drivers/media/i2c/hi556.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (c) 2019 Intel Corporation.
   3
   4 #include <asm/unaligned.h>
   5 #include <linux/acpi.h>
   6 #include <linux/delay.h>
   7 #include <linux/i2c.h>
   8 #include <linux/module.h>
   9 #include <linux/pm_runtime.h>
  10 #include <media/v4l2-ctrls.h>
  11 #include <media/v4l2-device.h>
  12 #include <media/v4l2-fwnode.h>
  13
  14 #define HI556_REG_VALUE_08BIT           1
  15 #define HI556_REG_VALUE_16BIT           2
  16 #define HI556_REG_VALUE_24BIT           3
  17
  18 #define HI556_LINK_FREQ_437MHZ          437000000ULL
  19 #define HI556_MCLK                      19200000
  20 #define HI556_DATA_LANES                2
  21 #define HI556_RGB_DEPTH                 10
  22
  23 #define HI556_REG_CHIP_ID               0x0f16
  24 #define HI556_CHIP_ID                   0x0556
  25
  26 #define HI556_REG_MODE_SELECT           0x0a00
  27 #define HI556_MODE_STANDBY              0x0000
  28 #define HI556_MODE_STREAMING            0x0100
  29
  30 /* vertical-timings from sensor */
  31 #define HI556_REG_FLL                   0x0006
  32 #define HI556_FLL_30FPS                 0x0814
  33 #define HI556_FLL_30FPS_MIN             0x0814
  34 #define HI556_FLL_MAX                   0x7fff
  35
  36 /* horizontal-timings from sensor */
  37 #define HI556_REG_LLP                   0x0008
  38
  39 /* Exposure controls from sensor */
  40 #define HI556_REG_EXPOSURE              0x0074
  41 #define HI556_EXPOSURE_MIN              6
  42 #define HI556_EXPOSURE_MAX_MARGIN       2
  43 #define HI556_EXPOSURE_STEP             1
  44
  45 /* Analog gain controls from sensor */
  46 #define HI556_REG_ANALOG_GAIN           0x0077
  47 #define HI556_ANAL_GAIN_MIN             0
  48 #define HI556_ANAL_GAIN_MAX             240
  49 #define HI556_ANAL_GAIN_STEP            1
  50
  51 /* Digital gain controls from sensor */
  52 #define HI556_REG_MWB_GR_GAIN           0x0078
  53 #define HI556_REG_MWB_GB_GAIN           0x007a
  54 #define HI556_REG_MWB_R_GAIN            0x007c
  55 #define HI556_REG_MWB_B_GAIN            0x007e
  56 #define HI556_DGTL_GAIN_MIN             0
  57 #define HI556_DGTL_GAIN_MAX             2048
  58 #define HI556_DGTL_GAIN_STEP            1
  59 #define HI556_DGTL_GAIN_DEFAULT         256
  60
  61 /* Test Pattern Control */
  62 #define HI556_REG_ISP                   0X0a05
  63 #define HI556_REG_ISP_TPG_EN            0x01
  64 #define HI556_REG_TEST_PATTERN          0x0201
  65
  66 /* HI556 native and active pixel array size. */
  67 #define HI556_NATIVE_WIDTH              2592U
  68 #define HI556_NATIVE_HEIGHT             1944U
  69 #define HI556_PIXEL_ARRAY_LEFT          0U
  70 #define HI556_PIXEL_ARRAY_TOP           0U
  71 #define HI556_PIXEL_ARRAY_WIDTH 2592U
  72 #define HI556_PIXEL_ARRAY_HEIGHT        1944U
  73
  74 enum {
  75         HI556_LINK_FREQ_437MHZ_INDEX,
  76 };
  77
  78 struct hi556_reg {
  79         u16 address;
  80         u16 val;
  81 };
  82
  83 struct hi556_reg_list {
  84         u32 num_of_regs;
  85         const struct hi556_reg *regs;
  86 };
  87
  88 struct hi556_link_freq_config {
  89         const struct hi556_reg_list reg_list;
  90 };
  91
  92 struct hi556_mode {
  93         /* Frame width in pixels */
  94         u32 width;
  95
  96         /* Frame height in pixels */
  97         u32 height;
  98
  99         /* Analog crop rectangle. */
 100         struct v4l2_rect crop;
 101
 102         /* Horizontal timining size */
 103         u32 llp;
 104
 105         /* Default vertical timining size */
 106         u32 fll_def;
 107
 108         /* Min vertical timining size */
 109         u32 fll_min;
 110
 111         /* Link frequency needed for this resolution */
 112         u32 link_freq_index;
 113
 114         /* Sensor register settings for this resolution */
 115         const struct hi556_reg_list reg_list;
 116 };
 117
 118 #define to_hi556(_sd) container_of(_sd, struct hi556, sd)
 119
 120 //SENSOR_INITIALIZATION
 121 static const struct hi556_reg mipi_data_rate_874mbps[] = {
 122         {0x0e00, 0x0102},
 123         {0x0e02, 0x0102},
 124         {0x0e0c, 0x0100},
 125         {0x2000, 0x7400},
 126         {0x2002, 0x001c},
 127         {0x2004, 0x0242},
 128         {0x2006, 0x0942},
 129         {0x2008, 0x7007},
 130         {0x200a, 0x0fd9},
 131         {0x200c, 0x0259},
 132         {0x200e, 0x7008},
 133         {0x2010, 0x160e},
 134         {0x2012, 0x0047},
 135         {0x2014, 0x2118},
 136         {0x2016, 0x0041},
 137         {0x2018, 0x00d8},
 138         {0x201a, 0x0145},
 139         {0x201c, 0x0006},
 140         {0x201e, 0x0181},
 141         {0x2020, 0x13cc},
 142         {0x2022, 0x2057},
 143         {0x2024, 0x7001},
 144         {0x2026, 0x0fca},
 145         {0x2028, 0x00cb},
 146         {0x202a, 0x009f},
 147         {0x202c, 0x7002},
 148         {0x202e, 0x13cc},
 149         {0x2030, 0x019b},
 150         {0x2032, 0x014d},
 151         {0x2034, 0x2987},
 152         {0x2036, 0x2766},
 153         {0x2038, 0x0020},
 154         {0x203a, 0x2060},
 155         {0x203c, 0x0e5d},
 156         {0x203e, 0x181d},
 157         {0x2040, 0x2066},
 158         {0x2042, 0x20c4},
 159         {0x2044, 0x5000},
 160         {0x2046, 0x0005},
 161         {0x2048, 0x0000},
 162         {0x204a, 0x01db},
 163         {0x204c, 0x025a},
 164         {0x204e, 0x00c0},
 165         {0x2050, 0x0005},
 166         {0x2052, 0x0006},
 167         {0x2054, 0x0ad9},
 168         {0x2056, 0x0259},
 169         {0x2058, 0x0618},
 170         {0x205a, 0x0258},
 171         {0x205c, 0x2266},
 172         {0x205e, 0x20c8},
 173         {0x2060, 0x2060},
 174         {0x2062, 0x707b},
 175         {0x2064, 0x0fdd},
 176         {0x2066, 0x81b8},
 177         {0x2068, 0x5040},
 178         {0x206a, 0x0020},
 179         {0x206c, 0x5060},
 180         {0x206e, 0x3143},
 181         {0x2070, 0x5081},
 182         {0x2072, 0x025c},
 183         {0x2074, 0x7800},
 184         {0x2076, 0x7400},
 185         {0x2078, 0x001c},
 186         {0x207a, 0x0242},
 187         {0x207c, 0x0942},
 188         {0x207e, 0x0bd9},
 189         {0x2080, 0x0259},
 190         {0x2082, 0x7008},
 191         {0x2084, 0x160e},
 192         {0x2086, 0x0047},
 193         {0x2088, 0x2118},
 194         {0x208a, 0x0041},
 195         {0x208c, 0x00d8},
 196         {0x208e, 0x0145},
 197         {0x2090, 0x0006},
 198         {0x2092, 0x0181},
 199         {0x2094, 0x13cc},
 200         {0x2096, 0x2057},
 201         {0x2098, 0x7001},
 202         {0x209a, 0x0fca},
 203         {0x209c, 0x00cb},
 204         {0x209e, 0x009f},
 205         {0x20a0, 0x7002},
 206         {0x20a2, 0x13cc},
 207         {0x20a4, 0x019b},
 208         {0x20a6, 0x014d},
 209         {0x20a8, 0x2987},
 210         {0x20aa, 0x2766},
 211         {0x20ac, 0x0020},
 212         {0x20ae, 0x2060},
 213         {0x20b0, 0x0e5d},
 214         {0x20b2, 0x181d},
 215         {0x20b4, 0x2066},
 216         {0x20b6, 0x20c4},
 217         {0x20b8, 0x50a0},
 218         {0x20ba, 0x0005},
 219         {0x20bc, 0x0000},
 220         {0x20be, 0x01db},
 221         {0x20c0, 0x025a},
 222         {0x20c2, 0x00c0},
 223         {0x20c4, 0x0005},
 224         {0x20c6, 0x0006},
 225         {0x20c8, 0x0ad9},
 226         {0x20ca, 0x0259},
 227         {0x20cc, 0x0618},
 228         {0x20ce, 0x0258},
 229         {0x20d0, 0x2266},
 230         {0x20d2, 0x20c8},
 231         {0x20d4, 0x2060},
 232         {0x20d6, 0x707b},
 233         {0x20d8, 0x0fdd},
 234         {0x20da, 0x86b8},
 235         {0x20dc, 0x50e0},
 236         {0x20de, 0x0020},
 237         {0x20e0, 0x5100},
 238         {0x20e2, 0x3143},
 239         {0x20e4, 0x5121},
 240         {0x20e6, 0x7800},
 241         {0x20e8, 0x3140},
 242         {0x20ea, 0x01c4},
 243         {0x20ec, 0x01c1},
 244         {0x20ee, 0x01c0},
 245         {0x20f0, 0x01c4},
 246         {0x20f2, 0x2700},
 247         {0x20f4, 0x3d40},
 248         {0x20f6, 0x7800},
 249         {0x20f8, 0xffff},
 250         {0x27fe, 0xe000},
 251         {0x3000, 0x60f8},
 252         {0x3002, 0x187f},
 253         {0x3004, 0x7060},
 254         {0x3006, 0x0114},
 255         {0x3008, 0x60b0},
 256         {0x300a, 0x1473},
 257         {0x300c, 0x0013},
 258         {0x300e, 0x140f},
 259         {0x3010, 0x0040},
 260         {0x3012, 0x100f},
 261         {0x3014, 0x60f8},
 262         {0x3016, 0x187f},
 263         {0x3018, 0x7060},
 264         {0x301a, 0x0114},
 265         {0x301c, 0x60b0},
 266         {0x301e, 0x1473},
 267         {0x3020, 0x0013},
 268         {0x3022, 0x140f},
 269         {0x3024, 0x0040},
 270         {0x3026, 0x000f},
 271
 272         {0x0b00, 0x0000},
 273         {0x0b02, 0x0045},
 274         {0x0b04, 0xb405},
 275         {0x0b06, 0xc403},
 276         {0x0b08, 0x0081},
 277         {0x0b0a, 0x8252},
 278         {0x0b0c, 0xf814},
 279         {0x0b0e, 0xc618},
 280         {0x0b10, 0xa828},
 281         {0x0b12, 0x004c},
 282         {0x0b14, 0x4068},
 283         {0x0b16, 0x0000},
 284         {0x0f30, 0x5b15},
 285         {0x0f32, 0x7067},
 286         {0x0954, 0x0009},
 287         {0x0956, 0x0000},
 288         {0x0958, 0xbb80},
 289         {0x095a, 0x5140},
 290         {0x0c00, 0x1110},
 291         {0x0c02, 0x0011},
 292         {0x0c04, 0x0000},
 293         {0x0c06, 0x0200},
 294         {0x0c10, 0x0040},
 295         {0x0c12, 0x0040},
 296         {0x0c14, 0x0040},
 297         {0x0c16, 0x0040},
 298         {0x0a10, 0x4000},
 299         {0x3068, 0xf800},
 300         {0x306a, 0xf876},
 301         {0x006c, 0x0000},
 302         {0x005e, 0x0200},
 303         {0x000e, 0x0100},
 304         {0x0e0a, 0x0001},
 305         {0x004a, 0x0100},
 306         {0x004c, 0x0000},
 307         {0x004e, 0x0100},
 308         {0x000c, 0x0022},
 309         {0x0008, 0x0b00},
 310         {0x005a, 0x0202},
 311         {0x0012, 0x000e},
 312         {0x0018, 0x0a33},
 313         {0x0022, 0x0008},
 314         {0x0028, 0x0017},
 315         {0x0024, 0x0028},
 316         {0x002a, 0x002d},
 317         {0x0026, 0x0030},
 318         {0x002c, 0x07c9},
 319         {0x002e, 0x1111},
 320         {0x0030, 0x1111},
 321         {0x0032, 0x1111},
 322         {0x0006, 0x07bc},
 323         {0x0a22, 0x0000},
 324         {0x0a12, 0x0a20},
 325         {0x0a14, 0x0798},
 326         {0x003e, 0x0000},
 327         {0x0074, 0x080e},
 328         {0x0070, 0x0407},
 329         {0x0002, 0x0000},
 330         {0x0a02, 0x0100},
 331         {0x0a24, 0x0100},
 332         {0x0046, 0x0000},
 333         {0x0076, 0x0000},
 334         {0x0060, 0x0000},
 335         {0x0062, 0x0530},
 336         {0x0064, 0x0500},
 337         {0x0066, 0x0530},
 338         {0x0068, 0x0500},
 339         {0x0122, 0x0300},
 340         {0x015a, 0xff08},
 341         {0x0804, 0x0300},
 342         {0x0806, 0x0100},
 343         {0x005c, 0x0102},
 344         {0x0a1a, 0x0800},
 345 };
 346
 347 static const struct hi556_reg mode_2592x1944_regs[] = {
 348         {0x0a00, 0x0000},
 349         {0x0b0a, 0x8252},
 350         {0x0f30, 0x5b15},
 351         {0x0f32, 0x7067},
 352         {0x004a, 0x0100},
 353         {0x004c, 0x0000},
 354         {0x004e, 0x0100},
 355         {0x000c, 0x0022},
 356         {0x0008, 0x0b00},
 357         {0x005a, 0x0202},
 358         {0x0012, 0x000e},
 359         {0x0018, 0x0a33},
 360         {0x0022, 0x0008},
 361         {0x0028, 0x0017},
 362         {0x0024, 0x0028},
 363         {0x002a, 0x002d},
 364         {0x0026, 0x0030},
 365         {0x002c, 0x07c9},
 366         {0x002e, 0x1111},
 367         {0x0030, 0x1111},
 368         {0x0032, 0x1111},
 369         {0x0006, 0x0814},
 370         {0x0a22, 0x0000},
 371         {0x0a12, 0x0a20},
 372         {0x0a14, 0x0798},
 373         {0x003e, 0x0000},
 374         {0x0074, 0x0812},
 375         {0x0070, 0x0409},
 376         {0x0804, 0x0300},
 377         {0x0806, 0x0100},
 378         {0x0a04, 0x014a},
 379         {0x090c, 0x0fdc},
 380         {0x090e, 0x002d},
 381
 382         {0x0902, 0x4319},
 383         {0x0914, 0xc10a},
 384         {0x0916, 0x071f},
 385         {0x0918, 0x0408},
 386         {0x091a, 0x0c0d},
 387         {0x091c, 0x0f09},
 388         {0x091e, 0x0a00},
 389         {0x0958, 0xbb80},
 390 };
 391
 392 static const struct hi556_reg mode_2592x1444_regs[] = {
 393         {0x0a00, 0x0000},
 394         {0x0b0a, 0x8252},
 395         {0x0f30, 0xe545},
 396         {0x0f32, 0x7067},
 397         {0x004a, 0x0100},
 398         {0x004c, 0x0000},
 399         {0x000c, 0x0022},
 400         {0x0008, 0x0b00},
 401         {0x005a, 0x0202},
 402         {0x0012, 0x000e},
 403         {0x0018, 0x0a33},
 404         {0x0022, 0x0008},
 405         {0x0028, 0x0017},
 406         {0x0024, 0x0122},
 407         {0x002a, 0x0127},
 408         {0x0026, 0x012a},
 409         {0x002c, 0x06cf},
 410         {0x002e, 0x1111},
 411         {0x0030, 0x1111},
 412         {0x0032, 0x1111},
 413         {0x0006, 0x0821},
 414         {0x0a22, 0x0000},
 415         {0x0a12, 0x0a20},
 416         {0x0a14, 0x05a4},
 417         {0x003e, 0x0000},
 418         {0x0074, 0x081f},
 419         {0x0070, 0x040f},
 420         {0x0804, 0x0300},
 421         {0x0806, 0x0100},
 422         {0x0a04, 0x014a},
 423         {0x090c, 0x0fdc},
 424         {0x090e, 0x002d},
 425         {0x0902, 0x4319},
 426         {0x0914, 0xc10a},
 427         {0x0916, 0x071f},
 428         {0x0918, 0x0408},
 429         {0x091a, 0x0c0d},
 430         {0x091c, 0x0f09},
 431         {0x091e, 0x0a00},
 432         {0x0958, 0xbb80},
 433 };
 434
 435 static const struct hi556_reg mode_1296x972_regs[] = {
 436         {0x0a00, 0x0000},
 437         {0x0b0a, 0x8259},
 438         {0x0f30, 0x5b15},
 439         {0x0f32, 0x7167},
 440         {0x004a, 0x0100},
 441         {0x004c, 0x0000},
 442         {0x004e, 0x0100},
 443         {0x000c, 0x0122},
 444         {0x0008, 0x0b00},
 445         {0x005a, 0x0404},
 446         {0x0012, 0x000c},
 447         {0x0018, 0x0a33},
 448         {0x0022, 0x0008},
 449         {0x0028, 0x0017},
 450         {0x0024, 0x0022},
 451         {0x002a, 0x002b},
 452         {0x0026, 0x0030},
 453         {0x002c, 0x07c9},
 454         {0x002e, 0x3311},
 455         {0x0030, 0x3311},
 456         {0x0032, 0x3311},
 457         {0x0006, 0x0814},
 458         {0x0a22, 0x0000},
 459         {0x0a12, 0x0510},
 460         {0x0a14, 0x03cc},
 461         {0x003e, 0x0000},
 462         {0x0074, 0x0812},
 463         {0x0070, 0x0409},
 464         {0x0804, 0x0308},
 465         {0x0806, 0x0100},
 466         {0x0a04, 0x016a},
 467         {0x090e, 0x0010},
 468         {0x090c, 0x09c0},
 469
 470         {0x0902, 0x4319},
 471         {0x0914, 0xc106},
 472         {0x0916, 0x040e},
 473         {0x0918, 0x0304},
 474         {0x091a, 0x0708},
 475         {0x091c, 0x0e06},
 476         {0x091e, 0x0300},
 477         {0x0958, 0xbb80},
 478 };
 479
 480 static const char * const hi556_test_pattern_menu[] = {
 481         "Disabled",
 482         "Solid Colour",
 483         "100% Colour Bars",
 484         "Fade To Grey Colour Bars",
 485         "PN9",
 486         "Gradient Horizontal",
 487         "Gradient Vertical",
 488         "Check Board",
 489         "Slant Pattern",
 490 };
 491
 492 static const s64 link_freq_menu_items[] = {
 493         HI556_LINK_FREQ_437MHZ,
 494 };
 495
 496 static const struct hi556_link_freq_config link_freq_configs[] = {
 497         [HI556_LINK_FREQ_437MHZ_INDEX] = {
 498                 .reg_list = {
 499                         .num_of_regs = ARRAY_SIZE(mipi_data_rate_874mbps),
 500                         .regs = mipi_data_rate_874mbps,
 501                 }
 502         }
 503 };
 504
 505 static const struct hi556_mode supported_modes[] = {
 506         {
 507                 .width = HI556_PIXEL_ARRAY_WIDTH,
 508                 .height = HI556_PIXEL_ARRAY_HEIGHT,
 509                 .crop = {
 510                         .left = HI556_PIXEL_ARRAY_LEFT,
 511                         .top = HI556_PIXEL_ARRAY_TOP,
 512                         .width = HI556_PIXEL_ARRAY_WIDTH,
 513                         .height = HI556_PIXEL_ARRAY_HEIGHT
 514                 },
 515                 .fll_def = HI556_FLL_30FPS,
 516                 .fll_min = HI556_FLL_30FPS_MIN,
 517                 .llp = 0x0b00,
 518                 .reg_list = {
 519                         .num_of_regs = ARRAY_SIZE(mode_2592x1944_regs),
 520                         .regs = mode_2592x1944_regs,
 521                 },
 522                 .link_freq_index = HI556_LINK_FREQ_437MHZ_INDEX,
 523         },
 524         {
 525                 .width = HI556_PIXEL_ARRAY_WIDTH,
 526                 .height = 1444,
 527                 .crop = {
 528                         .left = HI556_PIXEL_ARRAY_LEFT,
 529                         .top = 250,
 530                         .width = HI556_PIXEL_ARRAY_WIDTH,
 531                         .height = 1444
 532                 },
 533                 .fll_def = 0x821,
 534                 .fll_min = 0x821,
 535                 .llp = 0x0b00,
 536                 .reg_list = {
 537                         .num_of_regs = ARRAY_SIZE(mode_2592x1444_regs),
 538                         .regs = mode_2592x1444_regs,
 539                 },
 540                 .link_freq_index = HI556_LINK_FREQ_437MHZ_INDEX,
 541         },
 542         {
 543                 .width = 1296,
 544                 .height = 972,
 545                 .crop = {
 546                         .left = HI556_PIXEL_ARRAY_LEFT,
 547                         .top = HI556_PIXEL_ARRAY_TOP,
 548                         .width = HI556_PIXEL_ARRAY_WIDTH,
 549                         .height = HI556_PIXEL_ARRAY_HEIGHT
 550                 },
 551                 .fll_def = HI556_FLL_30FPS,
 552                 .fll_min = HI556_FLL_30FPS_MIN,
 553                 .llp = 0x0b00,
 554                 .reg_list = {
 555                         .num_of_regs = ARRAY_SIZE(mode_1296x972_regs),
 556                         .regs = mode_1296x972_regs,
 557                 },
 558                 .link_freq_index = HI556_LINK_FREQ_437MHZ_INDEX,
 559         }
 560 };
 561
 562 struct hi556 {
 563         struct v4l2_subdev sd;
 564         struct media_pad pad;
 565         struct v4l2_ctrl_handler ctrl_handler;
 566
 567         /* V4L2 Controls */
 568         struct v4l2_ctrl *link_freq;
 569         struct v4l2_ctrl *pixel_rate;
 570         struct v4l2_ctrl *vblank;
 571         struct v4l2_ctrl *hblank;
 572         struct v4l2_ctrl *exposure;
 573
 574         /* Current mode */
 575         const struct hi556_mode *cur_mode;
 576
 577         /* To serialize asynchronus callbacks */
 578         struct mutex mutex;
 579
 580         /* Streaming on/off */
 581         bool streaming;
 582
 583         /* True if the device has been identified */
 584         bool identified;
 585 };
 586
 587 static u64 to_pixel_rate(u32 f_index)
 588 {
 589         u64 pixel_rate = link_freq_menu_items[f_index] * 2 * HI556_DATA_LANES;
 590
 591         do_div(pixel_rate, HI556_RGB_DEPTH);
 592
 593         return pixel_rate;
 594 }
 595
 596 static int hi556_read_reg(struct hi556 *hi556, u16 reg, u16 len, u32 *val)
 597 {
 598         struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
 599         struct i2c_msg msgs[2];
 600         u8 addr_buf[2];
 601         u8 data_buf[4] = {0};
 602         int ret;
 603
 604         if (len > 4)
 605                 return -EINVAL;
 606
 607         put_unaligned_be16(reg, addr_buf);
 608         msgs[0].addr = client->addr;
 609         msgs[0].flags = 0;
 610         msgs[0].len = sizeof(addr_buf);
 611         msgs[0].buf = addr_buf;
 612         msgs[1].addr = client->addr;
 613         msgs[1].flags = I2C_M_RD;
 614         msgs[1].len = len;
 615         msgs[1].buf = &data_buf[4 - len];
 616
 617         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 618         if (ret != ARRAY_SIZE(msgs))
 619                 return -EIO;
 620
 621         *val = get_unaligned_be32(data_buf);
 622
 623         return 0;
 624 }
 625
 626 static int hi556_write_reg(struct hi556 *hi556, u16 reg, u16 len, u32 val)
 627 {
 628         struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
 629         u8 buf[6];
 630
 631         if (len > 4)
 632                 return -EINVAL;
 633
 634         put_unaligned_be16(reg, buf);
 635         put_unaligned_be32(val << 8 * (4 - len), buf + 2);
 636         if (i2c_master_send(client, buf, len + 2) != len + 2)
 637                 return -EIO;
 638
 639         return 0;
 640 }
 641
 642 static int hi556_write_reg_list(struct hi556 *hi556,
 643                                 const struct hi556_reg_list *r_list)
 644 {
 645         struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
 646         unsigned int i;
 647         int ret;
 648
 649         for (i = 0; i < r_list->num_of_regs; i++) {
 650                 ret = hi556_write_reg(hi556, r_list->regs[i].address,
 651                                       HI556_REG_VALUE_16BIT,
 652                                       r_list->regs[i].val);
 653                 if (ret) {
 654                         dev_err_ratelimited(&client->dev,
 655                                             "failed to write reg 0x%4.4x. error = %d",
 656                                             r_list->regs[i].address, ret);
 657                         return ret;
 658                 }
 659         }
 660
 661         return 0;
 662 }
 663
 664 static int hi556_update_digital_gain(struct hi556 *hi556, u32 d_gain)
 665 {
 666         int ret;
 667
 668         ret = hi556_write_reg(hi556, HI556_REG_MWB_GR_GAIN,
 669                               HI556_REG_VALUE_16BIT, d_gain);
 670         if (ret)
 671                 return ret;
 672
 673         ret = hi556_write_reg(hi556, HI556_REG_MWB_GB_GAIN,
 674                               HI556_REG_VALUE_16BIT, d_gain);
 675         if (ret)
 676                 return ret;
 677
 678         ret = hi556_write_reg(hi556, HI556_REG_MWB_R_GAIN,
 679                               HI556_REG_VALUE_16BIT, d_gain);
 680         if (ret)
 681                 return ret;
 682
 683         return hi556_write_reg(hi556, HI556_REG_MWB_B_GAIN,
 684                                HI556_REG_VALUE_16BIT, d_gain);
 685 }
 686
 687 static int hi556_test_pattern(struct hi556 *hi556, u32 pattern)
 688 {
 689         int ret;
 690         u32 val;
 691
 692         if (pattern) {
 693                 ret = hi556_read_reg(hi556, HI556_REG_ISP,
 694                                      HI556_REG_VALUE_08BIT, &val);
 695                 if (ret)
 696                         return ret;
 697
 698                 ret = hi556_write_reg(hi556, HI556_REG_ISP,
 699                                       HI556_REG_VALUE_08BIT,
 700                                       val | HI556_REG_ISP_TPG_EN);
 701                 if (ret)
 702                         return ret;
 703         }
 704
 705         return hi556_write_reg(hi556, HI556_REG_TEST_PATTERN,
 706                                HI556_REG_VALUE_08BIT, pattern);
 707 }
 708
 709 static int hi556_set_ctrl(struct v4l2_ctrl *ctrl)
 710 {
 711         struct hi556 *hi556 = container_of(ctrl->handler,
 712                                              struct hi556, ctrl_handler);
 713         struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
 714         s64 exposure_max;
 715         int ret = 0;
 716
 717         /* Propagate change of current control to all related controls */
 718         if (ctrl->id == V4L2_CID_VBLANK) {
 719                 /* Update max exposure while meeting expected vblanking */
 720                 exposure_max = hi556->cur_mode->height + ctrl->val -
 721                                HI556_EXPOSURE_MAX_MARGIN;
 722                 __v4l2_ctrl_modify_range(hi556->exposure,
 723                                          hi556->exposure->minimum,
 724                                          exposure_max, hi556->exposure->step,
 725                                          exposure_max);
 726         }
 727
 728         /* V4L2 controls values will be applied only when power is already up */
 729         if (!pm_runtime_get_if_in_use(&client->dev))
 730                 return 0;
 731
 732         switch (ctrl->id) {
 733         case V4L2_CID_ANALOGUE_GAIN:
 734                 ret = hi556_write_reg(hi556, HI556_REG_ANALOG_GAIN,
 735                                       HI556_REG_VALUE_16BIT, ctrl->val);
 736                 break;
 737
 738         case V4L2_CID_DIGITAL_GAIN:
 739                 ret = hi556_update_digital_gain(hi556, ctrl->val);
 740                 break;
 741
 742         case V4L2_CID_EXPOSURE:
 743                 ret = hi556_write_reg(hi556, HI556_REG_EXPOSURE,
 744                                       HI556_REG_VALUE_16BIT, ctrl->val);
 745                 break;
 746
 747         case V4L2_CID_VBLANK:
 748                 /* Update FLL that meets expected vertical blanking */
 749                 ret = hi556_write_reg(hi556, HI556_REG_FLL,
 750                                       HI556_REG_VALUE_16BIT,
 751                                       hi556->cur_mode->height + ctrl->val);
 752                 break;
 753
 754         case V4L2_CID_TEST_PATTERN:
 755                 ret = hi556_test_pattern(hi556, ctrl->val);
 756                 break;
 757
 758         default:
 759                 ret = -EINVAL;
 760                 break;
 761         }
 762
 763         pm_runtime_put(&client->dev);
 764
 765         return ret;
 766 }
 767
 768 static const struct v4l2_ctrl_ops hi556_ctrl_ops = {
 769         .s_ctrl = hi556_set_ctrl,
 770 };
 771
 772 static int hi556_init_controls(struct hi556 *hi556)
 773 {
 774         struct v4l2_ctrl_handler *ctrl_hdlr;
 775         s64 exposure_max, h_blank;
 776         int ret;
 777
 778         ctrl_hdlr = &hi556->ctrl_handler;
 779         ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
 780         if (ret)
 781                 return ret;
 782
 783         ctrl_hdlr->lock = &hi556->mutex;
 784         hi556->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &hi556_ctrl_ops,
 785                                                   V4L2_CID_LINK_FREQ,
 786                                         ARRAY_SIZE(link_freq_menu_items) - 1,
 787                                         0, link_freq_menu_items);
 788         if (hi556->link_freq)
 789                 hi556->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
 790
 791         hi556->pixel_rate = v4l2_ctrl_new_std
 792                             (ctrl_hdlr, &hi556_ctrl_ops,
 793                              V4L2_CID_PIXEL_RATE, 0,
 794                              to_pixel_rate(HI556_LINK_FREQ_437MHZ_INDEX),
 795                              1,
 796                              to_pixel_rate(HI556_LINK_FREQ_437MHZ_INDEX));
 797         hi556->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops,
 798                                           V4L2_CID_VBLANK,
 799                                           hi556->cur_mode->fll_min -
 800                                           hi556->cur_mode->height,
 801                                           HI556_FLL_MAX -
 802                                           hi556->cur_mode->height, 1,
 803                                           hi556->cur_mode->fll_def -
 804                                           hi556->cur_mode->height);
 805
 806         h_blank = hi556->cur_mode->llp - hi556->cur_mode->width;
 807
 808         hi556->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops,
 809                                           V4L2_CID_HBLANK, h_blank, h_blank, 1,
 810                                           h_blank);
 811         if (hi556->hblank)
 812                 hi556->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
 813
 814         v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
 815                           HI556_ANAL_GAIN_MIN, HI556_ANAL_GAIN_MAX,
 816                           HI556_ANAL_GAIN_STEP, HI556_ANAL_GAIN_MIN);
 817         v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
 818                           HI556_DGTL_GAIN_MIN, HI556_DGTL_GAIN_MAX,
 819                           HI556_DGTL_GAIN_STEP, HI556_DGTL_GAIN_DEFAULT);
 820         exposure_max = hi556->cur_mode->fll_def - HI556_EXPOSURE_MAX_MARGIN;
 821         hi556->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops,
 822                                             V4L2_CID_EXPOSURE,
 823                                             HI556_EXPOSURE_MIN, exposure_max,
 824                                             HI556_EXPOSURE_STEP,
 825                                             exposure_max);
 826         v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &hi556_ctrl_ops,
 827                                      V4L2_CID_TEST_PATTERN,
 828                                      ARRAY_SIZE(hi556_test_pattern_menu) - 1,
 829                                      0, 0, hi556_test_pattern_menu);
 830         if (ctrl_hdlr->error)
 831                 return ctrl_hdlr->error;
 832
 833         hi556->sd.ctrl_handler = ctrl_hdlr;
 834
 835         return 0;
 836 }
 837
 838 static void hi556_assign_pad_format(const struct hi556_mode *mode,
 839                                     struct v4l2_mbus_framefmt *fmt)
 840 {
 841         fmt->width = mode->width;
 842         fmt->height = mode->height;
 843         fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
 844         fmt->field = V4L2_FIELD_NONE;
 845 }
 846
 847 static int hi556_identify_module(struct hi556 *hi556)
 848 {
 849         struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
 850         int ret;
 851         u32 val;
 852
 853         if (hi556->identified)
 854                 return 0;
 855
 856         ret = hi556_read_reg(hi556, HI556_REG_CHIP_ID,
 857                              HI556_REG_VALUE_16BIT, &val);
 858         if (ret)
 859                 return ret;
 860
 861         if (val != HI556_CHIP_ID) {
 862                 dev_err(&client->dev, "chip id mismatch: %x!=%x",
 863                         HI556_CHIP_ID, val);
 864                 return -ENXIO;
 865         }
 866
 867         hi556->identified = true;
 868
 869         return 0;
 870 }
 871
 872 static const struct v4l2_rect *
 873 __hi556_get_pad_crop(struct hi556 *hi556,
 874                      struct v4l2_subdev_state *sd_state,
 875                      unsigned int pad, enum v4l2_subdev_format_whence which)
 876 {
 877         switch (which) {
 878         case V4L2_SUBDEV_FORMAT_TRY:
 879                 return v4l2_subdev_get_try_crop(&hi556->sd, sd_state, pad);
 880         case V4L2_SUBDEV_FORMAT_ACTIVE:
 881                 return &hi556->cur_mode->crop;
 882         }
 883
 884         return NULL;
 885 }
 886
 887 static int hi556_get_selection(struct v4l2_subdev *sd,
 888                                struct v4l2_subdev_state *sd_state,
 889                                struct v4l2_subdev_selection *sel)
 890 {
 891         switch (sel->target) {
 892         case V4L2_SEL_TGT_CROP: {
 893                 struct hi556 *hi556 = to_hi556(sd);
 894
 895                 mutex_lock(&hi556->mutex);
 896                 sel->r = *__hi556_get_pad_crop(hi556, sd_state, sel->pad,
 897                                                 sel->which);
 898                 mutex_unlock(&hi556->mutex);
 899
 900                 return 0;
 901         }
 902
 903         case V4L2_SEL_TGT_NATIVE_SIZE:
 904                 sel->r.top = 0;
 905                 sel->r.left = 0;
 906                 sel->r.width = HI556_NATIVE_WIDTH;
 907                 sel->r.height = HI556_NATIVE_HEIGHT;
 908
 909                 return 0;
 910
 911         case V4L2_SEL_TGT_CROP_DEFAULT:
 912         case V4L2_SEL_TGT_CROP_BOUNDS:
 913                 sel->r.top = HI556_PIXEL_ARRAY_TOP;
 914                 sel->r.left = HI556_PIXEL_ARRAY_LEFT;
 915                 sel->r.width = HI556_PIXEL_ARRAY_WIDTH;
 916                 sel->r.height = HI556_PIXEL_ARRAY_HEIGHT;
 917
 918                 return 0;
 919         }
 920
 921         return -EINVAL;
 922 }
 923
 924 static int hi556_start_streaming(struct hi556 *hi556)
 925 {
 926         struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
 927         const struct hi556_reg_list *reg_list;
 928         int link_freq_index, ret;
 929
 930         ret = hi556_identify_module(hi556);
 931         if (ret)
 932                 return ret;
 933
 934         link_freq_index = hi556->cur_mode->link_freq_index;
 935         reg_list = &link_freq_configs[link_freq_index].reg_list;
 936         ret = hi556_write_reg_list(hi556, reg_list);
 937         if (ret) {
 938                 dev_err(&client->dev, "failed to set plls");
 939                 return ret;
 940         }
 941
 942         reg_list = &hi556->cur_mode->reg_list;
 943         ret = hi556_write_reg_list(hi556, reg_list);
 944         if (ret) {
 945                 dev_err(&client->dev, "failed to set mode");
 946                 return ret;
 947         }
 948
 949         ret = __v4l2_ctrl_handler_setup(hi556->sd.ctrl_handler);
 950         if (ret)
 951                 return ret;
 952
 953         ret = hi556_write_reg(hi556, HI556_REG_MODE_SELECT,
 954                               HI556_REG_VALUE_16BIT, HI556_MODE_STREAMING);
 955
 956         if (ret) {
 957                 dev_err(&client->dev, "failed to set stream");
 958                 return ret;
 959         }
 960
 961         return 0;
 962 }
 963
 964 static void hi556_stop_streaming(struct hi556 *hi556)
 965 {
 966         struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
 967
 968         if (hi556_write_reg(hi556, HI556_REG_MODE_SELECT,
 969                             HI556_REG_VALUE_16BIT, HI556_MODE_STANDBY))
 970                 dev_err(&client->dev, "failed to set stream");
 971 }
 972
 973 static int hi556_set_stream(struct v4l2_subdev *sd, int enable)
 974 {
 975         struct hi556 *hi556 = to_hi556(sd);
 976         struct i2c_client *client = v4l2_get_subdevdata(sd);
 977         int ret = 0;
 978
 979         if (hi556->streaming == enable)
 980                 return 0;
 981
 982         mutex_lock(&hi556->mutex);
 983         if (enable) {
 984                 ret = pm_runtime_resume_and_get(&client->dev);
 985                 if (ret < 0) {
 986                         mutex_unlock(&hi556->mutex);
 987                         return ret;
 988                 }
 989
 990                 ret = hi556_start_streaming(hi556);
 991                 if (ret) {
 992                         enable = 0;
 993                         hi556_stop_streaming(hi556);
 994                         pm_runtime_put(&client->dev);
 995                 }
 996         } else {
 997                 hi556_stop_streaming(hi556);
 998                 pm_runtime_put(&client->dev);
 999         }
1000
1001         hi556->streaming = enable;
1002         mutex_unlock(&hi556->mutex);
1003
1004         return ret;
1005 }
1006
1007 static int __maybe_unused hi556_suspend(struct device *dev)
1008 {
1009         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1010         struct hi556 *hi556 = to_hi556(sd);
1011
1012         mutex_lock(&hi556->mutex);
1013         if (hi556->streaming)
1014                 hi556_stop_streaming(hi556);
1015
1016         mutex_unlock(&hi556->mutex);
1017
1018         return 0;
1019 }
1020
1021 static int __maybe_unused hi556_resume(struct device *dev)
1022 {
1023         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1024         struct hi556 *hi556 = to_hi556(sd);
1025         int ret;
1026
1027         mutex_lock(&hi556->mutex);
1028         if (hi556->streaming) {
1029                 ret = hi556_start_streaming(hi556);
1030                 if (ret)
1031                         goto error;
1032         }
1033
1034         mutex_unlock(&hi556->mutex);
1035
1036         return 0;
1037
1038 error:
1039         hi556_stop_streaming(hi556);
1040         hi556->streaming = 0;
1041         mutex_unlock(&hi556->mutex);
1042         return ret;
1043 }
1044
1045 static int hi556_set_format(struct v4l2_subdev *sd,
1046                             struct v4l2_subdev_state *sd_state,
1047                             struct v4l2_subdev_format *fmt)
1048 {
1049         struct hi556 *hi556 = to_hi556(sd);
1050         const struct hi556_mode *mode;
1051         s32 vblank_def, h_blank;
1052
1053         mode = v4l2_find_nearest_size(supported_modes,
1054                                       ARRAY_SIZE(supported_modes), width,
1055                                       height, fmt->format.width,
1056                                       fmt->format.height);
1057
1058         mutex_lock(&hi556->mutex);
1059         hi556_assign_pad_format(mode, &fmt->format);
1060         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1061                 *v4l2_subdev_get_try_format(sd, sd_state, fmt->pad) = fmt->format;
1062         } else {
1063                 hi556->cur_mode = mode;
1064                 __v4l2_ctrl_s_ctrl(hi556->link_freq, mode->link_freq_index);
1065                 __v4l2_ctrl_s_ctrl_int64(hi556->pixel_rate,
1066                                          to_pixel_rate(mode->link_freq_index));
1067
1068                 /* Update limits and set FPS to default */
1069                 vblank_def = mode->fll_def - mode->height;
1070                 __v4l2_ctrl_modify_range(hi556->vblank,
1071                                          mode->fll_min - mode->height,
1072                                          HI556_FLL_MAX - mode->height, 1,
1073                                          vblank_def);
1074                 __v4l2_ctrl_s_ctrl(hi556->vblank, vblank_def);
1075
1076                 h_blank = hi556->cur_mode->llp - hi556->cur_mode->width;
1077
1078                 __v4l2_ctrl_modify_range(hi556->hblank, h_blank, h_blank, 1,
1079                                          h_blank);
1080         }
1081
1082         mutex_unlock(&hi556->mutex);
1083
1084         return 0;
1085 }
1086
1087 static int hi556_get_format(struct v4l2_subdev *sd,
1088                             struct v4l2_subdev_state *sd_state,
1089                             struct v4l2_subdev_format *fmt)
1090 {
1091         struct hi556 *hi556 = to_hi556(sd);
1092
1093         mutex_lock(&hi556->mutex);
1094         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
1095                 fmt->format = *v4l2_subdev_get_try_format(&hi556->sd,
1096                                                           sd_state,
1097                                                           fmt->pad);
1098         else
1099                 hi556_assign_pad_format(hi556->cur_mode, &fmt->format);
1100
1101         mutex_unlock(&hi556->mutex);
1102
1103         return 0;
1104 }
1105
1106 static int hi556_enum_mbus_code(struct v4l2_subdev *sd,
1107                                 struct v4l2_subdev_state *sd_state,
1108                                 struct v4l2_subdev_mbus_code_enum *code)
1109 {
1110         if (code->index > 0)
1111                 return -EINVAL;
1112
1113         code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
1114
1115         return 0;
1116 }
1117
1118 static int hi556_enum_frame_size(struct v4l2_subdev *sd,
1119                                  struct v4l2_subdev_state *sd_state,
1120                                  struct v4l2_subdev_frame_size_enum *fse)
1121 {
1122         if (fse->index >= ARRAY_SIZE(supported_modes))
1123                 return -EINVAL;
1124
1125         if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10)
1126                 return -EINVAL;
1127
1128         fse->min_width = supported_modes[fse->index].width;
1129         fse->max_width = fse->min_width;
1130         fse->min_height = supported_modes[fse->index].height;
1131         fse->max_height = fse->min_height;
1132
1133         return 0;
1134 }
1135
1136 static int hi556_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1137 {
1138         struct hi556 *hi556 = to_hi556(sd);
1139         struct v4l2_rect *try_crop;
1140
1141         mutex_lock(&hi556->mutex);
1142         hi556_assign_pad_format(&supported_modes[0],
1143                                 v4l2_subdev_get_try_format(sd, fh->state, 0));
1144
1145         /* Initialize try_crop rectangle. */
1146         try_crop = v4l2_subdev_get_try_crop(sd, fh->state, 0);
1147         try_crop->top = HI556_PIXEL_ARRAY_TOP;
1148         try_crop->left = HI556_PIXEL_ARRAY_LEFT;
1149         try_crop->width = HI556_PIXEL_ARRAY_WIDTH;
1150         try_crop->height = HI556_PIXEL_ARRAY_HEIGHT;
1151
1152         mutex_unlock(&hi556->mutex);
1153
1154         return 0;
1155 }
1156
1157 static const struct v4l2_subdev_video_ops hi556_video_ops = {
1158         .s_stream = hi556_set_stream,
1159 };
1160
1161 static const struct v4l2_subdev_pad_ops hi556_pad_ops = {
1162         .set_fmt = hi556_set_format,
1163         .get_fmt = hi556_get_format,
1164         .get_selection = hi556_get_selection,
1165         .enum_mbus_code = hi556_enum_mbus_code,
1166         .enum_frame_size = hi556_enum_frame_size,
1167 };
1168
1169 static const struct v4l2_subdev_ops hi556_subdev_ops = {
1170         .video = &hi556_video_ops,
1171         .pad = &hi556_pad_ops,
1172 };
1173
1174 static const struct media_entity_operations hi556_subdev_entity_ops = {
1175         .link_validate = v4l2_subdev_link_validate,
1176 };
1177
1178 static const struct v4l2_subdev_internal_ops hi556_internal_ops = {
1179         .open = hi556_open,
1180 };
1181
1182 static int hi556_check_hwcfg(struct device *dev)
1183 {
1184         struct fwnode_handle *ep;
1185         struct fwnode_handle *fwnode = dev_fwnode(dev);
1186         struct v4l2_fwnode_endpoint bus_cfg = {
1187                 .bus_type = V4L2_MBUS_CSI2_DPHY
1188         };
1189         u32 mclk;
1190         int ret = 0;
1191         unsigned int i, j;
1192
1193         if (!fwnode)
1194                 return -ENXIO;
1195
1196         ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk);
1197         if (ret) {
1198                 dev_err(dev, "can't get clock frequency");
1199                 return ret;
1200         }
1201
1202         if (mclk != HI556_MCLK) {
1203                 dev_err(dev, "external clock %d is not supported", mclk);
1204                 return -EINVAL;
1205         }
1206
1207         ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
1208         if (!ep)
1209                 return -ENXIO;
1210
1211         ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
1212         fwnode_handle_put(ep);
1213         if (ret)
1214                 return ret;
1215
1216         if (bus_cfg.bus.mipi_csi2.num_data_lanes != 2) {
1217                 dev_err(dev, "number of CSI2 data lanes %d is not supported",
1218                         bus_cfg.bus.mipi_csi2.num_data_lanes);
1219                 ret = -EINVAL;
1220                 goto check_hwcfg_error;
1221         }
1222
1223         if (!bus_cfg.nr_of_link_frequencies) {
1224                 dev_err(dev, "no link frequencies defined");
1225                 ret = -EINVAL;
1226                 goto check_hwcfg_error;
1227         }
1228
1229         for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
1230                 for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
1231                         if (link_freq_menu_items[i] ==
1232                                 bus_cfg.link_frequencies[j])
1233                                 break;
1234                 }
1235
1236                 if (j == bus_cfg.nr_of_link_frequencies) {
1237                         dev_err(dev, "no link frequency %lld supported",
1238                                 link_freq_menu_items[i]);
1239                         ret = -EINVAL;
1240                         goto check_hwcfg_error;
1241                 }
1242         }
1243
1244 check_hwcfg_error:
1245         v4l2_fwnode_endpoint_free(&bus_cfg);
1246
1247         return ret;
1248 }
1249
1250 static void hi556_remove(struct i2c_client *client)
1251 {
1252         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1253         struct hi556 *hi556 = to_hi556(sd);
1254
1255         v4l2_async_unregister_subdev(sd);
1256         media_entity_cleanup(&sd->entity);
1257         v4l2_ctrl_handler_free(sd->ctrl_handler);
1258         pm_runtime_disable(&client->dev);
1259         mutex_destroy(&hi556->mutex);
1260 }
1261
1262 static int hi556_probe(struct i2c_client *client)
1263 {
1264         struct hi556 *hi556;
1265         bool full_power;
1266         int ret;
1267
1268         ret = hi556_check_hwcfg(&client->dev);
1269         if (ret) {
1270                 dev_err(&client->dev, "failed to check HW configuration: %d",
1271                         ret);
1272                 return ret;
1273         }
1274
1275         hi556 = devm_kzalloc(&client->dev, sizeof(*hi556), GFP_KERNEL);
1276         if (!hi556)
1277                 return -ENOMEM;
1278
1279         v4l2_i2c_subdev_init(&hi556->sd, client, &hi556_subdev_ops);
1280
1281         full_power = acpi_dev_state_d0(&client->dev);
1282         if (full_power) {
1283                 ret = hi556_identify_module(hi556);
1284                 if (ret) {
1285                         dev_err(&client->dev, "failed to find sensor: %d", ret);
1286                         return ret;
1287                 }
1288         }
1289
1290         mutex_init(&hi556->mutex);
1291         hi556->cur_mode = &supported_modes[0];
1292         ret = hi556_init_controls(hi556);
1293         if (ret) {
1294                 dev_err(&client->dev, "failed to init controls: %d", ret);
1295                 goto probe_error_v4l2_ctrl_handler_free;
1296         }
1297
1298         hi556->sd.internal_ops = &hi556_internal_ops;
1299         hi556->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1300         hi556->sd.entity.ops = &hi556_subdev_entity_ops;
1301         hi556->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1302         hi556->pad.flags = MEDIA_PAD_FL_SOURCE;
1303         ret = media_entity_pads_init(&hi556->sd.entity, 1, &hi556->pad);
1304         if (ret) {
1305                 dev_err(&client->dev, "failed to init entity pads: %d", ret);
1306                 goto probe_error_v4l2_ctrl_handler_free;
1307         }
1308
1309         ret = v4l2_async_register_subdev_sensor(&hi556->sd);
1310         if (ret < 0) {
1311                 dev_err(&client->dev, "failed to register V4L2 subdev: %d",
1312                         ret);
1313                 goto probe_error_media_entity_cleanup;
1314         }
1315
1316         /* Set the device's state to active if it's in D0 state. */
1317         if (full_power)
1318                 pm_runtime_set_active(&client->dev);
1319         pm_runtime_enable(&client->dev);
1320         pm_runtime_idle(&client->dev);
1321
1322         return 0;
1323
1324 probe_error_media_entity_cleanup:
1325         media_entity_cleanup(&hi556->sd.entity);
1326
1327 probe_error_v4l2_ctrl_handler_free:
1328         v4l2_ctrl_handler_free(hi556->sd.ctrl_handler);
1329         mutex_destroy(&hi556->mutex);
1330
1331         return ret;
1332 }
1333
1334 static const struct dev_pm_ops hi556_pm_ops = {
1335         SET_SYSTEM_SLEEP_PM_OPS(hi556_suspend, hi556_resume)
1336 };
1337
1338 #ifdef CONFIG_ACPI
1339 static const struct acpi_device_id hi556_acpi_ids[] = {
1340         {"INT3537"},
1341         {}
1342 };
1343
1344 MODULE_DEVICE_TABLE(acpi, hi556_acpi_ids);
1345 #endif
1346
1347 static struct i2c_driver hi556_i2c_driver = {
1348         .driver = {
1349                 .name = "hi556",
1350                 .pm = &hi556_pm_ops,
1351                 .acpi_match_table = ACPI_PTR(hi556_acpi_ids),
1352         },
1353         .probe_new = hi556_probe,
1354         .remove = hi556_remove,
1355         .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
1356 };
1357
1358 module_i2c_driver(hi556_i2c_driver);
1359
1360 MODULE_AUTHOR("Shawn Tu <[email protected]>");
1361 MODULE_DESCRIPTION("Hynix HI556 sensor driver");
1362 MODULE_LICENSE("GPL v2");