drivers/media/i2c/ov5675.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 OV5675_REG_VALUE_08BIT          1
  15 #define OV5675_REG_VALUE_16BIT          2
  16 #define OV5675_REG_VALUE_24BIT          3
  17
  18 #define OV5675_LINK_FREQ_450MHZ         450000000ULL
  19 #define OV5675_SCLK                     90000000LL
  20 #define OV5675_MCLK                     19200000
  21 #define OV5675_DATA_LANES               2
  22 #define OV5675_RGB_DEPTH                10
  23
  24 #define OV5675_REG_CHIP_ID              0x300a
  25 #define OV5675_CHIP_ID                  0x5675
  26
  27 #define OV5675_REG_MODE_SELECT          0x0100
  28 #define OV5675_MODE_STANDBY             0x00
  29 #define OV5675_MODE_STREAMING           0x01
  30
  31 /* vertical-timings from sensor */
  32 #define OV5675_REG_VTS                  0x380e
  33 #define OV5675_VTS_30FPS                0x07e4
  34 #define OV5675_VTS_30FPS_MIN            0x07e4
  35 #define OV5675_VTS_MAX                  0x7fff
  36
  37 /* horizontal-timings from sensor */
  38 #define OV5675_REG_HTS                  0x380c
  39
  40 /* Exposure controls from sensor */
  41 #define OV5675_REG_EXPOSURE             0x3500
  42 #define OV5675_EXPOSURE_MIN             4
  43 #define OV5675_EXPOSURE_MAX_MARGIN      4
  44 #define OV5675_EXPOSURE_STEP            1
  45
  46 /* Analog gain controls from sensor */
  47 #define OV5675_REG_ANALOG_GAIN          0x3508
  48 #define OV5675_ANAL_GAIN_MIN            128
  49 #define OV5675_ANAL_GAIN_MAX            2047
  50 #define OV5675_ANAL_GAIN_STEP           1
  51
  52 /* Digital gain controls from sensor */
  53 #define OV5675_REG_MWB_R_GAIN           0x5019
  54 #define OV5675_REG_MWB_G_GAIN           0x501b
  55 #define OV5675_REG_MWB_B_GAIN           0x501d
  56 #define OV5675_DGTL_GAIN_MIN            0
  57 #define OV5675_DGTL_GAIN_MAX            4095
  58 #define OV5675_DGTL_GAIN_STEP           1
  59 #define OV5675_DGTL_GAIN_DEFAULT        1024
  60
  61 /* Test Pattern Control */
  62 #define OV5675_REG_TEST_PATTERN         0x4503
  63 #define OV5675_TEST_PATTERN_ENABLE      BIT(7)
  64 #define OV5675_TEST_PATTERN_BAR_SHIFT   2
  65
  66 #define to_ov5675(_sd)                  container_of(_sd, struct ov5675, sd)
  67
  68 enum {
  69         OV5675_LINK_FREQ_900MBPS,
  70 };
  71
  72 struct ov5675_reg {
  73         u16 address;
  74         u8 val;
  75 };
  76
  77 struct ov5675_reg_list {
  78         u32 num_of_regs;
  79         const struct ov5675_reg *regs;
  80 };
  81
  82 struct ov5675_link_freq_config {
  83         const struct ov5675_reg_list reg_list;
  84 };
  85
  86 struct ov5675_mode {
  87         /* Frame width in pixels */
  88         u32 width;
  89
  90         /* Frame height in pixels */
  91         u32 height;
  92
  93         /* Horizontal timining size */
  94         u32 hts;
  95
  96         /* Default vertical timining size */
  97         u32 vts_def;
  98
  99         /* Min vertical timining size */
 100         u32 vts_min;
 101
 102         /* Link frequency needed for this resolution */
 103         u32 link_freq_index;
 104
 105         /* Sensor register settings for this resolution */
 106         const struct ov5675_reg_list reg_list;
 107 };
 108
 109 static const struct ov5675_reg mipi_data_rate_900mbps[] = {
 110         {0x0103, 0x01},
 111         {0x0100, 0x00},
 112         {0x0300, 0x04},
 113         {0x0302, 0x8d},
 114         {0x0303, 0x00},
 115         {0x030d, 0x26},
 116 };
 117
 118 static const struct ov5675_reg mode_2592x1944_regs[] = {
 119         {0x3002, 0x21},
 120         {0x3107, 0x23},
 121         {0x3501, 0x20},
 122         {0x3503, 0x0c},
 123         {0x3508, 0x03},
 124         {0x3509, 0x00},
 125         {0x3600, 0x66},
 126         {0x3602, 0x30},
 127         {0x3610, 0xa5},
 128         {0x3612, 0x93},
 129         {0x3620, 0x80},
 130         {0x3642, 0x0e},
 131         {0x3661, 0x00},
 132         {0x3662, 0x10},
 133         {0x3664, 0xf3},
 134         {0x3665, 0x9e},
 135         {0x3667, 0xa5},
 136         {0x366e, 0x55},
 137         {0x366f, 0x55},
 138         {0x3670, 0x11},
 139         {0x3671, 0x11},
 140         {0x3672, 0x11},
 141         {0x3673, 0x11},
 142         {0x3714, 0x24},
 143         {0x371a, 0x3e},
 144         {0x3733, 0x10},
 145         {0x3734, 0x00},
 146         {0x373d, 0x24},
 147         {0x3764, 0x20},
 148         {0x3765, 0x20},
 149         {0x3766, 0x12},
 150         {0x37a1, 0x14},
 151         {0x37a8, 0x1c},
 152         {0x37ab, 0x0f},
 153         {0x37c2, 0x04},
 154         {0x37cb, 0x00},
 155         {0x37cc, 0x00},
 156         {0x37cd, 0x00},
 157         {0x37ce, 0x00},
 158         {0x37d8, 0x02},
 159         {0x37d9, 0x08},
 160         {0x37dc, 0x04},
 161         {0x3800, 0x00},
 162         {0x3801, 0x00},
 163         {0x3802, 0x00},
 164         {0x3803, 0x04},
 165         {0x3804, 0x0a},
 166         {0x3805, 0x3f},
 167         {0x3806, 0x07},
 168         {0x3807, 0xb3},
 169         {0x3808, 0x0a},
 170         {0x3809, 0x20},
 171         {0x380a, 0x07},
 172         {0x380b, 0x98},
 173         {0x380c, 0x02},
 174         {0x380d, 0xee},
 175         {0x380e, 0x07},
 176         {0x380f, 0xe4},
 177         {0x3811, 0x10},
 178         {0x3813, 0x0d},
 179         {0x3814, 0x01},
 180         {0x3815, 0x01},
 181         {0x3816, 0x01},
 182         {0x3817, 0x01},
 183         {0x381e, 0x02},
 184         {0x3820, 0x88},
 185         {0x3821, 0x01},
 186         {0x3832, 0x04},
 187         {0x3c80, 0x01},
 188         {0x3c82, 0x00},
 189         {0x3c83, 0xc8},
 190         {0x3c8c, 0x0f},
 191         {0x3c8d, 0xa0},
 192         {0x3c90, 0x07},
 193         {0x3c91, 0x00},
 194         {0x3c92, 0x00},
 195         {0x3c93, 0x00},
 196         {0x3c94, 0xd0},
 197         {0x3c95, 0x50},
 198         {0x3c96, 0x35},
 199         {0x3c97, 0x00},
 200         {0x4001, 0xe0},
 201         {0x4008, 0x02},
 202         {0x4009, 0x0d},
 203         {0x400f, 0x80},
 204         {0x4013, 0x02},
 205         {0x4040, 0x00},
 206         {0x4041, 0x07},
 207         {0x404c, 0x50},
 208         {0x404e, 0x20},
 209         {0x4500, 0x06},
 210         {0x4503, 0x00},
 211         {0x450a, 0x04},
 212         {0x4809, 0x04},
 213         {0x480c, 0x12},
 214         {0x4819, 0x70},
 215         {0x4825, 0x32},
 216         {0x4826, 0x32},
 217         {0x482a, 0x06},
 218         {0x4833, 0x08},
 219         {0x4837, 0x0d},
 220         {0x5000, 0x77},
 221         {0x5b00, 0x01},
 222         {0x5b01, 0x10},
 223         {0x5b02, 0x01},
 224         {0x5b03, 0xdb},
 225         {0x5b05, 0x6c},
 226         {0x5e10, 0xfc},
 227         {0x3500, 0x00},
 228         {0x3501, 0x3E},
 229         {0x3502, 0x60},
 230         {0x3503, 0x08},
 231         {0x3508, 0x04},
 232         {0x3509, 0x00},
 233         {0x3832, 0x48},
 234         {0x5780, 0x3e},
 235         {0x5781, 0x0f},
 236         {0x5782, 0x44},
 237         {0x5783, 0x02},
 238         {0x5784, 0x01},
 239         {0x5785, 0x01},
 240         {0x5786, 0x00},
 241         {0x5787, 0x04},
 242         {0x5788, 0x02},
 243         {0x5789, 0x0f},
 244         {0x578a, 0xfd},
 245         {0x578b, 0xf5},
 246         {0x578c, 0xf5},
 247         {0x578d, 0x03},
 248         {0x578e, 0x08},
 249         {0x578f, 0x0c},
 250         {0x5790, 0x08},
 251         {0x5791, 0x06},
 252         {0x5792, 0x00},
 253         {0x5793, 0x52},
 254         {0x5794, 0xa3},
 255         {0x4003, 0x40},
 256         {0x3107, 0x01},
 257         {0x3c80, 0x08},
 258         {0x3c83, 0xb1},
 259         {0x3c8c, 0x10},
 260         {0x3c8d, 0x00},
 261         {0x3c90, 0x00},
 262         {0x3c94, 0x00},
 263         {0x3c95, 0x00},
 264         {0x3c96, 0x00},
 265         {0x37cb, 0x09},
 266         {0x37cc, 0x15},
 267         {0x37cd, 0x1f},
 268         {0x37ce, 0x1f},
 269 };
 270
 271 static const struct ov5675_reg mode_1296x972_regs[] = {
 272         {0x3002, 0x21},
 273         {0x3107, 0x23},
 274         {0x3501, 0x20},
 275         {0x3503, 0x0c},
 276         {0x3508, 0x03},
 277         {0x3509, 0x00},
 278         {0x3600, 0x66},
 279         {0x3602, 0x30},
 280         {0x3610, 0xa5},
 281         {0x3612, 0x93},
 282         {0x3620, 0x80},
 283         {0x3642, 0x0e},
 284         {0x3661, 0x00},
 285         {0x3662, 0x08},
 286         {0x3664, 0xf3},
 287         {0x3665, 0x9e},
 288         {0x3667, 0xa5},
 289         {0x366e, 0x55},
 290         {0x366f, 0x55},
 291         {0x3670, 0x11},
 292         {0x3671, 0x11},
 293         {0x3672, 0x11},
 294         {0x3673, 0x11},
 295         {0x3714, 0x28},
 296         {0x371a, 0x3e},
 297         {0x3733, 0x10},
 298         {0x3734, 0x00},
 299         {0x373d, 0x24},
 300         {0x3764, 0x20},
 301         {0x3765, 0x20},
 302         {0x3766, 0x12},
 303         {0x37a1, 0x14},
 304         {0x37a8, 0x1c},
 305         {0x37ab, 0x0f},
 306         {0x37c2, 0x14},
 307         {0x37cb, 0x00},
 308         {0x37cc, 0x00},
 309         {0x37cd, 0x00},
 310         {0x37ce, 0x00},
 311         {0x37d8, 0x02},
 312         {0x37d9, 0x04},
 313         {0x37dc, 0x04},
 314         {0x3800, 0x00},
 315         {0x3801, 0x00},
 316         {0x3802, 0x00},
 317         {0x3803, 0xf4},
 318         {0x3804, 0x0a},
 319         {0x3805, 0x3f},
 320         {0x3806, 0x06},
 321         {0x3807, 0xb3},
 322         {0x3808, 0x05},
 323         {0x3809, 0x00},
 324         {0x380a, 0x02},
 325         {0x380b, 0xd0},
 326         {0x380c, 0x02},
 327         {0x380d, 0xee},
 328         {0x380e, 0x07},
 329         {0x380f, 0xe4},
 330         {0x3811, 0x10},
 331         {0x3813, 0x09},
 332         {0x3814, 0x03},
 333         {0x3815, 0x01},
 334         {0x3816, 0x03},
 335         {0x3817, 0x01},
 336         {0x381e, 0x02},
 337         {0x3820, 0x8b},
 338         {0x3821, 0x01},
 339         {0x3832, 0x04},
 340         {0x3c80, 0x01},
 341         {0x3c82, 0x00},
 342         {0x3c83, 0xc8},
 343         {0x3c8c, 0x0f},
 344         {0x3c8d, 0xa0},
 345         {0x3c90, 0x07},
 346         {0x3c91, 0x00},
 347         {0x3c92, 0x00},
 348         {0x3c93, 0x00},
 349         {0x3c94, 0xd0},
 350         {0x3c95, 0x50},
 351         {0x3c96, 0x35},
 352         {0x3c97, 0x00},
 353         {0x4001, 0xe0},
 354         {0x4008, 0x00},
 355         {0x4009, 0x07},
 356         {0x400f, 0x80},
 357         {0x4013, 0x02},
 358         {0x4040, 0x00},
 359         {0x4041, 0x03},
 360         {0x404c, 0x50},
 361         {0x404e, 0x20},
 362         {0x4500, 0x06},
 363         {0x4503, 0x00},
 364         {0x450a, 0x04},
 365         {0x4809, 0x04},
 366         {0x480c, 0x12},
 367         {0x4819, 0x70},
 368         {0x4825, 0x32},
 369         {0x4826, 0x32},
 370         {0x482a, 0x06},
 371         {0x4833, 0x08},
 372         {0x4837, 0x0d},
 373         {0x5000, 0x77},
 374         {0x5b00, 0x01},
 375         {0x5b01, 0x10},
 376         {0x5b02, 0x01},
 377         {0x5b03, 0xdb},
 378         {0x5b05, 0x6c},
 379         {0x5e10, 0xfc},
 380         {0x3500, 0x00},
 381         {0x3501, 0x1F},
 382         {0x3502, 0x20},
 383         {0x3503, 0x08},
 384         {0x3508, 0x04},
 385         {0x3509, 0x00},
 386         {0x3832, 0x48},
 387         {0x5780, 0x3e},
 388         {0x5781, 0x0f},
 389         {0x5782, 0x44},
 390         {0x5783, 0x02},
 391         {0x5784, 0x01},
 392         {0x5785, 0x01},
 393         {0x5786, 0x00},
 394         {0x5787, 0x04},
 395         {0x5788, 0x02},
 396         {0x5789, 0x0f},
 397         {0x578a, 0xfd},
 398         {0x578b, 0xf5},
 399         {0x578c, 0xf5},
 400         {0x578d, 0x03},
 401         {0x578e, 0x08},
 402         {0x578f, 0x0c},
 403         {0x5790, 0x08},
 404         {0x5791, 0x06},
 405         {0x5792, 0x00},
 406         {0x5793, 0x52},
 407         {0x5794, 0xa3},
 408         {0x4003, 0x40},
 409         {0x3107, 0x01},
 410         {0x3c80, 0x08},
 411         {0x3c83, 0xb1},
 412         {0x3c8c, 0x10},
 413         {0x3c8d, 0x00},
 414         {0x3c90, 0x00},
 415         {0x3c94, 0x00},
 416         {0x3c95, 0x00},
 417         {0x3c96, 0x00},
 418         {0x37cb, 0x09},
 419         {0x37cc, 0x15},
 420         {0x37cd, 0x1f},
 421         {0x37ce, 0x1f},
 422 };
 423
 424 static const char * const ov5675_test_pattern_menu[] = {
 425         "Disabled",
 426         "Standard Color Bar",
 427         "Top-Bottom Darker Color Bar",
 428         "Right-Left Darker Color Bar",
 429         "Bottom-Top Darker Color Bar"
 430 };
 431
 432 static const s64 link_freq_menu_items[] = {
 433         OV5675_LINK_FREQ_450MHZ,
 434 };
 435
 436 static const struct ov5675_link_freq_config link_freq_configs[] = {
 437         [OV5675_LINK_FREQ_900MBPS] = {
 438                 .reg_list = {
 439                         .num_of_regs = ARRAY_SIZE(mipi_data_rate_900mbps),
 440                         .regs = mipi_data_rate_900mbps,
 441                 }
 442         }
 443 };
 444
 445 static const struct ov5675_mode supported_modes[] = {
 446         {
 447                 .width = 2592,
 448                 .height = 1944,
 449                 .hts = 1500,
 450                 .vts_def = OV5675_VTS_30FPS,
 451                 .vts_min = OV5675_VTS_30FPS_MIN,
 452                 .reg_list = {
 453                         .num_of_regs = ARRAY_SIZE(mode_2592x1944_regs),
 454                         .regs = mode_2592x1944_regs,
 455                 },
 456                 .link_freq_index = OV5675_LINK_FREQ_900MBPS,
 457         },
 458         {
 459                 .width = 1296,
 460                 .height = 972,
 461                 .hts = 1500,
 462                 .vts_def = OV5675_VTS_30FPS,
 463                 .vts_min = OV5675_VTS_30FPS_MIN,
 464                 .reg_list = {
 465                         .num_of_regs = ARRAY_SIZE(mode_1296x972_regs),
 466                         .regs = mode_1296x972_regs,
 467                 },
 468                 .link_freq_index = OV5675_LINK_FREQ_900MBPS,
 469         }
 470 };
 471
 472 struct ov5675 {
 473         struct v4l2_subdev sd;
 474         struct media_pad pad;
 475         struct v4l2_ctrl_handler ctrl_handler;
 476
 477         /* V4L2 Controls */
 478         struct v4l2_ctrl *link_freq;
 479         struct v4l2_ctrl *pixel_rate;
 480         struct v4l2_ctrl *vblank;
 481         struct v4l2_ctrl *hblank;
 482         struct v4l2_ctrl *exposure;
 483
 484         /* Current mode */
 485         const struct ov5675_mode *cur_mode;
 486
 487         /* To serialize asynchronus callbacks */
 488         struct mutex mutex;
 489
 490         /* Streaming on/off */
 491         bool streaming;
 492 };
 493
 494 static u64 to_pixel_rate(u32 f_index)
 495 {
 496         u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV5675_DATA_LANES;
 497
 498         do_div(pixel_rate, OV5675_RGB_DEPTH);
 499
 500         return pixel_rate;
 501 }
 502
 503 static u64 to_pixels_per_line(u32 hts, u32 f_index)
 504 {
 505         u64 ppl = hts * to_pixel_rate(f_index);
 506
 507         do_div(ppl, OV5675_SCLK);
 508
 509         return ppl;
 510 }
 511
 512 static int ov5675_read_reg(struct ov5675 *ov5675, u16 reg, u16 len, u32 *val)
 513 {
 514         struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
 515         struct i2c_msg msgs[2];
 516         u8 addr_buf[2];
 517         u8 data_buf[4] = {0};
 518         int ret;
 519
 520         if (len > 4)
 521                 return -EINVAL;
 522
 523         put_unaligned_be16(reg, addr_buf);
 524         msgs[0].addr = client->addr;
 525         msgs[0].flags = 0;
 526         msgs[0].len = sizeof(addr_buf);
 527         msgs[0].buf = addr_buf;
 528         msgs[1].addr = client->addr;
 529         msgs[1].flags = I2C_M_RD;
 530         msgs[1].len = len;
 531         msgs[1].buf = &data_buf[4 - len];
 532
 533         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 534         if (ret != ARRAY_SIZE(msgs))
 535                 return -EIO;
 536
 537         *val = get_unaligned_be32(data_buf);
 538
 539         return 0;
 540 }
 541
 542 static int ov5675_write_reg(struct ov5675 *ov5675, u16 reg, u16 len, u32 val)
 543 {
 544         struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
 545         u8 buf[6];
 546
 547         if (len > 4)
 548                 return -EINVAL;
 549
 550         put_unaligned_be16(reg, buf);
 551         put_unaligned_be32(val << 8 * (4 - len), buf + 2);
 552         if (i2c_master_send(client, buf, len + 2) != len + 2)
 553                 return -EIO;
 554
 555         return 0;
 556 }
 557
 558 static int ov5675_write_reg_list(struct ov5675 *ov5675,
 559                                  const struct ov5675_reg_list *r_list)
 560 {
 561         struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
 562         unsigned int i;
 563         int ret;
 564
 565         for (i = 0; i < r_list->num_of_regs; i++) {
 566                 ret = ov5675_write_reg(ov5675, r_list->regs[i].address, 1,
 567                                        r_list->regs[i].val);
 568                 if (ret) {
 569                         dev_err_ratelimited(&client->dev,
 570                                     "failed to write reg 0x%4.4x. error = %d",
 571                                     r_list->regs[i].address, ret);
 572                         return ret;
 573                 }
 574         }
 575
 576         return 0;
 577 }
 578
 579 static int ov5675_update_digital_gain(struct ov5675 *ov5675, u32 d_gain)
 580 {
 581         int ret;
 582
 583         ret = ov5675_write_reg(ov5675, OV5675_REG_MWB_R_GAIN,
 584                                OV5675_REG_VALUE_16BIT, d_gain);
 585         if (ret)
 586                 return ret;
 587
 588         ret = ov5675_write_reg(ov5675, OV5675_REG_MWB_G_GAIN,
 589                                OV5675_REG_VALUE_16BIT, d_gain);
 590         if (ret)
 591                 return ret;
 592
 593         return ov5675_write_reg(ov5675, OV5675_REG_MWB_B_GAIN,
 594                                 OV5675_REG_VALUE_16BIT, d_gain);
 595 }
 596
 597 static int ov5675_test_pattern(struct ov5675 *ov5675, u32 pattern)
 598 {
 599         if (pattern)
 600                 pattern = (pattern - 1) << OV5675_TEST_PATTERN_BAR_SHIFT |
 601                           OV5675_TEST_PATTERN_ENABLE;
 602
 603         return ov5675_write_reg(ov5675, OV5675_REG_TEST_PATTERN,
 604                                 OV5675_REG_VALUE_08BIT, pattern);
 605 }
 606
 607 static int ov5675_set_ctrl(struct v4l2_ctrl *ctrl)
 608 {
 609         struct ov5675 *ov5675 = container_of(ctrl->handler,
 610                                              struct ov5675, ctrl_handler);
 611         struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
 612         s64 exposure_max;
 613         int ret = 0;
 614
 615         /* Propagate change of current control to all related controls */
 616         if (ctrl->id == V4L2_CID_VBLANK) {
 617                 /* Update max exposure while meeting expected vblanking */
 618                 exposure_max = (ov5675->cur_mode->height + ctrl->val -
 619                                OV5675_EXPOSURE_MAX_MARGIN) / 2;
 620                 __v4l2_ctrl_modify_range(ov5675->exposure,
 621                                          ov5675->exposure->minimum,
 622                                          exposure_max, ov5675->exposure->step,
 623                                          exposure_max);
 624         }
 625
 626         /* V4L2 controls values will be applied only when power is already up */
 627         if (!pm_runtime_get_if_in_use(&client->dev))
 628                 return 0;
 629
 630         switch (ctrl->id) {
 631         case V4L2_CID_ANALOGUE_GAIN:
 632                 ret = ov5675_write_reg(ov5675, OV5675_REG_ANALOG_GAIN,
 633                                        OV5675_REG_VALUE_16BIT, ctrl->val);
 634                 break;
 635
 636         case V4L2_CID_DIGITAL_GAIN:
 637                 ret = ov5675_update_digital_gain(ov5675, ctrl->val);
 638                 break;
 639
 640         case V4L2_CID_EXPOSURE:
 641                 /* 3 least significant bits of expsoure are fractional part */
 642                 ret = ov5675_write_reg(ov5675, OV5675_REG_EXPOSURE,
 643                                        OV5675_REG_VALUE_24BIT, ctrl->val << 3);
 644                 break;
 645
 646         case V4L2_CID_VBLANK:
 647                 ret = ov5675_write_reg(ov5675, OV5675_REG_VTS,
 648                                        OV5675_REG_VALUE_16BIT,
 649                                        ov5675->cur_mode->height + ctrl->val +
 650                                        10);
 651                 break;
 652
 653         case V4L2_CID_TEST_PATTERN:
 654                 ret = ov5675_test_pattern(ov5675, ctrl->val);
 655                 break;
 656
 657         default:
 658                 ret = -EINVAL;
 659                 break;
 660         }
 661
 662         pm_runtime_put(&client->dev);
 663
 664         return ret;
 665 }
 666
 667 static const struct v4l2_ctrl_ops ov5675_ctrl_ops = {
 668         .s_ctrl = ov5675_set_ctrl,
 669 };
 670
 671 static int ov5675_init_controls(struct ov5675 *ov5675)
 672 {
 673         struct v4l2_ctrl_handler *ctrl_hdlr;
 674         s64 exposure_max, h_blank;
 675         int ret;
 676
 677         ctrl_hdlr = &ov5675->ctrl_handler;
 678         ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
 679         if (ret)
 680                 return ret;
 681
 682         ctrl_hdlr->lock = &ov5675->mutex;
 683         ov5675->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov5675_ctrl_ops,
 684                                            V4L2_CID_LINK_FREQ,
 685                                            ARRAY_SIZE(link_freq_menu_items) - 1,
 686                                            0, link_freq_menu_items);
 687         if (ov5675->link_freq)
 688                 ov5675->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
 689
 690         ov5675->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops,
 691                                        V4L2_CID_PIXEL_RATE, 0,
 692                                        to_pixel_rate(OV5675_LINK_FREQ_900MBPS),
 693                                        1,
 694                                        to_pixel_rate(OV5675_LINK_FREQ_900MBPS));
 695         ov5675->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops,
 696                           V4L2_CID_VBLANK,
 697                           ov5675->cur_mode->vts_min - ov5675->cur_mode->height,
 698                           OV5675_VTS_MAX - ov5675->cur_mode->height, 1,
 699                           ov5675->cur_mode->vts_def - ov5675->cur_mode->height);
 700         h_blank = to_pixels_per_line(ov5675->cur_mode->hts,
 701                   ov5675->cur_mode->link_freq_index) - ov5675->cur_mode->width;
 702         ov5675->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops,
 703                                            V4L2_CID_HBLANK, h_blank, h_blank, 1,
 704                                            h_blank);
 705         if (ov5675->hblank)
 706                 ov5675->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
 707
 708         v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
 709                           OV5675_ANAL_GAIN_MIN, OV5675_ANAL_GAIN_MAX,
 710                           OV5675_ANAL_GAIN_STEP, OV5675_ANAL_GAIN_MIN);
 711         v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
 712                           OV5675_DGTL_GAIN_MIN, OV5675_DGTL_GAIN_MAX,
 713                           OV5675_DGTL_GAIN_STEP, OV5675_DGTL_GAIN_DEFAULT);
 714         exposure_max = (ov5675->cur_mode->vts_def -
 715                         OV5675_EXPOSURE_MAX_MARGIN) / 2;
 716         ov5675->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops,
 717                                              V4L2_CID_EXPOSURE,
 718                                              OV5675_EXPOSURE_MIN, exposure_max,
 719                                              OV5675_EXPOSURE_STEP,
 720                                              exposure_max);
 721         v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov5675_ctrl_ops,
 722                                      V4L2_CID_TEST_PATTERN,
 723                                      ARRAY_SIZE(ov5675_test_pattern_menu) - 1,
 724                                      0, 0, ov5675_test_pattern_menu);
 725         if (ctrl_hdlr->error)
 726                 return ctrl_hdlr->error;
 727
 728         ov5675->sd.ctrl_handler = ctrl_hdlr;
 729
 730         return 0;
 731 }
 732
 733 static void ov5675_update_pad_format(const struct ov5675_mode *mode,
 734                                      struct v4l2_mbus_framefmt *fmt)
 735 {
 736         fmt->width = mode->width;
 737         fmt->height = mode->height;
 738         fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
 739         fmt->field = V4L2_FIELD_NONE;
 740 }
 741
 742 static int ov5675_start_streaming(struct ov5675 *ov5675)
 743 {
 744         struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
 745         const struct ov5675_reg_list *reg_list;
 746         int link_freq_index, ret;
 747
 748         link_freq_index = ov5675->cur_mode->link_freq_index;
 749         reg_list = &link_freq_configs[link_freq_index].reg_list;
 750         ret = ov5675_write_reg_list(ov5675, reg_list);
 751         if (ret) {
 752                 dev_err(&client->dev, "failed to set plls");
 753                 return ret;
 754         }
 755
 756         reg_list = &ov5675->cur_mode->reg_list;
 757         ret = ov5675_write_reg_list(ov5675, reg_list);
 758         if (ret) {
 759                 dev_err(&client->dev, "failed to set mode");
 760                 return ret;
 761         }
 762
 763         ret = __v4l2_ctrl_handler_setup(ov5675->sd.ctrl_handler);
 764         if (ret)
 765                 return ret;
 766
 767         ret = ov5675_write_reg(ov5675, OV5675_REG_MODE_SELECT,
 768                                OV5675_REG_VALUE_08BIT, OV5675_MODE_STREAMING);
 769         if (ret) {
 770                 dev_err(&client->dev, "failed to set stream");
 771                 return ret;
 772         }
 773
 774         return 0;
 775 }
 776
 777 static void ov5675_stop_streaming(struct ov5675 *ov5675)
 778 {
 779         struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
 780
 781         if (ov5675_write_reg(ov5675, OV5675_REG_MODE_SELECT,
 782                              OV5675_REG_VALUE_08BIT, OV5675_MODE_STANDBY))
 783                 dev_err(&client->dev, "failed to set stream");
 784 }
 785
 786 static int ov5675_set_stream(struct v4l2_subdev *sd, int enable)
 787 {
 788         struct ov5675 *ov5675 = to_ov5675(sd);
 789         struct i2c_client *client = v4l2_get_subdevdata(sd);
 790         int ret = 0;
 791
 792         if (ov5675->streaming == enable)
 793                 return 0;
 794
 795         mutex_lock(&ov5675->mutex);
 796         if (enable) {
 797                 ret = pm_runtime_get_sync(&client->dev);
 798                 if (ret < 0) {
 799                         pm_runtime_put_noidle(&client->dev);
 800                         mutex_unlock(&ov5675->mutex);
 801                         return ret;
 802                 }
 803
 804                 ret = ov5675_start_streaming(ov5675);
 805                 if (ret) {
 806                         enable = 0;
 807                         ov5675_stop_streaming(ov5675);
 808                         pm_runtime_put(&client->dev);
 809                 }
 810         } else {
 811                 ov5675_stop_streaming(ov5675);
 812                 pm_runtime_put(&client->dev);
 813         }
 814
 815         ov5675->streaming = enable;
 816         mutex_unlock(&ov5675->mutex);
 817
 818         return ret;
 819 }
 820
 821 static int __maybe_unused ov5675_suspend(struct device *dev)
 822 {
 823         struct i2c_client *client = to_i2c_client(dev);
 824         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 825         struct ov5675 *ov5675 = to_ov5675(sd);
 826
 827         mutex_lock(&ov5675->mutex);
 828         if (ov5675->streaming)
 829                 ov5675_stop_streaming(ov5675);
 830
 831         mutex_unlock(&ov5675->mutex);
 832
 833         return 0;
 834 }
 835
 836 static int __maybe_unused ov5675_resume(struct device *dev)
 837 {
 838         struct i2c_client *client = to_i2c_client(dev);
 839         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 840         struct ov5675 *ov5675 = to_ov5675(sd);
 841         int ret;
 842
 843         mutex_lock(&ov5675->mutex);
 844         if (ov5675->streaming) {
 845                 ret = ov5675_start_streaming(ov5675);
 846                 if (ret) {
 847                         ov5675->streaming = false;
 848                         ov5675_stop_streaming(ov5675);
 849                         mutex_unlock(&ov5675->mutex);
 850                         return ret;
 851                 }
 852         }
 853
 854         mutex_unlock(&ov5675->mutex);
 855
 856         return 0;
 857 }
 858
 859 static int ov5675_set_format(struct v4l2_subdev *sd,
 860                              struct v4l2_subdev_pad_config *cfg,
 861                              struct v4l2_subdev_format *fmt)
 862 {
 863         struct ov5675 *ov5675 = to_ov5675(sd);
 864         const struct ov5675_mode *mode;
 865         s32 vblank_def, h_blank;
 866
 867         mode = v4l2_find_nearest_size(supported_modes,
 868                                       ARRAY_SIZE(supported_modes), width,
 869                                       height, fmt->format.width,
 870                                       fmt->format.height);
 871
 872         mutex_lock(&ov5675->mutex);
 873         ov5675_update_pad_format(mode, &fmt->format);
 874         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 875                 *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
 876         } else {
 877                 ov5675->cur_mode = mode;
 878                 __v4l2_ctrl_s_ctrl(ov5675->link_freq, mode->link_freq_index);
 879                 __v4l2_ctrl_s_ctrl_int64(ov5675->pixel_rate,
 880                                          to_pixel_rate(mode->link_freq_index));
 881
 882                 /* Update limits and set FPS to default */
 883                 vblank_def = mode->vts_def - mode->height;
 884                 __v4l2_ctrl_modify_range(ov5675->vblank,
 885                                          mode->vts_min - mode->height,
 886                                          OV5675_VTS_MAX - mode->height, 1,
 887                                          vblank_def);
 888                 __v4l2_ctrl_s_ctrl(ov5675->vblank, vblank_def);
 889                 h_blank = to_pixels_per_line(mode->hts, mode->link_freq_index) -
 890                           mode->width;
 891                 __v4l2_ctrl_modify_range(ov5675->hblank, h_blank, h_blank, 1,
 892                                          h_blank);
 893         }
 894
 895         mutex_unlock(&ov5675->mutex);
 896
 897         return 0;
 898 }
 899
 900 static int ov5675_get_format(struct v4l2_subdev *sd,
 901                              struct v4l2_subdev_pad_config *cfg,
 902                              struct v4l2_subdev_format *fmt)
 903 {
 904         struct ov5675 *ov5675 = to_ov5675(sd);
 905
 906         mutex_lock(&ov5675->mutex);
 907         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
 908                 fmt->format = *v4l2_subdev_get_try_format(&ov5675->sd, cfg,
 909                                                           fmt->pad);
 910         else
 911                 ov5675_update_pad_format(ov5675->cur_mode, &fmt->format);
 912
 913         mutex_unlock(&ov5675->mutex);
 914
 915         return 0;
 916 }
 917
 918 static int ov5675_enum_mbus_code(struct v4l2_subdev *sd,
 919                                  struct v4l2_subdev_pad_config *cfg,
 920                                  struct v4l2_subdev_mbus_code_enum *code)
 921 {
 922         if (code->index > 0)
 923                 return -EINVAL;
 924
 925         code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
 926
 927         return 0;
 928 }
 929
 930 static int ov5675_enum_frame_size(struct v4l2_subdev *sd,
 931                                   struct v4l2_subdev_pad_config *cfg,
 932                                   struct v4l2_subdev_frame_size_enum *fse)
 933 {
 934         if (fse->index >= ARRAY_SIZE(supported_modes))
 935                 return -EINVAL;
 936
 937         if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10)
 938                 return -EINVAL;
 939
 940         fse->min_width = supported_modes[fse->index].width;
 941         fse->max_width = fse->min_width;
 942         fse->min_height = supported_modes[fse->index].height;
 943         fse->max_height = fse->min_height;
 944
 945         return 0;
 946 }
 947
 948 static int ov5675_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 949 {
 950         struct ov5675 *ov5675 = to_ov5675(sd);
 951
 952         mutex_lock(&ov5675->mutex);
 953         ov5675_update_pad_format(&supported_modes[0],
 954                                  v4l2_subdev_get_try_format(sd, fh->pad, 0));
 955         mutex_unlock(&ov5675->mutex);
 956
 957         return 0;
 958 }
 959
 960 static const struct v4l2_subdev_video_ops ov5675_video_ops = {
 961         .s_stream = ov5675_set_stream,
 962 };
 963
 964 static const struct v4l2_subdev_pad_ops ov5675_pad_ops = {
 965         .set_fmt = ov5675_set_format,
 966         .get_fmt = ov5675_get_format,
 967         .enum_mbus_code = ov5675_enum_mbus_code,
 968         .enum_frame_size = ov5675_enum_frame_size,
 969 };
 970
 971 static const struct v4l2_subdev_ops ov5675_subdev_ops = {
 972         .video = &ov5675_video_ops,
 973         .pad = &ov5675_pad_ops,
 974 };
 975
 976 static const struct media_entity_operations ov5675_subdev_entity_ops = {
 977         .link_validate = v4l2_subdev_link_validate,
 978 };
 979
 980 static const struct v4l2_subdev_internal_ops ov5675_internal_ops = {
 981         .open = ov5675_open,
 982 };
 983
 984 static int ov5675_identify_module(struct ov5675 *ov5675)
 985 {
 986         struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
 987         int ret;
 988         u32 val;
 989
 990         ret = ov5675_read_reg(ov5675, OV5675_REG_CHIP_ID,
 991                               OV5675_REG_VALUE_24BIT, &val);
 992         if (ret)
 993                 return ret;
 994
 995         if (val != OV5675_CHIP_ID) {
 996                 dev_err(&client->dev, "chip id mismatch: %x!=%x",
 997                         OV5675_CHIP_ID, val);
 998                 return -ENXIO;
 999         }
1000
1001         return 0;
1002 }
1003
1004 static int ov5675_check_hwcfg(struct device *dev)
1005 {
1006         struct fwnode_handle *ep;
1007         struct fwnode_handle *fwnode = dev_fwnode(dev);
1008         struct v4l2_fwnode_endpoint bus_cfg = {
1009                 .bus_type = V4L2_MBUS_CSI2_DPHY
1010         };
1011         u32 mclk;
1012         int ret;
1013         unsigned int i, j;
1014
1015         if (!fwnode)
1016                 return -ENXIO;
1017
1018         ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk);
1019
1020         if (ret) {
1021                 dev_err(dev, "can't get clock frequency");
1022                 return ret;
1023         }
1024
1025         if (mclk != OV5675_MCLK) {
1026                 dev_err(dev, "external clock %d is not supported", mclk);
1027                 return -EINVAL;
1028         }
1029
1030         ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
1031         if (!ep)
1032                 return -ENXIO;
1033
1034         ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
1035         fwnode_handle_put(ep);
1036         if (ret)
1037                 return ret;
1038
1039         if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV5675_DATA_LANES) {
1040                 dev_err(dev, "number of CSI2 data lanes %d is not supported",
1041                         bus_cfg.bus.mipi_csi2.num_data_lanes);
1042                 ret = -EINVAL;
1043                 goto check_hwcfg_error;
1044         }
1045
1046         if (!bus_cfg.nr_of_link_frequencies) {
1047                 dev_err(dev, "no link frequencies defined");
1048                 ret = -EINVAL;
1049                 goto check_hwcfg_error;
1050         }
1051
1052         for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
1053                 for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
1054                         if (link_freq_menu_items[i] ==
1055                                 bus_cfg.link_frequencies[j])
1056                                 break;
1057                 }
1058
1059                 if (j == bus_cfg.nr_of_link_frequencies) {
1060                         dev_err(dev, "no link frequency %lld supported",
1061                                 link_freq_menu_items[i]);
1062                         ret = -EINVAL;
1063                         goto check_hwcfg_error;
1064                 }
1065         }
1066
1067 check_hwcfg_error:
1068         v4l2_fwnode_endpoint_free(&bus_cfg);
1069
1070         return ret;
1071 }
1072
1073 static int ov5675_remove(struct i2c_client *client)
1074 {
1075         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1076         struct ov5675 *ov5675 = to_ov5675(sd);
1077
1078         v4l2_async_unregister_subdev(sd);
1079         media_entity_cleanup(&sd->entity);
1080         v4l2_ctrl_handler_free(sd->ctrl_handler);
1081         pm_runtime_disable(&client->dev);
1082         mutex_destroy(&ov5675->mutex);
1083
1084         return 0;
1085 }
1086
1087 static int ov5675_probe(struct i2c_client *client)
1088 {
1089         struct ov5675 *ov5675;
1090         int ret;
1091
1092         ret = ov5675_check_hwcfg(&client->dev);
1093         if (ret) {
1094                 dev_err(&client->dev, "failed to check HW configuration: %d",
1095                         ret);
1096                 return ret;
1097         }
1098
1099         ov5675 = devm_kzalloc(&client->dev, sizeof(*ov5675), GFP_KERNEL);
1100         if (!ov5675)
1101                 return -ENOMEM;
1102
1103         v4l2_i2c_subdev_init(&ov5675->sd, client, &ov5675_subdev_ops);
1104         ret = ov5675_identify_module(ov5675);
1105         if (ret) {
1106                 dev_err(&client->dev, "failed to find sensor: %d", ret);
1107                 return ret;
1108         }
1109
1110         mutex_init(&ov5675->mutex);
1111         ov5675->cur_mode = &supported_modes[0];
1112         ret = ov5675_init_controls(ov5675);
1113         if (ret) {
1114                 dev_err(&client->dev, "failed to init controls: %d", ret);
1115                 goto probe_error_v4l2_ctrl_handler_free;
1116         }
1117
1118         ov5675->sd.internal_ops = &ov5675_internal_ops;
1119         ov5675->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1120         ov5675->sd.entity.ops = &ov5675_subdev_entity_ops;
1121         ov5675->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1122         ov5675->pad.flags = MEDIA_PAD_FL_SOURCE;
1123         ret = media_entity_pads_init(&ov5675->sd.entity, 1, &ov5675->pad);
1124         if (ret) {
1125                 dev_err(&client->dev, "failed to init entity pads: %d", ret);
1126                 goto probe_error_v4l2_ctrl_handler_free;
1127         }
1128
1129         ret = v4l2_async_register_subdev_sensor_common(&ov5675->sd);
1130         if (ret < 0) {
1131                 dev_err(&client->dev, "failed to register V4L2 subdev: %d",
1132                         ret);
1133                 goto probe_error_media_entity_cleanup;
1134         }
1135
1136         /*
1137          * Device is already turned on by i2c-core with ACPI domain PM.
1138          * Enable runtime PM and turn off the device.
1139          */
1140         pm_runtime_set_active(&client->dev);
1141         pm_runtime_enable(&client->dev);
1142         pm_runtime_idle(&client->dev);
1143
1144         return 0;
1145
1146 probe_error_media_entity_cleanup:
1147         media_entity_cleanup(&ov5675->sd.entity);
1148
1149 probe_error_v4l2_ctrl_handler_free:
1150         v4l2_ctrl_handler_free(ov5675->sd.ctrl_handler);
1151         mutex_destroy(&ov5675->mutex);
1152
1153         return ret;
1154 }
1155
1156 static const struct dev_pm_ops ov5675_pm_ops = {
1157         SET_SYSTEM_SLEEP_PM_OPS(ov5675_suspend, ov5675_resume)
1158 };
1159
1160 #ifdef CONFIG_ACPI
1161 static const struct acpi_device_id ov5675_acpi_ids[] = {
1162         {"OVTI5675"},
1163         {}
1164 };
1165
1166 MODULE_DEVICE_TABLE(acpi, ov5675_acpi_ids);
1167 #endif
1168
1169 static struct i2c_driver ov5675_i2c_driver = {
1170         .driver = {
1171                 .name = "ov5675",
1172                 .pm = &ov5675_pm_ops,
1173                 .acpi_match_table = ACPI_PTR(ov5675_acpi_ids),
1174         },
1175         .probe_new = ov5675_probe,
1176         .remove = ov5675_remove,
1177 };
1178
1179 module_i2c_driver(ov5675_i2c_driver);
1180
1181 MODULE_AUTHOR("Shawn Tu <shawnx.tu@intel.com>");
1182 MODULE_DESCRIPTION("OmniVision OV5675 sensor driver");
1183 MODULE_LICENSE("GPL v2");