drivers/media/i2c/ov9282.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * OmniVision ov9282 Camera Sensor Driver
   4  *
   5  * Copyright (C) 2021 Intel Corporation
   6  */
   7 #include <asm/unaligned.h>
   8
   9 #include <linux/clk.h>
  10 #include <linux/delay.h>
  11 #include <linux/i2c.h>
  12 #include <linux/module.h>
  13 #include <linux/pm_runtime.h>
  14 #include <linux/regulator/consumer.h>
  15
  16 #include <media/v4l2-ctrls.h>
  17 #include <media/v4l2-event.h>
  18 #include <media/v4l2-fwnode.h>
  19 #include <media/v4l2-subdev.h>
  20
  21 /* Streaming Mode */
  22 #define OV9282_REG_MODE_SELECT  0x0100
  23 #define OV9282_MODE_STANDBY     0x00
  24 #define OV9282_MODE_STREAMING   0x01
  25
  26 #define OV9282_REG_PLL_CTRL_0D  0x030d
  27 #define OV9282_PLL_CTRL_0D_RAW8         0x60
  28 #define OV9282_PLL_CTRL_0D_RAW10        0x50
  29
  30 #define OV9282_REG_TIMING_HTS   0x380c
  31 #define OV9282_TIMING_HTS_MAX   0x7fff
  32
  33 /* Lines per frame */
  34 #define OV9282_REG_LPFR         0x380e
  35
  36 /* Chip ID */
  37 #define OV9282_REG_ID           0x300a
  38 #define OV9282_ID               0x9281
  39
  40 /* Exposure control */
  41 #define OV9282_REG_EXPOSURE     0x3500
  42 #define OV9282_EXPOSURE_MIN     1
  43 #define OV9282_EXPOSURE_OFFSET  12
  44 #define OV9282_EXPOSURE_STEP    1
  45 #define OV9282_EXPOSURE_DEFAULT 0x0282
  46
  47 /* Analog gain control */
  48 #define OV9282_REG_AGAIN        0x3509
  49 #define OV9282_AGAIN_MIN        0x10
  50 #define OV9282_AGAIN_MAX        0xff
  51 #define OV9282_AGAIN_STEP       1
  52 #define OV9282_AGAIN_DEFAULT    0x10
  53
  54 /* Group hold register */
  55 #define OV9282_REG_HOLD         0x3308
  56
  57 #define OV9282_REG_ANA_CORE_2   0x3662
  58 #define OV9282_ANA_CORE2_RAW8   0x07
  59 #define OV9282_ANA_CORE2_RAW10  0x05
  60
  61 #define OV9282_REG_TIMING_FORMAT_1      0x3820
  62 #define OV9282_REG_TIMING_FORMAT_2      0x3821
  63 #define OV9282_FLIP_BIT                 BIT(2)
  64
  65 #define OV9282_REG_MIPI_CTRL00  0x4800
  66 #define OV9282_GATED_CLOCK      BIT(5)
  67
  68 /* Input clock rate */
  69 #define OV9282_INCLK_RATE       24000000
  70
  71 /* CSI2 HW configuration */
  72 #define OV9282_LINK_FREQ        400000000
  73 #define OV9282_NUM_DATA_LANES   2
  74
  75 /* Pixel rate */
  76 #define OV9282_PIXEL_RATE_10BIT         (OV9282_LINK_FREQ * 2 * \
  77                                          OV9282_NUM_DATA_LANES / 10)
  78 #define OV9282_PIXEL_RATE_8BIT          (OV9282_LINK_FREQ * 2 * \
  79                                          OV9282_NUM_DATA_LANES / 8)
  80
  81 /*
  82  * OV9282 native and active pixel array size.
  83  * 8 dummy rows/columns on each edge of a 1280x800 active array
  84  */
  85 #define OV9282_NATIVE_WIDTH             1296U
  86 #define OV9282_NATIVE_HEIGHT            816U
  87 #define OV9282_PIXEL_ARRAY_LEFT         8U
  88 #define OV9282_PIXEL_ARRAY_TOP          8U
  89 #define OV9282_PIXEL_ARRAY_WIDTH        1280U
  90 #define OV9282_PIXEL_ARRAY_HEIGHT       800U
  91
  92 #define OV9282_REG_MIN          0x00
  93 #define OV9282_REG_MAX          0xfffff
  94
  95 static const char * const ov9282_supply_names[] = {
  96         "avdd",         /* Analog power */
  97         "dovdd",        /* Digital I/O power */
  98         "dvdd",         /* Digital core power */
  99 };
 100
 101 #define OV9282_NUM_SUPPLIES ARRAY_SIZE(ov9282_supply_names)
 102
 103 /**
 104  * struct ov9282_reg - ov9282 sensor register
 105  * @address: Register address
 106  * @val: Register value
 107  */
 108 struct ov9282_reg {
 109         u16 address;
 110         u8 val;
 111 };
 112
 113 /**
 114  * struct ov9282_reg_list - ov9282 sensor register list
 115  * @num_of_regs: Number of registers in the list
 116  * @regs: Pointer to register list
 117  */
 118 struct ov9282_reg_list {
 119         u32 num_of_regs;
 120         const struct ov9282_reg *regs;
 121 };
 122
 123 /**
 124  * struct ov9282_mode - ov9282 sensor mode structure
 125  * @width: Frame width
 126  * @height: Frame height
 127  * @hblank_min: Minimum horizontal blanking in lines for non-continuous[0] and
 128  *              continuous[1] clock modes
 129  * @vblank: Vertical blanking in lines
 130  * @vblank_min: Minimum vertical blanking in lines
 131  * @vblank_max: Maximum vertical blanking in lines
 132  * @link_freq_idx: Link frequency index
 133  * @crop: on-sensor cropping for this mode
 134  * @reg_list: Register list for sensor mode
 135  */
 136 struct ov9282_mode {
 137         u32 width;
 138         u32 height;
 139         u32 hblank_min[2];
 140         u32 vblank;
 141         u32 vblank_min;
 142         u32 vblank_max;
 143         u32 link_freq_idx;
 144         struct v4l2_rect crop;
 145         struct ov9282_reg_list reg_list;
 146 };
 147
 148 /**
 149  * struct ov9282 - ov9282 sensor device structure
 150  * @dev: Pointer to generic device
 151  * @sd: V4L2 sub-device
 152  * @pad: Media pad. Only one pad supported
 153  * @reset_gpio: Sensor reset gpio
 154  * @inclk: Sensor input clock
 155  * @supplies: Regulator supplies for the sensor
 156  * @ctrl_handler: V4L2 control handler
 157  * @link_freq_ctrl: Pointer to link frequency control
 158  * @hblank_ctrl: Pointer to horizontal blanking control
 159  * @vblank_ctrl: Pointer to vertical blanking control
 160  * @exp_ctrl: Pointer to exposure control
 161  * @again_ctrl: Pointer to analog gain control
 162  * @pixel_rate: Pointer to pixel rate control
 163  * @vblank: Vertical blanking in lines
 164  * @noncontinuous_clock: Selection of CSI2 noncontinuous clock mode
 165  * @cur_mode: Pointer to current selected sensor mode
 166  * @code: Mbus code currently selected
 167  * @mutex: Mutex for serializing sensor controls
 168  * @streaming: Flag indicating streaming state
 169  */
 170 struct ov9282 {
 171         struct device *dev;
 172         struct v4l2_subdev sd;
 173         struct media_pad pad;
 174         struct gpio_desc *reset_gpio;
 175         struct clk *inclk;
 176         struct regulator_bulk_data supplies[OV9282_NUM_SUPPLIES];
 177         struct v4l2_ctrl_handler ctrl_handler;
 178         struct v4l2_ctrl *link_freq_ctrl;
 179         struct v4l2_ctrl *hblank_ctrl;
 180         struct v4l2_ctrl *vblank_ctrl;
 181         struct {
 182                 struct v4l2_ctrl *exp_ctrl;
 183                 struct v4l2_ctrl *again_ctrl;
 184         };
 185         struct v4l2_ctrl *pixel_rate;
 186         u32 vblank;
 187         bool noncontinuous_clock;
 188         const struct ov9282_mode *cur_mode;
 189         u32 code;
 190         struct mutex mutex;
 191         bool streaming;
 192 };
 193
 194 static const s64 link_freq[] = {
 195         OV9282_LINK_FREQ,
 196 };
 197
 198 /*
 199  * Common registers
 200  *
 201  * Note: Do NOT include a software reset (0x0103, 0x01) in any of these
 202  * register arrays as some settings are written as part of ov9282_power_on,
 203  * and the reset will clear them.
 204  */
 205 static const struct ov9282_reg common_regs[] = {
 206         {0x0302, 0x32},
 207         {0x030e, 0x02},
 208         {0x3001, 0x00},
 209         {0x3004, 0x00},
 210         {0x3005, 0x00},
 211         {0x3006, 0x04},
 212         {0x3011, 0x0a},
 213         {0x3013, 0x18},
 214         {0x301c, 0xf0},
 215         {0x3022, 0x01},
 216         {0x3030, 0x10},
 217         {0x3039, 0x32},
 218         {0x303a, 0x00},
 219         {0x3503, 0x08},
 220         {0x3505, 0x8c},
 221         {0x3507, 0x03},
 222         {0x3508, 0x00},
 223         {0x3610, 0x80},
 224         {0x3611, 0xa0},
 225         {0x3620, 0x6e},
 226         {0x3632, 0x56},
 227         {0x3633, 0x78},
 228         {0x3666, 0x00},
 229         {0x366f, 0x5a},
 230         {0x3680, 0x84},
 231         {0x3712, 0x80},
 232         {0x372d, 0x22},
 233         {0x3731, 0x80},
 234         {0x3732, 0x30},
 235         {0x377d, 0x22},
 236         {0x3788, 0x02},
 237         {0x3789, 0xa4},
 238         {0x378a, 0x00},
 239         {0x378b, 0x4a},
 240         {0x3799, 0x20},
 241         {0x3881, 0x42},
 242         {0x38a8, 0x02},
 243         {0x38a9, 0x80},
 244         {0x38b1, 0x00},
 245         {0x38c4, 0x00},
 246         {0x38c5, 0xc0},
 247         {0x38c6, 0x04},
 248         {0x38c7, 0x80},
 249         {0x3920, 0xff},
 250         {0x4010, 0x40},
 251         {0x4043, 0x40},
 252         {0x4307, 0x30},
 253         {0x4317, 0x00},
 254         {0x4501, 0x00},
 255         {0x450a, 0x08},
 256         {0x4601, 0x04},
 257         {0x470f, 0x00},
 258         {0x4f07, 0x00},
 259         {0x5000, 0x9f},
 260         {0x5001, 0x00},
 261         {0x5e00, 0x00},
 262         {0x5d00, 0x07},
 263         {0x5d01, 0x00},
 264         {0x0101, 0x01},
 265         {0x1000, 0x03},
 266         {0x5a08, 0x84},
 267 };
 268
 269 static struct ov9282_reg_list common_regs_list = {
 270         .num_of_regs = ARRAY_SIZE(common_regs),
 271         .regs = common_regs,
 272 };
 273
 274 #define MODE_1280_800           0
 275 #define MODE_1280_720           1
 276 #define MODE_640_400            2
 277
 278 #define DEFAULT_MODE            MODE_1280_720
 279
 280 /* Sensor mode registers */
 281 static const struct ov9282_reg mode_1280x800_regs[] = {
 282         {0x3778, 0x00},
 283         {0x3800, 0x00},
 284         {0x3801, 0x00},
 285         {0x3802, 0x00},
 286         {0x3803, 0x00},
 287         {0x3804, 0x05},
 288         {0x3805, 0x0f},
 289         {0x3806, 0x03},
 290         {0x3807, 0x2f},
 291         {0x3808, 0x05},
 292         {0x3809, 0x00},
 293         {0x380a, 0x03},
 294         {0x380b, 0x20},
 295         {0x3810, 0x00},
 296         {0x3811, 0x08},
 297         {0x3812, 0x00},
 298         {0x3813, 0x08},
 299         {0x3814, 0x11},
 300         {0x3815, 0x11},
 301         {0x3820, 0x40},
 302         {0x3821, 0x00},
 303         {0x4003, 0x40},
 304         {0x4008, 0x04},
 305         {0x4009, 0x0b},
 306         {0x400c, 0x00},
 307         {0x400d, 0x07},
 308         {0x4507, 0x00},
 309         {0x4509, 0x00},
 310 };
 311
 312 static const struct ov9282_reg mode_1280x720_regs[] = {
 313         {0x3778, 0x00},
 314         {0x3800, 0x00},
 315         {0x3801, 0x00},
 316         {0x3802, 0x00},
 317         {0x3803, 0x00},
 318         {0x3804, 0x05},
 319         {0x3805, 0x0f},
 320         {0x3806, 0x02},
 321         {0x3807, 0xdf},
 322         {0x3808, 0x05},
 323         {0x3809, 0x00},
 324         {0x380a, 0x02},
 325         {0x380b, 0xd0},
 326         {0x3810, 0x00},
 327         {0x3811, 0x08},
 328         {0x3812, 0x00},
 329         {0x3813, 0x08},
 330         {0x3814, 0x11},
 331         {0x3815, 0x11},
 332         {0x3820, 0x3c},
 333         {0x3821, 0x84},
 334         {0x4003, 0x40},
 335         {0x4008, 0x02},
 336         {0x4009, 0x05},
 337         {0x400c, 0x00},
 338         {0x400d, 0x03},
 339         {0x4507, 0x00},
 340         {0x4509, 0x80},
 341 };
 342
 343 static const struct ov9282_reg mode_640x400_regs[] = {
 344         {0x3778, 0x10},
 345         {0x3800, 0x00},
 346         {0x3801, 0x00},
 347         {0x3802, 0x00},
 348         {0x3803, 0x00},
 349         {0x3804, 0x05},
 350         {0x3805, 0x0f},
 351         {0x3806, 0x03},
 352         {0x3807, 0x2f},
 353         {0x3808, 0x02},
 354         {0x3809, 0x80},
 355         {0x380a, 0x01},
 356         {0x380b, 0x90},
 357         {0x3810, 0x00},
 358         {0x3811, 0x04},
 359         {0x3812, 0x00},
 360         {0x3813, 0x04},
 361         {0x3814, 0x31},
 362         {0x3815, 0x22},
 363         {0x3820, 0x60},
 364         {0x3821, 0x01},
 365         {0x4008, 0x02},
 366         {0x4009, 0x05},
 367         {0x400c, 0x00},
 368         {0x400d, 0x03},
 369         {0x4507, 0x03},
 370         {0x4509, 0x80},
 371 };
 372
 373 /* Supported sensor mode configurations */
 374 static const struct ov9282_mode supported_modes[] = {
 375         [MODE_1280_800] = {
 376                 .width = 1280,
 377                 .height = 800,
 378                 .hblank_min = { 250, 176 },
 379                 .vblank = 1022,
 380                 .vblank_min = 110,
 381                 .vblank_max = 51540,
 382                 .link_freq_idx = 0,
 383                 .crop = {
 384                         .left = OV9282_PIXEL_ARRAY_LEFT,
 385                         .top = OV9282_PIXEL_ARRAY_TOP,
 386                         .width = 1280,
 387                         .height = 800
 388                 },
 389                 .reg_list = {
 390                         .num_of_regs = ARRAY_SIZE(mode_1280x800_regs),
 391                         .regs = mode_1280x800_regs,
 392                 },
 393         },
 394         [MODE_1280_720] = {
 395                 .width = 1280,
 396                 .height = 720,
 397                 .hblank_min = { 250, 176 },
 398                 .vblank = 1022,
 399                 .vblank_min = 41,
 400                 .vblank_max = 51540,
 401                 .link_freq_idx = 0,
 402                 .crop = {
 403                         /*
 404                          * Note that this mode takes the top 720 lines from the
 405                          * 800 of the sensor. It does not take a middle crop.
 406                          */
 407                         .left = OV9282_PIXEL_ARRAY_LEFT,
 408                         .top = OV9282_PIXEL_ARRAY_TOP,
 409                         .width = 1280,
 410                         .height = 720
 411                 },
 412                 .reg_list = {
 413                         .num_of_regs = ARRAY_SIZE(mode_1280x720_regs),
 414                         .regs = mode_1280x720_regs,
 415                 },
 416         },
 417         [MODE_640_400] = {
 418                 .width = 640,
 419                 .height = 400,
 420                 .hblank_min = { 890, 816 },
 421                 .vblank = 1022,
 422                 .vblank_min = 22,
 423                 .vblank_max = 51540,
 424                 .link_freq_idx = 0,
 425                 .crop = {
 426                         .left = OV9282_PIXEL_ARRAY_LEFT,
 427                         .top = OV9282_PIXEL_ARRAY_TOP,
 428                         .width = 1280,
 429                         .height = 800
 430                 },
 431                 .reg_list = {
 432                         .num_of_regs = ARRAY_SIZE(mode_640x400_regs),
 433                         .regs = mode_640x400_regs,
 434                 },
 435         },
 436 };
 437
 438 /**
 439  * to_ov9282() - ov9282 V4L2 sub-device to ov9282 device.
 440  * @subdev: pointer to ov9282 V4L2 sub-device
 441  *
 442  * Return: pointer to ov9282 device
 443  */
 444 static inline struct ov9282 *to_ov9282(struct v4l2_subdev *subdev)
 445 {
 446         return container_of(subdev, struct ov9282, sd);
 447 }
 448
 449 /**
 450  * ov9282_read_reg() - Read registers.
 451  * @ov9282: pointer to ov9282 device
 452  * @reg: register address
 453  * @len: length of bytes to read. Max supported bytes is 4
 454  * @val: pointer to register value to be filled.
 455  *
 456  * Return: 0 if successful, error code otherwise.
 457  */
 458 static int ov9282_read_reg(struct ov9282 *ov9282, u16 reg, u32 len, u32 *val)
 459 {
 460         struct i2c_client *client = v4l2_get_subdevdata(&ov9282->sd);
 461         struct i2c_msg msgs[2] = {0};
 462         u8 addr_buf[2] = {0};
 463         u8 data_buf[4] = {0};
 464         int ret;
 465
 466         if (WARN_ON(len > 4))
 467                 return -EINVAL;
 468
 469         put_unaligned_be16(reg, addr_buf);
 470
 471         /* Write register address */
 472         msgs[0].addr = client->addr;
 473         msgs[0].flags = 0;
 474         msgs[0].len = ARRAY_SIZE(addr_buf);
 475         msgs[0].buf = addr_buf;
 476
 477         /* Read data from register */
 478         msgs[1].addr = client->addr;
 479         msgs[1].flags = I2C_M_RD;
 480         msgs[1].len = len;
 481         msgs[1].buf = &data_buf[4 - len];
 482
 483         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 484         if (ret != ARRAY_SIZE(msgs))
 485                 return -EIO;
 486
 487         *val = get_unaligned_be32(data_buf);
 488
 489         return 0;
 490 }
 491
 492 /**
 493  * ov9282_write_reg() - Write register
 494  * @ov9282: pointer to ov9282 device
 495  * @reg: register address
 496  * @len: length of bytes. Max supported bytes is 4
 497  * @val: register value
 498  *
 499  * Return: 0 if successful, error code otherwise.
 500  */
 501 static int ov9282_write_reg(struct ov9282 *ov9282, u16 reg, u32 len, u32 val)
 502 {
 503         struct i2c_client *client = v4l2_get_subdevdata(&ov9282->sd);
 504         u8 buf[6] = {0};
 505
 506         if (WARN_ON(len > 4))
 507                 return -EINVAL;
 508
 509         put_unaligned_be16(reg, buf);
 510         put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
 511         if (i2c_master_send(client, buf, len + 2) != len + 2)
 512                 return -EIO;
 513
 514         return 0;
 515 }
 516
 517 /**
 518  * ov9282_write_regs() - Write a list of registers
 519  * @ov9282: pointer to ov9282 device
 520  * @regs: list of registers to be written
 521  * @len: length of registers array
 522  *
 523  * Return: 0 if successful, error code otherwise.
 524  */
 525 static int ov9282_write_regs(struct ov9282 *ov9282,
 526                              const struct ov9282_reg *regs, u32 len)
 527 {
 528         unsigned int i;
 529         int ret;
 530
 531         for (i = 0; i < len; i++) {
 532                 ret = ov9282_write_reg(ov9282, regs[i].address, 1, regs[i].val);
 533                 if (ret)
 534                         return ret;
 535         }
 536
 537         return 0;
 538 }
 539
 540 /**
 541  * ov9282_update_controls() - Update control ranges based on streaming mode
 542  * @ov9282: pointer to ov9282 device
 543  * @mode: pointer to ov9282_mode sensor mode
 544  * @fmt: pointer to the requested mode
 545  *
 546  * Return: 0 if successful, error code otherwise.
 547  */
 548 static int ov9282_update_controls(struct ov9282 *ov9282,
 549                                   const struct ov9282_mode *mode,
 550                                   const struct v4l2_subdev_format *fmt)
 551 {
 552         u32 hblank_min;
 553         s64 pixel_rate;
 554         int ret;
 555
 556         ret = __v4l2_ctrl_s_ctrl(ov9282->link_freq_ctrl, mode->link_freq_idx);
 557         if (ret)
 558                 return ret;
 559
 560         pixel_rate = (fmt->format.code == MEDIA_BUS_FMT_Y10_1X10) ?
 561                 OV9282_PIXEL_RATE_10BIT : OV9282_PIXEL_RATE_8BIT;
 562         ret = __v4l2_ctrl_modify_range(ov9282->pixel_rate, pixel_rate,
 563                                        pixel_rate, 1, pixel_rate);
 564         if (ret)
 565                 return ret;
 566
 567         hblank_min = mode->hblank_min[ov9282->noncontinuous_clock ? 0 : 1];
 568         ret =  __v4l2_ctrl_modify_range(ov9282->hblank_ctrl, hblank_min,
 569                                         OV9282_TIMING_HTS_MAX - mode->width, 1,
 570                                         hblank_min);
 571         if (ret)
 572                 return ret;
 573
 574         return __v4l2_ctrl_modify_range(ov9282->vblank_ctrl, mode->vblank_min,
 575                                         mode->vblank_max, 1, mode->vblank);
 576 }
 577
 578 /**
 579  * ov9282_update_exp_gain() - Set updated exposure and gain
 580  * @ov9282: pointer to ov9282 device
 581  * @exposure: updated exposure value
 582  * @gain: updated analog gain value
 583  *
 584  * Return: 0 if successful, error code otherwise.
 585  */
 586 static int ov9282_update_exp_gain(struct ov9282 *ov9282, u32 exposure, u32 gain)
 587 {
 588         int ret;
 589
 590         dev_dbg(ov9282->dev, "Set exp %u, analog gain %u",
 591                 exposure, gain);
 592
 593         ret = ov9282_write_reg(ov9282, OV9282_REG_HOLD, 1, 1);
 594         if (ret)
 595                 return ret;
 596
 597         ret = ov9282_write_reg(ov9282, OV9282_REG_EXPOSURE, 3, exposure << 4);
 598         if (ret)
 599                 goto error_release_group_hold;
 600
 601         ret = ov9282_write_reg(ov9282, OV9282_REG_AGAIN, 1, gain);
 602
 603 error_release_group_hold:
 604         ov9282_write_reg(ov9282, OV9282_REG_HOLD, 1, 0);
 605
 606         return ret;
 607 }
 608
 609 static int ov9282_set_ctrl_hflip(struct ov9282 *ov9282, int value)
 610 {
 611         u32 current_val;
 612         int ret = ov9282_read_reg(ov9282, OV9282_REG_TIMING_FORMAT_2, 1,
 613                                   &current_val);
 614         if (ret)
 615                 return ret;
 616
 617         if (value)
 618                 current_val |= OV9282_FLIP_BIT;
 619         else
 620                 current_val &= ~OV9282_FLIP_BIT;
 621
 622         return ov9282_write_reg(ov9282, OV9282_REG_TIMING_FORMAT_2, 1,
 623                                 current_val);
 624 }
 625
 626 static int ov9282_set_ctrl_vflip(struct ov9282 *ov9282, int value)
 627 {
 628         u32 current_val;
 629         int ret = ov9282_read_reg(ov9282, OV9282_REG_TIMING_FORMAT_1, 1,
 630                                   &current_val);
 631         if (ret)
 632                 return ret;
 633
 634         if (value)
 635                 current_val |= OV9282_FLIP_BIT;
 636         else
 637                 current_val &= ~OV9282_FLIP_BIT;
 638
 639         return ov9282_write_reg(ov9282, OV9282_REG_TIMING_FORMAT_1, 1,
 640                                 current_val);
 641 }
 642
 643 /**
 644  * ov9282_set_ctrl() - Set subdevice control
 645  * @ctrl: pointer to v4l2_ctrl structure
 646  *
 647  * Supported controls:
 648  * - V4L2_CID_VBLANK
 649  * - cluster controls:
 650  *   - V4L2_CID_ANALOGUE_GAIN
 651  *   - V4L2_CID_EXPOSURE
 652  *
 653  * Return: 0 if successful, error code otherwise.
 654  */
 655 static int ov9282_set_ctrl(struct v4l2_ctrl *ctrl)
 656 {
 657         struct ov9282 *ov9282 =
 658                 container_of(ctrl->handler, struct ov9282, ctrl_handler);
 659         u32 analog_gain;
 660         u32 exposure;
 661         u32 lpfr;
 662         int ret;
 663
 664         switch (ctrl->id) {
 665         case V4L2_CID_VBLANK:
 666                 ov9282->vblank = ov9282->vblank_ctrl->val;
 667
 668                 dev_dbg(ov9282->dev, "Received vblank %u, new lpfr %u",
 669                         ov9282->vblank,
 670                         ov9282->vblank + ov9282->cur_mode->height);
 671
 672                 ret = __v4l2_ctrl_modify_range(ov9282->exp_ctrl,
 673                                                OV9282_EXPOSURE_MIN,
 674                                                ov9282->vblank +
 675                                                ov9282->cur_mode->height -
 676                                                OV9282_EXPOSURE_OFFSET,
 677                                                1, OV9282_EXPOSURE_DEFAULT);
 678                 break;
 679         }
 680
 681         /* Set controls only if sensor is in power on state */
 682         if (!pm_runtime_get_if_in_use(ov9282->dev))
 683                 return 0;
 684
 685         switch (ctrl->id) {
 686         case V4L2_CID_EXPOSURE:
 687                 exposure = ctrl->val;
 688                 analog_gain = ov9282->again_ctrl->val;
 689
 690                 dev_dbg(ov9282->dev, "Received exp %u, analog gain %u",
 691                         exposure, analog_gain);
 692
 693                 ret = ov9282_update_exp_gain(ov9282, exposure, analog_gain);
 694                 break;
 695         case V4L2_CID_VBLANK:
 696                 lpfr = ov9282->vblank + ov9282->cur_mode->height;
 697                 ret = ov9282_write_reg(ov9282, OV9282_REG_LPFR, 2, lpfr);
 698                 break;
 699         case V4L2_CID_HFLIP:
 700                 ret = ov9282_set_ctrl_hflip(ov9282, ctrl->val);
 701                 break;
 702         case V4L2_CID_VFLIP:
 703                 ret = ov9282_set_ctrl_vflip(ov9282, ctrl->val);
 704                 break;
 705         case V4L2_CID_HBLANK:
 706                 ret = ov9282_write_reg(ov9282, OV9282_REG_TIMING_HTS, 2,
 707                                        (ctrl->val + ov9282->cur_mode->width) >> 1);
 708                 break;
 709         default:
 710                 dev_err(ov9282->dev, "Invalid control %d", ctrl->id);
 711                 ret = -EINVAL;
 712         }
 713
 714         pm_runtime_put(ov9282->dev);
 715
 716         return ret;
 717 }
 718
 719 /* V4l2 subdevice control ops*/
 720 static const struct v4l2_ctrl_ops ov9282_ctrl_ops = {
 721         .s_ctrl = ov9282_set_ctrl,
 722 };
 723
 724 /**
 725  * ov9282_enum_mbus_code() - Enumerate V4L2 sub-device mbus codes
 726  * @sd: pointer to ov9282 V4L2 sub-device structure
 727  * @sd_state: V4L2 sub-device configuration
 728  * @code: V4L2 sub-device code enumeration need to be filled
 729  *
 730  * Return: 0 if successful, error code otherwise.
 731  */
 732 static int ov9282_enum_mbus_code(struct v4l2_subdev *sd,
 733                                  struct v4l2_subdev_state *sd_state,
 734                                  struct v4l2_subdev_mbus_code_enum *code)
 735 {
 736         switch (code->index) {
 737         case 0:
 738                 code->code = MEDIA_BUS_FMT_Y10_1X10;
 739                 break;
 740         case 1:
 741                 code->code = MEDIA_BUS_FMT_Y8_1X8;
 742                 break;
 743         default:
 744                 return -EINVAL;
 745         }
 746
 747         return 0;
 748 }
 749
 750 /**
 751  * ov9282_enum_frame_size() - Enumerate V4L2 sub-device frame sizes
 752  * @sd: pointer to ov9282 V4L2 sub-device structure
 753  * @sd_state: V4L2 sub-device configuration
 754  * @fsize: V4L2 sub-device size enumeration need to be filled
 755  *
 756  * Return: 0 if successful, error code otherwise.
 757  */
 758 static int ov9282_enum_frame_size(struct v4l2_subdev *sd,
 759                                   struct v4l2_subdev_state *sd_state,
 760                                   struct v4l2_subdev_frame_size_enum *fsize)
 761 {
 762         if (fsize->index >= ARRAY_SIZE(supported_modes))
 763                 return -EINVAL;
 764
 765         if (fsize->code != MEDIA_BUS_FMT_Y10_1X10 &&
 766             fsize->code != MEDIA_BUS_FMT_Y8_1X8)
 767                 return -EINVAL;
 768
 769         fsize->min_width = supported_modes[fsize->index].width;
 770         fsize->max_width = fsize->min_width;
 771         fsize->min_height = supported_modes[fsize->index].height;
 772         fsize->max_height = fsize->min_height;
 773
 774         return 0;
 775 }
 776
 777 /**
 778  * ov9282_fill_pad_format() - Fill subdevice pad format
 779  *                            from selected sensor mode
 780  * @ov9282: pointer to ov9282 device
 781  * @mode: pointer to ov9282_mode sensor mode
 782  * @code: mbus code to be stored
 783  * @fmt: V4L2 sub-device format need to be filled
 784  */
 785 static void ov9282_fill_pad_format(struct ov9282 *ov9282,
 786                                    const struct ov9282_mode *mode,
 787                                    u32 code,
 788                                    struct v4l2_subdev_format *fmt)
 789 {
 790         fmt->format.width = mode->width;
 791         fmt->format.height = mode->height;
 792         fmt->format.code = code;
 793         fmt->format.field = V4L2_FIELD_NONE;
 794         fmt->format.colorspace = V4L2_COLORSPACE_RAW;
 795         fmt->format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
 796         fmt->format.quantization = V4L2_QUANTIZATION_DEFAULT;
 797         fmt->format.xfer_func = V4L2_XFER_FUNC_NONE;
 798 }
 799
 800 /**
 801  * ov9282_get_pad_format() - Get subdevice pad format
 802  * @sd: pointer to ov9282 V4L2 sub-device structure
 803  * @sd_state: V4L2 sub-device configuration
 804  * @fmt: V4L2 sub-device format need to be set
 805  *
 806  * Return: 0 if successful, error code otherwise.
 807  */
 808 static int ov9282_get_pad_format(struct v4l2_subdev *sd,
 809                                  struct v4l2_subdev_state *sd_state,
 810                                  struct v4l2_subdev_format *fmt)
 811 {
 812         struct ov9282 *ov9282 = to_ov9282(sd);
 813
 814         mutex_lock(&ov9282->mutex);
 815
 816         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 817                 struct v4l2_mbus_framefmt *framefmt;
 818
 819                 framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
 820                 fmt->format = *framefmt;
 821         } else {
 822                 ov9282_fill_pad_format(ov9282, ov9282->cur_mode, ov9282->code,
 823                                        fmt);
 824         }
 825
 826         mutex_unlock(&ov9282->mutex);
 827
 828         return 0;
 829 }
 830
 831 /**
 832  * ov9282_set_pad_format() - Set subdevice pad format
 833  * @sd: pointer to ov9282 V4L2 sub-device structure
 834  * @sd_state: V4L2 sub-device configuration
 835  * @fmt: V4L2 sub-device format need to be set
 836  *
 837  * Return: 0 if successful, error code otherwise.
 838  */
 839 static int ov9282_set_pad_format(struct v4l2_subdev *sd,
 840                                  struct v4l2_subdev_state *sd_state,
 841                                  struct v4l2_subdev_format *fmt)
 842 {
 843         struct ov9282 *ov9282 = to_ov9282(sd);
 844         const struct ov9282_mode *mode;
 845         u32 code;
 846         int ret = 0;
 847
 848         mutex_lock(&ov9282->mutex);
 849
 850         mode = v4l2_find_nearest_size(supported_modes,
 851                                       ARRAY_SIZE(supported_modes),
 852                                       width, height,
 853                                       fmt->format.width,
 854                                       fmt->format.height);
 855         if (fmt->format.code == MEDIA_BUS_FMT_Y8_1X8)
 856                 code = MEDIA_BUS_FMT_Y8_1X8;
 857         else
 858                 code = MEDIA_BUS_FMT_Y10_1X10;
 859
 860         ov9282_fill_pad_format(ov9282, mode, code, fmt);
 861
 862         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 863                 struct v4l2_mbus_framefmt *framefmt;
 864
 865                 framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
 866                 *framefmt = fmt->format;
 867         } else {
 868                 ret = ov9282_update_controls(ov9282, mode, fmt);
 869                 if (!ret) {
 870                         ov9282->cur_mode = mode;
 871                         ov9282->code = code;
 872                 }
 873         }
 874
 875         mutex_unlock(&ov9282->mutex);
 876
 877         return ret;
 878 }
 879
 880 /**
 881  * ov9282_init_pad_cfg() - Initialize sub-device pad configuration
 882  * @sd: pointer to ov9282 V4L2 sub-device structure
 883  * @sd_state: V4L2 sub-device configuration
 884  *
 885  * Return: 0 if successful, error code otherwise.
 886  */
 887 static int ov9282_init_pad_cfg(struct v4l2_subdev *sd,
 888                                struct v4l2_subdev_state *sd_state)
 889 {
 890         struct ov9282 *ov9282 = to_ov9282(sd);
 891         struct v4l2_subdev_format fmt = { 0 };
 892
 893         fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 894         ov9282_fill_pad_format(ov9282, &supported_modes[DEFAULT_MODE],
 895                                ov9282->code, &fmt);
 896
 897         return ov9282_set_pad_format(sd, sd_state, &fmt);
 898 }
 899
 900 static const struct v4l2_rect *
 901 __ov9282_get_pad_crop(struct ov9282 *ov9282,
 902                       struct v4l2_subdev_state *sd_state,
 903                       unsigned int pad, enum v4l2_subdev_format_whence which)
 904 {
 905         switch (which) {
 906         case V4L2_SUBDEV_FORMAT_TRY:
 907                 return v4l2_subdev_get_try_crop(&ov9282->sd, sd_state, pad);
 908         case V4L2_SUBDEV_FORMAT_ACTIVE:
 909                 return &ov9282->cur_mode->crop;
 910         }
 911
 912         return NULL;
 913 }
 914
 915 static int ov9282_get_selection(struct v4l2_subdev *sd,
 916                                 struct v4l2_subdev_state *sd_state,
 917                                 struct v4l2_subdev_selection *sel)
 918 {
 919         switch (sel->target) {
 920         case V4L2_SEL_TGT_CROP: {
 921                 struct ov9282 *ov9282 = to_ov9282(sd);
 922
 923                 mutex_lock(&ov9282->mutex);
 924                 sel->r = *__ov9282_get_pad_crop(ov9282, sd_state, sel->pad,
 925                                                 sel->which);
 926                 mutex_unlock(&ov9282->mutex);
 927
 928                 return 0;
 929         }
 930
 931         case V4L2_SEL_TGT_NATIVE_SIZE:
 932                 sel->r.top = 0;
 933                 sel->r.left = 0;
 934                 sel->r.width = OV9282_NATIVE_WIDTH;
 935                 sel->r.height = OV9282_NATIVE_HEIGHT;
 936
 937                 return 0;
 938
 939         case V4L2_SEL_TGT_CROP_DEFAULT:
 940         case V4L2_SEL_TGT_CROP_BOUNDS:
 941                 sel->r.top = OV9282_PIXEL_ARRAY_TOP;
 942                 sel->r.left = OV9282_PIXEL_ARRAY_LEFT;
 943                 sel->r.width = OV9282_PIXEL_ARRAY_WIDTH;
 944                 sel->r.height = OV9282_PIXEL_ARRAY_HEIGHT;
 945
 946                 return 0;
 947         }
 948
 949         return -EINVAL;
 950 }
 951
 952 /**
 953  * ov9282_start_streaming() - Start sensor stream
 954  * @ov9282: pointer to ov9282 device
 955  *
 956  * Return: 0 if successful, error code otherwise.
 957  */
 958 static int ov9282_start_streaming(struct ov9282 *ov9282)
 959 {
 960         const struct ov9282_reg bitdepth_regs[2][2] = {
 961                 {
 962                         {OV9282_REG_PLL_CTRL_0D, OV9282_PLL_CTRL_0D_RAW10},
 963                         {OV9282_REG_ANA_CORE_2, OV9282_ANA_CORE2_RAW10},
 964                 }, {
 965                         {OV9282_REG_PLL_CTRL_0D, OV9282_PLL_CTRL_0D_RAW8},
 966                         {OV9282_REG_ANA_CORE_2, OV9282_ANA_CORE2_RAW8},
 967                 }
 968         };
 969         const struct ov9282_reg_list *reg_list;
 970         int bitdepth_index;
 971         int ret;
 972
 973         /* Write common registers */
 974         ret = ov9282_write_regs(ov9282, common_regs_list.regs,
 975                                 common_regs_list.num_of_regs);
 976         if (ret) {
 977                 dev_err(ov9282->dev, "fail to write common registers");
 978                 return ret;
 979         }
 980
 981         bitdepth_index = ov9282->code == MEDIA_BUS_FMT_Y10_1X10 ? 0 : 1;
 982         ret = ov9282_write_regs(ov9282, bitdepth_regs[bitdepth_index], 2);
 983         if (ret) {
 984                 dev_err(ov9282->dev, "fail to write bitdepth regs");
 985                 return ret;
 986         }
 987
 988         /* Write sensor mode registers */
 989         reg_list = &ov9282->cur_mode->reg_list;
 990         ret = ov9282_write_regs(ov9282, reg_list->regs, reg_list->num_of_regs);
 991         if (ret) {
 992                 dev_err(ov9282->dev, "fail to write initial registers");
 993                 return ret;
 994         }
 995
 996         /* Setup handler will write actual exposure and gain */
 997         ret =  __v4l2_ctrl_handler_setup(ov9282->sd.ctrl_handler);
 998         if (ret) {
 999                 dev_err(ov9282->dev, "fail to setup handler");
1000                 return ret;
1001         }
1002
1003         /* Start streaming */
1004         ret = ov9282_write_reg(ov9282, OV9282_REG_MODE_SELECT,
1005                                1, OV9282_MODE_STREAMING);
1006         if (ret) {
1007                 dev_err(ov9282->dev, "fail to start streaming");
1008                 return ret;
1009         }
1010
1011         return 0;
1012 }
1013
1014 /**
1015  * ov9282_stop_streaming() - Stop sensor stream
1016  * @ov9282: pointer to ov9282 device
1017  *
1018  * Return: 0 if successful, error code otherwise.
1019  */
1020 static int ov9282_stop_streaming(struct ov9282 *ov9282)
1021 {
1022         return ov9282_write_reg(ov9282, OV9282_REG_MODE_SELECT,
1023                                 1, OV9282_MODE_STANDBY);
1024 }
1025
1026 /**
1027  * ov9282_set_stream() - Enable sensor streaming
1028  * @sd: pointer to ov9282 subdevice
1029  * @enable: set to enable sensor streaming
1030  *
1031  * Return: 0 if successful, error code otherwise.
1032  */
1033 static int ov9282_set_stream(struct v4l2_subdev *sd, int enable)
1034 {
1035         struct ov9282 *ov9282 = to_ov9282(sd);
1036         int ret;
1037
1038         mutex_lock(&ov9282->mutex);
1039
1040         if (ov9282->streaming == enable) {
1041                 mutex_unlock(&ov9282->mutex);
1042                 return 0;
1043         }
1044
1045         if (enable) {
1046                 ret = pm_runtime_resume_and_get(ov9282->dev);
1047                 if (ret)
1048                         goto error_unlock;
1049
1050                 ret = ov9282_start_streaming(ov9282);
1051                 if (ret)
1052                         goto error_power_off;
1053         } else {
1054                 ov9282_stop_streaming(ov9282);
1055                 pm_runtime_put(ov9282->dev);
1056         }
1057
1058         ov9282->streaming = enable;
1059
1060         mutex_unlock(&ov9282->mutex);
1061
1062         return 0;
1063
1064 error_power_off:
1065         pm_runtime_put(ov9282->dev);
1066 error_unlock:
1067         mutex_unlock(&ov9282->mutex);
1068
1069         return ret;
1070 }
1071
1072 /**
1073  * ov9282_detect() - Detect ov9282 sensor
1074  * @ov9282: pointer to ov9282 device
1075  *
1076  * Return: 0 if successful, -EIO if sensor id does not match
1077  */
1078 static int ov9282_detect(struct ov9282 *ov9282)
1079 {
1080         int ret;
1081         u32 val, msb;
1082
1083         ret = ov9282_read_reg(ov9282, OV9282_REG_ID + 1, 1, &val);
1084         if (ret)
1085                 return ret;
1086         ret = ov9282_read_reg(ov9282, OV9282_REG_ID, 1, &msb);
1087         if (ret)
1088                 return ret;
1089
1090         val |= (msb << 8);
1091         if (val != OV9282_ID) {
1092                 dev_err(ov9282->dev, "chip id mismatch: %x!=%x",
1093                         OV9282_ID, val);
1094                 return -ENXIO;
1095         }
1096
1097         return 0;
1098 }
1099
1100 static int ov9282_configure_regulators(struct ov9282 *ov9282)
1101 {
1102         unsigned int i;
1103
1104         for (i = 0; i < OV9282_NUM_SUPPLIES; i++)
1105                 ov9282->supplies[i].supply = ov9282_supply_names[i];
1106
1107         return devm_regulator_bulk_get(ov9282->dev,
1108                                        OV9282_NUM_SUPPLIES,
1109                                        ov9282->supplies);
1110 }
1111
1112 /**
1113  * ov9282_parse_hw_config() - Parse HW configuration and check if supported
1114  * @ov9282: pointer to ov9282 device
1115  *
1116  * Return: 0 if successful, error code otherwise.
1117  */
1118 static int ov9282_parse_hw_config(struct ov9282 *ov9282)
1119 {
1120         struct fwnode_handle *fwnode = dev_fwnode(ov9282->dev);
1121         struct v4l2_fwnode_endpoint bus_cfg = {
1122                 .bus_type = V4L2_MBUS_CSI2_DPHY
1123         };
1124         struct fwnode_handle *ep;
1125         unsigned long rate;
1126         unsigned int i;
1127         int ret;
1128
1129         if (!fwnode)
1130                 return -ENXIO;
1131
1132         /* Request optional reset pin */
1133         ov9282->reset_gpio = devm_gpiod_get_optional(ov9282->dev, "reset",
1134                                                      GPIOD_OUT_LOW);
1135         if (IS_ERR(ov9282->reset_gpio)) {
1136                 dev_err(ov9282->dev, "failed to get reset gpio %ld",
1137                         PTR_ERR(ov9282->reset_gpio));
1138                 return PTR_ERR(ov9282->reset_gpio);
1139         }
1140
1141         /* Get sensor input clock */
1142         ov9282->inclk = devm_clk_get(ov9282->dev, NULL);
1143         if (IS_ERR(ov9282->inclk)) {
1144                 dev_err(ov9282->dev, "could not get inclk");
1145                 return PTR_ERR(ov9282->inclk);
1146         }
1147
1148         ret = ov9282_configure_regulators(ov9282);
1149         if (ret)
1150                 return dev_err_probe(ov9282->dev, ret,
1151                                      "Failed to get power regulators\n");
1152
1153         rate = clk_get_rate(ov9282->inclk);
1154         if (rate != OV9282_INCLK_RATE) {
1155                 dev_err(ov9282->dev, "inclk frequency mismatch");
1156                 return -EINVAL;
1157         }
1158
1159         ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
1160         if (!ep)
1161                 return -ENXIO;
1162
1163         ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
1164         fwnode_handle_put(ep);
1165         if (ret)
1166                 return ret;
1167
1168         ov9282->noncontinuous_clock =
1169                 bus_cfg.bus.mipi_csi2.flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
1170
1171         if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV9282_NUM_DATA_LANES) {
1172                 dev_err(ov9282->dev,
1173                         "number of CSI2 data lanes %d is not supported",
1174                         bus_cfg.bus.mipi_csi2.num_data_lanes);
1175                 ret = -EINVAL;
1176                 goto done_endpoint_free;
1177         }
1178
1179         if (!bus_cfg.nr_of_link_frequencies) {
1180                 dev_err(ov9282->dev, "no link frequencies defined");
1181                 ret = -EINVAL;
1182                 goto done_endpoint_free;
1183         }
1184
1185         for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
1186                 if (bus_cfg.link_frequencies[i] == OV9282_LINK_FREQ)
1187                         goto done_endpoint_free;
1188
1189         ret = -EINVAL;
1190
1191 done_endpoint_free:
1192         v4l2_fwnode_endpoint_free(&bus_cfg);
1193
1194         return ret;
1195 }
1196
1197 /* V4l2 subdevice ops */
1198 static const struct v4l2_subdev_core_ops ov9282_core_ops = {
1199         .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
1200         .unsubscribe_event = v4l2_event_subdev_unsubscribe,
1201 };
1202
1203 static const struct v4l2_subdev_video_ops ov9282_video_ops = {
1204         .s_stream = ov9282_set_stream,
1205 };
1206
1207 static const struct v4l2_subdev_pad_ops ov9282_pad_ops = {
1208         .init_cfg = ov9282_init_pad_cfg,
1209         .enum_mbus_code = ov9282_enum_mbus_code,
1210         .enum_frame_size = ov9282_enum_frame_size,
1211         .get_fmt = ov9282_get_pad_format,
1212         .set_fmt = ov9282_set_pad_format,
1213         .get_selection = ov9282_get_selection,
1214 };
1215
1216 static const struct v4l2_subdev_ops ov9282_subdev_ops = {
1217         .core = &ov9282_core_ops,
1218         .video = &ov9282_video_ops,
1219         .pad = &ov9282_pad_ops,
1220 };
1221
1222 /**
1223  * ov9282_power_on() - Sensor power on sequence
1224  * @dev: pointer to i2c device
1225  *
1226  * Return: 0 if successful, error code otherwise.
1227  */
1228 static int ov9282_power_on(struct device *dev)
1229 {
1230         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1231         struct ov9282 *ov9282 = to_ov9282(sd);
1232         int ret;
1233
1234         ret = regulator_bulk_enable(OV9282_NUM_SUPPLIES, ov9282->supplies);
1235         if (ret < 0) {
1236                 dev_err(dev, "Failed to enable regulators\n");
1237                 return ret;
1238         }
1239
1240         usleep_range(400, 600);
1241
1242         gpiod_set_value_cansleep(ov9282->reset_gpio, 1);
1243
1244         ret = clk_prepare_enable(ov9282->inclk);
1245         if (ret) {
1246                 dev_err(ov9282->dev, "fail to enable inclk");
1247                 goto error_reset;
1248         }
1249
1250         usleep_range(400, 600);
1251
1252         ret = ov9282_write_reg(ov9282, OV9282_REG_MIPI_CTRL00, 1,
1253                                ov9282->noncontinuous_clock ?
1254                                         OV9282_GATED_CLOCK : 0);
1255         if (ret) {
1256                 dev_err(ov9282->dev, "fail to write MIPI_CTRL00");
1257                 goto error_clk;
1258         }
1259
1260         return 0;
1261
1262 error_clk:
1263         clk_disable_unprepare(ov9282->inclk);
1264 error_reset:
1265         gpiod_set_value_cansleep(ov9282->reset_gpio, 0);
1266
1267         regulator_bulk_disable(OV9282_NUM_SUPPLIES, ov9282->supplies);
1268
1269         return ret;
1270 }
1271
1272 /**
1273  * ov9282_power_off() - Sensor power off sequence
1274  * @dev: pointer to i2c device
1275  *
1276  * Return: 0 if successful, error code otherwise.
1277  */
1278 static int ov9282_power_off(struct device *dev)
1279 {
1280         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1281         struct ov9282 *ov9282 = to_ov9282(sd);
1282
1283         gpiod_set_value_cansleep(ov9282->reset_gpio, 0);
1284
1285         clk_disable_unprepare(ov9282->inclk);
1286
1287         regulator_bulk_disable(OV9282_NUM_SUPPLIES, ov9282->supplies);
1288
1289         return 0;
1290 }
1291
1292 /**
1293  * ov9282_init_controls() - Initialize sensor subdevice controls
1294  * @ov9282: pointer to ov9282 device
1295  *
1296  * Return: 0 if successful, error code otherwise.
1297  */
1298 static int ov9282_init_controls(struct ov9282 *ov9282)
1299 {
1300         struct v4l2_ctrl_handler *ctrl_hdlr = &ov9282->ctrl_handler;
1301         const struct ov9282_mode *mode = ov9282->cur_mode;
1302         struct v4l2_fwnode_device_properties props;
1303         u32 hblank_min;
1304         u32 lpfr;
1305         int ret;
1306
1307         ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
1308         if (ret)
1309                 return ret;
1310
1311         /* Serialize controls with sensor device */
1312         ctrl_hdlr->lock = &ov9282->mutex;
1313
1314         /* Initialize exposure and gain */
1315         lpfr = mode->vblank + mode->height;
1316         ov9282->exp_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1317                                              &ov9282_ctrl_ops,
1318                                              V4L2_CID_EXPOSURE,
1319                                              OV9282_EXPOSURE_MIN,
1320                                              lpfr - OV9282_EXPOSURE_OFFSET,
1321                                              OV9282_EXPOSURE_STEP,
1322                                              OV9282_EXPOSURE_DEFAULT);
1323
1324         ov9282->again_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1325                                                &ov9282_ctrl_ops,
1326                                                V4L2_CID_ANALOGUE_GAIN,
1327                                                OV9282_AGAIN_MIN,
1328                                                OV9282_AGAIN_MAX,
1329                                                OV9282_AGAIN_STEP,
1330                                                OV9282_AGAIN_DEFAULT);
1331
1332         v4l2_ctrl_cluster(2, &ov9282->exp_ctrl);
1333
1334         ov9282->vblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1335                                                 &ov9282_ctrl_ops,
1336                                                 V4L2_CID_VBLANK,
1337                                                 mode->vblank_min,
1338                                                 mode->vblank_max,
1339                                                 1, mode->vblank);
1340
1341         v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_VFLIP,
1342                           0, 1, 1, 1);
1343
1344         v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_HFLIP,
1345                           0, 1, 1, 1);
1346
1347         /* Read only controls */
1348         ov9282->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops,
1349                                                V4L2_CID_PIXEL_RATE,
1350                                                OV9282_PIXEL_RATE_10BIT,
1351                                                OV9282_PIXEL_RATE_10BIT, 1,
1352                                                OV9282_PIXEL_RATE_10BIT);
1353
1354         ov9282->link_freq_ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr,
1355                                                         &ov9282_ctrl_ops,
1356                                                         V4L2_CID_LINK_FREQ,
1357                                                         ARRAY_SIZE(link_freq) -
1358                                                         1,
1359                                                         mode->link_freq_idx,
1360                                                         link_freq);
1361         if (ov9282->link_freq_ctrl)
1362                 ov9282->link_freq_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1363
1364         hblank_min = mode->hblank_min[ov9282->noncontinuous_clock ? 0 : 1];
1365         ov9282->hblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1366                                                 &ov9282_ctrl_ops,
1367                                                 V4L2_CID_HBLANK,
1368                                                 hblank_min,
1369                                                 OV9282_TIMING_HTS_MAX - mode->width,
1370                                                 1, hblank_min);
1371
1372         ret = v4l2_fwnode_device_parse(ov9282->dev, &props);
1373         if (!ret) {
1374                 /* Failure sets ctrl_hdlr->error, which we check afterwards anyway */
1375                 v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &ov9282_ctrl_ops,
1376                                                 &props);
1377         }
1378
1379         if (ctrl_hdlr->error || ret) {
1380                 dev_err(ov9282->dev, "control init failed: %d",
1381                         ctrl_hdlr->error);
1382                 v4l2_ctrl_handler_free(ctrl_hdlr);
1383                 return ctrl_hdlr->error;
1384         }
1385
1386         ov9282->sd.ctrl_handler = ctrl_hdlr;
1387
1388         return 0;
1389 }
1390
1391 /**
1392  * ov9282_probe() - I2C client device binding
1393  * @client: pointer to i2c client device
1394  *
1395  * Return: 0 if successful, error code otherwise.
1396  */
1397 static int ov9282_probe(struct i2c_client *client)
1398 {
1399         struct ov9282 *ov9282;
1400         int ret;
1401
1402         ov9282 = devm_kzalloc(&client->dev, sizeof(*ov9282), GFP_KERNEL);
1403         if (!ov9282)
1404                 return -ENOMEM;
1405
1406         ov9282->dev = &client->dev;
1407
1408         /* Initialize subdev */
1409         v4l2_i2c_subdev_init(&ov9282->sd, client, &ov9282_subdev_ops);
1410         v4l2_i2c_subdev_set_name(&ov9282->sd, client,
1411                                  device_get_match_data(ov9282->dev), NULL);
1412
1413         ret = ov9282_parse_hw_config(ov9282);
1414         if (ret) {
1415                 dev_err(ov9282->dev, "HW configuration is not supported");
1416                 return ret;
1417         }
1418
1419         mutex_init(&ov9282->mutex);
1420
1421         ret = ov9282_power_on(ov9282->dev);
1422         if (ret) {
1423                 dev_err(ov9282->dev, "failed to power-on the sensor");
1424                 goto error_mutex_destroy;
1425         }
1426
1427         /* Check module identity */
1428         ret = ov9282_detect(ov9282);
1429         if (ret) {
1430                 dev_err(ov9282->dev, "failed to find sensor: %d", ret);
1431                 goto error_power_off;
1432         }
1433
1434         /* Set default mode to first mode */
1435         ov9282->cur_mode = &supported_modes[DEFAULT_MODE];
1436         ov9282->code = MEDIA_BUS_FMT_Y10_1X10;
1437         ov9282->vblank = ov9282->cur_mode->vblank;
1438
1439         ret = ov9282_init_controls(ov9282);
1440         if (ret) {
1441                 dev_err(ov9282->dev, "failed to init controls: %d", ret);
1442                 goto error_power_off;
1443         }
1444
1445         /* Initialize subdev */
1446         ov9282->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
1447                             V4L2_SUBDEV_FL_HAS_EVENTS;
1448         ov9282->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1449
1450         /* Initialize source pad */
1451         ov9282->pad.flags = MEDIA_PAD_FL_SOURCE;
1452         ret = media_entity_pads_init(&ov9282->sd.entity, 1, &ov9282->pad);
1453         if (ret) {
1454                 dev_err(ov9282->dev, "failed to init entity pads: %d", ret);
1455                 goto error_handler_free;
1456         }
1457
1458         ret = v4l2_async_register_subdev_sensor(&ov9282->sd);
1459         if (ret < 0) {
1460                 dev_err(ov9282->dev,
1461                         "failed to register async subdev: %d", ret);
1462                 goto error_media_entity;
1463         }
1464
1465         pm_runtime_set_active(ov9282->dev);
1466         pm_runtime_enable(ov9282->dev);
1467         pm_runtime_idle(ov9282->dev);
1468
1469         return 0;
1470
1471 error_media_entity:
1472         media_entity_cleanup(&ov9282->sd.entity);
1473 error_handler_free:
1474         v4l2_ctrl_handler_free(ov9282->sd.ctrl_handler);
1475 error_power_off:
1476         ov9282_power_off(ov9282->dev);
1477 error_mutex_destroy:
1478         mutex_destroy(&ov9282->mutex);
1479
1480         return ret;
1481 }
1482
1483 /**
1484  * ov9282_remove() - I2C client device unbinding
1485  * @client: pointer to I2C client device
1486  *
1487  * Return: 0 if successful, error code otherwise.
1488  */
1489 static void ov9282_remove(struct i2c_client *client)
1490 {
1491         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1492         struct ov9282 *ov9282 = to_ov9282(sd);
1493
1494         v4l2_async_unregister_subdev(sd);
1495         media_entity_cleanup(&sd->entity);
1496         v4l2_ctrl_handler_free(sd->ctrl_handler);
1497
1498         pm_runtime_disable(&client->dev);
1499         if (!pm_runtime_status_suspended(&client->dev))
1500                 ov9282_power_off(&client->dev);
1501         pm_runtime_set_suspended(&client->dev);
1502
1503         mutex_destroy(&ov9282->mutex);
1504 }
1505
1506 static const struct dev_pm_ops ov9282_pm_ops = {
1507         SET_RUNTIME_PM_OPS(ov9282_power_off, ov9282_power_on, NULL)
1508 };
1509
1510 static const struct of_device_id ov9282_of_match[] = {
1511         { .compatible = "ovti,ov9281", .data = "ov9281" },
1512         { .compatible = "ovti,ov9282", .data = "ov9282" },
1513         { }
1514 };
1515
1516 MODULE_DEVICE_TABLE(of, ov9282_of_match);
1517
1518 static struct i2c_driver ov9282_driver = {
1519         .probe = ov9282_probe,
1520         .remove = ov9282_remove,
1521         .driver = {
1522                 .name = "ov9282",
1523                 .pm = &ov9282_pm_ops,
1524                 .of_match_table = ov9282_of_match,
1525         },
1526 };
1527
1528 module_i2c_driver(ov9282_driver);
1529
1530 MODULE_DESCRIPTION("OmniVision ov9282 sensor driver");
1531 MODULE_LICENSE("GPL");