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 <linux/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 */ 131 struct imx412 { 132 struct device *dev; 133 struct i2c_client *client; 134 struct v4l2_subdev sd; 135 struct media_pad pad; 136 struct gpio_desc *reset_gpio; 137 struct clk *inclk; 138 struct regulator_bulk_data supplies[ARRAY_SIZE(imx412_supply_names)]; 139 struct v4l2_ctrl_handler ctrl_handler; 140 struct v4l2_ctrl *link_freq_ctrl; 141 struct v4l2_ctrl *pclk_ctrl; 142 struct v4l2_ctrl *hblank_ctrl; 143 struct v4l2_ctrl *vblank_ctrl; 144 struct { 145 struct v4l2_ctrl *exp_ctrl; 146 struct v4l2_ctrl *again_ctrl; 147 }; 148 u32 vblank; 149 const struct imx412_mode *cur_mode; 150 struct mutex mutex; 151 }; 152 153 static const s64 link_freq[] = { 154 IMX412_LINK_FREQ, 155 }; 156 157 /* Sensor mode registers */ 158 static const struct imx412_reg mode_4056x3040_regs[] = { 159 {0x0136, 0x18}, 160 {0x0137, 0x00}, 161 {0x3c7e, 0x08}, 162 {0x3c7f, 0x02}, 163 {0x38a8, 0x1f}, 164 {0x38a9, 0xff}, 165 {0x38aa, 0x1f}, 166 {0x38ab, 0xff}, 167 {0x55d4, 0x00}, 168 {0x55d5, 0x00}, 169 {0x55d6, 0x07}, 170 {0x55d7, 0xff}, 171 {0x55e8, 0x07}, 172 {0x55e9, 0xff}, 173 {0x55ea, 0x00}, 174 {0x55eb, 0x00}, 175 {0x575c, 0x07}, 176 {0x575d, 0xff}, 177 {0x575e, 0x00}, 178 {0x575f, 0x00}, 179 {0x5764, 0x00}, 180 {0x5765, 0x00}, 181 {0x5766, 0x07}, 182 {0x5767, 0xff}, 183 {0x5974, 0x04}, 184 {0x5975, 0x01}, 185 {0x5f10, 0x09}, 186 {0x5f11, 0x92}, 187 {0x5f12, 0x32}, 188 {0x5f13, 0x72}, 189 {0x5f14, 0x16}, 190 {0x5f15, 0xba}, 191 {0x5f17, 0x13}, 192 {0x5f18, 0x24}, 193 {0x5f19, 0x60}, 194 {0x5f1a, 0xe3}, 195 {0x5f1b, 0xad}, 196 {0x5f1c, 0x74}, 197 {0x5f2d, 0x25}, 198 {0x5f5c, 0xd0}, 199 {0x6a22, 0x00}, 200 {0x6a23, 0x1d}, 201 {0x7ba8, 0x00}, 202 {0x7ba9, 0x00}, 203 {0x886b, 0x00}, 204 {0x9002, 0x0a}, 205 {0x9004, 0x1a}, 206 {0x9214, 0x93}, 207 {0x9215, 0x69}, 208 {0x9216, 0x93}, 209 {0x9217, 0x6b}, 210 {0x9218, 0x93}, 211 {0x9219, 0x6d}, 212 {0x921a, 0x57}, 213 {0x921b, 0x58}, 214 {0x921c, 0x57}, 215 {0x921d, 0x59}, 216 {0x921e, 0x57}, 217 {0x921f, 0x5a}, 218 {0x9220, 0x57}, 219 {0x9221, 0x5b}, 220 {0x9222, 0x93}, 221 {0x9223, 0x02}, 222 {0x9224, 0x93}, 223 {0x9225, 0x03}, 224 {0x9226, 0x93}, 225 {0x9227, 0x04}, 226 {0x9228, 0x93}, 227 {0x9229, 0x05}, 228 {0x922a, 0x98}, 229 {0x922b, 0x21}, 230 {0x922c, 0xb2}, 231 {0x922d, 0xdb}, 232 {0x922e, 0xb2}, 233 {0x922f, 0xdc}, 234 {0x9230, 0xb2}, 235 {0x9231, 0xdd}, 236 {0x9232, 0xe2}, 237 {0x9233, 0xe1}, 238 {0x9234, 0xb2}, 239 {0x9235, 0xe2}, 240 {0x9236, 0xb2}, 241 {0x9237, 0xe3}, 242 {0x9238, 0xb7}, 243 {0x9239, 0xb9}, 244 {0x923a, 0xb7}, 245 {0x923b, 0xbb}, 246 {0x923c, 0xb7}, 247 {0x923d, 0xbc}, 248 {0x923e, 0xb7}, 249 {0x923f, 0xc5}, 250 {0x9240, 0xb7}, 251 {0x9241, 0xc7}, 252 {0x9242, 0xb7}, 253 {0x9243, 0xc9}, 254 {0x9244, 0x98}, 255 {0x9245, 0x56}, 256 {0x9246, 0x98}, 257 {0x9247, 0x55}, 258 {0x9380, 0x00}, 259 {0x9381, 0x62}, 260 {0x9382, 0x00}, 261 {0x9383, 0x56}, 262 {0x9384, 0x00}, 263 {0x9385, 0x52}, 264 {0x9388, 0x00}, 265 {0x9389, 0x55}, 266 {0x938a, 0x00}, 267 {0x938b, 0x55}, 268 {0x938c, 0x00}, 269 {0x938d, 0x41}, 270 {0x5078, 0x01}, 271 {0x0112, 0x0a}, 272 {0x0113, 0x0a}, 273 {0x0114, 0x03}, 274 {0x0342, 0x11}, 275 {0x0343, 0xa0}, 276 {0x0340, 0x0d}, 277 {0x0341, 0xda}, 278 {0x3210, 0x00}, 279 {0x0344, 0x00}, 280 {0x0345, 0x00}, 281 {0x0346, 0x00}, 282 {0x0347, 0x00}, 283 {0x0348, 0x0f}, 284 {0x0349, 0xd7}, 285 {0x034a, 0x0b}, 286 {0x034b, 0xdf}, 287 {0x00e3, 0x00}, 288 {0x00e4, 0x00}, 289 {0x00e5, 0x01}, 290 {0x00fc, 0x0a}, 291 {0x00fd, 0x0a}, 292 {0x00fe, 0x0a}, 293 {0x00ff, 0x0a}, 294 {0xe013, 0x00}, 295 {0x0220, 0x00}, 296 {0x0221, 0x11}, 297 {0x0381, 0x01}, 298 {0x0383, 0x01}, 299 {0x0385, 0x01}, 300 {0x0387, 0x01}, 301 {0x0900, 0x00}, 302 {0x0901, 0x11}, 303 {0x0902, 0x00}, 304 {0x3140, 0x02}, 305 {0x3241, 0x11}, 306 {0x3250, 0x03}, 307 {0x3e10, 0x00}, 308 {0x3e11, 0x00}, 309 {0x3f0d, 0x00}, 310 {0x3f42, 0x00}, 311 {0x3f43, 0x00}, 312 {0x0401, 0x00}, 313 {0x0404, 0x00}, 314 {0x0405, 0x10}, 315 {0x0408, 0x00}, 316 {0x0409, 0x00}, 317 {0x040a, 0x00}, 318 {0x040b, 0x00}, 319 {0x040c, 0x0f}, 320 {0x040d, 0xd8}, 321 {0x040e, 0x0b}, 322 {0x040f, 0xe0}, 323 {0x034c, 0x0f}, 324 {0x034d, 0xd8}, 325 {0x034e, 0x0b}, 326 {0x034f, 0xe0}, 327 {0x0301, 0x05}, 328 {0x0303, 0x02}, 329 {0x0305, 0x04}, 330 {0x0306, 0x00}, 331 {0x0307, 0xc8}, 332 {0x0309, 0x0a}, 333 {0x030b, 0x01}, 334 {0x030d, 0x02}, 335 {0x030e, 0x01}, 336 {0x030f, 0x5e}, 337 {0x0310, 0x00}, 338 {0x0820, 0x12}, 339 {0x0821, 0xc0}, 340 {0x0822, 0x00}, 341 {0x0823, 0x00}, 342 {0x3e20, 0x01}, 343 {0x3e37, 0x00}, 344 {0x3f50, 0x00}, 345 {0x3f56, 0x00}, 346 {0x3f57, 0xe2}, 347 {0x3c0a, 0x5a}, 348 {0x3c0b, 0x55}, 349 {0x3c0c, 0x28}, 350 {0x3c0d, 0x07}, 351 {0x3c0e, 0xff}, 352 {0x3c0f, 0x00}, 353 {0x3c10, 0x00}, 354 {0x3c11, 0x02}, 355 {0x3c12, 0x00}, 356 {0x3c13, 0x03}, 357 {0x3c14, 0x00}, 358 {0x3c15, 0x00}, 359 {0x3c16, 0x0c}, 360 {0x3c17, 0x0c}, 361 {0x3c18, 0x0c}, 362 {0x3c19, 0x0a}, 363 {0x3c1a, 0x0a}, 364 {0x3c1b, 0x0a}, 365 {0x3c1c, 0x00}, 366 {0x3c1d, 0x00}, 367 {0x3c1e, 0x00}, 368 {0x3c1f, 0x00}, 369 {0x3c20, 0x00}, 370 {0x3c21, 0x00}, 371 {0x3c22, 0x3f}, 372 {0x3c23, 0x0a}, 373 {0x3e35, 0x01}, 374 {0x3f4a, 0x03}, 375 {0x3f4b, 0xbf}, 376 {0x3f26, 0x00}, 377 {0x0202, 0x0d}, 378 {0x0203, 0xc4}, 379 {0x0204, 0x00}, 380 {0x0205, 0x00}, 381 {0x020e, 0x01}, 382 {0x020f, 0x00}, 383 {0x0210, 0x01}, 384 {0x0211, 0x00}, 385 {0x0212, 0x01}, 386 {0x0213, 0x00}, 387 {0x0214, 0x01}, 388 {0x0215, 0x00}, 389 {0xbcf1, 0x00}, 390 }; 391 392 /* Supported sensor mode configurations */ 393 static const struct imx412_mode supported_mode = { 394 .width = 4056, 395 .height = 3040, 396 .hblank = 456, 397 .vblank = 506, 398 .vblank_min = 506, 399 .vblank_max = 32420, 400 .pclk = 480000000, 401 .link_freq_idx = 0, 402 .code = MEDIA_BUS_FMT_SRGGB10_1X10, 403 .reg_list = { 404 .num_of_regs = ARRAY_SIZE(mode_4056x3040_regs), 405 .regs = mode_4056x3040_regs, 406 }, 407 }; 408 409 /** 410 * to_imx412() - imx412 V4L2 sub-device to imx412 device. 411 * @subdev: pointer to imx412 V4L2 sub-device 412 * 413 * Return: pointer to imx412 device 414 */ 415 static inline struct imx412 *to_imx412(struct v4l2_subdev *subdev) 416 { 417 return container_of(subdev, struct imx412, sd); 418 } 419 420 /** 421 * imx412_read_reg() - Read registers. 422 * @imx412: pointer to imx412 device 423 * @reg: register address 424 * @len: length of bytes to read. Max supported bytes is 4 425 * @val: pointer to register value to be filled. 426 * 427 * Return: 0 if successful, error code otherwise. 428 */ 429 static int imx412_read_reg(struct imx412 *imx412, u16 reg, u32 len, u32 *val) 430 { 431 struct i2c_client *client = v4l2_get_subdevdata(&imx412->sd); 432 struct i2c_msg msgs[2] = {0}; 433 u8 addr_buf[2] = {0}; 434 u8 data_buf[4] = {0}; 435 int ret; 436 437 if (WARN_ON(len > 4)) 438 return -EINVAL; 439 440 put_unaligned_be16(reg, addr_buf); 441 442 /* Write register address */ 443 msgs[0].addr = client->addr; 444 msgs[0].flags = 0; 445 msgs[0].len = ARRAY_SIZE(addr_buf); 446 msgs[0].buf = addr_buf; 447 448 /* Read data from register */ 449 msgs[1].addr = client->addr; 450 msgs[1].flags = I2C_M_RD; 451 msgs[1].len = len; 452 msgs[1].buf = &data_buf[4 - len]; 453 454 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); 455 if (ret != ARRAY_SIZE(msgs)) 456 return -EIO; 457 458 *val = get_unaligned_be32(data_buf); 459 460 return 0; 461 } 462 463 /** 464 * imx412_write_reg() - Write register 465 * @imx412: pointer to imx412 device 466 * @reg: register address 467 * @len: length of bytes. Max supported bytes is 4 468 * @val: register value 469 * 470 * Return: 0 if successful, error code otherwise. 471 */ 472 static int imx412_write_reg(struct imx412 *imx412, u16 reg, u32 len, u32 val) 473 { 474 struct i2c_client *client = v4l2_get_subdevdata(&imx412->sd); 475 u8 buf[6] = {0}; 476 477 if (WARN_ON(len > 4)) 478 return -EINVAL; 479 480 put_unaligned_be16(reg, buf); 481 put_unaligned_be32(val << (8 * (4 - len)), buf + 2); 482 if (i2c_master_send(client, buf, len + 2) != len + 2) 483 return -EIO; 484 485 return 0; 486 } 487 488 /** 489 * imx412_write_regs() - Write a list of registers 490 * @imx412: pointer to imx412 device 491 * @regs: list of registers to be written 492 * @len: length of registers array 493 * 494 * Return: 0 if successful, error code otherwise. 495 */ 496 static int imx412_write_regs(struct imx412 *imx412, 497 const struct imx412_reg *regs, u32 len) 498 { 499 unsigned int i; 500 int ret; 501 502 for (i = 0; i < len; i++) { 503 ret = imx412_write_reg(imx412, regs[i].address, 1, regs[i].val); 504 if (ret) 505 return ret; 506 } 507 508 return 0; 509 } 510 511 /** 512 * imx412_update_controls() - Update control ranges based on streaming mode 513 * @imx412: pointer to imx412 device 514 * @mode: pointer to imx412_mode sensor mode 515 * 516 * Return: 0 if successful, error code otherwise. 517 */ 518 static int imx412_update_controls(struct imx412 *imx412, 519 const struct imx412_mode *mode) 520 { 521 int ret; 522 523 ret = __v4l2_ctrl_s_ctrl(imx412->link_freq_ctrl, mode->link_freq_idx); 524 if (ret) 525 return ret; 526 527 ret = __v4l2_ctrl_s_ctrl(imx412->hblank_ctrl, mode->hblank); 528 if (ret) 529 return ret; 530 531 return __v4l2_ctrl_modify_range(imx412->vblank_ctrl, mode->vblank_min, 532 mode->vblank_max, 1, mode->vblank); 533 } 534 535 /** 536 * imx412_update_exp_gain() - Set updated exposure and gain 537 * @imx412: pointer to imx412 device 538 * @exposure: updated exposure value 539 * @gain: updated analog gain value 540 * 541 * Return: 0 if successful, error code otherwise. 542 */ 543 static int imx412_update_exp_gain(struct imx412 *imx412, u32 exposure, u32 gain) 544 { 545 u32 lpfr; 546 int ret; 547 548 lpfr = imx412->vblank + imx412->cur_mode->height; 549 550 dev_dbg(imx412->dev, "Set exp %u, analog gain %u, lpfr %u\n", 551 exposure, gain, lpfr); 552 553 ret = imx412_write_reg(imx412, IMX412_REG_HOLD, 1, 1); 554 if (ret) 555 return ret; 556 557 ret = imx412_write_reg(imx412, IMX412_REG_LPFR, 2, lpfr); 558 if (ret) 559 goto error_release_group_hold; 560 561 ret = imx412_write_reg(imx412, IMX412_REG_EXPOSURE_CIT, 2, exposure); 562 if (ret) 563 goto error_release_group_hold; 564 565 ret = imx412_write_reg(imx412, IMX412_REG_AGAIN, 2, gain); 566 567 error_release_group_hold: 568 imx412_write_reg(imx412, IMX412_REG_HOLD, 1, 0); 569 570 return ret; 571 } 572 573 static int imx412_set_ctrl(struct v4l2_ctrl *ctrl) 574 { 575 struct imx412 *imx412 = 576 container_of(ctrl->handler, struct imx412, ctrl_handler); 577 u32 analog_gain; 578 u32 exposure; 579 int ret; 580 581 switch (ctrl->id) { 582 case V4L2_CID_VBLANK: 583 imx412->vblank = imx412->vblank_ctrl->val; 584 585 dev_dbg(imx412->dev, "Received vblank %u, new lpfr %u\n", 586 imx412->vblank, 587 imx412->vblank + imx412->cur_mode->height); 588 589 ret = __v4l2_ctrl_modify_range(imx412->exp_ctrl, 590 IMX412_EXPOSURE_MIN, 591 imx412->vblank + 592 imx412->cur_mode->height - 593 IMX412_EXPOSURE_OFFSET, 594 1, IMX412_EXPOSURE_DEFAULT); 595 break; 596 case V4L2_CID_EXPOSURE: 597 /* Set controls only if sensor is in power on state */ 598 if (!pm_runtime_get_if_in_use(imx412->dev)) 599 return 0; 600 601 exposure = ctrl->val; 602 analog_gain = imx412->again_ctrl->val; 603 604 dev_dbg(imx412->dev, "Received exp %u, analog gain %u\n", 605 exposure, analog_gain); 606 607 ret = imx412_update_exp_gain(imx412, exposure, analog_gain); 608 609 pm_runtime_put(imx412->dev); 610 611 break; 612 default: 613 dev_err(imx412->dev, "Invalid control %d\n", ctrl->id); 614 ret = -EINVAL; 615 } 616 617 return ret; 618 } 619 620 /* V4l2 subdevice control ops*/ 621 static const struct v4l2_ctrl_ops imx412_ctrl_ops = { 622 .s_ctrl = imx412_set_ctrl, 623 }; 624 625 static int imx412_enum_mbus_code(struct v4l2_subdev *sd, 626 struct v4l2_subdev_state *sd_state, 627 struct v4l2_subdev_mbus_code_enum *code) 628 { 629 if (code->index > 0) 630 return -EINVAL; 631 632 code->code = supported_mode.code; 633 634 return 0; 635 } 636 637 static int imx412_enum_frame_size(struct v4l2_subdev *sd, 638 struct v4l2_subdev_state *sd_state, 639 struct v4l2_subdev_frame_size_enum *fsize) 640 { 641 if (fsize->index > 0) 642 return -EINVAL; 643 644 if (fsize->code != supported_mode.code) 645 return -EINVAL; 646 647 fsize->min_width = supported_mode.width; 648 fsize->max_width = fsize->min_width; 649 fsize->min_height = supported_mode.height; 650 fsize->max_height = fsize->min_height; 651 652 return 0; 653 } 654 655 /** 656 * imx412_fill_pad_format() - Fill subdevice pad format 657 * from selected sensor mode 658 * @imx412: pointer to imx412 device 659 * @mode: pointer to imx412_mode sensor mode 660 * @fmt: V4L2 sub-device format need to be filled 661 */ 662 static void imx412_fill_pad_format(struct imx412 *imx412, 663 const struct imx412_mode *mode, 664 struct v4l2_subdev_format *fmt) 665 { 666 fmt->format.width = mode->width; 667 fmt->format.height = mode->height; 668 fmt->format.code = mode->code; 669 fmt->format.field = V4L2_FIELD_NONE; 670 fmt->format.colorspace = V4L2_COLORSPACE_RAW; 671 fmt->format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; 672 fmt->format.quantization = V4L2_QUANTIZATION_DEFAULT; 673 fmt->format.xfer_func = V4L2_XFER_FUNC_NONE; 674 } 675 676 static int imx412_get_pad_format(struct v4l2_subdev *sd, 677 struct v4l2_subdev_state *sd_state, 678 struct v4l2_subdev_format *fmt) 679 { 680 struct imx412 *imx412 = to_imx412(sd); 681 682 mutex_lock(&imx412->mutex); 683 684 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 685 struct v4l2_mbus_framefmt *framefmt; 686 687 framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad); 688 fmt->format = *framefmt; 689 } else { 690 imx412_fill_pad_format(imx412, imx412->cur_mode, fmt); 691 } 692 693 mutex_unlock(&imx412->mutex); 694 695 return 0; 696 } 697 698 static int imx412_set_pad_format(struct v4l2_subdev *sd, 699 struct v4l2_subdev_state *sd_state, 700 struct v4l2_subdev_format *fmt) 701 { 702 struct imx412 *imx412 = to_imx412(sd); 703 const struct imx412_mode *mode; 704 int ret = 0; 705 706 mutex_lock(&imx412->mutex); 707 708 mode = &supported_mode; 709 imx412_fill_pad_format(imx412, mode, fmt); 710 711 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 712 struct v4l2_mbus_framefmt *framefmt; 713 714 framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad); 715 *framefmt = fmt->format; 716 } else { 717 ret = imx412_update_controls(imx412, mode); 718 if (!ret) 719 imx412->cur_mode = mode; 720 } 721 722 mutex_unlock(&imx412->mutex); 723 724 return ret; 725 } 726 727 static int imx412_init_state(struct v4l2_subdev *sd, 728 struct v4l2_subdev_state *sd_state) 729 { 730 struct imx412 *imx412 = to_imx412(sd); 731 struct v4l2_subdev_format fmt = { 0 }; 732 733 fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; 734 imx412_fill_pad_format(imx412, &supported_mode, &fmt); 735 736 return imx412_set_pad_format(sd, sd_state, &fmt); 737 } 738 739 /** 740 * imx412_start_streaming() - Start sensor stream 741 * @imx412: pointer to imx412 device 742 * 743 * Return: 0 if successful, error code otherwise. 744 */ 745 static int imx412_start_streaming(struct imx412 *imx412) 746 { 747 const struct imx412_reg_list *reg_list; 748 int ret; 749 750 /* Write sensor mode registers */ 751 reg_list = &imx412->cur_mode->reg_list; 752 ret = imx412_write_regs(imx412, reg_list->regs, 753 reg_list->num_of_regs); 754 if (ret) { 755 dev_err(imx412->dev, "fail to write initial registers\n"); 756 return ret; 757 } 758 759 /* Setup handler will write actual exposure and gain */ 760 ret = __v4l2_ctrl_handler_setup(imx412->sd.ctrl_handler); 761 if (ret) { 762 dev_err(imx412->dev, "fail to setup handler\n"); 763 return ret; 764 } 765 766 /* Delay is required before streaming*/ 767 usleep_range(7400, 8000); 768 769 /* Start streaming */ 770 ret = imx412_write_reg(imx412, IMX412_REG_MODE_SELECT, 771 1, IMX412_MODE_STREAMING); 772 if (ret) { 773 dev_err(imx412->dev, "fail to start streaming\n"); 774 return ret; 775 } 776 777 return 0; 778 } 779 780 /** 781 * imx412_stop_streaming() - Stop sensor stream 782 * @imx412: pointer to imx412 device 783 * 784 * Return: 0 if successful, error code otherwise. 785 */ 786 static int imx412_stop_streaming(struct imx412 *imx412) 787 { 788 return imx412_write_reg(imx412, IMX412_REG_MODE_SELECT, 789 1, IMX412_MODE_STANDBY); 790 } 791 792 static int imx412_set_stream(struct v4l2_subdev *sd, int enable) 793 { 794 struct imx412 *imx412 = to_imx412(sd); 795 int ret; 796 797 mutex_lock(&imx412->mutex); 798 799 if (enable) { 800 ret = pm_runtime_resume_and_get(imx412->dev); 801 if (ret) 802 goto error_unlock; 803 804 ret = imx412_start_streaming(imx412); 805 if (ret) 806 goto error_power_off; 807 } else { 808 imx412_stop_streaming(imx412); 809 pm_runtime_put(imx412->dev); 810 } 811 812 mutex_unlock(&imx412->mutex); 813 814 return 0; 815 816 error_power_off: 817 pm_runtime_put(imx412->dev); 818 error_unlock: 819 mutex_unlock(&imx412->mutex); 820 821 return ret; 822 } 823 824 /** 825 * imx412_detect() - Detect imx412 sensor 826 * @imx412: pointer to imx412 device 827 * 828 * Return: 0 if successful, -EIO if sensor id does not match 829 */ 830 static int imx412_detect(struct imx412 *imx412) 831 { 832 int ret; 833 u32 val; 834 835 ret = imx412_read_reg(imx412, IMX412_REG_ID, 2, &val); 836 if (ret) 837 return ret; 838 839 if (val != IMX412_ID) { 840 dev_err(imx412->dev, "chip id mismatch: %x!=%x\n", 841 IMX412_ID, val); 842 return -ENXIO; 843 } 844 845 return 0; 846 } 847 848 /** 849 * imx412_parse_hw_config() - Parse HW configuration and check if supported 850 * @imx412: pointer to imx412 device 851 * 852 * Return: 0 if successful, error code otherwise. 853 */ 854 static int imx412_parse_hw_config(struct imx412 *imx412) 855 { 856 struct fwnode_handle *fwnode = dev_fwnode(imx412->dev); 857 struct v4l2_fwnode_endpoint bus_cfg = { 858 .bus_type = V4L2_MBUS_CSI2_DPHY 859 }; 860 struct fwnode_handle *ep; 861 unsigned long rate; 862 unsigned int i; 863 int ret; 864 865 if (!fwnode) 866 return -ENXIO; 867 868 /* Request optional reset pin */ 869 imx412->reset_gpio = devm_gpiod_get_optional(imx412->dev, "reset", 870 GPIOD_OUT_HIGH); 871 if (IS_ERR(imx412->reset_gpio)) { 872 dev_err(imx412->dev, "failed to get reset gpio %pe\n", 873 imx412->reset_gpio); 874 return PTR_ERR(imx412->reset_gpio); 875 } 876 877 /* Get sensor input clock */ 878 imx412->inclk = devm_v4l2_sensor_clk_get(imx412->dev, NULL); 879 if (IS_ERR(imx412->inclk)) 880 return dev_err_probe(imx412->dev, PTR_ERR(imx412->inclk), 881 "could not get inclk\n"); 882 883 rate = clk_get_rate(imx412->inclk); 884 if (rate != IMX412_INCLK_RATE) { 885 dev_err(imx412->dev, "inclk frequency mismatch\n"); 886 return -EINVAL; 887 } 888 889 /* Get optional DT defined regulators */ 890 for (i = 0; i < ARRAY_SIZE(imx412_supply_names); i++) 891 imx412->supplies[i].supply = imx412_supply_names[i]; 892 893 ret = devm_regulator_bulk_get(imx412->dev, 894 ARRAY_SIZE(imx412_supply_names), 895 imx412->supplies); 896 if (ret) 897 return ret; 898 899 ep = fwnode_graph_get_next_endpoint(fwnode, NULL); 900 if (!ep) 901 return -ENXIO; 902 903 ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); 904 fwnode_handle_put(ep); 905 if (ret) 906 return ret; 907 908 if (bus_cfg.bus.mipi_csi2.num_data_lanes != IMX412_NUM_DATA_LANES) { 909 dev_err(imx412->dev, 910 "number of CSI2 data lanes %d is not supported\n", 911 bus_cfg.bus.mipi_csi2.num_data_lanes); 912 ret = -EINVAL; 913 goto done_endpoint_free; 914 } 915 916 if (!bus_cfg.nr_of_link_frequencies) { 917 dev_err(imx412->dev, "no link frequencies defined\n"); 918 ret = -EINVAL; 919 goto done_endpoint_free; 920 } 921 922 for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) 923 if (bus_cfg.link_frequencies[i] == IMX412_LINK_FREQ) 924 goto done_endpoint_free; 925 926 ret = -EINVAL; 927 928 done_endpoint_free: 929 v4l2_fwnode_endpoint_free(&bus_cfg); 930 931 return ret; 932 } 933 934 /* V4l2 subdevice ops */ 935 static const struct v4l2_subdev_video_ops imx412_video_ops = { 936 .s_stream = imx412_set_stream, 937 }; 938 939 static const struct v4l2_subdev_pad_ops imx412_pad_ops = { 940 .enum_mbus_code = imx412_enum_mbus_code, 941 .enum_frame_size = imx412_enum_frame_size, 942 .get_fmt = imx412_get_pad_format, 943 .set_fmt = imx412_set_pad_format, 944 }; 945 946 static const struct v4l2_subdev_ops imx412_subdev_ops = { 947 .video = &imx412_video_ops, 948 .pad = &imx412_pad_ops, 949 }; 950 951 static const struct v4l2_subdev_internal_ops imx412_internal_ops = { 952 .init_state = imx412_init_state, 953 }; 954 955 static int imx412_power_on(struct device *dev) 956 { 957 struct v4l2_subdev *sd = dev_get_drvdata(dev); 958 struct imx412 *imx412 = to_imx412(sd); 959 int ret; 960 961 ret = regulator_bulk_enable(ARRAY_SIZE(imx412_supply_names), 962 imx412->supplies); 963 if (ret < 0) { 964 dev_err(dev, "failed to enable regulators\n"); 965 return ret; 966 } 967 968 gpiod_set_value_cansleep(imx412->reset_gpio, 0); 969 970 ret = clk_prepare_enable(imx412->inclk); 971 if (ret) { 972 dev_err(imx412->dev, "fail to enable inclk\n"); 973 goto error_reset; 974 } 975 976 /* 977 * Certain Arducam IMX577 module variants require a longer reset settle 978 * time. Increasing the delay from 1ms to 10ms ensures reliable startup. 979 */ 980 usleep_range(10000, 12000); 981 982 return 0; 983 984 error_reset: 985 gpiod_set_value_cansleep(imx412->reset_gpio, 1); 986 regulator_bulk_disable(ARRAY_SIZE(imx412_supply_names), 987 imx412->supplies); 988 989 return ret; 990 } 991 992 static int imx412_power_off(struct device *dev) 993 { 994 struct v4l2_subdev *sd = dev_get_drvdata(dev); 995 struct imx412 *imx412 = to_imx412(sd); 996 997 clk_disable_unprepare(imx412->inclk); 998 999 gpiod_set_value_cansleep(imx412->reset_gpio, 1); 1000 1001 regulator_bulk_disable(ARRAY_SIZE(imx412_supply_names), 1002 imx412->supplies); 1003 1004 return 0; 1005 } 1006 1007 /** 1008 * imx412_init_controls() - Initialize sensor subdevice controls 1009 * @imx412: pointer to imx412 device 1010 * 1011 * Return: 0 if successful, error code otherwise. 1012 */ 1013 static int imx412_init_controls(struct imx412 *imx412) 1014 { 1015 struct v4l2_ctrl_handler *ctrl_hdlr = &imx412->ctrl_handler; 1016 const struct imx412_mode *mode = imx412->cur_mode; 1017 u32 lpfr; 1018 int ret; 1019 1020 ret = v4l2_ctrl_handler_init(ctrl_hdlr, 6); 1021 if (ret) 1022 return ret; 1023 1024 /* Serialize controls with sensor device */ 1025 ctrl_hdlr->lock = &imx412->mutex; 1026 1027 /* Initialize exposure and gain */ 1028 lpfr = mode->vblank + mode->height; 1029 imx412->exp_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, 1030 &imx412_ctrl_ops, 1031 V4L2_CID_EXPOSURE, 1032 IMX412_EXPOSURE_MIN, 1033 lpfr - IMX412_EXPOSURE_OFFSET, 1034 IMX412_EXPOSURE_STEP, 1035 IMX412_EXPOSURE_DEFAULT); 1036 1037 imx412->again_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, 1038 &imx412_ctrl_ops, 1039 V4L2_CID_ANALOGUE_GAIN, 1040 IMX412_AGAIN_MIN, 1041 IMX412_AGAIN_MAX, 1042 IMX412_AGAIN_STEP, 1043 IMX412_AGAIN_DEFAULT); 1044 1045 v4l2_ctrl_cluster(2, &imx412->exp_ctrl); 1046 1047 imx412->vblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, 1048 &imx412_ctrl_ops, 1049 V4L2_CID_VBLANK, 1050 mode->vblank_min, 1051 mode->vblank_max, 1052 1, mode->vblank); 1053 1054 /* Read only controls */ 1055 imx412->pclk_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, 1056 &imx412_ctrl_ops, 1057 V4L2_CID_PIXEL_RATE, 1058 mode->pclk, mode->pclk, 1059 1, mode->pclk); 1060 1061 imx412->link_freq_ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr, 1062 &imx412_ctrl_ops, 1063 V4L2_CID_LINK_FREQ, 1064 ARRAY_SIZE(link_freq) - 1065 1, 1066 mode->link_freq_idx, 1067 link_freq); 1068 if (imx412->link_freq_ctrl) 1069 imx412->link_freq_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; 1070 1071 imx412->hblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, 1072 &imx412_ctrl_ops, 1073 V4L2_CID_HBLANK, 1074 IMX412_REG_MIN, 1075 IMX412_REG_MAX, 1076 1, mode->hblank); 1077 if (imx412->hblank_ctrl) 1078 imx412->hblank_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; 1079 1080 if (ctrl_hdlr->error) { 1081 dev_err(imx412->dev, "control init failed: %d\n", 1082 ctrl_hdlr->error); 1083 v4l2_ctrl_handler_free(ctrl_hdlr); 1084 return ctrl_hdlr->error; 1085 } 1086 1087 imx412->sd.ctrl_handler = ctrl_hdlr; 1088 1089 return 0; 1090 } 1091 1092 static int imx412_probe(struct i2c_client *client) 1093 { 1094 struct imx412 *imx412; 1095 const char *name; 1096 int ret; 1097 1098 imx412 = devm_kzalloc(&client->dev, sizeof(*imx412), GFP_KERNEL); 1099 if (!imx412) 1100 return -ENOMEM; 1101 1102 imx412->dev = &client->dev; 1103 name = device_get_match_data(&client->dev); 1104 if (!name) 1105 return -ENODEV; 1106 1107 /* Initialize subdev */ 1108 v4l2_i2c_subdev_init(&imx412->sd, client, &imx412_subdev_ops); 1109 imx412->sd.internal_ops = &imx412_internal_ops; 1110 1111 ret = imx412_parse_hw_config(imx412); 1112 if (ret) { 1113 dev_err(imx412->dev, "HW configuration is not supported\n"); 1114 return ret; 1115 } 1116 1117 mutex_init(&imx412->mutex); 1118 1119 ret = imx412_power_on(imx412->dev); 1120 if (ret) { 1121 dev_err(imx412->dev, "failed to power-on the sensor\n"); 1122 goto error_mutex_destroy; 1123 } 1124 1125 /* Check module identity */ 1126 ret = imx412_detect(imx412); 1127 if (ret) { 1128 dev_err(imx412->dev, "failed to find sensor: %d\n", ret); 1129 goto error_power_off; 1130 } 1131 1132 /* Set default mode to max resolution */ 1133 imx412->cur_mode = &supported_mode; 1134 imx412->vblank = imx412->cur_mode->vblank; 1135 1136 ret = imx412_init_controls(imx412); 1137 if (ret) { 1138 dev_err(imx412->dev, "failed to init controls: %d\n", ret); 1139 goto error_power_off; 1140 } 1141 1142 /* Initialize subdev */ 1143 imx412->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 1144 imx412->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 1145 1146 v4l2_i2c_subdev_set_name(&imx412->sd, client, name, NULL); 1147 1148 /* Initialize source pad */ 1149 imx412->pad.flags = MEDIA_PAD_FL_SOURCE; 1150 ret = media_entity_pads_init(&imx412->sd.entity, 1, &imx412->pad); 1151 if (ret) { 1152 dev_err(imx412->dev, "failed to init entity pads: %d\n", ret); 1153 goto error_handler_free; 1154 } 1155 1156 ret = v4l2_async_register_subdev_sensor(&imx412->sd); 1157 if (ret < 0) { 1158 dev_err(imx412->dev, 1159 "failed to register async subdev: %d\n", ret); 1160 goto error_media_entity; 1161 } 1162 1163 pm_runtime_set_active(imx412->dev); 1164 pm_runtime_enable(imx412->dev); 1165 pm_runtime_idle(imx412->dev); 1166 1167 return 0; 1168 1169 error_media_entity: 1170 media_entity_cleanup(&imx412->sd.entity); 1171 error_handler_free: 1172 v4l2_ctrl_handler_free(imx412->sd.ctrl_handler); 1173 error_power_off: 1174 imx412_power_off(imx412->dev); 1175 error_mutex_destroy: 1176 mutex_destroy(&imx412->mutex); 1177 1178 return ret; 1179 } 1180 1181 static void imx412_remove(struct i2c_client *client) 1182 { 1183 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1184 struct imx412 *imx412 = to_imx412(sd); 1185 1186 v4l2_async_unregister_subdev(sd); 1187 media_entity_cleanup(&sd->entity); 1188 v4l2_ctrl_handler_free(sd->ctrl_handler); 1189 1190 pm_runtime_disable(&client->dev); 1191 if (!pm_runtime_status_suspended(&client->dev)) 1192 imx412_power_off(&client->dev); 1193 pm_runtime_set_suspended(&client->dev); 1194 1195 mutex_destroy(&imx412->mutex); 1196 } 1197 1198 static const struct dev_pm_ops imx412_pm_ops = { 1199 SET_RUNTIME_PM_OPS(imx412_power_off, imx412_power_on, NULL) 1200 }; 1201 1202 static const struct of_device_id imx412_of_match[] = { 1203 { .compatible = "sony,imx412", .data = "imx412" }, 1204 { .compatible = "sony,imx577", .data = "imx577" }, 1205 { } 1206 }; 1207 1208 MODULE_DEVICE_TABLE(of, imx412_of_match); 1209 1210 static struct i2c_driver imx412_driver = { 1211 .probe = imx412_probe, 1212 .remove = imx412_remove, 1213 .driver = { 1214 .name = "imx412", 1215 .pm = &imx412_pm_ops, 1216 .of_match_table = imx412_of_match, 1217 }, 1218 }; 1219 1220 module_i2c_driver(imx412_driver); 1221 1222 MODULE_DESCRIPTION("Sony imx412 sensor driver"); 1223 MODULE_LICENSE("GPL"); 1224