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_CHIP_ID              0x300a
  38 #define OV5640_REG_IO_MIPI_CTRL00       0x300e
  39 #define OV5640_REG_PAD_OUTPUT_ENABLE01  0x3017
  40 #define OV5640_REG_PAD_OUTPUT_ENABLE02  0x3018
  41 #define OV5640_REG_PAD_OUTPUT00         0x3019
  42 #define OV5640_REG_SYSTEM_CONTROL1      0x302e
  43 #define OV5640_REG_SC_PLL_CTRL0         0x3034
  44 #define OV5640_REG_SC_PLL_CTRL1         0x3035
  45 #define OV5640_REG_SC_PLL_CTRL2         0x3036
  46 #define OV5640_REG_SC_PLL_CTRL3         0x3037
  47 #define OV5640_REG_SLAVE_ID             0x3100
  48 #define OV5640_REG_SCCB_SYS_CTRL1       0x3103
  49 #define OV5640_REG_SYS_ROOT_DIVIDER     0x3108
  50 #define OV5640_REG_AWB_R_GAIN           0x3400
  51 #define OV5640_REG_AWB_G_GAIN           0x3402
  52 #define OV5640_REG_AWB_B_GAIN           0x3404
  53 #define OV5640_REG_AWB_MANUAL_CTRL      0x3406
  54 #define OV5640_REG_AEC_PK_EXPOSURE_HI   0x3500
  55 #define OV5640_REG_AEC_PK_EXPOSURE_MED  0x3501
  56 #define OV5640_REG_AEC_PK_EXPOSURE_LO   0x3502
  57 #define OV5640_REG_AEC_PK_MANUAL        0x3503
  58 #define OV5640_REG_AEC_PK_REAL_GAIN     0x350a
  59 #define OV5640_REG_AEC_PK_VTS           0x350c
  60 #define OV5640_REG_TIMING_DVPHO         0x3808
  61 #define OV5640_REG_TIMING_DVPVO         0x380a
  62 #define OV5640_REG_TIMING_HTS           0x380c
  63 #define OV5640_REG_TIMING_VTS           0x380e
  64 #define OV5640_REG_TIMING_TC_REG20      0x3820
  65 #define OV5640_REG_TIMING_TC_REG21      0x3821
  66 #define OV5640_REG_AEC_CTRL00           0x3a00
  67 #define OV5640_REG_AEC_B50_STEP         0x3a08
  68 #define OV5640_REG_AEC_B60_STEP         0x3a0a
  69 #define OV5640_REG_AEC_CTRL0D           0x3a0d
  70 #define OV5640_REG_AEC_CTRL0E           0x3a0e
  71 #define OV5640_REG_AEC_CTRL0F           0x3a0f
  72 #define OV5640_REG_AEC_CTRL10           0x3a10
  73 #define OV5640_REG_AEC_CTRL11           0x3a11
  74 #define OV5640_REG_AEC_CTRL1B           0x3a1b
  75 #define OV5640_REG_AEC_CTRL1E           0x3a1e
  76 #define OV5640_REG_AEC_CTRL1F           0x3a1f
  77 #define OV5640_REG_HZ5060_CTRL00        0x3c00
  78 #define OV5640_REG_HZ5060_CTRL01        0x3c01
  79 #define OV5640_REG_SIGMADELTA_CTRL0C    0x3c0c
  80 #define OV5640_REG_FRAME_CTRL01         0x4202
  81 #define OV5640_REG_FORMAT_CONTROL00     0x4300
  82 #define OV5640_REG_VFIFO_HSIZE          0x4602
  83 #define OV5640_REG_VFIFO_VSIZE          0x4604
  84 #define OV5640_REG_JPG_MODE_SELECT      0x4713
  85 #define OV5640_REG_POLARITY_CTRL00      0x4740
  86 #define OV5640_REG_MIPI_CTRL00          0x4800
  87 #define OV5640_REG_DEBUG_MODE           0x4814
  88 #define OV5640_REG_ISP_FORMAT_MUX_CTRL  0x501f
  89 #define OV5640_REG_PRE_ISP_TEST_SET1    0x503d
  90 #define OV5640_REG_SDE_CTRL0            0x5580
  91 #define OV5640_REG_SDE_CTRL1            0x5581
  92 #define OV5640_REG_SDE_CTRL3            0x5583
  93 #define OV5640_REG_SDE_CTRL4            0x5584
  94 #define OV5640_REG_SDE_CTRL5            0x5585
  95 #define OV5640_REG_AVG_READOUT          0x56a1
  96
  97 enum ov5640_mode_id {
  98         OV5640_MODE_QCIF_176_144 = 0,
  99         OV5640_MODE_QVGA_320_240,
 100         OV5640_MODE_VGA_640_480,
 101         OV5640_MODE_NTSC_720_480,
 102         OV5640_MODE_PAL_720_576,
 103         OV5640_MODE_XGA_1024_768,
 104         OV5640_MODE_720P_1280_720,
 105         OV5640_MODE_1080P_1920_1080,
 106         OV5640_MODE_QSXGA_2592_1944,
 107         OV5640_NUM_MODES,
 108 };
 109
 110 enum ov5640_frame_rate {
 111         OV5640_15_FPS = 0,
 112         OV5640_30_FPS,
 113         OV5640_60_FPS,
 114         OV5640_NUM_FRAMERATES,
 115 };
 116
 117 enum ov5640_format_mux {
 118         OV5640_FMT_MUX_YUV422 = 0,
 119         OV5640_FMT_MUX_RGB,
 120         OV5640_FMT_MUX_DITHER,
 121         OV5640_FMT_MUX_RAW_DPC,
 122         OV5640_FMT_MUX_SNR_RAW,
 123         OV5640_FMT_MUX_RAW_CIP,
 124 };
 125
 126 struct ov5640_pixfmt {
 127         u32 code;
 128         u32 colorspace;
 129 };
 130
 131 static const struct ov5640_pixfmt ov5640_formats[] = {
 132         { MEDIA_BUS_FMT_JPEG_1X8, V4L2_COLORSPACE_JPEG, },
 133         { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_COLORSPACE_SRGB, },
 134         { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_SRGB, },
 135         { MEDIA_BUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB, },
 136         { MEDIA_BUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB, },
 137         { MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB, },
 138         { MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_COLORSPACE_SRGB, },
 139         { MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_COLORSPACE_SRGB, },
 140         { MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_COLORSPACE_SRGB, },
 141 };
 142
 143 /*
 144  * FIXME: remove this when a subdev API becomes available
 145  * to set the MIPI CSI-2 virtual channel.
 146  */
 147 static unsigned int virtual_channel;
 148 module_param(virtual_channel, uint, 0444);
 149 MODULE_PARM_DESC(virtual_channel,
 150                  "MIPI CSI-2 virtual channel (0..3), default 0");
 151
 152 static const int ov5640_framerates[] = {
 153         [OV5640_15_FPS] = 15,
 154         [OV5640_30_FPS] = 30,
 155         [OV5640_60_FPS] = 60,
 156 };
 157
 158 /* regulator supplies */
 159 static const char * const ov5640_supply_name[] = {
 160         "DOVDD", /* Digital I/O (1.8V) supply */
 161         "AVDD",  /* Analog (2.8V) supply */
 162         "DVDD",  /* Digital Core (1.5V) supply */
 163 };
 164
 165 #define OV5640_NUM_SUPPLIES ARRAY_SIZE(ov5640_supply_name)
 166
 167 /*
 168  * Image size under 1280 * 960 are SUBSAMPLING
 169  * Image size upper 1280 * 960 are SCALING
 170  */
 171 enum ov5640_downsize_mode {
 172         SUBSAMPLING,
 173         SCALING,
 174 };
 175
 176 struct reg_value {
 177         u16 reg_addr;
 178         u8 val;
 179         u8 mask;
 180         u32 delay_ms;
 181 };
 182
 183 struct ov5640_mode_info {
 184         enum ov5640_mode_id id;
 185         enum ov5640_downsize_mode dn_mode;
 186         u32 hact;
 187         u32 htot;
 188         u32 vact;
 189         u32 vtot;
 190         const struct reg_value *reg_data;
 191         u32 reg_data_size;
 192 };
 193
 194 struct ov5640_ctrls {
 195         struct v4l2_ctrl_handler handler;
 196         struct v4l2_ctrl *pixel_rate;
 197         struct {
 198                 struct v4l2_ctrl *auto_exp;
 199                 struct v4l2_ctrl *exposure;
 200         };
 201         struct {
 202                 struct v4l2_ctrl *auto_wb;
 203                 struct v4l2_ctrl *blue_balance;
 204                 struct v4l2_ctrl *red_balance;
 205         };
 206         struct {
 207                 struct v4l2_ctrl *auto_gain;
 208                 struct v4l2_ctrl *gain;
 209         };
 210         struct v4l2_ctrl *brightness;
 211         struct v4l2_ctrl *light_freq;
 212         struct v4l2_ctrl *saturation;
 213         struct v4l2_ctrl *contrast;
 214         struct v4l2_ctrl *hue;
 215         struct v4l2_ctrl *test_pattern;
 216         struct v4l2_ctrl *hflip;
 217         struct v4l2_ctrl *vflip;
 218 };
 219
 220 struct ov5640_dev {
 221         struct i2c_client *i2c_client;
 222         struct v4l2_subdev sd;
 223         struct media_pad pad;
 224         struct v4l2_fwnode_endpoint ep; /* the parsed DT endpoint info */
 225         struct clk *xclk; /* system clock to OV5640 */
 226         u32 xclk_freq;
 227
 228         struct regulator_bulk_data supplies[OV5640_NUM_SUPPLIES];
 229         struct gpio_desc *reset_gpio;
 230         struct gpio_desc *pwdn_gpio;
 231         bool   upside_down;
 232
 233         /* lock to protect all members below */
 234         struct mutex lock;
 235
 236         int power_count;
 237
 238         struct v4l2_mbus_framefmt fmt;
 239         bool pending_fmt_change;
 240
 241         const struct ov5640_mode_info *current_mode;
 242         const struct ov5640_mode_info *last_mode;
 243         enum ov5640_frame_rate current_fr;
 244         struct v4l2_fract frame_interval;
 245
 246         struct ov5640_ctrls ctrls;
 247
 248         u32 prev_sysclk, prev_hts;
 249         u32 ae_low, ae_high, ae_target;
 250
 251         bool pending_mode_change;
 252         bool streaming;
 253 };
 254
 255 static inline struct ov5640_dev *to_ov5640_dev(struct v4l2_subdev *sd)
 256 {
 257         return container_of(sd, struct ov5640_dev, sd);
 258 }
 259
 260 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
 261 {
 262         return &container_of(ctrl->handler, struct ov5640_dev,
 263                              ctrls.handler)->sd;
 264 }
 265
 266 /*
 267  * FIXME: all of these register tables are likely filled with
 268  * entries that set the register to their power-on default values,
 269  * and which are otherwise not touched by this driver. Those entries
 270  * should be identified and removed to speed register load time
 271  * over i2c.
 272  */
 273 /* YUV422 UYVY VGA@30fps */
 274 static const struct reg_value ov5640_init_setting_30fps_VGA[] = {
 275         {0x3103, 0x11, 0, 0}, {0x3008, 0x82, 0, 5}, {0x3008, 0x42, 0, 0},
 276         {0x3103, 0x03, 0, 0}, {0x3017, 0x00, 0, 0}, {0x3018, 0x00, 0, 0},
 277         {0x3630, 0x36, 0, 0},
 278         {0x3631, 0x0e, 0, 0}, {0x3632, 0xe2, 0, 0}, {0x3633, 0x12, 0, 0},
 279         {0x3621, 0xe0, 0, 0}, {0x3704, 0xa0, 0, 0}, {0x3703, 0x5a, 0, 0},
 280         {0x3715, 0x78, 0, 0}, {0x3717, 0x01, 0, 0}, {0x370b, 0x60, 0, 0},
 281         {0x3705, 0x1a, 0, 0}, {0x3905, 0x02, 0, 0}, {0x3906, 0x10, 0, 0},
 282         {0x3901, 0x0a, 0, 0}, {0x3731, 0x12, 0, 0}, {0x3600, 0x08, 0, 0},
 283         {0x3601, 0x33, 0, 0}, {0x302d, 0x60, 0, 0}, {0x3620, 0x52, 0, 0},
 284         {0x371b, 0x20, 0, 0}, {0x471c, 0x50, 0, 0}, {0x3a13, 0x43, 0, 0},
 285         {0x3a18, 0x00, 0, 0}, {0x3a19, 0xf8, 0, 0}, {0x3635, 0x13, 0, 0},
 286         {0x3636, 0x03, 0, 0}, {0x3634, 0x40, 0, 0}, {0x3622, 0x01, 0, 0},
 287         {0x3c01, 0xa4, 0, 0}, {0x3c04, 0x28, 0, 0}, {0x3c05, 0x98, 0, 0},
 288         {0x3c06, 0x00, 0, 0}, {0x3c07, 0x08, 0, 0}, {0x3c08, 0x00, 0, 0},
 289         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 290         {0x3820, 0x41, 0, 0}, {0x3821, 0x07, 0, 0}, {0x3814, 0x31, 0, 0},
 291         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 292         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 293         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 294         {0x3810, 0x00, 0, 0},
 295         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 296         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 297         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 298         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 299         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 300         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 301         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0}, {0x3000, 0x00, 0, 0},
 302         {0x3002, 0x1c, 0, 0}, {0x3004, 0xff, 0, 0}, {0x3006, 0xc3, 0, 0},
 303         {0x302e, 0x08, 0, 0}, {0x4300, 0x3f, 0, 0},
 304         {0x501f, 0x00, 0, 0}, {0x4407, 0x04, 0, 0},
 305         {0x440e, 0x00, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 306         {0x4837, 0x0a, 0, 0}, {0x3824, 0x02, 0, 0},
 307         {0x5000, 0xa7, 0, 0}, {0x5001, 0xa3, 0, 0}, {0x5180, 0xff, 0, 0},
 308         {0x5181, 0xf2, 0, 0}, {0x5182, 0x00, 0, 0}, {0x5183, 0x14, 0, 0},
 309         {0x5184, 0x25, 0, 0}, {0x5185, 0x24, 0, 0}, {0x5186, 0x09, 0, 0},
 310         {0x5187, 0x09, 0, 0}, {0x5188, 0x09, 0, 0}, {0x5189, 0x88, 0, 0},
 311         {0x518a, 0x54, 0, 0}, {0x518b, 0xee, 0, 0}, {0x518c, 0xb2, 0, 0},
 312         {0x518d, 0x50, 0, 0}, {0x518e, 0x34, 0, 0}, {0x518f, 0x6b, 0, 0},
 313         {0x5190, 0x46, 0, 0}, {0x5191, 0xf8, 0, 0}, {0x5192, 0x04, 0, 0},
 314         {0x5193, 0x70, 0, 0}, {0x5194, 0xf0, 0, 0}, {0x5195, 0xf0, 0, 0},
 315         {0x5196, 0x03, 0, 0}, {0x5197, 0x01, 0, 0}, {0x5198, 0x04, 0, 0},
 316         {0x5199, 0x6c, 0, 0}, {0x519a, 0x04, 0, 0}, {0x519b, 0x00, 0, 0},
 317         {0x519c, 0x09, 0, 0}, {0x519d, 0x2b, 0, 0}, {0x519e, 0x38, 0, 0},
 318         {0x5381, 0x1e, 0, 0}, {0x5382, 0x5b, 0, 0}, {0x5383, 0x08, 0, 0},
 319         {0x5384, 0x0a, 0, 0}, {0x5385, 0x7e, 0, 0}, {0x5386, 0x88, 0, 0},
 320         {0x5387, 0x7c, 0, 0}, {0x5388, 0x6c, 0, 0}, {0x5389, 0x10, 0, 0},
 321         {0x538a, 0x01, 0, 0}, {0x538b, 0x98, 0, 0}, {0x5300, 0x08, 0, 0},
 322         {0x5301, 0x30, 0, 0}, {0x5302, 0x10, 0, 0}, {0x5303, 0x00, 0, 0},
 323         {0x5304, 0x08, 0, 0}, {0x5305, 0x30, 0, 0}, {0x5306, 0x08, 0, 0},
 324         {0x5307, 0x16, 0, 0}, {0x5309, 0x08, 0, 0}, {0x530a, 0x30, 0, 0},
 325         {0x530b, 0x04, 0, 0}, {0x530c, 0x06, 0, 0}, {0x5480, 0x01, 0, 0},
 326         {0x5481, 0x08, 0, 0}, {0x5482, 0x14, 0, 0}, {0x5483, 0x28, 0, 0},
 327         {0x5484, 0x51, 0, 0}, {0x5485, 0x65, 0, 0}, {0x5486, 0x71, 0, 0},
 328         {0x5487, 0x7d, 0, 0}, {0x5488, 0x87, 0, 0}, {0x5489, 0x91, 0, 0},
 329         {0x548a, 0x9a, 0, 0}, {0x548b, 0xaa, 0, 0}, {0x548c, 0xb8, 0, 0},
 330         {0x548d, 0xcd, 0, 0}, {0x548e, 0xdd, 0, 0}, {0x548f, 0xea, 0, 0},
 331         {0x5490, 0x1d, 0, 0}, {0x5580, 0x02, 0, 0}, {0x5583, 0x40, 0, 0},
 332         {0x5584, 0x10, 0, 0}, {0x5589, 0x10, 0, 0}, {0x558a, 0x00, 0, 0},
 333         {0x558b, 0xf8, 0, 0}, {0x5800, 0x23, 0, 0}, {0x5801, 0x14, 0, 0},
 334         {0x5802, 0x0f, 0, 0}, {0x5803, 0x0f, 0, 0}, {0x5804, 0x12, 0, 0},
 335         {0x5805, 0x26, 0, 0}, {0x5806, 0x0c, 0, 0}, {0x5807, 0x08, 0, 0},
 336         {0x5808, 0x05, 0, 0}, {0x5809, 0x05, 0, 0}, {0x580a, 0x08, 0, 0},
 337         {0x580b, 0x0d, 0, 0}, {0x580c, 0x08, 0, 0}, {0x580d, 0x03, 0, 0},
 338         {0x580e, 0x00, 0, 0}, {0x580f, 0x00, 0, 0}, {0x5810, 0x03, 0, 0},
 339         {0x5811, 0x09, 0, 0}, {0x5812, 0x07, 0, 0}, {0x5813, 0x03, 0, 0},
 340         {0x5814, 0x00, 0, 0}, {0x5815, 0x01, 0, 0}, {0x5816, 0x03, 0, 0},
 341         {0x5817, 0x08, 0, 0}, {0x5818, 0x0d, 0, 0}, {0x5819, 0x08, 0, 0},
 342         {0x581a, 0x05, 0, 0}, {0x581b, 0x06, 0, 0}, {0x581c, 0x08, 0, 0},
 343         {0x581d, 0x0e, 0, 0}, {0x581e, 0x29, 0, 0}, {0x581f, 0x17, 0, 0},
 344         {0x5820, 0x11, 0, 0}, {0x5821, 0x11, 0, 0}, {0x5822, 0x15, 0, 0},
 345         {0x5823, 0x28, 0, 0}, {0x5824, 0x46, 0, 0}, {0x5825, 0x26, 0, 0},
 346         {0x5826, 0x08, 0, 0}, {0x5827, 0x26, 0, 0}, {0x5828, 0x64, 0, 0},
 347         {0x5829, 0x26, 0, 0}, {0x582a, 0x24, 0, 0}, {0x582b, 0x22, 0, 0},
 348         {0x582c, 0x24, 0, 0}, {0x582d, 0x24, 0, 0}, {0x582e, 0x06, 0, 0},
 349         {0x582f, 0x22, 0, 0}, {0x5830, 0x40, 0, 0}, {0x5831, 0x42, 0, 0},
 350         {0x5832, 0x24, 0, 0}, {0x5833, 0x26, 0, 0}, {0x5834, 0x24, 0, 0},
 351         {0x5835, 0x22, 0, 0}, {0x5836, 0x22, 0, 0}, {0x5837, 0x26, 0, 0},
 352         {0x5838, 0x44, 0, 0}, {0x5839, 0x24, 0, 0}, {0x583a, 0x26, 0, 0},
 353         {0x583b, 0x28, 0, 0}, {0x583c, 0x42, 0, 0}, {0x583d, 0xce, 0, 0},
 354         {0x5025, 0x00, 0, 0}, {0x3a0f, 0x30, 0, 0}, {0x3a10, 0x28, 0, 0},
 355         {0x3a1b, 0x30, 0, 0}, {0x3a1e, 0x26, 0, 0}, {0x3a11, 0x60, 0, 0},
 356         {0x3a1f, 0x14, 0, 0}, {0x3008, 0x02, 0, 0}, {0x3c00, 0x04, 0, 300},
 357 };
 358
 359 static const struct reg_value ov5640_setting_VGA_640_480[] = {
 360         {0x3c07, 0x08, 0, 0},
 361         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 362         {0x3814, 0x31, 0, 0},
 363         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 364         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 365         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 366         {0x3810, 0x00, 0, 0},
 367         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 368         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 369         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 370         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 371         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 372         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 373         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 374         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 375         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 376 };
 377
 378 static const struct reg_value ov5640_setting_XGA_1024_768[] = {
 379         {0x3c07, 0x08, 0, 0},
 380         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 381         {0x3814, 0x31, 0, 0},
 382         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 383         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 384         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 385         {0x3810, 0x00, 0, 0},
 386         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 387         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 388         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 389         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 390         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 391         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 392         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 393         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 394         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 395 };
 396
 397 static const struct reg_value ov5640_setting_QVGA_320_240[] = {
 398         {0x3c07, 0x08, 0, 0},
 399         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 400         {0x3814, 0x31, 0, 0},
 401         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 402         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 403         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 404         {0x3810, 0x00, 0, 0},
 405         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 406         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 407         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 408         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 409         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 410         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 411         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 412         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 413         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 414 };
 415
 416 static const struct reg_value ov5640_setting_QCIF_176_144[] = {
 417         {0x3c07, 0x08, 0, 0},
 418         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 419         {0x3814, 0x31, 0, 0},
 420         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 421         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 422         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 423         {0x3810, 0x00, 0, 0},
 424         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 425         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 426         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 427         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 428         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 429         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 430         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 431         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 432         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 433 };
 434
 435 static const struct reg_value ov5640_setting_NTSC_720_480[] = {
 436         {0x3c07, 0x08, 0, 0},
 437         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 438         {0x3814, 0x31, 0, 0},
 439         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 440         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 441         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 442         {0x3810, 0x00, 0, 0},
 443         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x3c, 0, 0},
 444         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 445         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 446         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 447         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 448         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 449         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 450         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 451         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 452 };
 453
 454 static const struct reg_value ov5640_setting_PAL_720_576[] = {
 455         {0x3c07, 0x08, 0, 0},
 456         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 457         {0x3814, 0x31, 0, 0},
 458         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 459         {0x3802, 0x00, 0, 0}, {0x3803, 0x04, 0, 0}, {0x3804, 0x0a, 0, 0},
 460         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9b, 0, 0},
 461         {0x3810, 0x00, 0, 0},
 462         {0x3811, 0x38, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x06, 0, 0},
 463         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 464         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x03, 0, 0},
 465         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 466         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 467         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 468         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 469         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 470         {0x3824, 0x02, 0, 0}, {0x5001, 0xa3, 0, 0},
 471 };
 472
 473 static const struct reg_value ov5640_setting_720P_1280_720[] = {
 474         {0x3c07, 0x07, 0, 0},
 475         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 476         {0x3814, 0x31, 0, 0},
 477         {0x3815, 0x31, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 478         {0x3802, 0x00, 0, 0}, {0x3803, 0xfa, 0, 0}, {0x3804, 0x0a, 0, 0},
 479         {0x3805, 0x3f, 0, 0}, {0x3806, 0x06, 0, 0}, {0x3807, 0xa9, 0, 0},
 480         {0x3810, 0x00, 0, 0},
 481         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x04, 0, 0},
 482         {0x3618, 0x00, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x64, 0, 0},
 483         {0x3709, 0x52, 0, 0}, {0x370c, 0x03, 0, 0}, {0x3a02, 0x02, 0, 0},
 484         {0x3a03, 0xe4, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0xbc, 0, 0},
 485         {0x3a0a, 0x01, 0, 0}, {0x3a0b, 0x72, 0, 0}, {0x3a0e, 0x01, 0, 0},
 486         {0x3a0d, 0x02, 0, 0}, {0x3a14, 0x02, 0, 0}, {0x3a15, 0xe4, 0, 0},
 487         {0x4001, 0x02, 0, 0}, {0x4004, 0x02, 0, 0},
 488         {0x4407, 0x04, 0, 0}, {0x460b, 0x37, 0, 0}, {0x460c, 0x20, 0, 0},
 489         {0x3824, 0x04, 0, 0}, {0x5001, 0x83, 0, 0},
 490 };
 491
 492 static const struct reg_value ov5640_setting_1080P_1920_1080[] = {
 493         {0x3c07, 0x08, 0, 0},
 494         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 495         {0x3814, 0x11, 0, 0},
 496         {0x3815, 0x11, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 497         {0x3802, 0x00, 0, 0}, {0x3803, 0x00, 0, 0}, {0x3804, 0x0a, 0, 0},
 498         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9f, 0, 0},
 499         {0x3810, 0x00, 0, 0},
 500         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x04, 0, 0},
 501         {0x3618, 0x04, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x21, 0, 0},
 502         {0x3709, 0x12, 0, 0}, {0x370c, 0x00, 0, 0}, {0x3a02, 0x03, 0, 0},
 503         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 504         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 505         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 506         {0x4001, 0x02, 0, 0}, {0x4004, 0x06, 0, 0},
 507         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 508         {0x3824, 0x02, 0, 0}, {0x5001, 0x83, 0, 0},
 509         {0x3c07, 0x07, 0, 0}, {0x3c08, 0x00, 0, 0},
 510         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 511         {0x3800, 0x01, 0, 0}, {0x3801, 0x50, 0, 0}, {0x3802, 0x01, 0, 0},
 512         {0x3803, 0xb2, 0, 0}, {0x3804, 0x08, 0, 0}, {0x3805, 0xef, 0, 0},
 513         {0x3806, 0x05, 0, 0}, {0x3807, 0xf1, 0, 0},
 514         {0x3612, 0x2b, 0, 0}, {0x3708, 0x64, 0, 0},
 515         {0x3a02, 0x04, 0, 0}, {0x3a03, 0x60, 0, 0}, {0x3a08, 0x01, 0, 0},
 516         {0x3a09, 0x50, 0, 0}, {0x3a0a, 0x01, 0, 0}, {0x3a0b, 0x18, 0, 0},
 517         {0x3a0e, 0x03, 0, 0}, {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x04, 0, 0},
 518         {0x3a15, 0x60, 0, 0}, {0x4407, 0x04, 0, 0},
 519         {0x460b, 0x37, 0, 0}, {0x460c, 0x20, 0, 0}, {0x3824, 0x04, 0, 0},
 520         {0x4005, 0x1a, 0, 0},
 521 };
 522
 523 static const struct reg_value ov5640_setting_QSXGA_2592_1944[] = {
 524         {0x3c07, 0x08, 0, 0},
 525         {0x3c09, 0x1c, 0, 0}, {0x3c0a, 0x9c, 0, 0}, {0x3c0b, 0x40, 0, 0},
 526         {0x3814, 0x11, 0, 0},
 527         {0x3815, 0x11, 0, 0}, {0x3800, 0x00, 0, 0}, {0x3801, 0x00, 0, 0},
 528         {0x3802, 0x00, 0, 0}, {0x3803, 0x00, 0, 0}, {0x3804, 0x0a, 0, 0},
 529         {0x3805, 0x3f, 0, 0}, {0x3806, 0x07, 0, 0}, {0x3807, 0x9f, 0, 0},
 530         {0x3810, 0x00, 0, 0},
 531         {0x3811, 0x10, 0, 0}, {0x3812, 0x00, 0, 0}, {0x3813, 0x04, 0, 0},
 532         {0x3618, 0x04, 0, 0}, {0x3612, 0x29, 0, 0}, {0x3708, 0x21, 0, 0},
 533         {0x3709, 0x12, 0, 0}, {0x370c, 0x00, 0, 0}, {0x3a02, 0x03, 0, 0},
 534         {0x3a03, 0xd8, 0, 0}, {0x3a08, 0x01, 0, 0}, {0x3a09, 0x27, 0, 0},
 535         {0x3a0a, 0x00, 0, 0}, {0x3a0b, 0xf6, 0, 0}, {0x3a0e, 0x03, 0, 0},
 536         {0x3a0d, 0x04, 0, 0}, {0x3a14, 0x03, 0, 0}, {0x3a15, 0xd8, 0, 0},
 537         {0x4001, 0x02, 0, 0}, {0x4004, 0x06, 0, 0},
 538         {0x4407, 0x04, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
 539         {0x3824, 0x02, 0, 0}, {0x5001, 0x83, 0, 70},
 540 };
 541
 542 /* power-on sensor init reg table */
 543 static const struct ov5640_mode_info ov5640_mode_init_data = {
 544         0, SUBSAMPLING, 640, 1896, 480, 984,
 545         ov5640_init_setting_30fps_VGA,
 546         ARRAY_SIZE(ov5640_init_setting_30fps_VGA),
 547 };
 548
 549 static const struct ov5640_mode_info
 550 ov5640_mode_data[OV5640_NUM_MODES] = {
 551         {OV5640_MODE_QCIF_176_144, SUBSAMPLING,
 552          176, 1896, 144, 984,
 553          ov5640_setting_QCIF_176_144,
 554          ARRAY_SIZE(ov5640_setting_QCIF_176_144)},
 555         {OV5640_MODE_QVGA_320_240, SUBSAMPLING,
 556          320, 1896, 240, 984,
 557          ov5640_setting_QVGA_320_240,
 558          ARRAY_SIZE(ov5640_setting_QVGA_320_240)},
 559         {OV5640_MODE_VGA_640_480, SUBSAMPLING,
 560          640, 1896, 480, 1080,
 561          ov5640_setting_VGA_640_480,
 562          ARRAY_SIZE(ov5640_setting_VGA_640_480)},
 563         {OV5640_MODE_NTSC_720_480, SUBSAMPLING,
 564          720, 1896, 480, 984,
 565          ov5640_setting_NTSC_720_480,
 566          ARRAY_SIZE(ov5640_setting_NTSC_720_480)},
 567         {OV5640_MODE_PAL_720_576, SUBSAMPLING,
 568          720, 1896, 576, 984,
 569          ov5640_setting_PAL_720_576,
 570          ARRAY_SIZE(ov5640_setting_PAL_720_576)},
 571         {OV5640_MODE_XGA_1024_768, SUBSAMPLING,
 572          1024, 1896, 768, 1080,
 573          ov5640_setting_XGA_1024_768,
 574          ARRAY_SIZE(ov5640_setting_XGA_1024_768)},
 575         {OV5640_MODE_720P_1280_720, SUBSAMPLING,
 576          1280, 1892, 720, 740,
 577          ov5640_setting_720P_1280_720,
 578          ARRAY_SIZE(ov5640_setting_720P_1280_720)},
 579         {OV5640_MODE_1080P_1920_1080, SCALING,
 580          1920, 2500, 1080, 1120,
 581          ov5640_setting_1080P_1920_1080,
 582          ARRAY_SIZE(ov5640_setting_1080P_1920_1080)},
 583         {OV5640_MODE_QSXGA_2592_1944, SCALING,
 584          2592, 2844, 1944, 1968,
 585          ov5640_setting_QSXGA_2592_1944,
 586          ARRAY_SIZE(ov5640_setting_QSXGA_2592_1944)},
 587 };
 588
 589 static int ov5640_init_slave_id(struct ov5640_dev *sensor)
 590 {
 591         struct i2c_client *client = sensor->i2c_client;
 592         struct i2c_msg msg;
 593         u8 buf[3];
 594         int ret;
 595
 596         if (client->addr == OV5640_DEFAULT_SLAVE_ID)
 597                 return 0;
 598
 599         buf[0] = OV5640_REG_SLAVE_ID >> 8;
 600         buf[1] = OV5640_REG_SLAVE_ID & 0xff;
 601         buf[2] = client->addr << 1;
 602
 603         msg.addr = OV5640_DEFAULT_SLAVE_ID;
 604         msg.flags = 0;
 605         msg.buf = buf;
 606         msg.len = sizeof(buf);
 607
 608         ret = i2c_transfer(client->adapter, &msg, 1);
 609         if (ret < 0) {
 610                 dev_err(&client->dev, "%s: failed with %d\n", __func__, ret);
 611                 return ret;
 612         }
 613
 614         return 0;
 615 }
 616
 617 static int ov5640_write_reg(struct ov5640_dev *sensor, u16 reg, u8 val)
 618 {
 619         struct i2c_client *client = sensor->i2c_client;
 620         struct i2c_msg msg;
 621         u8 buf[3];
 622         int ret;
 623
 624         buf[0] = reg >> 8;
 625         buf[1] = reg & 0xff;
 626         buf[2] = val;
 627
 628         msg.addr = client->addr;
 629         msg.flags = client->flags;
 630         msg.buf = buf;
 631         msg.len = sizeof(buf);
 632
 633         ret = i2c_transfer(client->adapter, &msg, 1);
 634         if (ret < 0) {
 635                 dev_err(&client->dev, "%s: error: reg=%x, val=%x\n",
 636                         __func__, reg, val);
 637                 return ret;
 638         }
 639
 640         return 0;
 641 }
 642
 643 static int ov5640_read_reg(struct ov5640_dev *sensor, u16 reg, u8 *val)
 644 {
 645         struct i2c_client *client = sensor->i2c_client;
 646         struct i2c_msg msg[2];
 647         u8 buf[2];
 648         int ret;
 649
 650         buf[0] = reg >> 8;
 651         buf[1] = reg & 0xff;
 652
 653         msg[0].addr = client->addr;
 654         msg[0].flags = client->flags;
 655         msg[0].buf = buf;
 656         msg[0].len = sizeof(buf);
 657
 658         msg[1].addr = client->addr;
 659         msg[1].flags = client->flags | I2C_M_RD;
 660         msg[1].buf = buf;
 661         msg[1].len = 1;
 662
 663         ret = i2c_transfer(client->adapter, msg, 2);
 664         if (ret < 0) {
 665                 dev_err(&client->dev, "%s: error: reg=%x\n",
 666                         __func__, reg);
 667                 return ret;
 668         }
 669
 670         *val = buf[0];
 671         return 0;
 672 }
 673
 674 static int ov5640_read_reg16(struct ov5640_dev *sensor, u16 reg, u16 *val)
 675 {
 676         u8 hi, lo;
 677         int ret;
 678
 679         ret = ov5640_read_reg(sensor, reg, &hi);
 680         if (ret)
 681                 return ret;
 682         ret = ov5640_read_reg(sensor, reg + 1, &lo);
 683         if (ret)
 684                 return ret;
 685
 686         *val = ((u16)hi << 8) | (u16)lo;
 687         return 0;
 688 }
 689
 690 static int ov5640_write_reg16(struct ov5640_dev *sensor, u16 reg, u16 val)
 691 {
 692         int ret;
 693
 694         ret = ov5640_write_reg(sensor, reg, val >> 8);
 695         if (ret)
 696                 return ret;
 697
 698         return ov5640_write_reg(sensor, reg + 1, val & 0xff);
 699 }
 700
 701 static int ov5640_mod_reg(struct ov5640_dev *sensor, u16 reg,
 702                           u8 mask, u8 val)
 703 {
 704         u8 readval;
 705         int ret;
 706
 707         ret = ov5640_read_reg(sensor, reg, &readval);
 708         if (ret)
 709                 return ret;
 710
 711         readval &= ~mask;
 712         val &= mask;
 713         val |= readval;
 714
 715         return ov5640_write_reg(sensor, reg, val);
 716 }
 717
 718 /*
 719  * After trying the various combinations, reading various
 720  * documentations spread around the net, and from the various
 721  * feedback, the clock tree is probably as follows:
 722  *
 723  *   +--------------+
 724  *   |  Ext. Clock  |
 725  *   +-+------------+
 726  *     |  +----------+
 727  *     +->|   PLL1   | - reg 0x3036, for the multiplier
 728  *        +-+--------+ - reg 0x3037, bits 0-3 for the pre-divider
 729  *          |  +--------------+
 730  *          +->| System Clock |  - reg 0x3035, bits 4-7
 731  *             +-+------------+
 732  *               |  +--------------+
 733  *               +->| MIPI Divider | - reg 0x3035, bits 0-3
 734  *               |  +-+------------+
 735  *               |    +----------------> MIPI SCLK
 736  *               |    +  +-----+
 737  *               |    +->| / 2 |-------> MIPI BIT CLK
 738  *               |       +-----+
 739  *               |  +--------------+
 740  *               +->| PLL Root Div | - reg 0x3037, bit 4
 741  *                  +-+------------+
 742  *                    |  +---------+
 743  *                    +->| Bit Div | - reg 0x3035, bits 0-3
 744  *                       +-+-------+
 745  *                         |  +-------------+
 746  *                         +->| SCLK Div    | - reg 0x3108, bits 0-1
 747  *                         |  +-+-----------+
 748  *                         |    +---------------> SCLK
 749  *                         |  +-------------+
 750  *                         +->| SCLK 2X Div | - reg 0x3108, bits 2-3
 751  *                         |  +-+-----------+
 752  *                         |    +---------------> SCLK 2X
 753  *                         |  +-------------+
 754  *                         +->| PCLK Div    | - reg 0x3108, bits 4-5
 755  *                            ++------------+
 756  *                             +  +-----------+
 757  *                             +->|   P_DIV   | - reg 0x3035, bits 0-3
 758  *                                +-----+-----+
 759  *                                       +------------> PCLK
 760  *
 761  * This is deviating from the datasheet at least for the register
 762  * 0x3108, since it's said here that the PCLK would be clocked from
 763  * the PLL.
 764  *
 765  * There seems to be also (unverified) constraints:
 766  *  - the PLL pre-divider output rate should be in the 4-27MHz range
 767  *  - the PLL multiplier output rate should be in the 500-1000MHz range
 768  *  - PCLK >= SCLK * 2 in YUV, >= SCLK in Raw or JPEG
 769  *
 770  * In the two latter cases, these constraints are met since our
 771  * factors are hardcoded. If we were to change that, we would need to
 772  * take this into account. The only varying parts are the PLL
 773  * multiplier and the system clock divider, which are shared between
 774  * all these clocks so won't cause any issue.
 775  */
 776
 777 /*
 778  * This is supposed to be ranging from 1 to 8, but the value is always
 779  * set to 3 in the vendor kernels.
 780  */
 781 #define OV5640_PLL_PREDIV       3
 782
 783 #define OV5640_PLL_MULT_MIN     4
 784 #define OV5640_PLL_MULT_MAX     252
 785
 786 /*
 787  * This is supposed to be ranging from 1 to 16, but the value is
 788  * always set to either 1 or 2 in the vendor kernels.
 789  */
 790 #define OV5640_SYSDIV_MIN       1
 791 #define OV5640_SYSDIV_MAX       16
 792
 793 /*
 794  * Hardcode these values for scaler and non-scaler modes.
 795  * FIXME: to be re-calcualted for 1 data lanes setups
 796  */
 797 #define OV5640_MIPI_DIV_PCLK    2
 798 #define OV5640_MIPI_DIV_SCLK    1
 799
 800 /*
 801  * This is supposed to be ranging from 1 to 2, but the value is always
 802  * set to 2 in the vendor kernels.
 803  */
 804 #define OV5640_PLL_ROOT_DIV                     2
 805 #define OV5640_PLL_CTRL3_PLL_ROOT_DIV_2         BIT(4)
 806
 807 /*
 808  * We only supports 8-bit formats at the moment
 809  */
 810 #define OV5640_BIT_DIV                          2
 811 #define OV5640_PLL_CTRL0_MIPI_MODE_8BIT         0x08
 812
 813 /*
 814  * This is supposed to be ranging from 1 to 8, but the value is always
 815  * set to 2 in the vendor kernels.
 816  */
 817 #define OV5640_SCLK_ROOT_DIV    2
 818
 819 /*
 820  * This is hardcoded so that the consistency is maintained between SCLK and
 821  * SCLK 2x.
 822  */
 823 #define OV5640_SCLK2X_ROOT_DIV (OV5640_SCLK_ROOT_DIV / 2)
 824
 825 /*
 826  * This is supposed to be ranging from 1 to 8, but the value is always
 827  * set to 1 in the vendor kernels.
 828  */
 829 #define OV5640_PCLK_ROOT_DIV                    1
 830 #define OV5640_PLL_SYS_ROOT_DIVIDER_BYPASS      0x00
 831
 832 static unsigned long ov5640_compute_sys_clk(struct ov5640_dev *sensor,
 833                                             u8 pll_prediv, u8 pll_mult,
 834                                             u8 sysdiv)
 835 {
 836         unsigned long sysclk = sensor->xclk_freq / pll_prediv * pll_mult;
 837
 838         /* PLL1 output cannot exceed 1GHz. */
 839         if (sysclk / 1000000 > 1000)
 840                 return 0;
 841
 842         return sysclk / sysdiv;
 843 }
 844
 845 static unsigned long ov5640_calc_sys_clk(struct ov5640_dev *sensor,
 846                                          unsigned long rate,
 847                                          u8 *pll_prediv, u8 *pll_mult,
 848                                          u8 *sysdiv)
 849 {
 850         unsigned long best = ~0;
 851         u8 best_sysdiv = 1, best_mult = 1;
 852         u8 _sysdiv, _pll_mult;
 853
 854         for (_sysdiv = OV5640_SYSDIV_MIN;
 855              _sysdiv <= OV5640_SYSDIV_MAX;
 856              _sysdiv++) {
 857                 for (_pll_mult = OV5640_PLL_MULT_MIN;
 858                      _pll_mult <= OV5640_PLL_MULT_MAX;
 859                      _pll_mult++) {
 860                         unsigned long _rate;
 861
 862                         /*
 863                          * The PLL multiplier cannot be odd if above
 864                          * 127.
 865                          */
 866                         if (_pll_mult > 127 && (_pll_mult % 2))
 867                                 continue;
 868
 869                         _rate = ov5640_compute_sys_clk(sensor,
 870                                                        OV5640_PLL_PREDIV,
 871                                                        _pll_mult, _sysdiv);
 872
 873                         /*
 874                          * We have reached the maximum allowed PLL1 output,
 875                          * increase sysdiv.
 876                          */
 877                         if (!rate)
 878                                 break;
 879
 880                         /*
 881                          * Prefer rates above the expected clock rate than
 882                          * below, even if that means being less precise.
 883                          */
 884                         if (_rate < rate)
 885                                 continue;
 886
 887                         if (abs(rate - _rate) < abs(rate - best)) {
 888                                 best = _rate;
 889                                 best_sysdiv = _sysdiv;
 890                                 best_mult = _pll_mult;
 891                         }
 892
 893                         if (_rate == rate)
 894                                 goto out;
 895                 }
 896         }
 897
 898 out:
 899         *sysdiv = best_sysdiv;
 900         *pll_prediv = OV5640_PLL_PREDIV;
 901         *pll_mult = best_mult;
 902
 903         return best;
 904 }
 905
 906 /*
 907  * ov5640_set_mipi_pclk() - Calculate the clock tree configuration values
 908  *                          for the MIPI CSI-2 output.
 909  *
 910  * @rate: The requested bandwidth per lane in bytes per second.
 911  *        'Bandwidth Per Lane' is calculated as:
 912  *        bpl = HTOT * VTOT * FPS * bpp / num_lanes;
 913  *
 914  * This function use the requested bandwidth to calculate:
 915  * - sample_rate = bpl / (bpp / num_lanes);
 916  *               = bpl / (PLL_RDIV * BIT_DIV * PCLK_DIV * MIPI_DIV / num_lanes);
 917  *
 918  * - mipi_sclk   = bpl / MIPI_DIV / 2; ( / 2 is for CSI-2 DDR)
 919  *
 920  * with these fixed parameters:
 921  *      PLL_RDIV        = 2;
 922  *      BIT_DIVIDER     = 2; (MIPI_BIT_MODE == 8 ? 2 : 2,5);
 923  *      PCLK_DIV        = 1;
 924  *
 925  * The MIPI clock generation differs for modes that use the scaler and modes
 926  * that do not. In case the scaler is in use, the MIPI_SCLK generates the MIPI
 927  * BIT CLk, and thus:
 928  *
 929  * - mipi_sclk = bpl / MIPI_DIV / 2;
 930  *   MIPI_DIV = 1;
 931  *
 932  * For modes that do not go through the scaler, the MIPI BIT CLOCK is generated
 933  * from the pixel clock, and thus:
 934  *
 935  * - sample_rate = bpl / (bpp / num_lanes);
 936  *               = bpl / (2 * 2 * 1 * MIPI_DIV / num_lanes);
 937  *               = bpl / (4 * MIPI_DIV / num_lanes);
 938  * - MIPI_DIV    = bpp / (4 * num_lanes);
 939  *
 940  * FIXME: this have been tested with 16bpp and 2 lanes setup only.
 941  * MIPI_DIV is fixed to value 2, but it -might- be changed according to the
 942  * above formula for setups with 1 lane or image formats with different bpp.
 943  *
 944  * FIXME: this deviates from the sensor manual documentation which is quite
 945  * thin on the MIPI clock tree generation part.
 946  */
 947 static int ov5640_set_mipi_pclk(struct ov5640_dev *sensor,
 948                                 unsigned long rate)
 949 {
 950         const struct ov5640_mode_info *mode = sensor->current_mode;
 951         u8 prediv, mult, sysdiv;
 952         u8 mipi_div;
 953         int ret;
 954
 955         /*
 956          * 1280x720 is reported to use 'SUBSAMPLING' only,
 957          * but according to the sensor manual it goes through the
 958          * scaler before subsampling.
 959          */
 960         if (mode->dn_mode == SCALING ||
 961            (mode->id == OV5640_MODE_720P_1280_720))
 962                 mipi_div = OV5640_MIPI_DIV_SCLK;
 963         else
 964                 mipi_div = OV5640_MIPI_DIV_PCLK;
 965
 966         ov5640_calc_sys_clk(sensor, rate, &prediv, &mult, &sysdiv);
 967
 968         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL0,
 969                              0x0f, OV5640_PLL_CTRL0_MIPI_MODE_8BIT);
 970
 971         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL1,
 972                              0xff, sysdiv << 4 | mipi_div);
 973         if (ret)
 974                 return ret;
 975
 976         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL2, 0xff, mult);
 977         if (ret)
 978                 return ret;
 979
 980         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL3,
 981                              0x1f, OV5640_PLL_CTRL3_PLL_ROOT_DIV_2 | prediv);
 982         if (ret)
 983                 return ret;
 984
 985         return ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER,
 986                               0x30, OV5640_PLL_SYS_ROOT_DIVIDER_BYPASS);
 987 }
 988
 989 static unsigned long ov5640_calc_pclk(struct ov5640_dev *sensor,
 990                                       unsigned long rate,
 991                                       u8 *pll_prediv, u8 *pll_mult, u8 *sysdiv,
 992                                       u8 *pll_rdiv, u8 *bit_div, u8 *pclk_div)
 993 {
 994         unsigned long _rate = rate * OV5640_PLL_ROOT_DIV * OV5640_BIT_DIV *
 995                                 OV5640_PCLK_ROOT_DIV;
 996
 997         _rate = ov5640_calc_sys_clk(sensor, _rate, pll_prediv, pll_mult,
 998                                     sysdiv);
 999         *pll_rdiv = OV5640_PLL_ROOT_DIV;
1000         *bit_div = OV5640_BIT_DIV;
1001         *pclk_div = OV5640_PCLK_ROOT_DIV;
1002
1003         return _rate / *pll_rdiv / *bit_div / *pclk_div;
1004 }
1005
1006 static int ov5640_set_dvp_pclk(struct ov5640_dev *sensor, unsigned long rate)
1007 {
1008         u8 prediv, mult, sysdiv, pll_rdiv, bit_div, pclk_div;
1009         int ret;
1010
1011         ov5640_calc_pclk(sensor, rate, &prediv, &mult, &sysdiv, &pll_rdiv,
1012                          &bit_div, &pclk_div);
1013
1014         if (bit_div == 2)
1015                 bit_div = 8;
1016
1017         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL0,
1018                              0x0f, bit_div);
1019         if (ret)
1020                 return ret;
1021
1022         /*
1023          * We need to set sysdiv according to the clock, and to clear
1024          * the MIPI divider.
1025          */
1026         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL1,
1027                              0xff, sysdiv << 4);
1028         if (ret)
1029                 return ret;
1030
1031         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL2,
1032                              0xff, mult);
1033         if (ret)
1034                 return ret;
1035
1036         ret = ov5640_mod_reg(sensor, OV5640_REG_SC_PLL_CTRL3,
1037                              0x1f, prediv | ((pll_rdiv - 1) << 4));
1038         if (ret)
1039                 return ret;
1040
1041         return ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, 0x30,
1042                               (ilog2(pclk_div) << 4));
1043 }
1044
1045 /* set JPEG framing sizes */
1046 static int ov5640_set_jpeg_timings(struct ov5640_dev *sensor,
1047                                    const struct ov5640_mode_info *mode)
1048 {
1049         int ret;
1050
1051         /*
1052          * compression mode 3 timing
1053          *
1054          * Data is transmitted with programmable width (VFIFO_HSIZE).
1055          * No padding done. Last line may have less data. Varying
1056          * number of lines per frame, depending on amount of data.
1057          */
1058         ret = ov5640_mod_reg(sensor, OV5640_REG_JPG_MODE_SELECT, 0x7, 0x3);
1059         if (ret < 0)
1060                 return ret;
1061
1062         ret = ov5640_write_reg16(sensor, OV5640_REG_VFIFO_HSIZE, mode->hact);
1063         if (ret < 0)
1064                 return ret;
1065
1066         return ov5640_write_reg16(sensor, OV5640_REG_VFIFO_VSIZE, mode->vact);
1067 }
1068
1069 /* download ov5640 settings to sensor through i2c */
1070 static int ov5640_set_timings(struct ov5640_dev *sensor,
1071                               const struct ov5640_mode_info *mode)
1072 {
1073         int ret;
1074
1075         if (sensor->fmt.code == MEDIA_BUS_FMT_JPEG_1X8) {
1076                 ret = ov5640_set_jpeg_timings(sensor, mode);
1077                 if (ret < 0)
1078                         return ret;
1079         }
1080
1081         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_DVPHO, mode->hact);
1082         if (ret < 0)
1083                 return ret;
1084
1085         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_DVPVO, mode->vact);
1086         if (ret < 0)
1087                 return ret;
1088
1089         ret = ov5640_write_reg16(sensor, OV5640_REG_TIMING_HTS, mode->htot);
1090         if (ret < 0)
1091                 return ret;
1092
1093         return ov5640_write_reg16(sensor, OV5640_REG_TIMING_VTS, mode->vtot);
1094 }
1095
1096 static int ov5640_load_regs(struct ov5640_dev *sensor,
1097                             const struct ov5640_mode_info *mode)
1098 {
1099         const struct reg_value *regs = mode->reg_data;
1100         unsigned int i;
1101         u32 delay_ms;
1102         u16 reg_addr;
1103         u8 mask, val;
1104         int ret = 0;
1105
1106         for (i = 0; i < mode->reg_data_size; ++i, ++regs) {
1107                 delay_ms = regs->delay_ms;
1108                 reg_addr = regs->reg_addr;
1109                 val = regs->val;
1110                 mask = regs->mask;
1111
1112                 if (mask)
1113                         ret = ov5640_mod_reg(sensor, reg_addr, mask, val);
1114                 else
1115                         ret = ov5640_write_reg(sensor, reg_addr, val);
1116                 if (ret)
1117                         break;
1118
1119                 if (delay_ms)
1120                         usleep_range(1000 * delay_ms, 1000 * delay_ms + 100);
1121         }
1122
1123         return ov5640_set_timings(sensor, mode);
1124 }
1125
1126 static int ov5640_set_autoexposure(struct ov5640_dev *sensor, bool on)
1127 {
1128         return ov5640_mod_reg(sensor, OV5640_REG_AEC_PK_MANUAL,
1129                               BIT(0), on ? 0 : BIT(0));
1130 }
1131
1132 /* read exposure, in number of line periods */
1133 static int ov5640_get_exposure(struct ov5640_dev *sensor)
1134 {
1135         int exp, ret;
1136         u8 temp;
1137
1138         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_HI, &temp);
1139         if (ret)
1140                 return ret;
1141         exp = ((int)temp & 0x0f) << 16;
1142         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_MED, &temp);
1143         if (ret)
1144                 return ret;
1145         exp |= ((int)temp << 8);
1146         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_PK_EXPOSURE_LO, &temp);
1147         if (ret)
1148                 return ret;
1149         exp |= (int)temp;
1150
1151         return exp >> 4;
1152 }
1153
1154 /* write exposure, given number of line periods */
1155 static int ov5640_set_exposure(struct ov5640_dev *sensor, u32 exposure)
1156 {
1157         int ret;
1158
1159         exposure <<= 4;
1160
1161         ret = ov5640_write_reg(sensor,
1162                                OV5640_REG_AEC_PK_EXPOSURE_LO,
1163                                exposure & 0xff);
1164         if (ret)
1165                 return ret;
1166         ret = ov5640_write_reg(sensor,
1167                                OV5640_REG_AEC_PK_EXPOSURE_MED,
1168                                (exposure >> 8) & 0xff);
1169         if (ret)
1170                 return ret;
1171         return ov5640_write_reg(sensor,
1172                                 OV5640_REG_AEC_PK_EXPOSURE_HI,
1173                                 (exposure >> 16) & 0x0f);
1174 }
1175
1176 static int ov5640_get_gain(struct ov5640_dev *sensor)
1177 {
1178         u16 gain;
1179         int ret;
1180
1181         ret = ov5640_read_reg16(sensor, OV5640_REG_AEC_PK_REAL_GAIN, &gain);
1182         if (ret)
1183                 return ret;
1184
1185         return gain & 0x3ff;
1186 }
1187
1188 static int ov5640_set_gain(struct ov5640_dev *sensor, int gain)
1189 {
1190         return ov5640_write_reg16(sensor, OV5640_REG_AEC_PK_REAL_GAIN,
1191                                   (u16)gain & 0x3ff);
1192 }
1193
1194 static int ov5640_set_autogain(struct ov5640_dev *sensor, bool on)
1195 {
1196         return ov5640_mod_reg(sensor, OV5640_REG_AEC_PK_MANUAL,
1197                               BIT(1), on ? 0 : BIT(1));
1198 }
1199
1200 static int ov5640_set_stream_dvp(struct ov5640_dev *sensor, bool on)
1201 {
1202         int ret;
1203         unsigned int flags = sensor->ep.bus.parallel.flags;
1204         u8 pclk_pol = 0;
1205         u8 hsync_pol = 0;
1206         u8 vsync_pol = 0;
1207
1208         /*
1209          * Note about parallel port configuration.
1210          *
1211          * When configured in parallel mode, the OV5640 will
1212          * output 10 bits data on DVP data lines [9:0].
1213          * If only 8 bits data are wanted, the 8 bits data lines
1214          * of the camera interface must be physically connected
1215          * on the DVP data lines [9:2].
1216          *
1217          * Control lines polarity can be configured through
1218          * devicetree endpoint control lines properties.
1219          * If no endpoint control lines properties are set,
1220          * polarity will be as below:
1221          * - VSYNC:     active high
1222          * - HREF:      active low
1223          * - PCLK:      active low
1224          */
1225
1226         if (on) {
1227                 /*
1228                  * configure parallel port control lines polarity
1229                  *
1230                  * POLARITY CTRL0
1231                  * - [5]:       PCLK polarity (0: active low, 1: active high)
1232                  * - [1]:       HREF polarity (0: active low, 1: active high)
1233                  * - [0]:       VSYNC polarity (mismatch here between
1234                  *              datasheet and hardware, 0 is active high
1235                  *              and 1 is active low...)
1236                  */
1237                 if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
1238                         pclk_pol = 1;
1239                 if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
1240                         hsync_pol = 1;
1241                 if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
1242                         vsync_pol = 1;
1243
1244                 ret = ov5640_write_reg(sensor,
1245                                        OV5640_REG_POLARITY_CTRL00,
1246                                        (pclk_pol << 5) |
1247                                        (hsync_pol << 1) |
1248                                        vsync_pol);
1249
1250                 if (ret)
1251                         return ret;
1252         }
1253
1254         /*
1255          * powerdown MIPI TX/RX PHY & disable MIPI
1256          *
1257          * MIPI CONTROL 00
1258          * 4:    PWDN PHY TX
1259          * 3:    PWDN PHY RX
1260          * 2:    MIPI enable
1261          */
1262         ret = ov5640_write_reg(sensor,
1263                                OV5640_REG_IO_MIPI_CTRL00, on ? 0x18 : 0);
1264         if (ret)
1265                 return ret;
1266
1267         /*
1268          * enable VSYNC/HREF/PCLK DVP control lines
1269          * & D[9:6] DVP data lines
1270          *
1271          * PAD OUTPUT ENABLE 01
1272          * - 6:         VSYNC output enable
1273          * - 5:         HREF output enable
1274          * - 4:         PCLK output enable
1275          * - [3:0]:     D[9:6] output enable
1276          */
1277         ret = ov5640_write_reg(sensor,
1278                                OV5640_REG_PAD_OUTPUT_ENABLE01,
1279                                on ? 0x7f : 0);
1280         if (ret)
1281                 return ret;
1282
1283         /*
1284          * enable D[5:0] DVP data lines
1285          *
1286          * PAD OUTPUT ENABLE 02
1287          * - [7:2]:     D[5:0] output enable
1288          */
1289         return ov5640_write_reg(sensor,
1290                                 OV5640_REG_PAD_OUTPUT_ENABLE02,
1291                                 on ? 0xfc : 0);
1292 }
1293
1294 static int ov5640_set_stream_mipi(struct ov5640_dev *sensor, bool on)
1295 {
1296         int ret;
1297
1298         /*
1299          * Enable/disable the MIPI interface
1300          *
1301          * 0x300e = on ? 0x45 : 0x40
1302          *
1303          * FIXME: the sensor manual (version 2.03) reports
1304          * [7:5] = 000  : 1 data lane mode
1305          * [7:5] = 001  : 2 data lanes mode
1306          * But this settings do not work, while the following ones
1307          * have been validated for 2 data lanes mode.
1308          *
1309          * [7:5] = 010  : 2 data lanes mode
1310          * [4] = 0      : Power up MIPI HS Tx
1311          * [3] = 0      : Power up MIPI LS Rx
1312          * [2] = 1/0    : MIPI interface enable/disable
1313          * [1:0] = 01/00: FIXME: 'debug'
1314          */
1315         ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00,
1316                                on ? 0x45 : 0x40);
1317         if (ret)
1318                 return ret;
1319
1320         return ov5640_write_reg(sensor, OV5640_REG_FRAME_CTRL01,
1321                                 on ? 0x00 : 0x0f);
1322 }
1323
1324 static int ov5640_get_sysclk(struct ov5640_dev *sensor)
1325 {
1326          /* calculate sysclk */
1327         u32 xvclk = sensor->xclk_freq / 10000;
1328         u32 multiplier, prediv, VCO, sysdiv, pll_rdiv;
1329         u32 sclk_rdiv_map[] = {1, 2, 4, 8};
1330         u32 bit_div2x = 1, sclk_rdiv, sysclk;
1331         u8 temp1, temp2;
1332         int ret;
1333
1334         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL0, &temp1);
1335         if (ret)
1336                 return ret;
1337         temp2 = temp1 & 0x0f;
1338         if (temp2 == 8 || temp2 == 10)
1339                 bit_div2x = temp2 / 2;
1340
1341         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL1, &temp1);
1342         if (ret)
1343                 return ret;
1344         sysdiv = temp1 >> 4;
1345         if (sysdiv == 0)
1346                 sysdiv = 16;
1347
1348         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL2, &temp1);
1349         if (ret)
1350                 return ret;
1351         multiplier = temp1;
1352
1353         ret = ov5640_read_reg(sensor, OV5640_REG_SC_PLL_CTRL3, &temp1);
1354         if (ret)
1355                 return ret;
1356         prediv = temp1 & 0x0f;
1357         pll_rdiv = ((temp1 >> 4) & 0x01) + 1;
1358
1359         ret = ov5640_read_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, &temp1);
1360         if (ret)
1361                 return ret;
1362         temp2 = temp1 & 0x03;
1363         sclk_rdiv = sclk_rdiv_map[temp2];
1364
1365         if (!prediv || !sysdiv || !pll_rdiv || !bit_div2x)
1366                 return -EINVAL;
1367
1368         VCO = xvclk * multiplier / prediv;
1369
1370         sysclk = VCO / sysdiv / pll_rdiv * 2 / bit_div2x / sclk_rdiv;
1371
1372         return sysclk;
1373 }
1374
1375 static int ov5640_set_night_mode(struct ov5640_dev *sensor)
1376 {
1377          /* read HTS from register settings */
1378         u8 mode;
1379         int ret;
1380
1381         ret = ov5640_read_reg(sensor, OV5640_REG_AEC_CTRL00, &mode);
1382         if (ret)
1383                 return ret;
1384         mode &= 0xfb;
1385         return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL00, mode);
1386 }
1387
1388 static int ov5640_get_hts(struct ov5640_dev *sensor)
1389 {
1390         /* read HTS from register settings */
1391         u16 hts;
1392         int ret;
1393
1394         ret = ov5640_read_reg16(sensor, OV5640_REG_TIMING_HTS, &hts);
1395         if (ret)
1396                 return ret;
1397         return hts;
1398 }
1399
1400 static int ov5640_get_vts(struct ov5640_dev *sensor)
1401 {
1402         u16 vts;
1403         int ret;
1404
1405         ret = ov5640_read_reg16(sensor, OV5640_REG_TIMING_VTS, &vts);
1406         if (ret)
1407                 return ret;
1408         return vts;
1409 }
1410
1411 static int ov5640_set_vts(struct ov5640_dev *sensor, int vts)
1412 {
1413         return ov5640_write_reg16(sensor, OV5640_REG_TIMING_VTS, vts);
1414 }
1415
1416 static int ov5640_get_light_freq(struct ov5640_dev *sensor)
1417 {
1418         /* get banding filter value */
1419         int ret, light_freq = 0;
1420         u8 temp, temp1;
1421
1422         ret = ov5640_read_reg(sensor, OV5640_REG_HZ5060_CTRL01, &temp);
1423         if (ret)
1424                 return ret;
1425
1426         if (temp & 0x80) {
1427                 /* manual */
1428                 ret = ov5640_read_reg(sensor, OV5640_REG_HZ5060_CTRL00,
1429                                       &temp1);
1430                 if (ret)
1431                         return ret;
1432                 if (temp1 & 0x04) {
1433                         /* 50Hz */
1434                         light_freq = 50;
1435                 } else {
1436                         /* 60Hz */
1437                         light_freq = 60;
1438                 }
1439         } else {
1440                 /* auto */
1441                 ret = ov5640_read_reg(sensor, OV5640_REG_SIGMADELTA_CTRL0C,
1442                                       &temp1);
1443                 if (ret)
1444                         return ret;
1445
1446                 if (temp1 & 0x01) {
1447                         /* 50Hz */
1448                         light_freq = 50;
1449                 } else {
1450                         /* 60Hz */
1451                 }
1452         }
1453
1454         return light_freq;
1455 }
1456
1457 static int ov5640_set_bandingfilter(struct ov5640_dev *sensor)
1458 {
1459         u32 band_step60, max_band60, band_step50, max_band50, prev_vts;
1460         int ret;
1461
1462         /* read preview PCLK */
1463         ret = ov5640_get_sysclk(sensor);
1464         if (ret < 0)
1465                 return ret;
1466         if (ret == 0)
1467                 return -EINVAL;
1468         sensor->prev_sysclk = ret;
1469         /* read preview HTS */
1470         ret = ov5640_get_hts(sensor);
1471         if (ret < 0)
1472                 return ret;
1473         if (ret == 0)
1474                 return -EINVAL;
1475         sensor->prev_hts = ret;
1476
1477         /* read preview VTS */
1478         ret = ov5640_get_vts(sensor);
1479         if (ret < 0)
1480                 return ret;
1481         prev_vts = ret;
1482
1483         /* calculate banding filter */
1484         /* 60Hz */
1485         band_step60 = sensor->prev_sysclk * 100 / sensor->prev_hts * 100 / 120;
1486         ret = ov5640_write_reg16(sensor, OV5640_REG_AEC_B60_STEP, band_step60);
1487         if (ret)
1488                 return ret;
1489         if (!band_step60)
1490                 return -EINVAL;
1491         max_band60 = (int)((prev_vts - 4) / band_step60);
1492         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0D, max_band60);
1493         if (ret)
1494                 return ret;
1495
1496         /* 50Hz */
1497         band_step50 = sensor->prev_sysclk * 100 / sensor->prev_hts;
1498         ret = ov5640_write_reg16(sensor, OV5640_REG_AEC_B50_STEP, band_step50);
1499         if (ret)
1500                 return ret;
1501         if (!band_step50)
1502                 return -EINVAL;
1503         max_band50 = (int)((prev_vts - 4) / band_step50);
1504         return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0E, max_band50);
1505 }
1506
1507 static int ov5640_set_ae_target(struct ov5640_dev *sensor, int target)
1508 {
1509         /* stable in high */
1510         u32 fast_high, fast_low;
1511         int ret;
1512
1513         sensor->ae_low = target * 23 / 25;      /* 0.92 */
1514         sensor->ae_high = target * 27 / 25;     /* 1.08 */
1515
1516         fast_high = sensor->ae_high << 1;
1517         if (fast_high > 255)
1518                 fast_high = 255;
1519
1520         fast_low = sensor->ae_low >> 1;
1521
1522         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL0F, sensor->ae_high);
1523         if (ret)
1524                 return ret;
1525         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL10, sensor->ae_low);
1526         if (ret)
1527                 return ret;
1528         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1B, sensor->ae_high);
1529         if (ret)
1530                 return ret;
1531         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1E, sensor->ae_low);
1532         if (ret)
1533                 return ret;
1534         ret = ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL11, fast_high);
1535         if (ret)
1536                 return ret;
1537         return ov5640_write_reg(sensor, OV5640_REG_AEC_CTRL1F, fast_low);
1538 }
1539
1540 static int ov5640_get_binning(struct ov5640_dev *sensor)
1541 {
1542         u8 temp;
1543         int ret;
1544
1545         ret = ov5640_read_reg(sensor, OV5640_REG_TIMING_TC_REG21, &temp);
1546         if (ret)
1547                 return ret;
1548
1549         return temp & BIT(0);
1550 }
1551
1552 static int ov5640_set_binning(struct ov5640_dev *sensor, bool enable)
1553 {
1554         int ret;
1555
1556         /*
1557          * TIMING TC REG21:
1558          * - [0]:       Horizontal binning enable
1559          */
1560         ret = ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
1561                              BIT(0), enable ? BIT(0) : 0);
1562         if (ret)
1563                 return ret;
1564         /*
1565          * TIMING TC REG20:
1566          * - [0]:       Undocumented, but hardcoded init sequences
1567          *              are always setting REG21/REG20 bit 0 to same value...
1568          */
1569         return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG20,
1570                               BIT(0), enable ? BIT(0) : 0);
1571 }
1572
1573 static int ov5640_set_virtual_channel(struct ov5640_dev *sensor)
1574 {
1575         struct i2c_client *client = sensor->i2c_client;
1576         u8 temp, channel = virtual_channel;
1577         int ret;
1578
1579         if (channel > 3) {
1580                 dev_err(&client->dev,
1581                         "%s: wrong virtual_channel parameter, expected (0..3), got %d\n",
1582                         __func__, channel);
1583                 return -EINVAL;
1584         }
1585
1586         ret = ov5640_read_reg(sensor, OV5640_REG_DEBUG_MODE, &temp);
1587         if (ret)
1588                 return ret;
1589         temp &= ~(3 << 6);
1590         temp |= (channel << 6);
1591         return ov5640_write_reg(sensor, OV5640_REG_DEBUG_MODE, temp);
1592 }
1593
1594 static const struct ov5640_mode_info *
1595 ov5640_find_mode(struct ov5640_dev *sensor, enum ov5640_frame_rate fr,
1596                  int width, int height, bool nearest)
1597 {
1598         const struct ov5640_mode_info *mode;
1599
1600         mode = v4l2_find_nearest_size(ov5640_mode_data,
1601                                       ARRAY_SIZE(ov5640_mode_data),
1602                                       hact, vact,
1603                                       width, height);
1604
1605         if (!mode ||
1606             (!nearest && (mode->hact != width || mode->vact != height)))
1607                 return NULL;
1608
1609         /* Only 640x480 can operate at 60fps (for now) */
1610         if (fr == OV5640_60_FPS &&
1611             !(mode->hact == 640 && mode->vact == 480))
1612                 return NULL;
1613
1614         /* 2592x1944 only works at 15fps max */
1615         if ((mode->hact == 2592 && mode->vact == 1944) &&
1616             fr > OV5640_15_FPS)
1617                 return NULL;
1618
1619         return mode;
1620 }
1621
1622 static u64 ov5640_calc_pixel_rate(struct ov5640_dev *sensor)
1623 {
1624         u64 rate;
1625
1626         rate = sensor->current_mode->vtot * sensor->current_mode->htot;
1627         rate *= ov5640_framerates[sensor->current_fr];
1628
1629         return rate;
1630 }
1631
1632 /*
1633  * sensor changes between scaling and subsampling, go through
1634  * exposure calculation
1635  */
1636 static int ov5640_set_mode_exposure_calc(struct ov5640_dev *sensor,
1637                                          const struct ov5640_mode_info *mode)
1638 {
1639         u32 prev_shutter, prev_gain16;
1640         u32 cap_shutter, cap_gain16;
1641         u32 cap_sysclk, cap_hts, cap_vts;
1642         u32 light_freq, cap_bandfilt, cap_maxband;
1643         u32 cap_gain16_shutter;
1644         u8 average;
1645         int ret;
1646
1647         if (!mode->reg_data)
1648                 return -EINVAL;
1649
1650         /* read preview shutter */
1651         ret = ov5640_get_exposure(sensor);
1652         if (ret < 0)
1653                 return ret;
1654         prev_shutter = ret;
1655         ret = ov5640_get_binning(sensor);
1656         if (ret < 0)
1657                 return ret;
1658         if (ret && mode->id != OV5640_MODE_720P_1280_720 &&
1659             mode->id != OV5640_MODE_1080P_1920_1080)
1660                 prev_shutter *= 2;
1661
1662         /* read preview gain */
1663         ret = ov5640_get_gain(sensor);
1664         if (ret < 0)
1665                 return ret;
1666         prev_gain16 = ret;
1667
1668         /* get average */
1669         ret = ov5640_read_reg(sensor, OV5640_REG_AVG_READOUT, &average);
1670         if (ret)
1671                 return ret;
1672
1673         /* turn off night mode for capture */
1674         ret = ov5640_set_night_mode(sensor);
1675         if (ret < 0)
1676                 return ret;
1677
1678         /* Write capture setting */
1679         ret = ov5640_load_regs(sensor, mode);
1680         if (ret < 0)
1681                 return ret;
1682
1683         /* read capture VTS */
1684         ret = ov5640_get_vts(sensor);
1685         if (ret < 0)
1686                 return ret;
1687         cap_vts = ret;
1688         ret = ov5640_get_hts(sensor);
1689         if (ret < 0)
1690                 return ret;
1691         if (ret == 0)
1692                 return -EINVAL;
1693         cap_hts = ret;
1694
1695         ret = ov5640_get_sysclk(sensor);
1696         if (ret < 0)
1697                 return ret;
1698         if (ret == 0)
1699                 return -EINVAL;
1700         cap_sysclk = ret;
1701
1702         /* calculate capture banding filter */
1703         ret = ov5640_get_light_freq(sensor);
1704         if (ret < 0)
1705                 return ret;
1706         light_freq = ret;
1707
1708         if (light_freq == 60) {
1709                 /* 60Hz */
1710                 cap_bandfilt = cap_sysclk * 100 / cap_hts * 100 / 120;
1711         } else {
1712                 /* 50Hz */
1713                 cap_bandfilt = cap_sysclk * 100 / cap_hts;
1714         }
1715
1716         if (!sensor->prev_sysclk) {
1717                 ret = ov5640_get_sysclk(sensor);
1718                 if (ret < 0)
1719                         return ret;
1720                 if (ret == 0)
1721                         return -EINVAL;
1722                 sensor->prev_sysclk = ret;
1723         }
1724
1725         if (!cap_bandfilt)
1726                 return -EINVAL;
1727
1728         cap_maxband = (int)((cap_vts - 4) / cap_bandfilt);
1729
1730         /* calculate capture shutter/gain16 */
1731         if (average > sensor->ae_low && average < sensor->ae_high) {
1732                 /* in stable range */
1733                 cap_gain16_shutter =
1734                         prev_gain16 * prev_shutter *
1735                         cap_sysclk / sensor->prev_sysclk *
1736                         sensor->prev_hts / cap_hts *
1737                         sensor->ae_target / average;
1738         } else {
1739                 cap_gain16_shutter =
1740                         prev_gain16 * prev_shutter *
1741                         cap_sysclk / sensor->prev_sysclk *
1742                         sensor->prev_hts / cap_hts;
1743         }
1744
1745         /* gain to shutter */
1746         if (cap_gain16_shutter < (cap_bandfilt * 16)) {
1747                 /* shutter < 1/100 */
1748                 cap_shutter = cap_gain16_shutter / 16;
1749                 if (cap_shutter < 1)
1750                         cap_shutter = 1;
1751
1752                 cap_gain16 = cap_gain16_shutter / cap_shutter;
1753                 if (cap_gain16 < 16)
1754                         cap_gain16 = 16;
1755         } else {
1756                 if (cap_gain16_shutter > (cap_bandfilt * cap_maxband * 16)) {
1757                         /* exposure reach max */
1758                         cap_shutter = cap_bandfilt * cap_maxband;
1759                         if (!cap_shutter)
1760                                 return -EINVAL;
1761
1762                         cap_gain16 = cap_gain16_shutter / cap_shutter;
1763                 } else {
1764                         /* 1/100 < (cap_shutter = n/100) =< max */
1765                         cap_shutter =
1766                                 ((int)(cap_gain16_shutter / 16 / cap_bandfilt))
1767                                 * cap_bandfilt;
1768                         if (!cap_shutter)
1769                                 return -EINVAL;
1770
1771                         cap_gain16 = cap_gain16_shutter / cap_shutter;
1772                 }
1773         }
1774
1775         /* set capture gain */
1776         ret = ov5640_set_gain(sensor, cap_gain16);
1777         if (ret)
1778                 return ret;
1779
1780         /* write capture shutter */
1781         if (cap_shutter > (cap_vts - 4)) {
1782                 cap_vts = cap_shutter + 4;
1783                 ret = ov5640_set_vts(sensor, cap_vts);
1784                 if (ret < 0)
1785                         return ret;
1786         }
1787
1788         /* set exposure */
1789         return ov5640_set_exposure(sensor, cap_shutter);
1790 }
1791
1792 /*
1793  * if sensor changes inside scaling or subsampling
1794  * change mode directly
1795  */
1796 static int ov5640_set_mode_direct(struct ov5640_dev *sensor,
1797                                   const struct ov5640_mode_info *mode)
1798 {
1799         if (!mode->reg_data)
1800                 return -EINVAL;
1801
1802         /* Write capture setting */
1803         return ov5640_load_regs(sensor, mode);
1804 }
1805
1806 static int ov5640_set_mode(struct ov5640_dev *sensor)
1807 {
1808         const struct ov5640_mode_info *mode = sensor->current_mode;
1809         const struct ov5640_mode_info *orig_mode = sensor->last_mode;
1810         enum ov5640_downsize_mode dn_mode, orig_dn_mode;
1811         bool auto_gain = sensor->ctrls.auto_gain->val == 1;
1812         bool auto_exp =  sensor->ctrls.auto_exp->val == V4L2_EXPOSURE_AUTO;
1813         unsigned long rate;
1814         int ret;
1815
1816         dn_mode = mode->dn_mode;
1817         orig_dn_mode = orig_mode->dn_mode;
1818
1819         /* auto gain and exposure must be turned off when changing modes */
1820         if (auto_gain) {
1821                 ret = ov5640_set_autogain(sensor, false);
1822                 if (ret)
1823                         return ret;
1824         }
1825
1826         if (auto_exp) {
1827                 ret = ov5640_set_autoexposure(sensor, false);
1828                 if (ret)
1829                         goto restore_auto_gain;
1830         }
1831
1832         /*
1833          * All the formats we support have 16 bits per pixel, seems to require
1834          * the same rate than YUV, so we can just use 16 bpp all the time.
1835          */
1836         rate = ov5640_calc_pixel_rate(sensor) * 16;
1837         if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY) {
1838                 rate = rate / sensor->ep.bus.mipi_csi2.num_data_lanes;
1839                 ret = ov5640_set_mipi_pclk(sensor, rate);
1840         } else {
1841                 rate = rate / sensor->ep.bus.parallel.bus_width;
1842                 ret = ov5640_set_dvp_pclk(sensor, rate);
1843         }
1844
1845         if (ret < 0)
1846                 return 0;
1847
1848         if ((dn_mode == SUBSAMPLING && orig_dn_mode == SCALING) ||
1849             (dn_mode == SCALING && orig_dn_mode == SUBSAMPLING)) {
1850                 /*
1851                  * change between subsampling and scaling
1852                  * go through exposure calculation
1853                  */
1854                 ret = ov5640_set_mode_exposure_calc(sensor, mode);
1855         } else {
1856                 /*
1857                  * change inside subsampling or scaling
1858                  * download firmware directly
1859                  */
1860                 ret = ov5640_set_mode_direct(sensor, mode);
1861         }
1862         if (ret < 0)
1863                 goto restore_auto_exp_gain;
1864
1865         /* restore auto gain and exposure */
1866         if (auto_gain)
1867                 ov5640_set_autogain(sensor, true);
1868         if (auto_exp)
1869                 ov5640_set_autoexposure(sensor, true);
1870
1871         ret = ov5640_set_binning(sensor, dn_mode != SCALING);
1872         if (ret < 0)
1873                 return ret;
1874         ret = ov5640_set_ae_target(sensor, sensor->ae_target);
1875         if (ret < 0)
1876                 return ret;
1877         ret = ov5640_get_light_freq(sensor);
1878         if (ret < 0)
1879                 return ret;
1880         ret = ov5640_set_bandingfilter(sensor);
1881         if (ret < 0)
1882                 return ret;
1883         ret = ov5640_set_virtual_channel(sensor);
1884         if (ret < 0)
1885                 return ret;
1886
1887         sensor->pending_mode_change = false;
1888         sensor->last_mode = mode;
1889
1890         return 0;
1891
1892 restore_auto_exp_gain:
1893         if (auto_exp)
1894                 ov5640_set_autoexposure(sensor, true);
1895 restore_auto_gain:
1896         if (auto_gain)
1897                 ov5640_set_autogain(sensor, true);
1898
1899         return ret;
1900 }
1901
1902 static int ov5640_set_framefmt(struct ov5640_dev *sensor,
1903                                struct v4l2_mbus_framefmt *format);
1904
1905 /* restore the last set video mode after chip power-on */
1906 static int ov5640_restore_mode(struct ov5640_dev *sensor)
1907 {
1908         int ret;
1909
1910         /* first load the initial register values */
1911         ret = ov5640_load_regs(sensor, &ov5640_mode_init_data);
1912         if (ret < 0)
1913                 return ret;
1914         sensor->last_mode = &ov5640_mode_init_data;
1915
1916         ret = ov5640_mod_reg(sensor, OV5640_REG_SYS_ROOT_DIVIDER, 0x3f,
1917                              (ilog2(OV5640_SCLK2X_ROOT_DIV) << 2) |
1918                              ilog2(OV5640_SCLK_ROOT_DIV));
1919         if (ret)
1920                 return ret;
1921
1922         /* now restore the last capture mode */
1923         ret = ov5640_set_mode(sensor);
1924         if (ret < 0)
1925                 return ret;
1926
1927         return ov5640_set_framefmt(sensor, &sensor->fmt);
1928 }
1929
1930 static void ov5640_power(struct ov5640_dev *sensor, bool enable)
1931 {
1932         gpiod_set_value_cansleep(sensor->pwdn_gpio, enable ? 0 : 1);
1933 }
1934
1935 static void ov5640_reset(struct ov5640_dev *sensor)
1936 {
1937         if (!sensor->reset_gpio)
1938                 return;
1939
1940         gpiod_set_value_cansleep(sensor->reset_gpio, 0);
1941
1942         /* camera power cycle */
1943         ov5640_power(sensor, false);
1944         usleep_range(5000, 10000);
1945         ov5640_power(sensor, true);
1946         usleep_range(5000, 10000);
1947
1948         gpiod_set_value_cansleep(sensor->reset_gpio, 1);
1949         usleep_range(1000, 2000);
1950
1951         gpiod_set_value_cansleep(sensor->reset_gpio, 0);
1952         usleep_range(20000, 25000);
1953 }
1954
1955 static int ov5640_set_power_on(struct ov5640_dev *sensor)
1956 {
1957         struct i2c_client *client = sensor->i2c_client;
1958         int ret;
1959
1960         ret = clk_prepare_enable(sensor->xclk);
1961         if (ret) {
1962                 dev_err(&client->dev, "%s: failed to enable clock\n",
1963                         __func__);
1964                 return ret;
1965         }
1966
1967         ret = regulator_bulk_enable(OV5640_NUM_SUPPLIES,
1968                                     sensor->supplies);
1969         if (ret) {
1970                 dev_err(&client->dev, "%s: failed to enable regulators\n",
1971                         __func__);
1972                 goto xclk_off;
1973         }
1974
1975         ov5640_reset(sensor);
1976         ov5640_power(sensor, true);
1977
1978         ret = ov5640_init_slave_id(sensor);
1979         if (ret)
1980                 goto power_off;
1981
1982         return 0;
1983
1984 power_off:
1985         ov5640_power(sensor, false);
1986         regulator_bulk_disable(OV5640_NUM_SUPPLIES, sensor->supplies);
1987 xclk_off:
1988         clk_disable_unprepare(sensor->xclk);
1989         return ret;
1990 }
1991
1992 static void ov5640_set_power_off(struct ov5640_dev *sensor)
1993 {
1994         ov5640_power(sensor, false);
1995         regulator_bulk_disable(OV5640_NUM_SUPPLIES, sensor->supplies);
1996         clk_disable_unprepare(sensor->xclk);
1997 }
1998
1999 static int ov5640_set_power(struct ov5640_dev *sensor, bool on)
2000 {
2001         int ret = 0;
2002
2003         if (on) {
2004                 ret = ov5640_set_power_on(sensor);
2005                 if (ret)
2006                         return ret;
2007
2008                 ret = ov5640_restore_mode(sensor);
2009                 if (ret)
2010                         goto power_off;
2011
2012                 /* We're done here for DVP bus, while CSI-2 needs setup. */
2013                 if (sensor->ep.bus_type != V4L2_MBUS_CSI2_DPHY)
2014                         return 0;
2015
2016                 /*
2017                  * Power up MIPI HS Tx and LS Rx; 2 data lanes mode
2018                  *
2019                  * 0x300e = 0x40
2020                  * [7:5] = 010  : 2 data lanes mode (see FIXME note in
2021                  *                "ov5640_set_stream_mipi()")
2022                  * [4] = 0      : Power up MIPI HS Tx
2023                  * [3] = 0      : Power up MIPI LS Rx
2024                  * [2] = 0      : MIPI interface disabled
2025                  */
2026                 ret = ov5640_write_reg(sensor,
2027                                        OV5640_REG_IO_MIPI_CTRL00, 0x40);
2028                 if (ret)
2029                         goto power_off;
2030
2031                 /*
2032                  * Gate clock and set LP11 in 'no packets mode' (idle)
2033                  *
2034                  * 0x4800 = 0x24
2035                  * [5] = 1      : Gate clock when 'no packets'
2036                  * [2] = 1      : MIPI bus in LP11 when 'no packets'
2037                  */
2038                 ret = ov5640_write_reg(sensor,
2039                                        OV5640_REG_MIPI_CTRL00, 0x24);
2040                 if (ret)
2041                         goto power_off;
2042
2043                 /*
2044                  * Set data lanes and clock in LP11 when 'sleeping'
2045                  *
2046                  * 0x3019 = 0x70
2047                  * [6] = 1      : MIPI data lane 2 in LP11 when 'sleeping'
2048                  * [5] = 1      : MIPI data lane 1 in LP11 when 'sleeping'
2049                  * [4] = 1      : MIPI clock lane in LP11 when 'sleeping'
2050                  */
2051                 ret = ov5640_write_reg(sensor,
2052                                        OV5640_REG_PAD_OUTPUT00, 0x70);
2053                 if (ret)
2054                         goto power_off;
2055
2056                 /* Give lanes some time to coax into LP11 state. */
2057                 usleep_range(500, 1000);
2058
2059         } else {
2060                 if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY) {
2061                         /* Reset MIPI bus settings to their default values. */
2062                         ov5640_write_reg(sensor,
2063                                          OV5640_REG_IO_MIPI_CTRL00, 0x58);
2064                         ov5640_write_reg(sensor,
2065                                          OV5640_REG_MIPI_CTRL00, 0x04);
2066                         ov5640_write_reg(sensor,
2067                                          OV5640_REG_PAD_OUTPUT00, 0x00);
2068                 }
2069
2070                 ov5640_set_power_off(sensor);
2071         }
2072
2073         return 0;
2074
2075 power_off:
2076         ov5640_set_power_off(sensor);
2077         return ret;
2078 }
2079
2080 /* --------------- Subdev Operations --------------- */
2081
2082 static int ov5640_s_power(struct v4l2_subdev *sd, int on)
2083 {
2084         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2085         int ret = 0;
2086
2087         mutex_lock(&sensor->lock);
2088
2089         /*
2090          * If the power count is modified from 0 to != 0 or from != 0 to 0,
2091          * update the power state.
2092          */
2093         if (sensor->power_count == !on) {
2094                 ret = ov5640_set_power(sensor, !!on);
2095                 if (ret)
2096                         goto out;
2097         }
2098
2099         /* Update the power count. */
2100         sensor->power_count += on ? 1 : -1;
2101         WARN_ON(sensor->power_count < 0);
2102 out:
2103         mutex_unlock(&sensor->lock);
2104
2105         if (on && !ret && sensor->power_count == 1) {
2106                 /* restore controls */
2107                 ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
2108         }
2109
2110         return ret;
2111 }
2112
2113 static int ov5640_try_frame_interval(struct ov5640_dev *sensor,
2114                                      struct v4l2_fract *fi,
2115                                      u32 width, u32 height)
2116 {
2117         const struct ov5640_mode_info *mode;
2118         enum ov5640_frame_rate rate = OV5640_15_FPS;
2119         int minfps, maxfps, best_fps, fps;
2120         int i;
2121
2122         minfps = ov5640_framerates[OV5640_15_FPS];
2123         maxfps = ov5640_framerates[OV5640_60_FPS];
2124
2125         if (fi->numerator == 0) {
2126                 fi->denominator = maxfps;
2127                 fi->numerator = 1;
2128                 rate = OV5640_60_FPS;
2129                 goto find_mode;
2130         }
2131
2132         fps = clamp_val(DIV_ROUND_CLOSEST(fi->denominator, fi->numerator),
2133                         minfps, maxfps);
2134
2135         best_fps = minfps;
2136         for (i = 0; i < ARRAY_SIZE(ov5640_framerates); i++) {
2137                 int curr_fps = ov5640_framerates[i];
2138
2139                 if (abs(curr_fps - fps) < abs(best_fps - fps)) {
2140                         best_fps = curr_fps;
2141                         rate = i;
2142                 }
2143         }
2144
2145         fi->numerator = 1;
2146         fi->denominator = best_fps;
2147
2148 find_mode:
2149         mode = ov5640_find_mode(sensor, rate, width, height, false);
2150         return mode ? rate : -EINVAL;
2151 }
2152
2153 static int ov5640_get_fmt(struct v4l2_subdev *sd,
2154                           struct v4l2_subdev_pad_config *cfg,
2155                           struct v4l2_subdev_format *format)
2156 {
2157         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2158         struct v4l2_mbus_framefmt *fmt;
2159
2160         if (format->pad != 0)
2161                 return -EINVAL;
2162
2163         mutex_lock(&sensor->lock);
2164
2165         if (format->which == V4L2_SUBDEV_FORMAT_TRY)
2166                 fmt = v4l2_subdev_get_try_format(&sensor->sd, cfg,
2167                                                  format->pad);
2168         else
2169                 fmt = &sensor->fmt;
2170
2171         format->format = *fmt;
2172
2173         mutex_unlock(&sensor->lock);
2174
2175         return 0;
2176 }
2177
2178 static int ov5640_try_fmt_internal(struct v4l2_subdev *sd,
2179                                    struct v4l2_mbus_framefmt *fmt,
2180                                    enum ov5640_frame_rate fr,
2181                                    const struct ov5640_mode_info **new_mode)
2182 {
2183         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2184         const struct ov5640_mode_info *mode;
2185         int i;
2186
2187         mode = ov5640_find_mode(sensor, fr, fmt->width, fmt->height, true);
2188         if (!mode)
2189                 return -EINVAL;
2190         fmt->width = mode->hact;
2191         fmt->height = mode->vact;
2192
2193         if (new_mode)
2194                 *new_mode = mode;
2195
2196         for (i = 0; i < ARRAY_SIZE(ov5640_formats); i++)
2197                 if (ov5640_formats[i].code == fmt->code)
2198                         break;
2199         if (i >= ARRAY_SIZE(ov5640_formats))
2200                 i = 0;
2201
2202         fmt->code = ov5640_formats[i].code;
2203         fmt->colorspace = ov5640_formats[i].colorspace;
2204         fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
2205         fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
2206         fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
2207
2208         return 0;
2209 }
2210
2211 static int ov5640_set_fmt(struct v4l2_subdev *sd,
2212                           struct v4l2_subdev_pad_config *cfg,
2213                           struct v4l2_subdev_format *format)
2214 {
2215         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2216         const struct ov5640_mode_info *new_mode;
2217         struct v4l2_mbus_framefmt *mbus_fmt = &format->format;
2218         struct v4l2_mbus_framefmt *fmt;
2219         int ret;
2220
2221         if (format->pad != 0)
2222                 return -EINVAL;
2223
2224         mutex_lock(&sensor->lock);
2225
2226         if (sensor->streaming) {
2227                 ret = -EBUSY;
2228                 goto out;
2229         }
2230
2231         ret = ov5640_try_fmt_internal(sd, mbus_fmt,
2232                                       sensor->current_fr, &new_mode);
2233         if (ret)
2234                 goto out;
2235
2236         if (format->which == V4L2_SUBDEV_FORMAT_TRY)
2237                 fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
2238         else
2239                 fmt = &sensor->fmt;
2240
2241         *fmt = *mbus_fmt;
2242
2243         if (new_mode != sensor->current_mode) {
2244                 sensor->current_mode = new_mode;
2245                 sensor->pending_mode_change = true;
2246         }
2247         if (mbus_fmt->code != sensor->fmt.code)
2248                 sensor->pending_fmt_change = true;
2249
2250         __v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate,
2251                                  ov5640_calc_pixel_rate(sensor));
2252 out:
2253         mutex_unlock(&sensor->lock);
2254         return ret;
2255 }
2256
2257 static int ov5640_set_framefmt(struct ov5640_dev *sensor,
2258                                struct v4l2_mbus_framefmt *format)
2259 {
2260         int ret = 0;
2261         bool is_jpeg = false;
2262         u8 fmt, mux;
2263
2264         switch (format->code) {
2265         case MEDIA_BUS_FMT_UYVY8_2X8:
2266                 /* YUV422, UYVY */
2267                 fmt = 0x3f;
2268                 mux = OV5640_FMT_MUX_YUV422;
2269                 break;
2270         case MEDIA_BUS_FMT_YUYV8_2X8:
2271                 /* YUV422, YUYV */
2272                 fmt = 0x30;
2273                 mux = OV5640_FMT_MUX_YUV422;
2274                 break;
2275         case MEDIA_BUS_FMT_RGB565_2X8_LE:
2276                 /* RGB565 {g[2:0],b[4:0]},{r[4:0],g[5:3]} */
2277                 fmt = 0x6F;
2278                 mux = OV5640_FMT_MUX_RGB;
2279                 break;
2280         case MEDIA_BUS_FMT_RGB565_2X8_BE:
2281                 /* RGB565 {r[4:0],g[5:3]},{g[2:0],b[4:0]} */
2282                 fmt = 0x61;
2283                 mux = OV5640_FMT_MUX_RGB;
2284                 break;
2285         case MEDIA_BUS_FMT_JPEG_1X8:
2286                 /* YUV422, YUYV */
2287                 fmt = 0x30;
2288                 mux = OV5640_FMT_MUX_YUV422;
2289                 is_jpeg = true;
2290                 break;
2291         case MEDIA_BUS_FMT_SBGGR8_1X8:
2292                 /* Raw, BGBG... / GRGR... */
2293                 fmt = 0x00;
2294                 mux = OV5640_FMT_MUX_RAW_DPC;
2295                 break;
2296         case MEDIA_BUS_FMT_SGBRG8_1X8:
2297                 /* Raw bayer, GBGB... / RGRG... */
2298                 fmt = 0x01;
2299                 mux = OV5640_FMT_MUX_RAW_DPC;
2300                 break;
2301         case MEDIA_BUS_FMT_SGRBG8_1X8:
2302                 /* Raw bayer, GRGR... / BGBG... */
2303                 fmt = 0x02;
2304                 mux = OV5640_FMT_MUX_RAW_DPC;
2305                 break;
2306         case MEDIA_BUS_FMT_SRGGB8_1X8:
2307                 /* Raw bayer, RGRG... / GBGB... */
2308                 fmt = 0x03;
2309                 mux = OV5640_FMT_MUX_RAW_DPC;
2310                 break;
2311         default:
2312                 return -EINVAL;
2313         }
2314
2315         /* FORMAT CONTROL00: YUV and RGB formatting */
2316         ret = ov5640_write_reg(sensor, OV5640_REG_FORMAT_CONTROL00, fmt);
2317         if (ret)
2318                 return ret;
2319
2320         /* FORMAT MUX CONTROL: ISP YUV or RGB */
2321         ret = ov5640_write_reg(sensor, OV5640_REG_ISP_FORMAT_MUX_CTRL, mux);
2322         if (ret)
2323                 return ret;
2324
2325         /*
2326          * TIMING TC REG21:
2327          * - [5]:       JPEG enable
2328          */
2329         ret = ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
2330                              BIT(5), is_jpeg ? BIT(5) : 0);
2331         if (ret)
2332                 return ret;
2333
2334         /*
2335          * SYSTEM RESET02:
2336          * - [4]:       Reset JFIFO
2337          * - [3]:       Reset SFIFO
2338          * - [2]:       Reset JPEG
2339          */
2340         ret = ov5640_mod_reg(sensor, OV5640_REG_SYS_RESET02,
2341                              BIT(4) | BIT(3) | BIT(2),
2342                              is_jpeg ? 0 : (BIT(4) | BIT(3) | BIT(2)));
2343         if (ret)
2344                 return ret;
2345
2346         /*
2347          * CLOCK ENABLE02:
2348          * - [5]:       Enable JPEG 2x clock
2349          * - [3]:       Enable JPEG clock
2350          */
2351         return ov5640_mod_reg(sensor, OV5640_REG_SYS_CLOCK_ENABLE02,
2352                               BIT(5) | BIT(3),
2353                               is_jpeg ? (BIT(5) | BIT(3)) : 0);
2354 }
2355
2356 /*
2357  * Sensor Controls.
2358  */
2359
2360 static int ov5640_set_ctrl_hue(struct ov5640_dev *sensor, int value)
2361 {
2362         int ret;
2363
2364         if (value) {
2365                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
2366                                      BIT(0), BIT(0));
2367                 if (ret)
2368                         return ret;
2369                 ret = ov5640_write_reg16(sensor, OV5640_REG_SDE_CTRL1, value);
2370         } else {
2371                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(0), 0);
2372         }
2373
2374         return ret;
2375 }
2376
2377 static int ov5640_set_ctrl_contrast(struct ov5640_dev *sensor, int value)
2378 {
2379         int ret;
2380
2381         if (value) {
2382                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
2383                                      BIT(2), BIT(2));
2384                 if (ret)
2385                         return ret;
2386                 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL5,
2387                                        value & 0xff);
2388         } else {
2389                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(2), 0);
2390         }
2391
2392         return ret;
2393 }
2394
2395 static int ov5640_set_ctrl_saturation(struct ov5640_dev *sensor, int value)
2396 {
2397         int ret;
2398
2399         if (value) {
2400                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0,
2401                                      BIT(1), BIT(1));
2402                 if (ret)
2403                         return ret;
2404                 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL3,
2405                                        value & 0xff);
2406                 if (ret)
2407                         return ret;
2408                 ret = ov5640_write_reg(sensor, OV5640_REG_SDE_CTRL4,
2409                                        value & 0xff);
2410         } else {
2411                 ret = ov5640_mod_reg(sensor, OV5640_REG_SDE_CTRL0, BIT(1), 0);
2412         }
2413
2414         return ret;
2415 }
2416
2417 static int ov5640_set_ctrl_white_balance(struct ov5640_dev *sensor, int awb)
2418 {
2419         int ret;
2420
2421         ret = ov5640_mod_reg(sensor, OV5640_REG_AWB_MANUAL_CTRL,
2422                              BIT(0), awb ? 0 : 1);
2423         if (ret)
2424                 return ret;
2425
2426         if (!awb) {
2427                 u16 red = (u16)sensor->ctrls.red_balance->val;
2428                 u16 blue = (u16)sensor->ctrls.blue_balance->val;
2429
2430                 ret = ov5640_write_reg16(sensor, OV5640_REG_AWB_R_GAIN, red);
2431                 if (ret)
2432                         return ret;
2433                 ret = ov5640_write_reg16(sensor, OV5640_REG_AWB_B_GAIN, blue);
2434         }
2435
2436         return ret;
2437 }
2438
2439 static int ov5640_set_ctrl_exposure(struct ov5640_dev *sensor,
2440                                     enum v4l2_exposure_auto_type auto_exposure)
2441 {
2442         struct ov5640_ctrls *ctrls = &sensor->ctrls;
2443         bool auto_exp = (auto_exposure == V4L2_EXPOSURE_AUTO);
2444         int ret = 0;
2445
2446         if (ctrls->auto_exp->is_new) {
2447                 ret = ov5640_set_autoexposure(sensor, auto_exp);
2448                 if (ret)
2449                         return ret;
2450         }
2451
2452         if (!auto_exp && ctrls->exposure->is_new) {
2453                 u16 max_exp;
2454
2455                 ret = ov5640_read_reg16(sensor, OV5640_REG_AEC_PK_VTS,
2456                                         &max_exp);
2457                 if (ret)
2458                         return ret;
2459                 ret = ov5640_get_vts(sensor);
2460                 if (ret < 0)
2461                         return ret;
2462                 max_exp += ret;
2463                 ret = 0;
2464
2465                 if (ctrls->exposure->val < max_exp)
2466                         ret = ov5640_set_exposure(sensor, ctrls->exposure->val);
2467         }
2468
2469         return ret;
2470 }
2471
2472 static int ov5640_set_ctrl_gain(struct ov5640_dev *sensor, bool auto_gain)
2473 {
2474         struct ov5640_ctrls *ctrls = &sensor->ctrls;
2475         int ret = 0;
2476
2477         if (ctrls->auto_gain->is_new) {
2478                 ret = ov5640_set_autogain(sensor, auto_gain);
2479                 if (ret)
2480                         return ret;
2481         }
2482
2483         if (!auto_gain && ctrls->gain->is_new)
2484                 ret = ov5640_set_gain(sensor, ctrls->gain->val);
2485
2486         return ret;
2487 }
2488
2489 static const char * const test_pattern_menu[] = {
2490         "Disabled",
2491         "Color bars",
2492         "Color bars w/ rolling bar",
2493         "Color squares",
2494         "Color squares w/ rolling bar",
2495 };
2496
2497 #define OV5640_TEST_ENABLE              BIT(7)
2498 #define OV5640_TEST_ROLLING             BIT(6)  /* rolling horizontal bar */
2499 #define OV5640_TEST_TRANSPARENT         BIT(5)
2500 #define OV5640_TEST_SQUARE_BW           BIT(4)  /* black & white squares */
2501 #define OV5640_TEST_BAR_STANDARD        (0 << 2)
2502 #define OV5640_TEST_BAR_VERT_CHANGE_1   (1 << 2)
2503 #define OV5640_TEST_BAR_HOR_CHANGE      (2 << 2)
2504 #define OV5640_TEST_BAR_VERT_CHANGE_2   (3 << 2)
2505 #define OV5640_TEST_BAR                 (0 << 0)
2506 #define OV5640_TEST_RANDOM              (1 << 0)
2507 #define OV5640_TEST_SQUARE              (2 << 0)
2508 #define OV5640_TEST_BLACK               (3 << 0)
2509
2510 static const u8 test_pattern_val[] = {
2511         0,
2512         OV5640_TEST_ENABLE | OV5640_TEST_BAR_VERT_CHANGE_1 |
2513                 OV5640_TEST_BAR,
2514         OV5640_TEST_ENABLE | OV5640_TEST_ROLLING |
2515                 OV5640_TEST_BAR_VERT_CHANGE_1 | OV5640_TEST_BAR,
2516         OV5640_TEST_ENABLE | OV5640_TEST_SQUARE,
2517         OV5640_TEST_ENABLE | OV5640_TEST_ROLLING | OV5640_TEST_SQUARE,
2518 };
2519
2520 static int ov5640_set_ctrl_test_pattern(struct ov5640_dev *sensor, int value)
2521 {
2522         return ov5640_write_reg(sensor, OV5640_REG_PRE_ISP_TEST_SET1,
2523                                 test_pattern_val[value]);
2524 }
2525
2526 static int ov5640_set_ctrl_light_freq(struct ov5640_dev *sensor, int value)
2527 {
2528         int ret;
2529
2530         ret = ov5640_mod_reg(sensor, OV5640_REG_HZ5060_CTRL01, BIT(7),
2531                              (value == V4L2_CID_POWER_LINE_FREQUENCY_AUTO) ?
2532                              0 : BIT(7));
2533         if (ret)
2534                 return ret;
2535
2536         return ov5640_mod_reg(sensor, OV5640_REG_HZ5060_CTRL00, BIT(2),
2537                               (value == V4L2_CID_POWER_LINE_FREQUENCY_50HZ) ?
2538                               BIT(2) : 0);
2539 }
2540
2541 static int ov5640_set_ctrl_hflip(struct ov5640_dev *sensor, int value)
2542 {
2543         /*
2544          * If sensor is mounted upside down, mirror logic is inversed.
2545          *
2546          * Sensor is a BSI (Back Side Illuminated) one,
2547          * so image captured is physically mirrored.
2548          * This is why mirror logic is inversed in
2549          * order to cancel this mirror effect.
2550          */
2551
2552         /*
2553          * TIMING TC REG21:
2554          * - [2]:       ISP mirror
2555          * - [1]:       Sensor mirror
2556          */
2557         return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG21,
2558                               BIT(2) | BIT(1),
2559                               (!(value ^ sensor->upside_down)) ?
2560                               (BIT(2) | BIT(1)) : 0);
2561 }
2562
2563 static int ov5640_set_ctrl_vflip(struct ov5640_dev *sensor, int value)
2564 {
2565         /* If sensor is mounted upside down, flip logic is inversed */
2566
2567         /*
2568          * TIMING TC REG20:
2569          * - [2]:       ISP vflip
2570          * - [1]:       Sensor vflip
2571          */
2572         return ov5640_mod_reg(sensor, OV5640_REG_TIMING_TC_REG20,
2573                               BIT(2) | BIT(1),
2574                               (value ^ sensor->upside_down) ?
2575                               (BIT(2) | BIT(1)) : 0);
2576 }
2577
2578 static int ov5640_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
2579 {
2580         struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
2581         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2582         int val;
2583
2584         /* v4l2_ctrl_lock() locks our own mutex */
2585
2586         switch (ctrl->id) {
2587         case V4L2_CID_AUTOGAIN:
2588                 val = ov5640_get_gain(sensor);
2589                 if (val < 0)
2590                         return val;
2591                 sensor->ctrls.gain->val = val;
2592                 break;
2593         case V4L2_CID_EXPOSURE_AUTO:
2594                 val = ov5640_get_exposure(sensor);
2595                 if (val < 0)
2596                         return val;
2597                 sensor->ctrls.exposure->val = val;
2598                 break;
2599         }
2600
2601         return 0;
2602 }
2603
2604 static int ov5640_s_ctrl(struct v4l2_ctrl *ctrl)
2605 {
2606         struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
2607         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2608         int ret;
2609
2610         /* v4l2_ctrl_lock() locks our own mutex */
2611
2612         /*
2613          * If the device is not powered up by the host driver do
2614          * not apply any controls to H/W at this time. Instead
2615          * the controls will be restored right after power-up.
2616          */
2617         if (sensor->power_count == 0)
2618                 return 0;
2619
2620         switch (ctrl->id) {
2621         case V4L2_CID_AUTOGAIN:
2622                 ret = ov5640_set_ctrl_gain(sensor, ctrl->val);
2623                 break;
2624         case V4L2_CID_EXPOSURE_AUTO:
2625                 ret = ov5640_set_ctrl_exposure(sensor, ctrl->val);
2626                 break;
2627         case V4L2_CID_AUTO_WHITE_BALANCE:
2628                 ret = ov5640_set_ctrl_white_balance(sensor, ctrl->val);
2629                 break;
2630         case V4L2_CID_HUE:
2631                 ret = ov5640_set_ctrl_hue(sensor, ctrl->val);
2632                 break;
2633         case V4L2_CID_CONTRAST:
2634                 ret = ov5640_set_ctrl_contrast(sensor, ctrl->val);
2635                 break;
2636         case V4L2_CID_SATURATION:
2637                 ret = ov5640_set_ctrl_saturation(sensor, ctrl->val);
2638                 break;
2639         case V4L2_CID_TEST_PATTERN:
2640                 ret = ov5640_set_ctrl_test_pattern(sensor, ctrl->val);
2641                 break;
2642         case V4L2_CID_POWER_LINE_FREQUENCY:
2643                 ret = ov5640_set_ctrl_light_freq(sensor, ctrl->val);
2644                 break;
2645         case V4L2_CID_HFLIP:
2646                 ret = ov5640_set_ctrl_hflip(sensor, ctrl->val);
2647                 break;
2648         case V4L2_CID_VFLIP:
2649                 ret = ov5640_set_ctrl_vflip(sensor, ctrl->val);
2650                 break;
2651         default:
2652                 ret = -EINVAL;
2653                 break;
2654         }
2655
2656         return ret;
2657 }
2658
2659 static const struct v4l2_ctrl_ops ov5640_ctrl_ops = {
2660         .g_volatile_ctrl = ov5640_g_volatile_ctrl,
2661         .s_ctrl = ov5640_s_ctrl,
2662 };
2663
2664 static int ov5640_init_controls(struct ov5640_dev *sensor)
2665 {
2666         const struct v4l2_ctrl_ops *ops = &ov5640_ctrl_ops;
2667         struct ov5640_ctrls *ctrls = &sensor->ctrls;
2668         struct v4l2_ctrl_handler *hdl = &ctrls->handler;
2669         int ret;
2670
2671         v4l2_ctrl_handler_init(hdl, 32);
2672
2673         /* we can use our own mutex for the ctrl lock */
2674         hdl->lock = &sensor->lock;
2675
2676         /* Clock related controls */
2677         ctrls->pixel_rate = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_PIXEL_RATE,
2678                                               0, INT_MAX, 1,
2679                                               ov5640_calc_pixel_rate(sensor));
2680
2681         /* Auto/manual white balance */
2682         ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops,
2683                                            V4L2_CID_AUTO_WHITE_BALANCE,
2684                                            0, 1, 1, 1);
2685         ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE,
2686                                                 0, 4095, 1, 0);
2687         ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE,
2688                                                0, 4095, 1, 0);
2689         /* Auto/manual exposure */
2690         ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops,
2691                                                  V4L2_CID_EXPOSURE_AUTO,
2692                                                  V4L2_EXPOSURE_MANUAL, 0,
2693                                                  V4L2_EXPOSURE_AUTO);
2694         ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
2695                                             0, 65535, 1, 0);
2696         /* Auto/manual gain */
2697         ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN,
2698                                              0, 1, 1, 1);
2699         ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN,
2700                                         0, 1023, 1, 0);
2701
2702         ctrls->saturation = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION,
2703                                               0, 255, 1, 64);
2704         ctrls->hue = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HUE,
2705                                        0, 359, 1, 0);
2706         ctrls->contrast = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST,
2707                                             0, 255, 1, 0);
2708         ctrls->test_pattern =
2709                 v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN,
2710                                              ARRAY_SIZE(test_pattern_menu) - 1,
2711                                              0, 0, test_pattern_menu);
2712         ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP,
2713                                          0, 1, 1, 0);
2714         ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP,
2715                                          0, 1, 1, 0);
2716
2717         ctrls->light_freq =
2718                 v4l2_ctrl_new_std_menu(hdl, ops,
2719                                        V4L2_CID_POWER_LINE_FREQUENCY,
2720                                        V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
2721                                        V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
2722
2723         if (hdl->error) {
2724                 ret = hdl->error;
2725                 goto free_ctrls;
2726         }
2727
2728         ctrls->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
2729         ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
2730         ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;
2731
2732         v4l2_ctrl_auto_cluster(3, &ctrls->auto_wb, 0, false);
2733         v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true);
2734         v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true);
2735
2736         sensor->sd.ctrl_handler = hdl;
2737         return 0;
2738
2739 free_ctrls:
2740         v4l2_ctrl_handler_free(hdl);
2741         return ret;
2742 }
2743
2744 static int ov5640_enum_frame_size(struct v4l2_subdev *sd,
2745                                   struct v4l2_subdev_pad_config *cfg,
2746                                   struct v4l2_subdev_frame_size_enum *fse)
2747 {
2748         if (fse->pad != 0)
2749                 return -EINVAL;
2750         if (fse->index >= OV5640_NUM_MODES)
2751                 return -EINVAL;
2752
2753         fse->min_width =
2754                 ov5640_mode_data[fse->index].hact;
2755         fse->max_width = fse->min_width;
2756         fse->min_height =
2757                 ov5640_mode_data[fse->index].vact;
2758         fse->max_height = fse->min_height;
2759
2760         return 0;
2761 }
2762
2763 static int ov5640_enum_frame_interval(
2764         struct v4l2_subdev *sd,
2765         struct v4l2_subdev_pad_config *cfg,
2766         struct v4l2_subdev_frame_interval_enum *fie)
2767 {
2768         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2769         struct v4l2_fract tpf;
2770         int ret;
2771
2772         if (fie->pad != 0)
2773                 return -EINVAL;
2774         if (fie->index >= OV5640_NUM_FRAMERATES)
2775                 return -EINVAL;
2776
2777         tpf.numerator = 1;
2778         tpf.denominator = ov5640_framerates[fie->index];
2779
2780         ret = ov5640_try_frame_interval(sensor, &tpf,
2781                                         fie->width, fie->height);
2782         if (ret < 0)
2783                 return -EINVAL;
2784
2785         fie->interval = tpf;
2786         return 0;
2787 }
2788
2789 static int ov5640_g_frame_interval(struct v4l2_subdev *sd,
2790                                    struct v4l2_subdev_frame_interval *fi)
2791 {
2792         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2793
2794         mutex_lock(&sensor->lock);
2795         fi->interval = sensor->frame_interval;
2796         mutex_unlock(&sensor->lock);
2797
2798         return 0;
2799 }
2800
2801 static int ov5640_s_frame_interval(struct v4l2_subdev *sd,
2802                                    struct v4l2_subdev_frame_interval *fi)
2803 {
2804         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2805         const struct ov5640_mode_info *mode;
2806         int frame_rate, ret = 0;
2807
2808         if (fi->pad != 0)
2809                 return -EINVAL;
2810
2811         mutex_lock(&sensor->lock);
2812
2813         if (sensor->streaming) {
2814                 ret = -EBUSY;
2815                 goto out;
2816         }
2817
2818         mode = sensor->current_mode;
2819
2820         frame_rate = ov5640_try_frame_interval(sensor, &fi->interval,
2821                                                mode->hact, mode->vact);
2822         if (frame_rate < 0) {
2823                 /* Always return a valid frame interval value */
2824                 fi->interval = sensor->frame_interval;
2825                 goto out;
2826         }
2827
2828         mode = ov5640_find_mode(sensor, frame_rate, mode->hact,
2829                                 mode->vact, true);
2830         if (!mode) {
2831                 ret = -EINVAL;
2832                 goto out;
2833         }
2834
2835         if (mode != sensor->current_mode ||
2836             frame_rate != sensor->current_fr) {
2837                 sensor->current_fr = frame_rate;
2838                 sensor->frame_interval = fi->interval;
2839                 sensor->current_mode = mode;
2840                 sensor->pending_mode_change = true;
2841
2842                 __v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate,
2843                                          ov5640_calc_pixel_rate(sensor));
2844         }
2845 out:
2846         mutex_unlock(&sensor->lock);
2847         return ret;
2848 }
2849
2850 static int ov5640_enum_mbus_code(struct v4l2_subdev *sd,
2851                                  struct v4l2_subdev_pad_config *cfg,
2852                                  struct v4l2_subdev_mbus_code_enum *code)
2853 {
2854         if (code->pad != 0)
2855                 return -EINVAL;
2856         if (code->index >= ARRAY_SIZE(ov5640_formats))
2857                 return -EINVAL;
2858
2859         code->code = ov5640_formats[code->index].code;
2860         return 0;
2861 }
2862
2863 static int ov5640_s_stream(struct v4l2_subdev *sd, int enable)
2864 {
2865         struct ov5640_dev *sensor = to_ov5640_dev(sd);
2866         int ret = 0;
2867
2868         mutex_lock(&sensor->lock);
2869
2870         if (sensor->streaming == !enable) {
2871                 if (enable && sensor->pending_mode_change) {
2872                         ret = ov5640_set_mode(sensor);
2873                         if (ret)
2874                                 goto out;
2875                 }
2876
2877                 if (enable && sensor->pending_fmt_change) {
2878                         ret = ov5640_set_framefmt(sensor, &sensor->fmt);
2879                         if (ret)
2880                                 goto out;
2881                         sensor->pending_fmt_change = false;
2882                 }
2883
2884                 if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY)
2885                         ret = ov5640_set_stream_mipi(sensor, enable);
2886                 else
2887                         ret = ov5640_set_stream_dvp(sensor, enable);
2888
2889                 if (!ret)
2890                         sensor->streaming = enable;
2891         }
2892 out:
2893         mutex_unlock(&sensor->lock);
2894         return ret;
2895 }
2896
2897 static const struct v4l2_subdev_core_ops ov5640_core_ops = {
2898         .s_power = ov5640_s_power,
2899         .log_status = v4l2_ctrl_subdev_log_status,
2900         .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
2901         .unsubscribe_event = v4l2_event_subdev_unsubscribe,
2902 };
2903
2904 static const struct v4l2_subdev_video_ops ov5640_video_ops = {
2905         .g_frame_interval = ov5640_g_frame_interval,
2906         .s_frame_interval = ov5640_s_frame_interval,
2907         .s_stream = ov5640_s_stream,
2908 };
2909
2910 static const struct v4l2_subdev_pad_ops ov5640_pad_ops = {
2911         .enum_mbus_code = ov5640_enum_mbus_code,
2912         .get_fmt = ov5640_get_fmt,
2913         .set_fmt = ov5640_set_fmt,
2914         .enum_frame_size = ov5640_enum_frame_size,
2915         .enum_frame_interval = ov5640_enum_frame_interval,
2916 };
2917
2918 static const struct v4l2_subdev_ops ov5640_subdev_ops = {
2919         .core = &ov5640_core_ops,
2920         .video = &ov5640_video_ops,
2921         .pad = &ov5640_pad_ops,
2922 };
2923
2924 static int ov5640_get_regulators(struct ov5640_dev *sensor)
2925 {
2926         int i;
2927
2928         for (i = 0; i < OV5640_NUM_SUPPLIES; i++)
2929                 sensor->supplies[i].supply = ov5640_supply_name[i];
2930
2931         return devm_regulator_bulk_get(&sensor->i2c_client->dev,
2932                                        OV5640_NUM_SUPPLIES,
2933                                        sensor->supplies);
2934 }
2935
2936 static int ov5640_check_chip_id(struct ov5640_dev *sensor)
2937 {
2938         struct i2c_client *client = sensor->i2c_client;
2939         int ret = 0;
2940         u16 chip_id;
2941
2942         ret = ov5640_set_power_on(sensor);
2943         if (ret)
2944                 return ret;
2945
2946         ret = ov5640_read_reg16(sensor, OV5640_REG_CHIP_ID, &chip_id);
2947         if (ret) {
2948                 dev_err(&client->dev, "%s: failed to read chip identifier\n",
2949                         __func__);
2950                 goto power_off;
2951         }
2952
2953         if (chip_id != 0x5640) {
2954                 dev_err(&client->dev, "%s: wrong chip identifier, expected 0x5640, got 0x%x\n",
2955                         __func__, chip_id);
2956                 ret = -ENXIO;
2957         }
2958
2959 power_off:
2960         ov5640_set_power_off(sensor);
2961         return ret;
2962 }
2963
2964 static int ov5640_probe(struct i2c_client *client)
2965 {
2966         struct device *dev = &client->dev;
2967         struct fwnode_handle *endpoint;
2968         struct ov5640_dev *sensor;
2969         struct v4l2_mbus_framefmt *fmt;
2970         u32 rotation;
2971         int ret;
2972
2973         sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
2974         if (!sensor)
2975                 return -ENOMEM;
2976
2977         sensor->i2c_client = client;
2978
2979         /*
2980          * default init sequence initialize sensor to
2981          * YUV422 UYVY VGA@30fps
2982          */
2983         fmt = &sensor->fmt;
2984         fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
2985         fmt->colorspace = V4L2_COLORSPACE_SRGB;
2986         fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
2987         fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
2988         fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
2989         fmt->width = 640;
2990         fmt->height = 480;
2991         fmt->field = V4L2_FIELD_NONE;
2992         sensor->frame_interval.numerator = 1;
2993         sensor->frame_interval.denominator = ov5640_framerates[OV5640_30_FPS];
2994         sensor->current_fr = OV5640_30_FPS;
2995         sensor->current_mode =
2996                 &ov5640_mode_data[OV5640_MODE_VGA_640_480];
2997         sensor->last_mode = sensor->current_mode;
2998
2999         sensor->ae_target = 52;
3000
3001         /* optional indication of physical rotation of sensor */
3002         ret = fwnode_property_read_u32(dev_fwnode(&client->dev), "rotation",
3003                                        &rotation);
3004         if (!ret) {
3005                 switch (rotation) {
3006                 case 180:
3007                         sensor->upside_down = true;
3008                         /* fall through */
3009                 case 0:
3010                         break;
3011                 default:
3012                         dev_warn(dev, "%u degrees rotation is not supported, ignoring...\n",
3013                                  rotation);
3014                 }
3015         }
3016
3017         endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(&client->dev),
3018                                                   NULL);
3019         if (!endpoint) {
3020                 dev_err(dev, "endpoint node not found\n");
3021                 return -EINVAL;
3022         }
3023
3024         ret = v4l2_fwnode_endpoint_parse(endpoint, &sensor->ep);
3025         fwnode_handle_put(endpoint);
3026         if (ret) {
3027                 dev_err(dev, "Could not parse endpoint\n");
3028                 return ret;
3029         }
3030
3031         /* get system clock (xclk) */
3032         sensor->xclk = devm_clk_get(dev, "xclk");
3033         if (IS_ERR(sensor->xclk)) {
3034                 dev_err(dev, "failed to get xclk\n");
3035                 return PTR_ERR(sensor->xclk);
3036         }
3037
3038         sensor->xclk_freq = clk_get_rate(sensor->xclk);
3039         if (sensor->xclk_freq < OV5640_XCLK_MIN ||
3040             sensor->xclk_freq > OV5640_XCLK_MAX) {
3041                 dev_err(dev, "xclk frequency out of range: %d Hz\n",
3042                         sensor->xclk_freq);
3043                 return -EINVAL;
3044         }
3045
3046         /* request optional power down pin */
3047         sensor->pwdn_gpio = devm_gpiod_get_optional(dev, "powerdown",
3048                                                     GPIOD_OUT_HIGH);
3049         if (IS_ERR(sensor->pwdn_gpio))
3050                 return PTR_ERR(sensor->pwdn_gpio);
3051
3052         /* request optional reset pin */
3053         sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset",
3054                                                      GPIOD_OUT_HIGH);
3055         if (IS_ERR(sensor->reset_gpio))
3056                 return PTR_ERR(sensor->reset_gpio);
3057
3058         v4l2_i2c_subdev_init(&sensor->sd, client, &ov5640_subdev_ops);
3059
3060         sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
3061                             V4L2_SUBDEV_FL_HAS_EVENTS;
3062         sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
3063         sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
3064         ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
3065         if (ret)
3066                 return ret;
3067
3068         ret = ov5640_get_regulators(sensor);
3069         if (ret)
3070                 return ret;
3071
3072         mutex_init(&sensor->lock);
3073
3074         ret = ov5640_check_chip_id(sensor);
3075         if (ret)
3076                 goto entity_cleanup;
3077
3078         ret = ov5640_init_controls(sensor);
3079         if (ret)
3080                 goto entity_cleanup;
3081
3082         ret = v4l2_async_register_subdev_sensor_common(&sensor->sd);
3083         if (ret)
3084                 goto free_ctrls;
3085
3086         return 0;
3087
3088 free_ctrls:
3089         v4l2_ctrl_handler_free(&sensor->ctrls.handler);
3090 entity_cleanup:
3091         mutex_destroy(&sensor->lock);
3092         media_entity_cleanup(&sensor->sd.entity);
3093         return ret;
3094 }
3095
3096 static int ov5640_remove(struct i2c_client *client)
3097 {
3098         struct v4l2_subdev *sd = i2c_get_clientdata(client);
3099         struct ov5640_dev *sensor = to_ov5640_dev(sd);
3100
3101         v4l2_async_unregister_subdev(&sensor->sd);
3102         mutex_destroy(&sensor->lock);
3103         media_entity_cleanup(&sensor->sd.entity);
3104         v4l2_ctrl_handler_free(&sensor->ctrls.handler);
3105
3106         return 0;
3107 }
3108
3109 static const struct i2c_device_id ov5640_id[] = {
3110         {"ov5640", 0},
3111         {},
3112 };
3113 MODULE_DEVICE_TABLE(i2c, ov5640_id);
3114
3115 static const struct of_device_id ov5640_dt_ids[] = {
3116         { .compatible = "ovti,ov5640" },
3117         { /* sentinel */ }
3118 };
3119 MODULE_DEVICE_TABLE(of, ov5640_dt_ids);
3120
3121 static struct i2c_driver ov5640_i2c_driver = {
3122         .driver = {
3123                 .name  = "ov5640",
3124                 .of_match_table = ov5640_dt_ids,
3125         },
3126         .id_table = ov5640_id,
3127         .probe_new = ov5640_probe,
3128         .remove   = ov5640_remove,
3129 };
3130
3131 module_i2c_driver(ov5640_i2c_driver);
3132
3133 MODULE_DESCRIPTION("OV5640 MIPI Camera Subdev Driver");
3134 MODULE_LICENSE("GPL");