drivers/media/i2c/imx412.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Sony imx412 Camera Sensor Driver
   4  *
   5  * Copyright (C) 2021 Intel Corporation
   6  */
   7 #include <asm/unaligned.h>
   8
   9 #include <linux/clk.h>
  10 #include <linux/delay.h>
  11 #include <linux/i2c.h>
  12 #include <linux/module.h>
  13 #include <linux/pm_runtime.h>
  14 #include <linux/regulator/consumer.h>
  15
  16 #include <media/v4l2-ctrls.h>
  17 #include <media/v4l2-fwnode.h>
  18 #include <media/v4l2-subdev.h>
  19
  20 /* Streaming Mode */
  21 #define IMX412_REG_MODE_SELECT  0x0100
  22 #define IMX412_MODE_STANDBY     0x00
  23 #define IMX412_MODE_STREAMING   0x01
  24
  25 /* Lines per frame */
  26 #define IMX412_REG_LPFR         0x0340
  27
  28 /* Chip ID */
  29 #define IMX412_REG_ID           0x0016
  30 #define IMX412_ID               0x577
  31
  32 /* Exposure control */
  33 #define IMX412_REG_EXPOSURE_CIT 0x0202
  34 #define IMX412_EXPOSURE_MIN     8
  35 #define IMX412_EXPOSURE_OFFSET  22
  36 #define IMX412_EXPOSURE_STEP    1
  37 #define IMX412_EXPOSURE_DEFAULT 0x0648
  38
  39 /* Analog gain control */
  40 #define IMX412_REG_AGAIN        0x0204
  41 #define IMX412_AGAIN_MIN        0
  42 #define IMX412_AGAIN_MAX        978
  43 #define IMX412_AGAIN_STEP       1
  44 #define IMX412_AGAIN_DEFAULT    0
  45
  46 /* Group hold register */
  47 #define IMX412_REG_HOLD         0x0104
  48
  49 /* Input clock rate */
  50 #define IMX412_INCLK_RATE       24000000
  51
  52 /* CSI2 HW configuration */
  53 #define IMX412_LINK_FREQ        600000000
  54 #define IMX412_NUM_DATA_LANES   4
  55
  56 #define IMX412_REG_MIN          0x00
  57 #define IMX412_REG_MAX          0xffff
  58
  59 /**
  60  * struct imx412_reg - imx412 sensor register
  61  * @address: Register address
  62  * @val: Register value
  63  */
  64 struct imx412_reg {
  65         u16 address;
  66         u8 val;
  67 };
  68
  69 /**
  70  * struct imx412_reg_list - imx412 sensor register list
  71  * @num_of_regs: Number of registers in the list
  72  * @regs: Pointer to register list
  73  */
  74 struct imx412_reg_list {
  75         u32 num_of_regs;
  76         const struct imx412_reg *regs;
  77 };
  78
  79 /**
  80  * struct imx412_mode - imx412 sensor mode structure
  81  * @width: Frame width
  82  * @height: Frame height
  83  * @code: Format code
  84  * @hblank: Horizontal blanking in lines
  85  * @vblank: Vertical blanking in lines
  86  * @vblank_min: Minimum vertical blanking in lines
  87  * @vblank_max: Maximum vertical blanking in lines
  88  * @pclk: Sensor pixel clock
  89  * @link_freq_idx: Link frequency index
  90  * @reg_list: Register list for sensor mode
  91  */
  92 struct imx412_mode {
  93         u32 width;
  94         u32 height;
  95         u32 code;
  96         u32 hblank;
  97         u32 vblank;
  98         u32 vblank_min;
  99         u32 vblank_max;
 100         u64 pclk;
 101         u32 link_freq_idx;
 102         struct imx412_reg_list reg_list;
 103 };
 104
 105 static const char * const imx412_supply_names[] = {
 106         "dovdd",        /* Digital I/O power */
 107         "avdd",         /* Analog power */
 108         "dvdd",         /* Digital core power */
 109 };
 110
 111 /**
 112  * struct imx412 - imx412 sensor device structure
 113  * @dev: Pointer to generic device
 114  * @client: Pointer to i2c client
 115  * @sd: V4L2 sub-device
 116  * @pad: Media pad. Only one pad supported
 117  * @reset_gpio: Sensor reset gpio
 118  * @inclk: Sensor input clock
 119  * @supplies: Regulator supplies
 120  * @ctrl_handler: V4L2 control handler
 121  * @link_freq_ctrl: Pointer to link frequency control
 122  * @pclk_ctrl: Pointer to pixel clock control
 123  * @hblank_ctrl: Pointer to horizontal blanking control
 124  * @vblank_ctrl: Pointer to vertical blanking control
 125  * @exp_ctrl: Pointer to exposure control
 126  * @again_ctrl: Pointer to analog gain control
 127  * @vblank: Vertical blanking in lines
 128  * @cur_mode: Pointer to current selected sensor mode
 129  * @mutex: Mutex for serializing sensor controls
 130  * @streaming: Flag indicating streaming state
 131  */
 132 struct imx412 {
 133         struct device *dev;
 134         struct i2c_client *client;
 135         struct v4l2_subdev sd;
 136         struct media_pad pad;
 137         struct gpio_desc *reset_gpio;
 138         struct clk *inclk;
 139         struct regulator_bulk_data supplies[ARRAY_SIZE(imx412_supply_names)];
 140         struct v4l2_ctrl_handler ctrl_handler;
 141         struct v4l2_ctrl *link_freq_ctrl;
 142         struct v4l2_ctrl *pclk_ctrl;
 143         struct v4l2_ctrl *hblank_ctrl;
 144         struct v4l2_ctrl *vblank_ctrl;
 145         struct {
 146                 struct v4l2_ctrl *exp_ctrl;
 147                 struct v4l2_ctrl *again_ctrl;
 148         };
 149         u32 vblank;
 150         const struct imx412_mode *cur_mode;
 151         struct mutex mutex;
 152         bool streaming;
 153 };
 154
 155 static const s64 link_freq[] = {
 156         IMX412_LINK_FREQ,
 157 };
 158
 159 /* Sensor mode registers */
 160 static const struct imx412_reg mode_4056x3040_regs[] = {
 161         {0x0136, 0x18},
 162         {0x0137, 0x00},
 163         {0x3c7e, 0x08},
 164         {0x3c7f, 0x02},
 165         {0x38a8, 0x1f},
 166         {0x38a9, 0xff},
 167         {0x38aa, 0x1f},
 168         {0x38ab, 0xff},
 169         {0x55d4, 0x00},
 170         {0x55d5, 0x00},
 171         {0x55d6, 0x07},
 172         {0x55d7, 0xff},
 173         {0x55e8, 0x07},
 174         {0x55e9, 0xff},
 175         {0x55ea, 0x00},
 176         {0x55eb, 0x00},
 177         {0x575c, 0x07},
 178         {0x575d, 0xff},
 179         {0x575e, 0x00},
 180         {0x575f, 0x00},
 181         {0x5764, 0x00},
 182         {0x5765, 0x00},
 183         {0x5766, 0x07},
 184         {0x5767, 0xff},
 185         {0x5974, 0x04},
 186         {0x5975, 0x01},
 187         {0x5f10, 0x09},
 188         {0x5f11, 0x92},
 189         {0x5f12, 0x32},
 190         {0x5f13, 0x72},
 191         {0x5f14, 0x16},
 192         {0x5f15, 0xba},
 193         {0x5f17, 0x13},
 194         {0x5f18, 0x24},
 195         {0x5f19, 0x60},
 196         {0x5f1a, 0xe3},
 197         {0x5f1b, 0xad},
 198         {0x5f1c, 0x74},
 199         {0x5f2d, 0x25},
 200         {0x5f5c, 0xd0},
 201         {0x6a22, 0x00},
 202         {0x6a23, 0x1d},
 203         {0x7ba8, 0x00},
 204         {0x7ba9, 0x00},
 205         {0x886b, 0x00},
 206         {0x9002, 0x0a},
 207         {0x9004, 0x1a},
 208         {0x9214, 0x93},
 209         {0x9215, 0x69},
 210         {0x9216, 0x93},
 211         {0x9217, 0x6b},
 212         {0x9218, 0x93},
 213         {0x9219, 0x6d},
 214         {0x921a, 0x57},
 215         {0x921b, 0x58},
 216         {0x921c, 0x57},
 217         {0x921d, 0x59},
 218         {0x921e, 0x57},
 219         {0x921f, 0x5a},
 220         {0x9220, 0x57},
 221         {0x9221, 0x5b},
 222         {0x9222, 0x93},
 223         {0x9223, 0x02},
 224         {0x9224, 0x93},
 225         {0x9225, 0x03},
 226         {0x9226, 0x93},
 227         {0x9227, 0x04},
 228         {0x9228, 0x93},
 229         {0x9229, 0x05},
 230         {0x922a, 0x98},
 231         {0x922b, 0x21},
 232         {0x922c, 0xb2},
 233         {0x922d, 0xdb},
 234         {0x922e, 0xb2},
 235         {0x922f, 0xdc},
 236         {0x9230, 0xb2},
 237         {0x9231, 0xdd},
 238         {0x9232, 0xe2},
 239         {0x9233, 0xe1},
 240         {0x9234, 0xb2},
 241         {0x9235, 0xe2},
 242         {0x9236, 0xb2},
 243         {0x9237, 0xe3},
 244         {0x9238, 0xb7},
 245         {0x9239, 0xb9},
 246         {0x923a, 0xb7},
 247         {0x923b, 0xbb},
 248         {0x923c, 0xb7},
 249         {0x923d, 0xbc},
 250         {0x923e, 0xb7},
 251         {0x923f, 0xc5},
 252         {0x9240, 0xb7},
 253         {0x9241, 0xc7},
 254         {0x9242, 0xb7},
 255         {0x9243, 0xc9},
 256         {0x9244, 0x98},
 257         {0x9245, 0x56},
 258         {0x9246, 0x98},
 259         {0x9247, 0x55},
 260         {0x9380, 0x00},
 261         {0x9381, 0x62},
 262         {0x9382, 0x00},
 263         {0x9383, 0x56},
 264         {0x9384, 0x00},
 265         {0x9385, 0x52},
 266         {0x9388, 0x00},
 267         {0x9389, 0x55},
 268         {0x938a, 0x00},
 269         {0x938b, 0x55},
 270         {0x938c, 0x00},
 271         {0x938d, 0x41},
 272         {0x5078, 0x01},
 273         {0x0112, 0x0a},
 274         {0x0113, 0x0a},
 275         {0x0114, 0x03},
 276         {0x0342, 0x11},
 277         {0x0343, 0xa0},
 278         {0x0340, 0x0d},
 279         {0x0341, 0xda},
 280         {0x3210, 0x00},
 281         {0x0344, 0x00},
 282         {0x0345, 0x00},
 283         {0x0346, 0x00},
 284         {0x0347, 0x00},
 285         {0x0348, 0x0f},
 286         {0x0349, 0xd7},
 287         {0x034a, 0x0b},
 288         {0x034b, 0xdf},
 289         {0x00e3, 0x00},
 290         {0x00e4, 0x00},
 291         {0x00e5, 0x01},
 292         {0x00fc, 0x0a},
 293         {0x00fd, 0x0a},
 294         {0x00fe, 0x0a},
 295         {0x00ff, 0x0a},
 296         {0xe013, 0x00},
 297         {0x0220, 0x00},
 298         {0x0221, 0x11},
 299         {0x0381, 0x01},
 300         {0x0383, 0x01},
 301         {0x0385, 0x01},
 302         {0x0387, 0x01},
 303         {0x0900, 0x00},
 304         {0x0901, 0x11},
 305         {0x0902, 0x00},
 306         {0x3140, 0x02},
 307         {0x3241, 0x11},
 308         {0x3250, 0x03},
 309         {0x3e10, 0x00},
 310         {0x3e11, 0x00},
 311         {0x3f0d, 0x00},
 312         {0x3f42, 0x00},
 313         {0x3f43, 0x00},
 314         {0x0401, 0x00},
 315         {0x0404, 0x00},
 316         {0x0405, 0x10},
 317         {0x0408, 0x00},
 318         {0x0409, 0x00},
 319         {0x040a, 0x00},
 320         {0x040b, 0x00},
 321         {0x040c, 0x0f},
 322         {0x040d, 0xd8},
 323         {0x040e, 0x0b},
 324         {0x040f, 0xe0},
 325         {0x034c, 0x0f},
 326         {0x034d, 0xd8},
 327         {0x034e, 0x0b},
 328         {0x034f, 0xe0},
 329         {0x0301, 0x05},
 330         {0x0303, 0x02},
 331         {0x0305, 0x04},
 332         {0x0306, 0x00},
 333         {0x0307, 0xc8},
 334         {0x0309, 0x0a},
 335         {0x030b, 0x01},
 336         {0x030d, 0x02},
 337         {0x030e, 0x01},
 338         {0x030f, 0x5e},
 339         {0x0310, 0x00},
 340         {0x0820, 0x12},
 341         {0x0821, 0xc0},
 342         {0x0822, 0x00},
 343         {0x0823, 0x00},
 344         {0x3e20, 0x01},
 345         {0x3e37, 0x00},
 346         {0x3f50, 0x00},
 347         {0x3f56, 0x00},
 348         {0x3f57, 0xe2},
 349         {0x3c0a, 0x5a},
 350         {0x3c0b, 0x55},
 351         {0x3c0c, 0x28},
 352         {0x3c0d, 0x07},
 353         {0x3c0e, 0xff},
 354         {0x3c0f, 0x00},
 355         {0x3c10, 0x00},
 356         {0x3c11, 0x02},
 357         {0x3c12, 0x00},
 358         {0x3c13, 0x03},
 359         {0x3c14, 0x00},
 360         {0x3c15, 0x00},
 361         {0x3c16, 0x0c},
 362         {0x3c17, 0x0c},
 363         {0x3c18, 0x0c},
 364         {0x3c19, 0x0a},
 365         {0x3c1a, 0x0a},
 366         {0x3c1b, 0x0a},
 367         {0x3c1c, 0x00},
 368         {0x3c1d, 0x00},
 369         {0x3c1e, 0x00},
 370         {0x3c1f, 0x00},
 371         {0x3c20, 0x00},
 372         {0x3c21, 0x00},
 373         {0x3c22, 0x3f},
 374         {0x3c23, 0x0a},
 375         {0x3e35, 0x01},
 376         {0x3f4a, 0x03},
 377         {0x3f4b, 0xbf},
 378         {0x3f26, 0x00},
 379         {0x0202, 0x0d},
 380         {0x0203, 0xc4},
 381         {0x0204, 0x00},
 382         {0x0205, 0x00},
 383         {0x020e, 0x01},
 384         {0x020f, 0x00},
 385         {0x0210, 0x01},
 386         {0x0211, 0x00},
 387         {0x0212, 0x01},
 388         {0x0213, 0x00},
 389         {0x0214, 0x01},
 390         {0x0215, 0x00},
 391         {0xbcf1, 0x00},
 392 };
 393
 394 /* Supported sensor mode configurations */
 395 static const struct imx412_mode supported_mode = {
 396         .width = 4056,
 397         .height = 3040,
 398         .hblank = 456,
 399         .vblank = 506,
 400         .vblank_min = 506,
 401         .vblank_max = 32420,
 402         .pclk = 480000000,
 403         .link_freq_idx = 0,
 404         .code = MEDIA_BUS_FMT_SRGGB10_1X10,
 405         .reg_list = {
 406                 .num_of_regs = ARRAY_SIZE(mode_4056x3040_regs),
 407                 .regs = mode_4056x3040_regs,
 408         },
 409 };
 410
 411 /**
 412  * to_imx412() - imx412 V4L2 sub-device to imx412 device.
 413  * @subdev: pointer to imx412 V4L2 sub-device
 414  *
 415  * Return: pointer to imx412 device
 416  */
 417 static inline struct imx412 *to_imx412(struct v4l2_subdev *subdev)
 418 {
 419         return container_of(subdev, struct imx412, sd);
 420 }
 421
 422 /**
 423  * imx412_read_reg() - Read registers.
 424  * @imx412: pointer to imx412 device
 425  * @reg: register address
 426  * @len: length of bytes to read. Max supported bytes is 4
 427  * @val: pointer to register value to be filled.
 428  *
 429  * Return: 0 if successful, error code otherwise.
 430  */
 431 static int imx412_read_reg(struct imx412 *imx412, u16 reg, u32 len, u32 *val)
 432 {
 433         struct i2c_client *client = v4l2_get_subdevdata(&imx412->sd);
 434         struct i2c_msg msgs[2] = {0};
 435         u8 addr_buf[2] = {0};
 436         u8 data_buf[4] = {0};
 437         int ret;
 438
 439         if (WARN_ON(len > 4))
 440                 return -EINVAL;
 441
 442         put_unaligned_be16(reg, addr_buf);
 443
 444         /* Write register address */
 445         msgs[0].addr = client->addr;
 446         msgs[0].flags = 0;
 447         msgs[0].len = ARRAY_SIZE(addr_buf);
 448         msgs[0].buf = addr_buf;
 449
 450         /* Read data from register */
 451         msgs[1].addr = client->addr;
 452         msgs[1].flags = I2C_M_RD;
 453         msgs[1].len = len;
 454         msgs[1].buf = &data_buf[4 - len];
 455
 456         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 457         if (ret != ARRAY_SIZE(msgs))
 458                 return -EIO;
 459
 460         *val = get_unaligned_be32(data_buf);
 461
 462         return 0;
 463 }
 464
 465 /**
 466  * imx412_write_reg() - Write register
 467  * @imx412: pointer to imx412 device
 468  * @reg: register address
 469  * @len: length of bytes. Max supported bytes is 4
 470  * @val: register value
 471  *
 472  * Return: 0 if successful, error code otherwise.
 473  */
 474 static int imx412_write_reg(struct imx412 *imx412, u16 reg, u32 len, u32 val)
 475 {
 476         struct i2c_client *client = v4l2_get_subdevdata(&imx412->sd);
 477         u8 buf[6] = {0};
 478
 479         if (WARN_ON(len > 4))
 480                 return -EINVAL;
 481
 482         put_unaligned_be16(reg, buf);
 483         put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
 484         if (i2c_master_send(client, buf, len + 2) != len + 2)
 485                 return -EIO;
 486
 487         return 0;
 488 }
 489
 490 /**
 491  * imx412_write_regs() - Write a list of registers
 492  * @imx412: pointer to imx412 device
 493  * @regs: list of registers to be written
 494  * @len: length of registers array
 495  *
 496  * Return: 0 if successful, error code otherwise.
 497  */
 498 static int imx412_write_regs(struct imx412 *imx412,
 499                              const struct imx412_reg *regs, u32 len)
 500 {
 501         unsigned int i;
 502         int ret;
 503
 504         for (i = 0; i < len; i++) {
 505                 ret = imx412_write_reg(imx412, regs[i].address, 1, regs[i].val);
 506                 if (ret)
 507                         return ret;
 508         }
 509
 510         return 0;
 511 }
 512
 513 /**
 514  * imx412_update_controls() - Update control ranges based on streaming mode
 515  * @imx412: pointer to imx412 device
 516  * @mode: pointer to imx412_mode sensor mode
 517  *
 518  * Return: 0 if successful, error code otherwise.
 519  */
 520 static int imx412_update_controls(struct imx412 *imx412,
 521                                   const struct imx412_mode *mode)
 522 {
 523         int ret;
 524
 525         ret = __v4l2_ctrl_s_ctrl(imx412->link_freq_ctrl, mode->link_freq_idx);
 526         if (ret)
 527                 return ret;
 528
 529         ret = __v4l2_ctrl_s_ctrl(imx412->hblank_ctrl, mode->hblank);
 530         if (ret)
 531                 return ret;
 532
 533         return __v4l2_ctrl_modify_range(imx412->vblank_ctrl, mode->vblank_min,
 534                                         mode->vblank_max, 1, mode->vblank);
 535 }
 536
 537 /**
 538  * imx412_update_exp_gain() - Set updated exposure and gain
 539  * @imx412: pointer to imx412 device
 540  * @exposure: updated exposure value
 541  * @gain: updated analog gain value
 542  *
 543  * Return: 0 if successful, error code otherwise.
 544  */
 545 static int imx412_update_exp_gain(struct imx412 *imx412, u32 exposure, u32 gain)
 546 {
 547         u32 lpfr, shutter;
 548         int ret;
 549
 550         lpfr = imx412->vblank + imx412->cur_mode->height;
 551         shutter = lpfr - exposure;
 552
 553         dev_dbg(imx412->dev, "Set exp %u, analog gain %u, shutter %u, lpfr %u",
 554                 exposure, gain, shutter, lpfr);
 555
 556         ret = imx412_write_reg(imx412, IMX412_REG_HOLD, 1, 1);
 557         if (ret)
 558                 return ret;
 559
 560         ret = imx412_write_reg(imx412, IMX412_REG_LPFR, 2, lpfr);
 561         if (ret)
 562                 goto error_release_group_hold;
 563
 564         ret = imx412_write_reg(imx412, IMX412_REG_EXPOSURE_CIT, 2, shutter);
 565         if (ret)
 566                 goto error_release_group_hold;
 567
 568         ret = imx412_write_reg(imx412, IMX412_REG_AGAIN, 2, gain);
 569
 570 error_release_group_hold:
 571         imx412_write_reg(imx412, IMX412_REG_HOLD, 1, 0);
 572
 573         return ret;
 574 }
 575
 576 /**
 577  * imx412_set_ctrl() - Set subdevice control
 578  * @ctrl: pointer to v4l2_ctrl structure
 579  *
 580  * Supported controls:
 581  * - V4L2_CID_VBLANK
 582  * - cluster controls:
 583  *   - V4L2_CID_ANALOGUE_GAIN
 584  *   - V4L2_CID_EXPOSURE
 585  *
 586  * Return: 0 if successful, error code otherwise.
 587  */
 588 static int imx412_set_ctrl(struct v4l2_ctrl *ctrl)
 589 {
 590         struct imx412 *imx412 =
 591                 container_of(ctrl->handler, struct imx412, ctrl_handler);
 592         u32 analog_gain;
 593         u32 exposure;
 594         int ret;
 595
 596         switch (ctrl->id) {
 597         case V4L2_CID_VBLANK:
 598                 imx412->vblank = imx412->vblank_ctrl->val;
 599
 600                 dev_dbg(imx412->dev, "Received vblank %u, new lpfr %u",
 601                         imx412->vblank,
 602                         imx412->vblank + imx412->cur_mode->height);
 603
 604                 ret = __v4l2_ctrl_modify_range(imx412->exp_ctrl,
 605                                                IMX412_EXPOSURE_MIN,
 606                                                imx412->vblank +
 607                                                imx412->cur_mode->height -
 608                                                IMX412_EXPOSURE_OFFSET,
 609                                                1, IMX412_EXPOSURE_DEFAULT);
 610                 break;
 611         case V4L2_CID_EXPOSURE:
 612                 /* Set controls only if sensor is in power on state */
 613                 if (!pm_runtime_get_if_in_use(imx412->dev))
 614                         return 0;
 615
 616                 exposure = ctrl->val;
 617                 analog_gain = imx412->again_ctrl->val;
 618
 619                 dev_dbg(imx412->dev, "Received exp %u, analog gain %u",
 620                         exposure, analog_gain);
 621
 622                 ret = imx412_update_exp_gain(imx412, exposure, analog_gain);
 623
 624                 pm_runtime_put(imx412->dev);
 625
 626                 break;
 627         default:
 628                 dev_err(imx412->dev, "Invalid control %d", ctrl->id);
 629                 ret = -EINVAL;
 630         }
 631
 632         return ret;
 633 }
 634
 635 /* V4l2 subdevice control ops*/
 636 static const struct v4l2_ctrl_ops imx412_ctrl_ops = {
 637         .s_ctrl = imx412_set_ctrl,
 638 };
 639
 640 /**
 641  * imx412_enum_mbus_code() - Enumerate V4L2 sub-device mbus codes
 642  * @sd: pointer to imx412 V4L2 sub-device structure
 643  * @sd_state: V4L2 sub-device configuration
 644  * @code: V4L2 sub-device code enumeration need to be filled
 645  *
 646  * Return: 0 if successful, error code otherwise.
 647  */
 648 static int imx412_enum_mbus_code(struct v4l2_subdev *sd,
 649                                  struct v4l2_subdev_state *sd_state,
 650                                  struct v4l2_subdev_mbus_code_enum *code)
 651 {
 652         if (code->index > 0)
 653                 return -EINVAL;
 654
 655         code->code = supported_mode.code;
 656
 657         return 0;
 658 }
 659
 660 /**
 661  * imx412_enum_frame_size() - Enumerate V4L2 sub-device frame sizes
 662  * @sd: pointer to imx412 V4L2 sub-device structure
 663  * @sd_state: V4L2 sub-device configuration
 664  * @fsize: V4L2 sub-device size enumeration need to be filled
 665  *
 666  * Return: 0 if successful, error code otherwise.
 667  */
 668 static int imx412_enum_frame_size(struct v4l2_subdev *sd,
 669                                   struct v4l2_subdev_state *sd_state,
 670                                   struct v4l2_subdev_frame_size_enum *fsize)
 671 {
 672         if (fsize->index > 0)
 673                 return -EINVAL;
 674
 675         if (fsize->code != supported_mode.code)
 676                 return -EINVAL;
 677
 678         fsize->min_width = supported_mode.width;
 679         fsize->max_width = fsize->min_width;
 680         fsize->min_height = supported_mode.height;
 681         fsize->max_height = fsize->min_height;
 682
 683         return 0;
 684 }
 685
 686 /**
 687  * imx412_fill_pad_format() - Fill subdevice pad format
 688  *                            from selected sensor mode
 689  * @imx412: pointer to imx412 device
 690  * @mode: pointer to imx412_mode sensor mode
 691  * @fmt: V4L2 sub-device format need to be filled
 692  */
 693 static void imx412_fill_pad_format(struct imx412 *imx412,
 694                                    const struct imx412_mode *mode,
 695                                    struct v4l2_subdev_format *fmt)
 696 {
 697         fmt->format.width = mode->width;
 698         fmt->format.height = mode->height;
 699         fmt->format.code = mode->code;
 700         fmt->format.field = V4L2_FIELD_NONE;
 701         fmt->format.colorspace = V4L2_COLORSPACE_RAW;
 702         fmt->format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
 703         fmt->format.quantization = V4L2_QUANTIZATION_DEFAULT;
 704         fmt->format.xfer_func = V4L2_XFER_FUNC_NONE;
 705 }
 706
 707 /**
 708  * imx412_get_pad_format() - Get subdevice pad format
 709  * @sd: pointer to imx412 V4L2 sub-device structure
 710  * @sd_state: V4L2 sub-device configuration
 711  * @fmt: V4L2 sub-device format need to be set
 712  *
 713  * Return: 0 if successful, error code otherwise.
 714  */
 715 static int imx412_get_pad_format(struct v4l2_subdev *sd,
 716                                  struct v4l2_subdev_state *sd_state,
 717                                  struct v4l2_subdev_format *fmt)
 718 {
 719         struct imx412 *imx412 = to_imx412(sd);
 720
 721         mutex_lock(&imx412->mutex);
 722
 723         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 724                 struct v4l2_mbus_framefmt *framefmt;
 725
 726                 framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
 727                 fmt->format = *framefmt;
 728         } else {
 729                 imx412_fill_pad_format(imx412, imx412->cur_mode, fmt);
 730         }
 731
 732         mutex_unlock(&imx412->mutex);
 733
 734         return 0;
 735 }
 736
 737 /**
 738  * imx412_set_pad_format() - Set subdevice pad format
 739  * @sd: pointer to imx412 V4L2 sub-device structure
 740  * @sd_state: V4L2 sub-device configuration
 741  * @fmt: V4L2 sub-device format need to be set
 742  *
 743  * Return: 0 if successful, error code otherwise.
 744  */
 745 static int imx412_set_pad_format(struct v4l2_subdev *sd,
 746                                  struct v4l2_subdev_state *sd_state,
 747                                  struct v4l2_subdev_format *fmt)
 748 {
 749         struct imx412 *imx412 = to_imx412(sd);
 750         const struct imx412_mode *mode;
 751         int ret = 0;
 752
 753         mutex_lock(&imx412->mutex);
 754
 755         mode = &supported_mode;
 756         imx412_fill_pad_format(imx412, mode, fmt);
 757
 758         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 759                 struct v4l2_mbus_framefmt *framefmt;
 760
 761                 framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
 762                 *framefmt = fmt->format;
 763         } else {
 764                 ret = imx412_update_controls(imx412, mode);
 765                 if (!ret)
 766                         imx412->cur_mode = mode;
 767         }
 768
 769         mutex_unlock(&imx412->mutex);
 770
 771         return ret;
 772 }
 773
 774 /**
 775  * imx412_init_pad_cfg() - Initialize sub-device pad configuration
 776  * @sd: pointer to imx412 V4L2 sub-device structure
 777  * @sd_state: V4L2 sub-device configuration
 778  *
 779  * Return: 0 if successful, error code otherwise.
 780  */
 781 static int imx412_init_pad_cfg(struct v4l2_subdev *sd,
 782                                struct v4l2_subdev_state *sd_state)
 783 {
 784         struct imx412 *imx412 = to_imx412(sd);
 785         struct v4l2_subdev_format fmt = { 0 };
 786
 787         fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
 788         imx412_fill_pad_format(imx412, &supported_mode, &fmt);
 789
 790         return imx412_set_pad_format(sd, sd_state, &fmt);
 791 }
 792
 793 /**
 794  * imx412_start_streaming() - Start sensor stream
 795  * @imx412: pointer to imx412 device
 796  *
 797  * Return: 0 if successful, error code otherwise.
 798  */
 799 static int imx412_start_streaming(struct imx412 *imx412)
 800 {
 801         const struct imx412_reg_list *reg_list;
 802         int ret;
 803
 804         /* Write sensor mode registers */
 805         reg_list = &imx412->cur_mode->reg_list;
 806         ret = imx412_write_regs(imx412, reg_list->regs,
 807                                 reg_list->num_of_regs);
 808         if (ret) {
 809                 dev_err(imx412->dev, "fail to write initial registers");
 810                 return ret;
 811         }
 812
 813         /* Setup handler will write actual exposure and gain */
 814         ret =  __v4l2_ctrl_handler_setup(imx412->sd.ctrl_handler);
 815         if (ret) {
 816                 dev_err(imx412->dev, "fail to setup handler");
 817                 return ret;
 818         }
 819
 820         /* Delay is required before streaming*/
 821         usleep_range(7400, 8000);
 822
 823         /* Start streaming */
 824         ret = imx412_write_reg(imx412, IMX412_REG_MODE_SELECT,
 825                                1, IMX412_MODE_STREAMING);
 826         if (ret) {
 827                 dev_err(imx412->dev, "fail to start streaming");
 828                 return ret;
 829         }
 830
 831         return 0;
 832 }
 833
 834 /**
 835  * imx412_stop_streaming() - Stop sensor stream
 836  * @imx412: pointer to imx412 device
 837  *
 838  * Return: 0 if successful, error code otherwise.
 839  */
 840 static int imx412_stop_streaming(struct imx412 *imx412)
 841 {
 842         return imx412_write_reg(imx412, IMX412_REG_MODE_SELECT,
 843                                 1, IMX412_MODE_STANDBY);
 844 }
 845
 846 /**
 847  * imx412_set_stream() - Enable sensor streaming
 848  * @sd: pointer to imx412 subdevice
 849  * @enable: set to enable sensor streaming
 850  *
 851  * Return: 0 if successful, error code otherwise.
 852  */
 853 static int imx412_set_stream(struct v4l2_subdev *sd, int enable)
 854 {
 855         struct imx412 *imx412 = to_imx412(sd);
 856         int ret;
 857
 858         mutex_lock(&imx412->mutex);
 859
 860         if (imx412->streaming == enable) {
 861                 mutex_unlock(&imx412->mutex);
 862                 return 0;
 863         }
 864
 865         if (enable) {
 866                 ret = pm_runtime_resume_and_get(imx412->dev);
 867                 if (ret)
 868                         goto error_unlock;
 869
 870                 ret = imx412_start_streaming(imx412);
 871                 if (ret)
 872                         goto error_power_off;
 873         } else {
 874                 imx412_stop_streaming(imx412);
 875                 pm_runtime_put(imx412->dev);
 876         }
 877
 878         imx412->streaming = enable;
 879
 880         mutex_unlock(&imx412->mutex);
 881
 882         return 0;
 883
 884 error_power_off:
 885         pm_runtime_put(imx412->dev);
 886 error_unlock:
 887         mutex_unlock(&imx412->mutex);
 888
 889         return ret;
 890 }
 891
 892 /**
 893  * imx412_detect() - Detect imx412 sensor
 894  * @imx412: pointer to imx412 device
 895  *
 896  * Return: 0 if successful, -EIO if sensor id does not match
 897  */
 898 static int imx412_detect(struct imx412 *imx412)
 899 {
 900         int ret;
 901         u32 val;
 902
 903         ret = imx412_read_reg(imx412, IMX412_REG_ID, 2, &val);
 904         if (ret)
 905                 return ret;
 906
 907         if (val != IMX412_ID) {
 908                 dev_err(imx412->dev, "chip id mismatch: %x!=%x",
 909                         IMX412_ID, val);
 910                 return -ENXIO;
 911         }
 912
 913         return 0;
 914 }
 915
 916 /**
 917  * imx412_parse_hw_config() - Parse HW configuration and check if supported
 918  * @imx412: pointer to imx412 device
 919  *
 920  * Return: 0 if successful, error code otherwise.
 921  */
 922 static int imx412_parse_hw_config(struct imx412 *imx412)
 923 {
 924         struct fwnode_handle *fwnode = dev_fwnode(imx412->dev);
 925         struct v4l2_fwnode_endpoint bus_cfg = {
 926                 .bus_type = V4L2_MBUS_CSI2_DPHY
 927         };
 928         struct fwnode_handle *ep;
 929         unsigned long rate;
 930         unsigned int i;
 931         int ret;
 932
 933         if (!fwnode)
 934                 return -ENXIO;
 935
 936         /* Request optional reset pin */
 937         imx412->reset_gpio = devm_gpiod_get_optional(imx412->dev, "reset",
 938                                                      GPIOD_OUT_LOW);
 939         if (IS_ERR(imx412->reset_gpio)) {
 940                 dev_err(imx412->dev, "failed to get reset gpio %ld",
 941                         PTR_ERR(imx412->reset_gpio));
 942                 return PTR_ERR(imx412->reset_gpio);
 943         }
 944
 945         /* Get sensor input clock */
 946         imx412->inclk = devm_clk_get(imx412->dev, NULL);
 947         if (IS_ERR(imx412->inclk)) {
 948                 dev_err(imx412->dev, "could not get inclk");
 949                 return PTR_ERR(imx412->inclk);
 950         }
 951
 952         rate = clk_get_rate(imx412->inclk);
 953         if (rate != IMX412_INCLK_RATE) {
 954                 dev_err(imx412->dev, "inclk frequency mismatch");
 955                 return -EINVAL;
 956         }
 957
 958         /* Get optional DT defined regulators */
 959         for (i = 0; i < ARRAY_SIZE(imx412_supply_names); i++)
 960                 imx412->supplies[i].supply = imx412_supply_names[i];
 961
 962         ret = devm_regulator_bulk_get(imx412->dev,
 963                                       ARRAY_SIZE(imx412_supply_names),
 964                                       imx412->supplies);
 965         if (ret)
 966                 return ret;
 967
 968         ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
 969         if (!ep)
 970                 return -ENXIO;
 971
 972         ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
 973         fwnode_handle_put(ep);
 974         if (ret)
 975                 return ret;
 976
 977         if (bus_cfg.bus.mipi_csi2.num_data_lanes != IMX412_NUM_DATA_LANES) {
 978                 dev_err(imx412->dev,
 979                         "number of CSI2 data lanes %d is not supported",
 980                         bus_cfg.bus.mipi_csi2.num_data_lanes);
 981                 ret = -EINVAL;
 982                 goto done_endpoint_free;
 983         }
 984
 985         if (!bus_cfg.nr_of_link_frequencies) {
 986                 dev_err(imx412->dev, "no link frequencies defined");
 987                 ret = -EINVAL;
 988                 goto done_endpoint_free;
 989         }
 990
 991         for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
 992                 if (bus_cfg.link_frequencies[i] == IMX412_LINK_FREQ)
 993                         goto done_endpoint_free;
 994
 995         ret = -EINVAL;
 996
 997 done_endpoint_free:
 998         v4l2_fwnode_endpoint_free(&bus_cfg);
 999
1000         return ret;
1001 }
1002
1003 /* V4l2 subdevice ops */
1004 static const struct v4l2_subdev_video_ops imx412_video_ops = {
1005         .s_stream = imx412_set_stream,
1006 };
1007
1008 static const struct v4l2_subdev_pad_ops imx412_pad_ops = {
1009         .init_cfg = imx412_init_pad_cfg,
1010         .enum_mbus_code = imx412_enum_mbus_code,
1011         .enum_frame_size = imx412_enum_frame_size,
1012         .get_fmt = imx412_get_pad_format,
1013         .set_fmt = imx412_set_pad_format,
1014 };
1015
1016 static const struct v4l2_subdev_ops imx412_subdev_ops = {
1017         .video = &imx412_video_ops,
1018         .pad = &imx412_pad_ops,
1019 };
1020
1021 /**
1022  * imx412_power_on() - Sensor power on sequence
1023  * @dev: pointer to i2c device
1024  *
1025  * Return: 0 if successful, error code otherwise.
1026  */
1027 static int imx412_power_on(struct device *dev)
1028 {
1029         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1030         struct imx412 *imx412 = to_imx412(sd);
1031         int ret;
1032
1033         ret = regulator_bulk_enable(ARRAY_SIZE(imx412_supply_names),
1034                                     imx412->supplies);
1035         if (ret < 0) {
1036                 dev_err(dev, "failed to enable regulators\n");
1037                 return ret;
1038         }
1039
1040         gpiod_set_value_cansleep(imx412->reset_gpio, 0);
1041
1042         ret = clk_prepare_enable(imx412->inclk);
1043         if (ret) {
1044                 dev_err(imx412->dev, "fail to enable inclk");
1045                 goto error_reset;
1046         }
1047
1048         usleep_range(1000, 1200);
1049
1050         return 0;
1051
1052 error_reset:
1053         gpiod_set_value_cansleep(imx412->reset_gpio, 1);
1054         regulator_bulk_disable(ARRAY_SIZE(imx412_supply_names),
1055                                imx412->supplies);
1056
1057         return ret;
1058 }
1059
1060 /**
1061  * imx412_power_off() - Sensor power off sequence
1062  * @dev: pointer to i2c device
1063  *
1064  * Return: 0 if successful, error code otherwise.
1065  */
1066 static int imx412_power_off(struct device *dev)
1067 {
1068         struct v4l2_subdev *sd = dev_get_drvdata(dev);
1069         struct imx412 *imx412 = to_imx412(sd);
1070
1071         clk_disable_unprepare(imx412->inclk);
1072
1073         gpiod_set_value_cansleep(imx412->reset_gpio, 1);
1074
1075         regulator_bulk_disable(ARRAY_SIZE(imx412_supply_names),
1076                                imx412->supplies);
1077
1078         return 0;
1079 }
1080
1081 /**
1082  * imx412_init_controls() - Initialize sensor subdevice controls
1083  * @imx412: pointer to imx412 device
1084  *
1085  * Return: 0 if successful, error code otherwise.
1086  */
1087 static int imx412_init_controls(struct imx412 *imx412)
1088 {
1089         struct v4l2_ctrl_handler *ctrl_hdlr = &imx412->ctrl_handler;
1090         const struct imx412_mode *mode = imx412->cur_mode;
1091         u32 lpfr;
1092         int ret;
1093
1094         ret = v4l2_ctrl_handler_init(ctrl_hdlr, 6);
1095         if (ret)
1096                 return ret;
1097
1098         /* Serialize controls with sensor device */
1099         ctrl_hdlr->lock = &imx412->mutex;
1100
1101         /* Initialize exposure and gain */
1102         lpfr = mode->vblank + mode->height;
1103         imx412->exp_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1104                                              &imx412_ctrl_ops,
1105                                              V4L2_CID_EXPOSURE,
1106                                              IMX412_EXPOSURE_MIN,
1107                                              lpfr - IMX412_EXPOSURE_OFFSET,
1108                                              IMX412_EXPOSURE_STEP,
1109                                              IMX412_EXPOSURE_DEFAULT);
1110
1111         imx412->again_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1112                                                &imx412_ctrl_ops,
1113                                                V4L2_CID_ANALOGUE_GAIN,
1114                                                IMX412_AGAIN_MIN,
1115                                                IMX412_AGAIN_MAX,
1116                                                IMX412_AGAIN_STEP,
1117                                                IMX412_AGAIN_DEFAULT);
1118
1119         v4l2_ctrl_cluster(2, &imx412->exp_ctrl);
1120
1121         imx412->vblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1122                                                 &imx412_ctrl_ops,
1123                                                 V4L2_CID_VBLANK,
1124                                                 mode->vblank_min,
1125                                                 mode->vblank_max,
1126                                                 1, mode->vblank);
1127
1128         /* Read only controls */
1129         imx412->pclk_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1130                                               &imx412_ctrl_ops,
1131                                               V4L2_CID_PIXEL_RATE,
1132                                               mode->pclk, mode->pclk,
1133                                               1, mode->pclk);
1134
1135         imx412->link_freq_ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr,
1136                                                         &imx412_ctrl_ops,
1137                                                         V4L2_CID_LINK_FREQ,
1138                                                         ARRAY_SIZE(link_freq) -
1139                                                         1,
1140                                                         mode->link_freq_idx,
1141                                                         link_freq);
1142         if (imx412->link_freq_ctrl)
1143                 imx412->link_freq_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1144
1145         imx412->hblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1146                                                 &imx412_ctrl_ops,
1147                                                 V4L2_CID_HBLANK,
1148                                                 IMX412_REG_MIN,
1149                                                 IMX412_REG_MAX,
1150                                                 1, mode->hblank);
1151         if (imx412->hblank_ctrl)
1152                 imx412->hblank_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1153
1154         if (ctrl_hdlr->error) {
1155                 dev_err(imx412->dev, "control init failed: %d",
1156                         ctrl_hdlr->error);
1157                 v4l2_ctrl_handler_free(ctrl_hdlr);
1158                 return ctrl_hdlr->error;
1159         }
1160
1161         imx412->sd.ctrl_handler = ctrl_hdlr;
1162
1163         return 0;
1164 }
1165
1166 /**
1167  * imx412_probe() - I2C client device binding
1168  * @client: pointer to i2c client device
1169  *
1170  * Return: 0 if successful, error code otherwise.
1171  */
1172 static int imx412_probe(struct i2c_client *client)
1173 {
1174         struct imx412 *imx412;
1175         const char *name;
1176         int ret;
1177
1178         imx412 = devm_kzalloc(&client->dev, sizeof(*imx412), GFP_KERNEL);
1179         if (!imx412)
1180                 return -ENOMEM;
1181
1182         imx412->dev = &client->dev;
1183         name = device_get_match_data(&client->dev);
1184         if (!name)
1185                 return -ENODEV;
1186
1187         /* Initialize subdev */
1188         v4l2_i2c_subdev_init(&imx412->sd, client, &imx412_subdev_ops);
1189
1190         ret = imx412_parse_hw_config(imx412);
1191         if (ret) {
1192                 dev_err(imx412->dev, "HW configuration is not supported");
1193                 return ret;
1194         }
1195
1196         mutex_init(&imx412->mutex);
1197
1198         ret = imx412_power_on(imx412->dev);
1199         if (ret) {
1200                 dev_err(imx412->dev, "failed to power-on the sensor");
1201                 goto error_mutex_destroy;
1202         }
1203
1204         /* Check module identity */
1205         ret = imx412_detect(imx412);
1206         if (ret) {
1207                 dev_err(imx412->dev, "failed to find sensor: %d", ret);
1208                 goto error_power_off;
1209         }
1210
1211         /* Set default mode to max resolution */
1212         imx412->cur_mode = &supported_mode;
1213         imx412->vblank = imx412->cur_mode->vblank;
1214
1215         ret = imx412_init_controls(imx412);
1216         if (ret) {
1217                 dev_err(imx412->dev, "failed to init controls: %d", ret);
1218                 goto error_power_off;
1219         }
1220
1221         /* Initialize subdev */
1222         imx412->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1223         imx412->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1224
1225         v4l2_i2c_subdev_set_name(&imx412->sd, client, name, NULL);
1226
1227         /* Initialize source pad */
1228         imx412->pad.flags = MEDIA_PAD_FL_SOURCE;
1229         ret = media_entity_pads_init(&imx412->sd.entity, 1, &imx412->pad);
1230         if (ret) {
1231                 dev_err(imx412->dev, "failed to init entity pads: %d", ret);
1232                 goto error_handler_free;
1233         }
1234
1235         ret = v4l2_async_register_subdev_sensor(&imx412->sd);
1236         if (ret < 0) {
1237                 dev_err(imx412->dev,
1238                         "failed to register async subdev: %d", ret);
1239                 goto error_media_entity;
1240         }
1241
1242         pm_runtime_set_active(imx412->dev);
1243         pm_runtime_enable(imx412->dev);
1244         pm_runtime_idle(imx412->dev);
1245
1246         return 0;
1247
1248 error_media_entity:
1249         media_entity_cleanup(&imx412->sd.entity);
1250 error_handler_free:
1251         v4l2_ctrl_handler_free(imx412->sd.ctrl_handler);
1252 error_power_off:
1253         imx412_power_off(imx412->dev);
1254 error_mutex_destroy:
1255         mutex_destroy(&imx412->mutex);
1256
1257         return ret;
1258 }
1259
1260 /**
1261  * imx412_remove() - I2C client device unbinding
1262  * @client: pointer to I2C client device
1263  *
1264  * Return: 0 if successful, error code otherwise.
1265  */
1266 static void imx412_remove(struct i2c_client *client)
1267 {
1268         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1269         struct imx412 *imx412 = to_imx412(sd);
1270
1271         v4l2_async_unregister_subdev(sd);
1272         media_entity_cleanup(&sd->entity);
1273         v4l2_ctrl_handler_free(sd->ctrl_handler);
1274
1275         pm_runtime_disable(&client->dev);
1276         if (!pm_runtime_status_suspended(&client->dev))
1277                 imx412_power_off(&client->dev);
1278         pm_runtime_set_suspended(&client->dev);
1279
1280         mutex_destroy(&imx412->mutex);
1281 }
1282
1283 static const struct dev_pm_ops imx412_pm_ops = {
1284         SET_RUNTIME_PM_OPS(imx412_power_off, imx412_power_on, NULL)
1285 };
1286
1287 static const struct of_device_id imx412_of_match[] = {
1288         { .compatible = "sony,imx412", .data = "imx412" },
1289         { .compatible = "sony,imx577", .data = "imx577" },
1290         { }
1291 };
1292
1293 MODULE_DEVICE_TABLE(of, imx412_of_match);
1294
1295 static struct i2c_driver imx412_driver = {
1296         .probe = imx412_probe,
1297         .remove = imx412_remove,
1298         .driver = {
1299                 .name = "imx412",
1300                 .pm = &imx412_pm_ops,
1301                 .of_match_table = imx412_of_match,
1302         },
1303 };
1304
1305 module_i2c_driver(imx412_driver);
1306
1307 MODULE_DESCRIPTION("Sony imx412 sensor driver");
1308 MODULE_LICENSE("GPL");