drivers/media/i2c/ov5640.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
   4  * Copyright (C) 2014-2017 Mentor Graphics Inc.
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/clk-provider.h>
   9 #include <linux/clkdev.h>
  10 #include <linux/ctype.h>
  11 #include <linux/delay.h>
  12 #include <linux/device.h>
  13 #include <linux/gpio/consumer.h>
  14 #include <linux/i2c.h>
  15 #include <linux/init.h>
  16 #include <linux/module.h>
  17 #include <linux/of_device.h>
  18 #include <linux/regulator/consumer.h>
  19 #include <linux/slab.h>
  20 #include <linux/types.h>
  21 #include <media/v4l2-async.h>
  22 #include <media/v4l2-ctrls.h>
  23 #include <media/v4l2-device.h>
  24 #include <media/v4l2-event.h>
  25 #include <media/v4l2-fwnode.h>
  26 #include <media/v4l2-subdev.h>
  27
  28 /* min/typical/max system clock (xclk) frequencies */
  29 #define OV5640_XCLK_MIN  6000000
  30 #define OV5640_XCLK_MAX 54000000
  31
  32 #define OV5640_DEFAULT_SLAVE_ID 0x3c
  33
  34 #define OV5640_REG_SYS_RESET02          0x3002
  35 #define OV5640_REG_SYS_CLOCK_ENABLE02   0x3006
  36 #define OV5640_REG_SYS_CTRL0            0x3008
  37 #define OV5640_REG_SYS_CTRL0_SW_PWDN    0x42
  38 #define OV5640_REG_SYS_CTRL0_SW_PWUP    0x02
  39 #define OV5640_REG_CHIP_ID              0x300a
  40 #define OV5640_REG_IO_MIPI_CTRL00       0x300e
  41 #define OV5640_REG_PAD_OUTPUT_ENABLE01  0x3017
  42 #define OV5640_REG_PAD_OUTPUT_ENABLE02  0x3018
  43 #define OV5640_REG_PAD_OUTPUT00         0x3019
  44 #define OV5640_REG_SYSTEM_CONTROL1      0x302e
  45 #define OV5640_REG_SC_PLL_CTRL0         0x3034
  46 #define OV5640_REG_SC_PLL_CTRL1         0x3035
  47 #define OV5640_REG_SC_PLL_CTRL2         0x3036
  48 #define OV5640_REG_SC_PLL_CTRL3         0x3037
  49 #define OV5640_REG_SLAVE_ID             0x3100
  50 #define OV5640_REG_SCCB_SYS_CTRL1       0x3103
  51 #define OV5640_REG_SYS_ROOT_DIVIDER     0x3108
  52 #define OV5640_REG_AWB_R_GAIN           0x3400
  53 #define OV5640_REG_AWB_G_GAIN           0x3402
  54 #define OV5640_REG_AWB_B_GAIN           0x3404
  55 #define OV5640_REG_AWB_MANUAL_CTRL      0x3406
  56 #define OV5640_REG_AEC_PK_EXPOSURE_HI   0x3500
  57 #define OV5640_REG_AEC_PK_EXPOSURE_MED  0x3501
  58 #define OV5640_REG_AEC_PK_EXPOSURE_LO   0x3502
  59 #define OV5640_REG_AEC_PK_MANUAL        0x3503
  60 #define OV5640_REG_AEC_PK_REAL_GAIN     0x350a
  61 #define OV5640_REG_AEC_PK_VTS           0x350c
  62 #define OV5640_REG_TIMING_DVPHO         0x3808
  63 #define OV5640_REG_TIMING_DVPVO         0x380a
  64 #define OV5640_REG_TIMING_HTS           0x380c
  65 #define OV5640_REG_TIMING_VTS           0x380e
  66 #define OV5640_REG_TIMING_TC_REG20      0x3820
  67 #define OV5640_REG_TIMING_TC_REG21      0x3821
  68 #define OV5640_REG_AEC_CTRL00           0x3a00
  69 #define OV5640_REG_AEC_B50_STEP         0x3a08
  70 #define OV5640_REG_AEC_B60_STEP         0x3a0a
  71 #define OV5640_REG_AEC_CTRL0D           0x3a0d
  72 #define OV5640_REG_AEC_CTRL0E           0x3a0e
  73 #define OV5640_REG_AEC_CTRL0F           0x3a0f
  74 #define OV5640_REG_AEC_CTRL10           0x3a10
  75 #define OV5640_REG_AEC_CTRL11           0x3a11
  76 #define OV5640_REG_AEC_CTRL1B           0x3a1b
  77 #define OV5640_REG_AEC_CTRL1E           0x3a1e
  78 #define OV5640_REG_AEC_CTRL1F           0x3a1f
  79 #define OV5640_REG_HZ5060_CTRL00        0x3c00
  80 #define OV5640_REG_HZ5060_CTRL01        0x3c01
  81 #define OV5640_REG_SIGMADELTA_CTRL0C    0x3c0c
  82 #define OV5640_REG_FRAME_CTRL01         0x4202
  83 #define OV5640_REG_FORMAT_CONTROL00     0x4300
  84 #define OV5640_REG_VFIFO_HSIZE          0x4602
  85 #define OV5640_REG_VFIFO_VSIZE          0x4604
  86 #define OV5640_REG_JPG_MODE_SELECT      0x4713
  87 #define OV5640_REG_CCIR656_CTRL00       0x4730
  88 #define OV5640_REG_POLARITY_CTRL00      0x4740
  89 #define OV5640_REG_MIPI_CTRL00          0x4800
  90 #define OV5640_REG_DEBUG_MODE           0x4814
  91 #define OV5640_REG_ISP_FORMAT_MUX_CTRL  0x501f
  92 #define OV5640_REG_PRE_ISP_TEST_SET1    0x503d
  93 #define OV5640_REG_SDE_CTRL0            0x5580
  94 #define OV5640_REG_SDE_CTRL1            0x5581
  95 #define OV5640_REG_SDE_CTRL3            0x5583
  96 #define OV5640_REG_SDE_CTRL4            0x5584
  97 #define OV5640_REG_SDE_CTRL5            0x5585
  98 #define OV5640_REG_AVG_READOUT          0x56a1
  99
 100 enum ov5640_mode_id {
 101         OV5640_MODE_QCIF_176_144 = 0,
 102         OV5640_MODE_QVGA_320_240,
 103         OV5640_MODE_VGA_640_480,
 104         OV5640_MODE_NTSC_720_480,
 105         OV5640_MODE_PAL_720_576,
 106         OV5640_MODE_XGA_1024_768,
 107         OV5640_MODE_720P_1280_720,
 108         OV5640_MODE_1080P_1920_1080,
 109         OV5640_MODE_QSXGA_2592_1944,
 110         OV5640_NUM_MODES,
 111 };
 112
 113 enum ov5640_frame_rate {
 114         OV5640_15_FPS = 0,
 115         OV5640_30_FPS,
 116         OV5640_60_FPS,
 117         OV5640_NUM_FRAMERATES,
 118 };
 119
 120 enum ov5640_format_mux {
 121         OV5640_FMT_MUX_YUV422 = 0,
 122         OV5640_FMT_MUX_RGB,
 123         OV5640_FMT_MUX_DITHER,
 124         OV5640_FMT_MUX_RAW_DPC,
 125         OV5640_FMT_MUX_SNR_RAW,
 126         OV5640_FMT_MUX_RAW_CIP,
 127 };
 128
 129 struct ov5640_pixfmt {
 130         u32 code;
 131         u32 colorspace;
 132 };
 133
 134 static const struct ov5640_pixfmt ov5640_formats[] = {
 135         { MEDIA_BUS_FMT_JPEG_1X8, V4L2_COLORSPACE_JPEG, },
 136         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_COLORSPACE_SRGB, },
 137         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_SRGB, },
 138         { MEDIA_BUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB, },
 139         { MEDIA_BUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB, },
 140         { MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB, },
 141         { MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_COLORSPACE_SRGB, },
 142         { MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_COLORSPACE_SRGB, },
 143         { MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_COLORSPACE_SRGB, },
 144 };
 145
 146 /*
 147  * FIXME: remove this when a subdev API becomes available
 148  * to set the MIPI CSI-2 virtual channel.
 149  */
 150 static unsigned int virtual_channel;
 151 module_param(virtual_channel, uint, 0444);
 152 MODULE_PARM_DESC(virtual_channel,
 153                  "MIPI CSI-2 virtual channel (0..3), default 0");
 154
 155 static const int ov5640_framerates[] = {
 156         [OV5640_15_FPS] = 15,
 157         [OV5640_30_FPS] = 30,
 158         [OV5640_60_FPS] = 60,
 159 };
 160
 161 /* regulator supplies */
 162 static const char * const ov5640_supply_name[] = {
 163         "DOVDD", /* Digital I/O (1.8V) supply */
 164         "AVDD",  /* Analog (2.8V) supply */
 165         "DVDD",  /* Digital Core (1.5V) supply */
 166 };
 167
 168 #define OV5640_NUM_SUPPLIES ARRAY_SIZE(ov5640_supply_name)
 169
 170 /*
 171  * Image size under 1280 * 960 are SUBSAMPLING
 172  * Image size upper 1280 * 960 are SCALING
 173  */
 174 enum ov5640_downsize_mode {
 175         SUBSAMPLING,
 176         SCALING,
 177 };
 178
 179 struct reg_value {
 180         u16 reg_addr;
 181         u8 val;
 182         u8 mask;
 183         u32 delay_ms;
 184 };
 185
 186 struct ov5640_mode_info {
 187         enum ov5640_mode_id id;
 188         enum ov5640_downsize_mode dn_mode;
 189         u32 hact;
 190         u32 htot;
 191         u32 vact;
 192         u32 vtot;
 193         const struct reg_value *reg_data;
 194         u32 reg_data_size;
 195         u32 max_fps;
 196 };
 197
 198 struct ov5640_ctrls {
 199         struct v4l2_ctrl_handler handler;
 200         struct v4l2_ctrl *pixel_rate;
 201         struct {
 202                 struct v4l2_ctrl *auto_exp;
 203                 struct v4l2_ctrl *exposure;
 204         };
 205         struct {
 206                 struct v4l2_ctrl *auto_wb;
 207                 struct v4l2_ctrl *blue_balance;
 208                 struct v4l2_ctrl *red_balance;
 209         };
 210         struct {
 211                 struct v4l2_ctrl *auto_gain;
 212                 struct v4l2_ctrl *gain;
 213         };
 214         struct v4l2_ctrl *brightness;
 215         struct v4l2_ctrl *light_freq;
 216         struct v4l2_ctrl *saturation;
 217         struct v4l2_ctrl *contrast;
 218         struct v4l2_ctrl *hue;
 219         struct v4l2_ctrl *test_pattern;
 220         struct v4l2_ctrl *hflip;
 221         struct v4l2_ctrl *vflip;
 222 };
 223
 224 struct ov5640_dev {
 225         struct i2c_client *i2c_client;
 226         struct v4l2_subdev sd;
 227         struct media_pad pad;
 228         struct v4l2_fwnode_endpoint ep; /* the parsed DT endpoint info */
 229         struct clk *xclk; /* system clock to OV5640 */
 230         u32 xclk_freq;
 231
 232         struct regulator_bulk_data supplies[OV5640_NUM_SUPPLIES];
 233         struct gpio_desc *reset_gpio;
 234         struct gpio_desc *pwdn_gpio;
 235         bool   upside_down;
 236
 237         /* lock to protect all members below */
 238         struct mutex lock;
 239
 240         int power_count;
 241
 242         struct v4l2_mbus_framefmt fmt;
 243         bool pending_fmt_change;
 244
 245         const struct ov5640_mode_info *current_mode;
 246         const struct ov5640_mode_info *last_mode;
 247         enum ov5640_frame_rate current_fr;
 248         struct v4l2_fract frame_interval;
 249
 250         struct ov5640_ctrls ctrls;
 251
 252         u32 prev_sysclk, prev_hts;
 253         u32 ae_low, ae_high, ae_target;
 254
 255         bool pending_mode_change;
 256         bool streaming;
 257 };
 258
 259 static inline struct ov5640_dev *to_ov5640_dev(struct v4l2_subdev *sd)
 260 {
 261         return container_of(sd, struct ov5640_dev, sd);
 262 }
 263
 264 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
 265 {
 266         return &container_of(ctrl->handler, struct ov5640_dev,
 267                              ctrls.handler)->sd;
 268 }
 269
 270 /*
 271  * FIXME: all of these register tables are likely filled with
 272  * entries that set the register to their power-on default values,
 273  * and which are otherwise not touched by this driver. Those entries
 274  * should be identified and removed to speed register load time
 275  * over i2c.
 276  */
 277 /* YUV422 UYVY VGA@30fps */
 278 static const struct reg_value ov5640_init_setting_30fps_VGA[] = {
 279         {0x3103, 0x11, 0, 0}, {0x3008, 0x82, 0, 5}, {0x3008, 0x42, 0, 0},
 280         {0x3103, 0x03, 0, 0}, {0x3630, 0x36, 0, 0},
 281         {0x3631, 0x0e, 0, 0}, {0x3632, 0xe2, 0, 0}, {0x3633, 0x12, 0, 0},
 282         {0x3621, 0xe0, 0, 0}, {0x3704, 0xa0, 0, 0}, {0x3703, 0x5a, 0, 0},
 283         {0x3715, 0x78, 0, 0}, {0x3717, 0x01, 0, 0}, {0x370b, 0x60, 0, 0},
 284         {0x3705, 0x1a, 0, 0}, {0x3905, 0x02, 0, 0}, {0x3906, 0x10, 0, 0},
 285         {0x3901, 0x0a, 0, 0}, {0x3731, 0x12, 0, 0}, {0x3600, 0x08, 0, 0},
 286         {0x3601, 0x33, 0, 0}, {0x302d, 0x60, 0, 0}, {0x3620, 0x52, 0, 0},
 287         {0x371b, 0x20, 0, 0}, {0x471c, 0x50, 0, 0}, {0x3a13, 0x43, 0, 0},
 288         {0x3a18, 0x00, 0, 0}, {0x3a19, 0xf8, 0, 0}, {0x3635, 0x13, 0, 0},
 289         {0x3636, 0x03, 0, 0}, {0x3634, 0x40, 0, 0}, {0x3622, 0x01, 0, 0},
 290         {0x3c01, 0xa4, 0, 0}, {0x3c04, 0x28, 0, 0}, {0x3c05, 0x98, 0, 0},
 291         {0x3c06, 0x00, 0, 0}, {0x3c07, 0x08, 0, 0}, {0x3c08, 0x00, 0, 0},
 292         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 293         {0x3820, 0x41, 0, 0}, {0x3821, 0x07, 0, 0}, {0x3814, 0x31, 0, 0},
 294         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 295         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 296         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 297         {0x3810, 0x00, 0, 0},
 298         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 299         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 300         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 301         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 302         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 303         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 304         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0}, {0x3000, 0x00, 0, 0},
 305         {0x3002, 0x1c, 0, 0}, {0x3004, 0xff, 0, 0}, {0x3006, 0xc3, 0, 0},
 306         {0x302e, 0x08, 0, 0}, {0x4300, 0x3f, 0, 0},
 307         {0x501f, 0x00, 0, 0}, {0x4407, 0x04, 0, 0},
 308         {0x440e, 0x00, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 309         {0x4837, 0x0a, 0, 0}, {0x3824, 0x02, 0, 0},
 310         {0x5000, 0xa7, 0, 0}, {0x5001, 0xa3, 0, 0}, {0x5180, 0xff, 0, 0},
 311         {0x5181, 0xf2, 0, 0}, {0x5182, 0x00, 0, 0}, {0x5183, 0x14, 0, 0},
 312         {0x5184, 0x25, 0, 0}, {0x5185, 0x24, 0, 0}, {0x5186, 0x09, 0, 0},
 313         {0x5187, 0x09, 0, 0}, {0x5188, 0x09, 0, 0}, {0x5189, 0x88, 0, 0},
 314         {0x518a, 0x54, 0, 0}, {0x518b, 0xee, 0, 0}, {0x518c, 0xb2, 0, 0},
 315         {0x518d, 0x50, 0, 0}, {0x518e, 0x34, 0, 0}, {0x518f, 0x6b, 0, 0},
 316         {0x5190, 0x46, 0, 0}, {0x5191, 0xf8, 0, 0}, {0x5192, 0x04, 0, 0},
 317         {0x5193, 0x70, 0, 0}, {0x5194, 0xf0, 0, 0}, {0x5195, 0xf0, 0, 0},
 318         {0x5196, 0x03, 0, 0}, {0x5197, 0x01, 0, 0}, {0x5198, 0x04, 0, 0},
 319         {0x5199, 0x6c, 0, 0}, {0x519a, 0x04, 0, 0}, {0x519b, 0x00, 0, 0},
 320         {0x519c, 0x09, 0, 0}, {0x519d, 0x2b, 0, 0}, {0x519e, 0x38, 0, 0},
 321         {0x5381, 0x1e, 0, 0}, {0x5382, 0x5b, 0, 0}, {0x5383, 0x08, 0, 0},
 322         {0x5384, 0x0a, 0, 0}, {0x5385, 0x7e, 0, 0}, {0x5386, 0x88, 0, 0},
 323         {0x5387, 0x7c, 0, 0}, {0x5388, 0x6c, 0, 0}, {0x5389, 0x10, 0, 0},
 324         {0x538a, 0x01, 0, 0}, {0x538b, 0x98, 0, 0}, {0x5300, 0x08, 0, 0},
 325         {0x5301, 0x30, 0, 0}, {0x5302, 0x10, 0, 0}, {0x5303, 0x00, 0, 0},
 326         {0x5304, 0x08, 0, 0}, {0x5305, 0x30, 0, 0}, {0x5306, 0x08, 0, 0},
 327         {0x5307, 0x16, 0, 0}, {0x5309, 0x08, 0, 0}, {0x530a, 0x30, 0, 0},
 328         {0x530b, 0x04, 0, 0}, {0x530c, 0x06, 0, 0}, {0x5480, 0x01, 0, 0},
 329         {0x5481, 0x08, 0, 0}, {0x5482, 0x14, 0, 0}, {0x5483, 0x28, 0, 0},
 330         {0x5484, 0x51, 0, 0}, {0x5485, 0x65, 0, 0}, {0x5486, 0x71, 0, 0},
 331         {0x5487, 0x7d, 0, 0}, {0x5488, 0x87, 0, 0}, {0x5489, 0x91, 0, 0},
 332         {0x548a, 0x9a, 0, 0}, {0x548b, 0xaa, 0, 0}, {0x548c, 0xb8, 0, 0},
 333         {0x548d, 0xcd, 0, 0}, {0x548e, 0xdd, 0, 0}, {0x548f, 0xea, 0, 0},
 334         {0x5490, 0x1d, 0, 0}, {0x5580, 0x02, 0, 0}, {0x5583, 0x40, 0, 0},
 335         {0x5584, 0x10, 0, 0}, {0x5589, 0x10, 0, 0}, {0x558a, 0x00, 0, 0},
 336         {0x558b, 0xf8, 0, 0}, {0x5800, 0x23, 0, 0}, {0x5801, 0x14, 0, 0},
 337         {0x5802, 0x0f, 0, 0}, {0x5803, 0x0f, 0, 0}, {0x5804, 0x12, 0, 0},
 338         {0x5805, 0x26, 0, 0}, {0x5806, 0x0c, 0, 0}, {0x5807, 0x08, 0, 0},
 339         {0x5808, 0x05, 0, 0}, {0x5809, 0x05, 0, 0}, {0x580a, 0x08, 0, 0},
 340         {0x580b, 0x0d, 0, 0}, {0x580c, 0x08, 0, 0}, {0x580d, 0x03, 0, 0},
 341         {0x580e, 0x00, 0, 0}, {0x580f, 0x00, 0, 0}, {0x5810, 0x03, 0, 0},
 342         {0x5811, 0x09, 0, 0}, {0x5812, 0x07, 0, 0}, {0x5813, 0x03, 0, 0},
 343         {0x5814, 0x00, 0, 0}, {0x5815, 0x01, 0, 0}, {0x5816, 0x03, 0, 0},
 344         {0x5817, 0x08, 0, 0}, {0x5818, 0x0d, 0, 0}, {0x5819, 0x08, 0, 0},
 345         {0x581a, 0x05, 0, 0}, {0x581b, 0x06, 0, 0}, {0x581c, 0x08, 0, 0},
 346         {0x581d, 0x0e, 0, 0}, {0x581e, 0x29, 0, 0}, {0x581f, 0x17, 0, 0},
 347         {0x5820, 0x11, 0, 0}, {0x5821, 0x11, 0, 0}, {0x5822, 0x15, 0, 0},
 348         {0x5823, 0x28, 0, 0}, {0x5824, 0x46, 0, 0}, {0x5825, 0x26, 0, 0},
 349         {0x5826, 0x08, 0, 0}, {0x5827, 0x26, 0, 0}, {0x5828, 0x64, 0, 0},
 350         {0x5829, 0x26, 0, 0}, {0x582a, 0x24, 0, 0}, {0x582b, 0x22, 0, 0},
 351         {0x582c, 0x24, 0, 0}, {0x582d, 0x24, 0, 0}, {0x582e, 0x06, 0, 0},
 352         {0x582f, 0x22, 0, 0}, {0x5830, 0x40, 0, 0}, {0x5831, 0x42, 0, 0},
 353         {0x5832, 0x24, 0, 0}, {0x5833, 0x26, 0, 0}, {0x5834, 0x24, 0, 0},
 354         {0x5835, 0x22, 0, 0}, {0x5836, 0x22, 0, 0}, {0x5837, 0x26, 0, 0},
 355         {0x5838, 0x44, 0, 0}, {0x5839, 0x24, 0, 0}, {0x583a, 0x26, 0, 0},
 356         {0x583b, 0x28, 0, 0}, {0x583c, 0x42, 0, 0}, {0x583d, 0xce, 0, 0},
 357         {0x5025, 0x00, 0, 0}, {0x3a0f, 0x30, 0, 0}, {0x3a10, 0x28, 0, 0},
 358         {0x3a1b, 0x30, 0, 0}, {0x3a1e, 0x26, 0, 0}, {0x3a11, 0x60, 0, 0},
 359         {0x3a1f, 0x14, 0, 0}, {0x3008, 0x02, 0, 0}, {0x3c00, 0x04, 0, 300},
 360 };
 361
 362 static const struct reg_value ov5640_setting_VGA_640_480[] = {
 363         {0x3c07, 0x08, 0, 0},
 364         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 365         {0x3814, 0x31, 0, 0},
 366         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 367         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 368         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 369         {0x3810, 0x00, 0, 0},
 370         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 371         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 372         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 373         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 374         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 375         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 376         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 377         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 378         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 379 };
 380
 381 static const struct reg_value ov5640_setting_XGA_1024_768[] = {
 382         {0x3c07, 0x08, 0, 0},
 383         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 384         {0x3814, 0x31, 0, 0},
 385         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 386         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 387         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 388         {0x3810, 0x00, 0, 0},
 389         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 390         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 391         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 392         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 393         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 394         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 395         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 396         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 397         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 398 };
 399
 400 static const struct reg_value ov5640_setting_QVGA_320_240[] = {
 401         {0x3c07, 0x08, 0, 0},
 402         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 403         {0x3814, 0x31, 0, 0},
 404         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 405         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 406         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 407         {0x3810, 0x00, 0, 0},
 408         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 409         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 410         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 411         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 412         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 413         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 414         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 415         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 416         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 417 };
 418
 419 static const struct reg_value ov5640_setting_QCIF_176_144[] = {
 420         {0x3c07, 0x08, 0, 0},
 421         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 422         {0x3814, 0x31, 0, 0},
 423         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 424         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 425         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 426         {0x3810, 0x00, 0, 0},
 427         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 428         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 429         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 430         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 431         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 432         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 433         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 434         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 435         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 436 };
 437
 438 static const struct reg_value ov5640_setting_NTSC_720_480[] = {
 439         {0x3c07, 0x08, 0, 0},
 440         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 441         {0x3814, 0x31, 0, 0},
 442         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 443         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 444         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 445         {0x3810, 0x00, 0, 0},
 446         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x3c, 0, 0},
 447         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 448         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 449         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 450         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 451         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 452         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 453         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 454         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 455 };
 456
 457 static const struct reg_value ov5640_setting_PAL_720_576[] = {
 458         {0x3c07, 0x08, 0, 0},
 459         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 460         {0x3814, 0x31, 0, 0},
 461         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 462         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 463         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 464         {0x3810, 0x00, 0, 0},
 465         {0x3811, 0x38, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 466         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 467         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 468         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 469         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 470         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 471         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 472         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 473         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 474 };
 475
 476 static const struct reg_value ov5640_setting_720P_1280_720[] = {
 477         {0x3c07, 0x07, 0, 0},
 478         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 479         {0x3814, 0x31, 0, 0},
 480         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 481         {0x3802, 0x00, 0, 0}, {0x3803, 0xfa, 0, 0}, {0x3804, 0x0a, 0, 0},
 482         {0x3805, 0x3f, 0, 0}, {0x3806, 0x06, 0, 0}, {0x3807, 0xa9, 0, 0},
 483         {0x3810, 0x00, 0, 0},
 484         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x04, 0, 0},
 485         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 486         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x02, 0, 0},
 487         {0x3a03, 0xe4, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0xbc, 0, 0},
 488         {0x3a0a, 0x01, 0, 0}, {0x3a0b, 0x72, 0, 0}, {0x3a0e, 0x01, 0, 0},
 489         {0x3a0d, 0x02, 0, 0}, {0x3a14, 0x02, 0, 0}, {0x3a15, 0xe4, 0, 0},
 490         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 491         {0x4407, 0x04, 0, 0}, {0x460b, 0x37, 0, 0}, {0x460c, 0x20, 0, 0},
 492         {0x3824, 0x04, 0, 0}, {0x5001, 0x83, 0, 0},
 493 };
 494
 495 static const struct reg_value ov5640_setting_1080P_1920_1080[] = {
 496         {0x3c07, 0x08, 0, 0},
 497         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 498         {0x3814, 0x11, 0, 0},
 499         {0x3815, 0x11, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 500         {0x3802, 0x00, 0, 0}, {0x3803, 0x00, 0, 0}, {0x3804, 0x0a, 0, 0},
 501         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9f, 0, 0},
 502         {0x3810, 0x00, 0, 0},
 503         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x04, 0, 0},
 504         {0x3618, 0x04, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x21, 0, 0},
 505         {0x3709, 0x12, 0, 0}, {0x370c, 0x00, 0, 0}, {0x3a02, 0x03, 0, 0},
 506         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 507         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 508         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 509         {0x4001, 0x02, 0, 0}, {0x4004, 0x06, 0, 0},
 510         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 511         {0x3824, 0x02, 0, 0}, {0x5001, 0x83, 0, 0},
 512         {0x3c07, 0x07, 0, 0}, {0x3c08, 0x00, 0, 0},
 513         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 514         {0x3800, 0x01, 0, 0}, {0x3801, 0x50, 0, 0}, {0x3802, 0x01, 0, 0},
 515         {0x3803, 0xb2, 0, 0}, {0x3804, 0x08, 0, 0}, {0x3805, 0xef, 0, 0},
 516         {0x3806, 0x05, 0, 0}, {0x3807, 0xf1, 0, 0},
 517         {0x3612, 0x2b, 0, 0}, {0x3708, 0x64, 0, 0},
 518         {0x3a02, 0x04, 0, 0}, {0x3a03, 0x60, 0, 0}, {0x3a08, 0x01, 0, 0},
 519         {0x3a09, 0x50, 0, 0}, {0x3a0a, 0x01, 0, 0}, {0x3a0b, 0x18, 0, 0},
 520         {0x3a0e, 0x03, 0, 0}, {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x04, 0, 0},
 521         {0x3a15, 0x60, 0, 0}, {0x4407, 0x04, 0, 0},
 522         {0x460b, 0x37, 0, 0}, {0x460c, 0x20, 0, 0}, {0x3824, 0x04, 0, 0},
 523         {0x4005, 0x1a, 0, 0},
 524 };
 525
 526 static const struct reg_value ov5640_setting_QSXGA_2592_1944[] = {
 527         {0x3c07, 0x08, 0, 0},
 528         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 529         {0x3814, 0x11, 0, 0},
 530         {0x3815, 0x11, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 531         {0x3802, 0x00, 0, 0}, {0x3803, 0x00, 0, 0}, {0x3804, 0x0a, 0, 0},
 532         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9f, 0, 0},
 533         {0x3810, 0x00, 0, 0},
 534         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x04, 0, 0},
 535         {0x3618, 0x04, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x21, 0, 0},
 536         {0x3709, 0x12, 0, 0}, {0x370c, 0x00, 0, 0}, {0x3a02, 0x03, 0, 0},
 537         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 538         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 539         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 540         {0x4001, 0x02, 0, 0}, {0x4004, 0x06, 0, 0},
 541         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 542         {0x3824, 0x02, 0, 0}, {0x5001, 0x83, 0, 70},
 543 };
 544
 545 /* power-on sensor init reg table */
 546 static const struct ov5640_mode_info ov5640_mode_init_data = {
 547         0, SUBSAMPLING, 640, 1896, 480, 984,
 548         ov5640_init_setting_30fps_VGA,
 549         ARRAY_SIZE(ov5640_init_setting_30fps_VGA),
 550         OV5640_30_FPS,
 551 };
 552
 553 static const struct ov5640_mode_info
 554 ov5640_mode_data[OV5640_NUM_MODES] = {
 555         {OV5640_MODE_QCIF_176_144, SUBSAMPLING,
 556          176, 1896, 144, 984,
 557          ov5640_setting_QCIF_176_144,
 558          ARRAY_SIZE(ov5640_setting_QCIF_176_144),
 559          OV5640_30_FPS},
 560         {OV5640_MODE_QVGA_320_240, SUBSAMPLING,
 561          320, 1896, 240, 984,
 562          ov5640_setting_QVGA_320_240,
 563          ARRAY_SIZE(ov5640_setting_QVGA_320_240),
 564          OV5640_30_FPS},
 565         {OV5640_MODE_VGA_640_480, SUBSAMPLING,
 566          640, 1896, 480, 1080,
 567          ov5640_setting_VGA_640_480,
 568          ARRAY_SIZE(ov5640_setting_VGA_640_480),
 569          OV5640_60_FPS},
 570         {OV5640_MODE_NTSC_720_480, SUBSAMPLING,
 571          720, 1896, 480, 984,
 572          ov5640_setting_NTSC_720_480,
 573          ARRAY_SIZE(ov5640_setting_NTSC_720_480),
 574         OV5640_30_FPS},
 575         {OV5640_MODE_PAL_720_576, SUBSAMPLING,
 576          720, 1896, 576, 984,
 577          ov5640_setting_PAL_720_576,
 578          ARRAY_SIZE(ov5640_setting_PAL_720_576),
 579          OV5640_30_FPS},
 580         {OV5640_MODE_XGA_1024_768, SUBSAMPLING,
 581          1024, 1896, 768, 1080,
 582          ov5640_setting_XGA_1024_768,
 583          ARRAY_SIZE(ov5640_setting_XGA_1024_768),
 584          OV5640_30_FPS},
 585         {OV5640_MODE_720P_1280_720, SUBSAMPLING,
 586          1280, 1892, 720, 740,
 587          ov5640_setting_720P_1280_720,
 588          ARRAY_SIZE(ov5640_setting_720P_1280_720),
 589          OV5640_30_FPS},
 590         {OV5640_MODE_1080P_1920_1080, SCALING,
 591          1920, 2500, 1080, 1120,
 592          ov5640_setting_1080P_1920_1080,
 593          ARRAY_SIZE(ov5640_setting_1080P_1920_1080),
 594          OV5640_30_FPS},
 595         {OV5640_MODE_QSXGA_2592_1944, SCALING,
 596          2592, 2844, 1944, 1968,
 597          ov5640_setting_QSXGA_2592_1944,
 598          ARRAY_SIZE(ov5640_setting_QSXGA_2592_1944),
 599          OV5640_15_FPS},
 600 };
 601
 602 static int ov5640_init_slave_id(struct ov5640_dev *sensor)
 603 {
 604         struct i2c_client *client = sensor->i2c_client;
 605         struct i2c_msg msg;
 606         u8 buf[3];
 607         int ret;
 608
 609         if (client->addr == OV5640_DEFAULT_SLAVE_ID)
 610                 return 0;
 611
 612         buf[0] = OV5640_REG_SLAVE_ID >> 8;
 613         buf[1] = OV5640_REG_SLAVE_ID & 0xff;
 614         buf[2] = client->addr << 1;
 615
 616         msg.addr = OV5640_DEFAULT_SLAVE_ID;
 617         msg.flags = 0;
 618         msg.buf = buf;
 619         msg.len = sizeof(buf);
 620
 621         ret = i2c_transfer(client->adapter, &msg, 1);
 622         if (ret < 0) {
 623                 dev_err(&client->dev, "%s: failed with %d\n", __func__, ret);
 624                 return ret;
 625         }
 626
 627         return 0;
 628 }
 629
 630 static int ov5640_write_reg(struct ov5640_dev *sensor, u16 reg, u8 val)
 631 {
 632         struct i2c_client *client = sensor->i2c_client;
 633         struct i2c_msg msg;
 634         u8 buf[3];
 635         int ret;
 636
 637         buf[0] = reg >> 8;
 638         buf[1] = reg & 0xff;
 639         buf[2] = val;
 640
 641         msg.addr = client->addr;
 642         msg.flags = client->flags;
 643         msg.buf = buf;
 644         msg.len = sizeof(buf);
 645
 646         ret = i2c_transfer(client->adapter, &msg, 1);
 647         if (ret < 0) {
 648                 dev_err(&client->dev, "%s: error: reg=%x, val=%x\n",
 649                         __func__, reg, val);
 650                 return ret;
 651         }
 652
 653         return 0;
 654 }
 655
 656 static int ov5640_read_reg(struct ov5640_dev *sensor, u16 reg, u8 *val)
 657 {
 658         struct i2c_client *client = sensor->i2c_client;
 659         struct i2c_msg msg[2];
 660         u8 buf[2];
 661         int ret;
 662
 663         buf[0] = reg >> 8;
 664         buf[1] = reg & 0xff;
 665
 666         msg[0].addr = client->addr;
 667         msg[0].flags = client->flags;
 668         msg[0].buf = buf;
 669         msg[0].len = sizeof(buf);
 670
 671         msg[1].addr = client->addr;
 672         msg[1].flags = client->flags | I2C_M_RD;
 673         msg[1].buf = buf;
 674         msg[1].len = 1;
 675
 676         ret = i2c_transfer(client->adapter, msg, 2);
 677         if (ret < 0) {
 678                 dev_err(&client->dev, "%s: error: reg=%x\n",
 679                         __func__, reg);
 680                 return ret;
 681         }
 682
 683         *val = buf[0];
 684         return 0;
 685 }
 686
 687 static int ov5640_read_reg16(struct ov5640_dev *sensor, u16 reg, u16 *val)
 688 {
 689         u8 hi, lo;
 690         int ret;
 691
 692         ret = ov5640_read_reg(sensor, reg, &hi);
 693         if (ret)
 694                 return ret;
 695         ret = ov5640_read_reg(sensor, reg + 1, &lo);
 696         if (ret)
 697                 return ret;
 698
 699         *val = ((u16)hi << 8) | (u16)lo;
 700         return 0;
 701 }
 702
 703 static int ov5640_write_reg16(struct ov5640_dev *sensor, u16 reg, u16 val)
 704 {
 705         int ret;
 706
 707         ret = ov5640_write_reg(sensor, reg, val >> 8);
 708         if (ret)
 709                 return ret;
 710
 711         return ov5640_write_reg(sensor, reg + 1, val & 0xff);
 712 }
 713
 714 static int ov5640_mod_reg(struct ov5640_dev *sensor, u16 reg,
 715                           u8 mask, u8 val)
 716 {
 717         u8 readval;
 718         int ret;
 719
 720         ret = ov5640_read_reg(sensor, reg, &readval);
 721         if (ret)
 722                 return ret;
 723
 724         readval &= ~mask;
 725         val &= mask;
 726         val |= readval;
 727
 728         return ov5640_write_reg(sensor, reg, val);
 729 }
 730
 731 /*
 732  * After trying the various combinations, reading various
 733  * documentations spread around the net, and from the various
 734  * feedback, the clock tree is probably as follows:
 735  *
 736  *   +--------------+
 737  *   |  Ext. Clock  |
 738  *   +-+------------+
 739  *     |  +----------+
 740  *     +->|   PLL1   | - reg 0x3036, for the multiplier
 741  *        +-+--------+ - reg 0x3037, bits 0-3 for the pre-divider
 742  *          |  +--------------+
 743  *          +->| System Clock |  - reg 0x3035, bits 4-7
 744  *             +-+------------+
 745  *               |  +--------------+
 746  *               +->| MIPI Divider | - reg 0x3035, bits 0-3
 747  *               |  +-+------------+
 748  *               |    +----------------> MIPI SCLK
 749  *               |    +  +-----+
 750  *               |    +->| / 2 |-------> MIPI BIT CLK
 751  *               |       +-----+
 752  *               |  +--------------+
 753  *               +->| PLL Root Div | - reg 0x3037, bit 4
 754  *                  +-+------------+
 755  *                    |  +---------+
 756  *                    +->| Bit Div | - reg 0x3034, bits 0-3
 757  *                       +-+-------+
 758  *                         |  +-------------+
 759  *                         +->| SCLK Div    | - reg 0x3108, bits 0-1
 760  *                         |  +-+-----------+
 761  *                         |    +---------------> SCLK
 762  *                         |  +-------------+
 763  *                         +->| SCLK 2X Div | - reg 0x3108, bits 2-3
 764  *                         |  +-+-----------+
 765  *                         |    +---------------> SCLK 2X
 766  *                         |  +-------------+
 767  *                         +->| PCLK Div    | - reg 0x3108, bits 4-5
 768  *                            ++------------+
 769  *                             +  +-----------+
 770  *                             +->|   P_DIV   | - reg 0x3035, bits 0-3
 771  *                                +-----+-----+
 772  *                                       +------------> PCLK
 773  *
 774  * This is deviating from the datasheet at least for the register
 775  * 0x3108, since it's said here that the PCLK would be clocked from
 776  * the PLL.
 777  *
 778  * There seems to be also (unverified) constraints:
 779  *  - the PLL pre-divider output rate should be in the 4-27MHz range
 780  *  - the PLL multiplier output rate should be in the 500-1000MHz range
 781  *  - PCLK >= SCLK * 2 in YUV, >= SCLK in Raw or JPEG
 782  *
 783  * In the two latter cases, these constraints are met since our
 784  * factors are hardcoded. If we were to change that, we would need to
 785  * take this into account. The only varying parts are the PLL
 786  * multiplier and the system clock divider, which are shared between
 787  * all these clocks so won't cause any issue.
 788  */
 789
 790 /*
 791  * This is supposed to be ranging from 1 to 8, but the value is always
 792  * set to 3 in the vendor kernels.
 793  */
 794 #define OV5640_PLL_PREDIV       3
 795
 796 #define OV5640_PLL_MULT_MIN     4
 797 #define OV5640_PLL_MULT_MAX     252
 798
 799 /*
 800  * This is supposed to be ranging from 1 to 16, but the value is
 801  * always set to either 1 or 2 in the vendor kernels.
 802  */
 803 #define OV5640_SYSDIV_MIN       1
 804 #define OV5640_SYSDIV_MAX       16
 805
 806 /*
 807  * Hardcode these values for scaler and non-scaler modes.
 808  * FIXME: to be re-calcualted for 1 data lanes setups
 809  */
 810 #define OV5640_MIPI_DIV_PCLK    2
 811 #define OV5640_MIPI_DIV_SCLK    1
 812
 813 /*
 814  * This is supposed to be ranging from 1 to 2, but the value is always
 815  * set to 2 in the vendor kernels.
 816  */
 817 #define OV5640_PLL_ROOT_DIV                     2
 818 #define OV5640_PLL_CTRL3_PLL_ROOT_DIV_2         BIT(4)
 819
 820 /*
 821  * We only supports 8-bit formats at the moment
 822  */
 823 #define OV5640_BIT_DIV                          2
 824 #define OV5640_PLL_CTRL0_MIPI_MODE_8BIT         0x08
 825
 826 /*
 827  * This is supposed to be ranging from 1 to 8, but the value is always
 828  * set to 2 in the vendor kernels.
 829  */
 830 #define OV5640_SCLK_ROOT_DIV    2
 831
 832 /*
 833  * This is hardcoded so that the consistency is maintained between SCLK and
 834  * SCLK 2x.
 835  */
 836 #define OV5640_SCLK2X_ROOT_DIV (OV5640_SCLK_ROOT_DIV / 2)
 837
 838 /*
 839  * This is supposed to be ranging from 1 to 8, but the value is always
 840  * set to 1 in the vendor kernels.
 841  */
 842 #define OV5640_PCLK_ROOT_DIV                    1
 843 #define OV5640_PLL_SYS_ROOT_DIVIDER_BYPASS      0x00
 844
 845 static unsigned long ov5640_compute_sys_clk(struct ov5640_dev *sensor,
 846                                             u8 pll_prediv, u8 pll_mult,
 847                                             u8 sysdiv)
 848 {
 849         unsigned long sysclk = sensor->xclk_freq / pll_prediv * pll_mult;
 850
 851         /* PLL1 output cannot exceed 1GHz. */
 852         if (sysclk / 1000000 > 1000)
 853                 return 0;
 854
 855         return sysclk / sysdiv;
 856 }
 857
 858 static unsigned long ov5640_calc_sys_clk(struct ov5640_dev *sensor,
 859                                          unsigned long rate,
 860                                          u8 *pll_prediv, u8 *pll_mult,
 861                                          u8 *sysdiv)
 862 {
 863         unsigned long best = ~0;
 864         u8 best_sysdiv = 1, best_mult = 1;
 865         u8 _sysdiv, _pll_mult;
 866
 867         for (_sysdiv = OV5640_SYSDIV_MIN;
 868              _sysdiv <= OV5640_SYSDIV_MAX;
 869              _sysdiv++) {
 870                 for (_pll_mult = OV5640_PLL_MULT_MIN;
 871                      _pll_mult <= OV5640_PLL_MULT_MAX;
 872                      _pll_mult++) {
 873                         unsigned long _rate;
 874
 875                         /*
 876                          * The PLL multiplier cannot be odd if above
 877                          * 127.
 878                          */
 879                         if (_pll_mult > 127 && (_pll_mult % 2))
 880                                 continue;
 881
 882                         _rate = ov5640_compute_sys_clk(sensor,
 883                                                        OV5640_PLL_PREDIV,
 884                                                        _pll_mult, _sysdiv);
 885
 886                         /*
 887                          * We have reached the maximum allowed PLL1 output,
 888                          * increase sysdiv.
 889                          */
 890                         if (!_rate)
 891                                 break;
 892
 893                         /*
 894                          * Prefer rates above the expected clock rate than
 895                          * below, even if that means being less precise.
 896                          */
 897                         if (_rate < rate)
 898                                 continue;
 899
 900                         if (abs(rate - _rate) < abs(rate - best)) {
 901                                 best = _rate;
 902                                 best_sysdiv = _sysdiv;
 903                                 best_mult = _pll_mult;
 904                         }
 905
 906                         if (_rate == rate)
 907                                 goto out;
 908                 }
 909         }
 910
 911 out:
 912         *sysdiv = best_sysdiv;
 913         *pll_prediv = OV5640_PLL_PREDIV;
 914         *pll_mult = best_mult;
 915
 916         return best;
 917 }
 918
 919 /*
 920  * ov5640_set_mipi_pclk() - Calculate the clock tree configuration values
 921  *                          for the MIPI CSI-2 output.
 922  *
 923  * @rate: The requested bandwidth per lane in bytes per second.
 924  *        'Bandwidth Per Lane' is calculated as:
 925  *        bpl = HTOT * VTOT * FPS * bpp / num_lanes;
 926  *
 927  * This function use the requested bandwidth to calculate:
 928  * - sample_rate = bpl / (bpp / num_lanes);
 929  *               = bpl / (PLL_RDIV * BIT_DIV * PCLK_DIV * MIPI_DIV / num_lanes);
 930  *
 931  * - mipi_sclk   = bpl / MIPI_DIV / 2; ( / 2 is for CSI-2 DDR)
 932  *
 933  * with these fixed parameters:
 934  *      PLL_RDIV        = 2;
 935  *      BIT_DIVIDER     = 2; (MIPI_BIT_MODE == 8 ? 2 : 2,5);
 936  *      PCLK_DIV        = 1;
 937  *
 938  * The MIPI clock generation differs for modes that use the scaler and modes
 939  * that do not. In case the scaler is in use, the MIPI_SCLK generates the MIPI
 940  * BIT CLk, and thus:
 941  *
 942  * - mipi_sclk = bpl / MIPI_DIV / 2;
 943  *   MIPI_DIV = 1;
 944  *
 945  * For modes that do not go through the scaler, the MIPI BIT CLOCK is generated
 946  * from the pixel clock, and thus:
 947  *
 948  * - sample_rate = bpl / (bpp / num_lanes);
 949  *               = bpl / (2 * 2 * 1 * MIPI_DIV / num_lanes);
 950  *               = bpl / (4 * MIPI_DIV / num_lanes);
 951  * - MIPI_DIV    = bpp / (4 * num_lanes);
 952  *
 953  * FIXME: this have been tested with 16bpp and 2 lanes setup only.
 954  * MIPI_DIV is fixed to value 2, but it -might- be changed according to the
 955  * above formula for setups with 1 lane or image formats with different bpp.
 956  *
 957  * FIXME: this deviates from the sensor manual documentation which is quite
 958  * thin on the MIPI clock tree generation part.
 959  */
 960 static int ov5640_set_mipi_pclk(struct ov5640_dev *sensor,
 961                                 unsigned long rate)
 962 {
 963         const struct ov5640_mode_info *mode = sensor->current_mode;
 964         u8 prediv, mult, sysdiv;
 965         u8 mipi_div;
 966         int ret;
 967
 968         /*
 969          * 1280x720 is reported to use 'SUBSAMPLING' only,
 970          * but according to the sensor manual it goes through the
 971          * scaler before subsampling.
 972          */
 973         if (mode->dn_mode == SCALING ||
 974            (mode->id == OV5640_MODE_720P_1280_720))
 975                 mipi_div = OV5640_MIPI_DIV_SCLK;
 976         else
 977                 mipi_div = OV5640_MIPI_DIV_PCLK;
 978
 979         ov5640_calc_sys_clk(sensor, rate, &prediv, &mult, &sysdiv);
 980
 981         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL0,
 982                              0x0f, OV5640_PLL_CTRL0_MIPI_MODE_8BIT);
 983
 984         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL1,
 985                              0xff, sysdiv << 4 | mipi_div);
 986         if (ret)
 987                 return ret;
 988
 989         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL2, 0xff, mult);
 990         if (ret)
 991                 return ret;
 992
 993         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL3,
 994                              0x1f, OV5640_PLL_CTRL3_PLL_ROOT_DIV_2 | prediv);
 995         if (ret)
 996                 return ret;
 997
 998         return ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER,
 999                               0x30, OV5640_PLL_SYS_ROOT_DIVIDER_BYPASS);
1000 }
1001
1002 static unsigned long ov5640_calc_pclk(struct ov5640_dev *sensor,
1003                                       unsigned long rate,
1004                                       u8 *pll_prediv, u8 *pll_mult, u8 *sysdiv,
1005                                       u8 *pll_rdiv, u8 *bit_div, u8 *pclk_div)
1006 {
1007         unsigned long _rate = rate * OV5640_PLL_ROOT_DIV * OV5640_BIT_DIV *
1008                                 OV5640_PCLK_ROOT_DIV;
1009
1010         _rate = ov5640_calc_sys_clk(sensor, _rate, pll_prediv, pll_mult,
1011                                     sysdiv);
1012         *pll_rdiv = OV5640_PLL_ROOT_DIV;
1013         *bit_div = OV5640_BIT_DIV;
1014         *pclk_div = OV5640_PCLK_ROOT_DIV;
1015
1016         return _rate / *pll_rdiv / *bit_div / *pclk_div;
1017 }
1018
1019 static int ov5640_set_dvp_pclk(struct ov5640_dev *sensor, unsigned long rate)
1020 {
1021         u8 prediv, mult, sysdiv, pll_rdiv, bit_div, pclk_div;
1022         int ret;
1023
1024         ov5640_calc_pclk(sensor, rate, &prediv, &mult, &sysdiv, &pll_rdiv,
1025                          &bit_div, &pclk_div);
1026
1027         if (bit_div == 2)
1028                 bit_div = 8;
1029
1030         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL0,
1031                              0x0f, bit_div);
1032         if (ret)
1033                 return ret;
1034
1035         /*
1036          * We need to set sysdiv according to the clock, and to clear
1037          * the MIPI divider.
1038          */
1039         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL1,
1040                              0xff, sysdiv << 4);
1041         if (ret)
1042                 return ret;
1043
1044         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL2,
1045                              0xff, mult);
1046         if (ret)
1047                 return ret;
1048
1049         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL3,
1050                              0x1f, prediv | ((pll_rdiv - 1) << 4));
1051         if (ret)
1052                 return ret;
1053
1054         return ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, 0x30,
1055                               (ilog2(pclk_div) << 4));
1056 }
1057
1058 /* set JPEG framing sizes */
1059 static int ov5640_set_jpeg_timings(struct ov5640_dev *sensor,
1060                                    const struct ov5640_mode_info *mode)
1061 {
1062         int ret;
1063
1064         /*
1065          * compression mode 3 timing
1066          *
1067          * Data is transmitted with programmable width (VFIFO_HSIZE).
1068          * No padding done. Last line may have less data. Varying
1069          * number of lines per frame, depending on amount of data.
1070          */
1071         ret = ov5640_mod_reg(sensor, OV5640_REG_JPG_MODE_SELECT, 0x7, 0x3);
1072         if (ret < 0)
1073                 return ret;
1074
1075         ret = ov5640_write_reg16(sensor, OV5640_REG_VFIFO_HSIZE, mode->hact);
1076         if (ret < 0)
1077                 return ret;
1078
1079         return ov5640_write_reg16(sensor, OV5640_REG_VFIFO_VSIZE, mode->vact);
1080 }
1081
1082 /* download ov5640 settings to sensor through i2c */
1083 static int ov5640_set_timings(struct ov5640_dev *sensor,
1084                               const struct ov5640_mode_info *mode)
1085 {
1086         int ret;
1087
1088         if (sensor->fmt.code == MEDIA_BUS_FMT_JPEG_1X8) {
1089                 ret = ov5640_set_jpeg_timings(sensor, mode);
1090                 if (ret < 0)
1091                         return ret;
1092         }
1093
1094         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_DVPHO, mode->hact);
1095         if (ret < 0)
1096                 return ret;
1097
1098         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_DVPVO, mode->vact);
1099         if (ret < 0)
1100                 return ret;
1101
1102         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_HTS, mode->htot);
1103         if (ret < 0)
1104                 return ret;
1105
1106         return ov5640_write_reg16(sensor, OV5640_REG_TIMING_VTS, mode->vtot);
1107 }
1108
1109 static int ov5640_load_regs(struct ov5640_dev *sensor,
1110                             const struct ov5640_mode_info *mode)
1111 {
1112         const struct reg_value *regs = mode->reg_data;
1113         unsigned int i;
1114         u32 delay_ms;
1115         u16 reg_addr;
1116         u8 mask, val;
1117         int ret = 0;
1118
1119         for (i = 0; i < mode->reg_data_size; ++i, ++regs) {
1120                 delay_ms = regs->delay_ms;
1121                 reg_addr = regs->reg_addr;
1122                 val = regs->val;
1123                 mask = regs->mask;
1124
1125                 /* remain in power down mode for DVP */
1126                 if (regs->reg_addr == OV5640_REG_SYS_CTRL0 &&
1127                     val == OV5640_REG_SYS_CTRL0_SW_PWUP &&
1128                     sensor->ep.bus_type != V4L2_MBUS_CSI2_DPHY)
1129                         continue;
1130
1131                 if (mask)
1132                         ret = ov5640_mod_reg(sensor, reg_addr, mask, val);
1133                 else
1134                         ret = ov5640_write_reg(sensor, reg_addr, val);
1135                 if (ret)
1136                         break;
1137
1138                 if (delay_ms)
1139                         usleep_range(1000 * delay_ms, 1000 * delay_ms + 100);
1140         }
1141
1142         return ov5640_set_timings(sensor, mode);
1143 }
1144
1145 static int ov5640_set_autoexposure(struct ov5640_dev *sensor, bool on)
1146 {
1147         return ov5640_mod_reg(sensor, OV5640_REG_AEC_PK_MANUAL,
1148                               BIT(0), on ? 0 : BIT(0));
1149 }
1150
1151 /* read exposure, in number of line periods */
1152 static int ov5640_get_exposure(struct ov5640_dev *sensor)
1153 {
1154         int exp, ret;
1155         u8 temp;
1156
1157         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_HI, &temp);
1158         if (ret)
1159                 return ret;
1160         exp = ((int)temp & 0x0f) << 16;
1161         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_MED, &temp);
1162         if (ret)
1163                 return ret;
1164         exp |= ((int)temp << 8);
1165         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_LO, &temp);
1166         if (ret)
1167                 return ret;
1168         exp |= (int)temp;
1169
1170         return exp >> 4;
1171 }
1172
1173 /* write exposure, given number of line periods */
1174 static int ov5640_set_exposure(struct ov5640_dev *sensor, u32 exposure)
1175 {
1176         int ret;
1177
1178         exposure <<= 4;
1179
1180         ret = ov5640_write_reg(sensor,
1181                                OV5640_REG_AEC_PK_EXPOSURE_LO,
1182                                exposure & 0xff);
1183         if (ret)
1184                 return ret;
1185         ret = ov5640_write_reg(sensor,
1186                                OV5640_REG_AEC_PK_EXPOSURE_MED,
1187                                (exposure >> 8) & 0xff);
1188         if (ret)
1189                 return ret;
1190         return ov5640_write_reg(sensor,
1191                                 OV5640_REG_AEC_PK_EXPOSURE_HI,
1192                                 (exposure >> 16) & 0x0f);
1193 }
1194
1195 static int ov5640_get_gain(struct ov5640_dev *sensor)
1196 {
1197         u16 gain;
1198         int ret;
1199
1200         ret = ov5640_read_reg16(sensor, OV5640_REG_AEC_PK_REAL_GAIN, &gain);
1201         if (ret)
1202                 return ret;
1203
1204         return gain & 0x3ff;
1205 }
1206
1207 static int ov5640_set_gain(struct ov5640_dev *sensor, int gain)
1208 {
1209         return ov5640_write_reg16(sensor, OV5640_REG_AEC_PK_REAL_GAIN,
1210                                   (u16)gain & 0x3ff);
1211 }
1212
1213 static int ov5640_set_autogain(struct ov5640_dev *sensor, bool on)
1214 {
1215         return ov5640_mod_reg(sensor, OV5640_REG_AEC_PK_MANUAL,
1216                               BIT(1), on ? 0 : BIT(1));
1217 }
1218
1219 static int ov5640_set_stream_dvp(struct ov5640_dev *sensor, bool on)
1220 {
1221         return ov5640_write_reg(sensor, OV5640_REG_SYS_CTRL0, on ?
1222                                 OV5640_REG_SYS_CTRL0_SW_PWUP :
1223                                 OV5640_REG_SYS_CTRL0_SW_PWDN);
1224 }
1225
1226 static int ov5640_set_stream_mipi(struct ov5640_dev *sensor, bool on)
1227 {
1228         int ret;
1229
1230         /*
1231          * Enable/disable the MIPI interface
1232          *
1233          * 0x300e = on ? 0x45 : 0x40
1234          *
1235          * FIXME: the sensor manual (version 2.03) reports
1236          * [7:5] = 000  : 1 data lane mode
1237          * [7:5] = 001  : 2 data lanes mode
1238          * But this settings do not work, while the following ones
1239          * have been validated for 2 data lanes mode.
1240          *
1241          * [7:5] = 010  : 2 data lanes mode
1242          * [4] = 0      : Power up MIPI HS Tx
1243          * [3] = 0      : Power up MIPI LS Rx
1244          * [2] = 1/0    : MIPI interface enable/disable
1245          * [1:0] = 01/00: FIXME: 'debug'
1246          */
1247         ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00,
1248                                on ? 0x45 : 0x40);
1249         if (ret)
1250                 return ret;
1251
1252         return ov5640_write_reg(sensor, OV5640_REG_FRAME_CTRL01,
1253                                 on ? 0x00 : 0x0f);
1254 }
1255
1256 static int ov5640_get_sysclk(struct ov5640_dev *sensor)
1257 {
1258          /* calculate sysclk */
1259         u32 xvclk = sensor->xclk_freq / 10000;
1260         u32 multiplier, prediv, VCO, sysdiv, pll_rdiv;
1261         u32 sclk_rdiv_map[] = {1, 2, 4, 8};
1262         u32 bit_div2x = 1, sclk_rdiv, sysclk;
1263         u8 temp1, temp2;
1264         int ret;
1265
1266         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL0, &temp1);
1267         if (ret)
1268                 return ret;
1269         temp2 = temp1 & 0x0f;
1270         if (temp2 == 8 || temp2 == 10)
1271                 bit_div2x = temp2 / 2;
1272
1273         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL1, &temp1);
1274         if (ret)
1275                 return ret;
1276         sysdiv = temp1 >> 4;
1277         if (sysdiv == 0)
1278                 sysdiv = 16;
1279
1280         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL2, &temp1);
1281         if (ret)
1282                 return ret;
1283         multiplier = temp1;
1284
1285         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL3, &temp1);
1286         if (ret)
1287                 return ret;
1288         prediv = temp1 & 0x0f;
1289         pll_rdiv = ((temp1 >> 4) & 0x01) + 1;
1290
1291         ret = ov5640_read_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, &temp1);
1292         if (ret)
1293                 return ret;
1294         temp2 = temp1 & 0x03;
1295         sclk_rdiv = sclk_rdiv_map[temp2];
1296
1297         if (!prediv || !sysdiv || !pll_rdiv || !bit_div2x)
1298                 return -EINVAL;
1299
1300         VCO = xvclk * multiplier / prediv;
1301
1302         sysclk = VCO / sysdiv / pll_rdiv * 2 / bit_div2x / sclk_rdiv;
1303
1304         return sysclk;
1305 }
1306
1307 static int ov5640_set_night_mode(struct ov5640_dev *sensor)
1308 {
1309          /* read HTS from register settings */
1310         u8 mode;
1311         int ret;
1312
1313         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_CTRL00, &mode);
1314         if (ret)
1315                 return ret;
1316         mode &= 0xfb;
1317         return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL00, mode);
1318 }
1319
1320 static int ov5640_get_hts(struct ov5640_dev *sensor)
1321 {
1322         /* read HTS from register settings */
1323         u16 hts;
1324         int ret;
1325
1326         ret = ov5640_read_reg16(sensor, OV5640_REG_TIMING_HTS, &hts);
1327         if (ret)
1328                 return ret;
1329         return hts;
1330 }
1331
1332 static int ov5640_get_vts(struct ov5640_dev *sensor)
1333 {
1334         u16 vts;
1335         int ret;
1336
1337         ret = ov5640_read_reg16(sensor, OV5640_REG_TIMING_VTS, &vts);
1338         if (ret)
1339                 return ret;
1340         return vts;
1341 }
1342
1343 static int ov5640_set_vts(struct ov5640_dev *sensor, int vts)
1344 {
1345         return ov5640_write_reg16(sensor, OV5640_REG_TIMING_VTS, vts);
1346 }
1347
1348 static int ov5640_get_light_freq(struct ov5640_dev *sensor)
1349 {
1350         /* get banding filter value */
1351         int ret, light_freq = 0;
1352         u8 temp, temp1;
1353
1354         ret = ov5640_read_reg(sensor, OV5640_REG_HZ5060_CTRL01, &temp);
1355         if (ret)
1356                 return ret;
1357
1358         if (temp & 0x80) {
1359                 /* manual */
1360                 ret = ov5640_read_reg(sensor, OV5640_REG_HZ5060_CTRL00,
1361                                       &temp1);
1362                 if (ret)
1363                         return ret;
1364                 if (temp1 & 0x04) {
1365                         /* 50Hz */
1366                         light_freq = 50;
1367                 } else {
1368                         /* 60Hz */
1369                         light_freq = 60;
1370                 }
1371         } else {
1372                 /* auto */
1373                 ret = ov5640_read_reg(sensor, OV5640_REG_SIGMADELTA_CTRL0C,
1374                                       &temp1);
1375                 if (ret)
1376                         return ret;
1377
1378                 if (temp1 & 0x01) {
1379                         /* 50Hz */
1380                         light_freq = 50;
1381                 } else {
1382                         /* 60Hz */
1383                 }
1384         }
1385
1386         return light_freq;
1387 }
1388
1389 static int ov5640_set_bandingfilter(struct ov5640_dev *sensor)
1390 {
1391         u32 band_step60, max_band60, band_step50, max_band50, prev_vts;
1392         int ret;
1393
1394         /* read preview PCLK */
1395         ret = ov5640_get_sysclk(sensor);
1396         if (ret < 0)
1397                 return ret;
1398         if (ret == 0)
1399                 return -EINVAL;
1400         sensor->prev_sysclk = ret;
1401         /* read preview HTS */
1402         ret = ov5640_get_hts(sensor);
1403         if (ret < 0)
1404                 return ret;
1405         if (ret == 0)
1406                 return -EINVAL;
1407         sensor->prev_hts = ret;
1408
1409         /* read preview VTS */
1410         ret = ov5640_get_vts(sensor);
1411         if (ret < 0)
1412                 return ret;
1413         prev_vts = ret;
1414
1415         /* calculate banding filter */
1416         /* 60Hz */
1417         band_step60 = sensor->prev_sysclk * 100 / sensor->prev_hts * 100 / 120;
1418         ret = ov5640_write_reg16(sensor, OV5640_REG_AEC_B60_STEP, band_step60);
1419         if (ret)
1420                 return ret;
1421         if (!band_step60)
1422                 return -EINVAL;
1423         max_band60 = (int)((prev_vts - 4) / band_step60);
1424         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0D, max_band60);
1425         if (ret)
1426                 return ret;
1427
1428         /* 50Hz */
1429         band_step50 = sensor->prev_sysclk * 100 / sensor->prev_hts;
1430         ret = ov5640_write_reg16(sensor, OV5640_REG_AEC_B50_STEP, band_step50);
1431         if (ret)
1432                 return ret;
1433         if (!band_step50)
1434                 return -EINVAL;
1435         max_band50 = (int)((prev_vts - 4) / band_step50);
1436         return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0E, max_band50);
1437 }
1438
1439 static int ov5640_set_ae_target(struct ov5640_dev *sensor, int target)
1440 {
1441         /* stable in high */
1442         u32 fast_high, fast_low;
1443         int ret;
1444
1445         sensor->ae_low = target * 23 / 25;      /* 0.92 */
1446         sensor->ae_high = target * 27 / 25;     /* 1.08 */
1447
1448         fast_high = sensor->ae_high << 1;
1449         if (fast_high > 255)
1450                 fast_high = 255;
1451
1452         fast_low = sensor->ae_low >> 1;
1453
1454         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0F, sensor->ae_high);
1455         if (ret)
1456                 return ret;
1457         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL10, sensor->ae_low);
1458         if (ret)
1459                 return ret;
1460         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1B, sensor->ae_high);
1461         if (ret)
1462                 return ret;
1463         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1E, sensor->ae_low);
1464         if (ret)
1465                 return ret;
1466         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL11, fast_high);
1467         if (ret)
1468                 return ret;
1469         return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1F, fast_low);
1470 }
1471
1472 static int ov5640_get_binning(struct ov5640_dev *sensor)
1473 {
1474         u8 temp;
1475         int ret;
1476
1477         ret = ov5640_read_reg(sensor, OV5640_REG_TIMING_TC_REG21, &temp);
1478         if (ret)
1479                 return ret;
1480
1481         return temp & BIT(0);
1482 }
1483
1484 static int ov5640_set_binning(struct ov5640_dev *sensor, bool enable)
1485 {
1486         int ret;
1487
1488         /*
1489          * TIMING TC REG21:
1490          * - [0]:       Horizontal binning enable
1491          */
1492         ret = ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
1493                              BIT(0), enable ? BIT(0) : 0);
1494         if (ret)
1495                 return ret;
1496         /*
1497          * TIMING TC REG20:
1498          * - [0]:       Undocumented, but hardcoded init sequences
1499          *              are always setting REG21/REG20 bit 0 to same value...
1500          */
1501         return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG20,
1502                               BIT(0), enable ? BIT(0) : 0);
1503 }
1504
1505 static int ov5640_set_virtual_channel(struct ov5640_dev *sensor)
1506 {
1507         struct i2c_client *client = sensor->i2c_client;
1508         u8 temp, channel = virtual_channel;
1509         int ret;
1510
1511         if (channel > 3) {
1512                 dev_err(&client->dev,
1513                         "%s: wrong virtual_channel parameter, expected (0..3), got %d\n",
1514                         __func__, channel);
1515                 return -EINVAL;
1516         }
1517
1518         ret = ov5640_read_reg(sensor, OV5640_REG_DEBUG_MODE, &temp);
1519         if (ret)
1520                 return ret;
1521         temp &= ~(3 << 6);
1522         temp |= (channel << 6);
1523         return ov5640_write_reg(sensor, OV5640_REG_DEBUG_MODE, temp);
1524 }
1525
1526 static const struct ov5640_mode_info *
1527 ov5640_find_mode(struct ov5640_dev *sensor, enum ov5640_frame_rate fr,
1528                  int width, int height, bool nearest)
1529 {
1530         const struct ov5640_mode_info *mode;
1531
1532         mode = v4l2_find_nearest_size(ov5640_mode_data,
1533                                       ARRAY_SIZE(ov5640_mode_data),
1534                                       hact, vact,
1535                                       width, height);
1536
1537         if (!mode ||
1538             (!nearest && (mode->hact != width || mode->vact != height)))
1539                 return NULL;
1540
1541         /* Check to see if the current mode exceeds the max frame rate */
1542         if (ov5640_framerates[fr] > ov5640_framerates[mode->max_fps])
1543                 return NULL;
1544
1545         return mode;
1546 }
1547
1548 static u64 ov5640_calc_pixel_rate(struct ov5640_dev *sensor)
1549 {
1550         u64 rate;
1551
1552         rate = sensor->current_mode->vtot * sensor->current_mode->htot;
1553         rate *= ov5640_framerates[sensor->current_fr];
1554
1555         return rate;
1556 }
1557
1558 /*
1559  * sensor changes between scaling and subsampling, go through
1560  * exposure calculation
1561  */
1562 static int ov5640_set_mode_exposure_calc(struct ov5640_dev *sensor,
1563                                          const struct ov5640_mode_info *mode)
1564 {
1565         u32 prev_shutter, prev_gain16;
1566         u32 cap_shutter, cap_gain16;
1567         u32 cap_sysclk, cap_hts, cap_vts;
1568         u32 light_freq, cap_bandfilt, cap_maxband;
1569         u32 cap_gain16_shutter;
1570         u8 average;
1571         int ret;
1572
1573         if (!mode->reg_data)
1574                 return -EINVAL;
1575
1576         /* read preview shutter */
1577         ret = ov5640_get_exposure(sensor);
1578         if (ret < 0)
1579                 return ret;
1580         prev_shutter = ret;
1581         ret = ov5640_get_binning(sensor);
1582         if (ret < 0)
1583                 return ret;
1584         if (ret && mode->id != OV5640_MODE_720P_1280_720 &&
1585             mode->id != OV5640_MODE_1080P_1920_1080)
1586                 prev_shutter *= 2;
1587
1588         /* read preview gain */
1589         ret = ov5640_get_gain(sensor);
1590         if (ret < 0)
1591                 return ret;
1592         prev_gain16 = ret;
1593
1594         /* get average */
1595         ret = ov5640_read_reg(sensor, OV5640_REG_AVG_READOUT, &average);
1596         if (ret)
1597                 return ret;
1598
1599         /* turn off night mode for capture */
1600         ret = ov5640_set_night_mode(sensor);
1601         if (ret < 0)
1602                 return ret;
1603
1604         /* Write capture setting */
1605         ret = ov5640_load_regs(sensor, mode);
1606         if (ret < 0)
1607                 return ret;
1608
1609         /* read capture VTS */
1610         ret = ov5640_get_vts(sensor);
1611         if (ret < 0)
1612                 return ret;
1613         cap_vts = ret;
1614         ret = ov5640_get_hts(sensor);
1615         if (ret < 0)
1616                 return ret;
1617         if (ret == 0)
1618                 return -EINVAL;
1619         cap_hts = ret;
1620
1621         ret = ov5640_get_sysclk(sensor);
1622         if (ret < 0)
1623                 return ret;
1624         if (ret == 0)
1625                 return -EINVAL;
1626         cap_sysclk = ret;
1627
1628         /* calculate capture banding filter */
1629         ret = ov5640_get_light_freq(sensor);
1630         if (ret < 0)
1631                 return ret;
1632         light_freq = ret;
1633
1634         if (light_freq == 60) {
1635                 /* 60Hz */
1636                 cap_bandfilt = cap_sysclk * 100 / cap_hts * 100 / 120;
1637         } else {
1638                 /* 50Hz */
1639                 cap_bandfilt = cap_sysclk * 100 / cap_hts;
1640         }
1641
1642         if (!sensor->prev_sysclk) {
1643                 ret = ov5640_get_sysclk(sensor);
1644                 if (ret < 0)
1645                         return ret;
1646                 if (ret == 0)
1647                         return -EINVAL;
1648                 sensor->prev_sysclk = ret;
1649         }
1650
1651         if (!cap_bandfilt)
1652                 return -EINVAL;
1653
1654         cap_maxband = (int)((cap_vts - 4) / cap_bandfilt);
1655
1656         /* calculate capture shutter/gain16 */
1657         if (average > sensor->ae_low && average < sensor->ae_high) {
1658                 /* in stable range */
1659                 cap_gain16_shutter =
1660                         prev_gain16 * prev_shutter *
1661                         cap_sysclk / sensor->prev_sysclk *
1662                         sensor->prev_hts / cap_hts *
1663                         sensor->ae_target / average;
1664         } else {
1665                 cap_gain16_shutter =
1666                         prev_gain16 * prev_shutter *
1667                         cap_sysclk / sensor->prev_sysclk *
1668                         sensor->prev_hts / cap_hts;
1669         }
1670
1671         /* gain to shutter */
1672         if (cap_gain16_shutter < (cap_bandfilt * 16)) {
1673                 /* shutter < 1/100 */
1674                 cap_shutter = cap_gain16_shutter / 16;
1675                 if (cap_shutter < 1)
1676                         cap_shutter = 1;
1677
1678                 cap_gain16 = cap_gain16_shutter / cap_shutter;
1679                 if (cap_gain16 < 16)
1680                         cap_gain16 = 16;
1681         } else {
1682                 if (cap_gain16_shutter > (cap_bandfilt * cap_maxband * 16)) {
1683                         /* exposure reach max */
1684                         cap_shutter = cap_bandfilt * cap_maxband;
1685                         if (!cap_shutter)
1686                                 return -EINVAL;
1687
1688                         cap_gain16 = cap_gain16_shutter / cap_shutter;
1689                 } else {
1690                         /* 1/100 < (cap_shutter = n/100) =< max */
1691                         cap_shutter =
1692                                 ((int)(cap_gain16_shutter / 16 / cap_bandfilt))
1693                                 * cap_bandfilt;
1694                         if (!cap_shutter)
1695                                 return -EINVAL;
1696
1697                         cap_gain16 = cap_gain16_shutter / cap_shutter;
1698                 }
1699         }
1700
1701         /* set capture gain */
1702         ret = ov5640_set_gain(sensor, cap_gain16);
1703         if (ret)
1704                 return ret;
1705
1706         /* write capture shutter */
1707         if (cap_shutter > (cap_vts - 4)) {
1708                 cap_vts = cap_shutter + 4;
1709                 ret = ov5640_set_vts(sensor, cap_vts);
1710                 if (ret < 0)
1711                         return ret;
1712         }
1713
1714         /* set exposure */
1715         return ov5640_set_exposure(sensor, cap_shutter);
1716 }
1717
1718 /*
1719  * if sensor changes inside scaling or subsampling
1720  * change mode directly
1721  */
1722 static int ov5640_set_mode_direct(struct ov5640_dev *sensor,
1723                                   const struct ov5640_mode_info *mode)
1724 {
1725         if (!mode->reg_data)
1726                 return -EINVAL;
1727
1728         /* Write capture setting */
1729         return ov5640_load_regs(sensor, mode);
1730 }
1731
1732 static int ov5640_set_mode(struct ov5640_dev *sensor)
1733 {
1734         const struct ov5640_mode_info *mode = sensor->current_mode;
1735         const struct ov5640_mode_info *orig_mode = sensor->last_mode;
1736         enum ov5640_downsize_mode dn_mode, orig_dn_mode;
1737         bool auto_gain = sensor->ctrls.auto_gain->val == 1;
1738         bool auto_exp =  sensor->ctrls.auto_exp->val == V4L2_EXPOSURE_AUTO;
1739         unsigned long rate;
1740         int ret;
1741
1742         dn_mode = mode->dn_mode;
1743         orig_dn_mode = orig_mode->dn_mode;
1744
1745         /* auto gain and exposure must be turned off when changing modes */
1746         if (auto_gain) {
1747                 ret = ov5640_set_autogain(sensor, false);
1748                 if (ret)
1749                         return ret;
1750         }
1751
1752         if (auto_exp) {
1753                 ret = ov5640_set_autoexposure(sensor, false);
1754                 if (ret)
1755                         goto restore_auto_gain;
1756         }
1757
1758         /*
1759          * All the formats we support have 16 bits per pixel, seems to require
1760          * the same rate than YUV, so we can just use 16 bpp all the time.
1761          */
1762         rate = ov5640_calc_pixel_rate(sensor) * 16;
1763         if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY) {
1764                 rate = rate / sensor->ep.bus.mipi_csi2.num_data_lanes;
1765                 ret = ov5640_set_mipi_pclk(sensor, rate);
1766         } else {
1767                 rate = rate / sensor->ep.bus.parallel.bus_width;
1768                 ret = ov5640_set_dvp_pclk(sensor, rate);
1769         }
1770
1771         if (ret < 0)
1772                 return 0;
1773
1774         if ((dn_mode == SUBSAMPLING && orig_dn_mode == SCALING) ||
1775             (dn_mode == SCALING && orig_dn_mode == SUBSAMPLING)) {
1776                 /*
1777                  * change between subsampling and scaling
1778                  * go through exposure calculation
1779                  */
1780                 ret = ov5640_set_mode_exposure_calc(sensor, mode);
1781         } else {
1782                 /*
1783                  * change inside subsampling or scaling
1784                  * download firmware directly
1785                  */
1786                 ret = ov5640_set_mode_direct(sensor, mode);
1787         }
1788         if (ret < 0)
1789                 goto restore_auto_exp_gain;
1790
1791         /* restore auto gain and exposure */
1792         if (auto_gain)
1793                 ov5640_set_autogain(sensor, true);
1794         if (auto_exp)
1795                 ov5640_set_autoexposure(sensor, true);
1796
1797         ret = ov5640_set_binning(sensor, dn_mode != SCALING);
1798         if (ret < 0)
1799                 return ret;
1800         ret = ov5640_set_ae_target(sensor, sensor->ae_target);
1801         if (ret < 0)
1802                 return ret;
1803         ret = ov5640_get_light_freq(sensor);
1804         if (ret < 0)
1805                 return ret;
1806         ret = ov5640_set_bandingfilter(sensor);
1807         if (ret < 0)
1808                 return ret;
1809         ret = ov5640_set_virtual_channel(sensor);
1810         if (ret < 0)
1811                 return ret;
1812
1813         sensor->pending_mode_change = false;
1814         sensor->last_mode = mode;
1815
1816         return 0;
1817
1818 restore_auto_exp_gain:
1819         if (auto_exp)
1820                 ov5640_set_autoexposure(sensor, true);
1821 restore_auto_gain:
1822         if (auto_gain)
1823                 ov5640_set_autogain(sensor, true);
1824
1825         return ret;
1826 }
1827
1828 static int ov5640_set_framefmt(struct ov5640_dev *sensor,
1829                                struct v4l2_mbus_framefmt *format);
1830
1831 /* restore the last set video mode after chip power-on */
1832 static int ov5640_restore_mode(struct ov5640_dev *sensor)
1833 {
1834         int ret;
1835
1836         /* first load the initial register values */
1837         ret = ov5640_load_regs(sensor, &ov5640_mode_init_data);
1838         if (ret < 0)
1839                 return ret;
1840         sensor->last_mode = &ov5640_mode_init_data;
1841
1842         ret = ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, 0x3f,
1843                              (ilog2(OV5640_SCLK2X_ROOT_DIV) << 2) |
1844                              ilog2(OV5640_SCLK_ROOT_DIV));
1845         if (ret)
1846                 return ret;
1847
1848         /* now restore the last capture mode */
1849         ret = ov5640_set_mode(sensor);
1850         if (ret < 0)
1851                 return ret;
1852
1853         return ov5640_set_framefmt(sensor, &sensor->fmt);
1854 }
1855
1856 static void ov5640_power(struct ov5640_dev *sensor, bool enable)
1857 {
1858         gpiod_set_value_cansleep(sensor->pwdn_gpio, enable ? 0 : 1);
1859 }
1860
1861 static void ov5640_reset(struct ov5640_dev *sensor)
1862 {
1863         if (!sensor->reset_gpio)
1864                 return;
1865
1866         gpiod_set_value_cansleep(sensor->reset_gpio, 0);
1867
1868         /* camera power cycle */
1869         ov5640_power(sensor, false);
1870         usleep_range(5000, 10000);
1871         ov5640_power(sensor, true);
1872         usleep_range(5000, 10000);
1873
1874         gpiod_set_value_cansleep(sensor->reset_gpio, 1);
1875         usleep_range(1000, 2000);
1876
1877         gpiod_set_value_cansleep(sensor->reset_gpio, 0);
1878         usleep_range(20000, 25000);
1879 }
1880
1881 static int ov5640_set_power_on(struct ov5640_dev *sensor)
1882 {
1883         struct i2c_client *client = sensor->i2c_client;
1884         int ret;
1885
1886         ret = clk_prepare_enable(sensor->xclk);
1887         if (ret) {
1888                 dev_err(&client->dev, "%s: failed to enable clock\n",
1889                         __func__);
1890                 return ret;
1891         }
1892
1893         ret = regulator_bulk_enable(OV5640_NUM_SUPPLIES,
1894                                     sensor->supplies);
1895         if (ret) {
1896                 dev_err(&client->dev, "%s: failed to enable regulators\n",
1897                         __func__);
1898                 goto xclk_off;
1899         }
1900
1901         ov5640_reset(sensor);
1902         ov5640_power(sensor, true);
1903
1904         ret = ov5640_init_slave_id(sensor);
1905         if (ret)
1906                 goto power_off;
1907
1908         return 0;
1909
1910 power_off:
1911         ov5640_power(sensor, false);
1912         regulator_bulk_disable(OV5640_NUM_SUPPLIES, sensor->supplies);
1913 xclk_off:
1914         clk_disable_unprepare(sensor->xclk);
1915         return ret;
1916 }
1917
1918 static void ov5640_set_power_off(struct ov5640_dev *sensor)
1919 {
1920         ov5640_power(sensor, false);
1921         regulator_bulk_disable(OV5640_NUM_SUPPLIES, sensor->supplies);
1922         clk_disable_unprepare(sensor->xclk);
1923 }
1924
1925 static int ov5640_set_power_mipi(struct ov5640_dev *sensor, bool on)
1926 {
1927         int ret;
1928
1929         if (!on) {
1930                 /* Reset MIPI bus settings to their default values. */
1931                 ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x58);
1932                 ov5640_write_reg(sensor, OV5640_REG_MIPI_CTRL00, 0x04);
1933                 ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT00, 0x00);
1934                 return 0;
1935         }
1936
1937         /*
1938          * Power up MIPI HS Tx and LS Rx; 2 data lanes mode
1939          *
1940          * 0x300e = 0x40
1941          * [7:5] = 010  : 2 data lanes mode (see FIXME note in
1942          *                "ov5640_set_stream_mipi()")
1943          * [4] = 0      : Power up MIPI HS Tx
1944          * [3] = 0      : Power up MIPI LS Rx
1945          * [2] = 0      : MIPI interface disabled
1946          */
1947         ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x40);
1948         if (ret)
1949                 return ret;
1950
1951         /*
1952          * Gate clock and set LP11 in 'no packets mode' (idle)
1953          *
1954          * 0x4800 = 0x24
1955          * [5] = 1      : Gate clock when 'no packets'
1956          * [2] = 1      : MIPI bus in LP11 when 'no packets'
1957          */
1958         ret = ov5640_write_reg(sensor, OV5640_REG_MIPI_CTRL00, 0x24);
1959         if (ret)
1960                 return ret;
1961
1962         /*
1963          * Set data lanes and clock in LP11 when 'sleeping'
1964          *
1965          * 0x3019 = 0x70
1966          * [6] = 1      : MIPI data lane 2 in LP11 when 'sleeping'
1967          * [5] = 1      : MIPI data lane 1 in LP11 when 'sleeping'
1968          * [4] = 1      : MIPI clock lane in LP11 when 'sleeping'
1969          */
1970         ret = ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT00, 0x70);
1971         if (ret)
1972                 return ret;
1973
1974         /* Give lanes some time to coax into LP11 state. */
1975         usleep_range(500, 1000);
1976
1977         return 0;
1978 }
1979
1980 static int ov5640_set_power_dvp(struct ov5640_dev *sensor, bool on)
1981 {
1982         unsigned int flags = sensor->ep.bus.parallel.flags;
1983         bool bt656 = sensor->ep.bus_type == V4L2_MBUS_BT656;
1984         u8 polarities = 0;
1985         int ret;
1986
1987         if (!on) {
1988                 /* Reset settings to their default values. */
1989                 ov5640_write_reg(sensor, OV5640_REG_CCIR656_CTRL00, 0x00);
1990                 ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x58);
1991                 ov5640_write_reg(sensor, OV5640_REG_POLARITY_CTRL00, 0x20);
1992                 ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE01, 0x00);
1993                 ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE02, 0x00);
1994                 return 0;
1995         }
1996
1997         /*
1998          * Note about parallel port configuration.
1999          *
2000          * When configured in parallel mode, the OV5640 will
2001          * output 10 bits data on DVP data lines [9:0].
2002          * If only 8 bits data are wanted, the 8 bits data lines
2003          * of the camera interface must be physically connected
2004          * on the DVP data lines [9:2].
2005          *
2006          * Control lines polarity can be configured through
2007          * devicetree endpoint control lines properties.
2008          * If no endpoint control lines properties are set,
2009          * polarity will be as below:
2010          * - VSYNC:     active high
2011          * - HREF:      active low
2012          * - PCLK:      active low
2013          *
2014          * VSYNC & HREF are not configured if BT656 bus mode is selected
2015          */
2016
2017         /*
2018          * BT656 embedded synchronization configuration
2019          *
2020          * CCIR656 CTRL00
2021          * - [7]:       SYNC code selection (0: auto generate sync code,
2022          *              1: sync code from regs 0x4732-0x4735)
2023          * - [6]:       f value in CCIR656 SYNC code when fixed f value
2024          * - [5]:       Fixed f value
2025          * - [4:3]:     Blank toggle data options (00: data=1'h040/1'h200,
2026          *              01: data from regs 0x4736-0x4738, 10: always keep 0)
2027          * - [1]:       Clip data disable
2028          * - [0]:       CCIR656 mode enable
2029          *
2030          * Default CCIR656 SAV/EAV mode with default codes
2031          * SAV=0xff000080 & EAV=0xff00009d is enabled here with settings:
2032          * - CCIR656 mode enable
2033          * - auto generation of sync codes
2034          * - blank toggle data 1'h040/1'h200
2035          * - clip reserved data (0x00 & 0xff changed to 0x01 & 0xfe)
2036          */
2037         ret = ov5640_write_reg(sensor, OV5640_REG_CCIR656_CTRL00,
2038                                bt656 ? 0x01 : 0x00);
2039         if (ret)
2040                 return ret;
2041
2042         /*
2043          * configure parallel port control lines polarity
2044          *
2045          * POLARITY CTRL0
2046          * - [5]:       PCLK polarity (0: active low, 1: active high)
2047          * - [1]:       HREF polarity (0: active low, 1: active high)
2048          * - [0]:       VSYNC polarity (mismatch here between
2049          *              datasheet and hardware, 0 is active high
2050          *              and 1 is active low...)
2051          */
2052         if (!bt656) {
2053                 if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
2054                         polarities |= BIT(1);
2055                 if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
2056                         polarities |= BIT(0);
2057         }
2058         if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
2059                 polarities |= BIT(5);
2060
2061         ret = ov5640_write_reg(sensor, OV5640_REG_POLARITY_CTRL00, polarities);
2062         if (ret)
2063                 return ret;
2064
2065         /*
2066          * powerdown MIPI TX/RX PHY & enable DVP
2067          *
2068          * MIPI CONTROL 00
2069          * [4] = 1      : Power down MIPI HS Tx
2070          * [3] = 1      : Power down MIPI LS Rx
2071          * [2] = 0      : DVP enable (MIPI disable)
2072          */
2073         ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x18);
2074         if (ret)
2075                 return ret;
2076
2077         /*
2078          * enable VSYNC/HREF/PCLK DVP control lines
2079          * & D[9:6] DVP data lines
2080          *
2081          * PAD OUTPUT ENABLE 01
2082          * - 6:         VSYNC output enable
2083          * - 5:         HREF output enable
2084          * - 4:         PCLK output enable
2085          * - [3:0]:     D[9:6] output enable
2086          */
2087         ret = ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE01,
2088                                bt656 ? 0x1f : 0x7f);
2089         if (ret)
2090                 return ret;
2091
2092         /*
2093          * enable D[5:0] DVP data lines
2094          *
2095          * PAD OUTPUT ENABLE 02
2096          * - [7:2]:     D[5:0] output enable
2097          */
2098         return ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE02, 0xfc);
2099 }
2100
2101 static int ov5640_set_power(struct ov5640_dev *sensor, bool on)
2102 {
2103         int ret = 0;
2104
2105         if (on) {
2106                 ret = ov5640_set_power_on(sensor);
2107                 if (ret)
2108                         return ret;
2109
2110                 ret = ov5640_restore_mode(sensor);
2111                 if (ret)
2112                         goto power_off;
2113         }
2114
2115         if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY)
2116                 ret = ov5640_set_power_mipi(sensor, on);
2117         else
2118                 ret = ov5640_set_power_dvp(sensor, on);
2119         if (ret)
2120                 goto power_off;
2121
2122         if (!on)
2123                 ov5640_set_power_off(sensor);
2124
2125         return 0;
2126
2127 power_off:
2128         ov5640_set_power_off(sensor);
2129         return ret;
2130 }
2131
2132 /* --------------- Subdev Operations --------------- */
2133
2134 static int ov5640_s_power(struct v4l2_subdev *sd, int on)
2135 {
2136         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2137         int ret = 0;
2138
2139         mutex_lock(&sensor->lock);
2140
2141         /*
2142          * If the power count is modified from 0 to != 0 or from != 0 to 0,
2143          * update the power state.
2144          */
2145         if (sensor->power_count == !on) {
2146                 ret = ov5640_set_power(sensor, !!on);
2147                 if (ret)
2148                         goto out;
2149         }
2150
2151         /* Update the power count. */
2152         sensor->power_count += on ? 1 : -1;
2153         WARN_ON(sensor->power_count < 0);
2154 out:
2155         mutex_unlock(&sensor->lock);
2156
2157         if (on && !ret && sensor->power_count == 1) {
2158                 /* restore controls */
2159                 ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
2160         }
2161
2162         return ret;
2163 }
2164
2165 static int ov5640_try_frame_interval(struct ov5640_dev *sensor,
2166                                      struct v4l2_fract *fi,
2167                                      u32 width, u32 height)
2168 {
2169         const struct ov5640_mode_info *mode;
2170         enum ov5640_frame_rate rate = OV5640_15_FPS;
2171         int minfps, maxfps, best_fps, fps;
2172         int i;
2173
2174         minfps = ov5640_framerates[OV5640_15_FPS];
2175         maxfps = ov5640_framerates[OV5640_60_FPS];
2176
2177         if (fi->numerator == 0) {
2178                 fi->denominator = maxfps;
2179                 fi->numerator = 1;
2180                 rate = OV5640_60_FPS;
2181                 goto find_mode;
2182         }
2183
2184         fps = clamp_val(DIV_ROUND_CLOSEST(fi->denominator, fi->numerator),
2185                         minfps, maxfps);
2186
2187         best_fps = minfps;
2188         for (i = 0; i < ARRAY_SIZE(ov5640_framerates); i++) {
2189                 int curr_fps = ov5640_framerates[i];
2190
2191                 if (abs(curr_fps - fps) < abs(best_fps - fps)) {
2192                         best_fps = curr_fps;
2193                         rate = i;
2194                 }
2195         }
2196
2197         fi->numerator = 1;
2198         fi->denominator = best_fps;
2199
2200 find_mode:
2201         mode = ov5640_find_mode(sensor, rate, width, height, false);
2202         return mode ? rate : -EINVAL;
2203 }
2204
2205 static int ov5640_get_fmt(struct v4l2_subdev *sd,
2206                           struct v4l2_subdev_pad_config *cfg,
2207                           struct v4l2_subdev_format *format)
2208 {
2209         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2210         struct v4l2_mbus_framefmt *fmt;
2211
2212         if (format->pad != 0)
2213                 return -EINVAL;
2214
2215         mutex_lock(&sensor->lock);
2216
2217         if (format->which == V4L2_SUBDEV_FORMAT_TRY)
2218                 fmt = v4l2_subdev_get_try_format(&sensor->sd, cfg,
2219                                                  format->pad);
2220         else
2221                 fmt = &sensor->fmt;
2222
2223         format->format = *fmt;
2224
2225         mutex_unlock(&sensor->lock);
2226
2227         return 0;
2228 }
2229
2230 static int ov5640_try_fmt_internal(struct v4l2_subdev *sd,
2231                                    struct v4l2_mbus_framefmt *fmt,
2232                                    enum ov5640_frame_rate fr,
2233                                    const struct ov5640_mode_info **new_mode)
2234 {
2235         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2236         const struct ov5640_mode_info *mode;
2237         int i;
2238
2239         mode = ov5640_find_mode(sensor, fr, fmt->width, fmt->height, true);
2240         if (!mode)
2241                 return -EINVAL;
2242         fmt->width = mode->hact;
2243         fmt->height = mode->vact;
2244
2245         if (new_mode)
2246                 *new_mode = mode;
2247
2248         for (i = 0; i < ARRAY_SIZE(ov5640_formats); i++)
2249                 if (ov5640_formats[i].code == fmt->code)
2250                         break;
2251         if (i >= ARRAY_SIZE(ov5640_formats))
2252                 i = 0;
2253
2254         fmt->code = ov5640_formats[i].code;
2255         fmt->colorspace = ov5640_formats[i].colorspace;
2256         fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
2257         fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
2258         fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
2259
2260         return 0;
2261 }
2262
2263 static int ov5640_set_fmt(struct v4l2_subdev *sd,
2264                           struct v4l2_subdev_pad_config *cfg,
2265                           struct v4l2_subdev_format *format)
2266 {
2267         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2268         const struct ov5640_mode_info *new_mode;
2269         struct v4l2_mbus_framefmt *mbus_fmt = &format->format;
2270         struct v4l2_mbus_framefmt *fmt;
2271         int ret;
2272
2273         if (format->pad != 0)
2274                 return -EINVAL;
2275
2276         mutex_lock(&sensor->lock);
2277
2278         if (sensor->streaming) {
2279                 ret = -EBUSY;
2280                 goto out;
2281         }
2282
2283         ret = ov5640_try_fmt_internal(sd, mbus_fmt,
2284                                       sensor->current_fr, &new_mode);
2285         if (ret)
2286                 goto out;
2287
2288         if (format->which == V4L2_SUBDEV_FORMAT_TRY)
2289                 fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
2290         else
2291                 fmt = &sensor->fmt;
2292
2293         *fmt = *mbus_fmt;
2294
2295         if (new_mode != sensor->current_mode) {
2296                 sensor->current_mode = new_mode;
2297                 sensor->pending_mode_change = true;
2298         }
2299         if (mbus_fmt->code != sensor->fmt.code)
2300                 sensor->pending_fmt_change = true;
2301
2302         __v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate,
2303                                  ov5640_calc_pixel_rate(sensor));
2304 out:
2305         mutex_unlock(&sensor->lock);
2306         return ret;
2307 }
2308
2309 static int ov5640_set_framefmt(struct ov5640_dev *sensor,
2310                                struct v4l2_mbus_framefmt *format)
2311 {
2312         int ret = 0;
2313         bool is_jpeg = false;
2314         u8 fmt, mux;
2315
2316         switch (format->code) {
2317         case MEDIA_BUS_FMT_UYVY8_2X8:
2318                 /* YUV422, UYVY */
2319                 fmt = 0x3f;
2320                 mux = OV5640_FMT_MUX_YUV422;
2321                 break;
2322         case MEDIA_BUS_FMT_YUYV8_2X8:
2323                 /* YUV422, YUYV */
2324                 fmt = 0x30;
2325                 mux = OV5640_FMT_MUX_YUV422;
2326                 break;
2327         case MEDIA_BUS_FMT_RGB565_2X8_LE:
2328                 /* RGB565 {g[2:0],b[4:0]},{r[4:0],g[5:3]} */
2329                 fmt = 0x6F;
2330                 mux = OV5640_FMT_MUX_RGB;
2331                 break;
2332         case MEDIA_BUS_FMT_RGB565_2X8_BE:
2333                 /* RGB565 {r[4:0],g[5:3]},{g[2:0],b[4:0]} */
2334                 fmt = 0x61;
2335                 mux = OV5640_FMT_MUX_RGB;
2336                 break;
2337         case MEDIA_BUS_FMT_JPEG_1X8:
2338                 /* YUV422, YUYV */
2339                 fmt = 0x30;
2340                 mux = OV5640_FMT_MUX_YUV422;
2341                 is_jpeg = true;
2342                 break;
2343         case MEDIA_BUS_FMT_SBGGR8_1X8:
2344                 /* Raw, BGBG... / GRGR... */
2345                 fmt = 0x00;
2346                 mux = OV5640_FMT_MUX_RAW_DPC;
2347                 break;
2348         case MEDIA_BUS_FMT_SGBRG8_1X8:
2349                 /* Raw bayer, GBGB... / RGRG... */
2350                 fmt = 0x01;
2351                 mux = OV5640_FMT_MUX_RAW_DPC;
2352                 break;
2353         case MEDIA_BUS_FMT_SGRBG8_1X8:
2354                 /* Raw bayer, GRGR... / BGBG... */
2355                 fmt = 0x02;
2356                 mux = OV5640_FMT_MUX_RAW_DPC;
2357                 break;
2358         case MEDIA_BUS_FMT_SRGGB8_1X8:
2359                 /* Raw bayer, RGRG... / GBGB... */
2360                 fmt = 0x03;
2361                 mux = OV5640_FMT_MUX_RAW_DPC;
2362                 break;
2363         default:
2364                 return -EINVAL;
2365         }
2366
2367         /* FORMAT CONTROL00: YUV and RGB formatting */
2368         ret = ov5640_write_reg(sensor, OV5640_REG_FORMAT_CONTROL00, fmt);
2369         if (ret)
2370                 return ret;
2371
2372         /* FORMAT MUX CONTROL: ISP YUV or RGB */
2373         ret = ov5640_write_reg(sensor, OV5640_REG_ISP_FORMAT_MUX_CTRL, mux);
2374         if (ret)
2375                 return ret;
2376
2377         /*
2378          * TIMING TC REG21:
2379          * - [5]:       JPEG enable
2380          */
2381         ret = ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
2382                              BIT(5), is_jpeg ? BIT(5) : 0);
2383         if (ret)
2384                 return ret;
2385
2386         /*
2387          * SYSTEM RESET02:
2388          * - [4]:       Reset JFIFO
2389          * - [3]:       Reset SFIFO
2390          * - [2]:       Reset JPEG
2391          */
2392         ret = ov5640_mod_reg(sensor, OV5640_REG_SYS_RESET02,
2393                              BIT(4) | BIT(3) | BIT(2),
2394                              is_jpeg ? 0 : (BIT(4) | BIT(3) | BIT(2)));
2395         if (ret)
2396                 return ret;
2397
2398         /*
2399          * CLOCK ENABLE02:
2400          * - [5]:       Enable JPEG 2x clock
2401          * - [3]:       Enable JPEG clock
2402          */
2403         return ov5640_mod_reg(sensor, OV5640_REG_SYS_CLOCK_ENABLE02,
2404                               BIT(5) | BIT(3),
2405                               is_jpeg ? (BIT(5) | BIT(3)) : 0);
2406 }
2407
2408 /*
2409  * Sensor Controls.
2410  */
2411
2412 static int ov5640_set_ctrl_hue(struct ov5640_dev *sensor, int value)
2413 {
2414         int ret;
2415
2416         if (value) {
2417                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
2418                                      BIT(0), BIT(0));
2419                 if (ret)
2420                         return ret;
2421                 ret = ov5640_write_reg16(sensor, OV5640_REG_SDE_CTRL1, value);
2422         } else {
2423                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(0), 0);
2424         }
2425
2426         return ret;
2427 }
2428
2429 static int ov5640_set_ctrl_contrast(struct ov5640_dev *sensor, int value)
2430 {
2431         int ret;
2432
2433         if (value) {
2434                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
2435                                      BIT(2), BIT(2));
2436                 if (ret)
2437                         return ret;
2438                 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL5,
2439                                        value & 0xff);
2440         } else {
2441                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(2), 0);
2442         }
2443
2444         return ret;
2445 }
2446
2447 static int ov5640_set_ctrl_saturation(struct ov5640_dev *sensor, int value)
2448 {
2449         int ret;
2450
2451         if (value) {
2452                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
2453                                      BIT(1), BIT(1));
2454                 if (ret)
2455                         return ret;
2456                 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL3,
2457                                        value & 0xff);
2458                 if (ret)
2459                         return ret;
2460                 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL4,
2461                                        value & 0xff);
2462         } else {
2463                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(1), 0);
2464         }
2465
2466         return ret;
2467 }
2468
2469 static int ov5640_set_ctrl_white_balance(struct ov5640_dev *sensor, int awb)
2470 {
2471         int ret;
2472
2473         ret = ov5640_mod_reg(sensor, OV5640_REG_AWB_MANUAL_CTRL,
2474                              BIT(0), awb ? 0 : 1);
2475         if (ret)
2476                 return ret;
2477
2478         if (!awb) {
2479                 u16 red = (u16)sensor->ctrls.red_balance->val;
2480                 u16 blue = (u16)sensor->ctrls.blue_balance->val;
2481
2482                 ret = ov5640_write_reg16(sensor, OV5640_REG_AWB_R_GAIN, red);
2483                 if (ret)
2484                         return ret;
2485                 ret = ov5640_write_reg16(sensor, OV5640_REG_AWB_B_GAIN, blue);
2486         }
2487
2488         return ret;
2489 }
2490
2491 static int ov5640_set_ctrl_exposure(struct ov5640_dev *sensor,
2492                                     enum v4l2_exposure_auto_type auto_exposure)
2493 {
2494         struct ov5640_ctrls *ctrls = &sensor->ctrls;
2495         bool auto_exp = (auto_exposure == V4L2_EXPOSURE_AUTO);
2496         int ret = 0;
2497
2498         if (ctrls->auto_exp->is_new) {
2499                 ret = ov5640_set_autoexposure(sensor, auto_exp);
2500                 if (ret)
2501                         return ret;
2502         }
2503
2504         if (!auto_exp && ctrls->exposure->is_new) {
2505                 u16 max_exp;
2506
2507                 ret = ov5640_read_reg16(sensor, OV5640_REG_AEC_PK_VTS,
2508                                         &max_exp);
2509                 if (ret)
2510                         return ret;
2511                 ret = ov5640_get_vts(sensor);
2512                 if (ret < 0)
2513                         return ret;
2514                 max_exp += ret;
2515                 ret = 0;
2516
2517                 if (ctrls->exposure->val < max_exp)
2518                         ret = ov5640_set_exposure(sensor, ctrls->exposure->val);
2519         }
2520
2521         return ret;
2522 }
2523
2524 static int ov5640_set_ctrl_gain(struct ov5640_dev *sensor, bool auto_gain)
2525 {
2526         struct ov5640_ctrls *ctrls = &sensor->ctrls;
2527         int ret = 0;
2528
2529         if (ctrls->auto_gain->is_new) {
2530                 ret = ov5640_set_autogain(sensor, auto_gain);
2531                 if (ret)
2532                         return ret;
2533         }
2534
2535         if (!auto_gain && ctrls->gain->is_new)
2536                 ret = ov5640_set_gain(sensor, ctrls->gain->val);
2537
2538         return ret;
2539 }
2540
2541 static const char * const test_pattern_menu[] = {
2542         "Disabled",
2543         "Color bars",
2544         "Color bars w/ rolling bar",
2545         "Color squares",
2546         "Color squares w/ rolling bar",
2547 };
2548
2549 #define OV5640_TEST_ENABLE              BIT(7)
2550 #define OV5640_TEST_ROLLING             BIT(6)  /* rolling horizontal bar */
2551 #define OV5640_TEST_TRANSPARENT         BIT(5)
2552 #define OV5640_TEST_SQUARE_BW           BIT(4)  /* black & white squares */
2553 #define OV5640_TEST_BAR_STANDARD        (0 << 2)
2554 #define OV5640_TEST_BAR_VERT_CHANGE_1   (1 << 2)
2555 #define OV5640_TEST_BAR_HOR_CHANGE      (2 << 2)
2556 #define OV5640_TEST_BAR_VERT_CHANGE_2   (3 << 2)
2557 #define OV5640_TEST_BAR                 (0 << 0)
2558 #define OV5640_TEST_RANDOM              (1 << 0)
2559 #define OV5640_TEST_SQUARE              (2 << 0)
2560 #define OV5640_TEST_BLACK               (3 << 0)
2561
2562 static const u8 test_pattern_val[] = {
2563         0,
2564         OV5640_TEST_ENABLE | OV5640_TEST_BAR_VERT_CHANGE_1 |
2565                 OV5640_TEST_BAR,
2566         OV5640_TEST_ENABLE | OV5640_TEST_ROLLING |
2567                 OV5640_TEST_BAR_VERT_CHANGE_1 | OV5640_TEST_BAR,
2568         OV5640_TEST_ENABLE | OV5640_TEST_SQUARE,
2569         OV5640_TEST_ENABLE | OV5640_TEST_ROLLING | OV5640_TEST_SQUARE,
2570 };
2571
2572 static int ov5640_set_ctrl_test_pattern(struct ov5640_dev *sensor, int value)
2573 {
2574         return ov5640_write_reg(sensor, OV5640_REG_PRE_ISP_TEST_SET1,
2575                                 test_pattern_val[value]);
2576 }
2577
2578 static int ov5640_set_ctrl_light_freq(struct ov5640_dev *sensor, int value)
2579 {
2580         int ret;
2581
2582         ret = ov5640_mod_reg(sensor, OV5640_REG_HZ5060_CTRL01, BIT(7),
2583                              (value == V4L2_CID_POWER_LINE_FREQUENCY_AUTO) ?
2584                              0 : BIT(7));
2585         if (ret)
2586                 return ret;
2587
2588         return ov5640_mod_reg(sensor, OV5640_REG_HZ5060_CTRL00, BIT(2),
2589                               (value == V4L2_CID_POWER_LINE_FREQUENCY_50HZ) ?
2590                               BIT(2) : 0);
2591 }
2592
2593 static int ov5640_set_ctrl_hflip(struct ov5640_dev *sensor, int value)
2594 {
2595         /*
2596          * If sensor is mounted upside down, mirror logic is inversed.
2597          *
2598          * Sensor is a BSI (Back Side Illuminated) one,
2599          * so image captured is physically mirrored.
2600          * This is why mirror logic is inversed in
2601          * order to cancel this mirror effect.
2602          */
2603
2604         /*
2605          * TIMING TC REG21:
2606          * - [2]:       ISP mirror
2607          * - [1]:       Sensor mirror
2608          */
2609         return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
2610                               BIT(2) | BIT(1),
2611                               (!(value ^ sensor->upside_down)) ?
2612                               (BIT(2) | BIT(1)) : 0);
2613 }
2614
2615 static int ov5640_set_ctrl_vflip(struct ov5640_dev *sensor, int value)
2616 {
2617         /* If sensor is mounted upside down, flip logic is inversed */
2618
2619         /*
2620          * TIMING TC REG20:
2621          * - [2]:       ISP vflip
2622          * - [1]:       Sensor vflip
2623          */
2624         return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG20,
2625                               BIT(2) | BIT(1),
2626                               (value ^ sensor->upside_down) ?
2627                               (BIT(2) | BIT(1)) : 0);
2628 }
2629
2630 static int ov5640_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
2631 {
2632         struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
2633         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2634         int val;
2635
2636         /* v4l2_ctrl_lock() locks our own mutex */
2637
2638         switch (ctrl->id) {
2639         case V4L2_CID_AUTOGAIN:
2640                 val = ov5640_get_gain(sensor);
2641                 if (val < 0)
2642                         return val;
2643                 sensor->ctrls.gain->val = val;
2644                 break;
2645         case V4L2_CID_EXPOSURE_AUTO:
2646                 val = ov5640_get_exposure(sensor);
2647                 if (val < 0)
2648                         return val;
2649                 sensor->ctrls.exposure->val = val;
2650                 break;
2651         }
2652
2653         return 0;
2654 }
2655
2656 static int ov5640_s_ctrl(struct v4l2_ctrl *ctrl)
2657 {
2658         struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
2659         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2660         int ret;
2661
2662         /* v4l2_ctrl_lock() locks our own mutex */
2663
2664         /*
2665          * If the device is not powered up by the host driver do
2666          * not apply any controls to H/W at this time. Instead
2667          * the controls will be restored right after power-up.
2668          */
2669         if (sensor->power_count == 0)
2670                 return 0;
2671
2672         switch (ctrl->id) {
2673         case V4L2_CID_AUTOGAIN:
2674                 ret = ov5640_set_ctrl_gain(sensor, ctrl->val);
2675                 break;
2676         case V4L2_CID_EXPOSURE_AUTO:
2677                 ret = ov5640_set_ctrl_exposure(sensor, ctrl->val);
2678                 break;
2679         case V4L2_CID_AUTO_WHITE_BALANCE:
2680                 ret = ov5640_set_ctrl_white_balance(sensor, ctrl->val);
2681                 break;
2682         case V4L2_CID_HUE:
2683                 ret = ov5640_set_ctrl_hue(sensor, ctrl->val);
2684                 break;
2685         case V4L2_CID_CONTRAST:
2686                 ret = ov5640_set_ctrl_contrast(sensor, ctrl->val);
2687                 break;
2688         case V4L2_CID_SATURATION:
2689                 ret = ov5640_set_ctrl_saturation(sensor, ctrl->val);
2690                 break;
2691         case V4L2_CID_TEST_PATTERN:
2692                 ret = ov5640_set_ctrl_test_pattern(sensor, ctrl->val);
2693                 break;
2694         case V4L2_CID_POWER_LINE_FREQUENCY:
2695                 ret = ov5640_set_ctrl_light_freq(sensor, ctrl->val);
2696                 break;
2697         case V4L2_CID_HFLIP:
2698                 ret = ov5640_set_ctrl_hflip(sensor, ctrl->val);
2699                 break;
2700         case V4L2_CID_VFLIP:
2701                 ret = ov5640_set_ctrl_vflip(sensor, ctrl->val);
2702                 break;
2703         default:
2704                 ret = -EINVAL;
2705                 break;
2706         }
2707
2708         return ret;
2709 }
2710
2711 static const struct v4l2_ctrl_ops ov5640_ctrl_ops = {
2712         .g_volatile_ctrl = ov5640_g_volatile_ctrl,
2713         .s_ctrl = ov5640_s_ctrl,
2714 };
2715
2716 static int ov5640_init_controls(struct ov5640_dev *sensor)
2717 {
2718         const struct v4l2_ctrl_ops *ops = &ov5640_ctrl_ops;
2719         struct ov5640_ctrls *ctrls = &sensor->ctrls;
2720         struct v4l2_ctrl_handler *hdl = &ctrls->handler;
2721         int ret;
2722
2723         v4l2_ctrl_handler_init(hdl, 32);
2724
2725         /* we can use our own mutex for the ctrl lock */
2726         hdl->lock = &sensor->lock;
2727
2728         /* Clock related controls */
2729         ctrls->pixel_rate = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_PIXEL_RATE,
2730                                               0, INT_MAX, 1,
2731                                               ov5640_calc_pixel_rate(sensor));
2732
2733         /* Auto/manual white balance */
2734         ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops,
2735                                            V4L2_CID_AUTO_WHITE_BALANCE,
2736                                            0, 1, 1, 1);
2737         ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE,
2738                                                 0, 4095, 1, 0);
2739         ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE,
2740                                                0, 4095, 1, 0);
2741         /* Auto/manual exposure */
2742         ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops,
2743                                                  V4L2_CID_EXPOSURE_AUTO,
2744                                                  V4L2_EXPOSURE_MANUAL, 0,
2745                                                  V4L2_EXPOSURE_AUTO);
2746         ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
2747                                             0, 65535, 1, 0);
2748         /* Auto/manual gain */
2749         ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN,
2750                                              0, 1, 1, 1);
2751         ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN,
2752                                         0, 1023, 1, 0);
2753
2754         ctrls->saturation = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION,
2755                                               0, 255, 1, 64);
2756         ctrls->hue = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HUE,
2757                                        0, 359, 1, 0);
2758         ctrls->contrast = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST,
2759                                             0, 255, 1, 0);
2760         ctrls->test_pattern =
2761                 v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN,
2762                                              ARRAY_SIZE(test_pattern_menu) - 1,
2763                                              0, 0, test_pattern_menu);
2764         ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP,
2765                                          0, 1, 1, 0);
2766         ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP,
2767                                          0, 1, 1, 0);
2768
2769         ctrls->light_freq =
2770                 v4l2_ctrl_new_std_menu(hdl, ops,
2771                                        V4L2_CID_POWER_LINE_FREQUENCY,
2772                                        V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
2773                                        V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
2774
2775         if (hdl->error) {
2776                 ret = hdl->error;
2777                 goto free_ctrls;
2778         }
2779
2780         ctrls->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
2781         ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
2782         ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;
2783
2784         v4l2_ctrl_auto_cluster(3, &ctrls->auto_wb, 0, false);
2785         v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true);
2786         v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true);
2787
2788         sensor->sd.ctrl_handler = hdl;
2789         return 0;
2790
2791 free_ctrls:
2792         v4l2_ctrl_handler_free(hdl);
2793         return ret;
2794 }
2795
2796 static int ov5640_enum_frame_size(struct v4l2_subdev *sd,
2797                                   struct v4l2_subdev_pad_config *cfg,
2798                                   struct v4l2_subdev_frame_size_enum *fse)
2799 {
2800         if (fse->pad != 0)
2801                 return -EINVAL;
2802         if (fse->index >= OV5640_NUM_MODES)
2803                 return -EINVAL;
2804
2805         fse->min_width =
2806                 ov5640_mode_data[fse->index].hact;
2807         fse->max_width = fse->min_width;
2808         fse->min_height =
2809                 ov5640_mode_data[fse->index].vact;
2810         fse->max_height = fse->min_height;
2811
2812         return 0;
2813 }
2814
2815 static int ov5640_enum_frame_interval(
2816         struct v4l2_subdev *sd,
2817         struct v4l2_subdev_pad_config *cfg,
2818         struct v4l2_subdev_frame_interval_enum *fie)
2819 {
2820         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2821         struct v4l2_fract tpf;
2822         int ret;
2823
2824         if (fie->pad != 0)
2825                 return -EINVAL;
2826         if (fie->index >= OV5640_NUM_FRAMERATES)
2827                 return -EINVAL;
2828
2829         tpf.numerator = 1;
2830         tpf.denominator = ov5640_framerates[fie->index];
2831
2832         ret = ov5640_try_frame_interval(sensor, &tpf,
2833                                         fie->width, fie->height);
2834         if (ret < 0)
2835                 return -EINVAL;
2836
2837         fie->interval = tpf;
2838         return 0;
2839 }
2840
2841 static int ov5640_g_frame_interval(struct v4l2_subdev *sd,
2842                                    struct v4l2_subdev_frame_interval *fi)
2843 {
2844         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2845
2846         mutex_lock(&sensor->lock);
2847         fi->interval = sensor->frame_interval;
2848         mutex_unlock(&sensor->lock);
2849
2850         return 0;
2851 }
2852
2853 static int ov5640_s_frame_interval(struct v4l2_subdev *sd,
2854                                    struct v4l2_subdev_frame_interval *fi)
2855 {
2856         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2857         const struct ov5640_mode_info *mode;
2858         int frame_rate, ret = 0;
2859
2860         if (fi->pad != 0)
2861                 return -EINVAL;
2862
2863         mutex_lock(&sensor->lock);
2864
2865         if (sensor->streaming) {
2866                 ret = -EBUSY;
2867                 goto out;
2868         }
2869
2870         mode = sensor->current_mode;
2871
2872         frame_rate = ov5640_try_frame_interval(sensor, &fi->interval,
2873                                                mode->hact, mode->vact);
2874         if (frame_rate < 0) {
2875                 /* Always return a valid frame interval value */
2876                 fi->interval = sensor->frame_interval;
2877                 goto out;
2878         }
2879
2880         mode = ov5640_find_mode(sensor, frame_rate, mode->hact,
2881                                 mode->vact, true);
2882         if (!mode) {
2883                 ret = -EINVAL;
2884                 goto out;
2885         }
2886
2887         if (mode != sensor->current_mode ||
2888             frame_rate != sensor->current_fr) {
2889                 sensor->current_fr = frame_rate;
2890                 sensor->frame_interval = fi->interval;
2891                 sensor->current_mode = mode;
2892                 sensor->pending_mode_change = true;
2893
2894                 __v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate,
2895                                          ov5640_calc_pixel_rate(sensor));
2896         }
2897 out:
2898         mutex_unlock(&sensor->lock);
2899         return ret;
2900 }
2901
2902 static int ov5640_enum_mbus_code(struct v4l2_subdev *sd,
2903                                  struct v4l2_subdev_pad_config *cfg,
2904                                  struct v4l2_subdev_mbus_code_enum *code)
2905 {
2906         if (code->pad != 0)
2907                 return -EINVAL;
2908         if (code->index >= ARRAY_SIZE(ov5640_formats))
2909                 return -EINVAL;
2910
2911         code->code = ov5640_formats[code->index].code;
2912         return 0;
2913 }
2914
2915 static int ov5640_s_stream(struct v4l2_subdev *sd, int enable)
2916 {
2917         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2918         int ret = 0;
2919
2920         mutex_lock(&sensor->lock);
2921
2922         if (sensor->streaming == !enable) {
2923                 if (enable && sensor->pending_mode_change) {
2924                         ret = ov5640_set_mode(sensor);
2925                         if (ret)
2926                                 goto out;
2927                 }
2928
2929                 if (enable && sensor->pending_fmt_change) {
2930                         ret = ov5640_set_framefmt(sensor, &sensor->fmt);
2931                         if (ret)
2932                                 goto out;
2933                         sensor->pending_fmt_change = false;
2934                 }
2935
2936                 if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY)
2937                         ret = ov5640_set_stream_mipi(sensor, enable);
2938                 else
2939                         ret = ov5640_set_stream_dvp(sensor, enable);
2940
2941                 if (!ret)
2942                         sensor->streaming = enable;
2943         }
2944 out:
2945         mutex_unlock(&sensor->lock);
2946         return ret;
2947 }
2948
2949 static const struct v4l2_subdev_core_ops ov5640_core_ops = {
2950         .s_power = ov5640_s_power,
2951         .log_status = v4l2_ctrl_subdev_log_status,
2952         .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
2953         .unsubscribe_event = v4l2_event_subdev_unsubscribe,
2954 };
2955
2956 static const struct v4l2_subdev_video_ops ov5640_video_ops = {
2957         .g_frame_interval = ov5640_g_frame_interval,
2958         .s_frame_interval = ov5640_s_frame_interval,
2959         .s_stream = ov5640_s_stream,
2960 };
2961
2962 static const struct v4l2_subdev_pad_ops ov5640_pad_ops = {
2963         .enum_mbus_code = ov5640_enum_mbus_code,
2964         .get_fmt = ov5640_get_fmt,
2965         .set_fmt = ov5640_set_fmt,
2966         .enum_frame_size = ov5640_enum_frame_size,
2967         .enum_frame_interval = ov5640_enum_frame_interval,
2968 };
2969
2970 static const struct v4l2_subdev_ops ov5640_subdev_ops = {
2971         .core = &ov5640_core_ops,
2972         .video = &ov5640_video_ops,
2973         .pad = &ov5640_pad_ops,
2974 };
2975
2976 static int ov5640_get_regulators(struct ov5640_dev *sensor)
2977 {
2978         int i;
2979
2980         for (i = 0; i < OV5640_NUM_SUPPLIES; i++)
2981                 sensor->supplies[i].supply = ov5640_supply_name[i];
2982
2983         return devm_regulator_bulk_get(&sensor->i2c_client->dev,
2984                                        OV5640_NUM_SUPPLIES,
2985                                        sensor->supplies);
2986 }
2987
2988 static int ov5640_check_chip_id(struct ov5640_dev *sensor)
2989 {
2990         struct i2c_client *client = sensor->i2c_client;
2991         int ret = 0;
2992         u16 chip_id;
2993
2994         ret = ov5640_set_power_on(sensor);
2995         if (ret)
2996                 return ret;
2997
2998         ret = ov5640_read_reg16(sensor, OV5640_REG_CHIP_ID, &chip_id);
2999         if (ret) {
3000                 dev_err(&client->dev, "%s: failed to read chip identifier\n",
3001                         __func__);
3002                 goto power_off;
3003         }
3004
3005         if (chip_id != 0x5640) {
3006                 dev_err(&client->dev, "%s: wrong chip identifier, expected 0x5640, got 0x%x\n",
3007                         __func__, chip_id);
3008                 ret = -ENXIO;
3009         }
3010
3011 power_off:
3012         ov5640_set_power_off(sensor);
3013         return ret;
3014 }
3015
3016 static int ov5640_probe(struct i2c_client *client)
3017 {
3018         struct device *dev = &client->dev;
3019         struct fwnode_handle *endpoint;
3020         struct ov5640_dev *sensor;
3021         struct v4l2_mbus_framefmt *fmt;
3022         u32 rotation;
3023         int ret;
3024
3025         sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
3026         if (!sensor)
3027                 return -ENOMEM;
3028
3029         sensor->i2c_client = client;
3030
3031         /*
3032          * default init sequence initialize sensor to
3033          * YUV422 UYVY VGA@30fps
3034          */
3035         fmt = &sensor->fmt;
3036         fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
3037         fmt->colorspace = V4L2_COLORSPACE_SRGB;
3038         fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
3039         fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
3040         fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
3041         fmt->width = 640;
3042         fmt->height = 480;
3043         fmt->field = V4L2_FIELD_NONE;
3044         sensor->frame_interval.numerator = 1;
3045         sensor->frame_interval.denominator = ov5640_framerates[OV5640_30_FPS];
3046         sensor->current_fr = OV5640_30_FPS;
3047         sensor->current_mode =
3048                 &ov5640_mode_data[OV5640_MODE_VGA_640_480];
3049         sensor->last_mode = sensor->current_mode;
3050
3051         sensor->ae_target = 52;
3052
3053         /* optional indication of physical rotation of sensor */
3054         ret = fwnode_property_read_u32(dev_fwnode(&client->dev), "rotation",
3055                                        &rotation);
3056         if (!ret) {
3057                 switch (rotation) {
3058                 case 180:
3059                         sensor->upside_down = true;
3060                         fallthrough;
3061                 case 0:
3062                         break;
3063                 default:
3064                         dev_warn(dev, "%u degrees rotation is not supported, ignoring...\n",
3065                                  rotation);
3066                 }
3067         }
3068
3069         endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(&client->dev),
3070                                                   NULL);
3071         if (!endpoint) {
3072                 dev_err(dev, "endpoint node not found\n");
3073                 return -EINVAL;
3074         }
3075
3076         ret = v4l2_fwnode_endpoint_parse(endpoint, &sensor->ep);
3077         fwnode_handle_put(endpoint);
3078         if (ret) {
3079                 dev_err(dev, "Could not parse endpoint\n");
3080                 return ret;
3081         }
3082
3083         if (sensor->ep.bus_type != V4L2_MBUS_PARALLEL &&
3084             sensor->ep.bus_type != V4L2_MBUS_CSI2_DPHY &&
3085             sensor->ep.bus_type != V4L2_MBUS_BT656) {
3086                 dev_err(dev, "Unsupported bus type %d\n", sensor->ep.bus_type);
3087                 return -EINVAL;
3088         }
3089
3090         /* get system clock (xclk) */
3091         sensor->xclk = devm_clk_get(dev, "xclk");
3092         if (IS_ERR(sensor->xclk)) {
3093                 dev_err(dev, "failed to get xclk\n");
3094                 return PTR_ERR(sensor->xclk);
3095         }
3096
3097         sensor->xclk_freq = clk_get_rate(sensor->xclk);
3098         if (sensor->xclk_freq < OV5640_XCLK_MIN ||
3099             sensor->xclk_freq > OV5640_XCLK_MAX) {
3100                 dev_err(dev, "xclk frequency out of range: %d Hz\n",
3101                         sensor->xclk_freq);
3102                 return -EINVAL;
3103         }
3104
3105         /* request optional power down pin */
3106         sensor->pwdn_gpio = devm_gpiod_get_optional(dev, "powerdown",
3107                                                     GPIOD_OUT_HIGH);
3108         if (IS_ERR(sensor->pwdn_gpio))
3109                 return PTR_ERR(sensor->pwdn_gpio);
3110
3111         /* request optional reset pin */
3112         sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset",
3113                                                      GPIOD_OUT_HIGH);
3114         if (IS_ERR(sensor->reset_gpio))
3115                 return PTR_ERR(sensor->reset_gpio);
3116
3117         v4l2_i2c_subdev_init(&sensor->sd, client, &ov5640_subdev_ops);
3118
3119         sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
3120                             V4L2_SUBDEV_FL_HAS_EVENTS;
3121         sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
3122         sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
3123         ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
3124         if (ret)
3125                 return ret;
3126
3127         ret = ov5640_get_regulators(sensor);
3128         if (ret)
3129                 return ret;
3130
3131         mutex_init(&sensor->lock);
3132
3133         ret = ov5640_check_chip_id(sensor);
3134         if (ret)
3135                 goto entity_cleanup;
3136
3137         ret = ov5640_init_controls(sensor);
3138         if (ret)
3139                 goto entity_cleanup;
3140
3141         ret = v4l2_async_register_subdev_sensor_common(&sensor->sd);
3142         if (ret)
3143                 goto free_ctrls;
3144
3145         return 0;
3146
3147 free_ctrls:
3148         v4l2_ctrl_handler_free(&sensor->ctrls.handler);
3149 entity_cleanup:
3150         media_entity_cleanup(&sensor->sd.entity);
3151         mutex_destroy(&sensor->lock);
3152         return ret;
3153 }
3154
3155 static int ov5640_remove(struct i2c_client *client)
3156 {
3157         struct v4l2_subdev *sd = i2c_get_clientdata(client);
3158         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3159
3160         v4l2_async_unregister_subdev(&sensor->sd);
3161         media_entity_cleanup(&sensor->sd.entity);
3162         v4l2_ctrl_handler_free(&sensor->ctrls.handler);
3163         mutex_destroy(&sensor->lock);
3164
3165         return 0;
3166 }
3167
3168 static const struct i2c_device_id ov5640_id[] = {
3169         {"ov5640", 0},
3170         {},
3171 };
3172 MODULE_DEVICE_TABLE(i2c, ov5640_id);
3173
3174 static const struct of_device_id ov5640_dt_ids[] = {
3175         { .compatible = "ovti,ov5640" },
3176         { /* sentinel */ }
3177 };
3178 MODULE_DEVICE_TABLE(of, ov5640_dt_ids);
3179
3180 static struct i2c_driver ov5640_i2c_driver = {
3181         .driver = {
3182                 .name  = "ov5640",
3183                 .of_match_table = ov5640_dt_ids,
3184         },
3185         .id_table = ov5640_id,
3186         .probe_new = ov5640_probe,
3187         .remove   = ov5640_remove,
3188 };
3189
3190 module_i2c_driver(ov5640_i2c_driver);
3191
3192 MODULE_DESCRIPTION("OV5640 MIPI Camera Subdev Driver");
3193 MODULE_LICENSE("GPL");