1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Omnivision OV2680 CMOS Image Sensor driver 4 * 5 * Copyright (C) 2018 Linaro Ltd 6 * 7 * Based on OV5640 Sensor Driver 8 * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved. 9 * Copyright (C) 2014-2017 Mentor Graphics Inc. 10 * 11 */ 12 13#include <asm/unaligned.h> 14#include <linux/clk.h> 15#include <linux/delay.h> 16#include <linux/err.h> 17#include <linux/i2c.h> 18#include <linux/init.h> 19#include <linux/module.h> 20#include <linux/of_device.h> 21#include <linux/gpio/consumer.h> 22#include <linux/regulator/consumer.h> 23 24#include <media/v4l2-common.h> 25#include <media/v4l2-ctrls.h> 26#include <media/v4l2-subdev.h> 27 28#define OV2680_XVCLK_VALUE 24000000 29 30#define OV2680_CHIP_ID 0x2680 31 32#define OV2680_REG_STREAM_CTRL 0x0100 33#define OV2680_REG_SOFT_RESET 0x0103 34 35#define OV2680_REG_CHIP_ID_HIGH 0x300a 36#define OV2680_REG_CHIP_ID_LOW 0x300b 37 38#define OV2680_REG_R_MANUAL 0x3503 39#define OV2680_REG_GAIN_PK 0x350a 40#define OV2680_REG_EXPOSURE_PK_HIGH 0x3500 41#define OV2680_REG_TIMING_HTS 0x380c 42#define OV2680_REG_TIMING_VTS 0x380e 43#define OV2680_REG_FORMAT1 0x3820 44#define OV2680_REG_FORMAT2 0x3821 45 46#define OV2680_REG_ISP_CTRL00 0x5080 47 48#define OV2680_FRAME_RATE 30 49 50#define OV2680_REG_VALUE_8BIT 1 51#define OV2680_REG_VALUE_16BIT 2 52#define OV2680_REG_VALUE_24BIT 3 53 54#define OV2680_WIDTH_MAX 1600 55#define OV2680_HEIGHT_MAX 1200 56 57enum ov2680_mode_id { 58 OV2680_MODE_QUXGA_800_600, 59 OV2680_MODE_720P_1280_720, 60 OV2680_MODE_UXGA_1600_1200, 61 OV2680_MODE_MAX, 62}; 63 64struct reg_value { 65 u16 reg_addr; 66 u8 val; 67}; 68 69static const char * const ov2680_supply_name[] = { 70 "DOVDD", 71 "DVDD", 72 "AVDD", 73}; 74 75#define OV2680_NUM_SUPPLIES ARRAY_SIZE(ov2680_supply_name) 76 77struct ov2680_mode_info { 78 const char *name; 79 enum ov2680_mode_id id; 80 u32 width; 81 u32 height; 82 const struct reg_value *reg_data; 83 u32 reg_data_size; 84}; 85 86struct ov2680_ctrls { 87 struct v4l2_ctrl_handler handler; 88 struct v4l2_ctrl *exposure; 89 struct v4l2_ctrl *gain; 90 struct v4l2_ctrl *hflip; 91 struct v4l2_ctrl *vflip; 92 struct v4l2_ctrl *test_pattern; 93}; 94 95struct ov2680_dev { 96 struct i2c_client *i2c_client; 97 struct v4l2_subdev sd; 98 99 struct media_pad pad; 100 struct clk *xvclk; 101 u32 xvclk_freq; 102 struct regulator_bulk_data supplies[OV2680_NUM_SUPPLIES]; 103 104 struct gpio_desc *reset_gpio; 105 struct mutex lock; /* protect members */ 106 107 bool mode_pending_changes; 108 bool is_enabled; 109 bool is_streaming; 110 111 struct ov2680_ctrls ctrls; 112 struct v4l2_mbus_framefmt fmt; 113 struct v4l2_fract frame_interval; 114 115 const struct ov2680_mode_info *current_mode; 116}; 117 118static const char * const test_pattern_menu[] = { 119 "Disabled", 120 "Color Bars", 121 "Random Data", 122 "Square", 123 "Black Image", 124}; 125 126static const int ov2680_hv_flip_bayer_order[] = { 127 MEDIA_BUS_FMT_SBGGR10_1X10, 128 MEDIA_BUS_FMT_SGRBG10_1X10, 129 MEDIA_BUS_FMT_SGBRG10_1X10, 130 MEDIA_BUS_FMT_SRGGB10_1X10, 131}; 132 133static const struct reg_value ov2680_setting_30fps_QUXGA_800_600[] = { 134 {0x3086, 0x01}, {0x370a, 0x23}, {0x3808, 0x03}, {0x3809, 0x20}, 135 {0x380a, 0x02}, {0x380b, 0x58}, {0x380c, 0x06}, {0x380d, 0xac}, 136 {0x380e, 0x02}, {0x380f, 0x84}, {0x3811, 0x04}, {0x3813, 0x04}, 137 {0x3814, 0x31}, {0x3815, 0x31}, {0x3820, 0xc0}, {0x4008, 0x00}, 138 {0x4009, 0x03}, {0x4837, 0x1e}, {0x3501, 0x4e}, {0x3502, 0xe0}, 139 {0x3503, 0x03}, 140}; 141 142static const struct reg_value ov2680_setting_30fps_720P_1280_720[] = { 143 {0x3086, 0x00}, {0x3808, 0x05}, {0x3809, 0x00}, {0x380a, 0x02}, 144 {0x380b, 0xd0}, {0x380c, 0x06}, {0x380d, 0xa8}, {0x380e, 0x05}, 145 {0x380f, 0x0e}, {0x3811, 0x08}, {0x3813, 0x06}, {0x3814, 0x11}, 146 {0x3815, 0x11}, {0x3820, 0xc0}, {0x4008, 0x00}, 147}; 148 149static const struct reg_value ov2680_setting_30fps_UXGA_1600_1200[] = { 150 {0x3086, 0x00}, {0x3501, 0x4e}, {0x3502, 0xe0}, {0x3808, 0x06}, 151 {0x3809, 0x40}, {0x380a, 0x04}, {0x380b, 0xb0}, {0x380c, 0x06}, 152 {0x380d, 0xa8}, {0x380e, 0x05}, {0x380f, 0x0e}, {0x3811, 0x00}, 153 {0x3813, 0x00}, {0x3814, 0x11}, {0x3815, 0x11}, {0x3820, 0xc0}, 154 {0x4008, 0x00}, {0x4837, 0x18} 155}; 156 157static const struct ov2680_mode_info ov2680_mode_init_data = { 158 "mode_quxga_800_600", OV2680_MODE_QUXGA_800_600, 800, 600, 159 ov2680_setting_30fps_QUXGA_800_600, 160 ARRAY_SIZE(ov2680_setting_30fps_QUXGA_800_600), 161}; 162 163static const struct ov2680_mode_info ov2680_mode_data[OV2680_MODE_MAX] = { 164 {"mode_quxga_800_600", OV2680_MODE_QUXGA_800_600, 165 800, 600, ov2680_setting_30fps_QUXGA_800_600, 166 ARRAY_SIZE(ov2680_setting_30fps_QUXGA_800_600)}, 167 {"mode_720p_1280_720", OV2680_MODE_720P_1280_720, 168 1280, 720, ov2680_setting_30fps_720P_1280_720, 169 ARRAY_SIZE(ov2680_setting_30fps_720P_1280_720)}, 170 {"mode_uxga_1600_1200", OV2680_MODE_UXGA_1600_1200, 171 1600, 1200, ov2680_setting_30fps_UXGA_1600_1200, 172 ARRAY_SIZE(ov2680_setting_30fps_UXGA_1600_1200)}, 173}; 174 175static struct ov2680_dev *to_ov2680_dev(struct v4l2_subdev *sd) 176{ 177 return container_of(sd, struct ov2680_dev, sd); 178} 179 180static struct device *ov2680_to_dev(struct ov2680_dev *sensor) 181{ 182 return &sensor->i2c_client->dev; 183} 184 185static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 186{ 187 return &container_of(ctrl->handler, struct ov2680_dev, 188 ctrls.handler)->sd; 189} 190 191static int __ov2680_write_reg(struct ov2680_dev *sensor, u16 reg, 192 unsigned int len, u32 val) 193{ 194 struct i2c_client *client = sensor->i2c_client; 195 u8 buf[6]; 196 int ret; 197 198 if (len > 4) 199 return -EINVAL; 200 201 put_unaligned_be16(reg, buf); 202 put_unaligned_be32(val << (8 * (4 - len)), buf + 2); 203 ret = i2c_master_send(client, buf, len + 2); 204 if (ret != len + 2) { 205 dev_err(&client->dev, "write error: reg=0x%4x: %d\n", reg, ret); 206 return -EIO; 207 } 208 209 return 0; 210} 211 212#define ov2680_write_reg(s, r, v) \ 213 __ov2680_write_reg(s, r, OV2680_REG_VALUE_8BIT, v) 214 215#define ov2680_write_reg16(s, r, v) \ 216 __ov2680_write_reg(s, r, OV2680_REG_VALUE_16BIT, v) 217 218#define ov2680_write_reg24(s, r, v) \ 219 __ov2680_write_reg(s, r, OV2680_REG_VALUE_24BIT, v) 220 221static int __ov2680_read_reg(struct ov2680_dev *sensor, u16 reg, 222 unsigned int len, u32 *val) 223{ 224 struct i2c_client *client = sensor->i2c_client; 225 struct i2c_msg msgs[2]; 226 u8 addr_buf[2] = { reg >> 8, reg & 0xff }; 227 u8 data_buf[4] = { 0, }; 228 int ret; 229 230 if (len > 4) 231 return -EINVAL; 232 233 msgs[0].addr = client->addr; 234 msgs[0].flags = 0; 235 msgs[0].len = ARRAY_SIZE(addr_buf); 236 msgs[0].buf = addr_buf; 237 238 msgs[1].addr = client->addr; 239 msgs[1].flags = I2C_M_RD; 240 msgs[1].len = len; 241 msgs[1].buf = &data_buf[4 - len]; 242 243 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); 244 if (ret != ARRAY_SIZE(msgs)) { 245 dev_err(&client->dev, "read error: reg=0x%4x: %d\n", reg, ret); 246 return -EIO; 247 } 248 249 *val = get_unaligned_be32(data_buf); 250 251 return 0; 252} 253 254#define ov2680_read_reg(s, r, v) \ 255 __ov2680_read_reg(s, r, OV2680_REG_VALUE_8BIT, v) 256 257#define ov2680_read_reg16(s, r, v) \ 258 __ov2680_read_reg(s, r, OV2680_REG_VALUE_16BIT, v) 259 260#define ov2680_read_reg24(s, r, v) \ 261 __ov2680_read_reg(s, r, OV2680_REG_VALUE_24BIT, v) 262 263static int ov2680_mod_reg(struct ov2680_dev *sensor, u16 reg, u8 mask, u8 val) 264{ 265 u32 readval; 266 int ret; 267 268 ret = ov2680_read_reg(sensor, reg, &readval); 269 if (ret < 0) 270 return ret; 271 272 readval &= ~mask; 273 val &= mask; 274 val |= readval; 275 276 return ov2680_write_reg(sensor, reg, val); 277} 278 279static int ov2680_load_regs(struct ov2680_dev *sensor, 280 const struct ov2680_mode_info *mode) 281{ 282 const struct reg_value *regs = mode->reg_data; 283 unsigned int i; 284 int ret = 0; 285 u16 reg_addr; 286 u8 val; 287 288 for (i = 0; i < mode->reg_data_size; ++i, ++regs) { 289 reg_addr = regs->reg_addr; 290 val = regs->val; 291 292 ret = ov2680_write_reg(sensor, reg_addr, val); 293 if (ret) 294 break; 295 } 296 297 return ret; 298} 299 300static void ov2680_power_up(struct ov2680_dev *sensor) 301{ 302 if (!sensor->reset_gpio) 303 return; 304 305 gpiod_set_value(sensor->reset_gpio, 0); 306 usleep_range(5000, 10000); 307} 308 309static void ov2680_power_down(struct ov2680_dev *sensor) 310{ 311 if (!sensor->reset_gpio) 312 return; 313 314 gpiod_set_value(sensor->reset_gpio, 1); 315 usleep_range(5000, 10000); 316} 317 318static void ov2680_set_bayer_order(struct ov2680_dev *sensor) 319{ 320 int hv_flip = 0; 321 322 if (sensor->ctrls.vflip && sensor->ctrls.vflip->val) 323 hv_flip += 1; 324 325 if (sensor->ctrls.hflip && sensor->ctrls.hflip->val) 326 hv_flip += 2; 327 328 sensor->fmt.code = ov2680_hv_flip_bayer_order[hv_flip]; 329} 330 331static int ov2680_set_vflip(struct ov2680_dev *sensor, s32 val) 332{ 333 int ret; 334 335 if (sensor->is_streaming) 336 return -EBUSY; 337 338 ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, 339 BIT(2), val ? BIT(2) : 0); 340 if (ret < 0) 341 return ret; 342 343 ov2680_set_bayer_order(sensor); 344 return 0; 345} 346 347static int ov2680_set_hflip(struct ov2680_dev *sensor, s32 val) 348{ 349 int ret; 350 351 if (sensor->is_streaming) 352 return -EBUSY; 353 354 ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, 355 BIT(2), val ? BIT(2) : 0); 356 if (ret < 0) 357 return ret; 358 359 ov2680_set_bayer_order(sensor); 360 return 0; 361} 362 363static int ov2680_test_pattern_set(struct ov2680_dev *sensor, int value) 364{ 365 int ret; 366 367 if (!value) 368 return ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, BIT(7), 0); 369 370 ret = ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, 0x03, value - 1); 371 if (ret < 0) 372 return ret; 373 374 ret = ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, BIT(7), BIT(7)); 375 if (ret < 0) 376 return ret; 377 378 return 0; 379} 380 381static int ov2680_gain_set(struct ov2680_dev *sensor, u32 gain) 382{ 383 return ov2680_write_reg16(sensor, OV2680_REG_GAIN_PK, gain); 384} 385 386static int ov2680_exposure_set(struct ov2680_dev *sensor, u32 exp) 387{ 388 return ov2680_write_reg24(sensor, OV2680_REG_EXPOSURE_PK_HIGH, 389 exp << 4); 390} 391 392static int ov2680_stream_enable(struct ov2680_dev *sensor) 393{ 394 return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 1); 395} 396 397static int ov2680_stream_disable(struct ov2680_dev *sensor) 398{ 399 return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 0); 400} 401 402static int ov2680_mode_set(struct ov2680_dev *sensor) 403{ 404 int ret; 405 406 ret = ov2680_load_regs(sensor, sensor->current_mode); 407 if (ret < 0) 408 return ret; 409 410 /* Restore value of all ctrls */ 411 ret = __v4l2_ctrl_handler_setup(&sensor->ctrls.handler); 412 if (ret < 0) 413 return ret; 414 415 sensor->mode_pending_changes = false; 416 417 return 0; 418} 419 420static int ov2680_mode_restore(struct ov2680_dev *sensor) 421{ 422 int ret; 423 424 ret = ov2680_load_regs(sensor, &ov2680_mode_init_data); 425 if (ret < 0) 426 return ret; 427 428 return ov2680_mode_set(sensor); 429} 430 431static int ov2680_power_off(struct ov2680_dev *sensor) 432{ 433 if (!sensor->is_enabled) 434 return 0; 435 436 clk_disable_unprepare(sensor->xvclk); 437 ov2680_power_down(sensor); 438 regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies); 439 sensor->is_enabled = false; 440 441 return 0; 442} 443 444static int ov2680_power_on(struct ov2680_dev *sensor) 445{ 446 struct device *dev = ov2680_to_dev(sensor); 447 int ret; 448 449 if (sensor->is_enabled) 450 return 0; 451 452 ret = regulator_bulk_enable(OV2680_NUM_SUPPLIES, sensor->supplies); 453 if (ret < 0) { 454 dev_err(dev, "failed to enable regulators: %d\n", ret); 455 return ret; 456 } 457 458 if (!sensor->reset_gpio) { 459 ret = ov2680_write_reg(sensor, OV2680_REG_SOFT_RESET, 0x01); 460 if (ret != 0) { 461 dev_err(dev, "sensor soft reset failed\n"); 462 goto err_disable_regulators; 463 } 464 usleep_range(1000, 2000); 465 } else { 466 ov2680_power_down(sensor); 467 ov2680_power_up(sensor); 468 } 469 470 ret = clk_prepare_enable(sensor->xvclk); 471 if (ret < 0) 472 goto err_disable_regulators; 473 474 sensor->is_enabled = true; 475 476 /* Set clock lane into LP-11 state */ 477 ov2680_stream_enable(sensor); 478 usleep_range(1000, 2000); 479 ov2680_stream_disable(sensor); 480 481 return 0; 482 483err_disable_regulators: 484 regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies); 485 return ret; 486} 487 488static int ov2680_s_power(struct v4l2_subdev *sd, int on) 489{ 490 struct ov2680_dev *sensor = to_ov2680_dev(sd); 491 int ret = 0; 492 493 mutex_lock(&sensor->lock); 494 495 if (on) 496 ret = ov2680_power_on(sensor); 497 else 498 ret = ov2680_power_off(sensor); 499 500 if (on && ret == 0) 501 ret = ov2680_mode_restore(sensor); 502 503 mutex_unlock(&sensor->lock); 504 505 return ret; 506} 507 508static int ov2680_s_g_frame_interval(struct v4l2_subdev *sd, 509 struct v4l2_subdev_frame_interval *fi) 510{ 511 struct ov2680_dev *sensor = to_ov2680_dev(sd); 512 513 mutex_lock(&sensor->lock); 514 fi->interval = sensor->frame_interval; 515 mutex_unlock(&sensor->lock); 516 517 return 0; 518} 519 520static int ov2680_s_stream(struct v4l2_subdev *sd, int enable) 521{ 522 struct ov2680_dev *sensor = to_ov2680_dev(sd); 523 int ret = 0; 524 525 mutex_lock(&sensor->lock); 526 527 if (sensor->is_streaming == !!enable) 528 goto unlock; 529 530 if (enable && sensor->mode_pending_changes) { 531 ret = ov2680_mode_set(sensor); 532 if (ret < 0) 533 goto unlock; 534 } 535 536 if (enable) 537 ret = ov2680_stream_enable(sensor); 538 else 539 ret = ov2680_stream_disable(sensor); 540 541 sensor->is_streaming = !!enable; 542 543unlock: 544 mutex_unlock(&sensor->lock); 545 546 return ret; 547} 548 549static int ov2680_enum_mbus_code(struct v4l2_subdev *sd, 550 struct v4l2_subdev_pad_config *cfg, 551 struct v4l2_subdev_mbus_code_enum *code) 552{ 553 struct ov2680_dev *sensor = to_ov2680_dev(sd); 554 555 if (code->pad != 0 || code->index != 0) 556 return -EINVAL; 557 558 code->code = sensor->fmt.code; 559 560 return 0; 561} 562 563static int ov2680_get_fmt(struct v4l2_subdev *sd, 564 struct v4l2_subdev_pad_config *cfg, 565 struct v4l2_subdev_format *format) 566{ 567 struct ov2680_dev *sensor = to_ov2680_dev(sd); 568 struct v4l2_mbus_framefmt *fmt = NULL; 569 int ret = 0; 570 571 if (format->pad != 0) 572 return -EINVAL; 573 574 mutex_lock(&sensor->lock); 575 576 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 577#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API 578 fmt = v4l2_subdev_get_try_format(&sensor->sd, cfg, format->pad); 579#else 580 ret = -EINVAL; 581#endif 582 } else { 583 fmt = &sensor->fmt; 584 } 585 586 if (fmt) 587 format->format = *fmt; 588 589 mutex_unlock(&sensor->lock); 590 591 return ret; 592} 593 594static int ov2680_set_fmt(struct v4l2_subdev *sd, 595 struct v4l2_subdev_pad_config *cfg, 596 struct v4l2_subdev_format *format) 597{ 598 struct ov2680_dev *sensor = to_ov2680_dev(sd); 599 struct v4l2_mbus_framefmt *fmt = &format->format; 600#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API 601 struct v4l2_mbus_framefmt *try_fmt; 602#endif 603 const struct ov2680_mode_info *mode; 604 int ret = 0; 605 606 if (format->pad != 0) 607 return -EINVAL; 608 609 mutex_lock(&sensor->lock); 610 611 if (sensor->is_streaming) { 612 ret = -EBUSY; 613 goto unlock; 614 } 615 616 mode = v4l2_find_nearest_size(ov2680_mode_data, 617 ARRAY_SIZE(ov2680_mode_data), width, 618 height, fmt->width, fmt->height); 619 if (!mode) { 620 ret = -EINVAL; 621 goto unlock; 622 } 623 624 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 625#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API 626 try_fmt = v4l2_subdev_get_try_format(sd, cfg, 0); 627 format->format = *try_fmt; 628#endif 629 goto unlock; 630 } 631 632 fmt->width = mode->width; 633 fmt->height = mode->height; 634 fmt->code = sensor->fmt.code; 635 fmt->colorspace = sensor->fmt.colorspace; 636 637 sensor->current_mode = mode; 638 sensor->fmt = format->format; 639 sensor->mode_pending_changes = true; 640 641unlock: 642 mutex_unlock(&sensor->lock); 643 644 return ret; 645} 646 647static int ov2680_init_cfg(struct v4l2_subdev *sd, 648 struct v4l2_subdev_pad_config *cfg) 649{ 650 struct v4l2_subdev_format fmt = { 651 .which = cfg ? V4L2_SUBDEV_FORMAT_TRY 652 : V4L2_SUBDEV_FORMAT_ACTIVE, 653 .format = { 654 .width = 800, 655 .height = 600, 656 } 657 }; 658 659 return ov2680_set_fmt(sd, cfg, &fmt); 660} 661 662static int ov2680_enum_frame_size(struct v4l2_subdev *sd, 663 struct v4l2_subdev_pad_config *cfg, 664 struct v4l2_subdev_frame_size_enum *fse) 665{ 666 int index = fse->index; 667 668 if (index >= OV2680_MODE_MAX || index < 0) 669 return -EINVAL; 670 671 fse->min_width = ov2680_mode_data[index].width; 672 fse->min_height = ov2680_mode_data[index].height; 673 fse->max_width = ov2680_mode_data[index].width; 674 fse->max_height = ov2680_mode_data[index].height; 675 676 return 0; 677} 678 679static int ov2680_enum_frame_interval(struct v4l2_subdev *sd, 680 struct v4l2_subdev_pad_config *cfg, 681 struct v4l2_subdev_frame_interval_enum *fie) 682{ 683 struct v4l2_fract tpf; 684 685 if (fie->index >= OV2680_MODE_MAX || fie->width > OV2680_WIDTH_MAX || 686 fie->height > OV2680_HEIGHT_MAX || 687 fie->which > V4L2_SUBDEV_FORMAT_ACTIVE) 688 return -EINVAL; 689 690 tpf.denominator = OV2680_FRAME_RATE; 691 tpf.numerator = 1; 692 693 fie->interval = tpf; 694 695 return 0; 696} 697 698static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl) 699{ 700 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 701 struct ov2680_dev *sensor = to_ov2680_dev(sd); 702 703 if (!sensor->is_enabled) 704 return 0; 705 706 switch (ctrl->id) { 707 case V4L2_CID_GAIN: 708 return ov2680_gain_set(sensor, ctrl->val); 709 case V4L2_CID_EXPOSURE: 710 return ov2680_exposure_set(sensor, ctrl->val); 711 case V4L2_CID_VFLIP: 712 return ov2680_set_vflip(sensor, ctrl->val); 713 case V4L2_CID_HFLIP: 714 return ov2680_set_hflip(sensor, ctrl->val); 715 case V4L2_CID_TEST_PATTERN: 716 return ov2680_test_pattern_set(sensor, ctrl->val); 717 default: 718 break; 719 } 720 721 return -EINVAL; 722} 723 724static const struct v4l2_ctrl_ops ov2680_ctrl_ops = { 725 .s_ctrl = ov2680_s_ctrl, 726}; 727 728static const struct v4l2_subdev_core_ops ov2680_core_ops = { 729 .s_power = ov2680_s_power, 730}; 731 732static const struct v4l2_subdev_video_ops ov2680_video_ops = { 733 .g_frame_interval = ov2680_s_g_frame_interval, 734 .s_frame_interval = ov2680_s_g_frame_interval, 735 .s_stream = ov2680_s_stream, 736}; 737 738static const struct v4l2_subdev_pad_ops ov2680_pad_ops = { 739 .init_cfg = ov2680_init_cfg, 740 .enum_mbus_code = ov2680_enum_mbus_code, 741 .get_fmt = ov2680_get_fmt, 742 .set_fmt = ov2680_set_fmt, 743 .enum_frame_size = ov2680_enum_frame_size, 744 .enum_frame_interval = ov2680_enum_frame_interval, 745}; 746 747static const struct v4l2_subdev_ops ov2680_subdev_ops = { 748 .core = &ov2680_core_ops, 749 .video = &ov2680_video_ops, 750 .pad = &ov2680_pad_ops, 751}; 752 753static int ov2680_mode_init(struct ov2680_dev *sensor) 754{ 755 const struct ov2680_mode_info *init_mode; 756 757 /* set initial mode */ 758 sensor->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10; 759 sensor->fmt.width = 800; 760 sensor->fmt.height = 600; 761 sensor->fmt.field = V4L2_FIELD_NONE; 762 sensor->fmt.colorspace = V4L2_COLORSPACE_SRGB; 763 764 sensor->frame_interval.denominator = OV2680_FRAME_RATE; 765 sensor->frame_interval.numerator = 1; 766 767 init_mode = &ov2680_mode_init_data; 768 769 sensor->current_mode = init_mode; 770 771 sensor->mode_pending_changes = true; 772 773 return 0; 774} 775 776static int ov2680_v4l2_register(struct ov2680_dev *sensor) 777{ 778 const struct v4l2_ctrl_ops *ops = &ov2680_ctrl_ops; 779 struct ov2680_ctrls *ctrls = &sensor->ctrls; 780 struct v4l2_ctrl_handler *hdl = &ctrls->handler; 781 int ret = 0; 782 783 v4l2_i2c_subdev_init(&sensor->sd, sensor->i2c_client, 784 &ov2680_subdev_ops); 785 786#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API 787 sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; 788#endif 789 sensor->pad.flags = MEDIA_PAD_FL_SOURCE; 790 sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 791 792 ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad); 793 if (ret < 0) 794 return ret; 795 796 v4l2_ctrl_handler_init(hdl, 5); 797 798 hdl->lock = &sensor->lock; 799 800 ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0); 801 ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0); 802 803 ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, 804 &ov2680_ctrl_ops, V4L2_CID_TEST_PATTERN, 805 ARRAY_SIZE(test_pattern_menu) - 1, 806 0, 0, test_pattern_menu); 807 808 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, 809 0, 32767, 1, 0); 810 811 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 2047, 1, 0); 812 813 if (hdl->error) { 814 ret = hdl->error; 815 goto cleanup_entity; 816 } 817 818 ctrls->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; 819 ctrls->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; 820 821 sensor->sd.ctrl_handler = hdl; 822 823 ret = v4l2_async_register_subdev(&sensor->sd); 824 if (ret < 0) 825 goto cleanup_entity; 826 827 return 0; 828 829cleanup_entity: 830 media_entity_cleanup(&sensor->sd.entity); 831 v4l2_ctrl_handler_free(hdl); 832 833 return ret; 834} 835 836static int ov2680_get_regulators(struct ov2680_dev *sensor) 837{ 838 int i; 839 840 for (i = 0; i < OV2680_NUM_SUPPLIES; i++) 841 sensor->supplies[i].supply = ov2680_supply_name[i]; 842 843 return devm_regulator_bulk_get(&sensor->i2c_client->dev, 844 OV2680_NUM_SUPPLIES, 845 sensor->supplies); 846} 847 848static int ov2680_check_id(struct ov2680_dev *sensor) 849{ 850 struct device *dev = ov2680_to_dev(sensor); 851 u32 chip_id; 852 int ret; 853 854 ov2680_power_on(sensor); 855 856 ret = ov2680_read_reg16(sensor, OV2680_REG_CHIP_ID_HIGH, &chip_id); 857 if (ret < 0) { 858 dev_err(dev, "failed to read chip id high\n"); 859 return -ENODEV; 860 } 861 862 if (chip_id != OV2680_CHIP_ID) { 863 dev_err(dev, "chip id: 0x%04x does not match expected 0x%04x\n", 864 chip_id, OV2680_CHIP_ID); 865 return -ENODEV; 866 } 867 868 return 0; 869} 870 871static int ov2680_parse_dt(struct ov2680_dev *sensor) 872{ 873 struct device *dev = ov2680_to_dev(sensor); 874 int ret; 875 876 sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset", 877 GPIOD_OUT_HIGH); 878 ret = PTR_ERR_OR_ZERO(sensor->reset_gpio); 879 if (ret < 0) { 880 dev_dbg(dev, "error while getting reset gpio: %d\n", ret); 881 return ret; 882 } 883 884 sensor->xvclk = devm_clk_get(dev, "xvclk"); 885 if (IS_ERR(sensor->xvclk)) { 886 dev_err(dev, "xvclk clock missing or invalid\n"); 887 return PTR_ERR(sensor->xvclk); 888 } 889 890 sensor->xvclk_freq = clk_get_rate(sensor->xvclk); 891 if (sensor->xvclk_freq != OV2680_XVCLK_VALUE) { 892 dev_err(dev, "wrong xvclk frequency %d HZ, expected: %d Hz\n", 893 sensor->xvclk_freq, OV2680_XVCLK_VALUE); 894 return -EINVAL; 895 } 896 897 return 0; 898} 899 900static int ov2680_probe(struct i2c_client *client) 901{ 902 struct device *dev = &client->dev; 903 struct ov2680_dev *sensor; 904 int ret; 905 906 sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); 907 if (!sensor) 908 return -ENOMEM; 909 910 sensor->i2c_client = client; 911 912 ret = ov2680_parse_dt(sensor); 913 if (ret < 0) 914 return -EINVAL; 915 916 ret = ov2680_mode_init(sensor); 917 if (ret < 0) 918 return ret; 919 920 ret = ov2680_get_regulators(sensor); 921 if (ret < 0) { 922 dev_err(dev, "failed to get regulators\n"); 923 return ret; 924 } 925 926 mutex_init(&sensor->lock); 927 928 ret = ov2680_check_id(sensor); 929 if (ret < 0) 930 goto lock_destroy; 931 932 ret = ov2680_v4l2_register(sensor); 933 if (ret < 0) 934 goto lock_destroy; 935 936 dev_info(dev, "ov2680 init correctly\n"); 937 938 return 0; 939 940lock_destroy: 941 dev_err(dev, "ov2680 init fail: %d\n", ret); 942 mutex_destroy(&sensor->lock); 943 944 return ret; 945} 946 947static int ov2680_remove(struct i2c_client *client) 948{ 949 struct v4l2_subdev *sd = i2c_get_clientdata(client); 950 struct ov2680_dev *sensor = to_ov2680_dev(sd); 951 952 v4l2_async_unregister_subdev(&sensor->sd); 953 mutex_destroy(&sensor->lock); 954 media_entity_cleanup(&sensor->sd.entity); 955 v4l2_ctrl_handler_free(&sensor->ctrls.handler); 956 957 return 0; 958} 959 960static int __maybe_unused ov2680_suspend(struct device *dev) 961{ 962 struct i2c_client *client = to_i2c_client(dev); 963 struct v4l2_subdev *sd = i2c_get_clientdata(client); 964 struct ov2680_dev *sensor = to_ov2680_dev(sd); 965 966 if (sensor->is_streaming) 967 ov2680_stream_disable(sensor); 968 969 return 0; 970} 971 972static int __maybe_unused ov2680_resume(struct device *dev) 973{ 974 struct i2c_client *client = to_i2c_client(dev); 975 struct v4l2_subdev *sd = i2c_get_clientdata(client); 976 struct ov2680_dev *sensor = to_ov2680_dev(sd); 977 int ret; 978 979 if (sensor->is_streaming) { 980 ret = ov2680_stream_enable(sensor); 981 if (ret < 0) 982 goto stream_disable; 983 } 984 985 return 0; 986 987stream_disable: 988 ov2680_stream_disable(sensor); 989 sensor->is_streaming = false; 990 991 return ret; 992} 993 994static const struct dev_pm_ops ov2680_pm_ops = { 995 SET_SYSTEM_SLEEP_PM_OPS(ov2680_suspend, ov2680_resume) 996}; 997 998static const struct of_device_id ov2680_dt_ids[] = { 999 { .compatible = "ovti,ov2680" }, 1000 { /* sentinel */ }, 1001}; 1002MODULE_DEVICE_TABLE(of, ov2680_dt_ids); 1003 1004static struct i2c_driver ov2680_i2c_driver = { 1005 .driver = { 1006 .name = "ov2680", 1007 .pm = &ov2680_pm_ops, 1008 .of_match_table = of_match_ptr(ov2680_dt_ids), 1009 }, 1010 .probe_new = ov2680_probe, 1011 .remove = ov2680_remove, 1012}; 1013module_i2c_driver(ov2680_i2c_driver); 1014 1015MODULE_AUTHOR("Rui Miguel Silva <rui.silva@linaro.org>"); 1016MODULE_DESCRIPTION("OV2680 CMOS Image Sensor driver"); 1017MODULE_LICENSE("GPL v2"); 1018