drivers/media/i2c/imx334.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Sony imx334 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
  15 #include <media/v4l2-ctrls.h>
  16 #include <media/v4l2-fwnode.h>
  17 #include <media/v4l2-subdev.h>
  18
  19 /* Streaming Mode */
  20 #define IMX334_REG_MODE_SELECT  0x3000
  21 #define IMX334_MODE_STANDBY     0x01
  22 #define IMX334_MODE_STREAMING   0x00
  23
  24 /* Lines per frame */
  25 #define IMX334_REG_LPFR         0x3030
  26
  27 /* Chip ID */
  28 #define IMX334_REG_ID           0x3044
  29 #define IMX334_ID               0x1e
  30
  31 /* Exposure control */
  32 #define IMX334_REG_SHUTTER      0x3058
  33 #define IMX334_EXPOSURE_MIN     1
  34 #define IMX334_EXPOSURE_OFFSET  5
  35 #define IMX334_EXPOSURE_STEP    1
  36 #define IMX334_EXPOSURE_DEFAULT 0x0648
  37
  38 /* Analog gain control */
  39 #define IMX334_REG_AGAIN        0x30e8
  40 #define IMX334_AGAIN_MIN        0
  41 #define IMX334_AGAIN_MAX        240
  42 #define IMX334_AGAIN_STEP       1
  43 #define IMX334_AGAIN_DEFAULT    0
  44
  45 /* Group hold register */
  46 #define IMX334_REG_HOLD         0x3001
  47
  48 /* Input clock rate */
  49 #define IMX334_INCLK_RATE       24000000
  50
  51 /* CSI2 HW configuration */
  52 #define IMX334_LINK_FREQ_891M   891000000
  53 #define IMX334_LINK_FREQ_445M   445500000
  54 #define IMX334_NUM_DATA_LANES   4
  55
  56 #define IMX334_REG_MIN          0x00
  57 #define IMX334_REG_MAX          0xfffff
  58
  59 /**
  60  * struct imx334_reg - imx334 sensor register
  61  * @address: Register address
  62  * @val: Register value
  63  */
  64 struct imx334_reg {
  65         u16 address;
  66         u8 val;
  67 };
  68
  69 /**
  70  * struct imx334_reg_list - imx334 sensor register list
  71  * @num_of_regs: Number of registers in the list
  72  * @regs: Pointer to register list
  73  */
  74 struct imx334_reg_list {
  75         u32 num_of_regs;
  76         const struct imx334_reg *regs;
  77 };
  78
  79 /**
  80  * struct imx334_mode - imx334 sensor mode structure
  81  * @width: Frame width
  82  * @height: Frame height
  83  * @hblank: Horizontal blanking in lines
  84  * @vblank: Vertical blanking in lines
  85  * @vblank_min: Minimal vertical blanking in lines
  86  * @vblank_max: Maximum vertical blanking in lines
  87  * @pclk: Sensor pixel clock
  88  * @link_freq_idx: Link frequency index
  89  * @reg_list: Register list for sensor mode
  90  */
  91 struct imx334_mode {
  92         u32 width;
  93         u32 height;
  94         u32 hblank;
  95         u32 vblank;
  96         u32 vblank_min;
  97         u32 vblank_max;
  98         u64 pclk;
  99         u32 link_freq_idx;
 100         struct imx334_reg_list reg_list;
 101 };
 102
 103 /**
 104  * struct imx334 - imx334 sensor device structure
 105  * @dev: Pointer to generic device
 106  * @client: Pointer to i2c client
 107  * @sd: V4L2 sub-device
 108  * @pad: Media pad. Only one pad supported
 109  * @reset_gpio: Sensor reset gpio
 110  * @inclk: Sensor input clock
 111  * @ctrl_handler: V4L2 control handler
 112  * @link_freq_ctrl: Pointer to link frequency control
 113  * @pclk_ctrl: Pointer to pixel clock control
 114  * @hblank_ctrl: Pointer to horizontal blanking control
 115  * @vblank_ctrl: Pointer to vertical blanking control
 116  * @exp_ctrl: Pointer to exposure control
 117  * @again_ctrl: Pointer to analog gain control
 118  * @vblank: Vertical blanking in lines
 119  * @cur_mode: Pointer to current selected sensor mode
 120  * @mutex: Mutex for serializing sensor controls
 121  * @menu_skip_mask: Menu skip mask for link_freq_ctrl
 122  * @cur_code: current selected format code
 123  * @streaming: Flag indicating streaming state
 124  */
 125 struct imx334 {
 126         struct device *dev;
 127         struct i2c_client *client;
 128         struct v4l2_subdev sd;
 129         struct media_pad pad;
 130         struct gpio_desc *reset_gpio;
 131         struct clk *inclk;
 132         struct v4l2_ctrl_handler ctrl_handler;
 133         struct v4l2_ctrl *link_freq_ctrl;
 134         struct v4l2_ctrl *pclk_ctrl;
 135         struct v4l2_ctrl *hblank_ctrl;
 136         struct v4l2_ctrl *vblank_ctrl;
 137         struct {
 138                 struct v4l2_ctrl *exp_ctrl;
 139                 struct v4l2_ctrl *again_ctrl;
 140         };
 141         u32 vblank;
 142         const struct imx334_mode *cur_mode;
 143         struct mutex mutex;
 144         unsigned long menu_skip_mask;
 145         u32 cur_code;
 146         bool streaming;
 147 };
 148
 149 static const s64 link_freq[] = {
 150         IMX334_LINK_FREQ_891M,
 151         IMX334_LINK_FREQ_445M,
 152 };
 153
 154 /* Sensor mode registers for 1920x1080@30fps */
 155 static const struct imx334_reg mode_1920x1080_regs[] = {
 156         {0x3000, 0x01},
 157         {0x3018, 0x04},
 158         {0x3030, 0xca},
 159         {0x3031, 0x08},
 160         {0x3032, 0x00},
 161         {0x3034, 0x4c},
 162         {0x3035, 0x04},
 163         {0x302c, 0xf0},
 164         {0x302d, 0x03},
 165         {0x302e, 0x80},
 166         {0x302f, 0x07},
 167         {0x3074, 0xcc},
 168         {0x3075, 0x02},
 169         {0x308e, 0xcd},
 170         {0x308f, 0x02},
 171         {0x3076, 0x38},
 172         {0x3077, 0x04},
 173         {0x3090, 0x38},
 174         {0x3091, 0x04},
 175         {0x3308, 0x38},
 176         {0x3309, 0x04},
 177         {0x30C6, 0x00},
 178         {0x30c7, 0x00},
 179         {0x30ce, 0x00},
 180         {0x30cf, 0x00},
 181         {0x30d8, 0x18},
 182         {0x30d9, 0x0a},
 183         {0x304c, 0x00},
 184         {0x304e, 0x00},
 185         {0x304f, 0x00},
 186         {0x3050, 0x00},
 187         {0x30b6, 0x00},
 188         {0x30b7, 0x00},
 189         {0x3116, 0x08},
 190         {0x3117, 0x00},
 191         {0x31a0, 0x20},
 192         {0x31a1, 0x0f},
 193         {0x300c, 0x3b},
 194         {0x300d, 0x29},
 195         {0x314c, 0x29},
 196         {0x314d, 0x01},
 197         {0x315a, 0x06},
 198         {0x3168, 0xa0},
 199         {0x316a, 0x7e},
 200         {0x319e, 0x02},
 201         {0x3199, 0x00},
 202         {0x319d, 0x00},
 203         {0x31dd, 0x03},
 204         {0x3300, 0x00},
 205         {0x341c, 0xff},
 206         {0x341d, 0x01},
 207         {0x3a01, 0x03},
 208         {0x3a18, 0x7f},
 209         {0x3a19, 0x00},
 210         {0x3a1a, 0x37},
 211         {0x3a1b, 0x00},
 212         {0x3a1c, 0x37},
 213         {0x3a1d, 0x00},
 214         {0x3a1e, 0xf7},
 215         {0x3a1f, 0x00},
 216         {0x3a20, 0x3f},
 217         {0x3a21, 0x00},
 218         {0x3a20, 0x6f},
 219         {0x3a21, 0x00},
 220         {0x3a20, 0x3f},
 221         {0x3a21, 0x00},
 222         {0x3a20, 0x5f},
 223         {0x3a21, 0x00},
 224         {0x3a20, 0x2f},
 225         {0x3a21, 0x00},
 226         {0x3078, 0x02},
 227         {0x3079, 0x00},
 228         {0x307a, 0x00},
 229         {0x307b, 0x00},
 230         {0x3080, 0x02},
 231         {0x3081, 0x00},
 232         {0x3082, 0x00},
 233         {0x3083, 0x00},
 234         {0x3088, 0x02},
 235         {0x3094, 0x00},
 236         {0x3095, 0x00},
 237         {0x3096, 0x00},
 238         {0x309b, 0x02},
 239         {0x309c, 0x00},
 240         {0x309d, 0x00},
 241         {0x309e, 0x00},
 242         {0x30a4, 0x00},
 243         {0x30a5, 0x00},
 244         {0x3288, 0x21},
 245         {0x328a, 0x02},
 246         {0x3414, 0x05},
 247         {0x3416, 0x18},
 248         {0x35Ac, 0x0e},
 249         {0x3648, 0x01},
 250         {0x364a, 0x04},
 251         {0x364c, 0x04},
 252         {0x3678, 0x01},
 253         {0x367c, 0x31},
 254         {0x367e, 0x31},
 255         {0x3708, 0x02},
 256         {0x3714, 0x01},
 257         {0x3715, 0x02},
 258         {0x3716, 0x02},
 259         {0x3717, 0x02},
 260         {0x371c, 0x3d},
 261         {0x371d, 0x3f},
 262         {0x372c, 0x00},
 263         {0x372d, 0x00},
 264         {0x372e, 0x46},
 265         {0x372f, 0x00},
 266         {0x3730, 0x89},
 267         {0x3731, 0x00},
 268         {0x3732, 0x08},
 269         {0x3733, 0x01},
 270         {0x3734, 0xfe},
 271         {0x3735, 0x05},
 272         {0x375d, 0x00},
 273         {0x375e, 0x00},
 274         {0x375f, 0x61},
 275         {0x3760, 0x06},
 276         {0x3768, 0x1b},
 277         {0x3769, 0x1b},
 278         {0x376a, 0x1a},
 279         {0x376b, 0x19},
 280         {0x376c, 0x18},
 281         {0x376d, 0x14},
 282         {0x376e, 0x0f},
 283         {0x3776, 0x00},
 284         {0x3777, 0x00},
 285         {0x3778, 0x46},
 286         {0x3779, 0x00},
 287         {0x377a, 0x08},
 288         {0x377b, 0x01},
 289         {0x377c, 0x45},
 290         {0x377d, 0x01},
 291         {0x377e, 0x23},
 292         {0x377f, 0x02},
 293         {0x3780, 0xd9},
 294         {0x3781, 0x03},
 295         {0x3782, 0xf5},
 296         {0x3783, 0x06},
 297         {0x3784, 0xa5},
 298         {0x3788, 0x0f},
 299         {0x378a, 0xd9},
 300         {0x378b, 0x03},
 301         {0x378c, 0xeb},
 302         {0x378d, 0x05},
 303         {0x378e, 0x87},
 304         {0x378f, 0x06},
 305         {0x3790, 0xf5},
 306         {0x3792, 0x43},
 307         {0x3794, 0x7a},
 308         {0x3796, 0xa1},
 309         {0x37b0, 0x37},
 310         {0x3e04, 0x0e},
 311         {0x30e8, 0x50},
 312         {0x30e9, 0x00},
 313         {0x3e04, 0x0e},
 314         {0x3002, 0x00},
 315 };
 316
 317 /* Sensor mode registers for 3840x2160@30fps */
 318 static const struct imx334_reg mode_3840x2160_regs[] = {
 319         {0x3000, 0x01},
 320         {0x3002, 0x00},
 321         {0x3018, 0x04},
 322         {0x37b0, 0x36},
 323         {0x304c, 0x00},
 324         {0x300c, 0x3b},
 325         {0x300d, 0x2a},
 326         {0x3034, 0x26},
 327         {0x3035, 0x02},
 328         {0x314c, 0x29},
 329         {0x314d, 0x01},
 330         {0x315a, 0x02},
 331         {0x3168, 0xa0},
 332         {0x316a, 0x7e},
 333         {0x3288, 0x21},
 334         {0x328a, 0x02},
 335         {0x302c, 0x3c},
 336         {0x302d, 0x00},
 337         {0x302e, 0x00},
 338         {0x302f, 0x0f},
 339         {0x3076, 0x70},
 340         {0x3077, 0x08},
 341         {0x3090, 0x70},
 342         {0x3091, 0x08},
 343         {0x30d8, 0x20},
 344         {0x30d9, 0x12},
 345         {0x3308, 0x70},
 346         {0x3309, 0x08},
 347         {0x3414, 0x05},
 348         {0x3416, 0x18},
 349         {0x35ac, 0x0e},
 350         {0x3648, 0x01},
 351         {0x364a, 0x04},
 352         {0x364c, 0x04},
 353         {0x3678, 0x01},
 354         {0x367c, 0x31},
 355         {0x367e, 0x31},
 356         {0x3708, 0x02},
 357         {0x3714, 0x01},
 358         {0x3715, 0x02},
 359         {0x3716, 0x02},
 360         {0x3717, 0x02},
 361         {0x371c, 0x3d},
 362         {0x371d, 0x3f},
 363         {0x372c, 0x00},
 364         {0x372d, 0x00},
 365         {0x372e, 0x46},
 366         {0x372f, 0x00},
 367         {0x3730, 0x89},
 368         {0x3731, 0x00},
 369         {0x3732, 0x08},
 370         {0x3733, 0x01},
 371         {0x3734, 0xfe},
 372         {0x3735, 0x05},
 373         {0x375d, 0x00},
 374         {0x375e, 0x00},
 375         {0x375f, 0x61},
 376         {0x3760, 0x06},
 377         {0x3768, 0x1b},
 378         {0x3769, 0x1b},
 379         {0x376a, 0x1a},
 380         {0x376b, 0x19},
 381         {0x376c, 0x18},
 382         {0x376d, 0x14},
 383         {0x376e, 0x0f},
 384         {0x3776, 0x00},
 385         {0x3777, 0x00},
 386         {0x3778, 0x46},
 387         {0x3779, 0x00},
 388         {0x377a, 0x08},
 389         {0x377b, 0x01},
 390         {0x377c, 0x45},
 391         {0x377d, 0x01},
 392         {0x377e, 0x23},
 393         {0x377f, 0x02},
 394         {0x3780, 0xd9},
 395         {0x3781, 0x03},
 396         {0x3782, 0xf5},
 397         {0x3783, 0x06},
 398         {0x3784, 0xa5},
 399         {0x3788, 0x0f},
 400         {0x378a, 0xd9},
 401         {0x378b, 0x03},
 402         {0x378c, 0xeb},
 403         {0x378d, 0x05},
 404         {0x378e, 0x87},
 405         {0x378f, 0x06},
 406         {0x3790, 0xf5},
 407         {0x3792, 0x43},
 408         {0x3794, 0x7a},
 409         {0x3796, 0xa1},
 410         {0x3e04, 0x0e},
 411         {0x319e, 0x00},
 412         {0x3a00, 0x01},
 413         {0x3a18, 0xbf},
 414         {0x3a19, 0x00},
 415         {0x3a1a, 0x67},
 416         {0x3a1b, 0x00},
 417         {0x3a1c, 0x6f},
 418         {0x3a1d, 0x00},
 419         {0x3a1e, 0xd7},
 420         {0x3a1f, 0x01},
 421         {0x3a20, 0x6f},
 422         {0x3a21, 0x00},
 423         {0x3a22, 0xcf},
 424         {0x3a23, 0x00},
 425         {0x3a24, 0x6f},
 426         {0x3a25, 0x00},
 427         {0x3a26, 0xb7},
 428         {0x3a27, 0x00},
 429         {0x3a28, 0x5f},
 430         {0x3a29, 0x00},
 431 };
 432
 433 static const struct imx334_reg raw10_framefmt_regs[] = {
 434         {0x3050, 0x00},
 435         {0x319d, 0x00},
 436         {0x341c, 0xff},
 437         {0x341d, 0x01},
 438 };
 439
 440 static const struct imx334_reg raw12_framefmt_regs[] = {
 441         {0x3050, 0x01},
 442         {0x319d, 0x01},
 443         {0x341c, 0x47},
 444         {0x341d, 0x00},
 445 };
 446
 447 static const u32 imx334_mbus_codes[] = {
 448         MEDIA_BUS_FMT_SRGGB12_1X12,
 449         MEDIA_BUS_FMT_SRGGB10_1X10,
 450 };
 451
 452 /* Supported sensor mode configurations */
 453 static const struct imx334_mode supported_modes[] = {
 454         {
 455                 .width = 3840,
 456                 .height = 2160,
 457                 .hblank = 560,
 458                 .vblank = 2340,
 459                 .vblank_min = 90,
 460                 .vblank_max = 132840,
 461                 .pclk = 594000000,
 462                 .link_freq_idx = 0,
 463                 .reg_list = {
 464                         .num_of_regs = ARRAY_SIZE(mode_3840x2160_regs),
 465                         .regs = mode_3840x2160_regs,
 466                 },
 467         }, {
 468                 .width = 1920,
 469                 .height = 1080,
 470                 .hblank = 2480,
 471                 .vblank = 1170,
 472                 .vblank_min = 45,
 473                 .vblank_max = 132840,
 474                 .pclk = 297000000,
 475                 .link_freq_idx = 1,
 476                 .reg_list = {
 477                         .num_of_regs = ARRAY_SIZE(mode_1920x1080_regs),
 478                         .regs = mode_1920x1080_regs,
 479                 },
 480         },
 481 };
 482
 483 /**
 484  * to_imx334() - imv334 V4L2 sub-device to imx334 device.
 485  * @subdev: pointer to imx334 V4L2 sub-device
 486  *
 487  * Return: pointer to imx334 device
 488  */
 489 static inline struct imx334 *to_imx334(struct v4l2_subdev *subdev)
 490 {
 491         return container_of(subdev, struct imx334, sd);
 492 }
 493
 494 /**
 495  * imx334_read_reg() - Read registers.
 496  * @imx334: pointer to imx334 device
 497  * @reg: register address
 498  * @len: length of bytes to read. Max supported bytes is 4
 499  * @val: pointer to register value to be filled.
 500  *
 501  * Big endian register addresses with little endian values.
 502  *
 503  * Return: 0 if successful, error code otherwise.
 504  */
 505 static int imx334_read_reg(struct imx334 *imx334, u16 reg, u32 len, u32 *val)
 506 {
 507         struct i2c_client *client = v4l2_get_subdevdata(&imx334->sd);
 508         struct i2c_msg msgs[2] = {0};
 509         u8 addr_buf[2] = {0};
 510         u8 data_buf[4] = {0};
 511         int ret;
 512
 513         if (WARN_ON(len > 4))
 514                 return -EINVAL;
 515
 516         put_unaligned_be16(reg, addr_buf);
 517
 518         /* Write register address */
 519         msgs[0].addr = client->addr;
 520         msgs[0].flags = 0;
 521         msgs[0].len = ARRAY_SIZE(addr_buf);
 522         msgs[0].buf = addr_buf;
 523
 524         /* Read data from register */
 525         msgs[1].addr = client->addr;
 526         msgs[1].flags = I2C_M_RD;
 527         msgs[1].len = len;
 528         msgs[1].buf = data_buf;
 529
 530         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 531         if (ret != ARRAY_SIZE(msgs))
 532                 return -EIO;
 533
 534         *val = get_unaligned_le32(data_buf);
 535
 536         return 0;
 537 }
 538
 539 /**
 540  * imx334_write_reg() - Write register
 541  * @imx334: pointer to imx334 device
 542  * @reg: register address
 543  * @len: length of bytes. Max supported bytes is 4
 544  * @val: register value
 545  *
 546  * Big endian register addresses with little endian values.
 547  *
 548  * Return: 0 if successful, error code otherwise.
 549  */
 550 static int imx334_write_reg(struct imx334 *imx334, u16 reg, u32 len, u32 val)
 551 {
 552         struct i2c_client *client = v4l2_get_subdevdata(&imx334->sd);
 553         u8 buf[6] = {0};
 554
 555         if (WARN_ON(len > 4))
 556                 return -EINVAL;
 557
 558         put_unaligned_be16(reg, buf);
 559         put_unaligned_le32(val, buf + 2);
 560         if (i2c_master_send(client, buf, len + 2) != len + 2)
 561                 return -EIO;
 562
 563         return 0;
 564 }
 565
 566 /**
 567  * imx334_write_regs() - Write a list of registers
 568  * @imx334: pointer to imx334 device
 569  * @regs: list of registers to be written
 570  * @len: length of registers array
 571  *
 572  * Return: 0 if successful, error code otherwise.
 573  */
 574 static int imx334_write_regs(struct imx334 *imx334,
 575                              const struct imx334_reg *regs, u32 len)
 576 {
 577         unsigned int i;
 578         int ret;
 579
 580         for (i = 0; i < len; i++) {
 581                 ret = imx334_write_reg(imx334, regs[i].address, 1, regs[i].val);
 582                 if (ret)
 583                         return ret;
 584         }
 585
 586         return 0;
 587 }
 588
 589 /**
 590  * imx334_update_controls() - Update control ranges based on streaming mode
 591  * @imx334: pointer to imx334 device
 592  * @mode: pointer to imx334_mode sensor mode
 593  *
 594  * Return: 0 if successful, error code otherwise.
 595  */
 596 static int imx334_update_controls(struct imx334 *imx334,
 597                                   const struct imx334_mode *mode)
 598 {
 599         int ret;
 600
 601         ret = __v4l2_ctrl_s_ctrl(imx334->link_freq_ctrl, mode->link_freq_idx);
 602         if (ret)
 603                 return ret;
 604
 605         ret = __v4l2_ctrl_modify_range(imx334->pclk_ctrl, mode->pclk,
 606                                        mode->pclk, 1, mode->pclk);
 607         if (ret)
 608                 return ret;
 609
 610         ret = __v4l2_ctrl_modify_range(imx334->hblank_ctrl, mode->hblank,
 611                                        mode->hblank, 1, mode->hblank);
 612         if (ret)
 613                 return ret;
 614
 615         ret =  __v4l2_ctrl_modify_range(imx334->vblank_ctrl, mode->vblank_min,
 616                                         mode->vblank_max, 1, mode->vblank);
 617         if (ret)
 618                 return ret;
 619
 620         return __v4l2_ctrl_s_ctrl(imx334->vblank_ctrl, mode->vblank);
 621 }
 622
 623 /**
 624  * imx334_update_exp_gain() - Set updated exposure and gain
 625  * @imx334: pointer to imx334 device
 626  * @exposure: updated exposure value
 627  * @gain: updated analog gain value
 628  *
 629  * Return: 0 if successful, error code otherwise.
 630  */
 631 static int imx334_update_exp_gain(struct imx334 *imx334, u32 exposure, u32 gain)
 632 {
 633         u32 lpfr, shutter;
 634         int ret;
 635
 636         lpfr = imx334->vblank + imx334->cur_mode->height;
 637         shutter = lpfr - exposure;
 638
 639         dev_dbg(imx334->dev, "Set long exp %u analog gain %u sh0 %u lpfr %u",
 640                 exposure, gain, shutter, lpfr);
 641
 642         ret = imx334_write_reg(imx334, IMX334_REG_HOLD, 1, 1);
 643         if (ret)
 644                 return ret;
 645
 646         ret = imx334_write_reg(imx334, IMX334_REG_LPFR, 3, lpfr);
 647         if (ret)
 648                 goto error_release_group_hold;
 649
 650         ret = imx334_write_reg(imx334, IMX334_REG_SHUTTER, 3, shutter);
 651         if (ret)
 652                 goto error_release_group_hold;
 653
 654         ret = imx334_write_reg(imx334, IMX334_REG_AGAIN, 1, gain);
 655
 656 error_release_group_hold:
 657         imx334_write_reg(imx334, IMX334_REG_HOLD, 1, 0);
 658
 659         return ret;
 660 }
 661
 662 /**
 663  * imx334_set_ctrl() - Set subdevice control
 664  * @ctrl: pointer to v4l2_ctrl structure
 665  *
 666  * Supported controls:
 667  * - V4L2_CID_VBLANK
 668  * - cluster controls:
 669  *   - V4L2_CID_ANALOGUE_GAIN
 670  *   - V4L2_CID_EXPOSURE
 671  *
 672  * Return: 0 if successful, error code otherwise.
 673  */
 674 static int imx334_set_ctrl(struct v4l2_ctrl *ctrl)
 675 {
 676         struct imx334 *imx334 =
 677                 container_of(ctrl->handler, struct imx334, ctrl_handler);
 678         u32 analog_gain;
 679         u32 exposure;
 680         int ret;
 681
 682         switch (ctrl->id) {
 683         case V4L2_CID_VBLANK:
 684                 imx334->vblank = imx334->vblank_ctrl->val;
 685
 686                 dev_dbg(imx334->dev, "Received vblank %u, new lpfr %u",
 687                         imx334->vblank,
 688                         imx334->vblank + imx334->cur_mode->height);
 689
 690                 ret = __v4l2_ctrl_modify_range(imx334->exp_ctrl,
 691                                                IMX334_EXPOSURE_MIN,
 692                                                imx334->vblank +
 693                                                imx334->cur_mode->height -
 694                                                IMX334_EXPOSURE_OFFSET,
 695                                                1, IMX334_EXPOSURE_DEFAULT);
 696                 break;
 697         case V4L2_CID_EXPOSURE:
 698
 699                 /* Set controls only if sensor is in power on state */
 700                 if (!pm_runtime_get_if_in_use(imx334->dev))
 701                         return 0;
 702
 703                 exposure = ctrl->val;
 704                 analog_gain = imx334->again_ctrl->val;
 705
 706                 dev_dbg(imx334->dev, "Received exp %u analog gain %u",
 707                         exposure, analog_gain);
 708
 709                 ret = imx334_update_exp_gain(imx334, exposure, analog_gain);
 710
 711                 pm_runtime_put(imx334->dev);
 712
 713                 break;
 714         case V4L2_CID_PIXEL_RATE:
 715         case V4L2_CID_LINK_FREQ:
 716         case V4L2_CID_HBLANK:
 717                 ret = 0;
 718                 break;
 719         default:
 720                 dev_err(imx334->dev, "Invalid control %d", ctrl->id);
 721                 ret = -EINVAL;
 722         }
 723
 724         return ret;
 725 }
 726
 727 /* V4l2 subdevice control ops*/
 728 static const struct v4l2_ctrl_ops imx334_ctrl_ops = {
 729         .s_ctrl = imx334_set_ctrl,
 730 };
 731
 732 static int imx334_get_format_code(struct imx334 *imx334, u32 code)
 733 {
 734         unsigned int i;
 735
 736         for (i = 0; i < ARRAY_SIZE(imx334_mbus_codes); i++) {
 737                 if (imx334_mbus_codes[i] == code)
 738                         return imx334_mbus_codes[i];
 739         }
 740
 741         return imx334_mbus_codes[0];
 742 }
 743
 744 /**
 745  * imx334_enum_mbus_code() - Enumerate V4L2 sub-device mbus codes
 746  * @sd: pointer to imx334 V4L2 sub-device structure
 747  * @sd_state: V4L2 sub-device state
 748  * @code: V4L2 sub-device code enumeration need to be filled
 749  *
 750  * Return: 0 if successful, error code otherwise.
 751  */
 752 static int imx334_enum_mbus_code(struct v4l2_subdev *sd,
 753                                  struct v4l2_subdev_state *sd_state,
 754                                  struct v4l2_subdev_mbus_code_enum *code)
 755 {
 756         if (code->index >= ARRAY_SIZE(imx334_mbus_codes))
 757                 return -EINVAL;
 758
 759         code->code = imx334_mbus_codes[code->index];
 760
 761         return 0;
 762 }
 763
 764 /**
 765  * imx334_enum_frame_size() - Enumerate V4L2 sub-device frame sizes
 766  * @sd: pointer to imx334 V4L2 sub-device structure
 767  * @sd_state: V4L2 sub-device state
 768  * @fsize: V4L2 sub-device size enumeration need to be filled
 769  *
 770  * Return: 0 if successful, error code otherwise.
 771  */
 772 static int imx334_enum_frame_size(struct v4l2_subdev *sd,
 773                                   struct v4l2_subdev_state *sd_state,
 774                                   struct v4l2_subdev_frame_size_enum *fsize)
 775 {
 776         struct imx334 *imx334 = to_imx334(sd);
 777         u32 code;
 778
 779         if (fsize->index >= ARRAY_SIZE(supported_modes))
 780                 return -EINVAL;
 781
 782         code = imx334_get_format_code(imx334, fsize->code);
 783
 784         if (fsize->code != code)
 785                 return -EINVAL;
 786
 787         fsize->min_width = supported_modes[fsize->index].width;
 788         fsize->max_width = fsize->min_width;
 789         fsize->min_height = supported_modes[fsize->index].height;
 790         fsize->max_height = fsize->min_height;
 791
 792         return 0;
 793 }
 794
 795 /**
 796  * imx334_fill_pad_format() - Fill subdevice pad format
 797  *                            from selected sensor mode
 798  * @imx334: pointer to imx334 device
 799  * @mode: pointer to imx334_mode sensor mode
 800  * @fmt: V4L2 sub-device format need to be filled
 801  */
 802 static void imx334_fill_pad_format(struct imx334 *imx334,
 803                                    const struct imx334_mode *mode,
 804                                    struct v4l2_subdev_format *fmt)
 805 {
 806         fmt->format.width = mode->width;
 807         fmt->format.height = mode->height;
 808         fmt->format.field = V4L2_FIELD_NONE;
 809         fmt->format.colorspace = V4L2_COLORSPACE_RAW;
 810         fmt->format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
 811         fmt->format.quantization = V4L2_QUANTIZATION_DEFAULT;
 812         fmt->format.xfer_func = V4L2_XFER_FUNC_NONE;
 813 }
 814
 815 /**
 816  * imx334_get_pad_format() - Get subdevice pad format
 817  * @sd: pointer to imx334 V4L2 sub-device structure
 818  * @sd_state: V4L2 sub-device state
 819  * @fmt: V4L2 sub-device format need to be set
 820  *
 821  * Return: 0 if successful, error code otherwise.
 822  */
 823 static int imx334_get_pad_format(struct v4l2_subdev *sd,
 824                                  struct v4l2_subdev_state *sd_state,
 825                                  struct v4l2_subdev_format *fmt)
 826 {
 827         struct imx334 *imx334 = to_imx334(sd);
 828
 829         mutex_lock(&imx334->mutex);
 830
 831         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 832                 struct v4l2_mbus_framefmt *framefmt;
 833
 834                 framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
 835                 fmt->format = *framefmt;
 836         } else {
 837                 fmt->format.code = imx334->cur_code;
 838                 imx334_fill_pad_format(imx334, imx334->cur_mode, fmt);
 839         }
 840
 841         mutex_unlock(&imx334->mutex);
 842
 843         return 0;
 844 }
 845
 846 /**
 847  * imx334_set_pad_format() - Set subdevice pad format
 848  * @sd: pointer to imx334 V4L2 sub-device structure
 849  * @sd_state: V4L2 sub-device state
 850  * @fmt: V4L2 sub-device format need to be set
 851  *
 852  * Return: 0 if successful, error code otherwise.
 853  */
 854 static int imx334_set_pad_format(struct v4l2_subdev *sd,
 855                                  struct v4l2_subdev_state *sd_state,
 856                                  struct v4l2_subdev_format *fmt)
 857 {
 858         struct imx334 *imx334 = to_imx334(sd);
 859         const struct imx334_mode *mode;
 860         int ret = 0;
 861
 862         mutex_lock(&imx334->mutex);
 863
 864         mode = v4l2_find_nearest_size(supported_modes,
 865                                       ARRAY_SIZE(supported_modes),
 866                                       width, height,
 867                                       fmt->format.width, fmt->format.height);
 868
 869         imx334_fill_pad_format(imx334, mode, fmt);
 870         fmt->format.code = imx334_get_format_code(imx334, fmt->format.code);
 871
 872         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 873                 struct v4l2_mbus_framefmt *framefmt;
 874
 875                 framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
 876                 *framefmt = fmt->format;
 877         } else if (imx334->cur_mode != mode || imx334->cur_code != fmt->format.code) {
 878                 imx334->cur_code = fmt->format.code;
 879                 ret = imx334_update_controls(imx334, mode);
 880                 if (!ret)
 881                         imx334->cur_mode = mode;
 882         }
 883
 884         mutex_unlock(&imx334->mutex);
 885
 886         return ret;
 887 }
 888
 889 /**
 890  * imx334_init_pad_cfg() - Initialize sub-device pad configuration
 891  * @sd: pointer to imx334 V4L2 sub-device structure
 892  * @sd_state: V4L2 sub-device state
 893  *
 894  * Return: 0 if successful, error code otherwise.
 895  */
 896 static int imx334_init_pad_cfg(struct v4l2_subdev *sd,
 897                                struct v4l2_subdev_state *sd_state)
 898 {
 899         struct imx334 *imx334 = to_imx334(sd);
 900         struct v4l2_subdev_format fmt = { 0 };
 901
 902         fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 903
 904         mutex_lock(&imx334->mutex);
 905
 906         imx334_fill_pad_format(imx334, imx334->cur_mode, &fmt);
 907
 908         __v4l2_ctrl_modify_range(imx334->link_freq_ctrl, 0,
 909                                  __fls(imx334->menu_skip_mask),
 910                                  ~(imx334->menu_skip_mask),
 911                                  __ffs(imx334->menu_skip_mask));
 912
 913         mutex_unlock(&imx334->mutex);
 914
 915         return imx334_set_pad_format(sd, sd_state, &fmt);
 916 }
 917
 918 static int imx334_set_framefmt(struct imx334 *imx334)
 919 {
 920         switch (imx334->cur_code) {
 921         case MEDIA_BUS_FMT_SRGGB10_1X10:
 922                 return imx334_write_regs(imx334, raw10_framefmt_regs,
 923                                          ARRAY_SIZE(raw10_framefmt_regs));
 924
 925         case MEDIA_BUS_FMT_SRGGB12_1X12:
 926                 return imx334_write_regs(imx334, raw12_framefmt_regs,
 927                                          ARRAY_SIZE(raw12_framefmt_regs));
 928         }
 929
 930         return -EINVAL;
 931 }
 932
 933 /**
 934  * imx334_start_streaming() - Start sensor stream
 935  * @imx334: pointer to imx334 device
 936  *
 937  * Return: 0 if successful, error code otherwise.
 938  */
 939 static int imx334_start_streaming(struct imx334 *imx334)
 940 {
 941         const struct imx334_reg_list *reg_list;
 942         int ret;
 943
 944         /* Write sensor mode registers */
 945         reg_list = &imx334->cur_mode->reg_list;
 946         ret = imx334_write_regs(imx334, reg_list->regs,
 947                                 reg_list->num_of_regs);
 948         if (ret) {
 949                 dev_err(imx334->dev, "fail to write initial registers");
 950                 return ret;
 951         }
 952
 953         ret = imx334_set_framefmt(imx334);
 954         if (ret) {
 955                 dev_err(imx334->dev, "%s failed to set frame format: %d\n",
 956                         __func__, ret);
 957                 return ret;
 958         }
 959
 960         /* Setup handler will write actual exposure and gain */
 961         ret =  __v4l2_ctrl_handler_setup(imx334->sd.ctrl_handler);
 962         if (ret) {
 963                 dev_err(imx334->dev, "fail to setup handler");
 964                 return ret;
 965         }
 966
 967         /* Start streaming */
 968         ret = imx334_write_reg(imx334, IMX334_REG_MODE_SELECT,
 969                                1, IMX334_MODE_STREAMING);
 970         if (ret) {
 971                 dev_err(imx334->dev, "fail to start streaming");
 972                 return ret;
 973         }
 974
 975         return 0;
 976 }
 977
 978 /**
 979  * imx334_stop_streaming() - Stop sensor stream
 980  * @imx334: pointer to imx334 device
 981  *
 982  * Return: 0 if successful, error code otherwise.
 983  */
 984 static int imx334_stop_streaming(struct imx334 *imx334)
 985 {
 986         return imx334_write_reg(imx334, IMX334_REG_MODE_SELECT,
 987                                 1, IMX334_MODE_STANDBY);
 988 }
 989
 990 /**
 991  * imx334_set_stream() - Enable sensor streaming
 992  * @sd: pointer to imx334 subdevice
 993  * @enable: set to enable sensor streaming
 994  *
 995  * Return: 0 if successful, error code otherwise.
 996  */
 997 static int imx334_set_stream(struct v4l2_subdev *sd, int enable)
 998 {
 999         struct imx334 *imx334 = to_imx334(sd);
1000         int ret;
1001
1002         mutex_lock(&imx334->mutex);
1003
1004         if (imx334->streaming == enable) {
1005                 mutex_unlock(&imx334->mutex);
1006                 return 0;
1007         }
1008
1009         if (enable) {
1010                 ret = pm_runtime_resume_and_get(imx334->dev);
1011                 if (ret < 0)
1012                         goto error_unlock;
1013
1014                 ret = imx334_start_streaming(imx334);
1015                 if (ret)
1016                         goto error_power_off;
1017         } else {
1018                 imx334_stop_streaming(imx334);
1019                 pm_runtime_put(imx334->dev);
1020         }
1021
1022         imx334->streaming = enable;
1023
1024         mutex_unlock(&imx334->mutex);
1025
1026         return 0;
1027
1028 error_power_off:
1029         pm_runtime_put(imx334->dev);
1030 error_unlock:
1031         mutex_unlock(&imx334->mutex);
1032
1033         return ret;
1034 }
1035
1036 /**
1037  * imx334_detect() - Detect imx334 sensor
1038  * @imx334: pointer to imx334 device
1039  *
1040  * Return: 0 if successful, -EIO if sensor id does not match
1041  */
1042 static int imx334_detect(struct imx334 *imx334)
1043 {
1044         int ret;
1045         u32 val;
1046
1047         ret = imx334_read_reg(imx334, IMX334_REG_ID, 2, &val);
1048         if (ret)
1049                 return ret;
1050
1051         if (val != IMX334_ID) {
1052                 dev_err(imx334->dev, "chip id mismatch: %x!=%x",
1053                         IMX334_ID, val);
1054                 return -ENXIO;
1055         }
1056
1057         return 0;
1058 }
1059
1060 /**
1061  * imx334_parse_hw_config() - Parse HW configuration and check if supported
1062  * @imx334: pointer to imx334 device
1063  *
1064  * Return: 0 if successful, error code otherwise.
1065  */
1066 static int imx334_parse_hw_config(struct imx334 *imx334)
1067 {
1068         struct fwnode_handle *fwnode = dev_fwnode(imx334->dev);
1069         struct v4l2_fwnode_endpoint bus_cfg = {
1070                 .bus_type = V4L2_MBUS_CSI2_DPHY
1071         };
1072         struct fwnode_handle *ep;
1073         unsigned long rate;
1074         unsigned int i, j;
1075         int ret;
1076
1077         if (!fwnode)
1078                 return -ENXIO;
1079
1080         /* Request optional reset pin */
1081         imx334->reset_gpio = devm_gpiod_get_optional(imx334->dev, "reset",
1082                                                      GPIOD_OUT_LOW);
1083         if (IS_ERR(imx334->reset_gpio)) {
1084                 dev_err(imx334->dev, "failed to get reset gpio %ld",
1085                         PTR_ERR(imx334->reset_gpio));
1086                 return PTR_ERR(imx334->reset_gpio);
1087         }
1088
1089         /* Get sensor input clock */
1090         imx334->inclk = devm_clk_get(imx334->dev, NULL);
1091         if (IS_ERR(imx334->inclk)) {
1092                 dev_err(imx334->dev, "could not get inclk");
1093                 return PTR_ERR(imx334->inclk);
1094         }
1095
1096         rate = clk_get_rate(imx334->inclk);
1097         if (rate != IMX334_INCLK_RATE) {
1098                 dev_err(imx334->dev, "inclk frequency mismatch");
1099                 return -EINVAL;
1100         }
1101
1102         ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
1103         if (!ep)
1104                 return -ENXIO;
1105
1106         ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
1107         fwnode_handle_put(ep);
1108         if (ret)
1109                 return ret;
1110
1111         if (bus_cfg.bus.mipi_csi2.num_data_lanes != IMX334_NUM_DATA_LANES) {
1112                 dev_err(imx334->dev,
1113                         "number of CSI2 data lanes %d is not supported",
1114                         bus_cfg.bus.mipi_csi2.num_data_lanes);
1115                 ret = -EINVAL;
1116                 goto done_endpoint_free;
1117         }
1118
1119         if (!bus_cfg.nr_of_link_frequencies) {
1120                 dev_err(imx334->dev, "no link frequencies defined");
1121                 ret = -EINVAL;
1122                 goto done_endpoint_free;
1123         }
1124
1125         for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) {
1126                 for (j = 0; j < ARRAY_SIZE(link_freq); j++) {
1127                         if (bus_cfg.link_frequencies[i] == link_freq[j]) {
1128                                 set_bit(j, &imx334->menu_skip_mask);
1129                                 break;
1130                         }
1131                 }
1132
1133                 if (j == ARRAY_SIZE(link_freq)) {
1134                         ret = dev_err_probe(imx334->dev, -EINVAL,
1135                                             "no supported link freq found\n");
1136                         goto done_endpoint_free;
1137                 }
1138         }
1139
1140 done_endpoint_free:
1141         v4l2_fwnode_endpoint_free(&bus_cfg);
1142
1143         return ret;
1144 }
1145
1146 /* V4l2 subdevice ops */
1147 static const struct v4l2_subdev_video_ops imx334_video_ops = {
1148         .s_stream = imx334_set_stream,
1149 };
1150
1151 static const struct v4l2_subdev_pad_ops imx334_pad_ops = {
1152         .init_cfg = imx334_init_pad_cfg,
1153         .enum_mbus_code = imx334_enum_mbus_code,
1154         .enum_frame_size = imx334_enum_frame_size,
1155         .get_fmt = imx334_get_pad_format,
1156         .set_fmt = imx334_set_pad_format,
1157 };
1158
1159 static const struct v4l2_subdev_ops imx334_subdev_ops = {
1160         .video = &imx334_video_ops,
1161         .pad = &imx334_pad_ops,
1162 };
1163
1164 /**
1165  * imx334_power_on() - Sensor power on sequence
1166  * @dev: pointer to i2c device
1167  *
1168  * Return: 0 if successful, error code otherwise.
1169  */
1170 static int imx334_power_on(struct device *dev)
1171 {
1172         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1173         struct imx334 *imx334 = to_imx334(sd);
1174         int ret;
1175
1176         gpiod_set_value_cansleep(imx334->reset_gpio, 1);
1177
1178         ret = clk_prepare_enable(imx334->inclk);
1179         if (ret) {
1180                 dev_err(imx334->dev, "fail to enable inclk");
1181                 goto error_reset;
1182         }
1183
1184         usleep_range(18000, 20000);
1185
1186         return 0;
1187
1188 error_reset:
1189         gpiod_set_value_cansleep(imx334->reset_gpio, 0);
1190
1191         return ret;
1192 }
1193
1194 /**
1195  * imx334_power_off() - Sensor power off sequence
1196  * @dev: pointer to i2c device
1197  *
1198  * Return: 0 if successful, error code otherwise.
1199  */
1200 static int imx334_power_off(struct device *dev)
1201 {
1202         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1203         struct imx334 *imx334 = to_imx334(sd);
1204
1205         gpiod_set_value_cansleep(imx334->reset_gpio, 0);
1206
1207         clk_disable_unprepare(imx334->inclk);
1208
1209         return 0;
1210 }
1211
1212 /**
1213  * imx334_init_controls() - Initialize sensor subdevice controls
1214  * @imx334: pointer to imx334 device
1215  *
1216  * Return: 0 if successful, error code otherwise.
1217  */
1218 static int imx334_init_controls(struct imx334 *imx334)
1219 {
1220         struct v4l2_ctrl_handler *ctrl_hdlr = &imx334->ctrl_handler;
1221         const struct imx334_mode *mode = imx334->cur_mode;
1222         u32 lpfr;
1223         int ret;
1224
1225         ret = v4l2_ctrl_handler_init(ctrl_hdlr, 6);
1226         if (ret)
1227                 return ret;
1228
1229         /* Serialize controls with sensor device */
1230         ctrl_hdlr->lock = &imx334->mutex;
1231
1232         /* Initialize exposure and gain */
1233         lpfr = mode->vblank + mode->height;
1234         imx334->exp_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1235                                              &imx334_ctrl_ops,
1236                                              V4L2_CID_EXPOSURE,
1237                                              IMX334_EXPOSURE_MIN,
1238                                              lpfr - IMX334_EXPOSURE_OFFSET,
1239                                              IMX334_EXPOSURE_STEP,
1240                                              IMX334_EXPOSURE_DEFAULT);
1241
1242         imx334->again_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1243                                                &imx334_ctrl_ops,
1244                                                V4L2_CID_ANALOGUE_GAIN,
1245                                                IMX334_AGAIN_MIN,
1246                                                IMX334_AGAIN_MAX,
1247                                                IMX334_AGAIN_STEP,
1248                                                IMX334_AGAIN_DEFAULT);
1249
1250         v4l2_ctrl_cluster(2, &imx334->exp_ctrl);
1251
1252         imx334->vblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1253                                                 &imx334_ctrl_ops,
1254                                                 V4L2_CID_VBLANK,
1255                                                 mode->vblank_min,
1256                                                 mode->vblank_max,
1257                                                 1, mode->vblank);
1258
1259         /* Read only controls */
1260         imx334->pclk_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1261                                               &imx334_ctrl_ops,
1262                                               V4L2_CID_PIXEL_RATE,
1263                                               mode->pclk, mode->pclk,
1264                                               1, mode->pclk);
1265
1266         imx334->link_freq_ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr,
1267                                                         &imx334_ctrl_ops,
1268                                                         V4L2_CID_LINK_FREQ,
1269                                                         __fls(imx334->menu_skip_mask),
1270                                                         __ffs(imx334->menu_skip_mask),
1271                                                         link_freq);
1272
1273         if (imx334->link_freq_ctrl)
1274                 imx334->link_freq_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1275
1276         imx334->hblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1277                                                 &imx334_ctrl_ops,
1278                                                 V4L2_CID_HBLANK,
1279                                                 IMX334_REG_MIN,
1280                                                 IMX334_REG_MAX,
1281                                                 1, mode->hblank);
1282         if (imx334->hblank_ctrl)
1283                 imx334->hblank_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1284
1285         if (ctrl_hdlr->error) {
1286                 dev_err(imx334->dev, "control init failed: %d",
1287                         ctrl_hdlr->error);
1288                 v4l2_ctrl_handler_free(ctrl_hdlr);
1289                 return ctrl_hdlr->error;
1290         }
1291
1292         imx334->sd.ctrl_handler = ctrl_hdlr;
1293
1294         return 0;
1295 }
1296
1297 /**
1298  * imx334_probe() - I2C client device binding
1299  * @client: pointer to i2c client device
1300  *
1301  * Return: 0 if successful, error code otherwise.
1302  */
1303 static int imx334_probe(struct i2c_client *client)
1304 {
1305         struct imx334 *imx334;
1306         int ret;
1307
1308         imx334 = devm_kzalloc(&client->dev, sizeof(*imx334), GFP_KERNEL);
1309         if (!imx334)
1310                 return -ENOMEM;
1311
1312         imx334->dev = &client->dev;
1313
1314         /* Initialize subdev */
1315         v4l2_i2c_subdev_init(&imx334->sd, client, &imx334_subdev_ops);
1316
1317         ret = imx334_parse_hw_config(imx334);
1318         if (ret) {
1319                 dev_err(imx334->dev, "HW configuration is not supported");
1320                 return ret;
1321         }
1322
1323         mutex_init(&imx334->mutex);
1324
1325         ret = imx334_power_on(imx334->dev);
1326         if (ret) {
1327                 dev_err(imx334->dev, "failed to power-on the sensor");
1328                 goto error_mutex_destroy;
1329         }
1330
1331         /* Check module identity */
1332         ret = imx334_detect(imx334);
1333         if (ret) {
1334                 dev_err(imx334->dev, "failed to find sensor: %d", ret);
1335                 goto error_power_off;
1336         }
1337
1338         /* Set default mode to max resolution */
1339         imx334->cur_mode = &supported_modes[__ffs(imx334->menu_skip_mask)];
1340         imx334->cur_code = imx334_mbus_codes[0];
1341         imx334->vblank = imx334->cur_mode->vblank;
1342
1343         ret = imx334_init_controls(imx334);
1344         if (ret) {
1345                 dev_err(imx334->dev, "failed to init controls: %d", ret);
1346                 goto error_power_off;
1347         }
1348
1349         /* Initialize subdev */
1350         imx334->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1351         imx334->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1352
1353         /* Initialize source pad */
1354         imx334->pad.flags = MEDIA_PAD_FL_SOURCE;
1355         ret = media_entity_pads_init(&imx334->sd.entity, 1, &imx334->pad);
1356         if (ret) {
1357                 dev_err(imx334->dev, "failed to init entity pads: %d", ret);
1358                 goto error_handler_free;
1359         }
1360
1361         ret = v4l2_async_register_subdev_sensor(&imx334->sd);
1362         if (ret < 0) {
1363                 dev_err(imx334->dev,
1364                         "failed to register async subdev: %d", ret);
1365                 goto error_media_entity;
1366         }
1367
1368         pm_runtime_set_active(imx334->dev);
1369         pm_runtime_enable(imx334->dev);
1370         pm_runtime_idle(imx334->dev);
1371
1372         return 0;
1373
1374 error_media_entity:
1375         media_entity_cleanup(&imx334->sd.entity);
1376 error_handler_free:
1377         v4l2_ctrl_handler_free(imx334->sd.ctrl_handler);
1378 error_power_off:
1379         imx334_power_off(imx334->dev);
1380 error_mutex_destroy:
1381         mutex_destroy(&imx334->mutex);
1382
1383         return ret;
1384 }
1385
1386 /**
1387  * imx334_remove() - I2C client device unbinding
1388  * @client: pointer to I2C client device
1389  *
1390  * Return: 0 if successful, error code otherwise.
1391  */
1392 static void imx334_remove(struct i2c_client *client)
1393 {
1394         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1395         struct imx334 *imx334 = to_imx334(sd);
1396
1397         v4l2_async_unregister_subdev(sd);
1398         media_entity_cleanup(&sd->entity);
1399         v4l2_ctrl_handler_free(sd->ctrl_handler);
1400
1401         pm_runtime_disable(&client->dev);
1402         pm_runtime_suspended(&client->dev);
1403
1404         mutex_destroy(&imx334->mutex);
1405 }
1406
1407 static const struct dev_pm_ops imx334_pm_ops = {
1408         SET_RUNTIME_PM_OPS(imx334_power_off, imx334_power_on, NULL)
1409 };
1410
1411 static const struct of_device_id imx334_of_match[] = {
1412         { .compatible = "sony,imx334" },
1413         { }
1414 };
1415
1416 MODULE_DEVICE_TABLE(of, imx334_of_match);
1417
1418 static struct i2c_driver imx334_driver = {
1419         .probe = imx334_probe,
1420         .remove = imx334_remove,
1421         .driver = {
1422                 .name = "imx334",
1423                 .pm = &imx334_pm_ops,
1424                 .of_match_table = imx334_of_match,
1425         },
1426 };
1427
1428 module_i2c_driver(imx334_driver);
1429
1430 MODULE_DESCRIPTION("Sony imx334 sensor driver");
1431 MODULE_LICENSE("GPL");