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-of.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 };
  84
  85 struct ov5645 {
  86         struct i2c_client *i2c_client;
  87         struct device *dev;
  88         struct v4l2_subdev sd;
  89         struct media_pad pad;
  90         struct v4l2_of_endpoint ep;
  91         struct v4l2_mbus_framefmt fmt;
  92         struct v4l2_rect crop;
  93         struct clk *xclk;
  94
  95         struct regulator *io_regulator;
  96         struct regulator *core_regulator;
  97         struct regulator *analog_regulator;
  98
  99         const struct ov5645_mode_info *current_mode;
 100
 101         struct v4l2_ctrl_handler ctrls;
 102
 103         /* Cached register values */
 104         u8 aec_pk_manual;
 105         u8 timing_tc_reg20;
 106         u8 timing_tc_reg21;
 107
 108         struct mutex power_lock; /* lock to protect power state */
 109         int power_count;
 110
 111         struct gpio_desc *enable_gpio;
 112         struct gpio_desc *rst_gpio;
 113 };
 114
 115 static inline struct ov5645 *to_ov5645(struct v4l2_subdev *sd)
 116 {
 117         return container_of(sd, struct ov5645, sd);
 118 }
 119
 120 static const struct reg_value ov5645_global_init_setting[] = {
 121         { 0x3103, 0x11 },
 122         { 0x3008, 0x82 },
 123         { 0x3008, 0x42 },
 124         { 0x3103, 0x03 },
 125         { 0x3503, 0x07 },
 126         { 0x3002, 0x1c },
 127         { 0x3006, 0xc3 },
 128         { 0x300e, 0x45 },
 129         { 0x3017, 0x00 },
 130         { 0x3018, 0x00 },
 131         { 0x302e, 0x0b },
 132         { 0x3037, 0x13 },
 133         { 0x3108, 0x01 },
 134         { 0x3611, 0x06 },
 135         { 0x3500, 0x00 },
 136         { 0x3501, 0x01 },
 137         { 0x3502, 0x00 },
 138         { 0x350a, 0x00 },
 139         { 0x350b, 0x3f },
 140         { 0x3620, 0x33 },
 141         { 0x3621, 0xe0 },
 142         { 0x3622, 0x01 },
 143         { 0x3630, 0x2e },
 144         { 0x3631, 0x00 },
 145         { 0x3632, 0x32 },
 146         { 0x3633, 0x52 },
 147         { 0x3634, 0x70 },
 148         { 0x3635, 0x13 },
 149         { 0x3636, 0x03 },
 150         { 0x3703, 0x5a },
 151         { 0x3704, 0xa0 },
 152         { 0x3705, 0x1a },
 153         { 0x3709, 0x12 },
 154         { 0x370b, 0x61 },
 155         { 0x370f, 0x10 },
 156         { 0x3715, 0x78 },
 157         { 0x3717, 0x01 },
 158         { 0x371b, 0x20 },
 159         { 0x3731, 0x12 },
 160         { 0x3901, 0x0a },
 161         { 0x3905, 0x02 },
 162         { 0x3906, 0x10 },
 163         { 0x3719, 0x86 },
 164         { 0x3810, 0x00 },
 165         { 0x3811, 0x10 },
 166         { 0x3812, 0x00 },
 167         { 0x3821, 0x01 },
 168         { 0x3824, 0x01 },
 169         { 0x3826, 0x03 },
 170         { 0x3828, 0x08 },
 171         { 0x3a19, 0xf8 },
 172         { 0x3c01, 0x34 },
 173         { 0x3c04, 0x28 },
 174         { 0x3c05, 0x98 },
 175         { 0x3c07, 0x07 },
 176         { 0x3c09, 0xc2 },
 177         { 0x3c0a, 0x9c },
 178         { 0x3c0b, 0x40 },
 179         { 0x3c01, 0x34 },
 180         { 0x4001, 0x02 },
 181         { 0x4514, 0x00 },
 182         { 0x4520, 0xb0 },
 183         { 0x460b, 0x37 },
 184         { 0x460c, 0x20 },
 185         { 0x4818, 0x01 },
 186         { 0x481d, 0xf0 },
 187         { 0x481f, 0x50 },
 188         { 0x4823, 0x70 },
 189         { 0x4831, 0x14 },
 190         { 0x5000, 0xa7 },
 191         { 0x5001, 0x83 },
 192         { 0x501d, 0x00 },
 193         { 0x501f, 0x00 },
 194         { 0x503d, 0x00 },
 195         { 0x505c, 0x30 },
 196         { 0x5181, 0x59 },
 197         { 0x5183, 0x00 },
 198         { 0x5191, 0xf0 },
 199         { 0x5192, 0x03 },
 200         { 0x5684, 0x10 },
 201         { 0x5685, 0xa0 },
 202         { 0x5686, 0x0c },
 203         { 0x5687, 0x78 },
 204         { 0x5a00, 0x08 },
 205         { 0x5a21, 0x00 },
 206         { 0x5a24, 0x00 },
 207         { 0x3008, 0x02 },
 208         { 0x3503, 0x00 },
 209         { 0x5180, 0xff },
 210         { 0x5181, 0xf2 },
 211         { 0x5182, 0x00 },
 212         { 0x5183, 0x14 },
 213         { 0x5184, 0x25 },
 214         { 0x5185, 0x24 },
 215         { 0x5186, 0x09 },
 216         { 0x5187, 0x09 },
 217         { 0x5188, 0x0a },
 218         { 0x5189, 0x75 },
 219         { 0x518a, 0x52 },
 220         { 0x518b, 0xea },
 221         { 0x518c, 0xa8 },
 222         { 0x518d, 0x42 },
 223         { 0x518e, 0x38 },
 224         { 0x518f, 0x56 },
 225         { 0x5190, 0x42 },
 226         { 0x5191, 0xf8 },
 227         { 0x5192, 0x04 },
 228         { 0x5193, 0x70 },
 229         { 0x5194, 0xf0 },
 230         { 0x5195, 0xf0 },
 231         { 0x5196, 0x03 },
 232         { 0x5197, 0x01 },
 233         { 0x5198, 0x04 },
 234         { 0x5199, 0x12 },
 235         { 0x519a, 0x04 },
 236         { 0x519b, 0x00 },
 237         { 0x519c, 0x06 },
 238         { 0x519d, 0x82 },
 239         { 0x519e, 0x38 },
 240         { 0x5381, 0x1e },
 241         { 0x5382, 0x5b },
 242         { 0x5383, 0x08 },
 243         { 0x5384, 0x0a },
 244         { 0x5385, 0x7e },
 245         { 0x5386, 0x88 },
 246         { 0x5387, 0x7c },
 247         { 0x5388, 0x6c },
 248         { 0x5389, 0x10 },
 249         { 0x538a, 0x01 },
 250         { 0x538b, 0x98 },
 251         { 0x5300, 0x08 },
 252         { 0x5301, 0x30 },
 253         { 0x5302, 0x10 },
 254         { 0x5303, 0x00 },
 255         { 0x5304, 0x08 },
 256         { 0x5305, 0x30 },
 257         { 0x5306, 0x08 },
 258         { 0x5307, 0x16 },
 259         { 0x5309, 0x08 },
 260         { 0x530a, 0x30 },
 261         { 0x530b, 0x04 },
 262         { 0x530c, 0x06 },
 263         { 0x5480, 0x01 },
 264         { 0x5481, 0x08 },
 265         { 0x5482, 0x14 },
 266         { 0x5483, 0x28 },
 267         { 0x5484, 0x51 },
 268         { 0x5485, 0x65 },
 269         { 0x5486, 0x71 },
 270         { 0x5487, 0x7d },
 271         { 0x5488, 0x87 },
 272         { 0x5489, 0x91 },
 273         { 0x548a, 0x9a },
 274         { 0x548b, 0xaa },
 275         { 0x548c, 0xb8 },
 276         { 0x548d, 0xcd },
 277         { 0x548e, 0xdd },
 278         { 0x548f, 0xea },
 279         { 0x5490, 0x1d },
 280         { 0x5580, 0x02 },
 281         { 0x5583, 0x40 },
 282         { 0x5584, 0x10 },
 283         { 0x5589, 0x10 },
 284         { 0x558a, 0x00 },
 285         { 0x558b, 0xf8 },
 286         { 0x5800, 0x3f },
 287         { 0x5801, 0x16 },
 288         { 0x5802, 0x0e },
 289         { 0x5803, 0x0d },
 290         { 0x5804, 0x17 },
 291         { 0x5805, 0x3f },
 292         { 0x5806, 0x0b },
 293         { 0x5807, 0x06 },
 294         { 0x5808, 0x04 },
 295         { 0x5809, 0x04 },
 296         { 0x580a, 0x06 },
 297         { 0x580b, 0x0b },
 298         { 0x580c, 0x09 },
 299         { 0x580d, 0x03 },
 300         { 0x580e, 0x00 },
 301         { 0x580f, 0x00 },
 302         { 0x5810, 0x03 },
 303         { 0x5811, 0x08 },
 304         { 0x5812, 0x0a },
 305         { 0x5813, 0x03 },
 306         { 0x5814, 0x00 },
 307         { 0x5815, 0x00 },
 308         { 0x5816, 0x04 },
 309         { 0x5817, 0x09 },
 310         { 0x5818, 0x0f },
 311         { 0x5819, 0x08 },
 312         { 0x581a, 0x06 },
 313         { 0x581b, 0x06 },
 314         { 0x581c, 0x08 },
 315         { 0x581d, 0x0c },
 316         { 0x581e, 0x3f },
 317         { 0x581f, 0x1e },
 318         { 0x5820, 0x12 },
 319         { 0x5821, 0x13 },
 320         { 0x5822, 0x21 },
 321         { 0x5823, 0x3f },
 322         { 0x5824, 0x68 },
 323         { 0x5825, 0x28 },
 324         { 0x5826, 0x2c },
 325         { 0x5827, 0x28 },
 326         { 0x5828, 0x08 },
 327         { 0x5829, 0x48 },
 328         { 0x582a, 0x64 },
 329         { 0x582b, 0x62 },
 330         { 0x582c, 0x64 },
 331         { 0x582d, 0x28 },
 332         { 0x582e, 0x46 },
 333         { 0x582f, 0x62 },
 334         { 0x5830, 0x60 },
 335         { 0x5831, 0x62 },
 336         { 0x5832, 0x26 },
 337         { 0x5833, 0x48 },
 338         { 0x5834, 0x66 },
 339         { 0x5835, 0x44 },
 340         { 0x5836, 0x64 },
 341         { 0x5837, 0x28 },
 342         { 0x5838, 0x66 },
 343         { 0x5839, 0x48 },
 344         { 0x583a, 0x2c },
 345         { 0x583b, 0x28 },
 346         { 0x583c, 0x26 },
 347         { 0x583d, 0xae },
 348         { 0x5025, 0x00 },
 349         { 0x3a0f, 0x30 },
 350         { 0x3a10, 0x28 },
 351         { 0x3a1b, 0x30 },
 352         { 0x3a1e, 0x26 },
 353         { 0x3a11, 0x60 },
 354         { 0x3a1f, 0x14 },
 355         { 0x0601, 0x02 },
 356         { 0x3008, 0x42 },
 357         { 0x3008, 0x02 }
 358 };
 359
 360 static const struct reg_value ov5645_setting_sxga[] = {
 361         { 0x3612, 0xa9 },
 362         { 0x3614, 0x50 },
 363         { 0x3618, 0x00 },
 364         { 0x3034, 0x18 },
 365         { 0x3035, 0x21 },
 366         { 0x3036, 0x70 },
 367         { 0x3600, 0x09 },
 368         { 0x3601, 0x43 },
 369         { 0x3708, 0x66 },
 370         { 0x370c, 0xc3 },
 371         { 0x3800, 0x00 },
 372         { 0x3801, 0x00 },
 373         { 0x3802, 0x00 },
 374         { 0x3803, 0x06 },
 375         { 0x3804, 0x0a },
 376         { 0x3805, 0x3f },
 377         { 0x3806, 0x07 },
 378         { 0x3807, 0x9d },
 379         { 0x3808, 0x05 },
 380         { 0x3809, 0x00 },
 381         { 0x380a, 0x03 },
 382         { 0x380b, 0xc0 },
 383         { 0x380c, 0x07 },
 384         { 0x380d, 0x68 },
 385         { 0x380e, 0x03 },
 386         { 0x380f, 0xd8 },
 387         { 0x3813, 0x06 },
 388         { 0x3814, 0x31 },
 389         { 0x3815, 0x31 },
 390         { 0x3820, 0x47 },
 391         { 0x3a02, 0x03 },
 392         { 0x3a03, 0xd8 },
 393         { 0x3a08, 0x01 },
 394         { 0x3a09, 0xf8 },
 395         { 0x3a0a, 0x01 },
 396         { 0x3a0b, 0xa4 },
 397         { 0x3a0e, 0x02 },
 398         { 0x3a0d, 0x02 },
 399         { 0x3a14, 0x03 },
 400         { 0x3a15, 0xd8 },
 401         { 0x3a18, 0x00 },
 402         { 0x4004, 0x02 },
 403         { 0x4005, 0x18 },
 404         { 0x4300, 0x32 },
 405         { 0x4202, 0x00 }
 406 };
 407
 408 static const struct reg_value ov5645_setting_1080p[] = {
 409         { 0x3612, 0xab },
 410         { 0x3614, 0x50 },
 411         { 0x3618, 0x04 },
 412         { 0x3034, 0x18 },
 413         { 0x3035, 0x11 },
 414         { 0x3036, 0x54 },
 415         { 0x3600, 0x08 },
 416         { 0x3601, 0x33 },
 417         { 0x3708, 0x63 },
 418         { 0x370c, 0xc0 },
 419         { 0x3800, 0x01 },
 420         { 0x3801, 0x50 },
 421         { 0x3802, 0x01 },
 422         { 0x3803, 0xb2 },
 423         { 0x3804, 0x08 },
 424         { 0x3805, 0xef },
 425         { 0x3806, 0x05 },
 426         { 0x3807, 0xf1 },
 427         { 0x3808, 0x07 },
 428         { 0x3809, 0x80 },
 429         { 0x380a, 0x04 },
 430         { 0x380b, 0x38 },
 431         { 0x380c, 0x09 },
 432         { 0x380d, 0xc4 },
 433         { 0x380e, 0x04 },
 434         { 0x380f, 0x60 },
 435         { 0x3813, 0x04 },
 436         { 0x3814, 0x11 },
 437         { 0x3815, 0x11 },
 438         { 0x3820, 0x47 },
 439         { 0x4514, 0x88 },
 440         { 0x3a02, 0x04 },
 441         { 0x3a03, 0x60 },
 442         { 0x3a08, 0x01 },
 443         { 0x3a09, 0x50 },
 444         { 0x3a0a, 0x01 },
 445         { 0x3a0b, 0x18 },
 446         { 0x3a0e, 0x03 },
 447         { 0x3a0d, 0x04 },
 448         { 0x3a14, 0x04 },
 449         { 0x3a15, 0x60 },
 450         { 0x3a18, 0x00 },
 451         { 0x4004, 0x06 },
 452         { 0x4005, 0x18 },
 453         { 0x4300, 0x32 },
 454         { 0x4202, 0x00 },
 455         { 0x4837, 0x0b }
 456 };
 457
 458 static const struct reg_value ov5645_setting_full[] = {
 459         { 0x3612, 0xab },
 460         { 0x3614, 0x50 },
 461         { 0x3618, 0x04 },
 462         { 0x3034, 0x18 },
 463         { 0x3035, 0x11 },
 464         { 0x3036, 0x54 },
 465         { 0x3600, 0x08 },
 466         { 0x3601, 0x33 },
 467         { 0x3708, 0x63 },
 468         { 0x370c, 0xc0 },
 469         { 0x3800, 0x00 },
 470         { 0x3801, 0x00 },
 471         { 0x3802, 0x00 },
 472         { 0x3803, 0x00 },
 473         { 0x3804, 0x0a },
 474         { 0x3805, 0x3f },
 475         { 0x3806, 0x07 },
 476         { 0x3807, 0x9f },
 477         { 0x3808, 0x0a },
 478         { 0x3809, 0x20 },
 479         { 0x380a, 0x07 },
 480         { 0x380b, 0x98 },
 481         { 0x380c, 0x0b },
 482         { 0x380d, 0x1c },
 483         { 0x380e, 0x07 },
 484         { 0x380f, 0xb0 },
 485         { 0x3813, 0x06 },
 486         { 0x3814, 0x11 },
 487         { 0x3815, 0x11 },
 488         { 0x3820, 0x47 },
 489         { 0x4514, 0x88 },
 490         { 0x3a02, 0x07 },
 491         { 0x3a03, 0xb0 },
 492         { 0x3a08, 0x01 },
 493         { 0x3a09, 0x27 },
 494         { 0x3a0a, 0x00 },
 495         { 0x3a0b, 0xf6 },
 496         { 0x3a0e, 0x06 },
 497         { 0x3a0d, 0x08 },
 498         { 0x3a14, 0x07 },
 499         { 0x3a15, 0xb0 },
 500         { 0x3a18, 0x01 },
 501         { 0x4004, 0x06 },
 502         { 0x4005, 0x18 },
 503         { 0x4300, 0x32 },
 504         { 0x4837, 0x0b },
 505         { 0x4202, 0x00 }
 506 };
 507
 508 static const struct ov5645_mode_info ov5645_mode_info_data[] = {
 509         {
 510                 .width = 1280,
 511                 .height = 960,
 512                 .data = ov5645_setting_sxga,
 513                 .data_size = ARRAY_SIZE(ov5645_setting_sxga)
 514         },
 515         {
 516                 .width = 1920,
 517                 .height = 1080,
 518                 .data = ov5645_setting_1080p,
 519                 .data_size = ARRAY_SIZE(ov5645_setting_1080p)
 520         },
 521         {
 522                 .width = 2592,
 523                 .height = 1944,
 524                 .data = ov5645_setting_full,
 525                 .data_size = ARRAY_SIZE(ov5645_setting_full)
 526         },
 527 };
 528
 529 static int ov5645_regulators_enable(struct ov5645 *ov5645)
 530 {
 531         int ret;
 532
 533         ret = regulator_enable(ov5645->io_regulator);
 534         if (ret < 0) {
 535                 dev_err(ov5645->dev, "set io voltage failed\n");
 536                 return ret;
 537         }
 538
 539         ret = regulator_enable(ov5645->analog_regulator);
 540         if (ret) {
 541                 dev_err(ov5645->dev, "set analog voltage failed\n");
 542                 goto err_disable_io;
 543         }
 544
 545         ret = regulator_enable(ov5645->core_regulator);
 546         if (ret) {
 547                 dev_err(ov5645->dev, "set core voltage failed\n");
 548                 goto err_disable_analog;
 549         }
 550
 551         return 0;
 552
 553 err_disable_analog:
 554         regulator_disable(ov5645->analog_regulator);
 555 err_disable_io:
 556         regulator_disable(ov5645->io_regulator);
 557
 558         return ret;
 559 }
 560
 561 static void ov5645_regulators_disable(struct ov5645 *ov5645)
 562 {
 563         int ret;
 564
 565         ret = regulator_disable(ov5645->core_regulator);
 566         if (ret < 0)
 567                 dev_err(ov5645->dev, "core regulator disable failed\n");
 568
 569         ret = regulator_disable(ov5645->analog_regulator);
 570         if (ret < 0)
 571                 dev_err(ov5645->dev, "analog regulator disable failed\n");
 572
 573         ret = regulator_disable(ov5645->io_regulator);
 574         if (ret < 0)
 575                 dev_err(ov5645->dev, "io regulator disable failed\n");
 576 }
 577
 578 static int ov5645_write_reg(struct ov5645 *ov5645, u16 reg, u8 val)
 579 {
 580         u8 regbuf[3];
 581         int ret;
 582
 583         regbuf[0] = reg >> 8;
 584         regbuf[1] = reg & 0xff;
 585         regbuf[2] = val;
 586
 587         ret = i2c_master_send(ov5645->i2c_client, regbuf, 3);
 588         if (ret < 0)
 589                 dev_err(ov5645->dev, "%s: write reg error %d: reg=%x, val=%x\n",
 590                         __func__, ret, reg, val);
 591
 592         return ret;
 593 }
 594
 595 static int ov5645_read_reg(struct ov5645 *ov5645, u16 reg, u8 *val)
 596 {
 597         u8 regbuf[2];
 598         int ret;
 599
 600         regbuf[0] = reg >> 8;
 601         regbuf[1] = reg & 0xff;
 602
 603         ret = i2c_master_send(ov5645->i2c_client, regbuf, 2);
 604         if (ret < 0) {
 605                 dev_err(ov5645->dev, "%s: write reg error %d: reg=%x\n",
 606                         __func__, ret, reg);
 607                 return ret;
 608         }
 609
 610         ret = i2c_master_recv(ov5645->i2c_client, val, 1);
 611         if (ret < 0) {
 612                 dev_err(ov5645->dev, "%s: read reg error %d: reg=%x\n",
 613                         __func__, ret, reg);
 614                 return ret;
 615         }
 616
 617         return 0;
 618 }
 619
 620 static int ov5645_set_aec_mode(struct ov5645 *ov5645, u32 mode)
 621 {
 622         u8 val = ov5645->aec_pk_manual;
 623         int ret;
 624
 625         if (mode == V4L2_EXPOSURE_AUTO)
 626                 val &= ~OV5645_AEC_MANUAL_ENABLE;
 627         else /* V4L2_EXPOSURE_MANUAL */
 628                 val |= OV5645_AEC_MANUAL_ENABLE;
 629
 630         ret = ov5645_write_reg(ov5645, OV5645_AEC_PK_MANUAL, val);
 631         if (!ret)
 632                 ov5645->aec_pk_manual = val;
 633
 634         return ret;
 635 }
 636
 637 static int ov5645_set_agc_mode(struct ov5645 *ov5645, u32 enable)
 638 {
 639         u8 val = ov5645->aec_pk_manual;
 640         int ret;
 641
 642         if (enable)
 643                 val &= ~OV5645_AGC_MANUAL_ENABLE;
 644         else
 645                 val |= OV5645_AGC_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_register_array(struct ov5645 *ov5645,
 655                                      const struct reg_value *settings,
 656                                      unsigned int num_settings)
 657 {
 658         unsigned int i;
 659         int ret;
 660
 661         for (i = 0; i < num_settings; ++i, ++settings) {
 662                 ret = ov5645_write_reg(ov5645, settings->reg, settings->val);
 663                 if (ret < 0)
 664                         return ret;
 665         }
 666
 667         return 0;
 668 }
 669
 670 static int ov5645_set_power_on(struct ov5645 *ov5645)
 671 {
 672         int ret;
 673
 674         ret = ov5645_regulators_enable(ov5645);
 675         if (ret < 0) {
 676                 return ret;
 677         }
 678
 679         ret = clk_prepare_enable(ov5645->xclk);
 680         if (ret < 0) {
 681                 dev_err(ov5645->dev, "clk prepare enable failed\n");
 682                 ov5645_regulators_disable(ov5645);
 683                 return ret;
 684         }
 685
 686         usleep_range(5000, 15000);
 687         gpiod_set_value_cansleep(ov5645->enable_gpio, 1);
 688
 689         usleep_range(1000, 2000);
 690         gpiod_set_value_cansleep(ov5645->rst_gpio, 0);
 691
 692         msleep(20);
 693
 694         return 0;
 695 }
 696
 697 static void ov5645_set_power_off(struct ov5645 *ov5645)
 698 {
 699         gpiod_set_value_cansleep(ov5645->rst_gpio, 1);
 700         gpiod_set_value_cansleep(ov5645->enable_gpio, 0);
 701         clk_disable_unprepare(ov5645->xclk);
 702         ov5645_regulators_disable(ov5645);
 703 }
 704
 705 static int ov5645_s_power(struct v4l2_subdev *sd, int on)
 706 {
 707         struct ov5645 *ov5645 = to_ov5645(sd);
 708         int ret = 0;
 709
 710         mutex_lock(&ov5645->power_lock);
 711
 712         /* If the power count is modified from 0 to != 0 or from != 0 to 0,
 713          * update the power state.
 714          */
 715         if (ov5645->power_count == !on) {
 716                 if (on) {
 717                         ret = ov5645_set_power_on(ov5645);
 718                         if (ret < 0)
 719                                 goto exit;
 720
 721                         ret = ov5645_set_register_array(ov5645,
 722                                         ov5645_global_init_setting,
 723                                         ARRAY_SIZE(ov5645_global_init_setting));
 724                         if (ret < 0) {
 725                                 dev_err(ov5645->dev,
 726                                         "could not set init registers\n");
 727                                 ov5645_set_power_off(ov5645);
 728                                 goto exit;
 729                         }
 730
 731                         ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
 732                                                OV5645_SYSTEM_CTRL0_STOP);
 733                         if (ret < 0) {
 734                                 ov5645_set_power_off(ov5645);
 735                                 goto exit;
 736                         }
 737                 } else {
 738                         ov5645_set_power_off(ov5645);
 739                 }
 740         }
 741
 742         /* Update the power count. */
 743         ov5645->power_count += on ? 1 : -1;
 744         WARN_ON(ov5645->power_count < 0);
 745
 746 exit:
 747         mutex_unlock(&ov5645->power_lock);
 748
 749         return ret;
 750 }
 751
 752 static int ov5645_set_saturation(struct ov5645 *ov5645, s32 value)
 753 {
 754         u32 reg_value = (value * 0x10) + 0x40;
 755         int ret;
 756
 757         ret = ov5645_write_reg(ov5645, OV5645_SDE_SAT_U, reg_value);
 758         if (ret < 0)
 759                 return ret;
 760
 761         return ov5645_write_reg(ov5645, OV5645_SDE_SAT_V, reg_value);
 762 }
 763
 764 static int ov5645_set_hflip(struct ov5645 *ov5645, s32 value)
 765 {
 766         u8 val = ov5645->timing_tc_reg21;
 767         int ret;
 768
 769         if (value == 0)
 770                 val &= ~(OV5645_SENSOR_MIRROR);
 771         else
 772                 val |= (OV5645_SENSOR_MIRROR);
 773
 774         ret = ov5645_write_reg(ov5645, OV5645_TIMING_TC_REG21, val);
 775         if (!ret)
 776                 ov5645->timing_tc_reg21 = val;
 777
 778         return ret;
 779 }
 780
 781 static int ov5645_set_vflip(struct ov5645 *ov5645, s32 value)
 782 {
 783         u8 val = ov5645->timing_tc_reg20;
 784         int ret;
 785
 786         if (value == 0)
 787                 val |= (OV5645_SENSOR_VFLIP | OV5645_ISP_VFLIP);
 788         else
 789                 val &= ~(OV5645_SENSOR_VFLIP | OV5645_ISP_VFLIP);
 790
 791         ret = ov5645_write_reg(ov5645, OV5645_TIMING_TC_REG20, val);
 792         if (!ret)
 793                 ov5645->timing_tc_reg20 = val;
 794
 795         return ret;
 796 }
 797
 798 static int ov5645_set_test_pattern(struct ov5645 *ov5645, s32 value)
 799 {
 800         u8 val = 0;
 801
 802         if (value) {
 803                 val = OV5645_SET_TEST_PATTERN(value - 1);
 804                 val |= OV5645_TEST_PATTERN_ENABLE;
 805         }
 806
 807         return ov5645_write_reg(ov5645, OV5645_PRE_ISP_TEST_SETTING_1, val);
 808 }
 809
 810 static const char * const ov5645_test_pattern_menu[] = {
 811         "Disabled",
 812         "Vertical Color Bars",
 813         "Pseudo-Random Data",
 814         "Color Square",
 815         "Black Image",
 816 };
 817
 818 static int ov5645_set_awb(struct ov5645 *ov5645, s32 enable_auto)
 819 {
 820         u8 val = 0;
 821
 822         if (!enable_auto)
 823                 val = OV5645_AWB_MANUAL_ENABLE;
 824
 825         return ov5645_write_reg(ov5645, OV5645_AWB_MANUAL_CONTROL, val);
 826 }
 827
 828 static int ov5645_s_ctrl(struct v4l2_ctrl *ctrl)
 829 {
 830         struct ov5645 *ov5645 = container_of(ctrl->handler,
 831                                              struct ov5645, ctrls);
 832         int ret;
 833
 834         mutex_lock(&ov5645->power_lock);
 835         if (!ov5645->power_count) {
 836                 mutex_unlock(&ov5645->power_lock);
 837                 return 0;
 838         }
 839
 840         switch (ctrl->id) {
 841         case V4L2_CID_SATURATION:
 842                 ret = ov5645_set_saturation(ov5645, ctrl->val);
 843                 break;
 844         case V4L2_CID_AUTO_WHITE_BALANCE:
 845                 ret = ov5645_set_awb(ov5645, ctrl->val);
 846                 break;
 847         case V4L2_CID_AUTOGAIN:
 848                 ret = ov5645_set_agc_mode(ov5645, ctrl->val);
 849                 break;
 850         case V4L2_CID_EXPOSURE_AUTO:
 851                 ret = ov5645_set_aec_mode(ov5645, ctrl->val);
 852                 break;
 853         case V4L2_CID_TEST_PATTERN:
 854                 ret = ov5645_set_test_pattern(ov5645, ctrl->val);
 855                 break;
 856         case V4L2_CID_HFLIP:
 857                 ret = ov5645_set_hflip(ov5645, ctrl->val);
 858                 break;
 859         case V4L2_CID_VFLIP:
 860                 ret = ov5645_set_vflip(ov5645, ctrl->val);
 861                 break;
 862         default:
 863                 ret = -EINVAL;
 864                 break;
 865         }
 866
 867         mutex_unlock(&ov5645->power_lock);
 868
 869         return ret;
 870 }
 871
 872 static struct v4l2_ctrl_ops ov5645_ctrl_ops = {
 873         .s_ctrl = ov5645_s_ctrl,
 874 };
 875
 876 static int ov5645_enum_mbus_code(struct v4l2_subdev *sd,
 877                                  struct v4l2_subdev_pad_config *cfg,
 878                                  struct v4l2_subdev_mbus_code_enum *code)
 879 {
 880         if (code->index > 0)
 881                 return -EINVAL;
 882
 883         code->code = MEDIA_BUS_FMT_UYVY8_2X8;
 884
 885         return 0;
 886 }
 887
 888 static int ov5645_enum_frame_size(struct v4l2_subdev *subdev,
 889                                   struct v4l2_subdev_pad_config *cfg,
 890                                   struct v4l2_subdev_frame_size_enum *fse)
 891 {
 892         if (fse->code != MEDIA_BUS_FMT_UYVY8_2X8)
 893                 return -EINVAL;
 894
 895         if (fse->index >= ARRAY_SIZE(ov5645_mode_info_data))
 896                 return -EINVAL;
 897
 898         fse->min_width = ov5645_mode_info_data[fse->index].width;
 899         fse->max_width = ov5645_mode_info_data[fse->index].width;
 900         fse->min_height = ov5645_mode_info_data[fse->index].height;
 901         fse->max_height = ov5645_mode_info_data[fse->index].height;
 902
 903         return 0;
 904 }
 905
 906 static struct v4l2_mbus_framefmt *
 907 __ov5645_get_pad_format(struct ov5645 *ov5645,
 908                         struct v4l2_subdev_pad_config *cfg,
 909                         unsigned int pad,
 910                         enum v4l2_subdev_format_whence which)
 911 {
 912         switch (which) {
 913         case V4L2_SUBDEV_FORMAT_TRY:
 914                 return v4l2_subdev_get_try_format(&ov5645->sd, cfg, pad);
 915         case V4L2_SUBDEV_FORMAT_ACTIVE:
 916                 return &ov5645->fmt;
 917         default:
 918                 return NULL;
 919         }
 920 }
 921
 922 static int ov5645_get_format(struct v4l2_subdev *sd,
 923                              struct v4l2_subdev_pad_config *cfg,
 924                              struct v4l2_subdev_format *format)
 925 {
 926         struct ov5645 *ov5645 = to_ov5645(sd);
 927
 928         format->format = *__ov5645_get_pad_format(ov5645, cfg, format->pad,
 929                                                   format->which);
 930         return 0;
 931 }
 932
 933 static struct v4l2_rect *
 934 __ov5645_get_pad_crop(struct ov5645 *ov5645, struct v4l2_subdev_pad_config *cfg,
 935                       unsigned int pad, enum v4l2_subdev_format_whence which)
 936 {
 937         switch (which) {
 938         case V4L2_SUBDEV_FORMAT_TRY:
 939                 return v4l2_subdev_get_try_crop(&ov5645->sd, cfg, pad);
 940         case V4L2_SUBDEV_FORMAT_ACTIVE:
 941                 return &ov5645->crop;
 942         default:
 943                 return NULL;
 944         }
 945 }
 946
 947 static const struct ov5645_mode_info *
 948 ov5645_find_nearest_mode(unsigned int width, unsigned int height)
 949 {
 950         int i;
 951
 952         for (i = ARRAY_SIZE(ov5645_mode_info_data) - 1; i >= 0; i--) {
 953                 if (ov5645_mode_info_data[i].width <= width &&
 954                     ov5645_mode_info_data[i].height <= height)
 955                         break;
 956         }
 957
 958         if (i < 0)
 959                 i = 0;
 960
 961         return &ov5645_mode_info_data[i];
 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
 973         __crop = __ov5645_get_pad_crop(ov5645, cfg, format->pad,
 974                         format->which);
 975
 976         new_mode = ov5645_find_nearest_mode(format->format.width,
 977                                             format->format.height);
 978         __crop->width = new_mode->width;
 979         __crop->height = new_mode->height;
 980
 981         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 982                 ov5645->current_mode = new_mode;
 983
 984         __format = __ov5645_get_pad_format(ov5645, cfg, format->pad,
 985                         format->which);
 986         __format->width = __crop->width;
 987         __format->height = __crop->height;
 988         __format->code = MEDIA_BUS_FMT_UYVY8_2X8;
 989         __format->field = V4L2_FIELD_NONE;
 990         __format->colorspace = V4L2_COLORSPACE_SRGB;
 991
 992         format->format = *__format;
 993
 994         return 0;
 995 }
 996
 997 static int ov5645_entity_init_cfg(struct v4l2_subdev *subdev,
 998                                   struct v4l2_subdev_pad_config *cfg)
 999 {
1000         struct v4l2_subdev_format fmt = { 0 };
1001
1002         fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
1003         fmt.format.width = 1920;
1004         fmt.format.height = 1080;
1005
1006         ov5645_set_format(subdev, cfg, &fmt);
1007
1008         return 0;
1009 }
1010
1011 static int ov5645_get_selection(struct v4l2_subdev *sd,
1012                            struct v4l2_subdev_pad_config *cfg,
1013                            struct v4l2_subdev_selection *sel)
1014 {
1015         struct ov5645 *ov5645 = to_ov5645(sd);
1016
1017         if (sel->target != V4L2_SEL_TGT_CROP)
1018                 return -EINVAL;
1019
1020         sel->r = *__ov5645_get_pad_crop(ov5645, cfg, sel->pad,
1021                                         sel->which);
1022         return 0;
1023 }
1024
1025 static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable)
1026 {
1027         struct ov5645 *ov5645 = to_ov5645(subdev);
1028         int ret;
1029
1030         if (enable) {
1031                 ret = ov5645_set_register_array(ov5645,
1032                                         ov5645->current_mode->data,
1033                                         ov5645->current_mode->data_size);
1034                 if (ret < 0) {
1035                         dev_err(ov5645->dev, "could not set mode %dx%d\n",
1036                                 ov5645->current_mode->width,
1037                                 ov5645->current_mode->height);
1038                         return ret;
1039                 }
1040                 ret = v4l2_ctrl_handler_setup(&ov5645->ctrls);
1041                 if (ret < 0) {
1042                         dev_err(ov5645->dev, "could not sync v4l2 controls\n");
1043                         return ret;
1044                 }
1045                 ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
1046                                        OV5645_SYSTEM_CTRL0_START);
1047                 if (ret < 0)
1048                         return ret;
1049         } else {
1050                 ret = ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
1051                                        OV5645_SYSTEM_CTRL0_STOP);
1052                 if (ret < 0)
1053                         return ret;
1054         }
1055
1056         return 0;
1057 }
1058
1059 static const struct v4l2_subdev_core_ops ov5645_core_ops = {
1060         .s_power = ov5645_s_power,
1061 };
1062
1063 static const struct v4l2_subdev_video_ops ov5645_video_ops = {
1064         .s_stream = ov5645_s_stream,
1065 };
1066
1067 static const struct v4l2_subdev_pad_ops ov5645_subdev_pad_ops = {
1068         .init_cfg = ov5645_entity_init_cfg,
1069         .enum_mbus_code = ov5645_enum_mbus_code,
1070         .enum_frame_size = ov5645_enum_frame_size,
1071         .get_fmt = ov5645_get_format,
1072         .set_fmt = ov5645_set_format,
1073         .get_selection = ov5645_get_selection,
1074 };
1075
1076 static const struct v4l2_subdev_ops ov5645_subdev_ops = {
1077         .core = &ov5645_core_ops,
1078         .video = &ov5645_video_ops,
1079         .pad = &ov5645_subdev_pad_ops,
1080 };
1081
1082 static int ov5645_probe(struct i2c_client *client,
1083                         const struct i2c_device_id *id)
1084 {
1085         struct device *dev = &client->dev;
1086         struct device_node *endpoint;
1087         struct ov5645 *ov5645;
1088         u8 chip_id_high, chip_id_low;
1089         u32 xclk_freq;
1090         int ret;
1091
1092         ov5645 = devm_kzalloc(dev, sizeof(struct ov5645), GFP_KERNEL);
1093         if (!ov5645)
1094                 return -ENOMEM;
1095
1096         ov5645->i2c_client = client;
1097         ov5645->dev = dev;
1098
1099         endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
1100         if (!endpoint) {
1101                 dev_err(dev, "endpoint node not found\n");
1102                 return -EINVAL;
1103         }
1104
1105         ret = v4l2_of_parse_endpoint(endpoint, &ov5645->ep);
1106         if (ret < 0) {
1107                 dev_err(dev, "parsing endpoint node failed\n");
1108                 return ret;
1109         }
1110
1111         of_node_put(endpoint);
1112
1113         if (ov5645->ep.bus_type != V4L2_MBUS_CSI2) {
1114                 dev_err(dev, "invalid bus type, must be CSI2\n");
1115                 return -EINVAL;
1116         }
1117
1118         /* get system clock (xclk) */
1119         ov5645->xclk = devm_clk_get(dev, "xclk");
1120         if (IS_ERR(ov5645->xclk)) {
1121                 dev_err(dev, "could not get xclk");
1122                 return PTR_ERR(ov5645->xclk);
1123         }
1124
1125         ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq);
1126         if (ret) {
1127                 dev_err(dev, "could not get xclk frequency\n");
1128                 return ret;
1129         }
1130
1131         if (xclk_freq != 23880000) {
1132                 dev_err(dev, "external clock frequency %u is not supported\n",
1133                         xclk_freq);
1134                 return -EINVAL;
1135         }
1136
1137         ret = clk_set_rate(ov5645->xclk, xclk_freq);
1138         if (ret) {
1139                 dev_err(dev, "could not set xclk frequency\n");
1140                 return ret;
1141         }
1142
1143         ov5645->io_regulator = devm_regulator_get(dev, "vdddo");
1144         if (IS_ERR(ov5645->io_regulator)) {
1145                 dev_err(dev, "cannot get io regulator\n");
1146                 return PTR_ERR(ov5645->io_regulator);
1147         }
1148
1149         ret = regulator_set_voltage(ov5645->io_regulator,
1150                                     OV5645_VOLTAGE_DIGITAL_IO,
1151                                     OV5645_VOLTAGE_DIGITAL_IO);
1152         if (ret < 0) {
1153                 dev_err(dev, "cannot set io voltage\n");
1154                 return ret;
1155         }
1156
1157         ov5645->core_regulator = devm_regulator_get(dev, "vddd");
1158         if (IS_ERR(ov5645->core_regulator)) {
1159                 dev_err(dev, "cannot get core regulator\n");
1160                 return PTR_ERR(ov5645->core_regulator);
1161         }
1162
1163         ret = regulator_set_voltage(ov5645->core_regulator,
1164                                     OV5645_VOLTAGE_DIGITAL_CORE,
1165                                     OV5645_VOLTAGE_DIGITAL_CORE);
1166         if (ret < 0) {
1167                 dev_err(dev, "cannot set core voltage\n");
1168                 return ret;
1169         }
1170
1171         ov5645->analog_regulator = devm_regulator_get(dev, "vdda");
1172         if (IS_ERR(ov5645->analog_regulator)) {
1173                 dev_err(dev, "cannot get analog regulator\n");
1174                 return PTR_ERR(ov5645->analog_regulator);
1175         }
1176
1177         ret = regulator_set_voltage(ov5645->analog_regulator,
1178                                     OV5645_VOLTAGE_ANALOG,
1179                                     OV5645_VOLTAGE_ANALOG);
1180         if (ret < 0) {
1181                 dev_err(dev, "cannot set analog voltage\n");
1182                 return ret;
1183         }
1184
1185         ov5645->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH);
1186         if (IS_ERR(ov5645->enable_gpio)) {
1187                 dev_err(dev, "cannot get enable gpio\n");
1188                 return PTR_ERR(ov5645->enable_gpio);
1189         }
1190
1191         ov5645->rst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
1192         if (IS_ERR(ov5645->rst_gpio)) {
1193                 dev_err(dev, "cannot get reset gpio\n");
1194                 return PTR_ERR(ov5645->rst_gpio);
1195         }
1196
1197         mutex_init(&ov5645->power_lock);
1198
1199         v4l2_ctrl_handler_init(&ov5645->ctrls, 7);
1200         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1201                           V4L2_CID_SATURATION, -4, 4, 1, 0);
1202         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1203                           V4L2_CID_HFLIP, 0, 1, 1, 0);
1204         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1205                           V4L2_CID_VFLIP, 0, 1, 1, 0);
1206         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1207                           V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
1208         v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
1209                           V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1210         v4l2_ctrl_new_std_menu(&ov5645->ctrls, &ov5645_ctrl_ops,
1211                                V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL,
1212                                0, V4L2_EXPOSURE_AUTO);
1213         v4l2_ctrl_new_std_menu_items(&ov5645->ctrls, &ov5645_ctrl_ops,
1214                                      V4L2_CID_TEST_PATTERN,
1215                                      ARRAY_SIZE(ov5645_test_pattern_menu) - 1,
1216                                      0, 0, ov5645_test_pattern_menu);
1217
1218         ov5645->sd.ctrl_handler = &ov5645->ctrls;
1219
1220         if (ov5645->ctrls.error) {
1221                 dev_err(dev, "%s: control initialization error %d\n",
1222                        __func__, ov5645->ctrls.error);
1223                 ret = ov5645->ctrls.error;
1224                 goto free_ctrl;
1225         }
1226
1227         v4l2_i2c_subdev_init(&ov5645->sd, client, &ov5645_subdev_ops);
1228         ov5645->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1229         ov5645->pad.flags = MEDIA_PAD_FL_SOURCE;
1230         ov5645->sd.dev = &client->dev;
1231
1232         ret = media_entity_pads_init(&ov5645->sd.entity, 1, &ov5645->pad);
1233         if (ret < 0) {
1234                 dev_err(dev, "could not register media entity\n");
1235                 goto free_ctrl;
1236         }
1237
1238         ret = ov5645_s_power(&ov5645->sd, true);
1239         if (ret < 0) {
1240                 dev_err(dev, "could not power up OV5645\n");
1241                 goto free_entity;
1242         }
1243
1244         ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_HIGH, &chip_id_high);
1245         if (ret < 0 || chip_id_high != OV5645_CHIP_ID_HIGH_BYTE) {
1246                 dev_err(dev, "could not read ID high\n");
1247                 ret = -ENODEV;
1248                 goto power_down;
1249         }
1250         ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_LOW, &chip_id_low);
1251         if (ret < 0 || chip_id_low != OV5645_CHIP_ID_LOW_BYTE) {
1252                 dev_err(dev, "could not read ID low\n");
1253                 ret = -ENODEV;
1254                 goto power_down;
1255         }
1256
1257         dev_info(dev, "OV5645 detected at address 0x%02x\n", client->addr);
1258
1259         ret = ov5645_read_reg(ov5645, OV5645_AEC_PK_MANUAL,
1260                               &ov5645->aec_pk_manual);
1261         if (ret < 0) {
1262                 dev_err(dev, "could not read AEC/AGC mode\n");
1263                 ret = -ENODEV;
1264                 goto power_down;
1265         }
1266
1267         ret = ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG20,
1268                               &ov5645->timing_tc_reg20);
1269         if (ret < 0) {
1270                 dev_err(dev, "could not read vflip value\n");
1271                 ret = -ENODEV;
1272                 goto power_down;
1273         }
1274
1275         ret = ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG21,
1276                               &ov5645->timing_tc_reg21);
1277         if (ret < 0) {
1278                 dev_err(dev, "could not read hflip value\n");
1279                 ret = -ENODEV;
1280                 goto power_down;
1281         }
1282
1283         ov5645_s_power(&ov5645->sd, false);
1284
1285         ret = v4l2_async_register_subdev(&ov5645->sd);
1286         if (ret < 0) {
1287                 dev_err(dev, "could not register v4l2 device\n");
1288                 goto free_entity;
1289         }
1290
1291         ov5645_entity_init_cfg(&ov5645->sd, NULL);
1292
1293         return 0;
1294
1295 power_down:
1296         ov5645_s_power(&ov5645->sd, false);
1297 free_entity:
1298         media_entity_cleanup(&ov5645->sd.entity);
1299 free_ctrl:
1300         v4l2_ctrl_handler_free(&ov5645->ctrls);
1301         mutex_destroy(&ov5645->power_lock);
1302
1303         return ret;
1304 }
1305
1306 static int ov5645_remove(struct i2c_client *client)
1307 {
1308         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1309         struct ov5645 *ov5645 = to_ov5645(sd);
1310
1311         v4l2_async_unregister_subdev(&ov5645->sd);
1312         media_entity_cleanup(&ov5645->sd.entity);
1313         v4l2_ctrl_handler_free(&ov5645->ctrls);
1314         mutex_destroy(&ov5645->power_lock);
1315
1316         return 0;
1317 }
1318
1319 static const struct i2c_device_id ov5645_id[] = {
1320         { "ov5645", 0 },
1321         {}
1322 };
1323 MODULE_DEVICE_TABLE(i2c, ov5645_id);
1324
1325 static const struct of_device_id ov5645_of_match[] = {
1326         { .compatible = "ovti,ov5645" },
1327         { /* sentinel */ }
1328 };
1329 MODULE_DEVICE_TABLE(of, ov5645_of_match);
1330
1331 static struct i2c_driver ov5645_i2c_driver = {
1332         .driver = {
1333                 .of_match_table = of_match_ptr(ov5645_of_match),
1334                 .name  = "ov5645",
1335         },
1336         .probe  = ov5645_probe,
1337         .remove = ov5645_remove,
1338         .id_table = ov5645_id,
1339 };
1340
1341 module_i2c_driver(ov5645_i2c_driver);
1342
1343 MODULE_DESCRIPTION("Omnivision OV5645 Camera Driver");
1344 MODULE_AUTHOR("Todor Tomov <todor.tomov@linaro.org>");
1345 MODULE_LICENSE("GPL v2");