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         222880000,
 514         334320000
 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 = 111440000,
 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 = 167160000,
 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 = 167160000,
 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
 607         return ret;
 608 }
 609
 610 static int ov5645_read_reg(struct ov5645 *ov5645, u16 reg, u8 *val)
 611 {
 612         u8 regbuf[2];
 613         int ret;
 614
 615         regbuf[0] = reg >> 8;
 616         regbuf[1] = reg & 0xff;
 617
 618         ret = i2c_master_send(ov5645->i2c_client, regbuf, 2);
 619         if (ret < 0) {
 620                 dev_err(ov5645->dev, "%s: write reg error %d: reg=%x\n",
 621                         __func__, ret, reg);
 622                 return ret;
 623         }
 624
 625         ret = i2c_master_recv(ov5645->i2c_client, val, 1);
 626         if (ret < 0) {
 627                 dev_err(ov5645->dev, "%s: read reg error %d: reg=%x\n",
 628                         __func__, ret, reg);
 629                 return ret;
 630         }
 631
 632         return 0;
 633 }
 634
 635 static int ov5645_set_aec_mode(struct ov5645 *ov5645, u32 mode)
 636 {
 637         u8 val = ov5645->aec_pk_manual;
 638         int ret;
 639
 640         if (mode == V4L2_EXPOSURE_AUTO)
 641                 val &= ~OV5645_AEC_MANUAL_ENABLE;
 642         else /* V4L2_EXPOSURE_MANUAL */
 643                 val |= OV5645_AEC_MANUAL_ENABLE;
 644
 645         ret = ov5645_write_reg(ov5645, OV5645_AEC_PK_MANUAL, val);
 646         if (!ret)
 647                 ov5645->aec_pk_manual = val;
 648
 649         return ret;
 650 }
 651
 652 static int ov5645_set_agc_mode(struct ov5645 *ov5645, u32 enable)
 653 {
 654         u8 val = ov5645->aec_pk_manual;
 655         int ret;
 656
 657         if (enable)
 658                 val &= ~OV5645_AGC_MANUAL_ENABLE;
 659         else
 660                 val |= OV5645_AGC_MANUAL_ENABLE;
 661
 662         ret = ov5645_write_reg(ov5645, OV5645_AEC_PK_MANUAL, val);
 663         if (!ret)
 664                 ov5645->aec_pk_manual = val;
 665
 666         return ret;
 667 }
 668
 669 static int ov5645_set_register_array(struct ov5645 *ov5645,
 670                                      const struct reg_value *settings,
 671                                      unsigned int num_settings)
 672 {
 673         unsigned int i;
 674         int ret;
 675
 676         for (i = 0; i < num_settings; ++i, ++settings) {
 677                 ret = ov5645_write_reg(ov5645, settings->reg, settings->val);
 678                 if (ret < 0)
 679                         return ret;
 680         }
 681
 682         return 0;
 683 }
 684
 685 static int ov5645_set_power_on(struct ov5645 *ov5645)
 686 {
 687         int ret;
 688
 689         ret = ov5645_regulators_enable(ov5645);
 690         if (ret < 0) {
 691                 return ret;
 692         }
 693
 694         ret = clk_prepare_enable(ov5645->xclk);
 695         if (ret < 0) {
 696                 dev_err(ov5645->dev, "clk prepare enable failed\n");
 697                 ov5645_regulators_disable(ov5645);
 698                 return ret;
 699         }
 700
 701         usleep_range(5000, 15000);
 702         gpiod_set_value_cansleep(ov5645->enable_gpio, 1);
 703
 704         usleep_range(1000, 2000);
 705         gpiod_set_value_cansleep(ov5645->rst_gpio, 0);
 706
 707         msleep(20);
 708
 709         return 0;
 710 }
 711
 712 static void ov5645_set_power_off(struct ov5645 *ov5645)
 713 {
 714         gpiod_set_value_cansleep(ov5645->rst_gpio, 1);
 715         gpiod_set_value_cansleep(ov5645->enable_gpio, 0);
 716         clk_disable_unprepare(ov5645->xclk);
 717         ov5645_regulators_disable(ov5645);
 718 }
 719
 720 static int ov5645_s_power(struct v4l2_subdev *sd, int on)
 721 {
 722         struct ov5645 *ov5645 = to_ov5645(sd);
 723         int ret = 0;
 724
 725         mutex_lock(&ov5645->power_lock);
 726
 727         /* If the power count is modified from 0 to != 0 or from != 0 to 0,
 728          * update the power state.
 729          */
 730         if (ov5645->power_count == !on) {
 731                 if (on) {
 732                         ret = ov5645_set_power_on(ov5645);
 733                         if (ret < 0)
 734                                 goto exit;
 735
 736                         ret = ov5645_set_register_array(ov5645,
 737                                         ov5645_global_init_setting,
 738                                         ARRAY_SIZE(ov5645_global_init_setting));
 739                         if (ret < 0) {
 740                                 dev_err(ov5645->dev,
 741                                         "could not set init registers\n");
 742                                 ov5645_set_power_off(ov5645);
 743                                 goto exit;
 744                         }
 745
 746                         ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
 747                                                OV5645_SYSTEM_CTRL0_STOP);
 748                         if (ret < 0) {
 749                                 ov5645_set_power_off(ov5645);
 750                                 goto exit;
 751                         }
 752                 } else {
 753                         ov5645_set_power_off(ov5645);
 754                 }
 755         }
 756
 757         /* Update the power count. */
 758         ov5645->power_count += on ? 1 : -1;
 759         WARN_ON(ov5645->power_count < 0);
 760
 761 exit:
 762         mutex_unlock(&ov5645->power_lock);
 763
 764         return ret;
 765 }
 766
 767 static int ov5645_set_saturation(struct ov5645 *ov5645, s32 value)
 768 {
 769         u32 reg_value = (value * 0x10) + 0x40;
 770         int ret;
 771
 772         ret = ov5645_write_reg(ov5645, OV5645_SDE_SAT_U, reg_value);
 773         if (ret < 0)
 774                 return ret;
 775
 776         return ov5645_write_reg(ov5645, OV5645_SDE_SAT_V, reg_value);
 777 }
 778
 779 static int ov5645_set_hflip(struct ov5645 *ov5645, s32 value)
 780 {
 781         u8 val = ov5645->timing_tc_reg21;
 782         int ret;
 783
 784         if (value == 0)
 785                 val &= ~(OV5645_SENSOR_MIRROR);
 786         else
 787                 val |= (OV5645_SENSOR_MIRROR);
 788
 789         ret = ov5645_write_reg(ov5645, OV5645_TIMING_TC_REG21, val);
 790         if (!ret)
 791                 ov5645->timing_tc_reg21 = val;
 792
 793         return ret;
 794 }
 795
 796 static int ov5645_set_vflip(struct ov5645 *ov5645, s32 value)
 797 {
 798         u8 val = ov5645->timing_tc_reg20;
 799         int ret;
 800
 801         if (value == 0)
 802                 val |= (OV5645_SENSOR_VFLIP | OV5645_ISP_VFLIP);
 803         else
 804                 val &= ~(OV5645_SENSOR_VFLIP | OV5645_ISP_VFLIP);
 805
 806         ret = ov5645_write_reg(ov5645, OV5645_TIMING_TC_REG20, val);
 807         if (!ret)
 808                 ov5645->timing_tc_reg20 = val;
 809
 810         return ret;
 811 }
 812
 813 static int ov5645_set_test_pattern(struct ov5645 *ov5645, s32 value)
 814 {
 815         u8 val = 0;
 816
 817         if (value) {
 818                 val = OV5645_SET_TEST_PATTERN(value - 1);
 819                 val |= OV5645_TEST_PATTERN_ENABLE;
 820         }
 821
 822         return ov5645_write_reg(ov5645, OV5645_PRE_ISP_TEST_SETTING_1, val);
 823 }
 824
 825 static const char * const ov5645_test_pattern_menu[] = {
 826         "Disabled",
 827         "Vertical Color Bars",
 828         "Pseudo-Random Data",
 829         "Color Square",
 830         "Black Image",
 831 };
 832
 833 static int ov5645_set_awb(struct ov5645 *ov5645, s32 enable_auto)
 834 {
 835         u8 val = 0;
 836
 837         if (!enable_auto)
 838                 val = OV5645_AWB_MANUAL_ENABLE;
 839
 840         return ov5645_write_reg(ov5645, OV5645_AWB_MANUAL_CONTROL, val);
 841 }
 842
 843 static int ov5645_s_ctrl(struct v4l2_ctrl *ctrl)
 844 {
 845         struct ov5645 *ov5645 = container_of(ctrl->handler,
 846                                              struct ov5645, ctrls);
 847         int ret;
 848
 849         mutex_lock(&ov5645->power_lock);
 850         if (!ov5645->power_count) {
 851                 mutex_unlock(&ov5645->power_lock);
 852                 return 0;
 853         }
 854
 855         switch (ctrl->id) {
 856         case V4L2_CID_SATURATION:
 857                 ret = ov5645_set_saturation(ov5645, ctrl->val);
 858                 break;
 859         case V4L2_CID_AUTO_WHITE_BALANCE:
 860                 ret = ov5645_set_awb(ov5645, ctrl->val);
 861                 break;
 862         case V4L2_CID_AUTOGAIN:
 863                 ret = ov5645_set_agc_mode(ov5645, ctrl->val);
 864                 break;
 865         case V4L2_CID_EXPOSURE_AUTO:
 866                 ret = ov5645_set_aec_mode(ov5645, ctrl->val);
 867                 break;
 868         case V4L2_CID_TEST_PATTERN:
 869                 ret = ov5645_set_test_pattern(ov5645, ctrl->val);
 870                 break;
 871         case V4L2_CID_HFLIP:
 872                 ret = ov5645_set_hflip(ov5645, ctrl->val);
 873                 break;
 874         case V4L2_CID_VFLIP:
 875                 ret = ov5645_set_vflip(ov5645, ctrl->val);
 876                 break;
 877         default:
 878                 ret = -EINVAL;
 879                 break;
 880         }
 881
 882         mutex_unlock(&ov5645->power_lock);
 883
 884         return ret;
 885 }
 886
 887 static struct v4l2_ctrl_ops ov5645_ctrl_ops = {
 888         .s_ctrl = ov5645_s_ctrl,
 889 };
 890
 891 static int ov5645_enum_mbus_code(struct v4l2_subdev *sd,
 892                                  struct v4l2_subdev_pad_config *cfg,
 893                                  struct v4l2_subdev_mbus_code_enum *code)
 894 {
 895         if (code->index > 0)
 896                 return -EINVAL;
 897
 898         code->code = MEDIA_BUS_FMT_UYVY8_2X8;
 899
 900         return 0;
 901 }
 902
 903 static int ov5645_enum_frame_size(struct v4l2_subdev *subdev,
 904                                   struct v4l2_subdev_pad_config *cfg,
 905                                   struct v4l2_subdev_frame_size_enum *fse)
 906 {
 907         if (fse->code != MEDIA_BUS_FMT_UYVY8_2X8)
 908                 return -EINVAL;
 909
 910         if (fse->index >= ARRAY_SIZE(ov5645_mode_info_data))
 911                 return -EINVAL;
 912
 913         fse->min_width = ov5645_mode_info_data[fse->index].width;
 914         fse->max_width = ov5645_mode_info_data[fse->index].width;
 915         fse->min_height = ov5645_mode_info_data[fse->index].height;
 916         fse->max_height = ov5645_mode_info_data[fse->index].height;
 917
 918         return 0;
 919 }
 920
 921 static struct v4l2_mbus_framefmt *
 922 __ov5645_get_pad_format(struct ov5645 *ov5645,
 923                         struct v4l2_subdev_pad_config *cfg,
 924                         unsigned int pad,
 925                         enum v4l2_subdev_format_whence which)
 926 {
 927         switch (which) {
 928         case V4L2_SUBDEV_FORMAT_TRY:
 929                 return v4l2_subdev_get_try_format(&ov5645->sd, cfg, pad);
 930         case V4L2_SUBDEV_FORMAT_ACTIVE:
 931                 return &ov5645->fmt;
 932         default:
 933                 return NULL;
 934         }
 935 }
 936
 937 static int ov5645_get_format(struct v4l2_subdev *sd,
 938                              struct v4l2_subdev_pad_config *cfg,
 939                              struct v4l2_subdev_format *format)
 940 {
 941         struct ov5645 *ov5645 = to_ov5645(sd);
 942
 943         format->format = *__ov5645_get_pad_format(ov5645, cfg, format->pad,
 944                                                   format->which);
 945         return 0;
 946 }
 947
 948 static struct v4l2_rect *
 949 __ov5645_get_pad_crop(struct ov5645 *ov5645, struct v4l2_subdev_pad_config *cfg,
 950                       unsigned int pad, enum v4l2_subdev_format_whence which)
 951 {
 952         switch (which) {
 953         case V4L2_SUBDEV_FORMAT_TRY:
 954                 return v4l2_subdev_get_try_crop(&ov5645->sd, cfg, pad);
 955         case V4L2_SUBDEV_FORMAT_ACTIVE:
 956                 return &ov5645->crop;
 957         default:
 958                 return NULL;
 959         }
 960 }
 961
 962 static const struct ov5645_mode_info *
 963 ov5645_find_nearest_mode(unsigned int width, unsigned int height)
 964 {
 965         int i;
 966
 967         for (i = ARRAY_SIZE(ov5645_mode_info_data) - 1; i >= 0; i--) {
 968                 if (ov5645_mode_info_data[i].width <= width &&
 969                     ov5645_mode_info_data[i].height <= height)
 970                         break;
 971         }
 972
 973         if (i < 0)
 974                 i = 0;
 975
 976         return &ov5645_mode_info_data[i];
 977 }
 978
 979 static int ov5645_set_format(struct v4l2_subdev *sd,
 980                              struct v4l2_subdev_pad_config *cfg,
 981                              struct v4l2_subdev_format *format)
 982 {
 983         struct ov5645 *ov5645 = to_ov5645(sd);
 984         struct v4l2_mbus_framefmt *__format;
 985         struct v4l2_rect *__crop;
 986         const struct ov5645_mode_info *new_mode;
 987         int ret;
 988
 989         __crop = __ov5645_get_pad_crop(ov5645, cfg, format->pad,
 990                         format->which);
 991
 992         new_mode = ov5645_find_nearest_mode(format->format.width,
 993                                             format->format.height);
 994         __crop->width = new_mode->width;
 995         __crop->height = new_mode->height;
 996
 997         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
 998                 ret = v4l2_ctrl_s_ctrl_int64(ov5645->pixel_clock,
 999                                              new_mode->pixel_clock);
1000                 if (ret < 0)
1001                         return ret;
1002
1003                 ret = v4l2_ctrl_s_ctrl(ov5645->link_freq,
1004                                        new_mode->link_freq);
1005                 if (ret < 0)
1006                         return ret;
1007
1008                 ov5645->current_mode = new_mode;
1009         }
1010
1011         __format = __ov5645_get_pad_format(ov5645, cfg, format->pad,
1012                         format->which);
1013         __format->width = __crop->width;
1014         __format->height = __crop->height;
1015         __format->code = MEDIA_BUS_FMT_UYVY8_2X8;
1016         __format->field = V4L2_FIELD_NONE;
1017         __format->colorspace = V4L2_COLORSPACE_SRGB;
1018
1019         format->format = *__format;
1020
1021         return 0;
1022 }
1023
1024 static int ov5645_entity_init_cfg(struct v4l2_subdev *subdev,
1025                                   struct v4l2_subdev_pad_config *cfg)
1026 {
1027         struct v4l2_subdev_format fmt = { 0 };
1028
1029         fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
1030         fmt.format.width = 1920;
1031         fmt.format.height = 1080;
1032
1033         ov5645_set_format(subdev, cfg, &fmt);
1034
1035         return 0;
1036 }
1037
1038 static int ov5645_get_selection(struct v4l2_subdev *sd,
1039                            struct v4l2_subdev_pad_config *cfg,
1040                            struct v4l2_subdev_selection *sel)
1041 {
1042         struct ov5645 *ov5645 = to_ov5645(sd);
1043
1044         if (sel->target != V4L2_SEL_TGT_CROP)
1045                 return -EINVAL;
1046
1047         sel->r = *__ov5645_get_pad_crop(ov5645, cfg, sel->pad,
1048                                         sel->which);
1049         return 0;
1050 }
1051
1052 static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable)
1053 {
1054         struct ov5645 *ov5645 = to_ov5645(subdev);
1055         int ret;
1056
1057         if (enable) {
1058                 ret = ov5645_set_register_array(ov5645,
1059                                         ov5645->current_mode->data,
1060                                         ov5645->current_mode->data_size);
1061                 if (ret < 0) {
1062                         dev_err(ov5645->dev, "could not set mode %dx%d\n",
1063                                 ov5645->current_mode->width,
1064                                 ov5645->current_mode->height);
1065                         return ret;
1066                 }
1067                 ret = v4l2_ctrl_handler_setup(&ov5645->ctrls);
1068                 if (ret < 0) {
1069                         dev_err(ov5645->dev, "could not sync v4l2 controls\n");
1070                         return ret;
1071                 }
1072                 ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
1073                                        OV5645_SYSTEM_CTRL0_START);
1074                 if (ret < 0)
1075                         return ret;
1076         } else {
1077                 ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
1078                                        OV5645_SYSTEM_CTRL0_STOP);
1079                 if (ret < 0)
1080                         return ret;
1081         }
1082
1083         return 0;
1084 }
1085
1086 static const struct v4l2_subdev_core_ops ov5645_core_ops = {
1087         .s_power = ov5645_s_power,
1088 };
1089
1090 static const struct v4l2_subdev_video_ops ov5645_video_ops = {
1091         .s_stream = ov5645_s_stream,
1092 };
1093
1094 static const struct v4l2_subdev_pad_ops ov5645_subdev_pad_ops = {
1095         .init_cfg = ov5645_entity_init_cfg,
1096         .enum_mbus_code = ov5645_enum_mbus_code,
1097         .enum_frame_size = ov5645_enum_frame_size,
1098         .get_fmt = ov5645_get_format,
1099         .set_fmt = ov5645_set_format,
1100         .get_selection = ov5645_get_selection,
1101 };
1102
1103 static const struct v4l2_subdev_ops ov5645_subdev_ops = {
1104         .core = &ov5645_core_ops,
1105         .video = &ov5645_video_ops,
1106         .pad = &ov5645_subdev_pad_ops,
1107 };
1108
1109 static int ov5645_probe(struct i2c_client *client,
1110                         const struct i2c_device_id *id)
1111 {
1112         struct device *dev = &client->dev;
1113         struct device_node *endpoint;
1114         struct ov5645 *ov5645;
1115         u8 chip_id_high, chip_id_low;
1116         u32 xclk_freq;
1117         int ret;
1118
1119         ov5645 = devm_kzalloc(dev, sizeof(struct ov5645), GFP_KERNEL);
1120         if (!ov5645)
1121                 return -ENOMEM;
1122
1123         ov5645->i2c_client = client;
1124         ov5645->dev = dev;
1125
1126         endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
1127         if (!endpoint) {
1128                 dev_err(dev, "endpoint node not found\n");
1129                 return -EINVAL;
1130         }
1131
1132         ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(endpoint),
1133                                          &ov5645->ep);
1134         if (ret < 0) {
1135                 dev_err(dev, "parsing endpoint node failed\n");
1136                 return ret;
1137         }
1138
1139         of_node_put(endpoint);
1140
1141         if (ov5645->ep.bus_type != V4L2_MBUS_CSI2) {
1142                 dev_err(dev, "invalid bus type, must be CSI2\n");
1143                 return -EINVAL;
1144         }
1145
1146         /* get system clock (xclk) */
1147         ov5645->xclk = devm_clk_get(dev, "xclk");
1148         if (IS_ERR(ov5645->xclk)) {
1149                 dev_err(dev, "could not get xclk");
1150                 return PTR_ERR(ov5645->xclk);
1151         }
1152
1153         ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq);
1154         if (ret) {
1155                 dev_err(dev, "could not get xclk frequency\n");
1156                 return ret;
1157         }
1158
1159         if (xclk_freq != 23880000) {
1160                 dev_err(dev, "external clock frequency %u is not supported\n",
1161                         xclk_freq);
1162                 return -EINVAL;
1163         }
1164
1165         ret = clk_set_rate(ov5645->xclk, xclk_freq);
1166         if (ret) {
1167                 dev_err(dev, "could not set xclk frequency\n");
1168                 return ret;
1169         }
1170
1171         ov5645->io_regulator = devm_regulator_get(dev, "vdddo");
1172         if (IS_ERR(ov5645->io_regulator)) {
1173                 dev_err(dev, "cannot get io regulator\n");
1174                 return PTR_ERR(ov5645->io_regulator);
1175         }
1176
1177         ret = regulator_set_voltage(ov5645->io_regulator,
1178                                     OV5645_VOLTAGE_DIGITAL_IO,
1179                                     OV5645_VOLTAGE_DIGITAL_IO);
1180         if (ret < 0) {
1181                 dev_err(dev, "cannot set io voltage\n");
1182                 return ret;
1183         }
1184
1185         ov5645->core_regulator = devm_regulator_get(dev, "vddd");
1186         if (IS_ERR(ov5645->core_regulator)) {
1187                 dev_err(dev, "cannot get core regulator\n");
1188                 return PTR_ERR(ov5645->core_regulator);
1189         }
1190
1191         ret = regulator_set_voltage(ov5645->core_regulator,
1192                                     OV5645_VOLTAGE_DIGITAL_CORE,
1193                                     OV5645_VOLTAGE_DIGITAL_CORE);
1194         if (ret < 0) {
1195                 dev_err(dev, "cannot set core voltage\n");
1196                 return ret;
1197         }
1198
1199         ov5645->analog_regulator = devm_regulator_get(dev, "vdda");
1200         if (IS_ERR(ov5645->analog_regulator)) {
1201                 dev_err(dev, "cannot get analog regulator\n");
1202                 return PTR_ERR(ov5645->analog_regulator);
1203         }
1204
1205         ret = regulator_set_voltage(ov5645->analog_regulator,
1206                                     OV5645_VOLTAGE_ANALOG,
1207                                     OV5645_VOLTAGE_ANALOG);
1208         if (ret < 0) {
1209                 dev_err(dev, "cannot set analog voltage\n");
1210                 return ret;
1211         }
1212
1213         ov5645->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH);
1214         if (IS_ERR(ov5645->enable_gpio)) {
1215                 dev_err(dev, "cannot get enable gpio\n");
1216                 return PTR_ERR(ov5645->enable_gpio);
1217         }
1218
1219         ov5645->rst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
1220         if (IS_ERR(ov5645->rst_gpio)) {
1221                 dev_err(dev, "cannot get reset gpio\n");
1222                 return PTR_ERR(ov5645->rst_gpio);
1223         }
1224
1225         mutex_init(&ov5645->power_lock);
1226
1227         v4l2_ctrl_handler_init(&ov5645->ctrls, 9);
1228         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1229                           V4L2_CID_SATURATION, -4, 4, 1, 0);
1230         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1231                           V4L2_CID_HFLIP, 0, 1, 1, 0);
1232         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1233                           V4L2_CID_VFLIP, 0, 1, 1, 0);
1234         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1235                           V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
1236         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1237                           V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1238         v4l2_ctrl_new_std_menu(&ov5645->ctrls, &ov5645_ctrl_ops,
1239                                V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL,
1240                                0, V4L2_EXPOSURE_AUTO);
1241         v4l2_ctrl_new_std_menu_items(&ov5645->ctrls, &ov5645_ctrl_ops,
1242                                      V4L2_CID_TEST_PATTERN,
1243                                      ARRAY_SIZE(ov5645_test_pattern_menu) - 1,
1244                                      0, 0, ov5645_test_pattern_menu);
1245         ov5645->pixel_clock = v4l2_ctrl_new_std(&ov5645->ctrls,
1246                                                 &ov5645_ctrl_ops,
1247                                                 V4L2_CID_PIXEL_RATE,
1248                                                 1, INT_MAX, 1, 1);
1249         ov5645->link_freq = v4l2_ctrl_new_int_menu(&ov5645->ctrls,
1250                                                    &ov5645_ctrl_ops,
1251                                                    V4L2_CID_LINK_FREQ,
1252                                                    ARRAY_SIZE(link_freq) - 1,
1253                                                    0, link_freq);
1254         if (ov5645->link_freq)
1255                 ov5645->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1256
1257         ov5645->sd.ctrl_handler = &ov5645->ctrls;
1258
1259         if (ov5645->ctrls.error) {
1260                 dev_err(dev, "%s: control initialization error %d\n",
1261                        __func__, ov5645->ctrls.error);
1262                 ret = ov5645->ctrls.error;
1263                 goto free_ctrl;
1264         }
1265
1266         v4l2_i2c_subdev_init(&ov5645->sd, client, &ov5645_subdev_ops);
1267         ov5645->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1268         ov5645->pad.flags = MEDIA_PAD_FL_SOURCE;
1269         ov5645->sd.dev = &client->dev;
1270         ov5645->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1271
1272         ret = media_entity_pads_init(&ov5645->sd.entity, 1, &ov5645->pad);
1273         if (ret < 0) {
1274                 dev_err(dev, "could not register media entity\n");
1275                 goto free_ctrl;
1276         }
1277
1278         ret = ov5645_s_power(&ov5645->sd, true);
1279         if (ret < 0) {
1280                 dev_err(dev, "could not power up OV5645\n");
1281                 goto free_entity;
1282         }
1283
1284         ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_HIGH, &chip_id_high);
1285         if (ret < 0 || chip_id_high != OV5645_CHIP_ID_HIGH_BYTE) {
1286                 dev_err(dev, "could not read ID high\n");
1287                 ret = -ENODEV;
1288                 goto power_down;
1289         }
1290         ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_LOW, &chip_id_low);
1291         if (ret < 0 || chip_id_low != OV5645_CHIP_ID_LOW_BYTE) {
1292                 dev_err(dev, "could not read ID low\n");
1293                 ret = -ENODEV;
1294                 goto power_down;
1295         }
1296
1297         dev_info(dev, "OV5645 detected at address 0x%02x\n", client->addr);
1298
1299         ret = ov5645_read_reg(ov5645, OV5645_AEC_PK_MANUAL,
1300                               &ov5645->aec_pk_manual);
1301         if (ret < 0) {
1302                 dev_err(dev, "could not read AEC/AGC mode\n");
1303                 ret = -ENODEV;
1304                 goto power_down;
1305         }
1306
1307         ret = ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG20,
1308                               &ov5645->timing_tc_reg20);
1309         if (ret < 0) {
1310                 dev_err(dev, "could not read vflip value\n");
1311                 ret = -ENODEV;
1312                 goto power_down;
1313         }
1314
1315         ret = ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG21,
1316                               &ov5645->timing_tc_reg21);
1317         if (ret < 0) {
1318                 dev_err(dev, "could not read hflip value\n");
1319                 ret = -ENODEV;
1320                 goto power_down;
1321         }
1322
1323         ov5645_s_power(&ov5645->sd, false);
1324
1325         ret = v4l2_async_register_subdev(&ov5645->sd);
1326         if (ret < 0) {
1327                 dev_err(dev, "could not register v4l2 device\n");
1328                 goto free_entity;
1329         }
1330
1331         ov5645_entity_init_cfg(&ov5645->sd, NULL);
1332
1333         return 0;
1334
1335 power_down:
1336         ov5645_s_power(&ov5645->sd, false);
1337 free_entity:
1338         media_entity_cleanup(&ov5645->sd.entity);
1339 free_ctrl:
1340         v4l2_ctrl_handler_free(&ov5645->ctrls);
1341         mutex_destroy(&ov5645->power_lock);
1342
1343         return ret;
1344 }
1345
1346 static int ov5645_remove(struct i2c_client *client)
1347 {
1348         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1349         struct ov5645 *ov5645 = to_ov5645(sd);
1350
1351         v4l2_async_unregister_subdev(&ov5645->sd);
1352         media_entity_cleanup(&ov5645->sd.entity);
1353         v4l2_ctrl_handler_free(&ov5645->ctrls);
1354         mutex_destroy(&ov5645->power_lock);
1355
1356         return 0;
1357 }
1358
1359 static const struct i2c_device_id ov5645_id[] = {
1360         { "ov5645", 0 },
1361         {}
1362 };
1363 MODULE_DEVICE_TABLE(i2c, ov5645_id);
1364
1365 static const struct of_device_id ov5645_of_match[] = {
1366         { .compatible = "ovti,ov5645" },
1367         { /* sentinel */ }
1368 };
1369 MODULE_DEVICE_TABLE(of, ov5645_of_match);
1370
1371 static struct i2c_driver ov5645_i2c_driver = {
1372         .driver = {
1373                 .of_match_table = of_match_ptr(ov5645_of_match),
1374                 .name  = "ov5645",
1375         },
1376         .probe  = ov5645_probe,
1377         .remove = ov5645_remove,
1378         .id_table = ov5645_id,
1379 };
1380
1381 module_i2c_driver(ov5645_i2c_driver);
1382
1383 MODULE_DESCRIPTION("Omnivision OV5645 Camera Driver");
1384 MODULE_AUTHOR("Todor Tomov <todor.tomov@linaro.org>");
1385 MODULE_LICENSE("GPL v2");