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/mod_devicetable.h> 20 #include <linux/module.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 57 enum 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 64 struct reg_value { 65 u16 reg_addr; 66 u8 val; 67 }; 68 69 static 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 77 struct 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 86 struct 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 95 struct 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 }; 117 118 static const char * const test_pattern_menu[] = { 119 "Disabled", 120 "Color Bars", 121 "Random Data", 122 "Square", 123 "Black Image", 124 }; 125 126 static 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 }; 132 133 static 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 }; 141 142 static 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 }; 148 149 static 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 }; 156 157 static 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 }; 162 163 static 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 }; 174 175 static struct ov2680_dev *to_ov2680_dev(struct v4l2_subdev *sd) 176 { 177 return container_of(sd, struct ov2680_dev, sd); 178 } 179 180 static struct device *ov2680_to_dev(struct ov2680_dev *sensor) 181 { 182 return &sensor->i2c_client->dev; 183 } 184 185 static 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 } 190 191 static 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) 220 221 static 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) 262 263 static 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 } 278 279 static 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 } 299 300 static 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 } 308 309 static 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 } 317 318 static 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 } 330 331 static 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 } 346 347 static 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 } 362 363 static 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 } 380 381 static int ov2680_gain_set(struct ov2680_dev *sensor, u32 gain) 382 { 383 return ov2680_write_reg16(sensor, OV2680_REG_GAIN_PK, gain); 384 } 385 386 static 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 } 391 392 static int ov2680_stream_enable(struct ov2680_dev *sensor) 393 { 394 return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 1); 395 } 396 397 static int ov2680_stream_disable(struct ov2680_dev *sensor) 398 { 399 return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 0); 400 } 401 402 static 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 } 419 420 static 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 } 430 431 static 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 } 443 444 static 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 return ret; 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 return ret; 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 } 483 484 static int ov2680_s_power(struct v4l2_subdev *sd, int on) 485 { 486 struct ov2680_dev *sensor = to_ov2680_dev(sd); 487 int ret = 0; 488 489 mutex_lock(&sensor->lock); 490 491 if (on) 492 ret = ov2680_power_on(sensor); 493 else 494 ret = ov2680_power_off(sensor); 495 496 if (on && ret == 0) 497 ret = ov2680_mode_restore(sensor); 498 499 mutex_unlock(&sensor->lock); 500 501 return ret; 502 } 503 504 static int ov2680_s_g_frame_interval(struct v4l2_subdev *sd, 505 struct v4l2_subdev_frame_interval *fi) 506 { 507 struct ov2680_dev *sensor = to_ov2680_dev(sd); 508 509 mutex_lock(&sensor->lock); 510 fi->interval = sensor->frame_interval; 511 mutex_unlock(&sensor->lock); 512 513 return 0; 514 } 515 516 static int ov2680_s_stream(struct v4l2_subdev *sd, int enable) 517 { 518 struct ov2680_dev *sensor = to_ov2680_dev(sd); 519 int ret = 0; 520 521 mutex_lock(&sensor->lock); 522 523 if (sensor->is_streaming == !!enable) 524 goto unlock; 525 526 if (enable && sensor->mode_pending_changes) { 527 ret = ov2680_mode_set(sensor); 528 if (ret < 0) 529 goto unlock; 530 } 531 532 if (enable) 533 ret = ov2680_stream_enable(sensor); 534 else 535 ret = ov2680_stream_disable(sensor); 536 537 sensor->is_streaming = !!enable; 538 539 unlock: 540 mutex_unlock(&sensor->lock); 541 542 return ret; 543 } 544 545 static int ov2680_enum_mbus_code(struct v4l2_subdev *sd, 546 struct v4l2_subdev_state *sd_state, 547 struct v4l2_subdev_mbus_code_enum *code) 548 { 549 struct ov2680_dev *sensor = to_ov2680_dev(sd); 550 551 if (code->pad != 0 || code->index != 0) 552 return -EINVAL; 553 554 code->code = sensor->fmt.code; 555 556 return 0; 557 } 558 559 static int ov2680_get_fmt(struct v4l2_subdev *sd, 560 struct v4l2_subdev_state *sd_state, 561 struct v4l2_subdev_format *format) 562 { 563 struct ov2680_dev *sensor = to_ov2680_dev(sd); 564 struct v4l2_mbus_framefmt *fmt = NULL; 565 566 if (format->pad != 0) 567 return -EINVAL; 568 569 mutex_lock(&sensor->lock); 570 571 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 572 fmt = v4l2_subdev_get_try_format(&sensor->sd, sd_state, 573 format->pad); 574 } else { 575 fmt = &sensor->fmt; 576 } 577 578 format->format = *fmt; 579 580 mutex_unlock(&sensor->lock); 581 582 return 0; 583 } 584 585 static int ov2680_set_fmt(struct v4l2_subdev *sd, 586 struct v4l2_subdev_state *sd_state, 587 struct v4l2_subdev_format *format) 588 { 589 struct ov2680_dev *sensor = to_ov2680_dev(sd); 590 struct v4l2_mbus_framefmt *fmt = &format->format; 591 struct v4l2_mbus_framefmt *try_fmt; 592 const struct ov2680_mode_info *mode; 593 int ret = 0; 594 595 if (format->pad != 0) 596 return -EINVAL; 597 598 mode = v4l2_find_nearest_size(ov2680_mode_data, 599 ARRAY_SIZE(ov2680_mode_data), width, 600 height, fmt->width, fmt->height); 601 if (!mode) 602 return -EINVAL; 603 604 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 605 try_fmt = v4l2_subdev_get_try_format(sd, sd_state, 0); 606 format->format = *try_fmt; 607 return 0; 608 } 609 610 mutex_lock(&sensor->lock); 611 612 if (sensor->is_streaming) { 613 ret = -EBUSY; 614 goto unlock; 615 } 616 617 fmt->width = mode->width; 618 fmt->height = mode->height; 619 fmt->code = sensor->fmt.code; 620 fmt->colorspace = sensor->fmt.colorspace; 621 622 sensor->current_mode = mode; 623 sensor->fmt = format->format; 624 sensor->mode_pending_changes = true; 625 626 unlock: 627 mutex_unlock(&sensor->lock); 628 629 return ret; 630 } 631 632 static int ov2680_init_cfg(struct v4l2_subdev *sd, 633 struct v4l2_subdev_state *sd_state) 634 { 635 struct v4l2_subdev_format fmt = { 636 .which = sd_state ? V4L2_SUBDEV_FORMAT_TRY 637 : V4L2_SUBDEV_FORMAT_ACTIVE, 638 .format = { 639 .width = 800, 640 .height = 600, 641 } 642 }; 643 644 return ov2680_set_fmt(sd, sd_state, &fmt); 645 } 646 647 static int ov2680_enum_frame_size(struct v4l2_subdev *sd, 648 struct v4l2_subdev_state *sd_state, 649 struct v4l2_subdev_frame_size_enum *fse) 650 { 651 int index = fse->index; 652 653 if (index >= OV2680_MODE_MAX || index < 0) 654 return -EINVAL; 655 656 fse->min_width = ov2680_mode_data[index].width; 657 fse->min_height = ov2680_mode_data[index].height; 658 fse->max_width = ov2680_mode_data[index].width; 659 fse->max_height = ov2680_mode_data[index].height; 660 661 return 0; 662 } 663 664 static int ov2680_enum_frame_interval(struct v4l2_subdev *sd, 665 struct v4l2_subdev_state *sd_state, 666 struct v4l2_subdev_frame_interval_enum *fie) 667 { 668 struct v4l2_fract tpf; 669 670 if (fie->index >= OV2680_MODE_MAX || fie->width > OV2680_WIDTH_MAX || 671 fie->height > OV2680_HEIGHT_MAX || 672 fie->which > V4L2_SUBDEV_FORMAT_ACTIVE) 673 return -EINVAL; 674 675 tpf.denominator = OV2680_FRAME_RATE; 676 tpf.numerator = 1; 677 678 fie->interval = tpf; 679 680 return 0; 681 } 682 683 static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl) 684 { 685 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 686 struct ov2680_dev *sensor = to_ov2680_dev(sd); 687 688 if (!sensor->is_enabled) 689 return 0; 690 691 switch (ctrl->id) { 692 case V4L2_CID_GAIN: 693 return ov2680_gain_set(sensor, ctrl->val); 694 case V4L2_CID_EXPOSURE: 695 return ov2680_exposure_set(sensor, ctrl->val); 696 case V4L2_CID_VFLIP: 697 return ov2680_set_vflip(sensor, ctrl->val); 698 case V4L2_CID_HFLIP: 699 return ov2680_set_hflip(sensor, ctrl->val); 700 case V4L2_CID_TEST_PATTERN: 701 return ov2680_test_pattern_set(sensor, ctrl->val); 702 default: 703 break; 704 } 705 706 return -EINVAL; 707 } 708 709 static const struct v4l2_ctrl_ops ov2680_ctrl_ops = { 710 .s_ctrl = ov2680_s_ctrl, 711 }; 712 713 static const struct v4l2_subdev_core_ops ov2680_core_ops = { 714 .s_power = ov2680_s_power, 715 }; 716 717 static const struct v4l2_subdev_video_ops ov2680_video_ops = { 718 .g_frame_interval = ov2680_s_g_frame_interval, 719 .s_frame_interval = ov2680_s_g_frame_interval, 720 .s_stream = ov2680_s_stream, 721 }; 722 723 static const struct v4l2_subdev_pad_ops ov2680_pad_ops = { 724 .init_cfg = ov2680_init_cfg, 725 .enum_mbus_code = ov2680_enum_mbus_code, 726 .get_fmt = ov2680_get_fmt, 727 .set_fmt = ov2680_set_fmt, 728 .enum_frame_size = ov2680_enum_frame_size, 729 .enum_frame_interval = ov2680_enum_frame_interval, 730 }; 731 732 static const struct v4l2_subdev_ops ov2680_subdev_ops = { 733 .core = &ov2680_core_ops, 734 .video = &ov2680_video_ops, 735 .pad = &ov2680_pad_ops, 736 }; 737 738 static int ov2680_mode_init(struct ov2680_dev *sensor) 739 { 740 const struct ov2680_mode_info *init_mode; 741 742 /* set initial mode */ 743 sensor->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10; 744 sensor->fmt.width = 800; 745 sensor->fmt.height = 600; 746 sensor->fmt.field = V4L2_FIELD_NONE; 747 sensor->fmt.colorspace = V4L2_COLORSPACE_SRGB; 748 749 sensor->frame_interval.denominator = OV2680_FRAME_RATE; 750 sensor->frame_interval.numerator = 1; 751 752 init_mode = &ov2680_mode_init_data; 753 754 sensor->current_mode = init_mode; 755 756 sensor->mode_pending_changes = true; 757 758 return 0; 759 } 760 761 static int ov2680_v4l2_register(struct ov2680_dev *sensor) 762 { 763 const struct v4l2_ctrl_ops *ops = &ov2680_ctrl_ops; 764 struct ov2680_ctrls *ctrls = &sensor->ctrls; 765 struct v4l2_ctrl_handler *hdl = &ctrls->handler; 766 int ret = 0; 767 768 v4l2_i2c_subdev_init(&sensor->sd, sensor->i2c_client, 769 &ov2680_subdev_ops); 770 771 sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; 772 sensor->pad.flags = MEDIA_PAD_FL_SOURCE; 773 sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 774 775 ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad); 776 if (ret < 0) 777 return ret; 778 779 v4l2_ctrl_handler_init(hdl, 5); 780 781 hdl->lock = &sensor->lock; 782 783 ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0); 784 ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0); 785 786 ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, 787 &ov2680_ctrl_ops, V4L2_CID_TEST_PATTERN, 788 ARRAY_SIZE(test_pattern_menu) - 1, 789 0, 0, test_pattern_menu); 790 791 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, 792 0, 32767, 1, 0); 793 794 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 2047, 1, 0); 795 796 if (hdl->error) { 797 ret = hdl->error; 798 goto cleanup_entity; 799 } 800 801 ctrls->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; 802 ctrls->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; 803 804 sensor->sd.ctrl_handler = hdl; 805 806 ret = v4l2_async_register_subdev(&sensor->sd); 807 if (ret < 0) 808 goto cleanup_entity; 809 810 return 0; 811 812 cleanup_entity: 813 media_entity_cleanup(&sensor->sd.entity); 814 v4l2_ctrl_handler_free(hdl); 815 816 return ret; 817 } 818 819 static int ov2680_get_regulators(struct ov2680_dev *sensor) 820 { 821 int i; 822 823 for (i = 0; i < OV2680_NUM_SUPPLIES; i++) 824 sensor->supplies[i].supply = ov2680_supply_name[i]; 825 826 return devm_regulator_bulk_get(&sensor->i2c_client->dev, 827 OV2680_NUM_SUPPLIES, 828 sensor->supplies); 829 } 830 831 static int ov2680_check_id(struct ov2680_dev *sensor) 832 { 833 struct device *dev = ov2680_to_dev(sensor); 834 u32 chip_id; 835 int ret; 836 837 ov2680_power_on(sensor); 838 839 ret = ov2680_read_reg16(sensor, OV2680_REG_CHIP_ID_HIGH, &chip_id); 840 if (ret < 0) { 841 dev_err(dev, "failed to read chip id high\n"); 842 return -ENODEV; 843 } 844 845 if (chip_id != OV2680_CHIP_ID) { 846 dev_err(dev, "chip id: 0x%04x does not match expected 0x%04x\n", 847 chip_id, OV2680_CHIP_ID); 848 return -ENODEV; 849 } 850 851 return 0; 852 } 853 854 static int ov2680_parse_dt(struct ov2680_dev *sensor) 855 { 856 struct device *dev = ov2680_to_dev(sensor); 857 int ret; 858 859 sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset", 860 GPIOD_OUT_HIGH); 861 ret = PTR_ERR_OR_ZERO(sensor->reset_gpio); 862 if (ret < 0) { 863 dev_dbg(dev, "error while getting reset gpio: %d\n", ret); 864 return ret; 865 } 866 867 sensor->xvclk = devm_clk_get(dev, "xvclk"); 868 if (IS_ERR(sensor->xvclk)) { 869 dev_err(dev, "xvclk clock missing or invalid\n"); 870 return PTR_ERR(sensor->xvclk); 871 } 872 873 sensor->xvclk_freq = clk_get_rate(sensor->xvclk); 874 if (sensor->xvclk_freq != OV2680_XVCLK_VALUE) { 875 dev_err(dev, "wrong xvclk frequency %d HZ, expected: %d Hz\n", 876 sensor->xvclk_freq, OV2680_XVCLK_VALUE); 877 return -EINVAL; 878 } 879 880 return 0; 881 } 882 883 static int ov2680_probe(struct i2c_client *client) 884 { 885 struct device *dev = &client->dev; 886 struct ov2680_dev *sensor; 887 int ret; 888 889 sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); 890 if (!sensor) 891 return -ENOMEM; 892 893 sensor->i2c_client = client; 894 895 ret = ov2680_parse_dt(sensor); 896 if (ret < 0) 897 return -EINVAL; 898 899 ret = ov2680_mode_init(sensor); 900 if (ret < 0) 901 return ret; 902 903 ret = ov2680_get_regulators(sensor); 904 if (ret < 0) { 905 dev_err(dev, "failed to get regulators\n"); 906 return ret; 907 } 908 909 mutex_init(&sensor->lock); 910 911 ret = ov2680_check_id(sensor); 912 if (ret < 0) 913 goto lock_destroy; 914 915 ret = ov2680_v4l2_register(sensor); 916 if (ret < 0) 917 goto lock_destroy; 918 919 dev_info(dev, "ov2680 init correctly\n"); 920 921 return 0; 922 923 lock_destroy: 924 dev_err(dev, "ov2680 init fail: %d\n", ret); 925 mutex_destroy(&sensor->lock); 926 927 return ret; 928 } 929 930 static void ov2680_remove(struct i2c_client *client) 931 { 932 struct v4l2_subdev *sd = i2c_get_clientdata(client); 933 struct ov2680_dev *sensor = to_ov2680_dev(sd); 934 935 v4l2_async_unregister_subdev(&sensor->sd); 936 mutex_destroy(&sensor->lock); 937 media_entity_cleanup(&sensor->sd.entity); 938 v4l2_ctrl_handler_free(&sensor->ctrls.handler); 939 } 940 941 static int __maybe_unused ov2680_suspend(struct device *dev) 942 { 943 struct v4l2_subdev *sd = dev_get_drvdata(dev); 944 struct ov2680_dev *sensor = to_ov2680_dev(sd); 945 946 if (sensor->is_streaming) 947 ov2680_stream_disable(sensor); 948 949 return 0; 950 } 951 952 static int __maybe_unused ov2680_resume(struct device *dev) 953 { 954 struct v4l2_subdev *sd = dev_get_drvdata(dev); 955 struct ov2680_dev *sensor = to_ov2680_dev(sd); 956 int ret; 957 958 if (sensor->is_streaming) { 959 ret = ov2680_stream_enable(sensor); 960 if (ret < 0) 961 goto stream_disable; 962 } 963 964 return 0; 965 966 stream_disable: 967 ov2680_stream_disable(sensor); 968 sensor->is_streaming = false; 969 970 return ret; 971 } 972 973 static const struct dev_pm_ops ov2680_pm_ops = { 974 SET_SYSTEM_SLEEP_PM_OPS(ov2680_suspend, ov2680_resume) 975 }; 976 977 static const struct of_device_id ov2680_dt_ids[] = { 978 { .compatible = "ovti,ov2680" }, 979 { /* sentinel */ }, 980 }; 981 MODULE_DEVICE_TABLE(of, ov2680_dt_ids); 982 983 static struct i2c_driver ov2680_i2c_driver = { 984 .driver = { 985 .name = "ov2680", 986 .pm = &ov2680_pm_ops, 987 .of_match_table = ov2680_dt_ids, 988 }, 989 .probe = ov2680_probe, 990 .remove = ov2680_remove, 991 }; 992 module_i2c_driver(ov2680_i2c_driver); 993 994 MODULE_AUTHOR("Rui Miguel Silva <rui.silva@linaro.org>"); 995 MODULE_DESCRIPTION("OV2680 CMOS Image Sensor driver"); 996 MODULE_LICENSE("GPL v2"); 997