drivers/media/i2c/ov5640.c

   1 /*
   2  * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
   3  * Copyright (C) 2014-2017 Mentor Graphics Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/clk.h>
  12 #include <linux/clk-provider.h>
  13 #include <linux/clkdev.h>
  14 #include <linux/ctype.h>
  15 #include <linux/delay.h>
  16 #include <linux/device.h>
  17 #include <linux/gpio/consumer.h>
  18 #include <linux/i2c.h>
  19 #include <linux/init.h>
  20 #include <linux/module.h>
  21 #include <linux/of_device.h>
  22 #include <linux/regulator/consumer.h>
  23 #include <linux/slab.h>
  24 #include <linux/types.h>
  25 #include <media/v4l2-async.h>
  26 #include <media/v4l2-ctrls.h>
  27 #include <media/v4l2-device.h>
  28 #include <media/v4l2-event.h>
  29 #include <media/v4l2-fwnode.h>
  30 #include <media/v4l2-subdev.h>
  31
  32 /* min/typical/max system clock (xclk) frequencies */
  33 #define OV5640_XCLK_MIN  6000000
  34 #define OV5640_XCLK_MAX 54000000
  35
  36 #define OV5640_DEFAULT_SLAVE_ID 0x3c
  37
  38 #define OV5640_REG_SYS_RESET02          0x3002
  39 #define OV5640_REG_SYS_CLOCK_ENABLE02   0x3006
  40 #define OV5640_REG_SYS_CTRL0            0x3008
  41 #define OV5640_REG_CHIP_ID              0x300a
  42 #define OV5640_REG_IO_MIPI_CTRL00       0x300e
  43 #define OV5640_REG_PAD_OUTPUT_ENABLE01  0x3017
  44 #define OV5640_REG_PAD_OUTPUT_ENABLE02  0x3018
  45 #define OV5640_REG_PAD_OUTPUT00         0x3019
  46 #define OV5640_REG_SYSTEM_CONTROL1      0x302e
  47 #define OV5640_REG_SC_PLL_CTRL0         0x3034
  48 #define OV5640_REG_SC_PLL_CTRL1         0x3035
  49 #define OV5640_REG_SC_PLL_CTRL2         0x3036
  50 #define OV5640_REG_SC_PLL_CTRL3         0x3037
  51 #define OV5640_REG_SLAVE_ID             0x3100
  52 #define OV5640_REG_SCCB_SYS_CTRL1       0x3103
  53 #define OV5640_REG_SYS_ROOT_DIVIDER     0x3108
  54 #define OV5640_REG_AWB_R_GAIN           0x3400
  55 #define OV5640_REG_AWB_G_GAIN           0x3402
  56 #define OV5640_REG_AWB_B_GAIN           0x3404
  57 #define OV5640_REG_AWB_MANUAL_CTRL      0x3406
  58 #define OV5640_REG_AEC_PK_EXPOSURE_HI   0x3500
  59 #define OV5640_REG_AEC_PK_EXPOSURE_MED  0x3501
  60 #define OV5640_REG_AEC_PK_EXPOSURE_LO   0x3502
  61 #define OV5640_REG_AEC_PK_MANUAL        0x3503
  62 #define OV5640_REG_AEC_PK_REAL_GAIN     0x350a
  63 #define OV5640_REG_AEC_PK_VTS           0x350c
  64 #define OV5640_REG_TIMING_DVPHO         0x3808
  65 #define OV5640_REG_TIMING_DVPVO         0x380a
  66 #define OV5640_REG_TIMING_HTS           0x380c
  67 #define OV5640_REG_TIMING_VTS           0x380e
  68 #define OV5640_REG_TIMING_TC_REG20      0x3820
  69 #define OV5640_REG_TIMING_TC_REG21      0x3821
  70 #define OV5640_REG_AEC_CTRL00           0x3a00
  71 #define OV5640_REG_AEC_B50_STEP         0x3a08
  72 #define OV5640_REG_AEC_B60_STEP         0x3a0a
  73 #define OV5640_REG_AEC_CTRL0D           0x3a0d
  74 #define OV5640_REG_AEC_CTRL0E           0x3a0e
  75 #define OV5640_REG_AEC_CTRL0F           0x3a0f
  76 #define OV5640_REG_AEC_CTRL10           0x3a10
  77 #define OV5640_REG_AEC_CTRL11           0x3a11
  78 #define OV5640_REG_AEC_CTRL1B           0x3a1b
  79 #define OV5640_REG_AEC_CTRL1E           0x3a1e
  80 #define OV5640_REG_AEC_CTRL1F           0x3a1f
  81 #define OV5640_REG_HZ5060_CTRL00        0x3c00
  82 #define OV5640_REG_HZ5060_CTRL01        0x3c01
  83 #define OV5640_REG_SIGMADELTA_CTRL0C    0x3c0c
  84 #define OV5640_REG_FRAME_CTRL01         0x4202
  85 #define OV5640_REG_FORMAT_CONTROL00     0x4300
  86 #define OV5640_REG_POLARITY_CTRL00      0x4740
  87 #define OV5640_REG_MIPI_CTRL00          0x4800
  88 #define OV5640_REG_DEBUG_MODE           0x4814
  89 #define OV5640_REG_ISP_FORMAT_MUX_CTRL  0x501f
  90 #define OV5640_REG_PRE_ISP_TEST_SET1    0x503d
  91 #define OV5640_REG_SDE_CTRL0            0x5580
  92 #define OV5640_REG_SDE_CTRL1            0x5581
  93 #define OV5640_REG_SDE_CTRL3            0x5583
  94 #define OV5640_REG_SDE_CTRL4            0x5584
  95 #define OV5640_REG_SDE_CTRL5            0x5585
  96 #define OV5640_REG_AVG_READOUT          0x56a1
  97
  98 enum ov5640_mode_id {
  99         OV5640_MODE_QCIF_176_144 = 0,
 100         OV5640_MODE_QVGA_320_240,
 101         OV5640_MODE_VGA_640_480,
 102         OV5640_MODE_NTSC_720_480,
 103         OV5640_MODE_PAL_720_576,
 104         OV5640_MODE_XGA_1024_768,
 105         OV5640_MODE_720P_1280_720,
 106         OV5640_MODE_1080P_1920_1080,
 107         OV5640_MODE_QSXGA_2592_1944,
 108         OV5640_NUM_MODES,
 109 };
 110
 111 enum ov5640_frame_rate {
 112         OV5640_15_FPS = 0,
 113         OV5640_30_FPS,
 114         OV5640_60_FPS,
 115         OV5640_NUM_FRAMERATES,
 116 };
 117
 118 enum ov5640_format_mux {
 119         OV5640_FMT_MUX_YUV422 = 0,
 120         OV5640_FMT_MUX_RGB,
 121         OV5640_FMT_MUX_DITHER,
 122         OV5640_FMT_MUX_RAW_DPC,
 123         OV5640_FMT_MUX_SNR_RAW,
 124         OV5640_FMT_MUX_RAW_CIP,
 125 };
 126
 127 struct ov5640_pixfmt {
 128         u32 code;
 129         u32 colorspace;
 130 };
 131
 132 static const struct ov5640_pixfmt ov5640_formats[] = {
 133         { MEDIA_BUS_FMT_JPEG_1X8, V4L2_COLORSPACE_JPEG, },
 134         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_COLORSPACE_SRGB, },
 135         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_SRGB, },
 136         { MEDIA_BUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB, },
 137         { MEDIA_BUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB, },
 138         { MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB, },
 139         { MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_COLORSPACE_SRGB, },
 140         { MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_COLORSPACE_SRGB, },
 141         { MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_COLORSPACE_SRGB, },
 142 };
 143
 144 /*
 145  * FIXME: remove this when a subdev API becomes available
 146  * to set the MIPI CSI-2 virtual channel.
 147  */
 148 static unsigned int virtual_channel;
 149 module_param(virtual_channel, uint, 0444);
 150 MODULE_PARM_DESC(virtual_channel,
 151                  "MIPI CSI-2 virtual channel (0..3), default 0");
 152
 153 static const int ov5640_framerates[] = {
 154         [OV5640_15_FPS] = 15,
 155         [OV5640_30_FPS] = 30,
 156         [OV5640_60_FPS] = 60,
 157 };
 158
 159 /* regulator supplies */
 160 static const char * const ov5640_supply_name[] = {
 161         "DOVDD", /* Digital I/O (1.8V) supply */
 162         "DVDD",  /* Digital Core (1.5V) supply */
 163         "AVDD",  /* Analog (2.8V) supply */
 164 };
 165
 166 #define OV5640_NUM_SUPPLIES ARRAY_SIZE(ov5640_supply_name)
 167
 168 /*
 169  * Image size under 1280 * 960 are SUBSAMPLING
 170  * Image size upper 1280 * 960 are SCALING
 171  */
 172 enum ov5640_downsize_mode {
 173         SUBSAMPLING,
 174         SCALING,
 175 };
 176
 177 struct reg_value {
 178         u16 reg_addr;
 179         u8 val;
 180         u8 mask;
 181         u32 delay_ms;
 182 };
 183
 184 struct ov5640_mode_info {
 185         enum ov5640_mode_id id;
 186         enum ov5640_downsize_mode dn_mode;
 187         u32 hact;
 188         u32 htot;
 189         u32 vact;
 190         u32 vtot;
 191         const struct reg_value *reg_data;
 192         u32 reg_data_size;
 193 };
 194
 195 struct ov5640_ctrls {
 196         struct v4l2_ctrl_handler handler;
 197         struct {
 198                 struct v4l2_ctrl *auto_exp;
 199                 struct v4l2_ctrl *exposure;
 200         };
 201         struct {
 202                 struct v4l2_ctrl *auto_wb;
 203                 struct v4l2_ctrl *blue_balance;
 204                 struct v4l2_ctrl *red_balance;
 205         };
 206         struct {
 207                 struct v4l2_ctrl *auto_gain;
 208                 struct v4l2_ctrl *gain;
 209         };
 210         struct v4l2_ctrl *brightness;
 211         struct v4l2_ctrl *light_freq;
 212         struct v4l2_ctrl *saturation;
 213         struct v4l2_ctrl *contrast;
 214         struct v4l2_ctrl *hue;
 215         struct v4l2_ctrl *test_pattern;
 216         struct v4l2_ctrl *hflip;
 217         struct v4l2_ctrl *vflip;
 218 };
 219
 220 struct ov5640_dev {
 221         struct i2c_client *i2c_client;
 222         struct v4l2_subdev sd;
 223         struct media_pad pad;
 224         struct v4l2_fwnode_endpoint ep; /* the parsed DT endpoint info */
 225         struct clk *xclk; /* system clock to OV5640 */
 226         u32 xclk_freq;
 227
 228         struct regulator_bulk_data supplies[OV5640_NUM_SUPPLIES];
 229         struct gpio_desc *reset_gpio;
 230         struct gpio_desc *pwdn_gpio;
 231         bool   upside_down;
 232
 233         /* lock to protect all members below */
 234         struct mutex lock;
 235
 236         int power_count;
 237
 238         struct v4l2_mbus_framefmt fmt;
 239         bool pending_fmt_change;
 240
 241         const struct ov5640_mode_info *current_mode;
 242         const struct ov5640_mode_info *last_mode;
 243         enum ov5640_frame_rate current_fr;
 244         struct v4l2_fract frame_interval;
 245
 246         struct ov5640_ctrls ctrls;
 247
 248         u32 prev_sysclk, prev_hts;
 249         u32 ae_low, ae_high, ae_target;
 250
 251         bool pending_mode_change;
 252         bool streaming;
 253 };
 254
 255 static inline struct ov5640_dev *to_ov5640_dev(struct v4l2_subdev *sd)
 256 {
 257         return container_of(sd, struct ov5640_dev, sd);
 258 }
 259
 260 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
 261 {
 262         return &container_of(ctrl->handler, struct ov5640_dev,
 263                              ctrls.handler)->sd;
 264 }
 265
 266 /*
 267  * FIXME: all of these register tables are likely filled with
 268  * entries that set the register to their power-on default values,
 269  * and which are otherwise not touched by this driver. Those entries
 270  * should be identified and removed to speed register load time
 271  * over i2c.
 272  */
 273 /* YUV422 UYVY VGA@30fps */
 274 static const struct reg_value ov5640_init_setting_30fps_VGA[] = {
 275         {0x3103, 0x11, 0, 0}, {0x3008, 0x82, 0, 5}, {0x3008, 0x42, 0, 0},
 276         {0x3103, 0x03, 0, 0}, {0x3017, 0x00, 0, 0}, {0x3018, 0x00, 0, 0},
 277         {0x3630, 0x36, 0, 0},
 278         {0x3631, 0x0e, 0, 0}, {0x3632, 0xe2, 0, 0}, {0x3633, 0x12, 0, 0},
 279         {0x3621, 0xe0, 0, 0}, {0x3704, 0xa0, 0, 0}, {0x3703, 0x5a, 0, 0},
 280         {0x3715, 0x78, 0, 0}, {0x3717, 0x01, 0, 0}, {0x370b, 0x60, 0, 0},
 281         {0x3705, 0x1a, 0, 0}, {0x3905, 0x02, 0, 0}, {0x3906, 0x10, 0, 0},
 282         {0x3901, 0x0a, 0, 0}, {0x3731, 0x12, 0, 0}, {0x3600, 0x08, 0, 0},
 283         {0x3601, 0x33, 0, 0}, {0x302d, 0x60, 0, 0}, {0x3620, 0x52, 0, 0},
 284         {0x371b, 0x20, 0, 0}, {0x471c, 0x50, 0, 0}, {0x3a13, 0x43, 0, 0},
 285         {0x3a18, 0x00, 0, 0}, {0x3a19, 0xf8, 0, 0}, {0x3635, 0x13, 0, 0},
 286         {0x3636, 0x03, 0, 0}, {0x3634, 0x40, 0, 0}, {0x3622, 0x01, 0, 0},
 287         {0x3c01, 0xa4, 0, 0}, {0x3c04, 0x28, 0, 0}, {0x3c05, 0x98, 0, 0},
 288         {0x3c06, 0x00, 0, 0}, {0x3c07, 0x08, 0, 0}, {0x3c08, 0x00, 0, 0},
 289         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 290         {0x3820, 0x41, 0, 0}, {0x3821, 0x07, 0, 0}, {0x3814, 0x31, 0, 0},
 291         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 292         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 293         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 294         {0x3810, 0x00, 0, 0},
 295         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 296         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 297         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 298         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 299         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 300         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 301         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0}, {0x3000, 0x00, 0, 0},
 302         {0x3002, 0x1c, 0, 0}, {0x3004, 0xff, 0, 0}, {0x3006, 0xc3, 0, 0},
 303         {0x302e, 0x08, 0, 0}, {0x4300, 0x3f, 0, 0},
 304         {0x501f, 0x00, 0, 0}, {0x4713, 0x03, 0, 0}, {0x4407, 0x04, 0, 0},
 305         {0x440e, 0x00, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 306         {0x4837, 0x0a, 0, 0}, {0x3824, 0x02, 0, 0},
 307         {0x5000, 0xa7, 0, 0}, {0x5001, 0xa3, 0, 0}, {0x5180, 0xff, 0, 0},
 308         {0x5181, 0xf2, 0, 0}, {0x5182, 0x00, 0, 0}, {0x5183, 0x14, 0, 0},
 309         {0x5184, 0x25, 0, 0}, {0x5185, 0x24, 0, 0}, {0x5186, 0x09, 0, 0},
 310         {0x5187, 0x09, 0, 0}, {0x5188, 0x09, 0, 0}, {0x5189, 0x88, 0, 0},
 311         {0x518a, 0x54, 0, 0}, {0x518b, 0xee, 0, 0}, {0x518c, 0xb2, 0, 0},
 312         {0x518d, 0x50, 0, 0}, {0x518e, 0x34, 0, 0}, {0x518f, 0x6b, 0, 0},
 313         {0x5190, 0x46, 0, 0}, {0x5191, 0xf8, 0, 0}, {0x5192, 0x04, 0, 0},
 314         {0x5193, 0x70, 0, 0}, {0x5194, 0xf0, 0, 0}, {0x5195, 0xf0, 0, 0},
 315         {0x5196, 0x03, 0, 0}, {0x5197, 0x01, 0, 0}, {0x5198, 0x04, 0, 0},
 316         {0x5199, 0x6c, 0, 0}, {0x519a, 0x04, 0, 0}, {0x519b, 0x00, 0, 0},
 317         {0x519c, 0x09, 0, 0}, {0x519d, 0x2b, 0, 0}, {0x519e, 0x38, 0, 0},
 318         {0x5381, 0x1e, 0, 0}, {0x5382, 0x5b, 0, 0}, {0x5383, 0x08, 0, 0},
 319         {0x5384, 0x0a, 0, 0}, {0x5385, 0x7e, 0, 0}, {0x5386, 0x88, 0, 0},
 320         {0x5387, 0x7c, 0, 0}, {0x5388, 0x6c, 0, 0}, {0x5389, 0x10, 0, 0},
 321         {0x538a, 0x01, 0, 0}, {0x538b, 0x98, 0, 0}, {0x5300, 0x08, 0, 0},
 322         {0x5301, 0x30, 0, 0}, {0x5302, 0x10, 0, 0}, {0x5303, 0x00, 0, 0},
 323         {0x5304, 0x08, 0, 0}, {0x5305, 0x30, 0, 0}, {0x5306, 0x08, 0, 0},
 324         {0x5307, 0x16, 0, 0}, {0x5309, 0x08, 0, 0}, {0x530a, 0x30, 0, 0},
 325         {0x530b, 0x04, 0, 0}, {0x530c, 0x06, 0, 0}, {0x5480, 0x01, 0, 0},
 326         {0x5481, 0x08, 0, 0}, {0x5482, 0x14, 0, 0}, {0x5483, 0x28, 0, 0},
 327         {0x5484, 0x51, 0, 0}, {0x5485, 0x65, 0, 0}, {0x5486, 0x71, 0, 0},
 328         {0x5487, 0x7d, 0, 0}, {0x5488, 0x87, 0, 0}, {0x5489, 0x91, 0, 0},
 329         {0x548a, 0x9a, 0, 0}, {0x548b, 0xaa, 0, 0}, {0x548c, 0xb8, 0, 0},
 330         {0x548d, 0xcd, 0, 0}, {0x548e, 0xdd, 0, 0}, {0x548f, 0xea, 0, 0},
 331         {0x5490, 0x1d, 0, 0}, {0x5580, 0x02, 0, 0}, {0x5583, 0x40, 0, 0},
 332         {0x5584, 0x10, 0, 0}, {0x5589, 0x10, 0, 0}, {0x558a, 0x00, 0, 0},
 333         {0x558b, 0xf8, 0, 0}, {0x5800, 0x23, 0, 0}, {0x5801, 0x14, 0, 0},
 334         {0x5802, 0x0f, 0, 0}, {0x5803, 0x0f, 0, 0}, {0x5804, 0x12, 0, 0},
 335         {0x5805, 0x26, 0, 0}, {0x5806, 0x0c, 0, 0}, {0x5807, 0x08, 0, 0},
 336         {0x5808, 0x05, 0, 0}, {0x5809, 0x05, 0, 0}, {0x580a, 0x08, 0, 0},
 337         {0x580b, 0x0d, 0, 0}, {0x580c, 0x08, 0, 0}, {0x580d, 0x03, 0, 0},
 338         {0x580e, 0x00, 0, 0}, {0x580f, 0x00, 0, 0}, {0x5810, 0x03, 0, 0},
 339         {0x5811, 0x09, 0, 0}, {0x5812, 0x07, 0, 0}, {0x5813, 0x03, 0, 0},
 340         {0x5814, 0x00, 0, 0}, {0x5815, 0x01, 0, 0}, {0x5816, 0x03, 0, 0},
 341         {0x5817, 0x08, 0, 0}, {0x5818, 0x0d, 0, 0}, {0x5819, 0x08, 0, 0},
 342         {0x581a, 0x05, 0, 0}, {0x581b, 0x06, 0, 0}, {0x581c, 0x08, 0, 0},
 343         {0x581d, 0x0e, 0, 0}, {0x581e, 0x29, 0, 0}, {0x581f, 0x17, 0, 0},
 344         {0x5820, 0x11, 0, 0}, {0x5821, 0x11, 0, 0}, {0x5822, 0x15, 0, 0},
 345         {0x5823, 0x28, 0, 0}, {0x5824, 0x46, 0, 0}, {0x5825, 0x26, 0, 0},
 346         {0x5826, 0x08, 0, 0}, {0x5827, 0x26, 0, 0}, {0x5828, 0x64, 0, 0},
 347         {0x5829, 0x26, 0, 0}, {0x582a, 0x24, 0, 0}, {0x582b, 0x22, 0, 0},
 348         {0x582c, 0x24, 0, 0}, {0x582d, 0x24, 0, 0}, {0x582e, 0x06, 0, 0},
 349         {0x582f, 0x22, 0, 0}, {0x5830, 0x40, 0, 0}, {0x5831, 0x42, 0, 0},
 350         {0x5832, 0x24, 0, 0}, {0x5833, 0x26, 0, 0}, {0x5834, 0x24, 0, 0},
 351         {0x5835, 0x22, 0, 0}, {0x5836, 0x22, 0, 0}, {0x5837, 0x26, 0, 0},
 352         {0x5838, 0x44, 0, 0}, {0x5839, 0x24, 0, 0}, {0x583a, 0x26, 0, 0},
 353         {0x583b, 0x28, 0, 0}, {0x583c, 0x42, 0, 0}, {0x583d, 0xce, 0, 0},
 354         {0x5025, 0x00, 0, 0}, {0x3a0f, 0x30, 0, 0}, {0x3a10, 0x28, 0, 0},
 355         {0x3a1b, 0x30, 0, 0}, {0x3a1e, 0x26, 0, 0}, {0x3a11, 0x60, 0, 0},
 356         {0x3a1f, 0x14, 0, 0}, {0x3008, 0x02, 0, 0}, {0x3c00, 0x04, 0, 300},
 357 };
 358
 359 static const struct reg_value ov5640_setting_VGA_640_480[] = {
 360         {0x3c07, 0x08, 0, 0},
 361         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 362         {0x3814, 0x31, 0, 0},
 363         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 364         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 365         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 366         {0x3810, 0x00, 0, 0},
 367         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 368         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 369         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 370         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 371         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 372         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 373         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0}, {0x4713, 0x03, 0, 0},
 374         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 375         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 376 };
 377
 378 static const struct reg_value ov5640_setting_XGA_1024_768[] = {
 379         {0x3c07, 0x08, 0, 0},
 380         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 381         {0x3814, 0x31, 0, 0},
 382         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 383         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 384         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 385         {0x3810, 0x00, 0, 0},
 386         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 387         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 388         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 389         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 390         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 391         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 392         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0}, {0x4713, 0x03, 0, 0},
 393         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 394         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 395 };
 396
 397 static const struct reg_value ov5640_setting_QVGA_320_240[] = {
 398         {0x3c07, 0x08, 0, 0},
 399         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 400         {0x3814, 0x31, 0, 0},
 401         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 402         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 403         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 404         {0x3810, 0x00, 0, 0},
 405         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 406         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 407         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 408         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 409         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 410         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 411         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0}, {0x4713, 0x03, 0, 0},
 412         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 413         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 414 };
 415
 416 static const struct reg_value ov5640_setting_QCIF_176_144[] = {
 417         {0x3c07, 0x08, 0, 0},
 418         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 419         {0x3814, 0x31, 0, 0},
 420         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 421         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 422         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 423         {0x3810, 0x00, 0, 0},
 424         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 425         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 426         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 427         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 428         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 429         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 430         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0}, {0x4713, 0x03, 0, 0},
 431         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 432         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 433 };
 434
 435 static const struct reg_value ov5640_setting_NTSC_720_480[] = {
 436         {0x3c07, 0x08, 0, 0},
 437         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 438         {0x3814, 0x31, 0, 0},
 439         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 440         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 441         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 442         {0x3810, 0x00, 0, 0},
 443         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x3c, 0, 0},
 444         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 445         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 446         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 447         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 448         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 449         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0}, {0x4713, 0x03, 0, 0},
 450         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 451         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 452 };
 453
 454 static const struct reg_value ov5640_setting_PAL_720_576[] = {
 455         {0x3c07, 0x08, 0, 0},
 456         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 457         {0x3814, 0x31, 0, 0},
 458         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 459         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 460         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 461         {0x3810, 0x00, 0, 0},
 462         {0x3811, 0x38, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 463         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 464         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 465         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 466         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 467         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 468         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0}, {0x4713, 0x03, 0, 0},
 469         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 470         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 471 };
 472
 473 static const struct reg_value ov5640_setting_720P_1280_720[] = {
 474         {0x3c07, 0x07, 0, 0},
 475         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 476         {0x3814, 0x31, 0, 0},
 477         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 478         {0x3802, 0x00, 0, 0}, {0x3803, 0xfa, 0, 0}, {0x3804, 0x0a, 0, 0},
 479         {0x3805, 0x3f, 0, 0}, {0x3806, 0x06, 0, 0}, {0x3807, 0xa9, 0, 0},
 480         {0x3810, 0x00, 0, 0},
 481         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x04, 0, 0},
 482         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 483         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x02, 0, 0},
 484         {0x3a03, 0xe4, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0xbc, 0, 0},
 485         {0x3a0a, 0x01, 0, 0}, {0x3a0b, 0x72, 0, 0}, {0x3a0e, 0x01, 0, 0},
 486         {0x3a0d, 0x02, 0, 0}, {0x3a14, 0x02, 0, 0}, {0x3a15, 0xe4, 0, 0},
 487         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0}, {0x4713, 0x03, 0, 0},
 488         {0x4407, 0x04, 0, 0}, {0x460b, 0x37, 0, 0}, {0x460c, 0x20, 0, 0},
 489         {0x3824, 0x04, 0, 0}, {0x5001, 0x83, 0, 0},
 490 };
 491
 492 static const struct reg_value ov5640_setting_1080P_1920_1080[] = {
 493         {0x3008, 0x42, 0, 0},
 494         {0x3c07, 0x08, 0, 0},
 495         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 496         {0x3814, 0x11, 0, 0},
 497         {0x3815, 0x11, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 498         {0x3802, 0x00, 0, 0}, {0x3803, 0x00, 0, 0}, {0x3804, 0x0a, 0, 0},
 499         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9f, 0, 0},
 500         {0x3810, 0x00, 0, 0},
 501         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x04, 0, 0},
 502         {0x3618, 0x04, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x21, 0, 0},
 503         {0x3709, 0x12, 0, 0}, {0x370c, 0x00, 0, 0}, {0x3a02, 0x03, 0, 0},
 504         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 505         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 506         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 507         {0x4001, 0x02, 0, 0}, {0x4004, 0x06, 0, 0}, {0x4713, 0x03, 0, 0},
 508         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 509         {0x3824, 0x02, 0, 0}, {0x5001, 0x83, 0, 0},
 510         {0x3c07, 0x07, 0, 0}, {0x3c08, 0x00, 0, 0},
 511         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 512         {0x3800, 0x01, 0, 0}, {0x3801, 0x50, 0, 0}, {0x3802, 0x01, 0, 0},
 513         {0x3803, 0xb2, 0, 0}, {0x3804, 0x08, 0, 0}, {0x3805, 0xef, 0, 0},
 514         {0x3806, 0x05, 0, 0}, {0x3807, 0xf1, 0, 0},
 515         {0x3612, 0x2b, 0, 0}, {0x3708, 0x64, 0, 0},
 516         {0x3a02, 0x04, 0, 0}, {0x3a03, 0x60, 0, 0}, {0x3a08, 0x01, 0, 0},
 517         {0x3a09, 0x50, 0, 0}, {0x3a0a, 0x01, 0, 0}, {0x3a0b, 0x18, 0, 0},
 518         {0x3a0e, 0x03, 0, 0}, {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x04, 0, 0},
 519         {0x3a15, 0x60, 0, 0}, {0x4713, 0x02, 0, 0}, {0x4407, 0x04, 0, 0},
 520         {0x460b, 0x37, 0, 0}, {0x460c, 0x20, 0, 0}, {0x3824, 0x04, 0, 0},
 521         {0x4005, 0x1a, 0, 0}, {0x3008, 0x02, 0, 0},
 522 };
 523
 524 static const struct reg_value ov5640_setting_QSXGA_2592_1944[] = {
 525         {0x3c07, 0x08, 0, 0},
 526         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 527         {0x3814, 0x11, 0, 0},
 528         {0x3815, 0x11, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 529         {0x3802, 0x00, 0, 0}, {0x3803, 0x00, 0, 0}, {0x3804, 0x0a, 0, 0},
 530         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9f, 0, 0},
 531         {0x3810, 0x00, 0, 0},
 532         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x04, 0, 0},
 533         {0x3618, 0x04, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x21, 0, 0},
 534         {0x3709, 0x12, 0, 0}, {0x370c, 0x00, 0, 0}, {0x3a02, 0x03, 0, 0},
 535         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 536         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 537         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 538         {0x4001, 0x02, 0, 0}, {0x4004, 0x06, 0, 0}, {0x4713, 0x03, 0, 0},
 539         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 540         {0x3824, 0x02, 0, 0}, {0x5001, 0x83, 0, 70},
 541 };
 542
 543 /* power-on sensor init reg table */
 544 static const struct ov5640_mode_info ov5640_mode_init_data = {
 545         0, SUBSAMPLING, 640, 1896, 480, 984,
 546         ov5640_init_setting_30fps_VGA,
 547         ARRAY_SIZE(ov5640_init_setting_30fps_VGA),
 548 };
 549
 550 static const struct ov5640_mode_info
 551 ov5640_mode_data[OV5640_NUM_MODES] = {
 552         {OV5640_MODE_QCIF_176_144, SUBSAMPLING,
 553          176, 1896, 144, 984,
 554          ov5640_setting_QCIF_176_144,
 555          ARRAY_SIZE(ov5640_setting_QCIF_176_144)},
 556         {OV5640_MODE_QVGA_320_240, SUBSAMPLING,
 557          320, 1896, 240, 984,
 558          ov5640_setting_QVGA_320_240,
 559          ARRAY_SIZE(ov5640_setting_QVGA_320_240)},
 560         {OV5640_MODE_VGA_640_480, SUBSAMPLING,
 561          640, 1896, 480, 1080,
 562          ov5640_setting_VGA_640_480,
 563          ARRAY_SIZE(ov5640_setting_VGA_640_480)},
 564         {OV5640_MODE_NTSC_720_480, SUBSAMPLING,
 565          720, 1896, 480, 984,
 566          ov5640_setting_NTSC_720_480,
 567          ARRAY_SIZE(ov5640_setting_NTSC_720_480)},
 568         {OV5640_MODE_PAL_720_576, SUBSAMPLING,
 569          720, 1896, 576, 984,
 570          ov5640_setting_PAL_720_576,
 571          ARRAY_SIZE(ov5640_setting_PAL_720_576)},
 572         {OV5640_MODE_XGA_1024_768, SUBSAMPLING,
 573          1024, 1896, 768, 1080,
 574          ov5640_setting_XGA_1024_768,
 575          ARRAY_SIZE(ov5640_setting_XGA_1024_768)},
 576         {OV5640_MODE_720P_1280_720, SUBSAMPLING,
 577          1280, 1892, 720, 740,
 578          ov5640_setting_720P_1280_720,
 579          ARRAY_SIZE(ov5640_setting_720P_1280_720)},
 580         {OV5640_MODE_1080P_1920_1080, SCALING,
 581          1920, 2500, 1080, 1120,
 582          ov5640_setting_1080P_1920_1080,
 583          ARRAY_SIZE(ov5640_setting_1080P_1920_1080)},
 584         {OV5640_MODE_QSXGA_2592_1944, SCALING,
 585          2592, 2844, 1944, 1968,
 586          ov5640_setting_QSXGA_2592_1944,
 587          ARRAY_SIZE(ov5640_setting_QSXGA_2592_1944)},
 588 };
 589
 590 static int ov5640_init_slave_id(struct ov5640_dev *sensor)
 591 {
 592         struct i2c_client *client = sensor->i2c_client;
 593         struct i2c_msg msg;
 594         u8 buf[3];
 595         int ret;
 596
 597         if (client->addr == OV5640_DEFAULT_SLAVE_ID)
 598                 return 0;
 599
 600         buf[0] = OV5640_REG_SLAVE_ID >> 8;
 601         buf[1] = OV5640_REG_SLAVE_ID & 0xff;
 602         buf[2] = client->addr << 1;
 603
 604         msg.addr = OV5640_DEFAULT_SLAVE_ID;
 605         msg.flags = 0;
 606         msg.buf = buf;
 607         msg.len = sizeof(buf);
 608
 609         ret = i2c_transfer(client->adapter, &msg, 1);
 610         if (ret < 0) {
 611                 dev_err(&client->dev, "%s: failed with %d\n", __func__, ret);
 612                 return ret;
 613         }
 614
 615         return 0;
 616 }
 617
 618 static int ov5640_write_reg(struct ov5640_dev *sensor, u16 reg, u8 val)
 619 {
 620         struct i2c_client *client = sensor->i2c_client;
 621         struct i2c_msg msg;
 622         u8 buf[3];
 623         int ret;
 624
 625         buf[0] = reg >> 8;
 626         buf[1] = reg & 0xff;
 627         buf[2] = val;
 628
 629         msg.addr = client->addr;
 630         msg.flags = client->flags;
 631         msg.buf = buf;
 632         msg.len = sizeof(buf);
 633
 634         ret = i2c_transfer(client->adapter, &msg, 1);
 635         if (ret < 0) {
 636                 dev_err(&client->dev, "%s: error: reg=%x, val=%x\n",
 637                         __func__, reg, val);
 638                 return ret;
 639         }
 640
 641         return 0;
 642 }
 643
 644 static int ov5640_read_reg(struct ov5640_dev *sensor, u16 reg, u8 *val)
 645 {
 646         struct i2c_client *client = sensor->i2c_client;
 647         struct i2c_msg msg[2];
 648         u8 buf[2];
 649         int ret;
 650
 651         buf[0] = reg >> 8;
 652         buf[1] = reg & 0xff;
 653
 654         msg[0].addr = client->addr;
 655         msg[0].flags = client->flags;
 656         msg[0].buf = buf;
 657         msg[0].len = sizeof(buf);
 658
 659         msg[1].addr = client->addr;
 660         msg[1].flags = client->flags | I2C_M_RD;
 661         msg[1].buf = buf;
 662         msg[1].len = 1;
 663
 664         ret = i2c_transfer(client->adapter, msg, 2);
 665         if (ret < 0) {
 666                 dev_err(&client->dev, "%s: error: reg=%x\n",
 667                         __func__, reg);
 668                 return ret;
 669         }
 670
 671         *val = buf[0];
 672         return 0;
 673 }
 674
 675 static int ov5640_read_reg16(struct ov5640_dev *sensor, u16 reg, u16 *val)
 676 {
 677         u8 hi, lo;
 678         int ret;
 679
 680         ret = ov5640_read_reg(sensor, reg, &hi);
 681         if (ret)
 682                 return ret;
 683         ret = ov5640_read_reg(sensor, reg + 1, &lo);
 684         if (ret)
 685                 return ret;
 686
 687         *val = ((u16)hi << 8) | (u16)lo;
 688         return 0;
 689 }
 690
 691 static int ov5640_write_reg16(struct ov5640_dev *sensor, u16 reg, u16 val)
 692 {
 693         int ret;
 694
 695         ret = ov5640_write_reg(sensor, reg, val >> 8);
 696         if (ret)
 697                 return ret;
 698
 699         return ov5640_write_reg(sensor, reg + 1, val & 0xff);
 700 }
 701
 702 static int ov5640_mod_reg(struct ov5640_dev *sensor, u16 reg,
 703                           u8 mask, u8 val)
 704 {
 705         u8 readval;
 706         int ret;
 707
 708         ret = ov5640_read_reg(sensor, reg, &readval);
 709         if (ret)
 710                 return ret;
 711
 712         readval &= ~mask;
 713         val &= mask;
 714         val |= readval;
 715
 716         return ov5640_write_reg(sensor, reg, val);
 717 }
 718
 719 /*
 720  * After trying the various combinations, reading various
 721  * documentations spreaded around the net, and from the various
 722  * feedback, the clock tree is probably as follows:
 723  *
 724  *   +--------------+
 725  *   |  Ext. Clock  |
 726  *   +-+------------+
 727  *     |  +----------+
 728  *     +->|   PLL1   | - reg 0x3036, for the multiplier
 729  *        +-+--------+ - reg 0x3037, bits 0-3 for the pre-divider
 730  *          |  +--------------+
 731  *          +->| System Clock |  - reg 0x3035, bits 4-7
 732  *             +-+------------+
 733  *               |  +--------------+
 734  *               +->| MIPI Divider | - reg 0x3035, bits 0-3
 735  *               |  +-+------------+
 736  *               |    +----------------> MIPI SCLK
 737  *               |    +  +-----+
 738  *               |    +->| / 2 |-------> MIPI BIT CLK
 739  *               |       +-----+
 740  *               |  +--------------+
 741  *               +->| PLL Root Div | - reg 0x3037, bit 4
 742  *                  +-+------------+
 743  *                    |  +---------+
 744  *                    +->| Bit Div | - reg 0x3035, bits 0-3
 745  *                       +-+-------+
 746  *                         |  +-------------+
 747  *                         +->| SCLK Div    | - reg 0x3108, bits 0-1
 748  *                         |  +-+-----------+
 749  *                         |    +---------------> SCLK
 750  *                         |  +-------------+
 751  *                         +->| SCLK 2X Div | - reg 0x3108, bits 2-3
 752  *                         |  +-+-----------+
 753  *                         |    +---------------> SCLK 2X
 754  *                         |  +-------------+
 755  *                         +->| PCLK Div    | - reg 0x3108, bits 4-5
 756  *                            ++------------+
 757  *                             +  +-----------+
 758  *                             +->|   P_DIV   | - reg 0x3035, bits 0-3
 759  *                                +-----+-----+
 760  *                                       +------------> PCLK
 761  *
 762  * This is deviating from the datasheet at least for the register
 763  * 0x3108, since it's said here that the PCLK would be clocked from
 764  * the PLL.
 765  *
 766  * There seems to be also (unverified) constraints:
 767  *  - the PLL pre-divider output rate should be in the 4-27MHz range
 768  *  - the PLL multiplier output rate should be in the 500-1000MHz range
 769  *  - PCLK >= SCLK * 2 in YUV, >= SCLK in Raw or JPEG
 770  *
 771  * In the two latter cases, these constraints are met since our
 772  * factors are hardcoded. If we were to change that, we would need to
 773  * take this into account. The only varying parts are the PLL
 774  * multiplier and the system clock divider, which are shared between
 775  * all these clocks so won't cause any issue.
 776  */
 777
 778 /*
 779  * This is supposed to be ranging from 1 to 8, but the value is always
 780  * set to 3 in the vendor kernels.
 781  */
 782 #define OV5640_PLL_PREDIV       3
 783
 784 #define OV5640_PLL_MULT_MIN     4
 785 #define OV5640_PLL_MULT_MAX     252
 786
 787 /*
 788  * This is supposed to be ranging from 1 to 16, but the value is
 789  * always set to either 1 or 2 in the vendor kernels.
 790  */
 791 #define OV5640_SYSDIV_MIN       1
 792 #define OV5640_SYSDIV_MAX       16
 793
 794 /*
 795  * Hardcode these values for scaler and non-scaler modes.
 796  * FIXME: to be re-calcualted for 1 data lanes setups
 797  */
 798 #define OV5640_MIPI_DIV_PCLK    2
 799 #define OV5640_MIPI_DIV_SCLK    1
 800
 801 /*
 802  * This is supposed to be ranging from 1 to 2, but the value is always
 803  * set to 2 in the vendor kernels.
 804  */
 805 #define OV5640_PLL_ROOT_DIV                     2
 806 #define OV5640_PLL_CTRL3_PLL_ROOT_DIV_2         BIT(4)
 807
 808 /*
 809  * We only supports 8-bit formats at the moment
 810  */
 811 #define OV5640_BIT_DIV                          2
 812 #define OV5640_PLL_CTRL0_MIPI_MODE_8BIT         0x08
 813
 814 /*
 815  * This is supposed to be ranging from 1 to 8, but the value is always
 816  * set to 2 in the vendor kernels.
 817  */
 818 #define OV5640_SCLK_ROOT_DIV    2
 819
 820 /*
 821  * This is hardcoded so that the consistency is maintained between SCLK and
 822  * SCLK 2x.
 823  */
 824 #define OV5640_SCLK2X_ROOT_DIV (OV5640_SCLK_ROOT_DIV / 2)
 825
 826 /*
 827  * This is supposed to be ranging from 1 to 8, but the value is always
 828  * set to 1 in the vendor kernels.
 829  */
 830 #define OV5640_PCLK_ROOT_DIV                    1
 831 #define OV5640_PLL_SYS_ROOT_DIVIDER_BYPASS      0x00
 832
 833 static unsigned long ov5640_compute_sys_clk(struct ov5640_dev *sensor,
 834                                             u8 pll_prediv, u8 pll_mult,
 835                                             u8 sysdiv)
 836 {
 837         unsigned long sysclk = sensor->xclk_freq / pll_prediv * pll_mult;
 838
 839         /* PLL1 output cannot exceed 1GHz. */
 840         if (sysclk / 1000000 > 1000)
 841                 return 0;
 842
 843         return sysclk / sysdiv;
 844 }
 845
 846 static unsigned long ov5640_calc_sys_clk(struct ov5640_dev *sensor,
 847                                          unsigned long rate,
 848                                          u8 *pll_prediv, u8 *pll_mult,
 849                                          u8 *sysdiv)
 850 {
 851         unsigned long best = ~0;
 852         u8 best_sysdiv = 1, best_mult = 1;
 853         u8 _sysdiv, _pll_mult;
 854
 855         for (_sysdiv = OV5640_SYSDIV_MIN;
 856              _sysdiv <= OV5640_SYSDIV_MAX;
 857              _sysdiv++) {
 858                 for (_pll_mult = OV5640_PLL_MULT_MIN;
 859                      _pll_mult <= OV5640_PLL_MULT_MAX;
 860                      _pll_mult++) {
 861                         unsigned long _rate;
 862
 863                         /*
 864                          * The PLL multiplier cannot be odd if above
 865                          * 127.
 866                          */
 867                         if (_pll_mult > 127 && (_pll_mult % 2))
 868                                 continue;
 869
 870                         _rate = ov5640_compute_sys_clk(sensor,
 871                                                        OV5640_PLL_PREDIV,
 872                                                        _pll_mult, _sysdiv);
 873
 874                         /*
 875                          * We have reached the maximum allowed PLL1 output,
 876                          * increase sysdiv.
 877                          */
 878                         if (!rate)
 879                                 break;
 880
 881                         /*
 882                          * Prefer rates above the expected clock rate than
 883                          * below, even if that means being less precise.
 884                          */
 885                         if (_rate < rate)
 886                                 continue;
 887
 888                         if (abs(rate - _rate) < abs(rate - best)) {
 889                                 best = _rate;
 890                                 best_sysdiv = _sysdiv;
 891                                 best_mult = _pll_mult;
 892                         }
 893
 894                         if (_rate == rate)
 895                                 goto out;
 896                 }
 897         }
 898
 899 out:
 900         *sysdiv = best_sysdiv;
 901         *pll_prediv = OV5640_PLL_PREDIV;
 902         *pll_mult = best_mult;
 903
 904         return best;
 905 }
 906
 907 /*
 908  * ov5640_set_mipi_pclk() - Calculate the clock tree configuration values
 909  *                          for the MIPI CSI-2 output.
 910  *
 911  * @rate: The requested bandwidth per lane in bytes per second.
 912  *        'Bandwidth Per Lane' is calculated as:
 913  *        bpl = HTOT * VTOT * FPS * bpp / num_lanes;
 914  *
 915  * This function use the requested bandwidth to calculate:
 916  * - sample_rate = bpl / (bpp / num_lanes);
 917  *               = bpl / (PLL_RDIV * BIT_DIV * PCLK_DIV * MIPI_DIV / num_lanes);
 918  *
 919  * - mipi_sclk   = bpl / MIPI_DIV / 2; ( / 2 is for CSI-2 DDR)
 920  *
 921  * with these fixed parameters:
 922  *      PLL_RDIV        = 2;
 923  *      BIT_DIVIDER     = 2; (MIPI_BIT_MODE == 8 ? 2 : 2,5);
 924  *      PCLK_DIV        = 1;
 925  *
 926  * The MIPI clock generation differs for modes that use the scaler and modes
 927  * that do not. In case the scaler is in use, the MIPI_SCLK generates the MIPI
 928  * BIT CLk, and thus:
 929  *
 930  * - mipi_sclk = bpl / MIPI_DIV / 2;
 931  *   MIPI_DIV = 1;
 932  *
 933  * For modes that do not go through the scaler, the MIPI BIT CLOCK is generated
 934  * from the pixel clock, and thus:
 935  *
 936  * - sample_rate = bpl / (bpp / num_lanes);
 937  *               = bpl / (2 * 2 * 1 * MIPI_DIV / num_lanes);
 938  *               = bpl / (4 * MIPI_DIV / num_lanes);
 939  * - MIPI_DIV    = bpp / (4 * num_lanes);
 940  *
 941  * FIXME: this have been tested with 16bpp and 2 lanes setup only.
 942  * MIPI_DIV is fixed to value 2, but it -might- be changed according to the
 943  * above formula for setups with 1 lane or image formats with different bpp.
 944  *
 945  * FIXME: this deviates from the sensor manual documentation which is quite
 946  * thin on the MIPI clock tree generation part.
 947  */
 948 static int ov5640_set_mipi_pclk(struct ov5640_dev *sensor,
 949                                 unsigned long rate)
 950 {
 951         const struct ov5640_mode_info *mode = sensor->current_mode;
 952         u8 prediv, mult, sysdiv;
 953         u8 mipi_div;
 954         int ret;
 955
 956         /*
 957          * 1280x720 is reported to use 'SUBSAMPLING' only,
 958          * but according to the sensor manual it goes through the
 959          * scaler before subsampling.
 960          */
 961         if (mode->dn_mode == SCALING ||
 962            (mode->id == OV5640_MODE_720P_1280_720))
 963                 mipi_div = OV5640_MIPI_DIV_SCLK;
 964         else
 965                 mipi_div = OV5640_MIPI_DIV_PCLK;
 966
 967         ov5640_calc_sys_clk(sensor, rate, &prediv, &mult, &sysdiv);
 968
 969         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL0,
 970                              0x0f, OV5640_PLL_CTRL0_MIPI_MODE_8BIT);
 971
 972         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL1,
 973                              0xff, sysdiv << 4 | mipi_div);
 974         if (ret)
 975                 return ret;
 976
 977         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL2, 0xff, mult);
 978         if (ret)
 979                 return ret;
 980
 981         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL3,
 982                              0x1f, OV5640_PLL_CTRL3_PLL_ROOT_DIV_2 | prediv);
 983         if (ret)
 984                 return ret;
 985
 986         return ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER,
 987                               0x30, OV5640_PLL_SYS_ROOT_DIVIDER_BYPASS);
 988 }
 989
 990 static unsigned long ov5640_calc_pclk(struct ov5640_dev *sensor,
 991                                       unsigned long rate,
 992                                       u8 *pll_prediv, u8 *pll_mult, u8 *sysdiv,
 993                                       u8 *pll_rdiv, u8 *bit_div, u8 *pclk_div)
 994 {
 995         unsigned long _rate = rate * OV5640_PLL_ROOT_DIV * OV5640_BIT_DIV *
 996                                 OV5640_PCLK_ROOT_DIV;
 997
 998         _rate = ov5640_calc_sys_clk(sensor, _rate, pll_prediv, pll_mult,
 999                                     sysdiv);
1000         *pll_rdiv = OV5640_PLL_ROOT_DIV;
1001         *bit_div = OV5640_BIT_DIV;
1002         *pclk_div = OV5640_PCLK_ROOT_DIV;
1003
1004         return _rate / *pll_rdiv / *bit_div / *pclk_div;
1005 }
1006
1007 static int ov5640_set_dvp_pclk(struct ov5640_dev *sensor, unsigned long rate)
1008 {
1009         u8 prediv, mult, sysdiv, pll_rdiv, bit_div, pclk_div;
1010         int ret;
1011
1012         ov5640_calc_pclk(sensor, rate, &prediv, &mult, &sysdiv, &pll_rdiv,
1013                          &bit_div, &pclk_div);
1014
1015         if (bit_div == 2)
1016                 bit_div = 8;
1017
1018         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL0,
1019                              0x0f, bit_div);
1020         if (ret)
1021                 return ret;
1022
1023         /*
1024          * We need to set sysdiv according to the clock, and to clear
1025          * the MIPI divider.
1026          */
1027         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL1,
1028                              0xff, sysdiv << 4);
1029         if (ret)
1030                 return ret;
1031
1032         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL2,
1033                              0xff, mult);
1034         if (ret)
1035                 return ret;
1036
1037         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL3,
1038                              0x1f, prediv | ((pll_rdiv - 1) << 4));
1039         if (ret)
1040                 return ret;
1041
1042         return ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, 0x30,
1043                               (ilog2(pclk_div) << 4));
1044 }
1045
1046 /* download ov5640 settings to sensor through i2c */
1047 static int ov5640_set_timings(struct ov5640_dev *sensor,
1048                               const struct ov5640_mode_info *mode)
1049 {
1050         int ret;
1051
1052         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_DVPHO, mode->hact);
1053         if (ret < 0)
1054                 return ret;
1055
1056         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_DVPVO, mode->vact);
1057         if (ret < 0)
1058                 return ret;
1059
1060         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_HTS, mode->htot);
1061         if (ret < 0)
1062                 return ret;
1063
1064         return ov5640_write_reg16(sensor, OV5640_REG_TIMING_VTS, mode->vtot);
1065 }
1066
1067 static int ov5640_load_regs(struct ov5640_dev *sensor,
1068                             const struct ov5640_mode_info *mode)
1069 {
1070         const struct reg_value *regs = mode->reg_data;
1071         unsigned int i;
1072         u32 delay_ms;
1073         u16 reg_addr;
1074         u8 mask, val;
1075         int ret = 0;
1076
1077         for (i = 0; i < mode->reg_data_size; ++i, ++regs) {
1078                 delay_ms = regs->delay_ms;
1079                 reg_addr = regs->reg_addr;
1080                 val = regs->val;
1081                 mask = regs->mask;
1082
1083                 if (mask)
1084                         ret = ov5640_mod_reg(sensor, reg_addr, mask, val);
1085                 else
1086                         ret = ov5640_write_reg(sensor, reg_addr, val);
1087                 if (ret)
1088                         break;
1089
1090                 if (delay_ms)
1091                         usleep_range(1000 * delay_ms, 1000 * delay_ms + 100);
1092         }
1093
1094         return ov5640_set_timings(sensor, mode);
1095 }
1096
1097 static int ov5640_set_autoexposure(struct ov5640_dev *sensor, bool on)
1098 {
1099         return ov5640_mod_reg(sensor, OV5640_REG_AEC_PK_MANUAL,
1100                               BIT(0), on ? 0 : BIT(0));
1101 }
1102
1103 /* read exposure, in number of line periods */
1104 static int ov5640_get_exposure(struct ov5640_dev *sensor)
1105 {
1106         int exp, ret;
1107         u8 temp;
1108
1109         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_HI, &temp);
1110         if (ret)
1111                 return ret;
1112         exp = ((int)temp & 0x0f) << 16;
1113         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_MED, &temp);
1114         if (ret)
1115                 return ret;
1116         exp |= ((int)temp << 8);
1117         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_LO, &temp);
1118         if (ret)
1119                 return ret;
1120         exp |= (int)temp;
1121
1122         return exp >> 4;
1123 }
1124
1125 /* write exposure, given number of line periods */
1126 static int ov5640_set_exposure(struct ov5640_dev *sensor, u32 exposure)
1127 {
1128         int ret;
1129
1130         exposure <<= 4;
1131
1132         ret = ov5640_write_reg(sensor,
1133                                OV5640_REG_AEC_PK_EXPOSURE_LO,
1134                                exposure & 0xff);
1135         if (ret)
1136                 return ret;
1137         ret = ov5640_write_reg(sensor,
1138                                OV5640_REG_AEC_PK_EXPOSURE_MED,
1139                                (exposure >> 8) & 0xff);
1140         if (ret)
1141                 return ret;
1142         return ov5640_write_reg(sensor,
1143                                 OV5640_REG_AEC_PK_EXPOSURE_HI,
1144                                 (exposure >> 16) & 0x0f);
1145 }
1146
1147 static int ov5640_get_gain(struct ov5640_dev *sensor)
1148 {
1149         u16 gain;
1150         int ret;
1151
1152         ret = ov5640_read_reg16(sensor, OV5640_REG_AEC_PK_REAL_GAIN, &gain);
1153         if (ret)
1154                 return ret;
1155
1156         return gain & 0x3ff;
1157 }
1158
1159 static int ov5640_set_gain(struct ov5640_dev *sensor, int gain)
1160 {
1161         return ov5640_write_reg16(sensor, OV5640_REG_AEC_PK_REAL_GAIN,
1162                                   (u16)gain & 0x3ff);
1163 }
1164
1165 static int ov5640_set_autogain(struct ov5640_dev *sensor, bool on)
1166 {
1167         return ov5640_mod_reg(sensor, OV5640_REG_AEC_PK_MANUAL,
1168                               BIT(1), on ? 0 : BIT(1));
1169 }
1170
1171 static int ov5640_set_stream_dvp(struct ov5640_dev *sensor, bool on)
1172 {
1173         int ret;
1174         unsigned int flags = sensor->ep.bus.parallel.flags;
1175         u8 pclk_pol = 0;
1176         u8 hsync_pol = 0;
1177         u8 vsync_pol = 0;
1178
1179         /*
1180          * Note about parallel port configuration.
1181          *
1182          * When configured in parallel mode, the OV5640 will
1183          * output 10 bits data on DVP data lines [9:0].
1184          * If only 8 bits data are wanted, the 8 bits data lines
1185          * of the camera interface must be physically connected
1186          * on the DVP data lines [9:2].
1187          *
1188          * Control lines polarity can be configured through
1189          * devicetree endpoint control lines properties.
1190          * If no endpoint control lines properties are set,
1191          * polarity will be as below:
1192          * - VSYNC:     active high
1193          * - HREF:      active low
1194          * - PCLK:      active low
1195          */
1196
1197         if (on) {
1198                 /*
1199                  * configure parallel port control lines polarity
1200                  *
1201                  * POLARITY CTRL0
1202                  * - [5]:       PCLK polarity (0: active low, 1: active high)
1203                  * - [1]:       HREF polarity (0: active low, 1: active high)
1204                  * - [0]:       VSYNC polarity (mismatch here between
1205                  *              datasheet and hardware, 0 is active high
1206                  *              and 1 is active low...)
1207                  */
1208                 if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
1209                         pclk_pol = 1;
1210                 if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
1211                         hsync_pol = 1;
1212                 if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
1213                         vsync_pol = 1;
1214
1215                 ret = ov5640_write_reg(sensor,
1216                                        OV5640_REG_POLARITY_CTRL00,
1217                                        (pclk_pol << 5) |
1218                                        (hsync_pol << 1) |
1219                                        vsync_pol);
1220
1221                 if (ret)
1222                         return ret;
1223         }
1224
1225         /*
1226          * powerdown MIPI TX/RX PHY & disable MIPI
1227          *
1228          * MIPI CONTROL 00
1229          * 4:    PWDN PHY TX
1230          * 3:    PWDN PHY RX
1231          * 2:    MIPI enable
1232          */
1233         ret = ov5640_write_reg(sensor,
1234                                OV5640_REG_IO_MIPI_CTRL00, on ? 0x18 : 0);
1235         if (ret)
1236                 return ret;
1237
1238         /*
1239          * enable VSYNC/HREF/PCLK DVP control lines
1240          * & D[9:6] DVP data lines
1241          *
1242          * PAD OUTPUT ENABLE 01
1243          * - 6:         VSYNC output enable
1244          * - 5:         HREF output enable
1245          * - 4:         PCLK output enable
1246          * - [3:0]:     D[9:6] output enable
1247          */
1248         ret = ov5640_write_reg(sensor,
1249                                OV5640_REG_PAD_OUTPUT_ENABLE01,
1250                                on ? 0x7f : 0);
1251         if (ret)
1252                 return ret;
1253
1254         /*
1255          * enable D[5:0] DVP data lines
1256          *
1257          * PAD OUTPUT ENABLE 02
1258          * - [7:2]:     D[5:0] output enable
1259          */
1260         return ov5640_write_reg(sensor,
1261                                 OV5640_REG_PAD_OUTPUT_ENABLE02,
1262                                 on ? 0xfc : 0);
1263 }
1264
1265 static int ov5640_set_stream_mipi(struct ov5640_dev *sensor, bool on)
1266 {
1267         int ret;
1268
1269         /*
1270          * Enable/disable the MIPI interface
1271          *
1272          * 0x300e = on ? 0x45 : 0x40
1273          *
1274          * FIXME: the sensor manual (version 2.03) reports
1275          * [7:5] = 000  : 1 data lane mode
1276          * [7:5] = 001  : 2 data lanes mode
1277          * But this settings do not work, while the following ones
1278          * have been validated for 2 data lanes mode.
1279          *
1280          * [7:5] = 010  : 2 data lanes mode
1281          * [4] = 0      : Power up MIPI HS Tx
1282          * [3] = 0      : Power up MIPI LS Rx
1283          * [2] = 1/0    : MIPI interface enable/disable
1284          * [1:0] = 01/00: FIXME: 'debug'
1285          */
1286         ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00,
1287                                on ? 0x45 : 0x40);
1288         if (ret)
1289                 return ret;
1290
1291         return ov5640_write_reg(sensor, OV5640_REG_FRAME_CTRL01,
1292                                 on ? 0x00 : 0x0f);
1293 }
1294
1295 static int ov5640_get_sysclk(struct ov5640_dev *sensor)
1296 {
1297          /* calculate sysclk */
1298         u32 xvclk = sensor->xclk_freq / 10000;
1299         u32 multiplier, prediv, VCO, sysdiv, pll_rdiv;
1300         u32 sclk_rdiv_map[] = {1, 2, 4, 8};
1301         u32 bit_div2x = 1, sclk_rdiv, sysclk;
1302         u8 temp1, temp2;
1303         int ret;
1304
1305         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL0, &temp1);
1306         if (ret)
1307                 return ret;
1308         temp2 = temp1 & 0x0f;
1309         if (temp2 == 8 || temp2 == 10)
1310                 bit_div2x = temp2 / 2;
1311
1312         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL1, &temp1);
1313         if (ret)
1314                 return ret;
1315         sysdiv = temp1 >> 4;
1316         if (sysdiv == 0)
1317                 sysdiv = 16;
1318
1319         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL2, &temp1);
1320         if (ret)
1321                 return ret;
1322         multiplier = temp1;
1323
1324         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL3, &temp1);
1325         if (ret)
1326                 return ret;
1327         prediv = temp1 & 0x0f;
1328         pll_rdiv = ((temp1 >> 4) & 0x01) + 1;
1329
1330         ret = ov5640_read_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, &temp1);
1331         if (ret)
1332                 return ret;
1333         temp2 = temp1 & 0x03;
1334         sclk_rdiv = sclk_rdiv_map[temp2];
1335
1336         if (!prediv || !sysdiv || !pll_rdiv || !bit_div2x)
1337                 return -EINVAL;
1338
1339         VCO = xvclk * multiplier / prediv;
1340
1341         sysclk = VCO / sysdiv / pll_rdiv * 2 / bit_div2x / sclk_rdiv;
1342
1343         return sysclk;
1344 }
1345
1346 static int ov5640_set_night_mode(struct ov5640_dev *sensor)
1347 {
1348          /* read HTS from register settings */
1349         u8 mode;
1350         int ret;
1351
1352         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_CTRL00, &mode);
1353         if (ret)
1354                 return ret;
1355         mode &= 0xfb;
1356         return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL00, mode);
1357 }
1358
1359 static int ov5640_get_hts(struct ov5640_dev *sensor)
1360 {
1361         /* read HTS from register settings */
1362         u16 hts;
1363         int ret;
1364
1365         ret = ov5640_read_reg16(sensor, OV5640_REG_TIMING_HTS, &hts);
1366         if (ret)
1367                 return ret;
1368         return hts;
1369 }
1370
1371 static int ov5640_get_vts(struct ov5640_dev *sensor)
1372 {
1373         u16 vts;
1374         int ret;
1375
1376         ret = ov5640_read_reg16(sensor, OV5640_REG_TIMING_VTS, &vts);
1377         if (ret)
1378                 return ret;
1379         return vts;
1380 }
1381
1382 static int ov5640_set_vts(struct ov5640_dev *sensor, int vts)
1383 {
1384         return ov5640_write_reg16(sensor, OV5640_REG_TIMING_VTS, vts);
1385 }
1386
1387 static int ov5640_get_light_freq(struct ov5640_dev *sensor)
1388 {
1389         /* get banding filter value */
1390         int ret, light_freq = 0;
1391         u8 temp, temp1;
1392
1393         ret = ov5640_read_reg(sensor, OV5640_REG_HZ5060_CTRL01, &temp);
1394         if (ret)
1395                 return ret;
1396
1397         if (temp & 0x80) {
1398                 /* manual */
1399                 ret = ov5640_read_reg(sensor, OV5640_REG_HZ5060_CTRL00,
1400                                       &temp1);
1401                 if (ret)
1402                         return ret;
1403                 if (temp1 & 0x04) {
1404                         /* 50Hz */
1405                         light_freq = 50;
1406                 } else {
1407                         /* 60Hz */
1408                         light_freq = 60;
1409                 }
1410         } else {
1411                 /* auto */
1412                 ret = ov5640_read_reg(sensor, OV5640_REG_SIGMADELTA_CTRL0C,
1413                                       &temp1);
1414                 if (ret)
1415                         return ret;
1416
1417                 if (temp1 & 0x01) {
1418                         /* 50Hz */
1419                         light_freq = 50;
1420                 } else {
1421                         /* 60Hz */
1422                 }
1423         }
1424
1425         return light_freq;
1426 }
1427
1428 static int ov5640_set_bandingfilter(struct ov5640_dev *sensor)
1429 {
1430         u32 band_step60, max_band60, band_step50, max_band50, prev_vts;
1431         int ret;
1432
1433         /* read preview PCLK */
1434         ret = ov5640_get_sysclk(sensor);
1435         if (ret < 0)
1436                 return ret;
1437         if (ret == 0)
1438                 return -EINVAL;
1439         sensor->prev_sysclk = ret;
1440         /* read preview HTS */
1441         ret = ov5640_get_hts(sensor);
1442         if (ret < 0)
1443                 return ret;
1444         if (ret == 0)
1445                 return -EINVAL;
1446         sensor->prev_hts = ret;
1447
1448         /* read preview VTS */
1449         ret = ov5640_get_vts(sensor);
1450         if (ret < 0)
1451                 return ret;
1452         prev_vts = ret;
1453
1454         /* calculate banding filter */
1455         /* 60Hz */
1456         band_step60 = sensor->prev_sysclk * 100 / sensor->prev_hts * 100 / 120;
1457         ret = ov5640_write_reg16(sensor, OV5640_REG_AEC_B60_STEP, band_step60);
1458         if (ret)
1459                 return ret;
1460         if (!band_step60)
1461                 return -EINVAL;
1462         max_band60 = (int)((prev_vts - 4) / band_step60);
1463         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0D, max_band60);
1464         if (ret)
1465                 return ret;
1466
1467         /* 50Hz */
1468         band_step50 = sensor->prev_sysclk * 100 / sensor->prev_hts;
1469         ret = ov5640_write_reg16(sensor, OV5640_REG_AEC_B50_STEP, band_step50);
1470         if (ret)
1471                 return ret;
1472         if (!band_step50)
1473                 return -EINVAL;
1474         max_band50 = (int)((prev_vts - 4) / band_step50);
1475         return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0E, max_band50);
1476 }
1477
1478 static int ov5640_set_ae_target(struct ov5640_dev *sensor, int target)
1479 {
1480         /* stable in high */
1481         u32 fast_high, fast_low;
1482         int ret;
1483
1484         sensor->ae_low = target * 23 / 25;      /* 0.92 */
1485         sensor->ae_high = target * 27 / 25;     /* 1.08 */
1486
1487         fast_high = sensor->ae_high << 1;
1488         if (fast_high > 255)
1489                 fast_high = 255;
1490
1491         fast_low = sensor->ae_low >> 1;
1492
1493         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0F, sensor->ae_high);
1494         if (ret)
1495                 return ret;
1496         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL10, sensor->ae_low);
1497         if (ret)
1498                 return ret;
1499         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1B, sensor->ae_high);
1500         if (ret)
1501                 return ret;
1502         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1E, sensor->ae_low);
1503         if (ret)
1504                 return ret;
1505         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL11, fast_high);
1506         if (ret)
1507                 return ret;
1508         return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1F, fast_low);
1509 }
1510
1511 static int ov5640_get_binning(struct ov5640_dev *sensor)
1512 {
1513         u8 temp;
1514         int ret;
1515
1516         ret = ov5640_read_reg(sensor, OV5640_REG_TIMING_TC_REG21, &temp);
1517         if (ret)
1518                 return ret;
1519
1520         return temp & BIT(0);
1521 }
1522
1523 static int ov5640_set_binning(struct ov5640_dev *sensor, bool enable)
1524 {
1525         int ret;
1526
1527         /*
1528          * TIMING TC REG21:
1529          * - [0]:       Horizontal binning enable
1530          */
1531         ret = ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
1532                              BIT(0), enable ? BIT(0) : 0);
1533         if (ret)
1534                 return ret;
1535         /*
1536          * TIMING TC REG20:
1537          * - [0]:       Undocumented, but hardcoded init sequences
1538          *              are always setting REG21/REG20 bit 0 to same value...
1539          */
1540         return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG20,
1541                               BIT(0), enable ? BIT(0) : 0);
1542 }
1543
1544 static int ov5640_set_virtual_channel(struct ov5640_dev *sensor)
1545 {
1546         struct i2c_client *client = sensor->i2c_client;
1547         u8 temp, channel = virtual_channel;
1548         int ret;
1549
1550         if (channel > 3) {
1551                 dev_err(&client->dev,
1552                         "%s: wrong virtual_channel parameter, expected (0..3), got %d\n",
1553                         __func__, channel);
1554                 return -EINVAL;
1555         }
1556
1557         ret = ov5640_read_reg(sensor, OV5640_REG_DEBUG_MODE, &temp);
1558         if (ret)
1559                 return ret;
1560         temp &= ~(3 << 6);
1561         temp |= (channel << 6);
1562         return ov5640_write_reg(sensor, OV5640_REG_DEBUG_MODE, temp);
1563 }
1564
1565 static const struct ov5640_mode_info *
1566 ov5640_find_mode(struct ov5640_dev *sensor, enum ov5640_frame_rate fr,
1567                  int width, int height, bool nearest)
1568 {
1569         const struct ov5640_mode_info *mode;
1570
1571         mode = v4l2_find_nearest_size(ov5640_mode_data,
1572                                       ARRAY_SIZE(ov5640_mode_data),
1573                                       hact, vact,
1574                                       width, height);
1575
1576         if (!mode ||
1577             (!nearest && (mode->hact != width || mode->vact != height)))
1578                 return NULL;
1579
1580         /* Only 640x480 can operate at 60fps (for now) */
1581         if (fr == OV5640_60_FPS &&
1582             !(mode->hact == 640 && mode->vact == 480))
1583                 return NULL;
1584
1585         return mode;
1586 }
1587
1588 /*
1589  * sensor changes between scaling and subsampling, go through
1590  * exposure calculation
1591  */
1592 static int ov5640_set_mode_exposure_calc(struct ov5640_dev *sensor,
1593                                          const struct ov5640_mode_info *mode)
1594 {
1595         u32 prev_shutter, prev_gain16;
1596         u32 cap_shutter, cap_gain16;
1597         u32 cap_sysclk, cap_hts, cap_vts;
1598         u32 light_freq, cap_bandfilt, cap_maxband;
1599         u32 cap_gain16_shutter;
1600         u8 average;
1601         int ret;
1602
1603         if (!mode->reg_data)
1604                 return -EINVAL;
1605
1606         /* read preview shutter */
1607         ret = ov5640_get_exposure(sensor);
1608         if (ret < 0)
1609                 return ret;
1610         prev_shutter = ret;
1611         ret = ov5640_get_binning(sensor);
1612         if (ret < 0)
1613                 return ret;
1614         if (ret && mode->id != OV5640_MODE_720P_1280_720 &&
1615             mode->id != OV5640_MODE_1080P_1920_1080)
1616                 prev_shutter *= 2;
1617
1618         /* read preview gain */
1619         ret = ov5640_get_gain(sensor);
1620         if (ret < 0)
1621                 return ret;
1622         prev_gain16 = ret;
1623
1624         /* get average */
1625         ret = ov5640_read_reg(sensor, OV5640_REG_AVG_READOUT, &average);
1626         if (ret)
1627                 return ret;
1628
1629         /* turn off night mode for capture */
1630         ret = ov5640_set_night_mode(sensor);
1631         if (ret < 0)
1632                 return ret;
1633
1634         /* Write capture setting */
1635         ret = ov5640_load_regs(sensor, mode);
1636         if (ret < 0)
1637                 return ret;
1638
1639         /* read capture VTS */
1640         ret = ov5640_get_vts(sensor);
1641         if (ret < 0)
1642                 return ret;
1643         cap_vts = ret;
1644         ret = ov5640_get_hts(sensor);
1645         if (ret < 0)
1646                 return ret;
1647         if (ret == 0)
1648                 return -EINVAL;
1649         cap_hts = ret;
1650
1651         ret = ov5640_get_sysclk(sensor);
1652         if (ret < 0)
1653                 return ret;
1654         if (ret == 0)
1655                 return -EINVAL;
1656         cap_sysclk = ret;
1657
1658         /* calculate capture banding filter */
1659         ret = ov5640_get_light_freq(sensor);
1660         if (ret < 0)
1661                 return ret;
1662         light_freq = ret;
1663
1664         if (light_freq == 60) {
1665                 /* 60Hz */
1666                 cap_bandfilt = cap_sysclk * 100 / cap_hts * 100 / 120;
1667         } else {
1668                 /* 50Hz */
1669                 cap_bandfilt = cap_sysclk * 100 / cap_hts;
1670         }
1671
1672         if (!sensor->prev_sysclk) {
1673                 ret = ov5640_get_sysclk(sensor);
1674                 if (ret < 0)
1675                         return ret;
1676                 if (ret == 0)
1677                         return -EINVAL;
1678                 sensor->prev_sysclk = ret;
1679         }
1680
1681         if (!cap_bandfilt)
1682                 return -EINVAL;
1683
1684         cap_maxband = (int)((cap_vts - 4) / cap_bandfilt);
1685
1686         /* calculate capture shutter/gain16 */
1687         if (average > sensor->ae_low && average < sensor->ae_high) {
1688                 /* in stable range */
1689                 cap_gain16_shutter =
1690                         prev_gain16 * prev_shutter *
1691                         cap_sysclk / sensor->prev_sysclk *
1692                         sensor->prev_hts / cap_hts *
1693                         sensor->ae_target / average;
1694         } else {
1695                 cap_gain16_shutter =
1696                         prev_gain16 * prev_shutter *
1697                         cap_sysclk / sensor->prev_sysclk *
1698                         sensor->prev_hts / cap_hts;
1699         }
1700
1701         /* gain to shutter */
1702         if (cap_gain16_shutter < (cap_bandfilt * 16)) {
1703                 /* shutter < 1/100 */
1704                 cap_shutter = cap_gain16_shutter / 16;
1705                 if (cap_shutter < 1)
1706                         cap_shutter = 1;
1707
1708                 cap_gain16 = cap_gain16_shutter / cap_shutter;
1709                 if (cap_gain16 < 16)
1710                         cap_gain16 = 16;
1711         } else {
1712                 if (cap_gain16_shutter > (cap_bandfilt * cap_maxband * 16)) {
1713                         /* exposure reach max */
1714                         cap_shutter = cap_bandfilt * cap_maxband;
1715                         if (!cap_shutter)
1716                                 return -EINVAL;
1717
1718                         cap_gain16 = cap_gain16_shutter / cap_shutter;
1719                 } else {
1720                         /* 1/100 < (cap_shutter = n/100) =< max */
1721                         cap_shutter =
1722                                 ((int)(cap_gain16_shutter / 16 / cap_bandfilt))
1723                                 * cap_bandfilt;
1724                         if (!cap_shutter)
1725                                 return -EINVAL;
1726
1727                         cap_gain16 = cap_gain16_shutter / cap_shutter;
1728                 }
1729         }
1730
1731         /* set capture gain */
1732         ret = ov5640_set_gain(sensor, cap_gain16);
1733         if (ret)
1734                 return ret;
1735
1736         /* write capture shutter */
1737         if (cap_shutter > (cap_vts - 4)) {
1738                 cap_vts = cap_shutter + 4;
1739                 ret = ov5640_set_vts(sensor, cap_vts);
1740                 if (ret < 0)
1741                         return ret;
1742         }
1743
1744         /* set exposure */
1745         return ov5640_set_exposure(sensor, cap_shutter);
1746 }
1747
1748 /*
1749  * if sensor changes inside scaling or subsampling
1750  * change mode directly
1751  */
1752 static int ov5640_set_mode_direct(struct ov5640_dev *sensor,
1753                                   const struct ov5640_mode_info *mode)
1754 {
1755         if (!mode->reg_data)
1756                 return -EINVAL;
1757
1758         /* Write capture setting */
1759         return ov5640_load_regs(sensor, mode);
1760 }
1761
1762 static int ov5640_set_mode(struct ov5640_dev *sensor)
1763 {
1764         const struct ov5640_mode_info *mode = sensor->current_mode;
1765         const struct ov5640_mode_info *orig_mode = sensor->last_mode;
1766         enum ov5640_downsize_mode dn_mode, orig_dn_mode;
1767         bool auto_gain = sensor->ctrls.auto_gain->val == 1;
1768         bool auto_exp =  sensor->ctrls.auto_exp->val == V4L2_EXPOSURE_AUTO;
1769         unsigned long rate;
1770         int ret;
1771
1772         dn_mode = mode->dn_mode;
1773         orig_dn_mode = orig_mode->dn_mode;
1774
1775         /* auto gain and exposure must be turned off when changing modes */
1776         if (auto_gain) {
1777                 ret = ov5640_set_autogain(sensor, false);
1778                 if (ret)
1779                         return ret;
1780         }
1781
1782         if (auto_exp) {
1783                 ret = ov5640_set_autoexposure(sensor, false);
1784                 if (ret)
1785                         goto restore_auto_gain;
1786         }
1787
1788         /*
1789          * All the formats we support have 16 bits per pixel, seems to require
1790          * the same rate than YUV, so we can just use 16 bpp all the time.
1791          */
1792         rate = mode->vtot * mode->htot * 16;
1793         rate *= ov5640_framerates[sensor->current_fr];
1794         if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY) {
1795                 rate = rate / sensor->ep.bus.mipi_csi2.num_data_lanes;
1796                 ret = ov5640_set_mipi_pclk(sensor, rate);
1797         } else {
1798                 rate = rate / sensor->ep.bus.parallel.bus_width;
1799                 ret = ov5640_set_dvp_pclk(sensor, rate);
1800         }
1801
1802         if (ret < 0)
1803                 return 0;
1804
1805         if ((dn_mode == SUBSAMPLING && orig_dn_mode == SCALING) ||
1806             (dn_mode == SCALING && orig_dn_mode == SUBSAMPLING)) {
1807                 /*
1808                  * change between subsampling and scaling
1809                  * go through exposure calculation
1810                  */
1811                 ret = ov5640_set_mode_exposure_calc(sensor, mode);
1812         } else {
1813                 /*
1814                  * change inside subsampling or scaling
1815                  * download firmware directly
1816                  */
1817                 ret = ov5640_set_mode_direct(sensor, mode);
1818         }
1819         if (ret < 0)
1820                 goto restore_auto_exp_gain;
1821
1822         /* restore auto gain and exposure */
1823         if (auto_gain)
1824                 ov5640_set_autogain(sensor, true);
1825         if (auto_exp)
1826                 ov5640_set_autoexposure(sensor, true);
1827
1828         ret = ov5640_set_binning(sensor, dn_mode != SCALING);
1829         if (ret < 0)
1830                 return ret;
1831         ret = ov5640_set_ae_target(sensor, sensor->ae_target);
1832         if (ret < 0)
1833                 return ret;
1834         ret = ov5640_get_light_freq(sensor);
1835         if (ret < 0)
1836                 return ret;
1837         ret = ov5640_set_bandingfilter(sensor);
1838         if (ret < 0)
1839                 return ret;
1840         ret = ov5640_set_virtual_channel(sensor);
1841         if (ret < 0)
1842                 return ret;
1843
1844         sensor->pending_mode_change = false;
1845         sensor->last_mode = mode;
1846
1847         return 0;
1848
1849 restore_auto_exp_gain:
1850         if (auto_exp)
1851                 ov5640_set_autoexposure(sensor, true);
1852 restore_auto_gain:
1853         if (auto_gain)
1854                 ov5640_set_autogain(sensor, true);
1855
1856         return ret;
1857 }
1858
1859 static int ov5640_set_framefmt(struct ov5640_dev *sensor,
1860                                struct v4l2_mbus_framefmt *format);
1861
1862 /* restore the last set video mode after chip power-on */
1863 static int ov5640_restore_mode(struct ov5640_dev *sensor)
1864 {
1865         int ret;
1866
1867         /* first load the initial register values */
1868         ret = ov5640_load_regs(sensor, &ov5640_mode_init_data);
1869         if (ret < 0)
1870                 return ret;
1871         sensor->last_mode = &ov5640_mode_init_data;
1872
1873         ret = ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, 0x3f,
1874                              (ilog2(OV5640_SCLK2X_ROOT_DIV) << 2) |
1875                              ilog2(OV5640_SCLK_ROOT_DIV));
1876         if (ret)
1877                 return ret;
1878
1879         /* now restore the last capture mode */
1880         ret = ov5640_set_mode(sensor);
1881         if (ret < 0)
1882                 return ret;
1883
1884         return ov5640_set_framefmt(sensor, &sensor->fmt);
1885 }
1886
1887 static void ov5640_power(struct ov5640_dev *sensor, bool enable)
1888 {
1889         gpiod_set_value_cansleep(sensor->pwdn_gpio, enable ? 0 : 1);
1890 }
1891
1892 static void ov5640_reset(struct ov5640_dev *sensor)
1893 {
1894         if (!sensor->reset_gpio)
1895                 return;
1896
1897         gpiod_set_value_cansleep(sensor->reset_gpio, 0);
1898
1899         /* camera power cycle */
1900         ov5640_power(sensor, false);
1901         usleep_range(5000, 10000);
1902         ov5640_power(sensor, true);
1903         usleep_range(5000, 10000);
1904
1905         gpiod_set_value_cansleep(sensor->reset_gpio, 1);
1906         usleep_range(1000, 2000);
1907
1908         gpiod_set_value_cansleep(sensor->reset_gpio, 0);
1909         usleep_range(5000, 10000);
1910 }
1911
1912 static int ov5640_set_power_on(struct ov5640_dev *sensor)
1913 {
1914         struct i2c_client *client = sensor->i2c_client;
1915         int ret;
1916
1917         ret = clk_prepare_enable(sensor->xclk);
1918         if (ret) {
1919                 dev_err(&client->dev, "%s: failed to enable clock\n",
1920                         __func__);
1921                 return ret;
1922         }
1923
1924         ret = regulator_bulk_enable(OV5640_NUM_SUPPLIES,
1925                                     sensor->supplies);
1926         if (ret) {
1927                 dev_err(&client->dev, "%s: failed to enable regulators\n",
1928                         __func__);
1929                 goto xclk_off;
1930         }
1931
1932         ov5640_reset(sensor);
1933         ov5640_power(sensor, true);
1934
1935         ret = ov5640_init_slave_id(sensor);
1936         if (ret)
1937                 goto power_off;
1938
1939         return 0;
1940
1941 power_off:
1942         ov5640_power(sensor, false);
1943         regulator_bulk_disable(OV5640_NUM_SUPPLIES, sensor->supplies);
1944 xclk_off:
1945         clk_disable_unprepare(sensor->xclk);
1946         return ret;
1947 }
1948
1949 static void ov5640_set_power_off(struct ov5640_dev *sensor)
1950 {
1951         ov5640_power(sensor, false);
1952         regulator_bulk_disable(OV5640_NUM_SUPPLIES, sensor->supplies);
1953         clk_disable_unprepare(sensor->xclk);
1954 }
1955
1956 static int ov5640_set_power(struct ov5640_dev *sensor, bool on)
1957 {
1958         int ret = 0;
1959
1960         if (on) {
1961                 ret = ov5640_set_power_on(sensor);
1962                 if (ret)
1963                         return ret;
1964
1965                 ret = ov5640_restore_mode(sensor);
1966                 if (ret)
1967                         goto power_off;
1968
1969                 /* We're done here for DVP bus, while CSI-2 needs setup. */
1970                 if (sensor->ep.bus_type != V4L2_MBUS_CSI2_DPHY)
1971                         return 0;
1972
1973                 /*
1974                  * Power up MIPI HS Tx and LS Rx; 2 data lanes mode
1975                  *
1976                  * 0x300e = 0x40
1977                  * [7:5] = 010  : 2 data lanes mode (see FIXME note in
1978                  *                "ov5640_set_stream_mipi()")
1979                  * [4] = 0      : Power up MIPI HS Tx
1980                  * [3] = 0      : Power up MIPI LS Rx
1981                  * [2] = 0      : MIPI interface disabled
1982                  */
1983                 ret = ov5640_write_reg(sensor,
1984                                        OV5640_REG_IO_MIPI_CTRL00, 0x40);
1985                 if (ret)
1986                         goto power_off;
1987
1988                 /*
1989                  * Gate clock and set LP11 in 'no packets mode' (idle)
1990                  *
1991                  * 0x4800 = 0x24
1992                  * [5] = 1      : Gate clock when 'no packets'
1993                  * [2] = 1      : MIPI bus in LP11 when 'no packets'
1994                  */
1995                 ret = ov5640_write_reg(sensor,
1996                                        OV5640_REG_MIPI_CTRL00, 0x24);
1997                 if (ret)
1998                         goto power_off;
1999
2000                 /*
2001                  * Set data lanes and clock in LP11 when 'sleeping'
2002                  *
2003                  * 0x3019 = 0x70
2004                  * [6] = 1      : MIPI data lane 2 in LP11 when 'sleeping'
2005                  * [5] = 1      : MIPI data lane 1 in LP11 when 'sleeping'
2006                  * [4] = 1      : MIPI clock lane in LP11 when 'sleeping'
2007                  */
2008                 ret = ov5640_write_reg(sensor,
2009                                        OV5640_REG_PAD_OUTPUT00, 0x70);
2010                 if (ret)
2011                         goto power_off;
2012
2013                 /* Give lanes some time to coax into LP11 state. */
2014                 usleep_range(500, 1000);
2015
2016         } else {
2017                 if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY) {
2018                         /* Reset MIPI bus settings to their default values. */
2019                         ov5640_write_reg(sensor,
2020                                          OV5640_REG_IO_MIPI_CTRL00, 0x58);
2021                         ov5640_write_reg(sensor,
2022                                          OV5640_REG_MIPI_CTRL00, 0x04);
2023                         ov5640_write_reg(sensor,
2024                                          OV5640_REG_PAD_OUTPUT00, 0x00);
2025                 }
2026
2027                 ov5640_set_power_off(sensor);
2028         }
2029
2030         return 0;
2031
2032 power_off:
2033         ov5640_set_power_off(sensor);
2034         return ret;
2035 }
2036
2037 /* --------------- Subdev Operations --------------- */
2038
2039 static int ov5640_s_power(struct v4l2_subdev *sd, int on)
2040 {
2041         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2042         int ret = 0;
2043
2044         mutex_lock(&sensor->lock);
2045
2046         /*
2047          * If the power count is modified from 0 to != 0 or from != 0 to 0,
2048          * update the power state.
2049          */
2050         if (sensor->power_count == !on) {
2051                 ret = ov5640_set_power(sensor, !!on);
2052                 if (ret)
2053                         goto out;
2054         }
2055
2056         /* Update the power count. */
2057         sensor->power_count += on ? 1 : -1;
2058         WARN_ON(sensor->power_count < 0);
2059 out:
2060         mutex_unlock(&sensor->lock);
2061
2062         if (on && !ret && sensor->power_count == 1) {
2063                 /* restore controls */
2064                 ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
2065         }
2066
2067         return ret;
2068 }
2069
2070 static int ov5640_try_frame_interval(struct ov5640_dev *sensor,
2071                                      struct v4l2_fract *fi,
2072                                      u32 width, u32 height)
2073 {
2074         const struct ov5640_mode_info *mode;
2075         enum ov5640_frame_rate rate = OV5640_30_FPS;
2076         int minfps, maxfps, best_fps, fps;
2077         int i;
2078
2079         minfps = ov5640_framerates[OV5640_15_FPS];
2080         maxfps = ov5640_framerates[OV5640_60_FPS];
2081
2082         if (fi->numerator == 0) {
2083                 fi->denominator = maxfps;
2084                 fi->numerator = 1;
2085                 rate = OV5640_60_FPS;
2086                 goto find_mode;
2087         }
2088
2089         fps = clamp_val(DIV_ROUND_CLOSEST(fi->denominator, fi->numerator),
2090                         minfps, maxfps);
2091
2092         best_fps = minfps;
2093         for (i = 0; i < ARRAY_SIZE(ov5640_framerates); i++) {
2094                 int curr_fps = ov5640_framerates[i];
2095
2096                 if (abs(curr_fps - fps) < abs(best_fps - fps)) {
2097                         best_fps = curr_fps;
2098                         rate = i;
2099                 }
2100         }
2101
2102         fi->numerator = 1;
2103         fi->denominator = best_fps;
2104
2105 find_mode:
2106         mode = ov5640_find_mode(sensor, rate, width, height, false);
2107         return mode ? rate : -EINVAL;
2108 }
2109
2110 static int ov5640_get_fmt(struct v4l2_subdev *sd,
2111                           struct v4l2_subdev_pad_config *cfg,
2112                           struct v4l2_subdev_format *format)
2113 {
2114         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2115         struct v4l2_mbus_framefmt *fmt;
2116
2117         if (format->pad != 0)
2118                 return -EINVAL;
2119
2120         mutex_lock(&sensor->lock);
2121
2122         if (format->which == V4L2_SUBDEV_FORMAT_TRY)
2123                 fmt = v4l2_subdev_get_try_format(&sensor->sd, cfg,
2124                                                  format->pad);
2125         else
2126                 fmt = &sensor->fmt;
2127
2128         format->format = *fmt;
2129
2130         mutex_unlock(&sensor->lock);
2131
2132         return 0;
2133 }
2134
2135 static int ov5640_try_fmt_internal(struct v4l2_subdev *sd,
2136                                    struct v4l2_mbus_framefmt *fmt,
2137                                    enum ov5640_frame_rate fr,
2138                                    const struct ov5640_mode_info **new_mode)
2139 {
2140         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2141         const struct ov5640_mode_info *mode;
2142         int i;
2143
2144         mode = ov5640_find_mode(sensor, fr, fmt->width, fmt->height, true);
2145         if (!mode)
2146                 return -EINVAL;
2147         fmt->width = mode->hact;
2148         fmt->height = mode->vact;
2149
2150         if (new_mode)
2151                 *new_mode = mode;
2152
2153         for (i = 0; i < ARRAY_SIZE(ov5640_formats); i++)
2154                 if (ov5640_formats[i].code == fmt->code)
2155                         break;
2156         if (i >= ARRAY_SIZE(ov5640_formats))
2157                 i = 0;
2158
2159         fmt->code = ov5640_formats[i].code;
2160         fmt->colorspace = ov5640_formats[i].colorspace;
2161         fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
2162         fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
2163         fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
2164
2165         return 0;
2166 }
2167
2168 static int ov5640_set_fmt(struct v4l2_subdev *sd,
2169                           struct v4l2_subdev_pad_config *cfg,
2170                           struct v4l2_subdev_format *format)
2171 {
2172         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2173         const struct ov5640_mode_info *new_mode;
2174         struct v4l2_mbus_framefmt *mbus_fmt = &format->format;
2175         struct v4l2_mbus_framefmt *fmt;
2176         int ret;
2177
2178         if (format->pad != 0)
2179                 return -EINVAL;
2180
2181         mutex_lock(&sensor->lock);
2182
2183         if (sensor->streaming) {
2184                 ret = -EBUSY;
2185                 goto out;
2186         }
2187
2188         ret = ov5640_try_fmt_internal(sd, mbus_fmt,
2189                                       sensor->current_fr, &new_mode);
2190         if (ret)
2191                 goto out;
2192
2193         if (format->which == V4L2_SUBDEV_FORMAT_TRY)
2194                 fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
2195         else
2196                 fmt = &sensor->fmt;
2197
2198         *fmt = *mbus_fmt;
2199
2200         if (new_mode != sensor->current_mode) {
2201                 sensor->current_mode = new_mode;
2202                 sensor->pending_mode_change = true;
2203         }
2204         if (mbus_fmt->code != sensor->fmt.code)
2205                 sensor->pending_fmt_change = true;
2206
2207 out:
2208         mutex_unlock(&sensor->lock);
2209         return ret;
2210 }
2211
2212 static int ov5640_set_framefmt(struct ov5640_dev *sensor,
2213                                struct v4l2_mbus_framefmt *format)
2214 {
2215         int ret = 0;
2216         bool is_jpeg = false;
2217         u8 fmt, mux;
2218
2219         switch (format->code) {
2220         case MEDIA_BUS_FMT_UYVY8_2X8:
2221                 /* YUV422, UYVY */
2222                 fmt = 0x3f;
2223                 mux = OV5640_FMT_MUX_YUV422;
2224                 break;
2225         case MEDIA_BUS_FMT_YUYV8_2X8:
2226                 /* YUV422, YUYV */
2227                 fmt = 0x30;
2228                 mux = OV5640_FMT_MUX_YUV422;
2229                 break;
2230         case MEDIA_BUS_FMT_RGB565_2X8_LE:
2231                 /* RGB565 {g[2:0],b[4:0]},{r[4:0],g[5:3]} */
2232                 fmt = 0x6F;
2233                 mux = OV5640_FMT_MUX_RGB;
2234                 break;
2235         case MEDIA_BUS_FMT_RGB565_2X8_BE:
2236                 /* RGB565 {r[4:0],g[5:3]},{g[2:0],b[4:0]} */
2237                 fmt = 0x61;
2238                 mux = OV5640_FMT_MUX_RGB;
2239                 break;
2240         case MEDIA_BUS_FMT_JPEG_1X8:
2241                 /* YUV422, YUYV */
2242                 fmt = 0x30;
2243                 mux = OV5640_FMT_MUX_YUV422;
2244                 is_jpeg = true;
2245                 break;
2246         case MEDIA_BUS_FMT_SBGGR8_1X8:
2247                 /* Raw, BGBG... / GRGR... */
2248                 fmt = 0x00;
2249                 mux = OV5640_FMT_MUX_RAW_DPC;
2250                 break;
2251         case MEDIA_BUS_FMT_SGBRG8_1X8:
2252                 /* Raw bayer, GBGB... / RGRG... */
2253                 fmt = 0x01;
2254                 mux = OV5640_FMT_MUX_RAW_DPC;
2255                 break;
2256         case MEDIA_BUS_FMT_SGRBG8_1X8:
2257                 /* Raw bayer, GRGR... / BGBG... */
2258                 fmt = 0x02;
2259                 mux = OV5640_FMT_MUX_RAW_DPC;
2260                 break;
2261         case MEDIA_BUS_FMT_SRGGB8_1X8:
2262                 /* Raw bayer, RGRG... / GBGB... */
2263                 fmt = 0x03;
2264                 mux = OV5640_FMT_MUX_RAW_DPC;
2265                 break;
2266         default:
2267                 return -EINVAL;
2268         }
2269
2270         /* FORMAT CONTROL00: YUV and RGB formatting */
2271         ret = ov5640_write_reg(sensor, OV5640_REG_FORMAT_CONTROL00, fmt);
2272         if (ret)
2273                 return ret;
2274
2275         /* FORMAT MUX CONTROL: ISP YUV or RGB */
2276         ret = ov5640_write_reg(sensor, OV5640_REG_ISP_FORMAT_MUX_CTRL, mux);
2277         if (ret)
2278                 return ret;
2279
2280         /*
2281          * TIMING TC REG21:
2282          * - [5]:       JPEG enable
2283          */
2284         ret = ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
2285                              BIT(5), is_jpeg ? BIT(5) : 0);
2286         if (ret)
2287                 return ret;
2288
2289         /*
2290          * SYSTEM RESET02:
2291          * - [4]:       Reset JFIFO
2292          * - [3]:       Reset SFIFO
2293          * - [2]:       Reset JPEG
2294          */
2295         ret = ov5640_mod_reg(sensor, OV5640_REG_SYS_RESET02,
2296                              BIT(4) | BIT(3) | BIT(2),
2297                              is_jpeg ? 0 : (BIT(4) | BIT(3) | BIT(2)));
2298         if (ret)
2299                 return ret;
2300
2301         /*
2302          * CLOCK ENABLE02:
2303          * - [5]:       Enable JPEG 2x clock
2304          * - [3]:       Enable JPEG clock
2305          */
2306         return ov5640_mod_reg(sensor, OV5640_REG_SYS_CLOCK_ENABLE02,
2307                               BIT(5) | BIT(3),
2308                               is_jpeg ? (BIT(5) | BIT(3)) : 0);
2309 }
2310
2311 /*
2312  * Sensor Controls.
2313  */
2314
2315 static int ov5640_set_ctrl_hue(struct ov5640_dev *sensor, int value)
2316 {
2317         int ret;
2318
2319         if (value) {
2320                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
2321                                      BIT(0), BIT(0));
2322                 if (ret)
2323                         return ret;
2324                 ret = ov5640_write_reg16(sensor, OV5640_REG_SDE_CTRL1, value);
2325         } else {
2326                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(0), 0);
2327         }
2328
2329         return ret;
2330 }
2331
2332 static int ov5640_set_ctrl_contrast(struct ov5640_dev *sensor, int value)
2333 {
2334         int ret;
2335
2336         if (value) {
2337                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
2338                                      BIT(2), BIT(2));
2339                 if (ret)
2340                         return ret;
2341                 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL5,
2342                                        value & 0xff);
2343         } else {
2344                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(2), 0);
2345         }
2346
2347         return ret;
2348 }
2349
2350 static int ov5640_set_ctrl_saturation(struct ov5640_dev *sensor, int value)
2351 {
2352         int ret;
2353
2354         if (value) {
2355                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
2356                                      BIT(1), BIT(1));
2357                 if (ret)
2358                         return ret;
2359                 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL3,
2360                                        value & 0xff);
2361                 if (ret)
2362                         return ret;
2363                 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL4,
2364                                        value & 0xff);
2365         } else {
2366                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(1), 0);
2367         }
2368
2369         return ret;
2370 }
2371
2372 static int ov5640_set_ctrl_white_balance(struct ov5640_dev *sensor, int awb)
2373 {
2374         int ret;
2375
2376         ret = ov5640_mod_reg(sensor, OV5640_REG_AWB_MANUAL_CTRL,
2377                              BIT(0), awb ? 0 : 1);
2378         if (ret)
2379                 return ret;
2380
2381         if (!awb) {
2382                 u16 red = (u16)sensor->ctrls.red_balance->val;
2383                 u16 blue = (u16)sensor->ctrls.blue_balance->val;
2384
2385                 ret = ov5640_write_reg16(sensor, OV5640_REG_AWB_R_GAIN, red);
2386                 if (ret)
2387                         return ret;
2388                 ret = ov5640_write_reg16(sensor, OV5640_REG_AWB_B_GAIN, blue);
2389         }
2390
2391         return ret;
2392 }
2393
2394 static int ov5640_set_ctrl_exposure(struct ov5640_dev *sensor,
2395                                     enum v4l2_exposure_auto_type auto_exposure)
2396 {
2397         struct ov5640_ctrls *ctrls = &sensor->ctrls;
2398         bool auto_exp = (auto_exposure == V4L2_EXPOSURE_AUTO);
2399         int ret = 0;
2400
2401         if (ctrls->auto_exp->is_new) {
2402                 ret = ov5640_set_autoexposure(sensor, auto_exp);
2403                 if (ret)
2404                         return ret;
2405         }
2406
2407         if (!auto_exp && ctrls->exposure->is_new) {
2408                 u16 max_exp;
2409
2410                 ret = ov5640_read_reg16(sensor, OV5640_REG_AEC_PK_VTS,
2411                                         &max_exp);
2412                 if (ret)
2413                         return ret;
2414                 ret = ov5640_get_vts(sensor);
2415                 if (ret < 0)
2416                         return ret;
2417                 max_exp += ret;
2418                 ret = 0;
2419
2420                 if (ctrls->exposure->val < max_exp)
2421                         ret = ov5640_set_exposure(sensor, ctrls->exposure->val);
2422         }
2423
2424         return ret;
2425 }
2426
2427 static int ov5640_set_ctrl_gain(struct ov5640_dev *sensor, bool auto_gain)
2428 {
2429         struct ov5640_ctrls *ctrls = &sensor->ctrls;
2430         int ret = 0;
2431
2432         if (ctrls->auto_gain->is_new) {
2433                 ret = ov5640_set_autogain(sensor, auto_gain);
2434                 if (ret)
2435                         return ret;
2436         }
2437
2438         if (!auto_gain && ctrls->gain->is_new)
2439                 ret = ov5640_set_gain(sensor, ctrls->gain->val);
2440
2441         return ret;
2442 }
2443
2444 static const char * const test_pattern_menu[] = {
2445         "Disabled",
2446         "Color bars",
2447 };
2448
2449 #define OV5640_TEST_ENABLE              BIT(7)
2450 #define OV5640_TEST_ROLLING             BIT(6)  /* rolling horizontal bar */
2451 #define OV5640_TEST_TRANSPARENT         BIT(5)
2452 #define OV5640_TEST_SQUARE_BW           BIT(4)  /* black & white squares */
2453 #define OV5640_TEST_BAR_STANDARD        (0 << 2)
2454 #define OV5640_TEST_BAR_VERT_CHANGE_1   (1 << 2)
2455 #define OV5640_TEST_BAR_HOR_CHANGE      (2 << 2)
2456 #define OV5640_TEST_BAR_VERT_CHANGE_2   (3 << 2)
2457 #define OV5640_TEST_BAR                 (0 << 0)
2458 #define OV5640_TEST_RANDOM              (1 << 0)
2459 #define OV5640_TEST_SQUARE              (2 << 0)
2460 #define OV5640_TEST_BLACK               (3 << 0)
2461
2462 static const u8 test_pattern_val[] = {
2463         0,
2464         OV5640_TEST_ENABLE | OV5640_TEST_TRANSPARENT |
2465                 OV5640_TEST_BAR_VERT_CHANGE_1 |
2466                 OV5640_TEST_BAR,
2467 };
2468
2469 static int ov5640_set_ctrl_test_pattern(struct ov5640_dev *sensor, int value)
2470 {
2471         return ov5640_write_reg(sensor, OV5640_REG_PRE_ISP_TEST_SET1,
2472                                 test_pattern_val[value]);
2473 }
2474
2475 static int ov5640_set_ctrl_light_freq(struct ov5640_dev *sensor, int value)
2476 {
2477         int ret;
2478
2479         ret = ov5640_mod_reg(sensor, OV5640_REG_HZ5060_CTRL01, BIT(7),
2480                              (value == V4L2_CID_POWER_LINE_FREQUENCY_AUTO) ?
2481                              0 : BIT(7));
2482         if (ret)
2483                 return ret;
2484
2485         return ov5640_mod_reg(sensor, OV5640_REG_HZ5060_CTRL00, BIT(2),
2486                               (value == V4L2_CID_POWER_LINE_FREQUENCY_50HZ) ?
2487                               BIT(2) : 0);
2488 }
2489
2490 static int ov5640_set_ctrl_hflip(struct ov5640_dev *sensor, int value)
2491 {
2492         /*
2493          * If sensor is mounted upside down, mirror logic is inversed.
2494          *
2495          * Sensor is a BSI (Back Side Illuminated) one,
2496          * so image captured is physically mirrored.
2497          * This is why mirror logic is inversed in
2498          * order to cancel this mirror effect.
2499          */
2500
2501         /*
2502          * TIMING TC REG21:
2503          * - [2]:       ISP mirror
2504          * - [1]:       Sensor mirror
2505          */
2506         return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
2507                               BIT(2) | BIT(1),
2508                               (!(value ^ sensor->upside_down)) ?
2509                               (BIT(2) | BIT(1)) : 0);
2510 }
2511
2512 static int ov5640_set_ctrl_vflip(struct ov5640_dev *sensor, int value)
2513 {
2514         /* If sensor is mounted upside down, flip logic is inversed */
2515
2516         /*
2517          * TIMING TC REG20:
2518          * - [2]:       ISP vflip
2519          * - [1]:       Sensor vflip
2520          */
2521         return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG20,
2522                               BIT(2) | BIT(1),
2523                               (value ^ sensor->upside_down) ?
2524                               (BIT(2) | BIT(1)) : 0);
2525 }
2526
2527 static int ov5640_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
2528 {
2529         struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
2530         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2531         int val;
2532
2533         /* v4l2_ctrl_lock() locks our own mutex */
2534
2535         switch (ctrl->id) {
2536         case V4L2_CID_AUTOGAIN:
2537                 val = ov5640_get_gain(sensor);
2538                 if (val < 0)
2539                         return val;
2540                 sensor->ctrls.gain->val = val;
2541                 break;
2542         case V4L2_CID_EXPOSURE_AUTO:
2543                 val = ov5640_get_exposure(sensor);
2544                 if (val < 0)
2545                         return val;
2546                 sensor->ctrls.exposure->val = val;
2547                 break;
2548         }
2549
2550         return 0;
2551 }
2552
2553 static int ov5640_s_ctrl(struct v4l2_ctrl *ctrl)
2554 {
2555         struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
2556         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2557         int ret;
2558
2559         /* v4l2_ctrl_lock() locks our own mutex */
2560
2561         /*
2562          * If the device is not powered up by the host driver do
2563          * not apply any controls to H/W at this time. Instead
2564          * the controls will be restored right after power-up.
2565          */
2566         if (sensor->power_count == 0)
2567                 return 0;
2568
2569         switch (ctrl->id) {
2570         case V4L2_CID_AUTOGAIN:
2571                 ret = ov5640_set_ctrl_gain(sensor, ctrl->val);
2572                 break;
2573         case V4L2_CID_EXPOSURE_AUTO:
2574                 ret = ov5640_set_ctrl_exposure(sensor, ctrl->val);
2575                 break;
2576         case V4L2_CID_AUTO_WHITE_BALANCE:
2577                 ret = ov5640_set_ctrl_white_balance(sensor, ctrl->val);
2578                 break;
2579         case V4L2_CID_HUE:
2580                 ret = ov5640_set_ctrl_hue(sensor, ctrl->val);
2581                 break;
2582         case V4L2_CID_CONTRAST:
2583                 ret = ov5640_set_ctrl_contrast(sensor, ctrl->val);
2584                 break;
2585         case V4L2_CID_SATURATION:
2586                 ret = ov5640_set_ctrl_saturation(sensor, ctrl->val);
2587                 break;
2588         case V4L2_CID_TEST_PATTERN:
2589                 ret = ov5640_set_ctrl_test_pattern(sensor, ctrl->val);
2590                 break;
2591         case V4L2_CID_POWER_LINE_FREQUENCY:
2592                 ret = ov5640_set_ctrl_light_freq(sensor, ctrl->val);
2593                 break;
2594         case V4L2_CID_HFLIP:
2595                 ret = ov5640_set_ctrl_hflip(sensor, ctrl->val);
2596                 break;
2597         case V4L2_CID_VFLIP:
2598                 ret = ov5640_set_ctrl_vflip(sensor, ctrl->val);
2599                 break;
2600         default:
2601                 ret = -EINVAL;
2602                 break;
2603         }
2604
2605         return ret;
2606 }
2607
2608 static const struct v4l2_ctrl_ops ov5640_ctrl_ops = {
2609         .g_volatile_ctrl = ov5640_g_volatile_ctrl,
2610         .s_ctrl = ov5640_s_ctrl,
2611 };
2612
2613 static int ov5640_init_controls(struct ov5640_dev *sensor)
2614 {
2615         const struct v4l2_ctrl_ops *ops = &ov5640_ctrl_ops;
2616         struct ov5640_ctrls *ctrls = &sensor->ctrls;
2617         struct v4l2_ctrl_handler *hdl = &ctrls->handler;
2618         int ret;
2619
2620         v4l2_ctrl_handler_init(hdl, 32);
2621
2622         /* we can use our own mutex for the ctrl lock */
2623         hdl->lock = &sensor->lock;
2624
2625         /* Auto/manual white balance */
2626         ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops,
2627                                            V4L2_CID_AUTO_WHITE_BALANCE,
2628                                            0, 1, 1, 1);
2629         ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE,
2630                                                 0, 4095, 1, 0);
2631         ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE,
2632                                                0, 4095, 1, 0);
2633         /* Auto/manual exposure */
2634         ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops,
2635                                                  V4L2_CID_EXPOSURE_AUTO,
2636                                                  V4L2_EXPOSURE_MANUAL, 0,
2637                                                  V4L2_EXPOSURE_AUTO);
2638         ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
2639                                             0, 65535, 1, 0);
2640         /* Auto/manual gain */
2641         ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN,
2642                                              0, 1, 1, 1);
2643         ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN,
2644                                         0, 1023, 1, 0);
2645
2646         ctrls->saturation = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION,
2647                                               0, 255, 1, 64);
2648         ctrls->hue = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HUE,
2649                                        0, 359, 1, 0);
2650         ctrls->contrast = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST,
2651                                             0, 255, 1, 0);
2652         ctrls->test_pattern =
2653                 v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN,
2654                                              ARRAY_SIZE(test_pattern_menu) - 1,
2655                                              0, 0, test_pattern_menu);
2656         ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP,
2657                                          0, 1, 1, 0);
2658         ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP,
2659                                          0, 1, 1, 0);
2660
2661         ctrls->light_freq =
2662                 v4l2_ctrl_new_std_menu(hdl, ops,
2663                                        V4L2_CID_POWER_LINE_FREQUENCY,
2664                                        V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
2665                                        V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
2666
2667         if (hdl->error) {
2668                 ret = hdl->error;
2669                 goto free_ctrls;
2670         }
2671
2672         ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
2673         ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;
2674
2675         v4l2_ctrl_auto_cluster(3, &ctrls->auto_wb, 0, false);
2676         v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true);
2677         v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true);
2678
2679         sensor->sd.ctrl_handler = hdl;
2680         return 0;
2681
2682 free_ctrls:
2683         v4l2_ctrl_handler_free(hdl);
2684         return ret;
2685 }
2686
2687 static int ov5640_enum_frame_size(struct v4l2_subdev *sd,
2688                                   struct v4l2_subdev_pad_config *cfg,
2689                                   struct v4l2_subdev_frame_size_enum *fse)
2690 {
2691         if (fse->pad != 0)
2692                 return -EINVAL;
2693         if (fse->index >= OV5640_NUM_MODES)
2694                 return -EINVAL;
2695
2696         fse->min_width =
2697                 ov5640_mode_data[fse->index].hact;
2698         fse->max_width = fse->min_width;
2699         fse->min_height =
2700                 ov5640_mode_data[fse->index].vact;
2701         fse->max_height = fse->min_height;
2702
2703         return 0;
2704 }
2705
2706 static int ov5640_enum_frame_interval(
2707         struct v4l2_subdev *sd,
2708         struct v4l2_subdev_pad_config *cfg,
2709         struct v4l2_subdev_frame_interval_enum *fie)
2710 {
2711         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2712         struct v4l2_fract tpf;
2713         int ret;
2714
2715         if (fie->pad != 0)
2716                 return -EINVAL;
2717         if (fie->index >= OV5640_NUM_FRAMERATES)
2718                 return -EINVAL;
2719
2720         tpf.numerator = 1;
2721         tpf.denominator = ov5640_framerates[fie->index];
2722
2723         ret = ov5640_try_frame_interval(sensor, &tpf,
2724                                         fie->width, fie->height);
2725         if (ret < 0)
2726                 return -EINVAL;
2727
2728         fie->interval = tpf;
2729         return 0;
2730 }
2731
2732 static int ov5640_g_frame_interval(struct v4l2_subdev *sd,
2733                                    struct v4l2_subdev_frame_interval *fi)
2734 {
2735         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2736
2737         mutex_lock(&sensor->lock);
2738         fi->interval = sensor->frame_interval;
2739         mutex_unlock(&sensor->lock);
2740
2741         return 0;
2742 }
2743
2744 static int ov5640_s_frame_interval(struct v4l2_subdev *sd,
2745                                    struct v4l2_subdev_frame_interval *fi)
2746 {
2747         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2748         const struct ov5640_mode_info *mode;
2749         int frame_rate, ret = 0;
2750
2751         if (fi->pad != 0)
2752                 return -EINVAL;
2753
2754         mutex_lock(&sensor->lock);
2755
2756         if (sensor->streaming) {
2757                 ret = -EBUSY;
2758                 goto out;
2759         }
2760
2761         mode = sensor->current_mode;
2762
2763         frame_rate = ov5640_try_frame_interval(sensor, &fi->interval,
2764                                                mode->hact, mode->vact);
2765         if (frame_rate < 0) {
2766                 /* Always return a valid frame interval value */
2767                 fi->interval = sensor->frame_interval;
2768                 goto out;
2769         }
2770
2771         mode = ov5640_find_mode(sensor, frame_rate, mode->hact,
2772                                 mode->vact, true);
2773         if (!mode) {
2774                 ret = -EINVAL;
2775                 goto out;
2776         }
2777
2778         if (mode != sensor->current_mode ||
2779             frame_rate != sensor->current_fr) {
2780                 sensor->current_fr = frame_rate;
2781                 sensor->frame_interval = fi->interval;
2782                 sensor->current_mode = mode;
2783                 sensor->pending_mode_change = true;
2784         }
2785 out:
2786         mutex_unlock(&sensor->lock);
2787         return ret;
2788 }
2789
2790 static int ov5640_enum_mbus_code(struct v4l2_subdev *sd,
2791                                  struct v4l2_subdev_pad_config *cfg,
2792                                  struct v4l2_subdev_mbus_code_enum *code)
2793 {
2794         if (code->pad != 0)
2795                 return -EINVAL;
2796         if (code->index >= ARRAY_SIZE(ov5640_formats))
2797                 return -EINVAL;
2798
2799         code->code = ov5640_formats[code->index].code;
2800         return 0;
2801 }
2802
2803 static int ov5640_s_stream(struct v4l2_subdev *sd, int enable)
2804 {
2805         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2806         int ret = 0;
2807
2808         mutex_lock(&sensor->lock);
2809
2810         if (sensor->streaming == !enable) {
2811                 if (enable && sensor->pending_mode_change) {
2812                         ret = ov5640_set_mode(sensor);
2813                         if (ret)
2814                                 goto out;
2815                 }
2816
2817                 if (enable && sensor->pending_fmt_change) {
2818                         ret = ov5640_set_framefmt(sensor, &sensor->fmt);
2819                         if (ret)
2820                                 goto out;
2821                         sensor->pending_fmt_change = false;
2822                 }
2823
2824                 if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY)
2825                         ret = ov5640_set_stream_mipi(sensor, enable);
2826                 else
2827                         ret = ov5640_set_stream_dvp(sensor, enable);
2828
2829                 if (!ret)
2830                         sensor->streaming = enable;
2831         }
2832 out:
2833         mutex_unlock(&sensor->lock);
2834         return ret;
2835 }
2836
2837 static const struct v4l2_subdev_core_ops ov5640_core_ops = {
2838         .s_power = ov5640_s_power,
2839         .log_status = v4l2_ctrl_subdev_log_status,
2840         .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
2841         .unsubscribe_event = v4l2_event_subdev_unsubscribe,
2842 };
2843
2844 static const struct v4l2_subdev_video_ops ov5640_video_ops = {
2845         .g_frame_interval = ov5640_g_frame_interval,
2846         .s_frame_interval = ov5640_s_frame_interval,
2847         .s_stream = ov5640_s_stream,
2848 };
2849
2850 static const struct v4l2_subdev_pad_ops ov5640_pad_ops = {
2851         .enum_mbus_code = ov5640_enum_mbus_code,
2852         .get_fmt = ov5640_get_fmt,
2853         .set_fmt = ov5640_set_fmt,
2854         .enum_frame_size = ov5640_enum_frame_size,
2855         .enum_frame_interval = ov5640_enum_frame_interval,
2856 };
2857
2858 static const struct v4l2_subdev_ops ov5640_subdev_ops = {
2859         .core = &ov5640_core_ops,
2860         .video = &ov5640_video_ops,
2861         .pad = &ov5640_pad_ops,
2862 };
2863
2864 static int ov5640_get_regulators(struct ov5640_dev *sensor)
2865 {
2866         int i;
2867
2868         for (i = 0; i < OV5640_NUM_SUPPLIES; i++)
2869                 sensor->supplies[i].supply = ov5640_supply_name[i];
2870
2871         return devm_regulator_bulk_get(&sensor->i2c_client->dev,
2872                                        OV5640_NUM_SUPPLIES,
2873                                        sensor->supplies);
2874 }
2875
2876 static int ov5640_check_chip_id(struct ov5640_dev *sensor)
2877 {
2878         struct i2c_client *client = sensor->i2c_client;
2879         int ret = 0;
2880         u16 chip_id;
2881
2882         ret = ov5640_set_power_on(sensor);
2883         if (ret)
2884                 return ret;
2885
2886         ret = ov5640_read_reg16(sensor, OV5640_REG_CHIP_ID, &chip_id);
2887         if (ret) {
2888                 dev_err(&client->dev, "%s: failed to read chip identifier\n",
2889                         __func__);
2890                 goto power_off;
2891         }
2892
2893         if (chip_id != 0x5640) {
2894                 dev_err(&client->dev, "%s: wrong chip identifier, expected 0x5640, got 0x%x\n",
2895                         __func__, chip_id);
2896                 ret = -ENXIO;
2897         }
2898
2899 power_off:
2900         ov5640_set_power_off(sensor);
2901         return ret;
2902 }
2903
2904 static int ov5640_probe(struct i2c_client *client,
2905                         const struct i2c_device_id *id)
2906 {
2907         struct device *dev = &client->dev;
2908         struct fwnode_handle *endpoint;
2909         struct ov5640_dev *sensor;
2910         struct v4l2_mbus_framefmt *fmt;
2911         u32 rotation;
2912         int ret;
2913
2914         sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
2915         if (!sensor)
2916                 return -ENOMEM;
2917
2918         sensor->i2c_client = client;
2919
2920         /*
2921          * default init sequence initialize sensor to
2922          * YUV422 UYVY VGA@30fps
2923          */
2924         fmt = &sensor->fmt;
2925         fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
2926         fmt->colorspace = V4L2_COLORSPACE_SRGB;
2927         fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
2928         fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
2929         fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
2930         fmt->width = 640;
2931         fmt->height = 480;
2932         fmt->field = V4L2_FIELD_NONE;
2933         sensor->frame_interval.numerator = 1;
2934         sensor->frame_interval.denominator = ov5640_framerates[OV5640_30_FPS];
2935         sensor->current_fr = OV5640_30_FPS;
2936         sensor->current_mode =
2937                 &ov5640_mode_data[OV5640_MODE_VGA_640_480];
2938         sensor->last_mode = sensor->current_mode;
2939
2940         sensor->ae_target = 52;
2941
2942         /* optional indication of physical rotation of sensor */
2943         ret = fwnode_property_read_u32(dev_fwnode(&client->dev), "rotation",
2944                                        &rotation);
2945         if (!ret) {
2946                 switch (rotation) {
2947                 case 180:
2948                         sensor->upside_down = true;
2949                         /* fall through */
2950                 case 0:
2951                         break;
2952                 default:
2953                         dev_warn(dev, "%u degrees rotation is not supported, ignoring...\n",
2954                                  rotation);
2955                 }
2956         }
2957
2958         endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(&client->dev),
2959                                                   NULL);
2960         if (!endpoint) {
2961                 dev_err(dev, "endpoint node not found\n");
2962                 return -EINVAL;
2963         }
2964
2965         ret = v4l2_fwnode_endpoint_parse(endpoint, &sensor->ep);
2966         fwnode_handle_put(endpoint);
2967         if (ret) {
2968                 dev_err(dev, "Could not parse endpoint\n");
2969                 return ret;
2970         }
2971
2972         /* get system clock (xclk) */
2973         sensor->xclk = devm_clk_get(dev, "xclk");
2974         if (IS_ERR(sensor->xclk)) {
2975                 dev_err(dev, "failed to get xclk\n");
2976                 return PTR_ERR(sensor->xclk);
2977         }
2978
2979         sensor->xclk_freq = clk_get_rate(sensor->xclk);
2980         if (sensor->xclk_freq < OV5640_XCLK_MIN ||
2981             sensor->xclk_freq > OV5640_XCLK_MAX) {
2982                 dev_err(dev, "xclk frequency out of range: %d Hz\n",
2983                         sensor->xclk_freq);
2984                 return -EINVAL;
2985         }
2986
2987         /* request optional power down pin */
2988         sensor->pwdn_gpio = devm_gpiod_get_optional(dev, "powerdown",
2989                                                     GPIOD_OUT_HIGH);
2990         /* request optional reset pin */
2991         sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset",
2992                                                      GPIOD_OUT_HIGH);
2993
2994         v4l2_i2c_subdev_init(&sensor->sd, client, &ov5640_subdev_ops);
2995
2996         sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
2997                             V4L2_SUBDEV_FL_HAS_EVENTS;
2998         sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
2999         sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
3000         ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
3001         if (ret)
3002                 return ret;
3003
3004         ret = ov5640_get_regulators(sensor);
3005         if (ret)
3006                 return ret;
3007
3008         mutex_init(&sensor->lock);
3009
3010         ret = ov5640_check_chip_id(sensor);
3011         if (ret)
3012                 goto entity_cleanup;
3013
3014         ret = ov5640_init_controls(sensor);
3015         if (ret)
3016                 goto entity_cleanup;
3017
3018         ret = v4l2_async_register_subdev(&sensor->sd);
3019         if (ret)
3020                 goto free_ctrls;
3021
3022         return 0;
3023
3024 free_ctrls:
3025         v4l2_ctrl_handler_free(&sensor->ctrls.handler);
3026 entity_cleanup:
3027         mutex_destroy(&sensor->lock);
3028         media_entity_cleanup(&sensor->sd.entity);
3029         return ret;
3030 }
3031
3032 static int ov5640_remove(struct i2c_client *client)
3033 {
3034         struct v4l2_subdev *sd = i2c_get_clientdata(client);
3035         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3036
3037         v4l2_async_unregister_subdev(&sensor->sd);
3038         mutex_destroy(&sensor->lock);
3039         media_entity_cleanup(&sensor->sd.entity);
3040         v4l2_ctrl_handler_free(&sensor->ctrls.handler);
3041
3042         return 0;
3043 }
3044
3045 static const struct i2c_device_id ov5640_id[] = {
3046         {"ov5640", 0},
3047         {},
3048 };
3049 MODULE_DEVICE_TABLE(i2c, ov5640_id);
3050
3051 static const struct of_device_id ov5640_dt_ids[] = {
3052         { .compatible = "ovti,ov5640" },
3053         { /* sentinel */ }
3054 };
3055 MODULE_DEVICE_TABLE(of, ov5640_dt_ids);
3056
3057 static struct i2c_driver ov5640_i2c_driver = {
3058         .driver = {
3059                 .name  = "ov5640",
3060                 .of_match_table = ov5640_dt_ids,
3061         },
3062         .id_table = ov5640_id,
3063         .probe    = ov5640_probe,
3064         .remove   = ov5640_remove,
3065 };
3066
3067 module_i2c_driver(ov5640_i2c_driver);
3068
3069 MODULE_DESCRIPTION("OV5640 MIPI Camera Subdev Driver");
3070 MODULE_LICENSE("GPL");