1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Sony imx335 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 15 #include <media/v4l2-ctrls.h> 16 #include <media/v4l2-fwnode.h> 17 #include <media/v4l2-subdev.h> 18 19 /* Streaming Mode */ 20 #define IMX335_REG_MODE_SELECT 0x3000 21 #define IMX335_MODE_STANDBY 0x01 22 #define IMX335_MODE_STREAMING 0x00 23 24 /* Lines per frame */ 25 #define IMX335_REG_LPFR 0x3030 26 27 /* Chip ID */ 28 #define IMX335_REG_ID 0x3912 29 #define IMX335_ID 0x00 30 31 /* Exposure control */ 32 #define IMX335_REG_SHUTTER 0x3058 33 #define IMX335_EXPOSURE_MIN 1 34 #define IMX335_EXPOSURE_OFFSET 9 35 #define IMX335_EXPOSURE_STEP 1 36 #define IMX335_EXPOSURE_DEFAULT 0x0648 37 38 /* Analog gain control */ 39 #define IMX335_REG_AGAIN 0x30e8 40 #define IMX335_AGAIN_MIN 0 41 #define IMX335_AGAIN_MAX 240 42 #define IMX335_AGAIN_STEP 1 43 #define IMX335_AGAIN_DEFAULT 0 44 45 /* Group hold register */ 46 #define IMX335_REG_HOLD 0x3001 47 48 /* Input clock rate */ 49 #define IMX335_INCLK_RATE 24000000 50 51 /* CSI2 HW configuration */ 52 #define IMX335_LINK_FREQ 594000000 53 #define IMX335_NUM_DATA_LANES 4 54 55 #define IMX335_REG_MIN 0x00 56 #define IMX335_REG_MAX 0xfffff 57 58 /** 59 * struct imx335_reg - imx335 sensor register 60 * @address: Register address 61 * @val: Register value 62 */ 63 struct imx335_reg { 64 u16 address; 65 u8 val; 66 }; 67 68 /** 69 * struct imx335_reg_list - imx335 sensor register list 70 * @num_of_regs: Number of registers in the list 71 * @regs: Pointer to register list 72 */ 73 struct imx335_reg_list { 74 u32 num_of_regs; 75 const struct imx335_reg *regs; 76 }; 77 78 /** 79 * struct imx335_mode - imx335 sensor mode structure 80 * @width: Frame width 81 * @height: Frame height 82 * @code: Format code 83 * @hblank: Horizontal blanking in lines 84 * @vblank: Vertical blanking in lines 85 * @vblank_min: Minimum vertical blanking in lines 86 * @vblank_max: Maximum vertical blanking in lines 87 * @pclk: Sensor pixel clock 88 * @link_freq_idx: Link frequency index 89 * @reg_list: Register list for sensor mode 90 */ 91 struct imx335_mode { 92 u32 width; 93 u32 height; 94 u32 code; 95 u32 hblank; 96 u32 vblank; 97 u32 vblank_min; 98 u32 vblank_max; 99 u64 pclk; 100 u32 link_freq_idx; 101 struct imx335_reg_list reg_list; 102 }; 103 104 /** 105 * struct imx335 - imx335 sensor device structure 106 * @dev: Pointer to generic device 107 * @client: Pointer to i2c client 108 * @sd: V4L2 sub-device 109 * @pad: Media pad. Only one pad supported 110 * @reset_gpio: Sensor reset gpio 111 * @inclk: Sensor input clock 112 * @ctrl_handler: V4L2 control handler 113 * @link_freq_ctrl: Pointer to link frequency control 114 * @pclk_ctrl: Pointer to pixel clock control 115 * @hblank_ctrl: Pointer to horizontal blanking control 116 * @vblank_ctrl: Pointer to vertical blanking control 117 * @exp_ctrl: Pointer to exposure control 118 * @again_ctrl: Pointer to analog gain control 119 * @vblank: Vertical blanking in lines 120 * @cur_mode: Pointer to current selected sensor mode 121 * @mutex: Mutex for serializing sensor controls 122 * @streaming: Flag indicating streaming state 123 */ 124 struct imx335 { 125 struct device *dev; 126 struct i2c_client *client; 127 struct v4l2_subdev sd; 128 struct media_pad pad; 129 struct gpio_desc *reset_gpio; 130 struct clk *inclk; 131 struct v4l2_ctrl_handler ctrl_handler; 132 struct v4l2_ctrl *link_freq_ctrl; 133 struct v4l2_ctrl *pclk_ctrl; 134 struct v4l2_ctrl *hblank_ctrl; 135 struct v4l2_ctrl *vblank_ctrl; 136 struct { 137 struct v4l2_ctrl *exp_ctrl; 138 struct v4l2_ctrl *again_ctrl; 139 }; 140 u32 vblank; 141 const struct imx335_mode *cur_mode; 142 struct mutex mutex; 143 bool streaming; 144 }; 145 146 static const s64 link_freq[] = { 147 IMX335_LINK_FREQ, 148 }; 149 150 /* Sensor mode registers */ 151 static const struct imx335_reg mode_2592x1940_regs[] = { 152 {0x3000, 0x01}, 153 {0x3002, 0x00}, 154 {0x300c, 0x3b}, 155 {0x300d, 0x2a}, 156 {0x3018, 0x04}, 157 {0x302c, 0x3c}, 158 {0x302e, 0x20}, 159 {0x3056, 0x94}, 160 {0x3074, 0xc8}, 161 {0x3076, 0x28}, 162 {0x304c, 0x00}, 163 {0x314c, 0xc6}, 164 {0x315a, 0x02}, 165 {0x3168, 0xa0}, 166 {0x316a, 0x7e}, 167 {0x31a1, 0x00}, 168 {0x3288, 0x21}, 169 {0x328a, 0x02}, 170 {0x3414, 0x05}, 171 {0x3416, 0x18}, 172 {0x3648, 0x01}, 173 {0x364a, 0x04}, 174 {0x364c, 0x04}, 175 {0x3678, 0x01}, 176 {0x367c, 0x31}, 177 {0x367e, 0x31}, 178 {0x3706, 0x10}, 179 {0x3708, 0x03}, 180 {0x3714, 0x02}, 181 {0x3715, 0x02}, 182 {0x3716, 0x01}, 183 {0x3717, 0x03}, 184 {0x371c, 0x3d}, 185 {0x371d, 0x3f}, 186 {0x372c, 0x00}, 187 {0x372d, 0x00}, 188 {0x372e, 0x46}, 189 {0x372f, 0x00}, 190 {0x3730, 0x89}, 191 {0x3731, 0x00}, 192 {0x3732, 0x08}, 193 {0x3733, 0x01}, 194 {0x3734, 0xfe}, 195 {0x3735, 0x05}, 196 {0x3740, 0x02}, 197 {0x375d, 0x00}, 198 {0x375e, 0x00}, 199 {0x375f, 0x11}, 200 {0x3760, 0x01}, 201 {0x3768, 0x1b}, 202 {0x3769, 0x1b}, 203 {0x376a, 0x1b}, 204 {0x376b, 0x1b}, 205 {0x376c, 0x1a}, 206 {0x376d, 0x17}, 207 {0x376e, 0x0f}, 208 {0x3776, 0x00}, 209 {0x3777, 0x00}, 210 {0x3778, 0x46}, 211 {0x3779, 0x00}, 212 {0x377a, 0x89}, 213 {0x377b, 0x00}, 214 {0x377c, 0x08}, 215 {0x377d, 0x01}, 216 {0x377e, 0x23}, 217 {0x377f, 0x02}, 218 {0x3780, 0xd9}, 219 {0x3781, 0x03}, 220 {0x3782, 0xf5}, 221 {0x3783, 0x06}, 222 {0x3784, 0xa5}, 223 {0x3788, 0x0f}, 224 {0x378a, 0xd9}, 225 {0x378b, 0x03}, 226 {0x378c, 0xeb}, 227 {0x378d, 0x05}, 228 {0x378e, 0x87}, 229 {0x378f, 0x06}, 230 {0x3790, 0xf5}, 231 {0x3792, 0x43}, 232 {0x3794, 0x7a}, 233 {0x3796, 0xa1}, 234 {0x37b0, 0x36}, 235 {0x3a00, 0x01}, 236 }; 237 238 /* Supported sensor mode configurations */ 239 static const struct imx335_mode supported_mode = { 240 .width = 2592, 241 .height = 1940, 242 .hblank = 342, 243 .vblank = 2560, 244 .vblank_min = 2560, 245 .vblank_max = 133060, 246 .pclk = 396000000, 247 .link_freq_idx = 0, 248 .code = MEDIA_BUS_FMT_SRGGB12_1X12, 249 .reg_list = { 250 .num_of_regs = ARRAY_SIZE(mode_2592x1940_regs), 251 .regs = mode_2592x1940_regs, 252 }, 253 }; 254 255 /** 256 * to_imx335() - imx335 V4L2 sub-device to imx335 device. 257 * @subdev: pointer to imx335 V4L2 sub-device 258 * 259 * Return: pointer to imx335 device 260 */ 261 static inline struct imx335 *to_imx335(struct v4l2_subdev *subdev) 262 { 263 return container_of(subdev, struct imx335, sd); 264 } 265 266 /** 267 * imx335_read_reg() - Read registers. 268 * @imx335: pointer to imx335 device 269 * @reg: register address 270 * @len: length of bytes to read. Max supported bytes is 4 271 * @val: pointer to register value to be filled. 272 * 273 * Big endian register addresses with little endian values. 274 * 275 * Return: 0 if successful, error code otherwise. 276 */ 277 static int imx335_read_reg(struct imx335 *imx335, u16 reg, u32 len, u32 *val) 278 { 279 struct i2c_client *client = v4l2_get_subdevdata(&imx335->sd); 280 struct i2c_msg msgs[2] = {0}; 281 u8 addr_buf[2] = {0}; 282 u8 data_buf[4] = {0}; 283 int ret; 284 285 if (WARN_ON(len > 4)) 286 return -EINVAL; 287 288 put_unaligned_be16(reg, addr_buf); 289 290 /* Write register address */ 291 msgs[0].addr = client->addr; 292 msgs[0].flags = 0; 293 msgs[0].len = ARRAY_SIZE(addr_buf); 294 msgs[0].buf = addr_buf; 295 296 /* Read data from register */ 297 msgs[1].addr = client->addr; 298 msgs[1].flags = I2C_M_RD; 299 msgs[1].len = len; 300 msgs[1].buf = data_buf; 301 302 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); 303 if (ret != ARRAY_SIZE(msgs)) 304 return -EIO; 305 306 *val = get_unaligned_le32(data_buf); 307 308 return 0; 309 } 310 311 /** 312 * imx335_write_reg() - Write register 313 * @imx335: pointer to imx335 device 314 * @reg: register address 315 * @len: length of bytes. Max supported bytes is 4 316 * @val: register value 317 * 318 * Big endian register addresses with little endian values. 319 * 320 * Return: 0 if successful, error code otherwise. 321 */ 322 static int imx335_write_reg(struct imx335 *imx335, u16 reg, u32 len, u32 val) 323 { 324 struct i2c_client *client = v4l2_get_subdevdata(&imx335->sd); 325 u8 buf[6] = {0}; 326 327 if (WARN_ON(len > 4)) 328 return -EINVAL; 329 330 put_unaligned_be16(reg, buf); 331 put_unaligned_le32(val, buf + 2); 332 if (i2c_master_send(client, buf, len + 2) != len + 2) 333 return -EIO; 334 335 return 0; 336 } 337 338 /** 339 * imx335_write_regs() - Write a list of registers 340 * @imx335: pointer to imx335 device 341 * @regs: list of registers to be written 342 * @len: length of registers array 343 * 344 * Return: 0 if successful. error code otherwise. 345 */ 346 static int imx335_write_regs(struct imx335 *imx335, 347 const struct imx335_reg *regs, u32 len) 348 { 349 unsigned int i; 350 int ret; 351 352 for (i = 0; i < len; i++) { 353 ret = imx335_write_reg(imx335, regs[i].address, 1, regs[i].val); 354 if (ret) 355 return ret; 356 } 357 358 return 0; 359 } 360 361 /** 362 * imx335_update_controls() - Update control ranges based on streaming mode 363 * @imx335: pointer to imx335 device 364 * @mode: pointer to imx335_mode sensor mode 365 * 366 * Return: 0 if successful, error code otherwise. 367 */ 368 static int imx335_update_controls(struct imx335 *imx335, 369 const struct imx335_mode *mode) 370 { 371 int ret; 372 373 ret = __v4l2_ctrl_s_ctrl(imx335->link_freq_ctrl, mode->link_freq_idx); 374 if (ret) 375 return ret; 376 377 ret = __v4l2_ctrl_s_ctrl(imx335->hblank_ctrl, mode->hblank); 378 if (ret) 379 return ret; 380 381 return __v4l2_ctrl_modify_range(imx335->vblank_ctrl, mode->vblank_min, 382 mode->vblank_max, 1, mode->vblank); 383 } 384 385 /** 386 * imx335_update_exp_gain() - Set updated exposure and gain 387 * @imx335: pointer to imx335 device 388 * @exposure: updated exposure value 389 * @gain: updated analog gain value 390 * 391 * Return: 0 if successful, error code otherwise. 392 */ 393 static int imx335_update_exp_gain(struct imx335 *imx335, u32 exposure, u32 gain) 394 { 395 u32 lpfr, shutter; 396 int ret; 397 398 lpfr = imx335->vblank + imx335->cur_mode->height; 399 shutter = lpfr - exposure; 400 401 dev_dbg(imx335->dev, "Set exp %u, analog gain %u, shutter %u, lpfr %u", 402 exposure, gain, shutter, lpfr); 403 404 ret = imx335_write_reg(imx335, IMX335_REG_HOLD, 1, 1); 405 if (ret) 406 return ret; 407 408 ret = imx335_write_reg(imx335, IMX335_REG_LPFR, 3, lpfr); 409 if (ret) 410 goto error_release_group_hold; 411 412 ret = imx335_write_reg(imx335, IMX335_REG_SHUTTER, 3, shutter); 413 if (ret) 414 goto error_release_group_hold; 415 416 ret = imx335_write_reg(imx335, IMX335_REG_AGAIN, 2, gain); 417 418 error_release_group_hold: 419 imx335_write_reg(imx335, IMX335_REG_HOLD, 1, 0); 420 421 return ret; 422 } 423 424 /** 425 * imx335_set_ctrl() - Set subdevice control 426 * @ctrl: pointer to v4l2_ctrl structure 427 * 428 * Supported controls: 429 * - V4L2_CID_VBLANK 430 * - cluster controls: 431 * - V4L2_CID_ANALOGUE_GAIN 432 * - V4L2_CID_EXPOSURE 433 * 434 * Return: 0 if successful, error code otherwise. 435 */ 436 static int imx335_set_ctrl(struct v4l2_ctrl *ctrl) 437 { 438 struct imx335 *imx335 = 439 container_of(ctrl->handler, struct imx335, ctrl_handler); 440 u32 analog_gain; 441 u32 exposure; 442 int ret; 443 444 switch (ctrl->id) { 445 case V4L2_CID_VBLANK: 446 imx335->vblank = imx335->vblank_ctrl->val; 447 448 dev_dbg(imx335->dev, "Received vblank %u, new lpfr %u", 449 imx335->vblank, 450 imx335->vblank + imx335->cur_mode->height); 451 452 ret = __v4l2_ctrl_modify_range(imx335->exp_ctrl, 453 IMX335_EXPOSURE_MIN, 454 imx335->vblank + 455 imx335->cur_mode->height - 456 IMX335_EXPOSURE_OFFSET, 457 1, IMX335_EXPOSURE_DEFAULT); 458 break; 459 case V4L2_CID_EXPOSURE: 460 /* Set controls only if sensor is in power on state */ 461 if (!pm_runtime_get_if_in_use(imx335->dev)) 462 return 0; 463 464 exposure = ctrl->val; 465 analog_gain = imx335->again_ctrl->val; 466 467 dev_dbg(imx335->dev, "Received exp %u, analog gain %u", 468 exposure, analog_gain); 469 470 ret = imx335_update_exp_gain(imx335, exposure, analog_gain); 471 472 pm_runtime_put(imx335->dev); 473 474 break; 475 default: 476 dev_err(imx335->dev, "Invalid control %d", ctrl->id); 477 ret = -EINVAL; 478 } 479 480 return ret; 481 } 482 483 /* V4l2 subdevice control ops*/ 484 static const struct v4l2_ctrl_ops imx335_ctrl_ops = { 485 .s_ctrl = imx335_set_ctrl, 486 }; 487 488 /** 489 * imx335_enum_mbus_code() - Enumerate V4L2 sub-device mbus codes 490 * @sd: pointer to imx335 V4L2 sub-device structure 491 * @sd_state: V4L2 sub-device configuration 492 * @code: V4L2 sub-device code enumeration need to be filled 493 * 494 * Return: 0 if successful, error code otherwise. 495 */ 496 static int imx335_enum_mbus_code(struct v4l2_subdev *sd, 497 struct v4l2_subdev_state *sd_state, 498 struct v4l2_subdev_mbus_code_enum *code) 499 { 500 if (code->index > 0) 501 return -EINVAL; 502 503 code->code = supported_mode.code; 504 505 return 0; 506 } 507 508 /** 509 * imx335_enum_frame_size() - Enumerate V4L2 sub-device frame sizes 510 * @sd: pointer to imx335 V4L2 sub-device structure 511 * @sd_state: V4L2 sub-device configuration 512 * @fsize: V4L2 sub-device size enumeration need to be filled 513 * 514 * Return: 0 if successful, error code otherwise. 515 */ 516 static int imx335_enum_frame_size(struct v4l2_subdev *sd, 517 struct v4l2_subdev_state *sd_state, 518 struct v4l2_subdev_frame_size_enum *fsize) 519 { 520 if (fsize->index > 0) 521 return -EINVAL; 522 523 if (fsize->code != supported_mode.code) 524 return -EINVAL; 525 526 fsize->min_width = supported_mode.width; 527 fsize->max_width = fsize->min_width; 528 fsize->min_height = supported_mode.height; 529 fsize->max_height = fsize->min_height; 530 531 return 0; 532 } 533 534 /** 535 * imx335_fill_pad_format() - Fill subdevice pad format 536 * from selected sensor mode 537 * @imx335: pointer to imx335 device 538 * @mode: pointer to imx335_mode sensor mode 539 * @fmt: V4L2 sub-device format need to be filled 540 */ 541 static void imx335_fill_pad_format(struct imx335 *imx335, 542 const struct imx335_mode *mode, 543 struct v4l2_subdev_format *fmt) 544 { 545 fmt->format.width = mode->width; 546 fmt->format.height = mode->height; 547 fmt->format.code = mode->code; 548 fmt->format.field = V4L2_FIELD_NONE; 549 fmt->format.colorspace = V4L2_COLORSPACE_RAW; 550 fmt->format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; 551 fmt->format.quantization = V4L2_QUANTIZATION_DEFAULT; 552 fmt->format.xfer_func = V4L2_XFER_FUNC_NONE; 553 } 554 555 /** 556 * imx335_get_pad_format() - Get subdevice pad format 557 * @sd: pointer to imx335 V4L2 sub-device structure 558 * @sd_state: V4L2 sub-device configuration 559 * @fmt: V4L2 sub-device format need to be set 560 * 561 * Return: 0 if successful, error code otherwise. 562 */ 563 static int imx335_get_pad_format(struct v4l2_subdev *sd, 564 struct v4l2_subdev_state *sd_state, 565 struct v4l2_subdev_format *fmt) 566 { 567 struct imx335 *imx335 = to_imx335(sd); 568 569 mutex_lock(&imx335->mutex); 570 571 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 572 struct v4l2_mbus_framefmt *framefmt; 573 574 framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad); 575 fmt->format = *framefmt; 576 } else { 577 imx335_fill_pad_format(imx335, imx335->cur_mode, fmt); 578 } 579 580 mutex_unlock(&imx335->mutex); 581 582 return 0; 583 } 584 585 /** 586 * imx335_set_pad_format() - Set subdevice pad format 587 * @sd: pointer to imx335 V4L2 sub-device structure 588 * @sd_state: V4L2 sub-device configuration 589 * @fmt: V4L2 sub-device format need to be set 590 * 591 * Return: 0 if successful, error code otherwise. 592 */ 593 static int imx335_set_pad_format(struct v4l2_subdev *sd, 594 struct v4l2_subdev_state *sd_state, 595 struct v4l2_subdev_format *fmt) 596 { 597 struct imx335 *imx335 = to_imx335(sd); 598 const struct imx335_mode *mode; 599 int ret = 0; 600 601 mutex_lock(&imx335->mutex); 602 603 mode = &supported_mode; 604 imx335_fill_pad_format(imx335, mode, fmt); 605 606 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 607 struct v4l2_mbus_framefmt *framefmt; 608 609 framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad); 610 *framefmt = fmt->format; 611 } else { 612 ret = imx335_update_controls(imx335, mode); 613 if (!ret) 614 imx335->cur_mode = mode; 615 } 616 617 mutex_unlock(&imx335->mutex); 618 619 return ret; 620 } 621 622 /** 623 * imx335_init_pad_cfg() - Initialize sub-device pad configuration 624 * @sd: pointer to imx335 V4L2 sub-device structure 625 * @sd_state: V4L2 sub-device configuration 626 * 627 * Return: 0 if successful, error code otherwise. 628 */ 629 static int imx335_init_pad_cfg(struct v4l2_subdev *sd, 630 struct v4l2_subdev_state *sd_state) 631 { 632 struct imx335 *imx335 = to_imx335(sd); 633 struct v4l2_subdev_format fmt = { 0 }; 634 635 fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; 636 imx335_fill_pad_format(imx335, &supported_mode, &fmt); 637 638 return imx335_set_pad_format(sd, sd_state, &fmt); 639 } 640 641 /** 642 * imx335_start_streaming() - Start sensor stream 643 * @imx335: pointer to imx335 device 644 * 645 * Return: 0 if successful, error code otherwise. 646 */ 647 static int imx335_start_streaming(struct imx335 *imx335) 648 { 649 const struct imx335_reg_list *reg_list; 650 int ret; 651 652 /* Write sensor mode registers */ 653 reg_list = &imx335->cur_mode->reg_list; 654 ret = imx335_write_regs(imx335, reg_list->regs, 655 reg_list->num_of_regs); 656 if (ret) { 657 dev_err(imx335->dev, "fail to write initial registers"); 658 return ret; 659 } 660 661 /* Setup handler will write actual exposure and gain */ 662 ret = __v4l2_ctrl_handler_setup(imx335->sd.ctrl_handler); 663 if (ret) { 664 dev_err(imx335->dev, "fail to setup handler"); 665 return ret; 666 } 667 668 /* Start streaming */ 669 ret = imx335_write_reg(imx335, IMX335_REG_MODE_SELECT, 670 1, IMX335_MODE_STREAMING); 671 if (ret) { 672 dev_err(imx335->dev, "fail to start streaming"); 673 return ret; 674 } 675 676 /* Initial regulator stabilization period */ 677 usleep_range(18000, 20000); 678 679 return 0; 680 } 681 682 /** 683 * imx335_stop_streaming() - Stop sensor stream 684 * @imx335: pointer to imx335 device 685 * 686 * Return: 0 if successful, error code otherwise. 687 */ 688 static int imx335_stop_streaming(struct imx335 *imx335) 689 { 690 return imx335_write_reg(imx335, IMX335_REG_MODE_SELECT, 691 1, IMX335_MODE_STANDBY); 692 } 693 694 /** 695 * imx335_set_stream() - Enable sensor streaming 696 * @sd: pointer to imx335 subdevice 697 * @enable: set to enable sensor streaming 698 * 699 * Return: 0 if successful, error code otherwise. 700 */ 701 static int imx335_set_stream(struct v4l2_subdev *sd, int enable) 702 { 703 struct imx335 *imx335 = to_imx335(sd); 704 int ret; 705 706 mutex_lock(&imx335->mutex); 707 708 if (imx335->streaming == enable) { 709 mutex_unlock(&imx335->mutex); 710 return 0; 711 } 712 713 if (enable) { 714 ret = pm_runtime_resume_and_get(imx335->dev); 715 if (ret) 716 goto error_unlock; 717 718 ret = imx335_start_streaming(imx335); 719 if (ret) 720 goto error_power_off; 721 } else { 722 imx335_stop_streaming(imx335); 723 pm_runtime_put(imx335->dev); 724 } 725 726 imx335->streaming = enable; 727 728 mutex_unlock(&imx335->mutex); 729 730 return 0; 731 732 error_power_off: 733 pm_runtime_put(imx335->dev); 734 error_unlock: 735 mutex_unlock(&imx335->mutex); 736 737 return ret; 738 } 739 740 /** 741 * imx335_detect() - Detect imx335 sensor 742 * @imx335: pointer to imx335 device 743 * 744 * Return: 0 if successful, -EIO if sensor id does not match 745 */ 746 static int imx335_detect(struct imx335 *imx335) 747 { 748 int ret; 749 u32 val; 750 751 ret = imx335_read_reg(imx335, IMX335_REG_ID, 2, &val); 752 if (ret) 753 return ret; 754 755 if (val != IMX335_ID) { 756 dev_err(imx335->dev, "chip id mismatch: %x!=%x", 757 IMX335_ID, val); 758 return -ENXIO; 759 } 760 761 return 0; 762 } 763 764 /** 765 * imx335_parse_hw_config() - Parse HW configuration and check if supported 766 * @imx335: pointer to imx335 device 767 * 768 * Return: 0 if successful, error code otherwise. 769 */ 770 static int imx335_parse_hw_config(struct imx335 *imx335) 771 { 772 struct fwnode_handle *fwnode = dev_fwnode(imx335->dev); 773 struct v4l2_fwnode_endpoint bus_cfg = { 774 .bus_type = V4L2_MBUS_CSI2_DPHY 775 }; 776 struct fwnode_handle *ep; 777 unsigned long rate; 778 unsigned int i; 779 int ret; 780 781 if (!fwnode) 782 return -ENXIO; 783 784 /* Request optional reset pin */ 785 imx335->reset_gpio = devm_gpiod_get_optional(imx335->dev, "reset", 786 GPIOD_OUT_LOW); 787 if (IS_ERR(imx335->reset_gpio)) { 788 dev_err(imx335->dev, "failed to get reset gpio %ld", 789 PTR_ERR(imx335->reset_gpio)); 790 return PTR_ERR(imx335->reset_gpio); 791 } 792 793 /* Get sensor input clock */ 794 imx335->inclk = devm_clk_get(imx335->dev, NULL); 795 if (IS_ERR(imx335->inclk)) { 796 dev_err(imx335->dev, "could not get inclk"); 797 return PTR_ERR(imx335->inclk); 798 } 799 800 rate = clk_get_rate(imx335->inclk); 801 if (rate != IMX335_INCLK_RATE) { 802 dev_err(imx335->dev, "inclk frequency mismatch"); 803 return -EINVAL; 804 } 805 806 ep = fwnode_graph_get_next_endpoint(fwnode, NULL); 807 if (!ep) 808 return -ENXIO; 809 810 ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); 811 fwnode_handle_put(ep); 812 if (ret) 813 return ret; 814 815 if (bus_cfg.bus.mipi_csi2.num_data_lanes != IMX335_NUM_DATA_LANES) { 816 dev_err(imx335->dev, 817 "number of CSI2 data lanes %d is not supported", 818 bus_cfg.bus.mipi_csi2.num_data_lanes); 819 ret = -EINVAL; 820 goto done_endpoint_free; 821 } 822 823 if (!bus_cfg.nr_of_link_frequencies) { 824 dev_err(imx335->dev, "no link frequencies defined"); 825 ret = -EINVAL; 826 goto done_endpoint_free; 827 } 828 829 for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) 830 if (bus_cfg.link_frequencies[i] == IMX335_LINK_FREQ) 831 goto done_endpoint_free; 832 833 ret = -EINVAL; 834 835 done_endpoint_free: 836 v4l2_fwnode_endpoint_free(&bus_cfg); 837 838 return ret; 839 } 840 841 /* V4l2 subdevice ops */ 842 static const struct v4l2_subdev_video_ops imx335_video_ops = { 843 .s_stream = imx335_set_stream, 844 }; 845 846 static const struct v4l2_subdev_pad_ops imx335_pad_ops = { 847 .init_cfg = imx335_init_pad_cfg, 848 .enum_mbus_code = imx335_enum_mbus_code, 849 .enum_frame_size = imx335_enum_frame_size, 850 .get_fmt = imx335_get_pad_format, 851 .set_fmt = imx335_set_pad_format, 852 }; 853 854 static const struct v4l2_subdev_ops imx335_subdev_ops = { 855 .video = &imx335_video_ops, 856 .pad = &imx335_pad_ops, 857 }; 858 859 /** 860 * imx335_power_on() - Sensor power on sequence 861 * @dev: pointer to i2c device 862 * 863 * Return: 0 if successful, error code otherwise. 864 */ 865 static int imx335_power_on(struct device *dev) 866 { 867 struct v4l2_subdev *sd = dev_get_drvdata(dev); 868 struct imx335 *imx335 = to_imx335(sd); 869 int ret; 870 871 gpiod_set_value_cansleep(imx335->reset_gpio, 1); 872 873 ret = clk_prepare_enable(imx335->inclk); 874 if (ret) { 875 dev_err(imx335->dev, "fail to enable inclk"); 876 goto error_reset; 877 } 878 879 usleep_range(20, 22); 880 881 return 0; 882 883 error_reset: 884 gpiod_set_value_cansleep(imx335->reset_gpio, 0); 885 886 return ret; 887 } 888 889 /** 890 * imx335_power_off() - Sensor power off sequence 891 * @dev: pointer to i2c device 892 * 893 * Return: 0 if successful, error code otherwise. 894 */ 895 static int imx335_power_off(struct device *dev) 896 { 897 struct v4l2_subdev *sd = dev_get_drvdata(dev); 898 struct imx335 *imx335 = to_imx335(sd); 899 900 gpiod_set_value_cansleep(imx335->reset_gpio, 0); 901 902 clk_disable_unprepare(imx335->inclk); 903 904 return 0; 905 } 906 907 /** 908 * imx335_init_controls() - Initialize sensor subdevice controls 909 * @imx335: pointer to imx335 device 910 * 911 * Return: 0 if successful, error code otherwise. 912 */ 913 static int imx335_init_controls(struct imx335 *imx335) 914 { 915 struct v4l2_ctrl_handler *ctrl_hdlr = &imx335->ctrl_handler; 916 const struct imx335_mode *mode = imx335->cur_mode; 917 u32 lpfr; 918 int ret; 919 920 ret = v4l2_ctrl_handler_init(ctrl_hdlr, 6); 921 if (ret) 922 return ret; 923 924 /* Serialize controls with sensor device */ 925 ctrl_hdlr->lock = &imx335->mutex; 926 927 /* Initialize exposure and gain */ 928 lpfr = mode->vblank + mode->height; 929 imx335->exp_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, 930 &imx335_ctrl_ops, 931 V4L2_CID_EXPOSURE, 932 IMX335_EXPOSURE_MIN, 933 lpfr - IMX335_EXPOSURE_OFFSET, 934 IMX335_EXPOSURE_STEP, 935 IMX335_EXPOSURE_DEFAULT); 936 937 imx335->again_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, 938 &imx335_ctrl_ops, 939 V4L2_CID_ANALOGUE_GAIN, 940 IMX335_AGAIN_MIN, 941 IMX335_AGAIN_MAX, 942 IMX335_AGAIN_STEP, 943 IMX335_AGAIN_DEFAULT); 944 945 v4l2_ctrl_cluster(2, &imx335->exp_ctrl); 946 947 imx335->vblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, 948 &imx335_ctrl_ops, 949 V4L2_CID_VBLANK, 950 mode->vblank_min, 951 mode->vblank_max, 952 1, mode->vblank); 953 954 /* Read only controls */ 955 imx335->pclk_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, 956 &imx335_ctrl_ops, 957 V4L2_CID_PIXEL_RATE, 958 mode->pclk, mode->pclk, 959 1, mode->pclk); 960 961 imx335->link_freq_ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr, 962 &imx335_ctrl_ops, 963 V4L2_CID_LINK_FREQ, 964 ARRAY_SIZE(link_freq) - 965 1, 966 mode->link_freq_idx, 967 link_freq); 968 if (imx335->link_freq_ctrl) 969 imx335->link_freq_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; 970 971 imx335->hblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, 972 &imx335_ctrl_ops, 973 V4L2_CID_HBLANK, 974 IMX335_REG_MIN, 975 IMX335_REG_MAX, 976 1, mode->hblank); 977 if (imx335->hblank_ctrl) 978 imx335->hblank_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; 979 980 if (ctrl_hdlr->error) { 981 dev_err(imx335->dev, "control init failed: %d", 982 ctrl_hdlr->error); 983 v4l2_ctrl_handler_free(ctrl_hdlr); 984 return ctrl_hdlr->error; 985 } 986 987 imx335->sd.ctrl_handler = ctrl_hdlr; 988 989 return 0; 990 } 991 992 /** 993 * imx335_probe() - I2C client device binding 994 * @client: pointer to i2c client device 995 * 996 * Return: 0 if successful, error code otherwise. 997 */ 998 static int imx335_probe(struct i2c_client *client) 999 { 1000 struct imx335 *imx335; 1001 int ret; 1002 1003 imx335 = devm_kzalloc(&client->dev, sizeof(*imx335), GFP_KERNEL); 1004 if (!imx335) 1005 return -ENOMEM; 1006 1007 imx335->dev = &client->dev; 1008 1009 /* Initialize subdev */ 1010 v4l2_i2c_subdev_init(&imx335->sd, client, &imx335_subdev_ops); 1011 1012 ret = imx335_parse_hw_config(imx335); 1013 if (ret) { 1014 dev_err(imx335->dev, "HW configuration is not supported"); 1015 return ret; 1016 } 1017 1018 mutex_init(&imx335->mutex); 1019 1020 ret = imx335_power_on(imx335->dev); 1021 if (ret) { 1022 dev_err(imx335->dev, "failed to power-on the sensor"); 1023 goto error_mutex_destroy; 1024 } 1025 1026 /* Check module identity */ 1027 ret = imx335_detect(imx335); 1028 if (ret) { 1029 dev_err(imx335->dev, "failed to find sensor: %d", ret); 1030 goto error_power_off; 1031 } 1032 1033 /* Set default mode to max resolution */ 1034 imx335->cur_mode = &supported_mode; 1035 imx335->vblank = imx335->cur_mode->vblank; 1036 1037 ret = imx335_init_controls(imx335); 1038 if (ret) { 1039 dev_err(imx335->dev, "failed to init controls: %d", ret); 1040 goto error_power_off; 1041 } 1042 1043 /* Initialize subdev */ 1044 imx335->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 1045 imx335->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 1046 1047 /* Initialize source pad */ 1048 imx335->pad.flags = MEDIA_PAD_FL_SOURCE; 1049 ret = media_entity_pads_init(&imx335->sd.entity, 1, &imx335->pad); 1050 if (ret) { 1051 dev_err(imx335->dev, "failed to init entity pads: %d", ret); 1052 goto error_handler_free; 1053 } 1054 1055 ret = v4l2_async_register_subdev_sensor(&imx335->sd); 1056 if (ret < 0) { 1057 dev_err(imx335->dev, 1058 "failed to register async subdev: %d", ret); 1059 goto error_media_entity; 1060 } 1061 1062 pm_runtime_set_active(imx335->dev); 1063 pm_runtime_enable(imx335->dev); 1064 pm_runtime_idle(imx335->dev); 1065 1066 return 0; 1067 1068 error_media_entity: 1069 media_entity_cleanup(&imx335->sd.entity); 1070 error_handler_free: 1071 v4l2_ctrl_handler_free(imx335->sd.ctrl_handler); 1072 error_power_off: 1073 imx335_power_off(imx335->dev); 1074 error_mutex_destroy: 1075 mutex_destroy(&imx335->mutex); 1076 1077 return ret; 1078 } 1079 1080 /** 1081 * imx335_remove() - I2C client device unbinding 1082 * @client: pointer to I2C client device 1083 * 1084 * Return: 0 if successful, error code otherwise. 1085 */ 1086 static void imx335_remove(struct i2c_client *client) 1087 { 1088 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1089 struct imx335 *imx335 = to_imx335(sd); 1090 1091 v4l2_async_unregister_subdev(sd); 1092 media_entity_cleanup(&sd->entity); 1093 v4l2_ctrl_handler_free(sd->ctrl_handler); 1094 1095 pm_runtime_disable(&client->dev); 1096 if (!pm_runtime_status_suspended(&client->dev)) 1097 imx335_power_off(&client->dev); 1098 pm_runtime_set_suspended(&client->dev); 1099 1100 mutex_destroy(&imx335->mutex); 1101 } 1102 1103 static const struct dev_pm_ops imx335_pm_ops = { 1104 SET_RUNTIME_PM_OPS(imx335_power_off, imx335_power_on, NULL) 1105 }; 1106 1107 static const struct of_device_id imx335_of_match[] = { 1108 { .compatible = "sony,imx335" }, 1109 { } 1110 }; 1111 1112 MODULE_DEVICE_TABLE(of, imx335_of_match); 1113 1114 static struct i2c_driver imx335_driver = { 1115 .probe = imx335_probe, 1116 .remove = imx335_remove, 1117 .driver = { 1118 .name = "imx335", 1119 .pm = &imx335_pm_ops, 1120 .of_match_table = imx335_of_match, 1121 }, 1122 }; 1123 1124 module_i2c_driver(imx335_driver); 1125 1126 MODULE_DESCRIPTION("Sony imx335 sensor driver"); 1127 MODULE_LICENSE("GPL"); 1128