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 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 { 89 struct v4l2_ctrl *auto_exp; 90 struct v4l2_ctrl *exposure; 91 }; 92 struct { 93 struct v4l2_ctrl *auto_gain; 94 struct v4l2_ctrl *gain; 95 }; 96 97 struct v4l2_ctrl *hflip; 98 struct v4l2_ctrl *vflip; 99 struct v4l2_ctrl *test_pattern; 100 }; 101 102 struct ov2680_dev { 103 struct i2c_client *i2c_client; 104 struct v4l2_subdev sd; 105 106 struct media_pad pad; 107 struct clk *xvclk; 108 u32 xvclk_freq; 109 struct regulator_bulk_data supplies[OV2680_NUM_SUPPLIES]; 110 111 struct gpio_desc *reset_gpio; 112 struct mutex lock; /* protect members */ 113 114 bool mode_pending_changes; 115 bool is_enabled; 116 bool is_streaming; 117 118 struct ov2680_ctrls ctrls; 119 struct v4l2_mbus_framefmt fmt; 120 struct v4l2_fract frame_interval; 121 122 const struct ov2680_mode_info *current_mode; 123 }; 124 125 static const char * const test_pattern_menu[] = { 126 "Disabled", 127 "Color Bars", 128 "Random Data", 129 "Square", 130 "Black Image", 131 }; 132 133 static const int ov2680_hv_flip_bayer_order[] = { 134 MEDIA_BUS_FMT_SBGGR10_1X10, 135 MEDIA_BUS_FMT_SGRBG10_1X10, 136 MEDIA_BUS_FMT_SGBRG10_1X10, 137 MEDIA_BUS_FMT_SRGGB10_1X10, 138 }; 139 140 static const struct reg_value ov2680_setting_30fps_QUXGA_800_600[] = { 141 {0x3086, 0x01}, {0x370a, 0x23}, {0x3808, 0x03}, {0x3809, 0x20}, 142 {0x380a, 0x02}, {0x380b, 0x58}, {0x380c, 0x06}, {0x380d, 0xac}, 143 {0x380e, 0x02}, {0x380f, 0x84}, {0x3811, 0x04}, {0x3813, 0x04}, 144 {0x3814, 0x31}, {0x3815, 0x31}, {0x3820, 0xc0}, {0x4008, 0x00}, 145 {0x4009, 0x03}, {0x4837, 0x1e}, {0x3501, 0x4e}, {0x3502, 0xe0}, 146 }; 147 148 static const struct reg_value ov2680_setting_30fps_720P_1280_720[] = { 149 {0x3086, 0x00}, {0x3808, 0x05}, {0x3809, 0x00}, {0x380a, 0x02}, 150 {0x380b, 0xd0}, {0x380c, 0x06}, {0x380d, 0xa8}, {0x380e, 0x05}, 151 {0x380f, 0x0e}, {0x3811, 0x08}, {0x3813, 0x06}, {0x3814, 0x11}, 152 {0x3815, 0x11}, {0x3820, 0xc0}, {0x4008, 0x00}, 153 }; 154 155 static const struct reg_value ov2680_setting_30fps_UXGA_1600_1200[] = { 156 {0x3086, 0x00}, {0x3501, 0x4e}, {0x3502, 0xe0}, {0x3808, 0x06}, 157 {0x3809, 0x40}, {0x380a, 0x04}, {0x380b, 0xb0}, {0x380c, 0x06}, 158 {0x380d, 0xa8}, {0x380e, 0x05}, {0x380f, 0x0e}, {0x3811, 0x00}, 159 {0x3813, 0x00}, {0x3814, 0x11}, {0x3815, 0x11}, {0x3820, 0xc0}, 160 {0x4008, 0x00}, {0x4837, 0x18} 161 }; 162 163 static const struct ov2680_mode_info ov2680_mode_init_data = { 164 "mode_quxga_800_600", OV2680_MODE_QUXGA_800_600, 800, 600, 165 ov2680_setting_30fps_QUXGA_800_600, 166 ARRAY_SIZE(ov2680_setting_30fps_QUXGA_800_600), 167 }; 168 169 static const struct ov2680_mode_info ov2680_mode_data[OV2680_MODE_MAX] = { 170 {"mode_quxga_800_600", OV2680_MODE_QUXGA_800_600, 171 800, 600, ov2680_setting_30fps_QUXGA_800_600, 172 ARRAY_SIZE(ov2680_setting_30fps_QUXGA_800_600)}, 173 {"mode_720p_1280_720", OV2680_MODE_720P_1280_720, 174 1280, 720, ov2680_setting_30fps_720P_1280_720, 175 ARRAY_SIZE(ov2680_setting_30fps_720P_1280_720)}, 176 {"mode_uxga_1600_1200", OV2680_MODE_UXGA_1600_1200, 177 1600, 1200, ov2680_setting_30fps_UXGA_1600_1200, 178 ARRAY_SIZE(ov2680_setting_30fps_UXGA_1600_1200)}, 179 }; 180 181 static struct ov2680_dev *to_ov2680_dev(struct v4l2_subdev *sd) 182 { 183 return container_of(sd, struct ov2680_dev, sd); 184 } 185 186 static struct device *ov2680_to_dev(struct ov2680_dev *sensor) 187 { 188 return &sensor->i2c_client->dev; 189 } 190 191 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 192 { 193 return &container_of(ctrl->handler, struct ov2680_dev, 194 ctrls.handler)->sd; 195 } 196 197 static int __ov2680_write_reg(struct ov2680_dev *sensor, u16 reg, 198 unsigned int len, u32 val) 199 { 200 struct i2c_client *client = sensor->i2c_client; 201 u8 buf[6]; 202 int ret; 203 204 if (len > 4) 205 return -EINVAL; 206 207 put_unaligned_be16(reg, buf); 208 put_unaligned_be32(val << (8 * (4 - len)), buf + 2); 209 ret = i2c_master_send(client, buf, len + 2); 210 if (ret != len + 2) { 211 dev_err(&client->dev, "write error: reg=0x%4x: %d\n", reg, ret); 212 return -EIO; 213 } 214 215 return 0; 216 } 217 218 #define ov2680_write_reg(s, r, v) \ 219 __ov2680_write_reg(s, r, OV2680_REG_VALUE_8BIT, v) 220 221 #define ov2680_write_reg16(s, r, v) \ 222 __ov2680_write_reg(s, r, OV2680_REG_VALUE_16BIT, v) 223 224 #define ov2680_write_reg24(s, r, v) \ 225 __ov2680_write_reg(s, r, OV2680_REG_VALUE_24BIT, v) 226 227 static int __ov2680_read_reg(struct ov2680_dev *sensor, u16 reg, 228 unsigned int len, u32 *val) 229 { 230 struct i2c_client *client = sensor->i2c_client; 231 struct i2c_msg msgs[2]; 232 u8 addr_buf[2] = { reg >> 8, reg & 0xff }; 233 u8 data_buf[4] = { 0, }; 234 int ret; 235 236 if (len > 4) 237 return -EINVAL; 238 239 msgs[0].addr = client->addr; 240 msgs[0].flags = 0; 241 msgs[0].len = ARRAY_SIZE(addr_buf); 242 msgs[0].buf = addr_buf; 243 244 msgs[1].addr = client->addr; 245 msgs[1].flags = I2C_M_RD; 246 msgs[1].len = len; 247 msgs[1].buf = &data_buf[4 - len]; 248 249 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); 250 if (ret != ARRAY_SIZE(msgs)) { 251 dev_err(&client->dev, "read error: reg=0x%4x: %d\n", reg, ret); 252 return -EIO; 253 } 254 255 *val = get_unaligned_be32(data_buf); 256 257 return 0; 258 } 259 260 #define ov2680_read_reg(s, r, v) \ 261 __ov2680_read_reg(s, r, OV2680_REG_VALUE_8BIT, v) 262 263 #define ov2680_read_reg16(s, r, v) \ 264 __ov2680_read_reg(s, r, OV2680_REG_VALUE_16BIT, v) 265 266 #define ov2680_read_reg24(s, r, v) \ 267 __ov2680_read_reg(s, r, OV2680_REG_VALUE_24BIT, v) 268 269 static int ov2680_mod_reg(struct ov2680_dev *sensor, u16 reg, u8 mask, u8 val) 270 { 271 u32 readval; 272 int ret; 273 274 ret = ov2680_read_reg(sensor, reg, &readval); 275 if (ret < 0) 276 return ret; 277 278 readval &= ~mask; 279 val &= mask; 280 val |= readval; 281 282 return ov2680_write_reg(sensor, reg, val); 283 } 284 285 static int ov2680_load_regs(struct ov2680_dev *sensor, 286 const struct ov2680_mode_info *mode) 287 { 288 const struct reg_value *regs = mode->reg_data; 289 unsigned int i; 290 int ret = 0; 291 u16 reg_addr; 292 u8 val; 293 294 for (i = 0; i < mode->reg_data_size; ++i, ++regs) { 295 reg_addr = regs->reg_addr; 296 val = regs->val; 297 298 ret = ov2680_write_reg(sensor, reg_addr, val); 299 if (ret) 300 break; 301 } 302 303 return ret; 304 } 305 306 static void ov2680_power_up(struct ov2680_dev *sensor) 307 { 308 if (!sensor->reset_gpio) 309 return; 310 311 gpiod_set_value(sensor->reset_gpio, 0); 312 usleep_range(5000, 10000); 313 } 314 315 static void ov2680_power_down(struct ov2680_dev *sensor) 316 { 317 if (!sensor->reset_gpio) 318 return; 319 320 gpiod_set_value(sensor->reset_gpio, 1); 321 usleep_range(5000, 10000); 322 } 323 324 static int ov2680_bayer_order(struct ov2680_dev *sensor) 325 { 326 u32 format1; 327 u32 format2; 328 u32 hv_flip; 329 int ret; 330 331 ret = ov2680_read_reg(sensor, OV2680_REG_FORMAT1, &format1); 332 if (ret < 0) 333 return ret; 334 335 ret = ov2680_read_reg(sensor, OV2680_REG_FORMAT2, &format2); 336 if (ret < 0) 337 return ret; 338 339 hv_flip = (format2 & BIT(2) << 1) | (format1 & BIT(2)); 340 341 sensor->fmt.code = ov2680_hv_flip_bayer_order[hv_flip]; 342 343 return 0; 344 } 345 346 static int ov2680_vflip_enable(struct ov2680_dev *sensor) 347 { 348 int ret; 349 350 ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, BIT(2), BIT(2)); 351 if (ret < 0) 352 return ret; 353 354 return ov2680_bayer_order(sensor); 355 } 356 357 static int ov2680_vflip_disable(struct ov2680_dev *sensor) 358 { 359 int ret; 360 361 ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, BIT(2), BIT(0)); 362 if (ret < 0) 363 return ret; 364 365 return ov2680_bayer_order(sensor); 366 } 367 368 static int ov2680_hflip_enable(struct ov2680_dev *sensor) 369 { 370 int ret; 371 372 ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, BIT(2), BIT(2)); 373 if (ret < 0) 374 return ret; 375 376 return ov2680_bayer_order(sensor); 377 } 378 379 static int ov2680_hflip_disable(struct ov2680_dev *sensor) 380 { 381 int ret; 382 383 ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, BIT(2), BIT(0)); 384 if (ret < 0) 385 return ret; 386 387 return ov2680_bayer_order(sensor); 388 } 389 390 static int ov2680_test_pattern_set(struct ov2680_dev *sensor, int value) 391 { 392 int ret; 393 394 if (!value) 395 return ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, BIT(7), 0); 396 397 ret = ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, 0x03, value - 1); 398 if (ret < 0) 399 return ret; 400 401 ret = ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, BIT(7), BIT(7)); 402 if (ret < 0) 403 return ret; 404 405 return 0; 406 } 407 408 static int ov2680_gain_set(struct ov2680_dev *sensor, bool auto_gain) 409 { 410 struct ov2680_ctrls *ctrls = &sensor->ctrls; 411 u32 gain; 412 int ret; 413 414 ret = ov2680_mod_reg(sensor, OV2680_REG_R_MANUAL, BIT(1), 415 auto_gain ? 0 : BIT(1)); 416 if (ret < 0) 417 return ret; 418 419 if (auto_gain || !ctrls->gain->is_new) 420 return 0; 421 422 gain = ctrls->gain->val; 423 424 ret = ov2680_write_reg16(sensor, OV2680_REG_GAIN_PK, gain); 425 426 return 0; 427 } 428 429 static int ov2680_gain_get(struct ov2680_dev *sensor) 430 { 431 u32 gain; 432 int ret; 433 434 ret = ov2680_read_reg16(sensor, OV2680_REG_GAIN_PK, &gain); 435 if (ret) 436 return ret; 437 438 return gain; 439 } 440 441 static int ov2680_exposure_set(struct ov2680_dev *sensor, bool auto_exp) 442 { 443 struct ov2680_ctrls *ctrls = &sensor->ctrls; 444 u32 exp; 445 int ret; 446 447 ret = ov2680_mod_reg(sensor, OV2680_REG_R_MANUAL, BIT(0), 448 auto_exp ? 0 : BIT(0)); 449 if (ret < 0) 450 return ret; 451 452 if (auto_exp || !ctrls->exposure->is_new) 453 return 0; 454 455 exp = (u32)ctrls->exposure->val; 456 exp <<= 4; 457 458 return ov2680_write_reg24(sensor, OV2680_REG_EXPOSURE_PK_HIGH, exp); 459 } 460 461 static int ov2680_exposure_get(struct ov2680_dev *sensor) 462 { 463 int ret; 464 u32 exp; 465 466 ret = ov2680_read_reg24(sensor, OV2680_REG_EXPOSURE_PK_HIGH, &exp); 467 if (ret) 468 return ret; 469 470 return exp >> 4; 471 } 472 473 static int ov2680_stream_enable(struct ov2680_dev *sensor) 474 { 475 return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 1); 476 } 477 478 static int ov2680_stream_disable(struct ov2680_dev *sensor) 479 { 480 return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 0); 481 } 482 483 static int ov2680_mode_set(struct ov2680_dev *sensor) 484 { 485 struct ov2680_ctrls *ctrls = &sensor->ctrls; 486 int ret; 487 488 ret = ov2680_gain_set(sensor, false); 489 if (ret < 0) 490 return ret; 491 492 ret = ov2680_exposure_set(sensor, false); 493 if (ret < 0) 494 return ret; 495 496 ret = ov2680_load_regs(sensor, sensor->current_mode); 497 if (ret < 0) 498 return ret; 499 500 if (ctrls->auto_gain->val) { 501 ret = ov2680_gain_set(sensor, true); 502 if (ret < 0) 503 return ret; 504 } 505 506 if (ctrls->auto_exp->val == V4L2_EXPOSURE_AUTO) { 507 ret = ov2680_exposure_set(sensor, true); 508 if (ret < 0) 509 return ret; 510 } 511 512 sensor->mode_pending_changes = false; 513 514 return 0; 515 } 516 517 static int ov2680_mode_restore(struct ov2680_dev *sensor) 518 { 519 int ret; 520 521 ret = ov2680_load_regs(sensor, &ov2680_mode_init_data); 522 if (ret < 0) 523 return ret; 524 525 return ov2680_mode_set(sensor); 526 } 527 528 static int ov2680_power_off(struct ov2680_dev *sensor) 529 { 530 if (!sensor->is_enabled) 531 return 0; 532 533 clk_disable_unprepare(sensor->xvclk); 534 ov2680_power_down(sensor); 535 regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies); 536 sensor->is_enabled = false; 537 538 return 0; 539 } 540 541 static int ov2680_power_on(struct ov2680_dev *sensor) 542 { 543 struct device *dev = ov2680_to_dev(sensor); 544 int ret; 545 546 if (sensor->is_enabled) 547 return 0; 548 549 ret = regulator_bulk_enable(OV2680_NUM_SUPPLIES, sensor->supplies); 550 if (ret < 0) { 551 dev_err(dev, "failed to enable regulators: %d\n", ret); 552 return ret; 553 } 554 555 if (!sensor->reset_gpio) { 556 ret = ov2680_write_reg(sensor, OV2680_REG_SOFT_RESET, 0x01); 557 if (ret != 0) { 558 dev_err(dev, "sensor soft reset failed\n"); 559 return ret; 560 } 561 usleep_range(1000, 2000); 562 } else { 563 ov2680_power_down(sensor); 564 ov2680_power_up(sensor); 565 } 566 567 ret = clk_prepare_enable(sensor->xvclk); 568 if (ret < 0) 569 return ret; 570 571 sensor->is_enabled = true; 572 573 /* Set clock lane into LP-11 state */ 574 ov2680_stream_enable(sensor); 575 usleep_range(1000, 2000); 576 ov2680_stream_disable(sensor); 577 578 return 0; 579 } 580 581 static int ov2680_s_power(struct v4l2_subdev *sd, int on) 582 { 583 struct ov2680_dev *sensor = to_ov2680_dev(sd); 584 int ret = 0; 585 586 mutex_lock(&sensor->lock); 587 588 if (on) 589 ret = ov2680_power_on(sensor); 590 else 591 ret = ov2680_power_off(sensor); 592 593 mutex_unlock(&sensor->lock); 594 595 if (on && ret == 0) { 596 ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler); 597 if (ret < 0) 598 return ret; 599 600 ret = ov2680_mode_restore(sensor); 601 } 602 603 return ret; 604 } 605 606 static int ov2680_s_g_frame_interval(struct v4l2_subdev *sd, 607 struct v4l2_subdev_frame_interval *fi) 608 { 609 struct ov2680_dev *sensor = to_ov2680_dev(sd); 610 611 mutex_lock(&sensor->lock); 612 fi->interval = sensor->frame_interval; 613 mutex_unlock(&sensor->lock); 614 615 return 0; 616 } 617 618 static int ov2680_s_stream(struct v4l2_subdev *sd, int enable) 619 { 620 struct ov2680_dev *sensor = to_ov2680_dev(sd); 621 int ret = 0; 622 623 mutex_lock(&sensor->lock); 624 625 if (sensor->is_streaming == !!enable) 626 goto unlock; 627 628 if (enable && sensor->mode_pending_changes) { 629 ret = ov2680_mode_set(sensor); 630 if (ret < 0) 631 goto unlock; 632 } 633 634 if (enable) 635 ret = ov2680_stream_enable(sensor); 636 else 637 ret = ov2680_stream_disable(sensor); 638 639 sensor->is_streaming = !!enable; 640 641 unlock: 642 mutex_unlock(&sensor->lock); 643 644 return ret; 645 } 646 647 static int ov2680_enum_mbus_code(struct v4l2_subdev *sd, 648 struct v4l2_subdev_state *sd_state, 649 struct v4l2_subdev_mbus_code_enum *code) 650 { 651 struct ov2680_dev *sensor = to_ov2680_dev(sd); 652 653 if (code->pad != 0 || code->index != 0) 654 return -EINVAL; 655 656 code->code = sensor->fmt.code; 657 658 return 0; 659 } 660 661 static int ov2680_get_fmt(struct v4l2_subdev *sd, 662 struct v4l2_subdev_state *sd_state, 663 struct v4l2_subdev_format *format) 664 { 665 struct ov2680_dev *sensor = to_ov2680_dev(sd); 666 struct v4l2_mbus_framefmt *fmt = NULL; 667 int ret = 0; 668 669 if (format->pad != 0) 670 return -EINVAL; 671 672 mutex_lock(&sensor->lock); 673 674 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 675 #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API 676 fmt = v4l2_subdev_get_try_format(&sensor->sd, sd_state, 677 format->pad); 678 #else 679 ret = -EINVAL; 680 #endif 681 } else { 682 fmt = &sensor->fmt; 683 } 684 685 if (fmt) 686 format->format = *fmt; 687 688 mutex_unlock(&sensor->lock); 689 690 return ret; 691 } 692 693 static int ov2680_set_fmt(struct v4l2_subdev *sd, 694 struct v4l2_subdev_state *sd_state, 695 struct v4l2_subdev_format *format) 696 { 697 struct ov2680_dev *sensor = to_ov2680_dev(sd); 698 struct v4l2_mbus_framefmt *fmt = &format->format; 699 #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API 700 struct v4l2_mbus_framefmt *try_fmt; 701 #endif 702 const struct ov2680_mode_info *mode; 703 int ret = 0; 704 705 if (format->pad != 0) 706 return -EINVAL; 707 708 mutex_lock(&sensor->lock); 709 710 if (sensor->is_streaming) { 711 ret = -EBUSY; 712 goto unlock; 713 } 714 715 mode = v4l2_find_nearest_size(ov2680_mode_data, 716 ARRAY_SIZE(ov2680_mode_data), width, 717 height, fmt->width, fmt->height); 718 if (!mode) { 719 ret = -EINVAL; 720 goto unlock; 721 } 722 723 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 724 #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API 725 try_fmt = v4l2_subdev_get_try_format(sd, sd_state, 0); 726 format->format = *try_fmt; 727 #endif 728 goto unlock; 729 } 730 731 fmt->width = mode->width; 732 fmt->height = mode->height; 733 fmt->code = sensor->fmt.code; 734 fmt->colorspace = sensor->fmt.colorspace; 735 736 sensor->current_mode = mode; 737 sensor->fmt = format->format; 738 sensor->mode_pending_changes = true; 739 740 unlock: 741 mutex_unlock(&sensor->lock); 742 743 return ret; 744 } 745 746 static int ov2680_init_cfg(struct v4l2_subdev *sd, 747 struct v4l2_subdev_state *sd_state) 748 { 749 struct v4l2_subdev_format fmt = { 750 .which = sd_state ? V4L2_SUBDEV_FORMAT_TRY 751 : V4L2_SUBDEV_FORMAT_ACTIVE, 752 .format = { 753 .width = 800, 754 .height = 600, 755 } 756 }; 757 758 return ov2680_set_fmt(sd, sd_state, &fmt); 759 } 760 761 static int ov2680_enum_frame_size(struct v4l2_subdev *sd, 762 struct v4l2_subdev_state *sd_state, 763 struct v4l2_subdev_frame_size_enum *fse) 764 { 765 int index = fse->index; 766 767 if (index >= OV2680_MODE_MAX || index < 0) 768 return -EINVAL; 769 770 fse->min_width = ov2680_mode_data[index].width; 771 fse->min_height = ov2680_mode_data[index].height; 772 fse->max_width = ov2680_mode_data[index].width; 773 fse->max_height = ov2680_mode_data[index].height; 774 775 return 0; 776 } 777 778 static int ov2680_enum_frame_interval(struct v4l2_subdev *sd, 779 struct v4l2_subdev_state *sd_state, 780 struct v4l2_subdev_frame_interval_enum *fie) 781 { 782 struct v4l2_fract tpf; 783 784 if (fie->index >= OV2680_MODE_MAX || fie->width > OV2680_WIDTH_MAX || 785 fie->height > OV2680_HEIGHT_MAX || 786 fie->which > V4L2_SUBDEV_FORMAT_ACTIVE) 787 return -EINVAL; 788 789 tpf.denominator = OV2680_FRAME_RATE; 790 tpf.numerator = 1; 791 792 fie->interval = tpf; 793 794 return 0; 795 } 796 797 static int ov2680_g_volatile_ctrl(struct v4l2_ctrl *ctrl) 798 { 799 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 800 struct ov2680_dev *sensor = to_ov2680_dev(sd); 801 struct ov2680_ctrls *ctrls = &sensor->ctrls; 802 int val; 803 804 if (!sensor->is_enabled) 805 return 0; 806 807 switch (ctrl->id) { 808 case V4L2_CID_GAIN: 809 val = ov2680_gain_get(sensor); 810 if (val < 0) 811 return val; 812 ctrls->gain->val = val; 813 break; 814 case V4L2_CID_EXPOSURE: 815 val = ov2680_exposure_get(sensor); 816 if (val < 0) 817 return val; 818 ctrls->exposure->val = val; 819 break; 820 } 821 822 return 0; 823 } 824 825 static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl) 826 { 827 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 828 struct ov2680_dev *sensor = to_ov2680_dev(sd); 829 struct ov2680_ctrls *ctrls = &sensor->ctrls; 830 831 if (!sensor->is_enabled) 832 return 0; 833 834 switch (ctrl->id) { 835 case V4L2_CID_AUTOGAIN: 836 return ov2680_gain_set(sensor, !!ctrl->val); 837 case V4L2_CID_GAIN: 838 return ov2680_gain_set(sensor, !!ctrls->auto_gain->val); 839 case V4L2_CID_EXPOSURE_AUTO: 840 return ov2680_exposure_set(sensor, !!ctrl->val); 841 case V4L2_CID_EXPOSURE: 842 return ov2680_exposure_set(sensor, !!ctrls->auto_exp->val); 843 case V4L2_CID_VFLIP: 844 if (sensor->is_streaming) 845 return -EBUSY; 846 if (ctrl->val) 847 return ov2680_vflip_enable(sensor); 848 else 849 return ov2680_vflip_disable(sensor); 850 case V4L2_CID_HFLIP: 851 if (sensor->is_streaming) 852 return -EBUSY; 853 if (ctrl->val) 854 return ov2680_hflip_enable(sensor); 855 else 856 return ov2680_hflip_disable(sensor); 857 case V4L2_CID_TEST_PATTERN: 858 return ov2680_test_pattern_set(sensor, ctrl->val); 859 default: 860 break; 861 } 862 863 return -EINVAL; 864 } 865 866 static const struct v4l2_ctrl_ops ov2680_ctrl_ops = { 867 .g_volatile_ctrl = ov2680_g_volatile_ctrl, 868 .s_ctrl = ov2680_s_ctrl, 869 }; 870 871 static const struct v4l2_subdev_core_ops ov2680_core_ops = { 872 .s_power = ov2680_s_power, 873 }; 874 875 static const struct v4l2_subdev_video_ops ov2680_video_ops = { 876 .g_frame_interval = ov2680_s_g_frame_interval, 877 .s_frame_interval = ov2680_s_g_frame_interval, 878 .s_stream = ov2680_s_stream, 879 }; 880 881 static const struct v4l2_subdev_pad_ops ov2680_pad_ops = { 882 .init_cfg = ov2680_init_cfg, 883 .enum_mbus_code = ov2680_enum_mbus_code, 884 .get_fmt = ov2680_get_fmt, 885 .set_fmt = ov2680_set_fmt, 886 .enum_frame_size = ov2680_enum_frame_size, 887 .enum_frame_interval = ov2680_enum_frame_interval, 888 }; 889 890 static const struct v4l2_subdev_ops ov2680_subdev_ops = { 891 .core = &ov2680_core_ops, 892 .video = &ov2680_video_ops, 893 .pad = &ov2680_pad_ops, 894 }; 895 896 static int ov2680_mode_init(struct ov2680_dev *sensor) 897 { 898 const struct ov2680_mode_info *init_mode; 899 900 /* set initial mode */ 901 sensor->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10; 902 sensor->fmt.width = 800; 903 sensor->fmt.height = 600; 904 sensor->fmt.field = V4L2_FIELD_NONE; 905 sensor->fmt.colorspace = V4L2_COLORSPACE_SRGB; 906 907 sensor->frame_interval.denominator = OV2680_FRAME_RATE; 908 sensor->frame_interval.numerator = 1; 909 910 init_mode = &ov2680_mode_init_data; 911 912 sensor->current_mode = init_mode; 913 914 sensor->mode_pending_changes = true; 915 916 return 0; 917 } 918 919 static int ov2680_v4l2_register(struct ov2680_dev *sensor) 920 { 921 const struct v4l2_ctrl_ops *ops = &ov2680_ctrl_ops; 922 struct ov2680_ctrls *ctrls = &sensor->ctrls; 923 struct v4l2_ctrl_handler *hdl = &ctrls->handler; 924 int ret = 0; 925 926 v4l2_i2c_subdev_init(&sensor->sd, sensor->i2c_client, 927 &ov2680_subdev_ops); 928 929 #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API 930 sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; 931 #endif 932 sensor->pad.flags = MEDIA_PAD_FL_SOURCE; 933 sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 934 935 ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad); 936 if (ret < 0) 937 return ret; 938 939 v4l2_ctrl_handler_init(hdl, 7); 940 941 hdl->lock = &sensor->lock; 942 943 ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0); 944 ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0); 945 946 ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, 947 &ov2680_ctrl_ops, V4L2_CID_TEST_PATTERN, 948 ARRAY_SIZE(test_pattern_menu) - 1, 949 0, 0, test_pattern_menu); 950 951 ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops, 952 V4L2_CID_EXPOSURE_AUTO, 953 V4L2_EXPOSURE_MANUAL, 0, 954 V4L2_EXPOSURE_AUTO); 955 956 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, 957 0, 32767, 1, 0); 958 959 ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN, 960 0, 1, 1, 1); 961 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 2047, 1, 0); 962 963 if (hdl->error) { 964 ret = hdl->error; 965 goto cleanup_entity; 966 } 967 968 ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE; 969 ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE; 970 ctrls->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; 971 ctrls->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; 972 973 v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true); 974 v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true); 975 976 sensor->sd.ctrl_handler = hdl; 977 978 ret = v4l2_async_register_subdev(&sensor->sd); 979 if (ret < 0) 980 goto cleanup_entity; 981 982 return 0; 983 984 cleanup_entity: 985 media_entity_cleanup(&sensor->sd.entity); 986 v4l2_ctrl_handler_free(hdl); 987 988 return ret; 989 } 990 991 static int ov2680_get_regulators(struct ov2680_dev *sensor) 992 { 993 int i; 994 995 for (i = 0; i < OV2680_NUM_SUPPLIES; i++) 996 sensor->supplies[i].supply = ov2680_supply_name[i]; 997 998 return devm_regulator_bulk_get(&sensor->i2c_client->dev, 999 OV2680_NUM_SUPPLIES, 1000 sensor->supplies); 1001 } 1002 1003 static int ov2680_check_id(struct ov2680_dev *sensor) 1004 { 1005 struct device *dev = ov2680_to_dev(sensor); 1006 u32 chip_id; 1007 int ret; 1008 1009 ov2680_power_on(sensor); 1010 1011 ret = ov2680_read_reg16(sensor, OV2680_REG_CHIP_ID_HIGH, &chip_id); 1012 if (ret < 0) { 1013 dev_err(dev, "failed to read chip id high\n"); 1014 return -ENODEV; 1015 } 1016 1017 if (chip_id != OV2680_CHIP_ID) { 1018 dev_err(dev, "chip id: 0x%04x does not match expected 0x%04x\n", 1019 chip_id, OV2680_CHIP_ID); 1020 return -ENODEV; 1021 } 1022 1023 return 0; 1024 } 1025 1026 static int ov2680_parse_dt(struct ov2680_dev *sensor) 1027 { 1028 struct device *dev = ov2680_to_dev(sensor); 1029 int ret; 1030 1031 sensor->reset_gpio = devm_gpiod_get_optional(dev, "reset", 1032 GPIOD_OUT_HIGH); 1033 ret = PTR_ERR_OR_ZERO(sensor->reset_gpio); 1034 if (ret < 0) { 1035 dev_dbg(dev, "error while getting reset gpio: %d\n", ret); 1036 return ret; 1037 } 1038 1039 sensor->xvclk = devm_clk_get(dev, "xvclk"); 1040 if (IS_ERR(sensor->xvclk)) { 1041 dev_err(dev, "xvclk clock missing or invalid\n"); 1042 return PTR_ERR(sensor->xvclk); 1043 } 1044 1045 sensor->xvclk_freq = clk_get_rate(sensor->xvclk); 1046 if (sensor->xvclk_freq != OV2680_XVCLK_VALUE) { 1047 dev_err(dev, "wrong xvclk frequency %d HZ, expected: %d Hz\n", 1048 sensor->xvclk_freq, OV2680_XVCLK_VALUE); 1049 return -EINVAL; 1050 } 1051 1052 return 0; 1053 } 1054 1055 static int ov2680_probe(struct i2c_client *client) 1056 { 1057 struct device *dev = &client->dev; 1058 struct ov2680_dev *sensor; 1059 int ret; 1060 1061 sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); 1062 if (!sensor) 1063 return -ENOMEM; 1064 1065 sensor->i2c_client = client; 1066 1067 ret = ov2680_parse_dt(sensor); 1068 if (ret < 0) 1069 return -EINVAL; 1070 1071 ret = ov2680_mode_init(sensor); 1072 if (ret < 0) 1073 return ret; 1074 1075 ret = ov2680_get_regulators(sensor); 1076 if (ret < 0) { 1077 dev_err(dev, "failed to get regulators\n"); 1078 return ret; 1079 } 1080 1081 mutex_init(&sensor->lock); 1082 1083 ret = ov2680_check_id(sensor); 1084 if (ret < 0) 1085 goto lock_destroy; 1086 1087 ret = ov2680_v4l2_register(sensor); 1088 if (ret < 0) 1089 goto lock_destroy; 1090 1091 dev_info(dev, "ov2680 init correctly\n"); 1092 1093 return 0; 1094 1095 lock_destroy: 1096 dev_err(dev, "ov2680 init fail: %d\n", ret); 1097 mutex_destroy(&sensor->lock); 1098 1099 return ret; 1100 } 1101 1102 static void ov2680_remove(struct i2c_client *client) 1103 { 1104 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1105 struct ov2680_dev *sensor = to_ov2680_dev(sd); 1106 1107 v4l2_async_unregister_subdev(&sensor->sd); 1108 mutex_destroy(&sensor->lock); 1109 media_entity_cleanup(&sensor->sd.entity); 1110 v4l2_ctrl_handler_free(&sensor->ctrls.handler); 1111 } 1112 1113 static int __maybe_unused ov2680_suspend(struct device *dev) 1114 { 1115 struct v4l2_subdev *sd = dev_get_drvdata(dev); 1116 struct ov2680_dev *sensor = to_ov2680_dev(sd); 1117 1118 if (sensor->is_streaming) 1119 ov2680_stream_disable(sensor); 1120 1121 return 0; 1122 } 1123 1124 static int __maybe_unused ov2680_resume(struct device *dev) 1125 { 1126 struct v4l2_subdev *sd = dev_get_drvdata(dev); 1127 struct ov2680_dev *sensor = to_ov2680_dev(sd); 1128 int ret; 1129 1130 if (sensor->is_streaming) { 1131 ret = ov2680_stream_enable(sensor); 1132 if (ret < 0) 1133 goto stream_disable; 1134 } 1135 1136 return 0; 1137 1138 stream_disable: 1139 ov2680_stream_disable(sensor); 1140 sensor->is_streaming = false; 1141 1142 return ret; 1143 } 1144 1145 static const struct dev_pm_ops ov2680_pm_ops = { 1146 SET_SYSTEM_SLEEP_PM_OPS(ov2680_suspend, ov2680_resume) 1147 }; 1148 1149 static const struct of_device_id ov2680_dt_ids[] = { 1150 { .compatible = "ovti,ov2680" }, 1151 { /* sentinel */ }, 1152 }; 1153 MODULE_DEVICE_TABLE(of, ov2680_dt_ids); 1154 1155 static struct i2c_driver ov2680_i2c_driver = { 1156 .driver = { 1157 .name = "ov2680", 1158 .pm = &ov2680_pm_ops, 1159 .of_match_table = of_match_ptr(ov2680_dt_ids), 1160 }, 1161 .probe_new = ov2680_probe, 1162 .remove = ov2680_remove, 1163 }; 1164 module_i2c_driver(ov2680_i2c_driver); 1165 1166 MODULE_AUTHOR("Rui Miguel Silva <rui.silva@linaro.org>"); 1167 MODULE_DESCRIPTION("OV2680 CMOS Image Sensor driver"); 1168 MODULE_LICENSE("GPL v2"); 1169