         { 0x5828, 0x08 },
 331         { 0x5829, 0x48 },
 332         { 0x582a, 0x64 },
 333         { 0x582b, 0x62 },
 334         { 0x582c, 0x64 },
 335         { 0x582d, 0x28 },
 336         { 0x582e, 0x46 },
 337         { 0x582f, 0x62 },
 338         { 0x5830, 0x60 },
 339         { 0x5831, 0x62 },
 340         { 0x5832, 0x26 },
 341         { 0x5833, 0x48 },
 342         { 0x5834, 0x66 },
 343         { 0x5835, 0x44 },
 344         { 0x5836, 0x64 },
 345         { 0x5837, 0x28 },
 346         { 0x5838, 0x66 },
 347         { 0x5839, 0x48 },
 348         { 0x583a, 0x2c },
 349         { 0x583b, 0x28 },
 350         { 0x583c, 0x26 },
 351         { 0x583d, 0xae },
 352         { 0x5025, 0x00 },
 353         { 0x3a0f, 0x30 },
 354         { 0x3a10, 0x28 },
 355         { 0x3a1b, 0x30 },
 356         { 0x3a1e, 0x26 },
 357         { 0x3a11, 0x60 },
 358         { 0x3a1f, 0x14 },
 359         { 0x0601, 0x02 },
 360         { 0x3008, 0x42 },
 361         { 0x3008, 0x02 }
 362 };
 363
 364 static const struct reg_value ov5645_setting_sxga[] = {
 365         { 0x3612, 0xa9 },
 366         { 0x3614, 0x50 },
 367         { 0x3618, 0x00 },
 368         { 0x3034, 0x18 },
 369         { 0x3035, 0x21 },
 370         { 0x3036, 0x70 },
 371         { 0x3600, 0x09 },
 372         { 0x3601, 0x43 },
 373         { 0x3708, 0x66 },
 374         { 0x370c, 0xc3 },
 375         { 0x3800, 0x00 },
 376         { 0x3801, 0x00 },
 377         { 0x3802, 0x00 },
 378         { 0x3803, 0x06 },
 379         { 0x3804, 0x0a },
 380         { 0x3805, 0x3f },
 381         { 0x3806, 0x07 },
 382         { 0x3807, 0x9d },
 383         { 0x3808, 0x05 },
 384         { 0x3809, 0x00 },
 385         { 0x380a, 0x03 },
 386         { 0x380b, 0xc0 },
 387         { 0x380c, 0x07 },
 388         { 0x380d, 0x68 },
 389         { 0x380e, 0x03 },
 390         { 0x380f, 0xd8 },
 391         { 0x3813, 0x06 },
 392         { 0x3814, 0x31 },
 393         { 0x3815, 0x31 },
 394         { 0x3820, 0x47 },
 395         { 0x3a02, 0x03 },
 396         { 0x3a03, 0xd8 },
 397         { 0x3a08, 0x01 },
 398         { 0x3a09, 0xf8 },
 399         { 0x3a0a, 0x01 },
 400         { 0x3a0b, 0xa4 },
 401         { 0x3a0e, 0x02 },
 402         { 0x3a0d, 0x02 },
 403         { 0x3a14, 0x03 },
 404         { 0x3a15, 0xd8 },
 405         { 0x3a18, 0x00 },
 406         { 0x4004, 0x02 },
 407         { 0x4005, 0x18 },
 408         { 0x4300, 0x32 },
 409         { 0x4202, 0x00 }
 410 };
 411
 412 static const struct reg_value ov5645_setting_1080p[] = {
 413         { 0x3612, 0xab },
 414         { 0x3614, 0x50 },
 415         { 0x3618, 0x04 },
 416         { 0x3034, 0x18 },
 417         { 0x3035, 0x11 },
 418         { 0x3036, 0x54 },
 419         { 0x3600, 0x08 },
 420         { 0x3601, 0x33 },
 421         { 0x3708, 0x63 },
 422         { 0x370c, 0xc0 },
 423         { 0x3800, 0x01 },
 424         { 0x3801, 0x50 },
 425         { 0x3802, 0x01 },
 426         { 0x3803, 0xb2 },
 427         { 0x3804, 0x08 },
 428         { 0x3805, 0xef },
 429         { 0x3806, 0x05 },
 430         { 0x3807, 0xf1 },
 431         { 0x3808, 0x07 },
 432         { 0x3809, 0x80 },
 433         { 0x380a, 0x04 },
 434         { 0x380b, 0x38 },
 435         { 0x380c, 0x09 },
 436         { 0x380d, 0xc4 },
 437         { 0x380e, 0x04 },
 438         { 0x380f, 0x60 },
 439         { 0x3813, 0x04 },
 440         { 0x3814, 0x11 },
 441         { 0x3815, 0x11 },
 442         { 0x3820, 0x47 },
 443         { 0x4514, 0x88 },
 444         { 0x3a02, 0x04 },
 445         { 0x3a03, 0x60 },
 446         { 0x3a08, 0x01 },
 447         { 0x3a09, 0x50 },
 448         { 0x3a0a, 0x01 },
 449         { 0x3a0b, 0x18 },
 450         { 0x3a0e, 0x03 },
 451         { 0x3a0d, 0x04 },
 452         { 0x3a14, 0x04 },
 453         { 0x3a15, 0x60 },
 454         { 0x3a18, 0x00 },
 455         { 0x4004, 0x06 },
 456         { 0x4005, 0x18 },
 457         { 0x4300, 0x32 },
 458         { 0x4202, 0x00 },
 459         { 0x4837, 0x0b }
 460 };
 461
 462 static const struct reg_value ov5645_setting_full[] = {
 463         { 0x3612, 0xab },
 464         { 0x3614, 0x50 },
 465         { 0x3618, 0x04 },
 466         { 0x3034, 0x18 },
 467         { 0x3035, 0x11 },
 468         { 0x3036, 0x54 },
 469         { 0x3600, 0x08 },
 470         { 0x3601, 0x33 },
 471         { 0x3708, 0x63 },
 472         { 0x370c, 0xc0 },
 473         { 0x3800, 0x00 },
 474         { 0x3801, 0x00 },
 475         { 0x3802, 0x00 },
 476         { 0x3803, 0x00 },
 477         { 0x3804, 0x0a },
 478         { 0x3805, 0x3f },
 479         { 0x3806, 0x07 },
 480         { 0x3807, 0x9f },
 481         { 0x3808, 0x0a },
 482         { 0x3809, 0x20 },
 483         { 0x380a, 0x07 },
 484         { 0x380b, 0x98 },
 485         { 0x380c, 0x0b },
 486         { 0x380d, 0x1c },
 487         { 0x380e, 0x07 },
 488         { 0x380f, 0xb0 },
 489         { 0x3813, 0x06 },
 490         { 0x3814, 0x11 },
 491         { 0x3815, 0x11 },
 492         { 0x3820, 0x47 },
 493         { 0x4514, 0x88 },
 494         { 0x3a02, 0x07 },
 495         { 0x3a03, 0xb0 },
 496         { 0x3a08, 0x01 },
 497         { 0x3a09, 0x27 },
 498         { 0x3a0a, 0x00 },
 499         { 0x3a0b, 0xf6 },
 500         { 0x3a0e, 0x06 },
 501         { 0x3a0d, 0x08 },
 502         { 0x3a14, 0x07 },
 503         { 0x3a15, 0xb0 },
 504         { 0x3a18, 0x01 },
 505         { 0x4004, 0x06 },
 506         { 0x4005, 0x18 },
 507         { 0x4300, 0x32 },
 508         { 0x4837, 0x0b },
 509         { 0x4202, 0x00 }
 510 };
 511
 512 static const s64 link_freq[] = {
 513         224000000,
 514         336000000
 515 };
 516
 517 static const struct ov5645_mode_info ov5645_mode_info_data[] = {
 518         {
 519                 .width = 1280,
 520                 .height = 960,
 521                 .data = ov5645_setting_sxga,
 522                 .data_size = ARRAY_SIZE(ov5645_setting_sxga),
 523                 .pixel_clock = 112000000,
 524                 .link_freq = 0 /* an index in link_freq[] */
 525         },
 526         {
 527                 .width = 1920,
 528                 .height = 1080,
 529                 .data = ov5645_setting_1080p,
 530                 .data_size = ARRAY_SIZE(ov5645_setting_1080p),
 531                 .pixel_clock = 168000000,
 532                 .link_freq = 1 /* an index in link_freq[] */
 533         },
 534         {
 535                 .width = 2592,
 536                 .height = 1944,
 537                 .data = ov5645_setting_full,
 538                 .data_size = ARRAY_SIZE(ov5645_setting_full),
 539                 .pixel_clock = 168000000,
 540                 .link_freq = 1 /* an index in link_freq[] */
 541         },
 542 };
 543
 544 static int ov5645_regulators_enable(struct ov5645 *ov5645)
 545 {
 546         int ret;
 547
 548         ret = regulator_enable(ov5645->io_regulator);
 549         if (ret < 0) {
 550                 dev_err(ov5645->dev, "set io voltage failed\n");
 551                 return ret;
 552         }
 553
 554         ret = regulator_enable(ov5645->analog_regulator);
 555         if (ret) {
 556                 dev_err(ov5645->dev, "set analog voltage failed\n");
 557                 goto err_disable_io;
 558         }
 559
 560         ret = regulator_enable(ov5645->core_regulator);
 561         if (ret) {
 562                 dev_err(ov5645->dev, "set core voltage failed\n");
 563                 goto err_disable_analog;
 564         }
 565
 566         return 0;
 567
 568 err_disable_analog:
 569         regulator_disable(ov5645->analog_regulator);
 570 err_disable_io:
 571         regulator_disable(ov5645->io_regulator);
 572
 573         return ret;
 574 }
 575
 576 static void ov5645_regulators_disable(struct ov5645 *ov5645)
 577 {
 578         int ret;
 579
 580         ret = regulator_disable(ov5645->core_regulator);
 581         if (ret < 0)
 582                 dev_err(ov5645->dev, "core regulator disable failed\n");
 583
 584         ret = regulator_disable(ov5645->analog_regulator);
 585         if (ret < 0)
 586                 dev_err(ov5645->dev, "analog regulator disable failed\n");
 587
 588         ret = regulator_disable(ov5645->io_regulator);
 589         if (ret < 0)
 590                 dev_err(ov5645->dev, "io regulator disable failed\n");
 591 }
 592
 593 static int ov5645_write_reg(struct ov5645 *ov5645, u16 reg, u8 val)
 594 {
 595         u8 regbuf[3];
 596         int ret;
 597
 598         regbuf[0] = reg >> 8;
 599         regbuf[1] = reg & 0xff;
 600         regbuf[2] = val;
 601
 602         ret = i2c_master_send(ov5645->i2c_client, regbuf, 3);
 603         if (ret < 0) {
 604                 dev_err(ov5645->dev, "%s: write reg error %d: reg=%x, val=%x\n",
 605                         __func__, ret, reg, val);
 606                 return ret;
 607         }
 608
 609         return 0;
 610 }
 611
 612 static int ov5645_read_reg(struct ov5645 *ov5645, u16 reg, u8 *val)
 613 {
 614         u8 regbuf[2];
 615         int ret;
 616
 617         regbuf[0] = reg >> 8;
 618         regbuf[1] = reg & 0xff;
 619
 620         ret = i2c_master_send(ov5645->i2c_client, regbuf, 2);
 621         if (ret < 0) {
 622                 dev_err(ov5645->dev, "%s: write reg error %d: reg=%x\n",
 623                         __func__, ret, reg);
 624                 return ret;
 625         }
 626
 627         ret = i2c_master_recv(ov5645->i2c_client, val, 1);
 628         if (ret < 0) {
 629                 dev_err(ov5645->dev, "%s: read reg error %d: reg=%x\n",
 630                         __func__, ret, reg);
 631                 return ret;
 632         }
 633
 634         return 0;
 635 }
 636
 637 static int ov5645_set_aec_mode(struct ov5645 *ov5645, u32 mode)
 638 {
 639         u8 val = ov5645->aec_pk_manual;
 640         int ret;
 641
 642         if (mode == V4L2_EXPOSURE_AUTO)
 643                 val &= ~OV5645_AEC_MANUAL_ENABLE;
 644         else /* V4L2_EXPOSURE_MANUAL */
 645                 val |= OV5645_AEC_MANUAL_ENABLE;
 646
 647         ret = ov5645_write_reg(ov5645, OV5645_AEC_PK_MANUAL, val);
 648         if (!ret)
 649                 ov5645->aec_pk_manual = val;
 650
 651         return ret;
 652 }
 653
 654 static int ov5645_set_agc_mode(struct ov5645 *ov5645, u32 enable)
 655 {
 656         u8 val = ov5645->aec_pk_manual;
 657         int ret;
 658
 659         if (enable)
 660                 val &= ~OV5645_AGC_MANUAL_ENABLE;
 661         else
 662                 val |= OV5645_AGC_MANUAL_ENABLE;
 663
 664         ret = ov5645_write_reg(ov5645, OV5645_AEC_PK_MANUAL, val);
 665         if (!ret)
 666                 ov5645->aec_pk_manual = val;
 667
 668         return ret;
 669 }
 670
 671 static int ov5645_set_register_array(struct ov5645 *ov5645,
 672                                      const struct reg_value *settings,
 673                                      unsigned int num_settings)
 674 {
 675         unsigned int i;
 676         int ret;
 677
 678         for (i = 0; i < num_settings; ++i, ++settings) {
 679                 ret = ov5645_write_reg(ov5645, settings->reg, settings->val);
 680                 if (ret < 0)
 681                         return ret;
 682         }
 683
 684         return 0;
 685 }
 686
 687 static int ov5645_set_power_on(struct ov5645 *ov5645)
 688 {
 689         int ret;
 690
 691         ret = ov5645_regulators_enable(ov5645);
 692         if (ret < 0) {
 693                 return ret;
 694         }
 695
 696         ret = clk_prepare_enable(ov5645->xclk);
 697         if (ret < 0) {
 698                 dev_err(ov5645->dev, "clk prepare enable failed\n");
 699                 ov5645_regulators_disable(ov5645);
 700                 return ret;
 701         }
 702
 703         usleep_range(5000, 15000);
 704         gpiod_set_value_cansleep(ov5645->enable_gpio, 1);
 705
 706         usleep_range(1000, 2000);
 707         gpiod_set_value_cansleep(ov5645->rst_gpio, 0);
 708
 709         msleep(20);
 710
 711         return 0;
 712 }
 713
 714 static void ov5645_set_power_off(struct ov5645 *ov5645)
 715 {
 716         gpiod_set_value_cansleep(ov5645->rst_gpio, 1);
 717         gpiod_set_value_cansleep(ov5645->enable_gpio, 0);
 718         clk_disable_unprepare(ov5645->xclk);
 719         ov5645_regulators_disable(ov5645);
 720 }
 721
 722 static int ov5645_s_power(struct v4l2_subdev *sd, int on)
 723 {
 724         struct ov5645 *ov5645 = to_ov5645(sd);
 725         int ret = 0;
 726
 727         mutex_lock(&ov5645->power_lock);
 728
 729         /* If the power count is modified from 0 to != 0 or from != 0 to 0,
 730          * update the power state.
 731          */
 732         if (ov5645->power_count == !on) {
 733                 if (on) {
 734                         ret = ov5645_set_power_on(ov5645);
 735                         if (ret < 0)
 736                                 goto exit;
 737
 738                         ret = ov5645_set_register_array(ov5645,
 739                                         ov5645_global_init_setting,
 740                                         ARRAY_SIZE(ov5645_global_init_setting));
 741                         if (ret < 0) {
 742                                 dev_err(ov5645->dev,
 743                                         "could not set init registers\n");
 744                                 ov5645_set_power_off(ov5645);
 745                                 goto exit;
 746                         }
 747
 748                         ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
 749                                                OV5645_SYSTEM_CTRL0_STOP);
 750                         if (ret < 0) {
 751                                 ov5645_set_power_off(ov5645);
 752                                 goto exit;
 753                         }
 754                 } else {
 755                         ov5645_set_power_off(ov5645);
 756                 }
 757         }
 758
 759         /* Update the power count. */
 760         ov5645->power_count += on ? 1 : -1;
 761         WARN_ON(ov5645->power_count < 0);
 762
 763 exit:
 764         mutex_unlock(&ov5645->power_lock);
 765
 766         return ret;
 767 }
 768
 769 static int ov5645_set_saturation(struct ov5645 *ov5645, s32 value)
 770 {
 771         u32 reg_value = (value * 0x10) + 0x40;
 772         int ret;
 773
 774         ret = ov5645_write_reg(ov5645, OV5645_SDE_SAT_U, reg_value);
 775         if (ret < 0)
 776                 return ret;
 777
 778         return ov5645_write_reg(ov5645, OV5645_SDE_SAT_V, reg_value);
 779 }
 780
 781 static int ov5645_set_hflip(struct ov5645 *ov5645, s32 value)
 782 {
 783         u8 val = ov5645->timing_tc_reg21;
 784         int ret;
 785
 786         if (value == 0)
 787                 val &= ~(OV5645_SENSOR_MIRROR);
 788         else
 789                 val |= (OV5645_SENSOR_MIRROR);
 790
 791         ret = ov5645_write_reg(ov5645, OV5645_TIMING_TC_REG21, val);
 792         if (!ret)
 793                 ov5645->timing_tc_reg21 = val;
 794
 795         return ret;
 796 }
 797
 798 static int ov5645_set_vflip(struct ov5645 *ov5645, s32 value)
 799 {
 800         u8 val = ov5645->timing_tc_reg20;
 801         int ret;
 802
 803         if (value == 0)
 804                 val |= (OV5645_SENSOR_VFLIP | OV5645_ISP_VFLIP);
 805         else
 806                 val &= ~(OV5645_SENSOR_VFLIP | OV5645_ISP_VFLIP);
 807
 808         ret = ov5645_write_reg(ov5645, OV5645_TIMING_TC_REG20, val);
 809         if (!ret)
 810                 ov5645->timing_tc_reg20 = val;
 811
 812         return ret;
 813 }
 814
 815 static int ov5645_set_test_pattern(struct ov5645 *ov5645, s32 value)
 816 {
 817         u8 val = 0;
 818
 819         if (value) {
 820                 val = OV5645_SET_TEST_PATTERN(value - 1);
 821                 val |= OV5645_TEST_PATTERN_ENABLE;
 822         }
 823
 824         return ov5645_write_reg(ov5645, OV5645_PRE_ISP_TEST_SETTING_1, val);
 825 }
 826
 827 static const char * const ov5645_test_pattern_menu[] = {
 828         "Disabled",
 829         "Vertical Color Bars",
 830         "Pseudo-Random Data",
 831         "Color Square",
 832         "Black Image",
 833 };
 834
 835 static int ov5645_set_awb(struct ov5645 *ov5645, s32 enable_auto)
 836 {
 837         u8 val = 0;
 838
 839         if (!enable_auto)
 840                 val = OV5645_AWB_MANUAL_ENABLE;
 841
 842         return ov5645_write_reg(ov5645, OV5645_AWB_MANUAL_CONTROL, val);
 843 }
 844
 845 static int ov5645_s_ctrl(struct v4l2_ctrl *ctrl)
 846 {
 847         struct ov5645 *ov5645 = container_of(ctrl->handler,
 848                                              struct ov5645, ctrls);
 849         int ret;
 850
 851         mutex_lock(&ov5645->power_lock);
 852         if (!ov5645->power_count) {
 853                 mutex_unlock(&ov5645->power_lock);
 854                 return 0;
 855         }
 856
 857         switch (ctrl->id) {
 858         case V4L2_CID_SATURATION:
 859                 ret = ov5645_set_saturation(ov5645, ctrl->val);
 860                 break;
 861         case V4L2_CID_AUTO_WHITE_BALANCE:
 862                 ret = ov5645_set_awb(ov5645, ctrl->val);
 863                 break;
 864         case V4L2_CID_AUTOGAIN:
 865                 ret = ov5645_set_agc_mode(ov5645, ctrl->val);
 866                 break;
 867         case V4L2_CID_EXPOSURE_AUTO:
 868                 ret = ov5645_set_aec_mode(ov5645, ctrl->val);
 869                 break;
 870         case V4L2_CID_TEST_PATTERN:
 871                 ret = ov5645_set_test_pattern(ov5645, ctrl->val);
 872                 break;
 873         case V4L2_CID_HFLIP:
 874                 ret = ov5645_set_hflip(ov5645, ctrl->val);
 875                 break;
 876         case V4L2_CID_VFLIP:
 877                 ret = ov5645_set_vflip(ov5645, ctrl->val);
 878                 break;
 879         default:
 880                 ret = -EINVAL;
 881                 break;
 882         }
 883
 884         mutex_unlock(&ov5645->power_lock);
 885
 886         return ret;
 887 }
 888
 889 static const struct v4l2_ctrl_ops ov5645_ctrl_ops = {
 890         .s_ctrl = ov5645_s_ctrl,
 891 };
 892
 893 static int ov5645_enum_mbus_code(struct v4l2_subdev *sd,
 894                                  struct v4l2_subdev_pad_config *cfg,
 895                                  struct v4l2_subdev_mbus_code_enum *code)
 896 {
 897         if (code->index > 0)
 898                 return -EINVAL;
 899
 900         code->code = MEDIA_BUS_FMT_UYVY8_2X8;
 901
 902         return 0;
 903 }
 904
 905 static int ov5645_enum_frame_size(struct v4l2_subdev *subdev,
 906                                   struct v4l2_subdev_pad_config *cfg,
 907                                   struct v4l2_subdev_frame_size_enum *fse)
 908 {
 909         if (fse->code != MEDIA_BUS_FMT_UYVY8_2X8)
 910                 return -EINVAL;
 911
 912         if (fse->index >= ARRAY_SIZE(ov5645_mode_info_data))
 913                 return -EINVAL;
 914
 915         fse->min_width = ov5645_mode_info_data[fse->index].width;
 916         fse->max_width = ov5645_mode_info_data[fse->index].width;
 917         fse->min_height = ov5645_mode_info_data[fse->index].height;
 918         fse->max_height = ov5645_mode_info_data[fse->index].height;
 919
 920         return 0;
 921 }
 922
 923 static struct v4l2_mbus_framefmt *
 924 __ov5645_get_pad_format(struct ov5645 *ov5645,
 925                         struct v4l2_subdev_pad_config *cfg,
 926                         unsigned int pad,
 927                         enum v4l2_subdev_format_whence which)
 928 {
 929         switch (which) {
 930         case V4L2_SUBDEV_FORMAT_TRY:
 931                 return v4l2_subdev_get_try_format(&ov5645->sd, cfg, pad);
 932         case V4L2_SUBDEV_FORMAT_ACTIVE:
 933                 return &ov5645->fmt;
 934         default:
 935                 return NULL;
 936         }
 937 }
 938
 939 static int ov5645_get_format(struct v4l2_subdev *sd,
 940                              struct v4l2_subdev_pad_config *cfg,
 941                              struct v4l2_subdev_format *format)
 942 {
 943         struct ov5645 *ov5645 = to_ov5645(sd);
 944
 945         format->format = *__ov5645_get_pad_format(ov5645, cfg, format->pad,
 946                                                   format->which);
 947         return 0;
 948 }
 949
 950 static struct v4l2_rect *
 951 __ov5645_get_pad_crop(struct ov5645 *ov5645, struct v4l2_subdev_pad_config *cfg,
 952                       unsigned int pad, enum v4l2_subdev_format_whence which)
 953 {
 954         switch (which) {
 955         case V4L2_SUBDEV_FORMAT_TRY:
 956                 return v4l2_subdev_get_try_crop(&ov5645->sd, cfg, pad);
 957         case V4L2_SUBDEV_FORMAT_ACTIVE:
 958                 return &ov5645->crop;
 959         default:
 960                 return NULL;
 961         }
 962 }
 963
 964 static int ov5645_set_format(struct v4l2_subdev *sd,
 965                              struct v4l2_subdev_pad_config *cfg,
 966                              struct v4l2_subdev_format *format)
 967 {
 968         struct ov5645 *ov5645 = to_ov5645(sd);
 969         struct v4l2_mbus_framefmt *__format;
 970         struct v4l2_rect *__crop;
 971         const struct ov5645_mode_info *new_mode;
 972         int ret;
 973
 974         __crop = __ov5645_get_pad_crop(ov5645, cfg, format->pad,
 975                         format->which);
 976
 977         new_mode = v4l2_find_nearest_size(ov5645_mode_info_data,
 978                                ARRAY_SIZE(ov5645_mode_info_data),
 979                                width, height,
 980                                format->format.width, format->format.height);
 981
 982         __crop->width = new_mode->width;
 983         __crop->height = new_mode->height;
 984
 985         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
 986                 ret = v4l2_ctrl_s_ctrl_int64(ov5645->pixel_clock,
 987                                              new_mode->pixel_clock);
 988                 if (ret < 0)
 989                         return ret;
 990
 991                 ret = v4l2_ctrl_s_ctrl(ov5645->link_freq,
 992                                        new_mode->link_freq);
 993                 if (ret < 0)
 994                         return ret;
 995
 996                 ov5645->current_mode = new_mode;
 997         }
 998
 999         __format = __ov5645_get_pad_format(ov5645, cfg, format->pad,
1000                         format->which);
1001         __format->width = __crop->width;
1002         __format->height = __crop->height;
1003         __format->code = MEDIA_BUS_FMT_UYVY8_2X8;
1004         __format->field = V4L2_FIELD_NONE;
1005         __format->colorspace = V4L2_COLORSPACE_SRGB;
1006
1007         format->format = *__format;
1008
1009         return 0;
1010 }
1011
1012 static int ov5645_entity_init_cfg(struct v4l2_subdev *subdev,
1013                                   struct v4l2_subdev_pad_config *cfg)
1014 {
1015         struct v4l2_subdev_format fmt = { 0 };
1016
1017         fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
1018         fmt.format.width = 1920;
1019         fmt.format.height = 1080;
1020
1021         ov5645_set_format(subdev, cfg, &fmt);
1022
1023         return 0;
1024 }
1025
1026 static int ov5645_get_selection(struct v4l2_subdev *sd,
1027                            struct v4l2_subdev_pad_config *cfg,
1028                            struct v4l2_subdev_selection *sel)
1029 {
1030         struct ov5645 *ov5645 = to_ov5645(sd);
1031
1032         if (sel->target != V4L2_SEL_TGT_CROP)
1033                 return -EINVAL;
1034
1035         sel->r = *__ov5645_get_pad_crop(ov5645, cfg, sel->pad,
1036                                         sel->which);
1037         return 0;
1038 }
1039
1040 static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable)
1041 {
1042         struct ov5645 *ov5645 = to_ov5645(subdev);
1043         int ret;
1044
1045         if (enable) {
1046                 ret = ov5645_set_register_array(ov5645,
1047                                         ov5645->current_mode->data,
1048                                         ov5645->current_mode->data_size);
1049                 if (ret < 0) {
1050                         dev_err(ov5645->dev, "could not set mode %dx%d\n",
1051                                 ov5645->current_mode->width,
1052                                 ov5645->current_mode->height);
1053                         return ret;
1054                 }
1055                 ret = v4l2_ctrl_handler_setup(&ov5645->ctrls);
1056                 if (ret < 0) {
1057                         dev_err(ov5645->dev, "could not sync v4l2 controls\n");
1058                         return ret;
1059                 }
1060                 ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
1061                                        OV5645_SYSTEM_CTRL0_START);
1062                 if (ret < 0)
1063                         return ret;
1064         } else {
1065                 ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
1066                                        OV5645_SYSTEM_CTRL0_STOP);
1067                 if (ret < 0)
1068                         return ret;
1069         }
1070
1071         return 0;
1072 }
1073
1074 static const struct v4l2_subdev_core_ops ov5645_core_ops = {
1075         .s_power = ov5645_s_power,
1076 };
1077
1078 static const struct v4l2_subdev_video_ops ov5645_video_ops = {
1079         .s_stream = ov5645_s_stream,
1080 };
1081
1082 static const struct v4l2_subdev_pad_ops ov5645_subdev_pad_ops = {
1083         .init_cfg = ov5645_entity_init_cfg,
1084         .enum_mbus_code = ov5645_enum_mbus_code,
1085         .enum_frame_size = ov5645_enum_frame_size,
1086         .get_fmt = ov5645_get_format,
1087         .set_fmt = ov5645_set_format,
1088         .get_selection = ov5645_get_selection,
1089 };
1090
1091 static const struct v4l2_subdev_ops ov5645_subdev_ops = {
1092         .core = &ov5645_core_ops,
1093         .video = &ov5645_video_ops,
1094         .pad = &ov5645_subdev_pad_ops,
1095 };
1096
1097 static int ov5645_probe(struct i2c_client *client,
1098                         const struct i2c_device_id *id)
1099 {
1100         struct device *dev = &client->dev;
1101         struct device_node *endpoint;
1102         struct ov5645 *ov5645;
1103         u8 chip_id_high, chip_id_low;
1104         u32 xclk_freq;
1105         int ret;
1106
1107         ov5645 = devm_kzalloc(dev, sizeof(struct ov5645), GFP_KERNEL);
1108         if (!ov5645)
1109                 return -ENOMEM;
1110
1111         ov5645->i2c_client = client;
1112         ov5645->dev = dev;
1113
1114         endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
1115         if (!endpoint) {
1116                 dev_err(dev, "endpoint node not found\n");
1117                 return -EINVAL;
1118         }
1119
1120         ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(endpoint),
1121                                          &ov5645->ep);
1122
1123         of_node_put(endpoint);
1124
1125         if (ret < 0) {
1126                 dev_err(dev, "parsing endpoint node failed\n");
1127                 return ret;
1128         }
1129
1130         if (ov5645->ep.bus_type != V4L2_MBUS_CSI2_DPHY) {
1131                 dev_err(dev, "invalid bus type, must be CSI2\n");
1132                 return -EINVAL;
1133         }
1134
1135         /* get system clock (xclk) */
1136         ov5645->xclk = devm_clk_get(dev, "xclk");
1137         if (IS_ERR(ov5645->xclk)) {
1138                 dev_err(dev, "could not get xclk");
1139                 return PTR_ERR(ov5645->xclk);
1140         }
1141
1142         ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq);
1143         if (ret) {
1144                 dev_err(dev, "could not get xclk frequency\n");
1145                 return ret;
1146         }
1147
1148         /* external clock must be 24MHz, allow 1% tolerance */
1149         if (xclk_freq < 23760000 || xclk_freq > 24240000) {
1150                 dev_err(dev, "external clock frequency %u is not supported\n",
1151                         xclk_freq);
1152                 return -EINVAL;
1153         }
1154
1155         ret = clk_set_rate(ov5645->xclk, xclk_freq);
1156         if (ret) {
1157                 dev_err(dev, "could not set xclk frequency\n");
1158                 return ret;
1159         }
1160
1161         ov5645->io_regulator = devm_regulator_get(dev, "vdddo");
1162         if (IS_ERR(ov5645->io_regulator)) {
1163                 dev_err(dev, "cannot get io regulator\n");
1164                 return PTR_ERR(ov5645->io_regulator);
1165         }
1166
1167         ret = regulator_set_voltage(ov5645->io_regulator,
1168                                     OV5645_VOLTAGE_DIGITAL_IO,
1169                                     OV5645_VOLTAGE_DIGITAL_IO);
1170         if (ret < 0) {
1171                 dev_err(dev, "cannot set io voltage\n");
1172                 return ret;
1173         }
1174
1175         ov5645->core_regulator = devm_regulator_get(dev, "vddd");
1176         if (IS_ERR(ov5645->core_regulator)) {
1177                 dev_err(dev, "cannot get core regulator\n");
1178                 return PTR_ERR(ov5645->core_regulator);
1179         }
1180
1181         ret = regulator_set_voltage(ov5645->core_regulator,
1182                                     OV5645_VOLTAGE_DIGITAL_CORE,
1183                                     OV5645_VOLTAGE_DIGITAL_CORE);
1184         if (ret < 0) {
1185                 dev_err(dev, "cannot set core voltage\n");
1186                 return ret;
1187         }
1188
1189         ov5645->analog_regulator = devm_regulator_get(dev, "vdda");
1190         if (IS_ERR(ov5645->analog_regulator)) {
1191                 dev_err(dev, "cannot get analog regulator\n");
1192                 return PTR_ERR(ov5645->analog_regulator);
1193         }
1194
1195         ret = regulator_set_voltage(ov5645->analog_regulator,
1196                                     OV5645_VOLTAGE_ANALOG,
1197                                     OV5645_VOLTAGE_ANALOG);
1198         if (ret < 0) {
1199                 dev_err(dev, "cannot set analog voltage\n");
1200                 return ret;
1201         }
1202
1203         ov5645->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH);
1204         if (IS_ERR(ov5645->enable_gpio)) {
1205                 dev_err(dev, "cannot get enable gpio\n");
1206                 return PTR_ERR(ov5645->enable_gpio);
1207         }
1208
1209         ov5645->rst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
1210         if (IS_ERR(ov5645->rst_gpio)) {
1211                 dev_err(dev, "cannot get reset gpio\n");
1212                 return PTR_ERR(ov5645->rst_gpio);
1213         }
1214
1215         mutex_init(&ov5645->power_lock);
1216
1217         v4l2_ctrl_handler_init(&ov5645->ctrls, 9);
1218         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1219                           V4L2_CID_SATURATION, -4, 4, 1, 0);
1220         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1221                           V4L2_CID_HFLIP, 0, 1, 1, 0);
1222         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1223                           V4L2_CID_VFLIP, 0, 1, 1, 0);
1224         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1225                           V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
1226         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1227                           V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1228         v4l2_ctrl_new_std_menu(&ov5645->ctrls, &ov5645_ctrl_ops,
1229                                V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL,
1230                                0, V4L2_EXPOSURE_AUTO);
1231         v4l2_ctrl_new_std_menu_items(&ov5645->ctrls, &ov5645_ctrl_ops,
1232                                      V4L2_CID_TEST_PATTERN,
1233                                      ARRAY_SIZE(ov5645_test_pattern_menu) - 1,
1234                                      0, 0, ov5645_test_pattern_menu);
1235         ov5645->pixel_clock = v4l2_ctrl_new_std(&ov5645->ctrls,
1236                                                 &ov5645_ctrl_ops,
1237                                                 V4L2_CID_PIXEL_RATE,
1238                                                 1, INT_MAX, 1, 1);
1239         ov5645->link_freq = v4l2_ctrl_new_int_menu(&ov5645->ctrls,
1240                                                    &ov5645_ctrl_ops,
1241                                                    V4L2_CID_LINK_FREQ,
1242                                                    ARRAY_SIZE(link_freq) - 1,
1243                                                    0, link_freq);
1244         if (ov5645->link_freq)
1245                 ov5645->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1246
1247         ov5645->sd.ctrl_handler = &ov5645->ctrls;
1248
1249         if (ov5645->ctrls.error) {
1250                 dev_err(dev, "%s: control initialization error %d\n",
1251                        __func__, ov5645->ctrls.error);
1252                 ret = ov5645->ctrls.error;
1253                 goto free_ctrl;
1254         }
1255
1256         v4l2_i2c_subdev_init(&ov5645->sd, client, &ov5645_subdev_ops);
1257         ov5645->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1258         ov5645->pad.flags = MEDIA_PAD_FL_SOURCE;
1259         ov5645->sd.dev = &client->dev;
1260         ov5645->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1261
1262         ret = media_entity_pads_init(&ov5645->sd.entity, 1, &ov5645->pad);
1263         if (ret < 0) {
1264                 dev_err(dev, "could not register media entity\n");
1265                 goto free_ctrl;
1266         }
1267
1268         ret = ov5645_s_power(&ov5645->sd, true);
1269         if (ret < 0) {
1270                 dev_err(dev, "could not power up OV5645\n");
1271                 goto free_entity;
1272         }
1273
1274         ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_HIGH, &chip_id_high);
1275         if (ret < 0 || chip_id_high != OV5645_CHIP_ID_HIGH_BYTE) {
1276                 dev_err(dev, "could not read ID high\n");
1277                 ret = -ENODEV;
1278                 goto power_down;
1279         }
1280         ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_LOW, &chip_id_low);
1281         if (ret < 0 || chip_id_low != OV5645_CHIP_ID_LOW_BYTE) {
1282                 dev_err(dev, "could not read ID low\n");
1283                 ret = -ENODEV;
1284                 goto power_down;
1285         }
1286
1287         dev_info(dev, "OV5645 detected at address 0x%02x\n", client->addr);
1288
1289         ret = ov5645_read_reg(ov5645, OV5645_AEC_PK_MANUAL,
1290                               &ov5645->aec_pk_manual);
1291         if (ret < 0) {
1292                 dev_err(dev, "could not read AEC/AGC mode\n");
1293                 ret = -ENODEV;
1294                 goto power_down;
1295         }
1296
1297         ret = ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG20,
1298                               &ov5645->timing_tc_reg20);
1299         if (ret < 0) {
1300                 dev_err(dev, "could not read vflip value\n");
1301                 ret = -ENODEV;
1302                 goto power_down;
1303         }
1304
1305         ret = ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG21,
1306                               &ov5645->timing_tc_reg21);
1307         if (ret < 0) {
1308                 dev_err(dev, "could not read hflip value\n");
1309                 ret = -ENODEV;
1310                 goto power_down;
1311         }
1312
1313         ov5645_s_power(&ov5645->sd, false);
1314
1315         ret = v4l2_async_register_subdev(&ov5645->sd);
1316         if (ret < 0) {
1317                 dev_err(dev, "could not register v4l2 device\n");
1318                 goto free_entity;
1319         }
1320
1321         ov5645_entity_init_cfg(&ov5645->sd, NULL);
1322
1323         return 0;
1324
1325 power_down:
1326         ov5645_s_power(&ov5645->sd, false);
1327 free_entity:
1328         media_entity_cleanup(&ov5645->sd.entity);
1329 free_ctrl:
1330         v4l2_ctrl_handler_free(&ov5645->ctrls);
1331         mutex_destroy(&ov5645->power_lock);
1332
1333         return ret;
1334 }
1335
1336 static int ov5645_remove(struct i2c_client *client)
1337 {
1338         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1339         struct ov5645 *ov5645 = to_ov5645(sd);
1340
1341         v4l2_async_unregister_subdev(&ov5645->sd);
1342         media_entity_cleanup(&ov5645->sd.entity);
1343         v4l2_ctrl_handler_free(&ov5645->ctrls);
1344         mutex_destroy(&ov5645->power_lock);
1345
1346         return 0;
1347 }
1348
1349 static const struct i2c_device_id ov5645_id[] = {
1350         { "ov5645", 0 },
1351         {}
1352 };
1353 MODULE_DEVICE_TABLE(i2c, ov5645_id);
1354
1355 static const struct of_device_id ov5645_of_match[] = {
1356         { .compatible = "ovti,ov5645" },
1357         { /* sentinel */ }
1358 };
1359 MODULE_DEVICE_TABLE(of, ov5645_of_match);
1360
1361 static struct i2c_driver ov5645_i2c_driver = {
1362         .driver = {
1363                 .of_match_table = of_match_ptr(ov5645_of_match),
1364                 .name  = "ov5645",
1365         },
1366         .probe  = ov5645_probe,
1367         .remove = ov5645_remove,
1368         .id_table = ov5645_id,
1369 };
1370
1371 module_i2c_driver(ov5645_i2c_driver);
1372
1373 MODULE_DESCRIPTION("Omnivision OV5645 Camera Driver");
1374 MODULE_AUTHOR("Todor Tomov <todor.tomov@linaro.org>");
1375 MODULE_LICENSE("GPL v2");