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  */
 169 struct ov9282 {
 170         struct device *dev;
 171         struct v4l2_subdev sd;
 172         struct media_pad pad;
 173         struct gpio_desc *reset_gpio;
 174         struct clk *inclk;
 175         struct regulator_bulk_data supplies[OV9282_NUM_SUPPLIES];
 176         struct v4l2_ctrl_handler ctrl_handler;
 177         struct v4l2_ctrl *link_freq_ctrl;
 178         struct v4l2_ctrl *hblank_ctrl;
 179         struct v4l2_ctrl *vblank_ctrl;
 180         struct {
 181                 struct v4l2_ctrl *exp_ctrl;
 182                 struct v4l2_ctrl *again_ctrl;
 183         };
 184         struct v4l2_ctrl *pixel_rate;
 185         u32 vblank;
 186         bool noncontinuous_clock;
 187         const struct ov9282_mode *cur_mode;
 188         u32 code;
 189         struct mutex mutex;
 190 };
 191
 192 static const s64 link_freq[] = {
 193         OV9282_LINK_FREQ,
 194 };
 195
 196 /*
 197  * Common registers
 198  *
 199  * Note: Do NOT include a software reset (0x0103, 0x01) in any of these
 200  * register arrays as some settings are written as part of ov9282_power_on,
 201  * and the reset will clear them.
 202  */
 203 static const struct ov9282_reg common_regs[] = {
 204         {0x0302, 0x32},
 205         {0x030e, 0x02},
 206         {0x3001, 0x00},
 207         {0x3004, 0x00},
 208         {0x3005, 0x00},
 209         {0x3006, 0x04},
 210         {0x3011, 0x0a},
 211         {0x3013, 0x18},
 212         {0x301c, 0xf0},
 213         {0x3022, 0x01},
 214         {0x3030, 0x10},
 215         {0x3039, 0x32},
 216         {0x303a, 0x00},
 217         {0x3503, 0x08},
 218         {0x3505, 0x8c},
 219         {0x3507, 0x03},
 220         {0x3508, 0x00},
 221         {0x3610, 0x80},
 222         {0x3611, 0xa0},
 223         {0x3620, 0x6e},
 224         {0x3632, 0x56},
 225         {0x3633, 0x78},
 226         {0x3666, 0x00},
 227         {0x366f, 0x5a},
 228         {0x3680, 0x84},
 229         {0x3712, 0x80},
 230         {0x372d, 0x22},
 231         {0x3731, 0x80},
 232         {0x3732, 0x30},
 233         {0x377d, 0x22},
 234         {0x3788, 0x02},
 235         {0x3789, 0xa4},
 236         {0x378a, 0x00},
 237         {0x378b, 0x4a},
 238         {0x3799, 0x20},
 239         {0x3881, 0x42},
 240         {0x38a8, 0x02},
 241         {0x38a9, 0x80},
 242         {0x38b1, 0x00},
 243         {0x38c4, 0x00},
 244         {0x38c5, 0xc0},
 245         {0x38c6, 0x04},
 246         {0x38c7, 0x80},
 247         {0x3920, 0xff},
 248         {0x4010, 0x40},
 249         {0x4043, 0x40},
 250         {0x4307, 0x30},
 251         {0x4317, 0x00},
 252         {0x4501, 0x00},
 253         {0x450a, 0x08},
 254         {0x4601, 0x04},
 255         {0x470f, 0x00},
 256         {0x4f07, 0x00},
 257         {0x5000, 0x9f},
 258         {0x5001, 0x00},
 259         {0x5e00, 0x00},
 260         {0x5d00, 0x07},
 261         {0x5d01, 0x00},
 262         {0x0101, 0x01},
 263         {0x1000, 0x03},
 264         {0x5a08, 0x84},
 265 };
 266
 267 static struct ov9282_reg_list common_regs_list = {
 268         .num_of_regs = ARRAY_SIZE(common_regs),
 269         .regs = common_regs,
 270 };
 271
 272 #define MODE_1280_800           0
 273 #define MODE_1280_720           1
 274 #define MODE_640_400            2
 275
 276 #define DEFAULT_MODE            MODE_1280_720
 277
 278 /* Sensor mode registers */
 279 static const struct ov9282_reg mode_1280x800_regs[] = {
 280         {0x3778, 0x00},
 281         {0x3800, 0x00},
 282         {0x3801, 0x00},
 283         {0x3802, 0x00},
 284         {0x3803, 0x00},
 285         {0x3804, 0x05},
 286         {0x3805, 0x0f},
 287         {0x3806, 0x03},
 288         {0x3807, 0x2f},
 289         {0x3808, 0x05},
 290         {0x3809, 0x00},
 291         {0x380a, 0x03},
 292         {0x380b, 0x20},
 293         {0x3810, 0x00},
 294         {0x3811, 0x08},
 295         {0x3812, 0x00},
 296         {0x3813, 0x08},
 297         {0x3814, 0x11},
 298         {0x3815, 0x11},
 299         {0x3820, 0x40},
 300         {0x3821, 0x00},
 301         {0x4003, 0x40},
 302         {0x4008, 0x04},
 303         {0x4009, 0x0b},
 304         {0x400c, 0x00},
 305         {0x400d, 0x07},
 306         {0x4507, 0x00},
 307         {0x4509, 0x00},
 308 };
 309
 310 static const struct ov9282_reg mode_1280x720_regs[] = {
 311         {0x3778, 0x00},
 312         {0x3800, 0x00},
 313         {0x3801, 0x00},
 314         {0x3802, 0x00},
 315         {0x3803, 0x00},
 316         {0x3804, 0x05},
 317         {0x3805, 0x0f},
 318         {0x3806, 0x02},
 319         {0x3807, 0xdf},
 320         {0x3808, 0x05},
 321         {0x3809, 0x00},
 322         {0x380a, 0x02},
 323         {0x380b, 0xd0},
 324         {0x3810, 0x00},
 325         {0x3811, 0x08},
 326         {0x3812, 0x00},
 327         {0x3813, 0x08},
 328         {0x3814, 0x11},
 329         {0x3815, 0x11},
 330         {0x3820, 0x3c},
 331         {0x3821, 0x84},
 332         {0x4003, 0x40},
 333         {0x4008, 0x02},
 334         {0x4009, 0x05},
 335         {0x400c, 0x00},
 336         {0x400d, 0x03},
 337         {0x4507, 0x00},
 338         {0x4509, 0x80},
 339 };
 340
 341 static const struct ov9282_reg mode_640x400_regs[] = {
 342         {0x3778, 0x10},
 343         {0x3800, 0x00},
 344         {0x3801, 0x00},
 345         {0x3802, 0x00},
 346         {0x3803, 0x00},
 347         {0x3804, 0x05},
 348         {0x3805, 0x0f},
 349         {0x3806, 0x03},
 350         {0x3807, 0x2f},
 351         {0x3808, 0x02},
 352         {0x3809, 0x80},
 353         {0x380a, 0x01},
 354         {0x380b, 0x90},
 355         {0x3810, 0x00},
 356         {0x3811, 0x04},
 357         {0x3812, 0x00},
 358         {0x3813, 0x04},
 359         {0x3814, 0x31},
 360         {0x3815, 0x22},
 361         {0x3820, 0x60},
 362         {0x3821, 0x01},
 363         {0x4008, 0x02},
 364         {0x4009, 0x05},
 365         {0x400c, 0x00},
 366         {0x400d, 0x03},
 367         {0x4507, 0x03},
 368         {0x4509, 0x80},
 369 };
 370
 371 /* Supported sensor mode configurations */
 372 static const struct ov9282_mode supported_modes[] = {
 373         [MODE_1280_800] = {
 374                 .width = 1280,
 375                 .height = 800,
 376                 .hblank_min = { 250, 176 },
 377                 .vblank = 1022,
 378                 .vblank_min = 110,
 379                 .vblank_max = 51540,
 380                 .link_freq_idx = 0,
 381                 .crop = {
 382                         .left = OV9282_PIXEL_ARRAY_LEFT,
 383                         .top = OV9282_PIXEL_ARRAY_TOP,
 384                         .width = 1280,
 385                         .height = 800
 386                 },
 387                 .reg_list = {
 388                         .num_of_regs = ARRAY_SIZE(mode_1280x800_regs),
 389                         .regs = mode_1280x800_regs,
 390                 },
 391         },
 392         [MODE_1280_720] = {
 393                 .width = 1280,
 394                 .height = 720,
 395                 .hblank_min = { 250, 176 },
 396                 .vblank = 1022,
 397                 .vblank_min = 41,
 398                 .vblank_max = 51540,
 399                 .link_freq_idx = 0,
 400                 .crop = {
 401                         /*
 402                          * Note that this mode takes the top 720 lines from the
 403                          * 800 of the sensor. It does not take a middle crop.
 404                          */
 405                         .left = OV9282_PIXEL_ARRAY_LEFT,
 406                         .top = OV9282_PIXEL_ARRAY_TOP,
 407                         .width = 1280,
 408                         .height = 720
 409                 },
 410                 .reg_list = {
 411                         .num_of_regs = ARRAY_SIZE(mode_1280x720_regs),
 412                         .regs = mode_1280x720_regs,
 413                 },
 414         },
 415         [MODE_640_400] = {
 416                 .width = 640,
 417                 .height = 400,
 418                 .hblank_min = { 890, 816 },
 419                 .vblank = 1022,
 420                 .vblank_min = 22,
 421                 .vblank_max = 51540,
 422                 .link_freq_idx = 0,
 423                 .crop = {
 424                         .left = OV9282_PIXEL_ARRAY_LEFT,
 425                         .top = OV9282_PIXEL_ARRAY_TOP,
 426                         .width = 1280,
 427                         .height = 800
 428                 },
 429                 .reg_list = {
 430                         .num_of_regs = ARRAY_SIZE(mode_640x400_regs),
 431                         .regs = mode_640x400_regs,
 432                 },
 433         },
 434 };
 435
 436 /**
 437  * to_ov9282() - ov9282 V4L2 sub-device to ov9282 device.
 438  * @subdev: pointer to ov9282 V4L2 sub-device
 439  *
 440  * Return: pointer to ov9282 device
 441  */
 442 static inline struct ov9282 *to_ov9282(struct v4l2_subdev *subdev)
 443 {
 444         return container_of(subdev, struct ov9282, sd);
 445 }
 446
 447 /**
 448  * ov9282_read_reg() - Read registers.
 449  * @ov9282: pointer to ov9282 device
 450  * @reg: register address
 451  * @len: length of bytes to read. Max supported bytes is 4
 452  * @val: pointer to register value to be filled.
 453  *
 454  * Return: 0 if successful, error code otherwise.
 455  */
 456 static int ov9282_read_reg(struct ov9282 *ov9282, u16 reg, u32 len, u32 *val)
 457 {
 458         struct i2c_client *client = v4l2_get_subdevdata(&ov9282->sd);
 459         struct i2c_msg msgs[2] = {0};
 460         u8 addr_buf[2] = {0};
 461         u8 data_buf[4] = {0};
 462         int ret;
 463
 464         if (WARN_ON(len > 4))
 465                 return -EINVAL;
 466
 467         put_unaligned_be16(reg, addr_buf);
 468
 469         /* Write register address */
 470         msgs[0].addr = client->addr;
 471         msgs[0].flags = 0;
 472         msgs[0].len = ARRAY_SIZE(addr_buf);
 473         msgs[0].buf = addr_buf;
 474
 475         /* Read data from register */
 476         msgs[1].addr = client->addr;
 477         msgs[1].flags = I2C_M_RD;
 478         msgs[1].len = len;
 479         msgs[1].buf = &data_buf[4 - len];
 480
 481         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 482         if (ret != ARRAY_SIZE(msgs))
 483                 return -EIO;
 484
 485         *val = get_unaligned_be32(data_buf);
 486
 487         return 0;
 488 }
 489
 490 /**
 491  * ov9282_write_reg() - Write register
 492  * @ov9282: pointer to ov9282 device
 493  * @reg: register address
 494  * @len: length of bytes. Max supported bytes is 4
 495  * @val: register value
 496  *
 497  * Return: 0 if successful, error code otherwise.
 498  */
 499 static int ov9282_write_reg(struct ov9282 *ov9282, u16 reg, u32 len, u32 val)
 500 {
 501         struct i2c_client *client = v4l2_get_subdevdata(&ov9282->sd);
 502         u8 buf[6] = {0};
 503
 504         if (WARN_ON(len > 4))
 505                 return -EINVAL;
 506
 507         put_unaligned_be16(reg, buf);
 508         put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
 509         if (i2c_master_send(client, buf, len + 2) != len + 2)
 510                 return -EIO;
 511
 512         return 0;
 513 }
 514
 515 /**
 516  * ov9282_write_regs() - Write a list of registers
 517  * @ov9282: pointer to ov9282 device
 518  * @regs: list of registers to be written
 519  * @len: length of registers array
 520  *
 521  * Return: 0 if successful, error code otherwise.
 522  */
 523 static int ov9282_write_regs(struct ov9282 *ov9282,
 524                              const struct ov9282_reg *regs, u32 len)
 525 {
 526         unsigned int i;
 527         int ret;
 528
 529         for (i = 0; i < len; i++) {
 530                 ret = ov9282_write_reg(ov9282, regs[i].address, 1, regs[i].val);
 531                 if (ret)
 532                         return ret;
 533         }
 534
 535         return 0;
 536 }
 537
 538 /**
 539  * ov9282_update_controls() - Update control ranges based on streaming mode
 540  * @ov9282: pointer to ov9282 device
 541  * @mode: pointer to ov9282_mode sensor mode
 542  * @fmt: pointer to the requested mode
 543  *
 544  * Return: 0 if successful, error code otherwise.
 545  */
 546 static int ov9282_update_controls(struct ov9282 *ov9282,
 547                                   const struct ov9282_mode *mode,
 548                                   const struct v4l2_subdev_format *fmt)
 549 {
 550         u32 hblank_min;
 551         s64 pixel_rate;
 552         int ret;
 553
 554         ret = __v4l2_ctrl_s_ctrl(ov9282->link_freq_ctrl, mode->link_freq_idx);
 555         if (ret)
 556                 return ret;
 557
 558         pixel_rate = (fmt->format.code == MEDIA_BUS_FMT_Y10_1X10) ?
 559                 OV9282_PIXEL_RATE_10BIT : OV9282_PIXEL_RATE_8BIT;
 560         ret = __v4l2_ctrl_modify_range(ov9282->pixel_rate, pixel_rate,
 561                                        pixel_rate, 1, pixel_rate);
 562         if (ret)
 563                 return ret;
 564
 565         hblank_min = mode->hblank_min[ov9282->noncontinuous_clock ? 0 : 1];
 566         ret =  __v4l2_ctrl_modify_range(ov9282->hblank_ctrl, hblank_min,
 567                                         OV9282_TIMING_HTS_MAX - mode->width, 1,
 568                                         hblank_min);
 569         if (ret)
 570                 return ret;
 571
 572         return __v4l2_ctrl_modify_range(ov9282->vblank_ctrl, mode->vblank_min,
 573                                         mode->vblank_max, 1, mode->vblank);
 574 }
 575
 576 /**
 577  * ov9282_update_exp_gain() - Set updated exposure and gain
 578  * @ov9282: pointer to ov9282 device
 579  * @exposure: updated exposure value
 580  * @gain: updated analog gain value
 581  *
 582  * Return: 0 if successful, error code otherwise.
 583  */
 584 static int ov9282_update_exp_gain(struct ov9282 *ov9282, u32 exposure, u32 gain)
 585 {
 586         int ret;
 587
 588         dev_dbg(ov9282->dev, "Set exp %u, analog gain %u",
 589                 exposure, gain);
 590
 591         ret = ov9282_write_reg(ov9282, OV9282_REG_HOLD, 1, 1);
 592         if (ret)
 593                 return ret;
 594
 595         ret = ov9282_write_reg(ov9282, OV9282_REG_EXPOSURE, 3, exposure << 4);
 596         if (ret)
 597                 goto error_release_group_hold;
 598
 599         ret = ov9282_write_reg(ov9282, OV9282_REG_AGAIN, 1, gain);
 600
 601 error_release_group_hold:
 602         ov9282_write_reg(ov9282, OV9282_REG_HOLD, 1, 0);
 603
 604         return ret;
 605 }
 606
 607 static int ov9282_set_ctrl_hflip(struct ov9282 *ov9282, int value)
 608 {
 609         u32 current_val;
 610         int ret = ov9282_read_reg(ov9282, OV9282_REG_TIMING_FORMAT_2, 1,
 611                                   &current_val);
 612         if (ret)
 613                 return ret;
 614
 615         if (value)
 616                 current_val |= OV9282_FLIP_BIT;
 617         else
 618                 current_val &= ~OV9282_FLIP_BIT;
 619
 620         return ov9282_write_reg(ov9282, OV9282_REG_TIMING_FORMAT_2, 1,
 621                                 current_val);
 622 }
 623
 624 static int ov9282_set_ctrl_vflip(struct ov9282 *ov9282, int value)
 625 {
 626         u32 current_val;
 627         int ret = ov9282_read_reg(ov9282, OV9282_REG_TIMING_FORMAT_1, 1,
 628                                   &current_val);
 629         if (ret)
 630                 return ret;
 631
 632         if (value)
 633                 current_val |= OV9282_FLIP_BIT;
 634         else
 635                 current_val &= ~OV9282_FLIP_BIT;
 636
 637         return ov9282_write_reg(ov9282, OV9282_REG_TIMING_FORMAT_1, 1,
 638                                 current_val);
 639 }
 640
 641 /**
 642  * ov9282_set_ctrl() - Set subdevice control
 643  * @ctrl: pointer to v4l2_ctrl structure
 644  *
 645  * Supported controls:
 646  * - V4L2_CID_VBLANK
 647  * - cluster controls:
 648  *   - V4L2_CID_ANALOGUE_GAIN
 649  *   - V4L2_CID_EXPOSURE
 650  *
 651  * Return: 0 if successful, error code otherwise.
 652  */
 653 static int ov9282_set_ctrl(struct v4l2_ctrl *ctrl)
 654 {
 655         struct ov9282 *ov9282 =
 656                 container_of(ctrl->handler, struct ov9282, ctrl_handler);
 657         u32 analog_gain;
 658         u32 exposure;
 659         u32 lpfr;
 660         int ret;
 661
 662         switch (ctrl->id) {
 663         case V4L2_CID_VBLANK:
 664                 ov9282->vblank = ov9282->vblank_ctrl->val;
 665
 666                 dev_dbg(ov9282->dev, "Received vblank %u, new lpfr %u",
 667                         ov9282->vblank,
 668                         ov9282->vblank + ov9282->cur_mode->height);
 669
 670                 ret = __v4l2_ctrl_modify_range(ov9282->exp_ctrl,
 671                                                OV9282_EXPOSURE_MIN,
 672                                                ov9282->vblank +
 673                                                ov9282->cur_mode->height -
 674                                                OV9282_EXPOSURE_OFFSET,
 675                                                1, OV9282_EXPOSURE_DEFAULT);
 676                 break;
 677         }
 678
 679         /* Set controls only if sensor is in power on state */
 680         if (!pm_runtime_get_if_in_use(ov9282->dev))
 681                 return 0;
 682
 683         switch (ctrl->id) {
 684         case V4L2_CID_EXPOSURE:
 685                 exposure = ctrl->val;
 686                 analog_gain = ov9282->again_ctrl->val;
 687
 688                 dev_dbg(ov9282->dev, "Received exp %u, analog gain %u",
 689                         exposure, analog_gain);
 690
 691                 ret = ov9282_update_exp_gain(ov9282, exposure, analog_gain);
 692                 break;
 693         case V4L2_CID_VBLANK:
 694                 lpfr = ov9282->vblank + ov9282->cur_mode->height;
 695                 ret = ov9282_write_reg(ov9282, OV9282_REG_LPFR, 2, lpfr);
 696                 break;
 697         case V4L2_CID_HFLIP:
 698                 ret = ov9282_set_ctrl_hflip(ov9282, ctrl->val);
 699                 break;
 700         case V4L2_CID_VFLIP:
 701                 ret = ov9282_set_ctrl_vflip(ov9282, ctrl->val);
 702                 break;
 703         case V4L2_CID_HBLANK:
 704                 ret = ov9282_write_reg(ov9282, OV9282_REG_TIMING_HTS, 2,
 705                                        (ctrl->val + ov9282->cur_mode->width) >> 1);
 706                 break;
 707         default:
 708                 dev_err(ov9282->dev, "Invalid control %d", ctrl->id);
 709                 ret = -EINVAL;
 710         }
 711
 712         pm_runtime_put(ov9282->dev);
 713
 714         return ret;
 715 }
 716
 717 /* V4l2 subdevice control ops*/
 718 static const struct v4l2_ctrl_ops ov9282_ctrl_ops = {
 719         .s_ctrl = ov9282_set_ctrl,
 720 };
 721
 722 /**
 723  * ov9282_enum_mbus_code() - Enumerate V4L2 sub-device mbus codes
 724  * @sd: pointer to ov9282 V4L2 sub-device structure
 725  * @sd_state: V4L2 sub-device configuration
 726  * @code: V4L2 sub-device code enumeration need to be filled
 727  *
 728  * Return: 0 if successful, error code otherwise.
 729  */
 730 static int ov9282_enum_mbus_code(struct v4l2_subdev *sd,
 731                                  struct v4l2_subdev_state *sd_state,
 732                                  struct v4l2_subdev_mbus_code_enum *code)
 733 {
 734         switch (code->index) {
 735         case 0:
 736                 code->code = MEDIA_BUS_FMT_Y10_1X10;
 737                 break;
 738         case 1:
 739                 code->code = MEDIA_BUS_FMT_Y8_1X8;
 740                 break;
 741         default:
 742                 return -EINVAL;
 743         }
 744
 745         return 0;
 746 }
 747
 748 /**
 749  * ov9282_enum_frame_size() - Enumerate V4L2 sub-device frame sizes
 750  * @sd: pointer to ov9282 V4L2 sub-device structure
 751  * @sd_state: V4L2 sub-device configuration
 752  * @fsize: V4L2 sub-device size enumeration need to be filled
 753  *
 754  * Return: 0 if successful, error code otherwise.
 755  */
 756 static int ov9282_enum_frame_size(struct v4l2_subdev *sd,
 757                                   struct v4l2_subdev_state *sd_state,
 758                                   struct v4l2_subdev_frame_size_enum *fsize)
 759 {
 760         if (fsize->index >= ARRAY_SIZE(supported_modes))
 761                 return -EINVAL;
 762
 763         if (fsize->code != MEDIA_BUS_FMT_Y10_1X10 &&
 764             fsize->code != MEDIA_BUS_FMT_Y8_1X8)
 765                 return -EINVAL;
 766
 767         fsize->min_width = supported_modes[fsize->index].width;
 768         fsize->max_width = fsize->min_width;
 769         fsize->min_height = supported_modes[fsize->index].height;
 770         fsize->max_height = fsize->min_height;
 771
 772         return 0;
 773 }
 774
 775 /**
 776  * ov9282_fill_pad_format() - Fill subdevice pad format
 777  *                            from selected sensor mode
 778  * @ov9282: pointer to ov9282 device
 779  * @mode: pointer to ov9282_mode sensor mode
 780  * @code: mbus code to be stored
 781  * @fmt: V4L2 sub-device format need to be filled
 782  */
 783 static void ov9282_fill_pad_format(struct ov9282 *ov9282,
 784                                    const struct ov9282_mode *mode,
 785                                    u32 code,
 786                                    struct v4l2_subdev_format *fmt)
 787 {
 788         fmt->format.width = mode->width;
 789         fmt->format.height = mode->height;
 790         fmt->format.code = code;
 791         fmt->format.field = V4L2_FIELD_NONE;
 792         fmt->format.colorspace = V4L2_COLORSPACE_RAW;
 793         fmt->format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
 794         fmt->format.quantization = V4L2_QUANTIZATION_DEFAULT;
 795         fmt->format.xfer_func = V4L2_XFER_FUNC_NONE;
 796 }
 797
 798 /**
 799  * ov9282_get_pad_format() - Get subdevice pad format
 800  * @sd: pointer to ov9282 V4L2 sub-device structure
 801  * @sd_state: V4L2 sub-device configuration
 802  * @fmt: V4L2 sub-device format need to be set
 803  *
 804  * Return: 0 if successful, error code otherwise.
 805  */
 806 static int ov9282_get_pad_format(struct v4l2_subdev *sd,
 807                                  struct v4l2_subdev_state *sd_state,
 808                                  struct v4l2_subdev_format *fmt)
 809 {
 810         struct ov9282 *ov9282 = to_ov9282(sd);
 811
 812         mutex_lock(&ov9282->mutex);
 813
 814         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 815                 struct v4l2_mbus_framefmt *framefmt;
 816
 817                 framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad);
 818                 fmt->format = *framefmt;
 819         } else {
 820                 ov9282_fill_pad_format(ov9282, ov9282->cur_mode, ov9282->code,
 821                                        fmt);
 822         }
 823
 824         mutex_unlock(&ov9282->mutex);
 825
 826         return 0;
 827 }
 828
 829 /**
 830  * ov9282_set_pad_format() - Set subdevice pad format
 831  * @sd: pointer to ov9282 V4L2 sub-device structure
 832  * @sd_state: V4L2 sub-device configuration
 833  * @fmt: V4L2 sub-device format need to be set
 834  *
 835  * Return: 0 if successful, error code otherwise.
 836  */
 837 static int ov9282_set_pad_format(struct v4l2_subdev *sd,
 838                                  struct v4l2_subdev_state *sd_state,
 839                                  struct v4l2_subdev_format *fmt)
 840 {
 841         struct ov9282 *ov9282 = to_ov9282(sd);
 842         const struct ov9282_mode *mode;
 843         u32 code;
 844         int ret = 0;
 845
 846         mutex_lock(&ov9282->mutex);
 847
 848         mode = v4l2_find_nearest_size(supported_modes,
 849                                       ARRAY_SIZE(supported_modes),
 850                                       width, height,
 851                                       fmt->format.width,
 852                                       fmt->format.height);
 853         if (fmt->format.code == MEDIA_BUS_FMT_Y8_1X8)
 854                 code = MEDIA_BUS_FMT_Y8_1X8;
 855         else
 856                 code = MEDIA_BUS_FMT_Y10_1X10;
 857
 858         ov9282_fill_pad_format(ov9282, mode, code, fmt);
 859
 860         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 861                 struct v4l2_mbus_framefmt *framefmt;
 862
 863                 framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad);
 864                 *framefmt = fmt->format;
 865         } else {
 866                 ret = ov9282_update_controls(ov9282, mode, fmt);
 867                 if (!ret) {
 868                         ov9282->cur_mode = mode;
 869                         ov9282->code = code;
 870                 }
 871         }
 872
 873         mutex_unlock(&ov9282->mutex);
 874
 875         return ret;
 876 }
 877
 878 /**
 879  * ov9282_init_state() - Initialize sub-device state
 880  * @sd: pointer to ov9282 V4L2 sub-device structure
 881  * @sd_state: V4L2 sub-device configuration
 882  *
 883  * Return: 0 if successful, error code otherwise.
 884  */
 885 static int ov9282_init_state(struct v4l2_subdev *sd,
 886                              struct v4l2_subdev_state *sd_state)
 887 {
 888         struct ov9282 *ov9282 = to_ov9282(sd);
 889         struct v4l2_subdev_format fmt = { 0 };
 890
 891         fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 892         ov9282_fill_pad_format(ov9282, &supported_modes[DEFAULT_MODE],
 893                                ov9282->code, &fmt);
 894
 895         return ov9282_set_pad_format(sd, sd_state, &fmt);
 896 }
 897
 898 static const struct v4l2_rect *
 899 __ov9282_get_pad_crop(struct ov9282 *ov9282,
 900                       struct v4l2_subdev_state *sd_state,
 901                       unsigned int pad, enum v4l2_subdev_format_whence which)
 902 {
 903         switch (which) {
 904         case V4L2_SUBDEV_FORMAT_TRY:
 905                 return v4l2_subdev_state_get_crop(sd_state, pad);
 906         case V4L2_SUBDEV_FORMAT_ACTIVE:
 907                 return &ov9282->cur_mode->crop;
 908         }
 909
 910         return NULL;
 911 }
 912
 913 static int ov9282_get_selection(struct v4l2_subdev *sd,
 914                                 struct v4l2_subdev_state *sd_state,
 915                                 struct v4l2_subdev_selection *sel)
 916 {
 917         switch (sel->target) {
 918         case V4L2_SEL_TGT_CROP: {
 919                 struct ov9282 *ov9282 = to_ov9282(sd);
 920
 921                 mutex_lock(&ov9282->mutex);
 922                 sel->r = *__ov9282_get_pad_crop(ov9282, sd_state, sel->pad,
 923                                                 sel->which);
 924                 mutex_unlock(&ov9282->mutex);
 925
 926                 return 0;
 927         }
 928
 929         case V4L2_SEL_TGT_NATIVE_SIZE:
 930                 sel->r.top = 0;
 931                 sel->r.left = 0;
 932                 sel->r.width = OV9282_NATIVE_WIDTH;
 933                 sel->r.height = OV9282_NATIVE_HEIGHT;
 934
 935                 return 0;
 936
 937         case V4L2_SEL_TGT_CROP_DEFAULT:
 938         case V4L2_SEL_TGT_CROP_BOUNDS:
 939                 sel->r.top = OV9282_PIXEL_ARRAY_TOP;
 940                 sel->r.left = OV9282_PIXEL_ARRAY_LEFT;
 941                 sel->r.width = OV9282_PIXEL_ARRAY_WIDTH;
 942                 sel->r.height = OV9282_PIXEL_ARRAY_HEIGHT;
 943
 944                 return 0;
 945         }
 946
 947         return -EINVAL;
 948 }
 949
 950 /**
 951  * ov9282_start_streaming() - Start sensor stream
 952  * @ov9282: pointer to ov9282 device
 953  *
 954  * Return: 0 if successful, error code otherwise.
 955  */
 956 static int ov9282_start_streaming(struct ov9282 *ov9282)
 957 {
 958         const struct ov9282_reg bitdepth_regs[2][2] = {
 959                 {
 960                         {OV9282_REG_PLL_CTRL_0D, OV9282_PLL_CTRL_0D_RAW10},
 961                         {OV9282_REG_ANA_CORE_2, OV9282_ANA_CORE2_RAW10},
 962                 }, {
 963                         {OV9282_REG_PLL_CTRL_0D, OV9282_PLL_CTRL_0D_RAW8},
 964                         {OV9282_REG_ANA_CORE_2, OV9282_ANA_CORE2_RAW8},
 965                 }
 966         };
 967         const struct ov9282_reg_list *reg_list;
 968         int bitdepth_index;
 969         int ret;
 970
 971         /* Write common registers */
 972         ret = ov9282_write_regs(ov9282, common_regs_list.regs,
 973                                 common_regs_list.num_of_regs);
 974         if (ret) {
 975                 dev_err(ov9282->dev, "fail to write common registers");
 976                 return ret;
 977         }
 978
 979         bitdepth_index = ov9282->code == MEDIA_BUS_FMT_Y10_1X10 ? 0 : 1;
 980         ret = ov9282_write_regs(ov9282, bitdepth_regs[bitdepth_index], 2);
 981         if (ret) {
 982                 dev_err(ov9282->dev, "fail to write bitdepth regs");
 983                 return ret;
 984         }
 985
 986         /* Write sensor mode registers */
 987         reg_list = &ov9282->cur_mode->reg_list;
 988         ret = ov9282_write_regs(ov9282, reg_list->regs, reg_list->num_of_regs);
 989         if (ret) {
 990                 dev_err(ov9282->dev, "fail to write initial registers");
 991                 return ret;
 992         }
 993
 994         /* Setup handler will write actual exposure and gain */
 995         ret =  __v4l2_ctrl_handler_setup(ov9282->sd.ctrl_handler);
 996         if (ret) {
 997                 dev_err(ov9282->dev, "fail to setup handler");
 998                 return ret;
 999         }
1000
1001         /* Start streaming */
1002         ret = ov9282_write_reg(ov9282, OV9282_REG_MODE_SELECT,
1003                                1, OV9282_MODE_STREAMING);
1004         if (ret) {
1005                 dev_err(ov9282->dev, "fail to start streaming");
1006                 return ret;
1007         }
1008
1009         return 0;
1010 }
1011
1012 /**
1013  * ov9282_stop_streaming() - Stop sensor stream
1014  * @ov9282: pointer to ov9282 device
1015  *
1016  * Return: 0 if successful, error code otherwise.
1017  */
1018 static int ov9282_stop_streaming(struct ov9282 *ov9282)
1019 {
1020         return ov9282_write_reg(ov9282, OV9282_REG_MODE_SELECT,
1021                                 1, OV9282_MODE_STANDBY);
1022 }
1023
1024 /**
1025  * ov9282_set_stream() - Enable sensor streaming
1026  * @sd: pointer to ov9282 subdevice
1027  * @enable: set to enable sensor streaming
1028  *
1029  * Return: 0 if successful, error code otherwise.
1030  */
1031 static int ov9282_set_stream(struct v4l2_subdev *sd, int enable)
1032 {
1033         struct ov9282 *ov9282 = to_ov9282(sd);
1034         int ret;
1035
1036         mutex_lock(&ov9282->mutex);
1037
1038         if (enable) {
1039                 ret = pm_runtime_resume_and_get(ov9282->dev);
1040                 if (ret)
1041                         goto error_unlock;
1042
1043                 ret = ov9282_start_streaming(ov9282);
1044                 if (ret)
1045                         goto error_power_off;
1046         } else {
1047                 ov9282_stop_streaming(ov9282);
1048                 pm_runtime_put(ov9282->dev);
1049         }
1050
1051         mutex_unlock(&ov9282->mutex);
1052
1053         return 0;
1054
1055 error_power_off:
1056         pm_runtime_put(ov9282->dev);
1057 error_unlock:
1058         mutex_unlock(&ov9282->mutex);
1059
1060         return ret;
1061 }
1062
1063 /**
1064  * ov9282_detect() - Detect ov9282 sensor
1065  * @ov9282: pointer to ov9282 device
1066  *
1067  * Return: 0 if successful, -EIO if sensor id does not match
1068  */
1069 static int ov9282_detect(struct ov9282 *ov9282)
1070 {
1071         int ret;
1072         u32 val;
1073
1074         ret = ov9282_read_reg(ov9282, OV9282_REG_ID, 2, &val);
1075         if (ret)
1076                 return ret;
1077
1078         if (val != OV9282_ID) {
1079                 dev_err(ov9282->dev, "chip id mismatch: %x!=%x",
1080                         OV9282_ID, val);
1081                 return -ENXIO;
1082         }
1083
1084         return 0;
1085 }
1086
1087 static int ov9282_configure_regulators(struct ov9282 *ov9282)
1088 {
1089         unsigned int i;
1090
1091         for (i = 0; i < OV9282_NUM_SUPPLIES; i++)
1092                 ov9282->supplies[i].supply = ov9282_supply_names[i];
1093
1094         return devm_regulator_bulk_get(ov9282->dev,
1095                                        OV9282_NUM_SUPPLIES,
1096                                        ov9282->supplies);
1097 }
1098
1099 /**
1100  * ov9282_parse_hw_config() - Parse HW configuration and check if supported
1101  * @ov9282: pointer to ov9282 device
1102  *
1103  * Return: 0 if successful, error code otherwise.
1104  */
1105 static int ov9282_parse_hw_config(struct ov9282 *ov9282)
1106 {
1107         struct fwnode_handle *fwnode = dev_fwnode(ov9282->dev);
1108         struct v4l2_fwnode_endpoint bus_cfg = {
1109                 .bus_type = V4L2_MBUS_CSI2_DPHY
1110         };
1111         struct fwnode_handle *ep;
1112         unsigned long rate;
1113         unsigned int i;
1114         int ret;
1115
1116         if (!fwnode)
1117                 return -ENXIO;
1118
1119         /* Request optional reset pin */
1120         ov9282->reset_gpio = devm_gpiod_get_optional(ov9282->dev, "reset",
1121                                                      GPIOD_OUT_LOW);
1122         if (IS_ERR(ov9282->reset_gpio)) {
1123                 dev_err(ov9282->dev, "failed to get reset gpio %ld",
1124                         PTR_ERR(ov9282->reset_gpio));
1125                 return PTR_ERR(ov9282->reset_gpio);
1126         }
1127
1128         /* Get sensor input clock */
1129         ov9282->inclk = devm_clk_get(ov9282->dev, NULL);
1130         if (IS_ERR(ov9282->inclk)) {
1131                 dev_err(ov9282->dev, "could not get inclk");
1132                 return PTR_ERR(ov9282->inclk);
1133         }
1134
1135         ret = ov9282_configure_regulators(ov9282);
1136         if (ret)
1137                 return dev_err_probe(ov9282->dev, ret,
1138                                      "Failed to get power regulators\n");
1139
1140         rate = clk_get_rate(ov9282->inclk);
1141         if (rate != OV9282_INCLK_RATE) {
1142                 dev_err(ov9282->dev, "inclk frequency mismatch");
1143                 return -EINVAL;
1144         }
1145
1146         ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
1147         if (!ep)
1148                 return -ENXIO;
1149
1150         ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
1151         fwnode_handle_put(ep);
1152         if (ret)
1153                 return ret;
1154
1155         ov9282->noncontinuous_clock =
1156                 bus_cfg.bus.mipi_csi2.flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
1157
1158         if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV9282_NUM_DATA_LANES) {
1159                 dev_err(ov9282->dev,
1160                         "number of CSI2 data lanes %d is not supported",
1161                         bus_cfg.bus.mipi_csi2.num_data_lanes);
1162                 ret = -EINVAL;
1163                 goto done_endpoint_free;
1164         }
1165
1166         if (!bus_cfg.nr_of_link_frequencies) {
1167                 dev_err(ov9282->dev, "no link frequencies defined");
1168                 ret = -EINVAL;
1169                 goto done_endpoint_free;
1170         }
1171
1172         for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
1173                 if (bus_cfg.link_frequencies[i] == OV9282_LINK_FREQ)
1174                         goto done_endpoint_free;
1175
1176         ret = -EINVAL;
1177
1178 done_endpoint_free:
1179         v4l2_fwnode_endpoint_free(&bus_cfg);
1180
1181         return ret;
1182 }
1183
1184 /* V4l2 subdevice ops */
1185 static const struct v4l2_subdev_core_ops ov9282_core_ops = {
1186         .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
1187         .unsubscribe_event = v4l2_event_subdev_unsubscribe,
1188 };
1189
1190 static const struct v4l2_subdev_video_ops ov9282_video_ops = {
1191         .s_stream = ov9282_set_stream,
1192 };
1193
1194 static const struct v4l2_subdev_pad_ops ov9282_pad_ops = {
1195         .enum_mbus_code = ov9282_enum_mbus_code,
1196         .enum_frame_size = ov9282_enum_frame_size,
1197         .get_fmt = ov9282_get_pad_format,
1198         .set_fmt = ov9282_set_pad_format,
1199         .get_selection = ov9282_get_selection,
1200 };
1201
1202 static const struct v4l2_subdev_ops ov9282_subdev_ops = {
1203         .core = &ov9282_core_ops,
1204         .video = &ov9282_video_ops,
1205         .pad = &ov9282_pad_ops,
1206 };
1207
1208 static const struct v4l2_subdev_internal_ops ov9282_internal_ops = {
1209         .init_state = ov9282_init_state,
1210 };
1211
1212 /**
1213  * ov9282_power_on() - Sensor power on sequence
1214  * @dev: pointer to i2c device
1215  *
1216  * Return: 0 if successful, error code otherwise.
1217  */
1218 static int ov9282_power_on(struct device *dev)
1219 {
1220         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1221         struct ov9282 *ov9282 = to_ov9282(sd);
1222         int ret;
1223
1224         ret = regulator_bulk_enable(OV9282_NUM_SUPPLIES, ov9282->supplies);
1225         if (ret < 0) {
1226                 dev_err(dev, "Failed to enable regulators\n");
1227                 return ret;
1228         }
1229
1230         usleep_range(400, 600);
1231
1232         gpiod_set_value_cansleep(ov9282->reset_gpio, 1);
1233
1234         ret = clk_prepare_enable(ov9282->inclk);
1235         if (ret) {
1236                 dev_err(ov9282->dev, "fail to enable inclk");
1237                 goto error_reset;
1238         }
1239
1240         usleep_range(400, 600);
1241
1242         ret = ov9282_write_reg(ov9282, OV9282_REG_MIPI_CTRL00, 1,
1243                                ov9282->noncontinuous_clock ?
1244                                         OV9282_GATED_CLOCK : 0);
1245         if (ret) {
1246                 dev_err(ov9282->dev, "fail to write MIPI_CTRL00");
1247                 goto error_clk;
1248         }
1249
1250         return 0;
1251
1252 error_clk:
1253         clk_disable_unprepare(ov9282->inclk);
1254 error_reset:
1255         gpiod_set_value_cansleep(ov9282->reset_gpio, 0);
1256
1257         regulator_bulk_disable(OV9282_NUM_SUPPLIES, ov9282->supplies);
1258
1259         return ret;
1260 }
1261
1262 /**
1263  * ov9282_power_off() - Sensor power off sequence
1264  * @dev: pointer to i2c device
1265  *
1266  * Return: 0 if successful, error code otherwise.
1267  */
1268 static int ov9282_power_off(struct device *dev)
1269 {
1270         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1271         struct ov9282 *ov9282 = to_ov9282(sd);
1272
1273         gpiod_set_value_cansleep(ov9282->reset_gpio, 0);
1274
1275         clk_disable_unprepare(ov9282->inclk);
1276
1277         regulator_bulk_disable(OV9282_NUM_SUPPLIES, ov9282->supplies);
1278
1279         return 0;
1280 }
1281
1282 /**
1283  * ov9282_init_controls() - Initialize sensor subdevice controls
1284  * @ov9282: pointer to ov9282 device
1285  *
1286  * Return: 0 if successful, error code otherwise.
1287  */
1288 static int ov9282_init_controls(struct ov9282 *ov9282)
1289 {
1290         struct v4l2_ctrl_handler *ctrl_hdlr = &ov9282->ctrl_handler;
1291         const struct ov9282_mode *mode = ov9282->cur_mode;
1292         struct v4l2_fwnode_device_properties props;
1293         u32 hblank_min;
1294         u32 lpfr;
1295         int ret;
1296
1297         ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
1298         if (ret)
1299                 return ret;
1300
1301         /* Serialize controls with sensor device */
1302         ctrl_hdlr->lock = &ov9282->mutex;
1303
1304         /* Initialize exposure and gain */
1305         lpfr = mode->vblank + mode->height;
1306         ov9282->exp_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1307                                              &ov9282_ctrl_ops,
1308                                              V4L2_CID_EXPOSURE,
1309                                              OV9282_EXPOSURE_MIN,
1310                                              lpfr - OV9282_EXPOSURE_OFFSET,
1311                                              OV9282_EXPOSURE_STEP,
1312                                              OV9282_EXPOSURE_DEFAULT);
1313
1314         ov9282->again_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1315                                                &ov9282_ctrl_ops,
1316                                                V4L2_CID_ANALOGUE_GAIN,
1317                                                OV9282_AGAIN_MIN,
1318                                                OV9282_AGAIN_MAX,
1319                                                OV9282_AGAIN_STEP,
1320                                                OV9282_AGAIN_DEFAULT);
1321
1322         v4l2_ctrl_cluster(2, &ov9282->exp_ctrl);
1323
1324         ov9282->vblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1325                                                 &ov9282_ctrl_ops,
1326                                                 V4L2_CID_VBLANK,
1327                                                 mode->vblank_min,
1328                                                 mode->vblank_max,
1329                                                 1, mode->vblank);
1330
1331         v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_VFLIP,
1332                           0, 1, 1, 1);
1333
1334         v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_HFLIP,
1335                           0, 1, 1, 1);
1336
1337         /* Read only controls */
1338         ov9282->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops,
1339                                                V4L2_CID_PIXEL_RATE,
1340                                                OV9282_PIXEL_RATE_10BIT,
1341                                                OV9282_PIXEL_RATE_10BIT, 1,
1342                                                OV9282_PIXEL_RATE_10BIT);
1343
1344         ov9282->link_freq_ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr,
1345                                                         &ov9282_ctrl_ops,
1346                                                         V4L2_CID_LINK_FREQ,
1347                                                         ARRAY_SIZE(link_freq) -
1348                                                         1,
1349                                                         mode->link_freq_idx,
1350                                                         link_freq);
1351         if (ov9282->link_freq_ctrl)
1352                 ov9282->link_freq_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1353
1354         hblank_min = mode->hblank_min[ov9282->noncontinuous_clock ? 0 : 1];
1355         ov9282->hblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1356                                                 &ov9282_ctrl_ops,
1357                                                 V4L2_CID_HBLANK,
1358                                                 hblank_min,
1359                                                 OV9282_TIMING_HTS_MAX - mode->width,
1360                                                 1, hblank_min);
1361
1362         ret = v4l2_fwnode_device_parse(ov9282->dev, &props);
1363         if (!ret) {
1364                 /* Failure sets ctrl_hdlr->error, which we check afterwards anyway */
1365                 v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &ov9282_ctrl_ops,
1366                                                 &props);
1367         }
1368
1369         if (ctrl_hdlr->error || ret) {
1370                 dev_err(ov9282->dev, "control init failed: %d",
1371                         ctrl_hdlr->error);
1372                 v4l2_ctrl_handler_free(ctrl_hdlr);
1373                 return ctrl_hdlr->error;
1374         }
1375
1376         ov9282->sd.ctrl_handler = ctrl_hdlr;
1377
1378         return 0;
1379 }
1380
1381 /**
1382  * ov9282_probe() - I2C client device binding
1383  * @client: pointer to i2c client device
1384  *
1385  * Return: 0 if successful, error code otherwise.
1386  */
1387 static int ov9282_probe(struct i2c_client *client)
1388 {
1389         struct ov9282 *ov9282;
1390         int ret;
1391
1392         ov9282 = devm_kzalloc(&client->dev, sizeof(*ov9282), GFP_KERNEL);
1393         if (!ov9282)
1394                 return -ENOMEM;
1395
1396         ov9282->dev = &client->dev;
1397
1398         /* Initialize subdev */
1399         v4l2_i2c_subdev_init(&ov9282->sd, client, &ov9282_subdev_ops);
1400         ov9282->sd.internal_ops = &ov9282_internal_ops;
1401         v4l2_i2c_subdev_set_name(&ov9282->sd, client,
1402                                  device_get_match_data(ov9282->dev), NULL);
1403
1404         ret = ov9282_parse_hw_config(ov9282);
1405         if (ret) {
1406                 dev_err(ov9282->dev, "HW configuration is not supported");
1407                 return ret;
1408         }
1409
1410         mutex_init(&ov9282->mutex);
1411
1412         ret = ov9282_power_on(ov9282->dev);
1413         if (ret) {
1414                 dev_err(ov9282->dev, "failed to power-on the sensor");
1415                 goto error_mutex_destroy;
1416         }
1417
1418         /* Check module identity */
1419         ret = ov9282_detect(ov9282);
1420         if (ret) {
1421                 dev_err(ov9282->dev, "failed to find sensor: %d", ret);
1422                 goto error_power_off;
1423         }
1424
1425         /* Set default mode to first mode */
1426         ov9282->cur_mode = &supported_modes[DEFAULT_MODE];
1427         ov9282->code = MEDIA_BUS_FMT_Y10_1X10;
1428         ov9282->vblank = ov9282->cur_mode->vblank;
1429
1430         ret = ov9282_init_controls(ov9282);
1431         if (ret) {
1432                 dev_err(ov9282->dev, "failed to init controls: %d", ret);
1433                 goto error_power_off;
1434         }
1435
1436         /* Initialize subdev */
1437         ov9282->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
1438                             V4L2_SUBDEV_FL_HAS_EVENTS;
1439         ov9282->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1440
1441         /* Initialize source pad */
1442         ov9282->pad.flags = MEDIA_PAD_FL_SOURCE;
1443         ret = media_entity_pads_init(&ov9282->sd.entity, 1, &ov9282->pad);
1444         if (ret) {
1445                 dev_err(ov9282->dev, "failed to init entity pads: %d", ret);
1446                 goto error_handler_free;
1447         }
1448
1449         ret = v4l2_async_register_subdev_sensor(&ov9282->sd);
1450         if (ret < 0) {
1451                 dev_err(ov9282->dev,
1452                         "failed to register async subdev: %d", ret);
1453                 goto error_media_entity;
1454         }
1455
1456         pm_runtime_set_active(ov9282->dev);
1457         pm_runtime_enable(ov9282->dev);
1458         pm_runtime_idle(ov9282->dev);
1459
1460         return 0;
1461
1462 error_media_entity:
1463         media_entity_cleanup(&ov9282->sd.entity);
1464 error_handler_free:
1465         v4l2_ctrl_handler_free(ov9282->sd.ctrl_handler);
1466 error_power_off:
1467         ov9282_power_off(ov9282->dev);
1468 error_mutex_destroy:
1469         mutex_destroy(&ov9282->mutex);
1470
1471         return ret;
1472 }
1473
1474 /**
1475  * ov9282_remove() - I2C client device unbinding
1476  * @client: pointer to I2C client device
1477  *
1478  * Return: 0 if successful, error code otherwise.
1479  */
1480 static void ov9282_remove(struct i2c_client *client)
1481 {
1482         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1483         struct ov9282 *ov9282 = to_ov9282(sd);
1484
1485         v4l2_async_unregister_subdev(sd);
1486         media_entity_cleanup(&sd->entity);
1487         v4l2_ctrl_handler_free(sd->ctrl_handler);
1488
1489         pm_runtime_disable(&client->dev);
1490         if (!pm_runtime_status_suspended(&client->dev))
1491                 ov9282_power_off(&client->dev);
1492         pm_runtime_set_suspended(&client->dev);
1493
1494         mutex_destroy(&ov9282->mutex);
1495 }
1496
1497 static const struct dev_pm_ops ov9282_pm_ops = {
1498         SET_RUNTIME_PM_OPS(ov9282_power_off, ov9282_power_on, NULL)
1499 };
1500
1501 static const struct of_device_id ov9282_of_match[] = {
1502         { .compatible = "ovti,ov9281", .data = "ov9281" },
1503         { .compatible = "ovti,ov9282", .data = "ov9282" },
1504         { }
1505 };
1506
1507 MODULE_DEVICE_TABLE(of, ov9282_of_match);
1508
1509 static struct i2c_driver ov9282_driver = {
1510         .probe = ov9282_probe,
1511         .remove = ov9282_remove,
1512         .driver = {
1513                 .name = "ov9282",
1514                 .pm = &ov9282_pm_ops,
1515                 .of_match_table = ov9282_of_match,
1516         },
1517 };
1518
1519 module_i2c_driver(ov9282_driver);
1520
1521 MODULE_DESCRIPTION("OmniVision ov9282 sensor driver");
1522 MODULE_LICENSE("GPL");