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 <linux/clk.h> 14 #include <linux/delay.h> 15 #include <linux/err.h> 16 #include <linux/gpio/consumer.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/pm_runtime.h> 22 #include <linux/regmap.h> 23 #include <linux/regulator/consumer.h> 24 25 #include <media/v4l2-cci.h> 26 #include <media/v4l2-common.h> 27 #include <media/v4l2-ctrls.h> 28 #include <media/v4l2-fwnode.h> 29 #include <media/v4l2-subdev.h> 30 31 #define OV2680_CHIP_ID 0x2680 32 33 #define OV2680_REG_STREAM_CTRL CCI_REG8(0x0100) 34 #define OV2680_REG_SOFT_RESET CCI_REG8(0x0103) 35 36 #define OV2680_REG_CHIP_ID CCI_REG16(0x300a) 37 #define OV2680_REG_SC_CMMN_SUB_ID CCI_REG8(0x302a) 38 #define OV2680_REG_PLL_MULTIPLIER CCI_REG16(0x3081) 39 40 #define OV2680_REG_EXPOSURE_PK CCI_REG24(0x3500) 41 #define OV2680_REG_R_MANUAL CCI_REG8(0x3503) 42 #define OV2680_REG_GAIN_PK CCI_REG16(0x350a) 43 44 #define OV2680_REG_SENSOR_CTRL_0A CCI_REG8(0x370a) 45 46 #define OV2680_REG_HORIZONTAL_START CCI_REG16(0x3800) 47 #define OV2680_REG_VERTICAL_START CCI_REG16(0x3802) 48 #define OV2680_REG_HORIZONTAL_END CCI_REG16(0x3804) 49 #define OV2680_REG_VERTICAL_END CCI_REG16(0x3806) 50 #define OV2680_REG_HORIZONTAL_OUTPUT_SIZE CCI_REG16(0x3808) 51 #define OV2680_REG_VERTICAL_OUTPUT_SIZE CCI_REG16(0x380a) 52 #define OV2680_REG_TIMING_HTS CCI_REG16(0x380c) 53 #define OV2680_REG_TIMING_VTS CCI_REG16(0x380e) 54 #define OV2680_REG_ISP_X_WIN CCI_REG16(0x3810) 55 #define OV2680_REG_ISP_Y_WIN CCI_REG16(0x3812) 56 #define OV2680_REG_X_INC CCI_REG8(0x3814) 57 #define OV2680_REG_Y_INC CCI_REG8(0x3815) 58 #define OV2680_REG_FORMAT1 CCI_REG8(0x3820) 59 #define OV2680_REG_FORMAT2 CCI_REG8(0x3821) 60 61 #define OV2680_REG_ISP_CTRL00 CCI_REG8(0x5080) 62 63 #define OV2680_REG_X_WIN CCI_REG16(0x5704) 64 #define OV2680_REG_Y_WIN CCI_REG16(0x5706) 65 66 #define OV2680_FRAME_RATE 30 67 68 #define OV2680_NATIVE_WIDTH 1616 69 #define OV2680_NATIVE_HEIGHT 1216 70 #define OV2680_NATIVE_START_LEFT 0 71 #define OV2680_NATIVE_START_TOP 0 72 #define OV2680_ACTIVE_WIDTH 1600 73 #define OV2680_ACTIVE_HEIGHT 1200 74 #define OV2680_ACTIVE_START_LEFT 8 75 #define OV2680_ACTIVE_START_TOP 8 76 #define OV2680_MIN_CROP_WIDTH 2 77 #define OV2680_MIN_CROP_HEIGHT 2 78 #define OV2680_MIN_VBLANK 4 79 #define OV2680_MAX_VBLANK 0xffff 80 81 /* Fixed pre-div of 1/2 */ 82 #define OV2680_PLL_PREDIV0 2 83 84 /* Pre-div configurable through reg 0x3080, left at its default of 0x02 : 1/2 */ 85 #define OV2680_PLL_PREDIV 2 86 87 /* 66MHz pixel clock: 66MHz / 1704 * 1294 = 30fps */ 88 #define OV2680_PIXELS_PER_LINE 1704 89 #define OV2680_LINES_PER_FRAME_30FPS 1294 90 91 /* Max exposure time is VTS - 8 */ 92 #define OV2680_INTEGRATION_TIME_MARGIN 8 93 94 #define OV2680_DEFAULT_WIDTH 800 95 #define OV2680_DEFAULT_HEIGHT 600 96 97 /* For enum_frame_size() full-size + binned-/quarter-size */ 98 #define OV2680_FRAME_SIZES 2 99 100 static const char * const ov2680_supply_name[] = { 101 "DOVDD", 102 "DVDD", 103 "AVDD", 104 }; 105 106 #define OV2680_NUM_SUPPLIES ARRAY_SIZE(ov2680_supply_name) 107 108 enum { 109 OV2680_19_2_MHZ, 110 OV2680_24_MHZ, 111 }; 112 113 static const unsigned long ov2680_xvclk_freqs[] = { 114 [OV2680_19_2_MHZ] = 19200000, 115 [OV2680_24_MHZ] = 24000000, 116 }; 117 118 static const u8 ov2680_pll_multipliers[] = { 119 [OV2680_19_2_MHZ] = 69, 120 [OV2680_24_MHZ] = 55, 121 }; 122 123 struct ov2680_ctrls { 124 struct v4l2_ctrl_handler handler; 125 struct v4l2_ctrl *exposure; 126 struct v4l2_ctrl *gain; 127 struct v4l2_ctrl *hflip; 128 struct v4l2_ctrl *vflip; 129 struct v4l2_ctrl *test_pattern; 130 struct v4l2_ctrl *link_freq; 131 struct v4l2_ctrl *pixel_rate; 132 struct v4l2_ctrl *vblank; 133 struct v4l2_ctrl *hblank; 134 }; 135 136 struct ov2680_mode { 137 struct v4l2_rect crop; 138 struct v4l2_mbus_framefmt fmt; 139 struct v4l2_fract frame_interval; 140 bool binning; 141 u16 h_start; 142 u16 v_start; 143 u16 h_end; 144 u16 v_end; 145 u16 h_output_size; 146 u16 v_output_size; 147 }; 148 149 struct ov2680_dev { 150 struct device *dev; 151 struct regmap *regmap; 152 struct v4l2_subdev sd; 153 154 struct media_pad pad; 155 struct clk *xvclk; 156 u32 xvclk_freq; 157 u8 pll_mult; 158 s64 link_freq[1]; 159 u64 pixel_rate; 160 struct regulator_bulk_data supplies[OV2680_NUM_SUPPLIES]; 161 162 struct gpio_desc *pwdn_gpio; 163 struct mutex lock; /* protect members */ 164 165 bool is_streaming; 166 167 struct ov2680_ctrls ctrls; 168 struct ov2680_mode mode; 169 }; 170 171 static const struct v4l2_rect ov2680_default_crop = { 172 .left = OV2680_ACTIVE_START_LEFT, 173 .top = OV2680_ACTIVE_START_TOP, 174 .width = OV2680_ACTIVE_WIDTH, 175 .height = OV2680_ACTIVE_HEIGHT, 176 }; 177 178 static const char * const test_pattern_menu[] = { 179 "Disabled", 180 "Color Bars", 181 "Random Data", 182 "Square", 183 "Black Image", 184 }; 185 186 static const int ov2680_hv_flip_bayer_order[] = { 187 MEDIA_BUS_FMT_SBGGR10_1X10, 188 MEDIA_BUS_FMT_SGRBG10_1X10, 189 MEDIA_BUS_FMT_SGBRG10_1X10, 190 MEDIA_BUS_FMT_SRGGB10_1X10, 191 }; 192 193 static const struct reg_sequence ov2680_global_setting[] = { 194 /* MIPI PHY, 0x10 -> 0x1c enable bp_c_hs_en_lat and bp_d_hs_en_lat */ 195 {0x3016, 0x1c}, 196 197 /* R MANUAL set exposure and gain to manual (hw does not do auto) */ 198 {0x3503, 0x03}, 199 200 /* Analog control register tweaks */ 201 {0x3603, 0x39}, /* Reset value 0x99 */ 202 {0x3604, 0x24}, /* Reset value 0x74 */ 203 {0x3621, 0x37}, /* Reset value 0x44 */ 204 205 /* Sensor control register tweaks */ 206 {0x3701, 0x64}, /* Reset value 0x61 */ 207 {0x3705, 0x3c}, /* Reset value 0x21 */ 208 {0x370c, 0x50}, /* Reset value 0x10 */ 209 {0x370d, 0xc0}, /* Reset value 0x00 */ 210 {0x3718, 0x88}, /* Reset value 0x80 */ 211 212 /* PSRAM tweaks */ 213 {0x3781, 0x80}, /* Reset value 0x00 */ 214 {0x3784, 0x0c}, /* Reset value 0x00, based on OV2680_R1A_AM10.ovt */ 215 {0x3789, 0x60}, /* Reset value 0x50 */ 216 217 /* BLC CTRL00 0x01 -> 0x81 set avg_weight to 8 */ 218 {0x4000, 0x81}, 219 220 /* Set black level compensation range to 0 - 3 (default 0 - 11) */ 221 {0x4008, 0x00}, 222 {0x4009, 0x03}, 223 224 /* VFIFO R2 0x00 -> 0x02 set Frame reset enable */ 225 {0x4602, 0x02}, 226 227 /* MIPI ctrl CLK PREPARE MIN change from 0x26 (38) -> 0x36 (54) */ 228 {0x481f, 0x36}, 229 230 /* MIPI ctrl CLK LPX P MIN change from 0x32 (50) -> 0x36 (54) */ 231 {0x4825, 0x36}, 232 233 /* R ISP CTRL2 0x20 -> 0x30, set sof_sel bit */ 234 {0x5002, 0x30}, 235 236 /* 237 * Window CONTROL 0x00 -> 0x01, enable manual window control, 238 * this is necessary for full size flip and mirror support. 239 */ 240 {0x5708, 0x01}, 241 242 /* 243 * DPC CTRL0 0x14 -> 0x3e, set enable_tail, enable_3x3_cluster 244 * and enable_general_tail bits based OV2680_R1A_AM10.ovt. 245 */ 246 {0x5780, 0x3e}, 247 248 /* DPC MORE CONNECTION CASE THRE 0x0c (12) -> 0x02 (2) */ 249 {0x5788, 0x02}, 250 251 /* DPC GAIN LIST1 0x0f (15) -> 0x08 (8) */ 252 {0x578e, 0x08}, 253 254 /* DPC GAIN LIST2 0x3f (63) -> 0x0c (12) */ 255 {0x578f, 0x0c}, 256 257 /* DPC THRE RATIO 0x04 (4) -> 0x00 (0) */ 258 {0x5792, 0x00}, 259 }; 260 261 static struct ov2680_dev *to_ov2680_dev(struct v4l2_subdev *sd) 262 { 263 return container_of(sd, struct ov2680_dev, sd); 264 } 265 266 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 267 { 268 return &container_of(ctrl->handler, struct ov2680_dev, 269 ctrls.handler)->sd; 270 } 271 272 static void ov2680_power_up(struct ov2680_dev *sensor) 273 { 274 if (!sensor->pwdn_gpio) 275 return; 276 277 gpiod_set_value(sensor->pwdn_gpio, 0); 278 usleep_range(5000, 10000); 279 } 280 281 static void ov2680_power_down(struct ov2680_dev *sensor) 282 { 283 if (!sensor->pwdn_gpio) 284 return; 285 286 gpiod_set_value(sensor->pwdn_gpio, 1); 287 usleep_range(5000, 10000); 288 } 289 290 static void ov2680_set_bayer_order(struct ov2680_dev *sensor, 291 struct v4l2_mbus_framefmt *fmt) 292 { 293 int hv_flip = 0; 294 295 if (sensor->ctrls.vflip && sensor->ctrls.vflip->val) 296 hv_flip += 1; 297 298 if (sensor->ctrls.hflip && sensor->ctrls.hflip->val) 299 hv_flip += 2; 300 301 fmt->code = ov2680_hv_flip_bayer_order[hv_flip]; 302 } 303 304 static struct v4l2_mbus_framefmt * 305 __ov2680_get_pad_format(struct ov2680_dev *sensor, 306 struct v4l2_subdev_state *state, 307 unsigned int pad, 308 enum v4l2_subdev_format_whence which) 309 { 310 if (which == V4L2_SUBDEV_FORMAT_TRY) 311 return v4l2_subdev_state_get_format(state, pad); 312 313 return &sensor->mode.fmt; 314 } 315 316 static struct v4l2_rect * 317 __ov2680_get_pad_crop(struct ov2680_dev *sensor, 318 struct v4l2_subdev_state *state, 319 unsigned int pad, 320 enum v4l2_subdev_format_whence which) 321 { 322 if (which == V4L2_SUBDEV_FORMAT_TRY) 323 return v4l2_subdev_state_get_crop(state, pad); 324 325 return &sensor->mode.crop; 326 } 327 328 static void ov2680_fill_format(struct ov2680_dev *sensor, 329 struct v4l2_mbus_framefmt *fmt, 330 unsigned int width, unsigned int height) 331 { 332 memset(fmt, 0, sizeof(*fmt)); 333 fmt->width = width; 334 fmt->height = height; 335 fmt->field = V4L2_FIELD_NONE; 336 fmt->colorspace = V4L2_COLORSPACE_SRGB; 337 ov2680_set_bayer_order(sensor, fmt); 338 } 339 340 static void ov2680_calc_mode(struct ov2680_dev *sensor) 341 { 342 int width = sensor->mode.fmt.width; 343 int height = sensor->mode.fmt.height; 344 int orig_width = width; 345 int orig_height = height; 346 347 if (width <= (sensor->mode.crop.width / 2) && 348 height <= (sensor->mode.crop.height / 2)) { 349 sensor->mode.binning = true; 350 width *= 2; 351 height *= 2; 352 } else { 353 sensor->mode.binning = false; 354 } 355 356 sensor->mode.h_start = (sensor->mode.crop.left + 357 (sensor->mode.crop.width - width) / 2) & ~1; 358 sensor->mode.v_start = (sensor->mode.crop.top + 359 (sensor->mode.crop.height - height) / 2) & ~1; 360 sensor->mode.h_end = 361 min(sensor->mode.h_start + width - 1, OV2680_NATIVE_WIDTH - 1); 362 sensor->mode.v_end = 363 min(sensor->mode.v_start + height - 1, OV2680_NATIVE_HEIGHT - 1); 364 sensor->mode.h_output_size = orig_width; 365 sensor->mode.v_output_size = orig_height; 366 } 367 368 static int ov2680_set_mode(struct ov2680_dev *sensor) 369 { 370 u8 sensor_ctrl_0a, inc, fmt1, fmt2; 371 int ret = 0; 372 373 if (sensor->mode.binning) { 374 sensor_ctrl_0a = 0x23; 375 inc = 0x31; 376 fmt1 = 0xc2; 377 fmt2 = 0x01; 378 } else { 379 sensor_ctrl_0a = 0x21; 380 inc = 0x11; 381 fmt1 = 0xc0; 382 fmt2 = 0x00; 383 } 384 385 cci_write(sensor->regmap, OV2680_REG_SENSOR_CTRL_0A, 386 sensor_ctrl_0a, &ret); 387 cci_write(sensor->regmap, OV2680_REG_HORIZONTAL_START, 388 sensor->mode.h_start, &ret); 389 cci_write(sensor->regmap, OV2680_REG_VERTICAL_START, 390 sensor->mode.v_start, &ret); 391 cci_write(sensor->regmap, OV2680_REG_HORIZONTAL_END, 392 sensor->mode.h_end, &ret); 393 cci_write(sensor->regmap, OV2680_REG_VERTICAL_END, 394 sensor->mode.v_end, &ret); 395 cci_write(sensor->regmap, OV2680_REG_HORIZONTAL_OUTPUT_SIZE, 396 sensor->mode.h_output_size, &ret); 397 cci_write(sensor->regmap, OV2680_REG_VERTICAL_OUTPUT_SIZE, 398 sensor->mode.v_output_size, &ret); 399 cci_write(sensor->regmap, OV2680_REG_TIMING_HTS, 400 OV2680_PIXELS_PER_LINE, &ret); 401 /* VTS gets set by the vblank ctrl */ 402 cci_write(sensor->regmap, OV2680_REG_ISP_X_WIN, 0, &ret); 403 cci_write(sensor->regmap, OV2680_REG_ISP_Y_WIN, 0, &ret); 404 cci_write(sensor->regmap, OV2680_REG_X_INC, inc, &ret); 405 cci_write(sensor->regmap, OV2680_REG_Y_INC, inc, &ret); 406 cci_write(sensor->regmap, OV2680_REG_X_WIN, 407 sensor->mode.h_output_size, &ret); 408 cci_write(sensor->regmap, OV2680_REG_Y_WIN, 409 sensor->mode.v_output_size, &ret); 410 cci_write(sensor->regmap, OV2680_REG_FORMAT1, fmt1, &ret); 411 cci_write(sensor->regmap, OV2680_REG_FORMAT2, fmt2, &ret); 412 413 return ret; 414 } 415 416 static int ov2680_set_vflip(struct ov2680_dev *sensor, s32 val) 417 { 418 int ret; 419 420 if (sensor->is_streaming) 421 return -EBUSY; 422 423 ret = cci_update_bits(sensor->regmap, OV2680_REG_FORMAT1, 424 BIT(2), val ? BIT(2) : 0, NULL); 425 if (ret < 0) 426 return ret; 427 428 ov2680_set_bayer_order(sensor, &sensor->mode.fmt); 429 return 0; 430 } 431 432 static int ov2680_set_hflip(struct ov2680_dev *sensor, s32 val) 433 { 434 int ret; 435 436 if (sensor->is_streaming) 437 return -EBUSY; 438 439 ret = cci_update_bits(sensor->regmap, OV2680_REG_FORMAT2, 440 BIT(2), val ? BIT(2) : 0, NULL); 441 if (ret < 0) 442 return ret; 443 444 ov2680_set_bayer_order(sensor, &sensor->mode.fmt); 445 return 0; 446 } 447 448 static int ov2680_test_pattern_set(struct ov2680_dev *sensor, int value) 449 { 450 int ret = 0; 451 452 if (!value) 453 return cci_update_bits(sensor->regmap, OV2680_REG_ISP_CTRL00, 454 BIT(7), 0, NULL); 455 456 cci_update_bits(sensor->regmap, OV2680_REG_ISP_CTRL00, 457 0x03, value - 1, &ret); 458 cci_update_bits(sensor->regmap, OV2680_REG_ISP_CTRL00, 459 BIT(7), BIT(7), &ret); 460 461 return ret; 462 } 463 464 static int ov2680_gain_set(struct ov2680_dev *sensor, u32 gain) 465 { 466 return cci_write(sensor->regmap, OV2680_REG_GAIN_PK, gain, NULL); 467 } 468 469 static int ov2680_exposure_set(struct ov2680_dev *sensor, u32 exp) 470 { 471 return cci_write(sensor->regmap, OV2680_REG_EXPOSURE_PK, exp << 4, 472 NULL); 473 } 474 475 static int ov2680_exposure_update_range(struct ov2680_dev *sensor) 476 { 477 int exp_max = sensor->mode.fmt.height + sensor->ctrls.vblank->val - 478 OV2680_INTEGRATION_TIME_MARGIN; 479 480 return __v4l2_ctrl_modify_range(sensor->ctrls.exposure, 0, exp_max, 481 1, exp_max); 482 } 483 484 static int ov2680_stream_enable(struct ov2680_dev *sensor) 485 { 486 int ret; 487 488 ret = cci_write(sensor->regmap, OV2680_REG_PLL_MULTIPLIER, 489 sensor->pll_mult, NULL); 490 if (ret < 0) 491 return ret; 492 493 ret = regmap_multi_reg_write(sensor->regmap, 494 ov2680_global_setting, 495 ARRAY_SIZE(ov2680_global_setting)); 496 if (ret < 0) 497 return ret; 498 499 ret = ov2680_set_mode(sensor); 500 if (ret < 0) 501 return ret; 502 503 /* Restore value of all ctrls */ 504 ret = __v4l2_ctrl_handler_setup(&sensor->ctrls.handler); 505 if (ret < 0) 506 return ret; 507 508 return cci_write(sensor->regmap, OV2680_REG_STREAM_CTRL, 1, NULL); 509 } 510 511 static int ov2680_stream_disable(struct ov2680_dev *sensor) 512 { 513 return cci_write(sensor->regmap, OV2680_REG_STREAM_CTRL, 0, NULL); 514 } 515 516 static int ov2680_power_off(struct ov2680_dev *sensor) 517 { 518 clk_disable_unprepare(sensor->xvclk); 519 ov2680_power_down(sensor); 520 regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies); 521 return 0; 522 } 523 524 static int ov2680_power_on(struct ov2680_dev *sensor) 525 { 526 int ret; 527 528 ret = regulator_bulk_enable(OV2680_NUM_SUPPLIES, sensor->supplies); 529 if (ret < 0) { 530 dev_err(sensor->dev, "failed to enable regulators: %d\n", ret); 531 return ret; 532 } 533 534 if (!sensor->pwdn_gpio) { 535 ret = cci_write(sensor->regmap, OV2680_REG_SOFT_RESET, 0x01, 536 NULL); 537 if (ret != 0) { 538 dev_err(sensor->dev, "sensor soft reset failed\n"); 539 goto err_disable_regulators; 540 } 541 usleep_range(1000, 2000); 542 } else { 543 ov2680_power_down(sensor); 544 ov2680_power_up(sensor); 545 } 546 547 ret = clk_prepare_enable(sensor->xvclk); 548 if (ret < 0) 549 goto err_disable_regulators; 550 551 return 0; 552 553 err_disable_regulators: 554 regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies); 555 return ret; 556 } 557 558 static int ov2680_get_frame_interval(struct v4l2_subdev *sd, 559 struct v4l2_subdev_state *sd_state, 560 struct v4l2_subdev_frame_interval *fi) 561 { 562 struct ov2680_dev *sensor = to_ov2680_dev(sd); 563 564 /* 565 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2 566 * subdev active state API. 567 */ 568 if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE) 569 return -EINVAL; 570 571 mutex_lock(&sensor->lock); 572 fi->interval = sensor->mode.frame_interval; 573 mutex_unlock(&sensor->lock); 574 575 return 0; 576 } 577 578 static int ov2680_s_stream(struct v4l2_subdev *sd, int enable) 579 { 580 struct ov2680_dev *sensor = to_ov2680_dev(sd); 581 int ret = 0; 582 583 mutex_lock(&sensor->lock); 584 585 if (sensor->is_streaming == !!enable) 586 goto unlock; 587 588 if (enable) { 589 ret = pm_runtime_resume_and_get(sensor->sd.dev); 590 if (ret < 0) 591 goto unlock; 592 593 ret = ov2680_stream_enable(sensor); 594 if (ret < 0) { 595 pm_runtime_put(sensor->sd.dev); 596 goto unlock; 597 } 598 } else { 599 ret = ov2680_stream_disable(sensor); 600 pm_runtime_put(sensor->sd.dev); 601 } 602 603 sensor->is_streaming = !!enable; 604 605 unlock: 606 mutex_unlock(&sensor->lock); 607 608 return ret; 609 } 610 611 static int ov2680_enum_mbus_code(struct v4l2_subdev *sd, 612 struct v4l2_subdev_state *sd_state, 613 struct v4l2_subdev_mbus_code_enum *code) 614 { 615 struct ov2680_dev *sensor = to_ov2680_dev(sd); 616 617 if (code->index != 0) 618 return -EINVAL; 619 620 code->code = sensor->mode.fmt.code; 621 622 return 0; 623 } 624 625 static int ov2680_get_fmt(struct v4l2_subdev *sd, 626 struct v4l2_subdev_state *sd_state, 627 struct v4l2_subdev_format *format) 628 { 629 struct ov2680_dev *sensor = to_ov2680_dev(sd); 630 struct v4l2_mbus_framefmt *fmt; 631 632 fmt = __ov2680_get_pad_format(sensor, sd_state, format->pad, 633 format->which); 634 635 mutex_lock(&sensor->lock); 636 format->format = *fmt; 637 mutex_unlock(&sensor->lock); 638 639 return 0; 640 } 641 642 static int ov2680_set_fmt(struct v4l2_subdev *sd, 643 struct v4l2_subdev_state *sd_state, 644 struct v4l2_subdev_format *format) 645 { 646 struct ov2680_dev *sensor = to_ov2680_dev(sd); 647 struct v4l2_mbus_framefmt *try_fmt; 648 const struct v4l2_rect *crop; 649 unsigned int width, height; 650 int def, max, ret = 0; 651 652 crop = __ov2680_get_pad_crop(sensor, sd_state, format->pad, 653 format->which); 654 655 /* Limit set_fmt max size to crop width / height */ 656 width = clamp_val(ALIGN(format->format.width, 2), 657 OV2680_MIN_CROP_WIDTH, crop->width); 658 height = clamp_val(ALIGN(format->format.height, 2), 659 OV2680_MIN_CROP_HEIGHT, crop->height); 660 661 ov2680_fill_format(sensor, &format->format, width, height); 662 663 if (format->which == V4L2_SUBDEV_FORMAT_TRY) { 664 try_fmt = v4l2_subdev_state_get_format(sd_state, 0); 665 *try_fmt = format->format; 666 return 0; 667 } 668 669 mutex_lock(&sensor->lock); 670 671 if (sensor->is_streaming) { 672 ret = -EBUSY; 673 goto unlock; 674 } 675 676 sensor->mode.fmt = format->format; 677 ov2680_calc_mode(sensor); 678 679 /* vblank range is height dependent adjust and reset to default */ 680 max = OV2680_MAX_VBLANK - height; 681 def = OV2680_LINES_PER_FRAME_30FPS - height; 682 ret = __v4l2_ctrl_modify_range(sensor->ctrls.vblank, OV2680_MIN_VBLANK, 683 max, 1, def); 684 if (ret) 685 goto unlock; 686 687 ret = __v4l2_ctrl_s_ctrl(sensor->ctrls.vblank, def); 688 if (ret) 689 goto unlock; 690 691 /* exposure range depends on vts which may have changed */ 692 ret = ov2680_exposure_update_range(sensor); 693 if (ret) 694 goto unlock; 695 696 /* adjust hblank value for new width */ 697 def = OV2680_PIXELS_PER_LINE - width; 698 ret = __v4l2_ctrl_modify_range(sensor->ctrls.hblank, def, def, 1, def); 699 700 unlock: 701 mutex_unlock(&sensor->lock); 702 703 return ret; 704 } 705 706 static int ov2680_get_selection(struct v4l2_subdev *sd, 707 struct v4l2_subdev_state *state, 708 struct v4l2_subdev_selection *sel) 709 { 710 struct ov2680_dev *sensor = to_ov2680_dev(sd); 711 712 switch (sel->target) { 713 case V4L2_SEL_TGT_CROP: 714 mutex_lock(&sensor->lock); 715 sel->r = *__ov2680_get_pad_crop(sensor, state, sel->pad, 716 sel->which); 717 mutex_unlock(&sensor->lock); 718 break; 719 case V4L2_SEL_TGT_NATIVE_SIZE: 720 case V4L2_SEL_TGT_CROP_BOUNDS: 721 sel->r.top = 0; 722 sel->r.left = 0; 723 sel->r.width = OV2680_NATIVE_WIDTH; 724 sel->r.height = OV2680_NATIVE_HEIGHT; 725 break; 726 case V4L2_SEL_TGT_CROP_DEFAULT: 727 sel->r = ov2680_default_crop; 728 break; 729 default: 730 return -EINVAL; 731 } 732 733 return 0; 734 } 735 736 static int ov2680_set_selection(struct v4l2_subdev *sd, 737 struct v4l2_subdev_state *state, 738 struct v4l2_subdev_selection *sel) 739 { 740 struct ov2680_dev *sensor = to_ov2680_dev(sd); 741 struct v4l2_mbus_framefmt *format; 742 struct v4l2_rect *crop; 743 struct v4l2_rect rect; 744 745 if (sel->target != V4L2_SEL_TGT_CROP) 746 return -EINVAL; 747 748 /* 749 * Clamp the boundaries of the crop rectangle to the size of the sensor 750 * pixel array. Align to multiples of 2 to ensure Bayer pattern isn't 751 * disrupted. 752 */ 753 rect.left = clamp_val(ALIGN(sel->r.left, 2), 754 OV2680_NATIVE_START_LEFT, OV2680_NATIVE_WIDTH); 755 rect.top = clamp_val(ALIGN(sel->r.top, 2), 756 OV2680_NATIVE_START_TOP, OV2680_NATIVE_HEIGHT); 757 rect.width = clamp_val(ALIGN(sel->r.width, 2), 758 OV2680_MIN_CROP_WIDTH, OV2680_NATIVE_WIDTH); 759 rect.height = clamp_val(ALIGN(sel->r.height, 2), 760 OV2680_MIN_CROP_HEIGHT, OV2680_NATIVE_HEIGHT); 761 762 /* Make sure the crop rectangle isn't outside the bounds of the array */ 763 rect.width = min_t(unsigned int, rect.width, 764 OV2680_NATIVE_WIDTH - rect.left); 765 rect.height = min_t(unsigned int, rect.height, 766 OV2680_NATIVE_HEIGHT - rect.top); 767 768 crop = __ov2680_get_pad_crop(sensor, state, sel->pad, sel->which); 769 770 mutex_lock(&sensor->lock); 771 if (rect.width != crop->width || rect.height != crop->height) { 772 /* 773 * Reset the output image size if the crop rectangle size has 774 * been modified. 775 */ 776 format = __ov2680_get_pad_format(sensor, state, sel->pad, 777 sel->which); 778 format->width = rect.width; 779 format->height = rect.height; 780 } 781 782 *crop = rect; 783 mutex_unlock(&sensor->lock); 784 785 sel->r = rect; 786 787 return 0; 788 } 789 790 static int ov2680_init_state(struct v4l2_subdev *sd, 791 struct v4l2_subdev_state *sd_state) 792 { 793 struct ov2680_dev *sensor = to_ov2680_dev(sd); 794 795 *v4l2_subdev_state_get_crop(sd_state, 0) = ov2680_default_crop; 796 797 ov2680_fill_format(sensor, v4l2_subdev_state_get_format(sd_state, 0), 798 OV2680_DEFAULT_WIDTH, OV2680_DEFAULT_HEIGHT); 799 return 0; 800 } 801 802 static int ov2680_enum_frame_size(struct v4l2_subdev *sd, 803 struct v4l2_subdev_state *sd_state, 804 struct v4l2_subdev_frame_size_enum *fse) 805 { 806 struct ov2680_dev *sensor = to_ov2680_dev(sd); 807 struct v4l2_rect *crop; 808 809 if (fse->index >= OV2680_FRAME_SIZES) 810 return -EINVAL; 811 812 crop = __ov2680_get_pad_crop(sensor, sd_state, fse->pad, fse->which); 813 if (!crop) 814 return -EINVAL; 815 816 fse->min_width = crop->width / (fse->index + 1); 817 fse->min_height = crop->height / (fse->index + 1); 818 fse->max_width = fse->min_width; 819 fse->max_height = fse->min_height; 820 821 return 0; 822 } 823 824 static bool ov2680_valid_frame_size(struct v4l2_subdev *sd, 825 struct v4l2_subdev_state *sd_state, 826 struct v4l2_subdev_frame_interval_enum *fie) 827 { 828 struct v4l2_subdev_frame_size_enum fse = { 829 .pad = fie->pad, 830 .which = fie->which, 831 }; 832 int i; 833 834 for (i = 0; i < OV2680_FRAME_SIZES; i++) { 835 fse.index = i; 836 837 if (ov2680_enum_frame_size(sd, sd_state, &fse)) 838 return false; 839 840 if (fie->width == fse.min_width && 841 fie->height == fse.min_height) 842 return true; 843 } 844 845 return false; 846 } 847 848 static int ov2680_enum_frame_interval(struct v4l2_subdev *sd, 849 struct v4l2_subdev_state *sd_state, 850 struct v4l2_subdev_frame_interval_enum *fie) 851 { 852 struct ov2680_dev *sensor = to_ov2680_dev(sd); 853 854 /* Only 1 framerate */ 855 if (fie->index || !ov2680_valid_frame_size(sd, sd_state, fie)) 856 return -EINVAL; 857 858 fie->interval = sensor->mode.frame_interval; 859 860 return 0; 861 } 862 863 static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl) 864 { 865 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 866 struct ov2680_dev *sensor = to_ov2680_dev(sd); 867 int ret; 868 869 /* Update exposure range on vblank changes */ 870 if (ctrl->id == V4L2_CID_VBLANK) { 871 ret = ov2680_exposure_update_range(sensor); 872 if (ret) 873 return ret; 874 } 875 876 /* Only apply changes to the controls if the device is powered up */ 877 if (!pm_runtime_get_if_in_use(sensor->sd.dev)) { 878 ov2680_set_bayer_order(sensor, &sensor->mode.fmt); 879 return 0; 880 } 881 882 switch (ctrl->id) { 883 case V4L2_CID_ANALOGUE_GAIN: 884 ret = ov2680_gain_set(sensor, ctrl->val); 885 break; 886 case V4L2_CID_EXPOSURE: 887 ret = ov2680_exposure_set(sensor, ctrl->val); 888 break; 889 case V4L2_CID_VFLIP: 890 ret = ov2680_set_vflip(sensor, ctrl->val); 891 break; 892 case V4L2_CID_HFLIP: 893 ret = ov2680_set_hflip(sensor, ctrl->val); 894 break; 895 case V4L2_CID_TEST_PATTERN: 896 ret = ov2680_test_pattern_set(sensor, ctrl->val); 897 break; 898 case V4L2_CID_VBLANK: 899 ret = cci_write(sensor->regmap, OV2680_REG_TIMING_VTS, 900 sensor->mode.fmt.height + ctrl->val, NULL); 901 break; 902 default: 903 ret = -EINVAL; 904 break; 905 } 906 907 pm_runtime_put(sensor->sd.dev); 908 return ret; 909 } 910 911 static const struct v4l2_ctrl_ops ov2680_ctrl_ops = { 912 .s_ctrl = ov2680_s_ctrl, 913 }; 914 915 static const struct v4l2_subdev_video_ops ov2680_video_ops = { 916 .s_stream = ov2680_s_stream, 917 }; 918 919 static const struct v4l2_subdev_pad_ops ov2680_pad_ops = { 920 .enum_mbus_code = ov2680_enum_mbus_code, 921 .enum_frame_size = ov2680_enum_frame_size, 922 .enum_frame_interval = ov2680_enum_frame_interval, 923 .get_fmt = ov2680_get_fmt, 924 .set_fmt = ov2680_set_fmt, 925 .get_selection = ov2680_get_selection, 926 .set_selection = ov2680_set_selection, 927 .get_frame_interval = ov2680_get_frame_interval, 928 .set_frame_interval = ov2680_get_frame_interval, 929 }; 930 931 static const struct v4l2_subdev_ops ov2680_subdev_ops = { 932 .video = &ov2680_video_ops, 933 .pad = &ov2680_pad_ops, 934 }; 935 936 static const struct v4l2_subdev_internal_ops ov2680_internal_ops = { 937 .init_state = ov2680_init_state, 938 }; 939 940 static int ov2680_mode_init(struct ov2680_dev *sensor) 941 { 942 /* set initial mode */ 943 sensor->mode.crop = ov2680_default_crop; 944 ov2680_fill_format(sensor, &sensor->mode.fmt, 945 OV2680_DEFAULT_WIDTH, OV2680_DEFAULT_HEIGHT); 946 ov2680_calc_mode(sensor); 947 948 sensor->mode.frame_interval.denominator = OV2680_FRAME_RATE; 949 sensor->mode.frame_interval.numerator = 1; 950 951 return 0; 952 } 953 954 static int ov2680_v4l2_register(struct ov2680_dev *sensor) 955 { 956 struct i2c_client *client = to_i2c_client(sensor->dev); 957 const struct v4l2_ctrl_ops *ops = &ov2680_ctrl_ops; 958 struct ov2680_ctrls *ctrls = &sensor->ctrls; 959 struct v4l2_ctrl_handler *hdl = &ctrls->handler; 960 struct v4l2_fwnode_device_properties props; 961 int def, max, ret = 0; 962 963 v4l2_i2c_subdev_init(&sensor->sd, client, &ov2680_subdev_ops); 964 sensor->sd.internal_ops = &ov2680_internal_ops; 965 966 sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; 967 sensor->pad.flags = MEDIA_PAD_FL_SOURCE; 968 sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 969 970 ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad); 971 if (ret < 0) 972 return ret; 973 974 v4l2_ctrl_handler_init(hdl, 11); 975 976 hdl->lock = &sensor->lock; 977 978 ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0); 979 ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0); 980 981 ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, 982 &ov2680_ctrl_ops, V4L2_CID_TEST_PATTERN, 983 ARRAY_SIZE(test_pattern_menu) - 1, 984 0, 0, test_pattern_menu); 985 986 max = OV2680_LINES_PER_FRAME_30FPS - OV2680_INTEGRATION_TIME_MARGIN; 987 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, 988 0, max, 1, max); 989 990 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN, 991 0, 1023, 1, 250); 992 993 ctrls->link_freq = v4l2_ctrl_new_int_menu(hdl, NULL, V4L2_CID_LINK_FREQ, 994 0, 0, sensor->link_freq); 995 ctrls->pixel_rate = v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_PIXEL_RATE, 996 0, sensor->pixel_rate, 997 1, sensor->pixel_rate); 998 999 max = OV2680_MAX_VBLANK - OV2680_DEFAULT_HEIGHT; 1000 def = OV2680_LINES_PER_FRAME_30FPS - OV2680_DEFAULT_HEIGHT; 1001 ctrls->vblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VBLANK, 1002 OV2680_MIN_VBLANK, max, 1, def); 1003 1004 def = OV2680_PIXELS_PER_LINE - OV2680_DEFAULT_WIDTH; 1005 ctrls->hblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HBLANK, 1006 def, def, 1, def); 1007 1008 ret = v4l2_fwnode_device_parse(sensor->dev, &props); 1009 if (ret) 1010 goto cleanup_entity; 1011 1012 v4l2_ctrl_new_fwnode_properties(hdl, ops, &props); 1013 1014 if (hdl->error) { 1015 ret = hdl->error; 1016 goto cleanup_entity; 1017 } 1018 1019 ctrls->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; 1020 ctrls->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; 1021 ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; 1022 ctrls->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; 1023 1024 sensor->sd.ctrl_handler = hdl; 1025 1026 ret = v4l2_async_register_subdev(&sensor->sd); 1027 if (ret < 0) 1028 goto cleanup_entity; 1029 1030 return 0; 1031 1032 cleanup_entity: 1033 media_entity_cleanup(&sensor->sd.entity); 1034 v4l2_ctrl_handler_free(hdl); 1035 1036 return ret; 1037 } 1038 1039 static int ov2680_get_regulators(struct ov2680_dev *sensor) 1040 { 1041 int i; 1042 1043 for (i = 0; i < OV2680_NUM_SUPPLIES; i++) 1044 sensor->supplies[i].supply = ov2680_supply_name[i]; 1045 1046 return devm_regulator_bulk_get(sensor->dev, 1047 OV2680_NUM_SUPPLIES, sensor->supplies); 1048 } 1049 1050 static int ov2680_check_id(struct ov2680_dev *sensor) 1051 { 1052 u64 chip_id, rev; 1053 int ret = 0; 1054 1055 cci_read(sensor->regmap, OV2680_REG_CHIP_ID, &chip_id, &ret); 1056 cci_read(sensor->regmap, OV2680_REG_SC_CMMN_SUB_ID, &rev, &ret); 1057 if (ret < 0) { 1058 dev_err(sensor->dev, "failed to read chip id\n"); 1059 return ret; 1060 } 1061 1062 if (chip_id != OV2680_CHIP_ID) { 1063 dev_err(sensor->dev, "chip id: 0x%04llx does not match expected 0x%04x\n", 1064 chip_id, OV2680_CHIP_ID); 1065 return -ENODEV; 1066 } 1067 1068 dev_info(sensor->dev, "sensor_revision id = 0x%llx, rev= %lld\n", 1069 chip_id, rev & 0x0f); 1070 1071 return 0; 1072 } 1073 1074 static int ov2680_parse_dt(struct ov2680_dev *sensor) 1075 { 1076 struct v4l2_fwnode_endpoint bus_cfg = { 1077 .bus_type = V4L2_MBUS_CSI2_DPHY, 1078 }; 1079 struct device *dev = sensor->dev; 1080 struct fwnode_handle *ep_fwnode; 1081 struct gpio_desc *gpio; 1082 unsigned int rate = 0; 1083 int i, ret; 1084 1085 /* 1086 * Sometimes the fwnode graph is initialized by the bridge driver. 1087 * Bridge drivers doing this may also add GPIO mappings, wait for this. 1088 */ 1089 ep_fwnode = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL); 1090 if (!ep_fwnode) 1091 return dev_err_probe(dev, -EPROBE_DEFER, 1092 "waiting for fwnode graph endpoint\n"); 1093 1094 ret = v4l2_fwnode_endpoint_alloc_parse(ep_fwnode, &bus_cfg); 1095 fwnode_handle_put(ep_fwnode); 1096 if (ret) 1097 return ret; 1098 1099 /* 1100 * The pin we want is named XSHUTDN in the datasheet. Linux sensor 1101 * drivers have standardized on using "powerdown" as con-id name 1102 * for powerdown or shutdown pins. Older DTB files use "reset", 1103 * so fallback to that if there is no "powerdown" pin. 1104 */ 1105 gpio = devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH); 1106 if (!gpio) 1107 gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 1108 1109 ret = PTR_ERR_OR_ZERO(gpio); 1110 if (ret < 0) { 1111 dev_dbg(dev, "error while getting reset gpio: %d\n", ret); 1112 goto out_free_bus_cfg; 1113 } 1114 1115 sensor->pwdn_gpio = gpio; 1116 1117 sensor->xvclk = devm_clk_get_optional(dev, "xvclk"); 1118 if (IS_ERR(sensor->xvclk)) { 1119 ret = dev_err_probe(dev, PTR_ERR(sensor->xvclk), 1120 "xvclk clock missing or invalid\n"); 1121 goto out_free_bus_cfg; 1122 } 1123 1124 /* 1125 * We could have either a 24MHz or 19.2MHz clock rate from either DT or 1126 * ACPI... but we also need to support the weird IPU3 case which will 1127 * have an external clock AND a clock-frequency property. Check for the 1128 * clock-frequency property and if found, set that rate if we managed 1129 * to acquire a clock. This should cover the ACPI case. If the system 1130 * uses devicetree then the configured rate should already be set, so 1131 * we can just read it. 1132 */ 1133 ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency", 1134 &rate); 1135 if (ret && !sensor->xvclk) { 1136 dev_err_probe(dev, ret, "invalid clock config\n"); 1137 goto out_free_bus_cfg; 1138 } 1139 1140 if (!ret && sensor->xvclk) { 1141 ret = clk_set_rate(sensor->xvclk, rate); 1142 if (ret) { 1143 dev_err_probe(dev, ret, "failed to set clock rate\n"); 1144 goto out_free_bus_cfg; 1145 } 1146 } 1147 1148 sensor->xvclk_freq = rate ?: clk_get_rate(sensor->xvclk); 1149 1150 for (i = 0; i < ARRAY_SIZE(ov2680_xvclk_freqs); i++) { 1151 if (sensor->xvclk_freq == ov2680_xvclk_freqs[i]) 1152 break; 1153 } 1154 1155 if (i == ARRAY_SIZE(ov2680_xvclk_freqs)) { 1156 ret = dev_err_probe(dev, -EINVAL, 1157 "unsupported xvclk frequency %d Hz\n", 1158 sensor->xvclk_freq); 1159 goto out_free_bus_cfg; 1160 } 1161 1162 sensor->pll_mult = ov2680_pll_multipliers[i]; 1163 1164 sensor->link_freq[0] = sensor->xvclk_freq / OV2680_PLL_PREDIV0 / 1165 OV2680_PLL_PREDIV * sensor->pll_mult; 1166 1167 /* CSI-2 is double data rate, bus-format is 10 bpp */ 1168 sensor->pixel_rate = sensor->link_freq[0] * 2; 1169 do_div(sensor->pixel_rate, 10); 1170 1171 if (!bus_cfg.nr_of_link_frequencies) { 1172 dev_warn(dev, "Consider passing 'link-frequencies' in DT\n"); 1173 goto skip_link_freq_validation; 1174 } 1175 1176 for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) 1177 if (bus_cfg.link_frequencies[i] == sensor->link_freq[0]) 1178 break; 1179 1180 if (bus_cfg.nr_of_link_frequencies == i) { 1181 ret = dev_err_probe(dev, -EINVAL, 1182 "supported link freq %lld not found\n", 1183 sensor->link_freq[0]); 1184 goto out_free_bus_cfg; 1185 } 1186 1187 skip_link_freq_validation: 1188 ret = 0; 1189 out_free_bus_cfg: 1190 v4l2_fwnode_endpoint_free(&bus_cfg); 1191 return ret; 1192 } 1193 1194 static int ov2680_probe(struct i2c_client *client) 1195 { 1196 struct device *dev = &client->dev; 1197 struct ov2680_dev *sensor; 1198 int ret; 1199 1200 sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); 1201 if (!sensor) 1202 return -ENOMEM; 1203 1204 sensor->dev = &client->dev; 1205 1206 sensor->regmap = devm_cci_regmap_init_i2c(client, 16); 1207 if (IS_ERR(sensor->regmap)) 1208 return PTR_ERR(sensor->regmap); 1209 1210 ret = ov2680_parse_dt(sensor); 1211 if (ret < 0) 1212 return ret; 1213 1214 ret = ov2680_mode_init(sensor); 1215 if (ret < 0) 1216 return ret; 1217 1218 ret = ov2680_get_regulators(sensor); 1219 if (ret < 0) { 1220 dev_err(dev, "failed to get regulators\n"); 1221 return ret; 1222 } 1223 1224 mutex_init(&sensor->lock); 1225 1226 /* 1227 * Power up and verify the chip now, so that if runtime pm is 1228 * disabled the chip is left on and streaming will work. 1229 */ 1230 ret = ov2680_power_on(sensor); 1231 if (ret < 0) 1232 goto lock_destroy; 1233 1234 ret = ov2680_check_id(sensor); 1235 if (ret < 0) 1236 goto err_powerdown; 1237 1238 pm_runtime_set_active(&client->dev); 1239 pm_runtime_get_noresume(&client->dev); 1240 pm_runtime_enable(&client->dev); 1241 1242 ret = ov2680_v4l2_register(sensor); 1243 if (ret < 0) 1244 goto err_pm_runtime; 1245 1246 pm_runtime_set_autosuspend_delay(&client->dev, 1000); 1247 pm_runtime_use_autosuspend(&client->dev); 1248 pm_runtime_put_autosuspend(&client->dev); 1249 1250 return 0; 1251 1252 err_pm_runtime: 1253 pm_runtime_disable(&client->dev); 1254 pm_runtime_put_noidle(&client->dev); 1255 err_powerdown: 1256 ov2680_power_off(sensor); 1257 lock_destroy: 1258 dev_err(dev, "ov2680 init fail: %d\n", ret); 1259 mutex_destroy(&sensor->lock); 1260 1261 return ret; 1262 } 1263 1264 static void ov2680_remove(struct i2c_client *client) 1265 { 1266 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1267 struct ov2680_dev *sensor = to_ov2680_dev(sd); 1268 1269 v4l2_async_unregister_subdev(&sensor->sd); 1270 mutex_destroy(&sensor->lock); 1271 media_entity_cleanup(&sensor->sd.entity); 1272 v4l2_ctrl_handler_free(&sensor->ctrls.handler); 1273 1274 /* 1275 * Disable runtime PM. In case runtime PM is disabled in the kernel, 1276 * make sure to turn power off manually. 1277 */ 1278 pm_runtime_disable(&client->dev); 1279 if (!pm_runtime_status_suspended(&client->dev)) 1280 ov2680_power_off(sensor); 1281 pm_runtime_set_suspended(&client->dev); 1282 } 1283 1284 static int ov2680_suspend(struct device *dev) 1285 { 1286 struct v4l2_subdev *sd = dev_get_drvdata(dev); 1287 struct ov2680_dev *sensor = to_ov2680_dev(sd); 1288 1289 if (sensor->is_streaming) 1290 ov2680_stream_disable(sensor); 1291 1292 return ov2680_power_off(sensor); 1293 } 1294 1295 static int ov2680_resume(struct device *dev) 1296 { 1297 struct v4l2_subdev *sd = dev_get_drvdata(dev); 1298 struct ov2680_dev *sensor = to_ov2680_dev(sd); 1299 int ret; 1300 1301 ret = ov2680_power_on(sensor); 1302 if (ret < 0) 1303 goto stream_disable; 1304 1305 if (sensor->is_streaming) { 1306 ret = ov2680_stream_enable(sensor); 1307 if (ret < 0) 1308 goto stream_disable; 1309 } 1310 1311 return 0; 1312 1313 stream_disable: 1314 ov2680_stream_disable(sensor); 1315 sensor->is_streaming = false; 1316 1317 return ret; 1318 } 1319 1320 static DEFINE_RUNTIME_DEV_PM_OPS(ov2680_pm_ops, ov2680_suspend, ov2680_resume, 1321 NULL); 1322 1323 static const struct of_device_id ov2680_dt_ids[] = { 1324 { .compatible = "ovti,ov2680" }, 1325 { /* sentinel */ }, 1326 }; 1327 MODULE_DEVICE_TABLE(of, ov2680_dt_ids); 1328 1329 static const struct acpi_device_id ov2680_acpi_ids[] = { 1330 { "OVTI2680" }, 1331 { /* sentinel */ } 1332 }; 1333 MODULE_DEVICE_TABLE(acpi, ov2680_acpi_ids); 1334 1335 static struct i2c_driver ov2680_i2c_driver = { 1336 .driver = { 1337 .name = "ov2680", 1338 .pm = pm_sleep_ptr(&ov2680_pm_ops), 1339 .of_match_table = ov2680_dt_ids, 1340 .acpi_match_table = ov2680_acpi_ids, 1341 }, 1342 .probe = ov2680_probe, 1343 .remove = ov2680_remove, 1344 }; 1345 module_i2c_driver(ov2680_i2c_driver); 1346 1347 MODULE_AUTHOR("Rui Miguel Silva <rui.silva@linaro.org>"); 1348 MODULE_DESCRIPTION("OV2680 CMOS Image Sensor driver"); 1349 MODULE_LICENSE("GPL v2"); 1350